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"
26 static void check_super_value(e2fsck_t ctx, const char *descr,
27 unsigned long value, int flags,
28 unsigned long min_val, unsigned long max_val)
30 struct problem_context pctx;
32 if (((flags & MIN_CHECK) && (value < min_val)) ||
33 ((flags & MAX_CHECK) && (value > max_val))) {
34 clear_problem_context(&pctx);
37 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
38 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
43 * helper function to release an inode
45 struct process_block_struct {
48 struct problem_context *pctx;
51 e2_blkcnt_t truncate_block;
57 static int release_inode_block(ext2_filsys fs,
60 blk64_t ref_blk EXT2FS_ATTR((unused)),
61 int ref_offset EXT2FS_ATTR((unused)),
64 struct process_block_struct *pb;
66 struct problem_context *pctx;
67 blk64_t blk = *block_nr;
70 pb = (struct process_block_struct *) priv_data;
75 pctx->blkcount = blockcnt;
77 if (HOLE_BLKADDR(blk))
80 if ((blk < fs->super->s_first_data_block) ||
81 (blk >= ext2fs_blocks_count(fs->super))) {
82 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
88 if (!ext2fs_test_block_bitmap2(fs->block_map, blk)) {
89 fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
94 * If we are deleting an orphan, then we leave the fields alone.
95 * If we are truncating an orphan, then update the inode fields
96 * and clean up any partial block data.
100 * We only remove indirect blocks if they are
107 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
112 limit = fs->blocksize >> 2;
113 for (i = 0, bp = (blk_t *) pb->buf;
114 i < limit; i++, bp++)
119 * We don't remove direct blocks until we've reached
120 * the truncation block.
122 if (blockcnt >= 0 && blockcnt < pb->truncate_block)
125 * If part of the last block needs truncating, we do
128 if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
129 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
133 memset(pb->buf + pb->truncate_offset, 0,
134 fs->blocksize - pb->truncate_offset);
135 pb->errcode = io_channel_write_blk64(fs->io, blk, 1,
140 pb->truncated_blocks++;
142 retval |= BLOCK_CHANGED;
145 ext2fs_block_alloc_stats2(fs, blk, -1);
151 * This function releases an inode. Returns 1 if an inconsistency was
152 * found. If the inode has a link count, then it is being truncated and
155 static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
156 struct ext2_inode *inode, char *block_buf,
157 struct problem_context *pctx)
159 struct process_block_struct pb;
160 ext2_filsys fs = ctx->fs;
164 if (!ext2fs_inode_has_valid_blocks2(fs, inode))
167 pb.buf = block_buf + 3 * ctx->fs->blocksize;
172 if (inode->i_links_count) {
174 pb.truncate_block = (e2_blkcnt_t)
175 ((EXT2_I_SIZE(inode) + fs->blocksize - 1) /
177 pb.truncate_offset = inode->i_size % fs->blocksize;
180 pb.truncate_block = 0;
181 pb.truncate_offset = 0;
183 pb.truncated_blocks = 0;
184 retval = ext2fs_block_iterate3(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
185 block_buf, release_inode_block, &pb);
187 com_err("release_inode_blocks", retval,
188 _("while calling ext2fs_block_iterate for inode %d"),
195 /* Refresh the inode since ext2fs_block_iterate may have changed it */
196 e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks");
198 if (pb.truncated_blocks)
199 ext2fs_iblk_sub_blocks(fs, inode, pb.truncated_blocks);
201 if (ext2fs_file_acl_block(fs, inode)) {
202 retval = ext2fs_adjust_ea_refcount3(fs,
203 ext2fs_file_acl_block(fs, inode),
204 block_buf, -1, &count, ino);
205 if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
210 com_err("release_inode_blocks", retval,
211 _("while calling ext2fs_adjust_ea_refcount2 for inode %d"),
216 ext2fs_block_alloc_stats2(fs,
217 ext2fs_file_acl_block(fs, inode), -1);
220 ext2fs_file_acl_block_set(fs, inode, 0);
226 * This function releases all of the orphan inodes. It returns 1 if
227 * it hit some error, and 0 on success.
229 static int release_orphan_inodes(e2fsck_t ctx)
231 ext2_filsys fs = ctx->fs;
232 ext2_ino_t ino, next_ino;
233 struct ext2_inode inode;
234 struct problem_context pctx;
237 if ((ino = fs->super->s_last_orphan) == 0)
241 * Win or lose, we won't be using the head of the orphan inode
244 fs->super->s_last_orphan = 0;
245 ext2fs_mark_super_dirty(fs);
248 * If the filesystem contains errors, don't run the orphan
249 * list, since the orphan list can't be trusted; and we're
250 * going to be running a full e2fsck run anyway...
252 if (fs->super->s_state & EXT2_ERROR_FS)
255 if ((ino < EXT2_FIRST_INODE(fs->super)) ||
256 (ino > fs->super->s_inodes_count)) {
257 clear_problem_context(&pctx);
259 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
263 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
264 "block iterate buffer");
265 e2fsck_read_bitmaps(ctx);
268 e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
269 clear_problem_context(&pctx);
272 pctx.str = inode.i_links_count ? _("Truncating") :
275 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
277 next_ino = inode.i_dtime;
279 ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
280 (next_ino > fs->super->s_inodes_count))) {
282 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
286 if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
289 if (!inode.i_links_count) {
290 ext2fs_inode_alloc_stats2(fs, ino, -1,
291 LINUX_S_ISDIR(inode.i_mode));
293 inode.i_dtime = ctx->now;
297 e2fsck_write_inode(ctx, ino, &inode, "delete_file");
300 ext2fs_free_mem(&block_buf);
303 ext2fs_free_mem(&block_buf);
308 * Check the resize inode to make sure it is sane. We check both for
309 * the case where on-line resizing is not enabled (in which case the
310 * resize inode should be cleared) as well as the case where on-line
311 * resizing is enabled.
313 void check_resize_inode(e2fsck_t ctx)
315 ext2_filsys fs = ctx->fs;
316 struct ext2_inode inode;
317 struct problem_context pctx;
318 int i, gdt_off, ind_off;
321 blk_t expect; /* for resize inode, which is 32-bit only */
322 __u32 *dind_buf = 0, *ind_buf;
325 clear_problem_context(&pctx);
328 * If the resize inode feature isn't set, then
329 * s_reserved_gdt_blocks must be zero.
331 if (!(fs->super->s_feature_compat &
332 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
333 if (fs->super->s_reserved_gdt_blocks) {
334 pctx.num = fs->super->s_reserved_gdt_blocks;
335 if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
337 fs->super->s_reserved_gdt_blocks = 0;
338 ext2fs_mark_super_dirty(fs);
343 /* Read the resize inode */
344 pctx.ino = EXT2_RESIZE_INO;
345 retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
347 if (fs->super->s_feature_compat &
348 EXT2_FEATURE_COMPAT_RESIZE_INODE)
349 ctx->flags |= E2F_FLAG_RESIZE_INODE;
354 * If the resize inode feature isn't set, check to make sure
355 * the resize inode is cleared; then we're done.
357 if (!(fs->super->s_feature_compat &
358 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
359 for (i=0; i < EXT2_N_BLOCKS; i++) {
360 if (inode.i_block[i])
363 if ((i < EXT2_N_BLOCKS) &&
364 fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
365 memset(&inode, 0, sizeof(inode));
366 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
373 * The resize inode feature is enabled; check to make sure the
374 * only block in use is the double indirect block
376 blk = inode.i_block[EXT2_DIND_BLOCK];
377 for (i=0; i < EXT2_N_BLOCKS; i++) {
378 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
381 if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
382 !(inode.i_mode & LINUX_S_IFREG) ||
383 (blk < fs->super->s_first_data_block ||
384 blk >= ext2fs_blocks_count(fs->super))) {
385 resize_inode_invalid:
386 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
387 memset(&inode, 0, sizeof(inode));
388 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
390 ctx->flags |= E2F_FLAG_RESIZE_INODE;
392 if (!(ctx->options & E2F_OPT_READONLY)) {
393 fs->super->s_state &= ~EXT2_VALID_FS;
394 ext2fs_mark_super_dirty(fs);
398 dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
399 "resize dind buffer");
400 ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
402 retval = ext2fs_read_ind_block(fs, blk, dind_buf);
404 goto resize_inode_invalid;
406 gdt_off = fs->desc_blocks;
407 pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
408 if (fs->blocksize == 1024 && fs->super->s_first_data_block == 0)
409 pblk++; /* Deal with 1024 blocksize bigalloc fs */
410 for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
411 i++, gdt_off++, pblk++) {
412 gdt_off %= fs->blocksize/4;
413 if (dind_buf[gdt_off] != pblk)
414 goto resize_inode_invalid;
415 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
417 goto resize_inode_invalid;
419 for (j = 1; j < fs->group_desc_count; j++) {
420 if (!ext2fs_bg_has_super(fs, j))
422 expect = pblk + (j * fs->super->s_blocks_per_group);
423 if (ind_buf[ind_off] != expect)
424 goto resize_inode_invalid;
431 ext2fs_free_mem(&dind_buf);
436 * This function checks the dirhash signed/unsigned hint if necessary.
438 static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
440 struct ext2_super_block *sb = ctx->fs->super;
441 struct problem_context pctx;
444 if ((ctx->options & E2F_OPT_READONLY) ||
445 !(sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
446 (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
451 clear_problem_context(&pctx);
452 if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
453 if (((int) c) == -1) {
454 sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
456 sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
458 ext2fs_mark_super_dirty(ctx->fs);
463 void check_super_block(e2fsck_t ctx)
465 ext2_filsys fs = ctx->fs;
466 blk64_t first_block, last_block;
467 struct ext2_super_block *sb = fs->super;
468 unsigned int ipg_max;
470 blk64_t blocks_per_group = fs->super->s_blocks_per_group;
471 __u32 bpg_max, cpg_max;
472 int inodes_per_block;
474 int accept_time_fudge;
475 int broken_system_clock;
478 struct problem_context pctx;
479 blk64_t free_blocks = 0;
480 ino_t free_inodes = 0;
481 int csum_flag, clear_test_fs_flag;
483 inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
484 ipg_max = inodes_per_block * (blocks_per_group - 4);
485 if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
486 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
487 cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
488 if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
489 cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
490 bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
491 if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
492 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
494 ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
495 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
496 ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
497 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
498 ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
499 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
501 clear_problem_context(&pctx);
504 * Verify the super block constants...
506 check_super_value(ctx, "inodes_count", sb->s_inodes_count,
508 check_super_value(ctx, "blocks_count", ext2fs_blocks_count(sb),
510 check_super_value(ctx, "first_data_block", sb->s_first_data_block,
511 MAX_CHECK, 0, ext2fs_blocks_count(sb));
512 check_super_value(ctx, "log_block_size", sb->s_log_block_size,
513 MIN_CHECK | MAX_CHECK, 0,
514 EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
515 check_super_value(ctx, "log_cluster_size",
516 sb->s_log_cluster_size,
517 MIN_CHECK | MAX_CHECK, sb->s_log_block_size,
518 (EXT2_MAX_CLUSTER_LOG_SIZE -
519 EXT2_MIN_CLUSTER_LOG_SIZE));
520 check_super_value(ctx, "clusters_per_group", sb->s_clusters_per_group,
521 MIN_CHECK | MAX_CHECK, 8, cpg_max);
522 check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
523 MIN_CHECK | MAX_CHECK, 8, bpg_max);
524 check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
525 MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
526 check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
527 MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2);
528 check_super_value(ctx, "reserved_gdt_blocks",
529 sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
531 if (sb->s_rev_level > EXT2_GOOD_OLD_REV)
532 check_super_value(ctx, "first_ino", sb->s_first_ino,
533 MIN_CHECK | MAX_CHECK,
534 EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count);
535 inode_size = EXT2_INODE_SIZE(sb);
536 check_super_value(ctx, "inode_size",
537 inode_size, MIN_CHECK | MAX_CHECK,
538 EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize);
539 if (sb->s_blocks_per_group != (sb->s_clusters_per_group *
540 EXT2FS_CLUSTER_RATIO(fs))) {
541 pctx.num = sb->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs);
542 pctx.str = "block_size";
543 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
544 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
547 if (inode_size & (inode_size - 1)) {
548 pctx.num = inode_size;
549 pctx.str = "inode_size";
550 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
551 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
555 if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
556 (ctx->num_blocks < ext2fs_blocks_count(sb))) {
557 pctx.blk = ext2fs_blocks_count(sb);
558 pctx.blk2 = ctx->num_blocks;
559 if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
560 ctx->flags |= E2F_FLAG_ABORT;
565 should_be = (sb->s_log_block_size == 0 &&
566 EXT2FS_CLUSTER_RATIO(fs) == 1) ? 1 : 0;
567 if (sb->s_first_data_block != should_be) {
568 pctx.blk = sb->s_first_data_block;
569 pctx.blk2 = should_be;
570 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
571 ctx->flags |= E2F_FLAG_ABORT;
575 should_be = sb->s_inodes_per_group * fs->group_desc_count;
576 if (sb->s_inodes_count != should_be) {
577 pctx.ino = sb->s_inodes_count;
578 pctx.ino2 = should_be;
579 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
580 sb->s_inodes_count = should_be;
581 ext2fs_mark_super_dirty(fs);
585 /* Are metadata_csum and uninit_bg both set? */
586 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
587 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
588 EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
589 EXT4_FEATURE_RO_COMPAT_GDT_CSUM) &&
590 fix_problem(ctx, PR_0_META_AND_GDT_CSUM_SET, &pctx)) {
591 fs->super->s_feature_ro_compat &=
592 ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
593 ext2fs_mark_super_dirty(fs);
594 for (i = 0; i < fs->group_desc_count; i++)
595 ext2fs_group_desc_csum_set(fs, i);
598 /* Is 64bit set and extents unset? */
599 if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
600 EXT4_FEATURE_INCOMPAT_64BIT) &&
601 !EXT2_HAS_INCOMPAT_FEATURE(fs->super,
602 EXT3_FEATURE_INCOMPAT_EXTENTS) &&
603 fix_problem(ctx, PR_0_64BIT_WITHOUT_EXTENTS, &pctx)) {
604 fs->super->s_feature_incompat |=
605 EXT3_FEATURE_INCOMPAT_EXTENTS;
606 ext2fs_mark_super_dirty(fs);
610 * Verify the group descriptors....
612 first_block = sb->s_first_data_block;
613 last_block = ext2fs_blocks_count(sb)-1;
615 csum_flag = ext2fs_has_group_desc_csum(fs);
616 for (i = 0; i < fs->group_desc_count; i++) {
619 if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
620 EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
621 first_block = ext2fs_group_first_block2(fs, i);
622 last_block = ext2fs_group_last_block2(fs, i);
625 if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
626 (ext2fs_block_bitmap_loc(fs, i) > last_block)) {
627 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
628 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
629 ext2fs_block_bitmap_loc_set(fs, i, 0);
631 if (ext2fs_block_bitmap_loc(fs, i) == 0) {
632 ctx->invalid_block_bitmap_flag[i]++;
633 ctx->invalid_bitmaps++;
635 if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
636 (ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
637 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
638 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
639 ext2fs_inode_bitmap_loc_set(fs, i, 0);
641 if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
642 ctx->invalid_inode_bitmap_flag[i]++;
643 ctx->invalid_bitmaps++;
645 if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
646 ((ext2fs_inode_table_loc(fs, i) +
647 fs->inode_blocks_per_group - 1) > last_block)) {
648 pctx.blk = ext2fs_inode_table_loc(fs, i);
649 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
650 ext2fs_inode_table_loc_set(fs, i, 0);
652 if (ext2fs_inode_table_loc(fs, i) == 0) {
653 ctx->invalid_inode_table_flag[i]++;
654 ctx->invalid_bitmaps++;
656 free_blocks += ext2fs_bg_free_blocks_count(fs, i);
657 free_inodes += ext2fs_bg_free_inodes_count(fs, i);
659 if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
660 (ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
661 (ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
662 ext2fs_unmark_valid(fs);
665 if (!ext2fs_group_desc_csum_verify(fs, i)) {
666 pctx.csum1 = ext2fs_bg_checksum(fs, i);
667 pctx.csum2 = ext2fs_group_desc_csum(fs, i);
668 if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
669 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
670 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
671 ext2fs_bg_itable_unused_set(fs, i, 0);
674 ext2fs_unmark_valid(fs);
678 (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
679 ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
680 ext2fs_bg_itable_unused(fs, i) != 0)) {
681 if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
682 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
683 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
684 ext2fs_bg_itable_unused_set(fs, i, 0);
687 ext2fs_unmark_valid(fs);
690 if (i == fs->group_desc_count - 1 &&
691 ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
692 if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
693 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
696 ext2fs_unmark_valid(fs);
700 (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
701 ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
702 pctx.blk = ext2fs_bg_itable_unused(fs, i);
703 if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
704 ext2fs_bg_itable_unused_set(fs, i, 0);
707 ext2fs_unmark_valid(fs);
711 ext2fs_group_desc_csum_set(fs, i);
712 /* If the user aborts e2fsck by typing ^C, stop right away */
713 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
717 ctx->free_blocks = EXT2FS_C2B(fs, free_blocks);
718 ctx->free_inodes = free_inodes;
720 if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
721 (sb->s_free_inodes_count > sb->s_inodes_count))
722 ext2fs_unmark_valid(fs);
726 * If we have invalid bitmaps, set the error state of the
729 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
730 sb->s_state &= ~EXT2_VALID_FS;
731 ext2fs_mark_super_dirty(fs);
734 clear_problem_context(&pctx);
736 #ifndef EXT2_SKIP_UUID
738 * If the UUID field isn't assigned, assign it.
740 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
741 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
742 uuid_generate(sb->s_uuid);
743 ext2fs_init_csum_seed(fs);
744 fs->flags |= EXT2_FLAG_DIRTY;
745 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
751 * Check to see if we should disable the test_fs flag
753 profile_get_boolean(ctx->profile, "options",
754 "clear_test_fs_flag", 0, 1,
755 &clear_test_fs_flag);
756 if (!(ctx->options & E2F_OPT_READONLY) &&
757 clear_test_fs_flag &&
758 (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
759 (fs_proc_check("ext4") || check_for_modules("ext4"))) {
760 if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
761 fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
762 fs->flags |= EXT2_FLAG_DIRTY;
763 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
768 * For the Hurd, check to see if the filetype option is set,
769 * since it doesn't support it.
771 if (!(ctx->options & E2F_OPT_READONLY) &&
772 fs->super->s_creator_os == EXT2_OS_HURD &&
773 (fs->super->s_feature_incompat &
774 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
775 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
776 fs->super->s_feature_incompat &=
777 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
778 ext2fs_mark_super_dirty(fs);
779 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
784 * If we have any of the compatibility flags set, we need to have a
785 * revision 1 filesystem. Most kernels will not check the flags on
786 * a rev 0 filesystem and we may have corruption issues because of
787 * the incompatible changes to the filesystem.
789 if (!(ctx->options & E2F_OPT_READONLY) &&
790 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
791 (fs->super->s_feature_compat ||
792 fs->super->s_feature_ro_compat ||
793 fs->super->s_feature_incompat) &&
794 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
795 ext2fs_update_dynamic_rev(fs);
796 ext2fs_mark_super_dirty(fs);
797 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
801 * Clean up any orphan inodes, if present.
803 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
804 fs->super->s_state &= ~EXT2_VALID_FS;
805 ext2fs_mark_super_dirty(fs);
809 * Unfortunately, due to Windows' unfortunate design decision
810 * to configure the hardware clock to tick localtime, instead
811 * of the more proper and less error-prone UTC time, many
812 * users end up in the situation where the system clock is
813 * incorrectly set at the time when e2fsck is run.
815 * Historically this was usually due to some distributions
816 * having buggy init scripts and/or installers that didn't
817 * correctly detect this case and take appropriate
818 * countermeasures. However, it's still possible, despite the
819 * best efforts of init script and installer authors to not be
820 * able to detect this misconfiguration, usually due to a
821 * buggy or misconfigured virtualization manager or the
822 * installer not having access to a network time server during
823 * the installation process. So by default, we allow the
824 * superblock times to be fudged by up to 24 hours. This can
825 * be disabled by setting options.accept_time_fudge to the
826 * boolean value of false in e2fsck.conf. We also support
827 * options.buggy_init_scripts for backwards compatibility.
829 profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
830 0, 1, &accept_time_fudge);
831 profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
832 0, accept_time_fudge, &accept_time_fudge);
833 ctx->time_fudge = accept_time_fudge ? 86400 : 0;
835 profile_get_boolean(ctx->profile, "options", "broken_system_clock",
836 0, 0, &broken_system_clock);
839 * Check to see if the superblock last mount time or last
840 * write time is in the future.
842 if (!broken_system_clock &&
843 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
844 fs->super->s_mtime > (__u32) ctx->now) {
845 pctx.num = fs->super->s_mtime;
846 problem = PR_0_FUTURE_SB_LAST_MOUNT;
847 if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
848 problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
849 if (fix_problem(ctx, problem, &pctx)) {
850 fs->super->s_mtime = ctx->now;
851 fs->flags |= EXT2_FLAG_DIRTY;
854 if (!broken_system_clock &&
855 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
856 fs->super->s_wtime > (__u32) ctx->now) {
857 pctx.num = fs->super->s_wtime;
858 problem = PR_0_FUTURE_SB_LAST_WRITE;
859 if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
860 problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
861 if (fix_problem(ctx, problem, &pctx)) {
862 fs->super->s_wtime = ctx->now;
863 fs->flags |= EXT2_FLAG_DIRTY;
868 * Move the ext3 journal file, if necessary.
870 e2fsck_move_ext3_journal(ctx);
873 * Fix journal hint, if necessary
875 e2fsck_fix_ext3_journal_hint(ctx);
878 * Add dirhash hint if necessary
880 e2fsck_fix_dirhash_hint(ctx);
883 * Hide quota inodes if necessary.
885 e2fsck_hide_quota(ctx);
891 * Check to see if we should backup the master sb to the backup super
892 * blocks. Returns non-zero if the sb should be backed up.
896 * A few flags are set on the fly by the kernel, but only in the
897 * primary superblock. This is actually a bad thing, and we should
898 * try to discourage it in the future. In particular, for the newer
899 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
900 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
901 * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
902 * copying the primary superblock during online resize.
904 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
905 * unfortunately, we shouldn't ignore it since if it's not set in the
906 * backup, the extended attributes in the filesystem will be stripped
909 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
910 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
911 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
912 EXT3_FEATURE_INCOMPAT_RECOVER)
914 int check_backup_super_block(e2fsck_t ctx)
916 ext2_filsys fs = ctx->fs;
921 char buf[SUPERBLOCK_SIZE];
922 struct ext2_super_block *backup_sb;
925 * If we are already writing out the backup blocks, then we
926 * don't need to test. Also, if the filesystem is invalid, or
927 * the check was aborted or cancelled, we also don't want to
928 * do the backup. If the filesystem was opened read-only then
929 * we can't do the backup.
931 if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
932 !ext2fs_test_valid(fs) ||
933 (fs->super->s_state & EXT2_ERROR_FS) ||
934 (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
935 (ctx->options & E2F_OPT_READONLY))
938 for (g = 1; g < fs->group_desc_count; g++) {
939 if (!ext2fs_bg_has_super(fs, g))
942 sb = ext2fs_group_first_block2(fs, g);
944 retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
948 backup_sb = (struct ext2_super_block *) buf;
949 #ifdef WORDS_BIGENDIAN
950 ext2fs_swap_super(backup_sb);
952 if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
953 (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
954 ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
955 EXT2_MAX_BLOCK_LOG_SIZE) ||
956 (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
959 #define SUPER_INCOMPAT_DIFFERENT(x) \
960 ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
961 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
962 #define SUPER_RO_COMPAT_DIFFERENT(x) \
963 ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
964 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
965 #define SUPER_DIFFERENT(x) \
966 (fs->super->x != backup_sb->x)
968 if (SUPER_DIFFERENT(s_feature_compat) ||
969 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
970 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
971 SUPER_DIFFERENT(s_blocks_count) ||
972 SUPER_DIFFERENT(s_inodes_count) ||
973 memcmp(fs->super->s_uuid, backup_sb->s_uuid,
974 sizeof(fs->super->s_uuid)))