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>
23 #include <trace/events/f2fs.h>
25 static struct kmem_cache
*orphan_entry_slab
;
26 static struct kmem_cache
*inode_entry_slab
;
29 * We guarantee no failure on the returned page.
31 struct page
*grab_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
33 struct address_space
*mapping
= META_MAPPING(sbi
);
34 struct page
*page
= NULL
;
36 page
= grab_cache_page(mapping
, index
);
42 /* We wait writeback only inside grab_meta_page() */
43 wait_on_page_writeback(page
);
44 SetPageUptodate(page
);
49 * We guarantee no failure on the returned page.
51 struct page
*get_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
53 struct address_space
*mapping
= META_MAPPING(sbi
);
56 page
= grab_cache_page(mapping
, index
);
61 if (PageUptodate(page
))
64 if (f2fs_submit_page_bio(sbi
, page
, index
,
65 READ_SYNC
| REQ_META
| REQ_PRIO
))
69 if (unlikely(page
->mapping
!= mapping
)) {
70 f2fs_put_page(page
, 1);
74 mark_page_accessed(page
);
78 inline int get_max_meta_blks(struct f2fs_sb_info
*sbi
, int type
)
82 return NM_I(sbi
)->max_nid
/ NAT_ENTRY_PER_BLOCK
;
84 return SIT_BLK_CNT(sbi
);
94 * Readahead CP/NAT/SIT/SSA pages
96 int ra_meta_pages(struct f2fs_sb_info
*sbi
, int start
, int nrpages
, int type
)
98 block_t prev_blk_addr
= 0;
101 int max_blks
= get_max_meta_blks(sbi
, type
);
103 struct f2fs_io_info fio
= {
105 .rw
= READ_SYNC
| REQ_META
| REQ_PRIO
108 for (; nrpages
-- > 0; blkno
++) {
113 /* get nat block addr */
114 if (unlikely(blkno
>= max_blks
))
116 blk_addr
= current_nat_addr(sbi
,
117 blkno
* NAT_ENTRY_PER_BLOCK
);
120 /* get sit block addr */
121 if (unlikely(blkno
>= max_blks
))
123 blk_addr
= current_sit_addr(sbi
,
124 blkno
* SIT_ENTRY_PER_BLOCK
);
125 if (blkno
!= start
&& prev_blk_addr
+ 1 != blk_addr
)
127 prev_blk_addr
= blk_addr
;
131 /* get ssa/cp block addr */
138 page
= grab_cache_page(META_MAPPING(sbi
), blk_addr
);
141 if (PageUptodate(page
)) {
142 mark_page_accessed(page
);
143 f2fs_put_page(page
, 1);
147 f2fs_submit_page_mbio(sbi
, page
, blk_addr
, &fio
);
148 mark_page_accessed(page
);
149 f2fs_put_page(page
, 0);
152 f2fs_submit_merged_bio(sbi
, META
, READ
);
153 return blkno
- start
;
156 static int f2fs_write_meta_page(struct page
*page
,
157 struct writeback_control
*wbc
)
159 struct inode
*inode
= page
->mapping
->host
;
160 struct f2fs_sb_info
*sbi
= F2FS_SB(inode
->i_sb
);
162 if (unlikely(sbi
->por_doing
))
164 if (wbc
->for_reclaim
)
167 /* Should not write any meta pages, if any IO error was occurred */
168 if (unlikely(is_set_ckpt_flags(F2FS_CKPT(sbi
), CP_ERROR_FLAG
)))
171 wait_on_page_writeback(page
);
172 write_meta_page(sbi
, page
);
174 dec_page_count(sbi
, F2FS_DIRTY_META
);
179 dec_page_count(sbi
, F2FS_DIRTY_META
);
180 wbc
->pages_skipped
++;
181 account_page_redirty(page
);
182 set_page_dirty(page
);
183 return AOP_WRITEPAGE_ACTIVATE
;
186 static int f2fs_write_meta_pages(struct address_space
*mapping
,
187 struct writeback_control
*wbc
)
189 struct f2fs_sb_info
*sbi
= F2FS_SB(mapping
->host
->i_sb
);
190 int nrpages
= MAX_BIO_BLOCKS(max_hw_blocks(sbi
));
193 if (wbc
->for_kupdate
)
196 /* collect a number of dirty meta pages and write together */
197 if (get_pages(sbi
, F2FS_DIRTY_META
) < nrpages
)
200 /* if mounting is failed, skip writing node pages */
201 mutex_lock(&sbi
->cp_mutex
);
202 written
= sync_meta_pages(sbi
, META
, nrpages
);
203 mutex_unlock(&sbi
->cp_mutex
);
204 wbc
->nr_to_write
-= written
;
208 long sync_meta_pages(struct f2fs_sb_info
*sbi
, enum page_type type
,
211 struct address_space
*mapping
= META_MAPPING(sbi
);
212 pgoff_t index
= 0, end
= LONG_MAX
;
215 struct writeback_control wbc
= {
219 pagevec_init(&pvec
, 0);
221 while (index
<= end
) {
223 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &index
,
225 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
-1) + 1);
226 if (unlikely(nr_pages
== 0))
229 for (i
= 0; i
< nr_pages
; i
++) {
230 struct page
*page
= pvec
.pages
[i
];
234 if (unlikely(page
->mapping
!= mapping
)) {
239 if (!PageDirty(page
)) {
240 /* someone wrote it for us */
241 goto continue_unlock
;
244 if (!clear_page_dirty_for_io(page
))
245 goto continue_unlock
;
247 if (f2fs_write_meta_page(page
, &wbc
)) {
252 if (unlikely(nwritten
>= nr_to_write
))
255 pagevec_release(&pvec
);
260 f2fs_submit_merged_bio(sbi
, type
, WRITE
);
265 static int f2fs_set_meta_page_dirty(struct page
*page
)
267 struct address_space
*mapping
= page
->mapping
;
268 struct f2fs_sb_info
*sbi
= F2FS_SB(mapping
->host
->i_sb
);
270 trace_f2fs_set_page_dirty(page
, META
);
272 SetPageUptodate(page
);
273 if (!PageDirty(page
)) {
274 __set_page_dirty_nobuffers(page
);
275 inc_page_count(sbi
, F2FS_DIRTY_META
);
281 const struct address_space_operations f2fs_meta_aops
= {
282 .writepage
= f2fs_write_meta_page
,
283 .writepages
= f2fs_write_meta_pages
,
284 .set_page_dirty
= f2fs_set_meta_page_dirty
,
287 int acquire_orphan_inode(struct f2fs_sb_info
*sbi
)
291 spin_lock(&sbi
->orphan_inode_lock
);
292 if (unlikely(sbi
->n_orphans
>= sbi
->max_orphans
))
296 spin_unlock(&sbi
->orphan_inode_lock
);
301 void release_orphan_inode(struct f2fs_sb_info
*sbi
)
303 spin_lock(&sbi
->orphan_inode_lock
);
304 f2fs_bug_on(sbi
->n_orphans
== 0);
306 spin_unlock(&sbi
->orphan_inode_lock
);
309 void add_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
311 struct list_head
*head
, *this;
312 struct orphan_inode_entry
*new = NULL
, *orphan
= NULL
;
314 new = f2fs_kmem_cache_alloc(orphan_entry_slab
, GFP_ATOMIC
);
317 spin_lock(&sbi
->orphan_inode_lock
);
318 head
= &sbi
->orphan_inode_list
;
319 list_for_each(this, head
) {
320 orphan
= list_entry(this, struct orphan_inode_entry
, list
);
321 if (orphan
->ino
== ino
) {
322 spin_unlock(&sbi
->orphan_inode_lock
);
323 kmem_cache_free(orphan_entry_slab
, new);
327 if (orphan
->ino
> ino
)
332 /* add new_oentry into list which is sorted by inode number */
334 list_add(&new->list
, this->prev
);
336 list_add_tail(&new->list
, head
);
337 spin_unlock(&sbi
->orphan_inode_lock
);
340 void remove_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
342 struct list_head
*head
;
343 struct orphan_inode_entry
*orphan
;
345 spin_lock(&sbi
->orphan_inode_lock
);
346 head
= &sbi
->orphan_inode_list
;
347 list_for_each_entry(orphan
, head
, list
) {
348 if (orphan
->ino
== ino
) {
349 list_del(&orphan
->list
);
350 kmem_cache_free(orphan_entry_slab
, orphan
);
351 f2fs_bug_on(sbi
->n_orphans
== 0);
356 spin_unlock(&sbi
->orphan_inode_lock
);
359 static void recover_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
361 struct inode
*inode
= f2fs_iget(sbi
->sb
, ino
);
362 f2fs_bug_on(IS_ERR(inode
));
365 /* truncate all the data during iput */
369 void recover_orphan_inodes(struct f2fs_sb_info
*sbi
)
371 block_t start_blk
, orphan_blkaddr
, i
, j
;
373 if (!is_set_ckpt_flags(F2FS_CKPT(sbi
), CP_ORPHAN_PRESENT_FLAG
))
376 sbi
->por_doing
= true;
377 start_blk
= __start_cp_addr(sbi
) + 1;
378 orphan_blkaddr
= __start_sum_addr(sbi
) - 1;
380 ra_meta_pages(sbi
, start_blk
, orphan_blkaddr
, META_CP
);
382 for (i
= 0; i
< orphan_blkaddr
; i
++) {
383 struct page
*page
= get_meta_page(sbi
, start_blk
+ i
);
384 struct f2fs_orphan_block
*orphan_blk
;
386 orphan_blk
= (struct f2fs_orphan_block
*)page_address(page
);
387 for (j
= 0; j
< le32_to_cpu(orphan_blk
->entry_count
); j
++) {
388 nid_t ino
= le32_to_cpu(orphan_blk
->ino
[j
]);
389 recover_orphan_inode(sbi
, ino
);
391 f2fs_put_page(page
, 1);
393 /* clear Orphan Flag */
394 clear_ckpt_flags(F2FS_CKPT(sbi
), CP_ORPHAN_PRESENT_FLAG
);
395 sbi
->por_doing
= false;
399 static void write_orphan_inodes(struct f2fs_sb_info
*sbi
, block_t start_blk
)
401 struct list_head
*head
;
402 struct f2fs_orphan_block
*orphan_blk
= NULL
;
403 unsigned int nentries
= 0;
404 unsigned short index
;
405 unsigned short orphan_blocks
= (unsigned short)((sbi
->n_orphans
+
406 (F2FS_ORPHANS_PER_BLOCK
- 1)) / F2FS_ORPHANS_PER_BLOCK
);
407 struct page
*page
= NULL
;
408 struct orphan_inode_entry
*orphan
= NULL
;
410 for (index
= 0; index
< orphan_blocks
; index
++)
411 grab_meta_page(sbi
, start_blk
+ index
);
414 spin_lock(&sbi
->orphan_inode_lock
);
415 head
= &sbi
->orphan_inode_list
;
417 /* loop for each orphan inode entry and write them in Jornal block */
418 list_for_each_entry(orphan
, head
, list
) {
420 page
= find_get_page(META_MAPPING(sbi
), start_blk
++);
423 (struct f2fs_orphan_block
*)page_address(page
);
424 memset(orphan_blk
, 0, sizeof(*orphan_blk
));
425 f2fs_put_page(page
, 0);
428 orphan_blk
->ino
[nentries
++] = cpu_to_le32(orphan
->ino
);
430 if (nentries
== F2FS_ORPHANS_PER_BLOCK
) {
432 * an orphan block is full of 1020 entries,
433 * then we need to flush current orphan blocks
434 * and bring another one in memory
436 orphan_blk
->blk_addr
= cpu_to_le16(index
);
437 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
438 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
439 set_page_dirty(page
);
440 f2fs_put_page(page
, 1);
448 orphan_blk
->blk_addr
= cpu_to_le16(index
);
449 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
450 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
451 set_page_dirty(page
);
452 f2fs_put_page(page
, 1);
455 spin_unlock(&sbi
->orphan_inode_lock
);
458 static struct page
*validate_checkpoint(struct f2fs_sb_info
*sbi
,
459 block_t cp_addr
, unsigned long long *version
)
461 struct page
*cp_page_1
, *cp_page_2
= NULL
;
462 unsigned long blk_size
= sbi
->blocksize
;
463 struct f2fs_checkpoint
*cp_block
;
464 unsigned long long cur_version
= 0, pre_version
= 0;
468 /* Read the 1st cp block in this CP pack */
469 cp_page_1
= get_meta_page(sbi
, cp_addr
);
471 /* get the version number */
472 cp_block
= (struct f2fs_checkpoint
*)page_address(cp_page_1
);
473 crc_offset
= le32_to_cpu(cp_block
->checksum_offset
);
474 if (crc_offset
>= blk_size
)
477 crc
= le32_to_cpu(*((__u32
*)((unsigned char *)cp_block
+ crc_offset
)));
478 if (!f2fs_crc_valid(crc
, cp_block
, crc_offset
))
481 pre_version
= cur_cp_version(cp_block
);
483 /* Read the 2nd cp block in this CP pack */
484 cp_addr
+= le32_to_cpu(cp_block
->cp_pack_total_block_count
) - 1;
485 cp_page_2
= get_meta_page(sbi
, cp_addr
);
487 cp_block
= (struct f2fs_checkpoint
*)page_address(cp_page_2
);
488 crc_offset
= le32_to_cpu(cp_block
->checksum_offset
);
489 if (crc_offset
>= blk_size
)
492 crc
= le32_to_cpu(*((__u32
*)((unsigned char *)cp_block
+ crc_offset
)));
493 if (!f2fs_crc_valid(crc
, cp_block
, crc_offset
))
496 cur_version
= cur_cp_version(cp_block
);
498 if (cur_version
== pre_version
) {
499 *version
= cur_version
;
500 f2fs_put_page(cp_page_2
, 1);
504 f2fs_put_page(cp_page_2
, 1);
506 f2fs_put_page(cp_page_1
, 1);
510 int get_valid_checkpoint(struct f2fs_sb_info
*sbi
)
512 struct f2fs_checkpoint
*cp_block
;
513 struct f2fs_super_block
*fsb
= sbi
->raw_super
;
514 struct page
*cp1
, *cp2
, *cur_page
;
515 unsigned long blk_size
= sbi
->blocksize
;
516 unsigned long long cp1_version
= 0, cp2_version
= 0;
517 unsigned long long cp_start_blk_no
;
519 sbi
->ckpt
= kzalloc(blk_size
, GFP_KERNEL
);
523 * Finding out valid cp block involves read both
524 * sets( cp pack1 and cp pack 2)
526 cp_start_blk_no
= le32_to_cpu(fsb
->cp_blkaddr
);
527 cp1
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp1_version
);
529 /* The second checkpoint pack should start at the next segment */
530 cp_start_blk_no
+= ((unsigned long long)1) <<
531 le32_to_cpu(fsb
->log_blocks_per_seg
);
532 cp2
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp2_version
);
535 if (ver_after(cp2_version
, cp1_version
))
547 cp_block
= (struct f2fs_checkpoint
*)page_address(cur_page
);
548 memcpy(sbi
->ckpt
, cp_block
, blk_size
);
550 f2fs_put_page(cp1
, 1);
551 f2fs_put_page(cp2
, 1);
559 static int __add_dirty_inode(struct inode
*inode
, struct dir_inode_entry
*new)
561 struct f2fs_sb_info
*sbi
= F2FS_SB(inode
->i_sb
);
562 struct list_head
*head
= &sbi
->dir_inode_list
;
563 struct list_head
*this;
565 list_for_each(this, head
) {
566 struct dir_inode_entry
*entry
;
567 entry
= list_entry(this, struct dir_inode_entry
, list
);
568 if (unlikely(entry
->inode
== inode
))
571 list_add_tail(&new->list
, head
);
572 stat_inc_dirty_dir(sbi
);
576 void set_dirty_dir_page(struct inode
*inode
, struct page
*page
)
578 struct f2fs_sb_info
*sbi
= F2FS_SB(inode
->i_sb
);
579 struct dir_inode_entry
*new;
581 if (!S_ISDIR(inode
->i_mode
))
584 new = f2fs_kmem_cache_alloc(inode_entry_slab
, GFP_NOFS
);
586 INIT_LIST_HEAD(&new->list
);
588 spin_lock(&sbi
->dir_inode_lock
);
589 if (__add_dirty_inode(inode
, new))
590 kmem_cache_free(inode_entry_slab
, new);
592 inode_inc_dirty_dents(inode
);
593 SetPagePrivate(page
);
594 spin_unlock(&sbi
->dir_inode_lock
);
597 void add_dirty_dir_inode(struct inode
*inode
)
599 struct f2fs_sb_info
*sbi
= F2FS_SB(inode
->i_sb
);
600 struct dir_inode_entry
*new =
601 f2fs_kmem_cache_alloc(inode_entry_slab
, GFP_NOFS
);
604 INIT_LIST_HEAD(&new->list
);
606 spin_lock(&sbi
->dir_inode_lock
);
607 if (__add_dirty_inode(inode
, new))
608 kmem_cache_free(inode_entry_slab
, new);
609 spin_unlock(&sbi
->dir_inode_lock
);
612 void remove_dirty_dir_inode(struct inode
*inode
)
614 struct f2fs_sb_info
*sbi
= F2FS_SB(inode
->i_sb
);
616 struct list_head
*this, *head
;
618 if (!S_ISDIR(inode
->i_mode
))
621 spin_lock(&sbi
->dir_inode_lock
);
622 if (get_dirty_dents(inode
)) {
623 spin_unlock(&sbi
->dir_inode_lock
);
627 head
= &sbi
->dir_inode_list
;
628 list_for_each(this, head
) {
629 struct dir_inode_entry
*entry
;
630 entry
= list_entry(this, struct dir_inode_entry
, list
);
631 if (entry
->inode
== inode
) {
632 list_del(&entry
->list
);
633 kmem_cache_free(inode_entry_slab
, entry
);
634 stat_dec_dirty_dir(sbi
);
638 spin_unlock(&sbi
->dir_inode_lock
);
640 /* Only from the recovery routine */
641 if (is_inode_flag_set(F2FS_I(inode
), FI_DELAY_IPUT
)) {
642 clear_inode_flag(F2FS_I(inode
), FI_DELAY_IPUT
);
647 struct inode
*check_dirty_dir_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
650 struct list_head
*this, *head
;
651 struct inode
*inode
= NULL
;
653 spin_lock(&sbi
->dir_inode_lock
);
655 head
= &sbi
->dir_inode_list
;
656 list_for_each(this, head
) {
657 struct dir_inode_entry
*entry
;
658 entry
= list_entry(this, struct dir_inode_entry
, list
);
659 if (entry
->inode
->i_ino
== ino
) {
660 inode
= entry
->inode
;
664 spin_unlock(&sbi
->dir_inode_lock
);
668 void sync_dirty_dir_inodes(struct f2fs_sb_info
*sbi
)
670 struct list_head
*head
;
671 struct dir_inode_entry
*entry
;
674 spin_lock(&sbi
->dir_inode_lock
);
676 head
= &sbi
->dir_inode_list
;
677 if (list_empty(head
)) {
678 spin_unlock(&sbi
->dir_inode_lock
);
681 entry
= list_entry(head
->next
, struct dir_inode_entry
, list
);
682 inode
= igrab(entry
->inode
);
683 spin_unlock(&sbi
->dir_inode_lock
);
685 filemap_flush(inode
->i_mapping
);
689 * We should submit bio, since it exists several
690 * wribacking dentry pages in the freeing inode.
692 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
698 * Freeze all the FS-operations for checkpoint.
700 static void block_operations(struct f2fs_sb_info
*sbi
)
702 struct writeback_control wbc
= {
703 .sync_mode
= WB_SYNC_ALL
,
704 .nr_to_write
= LONG_MAX
,
707 struct blk_plug plug
;
709 blk_start_plug(&plug
);
713 /* write all the dirty dentry pages */
714 if (get_pages(sbi
, F2FS_DIRTY_DENTS
)) {
715 f2fs_unlock_all(sbi
);
716 sync_dirty_dir_inodes(sbi
);
717 goto retry_flush_dents
;
721 * POR: we should ensure that there is no dirty node pages
722 * until finishing nat/sit flush.
725 mutex_lock(&sbi
->node_write
);
727 if (get_pages(sbi
, F2FS_DIRTY_NODES
)) {
728 mutex_unlock(&sbi
->node_write
);
729 sync_node_pages(sbi
, 0, &wbc
);
730 goto retry_flush_nodes
;
732 blk_finish_plug(&plug
);
735 static void unblock_operations(struct f2fs_sb_info
*sbi
)
737 mutex_unlock(&sbi
->node_write
);
738 f2fs_unlock_all(sbi
);
741 static void wait_on_all_pages_writeback(struct f2fs_sb_info
*sbi
)
746 prepare_to_wait(&sbi
->cp_wait
, &wait
, TASK_UNINTERRUPTIBLE
);
748 if (!get_pages(sbi
, F2FS_WRITEBACK
))
753 finish_wait(&sbi
->cp_wait
, &wait
);
756 static void do_checkpoint(struct f2fs_sb_info
*sbi
, bool is_umount
)
758 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
761 struct page
*cp_page
;
762 unsigned int data_sum_blocks
, orphan_blocks
;
767 /* Flush all the NAT/SIT pages */
768 while (get_pages(sbi
, F2FS_DIRTY_META
))
769 sync_meta_pages(sbi
, META
, LONG_MAX
);
771 next_free_nid(sbi
, &last_nid
);
775 * version number is already updated
777 ckpt
->elapsed_time
= cpu_to_le64(get_mtime(sbi
));
778 ckpt
->valid_block_count
= cpu_to_le64(valid_user_blocks(sbi
));
779 ckpt
->free_segment_count
= cpu_to_le32(free_segments(sbi
));
780 for (i
= 0; i
< 3; i
++) {
781 ckpt
->cur_node_segno
[i
] =
782 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_NODE
));
783 ckpt
->cur_node_blkoff
[i
] =
784 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_NODE
));
785 ckpt
->alloc_type
[i
+ CURSEG_HOT_NODE
] =
786 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_NODE
);
788 for (i
= 0; i
< 3; i
++) {
789 ckpt
->cur_data_segno
[i
] =
790 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_DATA
));
791 ckpt
->cur_data_blkoff
[i
] =
792 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_DATA
));
793 ckpt
->alloc_type
[i
+ CURSEG_HOT_DATA
] =
794 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_DATA
);
797 ckpt
->valid_node_count
= cpu_to_le32(valid_node_count(sbi
));
798 ckpt
->valid_inode_count
= cpu_to_le32(valid_inode_count(sbi
));
799 ckpt
->next_free_nid
= cpu_to_le32(last_nid
);
801 /* 2 cp + n data seg summary + orphan inode blocks */
802 data_sum_blocks
= npages_for_summary_flush(sbi
);
803 if (data_sum_blocks
< 3)
804 set_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
806 clear_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
808 orphan_blocks
= (sbi
->n_orphans
+ F2FS_ORPHANS_PER_BLOCK
- 1)
809 / F2FS_ORPHANS_PER_BLOCK
;
810 ckpt
->cp_pack_start_sum
= cpu_to_le32(1 + orphan_blocks
);
813 set_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
814 ckpt
->cp_pack_total_block_count
= cpu_to_le32(2 +
815 data_sum_blocks
+ orphan_blocks
+ NR_CURSEG_NODE_TYPE
);
817 clear_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
818 ckpt
->cp_pack_total_block_count
= cpu_to_le32(2 +
819 data_sum_blocks
+ orphan_blocks
);
823 set_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
825 clear_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
827 /* update SIT/NAT bitmap */
828 get_sit_bitmap(sbi
, __bitmap_ptr(sbi
, SIT_BITMAP
));
829 get_nat_bitmap(sbi
, __bitmap_ptr(sbi
, NAT_BITMAP
));
831 crc32
= f2fs_crc32(ckpt
, le32_to_cpu(ckpt
->checksum_offset
));
832 *((__le32
*)((unsigned char *)ckpt
+
833 le32_to_cpu(ckpt
->checksum_offset
)))
834 = cpu_to_le32(crc32
);
836 start_blk
= __start_cp_addr(sbi
);
838 /* write out checkpoint buffer at block 0 */
839 cp_page
= grab_meta_page(sbi
, start_blk
++);
840 kaddr
= page_address(cp_page
);
841 memcpy(kaddr
, ckpt
, (1 << sbi
->log_blocksize
));
842 set_page_dirty(cp_page
);
843 f2fs_put_page(cp_page
, 1);
845 if (sbi
->n_orphans
) {
846 write_orphan_inodes(sbi
, start_blk
);
847 start_blk
+= orphan_blocks
;
850 write_data_summaries(sbi
, start_blk
);
851 start_blk
+= data_sum_blocks
;
853 write_node_summaries(sbi
, start_blk
);
854 start_blk
+= NR_CURSEG_NODE_TYPE
;
857 /* writeout checkpoint block */
858 cp_page
= grab_meta_page(sbi
, start_blk
);
859 kaddr
= page_address(cp_page
);
860 memcpy(kaddr
, ckpt
, (1 << sbi
->log_blocksize
));
861 set_page_dirty(cp_page
);
862 f2fs_put_page(cp_page
, 1);
864 /* wait for previous submitted node/meta pages writeback */
865 wait_on_all_pages_writeback(sbi
);
867 filemap_fdatawait_range(NODE_MAPPING(sbi
), 0, LONG_MAX
);
868 filemap_fdatawait_range(META_MAPPING(sbi
), 0, LONG_MAX
);
870 /* update user_block_counts */
871 sbi
->last_valid_block_count
= sbi
->total_valid_block_count
;
872 sbi
->alloc_valid_block_count
= 0;
874 /* Here, we only have one bio having CP pack */
875 sync_meta_pages(sbi
, META_FLUSH
, LONG_MAX
);
877 if (unlikely(!is_set_ckpt_flags(ckpt
, CP_ERROR_FLAG
))) {
878 clear_prefree_segments(sbi
);
879 F2FS_RESET_SB_DIRT(sbi
);
884 * We guarantee that this checkpoint procedure should not fail.
886 void write_checkpoint(struct f2fs_sb_info
*sbi
, bool is_umount
)
888 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
889 unsigned long long ckpt_ver
;
891 trace_f2fs_write_checkpoint(sbi
->sb
, is_umount
, "start block_ops");
893 mutex_lock(&sbi
->cp_mutex
);
894 block_operations(sbi
);
896 trace_f2fs_write_checkpoint(sbi
->sb
, is_umount
, "finish block_ops");
898 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
899 f2fs_submit_merged_bio(sbi
, NODE
, WRITE
);
900 f2fs_submit_merged_bio(sbi
, META
, WRITE
);
903 * update checkpoint pack index
904 * Increase the version number so that
905 * SIT entries and seg summaries are written at correct place
907 ckpt_ver
= cur_cp_version(ckpt
);
908 ckpt
->checkpoint_ver
= cpu_to_le64(++ckpt_ver
);
910 /* write cached NAT/SIT entries to NAT/SIT area */
911 flush_nat_entries(sbi
);
912 flush_sit_entries(sbi
);
914 /* unlock all the fs_lock[] in do_checkpoint() */
915 do_checkpoint(sbi
, is_umount
);
917 unblock_operations(sbi
);
918 mutex_unlock(&sbi
->cp_mutex
);
920 stat_inc_cp_count(sbi
->stat_info
);
921 trace_f2fs_write_checkpoint(sbi
->sb
, is_umount
, "finish checkpoint");
924 void init_orphan_info(struct f2fs_sb_info
*sbi
)
926 spin_lock_init(&sbi
->orphan_inode_lock
);
927 INIT_LIST_HEAD(&sbi
->orphan_inode_list
);
930 * considering 512 blocks in a segment 8 blocks are needed for cp
931 * and log segment summaries. Remaining blocks are used to keep
932 * orphan entries with the limitation one reserved segment
933 * for cp pack we can have max 1020*504 orphan entries
935 sbi
->max_orphans
= (sbi
->blocks_per_seg
- 2 - NR_CURSEG_TYPE
)
936 * F2FS_ORPHANS_PER_BLOCK
;
939 int __init
create_checkpoint_caches(void)
941 orphan_entry_slab
= f2fs_kmem_cache_create("f2fs_orphan_entry",
942 sizeof(struct orphan_inode_entry
));
943 if (!orphan_entry_slab
)
945 inode_entry_slab
= f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
946 sizeof(struct dir_inode_entry
));
947 if (!inode_entry_slab
) {
948 kmem_cache_destroy(orphan_entry_slab
);
954 void destroy_checkpoint_caches(void)
956 kmem_cache_destroy(orphan_entry_slab
);
957 kmem_cache_destroy(inode_entry_slab
);