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
;
30 * We guarantee no failure on the returned page.
32 struct page
*grab_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
34 struct address_space
*mapping
= META_MAPPING(sbi
);
35 struct page
*page
= NULL
;
37 page
= grab_cache_page(mapping
, index
);
42 f2fs_wait_on_page_writeback(page
, META
);
43 SetPageUptodate(page
);
48 * We guarantee no failure on the returned page.
50 struct page
*get_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
52 struct address_space
*mapping
= META_MAPPING(sbi
);
54 struct f2fs_io_info fio
= {
57 .rw
= READ_SYNC
| REQ_META
| REQ_PRIO
,
59 .encrypted_page
= NULL
,
62 page
= grab_cache_page(mapping
, index
);
67 if (PageUptodate(page
))
72 if (f2fs_submit_page_bio(&fio
)) {
73 f2fs_put_page(page
, 1);
78 if (unlikely(page
->mapping
!= mapping
)) {
79 f2fs_put_page(page
, 1);
84 * if there is any IO error when accessing device, make our filesystem
85 * readonly and make sure do not write checkpoint with non-uptodate
88 if (unlikely(!PageUptodate(page
)))
89 f2fs_stop_checkpoint(sbi
);
94 bool is_valid_blkaddr(struct f2fs_sb_info
*sbi
, block_t blkaddr
, int type
)
100 if (unlikely(blkaddr
>= SIT_BLK_CNT(sbi
)))
104 if (unlikely(blkaddr
>= MAIN_BLKADDR(sbi
) ||
105 blkaddr
< SM_I(sbi
)->ssa_blkaddr
))
109 if (unlikely(blkaddr
>= SIT_I(sbi
)->sit_base_addr
||
110 blkaddr
< __start_cp_addr(sbi
)))
114 if (unlikely(blkaddr
>= MAX_BLKADDR(sbi
) ||
115 blkaddr
< MAIN_BLKADDR(sbi
)))
126 * Readahead CP/NAT/SIT/SSA pages
128 int ra_meta_pages(struct f2fs_sb_info
*sbi
, block_t start
, int nrpages
, int type
)
130 block_t prev_blk_addr
= 0;
132 block_t blkno
= start
;
133 struct f2fs_io_info fio
= {
136 .rw
= READ_SYNC
| REQ_META
| REQ_PRIO
,
137 .encrypted_page
= NULL
,
140 for (; nrpages
-- > 0; blkno
++) {
142 if (!is_valid_blkaddr(sbi
, blkno
, type
))
147 if (unlikely(blkno
>=
148 NAT_BLOCK_OFFSET(NM_I(sbi
)->max_nid
)))
150 /* get nat block addr */
151 fio
.blk_addr
= current_nat_addr(sbi
,
152 blkno
* NAT_ENTRY_PER_BLOCK
);
155 /* get sit block addr */
156 fio
.blk_addr
= current_sit_addr(sbi
,
157 blkno
* SIT_ENTRY_PER_BLOCK
);
158 if (blkno
!= start
&& prev_blk_addr
+ 1 != fio
.blk_addr
)
160 prev_blk_addr
= fio
.blk_addr
;
165 fio
.blk_addr
= blkno
;
171 page
= grab_cache_page(META_MAPPING(sbi
), fio
.blk_addr
);
174 if (PageUptodate(page
)) {
175 f2fs_put_page(page
, 1);
180 f2fs_submit_page_mbio(&fio
);
181 f2fs_put_page(page
, 0);
184 f2fs_submit_merged_bio(sbi
, META
, READ
);
185 return blkno
- start
;
188 void ra_meta_pages_cond(struct f2fs_sb_info
*sbi
, pgoff_t index
)
191 bool readahead
= false;
193 page
= find_get_page(META_MAPPING(sbi
), index
);
194 if (!page
|| (page
&& !PageUptodate(page
)))
196 f2fs_put_page(page
, 0);
199 ra_meta_pages(sbi
, index
, MAX_BIO_BLOCKS(sbi
), META_POR
);
202 static int f2fs_write_meta_page(struct page
*page
,
203 struct writeback_control
*wbc
)
205 struct f2fs_sb_info
*sbi
= F2FS_P_SB(page
);
207 trace_f2fs_writepage(page
, META
);
209 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
211 if (wbc
->for_reclaim
&& page
->index
< GET_SUM_BLOCK(sbi
, 0))
213 if (unlikely(f2fs_cp_error(sbi
)))
216 f2fs_wait_on_page_writeback(page
, META
);
217 write_meta_page(sbi
, page
);
218 dec_page_count(sbi
, F2FS_DIRTY_META
);
221 if (wbc
->for_reclaim
)
222 f2fs_submit_merged_bio(sbi
, META
, WRITE
);
226 redirty_page_for_writepage(wbc
, page
);
227 return AOP_WRITEPAGE_ACTIVATE
;
230 static int f2fs_write_meta_pages(struct address_space
*mapping
,
231 struct writeback_control
*wbc
)
233 struct f2fs_sb_info
*sbi
= F2FS_M_SB(mapping
);
236 trace_f2fs_writepages(mapping
->host
, wbc
, META
);
238 /* collect a number of dirty meta pages and write together */
239 if (wbc
->for_kupdate
||
240 get_pages(sbi
, F2FS_DIRTY_META
) < nr_pages_to_skip(sbi
, META
))
243 /* if mounting is failed, skip writing node pages */
244 mutex_lock(&sbi
->cp_mutex
);
245 diff
= nr_pages_to_write(sbi
, META
, wbc
);
246 written
= sync_meta_pages(sbi
, META
, wbc
->nr_to_write
);
247 mutex_unlock(&sbi
->cp_mutex
);
248 wbc
->nr_to_write
= max((long)0, wbc
->nr_to_write
- written
- diff
);
252 wbc
->pages_skipped
+= get_pages(sbi
, F2FS_DIRTY_META
);
256 long sync_meta_pages(struct f2fs_sb_info
*sbi
, enum page_type type
,
259 struct address_space
*mapping
= META_MAPPING(sbi
);
260 pgoff_t index
= 0, end
= LONG_MAX
;
263 struct writeback_control wbc
= {
267 pagevec_init(&pvec
, 0);
269 while (index
<= end
) {
271 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &index
,
273 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
-1) + 1);
274 if (unlikely(nr_pages
== 0))
277 for (i
= 0; i
< nr_pages
; i
++) {
278 struct page
*page
= pvec
.pages
[i
];
282 if (unlikely(page
->mapping
!= mapping
)) {
287 if (!PageDirty(page
)) {
288 /* someone wrote it for us */
289 goto continue_unlock
;
292 if (!clear_page_dirty_for_io(page
))
293 goto continue_unlock
;
295 if (mapping
->a_ops
->writepage(page
, &wbc
)) {
300 if (unlikely(nwritten
>= nr_to_write
))
303 pagevec_release(&pvec
);
308 f2fs_submit_merged_bio(sbi
, type
, WRITE
);
313 static int f2fs_set_meta_page_dirty(struct page
*page
)
315 trace_f2fs_set_page_dirty(page
, META
);
317 SetPageUptodate(page
);
318 if (!PageDirty(page
)) {
319 __set_page_dirty_nobuffers(page
);
320 inc_page_count(F2FS_P_SB(page
), F2FS_DIRTY_META
);
321 SetPagePrivate(page
);
322 f2fs_trace_pid(page
);
328 const struct address_space_operations f2fs_meta_aops
= {
329 .writepage
= f2fs_write_meta_page
,
330 .writepages
= f2fs_write_meta_pages
,
331 .set_page_dirty
= f2fs_set_meta_page_dirty
,
332 .invalidatepage
= f2fs_invalidate_page
,
333 .releasepage
= f2fs_release_page
,
336 static void __add_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
338 struct inode_management
*im
= &sbi
->im
[type
];
341 if (radix_tree_preload(GFP_NOFS
)) {
346 spin_lock(&im
->ino_lock
);
348 e
= radix_tree_lookup(&im
->ino_root
, ino
);
350 e
= kmem_cache_alloc(ino_entry_slab
, GFP_ATOMIC
);
352 spin_unlock(&im
->ino_lock
);
353 radix_tree_preload_end();
356 if (radix_tree_insert(&im
->ino_root
, ino
, e
)) {
357 spin_unlock(&im
->ino_lock
);
358 kmem_cache_free(ino_entry_slab
, e
);
359 radix_tree_preload_end();
362 memset(e
, 0, sizeof(struct ino_entry
));
365 list_add_tail(&e
->list
, &im
->ino_list
);
366 if (type
!= ORPHAN_INO
)
369 spin_unlock(&im
->ino_lock
);
370 radix_tree_preload_end();
373 static void __remove_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
375 struct inode_management
*im
= &sbi
->im
[type
];
378 spin_lock(&im
->ino_lock
);
379 e
= radix_tree_lookup(&im
->ino_root
, ino
);
382 radix_tree_delete(&im
->ino_root
, ino
);
384 spin_unlock(&im
->ino_lock
);
385 kmem_cache_free(ino_entry_slab
, e
);
388 spin_unlock(&im
->ino_lock
);
391 void add_dirty_inode(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
393 /* add new dirty ino entry into list */
394 __add_ino_entry(sbi
, ino
, type
);
397 void remove_dirty_inode(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
399 /* remove dirty ino entry from list */
400 __remove_ino_entry(sbi
, ino
, type
);
403 /* mode should be APPEND_INO or UPDATE_INO */
404 bool exist_written_data(struct f2fs_sb_info
*sbi
, nid_t ino
, int mode
)
406 struct inode_management
*im
= &sbi
->im
[mode
];
409 spin_lock(&im
->ino_lock
);
410 e
= radix_tree_lookup(&im
->ino_root
, ino
);
411 spin_unlock(&im
->ino_lock
);
412 return e
? true : false;
415 void release_dirty_inode(struct f2fs_sb_info
*sbi
)
417 struct ino_entry
*e
, *tmp
;
420 for (i
= APPEND_INO
; i
<= UPDATE_INO
; i
++) {
421 struct inode_management
*im
= &sbi
->im
[i
];
423 spin_lock(&im
->ino_lock
);
424 list_for_each_entry_safe(e
, tmp
, &im
->ino_list
, list
) {
426 radix_tree_delete(&im
->ino_root
, e
->ino
);
427 kmem_cache_free(ino_entry_slab
, e
);
430 spin_unlock(&im
->ino_lock
);
434 int acquire_orphan_inode(struct f2fs_sb_info
*sbi
)
436 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
439 spin_lock(&im
->ino_lock
);
440 if (unlikely(im
->ino_num
>= sbi
->max_orphans
))
444 spin_unlock(&im
->ino_lock
);
449 void release_orphan_inode(struct f2fs_sb_info
*sbi
)
451 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
453 spin_lock(&im
->ino_lock
);
454 f2fs_bug_on(sbi
, im
->ino_num
== 0);
456 spin_unlock(&im
->ino_lock
);
459 void add_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
461 /* add new orphan ino entry into list */
462 __add_ino_entry(sbi
, ino
, ORPHAN_INO
);
465 void remove_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
467 /* remove orphan entry from orphan list */
468 __remove_ino_entry(sbi
, ino
, ORPHAN_INO
);
471 static int recover_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
475 inode
= f2fs_iget(sbi
->sb
, ino
);
478 * there should be a bug that we can't find the entry
481 f2fs_bug_on(sbi
, PTR_ERR(inode
) == -ENOENT
);
482 return PTR_ERR(inode
);
487 /* truncate all the data during iput */
492 int recover_orphan_inodes(struct f2fs_sb_info
*sbi
)
494 block_t start_blk
, orphan_blocks
, i
, j
;
497 if (!is_set_ckpt_flags(F2FS_CKPT(sbi
), CP_ORPHAN_PRESENT_FLAG
))
500 set_sbi_flag(sbi
, SBI_POR_DOING
);
502 start_blk
= __start_cp_addr(sbi
) + 1 + __cp_payload(sbi
);
503 orphan_blocks
= __start_sum_addr(sbi
) - 1 - __cp_payload(sbi
);
505 ra_meta_pages(sbi
, start_blk
, orphan_blocks
, META_CP
);
507 for (i
= 0; i
< orphan_blocks
; i
++) {
508 struct page
*page
= get_meta_page(sbi
, start_blk
+ i
);
509 struct f2fs_orphan_block
*orphan_blk
;
511 orphan_blk
= (struct f2fs_orphan_block
*)page_address(page
);
512 for (j
= 0; j
< le32_to_cpu(orphan_blk
->entry_count
); j
++) {
513 nid_t ino
= le32_to_cpu(orphan_blk
->ino
[j
]);
514 err
= recover_orphan_inode(sbi
, ino
);
516 f2fs_put_page(page
, 1);
517 clear_sbi_flag(sbi
, SBI_POR_DOING
);
521 f2fs_put_page(page
, 1);
523 /* clear Orphan Flag */
524 clear_ckpt_flags(F2FS_CKPT(sbi
), CP_ORPHAN_PRESENT_FLAG
);
525 clear_sbi_flag(sbi
, SBI_POR_DOING
);
529 static void write_orphan_inodes(struct f2fs_sb_info
*sbi
, block_t start_blk
)
531 struct list_head
*head
;
532 struct f2fs_orphan_block
*orphan_blk
= NULL
;
533 unsigned int nentries
= 0;
534 unsigned short index
= 1;
535 unsigned short orphan_blocks
;
536 struct page
*page
= NULL
;
537 struct ino_entry
*orphan
= NULL
;
538 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
540 orphan_blocks
= GET_ORPHAN_BLOCKS(im
->ino_num
);
543 * we don't need to do spin_lock(&im->ino_lock) here, since all the
544 * orphan inode operations are covered under f2fs_lock_op().
545 * And, spin_lock should be avoided due to page operations below.
547 head
= &im
->ino_list
;
549 /* loop for each orphan inode entry and write them in Jornal block */
550 list_for_each_entry(orphan
, head
, list
) {
552 page
= grab_meta_page(sbi
, start_blk
++);
554 (struct f2fs_orphan_block
*)page_address(page
);
555 memset(orphan_blk
, 0, sizeof(*orphan_blk
));
558 orphan_blk
->ino
[nentries
++] = cpu_to_le32(orphan
->ino
);
560 if (nentries
== F2FS_ORPHANS_PER_BLOCK
) {
562 * an orphan block is full of 1020 entries,
563 * then we need to flush current orphan blocks
564 * and bring another one in memory
566 orphan_blk
->blk_addr
= cpu_to_le16(index
);
567 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
568 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
569 set_page_dirty(page
);
570 f2fs_put_page(page
, 1);
578 orphan_blk
->blk_addr
= cpu_to_le16(index
);
579 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
580 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
581 set_page_dirty(page
);
582 f2fs_put_page(page
, 1);
586 static struct page
*validate_checkpoint(struct f2fs_sb_info
*sbi
,
587 block_t cp_addr
, unsigned long long *version
)
589 struct page
*cp_page_1
, *cp_page_2
= NULL
;
590 unsigned long blk_size
= sbi
->blocksize
;
591 struct f2fs_checkpoint
*cp_block
;
592 unsigned long long cur_version
= 0, pre_version
= 0;
596 /* Read the 1st cp block in this CP pack */
597 cp_page_1
= get_meta_page(sbi
, cp_addr
);
599 /* get the version number */
600 cp_block
= (struct f2fs_checkpoint
*)page_address(cp_page_1
);
601 crc_offset
= le32_to_cpu(cp_block
->checksum_offset
);
602 if (crc_offset
>= blk_size
)
605 crc
= le32_to_cpu(*((__le32
*)((unsigned char *)cp_block
+ crc_offset
)));
606 if (!f2fs_crc_valid(crc
, cp_block
, crc_offset
))
609 pre_version
= cur_cp_version(cp_block
);
611 /* Read the 2nd cp block in this CP pack */
612 cp_addr
+= le32_to_cpu(cp_block
->cp_pack_total_block_count
) - 1;
613 cp_page_2
= get_meta_page(sbi
, cp_addr
);
615 cp_block
= (struct f2fs_checkpoint
*)page_address(cp_page_2
);
616 crc_offset
= le32_to_cpu(cp_block
->checksum_offset
);
617 if (crc_offset
>= blk_size
)
620 crc
= le32_to_cpu(*((__le32
*)((unsigned char *)cp_block
+ crc_offset
)));
621 if (!f2fs_crc_valid(crc
, cp_block
, crc_offset
))
624 cur_version
= cur_cp_version(cp_block
);
626 if (cur_version
== pre_version
) {
627 *version
= cur_version
;
628 f2fs_put_page(cp_page_2
, 1);
632 f2fs_put_page(cp_page_2
, 1);
634 f2fs_put_page(cp_page_1
, 1);
638 int get_valid_checkpoint(struct f2fs_sb_info
*sbi
)
640 struct f2fs_checkpoint
*cp_block
;
641 struct f2fs_super_block
*fsb
= sbi
->raw_super
;
642 struct page
*cp1
, *cp2
, *cur_page
;
643 unsigned long blk_size
= sbi
->blocksize
;
644 unsigned long long cp1_version
= 0, cp2_version
= 0;
645 unsigned long long cp_start_blk_no
;
646 unsigned int cp_blks
= 1 + __cp_payload(sbi
);
650 sbi
->ckpt
= kzalloc(cp_blks
* blk_size
, GFP_KERNEL
);
654 * Finding out valid cp block involves read both
655 * sets( cp pack1 and cp pack 2)
657 cp_start_blk_no
= le32_to_cpu(fsb
->cp_blkaddr
);
658 cp1
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp1_version
);
660 /* The second checkpoint pack should start at the next segment */
661 cp_start_blk_no
+= ((unsigned long long)1) <<
662 le32_to_cpu(fsb
->log_blocks_per_seg
);
663 cp2
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp2_version
);
666 if (ver_after(cp2_version
, cp1_version
))
678 cp_block
= (struct f2fs_checkpoint
*)page_address(cur_page
);
679 memcpy(sbi
->ckpt
, cp_block
, blk_size
);
684 cp_blk_no
= le32_to_cpu(fsb
->cp_blkaddr
);
686 cp_blk_no
+= 1 << le32_to_cpu(fsb
->log_blocks_per_seg
);
688 for (i
= 1; i
< cp_blks
; i
++) {
689 void *sit_bitmap_ptr
;
690 unsigned char *ckpt
= (unsigned char *)sbi
->ckpt
;
692 cur_page
= get_meta_page(sbi
, cp_blk_no
+ i
);
693 sit_bitmap_ptr
= page_address(cur_page
);
694 memcpy(ckpt
+ i
* blk_size
, sit_bitmap_ptr
, blk_size
);
695 f2fs_put_page(cur_page
, 1);
698 f2fs_put_page(cp1
, 1);
699 f2fs_put_page(cp2
, 1);
707 static int __add_dirty_inode(struct inode
*inode
, struct inode_entry
*new)
709 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
711 if (is_inode_flag_set(F2FS_I(inode
), FI_DIRTY_DIR
))
714 set_inode_flag(F2FS_I(inode
), FI_DIRTY_DIR
);
715 F2FS_I(inode
)->dirty_dir
= new;
716 list_add_tail(&new->list
, &sbi
->dir_inode_list
);
717 stat_inc_dirty_dir(sbi
);
721 void update_dirty_page(struct inode
*inode
, struct page
*page
)
723 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
724 struct inode_entry
*new;
727 if (!S_ISDIR(inode
->i_mode
) && !S_ISREG(inode
->i_mode
) &&
728 !S_ISLNK(inode
->i_mode
))
731 if (!S_ISDIR(inode
->i_mode
)) {
732 inode_inc_dirty_pages(inode
);
736 new = f2fs_kmem_cache_alloc(inode_entry_slab
, GFP_NOFS
);
738 INIT_LIST_HEAD(&new->list
);
740 spin_lock(&sbi
->dir_inode_lock
);
741 ret
= __add_dirty_inode(inode
, new);
742 inode_inc_dirty_pages(inode
);
743 spin_unlock(&sbi
->dir_inode_lock
);
746 kmem_cache_free(inode_entry_slab
, new);
748 SetPagePrivate(page
);
749 f2fs_trace_pid(page
);
752 void add_dirty_dir_inode(struct inode
*inode
)
754 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
755 struct inode_entry
*new =
756 f2fs_kmem_cache_alloc(inode_entry_slab
, GFP_NOFS
);
760 INIT_LIST_HEAD(&new->list
);
762 spin_lock(&sbi
->dir_inode_lock
);
763 ret
= __add_dirty_inode(inode
, new);
764 spin_unlock(&sbi
->dir_inode_lock
);
767 kmem_cache_free(inode_entry_slab
, new);
770 void remove_dirty_dir_inode(struct inode
*inode
)
772 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
773 struct inode_entry
*entry
;
775 if (!S_ISDIR(inode
->i_mode
))
778 spin_lock(&sbi
->dir_inode_lock
);
779 if (get_dirty_pages(inode
) ||
780 !is_inode_flag_set(F2FS_I(inode
), FI_DIRTY_DIR
)) {
781 spin_unlock(&sbi
->dir_inode_lock
);
785 entry
= F2FS_I(inode
)->dirty_dir
;
786 list_del(&entry
->list
);
787 F2FS_I(inode
)->dirty_dir
= NULL
;
788 clear_inode_flag(F2FS_I(inode
), FI_DIRTY_DIR
);
789 stat_dec_dirty_dir(sbi
);
790 spin_unlock(&sbi
->dir_inode_lock
);
791 kmem_cache_free(inode_entry_slab
, entry
);
793 /* Only from the recovery routine */
794 if (is_inode_flag_set(F2FS_I(inode
), FI_DELAY_IPUT
)) {
795 clear_inode_flag(F2FS_I(inode
), FI_DELAY_IPUT
);
800 void sync_dirty_dir_inodes(struct f2fs_sb_info
*sbi
)
802 struct list_head
*head
;
803 struct inode_entry
*entry
;
806 if (unlikely(f2fs_cp_error(sbi
)))
809 spin_lock(&sbi
->dir_inode_lock
);
811 head
= &sbi
->dir_inode_list
;
812 if (list_empty(head
)) {
813 spin_unlock(&sbi
->dir_inode_lock
);
816 entry
= list_entry(head
->next
, struct inode_entry
, list
);
817 inode
= igrab(entry
->inode
);
818 spin_unlock(&sbi
->dir_inode_lock
);
820 filemap_fdatawrite(inode
->i_mapping
);
824 * We should submit bio, since it exists several
825 * wribacking dentry pages in the freeing inode.
827 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
834 * Freeze all the FS-operations for checkpoint.
836 static int block_operations(struct f2fs_sb_info
*sbi
)
838 struct writeback_control wbc
= {
839 .sync_mode
= WB_SYNC_ALL
,
840 .nr_to_write
= LONG_MAX
,
843 struct blk_plug plug
;
846 blk_start_plug(&plug
);
850 /* write all the dirty dentry pages */
851 if (get_pages(sbi
, F2FS_DIRTY_DENTS
)) {
852 f2fs_unlock_all(sbi
);
853 sync_dirty_dir_inodes(sbi
);
854 if (unlikely(f2fs_cp_error(sbi
))) {
858 goto retry_flush_dents
;
862 * POR: we should ensure that there are no dirty node pages
863 * until finishing nat/sit flush.
866 down_write(&sbi
->node_write
);
868 if (get_pages(sbi
, F2FS_DIRTY_NODES
)) {
869 up_write(&sbi
->node_write
);
870 sync_node_pages(sbi
, 0, &wbc
);
871 if (unlikely(f2fs_cp_error(sbi
))) {
872 f2fs_unlock_all(sbi
);
876 goto retry_flush_nodes
;
879 blk_finish_plug(&plug
);
883 static void unblock_operations(struct f2fs_sb_info
*sbi
)
885 up_write(&sbi
->node_write
);
886 f2fs_unlock_all(sbi
);
889 static void wait_on_all_pages_writeback(struct f2fs_sb_info
*sbi
)
894 prepare_to_wait(&sbi
->cp_wait
, &wait
, TASK_UNINTERRUPTIBLE
);
896 if (!get_pages(sbi
, F2FS_WRITEBACK
))
901 finish_wait(&sbi
->cp_wait
, &wait
);
904 static void do_checkpoint(struct f2fs_sb_info
*sbi
, struct cp_control
*cpc
)
906 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
907 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_WARM_NODE
);
908 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
909 unsigned long orphan_num
= sbi
->im
[ORPHAN_INO
].ino_num
;
910 nid_t last_nid
= nm_i
->next_scan_nid
;
912 unsigned int data_sum_blocks
, orphan_blocks
;
915 int cp_payload_blks
= __cp_payload(sbi
);
916 block_t discard_blk
= NEXT_FREE_BLKADDR(sbi
, curseg
);
917 bool invalidate
= false;
920 * This avoids to conduct wrong roll-forward operations and uses
921 * metapages, so should be called prior to sync_meta_pages below.
923 if (discard_next_dnode(sbi
, discard_blk
))
926 /* Flush all the NAT/SIT pages */
927 while (get_pages(sbi
, F2FS_DIRTY_META
)) {
928 sync_meta_pages(sbi
, META
, LONG_MAX
);
929 if (unlikely(f2fs_cp_error(sbi
)))
933 next_free_nid(sbi
, &last_nid
);
937 * version number is already updated
939 ckpt
->elapsed_time
= cpu_to_le64(get_mtime(sbi
));
940 ckpt
->valid_block_count
= cpu_to_le64(valid_user_blocks(sbi
));
941 ckpt
->free_segment_count
= cpu_to_le32(free_segments(sbi
));
942 for (i
= 0; i
< NR_CURSEG_NODE_TYPE
; i
++) {
943 ckpt
->cur_node_segno
[i
] =
944 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_NODE
));
945 ckpt
->cur_node_blkoff
[i
] =
946 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_NODE
));
947 ckpt
->alloc_type
[i
+ CURSEG_HOT_NODE
] =
948 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_NODE
);
950 for (i
= 0; i
< NR_CURSEG_DATA_TYPE
; i
++) {
951 ckpt
->cur_data_segno
[i
] =
952 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_DATA
));
953 ckpt
->cur_data_blkoff
[i
] =
954 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_DATA
));
955 ckpt
->alloc_type
[i
+ CURSEG_HOT_DATA
] =
956 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_DATA
);
959 ckpt
->valid_node_count
= cpu_to_le32(valid_node_count(sbi
));
960 ckpt
->valid_inode_count
= cpu_to_le32(valid_inode_count(sbi
));
961 ckpt
->next_free_nid
= cpu_to_le32(last_nid
);
963 /* 2 cp + n data seg summary + orphan inode blocks */
964 data_sum_blocks
= npages_for_summary_flush(sbi
, false);
965 if (data_sum_blocks
< NR_CURSEG_DATA_TYPE
)
966 set_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
968 clear_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
970 orphan_blocks
= GET_ORPHAN_BLOCKS(orphan_num
);
971 ckpt
->cp_pack_start_sum
= cpu_to_le32(1 + cp_payload_blks
+
974 if (__remain_node_summaries(cpc
->reason
))
975 ckpt
->cp_pack_total_block_count
= cpu_to_le32(F2FS_CP_PACKS
+
976 cp_payload_blks
+ data_sum_blocks
+
977 orphan_blocks
+ NR_CURSEG_NODE_TYPE
);
979 ckpt
->cp_pack_total_block_count
= cpu_to_le32(F2FS_CP_PACKS
+
980 cp_payload_blks
+ data_sum_blocks
+
983 if (cpc
->reason
== CP_UMOUNT
)
984 set_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
986 clear_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
988 if (cpc
->reason
== CP_FASTBOOT
)
989 set_ckpt_flags(ckpt
, CP_FASTBOOT_FLAG
);
991 clear_ckpt_flags(ckpt
, CP_FASTBOOT_FLAG
);
994 set_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
996 clear_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
998 if (is_sbi_flag_set(sbi
, SBI_NEED_FSCK
))
999 set_ckpt_flags(ckpt
, CP_FSCK_FLAG
);
1001 /* update SIT/NAT bitmap */
1002 get_sit_bitmap(sbi
, __bitmap_ptr(sbi
, SIT_BITMAP
));
1003 get_nat_bitmap(sbi
, __bitmap_ptr(sbi
, NAT_BITMAP
));
1005 crc32
= f2fs_crc32(ckpt
, le32_to_cpu(ckpt
->checksum_offset
));
1006 *((__le32
*)((unsigned char *)ckpt
+
1007 le32_to_cpu(ckpt
->checksum_offset
)))
1008 = cpu_to_le32(crc32
);
1010 start_blk
= __start_cp_addr(sbi
);
1012 /* write out checkpoint buffer at block 0 */
1013 update_meta_page(sbi
, ckpt
, start_blk
++);
1015 for (i
= 1; i
< 1 + cp_payload_blks
; i
++)
1016 update_meta_page(sbi
, (char *)ckpt
+ i
* F2FS_BLKSIZE
,
1020 write_orphan_inodes(sbi
, start_blk
);
1021 start_blk
+= orphan_blocks
;
1024 write_data_summaries(sbi
, start_blk
);
1025 start_blk
+= data_sum_blocks
;
1026 if (__remain_node_summaries(cpc
->reason
)) {
1027 write_node_summaries(sbi
, start_blk
);
1028 start_blk
+= NR_CURSEG_NODE_TYPE
;
1031 /* writeout checkpoint block */
1032 update_meta_page(sbi
, ckpt
, start_blk
);
1034 /* wait for previous submitted node/meta pages writeback */
1035 wait_on_all_pages_writeback(sbi
);
1037 if (unlikely(f2fs_cp_error(sbi
)))
1040 filemap_fdatawait_range(NODE_MAPPING(sbi
), 0, LONG_MAX
);
1041 filemap_fdatawait_range(META_MAPPING(sbi
), 0, LONG_MAX
);
1043 /* update user_block_counts */
1044 sbi
->last_valid_block_count
= sbi
->total_valid_block_count
;
1045 sbi
->alloc_valid_block_count
= 0;
1047 /* Here, we only have one bio having CP pack */
1048 sync_meta_pages(sbi
, META_FLUSH
, LONG_MAX
);
1050 /* wait for previous submitted meta pages writeback */
1051 wait_on_all_pages_writeback(sbi
);
1054 * invalidate meta page which is used temporarily for zeroing out
1055 * block at the end of warm node chain.
1058 invalidate_mapping_pages(META_MAPPING(sbi
), discard_blk
,
1061 release_dirty_inode(sbi
);
1063 if (unlikely(f2fs_cp_error(sbi
)))
1066 clear_prefree_segments(sbi
, cpc
);
1067 clear_sbi_flag(sbi
, SBI_IS_DIRTY
);
1071 * We guarantee that this checkpoint procedure will not fail.
1073 void write_checkpoint(struct f2fs_sb_info
*sbi
, struct cp_control
*cpc
)
1075 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
1076 unsigned long long ckpt_ver
;
1078 mutex_lock(&sbi
->cp_mutex
);
1080 if (!is_sbi_flag_set(sbi
, SBI_IS_DIRTY
) &&
1081 (cpc
->reason
== CP_FASTBOOT
|| cpc
->reason
== CP_SYNC
||
1082 (cpc
->reason
== CP_DISCARD
&& !sbi
->discard_blks
)))
1084 if (unlikely(f2fs_cp_error(sbi
)))
1086 if (f2fs_readonly(sbi
->sb
))
1089 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "start block_ops");
1091 if (block_operations(sbi
))
1094 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "finish block_ops");
1096 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
1097 f2fs_submit_merged_bio(sbi
, NODE
, WRITE
);
1098 f2fs_submit_merged_bio(sbi
, META
, WRITE
);
1101 * update checkpoint pack index
1102 * Increase the version number so that
1103 * SIT entries and seg summaries are written at correct place
1105 ckpt_ver
= cur_cp_version(ckpt
);
1106 ckpt
->checkpoint_ver
= cpu_to_le64(++ckpt_ver
);
1108 /* write cached NAT/SIT entries to NAT/SIT area */
1109 flush_nat_entries(sbi
);
1110 flush_sit_entries(sbi
, cpc
);
1112 /* unlock all the fs_lock[] in do_checkpoint() */
1113 do_checkpoint(sbi
, cpc
);
1115 unblock_operations(sbi
);
1116 stat_inc_cp_count(sbi
->stat_info
);
1118 if (cpc
->reason
== CP_RECOVERY
)
1119 f2fs_msg(sbi
->sb
, KERN_NOTICE
,
1120 "checkpoint: version = %llx", ckpt_ver
);
1122 mutex_unlock(&sbi
->cp_mutex
);
1123 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "finish checkpoint");
1126 void init_ino_entry_info(struct f2fs_sb_info
*sbi
)
1130 for (i
= 0; i
< MAX_INO_ENTRY
; i
++) {
1131 struct inode_management
*im
= &sbi
->im
[i
];
1133 INIT_RADIX_TREE(&im
->ino_root
, GFP_ATOMIC
);
1134 spin_lock_init(&im
->ino_lock
);
1135 INIT_LIST_HEAD(&im
->ino_list
);
1139 sbi
->max_orphans
= (sbi
->blocks_per_seg
- F2FS_CP_PACKS
-
1140 NR_CURSEG_TYPE
- __cp_payload(sbi
)) *
1141 F2FS_ORPHANS_PER_BLOCK
;
1144 int __init
create_checkpoint_caches(void)
1146 ino_entry_slab
= f2fs_kmem_cache_create("f2fs_ino_entry",
1147 sizeof(struct ino_entry
));
1148 if (!ino_entry_slab
)
1150 inode_entry_slab
= f2fs_kmem_cache_create("f2fs_inode_entry",
1151 sizeof(struct inode_entry
));
1152 if (!inode_entry_slab
) {
1153 kmem_cache_destroy(ino_entry_slab
);
1159 void destroy_checkpoint_caches(void)
1161 kmem_cache_destroy(ino_entry_slab
);
1162 kmem_cache_destroy(inode_entry_slab
);