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
38 * - The encrypted_file_info
39 * - The inode_casefold_map bitmap
41 * Pass 2 frees the following data structures
42 * - The inode_bad_map bitmap
43 * - The inode_reg_map bitmap
44 * - The encrypted_file_info
45 * - The inode_casefold_map bitmap
48 #define _GNU_SOURCE 1 /* get strnlen() */
54 #include "support/dict.h"
56 #ifdef NO_INLINE_FUNCS
59 #define _INLINE_ inline
62 /* #define DX_DEBUG */
65 * Keeps track of how many times an inode is referenced.
67 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf);
68 static int check_dir_block2(ext2_filsys fs,
69 struct ext2_db_entry2 *dir_blocks_info,
71 static int check_dir_block(ext2_filsys fs,
72 struct ext2_db_entry2 *dir_blocks_info,
74 static int allocate_dir_block(e2fsck_t ctx,
75 struct ext2_db_entry2 *dir_blocks_info,
76 char *buf, struct problem_context *pctx);
77 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino);
78 static short htree_depth(struct dx_dir_info *dx_dir,
79 struct dx_dirblock_info *dx_db);
80 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b);
82 struct check_dir_struct {
84 struct problem_context pctx;
87 unsigned long long list_offset;
88 unsigned long long ra_entries;
89 unsigned long long next_ra_off;
92 static void update_parents(struct dx_dir_info *dx_dir, int type)
94 struct dx_dirblock_info *dx_db, *dx_parent, *dx_previous;
97 for (b = 0, dx_db = dx_dir->dx_block;
98 b < dx_dir->numblocks;
100 dx_parent = &dx_dir->dx_block[dx_db->parent];
101 if (dx_db->type != type)
105 * XXX Make sure dx_parent->min_hash > dx_db->min_hash
107 if (dx_db->flags & DX_FLAG_FIRST) {
108 dx_parent->min_hash = dx_db->min_hash;
109 if (dx_parent->previous) {
111 &dx_dir->dx_block[dx_parent->previous];
112 dx_previous->node_max_hash =
117 * XXX Make sure dx_parent->max_hash < dx_db->max_hash
119 if (dx_db->flags & DX_FLAG_LAST) {
120 dx_parent->max_hash = dx_db->max_hash;
125 void e2fsck_pass2(e2fsck_t ctx)
127 struct ext2_super_block *sb = ctx->fs->super;
128 struct problem_context pctx;
129 ext2_filsys fs = ctx->fs;
131 #ifdef RESOURCE_TRACK
132 struct resource_track rtrack;
134 struct check_dir_struct cd;
135 struct dx_dir_info *dx_dir;
136 struct dx_dirblock_info *dx_db;
142 int (*check_dir_func)(ext2_filsys fs,
143 struct ext2_db_entry2 *dir_blocks_info,
146 init_resource_track(&rtrack, ctx->fs->io);
147 clear_problem_context(&cd.pctx);
150 mtrace_print("Pass 2");
153 if (!(ctx->options & E2F_OPT_PREEN))
154 fix_problem(ctx, PR_2_PASS_HEADER, &cd.pctx);
156 cd.pctx.errcode = e2fsck_setup_icount(ctx, "inode_count",
157 EXT2_ICOUNT_OPT_INCREMENT,
158 ctx->inode_link_info, &ctx->inode_count);
159 if (cd.pctx.errcode) {
160 fix_problem(ctx, PR_2_ALLOCATE_ICOUNT, &cd.pctx);
161 ctx->flags |= E2F_FLAG_ABORT;
164 buf = (char *) e2fsck_allocate_memory(ctx, 2*fs->blocksize,
165 "directory scan buffer");
168 * Set up the parent pointer for the root directory, if
169 * present. (If the root directory is not present, we will
170 * create it in pass 3.)
172 (void) e2fsck_dir_info_set_parent(ctx, EXT2_ROOT_INO, EXT2_ROOT_INO);
177 cd.max = ext2fs_dblist_count2(fs->dblist);
179 cd.ra_entries = ctx->readahead_kb * 1024 / ctx->fs->blocksize;
183 (void) (ctx->progress)(ctx, 2, 0, cd.max);
185 if (ext2fs_has_feature_dir_index(fs->super))
186 ext2fs_dblist_sort2(fs->dblist, special_dir_block_cmp);
188 check_dir_func = cd.ra_entries ? check_dir_block2 : check_dir_block;
189 cd.pctx.errcode = ext2fs_dblist_iterate2(fs->dblist, check_dir_func,
191 if (ctx->flags & E2F_FLAG_RESTART_LATER) {
192 ctx->flags |= E2F_FLAG_RESTART;
193 ctx->flags &= ~E2F_FLAG_RESTART_LATER;
196 if (ctx->flags & E2F_FLAG_RUN_RETURN)
199 if (cd.pctx.errcode) {
200 fix_problem(ctx, PR_2_DBLIST_ITERATE, &cd.pctx);
201 ctx->flags |= E2F_FLAG_ABORT;
205 for (i=0; (dx_dir = e2fsck_dx_dir_info_iter(ctx, &i)) != 0;) {
206 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
208 if (e2fsck_dir_will_be_rehashed(ctx, dx_dir->ino) ||
209 dx_dir->numblocks == 0)
211 clear_problem_context(&pctx);
213 pctx.dir = dx_dir->ino;
214 dx_db = dx_dir->dx_block;
215 if (dx_db->flags & DX_FLAG_REFERENCED)
216 dx_db->flags |= DX_FLAG_DUP_REF;
218 dx_db->flags |= DX_FLAG_REFERENCED;
220 * Find all of the first and last leaf blocks, and
221 * update their parent's min and max hash values
223 update_parents(dx_dir, DX_DIRBLOCK_LEAF);
225 /* for 3 level htree: update 2 level parent's min
226 * and max hash values */
227 update_parents(dx_dir, DX_DIRBLOCK_NODE);
229 for (b=0, dx_db = dx_dir->dx_block;
230 b < dx_dir->numblocks;
233 pctx.group = dx_db->parent;
235 if (!(dx_db->flags & DX_FLAG_FIRST) &&
236 (dx_db->min_hash < dx_db->node_min_hash)) {
237 pctx.blk = dx_db->min_hash;
238 pctx.blk2 = dx_db->node_min_hash;
239 code = PR_2_HTREE_MIN_HASH;
240 fix_problem(ctx, code, &pctx);
243 if (dx_db->type == DX_DIRBLOCK_LEAF) {
244 depth = htree_depth(dx_dir, dx_db);
245 if (depth != dx_dir->depth) {
246 pctx.num = dx_dir->depth;
247 code = PR_2_HTREE_BAD_DEPTH;
248 fix_problem(ctx, code, &pctx);
253 * This test doesn't apply for the root block
257 (dx_db->max_hash > dx_db->node_max_hash)) {
258 pctx.blk = dx_db->max_hash;
259 pctx.blk2 = dx_db->node_max_hash;
260 code = PR_2_HTREE_MAX_HASH;
261 fix_problem(ctx, code, &pctx);
264 if (!(dx_db->flags & DX_FLAG_REFERENCED)) {
265 code = PR_2_HTREE_NOTREF;
266 fix_problem(ctx, code, &pctx);
268 } else if (dx_db->flags & DX_FLAG_DUP_REF) {
269 code = PR_2_HTREE_DUPREF;
270 fix_problem(ctx, code, &pctx);
274 if (bad_dir && fix_problem(ctx, PR_2_HTREE_CLEAR, &pctx)) {
275 clear_htree(ctx, dx_dir->ino);
276 dx_dir->numblocks = 0;
279 e2fsck_free_dx_dir_info(ctx);
281 ext2fs_free_mem(&buf);
282 ext2fs_free_dblist(fs->dblist);
284 if (ctx->inode_bad_map) {
285 ext2fs_free_inode_bitmap(ctx->inode_bad_map);
286 ctx->inode_bad_map = 0;
288 if (ctx->inode_reg_map) {
289 ext2fs_free_inode_bitmap(ctx->inode_reg_map);
290 ctx->inode_reg_map = 0;
292 if (ctx->inode_casefold_map) {
293 ext2fs_free_inode_bitmap(ctx->inode_casefold_map);
294 ctx->inode_casefold_map = 0;
296 destroy_encrypted_file_info(ctx);
297 if (ctx->casefolded_dirs) {
298 ext2fs_u32_list_free(ctx->casefolded_dirs);
299 ctx->casefolded_dirs = 0;
302 clear_problem_context(&pctx);
303 if (ctx->large_files) {
304 if (!ext2fs_has_feature_large_file(sb) &&
305 fix_problem(ctx, PR_2_FEATURE_LARGE_FILES, &pctx)) {
306 ext2fs_set_feature_large_file(sb);
307 fs->flags &= ~EXT2_FLAG_MASTER_SB_ONLY;
308 ext2fs_mark_super_dirty(fs);
310 if (sb->s_rev_level == EXT2_GOOD_OLD_REV &&
311 fix_problem(ctx, PR_1_FS_REV_LEVEL, &pctx)) {
312 ext2fs_update_dynamic_rev(fs);
313 ext2fs_mark_super_dirty(fs);
317 print_resource_track(ctx, _("Pass 2"), &rtrack, fs->io);
319 ext2fs_free_mem(&buf);
322 #define MAX_DEPTH 32000
323 static short htree_depth(struct dx_dir_info *dx_dir,
324 struct dx_dirblock_info *dx_db)
328 while (dx_db->type != DX_DIRBLOCK_ROOT && depth < MAX_DEPTH) {
329 dx_db = &dx_dir->dx_block[dx_db->parent];
335 static int dict_de_cmp(const void *cmp_ctx, const void *a, const void *b)
337 const struct ext2_dir_entry *de_a, *de_b;
340 de_a = (const struct ext2_dir_entry *) a;
341 a_len = ext2fs_dirent_name_len(de_a);
342 de_b = (const struct ext2_dir_entry *) b;
343 b_len = ext2fs_dirent_name_len(de_b);
346 return (a_len - b_len);
348 return memcmp(de_a->name, de_b->name, a_len);
351 static int dict_de_cf_cmp(const void *cmp_ctx, const void *a, const void *b)
353 const struct ext2fs_nls_table *tbl = cmp_ctx;
354 const struct ext2_dir_entry *de_a, *de_b;
357 de_a = (const struct ext2_dir_entry *) a;
358 a_len = ext2fs_dirent_name_len(de_a);
359 de_b = (const struct ext2_dir_entry *) b;
360 b_len = ext2fs_dirent_name_len(de_b);
362 return ext2fs_casefold_cmp(tbl, (unsigned char *) de_a->name, a_len,
363 (unsigned char *) de_b->name, b_len);
367 * This is special sort function that makes sure that directory blocks
368 * with a dirblock of zero are sorted to the beginning of the list.
369 * This guarantees that the root node of the htree directories are
370 * processed first, so we know what hash version to use.
372 static EXT2_QSORT_TYPE special_dir_block_cmp(const void *a, const void *b)
374 const struct ext2_db_entry2 *db_a =
375 (const struct ext2_db_entry2 *) a;
376 const struct ext2_db_entry2 *db_b =
377 (const struct ext2_db_entry2 *) b;
379 if (db_a->blockcnt && !db_b->blockcnt)
382 if (!db_a->blockcnt && db_b->blockcnt)
385 if (db_a->blk != db_b->blk)
386 return (int) (db_a->blk - db_b->blk);
388 if (db_a->ino != db_b->ino)
389 return (int) (db_a->ino - db_b->ino);
391 return (int) (db_a->blockcnt - db_b->blockcnt);
396 * Make sure the first entry in the directory is '.', and that the
397 * directory entry is sane.
399 static int check_dot(e2fsck_t ctx,
400 struct ext2_dir_entry *dirent,
401 ext2_ino_t ino, struct problem_context *pctx)
403 struct ext2_dir_entry *nextdir;
404 unsigned int rec_len, new_len;
407 problem_t problem = 0;
410 problem = PR_2_MISSING_DOT;
411 else if ((ext2fs_dirent_name_len(dirent) != 1) ||
412 (dirent->name[0] != '.'))
413 problem = PR_2_1ST_NOT_DOT;
414 else if (dirent->name[1] != '\0')
415 problem = PR_2_DOT_NULL_TERM;
417 (void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
419 if (fix_problem(ctx, problem, pctx)) {
421 rec_len = dirent->rec_len = 12;
423 ext2fs_dirent_set_name_len(dirent, 1);
424 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
425 dirent->name[0] = '.';
426 dirent->name[1] = '\0';
431 if (dirent->inode != ino) {
432 if (fix_problem(ctx, PR_2_BAD_INODE_DOT, pctx)) {
438 new_len = rec_len - 12;
441 fix_problem(ctx, PR_2_SPLIT_DOT, pctx)) {
442 nextdir = (struct ext2_dir_entry *)
443 ((char *) dirent + 12);
444 dirent->rec_len = 12;
445 (void) ext2fs_set_rec_len(ctx->fs, new_len,
448 ext2fs_dirent_set_name_len(nextdir, 0);
449 ext2fs_dirent_set_file_type(nextdir,
459 * Make sure the second entry in the directory is '..', and that the
460 * directory entry is sane. We do not check the inode number of '..'
461 * here; this gets done in pass 3.
463 static int check_dotdot(e2fsck_t ctx,
464 struct ext2_dir_entry *dirent,
465 ext2_ino_t ino, struct problem_context *pctx)
467 problem_t problem = 0;
468 unsigned int rec_len;
471 problem = PR_2_MISSING_DOT_DOT;
472 else if ((ext2fs_dirent_name_len(dirent) != 2) ||
473 (dirent->name[0] != '.') ||
474 (dirent->name[1] != '.'))
475 problem = PR_2_2ND_NOT_DOT_DOT;
476 else if (dirent->name[2] != '\0')
477 problem = PR_2_DOT_DOT_NULL_TERM;
479 (void) ext2fs_get_rec_len(ctx->fs, dirent, &rec_len);
481 if (fix_problem(ctx, problem, pctx)) {
483 dirent->rec_len = 12;
485 * Note: we don't have the parent inode just
486 * yet, so we will fill it in with the root
487 * inode. This will get fixed in pass 3.
489 dirent->inode = EXT2_ROOT_INO;
490 ext2fs_dirent_set_name_len(dirent, 2);
491 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
492 dirent->name[0] = '.';
493 dirent->name[1] = '.';
494 dirent->name[2] = '\0';
499 if (e2fsck_dir_info_set_dotdot(ctx, ino, dirent->inode)) {
500 fix_problem(ctx, PR_2_NO_DIRINFO, pctx);
507 * Check to make sure a directory entry doesn't contain any illegal
510 static int check_name(e2fsck_t ctx,
511 struct ext2_dir_entry *dirent,
512 struct problem_context *pctx)
518 for ( i = 0; i < ext2fs_dirent_name_len(dirent); i++) {
519 if (dirent->name[i] != '/' && dirent->name[i] != '\0')
522 fixup = fix_problem(ctx, PR_2_BAD_NAME, pctx);
525 dirent->name[i] = '.';
531 static int encrypted_check_name(e2fsck_t ctx,
532 const struct ext2_dir_entry *dirent,
533 struct problem_context *pctx)
535 if (ext2fs_dirent_name_len(dirent) < EXT4_CRYPTO_BLOCK_SIZE) {
536 if (fix_problem(ctx, PR_2_BAD_ENCRYPTED_NAME, pctx))
538 ext2fs_unmark_valid(ctx->fs);
543 static int encoded_check_name(e2fsck_t ctx,
544 struct ext2_dir_entry *dirent,
545 struct problem_context *pctx)
547 const struct ext2fs_nls_table *tbl = ctx->fs->encoding;
549 int len = ext2fs_dirent_name_len(dirent);
552 ret = ext2fs_check_encoded_name(tbl, dirent->name, len, &pos);
554 fatal_error(ctx, _("NLS is broken."));
556 ret = fix_problem(ctx, PR_2_BAD_ENCODED_NAME, pctx);
558 end = &dirent->name[len];
559 for (; *pos && pos != end; pos++)
564 return (ret || check_name(ctx, dirent, pctx));
568 * Check the directory filetype (if present)
570 static _INLINE_ int check_filetype(e2fsck_t ctx,
571 struct ext2_dir_entry *dirent,
572 ext2_ino_t dir_ino EXT2FS_ATTR((unused)),
573 struct problem_context *pctx)
575 int filetype = ext2fs_dirent_file_type(dirent);
576 int should_be = EXT2_FT_UNKNOWN;
577 struct ext2_inode inode;
579 if (!ext2fs_has_feature_filetype(ctx->fs->super)) {
581 !fix_problem(ctx, PR_2_CLEAR_FILETYPE, pctx))
583 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
587 if (ext2fs_test_inode_bitmap2(ctx->inode_dir_map, dirent->inode)) {
588 should_be = EXT2_FT_DIR;
589 } else if (ext2fs_test_inode_bitmap2(ctx->inode_reg_map,
591 should_be = EXT2_FT_REG_FILE;
592 } else if (ctx->inode_bad_map &&
593 ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
597 e2fsck_read_inode(ctx, dirent->inode, &inode,
599 should_be = ext2_file_type(inode.i_mode);
601 if (filetype == should_be)
603 pctx->num = should_be;
605 if (fix_problem(ctx, filetype ? PR_2_BAD_FILETYPE : PR_2_SET_FILETYPE,
609 ext2fs_dirent_set_file_type(dirent, should_be);
613 static void parse_int_node(ext2_filsys fs,
614 struct ext2_db_entry2 *db,
615 struct check_dir_struct *cd,
616 struct dx_dir_info *dx_dir,
617 char *block_buf, int failed_csum)
619 struct ext2_dx_root_info *root;
620 struct ext2_dx_entry *ent;
621 struct ext2_dx_countlimit *limit;
622 struct dx_dirblock_info *dx_db;
623 int i, expect_limit, count;
625 ext2_dirhash_t min_hash = 0xffffffff;
626 ext2_dirhash_t max_hash = 0;
627 ext2_dirhash_t hash = 0, prev_hash;
630 if (db->blockcnt == 0) {
631 root = (struct ext2_dx_root_info *) (block_buf + 24);
634 printf("Root node dump:\n");
635 printf("\t Reserved zero: %u\n", root->reserved_zero);
636 printf("\t Hash Version: %u\n", root->hash_version);
637 printf("\t Info length: %u\n", root->info_length);
638 printf("\t Indirect levels: %u\n", root->indirect_levels);
639 printf("\t Flags: %x\n", root->unused_flags);
642 ent = (struct ext2_dx_entry *) (block_buf + 24 + root->info_length);
645 (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
646 fix_problem(cd->ctx, PR_2_HTREE_ROOT_CSUM_INVALID,
650 ent = (struct ext2_dx_entry *) (block_buf+8);
653 (e2fsck_dir_will_be_rehashed(cd->ctx, cd->pctx.ino) ||
654 fix_problem(cd->ctx, PR_2_HTREE_NODE_CSUM_INVALID,
659 limit = (struct ext2_dx_countlimit *) ent;
662 printf("Number of entries (count): %d\n",
663 ext2fs_le16_to_cpu(limit->count));
664 printf("Number of entries (limit): %d\n",
665 ext2fs_le16_to_cpu(limit->limit));
668 count = ext2fs_le16_to_cpu(limit->count);
669 if (ext2fs_has_feature_metadata_csum(fs->super))
670 csum_size = sizeof(struct ext2_dx_tail);
671 expect_limit = (fs->blocksize -
672 (csum_size + ((char *) ent - block_buf))) /
673 sizeof(struct ext2_dx_entry);
674 if (ext2fs_le16_to_cpu(limit->limit) != expect_limit) {
675 cd->pctx.num = ext2fs_le16_to_cpu(limit->limit);
676 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_LIMIT, &cd->pctx))
679 if (count > expect_limit) {
680 cd->pctx.num = count;
681 if (fix_problem(cd->ctx, PR_2_HTREE_BAD_COUNT, &cd->pctx))
683 count = expect_limit;
686 for (i=0; i < count; i++) {
688 hash = i ? (ext2fs_le32_to_cpu(ent[i].hash) & ~1) : 0;
690 printf("Entry #%d: Hash 0x%08x, block %u\n", i,
691 hash, ext2fs_le32_to_cpu(ent[i].block));
693 blk = ext2fs_le32_to_cpu(ent[i].block) & EXT4_DX_BLOCK_MASK;
694 /* Check to make sure the block is valid */
695 if (blk >= dx_dir->numblocks) {
697 if (fix_problem(cd->ctx, PR_2_HTREE_BADBLK,
702 if (hash < prev_hash &&
703 fix_problem(cd->ctx, PR_2_HTREE_HASH_ORDER, &cd->pctx))
705 dx_db = &dx_dir->dx_block[blk];
706 if (dx_db->flags & DX_FLAG_REFERENCED) {
707 dx_db->flags |= DX_FLAG_DUP_REF;
709 dx_db->flags |= DX_FLAG_REFERENCED;
710 dx_db->parent = db->blockcnt;
714 i ? (ext2fs_le32_to_cpu(ent[i-1].block) &
715 EXT4_DX_BLOCK_MASK) : 0;
721 dx_db->node_min_hash = hash;
723 dx_db->node_max_hash =
724 ext2fs_le32_to_cpu(ent[i+1].hash) & ~1;
726 dx_db->node_max_hash = 0xfffffffe;
727 dx_db->flags |= DX_FLAG_LAST;
730 dx_db->flags |= DX_FLAG_FIRST;
733 printf("Blockcnt = %d, min hash 0x%08x, max hash 0x%08x\n",
734 db->blockcnt, min_hash, max_hash);
736 dx_db = &dx_dir->dx_block[db->blockcnt];
737 dx_db->min_hash = min_hash;
738 dx_db->max_hash = max_hash;
742 clear_htree(cd->ctx, cd->pctx.ino);
743 dx_dir->numblocks = 0;
744 e2fsck_rehash_dir_later(cd->ctx, cd->pctx.ino);
748 * Given a busted directory, try to salvage it somehow.
751 static void salvage_directory(ext2_filsys fs,
752 struct ext2_dir_entry *dirent,
753 struct ext2_dir_entry *prev,
754 unsigned int *offset,
755 unsigned int block_len,
758 char *cp = (char *) dirent;
760 unsigned int rec_len, prev_rec_len;
761 unsigned int name_len;
764 * If the space left for the entry is too small to be an entry,
765 * we can't access dirent's fields, so plumb in the values needed
766 * so that the previous entry absorbs this one.
768 if (block_len - *offset < EXT2_DIR_ENTRY_HEADER_LEN) {
770 rec_len = block_len - *offset;
772 name_len = ext2fs_dirent_name_len(dirent);
773 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
775 left = block_len - *offset - rec_len;
778 * Special case of directory entry of size 8: copy what's left
779 * of the directory block up to cover up the invalid hole.
781 if ((left >= ext2fs_dir_rec_len(1, hash_in_dirent)) &&
782 (rec_len == EXT2_DIR_ENTRY_HEADER_LEN)) {
783 memmove(cp, cp+EXT2_DIR_ENTRY_HEADER_LEN, left);
784 memset(cp + left, 0, EXT2_DIR_ENTRY_HEADER_LEN);
788 * If the directory entry overruns the end of the directory
789 * block, and the name is small enough to fit, then adjust the
793 ((int) rec_len + left > EXT2_DIR_ENTRY_HEADER_LEN) &&
794 ((int) ext2fs_dir_rec_len(name_len, hash_in_dirent) <= (int) rec_len + left) &&
795 dirent->inode <= fs->super->s_inodes_count &&
796 strnlen(dirent->name, name_len) == name_len) {
797 (void) ext2fs_set_rec_len(fs, (int) rec_len + left, dirent);
801 * If the record length of the directory entry is a multiple
802 * of four, and not too big, such that it is valid, let the
803 * previous directory entry absorb the invalid one.
805 if (prev && rec_len && (rec_len % 4) == 0 &&
806 (*offset + rec_len <= block_len)) {
807 (void) ext2fs_get_rec_len(fs, prev, &prev_rec_len);
808 prev_rec_len += rec_len;
809 (void) ext2fs_set_rec_len(fs, prev_rec_len, prev);
814 * Default salvage method --- kill all of the directory
815 * entries for the rest of the block. We will either try to
816 * absorb it into the previous directory entry, or create a
817 * new empty directory entry the rest of the directory block.
820 (void) ext2fs_get_rec_len(fs, prev, &prev_rec_len);
821 prev_rec_len += block_len - *offset;
822 (void) ext2fs_set_rec_len(fs, prev_rec_len, prev);
823 *offset = fs->blocksize;
825 rec_len = block_len - *offset;
826 (void) ext2fs_set_rec_len(fs, rec_len, dirent);
827 ext2fs_dirent_set_name_len(dirent, 0);
828 ext2fs_dirent_set_file_type(dirent, EXT2_FT_UNKNOWN);
833 #define NEXT_DIRENT(d) ((void *)((char *)(d) + (d)->rec_len))
834 static errcode_t insert_dirent_tail(ext2_filsys fs, void *dirbuf)
836 struct ext2_dir_entry *d;
838 struct ext2_dir_entry_tail *t;
841 top = EXT2_DIRENT_TAIL(dirbuf, fs->blocksize);
843 while (d->rec_len && !(d->rec_len & 0x3) && NEXT_DIRENT(d) <= top)
847 unsigned int min_size = EXT2_DIR_REC_LEN(
848 ext2fs_dirent_name_len(dirbuf));
849 if (min_size > (char *)top - (char *)d)
850 return EXT2_ET_DIR_NO_SPACE_FOR_CSUM;
851 d->rec_len = (char *)top - (char *)d;
854 t = (struct ext2_dir_entry_tail *)top;
855 if (t->det_reserved_zero1 ||
856 t->det_rec_len != sizeof(struct ext2_dir_entry_tail) ||
857 t->det_reserved_name_len != EXT2_DIR_NAME_LEN_CSUM)
858 ext2fs_initialize_dirent_tail(fs, t);
864 static errcode_t fix_inline_dir_size(e2fsck_t ctx, ext2_ino_t ino,
865 size_t *inline_data_size,
866 struct problem_context *pctx,
869 ext2_filsys fs = ctx->fs;
870 struct ext2_inode inode;
871 size_t new_size, old_size;
874 old_size = *inline_data_size;
876 * If there's not enough bytes to start the "second" dir block
877 * (in the EA space) then truncate everything to the first block.
879 if (old_size > EXT4_MIN_INLINE_DATA_SIZE &&
880 old_size < EXT4_MIN_INLINE_DATA_SIZE +
881 EXT2_DIR_REC_LEN(1)) {
882 old_size = EXT4_MIN_INLINE_DATA_SIZE;
885 /* Increase to the next four-byte boundary for salvaging */
886 new_size = old_size + (4 - (old_size & 3));
887 memset(buf + old_size, 0, new_size - old_size);
888 retval = ext2fs_inline_data_set(fs, ino, 0, buf, new_size);
889 if (retval == EXT2_ET_INLINE_DATA_NO_SPACE) {
890 /* Or we can't, so truncate. */
892 retval = ext2fs_inline_data_set(fs, ino, 0, buf, new_size);
894 if (fix_problem(ctx, PR_2_FIX_INLINE_DIR_FAILED,
902 if (fix_problem(ctx, PR_2_FIX_INLINE_DIR_FAILED,
911 retval = ext2fs_read_inode(fs, ino, &inode);
915 retval = ext2fs_inode_size_set(fs, &inode, new_size);
919 inode.i_flags &= ~EXT4_INLINE_DATA_FL;
920 retval = ext2fs_write_inode(fs, ino, &inode);
923 *inline_data_size = new_size;
929 /* Return true if this type of file needs encryption */
930 static int needs_encryption(e2fsck_t ctx, const struct ext2_dir_entry *dirent)
932 int filetype = ext2fs_dirent_file_type(dirent);
933 ext2_ino_t ino = dirent->inode;
934 struct ext2_inode inode;
936 if (filetype != EXT2_FT_UNKNOWN)
937 return filetype == EXT2_FT_REG_FILE ||
938 filetype == EXT2_FT_DIR ||
939 filetype == EXT2_FT_SYMLINK;
941 if (ext2fs_test_inode_bitmap2(ctx->inode_reg_map, ino) ||
942 ext2fs_test_inode_bitmap2(ctx->inode_dir_map, ino))
945 e2fsck_read_inode(ctx, ino, &inode, "check_encryption_policy");
946 return LINUX_S_ISREG(inode.i_mode) ||
947 LINUX_S_ISDIR(inode.i_mode) ||
948 LINUX_S_ISLNK(inode.i_mode);
952 * All regular files, directories, and symlinks in encrypted directories must be
953 * encrypted using the same encryption policy as their directory.
955 * Returns 1 if the dirent should be cleared, otherwise 0.
957 static int check_encryption_policy(e2fsck_t ctx,
958 const struct ext2_dir_entry *dirent,
959 __u32 dir_encpolicy_id,
960 struct problem_context *pctx)
962 __u32 file_encpolicy_id = find_encryption_policy(ctx, dirent->inode);
964 /* Same policy or both UNRECOGNIZED_ENCRYPTION_POLICY? */
965 if (file_encpolicy_id == dir_encpolicy_id)
968 if (file_encpolicy_id == NO_ENCRYPTION_POLICY) {
969 if (!needs_encryption(ctx, dirent))
971 return fix_problem(ctx, PR_2_UNENCRYPTED_FILE, pctx);
974 return fix_problem(ctx, PR_2_INCONSISTENT_ENCRYPTION_POLICY, pctx);
978 * Check an encrypted directory entry.
980 * Returns 1 if the dirent should be cleared, otherwise 0.
982 static int check_encrypted_dirent(e2fsck_t ctx,
983 const struct ext2_dir_entry *dirent,
984 __u32 dir_encpolicy_id,
985 struct problem_context *pctx)
987 if (encrypted_check_name(ctx, dirent, pctx))
989 if (check_encryption_policy(ctx, dirent, dir_encpolicy_id, pctx))
994 static int check_dir_block2(ext2_filsys fs,
995 struct ext2_db_entry2 *db,
999 struct check_dir_struct *cd = priv_data;
1001 if (cd->ra_entries && cd->list_offset >= cd->next_ra_off) {
1002 err = e2fsck_readahead_dblist(fs,
1003 E2FSCK_RA_DBLIST_IGNORE_BLOCKCNT,
1005 cd->list_offset + cd->ra_entries / 8,
1009 cd->next_ra_off = cd->list_offset + (cd->ra_entries * 7 / 8);
1012 err = check_dir_block(fs, db, priv_data);
1017 static int check_dir_block(ext2_filsys fs,
1018 struct ext2_db_entry2 *db,
1021 struct dx_dir_info *dx_dir;
1022 struct dx_dirblock_info *dx_db = 0;
1023 struct ext2_dir_entry *dirent, *prev, dot, dotdot;
1024 ext2_dirhash_t hash;
1025 unsigned int offset = 0;
1026 int dir_modified = 0;
1028 unsigned int rec_len;
1029 blk64_t block_nr = db->blk;
1030 ext2_ino_t ino = db->ino;
1031 ext2_ino_t subdir_parent;
1033 struct check_dir_struct *cd;
1037 struct ext2_dx_root_info *root;
1038 struct ext2_dx_countlimit *limit;
1039 static dict_t de_dict;
1040 struct problem_context pctx;
1043 int dx_csum_size = 0, de_csum_size = 0;
1044 int failed_csum = 0;
1046 size_t inline_data_size = 0;
1048 __u32 dir_encpolicy_id = NO_ENCRYPTION_POLICY;
1049 int hash_in_dirent = 0;
1051 size_t max_block_size;
1053 static char *eop_read_dirblock = NULL;
1056 cd = (struct check_dir_struct *) priv_data;
1057 ibuf = buf = cd->buf;
1060 /* We only want filename encoding verification on strict
1061 * mode or if explicitly requested by user. */
1062 if (ext2fs_test_inode_bitmap2(ctx->inode_casefold_map, ino) &&
1063 ((ctx->fs->super->s_encoding_flags & EXT4_ENC_STRICT_MODE_FL) ||
1064 (ctx->options & E2F_OPT_CHECK_ENCODING)))
1067 if (ctx->flags & E2F_FLAG_RUN_RETURN)
1068 return DIRENT_ABORT;
1070 if (ctx->progress && (ctx->progress)(ctx, 2, cd->count++, cd->max))
1071 return DIRENT_ABORT;
1073 if (ext2fs_has_feature_metadata_csum(fs->super)) {
1074 dx_csum_size = sizeof(struct ext2_dx_tail);
1075 de_csum_size = sizeof(struct ext2_dir_entry_tail);
1078 if (ext2fs_has_feature_filetype(fs->super))
1079 filetype = EXT2_FT_DIR << 8;
1082 * Make sure the inode is still in use (could have been
1083 * deleted in the duplicate/bad blocks pass.
1085 if (!(ext2fs_test_inode_bitmap2(ctx->inode_used_map, ino)))
1089 cd->pctx.blk = block_nr;
1090 cd->pctx.blkcount = db->blockcnt;
1092 cd->pctx.dirent = 0;
1095 if (ext2fs_has_feature_inline_data(fs->super)) {
1098 ec = ext2fs_inline_data_size(fs, ino, &inline_data_size);
1099 if (ec && ec != EXT2_ET_NO_INLINE_DATA)
1100 return DIRENT_ABORT;
1103 /* This will allow (at some point in the future) to punch out empty
1104 * directory blocks and reduce the space used by a directory that grows
1105 * very large and then the files are deleted. For now, all that is
1106 * needed is to avoid e2fsck filling in these holes as part of
1108 if (db->blk == 0 && ext2fs_has_feature_largedir(fs->super) &&
1109 !ext2fs_has_feature_inline_data(fs->super))
1112 if (db->blk == 0 && !inline_data_size) {
1113 if (allocate_dir_block(ctx, db, buf, &cd->pctx))
1123 if (ctx->dirs_to_hash &&
1124 ext2fs_u32_list_test(ctx->dirs_to_hash, ino))
1128 printf("In process_dir_block block %lu, #%d, inode %lu\n", block_nr,
1132 if (!eop_read_dirblock)
1133 eop_read_dirblock = (char *) _("reading directory block");
1134 ehandler_operation(eop_read_dirblock);
1135 if (inline_data_size) {
1136 memset(buf, 0, fs->blocksize - inline_data_size);
1137 cd->pctx.errcode = ext2fs_inline_data_get(fs, ino, 0, buf, 0);
1138 if (cd->pctx.errcode)
1139 goto inline_read_fail;
1140 #ifdef WORDS_BIGENDIAN
1142 goto skip_first_read_swab;
1143 *((__u32 *)buf) = ext2fs_le32_to_cpu(*((__u32 *)buf));
1144 cd->pctx.errcode = ext2fs_dirent_swab_in2(fs,
1145 buf + EXT4_INLINE_DATA_DOTDOT_SIZE,
1146 EXT4_MIN_INLINE_DATA_SIZE - EXT4_INLINE_DATA_DOTDOT_SIZE,
1148 if (cd->pctx.errcode)
1149 goto inline_read_fail;
1150 skip_first_read_swab:
1151 if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE ||
1153 goto inline_read_fail;
1154 cd->pctx.errcode = ext2fs_dirent_swab_in2(fs,
1155 buf + EXT4_MIN_INLINE_DATA_SIZE,
1156 inline_data_size - EXT4_MIN_INLINE_DATA_SIZE,
1160 cd->pctx.errcode = ext2fs_read_dir_block4(fs, block_nr,
1164 pctx.num = inline_data_size;
1165 if (((inline_data_size & 3) ||
1166 (inline_data_size > EXT4_MIN_INLINE_DATA_SIZE &&
1167 inline_data_size < EXT4_MIN_INLINE_DATA_SIZE +
1168 EXT2_DIR_REC_LEN(1))) &&
1169 fix_problem(ctx, PR_2_BAD_INLINE_DIR_SIZE, &pctx)) {
1170 errcode_t err = fix_inline_dir_size(ctx, ino,
1171 &inline_data_size, &pctx,
1174 return DIRENT_ABORT;
1177 ehandler_operation(0);
1178 if (cd->pctx.errcode == EXT2_ET_DIR_CORRUPTED)
1179 cd->pctx.errcode = 0; /* We'll handle this ourselves */
1180 else if (cd->pctx.errcode == EXT2_ET_DIR_CSUM_INVALID) {
1181 cd->pctx.errcode = 0; /* We'll handle this ourselves */
1184 if (cd->pctx.errcode) {
1186 if (!fix_problem(ctx, PR_2_READ_DIRBLOCK, &cd->pctx)) {
1187 ctx->flags |= E2F_FLAG_ABORT;
1188 return DIRENT_ABORT;
1190 ext2fs_new_dir_block(fs, db->blockcnt == 0 ? ino : 0,
1191 EXT2_ROOT_INO, &buf2);
1192 memcpy(buf, buf2, fs->blocksize);
1193 ext2fs_free_mem(&buf2);
1195 dx_dir = e2fsck_get_dx_dir_info(ctx, ino);
1196 if (dx_dir && dx_dir->numblocks) {
1197 if (db->blockcnt >= dx_dir->numblocks) {
1199 if (fix_problem(ctx, PR_2_UNEXPECTED_HTREE_BLOCK,
1201 clear_htree(ctx, ino);
1202 dx_dir->numblocks = 0;
1206 fatal_error(ctx, _("Can not continue."));
1208 dx_db = &dx_dir->dx_block[db->blockcnt];
1209 dx_db->type = DX_DIRBLOCK_LEAF;
1210 dx_db->phys = block_nr;
1211 dx_db->min_hash = ~0;
1212 dx_db->max_hash = 0;
1214 dirent = (struct ext2_dir_entry *) buf;
1215 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1216 limit = (struct ext2_dx_countlimit *) (buf+8);
1217 if (db->blockcnt == 0) {
1218 root = (struct ext2_dx_root_info *) (buf + 24);
1219 dx_db->type = DX_DIRBLOCK_ROOT;
1220 dx_db->flags |= DX_FLAG_FIRST | DX_FLAG_LAST;
1222 /* large_dir was set in pass1 if large dirs were found,
1223 * so ext2_dir_htree_level() should now be correct */
1224 if ((root->reserved_zero ||
1225 root->info_length < 8 ||
1226 root->indirect_levels >=
1227 ext2_dir_htree_level(fs)) &&
1228 fix_problem(ctx, PR_2_HTREE_BAD_ROOT, &cd->pctx)) {
1229 clear_htree(ctx, ino);
1230 dx_dir->numblocks = 0;
1233 dx_dir->hashversion = root->hash_version;
1234 if ((dx_dir->hashversion <= EXT2_HASH_TEA) &&
1235 (fs->super->s_flags & EXT2_FLAGS_UNSIGNED_HASH))
1236 dx_dir->hashversion += 3;
1237 dx_dir->depth = root->indirect_levels + 1;
1238 } else if ((dirent->inode == 0) &&
1239 (rec_len == fs->blocksize) &&
1240 (ext2fs_dirent_name_len(dirent) == 0) &&
1241 (ext2fs_le16_to_cpu(limit->limit) ==
1242 ((fs->blocksize - (8 + dx_csum_size)) /
1243 sizeof(struct ext2_dx_entry)))) {
1244 dx_db->type = DX_DIRBLOCK_NODE;
1246 is_leaf = dx_db ? (dx_db->type == DX_DIRBLOCK_LEAF) : 0;
1250 /* Leaf node with no space for csum? Rebuild dirs in pass 3A. */
1251 if (is_leaf && !inline_data_size && failed_csum &&
1252 !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
1254 if (e2fsck_dir_will_be_rehashed(ctx, ino)) {
1258 if (!fix_problem(cd->ctx, PR_2_LEAF_NODE_MISSING_CSUM,
1261 e2fsck_rehash_dir_later(ctx, ino);
1265 /* htree nodes don't use fake dirents to store checksums */
1270 if (inline_data_size) {
1272 buf += EXT4_MIN_INLINE_DATA_SIZE;
1273 max_block_size = inline_data_size - EXT4_MIN_INLINE_DATA_SIZE;
1274 /* Zero-length second block, just exit */
1275 if (max_block_size == 0)
1278 max_block_size = EXT4_MIN_INLINE_DATA_SIZE;
1281 max_block_size = fs->blocksize - de_csum_size;
1283 dir_encpolicy_id = find_encryption_policy(ctx, ino);
1286 dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cf_cmp);
1287 dict_set_cmp_context(&de_dict, (void *)ctx->fs->encoding);
1289 dict_init(&de_dict, DICTCOUNT_T_MAX, dict_de_cmp);
1291 if (ctx->casefolded_dirs)
1292 casefolded = ext2fs_u32_list_test(ctx->casefolded_dirs, ino);
1293 hash_in_dirent = (casefolded &&
1294 (dir_encpolicy_id != NO_ENCRYPTION_POLICY));
1299 ext2_ino_t first_unused_inode;
1300 unsigned int name_len;
1301 /* csum entry is not checked here, so don't worry about it */
1302 int extended = (dot_state > 1) && hash_in_dirent;
1303 int min_dir_len = ext2fs_dir_rec_len(1, extended);
1306 if (!inline_data_size || dot_state > 1) {
1307 dirent = (struct ext2_dir_entry *) (buf + offset);
1309 * If there's not even space for the entry header,
1310 * force salvaging this dir.
1312 if (max_block_size - offset < EXT2_DIR_ENTRY_HEADER_LEN)
1313 rec_len = ext2fs_dir_rec_len(1, extended);
1315 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1316 cd->pctx.dirent = dirent;
1317 cd->pctx.num = offset;
1318 if ((offset + rec_len > max_block_size) ||
1319 (rec_len < min_dir_len) ||
1320 ((rec_len % 4) != 0) ||
1321 ((ext2fs_dir_rec_len(ext2fs_dirent_name_len(dirent),
1322 extended)) > rec_len)) {
1323 if (fix_problem(ctx, PR_2_DIR_CORRUPTED,
1325 #ifdef WORDS_BIGENDIAN
1327 * On big-endian systems, if the dirent
1328 * swap routine finds a rec_len that it
1329 * doesn't like, it continues
1330 * processing the block as if rec_len
1331 * == EXT2_DIR_ENTRY_HEADER_LEN. This means that the name
1332 * field gets byte swapped, which means
1333 * that salvage will not detect the
1334 * correct name length (unless the name
1335 * has a length that's an exact
1336 * multiple of four bytes), and it'll
1337 * discard the entry (unnecessarily)
1338 * and the rest of the dirent block.
1339 * Therefore, swap the rest of the
1340 * block back to disk order, run
1341 * salvage, and re-swap anything after
1342 * the salvaged dirent.
1344 int need_reswab = 0;
1345 if (rec_len < EXT2_DIR_ENTRY_HEADER_LEN || rec_len % 4) {
1347 ext2fs_dirent_swab_in2(fs,
1348 ((char *)dirent) + EXT2_DIR_ENTRY_HEADER_LEN,
1349 max_block_size - offset - EXT2_DIR_ENTRY_HEADER_LEN,
1353 salvage_directory(fs, dirent, prev,
1357 #ifdef WORDS_BIGENDIAN
1359 (void) ext2fs_get_rec_len(fs,
1361 ext2fs_dirent_swab_in2(fs,
1362 ((char *)dirent) + offset + rec_len,
1363 max_block_size - offset - rec_len,
1370 goto abort_free_dict;
1373 if (dot_state == 0) {
1374 memset(&dot, 0, sizeof(dot));
1376 dirent->inode = ino;
1377 dirent->rec_len = EXT2_DIR_REC_LEN(1);
1378 dirent->name_len = 1 | filetype;
1379 dirent->name[0] = '.';
1380 } else if (dot_state == 1) {
1381 memset(&dotdot, 0, sizeof(dotdot));
1384 ((struct ext2_dir_entry *)buf)->inode;
1385 dirent->rec_len = EXT2_DIR_REC_LEN(2);
1386 dirent->name_len = 2 | filetype;
1387 dirent->name[0] = '.';
1388 dirent->name[1] = '.';
1390 fatal_error(ctx, _("Can not continue."));
1392 cd->pctx.dirent = dirent;
1393 cd->pctx.num = offset;
1396 if (dot_state == 0) {
1397 if (check_dot(ctx, dirent, ino, &cd->pctx))
1399 } else if (dot_state == 1) {
1400 ret = check_dotdot(ctx, dirent, ino, &cd->pctx);
1402 goto abort_free_dict;
1405 } else if (dirent->inode == ino) {
1406 problem = PR_2_LINK_DOT;
1407 if (fix_problem(ctx, PR_2_LINK_DOT, &cd->pctx)) {
1417 * Make sure the inode listed is a legal one.
1419 name_len = ext2fs_dirent_name_len(dirent);
1420 if (((dirent->inode != EXT2_ROOT_INO) &&
1421 (dirent->inode < EXT2_FIRST_INODE(fs->super))) ||
1422 (dirent->inode > fs->super->s_inodes_count)) {
1423 problem = PR_2_BAD_INO;
1424 } else if (ctx->inode_bb_map &&
1425 (ext2fs_test_inode_bitmap2(ctx->inode_bb_map,
1428 * If the inode is in a bad block, offer to
1431 problem = PR_2_BB_INODE;
1432 } else if ((dot_state > 1) && (name_len == 1) &&
1433 (dirent->name[0] == '.')) {
1435 * If there's a '.' entry in anything other
1436 * than the first directory entry, it's a
1437 * duplicate entry that should be removed.
1439 problem = PR_2_DUP_DOT;
1440 } else if ((dot_state > 1) && (name_len == 2) &&
1441 (dirent->name[0] == '.') &&
1442 (dirent->name[1] == '.')) {
1444 * If there's a '..' entry in anything other
1445 * than the second directory entry, it's a
1446 * duplicate entry that should be removed.
1448 problem = PR_2_DUP_DOT_DOT;
1449 } else if ((dot_state > 1) &&
1450 (dirent->inode == EXT2_ROOT_INO)) {
1452 * Don't allow links to the root directory.
1453 * We check this specially to make sure we
1454 * catch this error case even if the root
1455 * directory hasn't been created yet.
1457 problem = PR_2_LINK_ROOT;
1458 } else if ((dot_state > 1) && (name_len == 0)) {
1460 * Don't allow zero-length directory names.
1462 problem = PR_2_NULL_NAME;
1466 if (fix_problem(ctx, problem, &cd->pctx)) {
1471 ext2fs_unmark_valid(fs);
1472 if (problem == PR_2_BAD_INO)
1478 * If the inode was marked as having bad fields in
1479 * pass1, process it and offer to fix/clear it.
1480 * (We wait until now so that we can display the
1481 * pathname to the user.)
1483 if (ctx->inode_bad_map &&
1484 ext2fs_test_inode_bitmap2(ctx->inode_bad_map,
1486 if (e2fsck_process_bad_inode(ctx, ino,
1488 buf + fs->blocksize)) {
1493 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1494 return DIRENT_ABORT;
1497 group = ext2fs_group_of_ino(fs, dirent->inode);
1498 first_unused_inode = group * fs->super->s_inodes_per_group +
1499 1 + fs->super->s_inodes_per_group -
1500 ext2fs_bg_itable_unused(fs, group);
1501 cd->pctx.group = group;
1504 * Check if the inode was missed out because
1505 * _INODE_UNINIT flag was set or bg_itable_unused was
1506 * incorrect. If so, clear the _INODE_UNINIT flag and
1507 * restart e2fsck. In the future it would be nice if
1508 * we could call a function in pass1.c that checks the
1509 * newly visible inodes.
1511 if (ext2fs_bg_flags_test(fs, group, EXT2_BG_INODE_UNINIT)) {
1512 pctx.num = dirent->inode;
1513 if (fix_problem(ctx, PR_2_INOREF_BG_INO_UNINIT,
1515 ext2fs_bg_flags_clear(fs, group,
1516 EXT2_BG_INODE_UNINIT);
1517 ext2fs_mark_super_dirty(fs);
1518 ctx->flags |= E2F_FLAG_RESTART_LATER;
1520 ext2fs_unmark_valid(fs);
1521 if (problem == PR_2_BAD_INO)
1524 } else if (dirent->inode >= first_unused_inode) {
1525 pctx.num = dirent->inode;
1526 if (fix_problem(ctx, PR_2_INOREF_IN_UNUSED, &cd->pctx)){
1527 ext2fs_bg_itable_unused_set(fs, group, 0);
1528 ext2fs_mark_super_dirty(fs);
1529 ctx->flags |= E2F_FLAG_RESTART_LATER;
1531 ext2fs_unmark_valid(fs);
1532 if (problem == PR_2_BAD_INO)
1538 * Offer to clear unused inodes; if we are going to be
1539 * restarting the scan due to bg_itable_unused being
1540 * wrong, then don't clear any inodes to avoid zapping
1541 * inodes that were skipped during pass1 due to an
1542 * incorrect bg_itable_unused; we'll get any real
1543 * problems after we restart.
1545 if (!(ctx->flags & E2F_FLAG_RESTART_LATER) &&
1546 !(ext2fs_test_inode_bitmap2(ctx->inode_used_map,
1548 problem = PR_2_UNUSED_INODE;
1551 if (fix_problem(ctx, problem, &cd->pctx)) {
1556 ext2fs_unmark_valid(fs);
1557 if (problem == PR_2_BAD_INO)
1562 if (check_filetype(ctx, dirent, ino, &cd->pctx))
1565 if (dir_encpolicy_id != NO_ENCRYPTION_POLICY) {
1566 /* Encrypted directory */
1567 if (dot_state > 1 &&
1568 check_encrypted_dirent(ctx, dirent,
1575 } else if (cf_dir) {
1576 /* Casefolded directory */
1577 if (encoded_check_name(ctx, dirent, &cd->pctx))
1580 /* Unencrypted and uncasefolded directory */
1581 if (check_name(ctx, dirent, &cd->pctx))
1586 if (dx_dir->casefolded_hash)
1587 hash_flags = EXT4_CASEFOLD_FL;
1589 if (dx_dir->hashversion == EXT2_HASH_SIPHASH) {
1591 hash = EXT2_DIRENT_HASH(dirent);
1593 ext2fs_dirhash2(dx_dir->hashversion,
1595 ext2fs_dirent_name_len(dirent),
1596 fs->encoding, hash_flags,
1597 fs->super->s_hash_seed,
1600 if (hash < dx_db->min_hash)
1601 dx_db->min_hash = hash;
1602 if (hash > dx_db->max_hash)
1603 dx_db->max_hash = hash;
1607 * If this is a directory, then mark its parent in its
1608 * dir_info structure. If the parent field is already
1609 * filled in, then this directory has more than one
1610 * hard link. We assume the first link is correct,
1611 * and ask the user if he/she wants to clear this one.
1613 if ((dot_state > 1) &&
1614 (ext2fs_test_inode_bitmap2(ctx->inode_dir_map,
1616 if (e2fsck_dir_info_get_parent(ctx, dirent->inode,
1618 cd->pctx.ino = dirent->inode;
1619 fix_problem(ctx, PR_2_NO_DIRINFO, &cd->pctx);
1620 goto abort_free_dict;
1622 if (subdir_parent) {
1623 cd->pctx.ino2 = subdir_parent;
1624 if (fix_problem(ctx, PR_2_LINK_DIR,
1632 (void) e2fsck_dir_info_set_parent(ctx,
1633 dirent->inode, ino);
1639 } else if (dict_lookup(&de_dict, dirent)) {
1640 clear_problem_context(&pctx);
1642 pctx.dirent = dirent;
1643 fix_problem(ctx, PR_2_REPORT_DUP_DIRENT, &pctx);
1644 e2fsck_rehash_dir_later(ctx, ino);
1647 dict_alloc_insert(&de_dict, dirent, dirent);
1649 ext2fs_icount_increment(ctx->inode_count, dirent->inode,
1652 ctx->fs_links_count++;
1653 ctx->fs_total_count++;
1657 (void) ext2fs_get_rec_len(fs, dirent, &rec_len);
1658 if (!inline_data_size || dot_state > 1) {
1661 if (dot_state == 1) {
1664 * If we get here, we're checking an inline
1665 * directory and we've just checked a (fake)
1666 * dotdot entry that we created on the stack.
1667 * Therefore set 'prev' to NULL so that if we
1668 * call salvage_directory on the next entry,
1669 * it won't try to absorb the next entry into
1670 * the on-stack dotdot entry.
1676 } while (offset < max_block_size);
1682 printf("db_block %d, type %d, min_hash 0x%0x, max_hash 0x%0x\n",
1683 db->blockcnt, dx_db->type,
1684 dx_db->min_hash, dx_db->max_hash);
1686 cd->pctx.dir = cd->pctx.ino;
1687 if ((dx_db->type == DX_DIRBLOCK_ROOT) ||
1688 (dx_db->type == DX_DIRBLOCK_NODE))
1689 parse_int_node(fs, db, cd, dx_dir, buf, failed_csum);
1692 if (offset != max_block_size) {
1693 cd->pctx.num = rec_len + offset - max_block_size;
1694 if (fix_problem(ctx, PR_2_FINAL_RECLEN, &cd->pctx)) {
1695 dirent->rec_len = cd->pctx.num;
1700 int flags, will_rehash;
1701 /* leaf block with no tail? Rehash dirs later. */
1702 if (ext2fs_has_feature_metadata_csum(fs->super) &&
1704 !inline_data_size &&
1705 !ext2fs_dirent_has_tail(fs, (struct ext2_dir_entry *)buf)) {
1706 if (insert_dirent_tail(fs, buf) == 0)
1708 e2fsck_rehash_dir_later(ctx, ino);
1712 will_rehash = e2fsck_dir_will_be_rehashed(ctx, ino);
1714 flags = ctx->fs->flags;
1715 ctx->fs->flags |= EXT2_FLAG_IGNORE_CSUM_ERRORS;
1717 if (inline_data_size) {
1719 #ifdef WORDS_BIGENDIAN
1721 goto skip_first_write_swab;
1722 *((__u32 *)buf) = ext2fs_le32_to_cpu(*((__u32 *)buf));
1723 cd->pctx.errcode = ext2fs_dirent_swab_out2(fs,
1724 buf + EXT4_INLINE_DATA_DOTDOT_SIZE,
1725 EXT4_MIN_INLINE_DATA_SIZE -
1726 EXT4_INLINE_DATA_DOTDOT_SIZE,
1728 if (cd->pctx.errcode)
1729 goto skip_second_write_swab;
1730 skip_first_write_swab:
1731 if (inline_data_size <= EXT4_MIN_INLINE_DATA_SIZE ||
1733 goto skip_second_write_swab;
1734 cd->pctx.errcode = ext2fs_dirent_swab_out2(fs,
1735 buf + EXT4_MIN_INLINE_DATA_SIZE,
1737 EXT4_MIN_INLINE_DATA_SIZE,
1739 skip_second_write_swab:
1740 if (cd->pctx.errcode &&
1741 !fix_problem(ctx, PR_2_WRITE_DIRBLOCK, &cd->pctx))
1742 goto abort_free_dict;
1745 ext2fs_inline_data_set(fs, ino, 0, buf,
1748 cd->pctx.errcode = ext2fs_write_dir_block4(fs, block_nr,
1751 ctx->fs->flags = (flags &
1752 EXT2_FLAG_IGNORE_CSUM_ERRORS) |
1754 ~EXT2_FLAG_IGNORE_CSUM_ERRORS);
1755 if (cd->pctx.errcode) {
1756 if (!fix_problem(ctx, PR_2_WRITE_DIRBLOCK,
1758 goto abort_free_dict;
1760 ext2fs_mark_changed(fs);
1761 } else if (is_leaf && failed_csum && !dir_modified) {
1763 * If a leaf node that fails csum makes it this far without
1764 * alteration, ask the user if the checksum should be fixed.
1766 if (fix_problem(ctx, PR_2_LEAF_NODE_ONLY_CSUM_INVALID,
1770 dict_free_nodes(&de_dict);
1773 ctx->flags |= E2F_FLAG_ABORT;
1774 dict_free_nodes(&de_dict);
1775 return DIRENT_ABORT;
1781 blk64_t last_cluster;
1785 * This function is called to deallocate a block, and is an interator
1786 * functioned called by deallocate inode via ext2fs_iterate_block().
1788 static int deallocate_inode_block(ext2_filsys fs,
1790 e2_blkcnt_t blockcnt EXT2FS_ATTR((unused)),
1791 blk64_t ref_block EXT2FS_ATTR((unused)),
1792 int ref_offset EXT2FS_ATTR((unused)),
1795 struct del_block *p = priv_data;
1796 blk64_t cluster = EXT2FS_B2C(fs, *block_nr);
1801 if (cluster == p->last_cluster)
1804 p->last_cluster = cluster;
1805 if ((*block_nr < fs->super->s_first_data_block) ||
1806 (*block_nr >= ext2fs_blocks_count(fs->super)))
1809 ext2fs_block_alloc_stats2(fs, *block_nr, -1);
1815 * This function deallocates an inode
1817 static void deallocate_inode(e2fsck_t ctx, ext2_ino_t ino, char* block_buf)
1819 ext2_filsys fs = ctx->fs;
1820 struct ext2_inode inode;
1821 struct problem_context pctx;
1823 struct del_block del_block;
1825 e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
1826 clear_problem_context(&pctx);
1830 * Fix up the bitmaps...
1832 e2fsck_read_bitmaps(ctx);
1833 ext2fs_inode_alloc_stats2(fs, ino, -1, LINUX_S_ISDIR(inode.i_mode));
1835 if (ext2fs_file_acl_block(fs, &inode) &&
1836 ext2fs_has_feature_xattr(fs->super)) {
1837 pctx.errcode = ext2fs_adjust_ea_refcount3(fs,
1838 ext2fs_file_acl_block(fs, &inode),
1839 block_buf, -1, &count, ino);
1840 if (pctx.errcode == EXT2_ET_BAD_EA_BLOCK_NUM) {
1845 pctx.blk = ext2fs_file_acl_block(fs, &inode);
1846 fix_problem(ctx, PR_2_ADJ_EA_REFCOUNT, &pctx);
1847 ctx->flags |= E2F_FLAG_ABORT;
1851 ext2fs_block_alloc_stats2(fs,
1852 ext2fs_file_acl_block(fs, &inode), -1);
1854 ext2fs_file_acl_block_set(fs, &inode, 0);
1857 if (!ext2fs_inode_has_valid_blocks2(fs, &inode))
1860 /* Inline data inodes don't have blocks to iterate */
1861 if (inode.i_flags & EXT4_INLINE_DATA_FL)
1864 if (ext2fs_needs_large_file_feature(EXT2_I_SIZE(&inode))) {
1865 if (LINUX_S_ISREG(inode.i_mode))
1867 else if (LINUX_S_ISDIR(inode.i_mode))
1871 del_block.ctx = ctx;
1873 del_block.last_cluster = 0;
1874 pctx.errcode = ext2fs_block_iterate3(fs, ino, 0, block_buf,
1875 deallocate_inode_block,
1878 fix_problem(ctx, PR_2_DEALLOC_INODE, &pctx);
1879 ctx->flags |= E2F_FLAG_ABORT;
1883 /* Inode may have changed by block_iterate, so reread it */
1884 e2fsck_read_inode(ctx, ino, &inode, "deallocate_inode");
1885 e2fsck_clear_inode(ctx, ino, &inode, 0, "deallocate_inode");
1889 * This function clears the htree flag on an inode
1891 static void clear_htree(e2fsck_t ctx, ext2_ino_t ino)
1893 struct ext2_inode inode;
1895 e2fsck_read_inode(ctx, ino, &inode, "clear_htree");
1896 inode.i_flags = inode.i_flags & ~EXT2_INDEX_FL;
1897 e2fsck_write_inode(ctx, ino, &inode, "clear_htree");
1898 if (ctx->dirs_to_hash)
1899 ext2fs_u32_list_add(ctx->dirs_to_hash, ino);
1903 int e2fsck_process_bad_inode(e2fsck_t ctx, ext2_ino_t dir,
1904 ext2_ino_t ino, char *buf)
1906 ext2_filsys fs = ctx->fs;
1907 struct ext2_inode inode;
1908 int inode_modified = 0;
1910 unsigned char *frag, *fsize;
1911 struct problem_context pctx;
1912 problem_t problem = 0;
1914 e2fsck_read_inode(ctx, ino, &inode, "process_bad_inode");
1916 clear_problem_context(&pctx);
1919 pctx.inode = &inode;
1921 if (ext2fs_file_acl_block(fs, &inode) &&
1922 !ext2fs_has_feature_xattr(fs->super)) {
1923 if (fix_problem(ctx, PR_2_FILE_ACL_ZERO, &pctx)) {
1924 ext2fs_file_acl_block_set(fs, &inode, 0);
1930 if (!LINUX_S_ISDIR(inode.i_mode) && !LINUX_S_ISREG(inode.i_mode) &&
1931 !LINUX_S_ISCHR(inode.i_mode) && !LINUX_S_ISBLK(inode.i_mode) &&
1932 !LINUX_S_ISLNK(inode.i_mode) && !LINUX_S_ISFIFO(inode.i_mode) &&
1933 !(LINUX_S_ISSOCK(inode.i_mode)))
1934 problem = PR_2_BAD_MODE;
1935 else if (LINUX_S_ISCHR(inode.i_mode)
1936 && !e2fsck_pass1_check_device_inode(fs, &inode))
1937 problem = PR_2_BAD_CHAR_DEV;
1938 else if (LINUX_S_ISBLK(inode.i_mode)
1939 && !e2fsck_pass1_check_device_inode(fs, &inode))
1940 problem = PR_2_BAD_BLOCK_DEV;
1941 else if (LINUX_S_ISFIFO(inode.i_mode)
1942 && !e2fsck_pass1_check_device_inode(fs, &inode))
1943 problem = PR_2_BAD_FIFO;
1944 else if (LINUX_S_ISSOCK(inode.i_mode)
1945 && !e2fsck_pass1_check_device_inode(fs, &inode))
1946 problem = PR_2_BAD_SOCKET;
1947 else if (LINUX_S_ISLNK(inode.i_mode)
1948 && !e2fsck_pass1_check_symlink(fs, ino, &inode, buf)) {
1949 problem = PR_2_INVALID_SYMLINK;
1953 if (fix_problem(ctx, problem, &pctx)) {
1954 deallocate_inode(ctx, ino, 0);
1955 if (ctx->flags & E2F_FLAG_SIGNAL_MASK)
1963 if (inode.i_faddr) {
1964 if (fix_problem(ctx, PR_2_FADDR_ZERO, &pctx)) {
1971 switch (fs->super->s_creator_os) {
1973 frag = &inode.osd2.hurd2.h_i_frag;
1974 fsize = &inode.osd2.hurd2.h_i_fsize;
1979 if (frag && *frag) {
1981 if (fix_problem(ctx, PR_2_FRAG_ZERO, &pctx)) {
1988 if (fsize && *fsize) {
1990 if (fix_problem(ctx, PR_2_FSIZE_ZERO, &pctx)) {
1998 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
1999 !ext2fs_has_feature_huge_file(fs->super) &&
2000 (inode.osd2.linux2.l_i_blocks_hi != 0)) {
2001 pctx.num = inode.osd2.linux2.l_i_blocks_hi;
2002 if (fix_problem(ctx, PR_2_BLOCKS_HI_ZERO, &pctx)) {
2003 inode.osd2.linux2.l_i_blocks_hi = 0;
2008 if ((fs->super->s_creator_os == EXT2_OS_LINUX) &&
2009 !ext2fs_has_feature_64bit(fs->super) &&
2010 inode.osd2.linux2.l_i_file_acl_high != 0) {
2011 pctx.num = inode.osd2.linux2.l_i_file_acl_high;
2012 if (fix_problem(ctx, PR_2_I_FILE_ACL_HI_ZERO, &pctx)) {
2013 inode.osd2.linux2.l_i_file_acl_high = 0;
2019 if (ext2fs_file_acl_block(fs, &inode) &&
2020 ((ext2fs_file_acl_block(fs, &inode) < fs->super->s_first_data_block) ||
2021 (ext2fs_file_acl_block(fs, &inode) >= ext2fs_blocks_count(fs->super)))) {
2022 if (fix_problem(ctx, PR_2_FILE_ACL_BAD, &pctx)) {
2023 ext2fs_file_acl_block_set(fs, &inode, 0);
2028 if (inode.i_size_high && !ext2fs_has_feature_largedir(fs->super) &&
2029 inode.i_blocks < 1ULL << (29 - EXT2_BLOCK_SIZE_BITS(fs->super)) &&
2030 LINUX_S_ISDIR(inode.i_mode)) {
2031 if (fix_problem(ctx, PR_2_DIR_SIZE_HIGH_ZERO, &pctx)) {
2032 inode.i_size_high = 0;
2039 e2fsck_write_inode(ctx, ino, &inode, "process_bad_inode");
2040 if (!not_fixed && ctx->inode_bad_map)
2041 ext2fs_unmark_inode_bitmap2(ctx->inode_bad_map, ino);
2046 * allocate_dir_block --- this function allocates a new directory
2047 * block for a particular inode; this is done if a directory has
2048 * a "hole" in it, or if a directory has a illegal block number
2049 * that was zeroed out and now needs to be replaced.
2051 static int allocate_dir_block(e2fsck_t ctx,
2052 struct ext2_db_entry2 *db,
2053 char *buf EXT2FS_ATTR((unused)),
2054 struct problem_context *pctx)
2056 ext2_filsys fs = ctx->fs;
2059 struct ext2_inode inode;
2061 if (fix_problem(ctx, PR_2_DIRECTORY_HOLE, pctx) == 0)
2065 * Read the inode and block bitmaps in; we'll be messing with
2068 e2fsck_read_bitmaps(ctx);
2071 * First, find a free block
2073 e2fsck_read_inode(ctx, db->ino, &inode, "allocate_dir_block");
2074 pctx->errcode = ext2fs_map_cluster_block(fs, db->ino, &inode,
2075 db->blockcnt, &blk);
2076 if (pctx->errcode || blk == 0) {
2077 blk = ext2fs_find_inode_goal(fs, db->ino, &inode, db->blockcnt);
2078 pctx->errcode = ext2fs_new_block2(fs, blk,
2079 ctx->block_found_map, &blk);
2080 if (pctx->errcode) {
2081 pctx->str = "ext2fs_new_block";
2082 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2086 ext2fs_mark_block_bitmap2(ctx->block_found_map, blk);
2087 ext2fs_mark_block_bitmap2(fs->block_map, blk);
2088 ext2fs_mark_bb_dirty(fs);
2091 * Now let's create the actual data block for the inode
2094 pctx->errcode = ext2fs_new_dir_block(fs, 0, 0, &block);
2096 pctx->errcode = ext2fs_new_dir_block(fs, db->ino,
2097 EXT2_ROOT_INO, &block);
2099 if (pctx->errcode) {
2100 pctx->str = "ext2fs_new_dir_block";
2101 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2105 pctx->errcode = ext2fs_write_dir_block4(fs, blk, block, 0, db->ino);
2106 ext2fs_free_mem(&block);
2107 if (pctx->errcode) {
2108 pctx->str = "ext2fs_write_dir_block";
2109 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2114 * Update the inode block count
2116 ext2fs_iblk_add_blocks(fs, &inode, 1);
2117 if (EXT2_I_SIZE(&inode) < ((__u64) db->blockcnt+1) * fs->blocksize) {
2118 pctx->errcode = ext2fs_inode_size_set(fs, &inode,
2119 (db->blockcnt+1) * fs->blocksize);
2120 if (pctx->errcode) {
2121 pctx->str = "ext2fs_inode_size_set";
2122 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);
2126 e2fsck_write_inode(ctx, db->ino, &inode, "allocate_dir_block");
2129 * Finally, update the block pointers for the inode
2132 pctx->errcode = ext2fs_bmap2(fs, db->ino, &inode, 0, BMAP_SET,
2133 db->blockcnt, 0, &blk);
2134 if (pctx->errcode) {
2135 pctx->str = "ext2fs_block_iterate";
2136 fix_problem(ctx, PR_2_ALLOC_DIRBOCK, pctx);