2 * rehash.c --- rebuild hash tree directories
4 * Copyright (C) 2002 Theodore Ts'o
7 * This file may be redistributed under the terms of the GNU Public
11 * This algorithm is designed for simplicity of implementation and to
12 * pack the directory as much as possible. It however requires twice
13 * as much memory as the size of the directory. The maximum size
14 * directory supported using a 4k blocksize is roughly a gigabyte, and
15 * so there may very well be problems with machines that don't have
16 * virtual memory, and obscenely large directories.
18 * An alternate algorithm which is much more disk intensive could be
19 * written, and probably will need to be written in the future. The
20 * design goals of such an algorithm are: (a) use (roughly) constant
21 * amounts of memory, no matter how large the directory, (b) the
22 * directory must be safe at all times, even if e2fsck is interrupted
23 * in the middle, (c) we must use minimal amounts of extra disk
24 * blocks. This pretty much requires an incremental approach, where
25 * we are reading from one part of the directory, and inserting into
26 * the front half. So the algorithm will have to keep track of a
27 * moving block boundary between the new tree and the old tree, and
28 * files will need to be moved from the old directory and inserted
29 * into the new tree. If the new directory requires space which isn't
30 * yet available, blocks from the beginning part of the old directory
31 * may need to be moved to the end of the directory to make room for
34 * --------------------------------------------------------
35 * | new tree | | old tree |
36 * --------------------------------------------------------
40 * This is going to be a pain in the tuckus to implement, and will
41 * require a lot more disk accesses. So I'm going to skip it for now;
42 * it's only really going to be an issue for really, really big
43 * filesystems (when we reach the level of tens of millions of files
44 * in a single directory). It will probably be easier to simply
45 * require that e2fsck use VM first.
55 /* Schedule a dir to be rebuilt during pass 3A. */
56 void e2fsck_rehash_dir_later(e2fsck_t ctx
, ext2_ino_t ino
)
58 if (!ctx
->dirs_to_hash
)
59 ext2fs_u32_list_create(&ctx
->dirs_to_hash
, 50);
60 if (ctx
->dirs_to_hash
)
61 ext2fs_u32_list_add(ctx
->dirs_to_hash
, ino
);
64 /* Ask if a dir will be rebuilt during pass 3A. */
65 int e2fsck_dir_will_be_rehashed(e2fsck_t ctx
, ext2_ino_t ino
)
67 if (ctx
->options
& E2F_OPT_COMPRESS_DIRS
)
69 if (!ctx
->dirs_to_hash
)
71 return ext2fs_u32_list_test(ctx
->dirs_to_hash
, ino
);
74 struct fill_dir_struct
{
76 struct ext2_inode
*inode
;
79 struct hash_entry
*harray
;
80 int max_array
, num_array
;
81 unsigned int dir_size
;
89 ext2_dirhash_t minor_hash
;
91 struct ext2_dir_entry
*dir
;
98 ext2_dirhash_t
*hashes
;
101 static int fill_dir_block(ext2_filsys fs
,
103 e2_blkcnt_t blockcnt
,
104 blk64_t ref_block
EXT2FS_ATTR((unused
)),
105 int ref_offset
EXT2FS_ATTR((unused
)),
108 struct fill_dir_struct
*fd
= (struct fill_dir_struct
*) priv_data
;
109 struct hash_entry
*new_array
, *ent
;
110 struct ext2_dir_entry
*dirent
;
112 unsigned int offset
, dir_offset
, rec_len
, name_len
;
118 offset
= blockcnt
* fs
->blocksize
;
119 if (offset
+ fs
->blocksize
> fd
->inode
->i_size
) {
120 fd
->err
= EXT2_ET_DIR_CORRUPTED
;
123 dir
= (fd
->buf
+offset
);
124 if (HOLE_BLKADDR(*block_nr
)) {
125 memset(dir
, 0, fs
->blocksize
);
126 dirent
= (struct ext2_dir_entry
*) dir
;
127 (void) ext2fs_set_rec_len(fs
, fs
->blocksize
, dirent
);
129 int flags
= fs
->flags
;
130 fs
->flags
|= EXT2_FLAG_IGNORE_CSUM_ERRORS
;
131 fd
->err
= ext2fs_read_dir_block4(fs
, *block_nr
, dir
, 0,
133 fs
->flags
= (flags
& EXT2_FLAG_IGNORE_CSUM_ERRORS
) |
134 (fs
->flags
& ~EXT2_FLAG_IGNORE_CSUM_ERRORS
);
138 hash_alg
= fs
->super
->s_def_hash_version
;
139 if ((hash_alg
<= EXT2_HASH_TEA
) &&
140 (fs
->super
->s_flags
& EXT2_FLAGS_UNSIGNED_HASH
))
142 /* While the directory block is "hot", index it. */
144 while (dir_offset
< fs
->blocksize
) {
145 dirent
= (struct ext2_dir_entry
*) (dir
+ dir_offset
);
146 (void) ext2fs_get_rec_len(fs
, dirent
, &rec_len
);
147 name_len
= ext2fs_dirent_name_len(dirent
);
148 if (((dir_offset
+ rec_len
) > fs
->blocksize
) ||
150 ((rec_len
% 4) != 0) ||
151 (name_len
+ 8 > rec_len
)) {
152 fd
->err
= EXT2_ET_DIR_CORRUPTED
;
155 dir_offset
+= rec_len
;
156 if (dirent
->inode
== 0)
158 if (!fd
->compress
&& (name_len
== 1) &&
159 (dirent
->name
[0] == '.'))
161 if (!fd
->compress
&& (name_len
== 2) &&
162 (dirent
->name
[0] == '.') && (dirent
->name
[1] == '.')) {
163 fd
->parent
= dirent
->inode
;
166 if (fd
->num_array
>= fd
->max_array
) {
167 new_array
= realloc(fd
->harray
,
168 sizeof(struct hash_entry
) * (fd
->max_array
+500));
173 fd
->harray
= new_array
;
174 fd
->max_array
+= 500;
176 ent
= fd
->harray
+ fd
->num_array
++;
178 fd
->dir_size
+= EXT2_DIR_REC_LEN(name_len
);
179 ent
->ino
= dirent
->inode
;
181 ent
->hash
= ent
->minor_hash
= 0;
183 fd
->err
= ext2fs_dirhash(hash_alg
, dirent
->name
,
185 fs
->super
->s_hash_seed
,
186 &ent
->hash
, &ent
->minor_hash
);
195 /* Used for sorting the hash entry */
196 static EXT2_QSORT_TYPE
ino_cmp(const void *a
, const void *b
)
198 const struct hash_entry
*he_a
= (const struct hash_entry
*) a
;
199 const struct hash_entry
*he_b
= (const struct hash_entry
*) b
;
201 return (he_a
->ino
- he_b
->ino
);
204 /* Used for sorting the hash entry */
205 static EXT2_QSORT_TYPE
name_cmp(const void *a
, const void *b
)
207 const struct hash_entry
*he_a
= (const struct hash_entry
*) a
;
208 const struct hash_entry
*he_b
= (const struct hash_entry
*) b
;
209 unsigned int he_a_len
, he_b_len
;
213 he_a_len
= ext2fs_dirent_name_len(he_a
->dir
);
214 he_b_len
= ext2fs_dirent_name_len(he_b
->dir
);
216 if (min_len
> he_b_len
)
219 ret
= strncmp(he_a
->dir
->name
, he_b
->dir
->name
, min_len
);
221 if (he_a_len
> he_b_len
)
223 else if (he_a_len
< he_b_len
)
226 ret
= he_b
->dir
->inode
- he_a
->dir
->inode
;
231 /* Used for sorting the hash entry */
232 static EXT2_QSORT_TYPE
hash_cmp(const void *a
, const void *b
)
234 const struct hash_entry
*he_a
= (const struct hash_entry
*) a
;
235 const struct hash_entry
*he_b
= (const struct hash_entry
*) b
;
238 if (he_a
->hash
> he_b
->hash
)
240 else if (he_a
->hash
< he_b
->hash
)
243 if (he_a
->minor_hash
> he_b
->minor_hash
)
245 else if (he_a
->minor_hash
< he_b
->minor_hash
)
248 ret
= name_cmp(a
, b
);
253 static errcode_t
alloc_size_dir(ext2_filsys fs
, struct out_dir
*outdir
,
259 new_mem
= realloc(outdir
->buf
, blocks
* fs
->blocksize
);
262 outdir
->buf
= new_mem
;
263 new_mem
= realloc(outdir
->hashes
,
264 blocks
* sizeof(ext2_dirhash_t
));
267 outdir
->hashes
= new_mem
;
269 outdir
->buf
= malloc(blocks
* fs
->blocksize
);
270 outdir
->hashes
= malloc(blocks
* sizeof(ext2_dirhash_t
));
273 outdir
->max
= blocks
;
277 static void free_out_dir(struct out_dir
*outdir
)
280 free(outdir
->hashes
);
285 static errcode_t
get_next_block(ext2_filsys fs
, struct out_dir
*outdir
,
290 if (outdir
->num
>= outdir
->max
) {
291 retval
= alloc_size_dir(fs
, outdir
, outdir
->max
+ 50);
295 *ret
= outdir
->buf
+ (outdir
->num
++ * fs
->blocksize
);
296 memset(*ret
, 0, fs
->blocksize
);
301 * This function is used to make a unique filename. We do this by
302 * appending ~0, and then incrementing the number. However, we cannot
303 * expand the length of the filename beyond the padding available in
304 * the directory entry.
306 static void mutate_name(char *str
, unsigned int *len
)
309 unsigned int l
= *len
;
312 * First check to see if it looks the name has been mutated
315 for (i
= l
-1; i
> 0; i
--) {
316 if (!isdigit(str
[i
]))
319 if ((i
== l
-1) || (str
[i
] != '~')) {
329 for (i
= l
-1; i
>= 0; i
--) {
330 if (isdigit(str
[i
])) {
342 else if (str
[0] == 'Z') {
360 static int duplicate_search_and_fix(e2fsck_t ctx
, ext2_filsys fs
,
362 struct fill_dir_struct
*fd
)
364 struct problem_context pctx
;
365 struct hash_entry
*ent
, *prev
;
369 unsigned int new_len
;
372 clear_problem_context(&pctx
);
375 hash_alg
= fs
->super
->s_def_hash_version
;
376 if ((hash_alg
<= EXT2_HASH_TEA
) &&
377 (fs
->super
->s_flags
& EXT2_FLAGS_UNSIGNED_HASH
))
380 for (i
=1; i
< fd
->num_array
; i
++) {
381 ent
= fd
->harray
+ i
;
383 if (!ent
->dir
->inode
||
384 (ext2fs_dirent_name_len(ent
->dir
) !=
385 ext2fs_dirent_name_len(prev
->dir
)) ||
386 strncmp(ent
->dir
->name
, prev
->dir
->name
,
387 ext2fs_dirent_name_len(ent
->dir
)))
389 pctx
.dirent
= ent
->dir
;
390 if ((ent
->dir
->inode
== prev
->dir
->inode
) &&
391 fix_problem(ctx
, PR_2_DUPLICATE_DIRENT
, &pctx
)) {
392 e2fsck_adjust_inode_count(ctx
, ent
->dir
->inode
, -1);
397 new_len
= ext2fs_dirent_name_len(ent
->dir
);
398 memcpy(new_name
, ent
->dir
->name
, new_len
);
399 mutate_name(new_name
, &new_len
);
400 for (j
=0; j
< fd
->num_array
; j
++) {
403 ext2fs_dirent_name_len(fd
->harray
[j
].dir
)) ||
404 strncmp(new_name
, fd
->harray
[j
].dir
->name
, new_len
))
406 mutate_name(new_name
, &new_len
);
410 new_name
[new_len
] = 0;
412 if (fix_problem(ctx
, PR_2_NON_UNIQUE_FILE
, &pctx
)) {
413 memcpy(ent
->dir
->name
, new_name
, new_len
);
414 ext2fs_dirent_set_name_len(ent
->dir
, new_len
);
415 ext2fs_dirhash(hash_alg
, ent
->dir
->name
, new_len
,
416 fs
->super
->s_hash_seed
,
417 &ent
->hash
, &ent
->minor_hash
);
425 static errcode_t
copy_dir_entries(e2fsck_t ctx
,
426 struct fill_dir_struct
*fd
,
427 struct out_dir
*outdir
)
429 ext2_filsys fs
= ctx
->fs
;
432 struct hash_entry
*ent
;
433 struct ext2_dir_entry
*dirent
;
434 unsigned int rec_len
, prev_rec_len
, left
, slack
, offset
;
436 ext2_dirhash_t prev_hash
;
438 struct ext2_dir_entry_tail
*t
;
440 if (ctx
->htree_slack_percentage
== 255) {
441 profile_get_uint(ctx
->profile
, "options",
442 "indexed_dir_slack_percentage",
444 &ctx
->htree_slack_percentage
);
445 if (ctx
->htree_slack_percentage
> 100)
446 ctx
->htree_slack_percentage
= 20;
449 if (EXT2_HAS_RO_COMPAT_FEATURE(fs
->super
,
450 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
))
451 csum_size
= sizeof(struct ext2_dir_entry_tail
);
454 retval
= alloc_size_dir(fs
, outdir
,
455 (fd
->dir_size
/ fs
->blocksize
) + 2);
458 outdir
->num
= fd
->compress
? 0 : 1;
460 outdir
->hashes
[0] = 0;
462 if ((retval
= get_next_block(fs
, outdir
, &block_start
)))
464 dirent
= (struct ext2_dir_entry
*) block_start
;
467 left
= fs
->blocksize
- csum_size
;
468 slack
= fd
->compress
? 12 :
469 ((fs
->blocksize
- csum_size
) * ctx
->htree_slack_percentage
)/100;
472 for (i
= 0; i
< fd
->num_array
; i
++) {
473 ent
= fd
->harray
+ i
;
474 if (ent
->dir
->inode
== 0)
476 rec_len
= EXT2_DIR_REC_LEN(ext2fs_dirent_name_len(ent
->dir
));
477 if (rec_len
> left
) {
479 left
+= prev_rec_len
;
480 retval
= ext2fs_set_rec_len(fs
, left
, dirent
);
485 t
= EXT2_DIRENT_TAIL(block_start
,
487 ext2fs_initialize_dirent_tail(fs
, t
);
489 if ((retval
= get_next_block(fs
, outdir
,
494 left
= (fs
->blocksize
- csum_size
) - offset
;
495 dirent
= (struct ext2_dir_entry
*) (block_start
+ offset
);
497 if (ent
->hash
== prev_hash
)
498 outdir
->hashes
[outdir
->num
-1] = ent
->hash
| 1;
500 outdir
->hashes
[outdir
->num
-1] = ent
->hash
;
502 dirent
->inode
= ent
->dir
->inode
;
503 ext2fs_dirent_set_name_len(dirent
,
504 ext2fs_dirent_name_len(ent
->dir
));
505 ext2fs_dirent_set_file_type(dirent
,
506 ext2fs_dirent_file_type(ent
->dir
));
507 retval
= ext2fs_set_rec_len(fs
, rec_len
, dirent
);
510 prev_rec_len
= rec_len
;
511 memcpy(dirent
->name
, ent
->dir
->name
,
512 ext2fs_dirent_name_len(dirent
));
516 prev_rec_len
+= left
;
517 retval
= ext2fs_set_rec_len(fs
, prev_rec_len
, dirent
);
523 prev_hash
= ent
->hash
;
526 retval
= ext2fs_set_rec_len(fs
, rec_len
+ left
, dirent
);
528 t
= EXT2_DIRENT_TAIL(block_start
, fs
->blocksize
);
529 ext2fs_initialize_dirent_tail(fs
, t
);
536 static struct ext2_dx_root_info
*set_root_node(ext2_filsys fs
, char *buf
,
537 ext2_ino_t ino
, ext2_ino_t parent
)
539 struct ext2_dir_entry
*dir
;
540 struct ext2_dx_root_info
*root
;
541 struct ext2_dx_countlimit
*limits
;
545 if (fs
->super
->s_feature_incompat
& EXT2_FEATURE_INCOMPAT_FILETYPE
)
546 filetype
= EXT2_FT_DIR
;
548 memset(buf
, 0, fs
->blocksize
);
549 dir
= (struct ext2_dir_entry
*) buf
;
552 ext2fs_dirent_set_name_len(dir
, 1);
553 ext2fs_dirent_set_file_type(dir
, filetype
);
555 dir
= (struct ext2_dir_entry
*) (buf
+ 12);
559 ext2fs_dirent_set_name_len(dir
, 2);
560 ext2fs_dirent_set_file_type(dir
, filetype
);
561 dir
->rec_len
= fs
->blocksize
- 12;
563 root
= (struct ext2_dx_root_info
*) (buf
+24);
564 root
->reserved_zero
= 0;
565 root
->hash_version
= fs
->super
->s_def_hash_version
;
566 root
->info_length
= 8;
567 root
->indirect_levels
= 0;
568 root
->unused_flags
= 0;
570 if (EXT2_HAS_RO_COMPAT_FEATURE(fs
->super
,
571 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
))
572 csum_size
= sizeof(struct ext2_dx_tail
);
574 limits
= (struct ext2_dx_countlimit
*) (buf
+32);
575 limits
->limit
= (fs
->blocksize
- (32 + csum_size
)) /
576 sizeof(struct ext2_dx_entry
);
583 static struct ext2_dx_entry
*set_int_node(ext2_filsys fs
, char *buf
)
585 struct ext2_dir_entry
*dir
;
586 struct ext2_dx_countlimit
*limits
;
589 memset(buf
, 0, fs
->blocksize
);
590 dir
= (struct ext2_dir_entry
*) buf
;
592 (void) ext2fs_set_rec_len(fs
, fs
->blocksize
, dir
);
594 if (EXT2_HAS_RO_COMPAT_FEATURE(fs
->super
,
595 EXT4_FEATURE_RO_COMPAT_METADATA_CSUM
))
596 csum_size
= sizeof(struct ext2_dx_tail
);
598 limits
= (struct ext2_dx_countlimit
*) (buf
+8);
599 limits
->limit
= (fs
->blocksize
- (8 + csum_size
)) /
600 sizeof(struct ext2_dx_entry
);
603 return (struct ext2_dx_entry
*) limits
;
607 * This function takes the leaf nodes which have been written in
608 * outdir, and populates the root node and any necessary interior nodes.
610 static errcode_t
calculate_tree(ext2_filsys fs
,
611 struct out_dir
*outdir
,
615 struct ext2_dx_root_info
*root_info
;
616 struct ext2_dx_entry
*root
, *dx_ent
= 0;
617 struct ext2_dx_countlimit
*root_limit
, *limit
;
620 int i
, c1
, c2
, nblks
;
621 int limit_offset
, root_offset
;
623 root_info
= set_root_node(fs
, outdir
->buf
, ino
, parent
);
624 root_offset
= limit_offset
= ((char *) root_info
- outdir
->buf
) +
625 root_info
->info_length
;
626 root_limit
= (struct ext2_dx_countlimit
*) (outdir
->buf
+ limit_offset
);
627 c1
= root_limit
->limit
;
630 /* Write out the pointer blocks */
632 /* Just write out the root block, and we're done */
633 root
= (struct ext2_dx_entry
*) (outdir
->buf
+ root_offset
);
634 for (i
=1; i
< nblks
; i
++) {
635 root
->block
= ext2fs_cpu_to_le32(i
);
638 ext2fs_cpu_to_le32(outdir
->hashes
[i
]);
645 root_info
->indirect_levels
= 1;
646 for (i
=1; i
< nblks
; i
++) {
651 limit
->limit
= limit
->count
=
652 ext2fs_cpu_to_le16(limit
->limit
);
653 root
= (struct ext2_dx_entry
*)
654 (outdir
->buf
+ root_offset
);
655 root
->block
= ext2fs_cpu_to_le32(outdir
->num
);
658 ext2fs_cpu_to_le32(outdir
->hashes
[i
]);
659 if ((retval
= get_next_block(fs
, outdir
,
662 dx_ent
= set_int_node(fs
, block_start
);
663 limit
= (struct ext2_dx_countlimit
*) dx_ent
;
665 root_offset
+= sizeof(struct ext2_dx_entry
);
668 dx_ent
->block
= ext2fs_cpu_to_le32(i
);
669 if (c2
!= limit
->limit
)
671 ext2fs_cpu_to_le32(outdir
->hashes
[i
]);
675 limit
->count
= ext2fs_cpu_to_le16(limit
->limit
- c2
);
676 limit
->limit
= ext2fs_cpu_to_le16(limit
->limit
);
678 root_limit
= (struct ext2_dx_countlimit
*) (outdir
->buf
+ limit_offset
);
679 root_limit
->count
= ext2fs_cpu_to_le16(root_limit
->limit
- c1
);
680 root_limit
->limit
= ext2fs_cpu_to_le16(root_limit
->limit
);
685 struct write_dir_struct
{
686 struct out_dir
*outdir
;
694 * Helper function which writes out a directory block.
696 static int write_dir_block(ext2_filsys fs
,
698 e2_blkcnt_t blockcnt
,
699 blk64_t ref_block
EXT2FS_ATTR((unused
)),
700 int ref_offset
EXT2FS_ATTR((unused
)),
703 struct write_dir_struct
*wd
= (struct write_dir_struct
*) priv_data
;
711 if (blockcnt
< wd
->outdir
->num
)
712 dir
= wd
->outdir
->buf
+ (blockcnt
* fs
->blocksize
);
713 else if (wd
->ctx
->lost_and_found
== wd
->dir
) {
714 /* Don't release any extra directory blocks for lost+found */
715 wd
->err
= ext2fs_new_dir_block(fs
, 0, 0, &buf
);
721 /* We don't need this block, so release it */
722 e2fsck_read_bitmaps(wd
->ctx
);
725 * In theory, we only release blocks from the end of the
726 * directory file, so it's fine to clobber a whole cluster at
729 if (blk
% EXT2FS_CLUSTER_RATIO(fs
) == 0) {
730 ext2fs_block_alloc_stats2(fs
, blk
, -1);
734 return BLOCK_CHANGED
;
737 wd
->err
= ext2fs_write_dir_block4(fs
, *block_nr
, dir
, 0, wd
->dir
);
739 ext2fs_free_mem(&buf
);
746 static errcode_t
write_directory(e2fsck_t ctx
, ext2_filsys fs
,
747 struct out_dir
*outdir
,
748 ext2_ino_t ino
, int compress
)
750 struct write_dir_struct wd
;
752 struct ext2_inode inode
;
754 retval
= e2fsck_expand_directory(ctx
, ino
, -1, outdir
->num
);
764 retval
= ext2fs_block_iterate3(fs
, ino
, 0, 0,
765 write_dir_block
, &wd
);
771 e2fsck_read_inode(ctx
, ino
, &inode
, "rehash_dir");
773 inode
.i_flags
&= ~EXT2_INDEX_FL
;
775 inode
.i_flags
|= EXT2_INDEX_FL
;
776 retval
= ext2fs_inode_size_set(fs
, &inode
,
777 outdir
->num
* fs
->blocksize
);
780 ext2fs_iblk_sub_blocks(fs
, &inode
, wd
.cleared
);
781 e2fsck_write_inode(ctx
, ino
, &inode
, "rehash_dir");
786 errcode_t
e2fsck_rehash_dir(e2fsck_t ctx
, ext2_ino_t ino
)
788 ext2_filsys fs
= ctx
->fs
;
790 struct ext2_inode inode
;
792 struct fill_dir_struct fd
;
793 struct out_dir outdir
;
795 outdir
.max
= outdir
.num
= 0;
798 e2fsck_read_inode(ctx
, ino
, &inode
, "rehash_dir");
800 if (EXT2_HAS_INCOMPAT_FEATURE(fs
->super
,
801 EXT4_FEATURE_INCOMPAT_INLINE_DATA
) &&
802 (inode
.i_flags
& EXT4_INLINE_DATA_FL
))
807 dir_buf
= malloc(inode
.i_size
);
811 fd
.max_array
= inode
.i_size
/ 32;
813 fd
.harray
= malloc(fd
.max_array
* sizeof(struct hash_entry
));
824 if (!(fs
->super
->s_feature_compat
& EXT2_FEATURE_COMPAT_DIR_INDEX
) ||
825 (inode
.i_size
/ fs
->blocksize
) < 2)
830 /* Read in the entire directory into memory */
831 retval
= ext2fs_block_iterate3(fs
, ino
, 0, 0,
832 fill_dir_block
, &fd
);
839 * If the entries read are less than a block, then don't index
842 if (!fd
.compress
&& (fd
.dir_size
< (fs
->blocksize
- 24))) {
850 printf("%d entries (%d bytes) found in inode %d\n",
851 fd
.num_array
, fd
.dir_size
, ino
);
856 if (fd
.compress
&& fd
.num_array
> 1)
857 qsort(fd
.harray
+2, fd
.num_array
-2, sizeof(struct hash_entry
),
860 qsort(fd
.harray
, fd
.num_array
, sizeof(struct hash_entry
),
864 * Look for duplicates
866 if (duplicate_search_and_fix(ctx
, fs
, ino
, &fd
))
869 if (ctx
->options
& E2F_OPT_NO
) {
874 /* Sort non-hashed directories by inode number */
875 if (fd
.compress
&& fd
.num_array
> 1)
876 qsort(fd
.harray
+2, fd
.num_array
-2,
877 sizeof(struct hash_entry
), ino_cmp
);
880 * Copy the directory entries. In a htree directory these
881 * will become the leaf nodes.
883 retval
= copy_dir_entries(ctx
, &fd
, &outdir
);
887 free(dir_buf
); dir_buf
= 0;
890 /* Calculate the interior nodes */
891 retval
= calculate_tree(fs
, &outdir
, ino
, fd
.parent
);
896 retval
= write_directory(ctx
, fs
, &outdir
, ino
, fd
.compress
);
904 free_out_dir(&outdir
);
908 void e2fsck_rehash_directories(e2fsck_t ctx
)
910 struct problem_context pctx
;
911 #ifdef RESOURCE_TRACK
912 struct resource_track rtrack
;
914 struct dir_info
*dir
;
915 ext2_u32_iterate iter
;
916 struct dir_info_iter
* dirinfo_iter
= 0;
919 int cur
, max
, all_dirs
, first
= 1;
921 init_resource_track(&rtrack
, ctx
->fs
->io
);
922 all_dirs
= ctx
->options
& E2F_OPT_COMPRESS_DIRS
;
924 if (!ctx
->dirs_to_hash
&& !all_dirs
)
927 (void) e2fsck_get_lost_and_found(ctx
, 0);
929 clear_problem_context(&pctx
);
933 dirinfo_iter
= e2fsck_dir_info_iter_begin(ctx
);
934 max
= e2fsck_get_num_dirinfo(ctx
);
936 retval
= ext2fs_u32_list_iterate_begin(ctx
->dirs_to_hash
,
939 pctx
.errcode
= retval
;
940 fix_problem(ctx
, PR_3A_OPTIMIZE_ITER
, &pctx
);
943 max
= ext2fs_u32_list_count(ctx
->dirs_to_hash
);
947 if ((dir
= e2fsck_dir_info_iter(ctx
,
952 if (!ext2fs_u32_list_iterate(iter
, &ino
))
958 fix_problem(ctx
, PR_3A_PASS_HEADER
, &pctx
);
962 fix_problem(ctx
, PR_3A_OPTIMIZE_DIR
, &pctx
);
964 pctx
.errcode
= e2fsck_rehash_dir(ctx
, ino
);
966 end_problem_latch(ctx
, PR_LATCH_OPTIMIZE_DIR
);
967 fix_problem(ctx
, PR_3A_OPTIMIZE_DIR_ERR
, &pctx
);
969 if (ctx
->progress
&& !ctx
->progress_fd
)
970 e2fsck_simple_progress(ctx
, "Rebuilding directory",
971 100.0 * (float) (++cur
) / (float) max
, ino
);
973 end_problem_latch(ctx
, PR_LATCH_OPTIMIZE_DIR
);
975 e2fsck_dir_info_iter_end(ctx
, dirinfo_iter
);
977 ext2fs_u32_list_iterate_end(iter
);
979 if (ctx
->dirs_to_hash
)
980 ext2fs_u32_list_free(ctx
->dirs_to_hash
);
981 ctx
->dirs_to_hash
= 0;
983 print_resource_track(ctx
, "Pass 3A", &rtrack
, ctx
->fs
->io
);