Loading...
Note: File does not exist in v3.1.
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
17#include "f2fs.h"
18#include "node.h"
19#include "segment.h"
20#include "trace.h"
21#include <trace/events/f2fs.h>
22
23static struct kmem_cache *ino_entry_slab;
24struct kmem_cache *f2fs_inode_entry_slab;
25
26void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io)
27{
28 f2fs_build_fault_attr(sbi, 0, 0);
29 set_ckpt_flags(sbi, CP_ERROR_FLAG);
30 if (!end_io)
31 f2fs_flush_merged_writes(sbi);
32}
33
34/*
35 * We guarantee no failure on the returned page.
36 */
37struct page *f2fs_grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
38{
39 struct address_space *mapping = META_MAPPING(sbi);
40 struct page *page = NULL;
41repeat:
42 page = f2fs_grab_cache_page(mapping, index, false);
43 if (!page) {
44 cond_resched();
45 goto repeat;
46 }
47 f2fs_wait_on_page_writeback(page, META, true, true);
48 if (!PageUptodate(page))
49 SetPageUptodate(page);
50 return page;
51}
52
53static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
54 bool is_meta)
55{
56 struct address_space *mapping = META_MAPPING(sbi);
57 struct page *page;
58 struct f2fs_io_info fio = {
59 .sbi = sbi,
60 .type = META,
61 .op = REQ_OP_READ,
62 .op_flags = REQ_META | REQ_PRIO,
63 .old_blkaddr = index,
64 .new_blkaddr = index,
65 .encrypted_page = NULL,
66 .is_por = !is_meta,
67 };
68 int err;
69
70 if (unlikely(!is_meta))
71 fio.op_flags &= ~REQ_META;
72repeat:
73 page = f2fs_grab_cache_page(mapping, index, false);
74 if (!page) {
75 cond_resched();
76 goto repeat;
77 }
78 if (PageUptodate(page))
79 goto out;
80
81 fio.page = page;
82
83 err = f2fs_submit_page_bio(&fio);
84 if (err) {
85 f2fs_put_page(page, 1);
86 return ERR_PTR(err);
87 }
88
89 f2fs_update_iostat(sbi, FS_META_READ_IO, F2FS_BLKSIZE);
90
91 lock_page(page);
92 if (unlikely(page->mapping != mapping)) {
93 f2fs_put_page(page, 1);
94 goto repeat;
95 }
96
97 if (unlikely(!PageUptodate(page))) {
98 f2fs_put_page(page, 1);
99 return ERR_PTR(-EIO);
100 }
101out:
102 return page;
103}
104
105struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
106{
107 return __get_meta_page(sbi, index, true);
108}
109
110struct page *f2fs_get_meta_page_nofail(struct f2fs_sb_info *sbi, pgoff_t index)
111{
112 struct page *page;
113 int count = 0;
114
115retry:
116 page = __get_meta_page(sbi, index, true);
117 if (IS_ERR(page)) {
118 if (PTR_ERR(page) == -EIO &&
119 ++count <= DEFAULT_RETRY_IO_COUNT)
120 goto retry;
121 f2fs_stop_checkpoint(sbi, false);
122 }
123 return page;
124}
125
126/* for POR only */
127struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
128{
129 return __get_meta_page(sbi, index, false);
130}
131
132static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
133 int type)
134{
135 struct seg_entry *se;
136 unsigned int segno, offset;
137 bool exist;
138
139 if (type != DATA_GENERIC_ENHANCE && type != DATA_GENERIC_ENHANCE_READ)
140 return true;
141
142 segno = GET_SEGNO(sbi, blkaddr);
143 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
144 se = get_seg_entry(sbi, segno);
145
146 exist = f2fs_test_bit(offset, se->cur_valid_map);
147 if (!exist && type == DATA_GENERIC_ENHANCE) {
148 f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
149 blkaddr, exist);
150 set_sbi_flag(sbi, SBI_NEED_FSCK);
151 WARN_ON(1);
152 }
153 return exist;
154}
155
156bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
157 block_t blkaddr, int type)
158{
159 switch (type) {
160 case META_NAT:
161 break;
162 case META_SIT:
163 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
164 return false;
165 break;
166 case META_SSA:
167 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
168 blkaddr < SM_I(sbi)->ssa_blkaddr))
169 return false;
170 break;
171 case META_CP:
172 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
173 blkaddr < __start_cp_addr(sbi)))
174 return false;
175 break;
176 case META_POR:
177 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
178 blkaddr < MAIN_BLKADDR(sbi)))
179 return false;
180 break;
181 case DATA_GENERIC:
182 case DATA_GENERIC_ENHANCE:
183 case DATA_GENERIC_ENHANCE_READ:
184 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
185 blkaddr < MAIN_BLKADDR(sbi))) {
186 f2fs_warn(sbi, "access invalid blkaddr:%u",
187 blkaddr);
188 set_sbi_flag(sbi, SBI_NEED_FSCK);
189 WARN_ON(1);
190 return false;
191 } else {
192 return __is_bitmap_valid(sbi, blkaddr, type);
193 }
194 break;
195 case META_GENERIC:
196 if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
197 blkaddr >= MAIN_BLKADDR(sbi)))
198 return false;
199 break;
200 default:
201 BUG();
202 }
203
204 return true;
205}
206
207/*
208 * Readahead CP/NAT/SIT/SSA/POR pages
209 */
210int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
211 int type, bool sync)
212{
213 struct page *page;
214 block_t blkno = start;
215 struct f2fs_io_info fio = {
216 .sbi = sbi,
217 .type = META,
218 .op = REQ_OP_READ,
219 .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
220 .encrypted_page = NULL,
221 .in_list = false,
222 .is_por = (type == META_POR),
223 };
224 struct blk_plug plug;
225 int err;
226
227 if (unlikely(type == META_POR))
228 fio.op_flags &= ~REQ_META;
229
230 blk_start_plug(&plug);
231 for (; nrpages-- > 0; blkno++) {
232
233 if (!f2fs_is_valid_blkaddr(sbi, blkno, type))
234 goto out;
235
236 switch (type) {
237 case META_NAT:
238 if (unlikely(blkno >=
239 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
240 blkno = 0;
241 /* get nat block addr */
242 fio.new_blkaddr = current_nat_addr(sbi,
243 blkno * NAT_ENTRY_PER_BLOCK);
244 break;
245 case META_SIT:
246 /* get sit block addr */
247 fio.new_blkaddr = current_sit_addr(sbi,
248 blkno * SIT_ENTRY_PER_BLOCK);
249 break;
250 case META_SSA:
251 case META_CP:
252 case META_POR:
253 fio.new_blkaddr = blkno;
254 break;
255 default:
256 BUG();
257 }
258
259 page = f2fs_grab_cache_page(META_MAPPING(sbi),
260 fio.new_blkaddr, false);
261 if (!page)
262 continue;
263 if (PageUptodate(page)) {
264 f2fs_put_page(page, 1);
265 continue;
266 }
267
268 fio.page = page;
269 err = f2fs_submit_page_bio(&fio);
270 f2fs_put_page(page, err ? 1 : 0);
271
272 if (!err)
273 f2fs_update_iostat(sbi, FS_META_READ_IO, F2FS_BLKSIZE);
274 }
275out:
276 blk_finish_plug(&plug);
277 return blkno - start;
278}
279
280void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
281{
282 struct page *page;
283 bool readahead = false;
284
285 page = find_get_page(META_MAPPING(sbi), index);
286 if (!page || !PageUptodate(page))
287 readahead = true;
288 f2fs_put_page(page, 0);
289
290 if (readahead)
291 f2fs_ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
292}
293
294static int __f2fs_write_meta_page(struct page *page,
295 struct writeback_control *wbc,
296 enum iostat_type io_type)
297{
298 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
299
300 trace_f2fs_writepage(page, META);
301
302 if (unlikely(f2fs_cp_error(sbi)))
303 goto redirty_out;
304 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
305 goto redirty_out;
306 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
307 goto redirty_out;
308
309 f2fs_do_write_meta_page(sbi, page, io_type);
310 dec_page_count(sbi, F2FS_DIRTY_META);
311
312 if (wbc->for_reclaim)
313 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, META);
314
315 unlock_page(page);
316
317 if (unlikely(f2fs_cp_error(sbi)))
318 f2fs_submit_merged_write(sbi, META);
319
320 return 0;
321
322redirty_out:
323 redirty_page_for_writepage(wbc, page);
324 return AOP_WRITEPAGE_ACTIVATE;
325}
326
327static int f2fs_write_meta_page(struct page *page,
328 struct writeback_control *wbc)
329{
330 return __f2fs_write_meta_page(page, wbc, FS_META_IO);
331}
332
333static int f2fs_write_meta_pages(struct address_space *mapping,
334 struct writeback_control *wbc)
335{
336 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
337 long diff, written;
338
339 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
340 goto skip_write;
341
342 /* collect a number of dirty meta pages and write together */
343 if (wbc->sync_mode != WB_SYNC_ALL &&
344 get_pages(sbi, F2FS_DIRTY_META) <
345 nr_pages_to_skip(sbi, META))
346 goto skip_write;
347
348 /* if locked failed, cp will flush dirty pages instead */
349 if (!mutex_trylock(&sbi->cp_mutex))
350 goto skip_write;
351
352 trace_f2fs_writepages(mapping->host, wbc, META);
353 diff = nr_pages_to_write(sbi, META, wbc);
354 written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO);
355 mutex_unlock(&sbi->cp_mutex);
356 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
357 return 0;
358
359skip_write:
360 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
361 trace_f2fs_writepages(mapping->host, wbc, META);
362 return 0;
363}
364
365long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
366 long nr_to_write, enum iostat_type io_type)
367{
368 struct address_space *mapping = META_MAPPING(sbi);
369 pgoff_t index = 0, prev = ULONG_MAX;
370 struct pagevec pvec;
371 long nwritten = 0;
372 int nr_pages;
373 struct writeback_control wbc = {
374 .for_reclaim = 0,
375 };
376 struct blk_plug plug;
377
378 pagevec_init(&pvec);
379
380 blk_start_plug(&plug);
381
382 while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
383 PAGECACHE_TAG_DIRTY))) {
384 int i;
385
386 for (i = 0; i < nr_pages; i++) {
387 struct page *page = pvec.pages[i];
388
389 if (prev == ULONG_MAX)
390 prev = page->index - 1;
391 if (nr_to_write != LONG_MAX && page->index != prev + 1) {
392 pagevec_release(&pvec);
393 goto stop;
394 }
395
396 lock_page(page);
397
398 if (unlikely(page->mapping != mapping)) {
399continue_unlock:
400 unlock_page(page);
401 continue;
402 }
403 if (!PageDirty(page)) {
404 /* someone wrote it for us */
405 goto continue_unlock;
406 }
407
408 f2fs_wait_on_page_writeback(page, META, true, true);
409
410 if (!clear_page_dirty_for_io(page))
411 goto continue_unlock;
412
413 if (__f2fs_write_meta_page(page, &wbc, io_type)) {
414 unlock_page(page);
415 break;
416 }
417 nwritten++;
418 prev = page->index;
419 if (unlikely(nwritten >= nr_to_write))
420 break;
421 }
422 pagevec_release(&pvec);
423 cond_resched();
424 }
425stop:
426 if (nwritten)
427 f2fs_submit_merged_write(sbi, type);
428
429 blk_finish_plug(&plug);
430
431 return nwritten;
432}
433
434static int f2fs_set_meta_page_dirty(struct page *page)
435{
436 trace_f2fs_set_page_dirty(page, META);
437
438 if (!PageUptodate(page))
439 SetPageUptodate(page);
440 if (!PageDirty(page)) {
441 __set_page_dirty_nobuffers(page);
442 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
443 f2fs_set_page_private(page, 0);
444 f2fs_trace_pid(page);
445 return 1;
446 }
447 return 0;
448}
449
450const struct address_space_operations f2fs_meta_aops = {
451 .writepage = f2fs_write_meta_page,
452 .writepages = f2fs_write_meta_pages,
453 .set_page_dirty = f2fs_set_meta_page_dirty,
454 .invalidatepage = f2fs_invalidate_page,
455 .releasepage = f2fs_release_page,
456#ifdef CONFIG_MIGRATION
457 .migratepage = f2fs_migrate_page,
458#endif
459};
460
461static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
462 unsigned int devidx, int type)
463{
464 struct inode_management *im = &sbi->im[type];
465 struct ino_entry *e, *tmp;
466
467 tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
468
469 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
470
471 spin_lock(&im->ino_lock);
472 e = radix_tree_lookup(&im->ino_root, ino);
473 if (!e) {
474 e = tmp;
475 if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
476 f2fs_bug_on(sbi, 1);
477
478 memset(e, 0, sizeof(struct ino_entry));
479 e->ino = ino;
480
481 list_add_tail(&e->list, &im->ino_list);
482 if (type != ORPHAN_INO)
483 im->ino_num++;
484 }
485
486 if (type == FLUSH_INO)
487 f2fs_set_bit(devidx, (char *)&e->dirty_device);
488
489 spin_unlock(&im->ino_lock);
490 radix_tree_preload_end();
491
492 if (e != tmp)
493 kmem_cache_free(ino_entry_slab, tmp);
494}
495
496static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
497{
498 struct inode_management *im = &sbi->im[type];
499 struct ino_entry *e;
500
501 spin_lock(&im->ino_lock);
502 e = radix_tree_lookup(&im->ino_root, ino);
503 if (e) {
504 list_del(&e->list);
505 radix_tree_delete(&im->ino_root, ino);
506 im->ino_num--;
507 spin_unlock(&im->ino_lock);
508 kmem_cache_free(ino_entry_slab, e);
509 return;
510 }
511 spin_unlock(&im->ino_lock);
512}
513
514void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
515{
516 /* add new dirty ino entry into list */
517 __add_ino_entry(sbi, ino, 0, type);
518}
519
520void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
521{
522 /* remove dirty ino entry from list */
523 __remove_ino_entry(sbi, ino, type);
524}
525
526/* mode should be APPEND_INO, UPDATE_INO or TRANS_DIR_INO */
527bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
528{
529 struct inode_management *im = &sbi->im[mode];
530 struct ino_entry *e;
531
532 spin_lock(&im->ino_lock);
533 e = radix_tree_lookup(&im->ino_root, ino);
534 spin_unlock(&im->ino_lock);
535 return e ? true : false;
536}
537
538void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all)
539{
540 struct ino_entry *e, *tmp;
541 int i;
542
543 for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; i++) {
544 struct inode_management *im = &sbi->im[i];
545
546 spin_lock(&im->ino_lock);
547 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
548 list_del(&e->list);
549 radix_tree_delete(&im->ino_root, e->ino);
550 kmem_cache_free(ino_entry_slab, e);
551 im->ino_num--;
552 }
553 spin_unlock(&im->ino_lock);
554 }
555}
556
557void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
558 unsigned int devidx, int type)
559{
560 __add_ino_entry(sbi, ino, devidx, type);
561}
562
563bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
564 unsigned int devidx, int type)
565{
566 struct inode_management *im = &sbi->im[type];
567 struct ino_entry *e;
568 bool is_dirty = false;
569
570 spin_lock(&im->ino_lock);
571 e = radix_tree_lookup(&im->ino_root, ino);
572 if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device))
573 is_dirty = true;
574 spin_unlock(&im->ino_lock);
575 return is_dirty;
576}
577
578int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi)
579{
580 struct inode_management *im = &sbi->im[ORPHAN_INO];
581 int err = 0;
582
583 spin_lock(&im->ino_lock);
584
585 if (time_to_inject(sbi, FAULT_ORPHAN)) {
586 spin_unlock(&im->ino_lock);
587 f2fs_show_injection_info(sbi, FAULT_ORPHAN);
588 return -ENOSPC;
589 }
590
591 if (unlikely(im->ino_num >= sbi->max_orphans))
592 err = -ENOSPC;
593 else
594 im->ino_num++;
595 spin_unlock(&im->ino_lock);
596
597 return err;
598}
599
600void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi)
601{
602 struct inode_management *im = &sbi->im[ORPHAN_INO];
603
604 spin_lock(&im->ino_lock);
605 f2fs_bug_on(sbi, im->ino_num == 0);
606 im->ino_num--;
607 spin_unlock(&im->ino_lock);
608}
609
610void f2fs_add_orphan_inode(struct inode *inode)
611{
612 /* add new orphan ino entry into list */
613 __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO);
614 f2fs_update_inode_page(inode);
615}
616
617void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
618{
619 /* remove orphan entry from orphan list */
620 __remove_ino_entry(sbi, ino, ORPHAN_INO);
621}
622
623static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
624{
625 struct inode *inode;
626 struct node_info ni;
627 int err;
628
629 inode = f2fs_iget_retry(sbi->sb, ino);
630 if (IS_ERR(inode)) {
631 /*
632 * there should be a bug that we can't find the entry
633 * to orphan inode.
634 */
635 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
636 return PTR_ERR(inode);
637 }
638
639 err = dquot_initialize(inode);
640 if (err) {
641 iput(inode);
642 goto err_out;
643 }
644
645 clear_nlink(inode);
646
647 /* truncate all the data during iput */
648 iput(inode);
649
650 err = f2fs_get_node_info(sbi, ino, &ni);
651 if (err)
652 goto err_out;
653
654 /* ENOMEM was fully retried in f2fs_evict_inode. */
655 if (ni.blk_addr != NULL_ADDR) {
656 err = -EIO;
657 goto err_out;
658 }
659 return 0;
660
661err_out:
662 set_sbi_flag(sbi, SBI_NEED_FSCK);
663 f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
664 __func__, ino);
665 return err;
666}
667
668int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
669{
670 block_t start_blk, orphan_blocks, i, j;
671 unsigned int s_flags = sbi->sb->s_flags;
672 int err = 0;
673#ifdef CONFIG_QUOTA
674 int quota_enabled;
675#endif
676
677 if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
678 return 0;
679
680 if (bdev_read_only(sbi->sb->s_bdev)) {
681 f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
682 return 0;
683 }
684
685 if (s_flags & SB_RDONLY) {
686 f2fs_info(sbi, "orphan cleanup on readonly fs");
687 sbi->sb->s_flags &= ~SB_RDONLY;
688 }
689
690#ifdef CONFIG_QUOTA
691 /* Needed for iput() to work correctly and not trash data */
692 sbi->sb->s_flags |= SB_ACTIVE;
693
694 /*
695 * Turn on quotas which were not enabled for read-only mounts if
696 * filesystem has quota feature, so that they are updated correctly.
697 */
698 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
699#endif
700
701 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
702 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
703
704 f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
705
706 for (i = 0; i < orphan_blocks; i++) {
707 struct page *page;
708 struct f2fs_orphan_block *orphan_blk;
709
710 page = f2fs_get_meta_page(sbi, start_blk + i);
711 if (IS_ERR(page)) {
712 err = PTR_ERR(page);
713 goto out;
714 }
715
716 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
717 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
718 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
719 err = recover_orphan_inode(sbi, ino);
720 if (err) {
721 f2fs_put_page(page, 1);
722 goto out;
723 }
724 }
725 f2fs_put_page(page, 1);
726 }
727 /* clear Orphan Flag */
728 clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
729out:
730 set_sbi_flag(sbi, SBI_IS_RECOVERED);
731
732#ifdef CONFIG_QUOTA
733 /* Turn quotas off */
734 if (quota_enabled)
735 f2fs_quota_off_umount(sbi->sb);
736#endif
737 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
738
739 return err;
740}
741
742static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
743{
744 struct list_head *head;
745 struct f2fs_orphan_block *orphan_blk = NULL;
746 unsigned int nentries = 0;
747 unsigned short index = 1;
748 unsigned short orphan_blocks;
749 struct page *page = NULL;
750 struct ino_entry *orphan = NULL;
751 struct inode_management *im = &sbi->im[ORPHAN_INO];
752
753 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
754
755 /*
756 * we don't need to do spin_lock(&im->ino_lock) here, since all the
757 * orphan inode operations are covered under f2fs_lock_op().
758 * And, spin_lock should be avoided due to page operations below.
759 */
760 head = &im->ino_list;
761
762 /* loop for each orphan inode entry and write them in Jornal block */
763 list_for_each_entry(orphan, head, list) {
764 if (!page) {
765 page = f2fs_grab_meta_page(sbi, start_blk++);
766 orphan_blk =
767 (struct f2fs_orphan_block *)page_address(page);
768 memset(orphan_blk, 0, sizeof(*orphan_blk));
769 }
770
771 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
772
773 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
774 /*
775 * an orphan block is full of 1020 entries,
776 * then we need to flush current orphan blocks
777 * and bring another one in memory
778 */
779 orphan_blk->blk_addr = cpu_to_le16(index);
780 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
781 orphan_blk->entry_count = cpu_to_le32(nentries);
782 set_page_dirty(page);
783 f2fs_put_page(page, 1);
784 index++;
785 nentries = 0;
786 page = NULL;
787 }
788 }
789
790 if (page) {
791 orphan_blk->blk_addr = cpu_to_le16(index);
792 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
793 orphan_blk->entry_count = cpu_to_le32(nentries);
794 set_page_dirty(page);
795 f2fs_put_page(page, 1);
796 }
797}
798
799static __u32 f2fs_checkpoint_chksum(struct f2fs_sb_info *sbi,
800 struct f2fs_checkpoint *ckpt)
801{
802 unsigned int chksum_ofs = le32_to_cpu(ckpt->checksum_offset);
803 __u32 chksum;
804
805 chksum = f2fs_crc32(sbi, ckpt, chksum_ofs);
806 if (chksum_ofs < CP_CHKSUM_OFFSET) {
807 chksum_ofs += sizeof(chksum);
808 chksum = f2fs_chksum(sbi, chksum, (__u8 *)ckpt + chksum_ofs,
809 F2FS_BLKSIZE - chksum_ofs);
810 }
811 return chksum;
812}
813
814static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
815 struct f2fs_checkpoint **cp_block, struct page **cp_page,
816 unsigned long long *version)
817{
818 size_t crc_offset = 0;
819 __u32 crc;
820
821 *cp_page = f2fs_get_meta_page(sbi, cp_addr);
822 if (IS_ERR(*cp_page))
823 return PTR_ERR(*cp_page);
824
825 *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
826
827 crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
828 if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
829 crc_offset > CP_CHKSUM_OFFSET) {
830 f2fs_put_page(*cp_page, 1);
831 f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
832 return -EINVAL;
833 }
834
835 crc = f2fs_checkpoint_chksum(sbi, *cp_block);
836 if (crc != cur_cp_crc(*cp_block)) {
837 f2fs_put_page(*cp_page, 1);
838 f2fs_warn(sbi, "invalid crc value");
839 return -EINVAL;
840 }
841
842 *version = cur_cp_version(*cp_block);
843 return 0;
844}
845
846static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
847 block_t cp_addr, unsigned long long *version)
848{
849 struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
850 struct f2fs_checkpoint *cp_block = NULL;
851 unsigned long long cur_version = 0, pre_version = 0;
852 int err;
853
854 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
855 &cp_page_1, version);
856 if (err)
857 return NULL;
858
859 if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
860 sbi->blocks_per_seg) {
861 f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
862 le32_to_cpu(cp_block->cp_pack_total_block_count));
863 goto invalid_cp;
864 }
865 pre_version = *version;
866
867 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
868 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
869 &cp_page_2, version);
870 if (err)
871 goto invalid_cp;
872 cur_version = *version;
873
874 if (cur_version == pre_version) {
875 *version = cur_version;
876 f2fs_put_page(cp_page_2, 1);
877 return cp_page_1;
878 }
879 f2fs_put_page(cp_page_2, 1);
880invalid_cp:
881 f2fs_put_page(cp_page_1, 1);
882 return NULL;
883}
884
885int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
886{
887 struct f2fs_checkpoint *cp_block;
888 struct f2fs_super_block *fsb = sbi->raw_super;
889 struct page *cp1, *cp2, *cur_page;
890 unsigned long blk_size = sbi->blocksize;
891 unsigned long long cp1_version = 0, cp2_version = 0;
892 unsigned long long cp_start_blk_no;
893 unsigned int cp_blks = 1 + __cp_payload(sbi);
894 block_t cp_blk_no;
895 int i;
896 int err;
897
898 sbi->ckpt = f2fs_kvzalloc(sbi, array_size(blk_size, cp_blks),
899 GFP_KERNEL);
900 if (!sbi->ckpt)
901 return -ENOMEM;
902 /*
903 * Finding out valid cp block involves read both
904 * sets( cp pack 1 and cp pack 2)
905 */
906 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
907 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
908
909 /* The second checkpoint pack should start at the next segment */
910 cp_start_blk_no += ((unsigned long long)1) <<
911 le32_to_cpu(fsb->log_blocks_per_seg);
912 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
913
914 if (cp1 && cp2) {
915 if (ver_after(cp2_version, cp1_version))
916 cur_page = cp2;
917 else
918 cur_page = cp1;
919 } else if (cp1) {
920 cur_page = cp1;
921 } else if (cp2) {
922 cur_page = cp2;
923 } else {
924 err = -EFSCORRUPTED;
925 goto fail_no_cp;
926 }
927
928 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
929 memcpy(sbi->ckpt, cp_block, blk_size);
930
931 if (cur_page == cp1)
932 sbi->cur_cp_pack = 1;
933 else
934 sbi->cur_cp_pack = 2;
935
936 /* Sanity checking of checkpoint */
937 if (f2fs_sanity_check_ckpt(sbi)) {
938 err = -EFSCORRUPTED;
939 goto free_fail_no_cp;
940 }
941
942 if (cp_blks <= 1)
943 goto done;
944
945 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
946 if (cur_page == cp2)
947 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
948
949 for (i = 1; i < cp_blks; i++) {
950 void *sit_bitmap_ptr;
951 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
952
953 cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
954 if (IS_ERR(cur_page)) {
955 err = PTR_ERR(cur_page);
956 goto free_fail_no_cp;
957 }
958 sit_bitmap_ptr = page_address(cur_page);
959 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
960 f2fs_put_page(cur_page, 1);
961 }
962done:
963 f2fs_put_page(cp1, 1);
964 f2fs_put_page(cp2, 1);
965 return 0;
966
967free_fail_no_cp:
968 f2fs_put_page(cp1, 1);
969 f2fs_put_page(cp2, 1);
970fail_no_cp:
971 kvfree(sbi->ckpt);
972 return err;
973}
974
975static void __add_dirty_inode(struct inode *inode, enum inode_type type)
976{
977 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
978 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
979
980 if (is_inode_flag_set(inode, flag))
981 return;
982
983 set_inode_flag(inode, flag);
984 if (!f2fs_is_volatile_file(inode))
985 list_add_tail(&F2FS_I(inode)->dirty_list,
986 &sbi->inode_list[type]);
987 stat_inc_dirty_inode(sbi, type);
988}
989
990static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
991{
992 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
993
994 if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
995 return;
996
997 list_del_init(&F2FS_I(inode)->dirty_list);
998 clear_inode_flag(inode, flag);
999 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
1000}
1001
1002void f2fs_update_dirty_page(struct inode *inode, struct page *page)
1003{
1004 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1005 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1006
1007 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1008 !S_ISLNK(inode->i_mode))
1009 return;
1010
1011 spin_lock(&sbi->inode_lock[type]);
1012 if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
1013 __add_dirty_inode(inode, type);
1014 inode_inc_dirty_pages(inode);
1015 spin_unlock(&sbi->inode_lock[type]);
1016
1017 f2fs_set_page_private(page, 0);
1018 f2fs_trace_pid(page);
1019}
1020
1021void f2fs_remove_dirty_inode(struct inode *inode)
1022{
1023 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1024 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1025
1026 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1027 !S_ISLNK(inode->i_mode))
1028 return;
1029
1030 if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
1031 return;
1032
1033 spin_lock(&sbi->inode_lock[type]);
1034 __remove_dirty_inode(inode, type);
1035 spin_unlock(&sbi->inode_lock[type]);
1036}
1037
1038int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
1039{
1040 struct list_head *head;
1041 struct inode *inode;
1042 struct f2fs_inode_info *fi;
1043 bool is_dir = (type == DIR_INODE);
1044 unsigned long ino = 0;
1045
1046 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
1047 get_pages(sbi, is_dir ?
1048 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1049retry:
1050 if (unlikely(f2fs_cp_error(sbi)))
1051 return -EIO;
1052
1053 spin_lock(&sbi->inode_lock[type]);
1054
1055 head = &sbi->inode_list[type];
1056 if (list_empty(head)) {
1057 spin_unlock(&sbi->inode_lock[type]);
1058 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
1059 get_pages(sbi, is_dir ?
1060 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1061 return 0;
1062 }
1063 fi = list_first_entry(head, struct f2fs_inode_info, dirty_list);
1064 inode = igrab(&fi->vfs_inode);
1065 spin_unlock(&sbi->inode_lock[type]);
1066 if (inode) {
1067 unsigned long cur_ino = inode->i_ino;
1068
1069 F2FS_I(inode)->cp_task = current;
1070
1071 filemap_fdatawrite(inode->i_mapping);
1072
1073 F2FS_I(inode)->cp_task = NULL;
1074
1075 iput(inode);
1076 /* We need to give cpu to another writers. */
1077 if (ino == cur_ino)
1078 cond_resched();
1079 else
1080 ino = cur_ino;
1081 } else {
1082 /*
1083 * We should submit bio, since it exists several
1084 * wribacking dentry pages in the freeing inode.
1085 */
1086 f2fs_submit_merged_write(sbi, DATA);
1087 cond_resched();
1088 }
1089 goto retry;
1090}
1091
1092int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
1093{
1094 struct list_head *head = &sbi->inode_list[DIRTY_META];
1095 struct inode *inode;
1096 struct f2fs_inode_info *fi;
1097 s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
1098
1099 while (total--) {
1100 if (unlikely(f2fs_cp_error(sbi)))
1101 return -EIO;
1102
1103 spin_lock(&sbi->inode_lock[DIRTY_META]);
1104 if (list_empty(head)) {
1105 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1106 return 0;
1107 }
1108 fi = list_first_entry(head, struct f2fs_inode_info,
1109 gdirty_list);
1110 inode = igrab(&fi->vfs_inode);
1111 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1112 if (inode) {
1113 sync_inode_metadata(inode, 0);
1114
1115 /* it's on eviction */
1116 if (is_inode_flag_set(inode, FI_DIRTY_INODE))
1117 f2fs_update_inode_page(inode);
1118 iput(inode);
1119 }
1120 }
1121 return 0;
1122}
1123
1124static void __prepare_cp_block(struct f2fs_sb_info *sbi)
1125{
1126 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1127 struct f2fs_nm_info *nm_i = NM_I(sbi);
1128 nid_t last_nid = nm_i->next_scan_nid;
1129
1130 next_free_nid(sbi, &last_nid);
1131 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
1132 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
1133 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
1134 ckpt->next_free_nid = cpu_to_le32(last_nid);
1135}
1136
1137static bool __need_flush_quota(struct f2fs_sb_info *sbi)
1138{
1139 bool ret = false;
1140
1141 if (!is_journalled_quota(sbi))
1142 return false;
1143
1144 down_write(&sbi->quota_sem);
1145 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
1146 ret = false;
1147 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
1148 ret = false;
1149 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
1150 clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1151 ret = true;
1152 } else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
1153 ret = true;
1154 }
1155 up_write(&sbi->quota_sem);
1156 return ret;
1157}
1158
1159/*
1160 * Freeze all the FS-operations for checkpoint.
1161 */
1162static int block_operations(struct f2fs_sb_info *sbi)
1163{
1164 struct writeback_control wbc = {
1165 .sync_mode = WB_SYNC_ALL,
1166 .nr_to_write = LONG_MAX,
1167 .for_reclaim = 0,
1168 };
1169 int err = 0, cnt = 0;
1170
1171 /*
1172 * Let's flush inline_data in dirty node pages.
1173 */
1174 f2fs_flush_inline_data(sbi);
1175
1176retry_flush_quotas:
1177 f2fs_lock_all(sbi);
1178 if (__need_flush_quota(sbi)) {
1179 int locked;
1180
1181 if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
1182 set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1183 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1184 goto retry_flush_dents;
1185 }
1186 f2fs_unlock_all(sbi);
1187
1188 /* only failed during mount/umount/freeze/quotactl */
1189 locked = down_read_trylock(&sbi->sb->s_umount);
1190 f2fs_quota_sync(sbi->sb, -1);
1191 if (locked)
1192 up_read(&sbi->sb->s_umount);
1193 cond_resched();
1194 goto retry_flush_quotas;
1195 }
1196
1197retry_flush_dents:
1198 /* write all the dirty dentry pages */
1199 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
1200 f2fs_unlock_all(sbi);
1201 err = f2fs_sync_dirty_inodes(sbi, DIR_INODE);
1202 if (err)
1203 return err;
1204 cond_resched();
1205 goto retry_flush_quotas;
1206 }
1207
1208 /*
1209 * POR: we should ensure that there are no dirty node pages
1210 * until finishing nat/sit flush. inode->i_blocks can be updated.
1211 */
1212 down_write(&sbi->node_change);
1213
1214 if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
1215 up_write(&sbi->node_change);
1216 f2fs_unlock_all(sbi);
1217 err = f2fs_sync_inode_meta(sbi);
1218 if (err)
1219 return err;
1220 cond_resched();
1221 goto retry_flush_quotas;
1222 }
1223
1224retry_flush_nodes:
1225 down_write(&sbi->node_write);
1226
1227 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
1228 up_write(&sbi->node_write);
1229 atomic_inc(&sbi->wb_sync_req[NODE]);
1230 err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO);
1231 atomic_dec(&sbi->wb_sync_req[NODE]);
1232 if (err) {
1233 up_write(&sbi->node_change);
1234 f2fs_unlock_all(sbi);
1235 return err;
1236 }
1237 cond_resched();
1238 goto retry_flush_nodes;
1239 }
1240
1241 /*
1242 * sbi->node_change is used only for AIO write_begin path which produces
1243 * dirty node blocks and some checkpoint values by block allocation.
1244 */
1245 __prepare_cp_block(sbi);
1246 up_write(&sbi->node_change);
1247 return err;
1248}
1249
1250static void unblock_operations(struct f2fs_sb_info *sbi)
1251{
1252 up_write(&sbi->node_write);
1253 f2fs_unlock_all(sbi);
1254}
1255
1256void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type)
1257{
1258 DEFINE_WAIT(wait);
1259
1260 for (;;) {
1261 if (!get_pages(sbi, type))
1262 break;
1263
1264 if (unlikely(f2fs_cp_error(sbi)))
1265 break;
1266
1267 if (type == F2FS_DIRTY_META)
1268 f2fs_sync_meta_pages(sbi, META, LONG_MAX,
1269 FS_CP_META_IO);
1270 else if (type == F2FS_WB_CP_DATA)
1271 f2fs_submit_merged_write(sbi, DATA);
1272
1273 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
1274 io_schedule_timeout(DEFAULT_IO_TIMEOUT);
1275 }
1276 finish_wait(&sbi->cp_wait, &wait);
1277}
1278
1279static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1280{
1281 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1282 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1283 unsigned long flags;
1284
1285 spin_lock_irqsave(&sbi->cp_lock, flags);
1286
1287 if ((cpc->reason & CP_UMOUNT) &&
1288 le32_to_cpu(ckpt->cp_pack_total_block_count) >
1289 sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
1290 disable_nat_bits(sbi, false);
1291
1292 if (cpc->reason & CP_TRIMMED)
1293 __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1294 else
1295 __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1296
1297 if (cpc->reason & CP_UMOUNT)
1298 __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1299 else
1300 __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1301
1302 if (cpc->reason & CP_FASTBOOT)
1303 __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1304 else
1305 __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1306
1307 if (orphan_num)
1308 __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1309 else
1310 __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1311
1312 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1313 __set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1314
1315 if (is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
1316 __set_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
1317 else
1318 __clear_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
1319
1320 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
1321 __set_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1322 else
1323 __clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1324
1325 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
1326 __set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1327 else
1328 __clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1329
1330 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
1331 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1332 else
1333 __clear_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1334
1335 if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
1336 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1337
1338 /* set this flag to activate crc|cp_ver for recovery */
1339 __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
1340 __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
1341
1342 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1343}
1344
1345static void commit_checkpoint(struct f2fs_sb_info *sbi,
1346 void *src, block_t blk_addr)
1347{
1348 struct writeback_control wbc = {
1349 .for_reclaim = 0,
1350 };
1351
1352 /*
1353 * pagevec_lookup_tag and lock_page again will take
1354 * some extra time. Therefore, f2fs_update_meta_pages and
1355 * f2fs_sync_meta_pages are combined in this function.
1356 */
1357 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
1358 int err;
1359
1360 f2fs_wait_on_page_writeback(page, META, true, true);
1361
1362 memcpy(page_address(page), src, PAGE_SIZE);
1363
1364 set_page_dirty(page);
1365 if (unlikely(!clear_page_dirty_for_io(page)))
1366 f2fs_bug_on(sbi, 1);
1367
1368 /* writeout cp pack 2 page */
1369 err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO);
1370 if (unlikely(err && f2fs_cp_error(sbi))) {
1371 f2fs_put_page(page, 1);
1372 return;
1373 }
1374
1375 f2fs_bug_on(sbi, err);
1376 f2fs_put_page(page, 0);
1377
1378 /* submit checkpoint (with barrier if NOBARRIER is not set) */
1379 f2fs_submit_merged_write(sbi, META_FLUSH);
1380}
1381
1382static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1383{
1384 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1385 struct f2fs_nm_info *nm_i = NM_I(sbi);
1386 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags;
1387 block_t start_blk;
1388 unsigned int data_sum_blocks, orphan_blocks;
1389 __u32 crc32 = 0;
1390 int i;
1391 int cp_payload_blks = __cp_payload(sbi);
1392 struct super_block *sb = sbi->sb;
1393 struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1394 u64 kbytes_written;
1395 int err;
1396
1397 /* Flush all the NAT/SIT pages */
1398 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1399
1400 /* start to update checkpoint, cp ver is already updated previously */
1401 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
1402 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
1403 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1404 ckpt->cur_node_segno[i] =
1405 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
1406 ckpt->cur_node_blkoff[i] =
1407 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
1408 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
1409 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
1410 }
1411 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1412 ckpt->cur_data_segno[i] =
1413 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
1414 ckpt->cur_data_blkoff[i] =
1415 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
1416 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
1417 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
1418 }
1419
1420 /* 2 cp + n data seg summary + orphan inode blocks */
1421 data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false);
1422 spin_lock_irqsave(&sbi->cp_lock, flags);
1423 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
1424 __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1425 else
1426 __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1427 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1428
1429 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
1430 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
1431 orphan_blocks);
1432
1433 if (__remain_node_summaries(cpc->reason))
1434 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
1435 cp_payload_blks + data_sum_blocks +
1436 orphan_blocks + NR_CURSEG_NODE_TYPE);
1437 else
1438 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1439 cp_payload_blks + data_sum_blocks +
1440 orphan_blocks);
1441
1442 /* update ckpt flag for checkpoint */
1443 update_ckpt_flags(sbi, cpc);
1444
1445 /* update SIT/NAT bitmap */
1446 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1447 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1448
1449 crc32 = f2fs_checkpoint_chksum(sbi, ckpt);
1450 *((__le32 *)((unsigned char *)ckpt +
1451 le32_to_cpu(ckpt->checksum_offset)))
1452 = cpu_to_le32(crc32);
1453
1454 start_blk = __start_cp_next_addr(sbi);
1455
1456 /* write nat bits */
1457 if (enabled_nat_bits(sbi, cpc)) {
1458 __u64 cp_ver = cur_cp_version(ckpt);
1459 block_t blk;
1460
1461 cp_ver |= ((__u64)crc32 << 32);
1462 *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver);
1463
1464 blk = start_blk + sbi->blocks_per_seg - nm_i->nat_bits_blocks;
1465 for (i = 0; i < nm_i->nat_bits_blocks; i++)
1466 f2fs_update_meta_page(sbi, nm_i->nat_bits +
1467 (i << F2FS_BLKSIZE_BITS), blk + i);
1468 }
1469
1470 /* write out checkpoint buffer at block 0 */
1471 f2fs_update_meta_page(sbi, ckpt, start_blk++);
1472
1473 for (i = 1; i < 1 + cp_payload_blks; i++)
1474 f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1475 start_blk++);
1476
1477 if (orphan_num) {
1478 write_orphan_inodes(sbi, start_blk);
1479 start_blk += orphan_blocks;
1480 }
1481
1482 f2fs_write_data_summaries(sbi, start_blk);
1483 start_blk += data_sum_blocks;
1484
1485 /* Record write statistics in the hot node summary */
1486 kbytes_written = sbi->kbytes_written;
1487 if (sb->s_bdev->bd_part)
1488 kbytes_written += BD_PART_WRITTEN(sbi);
1489
1490 seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1491
1492 if (__remain_node_summaries(cpc->reason)) {
1493 f2fs_write_node_summaries(sbi, start_blk);
1494 start_blk += NR_CURSEG_NODE_TYPE;
1495 }
1496
1497 /* update user_block_counts */
1498 sbi->last_valid_block_count = sbi->total_valid_block_count;
1499 percpu_counter_set(&sbi->alloc_valid_block_count, 0);
1500
1501 /* Here, we have one bio having CP pack except cp pack 2 page */
1502 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1503 /* Wait for all dirty meta pages to be submitted for IO */
1504 f2fs_wait_on_all_pages(sbi, F2FS_DIRTY_META);
1505
1506 /* wait for previous submitted meta pages writeback */
1507 f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1508
1509 /* flush all device cache */
1510 err = f2fs_flush_device_cache(sbi);
1511 if (err)
1512 return err;
1513
1514 /* barrier and flush checkpoint cp pack 2 page if it can */
1515 commit_checkpoint(sbi, ckpt, start_blk);
1516 f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1517
1518 /*
1519 * invalidate intermediate page cache borrowed from meta inode which are
1520 * used for migration of encrypted, verity or compressed inode's blocks.
1521 */
1522 if (f2fs_sb_has_encrypt(sbi) || f2fs_sb_has_verity(sbi) ||
1523 f2fs_sb_has_compression(sbi))
1524 invalidate_mapping_pages(META_MAPPING(sbi),
1525 MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1);
1526
1527 f2fs_release_ino_entry(sbi, false);
1528
1529 f2fs_reset_fsync_node_info(sbi);
1530
1531 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1532 clear_sbi_flag(sbi, SBI_NEED_CP);
1533 clear_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1534
1535 spin_lock(&sbi->stat_lock);
1536 sbi->unusable_block_count = 0;
1537 spin_unlock(&sbi->stat_lock);
1538
1539 __set_cp_next_pack(sbi);
1540
1541 /*
1542 * redirty superblock if metadata like node page or inode cache is
1543 * updated during writing checkpoint.
1544 */
1545 if (get_pages(sbi, F2FS_DIRTY_NODES) ||
1546 get_pages(sbi, F2FS_DIRTY_IMETA))
1547 set_sbi_flag(sbi, SBI_IS_DIRTY);
1548
1549 f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
1550
1551 return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
1552}
1553
1554int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1555{
1556 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1557 unsigned long long ckpt_ver;
1558 int err = 0;
1559
1560 if (f2fs_readonly(sbi->sb) || f2fs_hw_is_readonly(sbi))
1561 return -EROFS;
1562
1563 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1564 if (cpc->reason != CP_PAUSE)
1565 return 0;
1566 f2fs_warn(sbi, "Start checkpoint disabled!");
1567 }
1568 if (cpc->reason != CP_RESIZE)
1569 mutex_lock(&sbi->cp_mutex);
1570
1571 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1572 ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
1573 ((cpc->reason & CP_DISCARD) && !sbi->discard_blks)))
1574 goto out;
1575 if (unlikely(f2fs_cp_error(sbi))) {
1576 err = -EIO;
1577 goto out;
1578 }
1579
1580 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1581
1582 err = block_operations(sbi);
1583 if (err)
1584 goto out;
1585
1586 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1587
1588 f2fs_flush_merged_writes(sbi);
1589
1590 /* this is the case of multiple fstrims without any changes */
1591 if (cpc->reason & CP_DISCARD) {
1592 if (!f2fs_exist_trim_candidates(sbi, cpc)) {
1593 unblock_operations(sbi);
1594 goto out;
1595 }
1596
1597 if (NM_I(sbi)->dirty_nat_cnt == 0 &&
1598 SIT_I(sbi)->dirty_sentries == 0 &&
1599 prefree_segments(sbi) == 0) {
1600 f2fs_flush_sit_entries(sbi, cpc);
1601 f2fs_clear_prefree_segments(sbi, cpc);
1602 unblock_operations(sbi);
1603 goto out;
1604 }
1605 }
1606
1607 /*
1608 * update checkpoint pack index
1609 * Increase the version number so that
1610 * SIT entries and seg summaries are written at correct place
1611 */
1612 ckpt_ver = cur_cp_version(ckpt);
1613 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1614
1615 /* write cached NAT/SIT entries to NAT/SIT area */
1616 err = f2fs_flush_nat_entries(sbi, cpc);
1617 if (err)
1618 goto stop;
1619
1620 f2fs_flush_sit_entries(sbi, cpc);
1621
1622 err = do_checkpoint(sbi, cpc);
1623 if (err)
1624 f2fs_release_discard_addrs(sbi);
1625 else
1626 f2fs_clear_prefree_segments(sbi, cpc);
1627stop:
1628 unblock_operations(sbi);
1629 stat_inc_cp_count(sbi->stat_info);
1630
1631 if (cpc->reason & CP_RECOVERY)
1632 f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
1633
1634 /* update CP_TIME to trigger checkpoint periodically */
1635 f2fs_update_time(sbi, CP_TIME);
1636 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1637out:
1638 if (cpc->reason != CP_RESIZE)
1639 mutex_unlock(&sbi->cp_mutex);
1640 return err;
1641}
1642
1643void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi)
1644{
1645 int i;
1646
1647 for (i = 0; i < MAX_INO_ENTRY; i++) {
1648 struct inode_management *im = &sbi->im[i];
1649
1650 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1651 spin_lock_init(&im->ino_lock);
1652 INIT_LIST_HEAD(&im->ino_list);
1653 im->ino_num = 0;
1654 }
1655
1656 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1657 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1658 F2FS_ORPHANS_PER_BLOCK;
1659}
1660
1661int __init f2fs_create_checkpoint_caches(void)
1662{
1663 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1664 sizeof(struct ino_entry));
1665 if (!ino_entry_slab)
1666 return -ENOMEM;
1667 f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1668 sizeof(struct inode_entry));
1669 if (!f2fs_inode_entry_slab) {
1670 kmem_cache_destroy(ino_entry_slab);
1671 return -ENOMEM;
1672 }
1673 return 0;
1674}
1675
1676void f2fs_destroy_checkpoint_caches(void)
1677{
1678 kmem_cache_destroy(ino_entry_slab);
1679 kmem_cache_destroy(f2fs_inode_entry_slab);
1680}