2 * pass2.c --- check directory structure
4 * Copyright (C) 1993, 1994, 1995, 1996, 1997 Theodore Ts'o
7 * This file may be redistributed under the terms of the GNU Public
11 * Pass 2 of e2fsck iterates through all active directory inodes, and
12 * applies to following tests to each directory entry in the directory
13 * blocks in the inodes:
15 * - The length of the directory entry (rec_len) should be at
16 * least 8 bytes, and no more than the remaining space
17 * left in the directory block.
18 * - The length of the name in the directory entry (name_len)
19 * should be less than (rec_len - 8).
20 * - The inode number in the directory entry should be within
22 * - The inode number should refer to a in-use inode.
23 * - The first entry should be '.', and its inode should be
24 * the inode of the directory.
25 * - The second entry should be '..'.
27 * To minimize disk seek time, the directory blocks are processed in
28 * sorted order of block numbers.
30 * Pass 2 also collects the following information:
31 * - The inode numbers of the subdirectories for each directory.
33 * Pass 2 relies on the following information from previous passes:
34 * - The directory information collected in pass 1.
35 * - The inode_used_map bitmap
36 * - The inode_bad_map bitmap
37 * - The inode_dir_map bitmap
39 * Pass 2 frees the following data structures
40 * - The inode_bad_map bitmap
41 * - The inode_reg_map bitmap
44 #define _GNU_SOURCE 1 /* get strnlen() */
51 #ifdef NO_INLINE_FUNCS
54 #define _INLINE_ inline
57 /* #define DX_DEBUG */
60 * Keeps track of how many times an inode is referenced.
62 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf);
63 static int check_dir_block(ext2_filsys fs,
64 struct ext2_db_entry *dir_blocks_info,
66 static int allocate_dir_block(e2fsck_t ctx,
67 struct ext2_db_entry *dir_blocks_info,
68 char *buf, struct problem_context *pctx);
69 static int update_dir_block(ext2_filsys fs,
75 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino);
76 static int htree_depth(struct dx_dir_info *dx_dir,
77 struct dx_dirblock_info *dx_db);
78 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b);
80 struct check_dir_struct {
82 struct problem_context pctx;
87 void e2fsck_pass2(e2fsck_t ctx)
89 struct ext2_super_block *sb = ctx->fs->super;
90 struct problem_context pctx;
91 ext2_filsys fs = ctx->fs;
94 struct resource_track rtrack;
96 struct check_dir_struct cd;
97 struct dx_dir_info *dx_dir;
98 struct dx_dirblock_info *dx_db, *dx_parent;
104 #ifdef RESOURCE_TRACK
105 init_resource_track(&rtrack, ctx->fs->io);
108 clear_problem_context(&cd.pctx);
111 mtrace_print("Pass 2");
114 if (!(ctx->options & E2F_OPT_PREEN))
115 fix_problem(ctx, PR_2_PASS_HEADER, &cd.pctx);
117 e2fsck_setup_tdb_icount(ctx, EXT2_ICOUNT_OPT_INCREMENT,
119 if (ctx->inode_count)
122 cd.pctx.errcode = ext2fs_create_icount2(fs,
123 EXT2_ICOUNT_OPT_INCREMENT,
124 0, ctx->inode_link_info,
126 if (cd.pctx.errcode) {
127 fix_problem(ctx, PR_2_ALLOCATE_ICOUNT, &cd.pctx);
128 ctx->flags |= E2F_FLAG_ABORT;
131 buf = (char *) e2fsck_allocate_memory(ctx, 2*fs->blocksize,
132 "directory scan buffer");
135 * Set up the parent pointer for the root directory, if
136 * present. (If the root directory is not present, we will
137 * create it in pass 3.)
139 (void) e2fsck_dir_info_set_parent(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO);
144 cd.max = ext2fs_dblist_count(fs->dblist);
147 (void) (ctx->progress)(ctx, 2, 0, cd.max);
149 if (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_DIR_INDEX)
150 ext2fs_dblist_sort(fs->dblist, special_dir_block_cmp);
152 cd.pctx.errcode = ext2fs_dblist_iterate(fs->dblist, check_dir_block,
154 if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART)
156 if (cd.pctx.errcode) {
157 fix_problem(ctx, PR_2_DBLIST_ITERATE, &cd.pctx);
158 ctx->flags |= E2F_FLAG_ABORT;
163 for (i=0; (dx_dir = e2fsck_dx_dir_info_iter(ctx, &i)) != 0;) {
164 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
166 if (dx_dir->numblocks == 0)
168 clear_problem_context(&pctx);
170 pctx.dir = dx_dir->ino;
171 dx_db = dx_dir->dx_block;
172 if (dx_db->flags & DX_FLAG_REFERENCED)
173 dx_db->flags |= DX_FLAG_DUP_REF;
175 dx_db->flags |= DX_FLAG_REFERENCED;
177 * Find all of the first and last leaf blocks, and
178 * update their parent's min and max hash values
180 for (b=0, dx_db = dx_dir->dx_block;
181 b < dx_dir->numblocks;
183 if ((dx_db->type != DX_DIRBLOCK_LEAF) ||
184 !(dx_db->flags & (DX_FLAG_FIRST | DX_FLAG_LAST)))
186 dx_parent = &dx_dir->dx_block[dx_db->parent];
188 * XXX Make sure dx_parent->min_hash > dx_db->min_hash
190 if (dx_db->flags & DX_FLAG_FIRST)
191 dx_parent->min_hash = dx_db->min_hash;
193 * XXX Make sure dx_parent->max_hash < dx_db->max_hash
195 if (dx_db->flags & DX_FLAG_LAST)
196 dx_parent->max_hash = dx_db->max_hash;
199 for (b=0, dx_db = dx_dir->dx_block;
200 b < dx_dir->numblocks;
203 pctx.group = dx_db->parent;
205 if (!(dx_db->flags & DX_FLAG_FIRST) &&
206 (dx_db->min_hash < dx_db->node_min_hash)) {
207 pctx.blk = dx_db->min_hash;
208 pctx.blk2 = dx_db->node_min_hash;
209 code = PR_2_HTREE_MIN_HASH;
210 fix_problem(ctx, code, &pctx);
213 if (dx_db->type == DX_DIRBLOCK_LEAF) {
214 depth = htree_depth(dx_dir, dx_db);
215 if (depth != dx_dir->depth) {
216 pctx.num = dx_dir->depth;
217 code = PR_2_HTREE_BAD_DEPTH;
218 fix_problem(ctx, code, &pctx);
223 * This test doesn't apply for the root block
227 (dx_db->max_hash > dx_db->node_max_hash)) {
228 pctx.blk = dx_db->max_hash;
229 pctx.blk2 = dx_db->node_max_hash;
230 code = PR_2_HTREE_MAX_HASH;
231 fix_problem(ctx, code, &pctx);
234 if (!(dx_db->flags & DX_FLAG_REFERENCED)) {
235 code = PR_2_HTREE_NOTREF;
236 fix_problem(ctx, code, &pctx);
238 } else if (dx_db->flags & DX_FLAG_DUP_REF) {
239 code = PR_2_HTREE_DUPREF;
240 fix_problem(ctx, code, &pctx);
246 if (bad_dir && fix_problem(ctx, PR_2_HTREE_CLEAR, &pctx)) {
247 clear_htree(ctx, dx_dir->ino);
248 dx_dir->numblocks = 0;
252 ext2fs_free_mem(&buf);
253 ext2fs_free_dblist(fs->dblist);
255 if (ctx->inode_bad_map) {
256 ext2fs_free_inode_bitmap(ctx->inode_bad_map);
257 ctx->inode_bad_map = 0;
259 if (ctx->inode_reg_map) {
260 ext2fs_free_inode_bitmap(ctx->inode_reg_map);
261 ctx->inode_reg_map = 0;
264 clear_problem_context(&pctx);
265 if (ctx->large_files) {
266 if (!(sb->s_feature_ro_compat &
267 EXT2_FEATURE_RO_COMPAT_LARGE_FILE) &&
268 fix_problem(ctx, PR_2_FEATURE_LARGE_FILES, &pctx)) {
269 sb->s_feature_ro_compat |=
270 EXT2_FEATURE_RO_COMPAT_LARGE_FILE;
271 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
272 ext2fs_mark_super_dirty(fs);
274 if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
275 fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
276 ext2fs_update_dynamic_rev(fs);
277 ext2fs_mark_super_dirty(fs);
281 #ifdef RESOURCE_TRACK
282 if (ctx->options & E2F_OPT_TIME2) {
283 e2fsck_clear_progbar(ctx);
284 print_resource_track(_("Pass 2"), &rtrack, fs->io);
289 #define MAX_DEPTH 32000
290 static int htree_depth(struct dx_dir_info *dx_dir,
291 struct dx_dirblock_info *dx_db)
295 while (dx_db->type != DX_DIRBLOCK_ROOT && depth < MAX_DEPTH) {
296 dx_db = &dx_dir->dx_block[dx_db->parent];
302 static int dict_de_cmp(const void *a, const void *b)
304 const struct ext2_dir_entry *de_a, *de_b;
307 de_a = (const struct ext2_dir_entry *) a;
308 a_len = de_a->name_len & 0xFF;
309 de_b = (const struct ext2_dir_entry *) b;
310 b_len = de_b->name_len & 0xFF;
313 return (a_len - b_len);
315 return strncmp(de_a->name, de_b->name, a_len);
319 * This is special sort function that makes sure that directory blocks
320 * with a dirblock of zero are sorted to the beginning of the list.
321 * This guarantees that the root node of the htree directories are
322 * processed first, so we know what hash version to use.
324 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b)
326 const struct ext2_db_entry *db_a =
327 (const struct ext2_db_entry *) a;
328 const struct ext2_db_entry *db_b =
329 (const struct ext2_db_entry *) b;
331 if (db_a->blockcnt && !db_b->blockcnt)
334 if (!db_a->blockcnt && db_b->blockcnt)
337 if (db_a->blk != db_b->blk)
338 return (int) (db_a->blk - db_b->blk);
340 if (db_a->ino != db_b->ino)
341 return (int) (db_a->ino - db_b->ino);
343 return (int) (db_a->blockcnt - db_b->blockcnt);
348 * Make sure the first entry in the directory is '.', and that the
349 * directory entry is sane.
351 static int check_dot(e2fsck_t ctx,
352 struct ext2_dir_entry *dirent,
353 ext2_ino_t ino, struct problem_context *pctx)
355 struct ext2_dir_entry *nextdir;
358 int rec_len, new_len;
362 problem = PR_2_MISSING_DOT;
363 else if (((dirent->name_len & 0xFF) != 1) ||
364 (dirent->name[0] != '.'))
365 problem = PR_2_1ST_NOT_DOT;
366 else if (dirent->name[1] != '\0')
367 problem = PR_2_DOT_NULL_TERM;
369 rec_len = (dirent->rec_len || ctx->fs->blocksize < 65536) ?
370 dirent->rec_len : 65536;
372 if (fix_problem(ctx, problem, pctx)) {
374 rec_len = dirent->rec_len = 12;
376 dirent->name_len = 1;
377 dirent->name[0] = '.';
378 dirent->name[1] = '\0';
383 if (dirent->inode != ino) {
384 if (fix_problem(ctx, PR_2_BAD_INODE_DOT, pctx)) {
390 new_len = rec_len - 12;
393 fix_problem(ctx, PR_2_SPLIT_DOT, pctx)) {
394 nextdir = (struct ext2_dir_entry *)
395 ((char *) dirent + 12);
396 dirent->rec_len = 12;
397 nextdir->rec_len = new_len;
399 nextdir->name_len = 0;
408 * Make sure the second entry in the directory is '..', and that the
409 * directory entry is sane. We do not check the inode number of '..'
410 * here; this gets done in pass 3.
412 static int check_dotdot(e2fsck_t ctx,
413 struct ext2_dir_entry *dirent,
414 ext2_ino_t ino, struct problem_context *pctx)
416 int rec_len, problem = 0;
419 problem = PR_2_MISSING_DOT_DOT;
420 else if (((dirent->name_len & 0xFF) != 2) ||
421 (dirent->name[0] != '.') ||
422 (dirent->name[1] != '.'))
423 problem = PR_2_2ND_NOT_DOT_DOT;
424 else if (dirent->name[2] != '\0')
425 problem = PR_2_DOT_DOT_NULL_TERM;
427 rec_len = (dirent->rec_len || ctx->fs->blocksize < 65536) ?
428 dirent->rec_len : 65536;
430 if (fix_problem(ctx, problem, pctx)) {
432 dirent->rec_len = 12;
434 * Note: we don't have the parent inode just
435 * yet, so we will fill it in with the root
436 * inode. This will get fixed in pass 3.
438 dirent->inode = EXT2_ROOT_INO;
439 dirent->name_len = 2;
440 dirent->name[0] = '.';
441 dirent->name[1] = '.';
442 dirent->name[2] = '\0';
447 if (e2fsck_dir_info_set_dotdot(ctx, ino, dirent->inode)) {
448 fix_problem(ctx, PR_2_NO_DIRINFO, pctx);
455 * Check to make sure a directory entry doesn't contain any illegal
458 static int check_name(e2fsck_t ctx,
459 struct ext2_dir_entry *dirent,
460 ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
461 struct problem_context *pctx)
467 for ( i = 0; i < (dirent->name_len & 0xFF); i++) {
468 if (dirent->name[i] == '/' || dirent->name[i] == '\0') {
470 fixup = fix_problem(ctx, PR_2_BAD_NAME, pctx);
473 dirent->name[i] = '.';
482 * Check the directory filetype (if present)
484 static _INLINE_ int check_filetype(e2fsck_t ctx,
485 struct ext2_dir_entry *dirent,
486 ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
487 struct problem_context *pctx)
489 int filetype = dirent->name_len >> 8;
490 int should_be = EXT2_FT_UNKNOWN;
491 struct ext2_inode inode;
493 if (!(ctx->fs->super->s_feature_incompat &
494 EXT2_FEATURE_INCOMPAT_FILETYPE)) {
496 !fix_problem(ctx, PR_2_CLEAR_FILETYPE, pctx))
498 dirent->name_len = dirent->name_len & 0xFF;
502 if (ext2fs_test_inode_bitmap(ctx->inode_dir_map, dirent->inode)) {
503 should_be = EXT2_FT_DIR;
504 } else if (ext2fs_test_inode_bitmap(ctx->inode_reg_map,
506 should_be = EXT2_FT_REG_FILE;
507 } else if (ctx->inode_bad_map &&
508 ext2fs_test_inode_bitmap(ctx->inode_bad_map,
512 e2fsck_read_inode(ctx, dirent->inode, &inode,
514 should_be = ext2_file_type(inode.i_mode);
516 if (filetype == should_be)
518 pctx->num = should_be;
520 if (fix_problem(ctx, filetype ? PR_2_BAD_FILETYPE : PR_2_SET_FILETYPE,
524 dirent->name_len = (dirent->name_len & 0xFF) | should_be << 8;
529 static void parse_int_node(ext2_filsys fs,
530 struct ext2_db_entry *db,
531 struct check_dir_struct *cd,
532 struct dx_dir_info *dx_dir,
535 struct ext2_dx_root_info *root;
536 struct ext2_dx_entry *ent;
537 struct ext2_dx_countlimit *limit;
538 struct dx_dirblock_info *dx_db;
539 int i, expect_limit, count;
541 ext2_dirhash_t min_hash = 0xffffffff;
542 ext2_dirhash_t max_hash = 0;
543 ext2_dirhash_t hash = 0, prev_hash;
545 if (db->blockcnt == 0) {
546 root = (struct ext2_dx_root_info *) (block_buf + 24);
549 printf("Root node dump:\n");
550 printf("\t Reserved zero: %u\n", root->reserved_zero);
551 printf("\t Hash Version: %d\n", root->hash_version);
552 printf("\t Info length: %d\n", root->info_length);
553 printf("\t Indirect levels: %d\n", root->indirect_levels);
554 printf("\t Flags: %d\n", root->unused_flags);
557 ent = (struct ext2_dx_entry *) (block_buf + 24 + root->info_length);
559 ent = (struct ext2_dx_entry *) (block_buf+8);
561 limit = (struct ext2_dx_countlimit *) ent;
564 printf("Number of entries (count): %d\n",
565 ext2fs_le16_to_cpu(limit->count));
566 printf("Number of entries (limit): %d\n",
567 ext2fs_le16_to_cpu(limit->limit));
570 count = ext2fs_le16_to_cpu(limit->count);
571 expect_limit = (fs->blocksize - ((char *) ent - block_buf)) /
572 sizeof(struct ext2_dx_entry);
573 if (ext2fs_le16_to_cpu(limit->limit) != expect_limit) {
574 cd->pctx.num = ext2fs_le16_to_cpu(limit->limit);
575 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_LIMIT, &cd->pctx))
578 if (count > expect_limit) {
579 cd->pctx.num = count;
580 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_COUNT, &cd->pctx))
582 count = expect_limit;
585 for (i=0; i < count; i++) {
587 hash = i ? (ext2fs_le32_to_cpu(ent[i].hash) & ~1) : 0;
589 printf("Entry #%d: Hash 0x%08x, block %u\n", i,
590 hash, ext2fs_le32_to_cpu(ent[i].block));
592 blk = ext2fs_le32_to_cpu(ent[i].block) & 0x0ffffff;
593 /* Check to make sure the block is valid */
594 if (blk >= (blk_t) dx_dir->numblocks) {
596 if (fix_problem(cd->ctx, PR_2_HTREE_BADBLK,
601 if (hash < prev_hash &&
602 fix_problem(cd->ctx, PR_2_HTREE_HASH_ORDER, &cd->pctx))
604 dx_db = &dx_dir->dx_block[blk];
605 if (dx_db->flags & DX_FLAG_REFERENCED) {
606 dx_db->flags |= DX_FLAG_DUP_REF;
608 dx_db->flags |= DX_FLAG_REFERENCED;
609 dx_db->parent = db->blockcnt;
615 dx_db->node_min_hash = hash;
617 dx_db->node_max_hash =
618 ext2fs_le32_to_cpu(ent[i+1].hash) & ~1;
620 dx_db->node_max_hash = 0xfffffffe;
621 dx_db->flags |= DX_FLAG_LAST;
624 dx_db->flags |= DX_FLAG_FIRST;
627 printf("Blockcnt = %d, min hash 0x%08x, max hash 0x%08x\n",
628 db->blockcnt, min_hash, max_hash);
630 dx_db = &dx_dir->dx_block[db->blockcnt];
631 dx_db->min_hash = min_hash;
632 dx_db->max_hash = max_hash;
636 clear_htree(cd->ctx, cd->pctx.ino);
637 dx_dir->numblocks = 0;
639 #endif /* ENABLE_HTREE */
642 * Given a busted directory, try to salvage it somehow.
645 static void salvage_directory(ext2_filsys fs,
646 struct ext2_dir_entry *dirent,
647 struct ext2_dir_entry *prev,
648 unsigned int *offset)
650 char *cp = (char *) dirent;
652 unsigned int name_len = dirent->name_len & 0xFF;
654 rec_len = (dirent->rec_len || fs->blocksize < 65536) ?
655 dirent->rec_len : 65536;
656 left = fs->blocksize - *offset - rec_len;
659 * Special case of directory entry of size 8: copy what's left
660 * of the directory block up to cover up the invalid hole.
662 if ((left >= 12) && (rec_len == 8)) {
663 memmove(cp, cp+8, left);
664 memset(cp + left, 0, 8);
668 * If the directory entry overruns the end of the directory
669 * block, and the name is small enough to fit, then adjust the
673 (name_len + 8 <= rec_len + (unsigned) left) &&
674 dirent->inode <= fs->super->s_inodes_count &&
675 strnlen(dirent->name, name_len) == name_len) {
676 dirent->rec_len += left;
680 * If the record length of the directory entry is a multiple
681 * of four, and not too big, such that it is valid, let the
682 * previous directory entry absorb the invalid one.
684 if (prev && rec_len && (rec_len % 4) == 0 &&
685 (*offset + rec_len <= fs->blocksize)) {
686 prev->rec_len += rec_len;
691 * Default salvage method --- kill all of the directory
692 * entries for the rest of the block. We will either try to
693 * absorb it into the previous directory entry, or create a
694 * new empty directory entry the rest of the directory block.
697 prev->rec_len += fs->blocksize - *offset;
698 *offset = fs->blocksize;
700 dirent->rec_len = fs->blocksize - *offset;
701 dirent->name_len = 0;
706 static int check_dir_block(ext2_filsys fs,
707 struct ext2_db_entry *db,
710 struct dx_dir_info *dx_dir;
712 struct dx_dirblock_info *dx_db = 0;
713 #endif /* ENABLE_HTREE */
714 struct ext2_dir_entry *dirent, *prev;
716 unsigned int offset = 0;
718 int dir_modified = 0;
721 blk_t block_nr = db->blk;
722 ext2_ino_t ino = db->ino;
723 ext2_ino_t subdir_parent;
725 struct check_dir_struct *cd;
729 struct ext2_dx_root_info *root;
730 struct ext2_dx_countlimit *limit;
731 static dict_t de_dict;
732 struct problem_context pctx;
736 cd = (struct check_dir_struct *) priv_data;
740 if (ctx->flags & E2F_FLAG_SIGNAL_MASK || ctx->flags & E2F_FLAG_RESTART)
743 if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
747 * Make sure the inode is still in use (could have been
748 * deleted in the duplicate/bad blocks pass.
750 if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map, ino)))
754 cd->pctx.blk = block_nr;
755 cd->pctx.blkcount = db->blockcnt;
761 if (allocate_dir_block(ctx, db, buf, &cd->pctx))
771 if (ctx->dirs_to_hash &&
772 ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
776 printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
780 old_op = ehandler_operation(_("reading directory block"));
781 cd->pctx.errcode = ext2fs_read_dir_block(fs, block_nr, buf);
782 ehandler_operation(0);
783 if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
784 cd->pctx.errcode = 0; /* We'll handle this ourselves */
785 if (cd->pctx.errcode) {
786 if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
787 ctx->flags |= E2F_FLAG_ABORT;
790 memset(buf, 0, fs->blocksize);
793 dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
794 if (dx_dir && dx_dir->numblocks) {
795 if (db->blockcnt >= dx_dir->numblocks) {
796 if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
798 clear_htree(ctx, ino);
799 dx_dir->numblocks = 0;
803 fatal_error(ctx, _("Can not continue."));
805 dx_db = &dx_dir->dx_block[db->blockcnt];
806 dx_db->type = DX_DIRBLOCK_LEAF;
807 dx_db->phys = block_nr;
808 dx_db->min_hash = ~0;
811 dirent = (struct ext2_dir_entry *) buf;
812 rec_len = (dirent->rec_len || fs->blocksize < 65536) ?
813 dirent->rec_len : 65536;
814 limit = (struct ext2_dx_countlimit *) (buf+8);
815 if (db->blockcnt == 0) {
816 root = (struct ext2_dx_root_info *) (buf + 24);
817 dx_db->type = DX_DIRBLOCK_ROOT;
818 dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
819 if ((root->reserved_zero ||
820 root->info_length < 8 ||
821 root->indirect_levels > 1) &&
822 fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
823 clear_htree(ctx, ino);
824 dx_dir->numblocks = 0;
827 dx_dir->hashversion = root->hash_version;
828 if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
829 (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
830 dx_dir->hashversion += 3;
831 dx_dir->depth = root->indirect_levels + 1;
832 } else if ((dirent->inode == 0) &&
833 (rec_len == fs->blocksize) &&
834 (dirent->name_len == 0) &&
835 (ext2fs_le16_to_cpu(limit->limit) ==
837 sizeof(struct ext2_dx_entry))))
838 dx_db->type = DX_DIRBLOCK_NODE;
841 #endif /* ENABLE_HTREE */
843 dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
847 ext2_ino_t first_unused_inode;
850 dirent = (struct ext2_dir_entry *) (buf + offset);
851 rec_len = (dirent->rec_len || fs->blocksize < 65536) ?
852 dirent->rec_len : 65536;
853 cd->pctx.dirent = dirent;
854 cd->pctx.num = offset;
855 if (((offset + rec_len) > fs->blocksize) ||
857 ((rec_len % 4) != 0) ||
858 (((dirent->name_len & 0xFF)+8) > rec_len)) {
859 if (fix_problem(ctx, PR_2_DIR_CORRUPTED, &cd->pctx)) {
860 salvage_directory(fs, dirent, prev, &offset);
864 goto abort_free_dict;
866 if ((dirent->name_len & 0xFF) > EXT2_NAME_LEN) {
867 if (fix_problem(ctx, PR_2_FILENAME_LONG, &cd->pctx)) {
868 dirent->name_len = EXT2_NAME_LEN;
873 if (dot_state == 0) {
874 if (check_dot(ctx, dirent, ino, &cd->pctx))
876 } else if (dot_state == 1) {
877 ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
879 goto abort_free_dict;
882 } else if (dirent->inode == ino) {
883 problem = PR_2_LINK_DOT;
884 if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
894 * Make sure the inode listed is a legal one.
896 if (((dirent->inode != EXT2_ROOT_INO) &&
897 (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
898 (dirent->inode > fs->super->s_inodes_count)) {
899 problem = PR_2_BAD_INO;
900 } else if (ctx->inode_bb_map &&
901 (ext2fs_test_inode_bitmap(ctx->inode_bb_map,
904 * If the inode is in a bad block, offer to
907 problem = PR_2_BB_INODE;
908 } else if ((dot_state > 1) &&
909 ((dirent->name_len & 0xFF) == 1) &&
910 (dirent->name[0] == '.')) {
912 * If there's a '.' entry in anything other
913 * than the first directory entry, it's a
914 * duplicate entry that should be removed.
916 problem = PR_2_DUP_DOT;
917 } else if ((dot_state > 1) &&
918 ((dirent->name_len & 0xFF) == 2) &&
919 (dirent->name[0] == '.') &&
920 (dirent->name[1] == '.')) {
922 * If there's a '..' entry in anything other
923 * than the second directory entry, it's a
924 * duplicate entry that should be removed.
926 problem = PR_2_DUP_DOT_DOT;
927 } else if ((dot_state > 1) &&
928 (dirent->inode == EXT2_ROOT_INO)) {
930 * Don't allow links to the root directory.
931 * We check this specially to make sure we
932 * catch this error case even if the root
933 * directory hasn't been created yet.
935 problem = PR_2_LINK_ROOT;
936 } else if ((dot_state > 1) &&
937 (dirent->name_len & 0xFF) == 0) {
939 * Don't allow zero-length directory names.
941 problem = PR_2_NULL_NAME;
945 if (fix_problem(ctx, problem, &cd->pctx)) {
950 ext2fs_unmark_valid(fs);
951 if (problem == PR_2_BAD_INO)
957 * If the inode was marked as having bad fields in
958 * pass1, process it and offer to fix/clear it.
959 * (We wait until now so that we can display the
960 * pathname to the user.)
962 if (ctx->inode_bad_map &&
963 ext2fs_test_inode_bitmap(ctx->inode_bad_map,
965 if (e2fsck_process_bad_inode(ctx, ino,
967 buf + fs->blocksize)) {
972 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
976 group = ext2fs_group_of_ino(fs, dirent->inode);
977 first_unused_inode = group * fs->super->s_inodes_per_group +
978 1 + fs->super->s_inodes_per_group -
979 fs->group_desc[group].bg_itable_unused;
980 cd->pctx.group = group;
983 * Check if the inode was missed out because _INODE_UNINIT
984 * flag was set or bg_itable_unused was incorrect.
985 * If that is the case restart e2fsck.
986 * XXX Optimisations TODO:
987 * 1. only restart e2fsck once
988 * 2. only exposed inodes are checked again.
990 if (fs->group_desc[group].bg_flags & EXT2_BG_INODE_UNINIT) {
991 if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
993 fs->group_desc[group].bg_flags &=
994 ~EXT2_BG_INODE_UNINIT;
995 ctx->flags |= E2F_FLAG_RESTART |
996 E2F_FLAG_SIGNAL_MASK;
998 ext2fs_unmark_valid(fs);
999 if (problem == PR_2_BAD_INO)
1002 } else if (dirent->inode >= first_unused_inode) {
1003 if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
1004 fs->group_desc[group].bg_itable_unused = 0;
1005 fs->group_desc[group].bg_flags &=
1006 ~EXT2_BG_INODE_UNINIT;
1007 ext2fs_mark_super_dirty(fs);
1008 ctx->flags |= E2F_FLAG_RESTART;
1011 ext2fs_unmark_valid(fs);
1012 if (problem == PR_2_BAD_INO)
1017 if (!(ext2fs_test_inode_bitmap(ctx->inode_used_map,
1020 * If the inode is unused, offer to clear it.
1022 problem = PR_2_UNUSED_INODE;
1026 if (fix_problem(ctx, problem, &cd->pctx)) {
1031 ext2fs_unmark_valid(fs);
1032 if (problem == PR_2_BAD_INO)
1037 if (check_name(ctx, dirent, ino, &cd->pctx))
1040 if (check_filetype(ctx, dirent, ino, &cd->pctx))
1045 ext2fs_dirhash(dx_dir->hashversion, dirent->name,
1046 (dirent->name_len & 0xFF),
1047 fs->super->s_hash_seed, &hash, 0);
1048 if (hash < dx_db->min_hash)
1049 dx_db->min_hash = hash;
1050 if (hash > dx_db->max_hash)
1051 dx_db->max_hash = hash;
1056 * If this is a directory, then mark its parent in its
1057 * dir_info structure. If the parent field is already
1058 * filled in, then this directory has more than one
1059 * hard link. We assume the first link is correct,
1060 * and ask the user if he/she wants to clear this one.
1062 if ((dot_state > 1) &&
1063 (ext2fs_test_inode_bitmap(ctx->inode_dir_map,
1065 if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
1067 cd->pctx.ino = dirent->inode;
1068 fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
1069 goto abort_free_dict;
1071 if (subdir_parent) {
1072 cd->pctx.ino2 = subdir_parent;
1073 if (fix_problem(ctx, PR_2_LINK_DIR,
1081 (void) e2fsck_dir_info_set_parent(ctx,
1082 dirent->inode, ino);
1088 } else if (dict_lookup(&de_dict, dirent)) {
1089 clear_problem_context(&pctx);
1091 pctx.dirent = dirent;
1092 fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
1093 if (!ctx->dirs_to_hash)
1094 ext2fs_u32_list_create(&ctx->dirs_to_hash, 50);
1095 if (ctx->dirs_to_hash)
1096 ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
1099 dict_alloc_insert(&de_dict, dirent, dirent);
1101 ext2fs_icount_increment(ctx->inode_count, dirent->inode,
1104 ctx->fs_links_count++;
1105 ctx->fs_total_count++;
1109 rec_len = (dirent->rec_len || fs->blocksize < 65536) ?
1110 dirent->rec_len : 65536;
1113 } while (offset < fs->blocksize);
1120 printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
1121 db->blockcnt, dx_db->type,
1122 dx_db->min_hash, dx_db->max_hash);
1124 cd->pctx.dir = cd->pctx.ino;
1125 if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
1126 (dx_db->type == DX_DIRBLOCK_NODE))
1127 parse_int_node(fs, db, cd, dx_dir, buf);
1129 #endif /* ENABLE_HTREE */
1130 if (offset != fs->blocksize) {
1131 cd->pctx.num = rec_len - fs->blocksize + offset;
1132 if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
1133 dirent->rec_len = cd->pctx.num;
1138 cd->pctx.errcode = ext2fs_write_dir_block(fs, block_nr, buf);
1139 if (cd->pctx.errcode) {
1140 if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
1142 goto abort_free_dict;
1144 ext2fs_mark_changed(fs);
1146 dict_free_nodes(&de_dict);
1149 ctx->flags |= E2F_FLAG_ABORT;
1151 dict_free_nodes(&de_dict);
1152 return DIRENT_ABORT;
1156 * This function is called to deallocate a block, and is an interator
1157 * functioned called by deallocate inode via ext2fs_iterate_block().
1159 static int deallocate_inode_block(ext2_filsys fs,
1161 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
1162 blk_t ref_block EXT2FS_ATTR((unused)),
1163 int ref_offset EXT2FS_ATTR((unused)),
1166 e2fsck_t ctx = (e2fsck_t) priv_data;
1168 if (HOLE_BLKADDR(*block_nr))
1170 if ((*block_nr < fs->super->s_first_data_block) ||
1171 (*block_nr >= fs->super->s_blocks_count))
1173 ext2fs_unmark_block_bitmap(ctx->block_found_map, *block_nr);
1174 ext2fs_block_alloc_stats(fs, *block_nr, -1);
1179 * This fuction deallocates an inode
1181 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
1183 ext2_filsys fs = ctx->fs;
1184 struct ext2_inode inode;
1185 struct problem_context pctx;
1188 e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
1189 e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
1190 clear_problem_context(&pctx);
1194 * Fix up the bitmaps...
1196 e2fsck_read_bitmaps(ctx);
1197 ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));
1199 if (inode.i_file_acl &&
1200 (fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
1201 pctx.errcode = ext2fs_adjust_ea_refcount(fs, inode.i_file_acl,
1202 block_buf, -1, &count);
1203 if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
1208 pctx.blk = inode.i_file_acl;
1209 fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
1210 ctx->flags |= E2F_FLAG_ABORT;
1214 ext2fs_unmark_block_bitmap(ctx->block_found_map,
1216 ext2fs_block_alloc_stats(fs, inode.i_file_acl, -1);
1218 inode.i_file_acl = 0;
1221 if (!ext2fs_inode_has_valid_blocks(&inode))
1224 if (LINUX_S_ISREG(inode.i_mode) &&
1225 (inode.i_size_high || inode.i_size & 0x80000000UL))
1228 pctx.errcode = ext2fs_block_iterate2(fs, ino, 0, block_buf,
1229 deallocate_inode_block, ctx);
1231 fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
1232 ctx->flags |= E2F_FLAG_ABORT;
1238 * This fuction clears the htree flag on an inode
1240 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino)
1242 struct ext2_inode inode;
1244 e2fsck_read_inode(ctx, ino, &inode, "clear_htree");
1245 inode.i_flags = inode.i_flags & ~EXT2_INDEX_FL;
1246 e2fsck_write_inode(ctx, ino, &inode, "clear_htree");
1247 if (ctx->dirs_to_hash)
1248 ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
1252 extern int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
1253 ext2_ino_t ino, char *buf)
1255 ext2_filsys fs = ctx->fs;
1256 struct ext2_inode inode;
1257 int inode_modified = 0;
1259 unsigned char *frag, *fsize;
1260 struct problem_context pctx;
1263 e2fsck_read_inode(ctx, ino, &inode, "process_bad_inode");
1265 clear_problem_context(&pctx);
1268 pctx.inode = &inode;
1270 if (inode.i_file_acl &&
1271 !(fs->super->s_feature_compat & EXT2_FEATURE_COMPAT_EXT_ATTR)) {
1272 if (fix_problem(ctx, PR_2_FILE_ACL_ZERO, &pctx)) {
1273 inode.i_file_acl = 0;
1279 if (!LINUX_S_ISDIR(inode.i_mode) && !LINUX_S_ISREG(inode.i_mode) &&
1280 !LINUX_S_ISCHR(inode.i_mode) && !LINUX_S_ISBLK(inode.i_mode) &&
1281 !LINUX_S_ISLNK(inode.i_mode) && !LINUX_S_ISFIFO(inode.i_mode) &&
1282 !(LINUX_S_ISSOCK(inode.i_mode)))
1283 problem = PR_2_BAD_MODE;
1284 else if (LINUX_S_ISCHR(inode.i_mode)
1285 && !e2fsck_pass1_check_device_inode(fs, &inode))
1286 problem = PR_2_BAD_CHAR_DEV;
1287 else if (LINUX_S_ISBLK(inode.i_mode)
1288 && !e2fsck_pass1_check_device_inode(fs, &inode))
1289 problem = PR_2_BAD_BLOCK_DEV;
1290 else if (LINUX_S_ISFIFO(inode.i_mode)
1291 && !e2fsck_pass1_check_device_inode(fs, &inode))
1292 problem = PR_2_BAD_FIFO;
1293 else if (LINUX_S_ISSOCK(inode.i_mode)
1294 && !e2fsck_pass1_check_device_inode(fs, &inode))
1295 problem = PR_2_BAD_SOCKET;
1296 else if (LINUX_S_ISLNK(inode.i_mode)
1297 && !e2fsck_pass1_check_symlink(fs, ino, &inode, buf)) {
1298 problem = PR_2_INVALID_SYMLINK;
1302 if (fix_problem(ctx, problem, &pctx)) {
1303 deallocate_inode(ctx, ino, 0);
1304 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1312 if (inode.i_faddr) {
1313 if (fix_problem(ctx, PR_2_FADDR_ZERO, &pctx)) {
1320 switch (fs->super->s_creator_os) {
1322 frag = &inode.osd2.hurd2.h_i_frag;
1323 fsize = &inode.osd2.hurd2.h_i_fsize;
1328 if (frag && *frag) {
1330 if (fix_problem(ctx, PR_2_FRAG_ZERO, &pctx)) {
1337 if (fsize && *fsize) {
1339 if (fix_problem(ctx, PR_2_FSIZE_ZERO, &pctx)) {
1347 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1348 !(fs->super->s_feature_ro_compat &
1349 EXT4_FEATURE_RO_COMPAT_HUGE_FILE) &&
1350 (inode.osd2.linux2.l_i_blocks_hi != 0)) {
1351 pctx.num = inode.osd2.linux2.l_i_blocks_hi;
1352 if (fix_problem(ctx, PR_2_BLOCKS_HI_ZERO, &pctx)) {
1353 inode.osd2.linux2.l_i_blocks_hi = 0;
1358 if (inode.i_file_acl &&
1359 ((inode.i_file_acl < fs->super->s_first_data_block) ||
1360 (inode.i_file_acl >= fs->super->s_blocks_count))) {
1361 if (fix_problem(ctx, PR_2_FILE_ACL_BAD, &pctx)) {
1362 inode.i_file_acl = 0;
1367 if (inode.i_dir_acl &&
1368 LINUX_S_ISDIR(inode.i_mode)) {
1369 if (fix_problem(ctx, PR_2_DIR_ACL_ZERO, &pctx)) {
1370 inode.i_dir_acl = 0;
1377 e2fsck_write_inode(ctx, ino, &inode, "process_bad_inode");
1378 if (!not_fixed && ctx->inode_bad_map)
1379 ext2fs_unmark_inode_bitmap(ctx->inode_bad_map, ino);
1385 * allocate_dir_block --- this function allocates a new directory
1386 * block for a particular inode; this is done if a directory has
1387 * a "hole" in it, or if a directory has a illegal block number
1388 * that was zeroed out and now needs to be replaced.
1390 static int allocate_dir_block(e2fsck_t ctx,
1391 struct ext2_db_entry *db,
1392 char *buf EXT2FS_ATTR((unused)),
1393 struct problem_context *pctx)
1395 ext2_filsys fs = ctx->fs;
1398 struct ext2_inode inode;
1400 if (fix_problem(ctx, PR_2_DIRECTORY_HOLE, pctx) == 0)
1404 * Read the inode and block bitmaps in; we'll be messing with
1407 e2fsck_read_bitmaps(ctx);
1410 * First, find a free block
1412 pctx->errcode = ext2fs_new_block(fs, 0, ctx->block_found_map, &blk);
1413 if (pctx->errcode) {
1414 pctx->str = "ext2fs_new_block";
1415 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1418 ext2fs_mark_block_bitmap(ctx->block_found_map, blk);
1419 ext2fs_mark_block_bitmap(fs->block_map, blk);
1420 ext2fs_mark_bb_dirty(fs);
1423 * Now let's create the actual data block for the inode
1426 pctx->errcode = ext2fs_new_dir_block(fs, 0, 0, &block);
1428 pctx->errcode = ext2fs_new_dir_block(fs, db->ino,
1429 EXT2_ROOT_INO, &block);
1431 if (pctx->errcode) {
1432 pctx->str = "ext2fs_new_dir_block";
1433 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1437 pctx->errcode = ext2fs_write_dir_block(fs, blk, block);
1438 ext2fs_free_mem(&block);
1439 if (pctx->errcode) {
1440 pctx->str = "ext2fs_write_dir_block";
1441 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1446 * Update the inode block count
1448 e2fsck_read_inode(ctx, db->ino, &inode, "allocate_dir_block");
1449 ext2fs_iblk_add_blocks(fs, &inode, 1);
1450 if (inode.i_size < (db->blockcnt+1) * fs->blocksize)
1451 inode.i_size = (db->blockcnt+1) * fs->blocksize;
1452 e2fsck_write_inode(ctx, db->ino, &inode, "allocate_dir_block");
1455 * Finally, update the block pointers for the inode
1458 pctx->errcode = ext2fs_block_iterate2(fs, db->ino, BLOCK_FLAG_HOLE,
1459 0, update_dir_block, db);
1460 if (pctx->errcode) {
1461 pctx->str = "ext2fs_block_iterate";
1462 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
1470 * This is a helper function for allocate_dir_block().
1472 static int update_dir_block(ext2_filsys fs EXT2FS_ATTR((unused)),
1474 e2_blkcnt_t blockcnt,
1475 blk_t ref_block EXT2FS_ATTR((unused)),
1476 int ref_offset EXT2FS_ATTR((unused)),
1479 struct ext2_db_entry *db;
1481 db = (struct ext2_db_entry *) priv_data;
1482 if (db->blockcnt == (int) blockcnt) {
1483 *block_nr = db->blk;
1484 return BLOCK_CHANGED;