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Revert "tty: hvc: Fix data abort due to race in hvc_open"
[linux/fpc-iii.git] / fs / f2fs / checkpoint.c
blob448b3dc6f925a6c12e22c9b27b7131c45c910de8
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
23 static struct kmem_cache *ino_entry_slab;
24 struct kmem_cache *f2fs_inode_entry_slab;
25
26 void 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 */
37 struct 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;
41 repeat:
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 static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
54 bool is_meta)
55 {
56 struct address_space *mapping = META_MAPPING(sbi);
57 struct page *page;
58 struct f2fs_io_info fio = {
59 .sbi = sbi,
60 .type = META,
61 .op = REQ_OP_READ,
62 .op_flags = REQ_META | REQ_PRIO,
63 .old_blkaddr = index,
64 .new_blkaddr = index,
65 .encrypted_page = NULL,
66 .is_por = !is_meta,
67 };
68 int err;
69
70 if (unlikely(!is_meta))
71 fio.op_flags &= ~REQ_META;
72 repeat:
73 page = f2fs_grab_cache_page(mapping, index, false);
74 if (!page) {
75 cond_resched();
76 goto repeat;
77 }
78 if (PageUptodate(page))
79 goto out;
80
81 fio.page = page;
82
83 err = f2fs_submit_page_bio(&fio);
84 if (err) {
85 f2fs_put_page(page, 1);
86 return ERR_PTR(err);
87 }
88
89 lock_page(page);
90 if (unlikely(page->mapping != mapping)) {
91 f2fs_put_page(page, 1);
92 goto repeat;
93 }
94
95 if (unlikely(!PageUptodate(page))) {
96 f2fs_put_page(page, 1);
97 return ERR_PTR(-EIO);
98 }
99 out:
100 return page;
101 }
102
103 struct page *f2fs_get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index)
104 {
105 return __get_meta_page(sbi, index, true);
106 }
107
108 struct page *f2fs_get_meta_page_nofail(struct f2fs_sb_info *sbi, pgoff_t index)
109 {
110 struct page *page;
111 int count = 0;
112
113 retry:
114 page = __get_meta_page(sbi, index, true);
115 if (IS_ERR(page)) {
116 if (PTR_ERR(page) == -EIO &&
117 ++count <= DEFAULT_RETRY_IO_COUNT)
118 goto retry;
119 f2fs_stop_checkpoint(sbi, false);
120 }
121 return page;
122 }
123
124 /* for POR only */
125 struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
126 {
127 return __get_meta_page(sbi, index, false);
128 }
129
130 static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
131 int type)
132 {
133 struct seg_entry *se;
134 unsigned int segno, offset;
135 bool exist;
136
137 if (type != DATA_GENERIC_ENHANCE && type != DATA_GENERIC_ENHANCE_READ)
138 return true;
139
140 segno = GET_SEGNO(sbi, blkaddr);
141 offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
142 se = get_seg_entry(sbi, segno);
143
144 exist = f2fs_test_bit(offset, se->cur_valid_map);
145 if (!exist && type == DATA_GENERIC_ENHANCE) {
146 f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
147 blkaddr, exist);
148 set_sbi_flag(sbi, SBI_NEED_FSCK);
149 WARN_ON(1);
150 }
151 return exist;
152 }
153
154 bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
155 block_t blkaddr, int type)
156 {
157 switch (type) {
158 case META_NAT:
159 break;
160 case META_SIT:
161 if (unlikely(blkaddr >= SIT_BLK_CNT(sbi)))
162 return false;
163 break;
164 case META_SSA:
165 if (unlikely(blkaddr >= MAIN_BLKADDR(sbi) ||
166 blkaddr < SM_I(sbi)->ssa_blkaddr))
167 return false;
168 break;
169 case META_CP:
170 if (unlikely(blkaddr >= SIT_I(sbi)->sit_base_addr ||
171 blkaddr < __start_cp_addr(sbi)))
172 return false;
173 break;
174 case META_POR:
175 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
176 blkaddr < MAIN_BLKADDR(sbi)))
177 return false;
178 break;
179 case DATA_GENERIC:
180 case DATA_GENERIC_ENHANCE:
181 case DATA_GENERIC_ENHANCE_READ:
182 if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
183 blkaddr < MAIN_BLKADDR(sbi))) {
184 f2fs_warn(sbi, "access invalid blkaddr:%u",
185 blkaddr);
186 set_sbi_flag(sbi, SBI_NEED_FSCK);
187 WARN_ON(1);
188 return false;
189 } else {
190 return __is_bitmap_valid(sbi, blkaddr, type);
191 }
192 break;
193 case META_GENERIC:
194 if (unlikely(blkaddr < SEG0_BLKADDR(sbi) ||
195 blkaddr >= MAIN_BLKADDR(sbi)))
196 return false;
197 break;
198 default:
199 BUG();
200 }
201
202 return true;
203 }
204
205 /*
206 * Readahead CP/NAT/SIT/SSA/POR pages
207 */
208 int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
209 int type, bool sync)
210 {
211 struct page *page;
212 block_t blkno = start;
213 struct f2fs_io_info fio = {
214 .sbi = sbi,
215 .type = META,
216 .op = REQ_OP_READ,
217 .op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
218 .encrypted_page = NULL,
219 .in_list = false,
220 .is_por = (type == META_POR),
221 };
222 struct blk_plug plug;
223
224 if (unlikely(type == META_POR))
225 fio.op_flags &= ~REQ_META;
226
227 blk_start_plug(&plug);
228 for (; nrpages-- > 0; blkno++) {
229
230 if (!f2fs_is_valid_blkaddr(sbi, blkno, type))
231 goto out;
232
233 switch (type) {
234 case META_NAT:
235 if (unlikely(blkno >=
236 NAT_BLOCK_OFFSET(NM_I(sbi)->max_nid)))
237 blkno = 0;
238 /* get nat block addr */
239 fio.new_blkaddr = current_nat_addr(sbi,
240 blkno * NAT_ENTRY_PER_BLOCK);
241 break;
242 case META_SIT:
243 /* get sit block addr */
244 fio.new_blkaddr = current_sit_addr(sbi,
245 blkno * SIT_ENTRY_PER_BLOCK);
246 break;
247 case META_SSA:
248 case META_CP:
249 case META_POR:
250 fio.new_blkaddr = blkno;
251 break;
252 default:
253 BUG();
254 }
255
256 page = f2fs_grab_cache_page(META_MAPPING(sbi),
257 fio.new_blkaddr, false);
258 if (!page)
259 continue;
260 if (PageUptodate(page)) {
261 f2fs_put_page(page, 1);
262 continue;
263 }
264
265 fio.page = page;
266 f2fs_submit_page_bio(&fio);
267 f2fs_put_page(page, 0);
268 }
269 out:
270 blk_finish_plug(&plug);
271 return blkno - start;
272 }
273
274 void f2fs_ra_meta_pages_cond(struct f2fs_sb_info *sbi, pgoff_t index)
275 {
276 struct page *page;
277 bool readahead = false;
278
279 page = find_get_page(META_MAPPING(sbi), index);
280 if (!page || !PageUptodate(page))
281 readahead = true;
282 f2fs_put_page(page, 0);
283
284 if (readahead)
285 f2fs_ra_meta_pages(sbi, index, BIO_MAX_PAGES, META_POR, true);
286 }
287
288 static int __f2fs_write_meta_page(struct page *page,
289 struct writeback_control *wbc,
290 enum iostat_type io_type)
291 {
292 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
293
294 trace_f2fs_writepage(page, META);
295
296 if (unlikely(f2fs_cp_error(sbi)))
297 goto redirty_out;
298 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
299 goto redirty_out;
300 if (wbc->for_reclaim && page->index < GET_SUM_BLOCK(sbi, 0))
301 goto redirty_out;
302
303 f2fs_do_write_meta_page(sbi, page, io_type);
304 dec_page_count(sbi, F2FS_DIRTY_META);
305
306 if (wbc->for_reclaim)
307 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, META);
308
309 unlock_page(page);
310
311 if (unlikely(f2fs_cp_error(sbi)))
312 f2fs_submit_merged_write(sbi, META);
313
314 return 0;
315
316 redirty_out:
317 redirty_page_for_writepage(wbc, page);
318 return AOP_WRITEPAGE_ACTIVATE;
319 }
320
321 static int f2fs_write_meta_page(struct page *page,
322 struct writeback_control *wbc)
323 {
324 return __f2fs_write_meta_page(page, wbc, FS_META_IO);
325 }
326
327 static int f2fs_write_meta_pages(struct address_space *mapping,
328 struct writeback_control *wbc)
329 {
330 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
331 long diff, written;
332
333 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
334 goto skip_write;
335
336 /* collect a number of dirty meta pages and write together */
337 if (wbc->sync_mode != WB_SYNC_ALL &&
338 get_pages(sbi, F2FS_DIRTY_META) <
339 nr_pages_to_skip(sbi, META))
340 goto skip_write;
341
342 /* if locked failed, cp will flush dirty pages instead */
343 if (!mutex_trylock(&sbi->cp_mutex))
344 goto skip_write;
345
346 trace_f2fs_writepages(mapping->host, wbc, META);
347 diff = nr_pages_to_write(sbi, META, wbc);
348 written = f2fs_sync_meta_pages(sbi, META, wbc->nr_to_write, FS_META_IO);
349 mutex_unlock(&sbi->cp_mutex);
350 wbc->nr_to_write = max((long)0, wbc->nr_to_write - written - diff);
351 return 0;
352
353 skip_write:
354 wbc->pages_skipped += get_pages(sbi, F2FS_DIRTY_META);
355 trace_f2fs_writepages(mapping->host, wbc, META);
356 return 0;
357 }
358
359 long f2fs_sync_meta_pages(struct f2fs_sb_info *sbi, enum page_type type,
360 long nr_to_write, enum iostat_type io_type)
361 {
362 struct address_space *mapping = META_MAPPING(sbi);
363 pgoff_t index = 0, prev = ULONG_MAX;
364 struct pagevec pvec;
365 long nwritten = 0;
366 int nr_pages;
367 struct writeback_control wbc = {
368 .for_reclaim = 0,
369 };
370 struct blk_plug plug;
371
372 pagevec_init(&pvec);
373
374 blk_start_plug(&plug);
375
376 while ((nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
377 PAGECACHE_TAG_DIRTY))) {
378 int i;
379
380 for (i = 0; i < nr_pages; i++) {
381 struct page *page = pvec.pages[i];
382
383 if (prev == ULONG_MAX)
384 prev = page->index - 1;
385 if (nr_to_write != LONG_MAX && page->index != prev + 1) {
386 pagevec_release(&pvec);
387 goto stop;
388 }
389
390 lock_page(page);
391
392 if (unlikely(page->mapping != mapping)) {
393 continue_unlock:
394 unlock_page(page);
395 continue;
396 }
397 if (!PageDirty(page)) {
398 /* someone wrote it for us */
399 goto continue_unlock;
400 }
401
402 f2fs_wait_on_page_writeback(page, META, true, true);
403
404 if (!clear_page_dirty_for_io(page))
405 goto continue_unlock;
406
407 if (__f2fs_write_meta_page(page, &wbc, io_type)) {
408 unlock_page(page);
409 break;
410 }
411 nwritten++;
412 prev = page->index;
413 if (unlikely(nwritten >= nr_to_write))
414 break;
415 }
416 pagevec_release(&pvec);
417 cond_resched();
418 }
419 stop:
420 if (nwritten)
421 f2fs_submit_merged_write(sbi, type);
422
423 blk_finish_plug(&plug);
424
425 return nwritten;
426 }
427
428 static int f2fs_set_meta_page_dirty(struct page *page)
429 {
430 trace_f2fs_set_page_dirty(page, META);
431
432 if (!PageUptodate(page))
433 SetPageUptodate(page);
434 if (!PageDirty(page)) {
435 __set_page_dirty_nobuffers(page);
436 inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
437 f2fs_set_page_private(page, 0);
438 f2fs_trace_pid(page);
439 return 1;
440 }
441 return 0;
442 }
443
444 const struct address_space_operations f2fs_meta_aops = {
445 .writepage = f2fs_write_meta_page,
446 .writepages = f2fs_write_meta_pages,
447 .set_page_dirty = f2fs_set_meta_page_dirty,
448 .invalidatepage = f2fs_invalidate_page,
449 .releasepage = f2fs_release_page,
450 #ifdef CONFIG_MIGRATION
451 .migratepage = f2fs_migrate_page,
452 #endif
453 };
454
455 static void __add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino,
456 unsigned int devidx, int type)
457 {
458 struct inode_management *im = &sbi->im[type];
459 struct ino_entry *e, *tmp;
460
461 tmp = f2fs_kmem_cache_alloc(ino_entry_slab, GFP_NOFS);
462
463 radix_tree_preload(GFP_NOFS | __GFP_NOFAIL);
464
465 spin_lock(&im->ino_lock);
466 e = radix_tree_lookup(&im->ino_root, ino);
467 if (!e) {
468 e = tmp;
469 if (unlikely(radix_tree_insert(&im->ino_root, ino, e)))
470 f2fs_bug_on(sbi, 1);
471
472 memset(e, 0, sizeof(struct ino_entry));
473 e->ino = ino;
474
475 list_add_tail(&e->list, &im->ino_list);
476 if (type != ORPHAN_INO)
477 im->ino_num++;
478 }
479
480 if (type == FLUSH_INO)
481 f2fs_set_bit(devidx, (char *)&e->dirty_device);
482
483 spin_unlock(&im->ino_lock);
484 radix_tree_preload_end();
485
486 if (e != tmp)
487 kmem_cache_free(ino_entry_slab, tmp);
488 }
489
490 static void __remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
491 {
492 struct inode_management *im = &sbi->im[type];
493 struct ino_entry *e;
494
495 spin_lock(&im->ino_lock);
496 e = radix_tree_lookup(&im->ino_root, ino);
497 if (e) {
498 list_del(&e->list);
499 radix_tree_delete(&im->ino_root, ino);
500 im->ino_num--;
501 spin_unlock(&im->ino_lock);
502 kmem_cache_free(ino_entry_slab, e);
503 return;
504 }
505 spin_unlock(&im->ino_lock);
506 }
507
508 void f2fs_add_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
509 {
510 /* add new dirty ino entry into list */
511 __add_ino_entry(sbi, ino, 0, type);
512 }
513
514 void f2fs_remove_ino_entry(struct f2fs_sb_info *sbi, nid_t ino, int type)
515 {
516 /* remove dirty ino entry from list */
517 __remove_ino_entry(sbi, ino, type);
518 }
519
520 /* mode should be APPEND_INO or UPDATE_INO */
521 bool f2fs_exist_written_data(struct f2fs_sb_info *sbi, nid_t ino, int mode)
522 {
523 struct inode_management *im = &sbi->im[mode];
524 struct ino_entry *e;
525
526 spin_lock(&im->ino_lock);
527 e = radix_tree_lookup(&im->ino_root, ino);
528 spin_unlock(&im->ino_lock);
529 return e ? true : false;
530 }
531
532 void f2fs_release_ino_entry(struct f2fs_sb_info *sbi, bool all)
533 {
534 struct ino_entry *e, *tmp;
535 int i;
536
537 for (i = all ? ORPHAN_INO : APPEND_INO; i < MAX_INO_ENTRY; i++) {
538 struct inode_management *im = &sbi->im[i];
539
540 spin_lock(&im->ino_lock);
541 list_for_each_entry_safe(e, tmp, &im->ino_list, list) {
542 list_del(&e->list);
543 radix_tree_delete(&im->ino_root, e->ino);
544 kmem_cache_free(ino_entry_slab, e);
545 im->ino_num--;
546 }
547 spin_unlock(&im->ino_lock);
548 }
549 }
550
551 void f2fs_set_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
552 unsigned int devidx, int type)
553 {
554 __add_ino_entry(sbi, ino, devidx, type);
555 }
556
557 bool f2fs_is_dirty_device(struct f2fs_sb_info *sbi, nid_t ino,
558 unsigned int devidx, int type)
559 {
560 struct inode_management *im = &sbi->im[type];
561 struct ino_entry *e;
562 bool is_dirty = false;
563
564 spin_lock(&im->ino_lock);
565 e = radix_tree_lookup(&im->ino_root, ino);
566 if (e && f2fs_test_bit(devidx, (char *)&e->dirty_device))
567 is_dirty = true;
568 spin_unlock(&im->ino_lock);
569 return is_dirty;
570 }
571
572 int f2fs_acquire_orphan_inode(struct f2fs_sb_info *sbi)
573 {
574 struct inode_management *im = &sbi->im[ORPHAN_INO];
575 int err = 0;
576
577 spin_lock(&im->ino_lock);
578
579 if (time_to_inject(sbi, FAULT_ORPHAN)) {
580 spin_unlock(&im->ino_lock);
581 f2fs_show_injection_info(sbi, FAULT_ORPHAN);
582 return -ENOSPC;
583 }
584
585 if (unlikely(im->ino_num >= sbi->max_orphans))
586 err = -ENOSPC;
587 else
588 im->ino_num++;
589 spin_unlock(&im->ino_lock);
590
591 return err;
592 }
593
594 void f2fs_release_orphan_inode(struct f2fs_sb_info *sbi)
595 {
596 struct inode_management *im = &sbi->im[ORPHAN_INO];
597
598 spin_lock(&im->ino_lock);
599 f2fs_bug_on(sbi, im->ino_num == 0);
600 im->ino_num--;
601 spin_unlock(&im->ino_lock);
602 }
603
604 void f2fs_add_orphan_inode(struct inode *inode)
605 {
606 /* add new orphan ino entry into list */
607 __add_ino_entry(F2FS_I_SB(inode), inode->i_ino, 0, ORPHAN_INO);
608 f2fs_update_inode_page(inode);
609 }
610
611 void f2fs_remove_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
612 {
613 /* remove orphan entry from orphan list */
614 __remove_ino_entry(sbi, ino, ORPHAN_INO);
615 }
616
617 static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
618 {
619 struct inode *inode;
620 struct node_info ni;
621 int err;
622
623 inode = f2fs_iget_retry(sbi->sb, ino);
624 if (IS_ERR(inode)) {
625 /*
626 * there should be a bug that we can't find the entry
627 * to orphan inode.
628 */
629 f2fs_bug_on(sbi, PTR_ERR(inode) == -ENOENT);
630 return PTR_ERR(inode);
631 }
632
633 err = dquot_initialize(inode);
634 if (err) {
635 iput(inode);
636 goto err_out;
637 }
638
639 clear_nlink(inode);
640
641 /* truncate all the data during iput */
642 iput(inode);
643
644 err = f2fs_get_node_info(sbi, ino, &ni);
645 if (err)
646 goto err_out;
647
648 /* ENOMEM was fully retried in f2fs_evict_inode. */
649 if (ni.blk_addr != NULL_ADDR) {
650 err = -EIO;
651 goto err_out;
652 }
653 return 0;
654
655 err_out:
656 set_sbi_flag(sbi, SBI_NEED_FSCK);
657 f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
658 __func__, ino);
659 return err;
660 }
661
662 int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
663 {
664 block_t start_blk, orphan_blocks, i, j;
665 unsigned int s_flags = sbi->sb->s_flags;
666 int err = 0;
667 #ifdef CONFIG_QUOTA
668 int quota_enabled;
669 #endif
670
671 if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
672 return 0;
673
674 if (bdev_read_only(sbi->sb->s_bdev)) {
675 f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
676 return 0;
677 }
678
679 if (s_flags & SB_RDONLY) {
680 f2fs_info(sbi, "orphan cleanup on readonly fs");
681 sbi->sb->s_flags &= ~SB_RDONLY;
682 }
683
684 #ifdef CONFIG_QUOTA
685 /* Needed for iput() to work correctly and not trash data */
686 sbi->sb->s_flags |= SB_ACTIVE;
687
688 /*
689 * Turn on quotas which were not enabled for read-only mounts if
690 * filesystem has quota feature, so that they are updated correctly.
691 */
692 quota_enabled = f2fs_enable_quota_files(sbi, s_flags & SB_RDONLY);
693 #endif
694
695 start_blk = __start_cp_addr(sbi) + 1 + __cp_payload(sbi);
696 orphan_blocks = __start_sum_addr(sbi) - 1 - __cp_payload(sbi);
697
698 f2fs_ra_meta_pages(sbi, start_blk, orphan_blocks, META_CP, true);
699
700 for (i = 0; i < orphan_blocks; i++) {
701 struct page *page;
702 struct f2fs_orphan_block *orphan_blk;
703
704 page = f2fs_get_meta_page(sbi, start_blk + i);
705 if (IS_ERR(page)) {
706 err = PTR_ERR(page);
707 goto out;
708 }
709
710 orphan_blk = (struct f2fs_orphan_block *)page_address(page);
711 for (j = 0; j < le32_to_cpu(orphan_blk->entry_count); j++) {
712 nid_t ino = le32_to_cpu(orphan_blk->ino[j]);
713 err = recover_orphan_inode(sbi, ino);
714 if (err) {
715 f2fs_put_page(page, 1);
716 goto out;
717 }
718 }
719 f2fs_put_page(page, 1);
720 }
721 /* clear Orphan Flag */
722 clear_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG);
723 out:
724 set_sbi_flag(sbi, SBI_IS_RECOVERED);
725
726 #ifdef CONFIG_QUOTA
727 /* Turn quotas off */
728 if (quota_enabled)
729 f2fs_quota_off_umount(sbi->sb);
730 #endif
731 sbi->sb->s_flags = s_flags; /* Restore SB_RDONLY status */
732
733 return err;
734 }
735
736 static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
737 {
738 struct list_head *head;
739 struct f2fs_orphan_block *orphan_blk = NULL;
740 unsigned int nentries = 0;
741 unsigned short index = 1;
742 unsigned short orphan_blocks;
743 struct page *page = NULL;
744 struct ino_entry *orphan = NULL;
745 struct inode_management *im = &sbi->im[ORPHAN_INO];
746
747 orphan_blocks = GET_ORPHAN_BLOCKS(im->ino_num);
748
749 /*
750 * we don't need to do spin_lock(&im->ino_lock) here, since all the
751 * orphan inode operations are covered under f2fs_lock_op().
752 * And, spin_lock should be avoided due to page operations below.
753 */
754 head = &im->ino_list;
755
756 /* loop for each orphan inode entry and write them in Jornal block */
757 list_for_each_entry(orphan, head, list) {
758 if (!page) {
759 page = f2fs_grab_meta_page(sbi, start_blk++);
760 orphan_blk =
761 (struct f2fs_orphan_block *)page_address(page);
762 memset(orphan_blk, 0, sizeof(*orphan_blk));
763 }
764
765 orphan_blk->ino[nentries++] = cpu_to_le32(orphan->ino);
766
767 if (nentries == F2FS_ORPHANS_PER_BLOCK) {
768 /*
769 * an orphan block is full of 1020 entries,
770 * then we need to flush current orphan blocks
771 * and bring another one in memory
772 */
773 orphan_blk->blk_addr = cpu_to_le16(index);
774 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
775 orphan_blk->entry_count = cpu_to_le32(nentries);
776 set_page_dirty(page);
777 f2fs_put_page(page, 1);
778 index++;
779 nentries = 0;
780 page = NULL;
781 }
782 }
783
784 if (page) {
785 orphan_blk->blk_addr = cpu_to_le16(index);
786 orphan_blk->blk_count = cpu_to_le16(orphan_blocks);
787 orphan_blk->entry_count = cpu_to_le32(nentries);
788 set_page_dirty(page);
789 f2fs_put_page(page, 1);
790 }
791 }
792
793 static __u32 f2fs_checkpoint_chksum(struct f2fs_sb_info *sbi,
794 struct f2fs_checkpoint *ckpt)
795 {
796 unsigned int chksum_ofs = le32_to_cpu(ckpt->checksum_offset);
797 __u32 chksum;
798
799 chksum = f2fs_crc32(sbi, ckpt, chksum_ofs);
800 if (chksum_ofs < CP_CHKSUM_OFFSET) {
801 chksum_ofs += sizeof(chksum);
802 chksum = f2fs_chksum(sbi, chksum, (__u8 *)ckpt + chksum_ofs,
803 F2FS_BLKSIZE - chksum_ofs);
804 }
805 return chksum;
806 }
807
808 static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
809 struct f2fs_checkpoint **cp_block, struct page **cp_page,
810 unsigned long long *version)
811 {
812 size_t crc_offset = 0;
813 __u32 crc;
814
815 *cp_page = f2fs_get_meta_page(sbi, cp_addr);
816 if (IS_ERR(*cp_page))
817 return PTR_ERR(*cp_page);
818
819 *cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
820
821 crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
822 if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
823 crc_offset > CP_CHKSUM_OFFSET) {
824 f2fs_put_page(*cp_page, 1);
825 f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
826 return -EINVAL;
827 }
828
829 crc = f2fs_checkpoint_chksum(sbi, *cp_block);
830 if (crc != cur_cp_crc(*cp_block)) {
831 f2fs_put_page(*cp_page, 1);
832 f2fs_warn(sbi, "invalid crc value");
833 return -EINVAL;
834 }
835
836 *version = cur_cp_version(*cp_block);
837 return 0;
838 }
839
840 static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
841 block_t cp_addr, unsigned long long *version)
842 {
843 struct page *cp_page_1 = NULL, *cp_page_2 = NULL;
844 struct f2fs_checkpoint *cp_block = NULL;
845 unsigned long long cur_version = 0, pre_version = 0;
846 int err;
847
848 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
849 &cp_page_1, version);
850 if (err)
851 return NULL;
852
853 if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
854 sbi->blocks_per_seg) {
855 f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
856 le32_to_cpu(cp_block->cp_pack_total_block_count));
857 goto invalid_cp;
858 }
859 pre_version = *version;
860
861 cp_addr += le32_to_cpu(cp_block->cp_pack_total_block_count) - 1;
862 err = get_checkpoint_version(sbi, cp_addr, &cp_block,
863 &cp_page_2, version);
864 if (err)
865 goto invalid_cp;
866 cur_version = *version;
867
868 if (cur_version == pre_version) {
869 *version = cur_version;
870 f2fs_put_page(cp_page_2, 1);
871 return cp_page_1;
872 }
873 f2fs_put_page(cp_page_2, 1);
874 invalid_cp:
875 f2fs_put_page(cp_page_1, 1);
876 return NULL;
877 }
878
879 int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
880 {
881 struct f2fs_checkpoint *cp_block;
882 struct f2fs_super_block *fsb = sbi->raw_super;
883 struct page *cp1, *cp2, *cur_page;
884 unsigned long blk_size = sbi->blocksize;
885 unsigned long long cp1_version = 0, cp2_version = 0;
886 unsigned long long cp_start_blk_no;
887 unsigned int cp_blks = 1 + __cp_payload(sbi);
888 block_t cp_blk_no;
889 int i;
890 int err;
891
892 sbi->ckpt = f2fs_kvzalloc(sbi, array_size(blk_size, cp_blks),
893 GFP_KERNEL);
894 if (!sbi->ckpt)
895 return -ENOMEM;
896 /*
897 * Finding out valid cp block involves read both
898 * sets( cp pack 1 and cp pack 2)
899 */
900 cp_start_blk_no = le32_to_cpu(fsb->cp_blkaddr);
901 cp1 = validate_checkpoint(sbi, cp_start_blk_no, &cp1_version);
902
903 /* The second checkpoint pack should start at the next segment */
904 cp_start_blk_no += ((unsigned long long)1) <<
905 le32_to_cpu(fsb->log_blocks_per_seg);
906 cp2 = validate_checkpoint(sbi, cp_start_blk_no, &cp2_version);
907
908 if (cp1 && cp2) {
909 if (ver_after(cp2_version, cp1_version))
910 cur_page = cp2;
911 else
912 cur_page = cp1;
913 } else if (cp1) {
914 cur_page = cp1;
915 } else if (cp2) {
916 cur_page = cp2;
917 } else {
918 err = -EFSCORRUPTED;
919 goto fail_no_cp;
920 }
921
922 cp_block = (struct f2fs_checkpoint *)page_address(cur_page);
923 memcpy(sbi->ckpt, cp_block, blk_size);
924
925 if (cur_page == cp1)
926 sbi->cur_cp_pack = 1;
927 else
928 sbi->cur_cp_pack = 2;
929
930 /* Sanity checking of checkpoint */
931 if (f2fs_sanity_check_ckpt(sbi)) {
932 err = -EFSCORRUPTED;
933 goto free_fail_no_cp;
934 }
935
936 if (cp_blks <= 1)
937 goto done;
938
939 cp_blk_no = le32_to_cpu(fsb->cp_blkaddr);
940 if (cur_page == cp2)
941 cp_blk_no += 1 << le32_to_cpu(fsb->log_blocks_per_seg);
942
943 for (i = 1; i < cp_blks; i++) {
944 void *sit_bitmap_ptr;
945 unsigned char *ckpt = (unsigned char *)sbi->ckpt;
946
947 cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
948 if (IS_ERR(cur_page)) {
949 err = PTR_ERR(cur_page);
950 goto free_fail_no_cp;
951 }
952 sit_bitmap_ptr = page_address(cur_page);
953 memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
954 f2fs_put_page(cur_page, 1);
955 }
956 done:
957 f2fs_put_page(cp1, 1);
958 f2fs_put_page(cp2, 1);
959 return 0;
960
961 free_fail_no_cp:
962 f2fs_put_page(cp1, 1);
963 f2fs_put_page(cp2, 1);
964 fail_no_cp:
965 kvfree(sbi->ckpt);
966 return err;
967 }
968
969 static void __add_dirty_inode(struct inode *inode, enum inode_type type)
970 {
971 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
972 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
973
974 if (is_inode_flag_set(inode, flag))
975 return;
976
977 set_inode_flag(inode, flag);
978 if (!f2fs_is_volatile_file(inode))
979 list_add_tail(&F2FS_I(inode)->dirty_list,
980 &sbi->inode_list[type]);
981 stat_inc_dirty_inode(sbi, type);
982 }
983
984 static void __remove_dirty_inode(struct inode *inode, enum inode_type type)
985 {
986 int flag = (type == DIR_INODE) ? FI_DIRTY_DIR : FI_DIRTY_FILE;
987
988 if (get_dirty_pages(inode) || !is_inode_flag_set(inode, flag))
989 return;
990
991 list_del_init(&F2FS_I(inode)->dirty_list);
992 clear_inode_flag(inode, flag);
993 stat_dec_dirty_inode(F2FS_I_SB(inode), type);
994 }
995
996 void f2fs_update_dirty_page(struct inode *inode, struct page *page)
997 {
998 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
999 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1000
1001 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1002 !S_ISLNK(inode->i_mode))
1003 return;
1004
1005 spin_lock(&sbi->inode_lock[type]);
1006 if (type != FILE_INODE || test_opt(sbi, DATA_FLUSH))
1007 __add_dirty_inode(inode, type);
1008 inode_inc_dirty_pages(inode);
1009 spin_unlock(&sbi->inode_lock[type]);
1010
1011 f2fs_set_page_private(page, 0);
1012 f2fs_trace_pid(page);
1013 }
1014
1015 void f2fs_remove_dirty_inode(struct inode *inode)
1016 {
1017 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1018 enum inode_type type = S_ISDIR(inode->i_mode) ? DIR_INODE : FILE_INODE;
1019
1020 if (!S_ISDIR(inode->i_mode) && !S_ISREG(inode->i_mode) &&
1021 !S_ISLNK(inode->i_mode))
1022 return;
1023
1024 if (type == FILE_INODE && !test_opt(sbi, DATA_FLUSH))
1025 return;
1026
1027 spin_lock(&sbi->inode_lock[type]);
1028 __remove_dirty_inode(inode, type);
1029 spin_unlock(&sbi->inode_lock[type]);
1030 }
1031
1032 int f2fs_sync_dirty_inodes(struct f2fs_sb_info *sbi, enum inode_type type)
1033 {
1034 struct list_head *head;
1035 struct inode *inode;
1036 struct f2fs_inode_info *fi;
1037 bool is_dir = (type == DIR_INODE);
1038 unsigned long ino = 0;
1039
1040 trace_f2fs_sync_dirty_inodes_enter(sbi->sb, is_dir,
1041 get_pages(sbi, is_dir ?
1042 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1043 retry:
1044 if (unlikely(f2fs_cp_error(sbi)))
1045 return -EIO;
1046
1047 spin_lock(&sbi->inode_lock[type]);
1048
1049 head = &sbi->inode_list[type];
1050 if (list_empty(head)) {
1051 spin_unlock(&sbi->inode_lock[type]);
1052 trace_f2fs_sync_dirty_inodes_exit(sbi->sb, is_dir,
1053 get_pages(sbi, is_dir ?
1054 F2FS_DIRTY_DENTS : F2FS_DIRTY_DATA));
1055 return 0;
1056 }
1057 fi = list_first_entry(head, struct f2fs_inode_info, dirty_list);
1058 inode = igrab(&fi->vfs_inode);
1059 spin_unlock(&sbi->inode_lock[type]);
1060 if (inode) {
1061 unsigned long cur_ino = inode->i_ino;
1062
1063 F2FS_I(inode)->cp_task = current;
1064
1065 filemap_fdatawrite(inode->i_mapping);
1066
1067 F2FS_I(inode)->cp_task = NULL;
1068
1069 iput(inode);
1070 /* We need to give cpu to another writers. */
1071 if (ino == cur_ino)
1072 cond_resched();
1073 else
1074 ino = cur_ino;
1075 } else {
1076 /*
1077 * We should submit bio, since it exists several
1078 * wribacking dentry pages in the freeing inode.
1079 */
1080 f2fs_submit_merged_write(sbi, DATA);
1081 cond_resched();
1082 }
1083 goto retry;
1084 }
1085
1086 int f2fs_sync_inode_meta(struct f2fs_sb_info *sbi)
1087 {
1088 struct list_head *head = &sbi->inode_list[DIRTY_META];
1089 struct inode *inode;
1090 struct f2fs_inode_info *fi;
1091 s64 total = get_pages(sbi, F2FS_DIRTY_IMETA);
1092
1093 while (total--) {
1094 if (unlikely(f2fs_cp_error(sbi)))
1095 return -EIO;
1096
1097 spin_lock(&sbi->inode_lock[DIRTY_META]);
1098 if (list_empty(head)) {
1099 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1100 return 0;
1101 }
1102 fi = list_first_entry(head, struct f2fs_inode_info,
1103 gdirty_list);
1104 inode = igrab(&fi->vfs_inode);
1105 spin_unlock(&sbi->inode_lock[DIRTY_META]);
1106 if (inode) {
1107 sync_inode_metadata(inode, 0);
1108
1109 /* it's on eviction */
1110 if (is_inode_flag_set(inode, FI_DIRTY_INODE))
1111 f2fs_update_inode_page(inode);
1112 iput(inode);
1113 }
1114 }
1115 return 0;
1116 }
1117
1118 static void __prepare_cp_block(struct f2fs_sb_info *sbi)
1119 {
1120 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1121 struct f2fs_nm_info *nm_i = NM_I(sbi);
1122 nid_t last_nid = nm_i->next_scan_nid;
1123
1124 next_free_nid(sbi, &last_nid);
1125 ckpt->valid_block_count = cpu_to_le64(valid_user_blocks(sbi));
1126 ckpt->valid_node_count = cpu_to_le32(valid_node_count(sbi));
1127 ckpt->valid_inode_count = cpu_to_le32(valid_inode_count(sbi));
1128 ckpt->next_free_nid = cpu_to_le32(last_nid);
1129 }
1130
1131 static bool __need_flush_quota(struct f2fs_sb_info *sbi)
1132 {
1133 bool ret = false;
1134
1135 if (!is_journalled_quota(sbi))
1136 return false;
1137
1138 down_write(&sbi->quota_sem);
1139 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
1140 ret = false;
1141 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
1142 ret = false;
1143 } else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
1144 clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1145 ret = true;
1146 } else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
1147 ret = true;
1148 }
1149 up_write(&sbi->quota_sem);
1150 return ret;
1151 }
1152
1153 /*
1154 * Freeze all the FS-operations for checkpoint.
1155 */
1156 static int block_operations(struct f2fs_sb_info *sbi)
1157 {
1158 struct writeback_control wbc = {
1159 .sync_mode = WB_SYNC_ALL,
1160 .nr_to_write = LONG_MAX,
1161 .for_reclaim = 0,
1162 };
1163 struct blk_plug plug;
1164 int err = 0, cnt = 0;
1165
1166 blk_start_plug(&plug);
1167
1168 retry_flush_quotas:
1169 f2fs_lock_all(sbi);
1170 if (__need_flush_quota(sbi)) {
1171 int locked;
1172
1173 if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
1174 set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1175 set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
1176 goto retry_flush_dents;
1177 }
1178 f2fs_unlock_all(sbi);
1179
1180 /* only failed during mount/umount/freeze/quotactl */
1181 locked = down_read_trylock(&sbi->sb->s_umount);
1182 f2fs_quota_sync(sbi->sb, -1);
1183 if (locked)
1184 up_read(&sbi->sb->s_umount);
1185 cond_resched();
1186 goto retry_flush_quotas;
1187 }
1188
1189 retry_flush_dents:
1190 /* write all the dirty dentry pages */
1191 if (get_pages(sbi, F2FS_DIRTY_DENTS)) {
1192 f2fs_unlock_all(sbi);
1193 err = f2fs_sync_dirty_inodes(sbi, DIR_INODE);
1194 if (err)
1195 goto out;
1196 cond_resched();
1197 goto retry_flush_quotas;
1198 }
1199
1200 /*
1201 * POR: we should ensure that there are no dirty node pages
1202 * until finishing nat/sit flush. inode->i_blocks can be updated.
1203 */
1204 down_write(&sbi->node_change);
1205
1206 if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
1207 up_write(&sbi->node_change);
1208 f2fs_unlock_all(sbi);
1209 err = f2fs_sync_inode_meta(sbi);
1210 if (err)
1211 goto out;
1212 cond_resched();
1213 goto retry_flush_quotas;
1214 }
1215
1216 retry_flush_nodes:
1217 down_write(&sbi->node_write);
1218
1219 if (get_pages(sbi, F2FS_DIRTY_NODES)) {
1220 up_write(&sbi->node_write);
1221 atomic_inc(&sbi->wb_sync_req[NODE]);
1222 err = f2fs_sync_node_pages(sbi, &wbc, false, FS_CP_NODE_IO);
1223 atomic_dec(&sbi->wb_sync_req[NODE]);
1224 if (err) {
1225 up_write(&sbi->node_change);
1226 f2fs_unlock_all(sbi);
1227 goto out;
1228 }
1229 cond_resched();
1230 goto retry_flush_nodes;
1231 }
1232
1233 /*
1234 * sbi->node_change is used only for AIO write_begin path which produces
1235 * dirty node blocks and some checkpoint values by block allocation.
1236 */
1237 __prepare_cp_block(sbi);
1238 up_write(&sbi->node_change);
1239 out:
1240 blk_finish_plug(&plug);
1241 return err;
1242 }
1243
1244 static void unblock_operations(struct f2fs_sb_info *sbi)
1245 {
1246 up_write(&sbi->node_write);
1247 f2fs_unlock_all(sbi);
1248 }
1249
1250 void f2fs_wait_on_all_pages(struct f2fs_sb_info *sbi, int type)
1251 {
1252 DEFINE_WAIT(wait);
1253
1254 for (;;) {
1255 prepare_to_wait(&sbi->cp_wait, &wait, TASK_UNINTERRUPTIBLE);
1256
1257 if (!get_pages(sbi, type))
1258 break;
1259
1260 if (unlikely(f2fs_cp_error(sbi)))
1261 break;
1262
1263 io_schedule_timeout(DEFAULT_IO_TIMEOUT);
1264 }
1265 finish_wait(&sbi->cp_wait, &wait);
1266 }
1267
1268 static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1269 {
1270 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num;
1271 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1272 unsigned long flags;
1273
1274 spin_lock_irqsave(&sbi->cp_lock, flags);
1275
1276 if ((cpc->reason & CP_UMOUNT) &&
1277 le32_to_cpu(ckpt->cp_pack_total_block_count) >
1278 sbi->blocks_per_seg - NM_I(sbi)->nat_bits_blocks)
1279 disable_nat_bits(sbi, false);
1280
1281 if (cpc->reason & CP_TRIMMED)
1282 __set_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1283 else
1284 __clear_ckpt_flags(ckpt, CP_TRIMMED_FLAG);
1285
1286 if (cpc->reason & CP_UMOUNT)
1287 __set_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1288 else
1289 __clear_ckpt_flags(ckpt, CP_UMOUNT_FLAG);
1290
1291 if (cpc->reason & CP_FASTBOOT)
1292 __set_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1293 else
1294 __clear_ckpt_flags(ckpt, CP_FASTBOOT_FLAG);
1295
1296 if (orphan_num)
1297 __set_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1298 else
1299 __clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
1300
1301 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
1302 __set_ckpt_flags(ckpt, CP_FSCK_FLAG);
1303
1304 if (is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
1305 __set_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
1306 else
1307 __clear_ckpt_flags(ckpt, CP_RESIZEFS_FLAG);
1308
1309 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
1310 __set_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1311 else
1312 __clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
1313
1314 if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
1315 __set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1316 else
1317 __clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
1318
1319 if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
1320 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1321 else
1322 __clear_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1323
1324 if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
1325 __set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
1326
1327 /* set this flag to activate crc|cp_ver for recovery */
1328 __set_ckpt_flags(ckpt, CP_CRC_RECOVERY_FLAG);
1329 __clear_ckpt_flags(ckpt, CP_NOCRC_RECOVERY_FLAG);
1330
1331 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1332 }
1333
1334 static void commit_checkpoint(struct f2fs_sb_info *sbi,
1335 void *src, block_t blk_addr)
1336 {
1337 struct writeback_control wbc = {
1338 .for_reclaim = 0,
1339 };
1340
1341 /*
1342 * pagevec_lookup_tag and lock_page again will take
1343 * some extra time. Therefore, f2fs_update_meta_pages and
1344 * f2fs_sync_meta_pages are combined in this function.
1345 */
1346 struct page *page = f2fs_grab_meta_page(sbi, blk_addr);
1347 int err;
1348
1349 f2fs_wait_on_page_writeback(page, META, true, true);
1350
1351 memcpy(page_address(page), src, PAGE_SIZE);
1352
1353 set_page_dirty(page);
1354 if (unlikely(!clear_page_dirty_for_io(page)))
1355 f2fs_bug_on(sbi, 1);
1356
1357 /* writeout cp pack 2 page */
1358 err = __f2fs_write_meta_page(page, &wbc, FS_CP_META_IO);
1359 if (unlikely(err && f2fs_cp_error(sbi))) {
1360 f2fs_put_page(page, 1);
1361 return;
1362 }
1363
1364 f2fs_bug_on(sbi, err);
1365 f2fs_put_page(page, 0);
1366
1367 /* submit checkpoint (with barrier if NOBARRIER is not set) */
1368 f2fs_submit_merged_write(sbi, META_FLUSH);
1369 }
1370
1371 static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1372 {
1373 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1374 struct f2fs_nm_info *nm_i = NM_I(sbi);
1375 unsigned long orphan_num = sbi->im[ORPHAN_INO].ino_num, flags;
1376 block_t start_blk;
1377 unsigned int data_sum_blocks, orphan_blocks;
1378 __u32 crc32 = 0;
1379 int i;
1380 int cp_payload_blks = __cp_payload(sbi);
1381 struct super_block *sb = sbi->sb;
1382 struct curseg_info *seg_i = CURSEG_I(sbi, CURSEG_HOT_NODE);
1383 u64 kbytes_written;
1384 int err;
1385
1386 /* Flush all the NAT/SIT pages */
1387 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1388
1389 /* start to update checkpoint, cp ver is already updated previously */
1390 ckpt->elapsed_time = cpu_to_le64(get_mtime(sbi, true));
1391 ckpt->free_segment_count = cpu_to_le32(free_segments(sbi));
1392 for (i = 0; i < NR_CURSEG_NODE_TYPE; i++) {
1393 ckpt->cur_node_segno[i] =
1394 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_NODE));
1395 ckpt->cur_node_blkoff[i] =
1396 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_NODE));
1397 ckpt->alloc_type[i + CURSEG_HOT_NODE] =
1398 curseg_alloc_type(sbi, i + CURSEG_HOT_NODE);
1399 }
1400 for (i = 0; i < NR_CURSEG_DATA_TYPE; i++) {
1401 ckpt->cur_data_segno[i] =
1402 cpu_to_le32(curseg_segno(sbi, i + CURSEG_HOT_DATA));
1403 ckpt->cur_data_blkoff[i] =
1404 cpu_to_le16(curseg_blkoff(sbi, i + CURSEG_HOT_DATA));
1405 ckpt->alloc_type[i + CURSEG_HOT_DATA] =
1406 curseg_alloc_type(sbi, i + CURSEG_HOT_DATA);
1407 }
1408
1409 /* 2 cp + n data seg summary + orphan inode blocks */
1410 data_sum_blocks = f2fs_npages_for_summary_flush(sbi, false);
1411 spin_lock_irqsave(&sbi->cp_lock, flags);
1412 if (data_sum_blocks < NR_CURSEG_DATA_TYPE)
1413 __set_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1414 else
1415 __clear_ckpt_flags(ckpt, CP_COMPACT_SUM_FLAG);
1416 spin_unlock_irqrestore(&sbi->cp_lock, flags);
1417
1418 orphan_blocks = GET_ORPHAN_BLOCKS(orphan_num);
1419 ckpt->cp_pack_start_sum = cpu_to_le32(1 + cp_payload_blks +
1420 orphan_blocks);
1421
1422 if (__remain_node_summaries(cpc->reason))
1423 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS+
1424 cp_payload_blks + data_sum_blocks +
1425 orphan_blocks + NR_CURSEG_NODE_TYPE);
1426 else
1427 ckpt->cp_pack_total_block_count = cpu_to_le32(F2FS_CP_PACKS +
1428 cp_payload_blks + data_sum_blocks +
1429 orphan_blocks);
1430
1431 /* update ckpt flag for checkpoint */
1432 update_ckpt_flags(sbi, cpc);
1433
1434 /* update SIT/NAT bitmap */
1435 get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
1436 get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
1437
1438 crc32 = f2fs_checkpoint_chksum(sbi, ckpt);
1439 *((__le32 *)((unsigned char *)ckpt +
1440 le32_to_cpu(ckpt->checksum_offset)))
1441 = cpu_to_le32(crc32);
1442
1443 start_blk = __start_cp_next_addr(sbi);
1444
1445 /* write nat bits */
1446 if (enabled_nat_bits(sbi, cpc)) {
1447 __u64 cp_ver = cur_cp_version(ckpt);
1448 block_t blk;
1449
1450 cp_ver |= ((__u64)crc32 << 32);
1451 *(__le64 *)nm_i->nat_bits = cpu_to_le64(cp_ver);
1452
1453 blk = start_blk + sbi->blocks_per_seg - nm_i->nat_bits_blocks;
1454 for (i = 0; i < nm_i->nat_bits_blocks; i++)
1455 f2fs_update_meta_page(sbi, nm_i->nat_bits +
1456 (i << F2FS_BLKSIZE_BITS), blk + i);
1457 }
1458
1459 /* write out checkpoint buffer at block 0 */
1460 f2fs_update_meta_page(sbi, ckpt, start_blk++);
1461
1462 for (i = 1; i < 1 + cp_payload_blks; i++)
1463 f2fs_update_meta_page(sbi, (char *)ckpt + i * F2FS_BLKSIZE,
1464 start_blk++);
1465
1466 if (orphan_num) {
1467 write_orphan_inodes(sbi, start_blk);
1468 start_blk += orphan_blocks;
1469 }
1470
1471 f2fs_write_data_summaries(sbi, start_blk);
1472 start_blk += data_sum_blocks;
1473
1474 /* Record write statistics in the hot node summary */
1475 kbytes_written = sbi->kbytes_written;
1476 if (sb->s_bdev->bd_part)
1477 kbytes_written += BD_PART_WRITTEN(sbi);
1478
1479 seg_i->journal->info.kbytes_written = cpu_to_le64(kbytes_written);
1480
1481 if (__remain_node_summaries(cpc->reason)) {
1482 f2fs_write_node_summaries(sbi, start_blk);
1483 start_blk += NR_CURSEG_NODE_TYPE;
1484 }
1485
1486 /* update user_block_counts */
1487 sbi->last_valid_block_count = sbi->total_valid_block_count;
1488 percpu_counter_set(&sbi->alloc_valid_block_count, 0);
1489
1490 /* Here, we have one bio having CP pack except cp pack 2 page */
1491 f2fs_sync_meta_pages(sbi, META, LONG_MAX, FS_CP_META_IO);
1492 /* Wait for all dirty meta pages to be submitted for IO */
1493 f2fs_wait_on_all_pages(sbi, F2FS_DIRTY_META);
1494
1495 /* wait for previous submitted meta pages writeback */
1496 f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1497
1498 /* flush all device cache */
1499 err = f2fs_flush_device_cache(sbi);
1500 if (err)
1501 return err;
1502
1503 /* barrier and flush checkpoint cp pack 2 page if it can */
1504 commit_checkpoint(sbi, ckpt, start_blk);
1505 f2fs_wait_on_all_pages(sbi, F2FS_WB_CP_DATA);
1506
1507 /*
1508 * invalidate intermediate page cache borrowed from meta inode which are
1509 * used for migration of encrypted or verity inode's blocks.
1510 */
1511 if (f2fs_sb_has_encrypt(sbi) || f2fs_sb_has_verity(sbi))
1512 invalidate_mapping_pages(META_MAPPING(sbi),
1513 MAIN_BLKADDR(sbi), MAX_BLKADDR(sbi) - 1);
1514
1515 f2fs_release_ino_entry(sbi, false);
1516
1517 f2fs_reset_fsync_node_info(sbi);
1518
1519 clear_sbi_flag(sbi, SBI_IS_DIRTY);
1520 clear_sbi_flag(sbi, SBI_NEED_CP);
1521 clear_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
1522
1523 spin_lock(&sbi->stat_lock);
1524 sbi->unusable_block_count = 0;
1525 spin_unlock(&sbi->stat_lock);
1526
1527 __set_cp_next_pack(sbi);
1528
1529 /*
1530 * redirty superblock if metadata like node page or inode cache is
1531 * updated during writing checkpoint.
1532 */
1533 if (get_pages(sbi, F2FS_DIRTY_NODES) ||
1534 get_pages(sbi, F2FS_DIRTY_IMETA))
1535 set_sbi_flag(sbi, SBI_IS_DIRTY);
1536
1537 f2fs_bug_on(sbi, get_pages(sbi, F2FS_DIRTY_DENTS));
1538
1539 return unlikely(f2fs_cp_error(sbi)) ? -EIO : 0;
1540 }
1541
1542 int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
1543 {
1544 struct f2fs_checkpoint *ckpt = F2FS_CKPT(sbi);
1545 unsigned long long ckpt_ver;
1546 int err = 0;
1547
1548 if (f2fs_readonly(sbi->sb) || f2fs_hw_is_readonly(sbi))
1549 return -EROFS;
1550
1551 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
1552 if (cpc->reason != CP_PAUSE)
1553 return 0;
1554 f2fs_warn(sbi, "Start checkpoint disabled!");
1555 }
1556 mutex_lock(&sbi->cp_mutex);
1557
1558 if (!is_sbi_flag_set(sbi, SBI_IS_DIRTY) &&
1559 ((cpc->reason & CP_FASTBOOT) || (cpc->reason & CP_SYNC) ||
1560 ((cpc->reason & CP_DISCARD) && !sbi->discard_blks)))
1561 goto out;
1562 if (unlikely(f2fs_cp_error(sbi))) {
1563 err = -EIO;
1564 goto out;
1565 }
1566
1567 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
1568
1569 err = block_operations(sbi);
1570 if (err)
1571 goto out;
1572
1573 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish block_ops");
1574
1575 f2fs_flush_merged_writes(sbi);
1576
1577 /* this is the case of multiple fstrims without any changes */
1578 if (cpc->reason & CP_DISCARD) {
1579 if (!f2fs_exist_trim_candidates(sbi, cpc)) {
1580 unblock_operations(sbi);
1581 goto out;
1582 }
1583
1584 if (NM_I(sbi)->dirty_nat_cnt == 0 &&
1585 SIT_I(sbi)->dirty_sentries == 0 &&
1586 prefree_segments(sbi) == 0) {
1587 f2fs_flush_sit_entries(sbi, cpc);
1588 f2fs_clear_prefree_segments(sbi, cpc);
1589 unblock_operations(sbi);
1590 goto out;
1591 }
1592 }
1593
1594 /*
1595 * update checkpoint pack index
1596 * Increase the version number so that
1597 * SIT entries and seg summaries are written at correct place
1598 */
1599 ckpt_ver = cur_cp_version(ckpt);
1600 ckpt->checkpoint_ver = cpu_to_le64(++ckpt_ver);
1601
1602 /* write cached NAT/SIT entries to NAT/SIT area */
1603 err = f2fs_flush_nat_entries(sbi, cpc);
1604 if (err)
1605 goto stop;
1606
1607 f2fs_flush_sit_entries(sbi, cpc);
1608
1609 err = do_checkpoint(sbi, cpc);
1610 if (err)
1611 f2fs_release_discard_addrs(sbi);
1612 else
1613 f2fs_clear_prefree_segments(sbi, cpc);
1614 stop:
1615 unblock_operations(sbi);
1616 stat_inc_cp_count(sbi->stat_info);
1617
1618 if (cpc->reason & CP_RECOVERY)
1619 f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
1620
1621 /* update CP_TIME to trigger checkpoint periodically */
1622 f2fs_update_time(sbi, CP_TIME);
1623 trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "finish checkpoint");
1624 out:
1625 mutex_unlock(&sbi->cp_mutex);
1626 return err;
1627 }
1628
1629 void f2fs_init_ino_entry_info(struct f2fs_sb_info *sbi)
1630 {
1631 int i;
1632
1633 for (i = 0; i < MAX_INO_ENTRY; i++) {
1634 struct inode_management *im = &sbi->im[i];
1635
1636 INIT_RADIX_TREE(&im->ino_root, GFP_ATOMIC);
1637 spin_lock_init(&im->ino_lock);
1638 INIT_LIST_HEAD(&im->ino_list);
1639 im->ino_num = 0;
1640 }
1641
1642 sbi->max_orphans = (sbi->blocks_per_seg - F2FS_CP_PACKS -
1643 NR_CURSEG_TYPE - __cp_payload(sbi)) *
1644 F2FS_ORPHANS_PER_BLOCK;
1645 }
1646
1647 int __init f2fs_create_checkpoint_caches(void)
1648 {
1649 ino_entry_slab = f2fs_kmem_cache_create("f2fs_ino_entry",
1650 sizeof(struct ino_entry));
1651 if (!ino_entry_slab)
1652 return -ENOMEM;
1653 f2fs_inode_entry_slab = f2fs_kmem_cache_create("f2fs_inode_entry",
1654 sizeof(struct inode_entry));
1655 if (!f2fs_inode_entry_slab) {
1656 kmem_cache_destroy(ino_entry_slab);
1657 return -ENOMEM;
1658 }
1659 return 0;
1660 }
1661
1662 void f2fs_destroy_checkpoint_caches(void)
1663 {
1664 kmem_cache_destroy(ino_entry_slab);
1665 kmem_cache_destroy(f2fs_inode_entry_slab);
1666 }
Linux with added FPC-III support