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
16 #ifndef EXT2_SKIP_UUID
17 #include "uuid/uuid.h"
25 static void check_super_value(e2fsck_t ctx, const char *descr,
26 unsigned long value, int flags,
27 unsigned long min_val, unsigned long max_val)
29 struct problem_context pctx;
31 if (((flags & MIN_CHECK) && (value < min_val)) ||
32 ((flags & MAX_CHECK) && (value > max_val))) {
33 clear_problem_context(&pctx);
36 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
37 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
42 * helper function to release an inode
44 struct process_block_struct {
47 struct problem_context *pctx;
50 e2_blkcnt_t truncate_block;
56 static int release_inode_block(ext2_filsys fs,
59 blk64_t ref_blk EXT2FS_ATTR((unused)),
60 int ref_offset EXT2FS_ATTR((unused)),
63 struct process_block_struct *pb;
65 struct problem_context *pctx;
66 blk64_t blk = *block_nr;
69 pb = (struct process_block_struct *) priv_data;
74 pctx->blkcount = blockcnt;
76 if (HOLE_BLKADDR(blk))
79 if ((blk < fs->super->s_first_data_block) ||
80 (blk >= ext2fs_blocks_count(fs->super))) {
81 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
87 if (!ext2fs_test_block_bitmap2(fs->block_map, blk)) {
88 fix_problem(ctx, PR_0_ORPHAN_ALREADY_CLEARED_BLOCK, pctx);
93 * If we are deleting an orphan, then we leave the fields alone.
94 * If we are truncating an orphan, then update the inode fields
95 * and clean up any partial block data.
99 * We only remove indirect blocks if they are
106 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
111 limit = fs->blocksize >> 2;
112 for (i = 0, bp = (blk_t *) pb->buf;
113 i < limit; i++, bp++)
118 * We don't remove direct blocks until we've reached
119 * the truncation block.
121 if (blockcnt >= 0 && blockcnt < pb->truncate_block)
124 * If part of the last block needs truncating, we do
127 if ((blockcnt == pb->truncate_block) && pb->truncate_offset) {
128 pb->errcode = io_channel_read_blk64(fs->io, blk, 1,
132 memset(pb->buf + pb->truncate_offset, 0,
133 fs->blocksize - pb->truncate_offset);
134 pb->errcode = io_channel_write_blk64(fs->io, blk, 1,
139 pb->truncated_blocks++;
141 retval |= BLOCK_CHANGED;
144 ext2fs_block_alloc_stats2(fs, blk, -1);
149 * This function releases an inode. Returns 1 if an inconsistency was
150 * found. If the inode has a link count, then it is being truncated and
153 static int release_inode_blocks(e2fsck_t ctx, ext2_ino_t ino,
154 struct ext2_inode *inode, char *block_buf,
155 struct problem_context *pctx)
157 struct process_block_struct pb;
158 ext2_filsys fs = ctx->fs;
162 if (!ext2fs_inode_has_valid_blocks(inode))
165 pb.buf = block_buf + 3 * ctx->fs->blocksize;
170 if (inode->i_links_count) {
172 pb.truncate_block = (e2_blkcnt_t)
173 ((((long long)inode->i_size_high << 32) +
174 inode->i_size + fs->blocksize - 1) /
176 pb.truncate_offset = inode->i_size % fs->blocksize;
179 pb.truncate_block = 0;
180 pb.truncate_offset = 0;
182 pb.truncated_blocks = 0;
183 retval = ext2fs_block_iterate3(fs, ino, BLOCK_FLAG_DEPTH_TRAVERSE,
184 block_buf, release_inode_block, &pb);
186 com_err("release_inode_blocks", retval,
187 _("while calling ext2fs_block_iterate for inode %d"),
194 /* Refresh the inode since ext2fs_block_iterate may have changed it */
195 e2fsck_read_inode(ctx, ino, inode, "release_inode_blocks");
197 if (pb.truncated_blocks)
198 ext2fs_iblk_sub_blocks(fs, inode, pb.truncated_blocks);
200 if (ext2fs_file_acl_block(inode)) {
201 retval = ext2fs_adjust_ea_refcount2(fs, ext2fs_file_acl_block(inode),
202 block_buf, -1, &count);
203 if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
208 com_err("release_inode_blocks", retval,
209 _("while calling ext2fs_adjust_ea_refcount2 for inode %d"),
214 ext2fs_block_alloc_stats2(fs,
215 ext2fs_file_acl_block(inode),
217 ext2fs_file_acl_block_set(inode, 0);
223 * This function releases all of the orphan inodes. It returns 1 if
224 * it hit some error, and 0 on success.
226 static int release_orphan_inodes(e2fsck_t ctx)
228 ext2_filsys fs = ctx->fs;
229 ext2_ino_t ino, next_ino;
230 struct ext2_inode inode;
231 struct problem_context pctx;
234 if ((ino = fs->super->s_last_orphan) == 0)
238 * Win or lose, we won't be using the head of the orphan inode
241 fs->super->s_last_orphan = 0;
242 ext2fs_mark_super_dirty(fs);
245 * If the filesystem contains errors, don't run the orphan
246 * list, since the orphan list can't be trusted; and we're
247 * going to be running a full e2fsck run anyway...
249 if (fs->super->s_state & EXT2_ERROR_FS)
252 if ((ino < EXT2_FIRST_INODE(fs->super)) ||
253 (ino > fs->super->s_inodes_count)) {
254 clear_problem_context(&pctx);
256 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
260 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
261 "block iterate buffer");
262 e2fsck_read_bitmaps(ctx);
265 e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
266 clear_problem_context(&pctx);
269 pctx.str = inode.i_links_count ? _("Truncating") :
272 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
274 next_ino = inode.i_dtime;
276 ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
277 (next_ino > fs->super->s_inodes_count))) {
279 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
283 if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
286 if (!inode.i_links_count) {
287 ext2fs_inode_alloc_stats2(fs, ino, -1,
288 LINUX_S_ISDIR(inode.i_mode));
289 inode.i_dtime = ctx->now;
293 e2fsck_write_inode(ctx, ino, &inode, "delete_file");
296 ext2fs_free_mem(&block_buf);
299 ext2fs_free_mem(&block_buf);
304 * Check the resize inode to make sure it is sane. We check both for
305 * the case where on-line resizing is not enabled (in which case the
306 * resize inode should be cleared) as well as the case where on-line
307 * resizing is enabled.
309 void check_resize_inode(e2fsck_t ctx)
311 ext2_filsys fs = ctx->fs;
312 struct ext2_inode inode;
313 struct problem_context pctx;
314 int i, gdt_off, ind_off;
316 blk64_t blk, pblk, expect;
317 __u32 *dind_buf = 0, *ind_buf;
320 clear_problem_context(&pctx);
323 * If the resize inode feature isn't set, then
324 * s_reserved_gdt_blocks must be zero.
326 if (!(fs->super->s_feature_compat &
327 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
328 if (fs->super->s_reserved_gdt_blocks) {
329 pctx.num = fs->super->s_reserved_gdt_blocks;
330 if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
332 fs->super->s_reserved_gdt_blocks = 0;
333 ext2fs_mark_super_dirty(fs);
338 /* Read the resize inode */
339 pctx.ino = EXT2_RESIZE_INO;
340 retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
342 if (fs->super->s_feature_compat &
343 EXT2_FEATURE_COMPAT_RESIZE_INODE)
344 ctx->flags |= E2F_FLAG_RESIZE_INODE;
349 * If the resize inode feature isn't set, check to make sure
350 * the resize inode is cleared; then we're done.
352 if (!(fs->super->s_feature_compat &
353 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
354 for (i=0; i < EXT2_N_BLOCKS; i++) {
355 if (inode.i_block[i])
358 if ((i < EXT2_N_BLOCKS) &&
359 fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
360 memset(&inode, 0, sizeof(inode));
361 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
368 * The resize inode feature is enabled; check to make sure the
369 * only block in use is the double indirect block
371 blk = inode.i_block[EXT2_DIND_BLOCK];
372 for (i=0; i < EXT2_N_BLOCKS; i++) {
373 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
376 if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
377 !(inode.i_mode & LINUX_S_IFREG) ||
378 (blk < fs->super->s_first_data_block ||
379 blk >= ext2fs_blocks_count(fs->super))) {
380 resize_inode_invalid:
381 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
382 memset(&inode, 0, sizeof(inode));
383 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
385 ctx->flags |= E2F_FLAG_RESIZE_INODE;
387 if (!(ctx->options & E2F_OPT_READONLY)) {
388 fs->super->s_state &= ~EXT2_VALID_FS;
389 ext2fs_mark_super_dirty(fs);
393 dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
394 "resize dind buffer");
395 ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
397 retval = ext2fs_read_ind_block(fs, blk, dind_buf);
399 goto resize_inode_invalid;
401 gdt_off = fs->desc_blocks;
402 pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
403 for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
404 i++, gdt_off++, pblk++) {
405 gdt_off %= fs->blocksize/4;
406 if (dind_buf[gdt_off] != pblk)
407 goto resize_inode_invalid;
408 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
410 goto resize_inode_invalid;
412 for (j = 1; j < fs->group_desc_count; j++) {
413 if (!ext2fs_bg_has_super(fs, j))
415 expect = pblk + (j * fs->super->s_blocks_per_group);
416 if (ind_buf[ind_off] != expect)
417 goto resize_inode_invalid;
424 ext2fs_free_mem(&dind_buf);
429 * This function checks the dirhash signed/unsigned hint if necessary.
431 static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
433 struct ext2_super_block *sb = ctx->fs->super;
434 struct problem_context pctx;
437 if ((ctx->options & E2F_OPT_READONLY) ||
438 !(sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
439 (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
444 clear_problem_context(&pctx);
445 if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
446 if (((int) c) == -1) {
447 sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
449 sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
451 ext2fs_mark_super_dirty(ctx->fs);
456 void check_super_block(e2fsck_t ctx)
458 ext2_filsys fs = ctx->fs;
459 blk64_t first_block, last_block;
460 struct ext2_super_block *sb = fs->super;
462 blk64_t blocks_per_group = fs->super->s_blocks_per_group;
463 __u32 bpg_max, cpg_max;
464 int inodes_per_block;
467 int accept_time_fudge;
468 int broken_system_clock;
471 struct problem_context pctx;
472 blk64_t free_blocks = 0;
473 ino_t free_inodes = 0;
474 int csum_flag, clear_test_fs_flag;
476 inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
477 ipg_max = inodes_per_block * (blocks_per_group - 4);
478 if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
479 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
480 cpg_max = 8 * EXT2_BLOCK_SIZE(sb);
481 if (cpg_max > EXT2_MAX_CLUSTERS_PER_GROUP(sb))
482 cpg_max = EXT2_MAX_CLUSTERS_PER_GROUP(sb);
483 bpg_max = 8 * EXT2_BLOCK_SIZE(sb) * EXT2FS_CLUSTER_RATIO(fs);
484 if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
485 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
487 ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
488 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
489 ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
490 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
491 ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
492 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
494 clear_problem_context(&pctx);
497 * Verify the super block constants...
499 check_super_value(ctx, "inodes_count", sb->s_inodes_count,
501 check_super_value(ctx, "blocks_count", ext2fs_blocks_count(sb),
503 check_super_value(ctx, "first_data_block", sb->s_first_data_block,
504 MAX_CHECK, 0, ext2fs_blocks_count(sb));
505 check_super_value(ctx, "log_block_size", sb->s_log_block_size,
506 MIN_CHECK | MAX_CHECK, 0,
507 EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
508 check_super_value(ctx, "log_cluster_size",
509 sb->s_log_cluster_size,
510 MIN_CHECK | MAX_CHECK, sb->s_log_block_size,
511 (EXT2_MAX_CLUSTER_LOG_SIZE -
512 EXT2_MIN_CLUSTER_LOG_SIZE));
513 check_super_value(ctx, "clusters_per_group", sb->s_clusters_per_group,
514 MIN_CHECK | MAX_CHECK, 8, cpg_max);
515 check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
516 MIN_CHECK | MAX_CHECK, 8, bpg_max);
517 check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
518 MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
519 check_super_value(ctx, "r_blocks_count", ext2fs_r_blocks_count(sb),
520 MAX_CHECK, 0, ext2fs_blocks_count(sb) / 2);
521 check_super_value(ctx, "reserved_gdt_blocks",
522 sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
524 if (sb->s_rev_level > EXT2_GOOD_OLD_REV)
525 check_super_value(ctx, "first_ino", sb->s_first_ino,
526 MIN_CHECK | MAX_CHECK,
527 EXT2_GOOD_OLD_FIRST_INO, sb->s_inodes_count);
528 inode_size = EXT2_INODE_SIZE(sb);
529 check_super_value(ctx, "inode_size",
530 inode_size, MIN_CHECK | MAX_CHECK,
531 EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize);
532 if (sb->s_blocks_per_group != (sb->s_clusters_per_group *
533 EXT2FS_CLUSTER_RATIO(fs))) {
534 pctx.num = sb->s_clusters_per_group * EXT2FS_CLUSTER_RATIO(fs);
535 pctx.str = "block_size";
536 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
537 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
540 if (inode_size & (inode_size - 1)) {
541 pctx.num = inode_size;
542 pctx.str = "inode_size";
543 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
544 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
548 if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
549 (ctx->num_blocks < ext2fs_blocks_count(sb))) {
550 pctx.blk = ext2fs_blocks_count(sb);
551 pctx.blk2 = ctx->num_blocks;
552 if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
553 ctx->flags |= E2F_FLAG_ABORT;
558 should_be = (sb->s_log_block_size == 0) ? 1 : 0;
559 if (sb->s_first_data_block != should_be) {
560 pctx.blk = sb->s_first_data_block;
561 pctx.blk2 = should_be;
562 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
563 ctx->flags |= E2F_FLAG_ABORT;
567 should_be = sb->s_inodes_per_group * fs->group_desc_count;
568 if (sb->s_inodes_count != should_be) {
569 pctx.ino = sb->s_inodes_count;
570 pctx.ino2 = should_be;
571 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
572 sb->s_inodes_count = should_be;
573 ext2fs_mark_super_dirty(fs);
578 * Verify the group descriptors....
580 first_block = sb->s_first_data_block;
581 last_block = ext2fs_blocks_count(sb)-1;
583 csum_flag = EXT2_HAS_RO_COMPAT_FEATURE(fs->super,
584 EXT4_FEATURE_RO_COMPAT_GDT_CSUM);
585 for (i = 0; i < fs->group_desc_count; i++) {
588 if (!EXT2_HAS_INCOMPAT_FEATURE(fs->super,
589 EXT4_FEATURE_INCOMPAT_FLEX_BG)) {
590 first_block = ext2fs_group_first_block2(fs, i);
591 last_block = ext2fs_group_last_block2(fs, i);
594 if ((ext2fs_block_bitmap_loc(fs, i) < first_block) ||
595 (ext2fs_block_bitmap_loc(fs, i) > last_block)) {
596 pctx.blk = ext2fs_block_bitmap_loc(fs, i);
597 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
598 ext2fs_block_bitmap_loc_set(fs, i, 0);
600 if (ext2fs_block_bitmap_loc(fs, i) == 0) {
601 ctx->invalid_block_bitmap_flag[i]++;
602 ctx->invalid_bitmaps++;
604 if ((ext2fs_inode_bitmap_loc(fs, i) < first_block) ||
605 (ext2fs_inode_bitmap_loc(fs, i) > last_block)) {
606 pctx.blk = ext2fs_inode_bitmap_loc(fs, i);
607 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
608 ext2fs_inode_bitmap_loc_set(fs, i, 0);
610 if (ext2fs_inode_bitmap_loc(fs, i) == 0) {
611 ctx->invalid_inode_bitmap_flag[i]++;
612 ctx->invalid_bitmaps++;
614 if ((ext2fs_inode_table_loc(fs, i) < first_block) ||
615 ((ext2fs_inode_table_loc(fs, i) +
616 fs->inode_blocks_per_group - 1) > last_block)) {
617 pctx.blk = ext2fs_inode_table_loc(fs, i);
618 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
619 ext2fs_inode_table_loc_set(fs, i, 0);
621 if (ext2fs_inode_table_loc(fs, i) == 0) {
622 ctx->invalid_inode_table_flag[i]++;
623 ctx->invalid_bitmaps++;
625 free_blocks += ext2fs_bg_free_blocks_count(fs, i);
626 free_inodes += ext2fs_bg_free_inodes_count(fs, i);
628 if ((ext2fs_bg_free_blocks_count(fs, i) > sb->s_blocks_per_group) ||
629 (ext2fs_bg_free_inodes_count(fs, i) > sb->s_inodes_per_group) ||
630 (ext2fs_bg_used_dirs_count(fs, i) > sb->s_inodes_per_group))
631 ext2fs_unmark_valid(fs);
634 if (!ext2fs_group_desc_csum_verify(fs, i)) {
635 if (fix_problem(ctx, PR_0_GDT_CSUM, &pctx)) {
636 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
637 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
638 ext2fs_bg_itable_unused_set(fs, i, 0);
641 ext2fs_unmark_valid(fs);
645 (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) ||
646 ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT) ||
647 ext2fs_bg_itable_unused(fs, i) != 0)) {
648 if (fix_problem(ctx, PR_0_GDT_UNINIT, &pctx)) {
649 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
650 ext2fs_bg_flags_clear(fs, i, EXT2_BG_INODE_UNINIT);
651 ext2fs_bg_itable_unused_set(fs, i, 0);
654 ext2fs_unmark_valid(fs);
657 if (i == fs->group_desc_count - 1 &&
658 ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT)) {
659 if (fix_problem(ctx, PR_0_BB_UNINIT_LAST, &pctx)) {
660 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
663 ext2fs_unmark_valid(fs);
666 if (ext2fs_bg_flags_test(fs, i, EXT2_BG_BLOCK_UNINIT) &&
667 !ext2fs_bg_flags_test(fs, i, EXT2_BG_INODE_UNINIT)) {
668 if (fix_problem(ctx, PR_0_BB_UNINIT_IB_INIT, &pctx)) {
669 ext2fs_bg_flags_clear(fs, i, EXT2_BG_BLOCK_UNINIT);
672 ext2fs_unmark_valid(fs);
676 (ext2fs_bg_itable_unused(fs, i) > ext2fs_bg_free_inodes_count(fs, i) ||
677 ext2fs_bg_itable_unused(fs, i) > sb->s_inodes_per_group)) {
678 pctx.blk = ext2fs_bg_itable_unused(fs, i);
679 if (fix_problem(ctx, PR_0_GDT_ITABLE_UNUSED, &pctx)) {
680 ext2fs_bg_itable_unused_set(fs, i, 0);
683 ext2fs_unmark_valid(fs);
687 ext2fs_group_desc_csum_set(fs, i);
688 /* If the user aborts e2fsck by typing ^C, stop right away */
689 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
693 ctx->free_blocks = free_blocks;
694 ctx->free_inodes = free_inodes;
696 if ((ext2fs_free_blocks_count(sb) > ext2fs_blocks_count(sb)) ||
697 (sb->s_free_inodes_count > sb->s_inodes_count))
698 ext2fs_unmark_valid(fs);
702 * If we have invalid bitmaps, set the error state of the
705 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
706 sb->s_state &= ~EXT2_VALID_FS;
707 ext2fs_mark_super_dirty(fs);
710 clear_problem_context(&pctx);
712 #ifndef EXT2_SKIP_UUID
714 * If the UUID field isn't assigned, assign it.
716 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
717 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
718 uuid_generate(sb->s_uuid);
719 ext2fs_mark_super_dirty(fs);
720 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
726 * Check to see if we should disable the test_fs flag
728 profile_get_boolean(ctx->profile, "options",
729 "clear_test_fs_flag", 0, 1,
730 &clear_test_fs_flag);
731 if (!(ctx->options & E2F_OPT_READONLY) &&
732 clear_test_fs_flag &&
733 (fs->super->s_flags & EXT2_FLAGS_TEST_FILESYS) &&
734 (fs_proc_check("ext4") || check_for_modules("ext4"))) {
735 if (fix_problem(ctx, PR_0_CLEAR_TESTFS_FLAG, &pctx)) {
736 fs->super->s_flags &= ~EXT2_FLAGS_TEST_FILESYS;
737 ext2fs_mark_super_dirty(fs);
738 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
743 * For the Hurd, check to see if the filetype option is set,
744 * since it doesn't support it.
746 if (!(ctx->options & E2F_OPT_READONLY) &&
747 fs->super->s_creator_os == EXT2_OS_HURD &&
748 (fs->super->s_feature_incompat &
749 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
750 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
751 fs->super->s_feature_incompat &=
752 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
753 ext2fs_mark_super_dirty(fs);
754 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
759 * If we have any of the compatibility flags set, we need to have a
760 * revision 1 filesystem. Most kernels will not check the flags on
761 * a rev 0 filesystem and we may have corruption issues because of
762 * the incompatible changes to the filesystem.
764 if (!(ctx->options & E2F_OPT_READONLY) &&
765 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
766 (fs->super->s_feature_compat ||
767 fs->super->s_feature_ro_compat ||
768 fs->super->s_feature_incompat) &&
769 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
770 ext2fs_update_dynamic_rev(fs);
771 ext2fs_mark_super_dirty(fs);
772 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
776 * Clean up any orphan inodes, if present.
778 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
779 fs->super->s_state &= ~EXT2_VALID_FS;
780 ext2fs_mark_super_dirty(fs);
784 * Unfortunately, due to Windows' unfortunate design decision
785 * to configure the hardware clock to tick localtime, instead
786 * of the more proper and less error-prone UTC time, many
787 * users end up in the situation where the system clock is
788 * incorrectly set at the time when e2fsck is run.
790 * Historically this was usually due to some distributions
791 * having buggy init scripts and/or installers that didn't
792 * correctly detect this case and take appropriate
793 * countermeasures. However, it's still possible, despite the
794 * best efforts of init script and installer authors to not be
795 * able to detect this misconfiguration, usually due to a
796 * buggy or misconfigured virtualization manager or the
797 * installer not having access to a network time server during
798 * the installation process. So by default, we allow the
799 * superblock times to be fudged by up to 24 hours. This can
800 * be disabled by setting options.accept_time_fudge to the
801 * boolean value of false in e2fsck.conf. We also support
802 * options.buggy_init_scripts for backwards compatibility.
804 profile_get_boolean(ctx->profile, "options", "accept_time_fudge",
805 0, 1, &accept_time_fudge);
806 profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
807 0, accept_time_fudge, &accept_time_fudge);
808 ctx->time_fudge = accept_time_fudge ? 86400 : 0;
810 profile_get_boolean(ctx->profile, "options", "broken_system_clock",
811 0, 0, &broken_system_clock);
814 * Check to see if the superblock last mount time or last
815 * write time is in the future.
817 if (!broken_system_clock &&
818 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
819 fs->super->s_mtime > (__u32) ctx->now) {
820 pctx.num = fs->super->s_mtime;
821 problem = PR_0_FUTURE_SB_LAST_MOUNT;
822 if (fs->super->s_mtime <= (__u32) ctx->now + ctx->time_fudge)
823 problem = PR_0_FUTURE_SB_LAST_MOUNT_FUDGED;
824 if (fix_problem(ctx, problem, &pctx)) {
825 fs->super->s_mtime = ctx->now;
826 ext2fs_mark_super_dirty(fs);
829 if (!broken_system_clock &&
830 !(ctx->flags & E2F_FLAG_TIME_INSANE) &&
831 fs->super->s_wtime > (__u32) ctx->now) {
832 pctx.num = fs->super->s_wtime;
833 problem = PR_0_FUTURE_SB_LAST_WRITE;
834 if (fs->super->s_wtime <= (__u32) ctx->now + ctx->time_fudge)
835 problem = PR_0_FUTURE_SB_LAST_WRITE_FUDGED;
836 if (fix_problem(ctx, problem, &pctx)) {
837 fs->super->s_wtime = ctx->now;
838 ext2fs_mark_super_dirty(fs);
843 * Move the ext3 journal file, if necessary.
845 e2fsck_move_ext3_journal(ctx);
848 * Fix journal hint, if necessary
850 e2fsck_fix_ext3_journal_hint(ctx);
853 * Add dirhash hint if necessary
855 e2fsck_fix_dirhash_hint(ctx);
861 * Check to see if we should backup the master sb to the backup super
862 * blocks. Returns non-zero if the sb should be backed up.
866 * A few flags are set on the fly by the kernel, but only in the
867 * primary superblock. This is actually a bad thing, and we should
868 * try to discourage it in the future. In particular, for the newer
869 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
870 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
871 * future. EXT3_FEATURE_INCOMPAT_RECOVER may also get set when
872 * copying the primary superblock during online resize.
874 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
875 * unfortunately, we shouldn't ignore it since if it's not set in the
876 * backup, the extended attributes in the filesystem will be stripped
879 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
880 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
881 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS| \
882 EXT3_FEATURE_INCOMPAT_RECOVER)
884 int check_backup_super_block(e2fsck_t ctx)
886 ext2_filsys fs = ctx->fs;
891 char buf[SUPERBLOCK_SIZE];
892 struct ext2_super_block *backup_sb;
895 * If we are already writing out the backup blocks, then we
896 * don't need to test. Also, if the filesystem is invalid, or
897 * the check was aborted or cancelled, we also don't want to
898 * do the backup. If the filesystem was opened read-only then
899 * we can't do the backup.
901 if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
902 !ext2fs_test_valid(fs) ||
903 (fs->super->s_state & EXT2_ERROR_FS) ||
904 (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
905 (ctx->options & E2F_OPT_READONLY))
908 for (g = 1; g < fs->group_desc_count; g++) {
909 if (!ext2fs_bg_has_super(fs, g))
912 sb = fs->super->s_first_data_block +
913 (g * fs->super->s_blocks_per_group);
915 retval = io_channel_read_blk(fs->io, sb, -SUPERBLOCK_SIZE,
919 backup_sb = (struct ext2_super_block *) buf;
920 #ifdef WORDS_BIGENDIAN
921 ext2fs_swap_super(backup_sb);
923 if ((backup_sb->s_magic != EXT2_SUPER_MAGIC) ||
924 (backup_sb->s_rev_level > EXT2_LIB_CURRENT_REV) ||
925 ((backup_sb->s_log_block_size + EXT2_MIN_BLOCK_LOG_SIZE) >
926 EXT2_MAX_BLOCK_LOG_SIZE) ||
927 (EXT2_INODE_SIZE(backup_sb) < EXT2_GOOD_OLD_INODE_SIZE))
930 #define SUPER_INCOMPAT_DIFFERENT(x) \
931 ((fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
932 (backup_sb->x & ~FEATURE_INCOMPAT_IGNORE))
933 #define SUPER_RO_COMPAT_DIFFERENT(x) \
934 ((fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
935 (backup_sb->x & ~FEATURE_RO_COMPAT_IGNORE))
936 #define SUPER_DIFFERENT(x) \
937 (fs->super->x != backup_sb->x)
939 if (SUPER_DIFFERENT(s_feature_compat) ||
940 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
941 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
942 SUPER_DIFFERENT(s_blocks_count) ||
943 SUPER_DIFFERENT(s_inodes_count) ||
944 memcmp(fs->super->s_uuid, backup_sb->s_uuid,
945 sizeof(fs->super->s_uuid)))