diff options
Diffstat (limited to 'ext4_utils/ext4fixup.c')
| -rw-r--r-- | ext4_utils/ext4fixup.c | 817 |
1 files changed, 0 insertions, 817 deletions
diff --git a/ext4_utils/ext4fixup.c b/ext4_utils/ext4fixup.c deleted file mode 100644 index 508e8bd6..00000000 --- a/ext4_utils/ext4fixup.c +++ /dev/null @@ -1,817 +0,0 @@ -/* - * Copyright (C) 2010 The Android Open Source Project - * - * Licensed under the Apache License, Version 2.0 (the "License"); - * you may not use this file except in compliance with the License. - * You may obtain a copy of the License at - * - * http://www.apache.org/licenses/LICENSE-2.0 - * - * Unless required by applicable law or agreed to in writing, software - * distributed under the License is distributed on an "AS IS" BASIS, - * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - * See the License for the specific language governing permissions and - * limitations under the License. - */ - -#include "ext4fixup.h" - -#ifndef _LARGEFILE64_SOURCE -#define _LARGEFILE64_SOURCE 1 -#endif - -#include <fcntl.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> - -#include <sparse/sparse.h> - -#include "allocate.h" -#include "ext4_utils/ext4_extents.h" -#include "ext4_utils/ext4_utils.h" -#include "ext4_utils/make_ext4fs.h" - -#ifndef _WIN32 -#include <sys/mman.h> -#endif - -#if defined(__APPLE__) && defined(__MACH__) -#define lseek64 lseek -#define off64_t off_t -#endif - -/* The inode block count for a file/directory is in units of 512 byte blocks, - * _NOT_ the filesystem block size! - */ -#define INODE_BLOCK_SIZE 512 - -#define MAX_EXT4_BLOCK_SIZE 4096 - -/* The two modes the recurse_dir() can be in */ -#define SANITY_CHECK_PASS 1 -#define MARK_INODE_NUMS 2 -#define UPDATE_INODE_NUMS 3 - -/* Magic numbers to indicate what state the update process is in */ -#define MAGIC_STATE_MARKING_INUMS 0x7000151515565512ll -#define MAGIC_STATE_UPDATING_INUMS 0x6121131211735123ll -#define MAGIC_STATE_UPDATING_SB 0x15e1715151558477ll - -/* Internal state variables corresponding to the magic numbers */ -#define STATE_UNSET 0 -#define STATE_MARKING_INUMS 1 -#define STATE_UPDATING_INUMS 2 -#define STATE_UPDATING_SB 3 - -/* Used for automated testing of this programs ability to stop and be restarted wthout error */ -static int bail_phase = 0; -static int bail_loc = 0; -static int bail_count = 0; -static int count = 0; - -/* global flags */ -static int verbose = 0; -static int no_write = 0; - -static int new_inodes_per_group = 0; - -static int no_write_fixup_state = 0; - -static int compute_new_inum(unsigned int old_inum) -{ - unsigned int group, offset; - - group = (old_inum - 1) / info.inodes_per_group; - offset = (old_inum -1) % info.inodes_per_group; - - return (group * new_inodes_per_group) + offset + 1; -} - -static int get_fs_fixup_state(int fd) -{ - unsigned long long magic; - int ret, len; - - if (no_write) { - return no_write_fixup_state; - } - - lseek64(fd, 0, SEEK_SET); - len = read(fd, &magic, sizeof(magic)); - if (len != sizeof(magic)) { - critical_error("cannot read fixup_state\n"); - } - - switch (magic) { - case MAGIC_STATE_MARKING_INUMS: - ret = STATE_MARKING_INUMS; - break; - case MAGIC_STATE_UPDATING_INUMS: - ret = STATE_UPDATING_INUMS; - break; - case MAGIC_STATE_UPDATING_SB: - ret = STATE_UPDATING_SB; - break; - default: - ret = STATE_UNSET; - } - return ret; -} - -static int set_fs_fixup_state(int fd, int state) -{ - unsigned long long magic; - struct ext4_super_block sb; - int len; - - if (no_write) { - no_write_fixup_state = state; - return 0; - } - - switch (state) { - case STATE_MARKING_INUMS: - magic = MAGIC_STATE_MARKING_INUMS; - break; - case STATE_UPDATING_INUMS: - magic = MAGIC_STATE_UPDATING_INUMS; - break; - case STATE_UPDATING_SB: - magic = MAGIC_STATE_UPDATING_SB; - break; - case STATE_UNSET: - default: - magic = 0ll; - break; - } - - lseek64(fd, 0, SEEK_SET); - len = write(fd, &magic, sizeof(magic)); - if (len != sizeof(magic)) { - critical_error("cannot write fixup_state\n"); - } - - read_sb(fd, &sb); - if (magic) { - /* If we are in the process of updating the filesystem, make it unmountable */ - sb.s_desc_size |= 1; - } else { - /* we are done, so make the filesystem mountable again */ - sb.s_desc_size &= ~1; - } - - if (!no_write) { - write_sb(fd, 1024, &sb); - } - - return 0; -} - -static int read_inode(int fd, unsigned int inum, struct ext4_inode *inode) -{ - unsigned int bg_num, bg_offset; - off64_t inode_offset; - int len; - - bg_num = (inum-1) / info.inodes_per_group; - bg_offset = (inum-1) % info.inodes_per_group; - - inode_offset = ((unsigned long long)aux_info.bg_desc[bg_num].bg_inode_table * info.block_size) + - (bg_offset * info.inode_size); - - if (lseek64(fd, inode_offset, SEEK_SET) < 0) { - critical_error_errno("failed to seek to inode %d\n", inum); - } - - len=read(fd, inode, sizeof(*inode)); - if (len != sizeof(*inode)) { - critical_error_errno("failed to read inode %d\n", inum); - } - - return 0; -} - -static int read_block(int fd, unsigned long long block_num, void *block) -{ - off64_t off; - unsigned int len; - - off = block_num * info.block_size; - - if (lseek64(fd, off, SEEK_SET) , 0) { - critical_error_errno("failed to seek to block %lld\n", block_num); - } - - len=read(fd, block, info.block_size); - if (len != info.block_size) { - critical_error_errno("failed to read block %lld\n", block_num); - } - - return 0; -} - -static int write_block(int fd, unsigned long long block_num, void *block) -{ - off64_t off; - unsigned int len; - - if (no_write) { - return 0; - } - - off = block_num * info.block_size; - - if (lseek64(fd, off, SEEK_SET) < 0) { - critical_error_errno("failed to seek to block %lld\n", block_num); - } - - len=write(fd, block, info.block_size); - if (len != info.block_size) { - critical_error_errno("failed to write block %lld\n", block_num); - } - - return 0; -} - -static void check_inode_bitmap(int fd, unsigned int bg_num) -{ - unsigned int inode_bitmap_block_num; - unsigned char block[MAX_EXT4_BLOCK_SIZE]; - int i, bitmap_updated = 0; - - /* Using the bg_num, aux_info.bg_desc[], info.inodes_per_group and - * new_inodes_per_group, retrieve the inode bitmap, and make sure - * the bits between the old and new size are clear - */ - inode_bitmap_block_num = aux_info.bg_desc[bg_num].bg_inode_bitmap; - - read_block(fd, inode_bitmap_block_num, block); - - for (i = info.inodes_per_group; i < new_inodes_per_group; i++) { - if (bitmap_get_bit(block, i)) { - bitmap_clear_bit(block, i); - bitmap_updated = 1; - } - } - - if (bitmap_updated) { - if (verbose) { - printf("Warning: updated inode bitmap for block group %d\n", bg_num); - } - write_block(fd, inode_bitmap_block_num, block); - } - - return; -} - -/* Update the superblock and bgdesc of the specified block group */ -static int update_superblocks_and_bg_desc(int fd, int state) -{ - off64_t ret; - struct ext4_super_block sb; - unsigned int num_block_groups, total_new_inodes; - unsigned int i; - - - read_sb(fd, &sb); - - /* Compute how many more inodes are now available */ - num_block_groups = DIV_ROUND_UP(aux_info.len_blocks, info.blocks_per_group); - total_new_inodes = num_block_groups * (new_inodes_per_group - sb.s_inodes_per_group); - - if (verbose) { - printf("created %d additional inodes\n", total_new_inodes); - } - - /* Update the free inodes count in each block group descriptor */ - for (i = 0; i < num_block_groups; i++) { - if (state == STATE_UPDATING_SB) { - aux_info.bg_desc[i].bg_free_inodes_count += (new_inodes_per_group - sb.s_inodes_per_group); - } - check_inode_bitmap(fd, i); - } - - /* First some sanity checks */ - if ((sb.s_inodes_count + total_new_inodes) != (new_inodes_per_group * num_block_groups)) { - critical_error("Failed sanity check on new inode count\n"); - } - if (new_inodes_per_group % (info.block_size/info.inode_size)) { - critical_error("Failed sanity check on new inode per group alignment\n"); - } - - /* Update the free inodes count in the superblock */ - sb.s_inodes_count += total_new_inodes; - sb.s_free_inodes_count += total_new_inodes; - sb.s_inodes_per_group = new_inodes_per_group; - - for (i = 0; i < aux_info.groups; i++) { - if (ext4_bg_has_super_block(i)) { - unsigned int sb_offset; - - if (i == 0) { - /* The first superblock is offset by 1K to leave room for boot sectors */ - sb_offset = 1024; - } else { - sb_offset = 0; - } - - sb.s_block_group_nr = i; - /* Don't write out the backup superblocks with the bit set in the s_desc_size - * which prevents the filesystem from mounting. The bit for the primary - * superblock will be cleared on the final call to set_fs_fixup_state() */ - if (i != 0) { - sb.s_desc_size &= ~1; - } - - if (!no_write) { - write_sb(fd, - (unsigned long long)i - * info.blocks_per_group * info.block_size - + sb_offset, - &sb); - } - - ret = lseek64(fd, ((unsigned long long)i * info.blocks_per_group * info.block_size) + - (info.block_size * (aux_info.first_data_block + 1)), SEEK_SET); - if (ret < 0) - critical_error_errno("failed to seek to block group descriptors"); - - if (!no_write) { - ret = write(fd, aux_info.bg_desc, info.block_size * aux_info.bg_desc_blocks); - if (ret < 0) - critical_error_errno("failed to write block group descriptors"); - if (ret != (int)info.block_size * (int)aux_info.bg_desc_blocks) - critical_error("failed to write all of block group descriptors"); - } - } - if ((bail_phase == 4) && ((unsigned int)bail_count == i)) { - critical_error("bailing at phase 4\n"); - } - } - - return 0; -} - - -static int get_direct_blocks(struct ext4_inode *inode, unsigned long long *block_list, - unsigned int *count) -{ - unsigned int i = 0; - unsigned int ret = 0; - unsigned int sectors_per_block; - - sectors_per_block = info.block_size / INODE_BLOCK_SIZE; - while ((i < (inode->i_blocks_lo / sectors_per_block)) && (i < EXT4_NDIR_BLOCKS)) { - block_list[i] = inode->i_block[i]; - i++; - } - - *count += i; - - if ((inode->i_blocks_lo / sectors_per_block) > EXT4_NDIR_BLOCKS) { - ret = 1; - } - - return ret; -} - -static int get_indirect_blocks(int fd, struct ext4_inode *inode, - unsigned long long *block_list, unsigned int *count) -{ - unsigned int i; - unsigned int *indirect_block; - unsigned int sectors_per_block; - - sectors_per_block = info.block_size / INODE_BLOCK_SIZE; - - indirect_block = (unsigned int *)malloc(info.block_size); - if (indirect_block == 0) { - critical_error("failed to allocate memory for indirect_block\n"); - } - - read_block(fd, inode->i_block[EXT4_NDIR_BLOCKS], indirect_block); - - for(i = 0; i < (inode->i_blocks_lo / sectors_per_block - EXT4_NDIR_BLOCKS); i++) { - block_list[EXT4_NDIR_BLOCKS+i] = indirect_block[i]; - } - - *count += i; - - free(indirect_block); - - return 0; -} - -static int get_block_list_indirect(int fd, struct ext4_inode *inode, unsigned long long *block_list) -{ - unsigned int count=0; - - if (get_direct_blocks(inode, block_list, &count)) { - get_indirect_blocks(fd, inode, block_list, &count); - } - - return count; -} - -static int get_extent_ents(struct ext4_extent_header *ext_hdr, unsigned long long *block_list) -{ - int i, j; - struct ext4_extent *extent; - off64_t fs_block_num; - - if (ext_hdr->eh_depth != 0) { - critical_error("get_extent_ents called with eh_depth != 0\n"); - } - - /* The extent entries immediately follow the header, so add 1 to the pointer - * and cast it to an extent pointer. - */ - extent = (struct ext4_extent *)(ext_hdr + 1); - - for (i = 0; i < ext_hdr->eh_entries; i++) { - fs_block_num = ((off64_t)extent->ee_start_hi << 32) | extent->ee_start_lo; - for (j = 0; j < extent->ee_len; j++) { - block_list[extent->ee_block+j] = fs_block_num+j; - } - extent++; - } - - return 0; -} - -static int get_extent_idx(int fd, struct ext4_extent_header *ext_hdr, unsigned long long *block_list) -{ - int i; - struct ext4_extent_idx *extent_idx; - struct ext4_extent_header *tmp_ext_hdr; - off64_t fs_block_num; - unsigned char block[MAX_EXT4_BLOCK_SIZE]; - - /* Sanity check */ - if (ext_hdr->eh_depth == 0) { - critical_error("get_extent_idx called with eh_depth == 0\n"); - } - - /* The extent entries immediately follow the header, so add 1 to the pointer - * and cast it to an extent pointer. - */ - extent_idx = (struct ext4_extent_idx *)(ext_hdr + 1); - - for (i = 0; i < ext_hdr->eh_entries; i++) { - fs_block_num = ((off64_t)extent_idx->ei_leaf_hi << 32) | extent_idx->ei_leaf_lo; - read_block(fd, fs_block_num, block); - tmp_ext_hdr = (struct ext4_extent_header *)block; - - if (tmp_ext_hdr->eh_depth == 0) { - get_extent_ents(tmp_ext_hdr, block_list); /* leaf node, fill in block_list */ - } else { - get_extent_idx(fd, tmp_ext_hdr, block_list); /* recurse down the tree */ - } - } - - return 0; -} - -static int get_block_list_extents(int fd, struct ext4_inode *inode, unsigned long long *block_list) -{ - struct ext4_extent_header *extent_hdr; - - extent_hdr = (struct ext4_extent_header *)inode->i_block; - - if (extent_hdr->eh_magic != EXT4_EXT_MAGIC) { - critical_error("extent header has unexpected magic value 0x%4.4x\n", - extent_hdr->eh_magic); - } - - if (extent_hdr->eh_depth == 0) { - get_extent_ents((struct ext4_extent_header *)inode->i_block, block_list); - return 0; - } - - get_extent_idx(fd, (struct ext4_extent_header *)inode->i_block, block_list); - - return 0; -} - -static int is_entry_dir(int fd, struct ext4_dir_entry_2 *dirp, int pass) -{ - struct ext4_inode inode; - int ret = 0; - - if (dirp->file_type == EXT4_FT_DIR) { - ret = 1; - } else if (dirp->file_type == EXT4_FT_UNKNOWN) { - /* Somebody was too lazy to fill in the dir entry, - * so we have to go fetch it from the inode. Grrr. - */ - /* if UPDATE_INODE_NUMS pass and the inode high bit is not - * set return false so we don't recurse down the tree that is - * already updated. Otherwise, fetch inode, and return answer. - */ - if ((pass == UPDATE_INODE_NUMS) && !(dirp->inode & 0x80000000)) { - ret = 0; - } else { - read_inode(fd, (dirp->inode & 0x7fffffff), &inode); - if (S_ISDIR(inode.i_mode)) { - ret = 1; - } - } - } - - return ret; -} - -static int recurse_dir(int fd, struct ext4_inode *inode, char *dirbuf, int dirsize, int mode) -{ - unsigned long long *block_list; - unsigned int num_blocks; - struct ext4_dir_entry_2 *dirp, *prev_dirp = 0; - char name[256]; - unsigned int i, leftover_space, is_dir; - struct ext4_inode tmp_inode; - int tmp_dirsize; - char *tmp_dirbuf; - - switch (mode) { - case SANITY_CHECK_PASS: - case MARK_INODE_NUMS: - case UPDATE_INODE_NUMS: - break; - default: - critical_error("recurse_dir() called witn unknown mode!\n"); - } - - if (dirsize % info.block_size) { - critical_error("dirsize %d not a multiple of block_size %d. This is unexpected!\n", - dirsize, info.block_size); - } - - num_blocks = dirsize / info.block_size; - - block_list = malloc((num_blocks + 1) * sizeof(*block_list)); - if (block_list == 0) { - critical_error("failed to allocate memory for block_list\n"); - } - - if (inode->i_flags & EXT4_EXTENTS_FL) { - get_block_list_extents(fd, inode, block_list); - } else { - /* A directory that requires doubly or triply indirect blocks in huge indeed, - * and will almost certainly not exist, especially since make_ext4fs only creates - * directories with extents, and the kernel will too, but check to make sure the - * directory is not that big and give an error if so. Our limit is 12 direct blocks, - * plus block_size/4 singly indirect blocks, which for a filesystem with 4K blocks - * is a directory 1036 blocks long, or 4,243,456 bytes long! Assuming an average - * filename length of 20 (which I think is generous) thats 20 + 8 bytes overhead - * per entry, or 151,552 entries in the directory! - */ - if (num_blocks > (info.block_size / 4 + EXT4_NDIR_BLOCKS)) { - critical_error("Non-extent based directory is too big!\n"); - } - get_block_list_indirect(fd, inode, block_list); - } - - /* Read in all the blocks for this directory */ - for (i = 0; i < num_blocks; i++) { - read_block(fd, block_list[i], dirbuf + (i * info.block_size)); - } - - dirp = (struct ext4_dir_entry_2 *)dirbuf; - while (dirp < (struct ext4_dir_entry_2 *)(dirbuf + dirsize)) { - count++; - leftover_space = (char *)(dirbuf + dirsize) - (char *)dirp; - if (((mode == SANITY_CHECK_PASS) || (mode == UPDATE_INODE_NUMS)) && - (leftover_space <= 8) && prev_dirp) { - /* This is a bug in an older version of make_ext4fs, where it - * didn't properly include the rest of the block in rec_len. - * Update rec_len on the previous entry to include the rest of - * the block and exit the loop. - */ - if (verbose) { - printf("fixing up short rec_len for diretory entry for %s\n", name); - } - prev_dirp->rec_len += leftover_space; - break; - } - - if (dirp->inode == 0) { - /* This is the last entry in the directory */ - break; - } - - strncpy(name, dirp->name, dirp->name_len); - name[dirp->name_len]='\0'; - - /* Only recurse on pass UPDATE_INODE_NUMS if the high bit is set. - * Otherwise, this inode entry has already been updated - * and we'll do the wrong thing. Also don't recurse on . or .., - * and certainly not on non-directories! - */ - /* Hrm, looks like filesystems made by fastboot on stingray set the file_type - * flag, but the lost+found directory has the type set to Unknown, which - * seems to imply I need to read the inode and get it. - */ - is_dir = is_entry_dir(fd, dirp, mode); - if ( is_dir && (strcmp(name, ".") && strcmp(name, "..")) && - ((mode == SANITY_CHECK_PASS) || (mode == MARK_INODE_NUMS) || - ((mode == UPDATE_INODE_NUMS) && (dirp->inode & 0x80000000))) ) { - /* A directory! Recurse! */ - read_inode(fd, dirp->inode & 0x7fffffff, &tmp_inode); - - if (!S_ISDIR(tmp_inode.i_mode)) { - critical_error("inode %d for name %s does not point to a directory\n", - dirp->inode & 0x7fffffff, name); - } - if (verbose) { - printf("inode %d %s use extents\n", dirp->inode & 0x7fffffff, - (tmp_inode.i_flags & EXT4_EXTENTS_FL) ? "does" : "does not"); - } - - tmp_dirsize = tmp_inode.i_blocks_lo * INODE_BLOCK_SIZE; - if (verbose) { - printf("dir size = %d bytes\n", tmp_dirsize); - } - - tmp_dirbuf = malloc(tmp_dirsize); - if (tmp_dirbuf == 0) { - critical_error("failed to allocate memory for tmp_dirbuf\n"); - } - - recurse_dir(fd, &tmp_inode, tmp_dirbuf, tmp_dirsize, mode); - - free(tmp_dirbuf); - } - - if (verbose) { - if (is_dir) { - printf("Directory %s\n", name); - } else { - printf("Non-directory %s\n", name); - } - } - - /* Process entry based on current mode. Either set high bit or change inode number */ - if (mode == MARK_INODE_NUMS) { - dirp->inode |= 0x80000000; - } else if (mode == UPDATE_INODE_NUMS) { - if (dirp->inode & 0x80000000) { - dirp->inode = compute_new_inum(dirp->inode & 0x7fffffff); - } - } - - if ((bail_phase == mode) && (bail_loc == 1) && (bail_count == count)) { - critical_error("Bailing at phase %d, loc 1 and count %d\n", mode, count); - } - - /* Point dirp at the next entry */ - prev_dirp = dirp; - dirp = (struct ext4_dir_entry_2*)((char *)dirp + dirp->rec_len); - } - - /* Write out all the blocks for this directory */ - for (i = 0; i < num_blocks; i++) { - write_block(fd, block_list[i], dirbuf + (i * info.block_size)); - if ((bail_phase == mode) && (bail_loc == 2) && (bail_count <= count)) { - critical_error("Bailing at phase %d, loc 2 and count %d\n", mode, count); - } - } - - free(block_list); - - return 0; -} - -int ext4fixup(char *fsdev) -{ - return ext4fixup_internal(fsdev, 0, 0, 0, 0, 0); -} - -int ext4fixup_internal(char *fsdev, int v_flag, int n_flag, - int stop_phase, int stop_loc, int stop_count) -{ - int fd; - struct ext4_inode root_inode; - unsigned int dirsize; - char *dirbuf; - - if (setjmp(setjmp_env)) - return EXIT_FAILURE; /* Handle a call to longjmp() */ - - verbose = v_flag; - no_write = n_flag; - - bail_phase = stop_phase; - bail_loc = stop_loc; - bail_count = stop_count; - - fd = open(fsdev, O_RDWR); - - if (fd < 0) - critical_error_errno("failed to open filesystem image"); - - read_ext(fd, verbose); - - if (info.feat_incompat & EXT4_FEATURE_INCOMPAT_RECOVER) { - critical_error("Filesystem needs recovery first, mount and unmount to do that\n"); - } - - /* Clear the low bit which is set while this tool is in progress. - * If the tool crashes, it will still be set when we restart. - * The low bit is set to make the filesystem unmountable while - * it is being fixed up. Also allow 0, which means the old ext2 - * size is in use. - */ - if (((aux_info.sb->s_desc_size & ~1) != sizeof(struct ext2_group_desc)) && - ((aux_info.sb->s_desc_size & ~1) != 0)) - critical_error("error: bg_desc_size != sizeof(struct ext2_group_desc)\n"); - - if ((info.feat_incompat & EXT4_FEATURE_INCOMPAT_FILETYPE) == 0) { - critical_error("Expected filesystem to have filetype flag set\n"); - } - -#if 0 // If we have to fix the directory rec_len issue, we can't use this check - /* Check to see if the inodes/group is copacetic */ - if (info.inodes_per_blockgroup % (info.block_size/info.inode_size) == 0) { - /* This filesystem has either already been updated, or was - * made correctly. - */ - if (verbose) { - printf("%s: filesystem correct, no work to do\n", me); - } - exit(0); - } -#endif - - /* Compute what the new value of inodes_per_blockgroup will be when we're done */ - new_inodes_per_group=EXT4_ALIGN(info.inodes_per_group,(info.block_size/info.inode_size)); - - read_inode(fd, EXT4_ROOT_INO, &root_inode); - - if (!S_ISDIR(root_inode.i_mode)) { - critical_error("root inode %d does not point to a directory\n", EXT4_ROOT_INO); - } - if (verbose) { - printf("inode %d %s use extents\n", EXT4_ROOT_INO, - (root_inode.i_flags & EXT4_EXTENTS_FL) ? "does" : "does not"); - } - - dirsize = root_inode.i_blocks_lo * INODE_BLOCK_SIZE; - if (verbose) { - printf("root dir size = %d bytes\n", dirsize); - } - - dirbuf = malloc(dirsize); - if (dirbuf == 0) { - critical_error("failed to allocate memory for dirbuf\n"); - } - - /* Perform a sanity check pass first, try to catch any errors that will occur - * before we actually change anything, so we don't leave a filesystem in a - * corrupted, unrecoverable state. Set no_write, make it quiet, and do a recurse - * pass and a update_superblock pass. Set flags back to requested state when done. - * Only perform sanity check if the state is unset. If the state is _NOT_ unset, - * then the tool has already been run and interrupted, and it presumably ran and - * passed sanity checked before it got interrupted. It is _NOT_ safe to run sanity - * check if state is unset because it assumes inodes are to be computed using the - * old inodes/group, but some inode numbers may be updated to the new number. - */ - if (get_fs_fixup_state(fd) == STATE_UNSET) { - verbose = 0; - no_write = 1; - recurse_dir(fd, &root_inode, dirbuf, dirsize, SANITY_CHECK_PASS); - update_superblocks_and_bg_desc(fd, STATE_UNSET); - verbose = v_flag; - no_write = n_flag; - - set_fs_fixup_state(fd, STATE_MARKING_INUMS); - } - - if (get_fs_fixup_state(fd) == STATE_MARKING_INUMS) { - count = 0; /* Reset debugging counter */ - if (!recurse_dir(fd, &root_inode, dirbuf, dirsize, MARK_INODE_NUMS)) { - set_fs_fixup_state(fd, STATE_UPDATING_INUMS); - } - } - - if (get_fs_fixup_state(fd) == STATE_UPDATING_INUMS) { - count = 0; /* Reset debugging counter */ - if (!recurse_dir(fd, &root_inode, dirbuf, dirsize, UPDATE_INODE_NUMS)) { - set_fs_fixup_state(fd, STATE_UPDATING_SB); - } - } - - if (get_fs_fixup_state(fd) == STATE_UPDATING_SB) { - /* set the new inodes/blockgroup number, - * and sets the state back to 0. - */ - if (!update_superblocks_and_bg_desc(fd, STATE_UPDATING_SB)) { - set_fs_fixup_state(fd, STATE_UNSET); - } - } - - close(fd); - free(dirbuf); - - return 0; -} |