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 void 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; /* never get here! */
45 * helper function to release an inode
47 struct process_block_struct {
50 struct problem_context *pctx;
53 e2_blkcnt_t truncate_block;
59 static int release_inode_block(ext2_filsys fs,
62 blk64_t ref_blk EXT2FS_ATTR((unused)),
63 int ref_offset EXT2FS_ATTR((unused)),
66 struct process_block_struct *pb;
68 struct problem_context *pctx;
69 blk64_t blk = *block_nr;
72 pb = (struct process_block_struct *) priv_data;
77 pctx->blkcount = blockcnt;
79 if (HOLE_BLKADDR(blk))
82 if ((blk < fs->super->s_first_data_block) ||
83 (blk >= ext2fs_blocks_count(fs->super))) {
84 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
90 if (!ext2fs_test_block_bitmap2(fs->block_map, blk)) {
91 fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
96 * If we are deleting an orphan, then we leave the fields alone.
97 * If we are truncating an orphan, then update the inode fields
98 * and clean up any partial block data.
100 if (pb->truncating) {
102 * We only remove indirect blocks if they are
109 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
114 limit = fs->blocksize >> 2;
115 for (i = 0, bp = (blk_t *) pb->buf;
116 i < limit; i++, bp++)
121 * We don't remove direct blocks until we've reached
122 * the truncation block.
124 if (blockcnt >= 0 && blockcnt < pb->truncate_block)
127 * If part of the last block needs truncating, we do
130 if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
131 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
135 memset(pb->buf + pb->truncate_offset, 0,
136 fs->blocksize - pb->truncate_offset);
137 pb->errcode = io_channel_write_blk64(fs->io, blk, 1,
142 pb->truncated_blocks++;
144 retval |= BLOCK_CHANGED;
147 ext2fs_block_alloc_stats2(fs, blk, -1);
153 * This function releases an inode. Returns 1 if an inconsistency was
154 * found. If the inode has a link count, then it is being truncated and
157 static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
158 struct ext2_inode *inode, char *block_buf,
159 struct problem_context *pctx)
161 struct process_block_struct pb;
162 ext2_filsys fs = ctx->fs;
166 if (!ext2fs_inode_has_valid_blocks2(fs, inode))
169 pb.buf = block_buf + 3 * ctx->fs->blocksize;
174 if (inode->i_links_count) {
176 pb.truncate_block = (e2_blkcnt_t)
177 ((EXT2_I_SIZE(inode) + fs->blocksize - 1) /
179 pb.truncate_offset = inode->i_size % fs->blocksize;
182 pb.truncate_block = 0;
183 pb.truncate_offset = 0;
185 pb.truncated_blocks = 0;
186 retval = ext2fs_block_iterate3(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
187 block_buf, release_inode_block, &pb);
189 com_err("release_inode_blocks", retval,
190 _("while calling ext2fs_block_iterate for inode %d"),
197 /* Refresh the inode since ext2fs_block_iterate may have changed it */
198 e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks");
200 if (pb.truncated_blocks)
201 ext2fs_iblk_sub_blocks(fs, inode, pb.truncated_blocks);
203 if (ext2fs_file_acl_block(fs, inode)) {
204 retval = ext2fs_adjust_ea_refcount3(fs,
205 ext2fs_file_acl_block(fs, inode),
206 block_buf, -1, &count, ino);
207 if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
212 com_err("release_inode_blocks", retval,
213 _("while calling ext2fs_adjust_ea_refcount2 for inode %d"),
218 ext2fs_block_alloc_stats2(fs,
219 ext2fs_file_acl_block(fs, inode), -1);
222 ext2fs_file_acl_block_set(fs, inode, 0);
228 * This function releases all of the orphan inodes. It returns 1 if
229 * it hit some error, and 0 on success.
231 static int release_orphan_inodes(e2fsck_t ctx)
233 ext2_filsys fs = ctx->fs;
234 ext2_ino_t ino, next_ino;
235 struct ext2_inode inode;
236 struct problem_context pctx;
239 if ((ino = fs->super->s_last_orphan) == 0)
243 * Win or lose, we won't be using the head of the orphan inode
246 fs->super->s_last_orphan = 0;
247 ext2fs_mark_super_dirty(fs);
250 * If the filesystem contains errors, don't run the orphan
251 * list, since the orphan list can't be trusted; and we're
252 * going to be running a full e2fsck run anyway...
254 if (fs->super->s_state & EXT2_ERROR_FS)
257 if ((ino < EXT2_FIRST_INODE(fs->super)) ||
258 (ino > fs->super->s_inodes_count)) {
259 clear_problem_context(&pctx);
261 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
265 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
266 "block iterate buffer");
267 e2fsck_read_bitmaps(ctx);
270 e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
271 clear_problem_context(&pctx);
274 pctx.str = inode.i_links_count ? _("Truncating") :
277 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
279 next_ino = inode.i_dtime;
281 ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
282 (next_ino > fs->super->s_inodes_count))) {
284 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
288 if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
291 if (!inode.i_links_count) {
292 ext2fs_inode_alloc_stats2(fs, ino, -1,
293 LINUX_S_ISDIR(inode.i_mode));
295 inode.i_dtime = ctx->now;
299 e2fsck_write_inode(ctx, ino, &inode, "delete_file");
302 ext2fs_free_mem(&block_buf);
305 ext2fs_free_mem(&block_buf);
310 * Check the resize inode to make sure it is sane. We check both for
311 * the case where on-line resizing is not enabled (in which case the
312 * resize inode should be cleared) as well as the case where on-line
313 * resizing is enabled.
315 void check_resize_inode(e2fsck_t ctx)
317 ext2_filsys fs = ctx->fs;
318 struct ext2_inode inode;
319 struct problem_context pctx;
320 int i, gdt_off, ind_off;
323 blk_t expect; /* for resize inode, which is 32-bit only */
324 __u32 *dind_buf = 0, *ind_buf;
327 clear_problem_context(&pctx);
330 * If the resize inode feature isn't set, then
331 * s_reserved_gdt_blocks must be zero.
333 if (!(fs->super->s_feature_compat &
334 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
335 if (fs->super->s_reserved_gdt_blocks) {
336 pctx.num = fs->super->s_reserved_gdt_blocks;
337 if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
339 fs->super->s_reserved_gdt_blocks = 0;
340 ext2fs_mark_super_dirty(fs);
345 /* Read the resize inode */
346 pctx.ino = EXT2_RESIZE_INO;
347 retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
349 if (fs->super->s_feature_compat &
350 EXT2_FEATURE_COMPAT_RESIZE_INODE)
351 ctx->flags |= E2F_FLAG_RESIZE_INODE;
356 * If the resize inode feature isn't set, check to make sure
357 * the resize inode is cleared; then we're done.
359 if (!(fs->super->s_feature_compat &
360 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
361 for (i=0; i < EXT2_N_BLOCKS; i++) {
362 if (inode.i_block[i])
365 if ((i < EXT2_N_BLOCKS) &&
366 fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
367 memset(&inode, 0, sizeof(inode));
368 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
375 * The resize inode feature is enabled; check to make sure the
376 * only block in use is the double indirect block
378 blk = inode.i_block[EXT2_DIND_BLOCK];
379 for (i=0; i < EXT2_N_BLOCKS; i++) {
380 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
383 if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
384 !(inode.i_mode & LINUX_S_IFREG) ||
385 (blk < fs->super->s_first_data_block ||
386 blk >= ext2fs_blocks_count(fs->super))) {
387 resize_inode_invalid:
388 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
389 memset(&inode, 0, sizeof(inode));
390 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
392 ctx->flags |= E2F_FLAG_RESIZE_INODE;
394 if (!(ctx->options & E2F_OPT_READONLY)) {
395 fs->super->s_state &= ~EXT2_VALID_FS;
396 ext2fs_mark_super_dirty(fs);
400 dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
401 "resize dind buffer");
402 ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
404 retval = ext2fs_read_ind_block(fs, blk, dind_buf);
406 goto resize_inode_invalid;
408 gdt_off = fs->desc_blocks;
409 pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
410 if (fs->blocksize == 1024 && fs->super->s_first_data_block == 0)
411 pblk++; /* Deal with 1024 blocksize bigalloc fs */
412 for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
413 i++, gdt_off++, pblk++) {
414 gdt_off %= fs->blocksize/4;
415 if (dind_buf[gdt_off] != pblk)
416 goto resize_inode_invalid;
417 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
419 goto resize_inode_invalid;
421 for (j = 1; j < fs->group_desc_count; j++) {
422 if (!ext2fs_bg_has_super(fs, j))
424 expect = pblk + (j * fs->super->s_blocks_per_group);
425 if (ind_buf[ind_off] != expect)
426 goto resize_inode_invalid;
433 ext2fs_free_mem(&dind_buf);
438 * This function checks the dirhash signed/unsigned hint if necessary.
440 static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
442 struct ext2_super_block *sb = ctx->fs->super;
443 struct problem_context pctx;
446 if ((ctx->options & E2F_OPT_READONLY) ||
447 !(sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
448 (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
453 clear_problem_context(&pctx);
454 if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
455 if (((int) c) == -1) {
456 sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
458 sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
460 ext2fs_mark_super_dirty(ctx->fs);
465 void check_super_block(e2fsck_t ctx)
467 ext2_filsys fs = ctx->fs;
468 blk64_t first_block, last_block;
469 struct ext2_super_block *sb = fs->super;
470 unsigned int ipg_max;
472 blk64_t blocks_per_group = fs->super->s_blocks_per_group;
473 __u32 bpg_max, cpg_max;
474 int inodes_per_block;
476 int accept_time_fudge;
477 int broken_system_clock;
480 struct problem_context pctx;
481 blk64_t free_blocks = 0;
482 ino_t free_inodes = 0;
483 int csum_flag, clear_test_fs_flag;
485 inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
486 ipg_max = inodes_per_block * (blocks_per_group - 4);
487 if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
488 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
489 cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
490 if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
491 cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
492 bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
493 if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
494 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
496 ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
497 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
498 ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
499 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
500 ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
501 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
503 clear_problem_context(&pctx);
506 * Verify the super block constants...
508 check_super_value(ctx, "inodes_count", sb->s_inodes_count,
510 check_super_value(ctx, "blocks_count", ext2fs_blocks_count(sb),
512 check_super_value(ctx, "first_data_block", sb->s_first_data_block,
513 MAX_CHECK, 0, ext2fs_blocks_count(sb));
514 check_super_value(ctx, "log_block_size", sb->s_log_block_size,
515 MIN_CHECK | MAX_CHECK, 0,
516 EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
517 check_super_value(ctx, "log_cluster_size",
518 sb->s_log_cluster_size,
519 MIN_CHECK | MAX_CHECK, sb->s_log_block_size,
520 (EXT2_MAX_CLUSTER_LOG_SIZE -
521 EXT2_MIN_CLUSTER_LOG_SIZE));
522 check_super_value(ctx, "clusters_per_group", sb->s_clusters_per_group,
523 MIN_CHECK | MAX_CHECK, 8, cpg_max);
524 check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
525 MIN_CHECK | MAX_CHECK, 8, bpg_max);
526 check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
527 MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
528 check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
529 MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2);
530 check_super_value(ctx, "reserved_gdt_blocks",
531 sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
532 fs->blocksize / sizeof(__u32));
533 check_super_value(ctx, "desc_size",
534 sb->s_desc_size, MAX_CHECK | LOG2_CHECK, 0,
536 if (sb->s_rev_level > EXT2_GOOD_OLD_REV)
537 check_super_value(ctx, "first_ino", sb->s_first_ino,
538 MIN_CHECK | MAX_CHECK,
539 EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count);
540 inode_size = EXT2_INODE_SIZE(sb);
541 check_super_value(ctx, "inode_size",
542 inode_size, MIN_CHECK | MAX_CHECK | LOG2_CHECK,
543 EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize);
544 if (sb->s_blocks_per_group != (sb->s_clusters_per_group *
545 EXT2FS_CLUSTER_RATIO(fs))) {
546 pctx.num = sb->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs);
547 pctx.str = "block_size";
548 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
549 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
553 if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
554 (ctx->num_blocks < ext2fs_blocks_count(sb))) {
555 pctx.blk = ext2fs_blocks_count(sb);
556 pctx.blk2 = ctx->num_blocks;
557 if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
558 ctx->flags |= E2F_FLAG_ABORT;
563 should_be = (sb->s_log_block_size == 0 &&
564 EXT2FS_CLUSTER_RATIO(fs) == 1) ? 1 : 0;
565 if (sb->s_first_data_block != should_be) {
566 pctx.blk = sb->s_first_data_block;
567 pctx.blk2 = should_be;
568 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
569 ctx->flags |= E2F_FLAG_ABORT;
573 should_be = sb->s_inodes_per_group * fs->group_desc_count;
574 if (sb->s_inodes_count != should_be) {
575 pctx.ino = sb->s_inodes_count;
576 pctx.ino2 = should_be;
577 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
578 sb->s_inodes_count = should_be;
579 ext2fs_mark_super_dirty(fs);
583 /* Are metadata_csum and uninit_bg both set? */
584 if (EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
585 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) &&
586 EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
587 EXT4_FEATURE_RO_COMPAT_GDT_CSUM) &&
588 fix_problem(ctx, PR_0_META_AND_GDT_CSUM_SET, &pctx)) {
589 fs->super->s_feature_ro_compat &=
590 ~EXT4_FEATURE_RO_COMPAT_GDT_CSUM;
591 ext2fs_mark_super_dirty(fs);
592 for (i = 0; i < fs->group_desc_count; i++)
593 ext2fs_group_desc_csum_set(fs, i);
596 /* Is 64bit set and extents unset? */
597 if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
598 EXT4_FEATURE_INCOMPAT_64BIT) &&
599 !EXT2_HAS_INCOMPAT_FEATURE(fs->super,
600 EXT3_FEATURE_INCOMPAT_EXTENTS) &&
601 fix_problem(ctx, PR_0_64BIT_WITHOUT_EXTENTS, &pctx)) {
602 fs->super->s_feature_incompat |=
603 EXT3_FEATURE_INCOMPAT_EXTENTS;
604 ext2fs_mark_super_dirty(fs);
608 * Verify the group descriptors....
610 first_block = sb->s_first_data_block;
611 last_block = ext2fs_blocks_count(sb)-1;
613 csum_flag = ext2fs_has_group_desc_csum(fs);
614 for (i = 0; i < fs->group_desc_count; i++) {
617 if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
618 EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
619 first_block = ext2fs_group_first_block2(fs, i);
620 last_block = ext2fs_group_last_block2(fs, i);
623 if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
624 (ext2fs_block_bitmap_loc(fs, i) > last_block)) {
625 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
626 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
627 ext2fs_block_bitmap_loc_set(fs, i, 0);
629 if (ext2fs_block_bitmap_loc(fs, i) == 0) {
630 ctx->invalid_block_bitmap_flag[i]++;
631 ctx->invalid_bitmaps++;
633 if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
634 (ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
635 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
636 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
637 ext2fs_inode_bitmap_loc_set(fs, i, 0);
639 if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
640 ctx->invalid_inode_bitmap_flag[i]++;
641 ctx->invalid_bitmaps++;
643 if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
644 ((ext2fs_inode_table_loc(fs, i) +
645 fs->inode_blocks_per_group - 1) > last_block)) {
646 pctx.blk = ext2fs_inode_table_loc(fs, i);
647 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
648 ext2fs_inode_table_loc_set(fs, i, 0);
650 if (ext2fs_inode_table_loc(fs, i) == 0) {
651 ctx->invalid_inode_table_flag[i]++;
652 ctx->invalid_bitmaps++;
654 free_blocks += ext2fs_bg_free_blocks_count(fs, i);
655 free_inodes += ext2fs_bg_free_inodes_count(fs, i);
657 if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
658 (ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
659 (ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
660 ext2fs_unmark_valid(fs);
663 if (!ext2fs_group_desc_csum_verify(fs, i)) {
664 pctx.csum1 = ext2fs_bg_checksum(fs, i);
665 pctx.csum2 = ext2fs_group_desc_csum(fs, i);
666 if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
667 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
668 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
669 ext2fs_bg_itable_unused_set(fs, i, 0);
672 ext2fs_unmark_valid(fs);
676 (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
677 ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
678 ext2fs_bg_itable_unused(fs, i) != 0)) {
679 if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
680 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
681 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
682 ext2fs_bg_itable_unused_set(fs, i, 0);
685 ext2fs_unmark_valid(fs);
688 if (i == fs->group_desc_count - 1 &&
689 ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
690 if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
691 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
694 ext2fs_unmark_valid(fs);
698 (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
699 ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
700 pctx.blk = ext2fs_bg_itable_unused(fs, i);
701 if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
702 ext2fs_bg_itable_unused_set(fs, i, 0);
705 ext2fs_unmark_valid(fs);
709 ext2fs_group_desc_csum_set(fs, i);
710 /* If the user aborts e2fsck by typing ^C, stop right away */
711 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
715 ctx->free_blocks = EXT2FS_C2B(fs, free_blocks);
716 ctx->free_inodes = free_inodes;
718 if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
719 (sb->s_free_inodes_count > sb->s_inodes_count))
720 ext2fs_unmark_valid(fs);
724 * If we have invalid bitmaps, set the error state of the
727 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
728 sb->s_state &= ~EXT2_VALID_FS;
729 ext2fs_mark_super_dirty(fs);
732 clear_problem_context(&pctx);
734 #ifndef EXT2_SKIP_UUID
736 * If the UUID field isn't assigned, assign it.
737 * Skip if checksums are enabled and the filesystem is mounted,
738 * if the id changes under the kernel remounting rw may fail.
740 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid) &&
741 (!csum_flag || !(ctx->mount_flags & EXT2_MF_MOUNTED))) {
742 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
743 uuid_generate(sb->s_uuid);
744 ext2fs_init_csum_seed(fs);
745 fs->flags |= EXT2_FLAG_DIRTY;
746 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
752 * Check to see if we should disable the test_fs flag
754 profile_get_boolean(ctx->profile, "options",
755 "clear_test_fs_flag", 0, 1,
756 &clear_test_fs_flag);
757 if (!(ctx->options & E2F_OPT_READONLY) &&
758 clear_test_fs_flag &&
759 (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
760 (fs_proc_check("ext4") || check_for_modules("ext4"))) {
761 if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
762 fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
763 fs->flags |= EXT2_FLAG_DIRTY;
764 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
769 * For the Hurd, check to see if the filetype option is set,
770 * since it doesn't support it.
772 if (!(ctx->options & E2F_OPT_READONLY) &&
773 fs->super->s_creator_os == EXT2_OS_HURD &&
774 (fs->super->s_feature_incompat &
775 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
776 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
777 fs->super->s_feature_incompat &=
778 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
779 ext2fs_mark_super_dirty(fs);
780 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
785 * If we have any of the compatibility flags set, we need to have a
786 * revision 1 filesystem. Most kernels will not check the flags on
787 * a rev 0 filesystem and we may have corruption issues because of
788 * the incompatible changes to the filesystem.
790 if (!(ctx->options & E2F_OPT_READONLY) &&
791 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
792 (fs->super->s_feature_compat ||
793 fs->super->s_feature_ro_compat ||
794 fs->super->s_feature_incompat) &&
795 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
796 ext2fs_update_dynamic_rev(fs);
797 ext2fs_mark_super_dirty(fs);
798 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
802 * Clean up any orphan inodes, if present.
804 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
805 fs->super->s_state &= ~EXT2_VALID_FS;
806 ext2fs_mark_super_dirty(fs);
810 * Unfortunately, due to Windows' unfortunate design decision
811 * to configure the hardware clock to tick localtime, instead
812 * of the more proper and less error-prone UTC time, many
813 * users end up in the situation where the system clock is
814 * incorrectly set at the time when e2fsck is run.
816 * Historically this was usually due to some distributions
817 * having buggy init scripts and/or installers that didn't
818 * correctly detect this case and take appropriate
819 * countermeasures. However, it's still possible, despite the
820 * best efforts of init script and installer authors to not be
821 * able to detect this misconfiguration, usually due to a
822 * buggy or misconfigured virtualization manager or the
823 * installer not having access to a network time server during
824 * the installation process. So by default, we allow the
825 * superblock times to be fudged by up to 24 hours. This can
826 * be disabled by setting options.accept_time_fudge to the
827 * boolean value of false in e2fsck.conf. We also support
828 * options.buggy_init_scripts for backwards compatibility.
830 profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
831 0, 1, &accept_time_fudge);
832 profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
833 0, accept_time_fudge, &accept_time_fudge);
834 ctx->time_fudge = accept_time_fudge ? 86400 : 0;
836 profile_get_boolean(ctx->profile, "options", "broken_system_clock",
837 0, 0, &broken_system_clock);
840 * Check to see if the superblock last mount time or last
841 * write time is in the future.
843 if (!broken_system_clock &&
844 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
845 fs->super->s_mtime > (__u32) ctx->now) {
846 pctx.num = fs->super->s_mtime;
847 problem = PR_0_FUTURE_SB_LAST_MOUNT;
848 if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
849 problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
850 if (fix_problem(ctx, problem, &pctx)) {
851 fs->super->s_mtime = ctx->now;
852 fs->flags |= EXT2_FLAG_DIRTY;
855 if (!broken_system_clock &&
856 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
857 fs->super->s_wtime > (__u32) ctx->now) {
858 pctx.num = fs->super->s_wtime;
859 problem = PR_0_FUTURE_SB_LAST_WRITE;
860 if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
861 problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
862 if (fix_problem(ctx, problem, &pctx)) {
863 fs->super->s_wtime = ctx->now;
864 fs->flags |= EXT2_FLAG_DIRTY;
869 * Move the ext3 journal file, if necessary.
871 e2fsck_move_ext3_journal(ctx);
874 * Fix journal hint, if necessary
876 e2fsck_fix_ext3_journal_hint(ctx);
879 * Add dirhash hint if necessary
881 e2fsck_fix_dirhash_hint(ctx);
884 * Hide quota inodes if necessary.
886 e2fsck_hide_quota(ctx);
892 * Check to see if we should backup the master sb to the backup super
893 * blocks. Returns non-zero if the sb should be backed up.
897 * A few flags are set on the fly by the kernel, but only in the
898 * primary superblock. This is actually a bad thing, and we should
899 * try to discourage it in the future. In particular, for the newer
900 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
901 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
902 * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
903 * copying the primary superblock during online resize.
905 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
906 * unfortunately, we shouldn't ignore it since if it's not set in the
907 * backup, the extended attributes in the filesystem will be stripped
910 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
911 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
912 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
913 EXT3_FEATURE_INCOMPAT_RECOVER)
915 int check_backup_super_block(e2fsck_t ctx)
917 ext2_filsys fs = ctx->fs;
922 char buf[SUPERBLOCK_SIZE];
923 struct ext2_super_block *backup_sb;
926 * If we are already writing out the backup blocks, then we
927 * don't need to test. Also, if the filesystem is invalid, or
928 * the check was aborted or cancelled, we also don't want to
929 * do the backup. If the filesystem was opened read-only then
930 * we can't do the backup.
932 if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
933 !ext2fs_test_valid(fs) ||
934 (fs->super->s_state & EXT2_ERROR_FS) ||
935 (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
936 (ctx->options & E2F_OPT_READONLY))
939 for (g = 1; g < fs->group_desc_count; g++) {
940 if (!ext2fs_bg_has_super(fs, g))
943 sb = ext2fs_group_first_block2(fs, g);
945 retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
949 backup_sb = (struct ext2_super_block *) buf;
950 #ifdef WORDS_BIGENDIAN
951 ext2fs_swap_super(backup_sb);
953 if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
954 (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
955 ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
956 EXT2_MAX_BLOCK_LOG_SIZE) ||
957 (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
960 #define SUPER_INCOMPAT_DIFFERENT(x) \
961 ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
962 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
963 #define SUPER_RO_COMPAT_DIFFERENT(x) \
964 ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
965 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
966 #define SUPER_DIFFERENT(x) \
967 (fs->super->x != backup_sb->x)
969 if (SUPER_DIFFERENT(s_feature_compat) ||
970 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
971 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
972 SUPER_DIFFERENT(s_blocks_count) ||
973 SUPER_DIFFERENT(s_blocks_count_hi) ||
974 SUPER_DIFFERENT(s_inodes_count) ||
975 memcmp(fs->super->s_uuid, backup_sb->s_uuid,
976 sizeof(fs->super->s_uuid)))