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_refcount2(fs,
205 ext2fs_file_acl_block(fs, inode),
206 block_buf, -1, &count);
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 /* Is 64bit set and extents unset? */
584 if (EXT2_HAS_INCOMPAT_FEATURE(fs->super,
585 EXT4_FEATURE_INCOMPAT_64BIT) &&
586 !EXT2_HAS_INCOMPAT_FEATURE(fs->super,
587 EXT3_FEATURE_INCOMPAT_EXTENTS) &&
588 fix_problem(ctx, PR_0_64BIT_WITHOUT_EXTENTS, &pctx)) {
589 fs->super->s_feature_incompat |=
590 EXT3_FEATURE_INCOMPAT_EXTENTS;
591 ext2fs_mark_super_dirty(fs);
595 * Verify the group descriptors....
597 first_block = sb->s_first_data_block;
598 last_block = ext2fs_blocks_count(sb)-1;
600 csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
601 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
602 for (i = 0; i < fs->group_desc_count; i++) {
605 if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
606 EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
607 first_block = ext2fs_group_first_block2(fs, i);
608 last_block = ext2fs_group_last_block2(fs, i);
611 if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
612 (ext2fs_block_bitmap_loc(fs, i) > last_block)) {
613 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
614 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
615 ext2fs_block_bitmap_loc_set(fs, i, 0);
617 if (ext2fs_block_bitmap_loc(fs, i) == 0) {
618 ctx->invalid_block_bitmap_flag[i]++;
619 ctx->invalid_bitmaps++;
621 if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
622 (ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
623 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
624 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
625 ext2fs_inode_bitmap_loc_set(fs, i, 0);
627 if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
628 ctx->invalid_inode_bitmap_flag[i]++;
629 ctx->invalid_bitmaps++;
631 if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
632 ((ext2fs_inode_table_loc(fs, i) +
633 fs->inode_blocks_per_group - 1) > last_block)) {
634 pctx.blk = ext2fs_inode_table_loc(fs, i);
635 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
636 ext2fs_inode_table_loc_set(fs, i, 0);
638 if (ext2fs_inode_table_loc(fs, i) == 0) {
639 ctx->invalid_inode_table_flag[i]++;
640 ctx->invalid_bitmaps++;
642 free_blocks += ext2fs_bg_free_blocks_count(fs, i);
643 free_inodes += ext2fs_bg_free_inodes_count(fs, i);
645 if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
646 (ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
647 (ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
648 ext2fs_unmark_valid(fs);
651 if (!ext2fs_group_desc_csum_verify(fs, i)) {
652 pctx.csum1 = ext2fs_bg_checksum(fs, i);
653 pctx.csum2 = ext2fs_group_desc_csum(fs, i);
654 if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
655 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
656 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
657 ext2fs_bg_itable_unused_set(fs, i, 0);
660 ext2fs_unmark_valid(fs);
664 (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
665 ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
666 ext2fs_bg_itable_unused(fs, i) != 0)) {
667 if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
668 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
669 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
670 ext2fs_bg_itable_unused_set(fs, i, 0);
673 ext2fs_unmark_valid(fs);
676 if (i == fs->group_desc_count - 1 &&
677 ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
678 if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
679 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
682 ext2fs_unmark_valid(fs);
686 (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
687 ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
688 pctx.blk = ext2fs_bg_itable_unused(fs, i);
689 if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
690 ext2fs_bg_itable_unused_set(fs, i, 0);
693 ext2fs_unmark_valid(fs);
697 ext2fs_group_desc_csum_set(fs, i);
698 /* If the user aborts e2fsck by typing ^C, stop right away */
699 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
703 ctx->free_blocks = EXT2FS_C2B(fs, free_blocks);
704 ctx->free_inodes = free_inodes;
706 if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
707 (sb->s_free_inodes_count > sb->s_inodes_count))
708 ext2fs_unmark_valid(fs);
712 * If we have invalid bitmaps, set the error state of the
715 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
716 sb->s_state &= ~EXT2_VALID_FS;
717 ext2fs_mark_super_dirty(fs);
720 clear_problem_context(&pctx);
722 #ifndef EXT2_SKIP_UUID
724 * If the UUID field isn't assigned, assign it.
726 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
727 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
728 uuid_generate(sb->s_uuid);
729 fs->flags |= EXT2_FLAG_DIRTY;
730 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
736 * Check to see if we should disable the test_fs flag
738 profile_get_boolean(ctx->profile, "options",
739 "clear_test_fs_flag", 0, 1,
740 &clear_test_fs_flag);
741 if (!(ctx->options & E2F_OPT_READONLY) &&
742 clear_test_fs_flag &&
743 (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
744 (fs_proc_check("ext4") || check_for_modules("ext4"))) {
745 if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
746 fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
747 fs->flags |= EXT2_FLAG_DIRTY;
748 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
753 * For the Hurd, check to see if the filetype option is set,
754 * since it doesn't support it.
756 if (!(ctx->options & E2F_OPT_READONLY) &&
757 fs->super->s_creator_os == EXT2_OS_HURD &&
758 (fs->super->s_feature_incompat &
759 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
760 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
761 fs->super->s_feature_incompat &=
762 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
763 ext2fs_mark_super_dirty(fs);
764 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
769 * If we have any of the compatibility flags set, we need to have a
770 * revision 1 filesystem. Most kernels will not check the flags on
771 * a rev 0 filesystem and we may have corruption issues because of
772 * the incompatible changes to the filesystem.
774 if (!(ctx->options & E2F_OPT_READONLY) &&
775 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
776 (fs->super->s_feature_compat ||
777 fs->super->s_feature_ro_compat ||
778 fs->super->s_feature_incompat) &&
779 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
780 ext2fs_update_dynamic_rev(fs);
781 ext2fs_mark_super_dirty(fs);
782 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
786 * Clean up any orphan inodes, if present.
788 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
789 fs->super->s_state &= ~EXT2_VALID_FS;
790 ext2fs_mark_super_dirty(fs);
794 * Unfortunately, due to Windows' unfortunate design decision
795 * to configure the hardware clock to tick localtime, instead
796 * of the more proper and less error-prone UTC time, many
797 * users end up in the situation where the system clock is
798 * incorrectly set at the time when e2fsck is run.
800 * Historically this was usually due to some distributions
801 * having buggy init scripts and/or installers that didn't
802 * correctly detect this case and take appropriate
803 * countermeasures. However, it's still possible, despite the
804 * best efforts of init script and installer authors to not be
805 * able to detect this misconfiguration, usually due to a
806 * buggy or misconfigured virtualization manager or the
807 * installer not having access to a network time server during
808 * the installation process. So by default, we allow the
809 * superblock times to be fudged by up to 24 hours. This can
810 * be disabled by setting options.accept_time_fudge to the
811 * boolean value of false in e2fsck.conf. We also support
812 * options.buggy_init_scripts for backwards compatibility.
814 profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
815 0, 1, &accept_time_fudge);
816 profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
817 0, accept_time_fudge, &accept_time_fudge);
818 ctx->time_fudge = accept_time_fudge ? 86400 : 0;
820 profile_get_boolean(ctx->profile, "options", "broken_system_clock",
821 0, 0, &broken_system_clock);
824 * Check to see if the superblock last mount time or last
825 * write time is in the future.
827 if (!broken_system_clock &&
828 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
829 fs->super->s_mtime > (__u32) ctx->now) {
830 pctx.num = fs->super->s_mtime;
831 problem = PR_0_FUTURE_SB_LAST_MOUNT;
832 if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
833 problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
834 if (fix_problem(ctx, problem, &pctx)) {
835 fs->super->s_mtime = ctx->now;
836 fs->flags |= EXT2_FLAG_DIRTY;
839 if (!broken_system_clock &&
840 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
841 fs->super->s_wtime > (__u32) ctx->now) {
842 pctx.num = fs->super->s_wtime;
843 problem = PR_0_FUTURE_SB_LAST_WRITE;
844 if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
845 problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
846 if (fix_problem(ctx, problem, &pctx)) {
847 fs->super->s_wtime = ctx->now;
848 fs->flags |= EXT2_FLAG_DIRTY;
853 * Move the ext3 journal file, if necessary.
855 e2fsck_move_ext3_journal(ctx);
858 * Fix journal hint, if necessary
860 e2fsck_fix_ext3_journal_hint(ctx);
863 * Add dirhash hint if necessary
865 e2fsck_fix_dirhash_hint(ctx);
868 * Hide quota inodes if necessary.
870 e2fsck_hide_quota(ctx);
876 * Check to see if we should backup the master sb to the backup super
877 * blocks. Returns non-zero if the sb should be backed up.
881 * A few flags are set on the fly by the kernel, but only in the
882 * primary superblock. This is actually a bad thing, and we should
883 * try to discourage it in the future. In particular, for the newer
884 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
885 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
886 * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
887 * copying the primary superblock during online resize.
889 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
890 * unfortunately, we shouldn't ignore it since if it's not set in the
891 * backup, the extended attributes in the filesystem will be stripped
894 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
895 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
896 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
897 EXT3_FEATURE_INCOMPAT_RECOVER)
899 int check_backup_super_block(e2fsck_t ctx)
901 ext2_filsys fs = ctx->fs;
906 char buf[SUPERBLOCK_SIZE];
907 struct ext2_super_block *backup_sb;
910 * If we are already writing out the backup blocks, then we
911 * don't need to test. Also, if the filesystem is invalid, or
912 * the check was aborted or cancelled, we also don't want to
913 * do the backup. If the filesystem was opened read-only then
914 * we can't do the backup.
916 if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
917 !ext2fs_test_valid(fs) ||
918 (fs->super->s_state & EXT2_ERROR_FS) ||
919 (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
920 (ctx->options & E2F_OPT_READONLY))
923 for (g = 1; g < fs->group_desc_count; g++) {
924 if (!ext2fs_bg_has_super(fs, g))
927 sb = ext2fs_group_first_block2(fs, g);
929 retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
933 backup_sb = (struct ext2_super_block *) buf;
934 #ifdef WORDS_BIGENDIAN
935 ext2fs_swap_super(backup_sb);
937 if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
938 (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
939 ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
940 EXT2_MAX_BLOCK_LOG_SIZE) ||
941 (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
944 #define SUPER_INCOMPAT_DIFFERENT(x) \
945 ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
946 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
947 #define SUPER_RO_COMPAT_DIFFERENT(x) \
948 ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
949 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
950 #define SUPER_DIFFERENT(x) \
951 (fs->super->x != backup_sb->x)
953 if (SUPER_DIFFERENT(s_feature_compat) ||
954 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
955 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
956 SUPER_DIFFERENT(s_blocks_count) ||
957 SUPER_DIFFERENT(s_blocks_count_hi) ||
958 SUPER_DIFFERENT(s_inodes_count) ||
959 memcmp(fs->super->s_uuid, backup_sb->s_uuid,
960 sizeof(fs->super->s_uuid)))