From bee7b67ce92bb912fccc0dcce3c71c186c2a988b Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sat, 22 Dec 2012 18:50:33 -0500 Subject: debugfs: add the ability to manipulate the extent tree directly This commit adds the functionality which had previously only been in the tst_extents command to debugfs. The debugfs command extent_open will open extent tree of a particular inode, and enables a series of commands which will allow the user to interact with the extent tree directly. Once the extent tree is closed via extent_open(), these additional commands will be disabled again. This commit exports two new functions from lib/ext2fs/extent.c which had previously been statically defined: ext2fs_extent_node_split() and ext2fs_extent_goto2(). Signed-off-by: "Theodore Ts'o" --- lib/ext2fs/Makefile.in | 18 +- lib/ext2fs/ext2fs.h | 3 + lib/ext2fs/extent.c | 489 ++--------------------------------------------- lib/ext2fs/extent_dbg.ct | 77 -------- 4 files changed, 27 insertions(+), 560 deletions(-) delete mode 100644 lib/ext2fs/extent_dbg.ct (limited to 'lib') diff --git a/lib/ext2fs/Makefile.in b/lib/ext2fs/Makefile.in index 0aaa6d6b..8eb2f7cc 100644 --- a/lib/ext2fs/Makefile.in +++ b/lib/ext2fs/Makefile.in @@ -292,17 +292,25 @@ extent_dbg.c: $(srcdir)/extent_dbg.ct $(Q) $(MK_CMDS) $(srcdir)/extent_dbg.ct debug_cmds.c debug_cmds.h: $(top_srcdir)/debugfs/debug_cmds.ct - $(E) " MK_CMDS $<@" + $(E) " MK_CMDS $<" $(Q) $(MK_CMDS) $(top_srcdir)/debugfs/debug_cmds.ct +extent_cmds.c extent_cmds.h: $(top_srcdir)/debugfs/extent_cmds.ct + $(E) " MK_CMDS $<" + $(Q) $(MK_CMDS) $(top_srcdir)/debugfs/extent_cmds.ct + DEBUG_OBJS= debug_cmds.o debugfs.o util.o ncheck.o icheck.o ls.o \ lsdel.o dump.o set_fields.o logdump.o htree.o unused.o \ - e2freefrag.o filefrag.o + e2freefrag.o filefrag.o extent_inode.o extent_cmds.o debugfs.o: $(top_srcdir)/debugfs/debugfs.c $(E) " CC $<" $(Q) $(CC) $(ALL_CFLAGS) -c $< -o $@ +extent_inode.o: $(top_srcdir)/debugfs/extent_inode.c + $(E) " CC $<" + $(Q) $(CC) $(ALL_CFLAGS) -c $< -o $@ + util.o: $(top_srcdir)/debugfs/util.c $(E) " CC $<" $(Q) $(CC) $(ALL_CFLAGS) -c $< -o $@ @@ -361,10 +369,10 @@ tst_bitmaps: tst_bitmaps.o tst_bitmaps_cmd.o $(STATIC_LIBEXT2FS) $(DEPLIBSS) \ $(Q) $(CC) -o $@ tst_bitmaps.o tst_bitmaps_cmd.o $(ALL_CFLAGS) \ $(STATIC_LIBEXT2FS) $(LIBSS) $(STATIC_LIBCOM_ERR) -tst_extents: $(srcdir)/extent.c extent_dbg.c $(DEBUG_OBJS) $(DEPLIBSS) \ +tst_extents: $(srcdir)/extent.c $(DEBUG_OBJS) $(DEPLIBSS) \ $(LIBE2P) $(DEPLIBUUID) $(DEPLIBBLKID) $(DEPSTATIC_LIBCOM_ERR) $(E) " LD $@" - $(Q) $(CC) -o tst_extents $(srcdir)/extent.c extent_dbg.c \ + $(Q) $(CC) -o tst_extents $(srcdir)/extent.c \ $(ALL_CFLAGS) -DDEBUG $(DEBUG_OBJS) $(LIBSS) $(LIBE2P) \ $(STATIC_LIBEXT2FS) $(LIBBLKID) $(LIBUUID) $(STATIC_LIBCOM_ERR) \ -I $(top_srcdir)/debugfs @@ -446,7 +454,7 @@ clean:: tst_byteswap tst_ismounted tst_getsize tst_sectgetsize \ tst_bitops tst_types tst_icount tst_super_size tst_csum \ tst_bitmaps tst_bitmaps_out tst_bitmaps_cmd.c \ - ext2_tdbtool mkjournal debug_cmds.c \ + ext2_tdbtool mkjournal debug_cmds.c extent_cmds.c \ ../libext2fs.a ../libext2fs_p.a ../libext2fs_chk.a \ crc32c_table.h gen_crc32ctable tst_crc32c diff --git a/lib/ext2fs/ext2fs.h b/lib/ext2fs/ext2fs.h index 1b35ff78..a06f57ee 100644 --- a/lib/ext2fs/ext2fs.h +++ b/lib/ext2fs/ext2fs.h @@ -1070,6 +1070,7 @@ extern errcode_t ext2fs_extent_open2(ext2_filsys fs, ext2_ino_t ino, extern void ext2fs_extent_free(ext2_extent_handle_t handle); extern errcode_t ext2fs_extent_get(ext2_extent_handle_t handle, int flags, struct ext2fs_extent *extent); +extern errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle); extern errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, int flags, struct ext2fs_extent *extent); extern errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags, @@ -1082,6 +1083,8 @@ extern errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle, struct ext2_extent_info *info); extern errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle, blk64_t blk); +extern errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle, + int leaf_level, blk64_t blk); extern errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle); /* fileio.c */ diff --git a/lib/ext2fs/extent.c b/lib/ext2fs/extent.c index c6716bc8..4d6af883 100644 --- a/lib/ext2fs/extent.c +++ b/lib/ext2fs/extent.c @@ -604,8 +604,8 @@ errcode_t ext2fs_extent_free_path(ext2_extent_path_t path) * If "blk" has no mapping (hole) then handle is left at last * extent before blk. */ -static errcode_t extent_goto(ext2_extent_handle_t handle, - int leaf_level, blk64_t blk) +errcode_t ext2fs_extent_goto2(ext2_extent_handle_t handle, + int leaf_level, blk64_t blk) { struct ext2fs_extent extent; errcode_t retval; @@ -694,7 +694,7 @@ static errcode_t extent_goto(ext2_extent_handle_t handle, errcode_t ext2fs_extent_goto(ext2_extent_handle_t handle, blk64_t blk) { - return extent_goto(handle, 0, blk); + return ext2fs_extent_goto2(handle, 0, blk); } /* @@ -756,7 +756,7 @@ errcode_t ext2fs_extent_fix_parents(ext2_extent_handle_t handle) } /* put handle back to where we started */ - retval = extent_goto(handle, orig_height, start); + retval = ext2fs_extent_goto2(handle, orig_height, start); done: return retval; } @@ -819,7 +819,7 @@ errcode_t ext2fs_extent_replace(ext2_extent_handle_t handle, * * handle will be left pointing at original record. */ -static errcode_t extent_node_split(ext2_extent_handle_t handle) +errcode_t ext2fs_extent_node_split(ext2_extent_handle_t handle) { errcode_t retval = 0; blk64_t new_node_pblk; @@ -874,12 +874,12 @@ static errcode_t extent_node_split(ext2_extent_handle_t handle) goto done; goal_blk = extent.e_pblk; - retval = extent_node_split(handle); + retval = ext2fs_extent_node_split(handle); if (retval) goto done; /* get handle back to our original split position */ - retval = extent_goto(handle, orig_height, orig_lblk); + retval = ext2fs_extent_goto2(handle, orig_height, orig_lblk); if (retval) goto done; } @@ -1028,7 +1028,7 @@ static errcode_t extent_node_split(ext2_extent_handle_t handle) } /* get handle back to our original position */ - retval = extent_goto(handle, orig_height, orig_lblk); + retval = ext2fs_extent_goto2(handle, orig_height, orig_lblk); if (retval) goto done; @@ -1079,7 +1079,7 @@ errcode_t ext2fs_extent_insert(ext2_extent_handle_t handle, int flags, printf("node full (level %d) - splitting\n", handle->level); #endif - retval = extent_node_split(handle); + retval = ext2fs_extent_node_split(handle); if (retval) return retval; path = handle->path + handle->level; @@ -1447,7 +1447,7 @@ done: /* get handle back to its position */ if (orig_height > handle->max_depth) orig_height = handle->max_depth; /* In case we shortened the tree */ - extent_goto(handle, orig_height, orig_lblk); + ext2fs_extent_goto2(handle, orig_height, orig_lblk); return retval; } @@ -1559,477 +1559,10 @@ errcode_t ext2fs_extent_get_info(ext2_extent_handle_t handle, } #ifdef DEBUG - -#include "ss/ss.h" - -#include "debugfs.h" - /* - * Hook in new commands into debugfs + * Override debugfs's prompt */ const char *debug_prog_name = "tst_extents"; -extern ss_request_table extent_cmds; -ss_request_table *extra_cmds = &extent_cmds; - -ext2_ino_t current_ino = 0; -ext2_extent_handle_t current_handle; - -int common_extent_args_process(int argc, char *argv[], int min_argc, - int max_argc, const char *cmd, - const char *usage, int flags) -{ - if (common_args_process(argc, argv, min_argc, max_argc, cmd, - usage, flags)) - return 1; - - if (!current_handle) { - com_err(cmd, 0, "Extent handle not open"); - return 1; - } - return 0; -} - -void do_inode(int argc, char *argv[]) -{ - ext2_ino_t inode; - int i; - struct ext3_extent_header *eh; - errcode_t retval; - - if (check_fs_open(argv[0])) - return; - - if (argc == 1) { - if (current_ino) - printf("Current inode is %d\n", current_ino); - else - printf("No current inode\n"); - return; - } - - if (common_inode_args_process(argc, argv, &inode, 0)) { - return; - } - - current_ino = 0; - - retval = ext2fs_extent_open(current_fs, inode, ¤t_handle); - if (retval) { - com_err(argv[1], retval, "while opening extent handle"); - return; - } - - current_ino = inode; - - printf("Loaded inode %d\n", current_ino); - - return; -} - -void generic_goto_node(char *cmd_name, int op) -{ - struct ext2fs_extent extent; - errcode_t retval; - - if (check_fs_open(cmd_name)) - return; - - if (!current_handle) { - com_err(cmd_name, 0, "Extent handle not open"); - return; - } - - retval = ext2fs_extent_get(current_handle, op, &extent); - if (retval) { - com_err(cmd_name, retval, 0); - return; - } - dbg_print_extent(0, &extent); -} - -void do_current_node(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_CURRENT); -} - -void do_root_node(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_ROOT); -} - -void do_last_leaf(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_LAST_LEAF); -} - -void do_first_sib(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_FIRST_SIB); -} - -void do_last_sib(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_LAST_SIB); -} - -void do_next_sib(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_NEXT_SIB); -} - -void do_prev_sib(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_PREV_SIB); -} - -void do_next_leaf(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_NEXT_LEAF); -} - -void do_prev_leaf(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_PREV_LEAF); -} - -void do_next(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_NEXT); -} - -void do_prev(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_PREV); -} - -void do_up(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_UP); -} - -void do_down(int argc, char *argv[]) -{ - generic_goto_node(argv[0], EXT2_EXTENT_DOWN); -} - -void do_delete_node(int argc, char *argv[]) -{ - errcode_t retval; - int err; - - if (common_extent_args_process(argc, argv, 1, 1, "delete_node", - "", CHECK_FS_RW | CHECK_FS_BITMAPS)) - return; - - retval = ext2fs_extent_delete(current_handle, 0); - if (retval) { - com_err(argv[0], retval, 0); - return; - } - if (current_handle->path && current_handle->path[0].curr) - do_current_node(argc, argv); -} - -void do_replace_node(int argc, char *argv[]) -{ - const char *usage = "[--uninit] "; - errcode_t retval; - struct ext2fs_extent extent; - int err; - - if (common_extent_args_process(argc, argv, 3, 5, "replace_node", - usage, CHECK_FS_RW | CHECK_FS_BITMAPS)) - return; - - extent.e_flags = 0; - - if (!strcmp(argv[1], "--uninit")) { - argc--; - argv++; - extent.e_flags |= EXT2_EXTENT_FLAGS_UNINIT; - } - - if (argc != 4) { - fprintf(stderr, "Usage: %s %s\n", argv[0], usage); - return; - } - - extent.e_lblk = parse_ulong(argv[1], argv[0], "logical block", &err); - if (err) - return; - - extent.e_len = parse_ulong(argv[2], argv[0], "logical block", &err); - if (err) - return; - - extent.e_pblk = parse_ulong(argv[3], argv[0], "logical block", &err); - if (err) - return; - - retval = ext2fs_extent_replace(current_handle, 0, &extent); - if (retval) { - com_err(argv[0], retval, 0); - return; - } - do_current_node(argc, argv); -} - -void do_split_node(int argc, char *argv[]) -{ - errcode_t retval; - struct ext2fs_extent extent; - int err; - - if (common_extent_args_process(argc, argv, 1, 1, "split_node", - "", CHECK_FS_RW | CHECK_FS_BITMAPS)) - return; - retval = extent_node_split(current_handle); - if (retval) { - com_err(argv[0], retval, 0); - return; - } - do_current_node(argc, argv); -} - -void do_insert_node(int argc, char *argv[]) -{ - const char *usage = "[--after] [--uninit] "; - errcode_t retval; - struct ext2fs_extent extent; - char *cmd; - int err; - int flags = 0; - - if (common_extent_args_process(argc, argv, 3, 6, "insert_node", - usage, CHECK_FS_RW | CHECK_FS_BITMAPS)) - return; - - cmd = argv[0]; - - extent.e_flags = 0; - - while (argc > 2) { - if (!strcmp(argv[1], "--after")) { - argc--; - argv++; - flags |= EXT2_EXTENT_INSERT_AFTER; - continue; - } - if (!strcmp(argv[1], "--uninit")) { - argc--; - argv++; - extent.e_flags |= EXT2_EXTENT_FLAGS_UNINIT; - continue; - } - break; - } - - if (argc != 4) { - fprintf(stderr, "usage: %s %s\n", cmd, usage); - return; - } - - extent.e_lblk = parse_ulong(argv[1], cmd, - "logical block", &err); - if (err) - return; - - extent.e_len = parse_ulong(argv[2], cmd, - "length", &err); - if (err) - return; - - extent.e_pblk = parse_ulong(argv[3], cmd, - "pysical block", &err); - if (err) - return; - - retval = ext2fs_extent_insert(current_handle, flags, &extent); - if (retval) { - com_err(cmd, retval, 0); - return; - } - do_current_node(argc, argv); -} - -void do_set_bmap(int argc, char **argv) -{ - const char *usage = "[--uninit] "; - errcode_t retval; - blk_t logical; - blk_t physical; - char *cmd = argv[0]; - int flags = 0; - int err; - - if (common_extent_args_process(argc, argv, 3, 5, "set_bmap", - usage, CHECK_FS_RW | CHECK_FS_BITMAPS)) - return; - - if (argc > 2 && !strcmp(argv[1], "--uninit")) { - argc--; - argv++; - flags |= EXT2_EXTENT_SET_BMAP_UNINIT; - } - - if (argc != 3) { - fprintf(stderr, "Usage: %s %s\n", cmd, usage); - return; - } - - logical = parse_ulong(argv[1], cmd, - "logical block", &err); - if (err) - return; - - physical = parse_ulong(argv[2], cmd, - "physical block", &err); - if (err) - return; - - retval = ext2fs_extent_set_bmap(current_handle, logical, - (blk64_t) physical, flags); - if (retval) { - com_err(cmd, retval, 0); - return; - } - if (current_handle->path && current_handle->path[0].curr) - do_current_node(argc, argv); -} - -void do_print_all(int argc, char **argv) -{ - const char *usage = "[--leaf-only|--reverse|--reverse-leaf]"; - struct ext2fs_extent extent; - errcode_t retval; - errcode_t end_err = EXT2_ET_EXTENT_NO_NEXT; - int op = EXT2_EXTENT_NEXT; - int first_op = EXT2_EXTENT_ROOT; - - - if (common_extent_args_process(argc, argv, 1, 2, "print_all", - usage, 0)) - return; - - if (argc == 2) { - if (!strcmp(argv[1], "--leaf-only")) - op = EXT2_EXTENT_NEXT_LEAF; - else if (!strcmp(argv[1], "--reverse")) { - op = EXT2_EXTENT_PREV; - first_op = EXT2_EXTENT_LAST_LEAF; - end_err = EXT2_ET_EXTENT_NO_PREV; - } else if (!strcmp(argv[1], "--reverse-leaf")) { - op = EXT2_EXTENT_PREV_LEAF; - first_op = EXT2_EXTENT_LAST_LEAF; - end_err = EXT2_ET_EXTENT_NO_PREV; - } else { - fprintf(stderr, "Usage: %s %s\n", argv[0], usage); - return; - } - } - - retval = ext2fs_extent_get(current_handle, first_op, &extent); - if (retval) { - com_err(argv[0], retval, 0); - return; - } - dbg_print_extent(0, &extent); - - while (1) { - retval = ext2fs_extent_get(current_handle, op, &extent); - if (retval == end_err) - break; - - if (retval) { - com_err(argv[0], retval, 0); - return; - } - dbg_print_extent(0, &extent); - } -} - -void do_fix_parents(int argc, char **argv) -{ - struct ext2fs_extent extent; - struct ext2_extent_info info; - errcode_t retval; - - if (common_extent_args_process(argc, argv, 1, 1, "fix_parents", "", - CHECK_FS_RW)) - return; - - retval = ext2fs_extent_fix_parents(current_handle); - if (retval) { - com_err(argv[0], retval, 0); - return; - } -} - -void do_info(int argc, char **argv) -{ - struct ext2fs_extent extent; - struct ext2_extent_info info; - errcode_t retval; - - if (common_extent_args_process(argc, argv, 1, 1, "info", "", 0)) - return; - - retval = ext2fs_extent_get_info(current_handle, &info); - if (retval) { - com_err(argv[0], retval, 0); - return; - } - - retval = ext2fs_extent_get(current_handle, - EXT2_EXTENT_CURRENT, &extent); - if (retval) { - com_err(argv[0], retval, 0); - return; - } - - dbg_print_extent(0, &extent); - - printf("Current handle location: %d/%d (max: %d, bytes %d), level %d/%d\n", - info.curr_entry, info.num_entries, info.max_entries, - info.bytes_avail, info.curr_level, info.max_depth); - printf("\tmax lblk: %llu, max pblk: %llu\n", info.max_lblk, - info.max_pblk); - printf("\tmax_len: %u, max_uninit_len: %u\n", info.max_len, - info.max_uninit_len); -} - -void do_goto_block(int argc, char **argv) -{ - struct ext2fs_extent extent; - errcode_t retval; - int op = EXT2_EXTENT_NEXT_LEAF; - blk64_t blk; - int level = 0, err; - - if (common_extent_args_process(argc, argv, 2, 3, "goto_block", - "block [level]", 0)) - return; - - if (strtoblk(argv[0], argv[1], &blk)) - return; - - if (argc == 3) { - level = parse_ulong(argv[2], argv[0], "level", &err); - if (err) - return; - } - - retval = extent_goto(current_handle, level, (blk64_t) blk); - - if (retval) { - com_err(argv[0], retval, - "while trying to go to block %llu, level %d", - (unsigned long long) blk, level); - return; - } - - generic_goto_node(argv[0], EXT2_EXTENT_CURRENT); -} #endif diff --git a/lib/ext2fs/extent_dbg.ct b/lib/ext2fs/extent_dbg.ct deleted file mode 100644 index c1d8033b..00000000 --- a/lib/ext2fs/extent_dbg.ct +++ /dev/null @@ -1,77 +0,0 @@ -# -# Copyright (C) 1993 Theodore Ts'o. This file may be redistributed -# under the terms of the GNU Public License. -# -command_table extent_cmds; - -request do_inode, "Open an inode", - inode; - -request do_current_node, "Current extent node", - current_node, current; - -request do_root_node, "Goto root extent", - root_node, root; - -request do_last_leaf, "Goto last leaf", - last_leaf; - -request do_first_sib, "Goto first sibling", - first_sibling, first_sib; - -request do_last_sib, "Goto last sibling", - last_sibling, last_sib; - -request do_next_sib, "Goto next sibling", - next_sibling, next_sib, ns; - -request do_prev_sib, "Goto previous sibling", - prev_sibling, prev_sib, ps; - -request do_next_leaf, "Goto next leaf", - next_leaf, nl; - -request do_prev_leaf, "Goto previous leaf", - prev_leaf, pl; - -request do_next, "Goto next node", - next, n; - -request do_prev, "Goto previous node", - previous, prev, p; - -request do_up, "Up node", - up_node, up, u; - -request do_down, "Down node", - down_node, down, d; - -request do_delete_node, "Delete node", - delete_node, delete; - -request do_insert_node, "Insert node", - insert_node, insert; - -request do_split_node, "Split node", - split_node, split; - -request do_fix_parents, "Fix parents", - fix_parents, fixp; - -request do_set_bmap, "Set block mapping", - set_bmap; - -request do_replace_node, "Insert node", - replace_node, replace; - -request do_print_all, "Iterate over all nodes and print them", - print_all, all; - -request do_goto_block, "Goto extent containing specified block", - goto_block, goto; - -request do_info, "Print extent info", - info; - -end; - -- cgit v1.2.3