1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/checkpoint.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
7 */
8 #include <linux/fs.h>
9 #include <linux/bio.h>
10 #include <linux/mpage.h>
11 #include <linux/writeback.h>
12 #include <linux/blkdev.h>
13 #include <linux/f2fs_fs.h>
14 #include <linux/pagevec.h>
15 #include <linux/swap.h>
16 #include <linux/kthread.h>
17
18 #include "f2fs.h"
19 #include "node.h"
20 #include "segment.h"
21 #include "iostat.h"
22 #include <trace/events/f2fs.h>
23
24 #define DEFAULT_CHECKPOINT_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3))
25
26 static struct kmem_cache *ino_entry_slab;
27 struct kmem_cache *f2fs_inode_entry_slab;
28
29 void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io,
30 unsigned char reason)
31 {
32 f2fs_build_fault_attr(sbi, 0, 0);
33 if (!end_io)
34 f2fs_flush_merged_writes(sbi);
35 f2fs_handle_critical_error(sbi, reason, end_io);
36 }
37
38 /*
39 * We guarantee no failure on the returned page.
40 */
41 struct page *f2fs_grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
42 {
43 struct address_space *mapping = META_MAPPING(sbi);
44 struct page *page;
45 repeat:
46 page = f2fs_grab_cache_page(mapping, index, false);
47 if (!page) {
48 cond_resched();
49 goto repeat;
50 }
51 f2fs_wait_on_page_writeback(page, META, true, true);
52 if (!PageUptodate(page))
53 SetPageUptodate(page);
54 return page;
55 }
56
57 static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
58 bool is_meta)
59 {
60 struct address_space *mapping = META_MAPPING(sbi);
61 struct page *page;
62 struct f2fs_io_info fio = {
63 .sbi = sbi,
64 .type = META,
65 .op = REQ_OP_READ,
66 .op_flags = REQ_META | REQ_PRIO,
67 .old_blkaddr = index,
68 .new_blkaddr = index,
69 .encrypted_page = NULL,
70 .is_por = !is_meta ? 1 : 0,
71 };
72 int err;
73
74 if (unlikely(!is_meta))
75 fio.op_flags &= ~REQ_META;
76 repeat:
77 page = f2fs_grab_cache_page(mapping, index, false);
78 if (!page) {
79 cond_resched();
80 goto repeat;
81 }
82 if (PageUptodate(page))
83 goto out;
84
85 fio.page = page;
86
87 err = f2fs_submit_page_bio(&fio);
88 if (err) {
89 f2fs_put_page(page, 1);
90 return ERR_PTR(err);
91 }
92
93 f2fs_update_iostat(sbi, NULL, FS_META_READ_IO, F2FS_BLKSIZE);
94
95 lock_page(page);
96 if (unlikely(page->mapping != mapping)) {
97 f2fs_put_page(page, 1);
98 goto repeat;
99 }
100
101 if (unlikely(!PageUptodate(page))) {
102 f2fs_handle_page_eio(sbi, page->index, META);
103 f2fs_put_page(page, 1);
104 return ERR_PTR(-EIO);
105 }
106 out:
107 return page;
108 }
109
110 struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
111 {
112 return __get_meta_page(sbi, index, true);
113 }
114
115 struct page *f2fs_get_meta_page_retry(struct f2fs_sb_info *sbi, pgoff_t index)
116 {
117 struct page *page;
118 int count = 0;
119
120 retry:
121 page = __get_meta_page(sbi, index, true);
122 if (IS_ERR(page)) {
123 if (PTR_ERR(page) == -EIO &&
124 ++count <= DEFAULT_RETRY_IO_COUNT)
125 goto retry;
126 f2fs_stop_checkpoint(sbi, false, STOP_CP_REASON_META_PAGE);
127 }
128 return page;
129 }
130
131 /* for POR only */
132 struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
133 {
134 return __get_meta_page(sbi, index, false);
135 }
136
137 static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
138 int type)
139 {
140 struct seg_entry *se;
141 unsigned int segno, offset;
142 bool exist;
143
144 if (type == DATA_GENERIC)
145 return true;
146
147 segno = GET_SEGNO(sbi, blkaddr);
148 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
149 se = get_seg_entry(sbi, segno);
150
151 exist = f2fs_test_bit(offset, se->cur_valid_map);
152
153 /* skip data, if we already have an error in checkpoint. */
154 if (unlikely(f2fs_cp_error(sbi)))
155 return exist;
156
157 if ((exist && type == DATA_GENERIC_ENHANCE_UPDATE) ||
158 (!exist && type == DATA_GENERIC_ENHANCE))
159 goto out_err;
160 if (!exist && type != DATA_GENERIC_ENHANCE_UPDATE)
161 goto out_handle;
162 return exist;
163
164 out_err:
165 f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
166 blkaddr, exist);
167 set_sbi_flag(sbi, SBI_NEED_FSCK);
168 dump_stack();
169 out_handle:
170 f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
171 return exist;
172 }
173
174 static bool __f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
175 block_t blkaddr, int type)
176 {
177 switch (type) {
178 case META_NAT:
179 break;
180 case META_SIT:
181 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
182 goto check_only;
183 break;
184 case META_SSA:
185 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
186 blkaddr < SM_I(sbi)->ssa_blkaddr))
187 goto check_only;
188 break;
189 case META_CP:
190 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
191 blkaddr < __start_cp_addr(sbi)))
192 goto check_only;
193 break;
194 case META_POR:
195 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
196 blkaddr < MAIN_BLKADDR(sbi)))
197 goto check_only;
198 break;
199 case DATA_GENERIC:
200 case DATA_GENERIC_ENHANCE:
201 case DATA_GENERIC_ENHANCE_READ:
202 case DATA_GENERIC_ENHANCE_UPDATE:
203 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
204 blkaddr < MAIN_BLKADDR(sbi))) {
205
206 /* Skip to emit an error message. */
207 if (unlikely(f2fs_cp_error(sbi)))
208 return false;
209
210 f2fs_warn(sbi, "access invalid blkaddr:%u",
211 blkaddr);
212 set_sbi_flag(sbi, SBI_NEED_FSCK);
213 dump_stack();
214 goto err;
215 } else {
216 return __is_bitmap_valid(sbi, blkaddr, type);
217 }
218 break;
219 case META_GENERIC:
220 if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
221 blkaddr >= MAIN_BLKADDR(sbi)))
222 goto err;
223 break;
224 default:
225 BUG();
226 }
227
228 return true;
229 err:
230 f2fs_handle_error(sbi, ERROR_INVALID_BLKADDR);
231 check_only:
232 return false;
233 }
234
235 bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
236 block_t blkaddr, int type)
237 {
238 if (time_to_inject(sbi, FAULT_BLKADDR_VALIDITY))
239 return false;
240 return __f2fs_is_valid_blkaddr(sbi, blkaddr, type);
241 }
242
243 bool f2fs_is_valid_blkaddr_raw(struct f2fs_sb_info *sbi,
244 block_t blkaddr, int type)
245 {
246 return __f2fs_is_valid_blkaddr(sbi, blkaddr, type);
247 }
248
249 /*
250 * Readahead CP/NAT/SIT/SSA/POR pages
251 */
252 int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
253 int type, bool sync)
254 {
255 struct page *page;
256 block_t blkno = start;
257 struct f2fs_io_info fio = {
258 .sbi = sbi,
259 .type = META,
260 .op = REQ_OP_READ,
261 .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
262 .encrypted_page = NULL,
263 .in_list = 0,
264 .is_por = (type == META_POR) ? 1 : 0,
265 };
266 struct blk_plug plug;
267 int err;
268
269 if (unlikely(type == META_POR))
270 fio.op_flags &= ~REQ_META;
271
272 blk_start_plug(&plug);
273 for (; nrpages-- > 0; blkno++) {
274
275 if (!f2fs_is_valid_blkaddr(sbi, blkno, type))
276 goto out;
277
278 switch (type) {
279 case META_NAT:
280 if (unlikely(blkno >=
281 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
282 blkno = 0;
283 /* get nat block addr */
284 fio.new_blkaddr = current_nat_addr(sbi,
285 blkno * NAT_ENTRY_PER_BLOCK);
286 break;
287 case META_SIT:
288 if (unlikely(blkno >= TOTAL_SEGS(sbi)))
289 goto out;
290 /* get sit block addr */
291 fio.new_blkaddr = current_sit_addr(sbi,
292 blkno * SIT_ENTRY_PER_BLOCK);
293 break;
294 case META_SSA:
295 case META_CP:
296 case META_POR:
297 fio.new_blkaddr = blkno;
298 break;
299 default:
300 BUG();
301 }
302
303 page = f2fs_grab_cache_page(META_MAPPING(sbi),
304 fio.new_blkaddr, false);
305 if (!page)
306 continue;
307 if (PageUptodate(page)) {
308 f2fs_put_page(page, 1);
309 continue;
310 }
311
312 fio.page = page;
313 err = f2fs_submit_page_bio(&fio);
314 f2fs_put_page(page, err ? 1 : 0);
315
316 if (!err)
317 f2fs_update_iostat(sbi, NULL, FS_META_READ_IO,
318 F2FS_BLKSIZE);
319 }
320 out:
321 blk_finish_plug(&plug);
322 return blkno - start;
323 }
324
325 void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index,
326 unsigned int ra_blocks)
327 {
328 struct page *page;
329 bool readahead = false;
330
331 if (ra_blocks == RECOVERY_MIN_RA_BLOCKS)
332 return;
333
334 page = find_get_page(META_MAPPING(sbi), index);
335 if (!page || !PageUptodate(page))
336 readahead = true;
337 f2fs_put_page(page, 0);
338
339 if (readahead)
340 f2fs_ra_meta_pages(sbi, index, ra_blocks, META_POR, true);
341 }
342
343 static int __f2fs_write_meta_page(struct page *page,
344 struct writeback_control *wbc,
345 enum iostat_type io_type)
346 {
347 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
348
349 trace_f2fs_writepage(page_folio(page), META);
350
351 if (unlikely(f2fs_cp_error(sbi))) {
352 if (is_sbi_flag_set(sbi, SBI_IS_CLOSE)) {
353 ClearPageUptodate(page);
354 dec_page_count(sbi, F2FS_DIRTY_META);
355 unlock_page(page);
356 return 0;
357 }
358 goto redirty_out;
359 }
360 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
361 goto redirty_out;
362 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
363 goto redirty_out;
364
365 f2fs_do_write_meta_page(sbi, page, io_type);
366 dec_page_count(sbi, F2FS_DIRTY_META);
367
368 if (wbc->for_reclaim)
369 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, META);
370
371 unlock_page(page);
372
373 if (unlikely(f2fs_cp_error(sbi)))
374 f2fs_submit_merged_write(sbi, META);
375
376 return 0;
377
378 redirty_out:
379 redirty_page_for_writepage(wbc, page);
380 return AOP_WRITEPAGE_ACTIVATE;
381 }
382
383 static int f2fs_write_meta_page(struct page *page,
384 struct writeback_control *wbc)
385 {
386 return __f2fs_write_meta_page(page, wbc, FS_META_IO);
387 }
388
389 static int f2fs_write_meta_pages(struct address_space *mapping,
390 struct writeback_control *wbc)
391 {
392 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
393 long diff, written;
394
395 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
396 goto skip_write;
397
398 /* collect a number of dirty meta pages and write together */
399 if (wbc->sync_mode != WB_SYNC_ALL &&
400 get_pages(sbi, F2FS_DIRTY_META) <
401 nr_pages_to_skip(sbi, META))
402 goto skip_write;
403
404 /* if locked failed, cp will flush dirty pages instead */
405 if (!f2fs_down_write_trylock(&sbi->cp_global_sem))
406 goto skip_write;
407
408 trace_f2fs_writepages(mapping->host, wbc, META);
409 diff = nr_pages_to_write(sbi, META, wbc);
410 written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO);
411 f2fs_up_write(&sbi->cp_global_sem);
412 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
413 return 0;
414
415 skip_write:
416 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
417 trace_f2fs_writepages(mapping->host, wbc, META);
418 return 0;
419 }
420
421 long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
422 long nr_to_write, enum iostat_type io_type)
423 {
424 struct address_space *mapping = META_MAPPING(sbi);
425 pgoff_t index = 0, prev = ULONG_MAX;
426 struct folio_batch fbatch;
427 long nwritten = 0;
428 int nr_folios;
429 struct writeback_control wbc = {
430 .for_reclaim = 0,
431 };
432 struct blk_plug plug;
433
434 folio_batch_init(&fbatch);
435
436 blk_start_plug(&plug);
437
438 while ((nr_folios = filemap_get_folios_tag(mapping, &index,
439 (pgoff_t)-1,
440 PAGECACHE_TAG_DIRTY, &fbatch))) {
441 int i;
442
443 for (i = 0; i < nr_folios; i++) {
444 struct folio *folio = fbatch.folios[i];
445
446 if (nr_to_write != LONG_MAX && i != 0 &&
447 folio->index != prev +
448 folio_nr_pages(fbatch.folios[i-1])) {
449 folio_batch_release(&fbatch);
450 goto stop;
451 }
452
453 folio_lock(folio);
454
455 if (unlikely(folio->mapping != mapping)) {
456 continue_unlock:
457 folio_unlock(folio);
458 continue;
459 }
460 if (!folio_test_dirty(folio)) {
461 /* someone wrote it for us */
462 goto continue_unlock;
463 }
464
465 f2fs_wait_on_page_writeback(&folio->page, META,
466 true, true);
467
468 if (!folio_clear_dirty_for_io(folio))
469 goto continue_unlock;
470
471 if (__f2fs_write_meta_page(&folio->page, &wbc,
472 io_type)) {
473 folio_unlock(folio);
474 break;
475 }
476 nwritten += folio_nr_pages(folio);
477 prev = folio->index;
478 if (unlikely(nwritten >= nr_to_write))
479 break;
480 }
481 folio_batch_release(&fbatch);
482 cond_resched();
483 }
484 stop:
485 if (nwritten)
486 f2fs_submit_merged_write(sbi, type);
487
488 blk_finish_plug(&plug);
489
490 return nwritten;
491 }
492
493 static bool f2fs_dirty_meta_folio(struct address_space *mapping,
494 struct folio *folio)
495 {
496 trace_f2fs_set_page_dirty(folio, META);
497
498 if (!folio_test_uptodate(folio))
499 folio_mark_uptodate(folio);
500 if (filemap_dirty_folio(mapping, folio)) {
501 inc_page_count(F2FS_M_SB(mapping), F2FS_DIRTY_META);
502 set_page_private_reference(&folio->page);
503 return true;
504 }
505 return false;
506 }
507
508 const struct address_space_operations f2fs_meta_aops = {
509 .writepage = f2fs_write_meta_page,
510 .writepages = f2fs_write_meta_pages,
511 .dirty_folio = f2fs_dirty_meta_folio,
512 .invalidate_folio = f2fs_invalidate_folio,
513 .release_folio = f2fs_release_folio,
514 .migrate_folio = filemap_migrate_folio,
515 };
516
517 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
518 unsigned int devidx, int type)
519 {
520 struct inode_management *im = &sbi->im[type];
521 struct ino_entry *e = NULL, *new = NULL;
522
523 if (type == FLUSH_INO) {
524 rcu_read_lock();
525 e = radix_tree_lookup(&im->ino_root, ino);
526 rcu_read_unlock();
527 }
528
529 retry:
530 if (!e)
531 new = f2fs_kmem_cache_alloc(ino_entry_slab,
532 GFP_NOFS, true, NULL);
533
534 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
535
536 spin_lock(&im->ino_lock);
537 e = radix_tree_lookup(&im->ino_root, ino);
538 if (!e) {
539 if (!new) {
540 spin_unlock(&im->ino_lock);
541 radix_tree_preload_end();
542 goto retry;
543 }
544 e = new;
545 if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
546 f2fs_bug_on(sbi, 1);
547
548 memset(e, 0, sizeof(struct ino_entry));
549 e->ino = ino;
550
551 list_add_tail(&e->list, &im->ino_list);
552 if (type != ORPHAN_INO)
553 im->ino_num++;
554 }
555
556 if (type == FLUSH_INO)
557 f2fs_set_bit(devidx, (char *)&e->dirty_device);
558
559 spin_unlock(&im->ino_lock);
560 radix_tree_preload_end();
561
562 if (new && e != new)
563 kmem_cache_free(ino_entry_slab, new);
564 }
565
566 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
567 {
568 struct inode_management *im = &sbi->im[type];
569 struct ino_entry *e;
570
571 spin_lock(&im->ino_lock);
572 e = radix_tree_lookup(&im->ino_root, ino);
573 if (e) {
574 list_del(&e->list);
575 radix_tree_delete(&im->ino_root, ino);
576 im->ino_num--;
577 spin_unlock(&im->ino_lock);
578 kmem_cache_free(ino_entry_slab, e);
579 return;
580 }
581 spin_unlock(&im->ino_lock);
582 }
583
584 void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
585 {
586 /* add new dirty ino entry into list */
587 __add_ino_entry(sbi, ino, 0, type);
588 }
589
590 void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
591 {
592 /* remove dirty ino entry from list */
593 __remove_ino_entry(sbi, ino, type);
594 }
595
596 /* mode should be APPEND_INO, UPDATE_INO or TRANS_DIR_INO */
597 bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
598 {
599 struct inode_management *im = &sbi->im[mode];
600 struct ino_entry *e;
601
602 spin_lock(&im->ino_lock);
603 e = radix_tree_lookup(&im->ino_root, ino);
604 spin_unlock(&im->ino_lock);
605 return e ? true : false;
606 }
607
608 void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all)
609 {
610 struct ino_entry *e, *tmp;
611 int i;
612
613 for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; i++) {
614 struct inode_management *im = &sbi->im[i];
615
616 spin_lock(&im->ino_lock);
617 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
618 list_del(&e->list);
619 radix_tree_delete(&im->ino_root, e->ino);
620 kmem_cache_free(ino_entry_slab, e);
621 im->ino_num--;
622 }
623 spin_unlock(&im->ino_lock);
624 }
625 }
626
627 void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
628 unsigned int devidx, int type)
629 {
630 __add_ino_entry(sbi, ino, devidx, type);
631 }
632
633 bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
634 unsigned int devidx, int type)
635 {
636 struct inode_management *im = &sbi->im[type];
637 struct ino_entry *e;
638 bool is_dirty = false;
639
640 spin_lock(&im->ino_lock);
641 e = radix_tree_lookup(&im->ino_root, ino);
642 if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device))
643 is_dirty = true;
644 spin_unlock(&im->ino_lock);
645 return is_dirty;
646 }
647
648 int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi)
649 {
650 struct inode_management *im = &sbi->im[ORPHAN_INO];
651 int err = 0;
652
653 spin_lock(&im->ino_lock);
654
655 if (time_to_inject(sbi, FAULT_ORPHAN)) {
656 spin_unlock(&im->ino_lock);
657 return -ENOSPC;
658 }
659
660 if (unlikely(im->ino_num >= sbi->max_orphans))
661 err = -ENOSPC;
662 else
663 im->ino_num++;
664 spin_unlock(&im->ino_lock);
665
666 return err;
667 }
668
669 void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi)
670 {
671 struct inode_management *im = &sbi->im[ORPHAN_INO];
672
673 spin_lock(&im->ino_lock);
674 f2fs_bug_on(sbi, im->ino_num == 0);
675 im->ino_num--;
676 spin_unlock(&im->ino_lock);
677 }
678
679 void f2fs_add_orphan_inode(struct inode *inode)
680 {
681 /* add new orphan ino entry into list */
682 __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO);
683 f2fs_update_inode_page(inode);
684 }
685
686 void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
687 {
688 /* remove orphan entry from orphan list */
689 __remove_ino_entry(sbi, ino, ORPHAN_INO);
690 }
691
692 static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
693 {
694 struct inode *inode;
695 struct node_info ni;
696 int err;
697
698 inode = f2fs_iget_retry(sbi->sb, ino);
699 if (IS_ERR(inode)) {
700 /*
701 * there should be a bug that we can't find the entry
702 * to orphan inode.
703 */
704 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
705 return PTR_ERR(inode);
706 }
707
708 err = f2fs_dquot_initialize(inode);
709 if (err) {
710 iput(inode);
711 goto err_out;
712 }
713
714 clear_nlink(inode);
715
716 /* truncate all the data during iput */
717 iput(inode);
718
719 err = f2fs_get_node_info(sbi, ino, &ni, false);
720 if (err)
721 goto err_out;
722
723 /* ENOMEM was fully retried in f2fs_evict_inode. */
724 if (ni.blk_addr != NULL_ADDR) {
725 err = -EIO;
726 goto err_out;
727 }
728 return 0;
729
730 err_out:
731 set_sbi_flag(sbi, SBI_NEED_FSCK);
732 f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
733 __func__, ino);
734 return err;
735 }
736
737 int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
738 {
739 block_t start_blk, orphan_blocks, i, j;
740 int err = 0;
741
742 if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
743 return 0;
744
745 if (f2fs_hw_is_readonly(sbi)) {
746 f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
747 return 0;
748 }
749
750 if (is_sbi_flag_set(sbi, SBI_IS_WRITABLE))
751 f2fs_info(sbi, "orphan cleanup on readonly fs");
752
753 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
754 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
755
756 f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
757
758 for (i = 0; i < orphan_blocks; i++) {
759 struct page *page;
760 struct f2fs_orphan_block *orphan_blk;
761
762 page = f2fs_get_meta_page(sbi, start_blk + i);
763 if (IS_ERR(page)) {
764 err = PTR_ERR(page);
765 goto out;
766 }
767
768 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
769 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
770 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
771
772 err = recover_orphan_inode(sbi, ino);
773 if (err) {
774 f2fs_put_page(page, 1);
775 goto out;
776 }
777 }
778 f2fs_put_page(page, 1);
779 }
780 /* clear Orphan Flag */
781 clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
782 out:
783 set_sbi_flag(sbi, SBI_IS_RECOVERED);
784
785 return err;
786 }
787
788 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
789 {
790 struct list_head *head;
791 struct f2fs_orphan_block *orphan_blk = NULL;
792 unsigned int nentries = 0;
793 unsigned short index = 1;
794 unsigned short orphan_blocks;
795 struct page *page = NULL;
796 struct ino_entry *orphan = NULL;
797 struct inode_management *im = &sbi->im[ORPHAN_INO];
798
799 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
800
801 /*
802 * we don't need to do spin_lock(&im->ino_lock) here, since all the
803 * orphan inode operations are covered under f2fs_lock_op().
804 * And, spin_lock should be avoided due to page operations below.
805 */
806 head = &im->ino_list;
807
808 /* loop for each orphan inode entry and write them in journal block */
809 list_for_each_entry(orphan, head, list) {
810 if (!page) {
811 page = f2fs_grab_meta_page(sbi, start_blk++);
812 orphan_blk =
813 (struct f2fs_orphan_block *)page_address(page);
814 memset(orphan_blk, 0, sizeof(*orphan_blk));
815 }
816
817 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
818
819 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
820 /*
821 * an orphan block is full of 1020 entries,
822 * then we need to flush current orphan blocks
823 * and bring another one in memory
824 */
825 orphan_blk->blk_addr = cpu_to_le16(index);
826 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
827 orphan_blk->entry_count = cpu_to_le32(nentries);
828 set_page_dirty(page);
829 f2fs_put_page(page, 1);
830 index++;
831 nentries = 0;
832 page = NULL;
833 }
834 }
835
836 if (page) {
837 orphan_blk->blk_addr = cpu_to_le16(index);
838 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
839 orphan_blk->entry_count = cpu_to_le32(nentries);
840 set_page_dirty(page);
841 f2fs_put_page(page, 1);
842 }
843 }
844
845 static __u32 f2fs_checkpoint_chksum(struct f2fs_sb_info *sbi,
846 struct f2fs_checkpoint *ckpt)
847 {
848 unsigned int chksum_ofs = le32_to_cpu(ckpt->checksum_offset);
849 __u32 chksum;
850
851 chksum = f2fs_crc32(sbi, ckpt, chksum_ofs);
852 if (chksum_ofs < CP_CHKSUM_OFFSET) {
853 chksum_ofs += sizeof(chksum);
854 chksum = f2fs_chksum(sbi, chksum, (__u8 *)ckpt + chksum_ofs,
855 F2FS_BLKSIZE - chksum_ofs);
856 }
857 return chksum;
858 }
859
860 static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
861 struct f2fs_checkpoint **cp_block, struct page **cp_page,
862 unsigned long long *version)
863 {
864 size_t crc_offset = 0;
865 __u32 crc;
866
867 *cp_page = f2fs_get_meta_page(sbi, cp_addr);
868 if (IS_ERR(*cp_page))
869 return PTR_ERR(*cp_page);
870
871 *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
872
873 crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
874 if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
875 crc_offset > CP_CHKSUM_OFFSET) {
876 f2fs_put_page(*cp_page, 1);
877 f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
878 return -EINVAL;
879 }
880
881 crc = f2fs_checkpoint_chksum(sbi, *cp_block);
882 if (crc != cur_cp_crc(*cp_block)) {
883 f2fs_put_page(*cp_page, 1);
884 f2fs_warn(sbi, "invalid crc value");
885 return -EINVAL;
886 }
887
888 *version = cur_cp_version(*cp_block);
889 return 0;
890 }
891
892 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
893 block_t cp_addr, unsigned long long *version)
894 {
895 struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
896 struct f2fs_checkpoint *cp_block = NULL;
897 unsigned long long cur_version = 0, pre_version = 0;
898 unsigned int cp_blocks;
899 int err;
900
901 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
902 &cp_page_1, version);
903 if (err)
904 return NULL;
905
906 cp_blocks = le32_to_cpu(cp_block->cp_pack_total_block_count);
907
908 if (cp_blocks > BLKS_PER_SEG(sbi) || cp_blocks <= F2FS_CP_PACKS) {
909 f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
910 le32_to_cpu(cp_block->cp_pack_total_block_count));
911 goto invalid_cp;
912 }
913 pre_version = *version;
914
915 cp_addr += cp_blocks - 1;
916 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
917 &cp_page_2, version);
918 if (err)
919 goto invalid_cp;
920 cur_version = *version;
921
922 if (cur_version == pre_version) {
923 *version = cur_version;
924 f2fs_put_page(cp_page_2, 1);
925 return cp_page_1;
926 }
927 f2fs_put_page(cp_page_2, 1);
928 invalid_cp:
929 f2fs_put_page(cp_page_1, 1);
930 return NULL;
931 }
932
933 int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
934 {
935 struct f2fs_checkpoint *cp_block;
936 struct f2fs_super_block *fsb = sbi->raw_super;
937 struct page *cp1, *cp2, *cur_page;
938 unsigned long blk_size = sbi->blocksize;
939 unsigned long long cp1_version = 0, cp2_version = 0;
940 unsigned long long cp_start_blk_no;
941 unsigned int cp_blks = 1 + __cp_payload(sbi);
942 block_t cp_blk_no;
943 int i;
944 int err;
945
946 sbi->ckpt = f2fs_kvzalloc(sbi, array_size(blk_size, cp_blks),
947 GFP_KERNEL);
948 if (!sbi->ckpt)
949 return -ENOMEM;
950 /*
951 * Finding out valid cp block involves read both
952 * sets( cp pack 1 and cp pack 2)
953 */
954 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
955 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
956
957 /* The second checkpoint pack should start at the next segment */
958 cp_start_blk_no += ((unsigned long long)1) <<
959 le32_to_cpu(fsb->log_blocks_per_seg);
960 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
961
962 if (cp1 && cp2) {
963 if (ver_after(cp2_version, cp1_version))
964 cur_page = cp2;
965 else
966 cur_page = cp1;
967 } else if (cp1) {
968 cur_page = cp1;
969 } else if (cp2) {
970 cur_page = cp2;
971 } else {
972 err = -EFSCORRUPTED;
973 goto fail_no_cp;
974 }
975
976 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
977 memcpy(sbi->ckpt, cp_block, blk_size);
978
979 if (cur_page == cp1)
980 sbi->cur_cp_pack = 1;
981 else
982 sbi->cur_cp_pack = 2;
983
984 /* Sanity checking of checkpoint */
985 if (f2fs_sanity_check_ckpt(sbi)) {
986 err = -EFSCORRUPTED;
987 goto free_fail_no_cp;
988 }
989
990 if (cp_blks <= 1)
991 goto done;
992
993 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
994 if (cur_page == cp2)
995 cp_blk_no += BIT(le32_to_cpu(fsb->log_blocks_per_seg));
996
997 for (i = 1; i < cp_blks; i++) {
998 void *sit_bitmap_ptr;
999 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
1000
1001 cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
1002 if (IS_ERR(cur_page)) {
1003 err = PTR_ERR(cur_page);
1004 goto free_fail_no_cp;
1005 }
1006 sit_bitmap_ptr = page_address(cur_page);
1007 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
1008 f2fs_put_page(cur_page, 1);
1009 }
1010 done:
1011 f2fs_put_page(cp1, 1);
1012 f2fs_put_page(cp2, 1);
1013 return 0;
1014
1015 free_fail_no_cp:
1016 f2fs_put_page(cp1, 1);
1017 f2fs_put_page(cp2, 1);
1018 fail_no_cp:
1019 kvfree(sbi->ckpt);
1020 return err;
1021 }
1022
1023 static void __add_dirty_inode(struct inode *inode, enum inode_type type)
1024 {
1025 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1026 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
1027
1028 if (is_inode_flag_set(inode, flag))
1029 return;
1030
1031 set_inode_flag(inode, flag);
1032 list_add_tail(&F2FS_I(inode)->dirty_list, &sbi->inode_list[type]);
1033 stat_inc_dirty_inode(sbi, type);
1034 }
1035
1036 static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
1037 {
1038 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
1039
1040 if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
1041 return;
1042
1043 list_del_init(&F2FS_I(inode)->dirty_list);
1044 clear_inode_flag(inode, flag);
1045 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
1046 }
1047
1048 void f2fs_update_dirty_folio(struct inode *inode, struct folio *folio)
1049 {
1050 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1051 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1052
1053 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1054 !S_ISLNK(inode->i_mode))
1055 return;
1056
1057 spin_lock(&sbi->inode_lock[type]);
1058 if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
1059 __add_dirty_inode(inode, type);
1060 inode_inc_dirty_pages(inode);
1061 spin_unlock(&sbi->inode_lock[type]);
1062
1063 set_page_private_reference(&folio->page);
1064 }
1065
1066 void f2fs_remove_dirty_inode(struct inode *inode)
1067 {
1068 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1069 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1070
1071 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1072 !S_ISLNK(inode->i_mode))
1073 return;
1074
1075 if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
1076 return;
1077
1078 spin_lock(&sbi->inode_lock[type]);
1079 __remove_dirty_inode(inode, type);
1080 spin_unlock(&sbi->inode_lock[type]);
1081 }
1082
1083 int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type,
1084 bool from_cp)
1085 {
1086 struct list_head *head;
1087 struct inode *inode;
1088 struct f2fs_inode_info *fi;
1089 bool is_dir = (type == DIR_INODE);
1090 unsigned long ino = 0;
1091
1092 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
1093 get_pages(sbi, is_dir ?
1094 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1095 retry:
1096 if (unlikely(f2fs_cp_error(sbi))) {
1097 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
1098 get_pages(sbi, is_dir ?
1099 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1100 return -EIO;
1101 }
1102
1103 spin_lock(&sbi->inode_lock[type]);
1104
1105 head = &sbi->inode_list[type];
1106 if (list_empty(head)) {
1107 spin_unlock(&sbi->inode_lock[type]);
1108 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
1109 get_pages(sbi, is_dir ?
1110 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1111 return 0;
1112 }
1113 fi = list_first_entry(head, struct f2fs_inode_info, dirty_list);
1114 inode = igrab(&fi->vfs_inode);
1115 spin_unlock(&sbi->inode_lock[type]);
1116 if (inode) {
1117 unsigned long cur_ino = inode->i_ino;
1118
1119 if (from_cp)
1120 F2FS_I(inode)->cp_task = current;
1121 F2FS_I(inode)->wb_task = current;
1122
1123 filemap_fdatawrite(inode->i_mapping);
1124
1125 F2FS_I(inode)->wb_task = NULL;
1126 if (from_cp)
1127 F2FS_I(inode)->cp_task = NULL;
1128
1129 iput(inode);
1130 /* We need to give cpu to another writers. */
1131 if (ino == cur_ino)
1132 cond_resched();
1133 else
1134 ino = cur_ino;
1135 } else {
1136 /*
1137 * We should submit bio, since it exists several
1138 * writebacking dentry pages in the freeing inode.
1139 */
1140 f2fs_submit_merged_write(sbi, DATA);
1141 cond_resched();
1142 }
1143 goto retry;
1144 }
1145
1146 static int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
1147 {
1148 struct list_head *head = &sbi->inode_list[DIRTY_META];
1149 struct inode *inode;
1150 struct f2fs_inode_info *fi;
1151 s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
1152
1153 while (total--) {
1154 if (unlikely(f2fs_cp_error(sbi)))
1155 return -EIO;
1156
1157 spin_lock(&sbi->inode_lock[DIRTY_META]);
1158 if (list_empty(head)) {
1159 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1160 return 0;
1161 }
1162 fi = list_first_entry(head, struct f2fs_inode_info,
1163 gdirty_list);
1164 inode = igrab(&fi->vfs_inode);
1165 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1166 if (inode) {
1167 sync_inode_metadata(inode, 0);
1168
1169 /* it's on eviction */
1170 if (is_inode_flag_set(inode, FI_DIRTY_INODE))
1171 f2fs_update_inode_page(inode);
1172 iput(inode);
1173 }
1174 }
1175 return 0;
1176 }
1177
1178 static void __prepare_cp_block(struct f2fs_sb_info *sbi)
1179 {
1180 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1181 struct f2fs_nm_info *nm_i = NM_I(sbi);
1182 nid_t last_nid = nm_i->next_scan_nid;
1183
1184 next_free_nid(sbi, &last_nid);
1185 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
1186 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
1187 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
1188 ckpt->next_free_nid = cpu_to_le32(last_nid);
1189
1190 /* update user_block_counts */
1191 sbi->last_valid_block_count = sbi->total_valid_block_count;
1192 percpu_counter_set(&sbi->alloc_valid_block_count, 0);
1193 percpu_counter_set(&sbi->rf_node_block_count, 0);
1194 }
1195
1196 static bool __need_flush_quota(struct f2fs_sb_info *sbi)
1197 {
1198 bool ret = false;
1199
1200 if (!is_journalled_quota(sbi))
1201 return false;
1202
1203 if (!f2fs_down_write_trylock(&sbi->quota_sem))
1204 return true;
1205 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
1206 ret = false;
1207 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
1208 ret = false;
1209 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
1210 clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1211 ret = true;
1212 } else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
1213 ret = true;
1214 }
1215 f2fs_up_write(&sbi->quota_sem);
1216 return ret;
1217 }
1218
1219 /*
1220 * Freeze all the FS-operations for checkpoint.
1221 */
1222 static int block_operations(struct f2fs_sb_info *sbi)
1223 {
1224 struct writeback_control wbc = {
1225 .sync_mode = WB_SYNC_ALL,
1226 .nr_to_write = LONG_MAX,
1227 .for_reclaim = 0,
1228 };
1229 int err = 0, cnt = 0;
1230
1231 /*
1232 * Let's flush inline_data in dirty node pages.
1233 */
1234 f2fs_flush_inline_data(sbi);
1235
1236 retry_flush_quotas:
1237 f2fs_lock_all(sbi);
1238 if (__need_flush_quota(sbi)) {
1239 int locked;
1240
1241 if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
1242 set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1243 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1244 goto retry_flush_dents;
1245 }
1246 f2fs_unlock_all(sbi);
1247
1248 /* only failed during mount/umount/freeze/quotactl */
1249 locked = down_read_trylock(&sbi->sb->s_umount);
1250 f2fs_quota_sync(sbi->sb, -1);
1251 if (locked)
1252 up_read(&sbi->sb->s_umount);
1253 cond_resched();
1254 goto retry_flush_quotas;
1255 }
1256
1257 retry_flush_dents:
1258 /* write all the dirty dentry pages */
1259 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
1260 f2fs_unlock_all(sbi);
1261 err = f2fs_sync_dirty_inodes(sbi, DIR_INODE, true);
1262 if (err)
1263 return err;
1264 cond_resched();
1265 goto retry_flush_quotas;
1266 }
1267
1268 /*
1269 * POR: we should ensure that there are no dirty node pages
1270 * until finishing nat/sit flush. inode->i_blocks can be updated.
1271 */
1272 f2fs_down_write(&sbi->node_change);
1273
1274 if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
1275 f2fs_up_write(&sbi->node_change);
1276 f2fs_unlock_all(sbi);
1277 err = f2fs_sync_inode_meta(sbi);
1278 if (err)
1279 return err;
1280 cond_resched();
1281 goto retry_flush_quotas;
1282 }
1283
1284 retry_flush_nodes:
1285 f2fs_down_write(&sbi->node_write);
1286
1287 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
1288 f2fs_up_write(&sbi->node_write);
1289 atomic_inc(&sbi->wb_sync_req[NODE]);
1290 err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO);
1291 atomic_dec(&sbi->wb_sync_req[NODE]);
1292 if (err) {
1293 f2fs_up_write(&sbi->node_change);
1294 f2fs_unlock_all(sbi);
1295 return err;
1296 }
1297 cond_resched();
1298 goto retry_flush_nodes;
1299 }
1300
1301 /*
1302 * sbi->node_change is used only for AIO write_begin path which produces
1303 * dirty node blocks and some checkpoint values by block allocation.
1304 */
1305 __prepare_cp_block(sbi);
1306 f2fs_up_write(&sbi->node_change);
1307 return err;
1308 }
1309
1310 static void unblock_operations(struct f2fs_sb_info *sbi)
1311 {
1312 f2fs_up_write(&sbi->node_write);
1313 f2fs_unlock_all(sbi);
1314 }
1315
1316 void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type)
1317 {
1318 DEFINE_WAIT(wait);
1319
1320 for (;;) {
1321 if (!get_pages(sbi, type))
1322 break;
1323
1324 if (unlikely(f2fs_cp_error(sbi) &&
1325 !is_sbi_flag_set(sbi, SBI_IS_CLOSE)))
1326 break;
1327
1328 if (type == F2FS_DIRTY_META)
1329 f2fs_sync_meta_pages(sbi, META, LONG_MAX,
1330 FS_CP_META_IO);
1331 else if (type == F2FS_WB_CP_DATA)
1332 f2fs_submit_merged_write(sbi, DATA);
1333
1334 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
1335 io_schedule_timeout(DEFAULT_IO_TIMEOUT);
1336 }
1337 finish_wait(&sbi->cp_wait, &wait);
1338 }
1339
1340 static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1341 {
1342 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1343 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1344 unsigned long flags;
1345
1346 if (cpc->reason & CP_UMOUNT) {
1347 if (le32_to_cpu(ckpt->cp_pack_total_block_count) +
1348 NM_I(sbi)->nat_bits_blocks > BLKS_PER_SEG(sbi)) {
1349 clear_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
1350 f2fs_notice(sbi, "Disable nat_bits due to no space");
1351 } else if (!is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG) &&
1352 f2fs_nat_bitmap_enabled(sbi)) {
1353 f2fs_enable_nat_bits(sbi);
1354 set_ckpt_flags(sbi, CP_NAT_BITS_FLAG);
1355 f2fs_notice(sbi, "Rebuild and enable nat_bits");
1356 }
1357 }
1358
1359 spin_lock_irqsave(&sbi->cp_lock, flags);
1360
1361 if (cpc->reason & CP_TRIMMED)
1362 __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1363 else
1364 __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1365
1366 if (cpc->reason & CP_UMOUNT)
1367 __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1368 else
1369 __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1370
1371 if (cpc->reason & CP_FASTBOOT)
1372 __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1373 else
1374 __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1375
1376 if (orphan_num)
1377 __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1378 else
1379 __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1380
1381 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1382 __set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1383
1384 if (is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
1385 __set_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
1386 else
1387 __clear_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
1388
1389 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
1390 __set_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1391 else
1392 __clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1393
1394 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
1395 __set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1396 else
1397 __clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1398
1399 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
1400 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1401 else
1402 __clear_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1403
1404 if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
1405 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1406
1407 /* set this flag to activate crc|cp_ver for recovery */
1408 __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
1409 __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
1410
1411 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1412 }
1413
1414 static void commit_checkpoint(struct f2fs_sb_info *sbi,
1415 void *src, block_t blk_addr)
1416 {
1417 struct writeback_control wbc = {
1418 .for_reclaim = 0,
1419 };
1420
1421 /*
1422 * filemap_get_folios_tag and lock_page again will take
1423 * some extra time. Therefore, f2fs_update_meta_pages and
1424 * f2fs_sync_meta_pages are combined in this function.
1425 */
1426 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
1427 int err;
1428
1429 f2fs_wait_on_page_writeback(page, META, true, true);
1430
1431 memcpy(page_address(page), src, PAGE_SIZE);
1432
1433 set_page_dirty(page);
1434 if (unlikely(!clear_page_dirty_for_io(page)))
1435 f2fs_bug_on(sbi, 1);
1436
1437 /* writeout cp pack 2 page */
1438 err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO);
1439 if (unlikely(err && f2fs_cp_error(sbi))) {
1440 f2fs_put_page(page, 1);
1441 return;
1442 }
1443
1444 f2fs_bug_on(sbi, err);
1445 f2fs_put_page(page, 0);
1446
1447 /* submit checkpoint (with barrier if NOBARRIER is not set) */
1448 f2fs_submit_merged_write(sbi, META_FLUSH);
1449 }
1450
1451 static inline u64 get_sectors_written(struct block_device *bdev)
1452 {
1453 return (u64)part_stat_read(bdev, sectors[STAT_WRITE]);
1454 }
1455
1456 u64 f2fs_get_sectors_written(struct f2fs_sb_info *sbi)
1457 {
1458 if (f2fs_is_multi_device(sbi)) {
1459 u64 sectors = 0;
1460 int i;
1461
1462 for (i = 0; i < sbi->s_ndevs; i++)
1463 sectors += get_sectors_written(FDEV(i).bdev);
1464
1465 return sectors;
1466 }
1467
1468 return get_sectors_written(sbi->sb->s_bdev);
1469 }
1470
1471 static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1472 {
1473 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1474 struct f2fs_nm_info *nm_i = NM_I(sbi);
1475 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags;
1476 block_t start_blk;
1477 unsigned int data_sum_blocks, orphan_blocks;
1478 __u32 crc32 = 0;
1479 int i;
1480 int cp_payload_blks = __cp_payload(sbi);
1481 struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1482 u64 kbytes_written;
1483 int err;
1484
1485 /* Flush all the NAT/SIT pages */
1486 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1487
1488 /* start to update checkpoint, cp ver is already updated previously */
1489 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
1490 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
1491 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1492 struct curseg_info *curseg = CURSEG_I(sbi, i + CURSEG_HOT_NODE);
1493
1494 ckpt->cur_node_segno[i] = cpu_to_le32(curseg->segno);
1495 ckpt->cur_node_blkoff[i] = cpu_to_le16(curseg->next_blkoff);
1496 ckpt->alloc_type[i + CURSEG_HOT_NODE] = curseg->alloc_type;
1497 }
1498 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1499 struct curseg_info *curseg = CURSEG_I(sbi, i + CURSEG_HOT_DATA);
1500
1501 ckpt->cur_data_segno[i] = cpu_to_le32(curseg->segno);
1502 ckpt->cur_data_blkoff[i] = cpu_to_le16(curseg->next_blkoff);
1503 ckpt->alloc_type[i + CURSEG_HOT_DATA] = curseg->alloc_type;
1504 }
1505
1506 /* 2 cp + n data seg summary + orphan inode blocks */
1507 data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false);
1508 spin_lock_irqsave(&sbi->cp_lock, flags);
1509 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
1510 __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1511 else
1512 __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1513 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1514
1515 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
1516 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
1517 orphan_blocks);
1518
1519 if (__remain_node_summaries(cpc->reason))
1520 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1521 cp_payload_blks + data_sum_blocks +
1522 orphan_blocks + NR_CURSEG_NODE_TYPE);
1523 else
1524 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1525 cp_payload_blks + data_sum_blocks +
1526 orphan_blocks);
1527
1528 /* update ckpt flag for checkpoint */
1529 update_ckpt_flags(sbi, cpc);
1530
1531 /* update SIT/NAT bitmap */
1532 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1533 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1534
1535 crc32 = f2fs_checkpoint_chksum(sbi, ckpt);
1536 *((__le32 *)((unsigned char *)ckpt +
1537 le32_to_cpu(ckpt->checksum_offset)))
1538 = cpu_to_le32(crc32);
1539
1540 start_blk = __start_cp_next_addr(sbi);
1541
1542 /* write nat bits */
1543 if ((cpc->reason & CP_UMOUNT) &&
1544 is_set_ckpt_flags(sbi, CP_NAT_BITS_FLAG)) {
1545 __u64 cp_ver = cur_cp_version(ckpt);
1546 block_t blk;
1547
1548 cp_ver |= ((__u64)crc32 << 32);
1549 *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver);
1550
1551 blk = start_blk + BLKS_PER_SEG(sbi) - nm_i->nat_bits_blocks;
1552 for (i = 0; i < nm_i->nat_bits_blocks; i++)
1553 f2fs_update_meta_page(sbi, nm_i->nat_bits +
1554 (i << F2FS_BLKSIZE_BITS), blk + i);
1555 }
1556
1557 /* write out checkpoint buffer at block 0 */
1558 f2fs_update_meta_page(sbi, ckpt, start_blk++);
1559
1560 for (i = 1; i < 1 + cp_payload_blks; i++)
1561 f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1562 start_blk++);
1563
1564 if (orphan_num) {
1565 write_orphan_inodes(sbi, start_blk);
1566 start_blk += orphan_blocks;
1567 }
1568
1569 f2fs_write_data_summaries(sbi, start_blk);
1570 start_blk += data_sum_blocks;
1571
1572 /* Record write statistics in the hot node summary */
1573 kbytes_written = sbi->kbytes_written;
1574 kbytes_written += (f2fs_get_sectors_written(sbi) -
1575 sbi->sectors_written_start) >> 1;
1576 seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1577
1578 if (__remain_node_summaries(cpc->reason)) {
1579 f2fs_write_node_summaries(sbi, start_blk);
1580 start_blk += NR_CURSEG_NODE_TYPE;
1581 }
1582
1583 /* Here, we have one bio having CP pack except cp pack 2 page */
1584 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1585 /* Wait for all dirty meta pages to be submitted for IO */
1586 f2fs_wait_on_all_pages(sbi, F2FS_DIRTY_META);
1587
1588 /* wait for previous submitted meta pages writeback */
1589 f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1590
1591 /* flush all device cache */
1592 err = f2fs_flush_device_cache(sbi);
1593 if (err)
1594 return err;
1595
1596 /* barrier and flush checkpoint cp pack 2 page if it can */
1597 commit_checkpoint(sbi, ckpt, start_blk);
1598 f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1599
1600 /*
1601 * invalidate intermediate page cache borrowed from meta inode which are
1602 * used for migration of encrypted, verity or compressed inode's blocks.
1603 */
1604 if (f2fs_sb_has_encrypt(sbi) || f2fs_sb_has_verity(sbi) ||
1605 f2fs_sb_has_compression(sbi))
1606 f2fs_bug_on(sbi,
1607 invalidate_inode_pages2_range(META_MAPPING(sbi),
1608 MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1));
1609
1610 f2fs_release_ino_entry(sbi, false);
1611
1612 f2fs_reset_fsync_node_info(sbi);
1613
1614 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1615 clear_sbi_flag(sbi, SBI_NEED_CP);
1616 clear_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1617
1618 spin_lock(&sbi->stat_lock);
1619 sbi->unusable_block_count = 0;
1620 spin_unlock(&sbi->stat_lock);
1621
1622 __set_cp_next_pack(sbi);
1623
1624 /*
1625 * redirty superblock if metadata like node page or inode cache is
1626 * updated during writing checkpoint.
1627 */
1628 if (get_pages(sbi, F2FS_DIRTY_NODES) ||
1629 get_pages(sbi, F2FS_DIRTY_IMETA))
1630 set_sbi_flag(sbi, SBI_IS_DIRTY);
1631
1632 f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
1633
1634 return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
1635 }
1636
1637 int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1638 {
1639 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1640 unsigned long long ckpt_ver;
1641 int err = 0;
1642
1643 if (f2fs_readonly(sbi->sb) || f2fs_hw_is_readonly(sbi))
1644 return -EROFS;
1645
1646 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1647 if (cpc->reason != CP_PAUSE)
1648 return 0;
1649 f2fs_warn(sbi, "Start checkpoint disabled!");
1650 }
1651 if (cpc->reason != CP_RESIZE)
1652 f2fs_down_write(&sbi->cp_global_sem);
1653
1654 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1655 ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
1656 ((cpc->reason & CP_DISCARD) && !sbi->discard_blks)))
1657 goto out;
1658 if (unlikely(f2fs_cp_error(sbi))) {
1659 err = -EIO;
1660 goto out;
1661 }
1662
1663 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1664
1665 err = block_operations(sbi);
1666 if (err)
1667 goto out;
1668
1669 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1670
1671 f2fs_flush_merged_writes(sbi);
1672
1673 /* this is the case of multiple fstrims without any changes */
1674 if (cpc->reason & CP_DISCARD) {
1675 if (!f2fs_exist_trim_candidates(sbi, cpc)) {
1676 unblock_operations(sbi);
1677 goto out;
1678 }
1679
1680 if (NM_I(sbi)->nat_cnt[DIRTY_NAT] == 0 &&
1681 SIT_I(sbi)->dirty_sentries == 0 &&
1682 prefree_segments(sbi) == 0) {
1683 f2fs_flush_sit_entries(sbi, cpc);
1684 f2fs_clear_prefree_segments(sbi, cpc);
1685 unblock_operations(sbi);
1686 goto out;
1687 }
1688 }
1689
1690 /*
1691 * update checkpoint pack index
1692 * Increase the version number so that
1693 * SIT entries and seg summaries are written at correct place
1694 */
1695 ckpt_ver = cur_cp_version(ckpt);
1696 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1697
1698 /* write cached NAT/SIT entries to NAT/SIT area */
1699 err = f2fs_flush_nat_entries(sbi, cpc);
1700 if (err) {
1701 f2fs_err(sbi, "f2fs_flush_nat_entries failed err:%d, stop checkpoint", err);
1702 f2fs_bug_on(sbi, !f2fs_cp_error(sbi));
1703 goto stop;
1704 }
1705
1706 f2fs_flush_sit_entries(sbi, cpc);
1707
1708 /* save inmem log status */
1709 f2fs_save_inmem_curseg(sbi);
1710
1711 err = do_checkpoint(sbi, cpc);
1712 if (err) {
1713 f2fs_err(sbi, "do_checkpoint failed err:%d, stop checkpoint", err);
1714 f2fs_bug_on(sbi, !f2fs_cp_error(sbi));
1715 f2fs_release_discard_addrs(sbi);
1716 } else {
1717 f2fs_clear_prefree_segments(sbi, cpc);
1718 }
1719
1720 f2fs_restore_inmem_curseg(sbi);
1721 f2fs_reinit_atgc_curseg(sbi);
1722 stat_inc_cp_count(sbi);
1723 stop:
1724 unblock_operations(sbi);
1725
1726 if (cpc->reason & CP_RECOVERY)
1727 f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
1728
1729 /* update CP_TIME to trigger checkpoint periodically */
1730 f2fs_update_time(sbi, CP_TIME);
1731 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1732 out:
1733 if (cpc->reason != CP_RESIZE)
1734 f2fs_up_write(&sbi->cp_global_sem);
1735 return err;
1736 }
1737
1738 void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi)
1739 {
1740 int i;
1741
1742 for (i = 0; i < MAX_INO_ENTRY; i++) {
1743 struct inode_management *im = &sbi->im[i];
1744
1745 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1746 spin_lock_init(&im->ino_lock);
1747 INIT_LIST_HEAD(&im->ino_list);
1748 im->ino_num = 0;
1749 }
1750
1751 sbi->max_orphans = (BLKS_PER_SEG(sbi) - F2FS_CP_PACKS -
1752 NR_CURSEG_PERSIST_TYPE - __cp_payload(sbi)) *
1753 F2FS_ORPHANS_PER_BLOCK;
1754 }
1755
1756 int __init f2fs_create_checkpoint_caches(void)
1757 {
1758 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1759 sizeof(struct ino_entry));
1760 if (!ino_entry_slab)
1761 return -ENOMEM;
1762 f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1763 sizeof(struct inode_entry));
1764 if (!f2fs_inode_entry_slab) {
1765 kmem_cache_destroy(ino_entry_slab);
1766 return -ENOMEM;
1767 }
1768 return 0;
1769 }
1770
1771 void f2fs_destroy_checkpoint_caches(void)
1772 {
1773 kmem_cache_destroy(ino_entry_slab);
1774 kmem_cache_destroy(f2fs_inode_entry_slab);
1775 }
1776
1777 static int __write_checkpoint_sync(struct f2fs_sb_info *sbi)
1778 {
1779 struct cp_control cpc = { .reason = CP_SYNC, };
1780 int err;
1781
1782 f2fs_down_write(&sbi->gc_lock);
1783 err = f2fs_write_checkpoint(sbi, &cpc);
1784 f2fs_up_write(&sbi->gc_lock);
1785
1786 return err;
1787 }
1788
1789 static void __checkpoint_and_complete_reqs(struct f2fs_sb_info *sbi)
1790 {
1791 struct ckpt_req_control *cprc = &sbi->cprc_info;
1792 struct ckpt_req *req, *next;
1793 struct llist_node *dispatch_list;
1794 u64 sum_diff = 0, diff, count = 0;
1795 int ret;
1796
1797 dispatch_list = llist_del_all(&cprc->issue_list);
1798 if (!dispatch_list)
1799 return;
1800 dispatch_list = llist_reverse_order(dispatch_list);
1801
1802 ret = __write_checkpoint_sync(sbi);
1803 atomic_inc(&cprc->issued_ckpt);
1804
1805 llist_for_each_entry_safe(req, next, dispatch_list, llnode) {
1806 diff = (u64)ktime_ms_delta(ktime_get(), req->queue_time);
1807 req->ret = ret;
1808 complete(&req->wait);
1809
1810 sum_diff += diff;
1811 count++;
1812 }
1813 atomic_sub(count, &cprc->queued_ckpt);
1814 atomic_add(count, &cprc->total_ckpt);
1815
1816 spin_lock(&cprc->stat_lock);
1817 cprc->cur_time = (unsigned int)div64_u64(sum_diff, count);
1818 if (cprc->peak_time < cprc->cur_time)
1819 cprc->peak_time = cprc->cur_time;
1820 spin_unlock(&cprc->stat_lock);
1821 }
1822
1823 static int issue_checkpoint_thread(void *data)
1824 {
1825 struct f2fs_sb_info *sbi = data;
1826 struct ckpt_req_control *cprc = &sbi->cprc_info;
1827 wait_queue_head_t *q = &cprc->ckpt_wait_queue;
1828 repeat:
1829 if (kthread_should_stop())
1830 return 0;
1831
1832 if (!llist_empty(&cprc->issue_list))
1833 __checkpoint_and_complete_reqs(sbi);
1834
1835 wait_event_interruptible(*q,
1836 kthread_should_stop() || !llist_empty(&cprc->issue_list));
1837 goto repeat;
1838 }
1839
1840 static void flush_remained_ckpt_reqs(struct f2fs_sb_info *sbi,
1841 struct ckpt_req *wait_req)
1842 {
1843 struct ckpt_req_control *cprc = &sbi->cprc_info;
1844
1845 if (!llist_empty(&cprc->issue_list)) {
1846 __checkpoint_and_complete_reqs(sbi);
1847 } else {
1848 /* already dispatched by issue_checkpoint_thread */
1849 if (wait_req)
1850 wait_for_completion(&wait_req->wait);
1851 }
1852 }
1853
1854 static void init_ckpt_req(struct ckpt_req *req)
1855 {
1856 memset(req, 0, sizeof(struct ckpt_req));
1857
1858 init_completion(&req->wait);
1859 req->queue_time = ktime_get();
1860 }
1861
1862 int f2fs_issue_checkpoint(struct f2fs_sb_info *sbi)
1863 {
1864 struct ckpt_req_control *cprc = &sbi->cprc_info;
1865 struct ckpt_req req;
1866 struct cp_control cpc;
1867
1868 cpc.reason = __get_cp_reason(sbi);
1869 if (!test_opt(sbi, MERGE_CHECKPOINT) || cpc.reason != CP_SYNC) {
1870 int ret;
1871
1872 f2fs_down_write(&sbi->gc_lock);
1873 ret = f2fs_write_checkpoint(sbi, &cpc);
1874 f2fs_up_write(&sbi->gc_lock);
1875
1876 return ret;
1877 }
1878
1879 if (!cprc->f2fs_issue_ckpt)
1880 return __write_checkpoint_sync(sbi);
1881
1882 init_ckpt_req(&req);
1883
1884 llist_add(&req.llnode, &cprc->issue_list);
1885 atomic_inc(&cprc->queued_ckpt);
1886
1887 /*
1888 * update issue_list before we wake up issue_checkpoint thread,
1889 * this smp_mb() pairs with another barrier in ___wait_event(),
1890 * see more details in comments of waitqueue_active().
1891 */
1892 smp_mb();
1893
1894 if (waitqueue_active(&cprc->ckpt_wait_queue))
1895 wake_up(&cprc->ckpt_wait_queue);
1896
1897 if (cprc->f2fs_issue_ckpt)
1898 wait_for_completion(&req.wait);
1899 else
1900 flush_remained_ckpt_reqs(sbi, &req);
1901
1902 return req.ret;
1903 }
1904
1905 int f2fs_start_ckpt_thread(struct f2fs_sb_info *sbi)
1906 {
1907 dev_t dev = sbi->sb->s_bdev->bd_dev;
1908 struct ckpt_req_control *cprc = &sbi->cprc_info;
1909
1910 if (cprc->f2fs_issue_ckpt)
1911 return 0;
1912
1913 cprc->f2fs_issue_ckpt = kthread_run(issue_checkpoint_thread, sbi,
1914 "f2fs_ckpt-%u:%u", MAJOR(dev), MINOR(dev));
1915 if (IS_ERR(cprc->f2fs_issue_ckpt)) {
1916 int err = PTR_ERR(cprc->f2fs_issue_ckpt);
1917
1918 cprc->f2fs_issue_ckpt = NULL;
1919 return err;
1920 }
1921
1922 set_task_ioprio(cprc->f2fs_issue_ckpt, cprc->ckpt_thread_ioprio);
1923
1924 return 0;
1925 }
1926
1927 void f2fs_stop_ckpt_thread(struct f2fs_sb_info *sbi)
1928 {
1929 struct ckpt_req_control *cprc = &sbi->cprc_info;
1930 struct task_struct *ckpt_task;
1931
1932 if (!cprc->f2fs_issue_ckpt)
1933 return;
1934
1935 ckpt_task = cprc->f2fs_issue_ckpt;
1936 cprc->f2fs_issue_ckpt = NULL;
1937 kthread_stop(ckpt_task);
1938
1939 f2fs_flush_ckpt_thread(sbi);
1940 }
1941
1942 void f2fs_flush_ckpt_thread(struct f2fs_sb_info *sbi)
1943 {
1944 struct ckpt_req_control *cprc = &sbi->cprc_info;
1945
1946 flush_remained_ckpt_reqs(sbi, NULL);
1947
1948 /* Let's wait for the previous dispatched checkpoint. */
1949 while (atomic_read(&cprc->queued_ckpt))
1950 io_schedule_timeout(DEFAULT_IO_TIMEOUT);
1951 }
1952
1953 void f2fs_init_ckpt_req_control(struct f2fs_sb_info *sbi)
1954 {
1955 struct ckpt_req_control *cprc = &sbi->cprc_info;
1956
1957 atomic_set(&cprc->issued_ckpt, 0);
1958 atomic_set(&cprc->total_ckpt, 0);
1959 atomic_set(&cprc->queued_ckpt, 0);
1960 cprc->ckpt_thread_ioprio = DEFAULT_CHECKPOINT_IOPRIO;
1961 init_waitqueue_head(&cprc->ckpt_wait_queue);
1962 init_llist_head(&cprc->issue_list);
1963 spin_lock_init(&cprc->stat_lock);
1964 }
1965
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