diff options
author | Dima Zavin <dima@android.com> | 2011-01-05 11:53:36 -0800 |
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committer | Dima Zavin <dima@android.com> | 2011-01-06 13:25:24 -0800 |
commit | bb460adaf05676cd904301c230a370dd6af74989 (patch) | |
tree | 5236d2a077d0f43d101ed2416a2539a4fda7a85a | |
parent | baee878005900006a70114d92839b57c30c056f7 (diff) | |
download | experimental-bb460adaf05676cd904301c230a370dd6af74989.tar.gz |
yaffs: Import yaffs from Thu Dec 23 13:31:37 2010 +1300
commit ddf33fed15c2376bfb602d62dd018c63fce60df8
Author: Timothy Manning <tfhmanning@gmail.com>
Date: Thu Dec 23 13:31:37 2010 +1300
yaffs updated direct/timothy_tests/quick_tests
Signed-off-by: Timothy Manning <tfhmanning@gmail.com>
Change-Id: I5bbe5a05277bdf8a6fe188bbe4c77725b3fa2aae
Signed-off-by: Dima Zavin <dima@android.com>
48 files changed, 10960 insertions, 11769 deletions
diff --git a/fs/yaffs2/Kconfig b/fs/yaffs2/Kconfig index d4363edcdbf..63541405999 100644 --- a/fs/yaffs2/Kconfig +++ b/fs/yaffs2/Kconfig @@ -102,22 +102,6 @@ config YAFFS_DISABLE_TAGS_ECC If unsure, say N. - -config YAFFS_DISABLE_WIDE_TNODES - bool "Turn off wide tnodes" - depends on YAFFS_FS - default n - help - Wide tnodes are only used for NAND arrays >=32MB for 512-byte - page devices and >=128MB for 2k page devices. They use slightly - more RAM but are faster since they eliminate chunk group - searching. - - Setting this to 'y' will force tnode width to 16 bits and save - memory but make large arrays slower. - - If unsure, say N. - config YAFFS_ALWAYS_CHECK_CHUNK_ERASED bool "Force chunk erase check" depends on YAFFS_FS @@ -136,17 +120,6 @@ config YAFFS_ALWAYS_CHECK_CHUNK_ERASED If unsure, say Y. -config YAFFS_SHORT_NAMES_IN_RAM - bool "Cache short names in RAM" - depends on YAFFS_FS - default y - help - If this config is set, then short names are stored with the - yaffs_Object. This costs an extra 16 bytes of RAM per object, - but makes look-ups faster. - - If unsure, say Y. - config YAFFS_EMPTY_LOST_AND_FOUND bool "Empty lost and found on boot" depends on YAFFS_FS @@ -177,4 +150,12 @@ config YAFFS_DISABLE_BACKGROUND If this is set, then background processing is disabled. Background processing makes many foreground activities faster. - If unsure, say N. + If unsure, say N. + +config YAFFS_XATTR + bool "Enable yaffs2 xattr support" + depends on YAFFS_FS + default y + help + If this is set then yaffs2 will provide xattr support. + If unsure, say Y. diff --git a/fs/yaffs2/Makefile b/fs/yaffs2/Makefile index 382ee6142cf..e63a28aa3ed 100644 --- a/fs/yaffs2/Makefile +++ b/fs/yaffs2/Makefile @@ -4,7 +4,14 @@ obj-$(CONFIG_YAFFS_FS) += yaffs.o -yaffs-y := yaffs_ecc.o yaffs_fs.o yaffs_guts.o yaffs_checkptrw.o -yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs_qsort.o +yaffs-y := yaffs_ecc.o yaffs_vfs.o yaffs_guts.o yaffs_checkptrw.o +yaffs-y += yaffs_packedtags1.o yaffs_packedtags2.o yaffs_nand.o yaffs-y += yaffs_tagscompat.o yaffs_tagsvalidity.o yaffs-y += yaffs_mtdif.o yaffs_mtdif1.o yaffs_mtdif2.o +yaffs-y += yaffs_nameval.o yaffs_attribs.o +yaffs-y += yaffs_allocator.o +yaffs-y += yaffs_yaffs1.o +yaffs-y += yaffs_yaffs2.o +yaffs-y += yaffs_bitmap.o +yaffs-y += yaffs_verify.o + diff --git a/fs/yaffs2/devextras.h b/fs/yaffs2/devextras.h deleted file mode 100644 index 215caa50f17..00000000000 --- a/fs/yaffs2/devextras.h +++ /dev/null @@ -1,196 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* - * This file is just holds extra declarations of macros that would normally - * be providesd in the Linux kernel. These macros have been written from - * scratch but are functionally equivalent to the Linux ones. - * - */ - -#ifndef __EXTRAS_H__ -#define __EXTRAS_H__ - - -#if !(defined __KERNEL__) - -/* Definition of types */ -typedef unsigned char __u8; -typedef unsigned short __u16; -typedef unsigned __u32; - -#endif - -/* - * This is a simple doubly linked list implementation that matches the - * way the Linux kernel doubly linked list implementation works. - */ - -struct ylist_head { - struct ylist_head *next; /* next in chain */ - struct ylist_head *prev; /* previous in chain */ -}; - - -/* Initialise a static list */ -#define YLIST_HEAD(name) \ -struct ylist_head name = { &(name), &(name)} - - - -/* Initialise a list head to an empty list */ -#define YINIT_LIST_HEAD(p) \ -do { \ - (p)->next = (p);\ - (p)->prev = (p); \ -} while (0) - - -/* Add an element to a list */ -static __inline__ void ylist_add(struct ylist_head *newEntry, - struct ylist_head *list) -{ - struct ylist_head *listNext = list->next; - - list->next = newEntry; - newEntry->prev = list; - newEntry->next = listNext; - listNext->prev = newEntry; - -} - -static __inline__ void ylist_add_tail(struct ylist_head *newEntry, - struct ylist_head *list) -{ - struct ylist_head *listPrev = list->prev; - - list->prev = newEntry; - newEntry->next = list; - newEntry->prev = listPrev; - listPrev->next = newEntry; - -} - - -/* Take an element out of its current list, with or without - * reinitialising the links.of the entry*/ -static __inline__ void ylist_del(struct ylist_head *entry) -{ - struct ylist_head *listNext = entry->next; - struct ylist_head *listPrev = entry->prev; - - listNext->prev = listPrev; - listPrev->next = listNext; - -} - -static __inline__ void ylist_del_init(struct ylist_head *entry) -{ - ylist_del(entry); - entry->next = entry->prev = entry; -} - - -/* Test if the list is empty */ -static __inline__ int ylist_empty(struct ylist_head *entry) -{ - return (entry->next == entry); -} - - -/* ylist_entry takes a pointer to a list entry and offsets it to that - * we can find a pointer to the object it is embedded in. - */ - - -#define ylist_entry(entry, type, member) \ - ((type *)((char *)(entry)-(unsigned long)(&((type *)NULL)->member))) - - -/* ylist_for_each and list_for_each_safe iterate over lists. - * ylist_for_each_safe uses temporary storage to make the list delete safe - */ - -#define ylist_for_each(itervar, list) \ - for (itervar = (list)->next; itervar != (list); itervar = itervar->next) - -#define ylist_for_each_safe(itervar, saveVar, list) \ - for (itervar = (list)->next, saveVar = (list)->next->next; \ - itervar != (list); itervar = saveVar, saveVar = saveVar->next) - - -#if !(defined __KERNEL__) - - -#ifndef WIN32 -#include <sys/stat.h> -#endif - - -#ifdef CONFIG_YAFFS_PROVIDE_DEFS -/* File types */ - - -#define DT_UNKNOWN 0 -#define DT_FIFO 1 -#define DT_CHR 2 -#define DT_DIR 4 -#define DT_BLK 6 -#define DT_REG 8 -#define DT_LNK 10 -#define DT_SOCK 12 -#define DT_WHT 14 - - -#ifndef WIN32 -#include <sys/stat.h> -#endif - -/* - * Attribute flags. These should be or-ed together to figure out what - * has been changed! - */ -#define ATTR_MODE 1 -#define ATTR_UID 2 -#define ATTR_GID 4 -#define ATTR_SIZE 8 -#define ATTR_ATIME 16 -#define ATTR_MTIME 32 -#define ATTR_CTIME 64 - -struct iattr { - unsigned int ia_valid; - unsigned ia_mode; - unsigned ia_uid; - unsigned ia_gid; - unsigned ia_size; - unsigned ia_atime; - unsigned ia_mtime; - unsigned ia_ctime; - unsigned int ia_attr_flags; -}; - -#endif - -#else - -#include <linux/types.h> -#include <linux/fs.h> -#include <linux/stat.h> - -#endif - - -#endif diff --git a/fs/yaffs2/moduleconfig.h b/fs/yaffs2/moduleconfig.h deleted file mode 100644 index e8efd67586a..00000000000 --- a/fs/yaffs2/moduleconfig.h +++ /dev/null @@ -1,82 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Martin Fouts <Martin.Fouts@palmsource.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -#ifndef __YAFFS_CONFIG_H__ -#define __YAFFS_CONFIG_H__ - -#ifdef YAFFS_OUT_OF_TREE - -/* DO NOT UNSET THESE THREE. YAFFS2 will not compile if you do. */ -#define CONFIG_YAFFS_FS -#define CONFIG_YAFFS_YAFFS1 -#define CONFIG_YAFFS_YAFFS2 - -/* These options are independent of each other. Select those that matter. */ - -/* Default: Not selected */ -/* Meaning: Yaffs does its own ECC, rather than using MTD ECC */ -/* #define CONFIG_YAFFS_DOES_ECC */ - -/* Default: Selected */ -/* Meaning: Yaffs does its own ECC on tags for packed tags rather than use mtd */ -#define CONFIG_YAFFS_DOES_TAGS_ECC - -/* Default: Not selected */ -/* Meaning: ECC byte order is 'wrong'. Only meaningful if */ -/* CONFIG_YAFFS_DOES_ECC is set */ -/* #define CONFIG_YAFFS_ECC_WRONG_ORDER */ - -/* Default: Not selected */ -/* Meaning: Always test whether chunks are erased before writing to them. - Use during mtd debugging and init. */ -/* #define CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED */ - -/* Default: Not Selected */ -/* Meaning: At mount automatically empty all files from lost and found. */ -/* This is done to fix an old problem where rmdir was not checking for an */ -/* empty directory. This can also be achieved with a mount option. */ -#define CONFIG_YAFFS_EMPTY_LOST_AND_FOUND - -/* Default: Selected */ -/* Meaning: Cache short names, taking more RAM, but faster look-ups */ -#define CONFIG_YAFFS_SHORT_NAMES_IN_RAM - -/* Default: Unselected */ -/* Meaning: Select to disable block refreshing. */ -/* Block Refreshing periodically rewrites the oldest block. */ -/* #define CONFIG_DISABLE_BLOCK_REFRESHING */ - -/* Default: Unselected */ -/* Meaning: Select to disable background processing */ -/* #define CONFIG_DISABLE_BACKGROUND */ - - -/* -Older-style on-NAND data format has a "pageStatus" byte to record -chunk/page state. This byte is zeroed when the page is discarded. -Choose this option if you have existing on-NAND data in this format -that you need to continue to support. New data written also uses the -older-style format. -Note: Use of this option generally requires that MTD's oob layout be -adjusted to use the older-style format. See notes on tags formats and -MTD versions in yaffs_mtdif1.c. -*/ -/* Default: Not selected */ -/* Meaning: Use older-style on-NAND data format with pageStatus byte */ -/* #define CONFIG_YAFFS_9BYTE_TAGS */ - -#endif /* YAFFS_OUT_OF_TREE */ - -#endif /* __YAFFS_CONFIG_H__ */ diff --git a/fs/yaffs2/yaffs_allocator.c b/fs/yaffs2/yaffs_allocator.c new file mode 100644 index 00000000000..f9cd5becd8f --- /dev/null +++ b/fs/yaffs2/yaffs_allocator.c @@ -0,0 +1,396 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_allocator.h" +#include "yaffs_guts.h" +#include "yaffs_trace.h" +#include "yportenv.h" + +#ifdef CONFIG_YAFFS_KMALLOC_ALLOCATOR + +void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev) +{ + dev = dev; +} + +void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev) +{ + dev = dev; +} + +struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev) +{ + return (struct yaffs_tnode *)kmalloc(dev->tnode_size, GFP_NOFS); +} + +void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) +{ + dev = dev; + kfree(tn); +} + +void yaffs_init_raw_objs(struct yaffs_dev *dev) +{ + dev = dev; +} + +void yaffs_deinit_raw_objs(struct yaffs_dev *dev) +{ + dev = dev; +} + +struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev) +{ + dev = dev; + return (struct yaffs_obj *)kmalloc(sizeof(struct yaffs_obj)); +} + +void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj) +{ + + dev = dev; + kfree(obj); +} + +#else + +struct yaffs_tnode_list { + struct yaffs_tnode_list *next; + struct yaffs_tnode *tnodes; +}; + +struct yaffs_obj_list { + struct yaffs_obj_list *next; + struct yaffs_obj *objects; +}; + +struct yaffs_allocator { + int n_tnodes_created; + struct yaffs_tnode *free_tnodes; + int n_free_tnodes; + struct yaffs_tnode_list *alloc_tnode_list; + + int n_obj_created; + struct yaffs_obj *free_objs; + int n_free_objects; + + struct yaffs_obj_list *allocated_obj_list; +}; + +static void yaffs_deinit_raw_tnodes(struct yaffs_dev *dev) +{ + + struct yaffs_allocator *allocator = + (struct yaffs_allocator *)dev->allocator; + + struct yaffs_tnode_list *tmp; + + if (!allocator) { + YBUG(); + return; + } + + while (allocator->alloc_tnode_list) { + tmp = allocator->alloc_tnode_list->next; + + kfree(allocator->alloc_tnode_list->tnodes); + kfree(allocator->alloc_tnode_list); + allocator->alloc_tnode_list = tmp; + + } + + allocator->free_tnodes = NULL; + allocator->n_free_tnodes = 0; + allocator->n_tnodes_created = 0; +} + +static void yaffs_init_raw_tnodes(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = dev->allocator; + + if (allocator) { + allocator->alloc_tnode_list = NULL; + allocator->free_tnodes = NULL; + allocator->n_free_tnodes = 0; + allocator->n_tnodes_created = 0; + } else { + YBUG(); + } +} + +static int yaffs_create_tnodes(struct yaffs_dev *dev, int n_tnodes) +{ + struct yaffs_allocator *allocator = + (struct yaffs_allocator *)dev->allocator; + int i; + struct yaffs_tnode *new_tnodes; + u8 *mem; + struct yaffs_tnode *curr; + struct yaffs_tnode *next; + struct yaffs_tnode_list *tnl; + + if (!allocator) { + YBUG(); + return YAFFS_FAIL; + } + + if (n_tnodes < 1) + return YAFFS_OK; + + /* make these things */ + + new_tnodes = kmalloc(n_tnodes * dev->tnode_size, GFP_NOFS); + mem = (u8 *) new_tnodes; + + if (!new_tnodes) { + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs: Could not allocate Tnodes"); + return YAFFS_FAIL; + } + + /* New hookup for wide tnodes */ + for (i = 0; i < n_tnodes - 1; i++) { + curr = (struct yaffs_tnode *)&mem[i * dev->tnode_size]; + next = (struct yaffs_tnode *)&mem[(i + 1) * dev->tnode_size]; + curr->internal[0] = next; + } + + curr = (struct yaffs_tnode *)&mem[(n_tnodes - 1) * dev->tnode_size]; + curr->internal[0] = allocator->free_tnodes; + allocator->free_tnodes = (struct yaffs_tnode *)mem; + + allocator->n_free_tnodes += n_tnodes; + allocator->n_tnodes_created += n_tnodes; + + /* Now add this bunch of tnodes to a list for freeing up. + * NB If we can't add this to the management list it isn't fatal + * but it just means we can't free this bunch of tnodes later. + */ + + tnl = kmalloc(sizeof(struct yaffs_tnode_list), GFP_NOFS); + if (!tnl) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Could not add tnodes to management list"); + return YAFFS_FAIL; + } else { + tnl->tnodes = new_tnodes; + tnl->next = allocator->alloc_tnode_list; + allocator->alloc_tnode_list = tnl; + } + + yaffs_trace(YAFFS_TRACE_ALLOCATE,"Tnodes added"); + + return YAFFS_OK; +} + +struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = + (struct yaffs_allocator *)dev->allocator; + struct yaffs_tnode *tn = NULL; + + if (!allocator) { + YBUG(); + return NULL; + } + + /* If there are none left make more */ + if (!allocator->free_tnodes) + yaffs_create_tnodes(dev, YAFFS_ALLOCATION_NTNODES); + + if (allocator->free_tnodes) { + tn = allocator->free_tnodes; + allocator->free_tnodes = allocator->free_tnodes->internal[0]; + allocator->n_free_tnodes--; + } + + return tn; +} + +/* FreeTnode frees up a tnode and puts it back on the free list */ +void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) +{ + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) { + YBUG(); + return; + } + + if (tn) { + tn->internal[0] = allocator->free_tnodes; + allocator->free_tnodes = tn; + allocator->n_free_tnodes++; + } + dev->checkpoint_blocks_required = 0; /* force recalculation */ +} + +static void yaffs_init_raw_objs(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = dev->allocator; + + if (allocator) { + allocator->allocated_obj_list = NULL; + allocator->free_objs = NULL; + allocator->n_free_objects = 0; + } else { + YBUG(); + } +} + +static void yaffs_deinit_raw_objs(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator = dev->allocator; + struct yaffs_obj_list *tmp; + + if (!allocator) { + YBUG(); + return; + } + + while (allocator->allocated_obj_list) { + tmp = allocator->allocated_obj_list->next; + kfree(allocator->allocated_obj_list->objects); + kfree(allocator->allocated_obj_list); + + allocator->allocated_obj_list = tmp; + } + + allocator->free_objs = NULL; + allocator->n_free_objects = 0; + allocator->n_obj_created = 0; +} + +static int yaffs_create_free_objs(struct yaffs_dev *dev, int n_obj) +{ + struct yaffs_allocator *allocator = dev->allocator; + + int i; + struct yaffs_obj *new_objs; + struct yaffs_obj_list *list; + + if (!allocator) { + YBUG(); + return YAFFS_FAIL; + } + + if (n_obj < 1) + return YAFFS_OK; + + /* make these things */ + new_objs = kmalloc(n_obj * sizeof(struct yaffs_obj), GFP_NOFS); + list = kmalloc(sizeof(struct yaffs_obj_list), GFP_NOFS); + + if (!new_objs || !list) { + if (new_objs) { + kfree(new_objs); + new_objs = NULL; + } + if (list) { + kfree(list); + list = NULL; + } + yaffs_trace(YAFFS_TRACE_ALLOCATE, + "Could not allocate more objects"); + return YAFFS_FAIL; + } + + /* Hook them into the free list */ + for (i = 0; i < n_obj - 1; i++) { + new_objs[i].siblings.next = + (struct list_head *)(&new_objs[i + 1]); + } + + new_objs[n_obj - 1].siblings.next = (void *)allocator->free_objs; + allocator->free_objs = new_objs; + allocator->n_free_objects += n_obj; + allocator->n_obj_created += n_obj; + + /* Now add this bunch of Objects to a list for freeing up. */ + + list->objects = new_objs; + list->next = allocator->allocated_obj_list; + allocator->allocated_obj_list = list; + + return YAFFS_OK; +} + +struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj = NULL; + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) { + YBUG(); + return obj; + } + + /* If there are none left make more */ + if (!allocator->free_objs) + yaffs_create_free_objs(dev, YAFFS_ALLOCATION_NOBJECTS); + + if (allocator->free_objs) { + obj = allocator->free_objs; + allocator->free_objs = + (struct yaffs_obj *)(allocator->free_objs->siblings.next); + allocator->n_free_objects--; + } + + return obj; +} + +void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj) +{ + + struct yaffs_allocator *allocator = dev->allocator; + + if (!allocator) + YBUG(); + else { + /* Link into the free list. */ + obj->siblings.next = (struct list_head *)(allocator->free_objs); + allocator->free_objs = obj; + allocator->n_free_objects++; + } +} + +void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev) +{ + if (dev->allocator) { + yaffs_deinit_raw_tnodes(dev); + yaffs_deinit_raw_objs(dev); + + kfree(dev->allocator); + dev->allocator = NULL; + } else { + YBUG(); + } +} + +void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev) +{ + struct yaffs_allocator *allocator; + + if (!dev->allocator) { + allocator = kmalloc(sizeof(struct yaffs_allocator), GFP_NOFS); + if (allocator) { + dev->allocator = allocator; + yaffs_init_raw_tnodes(dev); + yaffs_init_raw_objs(dev); + } + } else { + YBUG(); + } +} + +#endif diff --git a/fs/yaffs2/yaffs_allocator.h b/fs/yaffs2/yaffs_allocator.h new file mode 100644 index 00000000000..4d5f2aec89f --- /dev/null +++ b/fs/yaffs2/yaffs_allocator.h @@ -0,0 +1,30 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_ALLOCATOR_H__ +#define __YAFFS_ALLOCATOR_H__ + +#include "yaffs_guts.h" + +void yaffs_init_raw_tnodes_and_objs(struct yaffs_dev *dev); +void yaffs_deinit_raw_tnodes_and_objs(struct yaffs_dev *dev); + +struct yaffs_tnode *yaffs_alloc_raw_tnode(struct yaffs_dev *dev); +void yaffs_free_raw_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn); + +struct yaffs_obj *yaffs_alloc_raw_obj(struct yaffs_dev *dev); +void yaffs_free_raw_obj(struct yaffs_dev *dev, struct yaffs_obj *obj); + +#endif diff --git a/fs/yaffs2/yaffs_attribs.c b/fs/yaffs2/yaffs_attribs.c new file mode 100644 index 00000000000..9b47d376310 --- /dev/null +++ b/fs/yaffs2/yaffs_attribs.c @@ -0,0 +1,124 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_guts.h" +#include "yaffs_attribs.h" + +void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh) +{ + obj->yst_uid = oh->yst_uid; + obj->yst_gid = oh->yst_gid; + obj->yst_atime = oh->yst_atime; + obj->yst_mtime = oh->yst_mtime; + obj->yst_ctime = oh->yst_ctime; + obj->yst_rdev = oh->yst_rdev; +} + +void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj) +{ + oh->yst_uid = obj->yst_uid; + oh->yst_gid = obj->yst_gid; + oh->yst_atime = obj->yst_atime; + oh->yst_mtime = obj->yst_mtime; + oh->yst_ctime = obj->yst_ctime; + oh->yst_rdev = obj->yst_rdev; + +} + +void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c) +{ + obj->yst_mtime = Y_CURRENT_TIME; + if (do_a) + obj->yst_atime = obj->yst_mtime; + if (do_c) + obj->yst_ctime = obj->yst_mtime; +} + +void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev) +{ + yaffs_load_current_time(obj, 1, 1); + obj->yst_rdev = rdev; + obj->yst_uid = uid; + obj->yst_gid = gid; +} + +loff_t yaffs_get_file_size(struct yaffs_obj *obj) +{ + YCHAR *alias = NULL; + obj = yaffs_get_equivalent_obj(obj); + + switch (obj->variant_type) { + case YAFFS_OBJECT_TYPE_FILE: + return obj->variant.file_variant.file_size; + case YAFFS_OBJECT_TYPE_SYMLINK: + alias = obj->variant.symlink_variant.alias; + if (!alias) + return 0; + return strnlen(alias, YAFFS_MAX_ALIAS_LENGTH); + default: + return 0; + } +} + +int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr) +{ + unsigned int valid = attr->ia_valid; + + if (valid & ATTR_MODE) + obj->yst_mode = attr->ia_mode; + if (valid & ATTR_UID) + obj->yst_uid = attr->ia_uid; + if (valid & ATTR_GID) + obj->yst_gid = attr->ia_gid; + + if (valid & ATTR_ATIME) + obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); + if (valid & ATTR_CTIME) + obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); + if (valid & ATTR_MTIME) + obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); + + if (valid & ATTR_SIZE) + yaffs_resize_file(obj, attr->ia_size); + + yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); + + return YAFFS_OK; + +} + +int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr) +{ + unsigned int valid = 0; + + attr->ia_mode = obj->yst_mode; + valid |= ATTR_MODE; + attr->ia_uid = obj->yst_uid; + valid |= ATTR_UID; + attr->ia_gid = obj->yst_gid; + valid |= ATTR_GID; + + Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; + valid |= ATTR_ATIME; + Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; + valid |= ATTR_CTIME; + Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; + valid |= ATTR_MTIME; + + attr->ia_size = yaffs_get_file_size(obj); + valid |= ATTR_SIZE; + + attr->ia_valid = valid; + + return YAFFS_OK; +} diff --git a/fs/yaffs2/yaffs_attribs.h b/fs/yaffs2/yaffs_attribs.h new file mode 100644 index 00000000000..33d541d6944 --- /dev/null +++ b/fs/yaffs2/yaffs_attribs.h @@ -0,0 +1,28 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_ATTRIBS_H__ +#define __YAFFS_ATTRIBS_H__ + +#include "yaffs_guts.h" + +void yaffs_load_attribs(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh); +void yaffs_load_attribs_oh(struct yaffs_obj_hdr *oh, struct yaffs_obj *obj); +void yaffs_attribs_init(struct yaffs_obj *obj, u32 gid, u32 uid, u32 rdev); +void yaffs_load_current_time(struct yaffs_obj *obj, int do_a, int do_c); +int yaffs_set_attribs(struct yaffs_obj *obj, struct iattr *attr); +int yaffs_get_attribs(struct yaffs_obj *obj, struct iattr *attr); + +#endif diff --git a/fs/yaffs2/yaffs_bitmap.c b/fs/yaffs2/yaffs_bitmap.c new file mode 100644 index 00000000000..7df42cd0066 --- /dev/null +++ b/fs/yaffs2/yaffs_bitmap.c @@ -0,0 +1,98 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_bitmap.h" +#include "yaffs_trace.h" +/* + * Chunk bitmap manipulations + */ + +static inline u8 *yaffs_block_bits(struct yaffs_dev *dev, int blk) +{ + if (blk < dev->internal_start_block || blk > dev->internal_end_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "BlockBits block %d is not valid", + blk); + YBUG(); + } + return dev->chunk_bits + + (dev->chunk_bit_stride * (blk - dev->internal_start_block)); +} + +void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk) +{ + if (blk < dev->internal_start_block || blk > dev->internal_end_block || + chunk < 0 || chunk >= dev->param.chunks_per_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Chunk Id (%d:%d) invalid", + blk, chunk); + YBUG(); + } +} + +void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + + memset(blk_bits, 0, dev->chunk_bit_stride); +} + +void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + + yaffs_verify_chunk_bit_id(dev, blk, chunk); + + blk_bits[chunk / 8] &= ~(1 << (chunk & 7)); +} + +void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + + yaffs_verify_chunk_bit_id(dev, blk, chunk); + + blk_bits[chunk / 8] |= (1 << (chunk & 7)); +} + +int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + yaffs_verify_chunk_bit_id(dev, blk, chunk); + + return (blk_bits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; +} + +int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + int i; + for (i = 0; i < dev->chunk_bit_stride; i++) { + if (*blk_bits) + return 1; + blk_bits++; + } + return 0; +} + +int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk) +{ + u8 *blk_bits = yaffs_block_bits(dev, blk); + int i; + int n = 0; + + for (i = 0; i < dev->chunk_bit_stride; i++, blk_bits++) + n += hweight8(*blk_bits); + + return n; +} diff --git a/fs/yaffs2/yaffs_bitmap.h b/fs/yaffs2/yaffs_bitmap.h new file mode 100644 index 00000000000..cf9ea58da0d --- /dev/null +++ b/fs/yaffs2/yaffs_bitmap.h @@ -0,0 +1,33 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +/* + * Chunk bitmap manipulations + */ + +#ifndef __YAFFS_BITMAP_H__ +#define __YAFFS_BITMAP_H__ + +#include "yaffs_guts.h" + +void yaffs_verify_chunk_bit_id(struct yaffs_dev *dev, int blk, int chunk); +void yaffs_clear_chunk_bits(struct yaffs_dev *dev, int blk); +void yaffs_clear_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); +void yaffs_set_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); +int yaffs_check_chunk_bit(struct yaffs_dev *dev, int blk, int chunk); +int yaffs_still_some_chunks(struct yaffs_dev *dev, int blk); +int yaffs_count_chunk_bits(struct yaffs_dev *dev, int blk); + +#endif diff --git a/fs/yaffs2/yaffs_checkptrw.c b/fs/yaffs2/yaffs_checkptrw.c index 1304c19c185..4e40f437e65 100644 --- a/fs/yaffs2/yaffs_checkptrw.c +++ b/fs/yaffs2/yaffs_checkptrw.c @@ -14,388 +14,402 @@ #include "yaffs_checkptrw.h" #include "yaffs_getblockinfo.h" -static int yaffs_CheckpointSpaceOk(yaffs_Device *dev) +static int yaffs2_checkpt_space_ok(struct yaffs_dev *dev) { - int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks; + int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; - T(YAFFS_TRACE_CHECKPOINT, - (TSTR("checkpt blocks available = %d" TENDSTR), - blocksAvailable)); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checkpt blocks_avail = %d", blocks_avail); - return (blocksAvailable <= 0) ? 0 : 1; + return (blocks_avail <= 0) ? 0 : 1; } - -static int yaffs_CheckpointErase(yaffs_Device *dev) +static int yaffs_checkpt_erase(struct yaffs_dev *dev) { int i; - if (!dev->param.eraseBlockInNAND) + if (!dev->param.erase_fn) return 0; - T(YAFFS_TRACE_CHECKPOINT, (TSTR("checking blocks %d to %d"TENDSTR), - dev->internalStartBlock, dev->internalEndBlock)); - - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i); - if (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("erasing checkpt block %d"TENDSTR), i)); - - dev->nBlockErasures++; - - if (dev->param.eraseBlockInNAND(dev, i - dev->blockOffset /* realign */)) { - bi->blockState = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - dev->nFreeChunks += dev->param.nChunksPerBlock; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checking blocks %d to %d", + dev->internal_start_block, dev->internal_end_block); + + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); + if (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "erasing checkpt block %d", i); + + dev->n_erasures++; + + if (dev->param. + erase_fn(dev, + i - dev->block_offset /* realign */ )) { + bi->block_state = YAFFS_BLOCK_STATE_EMPTY; + dev->n_erased_blocks++; + dev->n_free_chunks += + dev->param.chunks_per_block; } else { - dev->param.markNANDBlockBad(dev, i); - bi->blockState = YAFFS_BLOCK_STATE_DEAD; + dev->param.bad_block_fn(dev, i); + bi->block_state = YAFFS_BLOCK_STATE_DEAD; } } } - dev->blocksInCheckpoint = 0; + dev->blocks_in_checkpt = 0; return 1; } - -static void yaffs_CheckpointFindNextErasedBlock(yaffs_Device *dev) +static void yaffs2_checkpt_find_erased_block(struct yaffs_dev *dev) { - int i; - int blocksAvailable = dev->nErasedBlocks - dev->param.nReservedBlocks; - T(YAFFS_TRACE_CHECKPOINT, - (TSTR("allocating checkpt block: erased %d reserved %d avail %d next %d "TENDSTR), - dev->nErasedBlocks, dev->param.nReservedBlocks, blocksAvailable, dev->checkpointNextBlock)); - - if (dev->checkpointNextBlock >= 0 && - dev->checkpointNextBlock <= dev->internalEndBlock && - blocksAvailable > 0) { - - for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i); - if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { - dev->checkpointNextBlock = i + 1; - dev->checkpointCurrentBlock = i; - T(YAFFS_TRACE_CHECKPOINT, (TSTR("allocating checkpt block %d"TENDSTR), i)); + int i; + int blocks_avail = dev->n_erased_blocks - dev->param.n_reserved_blocks; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "allocating checkpt block: erased %d reserved %d avail %d next %d ", + dev->n_erased_blocks, dev->param.n_reserved_blocks, + blocks_avail, dev->checkpt_next_block); + + if (dev->checkpt_next_block >= 0 && + dev->checkpt_next_block <= dev->internal_end_block && + blocks_avail > 0) { + + for (i = dev->checkpt_next_block; i <= dev->internal_end_block; + i++) { + struct yaffs_block_info *bi = + yaffs_get_block_info(dev, i); + if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { + dev->checkpt_next_block = i + 1; + dev->checkpt_cur_block = i; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "allocating checkpt block %d", i); return; } } } - T(YAFFS_TRACE_CHECKPOINT, (TSTR("out of checkpt blocks"TENDSTR))); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, "out of checkpt blocks"); - dev->checkpointNextBlock = -1; - dev->checkpointCurrentBlock = -1; + dev->checkpt_next_block = -1; + dev->checkpt_cur_block = -1; } -static void yaffs_CheckpointFindNextCheckpointBlock(yaffs_Device *dev) +static void yaffs2_checkpt_find_block(struct yaffs_dev *dev) { - int i; - yaffs_ExtendedTags tags; - - T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: start: blocks %d next %d" TENDSTR), - dev->blocksInCheckpoint, dev->checkpointNextBlock)); - - if (dev->blocksInCheckpoint < dev->checkpointMaxBlocks) - for (i = dev->checkpointNextBlock; i <= dev->internalEndBlock; i++) { - int chunk = i * dev->param.nChunksPerBlock; - int realignedChunk = chunk - dev->chunkOffset; - - dev->param.readChunkWithTagsFromNAND(dev, realignedChunk, - NULL, &tags); - T(YAFFS_TRACE_CHECKPOINT, (TSTR("find next checkpt block: search: block %d oid %d seq %d eccr %d" TENDSTR), - i, tags.objectId, tags.sequenceNumber, tags.eccResult)); - - if (tags.sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) { + int i; + struct yaffs_ext_tags tags; + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "find next checkpt block: start: blocks %d next %d", + dev->blocks_in_checkpt, dev->checkpt_next_block); + + if (dev->blocks_in_checkpt < dev->checkpt_max_blocks) + for (i = dev->checkpt_next_block; i <= dev->internal_end_block; + i++) { + int chunk = i * dev->param.chunks_per_block; + int realigned_chunk = chunk - dev->chunk_offset; + + dev->param.read_chunk_tags_fn(dev, realigned_chunk, + NULL, &tags); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "find next checkpt block: search: block %d oid %d seq %d eccr %d", + i, tags.obj_id, tags.seq_number, + tags.ecc_result); + + if (tags.seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) { /* Right kind of block */ - dev->checkpointNextBlock = tags.objectId; - dev->checkpointCurrentBlock = i; - dev->checkpointBlockList[dev->blocksInCheckpoint] = i; - dev->blocksInCheckpoint++; - T(YAFFS_TRACE_CHECKPOINT, (TSTR("found checkpt block %d"TENDSTR), i)); + dev->checkpt_next_block = tags.obj_id; + dev->checkpt_cur_block = i; + dev->checkpt_block_list[dev-> + blocks_in_checkpt] = i; + dev->blocks_in_checkpt++; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "found checkpt block %d", i); return; } } - T(YAFFS_TRACE_CHECKPOINT, (TSTR("found no more checkpt blocks"TENDSTR))); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, "found no more checkpt blocks"); - dev->checkpointNextBlock = -1; - dev->checkpointCurrentBlock = -1; + dev->checkpt_next_block = -1; + dev->checkpt_cur_block = -1; } - -int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting) +int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing) { - - dev->checkpointOpenForWrite = forWriting; + dev->checkpt_open_write = writing; /* Got the functions we need? */ - if (!dev->param.writeChunkWithTagsToNAND || - !dev->param.readChunkWithTagsFromNAND || - !dev->param.eraseBlockInNAND || - !dev->param.markNANDBlockBad) + if (!dev->param.write_chunk_tags_fn || + !dev->param.read_chunk_tags_fn || + !dev->param.erase_fn || !dev->param.bad_block_fn) return 0; - if (forWriting && !yaffs_CheckpointSpaceOk(dev)) + if (writing && !yaffs2_checkpt_space_ok(dev)) return 0; - if (!dev->checkpointBuffer) - dev->checkpointBuffer = YMALLOC_DMA(dev->param.totalBytesPerChunk); - if (!dev->checkpointBuffer) + if (!dev->checkpt_buffer) + dev->checkpt_buffer = + kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); + if (!dev->checkpt_buffer) return 0; - - dev->checkpointPageSequence = 0; - dev->checkpointByteCount = 0; - dev->checkpointSum = 0; - dev->checkpointXor = 0; - dev->checkpointCurrentBlock = -1; - dev->checkpointCurrentChunk = -1; - dev->checkpointNextBlock = dev->internalStartBlock; + dev->checkpt_page_seq = 0; + dev->checkpt_byte_count = 0; + dev->checkpt_sum = 0; + dev->checkpt_xor = 0; + dev->checkpt_cur_block = -1; + dev->checkpt_cur_chunk = -1; + dev->checkpt_next_block = dev->internal_start_block; /* Erase all the blocks in the checkpoint area */ - if (forWriting) { - memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk); - dev->checkpointByteOffset = 0; - return yaffs_CheckpointErase(dev); + if (writing) { + memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); + dev->checkpt_byte_offs = 0; + return yaffs_checkpt_erase(dev); } else { int i; /* Set to a value that will kick off a read */ - dev->checkpointByteOffset = dev->nDataBytesPerChunk; + dev->checkpt_byte_offs = dev->data_bytes_per_chunk; /* A checkpoint block list of 1 checkpoint block per 16 block is (hopefully) * going to be way more than we need */ - dev->blocksInCheckpoint = 0; - dev->checkpointMaxBlocks = (dev->internalEndBlock - dev->internalStartBlock)/16 + 2; - dev->checkpointBlockList = YMALLOC(sizeof(int) * dev->checkpointMaxBlocks); - if(!dev->checkpointBlockList) + dev->blocks_in_checkpt = 0; + dev->checkpt_max_blocks = + (dev->internal_end_block - dev->internal_start_block) / 16 + + 2; + dev->checkpt_block_list = + kmalloc(sizeof(int) * dev->checkpt_max_blocks, GFP_NOFS); + if (!dev->checkpt_block_list) return 0; - for (i = 0; i < dev->checkpointMaxBlocks; i++) - dev->checkpointBlockList[i] = -1; + for (i = 0; i < dev->checkpt_max_blocks; i++) + dev->checkpt_block_list[i] = -1; } return 1; } -int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum) +int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum) { - __u32 compositeSum; - compositeSum = (dev->checkpointSum << 8) | (dev->checkpointXor & 0xFF); - *sum = compositeSum; + u32 composite_sum; + composite_sum = (dev->checkpt_sum << 8) | (dev->checkpt_xor & 0xFF); + *sum = composite_sum; return 1; } -static int yaffs_CheckpointFlushBuffer(yaffs_Device *dev) +static int yaffs2_checkpt_flush_buffer(struct yaffs_dev *dev) { int chunk; - int realignedChunk; + int realigned_chunk; - yaffs_ExtendedTags tags; + struct yaffs_ext_tags tags; - if (dev->checkpointCurrentBlock < 0) { - yaffs_CheckpointFindNextErasedBlock(dev); - dev->checkpointCurrentChunk = 0; + if (dev->checkpt_cur_block < 0) { + yaffs2_checkpt_find_erased_block(dev); + dev->checkpt_cur_chunk = 0; } - if (dev->checkpointCurrentBlock < 0) + if (dev->checkpt_cur_block < 0) return 0; - tags.chunkDeleted = 0; - tags.objectId = dev->checkpointNextBlock; /* Hint to next place to look */ - tags.chunkId = dev->checkpointPageSequence + 1; - tags.sequenceNumber = YAFFS_SEQUENCE_CHECKPOINT_DATA; - tags.byteCount = dev->nDataBytesPerChunk; - if (dev->checkpointCurrentChunk == 0) { + tags.is_deleted = 0; + tags.obj_id = dev->checkpt_next_block; /* Hint to next place to look */ + tags.chunk_id = dev->checkpt_page_seq + 1; + tags.seq_number = YAFFS_SEQUENCE_CHECKPOINT_DATA; + tags.n_bytes = dev->data_bytes_per_chunk; + if (dev->checkpt_cur_chunk == 0) { /* First chunk we write for the block? Set block state to checkpoint */ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->checkpointCurrentBlock); - bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; - dev->blocksInCheckpoint++; + struct yaffs_block_info *bi = + yaffs_get_block_info(dev, dev->checkpt_cur_block); + bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; + dev->blocks_in_checkpt++; } - chunk = dev->checkpointCurrentBlock * dev->param.nChunksPerBlock + dev->checkpointCurrentChunk; - + chunk = + dev->checkpt_cur_block * dev->param.chunks_per_block + + dev->checkpt_cur_chunk; - T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint wite buffer nand %d(%d:%d) objid %d chId %d" TENDSTR), - chunk, dev->checkpointCurrentBlock, dev->checkpointCurrentChunk, tags.objectId, tags.chunkId)); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checkpoint wite buffer nand %d(%d:%d) objid %d chId %d", + chunk, dev->checkpt_cur_block, dev->checkpt_cur_chunk, + tags.obj_id, tags.chunk_id); - realignedChunk = chunk - dev->chunkOffset; + realigned_chunk = chunk - dev->chunk_offset; - dev->nPageWrites++; + dev->n_page_writes++; - dev->param.writeChunkWithTagsToNAND(dev, realignedChunk, - dev->checkpointBuffer, &tags); - dev->checkpointByteOffset = 0; - dev->checkpointPageSequence++; - dev->checkpointCurrentChunk++; - if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock) { - dev->checkpointCurrentChunk = 0; - dev->checkpointCurrentBlock = -1; + dev->param.write_chunk_tags_fn(dev, realigned_chunk, + dev->checkpt_buffer, &tags); + dev->checkpt_byte_offs = 0; + dev->checkpt_page_seq++; + dev->checkpt_cur_chunk++; + if (dev->checkpt_cur_chunk >= dev->param.chunks_per_block) { + dev->checkpt_cur_chunk = 0; + dev->checkpt_cur_block = -1; } - memset(dev->checkpointBuffer, 0, dev->nDataBytesPerChunk); + memset(dev->checkpt_buffer, 0, dev->data_bytes_per_chunk); return 1; } - -int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes) +int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes) { int i = 0; int ok = 1; + u8 *data_bytes = (u8 *) data; - __u8 * dataBytes = (__u8 *)data; - - - - if (!dev->checkpointBuffer) + if (!dev->checkpt_buffer) return 0; - if (!dev->checkpointOpenForWrite) + if (!dev->checkpt_open_write) return -1; - while (i < nBytes && ok) { - dev->checkpointBuffer[dev->checkpointByteOffset] = *dataBytes; - dev->checkpointSum += *dataBytes; - dev->checkpointXor ^= *dataBytes; + while (i < n_bytes && ok) { + dev->checkpt_buffer[dev->checkpt_byte_offs] = *data_bytes; + dev->checkpt_sum += *data_bytes; + dev->checkpt_xor ^= *data_bytes; - dev->checkpointByteOffset++; + dev->checkpt_byte_offs++; i++; - dataBytes++; - dev->checkpointByteCount++; + data_bytes++; + dev->checkpt_byte_count++; - - if (dev->checkpointByteOffset < 0 || - dev->checkpointByteOffset >= dev->nDataBytesPerChunk) - ok = yaffs_CheckpointFlushBuffer(dev); + if (dev->checkpt_byte_offs < 0 || + dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) + ok = yaffs2_checkpt_flush_buffer(dev); } return i; } -int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes) +int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes) { int i = 0; int ok = 1; - yaffs_ExtendedTags tags; - + struct yaffs_ext_tags tags; int chunk; - int realignedChunk; + int realigned_chunk; - __u8 *dataBytes = (__u8 *)data; + u8 *data_bytes = (u8 *) data; - if (!dev->checkpointBuffer) + if (!dev->checkpt_buffer) return 0; - if (dev->checkpointOpenForWrite) + if (dev->checkpt_open_write) return -1; - while (i < nBytes && ok) { - + while (i < n_bytes && ok) { - if (dev->checkpointByteOffset < 0 || - dev->checkpointByteOffset >= dev->nDataBytesPerChunk) { + if (dev->checkpt_byte_offs < 0 || + dev->checkpt_byte_offs >= dev->data_bytes_per_chunk) { - if (dev->checkpointCurrentBlock < 0) { - yaffs_CheckpointFindNextCheckpointBlock(dev); - dev->checkpointCurrentChunk = 0; + if (dev->checkpt_cur_block < 0) { + yaffs2_checkpt_find_block(dev); + dev->checkpt_cur_chunk = 0; } - if (dev->checkpointCurrentBlock < 0) + if (dev->checkpt_cur_block < 0) ok = 0; else { - chunk = dev->checkpointCurrentBlock * - dev->param.nChunksPerBlock + - dev->checkpointCurrentChunk; + chunk = dev->checkpt_cur_block * + dev->param.chunks_per_block + + dev->checkpt_cur_chunk; - realignedChunk = chunk - dev->chunkOffset; - - dev->nPageReads++; + realigned_chunk = chunk - dev->chunk_offset; + + dev->n_page_reads++; /* read in the next chunk */ - /* printf("read checkpoint page %d\n",dev->checkpointPage); */ - dev->param.readChunkWithTagsFromNAND(dev, - realignedChunk, - dev->checkpointBuffer, - &tags); - - if (tags.chunkId != (dev->checkpointPageSequence + 1) || - tags.eccResult > YAFFS_ECC_RESULT_FIXED || - tags.sequenceNumber != YAFFS_SEQUENCE_CHECKPOINT_DATA) + dev->param.read_chunk_tags_fn(dev, + realigned_chunk, + dev-> + checkpt_buffer, + &tags); + + if (tags.chunk_id != (dev->checkpt_page_seq + 1) + || tags.ecc_result > YAFFS_ECC_RESULT_FIXED + || tags.seq_number != + YAFFS_SEQUENCE_CHECKPOINT_DATA) ok = 0; - dev->checkpointByteOffset = 0; - dev->checkpointPageSequence++; - dev->checkpointCurrentChunk++; + dev->checkpt_byte_offs = 0; + dev->checkpt_page_seq++; + dev->checkpt_cur_chunk++; - if (dev->checkpointCurrentChunk >= dev->param.nChunksPerBlock) - dev->checkpointCurrentBlock = -1; + if (dev->checkpt_cur_chunk >= + dev->param.chunks_per_block) + dev->checkpt_cur_block = -1; } } if (ok) { - *dataBytes = dev->checkpointBuffer[dev->checkpointByteOffset]; - dev->checkpointSum += *dataBytes; - dev->checkpointXor ^= *dataBytes; - dev->checkpointByteOffset++; + *data_bytes = + dev->checkpt_buffer[dev->checkpt_byte_offs]; + dev->checkpt_sum += *data_bytes; + dev->checkpt_xor ^= *data_bytes; + dev->checkpt_byte_offs++; i++; - dataBytes++; - dev->checkpointByteCount++; + data_bytes++; + dev->checkpt_byte_count++; } } - return i; + return i; } -int yaffs_CheckpointClose(yaffs_Device *dev) +int yaffs_checkpt_close(struct yaffs_dev *dev) { - if (dev->checkpointOpenForWrite) { - if (dev->checkpointByteOffset != 0) - yaffs_CheckpointFlushBuffer(dev); - } else if(dev->checkpointBlockList){ + if (dev->checkpt_open_write) { + if (dev->checkpt_byte_offs != 0) + yaffs2_checkpt_flush_buffer(dev); + } else if (dev->checkpt_block_list) { int i; - for (i = 0; i < dev->blocksInCheckpoint && dev->checkpointBlockList[i] >= 0; i++) { - int blk = dev->checkpointBlockList[i]; - yaffs_BlockInfo *bi = NULL; - if( dev->internalStartBlock <= blk && blk <= dev->internalEndBlock) - bi = yaffs_GetBlockInfo(dev, blk); - if (bi && bi->blockState == YAFFS_BLOCK_STATE_EMPTY) - bi->blockState = YAFFS_BLOCK_STATE_CHECKPOINT; + for (i = 0; + i < dev->blocks_in_checkpt + && dev->checkpt_block_list[i] >= 0; i++) { + int blk = dev->checkpt_block_list[i]; + struct yaffs_block_info *bi = NULL; + if (dev->internal_start_block <= blk + && blk <= dev->internal_end_block) + bi = yaffs_get_block_info(dev, blk); + if (bi && bi->block_state == YAFFS_BLOCK_STATE_EMPTY) + bi->block_state = YAFFS_BLOCK_STATE_CHECKPOINT; else { /* Todo this looks odd... */ } } - YFREE(dev->checkpointBlockList); - dev->checkpointBlockList = NULL; + kfree(dev->checkpt_block_list); + dev->checkpt_block_list = NULL; } - dev->nFreeChunks -= dev->blocksInCheckpoint * dev->param.nChunksPerBlock; - dev->nErasedBlocks -= dev->blocksInCheckpoint; + dev->n_free_chunks -= + dev->blocks_in_checkpt * dev->param.chunks_per_block; + dev->n_erased_blocks -= dev->blocks_in_checkpt; + yaffs_trace(YAFFS_TRACE_CHECKPOINT,"checkpoint byte count %d", + dev->checkpt_byte_count); - T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint byte count %d" TENDSTR), - dev->checkpointByteCount)); - - if (dev->checkpointBuffer) { + if (dev->checkpt_buffer) { /* free the buffer */ - YFREE(dev->checkpointBuffer); - dev->checkpointBuffer = NULL; + kfree(dev->checkpt_buffer); + dev->checkpt_buffer = NULL; return 1; - } else + } else { return 0; + } } -int yaffs_CheckpointInvalidateStream(yaffs_Device *dev) +int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev) { /* Erase the checkpoint data */ - T(YAFFS_TRACE_CHECKPOINT, (TSTR("checkpoint invalidate of %d blocks"TENDSTR), - dev->blocksInCheckpoint)); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "checkpoint invalidate of %d blocks", + dev->blocks_in_checkpt); - return yaffs_CheckpointErase(dev); + return yaffs_checkpt_erase(dev); } - - - diff --git a/fs/yaffs2/yaffs_checkptrw.h b/fs/yaffs2/yaffs_checkptrw.h index 881c3659c8a..361c6067717 100644 --- a/fs/yaffs2/yaffs_checkptrw.h +++ b/fs/yaffs2/yaffs_checkptrw.h @@ -18,17 +18,16 @@ #include "yaffs_guts.h" -int yaffs_CheckpointOpen(yaffs_Device *dev, int forWriting); +int yaffs2_checkpt_open(struct yaffs_dev *dev, int writing); -int yaffs_CheckpointWrite(yaffs_Device *dev, const void *data, int nBytes); +int yaffs2_checkpt_wr(struct yaffs_dev *dev, const void *data, int n_bytes); -int yaffs_CheckpointRead(yaffs_Device *dev, void *data, int nBytes); +int yaffs2_checkpt_rd(struct yaffs_dev *dev, void *data, int n_bytes); -int yaffs_GetCheckpointSum(yaffs_Device *dev, __u32 *sum); +int yaffs2_get_checkpt_sum(struct yaffs_dev *dev, u32 * sum); -int yaffs_CheckpointClose(yaffs_Device *dev); - -int yaffs_CheckpointInvalidateStream(yaffs_Device *dev); +int yaffs_checkpt_close(struct yaffs_dev *dev); +int yaffs2_checkpt_invalidate_stream(struct yaffs_dev *dev); #endif diff --git a/fs/yaffs2/yaffs_ecc.c b/fs/yaffs2/yaffs_ecc.c index da6145aac27..e95a8069a8c 100644 --- a/fs/yaffs2/yaffs_ecc.c +++ b/fs/yaffs2/yaffs_ecc.c @@ -67,32 +67,9 @@ static const unsigned char column_parity_table[] = { 0x69, 0x3c, 0x30, 0x65, 0x0c, 0x59, 0x55, 0x00, }; -/* Count the bits in an unsigned char or a U32 */ - -static int yaffs_CountBits(unsigned char x) -{ - int r = 0; - while (x) { - if (x & 1) - r++; - x >>= 1; - } - return r; -} - -static int yaffs_CountBits32(unsigned x) -{ - int r = 0; - while (x) { - if (x & 1) - r++; - x >>= 1; - } - return r; -} /* Calculate the ECC for a 256-byte block of data */ -void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) +void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc) { unsigned int i; @@ -106,7 +83,7 @@ void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) b = column_parity_table[*data++]; col_parity ^= b; - if (b & 0x01) { /* odd number of bits in the byte */ + if (b & 0x01) { /* odd number of bits in the byte */ line_parity ^= i; line_parity_prime ^= ~i; } @@ -160,11 +137,10 @@ void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc) #endif } - /* Correct the ECC on a 256 byte block of data */ -int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc) +int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, + const unsigned char *test_ecc) { unsigned char d0, d1, d2; /* deltas */ @@ -173,7 +149,7 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, d2 = read_ecc[2] ^ test_ecc[2]; if ((d0 | d1 | d2) == 0) - return 0; /* no error */ + return 0; /* no error */ if (((d0 ^ (d0 >> 1)) & 0x55) == 0x55 && ((d1 ^ (d1 >> 1)) & 0x55) == 0x55 && @@ -220,19 +196,17 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, data[byte] ^= (1 << bit); - return 1; /* Corrected the error */ + return 1; /* Corrected the error */ } - if ((yaffs_CountBits(d0) + - yaffs_CountBits(d1) + - yaffs_CountBits(d2)) == 1) { + if ((hweight8(d0) + hweight8(d1) + hweight8(d2)) == 1) { /* Reccoverable error in ecc */ read_ecc[0] = test_ecc[0]; read_ecc[1] = test_ecc[1]; read_ecc[2] = test_ecc[2]; - return 1; /* Corrected the error */ + return 1; /* Corrected the error */ } /* Unrecoverable error */ @@ -241,12 +215,11 @@ int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, } - /* * ECCxxxOther does ECC calcs on arbitrary n bytes of data */ -void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, - yaffs_ECCOther *eccOther) +void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *ecc_other) { unsigned int i; @@ -255,11 +228,11 @@ void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, unsigned line_parity_prime = 0; unsigned char b; - for (i = 0; i < nBytes; i++) { + for (i = 0; i < n_bytes; i++) { b = column_parity_table[*data++]; col_parity ^= b; - if (b & 0x01) { + if (b & 0x01) { /* odd number of bits in the byte */ line_parity ^= i; line_parity_prime ^= ~i; @@ -267,54 +240,56 @@ void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, } - eccOther->colParity = (col_parity >> 2) & 0x3f; - eccOther->lineParity = line_parity; - eccOther->lineParityPrime = line_parity_prime; + ecc_other->col_parity = (col_parity >> 2) & 0x3f; + ecc_other->line_parity = line_parity; + ecc_other->line_parity_prime = line_parity_prime; } -int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, - yaffs_ECCOther *read_ecc, - const yaffs_ECCOther *test_ecc) +int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *read_ecc, + const struct yaffs_ecc_other *test_ecc) { - unsigned char cDelta; /* column parity delta */ - unsigned lDelta; /* line parity delta */ - unsigned lDeltaPrime; /* line parity delta */ + unsigned char delta_col; /* column parity delta */ + unsigned delta_line; /* line parity delta */ + unsigned delta_line_prime; /* line parity delta */ unsigned bit; - cDelta = read_ecc->colParity ^ test_ecc->colParity; - lDelta = read_ecc->lineParity ^ test_ecc->lineParity; - lDeltaPrime = read_ecc->lineParityPrime ^ test_ecc->lineParityPrime; + delta_col = read_ecc->col_parity ^ test_ecc->col_parity; + delta_line = read_ecc->line_parity ^ test_ecc->line_parity; + delta_line_prime = + read_ecc->line_parity_prime ^ test_ecc->line_parity_prime; - if ((cDelta | lDelta | lDeltaPrime) == 0) - return 0; /* no error */ + if ((delta_col | delta_line | delta_line_prime) == 0) + return 0; /* no error */ - if (lDelta == ~lDeltaPrime && - (((cDelta ^ (cDelta >> 1)) & 0x15) == 0x15)) { + if (delta_line == ~delta_line_prime && + (((delta_col ^ (delta_col >> 1)) & 0x15) == 0x15)) { /* Single bit (recoverable) error in data */ bit = 0; - if (cDelta & 0x20) + if (delta_col & 0x20) bit |= 0x04; - if (cDelta & 0x08) + if (delta_col & 0x08) bit |= 0x02; - if (cDelta & 0x02) + if (delta_col & 0x02) bit |= 0x01; - if (lDelta >= nBytes) + if (delta_line >= n_bytes) return -1; - data[lDelta] ^= (1 << bit); + data[delta_line] ^= (1 << bit); - return 1; /* corrected */ + return 1; /* corrected */ } - if ((yaffs_CountBits32(lDelta) + yaffs_CountBits32(lDeltaPrime) + - yaffs_CountBits(cDelta)) == 1) { + if ((hweight32(delta_line) + + hweight32(delta_line_prime) + + hweight8(delta_col)) == 1) { /* Reccoverable error in ecc */ *read_ecc = *test_ecc; - return 1; /* corrected */ + return 1; /* corrected */ } /* Unrecoverable error */ diff --git a/fs/yaffs2/yaffs_ecc.h b/fs/yaffs2/yaffs_ecc.h index a1ee69ac7f2..b0c461d699e 100644 --- a/fs/yaffs2/yaffs_ecc.h +++ b/fs/yaffs2/yaffs_ecc.h @@ -26,19 +26,19 @@ #ifndef __YAFFS_ECC_H__ #define __YAFFS_ECC_H__ -typedef struct { - unsigned char colParity; - unsigned lineParity; - unsigned lineParityPrime; -} yaffs_ECCOther; +struct yaffs_ecc_other { + unsigned char col_parity; + unsigned line_parity; + unsigned line_parity_prime; +}; -void yaffs_ECCCalculate(const unsigned char *data, unsigned char *ecc); -int yaffs_ECCCorrect(unsigned char *data, unsigned char *read_ecc, - const unsigned char *test_ecc); +void yaffs_ecc_cacl(const unsigned char *data, unsigned char *ecc); +int yaffs_ecc_correct(unsigned char *data, unsigned char *read_ecc, + const unsigned char *test_ecc); -void yaffs_ECCCalculateOther(const unsigned char *data, unsigned nBytes, - yaffs_ECCOther *ecc); -int yaffs_ECCCorrectOther(unsigned char *data, unsigned nBytes, - yaffs_ECCOther *read_ecc, - const yaffs_ECCOther *test_ecc); +void yaffs_ecc_calc_other(const unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *ecc); +int yaffs_ecc_correct_other(unsigned char *data, unsigned n_bytes, + struct yaffs_ecc_other *read_ecc, + const struct yaffs_ecc_other *test_ecc); #endif diff --git a/fs/yaffs2/yaffs_fs.c b/fs/yaffs2/yaffs_fs.c deleted file mode 100644 index 11eca48d064..00000000000 --- a/fs/yaffs2/yaffs_fs.c +++ /dev/null @@ -1,3279 +0,0 @@ -/* - * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * Acknowledgements: - * Luc van OostenRyck for numerous patches. - * Nick Bane for numerous patches. - * Nick Bane for 2.5/2.6 integration. - * Andras Toth for mknod rdev issue. - * Michael Fischer for finding the problem with inode inconsistency. - * Some code bodily lifted from JFFS - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License version 2 as - * published by the Free Software Foundation. - */ - -/* - * - * This is the file system front-end to YAFFS that hooks it up to - * the VFS. - * - * Special notes: - * >> 2.4: sb->u.generic_sbp points to the yaffs_Device associated with - * this superblock - * >> 2.6: sb->s_fs_info points to the yaffs_Device associated with this - * superblock - * >> inode->u.generic_ip points to the associated yaffs_Object. - */ - -#include <linux/version.h> - -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 10)) -#define YAFFS_COMPILE_BACKGROUND -#endif - -#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,28)) -#define YAFFS_COMPILE_EXPORTFS -#endif - - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) -#include <linux/config.h> -#endif - -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/slab.h> -#include <linux/init.h> -#include <linux/fs.h> -#include <linux/proc_fs.h> -#include <linux/smp_lock.h> -#include <linux/pagemap.h> -#include <linux/mtd/mtd.h> -#include <linux/interrupt.h> -#include <linux/string.h> -#include <linux/ctype.h> - -#ifdef YAFFS_COMPILE_EXPORTFS -#include <linux/exportfs.h> -#endif - -#ifdef YAFFS_COMPILE_BACKGROUND -#include <linux/kthread.h> -#include <linux/delay.h> -#include <linux/freezer.h> -#endif - -#include <asm/div64.h> - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - -#include <linux/statfs.h> - -#define UnlockPage(p) unlock_page(p) -#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags) - -/* FIXME: use sb->s_id instead ? */ -#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) - -#else - -#include <linux/locks.h> -#define BDEVNAME_SIZE 0 -#define yaffs_devname(sb, buf) kdevname(sb->s_dev) - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 5, 0)) -/* added NCB 26/5/2006 for 2.4.25-vrs2-tcl1 kernel */ -#define __user -#endif - -#endif - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 26)) -#define YPROC_ROOT (&proc_root) -#else -#define YPROC_ROOT NULL -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -#define WRITE_SIZE_STR "writesize" -#define WRITE_SIZE(mtd) ((mtd)->writesize) -#else -#define WRITE_SIZE_STR "oobblock" -#define WRITE_SIZE(mtd) ((mtd)->oobblock) -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 27)) -#define YAFFS_USE_WRITE_BEGIN_END 1 -#else -#define YAFFS_USE_WRITE_BEGIN_END 0 -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 28)) -static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size) -{ - uint64_t result = partition_size; - do_div(result, block_size); - return (uint32_t)result; -} -#else -#define YCALCBLOCKS(s, b) ((s)/(b)) -#endif - -#include <linux/uaccess.h> -#include <linux/mtd/mtd.h> - -#include "yportenv.h" -#include "yaffs_trace.h" -#include "yaffs_guts.h" - -#include "yaffs_linux.h" - -#include "yaffs_mtdif.h" -#include "yaffs_mtdif1.h" -#include "yaffs_mtdif2.h" - -unsigned int yaffs_traceMask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS; -unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS; -unsigned int yaffs_auto_checkpoint = 1; -unsigned int yaffs_gc_control = 1; - -/* Module Parameters */ -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -module_param(yaffs_traceMask, uint, 0644); -module_param(yaffs_wr_attempts, uint, 0644); -module_param(yaffs_auto_checkpoint, uint, 0644); -module_param(yaffs_gc_control, uint, 0644); -#else -MODULE_PARM(yaffs_traceMask, "i"); -MODULE_PARM(yaffs_wr_attempts, "i"); -MODULE_PARM(yaffs_auto_checkpoint, "i"); -MODULE_PARM(yaffs_gc_control, "i"); -#endif - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 25)) -/* use iget and read_inode */ -#define Y_IGET(sb, inum) iget((sb), (inum)) -static void yaffs_read_inode(struct inode *inode); - -#else -/* Call local equivalent */ -#define YAFFS_USE_OWN_IGET -#define Y_IGET(sb, inum) yaffs_iget((sb), (inum)) - -static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino); -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18)) -#define yaffs_InodeToObjectLV(iptr) ((iptr)->i_private) -#else -#define yaffs_InodeToObjectLV(iptr) ((iptr)->u.generic_ip) -#endif - -#define yaffs_InodeToObject(iptr) ((yaffs_Object *)(yaffs_InodeToObjectLV(iptr))) -#define yaffs_DentryToObject(dptr) yaffs_InodeToObject((dptr)->d_inode) - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->s_fs_info) -#else -#define yaffs_SuperToDevice(sb) ((yaffs_Device *)sb->u.generic_sbp) -#endif - - -#define update_dir_time(dir) do {\ - (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \ - } while(0) - -static void yaffs_put_super(struct super_block *sb); - -static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, - loff_t *pos); -static ssize_t yaffs_hold_space(struct file *f); -static void yaffs_release_space(struct file *f); - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs_file_flush(struct file *file, fl_owner_t id); -#else -static int yaffs_file_flush(struct file *file); -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34)) -static int yaffs_sync_object(struct file *file, int datasync); -#else -static int yaffs_sync_object(struct file *file, struct dentry *dentry, - int datasync); -#endif - -static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir); - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *n); -static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *n); -#else -static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode); -static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry); -#endif -static int yaffs_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry); -static int yaffs_unlink(struct inode *dir, struct dentry *dentry); -static int yaffs_symlink(struct inode *dir, struct dentry *dentry, - const char *symname); -static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode); - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, - dev_t dev); -#else -static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, - int dev); -#endif -static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry); -static int yaffs_setattr(struct dentry *dentry, struct iattr *attr); - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs_sync_fs(struct super_block *sb, int wait); -static void yaffs_write_super(struct super_block *sb); -#else -static int yaffs_sync_fs(struct super_block *sb); -static int yaffs_write_super(struct super_block *sb); -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf); -#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf); -#else -static int yaffs_statfs(struct super_block *sb, struct statfs *buf); -#endif - -#ifdef YAFFS_HAS_PUT_INODE -static void yaffs_put_inode(struct inode *inode); -#endif - -static void yaffs_delete_inode(struct inode *); -static void yaffs_clear_inode(struct inode *); - -static int yaffs_readpage(struct file *file, struct page *page); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_writepage(struct page *page, struct writeback_control *wbc); -#else -static int yaffs_writepage(struct page *page); -#endif - - -#if (YAFFS_USE_WRITE_BEGIN_END != 0) -static int yaffs_write_begin(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata); -static int yaffs_write_end(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *pg, void *fsdadata); -#else -static int yaffs_prepare_write(struct file *f, struct page *pg, - unsigned offset, unsigned to); -static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, - unsigned to); - -#endif - -static int yaffs_readlink(struct dentry *dentry, char __user *buffer, - int buflen); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) -static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); -#else -static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd); -#endif -static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin); - -static struct address_space_operations yaffs_file_address_operations = { - .readpage = yaffs_readpage, - .writepage = yaffs_writepage, -#if (YAFFS_USE_WRITE_BEGIN_END > 0) - .write_begin = yaffs_write_begin, - .write_end = yaffs_write_end, -#else - .prepare_write = yaffs_prepare_write, - .commit_write = yaffs_commit_write, -#endif -}; - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 22)) -static const struct file_operations yaffs_file_operations = { - .read = do_sync_read, - .write = do_sync_write, - .aio_read = generic_file_aio_read, - .aio_write = generic_file_aio_write, - .mmap = generic_file_mmap, - .flush = yaffs_file_flush, - .fsync = yaffs_sync_object, - .splice_read = generic_file_splice_read, - .splice_write = generic_file_splice_write, - .llseek = generic_file_llseek, -}; - -#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 18)) - -static const struct file_operations yaffs_file_operations = { - .read = do_sync_read, - .write = do_sync_write, - .aio_read = generic_file_aio_read, - .aio_write = generic_file_aio_write, - .mmap = generic_file_mmap, - .flush = yaffs_file_flush, - .fsync = yaffs_sync_object, - .sendfile = generic_file_sendfile, -}; - -#else - -static const struct file_operations yaffs_file_operations = { - .read = generic_file_read, - .write = generic_file_write, - .mmap = generic_file_mmap, - .flush = yaffs_file_flush, - .fsync = yaffs_sync_object, -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - .sendfile = generic_file_sendfile, -#endif -}; -#endif - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25)) -static void zero_user_segment(struct page *page, unsigned start, unsigned end) -{ - void * kaddr = kmap_atomic(page, KM_USER0); - memset(kaddr + start, 0, end - start); - kunmap_atomic(kaddr, KM_USER0); - flush_dcache_page(page); -} -#endif - - -static const struct inode_operations yaffs_file_inode_operations = { - .setattr = yaffs_setattr, -}; - -static const struct inode_operations yaffs_symlink_inode_operations = { - .readlink = yaffs_readlink, - .follow_link = yaffs_follow_link, - .setattr = yaffs_setattr, -}; - -static const struct inode_operations yaffs_dir_inode_operations = { - .create = yaffs_create, - .lookup = yaffs_lookup, - .link = yaffs_link, - .unlink = yaffs_unlink, - .symlink = yaffs_symlink, - .mkdir = yaffs_mkdir, - .rmdir = yaffs_unlink, - .mknod = yaffs_mknod, - .rename = yaffs_rename, - .setattr = yaffs_setattr, -}; - -static const struct file_operations yaffs_dir_operations = { - .read = generic_read_dir, - .readdir = yaffs_readdir, - .fsync = yaffs_sync_object, - .llseek = yaffs_dir_llseek, -}; - -static const struct super_operations yaffs_super_ops = { - .statfs = yaffs_statfs, - -#ifndef YAFFS_USE_OWN_IGET - .read_inode = yaffs_read_inode, -#endif -#ifdef YAFFS_HAS_PUT_INODE - .put_inode = yaffs_put_inode, -#endif - .put_super = yaffs_put_super, - .delete_inode = yaffs_delete_inode, - .clear_inode = yaffs_clear_inode, - .sync_fs = yaffs_sync_fs, - .write_super = yaffs_write_super, -}; - -static unsigned yaffs_gc_control_callback(yaffs_Device *dev) -{ - return yaffs_gc_control; -} - -static void yaffs_GrossLock(yaffs_Device *dev) -{ - T(YAFFS_TRACE_LOCK, (TSTR("yaffs locking %p\n"), current)); - down(&(yaffs_DeviceToContext(dev)->grossLock)); - T(YAFFS_TRACE_LOCK, (TSTR("yaffs locked %p\n"), current)); -} - -static void yaffs_GrossUnlock(yaffs_Device *dev) -{ - T(YAFFS_TRACE_LOCK, (TSTR("yaffs unlocking %p\n"), current)); - up(&(yaffs_DeviceToContext(dev)->grossLock)); -} - -#ifdef YAFFS_COMPILE_EXPORTFS - -static struct inode * -yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, uint32_t generation) -{ - return Y_IGET(sb, ino); -} - -static struct dentry * -yaffs2_fh_to_dentry(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) -{ - return generic_fh_to_dentry(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode) ; -} - -static struct dentry * - yaffs2_fh_to_parent(struct super_block *sb, struct fid *fid, int fh_len, int fh_type) -{ - return generic_fh_to_parent(sb, fid, fh_len, fh_type, yaffs2_nfs_get_inode); -} - -struct dentry *yaffs2_get_parent(struct dentry *dentry) -{ - - struct super_block *sb = dentry->d_inode->i_sb; - struct dentry *parent = ERR_PTR(-ENOENT); - struct inode *inode; - unsigned long parent_ino; - yaffs_Object *d_obj; - yaffs_Object *parent_obj; - - d_obj = yaffs_InodeToObject(dentry->d_inode); - - if (d_obj) { - parent_obj = d_obj->parent; - if (parent_obj) { - parent_ino = yaffs_GetObjectInode(parent_obj); - inode = Y_IGET(sb, parent_ino); - - if (IS_ERR(inode)) { - parent = ERR_CAST(inode); - } else { - parent = d_obtain_alias(inode); - if (!IS_ERR(parent)) { - parent = ERR_PTR(-ENOMEM); - iput(inode); - } - } - } - } - - return parent; -} - -/* Just declare a zero structure as a NULL value implies - * using the default functions of exportfs. - */ - -static struct export_operations yaffs_export_ops = -{ - .fh_to_dentry = yaffs2_fh_to_dentry, - .fh_to_parent = yaffs2_fh_to_parent, - .get_parent = yaffs2_get_parent, -} ; - -#endif - -/*-----------------------------------------------------------------*/ -/* Directory search context allows us to unlock access to yaffs during - * filldir without causing problems with the directory being modified. - * This is similar to the tried and tested mechanism used in yaffs direct. - * - * A search context iterates along a doubly linked list of siblings in the - * directory. If the iterating object is deleted then this would corrupt - * the list iteration, likely causing a crash. The search context avoids - * this by using the removeObjectCallback to move the search context to the - * next object before the object is deleted. - * - * Many readdirs (and thus seach conexts) may be alive simulateously so - * each yaffs_Device has a list of these. - * - * A seach context lives for the duration of a readdir. - * - * All these functions must be called while yaffs is locked. - */ - -struct yaffs_SearchContext { - yaffs_Device *dev; - yaffs_Object *dirObj; - yaffs_Object *nextReturn; - struct ylist_head others; -}; - -/* - * yaffs_NewSearch() creates a new search context, initialises it and - * adds it to the device's search context list. - * - * Called at start of readdir. - */ -static struct yaffs_SearchContext * yaffs_NewSearch(yaffs_Object *dir) -{ - yaffs_Device *dev = dir->myDev; - struct yaffs_SearchContext *sc = YMALLOC(sizeof(struct yaffs_SearchContext)); - if(sc){ - sc->dirObj = dir; - sc->dev = dev; - if( ylist_empty(&sc->dirObj->variant.directoryVariant.children)) - sc->nextReturn = NULL; - else - sc->nextReturn = ylist_entry( - dir->variant.directoryVariant.children.next, - yaffs_Object,siblings); - YINIT_LIST_HEAD(&sc->others); - ylist_add(&sc->others,&(yaffs_DeviceToContext(dev)->searchContexts)); - } - return sc; -} - -/* - * yaffs_EndSearch() disposes of a search context and cleans up. - */ -static void yaffs_EndSearch(struct yaffs_SearchContext * sc) -{ - if(sc){ - ylist_del(&sc->others); - YFREE(sc); - } -} - -/* - * yaffs_SearchAdvance() moves a search context to the next object. - * Called when the search iterates or when an object removal causes - * the search context to be moved to the next object. - */ -static void yaffs_SearchAdvance(struct yaffs_SearchContext *sc) -{ - if(!sc) - return; - - if( sc->nextReturn == NULL || - ylist_empty(&sc->dirObj->variant.directoryVariant.children)) - sc->nextReturn = NULL; - else { - struct ylist_head *next = sc->nextReturn->siblings.next; - - if( next == &sc->dirObj->variant.directoryVariant.children) - sc->nextReturn = NULL; /* end of list */ - else - sc->nextReturn = ylist_entry(next,yaffs_Object,siblings); - } -} - -/* - * yaffs_RemoveObjectCallback() is called when an object is unlinked. - * We check open search contexts and advance any which are currently - * on the object being iterated. - */ -static void yaffs_RemoveObjectCallback(yaffs_Object *obj) -{ - - struct ylist_head *i; - struct yaffs_SearchContext *sc; - struct ylist_head *search_contexts = &(yaffs_DeviceToContext(obj->myDev)->searchContexts); - - - /* Iterate through the directory search contexts. - * If any are currently on the object being removed, then advance - * the search context to the next object to prevent a hanging pointer. - */ - ylist_for_each(i, search_contexts) { - if (i) { - sc = ylist_entry(i, struct yaffs_SearchContext,others); - if(sc->nextReturn == obj) - yaffs_SearchAdvance(sc); - } - } - -} - - -/*-----------------------------------------------------------------*/ - -static int yaffs_readlink(struct dentry *dentry, char __user *buffer, - int buflen) -{ - unsigned char *alias; - int ret; - - yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; - - yaffs_GrossLock(dev); - - alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); - - yaffs_GrossUnlock(dev); - - if (!alias) - return -ENOMEM; - - ret = vfs_readlink(dentry, buffer, buflen, alias); - kfree(alias); - return ret; -} - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) -static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) -#else -static int yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) -#endif -{ - unsigned char *alias; - int ret; - yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; - - yaffs_GrossLock(dev); - - alias = yaffs_GetSymlinkAlias(yaffs_DentryToObject(dentry)); - - yaffs_GrossUnlock(dev); - - if (!alias) { - ret = -ENOMEM; - goto out; - } - - ret = vfs_follow_link(nd, alias); - kfree(alias); -out: -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) - return ERR_PTR(ret); -#else - return ret; -#endif -} - -struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, - yaffs_Object *obj); - -/* - * Lookup is used to find objects in the fs - */ -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - -static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, - struct nameidata *n) -#else -static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry) -#endif -{ - yaffs_Object *obj; - struct inode *inode = NULL; /* NCB 2.5/2.6 needs NULL here */ - - yaffs_Device *dev = yaffs_InodeToObject(dir)->myDev; - - if(current != yaffs_DeviceToContext(dev)->readdirProcess) - yaffs_GrossLock(dev); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_lookup for %d:%s\n"), - yaffs_InodeToObject(dir)->objectId, dentry->d_name.name)); - - obj = yaffs_FindObjectByName(yaffs_InodeToObject(dir), - dentry->d_name.name); - - obj = yaffs_GetEquivalentObject(obj); /* in case it was a hardlink */ - - /* Can't hold gross lock when calling yaffs_get_inode() */ - if(current != yaffs_DeviceToContext(dev)->readdirProcess) - yaffs_GrossUnlock(dev); - - if (obj) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_lookup found %d\n"), obj->objectId)); - - inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); - - if (inode) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_loookup dentry \n"))); -/* #if 0 asserted by NCB for 2.5/6 compatability - falls through to - * d_add even if NULL inode */ -#if 0 - /*dget(dentry); // try to solve directory bug */ - d_add(dentry, inode); - - /* return dentry; */ - return NULL; -#endif - } - - } else { - T(YAFFS_TRACE_OS,(TSTR("yaffs_lookup not found\n"))); - - } - -/* added NCB for 2.5/6 compatability - forces add even if inode is - * NULL which creates dentry hash */ - d_add(dentry, inode); - - return NULL; -} - - -#ifdef YAFFS_HAS_PUT_INODE - -/* For now put inode is just for debugging - * Put inode is called when the inode **structure** is put. - */ -static void yaffs_put_inode(struct inode *inode) -{ - T(YAFFS_TRACE_OS, - (TSTR("yaffs_put_inode: ino %d, count %d\n"), (int)inode->i_ino, - atomic_read(&inode->i_count))); - -} -#endif - -/* clear is called to tell the fs to release any per-inode data it holds */ -static void yaffs_clear_inode(struct inode *inode) -{ - yaffs_Object *obj; - yaffs_Device *dev; - - obj = yaffs_InodeToObject(inode); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_clear_inode: ino %d, count %d %s\n"), (int)inode->i_ino, - atomic_read(&inode->i_count), - obj ? "object exists" : "null object")); - - if (obj) { - dev = obj->myDev; - yaffs_GrossLock(dev); - - /* Clear the association between the inode and - * the yaffs_Object. - */ - obj->myInode = NULL; - yaffs_InodeToObjectLV(inode) = NULL; - - /* If the object freeing was deferred, then the real - * free happens now. - * This should fix the inode inconsistency problem. - */ - - yaffs_HandleDeferedFree(obj); - - yaffs_GrossUnlock(dev); - } - -} - -/* delete is called when the link count is zero and the inode - * is put (ie. nobody wants to know about it anymore, time to - * delete the file). - * NB Must call clear_inode() - */ -static void yaffs_delete_inode(struct inode *inode) -{ - yaffs_Object *obj = yaffs_InodeToObject(inode); - yaffs_Device *dev; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_delete_inode: ino %d, count %d %s\n"), (int)inode->i_ino, - atomic_read(&inode->i_count), - obj ? "object exists" : "null object")); - - if (obj) { - dev = obj->myDev; - yaffs_GrossLock(dev); - yaffs_DeleteObject(obj); - yaffs_GrossUnlock(dev); - } -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 13)) - truncate_inode_pages(&inode->i_data, 0); -#endif - clear_inode(inode); -} - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs_file_flush(struct file *file, fl_owner_t id) -#else -static int yaffs_file_flush(struct file *file) -#endif -{ - yaffs_Object *obj = yaffs_DentryToObject(file->f_dentry); - - yaffs_Device *dev = obj->myDev; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_flush object %d (%s)\n"), obj->objectId, - obj->dirty ? "dirty" : "clean")); - - yaffs_GrossLock(dev); - - yaffs_FlushFile(obj, 1, 0); - - yaffs_GrossUnlock(dev); - - return 0; -} - -static int yaffs_readpage_nolock(struct file *f, struct page *pg) -{ - /* Lifted from jffs2 */ - - yaffs_Object *obj; - unsigned char *pg_buf; - int ret; - - yaffs_Device *dev; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readpage_nolock at %08x, size %08x\n"), - (unsigned)(pg->index << PAGE_CACHE_SHIFT), - (unsigned)PAGE_CACHE_SIZE)); - - obj = yaffs_DentryToObject(f->f_dentry); - - dev = obj->myDev; - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - BUG_ON(!PageLocked(pg)); -#else - if (!PageLocked(pg)) - PAGE_BUG(pg); -#endif - - pg_buf = kmap(pg); - /* FIXME: Can kmap fail? */ - - yaffs_GrossLock(dev); - - ret = yaffs_ReadDataFromFile(obj, pg_buf, - pg->index << PAGE_CACHE_SHIFT, - PAGE_CACHE_SIZE); - - yaffs_GrossUnlock(dev); - - if (ret >= 0) - ret = 0; - - if (ret) { - ClearPageUptodate(pg); - SetPageError(pg); - } else { - SetPageUptodate(pg); - ClearPageError(pg); - } - - flush_dcache_page(pg); - kunmap(pg); - - T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage_nolock done\n"))); - return ret; -} - -static int yaffs_readpage_unlock(struct file *f, struct page *pg) -{ - int ret = yaffs_readpage_nolock(f, pg); - UnlockPage(pg); - return ret; -} - -static int yaffs_readpage(struct file *f, struct page *pg) -{ - int ret; - - T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage\n"))); - ret=yaffs_readpage_unlock(f, pg); - T(YAFFS_TRACE_OS, (TSTR("yaffs_readpage done\n"))); - return ret; -} - -/* writepage inspired by/stolen from smbfs */ - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_writepage(struct page *page, struct writeback_control *wbc) -#else -static int yaffs_writepage(struct page *page) -#endif -{ - struct address_space *mapping = page->mapping; - struct inode *inode; - unsigned long end_index; - char *buffer; - yaffs_Object *obj; - int nWritten = 0; - unsigned nBytes; - loff_t i_size; - - if (!mapping) - BUG(); - inode = mapping->host; - if (!inode) - BUG(); - i_size = i_size_read(inode); - - end_index = i_size >> PAGE_CACHE_SHIFT; - - if(page->index < end_index) - nBytes = PAGE_CACHE_SIZE; - else { - nBytes = i_size & (PAGE_CACHE_SIZE -1); - - if (page->index > end_index || !nBytes) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_writepage at %08x, inode size = %08x!!!\n"), - (unsigned)(page->index << PAGE_CACHE_SHIFT), - (unsigned)inode->i_size)); - T(YAFFS_TRACE_OS, - (TSTR(" -> don't care!!\n"))); - - zero_user_segment(page,0,PAGE_CACHE_SIZE); - set_page_writeback(page); - unlock_page(page); - end_page_writeback(page); - return 0; - } - } - - if(nBytes != PAGE_CACHE_SIZE) - zero_user_segment(page,nBytes,PAGE_CACHE_SIZE); - - get_page(page); - - buffer = kmap(page); - - obj = yaffs_InodeToObject(inode); - yaffs_GrossLock(obj->myDev); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_writepage at %08x, size %08x\n"), - (unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes)); - T(YAFFS_TRACE_OS, - (TSTR("writepag0: obj = %05x, ino = %05x\n"), - (int)obj->variant.fileVariant.fileSize, (int)inode->i_size)); - - nWritten = yaffs_WriteDataToFile(obj, buffer, - page->index << PAGE_CACHE_SHIFT, nBytes, 0); - - T(YAFFS_TRACE_OS, - (TSTR("writepag1: obj = %05x, ino = %05x\n"), - (int)obj->variant.fileVariant.fileSize, (int)inode->i_size)); - - yaffs_GrossUnlock(obj->myDev); - - kunmap(page); - set_page_writeback(page); - unlock_page(page); - end_page_writeback(page); - put_page(page); - - return (nWritten == nBytes) ? 0 : -ENOSPC; -} - - -#if (YAFFS_USE_WRITE_BEGIN_END > 0) -static int yaffs_write_begin(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned flags, - struct page **pagep, void **fsdata) -{ - struct page *pg = NULL; - pgoff_t index = pos >> PAGE_CACHE_SHIFT; - - int ret = 0; - int space_held = 0; - - /* Get a page */ -#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 28) - pg = grab_cache_page_write_begin(mapping, index, flags); -#else - pg = __grab_cache_page(mapping, index); -#endif - - *pagep = pg; - if (!pg) { - ret = -ENOMEM; - goto out; - } - T(YAFFS_TRACE_OS, - (TSTR("start yaffs_write_begin index %d(%x) uptodate %d\n"), - (int)index,(int)index,Page_Uptodate(pg) ? 1 : 0)); - - /* Get fs space */ - space_held = yaffs_hold_space(filp); - - if (!space_held) { - ret = -ENOSPC; - goto out; - } - - /* Update page if required */ - - if (!Page_Uptodate(pg)) - ret = yaffs_readpage_nolock(filp, pg); - - if (ret) - goto out; - - /* Happy path return */ - T(YAFFS_TRACE_OS, (TSTR("end yaffs_write_begin - ok\n"))); - - return 0; - -out: - T(YAFFS_TRACE_OS, - (TSTR("end yaffs_write_begin fail returning %d\n"), ret)); - if (space_held) - yaffs_release_space(filp); - if (pg) { - unlock_page(pg); - page_cache_release(pg); - } - return ret; -} - -#else - -static int yaffs_prepare_write(struct file *f, struct page *pg, - unsigned offset, unsigned to) -{ - T(YAFFS_TRACE_OS, (TSTR("yaffs_prepair_write\n"))); - - if (!Page_Uptodate(pg)) - return yaffs_readpage_nolock(f, pg); - return 0; -} -#endif - -#if (YAFFS_USE_WRITE_BEGIN_END > 0) -static int yaffs_write_end(struct file *filp, struct address_space *mapping, - loff_t pos, unsigned len, unsigned copied, - struct page *pg, void *fsdadata) -{ - int ret = 0; - void *addr, *kva; - uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1); - - kva = kmap(pg); - addr = kva + offset_into_page; - - T(YAFFS_TRACE_OS, - ("yaffs_write_end addr %p pos %x nBytes %d\n", - addr,(unsigned)pos, copied)); - - ret = yaffs_file_write(filp, addr, copied, &pos); - - if (ret != copied) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_write_end not same size ret %d copied %d\n"), - ret, copied)); - SetPageError(pg); - } else { - /* Nothing */ - } - - kunmap(pg); - - yaffs_release_space(filp); - unlock_page(pg); - page_cache_release(pg); - return ret; -} -#else - -static int yaffs_commit_write(struct file *f, struct page *pg, unsigned offset, - unsigned to) -{ - void *addr, *kva; - - loff_t pos = (((loff_t) pg->index) << PAGE_CACHE_SHIFT) + offset; - int nBytes = to - offset; - int nWritten; - - unsigned spos = pos; - unsigned saddr; - - kva = kmap(pg); - addr = kva + offset; - - saddr = (unsigned) addr; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_commit_write addr %x pos %x nBytes %d\n"), - saddr, spos, nBytes)); - - nWritten = yaffs_file_write(f, addr, nBytes, &pos); - - if (nWritten != nBytes) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_commit_write not same size nWritten %d nBytes %d\n"), - nWritten, nBytes)); - SetPageError(pg); - } else { - /* Nothing */ - } - - kunmap(pg); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_commit_write returning %d\n"), - nWritten == nBytes ? 0 : nWritten)); - - return nWritten == nBytes ? 0 : nWritten; -} -#endif - - -static void yaffs_FillInodeFromObject(struct inode *inode, yaffs_Object *obj) -{ - if (inode && obj) { - - - /* Check mode against the variant type and attempt to repair if broken. */ - __u32 mode = obj->yst_mode; - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - if (!S_ISREG(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFREG; - } - - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if (!S_ISLNK(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFLNK; - } - - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - if (!S_ISDIR(mode)) { - obj->yst_mode &= ~S_IFMT; - obj->yst_mode |= S_IFDIR; - } - - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - case YAFFS_OBJECT_TYPE_HARDLINK: - case YAFFS_OBJECT_TYPE_SPECIAL: - default: - /* TODO? */ - break; - } - - inode->i_flags |= S_NOATIME; - - inode->i_ino = obj->objectId; - inode->i_mode = obj->yst_mode; - inode->i_uid = obj->yst_uid; - inode->i_gid = obj->yst_gid; -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) - inode->i_blksize = inode->i_sb->s_blocksize; -#endif -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - - inode->i_rdev = old_decode_dev(obj->yst_rdev); - inode->i_atime.tv_sec = (time_t) (obj->yst_atime); - inode->i_atime.tv_nsec = 0; - inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; - inode->i_mtime.tv_nsec = 0; - inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; - inode->i_ctime.tv_nsec = 0; -#else - inode->i_rdev = obj->yst_rdev; - inode->i_atime = obj->yst_atime; - inode->i_mtime = obj->yst_mtime; - inode->i_ctime = obj->yst_ctime; -#endif - inode->i_size = yaffs_GetObjectFileLength(obj); - inode->i_blocks = (inode->i_size + 511) >> 9; - - inode->i_nlink = yaffs_GetObjectLinkCount(obj); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_FillInode mode %x uid %d gid %d size %d count %d\n"), - inode->i_mode, inode->i_uid, inode->i_gid, - (int)inode->i_size, atomic_read(&inode->i_count))); - - switch (obj->yst_mode & S_IFMT) { - default: /* fifo, device or socket */ -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - init_special_inode(inode, obj->yst_mode, - old_decode_dev(obj->yst_rdev)); -#else - init_special_inode(inode, obj->yst_mode, - (dev_t) (obj->yst_rdev)); -#endif - break; - case S_IFREG: /* file */ - inode->i_op = &yaffs_file_inode_operations; - inode->i_fop = &yaffs_file_operations; - inode->i_mapping->a_ops = - &yaffs_file_address_operations; - break; - case S_IFDIR: /* directory */ - inode->i_op = &yaffs_dir_inode_operations; - inode->i_fop = &yaffs_dir_operations; - break; - case S_IFLNK: /* symlink */ - inode->i_op = &yaffs_symlink_inode_operations; - break; - } - - yaffs_InodeToObjectLV(inode) = obj; - - obj->myInode = inode; - - } else { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_FileInode invalid parameters\n"))); - } - -} - -struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, - yaffs_Object *obj) -{ - struct inode *inode; - - if (!sb) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_get_inode for NULL super_block!!\n"))); - return NULL; - - } - - if (!obj) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_get_inode for NULL object!!\n"))); - return NULL; - - } - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_get_inode for object %d\n"), obj->objectId)); - - inode = Y_IGET(sb, obj->objectId); - if (IS_ERR(inode)) - return NULL; - - /* NB Side effect: iget calls back to yaffs_read_inode(). */ - /* iget also increments the inode's i_count */ - /* NB You can't be holding grossLock or deadlock will happen! */ - - return inode; -} - -static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, - loff_t *pos) -{ - yaffs_Object *obj; - int nWritten, ipos; - struct inode *inode; - yaffs_Device *dev; - - obj = yaffs_DentryToObject(f->f_dentry); - - dev = obj->myDev; - - yaffs_GrossLock(dev); - - inode = f->f_dentry->d_inode; - - if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) - ipos = inode->i_size; - else - ipos = *pos; - - if (!obj) - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write: hey obj is null!\n"))); - else - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write about to write writing %u(%x) bytes" - "to object %d at %d(%x)\n"), - (unsigned) n, (unsigned) n, obj->objectId, ipos,ipos)); - - nWritten = yaffs_WriteDataToFile(obj, buf, ipos, n, 0); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write: %d(%x) bytes written\n"), - (unsigned )n,(unsigned)n)); - - if (nWritten > 0) { - ipos += nWritten; - *pos = ipos; - if (ipos > inode->i_size) { - inode->i_size = ipos; - inode->i_blocks = (ipos + 511) >> 9; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_file_write size updated to %d bytes, " - "%d blocks\n"), - ipos, (int)(inode->i_blocks))); - } - - } - yaffs_GrossUnlock(dev); - return (nWritten == 0) && (n > 0) ? -ENOSPC : nWritten; -} - -/* Space holding and freeing is done to ensure we have space available for write_begin/end */ -/* For now we just assume few parallel writes and check against a small number. */ -/* Todo: need to do this with a counter to handle parallel reads better */ - -static ssize_t yaffs_hold_space(struct file *f) -{ - yaffs_Object *obj; - yaffs_Device *dev; - - int nFreeChunks; - - - obj = yaffs_DentryToObject(f->f_dentry); - - dev = obj->myDev; - - yaffs_GrossLock(dev); - - nFreeChunks = yaffs_GetNumberOfFreeChunks(dev); - - yaffs_GrossUnlock(dev); - - return (nFreeChunks > 20) ? 1 : 0; -} - -static void yaffs_release_space(struct file *f) -{ - yaffs_Object *obj; - yaffs_Device *dev; - - - obj = yaffs_DentryToObject(f->f_dentry); - - dev = obj->myDev; - - yaffs_GrossLock(dev); - - - yaffs_GrossUnlock(dev); -} - - -static loff_t yaffs_dir_llseek(struct file *file, loff_t offset, int origin) -{ - long long retval; - - lock_kernel(); - - switch (origin){ - case 2: - offset += i_size_read(file->f_path.dentry->d_inode); - break; - case 1: - offset += file->f_pos; - } - retval = -EINVAL; - - if (offset >= 0){ - if (offset != file->f_pos) - file->f_pos = offset; - - retval = offset; - } - unlock_kernel(); - return retval; -} - - -static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) -{ - yaffs_Object *obj; - yaffs_Device *dev; - struct yaffs_SearchContext *sc; - struct inode *inode = f->f_dentry->d_inode; - unsigned long offset, curoffs; - yaffs_Object *l; - int retVal = 0; - - char name[YAFFS_MAX_NAME_LENGTH + 1]; - - obj = yaffs_DentryToObject(f->f_dentry); - dev = obj->myDev; - - yaffs_GrossLock(dev); - - yaffs_DeviceToContext(dev)->readdirProcess = current; - - offset = f->f_pos; - - sc = yaffs_NewSearch(obj); - if(!sc){ - retVal = -ENOMEM; - goto unlock_out; - } - - T(YAFFS_TRACE_OS, (TSTR("yaffs_readdir: starting at %d\n"), (int)offset)); - - if (offset == 0) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readdir: entry . ino %d \n"), - (int)inode->i_ino)); - yaffs_GrossUnlock(dev); - if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) - goto out; - yaffs_GrossLock(dev); - offset++; - f->f_pos++; - } - if (offset == 1) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readdir: entry .. ino %d \n"), - (int)f->f_dentry->d_parent->d_inode->i_ino)); - yaffs_GrossUnlock(dev); - if (filldir(dirent, "..", 2, offset, - f->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) - goto out; - yaffs_GrossLock(dev); - offset++; - f->f_pos++; - } - - curoffs = 1; - - /* If the directory has changed since the open or last call to - readdir, rewind to after the 2 canned entries. */ - if (f->f_version != inode->i_version) { - offset = 2; - f->f_pos = offset; - f->f_version = inode->i_version; - } - - while(sc->nextReturn){ - curoffs++; - l = sc->nextReturn; - if (curoffs >= offset) { - int this_inode = yaffs_GetObjectInode(l); - int this_type = yaffs_GetObjectType(l); - - yaffs_GetObjectName(l, name, - YAFFS_MAX_NAME_LENGTH + 1); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_readdir: %s inode %d\n"), - name, yaffs_GetObjectInode(l))); - - yaffs_GrossUnlock(dev); - - if (filldir(dirent, - name, - strlen(name), - offset, - this_inode, - this_type) < 0) - goto out; - - yaffs_GrossLock(dev); - - offset++; - f->f_pos++; - } - yaffs_SearchAdvance(sc); - } - -unlock_out: - yaffs_DeviceToContext(dev)->readdirProcess = NULL; - - yaffs_GrossUnlock(dev); -out: - yaffs_EndSearch(sc); - - return retVal; -} - - - -/* - * File creation. Allocate an inode, and we're done.. - */ - -#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) -#define YCRED(x) x -#else -#define YCRED(x) (x->cred) -#endif - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, - dev_t rdev) -#else -static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, - int rdev) -#endif -{ - struct inode *inode; - - yaffs_Object *obj = NULL; - yaffs_Device *dev; - - yaffs_Object *parent = yaffs_InodeToObject(dir); - - int error = -ENOSPC; - uid_t uid = YCRED(current)->fsuid; - gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; - - if ((dir->i_mode & S_ISGID) && S_ISDIR(mode)) - mode |= S_ISGID; - - if (parent) { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod: parent object %d type %d\n"), - parent->objectId, parent->variantType)); - } else { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod: could not get parent object\n"))); - return -EPERM; - } - - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making oject for %s, " - "mode %x dev %x\n"), - dentry->d_name.name, mode, rdev)); - - dev = parent->myDev; - - yaffs_GrossLock(dev); - - switch (mode & S_IFMT) { - default: - /* Special (socket, fifo, device...) */ - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making special\n"))); -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid, - gid, old_encode_dev(rdev)); -#else - obj = yaffs_MknodSpecial(parent, dentry->d_name.name, mode, uid, - gid, rdev); -#endif - break; - case S_IFREG: /* file */ - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making file\n"))); - obj = yaffs_MknodFile(parent, dentry->d_name.name, mode, uid, - gid); - break; - case S_IFDIR: /* directory */ - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod: making directory\n"))); - obj = yaffs_MknodDirectory(parent, dentry->d_name.name, mode, - uid, gid); - break; - case S_IFLNK: /* symlink */ - T(YAFFS_TRACE_OS, (TSTR("yaffs_mknod: making symlink\n"))); - obj = NULL; /* Do we ever get here? */ - break; - } - - /* Can not call yaffs_get_inode() with gross lock held */ - yaffs_GrossUnlock(dev); - - if (obj) { - inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); - d_instantiate(dentry, inode); - update_dir_time(dir); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod created object %d count = %d\n"), - obj->objectId, atomic_read(&inode->i_count))); - error = 0; - yaffs_FillInodeFromObject(dir,parent); - } else { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_mknod failed making object\n"))); - error = -ENOMEM; - } - - return error; -} - -static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode) -{ - int retVal; - T(YAFFS_TRACE_OS, (TSTR("yaffs_mkdir\n"))); - retVal = yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); - return retVal; -} - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, - struct nameidata *n) -#else -static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode) -#endif -{ - T(YAFFS_TRACE_OS,(TSTR("yaffs_create\n"))); - return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); -} - -static int yaffs_unlink(struct inode *dir, struct dentry *dentry) -{ - int retVal; - - yaffs_Device *dev; - yaffs_Object *obj; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_unlink %d:%s\n"), - (int)(dir->i_ino), - dentry->d_name.name)); - obj = yaffs_InodeToObject(dir); - dev = obj->myDev; - - yaffs_GrossLock(dev); - - retVal = yaffs_Unlink(obj, dentry->d_name.name); - - if (retVal == YAFFS_OK) { - dentry->d_inode->i_nlink--; - dir->i_version++; - yaffs_GrossUnlock(dev); - mark_inode_dirty(dentry->d_inode); - update_dir_time(dir); - return 0; - } - yaffs_GrossUnlock(dev); - return -ENOTEMPTY; -} - -/* - * Create a link... - */ -static int yaffs_link(struct dentry *old_dentry, struct inode *dir, - struct dentry *dentry) -{ - struct inode *inode = old_dentry->d_inode; - yaffs_Object *obj = NULL; - yaffs_Object *link = NULL; - yaffs_Device *dev; - - T(YAFFS_TRACE_OS, (TSTR("yaffs_link\n"))); - - obj = yaffs_InodeToObject(inode); - dev = obj->myDev; - - yaffs_GrossLock(dev); - - if (!S_ISDIR(inode->i_mode)) /* Don't link directories */ - link = yaffs_Link(yaffs_InodeToObject(dir), dentry->d_name.name, - obj); - - if (link) { - old_dentry->d_inode->i_nlink = yaffs_GetObjectLinkCount(obj); - d_instantiate(dentry, old_dentry->d_inode); - atomic_inc(&old_dentry->d_inode->i_count); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_link link count %d i_count %d\n"), - old_dentry->d_inode->i_nlink, - atomic_read(&old_dentry->d_inode->i_count))); - } - - yaffs_GrossUnlock(dev); - - if (link){ - update_dir_time(dir); - return 0; - } - - return -EPERM; -} - -static int yaffs_symlink(struct inode *dir, struct dentry *dentry, - const char *symname) -{ - yaffs_Object *obj; - yaffs_Device *dev; - uid_t uid = YCRED(current)->fsuid; - gid_t gid = (dir->i_mode & S_ISGID) ? dir->i_gid : YCRED(current)->fsgid; - - T(YAFFS_TRACE_OS, (TSTR("yaffs_symlink\n"))); - - dev = yaffs_InodeToObject(dir)->myDev; - yaffs_GrossLock(dev); - obj = yaffs_MknodSymLink(yaffs_InodeToObject(dir), dentry->d_name.name, - S_IFLNK | S_IRWXUGO, uid, gid, symname); - yaffs_GrossUnlock(dev); - - if (obj) { - struct inode *inode; - - inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); - d_instantiate(dentry, inode); - update_dir_time(dir); - T(YAFFS_TRACE_OS, (TSTR("symlink created OK\n"))); - return 0; - } else { - T(YAFFS_TRACE_OS, (TSTR("symlink not created\n"))); - } - - return -ENOMEM; -} - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34)) -static int yaffs_sync_object(struct file *file, int datasync) -#else -static int yaffs_sync_object(struct file *file, struct dentry *dentry, - int datasync) -#endif -{ - - yaffs_Object *obj; - yaffs_Device *dev; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 34)) - struct dentry *dentry = file->f_path.dentry; -#endif - - obj = yaffs_DentryToObject(dentry); - - dev = obj->myDev; - - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, - (TSTR("yaffs_sync_object\n"))); - yaffs_GrossLock(dev); - yaffs_FlushFile(obj, 1, datasync); - yaffs_GrossUnlock(dev); - return 0; -} - -/* - * The VFS layer already does all the dentry stuff for rename. - * - * NB: POSIX says you can rename an object over an old object of the same name - */ -static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) -{ - yaffs_Device *dev; - int retVal = YAFFS_FAIL; - yaffs_Object *target; - - T(YAFFS_TRACE_OS, (TSTR("yaffs_rename\n"))); - dev = yaffs_InodeToObject(old_dir)->myDev; - - yaffs_GrossLock(dev); - - /* Check if the target is an existing directory that is not empty. */ - target = yaffs_FindObjectByName(yaffs_InodeToObject(new_dir), - new_dentry->d_name.name); - - - - if (target && target->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && - !ylist_empty(&target->variant.directoryVariant.children)) { - - T(YAFFS_TRACE_OS, (TSTR("target is non-empty dir\n"))); - - retVal = YAFFS_FAIL; - } else { - /* Now does unlinking internally using shadowing mechanism */ - T(YAFFS_TRACE_OS, (TSTR("calling yaffs_RenameObject\n"))); - - retVal = yaffs_RenameObject(yaffs_InodeToObject(old_dir), - old_dentry->d_name.name, - yaffs_InodeToObject(new_dir), - new_dentry->d_name.name); - } - yaffs_GrossUnlock(dev); - - if (retVal == YAFFS_OK) { - if (target) { - new_dentry->d_inode->i_nlink--; - mark_inode_dirty(new_dentry->d_inode); - } - - update_dir_time(old_dir); - if(old_dir != new_dir) - update_dir_time(new_dir); - return 0; - } else { - return -ENOTEMPTY; - } -} - -static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) -{ - struct inode *inode = dentry->d_inode; - int error = 0; - yaffs_Device *dev; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_setattr of object %d\n"), - yaffs_InodeToObject(inode)->objectId)); - - /* Fail if a requested resize >= 2GB */ - if (attr->ia_valid & ATTR_SIZE && - (attr->ia_size >> 31)) - error = -EINVAL; - - if (error == 0) - error = inode_change_ok(inode, attr); - if (error == 0) { - int result; - if (!error){ - error = inode_setattr(inode, attr); - T(YAFFS_TRACE_OS,(TSTR("inode_setattr called\n"))); - if (attr->ia_valid & ATTR_SIZE) - truncate_inode_pages(&inode->i_data,attr->ia_size); - } - dev = yaffs_InodeToObject(inode)->myDev; - if (attr->ia_valid & ATTR_SIZE){ - T(YAFFS_TRACE_OS,(TSTR("resize to %d(%x)\n"), - (int)(attr->ia_size),(int)(attr->ia_size))); - } - yaffs_GrossLock(dev); - result = yaffs_SetAttributes(yaffs_InodeToObject(inode), attr); - if(result == YAFFS_OK) { - error = 0; - } else { - error = -EPERM; - } - yaffs_GrossUnlock(dev); - - } - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_setattr done returning %d\n"),error)); - - return error; -} - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) -{ - yaffs_Device *dev = yaffs_DentryToObject(dentry)->myDev; - struct super_block *sb = dentry->d_sb; -#elif (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_statfs(struct super_block *sb, struct kstatfs *buf) -{ - yaffs_Device *dev = yaffs_SuperToDevice(sb); -#else -static int yaffs_statfs(struct super_block *sb, struct statfs *buf) -{ - yaffs_Device *dev = yaffs_SuperToDevice(sb); -#endif - - T(YAFFS_TRACE_OS, (TSTR("yaffs_statfs\n"))); - - yaffs_GrossLock(dev); - - buf->f_type = YAFFS_MAGIC; - buf->f_bsize = sb->s_blocksize; - buf->f_namelen = 255; - - if (dev->nDataBytesPerChunk & (dev->nDataBytesPerChunk - 1)) { - /* Do this if chunk size is not a power of 2 */ - - uint64_t bytesInDev; - uint64_t bytesFree; - - bytesInDev = ((uint64_t)((dev->param.endBlock - dev->param.startBlock + 1))) * - ((uint64_t)(dev->param.nChunksPerBlock * dev->nDataBytesPerChunk)); - - do_div(bytesInDev, sb->s_blocksize); /* bytesInDev becomes the number of blocks */ - buf->f_blocks = bytesInDev; - - bytesFree = ((uint64_t)(yaffs_GetNumberOfFreeChunks(dev))) * - ((uint64_t)(dev->nDataBytesPerChunk)); - - do_div(bytesFree, sb->s_blocksize); - - buf->f_bfree = bytesFree; - - } else if (sb->s_blocksize > dev->nDataBytesPerChunk) { - - buf->f_blocks = - (dev->param.endBlock - dev->param.startBlock + 1) * - dev->param.nChunksPerBlock / - (sb->s_blocksize / dev->nDataBytesPerChunk); - buf->f_bfree = - yaffs_GetNumberOfFreeChunks(dev) / - (sb->s_blocksize / dev->nDataBytesPerChunk); - } else { - buf->f_blocks = - (dev->param.endBlock - dev->param.startBlock + 1) * - dev->param.nChunksPerBlock * - (dev->nDataBytesPerChunk / sb->s_blocksize); - - buf->f_bfree = - yaffs_GetNumberOfFreeChunks(dev) * - (dev->nDataBytesPerChunk / sb->s_blocksize); - } - - buf->f_files = 0; - buf->f_ffree = 0; - buf->f_bavail = buf->f_bfree; - - yaffs_GrossUnlock(dev); - return 0; -} - - - -static void yaffs_FlushInodes(struct super_block *sb) -{ - struct inode *iptr; - yaffs_Object *obj; - - list_for_each_entry(iptr,&sb->s_inodes, i_sb_list){ - obj = yaffs_InodeToObject(iptr); - if(obj){ - T(YAFFS_TRACE_OS, (TSTR("flushing obj %d\n"), - obj->objectId)); - yaffs_FlushFile(obj,1,0); - } - } -} - - -static void yaffs_FlushSuperBlock(struct super_block *sb, int do_checkpoint) -{ - yaffs_Device *dev = yaffs_SuperToDevice(sb); - if(!dev) - return; - - yaffs_FlushInodes(sb); - yaffs_UpdateDirtyDirectories(dev); - yaffs_FlushEntireDeviceCache(dev); - if(do_checkpoint) - yaffs_CheckpointSave(dev); -} - - -static unsigned yaffs_bg_gc_urgency(yaffs_Device *dev) -{ - unsigned erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock; - struct yaffs_LinuxContext *context = yaffs_DeviceToContext(dev); - unsigned scatteredFree = 0; /* Free chunks not in an erased block */ - - if(erasedChunks < dev->nFreeChunks) - scatteredFree = (dev->nFreeChunks - erasedChunks); - - if(!context->bgRunning) - return 0; - else if(scatteredFree < (dev->param.nChunksPerBlock * 2)) - return 0; - else if(erasedChunks > dev->nFreeChunks/2) - return 0; - else if(erasedChunks > dev->nFreeChunks/4) - return 1; - else - return 2; -} - -static int yaffs_do_sync_fs(struct super_block *sb, - int request_checkpoint) -{ - - yaffs_Device *dev = yaffs_SuperToDevice(sb); - unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4); - unsigned gc_urgent = yaffs_bg_gc_urgency(dev); - int do_checkpoint; - - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_do_sync_fs: gc-urgency %d %s %s%s\n"), - gc_urgent, - sb->s_dirt ? "dirty" : "clean", - request_checkpoint ? "checkpoint requested" : "no checkpoint", - oneshot_checkpoint ? " one-shot" : "" )); - - yaffs_GrossLock(dev); - do_checkpoint = ((request_checkpoint && !gc_urgent) || - oneshot_checkpoint) && - !dev->isCheckpointed; - - if (sb->s_dirt || do_checkpoint) { - yaffs_FlushSuperBlock(sb, !dev->isCheckpointed && do_checkpoint); - sb->s_dirt = 0; - if(oneshot_checkpoint) - yaffs_auto_checkpoint &= ~4; - } - yaffs_GrossUnlock(dev); - - return 0; -} - -/* - * yaffs background thread functions . - * yaffs_BackgroundThread() the thread function - * yaffs_BackgroundStart() launches the background thread. - * yaffs_BackgroundStop() cleans up the background thread. - * - * NB: - * The thread should only run after the yaffs is initialised - * The thread should be stopped before yaffs is unmounted. - * The thread should not do any writing while the fs is in read only. - */ - -#ifdef YAFFS_COMPILE_BACKGROUND - -void yaffs_background_waker(unsigned long data) -{ - wake_up_process((struct task_struct *)data); -} - -static int yaffs_BackgroundThread(void *data) -{ - yaffs_Device *dev = (yaffs_Device *)data; - struct yaffs_LinuxContext *context = yaffs_DeviceToContext(dev); - unsigned long now = jiffies; - unsigned long next_dir_update = now; - unsigned long next_gc = now; - unsigned long expires; - unsigned int urgency; - - int gcResult; - struct timer_list timer; - - T(YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_background starting for dev %p\n"), - (void *)dev)); - - set_freezable(); - - while(context->bgRunning){ - T(YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_background\n"))); - - if(kthread_should_stop()) - break; - - if(try_to_freeze()) - continue; - - yaffs_GrossLock(dev); - - now = jiffies; - - if(time_after(now, next_dir_update)){ - yaffs_UpdateDirtyDirectories(dev); - next_dir_update = now + HZ; - } - - if(time_after(now,next_gc)){ - if(!dev->isCheckpointed){ - urgency = yaffs_bg_gc_urgency(dev); - gcResult = yaffs_BackgroundGarbageCollect(dev, urgency); - if(urgency > 1) - next_gc = now + HZ/20+1; - else if(urgency > 0) - next_gc = now + HZ/10+1; - else - next_gc = now + HZ * 2; - } else /* - * gc not running so set to next_dir_update - * to cut down on wake ups - */ - next_gc = next_dir_update; - } - yaffs_GrossUnlock(dev); -#if 1 - expires = next_dir_update; - if (time_before(next_gc,expires)) - expires = next_gc; - if(time_before(expires,now)) - expires = now + HZ; - - init_timer_on_stack(&timer); - timer.expires = expires+1; - timer.data = (unsigned long) current; - timer.function = yaffs_background_waker; - - set_current_state(TASK_INTERRUPTIBLE); - add_timer(&timer); - schedule(); - del_timer_sync(&timer); -#else - msleep(10); -#endif - } - - return 0; -} - -static int yaffs_BackgroundStart(yaffs_Device *dev) -{ - int retval = 0; - struct yaffs_LinuxContext *context = yaffs_DeviceToContext(dev); - - context->bgRunning = 1; - - context->bgThread = kthread_run(yaffs_BackgroundThread, - (void *)dev,"yaffs-bg"); - - if(IS_ERR(context->bgThread)){ - retval = PTR_ERR(context->bgThread); - context->bgThread = NULL; - context->bgRunning = 0; - } - return retval; -} - -static void yaffs_BackgroundStop(yaffs_Device *dev) -{ - struct yaffs_LinuxContext *ctxt = yaffs_DeviceToContext(dev); - - ctxt->bgRunning = 0; - - if( ctxt->bgThread){ - kthread_stop(ctxt->bgThread); - ctxt->bgThread = NULL; - } -} -#else -static int yaffs_BackgroundThread(void *data) -{ - return 0; -} - -static int yaffs_BackgroundStart(yaffs_Device *dev) -{ - return 0; -} - -static void yaffs_BackgroundStop(yaffs_Device *dev) -{ -} -#endif - - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static void yaffs_write_super(struct super_block *sb) -#else -static int yaffs_write_super(struct super_block *sb) -#endif -{ - unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2); - - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs_write_super%s\n"), - request_checkpoint ? " checkpt" : "")); - - yaffs_do_sync_fs(sb, request_checkpoint); - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 18)) - return 0; -#endif -} - - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs_sync_fs(struct super_block *sb, int wait) -#else -static int yaffs_sync_fs(struct super_block *sb) -#endif -{ - unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1); - - T(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, - (TSTR("yaffs_sync_fs%s\n"), - request_checkpoint ? " checkpt" : "")); - - yaffs_do_sync_fs(sb, request_checkpoint); - - return 0; -} - -#ifdef YAFFS_USE_OWN_IGET - -static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino) -{ - struct inode *inode; - yaffs_Object *obj; - yaffs_Device *dev = yaffs_SuperToDevice(sb); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_iget for %lu\n"), ino)); - - inode = iget_locked(sb, ino); - if (!inode) - return ERR_PTR(-ENOMEM); - if (!(inode->i_state & I_NEW)) - return inode; - - /* NB This is called as a side effect of other functions, but - * we had to release the lock to prevent deadlocks, so - * need to lock again. - */ - - yaffs_GrossLock(dev); - - obj = yaffs_FindObjectByNumber(dev, inode->i_ino); - - yaffs_FillInodeFromObject(inode, obj); - - yaffs_GrossUnlock(dev); - - unlock_new_inode(inode); - return inode; -} - -#else - -static void yaffs_read_inode(struct inode *inode) -{ - /* NB This is called as a side effect of other functions, but - * we had to release the lock to prevent deadlocks, so - * need to lock again. - */ - - yaffs_Object *obj; - yaffs_Device *dev = yaffs_SuperToDevice(inode->i_sb); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_read_inode for %d\n"), (int)inode->i_ino)); - - if(current != yaffs_DeviceToContext(dev)->readdirProcess) - yaffs_GrossLock(dev); - - obj = yaffs_FindObjectByNumber(dev, inode->i_ino); - - yaffs_FillInodeFromObject(inode, obj); - - if(current != yaffs_DeviceToContext(dev)->readdirProcess) - yaffs_GrossUnlock(dev); -} - -#endif - -static YLIST_HEAD(yaffs_context_list); -struct semaphore yaffs_context_lock; - -#if 0 /* not used */ -static int yaffs_remount_fs(struct super_block *sb, int *flags, char *data) -{ - yaffs_Device *dev = yaffs_SuperToDevice(sb); - - if (*flags & MS_RDONLY) { - struct mtd_info *mtd = yaffs_SuperToDevice(sb)->genericDevice; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_remount_fs: %s: RO\n"), dev->name)); - - yaffs_GrossLock(dev); - - yaffs_FlushSuperBlock(sb,1); - - if (mtd->sync) - mtd->sync(mtd); - - yaffs_GrossUnlock(dev); - } else { - T(YAFFS_TRACE_OS, - (TSTR("yaffs_remount_fs: %s: RW\n"), dev->name)); - } - - return 0; -} -#endif - -static void yaffs_put_super(struct super_block *sb) -{ - yaffs_Device *dev = yaffs_SuperToDevice(sb); - - T(YAFFS_TRACE_OS, (TSTR("yaffs_put_super\n"))); - - T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, - (TSTR("Shutting down yaffs background thread\n"))); - yaffs_BackgroundStop(dev); - T(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, - (TSTR("yaffs background thread shut down\n"))); - - yaffs_GrossLock(dev); - - yaffs_FlushSuperBlock(sb,1); - - if (yaffs_DeviceToContext(dev)->putSuperFunc) - yaffs_DeviceToContext(dev)->putSuperFunc(sb); - - - yaffs_Deinitialise(dev); - - yaffs_GrossUnlock(dev); - - down(&yaffs_context_lock); - ylist_del_init(&(yaffs_DeviceToContext(dev)->contextList)); - up(&yaffs_context_lock); - - if (yaffs_DeviceToContext(dev)->spareBuffer) { - YFREE(yaffs_DeviceToContext(dev)->spareBuffer); - yaffs_DeviceToContext(dev)->spareBuffer = NULL; - } - - kfree(dev); -} - - -static void yaffs_MTDPutSuper(struct super_block *sb) -{ - struct mtd_info *mtd = yaffs_DeviceToContext(yaffs_SuperToDevice(sb))->mtd; - - if (mtd->sync) - mtd->sync(mtd); - - put_mtd_device(mtd); -} - - -static void yaffs_MarkSuperBlockDirty(yaffs_Device *dev) -{ - struct super_block *sb = yaffs_DeviceToContext(dev)->superBlock; - - T(YAFFS_TRACE_OS, (TSTR("yaffs_MarkSuperBlockDirty() sb = %p\n"), sb)); - if (sb) - sb->s_dirt = 1; -} - -typedef struct { - int inband_tags; - int skip_checkpoint_read; - int skip_checkpoint_write; - int no_cache; - int tags_ecc_on; - int tags_ecc_overridden; - int lazy_loading_enabled; - int lazy_loading_overridden; - int empty_lost_and_found; - int empty_lost_and_found_overridden; -} yaffs_options; - -#define MAX_OPT_LEN 30 -static int yaffs_parse_options(yaffs_options *options, const char *options_str) -{ - char cur_opt[MAX_OPT_LEN + 1]; - int p; - int error = 0; - - /* Parse through the options which is a comma seperated list */ - - while (options_str && *options_str && !error) { - memset(cur_opt, 0, MAX_OPT_LEN + 1); - p = 0; - - while(*options_str == ',') - options_str++; - - while (*options_str && *options_str != ',') { - if (p < MAX_OPT_LEN) { - cur_opt[p] = *options_str; - p++; - } - options_str++; - } - - if (!strcmp(cur_opt, "inband-tags")) - options->inband_tags = 1; - else if (!strcmp(cur_opt, "tags-ecc-off")){ - options->tags_ecc_on = 0; - options->tags_ecc_overridden=1; - } else if (!strcmp(cur_opt, "tags-ecc-on")){ - options->tags_ecc_on = 1; - options->tags_ecc_overridden = 1; - } else if (!strcmp(cur_opt, "lazy-loading-off")){ - options->lazy_loading_enabled = 0; - options->lazy_loading_overridden=1; - } else if (!strcmp(cur_opt, "lazy-loading-on")){ - options->lazy_loading_enabled = 1; - options->lazy_loading_overridden = 1; - } else if (!strcmp(cur_opt, "empty-lost-and-found-off")){ - options->empty_lost_and_found = 0; - options->empty_lost_and_found_overridden=1; - } else if (!strcmp(cur_opt, "empty-lost-and-found-on")){ - options->empty_lost_and_found = 1; - options->empty_lost_and_found_overridden=1; - } else if (!strcmp(cur_opt, "no-cache")) - options->no_cache = 1; - else if (!strcmp(cur_opt, "no-checkpoint-read")) - options->skip_checkpoint_read = 1; - else if (!strcmp(cur_opt, "no-checkpoint-write")) - options->skip_checkpoint_write = 1; - else if (!strcmp(cur_opt, "no-checkpoint")) { - options->skip_checkpoint_read = 1; - options->skip_checkpoint_write = 1; - } else { - printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n", - cur_opt); - error = 1; - } - } - - return error; -} - -static struct super_block *yaffs_internal_read_super(int yaffsVersion, - struct super_block *sb, - void *data, int silent) -{ - int nBlocks; - struct inode *inode = NULL; - struct dentry *root; - yaffs_Device *dev = 0; - char devname_buf[BDEVNAME_SIZE + 1]; - struct mtd_info *mtd; - int err; - char *data_str = (char *)data; - struct yaffs_LinuxContext *context = NULL; - yaffs_DeviceParam *param; - - yaffs_options options; - - sb->s_magic = YAFFS_MAGIC; - sb->s_op = &yaffs_super_ops; - sb->s_flags |= MS_NOATIME; - -#ifdef YAFFS_COMPILE_EXPORTFS - sb->s_export_op = &yaffs_export_ops; -#endif - - if (!sb) - printk(KERN_INFO "yaffs: sb is NULL\n"); - else if (!sb->s_dev) - printk(KERN_INFO "yaffs: sb->s_dev is NULL\n"); - else if (!yaffs_devname(sb, devname_buf)) - printk(KERN_INFO "yaffs: devname is NULL\n"); - else - printk(KERN_INFO "yaffs: dev is %d name is \"%s\"\n", - sb->s_dev, - yaffs_devname(sb, devname_buf)); - - if (!data_str) - data_str = ""; - - printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str); - - memset(&options, 0, sizeof(options)); - - if (yaffs_parse_options(&options, data_str)) { - /* Option parsing failed */ - return NULL; - } - - - sb->s_blocksize = PAGE_CACHE_SIZE; - sb->s_blocksize_bits = PAGE_CACHE_SHIFT; - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_read_super: Using yaffs%d\n"), yaffsVersion)); - T(YAFFS_TRACE_OS, - (TSTR("yaffs_read_super: block size %d\n"), - (int)(sb->s_blocksize))); - - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Attempting MTD mount of %u.%u,\"%s\"\n"), - MAJOR(sb->s_dev), MINOR(sb->s_dev), - yaffs_devname(sb, devname_buf))); - - /* Check it's an mtd device..... */ - if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) - return NULL; /* This isn't an mtd device */ - - /* Get the device */ - mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); - if (!mtd) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device #%u doesn't appear to exist\n"), - MINOR(sb->s_dev))); - return NULL; - } - /* Check it's NAND */ - if (mtd->type != MTD_NANDFLASH) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device is not NAND it's type %d\n"), - mtd->type)); - return NULL; - } - - T(YAFFS_TRACE_OS, (TSTR(" erase %p\n"), mtd->erase)); - T(YAFFS_TRACE_OS, (TSTR(" read %p\n"), mtd->read)); - T(YAFFS_TRACE_OS, (TSTR(" write %p\n"), mtd->write)); - T(YAFFS_TRACE_OS, (TSTR(" readoob %p\n"), mtd->read_oob)); - T(YAFFS_TRACE_OS, (TSTR(" writeoob %p\n"), mtd->write_oob)); - T(YAFFS_TRACE_OS, (TSTR(" block_isbad %p\n"), mtd->block_isbad)); - T(YAFFS_TRACE_OS, (TSTR(" block_markbad %p\n"), mtd->block_markbad)); - T(YAFFS_TRACE_OS, (TSTR(" %s %d\n"), WRITE_SIZE_STR, WRITE_SIZE(mtd))); - T(YAFFS_TRACE_OS, (TSTR(" oobsize %d\n"), mtd->oobsize)); - T(YAFFS_TRACE_OS, (TSTR(" erasesize %d\n"), mtd->erasesize)); -#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 29) - T(YAFFS_TRACE_OS, (TSTR(" size %u\n"), mtd->size)); -#else - T(YAFFS_TRACE_OS, (TSTR(" size %lld\n"), mtd->size)); -#endif - -#ifdef CONFIG_YAFFS_AUTO_YAFFS2 - - if (yaffsVersion == 1 && WRITE_SIZE(mtd) >= 2048) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: auto selecting yaffs2\n"))); - yaffsVersion = 2; - } - - /* Added NCB 26/5/2006 for completeness */ - if (yaffsVersion == 2 && !options.inband_tags && WRITE_SIZE(mtd) == 512) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: auto selecting yaffs1\n"))); - yaffsVersion = 1; - } - -#endif - - if (yaffsVersion == 2) { - /* Check for version 2 style functions */ - if (!mtd->erase || - !mtd->block_isbad || - !mtd->block_markbad || - !mtd->read || - !mtd->write || -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) - !mtd->read_oob || !mtd->write_oob) { -#else - !mtd->write_ecc || - !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { -#endif - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not support required " - "functions\n"))); - return NULL; - } - - if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE || - mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && - !options.inband_tags) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not have the " - "right page sizes\n"))); - return NULL; - } - } else { - /* Check for V1 style functions */ - if (!mtd->erase || - !mtd->read || - !mtd->write || -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) - !mtd->read_oob || !mtd->write_oob) { -#else - !mtd->write_ecc || - !mtd->read_ecc || !mtd->read_oob || !mtd->write_oob) { -#endif - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not support required " - "functions\n"))); - return NULL; - } - - if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || - mtd->oobsize != YAFFS_BYTES_PER_SPARE) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: MTD device does not support have the " - "right page sizes\n"))); - return NULL; - } - } - - /* OK, so if we got here, we have an MTD that's NAND and looks - * like it has the right capabilities - * Set the yaffs_Device up for mtd - */ - - dev = kmalloc(sizeof(yaffs_Device), GFP_KERNEL); - context = kmalloc(sizeof(struct yaffs_LinuxContext),GFP_KERNEL); - - if(!dev || !context ){ - if(dev) - kfree(dev); - if(context) - kfree(context); - dev = NULL; - context = NULL; - } - - if (!dev) { - /* Deep shit could not allocate device structure */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_read_super: Failed trying to allocate " - "yaffs_Device. \n"))); - return NULL; - } - memset(dev, 0, sizeof(yaffs_Device)); - param = &(dev->param); - - memset(context,0,sizeof(struct yaffs_LinuxContext)); - dev->context = context; - YINIT_LIST_HEAD(&(context->contextList)); - context->dev = dev; - context->superBlock = sb; - - - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) - sb->s_fs_info = dev; -#else - sb->u.generic_sbp = dev; -#endif - - yaffs_DeviceToContext(dev)->mtd = mtd; - param->name = mtd->name; - - /* Set up the memory size parameters.... */ - - nBlocks = YCALCBLOCKS(mtd->size, (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK)); - - param->startBlock = 0; - param->endBlock = nBlocks - 1; - param->nChunksPerBlock = YAFFS_CHUNKS_PER_BLOCK; - param->totalBytesPerChunk = YAFFS_BYTES_PER_CHUNK; - param->nReservedBlocks = 5; - param->nShortOpCaches = (options.no_cache) ? 0 : 10; - param->inbandTags = options.inband_tags; - -#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD - param->disableLazyLoad = 1; -#endif - if(options.lazy_loading_overridden) - param->disableLazyLoad = !options.lazy_loading_enabled; - -#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC - param->noTagsECC = 1; -#endif - -#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND -#else - param->deferDirectoryUpdate = 1; -#endif - - if(options.tags_ecc_overridden) - param->noTagsECC = !options.tags_ecc_on; - -#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND - param->emptyLostAndFound = 1; -#endif - -#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING - param->refreshPeriod = 0; -#else - param->refreshPeriod = 500; -#endif - - if(options.empty_lost_and_found_overridden) - param->emptyLostAndFound = options.empty_lost_and_found; - - /* ... and the functions. */ - if (yaffsVersion == 2) { - param->writeChunkWithTagsToNAND = - nandmtd2_WriteChunkWithTagsToNAND; - param->readChunkWithTagsFromNAND = - nandmtd2_ReadChunkWithTagsFromNAND; - param->markNANDBlockBad = nandmtd2_MarkNANDBlockBad; - param->queryNANDBlock = nandmtd2_QueryNANDBlock; - yaffs_DeviceToContext(dev)->spareBuffer = YMALLOC(mtd->oobsize); - param->isYaffs2 = 1; -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) - param->totalBytesPerChunk = mtd->writesize; - param->nChunksPerBlock = mtd->erasesize / mtd->writesize; -#else - param->totalBytesPerChunk = mtd->oobblock; - param->nChunksPerBlock = mtd->erasesize / mtd->oobblock; -#endif - nBlocks = YCALCBLOCKS(mtd->size, mtd->erasesize); - - param->startBlock = 0; - param->endBlock = nBlocks - 1; - } else { -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) - /* use the MTD interface in yaffs_mtdif1.c */ - param->writeChunkWithTagsToNAND = - nandmtd1_WriteChunkWithTagsToNAND; - param->readChunkWithTagsFromNAND = - nandmtd1_ReadChunkWithTagsFromNAND; - param->markNANDBlockBad = nandmtd1_MarkNANDBlockBad; - param->queryNANDBlock = nandmtd1_QueryNANDBlock; -#else - param->writeChunkToNAND = nandmtd_WriteChunkToNAND; - param->readChunkFromNAND = nandmtd_ReadChunkFromNAND; -#endif - param->isYaffs2 = 0; - } - /* ... and common functions */ - param->eraseBlockInNAND = nandmtd_EraseBlockInNAND; - param->initialiseNAND = nandmtd_InitialiseNAND; - - yaffs_DeviceToContext(dev)->putSuperFunc = yaffs_MTDPutSuper; - - param->markSuperBlockDirty = yaffs_MarkSuperBlockDirty; - param->gcControl = yaffs_gc_control_callback; - - yaffs_DeviceToContext(dev)->superBlock= sb; - - -#ifndef CONFIG_YAFFS_DOES_ECC - param->useNANDECC = 1; -#endif - -#ifdef CONFIG_YAFFS_DISABLE_WIDE_TNODES - param->wideTnodesDisabled = 1; -#endif - - param->skipCheckpointRead = options.skip_checkpoint_read; - param->skipCheckpointWrite = options.skip_checkpoint_write; - - /* we assume this is protected by lock_kernel() in mount/umount */ - down(&yaffs_context_lock); - ylist_add_tail(&(yaffs_DeviceToContext(dev)->contextList), &yaffs_context_list); - up(&yaffs_context_lock); - - /* Directory search handling...*/ - YINIT_LIST_HEAD(&(yaffs_DeviceToContext(dev)->searchContexts)); - param->removeObjectCallback = yaffs_RemoveObjectCallback; - - init_MUTEX(&(yaffs_DeviceToContext(dev)->grossLock)); - - yaffs_GrossLock(dev); - - err = yaffs_GutsInitialise(dev); - - T(YAFFS_TRACE_OS, - (TSTR("yaffs_read_super: guts initialised %s\n"), - (err == YAFFS_OK) ? "OK" : "FAILED")); - - if(err == YAFFS_OK) - yaffs_BackgroundStart(dev); - - if(!context->bgThread) - param->deferDirectoryUpdate = 0; - - - /* Release lock before yaffs_get_inode() */ - yaffs_GrossUnlock(dev); - - /* Create root inode */ - if (err == YAFFS_OK) - inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, - yaffs_Root(dev)); - - if (!inode) - return NULL; - - inode->i_op = &yaffs_dir_inode_operations; - inode->i_fop = &yaffs_dir_operations; - - T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: got root inode\n"))); - - root = d_alloc_root(inode); - - T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: d_alloc_root done\n"))); - - if (!root) { - iput(inode); - return NULL; - } - sb->s_root = root; - sb->s_dirt = !dev->isCheckpointed; - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_read_super: isCheckpointed %d\n"), - dev->isCheckpointed)); - - T(YAFFS_TRACE_OS, (TSTR("yaffs_read_super: done\n"))); - return sb; -} - - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data, - int silent) -{ - return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL; -} - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs_read_super(struct file_system_type *fs, - int flags, const char *dev_name, - void *data, struct vfsmount *mnt) -{ - - return get_sb_bdev(fs, flags, dev_name, data, - yaffs_internal_read_super_mtd, mnt); -} -#else -static struct super_block *yaffs_read_super(struct file_system_type *fs, - int flags, const char *dev_name, - void *data) -{ - - return get_sb_bdev(fs, flags, dev_name, data, - yaffs_internal_read_super_mtd); -} -#endif - -static struct file_system_type yaffs_fs_type = { - .owner = THIS_MODULE, - .name = "yaffs", - .get_sb = yaffs_read_super, - .kill_sb = kill_block_super, - .fs_flags = FS_REQUIRES_DEV, -}; -#else -static struct super_block *yaffs_read_super(struct super_block *sb, void *data, - int silent) -{ - return yaffs_internal_read_super(1, sb, data, silent); -} - -static DECLARE_FSTYPE(yaffs_fs_type, "yaffs", yaffs_read_super, - FS_REQUIRES_DEV); -#endif - - -#ifdef CONFIG_YAFFS_YAFFS2 - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) -static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, - int silent) -{ - return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL; -} - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) -static int yaffs2_read_super(struct file_system_type *fs, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) -{ - return get_sb_bdev(fs, flags, dev_name, data, - yaffs2_internal_read_super_mtd, mnt); -} -#else -static struct super_block *yaffs2_read_super(struct file_system_type *fs, - int flags, const char *dev_name, - void *data) -{ - - return get_sb_bdev(fs, flags, dev_name, data, - yaffs2_internal_read_super_mtd); -} -#endif - -static struct file_system_type yaffs2_fs_type = { - .owner = THIS_MODULE, - .name = "yaffs2", - .get_sb = yaffs2_read_super, - .kill_sb = kill_block_super, - .fs_flags = FS_REQUIRES_DEV, -}; -#else -static struct super_block *yaffs2_read_super(struct super_block *sb, - void *data, int silent) -{ - return yaffs_internal_read_super(2, sb, data, silent); -} - -static DECLARE_FSTYPE(yaffs2_fs_type, "yaffs2", yaffs2_read_super, - FS_REQUIRES_DEV); -#endif - -#endif /* CONFIG_YAFFS_YAFFS2 */ - -static struct proc_dir_entry *my_proc_entry; -static struct proc_dir_entry *debug_proc_entry; - -static char *yaffs_dump_dev_part0(char *buf, yaffs_Device * dev) -{ - buf += sprintf(buf, "startBlock......... %d\n", dev->param.startBlock); - buf += sprintf(buf, "endBlock........... %d\n", dev->param.endBlock); - buf += sprintf(buf, "totalBytesPerChunk. %d\n", dev->param.totalBytesPerChunk); - buf += sprintf(buf, "useNANDECC......... %d\n", dev->param.useNANDECC); - buf += sprintf(buf, "noTagsECC.......... %d\n", dev->param.noTagsECC); - buf += sprintf(buf, "isYaffs2........... %d\n", dev->param.isYaffs2); - buf += sprintf(buf, "inbandTags......... %d\n", dev->param.inbandTags); - buf += sprintf(buf, "emptyLostAndFound.. %d\n", dev->param.emptyLostAndFound); - buf += sprintf(buf, "disableLazyLoad.... %d\n", dev->param.disableLazyLoad); - buf += sprintf(buf, "refreshPeriod...... %d\n", dev->param.refreshPeriod); - buf += sprintf(buf, "nShortOpCaches..... %d\n", dev->param.nShortOpCaches); - buf += sprintf(buf, "nReservedBlocks.... %d\n", dev->param.nReservedBlocks); - - buf += sprintf(buf, "\n"); - - return buf; -} - - -static char *yaffs_dump_dev_part1(char *buf, yaffs_Device * dev) -{ - buf += sprintf(buf, "nDataBytesPerChunk. %d\n", dev->nDataBytesPerChunk); - buf += sprintf(buf, "chunkGroupBits..... %d\n", dev->chunkGroupBits); - buf += sprintf(buf, "chunkGroupSize..... %d\n", dev->chunkGroupSize); - buf += sprintf(buf, "nErasedBlocks...... %d\n", dev->nErasedBlocks); - buf += sprintf(buf, "blocksInCheckpoint. %d\n", dev->blocksInCheckpoint); - buf += sprintf(buf, "\n"); - buf += sprintf(buf, "nTnodesCreated..... %d\n", dev->nTnodesCreated); - buf += sprintf(buf, "nFreeTnodes........ %d\n", dev->nFreeTnodes); - buf += sprintf(buf, "nObjectsCreated.... %d\n", dev->nObjectsCreated); - buf += sprintf(buf, "nFreeObjects....... %d\n", dev->nFreeObjects); - buf += sprintf(buf, "nFreeChunks........ %d\n", dev->nFreeChunks); - buf += sprintf(buf, "\n"); - buf += sprintf(buf, "nPageWrites........ %u\n", dev->nPageWrites); - buf += sprintf(buf, "nPageReads......... %u\n", dev->nPageReads); - buf += sprintf(buf, "nBlockErasures..... %u\n", dev->nBlockErasures); - buf += sprintf(buf, "nGCCopies.......... %u\n", dev->nGCCopies); - buf += sprintf(buf, "allGCs............. %u\n", dev->allGCs); - buf += sprintf(buf, "passiveGCs......... %u\n", dev->passiveGCs); - buf += sprintf(buf, "oldestDirtyGCs..... %u\n", dev->oldestDirtyGCs); - buf += sprintf(buf, "backgroundGCs...... %u\n", dev->backgroundGCs); - buf += sprintf(buf, "nRetriedWrites..... %u\n", dev->nRetriedWrites); - buf += sprintf(buf, "nRetireBlocks...... %u\n", dev->nRetiredBlocks); - buf += sprintf(buf, "eccFixed........... %u\n", dev->eccFixed); - buf += sprintf(buf, "eccUnfixed......... %u\n", dev->eccUnfixed); - buf += sprintf(buf, "tagsEccFixed....... %u\n", dev->tagsEccFixed); - buf += sprintf(buf, "tagsEccUnfixed..... %u\n", dev->tagsEccUnfixed); - buf += sprintf(buf, "cacheHits.......... %u\n", dev->cacheHits); - buf += sprintf(buf, "nDeletedFiles...... %u\n", dev->nDeletedFiles); - buf += sprintf(buf, "nUnlinkedFiles..... %u\n", dev->nUnlinkedFiles); - buf += sprintf(buf, "refreshCount....... %u\n", dev->refreshCount); - buf += - sprintf(buf, "nBackgroudDeletions %u\n", dev->nBackgroundDeletions); - - return buf; -} - -static int yaffs_proc_read(char *page, - char **start, - off_t offset, int count, int *eof, void *data) -{ - struct ylist_head *item; - char *buf = page; - int step = offset; - int n = 0; - - /* Get proc_file_read() to step 'offset' by one on each sucessive call. - * We use 'offset' (*ppos) to indicate where we are in devList. - * This also assumes the user has posted a read buffer large - * enough to hold the complete output; but that's life in /proc. - */ - - *(int *)start = 1; - - /* Print header first */ - if (step == 0) - buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__"\n"); - else if (step == 1) - buf += sprintf(buf,"\n"); - else { - step-=2; - - down(&yaffs_context_lock); - - /* Locate and print the Nth entry. Order N-squared but N is small. */ - ylist_for_each(item, &yaffs_context_list) { - struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList); - yaffs_Device *dev = dc->dev; - - if (n < (step & ~1)) { - n+=2; - continue; - } - if((step & 1)==0){ - buf += sprintf(buf, "\nDevice %d \"%s\"\n", n, dev->param.name); - buf = yaffs_dump_dev_part0(buf, dev); - } else - buf = yaffs_dump_dev_part1(buf, dev); - - break; - } - up(&yaffs_context_lock); - } - - return buf - page < count ? buf - page : count; -} - -static int yaffs_stats_proc_read(char *page, - char **start, - off_t offset, int count, int *eof, void *data) -{ - struct ylist_head *item; - char *buf = page; - int n = 0; - - down(&yaffs_context_lock); - - /* Locate and print the Nth entry. Order N-squared but N is small. */ - ylist_for_each(item, &yaffs_context_list) { - struct yaffs_LinuxContext *dc = ylist_entry(item, struct yaffs_LinuxContext, contextList); - yaffs_Device *dev = dc->dev; - - int erasedChunks; - int nObjects; - int nTnodes; - - erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock; - nObjects = dev->nObjectsCreated -dev->nFreeObjects; - nTnodes = dev->nTnodesCreated - dev->nFreeTnodes; - - - buf += sprintf(buf,"%d, %d, %d, %u, %u, %d, %d\n", - n, dev->nFreeChunks, erasedChunks, - dev->backgroundGCs, dev->oldestDirtyGCs, - nObjects, nTnodes); - } - up(&yaffs_context_lock); - - - return buf - page < count ? buf - page : count; -} - -/** - * Set the verbosity of the warnings and error messages. - * - * Note that the names can only be a..z or _ with the current code. - */ - -static struct { - char *mask_name; - unsigned mask_bitfield; -} mask_flags[] = { - {"allocate", YAFFS_TRACE_ALLOCATE}, - {"always", YAFFS_TRACE_ALWAYS}, - {"background", YAFFS_TRACE_BACKGROUND}, - {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, - {"buffers", YAFFS_TRACE_BUFFERS}, - {"bug", YAFFS_TRACE_BUG}, - {"checkpt", YAFFS_TRACE_CHECKPOINT}, - {"deletion", YAFFS_TRACE_DELETION}, - {"erase", YAFFS_TRACE_ERASE}, - {"error", YAFFS_TRACE_ERROR}, - {"gc_detail", YAFFS_TRACE_GC_DETAIL}, - {"gc", YAFFS_TRACE_GC}, - {"lock", YAFFS_TRACE_LOCK}, - {"mtd", YAFFS_TRACE_MTD}, - {"nandaccess", YAFFS_TRACE_NANDACCESS}, - {"os", YAFFS_TRACE_OS}, - {"scan_debug", YAFFS_TRACE_SCAN_DEBUG}, - {"scan", YAFFS_TRACE_SCAN}, - {"tracing", YAFFS_TRACE_TRACING}, - {"sync", YAFFS_TRACE_SYNC}, - {"write", YAFFS_TRACE_WRITE}, - - {"verify", YAFFS_TRACE_VERIFY}, - {"verify_nand", YAFFS_TRACE_VERIFY_NAND}, - {"verify_full", YAFFS_TRACE_VERIFY_FULL}, - {"verify_all", YAFFS_TRACE_VERIFY_ALL}, - - {"all", 0xffffffff}, - {"none", 0}, - {NULL, 0}, -}; - -#define MAX_MASK_NAME_LENGTH 40 -static int yaffs_proc_write_trace_options(struct file *file, const char *buf, - unsigned long count, void *data) -{ - unsigned rg = 0, mask_bitfield; - char *end; - char *mask_name; - const char *x; - char substring[MAX_MASK_NAME_LENGTH + 1]; - int i; - int done = 0; - int add, len = 0; - int pos = 0; - - rg = yaffs_traceMask; - - while (!done && (pos < count)) { - done = 1; - while ((pos < count) && isspace(buf[pos])) - pos++; - - switch (buf[pos]) { - case '+': - case '-': - case '=': - add = buf[pos]; - pos++; - break; - - default: - add = ' '; - break; - } - mask_name = NULL; - - mask_bitfield = simple_strtoul(buf + pos, &end, 0); - - if (end > buf + pos) { - mask_name = "numeral"; - len = end - (buf + pos); - pos += len; - done = 0; - } else { - for (x = buf + pos, i = 0; - (*x == '_' || (*x >= 'a' && *x <= 'z')) && - i < MAX_MASK_NAME_LENGTH; x++, i++, pos++) - substring[i] = *x; - substring[i] = '\0'; - - for (i = 0; mask_flags[i].mask_name != NULL; i++) { - if (strcmp(substring, mask_flags[i].mask_name) == 0) { - mask_name = mask_flags[i].mask_name; - mask_bitfield = mask_flags[i].mask_bitfield; - done = 0; - break; - } - } - } - - if (mask_name != NULL) { - done = 0; - switch (add) { - case '-': - rg &= ~mask_bitfield; - break; - case '+': - rg |= mask_bitfield; - break; - case '=': - rg = mask_bitfield; - break; - default: - rg |= mask_bitfield; - break; - } - } - } - - yaffs_traceMask = rg | YAFFS_TRACE_ALWAYS; - - printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_traceMask); - - if (rg & YAFFS_TRACE_ALWAYS) { - for (i = 0; mask_flags[i].mask_name != NULL; i++) { - char flag; - flag = ((rg & mask_flags[i].mask_bitfield) == - mask_flags[i].mask_bitfield) ? '+' : '-'; - printk(KERN_DEBUG "%c%s\n", flag, mask_flags[i].mask_name); - } - } - - return count; -} - - -static int yaffs_proc_write(struct file *file, const char *buf, - unsigned long count, void *data) -{ - return yaffs_proc_write_trace_options(file, buf, count, data); -} - -/* Stuff to handle installation of file systems */ -struct file_system_to_install { - struct file_system_type *fst; - int installed; -}; - -static struct file_system_to_install fs_to_install[] = { - {&yaffs_fs_type, 0}, - {&yaffs2_fs_type, 0}, - {NULL, 0} -}; - -static int __init init_yaffs_fs(void) -{ - int error = 0; - struct file_system_to_install *fsinst; - - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs built " __DATE__ " " __TIME__ " Installing. \n"))); - -#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - T(YAFFS_TRACE_ALWAYS, - (TSTR(" \n\n\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n\n"))); -#endif - - - - - init_MUTEX(&yaffs_context_lock); - - /* Install the proc_fs entries */ - my_proc_entry = create_proc_entry("yaffs", - S_IRUGO | S_IFREG, - YPROC_ROOT); - - if (my_proc_entry) { - my_proc_entry->write_proc = yaffs_proc_write; - my_proc_entry->read_proc = yaffs_proc_read; - my_proc_entry->data = NULL; - } else - return -ENOMEM; - - debug_proc_entry = create_proc_entry("yaffs_stats", - S_IRUGO | S_IFREG, - YPROC_ROOT); - - if (debug_proc_entry) { - debug_proc_entry->write_proc = NULL; - debug_proc_entry->read_proc = yaffs_stats_proc_read; - debug_proc_entry->data = NULL; - } else - return -ENOMEM; - - /* Now add the file system entries */ - - fsinst = fs_to_install; - - while (fsinst->fst && !error) { - error = register_filesystem(fsinst->fst); - if (!error) - fsinst->installed = 1; - fsinst++; - } - - /* Any errors? uninstall */ - if (error) { - fsinst = fs_to_install; - - while (fsinst->fst) { - if (fsinst->installed) { - unregister_filesystem(fsinst->fst); - fsinst->installed = 0; - } - fsinst++; - } - } - - return error; -} - -static void __exit exit_yaffs_fs(void) -{ - - struct file_system_to_install *fsinst; - - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs built " __DATE__ " " __TIME__ " removing. \n"))); - - remove_proc_entry("yaffs", YPROC_ROOT); - remove_proc_entry("yaffs_stats", YPROC_ROOT); - - fsinst = fs_to_install; - - while (fsinst->fst) { - if (fsinst->installed) { - unregister_filesystem(fsinst->fst); - fsinst->installed = 0; - } - fsinst++; - } -} - -module_init(init_yaffs_fs) -module_exit(exit_yaffs_fs) - -MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); -MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010"); -MODULE_LICENSE("GPL"); diff --git a/fs/yaffs2/yaffs_getblockinfo.h b/fs/yaffs2/yaffs_getblockinfo.h index 71fe1deea3c..d87acbde997 100644 --- a/fs/yaffs2/yaffs_getblockinfo.h +++ b/fs/yaffs2/yaffs_getblockinfo.h @@ -20,16 +20,16 @@ #include "yaffs_trace.h" /* Function to manipulate block info */ -static Y_INLINE yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device * dev, int blk) +static inline struct yaffs_block_info *yaffs_get_block_info(struct yaffs_dev + *dev, int blk) { - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>> yaffs: getBlockInfo block %d is not valid" TENDSTR), - blk)); + if (blk < dev->internal_start_block || blk > dev->internal_end_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs: get_block_info block %d is not valid", + blk); YBUG(); } - return &dev->blockInfo[blk - dev->internalStartBlock]; + return &dev->block_info[blk - dev->internal_start_block]; } #endif diff --git a/fs/yaffs2/yaffs_guts.c b/fs/yaffs2/yaffs_guts.c index 9509dd401a3..f4ae9deed72 100644 --- a/fs/yaffs2/yaffs_guts.c +++ b/fs/yaffs2/yaffs_guts.c @@ -10,149 +10,70 @@ * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ + #include "yportenv.h" #include "yaffs_trace.h" -#include "yaffsinterface.h" #include "yaffs_guts.h" #include "yaffs_tagsvalidity.h" #include "yaffs_getblockinfo.h" #include "yaffs_tagscompat.h" -#ifndef CONFIG_YAFFS_USE_OWN_SORT -#include "yaffs_qsort.h" -#endif + #include "yaffs_nand.h" -#include "yaffs_checkptrw.h" +#include "yaffs_yaffs1.h" +#include "yaffs_yaffs2.h" +#include "yaffs_bitmap.h" +#include "yaffs_verify.h" #include "yaffs_nand.h" #include "yaffs_packedtags2.h" +#include "yaffs_nameval.h" +#include "yaffs_allocator.h" + +#include "yaffs_attribs.h" /* Note YAFFS_GC_GOOD_ENOUGH must be <= YAFFS_GC_PASSIVE_THRESHOLD */ #define YAFFS_GC_GOOD_ENOUGH 2 #define YAFFS_GC_PASSIVE_THRESHOLD 4 -#define YAFFS_SMALL_HOLE_THRESHOLD 3 - -/* - * Checkpoints are really no benefit on very small partitions. - * - * To save space on small partitions don't bother with checkpoints unless - * the partition is at least this big. - */ -#define YAFFS_CHECKPOINT_MIN_BLOCKS 60 - #include "yaffs_ecc.h" +/* Forward declarations */ -/* Robustification (if it ever comes about...) */ -static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND); -static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND, - int erasedOk); -static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, - const __u8 *data, - const yaffs_ExtendedTags *tags); -static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, - const yaffs_ExtendedTags *tags); - -/* Other local prototypes */ -static void yaffs_UpdateParent(yaffs_Object *obj); -static int yaffs_UnlinkObject(yaffs_Object *obj); -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj); - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList); - -static int yaffs_WriteNewChunkWithTagsToNAND(yaffs_Device *dev, - const __u8 *buffer, - yaffs_ExtendedTags *tags, - int useReserve); -static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode, - int chunkInNAND, int inScan); - -static yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number, - yaffs_ObjectType type); -static void yaffs_AddObjectToDirectory(yaffs_Object *directory, - yaffs_Object *obj); -static int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, - int force, int isShrink, int shadows); -static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj); -static int yaffs_CheckStructures(void); -static int yaffs_DoGenericObjectDeletion(yaffs_Object *in); - -static yaffs_BlockInfo *yaffs_GetBlockInfo(yaffs_Device *dev, int blockNo); - - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND); - -static int yaffs_UnlinkWorker(yaffs_Object *obj); - -static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, - int chunkInObject); - -static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve, - yaffs_BlockInfo **blockUsedPtr); +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 * buffer, int n_bytes, int use_reserve); -static void yaffs_VerifyFreeChunks(yaffs_Device *dev); -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in); - -static void yaffs_VerifyDirectory(yaffs_Object *directory); -#ifdef YAFFS_PARANOID -static int yaffs_CheckFileSanity(yaffs_Object *in); -#else -#define yaffs_CheckFileSanity(in) -#endif - -static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in); -static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId); - -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev); - -static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode, - yaffs_ExtendedTags *tags); - -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, - unsigned pos); -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev, - yaffs_FileStructure *fStruct, - __u32 chunkId); - -static int yaffs_HandleHole(yaffs_Object *obj, loff_t newSize); -static void yaffs_SkipRestOfBlock(yaffs_Device *dev); -static int yaffs_VerifyChunkWritten(yaffs_Device *dev, - int chunkInNAND, - const __u8 *data, - yaffs_ExtendedTags *tags); /* Function to calculate chunk and offset */ -static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut, - __u32 *offsetOut) +static void yaffs_addr_to_chunk(struct yaffs_dev *dev, loff_t addr, + int *chunk_out, u32 * offset_out) { int chunk; - __u32 offset; + u32 offset; - chunk = (__u32)(addr >> dev->chunkShift); + chunk = (u32) (addr >> dev->chunk_shift); - if (dev->chunkDiv == 1) { + if (dev->chunk_div == 1) { /* easy power of 2 case */ - offset = (__u32)(addr & dev->chunkMask); + offset = (u32) (addr & dev->chunk_mask); } else { /* Non power-of-2 case */ - loff_t chunkBase; + loff_t chunk_base; - chunk /= dev->chunkDiv; + chunk /= dev->chunk_div; - chunkBase = ((loff_t)chunk) * dev->nDataBytesPerChunk; - offset = (__u32)(addr - chunkBase); + chunk_base = ((loff_t) chunk) * dev->data_bytes_per_chunk; + offset = (u32) (addr - chunk_base); } - *chunkOut = chunk; - *offsetOut = offset; + *chunk_out = chunk; + *offset_out = offset; } /* Function to return the number of shifts for a power of 2 greater than or @@ -161,129 +82,124 @@ static void yaffs_AddrToChunk(yaffs_Device *dev, loff_t addr, int *chunkOut, * be hellishly efficient. */ -static __u32 ShiftsGE(__u32 x) +static u32 calc_shifts_ceiling(u32 x) { - int extraBits; - int nShifts; + int extra_bits; + int shifts; - nShifts = extraBits = 0; + shifts = extra_bits = 0; while (x > 1) { if (x & 1) - extraBits++; + extra_bits++; x >>= 1; - nShifts++; + shifts++; } - if (extraBits) - nShifts++; + if (extra_bits) + shifts++; - return nShifts; + return shifts; } /* Function to return the number of shifts to get a 1 in bit 0 */ -static __u32 Shifts(__u32 x) +static u32 calc_shifts(u32 x) { - __u32 nShifts; + u32 shifts; - nShifts = 0; + shifts = 0; if (!x) return 0; - while (!(x&1)) { + while (!(x & 1)) { x >>= 1; - nShifts++; + shifts++; } - return nShifts; + return shifts; } - - /* * Temporary buffer manipulations. */ -static int yaffs_InitialiseTempBuffers(yaffs_Device *dev) +static int yaffs_init_tmp_buffers(struct yaffs_dev *dev) { int i; - __u8 *buf = (__u8 *)1; + u8 *buf = (u8 *) 1; - memset(dev->tempBuffer, 0, sizeof(dev->tempBuffer)); + memset(dev->temp_buffer, 0, sizeof(dev->temp_buffer)); for (i = 0; buf && i < YAFFS_N_TEMP_BUFFERS; i++) { - dev->tempBuffer[i].line = 0; /* not in use */ - dev->tempBuffer[i].buffer = buf = - YMALLOC_DMA(dev->param.totalBytesPerChunk); + dev->temp_buffer[i].line = 0; /* not in use */ + dev->temp_buffer[i].buffer = buf = + kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); } return buf ? YAFFS_OK : YAFFS_FAIL; } -__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo) +u8 *yaffs_get_temp_buffer(struct yaffs_dev * dev, int line_no) { int i, j; - dev->tempInUse++; - if (dev->tempInUse > dev->maxTemp) - dev->maxTemp = dev->tempInUse; + dev->temp_in_use++; + if (dev->temp_in_use > dev->max_temp) + dev->max_temp = dev->temp_in_use; for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].line == 0) { - dev->tempBuffer[i].line = lineNo; - if ((i + 1) > dev->maxTemp) { - dev->maxTemp = i + 1; + if (dev->temp_buffer[i].line == 0) { + dev->temp_buffer[i].line = line_no; + if ((i + 1) > dev->max_temp) { + dev->max_temp = i + 1; for (j = 0; j <= i; j++) - dev->tempBuffer[j].maxLine = - dev->tempBuffer[j].line; + dev->temp_buffer[j].max_line = + dev->temp_buffer[j].line; } - return dev->tempBuffer[i].buffer; + return dev->temp_buffer[i].buffer; } } - T(YAFFS_TRACE_BUFFERS, - (TSTR("Out of temp buffers at line %d, other held by lines:"), - lineNo)); + yaffs_trace(YAFFS_TRACE_BUFFERS, + "Out of temp buffers at line %d, other held by lines:", + line_no); for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) - T(YAFFS_TRACE_BUFFERS, (TSTR(" %d "), dev->tempBuffer[i].line)); - - T(YAFFS_TRACE_BUFFERS, (TSTR(" " TENDSTR))); + yaffs_trace(YAFFS_TRACE_BUFFERS," %d", dev->temp_buffer[i].line); /* * If we got here then we have to allocate an unmanaged one * This is not good. */ - dev->unmanagedTempAllocations++; - return YMALLOC(dev->nDataBytesPerChunk); + dev->unmanaged_buffer_allocs++; + return kmalloc(dev->data_bytes_per_chunk, GFP_NOFS); } -void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, - int lineNo) +void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 * buffer, int line_no) { int i; - dev->tempInUse--; + dev->temp_in_use--; for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) { - dev->tempBuffer[i].line = 0; + if (dev->temp_buffer[i].buffer == buffer) { + dev->temp_buffer[i].line = 0; return; } } if (buffer) { /* assume it is an unmanaged one. */ - T(YAFFS_TRACE_BUFFERS, - (TSTR("Releasing unmanaged temp buffer in line %d" TENDSTR), - lineNo)); - YFREE(buffer); - dev->unmanagedTempDeallocations++; + yaffs_trace(YAFFS_TRACE_BUFFERS, + "Releasing unmanaged temp buffer in line %d", + line_no); + kfree(buffer); + dev->unmanaged_buffer_deallocs++; } } @@ -291,685 +207,334 @@ void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, /* * Determine if we have a managed buffer. */ -int yaffs_IsManagedTempBuffer(yaffs_Device *dev, const __u8 *buffer) +int yaffs_is_managed_tmp_buffer(struct yaffs_dev *dev, const u8 * buffer) { int i; for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) { - if (dev->tempBuffer[i].buffer == buffer) + if (dev->temp_buffer[i].buffer == buffer) return 1; } - for (i = 0; i < dev->param.nShortOpCaches; i++) { - if (dev->srCache[i].data == buffer) + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].data == buffer) return 1; } - if (buffer == dev->checkpointBuffer) + if (buffer == dev->checkpt_buffer) return 1; - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: unmaged buffer detected.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: unmaged buffer detected."); return 0; } - - /* - * Chunk bitmap manipulations + * Functions for robustisizing TODO + * */ -static Y_INLINE __u8 *yaffs_BlockBits(yaffs_Device *dev, int blk) +static void yaffs_handle_chunk_wr_ok(struct yaffs_dev *dev, int nand_chunk, + const u8 * data, + const struct yaffs_ext_tags *tags) { - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: BlockBits block %d is not valid" TENDSTR), - blk)); - YBUG(); - } - return dev->chunkBits + - (dev->chunkBitmapStride * (blk - dev->internalStartBlock)); + dev = dev; + nand_chunk = nand_chunk; + data = data; + tags = tags; } -static Y_INLINE void yaffs_VerifyChunkBitId(yaffs_Device *dev, int blk, int chunk) +static void yaffs_handle_chunk_update(struct yaffs_dev *dev, int nand_chunk, + const struct yaffs_ext_tags *tags) { - if (blk < dev->internalStartBlock || blk > dev->internalEndBlock || - chunk < 0 || chunk >= dev->param.nChunksPerBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs: Chunk Id (%d:%d) invalid"TENDSTR), - blk, chunk)); - YBUG(); - } + dev = dev; + nand_chunk = nand_chunk; + tags = tags; } -static Y_INLINE void yaffs_ClearChunkBits(yaffs_Device *dev, int blk) +void yaffs_handle_chunk_error(struct yaffs_dev *dev, + struct yaffs_block_info *bi) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); + if (!bi->gc_prioritise) { + bi->gc_prioritise = 1; + dev->has_pending_prioritised_gc = 1; + bi->chunk_error_strikes++; - memset(blkBits, 0, dev->chunkBitmapStride); -} - -static Y_INLINE void yaffs_ClearChunkBit(yaffs_Device *dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - - yaffs_VerifyChunkBitId(dev, blk, chunk); - - blkBits[chunk / 8] &= ~(1 << (chunk & 7)); -} - -static Y_INLINE void yaffs_SetChunkBit(yaffs_Device *dev, int blk, int chunk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); + if (bi->chunk_error_strikes > 3) { + bi->needs_retiring = 1; /* Too many stikes, so retire this */ + yaffs_trace(YAFFS_TRACE_ALWAYS, "yaffs: Block struck out"); - yaffs_VerifyChunkBitId(dev, blk, chunk); - - blkBits[chunk / 8] |= (1 << (chunk & 7)); + } + } } -static Y_INLINE int yaffs_CheckChunkBit(yaffs_Device *dev, int blk, int chunk) +static void yaffs_handle_chunk_wr_error(struct yaffs_dev *dev, int nand_chunk, + int erased_ok) { - __u8 *blkBits = yaffs_BlockBits(dev, blk); - yaffs_VerifyChunkBitId(dev, blk, chunk); + int flash_block = nand_chunk / dev->param.chunks_per_block; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - return (blkBits[chunk / 8] & (1 << (chunk & 7))) ? 1 : 0; -} + yaffs_handle_chunk_error(dev, bi); -static Y_INLINE int yaffs_StillSomeChunkBits(yaffs_Device *dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - for (i = 0; i < dev->chunkBitmapStride; i++) { - if (*blkBits) - return 1; - blkBits++; + if (erased_ok) { + /* Was an actual write failure, so mark the block for retirement */ + bi->needs_retiring = 1; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d needs retiring", flash_block); } - return 0; -} -static int yaffs_CountChunkBits(yaffs_Device *dev, int blk) -{ - __u8 *blkBits = yaffs_BlockBits(dev, blk); - int i; - int n = 0; - for (i = 0; i < dev->chunkBitmapStride; i++) { - __u8 x = *blkBits; - while (x) { - if (x & 1) - n++; - x >>= 1; - } - - blkBits++; - } - return n; + /* Delete the chunk */ + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); } /* * Verification code */ -static int yaffs_SkipVerification(yaffs_Device *dev) -{ - dev=dev; - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); -} - -static int yaffs_SkipFullVerification(yaffs_Device *dev) -{ - dev=dev; - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_FULL)); -} +/* + * Simple hash function. Needs to have a reasonable spread + */ -static int yaffs_SkipNANDVerification(yaffs_Device *dev) +static inline int yaffs_hash_fn(int n) { - dev=dev; - return !(yaffs_traceMask & (YAFFS_TRACE_VERIFY_NAND)); + n = abs(n); + return n % YAFFS_NOBJECT_BUCKETS; } -static const char *blockStateName[] = { -"Unknown", -"Needs scanning", -"Scanning", -"Empty", -"Allocating", -"Full", -"Dirty", -"Checkpoint", -"Collecting", -"Dead" -}; +/* + * Access functions to useful fake objects. + * Note that root might have a presence in NAND if permissions are set. + */ -static void yaffs_VerifyBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, int n) +struct yaffs_obj *yaffs_root(struct yaffs_dev *dev) { - int actuallyUsed; - int inUse; - - if (yaffs_SkipVerification(dev)) - return; - - /* Report illegal runtime states */ - if (bi->blockState >= YAFFS_NUMBER_OF_BLOCK_STATES) - T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has undefined state %d"TENDSTR), n, bi->blockState)); - - switch (bi->blockState) { - case YAFFS_BLOCK_STATE_UNKNOWN: - case YAFFS_BLOCK_STATE_SCANNING: - case YAFFS_BLOCK_STATE_NEEDS_SCANNING: - T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has bad run-state %s"TENDSTR), - n, blockStateName[bi->blockState])); - } - - /* Check pages in use and soft deletions are legal */ - - actuallyUsed = bi->pagesInUse - bi->softDeletions; - - if (bi->pagesInUse < 0 || bi->pagesInUse > dev->param.nChunksPerBlock || - bi->softDeletions < 0 || bi->softDeletions > dev->param.nChunksPerBlock || - actuallyUsed < 0 || actuallyUsed > dev->param.nChunksPerBlock) - T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has illegal values pagesInUsed %d softDeletions %d"TENDSTR), - n, bi->pagesInUse, bi->softDeletions)); - - - /* Check chunk bitmap legal */ - inUse = yaffs_CountChunkBits(dev, n); - if (inUse != bi->pagesInUse) - T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has inconsistent values pagesInUse %d counted chunk bits %d"TENDSTR), - n, bi->pagesInUse, inUse)); - - /* Check that the sequence number is valid. - * Ten million is legal, but is very unlikely - */ - if (dev->param.isYaffs2 && - (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || bi->blockState == YAFFS_BLOCK_STATE_FULL) && - (bi->sequenceNumber < YAFFS_LOWEST_SEQUENCE_NUMBER || bi->sequenceNumber > 10000000)) - T(YAFFS_TRACE_VERIFY, (TSTR("Block %d has suspect sequence number of %d"TENDSTR), - n, bi->sequenceNumber)); + return dev->root_dir; } -static void yaffs_VerifyCollectedBlock(yaffs_Device *dev, yaffs_BlockInfo *bi, - int n) +struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev) { - yaffs_VerifyBlock(dev, bi, n); + return dev->lost_n_found; +} - /* After collection the block should be in the erased state */ - /* This will need to change if we do partial gc */ +/* + * Erased NAND checking functions + */ - if (bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && - bi->blockState != YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_ERROR, (TSTR("Block %d is in state %d after gc, should be erased"TENDSTR), - n, bi->blockState)); +int yaffs_check_ff(u8 * buffer, int n_bytes) +{ + /* Horrible, slow implementation */ + while (n_bytes--) { + if (*buffer != 0xFF) + return 0; + buffer++; } + return 1; } -static void yaffs_VerifyBlocks(yaffs_Device *dev) +static int yaffs_check_chunk_erased(struct yaffs_dev *dev, int nand_chunk) { - int i; - int nBlocksPerState[YAFFS_NUMBER_OF_BLOCK_STATES]; - int nIllegalBlockStates = 0; - - if (yaffs_SkipVerification(dev)) - return; + int retval = YAFFS_OK; + u8 *data = yaffs_get_temp_buffer(dev, __LINE__); + struct yaffs_ext_tags tags; + int result; - memset(nBlocksPerState, 0, sizeof(nBlocksPerState)); + result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, data, &tags); - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, i); - yaffs_VerifyBlock(dev, bi, i); + if (tags.ecc_result > YAFFS_ECC_RESULT_NO_ERROR) + retval = YAFFS_FAIL; - if (bi->blockState < YAFFS_NUMBER_OF_BLOCK_STATES) - nBlocksPerState[bi->blockState]++; - else - nIllegalBlockStates++; + if (!yaffs_check_ff(data, dev->data_bytes_per_chunk) || + tags.chunk_used) { + yaffs_trace(YAFFS_TRACE_NANDACCESS, "Chunk %d not erased", nand_chunk); + retval = YAFFS_FAIL; } - T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR))); - T(YAFFS_TRACE_VERIFY, (TSTR("Block summary"TENDSTR))); - - T(YAFFS_TRACE_VERIFY, (TSTR("%d blocks have illegal states"TENDSTR), nIllegalBlockStates)); - if (nBlocksPerState[YAFFS_BLOCK_STATE_ALLOCATING] > 1) - T(YAFFS_TRACE_VERIFY, (TSTR("Too many allocating blocks"TENDSTR))); - - for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) - T(YAFFS_TRACE_VERIFY, - (TSTR("%s %d blocks"TENDSTR), - blockStateName[i], nBlocksPerState[i])); + yaffs_release_temp_buffer(dev, data, __LINE__); - if (dev->blocksInCheckpoint != nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Checkpoint block count wrong dev %d count %d"TENDSTR), - dev->blocksInCheckpoint, nBlocksPerState[YAFFS_BLOCK_STATE_CHECKPOINT])); - - if (dev->nErasedBlocks != nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY]) - T(YAFFS_TRACE_VERIFY, - (TSTR("Erased block count wrong dev %d count %d"TENDSTR), - dev->nErasedBlocks, nBlocksPerState[YAFFS_BLOCK_STATE_EMPTY])); - - if (nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING] > 1) - T(YAFFS_TRACE_VERIFY, - (TSTR("Too many collecting blocks %d (max is 1)"TENDSTR), - nBlocksPerState[YAFFS_BLOCK_STATE_COLLECTING])); - - T(YAFFS_TRACE_VERIFY, (TSTR(""TENDSTR))); + return retval; } -/* - * Verify the object header. oh must be valid, but obj and tags may be NULL in which - * case those tests will not be performed. - */ -static void yaffs_VerifyObjectHeader(yaffs_Object *obj, yaffs_ObjectHeader *oh, yaffs_ExtendedTags *tags, int parentCheck) +static int yaffs_verify_chunk_written(struct yaffs_dev *dev, + int nand_chunk, + const u8 * data, + struct yaffs_ext_tags *tags) { - if (obj && yaffs_SkipVerification(obj->myDev)) - return; - - if (!(tags && obj && oh)) { - T(YAFFS_TRACE_VERIFY, - (TSTR("Verifying object header tags %p obj %p oh %p"TENDSTR), - tags, obj, oh)); - return; - } - - if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || - oh->type > YAFFS_OBJECT_TYPE_MAX) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header type is illegal value 0x%x"TENDSTR), - tags->objectId, oh->type)); - - if (tags->objectId != obj->objectId) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch objectId %d"TENDSTR), - tags->objectId, obj->objectId)); - - - /* - * Check that the object's parent ids match if parentCheck requested. - * - * Tests do not apply to the root object. - */ - - if (parentCheck && tags->objectId > 1 && !obj->parent) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d obj->parent is NULL"TENDSTR), - tags->objectId, oh->parentObjectId)); + int retval = YAFFS_OK; + struct yaffs_ext_tags temp_tags; + u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); + int result; - if (parentCheck && obj->parent && - oh->parentObjectId != obj->parent->objectId && - (oh->parentObjectId != YAFFS_OBJECTID_UNLINKED || - obj->parent->objectId != YAFFS_OBJECTID_DELETED)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header mismatch parentId %d parentObjectId %d"TENDSTR), - tags->objectId, oh->parentObjectId, obj->parent->objectId)); + result = yaffs_rd_chunk_tags_nand(dev, nand_chunk, buffer, &temp_tags); + if (memcmp(buffer, data, dev->data_bytes_per_chunk) || + temp_tags.obj_id != tags->obj_id || + temp_tags.chunk_id != tags->chunk_id || + temp_tags.n_bytes != tags->n_bytes) + retval = YAFFS_FAIL; - if (tags->objectId > 1 && oh->name[0] == 0) /* Null name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is NULL"TENDSTR), - obj->objectId)); + yaffs_release_temp_buffer(dev, buffer, __LINE__); - if (tags->objectId > 1 && ((__u8)(oh->name[0])) == 0xff) /* Trashed name */ - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d header name is 0xFF"TENDSTR), - obj->objectId)); + return retval; } -#if 0 -/* Not being used, but don't want to throw away yet */ -static int yaffs_VerifyTnodeWorker(yaffs_Object *obj, yaffs_Tnode *tn, - __u32 level, int chunkOffset) +int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks) { - int i; - yaffs_Device *dev = obj->myDev; - int ok = 1; + int reserved_chunks; + int reserved_blocks = dev->param.n_reserved_blocks; + int checkpt_blocks; - if (tn) { - if (level > 0) { - - for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { - if (tn->internal[i]) { - ok = yaffs_VerifyTnodeWorker(obj, - tn->internal[i], - level - 1, - (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); - } - } - } else if (level == 0) { - yaffs_ExtendedTags tags; - __u32 objectId = obj->objectId; - - chunkOffset <<= YAFFS_TNODES_LEVEL0_BITS; - - for (i = 0; i < YAFFS_NTNODES_LEVEL0; i++) { - __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i); + checkpt_blocks = yaffs_calc_checkpt_blocks_required(dev); - if (theChunk > 0) { - /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),tags.objectId,tags.chunkId,theChunk)); */ - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags); - if (tags.objectId != objectId || tags.chunkId != chunkOffset) { - T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), - objectId, chunkOffset, theChunk, - tags.objectId, tags.chunkId)); - } - } - chunkOffset++; - } - } - } - - return ok; + reserved_chunks = + ((reserved_blocks + checkpt_blocks) * dev->param.chunks_per_block); + return (dev->n_free_chunks > (reserved_chunks + n_chunks)); } -#endif - -static void yaffs_VerifyFile(yaffs_Object *obj) +static int yaffs_find_alloc_block(struct yaffs_dev *dev) { - int requiredTallness; - int actualTallness; - __u32 lastChunk; - __u32 x; - __u32 i; - yaffs_Device *dev; - yaffs_ExtendedTags tags; - yaffs_Tnode *tn; - __u32 objectId; - - if (!obj) - return; + int i; - if (yaffs_SkipVerification(obj->myDev)) - return; + struct yaffs_block_info *bi; - dev = obj->myDev; - objectId = obj->objectId; + if (dev->n_erased_blocks < 1) { + /* Hoosterman we've got a problem. + * Can't get space to gc + */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no more erased blocks" ); - /* Check file size is consistent with tnode depth */ - lastChunk = obj->variant.fileVariant.fileSize / dev->nDataBytesPerChunk + 1; - x = lastChunk >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; - while (x > 0) { - x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + return -1; } - actualTallness = obj->variant.fileVariant.topLevel; - - /* Check that the chunks in the tnode tree are all correct. - * We do this by scanning through the tnode tree and - * checking the tags for every chunk match. - */ + /* Find an empty block. */ - if (yaffs_SkipNANDVerification(dev)) - return; + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + dev->alloc_block_finder++; + if (dev->alloc_block_finder < dev->internal_start_block + || dev->alloc_block_finder > dev->internal_end_block) { + dev->alloc_block_finder = dev->internal_start_block; + } - for (i = 1; i <= lastChunk; i++) { - tn = yaffs_FindLevel0Tnode(dev, &obj->variant.fileVariant, i); - - if (tn) { - __u32 theChunk = yaffs_GetChunkGroupBase(dev, tn, i); - if (theChunk > 0) { - /* T(~0,(TSTR("verifying (%d:%d) %d"TENDSTR),objectId,i,theChunk)); */ - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, &tags); - if (tags.objectId != objectId || tags.chunkId != i) { - T(~0, (TSTR("Object %d chunkId %d NAND mismatch chunk %d tags (%d:%d)"TENDSTR), - objectId, i, theChunk, - tags.objectId, tags.chunkId)); - } - } + bi = yaffs_get_block_info(dev, dev->alloc_block_finder); + + if (bi->block_state == YAFFS_BLOCK_STATE_EMPTY) { + bi->block_state = YAFFS_BLOCK_STATE_ALLOCATING; + dev->seq_number++; + bi->seq_number = dev->seq_number; + dev->n_erased_blocks--; + yaffs_trace(YAFFS_TRACE_ALLOCATE, + "Allocated block %d, seq %d, %d left" , + dev->alloc_block_finder, dev->seq_number, + dev->n_erased_blocks); + return dev->alloc_block_finder; } } -} - - -static void yaffs_VerifyHardLink(yaffs_Object *obj) -{ - if (obj && yaffs_SkipVerification(obj->myDev)) - return; - - /* Verify sane equivalent object */ -} - -static void yaffs_VerifySymlink(yaffs_Object *obj) -{ - if (obj && yaffs_SkipVerification(obj->myDev)) - return; - /* Verify symlink string */ -} + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs tragedy: no more erased blocks, but there should have been %d", + dev->n_erased_blocks); -static void yaffs_VerifySpecial(yaffs_Object *obj) -{ - if (obj && yaffs_SkipVerification(obj->myDev)) - return; + return -1; } -static void yaffs_VerifyObject(yaffs_Object *obj) +static int yaffs_alloc_chunk(struct yaffs_dev *dev, int use_reserver, + struct yaffs_block_info **block_ptr) { - yaffs_Device *dev; - - __u32 chunkMin; - __u32 chunkMax; - - __u32 chunkIdOk; - __u32 chunkInRange; - __u32 chunkShouldNotBeDeleted; - __u32 chunkValid; - - if (!obj) - return; - - if (obj->beingCreated) - return; - - dev = obj->myDev; + int ret_val; + struct yaffs_block_info *bi; - if (yaffs_SkipVerification(dev)) - return; - - /* Check sane object header chunk */ - - chunkMin = dev->internalStartBlock * dev->param.nChunksPerBlock; - chunkMax = (dev->internalEndBlock+1) * dev->param.nChunksPerBlock - 1; - - chunkInRange = (((unsigned)(obj->hdrChunk)) >= chunkMin && ((unsigned)(obj->hdrChunk)) <= chunkMax); - chunkIdOk = chunkInRange || (obj->hdrChunk == 0); - chunkValid = chunkInRange && - yaffs_CheckChunkBit(dev, - obj->hdrChunk / dev->param.nChunksPerBlock, - obj->hdrChunk % dev->param.nChunksPerBlock); - chunkShouldNotBeDeleted = chunkInRange && !chunkValid; + if (dev->alloc_block < 0) { + /* Get next block to allocate off */ + dev->alloc_block = yaffs_find_alloc_block(dev); + dev->alloc_page = 0; + } - if (!obj->fake && - (!chunkIdOk || chunkShouldNotBeDeleted)) { - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has chunkId %d %s %s"TENDSTR), - obj->objectId, obj->hdrChunk, - chunkIdOk ? "" : ",out of range", - chunkShouldNotBeDeleted ? ",marked as deleted" : "")); + if (!use_reserver && !yaffs_check_alloc_available(dev, 1)) { + /* Not enough space to allocate unless we're allowed to use the reserve. */ + return -1; } - if (chunkValid && !yaffs_SkipNANDVerification(dev)) { - yaffs_ExtendedTags tags; - yaffs_ObjectHeader *oh; - __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); + if (dev->n_erased_blocks < dev->param.n_reserved_blocks + && dev->alloc_page == 0) + yaffs_trace(YAFFS_TRACE_ALLOCATE, "Allocating reserve"); - oh = (yaffs_ObjectHeader *)buffer; + /* Next page please.... */ + if (dev->alloc_block >= 0) { + bi = yaffs_get_block_info(dev, dev->alloc_block); - yaffs_ReadChunkWithTagsFromNAND(dev, obj->hdrChunk, buffer, - &tags); + ret_val = (dev->alloc_block * dev->param.chunks_per_block) + + dev->alloc_page; + bi->pages_in_use++; + yaffs_set_chunk_bit(dev, dev->alloc_block, dev->alloc_page); - yaffs_VerifyObjectHeader(obj, oh, &tags, 1); + dev->alloc_page++; - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - } + dev->n_free_chunks--; - /* Verify it has a parent */ - if (obj && !obj->fake && - (!obj->parent || obj->parent->myDev != dev)) { - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has parent pointer %p which does not look like an object"TENDSTR), - obj->objectId, obj->parent)); - } + /* If the block is full set the state to full */ + if (dev->alloc_page >= dev->param.chunks_per_block) { + bi->block_state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } - /* Verify parent is a directory */ - if (obj->parent && obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d's parent is not a directory (type %d)"TENDSTR), - obj->objectId, obj->parent->variantType)); - } + if (block_ptr) + *block_ptr = bi; - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - yaffs_VerifyFile(obj); - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - yaffs_VerifySymlink(obj); - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - yaffs_VerifyDirectory(obj); - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - yaffs_VerifyHardLink(obj); - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - yaffs_VerifySpecial(obj); - break; - case YAFFS_OBJECT_TYPE_UNKNOWN: - default: - T(YAFFS_TRACE_VERIFY, - (TSTR("Obj %d has illegaltype %d"TENDSTR), - obj->objectId, obj->variantType)); - break; + return ret_val; } -} -static void yaffs_VerifyObjects(yaffs_Device *dev) -{ - yaffs_Object *obj; - int i; - struct ylist_head *lh; - - if (yaffs_SkipVerification(dev)) - return; - - /* Iterate through the objects in each hash entry */ + yaffs_trace(YAFFS_TRACE_ERROR, "!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" ); - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - ylist_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = ylist_entry(lh, yaffs_Object, hashLink); - yaffs_VerifyObject(obj); - } - } - } + return -1; } - -/* - * Simple hash function. Needs to have a reasonable spread - */ - -static Y_INLINE int yaffs_HashFunction(int n) +static int yaffs_get_erased_chunks(struct yaffs_dev *dev) { - n = abs(n); - return n % YAFFS_NOBJECT_BUCKETS; -} + int n; -/* - * Access functions to useful fake objects. - * Note that root might have a presence in NAND if permissions are set. - */ + n = dev->n_erased_blocks * dev->param.chunks_per_block; -yaffs_Object *yaffs_Root(yaffs_Device *dev) -{ - return dev->rootDir; -} + if (dev->alloc_block > 0) + n += (dev->param.chunks_per_block - dev->alloc_page); -yaffs_Object *yaffs_LostNFound(yaffs_Device *dev) -{ - return dev->lostNFoundDir; -} + return n; +} /* - * Erased NAND checking functions + * yaffs_skip_rest_of_block() skips over the rest of the allocation block + * if we don't want to write to it. */ - -int yaffs_CheckFF(__u8 *buffer, int nBytes) -{ - /* Horrible, slow implementation */ - while (nBytes--) { - if (*buffer != 0xFF) - return 0; - buffer++; - } - return 1; -} - -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) -{ - int retval = YAFFS_OK; - __u8 *data = yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ExtendedTags tags; - int result; - - result = yaffs_ReadChunkWithTagsFromNAND(dev, chunkInNAND, data, &tags); - - if (tags.eccResult > YAFFS_ECC_RESULT_NO_ERROR) - retval = YAFFS_FAIL; - - if (!yaffs_CheckFF(data, dev->nDataBytesPerChunk) || tags.chunkUsed) { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not erased" TENDSTR), chunkInNAND)); - retval = YAFFS_FAIL; +void yaffs_skip_rest_of_block(struct yaffs_dev *dev) +{ + if (dev->alloc_block > 0) { + struct yaffs_block_info *bi = + yaffs_get_block_info(dev, dev->alloc_block); + if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING) { + bi->block_state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } } - - yaffs_ReleaseTempBuffer(dev, data, __LINE__); - - return retval; - } - -static int yaffs_VerifyChunkWritten(yaffs_Device *dev, - int chunkInNAND, - const __u8 *data, - yaffs_ExtendedTags *tags) -{ - int retval = YAFFS_OK; - yaffs_ExtendedTags tempTags; - __u8 *buffer = yaffs_GetTempBuffer(dev,__LINE__); - int result; - - result = yaffs_ReadChunkWithTagsFromNAND(dev,chunkInNAND,buffer,&tempTags); - if(memcmp(buffer,data,dev->nDataBytesPerChunk) || - tempTags.objectId != tags->objectId || - tempTags.chunkId != tags->chunkId || - tempTags.byteCount != tags->byteCount) - retval = YAFFS_FAIL; - - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - - return retval; -} - -static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - const __u8 *data, - yaffs_ExtendedTags *tags, - int useReserve) +static int yaffs_write_new_chunk(struct yaffs_dev *dev, + const u8 * data, + struct yaffs_ext_tags *tags, int use_reserver) { int attempts = 0; - int writeOk = 0; + int write_ok = 0; int chunk; - yaffs_InvalidateCheckpoint(dev); + yaffs2_checkpt_invalidate(dev); do { - yaffs_BlockInfo *bi = 0; - int erasedOk = 0; + struct yaffs_block_info *bi = 0; + int erased_ok = 0; - chunk = yaffs_AllocateChunk(dev, useReserve, &bi); + chunk = yaffs_alloc_chunk(dev, use_reserver, &bi); if (chunk < 0) { /* no space */ break; @@ -981,7 +546,7 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, * * Check the first page we try to write in a block. * If the check passes then we don't need to check any - * more. If the check fails, we check again... + * more. If the check fails, we check again... * If the block has been erased, we don't need to check. * * However, if the block has been prioritised for gc, @@ -1002,257 +567,118 @@ static int yaffs_WriteNewChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, /* let's give it a try */ attempts++; -#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED - bi->skipErasedCheck = 0; -#endif - if (!bi->skipErasedCheck) { - erasedOk = yaffs_CheckChunkErased(dev, chunk); - if (erasedOk != YAFFS_OK) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs chunk %d was not erased" - TENDSTR), chunk)); + if (dev->param.always_check_erased) + bi->skip_erased_check = 0; + + if (!bi->skip_erased_check) { + erased_ok = yaffs_check_chunk_erased(dev, chunk); + if (erased_ok != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs chunk %d was not erased", + chunk); /* If not erased, delete this one, * skip rest of block and * try another chunk */ - yaffs_DeleteChunk(dev,chunk,1,__LINE__); - yaffs_SkipRestOfBlock(dev); + yaffs_chunk_del(dev, chunk, 1, __LINE__); + yaffs_skip_rest_of_block(dev); continue; } } - writeOk = yaffs_WriteChunkWithTagsToNAND(dev, chunk, - data, tags); + write_ok = yaffs_wr_chunk_tags_nand(dev, chunk, data, tags); - if(!bi->skipErasedCheck) - writeOk = yaffs_VerifyChunkWritten(dev, chunk, data, tags); + if (!bi->skip_erased_check) + write_ok = + yaffs_verify_chunk_written(dev, chunk, data, tags); - if (writeOk != YAFFS_OK) { + if (write_ok != YAFFS_OK) { /* Clean up aborted write, skip to next block and * try another chunk */ - yaffs_HandleWriteChunkError(dev, chunk, erasedOk); + yaffs_handle_chunk_wr_error(dev, chunk, erased_ok); continue; } - bi->skipErasedCheck = 1; + bi->skip_erased_check = 1; /* Copy the data into the robustification buffer */ - yaffs_HandleWriteChunkOk(dev, chunk, data, tags); + yaffs_handle_chunk_wr_ok(dev, chunk, data, tags); - } while (writeOk != YAFFS_OK && - (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); + } while (write_ok != YAFFS_OK && + (yaffs_wr_attempts <= 0 || attempts <= yaffs_wr_attempts)); - if (!writeOk) + if (!write_ok) chunk = -1; if (attempts > 1) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs write required %d attempts" TENDSTR), - attempts)); - - dev->nRetriedWrites += (attempts - 1); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs write required %d attempts", + attempts); + dev->n_retired_writes += (attempts - 1); } return chunk; } - -/* - * Oldest Dirty Sequence Number handling. - */ - -/* yaffs_CalcOldestDirtySequence() - * yaffs_FindOldestDirtySequence() - * Calculate the oldest dirty sequence number if we don't know it. - */ -static void yaffs_CalcOldestDirtySequence(yaffs_Device *dev) -{ - int i; - unsigned seq; - unsigned blockNo = 0; - yaffs_BlockInfo *b; - - if(!dev->param.isYaffs2) - return; - - /* Find the oldest dirty sequence number. */ - seq = dev->sequenceNumber + 1; - b = dev->blockInfo; - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - if (b->blockState == YAFFS_BLOCK_STATE_FULL && - (b->pagesInUse - b->softDeletions) < dev->param.nChunksPerBlock && - b->sequenceNumber < seq) { - seq = b->sequenceNumber; - blockNo = i; - } - b++; - } - - if(blockNo){ - dev->oldestDirtySequence = seq; - dev->oldestDirtyBlock = blockNo; - } - -} - - -static void yaffs_FindOldestDirtySequence(yaffs_Device *dev) -{ - if(dev->param.isYaffs2 && !dev->oldestDirtySequence) - yaffs_CalcOldestDirtySequence(dev); -} - -/* - * yaffs_ClearOldestDirtySequence() - * Called when a block is erased or marked bad. (ie. when its sequenceNumber - * becomes invalid). If the value matches the oldest then we clear - * dev->oldestDirtySequence to force its recomputation. - */ -static void yaffs_ClearOldestDirtySequence(yaffs_Device *dev, yaffs_BlockInfo *bi) -{ - - if(!dev->param.isYaffs2) - return; - - if(!bi || bi->sequenceNumber == dev->oldestDirtySequence){ - dev->oldestDirtySequence = 0; - dev->oldestDirtyBlock = 0; - } -} - -/* - * yaffs_UpdateOldestDirtySequence() - * Update the oldest dirty sequence number whenever we dirty a block. - * Only do this if the oldestDirtySequence is actually being tracked. - */ -static void yaffs_UpdateOldestDirtySequence(yaffs_Device *dev, unsigned blockNo, yaffs_BlockInfo *bi) -{ - if(dev->param.isYaffs2 && dev->oldestDirtySequence){ - if(dev->oldestDirtySequence > bi->sequenceNumber){ - dev->oldestDirtySequence = bi->sequenceNumber; - dev->oldestDirtyBlock = blockNo; - } - } -} - /* * Block retiring for handling a broken block. */ -static void yaffs_RetireBlock(yaffs_Device *dev, int blockInNAND) +static void yaffs_retire_block(struct yaffs_dev *dev, int flash_block) { - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); + struct yaffs_block_info *bi = yaffs_get_block_info(dev, flash_block); - yaffs_InvalidateCheckpoint(dev); - - yaffs_ClearOldestDirtySequence(dev,bi); + yaffs2_checkpt_invalidate(dev); - if (yaffs_MarkBlockBad(dev, blockInNAND) != YAFFS_OK) { - if (yaffs_EraseBlockInNAND(dev, blockInNAND) != YAFFS_OK) { - T(YAFFS_TRACE_ALWAYS, (TSTR( - "yaffs: Failed to mark bad and erase block %d" - TENDSTR), blockInNAND)); - } else { - yaffs_ExtendedTags tags; - int chunkId = blockInNAND * dev->param.nChunksPerBlock; - - __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); - - memset(buffer, 0xff, dev->nDataBytesPerChunk); - yaffs_InitialiseTags(&tags); - tags.sequenceNumber = YAFFS_SEQUENCE_BAD_BLOCK; - if (dev->param.writeChunkWithTagsToNAND(dev, chunkId - - dev->chunkOffset, buffer, &tags) != YAFFS_OK) - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Failed to " - TCONT("write bad block marker to block %d") - TENDSTR), blockInNAND)); - - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - } - } - - bi->blockState = YAFFS_BLOCK_STATE_DEAD; - bi->gcPrioritise = 0; - bi->needsRetiring = 0; - - dev->nRetiredBlocks++; -} - -/* - * Functions for robustisizing TODO - * - */ - -static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, - const __u8 *data, - const yaffs_ExtendedTags *tags) -{ - dev=dev; - chunkInNAND=chunkInNAND; - data=data; - tags=tags; -} - -static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, - const yaffs_ExtendedTags *tags) -{ - dev=dev; - chunkInNAND=chunkInNAND; - tags=tags; -} - -void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi) -{ - if (!bi->gcPrioritise) { - bi->gcPrioritise = 1; - dev->hasPendingPrioritisedGCs = 1; - bi->chunkErrorStrikes++; - - if (bi->chunkErrorStrikes > 3) { - bi->needsRetiring = 1; /* Too many stikes, so retire this */ - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Block struck out" TENDSTR))); + yaffs2_clear_oldest_dirty_seq(dev, bi); + if (yaffs_mark_bad(dev, flash_block) != YAFFS_OK) { + if (yaffs_erase_block(dev, flash_block) != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to mark bad and erase block %d", + flash_block); + } else { + struct yaffs_ext_tags tags; + int chunk_id = + flash_block * dev->param.chunks_per_block; + + u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); + + memset(buffer, 0xff, dev->data_bytes_per_chunk); + yaffs_init_tags(&tags); + tags.seq_number = YAFFS_SEQUENCE_BAD_BLOCK; + if (dev->param.write_chunk_tags_fn(dev, chunk_id - + dev->chunk_offset, + buffer, + &tags) != YAFFS_OK) + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Failed to write bad block marker to block %d", + flash_block); + + yaffs_release_temp_buffer(dev, buffer, __LINE__); } } -} - -static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND, - int erasedOk) -{ - int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock; - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockInNAND); - yaffs_HandleChunkError(dev, bi); + bi->block_state = YAFFS_BLOCK_STATE_DEAD; + bi->gc_prioritise = 0; + bi->needs_retiring = 0; - if (erasedOk) { - /* Was an actual write failure, so mark the block for retirement */ - bi->needsRetiring = 1; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d needs retiring" TENDSTR), blockInNAND)); - } - - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); - yaffs_SkipRestOfBlock(dev); + dev->n_retired_blocks++; } - /*---------------- Name handling functions ------------*/ -static __u16 yaffs_CalcNameSum(const YCHAR *name) +static u16 yaffs_calc_name_sum(const YCHAR * name) { - __u16 sum = 0; - __u16 i = 1; + u16 sum = 0; + u16 i = 1; - const YUCHAR *bname = (const YUCHAR *) name; + const YUCHAR *bname = (const YUCHAR *)name; if (bname) { - while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH/2))) { + while ((*bname) && (i < (YAFFS_MAX_NAME_LENGTH / 2))) { -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - sum += yaffs_toupper(*bname) * i; -#else - sum += (*bname) * i; -#endif + /* 0x1f mask is case insensitive */ + sum += ((*bname) & 0x1f) * i; i++; bname++; } @@ -1260,16 +686,32 @@ static __u16 yaffs_CalcNameSum(const YCHAR *name) return sum; } -static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name) +void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name) { -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - memset(obj->shortName, 0, sizeof(YCHAR) * (YAFFS_SHORT_NAME_LENGTH+1)); - if (name && yaffs_strnlen(name,YAFFS_SHORT_NAME_LENGTH+1) <= YAFFS_SHORT_NAME_LENGTH) - yaffs_strcpy(obj->shortName, name); +#ifndef CONFIG_YAFFS_NO_SHORT_NAMES + memset(obj->short_name, 0, sizeof(obj->short_name)); + if (name && + strnlen(name, YAFFS_SHORT_NAME_LENGTH + 1) <= + YAFFS_SHORT_NAME_LENGTH) + strcpy(obj->short_name, name); else - obj->shortName[0] = _Y('\0'); + obj->short_name[0] = _Y('\0'); +#endif + obj->sum = yaffs_calc_name_sum(name); +} + +void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, + const struct yaffs_obj_hdr *oh) +{ +#ifdef CONFIG_YAFFS_AUTO_UNICODE + YCHAR tmp_name[YAFFS_MAX_NAME_LENGTH + 1]; + memset(tmp_name, 0, sizeof(tmp_name)); + yaffs_load_name_from_oh(obj->my_dev, tmp_name, oh->name, + YAFFS_MAX_NAME_LENGTH + 1); + yaffs_set_obj_name(obj, tmp_name); +#else + yaffs_set_obj_name(obj, oh->name); #endif - obj->sum = yaffs_CalcNameSum(name); } /*-------------------- TNODES ------------------- @@ -1279,252 +721,90 @@ static void yaffs_SetObjectName(yaffs_Object *obj, const YCHAR *name) * in the tnode. */ -/* yaffs_CreateTnodes creates a bunch more tnodes and - * adds them to the tnode free list. - * Don't use this function directly - */ -static Y_INLINE int yaffs_CalcTnodeSize(yaffs_Device *dev) -{ - int tnodeSize; - /* Calculate the tnode size in bytes for variable width tnode support. - * Must be a multiple of 32-bits */ - tnodeSize = (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8; - - if (tnodeSize < sizeof(yaffs_Tnode)) - tnodeSize = sizeof(yaffs_Tnode); - return tnodeSize; -} - -static int yaffs_CreateTnodes(yaffs_Device *dev, int nTnodes) -{ - int i; - int tnodeSize = yaffs_CalcTnodeSize(dev); - yaffs_Tnode *newTnodes; - __u8 *mem; - yaffs_Tnode *curr; - yaffs_Tnode *next; - yaffs_TnodeList *tnl; - - if (nTnodes < 1) - return YAFFS_OK; - - - /* make these things */ - - newTnodes = YMALLOC(nTnodes * tnodeSize); - mem = (__u8 *)newTnodes; - - if (!newTnodes) { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: Could not allocate Tnodes" TENDSTR))); - return YAFFS_FAIL; - } - - /* Hook them into the free list */ -#if 0 - for (i = 0; i < nTnodes - 1; i++) { - newTnodes[i].internal[0] = &newTnodes[i + 1]; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[i].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - } - - newTnodes[nTnodes - 1].internal[0] = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - newTnodes[nTnodes - 1].internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - dev->freeTnodes = newTnodes; -#else - /* New hookup for wide tnodes */ - for (i = 0; i < nTnodes - 1; i++) { - curr = (yaffs_Tnode *) &mem[i * tnodeSize]; - next = (yaffs_Tnode *) &mem[(i+1) * tnodeSize]; - curr->internal[0] = next; - } - - curr = (yaffs_Tnode *) &mem[(nTnodes - 1) * tnodeSize]; - curr->internal[0] = dev->freeTnodes; - dev->freeTnodes = (yaffs_Tnode *)mem; - -#endif - - - dev->nFreeTnodes += nTnodes; - dev->nTnodesCreated += nTnodes; - - /* Now add this bunch of tnodes to a list for freeing up. - * NB If we can't add this to the management list it isn't fatal - * but it just means we can't free this bunch of tnodes later. - */ - - tnl = YMALLOC(sizeof(yaffs_TnodeList)); - if (!tnl) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs: Could not add tnodes to management list" TENDSTR))); - return YAFFS_FAIL; - } else { - tnl->tnodes = newTnodes; - tnl->next = dev->allocatedTnodeList; - dev->allocatedTnodeList = tnl; - } - - T(YAFFS_TRACE_ALLOCATE, (TSTR("yaffs: Tnodes added" TENDSTR))); - - return YAFFS_OK; -} - -/* GetTnode gets us a clean tnode. Tries to make allocate more if we run out */ - -static yaffs_Tnode *yaffs_GetTnodeRaw(yaffs_Device *dev) +struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev) { - yaffs_Tnode *tn = NULL; - -#ifdef CONFIG_YAFFS_VALGRIND_TEST - tn = YMALLOC(yaffs_CalcTnodeSize(dev)); - if(tn) - dev->nTnodesCreated++; -#else - /* If there are none left make more */ - if (!dev->freeTnodes) - yaffs_CreateTnodes(dev, YAFFS_ALLOCATION_NTNODES); - - if (dev->freeTnodes) { - tn = dev->freeTnodes; -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != (void *)1) { - /* Hoosterman, this thing looks like it isn't in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 1" TENDSTR))); - } -#endif - dev->freeTnodes = dev->freeTnodes->internal[0]; - dev->nFreeTnodes--; + struct yaffs_tnode *tn = yaffs_alloc_raw_tnode(dev); + if (tn) { + memset(tn, 0, dev->tnode_size); + dev->n_tnodes++; } -#endif - dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ - return tn; -} - -static yaffs_Tnode *yaffs_GetTnode(yaffs_Device *dev) -{ - yaffs_Tnode *tn = yaffs_GetTnodeRaw(dev); - int tnodeSize = yaffs_CalcTnodeSize(dev); - - if (tn) - memset(tn, 0, tnodeSize); + dev->checkpoint_blocks_required = 0; /* force recalculation */ return tn; } /* FreeTnode frees up a tnode and puts it back on the free list */ -static void yaffs_FreeTnode(yaffs_Device *dev, yaffs_Tnode *tn) +static void yaffs_free_tnode(struct yaffs_dev *dev, struct yaffs_tnode *tn) { - if (tn) { -#ifdef CONFIG_YAFFS_VALGRIND_TEST - YFREE(tn); - dev->nTnodesCreated--; -#else -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - if (tn->internal[YAFFS_NTNODES_INTERNAL] != 0) { - /* Hoosterman, this thing looks like it is already in the list */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: Tnode list bug 2" TENDSTR))); - } - tn->internal[YAFFS_NTNODES_INTERNAL] = (void *)1; -#endif - tn->internal[0] = dev->freeTnodes; - dev->freeTnodes = tn; - dev->nFreeTnodes++; -#endif - } - dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ + yaffs_free_raw_tnode(dev, tn); + dev->n_tnodes--; + dev->checkpoint_blocks_required = 0; /* force recalculation */ } -static void yaffs_DeinitialiseTnodes(yaffs_Device *dev) +static void yaffs_deinit_tnodes_and_objs(struct yaffs_dev *dev) { - /* Free the list of allocated tnodes */ - yaffs_TnodeList *tmp; - - while (dev->allocatedTnodeList) { - tmp = dev->allocatedTnodeList->next; - - YFREE(dev->allocatedTnodeList->tnodes); - YFREE(dev->allocatedTnodeList); - dev->allocatedTnodeList = tmp; - - } - - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; - dev->nTnodesCreated = 0; + yaffs_deinit_raw_tnodes_and_objs(dev); + dev->n_obj = 0; + dev->n_tnodes = 0; } -static void yaffs_InitialiseTnodes(yaffs_Device *dev) +void yaffs_load_tnode_0(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos, unsigned val) { - dev->allocatedTnodeList = NULL; - dev->freeTnodes = NULL; - dev->nFreeTnodes = 0; - dev->nTnodesCreated = 0; -} - - -void yaffs_LoadLevel0Tnode(yaffs_Device *dev, yaffs_Tnode *tn, unsigned pos, - unsigned val) -{ - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 mask; + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 mask; pos &= YAFFS_TNODES_LEVEL0_MASK; - val >>= dev->chunkGroupBits; + val >>= dev->chunk_grp_bits; - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap / 32; - bitInWord = bitInMap & (32 - 1); + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); - mask = dev->tnodeMask << bitInWord; + mask = dev->tnode_mask << bit_in_word; - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val << bitInWord)); + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val << bit_in_word)); - if (dev->tnodeWidth > (32 - bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - mask = dev->tnodeMask >> (/*dev->tnodeWidth -*/ bitInWord); - map[wordInMap] &= ~mask; - map[wordInMap] |= (mask & (val >> bitInWord)); + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++;; + mask = + dev->tnode_mask >> ( /*dev->tnode_width - */ bit_in_word); + map[word_in_map] &= ~mask; + map[word_in_map] |= (mask & (val >> bit_in_word)); } } -static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, - unsigned pos) +u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos) { - __u32 *map = (__u32 *)tn; - __u32 bitInMap; - __u32 bitInWord; - __u32 wordInMap; - __u32 val; + u32 *map = (u32 *) tn; + u32 bit_in_map; + u32 bit_in_word; + u32 word_in_map; + u32 val; pos &= YAFFS_TNODES_LEVEL0_MASK; - bitInMap = pos * dev->tnodeWidth; - wordInMap = bitInMap / 32; - bitInWord = bitInMap & (32 - 1); + bit_in_map = pos * dev->tnode_width; + word_in_map = bit_in_map / 32; + bit_in_word = bit_in_map & (32 - 1); - val = map[wordInMap] >> bitInWord; + val = map[word_in_map] >> bit_in_word; - if (dev->tnodeWidth > (32 - bitInWord)) { - bitInWord = (32 - bitInWord); - wordInMap++;; - val |= (map[wordInMap] << bitInWord); + if (dev->tnode_width > (32 - bit_in_word)) { + bit_in_word = (32 - bit_in_word); + word_in_map++;; + val |= (map[word_in_map] << bit_in_word); } - val &= dev->tnodeMask; - val <<= dev->chunkGroupBits; + val &= dev->tnode_mask; + val <<= dev->chunk_grp_bits; return val; } @@ -1532,48 +812,48 @@ static __u32 yaffs_GetChunkGroupBase(yaffs_Device *dev, yaffs_Tnode *tn, /* ------------------- End of individual tnode manipulation -----------------*/ /* ---------Functions to manipulate the look-up tree (made up of tnodes) ------ - * The look up tree is represented by the top tnode and the number of topLevel + * The look up tree is represented by the top tnode and the number of top_level * in the tree. 0 means only the level 0 tnode is in the tree. */ /* FindLevel0Tnode finds the level 0 tnode, if one exists. */ -static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev, - yaffs_FileStructure *fStruct, - __u32 chunkId) +struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id) { - yaffs_Tnode *tn = fStruct->top; - __u32 i; - int requiredTallness; - int level = fStruct->topLevel; + struct yaffs_tnode *tn = file_struct->top; + u32 i; + int required_depth; + int level = file_struct->top_level; - dev=dev; + dev = dev; /* Check sane level and chunk Id */ if (level < 0 || level > YAFFS_TNODES_MAX_LEVEL) return NULL; - if (chunkId > YAFFS_MAX_CHUNK_ID) + if (chunk_id > YAFFS_MAX_CHUNK_ID) return NULL; - /* First check we're tall enough (ie enough topLevel) */ + /* First check we're tall enough (ie enough top_level) */ - i = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + i = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; while (i) { i >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } - if (requiredTallness > fStruct->topLevel) - return NULL; /* Not tall enough, so we can't find it */ + if (required_depth > file_struct->top_level) + return NULL; /* Not tall enough, so we can't find it */ /* Traverse down to level 0 */ while (level > 0 && tn) { - tn = tn->internal[(chunkId >> - (YAFFS_TNODES_LEVEL0_BITS + - (level - 1) * - YAFFS_TNODES_INTERNAL_BITS)) & - YAFFS_TNODES_INTERNAL_MASK]; + tn = tn->internal[(chunk_id >> + (YAFFS_TNODES_LEVEL0_BITS + + (level - 1) * + YAFFS_TNODES_INTERNAL_BITS)) & + YAFFS_TNODES_INTERNAL_MASK]; level--; } @@ -1591,49 +871,47 @@ static yaffs_Tnode *yaffs_FindLevel0Tnode(yaffs_Device *dev, * be plugged into the ttree. */ -static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, - yaffs_FileStructure *fStruct, - __u32 chunkId, - yaffs_Tnode *passedTn) +struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id, + struct yaffs_tnode *passed_tn) { - int requiredTallness; + int required_depth; int i; int l; - yaffs_Tnode *tn; - - __u32 x; + struct yaffs_tnode *tn; + u32 x; /* Check sane level and page Id */ - if (fStruct->topLevel < 0 || fStruct->topLevel > YAFFS_TNODES_MAX_LEVEL) + if (file_struct->top_level < 0 + || file_struct->top_level > YAFFS_TNODES_MAX_LEVEL) return NULL; - if (chunkId > YAFFS_MAX_CHUNK_ID) + if (chunk_id > YAFFS_MAX_CHUNK_ID) return NULL; - /* First check we're tall enough (ie enough topLevel) */ + /* First check we're tall enough (ie enough top_level) */ - x = chunkId >> YAFFS_TNODES_LEVEL0_BITS; - requiredTallness = 0; + x = chunk_id >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; while (x) { x >>= YAFFS_TNODES_INTERNAL_BITS; - requiredTallness++; + required_depth++; } - - if (requiredTallness > fStruct->topLevel) { + if (required_depth > file_struct->top_level) { /* Not tall enough, gotta make the tree taller */ - for (i = fStruct->topLevel; i < requiredTallness; i++) { + for (i = file_struct->top_level; i < required_depth; i++) { - tn = yaffs_GetTnode(dev); + tn = yaffs_get_tnode(dev); if (tn) { - tn->internal[0] = fStruct->top; - fStruct->top = tn; - fStruct->topLevel++; + tn->internal[0] = file_struct->top; + file_struct->top = tn; + file_struct->top_level++; } else { - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs: no more tnodes" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ERROR, "yaffs: no more tnodes"); return NULL; } } @@ -1641,34 +919,35 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, /* Traverse down to level 0, adding anything we need */ - l = fStruct->topLevel; - tn = fStruct->top; + l = file_struct->top_level; + tn = file_struct->top; if (l > 0) { while (l > 0 && tn) { - x = (chunkId >> + x = (chunk_id >> (YAFFS_TNODES_LEVEL0_BITS + (l - 1) * YAFFS_TNODES_INTERNAL_BITS)) & YAFFS_TNODES_INTERNAL_MASK; - if ((l > 1) && !tn->internal[x]) { /* Add missing non-level-zero tnode */ - tn->internal[x] = yaffs_GetTnode(dev); - if(!tn->internal[x]) + tn->internal[x] = yaffs_get_tnode(dev); + if (!tn->internal[x]) return NULL; } else if (l == 1) { /* Looking from level 1 at level 0 */ - if (passedTn) { - /* If we already have one, then release it.*/ + if (passed_tn) { + /* If we already have one, then release it. */ if (tn->internal[x]) - yaffs_FreeTnode(dev, tn->internal[x]); - tn->internal[x] = passedTn; + yaffs_free_tnode(dev, + tn-> + internal[x]); + tn->internal[x] = passed_tn; } else if (!tn->internal[x]) { /* Don't have one, none passed in */ - tn->internal[x] = yaffs_GetTnode(dev); - if(!tn->internal[x]) + tn->internal[x] = yaffs_get_tnode(dev); + if (!tn->internal[x]) return NULL; } } @@ -1678,151 +957,250 @@ static yaffs_Tnode *yaffs_AddOrFindLevel0Tnode(yaffs_Device *dev, } } else { /* top is level 0 */ - if (passedTn) { - memcpy(tn, passedTn, (dev->tnodeWidth * YAFFS_NTNODES_LEVEL0)/8); - yaffs_FreeTnode(dev, passedTn); + if (passed_tn) { + memcpy(tn, passed_tn, + (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8); + yaffs_free_tnode(dev, passed_tn); } } return tn; } -static int yaffs_FindChunkInGroup(yaffs_Device *dev, int theChunk, - yaffs_ExtendedTags *tags, int objectId, - int chunkInInode) +static int yaffs_tags_match(const struct yaffs_ext_tags *tags, int obj_id, + int chunk_obj) +{ + return (tags->chunk_id == chunk_obj && + tags->obj_id == obj_id && !tags->is_deleted) ? 1 : 0; + +} + +static int yaffs_find_chunk_in_group(struct yaffs_dev *dev, int the_chunk, + struct yaffs_ext_tags *tags, int obj_id, + int inode_chunk) { int j; - for (j = 0; theChunk && j < dev->chunkGroupSize; j++) { - if (yaffs_CheckChunkBit(dev, theChunk / dev->param.nChunksPerBlock, - theChunk % dev->param.nChunksPerBlock)) { - - if(dev->chunkGroupSize == 1) - return theChunk; + for (j = 0; the_chunk && j < dev->chunk_grp_size; j++) { + if (yaffs_check_chunk_bit + (dev, the_chunk / dev->param.chunks_per_block, + the_chunk % dev->param.chunks_per_block)) { + + if (dev->chunk_grp_size == 1) + return the_chunk; else { - yaffs_ReadChunkWithTagsFromNAND(dev, theChunk, NULL, - tags); - if (yaffs_TagsMatch(tags, objectId, chunkInInode)) { + yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, + tags); + if (yaffs_tags_match(tags, obj_id, inode_chunk)) { /* found it; */ - return theChunk; + return the_chunk; } } } - theChunk++; + the_chunk++; } return -1; } -#if 0 -/* Experimental code not being used yet. Might speed up file deletion */ -/* DeleteWorker scans backwards through the tnode tree and deletes all the - * chunks and tnodes in the file. - * Returns 1 if the tree was deleted. - * Returns 0 if it stopped early due to hitting the limit and the delete is incomplete. - */ +static int yaffs_find_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + struct yaffs_ext_tags *tags) +{ + /*Get the Tnode, then get the level 0 offset chunk offset */ + struct yaffs_tnode *tn; + int the_chunk = -1; + struct yaffs_ext_tags local_tags; + int ret_val = -1; + + struct yaffs_dev *dev = in->my_dev; + + if (!tags) { + /* Passed a NULL, so use our own tags space */ + tags = &local_tags; + } + + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); + + if (tn) { + the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); -static int yaffs_DeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, __u32 level, - int chunkOffset, int *limit) + ret_val = + yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, + inode_chunk); + } + return ret_val; +} + +static int yaffs_find_del_file_chunk(struct yaffs_obj *in, int inode_chunk, + struct yaffs_ext_tags *tags) { - int i; - int chunkInInode; - int theChunk; - yaffs_ExtendedTags tags; - int foundChunk; - yaffs_Device *dev = in->myDev; + /* Get the Tnode, then get the level 0 offset chunk offset */ + struct yaffs_tnode *tn; + int the_chunk = -1; + struct yaffs_ext_tags local_tags; - int allDone = 1; + struct yaffs_dev *dev = in->my_dev; + int ret_val = -1; + + if (!tags) { + /* Passed a NULL, so use our own tags space */ + tags = &local_tags; + } + + tn = yaffs_find_tnode_0(dev, &in->variant.file_variant, inode_chunk); if (tn) { - if (level > 0) { - for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; - i--) { - if (tn->internal[i]) { - if (limit && (*limit) < 0) { - allDone = 0; - } else { - allDone = - yaffs_DeleteWorker(in, - tn-> - internal - [i], - level - - 1, - (chunkOffset - << - YAFFS_TNODES_INTERNAL_BITS) - + i, - limit); - } - if (allDone) { - yaffs_FreeTnode(dev, - tn-> - internal[i]); - tn->internal[i] = NULL; - } - } + + the_chunk = yaffs_get_group_base(dev, tn, inode_chunk); + + ret_val = + yaffs_find_chunk_in_group(dev, the_chunk, tags, in->obj_id, + inode_chunk); + + /* Delete the entry in the filestructure (if found) */ + if (ret_val != -1) + yaffs_load_tnode_0(dev, tn, inode_chunk, 0); + } + + return ret_val; +} + +int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + int nand_chunk, int in_scan) +{ + /* NB in_scan is zero unless scanning. + * For forward scanning, in_scan is > 0; + * for backward scanning in_scan is < 0 + * + * nand_chunk = 0 is a dummy insert to make sure the tnodes are there. + */ + + struct yaffs_tnode *tn; + struct yaffs_dev *dev = in->my_dev; + int existing_cunk; + struct yaffs_ext_tags existing_tags; + struct yaffs_ext_tags new_tags; + unsigned existing_serial, new_serial; + + if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) { + /* Just ignore an attempt at putting a chunk into a non-file during scanning + * If it is not during Scanning then something went wrong! + */ + if (!in_scan) { + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy:attempt to put data chunk into a non-file" + ); + YBUG(); + } + + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + return YAFFS_OK; + } + + tn = yaffs_add_find_tnode_0(dev, + &in->variant.file_variant, + inode_chunk, NULL); + if (!tn) + return YAFFS_FAIL; + + if (!nand_chunk) + /* Dummy insert, bail now */ + return YAFFS_OK; + + existing_cunk = yaffs_get_group_base(dev, tn, inode_chunk); + + if (in_scan != 0) { + /* If we're scanning then we need to test for duplicates + * NB This does not need to be efficient since it should only ever + * happen when the power fails during a write, then only one + * chunk should ever be affected. + * + * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO + * Update: For backward scanning we don't need to re-read tags so this is quite cheap. + */ + + if (existing_cunk > 0) { + /* NB Right now existing chunk will not be real chunk_id if the chunk group size > 1 + * thus we have to do a FindChunkInFile to get the real chunk id. + * + * We have a duplicate now we need to decide which one to use: + * + * Backwards scanning YAFFS2: The old one is what we use, dump the new one. + * Forward scanning YAFFS2: The new one is what we use, dump the old one. + * YAFFS1: Get both sets of tags and compare serial numbers. + */ + + if (in_scan > 0) { + /* Only do this for forward scanning */ + yaffs_rd_chunk_tags_nand(dev, + nand_chunk, + NULL, &new_tags); + + /* Do a proper find */ + existing_cunk = + yaffs_find_chunk_in_file(in, inode_chunk, + &existing_tags); } - return (allDone) ? 1 : 0; - } else if (level == 0) { - int hitLimit = 0; - - for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0 && !hitLimit; - i--) { - theChunk = yaffs_GetChunkGroupBase(dev, tn, i); - if (theChunk) { - - chunkInInode = (chunkOffset << - YAFFS_TNODES_LEVEL0_BITS) + i; - - foundChunk = - yaffs_FindChunkInGroup(dev, - theChunk, - &tags, - in->objectId, - chunkInInode); - - if (foundChunk > 0) { - yaffs_DeleteChunk(dev, - foundChunk, 1, - __LINE__); - in->nDataChunks--; - if (limit) { - *limit = *limit - 1; - if (*limit <= 0) - hitLimit = 1; - } - } + if (existing_cunk <= 0) { + /*Hoosterman - how did this happen? */ - yaffs_LoadLevel0Tnode(dev, tn, i, 0); - } + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: existing chunk < 0 in scan" + ); + + } + /* NB The deleted flags should be false, otherwise the chunks will + * not be loaded during a scan + */ + + if (in_scan > 0) { + new_serial = new_tags.serial_number; + existing_serial = existing_tags.serial_number; } - return (i < 0) ? 1 : 0; + if ((in_scan > 0) && + (existing_cunk <= 0 || + ((existing_serial + 1) & 3) == new_serial)) { + /* Forward scanning. + * Use new + * Delete the old one and drop through to update the tnode + */ + yaffs_chunk_del(dev, existing_cunk, 1, + __LINE__); + } else { + /* Backward scanning or we want to use the existing one + * Use existing. + * Delete the new one and return early so that the tnode isn't changed + */ + yaffs_chunk_del(dev, nand_chunk, 1, __LINE__); + return YAFFS_OK; + } } } - return 1; + if (existing_cunk == 0) + in->n_data_chunks++; -} + yaffs_load_tnode_0(dev, tn, inode_chunk, nand_chunk); -#endif + return YAFFS_OK; +} -static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk) +static void yaffs_soft_del_chunk(struct yaffs_dev *dev, int chunk) { - yaffs_BlockInfo *theBlock; - unsigned blockNo; + struct yaffs_block_info *the_block; + unsigned block_no; - T(YAFFS_TRACE_DELETION, (TSTR("soft delete chunk %d" TENDSTR), chunk)); + yaffs_trace(YAFFS_TRACE_DELETION, "soft delete chunk %d", chunk); - blockNo = chunk / dev->param.nChunksPerBlock; - theBlock = yaffs_GetBlockInfo(dev, blockNo); - if (theBlock) { - theBlock->softDeletions++; - dev->nFreeChunks++; - yaffs_UpdateOldestDirtySequence(dev, blockNo, theBlock); + block_no = chunk / dev->param.chunks_per_block; + the_block = yaffs_get_block_info(dev, block_no); + if (the_block) { + the_block->soft_del_pages++; + dev->n_free_chunks++; + yaffs2_update_oldest_dirty_seq(dev, block_no, the_block); } } @@ -1832,51 +1210,51 @@ static void yaffs_SoftDeleteChunk(yaffs_Device *dev, int chunk) * Thus, essentially this is the same as DeleteWorker except that the chunks are soft deleted. */ -static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, - __u32 level, int chunkOffset) +static int yaffs_soft_del_worker(struct yaffs_obj *in, struct yaffs_tnode *tn, + u32 level, int chunk_offset) { int i; - int theChunk; - int allDone = 1; - yaffs_Device *dev = in->myDev; + int the_chunk; + int all_done = 1; + struct yaffs_dev *dev = in->my_dev; if (tn) { if (level > 0) { - for (i = YAFFS_NTNODES_INTERNAL - 1; allDone && i >= 0; + for (i = YAFFS_NTNODES_INTERNAL - 1; all_done && i >= 0; i--) { if (tn->internal[i]) { - allDone = - yaffs_SoftDeleteWorker(in, - tn-> - internal[i], - level - 1, - (chunkOffset - << - YAFFS_TNODES_INTERNAL_BITS) - + i); - if (allDone) { - yaffs_FreeTnode(dev, - tn-> - internal[i]); + all_done = + yaffs_soft_del_worker(in, + tn->internal + [i], + level - 1, + (chunk_offset + << + YAFFS_TNODES_INTERNAL_BITS) + + i); + if (all_done) { + yaffs_free_tnode(dev, + tn->internal + [i]); tn->internal[i] = NULL; } else { /* Hoosterman... how could this happen? */ } } } - return (allDone) ? 1 : 0; + return (all_done) ? 1 : 0; } else if (level == 0) { for (i = YAFFS_NTNODES_LEVEL0 - 1; i >= 0; i--) { - theChunk = yaffs_GetChunkGroupBase(dev, tn, i); - if (theChunk) { + the_chunk = yaffs_get_group_base(dev, tn, i); + if (the_chunk) { /* Note this does not find the real chunk, only the chunk group. * We make an assumption that a chunk group is not larger than * a block. */ - yaffs_SoftDeleteChunk(dev, theChunk); - yaffs_LoadLevel0Tnode(dev, tn, i, 0); + yaffs_soft_del_chunk(dev, the_chunk); + yaffs_load_tnode_0(dev, tn, i, 0); } } @@ -1890,368 +1268,634 @@ static int yaffs_SoftDeleteWorker(yaffs_Object *in, yaffs_Tnode *tn, } -static void yaffs_SoftDeleteFile(yaffs_Object *obj) +static void yaffs_remove_obj_from_dir(struct yaffs_obj *obj) { - if (obj->deleted && - obj->variantType == YAFFS_OBJECT_TYPE_FILE && !obj->softDeleted) { - if (obj->nDataChunks <= 0) { - /* Empty file with no duplicate object headers, just delete it immediately */ - yaffs_FreeTnode(obj->myDev, - obj->variant.fileVariant.top); - obj->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: Deleting empty file %d" TENDSTR), - obj->objectId)); - yaffs_DoGenericObjectDeletion(obj); - } else { - yaffs_SoftDeleteWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant. - topLevel, 0); - obj->softDeleted = 1; - } - } -} + struct yaffs_dev *dev = obj->my_dev; + struct yaffs_obj *parent; -/* Pruning removes any part of the file structure tree that is beyond the - * bounds of the file (ie that does not point to chunks). - * - * A file should only get pruned when its size is reduced. - * - * Before pruning, the chunks must be pulled from the tree and the - * level 0 tnode entries must be zeroed out. - * Could also use this for file deletion, but that's probably better handled - * by a special case. - * - * This function is recursive. For levels > 0 the function is called again on - * any sub-tree. For level == 0 we just check if the sub-tree has data. - * If there is no data in a subtree then it is pruned. - */ + yaffs_verify_obj_in_dir(obj); + parent = obj->parent; + + yaffs_verify_dir(parent); + + if (dev && dev->param.remove_obj_fn) + dev->param.remove_obj_fn(obj); + + list_del_init(&obj->siblings); + obj->parent = NULL; + + yaffs_verify_dir(parent); +} -static yaffs_Tnode *yaffs_PruneWorker(yaffs_Device *dev, yaffs_Tnode *tn, - __u32 level, int del0) +void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj) { - int i; - int hasData; + if (!directory) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a null pointer directory" + ); + YBUG(); + return; + } + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: Trying to add an object to a non-directory" + ); + YBUG(); + } - if (tn) { - hasData = 0; + if (obj->siblings.prev == NULL) { + /* Not initialised */ + YBUG(); + } - if(level > 0){ - for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) { - tn->internal[i] = - yaffs_PruneWorker(dev, tn->internal[i], - level - 1, - (i == 0) ? del0 : 1); - } + yaffs_verify_dir(directory); - if (tn->internal[i]) - hasData++; - } - } else { - int tnodeSize_u32 = yaffs_CalcTnodeSize(dev)/sizeof(__u32); - __u32 *map = (__u32 *)tn; + yaffs_remove_obj_from_dir(obj); - for(i = 0; !hasData && i < tnodeSize_u32; i++){ - if(map[i]) - hasData++; - } - } + /* Now add it */ + list_add(&obj->siblings, &directory->variant.dir_variant.children); + obj->parent = directory; - if (hasData == 0 && del0) { - /* Free and return NULL */ + if (directory == obj->my_dev->unlinked_dir + || directory == obj->my_dev->del_dir) { + obj->unlinked = 1; + obj->my_dev->n_unlinked_files++; + obj->rename_allowed = 0; + } - yaffs_FreeTnode(dev, tn); - tn = NULL; - } + yaffs_verify_dir(directory); + yaffs_verify_obj_in_dir(obj); +} +static int yaffs_change_obj_name(struct yaffs_obj *obj, + struct yaffs_obj *new_dir, + const YCHAR * new_name, int force, int shadows) +{ + int unlink_op; + int del_op; + + struct yaffs_obj *existing_target; + + if (new_dir == NULL) + new_dir = obj->parent; /* use the old directory */ + + if (new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_change_obj_name: new_dir is not a directory" + ); + YBUG(); } - return tn; + /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ + if (obj->my_dev->param.is_yaffs2) + unlink_op = (new_dir == obj->my_dev->unlinked_dir); + else + unlink_op = (new_dir == obj->my_dev->unlinked_dir + && obj->variant_type == YAFFS_OBJECT_TYPE_FILE); + + del_op = (new_dir == obj->my_dev->del_dir); + existing_target = yaffs_find_by_name(new_dir, new_name); + + /* If the object is a file going into the unlinked directory, + * then it is OK to just stuff it in since duplicate names are allowed. + * else only proceed if the new name does not exist and if we're putting + * it into a directory. + */ + if ((unlink_op || + del_op || + force || + (shadows > 0) || + !existing_target) && + new_dir->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_set_obj_name(obj, new_name); + obj->dirty = 1; + + yaffs_add_obj_to_dir(new_dir, obj); + + if (unlink_op) + obj->unlinked = 1; + + /* If it is a deletion then we mark it as a shrink for gc purposes. */ + if (yaffs_update_oh(obj, new_name, 0, del_op, shadows, NULL) >= + 0) + return YAFFS_OK; + } + + return YAFFS_FAIL; } -static int yaffs_PruneFileStructure(yaffs_Device *dev, - yaffs_FileStructure *fStruct) +/*------------------------ Short Operations Cache ---------------------------------------- + * In many situations where there is no high level buffering a lot of + * reads might be short sequential reads, and a lot of writes may be short + * sequential writes. eg. scanning/writing a jpeg file. + * In these cases, a short read/write cache can provide a huge perfomance + * benefit with dumb-as-a-rock code. + * In Linux, the page cache provides read buffering and the short op cache + * provides write buffering. + * + * There are a limited number (~10) of cache chunks per device so that we don't + * need a very intelligent search. + */ + +static int yaffs_obj_cache_dirty(struct yaffs_obj *obj) { + struct yaffs_dev *dev = obj->my_dev; int i; - int hasData; - int done = 0; - yaffs_Tnode *tn; + struct yaffs_cache *cache; + int n_caches = obj->my_dev->param.n_caches; - if (fStruct->topLevel > 0) { - fStruct->top = - yaffs_PruneWorker(dev, fStruct->top, fStruct->topLevel, 0); + for (i = 0; i < n_caches; i++) { + cache = &dev->cache[i]; + if (cache->object == obj && cache->dirty) + return 1; + } - /* Now we have a tree with all the non-zero branches NULL but the height - * is the same as it was. - * Let's see if we can trim internal tnodes to shorten the tree. - * We can do this if only the 0th element in the tnode is in use - * (ie all the non-zero are NULL) - */ + return 0; +} - while (fStruct->topLevel && !done) { - tn = fStruct->top; +static void yaffs_flush_file_cache(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev = obj->my_dev; + int lowest = -99; /* Stop compiler whining. */ + int i; + struct yaffs_cache *cache; + int chunk_written = 0; + int n_caches = obj->my_dev->param.n_caches; - hasData = 0; - for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { - if (tn->internal[i]) - hasData++; + if (n_caches > 0) { + do { + cache = NULL; + + /* Find the dirty cache for this object with the lowest chunk id. */ + for (i = 0; i < n_caches; i++) { + if (dev->cache[i].object == obj && + dev->cache[i].dirty) { + if (!cache + || dev->cache[i].chunk_id < + lowest) { + cache = &dev->cache[i]; + lowest = cache->chunk_id; + } + } } - if (!hasData) { - fStruct->top = tn->internal[0]; - fStruct->topLevel--; - yaffs_FreeTnode(dev, tn); - } else { - done = 1; + if (cache && !cache->locked) { + /* Write it out and free it up */ + + chunk_written = + yaffs_wr_data_obj(cache->object, + cache->chunk_id, + cache->data, + cache->n_bytes, 1); + cache->dirty = 0; + cache->object = NULL; } - } + + } while (cache && chunk_written > 0); + + if (cache) + /* Hoosterman, disk full while writing cache out. */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: no space during cache write"); + } - return YAFFS_OK; } -/*-------------------- End of File Structure functions.-------------------*/ - -/* yaffs_CreateFreeObjects creates a bunch more objects and - * adds them to the object free list. +/*yaffs_flush_whole_cache(dev) + * + * */ -static int yaffs_CreateFreeObjects(yaffs_Device *dev, int nObjects) + +void yaffs_flush_whole_cache(struct yaffs_dev *dev) { + struct yaffs_obj *obj; + int n_caches = dev->param.n_caches; int i; - yaffs_Object *newObjects; - yaffs_ObjectList *list; - - if (nObjects < 1) - return YAFFS_OK; - /* make these things */ - newObjects = YMALLOC(nObjects * sizeof(yaffs_Object)); - list = YMALLOC(sizeof(yaffs_ObjectList)); + /* Find a dirty object in the cache and flush it... + * until there are no further dirty objects. + */ + do { + obj = NULL; + for (i = 0; i < n_caches && !obj; i++) { + if (dev->cache[i].object && dev->cache[i].dirty) + obj = dev->cache[i].object; - if (!newObjects || !list) { - if (newObjects){ - YFREE(newObjects); - newObjects = NULL; - } - if (list){ - YFREE(list); - list = NULL; } - T(YAFFS_TRACE_ALLOCATE, - (TSTR("yaffs: Could not allocate more objects" TENDSTR))); - return YAFFS_FAIL; - } + if (obj) + yaffs_flush_file_cache(obj); - /* Hook them into the free list */ - for (i = 0; i < nObjects - 1; i++) { - newObjects[i].siblings.next = - (struct ylist_head *)(&newObjects[i + 1]); - } + } while (obj); - newObjects[nObjects - 1].siblings.next = (void *)dev->freeObjects; - dev->freeObjects = newObjects; - dev->nFreeObjects += nObjects; - dev->nObjectsCreated += nObjects; +} - /* Now add this bunch of Objects to a list for freeing up. */ +/* Grab us a cache chunk for use. + * First look for an empty one. + * Then look for the least recently used non-dirty one. + * Then look for the least recently used dirty one...., flush and look again. + */ +static struct yaffs_cache *yaffs_grab_chunk_worker(struct yaffs_dev *dev) +{ + int i; - list->objects = newObjects; - list->next = dev->allocatedObjectList; - dev->allocatedObjectList = list; + if (dev->param.n_caches > 0) { + for (i = 0; i < dev->param.n_caches; i++) { + if (!dev->cache[i].object) + return &dev->cache[i]; + } + } - return YAFFS_OK; + return NULL; } - -/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ -static yaffs_Object *yaffs_AllocateEmptyObject(yaffs_Device *dev) +static struct yaffs_cache *yaffs_grab_chunk_cache(struct yaffs_dev *dev) { - yaffs_Object *tn = NULL; + struct yaffs_cache *cache; + struct yaffs_obj *the_obj; + int usage; + int i; + int pushout; -#ifdef CONFIG_YAFFS_VALGRIND_TEST - tn = YMALLOC(sizeof(yaffs_Object)); - if(tn) - dev->nObjectsCreated++; -#else - /* If there are none left make more */ - if (!dev->freeObjects) - yaffs_CreateFreeObjects(dev, YAFFS_ALLOCATION_NOBJECTS); + if (dev->param.n_caches > 0) { + /* Try find a non-dirty one... */ - if (dev->freeObjects) { - tn = dev->freeObjects; - dev->freeObjects = - (yaffs_Object *) (dev->freeObjects->siblings.next); - dev->nFreeObjects--; - } -#endif - if (tn) { - /* Now sweeten it up... */ + cache = yaffs_grab_chunk_worker(dev); - memset(tn, 0, sizeof(yaffs_Object)); - tn->beingCreated = 1; + if (!cache) { + /* They were all dirty, find the last recently used object and flush + * its cache, then find again. + * NB what's here is not very accurate, we actually flush the object + * the last recently used page. + */ - tn->myDev = dev; - tn->hdrChunk = 0; - tn->variantType = YAFFS_OBJECT_TYPE_UNKNOWN; - YINIT_LIST_HEAD(&(tn->hardLinks)); - YINIT_LIST_HEAD(&(tn->hashLink)); - YINIT_LIST_HEAD(&tn->siblings); + /* With locking we can't assume we can use entry zero */ + the_obj = NULL; + usage = -1; + cache = NULL; + pushout = -1; + + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object && + !dev->cache[i].locked && + (dev->cache[i].last_use < usage + || !cache)) { + usage = dev->cache[i].last_use; + the_obj = dev->cache[i].object; + cache = &dev->cache[i]; + pushout = i; + } + } + + if (!cache || cache->dirty) { + /* Flush and try again */ + yaffs_flush_file_cache(the_obj); + cache = yaffs_grab_chunk_worker(dev); + } - /* Now make the directory sane */ - if (dev->rootDir) { - tn->parent = dev->rootDir; - ylist_add(&(tn->siblings), &dev->rootDir->variant.directoryVariant.children); } + return cache; + } else { + return NULL; + } +} - /* Add it to the lost and found directory. - * NB Can't put root or lostNFound in lostNFound so - * check if lostNFound exists first - */ - if (dev->lostNFoundDir) - yaffs_AddObjectToDirectory(dev->lostNFoundDir, tn); +/* Find a cached chunk */ +static struct yaffs_cache *yaffs_find_chunk_cache(const struct yaffs_obj *obj, + int chunk_id) +{ + struct yaffs_dev *dev = obj->my_dev; + int i; + if (dev->param.n_caches > 0) { + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object == obj && + dev->cache[i].chunk_id == chunk_id) { + dev->cache_hits++; - tn->beingCreated = 0; + return &dev->cache[i]; + } + } } + return NULL; +} - dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ +/* Mark the chunk for the least recently used algorithym */ +static void yaffs_use_cache(struct yaffs_dev *dev, struct yaffs_cache *cache, + int is_write) +{ - return tn; + if (dev->param.n_caches > 0) { + if (dev->cache_last_use < 0 || dev->cache_last_use > 100000000) { + /* Reset the cache usages */ + int i; + for (i = 1; i < dev->param.n_caches; i++) + dev->cache[i].last_use = 0; + + dev->cache_last_use = 0; + } + + dev->cache_last_use++; + + cache->last_use = dev->cache_last_use; + + if (is_write) + cache->dirty = 1; + } } -static yaffs_Object *yaffs_CreateFakeDirectory(yaffs_Device *dev, int number, - __u32 mode) +/* Invalidate a single cache page. + * Do this when a whole page gets written, + * ie the short cache for this page is no longer valid. + */ +static void yaffs_invalidate_chunk_cache(struct yaffs_obj *object, int chunk_id) { + if (object->my_dev->param.n_caches > 0) { + struct yaffs_cache *cache = + yaffs_find_chunk_cache(object, chunk_id); - yaffs_Object *obj = - yaffs_CreateNewObject(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); - if (obj) { - obj->fake = 1; /* it is fake so it might have no NAND presence... */ - obj->renameAllowed = 0; /* ... and we're not allowed to rename it... */ - obj->unlinkAllowed = 0; /* ... or unlink it */ - obj->deleted = 0; - obj->unlinked = 0; - obj->yst_mode = mode; - obj->myDev = dev; - obj->hdrChunk = 0; /* Not a valid chunk. */ + if (cache) + cache->object = NULL; } +} - return obj; +/* Invalidate all the cache pages associated with this object + * Do this whenever ther file is deleted or resized. + */ +static void yaffs_invalidate_whole_cache(struct yaffs_obj *in) +{ + int i; + struct yaffs_dev *dev = in->my_dev; + if (dev->param.n_caches > 0) { + /* Invalidate it. */ + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].object == in) + dev->cache[i].object = NULL; + } + } } -static void yaffs_UnhashObject(yaffs_Object *tn) +static void yaffs_unhash_obj(struct yaffs_obj *obj) { int bucket; - yaffs_Device *dev = tn->myDev; + struct yaffs_dev *dev = obj->my_dev; /* If it is still linked into the bucket list, free from the list */ - if (!ylist_empty(&tn->hashLink)) { - ylist_del_init(&tn->hashLink); - bucket = yaffs_HashFunction(tn->objectId); - dev->objectBucket[bucket].count--; + if (!list_empty(&obj->hash_link)) { + list_del_init(&obj->hash_link); + bucket = yaffs_hash_fn(obj->obj_id); + dev->obj_bucket[bucket].count--; } } /* FreeObject frees up a Object and puts it back on the free list */ -static void yaffs_FreeObject(yaffs_Object *tn) +static void yaffs_free_obj(struct yaffs_obj *obj) { - yaffs_Device *dev = tn->myDev; + struct yaffs_dev *dev = obj->my_dev; - T(YAFFS_TRACE_OS, (TSTR("FreeObject %p inode %p"TENDSTR), tn, tn->myInode)); + yaffs_trace(YAFFS_TRACE_OS, "FreeObject %p inode %p", + obj, obj->my_inode); - if (!tn) + if (!obj) YBUG(); - if (tn->parent) + if (obj->parent) YBUG(); - if (!ylist_empty(&tn->siblings)) + if (!list_empty(&obj->siblings)) YBUG(); - - if (tn->myInode) { + if (obj->my_inode) { /* We're still hooked up to a cached inode. * Don't delete now, but mark for later deletion */ - tn->deferedFree = 1; + obj->defered_free = 1; return; } - yaffs_UnhashObject(tn); + yaffs_unhash_obj(obj); -#ifdef CONFIG_YAFFS_VALGRIND_TEST - YFREE(tn); - dev->nObjectsCreated--; - tn = NULL; -#else - /* Link into the free list. */ - tn->siblings.next = (struct ylist_head *)(dev->freeObjects); - dev->freeObjects = tn; - dev->nFreeObjects++; -#endif - dev->nCheckpointBlocksRequired = 0; /* force recalculation*/ + yaffs_free_raw_obj(dev, obj); + dev->n_obj--; + dev->checkpoint_blocks_required = 0; /* force recalculation */ } +void yaffs_handle_defered_free(struct yaffs_obj *obj) +{ + if (obj->defered_free) + yaffs_free_obj(obj); +} -void yaffs_HandleDeferedFree(yaffs_Object *obj) +static int yaffs_generic_obj_del(struct yaffs_obj *in) { - if (obj->deferedFree) - yaffs_FreeObject(obj); + + /* First off, invalidate the file's data in the cache, without flushing. */ + yaffs_invalidate_whole_cache(in); + + if (in->my_dev->param.is_yaffs2 && (in->parent != in->my_dev->del_dir)) { + /* Move to the unlinked directory so we have a record that it was deleted. */ + yaffs_change_obj_name(in, in->my_dev->del_dir, _Y("deleted"), 0, + 0); + + } + + yaffs_remove_obj_from_dir(in); + yaffs_chunk_del(in->my_dev, in->hdr_chunk, 1, __LINE__); + in->hdr_chunk = 0; + + yaffs_free_obj(in); + return YAFFS_OK; + } +static void yaffs_soft_del_file(struct yaffs_obj *obj) +{ + if (obj->deleted && + obj->variant_type == YAFFS_OBJECT_TYPE_FILE && !obj->soft_del) { + if (obj->n_data_chunks <= 0) { + /* Empty file with no duplicate object headers, + * just delete it immediately */ + yaffs_free_tnode(obj->my_dev, + obj->variant.file_variant.top); + obj->variant.file_variant.top = NULL; + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: Deleting empty file %d", + obj->obj_id); + yaffs_generic_obj_del(obj); + } else { + yaffs_soft_del_worker(obj, + obj->variant.file_variant.top, + obj->variant. + file_variant.top_level, 0); + obj->soft_del = 1; + } + } +} + +/* Pruning removes any part of the file structure tree that is beyond the + * bounds of the file (ie that does not point to chunks). + * + * A file should only get pruned when its size is reduced. + * + * Before pruning, the chunks must be pulled from the tree and the + * level 0 tnode entries must be zeroed out. + * Could also use this for file deletion, but that's probably better handled + * by a special case. + * + * This function is recursive. For levels > 0 the function is called again on + * any sub-tree. For level == 0 we just check if the sub-tree has data. + * If there is no data in a subtree then it is pruned. + */ -static void yaffs_DeinitialiseObjects(yaffs_Device *dev) +static struct yaffs_tnode *yaffs_prune_worker(struct yaffs_dev *dev, + struct yaffs_tnode *tn, u32 level, + int del0) { - /* Free the list of allocated Objects */ + int i; + int has_data; + + if (tn) { + has_data = 0; + + if (level > 0) { + for (i = 0; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) { + tn->internal[i] = + yaffs_prune_worker(dev, + tn->internal[i], + level - 1, + (i == + 0) ? del0 : 1); + } - yaffs_ObjectList *tmp; + if (tn->internal[i]) + has_data++; + } + } else { + int tnode_size_u32 = dev->tnode_size / sizeof(u32); + u32 *map = (u32 *) tn; - while (dev->allocatedObjectList) { - tmp = dev->allocatedObjectList->next; - YFREE(dev->allocatedObjectList->objects); - YFREE(dev->allocatedObjectList); + for (i = 0; !has_data && i < tnode_size_u32; i++) { + if (map[i]) + has_data++; + } + } + + if (has_data == 0 && del0) { + /* Free and return NULL */ + + yaffs_free_tnode(dev, tn); + tn = NULL; + } - dev->allocatedObjectList = tmp; } - dev->freeObjects = NULL; - dev->nFreeObjects = 0; - dev->nObjectsCreated = 0; + return tn; + } -static void yaffs_InitialiseObjects(yaffs_Device *dev) +static int yaffs_prune_tree(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct) { int i; + int has_data; + int done = 0; + struct yaffs_tnode *tn; - dev->allocatedObjectList = NULL; - dev->freeObjects = NULL; - dev->nFreeObjects = 0; + if (file_struct->top_level > 0) { + file_struct->top = + yaffs_prune_worker(dev, file_struct->top, + file_struct->top_level, 0); - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - YINIT_LIST_HEAD(&dev->objectBucket[i].list); - dev->objectBucket[i].count = 0; + /* Now we have a tree with all the non-zero branches NULL but the height + * is the same as it was. + * Let's see if we can trim internal tnodes to shorten the tree. + * We can do this if only the 0th element in the tnode is in use + * (ie all the non-zero are NULL) + */ + + while (file_struct->top_level && !done) { + tn = file_struct->top; + + has_data = 0; + for (i = 1; i < YAFFS_NTNODES_INTERNAL; i++) { + if (tn->internal[i]) + has_data++; + } + + if (!has_data) { + file_struct->top = tn->internal[0]; + file_struct->top_level--; + yaffs_free_tnode(dev, tn); + } else { + done = 1; + } + } + } + + return YAFFS_OK; +} + +/*-------------------- End of File Structure functions.-------------------*/ + +/* AllocateEmptyObject gets us a clean Object. Tries to make allocate more if we run out */ +static struct yaffs_obj *yaffs_alloc_empty_obj(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj = yaffs_alloc_raw_obj(dev); + + if (obj) { + dev->n_obj++; + + /* Now sweeten it up... */ + + memset(obj, 0, sizeof(struct yaffs_obj)); + obj->being_created = 1; + + obj->my_dev = dev; + obj->hdr_chunk = 0; + obj->variant_type = YAFFS_OBJECT_TYPE_UNKNOWN; + INIT_LIST_HEAD(&(obj->hard_links)); + INIT_LIST_HEAD(&(obj->hash_link)); + INIT_LIST_HEAD(&obj->siblings); + + /* Now make the directory sane */ + if (dev->root_dir) { + obj->parent = dev->root_dir; + list_add(&(obj->siblings), + &dev->root_dir->variant.dir_variant.children); + } + + /* Add it to the lost and found directory. + * NB Can't put root or lost-n-found in lost-n-found so + * check if lost-n-found exists first + */ + if (dev->lost_n_found) + yaffs_add_obj_to_dir(dev->lost_n_found, obj); + + obj->being_created = 0; } + + dev->checkpoint_blocks_required = 0; /* force recalculation */ + + return obj; } -static int yaffs_FindNiceObjectBucket(yaffs_Device *dev) +static int yaffs_find_nice_bucket(struct yaffs_dev *dev) { int i; int l = 999; int lowest = 999999; - /* Search for the shortest list or one that * isn't too long. */ for (i = 0; i < 10 && lowest > 4; i++) { - dev->bucketFinder++; - dev->bucketFinder %= YAFFS_NOBJECT_BUCKETS; - if (dev->objectBucket[dev->bucketFinder].count < lowest) { - lowest = dev->objectBucket[dev->bucketFinder].count; - l = dev->bucketFinder; + dev->bucket_finder++; + dev->bucket_finder %= YAFFS_NOBJECT_BUCKETS; + if (dev->obj_bucket[dev->bucket_finder].count < lowest) { + lowest = dev->obj_bucket[dev->bucket_finder].count; + l = dev->bucket_finder; } } @@ -2259,29 +1903,29 @@ static int yaffs_FindNiceObjectBucket(yaffs_Device *dev) return l; } -static int yaffs_CreateNewObjectNumber(yaffs_Device *dev) +static int yaffs_new_obj_id(struct yaffs_dev *dev) { - int bucket = yaffs_FindNiceObjectBucket(dev); + int bucket = yaffs_find_nice_bucket(dev); /* Now find an object value that has not already been taken * by scanning the list. */ int found = 0; - struct ylist_head *i; + struct list_head *i; - __u32 n = (__u32) bucket; + u32 n = (u32) bucket; - /* yaffs_CheckObjectHashSanity(); */ + /* yaffs_check_obj_hash_sane(); */ while (!found) { found = 1; n += YAFFS_NOBJECT_BUCKETS; - if (1 || dev->objectBucket[bucket].count > 0) { - ylist_for_each(i, &dev->objectBucket[bucket].list) { + if (1 || dev->obj_bucket[bucket].count > 0) { + list_for_each(i, &dev->obj_bucket[bucket].list) { /* If there is already one in the list */ - if (i && ylist_entry(i, yaffs_Object, - hashLink)->objectId == n) { + if (i && list_entry(i, struct yaffs_obj, + hash_link)->obj_id == n) { found = 0; } } @@ -2291,29 +1935,29 @@ static int yaffs_CreateNewObjectNumber(yaffs_Device *dev) return n; } -static void yaffs_HashObject(yaffs_Object *in) +static void yaffs_hash_obj(struct yaffs_obj *in) { - int bucket = yaffs_HashFunction(in->objectId); - yaffs_Device *dev = in->myDev; + int bucket = yaffs_hash_fn(in->obj_id); + struct yaffs_dev *dev = in->my_dev; - ylist_add(&in->hashLink, &dev->objectBucket[bucket].list); - dev->objectBucket[bucket].count++; + list_add(&in->hash_link, &dev->obj_bucket[bucket].list); + dev->obj_bucket[bucket].count++; } -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number) +struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number) { - int bucket = yaffs_HashFunction(number); - struct ylist_head *i; - yaffs_Object *in; + int bucket = yaffs_hash_fn(number); + struct list_head *i; + struct yaffs_obj *in; - ylist_for_each(i, &dev->objectBucket[bucket].list) { + list_for_each(i, &dev->obj_bucket[bucket].list) { /* Look if it is in the list */ if (i) { - in = ylist_entry(i, yaffs_Object, hashLink); - if (in->objectId == number) { + in = list_entry(i, struct yaffs_obj, hash_link); + if (in->obj_id == number) { /* Don't tell the VFS about this one if it is defered free */ - if (in->deferedFree) + if (in->defered_free) return NULL; return in; @@ -2324,61 +1968,48 @@ yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number) return NULL; } -yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number, - yaffs_ObjectType type) +struct yaffs_obj *yaffs_new_obj(struct yaffs_dev *dev, int number, + enum yaffs_obj_type type) { - yaffs_Object *theObject=NULL; - yaffs_Tnode *tn = NULL; + struct yaffs_obj *the_obj = NULL; + struct yaffs_tnode *tn = NULL; if (number < 0) - number = yaffs_CreateNewObjectNumber(dev); + number = yaffs_new_obj_id(dev); if (type == YAFFS_OBJECT_TYPE_FILE) { - tn = yaffs_GetTnode(dev); + tn = yaffs_get_tnode(dev); if (!tn) return NULL; } - theObject = yaffs_AllocateEmptyObject(dev); - if (!theObject){ - if(tn) - yaffs_FreeTnode(dev,tn); + the_obj = yaffs_alloc_empty_obj(dev); + if (!the_obj) { + if (tn) + yaffs_free_tnode(dev, tn); return NULL; } + if (the_obj) { + the_obj->fake = 0; + the_obj->rename_allowed = 1; + the_obj->unlink_allowed = 1; + the_obj->obj_id = number; + yaffs_hash_obj(the_obj); + the_obj->variant_type = type; + yaffs_load_current_time(the_obj, 1, 1); - if (theObject) { - theObject->fake = 0; - theObject->renameAllowed = 1; - theObject->unlinkAllowed = 1; - theObject->objectId = number; - yaffs_HashObject(theObject); - theObject->variantType = type; -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(theObject->win_atime); - theObject->win_ctime[0] = theObject->win_mtime[0] = - theObject->win_atime[0]; - theObject->win_ctime[1] = theObject->win_mtime[1] = - theObject->win_atime[1]; - -#else - - theObject->yst_atime = theObject->yst_mtime = - theObject->yst_ctime = Y_CURRENT_TIME; -#endif switch (type) { case YAFFS_OBJECT_TYPE_FILE: - theObject->variant.fileVariant.fileSize = 0; - theObject->variant.fileVariant.scannedFileSize = 0; - theObject->variant.fileVariant.shrinkSize = 0xFFFFFFFF; /* max __u32 */ - theObject->variant.fileVariant.topLevel = 0; - theObject->variant.fileVariant.top = tn; + the_obj->variant.file_variant.file_size = 0; + the_obj->variant.file_variant.scanned_size = 0; + the_obj->variant.file_variant.shrink_size = ~0; /* max */ + the_obj->variant.file_variant.top_level = 0; + the_obj->variant.file_variant.top = tn; break; case YAFFS_OBJECT_TYPE_DIRECTORY: - YINIT_LIST_HEAD(&theObject->variant.directoryVariant. - children); - YINIT_LIST_HEAD(&theObject->variant.directoryVariant. - dirty); + INIT_LIST_HEAD(&the_obj->variant.dir_variant.children); + INIT_LIST_HEAD(&the_obj->variant.dir_variant.dirty); break; case YAFFS_OBJECT_TYPE_SYMLINK: case YAFFS_OBJECT_TYPE_HARDLINK: @@ -2391,125 +2022,209 @@ yaffs_Object *yaffs_CreateNewObject(yaffs_Device *dev, int number, } } - return theObject; + return the_obj; } -static yaffs_Object *yaffs_FindOrCreateObjectByNumber(yaffs_Device *dev, - int number, - yaffs_ObjectType type) +static struct yaffs_obj *yaffs_create_fake_dir(struct yaffs_dev *dev, + int number, u32 mode) { - yaffs_Object *theObject = NULL; - if (number > 0) - theObject = yaffs_FindObjectByNumber(dev, number); + struct yaffs_obj *obj = + yaffs_new_obj(dev, number, YAFFS_OBJECT_TYPE_DIRECTORY); + if (obj) { + obj->fake = 1; /* it is fake so it might have no NAND presence... */ + obj->rename_allowed = 0; /* ... and we're not allowed to rename it... */ + obj->unlink_allowed = 0; /* ... or unlink it */ + obj->deleted = 0; + obj->unlinked = 0; + obj->yst_mode = mode; + obj->my_dev = dev; + obj->hdr_chunk = 0; /* Not a valid chunk. */ + } + + return obj; + +} + + +static void yaffs_init_tnodes_and_objs(struct yaffs_dev *dev) +{ + int i; - if (!theObject) - theObject = yaffs_CreateNewObject(dev, number, type); + dev->n_obj = 0; + dev->n_tnodes = 0; - return theObject; + yaffs_init_raw_tnodes_and_objs(dev); + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + INIT_LIST_HEAD(&dev->obj_bucket[i].list); + dev->obj_bucket[i].count = 0; + } } +struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, + int number, + enum yaffs_obj_type type) +{ + struct yaffs_obj *the_obj = NULL; -static YCHAR *yaffs_CloneString(const YCHAR *str) + if (number > 0) + the_obj = yaffs_find_by_number(dev, number); + + if (!the_obj) + the_obj = yaffs_new_obj(dev, number, type); + + return the_obj; + +} + +YCHAR *yaffs_clone_str(const YCHAR * str) { - YCHAR *newStr = NULL; + YCHAR *new_str = NULL; int len; if (!str) str = _Y(""); - len = yaffs_strnlen(str,YAFFS_MAX_ALIAS_LENGTH); - newStr = YMALLOC((len + 1) * sizeof(YCHAR)); - if (newStr){ - yaffs_strncpy(newStr, str,len); - newStr[len] = 0; + len = strnlen(str, YAFFS_MAX_ALIAS_LENGTH); + new_str = kmalloc((len + 1) * sizeof(YCHAR), GFP_NOFS); + if (new_str) { + strncpy(new_str, str, len); + new_str[len] = 0; } - return newStr; + return new_str; + +} +/* + *yaffs_update_parent() handles fixing a directories mtime and ctime when a new + * link (ie. name) is created or deleted in the directory. + * + * ie. + * create dir/a : update dir's mtime/ctime + * rm dir/a: update dir's mtime/ctime + * modify dir/a: don't update dir's mtimme/ctime + * + * This can be handled immediately or defered. Defering helps reduce the number + * of updates when many files in a directory are changed within a brief period. + * + * If the directory updating is defered then yaffs_update_dirty_dirs must be + * called periodically. + */ + +static void yaffs_update_parent(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev; + if (!obj) + return; + dev = obj->my_dev; + obj->dirty = 1; + yaffs_load_current_time(obj, 0, 1); + if (dev->param.defered_dir_update) { + struct list_head *link = &obj->variant.dir_variant.dirty; + + if (list_empty(link)) { + list_add(link, &dev->dirty_dirs); + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Added object %d to dirty directories", + obj->obj_id); + } + } else { + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); + } +} + +void yaffs_update_dirty_dirs(struct yaffs_dev *dev) +{ + struct list_head *link; + struct yaffs_obj *obj; + struct yaffs_dir_var *d_s; + union yaffs_obj_var *o_v; + + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update dirty directories"); + + while (!list_empty(&dev->dirty_dirs)) { + link = dev->dirty_dirs.next; + list_del_init(link); + + d_s = list_entry(link, struct yaffs_dir_var, dirty); + o_v = list_entry(d_s, union yaffs_obj_var, dir_variant); + obj = list_entry(o_v, struct yaffs_obj, variant); + + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Update directory %d", + obj->obj_id); + + if (obj->dirty) + yaffs_update_oh(obj, NULL, 0, 0, 0, NULL); + } } /* * Mknod (create) a new object. - * equivalentObject only has meaning for a hard link; - * aliasString only has meaning for a symlink. + * equiv_obj only has meaning for a hard link; + * alias_str only has meaning for a symlink. * rdev only has meaning for devices (a subset of special objects) */ -static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, - yaffs_Object *parent, - const YCHAR *name, - __u32 mode, - __u32 uid, - __u32 gid, - yaffs_Object *equivalentObject, - const YCHAR *aliasString, __u32 rdev) +static struct yaffs_obj *yaffs_create_obj(enum yaffs_obj_type type, + struct yaffs_obj *parent, + const YCHAR * name, + u32 mode, + u32 uid, + u32 gid, + struct yaffs_obj *equiv_obj, + const YCHAR * alias_str, u32 rdev) { - yaffs_Object *in; + struct yaffs_obj *in; YCHAR *str = NULL; - yaffs_Device *dev = parent->myDev; + struct yaffs_dev *dev = parent->my_dev; - /* Check if the entry exists. If it does then fail the call since we don't want a dup.*/ - if (yaffs_FindObjectByName(parent, name)) + /* Check if the entry exists. If it does then fail the call since we don't want a dup. */ + if (yaffs_find_by_name(parent, name)) return NULL; if (type == YAFFS_OBJECT_TYPE_SYMLINK) { - str = yaffs_CloneString(aliasString); + str = yaffs_clone_str(alias_str); if (!str) return NULL; } - in = yaffs_CreateNewObject(dev, -1, type); + in = yaffs_new_obj(dev, -1, type); - if (!in){ - if(str) - YFREE(str); + if (!in) { + if (str) + kfree(str); return NULL; } - - - - if (in) { - in->hdrChunk = 0; + in->hdr_chunk = 0; in->valid = 1; - in->variantType = type; + in->variant_type = type; in->yst_mode = mode; -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_atime); - in->win_ctime[0] = in->win_mtime[0] = in->win_atime[0]; - in->win_ctime[1] = in->win_mtime[1] = in->win_atime[1]; + yaffs_attribs_init(in, gid, uid, rdev); -#else - in->yst_atime = in->yst_mtime = in->yst_ctime = Y_CURRENT_TIME; + in->n_data_chunks = 0; - in->yst_rdev = rdev; - in->yst_uid = uid; - in->yst_gid = gid; -#endif - in->nDataChunks = 0; - - yaffs_SetObjectName(in, name); + yaffs_set_obj_name(in, name); in->dirty = 1; - yaffs_AddObjectToDirectory(parent, in); + yaffs_add_obj_to_dir(parent, in); - in->myDev = parent->myDev; + in->my_dev = parent->my_dev; switch (type) { case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = str; + in->variant.symlink_variant.alias = str; break; case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant.equivalentObject = - equivalentObject; - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObject->objectId; - ylist_add(&in->hardLinks, &equivalentObject->hardLinks); + in->variant.hardlink_variant.equiv_obj = equiv_obj; + in->variant.hardlink_variant.equiv_id = + equiv_obj->obj_id; + list_add(&in->hard_links, &equiv_obj->hard_links); break; case YAFFS_OBJECT_TYPE_FILE: case YAFFS_OBJECT_TYPE_DIRECTORY: @@ -2519,740 +2234,355 @@ static yaffs_Object *yaffs_MknodObject(yaffs_ObjectType type, break; } - if (yaffs_UpdateObjectHeader(in, name, 0, 0, 0) < 0) { + if (yaffs_update_oh(in, name, 0, 0, 0, NULL) < 0) { /* Could not create the object header, fail the creation */ - yaffs_DeleteObject(in); + yaffs_del_obj(in); in = NULL; } - yaffs_UpdateParent(parent); + yaffs_update_parent(parent); } return in; } -yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid) +struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, + const YCHAR * name, u32 mode, u32 uid, + u32 gid) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, + return yaffs_create_obj(YAFFS_OBJECT_TYPE_FILE, parent, name, mode, uid, gid, NULL, NULL, 0); } -yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid) +struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR * name, + u32 mode, u32 uid, u32 gid) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, - mode, uid, gid, NULL, NULL, 0); + return yaffs_create_obj(YAFFS_OBJECT_TYPE_DIRECTORY, parent, name, + mode, uid, gid, NULL, NULL, 0); } -yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev) +struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, + const YCHAR * name, u32 mode, u32 uid, + u32 gid, u32 rdev) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, - uid, gid, NULL, NULL, rdev); + return yaffs_create_obj(YAFFS_OBJECT_TYPE_SPECIAL, parent, name, mode, + uid, gid, NULL, NULL, rdev); } -yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR *alias) +struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, + const YCHAR * name, u32 mode, u32 uid, + u32 gid, const YCHAR * alias) { - return yaffs_MknodObject(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, + return yaffs_create_obj(YAFFS_OBJECT_TYPE_SYMLINK, parent, name, mode, uid, gid, NULL, alias, 0); } -/* yaffs_Link returns the object id of the equivalent object.*/ -yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, - yaffs_Object *equivalentObject) +/* yaffs_link_obj returns the object id of the equivalent object.*/ +struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, + struct yaffs_obj *equiv_obj) { /* Get the real object in case we were fed a hard link as an equivalent object */ - equivalentObject = yaffs_GetEquivalentObject(equivalentObject); + equiv_obj = yaffs_get_equivalent_obj(equiv_obj); - if (yaffs_MknodObject + if (yaffs_create_obj (YAFFS_OBJECT_TYPE_HARDLINK, parent, name, 0, 0, 0, - equivalentObject, NULL, 0)) { - return equivalentObject; + equiv_obj, NULL, 0)) { + return equiv_obj; } else { return NULL; } } -static int yaffs_ChangeObjectName(yaffs_Object *obj, yaffs_Object *newDir, - const YCHAR *newName, int force, int shadows) -{ - int unlinkOp; - int deleteOp; - - yaffs_Object *existingTarget; - - if (newDir == NULL) - newDir = obj->parent; /* use the old directory */ - - if (newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_ChangeObjectName: newDir is not a directory" - TENDSTR))); - YBUG(); - } - - /* TODO: Do we need this different handling for YAFFS2 and YAFFS1?? */ - if (obj->myDev->param.isYaffs2) - unlinkOp = (newDir == obj->myDev->unlinkedDir); - else - unlinkOp = (newDir == obj->myDev->unlinkedDir - && obj->variantType == YAFFS_OBJECT_TYPE_FILE); - deleteOp = (newDir == obj->myDev->deletedDir); - - existingTarget = yaffs_FindObjectByName(newDir, newName); - - /* If the object is a file going into the unlinked directory, - * then it is OK to just stuff it in since duplicate names are allowed. - * else only proceed if the new name does not exist and if we're putting - * it into a directory. - */ - if ((unlinkOp || - deleteOp || - force || - (shadows > 0) || - !existingTarget) && - newDir->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) { - yaffs_SetObjectName(obj, newName); - obj->dirty = 1; - - yaffs_AddObjectToDirectory(newDir, obj); - - if (unlinkOp) - obj->unlinked = 1; - - /* If it is a deletion then we mark it as a shrink for gc purposes. */ - if (yaffs_UpdateObjectHeader(obj, newName, 0, deleteOp, shadows) >= 0) - return YAFFS_OK; - } - - return YAFFS_FAIL; -} - -int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, - yaffs_Object *newDir, const YCHAR *newName) -{ - yaffs_Object *obj = NULL; - yaffs_Object *existingTarget = NULL; - int force = 0; - int result; - yaffs_Device *dev; - - - if (!oldDir || oldDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); - if (!newDir || newDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) - YBUG(); - - dev = oldDir->myDev; - -#ifdef CONFIG_YAFFS_CASE_INSENSITIVE - /* Special case for case insemsitive systems (eg. WinCE). - * While look-up is case insensitive, the name isn't. - * Therefore we might want to change x.txt to X.txt - */ - if (oldDir == newDir && yaffs_strcmp(oldName, newName) == 0) - force = 1; -#endif - - if(yaffs_strnlen(newName,YAFFS_MAX_NAME_LENGTH+1) > YAFFS_MAX_NAME_LENGTH) - /* ENAMETOOLONG */ - return YAFFS_FAIL; - - obj = yaffs_FindObjectByName(oldDir, oldName); - - if (obj && obj->renameAllowed) { - - /* Now do the handling for an existing target, if there is one */ - - existingTarget = yaffs_FindObjectByName(newDir, newName); - if (existingTarget && - existingTarget->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && - !ylist_empty(&existingTarget->variant.directoryVariant.children)) { - /* There is a target that is a non-empty directory, so we fail */ - return YAFFS_FAIL; /* EEXIST or ENOTEMPTY */ - } else if (existingTarget && existingTarget != obj) { - /* Nuke the target first, using shadowing, - * but only if it isn't the same object. - * - * Note we must disable gc otherwise it can mess up the shadowing. - * - */ - dev->gcDisable=1; - yaffs_ChangeObjectName(obj, newDir, newName, force, - existingTarget->objectId); - existingTarget->isShadowed = 1; - yaffs_UnlinkObject(existingTarget); - dev->gcDisable=0; - } - - result = yaffs_ChangeObjectName(obj, newDir, newName, 1, 0); - - yaffs_UpdateParent(oldDir); - if(newDir != oldDir) - yaffs_UpdateParent(newDir); - - return result; - } - return YAFFS_FAIL; -} /*------------------------- Block Management and Page Allocation ----------------*/ -static int yaffs_InitialiseBlocks(yaffs_Device *dev) +static int yaffs_init_blocks(struct yaffs_dev *dev) { - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; + int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; - dev->blockInfo = NULL; - dev->chunkBits = NULL; + dev->block_info = NULL; + dev->chunk_bits = NULL; - dev->allocationBlock = -1; /* force it to get a new one */ + dev->alloc_block = -1; /* force it to get a new one */ /* If the first allocation strategy fails, thry the alternate one */ - dev->blockInfo = YMALLOC(nBlocks * sizeof(yaffs_BlockInfo)); - if (!dev->blockInfo) { - dev->blockInfo = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockInfo)); - dev->blockInfoAlt = 1; - } else - dev->blockInfoAlt = 0; - - if (dev->blockInfo) { - /* Set up dynamic blockinfo stuff. */ - dev->chunkBitmapStride = (dev->param.nChunksPerBlock + 7) / 8; /* round up bytes */ - dev->chunkBits = YMALLOC(dev->chunkBitmapStride * nBlocks); - if (!dev->chunkBits) { - dev->chunkBits = YMALLOC_ALT(dev->chunkBitmapStride * nBlocks); - dev->chunkBitsAlt = 1; - } else - dev->chunkBitsAlt = 0; - } - - if (dev->blockInfo && dev->chunkBits) { - memset(dev->blockInfo, 0, nBlocks * sizeof(yaffs_BlockInfo)); - memset(dev->chunkBits, 0, dev->chunkBitmapStride * nBlocks); + dev->block_info = + kmalloc(n_blocks * sizeof(struct yaffs_block_info), GFP_NOFS); + if (!dev->block_info) { + dev->block_info = + vmalloc(n_blocks * sizeof(struct yaffs_block_info)); + dev->block_info_alt = 1; + } else { + dev->block_info_alt = 0; + } + + if (dev->block_info) { + /* Set up dynamic blockinfo stuff. Round up bytes. */ + dev->chunk_bit_stride = (dev->param.chunks_per_block + 7) / 8; + dev->chunk_bits = + kmalloc(dev->chunk_bit_stride * n_blocks, GFP_NOFS); + if (!dev->chunk_bits) { + dev->chunk_bits = + vmalloc(dev->chunk_bit_stride * n_blocks); + dev->chunk_bits_alt = 1; + } else { + dev->chunk_bits_alt = 0; + } + } + + if (dev->block_info && dev->chunk_bits) { + memset(dev->block_info, 0, + n_blocks * sizeof(struct yaffs_block_info)); + memset(dev->chunk_bits, 0, dev->chunk_bit_stride * n_blocks); return YAFFS_OK; } return YAFFS_FAIL; } -static void yaffs_DeinitialiseBlocks(yaffs_Device *dev) -{ - if (dev->blockInfoAlt && dev->blockInfo) - YFREE_ALT(dev->blockInfo); - else if (dev->blockInfo) - YFREE(dev->blockInfo); - - dev->blockInfoAlt = 0; - - dev->blockInfo = NULL; - - if (dev->chunkBitsAlt && dev->chunkBits) - YFREE_ALT(dev->chunkBits); - else if (dev->chunkBits) - YFREE(dev->chunkBits); - dev->chunkBitsAlt = 0; - dev->chunkBits = NULL; -} - -static int yaffs_BlockNotDisqualifiedFromGC(yaffs_Device *dev, - yaffs_BlockInfo *bi) +static void yaffs_deinit_blocks(struct yaffs_dev *dev) { + if (dev->block_info_alt && dev->block_info) + vfree(dev->block_info); + else if (dev->block_info) + kfree(dev->block_info); - if (!dev->param.isYaffs2) - return 1; /* disqualification only applies to yaffs2. */ + dev->block_info_alt = 0; - if (!bi->hasShrinkHeader) - return 1; /* can gc */ + dev->block_info = NULL; - yaffs_FindOldestDirtySequence(dev); - - /* Can't do gc of this block if there are any blocks older than this one that have - * discarded pages. - */ - return (bi->sequenceNumber <= dev->oldestDirtySequence); + if (dev->chunk_bits_alt && dev->chunk_bits) + vfree(dev->chunk_bits); + else if (dev->chunk_bits) + kfree(dev->chunk_bits); + dev->chunk_bits_alt = 0; + dev->chunk_bits = NULL; } -/* - * yaffs_FindRefreshBlock() - * periodically finds the oldest full block by sequence number for refreshing. - * Only for yaffs2. - */ -static __u32 yaffs_FindRefreshBlock(yaffs_Device *dev) +void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no) { - __u32 b ; - - __u32 oldest = 0; - __u32 oldestSequence = 0; + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block_no); - yaffs_BlockInfo *bi; - - /* - * If refresh period < 10 then refreshing is disabled. - */ - if(dev->param.refreshPeriod < 10 || - !dev->param.isYaffs2) - return oldest; - - /* - * Fix broken values. - */ - if(dev->refreshSkip > dev->param.refreshPeriod) - dev->refreshSkip = dev->param.refreshPeriod; - - if(dev->refreshSkip > 0) - return oldest; - - /* - * Refresh skip is now zero. - * We'll do a refresh this time around.... - * Update the refresh skip and find the oldest block. - */ - dev->refreshSkip = dev->param.refreshPeriod; - dev->refreshCount++; - bi = dev->blockInfo; - for (b = dev->internalStartBlock; b <=dev->internalEndBlock; b++){ - - if (bi->blockState == YAFFS_BLOCK_STATE_FULL){ - - if(oldest < 1 || - bi->sequenceNumber < oldestSequence){ - oldest = b; - oldestSequence = bi->sequenceNumber; - } - } - bi++; - } - - if (oldest > 0) { - T(YAFFS_TRACE_GC, - (TSTR("GC refresh count %d selected block %d with sequenceNumber %d" TENDSTR), - dev->refreshCount, oldest, oldestSequence)); - } - - return oldest; -} - - -static void yaffs_BlockBecameDirty(yaffs_Device *dev, int blockNo) -{ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, blockNo); - - int erasedOk = 0; + int erased_ok = 0; /* If the block is still healthy erase it and mark as clean. * If the block has had a data failure, then retire it. */ - T(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, - (TSTR("yaffs_BlockBecameDirty block %d state %d %s"TENDSTR), - blockNo, bi->blockState, (bi->needsRetiring) ? "needs retiring" : "")); + yaffs_trace(YAFFS_TRACE_GC | YAFFS_TRACE_ERASE, + "yaffs_block_became_dirty block %d state %d %s", + block_no, bi->block_state, + (bi->needs_retiring) ? "needs retiring" : ""); - yaffs_ClearOldestDirtySequence(dev,bi); + yaffs2_clear_oldest_dirty_seq(dev, bi); - bi->blockState = YAFFS_BLOCK_STATE_DIRTY; + bi->block_state = YAFFS_BLOCK_STATE_DIRTY; /* If this is the block being garbage collected then stop gc'ing this block */ - if(blockNo == dev->gcBlock) - dev->gcBlock = 0; + if (block_no == dev->gc_block) + dev->gc_block = 0; /* If this block is currently the best candidate for gc then drop as a candidate */ - if(blockNo == dev->gcDirtiest){ - dev->gcDirtiest = 0; - dev->gcPagesInUse = 0; - } - - if (!bi->needsRetiring) { - yaffs_InvalidateCheckpoint(dev); - erasedOk = yaffs_EraseBlockInNAND(dev, blockNo); - if (!erasedOk) { - dev->nErasureFailures++; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Erasure failed %d" TENDSTR), blockNo)); + if (block_no == dev->gc_dirtiest) { + dev->gc_dirtiest = 0; + dev->gc_pages_in_use = 0; + } + + if (!bi->needs_retiring) { + yaffs2_checkpt_invalidate(dev); + erased_ok = yaffs_erase_block(dev, block_no); + if (!erased_ok) { + dev->n_erase_failures++; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Erasure failed %d", block_no); } } - if (erasedOk && - ((yaffs_traceMask & YAFFS_TRACE_ERASE) || !yaffs_SkipVerification(dev))) { + if (erased_ok && + ((yaffs_trace_mask & YAFFS_TRACE_ERASE) + || !yaffs_skip_verification(dev))) { int i; - for (i = 0; i < dev->param.nChunksPerBlock; i++) { - if (!yaffs_CheckChunkErased - (dev, blockNo * dev->param.nChunksPerBlock + i)) { - T(YAFFS_TRACE_ERROR, - (TSTR - (">>Block %d erasure supposedly OK, but chunk %d not erased" - TENDSTR), blockNo, i)); + for (i = 0; i < dev->param.chunks_per_block; i++) { + if (!yaffs_check_chunk_erased + (dev, block_no * dev->param.chunks_per_block + i)) { + yaffs_trace(YAFFS_TRACE_ERROR, + ">>Block %d erasure supposedly OK, but chunk %d not erased", + block_no, i); } } } - if (erasedOk) { + if (erased_ok) { /* Clean it up... */ - bi->blockState = YAFFS_BLOCK_STATE_EMPTY; - bi->sequenceNumber = 0; - dev->nErasedBlocks++; - bi->pagesInUse = 0; - bi->softDeletions = 0; - bi->hasShrinkHeader = 0; - bi->skipErasedCheck = 1; /* This is clean, so no need to check */ - bi->gcPrioritise = 0; - yaffs_ClearChunkBits(dev, blockNo); - - T(YAFFS_TRACE_ERASE, - (TSTR("Erased block %d" TENDSTR), blockNo)); - } else { - dev->nFreeChunks -= dev->param.nChunksPerBlock; /* We lost a block of free space */ - - yaffs_RetireBlock(dev, blockNo); - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>> Block %d retired" TENDSTR), blockNo)); - } -} - -static int yaffs_FindBlockForAllocation(yaffs_Device *dev) -{ - int i; - - yaffs_BlockInfo *bi; - - if (dev->nErasedBlocks < 1) { - /* Hoosterman we've got a problem. - * Can't get space to gc - */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no more erased blocks" TENDSTR))); - - return -1; - } - - /* Find an empty block. */ - - for (i = dev->internalStartBlock; i <= dev->internalEndBlock; i++) { - dev->allocationBlockFinder++; - if (dev->allocationBlockFinder < dev->internalStartBlock - || dev->allocationBlockFinder > dev->internalEndBlock) { - dev->allocationBlockFinder = dev->internalStartBlock; - } - - bi = yaffs_GetBlockInfo(dev, dev->allocationBlockFinder); - - if (bi->blockState == YAFFS_BLOCK_STATE_EMPTY) { - bi->blockState = YAFFS_BLOCK_STATE_ALLOCATING; - dev->sequenceNumber++; - bi->sequenceNumber = dev->sequenceNumber; - dev->nErasedBlocks--; - T(YAFFS_TRACE_ALLOCATE, - (TSTR("Allocated block %d, seq %d, %d left" TENDSTR), - dev->allocationBlockFinder, dev->sequenceNumber, - dev->nErasedBlocks)); - return dev->allocationBlockFinder; - } - } - - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs tragedy: no more erased blocks, but there should have been %d" - TENDSTR), dev->nErasedBlocks)); - - return -1; -} - - - -static int yaffs_CheckpointRequired(yaffs_Device *dev) -{ - int nblocks = dev->internalEndBlock - dev->internalStartBlock + 1 ; - return dev->param.isYaffs2 && - !dev->param.skipCheckpointWrite && - (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS); -} -static int yaffs_CalcCheckpointBlocksRequired(yaffs_Device *dev) -{ - if (!dev->nCheckpointBlocksRequired && - yaffs_CheckpointRequired(dev)){ - /* Not a valid value so recalculate */ - int nBytes = 0; - int nBlocks; - int devBlocks = (dev->param.endBlock - dev->param.startBlock + 1); - int tnodeSize = yaffs_CalcTnodeSize(dev); - - nBytes += sizeof(yaffs_CheckpointValidity); - nBytes += sizeof(yaffs_CheckpointDevice); - nBytes += devBlocks * sizeof(yaffs_BlockInfo); - nBytes += devBlocks * dev->chunkBitmapStride; - nBytes += (sizeof(yaffs_CheckpointObject) + sizeof(__u32)) * (dev->nObjectsCreated - dev->nFreeObjects); - nBytes += (tnodeSize + sizeof(__u32)) * (dev->nTnodesCreated - dev->nFreeTnodes); - nBytes += sizeof(yaffs_CheckpointValidity); - nBytes += sizeof(__u32); /* checksum*/ - - /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */ - - nBlocks = (nBytes/(dev->nDataBytesPerChunk * dev->param.nChunksPerBlock)) + 3; - - dev->nCheckpointBlocksRequired = nBlocks; - } - - return dev->nCheckpointBlocksRequired; -} - -/* - * Check if there's space to allocate... - * Thinks.... do we need top make this ths same as yaffs_GetFreeChunks()? - */ -static int yaffs_CheckSpaceForAllocation(yaffs_Device *dev, int nChunks) -{ - int reservedChunks; - int reservedBlocks = dev->param.nReservedBlocks; - int checkpointBlocks; - - if (dev->param.isYaffs2) { - checkpointBlocks = yaffs_CalcCheckpointBlocksRequired(dev) - - dev->blocksInCheckpoint; - if (checkpointBlocks < 0) - checkpointBlocks = 0; + bi->block_state = YAFFS_BLOCK_STATE_EMPTY; + bi->seq_number = 0; + dev->n_erased_blocks++; + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + bi->has_shrink_hdr = 0; + bi->skip_erased_check = 1; /* Clean, so no need to check */ + bi->gc_prioritise = 0; + yaffs_clear_chunk_bits(dev, block_no); + + yaffs_trace(YAFFS_TRACE_ERASE, + "Erased block %d", block_no); } else { - checkpointBlocks = 0; + /* We lost a block of free space */ + dev->n_free_chunks -= dev->param.chunks_per_block; + yaffs_retire_block(dev, block_no); + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>> Block %d retired", block_no); } - - reservedChunks = ((reservedBlocks + checkpointBlocks) * dev->param.nChunksPerBlock); - - return (dev->nFreeChunks > (reservedChunks + nChunks)); } -static int yaffs_AllocateChunk(yaffs_Device *dev, int useReserve, - yaffs_BlockInfo **blockUsedPtr) -{ - int retVal; - yaffs_BlockInfo *bi; - if (dev->allocationBlock < 0) { - /* Get next block to allocate off */ - dev->allocationBlock = yaffs_FindBlockForAllocation(dev); - dev->allocationPage = 0; - } - if (!useReserve && !yaffs_CheckSpaceForAllocation(dev, 1)) { - /* Not enough space to allocate unless we're allowed to use the reserve. */ - return -1; - } - - if (dev->nErasedBlocks < dev->param.nReservedBlocks - && dev->allocationPage == 0) { - T(YAFFS_TRACE_ALLOCATE, (TSTR("Allocating reserve" TENDSTR))); - } - - /* Next page please.... */ - if (dev->allocationBlock >= 0) { - bi = yaffs_GetBlockInfo(dev, dev->allocationBlock); - - retVal = (dev->allocationBlock * dev->param.nChunksPerBlock) + - dev->allocationPage; - bi->pagesInUse++; - yaffs_SetChunkBit(dev, dev->allocationBlock, - dev->allocationPage); - - dev->allocationPage++; - - dev->nFreeChunks--; - - /* If the block is full set the state to full */ - if (dev->allocationPage >= dev->param.nChunksPerBlock) { - bi->blockState = YAFFS_BLOCK_STATE_FULL; - dev->allocationBlock = -1; - } - - if (blockUsedPtr) - *blockUsedPtr = bi; - - return retVal; - } - - T(YAFFS_TRACE_ERROR, - (TSTR("!!!!!!!!! Allocator out !!!!!!!!!!!!!!!!!" TENDSTR))); - - return -1; -} - -static int yaffs_GetErasedChunks(yaffs_Device *dev) -{ - int n; - - n = dev->nErasedBlocks * dev->param.nChunksPerBlock; - - if (dev->allocationBlock > 0) - n += (dev->param.nChunksPerBlock - dev->allocationPage); - - return n; - -} - -/* - * yaffs_SkipRestOfBlock() skips over the rest of the allocation block - * if we don't want to write to it. - */ -static void yaffs_SkipRestOfBlock(yaffs_Device *dev) +static int yaffs_gc_block(struct yaffs_dev *dev, int block, int whole_block) { - if(dev->allocationBlock > 0){ - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, dev->allocationBlock); - if(bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING){ - bi->blockState = YAFFS_BLOCK_STATE_FULL; - dev->allocationBlock = -1; - } - } -} - - -static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block, - int wholeBlock) -{ - int oldChunk; - int newChunk; - int markNAND; - int retVal = YAFFS_OK; - int cleanups = 0; + int old_chunk; + int new_chunk; + int mark_flash; + int ret_val = YAFFS_OK; int i; - int isCheckpointBlock; - int matchingChunk; - int maxCopies; + int is_checkpt_block; + int matching_chunk; + int max_copies; - int chunksBefore = yaffs_GetErasedChunks(dev); - int chunksAfter; + int chunks_before = yaffs_get_erased_chunks(dev); + int chunks_after; - yaffs_ExtendedTags tags; + struct yaffs_ext_tags tags; - yaffs_BlockInfo *bi = yaffs_GetBlockInfo(dev, block); + struct yaffs_block_info *bi = yaffs_get_block_info(dev, block); - yaffs_Object *object; + struct yaffs_obj *object; - isCheckpointBlock = (bi->blockState == YAFFS_BLOCK_STATE_CHECKPOINT); + is_checkpt_block = (bi->block_state == YAFFS_BLOCK_STATE_CHECKPOINT); + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d, in use %d, shrink %d, whole_block %d", + block, bi->pages_in_use, bi->has_shrink_hdr, + whole_block); - T(YAFFS_TRACE_TRACING, - (TSTR("Collecting block %d, in use %d, shrink %d, wholeBlock %d" TENDSTR), - block, - bi->pagesInUse, - bi->hasShrinkHeader, - wholeBlock)); + /*yaffs_verify_free_chunks(dev); */ - /*yaffs_VerifyFreeChunks(dev); */ + if (bi->block_state == YAFFS_BLOCK_STATE_FULL) + bi->block_state = YAFFS_BLOCK_STATE_COLLECTING; - if(bi->blockState == YAFFS_BLOCK_STATE_FULL) - bi->blockState = YAFFS_BLOCK_STATE_COLLECTING; - - bi->hasShrinkHeader = 0; /* clear the flag so that the block can erase */ + bi->has_shrink_hdr = 0; /* clear the flag so that the block can erase */ - dev->gcDisable = 1; + dev->gc_disable = 1; - if (isCheckpointBlock || - !yaffs_StillSomeChunkBits(dev, block)) { - T(YAFFS_TRACE_TRACING, - (TSTR - ("Collecting block %d that has no chunks in use" TENDSTR), - block)); - yaffs_BlockBecameDirty(dev, block); + if (is_checkpt_block || !yaffs_still_some_chunks(dev, block)) { + yaffs_trace(YAFFS_TRACE_TRACING, + "Collecting block %d that has no chunks in use", + block); + yaffs_block_became_dirty(dev, block); } else { - __u8 *buffer = yaffs_GetTempBuffer(dev, __LINE__); + u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); - yaffs_VerifyBlock(dev, bi, block); + yaffs_verify_blk(dev, bi, block); - maxCopies = (wholeBlock) ? dev->param.nChunksPerBlock : 5; - oldChunk = block * dev->param.nChunksPerBlock + dev->gcChunk; + max_copies = (whole_block) ? dev->param.chunks_per_block : 5; + old_chunk = block * dev->param.chunks_per_block + dev->gc_chunk; - for (/* init already done */; - retVal == YAFFS_OK && - dev->gcChunk < dev->param.nChunksPerBlock && - (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) && - maxCopies > 0; - dev->gcChunk++, oldChunk++) { - if (yaffs_CheckChunkBit(dev, block, dev->gcChunk)) { + for ( /* init already done */ ; + ret_val == YAFFS_OK && + dev->gc_chunk < dev->param.chunks_per_block && + (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) && + max_copies > 0; dev->gc_chunk++, old_chunk++) { + if (yaffs_check_chunk_bit(dev, block, dev->gc_chunk)) { /* This page is in use and might need to be copied off */ - maxCopies--; + max_copies--; - markNAND = 1; + mark_flash = 1; - yaffs_InitialiseTags(&tags); + yaffs_init_tags(&tags); - yaffs_ReadChunkWithTagsFromNAND(dev, oldChunk, - buffer, &tags); + yaffs_rd_chunk_tags_nand(dev, old_chunk, + buffer, &tags); - object = - yaffs_FindObjectByNumber(dev, - tags.objectId); + object = yaffs_find_by_number(dev, tags.obj_id); - T(YAFFS_TRACE_GC_DETAIL, - (TSTR - ("Collecting chunk in block %d, %d %d %d " TENDSTR), - dev->gcChunk, tags.objectId, tags.chunkId, - tags.byteCount)); + yaffs_trace(YAFFS_TRACE_GC_DETAIL, + "Collecting chunk in block %d, %d %d %d ", + dev->gc_chunk, tags.obj_id, + tags.chunk_id, tags.n_bytes); - if (object && !yaffs_SkipVerification(dev)) { - if (tags.chunkId == 0) - matchingChunk = object->hdrChunk; - else if (object->softDeleted) - matchingChunk = oldChunk; /* Defeat the test */ + if (object && !yaffs_skip_verification(dev)) { + if (tags.chunk_id == 0) + matching_chunk = + object->hdr_chunk; + else if (object->soft_del) + matching_chunk = old_chunk; /* Defeat the test */ else - matchingChunk = yaffs_FindChunkInFile(object, tags.chunkId, NULL); - - if (oldChunk != matchingChunk) - T(YAFFS_TRACE_ERROR, - (TSTR("gc: page in gc mismatch: %d %d %d %d"TENDSTR), - oldChunk, matchingChunk, tags.objectId, tags.chunkId)); + matching_chunk = + yaffs_find_chunk_in_file + (object, tags.chunk_id, + NULL); + + if (old_chunk != matching_chunk) + yaffs_trace(YAFFS_TRACE_ERROR, + "gc: page in gc mismatch: %d %d %d %d", + old_chunk, + matching_chunk, + tags.obj_id, + tags.chunk_id); } if (!object) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("page %d in gc has no object: %d %d %d " - TENDSTR), oldChunk, - tags.objectId, tags.chunkId, tags.byteCount)); + yaffs_trace(YAFFS_TRACE_ERROR, + "page %d in gc has no object: %d %d %d ", + old_chunk, + tags.obj_id, tags.chunk_id, + tags.n_bytes); } if (object && object->deleted && - object->softDeleted && - tags.chunkId != 0) { + object->soft_del && tags.chunk_id != 0) { /* Data chunk in a soft deleted file, throw it away * It's a soft deleted data chunk, * No need to copy this, just forget about it and * fix up the object. */ - + /* Free chunks already includes softdeleted chunks. * How ever this chunk is going to soon be really deleted * which will increment free chunks. * We have to decrement free chunks so this works out properly. */ - dev->nFreeChunks--; + dev->n_free_chunks--; + bi->soft_del_pages--; - object->nDataChunks--; + object->n_data_chunks--; - if (object->nDataChunks <= 0) { + if (object->n_data_chunks <= 0) { /* remeber to clean up the object */ - dev->gcCleanupList[cleanups] = - tags.objectId; - cleanups++; + dev->gc_cleanup_list[dev-> + n_clean_ups] + = tags.obj_id; + dev->n_clean_ups++; } - markNAND = 0; + mark_flash = 0; } else if (0) { - /* Todo object && object->deleted && object->nDataChunks == 0 */ + /* Todo object && object->deleted && object->n_data_chunks == 0 */ /* Deleted object header with no data chunks. * Can be discarded and the file deleted. */ - object->hdrChunk = 0; - yaffs_FreeTnode(object->myDev, - object->variant. - fileVariant.top); - object->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(object); + object->hdr_chunk = 0; + yaffs_free_tnode(object->my_dev, + object-> + variant.file_variant. + top); + object->variant.file_variant.top = NULL; + yaffs_generic_obj_del(object); } else if (object) { /* It's either a data chunk in a live file or @@ -3260,120 +2590,129 @@ static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block, * NB Need to keep the ObjectHeaders of deleted files * until the whole file has been deleted off */ - tags.serialNumber++; + tags.serial_number++; - dev->nGCCopies++; + dev->n_gc_copies++; - if (tags.chunkId == 0) { + if (tags.chunk_id == 0) { /* It is an object Id, * We need to nuke the shrinkheader flags first * Also need to clean up shadowing. - * We no longer want the shrinkHeader flag since its work is done + * We no longer want the shrink_header flag since its work is done * and if it is left in place it will mess up scanning. */ - yaffs_ObjectHeader *oh; - oh = (yaffs_ObjectHeader *)buffer; + struct yaffs_obj_hdr *oh; + oh = (struct yaffs_obj_hdr *) + buffer; - oh->isShrink = 0; - tags.extraIsShrinkHeader = 0; + oh->is_shrink = 0; + tags.extra_is_shrink = 0; - oh->shadowsObject = 0; - oh->inbandShadowsObject = 0; - tags.extraShadows = 0; + oh->shadows_obj = 0; + oh->inband_shadowed_obj_id = 0; + tags.extra_shadows = 0; /* Update file size */ - if(object->variantType == YAFFS_OBJECT_TYPE_FILE){ - oh->fileSize = object->variant.fileVariant.fileSize; - tags.extraFileLength = oh->fileSize; + if (object->variant_type == + YAFFS_OBJECT_TYPE_FILE) { + oh->file_size = + object->variant. + file_variant. + file_size; + tags.extra_length = + oh->file_size; } - yaffs_VerifyObjectHeader(object, oh, &tags, 1); - newChunk = - yaffs_WriteNewChunkWithTagsToNAND(dev,(__u8 *) oh, &tags, 1); - } else - newChunk = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &tags, 1); - - if (newChunk < 0) { - retVal = YAFFS_FAIL; + yaffs_verify_oh(object, oh, + &tags, 1); + new_chunk = + yaffs_write_new_chunk(dev, + (u8 *) + oh, + &tags, + 1); + } else { + new_chunk = + yaffs_write_new_chunk(dev, + buffer, + &tags, + 1); + } + + if (new_chunk < 0) { + ret_val = YAFFS_FAIL; } else { /* Ok, now fix up the Tnodes etc. */ - if (tags.chunkId == 0) { + if (tags.chunk_id == 0) { /* It's a header */ - object->hdrChunk = newChunk; - object->serial = tags.serialNumber; + object->hdr_chunk = + new_chunk; + object->serial = + tags.serial_number; } else { /* It's a data chunk */ int ok; - ok = yaffs_PutChunkIntoFile - (object, - tags.chunkId, - newChunk, 0); + ok = yaffs_put_chunk_in_file(object, tags.chunk_id, new_chunk, 0); } } } - if (retVal == YAFFS_OK) - yaffs_DeleteChunk(dev, oldChunk, markNAND, __LINE__); + if (ret_val == YAFFS_OK) + yaffs_chunk_del(dev, old_chunk, + mark_flash, __LINE__); } } - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - - - /* Do any required cleanups */ - for (i = 0; i < cleanups; i++) { - /* Time to delete the file too */ - object = - yaffs_FindObjectByNumber(dev, - dev->gcCleanupList[i]); - if (object) { - yaffs_FreeTnode(dev, - object->variant.fileVariant. - top); - object->variant.fileVariant.top = NULL; - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: About to finally delete object %d" - TENDSTR), object->objectId)); - yaffs_DoGenericObjectDeletion(object); - object->myDev->nDeletedFiles--; - } - - } + yaffs_release_temp_buffer(dev, buffer, __LINE__); } - yaffs_VerifyCollectedBlock(dev, bi, block); + yaffs_verify_collected_blk(dev, bi, block); - - - if (bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { + if (bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { /* * The gc did not complete. Set block state back to FULL * because checkpointing does not restore gc. */ - bi->blockState = YAFFS_BLOCK_STATE_FULL; + bi->block_state = YAFFS_BLOCK_STATE_FULL; } else { /* The gc completed. */ - chunksAfter = yaffs_GetErasedChunks(dev); - if (chunksBefore >= chunksAfter) { - T(YAFFS_TRACE_GC, - (TSTR - ("gc did not increase free chunks before %d after %d" - TENDSTR), chunksBefore, chunksAfter)); + /* Do any required cleanups */ + for (i = 0; i < dev->n_clean_ups; i++) { + /* Time to delete the file too */ + object = + yaffs_find_by_number(dev, dev->gc_cleanup_list[i]); + if (object) { + yaffs_free_tnode(dev, + object->variant. + file_variant.top); + object->variant.file_variant.top = NULL; + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: About to finally delete object %d", + object->obj_id); + yaffs_generic_obj_del(object); + object->my_dev->n_deleted_files--; + } + } - dev->gcBlock = 0; - dev->gcChunk = 0; + + chunks_after = yaffs_get_erased_chunks(dev); + if (chunks_before >= chunks_after) + yaffs_trace(YAFFS_TRACE_GC, + "gc did not increase free chunks before %d after %d", + chunks_before, chunks_after); + dev->gc_block = 0; + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - dev->gcDisable = 0; + dev->gc_disable = 0; - return retVal; + return ret_val; } /* @@ -3381,30 +2720,28 @@ static int yaffs_GarbageCollectBlock(yaffs_Device *dev, int block, * for garbage collection. */ -static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev, - int aggressive, - int background) +static unsigned yaffs_find_gc_block(struct yaffs_dev *dev, + int aggressive, int background) { int i; int iterations; unsigned selected = 0; int prioritised = 0; - int prioritisedExists = 0; - yaffs_BlockInfo *bi; + int prioritised_exist = 0; + struct yaffs_block_info *bi; int threshold; /* First let's see if we need to grab a prioritised block */ - if (dev->hasPendingPrioritisedGCs && !aggressive) { - dev->gcDirtiest = 0; - bi = dev->blockInfo; - for (i = dev->internalStartBlock; - i <= dev->internalEndBlock && !selected; - i++) { - - if (bi->gcPrioritise) { - prioritisedExists = 1; - if (bi->blockState == YAFFS_BLOCK_STATE_FULL && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { + if (dev->has_pending_prioritised_gc && !aggressive) { + dev->gc_dirtiest = 0; + bi = dev->block_info; + for (i = dev->internal_start_block; + i <= dev->internal_end_block && !selected; i++) { + + if (bi->gc_prioritise) { + prioritised_exist = 1; + if (bi->block_state == YAFFS_BLOCK_STATE_FULL && + yaffs_block_ok_for_gc(dev, bi)) { selected = i; prioritised = 1; } @@ -3418,13 +2755,12 @@ static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev, * up the works. Let's gc the oldest dirty block. */ - if(prioritisedExists && - !selected && - dev->oldestDirtyBlock > 0) - selected = dev->oldestDirtyBlock; + if (prioritised_exist && + !selected && dev->oldest_dirty_block > 0) + selected = dev->oldest_dirty_block; - if (!prioritisedExists) /* None found, so we can clear this */ - dev->hasPendingPrioritisedGCs = 0; + if (!prioritised_exist) /* None found, so we can clear this */ + dev->has_pending_prioritised_gc = 0; } /* If we're doing aggressive GC then we are happy to take a less-dirty block, and @@ -3433,51 +2769,61 @@ static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev, * block has only a few pages in use. */ - if (!selected){ - int pagesUsed; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - if (aggressive){ - threshold = dev->param.nChunksPerBlock; - iterations = nBlocks; + if (!selected) { + int pages_used; + int n_blocks = + dev->internal_end_block - dev->internal_start_block + 1; + if (aggressive) { + threshold = dev->param.chunks_per_block; + iterations = n_blocks; } else { - int maxThreshold = dev->param.nChunksPerBlock/2; - threshold = background ? - (dev->gcNotDone + 2) * 2 : 0; - if(threshold <YAFFS_GC_PASSIVE_THRESHOLD) + int max_threshold; + + if (background) + max_threshold = dev->param.chunks_per_block / 2; + else + max_threshold = dev->param.chunks_per_block / 8; + + if (max_threshold < YAFFS_GC_PASSIVE_THRESHOLD) + max_threshold = YAFFS_GC_PASSIVE_THRESHOLD; + + threshold = background ? (dev->gc_not_done + 2) * 2 : 0; + if (threshold < YAFFS_GC_PASSIVE_THRESHOLD) threshold = YAFFS_GC_PASSIVE_THRESHOLD; - if(threshold > maxThreshold) - threshold = maxThreshold; + if (threshold > max_threshold) + threshold = max_threshold; - iterations = nBlocks / 16 + 1; + iterations = n_blocks / 16 + 1; if (iterations > 100) iterations = 100; } for (i = 0; - i < iterations && - (dev->gcDirtiest < 1 || - dev->gcPagesInUse > YAFFS_GC_GOOD_ENOUGH); - i++) { - dev->gcBlockFinder++; - if (dev->gcBlockFinder < dev->internalStartBlock || - dev->gcBlockFinder > dev->internalEndBlock) - dev->gcBlockFinder = dev->internalStartBlock; - - bi = yaffs_GetBlockInfo(dev, dev->gcBlockFinder); - - pagesUsed = bi->pagesInUse - bi->softDeletions; - - if (bi->blockState == YAFFS_BLOCK_STATE_FULL && - pagesUsed < dev->param.nChunksPerBlock && - (dev->gcDirtiest < 1 || pagesUsed < dev->gcPagesInUse) && - yaffs_BlockNotDisqualifiedFromGC(dev, bi)) { - dev->gcDirtiest = dev->gcBlockFinder; - dev->gcPagesInUse = pagesUsed; + i < iterations && + (dev->gc_dirtiest < 1 || + dev->gc_pages_in_use > YAFFS_GC_GOOD_ENOUGH); i++) { + dev->gc_block_finder++; + if (dev->gc_block_finder < dev->internal_start_block || + dev->gc_block_finder > dev->internal_end_block) + dev->gc_block_finder = + dev->internal_start_block; + + bi = yaffs_get_block_info(dev, dev->gc_block_finder); + + pages_used = bi->pages_in_use - bi->soft_del_pages; + + if (bi->block_state == YAFFS_BLOCK_STATE_FULL && + pages_used < dev->param.chunks_per_block && + (dev->gc_dirtiest < 1 + || pages_used < dev->gc_pages_in_use) + && yaffs_block_ok_for_gc(dev, bi)) { + dev->gc_dirtiest = dev->gc_block_finder; + dev->gc_pages_in_use = pages_used; } } - if(dev->gcDirtiest > 0 && dev->gcPagesInUse <= threshold) - selected = dev->gcDirtiest; + if (dev->gc_dirtiest > 0 && dev->gc_pages_in_use <= threshold) + selected = dev->gc_dirtiest; } /* @@ -3485,42 +2831,44 @@ static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev, * because that's gumming up the works. */ - if(!selected && dev->param.isYaffs2 && - dev->gcNotDone >= ( background ? 10 : 20)){ - yaffs_FindOldestDirtySequence(dev); - if(dev->oldestDirtyBlock > 0) { - selected = dev->oldestDirtyBlock; - dev->gcDirtiest = selected; - dev->oldestDirtyGCs++; - bi = yaffs_GetBlockInfo(dev, selected); - dev->gcPagesInUse = bi->pagesInUse - bi->softDeletions; - } else - dev->gcNotDone = 0; - } - - if(selected){ - T(YAFFS_TRACE_GC, - (TSTR("GC Selected block %d with %d free, prioritised:%d" TENDSTR), - selected, - dev->param.nChunksPerBlock - dev->gcPagesInUse, - prioritised)); - - if(background) - dev->backgroundGCs++; - dev->gcDirtiest = 0; - dev->gcPagesInUse = 0; - dev->gcNotDone = 0; - if(dev->refreshSkip > 0) - dev->refreshSkip--; - } else{ - dev->gcNotDone++; - T(YAFFS_TRACE_GC, - (TSTR("GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s" TENDSTR), - dev->gcBlockFinder, dev->gcNotDone, - threshold, - dev->gcDirtiest, dev->gcPagesInUse, - dev->oldestDirtyBlock, - background ? " bg" : "")); + if (!selected && dev->param.is_yaffs2 && + dev->gc_not_done >= (background ? 10 : 20)) { + yaffs2_find_oldest_dirty_seq(dev); + if (dev->oldest_dirty_block > 0) { + selected = dev->oldest_dirty_block; + dev->gc_dirtiest = selected; + dev->oldest_dirty_gc_count++; + bi = yaffs_get_block_info(dev, selected); + dev->gc_pages_in_use = + bi->pages_in_use - bi->soft_del_pages; + } else { + dev->gc_not_done = 0; + } + } + + if (selected) { + yaffs_trace(YAFFS_TRACE_GC, + "GC Selected block %d with %d free, prioritised:%d", + selected, + dev->param.chunks_per_block - dev->gc_pages_in_use, + prioritised); + + dev->n_gc_blocks++; + if (background) + dev->bg_gcs++; + + dev->gc_dirtiest = 0; + dev->gc_pages_in_use = 0; + dev->gc_not_done = 0; + if (dev->refresh_skip > 0) + dev->refresh_skip--; + } else { + dev->gc_not_done++; + yaffs_trace(YAFFS_TRACE_GC, + "GC none: finder %d skip %d threshold %d dirtiest %d using %d oldest %d%s", + dev->gc_block_finder, dev->gc_not_done, threshold, + dev->gc_dirtiest, dev->gc_pages_in_use, + dev->oldest_dirty_block, background ? " bg" : ""); } return selected; @@ -3535,22 +2883,19 @@ static unsigned yaffs_FindBlockForGarbageCollection(yaffs_Device *dev, * The idea is to help clear out space in a more spread-out manner. * Dunno if it really does anything useful. */ -static int yaffs_CheckGarbageCollection(yaffs_Device *dev, int background) +static int yaffs_check_gc(struct yaffs_dev *dev, int background) { int aggressive = 0; - int gcOk = YAFFS_OK; - int maxTries = 0; - - int minErased; - int erasedChunks; - - int checkpointBlockAdjust; + int gc_ok = YAFFS_OK; + int max_tries = 0; + int min_erased; + int erased_chunks; + int checkpt_block_adjust; - if(dev->param.gcControl && - (dev->param.gcControl(dev) & 1) == 0) + if (dev->param.gc_control && (dev->param.gc_control(dev) & 1) == 0) return YAFFS_OK; - if (dev->gcDisable) { + if (dev->gc_disable) { /* Bail out so we don't get recursive gc */ return YAFFS_OK; } @@ -3560,1473 +2905,627 @@ static int yaffs_CheckGarbageCollection(yaffs_Device *dev, int background) */ do { - maxTries++; + max_tries++; - checkpointBlockAdjust = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint; - if (checkpointBlockAdjust < 0) - checkpointBlockAdjust = 0; + checkpt_block_adjust = yaffs_calc_checkpt_blocks_required(dev); - minErased = dev->param.nReservedBlocks + checkpointBlockAdjust + 1; - erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock; + min_erased = + dev->param.n_reserved_blocks + checkpt_block_adjust + 1; + erased_chunks = + dev->n_erased_blocks * dev->param.chunks_per_block; - /* If we need a block soon then do aggressive gc.*/ - if (dev->nErasedBlocks < minErased) + /* If we need a block soon then do aggressive gc. */ + if (dev->n_erased_blocks < min_erased) aggressive = 1; else { - if(dev->gcSkip > 20) - dev->gcSkip = 20; - if(erasedChunks < dev->nFreeChunks/2 || - dev->gcSkip < 1 || - background) + if (!background + && erased_chunks > (dev->n_free_chunks / 4)) + break; + + if (dev->gc_skip > 20) + dev->gc_skip = 20; + if (erased_chunks < dev->n_free_chunks / 2 || + dev->gc_skip < 1 || background) aggressive = 0; else { - dev->gcSkip--; + dev->gc_skip--; break; } } - dev->gcSkip = 5; + dev->gc_skip = 5; - /* If we don't already have a block being gc'd then see if we should start another */ + /* If we don't already have a block being gc'd then see if we should start another */ - if (dev->gcBlock < 1 && !aggressive) { - dev->gcBlock = yaffs_FindRefreshBlock(dev); - dev->gcChunk = 0; + if (dev->gc_block < 1 && !aggressive) { + dev->gc_block = yaffs2_find_refresh_block(dev); + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - if (dev->gcBlock < 1) { - dev->gcBlock = yaffs_FindBlockForGarbageCollection(dev, aggressive, background); - dev->gcChunk = 0; + if (dev->gc_block < 1) { + dev->gc_block = + yaffs_find_gc_block(dev, aggressive, background); + dev->gc_chunk = 0; + dev->n_clean_ups = 0; } - if (dev->gcBlock > 0) { - dev->allGCs++; + if (dev->gc_block > 0) { + dev->all_gcs++; if (!aggressive) - dev->passiveGCs++; + dev->passive_gc_count++; - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC erasedBlocks %d aggressive %d" TENDSTR), - dev->nErasedBlocks, aggressive)); + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC n_erased_blocks %d aggressive %d", + dev->n_erased_blocks, aggressive); - gcOk = yaffs_GarbageCollectBlock(dev, dev->gcBlock, aggressive); + gc_ok = yaffs_gc_block(dev, dev->gc_block, aggressive); } - if (dev->nErasedBlocks < (dev->param.nReservedBlocks) && dev->gcBlock > 0) { - T(YAFFS_TRACE_GC, - (TSTR - ("yaffs: GC !!!no reclaim!!! erasedBlocks %d after try %d block %d" - TENDSTR), dev->nErasedBlocks, maxTries, dev->gcBlock)); + if (dev->n_erased_blocks < (dev->param.n_reserved_blocks) + && dev->gc_block > 0) { + yaffs_trace(YAFFS_TRACE_GC, + "yaffs: GC !!!no reclaim!!! n_erased_blocks %d after try %d block %d", + dev->n_erased_blocks, max_tries, + dev->gc_block); } - } while ((dev->nErasedBlocks < dev->param.nReservedBlocks) && - (dev->gcBlock > 0) && - (maxTries < 2)); + } while ((dev->n_erased_blocks < dev->param.n_reserved_blocks) && + (dev->gc_block > 0) && (max_tries < 2)); - return aggressive ? gcOk : YAFFS_OK; + return aggressive ? gc_ok : YAFFS_OK; } /* - * yaffs_BackgroundGarbageCollect() + * yaffs_bg_gc() * Garbage collects. Intended to be called from a background thread. * Returns non-zero if at least half the free chunks are erased. */ -int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency) +int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency) { - int erasedChunks = dev->nErasedBlocks * dev->param.nChunksPerBlock; - - T(YAFFS_TRACE_BACKGROUND, (TSTR("Background gc %u" TENDSTR),urgency)); - - yaffs_CheckGarbageCollection(dev, 1); - return erasedChunks > dev->nFreeChunks/2; -} + int erased_chunks = dev->n_erased_blocks * dev->param.chunks_per_block; -/*------------------------- TAGS --------------------------------*/ - -static int yaffs_TagsMatch(const yaffs_ExtendedTags *tags, int objectId, - int chunkInObject) -{ - return (tags->chunkId == chunkInObject && - tags->objectId == objectId && !tags->chunkDeleted) ? 1 : 0; + yaffs_trace(YAFFS_TRACE_BACKGROUND, "Background gc %u", urgency); + yaffs_check_gc(dev, 1); + return erased_chunks > dev->n_free_chunks / 2; } - /*-------------------- Data file manipulation -----------------*/ -static int yaffs_FindChunkInFile(yaffs_Object *in, int chunkInInode, - yaffs_ExtendedTags *tags) +static int yaffs_rd_data_obj(struct yaffs_obj *in, int inode_chunk, u8 * buffer) { - /*Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; - int retVal = -1; - - yaffs_Device *dev = in->myDev; + int nand_chunk = yaffs_find_chunk_in_file(in, inode_chunk, NULL); - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } - - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); - - if (tn) { - theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode); - - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); - } - return retVal; -} - -static int yaffs_FindAndDeleteChunkInFile(yaffs_Object *in, int chunkInInode, - yaffs_ExtendedTags *tags) -{ - /* Get the Tnode, then get the level 0 offset chunk offset */ - yaffs_Tnode *tn; - int theChunk = -1; - yaffs_ExtendedTags localTags; - - yaffs_Device *dev = in->myDev; - int retVal = -1; - - if (!tags) { - /* Passed a NULL, so use our own tags space */ - tags = &localTags; - } - - tn = yaffs_FindLevel0Tnode(dev, &in->variant.fileVariant, chunkInInode); - - if (tn) { - - theChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode); - - retVal = - yaffs_FindChunkInGroup(dev, theChunk, tags, in->objectId, - chunkInInode); - - /* Delete the entry in the filestructure (if found) */ - if (retVal != -1) - yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, 0); - } - - return retVal; -} - -#ifdef YAFFS_PARANOID - -static int yaffs_CheckFileSanity(yaffs_Object *in) -{ - int chunk; - int nChunks; - int fSize; - int failed = 0; - int objId; - yaffs_Tnode *tn; - yaffs_Tags localTags; - yaffs_Tags *tags = &localTags; - int theChunk; - int chunkDeleted; - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) - return YAFFS_FAIL; - - objId = in->objectId; - fSize = in->variant.fileVariant.fileSize; - nChunks = - (fSize + in->myDev->nDataBytesPerChunk - 1) / in->myDev->nDataBytesPerChunk; - - for (chunk = 1; chunk <= nChunks; chunk++) { - tn = yaffs_FindLevel0Tnode(in->myDev, &in->variant.fileVariant, - chunk); - - if (tn) { - - theChunk = yaffs_GetChunkGroupBase(dev, tn, chunk); - - if (yaffs_CheckChunkBits - (dev, theChunk / dev->param.nChunksPerBlock, - theChunk % dev->param.nChunksPerBlock)) { - - yaffs_ReadChunkTagsFromNAND(in->myDev, theChunk, - tags, - &chunkDeleted); - if (yaffs_TagsMatch - (tags, in->objectId, chunk, chunkDeleted)) { - /* found it; */ - - } - } else { - - failed = 1; - } - - } else { - /* T(("No level 0 found for %d\n", chunk)); */ - } - } - - return failed ? YAFFS_FAIL : YAFFS_OK; -} - -#endif - -static int yaffs_PutChunkIntoFile(yaffs_Object *in, int chunkInInode, - int chunkInNAND, int inScan) -{ - /* NB inScan is zero unless scanning. - * For forward scanning, inScan is > 0; - * for backward scanning inScan is < 0 - * - * chunkInNAND = 0 is a dummy insert to make sure the tnodes are there. - */ - - yaffs_Tnode *tn; - yaffs_Device *dev = in->myDev; - int existingChunk; - yaffs_ExtendedTags existingTags; - yaffs_ExtendedTags newTags; - unsigned existingSerial, newSerial; - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) { - /* Just ignore an attempt at putting a chunk into a non-file during scanning - * If it is not during Scanning then something went wrong! - */ - if (!inScan) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy:attempt to put data chunk into a non-file" - TENDSTR))); - YBUG(); - } - - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); - return YAFFS_OK; - } - - tn = yaffs_AddOrFindLevel0Tnode(dev, - &in->variant.fileVariant, - chunkInInode, - NULL); - if (!tn) - return YAFFS_FAIL; - - if(!chunkInNAND) - /* Dummy insert, bail now */ - return YAFFS_OK; - - existingChunk = yaffs_GetChunkGroupBase(dev, tn, chunkInInode); - - if (inScan != 0) { - /* If we're scanning then we need to test for duplicates - * NB This does not need to be efficient since it should only ever - * happen when the power fails during a write, then only one - * chunk should ever be affected. - * - * Correction for YAFFS2: This could happen quite a lot and we need to think about efficiency! TODO - * Update: For backward scanning we don't need to re-read tags so this is quite cheap. - */ - - if (existingChunk > 0) { - /* NB Right now existing chunk will not be real chunkId if the device >= 32MB - * thus we have to do a FindChunkInFile to get the real chunk id. - * - * We have a duplicate now we need to decide which one to use: - * - * Backwards scanning YAFFS2: The old one is what we use, dump the new one. - * Forward scanning YAFFS2: The new one is what we use, dump the old one. - * YAFFS1: Get both sets of tags and compare serial numbers. - */ - - if (inScan > 0) { - /* Only do this for forward scanning */ - yaffs_ReadChunkWithTagsFromNAND(dev, - chunkInNAND, - NULL, &newTags); - - /* Do a proper find */ - existingChunk = - yaffs_FindChunkInFile(in, chunkInInode, - &existingTags); - } - - if (existingChunk <= 0) { - /*Hoosterman - how did this happen? */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: existing chunk < 0 in scan" - TENDSTR))); - - } - - /* NB The deleted flags should be false, otherwise the chunks will - * not be loaded during a scan - */ - - if (inScan > 0) { - newSerial = newTags.serialNumber; - existingSerial = existingTags.serialNumber; - } - - if ((inScan > 0) && - (in->myDev->param.isYaffs2 || - existingChunk <= 0 || - ((existingSerial + 1) & 3) == newSerial)) { - /* Forward scanning. - * Use new - * Delete the old one and drop through to update the tnode - */ - yaffs_DeleteChunk(dev, existingChunk, 1, - __LINE__); - } else { - /* Backward scanning or we want to use the existing one - * Use existing. - * Delete the new one and return early so that the tnode isn't changed - */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, - __LINE__); - return YAFFS_OK; - } - } - - } - - if (existingChunk == 0) - in->nDataChunks++; - - yaffs_LoadLevel0Tnode(dev, tn, chunkInInode, chunkInNAND); - - return YAFFS_OK; -} - -static int yaffs_ReadChunkDataFromObject(yaffs_Object *in, int chunkInInode, - __u8 *buffer) -{ - int chunkInNAND = yaffs_FindChunkInFile(in, chunkInInode, NULL); - - if (chunkInNAND >= 0) - return yaffs_ReadChunkWithTagsFromNAND(in->myDev, chunkInNAND, + if (nand_chunk >= 0) + return yaffs_rd_chunk_tags_nand(in->my_dev, nand_chunk, buffer, NULL); else { - T(YAFFS_TRACE_NANDACCESS, - (TSTR("Chunk %d not found zero instead" TENDSTR), - chunkInNAND)); + yaffs_trace(YAFFS_TRACE_NANDACCESS, + "Chunk %d not found zero instead", + nand_chunk); /* get sane (zero) data if you read a hole */ - memset(buffer, 0, in->myDev->nDataBytesPerChunk); + memset(buffer, 0, in->my_dev->data_bytes_per_chunk); return 0; } } -void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn) +void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, + int lyn) { int block; int page; - yaffs_ExtendedTags tags; - yaffs_BlockInfo *bi; + struct yaffs_ext_tags tags; + struct yaffs_block_info *bi; - if (chunkId <= 0) + if (chunk_id <= 0) return; - dev->nDeletions++; - block = chunkId / dev->param.nChunksPerBlock; - page = chunkId % dev->param.nChunksPerBlock; + dev->n_deletions++; + block = chunk_id / dev->param.chunks_per_block; + page = chunk_id % dev->param.chunks_per_block; + if (!yaffs_check_chunk_bit(dev, block, page)) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Deleting invalid chunk %d", chunk_id); - if (!yaffs_CheckChunkBit(dev, block, page)) - T(YAFFS_TRACE_VERIFY, - (TSTR("Deleting invalid chunk %d"TENDSTR), - chunkId)); + bi = yaffs_get_block_info(dev, block); - bi = yaffs_GetBlockInfo(dev, block); - - yaffs_UpdateOldestDirtySequence(dev, block, bi); + yaffs2_update_oldest_dirty_seq(dev, block, bi); - T(YAFFS_TRACE_DELETION, - (TSTR("line %d delete of chunk %d" TENDSTR), lyn, chunkId)); + yaffs_trace(YAFFS_TRACE_DELETION, + "line %d delete of chunk %d", + lyn, chunk_id); - if (markNAND && - bi->blockState != YAFFS_BLOCK_STATE_COLLECTING && !dev->param.isYaffs2) { + if (!dev->param.is_yaffs2 && mark_flash && + bi->block_state != YAFFS_BLOCK_STATE_COLLECTING) { - yaffs_InitialiseTags(&tags); + yaffs_init_tags(&tags); - tags.chunkDeleted = 1; + tags.is_deleted = 1; - yaffs_WriteChunkWithTagsToNAND(dev, chunkId, NULL, &tags); - yaffs_HandleUpdateChunk(dev, chunkId, &tags); + yaffs_wr_chunk_tags_nand(dev, chunk_id, NULL, &tags); + yaffs_handle_chunk_update(dev, chunk_id, &tags); } else { - dev->nUnmarkedDeletions++; + dev->n_unmarked_deletions++; } /* Pull out of the management area. * If the whole block became dirty, this will kick off an erasure. */ - if (bi->blockState == YAFFS_BLOCK_STATE_ALLOCATING || - bi->blockState == YAFFS_BLOCK_STATE_FULL || - bi->blockState == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - bi->blockState == YAFFS_BLOCK_STATE_COLLECTING) { - dev->nFreeChunks++; + if (bi->block_state == YAFFS_BLOCK_STATE_ALLOCATING || + bi->block_state == YAFFS_BLOCK_STATE_FULL || + bi->block_state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || + bi->block_state == YAFFS_BLOCK_STATE_COLLECTING) { + dev->n_free_chunks++; - yaffs_ClearChunkBit(dev, block, page); + yaffs_clear_chunk_bit(dev, block, page); - bi->pagesInUse--; + bi->pages_in_use--; - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState != YAFFS_BLOCK_STATE_ALLOCATING && - bi->blockState != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - yaffs_BlockBecameDirty(dev, block); + if (bi->pages_in_use == 0 && + !bi->has_shrink_hdr && + bi->block_state != YAFFS_BLOCK_STATE_ALLOCATING && + bi->block_state != YAFFS_BLOCK_STATE_NEEDS_SCANNING) { + yaffs_block_became_dirty(dev, block); } } } -static int yaffs_WriteChunkDataToObject(yaffs_Object *in, int chunkInInode, - const __u8 *buffer, int nBytes, - int useReserve) +static int yaffs_wr_data_obj(struct yaffs_obj *in, int inode_chunk, + const u8 * buffer, int n_bytes, int use_reserve) { /* Find old chunk Need to do this to get serial number * Write new one and patch into tree. * Invalidate old tags. */ - int prevChunkId; - yaffs_ExtendedTags prevTags; + int prev_chunk_id; + struct yaffs_ext_tags prev_tags; - int newChunkId; - yaffs_ExtendedTags newTags; + int new_chunk_id; + struct yaffs_ext_tags new_tags; - yaffs_Device *dev = in->myDev; + struct yaffs_dev *dev = in->my_dev; - yaffs_CheckGarbageCollection(dev,0); + yaffs_check_gc(dev, 0); /* Get the previous chunk at this location in the file if it exists. * If it does not exist then put a zero into the tree. This creates * the tnode now, rather than later when it is harder to clean up. */ - prevChunkId = yaffs_FindChunkInFile(in, chunkInInode, &prevTags); - if(prevChunkId < 1 && - !yaffs_PutChunkIntoFile(in, chunkInInode, 0, 0)) + prev_chunk_id = yaffs_find_chunk_in_file(in, inode_chunk, &prev_tags); + if (prev_chunk_id < 1 && + !yaffs_put_chunk_in_file(in, inode_chunk, 0, 0)) return 0; /* Set up new tags */ - yaffs_InitialiseTags(&newTags); - - newTags.chunkId = chunkInInode; - newTags.objectId = in->objectId; - newTags.serialNumber = - (prevChunkId > 0) ? prevTags.serialNumber + 1 : 1; - newTags.byteCount = nBytes; - - if (nBytes < 1 || nBytes > dev->param.totalBytesPerChunk) { - T(YAFFS_TRACE_ERROR, - (TSTR("Writing %d bytes to chunk!!!!!!!!!" TENDSTR), nBytes)); + yaffs_init_tags(&new_tags); + + new_tags.chunk_id = inode_chunk; + new_tags.obj_id = in->obj_id; + new_tags.serial_number = + (prev_chunk_id > 0) ? prev_tags.serial_number + 1 : 1; + new_tags.n_bytes = n_bytes; + + if (n_bytes < 1 || n_bytes > dev->param.total_bytes_per_chunk) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Writing %d bytes to chunk!!!!!!!!!", + n_bytes); YBUG(); } - - - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - useReserve); - if (newChunkId > 0) { - yaffs_PutChunkIntoFile(in, chunkInInode, newChunkId, 0); + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, use_reserve); - if (prevChunkId > 0) - yaffs_DeleteChunk(dev, prevChunkId, 1, __LINE__); - - yaffs_CheckFileSanity(in); - } - return newChunkId; - -} - -/* UpdateObjectHeader updates the header on NAND for an object. - * If name is not NULL, then that new name is used. - */ -int yaffs_UpdateObjectHeader(yaffs_Object *in, const YCHAR *name, int force, - int isShrink, int shadows) -{ + if (new_chunk_id > 0) { + yaffs_put_chunk_in_file(in, inode_chunk, new_chunk_id, 0); - yaffs_BlockInfo *bi; - - yaffs_Device *dev = in->myDev; - - int prevChunkId; - int retVal = 0; - int result = 0; - - int newChunkId; - yaffs_ExtendedTags newTags; - yaffs_ExtendedTags oldTags; - YCHAR *alias = NULL; - - __u8 *buffer = NULL; - YCHAR oldName[YAFFS_MAX_NAME_LENGTH + 1]; - - yaffs_ObjectHeader *oh = NULL; - - yaffs_strcpy(oldName, _Y("silly old name")); - - - if (!in->fake || - in == dev->rootDir || /* The rootDir should also be saved */ - force) { - - yaffs_CheckGarbageCollection(dev,0); - yaffs_CheckObjectDetailsLoaded(in); - - buffer = yaffs_GetTempBuffer(in->myDev, __LINE__); - oh = (yaffs_ObjectHeader *) buffer; - - prevChunkId = in->hdrChunk; - - if (prevChunkId > 0) { - result = yaffs_ReadChunkWithTagsFromNAND(dev, prevChunkId, - buffer, &oldTags); - - yaffs_VerifyObjectHeader(in, oh, &oldTags, 0); - - memcpy(oldName, oh->name, sizeof(oh->name)); - } - - memset(buffer, 0xFF, dev->nDataBytesPerChunk); - - oh->type = in->variantType; - oh->yst_mode = in->yst_mode; - oh->shadowsObject = oh->inbandShadowsObject = shadows; - -#ifdef CONFIG_YAFFS_WINCE - oh->win_atime[0] = in->win_atime[0]; - oh->win_ctime[0] = in->win_ctime[0]; - oh->win_mtime[0] = in->win_mtime[0]; - oh->win_atime[1] = in->win_atime[1]; - oh->win_ctime[1] = in->win_ctime[1]; - oh->win_mtime[1] = in->win_mtime[1]; -#else - oh->yst_uid = in->yst_uid; - oh->yst_gid = in->yst_gid; - oh->yst_atime = in->yst_atime; - oh->yst_mtime = in->yst_mtime; - oh->yst_ctime = in->yst_ctime; - oh->yst_rdev = in->yst_rdev; -#endif - if (in->parent) - oh->parentObjectId = in->parent->objectId; - else - oh->parentObjectId = 0; - - if (name && *name) { - memset(oh->name, 0, sizeof(oh->name)); - yaffs_strncpy(oh->name, name, YAFFS_MAX_NAME_LENGTH); - } else if (prevChunkId > 0) - memcpy(oh->name, oldName, sizeof(oh->name)); - else - memset(oh->name, 0, sizeof(oh->name)); - - oh->isShrink = isShrink; - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Should not happen */ - break; - case YAFFS_OBJECT_TYPE_FILE: - oh->fileSize = - (oh->parentObjectId == YAFFS_OBJECTID_DELETED - || oh->parentObjectId == - YAFFS_OBJECTID_UNLINKED) ? 0 : in->variant. - fileVariant.fileSize; - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - oh->equivalentObjectId = - in->variant.hardLinkVariant.equivalentObjectId; - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - alias = in->variant.symLinkVariant.alias; - if(!alias) - alias = _Y("no alias"); - yaffs_strncpy(oh->alias, - alias, - YAFFS_MAX_ALIAS_LENGTH); - oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; - break; - } - - /* Tags */ - yaffs_InitialiseTags(&newTags); - in->serial++; - newTags.chunkId = 0; - newTags.objectId = in->objectId; - newTags.serialNumber = in->serial; - - /* Add extra info for file header */ - - newTags.extraHeaderInfoAvailable = 1; - newTags.extraParentObjectId = oh->parentObjectId; - newTags.extraFileLength = oh->fileSize; - newTags.extraIsShrinkHeader = oh->isShrink; - newTags.extraEquivalentObjectId = oh->equivalentObjectId; - newTags.extraShadows = (oh->shadowsObject > 0) ? 1 : 0; - newTags.extraObjectType = in->variantType; - - yaffs_VerifyObjectHeader(in, oh, &newTags, 1); - - /* Create new chunk in NAND */ - newChunkId = - yaffs_WriteNewChunkWithTagsToNAND(dev, buffer, &newTags, - (prevChunkId > 0) ? 1 : 0); - - if (newChunkId >= 0) { - - in->hdrChunk = newChunkId; - - if (prevChunkId > 0) { - yaffs_DeleteChunk(dev, prevChunkId, 1, - __LINE__); - } - - if (!yaffs_ObjectHasCachedWriteData(in)) - in->dirty = 0; - - /* If this was a shrink, then mark the block that the chunk lives on */ - if (isShrink) { - bi = yaffs_GetBlockInfo(in->myDev, - newChunkId / in->myDev->param.nChunksPerBlock); - bi->hasShrinkHeader = 1; - } - - } - - retVal = newChunkId; + if (prev_chunk_id > 0) + yaffs_chunk_del(dev, prev_chunk_id, 1, __LINE__); + yaffs_verify_file_sane(in); } + return new_chunk_id; - if (buffer) - yaffs_ReleaseTempBuffer(dev, buffer, __LINE__); - - return retVal; } -/*------------------------ Short Operations Cache ---------------------------------------- - * In many situations where there is no high level buffering (eg WinCE) a lot of - * reads might be short sequential reads, and a lot of writes may be short - * sequential writes. eg. scanning/writing a jpeg file. - * In these cases, a short read/write cache can provide a huge perfomance benefit - * with dumb-as-a-rock code. - * In Linux, the page cache provides read buffering aand the short op cache provides write - * buffering. - * - * There are a limited number (~10) of cache chunks per device so that we don't - * need a very intelligent search. - */ - -static int yaffs_ObjectHasCachedWriteData(yaffs_Object *obj) -{ - yaffs_Device *dev = obj->myDev; - int i; - yaffs_ChunkCache *cache; - int nCaches = obj->myDev->param.nShortOpCaches; - for (i = 0; i < nCaches; i++) { - cache = &dev->srCache[i]; - if (cache->object == obj && - cache->dirty) - return 1; - } - return 0; -} - - -static void yaffs_FlushFilesChunkCache(yaffs_Object *obj) +static int yaffs_do_xattrib_mod(struct yaffs_obj *obj, int set, + const YCHAR * name, const void *value, int size, + int flags) { - yaffs_Device *dev = obj->myDev; - int lowest = -99; /* Stop compiler whining. */ - int i; - yaffs_ChunkCache *cache; - int chunkWritten = 0; - int nCaches = obj->myDev->param.nShortOpCaches; + struct yaffs_xattr_mod xmod; - if (nCaches > 0) { - do { - cache = NULL; - - /* Find the dirty cache for this object with the lowest chunk id. */ - for (i = 0; i < nCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].dirty) { - if (!cache - || dev->srCache[i].chunkId < - lowest) { - cache = &dev->srCache[i]; - lowest = cache->chunkId; - } - } - } - - if (cache && !cache->locked) { - /* Write it out and free it up */ - - chunkWritten = - yaffs_WriteChunkDataToObject(cache->object, - cache->chunkId, - cache->data, - cache->nBytes, - 1); - cache->dirty = 0; - cache->object = NULL; - } + int result; - } while (cache && chunkWritten > 0); + xmod.set = set; + xmod.name = name; + xmod.data = value; + xmod.size = size; + xmod.flags = flags; + xmod.result = -ENOSPC; - if (cache) { - /* Hoosterman, disk full while writing cache out. */ - T(YAFFS_TRACE_ERROR, - (TSTR("yaffs tragedy: no space during cache write" TENDSTR))); - - } - } + result = yaffs_update_oh(obj, NULL, 0, 0, 0, &xmod); + if (result > 0) + return xmod.result; + else + return -ENOSPC; } -/*yaffs_FlushEntireDeviceCache(dev) - * - * - */ - -void yaffs_FlushEntireDeviceCache(yaffs_Device *dev) +static int yaffs_apply_xattrib_mod(struct yaffs_obj *obj, char *buffer, + struct yaffs_xattr_mod *xmod) { - yaffs_Object *obj; - int nCaches = dev->param.nShortOpCaches; - int i; + int retval = 0; + int x_offs = sizeof(struct yaffs_obj_hdr); + struct yaffs_dev *dev = obj->my_dev; + int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); - /* Find a dirty object in the cache and flush it... - * until there are no further dirty objects. - */ - do { - obj = NULL; - for (i = 0; i < nCaches && !obj; i++) { - if (dev->srCache[i].object && - dev->srCache[i].dirty) - obj = dev->srCache[i].object; + char *x_buffer = buffer + x_offs; - } - if (obj) - yaffs_FlushFilesChunkCache(obj); - - } while (obj); + if (xmod->set) + retval = + nval_set(x_buffer, x_size, xmod->name, xmod->data, + xmod->size, xmod->flags); + else + retval = nval_del(x_buffer, x_size, xmod->name); -} + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; + xmod->result = retval; -/* Grab us a cache chunk for use. - * First look for an empty one. - * Then look for the least recently used non-dirty one. - * Then look for the least recently used dirty one...., flush and look again. - */ -static yaffs_ChunkCache *yaffs_GrabChunkCacheWorker(yaffs_Device *dev) -{ - int i; - - if (dev->param.nShortOpCaches > 0) { - for (i = 0; i < dev->param.nShortOpCaches; i++) { - if (!dev->srCache[i].object) - return &dev->srCache[i]; - } - } - - return NULL; + return retval; } -static yaffs_ChunkCache *yaffs_GrabChunkCache(yaffs_Device *dev) +static int yaffs_do_xattrib_fetch(struct yaffs_obj *obj, const YCHAR * name, + void *value, int size) { - yaffs_ChunkCache *cache; - yaffs_Object *theObj; - int usage; - int i; - int pushout; - - if (dev->param.nShortOpCaches > 0) { - /* Try find a non-dirty one... */ - - cache = yaffs_GrabChunkCacheWorker(dev); - - if (!cache) { - /* They were all dirty, find the last recently used object and flush - * its cache, then find again. - * NB what's here is not very accurate, we actually flush the object - * the last recently used page. - */ + char *buffer = NULL; + int result; + struct yaffs_ext_tags tags; + struct yaffs_dev *dev = obj->my_dev; + int x_offs = sizeof(struct yaffs_obj_hdr); + int x_size = dev->data_bytes_per_chunk - sizeof(struct yaffs_obj_hdr); - /* With locking we can't assume we can use entry zero */ + char *x_buffer; - theObj = NULL; - usage = -1; - cache = NULL; - pushout = -1; + int retval = 0; - for (i = 0; i < dev->param.nShortOpCaches; i++) { - if (dev->srCache[i].object && - !dev->srCache[i].locked && - (dev->srCache[i].lastUse < usage || !cache)) { - usage = dev->srCache[i].lastUse; - theObj = dev->srCache[i].object; - cache = &dev->srCache[i]; - pushout = i; - } - } + if (obj->hdr_chunk < 1) + return -ENODATA; - if (!cache || cache->dirty) { - /* Flush and try again */ - yaffs_FlushFilesChunkCache(theObj); - cache = yaffs_GrabChunkCacheWorker(dev); - } - - } - return cache; - } else - return NULL; - -} - -/* Find a cached chunk */ -static yaffs_ChunkCache *yaffs_FindChunkCache(const yaffs_Object *obj, - int chunkId) -{ - yaffs_Device *dev = obj->myDev; - int i; - if (dev->param.nShortOpCaches > 0) { - for (i = 0; i < dev->param.nShortOpCaches; i++) { - if (dev->srCache[i].object == obj && - dev->srCache[i].chunkId == chunkId) { - dev->cacheHits++; - - return &dev->srCache[i]; - } - } + /* If we know that the object has no xattribs then don't do all the + * reading and parsing. + */ + if (obj->xattr_known && !obj->has_xattr) { + if (name) + return -ENODATA; + else + return 0; } - return NULL; -} -/* Mark the chunk for the least recently used algorithym */ -static void yaffs_UseChunkCache(yaffs_Device *dev, yaffs_ChunkCache *cache, - int isAWrite) -{ + buffer = (char *)yaffs_get_temp_buffer(dev, __LINE__); + if (!buffer) + return -ENOMEM; - if (dev->param.nShortOpCaches > 0) { - if (dev->srLastUse < 0 || dev->srLastUse > 100000000) { - /* Reset the cache usages */ - int i; - for (i = 1; i < dev->param.nShortOpCaches; i++) - dev->srCache[i].lastUse = 0; + result = + yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, (u8 *) buffer, &tags); - dev->srLastUse = 0; - } - - dev->srLastUse++; - - cache->lastUse = dev->srLastUse; - - if (isAWrite) - cache->dirty = 1; - } -} + if (result != YAFFS_OK) + retval = -ENOENT; + else { + x_buffer = buffer + x_offs; -/* Invalidate a single cache page. - * Do this when a whole page gets written, - * ie the short cache for this page is no longer valid. - */ -static void yaffs_InvalidateChunkCache(yaffs_Object *object, int chunkId) -{ - if (object->myDev->param.nShortOpCaches > 0) { - yaffs_ChunkCache *cache = yaffs_FindChunkCache(object, chunkId); + if (!obj->xattr_known) { + obj->has_xattr = nval_hasvalues(x_buffer, x_size); + obj->xattr_known = 1; + } - if (cache) - cache->object = NULL; + if (name) + retval = nval_get(x_buffer, x_size, name, value, size); + else + retval = nval_list(x_buffer, x_size, value, size); } + yaffs_release_temp_buffer(dev, (u8 *) buffer, __LINE__); + return retval; } -/* Invalidate all the cache pages associated with this object - * Do this whenever ther file is deleted or resized. - */ -static void yaffs_InvalidateWholeChunkCache(yaffs_Object *in) +int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, + const void *value, int size, int flags) { - int i; - yaffs_Device *dev = in->myDev; - - if (dev->param.nShortOpCaches > 0) { - /* Invalidate it. */ - for (i = 0; i < dev->param.nShortOpCaches; i++) { - if (dev->srCache[i].object == in) - dev->srCache[i].object = NULL; - } - } + return yaffs_do_xattrib_mod(obj, 1, name, value, size, flags); } -/*--------------------- Checkpointing --------------------*/ - - -static int yaffs_WriteCheckpointValidityMarker(yaffs_Device *dev, int head) +int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name) { - yaffs_CheckpointValidity cp; - - memset(&cp, 0, sizeof(cp)); - - cp.structType = sizeof(cp); - cp.magic = YAFFS_MAGIC; - cp.version = YAFFS_CHECKPOINT_VERSION; - cp.head = (head) ? 1 : 0; - - return (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)) ? - 1 : 0; + return yaffs_do_xattrib_mod(obj, 0, name, NULL, 0, 0); } -static int yaffs_ReadCheckpointValidityMarker(yaffs_Device *dev, int head) +int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, + int size) { - yaffs_CheckpointValidity cp; - int ok; - - ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp)); - - if (ok) - ok = (cp.structType == sizeof(cp)) && - (cp.magic == YAFFS_MAGIC) && - (cp.version == YAFFS_CHECKPOINT_VERSION) && - (cp.head == ((head) ? 1 : 0)); - return ok ? 1 : 0; + return yaffs_do_xattrib_fetch(obj, name, value, size); } -static void yaffs_DeviceToCheckpointDevice(yaffs_CheckpointDevice *cp, - yaffs_Device *dev) +int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size) { - cp->nErasedBlocks = dev->nErasedBlocks; - cp->allocationBlock = dev->allocationBlock; - cp->allocationPage = dev->allocationPage; - cp->nFreeChunks = dev->nFreeChunks; - - cp->nDeletedFiles = dev->nDeletedFiles; - cp->nUnlinkedFiles = dev->nUnlinkedFiles; - cp->nBackgroundDeletions = dev->nBackgroundDeletions; - cp->sequenceNumber = dev->sequenceNumber; - + return yaffs_do_xattrib_fetch(obj, NULL, buffer, size); } -static void yaffs_CheckpointDeviceToDevice(yaffs_Device *dev, - yaffs_CheckpointDevice *cp) +static void yaffs_check_obj_details_loaded(struct yaffs_obj *in) { - dev->nErasedBlocks = cp->nErasedBlocks; - dev->allocationBlock = cp->allocationBlock; - dev->allocationPage = cp->allocationPage; - dev->nFreeChunks = cp->nFreeChunks; - - dev->nDeletedFiles = cp->nDeletedFiles; - dev->nUnlinkedFiles = cp->nUnlinkedFiles; - dev->nBackgroundDeletions = cp->nBackgroundDeletions; - dev->sequenceNumber = cp->sequenceNumber; -} - + u8 *chunk_data; + struct yaffs_obj_hdr *oh; + struct yaffs_dev *dev; + struct yaffs_ext_tags tags; + int result; + int alloc_failed = 0; -static int yaffs_WriteCheckpointDevice(yaffs_Device *dev) -{ - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); + if (!in) + return; - int ok; + dev = in->my_dev; - /* Write device runtime values*/ - yaffs_DeviceToCheckpointDevice(&cp, dev); - cp.structType = sizeof(cp); + if (in->lazy_loaded && in->hdr_chunk > 0) { + in->lazy_loaded = 0; + chunk_data = yaffs_get_temp_buffer(dev, __LINE__); - ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)); + result = + yaffs_rd_chunk_tags_nand(dev, in->hdr_chunk, chunk_data, + &tags); + oh = (struct yaffs_obj_hdr *)chunk_data; - /* Write block info */ - if (ok) { - nBytes = nBlocks * sizeof(yaffs_BlockInfo); - ok = (yaffs_CheckpointWrite(dev, dev->blockInfo, nBytes) == nBytes); - } + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + yaffs_set_obj_name_from_oh(in, oh); + + if (in->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { + in->variant.symlink_variant.alias = + yaffs_clone_str(oh->alias); + if (!in->variant.symlink_variant.alias) + alloc_failed = 1; /* Not returned to caller */ + } - /* Write chunk bits */ - if (ok) { - nBytes = nBlocks * dev->chunkBitmapStride; - ok = (yaffs_CheckpointWrite(dev, dev->chunkBits, nBytes) == nBytes); + yaffs_release_temp_buffer(dev, chunk_data, __LINE__); } - return ok ? 1 : 0; - } -static int yaffs_ReadCheckpointDevice(yaffs_Device *dev) +static void yaffs_load_name_from_oh(struct yaffs_dev *dev, YCHAR * name, + const YCHAR * oh_name, int buff_size) { - yaffs_CheckpointDevice cp; - __u32 nBytes; - __u32 nBlocks = (dev->internalEndBlock - dev->internalStartBlock + 1); - - int ok; - - ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp)); - if (!ok) - return 0; - - if (cp.structType != sizeof(cp)) - return 0; - - - yaffs_CheckpointDeviceToDevice(dev, &cp); - - nBytes = nBlocks * sizeof(yaffs_BlockInfo); - - ok = (yaffs_CheckpointRead(dev, dev->blockInfo, nBytes) == nBytes); - - if (!ok) - return 0; - nBytes = nBlocks * dev->chunkBitmapStride; - - ok = (yaffs_CheckpointRead(dev, dev->chunkBits, nBytes) == nBytes); - - return ok ? 1 : 0; -} - -static void yaffs_ObjectToCheckpointObject(yaffs_CheckpointObject *cp, - yaffs_Object *obj) -{ - - cp->objectId = obj->objectId; - cp->parentId = (obj->parent) ? obj->parent->objectId : 0; - cp->hdrChunk = obj->hdrChunk; - cp->variantType = obj->variantType; - cp->deleted = obj->deleted; - cp->softDeleted = obj->softDeleted; - cp->unlinked = obj->unlinked; - cp->fake = obj->fake; - cp->renameAllowed = obj->renameAllowed; - cp->unlinkAllowed = obj->unlinkAllowed; - cp->serial = obj->serial; - cp->nDataChunks = obj->nDataChunks; - - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) - cp->fileSizeOrEquivalentObjectId = obj->variant.fileVariant.fileSize; - else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - cp->fileSizeOrEquivalentObjectId = obj->variant.hardLinkVariant.equivalentObjectId; +#ifdef CONFIG_YAFFS_AUTO_UNICODE + if (dev->param.auto_unicode) { + if (*oh_name) { + /* It is an ASCII name, do an ASCII to + * unicode conversion */ + const char *ascii_oh_name = (const char *)oh_name; + int n = buff_size - 1; + while (n > 0 && *ascii_oh_name) { + *name = *ascii_oh_name; + name++; + ascii_oh_name++; + n--; + } + } else { + strncpy(name, oh_name + 1, buff_size - 1); + } + } else { +#else + { +#endif + strncpy(name, oh_name, buff_size - 1); + } } -static int yaffs_CheckpointObjectToObject(yaffs_Object *obj, yaffs_CheckpointObject *cp) +static void yaffs_load_oh_from_name(struct yaffs_dev *dev, YCHAR * oh_name, + const YCHAR * name) { +#ifdef CONFIG_YAFFS_AUTO_UNICODE - yaffs_Object *parent; + int is_ascii; + YCHAR *w; - if (obj->variantType != cp->variantType) { - T(YAFFS_TRACE_ERROR, (TSTR("Checkpoint read object %d type %d " - TCONT("chunk %d does not match existing object type %d") - TENDSTR), cp->objectId, cp->variantType, cp->hdrChunk, - obj->variantType)); - return 0; - } + if (dev->param.auto_unicode) { - obj->objectId = cp->objectId; + is_ascii = 1; + w = name; - if (cp->parentId) - parent = yaffs_FindOrCreateObjectByNumber( - obj->myDev, - cp->parentId, - YAFFS_OBJECT_TYPE_DIRECTORY); - else - parent = NULL; - - if (parent) { - if (parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, (TSTR("Checkpoint read object %d parent %d type %d" - TCONT(" chunk %d Parent type, %d, not directory") - TENDSTR), - cp->objectId, cp->parentId, cp->variantType, - cp->hdrChunk, parent->variantType)); - return 0; + /* Figure out if the name will fit in ascii character set */ + while (is_ascii && *w) { + if ((*w) & 0xff00) + is_ascii = 0; + w++; } - yaffs_AddObjectToDirectory(parent, obj); - } - - obj->hdrChunk = cp->hdrChunk; - obj->variantType = cp->variantType; - obj->deleted = cp->deleted; - obj->softDeleted = cp->softDeleted; - obj->unlinked = cp->unlinked; - obj->fake = cp->fake; - obj->renameAllowed = cp->renameAllowed; - obj->unlinkAllowed = cp->unlinkAllowed; - obj->serial = cp->serial; - obj->nDataChunks = cp->nDataChunks; - - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) - obj->variant.fileVariant.fileSize = cp->fileSizeOrEquivalentObjectId; - else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) - obj->variant.hardLinkVariant.equivalentObjectId = cp->fileSizeOrEquivalentObjectId; - - if (obj->hdrChunk > 0) - obj->lazyLoaded = 1; - return 1; -} - - - -static int yaffs_CheckpointTnodeWorker(yaffs_Object *in, yaffs_Tnode *tn, - __u32 level, int chunkOffset) -{ - int i; - yaffs_Device *dev = in->myDev; - int ok = 1; - int tnodeSize = yaffs_CalcTnodeSize(dev); - - if (tn) { - if (level > 0) { - for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { - if (tn->internal[i]) { - ok = yaffs_CheckpointTnodeWorker(in, - tn->internal[i], - level - 1, - (chunkOffset<<YAFFS_TNODES_INTERNAL_BITS) + i); - } + if (is_ascii) { + /* It is an ASCII name, so do a unicode to ascii conversion */ + char *ascii_oh_name = (char *)oh_name; + int n = YAFFS_MAX_NAME_LENGTH - 1; + while (n > 0 && *name) { + *ascii_oh_name = *name; + name++; + ascii_oh_name++; + n--; } - } else if (level == 0) { - __u32 baseOffset = chunkOffset << YAFFS_TNODES_LEVEL0_BITS; - ok = (yaffs_CheckpointWrite(dev, &baseOffset, sizeof(baseOffset)) == sizeof(baseOffset)); - if (ok) - ok = (yaffs_CheckpointWrite(dev, tn, tnodeSize) == tnodeSize); + } else { + /* It is a unicode name, so save starting at the second YCHAR */ + *oh_name = 0; + strncpy(oh_name + 1, name, + YAFFS_MAX_NAME_LENGTH - 2); } - } - - return ok; - -} - -static int yaffs_WriteCheckpointTnodes(yaffs_Object *obj) -{ - __u32 endMarker = ~0; - int ok = 1; - - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs_CheckpointTnodeWorker(obj, - obj->variant.fileVariant.top, - obj->variant.fileVariant.topLevel, - 0); - if (ok) - ok = (yaffs_CheckpointWrite(obj->myDev, &endMarker, sizeof(endMarker)) == - sizeof(endMarker)); - } + } else { +#else + { +#endif + strncpy(oh_name, name, YAFFS_MAX_NAME_LENGTH - 1); + } - return ok ? 1 : 0; } -static int yaffs_ReadCheckpointTnodes(yaffs_Object *obj) +/* UpdateObjectHeader updates the header on NAND for an object. + * If name is not NULL, then that new name is used. + */ +int yaffs_update_oh(struct yaffs_obj *in, const YCHAR * name, int force, + int is_shrink, int shadows, struct yaffs_xattr_mod *xmod) { - __u32 baseChunk; - int ok = 1; - yaffs_Device *dev = obj->myDev; - yaffs_FileStructure *fileStructPtr = &obj->variant.fileVariant; - yaffs_Tnode *tn; - int nread = 0; - int tnodeSize = yaffs_CalcTnodeSize(dev); - ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk)); + struct yaffs_block_info *bi; - while (ok && (~baseChunk)) { - nread++; - /* Read level 0 tnode */ + struct yaffs_dev *dev = in->my_dev; + int prev_chunk_id; + int ret_val = 0; + int result = 0; - tn = yaffs_GetTnodeRaw(dev); - if (tn) - ok = (yaffs_CheckpointRead(dev, tn, tnodeSize) == tnodeSize); - else - ok = 0; + int new_chunk_id; + struct yaffs_ext_tags new_tags; + struct yaffs_ext_tags old_tags; + const YCHAR *alias = NULL; - if (tn && ok) - ok = yaffs_AddOrFindLevel0Tnode(dev, - fileStructPtr, - baseChunk, - tn) ? 1 : 0; + u8 *buffer = NULL; + YCHAR old_name[YAFFS_MAX_NAME_LENGTH + 1]; - if (ok) - ok = (yaffs_CheckpointRead(dev, &baseChunk, sizeof(baseChunk)) == sizeof(baseChunk)); + struct yaffs_obj_hdr *oh = NULL; - } + strcpy(old_name, _Y("silly old name")); - T(YAFFS_TRACE_CHECKPOINT, ( - TSTR("Checkpoint read tnodes %d records, last %d. ok %d" TENDSTR), - nread, baseChunk, ok)); + if (!in->fake || in == dev->root_dir || + force || xmod) { - return ok ? 1 : 0; -} - - -static int yaffs_WriteCheckpointObjects(yaffs_Device *dev) -{ - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int i; - int ok = 1; - struct ylist_head *lh; + yaffs_check_gc(dev, 0); + yaffs_check_obj_details_loaded(in); + buffer = yaffs_get_temp_buffer(in->my_dev, __LINE__); + oh = (struct yaffs_obj_hdr *)buffer; - /* Iterate through the objects in each hash entry, - * dumping them to the checkpointing stream. - */ + prev_chunk_id = in->hdr_chunk; - for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) { - ylist_for_each(lh, &dev->objectBucket[i].list) { - if (lh) { - obj = ylist_entry(lh, yaffs_Object, hashLink); - if (!obj->deferedFree) { - yaffs_ObjectToCheckpointObject(&cp, obj); - cp.structType = sizeof(cp); + if (prev_chunk_id > 0) { + result = yaffs_rd_chunk_tags_nand(dev, prev_chunk_id, + buffer, &old_tags); - T(YAFFS_TRACE_CHECKPOINT, ( - TSTR("Checkpoint write object %d parent %d type %d chunk %d obj addr %p" TENDSTR), - cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk, obj)); + yaffs_verify_oh(in, oh, &old_tags, 0); - ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)); + memcpy(old_name, oh->name, sizeof(oh->name)); + memset(buffer, 0xFF, sizeof(struct yaffs_obj_hdr)); + } else { + memset(buffer, 0xFF, dev->data_bytes_per_chunk); + } - if (ok && obj->variantType == YAFFS_OBJECT_TYPE_FILE) - ok = yaffs_WriteCheckpointTnodes(obj); - } - } - } - } + oh->type = in->variant_type; + oh->yst_mode = in->yst_mode; + oh->shadows_obj = oh->inband_shadowed_obj_id = shadows; - /* Dump end of list */ - memset(&cp, 0xFF, sizeof(yaffs_CheckpointObject)); - cp.structType = sizeof(cp); + yaffs_load_attribs_oh(oh, in); - if (ok) - ok = (yaffs_CheckpointWrite(dev, &cp, sizeof(cp)) == sizeof(cp)); + if (in->parent) + oh->parent_obj_id = in->parent->obj_id; + else + oh->parent_obj_id = 0; - return ok ? 1 : 0; -} + if (name && *name) { + memset(oh->name, 0, sizeof(oh->name)); + yaffs_load_oh_from_name(dev, oh->name, name); + } else if (prev_chunk_id > 0) { + memcpy(oh->name, old_name, sizeof(oh->name)); + } else { + memset(oh->name, 0, sizeof(oh->name)); + } -static int yaffs_ReadCheckpointObjects(yaffs_Device *dev) -{ - yaffs_Object *obj; - yaffs_CheckpointObject cp; - int ok = 1; - int done = 0; - yaffs_Object *hardList = NULL; - - while (ok && !done) { - ok = (yaffs_CheckpointRead(dev, &cp, sizeof(cp)) == sizeof(cp)); - if (cp.structType != sizeof(cp)) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("struct size %d instead of %d ok %d"TENDSTR), - cp.structType, (int)sizeof(cp), ok)); - ok = 0; - } + oh->is_shrink = is_shrink; - T(YAFFS_TRACE_CHECKPOINT, (TSTR("Checkpoint read object %d parent %d type %d chunk %d " TENDSTR), - cp.objectId, cp.parentId, cp.variantType, cp.hdrChunk)); - - if (ok && cp.objectId == ~0) - done = 1; - else if (ok) { - obj = yaffs_FindOrCreateObjectByNumber(dev, cp.objectId, cp.variantType); - if (obj) { - ok = yaffs_CheckpointObjectToObject(obj, &cp); - if (!ok) - break; - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) { - ok = yaffs_ReadCheckpointTnodes(obj); - } else if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - obj->hardLinks.next = - (struct ylist_head *) hardList; - hardList = obj; - } - } else - ok = 0; + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Should not happen */ + break; + case YAFFS_OBJECT_TYPE_FILE: + oh->file_size = + (oh->parent_obj_id == YAFFS_OBJECTID_DELETED + || oh->parent_obj_id == + YAFFS_OBJECTID_UNLINKED) ? 0 : in-> + variant.file_variant.file_size; + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + oh->equiv_id = in->variant.hardlink_variant.equiv_id; + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + alias = in->variant.symlink_variant.alias; + if (!alias) + alias = _Y("no alias"); + strncpy(oh->alias, alias, YAFFS_MAX_ALIAS_LENGTH); + oh->alias[YAFFS_MAX_ALIAS_LENGTH] = 0; + break; } - } - - if (ok) - yaffs_HardlinkFixup(dev, hardList); - - return ok ? 1 : 0; -} - -static int yaffs_WriteCheckpointSum(yaffs_Device *dev) -{ - __u32 checkpointSum; - int ok; - - yaffs_GetCheckpointSum(dev, &checkpointSum); - - ok = (yaffs_CheckpointWrite(dev, &checkpointSum, sizeof(checkpointSum)) == sizeof(checkpointSum)); - - if (!ok) - return 0; - - return 1; -} - -static int yaffs_ReadCheckpointSum(yaffs_Device *dev) -{ - __u32 checkpointSum0; - __u32 checkpointSum1; - int ok; - - yaffs_GetCheckpointSum(dev, &checkpointSum0); - - ok = (yaffs_CheckpointRead(dev, &checkpointSum1, sizeof(checkpointSum1)) == sizeof(checkpointSum1)); - - if (!ok) - return 0; - - if (checkpointSum0 != checkpointSum1) - return 0; - - return 1; -} - - -static int yaffs_WriteCheckpointData(yaffs_Device *dev) -{ - int ok = 1; - - if (!yaffs_CheckpointRequired(dev)) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint write" TENDSTR))); - ok = 0; - } - - if (ok) - ok = yaffs_CheckpointOpen(dev, 1); - - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev, 1); - } - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint device" TENDSTR))); - ok = yaffs_WriteCheckpointDevice(dev); - } - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint objects" TENDSTR))); - ok = yaffs_WriteCheckpointObjects(dev); - } - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("write checkpoint validity" TENDSTR))); - ok = yaffs_WriteCheckpointValidityMarker(dev, 0); - } - - if (ok) - ok = yaffs_WriteCheckpointSum(dev); - if (!yaffs_CheckpointClose(dev)) - ok = 0; + /* process any xattrib modifications */ + if (xmod) + yaffs_apply_xattrib_mod(in, (char *)buffer, xmod); - if (ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; - - return dev->isCheckpointed; -} - -static int yaffs_ReadCheckpointData(yaffs_Device *dev) -{ - int ok = 1; - - if (dev->param.skipCheckpointRead || !dev->param.isYaffs2) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("skipping checkpoint read" TENDSTR))); - ok = 0; - } - - if (ok) - ok = yaffs_CheckpointOpen(dev, 0); /* open for read */ + /* Tags */ + yaffs_init_tags(&new_tags); + in->serial++; + new_tags.chunk_id = 0; + new_tags.obj_id = in->obj_id; + new_tags.serial_number = in->serial; - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev, 1); - } - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint device" TENDSTR))); - ok = yaffs_ReadCheckpointDevice(dev); - } - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint objects" TENDSTR))); - ok = yaffs_ReadCheckpointObjects(dev); - } - if (ok) { - T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint validity" TENDSTR))); - ok = yaffs_ReadCheckpointValidityMarker(dev, 0); - } + /* Add extra info for file header */ - if (ok) { - ok = yaffs_ReadCheckpointSum(dev); - T(YAFFS_TRACE_CHECKPOINT, (TSTR("read checkpoint checksum %d" TENDSTR), ok)); - } + new_tags.extra_available = 1; + new_tags.extra_parent_id = oh->parent_obj_id; + new_tags.extra_length = oh->file_size; + new_tags.extra_is_shrink = oh->is_shrink; + new_tags.extra_equiv_id = oh->equiv_id; + new_tags.extra_shadows = (oh->shadows_obj > 0) ? 1 : 0; + new_tags.extra_obj_type = in->variant_type; - if (!yaffs_CheckpointClose(dev)) - ok = 0; + yaffs_verify_oh(in, oh, &new_tags, 1); - if (ok) - dev->isCheckpointed = 1; - else - dev->isCheckpointed = 0; + /* Create new chunk in NAND */ + new_chunk_id = + yaffs_write_new_chunk(dev, buffer, &new_tags, + (prev_chunk_id > 0) ? 1 : 0); - return ok ? 1 : 0; + if (new_chunk_id >= 0) { -} + in->hdr_chunk = new_chunk_id; -static void yaffs_InvalidateCheckpoint(yaffs_Device *dev) -{ - if (dev->isCheckpointed || - dev->blocksInCheckpoint > 0) { - dev->isCheckpointed = 0; - yaffs_CheckpointInvalidateStream(dev); - } - if (dev->param.markSuperBlockDirty) - dev->param.markSuperBlockDirty(dev); -} + if (prev_chunk_id > 0) { + yaffs_chunk_del(dev, prev_chunk_id, 1, + __LINE__); + } + if (!yaffs_obj_cache_dirty(in)) + in->dirty = 0; -int yaffs_CheckpointSave(yaffs_Device *dev) -{ + /* If this was a shrink, then mark the block that the chunk lives on */ + if (is_shrink) { + bi = yaffs_get_block_info(in->my_dev, + new_chunk_id / + in->my_dev->param. + chunks_per_block); + bi->has_shrink_hdr = 1; + } - T(YAFFS_TRACE_CHECKPOINT, (TSTR("save entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); + } - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); + ret_val = new_chunk_id; - if (!dev->isCheckpointed) { - yaffs_InvalidateCheckpoint(dev); - yaffs_WriteCheckpointData(dev); } - T(YAFFS_TRACE_ALWAYS, (TSTR("save exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); + if (buffer) + yaffs_release_temp_buffer(dev, buffer, __LINE__); - return dev->isCheckpointed; -} - -int yaffs_CheckpointRestore(yaffs_Device *dev) -{ - int retval; - T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore entry: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); - - retval = yaffs_ReadCheckpointData(dev); - - if (dev->isCheckpointed) { - yaffs_VerifyObjects(dev); - yaffs_VerifyBlocks(dev); - yaffs_VerifyFreeChunks(dev); - } - - T(YAFFS_TRACE_CHECKPOINT, (TSTR("restore exit: isCheckpointed %d"TENDSTR), dev->isCheckpointed)); - - return retval; + return ret_val; } /*--------------------- File read/write ------------------------ @@ -5039,466 +3538,370 @@ int yaffs_CheckpointRestore(yaffs_Device *dev) * Curve-balls: the first chunk might also be the last chunk. */ -int yaffs_ReadDataFromFile(yaffs_Object *in, __u8 *buffer, loff_t offset, - int nBytes) +int yaffs_file_rd(struct yaffs_obj *in, u8 * buffer, loff_t offset, int n_bytes) { int chunk; - __u32 start; - int nToCopy; - int n = nBytes; - int nDone = 0; - yaffs_ChunkCache *cache; + u32 start; + int n_copy; + int n = n_bytes; + int n_done = 0; + struct yaffs_cache *cache; - yaffs_Device *dev; + struct yaffs_dev *dev; - dev = in->myDev; + dev = in->my_dev; while (n > 0) { - /* chunk = offset / dev->nDataBytesPerChunk + 1; */ - /* start = offset % dev->nDataBytesPerChunk; */ - yaffs_AddrToChunk(dev, offset, &chunk, &start); + /* chunk = offset / dev->data_bytes_per_chunk + 1; */ + /* start = offset % dev->data_bytes_per_chunk; */ + yaffs_addr_to_chunk(dev, offset, &chunk, &start); chunk++; /* OK now check for the curveball where the start and end are in * the same chunk. */ - if ((start + n) < dev->nDataBytesPerChunk) - nToCopy = n; + if ((start + n) < dev->data_bytes_per_chunk) + n_copy = n; else - nToCopy = dev->nDataBytesPerChunk - start; + n_copy = dev->data_bytes_per_chunk - start; - cache = yaffs_FindChunkCache(in, chunk); + cache = yaffs_find_chunk_cache(in, chunk); /* If the chunk is already in the cache or it is less than a whole chunk * or we're using inband tags then use the cache (if there is caching) * else bypass the cache. */ - if (cache || nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) { - if (dev->param.nShortOpCaches > 0) { + if (cache || n_copy != dev->data_bytes_per_chunk + || dev->param.inband_tags) { + if (dev->param.n_caches > 0) { /* If we can't find the data in the cache, then load it up. */ if (!cache) { - cache = yaffs_GrabChunkCache(in->myDev); + cache = + yaffs_grab_chunk_cache(in->my_dev); cache->object = in; - cache->chunkId = chunk; + cache->chunk_id = chunk; cache->dirty = 0; cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache-> - data); - cache->nBytes = 0; + yaffs_rd_data_obj(in, chunk, + cache->data); + cache->n_bytes = 0; } - yaffs_UseChunkCache(dev, cache, 0); + yaffs_use_cache(dev, cache, 0); cache->locked = 1; - - memcpy(buffer, &cache->data[start], nToCopy); + memcpy(buffer, &cache->data[start], n_copy); cache->locked = 0; } else { - /* Read into the local buffer then copy..*/ - - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); + /* Read into the local buffer then copy.. */ - memcpy(buffer, &localBuffer[start], nToCopy); + u8 *local_buffer = + yaffs_get_temp_buffer(dev, __LINE__); + yaffs_rd_data_obj(in, chunk, local_buffer); + memcpy(buffer, &local_buffer[start], n_copy); - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); + yaffs_release_temp_buffer(dev, local_buffer, + __LINE__); } } else { /* A full chunk. Read directly into the supplied buffer. */ - yaffs_ReadChunkDataFromObject(in, chunk, buffer); + yaffs_rd_data_obj(in, chunk, buffer); } - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; } - return nDone; + return n_done; } -int yaffs_DoWriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset, - int nBytes, int writeThrough) +int yaffs_do_file_wr(struct yaffs_obj *in, const u8 * buffer, loff_t offset, + int n_bytes, int write_trhrough) { int chunk; - __u32 start; - int nToCopy; - int n = nBytes; - int nDone = 0; - int nToWriteBack; - int startOfWrite = offset; - int chunkWritten = 0; - __u32 nBytesRead; - __u32 chunkStart; - - yaffs_Device *dev; - - dev = in->myDev; - - while (n > 0 && chunkWritten >= 0) { - yaffs_AddrToChunk(dev, offset, &chunk, &start); - - if (chunk * dev->nDataBytesPerChunk + start != offset || - start >= dev->nDataBytesPerChunk) { - T(YAFFS_TRACE_ERROR, ( - TSTR("AddrToChunk of offset %d gives chunk %d start %d" - TENDSTR), - (int)offset, chunk, start)); + u32 start; + int n_copy; + int n = n_bytes; + int n_done = 0; + int n_writeback; + int start_write = offset; + int chunk_written = 0; + u32 n_bytes_read; + u32 chunk_start; + + struct yaffs_dev *dev; + + dev = in->my_dev; + + while (n > 0 && chunk_written >= 0) { + yaffs_addr_to_chunk(dev, offset, &chunk, &start); + + if (chunk * dev->data_bytes_per_chunk + start != offset || + start >= dev->data_bytes_per_chunk) { + yaffs_trace(YAFFS_TRACE_ERROR, + "AddrToChunk of offset %d gives chunk %d start %d", + (int)offset, chunk, start); } - chunk++; /* File pos to chunk in file offset */ + chunk++; /* File pos to chunk in file offset */ /* OK now check for the curveball where the start and end are in * the same chunk. */ - if ((start + n) < dev->nDataBytesPerChunk) { - nToCopy = n; + if ((start + n) < dev->data_bytes_per_chunk) { + n_copy = n; /* Now folks, to calculate how many bytes to write back.... * If we're overwriting and not writing to then end of file then * we need to write back as much as was there before. */ - chunkStart = ((chunk - 1) * dev->nDataBytesPerChunk); + chunk_start = ((chunk - 1) * dev->data_bytes_per_chunk); - if (chunkStart > in->variant.fileVariant.fileSize) - nBytesRead = 0; /* Past end of file */ + if (chunk_start > in->variant.file_variant.file_size) + n_bytes_read = 0; /* Past end of file */ else - nBytesRead = in->variant.fileVariant.fileSize - chunkStart; + n_bytes_read = + in->variant.file_variant.file_size - + chunk_start; - if (nBytesRead > dev->nDataBytesPerChunk) - nBytesRead = dev->nDataBytesPerChunk; + if (n_bytes_read > dev->data_bytes_per_chunk) + n_bytes_read = dev->data_bytes_per_chunk; - nToWriteBack = - (nBytesRead > - (start + n)) ? nBytesRead : (start + n); + n_writeback = + (n_bytes_read > + (start + n)) ? n_bytes_read : (start + n); - if (nToWriteBack < 0 || nToWriteBack > dev->nDataBytesPerChunk) + if (n_writeback < 0 + || n_writeback > dev->data_bytes_per_chunk) YBUG(); } else { - nToCopy = dev->nDataBytesPerChunk - start; - nToWriteBack = dev->nDataBytesPerChunk; + n_copy = dev->data_bytes_per_chunk - start; + n_writeback = dev->data_bytes_per_chunk; } - if (nToCopy != dev->nDataBytesPerChunk || dev->param.inbandTags) { + if (n_copy != dev->data_bytes_per_chunk + || dev->param.inband_tags) { /* An incomplete start or end chunk (or maybe both start and end chunk), * or we're using inband tags, so we want to use the cache buffers. */ - if (dev->param.nShortOpCaches > 0) { - yaffs_ChunkCache *cache; + if (dev->param.n_caches > 0) { + struct yaffs_cache *cache; /* If we can't find the data in the cache, then load the cache */ - cache = yaffs_FindChunkCache(in, chunk); + cache = yaffs_find_chunk_cache(in, chunk); if (!cache - && yaffs_CheckSpaceForAllocation(dev, 1)) { - cache = yaffs_GrabChunkCache(dev); + && yaffs_check_alloc_available(dev, 1)) { + cache = yaffs_grab_chunk_cache(dev); cache->object = in; - cache->chunkId = chunk; + cache->chunk_id = chunk; cache->dirty = 0; cache->locked = 0; - yaffs_ReadChunkDataFromObject(in, chunk, - cache->data); + yaffs_rd_data_obj(in, chunk, + cache->data); } else if (cache && - !cache->dirty && - !yaffs_CheckSpaceForAllocation(dev, 1)) { + !cache->dirty && + !yaffs_check_alloc_available(dev, + 1)) { /* Drop the cache if it was a read cache item and * no space check has been made for it. */ - cache = NULL; + cache = NULL; } if (cache) { - yaffs_UseChunkCache(dev, cache, 1); + yaffs_use_cache(dev, cache, 1); cache->locked = 1; - memcpy(&cache->data[start], buffer, - nToCopy); - + n_copy); cache->locked = 0; - cache->nBytes = nToWriteBack; + cache->n_bytes = n_writeback; - if (writeThrough) { - chunkWritten = - yaffs_WriteChunkDataToObject + if (write_trhrough) { + chunk_written = + yaffs_wr_data_obj (cache->object, - cache->chunkId, - cache->data, cache->nBytes, - 1); + cache->chunk_id, + cache->data, + cache->n_bytes, 1); cache->dirty = 0; } } else { - chunkWritten = -1; /* fail the write */ + chunk_written = -1; /* fail the write */ } } else { /* An incomplete start or end chunk (or maybe both start and end chunk) * Read into the local buffer then copy, then copy over and write back. */ - __u8 *localBuffer = - yaffs_GetTempBuffer(dev, __LINE__); + u8 *local_buffer = + yaffs_get_temp_buffer(dev, __LINE__); - yaffs_ReadChunkDataFromObject(in, chunk, - localBuffer); + yaffs_rd_data_obj(in, chunk, local_buffer); + memcpy(&local_buffer[start], buffer, n_copy); + chunk_written = + yaffs_wr_data_obj(in, chunk, + local_buffer, + n_writeback, 0); - memcpy(&localBuffer[start], buffer, nToCopy); - - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, - localBuffer, - nToWriteBack, - 0); - - yaffs_ReleaseTempBuffer(dev, localBuffer, - __LINE__); + yaffs_release_temp_buffer(dev, local_buffer, + __LINE__); } } else { /* A full chunk. Write directly from the supplied buffer. */ - - - chunkWritten = - yaffs_WriteChunkDataToObject(in, chunk, buffer, - dev->nDataBytesPerChunk, - 0); + chunk_written = + yaffs_wr_data_obj(in, chunk, buffer, + dev->data_bytes_per_chunk, 0); /* Since we've overwritten the cached data, we better invalidate it. */ - yaffs_InvalidateChunkCache(in, chunk); + yaffs_invalidate_chunk_cache(in, chunk); } - if (chunkWritten >= 0) { - n -= nToCopy; - offset += nToCopy; - buffer += nToCopy; - nDone += nToCopy; + if (chunk_written >= 0) { + n -= n_copy; + offset += n_copy; + buffer += n_copy; + n_done += n_copy; } } /* Update file object */ - if ((startOfWrite + nDone) > in->variant.fileVariant.fileSize) - in->variant.fileVariant.fileSize = (startOfWrite + nDone); + if ((start_write + n_done) > in->variant.file_variant.file_size) + in->variant.file_variant.file_size = (start_write + n_done); in->dirty = 1; - return nDone; + return n_done; } -int yaffs_WriteDataToFile(yaffs_Object *in, const __u8 *buffer, loff_t offset, - int nBytes, int writeThrough) +int yaffs_wr_file(struct yaffs_obj *in, const u8 * buffer, loff_t offset, + int n_bytes, int write_trhrough) { - yaffs_HandleHole(in,offset); - return yaffs_DoWriteDataToFile(in,buffer,offset,nBytes,writeThrough); + yaffs2_handle_hole(in, offset); + return yaffs_do_file_wr(in, buffer, offset, n_bytes, write_trhrough); } - - /* ---------------------- File resizing stuff ------------------ */ -static void yaffs_PruneResizedChunks(yaffs_Object *in, int newSize) +static void yaffs_prune_chunks(struct yaffs_obj *in, int new_size) { - yaffs_Device *dev = in->myDev; - int oldFileSize = in->variant.fileVariant.fileSize; + struct yaffs_dev *dev = in->my_dev; + int old_size = in->variant.file_variant.file_size; - int lastDel = 1 + (oldFileSize - 1) / dev->nDataBytesPerChunk; + int last_del = 1 + (old_size - 1) / dev->data_bytes_per_chunk; - int startDel = 1 + (newSize + dev->nDataBytesPerChunk - 1) / - dev->nDataBytesPerChunk; + int start_del = 1 + (new_size + dev->data_bytes_per_chunk - 1) / + dev->data_bytes_per_chunk; int i; - int chunkId; + int chunk_id; /* Delete backwards so that we don't end up with holes if * power is lost part-way through the operation. */ - for (i = lastDel; i >= startDel; i--) { + for (i = last_del; i >= start_del; i--) { /* NB this could be optimised somewhat, * eg. could retrieve the tags and write them without - * using yaffs_DeleteChunk + * using yaffs_chunk_del */ - chunkId = yaffs_FindAndDeleteChunkInFile(in, i, NULL); - if (chunkId > 0) { - if (chunkId < - (dev->internalStartBlock * dev->param.nChunksPerBlock) - || chunkId >= - ((dev->internalEndBlock + - 1) * dev->param.nChunksPerBlock)) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Found daft chunkId %d for %d" TENDSTR), - chunkId, i)); + chunk_id = yaffs_find_del_file_chunk(in, i, NULL); + if (chunk_id > 0) { + if (chunk_id < + (dev->internal_start_block * + dev->param.chunks_per_block) + || chunk_id >= + ((dev->internal_end_block + + 1) * dev->param.chunks_per_block)) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Found daft chunk_id %d for %d", + chunk_id, i); } else { - in->nDataChunks--; - yaffs_DeleteChunk(dev, chunkId, 1, __LINE__); + in->n_data_chunks--; + yaffs_chunk_del(dev, chunk_id, 1, __LINE__); } } } } - -static void yaffs_ResizeDown( yaffs_Object *obj, loff_t newSize) +void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size) { - int newFullChunks; - __u32 newSizeOfPartialChunk; - yaffs_Device *dev = obj->myDev; + int new_full; + u32 new_partial; + struct yaffs_dev *dev = obj->my_dev; - yaffs_AddrToChunk(dev, newSize, &newFullChunks, &newSizeOfPartialChunk); + yaffs_addr_to_chunk(dev, new_size, &new_full, &new_partial); - yaffs_PruneResizedChunks(obj, newSize); + yaffs_prune_chunks(obj, new_size); - if (newSizeOfPartialChunk != 0) { - int lastChunk = 1 + newFullChunks; - __u8 *localBuffer = yaffs_GetTempBuffer(dev, __LINE__); + if (new_partial != 0) { + int last_chunk = 1 + new_full; + u8 *local_buffer = yaffs_get_temp_buffer(dev, __LINE__); - /* Got to read and rewrite the last chunk with its new size and zero pad */ - yaffs_ReadChunkDataFromObject(obj, lastChunk, localBuffer); - memset(localBuffer + newSizeOfPartialChunk, 0, - dev->nDataBytesPerChunk - newSizeOfPartialChunk); + /* Rewrite the last chunk with its new size and zero pad */ + yaffs_rd_data_obj(obj, last_chunk, local_buffer); + memset(local_buffer + new_partial, 0, + dev->data_bytes_per_chunk - new_partial); - yaffs_WriteChunkDataToObject(obj, lastChunk, localBuffer, - newSizeOfPartialChunk, 1); + yaffs_wr_data_obj(obj, last_chunk, local_buffer, + new_partial, 1); - yaffs_ReleaseTempBuffer(dev, localBuffer, __LINE__); + yaffs_release_temp_buffer(dev, local_buffer, __LINE__); } - obj->variant.fileVariant.fileSize = newSize; + obj->variant.file_variant.file_size = new_size; - yaffs_PruneFileStructure(dev, &obj->variant.fileVariant); + yaffs_prune_tree(dev, &obj->variant.file_variant); } - -static int yaffs_HandleHole(yaffs_Object *obj, loff_t newSize) +int yaffs_resize_file(struct yaffs_obj *in, loff_t new_size) { - /* if newsSize > oldFileSize. - * We're going to be writing a hole. - * If the hole is small then write zeros otherwise write a start of hole marker. - */ - - - loff_t oldFileSize; - int increase; - int smallHole ; - int result = YAFFS_OK; - yaffs_Device *dev = NULL; - - __u8 *localBuffer = NULL; - - int smallIncreaseOk = 0; - - if(!obj) - return YAFFS_FAIL; + struct yaffs_dev *dev = in->my_dev; + int old_size = in->variant.file_variant.file_size; - if(obj->variantType != YAFFS_OBJECT_TYPE_FILE) - return YAFFS_FAIL; - - dev = obj->myDev; - - /* Bail out if not yaffs2 mode */ - if(!dev->param.isYaffs2) - return YAFFS_OK; + yaffs_flush_file_cache(in); + yaffs_invalidate_whole_cache(in); - oldFileSize = obj->variant.fileVariant.fileSize; - - if (newSize <= oldFileSize) - return YAFFS_OK; + yaffs_check_gc(dev, 0); - increase = newSize - oldFileSize; - - if(increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->nDataBytesPerChunk && - yaffs_CheckSpaceForAllocation(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1)) - smallHole = 1; - else - smallHole = 0; - - if(smallHole) - localBuffer= yaffs_GetTempBuffer(dev, __LINE__); - - if(localBuffer){ - /* fill hole with zero bytes */ - int pos = oldFileSize; - int thisWrite; - int written; - memset(localBuffer,0,dev->nDataBytesPerChunk); - smallIncreaseOk = 1; - - while(increase > 0 && smallIncreaseOk){ - thisWrite = increase; - if(thisWrite > dev->nDataBytesPerChunk) - thisWrite = dev->nDataBytesPerChunk; - written = yaffs_DoWriteDataToFile(obj,localBuffer,pos,thisWrite,0); - if(written == thisWrite){ - pos += thisWrite; - increase -= thisWrite; - } else - smallIncreaseOk = 0; - } - - yaffs_ReleaseTempBuffer(dev,localBuffer,__LINE__); - - /* If we were out of space then reverse any chunks we've added */ - if(!smallIncreaseOk) - yaffs_ResizeDown(obj, oldFileSize); - } - - if (!smallIncreaseOk && - obj->parent && - obj->parent->objectId != YAFFS_OBJECTID_UNLINKED && - obj->parent->objectId != YAFFS_OBJECTID_DELETED){ - /* Write a hole start header with the old file size */ - yaffs_UpdateObjectHeader(obj, NULL, 0,1,0); - } - - return result; - -} - -int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize) -{ - yaffs_Device *dev = in->myDev; - int oldFileSize = in->variant.fileVariant.fileSize; - - yaffs_FlushFilesChunkCache(in); - yaffs_InvalidateWholeChunkCache(in); - - yaffs_CheckGarbageCollection(dev,0); - - if (in->variantType != YAFFS_OBJECT_TYPE_FILE) + if (in->variant_type != YAFFS_OBJECT_TYPE_FILE) return YAFFS_FAIL; - if (newSize == oldFileSize) + if (new_size == old_size) return YAFFS_OK; - - if(newSize > oldFileSize){ - yaffs_HandleHole(in,newSize); - in->variant.fileVariant.fileSize = newSize; + + if (new_size > old_size) { + yaffs2_handle_hole(in, new_size); + in->variant.file_variant.file_size = new_size; } else { - /* newSize < oldFileSize */ - yaffs_ResizeDown(in, newSize); - } + /* new_size < old_size */ + yaffs_resize_file_down(in, new_size); + } /* Write a new object header to reflect the resize. * show we've shrunk the file, if need be @@ -5506,234 +3909,188 @@ int yaffs_ResizeFile(yaffs_Object *in, loff_t newSize) * and is not shadowed. */ if (in->parent && - !in->isShadowed && - in->parent->objectId != YAFFS_OBJECTID_UNLINKED && - in->parent->objectId != YAFFS_OBJECTID_DELETED) - yaffs_UpdateObjectHeader(in, NULL, 0,0,0); - + !in->is_shadowed && + in->parent->obj_id != YAFFS_OBJECTID_UNLINKED && + in->parent->obj_id != YAFFS_OBJECTID_DELETED) + yaffs_update_oh(in, NULL, 0, 0, 0, NULL); return YAFFS_OK; } -loff_t yaffs_GetFileSize(yaffs_Object *obj) +int yaffs_flush_file(struct yaffs_obj *in, int update_time, int data_sync) { - YCHAR *alias = NULL; - obj = yaffs_GetEquivalentObject(obj); - - switch (obj->variantType) { - case YAFFS_OBJECT_TYPE_FILE: - return obj->variant.fileVariant.fileSize; - case YAFFS_OBJECT_TYPE_SYMLINK: - alias = obj->variant.symLinkVariant.alias; - if(!alias) - return 0; - return yaffs_strnlen(alias,YAFFS_MAX_ALIAS_LENGTH); - default: - return 0; - } -} - - - -int yaffs_FlushFile(yaffs_Object *in, int updateTime, int dataSync) -{ - int retVal; + int ret_val; if (in->dirty) { - yaffs_FlushFilesChunkCache(in); - if(dataSync) /* Only sync data */ - retVal=YAFFS_OK; + yaffs_flush_file_cache(in); + if (data_sync) /* Only sync data */ + ret_val = YAFFS_OK; else { - if (updateTime) { -#ifdef CONFIG_YAFFS_WINCE - yfsd_WinFileTimeNow(in->win_mtime); -#else + if (update_time) + yaffs_load_current_time(in, 0, 0); - in->yst_mtime = Y_CURRENT_TIME; - -#endif - } - - retVal = (yaffs_UpdateObjectHeader(in, NULL, 0, 0, 0) >= - 0) ? YAFFS_OK : YAFFS_FAIL; + ret_val = (yaffs_update_oh(in, NULL, 0, 0, 0, NULL) >= + 0) ? YAFFS_OK : YAFFS_FAIL; } } else { - retVal = YAFFS_OK; + ret_val = YAFFS_OK; } - return retVal; + return ret_val; } -static int yaffs_DoGenericObjectDeletion(yaffs_Object *in) -{ - /* First off, invalidate the file's data in the cache, without flushing. */ - yaffs_InvalidateWholeChunkCache(in); - - if (in->myDev->param.isYaffs2 && (in->parent != in->myDev->deletedDir)) { - /* Move to the unlinked directory so we have a record that it was deleted. */ - yaffs_ChangeObjectName(in, in->myDev->deletedDir, _Y("deleted"), 0, 0); - - } - - yaffs_RemoveObjectFromDirectory(in); - yaffs_DeleteChunk(in->myDev, in->hdrChunk, 1, __LINE__); - in->hdrChunk = 0; - - yaffs_FreeObject(in); - return YAFFS_OK; - -} - -/* yaffs_DeleteFile deletes the whole file data +/* yaffs_del_file deletes the whole file data * and the inode associated with the file. * It does not delete the links associated with the file. */ -static int yaffs_UnlinkFileIfNeeded(yaffs_Object *in) +static int yaffs_unlink_file_if_needed(struct yaffs_obj *in) { - int retVal; - int immediateDeletion = 0; - yaffs_Device *dev = in->myDev; + int ret_val; + int del_now = 0; + struct yaffs_dev *dev = in->my_dev; - if (!in->myInode) - immediateDeletion = 1; + if (!in->my_inode) + del_now = 1; - if (immediateDeletion) { - retVal = - yaffs_ChangeObjectName(in, in->myDev->deletedDir, - _Y("deleted"), 0, 0); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: immediate deletion of file %d" TENDSTR), - in->objectId)); + if (del_now) { + ret_val = + yaffs_change_obj_name(in, in->my_dev->del_dir, + _Y("deleted"), 0, 0); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: immediate deletion of file %d", + in->obj_id); in->deleted = 1; - in->myDev->nDeletedFiles++; - if (dev->param.disableSoftDelete || dev->param.isYaffs2) - yaffs_ResizeFile(in, 0); - yaffs_SoftDeleteFile(in); + in->my_dev->n_deleted_files++; + if (dev->param.disable_soft_del || dev->param.is_yaffs2) + yaffs_resize_file(in, 0); + yaffs_soft_del_file(in); } else { - retVal = - yaffs_ChangeObjectName(in, in->myDev->unlinkedDir, - _Y("unlinked"), 0, 0); + ret_val = + yaffs_change_obj_name(in, in->my_dev->unlinked_dir, + _Y("unlinked"), 0, 0); } - - return retVal; + return ret_val; } -int yaffs_DeleteFile(yaffs_Object *in) +int yaffs_del_file(struct yaffs_obj *in) { - int retVal = YAFFS_OK; - int deleted; /* Need to cache value on stack if in is freed */ - yaffs_Device *dev = in->myDev; + int ret_val = YAFFS_OK; + int deleted; /* Need to cache value on stack if in is freed */ + struct yaffs_dev *dev = in->my_dev; - if (dev->param.disableSoftDelete || dev->param.isYaffs2) - yaffs_ResizeFile(in, 0); + if (dev->param.disable_soft_del || dev->param.is_yaffs2) + yaffs_resize_file(in, 0); - if (in->nDataChunks > 0) { + if (in->n_data_chunks > 0) { /* Use soft deletion if there is data in the file. * That won't be the case if it has been resized to zero. */ if (!in->unlinked) - retVal = yaffs_UnlinkFileIfNeeded(in); + ret_val = yaffs_unlink_file_if_needed(in); deleted = in->deleted; - if (retVal == YAFFS_OK && in->unlinked && !in->deleted) { + if (ret_val == YAFFS_OK && in->unlinked && !in->deleted) { in->deleted = 1; deleted = 1; - in->myDev->nDeletedFiles++; - yaffs_SoftDeleteFile(in); + in->my_dev->n_deleted_files++; + yaffs_soft_del_file(in); } return deleted ? YAFFS_OK : YAFFS_FAIL; } else { /* The file has no data chunks so we toss it immediately */ - yaffs_FreeTnode(in->myDev, in->variant.fileVariant.top); - in->variant.fileVariant.top = NULL; - yaffs_DoGenericObjectDeletion(in); + yaffs_free_tnode(in->my_dev, in->variant.file_variant.top); + in->variant.file_variant.top = NULL; + yaffs_generic_obj_del(in); return YAFFS_OK; } } -static int yaffs_IsNonEmptyDirectory(yaffs_Object *obj) +int yaffs_is_non_empty_dir(struct yaffs_obj *obj) { - return (obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) && - !(ylist_empty(&obj->variant.directoryVariant.children)); + return (obj && + obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) && + !(list_empty(&obj->variant.dir_variant.children)); } -static int yaffs_DeleteDirectory(yaffs_Object *obj) +static int yaffs_del_dir(struct yaffs_obj *obj) { /* First check that the directory is empty. */ - if (yaffs_IsNonEmptyDirectory(obj)) + if (yaffs_is_non_empty_dir(obj)) return YAFFS_FAIL; - return yaffs_DoGenericObjectDeletion(obj); + return yaffs_generic_obj_del(obj); } -static int yaffs_DeleteSymLink(yaffs_Object *in) +static int yaffs_del_symlink(struct yaffs_obj *in) { - if(in->variant.symLinkVariant.alias) - YFREE(in->variant.symLinkVariant.alias); - in->variant.symLinkVariant.alias=NULL; + if (in->variant.symlink_variant.alias) + kfree(in->variant.symlink_variant.alias); + in->variant.symlink_variant.alias = NULL; - return yaffs_DoGenericObjectDeletion(in); + return yaffs_generic_obj_del(in); } -static int yaffs_DeleteHardLink(yaffs_Object *in) +static int yaffs_del_link(struct yaffs_obj *in) { /* remove this hardlink from the list assocaited with the equivalent * object */ - ylist_del_init(&in->hardLinks); - return yaffs_DoGenericObjectDeletion(in); + list_del_init(&in->hard_links); + return yaffs_generic_obj_del(in); } -int yaffs_DeleteObject(yaffs_Object *obj) +int yaffs_del_obj(struct yaffs_obj *obj) { -int retVal = -1; - switch (obj->variantType) { + int ret_val = -1; + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: - retVal = yaffs_DeleteFile(obj); + ret_val = yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - if(!ylist_empty(&obj->variant.directoryVariant.dirty)){ - T(YAFFS_TRACE_BACKGROUND, (TSTR("Remove object %d from dirty directories" TENDSTR),obj->objectId)); - ylist_del_init(&obj->variant.directoryVariant.dirty); + if (!list_empty(&obj->variant.dir_variant.dirty)) { + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "Remove object %d from dirty directories", + obj->obj_id); + list_del_init(&obj->variant.dir_variant.dirty); } - return yaffs_DeleteDirectory(obj); + return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: - retVal = yaffs_DeleteSymLink(obj); + ret_val = yaffs_del_symlink(obj); break; case YAFFS_OBJECT_TYPE_HARDLINK: - retVal = yaffs_DeleteHardLink(obj); + ret_val = yaffs_del_link(obj); break; case YAFFS_OBJECT_TYPE_SPECIAL: - retVal = yaffs_DoGenericObjectDeletion(obj); + ret_val = yaffs_generic_obj_del(obj); break; case YAFFS_OBJECT_TYPE_UNKNOWN: - retVal = 0; + ret_val = 0; break; /* should not happen. */ } - return retVal; + return ret_val; } -static int yaffs_UnlinkWorker(yaffs_Object *obj) +static int yaffs_unlink_worker(struct yaffs_obj *obj) { - int immediateDeletion = 0; + int del_now = 0; - if (!obj->myInode) - immediateDeletion = 1; + if (!obj->my_inode) + del_now = 1; - if(obj) - yaffs_UpdateParent(obj->parent); + if (obj) + yaffs_update_parent(obj->parent); - if (obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { - return yaffs_DeleteHardLink(obj); - } else if (!ylist_empty(&obj->hardLinks)) { + if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { + return yaffs_del_link(obj); + } else if (!list_empty(&obj->hard_links)) { /* Curve ball: We're unlinking an object that has a hardlink. * * This problem arises because we are not strictly following @@ -5748,80 +4105,158 @@ static int yaffs_UnlinkWorker(yaffs_Object *obj) * - Delete the hardlink */ - yaffs_Object *hl; - yaffs_Object *parent; - int retVal; + struct yaffs_obj *hl; + struct yaffs_obj *parent; + int ret_val; YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; - hl = ylist_entry(obj->hardLinks.next, yaffs_Object, hardLinks); + hl = list_entry(obj->hard_links.next, struct yaffs_obj, + hard_links); - yaffs_GetObjectName(hl, name, YAFFS_MAX_NAME_LENGTH + 1); + yaffs_get_obj_name(hl, name, YAFFS_MAX_NAME_LENGTH + 1); parent = hl->parent; - ylist_del_init(&hl->hardLinks); + list_del_init(&hl->hard_links); - yaffs_AddObjectToDirectory(obj->myDev->unlinkedDir, hl); + yaffs_add_obj_to_dir(obj->my_dev->unlinked_dir, hl); - retVal = yaffs_ChangeObjectName(obj,parent, name, 0, 0); + ret_val = yaffs_change_obj_name(obj, parent, name, 0, 0); - if (retVal == YAFFS_OK) - retVal = yaffs_DoGenericObjectDeletion(hl); + if (ret_val == YAFFS_OK) + ret_val = yaffs_generic_obj_del(hl); - return retVal; + return ret_val; - } else if (immediateDeletion) { - switch (obj->variantType) { + } else if (del_now) { + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: - return yaffs_DeleteFile(obj); + return yaffs_del_file(obj); break; case YAFFS_OBJECT_TYPE_DIRECTORY: - ylist_del_init(&obj->variant.directoryVariant.dirty); - return yaffs_DeleteDirectory(obj); + list_del_init(&obj->variant.dir_variant.dirty); + return yaffs_del_dir(obj); break; case YAFFS_OBJECT_TYPE_SYMLINK: - return yaffs_DeleteSymLink(obj); + return yaffs_del_symlink(obj); break; case YAFFS_OBJECT_TYPE_SPECIAL: - return yaffs_DoGenericObjectDeletion(obj); + return yaffs_generic_obj_del(obj); break; case YAFFS_OBJECT_TYPE_HARDLINK: case YAFFS_OBJECT_TYPE_UNKNOWN: default: return YAFFS_FAIL; } - } else if(yaffs_IsNonEmptyDirectory(obj)) + } else if (yaffs_is_non_empty_dir(obj)) { return YAFFS_FAIL; - else - return yaffs_ChangeObjectName(obj, obj->myDev->unlinkedDir, - _Y("unlinked"), 0, 0); + } else { + return yaffs_change_obj_name(obj, obj->my_dev->unlinked_dir, + _Y("unlinked"), 0, 0); + } } - -static int yaffs_UnlinkObject(yaffs_Object *obj) +static int yaffs_unlink_obj(struct yaffs_obj *obj) { - if (obj && obj->unlinkAllowed) - return yaffs_UnlinkWorker(obj); + if (obj && obj->unlink_allowed) + return yaffs_unlink_worker(obj); return YAFFS_FAIL; } -int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name) + +int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name) +{ + struct yaffs_obj *obj; + + obj = yaffs_find_by_name(dir, name); + return yaffs_unlink_obj(obj); +} + +/* Note: + * If old_name is NULL then we take old_dir as the object to be renamed. + */ +int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name, + struct yaffs_obj *new_dir, const YCHAR * new_name) { - yaffs_Object *obj; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *existing_target = NULL; + int force = 0; + int result; + struct yaffs_dev *dev; + + if (!old_dir || old_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + YBUG(); + if (!new_dir || new_dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) + YBUG(); + + dev = old_dir->my_dev; + +#ifdef CONFIG_YAFFS_CASE_INSENSITIVE + /* Special case for case insemsitive systems. + * While look-up is case insensitive, the name isn't. + * Therefore we might want to change x.txt to X.txt + */ + if (old_dir == new_dir && + old_name && new_name && + strcmp(old_name, new_name) == 0) + force = 1; +#endif + + if (strnlen(new_name, YAFFS_MAX_NAME_LENGTH + 1) > + YAFFS_MAX_NAME_LENGTH) + /* ENAMETOOLONG */ + return YAFFS_FAIL; + + if(old_name) + obj = yaffs_find_by_name(old_dir, old_name); + else{ + obj = old_dir; + old_dir = obj->parent; + } + + + if (obj && obj->rename_allowed) { + + /* Now do the handling for an existing target, if there is one */ - obj = yaffs_FindObjectByName(dir, name); - return yaffs_UnlinkObject(obj); + existing_target = yaffs_find_by_name(new_dir, new_name); + if (yaffs_is_non_empty_dir(existing_target)){ + return YAFFS_FAIL; /* ENOTEMPTY */ + } else if (existing_target && existing_target != obj) { + /* Nuke the target first, using shadowing, + * but only if it isn't the same object. + * + * Note we must disable gc otherwise it can mess up the shadowing. + * + */ + dev->gc_disable = 1; + yaffs_change_obj_name(obj, new_dir, new_name, force, + existing_target->obj_id); + existing_target->is_shadowed = 1; + yaffs_unlink_obj(existing_target); + dev->gc_disable = 0; + } + + result = yaffs_change_obj_name(obj, new_dir, new_name, 1, 0); + + yaffs_update_parent(old_dir); + if (new_dir != old_dir) + yaffs_update_parent(new_dir); + + return result; + } + return YAFFS_FAIL; } /*----------------------- Initialisation Scanning ---------------------- */ -static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId, - int backwardScanning) +void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, + int backward_scanning) { - yaffs_Object *obj; + struct yaffs_obj *obj; - if (!backwardScanning) { + if (!backward_scanning) { /* Handle YAFFS1 forward scanning case * For YAFFS1 we always do the deletion */ @@ -5830,8 +4265,8 @@ static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId, /* Handle YAFFS2 case (backward scanning) * If the shadowed object exists then ignore. */ - obj = yaffs_FindObjectByNumber(dev, objId); - if(obj) + obj = yaffs_find_by_number(dev, obj_id); + if (obj) return; } @@ -5839,98 +4274,69 @@ static void yaffs_HandleShadowedObject(yaffs_Device *dev, int objId, * We put it in unlinked dir to be cleaned up after the scanning */ obj = - yaffs_FindOrCreateObjectByNumber(dev, objId, - YAFFS_OBJECT_TYPE_FILE); + yaffs_find_or_create_by_number(dev, obj_id, YAFFS_OBJECT_TYPE_FILE); if (!obj) return; - obj->isShadowed = 1; - yaffs_AddObjectToDirectory(dev->unlinkedDir, obj); - obj->variant.fileVariant.shrinkSize = 0; + obj->is_shadowed = 1; + yaffs_add_obj_to_dir(dev->unlinked_dir, obj); + obj->variant.file_variant.shrink_size = 0; obj->valid = 1; /* So that we don't read any other info for this file */ } -typedef struct { - int seq; - int block; -} yaffs_BlockIndex; - - -static void yaffs_HardlinkFixup(yaffs_Device *dev, yaffs_Object *hardList) +void yaffs_link_fixup(struct yaffs_dev *dev, struct yaffs_obj *hard_list) { - yaffs_Object *hl; - yaffs_Object *in; + struct yaffs_obj *hl; + struct yaffs_obj *in; - while (hardList) { - hl = hardList; - hardList = (yaffs_Object *) (hardList->hardLinks.next); + while (hard_list) { + hl = hard_list; + hard_list = (struct yaffs_obj *)(hard_list->hard_links.next); - in = yaffs_FindObjectByNumber(dev, - hl->variant.hardLinkVariant. - equivalentObjectId); + in = yaffs_find_by_number(dev, + hl->variant. + hardlink_variant.equiv_id); if (in) { /* Add the hardlink pointers */ - hl->variant.hardLinkVariant.equivalentObject = in; - ylist_add(&hl->hardLinks, &in->hardLinks); + hl->variant.hardlink_variant.equiv_obj = in; + list_add(&hl->hard_links, &in->hard_links); } else { /* Todo Need to report/handle this better. * Got a problem... hardlink to a non-existant object */ - hl->variant.hardLinkVariant.equivalentObject = NULL; - YINIT_LIST_HEAD(&hl->hardLinks); + hl->variant.hardlink_variant.equiv_obj = NULL; + INIT_LIST_HEAD(&hl->hard_links); } } } - - - - -static int ybicmp(const void *a, const void *b) -{ - register int aseq = ((yaffs_BlockIndex *)a)->seq; - register int bseq = ((yaffs_BlockIndex *)b)->seq; - register int ablock = ((yaffs_BlockIndex *)a)->block; - register int bblock = ((yaffs_BlockIndex *)b)->block; - if (aseq == bseq) - return ablock - bblock; - else - return aseq - bseq; -} - - -struct yaffs_ShadowFixerStruct { - int objectId; - int shadowedId; - struct yaffs_ShadowFixerStruct *next; -}; - - -static void yaffs_StripDeletedObjects(yaffs_Device *dev) +static void yaffs_strip_deleted_objs(struct yaffs_dev *dev) { /* - * Sort out state of unlinked and deleted objects after scanning. - */ - struct ylist_head *i; - struct ylist_head *n; - yaffs_Object *l; + * Sort out state of unlinked and deleted objects after scanning. + */ + struct list_head *i; + struct list_head *n; + struct yaffs_obj *l; + + if (dev->read_only) + return; /* Soft delete all the unlinked files */ - ylist_for_each_safe(i, n, - &dev->unlinkedDir->variant.directoryVariant.children) { + list_for_each_safe(i, n, + &dev->unlinked_dir->variant.dir_variant.children) { if (i) { - l = ylist_entry(i, yaffs_Object, siblings); - yaffs_DeleteObject(l); + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } } - ylist_for_each_safe(i, n, - &dev->deletedDir->variant.directoryVariant.children) { + list_for_each_safe(i, n, &dev->del_dir->variant.dir_variant.children) { if (i) { - l = ylist_entry(i, yaffs_Object, siblings); - yaffs_DeleteObject(l); + l = list_entry(i, struct yaffs_obj, siblings); + yaffs_del_obj(l); } } @@ -5946,1514 +4352,171 @@ static void yaffs_StripDeletedObjects(yaffs_Device *dev) * Note: * This code assumes that we don't ever change the current relationships between * directories: - * rootDir->parent == unlinkedDir->parent == deletedDir->parent == NULL - * lostNfound->parent == rootDir + * root_dir->parent == unlinked_dir->parent == del_dir->parent == NULL + * lost-n-found->parent == root_dir * * This fixes the problem where directories might have inadvertently been deleted * leaving the object "hanging" without being rooted in the directory tree. */ - -static int yaffs_HasNULLParent(yaffs_Device *dev, yaffs_Object *obj) + +static int yaffs_has_null_parent(struct yaffs_dev *dev, struct yaffs_obj *obj) { - return (obj == dev->deletedDir || - obj == dev->unlinkedDir|| - obj == dev->rootDir); + return (obj == dev->del_dir || + obj == dev->unlinked_dir || obj == dev->root_dir); } -static void yaffs_FixHangingObjects(yaffs_Device *dev) +static void yaffs_fix_hanging_objs(struct yaffs_dev *dev) { - yaffs_Object *obj; - yaffs_Object *parent; + struct yaffs_obj *obj; + struct yaffs_obj *parent; int i; - struct ylist_head *lh; - struct ylist_head *n; - int depthLimit; + struct list_head *lh; + struct list_head *n; + int depth_limit; int hanging; + if (dev->read_only) + return; /* Iterate through the objects in each hash entry, * looking at each object. * Make sure it is rooted. */ - for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { - ylist_for_each_safe(lh, n, &dev->objectBucket[i].list) { + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each_safe(lh, n, &dev->obj_bucket[i].list) { if (lh) { - obj = ylist_entry(lh, yaffs_Object, hashLink); - parent= obj->parent; - - if(yaffs_HasNULLParent(dev,obj)){ + obj = + list_entry(lh, struct yaffs_obj, hash_link); + parent = obj->parent; + + if (yaffs_has_null_parent(dev, obj)) { /* These directories are not hanging */ hanging = 0; - } - else if(!parent || parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + } else if (!parent + || parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { hanging = 1; - else if(yaffs_HasNULLParent(dev,parent)) + } else if (yaffs_has_null_parent(dev, parent)) { hanging = 0; - else { + } else { /* * Need to follow the parent chain to see if it is hanging. */ hanging = 0; - depthLimit=100; + depth_limit = 100; - while(parent != dev->rootDir && - parent->parent && - parent->parent->variantType == YAFFS_OBJECT_TYPE_DIRECTORY && - depthLimit > 0){ + while (parent != dev->root_dir && + parent->parent && + parent->parent->variant_type == + YAFFS_OBJECT_TYPE_DIRECTORY + && depth_limit > 0) { parent = parent->parent; - depthLimit--; + depth_limit--; } - if(parent != dev->rootDir) + if (parent != dev->root_dir) hanging = 1; } - if(hanging){ - T(YAFFS_TRACE_SCAN, - (TSTR("Hanging object %d moved to lost and found" TENDSTR), - obj->objectId)); - yaffs_AddObjectToDirectory(dev->lostNFoundDir,obj); + if (hanging) { + yaffs_trace(YAFFS_TRACE_SCAN, + "Hanging object %d moved to lost and found", + obj->obj_id); + yaffs_add_obj_to_dir(dev->lost_n_found, + obj); } } } } } - /* * Delete directory contents for cleaning up lost and found. */ -static void yaffs_DeleteDirectoryContents(yaffs_Object *dir) +static void yaffs_del_dir_contents(struct yaffs_obj *dir) { - yaffs_Object *obj; - struct ylist_head *lh; - struct ylist_head *n; + struct yaffs_obj *obj; + struct list_head *lh; + struct list_head *n; - if(dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) + if (dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) YBUG(); - - ylist_for_each_safe(lh, n, &dir->variant.directoryVariant.children) { + + list_for_each_safe(lh, n, &dir->variant.dir_variant.children) { if (lh) { - obj = ylist_entry(lh, yaffs_Object, siblings); - if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) - yaffs_DeleteDirectoryContents(obj); + obj = list_entry(lh, struct yaffs_obj, siblings); + if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) + yaffs_del_dir_contents(obj); - T(YAFFS_TRACE_SCAN, - (TSTR("Deleting lost_found object %d" TENDSTR), - obj->objectId)); + yaffs_trace(YAFFS_TRACE_SCAN, + "Deleting lost_found object %d", + obj->obj_id); /* Need to use UnlinkObject since Delete would not handle * hardlinked objects correctly. */ - yaffs_UnlinkObject(obj); + yaffs_unlink_obj(obj); } } - -} -static void yaffs_EmptyLostAndFound(yaffs_Device *dev) -{ - yaffs_DeleteDirectoryContents(dev->lostNFoundDir); } -static int yaffs_Scan(yaffs_Device *dev) +static void yaffs_empty_l_n_f(struct yaffs_dev *dev) { - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int result; - - int chunk; - int c; - int deleted; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - __u32 sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - - int alloc_failed = 0; - - struct yaffs_ShadowFixerStruct *shadowFixerList = NULL; - - - __u8 *chunkData; - - - - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan starts intstartblk %d intendblk %d..." TENDSTR), - dev->internalStartBlock, dev->internalEndBlock)); - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - /* Scan all the blocks to determine their state */ - bi = dev->blockInfo; - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK) - bi->blockState = state = YAFFS_BLOCK_STATE_DEAD; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->param.nChunksPerBlock; - } - bi++; - } - - startIterator = dev->internalStartBlock; - endIterator = dev->internalEndBlock; - - /* For each block.... */ - for (blockIterator = startIterator; !alloc_failed && blockIterator <= endIterator; - blockIterator++) { - - YYIELD(); - - YYIELD(); - - blk = blockIterator; - - bi = yaffs_GetBlockInfo(dev, blk); - state = bi->blockState; - - deleted = 0; - - /* For each chunk in each block that needs scanning....*/ - for (c = 0; !alloc_failed && c < dev->param.nChunksPerBlock && - state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { - /* Read the tags and decide what to do */ - chunk = blk * dev->param.nChunksPerBlock + c; - - result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED || tags.chunkDeleted) { - /* YAFFS1 only... - * A deleted chunk - */ - deleted++; - dev->nFreeChunks++; - /*T((" %d %d deleted\n",blk,c)); */ - } else if (!tags.chunkUsed) { - /* An unassigned chunk in the block - * This means that either the block is empty or - * this is the one being allocated from - */ - - if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - /* this is the block being allocated from */ - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" TENDSTR), - blk, c)); - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - /* Set block finder here to encourage the allocator to go forth from here. */ - - } - - dev->nFreeChunks += (dev->param.nChunksPerBlock - c); - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - /* PutChunkIntoFile checks for a clash (two data chunks with - * the same chunkId). - */ - - if (!in) - alloc_failed = 1; - - if (in) { - if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, 1)) - alloc_failed = 1; - } - - endpos = - (tags.chunkId - 1) * dev->nDataBytesPerChunk + - tags.byteCount; - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && in->variant.fileVariant.scannedFileSize < - endpos) { - in->variant.fileVariant. - scannedFileSize = endpos; - if (!dev->param.useHeaderFileSize) { - in->variant.fileVariant. - fileSize = - in->variant.fileVariant. - scannedFileSize; - } - - } - /* T((" %d %d data %d %d\n",blk,c,tags.objectId,tags.chunkId)); */ - } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - in = yaffs_FindObjectByNumber(dev, - tags.objectId); - if (in && in->variantType != oh->type) { - /* This should not happen, but somehow - * Wev'e ended up with an objectId that has been reused but not yet - * deleted, and worse still it has changed type. Delete the old object. - */ - - yaffs_DeleteObject(in); - - in = 0; - } - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - oh->type); - - if (!in) - alloc_failed = 1; - - if (in && oh->shadowsObject > 0) { - - struct yaffs_ShadowFixerStruct *fixer; - fixer = YMALLOC(sizeof(struct yaffs_ShadowFixerStruct)); - if (fixer) { - fixer->next = shadowFixerList; - shadowFixerList = fixer; - fixer->objectId = tags.objectId; - fixer->shadowedId = oh->shadowsObject; - } - - } - - if (in && in->valid) { - /* We have already filled this one. We have a duplicate and need to resolve it. */ - - unsigned existingSerial = in->serial; - unsigned newSerial = tags.serialNumber; - - if (((existingSerial + 1) & 3) == newSerial) { - /* Use new one - destroy the exisiting one */ - yaffs_DeleteChunk(dev, - in->hdrChunk, - 1, __LINE__); - in->valid = 0; - } else { - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, - __LINE__); - } - } - - if (in && !in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->hdrChunk = chunk; - in->serial = tags.serialNumber; - - } else if (in && !in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - in->hdrChunk = chunk; - in->serial = tags.serialNumber; - - yaffs_SetObjectName(in, oh->name); - in->dirty = 0; - - /* directory stuff... - * hook up to parent - */ - - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - if (!parent) - alloc_failed = 1; - if (parent && parent->variantType == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variantType = - YAFFS_OBJECT_TYPE_DIRECTORY; - YINIT_LIST_HEAD(&parent->variant. - directoryVariant. - children); - } else if (!parent || parent->variantType != - YAFFS_OBJECT_TYPE_DIRECTORY) { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - if (0 && (parent == dev->deletedDir || - parent == dev->unlinkedDir)) { - in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ - dev->nDeletedFiles++; - } - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run through this - * list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - if (dev->param.useHeaderFileSize) - - in->variant.fileVariant. - fileSize = - oh->fileSize; - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - in->variant.hardLinkVariant. - equivalentObjectId = - oh->equivalentObjectId; - in->hardLinks.next = - (struct ylist_head *) - hardList; - hardList = in; - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - if (!in->variant.symLinkVariant.alias) - alloc_failed = 1; - break; - } - - } - } - } - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated.*/ - state = YAFFS_BLOCK_STATE_FULL; - } - - if (state == YAFFS_BLOCK_STATE_ALLOCATING) { - /* If the block was partially allocated then treat it as fully allocated.*/ - state = YAFFS_BLOCK_STATE_FULL; - dev->allocationBlock = -1; - } - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - - yaffs_HardlinkFixup(dev, hardList); - - /* Fix up any shadowed objects */ - { - struct yaffs_ShadowFixerStruct *fixer; - yaffs_Object *obj; - - while (shadowFixerList) { - fixer = shadowFixerList; - shadowFixerList = fixer->next; - /* Complete the rename transaction by deleting the shadowed object - * then setting the object header to unshadowed. - */ - obj = yaffs_FindObjectByNumber(dev, fixer->shadowedId); - if (obj) - yaffs_DeleteObject(obj); - - obj = yaffs_FindObjectByNumber(dev, fixer->objectId); - - if (obj) - yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0); - - YFREE(fixer); - } - } - - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if (alloc_failed) - return YAFFS_FAIL; - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_Scan ends" TENDSTR))); - - - return YAFFS_OK; + yaffs_del_dir_contents(dev->lost_n_found); } -static void yaffs_CheckObjectDetailsLoaded(yaffs_Object *in) -{ - __u8 *chunkData; - yaffs_ObjectHeader *oh; - yaffs_Device *dev; - yaffs_ExtendedTags tags; - int result; - int alloc_failed = 0; - - if (!in) - return; - - dev = in->myDev; - -#if 0 - T(YAFFS_TRACE_SCAN, (TSTR("details for object %d %s loaded" TENDSTR), - in->objectId, - in->lazyLoaded ? "not yet" : "already")); -#endif - - if (in->lazyLoaded && in->hdrChunk > 0) { - in->lazyLoaded = 0; - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - result = yaffs_ReadChunkWithTagsFromNAND(dev, in->hdrChunk, chunkData, &tags); - oh = (yaffs_ObjectHeader *) chunkData; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - yaffs_SetObjectName(in, oh->name); - - if (in->variantType == YAFFS_OBJECT_TYPE_SYMLINK) { - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - if (!in->variant.symLinkVariant.alias) - alloc_failed = 1; /* Not returned to caller */ - } - - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - } -} -static int yaffs_ScanBackwards(yaffs_Device *dev) -{ - yaffs_ExtendedTags tags; - int blk; - int blockIterator; - int startIterator; - int endIterator; - int nBlocksToScan = 0; - - int chunk; - int result; - int c; - int deleted; - yaffs_BlockState state; - yaffs_Object *hardList = NULL; - yaffs_BlockInfo *bi; - __u32 sequenceNumber; - yaffs_ObjectHeader *oh; - yaffs_Object *in; - yaffs_Object *parent; - int nBlocks = dev->internalEndBlock - dev->internalStartBlock + 1; - int itsUnlinked; - __u8 *chunkData; - - int fileSize; - int isShrink; - int foundChunksInBlock; - int equivalentObjectId; - int alloc_failed = 0; - - - yaffs_BlockIndex *blockIndex = NULL; - int altBlockIndex = 0; - - if (!dev->param.isYaffs2) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_ScanBackwards is only for YAFFS2!" TENDSTR))); - return YAFFS_FAIL; - } - - T(YAFFS_TRACE_SCAN, - (TSTR - ("yaffs_ScanBackwards starts intstartblk %d intendblk %d..." - TENDSTR), dev->internalStartBlock, dev->internalEndBlock)); - - - dev->sequenceNumber = YAFFS_LOWEST_SEQUENCE_NUMBER; - - blockIndex = YMALLOC(nBlocks * sizeof(yaffs_BlockIndex)); - - if (!blockIndex) { - blockIndex = YMALLOC_ALT(nBlocks * sizeof(yaffs_BlockIndex)); - altBlockIndex = 1; - } - - if (!blockIndex) { - T(YAFFS_TRACE_SCAN, - (TSTR("yaffs_Scan() could not allocate block index!" TENDSTR))); - return YAFFS_FAIL; - } - - dev->blocksInCheckpoint = 0; - - chunkData = yaffs_GetTempBuffer(dev, __LINE__); - - /* Scan all the blocks to determine their state */ - bi = dev->blockInfo; - for (blk = dev->internalStartBlock; blk <= dev->internalEndBlock; blk++) { - yaffs_ClearChunkBits(dev, blk); - bi->pagesInUse = 0; - bi->softDeletions = 0; - - yaffs_QueryInitialBlockState(dev, blk, &state, &sequenceNumber); - - bi->blockState = state; - bi->sequenceNumber = sequenceNumber; - - if (bi->sequenceNumber == YAFFS_SEQUENCE_CHECKPOINT_DATA) - bi->blockState = state = YAFFS_BLOCK_STATE_CHECKPOINT; - if (bi->sequenceNumber == YAFFS_SEQUENCE_BAD_BLOCK) - bi->blockState = state = YAFFS_BLOCK_STATE_DEAD; - - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block scanning block %d state %d seq %d" TENDSTR), blk, - state, sequenceNumber)); - - - if (state == YAFFS_BLOCK_STATE_CHECKPOINT) { - dev->blocksInCheckpoint++; - - } else if (state == YAFFS_BLOCK_STATE_DEAD) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is bad" TENDSTR), blk)); - } else if (state == YAFFS_BLOCK_STATE_EMPTY) { - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("Block empty " TENDSTR))); - dev->nErasedBlocks++; - dev->nFreeChunks += dev->param.nChunksPerBlock; - } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - - /* Determine the highest sequence number */ - if (sequenceNumber >= YAFFS_LOWEST_SEQUENCE_NUMBER && - sequenceNumber < YAFFS_HIGHEST_SEQUENCE_NUMBER) { - - blockIndex[nBlocksToScan].seq = sequenceNumber; - blockIndex[nBlocksToScan].block = blk; - - nBlocksToScan++; - - if (sequenceNumber >= dev->sequenceNumber) - dev->sequenceNumber = sequenceNumber; - } else { - /* TODO: Nasty sequence number! */ - T(YAFFS_TRACE_SCAN, - (TSTR - ("Block scanning block %d has bad sequence number %d" - TENDSTR), blk, sequenceNumber)); - - } - } - bi++; - } - - T(YAFFS_TRACE_SCAN, - (TSTR("%d blocks to be sorted..." TENDSTR), nBlocksToScan)); - - - - YYIELD(); - - /* Sort the blocks */ -#ifndef CONFIG_YAFFS_USE_OWN_SORT - { - /* Use qsort now. */ - yaffs_qsort(blockIndex, nBlocksToScan, sizeof(yaffs_BlockIndex), ybicmp); - } -#else - { - /* Dungy old bubble sort... */ - - yaffs_BlockIndex temp; - int i; - int j; - - for (i = 0; i < nBlocksToScan; i++) - for (j = i + 1; j < nBlocksToScan; j++) - if (blockIndex[i].seq > blockIndex[j].seq) { - temp = blockIndex[j]; - blockIndex[j] = blockIndex[i]; - blockIndex[i] = temp; - } - } -#endif - - YYIELD(); - - T(YAFFS_TRACE_SCAN, (TSTR("...done" TENDSTR))); - - /* Now scan the blocks looking at the data. */ - startIterator = 0; - endIterator = nBlocksToScan - 1; - T(YAFFS_TRACE_SCAN_DEBUG, - (TSTR("%d blocks to be scanned" TENDSTR), nBlocksToScan)); - - /* For each block.... backwards */ - for (blockIterator = endIterator; !alloc_failed && blockIterator >= startIterator; - blockIterator--) { - /* Cooperative multitasking! This loop can run for so - long that watchdog timers expire. */ - YYIELD(); - - /* get the block to scan in the correct order */ - blk = blockIndex[blockIterator].block; - - bi = yaffs_GetBlockInfo(dev, blk); - - - state = bi->blockState; - - deleted = 0; - - /* For each chunk in each block that needs scanning.... */ - foundChunksInBlock = 0; - for (c = dev->param.nChunksPerBlock - 1; - !alloc_failed && c >= 0 && - (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { - /* Scan backwards... - * Read the tags and decide what to do - */ - - chunk = blk * dev->param.nChunksPerBlock + c; - - result = yaffs_ReadChunkWithTagsFromNAND(dev, chunk, NULL, - &tags); - - /* Let's have a good look at this chunk... */ - - if (!tags.chunkUsed) { - /* An unassigned chunk in the block. - * If there are used chunks after this one, then - * it is a chunk that was skipped due to failing the erased - * check. Just skip it so that it can be deleted. - * But, more typically, We get here when this is an unallocated - * chunk and his means that either the block is empty or - * this is the one being allocated from - */ - - if (foundChunksInBlock) { - /* This is a chunk that was skipped due to failing the erased check */ - } else if (c == 0) { - /* We're looking at the first chunk in the block so the block is unused */ - state = YAFFS_BLOCK_STATE_EMPTY; - dev->nErasedBlocks++; - } else { - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || - state == YAFFS_BLOCK_STATE_ALLOCATING) { - if (dev->sequenceNumber == bi->sequenceNumber) { - /* this is the block being allocated from */ - - T(YAFFS_TRACE_SCAN, - (TSTR - (" Allocating from %d %d" - TENDSTR), blk, c)); - - state = YAFFS_BLOCK_STATE_ALLOCATING; - dev->allocationBlock = blk; - dev->allocationPage = c; - dev->allocationBlockFinder = blk; - } else { - /* This is a partially written block that is not - * the current allocation block. - */ - - T(YAFFS_TRACE_SCAN, - (TSTR("Partially written block %d detected" TENDSTR), - blk)); - } - } - } - - dev->nFreeChunks++; - - } else if (tags.eccResult == YAFFS_ECC_RESULT_UNFIXED) { - T(YAFFS_TRACE_SCAN, - (TSTR(" Unfixed ECC in chunk(%d:%d), chunk ignored"TENDSTR), - blk, c)); - - dev->nFreeChunks++; - - } else if (tags.chunkId > 0) { - /* chunkId > 0 so it is a data chunk... */ - unsigned int endpos; - __u32 chunkBase = - (tags.chunkId - 1) * dev->nDataBytesPerChunk; - - foundChunksInBlock = 1; - - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - in = yaffs_FindOrCreateObjectByNumber(dev, - tags. - objectId, - YAFFS_OBJECT_TYPE_FILE); - if (!in) { - /* Out of memory */ - alloc_failed = 1; - } - - if (in && - in->variantType == YAFFS_OBJECT_TYPE_FILE - && chunkBase < in->variant.fileVariant.shrinkSize) { - /* This has not been invalidated by a resize */ - if (!yaffs_PutChunkIntoFile(in, tags.chunkId, chunk, -1)) { - alloc_failed = 1; - } - - /* File size is calculated by looking at the data chunks if we have not - * seen an object header yet. Stop this practice once we find an object header. - */ - endpos = chunkBase + tags.byteCount; - - if (!in->valid && /* have not got an object header yet */ - in->variant.fileVariant.scannedFileSize < endpos) { - in->variant.fileVariant.scannedFileSize = endpos; - in->variant.fileVariant.fileSize = endpos; - } - - } else if (in) { - /* This chunk has been invalidated by a resize, or a past file deletion - * so delete the chunk*/ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - - } - } else { - /* chunkId == 0, so it is an ObjectHeader. - * Thus, we read in the object header and make the object - */ - foundChunksInBlock = 1; - - yaffs_SetChunkBit(dev, blk, c); - bi->pagesInUse++; - - oh = NULL; - in = NULL; - - if (tags.extraHeaderInfoAvailable) { - in = yaffs_FindOrCreateObjectByNumber(dev, - tags.objectId, - tags.extraObjectType); - if (!in) - alloc_failed = 1; - } - - if (!in || - (!in->valid && dev->param.disableLazyLoad) || - tags.extraShadows || - (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == YAFFS_OBJECTID_LOSTNFOUND))) { - - /* If we don't have valid info then we need to read the chunk - * TODO In future we can probably defer reading the chunk and - * living with invalid data until needed. - */ - - result = yaffs_ReadChunkWithTagsFromNAND(dev, - chunk, - chunkData, - NULL); - - oh = (yaffs_ObjectHeader *) chunkData; - - if (dev->param.inbandTags) { - /* Fix up the header if they got corrupted by inband tags */ - oh->shadowsObject = oh->inbandShadowsObject; - oh->isShrink = oh->inbandIsShrink; - } - - if (!in) { - in = yaffs_FindOrCreateObjectByNumber(dev, tags.objectId, oh->type); - if (!in) - alloc_failed = 1; - } - - } - - if (!in) { - /* TODO Hoosterman we have a problem! */ - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: Could not make object for object %d at chunk %d during scan" - TENDSTR), tags.objectId, chunk)); - continue; - } - - if (in->valid) { - /* We have already filled this one. - * We have a duplicate that will be discarded, but - * we first have to suck out resize info if it is a file. - */ - - if ((in->variantType == YAFFS_OBJECT_TYPE_FILE) && - ((oh && - oh->type == YAFFS_OBJECT_TYPE_FILE) || - (tags.extraHeaderInfoAvailable && - tags.extraObjectType == YAFFS_OBJECT_TYPE_FILE))) { - __u32 thisSize = - (oh) ? oh->fileSize : tags. - extraFileLength; - __u32 parentObjectId = - (oh) ? oh-> - parentObjectId : tags. - extraParentObjectId; - - - isShrink = - (oh) ? oh->isShrink : tags. - extraIsShrinkHeader; - - /* If it is deleted (unlinked at start also means deleted) - * we treat the file size as being zeroed at this point. - */ - if (parentObjectId == - YAFFS_OBJECTID_DELETED - || parentObjectId == - YAFFS_OBJECTID_UNLINKED) { - thisSize = 0; - isShrink = 1; - } - - if (isShrink && in->variant.fileVariant.shrinkSize > thisSize) - in->variant.fileVariant.shrinkSize = thisSize; - - if (isShrink) - bi->hasShrinkHeader = 1; - - } - /* Use existing - destroy this one. */ - yaffs_DeleteChunk(dev, chunk, 1, __LINE__); - - } - - if (!in->valid && in->variantType != - (oh ? oh->type : tags.extraObjectType)) - T(YAFFS_TRACE_ERROR, ( - TSTR("yaffs tragedy: Bad object type, " - TCONT("%d != %d, for object %d at chunk ") - TCONT("%d during scan") - TENDSTR), oh ? - oh->type : tags.extraObjectType, - in->variantType, tags.objectId, - chunk)); - - if (!in->valid && - (tags.objectId == YAFFS_OBJECTID_ROOT || - tags.objectId == - YAFFS_OBJECTID_LOSTNFOUND)) { - /* We only load some info, don't fiddle with directory structure */ - in->valid = 1; - - if (oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; - -#endif - } else { - in->variantType = tags.extraObjectType; - in->lazyLoaded = 1; - } - - in->hdrChunk = chunk; - - } else if (!in->valid) { - /* we need to load this info */ - - in->valid = 1; - in->hdrChunk = chunk; - - if (oh) { - in->variantType = oh->type; - - in->yst_mode = oh->yst_mode; -#ifdef CONFIG_YAFFS_WINCE - in->win_atime[0] = oh->win_atime[0]; - in->win_ctime[0] = oh->win_ctime[0]; - in->win_mtime[0] = oh->win_mtime[0]; - in->win_atime[1] = oh->win_atime[1]; - in->win_ctime[1] = oh->win_ctime[1]; - in->win_mtime[1] = oh->win_mtime[1]; -#else - in->yst_uid = oh->yst_uid; - in->yst_gid = oh->yst_gid; - in->yst_atime = oh->yst_atime; - in->yst_mtime = oh->yst_mtime; - in->yst_ctime = oh->yst_ctime; - in->yst_rdev = oh->yst_rdev; -#endif - - if (oh->shadowsObject > 0) - yaffs_HandleShadowedObject(dev, - oh-> - shadowsObject, - 1); - - - - yaffs_SetObjectName(in, oh->name); - parent = - yaffs_FindOrCreateObjectByNumber - (dev, oh->parentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - - fileSize = oh->fileSize; - isShrink = oh->isShrink; - equivalentObjectId = oh->equivalentObjectId; - - } else { - in->variantType = tags.extraObjectType; - parent = - yaffs_FindOrCreateObjectByNumber - (dev, tags.extraParentObjectId, - YAFFS_OBJECT_TYPE_DIRECTORY); - fileSize = tags.extraFileLength; - isShrink = tags.extraIsShrinkHeader; - equivalentObjectId = tags.extraEquivalentObjectId; - in->lazyLoaded = 1; - - } - in->dirty = 0; - - if (!parent) - alloc_failed = 1; - - /* directory stuff... - * hook up to parent - */ - - if (parent && parent->variantType == - YAFFS_OBJECT_TYPE_UNKNOWN) { - /* Set up as a directory */ - parent->variantType = - YAFFS_OBJECT_TYPE_DIRECTORY; - YINIT_LIST_HEAD(&parent->variant. - directoryVariant. - children); - } else if (!parent || parent->variantType != - YAFFS_OBJECT_TYPE_DIRECTORY) { - /* Hoosterman, another problem.... - * We're trying to use a non-directory as a directory - */ - - T(YAFFS_TRACE_ERROR, - (TSTR - ("yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." - TENDSTR))); - parent = dev->lostNFoundDir; - } - - yaffs_AddObjectToDirectory(parent, in); - - itsUnlinked = (parent == dev->deletedDir) || - (parent == dev->unlinkedDir); - - if (isShrink) { - /* Mark the block as having a shrinkHeader */ - bi->hasShrinkHeader = 1; - } - - /* Note re hardlinks. - * Since we might scan a hardlink before its equivalent object is scanned - * we put them all in a list. - * After scanning is complete, we should have all the objects, so we run - * through this list and fix up all the chains. - */ - - switch (in->variantType) { - case YAFFS_OBJECT_TYPE_UNKNOWN: - /* Todo got a problem */ - break; - case YAFFS_OBJECT_TYPE_FILE: - - if (in->variant.fileVariant. - scannedFileSize < fileSize) { - /* This covers the case where the file size is greater - * than where the data is - * This will happen if the file is resized to be larger - * than its current data extents. - */ - in->variant.fileVariant.fileSize = fileSize; - in->variant.fileVariant.scannedFileSize = fileSize; - } - - if (in->variant.fileVariant.shrinkSize > fileSize) - in->variant.fileVariant.shrinkSize = fileSize; - - - break; - case YAFFS_OBJECT_TYPE_HARDLINK: - if (!itsUnlinked) { - in->variant.hardLinkVariant.equivalentObjectId = - equivalentObjectId; - in->hardLinks.next = - (struct ylist_head *) hardList; - hardList = in; - } - break; - case YAFFS_OBJECT_TYPE_DIRECTORY: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SPECIAL: - /* Do nothing */ - break; - case YAFFS_OBJECT_TYPE_SYMLINK: - if (oh) { - in->variant.symLinkVariant.alias = - yaffs_CloneString(oh->alias); - if (!in->variant.symLinkVariant.alias) - alloc_failed = 1; - } - break; - } - - } - - } - - } /* End of scanning for each chunk */ - - if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { - /* If we got this far while scanning, then the block is fully allocated. */ - state = YAFFS_BLOCK_STATE_FULL; - } - - - bi->blockState = state; - - /* Now let's see if it was dirty */ - if (bi->pagesInUse == 0 && - !bi->hasShrinkHeader && - bi->blockState == YAFFS_BLOCK_STATE_FULL) { - yaffs_BlockBecameDirty(dev, blk); - } - - } - - yaffs_SkipRestOfBlock(dev); - - if (altBlockIndex) - YFREE_ALT(blockIndex); - else - YFREE(blockIndex); - - /* Ok, we've done all the scanning. - * Fix up the hard link chains. - * We should now have scanned all the objects, now it's time to add these - * hardlinks. - */ - yaffs_HardlinkFixup(dev, hardList); - - - yaffs_ReleaseTempBuffer(dev, chunkData, __LINE__); - - if (alloc_failed) - return YAFFS_FAIL; - - T(YAFFS_TRACE_SCAN, (TSTR("yaffs_ScanBackwards ends" TENDSTR))); - - return YAFFS_OK; -} - -/*------------------------------ Directory Functions ----------------------------- */ - -static void yaffs_VerifyObjectInDirectory(yaffs_Object *obj) -{ - struct ylist_head *lh; - yaffs_Object *listObj; - - int count = 0; - - if (!obj) { - T(YAFFS_TRACE_ALWAYS, (TSTR("No object to verify" TENDSTR))); - YBUG(); - return; - } - - if (yaffs_SkipVerification(obj->myDev)) - return; - - if (!obj->parent) { - T(YAFFS_TRACE_ALWAYS, (TSTR("Object does not have parent" TENDSTR))); - YBUG(); - return; - } - - if (obj->parent->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, (TSTR("Parent is not directory" TENDSTR))); - YBUG(); - } - - /* Iterate through the objects in each hash entry */ - - ylist_for_each(lh, &obj->parent->variant.directoryVariant.children) { - if (lh) { - listObj = ylist_entry(lh, yaffs_Object, siblings); - yaffs_VerifyObject(listObj); - if (obj == listObj) - count++; - } - } - - if (count != 1) { - T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory %d times" TENDSTR), count)); - YBUG(); - } -} - -static void yaffs_VerifyDirectory(yaffs_Object *directory) -{ - struct ylist_head *lh; - yaffs_Object *listObj; - - if (!directory) { - YBUG(); - return; - } - - if (yaffs_SkipFullVerification(directory->myDev)) - return; - - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, (TSTR("Directory has wrong type: %d" TENDSTR), directory->variantType)); - YBUG(); - } - - /* Iterate through the objects in each hash entry */ - - ylist_for_each(lh, &directory->variant.directoryVariant.children) { - if (lh) { - listObj = ylist_entry(lh, yaffs_Object, siblings); - if (listObj->parent != directory) { - T(YAFFS_TRACE_ALWAYS, (TSTR("Object in directory list has wrong parent %p" TENDSTR), listObj->parent)); - YBUG(); - } - yaffs_VerifyObjectInDirectory(listObj); - } - } -} - -/* - *yaffs_UpdateParent() handles fixing a directories mtime and ctime when a new - * link (ie. name) is created or deleted in the directory. - * - * ie. - * create dir/a : update dir's mtime/ctime - * rm dir/a: update dir's mtime/ctime - * modify dir/a: don't update dir's mtimme/ctime - * - * This can be handled immediately or defered. Defering helps reduce the number - * of updates when many files in a directory are changed within a brief period. - * - * If the directory updating is defered then yaffs_UpdateDirtyDirecories must be - * called periodically. - */ - -static void yaffs_UpdateParent(yaffs_Object *obj) -{ - yaffs_Device *dev; - if(!obj) - return; - - dev = obj->myDev; - obj->dirty = 1; - obj->yst_mtime = obj->yst_ctime = Y_CURRENT_TIME; - if(dev->param.deferDirectoryUpdate){ - struct ylist_head *link = &obj->variant.directoryVariant.dirty; - - if(ylist_empty(link)){ - ylist_add(link,&dev->dirtyDirectories); - T(YAFFS_TRACE_BACKGROUND, (TSTR("Added object %d to dirty directories" TENDSTR),obj->objectId)); - } - - } else - yaffs_UpdateObjectHeader(obj,NULL,0,0,0); -} - -void yaffs_UpdateDirtyDirectories(yaffs_Device *dev) -{ - struct ylist_head *link; - yaffs_Object *obj; - yaffs_DirectoryStructure *dS; - yaffs_ObjectVariant *oV; - - T(YAFFS_TRACE_BACKGROUND, (TSTR("Update dirty directories" TENDSTR))); - - while(!ylist_empty(&dev->dirtyDirectories)){ - link = dev->dirtyDirectories.next; - ylist_del_init(link); - - dS=ylist_entry(link,yaffs_DirectoryStructure,dirty); - oV = ylist_entry(dS,yaffs_ObjectVariant,directoryVariant); - obj = ylist_entry(oV,yaffs_Object,variant); - - T(YAFFS_TRACE_BACKGROUND, (TSTR("Update directory %d" TENDSTR), obj->objectId)); - - if(obj->dirty) - yaffs_UpdateObjectHeader(obj,NULL,0,0,0); - } -} - -static void yaffs_RemoveObjectFromDirectory(yaffs_Object *obj) -{ - yaffs_Device *dev = obj->myDev; - yaffs_Object *parent; - - yaffs_VerifyObjectInDirectory(obj); - parent = obj->parent; - - yaffs_VerifyDirectory(parent); - - if (dev && dev->param.removeObjectCallback) - dev->param.removeObjectCallback(obj); - - - ylist_del_init(&obj->siblings); - obj->parent = NULL; - - yaffs_VerifyDirectory(parent); -} - -static void yaffs_AddObjectToDirectory(yaffs_Object *directory, - yaffs_Object *obj) -{ - if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a null pointer directory" - TENDSTR))); - YBUG(); - return; - } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: Trying to add an object to a non-directory" - TENDSTR))); - YBUG(); - } - - if (obj->siblings.prev == NULL) { - /* Not initialised */ - YBUG(); - } - - - yaffs_VerifyDirectory(directory); - - yaffs_RemoveObjectFromDirectory(obj); - - - /* Now add it */ - ylist_add(&obj->siblings, &directory->variant.directoryVariant.children); - obj->parent = directory; - - if (directory == obj->myDev->unlinkedDir - || directory == obj->myDev->deletedDir) { - obj->unlinked = 1; - obj->myDev->nUnlinkedFiles++; - obj->renameAllowed = 0; - } - - yaffs_VerifyDirectory(directory); - yaffs_VerifyObjectInDirectory(obj); -} - -yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory, - const YCHAR *name) +struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *directory, + const YCHAR * name) { int sum; - struct ylist_head *i; + struct list_head *i; YCHAR buffer[YAFFS_MAX_NAME_LENGTH + 1]; - yaffs_Object *l; + struct yaffs_obj *l; if (!name) return NULL; if (!directory) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: null pointer directory" + ); YBUG(); return NULL; } - if (directory->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "tragedy: yaffs_find_by_name: non-directory" + ); YBUG(); } - sum = yaffs_CalcNameSum(name); + sum = yaffs_calc_name_sum(name); - ylist_for_each(i, &directory->variant.directoryVariant.children) { + list_for_each(i, &directory->variant.dir_variant.children) { if (i) { - l = ylist_entry(i, yaffs_Object, siblings); + l = list_entry(i, struct yaffs_obj, siblings); if (l->parent != directory) YBUG(); - yaffs_CheckObjectDetailsLoaded(l); + yaffs_check_obj_details_loaded(l); /* Special case for lost-n-found */ - if (l->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - if (yaffs_strcmp(name, YAFFS_LOSTNFOUND_NAME) == 0) + if (l->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + if (!strcmp(name, YAFFS_LOSTNFOUND_NAME)) return l; - } else if (yaffs_SumCompare(l->sum, sum) || l->hdrChunk <= 0) { + } else if (l->sum == sum + || l->hdr_chunk <= 0) { /* LostnFound chunk called Objxxx * Do a real check */ - yaffs_GetObjectName(l, buffer, - YAFFS_MAX_NAME_LENGTH + 1); - if (yaffs_strncmp(name, buffer, YAFFS_MAX_NAME_LENGTH) == 0) + yaffs_get_obj_name(l, buffer, + YAFFS_MAX_NAME_LENGTH + 1); + if (strncmp + (name, buffer, YAFFS_MAX_NAME_LENGTH) == 0) return l; } } @@ -7462,151 +4525,143 @@ yaffs_Object *yaffs_FindObjectByName(yaffs_Object *directory, return NULL; } - -#if 0 -int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir, - int (*fn) (yaffs_Object *)) -{ - struct ylist_head *i; - yaffs_Object *l; - - if (!theDir) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: null pointer directory" - TENDSTR))); - YBUG(); - return YAFFS_FAIL; - } - if (theDir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY) { - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("tragedy: yaffs_FindObjectByName: non-directory" TENDSTR))); - YBUG(); - return YAFFS_FAIL; - } - - ylist_for_each(i, &theDir->variant.directoryVariant.children) { - if (i) { - l = ylist_entry(i, yaffs_Object, siblings); - if (l && !fn(l)) - return YAFFS_FAIL; - } - } - - return YAFFS_OK; - -} -#endif - /* GetEquivalentObject dereferences any hard links to get to the * actual object. */ -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj) +struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj) { - if (obj && obj->variantType == YAFFS_OBJECT_TYPE_HARDLINK) { + if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) { /* We want the object id of the equivalent object, not this one */ - obj = obj->variant.hardLinkVariant.equivalentObject; - yaffs_CheckObjectDetailsLoaded(obj); + obj = obj->variant.hardlink_variant.equiv_obj; + yaffs_check_obj_details_loaded(obj); } return obj; } -int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize) -{ - memset(name, 0, buffSize * sizeof(YCHAR)); - - yaffs_CheckObjectDetailsLoaded(obj); +/* + * A note or two on object names. + * * If the object name is missing, we then make one up in the form objnnn + * + * * ASCII names are stored in the object header's name field from byte zero + * * Unicode names are historically stored starting from byte zero. + * + * Then there are automatic Unicode names... + * The purpose of these is to save names in a way that can be read as + * ASCII or Unicode names as appropriate, thus allowing a Unicode and ASCII + * system to share files. + * + * These automatic unicode are stored slightly differently... + * - If the name can fit in the ASCII character space then they are saved as + * ascii names as per above. + * - If the name needs Unicode then the name is saved in Unicode + * starting at oh->name[1]. - if (obj->objectId == YAFFS_OBJECTID_LOSTNFOUND) { - yaffs_strncpy(name, YAFFS_LOSTNFOUND_NAME, buffSize - 1); - } else if (obj->hdrChunk <= 0) { - YCHAR locName[20]; - YCHAR numString[20]; - YCHAR *x = &numString[19]; - unsigned v = obj->objectId; - numString[19] = 0; + */ +static void yaffs_fix_null_name(struct yaffs_obj *obj, YCHAR * name, + int buffer_size) +{ + /* Create an object name if we could not find one. */ + if (strnlen(name, YAFFS_MAX_NAME_LENGTH) == 0) { + YCHAR local_name[20]; + YCHAR num_string[20]; + YCHAR *x = &num_string[19]; + unsigned v = obj->obj_id; + num_string[19] = 0; while (v > 0) { x--; *x = '0' + (v % 10); v /= 10; } /* make up a name */ - yaffs_strcpy(locName, YAFFS_LOSTNFOUND_PREFIX); - yaffs_strcat(locName, x); - yaffs_strncpy(name, locName, buffSize - 1); + strcpy(local_name, YAFFS_LOSTNFOUND_PREFIX); + strcat(local_name, x); + strncpy(name, local_name, buffer_size - 1); + } +} +int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size) +{ + memset(name, 0, buffer_size * sizeof(YCHAR)); + + yaffs_check_obj_details_loaded(obj); + + if (obj->obj_id == YAFFS_OBJECTID_LOSTNFOUND) { + strncpy(name, YAFFS_LOSTNFOUND_NAME, buffer_size - 1); + } +#ifndef CONFIG_YAFFS_NO_SHORT_NAMES + else if (obj->short_name[0]) { + strcpy(name, obj->short_name); } -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - else if (obj->shortName[0]) - yaffs_strncpy(name, obj->shortName,YAFFS_SHORT_NAME_LENGTH+1); #endif - else { + else if (obj->hdr_chunk > 0) { int result; - __u8 *buffer = yaffs_GetTempBuffer(obj->myDev, __LINE__); + u8 *buffer = yaffs_get_temp_buffer(obj->my_dev, __LINE__); - yaffs_ObjectHeader *oh = (yaffs_ObjectHeader *) buffer; + struct yaffs_obj_hdr *oh = (struct yaffs_obj_hdr *)buffer; - memset(buffer, 0, obj->myDev->nDataBytesPerChunk); + memset(buffer, 0, obj->my_dev->data_bytes_per_chunk); - if (obj->hdrChunk > 0) { - result = yaffs_ReadChunkWithTagsFromNAND(obj->myDev, - obj->hdrChunk, buffer, - NULL); + if (obj->hdr_chunk > 0) { + result = yaffs_rd_chunk_tags_nand(obj->my_dev, + obj->hdr_chunk, + buffer, NULL); } - yaffs_strncpy(name, oh->name, buffSize - 1); - name[buffSize-1]=0; + yaffs_load_name_from_oh(obj->my_dev, name, oh->name, + buffer_size); - yaffs_ReleaseTempBuffer(obj->myDev, buffer, __LINE__); + yaffs_release_temp_buffer(obj->my_dev, buffer, __LINE__); } - return yaffs_strnlen(name,buffSize-1); + yaffs_fix_null_name(obj, name, buffer_size); + + return strnlen(name, YAFFS_MAX_NAME_LENGTH); } -int yaffs_GetObjectFileLength(yaffs_Object *obj) +int yaffs_get_obj_length(struct yaffs_obj *obj) { /* Dereference any hard linking */ - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - if (obj->variantType == YAFFS_OBJECT_TYPE_FILE) - return obj->variant.fileVariant.fileSize; - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){ - if(!obj->variant.symLinkVariant.alias) + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) + return obj->variant.file_variant.file_size; + if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) { + if (!obj->variant.symlink_variant.alias) return 0; - return yaffs_strnlen(obj->variant.symLinkVariant.alias,YAFFS_MAX_ALIAS_LENGTH); + return strnlen(obj->variant.symlink_variant.alias, + YAFFS_MAX_ALIAS_LENGTH); } else { /* Only a directory should drop through to here */ - return obj->myDev->nDataBytesPerChunk; + return obj->my_dev->data_bytes_per_chunk; } } -int yaffs_GetObjectLinkCount(yaffs_Object *obj) +int yaffs_get_obj_link_count(struct yaffs_obj *obj) { int count = 0; - struct ylist_head *i; + struct list_head *i; if (!obj->unlinked) - count++; /* the object itself */ + count++; /* the object itself */ - ylist_for_each(i, &obj->hardLinks) - count++; /* add the hard links; */ + list_for_each(i, &obj->hard_links) + count++; /* add the hard links; */ return count; } -int yaffs_GetObjectInode(yaffs_Object *obj) +int yaffs_get_obj_inode(struct yaffs_obj *obj) { - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - return obj->objectId; + return obj->obj_id; } -unsigned yaffs_GetObjectType(yaffs_Object *obj) +unsigned yaffs_get_obj_type(struct yaffs_obj *obj) { - obj = yaffs_GetEquivalentObject(obj); + obj = yaffs_get_equivalent_obj(obj); - switch (obj->variantType) { + switch (obj->variant_type) { case YAFFS_OBJECT_TYPE_FILE: return DT_REG; break; @@ -7634,296 +4689,222 @@ unsigned yaffs_GetObjectType(yaffs_Object *obj) } } -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj) +YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj) { - obj = yaffs_GetEquivalentObject(obj); - if (obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK) - return yaffs_CloneString(obj->variant.symLinkVariant.alias); + obj = yaffs_get_equivalent_obj(obj); + if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) + return yaffs_clone_str(obj->variant.symlink_variant.alias); else - return yaffs_CloneString(_Y("")); -} - -#ifndef CONFIG_YAFFS_WINCE - -int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr) -{ - unsigned int valid = attr->ia_valid; - - if (valid & ATTR_MODE) - obj->yst_mode = attr->ia_mode; - if (valid & ATTR_UID) - obj->yst_uid = attr->ia_uid; - if (valid & ATTR_GID) - obj->yst_gid = attr->ia_gid; - - if (valid & ATTR_ATIME) - obj->yst_atime = Y_TIME_CONVERT(attr->ia_atime); - if (valid & ATTR_CTIME) - obj->yst_ctime = Y_TIME_CONVERT(attr->ia_ctime); - if (valid & ATTR_MTIME) - obj->yst_mtime = Y_TIME_CONVERT(attr->ia_mtime); - - if (valid & ATTR_SIZE) - yaffs_ResizeFile(obj, attr->ia_size); - - yaffs_UpdateObjectHeader(obj, NULL, 1, 0, 0); - - return YAFFS_OK; - -} -int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr) -{ - unsigned int valid = 0; - - attr->ia_mode = obj->yst_mode; - valid |= ATTR_MODE; - attr->ia_uid = obj->yst_uid; - valid |= ATTR_UID; - attr->ia_gid = obj->yst_gid; - valid |= ATTR_GID; - - Y_TIME_CONVERT(attr->ia_atime) = obj->yst_atime; - valid |= ATTR_ATIME; - Y_TIME_CONVERT(attr->ia_ctime) = obj->yst_ctime; - valid |= ATTR_CTIME; - Y_TIME_CONVERT(attr->ia_mtime) = obj->yst_mtime; - valid |= ATTR_MTIME; - - attr->ia_size = yaffs_GetFileSize(obj); - valid |= ATTR_SIZE; - - attr->ia_valid = valid; - - return YAFFS_OK; -} - -#endif - -#if 0 -int yaffs_DumpObject(yaffs_Object *obj) -{ - YCHAR name[257]; - - yaffs_GetObjectName(obj, name, YAFFS_MAX_NAME_LENGTH + 1); - - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("Object %d, inode %d \"%s\"\n dirty %d valid %d serial %d sum %d" - " chunk %d type %d size %d\n" - TENDSTR), obj->objectId, yaffs_GetObjectInode(obj), name, - obj->dirty, obj->valid, obj->serial, obj->sum, obj->hdrChunk, - yaffs_GetObjectType(obj), yaffs_GetObjectFileLength(obj))); - - return YAFFS_OK; + return yaffs_clone_str(_Y("")); } -#endif -/*---------------------------- Initialisation code -------------------------------------- */ +/*--------------------------- Initialisation code -------------------------- */ -static int yaffs_CheckDevFunctions(const yaffs_Device *dev) +static int yaffs_check_dev_fns(const struct yaffs_dev *dev) { /* Common functions, gotta have */ - if (!dev->param.eraseBlockInNAND || !dev->param.initialiseNAND) + if (!dev->param.erase_fn || !dev->param.initialise_flash_fn) return 0; #ifdef CONFIG_YAFFS_YAFFS2 /* Can use the "with tags" style interface for yaffs1 or yaffs2 */ - if (dev->param.writeChunkWithTagsToNAND && - dev->param.readChunkWithTagsFromNAND && - !dev->param.writeChunkToNAND && - !dev->param.readChunkFromNAND && - dev->param.markNANDBlockBad && - dev->param.queryNANDBlock) + if (dev->param.write_chunk_tags_fn && + dev->param.read_chunk_tags_fn && + !dev->param.write_chunk_fn && + !dev->param.read_chunk_fn && + dev->param.bad_block_fn && dev->param.query_block_fn) return 1; #endif /* Can use the "spare" style interface for yaffs1 */ - if (!dev->param.isYaffs2 && - !dev->param.writeChunkWithTagsToNAND && - !dev->param.readChunkWithTagsFromNAND && - dev->param.writeChunkToNAND && - dev->param.readChunkFromNAND && - !dev->param.markNANDBlockBad && - !dev->param.queryNANDBlock) + if (!dev->param.is_yaffs2 && + !dev->param.write_chunk_tags_fn && + !dev->param.read_chunk_tags_fn && + dev->param.write_chunk_fn && + dev->param.read_chunk_fn && + !dev->param.bad_block_fn && !dev->param.query_block_fn) return 1; - return 0; /* bad */ + return 0; /* bad */ } - -static int yaffs_CreateInitialDirectories(yaffs_Device *dev) +static int yaffs_create_initial_dir(struct yaffs_dev *dev) { /* Initialise the unlinked, deleted, root and lost and found directories */ - dev->lostNFoundDir = dev->rootDir = NULL; - dev->unlinkedDir = dev->deletedDir = NULL; + dev->lost_n_found = dev->root_dir = NULL; + dev->unlinked_dir = dev->del_dir = NULL; - dev->unlinkedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); + dev->unlinked_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_UNLINKED, S_IFDIR); - dev->deletedDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); + dev->del_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_DELETED, S_IFDIR); - dev->rootDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_ROOT, - YAFFS_ROOT_MODE | S_IFDIR); - dev->lostNFoundDir = - yaffs_CreateFakeDirectory(dev, YAFFS_OBJECTID_LOSTNFOUND, - YAFFS_LOSTNFOUND_MODE | S_IFDIR); + dev->root_dir = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_ROOT, + YAFFS_ROOT_MODE | S_IFDIR); + dev->lost_n_found = + yaffs_create_fake_dir(dev, YAFFS_OBJECTID_LOSTNFOUND, + YAFFS_LOSTNFOUND_MODE | S_IFDIR); - if (dev->lostNFoundDir && dev->rootDir && dev->unlinkedDir && dev->deletedDir) { - yaffs_AddObjectToDirectory(dev->rootDir, dev->lostNFoundDir); + if (dev->lost_n_found && dev->root_dir && dev->unlinked_dir + && dev->del_dir) { + yaffs_add_obj_to_dir(dev->root_dir, dev->lost_n_found); return YAFFS_OK; } return YAFFS_FAIL; } -int yaffs_GutsInitialise(yaffs_Device *dev) +int yaffs_guts_initialise(struct yaffs_dev *dev) { int init_failed = 0; unsigned x; int bits; - T(YAFFS_TRACE_TRACING, (TSTR("yaffs: yaffs_GutsInitialise()" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, "yaffs: yaffs_guts_initialise()" ); /* Check stuff that must be set */ if (!dev) { - T(YAFFS_TRACE_ALWAYS, (TSTR("yaffs: Need a device" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs: Need a device" + ); return YAFFS_FAIL; } - dev->internalStartBlock = dev->param.startBlock; - dev->internalEndBlock = dev->param.endBlock; - dev->blockOffset = 0; - dev->chunkOffset = 0; - dev->nFreeChunks = 0; + dev->internal_start_block = dev->param.start_block; + dev->internal_end_block = dev->param.end_block; + dev->block_offset = 0; + dev->chunk_offset = 0; + dev->n_free_chunks = 0; - dev->gcBlock = 0; + dev->gc_block = 0; - if (dev->param.startBlock == 0) { - dev->internalStartBlock = dev->param.startBlock + 1; - dev->internalEndBlock = dev->param.endBlock + 1; - dev->blockOffset = 1; - dev->chunkOffset = dev->param.nChunksPerBlock; + if (dev->param.start_block == 0) { + dev->internal_start_block = dev->param.start_block + 1; + dev->internal_end_block = dev->param.end_block + 1; + dev->block_offset = 1; + dev->chunk_offset = dev->param.chunks_per_block; } /* Check geometry parameters. */ - if ((!dev->param.inbandTags && dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 1024) || - (!dev->param.isYaffs2 && dev->param.totalBytesPerChunk < 512) || - (dev->param.inbandTags && !dev->param.isYaffs2) || - dev->param.nChunksPerBlock < 2 || - dev->param.nReservedBlocks < 2 || - dev->internalStartBlock <= 0 || - dev->internalEndBlock <= 0 || - dev->internalEndBlock <= (dev->internalStartBlock + dev->param.nReservedBlocks + 2)) { /* otherwise it is too small */ - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: NAND geometry problems: chunk size %d, type is yaffs%s, inbandTags %d " - TENDSTR), dev->param.totalBytesPerChunk, dev->param.isYaffs2 ? "2" : "", dev->param.inbandTags)); + if ((!dev->param.inband_tags && dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 1024) || + (!dev->param.is_yaffs2 && + dev->param.total_bytes_per_chunk < 512) || + (dev->param.inband_tags && !dev->param.is_yaffs2) || + dev->param.chunks_per_block < 2 || + dev->param.n_reserved_blocks < 2 || + dev->internal_start_block <= 0 || + dev->internal_end_block <= 0 || + dev->internal_end_block <= + (dev->internal_start_block + dev->param.n_reserved_blocks + 2) + ) { + /* otherwise it is too small */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "NAND geometry problems: chunk size %d, type is yaffs%s, inband_tags %d ", + dev->param.total_bytes_per_chunk, + dev->param.is_yaffs2 ? "2" : "", + dev->param.inband_tags); return YAFFS_FAIL; } - if (yaffs_InitialiseNAND(dev) != YAFFS_OK) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: InitialiseNAND failed" TENDSTR))); + if (yaffs_init_nand(dev) != YAFFS_OK) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "InitialiseNAND failed"); return YAFFS_FAIL; } /* Sort out space for inband tags, if required */ - if (dev->param.inbandTags) - dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk - sizeof(yaffs_PackedTags2TagsPart); + if (dev->param.inband_tags) + dev->data_bytes_per_chunk = + dev->param.total_bytes_per_chunk - + sizeof(struct yaffs_packed_tags2_tags_only); else - dev->nDataBytesPerChunk = dev->param.totalBytesPerChunk; + dev->data_bytes_per_chunk = dev->param.total_bytes_per_chunk; /* Got the right mix of functions? */ - if (!yaffs_CheckDevFunctions(dev)) { + if (!yaffs_check_dev_fns(dev)) { /* Function missing */ - T(YAFFS_TRACE_ALWAYS, - (TSTR - ("yaffs: device function(s) missing or wrong\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, + "device function(s) missing or wrong"); return YAFFS_FAIL; } - /* This is really a compilation check. */ - if (!yaffs_CheckStructures()) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs_CheckStructures failed\n" TENDSTR))); - return YAFFS_FAIL; - } - - if (dev->isMounted) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: device already mounted\n" TENDSTR))); + if (dev->is_mounted) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "device already mounted"); return YAFFS_FAIL; } /* Finished with most checks. One or two more checks happen later on too. */ - dev->isMounted = 1; + dev->is_mounted = 1; /* OK now calculate a few things for the device */ /* * Calculate all the chunk size manipulation numbers: */ - x = dev->nDataBytesPerChunk; - /* We always use dev->chunkShift and dev->chunkDiv */ - dev->chunkShift = Shifts(x); - x >>= dev->chunkShift; - dev->chunkDiv = x; - /* We only use chunk mask if chunkDiv is 1 */ - dev->chunkMask = (1<<dev->chunkShift) - 1; + x = dev->data_bytes_per_chunk; + /* We always use dev->chunk_shift and dev->chunk_div */ + dev->chunk_shift = calc_shifts(x); + x >>= dev->chunk_shift; + dev->chunk_div = x; + /* We only use chunk mask if chunk_div is 1 */ + dev->chunk_mask = (1 << dev->chunk_shift) - 1; /* - * Calculate chunkGroupBits. - * We need to find the next power of 2 > than internalEndBlock + * Calculate chunk_grp_bits. + * We need to find the next power of 2 > than internal_end_block */ - x = dev->param.nChunksPerBlock * (dev->internalEndBlock + 1); + x = dev->param.chunks_per_block * (dev->internal_end_block + 1); - bits = ShiftsGE(x); + bits = calc_shifts_ceiling(x); /* Set up tnode width if wide tnodes are enabled. */ - if (!dev->param.wideTnodesDisabled) { + if (!dev->param.wide_tnodes_disabled) { /* bits must be even so that we end up with 32-bit words */ if (bits & 1) bits++; if (bits < 16) - dev->tnodeWidth = 16; + dev->tnode_width = 16; else - dev->tnodeWidth = bits; - } else - dev->tnodeWidth = 16; + dev->tnode_width = bits; + } else { + dev->tnode_width = 16; + } - dev->tnodeMask = (1<<dev->tnodeWidth)-1; + dev->tnode_mask = (1 << dev->tnode_width) - 1; /* Level0 Tnodes are 16 bits or wider (if wide tnodes are enabled), * so if the bitwidth of the * chunk range we're using is greater than 16 we need - * to figure out chunk shift and chunkGroupSize + * to figure out chunk shift and chunk_grp_size */ - if (bits <= dev->tnodeWidth) - dev->chunkGroupBits = 0; + if (bits <= dev->tnode_width) + dev->chunk_grp_bits = 0; else - dev->chunkGroupBits = bits - dev->tnodeWidth; + dev->chunk_grp_bits = bits - dev->tnode_width; + dev->tnode_size = (dev->tnode_width * YAFFS_NTNODES_LEVEL0) / 8; + if (dev->tnode_size < sizeof(struct yaffs_tnode)) + dev->tnode_size = sizeof(struct yaffs_tnode); - dev->chunkGroupSize = 1 << dev->chunkGroupBits; + dev->chunk_grp_size = 1 << dev->chunk_grp_bits; - if (dev->param.nChunksPerBlock < dev->chunkGroupSize) { + if (dev->param.chunks_per_block < dev->chunk_grp_size) { /* We have a problem because the soft delete won't work if * the chunk group size > chunks per block. * This can be remedied by using larger "virtual blocks". */ - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: chunk group too large\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ALWAYS, "chunk group too large"); return YAFFS_FAIL; } @@ -7931,212 +4912,211 @@ int yaffs_GutsInitialise(yaffs_Device *dev) /* OK, we've finished verifying the device, lets continue with initialisation */ /* More device initialisation */ - dev->allGCs = 0; - dev->passiveGCs = 0; - dev->oldestDirtyGCs = 0; - dev->backgroundGCs = 0; - dev->gcBlockFinder = 0; - dev->bufferedBlock = -1; - dev->doingBufferedBlockRewrite = 0; - dev->nDeletedFiles = 0; - dev->nBackgroundDeletions = 0; - dev->nUnlinkedFiles = 0; - dev->eccFixed = 0; - dev->eccUnfixed = 0; - dev->tagsEccFixed = 0; - dev->tagsEccUnfixed = 0; - dev->nErasureFailures = 0; - dev->nErasedBlocks = 0; - dev->gcDisable= 0; - dev->hasPendingPrioritisedGCs = 1; /* Assume the worst for now, will get fixed on first GC */ - YINIT_LIST_HEAD(&dev->dirtyDirectories); - dev->oldestDirtySequence = 0; - dev->oldestDirtyBlock = 0; + dev->all_gcs = 0; + dev->passive_gc_count = 0; + dev->oldest_dirty_gc_count = 0; + dev->bg_gcs = 0; + dev->gc_block_finder = 0; + dev->buffered_block = -1; + dev->doing_buffered_block_rewrite = 0; + dev->n_deleted_files = 0; + dev->n_bg_deletions = 0; + dev->n_unlinked_files = 0; + dev->n_ecc_fixed = 0; + dev->n_ecc_unfixed = 0; + dev->n_tags_ecc_fixed = 0; + dev->n_tags_ecc_unfixed = 0; + dev->n_erase_failures = 0; + dev->n_erased_blocks = 0; + dev->gc_disable = 0; + dev->has_pending_prioritised_gc = 1; /* Assume the worst for now, will get fixed on first GC */ + INIT_LIST_HEAD(&dev->dirty_dirs); + dev->oldest_dirty_seq = 0; + dev->oldest_dirty_block = 0; /* Initialise temporary buffers and caches. */ - if (!yaffs_InitialiseTempBuffers(dev)) + if (!yaffs_init_tmp_buffers(dev)) init_failed = 1; - dev->srCache = NULL; - dev->gcCleanupList = NULL; - + dev->cache = NULL; + dev->gc_cleanup_list = NULL; - if (!init_failed && - dev->param.nShortOpCaches > 0) { + if (!init_failed && dev->param.n_caches > 0) { int i; void *buf; - int srCacheBytes = dev->param.nShortOpCaches * sizeof(yaffs_ChunkCache); + int cache_bytes = + dev->param.n_caches * sizeof(struct yaffs_cache); - if (dev->param.nShortOpCaches > YAFFS_MAX_SHORT_OP_CACHES) - dev->param.nShortOpCaches = YAFFS_MAX_SHORT_OP_CACHES; + if (dev->param.n_caches > YAFFS_MAX_SHORT_OP_CACHES) + dev->param.n_caches = YAFFS_MAX_SHORT_OP_CACHES; - dev->srCache = YMALLOC(srCacheBytes); + dev->cache = kmalloc(cache_bytes, GFP_NOFS); - buf = (__u8 *) dev->srCache; + buf = (u8 *) dev->cache; - if (dev->srCache) - memset(dev->srCache, 0, srCacheBytes); + if (dev->cache) + memset(dev->cache, 0, cache_bytes); - for (i = 0; i < dev->param.nShortOpCaches && buf; i++) { - dev->srCache[i].object = NULL; - dev->srCache[i].lastUse = 0; - dev->srCache[i].dirty = 0; - dev->srCache[i].data = buf = YMALLOC_DMA(dev->param.totalBytesPerChunk); + for (i = 0; i < dev->param.n_caches && buf; i++) { + dev->cache[i].object = NULL; + dev->cache[i].last_use = 0; + dev->cache[i].dirty = 0; + dev->cache[i].data = buf = + kmalloc(dev->param.total_bytes_per_chunk, GFP_NOFS); } if (!buf) init_failed = 1; - dev->srLastUse = 0; + dev->cache_last_use = 0; } - dev->cacheHits = 0; + dev->cache_hits = 0; if (!init_failed) { - dev->gcCleanupList = YMALLOC(dev->param.nChunksPerBlock * sizeof(__u32)); - if (!dev->gcCleanupList) + dev->gc_cleanup_list = + kmalloc(dev->param.chunks_per_block * sizeof(u32), + GFP_NOFS); + if (!dev->gc_cleanup_list) init_failed = 1; } - if (dev->param.isYaffs2) - dev->param.useHeaderFileSize = 1; + if (dev->param.is_yaffs2) + dev->param.use_header_file_size = 1; - if (!init_failed && !yaffs_InitialiseBlocks(dev)) + if (!init_failed && !yaffs_init_blocks(dev)) init_failed = 1; - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); + yaffs_init_tnodes_and_objs(dev); - if (!init_failed && !yaffs_CreateInitialDirectories(dev)) + if (!init_failed && !yaffs_create_initial_dir(dev)) init_failed = 1; - if (!init_failed) { /* Now scan the flash. */ - if (dev->param.isYaffs2) { - if (yaffs_CheckpointRestore(dev)) { - yaffs_CheckObjectDetailsLoaded(dev->rootDir); - T(YAFFS_TRACE_ALWAYS, - (TSTR("yaffs: restored from checkpoint" TENDSTR))); + if (dev->param.is_yaffs2) { + if (yaffs2_checkpt_restore(dev)) { + yaffs_check_obj_details_loaded(dev->root_dir); + yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT, + "yaffs: restored from checkpoint" + ); } else { /* Clean up the mess caused by an aborted checkpoint load * and scan backwards. */ - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); + yaffs_deinit_blocks(dev); + yaffs_deinit_tnodes_and_objs(dev); - dev->nErasedBlocks = 0; - dev->nFreeChunks = 0; - dev->allocationBlock = -1; - dev->allocationPage = -1; - dev->nDeletedFiles = 0; - dev->nUnlinkedFiles = 0; - dev->nBackgroundDeletions = 0; + dev->n_erased_blocks = 0; + dev->n_free_chunks = 0; + dev->alloc_block = -1; + dev->alloc_page = -1; + dev->n_deleted_files = 0; + dev->n_unlinked_files = 0; + dev->n_bg_deletions = 0; - if (!init_failed && !yaffs_InitialiseBlocks(dev)) + if (!init_failed && !yaffs_init_blocks(dev)) init_failed = 1; - yaffs_InitialiseTnodes(dev); - yaffs_InitialiseObjects(dev); + yaffs_init_tnodes_and_objs(dev); - if (!init_failed && !yaffs_CreateInitialDirectories(dev)) + if (!init_failed + && !yaffs_create_initial_dir(dev)) init_failed = 1; - if (!init_failed && !yaffs_ScanBackwards(dev)) + if (!init_failed && !yaffs2_scan_backwards(dev)) init_failed = 1; } - } else if (!yaffs_Scan(dev)) - init_failed = 1; + } else if (!yaffs1_scan(dev)) { + init_failed = 1; + } - yaffs_StripDeletedObjects(dev); - yaffs_FixHangingObjects(dev); - if(dev->param.emptyLostAndFound) - yaffs_EmptyLostAndFound(dev); + yaffs_strip_deleted_objs(dev); + yaffs_fix_hanging_objs(dev); + if (dev->param.empty_lost_n_found) + yaffs_empty_l_n_f(dev); } if (init_failed) { /* Clean up the mess */ - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() aborted.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() aborted."); - yaffs_Deinitialise(dev); + yaffs_deinitialise(dev); return YAFFS_FAIL; } /* Zero out stats */ - dev->nPageReads = 0; - dev->nPageWrites = 0; - dev->nBlockErasures = 0; - dev->nGCCopies = 0; - dev->nRetriedWrites = 0; + dev->n_page_reads = 0; + dev->n_page_writes = 0; + dev->n_erasures = 0; + dev->n_gc_copies = 0; + dev->n_retired_writes = 0; - dev->nRetiredBlocks = 0; + dev->n_retired_blocks = 0; - yaffs_VerifyFreeChunks(dev); - yaffs_VerifyBlocks(dev); + yaffs_verify_free_chunks(dev); + yaffs_verify_blocks(dev); /* Clean up any aborted checkpoint data */ - if(!dev->isCheckpointed && dev->blocksInCheckpoint > 0) - yaffs_InvalidateCheckpoint(dev); + if (!dev->is_checkpointed && dev->blocks_in_checkpt > 0) + yaffs2_checkpt_invalidate(dev); - T(YAFFS_TRACE_TRACING, - (TSTR("yaffs: yaffs_GutsInitialise() done.\n" TENDSTR))); + yaffs_trace(YAFFS_TRACE_TRACING, + "yaffs: yaffs_guts_initialise() done."); return YAFFS_OK; } -void yaffs_Deinitialise(yaffs_Device *dev) +void yaffs_deinitialise(struct yaffs_dev *dev) { - if (dev->isMounted) { + if (dev->is_mounted) { int i; - yaffs_DeinitialiseBlocks(dev); - yaffs_DeinitialiseTnodes(dev); - yaffs_DeinitialiseObjects(dev); - if (dev->param.nShortOpCaches > 0 && - dev->srCache) { + yaffs_deinit_blocks(dev); + yaffs_deinit_tnodes_and_objs(dev); + if (dev->param.n_caches > 0 && dev->cache) { - for (i = 0; i < dev->param.nShortOpCaches; i++) { - if (dev->srCache[i].data) - YFREE(dev->srCache[i].data); - dev->srCache[i].data = NULL; + for (i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].data) + kfree(dev->cache[i].data); + dev->cache[i].data = NULL; } - YFREE(dev->srCache); - dev->srCache = NULL; + kfree(dev->cache); + dev->cache = NULL; } - YFREE(dev->gcCleanupList); + kfree(dev->gc_cleanup_list); for (i = 0; i < YAFFS_N_TEMP_BUFFERS; i++) - YFREE(dev->tempBuffer[i].buffer); + kfree(dev->temp_buffer[i].buffer); - dev->isMounted = 0; + dev->is_mounted = 0; - if (dev->param.deinitialiseNAND) - dev->param.deinitialiseNAND(dev); + if (dev->param.deinitialise_flash_fn) + dev->param.deinitialise_flash_fn(dev); } } -static int yaffs_CountFreeChunks(yaffs_Device *dev) +int yaffs_count_free_chunks(struct yaffs_dev *dev) { - int nFree=0; + int n_free = 0; int b; - yaffs_BlockInfo *blk; + struct yaffs_block_info *blk; - blk = dev->blockInfo; - for (b = dev->internalStartBlock; b <= dev->internalEndBlock; b++) { - switch (blk->blockState) { + blk = dev->block_info; + for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { + switch (blk->block_state) { case YAFFS_BLOCK_STATE_EMPTY: case YAFFS_BLOCK_STATE_ALLOCATING: case YAFFS_BLOCK_STATE_COLLECTING: case YAFFS_BLOCK_STATE_FULL: - nFree += - (dev->param.nChunksPerBlock - blk->pagesInUse + - blk->softDeletions); + n_free += + (dev->param.chunks_per_block - blk->pages_in_use + + blk->soft_del_pages); break; default: break; @@ -8144,94 +5124,41 @@ static int yaffs_CountFreeChunks(yaffs_Device *dev) blk++; } - return nFree; + return n_free; } -int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev) +int yaffs_get_n_free_chunks(struct yaffs_dev *dev) { /* This is what we report to the outside world */ - int nFree; - int nDirtyCacheChunks; - int blocksForCheckpoint; + int n_free; + int n_dirty_caches; + int blocks_for_checkpt; int i; -#if 1 - nFree = dev->nFreeChunks; -#else - nFree = yaffs_CountFreeChunks(dev); -#endif - - nFree += dev->nDeletedFiles; + n_free = dev->n_free_chunks; + n_free += dev->n_deleted_files; /* Now count the number of dirty chunks in the cache and subtract those */ - for (nDirtyCacheChunks = 0, i = 0; i < dev->param.nShortOpCaches; i++) { - if (dev->srCache[i].dirty) - nDirtyCacheChunks++; + for (n_dirty_caches = 0, i = 0; i < dev->param.n_caches; i++) { + if (dev->cache[i].dirty) + n_dirty_caches++; } - nFree -= nDirtyCacheChunks; + n_free -= n_dirty_caches; - nFree -= ((dev->param.nReservedBlocks + 1) * dev->param.nChunksPerBlock); + n_free -= + ((dev->param.n_reserved_blocks + 1) * dev->param.chunks_per_block); /* Now we figure out how much to reserve for the checkpoint and report that... */ - blocksForCheckpoint = yaffs_CalcCheckpointBlocksRequired(dev) - dev->blocksInCheckpoint; - if (blocksForCheckpoint < 0) - blocksForCheckpoint = 0; + blocks_for_checkpt = yaffs_calc_checkpt_blocks_required(dev); - nFree -= (blocksForCheckpoint * dev->param.nChunksPerBlock); + n_free -= (blocks_for_checkpt * dev->param.chunks_per_block); - if (nFree < 0) - nFree = 0; + if (n_free < 0) + n_free = 0; - return nFree; + return n_free; } - -static int yaffs_freeVerificationFailures; - -static void yaffs_VerifyFreeChunks(yaffs_Device *dev) -{ - int counted; - int difference; - - if (yaffs_SkipVerification(dev)) - return; - - counted = yaffs_CountFreeChunks(dev); - - difference = dev->nFreeChunks - counted; - - if (difference) { - T(YAFFS_TRACE_ALWAYS, - (TSTR("Freechunks verification failure %d %d %d" TENDSTR), - dev->nFreeChunks, counted, difference)); - yaffs_freeVerificationFailures++; - } -} - -/*---------------------------------------- YAFFS test code ----------------------*/ - -#define yaffs_CheckStruct(structure, syze, name) \ - do { \ - if (sizeof(structure) != syze) { \ - T(YAFFS_TRACE_ALWAYS, (TSTR("%s should be %d but is %d\n" TENDSTR),\ - name, syze, (int) sizeof(structure))); \ - return YAFFS_FAIL; \ - } \ - } while (0) - -static int yaffs_CheckStructures(void) -{ -/* yaffs_CheckStruct(yaffs_Tags,8,"yaffs_Tags"); */ -/* yaffs_CheckStruct(yaffs_TagsUnion,8,"yaffs_TagsUnion"); */ -/* yaffs_CheckStruct(yaffs_Spare,16,"yaffs_Spare"); */ -#ifndef CONFIG_YAFFS_TNODE_LIST_DEBUG -/* yaffs_CheckStruct(yaffs_Tnode, 2 * YAFFS_NTNODES_LEVEL0, "yaffs_Tnode"); */ -#endif -#ifndef CONFIG_YAFFS_WINCE - yaffs_CheckStruct(yaffs_ObjectHeader, 512, "yaffs_ObjectHeader"); -#endif - return YAFFS_OK; -} diff --git a/fs/yaffs2/yaffs_guts.h b/fs/yaffs2/yaffs_guts.h index 3647d6bce6c..307eba28676 100644 --- a/fs/yaffs2/yaffs_guts.h +++ b/fs/yaffs2/yaffs_guts.h @@ -16,7 +16,6 @@ #ifndef __YAFFS_GUTS_H__ #define __YAFFS_GUTS_H__ -#include "devextras.h" #include "yportenv.h" #define YAFFS_OK 1 @@ -52,16 +51,14 @@ #define YAFFS_MAX_CHUNK_ID 0x000FFFFF -#define YAFFS_UNUSED_OBJECT_ID 0x0003FFFF - #define YAFFS_ALLOCATION_NOBJECTS 100 #define YAFFS_ALLOCATION_NTNODES 100 #define YAFFS_ALLOCATION_NLINKS 100 #define YAFFS_NOBJECT_BUCKETS 256 - #define YAFFS_OBJECT_SPACE 0x40000 +#define YAFFS_MAX_OBJECT_ID (YAFFS_OBJECT_SPACE -1) #define YAFFS_CHECKPOINT_VERSION 4 @@ -86,7 +83,6 @@ #define YAFFS_OBJECTID_CHECKPOINT_DATA 0x20 #define YAFFS_SEQUENCE_CHECKPOINT_DATA 0x21 - #define YAFFS_MAX_SHORT_OP_CACHES 20 #define YAFFS_N_TEMP_BUFFERS 6 @@ -111,17 +107,15 @@ #define YAFFS_SEQUENCE_BAD_BLOCK 0xFFFF0000 /* ChunkCache is used for short read/write operations.*/ -typedef struct { - struct yaffs_ObjectStruct *object; - int chunkId; - int lastUse; +struct yaffs_cache { + struct yaffs_obj *object; + int chunk_id; + int last_use; int dirty; - int nBytes; /* Only valid if the cache is dirty */ + int n_bytes; /* Only valid if the cache is dirty */ int locked; /* Can't push out or flush while locked. */ - __u8 *data; -} yaffs_ChunkCache; - - + u8 *data; +}; /* Tags structures in RAM * NB This uses bitfield. Bitfields should not straddle a u32 boundary otherwise @@ -129,112 +123,112 @@ typedef struct { */ #ifndef CONFIG_YAFFS_NO_YAFFS1 -typedef struct { - unsigned chunkId:20; - unsigned serialNumber:2; - unsigned byteCountLSB:10; - unsigned objectId:18; +struct yaffs_tags { + unsigned chunk_id:20; + unsigned serial_number:2; + unsigned n_bytes_lsb:10; + unsigned obj_id:18; unsigned ecc:12; - unsigned byteCountMSB:2; -} yaffs_Tags; + unsigned n_bytes_msb:2; +}; -typedef union { - yaffs_Tags asTags; - __u8 asBytes[8]; -} yaffs_TagsUnion; +union yaffs_tags_union { + struct yaffs_tags as_tags; + u8 as_bytes[8]; +}; #endif /* Stuff used for extended tags in YAFFS2 */ -typedef enum { +enum yaffs_ecc_result { YAFFS_ECC_RESULT_UNKNOWN, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_ECC_RESULT_FIXED, YAFFS_ECC_RESULT_UNFIXED -} yaffs_ECCResult; +}; -typedef enum { +enum yaffs_obj_type { YAFFS_OBJECT_TYPE_UNKNOWN, YAFFS_OBJECT_TYPE_FILE, YAFFS_OBJECT_TYPE_SYMLINK, YAFFS_OBJECT_TYPE_DIRECTORY, YAFFS_OBJECT_TYPE_HARDLINK, YAFFS_OBJECT_TYPE_SPECIAL -} yaffs_ObjectType; +}; #define YAFFS_OBJECT_TYPE_MAX YAFFS_OBJECT_TYPE_SPECIAL -typedef struct { +struct yaffs_ext_tags { - unsigned validMarker0; - unsigned chunkUsed; /* Status of the chunk: used or unused */ - unsigned objectId; /* If 0 then this is not part of an object (unused) */ - unsigned chunkId; /* If 0 then this is a header, else a data chunk */ - unsigned byteCount; /* Only valid for data chunks */ + unsigned validity0; + unsigned chunk_used; /* Status of the chunk: used or unused */ + unsigned obj_id; /* If 0 then this is not part of an object (unused) */ + unsigned chunk_id; /* If 0 then this is a header, else a data chunk */ + unsigned n_bytes; /* Only valid for data chunks */ /* The following stuff only has meaning when we read */ - yaffs_ECCResult eccResult; - unsigned blockBad; + enum yaffs_ecc_result ecc_result; + unsigned block_bad; /* YAFFS 1 stuff */ - unsigned chunkDeleted; /* The chunk is marked deleted */ - unsigned serialNumber; /* Yaffs1 2-bit serial number */ + unsigned is_deleted; /* The chunk is marked deleted */ + unsigned serial_number; /* Yaffs1 2-bit serial number */ /* YAFFS2 stuff */ - unsigned sequenceNumber; /* The sequence number of this block */ + unsigned seq_number; /* The sequence number of this block */ /* Extra info if this is an object header (YAFFS2 only) */ - unsigned extraHeaderInfoAvailable; /* There is extra info available if this is not zero */ - unsigned extraParentObjectId; /* The parent object */ - unsigned extraIsShrinkHeader; /* Is it a shrink header? */ - unsigned extraShadows; /* Does this shadow another object? */ + unsigned extra_available; /* There is extra info available if this is not zero */ + unsigned extra_parent_id; /* The parent object */ + unsigned extra_is_shrink; /* Is it a shrink header? */ + unsigned extra_shadows; /* Does this shadow another object? */ - yaffs_ObjectType extraObjectType; /* What object type? */ + enum yaffs_obj_type extra_obj_type; /* What object type? */ - unsigned extraFileLength; /* Length if it is a file */ - unsigned extraEquivalentObjectId; /* Equivalent object Id if it is a hard link */ + unsigned extra_length; /* Length if it is a file */ + unsigned extra_equiv_id; /* Equivalent object Id if it is a hard link */ - unsigned validMarker1; + unsigned validity1; -} yaffs_ExtendedTags; +}; /* Spare structure for YAFFS1 */ -typedef struct { - __u8 tagByte0; - __u8 tagByte1; - __u8 tagByte2; - __u8 tagByte3; - __u8 pageStatus; /* set to 0 to delete the chunk */ - __u8 blockStatus; - __u8 tagByte4; - __u8 tagByte5; - __u8 ecc1[3]; - __u8 tagByte6; - __u8 tagByte7; - __u8 ecc2[3]; -} yaffs_Spare; +struct yaffs_spare { + u8 tb0; + u8 tb1; + u8 tb2; + u8 tb3; + u8 page_status; /* set to 0 to delete the chunk */ + u8 block_status; + u8 tb4; + u8 tb5; + u8 ecc1[3]; + u8 tb6; + u8 tb7; + u8 ecc2[3]; +}; /*Special structure for passing through to mtd */ -struct yaffs_NANDSpare { - yaffs_Spare spare; +struct yaffs_nand_spare { + struct yaffs_spare spare; int eccres1; int eccres2; }; /* Block data in RAM */ -typedef enum { +enum yaffs_block_state { YAFFS_BLOCK_STATE_UNKNOWN = 0, YAFFS_BLOCK_STATE_SCANNING, - /* Being scanned */ + /* Being scanned */ YAFFS_BLOCK_STATE_NEEDS_SCANNING, /* The block might have something on it (ie it is allocating or full, perhaps empty) * but it needs to be scanned to determine its true state. - * This state is only valid during yaffs_Scan. + * This state is only valid during scanning. * NB We tolerate empty because the pre-scanner might be incapable of deciding * However, if this state is returned on a YAFFS2 device, then we expect a sequence number */ @@ -247,13 +241,13 @@ typedef enum { * At least one page holds valid data. * This is the one currently being used for page * allocation. Should never be more than one of these. - * If a block is only partially allocated at mount it is treated as full. + * If a block is only partially allocated at mount it is treated as full. */ YAFFS_BLOCK_STATE_FULL, /* All the pages in this block have been allocated. - * If a block was only partially allocated when mounted we treat - * it as fully allocated. + * If a block was only partially allocated when mounted we treat + * it as fully allocated. */ YAFFS_BLOCK_STATE_DIRTY, @@ -268,106 +262,82 @@ typedef enum { /* This block is being garbage collected */ YAFFS_BLOCK_STATE_DEAD - /* This block has failed and is not in use */ -} yaffs_BlockState; + /* This block has failed and is not in use */ +}; #define YAFFS_NUMBER_OF_BLOCK_STATES (YAFFS_BLOCK_STATE_DEAD + 1) +struct yaffs_block_info { -typedef struct { - - int softDeletions:10; /* number of soft deleted pages */ - int pagesInUse:10; /* number of pages in use */ - unsigned blockState:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */ - __u32 needsRetiring:1; /* Data has failed on this block, need to get valid data off */ - /* and retire the block. */ - __u32 skipErasedCheck:1; /* If this is set we can skip the erased check on this block */ - __u32 gcPrioritise:1; /* An ECC check or blank check has failed on this block. + int soft_del_pages:10; /* number of soft deleted pages */ + int pages_in_use:10; /* number of pages in use */ + unsigned block_state:4; /* One of the above block states. NB use unsigned because enum is sometimes an int */ + u32 needs_retiring:1; /* Data has failed on this block, need to get valid data off */ + /* and retire the block. */ + u32 skip_erased_check:1; /* If this is set we can skip the erased check on this block */ + u32 gc_prioritise:1; /* An ECC check or blank check has failed on this block. It should be prioritised for GC */ - __u32 chunkErrorStrikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ + u32 chunk_error_strikes:3; /* How many times we've had ecc etc failures on this block and tried to reuse it */ #ifdef CONFIG_YAFFS_YAFFS2 - __u32 hasShrinkHeader:1; /* This block has at least one shrink object header */ - __u32 sequenceNumber; /* block sequence number for yaffs2 */ + u32 has_shrink_hdr:1; /* This block has at least one shrink object header */ + u32 seq_number; /* block sequence number for yaffs2 */ #endif -} yaffs_BlockInfo; +}; /* -------------------------- Object structure -------------------------------*/ /* This is the object structure as stored on NAND */ -typedef struct { - yaffs_ObjectType type; +struct yaffs_obj_hdr { + enum yaffs_obj_type type; /* Apply to everything */ - int parentObjectId; - __u16 sum__NoLongerUsed; /* checksum of name. No longer used */ + int parent_obj_id; + u16 sum_no_longer_used; /* checksum of name. No longer used */ YCHAR name[YAFFS_MAX_NAME_LENGTH + 1]; /* The following apply to directories, files, symlinks - not hard links */ - __u32 yst_mode; /* protection */ + u32 yst_mode; /* protection */ -#ifdef CONFIG_YAFFS_WINCE - __u32 notForWinCE[5]; -#else - __u32 yst_uid; - __u32 yst_gid; - __u32 yst_atime; - __u32 yst_mtime; - __u32 yst_ctime; -#endif + u32 yst_uid; + u32 yst_gid; + u32 yst_atime; + u32 yst_mtime; + u32 yst_ctime; /* File size applies to files only */ - int fileSize; + int file_size; /* Equivalent object id applies to hard links only. */ - int equivalentObjectId; + int equiv_id; /* Alias is for symlinks only. */ YCHAR alias[YAFFS_MAX_ALIAS_LENGTH + 1]; - __u32 yst_rdev; /* device stuff for block and char devices (major/min) */ - -#ifdef CONFIG_YAFFS_WINCE - __u32 win_ctime[2]; - __u32 win_atime[2]; - __u32 win_mtime[2]; -#else - __u32 roomToGrow[6]; - -#endif - __u32 inbandShadowsObject; - __u32 inbandIsShrink; - - __u32 reservedSpace[2]; - int shadowsObject; /* This object header shadows the specified object if > 0 */ + u32 yst_rdev; /* device stuff for block and char devices (major/min) */ - /* isShrink applies to object headers written when we shrink the file (ie resize) */ - __u32 isShrink; + u32 win_ctime[2]; + u32 win_atime[2]; + u32 win_mtime[2]; -} yaffs_ObjectHeader; + u32 inband_shadowed_obj_id; + u32 inband_is_shrink; -/*--------------------------- Tnode -------------------------- */ + u32 reserved[2]; + int shadows_obj; /* This object header shadows the specified object if > 0 */ -union yaffs_Tnode_union { -#ifdef CONFIG_YAFFS_TNODE_LIST_DEBUG - union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL + 1]; -#else - union yaffs_Tnode_union *internal[YAFFS_NTNODES_INTERNAL]; -#endif -/* __u16 level0[YAFFS_NTNODES_LEVEL0]; */ + /* is_shrink applies to object headers written when we shrink the file (ie resize) */ + u32 is_shrink; }; -typedef union yaffs_Tnode_union yaffs_Tnode; +/*--------------------------- Tnode -------------------------- */ -struct yaffs_TnodeList_struct { - struct yaffs_TnodeList_struct *next; - yaffs_Tnode *tnodes; +struct yaffs_tnode { + struct yaffs_tnode *internal[YAFFS_NTNODES_INTERNAL]; }; -typedef struct yaffs_TnodeList_struct yaffs_TnodeList; - /*------------------------ Object -----------------------------*/ /* An object can be one of: * - a directory (no data, has children links @@ -376,544 +346,570 @@ typedef struct yaffs_TnodeList_struct yaffs_TnodeList; * - a hard link */ -typedef struct { - __u32 fileSize; - __u32 scannedFileSize; - __u32 shrinkSize; - int topLevel; - yaffs_Tnode *top; -} yaffs_FileStructure; +struct yaffs_file_var { + u32 file_size; + u32 scanned_size; + u32 shrink_size; + int top_level; + struct yaffs_tnode *top; +}; -typedef struct { - struct ylist_head children; /* list of child links */ - struct ylist_head dirty; /* Entry for list of dirty directories */ -} yaffs_DirectoryStructure; +struct yaffs_dir_var { + struct list_head children; /* list of child links */ + struct list_head dirty; /* Entry for list of dirty directories */ +}; -typedef struct { +struct yaffs_symlink_var { YCHAR *alias; -} yaffs_SymLinkStructure; - -typedef struct { - struct yaffs_ObjectStruct *equivalentObject; - __u32 equivalentObjectId; -} yaffs_HardLinkStructure; - -typedef union { - yaffs_FileStructure fileVariant; - yaffs_DirectoryStructure directoryVariant; - yaffs_SymLinkStructure symLinkVariant; - yaffs_HardLinkStructure hardLinkVariant; -} yaffs_ObjectVariant; - - - -struct yaffs_ObjectStruct { - __u8 deleted:1; /* This should only apply to unlinked files. */ - __u8 softDeleted:1; /* it has also been soft deleted */ - __u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory.*/ - __u8 fake:1; /* A fake object has no presence on NAND. */ - __u8 renameAllowed:1; /* Some objects are not allowed to be renamed. */ - __u8 unlinkAllowed:1; - __u8 dirty:1; /* the object needs to be written to flash */ - __u8 valid:1; /* When the file system is being loaded up, this +}; + +struct yaffs_hardlink_var { + struct yaffs_obj *equiv_obj; + u32 equiv_id; +}; + +union yaffs_obj_var { + struct yaffs_file_var file_variant; + struct yaffs_dir_var dir_variant; + struct yaffs_symlink_var symlink_variant; + struct yaffs_hardlink_var hardlink_variant; +}; + +struct yaffs_obj { + u8 deleted:1; /* This should only apply to unlinked files. */ + u8 soft_del:1; /* it has also been soft deleted */ + u8 unlinked:1; /* An unlinked file. The file should be in the unlinked directory. */ + u8 fake:1; /* A fake object has no presence on NAND. */ + u8 rename_allowed:1; /* Some objects are not allowed to be renamed. */ + u8 unlink_allowed:1; + u8 dirty:1; /* the object needs to be written to flash */ + u8 valid:1; /* When the file system is being loaded up, this * object might be created before the data * is available (ie. file data records appear before the header). */ - __u8 lazyLoaded:1; /* This object has been lazy loaded and is missing some detail */ + u8 lazy_loaded:1; /* This object has been lazy loaded and is missing some detail */ - __u8 deferedFree:1; /* For Linux kernel. Object is removed from NAND, but is + u8 defered_free:1; /* For Linux kernel. Object is removed from NAND, but is * still in the inode cache. Free of object is defered. * until the inode is released. */ - __u8 beingCreated:1; /* This object is still being created so skip some checks. */ - __u8 isShadowed:1; /* This object is shadowed on the way to being renamed. */ + u8 being_created:1; /* This object is still being created so skip some checks. */ + u8 is_shadowed:1; /* This object is shadowed on the way to being renamed. */ - __u8 serial; /* serial number of chunk in NAND. Cached here */ - __u16 sum; /* sum of the name to speed searching */ + u8 xattr_known:1; /* We know if this has object has xattribs or not. */ + u8 has_xattr:1; /* This object has xattribs. Valid if xattr_known. */ - struct yaffs_DeviceStruct *myDev; /* The device I'm on */ + u8 serial; /* serial number of chunk in NAND. Cached here */ + u16 sum; /* sum of the name to speed searching */ - struct ylist_head hashLink; /* list of objects in this hash bucket */ + struct yaffs_dev *my_dev; /* The device I'm on */ - struct ylist_head hardLinks; /* all the equivalent hard linked objects */ + struct list_head hash_link; /* list of objects in this hash bucket */ + + struct list_head hard_links; /* all the equivalent hard linked objects */ /* directory structure stuff */ /* also used for linking up the free list */ - struct yaffs_ObjectStruct *parent; - struct ylist_head siblings; + struct yaffs_obj *parent; + struct list_head siblings; /* Where's my object header in NAND? */ - int hdrChunk; + int hdr_chunk; - int nDataChunks; /* Number of data chunks attached to the file. */ + int n_data_chunks; /* Number of data chunks attached to the file. */ - __u32 objectId; /* the object id value */ + u32 obj_id; /* the object id value */ - __u32 yst_mode; + u32 yst_mode; -#ifdef CONFIG_YAFFS_SHORT_NAMES_IN_RAM - YCHAR shortName[YAFFS_SHORT_NAME_LENGTH + 1]; +#ifndef CONFIG_YAFFS_NO_SHORT_NAMES + YCHAR short_name[YAFFS_SHORT_NAME_LENGTH + 1]; #endif #ifdef CONFIG_YAFFS_WINCE - __u32 win_ctime[2]; - __u32 win_mtime[2]; - __u32 win_atime[2]; + u32 win_ctime[2]; + u32 win_mtime[2]; + u32 win_atime[2]; #else - __u32 yst_uid; - __u32 yst_gid; - __u32 yst_atime; - __u32 yst_mtime; - __u32 yst_ctime; + u32 yst_uid; + u32 yst_gid; + u32 yst_atime; + u32 yst_mtime; + u32 yst_ctime; #endif - __u32 yst_rdev; + u32 yst_rdev; - void *myInode; + void *my_inode; - yaffs_ObjectType variantType; + enum yaffs_obj_type variant_type; - yaffs_ObjectVariant variant; + union yaffs_obj_var variant; }; -typedef struct yaffs_ObjectStruct yaffs_Object; - -struct yaffs_ObjectList_struct { - yaffs_Object *objects; - struct yaffs_ObjectList_struct *next; -}; - -typedef struct yaffs_ObjectList_struct yaffs_ObjectList; - -typedef struct { - struct ylist_head list; +struct yaffs_obj_bucket { + struct list_head list; int count; -} yaffs_ObjectBucket; - +}; -/* yaffs_CheckpointObject holds the definition of an object as dumped +/* yaffs_checkpt_obj holds the definition of an object as dumped * by checkpointing. */ -typedef struct { - int structType; - __u32 objectId; - __u32 parentId; - int hdrChunk; - yaffs_ObjectType variantType:3; - __u8 deleted:1; - __u8 softDeleted:1; - __u8 unlinked:1; - __u8 fake:1; - __u8 renameAllowed:1; - __u8 unlinkAllowed:1; - __u8 serial; - - int nDataChunks; - __u32 fileSizeOrEquivalentObjectId; -} yaffs_CheckpointObject; +struct yaffs_checkpt_obj { + int struct_type; + u32 obj_id; + u32 parent_id; + int hdr_chunk; + enum yaffs_obj_type variant_type:3; + u8 deleted:1; + u8 soft_del:1; + u8 unlinked:1; + u8 fake:1; + u8 rename_allowed:1; + u8 unlink_allowed:1; + u8 serial; + int n_data_chunks; + u32 size_or_equiv_obj; +}; /*--------------------- Temporary buffers ---------------- * * These are chunk-sized working buffers. Each device has a few */ -typedef struct { - __u8 *buffer; - int line; /* track from whence this buffer was allocated */ - int maxLine; -} yaffs_TempBuffer; +struct yaffs_buffer { + u8 *buffer; + int line; /* track from whence this buffer was allocated */ + int max_line; +}; /*----------------- Device ---------------------------------*/ - -struct yaffs_DeviceParamStruct { - const char *name; +struct yaffs_param { + const YCHAR *name; /* - * Entry parameters set up way early. Yaffs sets up the rest. - * The structure should be zeroed out before use so that unused - * and defualt values are zero. - */ - - int inbandTags; /* Use unband tags */ - __u32 totalBytesPerChunk; /* Should be >= 512, does not need to be a power of 2 */ - int nChunksPerBlock; /* does not need to be a power of 2 */ - int spareBytesPerChunk; /* spare area size */ - int startBlock; /* Start block we're allowed to use */ - int endBlock; /* End block we're allowed to use */ - int nReservedBlocks; /* We want this tuneable so that we can reduce */ - /* reserved blocks on NOR and RAM. */ - - - int nShortOpCaches; /* If <= 0, then short op caching is disabled, else + * Entry parameters set up way early. Yaffs sets up the rest. + * The structure should be zeroed out before use so that unused + * and defualt values are zero. + */ + + int inband_tags; /* Use unband tags */ + u32 total_bytes_per_chunk; /* Should be >= 512, does not need to be a power of 2 */ + int chunks_per_block; /* does not need to be a power of 2 */ + int spare_bytes_per_chunk; /* spare area size */ + int start_block; /* Start block we're allowed to use */ + int end_block; /* End block we're allowed to use */ + int n_reserved_blocks; /* We want this tuneable so that we can reduce */ + /* reserved blocks on NOR and RAM. */ + + int n_caches; /* If <= 0, then short op caching is disabled, else * the number of short op caches (don't use too many). - * 10 to 20 is a good bet. + * 10 to 20 is a good bet. */ - int useNANDECC; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */ - int noTagsECC; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */ + int use_nand_ecc; /* Flag to decide whether or not to use NANDECC on data (yaffs1) */ + int no_tags_ecc; /* Flag to decide whether or not to do ECC on packed tags (yaffs2) */ - int isYaffs2; /* Use yaffs2 mode on this device */ + int is_yaffs2; /* Use yaffs2 mode on this device */ - int emptyLostAndFound; /* Auto-empty lost+found directory on mount */ + int empty_lost_n_found; /* Auto-empty lost+found directory on mount */ - int refreshPeriod; /* How often we should check to do a block refresh */ + int refresh_period; /* How often we should check to do a block refresh */ /* Checkpoint control. Can be set before or after initialisation */ - __u8 skipCheckpointRead; - __u8 skipCheckpointWrite; - - /* NAND access functions (Must be set before calling YAFFS)*/ - - int (*writeChunkToNAND) (struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 *data, - const yaffs_Spare *spare); - int (*readChunkFromNAND) (struct yaffs_DeviceStruct *dev, - int chunkInNAND, __u8 *data, - yaffs_Spare *spare); - int (*eraseBlockInNAND) (struct yaffs_DeviceStruct *dev, - int blockInNAND); - int (*initialiseNAND) (struct yaffs_DeviceStruct *dev); - int (*deinitialiseNAND) (struct yaffs_DeviceStruct *dev); + u8 skip_checkpt_rd; + u8 skip_checkpt_wr; + + int enable_xattr; /* Enable xattribs */ + + /* NAND access functions (Must be set before calling YAFFS) */ + + int (*write_chunk_fn) (struct yaffs_dev * dev, + int nand_chunk, const u8 * data, + const struct yaffs_spare * spare); + int (*read_chunk_fn) (struct yaffs_dev * dev, + int nand_chunk, u8 * data, + struct yaffs_spare * spare); + int (*erase_fn) (struct yaffs_dev * dev, int flash_block); + int (*initialise_flash_fn) (struct yaffs_dev * dev); + int (*deinitialise_flash_fn) (struct yaffs_dev * dev); #ifdef CONFIG_YAFFS_YAFFS2 - int (*writeChunkWithTagsToNAND) (struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 *data, - const yaffs_ExtendedTags *tags); - int (*readChunkWithTagsFromNAND) (struct yaffs_DeviceStruct *dev, - int chunkInNAND, __u8 *data, - yaffs_ExtendedTags *tags); - int (*markNANDBlockBad) (struct yaffs_DeviceStruct *dev, int blockNo); - int (*queryNANDBlock) (struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState *state, __u32 *sequenceNumber); + int (*write_chunk_tags_fn) (struct yaffs_dev * dev, + int nand_chunk, const u8 * data, + const struct yaffs_ext_tags * tags); + int (*read_chunk_tags_fn) (struct yaffs_dev * dev, + int nand_chunk, u8 * data, + struct yaffs_ext_tags * tags); + int (*bad_block_fn) (struct yaffs_dev * dev, int block_no); + int (*query_block_fn) (struct yaffs_dev * dev, int block_no, + enum yaffs_block_state * state, + u32 * seq_number); #endif - /* The removeObjectCallback function must be supplied by OS flavours that + /* The remove_obj_fn function must be supplied by OS flavours that * need it. - * yaffs direct uses it to implement the faster readdir. - * Linux uses it to protect the directory during unlocking. + * yaffs direct uses it to implement the faster readdir. + * Linux uses it to protect the directory during unlocking. */ - void (*removeObjectCallback)(struct yaffs_ObjectStruct *obj); + void (*remove_obj_fn) (struct yaffs_obj * obj); /* Callback to mark the superblock dirty */ - void (*markSuperBlockDirty)(struct yaffs_DeviceStruct *dev); - + void (*sb_dirty_fn) (struct yaffs_dev * dev); + /* Callback to control garbage collection. */ - unsigned (*gcControl)(struct yaffs_DeviceStruct *dev); - - /* Debug control flags. Don't use unless you know what you're doing */ - int useHeaderFileSize; /* Flag to determine if we should use file sizes from the header */ - int disableLazyLoad; /* Disable lazy loading on this device */ - int wideTnodesDisabled; /* Set to disable wide tnodes */ - int disableSoftDelete; /* yaffs 1 only: Set to disable the use of softdeletion. */ - - int deferDirectoryUpdate; /* Set to defer directory updates */ - + unsigned (*gc_control) (struct yaffs_dev * dev); + + /* Debug control flags. Don't use unless you know what you're doing */ + int use_header_file_size; /* Flag to determine if we should use file sizes from the header */ + int disable_lazy_load; /* Disable lazy loading on this device */ + int wide_tnodes_disabled; /* Set to disable wide tnodes */ + int disable_soft_del; /* yaffs 1 only: Set to disable the use of softdeletion. */ + + int defered_dir_update; /* Set to defer directory updates */ + +#ifdef CONFIG_YAFFS_AUTO_UNICODE + int auto_unicode; +#endif + int always_check_erased; /* Force chunk erased check always on */ }; -typedef struct yaffs_DeviceParamStruct yaffs_DeviceParam; +struct yaffs_dev { + struct yaffs_param param; -struct yaffs_DeviceStruct { - struct yaffs_DeviceParamStruct param; + /* Context storage. Holds extra OS specific data for this device */ - /* Context storage. Holds extra OS specific data for this device */ + void *os_context; + void *driver_context; - void *context; + struct list_head dev_list; /* Runtime parameters. Set up by YAFFS. */ - int nDataBytesPerChunk; + int data_bytes_per_chunk; - /* Non-wide tnode stuff */ - __u16 chunkGroupBits; /* Number of bits that need to be resolved if - * the tnodes are not wide enough. - */ - __u16 chunkGroupSize; /* == 2^^chunkGroupBits */ + /* Non-wide tnode stuff */ + u16 chunk_grp_bits; /* Number of bits that need to be resolved if + * the tnodes are not wide enough. + */ + u16 chunk_grp_size; /* == 2^^chunk_grp_bits */ /* Stuff to support wide tnodes */ - __u32 tnodeWidth; - __u32 tnodeMask; + u32 tnode_width; + u32 tnode_mask; + u32 tnode_size; /* Stuff for figuring out file offset to chunk conversions */ - __u32 chunkShift; /* Shift value */ - __u32 chunkDiv; /* Divisor after shifting: 1 for power-of-2 sizes */ - __u32 chunkMask; /* Mask to use for power-of-2 case */ - - - - int isMounted; - int readOnly; - int isCheckpointed; + u32 chunk_shift; /* Shift value */ + u32 chunk_div; /* Divisor after shifting: 1 for power-of-2 sizes */ + u32 chunk_mask; /* Mask to use for power-of-2 case */ + int is_mounted; + int read_only; + int is_checkpointed; /* Stuff to support block offsetting to support start block zero */ - int internalStartBlock; - int internalEndBlock; - int blockOffset; - int chunkOffset; - + int internal_start_block; + int internal_end_block; + int block_offset; + int chunk_offset; /* Runtime checkpointing stuff */ - int checkpointPageSequence; /* running sequence number of checkpoint pages */ - int checkpointByteCount; - int checkpointByteOffset; - __u8 *checkpointBuffer; - int checkpointOpenForWrite; - int blocksInCheckpoint; - int checkpointCurrentChunk; - int checkpointCurrentBlock; - int checkpointNextBlock; - int *checkpointBlockList; - int checkpointMaxBlocks; - __u32 checkpointSum; - __u32 checkpointXor; - - int nCheckpointBlocksRequired; /* Number of blocks needed to store current checkpoint set */ + int checkpt_page_seq; /* running sequence number of checkpoint pages */ + int checkpt_byte_count; + int checkpt_byte_offs; + u8 *checkpt_buffer; + int checkpt_open_write; + int blocks_in_checkpt; + int checkpt_cur_chunk; + int checkpt_cur_block; + int checkpt_next_block; + int *checkpt_block_list; + int checkpt_max_blocks; + u32 checkpt_sum; + u32 checkpt_xor; + + int checkpoint_blocks_required; /* Number of blocks needed to store current checkpoint set */ /* Block Info */ - yaffs_BlockInfo *blockInfo; - __u8 *chunkBits; /* bitmap of chunks in use */ - unsigned blockInfoAlt:1; /* was allocated using alternative strategy */ - unsigned chunkBitsAlt:1; /* was allocated using alternative strategy */ - int chunkBitmapStride; /* Number of bytes of chunkBits per block. - * Must be consistent with nChunksPerBlock. + struct yaffs_block_info *block_info; + u8 *chunk_bits; /* bitmap of chunks in use */ + unsigned block_info_alt:1; /* was allocated using alternative strategy */ + unsigned chunk_bits_alt:1; /* was allocated using alternative strategy */ + int chunk_bit_stride; /* Number of bytes of chunk_bits per block. + * Must be consistent with chunks_per_block. */ - int nErasedBlocks; - int allocationBlock; /* Current block being allocated off */ - __u32 allocationPage; - int allocationBlockFinder; /* Used to search for next allocation block */ + int n_erased_blocks; + int alloc_block; /* Current block being allocated off */ + u32 alloc_page; + int alloc_block_finder; /* Used to search for next allocation block */ - int nTnodesCreated; - yaffs_Tnode *freeTnodes; - int nFreeTnodes; - yaffs_TnodeList *allocatedTnodeList; + /* Object and Tnode memory management */ + void *allocator; + int n_obj; + int n_tnodes; - int nObjectsCreated; - yaffs_Object *freeObjects; - int nFreeObjects; + int n_hardlinks; - int nHardLinks; + struct yaffs_obj_bucket obj_bucket[YAFFS_NOBJECT_BUCKETS]; + u32 bucket_finder; - yaffs_ObjectList *allocatedObjectList; - - yaffs_ObjectBucket objectBucket[YAFFS_NOBJECT_BUCKETS]; - __u32 bucketFinder; - - int nFreeChunks; + int n_free_chunks; /* Garbage collection control */ - __u32 *gcCleanupList; /* objects to delete at the end of a GC. */ - - unsigned hasPendingPrioritisedGCs; /* We think this device might have pending prioritised gcs */ - unsigned gcDisable; - unsigned gcBlockFinder; - unsigned gcDirtiest; - unsigned gcPagesInUse; - unsigned gcNotDone; - unsigned gcBlock; - unsigned gcChunk; - unsigned gcSkip; + u32 *gc_cleanup_list; /* objects to delete at the end of a GC. */ + u32 n_clean_ups; + + unsigned has_pending_prioritised_gc; /* We think this device might have pending prioritised gcs */ + unsigned gc_disable; + unsigned gc_block_finder; + unsigned gc_dirtiest; + unsigned gc_pages_in_use; + unsigned gc_not_done; + unsigned gc_block; + unsigned gc_chunk; + unsigned gc_skip; /* Special directories */ - yaffs_Object *rootDir; - yaffs_Object *lostNFoundDir; + struct yaffs_obj *root_dir; + struct yaffs_obj *lost_n_found; /* Buffer areas for storing data to recover from write failures TODO - * __u8 bufferedData[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; - * yaffs_Spare bufferedSpare[YAFFS_CHUNKS_PER_BLOCK]; + * u8 buffered_data[YAFFS_CHUNKS_PER_BLOCK][YAFFS_BYTES_PER_CHUNK]; + * struct yaffs_spare buffered_spare[YAFFS_CHUNKS_PER_BLOCK]; */ - int bufferedBlock; /* Which block is buffered here? */ - int doingBufferedBlockRewrite; + int buffered_block; /* Which block is buffered here? */ + int doing_buffered_block_rewrite; - yaffs_ChunkCache *srCache; - int srLastUse; + struct yaffs_cache *cache; + int cache_last_use; - /* Stuff for background deletion and unlinked files.*/ - yaffs_Object *unlinkedDir; /* Directory where unlinked and deleted files live. */ - yaffs_Object *deletedDir; /* Directory where deleted objects are sent to disappear. */ - yaffs_Object *unlinkedDeletion; /* Current file being background deleted.*/ - int nDeletedFiles; /* Count of files awaiting deletion;*/ - int nUnlinkedFiles; /* Count of unlinked files. */ - int nBackgroundDeletions; /* Count of background deletions. */ + /* Stuff for background deletion and unlinked files. */ + struct yaffs_obj *unlinked_dir; /* Directory where unlinked and deleted files live. */ + struct yaffs_obj *del_dir; /* Directory where deleted objects are sent to disappear. */ + struct yaffs_obj *unlinked_deletion; /* Current file being background deleted. */ + int n_deleted_files; /* Count of files awaiting deletion; */ + int n_unlinked_files; /* Count of unlinked files. */ + int n_bg_deletions; /* Count of background deletions. */ /* Temporary buffer management */ - yaffs_TempBuffer tempBuffer[YAFFS_N_TEMP_BUFFERS]; - int maxTemp; - int tempInUse; - int unmanagedTempAllocations; - int unmanagedTempDeallocations; + struct yaffs_buffer temp_buffer[YAFFS_N_TEMP_BUFFERS]; + int max_temp; + int temp_in_use; + int unmanaged_buffer_allocs; + int unmanaged_buffer_deallocs; /* yaffs2 runtime stuff */ - unsigned sequenceNumber; /* Sequence number of currently allocating block */ - unsigned oldestDirtySequence; - unsigned oldestDirtyBlock; + unsigned seq_number; /* Sequence number of currently allocating block */ + unsigned oldest_dirty_seq; + unsigned oldest_dirty_block; /* Block refreshing */ - int refreshSkip; /* A skip down counter. Refresh happens when this gets to zero. */ + int refresh_skip; /* A skip down counter. Refresh happens when this gets to zero. */ /* Dirty directory handling */ - struct ylist_head dirtyDirectories; /* List of dirty directories */ - + struct list_head dirty_dirs; /* List of dirty directories */ /* Statistcs */ - __u32 nPageWrites; - __u32 nPageReads; - __u32 nBlockErasures; - __u32 nErasureFailures; - __u32 nGCCopies; - __u32 allGCs; - __u32 passiveGCs; - __u32 oldestDirtyGCs; - __u32 backgroundGCs; - __u32 nRetriedWrites; - __u32 nRetiredBlocks; - __u32 eccFixed; - __u32 eccUnfixed; - __u32 tagsEccFixed; - __u32 tagsEccUnfixed; - __u32 nDeletions; - __u32 nUnmarkedDeletions; - __u32 refreshCount; - __u32 cacheHits; + u32 n_page_writes; + u32 n_page_reads; + u32 n_erasures; + u32 n_erase_failures; + u32 n_gc_copies; + u32 all_gcs; + u32 passive_gc_count; + u32 oldest_dirty_gc_count; + u32 n_gc_blocks; + u32 bg_gcs; + u32 n_retired_writes; + u32 n_retired_blocks; + u32 n_ecc_fixed; + u32 n_ecc_unfixed; + u32 n_tags_ecc_fixed; + u32 n_tags_ecc_unfixed; + u32 n_deletions; + u32 n_unmarked_deletions; + u32 refresh_count; + u32 cache_hits; }; -typedef struct yaffs_DeviceStruct yaffs_Device; - -/* The static layout of block usage etc is stored in the super block header */ -typedef struct { - int StructType; - int version; - int checkpointStartBlock; - int checkpointEndBlock; - int startBlock; - int endBlock; - int rfu[100]; -} yaffs_SuperBlockHeader; - /* The CheckpointDevice structure holds the device information that changes at runtime and * must be preserved over unmount/mount cycles. */ -typedef struct { - int structType; - int nErasedBlocks; - int allocationBlock; /* Current block being allocated off */ - __u32 allocationPage; - int nFreeChunks; +struct yaffs_checkpt_dev { + int struct_type; + int n_erased_blocks; + int alloc_block; /* Current block being allocated off */ + u32 alloc_page; + int n_free_chunks; - int nDeletedFiles; /* Count of files awaiting deletion;*/ - int nUnlinkedFiles; /* Count of unlinked files. */ - int nBackgroundDeletions; /* Count of background deletions. */ + int n_deleted_files; /* Count of files awaiting deletion; */ + int n_unlinked_files; /* Count of unlinked files. */ + int n_bg_deletions; /* Count of background deletions. */ /* yaffs2 runtime stuff */ - unsigned sequenceNumber; /* Sequence number of currently allocating block */ + unsigned seq_number; /* Sequence number of currently allocating block */ -} yaffs_CheckpointDevice; +}; +struct yaffs_checkpt_validity { + int struct_type; + u32 magic; + u32 version; + u32 head; +}; -typedef struct { - int structType; - __u32 magic; - __u32 version; - __u32 head; -} yaffs_CheckpointValidity; +struct yaffs_shadow_fixer { + int obj_id; + int shadowed_id; + struct yaffs_shadow_fixer *next; +}; +/* Structure for doing xattr modifications */ +struct yaffs_xattr_mod { + int set; /* If 0 then this is a deletion */ + const YCHAR *name; + const void *data; + int size; + int flags; + int result; +}; /*----------------------- YAFFS Functions -----------------------*/ -int yaffs_GutsInitialise(yaffs_Device *dev); -void yaffs_Deinitialise(yaffs_Device *dev); - -int yaffs_GetNumberOfFreeChunks(yaffs_Device *dev); +int yaffs_guts_initialise(struct yaffs_dev *dev); +void yaffs_deinitialise(struct yaffs_dev *dev); -int yaffs_RenameObject(yaffs_Object *oldDir, const YCHAR *oldName, - yaffs_Object *newDir, const YCHAR *newName); +int yaffs_get_n_free_chunks(struct yaffs_dev *dev); -int yaffs_Unlink(yaffs_Object *dir, const YCHAR *name); -int yaffs_DeleteObject(yaffs_Object *obj); +int yaffs_rename_obj(struct yaffs_obj *old_dir, const YCHAR * old_name, + struct yaffs_obj *new_dir, const YCHAR * new_name); -int yaffs_GetObjectName(yaffs_Object *obj, YCHAR *name, int buffSize); -int yaffs_GetObjectFileLength(yaffs_Object *obj); -int yaffs_GetObjectInode(yaffs_Object *obj); -unsigned yaffs_GetObjectType(yaffs_Object *obj); -int yaffs_GetObjectLinkCount(yaffs_Object *obj); +int yaffs_unlinker(struct yaffs_obj *dir, const YCHAR * name); +int yaffs_del_obj(struct yaffs_obj *obj); -int yaffs_SetAttributes(yaffs_Object *obj, struct iattr *attr); -int yaffs_GetAttributes(yaffs_Object *obj, struct iattr *attr); +int yaffs_get_obj_name(struct yaffs_obj *obj, YCHAR * name, int buffer_size); +int yaffs_get_obj_length(struct yaffs_obj *obj); +int yaffs_get_obj_inode(struct yaffs_obj *obj); +unsigned yaffs_get_obj_type(struct yaffs_obj *obj); +int yaffs_get_obj_link_count(struct yaffs_obj *obj); /* File operations */ -int yaffs_ReadDataFromFile(yaffs_Object *obj, __u8 *buffer, loff_t offset, - int nBytes); -int yaffs_WriteDataToFile(yaffs_Object *obj, const __u8 *buffer, loff_t offset, - int nBytes, int writeThrough); -int yaffs_ResizeFile(yaffs_Object *obj, loff_t newSize); +int yaffs_file_rd(struct yaffs_obj *obj, u8 * buffer, loff_t offset, + int n_bytes); +int yaffs_wr_file(struct yaffs_obj *obj, const u8 * buffer, loff_t offset, + int n_bytes, int write_trhrough); +int yaffs_resize_file(struct yaffs_obj *obj, loff_t new_size); -yaffs_Object *yaffs_MknodFile(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid); +struct yaffs_obj *yaffs_create_file(struct yaffs_obj *parent, + const YCHAR * name, u32 mode, u32 uid, + u32 gid); -int yaffs_FlushFile(yaffs_Object *obj, int updateTime, int dataSync); +int yaffs_flush_file(struct yaffs_obj *obj, int update_time, int data_sync); /* Flushing and checkpointing */ -void yaffs_FlushEntireDeviceCache(yaffs_Device *dev); +void yaffs_flush_whole_cache(struct yaffs_dev *dev); -int yaffs_CheckpointSave(yaffs_Device *dev); -int yaffs_CheckpointRestore(yaffs_Device *dev); +int yaffs_checkpoint_save(struct yaffs_dev *dev); +int yaffs_checkpoint_restore(struct yaffs_dev *dev); /* Directory operations */ -yaffs_Object *yaffs_MknodDirectory(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid); -yaffs_Object *yaffs_FindObjectByName(yaffs_Object *theDir, const YCHAR *name); -int yaffs_ApplyToDirectoryChildren(yaffs_Object *theDir, - int (*fn) (yaffs_Object *)); - -yaffs_Object *yaffs_FindObjectByNumber(yaffs_Device *dev, __u32 number); +struct yaffs_obj *yaffs_create_dir(struct yaffs_obj *parent, const YCHAR * name, + u32 mode, u32 uid, u32 gid); +struct yaffs_obj *yaffs_find_by_name(struct yaffs_obj *the_dir, + const YCHAR * name); +struct yaffs_obj *yaffs_find_by_number(struct yaffs_dev *dev, u32 number); /* Link operations */ -yaffs_Object *yaffs_Link(yaffs_Object *parent, const YCHAR *name, - yaffs_Object *equivalentObject); +struct yaffs_obj *yaffs_link_obj(struct yaffs_obj *parent, const YCHAR * name, + struct yaffs_obj *equiv_obj); -yaffs_Object *yaffs_GetEquivalentObject(yaffs_Object *obj); +struct yaffs_obj *yaffs_get_equivalent_obj(struct yaffs_obj *obj); /* Symlink operations */ -yaffs_Object *yaffs_MknodSymLink(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid, - const YCHAR *alias); -YCHAR *yaffs_GetSymlinkAlias(yaffs_Object *obj); +struct yaffs_obj *yaffs_create_symlink(struct yaffs_obj *parent, + const YCHAR * name, u32 mode, u32 uid, + u32 gid, const YCHAR * alias); +YCHAR *yaffs_get_symlink_alias(struct yaffs_obj *obj); /* Special inodes (fifos, sockets and devices) */ -yaffs_Object *yaffs_MknodSpecial(yaffs_Object *parent, const YCHAR *name, - __u32 mode, __u32 uid, __u32 gid, __u32 rdev); +struct yaffs_obj *yaffs_create_special(struct yaffs_obj *parent, + const YCHAR * name, u32 mode, u32 uid, + u32 gid, u32 rdev); -/* Special directories */ -yaffs_Object *yaffs_Root(yaffs_Device *dev); -yaffs_Object *yaffs_LostNFound(yaffs_Device *dev); +int yaffs_set_xattrib(struct yaffs_obj *obj, const YCHAR * name, + const void *value, int size, int flags); +int yaffs_get_xattrib(struct yaffs_obj *obj, const YCHAR * name, void *value, + int size); +int yaffs_list_xattrib(struct yaffs_obj *obj, char *buffer, int size); +int yaffs_remove_xattrib(struct yaffs_obj *obj, const YCHAR * name); -#ifdef CONFIG_YAFFS_WINCE -/* CONFIG_YAFFS_WINCE special stuff */ -void yfsd_WinFileTimeNow(__u32 target[2]); -#endif +/* Special directories */ +struct yaffs_obj *yaffs_root(struct yaffs_dev *dev); +struct yaffs_obj *yaffs_lost_n_found(struct yaffs_dev *dev); -void yaffs_HandleDeferedFree(yaffs_Object *obj); +void yaffs_handle_defered_free(struct yaffs_obj *obj); -void yaffs_UpdateDirtyDirectories(yaffs_Device *dev); +void yaffs_update_dirty_dirs(struct yaffs_dev *dev); -int yaffs_BackgroundGarbageCollect(yaffs_Device *dev, unsigned urgency); +int yaffs_bg_gc(struct yaffs_dev *dev, unsigned urgency); /* Debug dump */ -int yaffs_DumpObject(yaffs_Object *obj); - -void yaffs_GutsTest(yaffs_Device *dev); - -/* A few useful functions */ -void yaffs_InitialiseTags(yaffs_ExtendedTags *tags); -void yaffs_DeleteChunk(yaffs_Device *dev, int chunkId, int markNAND, int lyn); -int yaffs_CheckFF(__u8 *buffer, int nBytes); -void yaffs_HandleChunkError(yaffs_Device *dev, yaffs_BlockInfo *bi); - -__u8 *yaffs_GetTempBuffer(yaffs_Device *dev, int lineNo); -void yaffs_ReleaseTempBuffer(yaffs_Device *dev, __u8 *buffer, int lineNo); - - +int yaffs_dump_obj(struct yaffs_obj *obj); + +void yaffs_guts_test(struct yaffs_dev *dev); + +/* A few useful functions to be used within the core files*/ +void yaffs_chunk_del(struct yaffs_dev *dev, int chunk_id, int mark_flash, + int lyn); +int yaffs_check_ff(u8 * buffer, int n_bytes); +void yaffs_handle_chunk_error(struct yaffs_dev *dev, + struct yaffs_block_info *bi); + +u8 *yaffs_get_temp_buffer(struct yaffs_dev *dev, int line_no); +void yaffs_release_temp_buffer(struct yaffs_dev *dev, u8 * buffer, int line_no); + +struct yaffs_obj *yaffs_find_or_create_by_number(struct yaffs_dev *dev, + int number, + enum yaffs_obj_type type); +int yaffs_put_chunk_in_file(struct yaffs_obj *in, int inode_chunk, + int nand_chunk, int in_scan); +void yaffs_set_obj_name(struct yaffs_obj *obj, const YCHAR * name); +void yaffs_set_obj_name_from_oh(struct yaffs_obj *obj, + const struct yaffs_obj_hdr *oh); +void yaffs_add_obj_to_dir(struct yaffs_obj *directory, struct yaffs_obj *obj); +YCHAR *yaffs_clone_str(const YCHAR * str); +void yaffs_link_fixup(struct yaffs_dev *dev, struct yaffs_obj *hard_list); +void yaffs_block_became_dirty(struct yaffs_dev *dev, int block_no); +int yaffs_update_oh(struct yaffs_obj *in, const YCHAR * name, + int force, int is_shrink, int shadows, + struct yaffs_xattr_mod *xop); +void yaffs_handle_shadowed_obj(struct yaffs_dev *dev, int obj_id, + int backward_scanning); +int yaffs_check_alloc_available(struct yaffs_dev *dev, int n_chunks); +struct yaffs_tnode *yaffs_get_tnode(struct yaffs_dev *dev); +struct yaffs_tnode *yaffs_add_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id, + struct yaffs_tnode *passed_tn); + +int yaffs_do_file_wr(struct yaffs_obj *in, const u8 * buffer, loff_t offset, + int n_bytes, int write_trhrough); +void yaffs_resize_file_down(struct yaffs_obj *obj, loff_t new_size); +void yaffs_skip_rest_of_block(struct yaffs_dev *dev); + +int yaffs_count_free_chunks(struct yaffs_dev *dev); + +struct yaffs_tnode *yaffs_find_tnode_0(struct yaffs_dev *dev, + struct yaffs_file_var *file_struct, + u32 chunk_id); + +u32 yaffs_get_group_base(struct yaffs_dev *dev, struct yaffs_tnode *tn, + unsigned pos); + +int yaffs_is_non_empty_dir(struct yaffs_obj *obj); #endif diff --git a/fs/yaffs2/yaffs_linux.h b/fs/yaffs2/yaffs_linux.h index 4434e6c497b..3b508cbc4e8 100644 --- a/fs/yaffs2/yaffs_linux.h +++ b/fs/yaffs2/yaffs_linux.h @@ -16,27 +16,26 @@ #ifndef __YAFFS_LINUX_H__ #define __YAFFS_LINUX_H__ -#include "devextras.h" #include "yportenv.h" -struct yaffs_LinuxContext { - struct ylist_head contextList; /* List of these we have mounted */ - struct yaffs_DeviceStruct *dev; - struct super_block * superBlock; - struct task_struct *bgThread; /* Background thread for this device */ - int bgRunning; - struct semaphore grossLock; /* Gross locking semaphore */ - __u8 *spareBuffer; /* For mtdif2 use. Don't know the size of the buffer +struct yaffs_linux_context { + struct list_head context_list; /* List of these we have mounted */ + struct yaffs_dev *dev; + struct super_block *super; + struct task_struct *bg_thread; /* Background thread for this device */ + int bg_running; + struct mutex gross_lock; /* Gross locking mutex*/ + u8 *spare_buffer; /* For mtdif2 use. Don't know the size of the buffer * at compile time so we have to allocate it. */ - struct mtd_info *mtd; - struct ylist_head searchContexts; - void (*putSuperFunc)(struct super_block *sb); + struct list_head search_contexts; + void (*put_super_fn) (struct super_block * sb); - struct task_struct *readdirProcess; + struct task_struct *readdir_process; + unsigned mount_id; }; -#define yaffs_DeviceToContext(dev) ((struct yaffs_LinuxContext *)((dev)->context)) +#define yaffs_dev_to_lc(dev) ((struct yaffs_linux_context *)((dev)->os_context)) +#define yaffs_dev_to_mtd(dev) ((struct mtd_info *)((dev)->driver_context)) #endif - diff --git a/fs/yaffs2/yaffs_mtdif.c b/fs/yaffs2/yaffs_mtdif.c index 5de3193ea2b..7cf53b3d91b 100644 --- a/fs/yaffs2/yaffs_mtdif.c +++ b/fs/yaffs2/yaffs_mtdif.c @@ -13,7 +13,6 @@ #include "yportenv.h" - #include "yaffs_mtdif.h" #include "linux/mtd/mtd.h" @@ -23,19 +22,19 @@ #include "yaffs_linux.h" -int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber) +int nandmtd_erase_block(struct yaffs_dev *dev, int block_no) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; - __u32 addr = - ((loff_t) blockNumber) * dev->param.totalBytesPerChunk - * dev->param.nChunksPerBlock; + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + u32 addr = + ((loff_t) block_no) * dev->param.total_bytes_per_chunk + * dev->param.chunks_per_block; struct erase_info ei; - + int retval = 0; ei.mtd = mtd; ei.addr = addr; - ei.len = dev->param.totalBytesPerChunk * dev->param.nChunksPerBlock; + ei.len = dev->param.total_bytes_per_chunk * dev->param.chunks_per_block; ei.time = 1000; ei.retries = 2; ei.callback = NULL; @@ -49,8 +48,7 @@ int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber) return YAFFS_FAIL; } -int nandmtd_InitialiseNAND(yaffs_Device *dev) +int nandmtd_initialise(struct yaffs_dev *dev) { return YAFFS_OK; } - diff --git a/fs/yaffs2/yaffs_mtdif.h b/fs/yaffs2/yaffs_mtdif.h index fad9d287061..666507417fe 100644 --- a/fs/yaffs2/yaffs_mtdif.h +++ b/fs/yaffs2/yaffs_mtdif.h @@ -18,10 +18,6 @@ #include "yaffs_guts.h" -#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 18)) -extern struct nand_oobinfo yaffs_oobinfo; -extern struct nand_oobinfo yaffs_noeccinfo; -#endif -int nandmtd_EraseBlockInNAND(yaffs_Device *dev, int blockNumber); -int nandmtd_InitialiseNAND(yaffs_Device *dev); +int nandmtd_erase_block(struct yaffs_dev *dev, int block_no); +int nandmtd_initialise(struct yaffs_dev *dev); #endif diff --git a/fs/yaffs2/yaffs_mtdif1.c b/fs/yaffs2/yaffs_mtdif1.c index aaa02db2f66..51083695eb3 100644 --- a/fs/yaffs2/yaffs_mtdif1.c +++ b/fs/yaffs2/yaffs_mtdif1.c @@ -1,10 +1,11 @@ /* * YAFFS: Yet another FFS. A NAND-flash specific file system. - * yaffs_mtdif1.c NAND mtd interface functions for small-page NAND. * * Copyright (C) 2002-2010 Aleph One Ltd. * for Toby Churchill Ltd and Brightstar Engineering * + * Created by Charles Manning <charles@aleph1.co.uk> + * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. @@ -18,16 +19,16 @@ * * These functions are invoked via function pointers in yaffs_nand.c. * This replaces functionality provided by functions in yaffs_mtdif.c - * and the yaffs_TagsCompatability functions in yaffs_tagscompat.c that are + * and the yaffs_tags compatability functions in yaffs_tagscompat.c that are * called in yaffs_mtdif.c when the function pointers are NULL. - * We assume the MTD layer is performing ECC (useNANDECC is true). + * We assume the MTD layer is performing ECC (use_nand_ecc is true). */ #include "yportenv.h" #include "yaffs_trace.h" #include "yaffs_guts.h" #include "yaffs_packedtags1.h" -#include "yaffs_tagscompat.h" /* for yaffs_CalcTagsECC */ +#include "yaffs_tagscompat.h" /* for yaffs_calc_tags_ecc */ #include "yaffs_linux.h" #include "linux/kernel.h" @@ -35,50 +36,24 @@ #include "linux/types.h" #include "linux/mtd/mtd.h" -/* Don't compile this module if we don't have MTD's mtd_oob_ops interface */ -#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) - #ifndef CONFIG_YAFFS_9BYTE_TAGS # define YTAG1_SIZE 8 #else # define YTAG1_SIZE 9 #endif -#if 0 -/* Use the following nand_ecclayout with MTD when using - * CONFIG_YAFFS_9BYTE_TAGS and the older on-NAND tags layout. - * If you have existing Yaffs images and the byte order differs from this, - * adjust 'oobfree' to match your existing Yaffs data. - * - * This nand_ecclayout scatters/gathers to/from the old-yaffs layout with the - * pageStatus byte (at NAND spare offset 4) scattered/gathered from/to - * the 9th byte. - * - * Old-style on-NAND format: T0,T1,T2,T3,P,B,T4,T5,E0,E1,E2,T6,T7,E3,E4,E5 - * We have/need PackedTags1 plus pageStatus: T0,T1,T2,T3,T4,T5,T6,T7,P - * where Tn are the tag bytes, En are MTD's ECC bytes, P is the pageStatus - * byte and B is the small-page bad-block indicator byte. - */ -static struct nand_ecclayout nand_oob_16 = { - .eccbytes = 6, - .eccpos = { 8, 9, 10, 13, 14, 15 }, - .oobavail = 9, - .oobfree = { { 0, 4 }, { 6, 2 }, { 11, 2 }, { 4, 1 } } -}; -#endif - /* Write a chunk (page) of data to NAND. * * Caller always provides ExtendedTags data which are converted to a more * compact (packed) form for storage in NAND. A mini-ECC runs over the * contents of the tags meta-data; used to valid the tags when read. * - * - Pack ExtendedTags to PackedTags1 form - * - Compute mini-ECC for PackedTags1 + * - Pack ExtendedTags to packed_tags1 form + * - Compute mini-ECC for packed_tags1 * - Write data and packed tags to NAND. * - * Note: Due to the use of the PackedTags1 meta-data which does not include - * a full sequence number (as found in the larger PackedTags2 form) it is + * Note: Due to the use of the packed_tags1 meta-data which does not include + * a full sequence number (as found in the larger packed_tags2 form) it is * necessary for Yaffs to re-write a chunk/page (just once) to mark it as * discarded and dirty. This is not ideal: newer NAND parts are supposed * to be written just once. When Yaffs performs this operation, this @@ -88,67 +63,68 @@ static struct nand_ecclayout nand_oob_16 = { * Any underlying MTD error results in YAFFS_FAIL. * Returns YAFFS_OK or YAFFS_FAIL. */ -int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, - int chunkInNAND, const __u8 *data, const yaffs_ExtendedTags *etags) +int nandmtd1_write_chunk_tags(struct yaffs_dev *dev, + int nand_chunk, const u8 * data, + const struct yaffs_ext_tags *etags) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; - int chunkBytes = dev->nDataBytesPerChunk; - loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int chunk_bytes = dev->data_bytes_per_chunk; + loff_t addr = ((loff_t) nand_chunk) * chunk_bytes; struct mtd_oob_ops ops; - yaffs_PackedTags1 pt1; + struct yaffs_packed_tags1 pt1; int retval; - /* we assume that PackedTags1 and yaffs_Tags are compatible */ - compile_time_assertion(sizeof(yaffs_PackedTags1) == 12); - compile_time_assertion(sizeof(yaffs_Tags) == 8); + /* we assume that packed_tags1 and struct yaffs_tags are compatible */ + compile_time_assertion(sizeof(struct yaffs_packed_tags1) == 12); + compile_time_assertion(sizeof(struct yaffs_tags) == 8); - yaffs_PackTags1(&pt1, etags); - yaffs_CalcTagsECC((yaffs_Tags *)&pt1); + yaffs_pack_tags1(&pt1, etags); + yaffs_calc_tags_ecc((struct yaffs_tags *)&pt1); /* When deleting a chunk, the upper layer provides only skeletal - * etags, one with chunkDeleted set. However, we need to update the + * etags, one with is_deleted set. However, we need to update the * tags, not erase them completely. So we use the NAND write property * that only zeroed-bits stick and set tag bytes to all-ones and * zero just the (not) deleted bit. */ #ifndef CONFIG_YAFFS_9BYTE_TAGS - if (etags->chunkDeleted) { + if (etags->is_deleted) { memset(&pt1, 0xff, 8); /* clear delete status bit to indicate deleted */ pt1.deleted = 0; } #else - ((__u8 *)&pt1)[8] = 0xff; - if (etags->chunkDeleted) { + ((u8 *) & pt1)[8] = 0xff; + if (etags->is_deleted) { memset(&pt1, 0xff, 8); - /* zero pageStatus byte to indicate deleted */ - ((__u8 *)&pt1)[8] = 0; + /* zero page_status byte to indicate deleted */ + ((u8 *) & pt1)[8] = 0; } #endif memset(&ops, 0, sizeof(ops)); ops.mode = MTD_OOB_AUTO; - ops.len = (data) ? chunkBytes : 0; + ops.len = (data) ? chunk_bytes : 0; ops.ooblen = YTAG1_SIZE; - ops.datbuf = (__u8 *)data; - ops.oobbuf = (__u8 *)&pt1; + ops.datbuf = (u8 *) data; + ops.oobbuf = (u8 *) & pt1; retval = mtd->write_oob(mtd, addr, &ops); if (retval) { - T(YAFFS_TRACE_MTD, - (TSTR("write_oob failed, chunk %d, mtd error %d"TENDSTR), - chunkInNAND, retval)); + yaffs_trace(YAFFS_TRACE_MTD, + "write_oob failed, chunk %d, mtd error %d", + nand_chunk, retval); } return retval ? YAFFS_FAIL : YAFFS_OK; } -/* Return with empty ExtendedTags but add eccResult. +/* Return with empty ExtendedTags but add ecc_result. */ -static int rettags(yaffs_ExtendedTags *etags, int eccResult, int retval) +static int rettags(struct yaffs_ext_tags *etags, int ecc_result, int retval) { if (etags) { memset(etags, 0, sizeof(*etags)); - etags->eccResult = eccResult; + etags->ecc_result = ecc_result; } return retval; } @@ -156,49 +132,44 @@ static int rettags(yaffs_ExtendedTags *etags, int eccResult, int retval) /* Read a chunk (page) from NAND. * * Caller expects ExtendedTags data to be usable even on error; that is, - * all members except eccResult and blockBad are zeroed. + * all members except ecc_result and block_bad are zeroed. * * - Check ECC results for data (if applicable) * - Check for blank/erased block (return empty ExtendedTags if blank) - * - Check the PackedTags1 mini-ECC (correct if necessary/possible) - * - Convert PackedTags1 to ExtendedTags - * - Update eccResult and blockBad members to refect state. + * - Check the packed_tags1 mini-ECC (correct if necessary/possible) + * - Convert packed_tags1 to ExtendedTags + * - Update ecc_result and block_bad members to refect state. * * Returns YAFFS_OK or YAFFS_FAIL. */ -int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, - int chunkInNAND, __u8 *data, yaffs_ExtendedTags *etags) +int nandmtd1_read_chunk_tags(struct yaffs_dev *dev, + int nand_chunk, u8 * data, + struct yaffs_ext_tags *etags) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; - int chunkBytes = dev->nDataBytesPerChunk; - loff_t addr = ((loff_t)chunkInNAND) * chunkBytes; + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int chunk_bytes = dev->data_bytes_per_chunk; + loff_t addr = ((loff_t) nand_chunk) * chunk_bytes; int eccres = YAFFS_ECC_RESULT_NO_ERROR; struct mtd_oob_ops ops; - yaffs_PackedTags1 pt1; + struct yaffs_packed_tags1 pt1; int retval; int deleted; memset(&ops, 0, sizeof(ops)); ops.mode = MTD_OOB_AUTO; - ops.len = (data) ? chunkBytes : 0; + ops.len = (data) ? chunk_bytes : 0; ops.ooblen = YTAG1_SIZE; ops.datbuf = data; - ops.oobbuf = (__u8 *)&pt1; + ops.oobbuf = (u8 *) & pt1; -#if (MTD_VERSION_CODE < MTD_VERSION(2, 6, 20)) - /* In MTD 2.6.18 to 2.6.19 nand_base.c:nand_do_read_oob() has a bug; - * help it out with ops.len = ops.ooblen when ops.datbuf == NULL. - */ - ops.len = (ops.datbuf) ? ops.len : ops.ooblen; -#endif /* Read page and oob using MTD. * Check status and determine ECC result. */ retval = mtd->read_oob(mtd, addr, &ops); if (retval) { - T(YAFFS_TRACE_MTD, - (TSTR("read_oob failed, chunk %d, mtd error %d"TENDSTR), - chunkInNAND, retval)); + yaffs_trace(YAFFS_TRACE_MTD, + "read_oob failed, chunk %d, mtd error %d", + nand_chunk, retval); } switch (retval) { @@ -209,26 +180,25 @@ int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, case -EUCLEAN: /* MTD's ECC fixed the data */ eccres = YAFFS_ECC_RESULT_FIXED; - dev->eccFixed++; + dev->n_ecc_fixed++; break; case -EBADMSG: /* MTD's ECC could not fix the data */ - dev->eccUnfixed++; + dev->n_ecc_unfixed++; /* fall into... */ default: rettags(etags, YAFFS_ECC_RESULT_UNFIXED, 0); - etags->blockBad = (mtd->block_isbad)(mtd, addr); + etags->block_bad = (mtd->block_isbad) (mtd, addr); return YAFFS_FAIL; } /* Check for a blank/erased chunk. */ - if (yaffs_CheckFF((__u8 *)&pt1, 8)) { - /* when blank, upper layers want eccResult to be <= NO_ERROR */ + if (yaffs_check_ff((u8 *) & pt1, 8)) { + /* when blank, upper layers want ecc_result to be <= NO_ERROR */ return rettags(etags, YAFFS_ECC_RESULT_NO_ERROR, YAFFS_OK); } - #ifndef CONFIG_YAFFS_9BYTE_TAGS /* Read deleted status (bit) then return it to it's non-deleted * state before performing tags mini-ECC check. pt1.deleted is @@ -237,37 +207,37 @@ int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, deleted = !pt1.deleted; pt1.deleted = 1; #else - deleted = (yaffs_CountBits(((__u8 *)&pt1)[8]) < 7); + deleted = (yaffs_count_bits(((u8 *) & pt1)[8]) < 7); #endif /* Check the packed tags mini-ECC and correct if necessary/possible. */ - retval = yaffs_CheckECCOnTags((yaffs_Tags *)&pt1); + retval = yaffs_check_tags_ecc((struct yaffs_tags *)&pt1); switch (retval) { case 0: /* no tags error, use MTD result */ break; case 1: /* recovered tags-ECC error */ - dev->tagsEccFixed++; + dev->n_tags_ecc_fixed++; if (eccres == YAFFS_ECC_RESULT_NO_ERROR) eccres = YAFFS_ECC_RESULT_FIXED; break; default: /* unrecovered tags-ECC error */ - dev->tagsEccUnfixed++; + dev->n_tags_ecc_unfixed++; return rettags(etags, YAFFS_ECC_RESULT_UNFIXED, YAFFS_FAIL); } /* Unpack the tags to extended form and set ECC result. - * [set shouldBeFF just to keep yaffs_UnpackTags1 happy] + * [set should_be_ff just to keep yaffs_unpack_tags1 happy] */ - pt1.shouldBeFF = 0xFFFFFFFF; - yaffs_UnpackTags1(etags, &pt1); - etags->eccResult = eccres; + pt1.should_be_ff = 0xFFFFFFFF; + yaffs_unpack_tags1(etags, &pt1); + etags->ecc_result = eccres; /* Set deleted state */ - etags->chunkDeleted = deleted; + etags->is_deleted = deleted; return YAFFS_OK; } @@ -278,15 +248,16 @@ int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, * * Returns YAFFS_OK or YAFFS_FAIL. */ -int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) +int nandmtd1_mark_block_bad(struct yaffs_dev *dev, int block_no) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; - int blocksize = dev->param.nChunksPerBlock * dev->nDataBytesPerChunk; + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int blocksize = dev->param.chunks_per_block * dev->data_bytes_per_chunk; int retval; - T(YAFFS_TRACE_BAD_BLOCKS,(TSTR("marking block %d bad"TENDSTR), blockNo)); + yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, + "marking block %d bad", block_no); - retval = mtd->block_markbad(mtd, (loff_t)blocksize * blockNo); + retval = mtd->block_markbad(mtd, (loff_t) blocksize * block_no); return (retval) ? YAFFS_FAIL : YAFFS_OK; } @@ -294,16 +265,16 @@ int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) * * Returns YAFFS_OK or YAFFS_FAIL. */ -static int nandmtd1_TestPrerequists(struct mtd_info *mtd) +static int nandmtd1_test_prerequists(struct mtd_info *mtd) { /* 2.6.18 has mtd->ecclayout->oobavail */ /* 2.6.21 has mtd->ecclayout->oobavail and mtd->oobavail */ int oobavail = mtd->ecclayout->oobavail; if (oobavail < YTAG1_SIZE) { - T(YAFFS_TRACE_ERROR, - (TSTR("mtd device has only %d bytes for tags, need %d"TENDSTR), - oobavail, YTAG1_SIZE)); + yaffs_trace(YAFFS_TRACE_ERROR, + "mtd device has only %d bytes for tags, need %d", + oobavail, YTAG1_SIZE); return YAFFS_FAIL; } return YAFFS_OK; @@ -318,13 +289,13 @@ static int nandmtd1_TestPrerequists(struct mtd_info *mtd) * * Always returns YAFFS_OK. */ -int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState *pState, __u32 *pSequenceNumber) +int nandmtd1_query_block(struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state_ptr, u32 * seq_ptr) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; - int chunkNo = blockNo * dev->param.nChunksPerBlock; - loff_t addr = (loff_t)chunkNo * dev->nDataBytesPerChunk; - yaffs_ExtendedTags etags; + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); + int chunk_num = block_no * dev->param.chunks_per_block; + loff_t addr = (loff_t) chunk_num * dev->data_bytes_per_chunk; + struct yaffs_ext_tags etags; int state = YAFFS_BLOCK_STATE_DEAD; int seqnum = 0; int retval; @@ -332,30 +303,28 @@ int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, /* We don't yet have a good place to test for MTD config prerequists. * Do it here as we are called during the initial scan. */ - if (nandmtd1_TestPrerequists(mtd) != YAFFS_OK) + if (nandmtd1_test_prerequists(mtd) != YAFFS_OK) return YAFFS_FAIL; - retval = nandmtd1_ReadChunkWithTagsFromNAND(dev, chunkNo, NULL, &etags); - etags.blockBad = (mtd->block_isbad)(mtd, addr); - if (etags.blockBad) { - T(YAFFS_TRACE_BAD_BLOCKS, - (TSTR("block %d is marked bad"TENDSTR), blockNo)); + retval = nandmtd1_read_chunk_tags(dev, chunk_num, NULL, &etags); + etags.block_bad = (mtd->block_isbad) (mtd, addr); + if (etags.block_bad) { + yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, + "block %d is marked bad", block_no); state = YAFFS_BLOCK_STATE_DEAD; - } else if (etags.eccResult != YAFFS_ECC_RESULT_NO_ERROR) { + } else if (etags.ecc_result != YAFFS_ECC_RESULT_NO_ERROR) { /* bad tags, need to look more closely */ state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - } else if (etags.chunkUsed) { + } else if (etags.chunk_used) { state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; - seqnum = etags.sequenceNumber; + seqnum = etags.seq_number; } else { state = YAFFS_BLOCK_STATE_EMPTY; } - *pState = state; - *pSequenceNumber = seqnum; + *state_ptr = state; + *seq_ptr = seqnum; /* query always succeeds */ return YAFFS_OK; } - -#endif /*MTD_VERSION*/ diff --git a/fs/yaffs2/yaffs_mtdif1.h b/fs/yaffs2/yaffs_mtdif1.h index 0e6a56fbd54..07ce4524f0f 100644 --- a/fs/yaffs2/yaffs_mtdif1.h +++ b/fs/yaffs2/yaffs_mtdif1.h @@ -14,15 +14,16 @@ #ifndef __YAFFS_MTDIF1_H__ #define __YAFFS_MTDIF1_H__ -int nandmtd1_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND, - const __u8 *data, const yaffs_ExtendedTags *tags); +int nandmtd1_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + const u8 * data, + const struct yaffs_ext_tags *tags); -int nandmtd1_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, - __u8 *data, yaffs_ExtendedTags *tags); +int nandmtd1_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + u8 * data, struct yaffs_ext_tags *tags); -int nandmtd1_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); +int nandmtd1_mark_block_bad(struct yaffs_dev *dev, int block_no); -int nandmtd1_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState *state, __u32 *sequenceNumber); +int nandmtd1_query_block(struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state, u32 * seq_number); #endif diff --git a/fs/yaffs2/yaffs_mtdif2.c b/fs/yaffs2/yaffs_mtdif2.c index c1d44781997..d1643df2c38 100644 --- a/fs/yaffs2/yaffs_mtdif2.c +++ b/fs/yaffs2/yaffs_mtdif2.c @@ -27,35 +27,31 @@ #include "yaffs_linux.h" /* NB For use with inband tags.... - * We assume that the data buffer is of size totalBytersPerChunk so that we can also + * We assume that the data buffer is of size total_bytes_per_chunk so that we can also * use it to load the tags. */ -int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND, - const __u8 *data, - const yaffs_ExtendedTags *tags) +int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + const u8 * data, + const struct yaffs_ext_tags *tags) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; -#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); struct mtd_oob_ops ops; -#else - size_t dummy; -#endif int retval = 0; loff_t addr; - yaffs_PackedTags2 pt; - - int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt); - void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t : (void *)&pt; + struct yaffs_packed_tags2 pt; - T(YAFFS_TRACE_MTD, - (TSTR - ("nandmtd2_WriteChunkWithTagsToNAND chunk %d data %p tags %p" - TENDSTR), chunkInNAND, data, tags)); + int packed_tags_size = + dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); + void *packed_tags_ptr = + dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_write_chunk_tags chunk %d data %p tags %p", + nand_chunk, data, tags); - addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk; + addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; /* For yaffs2 writing there must be both data and tags. * If we're using inband tags, then the tags are stuffed into @@ -63,129 +59,105 @@ int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND, */ if (!data || !tags) BUG(); - else if (dev->param.inbandTags) { - yaffs_PackedTags2TagsPart *pt2tp; - pt2tp = (yaffs_PackedTags2TagsPart *)(data + dev->nDataBytesPerChunk); - yaffs_PackTags2TagsPart(pt2tp, tags); - } else - yaffs_PackTags2(&pt, tags, !dev->param.noTagsECC); - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) + else if (dev->param.inband_tags) { + struct yaffs_packed_tags2_tags_only *pt2tp; + pt2tp = + (struct yaffs_packed_tags2_tags_only *)(data + + dev-> + data_bytes_per_chunk); + yaffs_pack_tags2_tags_only(pt2tp, tags); + } else { + yaffs_pack_tags2(&pt, tags, !dev->param.no_tags_ecc); + } + ops.mode = MTD_OOB_AUTO; - ops.ooblen = (dev->param.inbandTags) ? 0 : packed_tags_size; - ops.len = dev->param.totalBytesPerChunk; + ops.ooblen = (dev->param.inband_tags) ? 0 : packed_tags_size; + ops.len = dev->param.total_bytes_per_chunk; ops.ooboffs = 0; - ops.datbuf = (__u8 *)data; - ops.oobbuf = (dev->param.inbandTags) ? NULL : packed_tags_ptr; + ops.datbuf = (u8 *) data; + ops.oobbuf = (dev->param.inband_tags) ? NULL : packed_tags_ptr; retval = mtd->write_oob(mtd, addr, &ops); -#else - if (!dev->param.inbandTags) { - retval = - mtd->write_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, (__u8 *) packed_tags_ptr, NULL); - } else { - retval = - mtd->write(mtd, addr, dev->param.totalBytesPerChunk, &dummy, - data); - } -#endif - if (retval == 0) return YAFFS_OK; else return YAFFS_FAIL; } -int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, - __u8 *data, yaffs_ExtendedTags *tags) +int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + u8 * data, struct yaffs_ext_tags *tags) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; -#if (MTD_VERSION_CODE > MTD_VERSION(2, 6, 17)) + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); struct mtd_oob_ops ops; -#endif + size_t dummy; int retval = 0; - int localData = 0; + int local_data = 0; - loff_t addr = ((loff_t) chunkInNAND) * dev->param.totalBytesPerChunk; + loff_t addr = ((loff_t) nand_chunk) * dev->param.total_bytes_per_chunk; - yaffs_PackedTags2 pt; + struct yaffs_packed_tags2 pt; - int packed_tags_size = dev->param.noTagsECC ? sizeof(pt.t) : sizeof(pt); - void * packed_tags_ptr = dev->param.noTagsECC ? (void *) &pt.t: (void *)&pt; + int packed_tags_size = + dev->param.no_tags_ecc ? sizeof(pt.t) : sizeof(pt); + void *packed_tags_ptr = + dev->param.no_tags_ecc ? (void *)&pt.t : (void *)&pt; - T(YAFFS_TRACE_MTD, - (TSTR - ("nandmtd2_ReadChunkWithTagsFromNAND chunk %d data %p tags %p" - TENDSTR), chunkInNAND, data, tags)); + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_read_chunk_tags chunk %d data %p tags %p", + nand_chunk, data, tags); - if (dev->param.inbandTags) { + if (dev->param.inband_tags) { if (!data) { - localData = 1; - data = yaffs_GetTempBuffer(dev, __LINE__); + local_data = 1; + data = yaffs_get_temp_buffer(dev, __LINE__); } - } - -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 17)) - if (dev->param.inbandTags || (data && !tags)) - retval = mtd->read(mtd, addr, dev->param.totalBytesPerChunk, - &dummy, data); + if (dev->param.inband_tags || (data && !tags)) + retval = mtd->read(mtd, addr, dev->param.total_bytes_per_chunk, + &dummy, data); else if (tags) { ops.mode = MTD_OOB_AUTO; ops.ooblen = packed_tags_size; - ops.len = data ? dev->nDataBytesPerChunk : packed_tags_size; + ops.len = data ? dev->data_bytes_per_chunk : packed_tags_size; ops.ooboffs = 0; ops.datbuf = data; - ops.oobbuf = yaffs_DeviceToContext(dev)->spareBuffer; + ops.oobbuf = yaffs_dev_to_lc(dev)->spare_buffer; retval = mtd->read_oob(mtd, addr, &ops); } -#else - if (!dev->param.inbandTags && data && tags) { - retval = mtd->read_ecc(mtd, addr, dev->nDataBytesPerChunk, - &dummy, data, dev->spareBuffer, - NULL); - } else { - if (data) - retval = - mtd->read(mtd, addr, dev->nDataBytesPerChunk, &dummy, - data); - if (!dev->param.inbandTags && tags) - retval = - mtd->read_oob(mtd, addr, mtd->oobsize, &dummy, - dev->spareBuffer); - } -#endif - - - if (dev->param.inbandTags) { + if (dev->param.inband_tags) { if (tags) { - yaffs_PackedTags2TagsPart *pt2tp; - pt2tp = (yaffs_PackedTags2TagsPart *)&data[dev->nDataBytesPerChunk]; - yaffs_UnpackTags2TagsPart(tags, pt2tp); + struct yaffs_packed_tags2_tags_only *pt2tp; + pt2tp = + (struct yaffs_packed_tags2_tags_only *)&data[dev-> + data_bytes_per_chunk]; + yaffs_unpack_tags2_tags_only(tags, pt2tp); } } else { if (tags) { - memcpy(packed_tags_ptr, yaffs_DeviceToContext(dev)->spareBuffer, packed_tags_size); - yaffs_UnpackTags2(tags, &pt, !dev->param.noTagsECC); + memcpy(packed_tags_ptr, + yaffs_dev_to_lc(dev)->spare_buffer, + packed_tags_size); + yaffs_unpack_tags2(tags, &pt, !dev->param.no_tags_ecc); } } - if (localData) - yaffs_ReleaseTempBuffer(dev, data, __LINE__); + if (local_data) + yaffs_release_temp_buffer(dev, data, __LINE__); - if (tags && retval == -EBADMSG && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) { - tags->eccResult = YAFFS_ECC_RESULT_UNFIXED; - dev->eccUnfixed++; + if (tags && retval == -EBADMSG + && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { + tags->ecc_result = YAFFS_ECC_RESULT_UNFIXED; + dev->n_ecc_unfixed++; } - if(tags && retval == -EUCLEAN && tags->eccResult == YAFFS_ECC_RESULT_NO_ERROR) { - tags->eccResult = YAFFS_ECC_RESULT_FIXED; - dev->eccFixed++; + if (tags && retval == -EUCLEAN + && tags->ecc_result == YAFFS_ECC_RESULT_NO_ERROR) { + tags->ecc_result = YAFFS_ECC_RESULT_FIXED; + dev->n_ecc_fixed++; } if (retval == 0) return YAFFS_OK; @@ -193,17 +165,17 @@ int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, return YAFFS_FAIL; } -int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) +int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); int retval; - T(YAFFS_TRACE_MTD, - (TSTR("nandmtd2_MarkNANDBlockBad %d" TENDSTR), blockNo)); + yaffs_trace(YAFFS_TRACE_MTD, + "nandmtd2_mark_block_bad %d", block_no); retval = mtd->block_markbad(mtd, - blockNo * dev->param.nChunksPerBlock * - dev->param.totalBytesPerChunk); + block_no * dev->param.chunks_per_block * + dev->param.total_bytes_per_chunk); if (retval == 0) return YAFFS_OK; @@ -212,42 +184,38 @@ int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo) } -int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState *state, __u32 *sequenceNumber) +int nandmtd2_query_block(struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state, u32 * seq_number) { - struct mtd_info *mtd = yaffs_DeviceToContext(dev)->mtd; + struct mtd_info *mtd = yaffs_dev_to_mtd(dev); int retval; - T(YAFFS_TRACE_MTD, - (TSTR("nandmtd2_QueryNANDBlock %d" TENDSTR), blockNo)); + yaffs_trace(YAFFS_TRACE_MTD, "nandmtd2_query_block %d", block_no); retval = mtd->block_isbad(mtd, - blockNo * dev->param.nChunksPerBlock * - dev->param.totalBytesPerChunk); + block_no * dev->param.chunks_per_block * + dev->param.total_bytes_per_chunk); if (retval) { - T(YAFFS_TRACE_MTD, (TSTR("block is bad" TENDSTR))); + yaffs_trace(YAFFS_TRACE_MTD, "block is bad"); *state = YAFFS_BLOCK_STATE_DEAD; - *sequenceNumber = 0; + *seq_number = 0; } else { - yaffs_ExtendedTags t; - nandmtd2_ReadChunkWithTagsFromNAND(dev, - blockNo * - dev->param.nChunksPerBlock, NULL, - &t); - - if (t.chunkUsed) { - *sequenceNumber = t.sequenceNumber; + struct yaffs_ext_tags t; + nandmtd2_read_chunk_tags(dev, block_no * + dev->param.chunks_per_block, NULL, &t); + + if (t.chunk_used) { + *seq_number = t.seq_number; *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; } else { - *sequenceNumber = 0; + *seq_number = 0; *state = YAFFS_BLOCK_STATE_EMPTY; } } - T(YAFFS_TRACE_MTD, - (TSTR("block is bad seq %d state %d" TENDSTR), *sequenceNumber, - *state)); + yaffs_trace(YAFFS_TRACE_MTD, + "block is bad seq %d state %d", *seq_number, *state); if (retval == 0) return YAFFS_OK; diff --git a/fs/yaffs2/yaffs_mtdif2.h b/fs/yaffs2/yaffs_mtdif2.h index 5691267eafa..d82112610d0 100644 --- a/fs/yaffs2/yaffs_mtdif2.h +++ b/fs/yaffs2/yaffs_mtdif2.h @@ -17,13 +17,13 @@ #define __YAFFS_MTDIF2_H__ #include "yaffs_guts.h" -int nandmtd2_WriteChunkWithTagsToNAND(yaffs_Device *dev, int chunkInNAND, - const __u8 *data, - const yaffs_ExtendedTags *tags); -int nandmtd2_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, - __u8 *data, yaffs_ExtendedTags *tags); -int nandmtd2_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int nandmtd2_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState *state, __u32 *sequenceNumber); +int nandmtd2_write_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + const u8 * data, + const struct yaffs_ext_tags *tags); +int nandmtd2_read_chunk_tags(struct yaffs_dev *dev, int nand_chunk, + u8 * data, struct yaffs_ext_tags *tags); +int nandmtd2_mark_block_bad(struct yaffs_dev *dev, int block_no); +int nandmtd2_query_block(struct yaffs_dev *dev, int block_no, + enum yaffs_block_state *state, u32 * seq_number); #endif diff --git a/fs/yaffs2/yaffs_nameval.c b/fs/yaffs2/yaffs_nameval.c new file mode 100644 index 00000000000..daa36f989d3 --- /dev/null +++ b/fs/yaffs2/yaffs_nameval.c @@ -0,0 +1,201 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* + * This simple implementation of a name-value store assumes a small number of values and fits + * into a small finite buffer. + * + * Each attribute is stored as a record: + * sizeof(int) bytes record size. + * strnlen+1 bytes name null terminated. + * nbytes value. + * ---------- + * total size stored in record size + * + * This code has not been tested with unicode yet. + */ + +#include "yaffs_nameval.h" + +#include "yportenv.h" + +static int nval_find(const char *xb, int xb_size, const YCHAR * name, + int *exist_size) +{ + int pos = 0; + int size; + + memcpy(&size, xb, sizeof(int)); + while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { + if (strncmp + ((YCHAR *) (xb + pos + sizeof(int)), name, size) == 0) { + if (exist_size) + *exist_size = size; + return pos; + } + pos += size; + if (pos < xb_size - sizeof(int)) + memcpy(&size, xb + pos, sizeof(int)); + else + size = 0; + } + if (exist_size) + *exist_size = 0; + return -1; +} + +static int nval_used(const char *xb, int xb_size) +{ + int pos = 0; + int size; + + memcpy(&size, xb + pos, sizeof(int)); + while (size > 0 && (size < xb_size) && (pos + size < xb_size)) { + pos += size; + if (pos < xb_size - sizeof(int)) + memcpy(&size, xb + pos, sizeof(int)); + else + size = 0; + } + return pos; +} + +int nval_del(char *xb, int xb_size, const YCHAR * name) +{ + int pos = nval_find(xb, xb_size, name, NULL); + int size; + + if (pos >= 0 && pos < xb_size) { + /* Find size, shift rest over this record, then zero out the rest of buffer */ + memcpy(&size, xb + pos, sizeof(int)); + memcpy(xb + pos, xb + pos + size, xb_size - (pos + size)); + memset(xb + (xb_size - size), 0, size); + return 0; + } else { + return -ENODATA; + } +} + +int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf, + int bsize, int flags) +{ + int pos; + int namelen = strnlen(name, xb_size); + int reclen; + int size_exist = 0; + int space; + int start; + + pos = nval_find(xb, xb_size, name, &size_exist); + + if (flags & XATTR_CREATE && pos >= 0) + return -EEXIST; + if (flags & XATTR_REPLACE && pos < 0) + return -ENODATA; + + start = nval_used(xb, xb_size); + space = xb_size - start + size_exist; + + reclen = (sizeof(int) + namelen + 1 + bsize); + + if (reclen > space) + return -ENOSPC; + + if (pos >= 0) { + nval_del(xb, xb_size, name); + start = nval_used(xb, xb_size); + } + + pos = start; + + memcpy(xb + pos, &reclen, sizeof(int)); + pos += sizeof(int); + strncpy((YCHAR *) (xb + pos), name, reclen); + pos += (namelen + 1); + memcpy(xb + pos, buf, bsize); + return 0; +} + +int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, + int bsize) +{ + int pos = nval_find(xb, xb_size, name, NULL); + int size; + + if (pos >= 0 && pos < xb_size) { + + memcpy(&size, xb + pos, sizeof(int)); + pos += sizeof(int); /* advance past record length */ + size -= sizeof(int); + + /* Advance over name string */ + while (xb[pos] && size > 0 && pos < xb_size) { + pos++; + size--; + } + /*Advance over NUL */ + pos++; + size--; + + if (size <= bsize) { + memcpy(buf, xb + pos, size); + return size; + } + + } + if (pos >= 0) + return -ERANGE; + else + return -ENODATA; +} + +int nval_list(const char *xb, int xb_size, char *buf, int bsize) +{ + int pos = 0; + int size; + int name_len; + int ncopied = 0; + int filled = 0; + + memcpy(&size, xb + pos, sizeof(int)); + while (size > sizeof(int) && size <= xb_size && (pos + size) < xb_size + && !filled) { + pos += sizeof(int); + size -= sizeof(int); + name_len = strnlen((YCHAR *) (xb + pos), size); + if (ncopied + name_len + 1 < bsize) { + memcpy(buf, xb + pos, name_len * sizeof(YCHAR)); + buf += name_len; + *buf = '\0'; + buf++; + if (sizeof(YCHAR) > 1) { + *buf = '\0'; + buf++; + } + ncopied += (name_len + 1); + } else { + filled = 1; + } + pos += size; + if (pos < xb_size - sizeof(int)) + memcpy(&size, xb + pos, sizeof(int)); + else + size = 0; + } + return ncopied; +} + +int nval_hasvalues(const char *xb, int xb_size) +{ + return nval_used(xb, xb_size) > 0; +} diff --git a/fs/yaffs2/yaffs_qsort.h b/fs/yaffs2/yaffs_nameval.h index a24d58e3758..2bb02b62762 100644 --- a/fs/yaffs2/yaffs_qsort.h +++ b/fs/yaffs2/yaffs_nameval.h @@ -13,11 +13,16 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ +#ifndef __NAMEVAL_H__ +#define __NAMEVAL_H__ -#ifndef __YAFFS_QSORT_H__ -#define __YAFFS_QSORT_H__ - -extern void yaffs_qsort(void *const base, size_t total_elems, size_t size, - int (*cmp)(const void *, const void *)); +#include "yportenv.h" +int nval_del(char *xb, int xb_size, const YCHAR * name); +int nval_set(char *xb, int xb_size, const YCHAR * name, const char *buf, + int bsize, int flags); +int nval_get(const char *xb, int xb_size, const YCHAR * name, char *buf, + int bsize); +int nval_list(const char *xb, int xb_size, char *buf, int bsize); +int nval_hasvalues(const char *xb, int xb_size); #endif diff --git a/fs/yaffs2/yaffs_nand.c b/fs/yaffs2/yaffs_nand.c index 6964ad18c0d..e816cabf43f 100644 --- a/fs/yaffs2/yaffs_nand.c +++ b/fs/yaffs2/yaffs_nand.c @@ -17,124 +17,111 @@ #include "yaffs_getblockinfo.h" -int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, - __u8 *buffer, - yaffs_ExtendedTags *tags) +int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, + u8 * buffer, struct yaffs_ext_tags *tags) { int result; - yaffs_ExtendedTags localTags; + struct yaffs_ext_tags local_tags; - int realignedChunkInNAND = chunkInNAND - dev->chunkOffset; + int realigned_chunk = nand_chunk - dev->chunk_offset; - dev->nPageReads++; + dev->n_page_reads++; /* If there are no tags provided, use local tags to get prioritised gc working */ if (!tags) - tags = &localTags; + tags = &local_tags; - if (dev->param.readChunkWithTagsFromNAND) - result = dev->param.readChunkWithTagsFromNAND(dev, realignedChunkInNAND, buffer, - tags); + if (dev->param.read_chunk_tags_fn) + result = + dev->param.read_chunk_tags_fn(dev, realigned_chunk, buffer, + tags); else - result = yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(dev, - realignedChunkInNAND, - buffer, - tags); - if (tags && - tags->eccResult > YAFFS_ECC_RESULT_NO_ERROR) { - - yaffs_BlockInfo *bi; - bi = yaffs_GetBlockInfo(dev, chunkInNAND/dev->param.nChunksPerBlock); - yaffs_HandleChunkError(dev, bi); + result = yaffs_tags_compat_rd(dev, + realigned_chunk, buffer, tags); + if (tags && tags->ecc_result > YAFFS_ECC_RESULT_NO_ERROR) { + + struct yaffs_block_info *bi; + bi = yaffs_get_block_info(dev, + nand_chunk / + dev->param.chunks_per_block); + yaffs_handle_chunk_error(dev, bi); } return result; } -int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev, - int chunkInNAND, - const __u8 *buffer, - yaffs_ExtendedTags *tags) +int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, + int nand_chunk, + const u8 * buffer, struct yaffs_ext_tags *tags) { - dev->nPageWrites++; - - chunkInNAND -= dev->chunkOffset; + dev->n_page_writes++; + nand_chunk -= dev->chunk_offset; if (tags) { - tags->sequenceNumber = dev->sequenceNumber; - tags->chunkUsed = 1; - if (!yaffs_ValidateTags(tags)) { - T(YAFFS_TRACE_ERROR, - (TSTR("Writing uninitialised tags" TENDSTR))); + tags->seq_number = dev->seq_number; + tags->chunk_used = 1; + if (!yaffs_validate_tags(tags)) { + yaffs_trace(YAFFS_TRACE_ERROR, "Writing uninitialised tags"); YBUG(); } - T(YAFFS_TRACE_WRITE, - (TSTR("Writing chunk %d tags %d %d" TENDSTR), chunkInNAND, - tags->objectId, tags->chunkId)); + yaffs_trace(YAFFS_TRACE_WRITE, + "Writing chunk %d tags %d %d", + nand_chunk, tags->obj_id, tags->chunk_id); } else { - T(YAFFS_TRACE_ERROR, (TSTR("Writing with no tags" TENDSTR))); + yaffs_trace(YAFFS_TRACE_ERROR, "Writing with no tags"); YBUG(); } - if (dev->param.writeChunkWithTagsToNAND) - return dev->param.writeChunkWithTagsToNAND(dev, chunkInNAND, buffer, - tags); + if (dev->param.write_chunk_tags_fn) + return dev->param.write_chunk_tags_fn(dev, nand_chunk, buffer, + tags); else - return yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(dev, - chunkInNAND, - buffer, - tags); + return yaffs_tags_compat_wr(dev, nand_chunk, buffer, tags); } -int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo) +int yaffs_mark_bad(struct yaffs_dev *dev, int block_no) { - blockNo -= dev->blockOffset; - + block_no -= dev->block_offset; - if (dev->param.markNANDBlockBad) - return dev->param.markNANDBlockBad(dev, blockNo); + if (dev->param.bad_block_fn) + return dev->param.bad_block_fn(dev, block_no); else - return yaffs_TagsCompatabilityMarkNANDBlockBad(dev, blockNo); + return yaffs_tags_compat_mark_bad(dev, block_no); } -int yaffs_QueryInitialBlockState(yaffs_Device *dev, - int blockNo, - yaffs_BlockState *state, - __u32 *sequenceNumber) +int yaffs_query_init_block_state(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + u32 * seq_number) { - blockNo -= dev->blockOffset; + block_no -= dev->block_offset; - if (dev->param.queryNANDBlock) - return dev->param.queryNANDBlock(dev, blockNo, state, sequenceNumber); + if (dev->param.query_block_fn) + return dev->param.query_block_fn(dev, block_no, state, + seq_number); else - return yaffs_TagsCompatabilityQueryNANDBlock(dev, blockNo, - state, - sequenceNumber); + return yaffs_tags_compat_query_block(dev, block_no, + state, seq_number); } - -int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND) +int yaffs_erase_block(struct yaffs_dev *dev, int flash_block) { int result; - blockInNAND -= dev->blockOffset; + flash_block -= dev->block_offset; - dev->nBlockErasures++; + dev->n_erasures++; - result = dev->param.eraseBlockInNAND(dev, blockInNAND); + result = dev->param.erase_fn(dev, flash_block); return result; } -int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev) +int yaffs_init_nand(struct yaffs_dev *dev) { - if(dev->param.initialiseNAND) - return dev->param.initialiseNAND(dev); + if (dev->param.initialise_flash_fn) + return dev->param.initialise_flash_fn(dev); return YAFFS_OK; } - - - diff --git a/fs/yaffs2/yaffs_nand.h b/fs/yaffs2/yaffs_nand.h index 62a466596c5..543f1987124 100644 --- a/fs/yaffs2/yaffs_nand.h +++ b/fs/yaffs2/yaffs_nand.h @@ -17,28 +17,22 @@ #define __YAFFS_NAND_H__ #include "yaffs_guts.h" +int yaffs_rd_chunk_tags_nand(struct yaffs_dev *dev, int nand_chunk, + u8 * buffer, struct yaffs_ext_tags *tags); +int yaffs_wr_chunk_tags_nand(struct yaffs_dev *dev, + int nand_chunk, + const u8 * buffer, struct yaffs_ext_tags *tags); -int yaffs_ReadChunkWithTagsFromNAND(yaffs_Device *dev, int chunkInNAND, - __u8 *buffer, - yaffs_ExtendedTags *tags); +int yaffs_mark_bad(struct yaffs_dev *dev, int block_no); -int yaffs_WriteChunkWithTagsToNAND(yaffs_Device *dev, - int chunkInNAND, - const __u8 *buffer, - yaffs_ExtendedTags *tags); +int yaffs_query_init_block_state(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + unsigned *seq_number); -int yaffs_MarkBlockBad(yaffs_Device *dev, int blockNo); +int yaffs_erase_block(struct yaffs_dev *dev, int flash_block); -int yaffs_QueryInitialBlockState(yaffs_Device *dev, - int blockNo, - yaffs_BlockState *state, - unsigned *sequenceNumber); - -int yaffs_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND); - -int yaffs_InitialiseNAND(struct yaffs_DeviceStruct *dev); +int yaffs_init_nand(struct yaffs_dev *dev); #endif - diff --git a/fs/yaffs2/yaffs_nandemul2k.h b/fs/yaffs2/yaffs_nandemul2k.h deleted file mode 100644 index 2f4ce97b22b..00000000000 --- a/fs/yaffs2/yaffs_nandemul2k.h +++ /dev/null @@ -1,39 +0,0 @@ -/* - * YAFFS: Yet another Flash File System . A NAND-flash specific file system. - * - * Copyright (C) 2002-2010 Aleph One Ltd. - * for Toby Churchill Ltd and Brightstar Engineering - * - * Created by Charles Manning <charles@aleph1.co.uk> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU Lesser General Public License version 2.1 as - * published by the Free Software Foundation. - * - * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. - */ - -/* Interface to emulated NAND functions (2k page size) */ - -#ifndef __YAFFS_NANDEMUL2K_H__ -#define __YAFFS_NANDEMUL2K_H__ - -#include "yaffs_guts.h" - -int nandemul2k_WriteChunkWithTagsToNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 *data, - const yaffs_ExtendedTags *tags); -int nandemul2k_ReadChunkWithTagsFromNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, __u8 *data, - yaffs_ExtendedTags *tags); -int nandemul2k_MarkNANDBlockBad(struct yaffs_DeviceStruct *dev, int blockNo); -int nandemul2k_QueryNANDBlock(struct yaffs_DeviceStruct *dev, int blockNo, - yaffs_BlockState *state, __u32 *sequenceNumber); -int nandemul2k_EraseBlockInNAND(struct yaffs_DeviceStruct *dev, - int blockInNAND); -int nandemul2k_InitialiseNAND(struct yaffs_DeviceStruct *dev); -int nandemul2k_GetBytesPerChunk(void); -int nandemul2k_GetChunksPerBlock(void); -int nandemul2k_GetNumberOfBlocks(void); - -#endif diff --git a/fs/yaffs2/yaffs_packedtags1.c b/fs/yaffs2/yaffs_packedtags1.c index b2160c08b60..a77f0954fc1 100644 --- a/fs/yaffs2/yaffs_packedtags1.c +++ b/fs/yaffs2/yaffs_packedtags1.c @@ -14,37 +14,40 @@ #include "yaffs_packedtags1.h" #include "yportenv.h" -void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t) +void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, + const struct yaffs_ext_tags *t) { - pt->chunkId = t->chunkId; - pt->serialNumber = t->serialNumber; - pt->byteCount = t->byteCount; - pt->objectId = t->objectId; + pt->chunk_id = t->chunk_id; + pt->serial_number = t->serial_number; + pt->n_bytes = t->n_bytes; + pt->obj_id = t->obj_id; pt->ecc = 0; - pt->deleted = (t->chunkDeleted) ? 0 : 1; - pt->unusedStuff = 0; - pt->shouldBeFF = 0xFFFFFFFF; + pt->deleted = (t->is_deleted) ? 0 : 1; + pt->unused_stuff = 0; + pt->should_be_ff = 0xFFFFFFFF; } -void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt) +void yaffs_unpack_tags1(struct yaffs_ext_tags *t, + const struct yaffs_packed_tags1 *pt) { - static const __u8 allFF[] = + static const u8 all_ff[] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, -0xff }; + 0xff + }; - if (memcmp(allFF, pt, sizeof(yaffs_PackedTags1))) { - t->blockBad = 0; - if (pt->shouldBeFF != 0xFFFFFFFF) - t->blockBad = 1; - t->chunkUsed = 1; - t->objectId = pt->objectId; - t->chunkId = pt->chunkId; - t->byteCount = pt->byteCount; - t->eccResult = YAFFS_ECC_RESULT_NO_ERROR; - t->chunkDeleted = (pt->deleted) ? 0 : 1; - t->serialNumber = pt->serialNumber; + if (memcmp(all_ff, pt, sizeof(struct yaffs_packed_tags1))) { + t->block_bad = 0; + if (pt->should_be_ff != 0xFFFFFFFF) + t->block_bad = 1; + t->chunk_used = 1; + t->obj_id = pt->obj_id; + t->chunk_id = pt->chunk_id; + t->n_bytes = pt->n_bytes; + t->ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + t->is_deleted = (pt->deleted) ? 0 : 1; + t->serial_number = pt->serial_number; } else { - memset(t, 0, sizeof(yaffs_ExtendedTags)); + memset(t, 0, sizeof(struct yaffs_ext_tags)); } } diff --git a/fs/yaffs2/yaffs_packedtags1.h b/fs/yaffs2/yaffs_packedtags1.h index b9cf1a8bfbc..d6861ff505e 100644 --- a/fs/yaffs2/yaffs_packedtags1.h +++ b/fs/yaffs2/yaffs_packedtags1.h @@ -20,18 +20,20 @@ #include "yaffs_guts.h" -typedef struct { - unsigned chunkId:20; - unsigned serialNumber:2; - unsigned byteCount:10; - unsigned objectId:18; +struct yaffs_packed_tags1 { + unsigned chunk_id:20; + unsigned serial_number:2; + unsigned n_bytes:10; + unsigned obj_id:18; unsigned ecc:12; unsigned deleted:1; - unsigned unusedStuff:1; - unsigned shouldBeFF; + unsigned unused_stuff:1; + unsigned should_be_ff; -} yaffs_PackedTags1; +}; -void yaffs_PackTags1(yaffs_PackedTags1 *pt, const yaffs_ExtendedTags *t); -void yaffs_UnpackTags1(yaffs_ExtendedTags *t, const yaffs_PackedTags1 *pt); +void yaffs_pack_tags1(struct yaffs_packed_tags1 *pt, + const struct yaffs_ext_tags *t); +void yaffs_unpack_tags1(struct yaffs_ext_tags *t, + const struct yaffs_packed_tags1 *pt); #endif diff --git a/fs/yaffs2/yaffs_packedtags2.c b/fs/yaffs2/yaffs_packedtags2.c index f8ae94ccddb..8e7fea3d286 100644 --- a/fs/yaffs2/yaffs_packedtags2.c +++ b/fs/yaffs2/yaffs_packedtags2.c @@ -25,7 +25,7 @@ * This is defined by having the EXTRA_HEADER_INFO_FLAG set. */ -/* Extra flags applied to chunkId */ +/* Extra flags applied to chunk_id */ #define EXTRA_HEADER_INFO_FLAG 0x80000000 #define EXTRA_SHRINK_FLAG 0x40000000 @@ -38,161 +38,159 @@ #define EXTRA_OBJECT_TYPE_SHIFT (28) #define EXTRA_OBJECT_TYPE_MASK ((0x0F) << EXTRA_OBJECT_TYPE_SHIFT) - -static void yaffs_DumpPackedTags2TagsPart(const yaffs_PackedTags2TagsPart *ptt) +static void yaffs_dump_packed_tags2_tags_only(const struct + yaffs_packed_tags2_tags_only *ptt) { - T(YAFFS_TRACE_MTD, - (TSTR("packed tags obj %d chunk %d byte %d seq %d" TENDSTR), - ptt->objectId, ptt->chunkId, ptt->byteCount, - ptt->sequenceNumber)); + yaffs_trace(YAFFS_TRACE_MTD, + "packed tags obj %d chunk %d byte %d seq %d", + ptt->obj_id, ptt->chunk_id, ptt->n_bytes, ptt->seq_number); } -static void yaffs_DumpPackedTags2(const yaffs_PackedTags2 *pt) + +static void yaffs_dump_packed_tags2(const struct yaffs_packed_tags2 *pt) { - yaffs_DumpPackedTags2TagsPart(&pt->t); + yaffs_dump_packed_tags2_tags_only(&pt->t); } -static void yaffs_DumpTags2(const yaffs_ExtendedTags *t) +static void yaffs_dump_tags2(const struct yaffs_ext_tags *t) { - T(YAFFS_TRACE_MTD, - (TSTR - ("ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d" - TENDSTR), t->eccResult, t->blockBad, t->chunkUsed, t->objectId, - t->chunkId, t->byteCount, t->chunkDeleted, t->serialNumber, - t->sequenceNumber)); + yaffs_trace(YAFFS_TRACE_MTD, + "ext.tags eccres %d blkbad %d chused %d obj %d chunk%d byte %d del %d ser %d seq %d", + t->ecc_result, t->block_bad, t->chunk_used, t->obj_id, + t->chunk_id, t->n_bytes, t->is_deleted, t->serial_number, + t->seq_number); } -void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *ptt, - const yaffs_ExtendedTags *t) +void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *ptt, + const struct yaffs_ext_tags *t) { - ptt->chunkId = t->chunkId; - ptt->sequenceNumber = t->sequenceNumber; - ptt->byteCount = t->byteCount; - ptt->objectId = t->objectId; + ptt->chunk_id = t->chunk_id; + ptt->seq_number = t->seq_number; + ptt->n_bytes = t->n_bytes; + ptt->obj_id = t->obj_id; - if (t->chunkId == 0 && t->extraHeaderInfoAvailable) { + if (t->chunk_id == 0 && t->extra_available) { /* Store the extra header info instead */ - /* We save the parent object in the chunkId */ - ptt->chunkId = EXTRA_HEADER_INFO_FLAG - | t->extraParentObjectId; - if (t->extraIsShrinkHeader) - ptt->chunkId |= EXTRA_SHRINK_FLAG; - if (t->extraShadows) - ptt->chunkId |= EXTRA_SHADOWS_FLAG; - - ptt->objectId &= ~EXTRA_OBJECT_TYPE_MASK; - ptt->objectId |= - (t->extraObjectType << EXTRA_OBJECT_TYPE_SHIFT); - - if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) - ptt->byteCount = t->extraEquivalentObjectId; - else if (t->extraObjectType == YAFFS_OBJECT_TYPE_FILE) - ptt->byteCount = t->extraFileLength; + /* We save the parent object in the chunk_id */ + ptt->chunk_id = EXTRA_HEADER_INFO_FLAG | t->extra_parent_id; + if (t->extra_is_shrink) + ptt->chunk_id |= EXTRA_SHRINK_FLAG; + if (t->extra_shadows) + ptt->chunk_id |= EXTRA_SHADOWS_FLAG; + + ptt->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; + ptt->obj_id |= (t->extra_obj_type << EXTRA_OBJECT_TYPE_SHIFT); + + if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) + ptt->n_bytes = t->extra_equiv_id; + else if (t->extra_obj_type == YAFFS_OBJECT_TYPE_FILE) + ptt->n_bytes = t->extra_length; else - ptt->byteCount = 0; + ptt->n_bytes = 0; } - yaffs_DumpPackedTags2TagsPart(ptt); - yaffs_DumpTags2(t); + yaffs_dump_packed_tags2_tags_only(ptt); + yaffs_dump_tags2(t); } - -void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t, int tagsECC) +void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, + const struct yaffs_ext_tags *t, int tags_ecc) { - yaffs_PackTags2TagsPart(&pt->t, t); + yaffs_pack_tags2_tags_only(&pt->t, t); - if(tagsECC) - yaffs_ECCCalculateOther((unsigned char *)&pt->t, - sizeof(yaffs_PackedTags2TagsPart), - &pt->ecc); + if (tags_ecc) + yaffs_ecc_calc_other((unsigned char *)&pt->t, + sizeof(struct + yaffs_packed_tags2_tags_only), + &pt->ecc); } - -void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, - yaffs_PackedTags2TagsPart *ptt) +void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, + struct yaffs_packed_tags2_tags_only *ptt) { - memset(t, 0, sizeof(yaffs_ExtendedTags)); + memset(t, 0, sizeof(struct yaffs_ext_tags)); - yaffs_InitialiseTags(t); + yaffs_init_tags(t); - if (ptt->sequenceNumber != 0xFFFFFFFF) { - t->blockBad = 0; - t->chunkUsed = 1; - t->objectId = ptt->objectId; - t->chunkId = ptt->chunkId; - t->byteCount = ptt->byteCount; - t->chunkDeleted = 0; - t->serialNumber = 0; - t->sequenceNumber = ptt->sequenceNumber; + if (ptt->seq_number != 0xFFFFFFFF) { + t->block_bad = 0; + t->chunk_used = 1; + t->obj_id = ptt->obj_id; + t->chunk_id = ptt->chunk_id; + t->n_bytes = ptt->n_bytes; + t->is_deleted = 0; + t->serial_number = 0; + t->seq_number = ptt->seq_number; /* Do extra header info stuff */ - if (ptt->chunkId & EXTRA_HEADER_INFO_FLAG) { - t->chunkId = 0; - t->byteCount = 0; - - t->extraHeaderInfoAvailable = 1; - t->extraParentObjectId = - ptt->chunkId & (~(ALL_EXTRA_FLAGS)); - t->extraIsShrinkHeader = - (ptt->chunkId & EXTRA_SHRINK_FLAG) ? 1 : 0; - t->extraShadows = - (ptt->chunkId & EXTRA_SHADOWS_FLAG) ? 1 : 0; - t->extraObjectType = - ptt->objectId >> EXTRA_OBJECT_TYPE_SHIFT; - t->objectId &= ~EXTRA_OBJECT_TYPE_MASK; - - if (t->extraObjectType == YAFFS_OBJECT_TYPE_HARDLINK) - t->extraEquivalentObjectId = ptt->byteCount; + if (ptt->chunk_id & EXTRA_HEADER_INFO_FLAG) { + t->chunk_id = 0; + t->n_bytes = 0; + + t->extra_available = 1; + t->extra_parent_id = + ptt->chunk_id & (~(ALL_EXTRA_FLAGS)); + t->extra_is_shrink = + (ptt->chunk_id & EXTRA_SHRINK_FLAG) ? 1 : 0; + t->extra_shadows = + (ptt->chunk_id & EXTRA_SHADOWS_FLAG) ? 1 : 0; + t->extra_obj_type = + ptt->obj_id >> EXTRA_OBJECT_TYPE_SHIFT; + t->obj_id &= ~EXTRA_OBJECT_TYPE_MASK; + + if (t->extra_obj_type == YAFFS_OBJECT_TYPE_HARDLINK) + t->extra_equiv_id = ptt->n_bytes; else - t->extraFileLength = ptt->byteCount; + t->extra_length = ptt->n_bytes; } } - yaffs_DumpPackedTags2TagsPart(ptt); - yaffs_DumpTags2(t); + yaffs_dump_packed_tags2_tags_only(ptt); + yaffs_dump_tags2(t); } - -void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt, int tagsECC) +void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, + int tags_ecc) { - yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_NO_ERROR; + enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_NO_ERROR; - if (pt->t.sequenceNumber != 0xFFFFFFFF && - tagsECC){ + if (pt->t.seq_number != 0xFFFFFFFF && tags_ecc) { /* Chunk is in use and we need to do ECC */ - - yaffs_ECCOther ecc; + + struct yaffs_ecc_other ecc; int result; - yaffs_ECCCalculateOther((unsigned char *)&pt->t, - sizeof(yaffs_PackedTags2TagsPart), - &ecc); - result = yaffs_ECCCorrectOther((unsigned char *)&pt->t, - sizeof(yaffs_PackedTags2TagsPart), - &pt->ecc, &ecc); + yaffs_ecc_calc_other((unsigned char *)&pt->t, + sizeof(struct + yaffs_packed_tags2_tags_only), + &ecc); + result = + yaffs_ecc_correct_other((unsigned char *)&pt->t, + sizeof(struct + yaffs_packed_tags2_tags_only), + &pt->ecc, &ecc); switch (result) { - case 0: - eccResult = YAFFS_ECC_RESULT_NO_ERROR; - break; - case 1: - eccResult = YAFFS_ECC_RESULT_FIXED; - break; - case -1: - eccResult = YAFFS_ECC_RESULT_UNFIXED; - break; - default: - eccResult = YAFFS_ECC_RESULT_UNKNOWN; + case 0: + ecc_result = YAFFS_ECC_RESULT_NO_ERROR; + break; + case 1: + ecc_result = YAFFS_ECC_RESULT_FIXED; + break; + case -1: + ecc_result = YAFFS_ECC_RESULT_UNFIXED; + break; + default: + ecc_result = YAFFS_ECC_RESULT_UNKNOWN; } } - yaffs_UnpackTags2TagsPart(t, &pt->t); + yaffs_unpack_tags2_tags_only(t, &pt->t); - t->eccResult = eccResult; + t->ecc_result = ecc_result; - yaffs_DumpPackedTags2(pt); - yaffs_DumpTags2(t); + yaffs_dump_packed_tags2(pt); + yaffs_dump_tags2(t); } - diff --git a/fs/yaffs2/yaffs_packedtags2.h b/fs/yaffs2/yaffs_packedtags2.h index c132a98cdc2..f3296697bc0 100644 --- a/fs/yaffs2/yaffs_packedtags2.h +++ b/fs/yaffs2/yaffs_packedtags2.h @@ -21,23 +21,27 @@ #include "yaffs_guts.h" #include "yaffs_ecc.h" -typedef struct { - unsigned sequenceNumber; - unsigned objectId; - unsigned chunkId; - unsigned byteCount; -} yaffs_PackedTags2TagsPart; +struct yaffs_packed_tags2_tags_only { + unsigned seq_number; + unsigned obj_id; + unsigned chunk_id; + unsigned n_bytes; +}; -typedef struct { - yaffs_PackedTags2TagsPart t; - yaffs_ECCOther ecc; -} yaffs_PackedTags2; +struct yaffs_packed_tags2 { + struct yaffs_packed_tags2_tags_only t; + struct yaffs_ecc_other ecc; +}; /* Full packed tags with ECC, used for oob tags */ -void yaffs_PackTags2(yaffs_PackedTags2 *pt, const yaffs_ExtendedTags *t, int tagsECC); -void yaffs_UnpackTags2(yaffs_ExtendedTags *t, yaffs_PackedTags2 *pt, int tagsECC); +void yaffs_pack_tags2(struct yaffs_packed_tags2 *pt, + const struct yaffs_ext_tags *t, int tags_ecc); +void yaffs_unpack_tags2(struct yaffs_ext_tags *t, struct yaffs_packed_tags2 *pt, + int tags_ecc); /* Only the tags part (no ECC for use with inband tags */ -void yaffs_PackTags2TagsPart(yaffs_PackedTags2TagsPart *pt, const yaffs_ExtendedTags *t); -void yaffs_UnpackTags2TagsPart(yaffs_ExtendedTags *t, yaffs_PackedTags2TagsPart *pt); +void yaffs_pack_tags2_tags_only(struct yaffs_packed_tags2_tags_only *pt, + const struct yaffs_ext_tags *t); +void yaffs_unpack_tags2_tags_only(struct yaffs_ext_tags *t, + struct yaffs_packed_tags2_tags_only *pt); #endif diff --git a/fs/yaffs2/yaffs_qsort.c b/fs/yaffs2/yaffs_qsort.c deleted file mode 100644 index 187519fbdb5..00000000000 --- a/fs/yaffs2/yaffs_qsort.c +++ /dev/null @@ -1,163 +0,0 @@ -/* - * Copyright (c) 1992, 1993 - * The Regents of the University of California. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of the University nor the names of its contributors - * may be used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include "yportenv.h" -/* #include <linux/string.h> */ - -/* - * Qsort routine from Bentley & McIlroy's "Engineering a Sort Function". - */ -#define swapcode(TYPE, parmi, parmj, n) do { \ - long i = (n) / sizeof (TYPE); \ - register TYPE *pi = (TYPE *) (parmi); \ - register TYPE *pj = (TYPE *) (parmj); \ - do { \ - register TYPE t = *pi; \ - *pi++ = *pj; \ - *pj++ = t; \ - } while (--i > 0); \ -} while (0) - -#define SWAPINIT(a, es) swaptype = ((char *)a - (char *)0) % sizeof(long) || \ - es % sizeof(long) ? 2 : es == sizeof(long) ? 0 : 1; - -static __inline void -swapfunc(char *a, char *b, int n, int swaptype) -{ - if (swaptype <= 1) - swapcode(long, a, b, n); - else - swapcode(char, a, b, n); -} - -#define yswap(a, b) do { \ - if (swaptype == 0) { \ - long t = *(long *)(a); \ - *(long *)(a) = *(long *)(b); \ - *(long *)(b) = t; \ - } else \ - swapfunc(a, b, es, swaptype); \ -} while (0) - -#define vecswap(a, b, n) if ((n) > 0) swapfunc(a, b, n, swaptype) - -static __inline char * -med3(char *a, char *b, char *c, int (*cmp)(const void *, const void *)) -{ - return cmp(a, b) < 0 ? - (cmp(b, c) < 0 ? b : (cmp(a, c) < 0 ? c : a)) - : (cmp(b, c) > 0 ? b : (cmp(a, c) < 0 ? a : c)); -} - -#ifndef min -#define min(a, b) (((a) < (b)) ? (a) : (b)) -#endif - -void -yaffs_qsort(void *aa, size_t n, size_t es, - int (*cmp)(const void *, const void *)) -{ - char *pa, *pb, *pc, *pd, *pl, *pm, *pn; - int d, r, swaptype, swap_cnt; - register char *a = aa; - -loop: SWAPINIT(a, es); - swap_cnt = 0; - if (n < 7) { - for (pm = (char *)a + es; pm < (char *) a + n * es; pm += es) - for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; - pl -= es) - yswap(pl, pl - es); - return; - } - pm = (char *)a + (n / 2) * es; - if (n > 7) { - pl = (char *)a; - pn = (char *)a + (n - 1) * es; - if (n > 40) { - d = (n / 8) * es; - pl = med3(pl, pl + d, pl + 2 * d, cmp); - pm = med3(pm - d, pm, pm + d, cmp); - pn = med3(pn - 2 * d, pn - d, pn, cmp); - } - pm = med3(pl, pm, pn, cmp); - } - yswap(a, pm); - pa = pb = (char *)a + es; - - pc = pd = (char *)a + (n - 1) * es; - for (;;) { - while (pb <= pc && (r = cmp(pb, a)) <= 0) { - if (r == 0) { - swap_cnt = 1; - yswap(pa, pb); - pa += es; - } - pb += es; - } - while (pb <= pc && (r = cmp(pc, a)) >= 0) { - if (r == 0) { - swap_cnt = 1; - yswap(pc, pd); - pd -= es; - } - pc -= es; - } - if (pb > pc) - break; - yswap(pb, pc); - swap_cnt = 1; - pb += es; - pc -= es; - } - if (swap_cnt == 0) { /* Switch to insertion sort */ - for (pm = (char *) a + es; pm < (char *) a + n * es; pm += es) - for (pl = pm; pl > (char *) a && cmp(pl - es, pl) > 0; - pl -= es) - yswap(pl, pl - es); - return; - } - - pn = (char *)a + n * es; - r = min(pa - (char *)a, pb - pa); - vecswap(a, pb - r, r); - r = min((long)(pd - pc), (long)(pn - pd - es)); - vecswap(pb, pn - r, r); - r = pb - pa; - if (r > es) - yaffs_qsort(a, r / es, es, cmp); - r = pd - pc; - if (r > es) { - /* Iterate rather than recurse to save stack space */ - a = pn - r; - n = r / es; - goto loop; - } -/* yaffs_qsort(pn - r, r / es, es, cmp);*/ -} diff --git a/fs/yaffs2/yaffs_tagscompat.c b/fs/yaffs2/yaffs_tagscompat.c index e9ac51d7f94..7578075d9ac 100644 --- a/fs/yaffs2/yaffs_tagscompat.c +++ b/fs/yaffs2/yaffs_tagscompat.c @@ -17,56 +17,22 @@ #include "yaffs_getblockinfo.h" #include "yaffs_trace.h" -static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND); -#ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND); -static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, - const __u8 *data, - const yaffs_Spare *spare); -static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, - const yaffs_Spare *spare); -static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND); -#endif - -static const char yaffs_countBitsTable[256] = { - 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, - 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 -}; - -int yaffs_CountBits(__u8 x) -{ - int retVal; - retVal = yaffs_countBitsTable[x]; - return retVal; -} +static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk); + /********** Tags ECC calculations *********/ -void yaffs_CalcECC(const __u8 *data, yaffs_Spare *spare) +void yaffs_calc_ecc(const u8 * data, struct yaffs_spare *spare) { - yaffs_ECCCalculate(data, spare->ecc1); - yaffs_ECCCalculate(&data[256], spare->ecc2); + yaffs_ecc_cacl(data, spare->ecc1); + yaffs_ecc_cacl(&data[256], spare->ecc2); } -void yaffs_CalcTagsECC(yaffs_Tags *tags) +void yaffs_calc_tags_ecc(struct yaffs_tags *tags) { /* Calculate an ecc */ - unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; + unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; unsigned i, j; unsigned ecc = 0; unsigned bit = 0; @@ -85,24 +51,24 @@ void yaffs_CalcTagsECC(yaffs_Tags *tags) } -int yaffs_CheckECCOnTags(yaffs_Tags *tags) +int yaffs_check_tags_ecc(struct yaffs_tags *tags) { unsigned ecc = tags->ecc; - yaffs_CalcTagsECC(tags); + yaffs_calc_tags_ecc(tags); ecc ^= tags->ecc; if (ecc && ecc <= 64) { /* TODO: Handle the failure better. Retire? */ - unsigned char *b = ((yaffs_TagsUnion *) tags)->asBytes; + unsigned char *b = ((union yaffs_tags_union *)tags)->as_bytes; ecc--; b[ecc / 8] ^= (1 << (ecc & 7)); /* Now recvalc the ecc */ - yaffs_CalcTagsECC(tags); + yaffs_calc_tags_ecc(tags); return 1; /* recovered error */ } else if (ecc) { @@ -116,227 +82,198 @@ int yaffs_CheckECCOnTags(yaffs_Tags *tags) /********** Tags **********/ -static void yaffs_LoadTagsIntoSpare(yaffs_Spare *sparePtr, - yaffs_Tags *tagsPtr) +static void yaffs_load_tags_to_spare(struct yaffs_spare *spare_ptr, + struct yaffs_tags *tags_ptr) { - yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; - - yaffs_CalcTagsECC(tagsPtr); - - sparePtr->tagByte0 = tu->asBytes[0]; - sparePtr->tagByte1 = tu->asBytes[1]; - sparePtr->tagByte2 = tu->asBytes[2]; - sparePtr->tagByte3 = tu->asBytes[3]; - sparePtr->tagByte4 = tu->asBytes[4]; - sparePtr->tagByte5 = tu->asBytes[5]; - sparePtr->tagByte6 = tu->asBytes[6]; - sparePtr->tagByte7 = tu->asBytes[7]; + union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; + + yaffs_calc_tags_ecc(tags_ptr); + + spare_ptr->tb0 = tu->as_bytes[0]; + spare_ptr->tb1 = tu->as_bytes[1]; + spare_ptr->tb2 = tu->as_bytes[2]; + spare_ptr->tb3 = tu->as_bytes[3]; + spare_ptr->tb4 = tu->as_bytes[4]; + spare_ptr->tb5 = tu->as_bytes[5]; + spare_ptr->tb6 = tu->as_bytes[6]; + spare_ptr->tb7 = tu->as_bytes[7]; } -static void yaffs_GetTagsFromSpare(yaffs_Device *dev, yaffs_Spare *sparePtr, - yaffs_Tags *tagsPtr) +static void yaffs_get_tags_from_spare(struct yaffs_dev *dev, + struct yaffs_spare *spare_ptr, + struct yaffs_tags *tags_ptr) { - yaffs_TagsUnion *tu = (yaffs_TagsUnion *) tagsPtr; + union yaffs_tags_union *tu = (union yaffs_tags_union *)tags_ptr; int result; - tu->asBytes[0] = sparePtr->tagByte0; - tu->asBytes[1] = sparePtr->tagByte1; - tu->asBytes[2] = sparePtr->tagByte2; - tu->asBytes[3] = sparePtr->tagByte3; - tu->asBytes[4] = sparePtr->tagByte4; - tu->asBytes[5] = sparePtr->tagByte5; - tu->asBytes[6] = sparePtr->tagByte6; - tu->asBytes[7] = sparePtr->tagByte7; + tu->as_bytes[0] = spare_ptr->tb0; + tu->as_bytes[1] = spare_ptr->tb1; + tu->as_bytes[2] = spare_ptr->tb2; + tu->as_bytes[3] = spare_ptr->tb3; + tu->as_bytes[4] = spare_ptr->tb4; + tu->as_bytes[5] = spare_ptr->tb5; + tu->as_bytes[6] = spare_ptr->tb6; + tu->as_bytes[7] = spare_ptr->tb7; - result = yaffs_CheckECCOnTags(tagsPtr); + result = yaffs_check_tags_ecc(tags_ptr); if (result > 0) - dev->tagsEccFixed++; + dev->n_tags_ecc_fixed++; else if (result < 0) - dev->tagsEccUnfixed++; + dev->n_tags_ecc_unfixed++; } -static void yaffs_SpareInitialise(yaffs_Spare *spare) +static void yaffs_spare_init(struct yaffs_spare *spare) { - memset(spare, 0xFF, sizeof(yaffs_Spare)); + memset(spare, 0xFF, sizeof(struct yaffs_spare)); } -static int yaffs_WriteChunkToNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, const __u8 *data, - yaffs_Spare *spare) +static int yaffs_wr_nand(struct yaffs_dev *dev, + int nand_chunk, const u8 * data, + struct yaffs_spare *spare) { - if (chunkInNAND < dev->param.startBlock * dev->param.nChunksPerBlock) { - T(YAFFS_TRACE_ERROR, - (TSTR("**>> yaffs chunk %d is not valid" TENDSTR), - chunkInNAND)); + if (nand_chunk < dev->param.start_block * dev->param.chunks_per_block) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>> yaffs chunk %d is not valid", + nand_chunk); return YAFFS_FAIL; } - return dev->param.writeChunkToNAND(dev, chunkInNAND, data, spare); + return dev->param.write_chunk_fn(dev, nand_chunk, data, spare); } -static int yaffs_ReadChunkFromNAND(struct yaffs_DeviceStruct *dev, - int chunkInNAND, - __u8 *data, - yaffs_Spare *spare, - yaffs_ECCResult *eccResult, - int doErrorCorrection) +static int yaffs_rd_chunk_nand(struct yaffs_dev *dev, + int nand_chunk, + u8 * data, + struct yaffs_spare *spare, + enum yaffs_ecc_result *ecc_result, + int correct_errors) { - int retVal; - yaffs_Spare localSpare; + int ret_val; + struct yaffs_spare local_spare; if (!spare && data) { /* If we don't have a real spare, then we use a local one. */ /* Need this for the calculation of the ecc */ - spare = &localSpare; + spare = &local_spare; } - if (!dev->param.useNANDECC) { - retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data, spare); - if (data && doErrorCorrection) { + if (!dev->param.use_nand_ecc) { + ret_val = + dev->param.read_chunk_fn(dev, nand_chunk, data, spare); + if (data && correct_errors) { /* Do ECC correction */ /* Todo handle any errors */ - int eccResult1, eccResult2; - __u8 calcEcc[3]; - - yaffs_ECCCalculate(data, calcEcc); - eccResult1 = - yaffs_ECCCorrect(data, spare->ecc1, calcEcc); - yaffs_ECCCalculate(&data[256], calcEcc); - eccResult2 = - yaffs_ECCCorrect(&data[256], spare->ecc2, calcEcc); - - if (eccResult1 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error fix performed on chunk %d:0" - TENDSTR), chunkInNAND)); - dev->eccFixed++; - } else if (eccResult1 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error unfixed on chunk %d:0" - TENDSTR), chunkInNAND)); - dev->eccUnfixed++; + int ecc_result1, ecc_result2; + u8 calc_ecc[3]; + + yaffs_ecc_cacl(data, calc_ecc); + ecc_result1 = + yaffs_ecc_correct(data, spare->ecc1, calc_ecc); + yaffs_ecc_cacl(&data[256], calc_ecc); + ecc_result2 = + yaffs_ecc_correct(&data[256], spare->ecc2, + calc_ecc); + + if (ecc_result1 > 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error fix performed on chunk %d:0", + nand_chunk); + dev->n_ecc_fixed++; + } else if (ecc_result1 < 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error unfixed on chunk %d:0", + nand_chunk); + dev->n_ecc_unfixed++; } - if (eccResult2 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error fix performed on chunk %d:1" - TENDSTR), chunkInNAND)); - dev->eccFixed++; - } else if (eccResult2 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>yaffs ecc error unfixed on chunk %d:1" - TENDSTR), chunkInNAND)); - dev->eccUnfixed++; + if (ecc_result2 > 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error fix performed on chunk %d:1", + nand_chunk); + dev->n_ecc_fixed++; + } else if (ecc_result2 < 0) { + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>yaffs ecc error unfixed on chunk %d:1", + nand_chunk); + dev->n_ecc_unfixed++; } - if (eccResult1 || eccResult2) { + if (ecc_result1 || ecc_result2) { /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); + yaffs_handle_rd_data_error(dev, nand_chunk); } - if (eccResult1 < 0 || eccResult2 < 0) - *eccResult = YAFFS_ECC_RESULT_UNFIXED; - else if (eccResult1 > 0 || eccResult2 > 0) - *eccResult = YAFFS_ECC_RESULT_FIXED; + if (ecc_result1 < 0 || ecc_result2 < 0) + *ecc_result = YAFFS_ECC_RESULT_UNFIXED; + else if (ecc_result1 > 0 || ecc_result2 > 0) + *ecc_result = YAFFS_ECC_RESULT_FIXED; else - *eccResult = YAFFS_ECC_RESULT_NO_ERROR; + *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; } } else { /* Must allocate enough memory for spare+2*sizeof(int) */ /* for ecc results from device. */ - struct yaffs_NANDSpare nspare; + struct yaffs_nand_spare nspare; memset(&nspare, 0, sizeof(nspare)); - retVal = dev->param.readChunkFromNAND(dev, chunkInNAND, data, - (yaffs_Spare *) &nspare); - memcpy(spare, &nspare, sizeof(yaffs_Spare)); - if (data && doErrorCorrection) { + ret_val = dev->param.read_chunk_fn(dev, nand_chunk, data, + (struct yaffs_spare *) + &nspare); + memcpy(spare, &nspare, sizeof(struct yaffs_spare)); + if (data && correct_errors) { if (nspare.eccres1 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error fix performed on chunk %d:0" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error fix performed on chunk %d:0", + nand_chunk); } else if (nspare.eccres1 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error unfixed on chunk %d:0" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error unfixed on chunk %d:0", + nand_chunk); } if (nspare.eccres2 > 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error fix performed on chunk %d:1" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error fix performed on chunk %d:1", + nand_chunk); } else if (nspare.eccres2 < 0) { - T(YAFFS_TRACE_ERROR, - (TSTR - ("**>>mtd ecc error unfixed on chunk %d:1" - TENDSTR), chunkInNAND)); + yaffs_trace(YAFFS_TRACE_ERROR, + "**>>mtd ecc error unfixed on chunk %d:1", + nand_chunk); } if (nspare.eccres1 || nspare.eccres2) { /* We had a data problem on this page */ - yaffs_HandleReadDataError(dev, chunkInNAND); + yaffs_handle_rd_data_error(dev, nand_chunk); } if (nspare.eccres1 < 0 || nspare.eccres2 < 0) - *eccResult = YAFFS_ECC_RESULT_UNFIXED; + *ecc_result = YAFFS_ECC_RESULT_UNFIXED; else if (nspare.eccres1 > 0 || nspare.eccres2 > 0) - *eccResult = YAFFS_ECC_RESULT_FIXED; + *ecc_result = YAFFS_ECC_RESULT_FIXED; else - *eccResult = YAFFS_ECC_RESULT_NO_ERROR; + *ecc_result = YAFFS_ECC_RESULT_NO_ERROR; } } - return retVal; -} - -#ifdef NOTYET -static int yaffs_CheckChunkErased(struct yaffs_DeviceStruct *dev, - int chunkInNAND) -{ - static int init; - static __u8 cmpbuf[YAFFS_BYTES_PER_CHUNK]; - static __u8 data[YAFFS_BYTES_PER_CHUNK]; - /* Might as well always allocate the larger size for */ - /* dev->param.useNANDECC == true; */ - static __u8 spare[sizeof(struct yaffs_NANDSpare)]; - - dev->param.readChunkFromNAND(dev, chunkInNAND, data, (yaffs_Spare *) spare); - - if (!init) { - memset(cmpbuf, 0xff, YAFFS_BYTES_PER_CHUNK); - init = 1; - } - - if (memcmp(cmpbuf, data, YAFFS_BYTES_PER_CHUNK)) - return YAFFS_FAIL; - if (memcmp(cmpbuf, spare, 16)) - return YAFFS_FAIL; - - return YAFFS_OK; - + return ret_val; } -#endif /* * Functions for robustisizing */ -static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND) +static void yaffs_handle_rd_data_error(struct yaffs_dev *dev, int nand_chunk) { - int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock; + int flash_block = nand_chunk / dev->param.chunks_per_block; /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND + dev->blockOffset)->needsRetiring = 1; - T(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, - (TSTR("**>>Block %d marked for retirement" TENDSTR), blockInNAND)); + yaffs_get_block_info(dev, + flash_block + dev->block_offset)->needs_retiring = + 1; + yaffs_trace(YAFFS_TRACE_ERROR | YAFFS_TRACE_BAD_BLOCKS, + "**>>Block %d marked for retirement", + flash_block); /* TODO: * Just do a garbage collection on the affected block @@ -345,138 +282,85 @@ static void yaffs_HandleReadDataError(yaffs_Device *dev, int chunkInNAND) */ } -#ifdef NOTYET -static void yaffs_CheckWrittenBlock(yaffs_Device *dev, int chunkInNAND) +int yaffs_tags_compat_wr(struct yaffs_dev *dev, + int nand_chunk, + const u8 * data, const struct yaffs_ext_tags *ext_tags) { -} + struct yaffs_spare spare; + struct yaffs_tags tags; -static void yaffs_HandleWriteChunkOk(yaffs_Device *dev, int chunkInNAND, - const __u8 *data, - const yaffs_Spare *spare) -{ -} - -static void yaffs_HandleUpdateChunk(yaffs_Device *dev, int chunkInNAND, - const yaffs_Spare *spare) -{ -} - -static void yaffs_HandleWriteChunkError(yaffs_Device *dev, int chunkInNAND) -{ - int blockInNAND = chunkInNAND / dev->param.nChunksPerBlock; + yaffs_spare_init(&spare); - /* Mark the block for retirement */ - yaffs_GetBlockInfo(dev, blockInNAND)->needsRetiring = 1; - /* Delete the chunk */ - yaffs_DeleteChunk(dev, chunkInNAND, 1, __LINE__); -} - -static int yaffs_VerifyCompare(const __u8 *d0, const __u8 *d1, - const yaffs_Spare *s0, const yaffs_Spare *s1) -{ - - if (memcmp(d0, d1, YAFFS_BYTES_PER_CHUNK) != 0 || - s0->tagByte0 != s1->tagByte0 || - s0->tagByte1 != s1->tagByte1 || - s0->tagByte2 != s1->tagByte2 || - s0->tagByte3 != s1->tagByte3 || - s0->tagByte4 != s1->tagByte4 || - s0->tagByte5 != s1->tagByte5 || - s0->tagByte6 != s1->tagByte6 || - s0->tagByte7 != s1->tagByte7 || - s0->ecc1[0] != s1->ecc1[0] || - s0->ecc1[1] != s1->ecc1[1] || - s0->ecc1[2] != s1->ecc1[2] || - s0->ecc2[0] != s1->ecc2[0] || - s0->ecc2[1] != s1->ecc2[1] || s0->ecc2[2] != s1->ecc2[2]) { - return 0; - } - - return 1; -} -#endif /* NOTYET */ - -int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev, - int chunkInNAND, - const __u8 *data, - const yaffs_ExtendedTags *eTags) -{ - yaffs_Spare spare; - yaffs_Tags tags; - - yaffs_SpareInitialise(&spare); - - if (eTags->chunkDeleted) - spare.pageStatus = 0; + if (ext_tags->is_deleted) + spare.page_status = 0; else { - tags.objectId = eTags->objectId; - tags.chunkId = eTags->chunkId; + tags.obj_id = ext_tags->obj_id; + tags.chunk_id = ext_tags->chunk_id; - tags.byteCountLSB = eTags->byteCount & 0x3ff; + tags.n_bytes_lsb = ext_tags->n_bytes & 0x3ff; - if (dev->nDataBytesPerChunk >= 1024) - tags.byteCountMSB = (eTags->byteCount >> 10) & 3; + if (dev->data_bytes_per_chunk >= 1024) + tags.n_bytes_msb = (ext_tags->n_bytes >> 10) & 3; else - tags.byteCountMSB = 3; - + tags.n_bytes_msb = 3; - tags.serialNumber = eTags->serialNumber; + tags.serial_number = ext_tags->serial_number; - if (!dev->param.useNANDECC && data) - yaffs_CalcECC(data, &spare); + if (!dev->param.use_nand_ecc && data) + yaffs_calc_ecc(data, &spare); - yaffs_LoadTagsIntoSpare(&spare, &tags); + yaffs_load_tags_to_spare(&spare, &tags); } - return yaffs_WriteChunkToNAND(dev, chunkInNAND, data, &spare); + return yaffs_wr_nand(dev, nand_chunk, data, &spare); } -int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev, - int chunkInNAND, - __u8 *data, - yaffs_ExtendedTags *eTags) +int yaffs_tags_compat_rd(struct yaffs_dev *dev, + int nand_chunk, + u8 * data, struct yaffs_ext_tags *ext_tags) { - yaffs_Spare spare; - yaffs_Tags tags; - yaffs_ECCResult eccResult = YAFFS_ECC_RESULT_UNKNOWN; + struct yaffs_spare spare; + struct yaffs_tags tags; + enum yaffs_ecc_result ecc_result = YAFFS_ECC_RESULT_UNKNOWN; - static yaffs_Spare spareFF; + static struct yaffs_spare spare_ff; static int init; if (!init) { - memset(&spareFF, 0xFF, sizeof(spareFF)); + memset(&spare_ff, 0xFF, sizeof(spare_ff)); init = 1; } - if (yaffs_ReadChunkFromNAND - (dev, chunkInNAND, data, &spare, &eccResult, 1)) { - /* eTags may be NULL */ - if (eTags) { + if (yaffs_rd_chunk_nand(dev, nand_chunk, data, &spare, &ecc_result, 1)) { + /* ext_tags may be NULL */ + if (ext_tags) { int deleted = - (yaffs_CountBits(spare.pageStatus) < 7) ? 1 : 0; + (hweight8(spare.page_status) < 7) ? 1 : 0; - eTags->chunkDeleted = deleted; - eTags->eccResult = eccResult; - eTags->blockBad = 0; /* We're reading it */ + ext_tags->is_deleted = deleted; + ext_tags->ecc_result = ecc_result; + ext_tags->block_bad = 0; /* We're reading it */ /* therefore it is not a bad block */ - eTags->chunkUsed = - (memcmp(&spareFF, &spare, sizeof(spareFF)) != + ext_tags->chunk_used = + (memcmp(&spare_ff, &spare, sizeof(spare_ff)) != 0) ? 1 : 0; - if (eTags->chunkUsed) { - yaffs_GetTagsFromSpare(dev, &spare, &tags); + if (ext_tags->chunk_used) { + yaffs_get_tags_from_spare(dev, &spare, &tags); - eTags->objectId = tags.objectId; - eTags->chunkId = tags.chunkId; - eTags->byteCount = tags.byteCountLSB; + ext_tags->obj_id = tags.obj_id; + ext_tags->chunk_id = tags.chunk_id; + ext_tags->n_bytes = tags.n_bytes_lsb; - if (dev->nDataBytesPerChunk >= 1024) - eTags->byteCount |= (((unsigned) tags.byteCountMSB) << 10); + if (dev->data_bytes_per_chunk >= 1024) + ext_tags->n_bytes |= + (((unsigned)tags. + n_bytes_msb) << 10); - eTags->serialNumber = tags.serialNumber; + ext_tags->serial_number = tags.serial_number; } } @@ -486,51 +370,50 @@ int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev, } } -int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, - int blockInNAND) +int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int flash_block) { - yaffs_Spare spare; + struct yaffs_spare spare; - memset(&spare, 0xff, sizeof(yaffs_Spare)); + memset(&spare, 0xff, sizeof(struct yaffs_spare)); - spare.blockStatus = 'Y'; + spare.block_status = 'Y'; - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock, NULL, - &spare); - yaffs_WriteChunkToNAND(dev, blockInNAND * dev->param.nChunksPerBlock + 1, - NULL, &spare); + yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block, NULL, + &spare); + yaffs_wr_nand(dev, flash_block * dev->param.chunks_per_block + 1, + NULL, &spare); return YAFFS_OK; } -int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, - int blockNo, - yaffs_BlockState *state, - __u32 *sequenceNumber) +int yaffs_tags_compat_query_block(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + u32 * seq_number) { - yaffs_Spare spare0, spare1; - static yaffs_Spare spareFF; + struct yaffs_spare spare0, spare1; + static struct yaffs_spare spare_ff; static int init; - yaffs_ECCResult dummy; + enum yaffs_ecc_result dummy; if (!init) { - memset(&spareFF, 0xFF, sizeof(spareFF)); + memset(&spare_ff, 0xFF, sizeof(spare_ff)); init = 1; } - *sequenceNumber = 0; + *seq_number = 0; - yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock, NULL, - &spare0, &dummy, 1); - yaffs_ReadChunkFromNAND(dev, blockNo * dev->param.nChunksPerBlock + 1, NULL, - &spare1, &dummy, 1); + yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block, NULL, + &spare0, &dummy, 1); + yaffs_rd_chunk_nand(dev, block_no * dev->param.chunks_per_block + 1, + NULL, &spare1, &dummy, 1); - if (yaffs_CountBits(spare0.blockStatus & spare1.blockStatus) < 7) + if (hweight8(spare0.block_status & spare1.block_status) < 7) *state = YAFFS_BLOCK_STATE_DEAD; - else if (memcmp(&spareFF, &spare0, sizeof(spareFF)) == 0) + else if (memcmp(&spare_ff, &spare0, sizeof(spare_ff)) == 0) *state = YAFFS_BLOCK_STATE_EMPTY; else *state = YAFFS_BLOCK_STATE_NEEDS_SCANNING; diff --git a/fs/yaffs2/yaffs_tagscompat.h b/fs/yaffs2/yaffs_tagscompat.h index 8c663db526c..8cd35dcd3ca 100644 --- a/fs/yaffs2/yaffs_tagscompat.h +++ b/fs/yaffs2/yaffs_tagscompat.h @@ -17,23 +17,20 @@ #define __YAFFS_TAGSCOMPAT_H__ #include "yaffs_guts.h" -int yaffs_TagsCompatabilityWriteChunkWithTagsToNAND(yaffs_Device *dev, - int chunkInNAND, - const __u8 *data, - const yaffs_ExtendedTags *tags); -int yaffs_TagsCompatabilityReadChunkWithTagsFromNAND(yaffs_Device *dev, - int chunkInNAND, - __u8 *data, - yaffs_ExtendedTags *tags); -int yaffs_TagsCompatabilityMarkNANDBlockBad(struct yaffs_DeviceStruct *dev, - int blockNo); -int yaffs_TagsCompatabilityQueryNANDBlock(struct yaffs_DeviceStruct *dev, - int blockNo, - yaffs_BlockState *state, - __u32 *sequenceNumber); +int yaffs_tags_compat_wr(struct yaffs_dev *dev, + int nand_chunk, + const u8 * data, const struct yaffs_ext_tags *tags); +int yaffs_tags_compat_rd(struct yaffs_dev *dev, + int nand_chunk, + u8 * data, struct yaffs_ext_tags *tags); +int yaffs_tags_compat_mark_bad(struct yaffs_dev *dev, int block_no); +int yaffs_tags_compat_query_block(struct yaffs_dev *dev, + int block_no, + enum yaffs_block_state *state, + u32 * seq_number); -void yaffs_CalcTagsECC(yaffs_Tags *tags); -int yaffs_CheckECCOnTags(yaffs_Tags *tags); -int yaffs_CountBits(__u8 byte); +void yaffs_calc_tags_ecc(struct yaffs_tags *tags); +int yaffs_check_tags_ecc(struct yaffs_tags *tags); +int yaffs_count_bits(u8 byte); #endif diff --git a/fs/yaffs2/yaffs_tagsvalidity.c b/fs/yaffs2/yaffs_tagsvalidity.c index 93ad08c1f5d..4358d79d4be 100644 --- a/fs/yaffs2/yaffs_tagsvalidity.c +++ b/fs/yaffs2/yaffs_tagsvalidity.c @@ -13,16 +13,15 @@ #include "yaffs_tagsvalidity.h" -void yaffs_InitialiseTags(yaffs_ExtendedTags *tags) +void yaffs_init_tags(struct yaffs_ext_tags *tags) { - memset(tags, 0, sizeof(yaffs_ExtendedTags)); - tags->validMarker0 = 0xAAAAAAAA; - tags->validMarker1 = 0x55555555; + memset(tags, 0, sizeof(struct yaffs_ext_tags)); + tags->validity0 = 0xAAAAAAAA; + tags->validity1 = 0x55555555; } -int yaffs_ValidateTags(yaffs_ExtendedTags *tags) +int yaffs_validate_tags(struct yaffs_ext_tags *tags) { - return (tags->validMarker0 == 0xAAAAAAAA && - tags->validMarker1 == 0x55555555); + return (tags->validity0 == 0xAAAAAAAA && tags->validity1 == 0x55555555); } diff --git a/fs/yaffs2/yaffs_tagsvalidity.h b/fs/yaffs2/yaffs_tagsvalidity.h index 60a1aea6c5c..36a021fc8fa 100644 --- a/fs/yaffs2/yaffs_tagsvalidity.h +++ b/fs/yaffs2/yaffs_tagsvalidity.h @@ -13,12 +13,11 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ - #ifndef __YAFFS_TAGS_VALIDITY_H__ #define __YAFFS_TAGS_VALIDITY_H__ #include "yaffs_guts.h" -void yaffs_InitialiseTags(yaffs_ExtendedTags *tags); -int yaffs_ValidateTags(yaffs_ExtendedTags *tags); +void yaffs_init_tags(struct yaffs_ext_tags *tags); +int yaffs_validate_tags(struct yaffs_ext_tags *tags); #endif diff --git a/fs/yaffs2/yaffs_trace.h b/fs/yaffs2/yaffs_trace.h index 8b848edba05..6273dbf9f63 100644 --- a/fs/yaffs2/yaffs_trace.h +++ b/fs/yaffs2/yaffs_trace.h @@ -13,11 +13,10 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ - #ifndef __YTRACE_H__ #define __YTRACE_H__ -extern unsigned int yaffs_traceMask; +extern unsigned int yaffs_trace_mask; extern unsigned int yaffs_wr_attempts; /* @@ -49,12 +48,10 @@ extern unsigned int yaffs_wr_attempts; #define YAFFS_TRACE_SYNC 0x00100000 #define YAFFS_TRACE_BACKGROUND 0x00200000 #define YAFFS_TRACE_LOCK 0x00400000 +#define YAFFS_TRACE_MOUNT 0x00800000 #define YAFFS_TRACE_ERROR 0x40000000 #define YAFFS_TRACE_BUG 0x80000000 #define YAFFS_TRACE_ALWAYS 0xF0000000 - -#define T(mask, p) do { if ((mask) & (yaffs_traceMask | YAFFS_TRACE_ALWAYS)) TOUT(p); } while (0) - #endif diff --git a/fs/yaffs2/yaffs_verify.c b/fs/yaffs2/yaffs_verify.c new file mode 100644 index 00000000000..738c7f69a5e --- /dev/null +++ b/fs/yaffs2/yaffs_verify.c @@ -0,0 +1,535 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_verify.h" +#include "yaffs_trace.h" +#include "yaffs_bitmap.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_nand.h" + +int yaffs_skip_verification(struct yaffs_dev *dev) +{ + dev = dev; + return !(yaffs_trace_mask & + (YAFFS_TRACE_VERIFY | YAFFS_TRACE_VERIFY_FULL)); +} + +static int yaffs_skip_full_verification(struct yaffs_dev *dev) +{ + dev = dev; + return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_FULL)); +} + +static int yaffs_skip_nand_verification(struct yaffs_dev *dev) +{ + dev = dev; + return !(yaffs_trace_mask & (YAFFS_TRACE_VERIFY_NAND)); +} + +static const char *block_state_name[] = { + "Unknown", + "Needs scanning", + "Scanning", + "Empty", + "Allocating", + "Full", + "Dirty", + "Checkpoint", + "Collecting", + "Dead" +}; + +void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, int n) +{ + int actually_used; + int in_use; + + if (yaffs_skip_verification(dev)) + return; + + /* Report illegal runtime states */ + if (bi->block_state >= YAFFS_NUMBER_OF_BLOCK_STATES) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has undefined state %d", + n, bi->block_state); + + switch (bi->block_state) { + case YAFFS_BLOCK_STATE_UNKNOWN: + case YAFFS_BLOCK_STATE_SCANNING: + case YAFFS_BLOCK_STATE_NEEDS_SCANNING: + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has bad run-state %s", + n, block_state_name[bi->block_state]); + } + + /* Check pages in use and soft deletions are legal */ + + actually_used = bi->pages_in_use - bi->soft_del_pages; + + if (bi->pages_in_use < 0 + || bi->pages_in_use > dev->param.chunks_per_block + || bi->soft_del_pages < 0 + || bi->soft_del_pages > dev->param.chunks_per_block + || actually_used < 0 || actually_used > dev->param.chunks_per_block) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has illegal values pages_in_used %d soft_del_pages %d", + n, bi->pages_in_use, bi->soft_del_pages); + + /* Check chunk bitmap legal */ + in_use = yaffs_count_chunk_bits(dev, n); + if (in_use != bi->pages_in_use) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Block %d has inconsistent values pages_in_use %d counted chunk bits %d", + n, bi->pages_in_use, in_use); + +} + +void yaffs_verify_collected_blk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, int n) +{ + yaffs_verify_blk(dev, bi, n); + + /* After collection the block should be in the erased state */ + + if (bi->block_state != YAFFS_BLOCK_STATE_COLLECTING && + bi->block_state != YAFFS_BLOCK_STATE_EMPTY) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Block %d is in state %d after gc, should be erased", + n, bi->block_state); + } +} + +void yaffs_verify_blocks(struct yaffs_dev *dev) +{ + int i; + int state_count[YAFFS_NUMBER_OF_BLOCK_STATES]; + int illegal_states = 0; + + if (yaffs_skip_verification(dev)) + return; + + memset(state_count, 0, sizeof(state_count)); + + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + struct yaffs_block_info *bi = yaffs_get_block_info(dev, i); + yaffs_verify_blk(dev, bi, i); + + if (bi->block_state < YAFFS_NUMBER_OF_BLOCK_STATES) + state_count[bi->block_state]++; + else + illegal_states++; + } + + yaffs_trace(YAFFS_TRACE_VERIFY, "Block summary"); + + yaffs_trace(YAFFS_TRACE_VERIFY, + "%d blocks have illegal states", + illegal_states); + if (state_count[YAFFS_BLOCK_STATE_ALLOCATING] > 1) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Too many allocating blocks"); + + for (i = 0; i < YAFFS_NUMBER_OF_BLOCK_STATES; i++) + yaffs_trace(YAFFS_TRACE_VERIFY, + "%s %d blocks", + block_state_name[i], state_count[i]); + + if (dev->blocks_in_checkpt != state_count[YAFFS_BLOCK_STATE_CHECKPOINT]) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Checkpoint block count wrong dev %d count %d", + dev->blocks_in_checkpt, + state_count[YAFFS_BLOCK_STATE_CHECKPOINT]); + + if (dev->n_erased_blocks != state_count[YAFFS_BLOCK_STATE_EMPTY]) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Erased block count wrong dev %d count %d", + dev->n_erased_blocks, + state_count[YAFFS_BLOCK_STATE_EMPTY]); + + if (state_count[YAFFS_BLOCK_STATE_COLLECTING] > 1) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Too many collecting blocks %d (max is 1)", + state_count[YAFFS_BLOCK_STATE_COLLECTING]); +} + +/* + * Verify the object header. oh must be valid, but obj and tags may be NULL in which + * case those tests will not be performed. + */ +void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, + struct yaffs_ext_tags *tags, int parent_check) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; + + if (!(tags && obj && oh)) { + yaffs_trace(YAFFS_TRACE_VERIFY, + "Verifying object header tags %p obj %p oh %p", + tags, obj, oh); + return; + } + + if (oh->type <= YAFFS_OBJECT_TYPE_UNKNOWN || + oh->type > YAFFS_OBJECT_TYPE_MAX) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header type is illegal value 0x%x", + tags->obj_id, oh->type); + + if (tags->obj_id != obj->obj_id) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header mismatch obj_id %d", + tags->obj_id, obj->obj_id); + + /* + * Check that the object's parent ids match if parent_check requested. + * + * Tests do not apply to the root object. + */ + + if (parent_check && tags->obj_id > 1 && !obj->parent) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header mismatch parent_id %d obj->parent is NULL", + tags->obj_id, oh->parent_obj_id); + + if (parent_check && obj->parent && + oh->parent_obj_id != obj->parent->obj_id && + (oh->parent_obj_id != YAFFS_OBJECTID_UNLINKED || + obj->parent->obj_id != YAFFS_OBJECTID_DELETED)) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header mismatch parent_id %d parent_obj_id %d", + tags->obj_id, oh->parent_obj_id, + obj->parent->obj_id); + + if (tags->obj_id > 1 && oh->name[0] == 0) /* Null name */ + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header name is NULL", + obj->obj_id); + + if (tags->obj_id > 1 && ((u8) (oh->name[0])) == 0xff) /* Trashed name */ + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d header name is 0xFF", + obj->obj_id); +} + +void yaffs_verify_file(struct yaffs_obj *obj) +{ + int required_depth; + int actual_depth; + u32 last_chunk; + u32 x; + u32 i; + struct yaffs_dev *dev; + struct yaffs_ext_tags tags; + struct yaffs_tnode *tn; + u32 obj_id; + + if (!obj) + return; + + if (yaffs_skip_verification(obj->my_dev)) + return; + + dev = obj->my_dev; + obj_id = obj->obj_id; + + /* Check file size is consistent with tnode depth */ + last_chunk = + obj->variant.file_variant.file_size / dev->data_bytes_per_chunk + 1; + x = last_chunk >> YAFFS_TNODES_LEVEL0_BITS; + required_depth = 0; + while (x > 0) { + x >>= YAFFS_TNODES_INTERNAL_BITS; + required_depth++; + } + + actual_depth = obj->variant.file_variant.top_level; + + /* Check that the chunks in the tnode tree are all correct. + * We do this by scanning through the tnode tree and + * checking the tags for every chunk match. + */ + + if (yaffs_skip_nand_verification(dev)) + return; + + for (i = 1; i <= last_chunk; i++) { + tn = yaffs_find_tnode_0(dev, &obj->variant.file_variant, i); + + if (tn) { + u32 the_chunk = yaffs_get_group_base(dev, tn, i); + if (the_chunk > 0) { + yaffs_rd_chunk_tags_nand(dev, the_chunk, NULL, + &tags); + if (tags.obj_id != obj_id || tags.chunk_id != i) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Object %d chunk_id %d NAND mismatch chunk %d tags (%d:%d)", + obj_id, i, the_chunk, + tags.obj_id, tags.chunk_id); + } + } + } +} + +void yaffs_verify_link(struct yaffs_obj *obj) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; + + /* Verify sane equivalent object */ +} + +void yaffs_verify_symlink(struct yaffs_obj *obj) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; + + /* Verify symlink string */ +} + +void yaffs_verify_special(struct yaffs_obj *obj) +{ + if (obj && yaffs_skip_verification(obj->my_dev)) + return; +} + +void yaffs_verify_obj(struct yaffs_obj *obj) +{ + struct yaffs_dev *dev; + + u32 chunk_min; + u32 chunk_max; + + u32 chunk_id_ok; + u32 chunk_in_range; + u32 chunk_wrongly_deleted; + u32 chunk_valid; + + if (!obj) + return; + + if (obj->being_created) + return; + + dev = obj->my_dev; + + if (yaffs_skip_verification(dev)) + return; + + /* Check sane object header chunk */ + + chunk_min = dev->internal_start_block * dev->param.chunks_per_block; + chunk_max = + (dev->internal_end_block + 1) * dev->param.chunks_per_block - 1; + + chunk_in_range = (((unsigned)(obj->hdr_chunk)) >= chunk_min && + ((unsigned)(obj->hdr_chunk)) <= chunk_max); + chunk_id_ok = chunk_in_range || (obj->hdr_chunk == 0); + chunk_valid = chunk_in_range && + yaffs_check_chunk_bit(dev, + obj->hdr_chunk / dev->param.chunks_per_block, + obj->hdr_chunk % dev->param.chunks_per_block); + chunk_wrongly_deleted = chunk_in_range && !chunk_valid; + + if (!obj->fake && (!chunk_id_ok || chunk_wrongly_deleted)) + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d has chunk_id %d %s %s", + obj->obj_id, obj->hdr_chunk, + chunk_id_ok ? "" : ",out of range", + chunk_wrongly_deleted ? ",marked as deleted" : ""); + + if (chunk_valid && !yaffs_skip_nand_verification(dev)) { + struct yaffs_ext_tags tags; + struct yaffs_obj_hdr *oh; + u8 *buffer = yaffs_get_temp_buffer(dev, __LINE__); + + oh = (struct yaffs_obj_hdr *)buffer; + + yaffs_rd_chunk_tags_nand(dev, obj->hdr_chunk, buffer, &tags); + + yaffs_verify_oh(obj, oh, &tags, 1); + + yaffs_release_temp_buffer(dev, buffer, __LINE__); + } + + /* Verify it has a parent */ + if (obj && !obj->fake && (!obj->parent || obj->parent->my_dev != dev)) { + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d has parent pointer %p which does not look like an object", + obj->obj_id, obj->parent); + } + + /* Verify parent is a directory */ + if (obj->parent + && obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d's parent is not a directory (type %d)", + obj->obj_id, obj->parent->variant_type); + } + + switch (obj->variant_type) { + case YAFFS_OBJECT_TYPE_FILE: + yaffs_verify_file(obj); + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + yaffs_verify_symlink(obj); + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + yaffs_verify_dir(obj); + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + yaffs_verify_link(obj); + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + yaffs_verify_special(obj); + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + default: + yaffs_trace(YAFFS_TRACE_VERIFY, + "Obj %d has illegaltype %d", + obj->obj_id, obj->variant_type); + break; + } +} + +void yaffs_verify_objects(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj; + int i; + struct list_head *lh; + + if (yaffs_skip_verification(dev)) + return; + + /* Iterate through the objects in each hash entry */ + + for (i = 0; i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each(lh, &dev->obj_bucket[i].list) { + if (lh) { + obj = + list_entry(lh, struct yaffs_obj, hash_link); + yaffs_verify_obj(obj); + } + } + } +} + +void yaffs_verify_obj_in_dir(struct yaffs_obj *obj) +{ + struct list_head *lh; + struct yaffs_obj *list_obj; + + int count = 0; + + if (!obj) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "No object to verify"); + YBUG(); + return; + } + + if (yaffs_skip_verification(obj->my_dev)) + return; + + if (!obj->parent) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "Object does not have parent" ); + YBUG(); + return; + } + + if (obj->parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "Parent is not directory"); + YBUG(); + } + + /* Iterate through the objects in each hash entry */ + + list_for_each(lh, &obj->parent->variant.dir_variant.children) { + if (lh) { + list_obj = list_entry(lh, struct yaffs_obj, siblings); + yaffs_verify_obj(list_obj); + if (obj == list_obj) + count++; + } + } + + if (count != 1) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Object in directory %d times", + count); + YBUG(); + } +} + +void yaffs_verify_dir(struct yaffs_obj *directory) +{ + struct list_head *lh; + struct yaffs_obj *list_obj; + + if (!directory) { + YBUG(); + return; + } + + if (yaffs_skip_full_verification(directory->my_dev)) + return; + + if (directory->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Directory has wrong type: %d", + directory->variant_type); + YBUG(); + } + + /* Iterate through the objects in each hash entry */ + + list_for_each(lh, &directory->variant.dir_variant.children) { + if (lh) { + list_obj = list_entry(lh, struct yaffs_obj, siblings); + if (list_obj->parent != directory) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Object in directory list has wrong parent %p", + list_obj->parent); + YBUG(); + } + yaffs_verify_obj_in_dir(list_obj); + } + } +} + +static int yaffs_free_verification_failures; + +void yaffs_verify_free_chunks(struct yaffs_dev *dev) +{ + int counted; + int difference; + + if (yaffs_skip_verification(dev)) + return; + + counted = yaffs_count_free_chunks(dev); + + difference = dev->n_free_chunks - counted; + + if (difference) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Freechunks verification failure %d %d %d", + dev->n_free_chunks, counted, difference); + yaffs_free_verification_failures++; + } +} + +int yaffs_verify_file_sane(struct yaffs_obj *in) +{ + in = in; + return YAFFS_OK; +} + diff --git a/fs/yaffs2/yaffs_verify.h b/fs/yaffs2/yaffs_verify.h new file mode 100644 index 00000000000..cc6f8899930 --- /dev/null +++ b/fs/yaffs2/yaffs_verify.h @@ -0,0 +1,43 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_VERIFY_H__ +#define __YAFFS_VERIFY_H__ + +#include "yaffs_guts.h" + +void yaffs_verify_blk(struct yaffs_dev *dev, struct yaffs_block_info *bi, + int n); +void yaffs_verify_collected_blk(struct yaffs_dev *dev, + struct yaffs_block_info *bi, int n); +void yaffs_verify_blocks(struct yaffs_dev *dev); + +void yaffs_verify_oh(struct yaffs_obj *obj, struct yaffs_obj_hdr *oh, + struct yaffs_ext_tags *tags, int parent_check); +void yaffs_verify_file(struct yaffs_obj *obj); +void yaffs_verify_link(struct yaffs_obj *obj); +void yaffs_verify_symlink(struct yaffs_obj *obj); +void yaffs_verify_special(struct yaffs_obj *obj); +void yaffs_verify_obj(struct yaffs_obj *obj); +void yaffs_verify_objects(struct yaffs_dev *dev); +void yaffs_verify_obj_in_dir(struct yaffs_obj *obj); +void yaffs_verify_dir(struct yaffs_obj *directory); +void yaffs_verify_free_chunks(struct yaffs_dev *dev); + +int yaffs_verify_file_sane(struct yaffs_obj *obj); + +int yaffs_skip_verification(struct yaffs_dev *dev); + +#endif diff --git a/fs/yaffs2/yaffs_vfs.c b/fs/yaffs2/yaffs_vfs.c new file mode 100644 index 00000000000..d5b87531400 --- /dev/null +++ b/fs/yaffs2/yaffs_vfs.c @@ -0,0 +1,2792 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * Acknowledgements: + * Luc van OostenRyck for numerous patches. + * Nick Bane for numerous patches. + * Nick Bane for 2.5/2.6 integration. + * Andras Toth for mknod rdev issue. + * Michael Fischer for finding the problem with inode inconsistency. + * Some code bodily lifted from JFFS + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +/* + * + * This is the file system front-end to YAFFS that hooks it up to + * the VFS. + * + * Special notes: + * >> 2.4: sb->u.generic_sbp points to the struct yaffs_dev associated with + * this superblock + * >> 2.6: sb->s_fs_info points to the struct yaffs_dev associated with this + * superblock + * >> inode->u.generic_ip points to the associated struct yaffs_obj. + */ + +/* + * NB There are two variants of Linux VFS glue code. This variant supports + * a single version and should not include any multi-version code. + */ +#include <linux/version.h> + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/fs.h> +#include <linux/proc_fs.h> +#include <linux/smp_lock.h> +#include <linux/pagemap.h> +#include <linux/mtd/mtd.h> +#include <linux/interrupt.h> +#include <linux/string.h> +#include <linux/ctype.h> +#include <linux/namei.h> +#include <linux/exportfs.h> +#include <linux/kthread.h> +#include <linux/delay.h> +#include <linux/freezer.h> + +#include <asm/div64.h> + +#include <linux/statfs.h> + +#define UnlockPage(p) unlock_page(p) +#define Page_Uptodate(page) test_bit(PG_uptodate, &(page)->flags) + +#define yaffs_devname(sb, buf) bdevname(sb->s_bdev, buf) + +#define YPROC_ROOT NULL + +#define Y_INIT_TIMER(a) init_timer_on_stack(a) + +#define WRITE_SIZE_STR "writesize" +#define WRITE_SIZE(mtd) ((mtd)->writesize) + +static uint32_t YCALCBLOCKS(uint64_t partition_size, uint32_t block_size) +{ + uint64_t result = partition_size; + do_div(result, block_size); + return (uint32_t) result; +} + +#include <linux/uaccess.h> +#include <linux/mtd/mtd.h> + +#include "yportenv.h" +#include "yaffs_trace.h" +#include "yaffs_guts.h" +#include "yaffs_attribs.h" + +#include "yaffs_linux.h" + +#include "yaffs_mtdif.h" +#include "yaffs_mtdif1.h" +#include "yaffs_mtdif2.h" + +unsigned int yaffs_trace_mask = YAFFS_TRACE_BAD_BLOCKS | YAFFS_TRACE_ALWAYS; +unsigned int yaffs_wr_attempts = YAFFS_WR_ATTEMPTS; +unsigned int yaffs_auto_checkpoint = 1; +unsigned int yaffs_gc_control = 1; +unsigned int yaffs_bg_enable = 1; + +/* Module Parameters */ +module_param(yaffs_trace_mask, uint, 0644); +module_param(yaffs_wr_attempts, uint, 0644); +module_param(yaffs_auto_checkpoint, uint, 0644); +module_param(yaffs_gc_control, uint, 0644); +module_param(yaffs_bg_enable, uint, 0644); + + +#define yaffs_inode_to_obj_lv(iptr) ((iptr)->i_private) +#define yaffs_inode_to_obj(iptr) ((struct yaffs_obj *)(yaffs_inode_to_obj_lv(iptr))) +#define yaffs_dentry_to_obj(dptr) yaffs_inode_to_obj((dptr)->d_inode) +#define yaffs_super_to_dev(sb) ((struct yaffs_dev *)sb->s_fs_info) + +#define update_dir_time(dir) do {\ + (dir)->i_ctime = (dir)->i_mtime = CURRENT_TIME; \ + } while(0) + + +static unsigned yaffs_gc_control_callback(struct yaffs_dev *dev) +{ + return yaffs_gc_control; +} + +static void yaffs_gross_lock(struct yaffs_dev *dev) +{ + yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locking %p", current); + mutex_lock(&(yaffs_dev_to_lc(dev)->gross_lock)); + yaffs_trace(YAFFS_TRACE_LOCK, "yaffs locked %p", current); +} + +static void yaffs_gross_unlock(struct yaffs_dev *dev) +{ + yaffs_trace(YAFFS_TRACE_LOCK, "yaffs unlocking %p", current); + mutex_unlock(&(yaffs_dev_to_lc(dev)->gross_lock)); +} + +static void yaffs_fill_inode_from_obj(struct inode *inode, + struct yaffs_obj *obj); + +static struct inode *yaffs_iget(struct super_block *sb, unsigned long ino) +{ + struct inode *inode; + struct yaffs_obj *obj; + struct yaffs_dev *dev = yaffs_super_to_dev(sb); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_iget for %lu", ino); + + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + + /* NB This is called as a side effect of other functions, but + * we had to release the lock to prevent deadlocks, so + * need to lock again. + */ + + yaffs_gross_lock(dev); + + obj = yaffs_find_by_number(dev, inode->i_ino); + + yaffs_fill_inode_from_obj(inode, obj); + + yaffs_gross_unlock(dev); + + unlock_new_inode(inode); + return inode; +} + +struct inode *yaffs_get_inode(struct super_block *sb, int mode, int dev, + struct yaffs_obj *obj) +{ + struct inode *inode; + + if (!sb) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_get_inode for NULL super_block!!"); + return NULL; + + } + + if (!obj) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_get_inode for NULL object!!"); + return NULL; + + } + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_get_inode for object %d", + obj->obj_id); + + inode = yaffs_iget(sb, obj->obj_id); + if (IS_ERR(inode)) + return NULL; + + /* NB Side effect: iget calls back to yaffs_read_inode(). */ + /* iget also increments the inode's i_count */ + /* NB You can't be holding gross_lock or deadlock will happen! */ + + return inode; +} + +static int yaffs_mknod(struct inode *dir, struct dentry *dentry, int mode, + dev_t rdev) +{ + struct inode *inode; + + struct yaffs_obj *obj = NULL; + struct yaffs_dev *dev; + + struct yaffs_obj *parent = yaffs_inode_to_obj(dir); + + int error = -ENOSPC; + uid_t uid = current->cred->fsuid; + gid_t gid = + (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid; + + if ((dir->i_mode & S_ISGID) && S_ISDIR(mode)) + mode |= S_ISGID; + + if (parent) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod: parent object %d type %d", + parent->obj_id, parent->variant_type); + } else { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod: could not get parent object"); + return -EPERM; + } + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod: making oject for %s, mode %x dev %x", + dentry->d_name.name, mode, rdev); + + dev = parent->my_dev; + + yaffs_gross_lock(dev); + + switch (mode & S_IFMT) { + default: + /* Special (socket, fifo, device...) */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making special"); + obj = + yaffs_create_special(parent, dentry->d_name.name, mode, uid, + gid, old_encode_dev(rdev)); + break; + case S_IFREG: /* file */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making file"); + obj = yaffs_create_file(parent, dentry->d_name.name, mode, uid, + gid); + break; + case S_IFDIR: /* directory */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making directory"); + obj = yaffs_create_dir(parent, dentry->d_name.name, mode, + uid, gid); + break; + case S_IFLNK: /* symlink */ + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod: making symlink"); + obj = NULL; /* Do we ever get here? */ + break; + } + + /* Can not call yaffs_get_inode() with gross lock held */ + yaffs_gross_unlock(dev); + + if (obj) { + inode = yaffs_get_inode(dir->i_sb, mode, rdev, obj); + d_instantiate(dentry, inode); + update_dir_time(dir); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_mknod created object %d count = %d", + obj->obj_id, atomic_read(&inode->i_count)); + error = 0; + yaffs_fill_inode_from_obj(dir, parent); + } else { + yaffs_trace(YAFFS_TRACE_OS, "yaffs_mknod failed making object"); + error = -ENOMEM; + } + + return error; +} + +static int yaffs_mkdir(struct inode *dir, struct dentry *dentry, int mode) +{ + return yaffs_mknod(dir, dentry, mode | S_IFDIR, 0); +} + +static int yaffs_create(struct inode *dir, struct dentry *dentry, int mode, + struct nameidata *n) +{ + return yaffs_mknod(dir, dentry, mode | S_IFREG, 0); +} + +static int yaffs_link(struct dentry *old_dentry, struct inode *dir, + struct dentry *dentry) +{ + struct inode *inode = old_dentry->d_inode; + struct yaffs_obj *obj = NULL; + struct yaffs_obj *link = NULL; + struct yaffs_dev *dev; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_link"); + + obj = yaffs_inode_to_obj(inode); + dev = obj->my_dev; + + yaffs_gross_lock(dev); + + if (!S_ISDIR(inode->i_mode)) /* Don't link directories */ + link = + yaffs_link_obj(yaffs_inode_to_obj(dir), dentry->d_name.name, + obj); + + if (link) { + old_dentry->d_inode->i_nlink = yaffs_get_obj_link_count(obj); + d_instantiate(dentry, old_dentry->d_inode); + atomic_inc(&old_dentry->d_inode->i_count); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_link link count %d i_count %d", + old_dentry->d_inode->i_nlink, + atomic_read(&old_dentry->d_inode->i_count)); + } + + yaffs_gross_unlock(dev); + + if (link) { + update_dir_time(dir); + return 0; + } + + return -EPERM; +} + +static int yaffs_symlink(struct inode *dir, struct dentry *dentry, + const char *symname) +{ + struct yaffs_obj *obj; + struct yaffs_dev *dev; + uid_t uid = current->cred->fsuid; + gid_t gid = + (dir->i_mode & S_ISGID) ? dir->i_gid : current->cred->fsgid; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_symlink"); + + dev = yaffs_inode_to_obj(dir)->my_dev; + yaffs_gross_lock(dev); + obj = yaffs_create_symlink(yaffs_inode_to_obj(dir), dentry->d_name.name, + S_IFLNK | S_IRWXUGO, uid, gid, symname); + yaffs_gross_unlock(dev); + + if (obj) { + struct inode *inode; + + inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); + d_instantiate(dentry, inode); + update_dir_time(dir); + yaffs_trace(YAFFS_TRACE_OS, "symlink created OK"); + return 0; + } else { + yaffs_trace(YAFFS_TRACE_OS, "symlink not created"); + } + + return -ENOMEM; +} + +static struct dentry *yaffs_lookup(struct inode *dir, struct dentry *dentry, + struct nameidata *n) +{ + struct yaffs_obj *obj; + struct inode *inode = NULL; + + struct yaffs_dev *dev = yaffs_inode_to_obj(dir)->my_dev; + + if (current != yaffs_dev_to_lc(dev)->readdir_process) + yaffs_gross_lock(dev); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_lookup for %d:%s", + yaffs_inode_to_obj(dir)->obj_id, dentry->d_name.name); + + obj = yaffs_find_by_name(yaffs_inode_to_obj(dir), dentry->d_name.name); + + obj = yaffs_get_equivalent_obj(obj); /* in case it was a hardlink */ + + /* Can't hold gross lock when calling yaffs_get_inode() */ + if (current != yaffs_dev_to_lc(dev)->readdir_process) + yaffs_gross_unlock(dev); + + if (obj) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_lookup found %d", obj->obj_id); + + inode = yaffs_get_inode(dir->i_sb, obj->yst_mode, 0, obj); + + if (inode) { + yaffs_trace(YAFFS_TRACE_OS, "yaffs_loookup dentry"); + d_add(dentry, inode); + /* return dentry; */ + return NULL; + } + + } else { + yaffs_trace(YAFFS_TRACE_OS, "yaffs_lookup not found"); + + } + + d_add(dentry, inode); + + return NULL; +} + +static int yaffs_unlink(struct inode *dir, struct dentry *dentry) +{ + int ret_val; + + struct yaffs_dev *dev; + struct yaffs_obj *obj; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_unlink %d:%s", + (int)(dir->i_ino), dentry->d_name.name); + obj = yaffs_inode_to_obj(dir); + dev = obj->my_dev; + + yaffs_gross_lock(dev); + + ret_val = yaffs_unlinker(obj, dentry->d_name.name); + + if (ret_val == YAFFS_OK) { + dentry->d_inode->i_nlink--; + dir->i_version++; + yaffs_gross_unlock(dev); + mark_inode_dirty(dentry->d_inode); + update_dir_time(dir); + return 0; + } + yaffs_gross_unlock(dev); + return -ENOTEMPTY; +} + +static int yaffs_sync_object(struct file *file, int datasync) +{ + + struct yaffs_obj *obj; + struct yaffs_dev *dev; + struct dentry *dentry = file->f_path.dentry; + + obj = yaffs_dentry_to_obj(dentry); + + dev = obj->my_dev; + + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, "yaffs_sync_object"); + yaffs_gross_lock(dev); + yaffs_flush_file(obj, 1, datasync); + yaffs_gross_unlock(dev); + return 0; +} +/* + * The VFS layer already does all the dentry stuff for rename. + * + * NB: POSIX says you can rename an object over an old object of the same name + */ +static int yaffs_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) +{ + struct yaffs_dev *dev; + int ret_val = YAFFS_FAIL; + struct yaffs_obj *target; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_rename"); + dev = yaffs_inode_to_obj(old_dir)->my_dev; + + yaffs_gross_lock(dev); + + /* Check if the target is an existing directory that is not empty. */ + target = yaffs_find_by_name(yaffs_inode_to_obj(new_dir), + new_dentry->d_name.name); + + if (target && target->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY && + !list_empty(&target->variant.dir_variant.children)) { + + yaffs_trace(YAFFS_TRACE_OS, "target is non-empty dir"); + + ret_val = YAFFS_FAIL; + } else { + /* Now does unlinking internally using shadowing mechanism */ + yaffs_trace(YAFFS_TRACE_OS, "calling yaffs_rename_obj"); + + ret_val = yaffs_rename_obj(yaffs_inode_to_obj(old_dir), + old_dentry->d_name.name, + yaffs_inode_to_obj(new_dir), + new_dentry->d_name.name); + } + yaffs_gross_unlock(dev); + + if (ret_val == YAFFS_OK) { + if (target) { + new_dentry->d_inode->i_nlink--; + mark_inode_dirty(new_dentry->d_inode); + } + + update_dir_time(old_dir); + if (old_dir != new_dir) + update_dir_time(new_dir); + return 0; + } else { + return -ENOTEMPTY; + } +} + +static int yaffs_setattr(struct dentry *dentry, struct iattr *attr) +{ + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_setattr of object %d", + yaffs_inode_to_obj(inode)->obj_id); + + /* Fail if a requested resize >= 2GB */ + if (attr->ia_valid & ATTR_SIZE && (attr->ia_size >> 31)) + error = -EINVAL; + + if (error == 0) + error = inode_change_ok(inode, attr); + if (error == 0) { + int result; + if (!error) { + setattr_copy(inode, attr); + yaffs_trace(YAFFS_TRACE_OS, "inode_setattr called"); + if (attr->ia_valid & ATTR_SIZE) { + truncate_setsize(inode, attr->ia_size); + inode->i_blocks = (inode->i_size + 511) >> 9; + } + } + dev = yaffs_inode_to_obj(inode)->my_dev; + if (attr->ia_valid & ATTR_SIZE) { + yaffs_trace(YAFFS_TRACE_OS, "resize to %d(%x)", + (int)(attr->ia_size), + (int)(attr->ia_size)); + } + yaffs_gross_lock(dev); + result = yaffs_set_attribs(yaffs_inode_to_obj(inode), attr); + if (result == YAFFS_OK) { + error = 0; + } else { + error = -EPERM; + } + yaffs_gross_unlock(dev); + + } + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_setattr done returning %d", error); + + return error; +} + +#ifdef CONFIG_YAFFS_XATTR +static int yaffs_setxattr(struct dentry *dentry, const char *name, + const void *value, size_t size, int flags) +{ + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr of object %d", obj->obj_id); + + if (error == 0) { + int result; + dev = obj->my_dev; + yaffs_gross_lock(dev); + result = yaffs_set_xattrib(obj, name, value, size, flags); + if (result == YAFFS_OK) + error = 0; + else if (result < 0) + error = result; + yaffs_gross_unlock(dev); + + } + yaffs_trace(YAFFS_TRACE_OS, "yaffs_setxattr done returning %d", error); + + return error; +} + +static ssize_t yaffs_getxattr(struct dentry * dentry, const char *name, void *buff, + size_t size) +{ + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_getxattr \"%s\" from object %d", + name, obj->obj_id); + + if (error == 0) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + error = yaffs_get_xattrib(obj, name, buff, size); + yaffs_gross_unlock(dev); + + } + yaffs_trace(YAFFS_TRACE_OS, "yaffs_getxattr done returning %d", error); + + return error; +} + +static int yaffs_removexattr(struct dentry *dentry, const char *name) +{ + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_removexattr of object %d", obj->obj_id); + + if (error == 0) { + int result; + dev = obj->my_dev; + yaffs_gross_lock(dev); + result = yaffs_remove_xattrib(obj, name); + if (result == YAFFS_OK) + error = 0; + else if (result < 0) + error = result; + yaffs_gross_unlock(dev); + + } + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_removexattr done returning %d", error); + + return error; +} + +static ssize_t yaffs_listxattr(struct dentry * dentry, char *buff, size_t size) +{ + struct inode *inode = dentry->d_inode; + int error = 0; + struct yaffs_dev *dev; + struct yaffs_obj *obj = yaffs_inode_to_obj(inode); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_listxattr of object %d", obj->obj_id); + + if (error == 0) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + error = yaffs_list_xattrib(obj, buff, size); + yaffs_gross_unlock(dev); + + } + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_listxattr done returning %d", error); + + return error; +} + +#endif + +static const struct inode_operations yaffs_dir_inode_operations = { + .create = yaffs_create, + .lookup = yaffs_lookup, + .link = yaffs_link, + .unlink = yaffs_unlink, + .symlink = yaffs_symlink, + .mkdir = yaffs_mkdir, + .rmdir = yaffs_unlink, + .mknod = yaffs_mknod, + .rename = yaffs_rename, + .setattr = yaffs_setattr, +#ifdef CONFIG_YAFFS_XATTR + .setxattr = yaffs_setxattr, + .getxattr = yaffs_getxattr, + .listxattr = yaffs_listxattr, + .removexattr = yaffs_removexattr, +#endif +}; +/*-----------------------------------------------------------------*/ +/* Directory search context allows us to unlock access to yaffs during + * filldir without causing problems with the directory being modified. + * This is similar to the tried and tested mechanism used in yaffs direct. + * + * A search context iterates along a doubly linked list of siblings in the + * directory. If the iterating object is deleted then this would corrupt + * the list iteration, likely causing a crash. The search context avoids + * this by using the remove_obj_fn to move the search context to the + * next object before the object is deleted. + * + * Many readdirs (and thus seach conexts) may be alive simulateously so + * each struct yaffs_dev has a list of these. + * + * A seach context lives for the duration of a readdir. + * + * All these functions must be called while yaffs is locked. + */ + +struct yaffs_search_context { + struct yaffs_dev *dev; + struct yaffs_obj *dir_obj; + struct yaffs_obj *next_return; + struct list_head others; +}; + +/* + * yaffs_new_search() creates a new search context, initialises it and + * adds it to the device's search context list. + * + * Called at start of readdir. + */ +static struct yaffs_search_context *yaffs_new_search(struct yaffs_obj *dir) +{ + struct yaffs_dev *dev = dir->my_dev; + struct yaffs_search_context *sc = + kmalloc(sizeof(struct yaffs_search_context), GFP_NOFS); + if (sc) { + sc->dir_obj = dir; + sc->dev = dev; + if (list_empty(&sc->dir_obj->variant.dir_variant.children)) + sc->next_return = NULL; + else + sc->next_return = + list_entry(dir->variant.dir_variant.children.next, + struct yaffs_obj, siblings); + INIT_LIST_HEAD(&sc->others); + list_add(&sc->others, &(yaffs_dev_to_lc(dev)->search_contexts)); + } + return sc; +} + +/* + * yaffs_search_end() disposes of a search context and cleans up. + */ +static void yaffs_search_end(struct yaffs_search_context *sc) +{ + if (sc) { + list_del(&sc->others); + kfree(sc); + } +} + +/* + * yaffs_search_advance() moves a search context to the next object. + * Called when the search iterates or when an object removal causes + * the search context to be moved to the next object. + */ +static void yaffs_search_advance(struct yaffs_search_context *sc) +{ + if (!sc) + return; + + if (sc->next_return == NULL || + list_empty(&sc->dir_obj->variant.dir_variant.children)) + sc->next_return = NULL; + else { + struct list_head *next = sc->next_return->siblings.next; + + if (next == &sc->dir_obj->variant.dir_variant.children) + sc->next_return = NULL; /* end of list */ + else + sc->next_return = + list_entry(next, struct yaffs_obj, siblings); + } +} + +/* + * yaffs_remove_obj_callback() is called when an object is unlinked. + * We check open search contexts and advance any which are currently + * on the object being iterated. + */ +static void yaffs_remove_obj_callback(struct yaffs_obj *obj) +{ + + struct list_head *i; + struct yaffs_search_context *sc; + struct list_head *search_contexts = + &(yaffs_dev_to_lc(obj->my_dev)->search_contexts); + + /* Iterate through the directory search contexts. + * If any are currently on the object being removed, then advance + * the search context to the next object to prevent a hanging pointer. + */ + list_for_each(i, search_contexts) { + if (i) { + sc = list_entry(i, struct yaffs_search_context, others); + if (sc->next_return == obj) + yaffs_search_advance(sc); + } + } + +} + +static int yaffs_readdir(struct file *f, void *dirent, filldir_t filldir) +{ + struct yaffs_obj *obj; + struct yaffs_dev *dev; + struct yaffs_search_context *sc; + struct inode *inode = f->f_dentry->d_inode; + unsigned long offset, curoffs; + struct yaffs_obj *l; + int ret_val = 0; + + char name[YAFFS_MAX_NAME_LENGTH + 1]; + + obj = yaffs_dentry_to_obj(f->f_dentry); + dev = obj->my_dev; + + yaffs_gross_lock(dev); + + yaffs_dev_to_lc(dev)->readdir_process = current; + + offset = f->f_pos; + + sc = yaffs_new_search(obj); + if (!sc) { + ret_val = -ENOMEM; + goto out; + } + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: starting at %d", (int)offset); + + if (offset == 0) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: entry . ino %d", + (int)inode->i_ino); + yaffs_gross_unlock(dev); + if (filldir(dirent, ".", 1, offset, inode->i_ino, DT_DIR) < 0) { + yaffs_gross_lock(dev); + goto out; + } + yaffs_gross_lock(dev); + offset++; + f->f_pos++; + } + if (offset == 1) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: entry .. ino %d", + (int)f->f_dentry->d_parent->d_inode->i_ino); + yaffs_gross_unlock(dev); + if (filldir(dirent, "..", 2, offset, + f->f_dentry->d_parent->d_inode->i_ino, + DT_DIR) < 0) { + yaffs_gross_lock(dev); + goto out; + } + yaffs_gross_lock(dev); + offset++; + f->f_pos++; + } + + curoffs = 1; + + /* If the directory has changed since the open or last call to + readdir, rewind to after the 2 canned entries. */ + if (f->f_version != inode->i_version) { + offset = 2; + f->f_pos = offset; + f->f_version = inode->i_version; + } + + while (sc->next_return) { + curoffs++; + l = sc->next_return; + if (curoffs >= offset) { + int this_inode = yaffs_get_obj_inode(l); + int this_type = yaffs_get_obj_type(l); + + yaffs_get_obj_name(l, name, YAFFS_MAX_NAME_LENGTH + 1); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readdir: %s inode %d", + name, yaffs_get_obj_inode(l)); + + yaffs_gross_unlock(dev); + + if (filldir(dirent, + name, + strlen(name), + offset, this_inode, this_type) < 0) { + yaffs_gross_lock(dev); + goto out; + } + + yaffs_gross_lock(dev); + + offset++; + f->f_pos++; + } + yaffs_search_advance(sc); + } + +out: + yaffs_search_end(sc); + yaffs_dev_to_lc(dev)->readdir_process = NULL; + yaffs_gross_unlock(dev); + + return ret_val; +} + +static const struct file_operations yaffs_dir_operations = { + .read = generic_read_dir, + .readdir = yaffs_readdir, + .fsync = yaffs_sync_object, + .llseek = generic_file_llseek, +}; + + + +static int yaffs_file_flush(struct file *file, fl_owner_t id) +{ + struct yaffs_obj *obj = yaffs_dentry_to_obj(file->f_dentry); + + struct yaffs_dev *dev = obj->my_dev; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_flush object %d (%s)", + obj->obj_id, obj->dirty ? "dirty" : "clean"); + + yaffs_gross_lock(dev); + + yaffs_flush_file(obj, 1, 0); + + yaffs_gross_unlock(dev); + + return 0; +} + +static const struct file_operations yaffs_file_operations = { + .read = do_sync_read, + .write = do_sync_write, + .aio_read = generic_file_aio_read, + .aio_write = generic_file_aio_write, + .mmap = generic_file_mmap, + .flush = yaffs_file_flush, + .fsync = yaffs_sync_object, + .splice_read = generic_file_splice_read, + .splice_write = generic_file_splice_write, + .llseek = generic_file_llseek, +}; + + +/* ExportFS support */ +static struct inode *yaffs2_nfs_get_inode(struct super_block *sb, uint64_t ino, + uint32_t generation) +{ + return yaffs_iget(sb, ino); +} + +static struct dentry *yaffs2_fh_to_dentry(struct super_block *sb, + struct fid *fid, int fh_len, + int fh_type) +{ + return generic_fh_to_dentry(sb, fid, fh_len, fh_type, + yaffs2_nfs_get_inode); +} + +static struct dentry *yaffs2_fh_to_parent(struct super_block *sb, + struct fid *fid, int fh_len, + int fh_type) +{ + return generic_fh_to_parent(sb, fid, fh_len, fh_type, + yaffs2_nfs_get_inode); +} + +struct dentry *yaffs2_get_parent(struct dentry *dentry) +{ + + struct super_block *sb = dentry->d_inode->i_sb; + struct dentry *parent = ERR_PTR(-ENOENT); + struct inode *inode; + unsigned long parent_ino; + struct yaffs_obj *d_obj; + struct yaffs_obj *parent_obj; + + d_obj = yaffs_inode_to_obj(dentry->d_inode); + + if (d_obj) { + parent_obj = d_obj->parent; + if (parent_obj) { + parent_ino = yaffs_get_obj_inode(parent_obj); + inode = yaffs_iget(sb, parent_ino); + + if (IS_ERR(inode)) { + parent = ERR_CAST(inode); + } else { + parent = d_obtain_alias(inode); + if (!IS_ERR(parent)) { + parent = ERR_PTR(-ENOMEM); + iput(inode); + } + } + } + } + + return parent; +} + +/* Just declare a zero structure as a NULL value implies + * using the default functions of exportfs. + */ + +static struct export_operations yaffs_export_ops = { + .fh_to_dentry = yaffs2_fh_to_dentry, + .fh_to_parent = yaffs2_fh_to_parent, + .get_parent = yaffs2_get_parent, +}; + + +/*-----------------------------------------------------------------*/ + +static int yaffs_readlink(struct dentry *dentry, char __user * buffer, + int buflen) +{ + unsigned char *alias; + int ret; + + struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; + + yaffs_gross_lock(dev); + + alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); + + yaffs_gross_unlock(dev); + + if (!alias) + return -ENOMEM; + + ret = vfs_readlink(dentry, buffer, buflen, alias); + kfree(alias); + return ret; +} + +static void *yaffs_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + unsigned char *alias; + void *ret; + struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; + + yaffs_gross_lock(dev); + + alias = yaffs_get_symlink_alias(yaffs_dentry_to_obj(dentry)); + yaffs_gross_unlock(dev); + + if (!alias) { + ret = ERR_PTR(-ENOMEM); + goto out; + } + + nd_set_link(nd, alias); + ret = (void *)alias; +out: + return ret; +} + +void yaffs_put_link(struct dentry *dentry, struct nameidata *nd, void *alias) +{ + kfree(alias); +} + + +static void yaffs_unstitch_obj(struct inode *inode, struct yaffs_obj *obj) +{ + /* Clear the association between the inode and + * the struct yaffs_obj. + */ + obj->my_inode = NULL; + yaffs_inode_to_obj_lv(inode) = NULL; + + /* If the object freeing was deferred, then the real + * free happens now. + * This should fix the inode inconsistency problem. + */ + yaffs_handle_defered_free(obj); +} + +/* yaffs_evict_inode combines into one operation what was previously done in + * yaffs_clear_inode() and yaffs_delete_inode() + * + */ +static void yaffs_evict_inode(struct inode *inode) +{ + struct yaffs_obj *obj; + struct yaffs_dev *dev; + int deleteme = 0; + + obj = yaffs_inode_to_obj(inode); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_evict_inode: ino %d, count %d %s", + (int)inode->i_ino, + atomic_read(&inode->i_count), + obj ? "object exists" : "null object"); + + if (!inode->i_nlink && !is_bad_inode(inode)) + deleteme = 1; + truncate_inode_pages(&inode->i_data, 0); + end_writeback(inode); + + if (deleteme && obj) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + yaffs_del_obj(obj); + yaffs_gross_unlock(dev); + } + if (obj) { + dev = obj->my_dev; + yaffs_gross_lock(dev); + yaffs_unstitch_obj(inode, obj); + yaffs_gross_unlock(dev); + } + +} + +static void yaffs_touch_super(struct yaffs_dev *dev) +{ + struct super_block *sb = yaffs_dev_to_lc(dev)->super; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_touch_super() sb = %p", sb); + if (sb) + sb->s_dirt = 1; +} + +static int yaffs_readpage_nolock(struct file *f, struct page *pg) +{ + /* Lifted from jffs2 */ + + struct yaffs_obj *obj; + unsigned char *pg_buf; + int ret; + + struct yaffs_dev *dev; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_readpage_nolock at %08x, size %08x", + (unsigned)(pg->index << PAGE_CACHE_SHIFT), + (unsigned)PAGE_CACHE_SIZE); + + obj = yaffs_dentry_to_obj(f->f_dentry); + + dev = obj->my_dev; + + BUG_ON(!PageLocked(pg)); + + pg_buf = kmap(pg); + /* FIXME: Can kmap fail? */ + + yaffs_gross_lock(dev); + + ret = yaffs_file_rd(obj, pg_buf, + pg->index << PAGE_CACHE_SHIFT, PAGE_CACHE_SIZE); + + yaffs_gross_unlock(dev); + + if (ret >= 0) + ret = 0; + + if (ret) { + ClearPageUptodate(pg); + SetPageError(pg); + } else { + SetPageUptodate(pg); + ClearPageError(pg); + } + + flush_dcache_page(pg); + kunmap(pg); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage_nolock done"); + return ret; +} + +static int yaffs_readpage_unlock(struct file *f, struct page *pg) +{ + int ret = yaffs_readpage_nolock(f, pg); + UnlockPage(pg); + return ret; +} + +static int yaffs_readpage(struct file *f, struct page *pg) +{ + int ret; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage"); + ret = yaffs_readpage_unlock(f, pg); + yaffs_trace(YAFFS_TRACE_OS, "yaffs_readpage done"); + return ret; +} + +/* writepage inspired by/stolen from smbfs */ + +static int yaffs_writepage(struct page *page, struct writeback_control *wbc) +{ + struct yaffs_dev *dev; + struct address_space *mapping = page->mapping; + struct inode *inode; + unsigned long end_index; + char *buffer; + struct yaffs_obj *obj; + int n_written = 0; + unsigned n_bytes; + loff_t i_size; + + if (!mapping) + BUG(); + inode = mapping->host; + if (!inode) + BUG(); + i_size = i_size_read(inode); + + end_index = i_size >> PAGE_CACHE_SHIFT; + + if (page->index < end_index) + n_bytes = PAGE_CACHE_SIZE; + else { + n_bytes = i_size & (PAGE_CACHE_SIZE - 1); + + if (page->index > end_index || !n_bytes) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_writepage at %08x, inode size = %08x!!!", + (unsigned)(page->index << PAGE_CACHE_SHIFT), + (unsigned)inode->i_size); + yaffs_trace(YAFFS_TRACE_OS, + " -> don't care!!"); + + zero_user_segment(page, 0, PAGE_CACHE_SIZE); + set_page_writeback(page); + unlock_page(page); + end_page_writeback(page); + return 0; + } + } + + if (n_bytes != PAGE_CACHE_SIZE) + zero_user_segment(page, n_bytes, PAGE_CACHE_SIZE); + + get_page(page); + + buffer = kmap(page); + + obj = yaffs_inode_to_obj(inode); + dev = obj->my_dev; + yaffs_gross_lock(dev); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_writepage at %08x, size %08x", + (unsigned)(page->index << PAGE_CACHE_SHIFT), n_bytes); + yaffs_trace(YAFFS_TRACE_OS, + "writepag0: obj = %05x, ino = %05x", + (int)obj->variant.file_variant.file_size, (int)inode->i_size); + + n_written = yaffs_wr_file(obj, buffer, + page->index << PAGE_CACHE_SHIFT, n_bytes, 0); + + yaffs_touch_super(dev); + + yaffs_trace(YAFFS_TRACE_OS, + "writepag1: obj = %05x, ino = %05x", + (int)obj->variant.file_variant.file_size, (int)inode->i_size); + + yaffs_gross_unlock(dev); + + kunmap(page); + set_page_writeback(page); + unlock_page(page); + end_page_writeback(page); + put_page(page); + + return (n_written == n_bytes) ? 0 : -ENOSPC; +} + +/* Space holding and freeing is done to ensure we have space available for + * write_begin/end. + * For now we just assume few parallel writes and check against a small + * number. + * Todo: need to do this with a counter to handle parallel reads better. + */ + +static ssize_t yaffs_hold_space(struct file *f) +{ + struct yaffs_obj *obj; + struct yaffs_dev *dev; + + int n_free_chunks; + + obj = yaffs_dentry_to_obj(f->f_dentry); + + dev = obj->my_dev; + + yaffs_gross_lock(dev); + + n_free_chunks = yaffs_get_n_free_chunks(dev); + + yaffs_gross_unlock(dev); + + return (n_free_chunks > 20) ? 1 : 0; +} + +static void yaffs_release_space(struct file *f) +{ + struct yaffs_obj *obj; + struct yaffs_dev *dev; + + obj = yaffs_dentry_to_obj(f->f_dentry); + + dev = obj->my_dev; + + yaffs_gross_lock(dev); + + yaffs_gross_unlock(dev); +} + +static int yaffs_write_begin(struct file *filp, struct address_space *mapping, + loff_t pos, unsigned len, unsigned flags, + struct page **pagep, void **fsdata) +{ + struct page *pg = NULL; + pgoff_t index = pos >> PAGE_CACHE_SHIFT; + + int ret = 0; + int space_held = 0; + + /* Get a page */ + pg = grab_cache_page_write_begin(mapping, index, flags); + + *pagep = pg; + if (!pg) { + ret = -ENOMEM; + goto out; + } + yaffs_trace(YAFFS_TRACE_OS, + "start yaffs_write_begin index %d(%x) uptodate %d", + (int)index, (int)index, Page_Uptodate(pg) ? 1 : 0); + + /* Get fs space */ + space_held = yaffs_hold_space(filp); + + if (!space_held) { + ret = -ENOSPC; + goto out; + } + + /* Update page if required */ + + if (!Page_Uptodate(pg)) + ret = yaffs_readpage_nolock(filp, pg); + + if (ret) + goto out; + + /* Happy path return */ + yaffs_trace(YAFFS_TRACE_OS, "end yaffs_write_begin - ok"); + + return 0; + +out: + yaffs_trace(YAFFS_TRACE_OS, + "end yaffs_write_begin fail returning %d", ret); + if (space_held) + yaffs_release_space(filp); + if (pg) { + unlock_page(pg); + page_cache_release(pg); + } + return ret; +} + +static ssize_t yaffs_file_write(struct file *f, const char *buf, size_t n, + loff_t * pos) +{ + struct yaffs_obj *obj; + int n_written, ipos; + struct inode *inode; + struct yaffs_dev *dev; + + obj = yaffs_dentry_to_obj(f->f_dentry); + + dev = obj->my_dev; + + yaffs_gross_lock(dev); + + inode = f->f_dentry->d_inode; + + if (!S_ISBLK(inode->i_mode) && f->f_flags & O_APPEND) + ipos = inode->i_size; + else + ipos = *pos; + + if (!obj) + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write: hey obj is null!"); + else + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write about to write writing %u(%x) bytes to object %d at %d(%x)", + (unsigned)n, (unsigned)n, obj->obj_id, ipos, ipos); + + n_written = yaffs_wr_file(obj, buf, ipos, n, 0); + + yaffs_touch_super(dev); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write: %d(%x) bytes written", + (unsigned)n, (unsigned)n); + + if (n_written > 0) { + ipos += n_written; + *pos = ipos; + if (ipos > inode->i_size) { + inode->i_size = ipos; + inode->i_blocks = (ipos + 511) >> 9; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_file_write size updated to %d bytes, %d blocks", + ipos, (int)(inode->i_blocks)); + } + + } + yaffs_gross_unlock(dev); + return (n_written == 0) && (n > 0) ? -ENOSPC : n_written; +} + +static int yaffs_write_end(struct file *filp, struct address_space *mapping, + loff_t pos, unsigned len, unsigned copied, + struct page *pg, void *fsdadata) +{ + int ret = 0; + void *addr, *kva; + uint32_t offset_into_page = pos & (PAGE_CACHE_SIZE - 1); + + kva = kmap(pg); + addr = kva + offset_into_page; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_write_end addr %p pos %x n_bytes %d", + addr, (unsigned)pos, copied); + + ret = yaffs_file_write(filp, addr, copied, &pos); + + if (ret != copied) { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_write_end not same size ret %d copied %d", + ret, copied); + SetPageError(pg); + } + + kunmap(pg); + + yaffs_release_space(filp); + unlock_page(pg); + page_cache_release(pg); + return ret; +} + +static int yaffs_statfs(struct dentry *dentry, struct kstatfs *buf) +{ + struct yaffs_dev *dev = yaffs_dentry_to_obj(dentry)->my_dev; + struct super_block *sb = dentry->d_sb; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_statfs"); + + yaffs_gross_lock(dev); + + buf->f_type = YAFFS_MAGIC; + buf->f_bsize = sb->s_blocksize; + buf->f_namelen = 255; + + if (dev->data_bytes_per_chunk & (dev->data_bytes_per_chunk - 1)) { + /* Do this if chunk size is not a power of 2 */ + + uint64_t bytes_in_dev; + uint64_t bytes_free; + + bytes_in_dev = + ((uint64_t) + ((dev->param.end_block - dev->param.start_block + + 1))) * ((uint64_t) (dev->param.chunks_per_block * + dev->data_bytes_per_chunk)); + + do_div(bytes_in_dev, sb->s_blocksize); /* bytes_in_dev becomes the number of blocks */ + buf->f_blocks = bytes_in_dev; + + bytes_free = ((uint64_t) (yaffs_get_n_free_chunks(dev))) * + ((uint64_t) (dev->data_bytes_per_chunk)); + + do_div(bytes_free, sb->s_blocksize); + + buf->f_bfree = bytes_free; + + } else if (sb->s_blocksize > dev->data_bytes_per_chunk) { + + buf->f_blocks = + (dev->param.end_block - dev->param.start_block + 1) * + dev->param.chunks_per_block / + (sb->s_blocksize / dev->data_bytes_per_chunk); + buf->f_bfree = + yaffs_get_n_free_chunks(dev) / + (sb->s_blocksize / dev->data_bytes_per_chunk); + } else { + buf->f_blocks = + (dev->param.end_block - dev->param.start_block + 1) * + dev->param.chunks_per_block * + (dev->data_bytes_per_chunk / sb->s_blocksize); + + buf->f_bfree = + yaffs_get_n_free_chunks(dev) * + (dev->data_bytes_per_chunk / sb->s_blocksize); + } + + buf->f_files = 0; + buf->f_ffree = 0; + buf->f_bavail = buf->f_bfree; + + yaffs_gross_unlock(dev); + return 0; +} + +static void yaffs_flush_inodes(struct super_block *sb) +{ + struct inode *iptr; + struct yaffs_obj *obj; + + list_for_each_entry(iptr, &sb->s_inodes, i_sb_list) { + obj = yaffs_inode_to_obj(iptr); + if (obj) { + yaffs_trace(YAFFS_TRACE_OS, + "flushing obj %d", obj->obj_id); + yaffs_flush_file(obj, 1, 0); + } + } +} + +static void yaffs_flush_super(struct super_block *sb, int do_checkpoint) +{ + struct yaffs_dev *dev = yaffs_super_to_dev(sb); + if (!dev) + return; + + yaffs_flush_inodes(sb); + yaffs_update_dirty_dirs(dev); + yaffs_flush_whole_cache(dev); + if (do_checkpoint) + yaffs_checkpoint_save(dev); +} + +static unsigned yaffs_bg_gc_urgency(struct yaffs_dev *dev) +{ + unsigned erased_chunks = + dev->n_erased_blocks * dev->param.chunks_per_block; + struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); + unsigned scattered = 0; /* Free chunks not in an erased block */ + + if (erased_chunks < dev->n_free_chunks) + scattered = (dev->n_free_chunks - erased_chunks); + + if (!context->bg_running) + return 0; + else if (scattered < (dev->param.chunks_per_block * 2)) + return 0; + else if (erased_chunks > dev->n_free_chunks / 2) + return 0; + else if (erased_chunks > dev->n_free_chunks / 4) + return 1; + else + return 2; +} + +static int yaffs_do_sync_fs(struct super_block *sb, int request_checkpoint) +{ + + struct yaffs_dev *dev = yaffs_super_to_dev(sb); + unsigned int oneshot_checkpoint = (yaffs_auto_checkpoint & 4); + unsigned gc_urgent = yaffs_bg_gc_urgency(dev); + int do_checkpoint; + + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, + "yaffs_do_sync_fs: gc-urgency %d %s %s%s", + gc_urgent, + sb->s_dirt ? "dirty" : "clean", + request_checkpoint ? "checkpoint requested" : "no checkpoint", + oneshot_checkpoint ? " one-shot" : ""); + + yaffs_gross_lock(dev); + do_checkpoint = ((request_checkpoint && !gc_urgent) || + oneshot_checkpoint) && !dev->is_checkpointed; + + if (sb->s_dirt || do_checkpoint) { + yaffs_flush_super(sb, !dev->is_checkpointed && do_checkpoint); + sb->s_dirt = 0; + if (oneshot_checkpoint) + yaffs_auto_checkpoint &= ~4; + } + yaffs_gross_unlock(dev); + + return 0; +} + +/* + * yaffs background thread functions . + * yaffs_bg_thread_fn() the thread function + * yaffs_bg_start() launches the background thread. + * yaffs_bg_stop() cleans up the background thread. + * + * NB: + * The thread should only run after the yaffs is initialised + * The thread should be stopped before yaffs is unmounted. + * The thread should not do any writing while the fs is in read only. + */ + +void yaffs_background_waker(unsigned long data) +{ + wake_up_process((struct task_struct *)data); +} + +static int yaffs_bg_thread_fn(void *data) +{ + struct yaffs_dev *dev = (struct yaffs_dev *)data; + struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); + unsigned long now = jiffies; + unsigned long next_dir_update = now; + unsigned long next_gc = now; + unsigned long expires; + unsigned int urgency; + + int gc_result; + struct timer_list timer; + + yaffs_trace(YAFFS_TRACE_BACKGROUND, + "yaffs_background starting for dev %p", (void *)dev); + + set_freezable(); + while (context->bg_running) { + yaffs_trace(YAFFS_TRACE_BACKGROUND, "yaffs_background"); + + if (kthread_should_stop()) + break; + + if (try_to_freeze()) + continue; + + yaffs_gross_lock(dev); + + now = jiffies; + + if (time_after(now, next_dir_update) && yaffs_bg_enable) { + yaffs_update_dirty_dirs(dev); + next_dir_update = now + HZ; + } + + if (time_after(now, next_gc) && yaffs_bg_enable) { + if (!dev->is_checkpointed) { + urgency = yaffs_bg_gc_urgency(dev); + gc_result = yaffs_bg_gc(dev, urgency); + if (urgency > 1) + next_gc = now + HZ / 20 + 1; + else if (urgency > 0) + next_gc = now + HZ / 10 + 1; + else + next_gc = now + HZ * 2; + } else { + /* + * gc not running so set to next_dir_update + * to cut down on wake ups + */ + next_gc = next_dir_update; + } + } + yaffs_gross_unlock(dev); + expires = next_dir_update; + if (time_before(next_gc, expires)) + expires = next_gc; + if (time_before(expires, now)) + expires = now + HZ; + + Y_INIT_TIMER(&timer); + timer.expires = expires + 1; + timer.data = (unsigned long)current; + timer.function = yaffs_background_waker; + + set_current_state(TASK_INTERRUPTIBLE); + add_timer(&timer); + schedule(); + del_timer_sync(&timer); + } + + return 0; +} + +static int yaffs_bg_start(struct yaffs_dev *dev) +{ + int retval = 0; + struct yaffs_linux_context *context = yaffs_dev_to_lc(dev); + + if (dev->read_only) + return -1; + + context->bg_running = 1; + + context->bg_thread = kthread_run(yaffs_bg_thread_fn, + (void *)dev, "yaffs-bg-%d", + context->mount_id); + + if (IS_ERR(context->bg_thread)) { + retval = PTR_ERR(context->bg_thread); + context->bg_thread = NULL; + context->bg_running = 0; + } + return retval; +} + +static void yaffs_bg_stop(struct yaffs_dev *dev) +{ + struct yaffs_linux_context *ctxt = yaffs_dev_to_lc(dev); + + ctxt->bg_running = 0; + + if (ctxt->bg_thread) { + kthread_stop(ctxt->bg_thread); + ctxt->bg_thread = NULL; + } +} + +static void yaffs_write_super(struct super_block *sb) +{ + unsigned request_checkpoint = (yaffs_auto_checkpoint >= 2); + + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC | YAFFS_TRACE_BACKGROUND, + "yaffs_write_super%s", + request_checkpoint ? " checkpt" : ""); + + yaffs_do_sync_fs(sb, request_checkpoint); + +} + +static int yaffs_sync_fs(struct super_block *sb, int wait) +{ + unsigned request_checkpoint = (yaffs_auto_checkpoint >= 1); + + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_SYNC, + "yaffs_sync_fs%s", request_checkpoint ? " checkpt" : ""); + + yaffs_do_sync_fs(sb, request_checkpoint); + + return 0; +} + + +static LIST_HEAD(yaffs_context_list); +struct mutex yaffs_context_lock; + + + +struct yaffs_options { + int inband_tags; + int skip_checkpoint_read; + int skip_checkpoint_write; + int no_cache; + int tags_ecc_on; + int tags_ecc_overridden; + int lazy_loading_enabled; + int lazy_loading_overridden; + int empty_lost_and_found; + int empty_lost_and_found_overridden; +}; + +#define MAX_OPT_LEN 30 +static int yaffs_parse_options(struct yaffs_options *options, + const char *options_str) +{ + char cur_opt[MAX_OPT_LEN + 1]; + int p; + int error = 0; + + /* Parse through the options which is a comma seperated list */ + + while (options_str && *options_str && !error) { + memset(cur_opt, 0, MAX_OPT_LEN + 1); + p = 0; + + while (*options_str == ',') + options_str++; + + while (*options_str && *options_str != ',') { + if (p < MAX_OPT_LEN) { + cur_opt[p] = *options_str; + p++; + } + options_str++; + } + + if (!strcmp(cur_opt, "inband-tags")) { + options->inband_tags = 1; + } else if (!strcmp(cur_opt, "tags-ecc-off")) { + options->tags_ecc_on = 0; + options->tags_ecc_overridden = 1; + } else if (!strcmp(cur_opt, "tags-ecc-on")) { + options->tags_ecc_on = 1; + options->tags_ecc_overridden = 1; + } else if (!strcmp(cur_opt, "lazy-loading-off")) { + options->lazy_loading_enabled = 0; + options->lazy_loading_overridden = 1; + } else if (!strcmp(cur_opt, "lazy-loading-on")) { + options->lazy_loading_enabled = 1; + options->lazy_loading_overridden = 1; + } else if (!strcmp(cur_opt, "empty-lost-and-found-off")) { + options->empty_lost_and_found = 0; + options->empty_lost_and_found_overridden = 1; + } else if (!strcmp(cur_opt, "empty-lost-and-found-on")) { + options->empty_lost_and_found = 1; + options->empty_lost_and_found_overridden = 1; + } else if (!strcmp(cur_opt, "no-cache")) { + options->no_cache = 1; + } else if (!strcmp(cur_opt, "no-checkpoint-read")) { + options->skip_checkpoint_read = 1; + } else if (!strcmp(cur_opt, "no-checkpoint-write")) { + options->skip_checkpoint_write = 1; + } else if (!strcmp(cur_opt, "no-checkpoint")) { + options->skip_checkpoint_read = 1; + options->skip_checkpoint_write = 1; + } else { + printk(KERN_INFO "yaffs: Bad mount option \"%s\"\n", + cur_opt); + error = 1; + } + } + + return error; +} + +static struct address_space_operations yaffs_file_address_operations = { + .readpage = yaffs_readpage, + .writepage = yaffs_writepage, + .write_begin = yaffs_write_begin, + .write_end = yaffs_write_end, +}; + + + +static const struct inode_operations yaffs_file_inode_operations = { + .setattr = yaffs_setattr, +#ifdef CONFIG_YAFFS_XATTR + .setxattr = yaffs_setxattr, + .getxattr = yaffs_getxattr, + .listxattr = yaffs_listxattr, + .removexattr = yaffs_removexattr, +#endif +}; + +static const struct inode_operations yaffs_symlink_inode_operations = { + .readlink = yaffs_readlink, + .follow_link = yaffs_follow_link, + .put_link = yaffs_put_link, + .setattr = yaffs_setattr, +#ifdef CONFIG_YAFFS_XATTR + .setxattr = yaffs_setxattr, + .getxattr = yaffs_getxattr, + .listxattr = yaffs_listxattr, + .removexattr = yaffs_removexattr, +#endif +}; + +static void yaffs_fill_inode_from_obj(struct inode *inode, + struct yaffs_obj *obj) +{ + if (inode && obj) { + + /* Check mode against the variant type and attempt to repair if broken. */ + u32 mode = obj->yst_mode; + switch (obj->variant_type) { + case YAFFS_OBJECT_TYPE_FILE: + if (!S_ISREG(mode)) { + obj->yst_mode &= ~S_IFMT; + obj->yst_mode |= S_IFREG; + } + + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + if (!S_ISLNK(mode)) { + obj->yst_mode &= ~S_IFMT; + obj->yst_mode |= S_IFLNK; + } + + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + if (!S_ISDIR(mode)) { + obj->yst_mode &= ~S_IFMT; + obj->yst_mode |= S_IFDIR; + } + + break; + case YAFFS_OBJECT_TYPE_UNKNOWN: + case YAFFS_OBJECT_TYPE_HARDLINK: + case YAFFS_OBJECT_TYPE_SPECIAL: + default: + /* TODO? */ + break; + } + + inode->i_flags |= S_NOATIME; + + inode->i_ino = obj->obj_id; + inode->i_mode = obj->yst_mode; + inode->i_uid = obj->yst_uid; + inode->i_gid = obj->yst_gid; + + inode->i_rdev = old_decode_dev(obj->yst_rdev); + + inode->i_atime.tv_sec = (time_t) (obj->yst_atime); + inode->i_atime.tv_nsec = 0; + inode->i_mtime.tv_sec = (time_t) obj->yst_mtime; + inode->i_mtime.tv_nsec = 0; + inode->i_ctime.tv_sec = (time_t) obj->yst_ctime; + inode->i_ctime.tv_nsec = 0; + inode->i_size = yaffs_get_obj_length(obj); + inode->i_blocks = (inode->i_size + 511) >> 9; + + inode->i_nlink = yaffs_get_obj_link_count(obj); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_fill_inode mode %x uid %d gid %d size %d count %d", + inode->i_mode, inode->i_uid, inode->i_gid, + (int)inode->i_size, atomic_read(&inode->i_count)); + + switch (obj->yst_mode & S_IFMT) { + default: /* fifo, device or socket */ + init_special_inode(inode, obj->yst_mode, + old_decode_dev(obj->yst_rdev)); + break; + case S_IFREG: /* file */ + inode->i_op = &yaffs_file_inode_operations; + inode->i_fop = &yaffs_file_operations; + inode->i_mapping->a_ops = + &yaffs_file_address_operations; + break; + case S_IFDIR: /* directory */ + inode->i_op = &yaffs_dir_inode_operations; + inode->i_fop = &yaffs_dir_operations; + break; + case S_IFLNK: /* symlink */ + inode->i_op = &yaffs_symlink_inode_operations; + break; + } + + yaffs_inode_to_obj_lv(inode) = obj; + + obj->my_inode = inode; + + } else { + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_fill_inode invalid parameters"); + } +} + +static void yaffs_put_super(struct super_block *sb) +{ + struct yaffs_dev *dev = yaffs_super_to_dev(sb); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_put_super"); + + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, + "Shutting down yaffs background thread"); + yaffs_bg_stop(dev); + yaffs_trace(YAFFS_TRACE_OS | YAFFS_TRACE_BACKGROUND, + "yaffs background thread shut down"); + + yaffs_gross_lock(dev); + + yaffs_flush_super(sb, 1); + + if (yaffs_dev_to_lc(dev)->put_super_fn) + yaffs_dev_to_lc(dev)->put_super_fn(sb); + + yaffs_deinitialise(dev); + + yaffs_gross_unlock(dev); + mutex_lock(&yaffs_context_lock); + list_del_init(&(yaffs_dev_to_lc(dev)->context_list)); + mutex_unlock(&yaffs_context_lock); + + if (yaffs_dev_to_lc(dev)->spare_buffer) { + kfree(yaffs_dev_to_lc(dev)->spare_buffer); + yaffs_dev_to_lc(dev)->spare_buffer = NULL; + } + + kfree(dev); +} + +static void yaffs_mtd_put_super(struct super_block *sb) +{ + struct mtd_info *mtd = yaffs_dev_to_mtd(yaffs_super_to_dev(sb)); + + if (mtd->sync) + mtd->sync(mtd); + + put_mtd_device(mtd); +} + +static const struct super_operations yaffs_super_ops = { + .statfs = yaffs_statfs, + .put_super = yaffs_put_super, + .evict_inode = yaffs_evict_inode, + .sync_fs = yaffs_sync_fs, + .write_super = yaffs_write_super, +}; + +static struct super_block *yaffs_internal_read_super(int yaffs_version, + struct super_block *sb, + void *data, int silent) +{ + int n_blocks; + struct inode *inode = NULL; + struct dentry *root; + struct yaffs_dev *dev = 0; + char devname_buf[BDEVNAME_SIZE + 1]; + struct mtd_info *mtd; + int err; + char *data_str = (char *)data; + struct yaffs_linux_context *context = NULL; + struct yaffs_param *param; + + int read_only = 0; + + struct yaffs_options options; + + unsigned mount_id; + int found; + struct yaffs_linux_context *context_iterator; + struct list_head *l; + + sb->s_magic = YAFFS_MAGIC; + sb->s_op = &yaffs_super_ops; + sb->s_flags |= MS_NOATIME; + + read_only = ((sb->s_flags & MS_RDONLY) != 0); + + sb->s_export_op = &yaffs_export_ops; + + if (!sb) + printk(KERN_INFO "yaffs: sb is NULL\n"); + else if (!sb->s_dev) + printk(KERN_INFO "yaffs: sb->s_dev is NULL\n"); + else if (!yaffs_devname(sb, devname_buf)) + printk(KERN_INFO "yaffs: devname is NULL\n"); + else + printk(KERN_INFO "yaffs: dev is %d name is \"%s\" %s\n", + sb->s_dev, + yaffs_devname(sb, devname_buf), read_only ? "ro" : "rw"); + + if (!data_str) + data_str = ""; + + printk(KERN_INFO "yaffs: passed flags \"%s\"\n", data_str); + + memset(&options, 0, sizeof(options)); + + if (yaffs_parse_options(&options, data_str)) { + /* Option parsing failed */ + return NULL; + } + + sb->s_blocksize = PAGE_CACHE_SIZE; + sb->s_blocksize_bits = PAGE_CACHE_SHIFT; + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_read_super: Using yaffs%d", yaffs_version); + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_read_super: block size %d", (int)(sb->s_blocksize)); + + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Attempting MTD mount of %u.%u,\"%s\"", + MAJOR(sb->s_dev), MINOR(sb->s_dev), + yaffs_devname(sb, devname_buf)); + + /* Check it's an mtd device..... */ + if (MAJOR(sb->s_dev) != MTD_BLOCK_MAJOR) + return NULL; /* This isn't an mtd device */ + + /* Get the device */ + mtd = get_mtd_device(NULL, MINOR(sb->s_dev)); + if (!mtd) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device #%u doesn't appear to exist", + MINOR(sb->s_dev)); + return NULL; + } + /* Check it's NAND */ + if (mtd->type != MTD_NANDFLASH) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device is not NAND it's type %d", + mtd->type); + return NULL; + } + + yaffs_trace(YAFFS_TRACE_OS, " erase %p", mtd->erase); + yaffs_trace(YAFFS_TRACE_OS, " read %p", mtd->read); + yaffs_trace(YAFFS_TRACE_OS, " write %p", mtd->write); + yaffs_trace(YAFFS_TRACE_OS, " readoob %p", mtd->read_oob); + yaffs_trace(YAFFS_TRACE_OS, " writeoob %p", mtd->write_oob); + yaffs_trace(YAFFS_TRACE_OS, " block_isbad %p", mtd->block_isbad); + yaffs_trace(YAFFS_TRACE_OS, " block_markbad %p", mtd->block_markbad); + yaffs_trace(YAFFS_TRACE_OS, " %s %d", WRITE_SIZE_STR, WRITE_SIZE(mtd)); + yaffs_trace(YAFFS_TRACE_OS, " oobsize %d", mtd->oobsize); + yaffs_trace(YAFFS_TRACE_OS, " erasesize %d", mtd->erasesize); + yaffs_trace(YAFFS_TRACE_OS, " size %lld", mtd->size); + +#ifdef CONFIG_YAFFS_AUTO_YAFFS2 + + if (yaffs_version == 1 && WRITE_SIZE(mtd) >= 2048) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs2"); + yaffs_version = 2; + } + + /* Added NCB 26/5/2006 for completeness */ + if (yaffs_version == 2 && !options.inband_tags + && WRITE_SIZE(mtd) == 512) { + yaffs_trace(YAFFS_TRACE_ALWAYS, "auto selecting yaffs1"); + yaffs_version = 1; + } +#endif + + if (yaffs_version == 2) { + /* Check for version 2 style functions */ + if (!mtd->erase || + !mtd->block_isbad || + !mtd->block_markbad || + !mtd->read || + !mtd->write || !mtd->read_oob || !mtd->write_oob) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not support required functions"); + return NULL; + } + + if ((WRITE_SIZE(mtd) < YAFFS_MIN_YAFFS2_CHUNK_SIZE || + mtd->oobsize < YAFFS_MIN_YAFFS2_SPARE_SIZE) && + !options.inband_tags) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not have the right page sizes"); + return NULL; + } + } else { + /* Check for V1 style functions */ + if (!mtd->erase || + !mtd->read || + !mtd->write || !mtd->read_oob || !mtd->write_oob) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not support required functions"); + return NULL; + } + + if (WRITE_SIZE(mtd) < YAFFS_BYTES_PER_CHUNK || + mtd->oobsize != YAFFS_BYTES_PER_SPARE) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "MTD device does not support have the right page sizes"); + return NULL; + } + } + + /* OK, so if we got here, we have an MTD that's NAND and looks + * like it has the right capabilities + * Set the struct yaffs_dev up for mtd + */ + + if (!read_only && !(mtd->flags & MTD_WRITEABLE)) { + read_only = 1; + printk(KERN_INFO + "yaffs: mtd is read only, setting superblock read only"); + sb->s_flags |= MS_RDONLY; + } + + dev = kmalloc(sizeof(struct yaffs_dev), GFP_KERNEL); + context = kmalloc(sizeof(struct yaffs_linux_context), GFP_KERNEL); + + if (!dev || !context) { + if (dev) + kfree(dev); + if (context) + kfree(context); + dev = NULL; + context = NULL; + } + + if (!dev) { + /* Deep shit could not allocate device structure */ + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs_read_super failed trying to allocate yaffs_dev"); + return NULL; + } + memset(dev, 0, sizeof(struct yaffs_dev)); + param = &(dev->param); + + memset(context, 0, sizeof(struct yaffs_linux_context)); + dev->os_context = context; + INIT_LIST_HEAD(&(context->context_list)); + context->dev = dev; + context->super = sb; + + dev->read_only = read_only; + + sb->s_fs_info = dev; + + dev->driver_context = mtd; + param->name = mtd->name; + + /* Set up the memory size parameters.... */ + + n_blocks = + YCALCBLOCKS(mtd->size, + (YAFFS_CHUNKS_PER_BLOCK * YAFFS_BYTES_PER_CHUNK)); + + param->start_block = 0; + param->end_block = n_blocks - 1; + param->chunks_per_block = YAFFS_CHUNKS_PER_BLOCK; + param->total_bytes_per_chunk = YAFFS_BYTES_PER_CHUNK; + param->n_reserved_blocks = 5; + param->n_caches = (options.no_cache) ? 0 : 10; + param->inband_tags = options.inband_tags; + +#ifdef CONFIG_YAFFS_DISABLE_LAZY_LOAD + param->disable_lazy_load = 1; +#endif +#ifdef CONFIG_YAFFS_XATTR + param->enable_xattr = 1; +#endif + if (options.lazy_loading_overridden) + param->disable_lazy_load = !options.lazy_loading_enabled; + +#ifdef CONFIG_YAFFS_DISABLE_TAGS_ECC + param->no_tags_ecc = 1; +#endif + +#ifdef CONFIG_YAFFS_DISABLE_BACKGROUND +#else + param->defered_dir_update = 1; +#endif + + if (options.tags_ecc_overridden) + param->no_tags_ecc = !options.tags_ecc_on; + +#ifdef CONFIG_YAFFS_EMPTY_LOST_AND_FOUND + param->empty_lost_n_found = 1; +#endif + +#ifdef CONFIG_YAFFS_DISABLE_BLOCK_REFRESHING + param->refresh_period = 0; +#else + param->refresh_period = 500; +#endif + +#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED + param->always_check_erased = 1; +#endif + + if (options.empty_lost_and_found_overridden) + param->empty_lost_n_found = options.empty_lost_and_found; + + /* ... and the functions. */ + if (yaffs_version == 2) { + param->write_chunk_tags_fn = nandmtd2_write_chunk_tags; + param->read_chunk_tags_fn = nandmtd2_read_chunk_tags; + param->bad_block_fn = nandmtd2_mark_block_bad; + param->query_block_fn = nandmtd2_query_block; + yaffs_dev_to_lc(dev)->spare_buffer = + kmalloc(mtd->oobsize, GFP_NOFS); + param->is_yaffs2 = 1; + param->total_bytes_per_chunk = mtd->writesize; + param->chunks_per_block = mtd->erasesize / mtd->writesize; + n_blocks = YCALCBLOCKS(mtd->size, mtd->erasesize); + + param->start_block = 0; + param->end_block = n_blocks - 1; + } else { + /* use the MTD interface in yaffs_mtdif1.c */ + param->write_chunk_tags_fn = nandmtd1_write_chunk_tags; + param->read_chunk_tags_fn = nandmtd1_read_chunk_tags; + param->bad_block_fn = nandmtd1_mark_block_bad; + param->query_block_fn = nandmtd1_query_block; + param->is_yaffs2 = 0; + } + /* ... and common functions */ + param->erase_fn = nandmtd_erase_block; + param->initialise_flash_fn = nandmtd_initialise; + + yaffs_dev_to_lc(dev)->put_super_fn = yaffs_mtd_put_super; + + param->sb_dirty_fn = yaffs_touch_super; + param->gc_control = yaffs_gc_control_callback; + + yaffs_dev_to_lc(dev)->super = sb; + +#ifndef CONFIG_YAFFS_DOES_ECC + param->use_nand_ecc = 1; +#endif + + param->skip_checkpt_rd = options.skip_checkpoint_read; + param->skip_checkpt_wr = options.skip_checkpoint_write; + + mutex_lock(&yaffs_context_lock); + /* Get a mount id */ + found = 0; + for (mount_id = 0; !found; mount_id++) { + found = 1; + list_for_each(l, &yaffs_context_list) { + context_iterator = + list_entry(l, struct yaffs_linux_context, + context_list); + if (context_iterator->mount_id == mount_id) + found = 0; + } + } + context->mount_id = mount_id; + + list_add_tail(&(yaffs_dev_to_lc(dev)->context_list), + &yaffs_context_list); + mutex_unlock(&yaffs_context_lock); + + /* Directory search handling... */ + INIT_LIST_HEAD(&(yaffs_dev_to_lc(dev)->search_contexts)); + param->remove_obj_fn = yaffs_remove_obj_callback; + + mutex_init(&(yaffs_dev_to_lc(dev)->gross_lock)); + + yaffs_gross_lock(dev); + + err = yaffs_guts_initialise(dev); + + yaffs_trace(YAFFS_TRACE_OS, + "yaffs_read_super: guts initialised %s", + (err == YAFFS_OK) ? "OK" : "FAILED"); + + if (err == YAFFS_OK) + yaffs_bg_start(dev); + + if (!context->bg_thread) + param->defered_dir_update = 0; + + /* Release lock before yaffs_get_inode() */ + yaffs_gross_unlock(dev); + + /* Create root inode */ + if (err == YAFFS_OK) + inode = yaffs_get_inode(sb, S_IFDIR | 0755, 0, yaffs_root(dev)); + + if (!inode) + return NULL; + + inode->i_op = &yaffs_dir_inode_operations; + inode->i_fop = &yaffs_dir_operations; + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: got root inode"); + + root = d_alloc_root(inode); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: d_alloc_root done"); + + if (!root) { + iput(inode); + return NULL; + } + sb->s_root = root; + sb->s_dirt = !dev->is_checkpointed; + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs_read_super: is_checkpointed %d", + dev->is_checkpointed); + + yaffs_trace(YAFFS_TRACE_OS, "yaffs_read_super: done"); + return sb; +} + +static int yaffs_internal_read_super_mtd(struct super_block *sb, void *data, + int silent) +{ + return yaffs_internal_read_super(1, sb, data, silent) ? 0 : -EINVAL; +} + +static int yaffs_read_super(struct file_system_type *fs, + int flags, const char *dev_name, + void *data, struct vfsmount *mnt) +{ + + return get_sb_bdev(fs, flags, dev_name, data, + yaffs_internal_read_super_mtd, mnt); +} + +static struct file_system_type yaffs_fs_type = { + .owner = THIS_MODULE, + .name = "yaffs", + .get_sb = yaffs_read_super, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; + +#ifdef CONFIG_YAFFS_YAFFS2 + +static int yaffs2_internal_read_super_mtd(struct super_block *sb, void *data, + int silent) +{ + return yaffs_internal_read_super(2, sb, data, silent) ? 0 : -EINVAL; +} + +static int yaffs2_read_super(struct file_system_type *fs, + int flags, const char *dev_name, void *data, + struct vfsmount *mnt) +{ + return get_sb_bdev(fs, flags, dev_name, data, + yaffs2_internal_read_super_mtd, mnt); +} + +static struct file_system_type yaffs2_fs_type = { + .owner = THIS_MODULE, + .name = "yaffs2", + .get_sb = yaffs2_read_super, + .kill_sb = kill_block_super, + .fs_flags = FS_REQUIRES_DEV, +}; +#endif /* CONFIG_YAFFS_YAFFS2 */ + +static struct proc_dir_entry *my_proc_entry; + +static char *yaffs_dump_dev_part0(char *buf, struct yaffs_dev *dev) +{ + struct yaffs_param *param = &dev->param; + buf += sprintf(buf, "start_block........... %d\n", param->start_block); + buf += sprintf(buf, "end_block............. %d\n", param->end_block); + buf += sprintf(buf, "total_bytes_per_chunk. %d\n", + param->total_bytes_per_chunk); + buf += sprintf(buf, "use_nand_ecc.......... %d\n", + param->use_nand_ecc); + buf += sprintf(buf, "no_tags_ecc........... %d\n", param->no_tags_ecc); + buf += sprintf(buf, "is_yaffs2............. %d\n", param->is_yaffs2); + buf += sprintf(buf, "inband_tags........... %d\n", param->inband_tags); + buf += sprintf(buf, "empty_lost_n_found.... %d\n", + param->empty_lost_n_found); + buf += sprintf(buf, "disable_lazy_load..... %d\n", + param->disable_lazy_load); + buf += sprintf(buf, "refresh_period........ %d\n", + param->refresh_period); + buf += sprintf(buf, "n_caches.............. %d\n", param->n_caches); + buf += sprintf(buf, "n_reserved_blocks..... %d\n", + param->n_reserved_blocks); + buf += sprintf(buf, "always_check_erased... %d\n", + param->always_check_erased); + + return buf; +} + +static char *yaffs_dump_dev_part1(char *buf, struct yaffs_dev *dev) +{ + buf += + sprintf(buf, "data_bytes_per_chunk.. %d\n", + dev->data_bytes_per_chunk); + buf += sprintf(buf, "chunk_grp_bits........ %d\n", dev->chunk_grp_bits); + buf += sprintf(buf, "chunk_grp_size........ %d\n", dev->chunk_grp_size); + buf += + sprintf(buf, "n_erased_blocks....... %d\n", dev->n_erased_blocks); + buf += + sprintf(buf, "blocks_in_checkpt..... %d\n", dev->blocks_in_checkpt); + buf += sprintf(buf, "\n"); + buf += sprintf(buf, "n_tnodes.............. %d\n", dev->n_tnodes); + buf += sprintf(buf, "n_obj................. %d\n", dev->n_obj); + buf += sprintf(buf, "n_free_chunks......... %d\n", dev->n_free_chunks); + buf += sprintf(buf, "\n"); + buf += sprintf(buf, "n_page_writes......... %u\n", dev->n_page_writes); + buf += sprintf(buf, "n_page_reads.......... %u\n", dev->n_page_reads); + buf += sprintf(buf, "n_erasures............ %u\n", dev->n_erasures); + buf += sprintf(buf, "n_gc_copies........... %u\n", dev->n_gc_copies); + buf += sprintf(buf, "all_gcs............... %u\n", dev->all_gcs); + buf += + sprintf(buf, "passive_gc_count...... %u\n", dev->passive_gc_count); + buf += + sprintf(buf, "oldest_dirty_gc_count. %u\n", + dev->oldest_dirty_gc_count); + buf += sprintf(buf, "n_gc_blocks........... %u\n", dev->n_gc_blocks); + buf += sprintf(buf, "bg_gcs................ %u\n", dev->bg_gcs); + buf += + sprintf(buf, "n_retired_writes...... %u\n", dev->n_retired_writes); + buf += + sprintf(buf, "n_retired_blocks...... %u\n", dev->n_retired_blocks); + buf += sprintf(buf, "n_ecc_fixed........... %u\n", dev->n_ecc_fixed); + buf += sprintf(buf, "n_ecc_unfixed......... %u\n", dev->n_ecc_unfixed); + buf += + sprintf(buf, "n_tags_ecc_fixed...... %u\n", dev->n_tags_ecc_fixed); + buf += + sprintf(buf, "n_tags_ecc_unfixed.... %u\n", + dev->n_tags_ecc_unfixed); + buf += sprintf(buf, "cache_hits............ %u\n", dev->cache_hits); + buf += + sprintf(buf, "n_deleted_files....... %u\n", dev->n_deleted_files); + buf += + sprintf(buf, "n_unlinked_files...... %u\n", dev->n_unlinked_files); + buf += sprintf(buf, "refresh_count......... %u\n", dev->refresh_count); + buf += sprintf(buf, "n_bg_deletions........ %u\n", dev->n_bg_deletions); + + return buf; +} + +static int yaffs_proc_read(char *page, + char **start, + off_t offset, int count, int *eof, void *data) +{ + struct list_head *item; + char *buf = page; + int step = offset; + int n = 0; + + /* Get proc_file_read() to step 'offset' by one on each sucessive call. + * We use 'offset' (*ppos) to indicate where we are in dev_list. + * This also assumes the user has posted a read buffer large + * enough to hold the complete output; but that's life in /proc. + */ + + *(int *)start = 1; + + /* Print header first */ + if (step == 0) + buf += sprintf(buf, "YAFFS built:" __DATE__ " " __TIME__ "\n"); + else if (step == 1) + buf += sprintf(buf, "\n"); + else { + step -= 2; + + mutex_lock(&yaffs_context_lock); + + /* Locate and print the Nth entry. Order N-squared but N is small. */ + list_for_each(item, &yaffs_context_list) { + struct yaffs_linux_context *dc = + list_entry(item, struct yaffs_linux_context, + context_list); + struct yaffs_dev *dev = dc->dev; + + if (n < (step & ~1)) { + n += 2; + continue; + } + if ((step & 1) == 0) { + buf += + sprintf(buf, "\nDevice %d \"%s\"\n", n, + dev->param.name); + buf = yaffs_dump_dev_part0(buf, dev); + } else { + buf = yaffs_dump_dev_part1(buf, dev); + } + + break; + } + mutex_unlock(&yaffs_context_lock); + } + + return buf - page < count ? buf - page : count; +} + + +/** + * Set the verbosity of the warnings and error messages. + * + * Note that the names can only be a..z or _ with the current code. + */ + +static struct { + char *mask_name; + unsigned mask_bitfield; +} mask_flags[] = { + {"allocate", YAFFS_TRACE_ALLOCATE}, + {"always", YAFFS_TRACE_ALWAYS}, + {"background", YAFFS_TRACE_BACKGROUND}, + {"bad_blocks", YAFFS_TRACE_BAD_BLOCKS}, + {"buffers", YAFFS_TRACE_BUFFERS}, + {"bug", YAFFS_TRACE_BUG}, + {"checkpt", YAFFS_TRACE_CHECKPOINT}, + {"deletion", YAFFS_TRACE_DELETION}, + {"erase", YAFFS_TRACE_ERASE}, + {"error", YAFFS_TRACE_ERROR}, + {"gc_detail", YAFFS_TRACE_GC_DETAIL}, + {"gc", YAFFS_TRACE_GC}, + {"lock", YAFFS_TRACE_LOCK}, + {"mtd", YAFFS_TRACE_MTD}, + {"nandaccess", YAFFS_TRACE_NANDACCESS}, + {"os", YAFFS_TRACE_OS}, + {"scan_debug", YAFFS_TRACE_SCAN_DEBUG}, + {"scan", YAFFS_TRACE_SCAN}, + {"mount", YAFFS_TRACE_MOUNT}, + {"tracing", YAFFS_TRACE_TRACING}, + {"sync", YAFFS_TRACE_SYNC}, + {"write", YAFFS_TRACE_WRITE}, + {"verify", YAFFS_TRACE_VERIFY}, + {"verify_nand", YAFFS_TRACE_VERIFY_NAND}, + {"verify_full", YAFFS_TRACE_VERIFY_FULL}, + {"verify_all", YAFFS_TRACE_VERIFY_ALL}, + {"all", 0xffffffff}, + {"none", 0}, + {NULL, 0}, +}; + +#define MAX_MASK_NAME_LENGTH 40 +static int yaffs_proc_write_trace_options(struct file *file, const char *buf, + unsigned long count, void *data) +{ + unsigned rg = 0, mask_bitfield; + char *end; + char *mask_name; + const char *x; + char substring[MAX_MASK_NAME_LENGTH + 1]; + int i; + int done = 0; + int add, len = 0; + int pos = 0; + + rg = yaffs_trace_mask; + + while (!done && (pos < count)) { + done = 1; + while ((pos < count) && isspace(buf[pos])) + pos++; + + switch (buf[pos]) { + case '+': + case '-': + case '=': + add = buf[pos]; + pos++; + break; + + default: + add = ' '; + break; + } + mask_name = NULL; + + mask_bitfield = simple_strtoul(buf + pos, &end, 0); + + if (end > buf + pos) { + mask_name = "numeral"; + len = end - (buf + pos); + pos += len; + done = 0; + } else { + for (x = buf + pos, i = 0; + (*x == '_' || (*x >= 'a' && *x <= 'z')) && + i < MAX_MASK_NAME_LENGTH; x++, i++, pos++) + substring[i] = *x; + substring[i] = '\0'; + + for (i = 0; mask_flags[i].mask_name != NULL; i++) { + if (strcmp(substring, mask_flags[i].mask_name) + == 0) { + mask_name = mask_flags[i].mask_name; + mask_bitfield = + mask_flags[i].mask_bitfield; + done = 0; + break; + } + } + } + + if (mask_name != NULL) { + done = 0; + switch (add) { + case '-': + rg &= ~mask_bitfield; + break; + case '+': + rg |= mask_bitfield; + break; + case '=': + rg = mask_bitfield; + break; + default: + rg |= mask_bitfield; + break; + } + } + } + + yaffs_trace_mask = rg | YAFFS_TRACE_ALWAYS; + + printk(KERN_DEBUG "new trace = 0x%08X\n", yaffs_trace_mask); + + if (rg & YAFFS_TRACE_ALWAYS) { + for (i = 0; mask_flags[i].mask_name != NULL; i++) { + char flag; + flag = ((rg & mask_flags[i].mask_bitfield) == + mask_flags[i].mask_bitfield) ? '+' : '-'; + printk(KERN_DEBUG "%c%s\n", flag, + mask_flags[i].mask_name); + } + } + + return count; +} + +static int yaffs_proc_write(struct file *file, const char *buf, + unsigned long count, void *data) +{ + return yaffs_proc_write_trace_options(file, buf, count, data); +} + +/* Stuff to handle installation of file systems */ +struct file_system_to_install { + struct file_system_type *fst; + int installed; +}; + +static struct file_system_to_install fs_to_install[] = { + {&yaffs_fs_type, 0}, + {&yaffs2_fs_type, 0}, + {NULL, 0} +}; + +static int __init init_yaffs_fs(void) +{ + int error = 0; + struct file_system_to_install *fsinst; + + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs built " __DATE__ " " __TIME__ " Installing."); + +#ifdef CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED + yaffs_trace(YAFFS_TRACE_ALWAYS, + "\n\nYAFFS-WARNING CONFIG_YAFFS_ALWAYS_CHECK_CHUNK_ERASED selected.\n\n\n"); +#endif + + mutex_init(&yaffs_context_lock); + + /* Install the proc_fs entries */ + my_proc_entry = create_proc_entry("yaffs", + S_IRUGO | S_IFREG, YPROC_ROOT); + + if (my_proc_entry) { + my_proc_entry->write_proc = yaffs_proc_write; + my_proc_entry->read_proc = yaffs_proc_read; + my_proc_entry->data = NULL; + } else { + return -ENOMEM; + } + + + /* Now add the file system entries */ + + fsinst = fs_to_install; + + while (fsinst->fst && !error) { + error = register_filesystem(fsinst->fst); + if (!error) + fsinst->installed = 1; + fsinst++; + } + + /* Any errors? uninstall */ + if (error) { + fsinst = fs_to_install; + + while (fsinst->fst) { + if (fsinst->installed) { + unregister_filesystem(fsinst->fst); + fsinst->installed = 0; + } + fsinst++; + } + } + + return error; +} + +static void __exit exit_yaffs_fs(void) +{ + + struct file_system_to_install *fsinst; + + yaffs_trace(YAFFS_TRACE_ALWAYS, + "yaffs built " __DATE__ " " __TIME__ " removing."); + + remove_proc_entry("yaffs", YPROC_ROOT); + + fsinst = fs_to_install; + + while (fsinst->fst) { + if (fsinst->installed) { + unregister_filesystem(fsinst->fst); + fsinst->installed = 0; + } + fsinst++; + } +} + +module_init(init_yaffs_fs) + module_exit(exit_yaffs_fs) + + MODULE_DESCRIPTION("YAFFS2 - a NAND specific flash file system"); +MODULE_AUTHOR("Charles Manning, Aleph One Ltd., 2002-2010"); +MODULE_LICENSE("GPL"); diff --git a/fs/yaffs2/yaffs_yaffs1.c b/fs/yaffs2/yaffs_yaffs1.c new file mode 100644 index 00000000000..9eb60308254 --- /dev/null +++ b/fs/yaffs2/yaffs_yaffs1.c @@ -0,0 +1,433 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_yaffs1.h" +#include "yportenv.h" +#include "yaffs_trace.h" +#include "yaffs_bitmap.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_nand.h" +#include "yaffs_attribs.h" + +int yaffs1_scan(struct yaffs_dev *dev) +{ + struct yaffs_ext_tags tags; + int blk; + int result; + + int chunk; + int c; + int deleted; + enum yaffs_block_state state; + struct yaffs_obj *hard_list = NULL; + struct yaffs_block_info *bi; + u32 seq_number; + struct yaffs_obj_hdr *oh; + struct yaffs_obj *in; + struct yaffs_obj *parent; + + int alloc_failed = 0; + + struct yaffs_shadow_fixer *shadow_fixers = NULL; + + u8 *chunk_data; + + yaffs_trace(YAFFS_TRACE_SCAN, + "yaffs1_scan starts intstartblk %d intendblk %d...", + dev->internal_start_block, dev->internal_end_block); + + chunk_data = yaffs_get_temp_buffer(dev, __LINE__); + + dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; + + /* Scan all the blocks to determine their state */ + bi = dev->block_info; + for (blk = dev->internal_start_block; blk <= dev->internal_end_block; + blk++) { + yaffs_clear_chunk_bits(dev, blk); + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + + yaffs_query_init_block_state(dev, blk, &state, &seq_number); + + bi->block_state = state; + bi->seq_number = seq_number; + + if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) + bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; + + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, + "Block scanning block %d state %d seq %d", + blk, state, seq_number); + + if (state == YAFFS_BLOCK_STATE_DEAD) { + yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, + "block %d is bad", blk); + } else if (state == YAFFS_BLOCK_STATE_EMPTY) { + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); + dev->n_erased_blocks++; + dev->n_free_chunks += dev->param.chunks_per_block; + } + bi++; + } + + /* For each block.... */ + for (blk = dev->internal_start_block; + !alloc_failed && blk <= dev->internal_end_block; blk++) { + + cond_resched(); + + bi = yaffs_get_block_info(dev, blk); + state = bi->block_state; + + deleted = 0; + + /* For each chunk in each block that needs scanning.... */ + for (c = 0; !alloc_failed && c < dev->param.chunks_per_block && + state == YAFFS_BLOCK_STATE_NEEDS_SCANNING; c++) { + /* Read the tags and decide what to do */ + chunk = blk * dev->param.chunks_per_block + c; + + result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, + &tags); + + /* Let's have a good look at this chunk... */ + + if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED + || tags.is_deleted) { + /* YAFFS1 only... + * A deleted chunk + */ + deleted++; + dev->n_free_chunks++; + /*T((" %d %d deleted\n",blk,c)); */ + } else if (!tags.chunk_used) { + /* An unassigned chunk in the block + * This means that either the block is empty or + * this is the one being allocated from + */ + + if (c == 0) { + /* We're looking at the first chunk in the block so the block is unused */ + state = YAFFS_BLOCK_STATE_EMPTY; + dev->n_erased_blocks++; + } else { + /* this is the block being allocated from */ + yaffs_trace(YAFFS_TRACE_SCAN, + " Allocating from %d %d", + blk, c); + state = YAFFS_BLOCK_STATE_ALLOCATING; + dev->alloc_block = blk; + dev->alloc_page = c; + dev->alloc_block_finder = blk; + /* Set block finder here to encourage the allocator to go forth from here. */ + + } + + dev->n_free_chunks += + (dev->param.chunks_per_block - c); + } else if (tags.chunk_id > 0) { + /* chunk_id > 0 so it is a data chunk... */ + unsigned int endpos; + + yaffs_set_chunk_bit(dev, blk, c); + bi->pages_in_use++; + + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, + YAFFS_OBJECT_TYPE_FILE); + /* PutChunkIntoFile checks for a clash (two data chunks with + * the same chunk_id). + */ + + if (!in) + alloc_failed = 1; + + if (in) { + if (!yaffs_put_chunk_in_file + (in, tags.chunk_id, chunk, 1)) + alloc_failed = 1; + } + + endpos = + (tags.chunk_id - + 1) * dev->data_bytes_per_chunk + + tags.n_bytes; + if (in + && in->variant_type == + YAFFS_OBJECT_TYPE_FILE + && in->variant.file_variant.scanned_size < + endpos) { + in->variant.file_variant.scanned_size = + endpos; + if (!dev->param.use_header_file_size) { + in->variant. + file_variant.file_size = + in->variant. + file_variant.scanned_size; + } + + } + /* T((" %d %d data %d %d\n",blk,c,tags.obj_id,tags.chunk_id)); */ + } else { + /* chunk_id == 0, so it is an ObjectHeader. + * Thus, we read in the object header and make the object + */ + yaffs_set_chunk_bit(dev, blk, c); + bi->pages_in_use++; + + result = yaffs_rd_chunk_tags_nand(dev, chunk, + chunk_data, + NULL); + + oh = (struct yaffs_obj_hdr *)chunk_data; + + in = yaffs_find_by_number(dev, tags.obj_id); + if (in && in->variant_type != oh->type) { + /* This should not happen, but somehow + * Wev'e ended up with an obj_id that has been reused but not yet + * deleted, and worse still it has changed type. Delete the old object. + */ + + yaffs_del_obj(in); + + in = 0; + } + + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, + oh->type); + + if (!in) + alloc_failed = 1; + + if (in && oh->shadows_obj > 0) { + + struct yaffs_shadow_fixer *fixer; + fixer = + kmalloc(sizeof + (struct yaffs_shadow_fixer), + GFP_NOFS); + if (fixer) { + fixer->next = shadow_fixers; + shadow_fixers = fixer; + fixer->obj_id = tags.obj_id; + fixer->shadowed_id = + oh->shadows_obj; + yaffs_trace(YAFFS_TRACE_SCAN, + " Shadow fixer: %d shadows %d", + fixer->obj_id, + fixer->shadowed_id); + + } + + } + + if (in && in->valid) { + /* We have already filled this one. We have a duplicate and need to resolve it. */ + + unsigned existing_serial = in->serial; + unsigned new_serial = + tags.serial_number; + + if (((existing_serial + 1) & 3) == + new_serial) { + /* Use new one - destroy the exisiting one */ + yaffs_chunk_del(dev, + in->hdr_chunk, + 1, __LINE__); + in->valid = 0; + } else { + /* Use existing - destroy this one. */ + yaffs_chunk_del(dev, chunk, 1, + __LINE__); + } + } + + if (in && !in->valid && + (tags.obj_id == YAFFS_OBJECTID_ROOT || + tags.obj_id == + YAFFS_OBJECTID_LOSTNFOUND)) { + /* We only load some info, don't fiddle with directory structure */ + in->valid = 1; + in->variant_type = oh->type; + + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + in->hdr_chunk = chunk; + in->serial = tags.serial_number; + + } else if (in && !in->valid) { + /* we need to load this info */ + + in->valid = 1; + in->variant_type = oh->type; + + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + in->hdr_chunk = chunk; + in->serial = tags.serial_number; + + yaffs_set_obj_name_from_oh(in, oh); + in->dirty = 0; + + /* directory stuff... + * hook up to parent + */ + + parent = + yaffs_find_or_create_by_number + (dev, oh->parent_obj_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + if (!parent) + alloc_failed = 1; + if (parent && parent->variant_type == + YAFFS_OBJECT_TYPE_UNKNOWN) { + /* Set up as a directory */ + parent->variant_type = + YAFFS_OBJECT_TYPE_DIRECTORY; + INIT_LIST_HEAD(&parent-> + variant.dir_variant.children); + } else if (!parent + || parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + /* Hoosterman, another problem.... + * We're trying to use a non-directory as a directory + */ + + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." + ); + parent = dev->lost_n_found; + } + + yaffs_add_obj_to_dir(parent, in); + + if (0 && (parent == dev->del_dir || + parent == + dev->unlinked_dir)) { + in->deleted = 1; /* If it is unlinked at start up then it wants deleting */ + dev->n_deleted_files++; + } + /* Note re hardlinks. + * Since we might scan a hardlink before its equivalent object is scanned + * we put them all in a list. + * After scanning is complete, we should have all the objects, so we run through this + * list and fix up all the chains. + */ + + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Todo got a problem */ + break; + case YAFFS_OBJECT_TYPE_FILE: + if (dev->param. + use_header_file_size) + + in->variant. + file_variant.file_size + = oh->file_size; + + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + in->variant. + hardlink_variant.equiv_id = + oh->equiv_id; + in->hard_links.next = + (struct list_head *) + hard_list; + hard_list = in; + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + in->variant.symlink_variant. + alias = + yaffs_clone_str(oh->alias); + if (!in->variant. + symlink_variant.alias) + alloc_failed = 1; + break; + } + + } + } + } + + if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { + /* If we got this far while scanning, then the block is fully allocated. */ + state = YAFFS_BLOCK_STATE_FULL; + } + + if (state == YAFFS_BLOCK_STATE_ALLOCATING) { + /* If the block was partially allocated then treat it as fully allocated. */ + state = YAFFS_BLOCK_STATE_FULL; + dev->alloc_block = -1; + } + + bi->block_state = state; + + /* Now let's see if it was dirty */ + if (bi->pages_in_use == 0 && + !bi->has_shrink_hdr && + bi->block_state == YAFFS_BLOCK_STATE_FULL) { + yaffs_block_became_dirty(dev, blk); + } + + } + + /* Ok, we've done all the scanning. + * Fix up the hard link chains. + * We should now have scanned all the objects, now it's time to add these + * hardlinks. + */ + + yaffs_link_fixup(dev, hard_list); + + /* Fix up any shadowed objects */ + { + struct yaffs_shadow_fixer *fixer; + struct yaffs_obj *obj; + + while (shadow_fixers) { + fixer = shadow_fixers; + shadow_fixers = fixer->next; + /* Complete the rename transaction by deleting the shadowed object + * then setting the object header to unshadowed. + */ + obj = yaffs_find_by_number(dev, fixer->shadowed_id); + if (obj) + yaffs_del_obj(obj); + + obj = yaffs_find_by_number(dev, fixer->obj_id); + + if (obj) + yaffs_update_oh(obj, NULL, 1, 0, 0, NULL); + + kfree(fixer); + } + } + + yaffs_release_temp_buffer(dev, chunk_data, __LINE__); + + if (alloc_failed) + return YAFFS_FAIL; + + yaffs_trace(YAFFS_TRACE_SCAN, "yaffs1_scan ends"); + + return YAFFS_OK; +} diff --git a/fs/yaffs2/yaffsinterface.h b/fs/yaffs2/yaffs_yaffs1.h index ca36cfc427a..db23e04973b 100644 --- a/fs/yaffs2/yaffsinterface.h +++ b/fs/yaffs2/yaffs_yaffs1.h @@ -13,9 +13,10 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ -#ifndef __YAFFSINTERFACE_H__ -#define __YAFFSINTERFACE_H__ +#ifndef __YAFFS_YAFFS1_H__ +#define __YAFFS_YAFFS1_H__ -int yaffs_Initialise(unsigned nBlocks); +#include "yaffs_guts.h" +int yaffs1_scan(struct yaffs_dev *dev); #endif diff --git a/fs/yaffs2/yaffs_yaffs2.c b/fs/yaffs2/yaffs_yaffs2.c new file mode 100644 index 00000000000..33397af7003 --- /dev/null +++ b/fs/yaffs2/yaffs_yaffs2.c @@ -0,0 +1,1598 @@ +/* + * YAFFS: Yet Another Flash File System. A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include "yaffs_guts.h" +#include "yaffs_trace.h" +#include "yaffs_yaffs2.h" +#include "yaffs_checkptrw.h" +#include "yaffs_bitmap.h" +#include "yaffs_nand.h" +#include "yaffs_getblockinfo.h" +#include "yaffs_verify.h" +#include "yaffs_attribs.h" + +/* + * Checkpoints are really no benefit on very small partitions. + * + * To save space on small partitions don't bother with checkpoints unless + * the partition is at least this big. + */ +#define YAFFS_CHECKPOINT_MIN_BLOCKS 60 + +#define YAFFS_SMALL_HOLE_THRESHOLD 4 + +/* + * Oldest Dirty Sequence Number handling. + */ + +/* yaffs_calc_oldest_dirty_seq() + * yaffs2_find_oldest_dirty_seq() + * Calculate the oldest dirty sequence number if we don't know it. + */ +void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev) +{ + int i; + unsigned seq; + unsigned block_no = 0; + struct yaffs_block_info *b; + + if (!dev->param.is_yaffs2) + return; + + /* Find the oldest dirty sequence number. */ + seq = dev->seq_number + 1; + b = dev->block_info; + for (i = dev->internal_start_block; i <= dev->internal_end_block; i++) { + if (b->block_state == YAFFS_BLOCK_STATE_FULL && + (b->pages_in_use - b->soft_del_pages) < + dev->param.chunks_per_block && b->seq_number < seq) { + seq = b->seq_number; + block_no = i; + } + b++; + } + + if (block_no) { + dev->oldest_dirty_seq = seq; + dev->oldest_dirty_block = block_no; + } + +} + +void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev) +{ + if (!dev->param.is_yaffs2) + return; + + if (!dev->oldest_dirty_seq) + yaffs_calc_oldest_dirty_seq(dev); +} + +/* + * yaffs_clear_oldest_dirty_seq() + * Called when a block is erased or marked bad. (ie. when its seq_number + * becomes invalid). If the value matches the oldest then we clear + * dev->oldest_dirty_seq to force its recomputation. + */ +void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, + struct yaffs_block_info *bi) +{ + + if (!dev->param.is_yaffs2) + return; + + if (!bi || bi->seq_number == dev->oldest_dirty_seq) { + dev->oldest_dirty_seq = 0; + dev->oldest_dirty_block = 0; + } +} + +/* + * yaffs2_update_oldest_dirty_seq() + * Update the oldest dirty sequence number whenever we dirty a block. + * Only do this if the oldest_dirty_seq is actually being tracked. + */ +void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, + struct yaffs_block_info *bi) +{ + if (!dev->param.is_yaffs2) + return; + + if (dev->oldest_dirty_seq) { + if (dev->oldest_dirty_seq > bi->seq_number) { + dev->oldest_dirty_seq = bi->seq_number; + dev->oldest_dirty_block = block_no; + } + } +} + +int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi) +{ + + if (!dev->param.is_yaffs2) + return 1; /* disqualification only applies to yaffs2. */ + + if (!bi->has_shrink_hdr) + return 1; /* can gc */ + + yaffs2_find_oldest_dirty_seq(dev); + + /* Can't do gc of this block if there are any blocks older than this one that have + * discarded pages. + */ + return (bi->seq_number <= dev->oldest_dirty_seq); +} + +/* + * yaffs2_find_refresh_block() + * periodically finds the oldest full block by sequence number for refreshing. + * Only for yaffs2. + */ +u32 yaffs2_find_refresh_block(struct yaffs_dev * dev) +{ + u32 b; + + u32 oldest = 0; + u32 oldest_seq = 0; + + struct yaffs_block_info *bi; + + if (!dev->param.is_yaffs2) + return oldest; + + /* + * If refresh period < 10 then refreshing is disabled. + */ + if (dev->param.refresh_period < 10) + return oldest; + + /* + * Fix broken values. + */ + if (dev->refresh_skip > dev->param.refresh_period) + dev->refresh_skip = dev->param.refresh_period; + + if (dev->refresh_skip > 0) + return oldest; + + /* + * Refresh skip is now zero. + * We'll do a refresh this time around.... + * Update the refresh skip and find the oldest block. + */ + dev->refresh_skip = dev->param.refresh_period; + dev->refresh_count++; + bi = dev->block_info; + for (b = dev->internal_start_block; b <= dev->internal_end_block; b++) { + + if (bi->block_state == YAFFS_BLOCK_STATE_FULL) { + + if (oldest < 1 || bi->seq_number < oldest_seq) { + oldest = b; + oldest_seq = bi->seq_number; + } + } + bi++; + } + + if (oldest > 0) { + yaffs_trace(YAFFS_TRACE_GC, + "GC refresh count %d selected block %d with seq_number %d", + dev->refresh_count, oldest, oldest_seq); + } + + return oldest; +} + +int yaffs2_checkpt_required(struct yaffs_dev *dev) +{ + int nblocks; + + if (!dev->param.is_yaffs2) + return 0; + + nblocks = dev->internal_end_block - dev->internal_start_block + 1; + + return !dev->param.skip_checkpt_wr && + !dev->read_only && (nblocks >= YAFFS_CHECKPOINT_MIN_BLOCKS); +} + +int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev) +{ + int retval; + + if (!dev->param.is_yaffs2) + return 0; + + if (!dev->checkpoint_blocks_required && yaffs2_checkpt_required(dev)) { + /* Not a valid value so recalculate */ + int n_bytes = 0; + int n_blocks; + int dev_blocks = + (dev->param.end_block - dev->param.start_block + 1); + + n_bytes += sizeof(struct yaffs_checkpt_validity); + n_bytes += sizeof(struct yaffs_checkpt_dev); + n_bytes += dev_blocks * sizeof(struct yaffs_block_info); + n_bytes += dev_blocks * dev->chunk_bit_stride; + n_bytes += + (sizeof(struct yaffs_checkpt_obj) + + sizeof(u32)) * (dev->n_obj); + n_bytes += (dev->tnode_size + sizeof(u32)) * (dev->n_tnodes); + n_bytes += sizeof(struct yaffs_checkpt_validity); + n_bytes += sizeof(u32); /* checksum */ + + /* Round up and add 2 blocks to allow for some bad blocks, so add 3 */ + + n_blocks = + (n_bytes / + (dev->data_bytes_per_chunk * + dev->param.chunks_per_block)) + 3; + + dev->checkpoint_blocks_required = n_blocks; + } + + retval = dev->checkpoint_blocks_required - dev->blocks_in_checkpt; + if (retval < 0) + retval = 0; + return retval; +} + +/*--------------------- Checkpointing --------------------*/ + +static int yaffs2_wr_checkpt_validity_marker(struct yaffs_dev *dev, int head) +{ + struct yaffs_checkpt_validity cp; + + memset(&cp, 0, sizeof(cp)); + + cp.struct_type = sizeof(cp); + cp.magic = YAFFS_MAGIC; + cp.version = YAFFS_CHECKPOINT_VERSION; + cp.head = (head) ? 1 : 0; + + return (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)) ? 1 : 0; +} + +static int yaffs2_rd_checkpt_validity_marker(struct yaffs_dev *dev, int head) +{ + struct yaffs_checkpt_validity cp; + int ok; + + ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); + + if (ok) + ok = (cp.struct_type == sizeof(cp)) && + (cp.magic == YAFFS_MAGIC) && + (cp.version == YAFFS_CHECKPOINT_VERSION) && + (cp.head == ((head) ? 1 : 0)); + return ok ? 1 : 0; +} + +static void yaffs2_dev_to_checkpt_dev(struct yaffs_checkpt_dev *cp, + struct yaffs_dev *dev) +{ + cp->n_erased_blocks = dev->n_erased_blocks; + cp->alloc_block = dev->alloc_block; + cp->alloc_page = dev->alloc_page; + cp->n_free_chunks = dev->n_free_chunks; + + cp->n_deleted_files = dev->n_deleted_files; + cp->n_unlinked_files = dev->n_unlinked_files; + cp->n_bg_deletions = dev->n_bg_deletions; + cp->seq_number = dev->seq_number; + +} + +static void yaffs_checkpt_dev_to_dev(struct yaffs_dev *dev, + struct yaffs_checkpt_dev *cp) +{ + dev->n_erased_blocks = cp->n_erased_blocks; + dev->alloc_block = cp->alloc_block; + dev->alloc_page = cp->alloc_page; + dev->n_free_chunks = cp->n_free_chunks; + + dev->n_deleted_files = cp->n_deleted_files; + dev->n_unlinked_files = cp->n_unlinked_files; + dev->n_bg_deletions = cp->n_bg_deletions; + dev->seq_number = cp->seq_number; +} + +static int yaffs2_wr_checkpt_dev(struct yaffs_dev *dev) +{ + struct yaffs_checkpt_dev cp; + u32 n_bytes; + u32 n_blocks = + (dev->internal_end_block - dev->internal_start_block + 1); + + int ok; + + /* Write device runtime values */ + yaffs2_dev_to_checkpt_dev(&cp, dev); + cp.struct_type = sizeof(cp); + + ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); + + /* Write block info */ + if (ok) { + n_bytes = n_blocks * sizeof(struct yaffs_block_info); + ok = (yaffs2_checkpt_wr(dev, dev->block_info, n_bytes) == + n_bytes); + } + + /* Write chunk bits */ + if (ok) { + n_bytes = n_blocks * dev->chunk_bit_stride; + ok = (yaffs2_checkpt_wr(dev, dev->chunk_bits, n_bytes) == + n_bytes); + } + return ok ? 1 : 0; + +} + +static int yaffs2_rd_checkpt_dev(struct yaffs_dev *dev) +{ + struct yaffs_checkpt_dev cp; + u32 n_bytes; + u32 n_blocks = + (dev->internal_end_block - dev->internal_start_block + 1); + + int ok; + + ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); + if (!ok) + return 0; + + if (cp.struct_type != sizeof(cp)) + return 0; + + yaffs_checkpt_dev_to_dev(dev, &cp); + + n_bytes = n_blocks * sizeof(struct yaffs_block_info); + + ok = (yaffs2_checkpt_rd(dev, dev->block_info, n_bytes) == n_bytes); + + if (!ok) + return 0; + n_bytes = n_blocks * dev->chunk_bit_stride; + + ok = (yaffs2_checkpt_rd(dev, dev->chunk_bits, n_bytes) == n_bytes); + + return ok ? 1 : 0; +} + +static void yaffs2_obj_checkpt_obj(struct yaffs_checkpt_obj *cp, + struct yaffs_obj *obj) +{ + + cp->obj_id = obj->obj_id; + cp->parent_id = (obj->parent) ? obj->parent->obj_id : 0; + cp->hdr_chunk = obj->hdr_chunk; + cp->variant_type = obj->variant_type; + cp->deleted = obj->deleted; + cp->soft_del = obj->soft_del; + cp->unlinked = obj->unlinked; + cp->fake = obj->fake; + cp->rename_allowed = obj->rename_allowed; + cp->unlink_allowed = obj->unlink_allowed; + cp->serial = obj->serial; + cp->n_data_chunks = obj->n_data_chunks; + + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) + cp->size_or_equiv_obj = obj->variant.file_variant.file_size; + else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) + cp->size_or_equiv_obj = obj->variant.hardlink_variant.equiv_id; +} + +static int taffs2_checkpt_obj_to_obj(struct yaffs_obj *obj, + struct yaffs_checkpt_obj *cp) +{ + + struct yaffs_obj *parent; + + if (obj->variant_type != cp->variant_type) { + yaffs_trace(YAFFS_TRACE_ERROR, + "Checkpoint read object %d type %d chunk %d does not match existing object type %d", + cp->obj_id, cp->variant_type, cp->hdr_chunk, + obj->variant_type); + return 0; + } + + obj->obj_id = cp->obj_id; + + if (cp->parent_id) + parent = yaffs_find_or_create_by_number(obj->my_dev, + cp->parent_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + else + parent = NULL; + + if (parent) { + if (parent->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY) { + yaffs_trace(YAFFS_TRACE_ALWAYS, + "Checkpoint read object %d parent %d type %d chunk %d Parent type, %d, not directory", + cp->obj_id, cp->parent_id, + cp->variant_type, cp->hdr_chunk, + parent->variant_type); + return 0; + } + yaffs_add_obj_to_dir(parent, obj); + } + + obj->hdr_chunk = cp->hdr_chunk; + obj->variant_type = cp->variant_type; + obj->deleted = cp->deleted; + obj->soft_del = cp->soft_del; + obj->unlinked = cp->unlinked; + obj->fake = cp->fake; + obj->rename_allowed = cp->rename_allowed; + obj->unlink_allowed = cp->unlink_allowed; + obj->serial = cp->serial; + obj->n_data_chunks = cp->n_data_chunks; + + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) + obj->variant.file_variant.file_size = cp->size_or_equiv_obj; + else if (obj->variant_type == YAFFS_OBJECT_TYPE_HARDLINK) + obj->variant.hardlink_variant.equiv_id = cp->size_or_equiv_obj; + + if (obj->hdr_chunk > 0) + obj->lazy_loaded = 1; + return 1; +} + +static int yaffs2_checkpt_tnode_worker(struct yaffs_obj *in, + struct yaffs_tnode *tn, u32 level, + int chunk_offset) +{ + int i; + struct yaffs_dev *dev = in->my_dev; + int ok = 1; + + if (tn) { + if (level > 0) { + + for (i = 0; i < YAFFS_NTNODES_INTERNAL && ok; i++) { + if (tn->internal[i]) { + ok = yaffs2_checkpt_tnode_worker(in, + tn-> + internal + [i], + level - + 1, + (chunk_offset + << + YAFFS_TNODES_INTERNAL_BITS) + + i); + } + } + } else if (level == 0) { + u32 base_offset = + chunk_offset << YAFFS_TNODES_LEVEL0_BITS; + ok = (yaffs2_checkpt_wr + (dev, &base_offset, + sizeof(base_offset)) == sizeof(base_offset)); + if (ok) + ok = (yaffs2_checkpt_wr + (dev, tn, + dev->tnode_size) == dev->tnode_size); + } + } + + return ok; + +} + +static int yaffs2_wr_checkpt_tnodes(struct yaffs_obj *obj) +{ + u32 end_marker = ~0; + int ok = 1; + + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) { + ok = yaffs2_checkpt_tnode_worker(obj, + obj->variant.file_variant.top, + obj->variant.file_variant. + top_level, 0); + if (ok) + ok = (yaffs2_checkpt_wr + (obj->my_dev, &end_marker, + sizeof(end_marker)) == sizeof(end_marker)); + } + + return ok ? 1 : 0; +} + +static int yaffs2_rd_checkpt_tnodes(struct yaffs_obj *obj) +{ + u32 base_chunk; + int ok = 1; + struct yaffs_dev *dev = obj->my_dev; + struct yaffs_file_var *file_stuct_ptr = &obj->variant.file_variant; + struct yaffs_tnode *tn; + int nread = 0; + + ok = (yaffs2_checkpt_rd(dev, &base_chunk, sizeof(base_chunk)) == + sizeof(base_chunk)); + + while (ok && (~base_chunk)) { + nread++; + /* Read level 0 tnode */ + + tn = yaffs_get_tnode(dev); + if (tn) { + ok = (yaffs2_checkpt_rd(dev, tn, dev->tnode_size) == + dev->tnode_size); + } else { + ok = 0; + } + + if (tn && ok) + ok = yaffs_add_find_tnode_0(dev, + file_stuct_ptr, + base_chunk, tn) ? 1 : 0; + + if (ok) + ok = (yaffs2_checkpt_rd + (dev, &base_chunk, + sizeof(base_chunk)) == sizeof(base_chunk)); + + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "Checkpoint read tnodes %d records, last %d. ok %d", + nread, base_chunk, ok); + + return ok ? 1 : 0; +} + +static int yaffs2_wr_checkpt_objs(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj; + struct yaffs_checkpt_obj cp; + int i; + int ok = 1; + struct list_head *lh; + + /* Iterate through the objects in each hash entry, + * dumping them to the checkpointing stream. + */ + + for (i = 0; ok && i < YAFFS_NOBJECT_BUCKETS; i++) { + list_for_each(lh, &dev->obj_bucket[i].list) { + if (lh) { + obj = + list_entry(lh, struct yaffs_obj, hash_link); + if (!obj->defered_free) { + yaffs2_obj_checkpt_obj(&cp, obj); + cp.struct_type = sizeof(cp); + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "Checkpoint write object %d parent %d type %d chunk %d obj addr %p", + cp.obj_id, cp.parent_id, + cp.variant_type, cp.hdr_chunk, obj); + + ok = (yaffs2_checkpt_wr + (dev, &cp, + sizeof(cp)) == sizeof(cp)); + + if (ok + && obj->variant_type == + YAFFS_OBJECT_TYPE_FILE) + ok = yaffs2_wr_checkpt_tnodes + (obj); + } + } + } + } + + /* Dump end of list */ + memset(&cp, 0xFF, sizeof(struct yaffs_checkpt_obj)); + cp.struct_type = sizeof(cp); + + if (ok) + ok = (yaffs2_checkpt_wr(dev, &cp, sizeof(cp)) == sizeof(cp)); + + return ok ? 1 : 0; +} + +static int yaffs2_rd_checkpt_objs(struct yaffs_dev *dev) +{ + struct yaffs_obj *obj; + struct yaffs_checkpt_obj cp; + int ok = 1; + int done = 0; + struct yaffs_obj *hard_list = NULL; + + while (ok && !done) { + ok = (yaffs2_checkpt_rd(dev, &cp, sizeof(cp)) == sizeof(cp)); + if (cp.struct_type != sizeof(cp)) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "struct size %d instead of %d ok %d", + cp.struct_type, (int)sizeof(cp), ok); + ok = 0; + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "Checkpoint read object %d parent %d type %d chunk %d ", + cp.obj_id, cp.parent_id, cp.variant_type, + cp.hdr_chunk); + + if (ok && cp.obj_id == ~0) { + done = 1; + } else if (ok) { + obj = + yaffs_find_or_create_by_number(dev, cp.obj_id, + cp.variant_type); + if (obj) { + ok = taffs2_checkpt_obj_to_obj(obj, &cp); + if (!ok) + break; + if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE) { + ok = yaffs2_rd_checkpt_tnodes(obj); + } else if (obj->variant_type == + YAFFS_OBJECT_TYPE_HARDLINK) { + obj->hard_links.next = + (struct list_head *)hard_list; + hard_list = obj; + } + } else { + ok = 0; + } + } + } + + if (ok) + yaffs_link_fixup(dev, hard_list); + + return ok ? 1 : 0; +} + +static int yaffs2_wr_checkpt_sum(struct yaffs_dev *dev) +{ + u32 checkpt_sum; + int ok; + + yaffs2_get_checkpt_sum(dev, &checkpt_sum); + + ok = (yaffs2_checkpt_wr(dev, &checkpt_sum, sizeof(checkpt_sum)) == + sizeof(checkpt_sum)); + + if (!ok) + return 0; + + return 1; +} + +static int yaffs2_rd_checkpt_sum(struct yaffs_dev *dev) +{ + u32 checkpt_sum0; + u32 checkpt_sum1; + int ok; + + yaffs2_get_checkpt_sum(dev, &checkpt_sum0); + + ok = (yaffs2_checkpt_rd(dev, &checkpt_sum1, sizeof(checkpt_sum1)) == + sizeof(checkpt_sum1)); + + if (!ok) + return 0; + + if (checkpt_sum0 != checkpt_sum1) + return 0; + + return 1; +} + +static int yaffs2_wr_checkpt_data(struct yaffs_dev *dev) +{ + int ok = 1; + + if (!yaffs2_checkpt_required(dev)) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "skipping checkpoint write"); + ok = 0; + } + + if (ok) + ok = yaffs2_checkpt_open(dev, 1); + + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint validity"); + ok = yaffs2_wr_checkpt_validity_marker(dev, 1); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint device"); + ok = yaffs2_wr_checkpt_dev(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint objects"); + ok = yaffs2_wr_checkpt_objs(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "write checkpoint validity"); + ok = yaffs2_wr_checkpt_validity_marker(dev, 0); + } + + if (ok) + ok = yaffs2_wr_checkpt_sum(dev); + + if (!yaffs_checkpt_close(dev)) + ok = 0; + + if (ok) + dev->is_checkpointed = 1; + else + dev->is_checkpointed = 0; + + return dev->is_checkpointed; +} + +static int yaffs2_rd_checkpt_data(struct yaffs_dev *dev) +{ + int ok = 1; + + if (!dev->param.is_yaffs2) + ok = 0; + + if (ok && dev->param.skip_checkpt_rd) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "skipping checkpoint read"); + ok = 0; + } + + if (ok) + ok = yaffs2_checkpt_open(dev, 0); /* open for read */ + + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint validity"); + ok = yaffs2_rd_checkpt_validity_marker(dev, 1); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint device"); + ok = yaffs2_rd_checkpt_dev(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint objects"); + ok = yaffs2_rd_checkpt_objs(dev); + } + if (ok) { + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint validity"); + ok = yaffs2_rd_checkpt_validity_marker(dev, 0); + } + + if (ok) { + ok = yaffs2_rd_checkpt_sum(dev); + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "read checkpoint checksum %d", ok); + } + + if (!yaffs_checkpt_close(dev)) + ok = 0; + + if (ok) + dev->is_checkpointed = 1; + else + dev->is_checkpointed = 0; + + return ok ? 1 : 0; + +} + +void yaffs2_checkpt_invalidate(struct yaffs_dev *dev) +{ + if (dev->is_checkpointed || dev->blocks_in_checkpt > 0) { + dev->is_checkpointed = 0; + yaffs2_checkpt_invalidate_stream(dev); + } + if (dev->param.sb_dirty_fn) + dev->param.sb_dirty_fn(dev); +} + +int yaffs_checkpoint_save(struct yaffs_dev *dev) +{ + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "save entry: is_checkpointed %d", + dev->is_checkpointed); + + yaffs_verify_objects(dev); + yaffs_verify_blocks(dev); + yaffs_verify_free_chunks(dev); + + if (!dev->is_checkpointed) { + yaffs2_checkpt_invalidate(dev); + yaffs2_wr_checkpt_data(dev); + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT | YAFFS_TRACE_MOUNT, + "save exit: is_checkpointed %d", + dev->is_checkpointed); + + return dev->is_checkpointed; +} + +int yaffs2_checkpt_restore(struct yaffs_dev *dev) +{ + int retval; + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "restore entry: is_checkpointed %d", + dev->is_checkpointed); + + retval = yaffs2_rd_checkpt_data(dev); + + if (dev->is_checkpointed) { + yaffs_verify_objects(dev); + yaffs_verify_blocks(dev); + yaffs_verify_free_chunks(dev); + } + + yaffs_trace(YAFFS_TRACE_CHECKPOINT, + "restore exit: is_checkpointed %d", + dev->is_checkpointed); + + return retval; +} + +int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size) +{ + /* if new_size > old_file_size. + * We're going to be writing a hole. + * If the hole is small then write zeros otherwise write a start of hole marker. + */ + + loff_t old_file_size; + int increase; + int small_hole; + int result = YAFFS_OK; + struct yaffs_dev *dev = NULL; + + u8 *local_buffer = NULL; + + int small_increase_ok = 0; + + if (!obj) + return YAFFS_FAIL; + + if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE) + return YAFFS_FAIL; + + dev = obj->my_dev; + + /* Bail out if not yaffs2 mode */ + if (!dev->param.is_yaffs2) + return YAFFS_OK; + + old_file_size = obj->variant.file_variant.file_size; + + if (new_size <= old_file_size) + return YAFFS_OK; + + increase = new_size - old_file_size; + + if (increase < YAFFS_SMALL_HOLE_THRESHOLD * dev->data_bytes_per_chunk && + yaffs_check_alloc_available(dev, YAFFS_SMALL_HOLE_THRESHOLD + 1)) + small_hole = 1; + else + small_hole = 0; + + if (small_hole) + local_buffer = yaffs_get_temp_buffer(dev, __LINE__); + + if (local_buffer) { + /* fill hole with zero bytes */ + int pos = old_file_size; + int this_write; + int written; + memset(local_buffer, 0, dev->data_bytes_per_chunk); + small_increase_ok = 1; + + while (increase > 0 && small_increase_ok) { + this_write = increase; + if (this_write > dev->data_bytes_per_chunk) + this_write = dev->data_bytes_per_chunk; + written = + yaffs_do_file_wr(obj, local_buffer, pos, this_write, + 0); + if (written == this_write) { + pos += this_write; + increase -= this_write; + } else { + small_increase_ok = 0; + } + } + + yaffs_release_temp_buffer(dev, local_buffer, __LINE__); + + /* If we were out of space then reverse any chunks we've added */ + if (!small_increase_ok) + yaffs_resize_file_down(obj, old_file_size); + } + + if (!small_increase_ok && + obj->parent && + obj->parent->obj_id != YAFFS_OBJECTID_UNLINKED && + obj->parent->obj_id != YAFFS_OBJECTID_DELETED) { + /* Write a hole start header with the old file size */ + yaffs_update_oh(obj, NULL, 0, 1, 0, NULL); + } + + return result; + +} + +struct yaffs_block_index { + int seq; + int block; +}; + +static int yaffs2_ybicmp(const void *a, const void *b) +{ + int aseq = ((struct yaffs_block_index *)a)->seq; + int bseq = ((struct yaffs_block_index *)b)->seq; + int ablock = ((struct yaffs_block_index *)a)->block; + int bblock = ((struct yaffs_block_index *)b)->block; + if (aseq == bseq) + return ablock - bblock; + else + return aseq - bseq; +} + +int yaffs2_scan_backwards(struct yaffs_dev *dev) +{ + struct yaffs_ext_tags tags; + int blk; + int block_iter; + int start_iter; + int end_iter; + int n_to_scan = 0; + + int chunk; + int result; + int c; + int deleted; + enum yaffs_block_state state; + struct yaffs_obj *hard_list = NULL; + struct yaffs_block_info *bi; + u32 seq_number; + struct yaffs_obj_hdr *oh; + struct yaffs_obj *in; + struct yaffs_obj *parent; + int n_blocks = dev->internal_end_block - dev->internal_start_block + 1; + int is_unlinked; + u8 *chunk_data; + + int file_size; + int is_shrink; + int found_chunks; + int equiv_id; + int alloc_failed = 0; + + struct yaffs_block_index *block_index = NULL; + int alt_block_index = 0; + + yaffs_trace(YAFFS_TRACE_SCAN, + "yaffs2_scan_backwards starts intstartblk %d intendblk %d...", + dev->internal_start_block, dev->internal_end_block); + + dev->seq_number = YAFFS_LOWEST_SEQUENCE_NUMBER; + + block_index = kmalloc(n_blocks * sizeof(struct yaffs_block_index), + GFP_NOFS); + + if (!block_index) { + block_index = + vmalloc(n_blocks * sizeof(struct yaffs_block_index)); + alt_block_index = 1; + } + + if (!block_index) { + yaffs_trace(YAFFS_TRACE_SCAN, + "yaffs2_scan_backwards() could not allocate block index!" + ); + return YAFFS_FAIL; + } + + dev->blocks_in_checkpt = 0; + + chunk_data = yaffs_get_temp_buffer(dev, __LINE__); + + /* Scan all the blocks to determine their state */ + bi = dev->block_info; + for (blk = dev->internal_start_block; blk <= dev->internal_end_block; + blk++) { + yaffs_clear_chunk_bits(dev, blk); + bi->pages_in_use = 0; + bi->soft_del_pages = 0; + + yaffs_query_init_block_state(dev, blk, &state, &seq_number); + + bi->block_state = state; + bi->seq_number = seq_number; + + if (bi->seq_number == YAFFS_SEQUENCE_CHECKPOINT_DATA) + bi->block_state = state = YAFFS_BLOCK_STATE_CHECKPOINT; + if (bi->seq_number == YAFFS_SEQUENCE_BAD_BLOCK) + bi->block_state = state = YAFFS_BLOCK_STATE_DEAD; + + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, + "Block scanning block %d state %d seq %d", + blk, state, seq_number); + + if (state == YAFFS_BLOCK_STATE_CHECKPOINT) { + dev->blocks_in_checkpt++; + + } else if (state == YAFFS_BLOCK_STATE_DEAD) { + yaffs_trace(YAFFS_TRACE_BAD_BLOCKS, + "block %d is bad", blk); + } else if (state == YAFFS_BLOCK_STATE_EMPTY) { + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "Block empty "); + dev->n_erased_blocks++; + dev->n_free_chunks += dev->param.chunks_per_block; + } else if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { + + /* Determine the highest sequence number */ + if (seq_number >= YAFFS_LOWEST_SEQUENCE_NUMBER && + seq_number < YAFFS_HIGHEST_SEQUENCE_NUMBER) { + + block_index[n_to_scan].seq = seq_number; + block_index[n_to_scan].block = blk; + + n_to_scan++; + + if (seq_number >= dev->seq_number) + dev->seq_number = seq_number; + } else { + /* TODO: Nasty sequence number! */ + yaffs_trace(YAFFS_TRACE_SCAN, + "Block scanning block %d has bad sequence number %d", + blk, seq_number); + + } + } + bi++; + } + + yaffs_trace(YAFFS_TRACE_SCAN, "%d blocks to be sorted...", n_to_scan); + + cond_resched(); + + /* Sort the blocks by sequence number */ + sort(block_index, n_to_scan, sizeof(struct yaffs_block_index), + yaffs2_ybicmp, NULL); + + cond_resched(); + + yaffs_trace(YAFFS_TRACE_SCAN, "...done"); + + /* Now scan the blocks looking at the data. */ + start_iter = 0; + end_iter = n_to_scan - 1; + yaffs_trace(YAFFS_TRACE_SCAN_DEBUG, "%d blocks to scan", n_to_scan); + + /* For each block.... backwards */ + for (block_iter = end_iter; !alloc_failed && block_iter >= start_iter; + block_iter--) { + /* Cooperative multitasking! This loop can run for so + long that watchdog timers expire. */ + cond_resched(); + + /* get the block to scan in the correct order */ + blk = block_index[block_iter].block; + + bi = yaffs_get_block_info(dev, blk); + + state = bi->block_state; + + deleted = 0; + + /* For each chunk in each block that needs scanning.... */ + found_chunks = 0; + for (c = dev->param.chunks_per_block - 1; + !alloc_failed && c >= 0 && + (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING || + state == YAFFS_BLOCK_STATE_ALLOCATING); c--) { + /* Scan backwards... + * Read the tags and decide what to do + */ + + chunk = blk * dev->param.chunks_per_block + c; + + result = yaffs_rd_chunk_tags_nand(dev, chunk, NULL, + &tags); + + /* Let's have a good look at this chunk... */ + + if (!tags.chunk_used) { + /* An unassigned chunk in the block. + * If there are used chunks after this one, then + * it is a chunk that was skipped due to failing the erased + * check. Just skip it so that it can be deleted. + * But, more typically, We get here when this is an unallocated + * chunk and his means that either the block is empty or + * this is the one being allocated from + */ + + if (found_chunks) { + /* This is a chunk that was skipped due to failing the erased check */ + } else if (c == 0) { + /* We're looking at the first chunk in the block so the block is unused */ + state = YAFFS_BLOCK_STATE_EMPTY; + dev->n_erased_blocks++; + } else { + if (state == + YAFFS_BLOCK_STATE_NEEDS_SCANNING + || state == + YAFFS_BLOCK_STATE_ALLOCATING) { + if (dev->seq_number == + bi->seq_number) { + /* this is the block being allocated from */ + + yaffs_trace(YAFFS_TRACE_SCAN, + " Allocating from %d %d", + blk, c); + + state = + YAFFS_BLOCK_STATE_ALLOCATING; + dev->alloc_block = blk; + dev->alloc_page = c; + dev-> + alloc_block_finder = + blk; + } else { + /* This is a partially written block that is not + * the current allocation block. + */ + + yaffs_trace(YAFFS_TRACE_SCAN, + "Partially written block %d detected", + blk); + } + } + } + + dev->n_free_chunks++; + + } else if (tags.ecc_result == YAFFS_ECC_RESULT_UNFIXED) { + yaffs_trace(YAFFS_TRACE_SCAN, + " Unfixed ECC in chunk(%d:%d), chunk ignored", + blk, c); + + dev->n_free_chunks++; + + } else if (tags.obj_id > YAFFS_MAX_OBJECT_ID || + tags.chunk_id > YAFFS_MAX_CHUNK_ID || + (tags.chunk_id > 0 + && tags.n_bytes > dev->data_bytes_per_chunk) + || tags.seq_number != bi->seq_number) { + yaffs_trace(YAFFS_TRACE_SCAN, + "Chunk (%d:%d) with bad tags:obj = %d, chunk_id = %d, n_bytes = %d, ignored", + blk, c, tags.obj_id, + tags.chunk_id, tags.n_bytes); + + dev->n_free_chunks++; + + } else if (tags.chunk_id > 0) { + /* chunk_id > 0 so it is a data chunk... */ + unsigned int endpos; + u32 chunk_base = + (tags.chunk_id - + 1) * dev->data_bytes_per_chunk; + + found_chunks = 1; + + yaffs_set_chunk_bit(dev, blk, c); + bi->pages_in_use++; + + in = yaffs_find_or_create_by_number(dev, + tags.obj_id, + YAFFS_OBJECT_TYPE_FILE); + if (!in) { + /* Out of memory */ + alloc_failed = 1; + } + + if (in && + in->variant_type == YAFFS_OBJECT_TYPE_FILE + && chunk_base < + in->variant.file_variant.shrink_size) { + /* This has not been invalidated by a resize */ + if (!yaffs_put_chunk_in_file + (in, tags.chunk_id, chunk, -1)) { + alloc_failed = 1; + } + + /* File size is calculated by looking at the data chunks if we have not + * seen an object header yet. Stop this practice once we find an object header. + */ + endpos = chunk_base + tags.n_bytes; + + if (!in->valid && /* have not got an object header yet */ + in->variant.file_variant. + scanned_size < endpos) { + in->variant.file_variant. + scanned_size = endpos; + in->variant.file_variant. + file_size = endpos; + } + + } else if (in) { + /* This chunk has been invalidated by a resize, or a past file deletion + * so delete the chunk*/ + yaffs_chunk_del(dev, chunk, 1, + __LINE__); + + } + } else { + /* chunk_id == 0, so it is an ObjectHeader. + * Thus, we read in the object header and make the object + */ + found_chunks = 1; + + yaffs_set_chunk_bit(dev, blk, c); + bi->pages_in_use++; + + oh = NULL; + in = NULL; + + if (tags.extra_available) { + in = yaffs_find_or_create_by_number(dev, + tags. + obj_id, + tags. + extra_obj_type); + if (!in) + alloc_failed = 1; + } + + if (!in || + (!in->valid && dev->param.disable_lazy_load) + || tags.extra_shadows || (!in->valid + && (tags.obj_id == + YAFFS_OBJECTID_ROOT + || tags. + obj_id == + YAFFS_OBJECTID_LOSTNFOUND))) + { + + /* If we don't have valid info then we need to read the chunk + * TODO In future we can probably defer reading the chunk and + * living with invalid data until needed. + */ + + result = yaffs_rd_chunk_tags_nand(dev, + chunk, + chunk_data, + NULL); + + oh = (struct yaffs_obj_hdr *)chunk_data; + + if (dev->param.inband_tags) { + /* Fix up the header if they got corrupted by inband tags */ + oh->shadows_obj = + oh->inband_shadowed_obj_id; + oh->is_shrink = + oh->inband_is_shrink; + } + + if (!in) { + in = yaffs_find_or_create_by_number(dev, tags.obj_id, oh->type); + if (!in) + alloc_failed = 1; + } + + } + + if (!in) { + /* TODO Hoosterman we have a problem! */ + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: Could not make object for object %d at chunk %d during scan", + tags.obj_id, chunk); + continue; + } + + if (in->valid) { + /* We have already filled this one. + * We have a duplicate that will be discarded, but + * we first have to suck out resize info if it is a file. + */ + + if ((in->variant_type == + YAFFS_OBJECT_TYPE_FILE) && ((oh + && + oh-> + type + == + YAFFS_OBJECT_TYPE_FILE) + || + (tags. + extra_available + && + tags. + extra_obj_type + == + YAFFS_OBJECT_TYPE_FILE))) + { + u32 this_size = + (oh) ? oh-> + file_size : + tags.extra_length; + u32 parent_obj_id = + (oh) ? oh->parent_obj_id : + tags.extra_parent_id; + + is_shrink = + (oh) ? oh-> + is_shrink : + tags.extra_is_shrink; + + /* If it is deleted (unlinked at start also means deleted) + * we treat the file size as being zeroed at this point. + */ + if (parent_obj_id == + YAFFS_OBJECTID_DELETED + || parent_obj_id == + YAFFS_OBJECTID_UNLINKED) { + this_size = 0; + is_shrink = 1; + } + + if (is_shrink + && in->variant.file_variant. + shrink_size > this_size) + in->variant. + file_variant. + shrink_size = + this_size; + + if (is_shrink) + bi->has_shrink_hdr = 1; + + } + /* Use existing - destroy this one. */ + yaffs_chunk_del(dev, chunk, 1, + __LINE__); + + } + + if (!in->valid && in->variant_type != + (oh ? oh->type : tags.extra_obj_type)) + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: Bad object type, %d != %d, for object %d at chunk %d during scan", + oh ? + oh->type : tags.extra_obj_type, + in->variant_type, tags.obj_id, + chunk); + + if (!in->valid && + (tags.obj_id == YAFFS_OBJECTID_ROOT || + tags.obj_id == + YAFFS_OBJECTID_LOSTNFOUND)) { + /* We only load some info, don't fiddle with directory structure */ + in->valid = 1; + + if (oh) { + + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + in->lazy_loaded = 0; + } else { + in->lazy_loaded = 1; + } + in->hdr_chunk = chunk; + + } else if (!in->valid) { + /* we need to load this info */ + + in->valid = 1; + in->hdr_chunk = chunk; + + if (oh) { + in->variant_type = oh->type; + + in->yst_mode = oh->yst_mode; + yaffs_load_attribs(in, oh); + + if (oh->shadows_obj > 0) + yaffs_handle_shadowed_obj + (dev, + oh->shadows_obj, + 1); + + yaffs_set_obj_name_from_oh(in, + oh); + parent = + yaffs_find_or_create_by_number + (dev, oh->parent_obj_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + + file_size = oh->file_size; + is_shrink = oh->is_shrink; + equiv_id = oh->equiv_id; + + } else { + in->variant_type = + tags.extra_obj_type; + parent = + yaffs_find_or_create_by_number + (dev, tags.extra_parent_id, + YAFFS_OBJECT_TYPE_DIRECTORY); + file_size = tags.extra_length; + is_shrink = + tags.extra_is_shrink; + equiv_id = tags.extra_equiv_id; + in->lazy_loaded = 1; + + } + in->dirty = 0; + + if (!parent) + alloc_failed = 1; + + /* directory stuff... + * hook up to parent + */ + + if (parent && parent->variant_type == + YAFFS_OBJECT_TYPE_UNKNOWN) { + /* Set up as a directory */ + parent->variant_type = + YAFFS_OBJECT_TYPE_DIRECTORY; + INIT_LIST_HEAD(&parent-> + variant.dir_variant.children); + } else if (!parent + || parent->variant_type != + YAFFS_OBJECT_TYPE_DIRECTORY) { + /* Hoosterman, another problem.... + * We're trying to use a non-directory as a directory + */ + + yaffs_trace(YAFFS_TRACE_ERROR, + "yaffs tragedy: attempting to use non-directory as a directory in scan. Put in lost+found." + ); + parent = dev->lost_n_found; + } + + yaffs_add_obj_to_dir(parent, in); + + is_unlinked = (parent == dev->del_dir) + || (parent == dev->unlinked_dir); + + if (is_shrink) { + /* Mark the block as having a shrink header */ + bi->has_shrink_hdr = 1; + } + + /* Note re hardlinks. + * Since we might scan a hardlink before its equivalent object is scanned + * we put them all in a list. + * After scanning is complete, we should have all the objects, so we run + * through this list and fix up all the chains. + */ + + switch (in->variant_type) { + case YAFFS_OBJECT_TYPE_UNKNOWN: + /* Todo got a problem */ + break; + case YAFFS_OBJECT_TYPE_FILE: + + if (in->variant. + file_variant.scanned_size < + file_size) { + /* This covers the case where the file size is greater + * than where the data is + * This will happen if the file is resized to be larger + * than its current data extents. + */ + in->variant. + file_variant. + file_size = + file_size; + in->variant. + file_variant. + scanned_size = + file_size; + } + + if (in->variant.file_variant. + shrink_size > file_size) + in->variant. + file_variant. + shrink_size = + file_size; + + break; + case YAFFS_OBJECT_TYPE_HARDLINK: + if (!is_unlinked) { + in->variant. + hardlink_variant. + equiv_id = equiv_id; + in->hard_links.next = + (struct list_head *) + hard_list; + hard_list = in; + } + break; + case YAFFS_OBJECT_TYPE_DIRECTORY: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SPECIAL: + /* Do nothing */ + break; + case YAFFS_OBJECT_TYPE_SYMLINK: + if (oh) { + in->variant. + symlink_variant. + alias = + yaffs_clone_str(oh-> + alias); + if (!in->variant. + symlink_variant. + alias) + alloc_failed = + 1; + } + break; + } + + } + + } + + } /* End of scanning for each chunk */ + + if (state == YAFFS_BLOCK_STATE_NEEDS_SCANNING) { + /* If we got this far while scanning, then the block is fully allocated. */ + state = YAFFS_BLOCK_STATE_FULL; + } + + bi->block_state = state; + + /* Now let's see if it was dirty */ + if (bi->pages_in_use == 0 && + !bi->has_shrink_hdr && + bi->block_state == YAFFS_BLOCK_STATE_FULL) { + yaffs_block_became_dirty(dev, blk); + } + + } + + yaffs_skip_rest_of_block(dev); + + if (alt_block_index) + vfree(block_index); + else + kfree(block_index); + + /* Ok, we've done all the scanning. + * Fix up the hard link chains. + * We should now have scanned all the objects, now it's time to add these + * hardlinks. + */ + yaffs_link_fixup(dev, hard_list); + + yaffs_release_temp_buffer(dev, chunk_data, __LINE__); + + if (alloc_failed) + return YAFFS_FAIL; + + yaffs_trace(YAFFS_TRACE_SCAN, "yaffs2_scan_backwards ends"); + + return YAFFS_OK; +} diff --git a/fs/yaffs2/yaffs_yaffs2.h b/fs/yaffs2/yaffs_yaffs2.h new file mode 100644 index 00000000000..e1a9287fc50 --- /dev/null +++ b/fs/yaffs2/yaffs_yaffs2.h @@ -0,0 +1,39 @@ +/* + * YAFFS: Yet another Flash File System . A NAND-flash specific file system. + * + * Copyright (C) 2002-2010 Aleph One Ltd. + * for Toby Churchill Ltd and Brightstar Engineering + * + * Created by Charles Manning <charles@aleph1.co.uk> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License version 2.1 as + * published by the Free Software Foundation. + * + * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. + */ + +#ifndef __YAFFS_YAFFS2_H__ +#define __YAFFS_YAFFS2_H__ + +#include "yaffs_guts.h" + +void yaffs_calc_oldest_dirty_seq(struct yaffs_dev *dev); +void yaffs2_find_oldest_dirty_seq(struct yaffs_dev *dev); +void yaffs2_clear_oldest_dirty_seq(struct yaffs_dev *dev, + struct yaffs_block_info *bi); +void yaffs2_update_oldest_dirty_seq(struct yaffs_dev *dev, unsigned block_no, + struct yaffs_block_info *bi); +int yaffs_block_ok_for_gc(struct yaffs_dev *dev, struct yaffs_block_info *bi); +u32 yaffs2_find_refresh_block(struct yaffs_dev *dev); +int yaffs2_checkpt_required(struct yaffs_dev *dev); +int yaffs_calc_checkpt_blocks_required(struct yaffs_dev *dev); + +void yaffs2_checkpt_invalidate(struct yaffs_dev *dev); +int yaffs2_checkpt_save(struct yaffs_dev *dev); +int yaffs2_checkpt_restore(struct yaffs_dev *dev); + +int yaffs2_handle_hole(struct yaffs_obj *obj, loff_t new_size); +int yaffs2_scan_backwards(struct yaffs_dev *dev); + +#endif diff --git a/fs/yaffs2/yportenv.h b/fs/yaffs2/yportenv.h index 13cc1eb6217..236f5793ecc 100644 --- a/fs/yaffs2/yportenv.h +++ b/fs/yaffs2/yportenv.h @@ -13,155 +13,56 @@ * Note: Only YAFFS headers are LGPL, YAFFS C code is covered by GPL. */ - -#ifndef __YPORTENV_H__ -#define __YPORTENV_H__ - -/* - * Define the MTD version in terms of Linux Kernel versions - * This allows yaffs to be used independantly of the kernel - * as well as with it. - */ - -#define MTD_VERSION(a, b, c) (((a) << 16) + ((b) << 8) + (c)) - -#if defined CONFIG_YAFFS_WINCE - -#include "ywinceenv.h" - -#elif defined __KERNEL__ - -#include "moduleconfig.h" - -/* Linux kernel */ +#ifndef __YPORTENV_LINUX_H__ +#define __YPORTENV_LINUX_H__ #include <linux/version.h> -#define MTD_VERSION_CODE LINUX_VERSION_CODE - -#if (LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)) -#include <linux/config.h> -#endif #include <linux/kernel.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/vmalloc.h> +#include <linux/xattr.h> +#include <linux/list.h> +#include <linux/types.h> +#include <linux/fs.h> +#include <linux/stat.h> +#include <linux/sort.h> +#include <linux/bitops.h> #define YCHAR char #define YUCHAR unsigned char #define _Y(x) x -#define yaffs_strcat(a, b) strcat(a, b) -#define yaffs_strcpy(a, b) strcpy(a, b) -#define yaffs_strncpy(a, b, c) strncpy(a, b, c) -#define yaffs_strncmp(a, b, c) strncmp(a, b, c) -#define yaffs_strnlen(s,m) strnlen(s,m) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) - -#define Y_INLINE inline #define YAFFS_LOSTNFOUND_NAME "lost+found" #define YAFFS_LOSTNFOUND_PREFIX "obj" -/* #define YPRINTF(x) printk x */ -#define YMALLOC(x) kmalloc(x, GFP_NOFS) -#define YFREE(x) kfree(x) -#define YMALLOC_ALT(x) vmalloc(x) -#define YFREE_ALT(x) vfree(x) -#define YMALLOC_DMA(x) YMALLOC(x) - -#define YYIELD() schedule() -#define Y_DUMP_STACK() dump_stack() #define YAFFS_ROOT_MODE 0755 #define YAFFS_LOSTNFOUND_MODE 0700 -#if (LINUX_VERSION_CODE > KERNEL_VERSION(2, 5, 0)) #define Y_CURRENT_TIME CURRENT_TIME.tv_sec #define Y_TIME_CONVERT(x) (x).tv_sec -#else -#define Y_CURRENT_TIME CURRENT_TIME -#define Y_TIME_CONVERT(x) (x) -#endif - -#define yaffs_SumCompare(x, y) ((x) == (y)) -#define yaffs_strcmp(a, b) strcmp(a, b) - -#define TENDSTR "\n" -#define TSTR(x) KERN_DEBUG x -#define TCONT(x) x -#define TOUT(p) printk p #define compile_time_assertion(assertion) \ ({ int x = __builtin_choose_expr(assertion, 0, (void)0); (void) x; }) -#elif defined CONFIG_YAFFS_DIRECT - -#define MTD_VERSION_CODE MTD_VERSION(2, 6, 22) - -/* Direct interface */ -#include "ydirectenv.h" - -#elif defined CONFIG_YAFFS_UTIL - -/* Stuff for YAFFS utilities */ - -#include "stdlib.h" -#include "stdio.h" -#include "string.h" - -#include "devextras.h" - -#define YMALLOC(x) malloc(x) -#define YFREE(x) free(x) -#define YMALLOC_ALT(x) malloc(x) -#define YFREE_ALT(x) free(x) - -#define YCHAR char -#define YUCHAR unsigned char -#define _Y(x) x -#define yaffs_strcat(a, b) strcat(a, b) -#define yaffs_strcpy(a, b) strcpy(a, b) -#define yaffs_strncpy(a, b, c) strncpy(a, b, c) -#define yaffs_strnlen(s,m) strnlen(s,m) -#define yaffs_sprintf sprintf -#define yaffs_toupper(a) toupper(a) - -#define Y_INLINE inline - -/* #define YINFO(s) YPRINTF(( __FILE__ " %d %s\n",__LINE__,s)) */ -/* #define YALERT(s) YINFO(s) */ - -#define TENDSTR "\n" -#define TSTR(x) x -#define TOUT(p) printf p - -#define YAFFS_LOSTNFOUND_NAME "lost+found" -#define YAFFS_LOSTNFOUND_PREFIX "obj" -/* #define YPRINTF(x) printf x */ - -#define YAFFS_ROOT_MODE 0755 -#define YAFFS_LOSTNFOUND_MODE 0700 - -#define yaffs_SumCompare(x, y) ((x) == (y)) -#define yaffs_strcmp(a, b) strcmp(a, b) - -#else -/* Should have specified a configuration type */ -#error Unknown configuration - -#endif #ifndef Y_DUMP_STACK -#define Y_DUMP_STACK() do { } while (0) +#define Y_DUMP_STACK() dump_stack() #endif +#define yaffs_trace(msk, fmt, ...) do { \ + if(yaffs_trace_mask & ((msk) | YAFFS_TRACE_ALWAYS)) \ + printk(KERN_DEBUG "yaffs: " fmt "\n", ##__VA_ARGS__); \ +} while(0) + #ifndef YBUG #define YBUG() do {\ - T(YAFFS_TRACE_BUG,\ - (TSTR("==>> yaffs bug: " __FILE__ " %d" TENDSTR),\ - __LINE__));\ + yaffs_trace(YAFFS_TRACE_BUG,\ + "bug " __FILE__ " %d",\ + __LINE__);\ Y_DUMP_STACK();\ } while (0) #endif |