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 blk_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 blk_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 >= fs->super->s_blocks_count)) {
81 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_BLOCK_NUM, pctx);
87 if (!ext2fs_test_block_bitmap(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_blk(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_blk(fs->io, blk, 1,
132 memset(pb->buf + pb->truncate_offset, 0,
133 fs->blocksize - pb->truncate_offset);
134 pb->errcode = io_channel_write_blk(fs->io, blk, 1,
139 pb->truncated_blocks++;
141 retval |= BLOCK_CHANGED;
144 ext2fs_block_alloc_stats(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_iterate2(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 inode->i_blocks -= pb.truncated_blocks *
199 (fs->blocksize / 512);
201 if (inode->i_file_acl) {
202 retval = ext2fs_adjust_ea_refcount(fs, inode->i_file_acl,
203 block_buf, -1, &count);
204 if (retval == EXT2_ET_BAD_EA_BLOCK_NUM) {
209 com_err("release_inode_blocks", retval,
210 _("while calling ext2fs_adjust_ea_refcount for inode %d"),
215 ext2fs_block_alloc_stats(fs, inode->i_file_acl, -1);
216 inode->i_file_acl = 0;
222 * This function releases all of the orphan inodes. It returns 1 if
223 * it hit some error, and 0 on success.
225 static int release_orphan_inodes(e2fsck_t ctx)
227 ext2_filsys fs = ctx->fs;
228 ext2_ino_t ino, next_ino;
229 struct ext2_inode inode;
230 struct problem_context pctx;
233 if ((ino = fs->super->s_last_orphan) == 0)
237 * Win or lose, we won't be using the head of the orphan inode
240 fs->super->s_last_orphan = 0;
241 ext2fs_mark_super_dirty(fs);
244 * If the filesystem contains errors, don't run the orphan
245 * list, since the orphan list can't be trusted; and we're
246 * going to be running a full e2fsck run anyway...
248 if (fs->super->s_state & EXT2_ERROR_FS)
251 if ((ino < EXT2_FIRST_INODE(fs->super)) ||
252 (ino > fs->super->s_inodes_count)) {
253 clear_problem_context(&pctx);
255 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_HEAD_INODE, &pctx);
259 block_buf = (char *) e2fsck_allocate_memory(ctx, fs->blocksize * 4,
260 "block iterate buffer");
261 e2fsck_read_bitmaps(ctx);
264 e2fsck_read_inode(ctx, ino, &inode, "release_orphan_inodes");
265 clear_problem_context(&pctx);
268 pctx.str = inode.i_links_count ? _("Truncating") :
271 fix_problem(ctx, PR_0_ORPHAN_CLEAR_INODE, &pctx);
273 next_ino = inode.i_dtime;
275 ((next_ino < EXT2_FIRST_INODE(fs->super)) ||
276 (next_ino > fs->super->s_inodes_count))) {
278 fix_problem(ctx, PR_0_ORPHAN_ILLEGAL_INODE, &pctx);
282 if (release_inode_blocks(ctx, ino, &inode, block_buf, &pctx))
285 if (!inode.i_links_count) {
286 ext2fs_inode_alloc_stats2(fs, ino, -1,
287 LINUX_S_ISDIR(inode.i_mode));
288 inode.i_dtime = ctx->now;
292 e2fsck_write_inode(ctx, ino, &inode, "delete_file");
295 ext2fs_free_mem(&block_buf);
298 ext2fs_free_mem(&block_buf);
303 * Check the resize inode to make sure it is sane. We check both for
304 * the case where on-line resizing is not enabled (in which case the
305 * resize inode should be cleared) as well as the case where on-line
306 * resizing is enabled.
308 static void check_resize_inode(e2fsck_t ctx)
310 ext2_filsys fs = ctx->fs;
311 struct ext2_inode inode;
312 struct problem_context pctx;
313 int i, gdt_off, ind_off;
315 blk_t blk, pblk, expect;
316 __u32 *dind_buf = 0, *ind_buf;
319 clear_problem_context(&pctx);
322 * If the resize inode feature isn't set, then
323 * s_reserved_gdt_blocks must be zero.
325 if (!(fs->super->s_feature_compat &
326 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
327 if (fs->super->s_reserved_gdt_blocks) {
328 pctx.num = fs->super->s_reserved_gdt_blocks;
329 if (fix_problem(ctx, PR_0_NONZERO_RESERVED_GDT_BLOCKS,
331 fs->super->s_reserved_gdt_blocks = 0;
332 ext2fs_mark_super_dirty(fs);
337 /* Read the resize inode */
338 pctx.ino = EXT2_RESIZE_INO;
339 retval = ext2fs_read_inode(fs, EXT2_RESIZE_INO, &inode);
341 if (fs->super->s_feature_compat &
342 EXT2_FEATURE_COMPAT_RESIZE_INODE)
343 ctx->flags |= E2F_FLAG_RESIZE_INODE;
348 * If the resize inode feature isn't set, check to make sure
349 * the resize inode is cleared; then we're done.
351 if (!(fs->super->s_feature_compat &
352 EXT2_FEATURE_COMPAT_RESIZE_INODE)) {
353 for (i=0; i < EXT2_N_BLOCKS; i++) {
354 if (inode.i_block[i])
357 if ((i < EXT2_N_BLOCKS) &&
358 fix_problem(ctx, PR_0_CLEAR_RESIZE_INODE, &pctx)) {
359 memset(&inode, 0, sizeof(inode));
360 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
367 * The resize inode feature is enabled; check to make sure the
368 * only block in use is the double indirect block
370 blk = inode.i_block[EXT2_DIND_BLOCK];
371 for (i=0; i < EXT2_N_BLOCKS; i++) {
372 if (i != EXT2_DIND_BLOCK && inode.i_block[i])
375 if ((i < EXT2_N_BLOCKS) || !blk || !inode.i_links_count ||
376 !(inode.i_mode & LINUX_S_IFREG) ||
377 (blk < fs->super->s_first_data_block ||
378 blk >= fs->super->s_blocks_count)) {
379 resize_inode_invalid:
380 if (fix_problem(ctx, PR_0_RESIZE_INODE_INVALID, &pctx)) {
381 memset(&inode, 0, sizeof(inode));
382 e2fsck_write_inode(ctx, EXT2_RESIZE_INO, &inode,
384 ctx->flags |= E2F_FLAG_RESIZE_INODE;
386 if (!(ctx->options & E2F_OPT_READONLY)) {
387 fs->super->s_state &= ~EXT2_VALID_FS;
388 ext2fs_mark_super_dirty(fs);
392 dind_buf = (__u32 *) e2fsck_allocate_memory(ctx, fs->blocksize * 2,
393 "resize dind buffer");
394 ind_buf = (__u32 *) ((char *) dind_buf + fs->blocksize);
396 retval = ext2fs_read_ind_block(fs, blk, dind_buf);
398 goto resize_inode_invalid;
400 gdt_off = fs->desc_blocks;
401 pblk = fs->super->s_first_data_block + 1 + fs->desc_blocks;
402 for (i = 0; i < fs->super->s_reserved_gdt_blocks / 4;
403 i++, gdt_off++, pblk++) {
404 gdt_off %= fs->blocksize/4;
405 if (dind_buf[gdt_off] != pblk)
406 goto resize_inode_invalid;
407 retval = ext2fs_read_ind_block(fs, pblk, ind_buf);
409 goto resize_inode_invalid;
411 for (j = 1; j < fs->group_desc_count; j++) {
412 if (!ext2fs_bg_has_super(fs, j))
414 expect = pblk + (j * fs->super->s_blocks_per_group);
415 if (ind_buf[ind_off] != expect)
416 goto resize_inode_invalid;
423 ext2fs_free_mem(&dind_buf);
428 * This function checks the dirhash signed/unsigned hint if necessary.
430 static void e2fsck_fix_dirhash_hint(e2fsck_t ctx)
432 struct ext2_super_block *sb = ctx->fs->super;
433 struct problem_context pctx;
436 if ((ctx->options & E2F_OPT_READONLY) ||
437 !(sb->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX) ||
438 (sb->s_flags & (EXT2_FLAGS_SIGNED_HASH|EXT2_FLAGS_UNSIGNED_HASH)))
443 clear_problem_context(&pctx);
444 if (fix_problem(ctx, PR_0_DIRHASH_HINT, &pctx)) {
445 if (((int) c) == -1) {
446 sb->s_flags |= EXT2_FLAGS_SIGNED_HASH;
448 sb->s_flags |= EXT2_FLAGS_UNSIGNED_HASH;
450 ext2fs_mark_super_dirty(ctx->fs);
455 void check_super_block(e2fsck_t ctx)
457 ext2_filsys fs = ctx->fs;
458 blk_t first_block, last_block;
459 struct ext2_super_block *sb = fs->super;
460 struct ext2_group_desc *gd;
461 blk_t blocks_per_group = fs->super->s_blocks_per_group;
463 int inodes_per_block;
466 int buggy_init_scripts;
469 struct problem_context pctx;
470 __u32 free_blocks = 0, free_inodes = 0;
472 inodes_per_block = EXT2_INODES_PER_BLOCK(fs->super);
473 ipg_max = inodes_per_block * (blocks_per_group - 4);
474 if (ipg_max > EXT2_MAX_INODES_PER_GROUP(sb))
475 ipg_max = EXT2_MAX_INODES_PER_GROUP(sb);
476 bpg_max = 8 * EXT2_BLOCK_SIZE(sb);
477 if (bpg_max > EXT2_MAX_BLOCKS_PER_GROUP(sb))
478 bpg_max = EXT2_MAX_BLOCKS_PER_GROUP(sb);
480 ctx->invalid_inode_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
481 sizeof(int) * fs->group_desc_count, "invalid_inode_bitmap");
482 ctx->invalid_block_bitmap_flag = (int *) e2fsck_allocate_memory(ctx,
483 sizeof(int) * fs->group_desc_count, "invalid_block_bitmap");
484 ctx->invalid_inode_table_flag = (int *) e2fsck_allocate_memory(ctx,
485 sizeof(int) * fs->group_desc_count, "invalid_inode_table");
487 clear_problem_context(&pctx);
490 * Verify the super block constants...
492 check_super_value(ctx, "inodes_count", sb->s_inodes_count,
494 check_super_value(ctx, "blocks_count", sb->s_blocks_count,
496 check_super_value(ctx, "first_data_block", sb->s_first_data_block,
497 MAX_CHECK, 0, sb->s_blocks_count);
498 check_super_value(ctx, "log_block_size", sb->s_log_block_size,
499 MIN_CHECK | MAX_CHECK, 0,
500 EXT2_MAX_BLOCK_LOG_SIZE - EXT2_MIN_BLOCK_LOG_SIZE);
501 check_super_value(ctx, "log_frag_size", sb->s_log_frag_size,
502 MIN_CHECK | MAX_CHECK, 0, sb->s_log_block_size);
503 check_super_value(ctx, "frags_per_group", sb->s_frags_per_group,
504 MIN_CHECK | MAX_CHECK, sb->s_blocks_per_group,
506 check_super_value(ctx, "blocks_per_group", sb->s_blocks_per_group,
507 MIN_CHECK | MAX_CHECK, 8, bpg_max);
508 check_super_value(ctx, "inodes_per_group", sb->s_inodes_per_group,
509 MIN_CHECK | MAX_CHECK, inodes_per_block, ipg_max);
510 check_super_value(ctx, "r_blocks_count", sb->s_r_blocks_count,
511 MAX_CHECK, 0, sb->s_blocks_count / 2);
512 check_super_value(ctx, "reserved_gdt_blocks",
513 sb->s_reserved_gdt_blocks, MAX_CHECK, 0,
515 inode_size = EXT2_INODE_SIZE(sb);
516 check_super_value(ctx, "inode_size",
517 inode_size, MIN_CHECK | MAX_CHECK,
518 EXT2_GOOD_OLD_INODE_SIZE, fs->blocksize);
519 if (inode_size & (inode_size - 1)) {
520 pctx.num = inode_size;
521 pctx.str = "inode_size";
522 fix_problem(ctx, PR_0_MISC_CORRUPT_SUPER, &pctx);
523 ctx->flags |= E2F_FLAG_ABORT; /* never get here! */
527 if ((ctx->flags & E2F_FLAG_GOT_DEVSIZE) &&
528 (ctx->num_blocks < sb->s_blocks_count)) {
529 pctx.blk = sb->s_blocks_count;
530 pctx.blk2 = ctx->num_blocks;
531 if (fix_problem(ctx, PR_0_FS_SIZE_WRONG, &pctx)) {
532 ctx->flags |= E2F_FLAG_ABORT;
537 if (sb->s_log_block_size != (__u32) sb->s_log_frag_size) {
538 pctx.blk = EXT2_BLOCK_SIZE(sb);
539 pctx.blk2 = EXT2_FRAG_SIZE(sb);
540 fix_problem(ctx, PR_0_NO_FRAGMENTS, &pctx);
541 ctx->flags |= E2F_FLAG_ABORT;
545 should_be = sb->s_frags_per_group >>
546 (sb->s_log_block_size - sb->s_log_frag_size);
547 if (sb->s_blocks_per_group != should_be) {
548 pctx.blk = sb->s_blocks_per_group;
549 pctx.blk2 = should_be;
550 fix_problem(ctx, PR_0_BLOCKS_PER_GROUP, &pctx);
551 ctx->flags |= E2F_FLAG_ABORT;
555 should_be = (sb->s_log_block_size == 0) ? 1 : 0;
556 if (sb->s_first_data_block != should_be) {
557 pctx.blk = sb->s_first_data_block;
558 pctx.blk2 = should_be;
559 fix_problem(ctx, PR_0_FIRST_DATA_BLOCK, &pctx);
560 ctx->flags |= E2F_FLAG_ABORT;
564 should_be = sb->s_inodes_per_group * fs->group_desc_count;
565 if (sb->s_inodes_count != should_be) {
566 pctx.ino = sb->s_inodes_count;
567 pctx.ino2 = should_be;
568 if (fix_problem(ctx, PR_0_INODE_COUNT_WRONG, &pctx)) {
569 sb->s_inodes_count = should_be;
570 ext2fs_mark_super_dirty(fs);
575 * Verify the group descriptors....
577 first_block = sb->s_first_data_block;
579 for (i = 0, gd=fs->group_desc; i < fs->group_desc_count; i++, gd++) {
582 first_block = ext2fs_group_first_block(fs, i);
583 last_block = ext2fs_group_last_block(fs, i);
585 if ((gd->bg_block_bitmap < first_block) ||
586 (gd->bg_block_bitmap > last_block)) {
587 pctx.blk = gd->bg_block_bitmap;
588 if (fix_problem(ctx, PR_0_BB_NOT_GROUP, &pctx))
589 gd->bg_block_bitmap = 0;
591 if (gd->bg_block_bitmap == 0) {
592 ctx->invalid_block_bitmap_flag[i]++;
593 ctx->invalid_bitmaps++;
595 if ((gd->bg_inode_bitmap < first_block) ||
596 (gd->bg_inode_bitmap > last_block)) {
597 pctx.blk = gd->bg_inode_bitmap;
598 if (fix_problem(ctx, PR_0_IB_NOT_GROUP, &pctx))
599 gd->bg_inode_bitmap = 0;
601 if (gd->bg_inode_bitmap == 0) {
602 ctx->invalid_inode_bitmap_flag[i]++;
603 ctx->invalid_bitmaps++;
605 if ((gd->bg_inode_table < first_block) ||
606 ((gd->bg_inode_table +
607 fs->inode_blocks_per_group - 1) > last_block)) {
608 pctx.blk = gd->bg_inode_table;
609 if (fix_problem(ctx, PR_0_ITABLE_NOT_GROUP, &pctx))
610 gd->bg_inode_table = 0;
612 if (gd->bg_inode_table == 0) {
613 ctx->invalid_inode_table_flag[i]++;
614 ctx->invalid_bitmaps++;
616 free_blocks += gd->bg_free_blocks_count;
617 free_inodes += gd->bg_free_inodes_count;
619 if ((gd->bg_free_blocks_count > sb->s_blocks_per_group) ||
620 (gd->bg_free_inodes_count > sb->s_inodes_per_group) ||
621 (gd->bg_used_dirs_count > sb->s_inodes_per_group))
622 ext2fs_unmark_valid(fs);
627 * Update the global counts from the block group counts. This
628 * is needed for an experimental patch which eliminates
629 * locking the entire filesystem when allocating blocks or
630 * inodes; if the filesystem is not unmounted cleanly, the
631 * global counts may not be accurate.
633 if ((free_blocks != sb->s_free_blocks_count) ||
634 (free_inodes != sb->s_free_inodes_count)) {
635 if (ctx->options & E2F_OPT_READONLY)
636 ext2fs_unmark_valid(fs);
638 sb->s_free_blocks_count = free_blocks;
639 sb->s_free_inodes_count = free_inodes;
640 ext2fs_mark_super_dirty(fs);
644 if ((sb->s_free_blocks_count > sb->s_blocks_count) ||
645 (sb->s_free_inodes_count > sb->s_inodes_count))
646 ext2fs_unmark_valid(fs);
650 * If we have invalid bitmaps, set the error state of the
653 if (ctx->invalid_bitmaps && !(ctx->options & E2F_OPT_READONLY)) {
654 sb->s_state &= ~EXT2_VALID_FS;
655 ext2fs_mark_super_dirty(fs);
658 clear_problem_context(&pctx);
660 #ifndef EXT2_SKIP_UUID
662 * If the UUID field isn't assigned, assign it.
664 if (!(ctx->options & E2F_OPT_READONLY) && uuid_is_null(sb->s_uuid)) {
665 if (fix_problem(ctx, PR_0_ADD_UUID, &pctx)) {
666 uuid_generate(sb->s_uuid);
667 ext2fs_mark_super_dirty(fs);
668 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
674 * For the Hurd, check to see if the filetype option is set,
675 * since it doesn't support it.
677 if (!(ctx->options & E2F_OPT_READONLY) &&
678 fs->super->s_creator_os == EXT2_OS_HURD &&
679 (fs->super->s_feature_incompat &
680 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
681 if (fix_problem(ctx, PR_0_HURD_CLEAR_FILETYPE, &pctx)) {
682 fs->super->s_feature_incompat &=
683 ~EXT2_FEATURE_INCOMPAT_FILETYPE;
684 ext2fs_mark_super_dirty(fs);
685 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
690 * If we have any of the compatibility flags set, we need to have a
691 * revision 1 filesystem. Most kernels will not check the flags on
692 * a rev 0 filesystem and we may have corruption issues because of
693 * the incompatible changes to the filesystem.
695 if (!(ctx->options & E2F_OPT_READONLY) &&
696 fs->super->s_rev_level == EXT2_GOOD_OLD_REV &&
697 (fs->super->s_feature_compat ||
698 fs->super->s_feature_ro_compat ||
699 fs->super->s_feature_incompat) &&
700 fix_problem(ctx, PR_0_FS_REV_LEVEL, &pctx)) {
701 ext2fs_update_dynamic_rev(fs);
702 ext2fs_mark_super_dirty(fs);
703 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
706 check_resize_inode(ctx);
709 * Clean up any orphan inodes, if present.
711 if (!(ctx->options & E2F_OPT_READONLY) && release_orphan_inodes(ctx)) {
712 fs->super->s_state &= ~EXT2_VALID_FS;
713 ext2fs_mark_super_dirty(fs);
717 * Some buggy distributions (such as Ubuntu) have init scripts
718 * and/or installers which fail to correctly set the system
719 * clock before running e2fsck and/or formatting the
720 * filesystem initially. Normally this happens because the
721 * hardware clock is ticking localtime, instead of the more
722 * proper and less error-prone UTC time. So while the kernel
723 * is booting, the system time (which in Linux systems always
724 * ticks in UTC time) is set from the hardware clock, but
725 * since the hardware clock is ticking localtime, the system
726 * time is incorrect. Unfortunately, some buggy distributions
727 * do not correct this before running e2fsck. If this option
728 * is set to a boolean value of true, we attempt to work
729 * around this situation by allowing the superblock last write
730 * time, last mount time, and last check time to be in the
731 * future by up to 24 hours.
733 profile_get_boolean(ctx->profile, "options", "buggy_init_scripts",
734 0, 0, &buggy_init_scripts);
735 ctx->time_fudge = buggy_init_scripts ? 86400 : 0;
738 * Check to see if the superblock last mount time or last
739 * write time is in the future.
741 if (fs->super->s_mtime > (__u32) ctx->now + ctx->time_fudge) {
742 pctx.num = fs->super->s_mtime;
743 if (fix_problem(ctx, PR_0_FUTURE_SB_LAST_MOUNT, &pctx)) {
744 fs->super->s_mtime = ctx->now;
745 ext2fs_mark_super_dirty(fs);
748 if (fs->super->s_wtime > (__u32) ctx->now + ctx->time_fudge) {
749 pctx.num = fs->super->s_wtime;
750 if (fix_problem(ctx, PR_0_FUTURE_SB_LAST_WRITE, &pctx)) {
751 fs->super->s_wtime = ctx->now;
752 ext2fs_mark_super_dirty(fs);
757 * Move the ext3 journal file, if necessary.
759 e2fsck_move_ext3_journal(ctx);
762 * Fix journal hint, if necessary
764 e2fsck_fix_ext3_journal_hint(ctx);
767 * Add dirhash hint if necessary
769 e2fsck_fix_dirhash_hint(ctx);
775 * Check to see if we should backup the master sb to the backup super
776 * blocks. Returns non-zero if the sb should be backed up.
780 * A few flags are set on the fly by the kernel, but only in the
781 * primary superblock. This is actually a bad thing, and we should
782 * try to discourage it in the future. In particular, for the newer
783 * ext4 files, especially EXT4_FEATURE_RO_COMPAT_DIR_NLINK and
784 * EXT3_FEATURE_INCOMPAT_EXTENTS. So some of these may go away in the
787 * The kernel will set EXT2_FEATURE_COMPAT_EXT_ATTR, but
788 * unfortunately, we shouldn't ignore it since if it's not set in the
789 * backup, the extended attributes in the filesystem will be stripped
792 #define FEATURE_RO_COMPAT_IGNORE (EXT2_FEATURE_RO_COMPAT_LARGE_FILE| \
793 EXT4_FEATURE_RO_COMPAT_DIR_NLINK)
794 #define FEATURE_INCOMPAT_IGNORE (EXT3_FEATURE_INCOMPAT_EXTENTS)
796 int check_backup_super_block(e2fsck_t ctx)
798 ext2_filsys fs = ctx->fs;
807 * If we are already writing out the backup blocks, then we
808 * don't need to test. Also, if the filesystem is invalid, or
809 * the check was aborted or cancelled, we also don't want to
810 * do the backup. If the filesystem was opened read-only then
811 * we can't do the backup.
813 if (((fs->flags & EXT2_FLAG_MASTER_SB_ONLY) == 0) ||
814 !ext2fs_test_valid(fs) ||
815 (fs->super->s_state & EXT2_ERROR_FS) ||
816 (ctx->flags & (E2F_FLAG_ABORT | E2F_FLAG_CANCEL)) ||
817 (ctx->options & E2F_OPT_READONLY))
820 for (g = 1; g < fs->group_desc_count; g++) {
821 if (!ext2fs_bg_has_super(fs, g))
824 sb = fs->super->s_first_data_block +
825 (g * fs->super->s_blocks_per_group);
827 retval = ext2fs_open(ctx->filesystem_name, 0,
829 fs->io->manager, &tfs);
835 #define SUPER_INCOMPAT_DIFFERENT(x) \
836 (( fs->super->x & ~FEATURE_INCOMPAT_IGNORE) != \
837 (tfs->super->x & ~FEATURE_INCOMPAT_IGNORE))
838 #define SUPER_RO_COMPAT_DIFFERENT(x) \
839 (( fs->super->x & ~FEATURE_RO_COMPAT_IGNORE) != \
840 (tfs->super->x & ~FEATURE_RO_COMPAT_IGNORE))
841 #define SUPER_DIFFERENT(x) \
842 (fs->super->x != tfs->super->x)
844 if (SUPER_DIFFERENT(s_feature_compat) ||
845 SUPER_INCOMPAT_DIFFERENT(s_feature_incompat) ||
846 SUPER_RO_COMPAT_DIFFERENT(s_feature_ro_compat) ||
847 SUPER_DIFFERENT(s_blocks_count) ||
848 SUPER_DIFFERENT(s_inodes_count) ||
849 memcmp(fs->super->s_uuid, tfs->super->s_uuid,
850 sizeof(fs->super->s_uuid)))