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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"
23#include "trace.h"
24#include <trace/events/f2fs.h>
25
26static struct kmem_cache *ino_entry_slab;
27struct kmem_cache *inode_entry_slab;
28
29
30
31
32struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
33{
34 struct address_space *mapping = META_MAPPING(sbi);
35 struct page *page = NULL;
36repeat:
37 page = grab_cache_page(mapping, index);
38 if (!page) {
39 cond_resched();
40 goto repeat;
41 }
42 f2fs_wait_on_page_writeback(page, META);
43 SetPageUptodate(page);
44 return page;
45}
46
47
48
49
50struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
51{
52 struct address_space *mapping = META_MAPPING(sbi);
53 struct page *page;
54 struct f2fs_io_info fio = {
55 .type = META,
56 .rw = READ_SYNC | REQ_META | REQ_PRIO,
57 .blk_addr = index,
58 };
59repeat:
60 page = grab_cache_page(mapping, index);
61 if (!page) {
62 cond_resched();
63 goto repeat;
64 }
65 if (PageUptodate(page))
66 goto out;
67
68 if (f2fs_submit_page_bio(sbi, page, &fio))
69 goto repeat;
70
71 lock_page(page);
72 if (unlikely(page->mapping != mapping)) {
73 f2fs_put_page(page, 1);
74 goto repeat;
75 }
76out:
77 return page;
78}
79
80static inline bool is_valid_blkaddr(struct f2fs_sb_info *sbi,
81 block_t blkaddr, int type)
82{
83 switch (type) {
84 case META_NAT:
85 break;
86 case META_SIT:
87 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
88 return false;
89 break;
90 case META_SSA:
91 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
92 blkaddr < SM_I(sbi)->ssa_blkaddr))
93 return false;
94 break;
95 case META_CP:
96 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
97 blkaddr < __start_cp_addr(sbi)))
98 return false;
99 break;
100 case META_POR:
101 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
102 blkaddr < MAIN_BLKADDR(sbi)))
103 return false;
104 break;
105 default:
106 BUG();
107 }
108
109 return true;
110}
111
112
113
114
115int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages, int type)
116{
117 block_t prev_blk_addr = 0;
118 struct page *page;
119 block_t blkno = start;
120 struct f2fs_io_info fio = {
121 .type = META,
122 .rw = READ_SYNC | REQ_META | REQ_PRIO
123 };
124
125 for (; nrpages-- > 0; blkno++) {
126
127 if (!is_valid_blkaddr(sbi, blkno, type))
128 goto out;
129
130 switch (type) {
131 case META_NAT:
132 if (unlikely(blkno >=
133 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
134 blkno = 0;
135
136 fio.blk_addr = current_nat_addr(sbi,
137 blkno * NAT_ENTRY_PER_BLOCK);
138 break;
139 case META_SIT:
140
141 fio.blk_addr = current_sit_addr(sbi,
142 blkno * SIT_ENTRY_PER_BLOCK);
143 if (blkno != start && prev_blk_addr + 1 != fio.blk_addr)
144 goto out;
145 prev_blk_addr = fio.blk_addr;
146 break;
147 case META_SSA:
148 case META_CP:
149 case META_POR:
150 fio.blk_addr = blkno;
151 break;
152 default:
153 BUG();
154 }
155
156 page = grab_cache_page(META_MAPPING(sbi), fio.blk_addr);
157 if (!page)
158 continue;
159 if (PageUptodate(page)) {
160 f2fs_put_page(page, 1);
161 continue;
162 }
163
164 f2fs_submit_page_mbio(sbi, page, &fio);
165 f2fs_put_page(page, 0);
166 }
167out:
168 f2fs_submit_merged_bio(sbi, META, READ);
169 return blkno - start;
170}
171
172void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
173{
174 struct page *page;
175 bool readahead = false;
176
177 page = find_get_page(META_MAPPING(sbi), index);
178 if (!page || (page && !PageUptodate(page)))
179 readahead = true;
180 f2fs_put_page(page, 0);
181
182 if (readahead)
183 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR);
184}
185
186static int f2fs_write_meta_page(struct page *page,
187 struct writeback_control *wbc)
188{
189 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
190
191 trace_f2fs_writepage(page, META);
192
193 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
194 goto redirty_out;
195 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
196 goto redirty_out;
197 if (unlikely(f2fs_cp_error(sbi)))
198 goto redirty_out;
199
200 f2fs_wait_on_page_writeback(page, META);
201 write_meta_page(sbi, page);
202 dec_page_count(sbi, F2FS_DIRTY_META);
203 unlock_page(page);
204
205 if (wbc->for_reclaim)
206 f2fs_submit_merged_bio(sbi, META, WRITE);
207 return 0;
208
209redirty_out:
210 redirty_page_for_writepage(wbc, page);
211 return AOP_WRITEPAGE_ACTIVATE;
212}
213
214static int f2fs_write_meta_pages(struct address_space *mapping,
215 struct writeback_control *wbc)
216{
217 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
218 long diff, written;
219
220 trace_f2fs_writepages(mapping->host, wbc, META);
221
222
223 if (wbc->for_kupdate ||
224 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
225 goto skip_write;
226
227
228 mutex_lock(&sbi->cp_mutex);
229 diff = nr_pages_to_write(sbi, META, wbc);
230 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
231 mutex_unlock(&sbi->cp_mutex);
232 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
233 return 0;
234
235skip_write:
236 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
237 return 0;
238}
239
240long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
241 long nr_to_write)
242{
243 struct address_space *mapping = META_MAPPING(sbi);
244 pgoff_t index = 0, end = LONG_MAX;
245 struct pagevec pvec;
246 long nwritten = 0;
247 struct writeback_control wbc = {
248 .for_reclaim = 0,
249 };
250
251 pagevec_init(&pvec, 0);
252
253 while (index <= end) {
254 int i, nr_pages;
255 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
256 PAGECACHE_TAG_DIRTY,
257 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
258 if (unlikely(nr_pages == 0))
259 break;
260
261 for (i = 0; i < nr_pages; i++) {
262 struct page *page = pvec.pages[i];
263
264 lock_page(page);
265
266 if (unlikely(page->mapping != mapping)) {
267continue_unlock:
268 unlock_page(page);
269 continue;
270 }
271 if (!PageDirty(page)) {
272
273 goto continue_unlock;
274 }
275
276 if (!clear_page_dirty_for_io(page))
277 goto continue_unlock;
278
279 if (mapping->a_ops->writepage(page, &wbc)) {
280 unlock_page(page);
281 break;
282 }
283 nwritten++;
284 if (unlikely(nwritten >= nr_to_write))
285 break;
286 }
287 pagevec_release(&pvec);
288 cond_resched();
289 }
290
291 if (nwritten)
292 f2fs_submit_merged_bio(sbi, type, WRITE);
293
294 return nwritten;
295}
296
297static int f2fs_set_meta_page_dirty(struct page *page)
298{
299 trace_f2fs_set_page_dirty(page, META);
300
301 SetPageUptodate(page);
302 if (!PageDirty(page)) {
303 __set_page_dirty_nobuffers(page);
304 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
305 SetPagePrivate(page);
306 f2fs_trace_pid(page);
307 return 1;
308 }
309 return 0;
310}
311
312const struct address_space_operations f2fs_meta_aops = {
313 .writepage = f2fs_write_meta_page,
314 .writepages = f2fs_write_meta_pages,
315 .set_page_dirty = f2fs_set_meta_page_dirty,
316 .invalidatepage = f2fs_invalidate_page,
317 .releasepage = f2fs_release_page,
318};
319
320static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
321{
322 struct inode_management *im = &sbi->im[type];
323 struct ino_entry *e;
324retry:
325 if (radix_tree_preload(GFP_NOFS)) {
326 cond_resched();
327 goto retry;
328 }
329
330 spin_lock(&im->ino_lock);
331
332 e = radix_tree_lookup(&im->ino_root, ino);
333 if (!e) {
334 e = kmem_cache_alloc(ino_entry_slab, GFP_ATOMIC);
335 if (!e) {
336 spin_unlock(&im->ino_lock);
337 radix_tree_preload_end();
338 goto retry;
339 }
340 if (radix_tree_insert(&im->ino_root, ino, e)) {
341 spin_unlock(&im->ino_lock);
342 kmem_cache_free(ino_entry_slab, e);
343 radix_tree_preload_end();
344 goto retry;
345 }
346 memset(e, 0, sizeof(struct ino_entry));
347 e->ino = ino;
348
349 list_add_tail(&e->list, &im->ino_list);
350 if (type != ORPHAN_INO)
351 im->ino_num++;
352 }
353 spin_unlock(&im->ino_lock);
354 radix_tree_preload_end();
355}
356
357static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
358{
359 struct inode_management *im = &sbi->im[type];
360 struct ino_entry *e;
361
362 spin_lock(&im->ino_lock);
363 e = radix_tree_lookup(&im->ino_root, ino);
364 if (e) {
365 list_del(&e->list);
366 radix_tree_delete(&im->ino_root, ino);
367 im->ino_num--;
368 spin_unlock(&im->ino_lock);
369 kmem_cache_free(ino_entry_slab, e);
370 return;
371 }
372 spin_unlock(&im->ino_lock);
373}
374
375void add_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
376{
377
378 __add_ino_entry(sbi, ino, type);
379}
380
381void remove_dirty_inode(struct f2fs_sb_info *sbi, nid_t ino, int type)
382{
383
384 __remove_ino_entry(sbi, ino, type);
385}
386
387
388bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
389{
390 struct inode_management *im = &sbi->im[mode];
391 struct ino_entry *e;
392
393 spin_lock(&im->ino_lock);
394 e = radix_tree_lookup(&im->ino_root, ino);
395 spin_unlock(&im->ino_lock);
396 return e ? true : false;
397}
398
399void release_dirty_inode(struct f2fs_sb_info *sbi)
400{
401 struct ino_entry *e, *tmp;
402 int i;
403
404 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
405 struct inode_management *im = &sbi->im[i];
406
407 spin_lock(&im->ino_lock);
408 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
409 list_del(&e->list);
410 radix_tree_delete(&im->ino_root, e->ino);
411 kmem_cache_free(ino_entry_slab, e);
412 im->ino_num--;
413 }
414 spin_unlock(&im->ino_lock);
415 }
416}
417
418int acquire_orphan_inode(struct f2fs_sb_info *sbi)
419{
420 struct inode_management *im = &sbi->im[ORPHAN_INO];
421 int err = 0;
422
423 spin_lock(&im->ino_lock);
424 if (unlikely(im->ino_num >= sbi->max_orphans))
425 err = -ENOSPC;
426 else
427 im->ino_num++;
428 spin_unlock(&im->ino_lock);
429
430 return err;
431}
432
433void release_orphan_inode(struct f2fs_sb_info *sbi)
434{
435 struct inode_management *im = &sbi->im[ORPHAN_INO];
436
437 spin_lock(&im->ino_lock);
438 f2fs_bug_on(sbi, im->ino_num == 0);
439 im->ino_num--;
440 spin_unlock(&im->ino_lock);
441}
442
443void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
444{
445
446 __add_ino_entry(sbi, ino, ORPHAN_INO);
447}
448
449void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
450{
451
452 __remove_ino_entry(sbi, ino, ORPHAN_INO);
453}
454
455static void recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
456{
457 struct inode *inode = f2fs_iget(sbi->sb, ino);
458 f2fs_bug_on(sbi, IS_ERR(inode));
459 clear_nlink(inode);
460
461
462 iput(inode);
463}
464
465void recover_orphan_inodes(struct f2fs_sb_info *sbi)
466{
467 block_t start_blk, orphan_blocks, i, j;
468
469 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
470 return;
471
472 set_sbi_flag(sbi, SBI_POR_DOING);
473
474 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
475 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
476
477 ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP);
478
479 for (i = 0; i < orphan_blocks; i++) {
480 struct page *page = get_meta_page(sbi, start_blk + i);
481 struct f2fs_orphan_block *orphan_blk;
482
483 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
484 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
485 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
486 recover_orphan_inode(sbi, ino);
487 }
488 f2fs_put_page(page, 1);
489 }
490
491 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
492 clear_sbi_flag(sbi, SBI_POR_DOING);
493 return;
494}
495
496static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
497{
498 struct list_head *head;
499 struct f2fs_orphan_block *orphan_blk = NULL;
500 unsigned int nentries = 0;
501 unsigned short index;
502 unsigned short orphan_blocks;
503 struct page *page = NULL;
504 struct ino_entry *orphan = NULL;
505 struct inode_management *im = &sbi->im[ORPHAN_INO];
506
507 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
508
509 for (index = 0; index < orphan_blocks; index++)
510 grab_meta_page(sbi, start_blk + index);
511
512 index = 1;
513 spin_lock(&im->ino_lock);
514 head = &im->ino_list;
515
516
517 list_for_each_entry(orphan, head, list) {
518 if (!page) {
519 page = find_get_page(META_MAPPING(sbi), start_blk++);
520 f2fs_bug_on(sbi, !page);
521 orphan_blk =
522 (struct f2fs_orphan_block *)page_address(page);
523 memset(orphan_blk, 0, sizeof(*orphan_blk));
524 f2fs_put_page(page, 0);
525 }
526
527 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
528
529 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
530
531
532
533
534
535 orphan_blk->blk_addr = cpu_to_le16(index);
536 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
537 orphan_blk->entry_count = cpu_to_le32(nentries);
538 set_page_dirty(page);
539 f2fs_put_page(page, 1);
540 index++;
541 nentries = 0;
542 page = NULL;
543 }
544 }
545
546 if (page) {
547 orphan_blk->blk_addr = cpu_to_le16(index);
548 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
549 orphan_blk->entry_count = cpu_to_le32(nentries);
550 set_page_dirty(page);
551 f2fs_put_page(page, 1);
552 }
553
554 spin_unlock(&im->ino_lock);
555}
556
557static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
558 block_t cp_addr, unsigned long long *version)
559{
560 struct page *cp_page_1, *cp_page_2 = NULL;
561 unsigned long blk_size = sbi->blocksize;
562 struct f2fs_checkpoint *cp_block;
563 unsigned long long cur_version = 0, pre_version = 0;
564 size_t crc_offset;
565 __u32 crc = 0;
566
567
568 cp_page_1 = get_meta_page(sbi, cp_addr);
569
570
571 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
572 crc_offset = le32_to_cpu(cp_block->checksum_offset);
573 if (crc_offset >= blk_size)
574 goto invalid_cp1;
575
576 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
577 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
578 goto invalid_cp1;
579
580 pre_version = cur_cp_version(cp_block);
581
582
583 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
584 cp_page_2 = get_meta_page(sbi, cp_addr);
585
586 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
587 crc_offset = le32_to_cpu(cp_block->checksum_offset);
588 if (crc_offset >= blk_size)
589 goto invalid_cp2;
590
591 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
592 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
593 goto invalid_cp2;
594
595 cur_version = cur_cp_version(cp_block);
596
597 if (cur_version == pre_version) {
598 *version = cur_version;
599 f2fs_put_page(cp_page_2, 1);
600 return cp_page_1;
601 }
602invalid_cp2:
603 f2fs_put_page(cp_page_2, 1);
604invalid_cp1:
605 f2fs_put_page(cp_page_1, 1);
606 return NULL;
607}
608
609int get_valid_checkpoint(struct f2fs_sb_info *sbi)
610{
611 struct f2fs_checkpoint *cp_block;
612 struct f2fs_super_block *fsb = sbi->raw_super;
613 struct page *cp1, *cp2, *cur_page;
614 unsigned long blk_size = sbi->blocksize;
615 unsigned long long cp1_version = 0, cp2_version = 0;
616 unsigned long long cp_start_blk_no;
617 unsigned int cp_blks = 1 + __cp_payload(sbi);
618 block_t cp_blk_no;
619 int i;
620
621 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
622 if (!sbi->ckpt)
623 return -ENOMEM;
624
625
626
627
628 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
629 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
630
631
632 cp_start_blk_no += ((unsigned long long)1) <<
633 le32_to_cpu(fsb->log_blocks_per_seg);
634 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
635
636 if (cp1 && cp2) {
637 if (ver_after(cp2_version, cp1_version))
638 cur_page = cp2;
639 else
640 cur_page = cp1;
641 } else if (cp1) {
642 cur_page = cp1;
643 } else if (cp2) {
644 cur_page = cp2;
645 } else {
646 goto fail_no_cp;
647 }
648
649 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
650 memcpy(sbi->ckpt, cp_block, blk_size);
651
652 if (cp_blks <= 1)
653 goto done;
654
655 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
656 if (cur_page == cp2)
657 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
658
659 for (i = 1; i < cp_blks; i++) {
660 void *sit_bitmap_ptr;
661 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
662
663 cur_page = get_meta_page(sbi, cp_blk_no + i);
664 sit_bitmap_ptr = page_address(cur_page);
665 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
666 f2fs_put_page(cur_page, 1);
667 }
668done:
669 f2fs_put_page(cp1, 1);
670 f2fs_put_page(cp2, 1);
671 return 0;
672
673fail_no_cp:
674 kfree(sbi->ckpt);
675 return -EINVAL;
676}
677
678static int __add_dirty_inode(struct inode *inode, struct inode_entry *new)
679{
680 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
681
682 if (is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR))
683 return -EEXIST;
684
685 set_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
686 F2FS_I(inode)->dirty_dir = new;
687 list_add_tail(&new->list, &sbi->dir_inode_list);
688 stat_inc_dirty_dir(sbi);
689 return 0;
690}
691
692void update_dirty_page(struct inode *inode, struct page *page)
693{
694 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
695 struct inode_entry *new;
696 int ret = 0;
697
698 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode))
699 return;
700
701 if (!S_ISDIR(inode->i_mode)) {
702 inode_inc_dirty_pages(inode);
703 goto out;
704 }
705
706 new = f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
707 new->inode = inode;
708 INIT_LIST_HEAD(&new->list);
709
710 spin_lock(&sbi->dir_inode_lock);
711 ret = __add_dirty_inode(inode, new);
712 inode_inc_dirty_pages(inode);
713 spin_unlock(&sbi->dir_inode_lock);
714
715 if (ret)
716 kmem_cache_free(inode_entry_slab, new);
717out:
718 SetPagePrivate(page);
719 f2fs_trace_pid(page);
720}
721
722void add_dirty_dir_inode(struct inode *inode)
723{
724 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
725 struct inode_entry *new =
726 f2fs_kmem_cache_alloc(inode_entry_slab, GFP_NOFS);
727 int ret = 0;
728
729 new->inode = inode;
730 INIT_LIST_HEAD(&new->list);
731
732 spin_lock(&sbi->dir_inode_lock);
733 ret = __add_dirty_inode(inode, new);
734 spin_unlock(&sbi->dir_inode_lock);
735
736 if (ret)
737 kmem_cache_free(inode_entry_slab, new);
738}
739
740void remove_dirty_dir_inode(struct inode *inode)
741{
742 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
743 struct inode_entry *entry;
744
745 if (!S_ISDIR(inode->i_mode))
746 return;
747
748 spin_lock(&sbi->dir_inode_lock);
749 if (get_dirty_pages(inode) ||
750 !is_inode_flag_set(F2FS_I(inode), FI_DIRTY_DIR)) {
751 spin_unlock(&sbi->dir_inode_lock);
752 return;
753 }
754
755 entry = F2FS_I(inode)->dirty_dir;
756 list_del(&entry->list);
757 F2FS_I(inode)->dirty_dir = NULL;
758 clear_inode_flag(F2FS_I(inode), FI_DIRTY_DIR);
759 stat_dec_dirty_dir(sbi);
760 spin_unlock(&sbi->dir_inode_lock);
761 kmem_cache_free(inode_entry_slab, entry);
762
763
764 if (is_inode_flag_set(F2FS_I(inode), FI_DELAY_IPUT)) {
765 clear_inode_flag(F2FS_I(inode), FI_DELAY_IPUT);
766 iput(inode);
767 }
768}
769
770void sync_dirty_dir_inodes(struct f2fs_sb_info *sbi)
771{
772 struct list_head *head;
773 struct inode_entry *entry;
774 struct inode *inode;
775retry:
776 if (unlikely(f2fs_cp_error(sbi)))
777 return;
778
779 spin_lock(&sbi->dir_inode_lock);
780
781 head = &sbi->dir_inode_list;
782 if (list_empty(head)) {
783 spin_unlock(&sbi->dir_inode_lock);
784 return;
785 }
786 entry = list_entry(head->next, struct inode_entry, list);
787 inode = igrab(entry->inode);
788 spin_unlock(&sbi->dir_inode_lock);
789 if (inode) {
790 filemap_fdatawrite(inode->i_mapping);
791 iput(inode);
792 } else {
793
794
795
796
797 f2fs_submit_merged_bio(sbi, DATA, WRITE);
798 cond_resched();
799 }
800 goto retry;
801}
802
803
804
805
806static int block_operations(struct f2fs_sb_info *sbi)
807{
808 struct writeback_control wbc = {
809 .sync_mode = WB_SYNC_ALL,
810 .nr_to_write = LONG_MAX,
811 .for_reclaim = 0,
812 };
813 struct blk_plug plug;
814 int err = 0;
815
816 blk_start_plug(&plug);
817
818retry_flush_dents:
819 f2fs_lock_all(sbi);
820
821 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
822 f2fs_unlock_all(sbi);
823 sync_dirty_dir_inodes(sbi);
824 if (unlikely(f2fs_cp_error(sbi))) {
825 err = -EIO;
826 goto out;
827 }
828 goto retry_flush_dents;
829 }
830
831
832
833
834
835retry_flush_nodes:
836 down_write(&sbi->node_write);
837
838 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
839 up_write(&sbi->node_write);
840 sync_node_pages(sbi, 0, &wbc);
841 if (unlikely(f2fs_cp_error(sbi))) {
842 f2fs_unlock_all(sbi);
843 err = -EIO;
844 goto out;
845 }
846 goto retry_flush_nodes;
847 }
848out:
849 blk_finish_plug(&plug);
850 return err;
851}
852
853static void unblock_operations(struct f2fs_sb_info *sbi)
854{
855 up_write(&sbi->node_write);
856 f2fs_unlock_all(sbi);
857}
858
859static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
860{
861 DEFINE_WAIT(wait);
862
863 for (;;) {
864 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
865
866 if (!get_pages(sbi, F2FS_WRITEBACK))
867 break;
868
869 io_schedule();
870 }
871 finish_wait(&sbi->cp_wait, &wait);
872}
873
874static void do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
875{
876 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
877 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
878 struct f2fs_nm_info *nm_i = NM_I(sbi);
879 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
880 nid_t last_nid = nm_i->next_scan_nid;
881 block_t start_blk;
882 struct page *cp_page;
883 unsigned int data_sum_blocks, orphan_blocks;
884 __u32 crc32 = 0;
885 void *kaddr;
886 int i;
887 int cp_payload_blks = __cp_payload(sbi);
888
889
890
891
892
893 discard_next_dnode(sbi, NEXT_FREE_BLKADDR(sbi, curseg));
894
895
896 while (get_pages(sbi, F2FS_DIRTY_META)) {
897 sync_meta_pages(sbi, META, LONG_MAX);
898 if (unlikely(f2fs_cp_error(sbi)))
899 return;
900 }
901
902 next_free_nid(sbi, &last_nid);
903
904
905
906
907
908 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
909 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
910 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
911 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
912 ckpt->cur_node_segno[i] =
913 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
914 ckpt->cur_node_blkoff[i] =
915 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
916 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
917 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
918 }
919 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
920 ckpt->cur_data_segno[i] =
921 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
922 ckpt->cur_data_blkoff[i] =
923 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
924 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
925 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
926 }
927
928 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
929 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
930 ckpt->next_free_nid = cpu_to_le32(last_nid);
931
932
933 data_sum_blocks = npages_for_summary_flush(sbi, false);
934 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
935 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
936 else
937 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
938
939 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
940 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
941 orphan_blocks);
942
943 if (__remain_node_summaries(cpc->reason))
944 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
945 cp_payload_blks + data_sum_blocks +
946 orphan_blocks + NR_CURSEG_NODE_TYPE);
947 else
948 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
949 cp_payload_blks + data_sum_blocks +
950 orphan_blocks);
951
952 if (cpc->reason == CP_UMOUNT)
953 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
954 else
955 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
956
957 if (cpc->reason == CP_FASTBOOT)
958 set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
959 else
960 clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
961
962 if (orphan_num)
963 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
964 else
965 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
966
967 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
968 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
969
970
971 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
972 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
973
974 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
975 *((__le32 *)((unsigned char *)ckpt +
976 le32_to_cpu(ckpt->checksum_offset)))
977 = cpu_to_le32(crc32);
978
979 start_blk = __start_cp_addr(sbi);
980
981
982 cp_page = grab_meta_page(sbi, start_blk++);
983 kaddr = page_address(cp_page);
984 memcpy(kaddr, ckpt, F2FS_BLKSIZE);
985 set_page_dirty(cp_page);
986 f2fs_put_page(cp_page, 1);
987
988 for (i = 1; i < 1 + cp_payload_blks; i++) {
989 cp_page = grab_meta_page(sbi, start_blk++);
990 kaddr = page_address(cp_page);
991 memcpy(kaddr, (char *)ckpt + i * F2FS_BLKSIZE, F2FS_BLKSIZE);
992 set_page_dirty(cp_page);
993 f2fs_put_page(cp_page, 1);
994 }
995
996 if (orphan_num) {
997 write_orphan_inodes(sbi, start_blk);
998 start_blk += orphan_blocks;
999 }
1000
1001 write_data_summaries(sbi, start_blk);
1002 start_blk += data_sum_blocks;
1003 if (__remain_node_summaries(cpc->reason)) {
1004 write_node_summaries(sbi, start_blk);
1005 start_blk += NR_CURSEG_NODE_TYPE;
1006 }
1007
1008
1009 cp_page = grab_meta_page(sbi, start_blk);
1010 kaddr = page_address(cp_page);
1011 memcpy(kaddr, ckpt, F2FS_BLKSIZE);
1012 set_page_dirty(cp_page);
1013 f2fs_put_page(cp_page, 1);
1014
1015
1016 wait_on_all_pages_writeback(sbi);
1017
1018 if (unlikely(f2fs_cp_error(sbi)))
1019 return;
1020
1021 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
1022 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
1023
1024
1025 sbi->last_valid_block_count = sbi->total_valid_block_count;
1026 sbi->alloc_valid_block_count = 0;
1027
1028
1029 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
1030
1031
1032 wait_on_all_pages_writeback(sbi);
1033
1034 release_dirty_inode(sbi);
1035
1036 if (unlikely(f2fs_cp_error(sbi)))
1037 return;
1038
1039 clear_prefree_segments(sbi);
1040 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1041}
1042
1043
1044
1045
1046void write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1047{
1048 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1049 unsigned long long ckpt_ver;
1050
1051 mutex_lock(&sbi->cp_mutex);
1052
1053 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1054 (cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC))
1055 goto out;
1056 if (unlikely(f2fs_cp_error(sbi)))
1057 goto out;
1058 if (f2fs_readonly(sbi->sb))
1059 goto out;
1060
1061 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1062
1063 if (block_operations(sbi))
1064 goto out;
1065
1066 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1067
1068 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1069 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1070 f2fs_submit_merged_bio(sbi, META, WRITE);
1071
1072
1073
1074
1075
1076
1077 ckpt_ver = cur_cp_version(ckpt);
1078 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1079
1080
1081 flush_nat_entries(sbi);
1082 flush_sit_entries(sbi, cpc);
1083
1084
1085 do_checkpoint(sbi, cpc);
1086
1087 unblock_operations(sbi);
1088 stat_inc_cp_count(sbi->stat_info);
1089
1090 if (cpc->reason == CP_RECOVERY)
1091 f2fs_msg(sbi->sb, KERN_NOTICE,
1092 "checkpoint: version = %llx", ckpt_ver);
1093out:
1094 mutex_unlock(&sbi->cp_mutex);
1095 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1096}
1097
1098void init_ino_entry_info(struct f2fs_sb_info *sbi)
1099{
1100 int i;
1101
1102 for (i = 0; i < MAX_INO_ENTRY; i++) {
1103 struct inode_management *im = &sbi->im[i];
1104
1105 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1106 spin_lock_init(&im->ino_lock);
1107 INIT_LIST_HEAD(&im->ino_list);
1108 im->ino_num = 0;
1109 }
1110
1111 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1112 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1113 F2FS_ORPHANS_PER_BLOCK;
1114}
1115
1116int __init create_checkpoint_caches(void)
1117{
1118 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1119 sizeof(struct ino_entry));
1120 if (!ino_entry_slab)
1121 return -ENOMEM;
1122 inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1123 sizeof(struct inode_entry));
1124 if (!inode_entry_slab) {
1125 kmem_cache_destroy(ino_entry_slab);
1126 return -ENOMEM;
1127 }
1128 return 0;
1129}
1130
1131void destroy_checkpoint_caches(void)
1132{
1133 kmem_cache_destroy(ino_entry_slab);
1134 kmem_cache_destroy(inode_entry_slab);
1135}
1136
