Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
127e670a JK |
2 | * fs/f2fs/checkpoint.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/bio.h> | |
13 | #include <linux/mpage.h> | |
14 | #include <linux/writeback.h> | |
15 | #include <linux/blkdev.h> | |
16 | #include <linux/f2fs_fs.h> | |
17 | #include <linux/pagevec.h> | |
18 | #include <linux/swap.h> | |
19 | ||
20 | #include "f2fs.h" | |
21 | #include "node.h" | |
22 | #include "segment.h" | |
2af4bd6c | 23 | #include <trace/events/f2fs.h> |
127e670a JK |
24 | |
25 | static struct kmem_cache *orphan_entry_slab; | |
26 | static struct kmem_cache *inode_entry_slab; | |
27 | ||
0a8165d7 | 28 | /* |
127e670a JK |
29 | * We guarantee no failure on the returned page. |
30 | */ | |
31 | struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index) | |
32 | { | |
9df27d98 | 33 | struct address_space *mapping = META_MAPPING(sbi); |
127e670a JK |
34 | struct page *page = NULL; |
35 | repeat: | |
bde44686 | 36 | page = grab_cache_page(mapping, index); |
127e670a JK |
37 | if (!page) { |
38 | cond_resched(); | |
39 | goto repeat; | |
40 | } | |
bde44686 | 41 | f2fs_wait_on_page_writeback(page, META); |
127e670a JK |
42 | SetPageUptodate(page); |
43 | return page; | |
44 | } | |
45 | ||
0a8165d7 | 46 | /* |
127e670a JK |
47 | * We guarantee no failure on the returned page. |
48 | */ | |
49 | struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index) | |
50 | { | |
9df27d98 | 51 | struct address_space *mapping = META_MAPPING(sbi); |
127e670a JK |
52 | struct page *page; |
53 | repeat: | |
54 | page = grab_cache_page(mapping, index); | |
55 | if (!page) { | |
56 | cond_resched(); | |
57 | goto repeat; | |
58 | } | |
393ff91f JK |
59 | if (PageUptodate(page)) |
60 | goto out; | |
61 | ||
93dfe2ac JK |
62 | if (f2fs_submit_page_bio(sbi, page, index, |
63 | READ_SYNC | REQ_META | REQ_PRIO)) | |
127e670a | 64 | goto repeat; |
127e670a | 65 | |
393ff91f | 66 | lock_page(page); |
6bacf52f | 67 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
68 | f2fs_put_page(page, 1); |
69 | goto repeat; | |
70 | } | |
393ff91f | 71 | out: |
127e670a JK |
72 | return page; |
73 | } | |
74 | ||
b49ad51e | 75 | static inline int get_max_meta_blks(struct f2fs_sb_info *sbi, int type) |
662befda CY |
76 | { |
77 | switch (type) { | |
78 | case META_NAT: | |
79 | return NM_I(sbi)->max_nid / NAT_ENTRY_PER_BLOCK; | |
80 | case META_SIT: | |
81 | return SIT_BLK_CNT(sbi); | |
81c1a0f1 | 82 | case META_SSA: |
662befda CY |
83 | case META_CP: |
84 | return 0; | |
85 | default: | |
86 | BUG(); | |
87 | } | |
88 | } | |
89 | ||
90 | /* | |
81c1a0f1 | 91 | * Readahead CP/NAT/SIT/SSA pages |
662befda CY |
92 | */ |
93 | int ra_meta_pages(struct f2fs_sb_info *sbi, int start, int nrpages, int type) | |
94 | { | |
95 | block_t prev_blk_addr = 0; | |
96 | struct page *page; | |
97 | int blkno = start; | |
98 | int max_blks = get_max_meta_blks(sbi, type); | |
99 | ||
100 | struct f2fs_io_info fio = { | |
101 | .type = META, | |
102 | .rw = READ_SYNC | REQ_META | REQ_PRIO | |
103 | }; | |
104 | ||
105 | for (; nrpages-- > 0; blkno++) { | |
106 | block_t blk_addr; | |
107 | ||
108 | switch (type) { | |
109 | case META_NAT: | |
110 | /* get nat block addr */ | |
111 | if (unlikely(blkno >= max_blks)) | |
112 | blkno = 0; | |
113 | blk_addr = current_nat_addr(sbi, | |
114 | blkno * NAT_ENTRY_PER_BLOCK); | |
115 | break; | |
116 | case META_SIT: | |
117 | /* get sit block addr */ | |
118 | if (unlikely(blkno >= max_blks)) | |
119 | goto out; | |
120 | blk_addr = current_sit_addr(sbi, | |
121 | blkno * SIT_ENTRY_PER_BLOCK); | |
122 | if (blkno != start && prev_blk_addr + 1 != blk_addr) | |
123 | goto out; | |
124 | prev_blk_addr = blk_addr; | |
125 | break; | |
81c1a0f1 | 126 | case META_SSA: |
662befda | 127 | case META_CP: |
81c1a0f1 | 128 | /* get ssa/cp block addr */ |
662befda CY |
129 | blk_addr = blkno; |
130 | break; | |
131 | default: | |
132 | BUG(); | |
133 | } | |
134 | ||
135 | page = grab_cache_page(META_MAPPING(sbi), blk_addr); | |
136 | if (!page) | |
137 | continue; | |
138 | if (PageUptodate(page)) { | |
662befda CY |
139 | f2fs_put_page(page, 1); |
140 | continue; | |
141 | } | |
142 | ||
143 | f2fs_submit_page_mbio(sbi, page, blk_addr, &fio); | |
662befda CY |
144 | f2fs_put_page(page, 0); |
145 | } | |
146 | out: | |
147 | f2fs_submit_merged_bio(sbi, META, READ); | |
148 | return blkno - start; | |
149 | } | |
150 | ||
127e670a JK |
151 | static int f2fs_write_meta_page(struct page *page, |
152 | struct writeback_control *wbc) | |
153 | { | |
154 | struct inode *inode = page->mapping->host; | |
155 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
127e670a | 156 | |
ecda0de3 CY |
157 | trace_f2fs_writepage(page, META); |
158 | ||
203681f6 | 159 | if (unlikely(sbi->por_doing)) |
cfb271d4 | 160 | goto redirty_out; |
cfb271d4 CY |
161 | if (wbc->for_reclaim) |
162 | goto redirty_out; | |
127e670a | 163 | |
203681f6 JK |
164 | /* Should not write any meta pages, if any IO error was occurred */ |
165 | if (unlikely(is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ERROR_FLAG))) | |
166 | goto no_write; | |
127e670a | 167 | |
3cb5ad15 | 168 | f2fs_wait_on_page_writeback(page, META); |
577e3495 | 169 | write_meta_page(sbi, page); |
203681f6 | 170 | no_write: |
577e3495 JK |
171 | dec_page_count(sbi, F2FS_DIRTY_META); |
172 | unlock_page(page); | |
173 | return 0; | |
cfb271d4 CY |
174 | |
175 | redirty_out: | |
76f60268 | 176 | redirty_page_for_writepage(wbc, page); |
cfb271d4 | 177 | return AOP_WRITEPAGE_ACTIVATE; |
127e670a JK |
178 | } |
179 | ||
180 | static int f2fs_write_meta_pages(struct address_space *mapping, | |
181 | struct writeback_control *wbc) | |
182 | { | |
183 | struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); | |
50c8cdb3 | 184 | long diff, written; |
127e670a | 185 | |
e5748434 CY |
186 | trace_f2fs_writepages(mapping->host, wbc, META); |
187 | ||
5459aa97 | 188 | /* collect a number of dirty meta pages and write together */ |
50c8cdb3 JK |
189 | if (wbc->for_kupdate || |
190 | get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META)) | |
d3baf95d | 191 | goto skip_write; |
127e670a JK |
192 | |
193 | /* if mounting is failed, skip writing node pages */ | |
194 | mutex_lock(&sbi->cp_mutex); | |
50c8cdb3 JK |
195 | diff = nr_pages_to_write(sbi, META, wbc); |
196 | written = sync_meta_pages(sbi, META, wbc->nr_to_write); | |
127e670a | 197 | mutex_unlock(&sbi->cp_mutex); |
50c8cdb3 | 198 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff); |
127e670a | 199 | return 0; |
d3baf95d JK |
200 | |
201 | skip_write: | |
202 | wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META); | |
203 | return 0; | |
127e670a JK |
204 | } |
205 | ||
206 | long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type, | |
207 | long nr_to_write) | |
208 | { | |
9df27d98 | 209 | struct address_space *mapping = META_MAPPING(sbi); |
127e670a JK |
210 | pgoff_t index = 0, end = LONG_MAX; |
211 | struct pagevec pvec; | |
212 | long nwritten = 0; | |
213 | struct writeback_control wbc = { | |
214 | .for_reclaim = 0, | |
215 | }; | |
216 | ||
217 | pagevec_init(&pvec, 0); | |
218 | ||
219 | while (index <= end) { | |
220 | int i, nr_pages; | |
221 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, | |
222 | PAGECACHE_TAG_DIRTY, | |
223 | min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1); | |
cfb271d4 | 224 | if (unlikely(nr_pages == 0)) |
127e670a JK |
225 | break; |
226 | ||
227 | for (i = 0; i < nr_pages; i++) { | |
228 | struct page *page = pvec.pages[i]; | |
203681f6 | 229 | |
127e670a | 230 | lock_page(page); |
203681f6 JK |
231 | |
232 | if (unlikely(page->mapping != mapping)) { | |
233 | continue_unlock: | |
234 | unlock_page(page); | |
235 | continue; | |
236 | } | |
237 | if (!PageDirty(page)) { | |
238 | /* someone wrote it for us */ | |
239 | goto continue_unlock; | |
240 | } | |
241 | ||
242 | if (!clear_page_dirty_for_io(page)) | |
243 | goto continue_unlock; | |
244 | ||
577e3495 JK |
245 | if (f2fs_write_meta_page(page, &wbc)) { |
246 | unlock_page(page); | |
247 | break; | |
248 | } | |
cfb271d4 CY |
249 | nwritten++; |
250 | if (unlikely(nwritten >= nr_to_write)) | |
127e670a JK |
251 | break; |
252 | } | |
253 | pagevec_release(&pvec); | |
254 | cond_resched(); | |
255 | } | |
256 | ||
257 | if (nwritten) | |
458e6197 | 258 | f2fs_submit_merged_bio(sbi, type, WRITE); |
127e670a JK |
259 | |
260 | return nwritten; | |
261 | } | |
262 | ||
263 | static int f2fs_set_meta_page_dirty(struct page *page) | |
264 | { | |
265 | struct address_space *mapping = page->mapping; | |
266 | struct f2fs_sb_info *sbi = F2FS_SB(mapping->host->i_sb); | |
267 | ||
26c6b887 JK |
268 | trace_f2fs_set_page_dirty(page, META); |
269 | ||
127e670a JK |
270 | SetPageUptodate(page); |
271 | if (!PageDirty(page)) { | |
272 | __set_page_dirty_nobuffers(page); | |
273 | inc_page_count(sbi, F2FS_DIRTY_META); | |
127e670a JK |
274 | return 1; |
275 | } | |
276 | return 0; | |
277 | } | |
278 | ||
279 | const struct address_space_operations f2fs_meta_aops = { | |
280 | .writepage = f2fs_write_meta_page, | |
281 | .writepages = f2fs_write_meta_pages, | |
282 | .set_page_dirty = f2fs_set_meta_page_dirty, | |
283 | }; | |
284 | ||
cbd56e7d | 285 | int acquire_orphan_inode(struct f2fs_sb_info *sbi) |
127e670a | 286 | { |
127e670a JK |
287 | int err = 0; |
288 | ||
17b692f6 | 289 | spin_lock(&sbi->orphan_inode_lock); |
0d47c1ad | 290 | if (unlikely(sbi->n_orphans >= sbi->max_orphans)) |
127e670a | 291 | err = -ENOSPC; |
cbd56e7d JK |
292 | else |
293 | sbi->n_orphans++; | |
17b692f6 | 294 | spin_unlock(&sbi->orphan_inode_lock); |
0d47c1ad | 295 | |
127e670a JK |
296 | return err; |
297 | } | |
298 | ||
cbd56e7d JK |
299 | void release_orphan_inode(struct f2fs_sb_info *sbi) |
300 | { | |
17b692f6 | 301 | spin_lock(&sbi->orphan_inode_lock); |
5d56b671 | 302 | f2fs_bug_on(sbi->n_orphans == 0); |
cbd56e7d | 303 | sbi->n_orphans--; |
17b692f6 | 304 | spin_unlock(&sbi->orphan_inode_lock); |
cbd56e7d JK |
305 | } |
306 | ||
127e670a JK |
307 | void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) |
308 | { | |
2d7b822a CY |
309 | struct list_head *head; |
310 | struct orphan_inode_entry *new, *orphan; | |
127e670a | 311 | |
c1ef3725 GZ |
312 | new = f2fs_kmem_cache_alloc(orphan_entry_slab, GFP_ATOMIC); |
313 | new->ino = ino; | |
314 | ||
17b692f6 | 315 | spin_lock(&sbi->orphan_inode_lock); |
127e670a | 316 | head = &sbi->orphan_inode_list; |
2d7b822a | 317 | list_for_each_entry(orphan, head, list) { |
c1ef3725 | 318 | if (orphan->ino == ino) { |
17b692f6 | 319 | spin_unlock(&sbi->orphan_inode_lock); |
c1ef3725 GZ |
320 | kmem_cache_free(orphan_entry_slab, new); |
321 | return; | |
322 | } | |
323 | ||
127e670a JK |
324 | if (orphan->ino > ino) |
325 | break; | |
127e670a | 326 | } |
7bd59381 | 327 | |
2d7b822a CY |
328 | /* add new orphan entry into list which is sorted by inode number */ |
329 | list_add_tail(&new->list, &orphan->list); | |
17b692f6 | 330 | spin_unlock(&sbi->orphan_inode_lock); |
127e670a JK |
331 | } |
332 | ||
333 | void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) | |
334 | { | |
60ed9a0f | 335 | struct list_head *head; |
127e670a JK |
336 | struct orphan_inode_entry *orphan; |
337 | ||
17b692f6 | 338 | spin_lock(&sbi->orphan_inode_lock); |
127e670a | 339 | head = &sbi->orphan_inode_list; |
60ed9a0f | 340 | list_for_each_entry(orphan, head, list) { |
127e670a JK |
341 | if (orphan->ino == ino) { |
342 | list_del(&orphan->list); | |
5d56b671 | 343 | f2fs_bug_on(sbi->n_orphans == 0); |
127e670a | 344 | sbi->n_orphans--; |
cf0ee0f0 CY |
345 | spin_unlock(&sbi->orphan_inode_lock); |
346 | kmem_cache_free(orphan_entry_slab, orphan); | |
347 | return; | |
127e670a JK |
348 | } |
349 | } | |
17b692f6 | 350 | spin_unlock(&sbi->orphan_inode_lock); |
127e670a JK |
351 | } |
352 | ||
353 | static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino) | |
354 | { | |
355 | struct inode *inode = f2fs_iget(sbi->sb, ino); | |
5d56b671 | 356 | f2fs_bug_on(IS_ERR(inode)); |
127e670a JK |
357 | clear_nlink(inode); |
358 | ||
359 | /* truncate all the data during iput */ | |
360 | iput(inode); | |
361 | } | |
362 | ||
8f99a946 | 363 | void recover_orphan_inodes(struct f2fs_sb_info *sbi) |
127e670a JK |
364 | { |
365 | block_t start_blk, orphan_blkaddr, i, j; | |
366 | ||
25ca923b | 367 | if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG)) |
8f99a946 | 368 | return; |
127e670a | 369 | |
aabe5136 | 370 | sbi->por_doing = true; |
1dbe4152 CL |
371 | |
372 | start_blk = __start_cp_addr(sbi) + 1 + | |
373 | le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload); | |
127e670a JK |
374 | orphan_blkaddr = __start_sum_addr(sbi) - 1; |
375 | ||
662befda CY |
376 | ra_meta_pages(sbi, start_blk, orphan_blkaddr, META_CP); |
377 | ||
127e670a JK |
378 | for (i = 0; i < orphan_blkaddr; i++) { |
379 | struct page *page = get_meta_page(sbi, start_blk + i); | |
380 | struct f2fs_orphan_block *orphan_blk; | |
381 | ||
382 | orphan_blk = (struct f2fs_orphan_block *)page_address(page); | |
383 | for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) { | |
384 | nid_t ino = le32_to_cpu(orphan_blk->ino[j]); | |
385 | recover_orphan_inode(sbi, ino); | |
386 | } | |
387 | f2fs_put_page(page, 1); | |
388 | } | |
389 | /* clear Orphan Flag */ | |
25ca923b | 390 | clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG); |
aabe5136 | 391 | sbi->por_doing = false; |
8f99a946 | 392 | return; |
127e670a JK |
393 | } |
394 | ||
395 | static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk) | |
396 | { | |
502c6e0b | 397 | struct list_head *head; |
127e670a | 398 | struct f2fs_orphan_block *orphan_blk = NULL; |
127e670a | 399 | unsigned int nentries = 0; |
4531929e GZ |
400 | unsigned short index; |
401 | unsigned short orphan_blocks = (unsigned short)((sbi->n_orphans + | |
402 | (F2FS_ORPHANS_PER_BLOCK - 1)) / F2FS_ORPHANS_PER_BLOCK); | |
403 | struct page *page = NULL; | |
502c6e0b | 404 | struct orphan_inode_entry *orphan = NULL; |
127e670a | 405 | |
4531929e | 406 | for (index = 0; index < orphan_blocks; index++) |
63f5384c | 407 | grab_meta_page(sbi, start_blk + index); |
127e670a | 408 | |
4531929e | 409 | index = 1; |
17b692f6 | 410 | spin_lock(&sbi->orphan_inode_lock); |
127e670a JK |
411 | head = &sbi->orphan_inode_list; |
412 | ||
413 | /* loop for each orphan inode entry and write them in Jornal block */ | |
502c6e0b GZ |
414 | list_for_each_entry(orphan, head, list) { |
415 | if (!page) { | |
63f5384c GZ |
416 | page = find_get_page(META_MAPPING(sbi), start_blk++); |
417 | f2fs_bug_on(!page); | |
502c6e0b GZ |
418 | orphan_blk = |
419 | (struct f2fs_orphan_block *)page_address(page); | |
420 | memset(orphan_blk, 0, sizeof(*orphan_blk)); | |
63f5384c | 421 | f2fs_put_page(page, 0); |
502c6e0b | 422 | } |
127e670a | 423 | |
36795567 | 424 | orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino); |
127e670a | 425 | |
36795567 | 426 | if (nentries == F2FS_ORPHANS_PER_BLOCK) { |
127e670a JK |
427 | /* |
428 | * an orphan block is full of 1020 entries, | |
429 | * then we need to flush current orphan blocks | |
430 | * and bring another one in memory | |
431 | */ | |
432 | orphan_blk->blk_addr = cpu_to_le16(index); | |
433 | orphan_blk->blk_count = cpu_to_le16(orphan_blocks); | |
434 | orphan_blk->entry_count = cpu_to_le32(nentries); | |
435 | set_page_dirty(page); | |
436 | f2fs_put_page(page, 1); | |
437 | index++; | |
127e670a JK |
438 | nentries = 0; |
439 | page = NULL; | |
440 | } | |
502c6e0b | 441 | } |
127e670a | 442 | |
502c6e0b GZ |
443 | if (page) { |
444 | orphan_blk->blk_addr = cpu_to_le16(index); | |
445 | orphan_blk->blk_count = cpu_to_le16(orphan_blocks); | |
446 | orphan_blk->entry_count = cpu_to_le32(nentries); | |
447 | set_page_dirty(page); | |
448 | f2fs_put_page(page, 1); | |
127e670a | 449 | } |
502c6e0b | 450 | |
17b692f6 | 451 | spin_unlock(&sbi->orphan_inode_lock); |
127e670a JK |
452 | } |
453 | ||
454 | static struct page *validate_checkpoint(struct f2fs_sb_info *sbi, | |
455 | block_t cp_addr, unsigned long long *version) | |
456 | { | |
457 | struct page *cp_page_1, *cp_page_2 = NULL; | |
458 | unsigned long blk_size = sbi->blocksize; | |
459 | struct f2fs_checkpoint *cp_block; | |
460 | unsigned long long cur_version = 0, pre_version = 0; | |
127e670a | 461 | size_t crc_offset; |
7e586fa0 | 462 | __u32 crc = 0; |
127e670a JK |
463 | |
464 | /* Read the 1st cp block in this CP pack */ | |
465 | cp_page_1 = get_meta_page(sbi, cp_addr); | |
466 | ||
467 | /* get the version number */ | |
468 | cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1); | |
469 | crc_offset = le32_to_cpu(cp_block->checksum_offset); | |
470 | if (crc_offset >= blk_size) | |
471 | goto invalid_cp1; | |
472 | ||
7e586fa0 | 473 | crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset))); |
127e670a JK |
474 | if (!f2fs_crc_valid(crc, cp_block, crc_offset)) |
475 | goto invalid_cp1; | |
476 | ||
d71b5564 | 477 | pre_version = cur_cp_version(cp_block); |
127e670a JK |
478 | |
479 | /* Read the 2nd cp block in this CP pack */ | |
25ca923b | 480 | cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1; |
127e670a JK |
481 | cp_page_2 = get_meta_page(sbi, cp_addr); |
482 | ||
483 | cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2); | |
484 | crc_offset = le32_to_cpu(cp_block->checksum_offset); | |
485 | if (crc_offset >= blk_size) | |
486 | goto invalid_cp2; | |
487 | ||
7e586fa0 | 488 | crc = le32_to_cpu(*((__u32 *)((unsigned char *)cp_block + crc_offset))); |
127e670a JK |
489 | if (!f2fs_crc_valid(crc, cp_block, crc_offset)) |
490 | goto invalid_cp2; | |
491 | ||
d71b5564 | 492 | cur_version = cur_cp_version(cp_block); |
127e670a JK |
493 | |
494 | if (cur_version == pre_version) { | |
495 | *version = cur_version; | |
496 | f2fs_put_page(cp_page_2, 1); | |
497 | return cp_page_1; | |
498 | } | |
499 | invalid_cp2: | |
500 | f2fs_put_page(cp_page_2, 1); | |
501 | invalid_cp1: | |
502 | f2fs_put_page(cp_page_1, 1); | |
503 | return NULL; | |
504 | } | |
505 | ||
506 | int get_valid_checkpoint(struct f2fs_sb_info *sbi) | |
507 | { | |
508 | struct f2fs_checkpoint *cp_block; | |
509 | struct f2fs_super_block *fsb = sbi->raw_super; | |
510 | struct page *cp1, *cp2, *cur_page; | |
511 | unsigned long blk_size = sbi->blocksize; | |
512 | unsigned long long cp1_version = 0, cp2_version = 0; | |
513 | unsigned long long cp_start_blk_no; | |
1dbe4152 CL |
514 | unsigned int cp_blks = 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload); |
515 | block_t cp_blk_no; | |
516 | int i; | |
127e670a | 517 | |
1dbe4152 | 518 | sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL); |
127e670a JK |
519 | if (!sbi->ckpt) |
520 | return -ENOMEM; | |
521 | /* | |
522 | * Finding out valid cp block involves read both | |
523 | * sets( cp pack1 and cp pack 2) | |
524 | */ | |
525 | cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr); | |
526 | cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version); | |
527 | ||
528 | /* The second checkpoint pack should start at the next segment */ | |
f9a4e6df JK |
529 | cp_start_blk_no += ((unsigned long long)1) << |
530 | le32_to_cpu(fsb->log_blocks_per_seg); | |
127e670a JK |
531 | cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version); |
532 | ||
533 | if (cp1 && cp2) { | |
534 | if (ver_after(cp2_version, cp1_version)) | |
535 | cur_page = cp2; | |
536 | else | |
537 | cur_page = cp1; | |
538 | } else if (cp1) { | |
539 | cur_page = cp1; | |
540 | } else if (cp2) { | |
541 | cur_page = cp2; | |
542 | } else { | |
543 | goto fail_no_cp; | |
544 | } | |
545 | ||
546 | cp_block = (struct f2fs_checkpoint *)page_address(cur_page); | |
547 | memcpy(sbi->ckpt, cp_block, blk_size); | |
548 | ||
1dbe4152 CL |
549 | if (cp_blks <= 1) |
550 | goto done; | |
551 | ||
552 | cp_blk_no = le32_to_cpu(fsb->cp_blkaddr); | |
553 | if (cur_page == cp2) | |
554 | cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg); | |
555 | ||
556 | for (i = 1; i < cp_blks; i++) { | |
557 | void *sit_bitmap_ptr; | |
558 | unsigned char *ckpt = (unsigned char *)sbi->ckpt; | |
559 | ||
560 | cur_page = get_meta_page(sbi, cp_blk_no + i); | |
561 | sit_bitmap_ptr = page_address(cur_page); | |
562 | memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size); | |
563 | f2fs_put_page(cur_page, 1); | |
564 | } | |
565 | done: | |
127e670a JK |
566 | f2fs_put_page(cp1, 1); |
567 | f2fs_put_page(cp2, 1); | |
568 | return 0; | |
569 | ||
570 | fail_no_cp: | |
571 | kfree(sbi->ckpt); | |
572 | return -EINVAL; | |
573 | } | |
574 | ||
5deb8267 | 575 | static int __add_dirty_inode(struct inode *inode, struct dir_inode_entry *new) |
127e670a JK |
576 | { |
577 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
127e670a | 578 | |
ed57c27f JK |
579 | if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) |
580 | return -EEXIST; | |
2d7b822a | 581 | |
ed57c27f JK |
582 | set_inode_flag(F2FS_I(inode), FI_DIRTY_DIR); |
583 | F2FS_I(inode)->dirty_dir = new; | |
584 | list_add_tail(&new->list, &sbi->dir_inode_list); | |
dcdfff65 | 585 | stat_inc_dirty_dir(sbi); |
5deb8267 JK |
586 | return 0; |
587 | } | |
588 | ||
589 | void set_dirty_dir_page(struct inode *inode, struct page *page) | |
590 | { | |
591 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
592 | struct dir_inode_entry *new; | |
cf0ee0f0 | 593 | int ret = 0; |
5deb8267 | 594 | |
127e670a JK |
595 | if (!S_ISDIR(inode->i_mode)) |
596 | return; | |
7bd59381 GZ |
597 | |
598 | new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS); | |
127e670a JK |
599 | new->inode = inode; |
600 | INIT_LIST_HEAD(&new->list); | |
601 | ||
602 | spin_lock(&sbi->dir_inode_lock); | |
cf0ee0f0 | 603 | ret = __add_dirty_inode(inode, new); |
127e670a JK |
604 | inode_inc_dirty_dents(inode); |
605 | SetPagePrivate(page); | |
5deb8267 | 606 | spin_unlock(&sbi->dir_inode_lock); |
cf0ee0f0 CY |
607 | |
608 | if (ret) | |
609 | kmem_cache_free(inode_entry_slab, new); | |
5deb8267 JK |
610 | } |
611 | ||
612 | void add_dirty_dir_inode(struct inode *inode) | |
613 | { | |
614 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
7bd59381 GZ |
615 | struct dir_inode_entry *new = |
616 | f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS); | |
cf0ee0f0 | 617 | int ret = 0; |
7bd59381 | 618 | |
5deb8267 JK |
619 | new->inode = inode; |
620 | INIT_LIST_HEAD(&new->list); | |
127e670a | 621 | |
5deb8267 | 622 | spin_lock(&sbi->dir_inode_lock); |
cf0ee0f0 | 623 | ret = __add_dirty_inode(inode, new); |
127e670a | 624 | spin_unlock(&sbi->dir_inode_lock); |
cf0ee0f0 CY |
625 | |
626 | if (ret) | |
627 | kmem_cache_free(inode_entry_slab, new); | |
127e670a JK |
628 | } |
629 | ||
630 | void remove_dirty_dir_inode(struct inode *inode) | |
631 | { | |
632 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
2d7b822a | 633 | struct dir_inode_entry *entry; |
127e670a JK |
634 | |
635 | if (!S_ISDIR(inode->i_mode)) | |
636 | return; | |
637 | ||
638 | spin_lock(&sbi->dir_inode_lock); | |
ed57c27f JK |
639 | if (get_dirty_dents(inode) || |
640 | !is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) { | |
3b10b1fd JK |
641 | spin_unlock(&sbi->dir_inode_lock); |
642 | return; | |
643 | } | |
127e670a | 644 | |
ed57c27f JK |
645 | entry = F2FS_I(inode)->dirty_dir; |
646 | list_del(&entry->list); | |
647 | F2FS_I(inode)->dirty_dir = NULL; | |
648 | clear_inode_flag(F2FS_I(inode), FI_DIRTY_DIR); | |
649 | stat_dec_dirty_dir(sbi); | |
127e670a | 650 | spin_unlock(&sbi->dir_inode_lock); |
ed57c27f | 651 | kmem_cache_free(inode_entry_slab, entry); |
74d0b917 JK |
652 | |
653 | /* Only from the recovery routine */ | |
afc3eda2 JK |
654 | if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) { |
655 | clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT); | |
74d0b917 | 656 | iput(inode); |
afc3eda2 | 657 | } |
74d0b917 JK |
658 | } |
659 | ||
127e670a JK |
660 | void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi) |
661 | { | |
ce3b7d80 | 662 | struct list_head *head; |
127e670a JK |
663 | struct dir_inode_entry *entry; |
664 | struct inode *inode; | |
665 | retry: | |
666 | spin_lock(&sbi->dir_inode_lock); | |
ce3b7d80 GZ |
667 | |
668 | head = &sbi->dir_inode_list; | |
127e670a JK |
669 | if (list_empty(head)) { |
670 | spin_unlock(&sbi->dir_inode_lock); | |
671 | return; | |
672 | } | |
673 | entry = list_entry(head->next, struct dir_inode_entry, list); | |
674 | inode = igrab(entry->inode); | |
675 | spin_unlock(&sbi->dir_inode_lock); | |
676 | if (inode) { | |
87d6f890 | 677 | filemap_fdatawrite(inode->i_mapping); |
127e670a JK |
678 | iput(inode); |
679 | } else { | |
680 | /* | |
681 | * We should submit bio, since it exists several | |
682 | * wribacking dentry pages in the freeing inode. | |
683 | */ | |
458e6197 | 684 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
127e670a JK |
685 | } |
686 | goto retry; | |
687 | } | |
688 | ||
0a8165d7 | 689 | /* |
127e670a JK |
690 | * Freeze all the FS-operations for checkpoint. |
691 | */ | |
43727527 | 692 | static void block_operations(struct f2fs_sb_info *sbi) |
127e670a | 693 | { |
127e670a JK |
694 | struct writeback_control wbc = { |
695 | .sync_mode = WB_SYNC_ALL, | |
696 | .nr_to_write = LONG_MAX, | |
697 | .for_reclaim = 0, | |
698 | }; | |
c718379b JK |
699 | struct blk_plug plug; |
700 | ||
701 | blk_start_plug(&plug); | |
702 | ||
39936837 | 703 | retry_flush_dents: |
e479556b | 704 | f2fs_lock_all(sbi); |
127e670a | 705 | /* write all the dirty dentry pages */ |
127e670a | 706 | if (get_pages(sbi, F2FS_DIRTY_DENTS)) { |
e479556b | 707 | f2fs_unlock_all(sbi); |
39936837 JK |
708 | sync_dirty_dir_inodes(sbi); |
709 | goto retry_flush_dents; | |
127e670a JK |
710 | } |
711 | ||
127e670a JK |
712 | /* |
713 | * POR: we should ensure that there is no dirty node pages | |
714 | * until finishing nat/sit flush. | |
715 | */ | |
39936837 JK |
716 | retry_flush_nodes: |
717 | mutex_lock(&sbi->node_write); | |
127e670a JK |
718 | |
719 | if (get_pages(sbi, F2FS_DIRTY_NODES)) { | |
39936837 JK |
720 | mutex_unlock(&sbi->node_write); |
721 | sync_node_pages(sbi, 0, &wbc); | |
722 | goto retry_flush_nodes; | |
127e670a | 723 | } |
c718379b | 724 | blk_finish_plug(&plug); |
127e670a JK |
725 | } |
726 | ||
727 | static void unblock_operations(struct f2fs_sb_info *sbi) | |
728 | { | |
39936837 | 729 | mutex_unlock(&sbi->node_write); |
e479556b | 730 | f2fs_unlock_all(sbi); |
127e670a JK |
731 | } |
732 | ||
fb51b5ef CL |
733 | static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi) |
734 | { | |
735 | DEFINE_WAIT(wait); | |
736 | ||
737 | for (;;) { | |
738 | prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE); | |
739 | ||
740 | if (!get_pages(sbi, F2FS_WRITEBACK)) | |
741 | break; | |
742 | ||
743 | io_schedule(); | |
744 | } | |
745 | finish_wait(&sbi->cp_wait, &wait); | |
746 | } | |
747 | ||
127e670a JK |
748 | static void do_checkpoint(struct f2fs_sb_info *sbi, bool is_umount) |
749 | { | |
750 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
751 | nid_t last_nid = 0; | |
752 | block_t start_blk; | |
753 | struct page *cp_page; | |
754 | unsigned int data_sum_blocks, orphan_blocks; | |
7e586fa0 | 755 | __u32 crc32 = 0; |
127e670a | 756 | void *kaddr; |
127e670a | 757 | int i; |
1dbe4152 | 758 | int cp_payload_blks = le32_to_cpu(F2FS_RAW_SUPER(sbi)->cp_payload); |
127e670a | 759 | |
1e87a78d JK |
760 | /* |
761 | * This avoids to conduct wrong roll-forward operations and uses | |
762 | * metapages, so should be called prior to sync_meta_pages below. | |
763 | */ | |
764 | discard_next_dnode(sbi); | |
127e670a JK |
765 | |
766 | /* Flush all the NAT/SIT pages */ | |
767 | while (get_pages(sbi, F2FS_DIRTY_META)) | |
768 | sync_meta_pages(sbi, META, LONG_MAX); | |
769 | ||
770 | next_free_nid(sbi, &last_nid); | |
771 | ||
772 | /* | |
773 | * modify checkpoint | |
774 | * version number is already updated | |
775 | */ | |
776 | ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi)); | |
777 | ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi)); | |
778 | ckpt->free_segment_count = cpu_to_le32(free_segments(sbi)); | |
779 | for (i = 0; i < 3; i++) { | |
780 | ckpt->cur_node_segno[i] = | |
781 | cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE)); | |
782 | ckpt->cur_node_blkoff[i] = | |
783 | cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE)); | |
784 | ckpt->alloc_type[i + CURSEG_HOT_NODE] = | |
785 | curseg_alloc_type(sbi, i + CURSEG_HOT_NODE); | |
786 | } | |
787 | for (i = 0; i < 3; i++) { | |
788 | ckpt->cur_data_segno[i] = | |
789 | cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA)); | |
790 | ckpt->cur_data_blkoff[i] = | |
791 | cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA)); | |
792 | ckpt->alloc_type[i + CURSEG_HOT_DATA] = | |
793 | curseg_alloc_type(sbi, i + CURSEG_HOT_DATA); | |
794 | } | |
795 | ||
796 | ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi)); | |
797 | ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi)); | |
798 | ckpt->next_free_nid = cpu_to_le32(last_nid); | |
799 | ||
800 | /* 2 cp + n data seg summary + orphan inode blocks */ | |
801 | data_sum_blocks = npages_for_summary_flush(sbi); | |
802 | if (data_sum_blocks < 3) | |
25ca923b | 803 | set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG); |
127e670a | 804 | else |
25ca923b | 805 | clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG); |
127e670a JK |
806 | |
807 | orphan_blocks = (sbi->n_orphans + F2FS_ORPHANS_PER_BLOCK - 1) | |
808 | / F2FS_ORPHANS_PER_BLOCK; | |
1dbe4152 CL |
809 | ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks + |
810 | orphan_blocks); | |
127e670a JK |
811 | |
812 | if (is_umount) { | |
25ca923b JK |
813 | set_ckpt_flags(ckpt, CP_UMOUNT_FLAG); |
814 | ckpt->cp_pack_total_block_count = cpu_to_le32(2 + | |
1dbe4152 CL |
815 | cp_payload_blks + data_sum_blocks + |
816 | orphan_blocks + NR_CURSEG_NODE_TYPE); | |
127e670a | 817 | } else { |
25ca923b JK |
818 | clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG); |
819 | ckpt->cp_pack_total_block_count = cpu_to_le32(2 + | |
1dbe4152 CL |
820 | cp_payload_blks + data_sum_blocks + |
821 | orphan_blocks); | |
127e670a JK |
822 | } |
823 | ||
824 | if (sbi->n_orphans) | |
25ca923b | 825 | set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG); |
127e670a | 826 | else |
25ca923b | 827 | clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG); |
127e670a JK |
828 | |
829 | /* update SIT/NAT bitmap */ | |
830 | get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP)); | |
831 | get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP)); | |
832 | ||
833 | crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset)); | |
7e586fa0 JK |
834 | *((__le32 *)((unsigned char *)ckpt + |
835 | le32_to_cpu(ckpt->checksum_offset))) | |
127e670a JK |
836 | = cpu_to_le32(crc32); |
837 | ||
838 | start_blk = __start_cp_addr(sbi); | |
839 | ||
840 | /* write out checkpoint buffer at block 0 */ | |
841 | cp_page = grab_meta_page(sbi, start_blk++); | |
842 | kaddr = page_address(cp_page); | |
843 | memcpy(kaddr, ckpt, (1 << sbi->log_blocksize)); | |
844 | set_page_dirty(cp_page); | |
845 | f2fs_put_page(cp_page, 1); | |
846 | ||
1dbe4152 CL |
847 | for (i = 1; i < 1 + cp_payload_blks; i++) { |
848 | cp_page = grab_meta_page(sbi, start_blk++); | |
849 | kaddr = page_address(cp_page); | |
850 | memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE, | |
851 | (1 << sbi->log_blocksize)); | |
852 | set_page_dirty(cp_page); | |
853 | f2fs_put_page(cp_page, 1); | |
854 | } | |
855 | ||
127e670a JK |
856 | if (sbi->n_orphans) { |
857 | write_orphan_inodes(sbi, start_blk); | |
858 | start_blk += orphan_blocks; | |
859 | } | |
860 | ||
861 | write_data_summaries(sbi, start_blk); | |
862 | start_blk += data_sum_blocks; | |
863 | if (is_umount) { | |
864 | write_node_summaries(sbi, start_blk); | |
865 | start_blk += NR_CURSEG_NODE_TYPE; | |
866 | } | |
867 | ||
868 | /* writeout checkpoint block */ | |
869 | cp_page = grab_meta_page(sbi, start_blk); | |
870 | kaddr = page_address(cp_page); | |
871 | memcpy(kaddr, ckpt, (1 << sbi->log_blocksize)); | |
872 | set_page_dirty(cp_page); | |
873 | f2fs_put_page(cp_page, 1); | |
874 | ||
875 | /* wait for previous submitted node/meta pages writeback */ | |
fb51b5ef | 876 | wait_on_all_pages_writeback(sbi); |
127e670a | 877 | |
4ef51a8f | 878 | filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX); |
9df27d98 | 879 | filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX); |
127e670a JK |
880 | |
881 | /* update user_block_counts */ | |
882 | sbi->last_valid_block_count = sbi->total_valid_block_count; | |
883 | sbi->alloc_valid_block_count = 0; | |
884 | ||
885 | /* Here, we only have one bio having CP pack */ | |
577e3495 | 886 | sync_meta_pages(sbi, META_FLUSH, LONG_MAX); |
127e670a | 887 | |
6bacf52f | 888 | if (unlikely(!is_set_ckpt_flags(ckpt, CP_ERROR_FLAG))) { |
577e3495 JK |
889 | clear_prefree_segments(sbi); |
890 | F2FS_RESET_SB_DIRT(sbi); | |
891 | } | |
127e670a JK |
892 | } |
893 | ||
0a8165d7 | 894 | /* |
127e670a JK |
895 | * We guarantee that this checkpoint procedure should not fail. |
896 | */ | |
43727527 | 897 | void write_checkpoint(struct f2fs_sb_info *sbi, bool is_umount) |
127e670a JK |
898 | { |
899 | struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi); | |
900 | unsigned long long ckpt_ver; | |
901 | ||
2af4bd6c NJ |
902 | trace_f2fs_write_checkpoint(sbi->sb, is_umount, "start block_ops"); |
903 | ||
43727527 JK |
904 | mutex_lock(&sbi->cp_mutex); |
905 | block_operations(sbi); | |
127e670a | 906 | |
2af4bd6c NJ |
907 | trace_f2fs_write_checkpoint(sbi->sb, is_umount, "finish block_ops"); |
908 | ||
458e6197 JK |
909 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
910 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
911 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
127e670a JK |
912 | |
913 | /* | |
914 | * update checkpoint pack index | |
915 | * Increase the version number so that | |
916 | * SIT entries and seg summaries are written at correct place | |
917 | */ | |
d71b5564 | 918 | ckpt_ver = cur_cp_version(ckpt); |
127e670a JK |
919 | ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver); |
920 | ||
921 | /* write cached NAT/SIT entries to NAT/SIT area */ | |
922 | flush_nat_entries(sbi); | |
923 | flush_sit_entries(sbi); | |
924 | ||
127e670a JK |
925 | /* unlock all the fs_lock[] in do_checkpoint() */ |
926 | do_checkpoint(sbi, is_umount); | |
927 | ||
928 | unblock_operations(sbi); | |
929 | mutex_unlock(&sbi->cp_mutex); | |
2af4bd6c | 930 | |
942e0be6 | 931 | stat_inc_cp_count(sbi->stat_info); |
2af4bd6c | 932 | trace_f2fs_write_checkpoint(sbi->sb, is_umount, "finish checkpoint"); |
127e670a JK |
933 | } |
934 | ||
935 | void init_orphan_info(struct f2fs_sb_info *sbi) | |
936 | { | |
17b692f6 | 937 | spin_lock_init(&sbi->orphan_inode_lock); |
127e670a JK |
938 | INIT_LIST_HEAD(&sbi->orphan_inode_list); |
939 | sbi->n_orphans = 0; | |
0d47c1ad GZ |
940 | /* |
941 | * considering 512 blocks in a segment 8 blocks are needed for cp | |
942 | * and log segment summaries. Remaining blocks are used to keep | |
943 | * orphan entries with the limitation one reserved segment | |
944 | * for cp pack we can have max 1020*504 orphan entries | |
945 | */ | |
946 | sbi->max_orphans = (sbi->blocks_per_seg - 2 - NR_CURSEG_TYPE) | |
947 | * F2FS_ORPHANS_PER_BLOCK; | |
127e670a JK |
948 | } |
949 | ||
6e6093a8 | 950 | int __init create_checkpoint_caches(void) |
127e670a JK |
951 | { |
952 | orphan_entry_slab = f2fs_kmem_cache_create("f2fs_orphan_entry", | |
e8512d2e | 953 | sizeof(struct orphan_inode_entry)); |
6bacf52f | 954 | if (!orphan_entry_slab) |
127e670a JK |
955 | return -ENOMEM; |
956 | inode_entry_slab = f2fs_kmem_cache_create("f2fs_dirty_dir_entry", | |
e8512d2e | 957 | sizeof(struct dir_inode_entry)); |
6bacf52f | 958 | if (!inode_entry_slab) { |
127e670a JK |
959 | kmem_cache_destroy(orphan_entry_slab); |
960 | return -ENOMEM; | |
961 | } | |
962 | return 0; | |
963 | } | |
964 | ||
965 | void destroy_checkpoint_caches(void) | |
966 | { | |
967 | kmem_cache_destroy(orphan_entry_slab); | |
968 | kmem_cache_destroy(inode_entry_slab); | |
969 | } |