2 * This file is part of UBIFS.
4 * Copyright (C) 2006-2008 Nokia Corporation.
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License version 2 as published by
8 * the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along with
16 * this program; if not, write to the Free Software Foundation, Inc., 51
17 * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
19 * Author: Adrian Hunter
25 * An orphan is an inode number whose inode node has been committed to the index
26 * with a link count of zero. That happens when an open file is deleted
27 * (unlinked) and then a commit is run. In the normal course of events the inode
28 * would be deleted when the file is closed. However in the case of an unclean
29 * unmount, orphans need to be accounted for. After an unclean unmount, the
30 * orphans' inodes must be deleted which means either scanning the entire index
31 * looking for them, or keeping a list on flash somewhere. This unit implements
32 * the latter approach.
34 * The orphan area is a fixed number of LEBs situated between the LPT area and
35 * the main area. The number of orphan area LEBs is specified when the file
36 * system is created. The minimum number is 1. The size of the orphan area
37 * should be so that it can hold the maximum number of orphans that are expected
38 * to ever exist at one time.
40 * The number of orphans that can fit in a LEB is:
42 * (c->leb_size - UBIFS_ORPH_NODE_SZ) / sizeof(__le64)
44 * For example: a 15872 byte LEB can fit 1980 orphans so 1 LEB may be enough.
46 * Orphans are accumulated in a rb-tree. When an inode's link count drops to
47 * zero, the inode number is added to the rb-tree. It is removed from the tree
48 * when the inode is deleted. Any new orphans that are in the orphan tree when
49 * the commit is run, are written to the orphan area in 1 or more orphan nodes.
50 * If the orphan area is full, it is consolidated to make space. There is
51 * always enough space because validation prevents the user from creating more
52 * than the maximum number of orphans allowed.
55 static int dbg_check_orphans(struct ubifs_info
*c
);
58 * ubifs_add_orphan - add an orphan.
59 * @c: UBIFS file-system description object
60 * @inum: orphan inode number
62 * Add an orphan. This function is called when an inodes link count drops to
65 int ubifs_add_orphan(struct ubifs_info
*c
, ino_t inum
)
67 struct ubifs_orphan
*orphan
, *o
;
68 struct rb_node
**p
, *parent
= NULL
;
70 orphan
= kzalloc(sizeof(struct ubifs_orphan
), GFP_NOFS
);
76 spin_lock(&c
->orphan_lock
);
77 if (c
->tot_orphans
>= c
->max_orphans
) {
78 spin_unlock(&c
->orphan_lock
);
82 p
= &c
->orph_tree
.rb_node
;
85 o
= rb_entry(parent
, struct ubifs_orphan
, rb
);
88 else if (inum
> o
->inum
)
91 dbg_err("orphaned twice");
92 spin_unlock(&c
->orphan_lock
);
99 rb_link_node(&orphan
->rb
, parent
, p
);
100 rb_insert_color(&orphan
->rb
, &c
->orph_tree
);
101 list_add_tail(&orphan
->list
, &c
->orph_list
);
102 list_add_tail(&orphan
->new_list
, &c
->orph_new
);
103 spin_unlock(&c
->orphan_lock
);
104 dbg_gen("ino %lu", (unsigned long)inum
);
109 * ubifs_delete_orphan - delete an orphan.
110 * @c: UBIFS file-system description object
111 * @inum: orphan inode number
113 * Delete an orphan. This function is called when an inode is deleted.
115 void ubifs_delete_orphan(struct ubifs_info
*c
, ino_t inum
)
117 struct ubifs_orphan
*o
;
120 spin_lock(&c
->orphan_lock
);
121 p
= c
->orph_tree
.rb_node
;
123 o
= rb_entry(p
, struct ubifs_orphan
, rb
);
126 else if (inum
> o
->inum
)
130 spin_unlock(&c
->orphan_lock
);
131 dbg_gen("deleted twice ino %lu",
132 (unsigned long)inum
);
136 o
->dnext
= c
->orph_dnext
;
138 spin_unlock(&c
->orphan_lock
);
139 dbg_gen("delete later ino %lu",
140 (unsigned long)inum
);
143 rb_erase(p
, &c
->orph_tree
);
147 list_del(&o
->new_list
);
150 spin_unlock(&c
->orphan_lock
);
152 dbg_gen("inum %lu", (unsigned long)inum
);
156 spin_unlock(&c
->orphan_lock
);
157 dbg_err("missing orphan ino %lu", (unsigned long)inum
);
162 * ubifs_orphan_start_commit - start commit of orphans.
163 * @c: UBIFS file-system description object
165 * Start commit of orphans.
167 int ubifs_orphan_start_commit(struct ubifs_info
*c
)
169 struct ubifs_orphan
*orphan
, **last
;
171 spin_lock(&c
->orphan_lock
);
172 last
= &c
->orph_cnext
;
173 list_for_each_entry(orphan
, &c
->orph_new
, new_list
) {
174 ubifs_assert(orphan
->new);
177 last
= &orphan
->cnext
;
179 *last
= orphan
->cnext
;
180 c
->cmt_orphans
= c
->new_orphans
;
182 dbg_cmt("%d orphans to commit", c
->cmt_orphans
);
183 INIT_LIST_HEAD(&c
->orph_new
);
184 if (c
->tot_orphans
== 0)
188 spin_unlock(&c
->orphan_lock
);
193 * avail_orphs - calculate available space.
194 * @c: UBIFS file-system description object
196 * This function returns the number of orphans that can be written in the
199 static int avail_orphs(struct ubifs_info
*c
)
201 int avail_lebs
, avail
, gap
;
203 avail_lebs
= c
->orph_lebs
- (c
->ohead_lnum
- c
->orph_first
) - 1;
205 ((c
->leb_size
- UBIFS_ORPH_NODE_SZ
) / sizeof(__le64
));
206 gap
= c
->leb_size
- c
->ohead_offs
;
207 if (gap
>= UBIFS_ORPH_NODE_SZ
+ sizeof(__le64
))
208 avail
+= (gap
- UBIFS_ORPH_NODE_SZ
) / sizeof(__le64
);
213 * tot_avail_orphs - calculate total space.
214 * @c: UBIFS file-system description object
216 * This function returns the number of orphans that can be written in half
217 * the total space. That leaves half the space for adding new orphans.
219 static int tot_avail_orphs(struct ubifs_info
*c
)
221 int avail_lebs
, avail
;
223 avail_lebs
= c
->orph_lebs
;
225 ((c
->leb_size
- UBIFS_ORPH_NODE_SZ
) / sizeof(__le64
));
230 * do_write_orph_node - write a node to the orphan head.
231 * @c: UBIFS file-system description object
232 * @len: length of node
233 * @atomic: write atomically
235 * This function writes a node to the orphan head from the orphan buffer. If
236 * %atomic is not zero, then the write is done atomically. On success, %0 is
237 * returned, otherwise a negative error code is returned.
239 static int do_write_orph_node(struct ubifs_info
*c
, int len
, int atomic
)
244 ubifs_assert(c
->ohead_offs
== 0);
245 ubifs_prepare_node(c
, c
->orph_buf
, len
, 1);
246 len
= ALIGN(len
, c
->min_io_size
);
247 err
= ubifs_leb_change(c
, c
->ohead_lnum
, c
->orph_buf
, len
,
250 if (c
->ohead_offs
== 0) {
251 /* Ensure LEB has been unmapped */
252 err
= ubifs_leb_unmap(c
, c
->ohead_lnum
);
256 err
= ubifs_write_node(c
, c
->orph_buf
, len
, c
->ohead_lnum
,
257 c
->ohead_offs
, UBI_SHORTTERM
);
263 * write_orph_node - write an orphan node.
264 * @c: UBIFS file-system description object
265 * @atomic: write atomically
267 * This function builds an orphan node from the cnext list and writes it to the
268 * orphan head. On success, %0 is returned, otherwise a negative error code
271 static int write_orph_node(struct ubifs_info
*c
, int atomic
)
273 struct ubifs_orphan
*orphan
, *cnext
;
274 struct ubifs_orph_node
*orph
;
275 int gap
, err
, len
, cnt
, i
;
277 ubifs_assert(c
->cmt_orphans
> 0);
278 gap
= c
->leb_size
- c
->ohead_offs
;
279 if (gap
< UBIFS_ORPH_NODE_SZ
+ sizeof(__le64
)) {
283 if (c
->ohead_lnum
> c
->orph_last
) {
285 * We limit the number of orphans so that this should
288 ubifs_err("out of space in orphan area");
292 cnt
= (gap
- UBIFS_ORPH_NODE_SZ
) / sizeof(__le64
);
293 if (cnt
> c
->cmt_orphans
)
294 cnt
= c
->cmt_orphans
;
295 len
= UBIFS_ORPH_NODE_SZ
+ cnt
* sizeof(__le64
);
296 ubifs_assert(c
->orph_buf
);
298 orph
->ch
.node_type
= UBIFS_ORPH_NODE
;
299 spin_lock(&c
->orphan_lock
);
300 cnext
= c
->orph_cnext
;
301 for (i
= 0; i
< cnt
; i
++) {
303 orph
->inos
[i
] = cpu_to_le64(orphan
->inum
);
304 cnext
= orphan
->cnext
;
305 orphan
->cnext
= NULL
;
307 c
->orph_cnext
= cnext
;
308 c
->cmt_orphans
-= cnt
;
309 spin_unlock(&c
->orphan_lock
);
311 orph
->cmt_no
= cpu_to_le64(c
->cmt_no
);
313 /* Mark the last node of the commit */
314 orph
->cmt_no
= cpu_to_le64((c
->cmt_no
) | (1ULL << 63));
315 ubifs_assert(c
->ohead_offs
+ len
<= c
->leb_size
);
316 ubifs_assert(c
->ohead_lnum
>= c
->orph_first
);
317 ubifs_assert(c
->ohead_lnum
<= c
->orph_last
);
318 err
= do_write_orph_node(c
, len
, atomic
);
319 c
->ohead_offs
+= ALIGN(len
, c
->min_io_size
);
320 c
->ohead_offs
= ALIGN(c
->ohead_offs
, 8);
325 * write_orph_nodes - write orphan nodes until there are no more to commit.
326 * @c: UBIFS file-system description object
327 * @atomic: write atomically
329 * This function writes orphan nodes for all the orphans to commit. On success,
330 * %0 is returned, otherwise a negative error code is returned.
332 static int write_orph_nodes(struct ubifs_info
*c
, int atomic
)
336 while (c
->cmt_orphans
> 0) {
337 err
= write_orph_node(c
, atomic
);
344 /* Unmap any unused LEBs after consolidation */
345 lnum
= c
->ohead_lnum
+ 1;
346 for (lnum
= c
->ohead_lnum
+ 1; lnum
<= c
->orph_last
; lnum
++) {
347 err
= ubifs_leb_unmap(c
, lnum
);
356 * consolidate - consolidate the orphan area.
357 * @c: UBIFS file-system description object
359 * This function enables consolidation by putting all the orphans into the list
360 * to commit. The list is in the order that the orphans were added, and the
361 * LEBs are written atomically in order, so at no time can orphans be lost by
362 * an unclean unmount.
364 * This function returns %0 on success and a negative error code on failure.
366 static int consolidate(struct ubifs_info
*c
)
368 int tot_avail
= tot_avail_orphs(c
), err
= 0;
370 spin_lock(&c
->orphan_lock
);
371 dbg_cmt("there is space for %d orphans and there are %d",
372 tot_avail
, c
->tot_orphans
);
373 if (c
->tot_orphans
- c
->new_orphans
<= tot_avail
) {
374 struct ubifs_orphan
*orphan
, **last
;
377 /* Change the cnext list to include all non-new orphans */
378 last
= &c
->orph_cnext
;
379 list_for_each_entry(orphan
, &c
->orph_list
, list
) {
383 last
= &orphan
->cnext
;
386 *last
= orphan
->cnext
;
387 ubifs_assert(cnt
== c
->tot_orphans
- c
->new_orphans
);
388 c
->cmt_orphans
= cnt
;
389 c
->ohead_lnum
= c
->orph_first
;
393 * We limit the number of orphans so that this should
396 ubifs_err("out of space in orphan area");
399 spin_unlock(&c
->orphan_lock
);
404 * commit_orphans - commit orphans.
405 * @c: UBIFS file-system description object
407 * This function commits orphans to flash. On success, %0 is returned,
408 * otherwise a negative error code is returned.
410 static int commit_orphans(struct ubifs_info
*c
)
412 int avail
, atomic
= 0, err
;
414 ubifs_assert(c
->cmt_orphans
> 0);
415 avail
= avail_orphs(c
);
416 if (avail
< c
->cmt_orphans
) {
417 /* Not enough space to write new orphans, so consolidate */
418 err
= consolidate(c
);
423 err
= write_orph_nodes(c
, atomic
);
428 * erase_deleted - erase the orphans marked for deletion.
429 * @c: UBIFS file-system description object
431 * During commit, the orphans being committed cannot be deleted, so they are
432 * marked for deletion and deleted by this function. Also, the recovery
433 * adds killed orphans to the deletion list, and therefore they are deleted
436 static void erase_deleted(struct ubifs_info
*c
)
438 struct ubifs_orphan
*orphan
, *dnext
;
440 spin_lock(&c
->orphan_lock
);
441 dnext
= c
->orph_dnext
;
444 dnext
= orphan
->dnext
;
445 ubifs_assert(!orphan
->new);
446 rb_erase(&orphan
->rb
, &c
->orph_tree
);
447 list_del(&orphan
->list
);
449 dbg_gen("deleting orphan ino %lu", (unsigned long)orphan
->inum
);
452 c
->orph_dnext
= NULL
;
453 spin_unlock(&c
->orphan_lock
);
457 * ubifs_orphan_end_commit - end commit of orphans.
458 * @c: UBIFS file-system description object
460 * End commit of orphans.
462 int ubifs_orphan_end_commit(struct ubifs_info
*c
)
466 if (c
->cmt_orphans
!= 0) {
467 err
= commit_orphans(c
);
472 err
= dbg_check_orphans(c
);
477 * ubifs_clear_orphans - erase all LEBs used for orphans.
478 * @c: UBIFS file-system description object
480 * If recovery is not required, then the orphans from the previous session
481 * are not needed. This function locates the LEBs used to record
482 * orphans, and un-maps them.
484 int ubifs_clear_orphans(struct ubifs_info
*c
)
488 for (lnum
= c
->orph_first
; lnum
<= c
->orph_last
; lnum
++) {
489 err
= ubifs_leb_unmap(c
, lnum
);
493 c
->ohead_lnum
= c
->orph_first
;
499 * insert_dead_orphan - insert an orphan.
500 * @c: UBIFS file-system description object
501 * @inum: orphan inode number
503 * This function is a helper to the 'do_kill_orphans()' function. The orphan
504 * must be kept until the next commit, so it is added to the rb-tree and the
507 static int insert_dead_orphan(struct ubifs_info
*c
, ino_t inum
)
509 struct ubifs_orphan
*orphan
, *o
;
510 struct rb_node
**p
, *parent
= NULL
;
512 orphan
= kzalloc(sizeof(struct ubifs_orphan
), GFP_KERNEL
);
517 p
= &c
->orph_tree
.rb_node
;
520 o
= rb_entry(parent
, struct ubifs_orphan
, rb
);
523 else if (inum
> o
->inum
)
526 /* Already added - no problem */
532 rb_link_node(&orphan
->rb
, parent
, p
);
533 rb_insert_color(&orphan
->rb
, &c
->orph_tree
);
534 list_add_tail(&orphan
->list
, &c
->orph_list
);
535 orphan
->dnext
= c
->orph_dnext
;
536 c
->orph_dnext
= orphan
;
537 dbg_mnt("ino %lu, new %d, tot %d", (unsigned long)inum
,
538 c
->new_orphans
, c
->tot_orphans
);
543 * do_kill_orphans - remove orphan inodes from the index.
544 * @c: UBIFS file-system description object
546 * @last_cmt_no: cmt_no of last orphan node read is passed and returned here
547 * @outofdate: whether the LEB is out of date is returned here
548 * @last_flagged: whether the end orphan node is encountered
550 * This function is a helper to the 'kill_orphans()' function. It goes through
551 * every orphan node in a LEB and for every inode number recorded, removes
552 * all keys for that inode from the TNC.
554 static int do_kill_orphans(struct ubifs_info
*c
, struct ubifs_scan_leb
*sleb
,
555 unsigned long long *last_cmt_no
, int *outofdate
,
558 struct ubifs_scan_node
*snod
;
559 struct ubifs_orph_node
*orph
;
560 unsigned long long cmt_no
;
562 int i
, n
, err
, first
= 1;
564 list_for_each_entry(snod
, &sleb
->nodes
, list
) {
565 if (snod
->type
!= UBIFS_ORPH_NODE
) {
566 ubifs_err("invalid node type %d in orphan area at "
567 "%d:%d", snod
->type
, sleb
->lnum
, snod
->offs
);
568 ubifs_dump_node(c
, snod
->node
);
574 /* Check commit number */
575 cmt_no
= le64_to_cpu(orph
->cmt_no
) & LLONG_MAX
;
577 * The commit number on the master node may be less, because
578 * of a failed commit. If there are several failed commits in a
579 * row, the commit number written on orphan nodes will continue
580 * to increase (because the commit number is adjusted here) even
581 * though the commit number on the master node stays the same
582 * because the master node has not been re-written.
584 if (cmt_no
> c
->cmt_no
)
586 if (cmt_no
< *last_cmt_no
&& *last_flagged
) {
588 * The last orphan node had a higher commit number and
589 * was flagged as the last written for that commit
590 * number. That makes this orphan node, out of date.
593 ubifs_err("out of order commit number %llu in "
594 "orphan node at %d:%d",
595 cmt_no
, sleb
->lnum
, snod
->offs
);
596 ubifs_dump_node(c
, snod
->node
);
599 dbg_rcvry("out of date LEB %d", sleb
->lnum
);
607 n
= (le32_to_cpu(orph
->ch
.len
) - UBIFS_ORPH_NODE_SZ
) >> 3;
608 for (i
= 0; i
< n
; i
++) {
609 inum
= le64_to_cpu(orph
->inos
[i
]);
610 dbg_rcvry("deleting orphaned inode %lu",
611 (unsigned long)inum
);
612 err
= ubifs_tnc_remove_ino(c
, inum
);
615 err
= insert_dead_orphan(c
, inum
);
620 *last_cmt_no
= cmt_no
;
621 if (le64_to_cpu(orph
->cmt_no
) & (1ULL << 63)) {
622 dbg_rcvry("last orph node for commit %llu at %d:%d",
623 cmt_no
, sleb
->lnum
, snod
->offs
);
633 * kill_orphans - remove all orphan inodes from the index.
634 * @c: UBIFS file-system description object
636 * If recovery is required, then orphan inodes recorded during the previous
637 * session (which ended with an unclean unmount) must be deleted from the index.
638 * This is done by updating the TNC, but since the index is not updated until
639 * the next commit, the LEBs where the orphan information is recorded are not
640 * erased until the next commit.
642 static int kill_orphans(struct ubifs_info
*c
)
644 unsigned long long last_cmt_no
= 0;
645 int lnum
, err
= 0, outofdate
= 0, last_flagged
= 0;
647 c
->ohead_lnum
= c
->orph_first
;
649 /* Check no-orphans flag and skip this if no orphans */
651 dbg_rcvry("no orphans");
655 * Orph nodes always start at c->orph_first and are written to each
656 * successive LEB in turn. Generally unused LEBs will have been unmapped
657 * but may contain out of date orphan nodes if the unmap didn't go
658 * through. In addition, the last orphan node written for each commit is
659 * marked (top bit of orph->cmt_no is set to 1). It is possible that
660 * there are orphan nodes from the next commit (i.e. the commit did not
661 * complete successfully). In that case, no orphans will have been lost
662 * due to the way that orphans are written, and any orphans added will
663 * be valid orphans anyway and so can be deleted.
665 for (lnum
= c
->orph_first
; lnum
<= c
->orph_last
; lnum
++) {
666 struct ubifs_scan_leb
*sleb
;
668 dbg_rcvry("LEB %d", lnum
);
669 sleb
= ubifs_scan(c
, lnum
, 0, c
->sbuf
, 1);
671 if (PTR_ERR(sleb
) == -EUCLEAN
)
672 sleb
= ubifs_recover_leb(c
, lnum
, 0,
679 err
= do_kill_orphans(c
, sleb
, &last_cmt_no
, &outofdate
,
681 if (err
|| outofdate
) {
682 ubifs_scan_destroy(sleb
);
686 c
->ohead_lnum
= lnum
;
687 c
->ohead_offs
= sleb
->endpt
;
689 ubifs_scan_destroy(sleb
);
695 * ubifs_mount_orphans - delete orphan inodes and erase LEBs that recorded them.
696 * @c: UBIFS file-system description object
697 * @unclean: indicates recovery from unclean unmount
698 * @read_only: indicates read only mount
700 * This function is called when mounting to erase orphans from the previous
701 * session. If UBIFS was not unmounted cleanly, then the inodes recorded as
702 * orphans are deleted.
704 int ubifs_mount_orphans(struct ubifs_info
*c
, int unclean
, int read_only
)
708 c
->max_orphans
= tot_avail_orphs(c
);
711 c
->orph_buf
= vmalloc(c
->leb_size
);
717 err
= kill_orphans(c
);
719 err
= ubifs_clear_orphans(c
);
725 * Everything below is related to debugging.
728 struct check_orphan
{
734 unsigned long last_ino
;
735 unsigned long tot_inos
;
736 unsigned long missing
;
737 unsigned long long leaf_cnt
;
738 struct ubifs_ino_node
*node
;
742 static int dbg_find_orphan(struct ubifs_info
*c
, ino_t inum
)
744 struct ubifs_orphan
*o
;
747 spin_lock(&c
->orphan_lock
);
748 p
= c
->orph_tree
.rb_node
;
750 o
= rb_entry(p
, struct ubifs_orphan
, rb
);
753 else if (inum
> o
->inum
)
756 spin_unlock(&c
->orphan_lock
);
760 spin_unlock(&c
->orphan_lock
);
764 static int dbg_ins_check_orphan(struct rb_root
*root
, ino_t inum
)
766 struct check_orphan
*orphan
, *o
;
767 struct rb_node
**p
, *parent
= NULL
;
769 orphan
= kzalloc(sizeof(struct check_orphan
), GFP_NOFS
);
777 o
= rb_entry(parent
, struct check_orphan
, rb
);
780 else if (inum
> o
->inum
)
787 rb_link_node(&orphan
->rb
, parent
, p
);
788 rb_insert_color(&orphan
->rb
, root
);
792 static int dbg_find_check_orphan(struct rb_root
*root
, ino_t inum
)
794 struct check_orphan
*o
;
799 o
= rb_entry(p
, struct check_orphan
, rb
);
802 else if (inum
> o
->inum
)
810 static void dbg_free_check_tree(struct rb_root
*root
)
812 struct rb_node
*this = root
->rb_node
;
813 struct check_orphan
*o
;
817 this = this->rb_left
;
819 } else if (this->rb_right
) {
820 this = this->rb_right
;
823 o
= rb_entry(this, struct check_orphan
, rb
);
824 this = rb_parent(this);
826 if (this->rb_left
== &o
->rb
)
827 this->rb_left
= NULL
;
829 this->rb_right
= NULL
;
835 static int dbg_orphan_check(struct ubifs_info
*c
, struct ubifs_zbranch
*zbr
,
838 struct check_info
*ci
= priv
;
842 inum
= key_inum(c
, &zbr
->key
);
843 if (inum
!= ci
->last_ino
) {
844 /* Lowest node type is the inode node, so it comes first */
845 if (key_type(c
, &zbr
->key
) != UBIFS_INO_KEY
)
846 ubifs_err("found orphan node ino %lu, type %d",
847 (unsigned long)inum
, key_type(c
, &zbr
->key
));
850 err
= ubifs_tnc_read_node(c
, zbr
, ci
->node
);
852 ubifs_err("node read failed, error %d", err
);
855 if (ci
->node
->nlink
== 0)
856 /* Must be recorded as an orphan */
857 if (!dbg_find_check_orphan(&ci
->root
, inum
) &&
858 !dbg_find_orphan(c
, inum
)) {
859 ubifs_err("missing orphan, ino %lu",
860 (unsigned long)inum
);
868 static int dbg_read_orphans(struct check_info
*ci
, struct ubifs_scan_leb
*sleb
)
870 struct ubifs_scan_node
*snod
;
871 struct ubifs_orph_node
*orph
;
875 list_for_each_entry(snod
, &sleb
->nodes
, list
) {
877 if (snod
->type
!= UBIFS_ORPH_NODE
)
880 n
= (le32_to_cpu(orph
->ch
.len
) - UBIFS_ORPH_NODE_SZ
) >> 3;
881 for (i
= 0; i
< n
; i
++) {
882 inum
= le64_to_cpu(orph
->inos
[i
]);
883 err
= dbg_ins_check_orphan(&ci
->root
, inum
);
891 static int dbg_scan_orphans(struct ubifs_info
*c
, struct check_info
*ci
)
896 /* Check no-orphans flag and skip this if no orphans */
900 buf
= __vmalloc(c
->leb_size
, GFP_NOFS
, PAGE_KERNEL
);
902 ubifs_err("cannot allocate memory to check orphans");
906 for (lnum
= c
->orph_first
; lnum
<= c
->orph_last
; lnum
++) {
907 struct ubifs_scan_leb
*sleb
;
909 sleb
= ubifs_scan(c
, lnum
, 0, buf
, 0);
915 err
= dbg_read_orphans(ci
, sleb
);
916 ubifs_scan_destroy(sleb
);
925 static int dbg_check_orphans(struct ubifs_info
*c
)
927 struct check_info ci
;
930 if (!dbg_is_chk_orph(c
))
938 ci
.node
= kmalloc(UBIFS_MAX_INO_NODE_SZ
, GFP_NOFS
);
940 ubifs_err("out of memory");
944 err
= dbg_scan_orphans(c
, &ci
);
948 err
= dbg_walk_index(c
, &dbg_orphan_check
, NULL
, &ci
);
950 ubifs_err("cannot scan TNC, error %d", err
);
955 ubifs_err("%lu missing orphan(s)", ci
.missing
);
960 dbg_cmt("last inode number is %lu", ci
.last_ino
);
961 dbg_cmt("total number of inodes is %lu", ci
.tot_inos
);
962 dbg_cmt("total number of leaf nodes is %llu", ci
.leaf_cnt
);
965 dbg_free_check_tree(&ci
.root
);