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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
50static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
51 bool is_meta)
52{
53 struct address_space *mapping = META_MAPPING(sbi);
54 struct page *page;
55 struct f2fs_io_info fio = {
56 .sbi = sbi,
57 .type = META,
58 .rw = READ_SYNC | REQ_META | REQ_PRIO,
59 .blk_addr = index,
60 .encrypted_page = NULL,
61 };
62
63 if (unlikely(!is_meta))
64 fio.rw &= ~REQ_META;
65repeat:
66 page = grab_cache_page(mapping, index);
67 if (!page) {
68 cond_resched();
69 goto repeat;
70 }
71 if (PageUptodate(page))
72 goto out;
73
74 fio.page = page;
75
76 if (f2fs_submit_page_bio(&fio)) {
77 f2fs_put_page(page, 1);
78 goto repeat;
79 }
80
81 lock_page(page);
82 if (unlikely(page->mapping != mapping)) {
83 f2fs_put_page(page, 1);
84 goto repeat;
85 }
86
87
88
89
90
91
92 if (unlikely(!PageUptodate(page)))
93 f2fs_stop_checkpoint(sbi);
94out:
95 return page;
96}
97
98struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
99{
100 return __get_meta_page(sbi, index, true);
101}
102
103
104struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
105{
106 return __get_meta_page(sbi, index, false);
107}
108
109bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
110{
111 switch (type) {
112 case META_NAT:
113 break;
114 case META_SIT:
115 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
116 return false;
117 break;
118 case META_SSA:
119 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
120 blkaddr < SM_I(sbi)->ssa_blkaddr))
121 return false;
122 break;
123 case META_CP:
124 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
125 blkaddr < __start_cp_addr(sbi)))
126 return false;
127 break;
128 case META_POR:
129 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
130 blkaddr < MAIN_BLKADDR(sbi)))
131 return false;
132 break;
133 default:
134 BUG();
135 }
136
137 return true;
138}
139
140
141
142
143int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
144 int type, bool sync)
145{
146 block_t prev_blk_addr = 0;
147 struct page *page;
148 block_t blkno = start;
149 struct f2fs_io_info fio = {
150 .sbi = sbi,
151 .type = META,
152 .rw = sync ? (READ_SYNC | REQ_META | REQ_PRIO) : READA,
153 .encrypted_page = NULL,
154 };
155
156 if (unlikely(type == META_POR))
157 fio.rw &= ~REQ_META;
158
159 for (; nrpages-- > 0; blkno++) {
160
161 if (!is_valid_blkaddr(sbi, blkno, type))
162 goto out;
163
164 switch (type) {
165 case META_NAT:
166 if (unlikely(blkno >=
167 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
168 blkno = 0;
169
170 fio.blk_addr = current_nat_addr(sbi,
171 blkno * NAT_ENTRY_PER_BLOCK);
172 break;
173 case META_SIT:
174
175 fio.blk_addr = current_sit_addr(sbi,
176 blkno * SIT_ENTRY_PER_BLOCK);
177 if (blkno != start && prev_blk_addr + 1 != fio.blk_addr)
178 goto out;
179 prev_blk_addr = fio.blk_addr;
180 break;
181 case META_SSA:
182 case META_CP:
183 case META_POR:
184 fio.blk_addr = blkno;
185 break;
186 default:
187 BUG();
188 }
189
190 page = grab_cache_page(META_MAPPING(sbi), fio.blk_addr);
191 if (!page)
192 continue;
193 if (PageUptodate(page)) {
194 f2fs_put_page(page, 1);
195 continue;
196 }
197
198 fio.page = page;
199 f2fs_submit_page_mbio(&fio);
200 f2fs_put_page(page, 0);
201 }
202out:
203 f2fs_submit_merged_bio(sbi, META, READ);
204 return blkno - start;
205}
206
207void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
208{
209 struct page *page;
210 bool readahead = false;
211
212 page = find_get_page(META_MAPPING(sbi), index);
213 if (!page || (page && !PageUptodate(page)))
214 readahead = true;
215 f2fs_put_page(page, 0);
216
217 if (readahead)
218 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR, true);
219}
220
221static int f2fs_write_meta_page(struct page *page,
222 struct writeback_control *wbc)
223{
224 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
225
226 trace_f2fs_writepage(page, META);
227
228 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
229 goto redirty_out;
230 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
231 goto redirty_out;
232 if (unlikely(f2fs_cp_error(sbi)))
233 goto redirty_out;
234
235 f2fs_wait_on_page_writeback(page, META);
236 write_meta_page(sbi, page);
237 dec_page_count(sbi, F2FS_DIRTY_META);
238 unlock_page(page);
239
240 if (wbc->for_reclaim || unlikely(f2fs_cp_error(sbi)))
241 f2fs_submit_merged_bio(sbi, META, WRITE);
242 return 0;
243
244redirty_out:
245 redirty_page_for_writepage(wbc, page);
246 return AOP_WRITEPAGE_ACTIVATE;
247}
248
249static int f2fs_write_meta_pages(struct address_space *mapping,
250 struct writeback_control *wbc)
251{
252 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
253 long diff, written;
254
255 trace_f2fs_writepages(mapping->host, wbc, META);
256
257
258 if (wbc->for_kupdate ||
259 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
260 goto skip_write;
261
262
263 mutex_lock(&sbi->cp_mutex);
264 diff = nr_pages_to_write(sbi, META, wbc);
265 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
266 mutex_unlock(&sbi->cp_mutex);
267 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
268 return 0;
269
270skip_write:
271 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
272 return 0;
273}
274
275long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
276 long nr_to_write)
277{
278 struct address_space *mapping = META_MAPPING(sbi);
279 pgoff_t index = 0, end = LONG_MAX, prev = LONG_MAX;
280 struct pagevec pvec;
281 long nwritten = 0;
282 struct writeback_control wbc = {
283 .for_reclaim = 0,
284 };
285
286 pagevec_init(&pvec, 0);
287
288 while (index <= end) {
289 int i, nr_pages;
290 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
291 PAGECACHE_TAG_DIRTY,
292 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
293 if (unlikely(nr_pages == 0))
294 break;
295
296 for (i = 0; i < nr_pages; i++) {
297 struct page *page = pvec.pages[i];
298
299 if (prev == LONG_MAX)
300 prev = page->index - 1;
301 if (nr_to_write != LONG_MAX && page->index != prev + 1) {
302 pagevec_release(&pvec);
303 goto stop;
304 }
305
306 lock_page(page);
307
308 if (unlikely(page->mapping != mapping)) {
309continue_unlock:
310 unlock_page(page);
311 continue;
312 }
313 if (!PageDirty(page)) {
314
315 goto continue_unlock;
316 }
317
318 if (!clear_page_dirty_for_io(page))
319 goto continue_unlock;
320
321 if (mapping->a_ops->writepage(page, &wbc)) {
322 unlock_page(page);
323 break;
324 }
325 nwritten++;
326 prev = page->index;
327 if (unlikely(nwritten >= nr_to_write))
328 break;
329 }
330 pagevec_release(&pvec);
331 cond_resched();
332 }
333stop:
334 if (nwritten)
335 f2fs_submit_merged_bio(sbi, type, WRITE);
336
337 return nwritten;
338}
339
340static int f2fs_set_meta_page_dirty(struct page *page)
341{
342 trace_f2fs_set_page_dirty(page, META);
343
344 SetPageUptodate(page);
345 if (!PageDirty(page)) {
346 __set_page_dirty_nobuffers(page);
347 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
348 SetPagePrivate(page);
349 f2fs_trace_pid(page);
350 return 1;
351 }
352 return 0;
353}
354
355const struct address_space_operations f2fs_meta_aops = {
356 .writepage = f2fs_write_meta_page,
357 .writepages = f2fs_write_meta_pages,
358 .set_page_dirty = f2fs_set_meta_page_dirty,
359 .invalidatepage = f2fs_invalidate_page,
360 .releasepage = f2fs_release_page,
361};
362
363static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
364{
365 struct inode_management *im = &sbi->im[type];
366 struct ino_entry *e, *tmp;
367
368 tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
369retry:
370 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
371
372 spin_lock(&im->ino_lock);
373 e = radix_tree_lookup(&im->ino_root, ino);
374 if (!e) {
375 e = tmp;
376 if (radix_tree_insert(&im->ino_root, ino, e)) {
377 spin_unlock(&im->ino_lock);
378 radix_tree_preload_end();
379 goto retry;
380 }
381 memset(e, 0, sizeof(struct ino_entry));
382 e->ino = ino;
383
384 list_add_tail(&e->list, &im->ino_list);
385 if (type != ORPHAN_INO)
386 im->ino_num++;
387 }
388 spin_unlock(&im->ino_lock);
389 radix_tree_preload_end();
390
391 if (e != tmp)
392 kmem_cache_free(ino_entry_slab, tmp);
393}
394
395static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
396{
397 struct inode_management *im = &sbi->im[type];
398 struct ino_entry *e;
399
400 spin_lock(&im->ino_lock);
401 e = radix_tree_lookup(&im->ino_root, ino);
402 if (e) {
403 list_del(&e->list);
404 radix_tree_delete(&im->ino_root, ino);
405 im->ino_num--;
406 spin_unlock(&im->ino_lock);
407 kmem_cache_free(ino_entry_slab, e);
408 return;
409 }
410 spin_unlock(&im->ino_lock);
411}
412
413void add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
414{
415
416 __add_ino_entry(sbi, ino, type);
417}
418
419void remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
420{
421
422 __remove_ino_entry(sbi, ino, type);
423}
424
425
426bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
427{
428 struct inode_management *im = &sbi->im[mode];
429 struct ino_entry *e;
430
431 spin_lock(&im->ino_lock);
432 e = radix_tree_lookup(&im->ino_root, ino);
433 spin_unlock(&im->ino_lock);
434 return e ? true : false;
435}
436
437void release_ino_entry(struct f2fs_sb_info *sbi)
438{
439 struct ino_entry *e, *tmp;
440 int i;
441
442 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
443 struct inode_management *im = &sbi->im[i];
444
445 spin_lock(&im->ino_lock);
446 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
447 list_del(&e->list);
448 radix_tree_delete(&im->ino_root, e->ino);
449 kmem_cache_free(ino_entry_slab, e);
450 im->ino_num--;
451 }
452 spin_unlock(&im->ino_lock);
453 }
454}
455
456int acquire_orphan_inode(struct f2fs_sb_info *sbi)
457{
458 struct inode_management *im = &sbi->im[ORPHAN_INO];
459 int err = 0;
460
461 spin_lock(&im->ino_lock);
462 if (unlikely(im->ino_num >= sbi->max_orphans))
463 err = -ENOSPC;
464 else
465 im->ino_num++;
466 spin_unlock(&im->ino_lock);
467
468 return err;
469}
470
471void release_orphan_inode(struct f2fs_sb_info *sbi)
472{
473 struct inode_management *im = &sbi->im[ORPHAN_INO];
474
475 spin_lock(&im->ino_lock);
476 f2fs_bug_on(sbi, im->ino_num == 0);
477 im->ino_num--;
478 spin_unlock(&im->ino_lock);
479}
480
481void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
482{
483
484 __add_ino_entry(sbi, ino, ORPHAN_INO);
485}
486
487void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
488{
489
490 __remove_ino_entry(sbi, ino, ORPHAN_INO);
491}
492
493static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
494{
495 struct inode *inode;
496
497 inode = f2fs_iget(sbi->sb, ino);
498 if (IS_ERR(inode)) {
499
500
501
502
503 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
504 return PTR_ERR(inode);
505 }
506
507 clear_nlink(inode);
508
509
510 iput(inode);
511 return 0;
512}
513
514int recover_orphan_inodes(struct f2fs_sb_info *sbi)
515{
516 block_t start_blk, orphan_blocks, i, j;
517 int err;
518
519 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
520 return 0;
521
522 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
523 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
524
525 ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
526
527 for (i = 0; i < orphan_blocks; i++) {
528 struct page *page = get_meta_page(sbi, start_blk + i);
529 struct f2fs_orphan_block *orphan_blk;
530
531 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
532 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
533 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
534 err = recover_orphan_inode(sbi, ino);
535 if (err) {
536 f2fs_put_page(page, 1);
537 return err;
538 }
539 }
540 f2fs_put_page(page, 1);
541 }
542
543 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
544 return 0;
545}
546
547static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
548{
549 struct list_head *head;
550 struct f2fs_orphan_block *orphan_blk = NULL;
551 unsigned int nentries = 0;
552 unsigned short index = 1;
553 unsigned short orphan_blocks;
554 struct page *page = NULL;
555 struct ino_entry *orphan = NULL;
556 struct inode_management *im = &sbi->im[ORPHAN_INO];
557
558 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
559
560
561
562
563
564
565 head = &im->ino_list;
566
567
568 list_for_each_entry(orphan, head, list) {
569 if (!page) {
570 page = grab_meta_page(sbi, start_blk++);
571 orphan_blk =
572 (struct f2fs_orphan_block *)page_address(page);
573 memset(orphan_blk, 0, sizeof(*orphan_blk));
574 }
575
576 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
577
578 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
579
580
581
582
583
584 orphan_blk->blk_addr = cpu_to_le16(index);
585 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
586 orphan_blk->entry_count = cpu_to_le32(nentries);
587 set_page_dirty(page);
588 f2fs_put_page(page, 1);
589 index++;
590 nentries = 0;
591 page = NULL;
592 }
593 }
594
595 if (page) {
596 orphan_blk->blk_addr = cpu_to_le16(index);
597 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
598 orphan_blk->entry_count = cpu_to_le32(nentries);
599 set_page_dirty(page);
600 f2fs_put_page(page, 1);
601 }
602}
603
604static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
605 block_t cp_addr, unsigned long long *version)
606{
607 struct page *cp_page_1, *cp_page_2 = NULL;
608 unsigned long blk_size = sbi->blocksize;
609 struct f2fs_checkpoint *cp_block;
610 unsigned long long cur_version = 0, pre_version = 0;
611 size_t crc_offset;
612 __u32 crc = 0;
613
614
615 cp_page_1 = get_meta_page(sbi, cp_addr);
616
617
618 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
619 crc_offset = le32_to_cpu(cp_block->checksum_offset);
620 if (crc_offset >= blk_size)
621 goto invalid_cp1;
622
623 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
624 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
625 goto invalid_cp1;
626
627 pre_version = cur_cp_version(cp_block);
628
629
630 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
631 cp_page_2 = get_meta_page(sbi, cp_addr);
632
633 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
634 crc_offset = le32_to_cpu(cp_block->checksum_offset);
635 if (crc_offset >= blk_size)
636 goto invalid_cp2;
637
638 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
639 if (!f2fs_crc_valid(crc, cp_block, crc_offset))
640 goto invalid_cp2;
641
642 cur_version = cur_cp_version(cp_block);
643
644 if (cur_version == pre_version) {
645 *version = cur_version;
646 f2fs_put_page(cp_page_2, 1);
647 return cp_page_1;
648 }
649invalid_cp2:
650 f2fs_put_page(cp_page_2, 1);
651invalid_cp1:
652 f2fs_put_page(cp_page_1, 1);
653 return NULL;
654}
655
656int get_valid_checkpoint(struct f2fs_sb_info *sbi)
657{
658 struct f2fs_checkpoint *cp_block;
659 struct f2fs_super_block *fsb = sbi->raw_super;
660 struct page *cp1, *cp2, *cur_page;
661 unsigned long blk_size = sbi->blocksize;
662 unsigned long long cp1_version = 0, cp2_version = 0;
663 unsigned long long cp_start_blk_no;
664 unsigned int cp_blks = 1 + __cp_payload(sbi);
665 block_t cp_blk_no;
666 int i;
667
668 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
669 if (!sbi->ckpt)
670 return -ENOMEM;
671
672
673
674
675 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
676 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
677
678
679 cp_start_blk_no += ((unsigned long long)1) <<
680 le32_to_cpu(fsb->log_blocks_per_seg);
681 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
682
683 if (cp1 && cp2) {
684 if (ver_after(cp2_version, cp1_version))
685 cur_page = cp2;
686 else
687 cur_page = cp1;
688 } else if (cp1) {
689 cur_page = cp1;
690 } else if (cp2) {
691 cur_page = cp2;
692 } else {
693 goto fail_no_cp;
694 }
695
696 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
697 memcpy(sbi->ckpt, cp_block, blk_size);
698
699 if (cp_blks <= 1)
700 goto done;
701
702 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
703 if (cur_page == cp2)
704 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
705
706 for (i = 1; i < cp_blks; i++) {
707 void *sit_bitmap_ptr;
708 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
709
710 cur_page = get_meta_page(sbi, cp_blk_no + i);
711 sit_bitmap_ptr = page_address(cur_page);
712 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
713 f2fs_put_page(cur_page, 1);
714 }
715done:
716 f2fs_put_page(cp1, 1);
717 f2fs_put_page(cp2, 1);
718 return 0;
719
720fail_no_cp:
721 kfree(sbi->ckpt);
722 return -EINVAL;
723}
724
725static void __add_dirty_inode(struct inode *inode, enum inode_type type)
726{
727 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
728 struct f2fs_inode_info *fi = F2FS_I(inode);
729 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
730
731 if (is_inode_flag_set(fi, flag))
732 return;
733
734 set_inode_flag(fi, flag);
735 list_add_tail(&fi->dirty_list, &sbi->inode_list[type]);
736 stat_inc_dirty_inode(sbi, type);
737}
738
739static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
740{
741 struct f2fs_inode_info *fi = F2FS_I(inode);
742 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
743
744 if (get_dirty_pages(inode) ||
745 !is_inode_flag_set(F2FS_I(inode), flag))
746 return;
747
748 list_del_init(&fi->dirty_list);
749 clear_inode_flag(fi, flag);
750 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
751}
752
753void update_dirty_page(struct inode *inode, struct page *page)
754{
755 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
756 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
757
758 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
759 !S_ISLNK(inode->i_mode))
760 return;
761
762 spin_lock(&sbi->inode_lock[type]);
763 __add_dirty_inode(inode, type);
764 inode_inc_dirty_pages(inode);
765 spin_unlock(&sbi->inode_lock[type]);
766
767 SetPagePrivate(page);
768 f2fs_trace_pid(page);
769}
770
771void add_dirty_dir_inode(struct inode *inode)
772{
773 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
774
775 spin_lock(&sbi->inode_lock[DIR_INODE]);
776 __add_dirty_inode(inode, DIR_INODE);
777 spin_unlock(&sbi->inode_lock[DIR_INODE]);
778}
779
780void remove_dirty_inode(struct inode *inode)
781{
782 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
783 struct f2fs_inode_info *fi = F2FS_I(inode);
784 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
785
786 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
787 !S_ISLNK(inode->i_mode))
788 return;
789
790 spin_lock(&sbi->inode_lock[type]);
791 __remove_dirty_inode(inode, type);
792 spin_unlock(&sbi->inode_lock[type]);
793
794
795 if (is_inode_flag_set(fi, FI_DELAY_IPUT)) {
796 clear_inode_flag(fi, FI_DELAY_IPUT);
797 iput(inode);
798 }
799}
800
801int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
802{
803 struct list_head *head;
804 struct inode *inode;
805 struct f2fs_inode_info *fi;
806 bool is_dir = (type == DIR_INODE);
807
808 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
809 get_pages(sbi, is_dir ?
810 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
811retry:
812 if (unlikely(f2fs_cp_error(sbi)))
813 return -EIO;
814
815 spin_lock(&sbi->inode_lock[type]);
816
817 head = &sbi->inode_list[type];
818 if (list_empty(head)) {
819 spin_unlock(&sbi->inode_lock[type]);
820 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
821 get_pages(sbi, is_dir ?
822 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
823 return 0;
824 }
825 fi = list_entry(head->next, struct f2fs_inode_info, dirty_list);
826 inode = igrab(&fi->vfs_inode);
827 spin_unlock(&sbi->inode_lock[type]);
828 if (inode) {
829 filemap_fdatawrite(inode->i_mapping);
830 iput(inode);
831 } else {
832
833
834
835
836 f2fs_submit_merged_bio(sbi, DATA, WRITE);
837 cond_resched();
838 }
839 goto retry;
840}
841
842
843
844
845static int block_operations(struct f2fs_sb_info *sbi)
846{
847 struct writeback_control wbc = {
848 .sync_mode = WB_SYNC_ALL,
849 .nr_to_write = LONG_MAX,
850 .for_reclaim = 0,
851 };
852 struct blk_plug plug;
853 int err = 0;
854
855 blk_start_plug(&plug);
856
857retry_flush_dents:
858 f2fs_lock_all(sbi);
859
860 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
861 f2fs_unlock_all(sbi);
862 err = sync_dirty_inodes(sbi, DIR_INODE);
863 if (err)
864 goto out;
865 goto retry_flush_dents;
866 }
867
868
869
870
871
872retry_flush_nodes:
873 down_write(&sbi->node_write);
874
875 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
876 up_write(&sbi->node_write);
877 err = sync_node_pages(sbi, 0, &wbc);
878 if (err) {
879 f2fs_unlock_all(sbi);
880 goto out;
881 }
882 goto retry_flush_nodes;
883 }
884out:
885 blk_finish_plug(&plug);
886 return err;
887}
888
889static void unblock_operations(struct f2fs_sb_info *sbi)
890{
891 up_write(&sbi->node_write);
892 f2fs_unlock_all(sbi);
893}
894
895static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
896{
897 DEFINE_WAIT(wait);
898
899 for (;;) {
900 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
901
902 if (!get_pages(sbi, F2FS_WRITEBACK))
903 break;
904
905 io_schedule();
906 }
907 finish_wait(&sbi->cp_wait, &wait);
908}
909
910static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
911{
912 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
913 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
914 struct f2fs_nm_info *nm_i = NM_I(sbi);
915 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
916 nid_t last_nid = nm_i->next_scan_nid;
917 block_t start_blk;
918 unsigned int data_sum_blocks, orphan_blocks;
919 __u32 crc32 = 0;
920 int i;
921 int cp_payload_blks = __cp_payload(sbi);
922 block_t discard_blk = NEXT_FREE_BLKADDR(sbi, curseg);
923 bool invalidate = false;
924
925
926
927
928
929 if (discard_next_dnode(sbi, discard_blk))
930 invalidate = true;
931
932
933 while (get_pages(sbi, F2FS_DIRTY_META)) {
934 sync_meta_pages(sbi, META, LONG_MAX);
935 if (unlikely(f2fs_cp_error(sbi)))
936 return -EIO;
937 }
938
939 next_free_nid(sbi, &last_nid);
940
941
942
943
944
945 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
946 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
947 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
948 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
949 ckpt->cur_node_segno[i] =
950 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
951 ckpt->cur_node_blkoff[i] =
952 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
953 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
954 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
955 }
956 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
957 ckpt->cur_data_segno[i] =
958 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
959 ckpt->cur_data_blkoff[i] =
960 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
961 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
962 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
963 }
964
965 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
966 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
967 ckpt->next_free_nid = cpu_to_le32(last_nid);
968
969
970 data_sum_blocks = npages_for_summary_flush(sbi, false);
971 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
972 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
973 else
974 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
975
976 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
977 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
978 orphan_blocks);
979
980 if (__remain_node_summaries(cpc->reason))
981 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
982 cp_payload_blks + data_sum_blocks +
983 orphan_blocks + NR_CURSEG_NODE_TYPE);
984 else
985 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
986 cp_payload_blks + data_sum_blocks +
987 orphan_blocks);
988
989 if (cpc->reason == CP_UMOUNT)
990 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
991 else
992 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
993
994 if (cpc->reason == CP_FASTBOOT)
995 set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
996 else
997 clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
998
999 if (orphan_num)
1000 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1001 else
1002 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1003
1004 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1005 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1006
1007
1008 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1009 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1010
1011 crc32 = f2fs_crc32(ckpt, le32_to_cpu(ckpt->checksum_offset));
1012 *((__le32 *)((unsigned char *)ckpt +
1013 le32_to_cpu(ckpt->checksum_offset)))
1014 = cpu_to_le32(crc32);
1015
1016 start_blk = __start_cp_addr(sbi);
1017
1018
1019 wait_on_all_pages_writeback(sbi);
1020 if (unlikely(f2fs_cp_error(sbi)))
1021 return -EIO;
1022
1023
1024 update_meta_page(sbi, ckpt, start_blk++);
1025
1026 for (i = 1; i < 1 + cp_payload_blks; i++)
1027 update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1028 start_blk++);
1029
1030 if (orphan_num) {
1031 write_orphan_inodes(sbi, start_blk);
1032 start_blk += orphan_blocks;
1033 }
1034
1035 write_data_summaries(sbi, start_blk);
1036 start_blk += data_sum_blocks;
1037 if (__remain_node_summaries(cpc->reason)) {
1038 write_node_summaries(sbi, start_blk);
1039 start_blk += NR_CURSEG_NODE_TYPE;
1040 }
1041
1042
1043 update_meta_page(sbi, ckpt, start_blk);
1044
1045
1046 wait_on_all_pages_writeback(sbi);
1047
1048 if (unlikely(f2fs_cp_error(sbi)))
1049 return -EIO;
1050
1051 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LONG_MAX);
1052 filemap_fdatawait_range(META_MAPPING(sbi), 0, LONG_MAX);
1053
1054
1055 sbi->last_valid_block_count = sbi->total_valid_block_count;
1056 sbi->alloc_valid_block_count = 0;
1057
1058
1059 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
1060
1061
1062 wait_on_all_pages_writeback(sbi);
1063
1064
1065
1066
1067
1068 if (invalidate)
1069 invalidate_mapping_pages(META_MAPPING(sbi), discard_blk,
1070 discard_blk);
1071
1072 release_ino_entry(sbi);
1073
1074 if (unlikely(f2fs_cp_error(sbi)))
1075 return -EIO;
1076
1077 clear_prefree_segments(sbi, cpc);
1078 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1079
1080 return 0;
1081}
1082
1083
1084
1085
1086int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1087{
1088 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1089 unsigned long long ckpt_ver;
1090 int err = 0;
1091
1092 mutex_lock(&sbi->cp_mutex);
1093
1094 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1095 (cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC ||
1096 (cpc->reason == CP_DISCARD && !sbi->discard_blks)))
1097 goto out;
1098 if (unlikely(f2fs_cp_error(sbi))) {
1099 err = -EIO;
1100 goto out;
1101 }
1102 if (f2fs_readonly(sbi->sb)) {
1103 err = -EROFS;
1104 goto out;
1105 }
1106
1107 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1108
1109 err = block_operations(sbi);
1110 if (err)
1111 goto out;
1112
1113 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1114
1115 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1116 f2fs_submit_merged_bio(sbi, NODE, WRITE);
1117 f2fs_submit_merged_bio(sbi, META, WRITE);
1118
1119
1120
1121
1122
1123
1124 ckpt_ver = cur_cp_version(ckpt);
1125 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1126
1127
1128 flush_nat_entries(sbi);
1129 flush_sit_entries(sbi, cpc);
1130
1131
1132 err = do_checkpoint(sbi, cpc);
1133
1134 unblock_operations(sbi);
1135 stat_inc_cp_count(sbi->stat_info);
1136
1137 if (cpc->reason == CP_RECOVERY)
1138 f2fs_msg(sbi->sb, KERN_NOTICE,
1139 "checkpoint: version = %llx", ckpt_ver);
1140
1141
1142 f2fs_update_time(sbi, CP_TIME);
1143 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1144out:
1145 mutex_unlock(&sbi->cp_mutex);
1146 return err;
1147}
1148
1149void init_ino_entry_info(struct f2fs_sb_info *sbi)
1150{
1151 int i;
1152
1153 for (i = 0; i < MAX_INO_ENTRY; i++) {
1154 struct inode_management *im = &sbi->im[i];
1155
1156 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1157 spin_lock_init(&im->ino_lock);
1158 INIT_LIST_HEAD(&im->ino_list);
1159 im->ino_num = 0;
1160 }
1161
1162 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1163 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1164 F2FS_ORPHANS_PER_BLOCK;
1165}
1166
1167int __init create_checkpoint_caches(void)
1168{
1169 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1170 sizeof(struct ino_entry));
1171 if (!ino_entry_slab)
1172 return -ENOMEM;
1173 inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1174 sizeof(struct inode_entry));
1175 if (!inode_entry_slab) {
1176 kmem_cache_destroy(ino_entry_slab);
1177 return -ENOMEM;
1178 }
1179 return 0;
1180}
1181
1182void destroy_checkpoint_caches(void)
1183{
1184 kmem_cache_destroy(ino_entry_slab);
1185 kmem_cache_destroy(inode_entry_slab);
1186}
1187
