2 * e2fsck.c - superblock checks
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o.
7 * This file may be redistributed under the terms of the GNU Public
17 #ifndef EXT2_SKIP_UUID
18 #include "uuid/uuid.h"
27 static int check_super_value(e2fsck_t ctx
, const char *descr
,
28 unsigned long value
, int flags
,
29 unsigned long min_val
, unsigned long max_val
)
31 struct problem_context pctx
;
33 if ((flags
& MIN_CHECK
&& value
< min_val
) ||
34 (flags
& MAX_CHECK
&& value
> max_val
) ||
35 (flags
& LOG2_CHECK
&& (value
& (value
- 1)) != 0)) {
36 clear_problem_context(&pctx
);
39 fix_problem(ctx
, PR_0_MISC_CORRUPT_SUPER
, &pctx
);
40 ctx
->flags
|= E2F_FLAG_ABORT
;
46 static int check_super_value64(e2fsck_t ctx
, const char *descr
,
47 __u64 value
, int flags
,
48 __u64 min_val
, __u64 max_val
)
50 struct problem_context pctx
;
52 if ((flags
& MIN_CHECK
&& value
< min_val
) ||
53 (flags
& MAX_CHECK
&& value
> max_val
) ||
54 (flags
& LOG2_CHECK
&& (value
& (value
- 1)) != 0)) {
55 clear_problem_context(&pctx
);
58 fix_problem(ctx
, PR_0_MISC_CORRUPT_SUPER
, &pctx
);
59 ctx
->flags
|= E2F_FLAG_ABORT
;
66 * helper function to release an inode
68 struct process_block_struct
{
71 struct problem_context
*pctx
;
74 e2_blkcnt_t truncate_block
;
79 struct ext2_inode_large
*inode
;
82 static int release_inode_block(ext2_filsys fs
,
85 blk64_t ref_blk
EXT2FS_ATTR((unused
)),
86 int ref_offset
EXT2FS_ATTR((unused
)),
89 struct process_block_struct
*pb
;
91 struct problem_context
*pctx
;
92 blk64_t blk
= *block_nr
;
93 blk64_t cluster
= EXT2FS_B2C(fs
, *block_nr
);
96 pb
= (struct process_block_struct
*) priv_data
;
101 pctx
->blkcount
= blockcnt
;
106 if (pb
->last_cluster
== cluster
)
109 pb
->last_cluster
= cluster
;
111 if ((blk
< fs
->super
->s_first_data_block
) ||
112 (blk
>= ext2fs_blocks_count(fs
->super
))) {
113 fix_problem(ctx
, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM
, pctx
);
119 if (!ext2fs_test_block_bitmap2(fs
->block_map
, blk
)) {
120 fix_problem(ctx
, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK
, pctx
);
125 * If we are deleting an orphan, then we leave the fields alone.
126 * If we are truncating an orphan, then update the inode fields
127 * and clean up any partial block data.
129 if (pb
->truncating
) {
131 * We only remove indirect blocks if they are
138 pb
->errcode
= io_channel_read_blk64(fs
->io
, blk
, 1,
143 limit
= fs
->blocksize
>> 2;
144 for (i
= 0, bp
= (blk_t
*) pb
->buf
;
145 i
< limit
; i
++, bp
++)
150 * We don't remove direct blocks until we've reached
151 * the truncation block.
153 if (blockcnt
>= 0 && blockcnt
< pb
->truncate_block
)
156 * If part of the last block needs truncating, we do
159 if ((blockcnt
== pb
->truncate_block
) && pb
->truncate_offset
) {
160 pb
->errcode
= io_channel_read_blk64(fs
->io
, blk
, 1,
164 memset(pb
->buf
+ pb
->truncate_offset
, 0,
165 fs
->blocksize
- pb
->truncate_offset
);
166 pb
->errcode
= io_channel_write_blk64(fs
->io
, blk
, 1,
171 pb
->truncated_blocks
++;
173 retval
|= BLOCK_CHANGED
;
177 quota_data_sub(ctx
->qctx
, pb
->inode
, 0, ctx
->fs
->blocksize
);
178 ext2fs_block_alloc_stats2(fs
, blk
, -1);
184 * This function releases an inode. Returns 1 if an inconsistency was
185 * found. If the inode has a link count, then it is being truncated and
188 static int release_inode_blocks(e2fsck_t ctx
, ext2_ino_t ino
,
189 struct ext2_inode_large
*inode
, char *block_buf
,
190 struct problem_context
*pctx
)
192 struct process_block_struct pb
;
193 ext2_filsys fs
= ctx
->fs
;
198 if (!ext2fs_inode_has_valid_blocks2(fs
, EXT2_INODE(inode
)))
201 pb
.buf
= block_buf
+ 3 * ctx
->fs
->blocksize
;
208 if (inode
->i_links_count
) {
210 pb
.truncate_block
= (e2_blkcnt_t
)
211 ((EXT2_I_SIZE(inode
) + fs
->blocksize
- 1) /
213 pb
.truncate_offset
= inode
->i_size
% fs
->blocksize
;
216 pb
.truncate_block
= 0;
217 pb
.truncate_offset
= 0;
219 pb
.truncated_blocks
= 0;
220 retval
= ext2fs_block_iterate3(fs
, ino
, BLOCK_FLAG_DEPTH_TRAVERSE
,
221 block_buf
, release_inode_block
, &pb
);
223 com_err("release_inode_blocks", retval
,
224 _("while calling ext2fs_block_iterate for inode %u"),
231 /* Refresh the inode since ext2fs_block_iterate may have changed it */
232 e2fsck_read_inode_full(ctx
, ino
, EXT2_INODE(inode
), sizeof(*inode
),
233 "release_inode_blocks");
235 if (pb
.truncated_blocks
)
236 ext2fs_iblk_sub_blocks(fs
, EXT2_INODE(inode
),
237 pb
.truncated_blocks
);
239 blk
= ext2fs_file_acl_block(fs
, EXT2_INODE(inode
));
241 retval
= ext2fs_adjust_ea_refcount3(fs
, blk
, block_buf
, -1,
243 if (retval
== EXT2_ET_BAD_EA_BLOCK_NUM
) {
248 com_err("release_inode_blocks", retval
,
249 _("while calling ext2fs_adjust_ea_refcount2 for inode %u"),
255 quota_data_sub(ctx
->qctx
, inode
, 0,
257 ext2fs_block_alloc_stats2(fs
, blk
, -1);
260 ext2fs_file_acl_block_set(fs
, EXT2_INODE(inode
), 0);
265 /* Load all quota data in preparation for orphan clearing. */
266 static errcode_t
e2fsck_read_all_quotas(e2fsck_t ctx
)
269 enum quota_type qtype
;
270 errcode_t retval
= 0;
272 if (!ext2fs_has_feature_quota(ctx
->fs
->super
))
275 retval
= quota_init_context(&ctx
->qctx
, ctx
->fs
, 0);
279 for (qtype
= 0 ; qtype
< MAXQUOTAS
; qtype
++) {
280 qf_ino
= *quota_sb_inump(ctx
->fs
->super
, qtype
);
284 retval
= quota_update_limits(ctx
->qctx
, qf_ino
, qtype
);
289 quota_release_context(&ctx
->qctx
);
293 /* Write all the quota info to disk. */
294 static errcode_t
e2fsck_write_all_quotas(e2fsck_t ctx
)
296 struct problem_context pctx
;
297 enum quota_type qtype
;
299 if (!ext2fs_has_feature_quota(ctx
->fs
->super
))
302 clear_problem_context(&pctx
);
303 for (qtype
= 0 ; qtype
< MAXQUOTAS
; qtype
++) {
305 pctx
.errcode
= quota_write_inode(ctx
->qctx
, 1 << qtype
);
307 fix_problem(ctx
, PR_6_WRITE_QUOTAS
, &pctx
);
312 quota_release_context(&ctx
->qctx
);
317 * This function releases all of the orphan inodes. It returns 1 if
318 * it hit some error, and 0 on success.
320 static int release_orphan_inodes(e2fsck_t ctx
)
322 ext2_filsys fs
= ctx
->fs
;
323 ext2_ino_t ino
, next_ino
;
324 struct ext2_inode_large inode
;
325 struct problem_context pctx
;
328 if ((ino
= fs
->super
->s_last_orphan
) == 0)
331 clear_problem_context(&pctx
);
332 pctx
.errcode
= e2fsck_read_all_quotas(ctx
);
334 fix_problem(ctx
, PR_0_QUOTA_INIT_CTX
, &pctx
);
339 * Win or lose, we won't be using the head of the orphan inode
342 fs
->super
->s_last_orphan
= 0;
343 ext2fs_mark_super_dirty(fs
);
346 * If the filesystem contains errors, don't run the orphan
347 * list, since the orphan list can't be trusted; and we're
348 * going to be running a full e2fsck run anyway...
350 if (fs
->super
->s_state
& EXT2_ERROR_FS
) {
352 quota_release_context(&ctx
->qctx
);
356 if ((ino
< EXT2_FIRST_INODE(fs
->super
)) ||
357 (ino
> fs
->super
->s_inodes_count
)) {
358 clear_problem_context(&pctx
);
360 fix_problem(ctx
, PR_0_ORPHAN_ILLEGAL_HEAD_INODE
, &pctx
);
364 block_buf
= (char *) e2fsck_allocate_memory(ctx
, fs
->blocksize
* 4,
365 "block iterate buffer");
366 e2fsck_read_bitmaps(ctx
);
369 e2fsck_read_inode_full(ctx
, ino
, EXT2_INODE(&inode
),
370 sizeof(inode
), "release_orphan_inodes");
371 clear_problem_context(&pctx
);
373 pctx
.inode
= EXT2_INODE(&inode
);
374 pctx
.str
= inode
.i_links_count
? _("Truncating") :
377 fix_problem(ctx
, PR_0_ORPHAN_CLEAR_INODE
, &pctx
);
379 next_ino
= inode
.i_dtime
;
381 ((next_ino
< EXT2_FIRST_INODE(fs
->super
)) ||
382 (next_ino
> fs
->super
->s_inodes_count
))) {
384 fix_problem(ctx
, PR_0_ORPHAN_ILLEGAL_INODE
, &pctx
);
388 if (release_inode_blocks(ctx
, ino
, &inode
, block_buf
, &pctx
))
391 if (!inode
.i_links_count
) {
393 quota_data_inodes(ctx
->qctx
, &inode
, ino
, -1);
394 ext2fs_inode_alloc_stats2(fs
, ino
, -1,
395 LINUX_S_ISDIR(inode
.i_mode
));
397 inode
.i_dtime
= ctx
->now
;
401 e2fsck_write_inode_full(ctx
, ino
, EXT2_INODE(&inode
),
402 sizeof(inode
), "delete_file");
405 ext2fs_free_mem(&block_buf
);
406 pctx
.errcode
= e2fsck_write_all_quotas(ctx
);
411 ext2fs_free_mem(&block_buf
);
414 quota_release_context(&ctx
->qctx
);
420 * Check the resize inode to make sure it is sane. We check both for
421 * the case where on-line resizing is not enabled (in which case the
422 * resize inode should be cleared) as well as the case where on-line
423 * resizing is enabled.
425 void check_resize_inode(e2fsck_t ctx
)
427 ext2_filsys fs
= ctx
->fs
;
428 struct ext2_inode inode
;
429 struct problem_context pctx
;
430 int i
, gdt_off
, ind_off
;
433 blk_t expect
; /* for resize inode, which is 32-bit only */
434 __u32
*dind_buf
= 0, *ind_buf
;
437 clear_problem_context(&pctx
);
440 * If the resize inode feature isn't set, then
441 * s_reserved_gdt_blocks must be zero.
443 if (!ext2fs_has_feature_resize_inode(fs
->super
)) {
444 if (fs
->super
->s_reserved_gdt_blocks
) {
445 pctx
.num
= fs
->super
->s_reserved_gdt_blocks
;
446 if (fix_problem(ctx
, PR_0_NONZERO_RESERVED_GDT_BLOCKS
,
448 fs
->super
->s_reserved_gdt_blocks
= 0;
449 ext2fs_mark_super_dirty(fs
);
454 /* Read the resize inode */
455 pctx
.ino
= EXT2_RESIZE_INO
;
456 retval
= ext2fs_read_inode(fs
, EXT2_RESIZE_INO
, &inode
);
458 if (ext2fs_has_feature_resize_inode(fs
->super
))
459 ctx
->flags
|= E2F_FLAG_RESIZE_INODE
;
464 * If the resize inode feature isn't set, check to make sure
465 * the resize inode is cleared; then we're done.
467 if (!ext2fs_has_feature_resize_inode(fs
->super
)) {
468 for (i
=0; i
< EXT2_N_BLOCKS
; i
++) {
469 if (inode
.i_block
[i
])
472 if ((i
< EXT2_N_BLOCKS
) &&
473 fix_problem(ctx
, PR_0_CLEAR_RESIZE_INODE
, &pctx
)) {
474 memset(&inode
, 0, sizeof(inode
));
475 e2fsck_write_inode(ctx
, EXT2_RESIZE_INO
, &inode
,
482 * The resize inode feature is enabled; check to make sure the
483 * only block in use is the double indirect block
485 blk
= inode
.i_block
[EXT2_DIND_BLOCK
];
486 for (i
=0; i
< EXT2_N_BLOCKS
; i
++) {
487 if (i
!= EXT2_DIND_BLOCK
&& inode
.i_block
[i
])
490 if ((i
< EXT2_N_BLOCKS
) || !blk
|| !inode
.i_links_count
||
491 !(inode
.i_mode
& LINUX_S_IFREG
) ||
492 (blk
< fs
->super
->s_first_data_block
||
493 blk
>= ext2fs_blocks_count(fs
->super
))) {
494 resize_inode_invalid
:
495 if (fix_problem(ctx
, PR_0_RESIZE_INODE_INVALID
, &pctx
)) {
496 memset(&inode
, 0, sizeof(inode
));
497 e2fsck_write_inode(ctx
, EXT2_RESIZE_INO
, &inode
,
499 ctx
->flags
|= E2F_FLAG_RESIZE_INODE
;
501 if (!(ctx
->options
& E2F_OPT_READONLY
)) {
502 fs
->super
->s_state
&= ~EXT2_VALID_FS
;
503 ext2fs_mark_super_dirty(fs
);
507 dind_buf
= (__u32
*) e2fsck_allocate_memory(ctx
, fs
->blocksize
* 2,
508 "resize dind buffer");
509 ind_buf
= (__u32
*) ((char *) dind_buf
+ fs
->blocksize
);
511 retval
= ext2fs_read_ind_block(fs
, blk
, dind_buf
);
513 goto resize_inode_invalid
;
515 gdt_off
= fs
->desc_blocks
;
516 pblk
= fs
->super
->s_first_data_block
+ 1 + fs
->desc_blocks
;
517 if (fs
->blocksize
== 1024 && fs
->super
->s_first_data_block
== 0)
518 pblk
++; /* Deal with 1024 blocksize bigalloc fs */
519 for (i
= 0; i
< fs
->super
->s_reserved_gdt_blocks
/ 4;
520 i
++, gdt_off
++, pblk
++) {
521 gdt_off
%= fs
->blocksize
/4;
522 if (dind_buf
[gdt_off
] != pblk
)
523 goto resize_inode_invalid
;
524 retval
= ext2fs_read_ind_block(fs
, pblk
, ind_buf
);
526 goto resize_inode_invalid
;
528 for (j
= 1; j
< fs
->group_desc_count
; j
++) {
529 if (!ext2fs_bg_has_super(fs
, j
))
531 expect
= pblk
+ EXT2_GROUPS_TO_BLOCKS(fs
->super
, j
);
532 if (ind_buf
[ind_off
] != expect
)
533 goto resize_inode_invalid
;
540 ext2fs_free_mem(&dind_buf
);
545 * This function checks the dirhash signed/unsigned hint if necessary.
547 static void e2fsck_fix_dirhash_hint(e2fsck_t ctx
)
549 struct ext2_super_block
*sb
= ctx
->fs
->super
;
550 struct problem_context pctx
;
553 if ((ctx
->options
& E2F_OPT_READONLY
) ||
554 !ext2fs_has_feature_dir_index(sb
) ||
555 (sb
->s_flags
& (EXT2_FLAGS_SIGNED_HASH
|EXT2_FLAGS_UNSIGNED_HASH
)))
560 clear_problem_context(&pctx
);
561 if (fix_problem(ctx
, PR_0_DIRHASH_HINT
, &pctx
)) {
562 if (((int) c
) == -1) {
563 sb
->s_flags
|= EXT2_FLAGS_SIGNED_HASH
;
565 sb
->s_flags
|= EXT2_FLAGS_UNSIGNED_HASH
;
567 ext2fs_mark_super_dirty(ctx
->fs
);
572 void check_super_block(e2fsck_t ctx
)
574 ext2_filsys fs
= ctx
->fs
;
575 blk64_t first_block
, last_block
;
576 struct ext2_super_block
*sb
= fs
->super
;
577 unsigned int ipg_max
;
579 blk64_t blocks_per_group
= fs
->super
->s_blocks_per_group
;
580 __u32 bpg_max
, cpg_max
;
582 int inodes_per_block
;
584 int accept_time_fudge
;
585 int broken_system_clock
;
588 struct problem_context pctx
;
589 blk64_t free_blocks
= 0;
590 ino_t free_inodes
= 0;
591 int csum_flag
, clear_test_fs_flag
;
593 inodes_per_block
= EXT2_INODES_PER_BLOCK(fs
->super
);
594 ipg_max
= inodes_per_block
* (blocks_per_group
- 4);
595 if (ipg_max
> EXT2_MAX_INODES_PER_GROUP(sb
))
596 ipg_max
= EXT2_MAX_INODES_PER_GROUP(sb
);
597 cpg_max
= 8 * EXT2_BLOCK_SIZE(sb
);
598 if (cpg_max
> EXT2_MAX_CLUSTERS_PER_GROUP(sb
))
599 cpg_max
= EXT2_MAX_CLUSTERS_PER_GROUP(sb
);
600 bpg_max
= 8 * EXT2_BLOCK_SIZE(sb
) * EXT2FS_CLUSTER_RATIO(fs
);
601 if (bpg_max
> EXT2_MAX_BLOCKS_PER_GROUP(sb
))
602 bpg_max
= EXT2_MAX_BLOCKS_PER_GROUP(sb
);
604 ctx
->invalid_inode_bitmap_flag
= (int *) e2fsck_allocate_memory(ctx
,
605 sizeof(int) * fs
->group_desc_count
, "invalid_inode_bitmap");
606 ctx
->invalid_block_bitmap_flag
= (int *) e2fsck_allocate_memory(ctx
,
607 sizeof(int) * fs
->group_desc_count
, "invalid_block_bitmap");
608 ctx
->invalid_inode_table_flag
= (int *) e2fsck_allocate_memory(ctx
,
609 sizeof(int) * fs
->group_desc_count
, "invalid_inode_table");
611 blks_max
= (1ULL << 32) * EXT2_MAX_BLOCKS_PER_GROUP(fs
->super
);
612 if (ext2fs_has_feature_64bit(fs
->super
)) {
613 if (blks_max
> ((1ULL << 48) - 1))
614 blks_max
= (1ULL << 48) - 1;
616 if (blks_max
> ((1ULL << 32) - 1))
617 blks_max
= (1ULL << 32) - 1;
620 clear_problem_context(&pctx
);
623 * Verify the super block constants...
625 if (!check_super_value(ctx
, "inodes_count", sb
->s_inodes_count
,
628 if (!check_super_value64(ctx
, "blocks_count", ext2fs_blocks_count(sb
),
629 MIN_CHECK
| MAX_CHECK
, 1, blks_max
))
631 if (!check_super_value(ctx
, "first_data_block", sb
->s_first_data_block
,
632 MAX_CHECK
, 0, ext2fs_blocks_count(sb
)))
634 if (!check_super_value(ctx
, "log_block_size", sb
->s_log_block_size
,
635 MIN_CHECK
| MAX_CHECK
, 0,
636 EXT2_MAX_BLOCK_LOG_SIZE
- EXT2_MIN_BLOCK_LOG_SIZE
))
638 if (!check_super_value(ctx
, "log_cluster_size",
639 sb
->s_log_cluster_size
,
640 MIN_CHECK
| MAX_CHECK
, sb
->s_log_block_size
,
641 (EXT2_MAX_CLUSTER_LOG_SIZE
-
642 EXT2_MIN_CLUSTER_LOG_SIZE
)))
644 if (!check_super_value(ctx
, "clusters_per_group",
645 sb
->s_clusters_per_group
,
646 MIN_CHECK
| MAX_CHECK
, 8, cpg_max
))
648 if (!check_super_value(ctx
, "blocks_per_group", sb
->s_blocks_per_group
,
649 MIN_CHECK
| MAX_CHECK
, 8, bpg_max
))
651 if (!check_super_value(ctx
, "inodes_per_group", sb
->s_inodes_per_group
,
652 MIN_CHECK
| MAX_CHECK
, inodes_per_block
, ipg_max
))
654 if (!check_super_value(ctx
, "r_blocks_count", ext2fs_r_blocks_count(sb
),
655 MAX_CHECK
, 0, ext2fs_blocks_count(sb
) / 2))
657 if (!check_super_value(ctx
, "reserved_gdt_blocks",
658 sb
->s_reserved_gdt_blocks
, MAX_CHECK
, 0,
659 fs
->blocksize
/ sizeof(__u32
)))
661 if (!check_super_value(ctx
, "desc_size",
662 sb
->s_desc_size
, MAX_CHECK
| LOG2_CHECK
, 0,
666 should_be
= (__u64
)sb
->s_inodes_per_group
* fs
->group_desc_count
;
667 if (should_be
> ~0U) {
668 pctx
.num
= should_be
;
669 fix_problem(ctx
, PR_0_INODE_COUNT_BIG
, &pctx
);
670 ctx
->flags
|= E2F_FLAG_ABORT
;
673 if (sb
->s_inodes_count
!= should_be
) {
674 pctx
.ino
= sb
->s_inodes_count
;
675 pctx
.ino2
= should_be
;
676 if (fix_problem(ctx
, PR_0_INODE_COUNT_WRONG
, &pctx
)) {
677 sb
->s_inodes_count
= should_be
;
678 ext2fs_mark_super_dirty(fs
);
681 if (sb
->s_rev_level
> EXT2_GOOD_OLD_REV
&&
682 !check_super_value(ctx
, "first_ino", sb
->s_first_ino
,
683 MIN_CHECK
| MAX_CHECK
,
684 EXT2_GOOD_OLD_FIRST_INO
, sb
->s_inodes_count
))
686 inode_size
= EXT2_INODE_SIZE(sb
);
687 if (!check_super_value(ctx
, "inode_size",
688 inode_size
, MIN_CHECK
| MAX_CHECK
| LOG2_CHECK
,
689 EXT2_GOOD_OLD_INODE_SIZE
, fs
->blocksize
))
691 if (sb
->s_blocks_per_group
!= (sb
->s_clusters_per_group
*
692 EXT2FS_CLUSTER_RATIO(fs
))) {
693 pctx
.num
= sb
->s_clusters_per_group
* EXT2FS_CLUSTER_RATIO(fs
);
694 pctx
.str
= "block_size";
695 fix_problem(ctx
, PR_0_MISC_CORRUPT_SUPER
, &pctx
);
696 ctx
->flags
|= E2F_FLAG_ABORT
;
700 if ((ctx
->flags
& E2F_FLAG_GOT_DEVSIZE
) &&
701 (ctx
->num_blocks
< ext2fs_blocks_count(sb
))) {
702 pctx
.blk
= ext2fs_blocks_count(sb
);
703 pctx
.blk2
= ctx
->num_blocks
;
704 if (fix_problem(ctx
, PR_0_FS_SIZE_WRONG
, &pctx
)) {
705 ctx
->flags
|= E2F_FLAG_ABORT
;
710 should_be
= (sb
->s_log_block_size
== 0 &&
711 EXT2FS_CLUSTER_RATIO(fs
) == 1) ? 1 : 0;
712 if (sb
->s_first_data_block
!= should_be
) {
713 pctx
.blk
= sb
->s_first_data_block
;
714 pctx
.blk2
= should_be
;
715 fix_problem(ctx
, PR_0_FIRST_DATA_BLOCK
, &pctx
);
716 ctx
->flags
|= E2F_FLAG_ABORT
;
720 if (EXT2_INODE_SIZE(sb
) > EXT2_GOOD_OLD_INODE_SIZE
) {
722 sizeof(((struct ext2_inode_large
*) 0)->i_extra_isize
) +
723 sizeof(((struct ext2_inode_large
*) 0)->i_checksum_hi
);
724 unsigned max
= EXT2_INODE_SIZE(sb
) - EXT2_GOOD_OLD_INODE_SIZE
;
725 pctx
.num
= sb
->s_min_extra_isize
;
726 if (sb
->s_min_extra_isize
&&
727 (sb
->s_min_extra_isize
< min
||
728 sb
->s_min_extra_isize
> max
||
729 sb
->s_min_extra_isize
& 3) &&
730 fix_problem(ctx
, PR_0_BAD_MIN_EXTRA_ISIZE
, &pctx
)) {
731 sb
->s_min_extra_isize
=
732 (sizeof(struct ext2_inode_large
) -
733 EXT2_GOOD_OLD_INODE_SIZE
);
734 ext2fs_mark_super_dirty(fs
);
736 pctx
.num
= sb
->s_want_extra_isize
;
737 if (sb
->s_want_extra_isize
&&
738 (sb
->s_want_extra_isize
< min
||
739 sb
->s_want_extra_isize
> max
||
740 sb
->s_want_extra_isize
& 3) &&
741 fix_problem(ctx
, PR_0_BAD_WANT_EXTRA_ISIZE
, &pctx
)) {
742 sb
->s_want_extra_isize
=
743 (sizeof(struct ext2_inode_large
) -
744 EXT2_GOOD_OLD_INODE_SIZE
);
745 ext2fs_mark_super_dirty(fs
);
749 /* Are metadata_csum and uninit_bg both set? */
750 if (ext2fs_has_feature_metadata_csum(fs
->super
) &&
751 ext2fs_has_feature_gdt_csum(fs
->super
) &&
752 fix_problem(ctx
, PR_0_META_AND_GDT_CSUM_SET
, &pctx
)) {
753 ext2fs_clear_feature_gdt_csum(fs
->super
);
754 ext2fs_mark_super_dirty(fs
);
755 for (i
= 0; i
< fs
->group_desc_count
; i
++)
756 ext2fs_group_desc_csum_set(fs
, i
);
759 /* We can't have ^metadata_csum,metadata_csum_seed */
760 if (!ext2fs_has_feature_metadata_csum(fs
->super
) &&
761 ext2fs_has_feature_csum_seed(fs
->super
) &&
762 fix_problem(ctx
, PR_0_CSUM_SEED_WITHOUT_META_CSUM
, &pctx
)) {
763 ext2fs_clear_feature_csum_seed(fs
->super
);
764 fs
->super
->s_checksum_seed
= 0;
765 ext2fs_mark_super_dirty(fs
);
768 /* Is 64bit set and extents unset? */
769 if (ext2fs_has_feature_64bit(fs
->super
) &&
770 !ext2fs_has_feature_extents(fs
->super
) &&
771 fix_problem(ctx
, PR_0_64BIT_WITHOUT_EXTENTS
, &pctx
)) {
772 ext2fs_set_feature_extents(fs
->super
);
773 ext2fs_mark_super_dirty(fs
);
776 /* Did user ask us to convert files to extents? */
777 if (ctx
->options
& E2F_OPT_CONVERT_BMAP
) {
778 ext2fs_set_feature_extents(fs
->super
);
779 ext2fs_mark_super_dirty(fs
);
782 if (ext2fs_has_feature_meta_bg(fs
->super
) &&
783 (fs
->super
->s_first_meta_bg
> fs
->desc_blocks
)) {
784 pctx
.group
= fs
->desc_blocks
;
785 pctx
.num
= fs
->super
->s_first_meta_bg
;
786 if (fix_problem(ctx
, PR_0_FIRST_META_BG_TOO_BIG
, &pctx
)) {
787 ext2fs_clear_feature_meta_bg(fs
->super
);
788 fs
->super
->s_first_meta_bg
= 0;
789 ext2fs_mark_super_dirty(fs
);
794 * Verify the group descriptors....
796 first_block
= sb
->s_first_data_block
;
797 last_block
= ext2fs_blocks_count(sb
)-1;
799 csum_flag
= ext2fs_has_group_desc_csum(fs
);
800 for (i
= 0; i
< fs
->group_desc_count
; i
++) {
803 if (!ext2fs_has_feature_flex_bg(fs
->super
)) {
804 first_block
= ext2fs_group_first_block2(fs
, i
);
805 last_block
= ext2fs_group_last_block2(fs
, i
);
808 if ((ext2fs_block_bitmap_loc(fs
, i
) < first_block
) ||
809 (ext2fs_block_bitmap_loc(fs
, i
) > last_block
)) {
810 pctx
.blk
= ext2fs_block_bitmap_loc(fs
, i
);
811 if (fix_problem(ctx
, PR_0_BB_NOT_GROUP
, &pctx
))
812 ext2fs_block_bitmap_loc_set(fs
, i
, 0);
814 if (ext2fs_block_bitmap_loc(fs
, i
) == 0) {
815 ctx
->invalid_block_bitmap_flag
[i
]++;
816 ctx
->invalid_bitmaps
++;
818 if ((ext2fs_inode_bitmap_loc(fs
, i
) < first_block
) ||
819 (ext2fs_inode_bitmap_loc(fs
, i
) > last_block
)) {
820 pctx
.blk
= ext2fs_inode_bitmap_loc(fs
, i
);
821 if (fix_problem(ctx
, PR_0_IB_NOT_GROUP
, &pctx
))
822 ext2fs_inode_bitmap_loc_set(fs
, i
, 0);
824 if (ext2fs_inode_bitmap_loc(fs
, i
) == 0) {
825 ctx
->invalid_inode_bitmap_flag
[i
]++;
826 ctx
->invalid_bitmaps
++;
828 if ((ext2fs_inode_table_loc(fs
, i
) < first_block
) ||
829 ((ext2fs_inode_table_loc(fs
, i
) +
830 fs
->inode_blocks_per_group
- 1) > last_block
)) {
831 pctx
.blk
= ext2fs_inode_table_loc(fs
, i
);
832 if (fix_problem(ctx
, PR_0_ITABLE_NOT_GROUP
, &pctx
))
833 ext2fs_inode_table_loc_set(fs
, i
, 0);
835 if (ext2fs_inode_table_loc(fs
, i
) == 0) {
836 ctx
->invalid_inode_table_flag
[i
]++;
837 ctx
->invalid_bitmaps
++;
839 free_blocks
+= ext2fs_bg_free_blocks_count(fs
, i
);
840 free_inodes
+= ext2fs_bg_free_inodes_count(fs
, i
);
842 if ((ext2fs_bg_free_blocks_count(fs
, i
) > sb
->s_blocks_per_group
) ||
843 (ext2fs_bg_free_inodes_count(fs
, i
) > sb
->s_inodes_per_group
) ||
844 (ext2fs_bg_used_dirs_count(fs
, i
) > sb
->s_inodes_per_group
))
845 ext2fs_unmark_valid(fs
);
848 if (!ext2fs_group_desc_csum_verify(fs
, i
)) {
849 pctx
.csum1
= ext2fs_bg_checksum(fs
, i
);
850 pctx
.csum2
= ext2fs_group_desc_csum(fs
, i
);
851 if (fix_problem(ctx
, PR_0_GDT_CSUM
, &pctx
)) {
852 ext2fs_bg_flags_clear(fs
, i
, EXT2_BG_BLOCK_UNINIT
);
853 ext2fs_bg_flags_clear(fs
, i
, EXT2_BG_INODE_UNINIT
);
854 ext2fs_bg_itable_unused_set(fs
, i
, 0);
857 ext2fs_unmark_valid(fs
);
861 (ext2fs_bg_flags_test(fs
, i
, EXT2_BG_BLOCK_UNINIT
) ||
862 ext2fs_bg_flags_test(fs
, i
, EXT2_BG_INODE_UNINIT
) ||
863 ext2fs_bg_itable_unused(fs
, i
) != 0)) {
864 if (fix_problem(ctx
, PR_0_GDT_UNINIT
, &pctx
)) {
865 ext2fs_bg_flags_clear(fs
, i
, EXT2_BG_BLOCK_UNINIT
);
866 ext2fs_bg_flags_clear(fs
, i
, EXT2_BG_INODE_UNINIT
);
867 ext2fs_bg_itable_unused_set(fs
, i
, 0);
870 ext2fs_unmark_valid(fs
);
873 if (i
== fs
->group_desc_count
- 1 &&
874 ext2fs_bg_flags_test(fs
, i
, EXT2_BG_BLOCK_UNINIT
)) {
875 if (fix_problem(ctx
, PR_0_BB_UNINIT_LAST
, &pctx
)) {
876 ext2fs_bg_flags_clear(fs
, i
, EXT2_BG_BLOCK_UNINIT
);
879 ext2fs_unmark_valid(fs
);
883 (ext2fs_bg_itable_unused(fs
, i
) > ext2fs_bg_free_inodes_count(fs
, i
) ||
884 ext2fs_bg_itable_unused(fs
, i
) > sb
->s_inodes_per_group
)) {
885 pctx
.blk
= ext2fs_bg_itable_unused(fs
, i
);
886 if (fix_problem(ctx
, PR_0_GDT_ITABLE_UNUSED
, &pctx
)) {
887 ext2fs_bg_itable_unused_set(fs
, i
, 0);
890 ext2fs_unmark_valid(fs
);
894 ext2fs_group_desc_csum_set(fs
, i
);
895 /* If the user aborts e2fsck by typing ^C, stop right away */
896 if (ctx
->flags
& E2F_FLAG_SIGNAL_MASK
)
900 ctx
->free_blocks
= EXT2FS_C2B(fs
, free_blocks
);
901 ctx
->free_inodes
= free_inodes
;
903 if ((ext2fs_free_blocks_count(sb
) > ext2fs_blocks_count(sb
)) ||
904 (sb
->s_free_inodes_count
> sb
->s_inodes_count
))
905 ext2fs_unmark_valid(fs
);
909 * If we have invalid bitmaps, set the error state of the
912 if (ctx
->invalid_bitmaps
&& !(ctx
->options
& E2F_OPT_READONLY
)) {
913 sb
->s_state
&= ~EXT2_VALID_FS
;
914 ext2fs_mark_super_dirty(fs
);
917 clear_problem_context(&pctx
);
919 #ifndef EXT2_SKIP_UUID
921 * If the UUID field isn't assigned, assign it.
922 * Skip if checksums are enabled and the filesystem is mounted,
923 * if the id changes under the kernel remounting rw may fail.
925 if (!(ctx
->options
& E2F_OPT_READONLY
) && uuid_is_null(sb
->s_uuid
) &&
926 !ext2fs_has_feature_metadata_csum(ctx
->fs
->super
) &&
927 (!csum_flag
|| !(ctx
->mount_flags
& EXT2_MF_MOUNTED
))) {
928 if (fix_problem(ctx
, PR_0_ADD_UUID
, &pctx
)) {
929 uuid_generate(sb
->s_uuid
);
930 ext2fs_init_csum_seed(fs
);
931 fs
->flags
|= EXT2_FLAG_DIRTY
;
932 fs
->flags
&= ~EXT2_FLAG_MASTER_SB_ONLY
;
938 * Check to see if we should disable the test_fs flag
940 profile_get_boolean(ctx
->profile
, "options",
941 "clear_test_fs_flag", 0, 1,
942 &clear_test_fs_flag
);
943 if (!(ctx
->options
& E2F_OPT_READONLY
) &&
944 clear_test_fs_flag
&&
945 (fs
->super
->s_flags
& EXT2_FLAGS_TEST_FILESYS
) &&
946 (fs_proc_check("ext4") || check_for_modules("ext4"))) {
947 if (fix_problem(ctx
, PR_0_CLEAR_TESTFS_FLAG
, &pctx
)) {
948 fs
->super
->s_flags
&= ~EXT2_FLAGS_TEST_FILESYS
;
949 fs
->flags
|= EXT2_FLAG_DIRTY
;
950 fs
->flags
&= ~EXT2_FLAG_MASTER_SB_ONLY
;
955 * For the Hurd, check to see if the filetype option is set,
956 * since it doesn't support it.
958 if (!(ctx
->options
& E2F_OPT_READONLY
) &&
959 fs
->super
->s_creator_os
== EXT2_OS_HURD
&&
960 ext2fs_has_feature_filetype(fs
->super
)) {
961 if (fix_problem(ctx
, PR_0_HURD_CLEAR_FILETYPE
, &pctx
)) {
962 ext2fs_clear_feature_filetype(fs
->super
);
963 ext2fs_mark_super_dirty(fs
);
964 fs
->flags
&= ~EXT2_FLAG_MASTER_SB_ONLY
;
969 * If we have any of the compatibility flags set, we need to have a
970 * revision 1 filesystem. Most kernels will not check the flags on
971 * a rev 0 filesystem and we may have corruption issues because of
972 * the incompatible changes to the filesystem.
974 if (!(ctx
->options
& E2F_OPT_READONLY
) &&
975 fs
->super
->s_rev_level
== EXT2_GOOD_OLD_REV
&&
976 (fs
->super
->s_feature_compat
||
977 fs
->super
->s_feature_ro_compat
||
978 fs
->super
->s_feature_incompat
) &&
979 fix_problem(ctx
, PR_0_FS_REV_LEVEL
, &pctx
)) {
980 ext2fs_update_dynamic_rev(fs
);
981 ext2fs_mark_super_dirty(fs
);
982 fs
->flags
&= ~EXT2_FLAG_MASTER_SB_ONLY
;
986 * Clean up any orphan inodes, if present.
988 if (!(ctx
->options
& E2F_OPT_READONLY
) && release_orphan_inodes(ctx
)) {
989 fs
->super
->s_state
&= ~EXT2_VALID_FS
;
990 ext2fs_mark_super_dirty(fs
);
994 * Unfortunately, due to Windows' unfortunate design decision
995 * to configure the hardware clock to tick localtime, instead
996 * of the more proper and less error-prone UTC time, many
997 * users end up in the situation where the system clock is
998 * incorrectly set at the time when e2fsck is run.
1000 * Historically this was usually due to some distributions
1001 * having buggy init scripts and/or installers that didn't
1002 * correctly detect this case and take appropriate
1003 * countermeasures. However, it's still possible, despite the
1004 * best efforts of init script and installer authors to not be
1005 * able to detect this misconfiguration, usually due to a
1006 * buggy or misconfigured virtualization manager or the
1007 * installer not having access to a network time server during
1008 * the installation process. So by default, we allow the
1009 * superblock times to be fudged by up to 24 hours. This can
1010 * be disabled by setting options.accept_time_fudge to the
1011 * boolean value of false in e2fsck.conf. We also support
1012 * options.buggy_init_scripts for backwards compatibility.
1014 profile_get_boolean(ctx
->profile
, "options", "accept_time_fudge",
1015 0, 1, &accept_time_fudge
);
1016 profile_get_boolean(ctx
->profile
, "options", "buggy_init_scripts",
1017 0, accept_time_fudge
, &accept_time_fudge
);
1018 ctx
->time_fudge
= accept_time_fudge
? 86400 : 0;
1020 profile_get_boolean(ctx
->profile
, "options", "broken_system_clock",
1021 0, 0, &broken_system_clock
);
1024 * Check to see if the superblock last mount time or last
1025 * write time is in the future.
1027 if (!broken_system_clock
&&
1028 !(ctx
->flags
& E2F_FLAG_TIME_INSANE
) &&
1029 fs
->super
->s_mtime
> (__u32
) ctx
->now
) {
1030 pctx
.num
= fs
->super
->s_mtime
;
1031 problem
= PR_0_FUTURE_SB_LAST_MOUNT
;
1032 if (fs
->super
->s_mtime
<= (__u32
) ctx
->now
+ ctx
->time_fudge
)
1033 problem
= PR_0_FUTURE_SB_LAST_MOUNT_FUDGED
;
1034 if (fix_problem(ctx
, problem
, &pctx
)) {
1035 fs
->super
->s_mtime
= ctx
->now
;
1036 fs
->flags
|= EXT2_FLAG_DIRTY
;
1039 if (!broken_system_clock
&&
1040 !(ctx
->flags
& E2F_FLAG_TIME_INSANE
) &&
1041 fs
->super
->s_wtime
> (__u32
) ctx
->now
) {
1042 pctx
.num
= fs
->super
->s_wtime
;
1043 problem
= PR_0_FUTURE_SB_LAST_WRITE
;
1044 if (fs
->super
->s_wtime
<= (__u32
) ctx
->now
+ ctx
->time_fudge
)
1045 problem
= PR_0_FUTURE_SB_LAST_WRITE_FUDGED
;
1046 if (fix_problem(ctx
, problem
, &pctx
)) {
1047 fs
->super
->s_wtime
= ctx
->now
;
1048 fs
->flags
|= EXT2_FLAG_DIRTY
;
1052 e2fsck_validate_quota_inodes(ctx
);
1055 * Move the ext3 journal file, if necessary.
1057 e2fsck_move_ext3_journal(ctx
);
1060 * Fix journal hint, if necessary
1062 e2fsck_fix_ext3_journal_hint(ctx
);
1065 * Add dirhash hint if necessary
1067 e2fsck_fix_dirhash_hint(ctx
);
1070 * Hide quota inodes if necessary.
1072 e2fsck_hide_quota(ctx
);
1078 * Check to see if we should backup the master sb to the backup super
1079 * blocks. Returns non-zero if the sb should be backed up.
1083 * A few flags are set on the fly by the kernel, but only in the
1084 * primary superblock. This is actually a bad thing, and we should
1085 * try to discourage it in the future. In particular, for the newer
1086 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
1087 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
1088 * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
1089 * copying the primary superblock during online resize.
1091 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
1092 * unfortunately, we shouldn't ignore it since if it's not set in the
1093 * backup, the extended attributes in the filesystem will be stripped
1096 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
1097 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
1098 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
1099 EXT3_FEATURE_INCOMPAT_RECOVER)
1101 int check_backup_super_block(e2fsck_t ctx
)
1103 ext2_filsys fs
= ctx
->fs
;
1108 char buf
[SUPERBLOCK_SIZE
];
1109 struct ext2_super_block
*backup_sb
;
1112 * If we are already writing out the backup blocks, then we
1113 * don't need to test. Also, if the filesystem is invalid, or
1114 * the check was aborted or cancelled, we also don't want to
1115 * do the backup. If the filesystem was opened read-only then
1116 * we can't do the backup.
1118 if (((fs
->flags
& EXT2_FLAG_MASTER_SB_ONLY
) == 0) ||
1119 !ext2fs_test_valid(fs
) ||
1120 (fs
->super
->s_state
& EXT2_ERROR_FS
) ||
1121 (ctx
->flags
& (E2F_FLAG_ABORT
| E2F_FLAG_CANCEL
)) ||
1122 (ctx
->options
& E2F_OPT_READONLY
))
1125 for (g
= 1; g
< fs
->group_desc_count
; g
++) {
1126 if (!ext2fs_bg_has_super(fs
, g
))
1129 sb
= ext2fs_group_first_block2(fs
, g
);
1131 retval
= io_channel_read_blk(fs
->io
, sb
, -SUPERBLOCK_SIZE
,
1135 backup_sb
= (struct ext2_super_block
*) buf
;
1136 #ifdef WORDS_BIGENDIAN
1137 ext2fs_swap_super(backup_sb
);
1139 if ((backup_sb
->s_magic
!= EXT2_SUPER_MAGIC
) ||
1140 (backup_sb
->s_rev_level
> EXT2_LIB_CURRENT_REV
) ||
1141 ((backup_sb
->s_log_block_size
+ EXT2_MIN_BLOCK_LOG_SIZE
) >
1142 EXT2_MAX_BLOCK_LOG_SIZE
) ||
1143 (EXT2_INODE_SIZE(backup_sb
) < EXT2_GOOD_OLD_INODE_SIZE
))
1146 #define SUPER_INCOMPAT_DIFFERENT(x) \
1147 ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
1148 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
1149 #define SUPER_RO_COMPAT_DIFFERENT(x) \
1150 ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
1151 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
1152 #define SUPER_DIFFERENT(x) \
1153 (fs->super->x != backup_sb->x)
1155 if (SUPER_DIFFERENT(s_feature_compat
) ||
1156 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat
) ||
1157 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat
) ||
1158 SUPER_DIFFERENT(s_blocks_count
) ||
1159 SUPER_DIFFERENT(s_blocks_count_hi
) ||
1160 SUPER_DIFFERENT(s_inodes_count
) ||
1161 memcmp(fs
->super
->s_uuid
, backup_sb
->s_uuid
,
1162 sizeof(fs
->super
->s_uuid
)))