4 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
5 * http://www.samsung.com/
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.
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>
24 #include <trace/events/f2fs.h>
26 static struct kmem_cache
*ino_entry_slab
;
27 struct kmem_cache
*inode_entry_slab
;
29 void f2fs_stop_checkpoint(struct f2fs_sb_info
*sbi
, bool end_io
)
31 set_ckpt_flags(sbi
, CP_ERROR_FLAG
);
33 f2fs_flush_merged_writes(sbi
);
37 * We guarantee no failure on the returned page.
39 struct page
*grab_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
41 struct address_space
*mapping
= META_MAPPING(sbi
);
42 struct page
*page
= NULL
;
44 page
= f2fs_grab_cache_page(mapping
, index
, false);
49 f2fs_wait_on_page_writeback(page
, META
, true);
50 if (!PageUptodate(page
))
51 SetPageUptodate(page
);
56 * We guarantee no failure on the returned page.
58 static struct page
*__get_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
,
61 struct address_space
*mapping
= META_MAPPING(sbi
);
63 struct f2fs_io_info fio
= {
67 .op_flags
= REQ_META
| REQ_PRIO
,
70 .encrypted_page
= NULL
,
73 if (unlikely(!is_meta
))
74 fio
.op_flags
&= ~REQ_META
;
76 page
= f2fs_grab_cache_page(mapping
, index
, false);
81 if (PageUptodate(page
))
86 if (f2fs_submit_page_bio(&fio
)) {
87 f2fs_put_page(page
, 1);
92 if (unlikely(page
->mapping
!= mapping
)) {
93 f2fs_put_page(page
, 1);
98 * if there is any IO error when accessing device, make our filesystem
99 * readonly and make sure do not write checkpoint with non-uptodate
102 if (unlikely(!PageUptodate(page
)))
103 f2fs_stop_checkpoint(sbi
, false);
108 struct page
*get_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
110 return __get_meta_page(sbi
, index
, true);
114 struct page
*get_tmp_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
116 return __get_meta_page(sbi
, index
, false);
119 bool is_valid_blkaddr(struct f2fs_sb_info
*sbi
, block_t blkaddr
, int type
)
125 if (unlikely(blkaddr
>= SIT_BLK_CNT(sbi
)))
129 if (unlikely(blkaddr
>= MAIN_BLKADDR(sbi
) ||
130 blkaddr
< SM_I(sbi
)->ssa_blkaddr
))
134 if (unlikely(blkaddr
>= SIT_I(sbi
)->sit_base_addr
||
135 blkaddr
< __start_cp_addr(sbi
)))
139 if (unlikely(blkaddr
>= MAX_BLKADDR(sbi
) ||
140 blkaddr
< MAIN_BLKADDR(sbi
)))
151 * Readahead CP/NAT/SIT/SSA pages
153 int ra_meta_pages(struct f2fs_sb_info
*sbi
, block_t start
, int nrpages
,
157 block_t blkno
= start
;
158 struct f2fs_io_info fio
= {
162 .op_flags
= sync
? (REQ_META
| REQ_PRIO
) : REQ_RAHEAD
,
163 .encrypted_page
= NULL
,
166 struct blk_plug plug
;
168 if (unlikely(type
== META_POR
))
169 fio
.op_flags
&= ~REQ_META
;
171 blk_start_plug(&plug
);
172 for (; nrpages
-- > 0; blkno
++) {
174 if (!is_valid_blkaddr(sbi
, blkno
, type
))
179 if (unlikely(blkno
>=
180 NAT_BLOCK_OFFSET(NM_I(sbi
)->max_nid
)))
182 /* get nat block addr */
183 fio
.new_blkaddr
= current_nat_addr(sbi
,
184 blkno
* NAT_ENTRY_PER_BLOCK
);
187 /* get sit block addr */
188 fio
.new_blkaddr
= current_sit_addr(sbi
,
189 blkno
* SIT_ENTRY_PER_BLOCK
);
194 fio
.new_blkaddr
= blkno
;
200 page
= f2fs_grab_cache_page(META_MAPPING(sbi
),
201 fio
.new_blkaddr
, false);
204 if (PageUptodate(page
)) {
205 f2fs_put_page(page
, 1);
210 f2fs_submit_page_bio(&fio
);
211 f2fs_put_page(page
, 0);
214 blk_finish_plug(&plug
);
215 return blkno
- start
;
218 void ra_meta_pages_cond(struct f2fs_sb_info
*sbi
, pgoff_t index
)
221 bool readahead
= false;
223 page
= find_get_page(META_MAPPING(sbi
), index
);
224 if (!page
|| !PageUptodate(page
))
226 f2fs_put_page(page
, 0);
229 ra_meta_pages(sbi
, index
, BIO_MAX_PAGES
, META_POR
, true);
232 static int __f2fs_write_meta_page(struct page
*page
,
233 struct writeback_control
*wbc
,
234 enum iostat_type io_type
)
236 struct f2fs_sb_info
*sbi
= F2FS_P_SB(page
);
238 trace_f2fs_writepage(page
, META
);
240 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
242 if (wbc
->for_reclaim
&& page
->index
< GET_SUM_BLOCK(sbi
, 0))
244 if (unlikely(f2fs_cp_error(sbi
)))
247 write_meta_page(sbi
, page
, io_type
);
248 dec_page_count(sbi
, F2FS_DIRTY_META
);
250 if (wbc
->for_reclaim
)
251 f2fs_submit_merged_write_cond(sbi
, page
->mapping
->host
,
252 0, page
->index
, META
);
256 if (unlikely(f2fs_cp_error(sbi
)))
257 f2fs_submit_merged_write(sbi
, META
);
262 redirty_page_for_writepage(wbc
, page
);
263 return AOP_WRITEPAGE_ACTIVATE
;
266 static int f2fs_write_meta_page(struct page
*page
,
267 struct writeback_control
*wbc
)
269 return __f2fs_write_meta_page(page
, wbc
, FS_META_IO
);
272 static int f2fs_write_meta_pages(struct address_space
*mapping
,
273 struct writeback_control
*wbc
)
275 struct f2fs_sb_info
*sbi
= F2FS_M_SB(mapping
);
278 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
281 /* collect a number of dirty meta pages and write together */
282 if (wbc
->for_kupdate
||
283 get_pages(sbi
, F2FS_DIRTY_META
) < nr_pages_to_skip(sbi
, META
))
286 /* if locked failed, cp will flush dirty pages instead */
287 if (!mutex_trylock(&sbi
->cp_mutex
))
290 trace_f2fs_writepages(mapping
->host
, wbc
, META
);
291 diff
= nr_pages_to_write(sbi
, META
, wbc
);
292 written
= sync_meta_pages(sbi
, META
, wbc
->nr_to_write
, FS_META_IO
);
293 mutex_unlock(&sbi
->cp_mutex
);
294 wbc
->nr_to_write
= max((long)0, wbc
->nr_to_write
- written
- diff
);
298 wbc
->pages_skipped
+= get_pages(sbi
, F2FS_DIRTY_META
);
299 trace_f2fs_writepages(mapping
->host
, wbc
, META
);
303 long sync_meta_pages(struct f2fs_sb_info
*sbi
, enum page_type type
,
304 long nr_to_write
, enum iostat_type io_type
)
306 struct address_space
*mapping
= META_MAPPING(sbi
);
307 pgoff_t index
= 0, prev
= ULONG_MAX
;
311 struct writeback_control wbc
= {
314 struct blk_plug plug
;
318 blk_start_plug(&plug
);
320 while ((nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &index
,
321 PAGECACHE_TAG_DIRTY
))) {
324 for (i
= 0; i
< nr_pages
; i
++) {
325 struct page
*page
= pvec
.pages
[i
];
327 if (prev
== ULONG_MAX
)
328 prev
= page
->index
- 1;
329 if (nr_to_write
!= LONG_MAX
&& page
->index
!= prev
+ 1) {
330 pagevec_release(&pvec
);
336 if (unlikely(page
->mapping
!= mapping
)) {
341 if (!PageDirty(page
)) {
342 /* someone wrote it for us */
343 goto continue_unlock
;
346 f2fs_wait_on_page_writeback(page
, META
, true);
348 BUG_ON(PageWriteback(page
));
349 if (!clear_page_dirty_for_io(page
))
350 goto continue_unlock
;
352 if (__f2fs_write_meta_page(page
, &wbc
, io_type
)) {
358 if (unlikely(nwritten
>= nr_to_write
))
361 pagevec_release(&pvec
);
366 f2fs_submit_merged_write(sbi
, type
);
368 blk_finish_plug(&plug
);
373 static int f2fs_set_meta_page_dirty(struct page
*page
)
375 trace_f2fs_set_page_dirty(page
, META
);
377 if (!PageUptodate(page
))
378 SetPageUptodate(page
);
379 if (!PageDirty(page
)) {
380 f2fs_set_page_dirty_nobuffers(page
);
381 inc_page_count(F2FS_P_SB(page
), F2FS_DIRTY_META
);
382 SetPagePrivate(page
);
383 f2fs_trace_pid(page
);
389 const struct address_space_operations f2fs_meta_aops
= {
390 .writepage
= f2fs_write_meta_page
,
391 .writepages
= f2fs_write_meta_pages
,
392 .set_page_dirty
= f2fs_set_meta_page_dirty
,
393 .invalidatepage
= f2fs_invalidate_page
,
394 .releasepage
= f2fs_release_page
,
395 #ifdef CONFIG_MIGRATION
396 .migratepage
= f2fs_migrate_page
,
400 static void __add_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
,
401 unsigned int devidx
, int type
)
403 struct inode_management
*im
= &sbi
->im
[type
];
404 struct ino_entry
*e
, *tmp
;
406 tmp
= f2fs_kmem_cache_alloc(ino_entry_slab
, GFP_NOFS
);
408 radix_tree_preload(GFP_NOFS
| __GFP_NOFAIL
);
410 spin_lock(&im
->ino_lock
);
411 e
= radix_tree_lookup(&im
->ino_root
, ino
);
414 if (unlikely(radix_tree_insert(&im
->ino_root
, ino
, e
)))
417 memset(e
, 0, sizeof(struct ino_entry
));
420 list_add_tail(&e
->list
, &im
->ino_list
);
421 if (type
!= ORPHAN_INO
)
425 if (type
== FLUSH_INO
)
426 f2fs_set_bit(devidx
, (char *)&e
->dirty_device
);
428 spin_unlock(&im
->ino_lock
);
429 radix_tree_preload_end();
432 kmem_cache_free(ino_entry_slab
, tmp
);
435 static void __remove_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
437 struct inode_management
*im
= &sbi
->im
[type
];
440 spin_lock(&im
->ino_lock
);
441 e
= radix_tree_lookup(&im
->ino_root
, ino
);
444 radix_tree_delete(&im
->ino_root
, ino
);
446 spin_unlock(&im
->ino_lock
);
447 kmem_cache_free(ino_entry_slab
, e
);
450 spin_unlock(&im
->ino_lock
);
453 void add_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
455 /* add new dirty ino entry into list */
456 __add_ino_entry(sbi
, ino
, 0, type
);
459 void remove_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
461 /* remove dirty ino entry from list */
462 __remove_ino_entry(sbi
, ino
, type
);
465 /* mode should be APPEND_INO or UPDATE_INO */
466 bool exist_written_data(struct f2fs_sb_info
*sbi
, nid_t ino
, int mode
)
468 struct inode_management
*im
= &sbi
->im
[mode
];
471 spin_lock(&im
->ino_lock
);
472 e
= radix_tree_lookup(&im
->ino_root
, ino
);
473 spin_unlock(&im
->ino_lock
);
474 return e
? true : false;
477 void release_ino_entry(struct f2fs_sb_info
*sbi
, bool all
)
479 struct ino_entry
*e
, *tmp
;
482 for (i
= all
? ORPHAN_INO
: APPEND_INO
; i
< MAX_INO_ENTRY
; i
++) {
483 struct inode_management
*im
= &sbi
->im
[i
];
485 spin_lock(&im
->ino_lock
);
486 list_for_each_entry_safe(e
, tmp
, &im
->ino_list
, list
) {
488 radix_tree_delete(&im
->ino_root
, e
->ino
);
489 kmem_cache_free(ino_entry_slab
, e
);
492 spin_unlock(&im
->ino_lock
);
496 void set_dirty_device(struct f2fs_sb_info
*sbi
, nid_t ino
,
497 unsigned int devidx
, int type
)
499 __add_ino_entry(sbi
, ino
, devidx
, type
);
502 bool is_dirty_device(struct f2fs_sb_info
*sbi
, nid_t ino
,
503 unsigned int devidx
, int type
)
505 struct inode_management
*im
= &sbi
->im
[type
];
507 bool is_dirty
= false;
509 spin_lock(&im
->ino_lock
);
510 e
= radix_tree_lookup(&im
->ino_root
, ino
);
511 if (e
&& f2fs_test_bit(devidx
, (char *)&e
->dirty_device
))
513 spin_unlock(&im
->ino_lock
);
517 int acquire_orphan_inode(struct f2fs_sb_info
*sbi
)
519 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
522 spin_lock(&im
->ino_lock
);
524 #ifdef CONFIG_F2FS_FAULT_INJECTION
525 if (time_to_inject(sbi
, FAULT_ORPHAN
)) {
526 spin_unlock(&im
->ino_lock
);
527 f2fs_show_injection_info(FAULT_ORPHAN
);
531 if (unlikely(im
->ino_num
>= sbi
->max_orphans
))
535 spin_unlock(&im
->ino_lock
);
540 void release_orphan_inode(struct f2fs_sb_info
*sbi
)
542 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
544 spin_lock(&im
->ino_lock
);
545 f2fs_bug_on(sbi
, im
->ino_num
== 0);
547 spin_unlock(&im
->ino_lock
);
550 void add_orphan_inode(struct inode
*inode
)
552 /* add new orphan ino entry into list */
553 __add_ino_entry(F2FS_I_SB(inode
), inode
->i_ino
, 0, ORPHAN_INO
);
554 update_inode_page(inode
);
557 void remove_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
559 /* remove orphan entry from orphan list */
560 __remove_ino_entry(sbi
, ino
, ORPHAN_INO
);
563 static int recover_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
567 int err
= acquire_orphan_inode(sbi
);
570 set_sbi_flag(sbi
, SBI_NEED_FSCK
);
571 f2fs_msg(sbi
->sb
, KERN_WARNING
,
572 "%s: orphan failed (ino=%x), run fsck to fix.",
577 __add_ino_entry(sbi
, ino
, 0, ORPHAN_INO
);
579 inode
= f2fs_iget_retry(sbi
->sb
, ino
);
582 * there should be a bug that we can't find the entry
585 f2fs_bug_on(sbi
, PTR_ERR(inode
) == -ENOENT
);
586 return PTR_ERR(inode
);
591 /* truncate all the data during iput */
594 get_node_info(sbi
, ino
, &ni
);
596 /* ENOMEM was fully retried in f2fs_evict_inode. */
597 if (ni
.blk_addr
!= NULL_ADDR
) {
598 set_sbi_flag(sbi
, SBI_NEED_FSCK
);
599 f2fs_msg(sbi
->sb
, KERN_WARNING
,
600 "%s: orphan failed (ino=%x) by kernel, retry mount.",
604 __remove_ino_entry(sbi
, ino
, ORPHAN_INO
);
608 int recover_orphan_inodes(struct f2fs_sb_info
*sbi
)
610 block_t start_blk
, orphan_blocks
, i
, j
;
611 unsigned int s_flags
= sbi
->sb
->s_flags
;
617 if (!is_set_ckpt_flags(sbi
, CP_ORPHAN_PRESENT_FLAG
))
620 if (s_flags
& MS_RDONLY
) {
621 f2fs_msg(sbi
->sb
, KERN_INFO
, "orphan cleanup on readonly fs");
622 sbi
->sb
->s_flags
&= ~MS_RDONLY
;
626 /* Needed for iput() to work correctly and not trash data */
627 sbi
->sb
->s_flags
|= MS_ACTIVE
;
629 /* Turn on quotas so that they are updated correctly */
630 quota_enabled
= f2fs_enable_quota_files(sbi
, s_flags
& MS_RDONLY
);
633 start_blk
= __start_cp_addr(sbi
) + 1 + __cp_payload(sbi
);
634 orphan_blocks
= __start_sum_addr(sbi
) - 1 - __cp_payload(sbi
);
636 ra_meta_pages(sbi
, start_blk
, orphan_blocks
, META_CP
, true);
638 for (i
= 0; i
< orphan_blocks
; i
++) {
639 struct page
*page
= get_meta_page(sbi
, start_blk
+ i
);
640 struct f2fs_orphan_block
*orphan_blk
;
642 orphan_blk
= (struct f2fs_orphan_block
*)page_address(page
);
643 for (j
= 0; j
< le32_to_cpu(orphan_blk
->entry_count
); j
++) {
644 nid_t ino
= le32_to_cpu(orphan_blk
->ino
[j
]);
645 err
= recover_orphan_inode(sbi
, ino
);
647 f2fs_put_page(page
, 1);
651 f2fs_put_page(page
, 1);
653 /* clear Orphan Flag */
654 clear_ckpt_flags(sbi
, CP_ORPHAN_PRESENT_FLAG
);
657 /* Turn quotas off */
659 f2fs_quota_off_umount(sbi
->sb
);
661 sbi
->sb
->s_flags
= s_flags
; /* Restore MS_RDONLY status */
666 static void write_orphan_inodes(struct f2fs_sb_info
*sbi
, block_t start_blk
)
668 struct list_head
*head
;
669 struct f2fs_orphan_block
*orphan_blk
= NULL
;
670 unsigned int nentries
= 0;
671 unsigned short index
= 1;
672 unsigned short orphan_blocks
;
673 struct page
*page
= NULL
;
674 struct ino_entry
*orphan
= NULL
;
675 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
677 orphan_blocks
= GET_ORPHAN_BLOCKS(im
->ino_num
);
680 * we don't need to do spin_lock(&im->ino_lock) here, since all the
681 * orphan inode operations are covered under f2fs_lock_op().
682 * And, spin_lock should be avoided due to page operations below.
684 head
= &im
->ino_list
;
686 /* loop for each orphan inode entry and write them in Jornal block */
687 list_for_each_entry(orphan
, head
, list
) {
689 page
= grab_meta_page(sbi
, start_blk
++);
691 (struct f2fs_orphan_block
*)page_address(page
);
692 memset(orphan_blk
, 0, sizeof(*orphan_blk
));
695 orphan_blk
->ino
[nentries
++] = cpu_to_le32(orphan
->ino
);
697 if (nentries
== F2FS_ORPHANS_PER_BLOCK
) {
699 * an orphan block is full of 1020 entries,
700 * then we need to flush current orphan blocks
701 * and bring another one in memory
703 orphan_blk
->blk_addr
= cpu_to_le16(index
);
704 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
705 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
706 set_page_dirty(page
);
707 f2fs_put_page(page
, 1);
715 orphan_blk
->blk_addr
= cpu_to_le16(index
);
716 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
717 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
718 set_page_dirty(page
);
719 f2fs_put_page(page
, 1);
723 static int get_checkpoint_version(struct f2fs_sb_info
*sbi
, block_t cp_addr
,
724 struct f2fs_checkpoint
**cp_block
, struct page
**cp_page
,
725 unsigned long long *version
)
727 unsigned long blk_size
= sbi
->blocksize
;
728 size_t crc_offset
= 0;
731 *cp_page
= get_meta_page(sbi
, cp_addr
);
732 *cp_block
= (struct f2fs_checkpoint
*)page_address(*cp_page
);
734 crc_offset
= le32_to_cpu((*cp_block
)->checksum_offset
);
735 if (crc_offset
> (blk_size
- sizeof(__le32
))) {
736 f2fs_msg(sbi
->sb
, KERN_WARNING
,
737 "invalid crc_offset: %zu", crc_offset
);
741 crc
= cur_cp_crc(*cp_block
);
742 if (!f2fs_crc_valid(sbi
, crc
, *cp_block
, crc_offset
)) {
743 f2fs_msg(sbi
->sb
, KERN_WARNING
, "invalid crc value");
747 *version
= cur_cp_version(*cp_block
);
751 static struct page
*validate_checkpoint(struct f2fs_sb_info
*sbi
,
752 block_t cp_addr
, unsigned long long *version
)
754 struct page
*cp_page_1
= NULL
, *cp_page_2
= NULL
;
755 struct f2fs_checkpoint
*cp_block
= NULL
;
756 unsigned long long cur_version
= 0, pre_version
= 0;
759 err
= get_checkpoint_version(sbi
, cp_addr
, &cp_block
,
760 &cp_page_1
, version
);
763 pre_version
= *version
;
765 cp_addr
+= le32_to_cpu(cp_block
->cp_pack_total_block_count
) - 1;
766 err
= get_checkpoint_version(sbi
, cp_addr
, &cp_block
,
767 &cp_page_2
, version
);
770 cur_version
= *version
;
772 if (cur_version
== pre_version
) {
773 *version
= cur_version
;
774 f2fs_put_page(cp_page_2
, 1);
778 f2fs_put_page(cp_page_2
, 1);
780 f2fs_put_page(cp_page_1
, 1);
784 int get_valid_checkpoint(struct f2fs_sb_info
*sbi
)
786 struct f2fs_checkpoint
*cp_block
;
787 struct f2fs_super_block
*fsb
= sbi
->raw_super
;
788 struct page
*cp1
, *cp2
, *cur_page
;
789 unsigned long blk_size
= sbi
->blocksize
;
790 unsigned long long cp1_version
= 0, cp2_version
= 0;
791 unsigned long long cp_start_blk_no
;
792 unsigned int cp_blks
= 1 + __cp_payload(sbi
);
796 sbi
->ckpt
= kzalloc(cp_blks
* blk_size
, GFP_KERNEL
);
800 * Finding out valid cp block involves read both
801 * sets( cp pack1 and cp pack 2)
803 cp_start_blk_no
= le32_to_cpu(fsb
->cp_blkaddr
);
804 cp1
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp1_version
);
806 /* The second checkpoint pack should start at the next segment */
807 cp_start_blk_no
+= ((unsigned long long)1) <<
808 le32_to_cpu(fsb
->log_blocks_per_seg
);
809 cp2
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp2_version
);
812 if (ver_after(cp2_version
, cp1_version
))
824 cp_block
= (struct f2fs_checkpoint
*)page_address(cur_page
);
825 memcpy(sbi
->ckpt
, cp_block
, blk_size
);
827 /* Sanity checking of checkpoint */
828 if (sanity_check_ckpt(sbi
))
829 goto free_fail_no_cp
;
832 sbi
->cur_cp_pack
= 1;
834 sbi
->cur_cp_pack
= 2;
839 cp_blk_no
= le32_to_cpu(fsb
->cp_blkaddr
);
841 cp_blk_no
+= 1 << le32_to_cpu(fsb
->log_blocks_per_seg
);
843 for (i
= 1; i
< cp_blks
; i
++) {
844 void *sit_bitmap_ptr
;
845 unsigned char *ckpt
= (unsigned char *)sbi
->ckpt
;
847 cur_page
= get_meta_page(sbi
, cp_blk_no
+ i
);
848 sit_bitmap_ptr
= page_address(cur_page
);
849 memcpy(ckpt
+ i
* blk_size
, sit_bitmap_ptr
, blk_size
);
850 f2fs_put_page(cur_page
, 1);
853 f2fs_put_page(cp1
, 1);
854 f2fs_put_page(cp2
, 1);
858 f2fs_put_page(cp1
, 1);
859 f2fs_put_page(cp2
, 1);
865 static void __add_dirty_inode(struct inode
*inode
, enum inode_type type
)
867 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
868 int flag
= (type
== DIR_INODE
) ? FI_DIRTY_DIR
: FI_DIRTY_FILE
;
870 if (is_inode_flag_set(inode
, flag
))
873 set_inode_flag(inode
, flag
);
874 if (!f2fs_is_volatile_file(inode
))
875 list_add_tail(&F2FS_I(inode
)->dirty_list
,
876 &sbi
->inode_list
[type
]);
877 stat_inc_dirty_inode(sbi
, type
);
880 static void __remove_dirty_inode(struct inode
*inode
, enum inode_type type
)
882 int flag
= (type
== DIR_INODE
) ? FI_DIRTY_DIR
: FI_DIRTY_FILE
;
884 if (get_dirty_pages(inode
) || !is_inode_flag_set(inode
, flag
))
887 list_del_init(&F2FS_I(inode
)->dirty_list
);
888 clear_inode_flag(inode
, flag
);
889 stat_dec_dirty_inode(F2FS_I_SB(inode
), type
);
892 void update_dirty_page(struct inode
*inode
, struct page
*page
)
894 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
895 enum inode_type type
= S_ISDIR(inode
->i_mode
) ? DIR_INODE
: FILE_INODE
;
897 if (!S_ISDIR(inode
->i_mode
) && !S_ISREG(inode
->i_mode
) &&
898 !S_ISLNK(inode
->i_mode
))
901 spin_lock(&sbi
->inode_lock
[type
]);
902 if (type
!= FILE_INODE
|| test_opt(sbi
, DATA_FLUSH
))
903 __add_dirty_inode(inode
, type
);
904 inode_inc_dirty_pages(inode
);
905 spin_unlock(&sbi
->inode_lock
[type
]);
907 SetPagePrivate(page
);
908 f2fs_trace_pid(page
);
911 void remove_dirty_inode(struct inode
*inode
)
913 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
914 enum inode_type type
= S_ISDIR(inode
->i_mode
) ? DIR_INODE
: FILE_INODE
;
916 if (!S_ISDIR(inode
->i_mode
) && !S_ISREG(inode
->i_mode
) &&
917 !S_ISLNK(inode
->i_mode
))
920 if (type
== FILE_INODE
&& !test_opt(sbi
, DATA_FLUSH
))
923 spin_lock(&sbi
->inode_lock
[type
]);
924 __remove_dirty_inode(inode
, type
);
925 spin_unlock(&sbi
->inode_lock
[type
]);
928 int sync_dirty_inodes(struct f2fs_sb_info
*sbi
, enum inode_type type
)
930 struct list_head
*head
;
932 struct f2fs_inode_info
*fi
;
933 bool is_dir
= (type
== DIR_INODE
);
934 unsigned long ino
= 0;
936 trace_f2fs_sync_dirty_inodes_enter(sbi
->sb
, is_dir
,
937 get_pages(sbi
, is_dir
?
938 F2FS_DIRTY_DENTS
: F2FS_DIRTY_DATA
));
940 if (unlikely(f2fs_cp_error(sbi
)))
943 spin_lock(&sbi
->inode_lock
[type
]);
945 head
= &sbi
->inode_list
[type
];
946 if (list_empty(head
)) {
947 spin_unlock(&sbi
->inode_lock
[type
]);
948 trace_f2fs_sync_dirty_inodes_exit(sbi
->sb
, is_dir
,
949 get_pages(sbi
, is_dir
?
950 F2FS_DIRTY_DENTS
: F2FS_DIRTY_DATA
));
953 fi
= list_first_entry(head
, struct f2fs_inode_info
, dirty_list
);
954 inode
= igrab(&fi
->vfs_inode
);
955 spin_unlock(&sbi
->inode_lock
[type
]);
957 unsigned long cur_ino
= inode
->i_ino
;
960 F2FS_I(inode
)->cp_task
= current
;
962 filemap_fdatawrite(inode
->i_mapping
);
965 F2FS_I(inode
)->cp_task
= NULL
;
968 /* We need to give cpu to another writers. */
969 if (ino
== cur_ino
) {
970 congestion_wait(BLK_RW_ASYNC
, HZ
/50);
977 * We should submit bio, since it exists several
978 * wribacking dentry pages in the freeing inode.
980 f2fs_submit_merged_write(sbi
, DATA
);
986 int f2fs_sync_inode_meta(struct f2fs_sb_info
*sbi
)
988 struct list_head
*head
= &sbi
->inode_list
[DIRTY_META
];
990 struct f2fs_inode_info
*fi
;
991 s64 total
= get_pages(sbi
, F2FS_DIRTY_IMETA
);
994 if (unlikely(f2fs_cp_error(sbi
)))
997 spin_lock(&sbi
->inode_lock
[DIRTY_META
]);
998 if (list_empty(head
)) {
999 spin_unlock(&sbi
->inode_lock
[DIRTY_META
]);
1002 fi
= list_first_entry(head
, struct f2fs_inode_info
,
1004 inode
= igrab(&fi
->vfs_inode
);
1005 spin_unlock(&sbi
->inode_lock
[DIRTY_META
]);
1007 sync_inode_metadata(inode
, 0);
1009 /* it's on eviction */
1010 if (is_inode_flag_set(inode
, FI_DIRTY_INODE
))
1011 update_inode_page(inode
);
1018 static void __prepare_cp_block(struct f2fs_sb_info
*sbi
)
1020 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
1021 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1022 nid_t last_nid
= nm_i
->next_scan_nid
;
1024 next_free_nid(sbi
, &last_nid
);
1025 ckpt
->valid_block_count
= cpu_to_le64(valid_user_blocks(sbi
));
1026 ckpt
->valid_node_count
= cpu_to_le32(valid_node_count(sbi
));
1027 ckpt
->valid_inode_count
= cpu_to_le32(valid_inode_count(sbi
));
1028 ckpt
->next_free_nid
= cpu_to_le32(last_nid
);
1032 * Freeze all the FS-operations for checkpoint.
1034 static int block_operations(struct f2fs_sb_info
*sbi
)
1036 struct writeback_control wbc
= {
1037 .sync_mode
= WB_SYNC_ALL
,
1038 .nr_to_write
= LONG_MAX
,
1041 struct blk_plug plug
;
1044 blk_start_plug(&plug
);
1048 /* write all the dirty dentry pages */
1049 if (get_pages(sbi
, F2FS_DIRTY_DENTS
)) {
1050 f2fs_unlock_all(sbi
);
1051 err
= sync_dirty_inodes(sbi
, DIR_INODE
);
1055 goto retry_flush_dents
;
1059 * POR: we should ensure that there are no dirty node pages
1060 * until finishing nat/sit flush. inode->i_blocks can be updated.
1062 down_write(&sbi
->node_change
);
1064 if (get_pages(sbi
, F2FS_DIRTY_IMETA
)) {
1065 up_write(&sbi
->node_change
);
1066 f2fs_unlock_all(sbi
);
1067 err
= f2fs_sync_inode_meta(sbi
);
1071 goto retry_flush_dents
;
1075 down_write(&sbi
->node_write
);
1077 if (get_pages(sbi
, F2FS_DIRTY_NODES
)) {
1078 up_write(&sbi
->node_write
);
1079 err
= sync_node_pages(sbi
, &wbc
, false, FS_CP_NODE_IO
);
1081 up_write(&sbi
->node_change
);
1082 f2fs_unlock_all(sbi
);
1086 goto retry_flush_nodes
;
1090 * sbi->node_change is used only for AIO write_begin path which produces
1091 * dirty node blocks and some checkpoint values by block allocation.
1093 __prepare_cp_block(sbi
);
1094 up_write(&sbi
->node_change
);
1096 blk_finish_plug(&plug
);
1100 static void unblock_operations(struct f2fs_sb_info
*sbi
)
1102 up_write(&sbi
->node_write
);
1103 f2fs_unlock_all(sbi
);
1106 static void wait_on_all_pages_writeback(struct f2fs_sb_info
*sbi
)
1111 prepare_to_wait(&sbi
->cp_wait
, &wait
, TASK_UNINTERRUPTIBLE
);
1113 if (!get_pages(sbi
, F2FS_WB_CP_DATA
))
1116 io_schedule_timeout(5*HZ
);
1118 finish_wait(&sbi
->cp_wait
, &wait
);
1121 static void update_ckpt_flags(struct f2fs_sb_info
*sbi
, struct cp_control
*cpc
)
1123 unsigned long orphan_num
= sbi
->im
[ORPHAN_INO
].ino_num
;
1124 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
1125 unsigned long flags
;
1127 spin_lock_irqsave(&sbi
->cp_lock
, flags
);
1129 if ((cpc
->reason
& CP_UMOUNT
) &&
1130 le32_to_cpu(ckpt
->cp_pack_total_block_count
) >
1131 sbi
->blocks_per_seg
- NM_I(sbi
)->nat_bits_blocks
)
1132 disable_nat_bits(sbi
, false);
1134 if (cpc
->reason
& CP_TRIMMED
)
1135 __set_ckpt_flags(ckpt
, CP_TRIMMED_FLAG
);
1137 if (cpc
->reason
& CP_UMOUNT
)
1138 __set_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
1140 __clear_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
1142 if (cpc
->reason
& CP_FASTBOOT
)
1143 __set_ckpt_flags(ckpt
, CP_FASTBOOT_FLAG
);
1145 __clear_ckpt_flags(ckpt
, CP_FASTBOOT_FLAG
);
1148 __set_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
1150 __clear_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
1152 if (is_sbi_flag_set(sbi
, SBI_NEED_FSCK
))
1153 __set_ckpt_flags(ckpt
, CP_FSCK_FLAG
);
1155 /* set this flag to activate crc|cp_ver for recovery */
1156 __set_ckpt_flags(ckpt
, CP_CRC_RECOVERY_FLAG
);
1158 spin_unlock_irqrestore(&sbi
->cp_lock
, flags
);
1161 static int do_checkpoint(struct f2fs_sb_info
*sbi
, struct cp_control
*cpc
)
1163 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
1164 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
1165 unsigned long orphan_num
= sbi
->im
[ORPHAN_INO
].ino_num
, flags
;
1167 unsigned int data_sum_blocks
, orphan_blocks
;
1170 int cp_payload_blks
= __cp_payload(sbi
);
1171 struct super_block
*sb
= sbi
->sb
;
1172 struct curseg_info
*seg_i
= CURSEG_I(sbi
, CURSEG_HOT_NODE
);
1176 /* Flush all the NAT/SIT pages */
1177 while (get_pages(sbi
, F2FS_DIRTY_META
)) {
1178 sync_meta_pages(sbi
, META
, LONG_MAX
, FS_CP_META_IO
);
1179 if (unlikely(f2fs_cp_error(sbi
)))
1185 * version number is already updated
1187 ckpt
->elapsed_time
= cpu_to_le64(get_mtime(sbi
));
1188 ckpt
->free_segment_count
= cpu_to_le32(free_segments(sbi
));
1189 for (i
= 0; i
< NR_CURSEG_NODE_TYPE
; i
++) {
1190 ckpt
->cur_node_segno
[i
] =
1191 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_NODE
));
1192 ckpt
->cur_node_blkoff
[i
] =
1193 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_NODE
));
1194 ckpt
->alloc_type
[i
+ CURSEG_HOT_NODE
] =
1195 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_NODE
);
1197 for (i
= 0; i
< NR_CURSEG_DATA_TYPE
; i
++) {
1198 ckpt
->cur_data_segno
[i
] =
1199 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_DATA
));
1200 ckpt
->cur_data_blkoff
[i
] =
1201 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_DATA
));
1202 ckpt
->alloc_type
[i
+ CURSEG_HOT_DATA
] =
1203 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_DATA
);
1206 /* 2 cp + n data seg summary + orphan inode blocks */
1207 data_sum_blocks
= npages_for_summary_flush(sbi
, false);
1208 spin_lock_irqsave(&sbi
->cp_lock
, flags
);
1209 if (data_sum_blocks
< NR_CURSEG_DATA_TYPE
)
1210 __set_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
1212 __clear_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
1213 spin_unlock_irqrestore(&sbi
->cp_lock
, flags
);
1215 orphan_blocks
= GET_ORPHAN_BLOCKS(orphan_num
);
1216 ckpt
->cp_pack_start_sum
= cpu_to_le32(1 + cp_payload_blks
+
1219 if (__remain_node_summaries(cpc
->reason
))
1220 ckpt
->cp_pack_total_block_count
= cpu_to_le32(F2FS_CP_PACKS
+
1221 cp_payload_blks
+ data_sum_blocks
+
1222 orphan_blocks
+ NR_CURSEG_NODE_TYPE
);
1224 ckpt
->cp_pack_total_block_count
= cpu_to_le32(F2FS_CP_PACKS
+
1225 cp_payload_blks
+ data_sum_blocks
+
1228 /* update ckpt flag for checkpoint */
1229 update_ckpt_flags(sbi
, cpc
);
1231 /* update SIT/NAT bitmap */
1232 get_sit_bitmap(sbi
, __bitmap_ptr(sbi
, SIT_BITMAP
));
1233 get_nat_bitmap(sbi
, __bitmap_ptr(sbi
, NAT_BITMAP
));
1235 crc32
= f2fs_crc32(sbi
, ckpt
, le32_to_cpu(ckpt
->checksum_offset
));
1236 *((__le32
*)((unsigned char *)ckpt
+
1237 le32_to_cpu(ckpt
->checksum_offset
)))
1238 = cpu_to_le32(crc32
);
1240 start_blk
= __start_cp_next_addr(sbi
);
1242 /* write nat bits */
1243 if (enabled_nat_bits(sbi
, cpc
)) {
1244 __u64 cp_ver
= cur_cp_version(ckpt
);
1247 cp_ver
|= ((__u64
)crc32
<< 32);
1248 *(__le64
*)nm_i
->nat_bits
= cpu_to_le64(cp_ver
);
1250 blk
= start_blk
+ sbi
->blocks_per_seg
- nm_i
->nat_bits_blocks
;
1251 for (i
= 0; i
< nm_i
->nat_bits_blocks
; i
++)
1252 update_meta_page(sbi
, nm_i
->nat_bits
+
1253 (i
<< F2FS_BLKSIZE_BITS
), blk
+ i
);
1255 /* Flush all the NAT BITS pages */
1256 while (get_pages(sbi
, F2FS_DIRTY_META
)) {
1257 sync_meta_pages(sbi
, META
, LONG_MAX
, FS_CP_META_IO
);
1258 if (unlikely(f2fs_cp_error(sbi
)))
1263 /* need to wait for end_io results */
1264 wait_on_all_pages_writeback(sbi
);
1265 if (unlikely(f2fs_cp_error(sbi
)))
1268 /* flush all device cache */
1269 err
= f2fs_flush_device_cache(sbi
);
1273 /* write out checkpoint buffer at block 0 */
1274 update_meta_page(sbi
, ckpt
, start_blk
++);
1276 for (i
= 1; i
< 1 + cp_payload_blks
; i
++)
1277 update_meta_page(sbi
, (char *)ckpt
+ i
* F2FS_BLKSIZE
,
1281 write_orphan_inodes(sbi
, start_blk
);
1282 start_blk
+= orphan_blocks
;
1285 write_data_summaries(sbi
, start_blk
);
1286 start_blk
+= data_sum_blocks
;
1288 /* Record write statistics in the hot node summary */
1289 kbytes_written
= sbi
->kbytes_written
;
1290 if (sb
->s_bdev
->bd_part
)
1291 kbytes_written
+= BD_PART_WRITTEN(sbi
);
1293 seg_i
->journal
->info
.kbytes_written
= cpu_to_le64(kbytes_written
);
1295 if (__remain_node_summaries(cpc
->reason
)) {
1296 write_node_summaries(sbi
, start_blk
);
1297 start_blk
+= NR_CURSEG_NODE_TYPE
;
1300 /* writeout checkpoint block */
1301 update_meta_page(sbi
, ckpt
, start_blk
);
1303 /* wait for previous submitted node/meta pages writeback */
1304 wait_on_all_pages_writeback(sbi
);
1306 if (unlikely(f2fs_cp_error(sbi
)))
1309 filemap_fdatawait_range(NODE_MAPPING(sbi
), 0, LLONG_MAX
);
1310 filemap_fdatawait_range(META_MAPPING(sbi
), 0, LLONG_MAX
);
1312 /* update user_block_counts */
1313 sbi
->last_valid_block_count
= sbi
->total_valid_block_count
;
1314 percpu_counter_set(&sbi
->alloc_valid_block_count
, 0);
1316 /* Here, we only have one bio having CP pack */
1317 sync_meta_pages(sbi
, META_FLUSH
, LONG_MAX
, FS_CP_META_IO
);
1319 /* wait for previous submitted meta pages writeback */
1320 wait_on_all_pages_writeback(sbi
);
1322 release_ino_entry(sbi
, false);
1324 if (unlikely(f2fs_cp_error(sbi
)))
1327 clear_sbi_flag(sbi
, SBI_IS_DIRTY
);
1328 clear_sbi_flag(sbi
, SBI_NEED_CP
);
1329 __set_cp_next_pack(sbi
);
1332 * redirty superblock if metadata like node page or inode cache is
1333 * updated during writing checkpoint.
1335 if (get_pages(sbi
, F2FS_DIRTY_NODES
) ||
1336 get_pages(sbi
, F2FS_DIRTY_IMETA
))
1337 set_sbi_flag(sbi
, SBI_IS_DIRTY
);
1339 f2fs_bug_on(sbi
, get_pages(sbi
, F2FS_DIRTY_DENTS
));
1345 * We guarantee that this checkpoint procedure will not fail.
1347 int write_checkpoint(struct f2fs_sb_info
*sbi
, struct cp_control
*cpc
)
1349 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
1350 unsigned long long ckpt_ver
;
1353 mutex_lock(&sbi
->cp_mutex
);
1355 if (!is_sbi_flag_set(sbi
, SBI_IS_DIRTY
) &&
1356 ((cpc
->reason
& CP_FASTBOOT
) || (cpc
->reason
& CP_SYNC
) ||
1357 ((cpc
->reason
& CP_DISCARD
) && !sbi
->discard_blks
)))
1359 if (unlikely(f2fs_cp_error(sbi
))) {
1363 if (f2fs_readonly(sbi
->sb
)) {
1368 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "start block_ops");
1370 err
= block_operations(sbi
);
1374 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "finish block_ops");
1376 f2fs_flush_merged_writes(sbi
);
1378 /* this is the case of multiple fstrims without any changes */
1379 if (cpc
->reason
& CP_DISCARD
) {
1380 if (!exist_trim_candidates(sbi
, cpc
)) {
1381 unblock_operations(sbi
);
1385 if (NM_I(sbi
)->dirty_nat_cnt
== 0 &&
1386 SIT_I(sbi
)->dirty_sentries
== 0 &&
1387 prefree_segments(sbi
) == 0) {
1388 flush_sit_entries(sbi
, cpc
);
1389 clear_prefree_segments(sbi
, cpc
);
1390 unblock_operations(sbi
);
1396 * update checkpoint pack index
1397 * Increase the version number so that
1398 * SIT entries and seg summaries are written at correct place
1400 ckpt_ver
= cur_cp_version(ckpt
);
1401 ckpt
->checkpoint_ver
= cpu_to_le64(++ckpt_ver
);
1403 /* write cached NAT/SIT entries to NAT/SIT area */
1404 flush_nat_entries(sbi
, cpc
);
1405 flush_sit_entries(sbi
, cpc
);
1407 /* unlock all the fs_lock[] in do_checkpoint() */
1408 err
= do_checkpoint(sbi
, cpc
);
1410 release_discard_addrs(sbi
);
1412 clear_prefree_segments(sbi
, cpc
);
1414 unblock_operations(sbi
);
1415 stat_inc_cp_count(sbi
->stat_info
);
1417 if (cpc
->reason
& CP_RECOVERY
)
1418 f2fs_msg(sbi
->sb
, KERN_NOTICE
,
1419 "checkpoint: version = %llx", ckpt_ver
);
1421 /* do checkpoint periodically */
1422 f2fs_update_time(sbi
, CP_TIME
);
1423 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "finish checkpoint");
1425 mutex_unlock(&sbi
->cp_mutex
);
1429 void init_ino_entry_info(struct f2fs_sb_info
*sbi
)
1433 for (i
= 0; i
< MAX_INO_ENTRY
; i
++) {
1434 struct inode_management
*im
= &sbi
->im
[i
];
1436 INIT_RADIX_TREE(&im
->ino_root
, GFP_ATOMIC
);
1437 spin_lock_init(&im
->ino_lock
);
1438 INIT_LIST_HEAD(&im
->ino_list
);
1442 sbi
->max_orphans
= (sbi
->blocks_per_seg
- F2FS_CP_PACKS
-
1443 NR_CURSEG_TYPE
- __cp_payload(sbi
)) *
1444 F2FS_ORPHANS_PER_BLOCK
;
1447 int __init
create_checkpoint_caches(void)
1449 ino_entry_slab
= f2fs_kmem_cache_create("f2fs_ino_entry",
1450 sizeof(struct ino_entry
));
1451 if (!ino_entry_slab
)
1453 inode_entry_slab
= f2fs_kmem_cache_create("f2fs_inode_entry",
1454 sizeof(struct inode_entry
));
1455 if (!inode_entry_slab
) {
1456 kmem_cache_destroy(ino_entry_slab
);
1462 void destroy_checkpoint_caches(void)
1464 kmem_cache_destroy(ino_entry_slab
);
1465 kmem_cache_destroy(inode_entry_slab
);