2 * Copyright (C) 2010 The Android Open Source Project
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
16 #include "ext4_utils.h"
17 #include "make_ext4fs.h"
18 #include "ext4_extents.h"
20 #include "ext4fixup.h"
22 #include <sparse/sparse.h>
24 #include <sys/types.h>
26 #include <sys/types.h>
34 #if defined(__APPLE__) && defined(__MACH__)
39 /* The inode block count for a file/directory is in units of 512 byte blocks,
40 * _NOT_ the filesystem block size!
42 #define INODE_BLOCK_SIZE 512
44 #define MAX_EXT4_BLOCK_SIZE 4096
46 /* The two modes the recurse_dir() can be in */
47 #define SANITY_CHECK_PASS 1
48 #define MARK_INODE_NUMS 2
49 #define UPDATE_INODE_NUMS 3
51 /* Magic numbers to indicate what state the update process is in */
52 #define MAGIC_STATE_MARKING_INUMS 0x7000151515565512ll
53 #define MAGIC_STATE_UPDATING_INUMS 0x6121131211735123ll
54 #define MAGIC_STATE_UPDATING_SB 0x15e1715151558477ll
56 /* Internal state variables corresponding to the magic numbers */
58 #define STATE_MARKING_INUMS 1
59 #define STATE_UPDATING_INUMS 2
60 #define STATE_UPDATING_SB 3
62 /* Used for automated testing of this programs ability to stop and be restarted wthout error */
63 static int bail_phase = 0;
64 static int bail_loc = 0;
65 static int bail_count = 0;
69 static int verbose = 0;
70 static int no_write = 0;
72 static int new_inodes_per_group = 0;
74 static int no_write_fixup_state = 0;
76 static int compute_new_inum(unsigned int old_inum)
78 unsigned int group, offset;
80 group = (old_inum - 1) / info.inodes_per_group;
81 offset = (old_inum -1) % info.inodes_per_group;
83 return (group * new_inodes_per_group) + offset + 1;
86 /* Function to read the primary superblock */
87 static void read_sb(int fd, struct ext4_super_block *sb)
91 ret = lseek64(fd, 1024, SEEK_SET);
93 critical_error_errno("failed to seek to superblock");
95 ret = read(fd, sb, sizeof(*sb));
97 critical_error_errno("failed to read superblock");
98 if (ret != sizeof(*sb))
99 critical_error("failed to read all of superblock");
102 /* Function to write a primary or backup superblock at a given offset */
103 static void write_sb(int fd, unsigned long long offset, struct ext4_super_block *sb)
111 ret = lseek64(fd, offset, SEEK_SET);
113 critical_error_errno("failed to seek to superblock");
115 ret = write(fd, sb, sizeof(*sb));
117 critical_error_errno("failed to write superblock");
118 if (ret != sizeof(*sb))
119 critical_error("failed to write all of superblock");
122 static int get_fs_fixup_state(int fd)
124 unsigned long long magic;
128 return no_write_fixup_state;
131 lseek64(fd, 0, SEEK_SET);
132 len = read(fd, &magic, sizeof(magic));
133 if (len != sizeof(magic)) {
134 critical_error("cannot read fixup_state\n");
138 case MAGIC_STATE_MARKING_INUMS:
139 ret = STATE_MARKING_INUMS;
141 case MAGIC_STATE_UPDATING_INUMS:
142 ret = STATE_UPDATING_INUMS;
144 case MAGIC_STATE_UPDATING_SB:
145 ret = STATE_UPDATING_SB;
153 static int set_fs_fixup_state(int fd, int state)
155 unsigned long long magic;
156 struct ext4_super_block sb;
160 no_write_fixup_state = state;
165 case STATE_MARKING_INUMS:
166 magic = MAGIC_STATE_MARKING_INUMS;
168 case STATE_UPDATING_INUMS:
169 magic = MAGIC_STATE_UPDATING_INUMS;
171 case STATE_UPDATING_SB:
172 magic = MAGIC_STATE_UPDATING_SB;
180 lseek64(fd, 0, SEEK_SET);
181 len = write(fd, &magic, sizeof(magic));
182 if (len != sizeof(magic)) {
183 critical_error("cannot write fixup_state\n");
188 /* If we are in the process of updating the filesystem, make it unmountable */
191 /* we are done, so make the filesystem mountable again */
192 sb.s_desc_size &= ~1;
194 write_sb(fd, 1024, &sb);
199 static int read_ext(int fd)
202 struct ext4_super_block sb;
206 ext4_parse_sb_info(&sb);
208 if (info.feat_incompat & EXT4_FEATURE_INCOMPAT_RECOVER) {
209 critical_error("Filesystem needs recovery first, mount and unmount to do that\n");
212 /* Clear the low bit which is set while this tool is in progress.
213 * If the tool crashes, it will still be set when we restart.
214 * The low bit is set to make the filesystem unmountable while
215 * it is being fixed up. Also allow 0, which means the old ext2
218 if (((sb.s_desc_size & ~1) != sizeof(struct ext2_group_desc)) &&
219 ((sb.s_desc_size & ~1) != 0))
220 critical_error("error: bg_desc_size != sizeof(struct ext2_group_desc)\n");
222 ret = lseek64(fd, info.len, SEEK_SET);
224 critical_error_errno("failed to seek to end of input image");
226 ret = lseek64(fd, info.block_size * (aux_info.first_data_block + 1), SEEK_SET);
228 critical_error_errno("failed to seek to block group descriptors");
230 ret = read(fd, aux_info.bg_desc, info.block_size * aux_info.bg_desc_blocks);
232 critical_error_errno("failed to read block group descriptors");
233 if (ret != (int)info.block_size * (int)aux_info.bg_desc_blocks)
234 critical_error("failed to read all of block group descriptors");
237 printf("Found filesystem with parameters:\n");
238 printf(" Size: %llu\n", info.len);
239 printf(" Block size: %d\n", info.block_size);
240 printf(" Blocks per group: %d\n", info.blocks_per_group);
241 printf(" Inodes per group: %d\n", info.inodes_per_group);
242 printf(" Inode size: %d\n", info.inode_size);
243 printf(" Label: %s\n", info.label);
244 printf(" Blocks: %llu\n", aux_info.len_blocks);
245 printf(" Block groups: %d\n", aux_info.groups);
246 printf(" Reserved block group size: %d\n", info.bg_desc_reserve_blocks);
247 printf(" Used %d/%d inodes and %d/%d blocks\n",
248 aux_info.sb->s_inodes_count - aux_info.sb->s_free_inodes_count,
249 aux_info.sb->s_inodes_count,
250 aux_info.sb->s_blocks_count_lo - aux_info.sb->s_free_blocks_count_lo,
251 aux_info.sb->s_blocks_count_lo);
257 static int read_inode(int fd, unsigned int inum, struct ext4_inode *inode)
259 unsigned int bg_num, bg_offset;
260 off64_t inode_offset;
263 bg_num = (inum-1) / info.inodes_per_group;
264 bg_offset = (inum-1) % info.inodes_per_group;
266 inode_offset = ((unsigned long long)aux_info.bg_desc[bg_num].bg_inode_table * info.block_size) +
267 (bg_offset * info.inode_size);
269 if (lseek64(fd, inode_offset, SEEK_SET) < 0) {
270 critical_error_errno("failed to seek to inode %d\n", inum);
273 len=read(fd, inode, sizeof(*inode));
274 if (len != sizeof(*inode)) {
275 critical_error_errno("failed to read inode %d\n", inum);
281 static int read_block(int fd, unsigned long long block_num, void *block)
286 off = block_num * info.block_size;
288 if (lseek64(fd, off, SEEK_SET) , 0) {
289 critical_error_errno("failed to seek to block %lld\n", block_num);
292 len=read(fd, block, info.block_size);
293 if (len != info.block_size) {
294 critical_error_errno("failed to read block %lld\n", block_num);
300 static int write_block(int fd, unsigned long long block_num, void *block)
309 off = block_num * info.block_size;
311 if (lseek64(fd, off, SEEK_SET) < 0) {
312 critical_error_errno("failed to seek to block %lld\n", block_num);
315 len=write(fd, block, info.block_size);
316 if (len != info.block_size) {
317 critical_error_errno("failed to write block %lld\n", block_num);
323 static int bitmap_get_bit(u8 *bitmap, u32 bit)
325 if (bitmap[bit / 8] & (1 << (bit % 8)))
331 static void bitmap_clear_bit(u8 *bitmap, u32 bit)
333 bitmap[bit / 8] &= ~(1 << (bit % 8));
338 static void check_inode_bitmap(int fd, unsigned int bg_num)
340 unsigned int inode_bitmap_block_num;
341 unsigned char block[MAX_EXT4_BLOCK_SIZE];
342 int i, bitmap_updated = 0;
344 /* Using the bg_num, aux_info.bg_desc[], info.inodes_per_group and
345 * new_inodes_per_group, retrieve the inode bitmap, and make sure
346 * the bits between the old and new size are clear
348 inode_bitmap_block_num = aux_info.bg_desc[bg_num].bg_inode_bitmap;
350 read_block(fd, inode_bitmap_block_num, block);
352 for (i = info.inodes_per_group; i < new_inodes_per_group; i++) {
353 if (bitmap_get_bit(block, i)) {
354 bitmap_clear_bit(block, i);
359 if (bitmap_updated) {
361 printf("Warning: updated inode bitmap for block group %d\n", bg_num);
363 write_block(fd, inode_bitmap_block_num, block);
369 /* Update the superblock and bgdesc of the specified block group */
370 static int update_superblocks_and_bg_desc(int fd, int state)
373 struct ext4_super_block sb;
374 unsigned int num_block_groups, total_new_inodes;
380 /* Compute how many more inodes are now available */
381 num_block_groups = DIV_ROUND_UP(aux_info.len_blocks, info.blocks_per_group);
382 total_new_inodes = num_block_groups * (new_inodes_per_group - sb.s_inodes_per_group);
385 printf("created %d additional inodes\n", total_new_inodes);
388 /* Update the free inodes count in each block group descriptor */
389 for (i = 0; i < num_block_groups; i++) {
390 if (state == STATE_UPDATING_SB) {
391 aux_info.bg_desc[i].bg_free_inodes_count += (new_inodes_per_group - sb.s_inodes_per_group);
393 check_inode_bitmap(fd, i);
396 /* First some sanity checks */
397 if ((sb.s_inodes_count + total_new_inodes) != (new_inodes_per_group * num_block_groups)) {
398 critical_error("Failed sanity check on new inode count\n");
400 if (new_inodes_per_group % (info.block_size/info.inode_size)) {
401 critical_error("Failed sanity check on new inode per group alignment\n");
404 /* Update the free inodes count in the superblock */
405 sb.s_inodes_count += total_new_inodes;
406 sb.s_free_inodes_count += total_new_inodes;
407 sb.s_inodes_per_group = new_inodes_per_group;
409 for (i = 0; i < aux_info.groups; i++) {
410 if (ext4_bg_has_super_block(i)) {
411 unsigned int sb_offset;
414 /* The first superblock is offset by 1K to leave room for boot sectors */
420 sb.s_block_group_nr = i;
421 /* Don't write out the backup superblocks with the bit set in the s_desc_size
422 * which prevents the filesystem from mounting. The bit for the primary
423 * superblock will be cleared on the final call to set_fs_fixup_state() */
425 sb.s_desc_size &= ~1;
428 write_sb(fd, (unsigned long long)i * info.blocks_per_group * info.block_size + sb_offset, &sb);
430 ret = lseek64(fd, ((unsigned long long)i * info.blocks_per_group * info.block_size) +
431 (info.block_size * (aux_info.first_data_block + 1)), SEEK_SET);
433 critical_error_errno("failed to seek to block group descriptors");
436 ret = write(fd, aux_info.bg_desc, info.block_size * aux_info.bg_desc_blocks);
438 critical_error_errno("failed to write block group descriptors");
439 if (ret != (int)info.block_size * (int)aux_info.bg_desc_blocks)
440 critical_error("failed to write all of block group descriptors");
443 if ((bail_phase == 4) && ((unsigned int)bail_count == i)) {
444 critical_error("bailing at phase 4\n");
452 static int get_direct_blocks(struct ext4_inode *inode, unsigned long long *block_list,
456 unsigned int ret = 0;
457 unsigned int sectors_per_block;
459 sectors_per_block = info.block_size / INODE_BLOCK_SIZE;
460 while ((i < (inode->i_blocks_lo / sectors_per_block)) && (i < EXT4_NDIR_BLOCKS)) {
461 block_list[i] = inode->i_block[i];
467 if ((inode->i_blocks_lo / sectors_per_block) > EXT4_NDIR_BLOCKS) {
474 static int get_indirect_blocks(int fd, struct ext4_inode *inode,
475 unsigned long long *block_list, unsigned int *count)
478 unsigned int *indirect_block;
479 unsigned int sectors_per_block;
481 sectors_per_block = info.block_size / INODE_BLOCK_SIZE;
483 indirect_block = (unsigned int *)malloc(info.block_size);
484 if (indirect_block == 0) {
485 critical_error("failed to allocate memory for indirect_block\n");
488 read_block(fd, inode->i_block[EXT4_NDIR_BLOCKS], indirect_block);
490 for(i = 0; i < (inode->i_blocks_lo / sectors_per_block - EXT4_NDIR_BLOCKS); i++) {
491 block_list[EXT4_NDIR_BLOCKS+i] = indirect_block[i];
496 free(indirect_block);
501 static int get_block_list_indirect(int fd, struct ext4_inode *inode, unsigned long long *block_list)
503 unsigned int count=0;
505 if (get_direct_blocks(inode, block_list, &count)) {
506 get_indirect_blocks(fd, inode, block_list, &count);
512 static int get_extent_ents(struct ext4_extent_header *ext_hdr, unsigned long long *block_list)
515 struct ext4_extent *extent;
516 off64_t fs_block_num;
518 if (ext_hdr->eh_depth != 0) {
519 critical_error("get_extent_ents called with eh_depth != 0\n");
522 /* The extent entries immediately follow the header, so add 1 to the pointer
523 * and cast it to an extent pointer.
525 extent = (struct ext4_extent *)(ext_hdr + 1);
527 for (i = 0; i < ext_hdr->eh_entries; i++) {
528 fs_block_num = ((off64_t)extent->ee_start_hi << 32) | extent->ee_start_lo;
529 for (j = 0; j < extent->ee_len; j++) {
530 block_list[extent->ee_block+j] = fs_block_num+j;
538 static int get_extent_idx(int fd, struct ext4_extent_header *ext_hdr, unsigned long long *block_list)
541 struct ext4_extent_idx *extent_idx;
542 struct ext4_extent_header *tmp_ext_hdr;
543 off64_t fs_block_num;
544 unsigned char block[MAX_EXT4_BLOCK_SIZE];
547 if (ext_hdr->eh_depth == 0) {
548 critical_error("get_extent_idx called with eh_depth == 0\n");
551 /* The extent entries immediately follow the header, so add 1 to the pointer
552 * and cast it to an extent pointer.
554 extent_idx = (struct ext4_extent_idx *)(ext_hdr + 1);
556 for (i = 0; i < ext_hdr->eh_entries; i++) {
557 fs_block_num = ((off64_t)extent_idx->ei_leaf_hi << 32) | extent_idx->ei_leaf_lo;
558 read_block(fd, fs_block_num, block);
559 tmp_ext_hdr = (struct ext4_extent_header *)block;
561 if (tmp_ext_hdr->eh_depth == 0) {
562 get_extent_ents(tmp_ext_hdr, block_list); /* leaf node, fill in block_list */
564 get_extent_idx(fd, tmp_ext_hdr, block_list); /* recurse down the tree */
571 static int get_block_list_extents(int fd, struct ext4_inode *inode, unsigned long long *block_list)
573 struct ext4_extent_header *extent_hdr;
575 extent_hdr = (struct ext4_extent_header *)inode->i_block;
577 if (extent_hdr->eh_magic != EXT4_EXT_MAGIC) {
578 critical_error("extent header has unexpected magic value 0x%4.4x\n",
579 extent_hdr->eh_magic);
582 if (extent_hdr->eh_depth == 0) {
583 get_extent_ents((struct ext4_extent_header *)inode->i_block, block_list);
587 get_extent_idx(fd, (struct ext4_extent_header *)inode->i_block, block_list);
592 static int is_entry_dir(int fd, struct ext4_dir_entry_2 *dirp, int pass)
594 struct ext4_inode inode;
597 if (dirp->file_type == EXT4_FT_DIR) {
599 } else if (dirp->file_type == EXT4_FT_UNKNOWN) {
600 /* Somebody was too lazy to fill in the dir entry,
601 * so we have to go fetch it from the inode. Grrr.
603 /* if UPDATE_INODE_NUMS pass and the inode high bit is not
604 * set return false so we don't recurse down the tree that is
605 * already updated. Otherwise, fetch inode, and return answer.
607 if ((pass == UPDATE_INODE_NUMS) && !(dirp->inode & 0x80000000)) {
610 read_inode(fd, (dirp->inode & 0x7fffffff), &inode);
611 if (S_ISDIR(inode.i_mode)) {
620 static int recurse_dir(int fd, struct ext4_inode *inode, char *dirbuf, int dirsize, int mode)
622 unsigned long long *block_list;
623 unsigned int num_blocks;
624 struct ext4_dir_entry_2 *dirp, *prev_dirp = 0;
626 unsigned int i, leftover_space, is_dir;
627 struct ext4_inode tmp_inode;
632 case SANITY_CHECK_PASS:
633 case MARK_INODE_NUMS:
634 case UPDATE_INODE_NUMS:
637 critical_error("recurse_dir() called witn unknown mode!\n");
640 if (dirsize % info.block_size) {
641 critical_error("dirsize %d not a multiple of block_size %d. This is unexpected!\n",
642 dirsize, info.block_size);
645 num_blocks = dirsize / info.block_size;
647 block_list = malloc((num_blocks + 1) * sizeof(*block_list));
648 if (block_list == 0) {
649 critical_error("failed to allocate memory for block_list\n");
652 if (inode->i_flags & EXT4_EXTENTS_FL) {
653 get_block_list_extents(fd, inode, block_list);
655 /* A directory that requires doubly or triply indirect blocks in huge indeed,
656 * and will almost certainly not exist, especially since make_ext4fs only creates
657 * directories with extents, and the kernel will too, but check to make sure the
658 * directory is not that big and give an error if so. Our limit is 12 direct blocks,
659 * plus block_size/4 singly indirect blocks, which for a filesystem with 4K blocks
660 * is a directory 1036 blocks long, or 4,243,456 bytes long! Assuming an average
661 * filename length of 20 (which I think is generous) thats 20 + 8 bytes overhead
662 * per entry, or 151,552 entries in the directory!
664 if (num_blocks > (info.block_size / 4 + EXT4_NDIR_BLOCKS)) {
665 critical_error("Non-extent based directory is too big!\n");
667 get_block_list_indirect(fd, inode, block_list);
670 /* Read in all the blocks for this directory */
671 for (i = 0; i < num_blocks; i++) {
672 read_block(fd, block_list[i], dirbuf + (i * info.block_size));
675 dirp = (struct ext4_dir_entry_2 *)dirbuf;
676 while (dirp < (struct ext4_dir_entry_2 *)(dirbuf + dirsize)) {
678 leftover_space = (char *)(dirbuf + dirsize) - (char *)dirp;
679 if (((mode == SANITY_CHECK_PASS) || (mode == UPDATE_INODE_NUMS)) &&
680 (leftover_space <= 8) && prev_dirp) {
681 /* This is a bug in an older version of make_ext4fs, where it
682 * didn't properly include the rest of the block in rec_len.
683 * Update rec_len on the previous entry to include the rest of
684 * the block and exit the loop.
687 printf("fixing up short rec_len for diretory entry for %s\n", name);
689 prev_dirp->rec_len += leftover_space;
693 if (dirp->inode == 0) {
694 /* This is the last entry in the directory */
698 strncpy(name, dirp->name, dirp->name_len);
699 name[dirp->name_len]='\0';
701 /* Only recurse on pass UPDATE_INODE_NUMS if the high bit is set.
702 * Otherwise, this inode entry has already been updated
703 * and we'll do the wrong thing. Also don't recurse on . or ..,
704 * and certainly not on non-directories!
706 /* Hrm, looks like filesystems made by fastboot on stingray set the file_type
707 * flag, but the lost+found directory has the type set to Unknown, which
708 * seems to imply I need to read the inode and get it.
710 is_dir = is_entry_dir(fd, dirp, mode);
711 if ( is_dir && (strcmp(name, ".") && strcmp(name, "..")) &&
712 ((mode == SANITY_CHECK_PASS) || (mode == MARK_INODE_NUMS) ||
713 ((mode == UPDATE_INODE_NUMS) && (dirp->inode & 0x80000000))) ) {
714 /* A directory! Recurse! */
715 read_inode(fd, dirp->inode & 0x7fffffff, &tmp_inode);
717 if (!S_ISDIR(tmp_inode.i_mode)) {
718 critical_error("inode %d for name %s does not point to a directory\n",
719 dirp->inode & 0x7fffffff, name);
722 printf("inode %d %s use extents\n", dirp->inode & 0x7fffffff,
723 (tmp_inode.i_flags & EXT4_EXTENTS_FL) ? "does" : "does not");
726 tmp_dirsize = tmp_inode.i_blocks_lo * INODE_BLOCK_SIZE;
728 printf("dir size = %d bytes\n", tmp_dirsize);
731 tmp_dirbuf = malloc(tmp_dirsize);
732 if (tmp_dirbuf == 0) {
733 critical_error("failed to allocate memory for tmp_dirbuf\n");
736 recurse_dir(fd, &tmp_inode, tmp_dirbuf, tmp_dirsize, mode);
743 printf("Directory %s\n", name);
745 printf("Non-directory %s\n", name);
749 /* Process entry based on current mode. Either set high bit or change inode number */
750 if (mode == MARK_INODE_NUMS) {
751 dirp->inode |= 0x80000000;
752 } else if (mode == UPDATE_INODE_NUMS) {
753 if (dirp->inode & 0x80000000) {
754 dirp->inode = compute_new_inum(dirp->inode & 0x7fffffff);
758 if ((bail_phase == mode) && (bail_loc == 1) && (bail_count == count)) {
759 critical_error("Bailing at phase %d, loc 1 and count %d\n", mode, count);
762 /* Point dirp at the next entry */
764 dirp = (struct ext4_dir_entry_2*)((char *)dirp + dirp->rec_len);
767 /* Write out all the blocks for this directory */
768 for (i = 0; i < num_blocks; i++) {
769 write_block(fd, block_list[i], dirbuf + (i * info.block_size));
770 if ((bail_phase == mode) && (bail_loc == 2) && (bail_count <= count)) {
771 critical_error("Bailing at phase %d, loc 2 and count %d\n", mode, count);
780 int ext4fixup(char *fsdev)
782 return ext4fixup_internal(fsdev, 0, 0, 0, 0, 0);
785 int ext4fixup_internal(char *fsdev, int v_flag, int n_flag,
786 int stop_phase, int stop_loc, int stop_count)
789 struct ext4_inode root_inode;
790 unsigned int dirsize;
793 if (setjmp(setjmp_env))
794 return EXIT_FAILURE; /* Handle a call to longjmp() */
799 bail_phase = stop_phase;
801 bail_count = stop_count;
803 fd = open(fsdev, O_RDWR);
806 critical_error_errno("failed to open filesystem image");
810 if ((info.feat_incompat & EXT4_FEATURE_INCOMPAT_FILETYPE) == 0) {
811 critical_error("Expected filesystem to have filetype flag set\n");
814 #if 0 // If we have to fix the directory rec_len issue, we can't use this check
815 /* Check to see if the inodes/group is copacetic */
816 if (info.inodes_per_blockgroup % (info.block_size/info.inode_size) == 0) {
817 /* This filesystem has either already been updated, or was
821 printf("%s: filesystem correct, no work to do\n", me);
827 /* Compute what the new value of inodes_per_blockgroup will be when we're done */
828 new_inodes_per_group=ALIGN(info.inodes_per_group,(info.block_size/info.inode_size));
830 read_inode(fd, EXT4_ROOT_INO, &root_inode);
832 if (!S_ISDIR(root_inode.i_mode)) {
833 critical_error("root inode %d does not point to a directory\n", EXT4_ROOT_INO);
836 printf("inode %d %s use extents\n", EXT4_ROOT_INO,
837 (root_inode.i_flags & EXT4_EXTENTS_FL) ? "does" : "does not");
840 dirsize = root_inode.i_blocks_lo * INODE_BLOCK_SIZE;
842 printf("root dir size = %d bytes\n", dirsize);
845 dirbuf = malloc(dirsize);
847 critical_error("failed to allocate memory for dirbuf\n");
850 /* Perform a sanity check pass first, try to catch any errors that will occur
851 * before we actually change anything, so we don't leave a filesystem in a
852 * corrupted, unrecoverable state. Set no_write, make it quiet, and do a recurse
853 * pass and a update_superblock pass. Set flags back to requested state when done.
854 * Only perform sanity check if the state is unset. If the state is _NOT_ unset,
855 * then the tool has already been run and interrupted, and it presumably ran and
856 * passed sanity checked before it got interrupted. It is _NOT_ safe to run sanity
857 * check if state is unset because it assumes inodes are to be computed using the
858 * old inodes/group, but some inode numbers may be updated to the new number.
860 if (get_fs_fixup_state(fd) == STATE_UNSET) {
863 recurse_dir(fd, &root_inode, dirbuf, dirsize, SANITY_CHECK_PASS);
864 update_superblocks_and_bg_desc(fd, STATE_UNSET);
868 set_fs_fixup_state(fd, STATE_MARKING_INUMS);
871 if (get_fs_fixup_state(fd) == STATE_MARKING_INUMS) {
872 count = 0; /* Reset debugging counter */
873 if (!recurse_dir(fd, &root_inode, dirbuf, dirsize, MARK_INODE_NUMS)) {
874 set_fs_fixup_state(fd, STATE_UPDATING_INUMS);
878 if (get_fs_fixup_state(fd) == STATE_UPDATING_INUMS) {
879 count = 0; /* Reset debugging counter */
880 if (!recurse_dir(fd, &root_inode, dirbuf, dirsize, UPDATE_INODE_NUMS)) {
881 set_fs_fixup_state(fd, STATE_UPDATING_SB);
885 if (get_fs_fixup_state(fd) == STATE_UPDATING_SB) {
886 /* set the new inodes/blockgroup number,
887 * and sets the state back to 0.
889 if (!update_superblocks_and_bg_desc(fd, STATE_UPDATING_SB)) {
890 set_fs_fixup_state(fd, STATE_UNSET);