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1/*
2 * fs/f2fs/checkpoint.c
3 *
4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 as
9 * published by the Free Software Foundation.
10 */
11#include <linux/fs.h>
12#include <linux/bio.h>
13#include <linux/mpage.h>
14#include <linux/writeback.h>
15#include <linux/blkdev.h>
16#include <linux/f2fs_fs.h>
17#include <linux/pagevec.h>
18#include <linux/swap.h>
19
20#include "f2fs.h"
21#include "node.h"
22#include "segment.h"
23#include "trace.h"
24#include <trace/events/f2fs.h>
25
26static struct kmem_cache *ino_entry_slab;
27struct kmem_cache *inode_entry_slab;
28
29/*
30 * We guarantee no failure on the returned page.
31 */
32struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
33{
34 struct address_space *mapping = META_MAPPING(sbi);
35 struct page *page = NULL;
36repeat:
37 page = grab_cache_page(mapping, index);
38 if (!page) {
39 cond_resched();
40 goto repeat;
41 }
42 f2fs_wait_on_page_writeback(page, META, true);
43 SetPageUptodate(page);
44 return page;
45}
46
47/*
48 * We guarantee no failure on the returned page.
49 */
50static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
51 bool is_meta)
52{
53 struct address_space *mapping = META_MAPPING(sbi);
54 struct page *page;
55 struct f2fs_io_info fio = {
56 .sbi = sbi,
57 .type = META,
58 .rw = READ_SYNC | REQ_META | REQ_PRIO,
59 .old_blkaddr = index,
60 .new_blkaddr = index,
61 .encrypted_page = NULL,
62 };
63
64 if (unlikely(!is_meta))
65 fio.rw &= ~REQ_META;
66repeat:
67 page = grab_cache_page(mapping, index);
68 if (!page) {
69 cond_resched();
70 goto repeat;
71 }
72 if (PageUptodate(page))
73 goto out;
74
75 fio.page = page;
76
77 if (f2fs_submit_page_bio(&fio)) {
78 f2fs_put_page(page, 1);
79 goto repeat;
80 }
81
82 lock_page(page);
83 if (unlikely(page->mapping != mapping)) {
84 f2fs_put_page(page, 1);
85 goto repeat;
86 }
87
88 /*
89 * if there is any IO error when accessing device, make our filesystem
90 * readonly and make sure do not write checkpoint with non-uptodate
91 * meta page.
92 */
93 if (unlikely(!PageUptodate(page)))
94 f2fs_stop_checkpoint(sbi);
95out:
96 return page;
97}
98
99struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
100{
101 return __get_meta_page(sbi, index, true);
102}
103
104/* for POR only */
105struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
106{
107 return __get_meta_page(sbi, index, false);
108}
109
110bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
111{
112 switch (type) {
113 case META_NAT:
114 break;
115 case META_SIT:
116 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
117 return false;
118 break;
119 case META_SSA:
120 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
121 blkaddr < SM_I(sbi)->ssa_blkaddr))
122 return false;
123 break;
124 case META_CP:
125 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
126 blkaddr < __start_cp_addr(sbi)))
127 return false;
128 break;
129 case META_POR:
130 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
131 blkaddr < MAIN_BLKADDR(sbi)))
132 return false;
133 break;
134 default:
135 BUG();
136 }
137
138 return true;
139}
140
141/*
142 * Readahead CP/NAT/SIT/SSA pages
143 */
144int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
145 int type, bool sync)
146{
147 struct page *page;
148 block_t blkno = start;
149 struct f2fs_io_info fio = {
150 .sbi = sbi,
151 .type = META,
152 .rw = sync ? (READ_SYNC | REQ_META | REQ_PRIO) : READA,
153 .encrypted_page = NULL,
154 };
155 struct blk_plug plug;
156
157 if (unlikely(type == META_POR))
158 fio.rw &= ~REQ_META;
159
160 blk_start_plug(&plug);
161 for (; nrpages-- > 0; blkno++) {
162
163 if (!is_valid_blkaddr(sbi, blkno, type))
164 goto out;
165
166 switch (type) {
167 case META_NAT:
168 if (unlikely(blkno >=
169 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
170 blkno = 0;
171 /* get nat block addr */
172 fio.new_blkaddr = current_nat_addr(sbi,
173 blkno * NAT_ENTRY_PER_BLOCK);
174 break;
175 case META_SIT:
176 /* get sit block addr */
177 fio.new_blkaddr = current_sit_addr(sbi,
178 blkno * SIT_ENTRY_PER_BLOCK);
179 break;
180 case META_SSA:
181 case META_CP:
182 case META_POR:
183 fio.new_blkaddr = blkno;
184 break;
185 default:
186 BUG();
187 }
188
189 page = grab_cache_page(META_MAPPING(sbi), fio.new_blkaddr);
190 if (!page)
191 continue;
192 if (PageUptodate(page)) {
193 f2fs_put_page(page, 1);
194 continue;
195 }
196
197 fio.page = page;
198 fio.old_blkaddr = fio.new_blkaddr;
199 f2fs_submit_page_mbio(&fio);
200 f2fs_put_page(page, 0);
201 }
202out:
203 f2fs_submit_merged_bio(sbi, META, READ);
204 blk_finish_plug(&plug);
205 return blkno - start;
206}
207
208void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
209{
210 struct page *page;
211 bool readahead = false;
212
213 page = find_get_page(META_MAPPING(sbi), index);
214 if (!page || (page && !PageUptodate(page)))
215 readahead = true;
216 f2fs_put_page(page, 0);
217
218 if (readahead)
219 ra_meta_pages(sbi, index, MAX_BIO_BLOCKS(sbi), META_POR, true);
220}
221
222static int f2fs_write_meta_page(struct page *page,
223 struct writeback_control *wbc)
224{
225 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
226
227 trace_f2fs_writepage(page, META);
228
229 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
230 goto redirty_out;
231 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
232 goto redirty_out;
233 if (unlikely(f2fs_cp_error(sbi)))
234 goto redirty_out;
235
236 write_meta_page(sbi, page);
237 dec_page_count(sbi, F2FS_DIRTY_META);
238
239 if (wbc->for_reclaim)
240 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, META, WRITE);
241
242 unlock_page(page);
243
244 if (unlikely(f2fs_cp_error(sbi)))
245 f2fs_submit_merged_bio(sbi, META, WRITE);
246
247 return 0;
248
249redirty_out:
250 redirty_page_for_writepage(wbc, page);
251 return AOP_WRITEPAGE_ACTIVATE;
252}
253
254static int f2fs_write_meta_pages(struct address_space *mapping,
255 struct writeback_control *wbc)
256{
257 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
258 long diff, written;
259
260 /* collect a number of dirty meta pages and write together */
261 if (wbc->for_kupdate ||
262 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
263 goto skip_write;
264
265 trace_f2fs_writepages(mapping->host, wbc, META);
266
267 /* if mounting is failed, skip writing node pages */
268 mutex_lock(&sbi->cp_mutex);
269 diff = nr_pages_to_write(sbi, META, wbc);
270 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
271 mutex_unlock(&sbi->cp_mutex);
272 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
273 return 0;
274
275skip_write:
276 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
277 trace_f2fs_writepages(mapping->host, wbc, META);
278 return 0;
279}
280
281long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
282 long nr_to_write)
283{
284 struct address_space *mapping = META_MAPPING(sbi);
285 pgoff_t index = 0, end = ULONG_MAX, prev = ULONG_MAX;
286 struct pagevec pvec;
287 long nwritten = 0;
288 struct writeback_control wbc = {
289 .for_reclaim = 0,
290 };
291 struct blk_plug plug;
292
293 pagevec_init(&pvec, 0);
294
295 blk_start_plug(&plug);
296
297 while (index <= end) {
298 int i, nr_pages;
299 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
300 PAGECACHE_TAG_DIRTY,
301 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
302 if (unlikely(nr_pages == 0))
303 break;
304
305 for (i = 0; i < nr_pages; i++) {
306 struct page *page = pvec.pages[i];
307
308 if (prev == ULONG_MAX)
309 prev = page->index - 1;
310 if (nr_to_write != LONG_MAX && page->index != prev + 1) {
311 pagevec_release(&pvec);
312 goto stop;
313 }
314
315 lock_page(page);
316
317 if (unlikely(page->mapping != mapping)) {
318continue_unlock:
319 unlock_page(page);
320 continue;
321 }
322 if (!PageDirty(page)) {
323 /* someone wrote it for us */
324 goto continue_unlock;
325 }
326
327 f2fs_wait_on_page_writeback(page, META, true);
328
329 BUG_ON(PageWriteback(page));
330 if (!clear_page_dirty_for_io(page))
331 goto continue_unlock;
332
333 if (mapping->a_ops->writepage(page, &wbc)) {
334 unlock_page(page);
335 break;
336 }
337 nwritten++;
338 prev = page->index;
339 if (unlikely(nwritten >= nr_to_write))
340 break;
341 }
342 pagevec_release(&pvec);
343 cond_resched();
344 }
345stop:
346 if (nwritten)
347 f2fs_submit_merged_bio(sbi, type, WRITE);
348
349 blk_finish_plug(&plug);
350
351 return nwritten;
352}
353
354static int f2fs_set_meta_page_dirty(struct page *page)
355{
356 trace_f2fs_set_page_dirty(page, META);
357
358 SetPageUptodate(page);
359 if (!PageDirty(page)) {
360 __set_page_dirty_nobuffers(page);
361 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
362 SetPagePrivate(page);
363 f2fs_trace_pid(page);
364 return 1;
365 }
366 return 0;
367}
368
369const struct address_space_operations f2fs_meta_aops = {
370 .writepage = f2fs_write_meta_page,
371 .writepages = f2fs_write_meta_pages,
372 .set_page_dirty = f2fs_set_meta_page_dirty,
373 .invalidatepage = f2fs_invalidate_page,
374 .releasepage = f2fs_release_page,
375};
376
377static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
378{
379 struct inode_management *im = &sbi->im[type];
380 struct ino_entry *e, *tmp;
381
382 tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
383retry:
384 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
385
386 spin_lock(&im->ino_lock);
387 e = radix_tree_lookup(&im->ino_root, ino);
388 if (!e) {
389 e = tmp;
390 if (radix_tree_insert(&im->ino_root, ino, e)) {
391 spin_unlock(&im->ino_lock);
392 radix_tree_preload_end();
393 goto retry;
394 }
395 memset(e, 0, sizeof(struct ino_entry));
396 e->ino = ino;
397
398 list_add_tail(&e->list, &im->ino_list);
399 if (type != ORPHAN_INO)
400 im->ino_num++;
401 }
402 spin_unlock(&im->ino_lock);
403 radix_tree_preload_end();
404
405 if (e != tmp)
406 kmem_cache_free(ino_entry_slab, tmp);
407}
408
409static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
410{
411 struct inode_management *im = &sbi->im[type];
412 struct ino_entry *e;
413
414 spin_lock(&im->ino_lock);
415 e = radix_tree_lookup(&im->ino_root, ino);
416 if (e) {
417 list_del(&e->list);
418 radix_tree_delete(&im->ino_root, ino);
419 im->ino_num--;
420 spin_unlock(&im->ino_lock);
421 kmem_cache_free(ino_entry_slab, e);
422 return;
423 }
424 spin_unlock(&im->ino_lock);
425}
426
427void add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
428{
429 /* add new dirty ino entry into list */
430 __add_ino_entry(sbi, ino, type);
431}
432
433void remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
434{
435 /* remove dirty ino entry from list */
436 __remove_ino_entry(sbi, ino, type);
437}
438
439/* mode should be APPEND_INO or UPDATE_INO */
440bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
441{
442 struct inode_management *im = &sbi->im[mode];
443 struct ino_entry *e;
444
445 spin_lock(&im->ino_lock);
446 e = radix_tree_lookup(&im->ino_root, ino);
447 spin_unlock(&im->ino_lock);
448 return e ? true : false;
449}
450
451void release_ino_entry(struct f2fs_sb_info *sbi)
452{
453 struct ino_entry *e, *tmp;
454 int i;
455
456 for (i = APPEND_INO; i <= UPDATE_INO; i++) {
457 struct inode_management *im = &sbi->im[i];
458
459 spin_lock(&im->ino_lock);
460 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
461 list_del(&e->list);
462 radix_tree_delete(&im->ino_root, e->ino);
463 kmem_cache_free(ino_entry_slab, e);
464 im->ino_num--;
465 }
466 spin_unlock(&im->ino_lock);
467 }
468}
469
470int acquire_orphan_inode(struct f2fs_sb_info *sbi)
471{
472 struct inode_management *im = &sbi->im[ORPHAN_INO];
473 int err = 0;
474
475 spin_lock(&im->ino_lock);
476 if (unlikely(im->ino_num >= sbi->max_orphans))
477 err = -ENOSPC;
478 else
479 im->ino_num++;
480 spin_unlock(&im->ino_lock);
481
482 return err;
483}
484
485void release_orphan_inode(struct f2fs_sb_info *sbi)
486{
487 struct inode_management *im = &sbi->im[ORPHAN_INO];
488
489 spin_lock(&im->ino_lock);
490 f2fs_bug_on(sbi, im->ino_num == 0);
491 im->ino_num--;
492 spin_unlock(&im->ino_lock);
493}
494
495void add_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
496{
497 /* add new orphan ino entry into list */
498 __add_ino_entry(sbi, ino, ORPHAN_INO);
499}
500
501void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
502{
503 /* remove orphan entry from orphan list */
504 __remove_ino_entry(sbi, ino, ORPHAN_INO);
505}
506
507static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
508{
509 struct inode *inode;
510
511 inode = f2fs_iget(sbi->sb, ino);
512 if (IS_ERR(inode)) {
513 /*
514 * there should be a bug that we can't find the entry
515 * to orphan inode.
516 */
517 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
518 return PTR_ERR(inode);
519 }
520
521 clear_nlink(inode);
522
523 /* truncate all the data during iput */
524 iput(inode);
525 return 0;
526}
527
528int recover_orphan_inodes(struct f2fs_sb_info *sbi)
529{
530 block_t start_blk, orphan_blocks, i, j;
531 int err;
532
533 if (!is_set_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG))
534 return 0;
535
536 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
537 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
538
539 ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
540
541 for (i = 0; i < orphan_blocks; i++) {
542 struct page *page = get_meta_page(sbi, start_blk + i);
543 struct f2fs_orphan_block *orphan_blk;
544
545 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
546 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
547 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
548 err = recover_orphan_inode(sbi, ino);
549 if (err) {
550 f2fs_put_page(page, 1);
551 return err;
552 }
553 }
554 f2fs_put_page(page, 1);
555 }
556 /* clear Orphan Flag */
557 clear_ckpt_flags(F2FS_CKPT(sbi), CP_ORPHAN_PRESENT_FLAG);
558 return 0;
559}
560
561static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
562{
563 struct list_head *head;
564 struct f2fs_orphan_block *orphan_blk = NULL;
565 unsigned int nentries = 0;
566 unsigned short index = 1;
567 unsigned short orphan_blocks;
568 struct page *page = NULL;
569 struct ino_entry *orphan = NULL;
570 struct inode_management *im = &sbi->im[ORPHAN_INO];
571
572 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
573
574 /*
575 * we don't need to do spin_lock(&im->ino_lock) here, since all the
576 * orphan inode operations are covered under f2fs_lock_op().
577 * And, spin_lock should be avoided due to page operations below.
578 */
579 head = &im->ino_list;
580
581 /* loop for each orphan inode entry and write them in Jornal block */
582 list_for_each_entry(orphan, head, list) {
583 if (!page) {
584 page = grab_meta_page(sbi, start_blk++);
585 orphan_blk =
586 (struct f2fs_orphan_block *)page_address(page);
587 memset(orphan_blk, 0, sizeof(*orphan_blk));
588 }
589
590 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
591
592 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
593 /*
594 * an orphan block is full of 1020 entries,
595 * then we need to flush current orphan blocks
596 * and bring another one in memory
597 */
598 orphan_blk->blk_addr = cpu_to_le16(index);
599 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
600 orphan_blk->entry_count = cpu_to_le32(nentries);
601 set_page_dirty(page);
602 f2fs_put_page(page, 1);
603 index++;
604 nentries = 0;
605 page = NULL;
606 }
607 }
608
609 if (page) {
610 orphan_blk->blk_addr = cpu_to_le16(index);
611 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
612 orphan_blk->entry_count = cpu_to_le32(nentries);
613 set_page_dirty(page);
614 f2fs_put_page(page, 1);
615 }
616}
617
618static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
619 block_t cp_addr, unsigned long long *version)
620{
621 struct page *cp_page_1, *cp_page_2 = NULL;
622 unsigned long blk_size = sbi->blocksize;
623 struct f2fs_checkpoint *cp_block;
624 unsigned long long cur_version = 0, pre_version = 0;
625 size_t crc_offset;
626 __u32 crc = 0;
627
628 /* Read the 1st cp block in this CP pack */
629 cp_page_1 = get_meta_page(sbi, cp_addr);
630
631 /* get the version number */
632 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_1);
633 crc_offset = le32_to_cpu(cp_block->checksum_offset);
634 if (crc_offset >= blk_size)
635 goto invalid_cp1;
636
637 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
638 if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
639 goto invalid_cp1;
640
641 pre_version = cur_cp_version(cp_block);
642
643 /* Read the 2nd cp block in this CP pack */
644 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
645 cp_page_2 = get_meta_page(sbi, cp_addr);
646
647 cp_block = (struct f2fs_checkpoint *)page_address(cp_page_2);
648 crc_offset = le32_to_cpu(cp_block->checksum_offset);
649 if (crc_offset >= blk_size)
650 goto invalid_cp2;
651
652 crc = le32_to_cpu(*((__le32 *)((unsigned char *)cp_block + crc_offset)));
653 if (!f2fs_crc_valid(sbi, crc, cp_block, crc_offset))
654 goto invalid_cp2;
655
656 cur_version = cur_cp_version(cp_block);
657
658 if (cur_version == pre_version) {
659 *version = cur_version;
660 f2fs_put_page(cp_page_2, 1);
661 return cp_page_1;
662 }
663invalid_cp2:
664 f2fs_put_page(cp_page_2, 1);
665invalid_cp1:
666 f2fs_put_page(cp_page_1, 1);
667 return NULL;
668}
669
670int get_valid_checkpoint(struct f2fs_sb_info *sbi)
671{
672 struct f2fs_checkpoint *cp_block;
673 struct f2fs_super_block *fsb = sbi->raw_super;
674 struct page *cp1, *cp2, *cur_page;
675 unsigned long blk_size = sbi->blocksize;
676 unsigned long long cp1_version = 0, cp2_version = 0;
677 unsigned long long cp_start_blk_no;
678 unsigned int cp_blks = 1 + __cp_payload(sbi);
679 block_t cp_blk_no;
680 int i;
681
682 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
683 if (!sbi->ckpt)
684 return -ENOMEM;
685 /*
686 * Finding out valid cp block involves read both
687 * sets( cp pack1 and cp pack 2)
688 */
689 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
690 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
691
692 /* The second checkpoint pack should start at the next segment */
693 cp_start_blk_no += ((unsigned long long)1) <<
694 le32_to_cpu(fsb->log_blocks_per_seg);
695 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
696
697 if (cp1 && cp2) {
698 if (ver_after(cp2_version, cp1_version))
699 cur_page = cp2;
700 else
701 cur_page = cp1;
702 } else if (cp1) {
703 cur_page = cp1;
704 } else if (cp2) {
705 cur_page = cp2;
706 } else {
707 goto fail_no_cp;
708 }
709
710 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
711 memcpy(sbi->ckpt, cp_block, blk_size);
712
713 /* Sanity checking of checkpoint */
714 if (sanity_check_ckpt(sbi))
715 goto fail_no_cp;
716
717 if (cp_blks <= 1)
718 goto done;
719
720 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
721 if (cur_page == cp2)
722 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
723
724 for (i = 1; i < cp_blks; i++) {
725 void *sit_bitmap_ptr;
726 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
727
728 cur_page = get_meta_page(sbi, cp_blk_no + i);
729 sit_bitmap_ptr = page_address(cur_page);
730 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
731 f2fs_put_page(cur_page, 1);
732 }
733done:
734 f2fs_put_page(cp1, 1);
735 f2fs_put_page(cp2, 1);
736 return 0;
737
738fail_no_cp:
739 kfree(sbi->ckpt);
740 return -EINVAL;
741}
742
743static void __add_dirty_inode(struct inode *inode, enum inode_type type)
744{
745 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
746 struct f2fs_inode_info *fi = F2FS_I(inode);
747 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
748
749 if (is_inode_flag_set(fi, flag))
750 return;
751
752 set_inode_flag(fi, flag);
753 list_add_tail(&fi->dirty_list, &sbi->inode_list[type]);
754 stat_inc_dirty_inode(sbi, type);
755}
756
757static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
758{
759 struct f2fs_inode_info *fi = F2FS_I(inode);
760 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
761
762 if (get_dirty_pages(inode) ||
763 !is_inode_flag_set(F2FS_I(inode), flag))
764 return;
765
766 list_del_init(&fi->dirty_list);
767 clear_inode_flag(fi, flag);
768 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
769}
770
771void update_dirty_page(struct inode *inode, struct page *page)
772{
773 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
774 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
775
776 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
777 !S_ISLNK(inode->i_mode))
778 return;
779
780 spin_lock(&sbi->inode_lock[type]);
781 __add_dirty_inode(inode, type);
782 inode_inc_dirty_pages(inode);
783 spin_unlock(&sbi->inode_lock[type]);
784
785 SetPagePrivate(page);
786 f2fs_trace_pid(page);
787}
788
789void add_dirty_dir_inode(struct inode *inode)
790{
791 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
792
793 spin_lock(&sbi->inode_lock[DIR_INODE]);
794 __add_dirty_inode(inode, DIR_INODE);
795 spin_unlock(&sbi->inode_lock[DIR_INODE]);
796}
797
798void remove_dirty_inode(struct inode *inode)
799{
800 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
801 struct f2fs_inode_info *fi = F2FS_I(inode);
802 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
803
804 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
805 !S_ISLNK(inode->i_mode))
806 return;
807
808 spin_lock(&sbi->inode_lock[type]);
809 __remove_dirty_inode(inode, type);
810 spin_unlock(&sbi->inode_lock[type]);
811
812 /* Only from the recovery routine */
813 if (is_inode_flag_set(fi, FI_DELAY_IPUT)) {
814 clear_inode_flag(fi, FI_DELAY_IPUT);
815 iput(inode);
816 }
817}
818
819int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
820{
821 struct list_head *head;
822 struct inode *inode;
823 struct f2fs_inode_info *fi;
824 bool is_dir = (type == DIR_INODE);
825
826 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
827 get_pages(sbi, is_dir ?
828 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
829retry:
830 if (unlikely(f2fs_cp_error(sbi)))
831 return -EIO;
832
833 spin_lock(&sbi->inode_lock[type]);
834
835 head = &sbi->inode_list[type];
836 if (list_empty(head)) {
837 spin_unlock(&sbi->inode_lock[type]);
838 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
839 get_pages(sbi, is_dir ?
840 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
841 return 0;
842 }
843 fi = list_entry(head->next, struct f2fs_inode_info, dirty_list);
844 inode = igrab(&fi->vfs_inode);
845 spin_unlock(&sbi->inode_lock[type]);
846 if (inode) {
847 filemap_fdatawrite(inode->i_mapping);
848 iput(inode);
849 } else {
850 /*
851 * We should submit bio, since it exists several
852 * wribacking dentry pages in the freeing inode.
853 */
854 f2fs_submit_merged_bio(sbi, DATA, WRITE);
855 cond_resched();
856 }
857 goto retry;
858}
859
860/*
861 * Freeze all the FS-operations for checkpoint.
862 */
863static int block_operations(struct f2fs_sb_info *sbi)
864{
865 struct writeback_control wbc = {
866 .sync_mode = WB_SYNC_ALL,
867 .nr_to_write = LONG_MAX,
868 .for_reclaim = 0,
869 };
870 struct blk_plug plug;
871 int err = 0;
872
873 blk_start_plug(&plug);
874
875retry_flush_dents:
876 f2fs_lock_all(sbi);
877 /* write all the dirty dentry pages */
878 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
879 f2fs_unlock_all(sbi);
880 err = sync_dirty_inodes(sbi, DIR_INODE);
881 if (err)
882 goto out;
883 goto retry_flush_dents;
884 }
885
886 /*
887 * POR: we should ensure that there are no dirty node pages
888 * until finishing nat/sit flush.
889 */
890retry_flush_nodes:
891 down_write(&sbi->node_write);
892
893 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
894 up_write(&sbi->node_write);
895 err = sync_node_pages(sbi, 0, &wbc);
896 if (err) {
897 f2fs_unlock_all(sbi);
898 goto out;
899 }
900 goto retry_flush_nodes;
901 }
902out:
903 blk_finish_plug(&plug);
904 return err;
905}
906
907static void unblock_operations(struct f2fs_sb_info *sbi)
908{
909 up_write(&sbi->node_write);
910 f2fs_unlock_all(sbi);
911}
912
913static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
914{
915 DEFINE_WAIT(wait);
916
917 for (;;) {
918 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
919
920 if (!get_pages(sbi, F2FS_WRITEBACK))
921 break;
922
923 io_schedule_timeout(5*HZ);
924 }
925 finish_wait(&sbi->cp_wait, &wait);
926}
927
928static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
929{
930 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
931 struct curseg_info *curseg = CURSEG_I(sbi, CURSEG_WARM_NODE);
932 struct f2fs_nm_info *nm_i = NM_I(sbi);
933 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
934 nid_t last_nid = nm_i->next_scan_nid;
935 block_t start_blk;
936 unsigned int data_sum_blocks, orphan_blocks;
937 __u32 crc32 = 0;
938 int i;
939 int cp_payload_blks = __cp_payload(sbi);
940 block_t discard_blk = NEXT_FREE_BLKADDR(sbi, curseg);
941 bool invalidate = false;
942 struct super_block *sb = sbi->sb;
943 struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
944 u64 kbytes_written;
945
946 /*
947 * This avoids to conduct wrong roll-forward operations and uses
948 * metapages, so should be called prior to sync_meta_pages below.
949 */
950 if (discard_next_dnode(sbi, discard_blk))
951 invalidate = true;
952
953 /* Flush all the NAT/SIT pages */
954 while (get_pages(sbi, F2FS_DIRTY_META)) {
955 sync_meta_pages(sbi, META, LONG_MAX);
956 if (unlikely(f2fs_cp_error(sbi)))
957 return -EIO;
958 }
959
960 next_free_nid(sbi, &last_nid);
961
962 /*
963 * modify checkpoint
964 * version number is already updated
965 */
966 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
967 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
968 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
969 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
970 ckpt->cur_node_segno[i] =
971 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
972 ckpt->cur_node_blkoff[i] =
973 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
974 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
975 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
976 }
977 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
978 ckpt->cur_data_segno[i] =
979 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
980 ckpt->cur_data_blkoff[i] =
981 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
982 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
983 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
984 }
985
986 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
987 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
988 ckpt->next_free_nid = cpu_to_le32(last_nid);
989
990 /* 2 cp + n data seg summary + orphan inode blocks */
991 data_sum_blocks = npages_for_summary_flush(sbi, false);
992 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
993 set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
994 else
995 clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
996
997 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
998 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
999 orphan_blocks);
1000
1001 if (__remain_node_summaries(cpc->reason))
1002 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
1003 cp_payload_blks + data_sum_blocks +
1004 orphan_blocks + NR_CURSEG_NODE_TYPE);
1005 else
1006 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1007 cp_payload_blks + data_sum_blocks +
1008 orphan_blocks);
1009
1010 if (cpc->reason == CP_UMOUNT)
1011 set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1012 else
1013 clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1014
1015 if (cpc->reason == CP_FASTBOOT)
1016 set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1017 else
1018 clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1019
1020 if (orphan_num)
1021 set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1022 else
1023 clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1024
1025 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1026 set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1027
1028 /* update SIT/NAT bitmap */
1029 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1030 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1031
1032 crc32 = f2fs_crc32(sbi, ckpt, le32_to_cpu(ckpt->checksum_offset));
1033 *((__le32 *)((unsigned char *)ckpt +
1034 le32_to_cpu(ckpt->checksum_offset)))
1035 = cpu_to_le32(crc32);
1036
1037 start_blk = __start_cp_addr(sbi);
1038
1039 /* need to wait for end_io results */
1040 wait_on_all_pages_writeback(sbi);
1041 if (unlikely(f2fs_cp_error(sbi)))
1042 return -EIO;
1043
1044 /* write out checkpoint buffer at block 0 */
1045 update_meta_page(sbi, ckpt, start_blk++);
1046
1047 for (i = 1; i < 1 + cp_payload_blks; i++)
1048 update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1049 start_blk++);
1050
1051 if (orphan_num) {
1052 write_orphan_inodes(sbi, start_blk);
1053 start_blk += orphan_blocks;
1054 }
1055
1056 write_data_summaries(sbi, start_blk);
1057 start_blk += data_sum_blocks;
1058
1059 /* Record write statistics in the hot node summary */
1060 kbytes_written = sbi->kbytes_written;
1061 if (sb->s_bdev->bd_part)
1062 kbytes_written += BD_PART_WRITTEN(sbi);
1063
1064 seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1065
1066 if (__remain_node_summaries(cpc->reason)) {
1067 write_node_summaries(sbi, start_blk);
1068 start_blk += NR_CURSEG_NODE_TYPE;
1069 }
1070
1071 /* writeout checkpoint block */
1072 update_meta_page(sbi, ckpt, start_blk);
1073
1074 /* wait for previous submitted node/meta pages writeback */
1075 wait_on_all_pages_writeback(sbi);
1076
1077 if (unlikely(f2fs_cp_error(sbi)))
1078 return -EIO;
1079
1080 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LLONG_MAX);
1081 filemap_fdatawait_range(META_MAPPING(sbi), 0, LLONG_MAX);
1082
1083 /* update user_block_counts */
1084 sbi->last_valid_block_count = sbi->total_valid_block_count;
1085 sbi->alloc_valid_block_count = 0;
1086
1087 /* Here, we only have one bio having CP pack */
1088 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
1089
1090 /* wait for previous submitted meta pages writeback */
1091 wait_on_all_pages_writeback(sbi);
1092
1093 /*
1094 * invalidate meta page which is used temporarily for zeroing out
1095 * block at the end of warm node chain.
1096 */
1097 if (invalidate)
1098 invalidate_mapping_pages(META_MAPPING(sbi), discard_blk,
1099 discard_blk);
1100
1101 release_ino_entry(sbi);
1102
1103 if (unlikely(f2fs_cp_error(sbi)))
1104 return -EIO;
1105
1106 clear_prefree_segments(sbi, cpc);
1107 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1108
1109 return 0;
1110}
1111
1112/*
1113 * We guarantee that this checkpoint procedure will not fail.
1114 */
1115int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1116{
1117 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1118 unsigned long long ckpt_ver;
1119 int err = 0;
1120
1121 mutex_lock(&sbi->cp_mutex);
1122
1123 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1124 (cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC ||
1125 (cpc->reason == CP_DISCARD && !sbi->discard_blks)))
1126 goto out;
1127 if (unlikely(f2fs_cp_error(sbi))) {
1128 err = -EIO;
1129 goto out;
1130 }
1131 if (f2fs_readonly(sbi->sb)) {
1132 err = -EROFS;
1133 goto out;
1134 }
1135
1136 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1137
1138 err = block_operations(sbi);
1139 if (err)
1140 goto out;
1141
1142 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1143
1144 f2fs_flush_merged_bios(sbi);
1145
1146 /*
1147 * update checkpoint pack index
1148 * Increase the version number so that
1149 * SIT entries and seg summaries are written at correct place
1150 */
1151 ckpt_ver = cur_cp_version(ckpt);
1152 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1153
1154 /* write cached NAT/SIT entries to NAT/SIT area */
1155 flush_nat_entries(sbi);
1156 flush_sit_entries(sbi, cpc);
1157
1158 /* unlock all the fs_lock[] in do_checkpoint() */
1159 err = do_checkpoint(sbi, cpc);
1160
1161 unblock_operations(sbi);
1162 stat_inc_cp_count(sbi->stat_info);
1163
1164 if (cpc->reason == CP_RECOVERY)
1165 f2fs_msg(sbi->sb, KERN_NOTICE,
1166 "checkpoint: version = %llx", ckpt_ver);
1167
1168 /* do checkpoint periodically */
1169 f2fs_update_time(sbi, CP_TIME);
1170 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1171out:
1172 mutex_unlock(&sbi->cp_mutex);
1173 return err;
1174}
1175
1176void init_ino_entry_info(struct f2fs_sb_info *sbi)
1177{
1178 int i;
1179
1180 for (i = 0; i < MAX_INO_ENTRY; i++) {
1181 struct inode_management *im = &sbi->im[i];
1182
1183 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1184 spin_lock_init(&im->ino_lock);
1185 INIT_LIST_HEAD(&im->ino_list);
1186 im->ino_num = 0;
1187 }
1188
1189 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1190 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1191 F2FS_ORPHANS_PER_BLOCK;
1192}
1193
1194int __init create_checkpoint_caches(void)
1195{
1196 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1197 sizeof(struct ino_entry));
1198 if (!ino_entry_slab)
1199 return -ENOMEM;
1200 inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1201 sizeof(struct inode_entry));
1202 if (!inode_entry_slab) {
1203 kmem_cache_destroy(ino_entry_slab);
1204 return -ENOMEM;
1205 }
1206 return 0;
1207}
1208
1209void destroy_checkpoint_caches(void)
1210{
1211 kmem_cache_destroy(ino_entry_slab);
1212 kmem_cache_destroy(inode_entry_slab);
1213}
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
53/*
54 * We guarantee no failure on the returned page.
55 */
56static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
57 bool is_meta)
58{
59 struct address_space *mapping = META_MAPPING(sbi);
60 struct page *page;
61 struct f2fs_io_info fio = {
62 .sbi = sbi,
63 .type = META,
64 .op = REQ_OP_READ,
65 .op_flags = REQ_META | REQ_PRIO,
66 .old_blkaddr = index,
67 .new_blkaddr = index,
68 .encrypted_page = NULL,
69 .is_por = !is_meta,
70 };
71 int err;
72
73 if (unlikely(!is_meta))
74 fio.op_flags &= ~REQ_META;
75repeat:
76 page = f2fs_grab_cache_page(mapping, index, false);
77 if (!page) {
78 cond_resched();
79 goto repeat;
80 }
81 if (PageUptodate(page))
82 goto out;
83
84 fio.page = page;
85
86 err = f2fs_submit_page_bio(&fio);
87 if (err) {
88 f2fs_put_page(page, 1);
89 return ERR_PTR(err);
90 }
91
92 lock_page(page);
93 if (unlikely(page->mapping != mapping)) {
94 f2fs_put_page(page, 1);
95 goto repeat;
96 }
97
98 if (unlikely(!PageUptodate(page))) {
99 f2fs_put_page(page, 1);
100 return ERR_PTR(-EIO);
101 }
102out:
103 return page;
104}
105
106struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
107{
108 return __get_meta_page(sbi, index, true);
109}
110
111struct page *f2fs_get_meta_page_nofail(struct f2fs_sb_info *sbi, pgoff_t index)
112{
113 struct page *page;
114 int count = 0;
115
116retry:
117 page = __get_meta_page(sbi, index, true);
118 if (IS_ERR(page)) {
119 if (PTR_ERR(page) == -EIO &&
120 ++count <= DEFAULT_RETRY_IO_COUNT)
121 goto retry;
122 f2fs_stop_checkpoint(sbi, false);
123 }
124 return page;
125}
126
127/* for POR only */
128struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
129{
130 return __get_meta_page(sbi, index, false);
131}
132
133static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
134 int type)
135{
136 struct seg_entry *se;
137 unsigned int segno, offset;
138 bool exist;
139
140 if (type != DATA_GENERIC_ENHANCE && type != DATA_GENERIC_ENHANCE_READ)
141 return true;
142
143 segno = GET_SEGNO(sbi, blkaddr);
144 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
145 se = get_seg_entry(sbi, segno);
146
147 exist = f2fs_test_bit(offset, se->cur_valid_map);
148 if (!exist && type == DATA_GENERIC_ENHANCE) {
149 f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
150 blkaddr, exist);
151 set_sbi_flag(sbi, SBI_NEED_FSCK);
152 WARN_ON(1);
153 }
154 return exist;
155}
156
157bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
158 block_t blkaddr, int type)
159{
160 switch (type) {
161 case META_NAT:
162 break;
163 case META_SIT:
164 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
165 return false;
166 break;
167 case META_SSA:
168 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
169 blkaddr < SM_I(sbi)->ssa_blkaddr))
170 return false;
171 break;
172 case META_CP:
173 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
174 blkaddr < __start_cp_addr(sbi)))
175 return false;
176 break;
177 case META_POR:
178 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
179 blkaddr < MAIN_BLKADDR(sbi)))
180 return false;
181 break;
182 case DATA_GENERIC:
183 case DATA_GENERIC_ENHANCE:
184 case DATA_GENERIC_ENHANCE_READ:
185 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
186 blkaddr < MAIN_BLKADDR(sbi))) {
187 f2fs_warn(sbi, "access invalid blkaddr:%u",
188 blkaddr);
189 set_sbi_flag(sbi, SBI_NEED_FSCK);
190 WARN_ON(1);
191 return false;
192 } else {
193 return __is_bitmap_valid(sbi, blkaddr, type);
194 }
195 break;
196 case META_GENERIC:
197 if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
198 blkaddr >= MAIN_BLKADDR(sbi)))
199 return false;
200 break;
201 default:
202 BUG();
203 }
204
205 return true;
206}
207
208/*
209 * Readahead CP/NAT/SIT/SSA pages
210 */
211int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
212 int type, bool sync)
213{
214 struct page *page;
215 block_t blkno = start;
216 struct f2fs_io_info fio = {
217 .sbi = sbi,
218 .type = META,
219 .op = REQ_OP_READ,
220 .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
221 .encrypted_page = NULL,
222 .in_list = false,
223 .is_por = (type == META_POR),
224 };
225 struct blk_plug plug;
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 f2fs_submit_page_bio(&fio);
270 f2fs_put_page(page, 0);
271 }
272out:
273 blk_finish_plug(&plug);
274 return blkno - start;
275}
276
277void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
278{
279 struct page *page;
280 bool readahead = false;
281
282 page = find_get_page(META_MAPPING(sbi), index);
283 if (!page || !PageUptodate(page))
284 readahead = true;
285 f2fs_put_page(page, 0);
286
287 if (readahead)
288 f2fs_ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
289}
290
291static int __f2fs_write_meta_page(struct page *page,
292 struct writeback_control *wbc,
293 enum iostat_type io_type)
294{
295 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
296
297 trace_f2fs_writepage(page, META);
298
299 if (unlikely(f2fs_cp_error(sbi)))
300 goto redirty_out;
301 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
302 goto redirty_out;
303 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
304 goto redirty_out;
305
306 f2fs_do_write_meta_page(sbi, page, io_type);
307 dec_page_count(sbi, F2FS_DIRTY_META);
308
309 if (wbc->for_reclaim)
310 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, META);
311
312 unlock_page(page);
313
314 if (unlikely(f2fs_cp_error(sbi)))
315 f2fs_submit_merged_write(sbi, META);
316
317 return 0;
318
319redirty_out:
320 redirty_page_for_writepage(wbc, page);
321 return AOP_WRITEPAGE_ACTIVATE;
322}
323
324static int f2fs_write_meta_page(struct page *page,
325 struct writeback_control *wbc)
326{
327 return __f2fs_write_meta_page(page, wbc, FS_META_IO);
328}
329
330static int f2fs_write_meta_pages(struct address_space *mapping,
331 struct writeback_control *wbc)
332{
333 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
334 long diff, written;
335
336 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
337 goto skip_write;
338
339 /* collect a number of dirty meta pages and write together */
340 if (wbc->sync_mode != WB_SYNC_ALL &&
341 get_pages(sbi, F2FS_DIRTY_META) <
342 nr_pages_to_skip(sbi, META))
343 goto skip_write;
344
345 /* if locked failed, cp will flush dirty pages instead */
346 if (!mutex_trylock(&sbi->cp_mutex))
347 goto skip_write;
348
349 trace_f2fs_writepages(mapping->host, wbc, META);
350 diff = nr_pages_to_write(sbi, META, wbc);
351 written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO);
352 mutex_unlock(&sbi->cp_mutex);
353 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
354 return 0;
355
356skip_write:
357 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
358 trace_f2fs_writepages(mapping->host, wbc, META);
359 return 0;
360}
361
362long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
363 long nr_to_write, enum iostat_type io_type)
364{
365 struct address_space *mapping = META_MAPPING(sbi);
366 pgoff_t index = 0, prev = ULONG_MAX;
367 struct pagevec pvec;
368 long nwritten = 0;
369 int nr_pages;
370 struct writeback_control wbc = {
371 .for_reclaim = 0,
372 };
373 struct blk_plug plug;
374
375 pagevec_init(&pvec);
376
377 blk_start_plug(&plug);
378
379 while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
380 PAGECACHE_TAG_DIRTY))) {
381 int i;
382
383 for (i = 0; i < nr_pages; i++) {
384 struct page *page = pvec.pages[i];
385
386 if (prev == ULONG_MAX)
387 prev = page->index - 1;
388 if (nr_to_write != LONG_MAX && page->index != prev + 1) {
389 pagevec_release(&pvec);
390 goto stop;
391 }
392
393 lock_page(page);
394
395 if (unlikely(page->mapping != mapping)) {
396continue_unlock:
397 unlock_page(page);
398 continue;
399 }
400 if (!PageDirty(page)) {
401 /* someone wrote it for us */
402 goto continue_unlock;
403 }
404
405 f2fs_wait_on_page_writeback(page, META, true, true);
406
407 if (!clear_page_dirty_for_io(page))
408 goto continue_unlock;
409
410 if (__f2fs_write_meta_page(page, &wbc, io_type)) {
411 unlock_page(page);
412 break;
413 }
414 nwritten++;
415 prev = page->index;
416 if (unlikely(nwritten >= nr_to_write))
417 break;
418 }
419 pagevec_release(&pvec);
420 cond_resched();
421 }
422stop:
423 if (nwritten)
424 f2fs_submit_merged_write(sbi, type);
425
426 blk_finish_plug(&plug);
427
428 return nwritten;
429}
430
431static int f2fs_set_meta_page_dirty(struct page *page)
432{
433 trace_f2fs_set_page_dirty(page, META);
434
435 if (!PageUptodate(page))
436 SetPageUptodate(page);
437 if (!PageDirty(page)) {
438 __set_page_dirty_nobuffers(page);
439 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
440 f2fs_set_page_private(page, 0);
441 f2fs_trace_pid(page);
442 return 1;
443 }
444 return 0;
445}
446
447const struct address_space_operations f2fs_meta_aops = {
448 .writepage = f2fs_write_meta_page,
449 .writepages = f2fs_write_meta_pages,
450 .set_page_dirty = f2fs_set_meta_page_dirty,
451 .invalidatepage = f2fs_invalidate_page,
452 .releasepage = f2fs_release_page,
453#ifdef CONFIG_MIGRATION
454 .migratepage = f2fs_migrate_page,
455#endif
456};
457
458static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
459 unsigned int devidx, int type)
460{
461 struct inode_management *im = &sbi->im[type];
462 struct ino_entry *e, *tmp;
463
464 tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
465
466 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
467
468 spin_lock(&im->ino_lock);
469 e = radix_tree_lookup(&im->ino_root, ino);
470 if (!e) {
471 e = tmp;
472 if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
473 f2fs_bug_on(sbi, 1);
474
475 memset(e, 0, sizeof(struct ino_entry));
476 e->ino = ino;
477
478 list_add_tail(&e->list, &im->ino_list);
479 if (type != ORPHAN_INO)
480 im->ino_num++;
481 }
482
483 if (type == FLUSH_INO)
484 f2fs_set_bit(devidx, (char *)&e->dirty_device);
485
486 spin_unlock(&im->ino_lock);
487 radix_tree_preload_end();
488
489 if (e != tmp)
490 kmem_cache_free(ino_entry_slab, tmp);
491}
492
493static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
494{
495 struct inode_management *im = &sbi->im[type];
496 struct ino_entry *e;
497
498 spin_lock(&im->ino_lock);
499 e = radix_tree_lookup(&im->ino_root, ino);
500 if (e) {
501 list_del(&e->list);
502 radix_tree_delete(&im->ino_root, ino);
503 im->ino_num--;
504 spin_unlock(&im->ino_lock);
505 kmem_cache_free(ino_entry_slab, e);
506 return;
507 }
508 spin_unlock(&im->ino_lock);
509}
510
511void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
512{
513 /* add new dirty ino entry into list */
514 __add_ino_entry(sbi, ino, 0, type);
515}
516
517void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
518{
519 /* remove dirty ino entry from list */
520 __remove_ino_entry(sbi, ino, type);
521}
522
523/* mode should be APPEND_INO or UPDATE_INO */
524bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
525{
526 struct inode_management *im = &sbi->im[mode];
527 struct ino_entry *e;
528
529 spin_lock(&im->ino_lock);
530 e = radix_tree_lookup(&im->ino_root, ino);
531 spin_unlock(&im->ino_lock);
532 return e ? true : false;
533}
534
535void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all)
536{
537 struct ino_entry *e, *tmp;
538 int i;
539
540 for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; i++) {
541 struct inode_management *im = &sbi->im[i];
542
543 spin_lock(&im->ino_lock);
544 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
545 list_del(&e->list);
546 radix_tree_delete(&im->ino_root, e->ino);
547 kmem_cache_free(ino_entry_slab, e);
548 im->ino_num--;
549 }
550 spin_unlock(&im->ino_lock);
551 }
552}
553
554void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
555 unsigned int devidx, int type)
556{
557 __add_ino_entry(sbi, ino, devidx, type);
558}
559
560bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
561 unsigned int devidx, int type)
562{
563 struct inode_management *im = &sbi->im[type];
564 struct ino_entry *e;
565 bool is_dirty = false;
566
567 spin_lock(&im->ino_lock);
568 e = radix_tree_lookup(&im->ino_root, ino);
569 if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device))
570 is_dirty = true;
571 spin_unlock(&im->ino_lock);
572 return is_dirty;
573}
574
575int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi)
576{
577 struct inode_management *im = &sbi->im[ORPHAN_INO];
578 int err = 0;
579
580 spin_lock(&im->ino_lock);
581
582 if (time_to_inject(sbi, FAULT_ORPHAN)) {
583 spin_unlock(&im->ino_lock);
584 f2fs_show_injection_info(FAULT_ORPHAN);
585 return -ENOSPC;
586 }
587
588 if (unlikely(im->ino_num >= sbi->max_orphans))
589 err = -ENOSPC;
590 else
591 im->ino_num++;
592 spin_unlock(&im->ino_lock);
593
594 return err;
595}
596
597void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi)
598{
599 struct inode_management *im = &sbi->im[ORPHAN_INO];
600
601 spin_lock(&im->ino_lock);
602 f2fs_bug_on(sbi, im->ino_num == 0);
603 im->ino_num--;
604 spin_unlock(&im->ino_lock);
605}
606
607void f2fs_add_orphan_inode(struct inode *inode)
608{
609 /* add new orphan ino entry into list */
610 __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO);
611 f2fs_update_inode_page(inode);
612}
613
614void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
615{
616 /* remove orphan entry from orphan list */
617 __remove_ino_entry(sbi, ino, ORPHAN_INO);
618}
619
620static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
621{
622 struct inode *inode;
623 struct node_info ni;
624 int err;
625
626 inode = f2fs_iget_retry(sbi->sb, ino);
627 if (IS_ERR(inode)) {
628 /*
629 * there should be a bug that we can't find the entry
630 * to orphan inode.
631 */
632 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
633 return PTR_ERR(inode);
634 }
635
636 err = dquot_initialize(inode);
637 if (err) {
638 iput(inode);
639 goto err_out;
640 }
641
642 clear_nlink(inode);
643
644 /* truncate all the data during iput */
645 iput(inode);
646
647 err = f2fs_get_node_info(sbi, ino, &ni);
648 if (err)
649 goto err_out;
650
651 /* ENOMEM was fully retried in f2fs_evict_inode. */
652 if (ni.blk_addr != NULL_ADDR) {
653 err = -EIO;
654 goto err_out;
655 }
656 return 0;
657
658err_out:
659 set_sbi_flag(sbi, SBI_NEED_FSCK);
660 f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
661 __func__, ino);
662 return err;
663}
664
665int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
666{
667 block_t start_blk, orphan_blocks, i, j;
668 unsigned int s_flags = sbi->sb->s_flags;
669 int err = 0;
670#ifdef CONFIG_QUOTA
671 int quota_enabled;
672#endif
673
674 if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
675 return 0;
676
677 if (bdev_read_only(sbi->sb->s_bdev)) {
678 f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
679 return 0;
680 }
681
682 if (s_flags & SB_RDONLY) {
683 f2fs_info(sbi, "orphan cleanup on readonly fs");
684 sbi->sb->s_flags &= ~SB_RDONLY;
685 }
686
687#ifdef CONFIG_QUOTA
688 /* Needed for iput() to work correctly and not trash data */
689 sbi->sb->s_flags |= SB_ACTIVE;
690
691 /*
692 * Turn on quotas which were not enabled for read-only mounts if
693 * filesystem has quota feature, so that they are updated correctly.
694 */
695 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
696#endif
697
698 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
699 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
700
701 f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
702
703 for (i = 0; i < orphan_blocks; i++) {
704 struct page *page;
705 struct f2fs_orphan_block *orphan_blk;
706
707 page = f2fs_get_meta_page(sbi, start_blk + i);
708 if (IS_ERR(page)) {
709 err = PTR_ERR(page);
710 goto out;
711 }
712
713 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
714 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
715 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
716 err = recover_orphan_inode(sbi, ino);
717 if (err) {
718 f2fs_put_page(page, 1);
719 goto out;
720 }
721 }
722 f2fs_put_page(page, 1);
723 }
724 /* clear Orphan Flag */
725 clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
726out:
727 set_sbi_flag(sbi, SBI_IS_RECOVERED);
728
729#ifdef CONFIG_QUOTA
730 /* Turn quotas off */
731 if (quota_enabled)
732 f2fs_quota_off_umount(sbi->sb);
733#endif
734 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
735
736 return err;
737}
738
739static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
740{
741 struct list_head *head;
742 struct f2fs_orphan_block *orphan_blk = NULL;
743 unsigned int nentries = 0;
744 unsigned short index = 1;
745 unsigned short orphan_blocks;
746 struct page *page = NULL;
747 struct ino_entry *orphan = NULL;
748 struct inode_management *im = &sbi->im[ORPHAN_INO];
749
750 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
751
752 /*
753 * we don't need to do spin_lock(&im->ino_lock) here, since all the
754 * orphan inode operations are covered under f2fs_lock_op().
755 * And, spin_lock should be avoided due to page operations below.
756 */
757 head = &im->ino_list;
758
759 /* loop for each orphan inode entry and write them in Jornal block */
760 list_for_each_entry(orphan, head, list) {
761 if (!page) {
762 page = f2fs_grab_meta_page(sbi, start_blk++);
763 orphan_blk =
764 (struct f2fs_orphan_block *)page_address(page);
765 memset(orphan_blk, 0, sizeof(*orphan_blk));
766 }
767
768 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
769
770 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
771 /*
772 * an orphan block is full of 1020 entries,
773 * then we need to flush current orphan blocks
774 * and bring another one in memory
775 */
776 orphan_blk->blk_addr = cpu_to_le16(index);
777 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
778 orphan_blk->entry_count = cpu_to_le32(nentries);
779 set_page_dirty(page);
780 f2fs_put_page(page, 1);
781 index++;
782 nentries = 0;
783 page = NULL;
784 }
785 }
786
787 if (page) {
788 orphan_blk->blk_addr = cpu_to_le16(index);
789 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
790 orphan_blk->entry_count = cpu_to_le32(nentries);
791 set_page_dirty(page);
792 f2fs_put_page(page, 1);
793 }
794}
795
796static __u32 f2fs_checkpoint_chksum(struct f2fs_sb_info *sbi,
797 struct f2fs_checkpoint *ckpt)
798{
799 unsigned int chksum_ofs = le32_to_cpu(ckpt->checksum_offset);
800 __u32 chksum;
801
802 chksum = f2fs_crc32(sbi, ckpt, chksum_ofs);
803 if (chksum_ofs < CP_CHKSUM_OFFSET) {
804 chksum_ofs += sizeof(chksum);
805 chksum = f2fs_chksum(sbi, chksum, (__u8 *)ckpt + chksum_ofs,
806 F2FS_BLKSIZE - chksum_ofs);
807 }
808 return chksum;
809}
810
811static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
812 struct f2fs_checkpoint **cp_block, struct page **cp_page,
813 unsigned long long *version)
814{
815 size_t crc_offset = 0;
816 __u32 crc;
817
818 *cp_page = f2fs_get_meta_page(sbi, cp_addr);
819 if (IS_ERR(*cp_page))
820 return PTR_ERR(*cp_page);
821
822 *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
823
824 crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
825 if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
826 crc_offset > CP_CHKSUM_OFFSET) {
827 f2fs_put_page(*cp_page, 1);
828 f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
829 return -EINVAL;
830 }
831
832 crc = f2fs_checkpoint_chksum(sbi, *cp_block);
833 if (crc != cur_cp_crc(*cp_block)) {
834 f2fs_put_page(*cp_page, 1);
835 f2fs_warn(sbi, "invalid crc value");
836 return -EINVAL;
837 }
838
839 *version = cur_cp_version(*cp_block);
840 return 0;
841}
842
843static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
844 block_t cp_addr, unsigned long long *version)
845{
846 struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
847 struct f2fs_checkpoint *cp_block = NULL;
848 unsigned long long cur_version = 0, pre_version = 0;
849 int err;
850
851 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
852 &cp_page_1, version);
853 if (err)
854 return NULL;
855
856 if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
857 sbi->blocks_per_seg) {
858 f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
859 le32_to_cpu(cp_block->cp_pack_total_block_count));
860 goto invalid_cp;
861 }
862 pre_version = *version;
863
864 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
865 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
866 &cp_page_2, version);
867 if (err)
868 goto invalid_cp;
869 cur_version = *version;
870
871 if (cur_version == pre_version) {
872 *version = cur_version;
873 f2fs_put_page(cp_page_2, 1);
874 return cp_page_1;
875 }
876 f2fs_put_page(cp_page_2, 1);
877invalid_cp:
878 f2fs_put_page(cp_page_1, 1);
879 return NULL;
880}
881
882int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
883{
884 struct f2fs_checkpoint *cp_block;
885 struct f2fs_super_block *fsb = sbi->raw_super;
886 struct page *cp1, *cp2, *cur_page;
887 unsigned long blk_size = sbi->blocksize;
888 unsigned long long cp1_version = 0, cp2_version = 0;
889 unsigned long long cp_start_blk_no;
890 unsigned int cp_blks = 1 + __cp_payload(sbi);
891 block_t cp_blk_no;
892 int i;
893 int err;
894
895 sbi->ckpt = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks),
896 GFP_KERNEL);
897 if (!sbi->ckpt)
898 return -ENOMEM;
899 /*
900 * Finding out valid cp block involves read both
901 * sets( cp pack1 and cp pack 2)
902 */
903 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
904 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
905
906 /* The second checkpoint pack should start at the next segment */
907 cp_start_blk_no += ((unsigned long long)1) <<
908 le32_to_cpu(fsb->log_blocks_per_seg);
909 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
910
911 if (cp1 && cp2) {
912 if (ver_after(cp2_version, cp1_version))
913 cur_page = cp2;
914 else
915 cur_page = cp1;
916 } else if (cp1) {
917 cur_page = cp1;
918 } else if (cp2) {
919 cur_page = cp2;
920 } else {
921 err = -EFSCORRUPTED;
922 goto fail_no_cp;
923 }
924
925 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
926 memcpy(sbi->ckpt, cp_block, blk_size);
927
928 if (cur_page == cp1)
929 sbi->cur_cp_pack = 1;
930 else
931 sbi->cur_cp_pack = 2;
932
933 /* Sanity checking of checkpoint */
934 if (f2fs_sanity_check_ckpt(sbi)) {
935 err = -EFSCORRUPTED;
936 goto free_fail_no_cp;
937 }
938
939 if (cp_blks <= 1)
940 goto done;
941
942 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
943 if (cur_page == cp2)
944 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
945
946 for (i = 1; i < cp_blks; i++) {
947 void *sit_bitmap_ptr;
948 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
949
950 cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
951 if (IS_ERR(cur_page)) {
952 err = PTR_ERR(cur_page);
953 goto free_fail_no_cp;
954 }
955 sit_bitmap_ptr = page_address(cur_page);
956 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
957 f2fs_put_page(cur_page, 1);
958 }
959done:
960 f2fs_put_page(cp1, 1);
961 f2fs_put_page(cp2, 1);
962 return 0;
963
964free_fail_no_cp:
965 f2fs_put_page(cp1, 1);
966 f2fs_put_page(cp2, 1);
967fail_no_cp:
968 kvfree(sbi->ckpt);
969 return err;
970}
971
972static void __add_dirty_inode(struct inode *inode, enum inode_type type)
973{
974 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
975 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
976
977 if (is_inode_flag_set(inode, flag))
978 return;
979
980 set_inode_flag(inode, flag);
981 if (!f2fs_is_volatile_file(inode))
982 list_add_tail(&F2FS_I(inode)->dirty_list,
983 &sbi->inode_list[type]);
984 stat_inc_dirty_inode(sbi, type);
985}
986
987static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
988{
989 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
990
991 if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
992 return;
993
994 list_del_init(&F2FS_I(inode)->dirty_list);
995 clear_inode_flag(inode, flag);
996 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
997}
998
999void f2fs_update_dirty_page(struct inode *inode, struct page *page)
1000{
1001 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1002 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1003
1004 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1005 !S_ISLNK(inode->i_mode))
1006 return;
1007
1008 spin_lock(&sbi->inode_lock[type]);
1009 if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
1010 __add_dirty_inode(inode, type);
1011 inode_inc_dirty_pages(inode);
1012 spin_unlock(&sbi->inode_lock[type]);
1013
1014 f2fs_set_page_private(page, 0);
1015 f2fs_trace_pid(page);
1016}
1017
1018void f2fs_remove_dirty_inode(struct inode *inode)
1019{
1020 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1021 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1022
1023 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1024 !S_ISLNK(inode->i_mode))
1025 return;
1026
1027 if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
1028 return;
1029
1030 spin_lock(&sbi->inode_lock[type]);
1031 __remove_dirty_inode(inode, type);
1032 spin_unlock(&sbi->inode_lock[type]);
1033}
1034
1035int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
1036{
1037 struct list_head *head;
1038 struct inode *inode;
1039 struct f2fs_inode_info *fi;
1040 bool is_dir = (type == DIR_INODE);
1041 unsigned long ino = 0;
1042
1043 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
1044 get_pages(sbi, is_dir ?
1045 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1046retry:
1047 if (unlikely(f2fs_cp_error(sbi)))
1048 return -EIO;
1049
1050 spin_lock(&sbi->inode_lock[type]);
1051
1052 head = &sbi->inode_list[type];
1053 if (list_empty(head)) {
1054 spin_unlock(&sbi->inode_lock[type]);
1055 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
1056 get_pages(sbi, is_dir ?
1057 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1058 return 0;
1059 }
1060 fi = list_first_entry(head, struct f2fs_inode_info, dirty_list);
1061 inode = igrab(&fi->vfs_inode);
1062 spin_unlock(&sbi->inode_lock[type]);
1063 if (inode) {
1064 unsigned long cur_ino = inode->i_ino;
1065
1066 F2FS_I(inode)->cp_task = current;
1067
1068 filemap_fdatawrite(inode->i_mapping);
1069
1070 F2FS_I(inode)->cp_task = NULL;
1071
1072 iput(inode);
1073 /* We need to give cpu to another writers. */
1074 if (ino == cur_ino)
1075 cond_resched();
1076 else
1077 ino = cur_ino;
1078 } else {
1079 /*
1080 * We should submit bio, since it exists several
1081 * wribacking dentry pages in the freeing inode.
1082 */
1083 f2fs_submit_merged_write(sbi, DATA);
1084 cond_resched();
1085 }
1086 goto retry;
1087}
1088
1089int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
1090{
1091 struct list_head *head = &sbi->inode_list[DIRTY_META];
1092 struct inode *inode;
1093 struct f2fs_inode_info *fi;
1094 s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
1095
1096 while (total--) {
1097 if (unlikely(f2fs_cp_error(sbi)))
1098 return -EIO;
1099
1100 spin_lock(&sbi->inode_lock[DIRTY_META]);
1101 if (list_empty(head)) {
1102 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1103 return 0;
1104 }
1105 fi = list_first_entry(head, struct f2fs_inode_info,
1106 gdirty_list);
1107 inode = igrab(&fi->vfs_inode);
1108 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1109 if (inode) {
1110 sync_inode_metadata(inode, 0);
1111
1112 /* it's on eviction */
1113 if (is_inode_flag_set(inode, FI_DIRTY_INODE))
1114 f2fs_update_inode_page(inode);
1115 iput(inode);
1116 }
1117 }
1118 return 0;
1119}
1120
1121static void __prepare_cp_block(struct f2fs_sb_info *sbi)
1122{
1123 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1124 struct f2fs_nm_info *nm_i = NM_I(sbi);
1125 nid_t last_nid = nm_i->next_scan_nid;
1126
1127 next_free_nid(sbi, &last_nid);
1128 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
1129 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
1130 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
1131 ckpt->next_free_nid = cpu_to_le32(last_nid);
1132}
1133
1134static bool __need_flush_quota(struct f2fs_sb_info *sbi)
1135{
1136 bool ret = false;
1137
1138 if (!is_journalled_quota(sbi))
1139 return false;
1140
1141 down_write(&sbi->quota_sem);
1142 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
1143 ret = false;
1144 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
1145 ret = false;
1146 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
1147 clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1148 ret = true;
1149 } else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
1150 ret = true;
1151 }
1152 up_write(&sbi->quota_sem);
1153 return ret;
1154}
1155
1156/*
1157 * Freeze all the FS-operations for checkpoint.
1158 */
1159static int block_operations(struct f2fs_sb_info *sbi)
1160{
1161 struct writeback_control wbc = {
1162 .sync_mode = WB_SYNC_ALL,
1163 .nr_to_write = LONG_MAX,
1164 .for_reclaim = 0,
1165 };
1166 struct blk_plug plug;
1167 int err = 0, cnt = 0;
1168
1169 blk_start_plug(&plug);
1170
1171retry_flush_quotas:
1172 f2fs_lock_all(sbi);
1173 if (__need_flush_quota(sbi)) {
1174 int locked;
1175
1176 if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
1177 set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1178 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1179 goto retry_flush_dents;
1180 }
1181 f2fs_unlock_all(sbi);
1182
1183 /* only failed during mount/umount/freeze/quotactl */
1184 locked = down_read_trylock(&sbi->sb->s_umount);
1185 f2fs_quota_sync(sbi->sb, -1);
1186 if (locked)
1187 up_read(&sbi->sb->s_umount);
1188 cond_resched();
1189 goto retry_flush_quotas;
1190 }
1191
1192retry_flush_dents:
1193 /* write all the dirty dentry pages */
1194 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
1195 f2fs_unlock_all(sbi);
1196 err = f2fs_sync_dirty_inodes(sbi, DIR_INODE);
1197 if (err)
1198 goto out;
1199 cond_resched();
1200 goto retry_flush_quotas;
1201 }
1202
1203 /*
1204 * POR: we should ensure that there are no dirty node pages
1205 * until finishing nat/sit flush. inode->i_blocks can be updated.
1206 */
1207 down_write(&sbi->node_change);
1208
1209 if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
1210 up_write(&sbi->node_change);
1211 f2fs_unlock_all(sbi);
1212 err = f2fs_sync_inode_meta(sbi);
1213 if (err)
1214 goto out;
1215 cond_resched();
1216 goto retry_flush_quotas;
1217 }
1218
1219retry_flush_nodes:
1220 down_write(&sbi->node_write);
1221
1222 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
1223 up_write(&sbi->node_write);
1224 atomic_inc(&sbi->wb_sync_req[NODE]);
1225 err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO);
1226 atomic_dec(&sbi->wb_sync_req[NODE]);
1227 if (err) {
1228 up_write(&sbi->node_change);
1229 f2fs_unlock_all(sbi);
1230 goto out;
1231 }
1232 cond_resched();
1233 goto retry_flush_nodes;
1234 }
1235
1236 /*
1237 * sbi->node_change is used only for AIO write_begin path which produces
1238 * dirty node blocks and some checkpoint values by block allocation.
1239 */
1240 __prepare_cp_block(sbi);
1241 up_write(&sbi->node_change);
1242out:
1243 blk_finish_plug(&plug);
1244 return err;
1245}
1246
1247static void unblock_operations(struct f2fs_sb_info *sbi)
1248{
1249 up_write(&sbi->node_write);
1250 f2fs_unlock_all(sbi);
1251}
1252
1253void f2fs_wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
1254{
1255 DEFINE_WAIT(wait);
1256
1257 for (;;) {
1258 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
1259
1260 if (!get_pages(sbi, F2FS_WB_CP_DATA))
1261 break;
1262
1263 if (unlikely(f2fs_cp_error(sbi)))
1264 break;
1265
1266 io_schedule_timeout(5*HZ);
1267 }
1268 finish_wait(&sbi->cp_wait, &wait);
1269}
1270
1271static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1272{
1273 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1274 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1275 unsigned long flags;
1276
1277 spin_lock_irqsave(&sbi->cp_lock, flags);
1278
1279 if ((cpc->reason & CP_UMOUNT) &&
1280 le32_to_cpu(ckpt->cp_pack_total_block_count) >
1281 sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
1282 disable_nat_bits(sbi, false);
1283
1284 if (cpc->reason & CP_TRIMMED)
1285 __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1286 else
1287 __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1288
1289 if (cpc->reason & CP_UMOUNT)
1290 __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1291 else
1292 __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1293
1294 if (cpc->reason & CP_FASTBOOT)
1295 __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1296 else
1297 __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1298
1299 if (orphan_num)
1300 __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1301 else
1302 __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1303
1304 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
1305 is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
1306 __set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1307
1308 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
1309 __set_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1310 else
1311 __clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1312
1313 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
1314 __set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1315 else
1316 __clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1317
1318 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
1319 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1320 else
1321 __clear_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1322
1323 if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
1324 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1325
1326 /* set this flag to activate crc|cp_ver for recovery */
1327 __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
1328 __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
1329
1330 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1331}
1332
1333static void commit_checkpoint(struct f2fs_sb_info *sbi,
1334 void *src, block_t blk_addr)
1335{
1336 struct writeback_control wbc = {
1337 .for_reclaim = 0,
1338 };
1339
1340 /*
1341 * pagevec_lookup_tag and lock_page again will take
1342 * some extra time. Therefore, f2fs_update_meta_pages and
1343 * f2fs_sync_meta_pages are combined in this function.
1344 */
1345 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
1346 int err;
1347
1348 f2fs_wait_on_page_writeback(page, META, true, true);
1349
1350 memcpy(page_address(page), src, PAGE_SIZE);
1351
1352 set_page_dirty(page);
1353 if (unlikely(!clear_page_dirty_for_io(page)))
1354 f2fs_bug_on(sbi, 1);
1355
1356 /* writeout cp pack 2 page */
1357 err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO);
1358 if (unlikely(err && f2fs_cp_error(sbi))) {
1359 f2fs_put_page(page, 1);
1360 return;
1361 }
1362
1363 f2fs_bug_on(sbi, err);
1364 f2fs_put_page(page, 0);
1365
1366 /* submit checkpoint (with barrier if NOBARRIER is not set) */
1367 f2fs_submit_merged_write(sbi, META_FLUSH);
1368}
1369
1370static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1371{
1372 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1373 struct f2fs_nm_info *nm_i = NM_I(sbi);
1374 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags;
1375 block_t start_blk;
1376 unsigned int data_sum_blocks, orphan_blocks;
1377 __u32 crc32 = 0;
1378 int i;
1379 int cp_payload_blks = __cp_payload(sbi);
1380 struct super_block *sb = sbi->sb;
1381 struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1382 u64 kbytes_written;
1383 int err;
1384
1385 /* Flush all the NAT/SIT pages */
1386 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1387 f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_META) &&
1388 !f2fs_cp_error(sbi));
1389
1390 /*
1391 * modify checkpoint
1392 * version number is already updated
1393 */
1394 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
1395 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
1396 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1397 ckpt->cur_node_segno[i] =
1398 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
1399 ckpt->cur_node_blkoff[i] =
1400 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
1401 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
1402 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
1403 }
1404 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1405 ckpt->cur_data_segno[i] =
1406 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
1407 ckpt->cur_data_blkoff[i] =
1408 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
1409 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
1410 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
1411 }
1412
1413 /* 2 cp + n data seg summary + orphan inode blocks */
1414 data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false);
1415 spin_lock_irqsave(&sbi->cp_lock, flags);
1416 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
1417 __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1418 else
1419 __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1420 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1421
1422 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
1423 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
1424 orphan_blocks);
1425
1426 if (__remain_node_summaries(cpc->reason))
1427 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
1428 cp_payload_blks + data_sum_blocks +
1429 orphan_blocks + NR_CURSEG_NODE_TYPE);
1430 else
1431 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1432 cp_payload_blks + data_sum_blocks +
1433 orphan_blocks);
1434
1435 /* update ckpt flag for checkpoint */
1436 update_ckpt_flags(sbi, cpc);
1437
1438 /* update SIT/NAT bitmap */
1439 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1440 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1441
1442 crc32 = f2fs_checkpoint_chksum(sbi, ckpt);
1443 *((__le32 *)((unsigned char *)ckpt +
1444 le32_to_cpu(ckpt->checksum_offset)))
1445 = cpu_to_le32(crc32);
1446
1447 start_blk = __start_cp_next_addr(sbi);
1448
1449 /* write nat bits */
1450 if (enabled_nat_bits(sbi, cpc)) {
1451 __u64 cp_ver = cur_cp_version(ckpt);
1452 block_t blk;
1453
1454 cp_ver |= ((__u64)crc32 << 32);
1455 *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver);
1456
1457 blk = start_blk + sbi->blocks_per_seg - nm_i->nat_bits_blocks;
1458 for (i = 0; i < nm_i->nat_bits_blocks; i++)
1459 f2fs_update_meta_page(sbi, nm_i->nat_bits +
1460 (i << F2FS_BLKSIZE_BITS), blk + i);
1461 }
1462
1463 /* write out checkpoint buffer at block 0 */
1464 f2fs_update_meta_page(sbi, ckpt, start_blk++);
1465
1466 for (i = 1; i < 1 + cp_payload_blks; i++)
1467 f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1468 start_blk++);
1469
1470 if (orphan_num) {
1471 write_orphan_inodes(sbi, start_blk);
1472 start_blk += orphan_blocks;
1473 }
1474
1475 f2fs_write_data_summaries(sbi, start_blk);
1476 start_blk += data_sum_blocks;
1477
1478 /* Record write statistics in the hot node summary */
1479 kbytes_written = sbi->kbytes_written;
1480 if (sb->s_bdev->bd_part)
1481 kbytes_written += BD_PART_WRITTEN(sbi);
1482
1483 seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1484
1485 if (__remain_node_summaries(cpc->reason)) {
1486 f2fs_write_node_summaries(sbi, start_blk);
1487 start_blk += NR_CURSEG_NODE_TYPE;
1488 }
1489
1490 /* update user_block_counts */
1491 sbi->last_valid_block_count = sbi->total_valid_block_count;
1492 percpu_counter_set(&sbi->alloc_valid_block_count, 0);
1493
1494 /* Here, we have one bio having CP pack except cp pack 2 page */
1495 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1496 f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_META) &&
1497 !f2fs_cp_error(sbi));
1498
1499 /* wait for previous submitted meta pages writeback */
1500 f2fs_wait_on_all_pages_writeback(sbi);
1501
1502 /* flush all device cache */
1503 err = f2fs_flush_device_cache(sbi);
1504 if (err)
1505 return err;
1506
1507 /* barrier and flush checkpoint cp pack 2 page if it can */
1508 commit_checkpoint(sbi, ckpt, start_blk);
1509 f2fs_wait_on_all_pages_writeback(sbi);
1510
1511 /*
1512 * invalidate intermediate page cache borrowed from meta inode
1513 * which are used for migration of encrypted inode's blocks.
1514 */
1515 if (f2fs_sb_has_encrypt(sbi))
1516 invalidate_mapping_pages(META_MAPPING(sbi),
1517 MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1);
1518
1519 f2fs_release_ino_entry(sbi, false);
1520
1521 f2fs_reset_fsync_node_info(sbi);
1522
1523 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1524 clear_sbi_flag(sbi, SBI_NEED_CP);
1525 clear_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1526
1527 spin_lock(&sbi->stat_lock);
1528 sbi->unusable_block_count = 0;
1529 spin_unlock(&sbi->stat_lock);
1530
1531 __set_cp_next_pack(sbi);
1532
1533 /*
1534 * redirty superblock if metadata like node page or inode cache is
1535 * updated during writing checkpoint.
1536 */
1537 if (get_pages(sbi, F2FS_DIRTY_NODES) ||
1538 get_pages(sbi, F2FS_DIRTY_IMETA))
1539 set_sbi_flag(sbi, SBI_IS_DIRTY);
1540
1541 f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
1542
1543 return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
1544}
1545
1546/*
1547 * We guarantee that this checkpoint procedure will not fail.
1548 */
1549int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1550{
1551 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1552 unsigned long long ckpt_ver;
1553 int err = 0;
1554
1555 if (f2fs_readonly(sbi->sb) || f2fs_hw_is_readonly(sbi))
1556 return -EROFS;
1557
1558 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1559 if (cpc->reason != CP_PAUSE)
1560 return 0;
1561 f2fs_warn(sbi, "Start checkpoint disabled!");
1562 }
1563 mutex_lock(&sbi->cp_mutex);
1564
1565 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1566 ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
1567 ((cpc->reason & CP_DISCARD) && !sbi->discard_blks)))
1568 goto out;
1569 if (unlikely(f2fs_cp_error(sbi))) {
1570 err = -EIO;
1571 goto out;
1572 }
1573
1574 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1575
1576 err = block_operations(sbi);
1577 if (err)
1578 goto out;
1579
1580 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1581
1582 f2fs_flush_merged_writes(sbi);
1583
1584 /* this is the case of multiple fstrims without any changes */
1585 if (cpc->reason & CP_DISCARD) {
1586 if (!f2fs_exist_trim_candidates(sbi, cpc)) {
1587 unblock_operations(sbi);
1588 goto out;
1589 }
1590
1591 if (NM_I(sbi)->dirty_nat_cnt == 0 &&
1592 SIT_I(sbi)->dirty_sentries == 0 &&
1593 prefree_segments(sbi) == 0) {
1594 f2fs_flush_sit_entries(sbi, cpc);
1595 f2fs_clear_prefree_segments(sbi, cpc);
1596 unblock_operations(sbi);
1597 goto out;
1598 }
1599 }
1600
1601 /*
1602 * update checkpoint pack index
1603 * Increase the version number so that
1604 * SIT entries and seg summaries are written at correct place
1605 */
1606 ckpt_ver = cur_cp_version(ckpt);
1607 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1608
1609 /* write cached NAT/SIT entries to NAT/SIT area */
1610 err = f2fs_flush_nat_entries(sbi, cpc);
1611 if (err)
1612 goto stop;
1613
1614 f2fs_flush_sit_entries(sbi, cpc);
1615
1616 /* unlock all the fs_lock[] in do_checkpoint() */
1617 err = do_checkpoint(sbi, cpc);
1618 if (err)
1619 f2fs_release_discard_addrs(sbi);
1620 else
1621 f2fs_clear_prefree_segments(sbi, cpc);
1622stop:
1623 unblock_operations(sbi);
1624 stat_inc_cp_count(sbi->stat_info);
1625
1626 if (cpc->reason & CP_RECOVERY)
1627 f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
1628
1629 /* do checkpoint periodically */
1630 f2fs_update_time(sbi, CP_TIME);
1631 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1632out:
1633 mutex_unlock(&sbi->cp_mutex);
1634 return err;
1635}
1636
1637void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi)
1638{
1639 int i;
1640
1641 for (i = 0; i < MAX_INO_ENTRY; i++) {
1642 struct inode_management *im = &sbi->im[i];
1643
1644 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1645 spin_lock_init(&im->ino_lock);
1646 INIT_LIST_HEAD(&im->ino_list);
1647 im->ino_num = 0;
1648 }
1649
1650 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1651 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1652 F2FS_ORPHANS_PER_BLOCK;
1653}
1654
1655int __init f2fs_create_checkpoint_caches(void)
1656{
1657 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1658 sizeof(struct ino_entry));
1659 if (!ino_entry_slab)
1660 return -ENOMEM;
1661 f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1662 sizeof(struct inode_entry));
1663 if (!f2fs_inode_entry_slab) {
1664 kmem_cache_destroy(ino_entry_slab);
1665 return -ENOMEM;
1666 }
1667 return 0;
1668}
1669
1670void f2fs_destroy_checkpoint_caches(void)
1671{
1672 kmem_cache_destroy(ino_entry_slab);
1673 kmem_cache_destroy(f2fs_inode_entry_slab);
1674}