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
*ino_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
);
41 f2fs_wait_on_page_writeback(page
, META
);
42 SetPageUptodate(page
);
47 * We guarantee no failure on the returned page.
49 struct page
*get_meta_page(struct f2fs_sb_info
*sbi
, pgoff_t index
)
51 struct address_space
*mapping
= META_MAPPING(sbi
);
53 struct f2fs_io_info fio
= {
55 .rw
= READ_SYNC
| REQ_META
| REQ_PRIO
,
59 page
= grab_cache_page(mapping
, index
);
64 if (PageUptodate(page
))
67 if (f2fs_submit_page_bio(sbi
, page
, &fio
))
71 if (unlikely(page
->mapping
!= mapping
)) {
72 f2fs_put_page(page
, 1);
79 static inline bool is_valid_blkaddr(struct f2fs_sb_info
*sbi
,
80 block_t blkaddr
, int type
)
86 if (unlikely(blkaddr
>= SIT_BLK_CNT(sbi
)))
90 if (unlikely(blkaddr
>= MAIN_BLKADDR(sbi
) ||
91 blkaddr
< SM_I(sbi
)->ssa_blkaddr
))
95 if (unlikely(blkaddr
>= SIT_I(sbi
)->sit_base_addr
||
96 blkaddr
< __start_cp_addr(sbi
)))
100 if (unlikely(blkaddr
>= MAX_BLKADDR(sbi
) ||
101 blkaddr
< MAIN_BLKADDR(sbi
)))
112 * Readahead CP/NAT/SIT/SSA pages
114 int ra_meta_pages(struct f2fs_sb_info
*sbi
, block_t start
, int nrpages
, int type
)
116 block_t prev_blk_addr
= 0;
118 block_t blkno
= start
;
119 struct f2fs_io_info fio
= {
121 .rw
= READ_SYNC
| REQ_META
| REQ_PRIO
124 for (; nrpages
-- > 0; blkno
++) {
126 if (!is_valid_blkaddr(sbi
, blkno
, type
))
131 if (unlikely(blkno
>=
132 NAT_BLOCK_OFFSET(NM_I(sbi
)->max_nid
)))
134 /* get nat block addr */
135 fio
.blk_addr
= current_nat_addr(sbi
,
136 blkno
* NAT_ENTRY_PER_BLOCK
);
139 /* get sit block addr */
140 fio
.blk_addr
= current_sit_addr(sbi
,
141 blkno
* SIT_ENTRY_PER_BLOCK
);
142 if (blkno
!= start
&& prev_blk_addr
+ 1 != fio
.blk_addr
)
144 prev_blk_addr
= fio
.blk_addr
;
149 fio
.blk_addr
= blkno
;
155 page
= grab_cache_page(META_MAPPING(sbi
), fio
.blk_addr
);
158 if (PageUptodate(page
)) {
159 f2fs_put_page(page
, 1);
163 f2fs_submit_page_mbio(sbi
, page
, &fio
);
164 f2fs_put_page(page
, 0);
167 f2fs_submit_merged_bio(sbi
, META
, READ
);
168 return blkno
- start
;
171 void ra_meta_pages_cond(struct f2fs_sb_info
*sbi
, pgoff_t index
)
174 bool readahead
= false;
176 page
= find_get_page(META_MAPPING(sbi
), index
);
177 if (!page
|| (page
&& !PageUptodate(page
)))
179 f2fs_put_page(page
, 0);
182 ra_meta_pages(sbi
, index
, MAX_BIO_BLOCKS(sbi
), META_POR
);
185 static int f2fs_write_meta_page(struct page
*page
,
186 struct writeback_control
*wbc
)
188 struct f2fs_sb_info
*sbi
= F2FS_P_SB(page
);
190 trace_f2fs_writepage(page
, META
);
192 if (unlikely(sbi
->por_doing
))
194 if (wbc
->for_reclaim
&& page
->index
< GET_SUM_BLOCK(sbi
, 0))
196 if (unlikely(f2fs_cp_error(sbi
)))
199 f2fs_wait_on_page_writeback(page
, META
);
200 write_meta_page(sbi
, page
);
201 dec_page_count(sbi
, F2FS_DIRTY_META
);
204 if (wbc
->for_reclaim
)
205 f2fs_submit_merged_bio(sbi
, META
, WRITE
);
209 redirty_page_for_writepage(wbc
, page
);
210 return AOP_WRITEPAGE_ACTIVATE
;
213 static int f2fs_write_meta_pages(struct address_space
*mapping
,
214 struct writeback_control
*wbc
)
216 struct f2fs_sb_info
*sbi
= F2FS_M_SB(mapping
);
219 trace_f2fs_writepages(mapping
->host
, wbc
, META
);
221 /* collect a number of dirty meta pages and write together */
222 if (wbc
->for_kupdate
||
223 get_pages(sbi
, F2FS_DIRTY_META
) < nr_pages_to_skip(sbi
, META
))
226 /* if mounting is failed, skip writing node pages */
227 mutex_lock(&sbi
->cp_mutex
);
228 diff
= nr_pages_to_write(sbi
, META
, wbc
);
229 written
= sync_meta_pages(sbi
, META
, wbc
->nr_to_write
);
230 mutex_unlock(&sbi
->cp_mutex
);
231 wbc
->nr_to_write
= max((long)0, wbc
->nr_to_write
- written
- diff
);
235 wbc
->pages_skipped
+= get_pages(sbi
, F2FS_DIRTY_META
);
239 long sync_meta_pages(struct f2fs_sb_info
*sbi
, enum page_type type
,
242 struct address_space
*mapping
= META_MAPPING(sbi
);
243 pgoff_t index
= 0, end
= LONG_MAX
;
246 struct writeback_control wbc
= {
250 pagevec_init(&pvec
, 0);
252 while (index
<= end
) {
254 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &index
,
256 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
-1) + 1);
257 if (unlikely(nr_pages
== 0))
260 for (i
= 0; i
< nr_pages
; i
++) {
261 struct page
*page
= pvec
.pages
[i
];
265 if (unlikely(page
->mapping
!= mapping
)) {
270 if (!PageDirty(page
)) {
271 /* someone wrote it for us */
272 goto continue_unlock
;
275 if (!clear_page_dirty_for_io(page
))
276 goto continue_unlock
;
278 if (f2fs_write_meta_page(page
, &wbc
)) {
283 if (unlikely(nwritten
>= nr_to_write
))
286 pagevec_release(&pvec
);
291 f2fs_submit_merged_bio(sbi
, type
, WRITE
);
296 static int f2fs_set_meta_page_dirty(struct page
*page
)
298 trace_f2fs_set_page_dirty(page
, META
);
300 SetPageUptodate(page
);
301 if (!PageDirty(page
)) {
302 __set_page_dirty_nobuffers(page
);
303 inc_page_count(F2FS_P_SB(page
), F2FS_DIRTY_META
);
309 const struct address_space_operations f2fs_meta_aops
= {
310 .writepage
= f2fs_write_meta_page
,
311 .writepages
= f2fs_write_meta_pages
,
312 .set_page_dirty
= f2fs_set_meta_page_dirty
,
315 static void __add_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
317 struct inode_management
*im
= &sbi
->im
[type
];
320 if (radix_tree_preload(GFP_NOFS
)) {
325 spin_lock(&im
->ino_lock
);
327 e
= radix_tree_lookup(&im
->ino_root
, ino
);
329 e
= kmem_cache_alloc(ino_entry_slab
, GFP_ATOMIC
);
331 spin_unlock(&im
->ino_lock
);
332 radix_tree_preload_end();
335 if (radix_tree_insert(&im
->ino_root
, ino
, e
)) {
336 spin_unlock(&im
->ino_lock
);
337 kmem_cache_free(ino_entry_slab
, e
);
338 radix_tree_preload_end();
341 memset(e
, 0, sizeof(struct ino_entry
));
344 list_add_tail(&e
->list
, &im
->ino_list
);
345 if (type
!= ORPHAN_INO
)
348 spin_unlock(&im
->ino_lock
);
349 radix_tree_preload_end();
352 static void __remove_ino_entry(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
354 struct inode_management
*im
= &sbi
->im
[type
];
357 spin_lock(&im
->ino_lock
);
358 e
= radix_tree_lookup(&im
->ino_root
, ino
);
361 radix_tree_delete(&im
->ino_root
, ino
);
363 spin_unlock(&im
->ino_lock
);
364 kmem_cache_free(ino_entry_slab
, e
);
367 spin_unlock(&im
->ino_lock
);
370 void add_dirty_inode(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
372 /* add new dirty ino entry into list */
373 __add_ino_entry(sbi
, ino
, type
);
376 void remove_dirty_inode(struct f2fs_sb_info
*sbi
, nid_t ino
, int type
)
378 /* remove dirty ino entry from list */
379 __remove_ino_entry(sbi
, ino
, type
);
382 /* mode should be APPEND_INO or UPDATE_INO */
383 bool exist_written_data(struct f2fs_sb_info
*sbi
, nid_t ino
, int mode
)
385 struct inode_management
*im
= &sbi
->im
[mode
];
388 spin_lock(&im
->ino_lock
);
389 e
= radix_tree_lookup(&im
->ino_root
, ino
);
390 spin_unlock(&im
->ino_lock
);
391 return e
? true : false;
394 void release_dirty_inode(struct f2fs_sb_info
*sbi
)
396 struct ino_entry
*e
, *tmp
;
399 for (i
= APPEND_INO
; i
<= UPDATE_INO
; i
++) {
400 struct inode_management
*im
= &sbi
->im
[i
];
402 spin_lock(&im
->ino_lock
);
403 list_for_each_entry_safe(e
, tmp
, &im
->ino_list
, list
) {
405 radix_tree_delete(&im
->ino_root
, e
->ino
);
406 kmem_cache_free(ino_entry_slab
, e
);
409 spin_unlock(&im
->ino_lock
);
413 int acquire_orphan_inode(struct f2fs_sb_info
*sbi
)
415 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
418 spin_lock(&im
->ino_lock
);
419 if (unlikely(im
->ino_num
>= sbi
->max_orphans
))
423 spin_unlock(&im
->ino_lock
);
428 void release_orphan_inode(struct f2fs_sb_info
*sbi
)
430 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
432 spin_lock(&im
->ino_lock
);
433 f2fs_bug_on(sbi
, im
->ino_num
== 0);
435 spin_unlock(&im
->ino_lock
);
438 void add_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
440 /* add new orphan ino entry into list */
441 __add_ino_entry(sbi
, ino
, ORPHAN_INO
);
444 void remove_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
446 /* remove orphan entry from orphan list */
447 __remove_ino_entry(sbi
, ino
, ORPHAN_INO
);
450 static void recover_orphan_inode(struct f2fs_sb_info
*sbi
, nid_t ino
)
452 struct inode
*inode
= f2fs_iget(sbi
->sb
, ino
);
453 f2fs_bug_on(sbi
, IS_ERR(inode
));
456 /* truncate all the data during iput */
460 void recover_orphan_inodes(struct f2fs_sb_info
*sbi
)
462 block_t start_blk
, orphan_blkaddr
, i
, j
;
464 if (!is_set_ckpt_flags(F2FS_CKPT(sbi
), CP_ORPHAN_PRESENT_FLAG
))
467 sbi
->por_doing
= true;
469 start_blk
= __start_cp_addr(sbi
) + 1 +
470 le32_to_cpu(F2FS_RAW_SUPER(sbi
)->cp_payload
);
471 orphan_blkaddr
= __start_sum_addr(sbi
) - 1;
473 ra_meta_pages(sbi
, start_blk
, orphan_blkaddr
, META_CP
);
475 for (i
= 0; i
< orphan_blkaddr
; i
++) {
476 struct page
*page
= get_meta_page(sbi
, start_blk
+ i
);
477 struct f2fs_orphan_block
*orphan_blk
;
479 orphan_blk
= (struct f2fs_orphan_block
*)page_address(page
);
480 for (j
= 0; j
< le32_to_cpu(orphan_blk
->entry_count
); j
++) {
481 nid_t ino
= le32_to_cpu(orphan_blk
->ino
[j
]);
482 recover_orphan_inode(sbi
, ino
);
484 f2fs_put_page(page
, 1);
486 /* clear Orphan Flag */
487 clear_ckpt_flags(F2FS_CKPT(sbi
), CP_ORPHAN_PRESENT_FLAG
);
488 sbi
->por_doing
= false;
492 static void write_orphan_inodes(struct f2fs_sb_info
*sbi
, block_t start_blk
)
494 struct list_head
*head
;
495 struct f2fs_orphan_block
*orphan_blk
= NULL
;
496 unsigned int nentries
= 0;
497 unsigned short index
;
498 unsigned short orphan_blocks
;
499 struct page
*page
= NULL
;
500 struct ino_entry
*orphan
= NULL
;
501 struct inode_management
*im
= &sbi
->im
[ORPHAN_INO
];
503 orphan_blocks
= GET_ORPHAN_BLOCKS(im
->ino_num
);
505 for (index
= 0; index
< orphan_blocks
; index
++)
506 grab_meta_page(sbi
, start_blk
+ index
);
509 spin_lock(&im
->ino_lock
);
510 head
= &im
->ino_list
;
512 /* loop for each orphan inode entry and write them in Jornal block */
513 list_for_each_entry(orphan
, head
, list
) {
515 page
= find_get_page(META_MAPPING(sbi
), start_blk
++);
516 f2fs_bug_on(sbi
, !page
);
518 (struct f2fs_orphan_block
*)page_address(page
);
519 memset(orphan_blk
, 0, sizeof(*orphan_blk
));
520 f2fs_put_page(page
, 0);
523 orphan_blk
->ino
[nentries
++] = cpu_to_le32(orphan
->ino
);
525 if (nentries
== F2FS_ORPHANS_PER_BLOCK
) {
527 * an orphan block is full of 1020 entries,
528 * then we need to flush current orphan blocks
529 * and bring another one in memory
531 orphan_blk
->blk_addr
= cpu_to_le16(index
);
532 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
533 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
534 set_page_dirty(page
);
535 f2fs_put_page(page
, 1);
543 orphan_blk
->blk_addr
= cpu_to_le16(index
);
544 orphan_blk
->blk_count
= cpu_to_le16(orphan_blocks
);
545 orphan_blk
->entry_count
= cpu_to_le32(nentries
);
546 set_page_dirty(page
);
547 f2fs_put_page(page
, 1);
550 spin_unlock(&im
->ino_lock
);
553 static struct page
*validate_checkpoint(struct f2fs_sb_info
*sbi
,
554 block_t cp_addr
, unsigned long long *version
)
556 struct page
*cp_page_1
, *cp_page_2
= NULL
;
557 unsigned long blk_size
= sbi
->blocksize
;
558 struct f2fs_checkpoint
*cp_block
;
559 unsigned long long cur_version
= 0, pre_version
= 0;
563 /* Read the 1st cp block in this CP pack */
564 cp_page_1
= get_meta_page(sbi
, cp_addr
);
566 /* get the version number */
567 cp_block
= (struct f2fs_checkpoint
*)page_address(cp_page_1
);
568 crc_offset
= le32_to_cpu(cp_block
->checksum_offset
);
569 if (crc_offset
>= blk_size
)
572 crc
= le32_to_cpu(*((__u32
*)((unsigned char *)cp_block
+ crc_offset
)));
573 if (!f2fs_crc_valid(crc
, cp_block
, crc_offset
))
576 pre_version
= cur_cp_version(cp_block
);
578 /* Read the 2nd cp block in this CP pack */
579 cp_addr
+= le32_to_cpu(cp_block
->cp_pack_total_block_count
) - 1;
580 cp_page_2
= get_meta_page(sbi
, cp_addr
);
582 cp_block
= (struct f2fs_checkpoint
*)page_address(cp_page_2
);
583 crc_offset
= le32_to_cpu(cp_block
->checksum_offset
);
584 if (crc_offset
>= blk_size
)
587 crc
= le32_to_cpu(*((__u32
*)((unsigned char *)cp_block
+ crc_offset
)));
588 if (!f2fs_crc_valid(crc
, cp_block
, crc_offset
))
591 cur_version
= cur_cp_version(cp_block
);
593 if (cur_version
== pre_version
) {
594 *version
= cur_version
;
595 f2fs_put_page(cp_page_2
, 1);
599 f2fs_put_page(cp_page_2
, 1);
601 f2fs_put_page(cp_page_1
, 1);
605 int get_valid_checkpoint(struct f2fs_sb_info
*sbi
)
607 struct f2fs_checkpoint
*cp_block
;
608 struct f2fs_super_block
*fsb
= sbi
->raw_super
;
609 struct page
*cp1
, *cp2
, *cur_page
;
610 unsigned long blk_size
= sbi
->blocksize
;
611 unsigned long long cp1_version
= 0, cp2_version
= 0;
612 unsigned long long cp_start_blk_no
;
613 unsigned int cp_blks
= 1 + le32_to_cpu(F2FS_RAW_SUPER(sbi
)->cp_payload
);
617 sbi
->ckpt
= kzalloc(cp_blks
* blk_size
, GFP_KERNEL
);
621 * Finding out valid cp block involves read both
622 * sets( cp pack1 and cp pack 2)
624 cp_start_blk_no
= le32_to_cpu(fsb
->cp_blkaddr
);
625 cp1
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp1_version
);
627 /* The second checkpoint pack should start at the next segment */
628 cp_start_blk_no
+= ((unsigned long long)1) <<
629 le32_to_cpu(fsb
->log_blocks_per_seg
);
630 cp2
= validate_checkpoint(sbi
, cp_start_blk_no
, &cp2_version
);
633 if (ver_after(cp2_version
, cp1_version
))
645 cp_block
= (struct f2fs_checkpoint
*)page_address(cur_page
);
646 memcpy(sbi
->ckpt
, cp_block
, blk_size
);
651 cp_blk_no
= le32_to_cpu(fsb
->cp_blkaddr
);
653 cp_blk_no
+= 1 << le32_to_cpu(fsb
->log_blocks_per_seg
);
655 for (i
= 1; i
< cp_blks
; i
++) {
656 void *sit_bitmap_ptr
;
657 unsigned char *ckpt
= (unsigned char *)sbi
->ckpt
;
659 cur_page
= get_meta_page(sbi
, cp_blk_no
+ i
);
660 sit_bitmap_ptr
= page_address(cur_page
);
661 memcpy(ckpt
+ i
* blk_size
, sit_bitmap_ptr
, blk_size
);
662 f2fs_put_page(cur_page
, 1);
665 f2fs_put_page(cp1
, 1);
666 f2fs_put_page(cp2
, 1);
674 static int __add_dirty_inode(struct inode
*inode
, struct dir_inode_entry
*new)
676 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
678 if (is_inode_flag_set(F2FS_I(inode
), FI_DIRTY_DIR
))
681 set_inode_flag(F2FS_I(inode
), FI_DIRTY_DIR
);
682 F2FS_I(inode
)->dirty_dir
= new;
683 list_add_tail(&new->list
, &sbi
->dir_inode_list
);
684 stat_inc_dirty_dir(sbi
);
688 void update_dirty_page(struct inode
*inode
, struct page
*page
)
690 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
691 struct dir_inode_entry
*new;
694 if (!S_ISDIR(inode
->i_mode
) && !S_ISREG(inode
->i_mode
))
697 if (!S_ISDIR(inode
->i_mode
)) {
698 inode_inc_dirty_pages(inode
);
702 new = f2fs_kmem_cache_alloc(inode_entry_slab
, GFP_NOFS
);
704 INIT_LIST_HEAD(&new->list
);
706 spin_lock(&sbi
->dir_inode_lock
);
707 ret
= __add_dirty_inode(inode
, new);
708 inode_inc_dirty_pages(inode
);
709 spin_unlock(&sbi
->dir_inode_lock
);
712 kmem_cache_free(inode_entry_slab
, new);
714 SetPagePrivate(page
);
717 void add_dirty_dir_inode(struct inode
*inode
)
719 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
720 struct dir_inode_entry
*new =
721 f2fs_kmem_cache_alloc(inode_entry_slab
, GFP_NOFS
);
725 INIT_LIST_HEAD(&new->list
);
727 spin_lock(&sbi
->dir_inode_lock
);
728 ret
= __add_dirty_inode(inode
, new);
729 spin_unlock(&sbi
->dir_inode_lock
);
732 kmem_cache_free(inode_entry_slab
, new);
735 void remove_dirty_dir_inode(struct inode
*inode
)
737 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
738 struct dir_inode_entry
*entry
;
740 if (!S_ISDIR(inode
->i_mode
))
743 spin_lock(&sbi
->dir_inode_lock
);
744 if (get_dirty_pages(inode
) ||
745 !is_inode_flag_set(F2FS_I(inode
), FI_DIRTY_DIR
)) {
746 spin_unlock(&sbi
->dir_inode_lock
);
750 entry
= F2FS_I(inode
)->dirty_dir
;
751 list_del(&entry
->list
);
752 F2FS_I(inode
)->dirty_dir
= NULL
;
753 clear_inode_flag(F2FS_I(inode
), FI_DIRTY_DIR
);
754 stat_dec_dirty_dir(sbi
);
755 spin_unlock(&sbi
->dir_inode_lock
);
756 kmem_cache_free(inode_entry_slab
, entry
);
758 /* Only from the recovery routine */
759 if (is_inode_flag_set(F2FS_I(inode
), FI_DELAY_IPUT
)) {
760 clear_inode_flag(F2FS_I(inode
), FI_DELAY_IPUT
);
765 void sync_dirty_dir_inodes(struct f2fs_sb_info
*sbi
)
767 struct list_head
*head
;
768 struct dir_inode_entry
*entry
;
771 if (unlikely(f2fs_cp_error(sbi
)))
774 spin_lock(&sbi
->dir_inode_lock
);
776 head
= &sbi
->dir_inode_list
;
777 if (list_empty(head
)) {
778 spin_unlock(&sbi
->dir_inode_lock
);
781 entry
= list_entry(head
->next
, struct dir_inode_entry
, list
);
782 inode
= igrab(entry
->inode
);
783 spin_unlock(&sbi
->dir_inode_lock
);
785 filemap_fdatawrite(inode
->i_mapping
);
789 * We should submit bio, since it exists several
790 * wribacking dentry pages in the freeing inode.
792 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
798 * Freeze all the FS-operations for checkpoint.
800 static int block_operations(struct f2fs_sb_info
*sbi
)
802 struct writeback_control wbc
= {
803 .sync_mode
= WB_SYNC_ALL
,
804 .nr_to_write
= LONG_MAX
,
807 struct blk_plug plug
;
810 blk_start_plug(&plug
);
814 /* write all the dirty dentry pages */
815 if (get_pages(sbi
, F2FS_DIRTY_DENTS
)) {
816 f2fs_unlock_all(sbi
);
817 sync_dirty_dir_inodes(sbi
);
818 if (unlikely(f2fs_cp_error(sbi
))) {
822 goto retry_flush_dents
;
826 * POR: we should ensure that there are no dirty node pages
827 * until finishing nat/sit flush.
830 down_write(&sbi
->node_write
);
832 if (get_pages(sbi
, F2FS_DIRTY_NODES
)) {
833 up_write(&sbi
->node_write
);
834 sync_node_pages(sbi
, 0, &wbc
);
835 if (unlikely(f2fs_cp_error(sbi
))) {
836 f2fs_unlock_all(sbi
);
840 goto retry_flush_nodes
;
843 blk_finish_plug(&plug
);
847 static void unblock_operations(struct f2fs_sb_info
*sbi
)
849 up_write(&sbi
->node_write
);
850 f2fs_unlock_all(sbi
);
853 static void wait_on_all_pages_writeback(struct f2fs_sb_info
*sbi
)
858 prepare_to_wait(&sbi
->cp_wait
, &wait
, TASK_UNINTERRUPTIBLE
);
860 if (!get_pages(sbi
, F2FS_WRITEBACK
))
865 finish_wait(&sbi
->cp_wait
, &wait
);
868 static void do_checkpoint(struct f2fs_sb_info
*sbi
, struct cp_control
*cpc
)
870 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
871 struct curseg_info
*curseg
= CURSEG_I(sbi
, CURSEG_WARM_NODE
);
872 struct f2fs_nm_info
*nm_i
= NM_I(sbi
);
873 unsigned long orphan_num
= sbi
->im
[ORPHAN_INO
].ino_num
;
874 nid_t last_nid
= nm_i
->next_scan_nid
;
876 struct page
*cp_page
;
877 unsigned int data_sum_blocks
, orphan_blocks
;
881 int cp_payload_blks
= le32_to_cpu(F2FS_RAW_SUPER(sbi
)->cp_payload
);
884 * This avoids to conduct wrong roll-forward operations and uses
885 * metapages, so should be called prior to sync_meta_pages below.
887 discard_next_dnode(sbi
, NEXT_FREE_BLKADDR(sbi
, curseg
));
889 /* Flush all the NAT/SIT pages */
890 while (get_pages(sbi
, F2FS_DIRTY_META
)) {
891 sync_meta_pages(sbi
, META
, LONG_MAX
);
892 if (unlikely(f2fs_cp_error(sbi
)))
896 next_free_nid(sbi
, &last_nid
);
900 * version number is already updated
902 ckpt
->elapsed_time
= cpu_to_le64(get_mtime(sbi
));
903 ckpt
->valid_block_count
= cpu_to_le64(valid_user_blocks(sbi
));
904 ckpt
->free_segment_count
= cpu_to_le32(free_segments(sbi
));
905 for (i
= 0; i
< NR_CURSEG_NODE_TYPE
; i
++) {
906 ckpt
->cur_node_segno
[i
] =
907 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_NODE
));
908 ckpt
->cur_node_blkoff
[i
] =
909 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_NODE
));
910 ckpt
->alloc_type
[i
+ CURSEG_HOT_NODE
] =
911 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_NODE
);
913 for (i
= 0; i
< NR_CURSEG_DATA_TYPE
; i
++) {
914 ckpt
->cur_data_segno
[i
] =
915 cpu_to_le32(curseg_segno(sbi
, i
+ CURSEG_HOT_DATA
));
916 ckpt
->cur_data_blkoff
[i
] =
917 cpu_to_le16(curseg_blkoff(sbi
, i
+ CURSEG_HOT_DATA
));
918 ckpt
->alloc_type
[i
+ CURSEG_HOT_DATA
] =
919 curseg_alloc_type(sbi
, i
+ CURSEG_HOT_DATA
);
922 ckpt
->valid_node_count
= cpu_to_le32(valid_node_count(sbi
));
923 ckpt
->valid_inode_count
= cpu_to_le32(valid_inode_count(sbi
));
924 ckpt
->next_free_nid
= cpu_to_le32(last_nid
);
926 /* 2 cp + n data seg summary + orphan inode blocks */
927 data_sum_blocks
= npages_for_summary_flush(sbi
, false);
928 if (data_sum_blocks
< NR_CURSEG_DATA_TYPE
)
929 set_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
931 clear_ckpt_flags(ckpt
, CP_COMPACT_SUM_FLAG
);
933 orphan_blocks
= GET_ORPHAN_BLOCKS(orphan_num
);
934 ckpt
->cp_pack_start_sum
= cpu_to_le32(1 + cp_payload_blks
+
937 if (cpc
->reason
== CP_UMOUNT
) {
938 set_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
939 ckpt
->cp_pack_total_block_count
= cpu_to_le32(F2FS_CP_PACKS
+
940 cp_payload_blks
+ data_sum_blocks
+
941 orphan_blocks
+ NR_CURSEG_NODE_TYPE
);
943 clear_ckpt_flags(ckpt
, CP_UMOUNT_FLAG
);
944 ckpt
->cp_pack_total_block_count
= cpu_to_le32(F2FS_CP_PACKS
+
945 cp_payload_blks
+ data_sum_blocks
+
950 set_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
952 clear_ckpt_flags(ckpt
, CP_ORPHAN_PRESENT_FLAG
);
955 set_ckpt_flags(ckpt
, CP_FSCK_FLAG
);
957 /* update SIT/NAT bitmap */
958 get_sit_bitmap(sbi
, __bitmap_ptr(sbi
, SIT_BITMAP
));
959 get_nat_bitmap(sbi
, __bitmap_ptr(sbi
, NAT_BITMAP
));
961 crc32
= f2fs_crc32(ckpt
, le32_to_cpu(ckpt
->checksum_offset
));
962 *((__le32
*)((unsigned char *)ckpt
+
963 le32_to_cpu(ckpt
->checksum_offset
)))
964 = cpu_to_le32(crc32
);
966 start_blk
= __start_cp_addr(sbi
);
968 /* write out checkpoint buffer at block 0 */
969 cp_page
= grab_meta_page(sbi
, start_blk
++);
970 kaddr
= page_address(cp_page
);
971 memcpy(kaddr
, ckpt
, (1 << sbi
->log_blocksize
));
972 set_page_dirty(cp_page
);
973 f2fs_put_page(cp_page
, 1);
975 for (i
= 1; i
< 1 + cp_payload_blks
; i
++) {
976 cp_page
= grab_meta_page(sbi
, start_blk
++);
977 kaddr
= page_address(cp_page
);
978 memcpy(kaddr
, (char *)ckpt
+ i
* F2FS_BLKSIZE
,
979 (1 << sbi
->log_blocksize
));
980 set_page_dirty(cp_page
);
981 f2fs_put_page(cp_page
, 1);
985 write_orphan_inodes(sbi
, start_blk
);
986 start_blk
+= orphan_blocks
;
989 write_data_summaries(sbi
, start_blk
);
990 start_blk
+= data_sum_blocks
;
991 if (cpc
->reason
== CP_UMOUNT
) {
992 write_node_summaries(sbi
, start_blk
);
993 start_blk
+= NR_CURSEG_NODE_TYPE
;
996 /* writeout checkpoint block */
997 cp_page
= grab_meta_page(sbi
, start_blk
);
998 kaddr
= page_address(cp_page
);
999 memcpy(kaddr
, ckpt
, (1 << sbi
->log_blocksize
));
1000 set_page_dirty(cp_page
);
1001 f2fs_put_page(cp_page
, 1);
1003 /* wait for previous submitted node/meta pages writeback */
1004 wait_on_all_pages_writeback(sbi
);
1006 if (unlikely(f2fs_cp_error(sbi
)))
1009 filemap_fdatawait_range(NODE_MAPPING(sbi
), 0, LONG_MAX
);
1010 filemap_fdatawait_range(META_MAPPING(sbi
), 0, LONG_MAX
);
1012 /* update user_block_counts */
1013 sbi
->last_valid_block_count
= sbi
->total_valid_block_count
;
1014 sbi
->alloc_valid_block_count
= 0;
1016 /* Here, we only have one bio having CP pack */
1017 sync_meta_pages(sbi
, META_FLUSH
, LONG_MAX
);
1019 /* wait for previous submitted meta pages writeback */
1020 wait_on_all_pages_writeback(sbi
);
1022 release_dirty_inode(sbi
);
1024 if (unlikely(f2fs_cp_error(sbi
)))
1027 clear_prefree_segments(sbi
);
1028 F2FS_RESET_SB_DIRT(sbi
);
1032 * We guarantee that this checkpoint procedure will not fail.
1034 void write_checkpoint(struct f2fs_sb_info
*sbi
, struct cp_control
*cpc
)
1036 struct f2fs_checkpoint
*ckpt
= F2FS_CKPT(sbi
);
1037 unsigned long long ckpt_ver
;
1039 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "start block_ops");
1041 mutex_lock(&sbi
->cp_mutex
);
1043 if (!sbi
->s_dirty
&& cpc
->reason
!= CP_DISCARD
)
1045 if (unlikely(f2fs_cp_error(sbi
)))
1047 if (block_operations(sbi
))
1050 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "finish block_ops");
1052 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
1053 f2fs_submit_merged_bio(sbi
, NODE
, WRITE
);
1054 f2fs_submit_merged_bio(sbi
, META
, WRITE
);
1057 * update checkpoint pack index
1058 * Increase the version number so that
1059 * SIT entries and seg summaries are written at correct place
1061 ckpt_ver
= cur_cp_version(ckpt
);
1062 ckpt
->checkpoint_ver
= cpu_to_le64(++ckpt_ver
);
1064 /* write cached NAT/SIT entries to NAT/SIT area */
1065 flush_nat_entries(sbi
);
1066 flush_sit_entries(sbi
, cpc
);
1068 /* unlock all the fs_lock[] in do_checkpoint() */
1069 do_checkpoint(sbi
, cpc
);
1071 unblock_operations(sbi
);
1072 stat_inc_cp_count(sbi
->stat_info
);
1074 mutex_unlock(&sbi
->cp_mutex
);
1075 trace_f2fs_write_checkpoint(sbi
->sb
, cpc
->reason
, "finish checkpoint");
1078 void init_ino_entry_info(struct f2fs_sb_info
*sbi
)
1082 for (i
= 0; i
< MAX_INO_ENTRY
; i
++) {
1083 struct inode_management
*im
= &sbi
->im
[i
];
1085 INIT_RADIX_TREE(&im
->ino_root
, GFP_ATOMIC
);
1086 spin_lock_init(&im
->ino_lock
);
1087 INIT_LIST_HEAD(&im
->ino_list
);
1092 * considering 512 blocks in a segment 8 blocks are needed for cp
1093 * and log segment summaries. Remaining blocks are used to keep
1094 * orphan entries with the limitation one reserved segment
1095 * for cp pack we can have max 1020*504 orphan entries
1097 sbi
->max_orphans
= (sbi
->blocks_per_seg
- F2FS_CP_PACKS
-
1098 NR_CURSEG_TYPE
) * F2FS_ORPHANS_PER_BLOCK
;
1101 int __init
create_checkpoint_caches(void)
1103 ino_entry_slab
= f2fs_kmem_cache_create("f2fs_ino_entry",
1104 sizeof(struct ino_entry
));
1105 if (!ino_entry_slab
)
1107 inode_entry_slab
= f2fs_kmem_cache_create("f2fs_dirty_dir_entry",
1108 sizeof(struct dir_inode_entry
));
1109 if (!inode_entry_slab
) {
1110 kmem_cache_destroy(ino_entry_slab
);
1116 void destroy_checkpoint_caches(void)
1118 kmem_cache_destroy(ino_entry_slab
);
1119 kmem_cache_destroy(inode_entry_slab
);