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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
29void f2fs_stop_checkpoint(struct f2fs_sb_info *sbi, bool end_io)
30{
31 set_ckpt_flags(sbi, CP_ERROR_FLAG);
32 sbi->sb->s_flags |= MS_RDONLY;
33 if (!end_io)
34 f2fs_flush_merged_bios(sbi);
35}
36
37/*
38 * We guarantee no failure on the returned page.
39 */
40struct page *grab_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
41{
42 struct address_space *mapping = META_MAPPING(sbi);
43 struct page *page = NULL;
44repeat:
45 page = f2fs_grab_cache_page(mapping, index, false);
46 if (!page) {
47 cond_resched();
48 goto repeat;
49 }
50 f2fs_wait_on_page_writeback(page, META, true);
51 if (!PageUptodate(page))
52 SetPageUptodate(page);
53 return page;
54}
55
56/*
57 * We guarantee no failure on the returned page.
58 */
59static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
60 bool is_meta)
61{
62 struct address_space *mapping = META_MAPPING(sbi);
63 struct page *page;
64 struct f2fs_io_info fio = {
65 .sbi = sbi,
66 .type = META,
67 .op = REQ_OP_READ,
68 .op_flags = REQ_META | REQ_PRIO,
69 .old_blkaddr = index,
70 .new_blkaddr = index,
71 .encrypted_page = NULL,
72 };
73
74 if (unlikely(!is_meta))
75 fio.op_flags &= ~REQ_META;
76repeat:
77 page = f2fs_grab_cache_page(mapping, index, false);
78 if (!page) {
79 cond_resched();
80 goto repeat;
81 }
82 if (PageUptodate(page))
83 goto out;
84
85 fio.page = page;
86
87 if (f2fs_submit_page_bio(&fio)) {
88 f2fs_put_page(page, 1);
89 goto repeat;
90 }
91
92 lock_page(page);
93 if (unlikely(page->mapping != mapping)) {
94 f2fs_put_page(page, 1);
95 goto repeat;
96 }
97
98 /*
99 * if there is any IO error when accessing device, make our filesystem
100 * readonly and make sure do not write checkpoint with non-uptodate
101 * meta page.
102 */
103 if (unlikely(!PageUptodate(page)))
104 f2fs_stop_checkpoint(sbi, false);
105out:
106 return page;
107}
108
109struct page *get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
110{
111 return __get_meta_page(sbi, index, true);
112}
113
114/* for POR only */
115struct page *get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
116{
117 return __get_meta_page(sbi, index, false);
118}
119
120bool is_valid_blkaddr(struct f2fs_sb_info *sbi, block_t blkaddr, int type)
121{
122 switch (type) {
123 case META_NAT:
124 break;
125 case META_SIT:
126 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
127 return false;
128 break;
129 case META_SSA:
130 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
131 blkaddr < SM_I(sbi)->ssa_blkaddr))
132 return false;
133 break;
134 case META_CP:
135 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
136 blkaddr < __start_cp_addr(sbi)))
137 return false;
138 break;
139 case META_POR:
140 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
141 blkaddr < MAIN_BLKADDR(sbi)))
142 return false;
143 break;
144 default:
145 BUG();
146 }
147
148 return true;
149}
150
151/*
152 * Readahead CP/NAT/SIT/SSA pages
153 */
154int ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
155 int type, bool sync)
156{
157 struct page *page;
158 block_t blkno = start;
159 struct f2fs_io_info fio = {
160 .sbi = sbi,
161 .type = META,
162 .op = REQ_OP_READ,
163 .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
164 .encrypted_page = NULL,
165 };
166 struct blk_plug plug;
167
168 if (unlikely(type == META_POR))
169 fio.op_flags &= ~REQ_META;
170
171 blk_start_plug(&plug);
172 for (; nrpages-- > 0; blkno++) {
173
174 if (!is_valid_blkaddr(sbi, blkno, type))
175 goto out;
176
177 switch (type) {
178 case META_NAT:
179 if (unlikely(blkno >=
180 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
181 blkno = 0;
182 /* get nat block addr */
183 fio.new_blkaddr = current_nat_addr(sbi,
184 blkno * NAT_ENTRY_PER_BLOCK);
185 break;
186 case META_SIT:
187 /* get sit block addr */
188 fio.new_blkaddr = current_sit_addr(sbi,
189 blkno * SIT_ENTRY_PER_BLOCK);
190 break;
191 case META_SSA:
192 case META_CP:
193 case META_POR:
194 fio.new_blkaddr = blkno;
195 break;
196 default:
197 BUG();
198 }
199
200 page = f2fs_grab_cache_page(META_MAPPING(sbi),
201 fio.new_blkaddr, false);
202 if (!page)
203 continue;
204 if (PageUptodate(page)) {
205 f2fs_put_page(page, 1);
206 continue;
207 }
208
209 fio.page = page;
210 fio.old_blkaddr = fio.new_blkaddr;
211 f2fs_submit_page_mbio(&fio);
212 f2fs_put_page(page, 0);
213 }
214out:
215 f2fs_submit_merged_bio(sbi, META, READ);
216 blk_finish_plug(&plug);
217 return blkno - start;
218}
219
220void ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
221{
222 struct page *page;
223 bool readahead = false;
224
225 page = find_get_page(META_MAPPING(sbi), index);
226 if (!page || !PageUptodate(page))
227 readahead = true;
228 f2fs_put_page(page, 0);
229
230 if (readahead)
231 ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
232}
233
234static int f2fs_write_meta_page(struct page *page,
235 struct writeback_control *wbc)
236{
237 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
238
239 trace_f2fs_writepage(page, META);
240
241 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
242 goto redirty_out;
243 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
244 goto redirty_out;
245 if (unlikely(f2fs_cp_error(sbi)))
246 goto redirty_out;
247
248 write_meta_page(sbi, page);
249 dec_page_count(sbi, F2FS_DIRTY_META);
250
251 if (wbc->for_reclaim)
252 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, META, WRITE);
253
254 unlock_page(page);
255
256 if (unlikely(f2fs_cp_error(sbi)))
257 f2fs_submit_merged_bio(sbi, META, WRITE);
258
259 return 0;
260
261redirty_out:
262 redirty_page_for_writepage(wbc, page);
263 return AOP_WRITEPAGE_ACTIVATE;
264}
265
266static int f2fs_write_meta_pages(struct address_space *mapping,
267 struct writeback_control *wbc)
268{
269 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
270 long diff, written;
271
272 /* collect a number of dirty meta pages and write together */
273 if (wbc->for_kupdate ||
274 get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
275 goto skip_write;
276
277 trace_f2fs_writepages(mapping->host, wbc, META);
278
279 /* if mounting is failed, skip writing node pages */
280 mutex_lock(&sbi->cp_mutex);
281 diff = nr_pages_to_write(sbi, META, wbc);
282 written = sync_meta_pages(sbi, META, wbc->nr_to_write);
283 mutex_unlock(&sbi->cp_mutex);
284 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
285 return 0;
286
287skip_write:
288 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
289 trace_f2fs_writepages(mapping->host, wbc, META);
290 return 0;
291}
292
293long sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
294 long nr_to_write)
295{
296 struct address_space *mapping = META_MAPPING(sbi);
297 pgoff_t index = 0, end = ULONG_MAX, prev = ULONG_MAX;
298 struct pagevec pvec;
299 long nwritten = 0;
300 struct writeback_control wbc = {
301 .for_reclaim = 0,
302 };
303 struct blk_plug plug;
304
305 pagevec_init(&pvec, 0);
306
307 blk_start_plug(&plug);
308
309 while (index <= end) {
310 int i, nr_pages;
311 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
312 PAGECACHE_TAG_DIRTY,
313 min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1);
314 if (unlikely(nr_pages == 0))
315 break;
316
317 for (i = 0; i < nr_pages; i++) {
318 struct page *page = pvec.pages[i];
319
320 if (prev == ULONG_MAX)
321 prev = page->index - 1;
322 if (nr_to_write != LONG_MAX && page->index != prev + 1) {
323 pagevec_release(&pvec);
324 goto stop;
325 }
326
327 lock_page(page);
328
329 if (unlikely(page->mapping != mapping)) {
330continue_unlock:
331 unlock_page(page);
332 continue;
333 }
334 if (!PageDirty(page)) {
335 /* someone wrote it for us */
336 goto continue_unlock;
337 }
338
339 f2fs_wait_on_page_writeback(page, META, true);
340
341 BUG_ON(PageWriteback(page));
342 if (!clear_page_dirty_for_io(page))
343 goto continue_unlock;
344
345 if (mapping->a_ops->writepage(page, &wbc)) {
346 unlock_page(page);
347 break;
348 }
349 nwritten++;
350 prev = page->index;
351 if (unlikely(nwritten >= nr_to_write))
352 break;
353 }
354 pagevec_release(&pvec);
355 cond_resched();
356 }
357stop:
358 if (nwritten)
359 f2fs_submit_merged_bio(sbi, type, WRITE);
360
361 blk_finish_plug(&plug);
362
363 return nwritten;
364}
365
366static int f2fs_set_meta_page_dirty(struct page *page)
367{
368 trace_f2fs_set_page_dirty(page, META);
369
370 if (!PageUptodate(page))
371 SetPageUptodate(page);
372 if (!PageDirty(page)) {
373 f2fs_set_page_dirty_nobuffers(page);
374 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
375 SetPagePrivate(page);
376 f2fs_trace_pid(page);
377 return 1;
378 }
379 return 0;
380}
381
382const struct address_space_operations f2fs_meta_aops = {
383 .writepage = f2fs_write_meta_page,
384 .writepages = f2fs_write_meta_pages,
385 .set_page_dirty = f2fs_set_meta_page_dirty,
386 .invalidatepage = f2fs_invalidate_page,
387 .releasepage = f2fs_release_page,
388#ifdef CONFIG_MIGRATION
389 .migratepage = f2fs_migrate_page,
390#endif
391};
392
393static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
394{
395 struct inode_management *im = &sbi->im[type];
396 struct ino_entry *e, *tmp;
397
398 tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
399retry:
400 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
401
402 spin_lock(&im->ino_lock);
403 e = radix_tree_lookup(&im->ino_root, ino);
404 if (!e) {
405 e = tmp;
406 if (radix_tree_insert(&im->ino_root, ino, e)) {
407 spin_unlock(&im->ino_lock);
408 radix_tree_preload_end();
409 goto retry;
410 }
411 memset(e, 0, sizeof(struct ino_entry));
412 e->ino = ino;
413
414 list_add_tail(&e->list, &im->ino_list);
415 if (type != ORPHAN_INO)
416 im->ino_num++;
417 }
418 spin_unlock(&im->ino_lock);
419 radix_tree_preload_end();
420
421 if (e != tmp)
422 kmem_cache_free(ino_entry_slab, tmp);
423}
424
425static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
426{
427 struct inode_management *im = &sbi->im[type];
428 struct ino_entry *e;
429
430 spin_lock(&im->ino_lock);
431 e = radix_tree_lookup(&im->ino_root, ino);
432 if (e) {
433 list_del(&e->list);
434 radix_tree_delete(&im->ino_root, ino);
435 im->ino_num--;
436 spin_unlock(&im->ino_lock);
437 kmem_cache_free(ino_entry_slab, e);
438 return;
439 }
440 spin_unlock(&im->ino_lock);
441}
442
443void add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
444{
445 /* add new dirty ino entry into list */
446 __add_ino_entry(sbi, ino, type);
447}
448
449void remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
450{
451 /* remove dirty ino entry from list */
452 __remove_ino_entry(sbi, ino, type);
453}
454
455/* mode should be APPEND_INO or UPDATE_INO */
456bool exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
457{
458 struct inode_management *im = &sbi->im[mode];
459 struct ino_entry *e;
460
461 spin_lock(&im->ino_lock);
462 e = radix_tree_lookup(&im->ino_root, ino);
463 spin_unlock(&im->ino_lock);
464 return e ? true : false;
465}
466
467void release_ino_entry(struct f2fs_sb_info *sbi, bool all)
468{
469 struct ino_entry *e, *tmp;
470 int i;
471
472 for (i = all ? ORPHAN_INO: APPEND_INO; i <= UPDATE_INO; i++) {
473 struct inode_management *im = &sbi->im[i];
474
475 spin_lock(&im->ino_lock);
476 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
477 list_del(&e->list);
478 radix_tree_delete(&im->ino_root, e->ino);
479 kmem_cache_free(ino_entry_slab, e);
480 im->ino_num--;
481 }
482 spin_unlock(&im->ino_lock);
483 }
484}
485
486int acquire_orphan_inode(struct f2fs_sb_info *sbi)
487{
488 struct inode_management *im = &sbi->im[ORPHAN_INO];
489 int err = 0;
490
491 spin_lock(&im->ino_lock);
492
493#ifdef CONFIG_F2FS_FAULT_INJECTION
494 if (time_to_inject(sbi, FAULT_ORPHAN)) {
495 spin_unlock(&im->ino_lock);
496 return -ENOSPC;
497 }
498#endif
499 if (unlikely(im->ino_num >= sbi->max_orphans))
500 err = -ENOSPC;
501 else
502 im->ino_num++;
503 spin_unlock(&im->ino_lock);
504
505 return err;
506}
507
508void release_orphan_inode(struct f2fs_sb_info *sbi)
509{
510 struct inode_management *im = &sbi->im[ORPHAN_INO];
511
512 spin_lock(&im->ino_lock);
513 f2fs_bug_on(sbi, im->ino_num == 0);
514 im->ino_num--;
515 spin_unlock(&im->ino_lock);
516}
517
518void add_orphan_inode(struct inode *inode)
519{
520 /* add new orphan ino entry into list */
521 __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, ORPHAN_INO);
522 update_inode_page(inode);
523}
524
525void remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
526{
527 /* remove orphan entry from orphan list */
528 __remove_ino_entry(sbi, ino, ORPHAN_INO);
529}
530
531static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
532{
533 struct inode *inode;
534 struct node_info ni;
535 int err = acquire_orphan_inode(sbi);
536
537 if (err) {
538 set_sbi_flag(sbi, SBI_NEED_FSCK);
539 f2fs_msg(sbi->sb, KERN_WARNING,
540 "%s: orphan failed (ino=%x), run fsck to fix.",
541 __func__, ino);
542 return err;
543 }
544
545 __add_ino_entry(sbi, ino, ORPHAN_INO);
546
547 inode = f2fs_iget_retry(sbi->sb, ino);
548 if (IS_ERR(inode)) {
549 /*
550 * there should be a bug that we can't find the entry
551 * to orphan inode.
552 */
553 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
554 return PTR_ERR(inode);
555 }
556
557 clear_nlink(inode);
558
559 /* truncate all the data during iput */
560 iput(inode);
561
562 get_node_info(sbi, ino, &ni);
563
564 /* ENOMEM was fully retried in f2fs_evict_inode. */
565 if (ni.blk_addr != NULL_ADDR) {
566 set_sbi_flag(sbi, SBI_NEED_FSCK);
567 f2fs_msg(sbi->sb, KERN_WARNING,
568 "%s: orphan failed (ino=%x), run fsck to fix.",
569 __func__, ino);
570 return -EIO;
571 }
572 __remove_ino_entry(sbi, ino, ORPHAN_INO);
573 return 0;
574}
575
576int recover_orphan_inodes(struct f2fs_sb_info *sbi)
577{
578 block_t start_blk, orphan_blocks, i, j;
579 int err;
580
581 if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
582 return 0;
583
584 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
585 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
586
587 ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
588
589 for (i = 0; i < orphan_blocks; i++) {
590 struct page *page = get_meta_page(sbi, start_blk + i);
591 struct f2fs_orphan_block *orphan_blk;
592
593 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
594 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
595 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
596 err = recover_orphan_inode(sbi, ino);
597 if (err) {
598 f2fs_put_page(page, 1);
599 return err;
600 }
601 }
602 f2fs_put_page(page, 1);
603 }
604 /* clear Orphan Flag */
605 clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
606 return 0;
607}
608
609static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
610{
611 struct list_head *head;
612 struct f2fs_orphan_block *orphan_blk = NULL;
613 unsigned int nentries = 0;
614 unsigned short index = 1;
615 unsigned short orphan_blocks;
616 struct page *page = NULL;
617 struct ino_entry *orphan = NULL;
618 struct inode_management *im = &sbi->im[ORPHAN_INO];
619
620 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
621
622 /*
623 * we don't need to do spin_lock(&im->ino_lock) here, since all the
624 * orphan inode operations are covered under f2fs_lock_op().
625 * And, spin_lock should be avoided due to page operations below.
626 */
627 head = &im->ino_list;
628
629 /* loop for each orphan inode entry and write them in Jornal block */
630 list_for_each_entry(orphan, head, list) {
631 if (!page) {
632 page = grab_meta_page(sbi, start_blk++);
633 orphan_blk =
634 (struct f2fs_orphan_block *)page_address(page);
635 memset(orphan_blk, 0, sizeof(*orphan_blk));
636 }
637
638 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
639
640 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
641 /*
642 * an orphan block is full of 1020 entries,
643 * then we need to flush current orphan blocks
644 * and bring another one in memory
645 */
646 orphan_blk->blk_addr = cpu_to_le16(index);
647 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
648 orphan_blk->entry_count = cpu_to_le32(nentries);
649 set_page_dirty(page);
650 f2fs_put_page(page, 1);
651 index++;
652 nentries = 0;
653 page = NULL;
654 }
655 }
656
657 if (page) {
658 orphan_blk->blk_addr = cpu_to_le16(index);
659 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
660 orphan_blk->entry_count = cpu_to_le32(nentries);
661 set_page_dirty(page);
662 f2fs_put_page(page, 1);
663 }
664}
665
666static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
667 struct f2fs_checkpoint **cp_block, struct page **cp_page,
668 unsigned long long *version)
669{
670 unsigned long blk_size = sbi->blocksize;
671 size_t crc_offset = 0;
672 __u32 crc = 0;
673
674 *cp_page = get_meta_page(sbi, cp_addr);
675 *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
676
677 crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
678 if (crc_offset >= blk_size) {
679 f2fs_msg(sbi->sb, KERN_WARNING,
680 "invalid crc_offset: %zu", crc_offset);
681 return -EINVAL;
682 }
683
684 crc = le32_to_cpu(*((__le32 *)((unsigned char *)*cp_block
685 + crc_offset)));
686 if (!f2fs_crc_valid(sbi, crc, *cp_block, crc_offset)) {
687 f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc value");
688 return -EINVAL;
689 }
690
691 *version = cur_cp_version(*cp_block);
692 return 0;
693}
694
695static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
696 block_t cp_addr, unsigned long long *version)
697{
698 struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
699 struct f2fs_checkpoint *cp_block = NULL;
700 unsigned long long cur_version = 0, pre_version = 0;
701 int err;
702
703 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
704 &cp_page_1, version);
705 if (err)
706 goto invalid_cp1;
707 pre_version = *version;
708
709 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
710 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
711 &cp_page_2, version);
712 if (err)
713 goto invalid_cp2;
714 cur_version = *version;
715
716 if (cur_version == pre_version) {
717 *version = cur_version;
718 f2fs_put_page(cp_page_2, 1);
719 return cp_page_1;
720 }
721invalid_cp2:
722 f2fs_put_page(cp_page_2, 1);
723invalid_cp1:
724 f2fs_put_page(cp_page_1, 1);
725 return NULL;
726}
727
728int get_valid_checkpoint(struct f2fs_sb_info *sbi)
729{
730 struct f2fs_checkpoint *cp_block;
731 struct f2fs_super_block *fsb = sbi->raw_super;
732 struct page *cp1, *cp2, *cur_page;
733 unsigned long blk_size = sbi->blocksize;
734 unsigned long long cp1_version = 0, cp2_version = 0;
735 unsigned long long cp_start_blk_no;
736 unsigned int cp_blks = 1 + __cp_payload(sbi);
737 block_t cp_blk_no;
738 int i;
739
740 sbi->ckpt = kzalloc(cp_blks * blk_size, GFP_KERNEL);
741 if (!sbi->ckpt)
742 return -ENOMEM;
743 /*
744 * Finding out valid cp block involves read both
745 * sets( cp pack1 and cp pack 2)
746 */
747 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
748 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
749
750 /* The second checkpoint pack should start at the next segment */
751 cp_start_blk_no += ((unsigned long long)1) <<
752 le32_to_cpu(fsb->log_blocks_per_seg);
753 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
754
755 if (cp1 && cp2) {
756 if (ver_after(cp2_version, cp1_version))
757 cur_page = cp2;
758 else
759 cur_page = cp1;
760 } else if (cp1) {
761 cur_page = cp1;
762 } else if (cp2) {
763 cur_page = cp2;
764 } else {
765 goto fail_no_cp;
766 }
767
768 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
769 memcpy(sbi->ckpt, cp_block, blk_size);
770
771 /* Sanity checking of checkpoint */
772 if (sanity_check_ckpt(sbi))
773 goto free_fail_no_cp;
774
775 if (cur_page == cp1)
776 sbi->cur_cp_pack = 1;
777 else
778 sbi->cur_cp_pack = 2;
779
780 if (cp_blks <= 1)
781 goto done;
782
783 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
784 if (cur_page == cp2)
785 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
786
787 for (i = 1; i < cp_blks; i++) {
788 void *sit_bitmap_ptr;
789 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
790
791 cur_page = get_meta_page(sbi, cp_blk_no + i);
792 sit_bitmap_ptr = page_address(cur_page);
793 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
794 f2fs_put_page(cur_page, 1);
795 }
796done:
797 f2fs_put_page(cp1, 1);
798 f2fs_put_page(cp2, 1);
799 return 0;
800
801free_fail_no_cp:
802 f2fs_put_page(cp1, 1);
803 f2fs_put_page(cp2, 1);
804fail_no_cp:
805 kfree(sbi->ckpt);
806 return -EINVAL;
807}
808
809static void __add_dirty_inode(struct inode *inode, enum inode_type type)
810{
811 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
812 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
813
814 if (is_inode_flag_set(inode, flag))
815 return;
816
817 set_inode_flag(inode, flag);
818 list_add_tail(&F2FS_I(inode)->dirty_list, &sbi->inode_list[type]);
819 stat_inc_dirty_inode(sbi, type);
820}
821
822static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
823{
824 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
825
826 if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
827 return;
828
829 list_del_init(&F2FS_I(inode)->dirty_list);
830 clear_inode_flag(inode, flag);
831 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
832}
833
834void update_dirty_page(struct inode *inode, struct page *page)
835{
836 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
837 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
838
839 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
840 !S_ISLNK(inode->i_mode))
841 return;
842
843 spin_lock(&sbi->inode_lock[type]);
844 if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
845 __add_dirty_inode(inode, type);
846 inode_inc_dirty_pages(inode);
847 spin_unlock(&sbi->inode_lock[type]);
848
849 SetPagePrivate(page);
850 f2fs_trace_pid(page);
851}
852
853void remove_dirty_inode(struct inode *inode)
854{
855 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
856 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
857
858 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
859 !S_ISLNK(inode->i_mode))
860 return;
861
862 if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
863 return;
864
865 spin_lock(&sbi->inode_lock[type]);
866 __remove_dirty_inode(inode, type);
867 spin_unlock(&sbi->inode_lock[type]);
868}
869
870int sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
871{
872 struct list_head *head;
873 struct inode *inode;
874 struct f2fs_inode_info *fi;
875 bool is_dir = (type == DIR_INODE);
876
877 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
878 get_pages(sbi, is_dir ?
879 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
880retry:
881 if (unlikely(f2fs_cp_error(sbi)))
882 return -EIO;
883
884 spin_lock(&sbi->inode_lock[type]);
885
886 head = &sbi->inode_list[type];
887 if (list_empty(head)) {
888 spin_unlock(&sbi->inode_lock[type]);
889 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
890 get_pages(sbi, is_dir ?
891 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
892 return 0;
893 }
894 fi = list_entry(head->next, struct f2fs_inode_info, dirty_list);
895 inode = igrab(&fi->vfs_inode);
896 spin_unlock(&sbi->inode_lock[type]);
897 if (inode) {
898 filemap_fdatawrite(inode->i_mapping);
899 iput(inode);
900 } else {
901 /*
902 * We should submit bio, since it exists several
903 * wribacking dentry pages in the freeing inode.
904 */
905 f2fs_submit_merged_bio(sbi, DATA, WRITE);
906 cond_resched();
907 }
908 goto retry;
909}
910
911int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
912{
913 struct list_head *head = &sbi->inode_list[DIRTY_META];
914 struct inode *inode;
915 struct f2fs_inode_info *fi;
916 s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
917
918 while (total--) {
919 if (unlikely(f2fs_cp_error(sbi)))
920 return -EIO;
921
922 spin_lock(&sbi->inode_lock[DIRTY_META]);
923 if (list_empty(head)) {
924 spin_unlock(&sbi->inode_lock[DIRTY_META]);
925 return 0;
926 }
927 fi = list_entry(head->next, struct f2fs_inode_info,
928 gdirty_list);
929 inode = igrab(&fi->vfs_inode);
930 spin_unlock(&sbi->inode_lock[DIRTY_META]);
931 if (inode) {
932 sync_inode_metadata(inode, 0);
933
934 /* it's on eviction */
935 if (is_inode_flag_set(inode, FI_DIRTY_INODE))
936 update_inode_page(inode);
937 iput(inode);
938 }
939 };
940 return 0;
941}
942
943/*
944 * Freeze all the FS-operations for checkpoint.
945 */
946static int block_operations(struct f2fs_sb_info *sbi)
947{
948 struct writeback_control wbc = {
949 .sync_mode = WB_SYNC_ALL,
950 .nr_to_write = LONG_MAX,
951 .for_reclaim = 0,
952 };
953 struct blk_plug plug;
954 int err = 0;
955
956 blk_start_plug(&plug);
957
958retry_flush_dents:
959 f2fs_lock_all(sbi);
960 /* write all the dirty dentry pages */
961 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
962 f2fs_unlock_all(sbi);
963 err = sync_dirty_inodes(sbi, DIR_INODE);
964 if (err)
965 goto out;
966 goto retry_flush_dents;
967 }
968
969 if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
970 f2fs_unlock_all(sbi);
971 err = f2fs_sync_inode_meta(sbi);
972 if (err)
973 goto out;
974 goto retry_flush_dents;
975 }
976
977 /*
978 * POR: we should ensure that there are no dirty node pages
979 * until finishing nat/sit flush.
980 */
981retry_flush_nodes:
982 down_write(&sbi->node_write);
983
984 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
985 up_write(&sbi->node_write);
986 err = sync_node_pages(sbi, &wbc);
987 if (err) {
988 f2fs_unlock_all(sbi);
989 goto out;
990 }
991 goto retry_flush_nodes;
992 }
993out:
994 blk_finish_plug(&plug);
995 return err;
996}
997
998static void unblock_operations(struct f2fs_sb_info *sbi)
999{
1000 up_write(&sbi->node_write);
1001
1002 build_free_nids(sbi, false);
1003 f2fs_unlock_all(sbi);
1004}
1005
1006static void wait_on_all_pages_writeback(struct f2fs_sb_info *sbi)
1007{
1008 DEFINE_WAIT(wait);
1009
1010 for (;;) {
1011 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
1012
1013 if (!get_pages(sbi, F2FS_WB_CP_DATA))
1014 break;
1015
1016 io_schedule_timeout(5*HZ);
1017 }
1018 finish_wait(&sbi->cp_wait, &wait);
1019}
1020
1021static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1022{
1023 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1024 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1025
1026 spin_lock(&sbi->cp_lock);
1027
1028 if (cpc->reason == CP_UMOUNT)
1029 __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1030 else
1031 __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1032
1033 if (cpc->reason == CP_FASTBOOT)
1034 __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1035 else
1036 __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1037
1038 if (orphan_num)
1039 __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1040 else
1041 __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1042
1043 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1044 __set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1045
1046 /* set this flag to activate crc|cp_ver for recovery */
1047 __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
1048
1049 spin_unlock(&sbi->cp_lock);
1050}
1051
1052static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1053{
1054 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1055 struct f2fs_nm_info *nm_i = NM_I(sbi);
1056 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1057 nid_t last_nid = nm_i->next_scan_nid;
1058 block_t start_blk;
1059 unsigned int data_sum_blocks, orphan_blocks;
1060 __u32 crc32 = 0;
1061 int i;
1062 int cp_payload_blks = __cp_payload(sbi);
1063 struct super_block *sb = sbi->sb;
1064 struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1065 u64 kbytes_written;
1066
1067 /* Flush all the NAT/SIT pages */
1068 while (get_pages(sbi, F2FS_DIRTY_META)) {
1069 sync_meta_pages(sbi, META, LONG_MAX);
1070 if (unlikely(f2fs_cp_error(sbi)))
1071 return -EIO;
1072 }
1073
1074 next_free_nid(sbi, &last_nid);
1075
1076 /*
1077 * modify checkpoint
1078 * version number is already updated
1079 */
1080 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi));
1081 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
1082 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
1083 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1084 ckpt->cur_node_segno[i] =
1085 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
1086 ckpt->cur_node_blkoff[i] =
1087 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
1088 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
1089 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
1090 }
1091 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1092 ckpt->cur_data_segno[i] =
1093 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
1094 ckpt->cur_data_blkoff[i] =
1095 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
1096 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
1097 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
1098 }
1099
1100 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
1101 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
1102 ckpt->next_free_nid = cpu_to_le32(last_nid);
1103
1104 /* 2 cp + n data seg summary + orphan inode blocks */
1105 data_sum_blocks = npages_for_summary_flush(sbi, false);
1106 spin_lock(&sbi->cp_lock);
1107 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
1108 __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1109 else
1110 __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1111 spin_unlock(&sbi->cp_lock);
1112
1113 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
1114 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
1115 orphan_blocks);
1116
1117 if (__remain_node_summaries(cpc->reason))
1118 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
1119 cp_payload_blks + data_sum_blocks +
1120 orphan_blocks + NR_CURSEG_NODE_TYPE);
1121 else
1122 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1123 cp_payload_blks + data_sum_blocks +
1124 orphan_blocks);
1125
1126 /* update ckpt flag for checkpoint */
1127 update_ckpt_flags(sbi, cpc);
1128
1129 /* update SIT/NAT bitmap */
1130 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1131 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1132
1133 crc32 = f2fs_crc32(sbi, ckpt, le32_to_cpu(ckpt->checksum_offset));
1134 *((__le32 *)((unsigned char *)ckpt +
1135 le32_to_cpu(ckpt->checksum_offset)))
1136 = cpu_to_le32(crc32);
1137
1138 start_blk = __start_cp_next_addr(sbi);
1139
1140 /* need to wait for end_io results */
1141 wait_on_all_pages_writeback(sbi);
1142 if (unlikely(f2fs_cp_error(sbi)))
1143 return -EIO;
1144
1145 /* write out checkpoint buffer at block 0 */
1146 update_meta_page(sbi, ckpt, start_blk++);
1147
1148 for (i = 1; i < 1 + cp_payload_blks; i++)
1149 update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1150 start_blk++);
1151
1152 if (orphan_num) {
1153 write_orphan_inodes(sbi, start_blk);
1154 start_blk += orphan_blocks;
1155 }
1156
1157 write_data_summaries(sbi, start_blk);
1158 start_blk += data_sum_blocks;
1159
1160 /* Record write statistics in the hot node summary */
1161 kbytes_written = sbi->kbytes_written;
1162 if (sb->s_bdev->bd_part)
1163 kbytes_written += BD_PART_WRITTEN(sbi);
1164
1165 seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1166
1167 if (__remain_node_summaries(cpc->reason)) {
1168 write_node_summaries(sbi, start_blk);
1169 start_blk += NR_CURSEG_NODE_TYPE;
1170 }
1171
1172 /* writeout checkpoint block */
1173 update_meta_page(sbi, ckpt, start_blk);
1174
1175 /* wait for previous submitted node/meta pages writeback */
1176 wait_on_all_pages_writeback(sbi);
1177
1178 if (unlikely(f2fs_cp_error(sbi)))
1179 return -EIO;
1180
1181 filemap_fdatawait_range(NODE_MAPPING(sbi), 0, LLONG_MAX);
1182 filemap_fdatawait_range(META_MAPPING(sbi), 0, LLONG_MAX);
1183
1184 /* update user_block_counts */
1185 sbi->last_valid_block_count = sbi->total_valid_block_count;
1186 percpu_counter_set(&sbi->alloc_valid_block_count, 0);
1187
1188 /* Here, we only have one bio having CP pack */
1189 sync_meta_pages(sbi, META_FLUSH, LONG_MAX);
1190
1191 /* wait for previous submitted meta pages writeback */
1192 wait_on_all_pages_writeback(sbi);
1193
1194 release_ino_entry(sbi, false);
1195
1196 if (unlikely(f2fs_cp_error(sbi)))
1197 return -EIO;
1198
1199 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1200 clear_sbi_flag(sbi, SBI_NEED_CP);
1201 __set_cp_next_pack(sbi);
1202
1203 /*
1204 * redirty superblock if metadata like node page or inode cache is
1205 * updated during writing checkpoint.
1206 */
1207 if (get_pages(sbi, F2FS_DIRTY_NODES) ||
1208 get_pages(sbi, F2FS_DIRTY_IMETA))
1209 set_sbi_flag(sbi, SBI_IS_DIRTY);
1210
1211 f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
1212
1213 return 0;
1214}
1215
1216/*
1217 * We guarantee that this checkpoint procedure will not fail.
1218 */
1219int write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1220{
1221 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1222 unsigned long long ckpt_ver;
1223 int err = 0;
1224
1225 mutex_lock(&sbi->cp_mutex);
1226
1227 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1228 (cpc->reason == CP_FASTBOOT || cpc->reason == CP_SYNC ||
1229 (cpc->reason == CP_DISCARD && !sbi->discard_blks)))
1230 goto out;
1231 if (unlikely(f2fs_cp_error(sbi))) {
1232 err = -EIO;
1233 goto out;
1234 }
1235 if (f2fs_readonly(sbi->sb)) {
1236 err = -EROFS;
1237 goto out;
1238 }
1239
1240 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1241
1242 err = block_operations(sbi);
1243 if (err)
1244 goto out;
1245
1246 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1247
1248 f2fs_flush_merged_bios(sbi);
1249
1250 /* this is the case of multiple fstrims without any changes */
1251 if (cpc->reason == CP_DISCARD && !is_sbi_flag_set(sbi, SBI_IS_DIRTY)) {
1252 f2fs_bug_on(sbi, NM_I(sbi)->dirty_nat_cnt);
1253 f2fs_bug_on(sbi, SIT_I(sbi)->dirty_sentries);
1254 f2fs_bug_on(sbi, prefree_segments(sbi));
1255 flush_sit_entries(sbi, cpc);
1256 clear_prefree_segments(sbi, cpc);
1257 f2fs_wait_all_discard_bio(sbi);
1258 unblock_operations(sbi);
1259 goto out;
1260 }
1261
1262 /*
1263 * update checkpoint pack index
1264 * Increase the version number so that
1265 * SIT entries and seg summaries are written at correct place
1266 */
1267 ckpt_ver = cur_cp_version(ckpt);
1268 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1269
1270 /* write cached NAT/SIT entries to NAT/SIT area */
1271 flush_nat_entries(sbi);
1272 flush_sit_entries(sbi, cpc);
1273
1274 /* unlock all the fs_lock[] in do_checkpoint() */
1275 err = do_checkpoint(sbi, cpc);
1276 if (err) {
1277 release_discard_addrs(sbi);
1278 } else {
1279 clear_prefree_segments(sbi, cpc);
1280 f2fs_wait_all_discard_bio(sbi);
1281 }
1282
1283 unblock_operations(sbi);
1284 stat_inc_cp_count(sbi->stat_info);
1285
1286 if (cpc->reason == CP_RECOVERY)
1287 f2fs_msg(sbi->sb, KERN_NOTICE,
1288 "checkpoint: version = %llx", ckpt_ver);
1289
1290 /* do checkpoint periodically */
1291 f2fs_update_time(sbi, CP_TIME);
1292 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1293out:
1294 mutex_unlock(&sbi->cp_mutex);
1295 return err;
1296}
1297
1298void init_ino_entry_info(struct f2fs_sb_info *sbi)
1299{
1300 int i;
1301
1302 for (i = 0; i < MAX_INO_ENTRY; i++) {
1303 struct inode_management *im = &sbi->im[i];
1304
1305 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1306 spin_lock_init(&im->ino_lock);
1307 INIT_LIST_HEAD(&im->ino_list);
1308 im->ino_num = 0;
1309 }
1310
1311 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1312 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1313 F2FS_ORPHANS_PER_BLOCK;
1314}
1315
1316int __init create_checkpoint_caches(void)
1317{
1318 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1319 sizeof(struct ino_entry));
1320 if (!ino_entry_slab)
1321 return -ENOMEM;
1322 inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1323 sizeof(struct inode_entry));
1324 if (!inode_entry_slab) {
1325 kmem_cache_destroy(ino_entry_slab);
1326 return -ENOMEM;
1327 }
1328 return 0;
1329}
1330
1331void destroy_checkpoint_caches(void)
1332{
1333 kmem_cache_destroy(ino_entry_slab);
1334 kmem_cache_destroy(inode_entry_slab);
1335}
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}