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20#include <linux/types.h>
21#include <linux/buffer_head.h>
22#include <linux/fs.h>
23#include <linux/bitops.h>
24#include <linux/slab.h>
25#include "mdt.h"
26#include "alloc.h"
27
28
29
30
31
32
33
34static inline unsigned long
35nilfs_palloc_groups_per_desc_block(const struct inode *inode)
36{
37 return (1UL << inode->i_blkbits) /
38 sizeof(struct nilfs_palloc_group_desc);
39}
40
41
42
43
44
45static inline unsigned long
46nilfs_palloc_groups_count(const struct inode *inode)
47{
48 return 1UL << (BITS_PER_LONG - (inode->i_blkbits + 3 ));
49}
50
51
52
53
54
55
56int nilfs_palloc_init_blockgroup(struct inode *inode, unsigned int entry_size)
57{
58 struct nilfs_mdt_info *mi = NILFS_MDT(inode);
59
60 mi->mi_bgl = kmalloc(sizeof(*mi->mi_bgl), GFP_NOFS);
61 if (!mi->mi_bgl)
62 return -ENOMEM;
63
64 bgl_lock_init(mi->mi_bgl);
65
66 nilfs_mdt_set_entry_size(inode, entry_size, 0);
67
68 mi->mi_blocks_per_group =
69 DIV_ROUND_UP(nilfs_palloc_entries_per_group(inode),
70 mi->mi_entries_per_block) + 1;
71
72
73
74
75 mi->mi_blocks_per_desc_block =
76 nilfs_palloc_groups_per_desc_block(inode) *
77 mi->mi_blocks_per_group + 1;
78
79
80
81
82 return 0;
83}
84
85
86
87
88
89
90
91static unsigned long nilfs_palloc_group(const struct inode *inode, __u64 nr,
92 unsigned long *offset)
93{
94 __u64 group = nr;
95
96 *offset = do_div(group, nilfs_palloc_entries_per_group(inode));
97 return group;
98}
99
100
101
102
103
104
105
106
107
108static unsigned long
109nilfs_palloc_desc_blkoff(const struct inode *inode, unsigned long group)
110{
111 unsigned long desc_block =
112 group / nilfs_palloc_groups_per_desc_block(inode);
113 return desc_block * NILFS_MDT(inode)->mi_blocks_per_desc_block;
114}
115
116
117
118
119
120
121
122
123
124static unsigned long
125nilfs_palloc_bitmap_blkoff(const struct inode *inode, unsigned long group)
126{
127 unsigned long desc_offset =
128 group % nilfs_palloc_groups_per_desc_block(inode);
129 return nilfs_palloc_desc_blkoff(inode, group) + 1 +
130 desc_offset * NILFS_MDT(inode)->mi_blocks_per_group;
131}
132
133
134
135
136
137
138static unsigned long
139nilfs_palloc_group_desc_nfrees(const struct nilfs_palloc_group_desc *desc,
140 spinlock_t *lock)
141{
142 unsigned long nfree;
143
144 spin_lock(lock);
145 nfree = le32_to_cpu(desc->pg_nfrees);
146 spin_unlock(lock);
147 return nfree;
148}
149
150
151
152
153
154
155
156static u32
157nilfs_palloc_group_desc_add_entries(struct nilfs_palloc_group_desc *desc,
158 spinlock_t *lock, u32 n)
159{
160 u32 nfree;
161
162 spin_lock(lock);
163 le32_add_cpu(&desc->pg_nfrees, n);
164 nfree = le32_to_cpu(desc->pg_nfrees);
165 spin_unlock(lock);
166 return nfree;
167}
168
169
170
171
172
173
174static unsigned long
175nilfs_palloc_entry_blkoff(const struct inode *inode, __u64 nr)
176{
177 unsigned long group, group_offset;
178
179 group = nilfs_palloc_group(inode, nr, &group_offset);
180
181 return nilfs_palloc_bitmap_blkoff(inode, group) + 1 +
182 group_offset / NILFS_MDT(inode)->mi_entries_per_block;
183}
184
185
186
187
188
189
190
191static void nilfs_palloc_desc_block_init(struct inode *inode,
192 struct buffer_head *bh, void *kaddr)
193{
194 struct nilfs_palloc_group_desc *desc = kaddr + bh_offset(bh);
195 unsigned long n = nilfs_palloc_groups_per_desc_block(inode);
196 __le32 nfrees;
197
198 nfrees = cpu_to_le32(nilfs_palloc_entries_per_group(inode));
199 while (n-- > 0) {
200 desc->pg_nfrees = nfrees;
201 desc++;
202 }
203}
204
205static int nilfs_palloc_get_block(struct inode *inode, unsigned long blkoff,
206 int create,
207 void (*init_block)(struct inode *,
208 struct buffer_head *,
209 void *),
210 struct buffer_head **bhp,
211 struct nilfs_bh_assoc *prev,
212 spinlock_t *lock)
213{
214 int ret;
215
216 spin_lock(lock);
217 if (prev->bh && blkoff == prev->blkoff) {
218 get_bh(prev->bh);
219 *bhp = prev->bh;
220 spin_unlock(lock);
221 return 0;
222 }
223 spin_unlock(lock);
224
225 ret = nilfs_mdt_get_block(inode, blkoff, create, init_block, bhp);
226 if (!ret) {
227 spin_lock(lock);
228
229
230
231
232 brelse(prev->bh);
233 get_bh(*bhp);
234 prev->bh = *bhp;
235 prev->blkoff = blkoff;
236 spin_unlock(lock);
237 }
238 return ret;
239}
240
241
242
243
244
245
246
247
248static int nilfs_palloc_delete_block(struct inode *inode, unsigned long blkoff,
249 struct nilfs_bh_assoc *prev,
250 spinlock_t *lock)
251{
252 spin_lock(lock);
253 if (prev->bh && blkoff == prev->blkoff) {
254 brelse(prev->bh);
255 prev->bh = NULL;
256 }
257 spin_unlock(lock);
258 return nilfs_mdt_delete_block(inode, blkoff);
259}
260
261
262
263
264
265
266
267
268static int nilfs_palloc_get_desc_block(struct inode *inode,
269 unsigned long group,
270 int create, struct buffer_head **bhp)
271{
272 struct nilfs_palloc_cache *cache = NILFS_MDT(inode)->mi_palloc_cache;
273
274 return nilfs_palloc_get_block(inode,
275 nilfs_palloc_desc_blkoff(inode, group),
276 create, nilfs_palloc_desc_block_init,
277 bhp, &cache->prev_desc, &cache->lock);
278}
279
280
281
282
283
284
285
286
287static int nilfs_palloc_get_bitmap_block(struct inode *inode,
288 unsigned long group,
289 int create, struct buffer_head **bhp)
290{
291 struct nilfs_palloc_cache *cache = NILFS_MDT(inode)->mi_palloc_cache;
292
293 return nilfs_palloc_get_block(inode,
294 nilfs_palloc_bitmap_blkoff(inode, group),
295 create, NULL, bhp,
296 &cache->prev_bitmap, &cache->lock);
297}
298
299
300
301
302
303
304static int nilfs_palloc_delete_bitmap_block(struct inode *inode,
305 unsigned long group)
306{
307 struct nilfs_palloc_cache *cache = NILFS_MDT(inode)->mi_palloc_cache;
308
309 return nilfs_palloc_delete_block(inode,
310 nilfs_palloc_bitmap_blkoff(inode,
311 group),
312 &cache->prev_bitmap, &cache->lock);
313}
314
315
316
317
318
319
320
321
322int nilfs_palloc_get_entry_block(struct inode *inode, __u64 nr,
323 int create, struct buffer_head **bhp)
324{
325 struct nilfs_palloc_cache *cache = NILFS_MDT(inode)->mi_palloc_cache;
326
327 return nilfs_palloc_get_block(inode,
328 nilfs_palloc_entry_blkoff(inode, nr),
329 create, NULL, bhp,
330 &cache->prev_entry, &cache->lock);
331}
332
333
334
335
336
337
338static int nilfs_palloc_delete_entry_block(struct inode *inode, __u64 nr)
339{
340 struct nilfs_palloc_cache *cache = NILFS_MDT(inode)->mi_palloc_cache;
341
342 return nilfs_palloc_delete_block(inode,
343 nilfs_palloc_entry_blkoff(inode, nr),
344 &cache->prev_entry, &cache->lock);
345}
346
347
348
349
350
351
352
353
354static struct nilfs_palloc_group_desc *
355nilfs_palloc_block_get_group_desc(const struct inode *inode,
356 unsigned long group,
357 const struct buffer_head *bh, void *kaddr)
358{
359 return (struct nilfs_palloc_group_desc *)(kaddr + bh_offset(bh)) +
360 group % nilfs_palloc_groups_per_desc_block(inode);
361}
362
363
364
365
366
367
368
369
370void *nilfs_palloc_block_get_entry(const struct inode *inode, __u64 nr,
371 const struct buffer_head *bh, void *kaddr)
372{
373 unsigned long entry_offset, group_offset;
374
375 nilfs_palloc_group(inode, nr, &group_offset);
376 entry_offset = group_offset % NILFS_MDT(inode)->mi_entries_per_block;
377
378 return kaddr + bh_offset(bh) +
379 entry_offset * NILFS_MDT(inode)->mi_entry_size;
380}
381
382
383
384
385
386
387
388
389static int nilfs_palloc_find_available_slot(unsigned char *bitmap,
390 unsigned long target,
391 unsigned int bsize,
392 spinlock_t *lock)
393{
394 int pos, end = bsize;
395
396 if (likely(target < bsize)) {
397 pos = target;
398 do {
399 pos = nilfs_find_next_zero_bit(bitmap, end, pos);
400 if (pos >= end)
401 break;
402 if (!nilfs_set_bit_atomic(lock, pos, bitmap))
403 return pos;
404 } while (++pos < end);
405
406 end = target;
407 }
408
409
410 for (pos = 0; pos < end; pos++) {
411 pos = nilfs_find_next_zero_bit(bitmap, end, pos);
412 if (pos >= end)
413 break;
414 if (!nilfs_set_bit_atomic(lock, pos, bitmap))
415 return pos;
416 }
417
418 return -ENOSPC;
419}
420
421
422
423
424
425
426
427
428static unsigned long
429nilfs_palloc_rest_groups_in_desc_block(const struct inode *inode,
430 unsigned long curr, unsigned long max)
431{
432 return min_t(unsigned long,
433 nilfs_palloc_groups_per_desc_block(inode) -
434 curr % nilfs_palloc_groups_per_desc_block(inode),
435 max - curr + 1);
436}
437
438
439
440
441
442
443static int nilfs_palloc_count_desc_blocks(struct inode *inode,
444 unsigned long *desc_blocks)
445{
446 __u64 blknum;
447 int ret;
448
449 ret = nilfs_bmap_last_key(NILFS_I(inode)->i_bmap, &blknum);
450 if (likely(!ret))
451 *desc_blocks = DIV_ROUND_UP(
452 (unsigned long)blknum,
453 NILFS_MDT(inode)->mi_blocks_per_desc_block);
454 return ret;
455}
456
457
458
459
460
461
462
463static inline bool nilfs_palloc_mdt_file_can_grow(struct inode *inode,
464 unsigned long desc_blocks)
465{
466 return (nilfs_palloc_groups_per_desc_block(inode) * desc_blocks) <
467 nilfs_palloc_groups_count(inode);
468}
469
470
471
472
473
474
475
476
477int nilfs_palloc_count_max_entries(struct inode *inode, u64 nused, u64 *nmaxp)
478{
479 unsigned long desc_blocks = 0;
480 u64 entries_per_desc_block, nmax;
481 int err;
482
483 err = nilfs_palloc_count_desc_blocks(inode, &desc_blocks);
484 if (unlikely(err))
485 return err;
486
487 entries_per_desc_block = (u64)nilfs_palloc_entries_per_group(inode) *
488 nilfs_palloc_groups_per_desc_block(inode);
489 nmax = entries_per_desc_block * desc_blocks;
490
491 if (nused == nmax &&
492 nilfs_palloc_mdt_file_can_grow(inode, desc_blocks))
493 nmax += entries_per_desc_block;
494
495 if (nused > nmax)
496 return -ERANGE;
497
498 *nmaxp = nmax;
499 return 0;
500}
501
502
503
504
505
506
507int nilfs_palloc_prepare_alloc_entry(struct inode *inode,
508 struct nilfs_palloc_req *req)
509{
510 struct buffer_head *desc_bh, *bitmap_bh;
511 struct nilfs_palloc_group_desc *desc;
512 unsigned char *bitmap;
513 void *desc_kaddr, *bitmap_kaddr;
514 unsigned long group, maxgroup, ngroups;
515 unsigned long group_offset, maxgroup_offset;
516 unsigned long n, entries_per_group;
517 unsigned long i, j;
518 spinlock_t *lock;
519 int pos, ret;
520
521 ngroups = nilfs_palloc_groups_count(inode);
522 maxgroup = ngroups - 1;
523 group = nilfs_palloc_group(inode, req->pr_entry_nr, &group_offset);
524 entries_per_group = nilfs_palloc_entries_per_group(inode);
525
526 for (i = 0; i < ngroups; i += n) {
527 if (group >= ngroups) {
528
529 group = 0;
530 maxgroup = nilfs_palloc_group(inode, req->pr_entry_nr,
531 &maxgroup_offset) - 1;
532 }
533 ret = nilfs_palloc_get_desc_block(inode, group, 1, &desc_bh);
534 if (ret < 0)
535 return ret;
536 desc_kaddr = kmap(desc_bh->b_page);
537 desc = nilfs_palloc_block_get_group_desc(
538 inode, group, desc_bh, desc_kaddr);
539 n = nilfs_palloc_rest_groups_in_desc_block(inode, group,
540 maxgroup);
541 for (j = 0; j < n; j++, desc++, group++) {
542 lock = nilfs_mdt_bgl_lock(inode, group);
543 if (nilfs_palloc_group_desc_nfrees(desc, lock) > 0) {
544 ret = nilfs_palloc_get_bitmap_block(
545 inode, group, 1, &bitmap_bh);
546 if (ret < 0)
547 goto out_desc;
548 bitmap_kaddr = kmap(bitmap_bh->b_page);
549 bitmap = bitmap_kaddr + bh_offset(bitmap_bh);
550 pos = nilfs_palloc_find_available_slot(
551 bitmap, group_offset,
552 entries_per_group, lock);
553 if (pos >= 0) {
554
555 nilfs_palloc_group_desc_add_entries(
556 desc, lock, -1);
557 req->pr_entry_nr =
558 entries_per_group * group + pos;
559 kunmap(desc_bh->b_page);
560 kunmap(bitmap_bh->b_page);
561
562 req->pr_desc_bh = desc_bh;
563 req->pr_bitmap_bh = bitmap_bh;
564 return 0;
565 }
566 kunmap(bitmap_bh->b_page);
567 brelse(bitmap_bh);
568 }
569
570 group_offset = 0;
571 }
572
573 kunmap(desc_bh->b_page);
574 brelse(desc_bh);
575 }
576
577
578 return -ENOSPC;
579
580 out_desc:
581 kunmap(desc_bh->b_page);
582 brelse(desc_bh);
583 return ret;
584}
585
586
587
588
589
590
591void nilfs_palloc_commit_alloc_entry(struct inode *inode,
592 struct nilfs_palloc_req *req)
593{
594 mark_buffer_dirty(req->pr_bitmap_bh);
595 mark_buffer_dirty(req->pr_desc_bh);
596 nilfs_mdt_mark_dirty(inode);
597
598 brelse(req->pr_bitmap_bh);
599 brelse(req->pr_desc_bh);
600}
601
602
603
604
605
606
607void nilfs_palloc_commit_free_entry(struct inode *inode,
608 struct nilfs_palloc_req *req)
609{
610 struct nilfs_palloc_group_desc *desc;
611 unsigned long group, group_offset;
612 unsigned char *bitmap;
613 void *desc_kaddr, *bitmap_kaddr;
614 spinlock_t *lock;
615
616 group = nilfs_palloc_group(inode, req->pr_entry_nr, &group_offset);
617 desc_kaddr = kmap(req->pr_desc_bh->b_page);
618 desc = nilfs_palloc_block_get_group_desc(inode, group,
619 req->pr_desc_bh, desc_kaddr);
620 bitmap_kaddr = kmap(req->pr_bitmap_bh->b_page);
621 bitmap = bitmap_kaddr + bh_offset(req->pr_bitmap_bh);
622 lock = nilfs_mdt_bgl_lock(inode, group);
623
624 if (!nilfs_clear_bit_atomic(lock, group_offset, bitmap))
625 nilfs_msg(inode->i_sb, KERN_WARNING,
626 "%s (ino=%lu): entry number %llu already freed",
627 __func__, inode->i_ino,
628 (unsigned long long)req->pr_entry_nr);
629 else
630 nilfs_palloc_group_desc_add_entries(desc, lock, 1);
631
632 kunmap(req->pr_bitmap_bh->b_page);
633 kunmap(req->pr_desc_bh->b_page);
634
635 mark_buffer_dirty(req->pr_desc_bh);
636 mark_buffer_dirty(req->pr_bitmap_bh);
637 nilfs_mdt_mark_dirty(inode);
638
639 brelse(req->pr_bitmap_bh);
640 brelse(req->pr_desc_bh);
641}
642
643
644
645
646
647
648void nilfs_palloc_abort_alloc_entry(struct inode *inode,
649 struct nilfs_palloc_req *req)
650{
651 struct nilfs_palloc_group_desc *desc;
652 void *desc_kaddr, *bitmap_kaddr;
653 unsigned char *bitmap;
654 unsigned long group, group_offset;
655 spinlock_t *lock;
656
657 group = nilfs_palloc_group(inode, req->pr_entry_nr, &group_offset);
658 desc_kaddr = kmap(req->pr_desc_bh->b_page);
659 desc = nilfs_palloc_block_get_group_desc(inode, group,
660 req->pr_desc_bh, desc_kaddr);
661 bitmap_kaddr = kmap(req->pr_bitmap_bh->b_page);
662 bitmap = bitmap_kaddr + bh_offset(req->pr_bitmap_bh);
663 lock = nilfs_mdt_bgl_lock(inode, group);
664
665 if (!nilfs_clear_bit_atomic(lock, group_offset, bitmap))
666 nilfs_msg(inode->i_sb, KERN_WARNING,
667 "%s (ino=%lu): entry number %llu already freed",
668 __func__, inode->i_ino,
669 (unsigned long long)req->pr_entry_nr);
670 else
671 nilfs_palloc_group_desc_add_entries(desc, lock, 1);
672
673 kunmap(req->pr_bitmap_bh->b_page);
674 kunmap(req->pr_desc_bh->b_page);
675
676 brelse(req->pr_bitmap_bh);
677 brelse(req->pr_desc_bh);
678
679 req->pr_entry_nr = 0;
680 req->pr_bitmap_bh = NULL;
681 req->pr_desc_bh = NULL;
682}
683
684
685
686
687
688
689int nilfs_palloc_prepare_free_entry(struct inode *inode,
690 struct nilfs_palloc_req *req)
691{
692 struct buffer_head *desc_bh, *bitmap_bh;
693 unsigned long group, group_offset;
694 int ret;
695
696 group = nilfs_palloc_group(inode, req->pr_entry_nr, &group_offset);
697 ret = nilfs_palloc_get_desc_block(inode, group, 1, &desc_bh);
698 if (ret < 0)
699 return ret;
700 ret = nilfs_palloc_get_bitmap_block(inode, group, 1, &bitmap_bh);
701 if (ret < 0) {
702 brelse(desc_bh);
703 return ret;
704 }
705
706 req->pr_desc_bh = desc_bh;
707 req->pr_bitmap_bh = bitmap_bh;
708 return 0;
709}
710
711
712
713
714
715
716void nilfs_palloc_abort_free_entry(struct inode *inode,
717 struct nilfs_palloc_req *req)
718{
719 brelse(req->pr_bitmap_bh);
720 brelse(req->pr_desc_bh);
721
722 req->pr_entry_nr = 0;
723 req->pr_bitmap_bh = NULL;
724 req->pr_desc_bh = NULL;
725}
726
727
728
729
730
731
732
733int nilfs_palloc_freev(struct inode *inode, __u64 *entry_nrs, size_t nitems)
734{
735 struct buffer_head *desc_bh, *bitmap_bh;
736 struct nilfs_palloc_group_desc *desc;
737 unsigned char *bitmap;
738 void *desc_kaddr, *bitmap_kaddr;
739 unsigned long group, group_offset;
740 __u64 group_min_nr, last_nrs[8];
741 const unsigned long epg = nilfs_palloc_entries_per_group(inode);
742 const unsigned int epb = NILFS_MDT(inode)->mi_entries_per_block;
743 unsigned int entry_start, end, pos;
744 spinlock_t *lock;
745 int i, j, k, ret;
746 u32 nfree;
747
748 for (i = 0; i < nitems; i = j) {
749 int change_group = false;
750 int nempties = 0, n = 0;
751
752 group = nilfs_palloc_group(inode, entry_nrs[i], &group_offset);
753 ret = nilfs_palloc_get_desc_block(inode, group, 0, &desc_bh);
754 if (ret < 0)
755 return ret;
756 ret = nilfs_palloc_get_bitmap_block(inode, group, 0,
757 &bitmap_bh);
758 if (ret < 0) {
759 brelse(desc_bh);
760 return ret;
761 }
762
763
764 group_min_nr = (__u64)group * epg;
765
766 bitmap_kaddr = kmap(bitmap_bh->b_page);
767 bitmap = bitmap_kaddr + bh_offset(bitmap_bh);
768 lock = nilfs_mdt_bgl_lock(inode, group);
769
770 j = i;
771 entry_start = rounddown(group_offset, epb);
772 do {
773 if (!nilfs_clear_bit_atomic(lock, group_offset,
774 bitmap)) {
775 nilfs_msg(inode->i_sb, KERN_WARNING,
776 "%s (ino=%lu): entry number %llu already freed",
777 __func__, inode->i_ino,
778 (unsigned long long)entry_nrs[j]);
779 } else {
780 n++;
781 }
782
783 j++;
784 if (j >= nitems || entry_nrs[j] < group_min_nr ||
785 entry_nrs[j] >= group_min_nr + epg) {
786 change_group = true;
787 } else {
788 group_offset = entry_nrs[j] - group_min_nr;
789 if (group_offset >= entry_start &&
790 group_offset < entry_start + epb) {
791
792 continue;
793 }
794 }
795
796
797 end = entry_start + epb;
798 pos = nilfs_find_next_bit(bitmap, end, entry_start);
799 if (pos >= end) {
800 last_nrs[nempties++] = entry_nrs[j - 1];
801 if (nempties >= ARRAY_SIZE(last_nrs))
802 break;
803 }
804
805 if (change_group)
806 break;
807
808
809 entry_start = rounddown(group_offset, epb);
810 } while (true);
811
812 kunmap(bitmap_bh->b_page);
813 mark_buffer_dirty(bitmap_bh);
814 brelse(bitmap_bh);
815
816 for (k = 0; k < nempties; k++) {
817 ret = nilfs_palloc_delete_entry_block(inode,
818 last_nrs[k]);
819 if (ret && ret != -ENOENT)
820 nilfs_msg(inode->i_sb, KERN_WARNING,
821 "error %d deleting block that object (entry=%llu, ino=%lu) belongs to",
822 ret, (unsigned long long)last_nrs[k],
823 inode->i_ino);
824 }
825
826 desc_kaddr = kmap_atomic(desc_bh->b_page);
827 desc = nilfs_palloc_block_get_group_desc(
828 inode, group, desc_bh, desc_kaddr);
829 nfree = nilfs_palloc_group_desc_add_entries(desc, lock, n);
830 kunmap_atomic(desc_kaddr);
831 mark_buffer_dirty(desc_bh);
832 nilfs_mdt_mark_dirty(inode);
833 brelse(desc_bh);
834
835 if (nfree == nilfs_palloc_entries_per_group(inode)) {
836 ret = nilfs_palloc_delete_bitmap_block(inode, group);
837 if (ret && ret != -ENOENT)
838 nilfs_msg(inode->i_sb, KERN_WARNING,
839 "error %d deleting bitmap block of group=%lu, ino=%lu",
840 ret, group, inode->i_ino);
841 }
842 }
843 return 0;
844}
845
846void nilfs_palloc_setup_cache(struct inode *inode,
847 struct nilfs_palloc_cache *cache)
848{
849 NILFS_MDT(inode)->mi_palloc_cache = cache;
850 spin_lock_init(&cache->lock);
851}
852
853void nilfs_palloc_clear_cache(struct inode *inode)
854{
855 struct nilfs_palloc_cache *cache = NILFS_MDT(inode)->mi_palloc_cache;
856
857 spin_lock(&cache->lock);
858 brelse(cache->prev_desc.bh);
859 brelse(cache->prev_bitmap.bh);
860 brelse(cache->prev_entry.bh);
861 cache->prev_desc.bh = NULL;
862 cache->prev_bitmap.bh = NULL;
863 cache->prev_entry.bh = NULL;
864 spin_unlock(&cache->lock);
865}
866
867void nilfs_palloc_destroy_cache(struct inode *inode)
868{
869 nilfs_palloc_clear_cache(inode);
870 NILFS_MDT(inode)->mi_palloc_cache = NULL;
871}
872