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/f2fs_fs.h>
13 #include <linux/buffer_head.h>
14 #include <linux/mpage.h>
15 #include <linux/writeback.h>
16 #include <linux/backing-dev.h>
17 #include <linux/pagevec.h>
18 #include <linux/blkdev.h>
19 #include <linux/bio.h>
20 #include <linux/prefetch.h>
21 #include <linux/uio.h>
22 #include <linux/cleancache.h>
28 #include <trace/events/f2fs.h>
30 static void f2fs_read_end_io(struct bio
*bio
)
35 if (f2fs_bio_encrypted(bio
)) {
37 f2fs_release_crypto_ctx(bio
->bi_private
);
39 f2fs_end_io_crypto_work(bio
->bi_private
, bio
);
44 bio_for_each_segment_all(bvec
, bio
, i
) {
45 struct page
*page
= bvec
->bv_page
;
48 SetPageUptodate(page
);
50 ClearPageUptodate(page
);
58 static void f2fs_write_end_io(struct bio
*bio
)
60 struct f2fs_sb_info
*sbi
= bio
->bi_private
;
64 bio_for_each_segment_all(bvec
, bio
, i
) {
65 struct page
*page
= bvec
->bv_page
;
67 f2fs_restore_and_release_control_page(&page
);
69 if (unlikely(bio
->bi_error
)) {
70 set_bit(AS_EIO
, &page
->mapping
->flags
);
71 f2fs_stop_checkpoint(sbi
);
73 end_page_writeback(page
);
74 dec_page_count(sbi
, F2FS_WRITEBACK
);
77 if (!get_pages(sbi
, F2FS_WRITEBACK
) && wq_has_sleeper(&sbi
->cp_wait
))
78 wake_up(&sbi
->cp_wait
);
84 * Low-level block read/write IO operations.
86 static struct bio
*__bio_alloc(struct f2fs_sb_info
*sbi
, block_t blk_addr
,
87 int npages
, bool is_read
)
91 bio
= f2fs_bio_alloc(npages
);
93 bio
->bi_bdev
= sbi
->sb
->s_bdev
;
94 bio
->bi_iter
.bi_sector
= SECTOR_FROM_BLOCK(blk_addr
);
95 bio
->bi_end_io
= is_read
? f2fs_read_end_io
: f2fs_write_end_io
;
96 bio
->bi_private
= is_read
? NULL
: sbi
;
101 static void __submit_merged_bio(struct f2fs_bio_info
*io
)
103 struct f2fs_io_info
*fio
= &io
->fio
;
108 if (is_read_io(fio
->rw
))
109 trace_f2fs_submit_read_bio(io
->sbi
->sb
, fio
, io
->bio
);
111 trace_f2fs_submit_write_bio(io
->sbi
->sb
, fio
, io
->bio
);
113 submit_bio(fio
->rw
, io
->bio
);
117 static bool __has_merged_page(struct f2fs_bio_info
*io
, struct inode
*inode
,
118 struct page
*page
, nid_t ino
)
120 struct bio_vec
*bvec
;
127 if (!inode
&& !page
&& !ino
)
130 bio_for_each_segment_all(bvec
, io
->bio
, i
) {
132 if (bvec
->bv_page
->mapping
) {
133 target
= bvec
->bv_page
;
135 struct f2fs_crypto_ctx
*ctx
;
138 ctx
= (struct f2fs_crypto_ctx
*)page_private(
140 target
= ctx
->w
.control_page
;
143 if (inode
&& inode
== target
->mapping
->host
)
145 if (page
&& page
== target
)
147 if (ino
&& ino
== ino_of_node(target
))
154 static bool has_merged_page(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
155 struct page
*page
, nid_t ino
,
158 enum page_type btype
= PAGE_TYPE_OF_BIO(type
);
159 struct f2fs_bio_info
*io
= &sbi
->write_io
[btype
];
162 down_read(&io
->io_rwsem
);
163 ret
= __has_merged_page(io
, inode
, page
, ino
);
164 up_read(&io
->io_rwsem
);
168 static void __f2fs_submit_merged_bio(struct f2fs_sb_info
*sbi
,
169 struct inode
*inode
, struct page
*page
,
170 nid_t ino
, enum page_type type
, int rw
)
172 enum page_type btype
= PAGE_TYPE_OF_BIO(type
);
173 struct f2fs_bio_info
*io
;
175 io
= is_read_io(rw
) ? &sbi
->read_io
: &sbi
->write_io
[btype
];
177 down_write(&io
->io_rwsem
);
179 if (!__has_merged_page(io
, inode
, page
, ino
))
182 /* change META to META_FLUSH in the checkpoint procedure */
183 if (type
>= META_FLUSH
) {
184 io
->fio
.type
= META_FLUSH
;
185 if (test_opt(sbi
, NOBARRIER
))
186 io
->fio
.rw
= WRITE_FLUSH
| REQ_META
| REQ_PRIO
;
188 io
->fio
.rw
= WRITE_FLUSH_FUA
| REQ_META
| REQ_PRIO
;
190 __submit_merged_bio(io
);
192 up_write(&io
->io_rwsem
);
195 void f2fs_submit_merged_bio(struct f2fs_sb_info
*sbi
, enum page_type type
,
198 __f2fs_submit_merged_bio(sbi
, NULL
, NULL
, 0, type
, rw
);
201 void f2fs_submit_merged_bio_cond(struct f2fs_sb_info
*sbi
,
202 struct inode
*inode
, struct page
*page
,
203 nid_t ino
, enum page_type type
, int rw
)
205 if (has_merged_page(sbi
, inode
, page
, ino
, type
))
206 __f2fs_submit_merged_bio(sbi
, inode
, page
, ino
, type
, rw
);
210 * Fill the locked page with data located in the block address.
211 * Return unlocked page.
213 int f2fs_submit_page_bio(struct f2fs_io_info
*fio
)
216 struct page
*page
= fio
->encrypted_page
? fio
->encrypted_page
: fio
->page
;
218 trace_f2fs_submit_page_bio(page
, fio
);
219 f2fs_trace_ios(fio
, 0);
221 /* Allocate a new bio */
222 bio
= __bio_alloc(fio
->sbi
, fio
->blk_addr
, 1, is_read_io(fio
->rw
));
224 if (bio_add_page(bio
, page
, PAGE_CACHE_SIZE
, 0) < PAGE_CACHE_SIZE
) {
229 submit_bio(fio
->rw
, bio
);
233 void f2fs_submit_page_mbio(struct f2fs_io_info
*fio
)
235 struct f2fs_sb_info
*sbi
= fio
->sbi
;
236 enum page_type btype
= PAGE_TYPE_OF_BIO(fio
->type
);
237 struct f2fs_bio_info
*io
;
238 bool is_read
= is_read_io(fio
->rw
);
239 struct page
*bio_page
;
241 io
= is_read
? &sbi
->read_io
: &sbi
->write_io
[btype
];
243 verify_block_addr(sbi
, fio
->blk_addr
);
245 down_write(&io
->io_rwsem
);
248 inc_page_count(sbi
, F2FS_WRITEBACK
);
250 if (io
->bio
&& (io
->last_block_in_bio
!= fio
->blk_addr
- 1 ||
251 io
->fio
.rw
!= fio
->rw
))
252 __submit_merged_bio(io
);
254 if (io
->bio
== NULL
) {
255 int bio_blocks
= MAX_BIO_BLOCKS(sbi
);
257 io
->bio
= __bio_alloc(sbi
, fio
->blk_addr
, bio_blocks
, is_read
);
261 bio_page
= fio
->encrypted_page
? fio
->encrypted_page
: fio
->page
;
263 if (bio_add_page(io
->bio
, bio_page
, PAGE_CACHE_SIZE
, 0) <
265 __submit_merged_bio(io
);
269 io
->last_block_in_bio
= fio
->blk_addr
;
270 f2fs_trace_ios(fio
, 0);
272 up_write(&io
->io_rwsem
);
273 trace_f2fs_submit_page_mbio(fio
->page
, fio
);
277 * Lock ordering for the change of data block address:
280 * update block addresses in the node page
282 void set_data_blkaddr(struct dnode_of_data
*dn
)
284 struct f2fs_node
*rn
;
286 struct page
*node_page
= dn
->node_page
;
287 unsigned int ofs_in_node
= dn
->ofs_in_node
;
289 f2fs_wait_on_page_writeback(node_page
, NODE
, true);
291 rn
= F2FS_NODE(node_page
);
293 /* Get physical address of data block */
294 addr_array
= blkaddr_in_node(rn
);
295 addr_array
[ofs_in_node
] = cpu_to_le32(dn
->data_blkaddr
);
296 if (set_page_dirty(node_page
))
297 dn
->node_changed
= true;
300 int reserve_new_block(struct dnode_of_data
*dn
)
302 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
304 if (unlikely(is_inode_flag_set(F2FS_I(dn
->inode
), FI_NO_ALLOC
)))
306 if (unlikely(!inc_valid_block_count(sbi
, dn
->inode
, 1)))
309 trace_f2fs_reserve_new_block(dn
->inode
, dn
->nid
, dn
->ofs_in_node
);
311 dn
->data_blkaddr
= NEW_ADDR
;
312 set_data_blkaddr(dn
);
313 mark_inode_dirty(dn
->inode
);
318 int f2fs_reserve_block(struct dnode_of_data
*dn
, pgoff_t index
)
320 bool need_put
= dn
->inode_page
? false : true;
323 err
= get_dnode_of_data(dn
, index
, ALLOC_NODE
);
327 if (dn
->data_blkaddr
== NULL_ADDR
)
328 err
= reserve_new_block(dn
);
334 int f2fs_get_block(struct dnode_of_data
*dn
, pgoff_t index
)
336 struct extent_info ei
;
337 struct inode
*inode
= dn
->inode
;
339 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
340 dn
->data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
344 return f2fs_reserve_block(dn
, index
);
347 struct page
*get_read_data_page(struct inode
*inode
, pgoff_t index
,
348 int rw
, bool for_write
)
350 struct address_space
*mapping
= inode
->i_mapping
;
351 struct dnode_of_data dn
;
353 struct extent_info ei
;
355 struct f2fs_io_info fio
= {
356 .sbi
= F2FS_I_SB(inode
),
359 .encrypted_page
= NULL
,
362 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
363 return read_mapping_page(mapping
, index
, NULL
);
365 page
= f2fs_grab_cache_page(mapping
, index
, for_write
);
367 return ERR_PTR(-ENOMEM
);
369 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
370 dn
.data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
374 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
375 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
380 if (unlikely(dn
.data_blkaddr
== NULL_ADDR
)) {
385 if (PageUptodate(page
)) {
391 * A new dentry page is allocated but not able to be written, since its
392 * new inode page couldn't be allocated due to -ENOSPC.
393 * In such the case, its blkaddr can be remained as NEW_ADDR.
394 * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata.
396 if (dn
.data_blkaddr
== NEW_ADDR
) {
397 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
398 SetPageUptodate(page
);
403 fio
.blk_addr
= dn
.data_blkaddr
;
405 err
= f2fs_submit_page_bio(&fio
);
411 f2fs_put_page(page
, 1);
415 struct page
*find_data_page(struct inode
*inode
, pgoff_t index
)
417 struct address_space
*mapping
= inode
->i_mapping
;
420 page
= find_get_page(mapping
, index
);
421 if (page
&& PageUptodate(page
))
423 f2fs_put_page(page
, 0);
425 page
= get_read_data_page(inode
, index
, READ_SYNC
, false);
429 if (PageUptodate(page
))
432 wait_on_page_locked(page
);
433 if (unlikely(!PageUptodate(page
))) {
434 f2fs_put_page(page
, 0);
435 return ERR_PTR(-EIO
);
441 * If it tries to access a hole, return an error.
442 * Because, the callers, functions in dir.c and GC, should be able to know
443 * whether this page exists or not.
445 struct page
*get_lock_data_page(struct inode
*inode
, pgoff_t index
,
448 struct address_space
*mapping
= inode
->i_mapping
;
451 page
= get_read_data_page(inode
, index
, READ_SYNC
, for_write
);
455 /* wait for read completion */
457 if (unlikely(!PageUptodate(page
))) {
458 f2fs_put_page(page
, 1);
459 return ERR_PTR(-EIO
);
461 if (unlikely(page
->mapping
!= mapping
)) {
462 f2fs_put_page(page
, 1);
469 * Caller ensures that this data page is never allocated.
470 * A new zero-filled data page is allocated in the page cache.
472 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
474 * Note that, ipage is set only by make_empty_dir, and if any error occur,
475 * ipage should be released by this function.
477 struct page
*get_new_data_page(struct inode
*inode
,
478 struct page
*ipage
, pgoff_t index
, bool new_i_size
)
480 struct address_space
*mapping
= inode
->i_mapping
;
482 struct dnode_of_data dn
;
485 page
= f2fs_grab_cache_page(mapping
, index
, true);
488 * before exiting, we should make sure ipage will be released
489 * if any error occur.
491 f2fs_put_page(ipage
, 1);
492 return ERR_PTR(-ENOMEM
);
495 set_new_dnode(&dn
, inode
, ipage
, NULL
, 0);
496 err
= f2fs_reserve_block(&dn
, index
);
498 f2fs_put_page(page
, 1);
504 if (PageUptodate(page
))
507 if (dn
.data_blkaddr
== NEW_ADDR
) {
508 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
509 SetPageUptodate(page
);
511 f2fs_put_page(page
, 1);
513 /* if ipage exists, blkaddr should be NEW_ADDR */
514 f2fs_bug_on(F2FS_I_SB(inode
), ipage
);
515 page
= get_lock_data_page(inode
, index
, true);
520 if (new_i_size
&& i_size_read(inode
) <
521 ((loff_t
)(index
+ 1) << PAGE_CACHE_SHIFT
)) {
522 i_size_write(inode
, ((loff_t
)(index
+ 1) << PAGE_CACHE_SHIFT
));
523 /* Only the directory inode sets new_i_size */
524 set_inode_flag(F2FS_I(inode
), FI_UPDATE_DIR
);
529 static int __allocate_data_block(struct dnode_of_data
*dn
)
531 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
532 struct f2fs_summary sum
;
534 int seg
= CURSEG_WARM_DATA
;
537 if (unlikely(is_inode_flag_set(F2FS_I(dn
->inode
), FI_NO_ALLOC
)))
540 dn
->data_blkaddr
= datablock_addr(dn
->node_page
, dn
->ofs_in_node
);
541 if (dn
->data_blkaddr
== NEW_ADDR
)
544 if (unlikely(!inc_valid_block_count(sbi
, dn
->inode
, 1)))
548 get_node_info(sbi
, dn
->nid
, &ni
);
549 set_summary(&sum
, dn
->nid
, dn
->ofs_in_node
, ni
.version
);
551 if (dn
->ofs_in_node
== 0 && dn
->inode_page
== dn
->node_page
)
552 seg
= CURSEG_DIRECT_IO
;
554 allocate_data_block(sbi
, NULL
, dn
->data_blkaddr
, &dn
->data_blkaddr
,
556 set_data_blkaddr(dn
);
559 fofs
= start_bidx_of_node(ofs_of_node(dn
->node_page
), dn
->inode
) +
561 if (i_size_read(dn
->inode
) < ((loff_t
)(fofs
+ 1) << PAGE_CACHE_SHIFT
))
562 i_size_write(dn
->inode
,
563 ((loff_t
)(fofs
+ 1) << PAGE_CACHE_SHIFT
));
567 static int __allocate_data_blocks(struct inode
*inode
, loff_t offset
,
570 struct f2fs_map_blocks map
;
572 map
.m_lblk
= F2FS_BYTES_TO_BLK(offset
);
573 map
.m_len
= F2FS_BYTES_TO_BLK(count
);
574 map
.m_next_pgofs
= NULL
;
576 return f2fs_map_blocks(inode
, &map
, 1, F2FS_GET_BLOCK_DIO
);
580 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
581 * f2fs_map_blocks structure.
582 * If original data blocks are allocated, then give them to blockdev.
584 * a. preallocate requested block addresses
585 * b. do not use extent cache for better performance
586 * c. give the block addresses to blockdev
588 int f2fs_map_blocks(struct inode
*inode
, struct f2fs_map_blocks
*map
,
589 int create
, int flag
)
591 unsigned int maxblocks
= map
->m_len
;
592 struct dnode_of_data dn
;
593 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
594 int mode
= create
? ALLOC_NODE
: LOOKUP_NODE_RA
;
595 pgoff_t pgofs
, end_offset
;
596 int err
= 0, ofs
= 1;
597 struct extent_info ei
;
598 bool allocated
= false;
604 /* it only supports block size == page size */
605 pgofs
= (pgoff_t
)map
->m_lblk
;
607 if (f2fs_lookup_extent_cache(inode
, pgofs
, &ei
)) {
608 map
->m_pblk
= ei
.blk
+ pgofs
- ei
.fofs
;
609 map
->m_len
= min((pgoff_t
)maxblocks
, ei
.fofs
+ ei
.len
- pgofs
);
610 map
->m_flags
= F2FS_MAP_MAPPED
;
618 /* When reading holes, we need its node page */
619 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
620 err
= get_dnode_of_data(&dn
, pgofs
, mode
);
622 if (err
== -ENOENT
) {
624 if (map
->m_next_pgofs
)
626 get_next_page_offset(&dn
, pgofs
);
631 end_offset
= ADDRS_PER_PAGE(dn
.node_page
, inode
);
634 blkaddr
= datablock_addr(dn
.node_page
, dn
.ofs_in_node
);
636 if (blkaddr
== NEW_ADDR
|| blkaddr
== NULL_ADDR
) {
638 if (unlikely(f2fs_cp_error(sbi
))) {
642 err
= __allocate_data_block(&dn
);
646 map
->m_flags
= F2FS_MAP_NEW
;
647 blkaddr
= dn
.data_blkaddr
;
649 if (flag
== F2FS_GET_BLOCK_FIEMAP
&&
650 blkaddr
== NULL_ADDR
) {
651 if (map
->m_next_pgofs
)
652 *map
->m_next_pgofs
= pgofs
+ 1;
654 if (flag
!= F2FS_GET_BLOCK_FIEMAP
||
655 blkaddr
!= NEW_ADDR
) {
656 if (flag
== F2FS_GET_BLOCK_BMAP
)
663 if (map
->m_len
== 0) {
664 /* preallocated unwritten block should be mapped for fiemap. */
665 if (blkaddr
== NEW_ADDR
)
666 map
->m_flags
|= F2FS_MAP_UNWRITTEN
;
667 map
->m_flags
|= F2FS_MAP_MAPPED
;
669 map
->m_pblk
= blkaddr
;
671 } else if ((map
->m_pblk
!= NEW_ADDR
&&
672 blkaddr
== (map
->m_pblk
+ ofs
)) ||
673 (map
->m_pblk
== NEW_ADDR
&& blkaddr
== NEW_ADDR
)) {
683 if (map
->m_len
< maxblocks
) {
684 if (dn
.ofs_in_node
< end_offset
)
688 sync_inode_page(&dn
);
693 f2fs_balance_fs(sbi
, allocated
);
701 sync_inode_page(&dn
);
706 f2fs_balance_fs(sbi
, allocated
);
709 trace_f2fs_map_blocks(inode
, map
, err
);
713 static int __get_data_block(struct inode
*inode
, sector_t iblock
,
714 struct buffer_head
*bh
, int create
, int flag
,
717 struct f2fs_map_blocks map
;
721 map
.m_len
= bh
->b_size
>> inode
->i_blkbits
;
722 map
.m_next_pgofs
= next_pgofs
;
724 ret
= f2fs_map_blocks(inode
, &map
, create
, flag
);
726 map_bh(bh
, inode
->i_sb
, map
.m_pblk
);
727 bh
->b_state
= (bh
->b_state
& ~F2FS_MAP_FLAGS
) | map
.m_flags
;
728 bh
->b_size
= map
.m_len
<< inode
->i_blkbits
;
733 static int get_data_block(struct inode
*inode
, sector_t iblock
,
734 struct buffer_head
*bh_result
, int create
, int flag
,
737 return __get_data_block(inode
, iblock
, bh_result
, create
,
741 static int get_data_block_dio(struct inode
*inode
, sector_t iblock
,
742 struct buffer_head
*bh_result
, int create
)
744 return __get_data_block(inode
, iblock
, bh_result
, create
,
745 F2FS_GET_BLOCK_DIO
, NULL
);
748 static int get_data_block_bmap(struct inode
*inode
, sector_t iblock
,
749 struct buffer_head
*bh_result
, int create
)
751 /* Block number less than F2FS MAX BLOCKS */
752 if (unlikely(iblock
>= F2FS_I_SB(inode
)->max_file_blocks
))
755 return __get_data_block(inode
, iblock
, bh_result
, create
,
756 F2FS_GET_BLOCK_BMAP
, NULL
);
759 static inline sector_t
logical_to_blk(struct inode
*inode
, loff_t offset
)
761 return (offset
>> inode
->i_blkbits
);
764 static inline loff_t
blk_to_logical(struct inode
*inode
, sector_t blk
)
766 return (blk
<< inode
->i_blkbits
);
769 int f2fs_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
772 struct buffer_head map_bh
;
773 sector_t start_blk
, last_blk
;
776 u64 logical
= 0, phys
= 0, size
= 0;
780 ret
= fiemap_check_flags(fieinfo
, FIEMAP_FLAG_SYNC
);
784 if (f2fs_has_inline_data(inode
)) {
785 ret
= f2fs_inline_data_fiemap(inode
, fieinfo
, start
, len
);
792 isize
= i_size_read(inode
);
796 if (start
+ len
> isize
)
799 if (logical_to_blk(inode
, len
) == 0)
800 len
= blk_to_logical(inode
, 1);
802 start_blk
= logical_to_blk(inode
, start
);
803 last_blk
= logical_to_blk(inode
, start
+ len
- 1);
806 memset(&map_bh
, 0, sizeof(struct buffer_head
));
809 ret
= get_data_block(inode
, start_blk
, &map_bh
, 0,
810 F2FS_GET_BLOCK_FIEMAP
, &next_pgofs
);
815 if (!buffer_mapped(&map_bh
)) {
816 start_blk
= next_pgofs
;
817 /* Go through holes util pass the EOF */
818 if (blk_to_logical(inode
, start_blk
) < isize
)
820 /* Found a hole beyond isize means no more extents.
821 * Note that the premise is that filesystems don't
822 * punch holes beyond isize and keep size unchanged.
824 flags
|= FIEMAP_EXTENT_LAST
;
828 if (f2fs_encrypted_inode(inode
))
829 flags
|= FIEMAP_EXTENT_DATA_ENCRYPTED
;
831 ret
= fiemap_fill_next_extent(fieinfo
, logical
,
835 if (start_blk
> last_blk
|| ret
)
838 logical
= blk_to_logical(inode
, start_blk
);
839 phys
= blk_to_logical(inode
, map_bh
.b_blocknr
);
840 size
= map_bh
.b_size
;
842 if (buffer_unwritten(&map_bh
))
843 flags
= FIEMAP_EXTENT_UNWRITTEN
;
845 start_blk
+= logical_to_blk(inode
, size
);
849 if (fatal_signal_pending(current
))
862 * This function was originally taken from fs/mpage.c, and customized for f2fs.
863 * Major change was from block_size == page_size in f2fs by default.
865 static int f2fs_mpage_readpages(struct address_space
*mapping
,
866 struct list_head
*pages
, struct page
*page
,
869 struct bio
*bio
= NULL
;
871 sector_t last_block_in_bio
= 0;
872 struct inode
*inode
= mapping
->host
;
873 const unsigned blkbits
= inode
->i_blkbits
;
874 const unsigned blocksize
= 1 << blkbits
;
875 sector_t block_in_file
;
877 sector_t last_block_in_file
;
879 struct block_device
*bdev
= inode
->i_sb
->s_bdev
;
880 struct f2fs_map_blocks map
;
886 map
.m_next_pgofs
= NULL
;
888 for (page_idx
= 0; nr_pages
; page_idx
++, nr_pages
--) {
890 prefetchw(&page
->flags
);
892 page
= list_entry(pages
->prev
, struct page
, lru
);
893 list_del(&page
->lru
);
894 if (add_to_page_cache_lru(page
, mapping
,
895 page
->index
, GFP_KERNEL
))
899 block_in_file
= (sector_t
)page
->index
;
900 last_block
= block_in_file
+ nr_pages
;
901 last_block_in_file
= (i_size_read(inode
) + blocksize
- 1) >>
903 if (last_block
> last_block_in_file
)
904 last_block
= last_block_in_file
;
907 * Map blocks using the previous result first.
909 if ((map
.m_flags
& F2FS_MAP_MAPPED
) &&
910 block_in_file
> map
.m_lblk
&&
911 block_in_file
< (map
.m_lblk
+ map
.m_len
))
915 * Then do more f2fs_map_blocks() calls until we are
916 * done with this page.
920 if (block_in_file
< last_block
) {
921 map
.m_lblk
= block_in_file
;
922 map
.m_len
= last_block
- block_in_file
;
924 if (f2fs_map_blocks(inode
, &map
, 0,
925 F2FS_GET_BLOCK_READ
))
929 if ((map
.m_flags
& F2FS_MAP_MAPPED
)) {
930 block_nr
= map
.m_pblk
+ block_in_file
- map
.m_lblk
;
931 SetPageMappedToDisk(page
);
933 if (!PageUptodate(page
) && !cleancache_get_page(page
)) {
934 SetPageUptodate(page
);
938 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
939 SetPageUptodate(page
);
945 * This page will go to BIO. Do we need to send this
948 if (bio
&& (last_block_in_bio
!= block_nr
- 1)) {
950 submit_bio(READ
, bio
);
954 struct f2fs_crypto_ctx
*ctx
= NULL
;
956 if (f2fs_encrypted_inode(inode
) &&
957 S_ISREG(inode
->i_mode
)) {
959 ctx
= f2fs_get_crypto_ctx(inode
);
963 /* wait the page to be moved by cleaning */
964 f2fs_wait_on_encrypted_page_writeback(
965 F2FS_I_SB(inode
), block_nr
);
968 bio
= bio_alloc(GFP_KERNEL
,
969 min_t(int, nr_pages
, BIO_MAX_PAGES
));
972 f2fs_release_crypto_ctx(ctx
);
976 bio
->bi_iter
.bi_sector
= SECTOR_FROM_BLOCK(block_nr
);
977 bio
->bi_end_io
= f2fs_read_end_io
;
978 bio
->bi_private
= ctx
;
981 if (bio_add_page(bio
, page
, blocksize
, 0) < blocksize
)
982 goto submit_and_realloc
;
984 last_block_in_bio
= block_nr
;
988 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
993 submit_bio(READ
, bio
);
999 page_cache_release(page
);
1001 BUG_ON(pages
&& !list_empty(pages
));
1003 submit_bio(READ
, bio
);
1007 static int f2fs_read_data_page(struct file
*file
, struct page
*page
)
1009 struct inode
*inode
= page
->mapping
->host
;
1012 trace_f2fs_readpage(page
, DATA
);
1014 /* If the file has inline data, try to read it directly */
1015 if (f2fs_has_inline_data(inode
))
1016 ret
= f2fs_read_inline_data(inode
, page
);
1018 ret
= f2fs_mpage_readpages(page
->mapping
, NULL
, page
, 1);
1022 static int f2fs_read_data_pages(struct file
*file
,
1023 struct address_space
*mapping
,
1024 struct list_head
*pages
, unsigned nr_pages
)
1026 struct inode
*inode
= file
->f_mapping
->host
;
1027 struct page
*page
= list_entry(pages
->prev
, struct page
, lru
);
1029 trace_f2fs_readpages(inode
, page
, nr_pages
);
1031 /* If the file has inline data, skip readpages */
1032 if (f2fs_has_inline_data(inode
))
1035 return f2fs_mpage_readpages(mapping
, pages
, NULL
, nr_pages
);
1038 int do_write_data_page(struct f2fs_io_info
*fio
)
1040 struct page
*page
= fio
->page
;
1041 struct inode
*inode
= page
->mapping
->host
;
1042 struct dnode_of_data dn
;
1045 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
1046 err
= get_dnode_of_data(&dn
, page
->index
, LOOKUP_NODE
);
1050 fio
->blk_addr
= dn
.data_blkaddr
;
1052 /* This page is already truncated */
1053 if (fio
->blk_addr
== NULL_ADDR
) {
1054 ClearPageUptodate(page
);
1058 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
)) {
1060 /* wait for GCed encrypted page writeback */
1061 f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode
),
1064 fio
->encrypted_page
= f2fs_encrypt(inode
, fio
->page
);
1065 if (IS_ERR(fio
->encrypted_page
)) {
1066 err
= PTR_ERR(fio
->encrypted_page
);
1071 set_page_writeback(page
);
1074 * If current allocation needs SSR,
1075 * it had better in-place writes for updated data.
1077 if (unlikely(fio
->blk_addr
!= NEW_ADDR
&&
1078 !is_cold_data(page
) &&
1079 !IS_ATOMIC_WRITTEN_PAGE(page
) &&
1080 need_inplace_update(inode
))) {
1081 rewrite_data_page(fio
);
1082 set_inode_flag(F2FS_I(inode
), FI_UPDATE_WRITE
);
1083 trace_f2fs_do_write_data_page(page
, IPU
);
1085 write_data_page(&dn
, fio
);
1086 set_data_blkaddr(&dn
);
1087 f2fs_update_extent_cache(&dn
);
1088 trace_f2fs_do_write_data_page(page
, OPU
);
1089 set_inode_flag(F2FS_I(inode
), FI_APPEND_WRITE
);
1090 if (page
->index
== 0)
1091 set_inode_flag(F2FS_I(inode
), FI_FIRST_BLOCK_WRITTEN
);
1094 f2fs_put_dnode(&dn
);
1098 static int f2fs_write_data_page(struct page
*page
,
1099 struct writeback_control
*wbc
)
1101 struct inode
*inode
= page
->mapping
->host
;
1102 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1103 loff_t i_size
= i_size_read(inode
);
1104 const pgoff_t end_index
= ((unsigned long long) i_size
)
1105 >> PAGE_CACHE_SHIFT
;
1106 unsigned offset
= 0;
1107 bool need_balance_fs
= false;
1109 struct f2fs_io_info fio
= {
1112 .rw
= (wbc
->sync_mode
== WB_SYNC_ALL
) ? WRITE_SYNC
: WRITE
,
1114 .encrypted_page
= NULL
,
1117 trace_f2fs_writepage(page
, DATA
);
1119 if (page
->index
< end_index
)
1123 * If the offset is out-of-range of file size,
1124 * this page does not have to be written to disk.
1126 offset
= i_size
& (PAGE_CACHE_SIZE
- 1);
1127 if ((page
->index
>= end_index
+ 1) || !offset
)
1130 zero_user_segment(page
, offset
, PAGE_CACHE_SIZE
);
1132 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
1134 if (f2fs_is_drop_cache(inode
))
1136 if (f2fs_is_volatile_file(inode
) && !wbc
->for_reclaim
&&
1137 available_free_memory(sbi
, BASE_CHECK
))
1140 /* Dentry blocks are controlled by checkpoint */
1141 if (S_ISDIR(inode
->i_mode
)) {
1142 if (unlikely(f2fs_cp_error(sbi
)))
1144 err
= do_write_data_page(&fio
);
1148 /* we should bypass data pages to proceed the kworkder jobs */
1149 if (unlikely(f2fs_cp_error(sbi
))) {
1154 if (!wbc
->for_reclaim
)
1155 need_balance_fs
= true;
1156 else if (has_not_enough_free_secs(sbi
, 0))
1161 if (f2fs_has_inline_data(inode
))
1162 err
= f2fs_write_inline_data(inode
, page
);
1164 err
= do_write_data_page(&fio
);
1165 f2fs_unlock_op(sbi
);
1167 if (err
&& err
!= -ENOENT
)
1170 clear_cold_data(page
);
1172 inode_dec_dirty_pages(inode
);
1174 ClearPageUptodate(page
);
1176 if (wbc
->for_reclaim
) {
1177 f2fs_submit_merged_bio_cond(sbi
, NULL
, page
, 0, DATA
, WRITE
);
1178 remove_dirty_inode(inode
);
1182 f2fs_balance_fs(sbi
, need_balance_fs
);
1184 if (unlikely(f2fs_cp_error(sbi
)))
1185 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
1190 redirty_page_for_writepage(wbc
, page
);
1191 return AOP_WRITEPAGE_ACTIVATE
;
1194 static int __f2fs_writepage(struct page
*page
, struct writeback_control
*wbc
,
1197 struct address_space
*mapping
= data
;
1198 int ret
= mapping
->a_ops
->writepage(page
, wbc
);
1199 mapping_set_error(mapping
, ret
);
1204 * This function was copied from write_cche_pages from mm/page-writeback.c.
1205 * The major change is making write step of cold data page separately from
1206 * warm/hot data page.
1208 static int f2fs_write_cache_pages(struct address_space
*mapping
,
1209 struct writeback_control
*wbc
, writepage_t writepage
,
1214 struct pagevec pvec
;
1216 pgoff_t
uninitialized_var(writeback_index
);
1218 pgoff_t end
; /* Inclusive */
1221 int range_whole
= 0;
1225 pagevec_init(&pvec
, 0);
1227 if (wbc
->range_cyclic
) {
1228 writeback_index
= mapping
->writeback_index
; /* prev offset */
1229 index
= writeback_index
;
1236 index
= wbc
->range_start
>> PAGE_CACHE_SHIFT
;
1237 end
= wbc
->range_end
>> PAGE_CACHE_SHIFT
;
1238 if (wbc
->range_start
== 0 && wbc
->range_end
== LLONG_MAX
)
1240 cycled
= 1; /* ignore range_cyclic tests */
1242 if (wbc
->sync_mode
== WB_SYNC_ALL
|| wbc
->tagged_writepages
)
1243 tag
= PAGECACHE_TAG_TOWRITE
;
1245 tag
= PAGECACHE_TAG_DIRTY
;
1247 if (wbc
->sync_mode
== WB_SYNC_ALL
|| wbc
->tagged_writepages
)
1248 tag_pages_for_writeback(mapping
, index
, end
);
1250 while (!done
&& (index
<= end
)) {
1253 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &index
, tag
,
1254 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
- 1) + 1);
1258 for (i
= 0; i
< nr_pages
; i
++) {
1259 struct page
*page
= pvec
.pages
[i
];
1261 if (page
->index
> end
) {
1266 done_index
= page
->index
;
1270 if (unlikely(page
->mapping
!= mapping
)) {
1276 if (!PageDirty(page
)) {
1277 /* someone wrote it for us */
1278 goto continue_unlock
;
1281 if (step
== is_cold_data(page
))
1282 goto continue_unlock
;
1284 if (PageWriteback(page
)) {
1285 if (wbc
->sync_mode
!= WB_SYNC_NONE
)
1286 f2fs_wait_on_page_writeback(page
,
1289 goto continue_unlock
;
1292 BUG_ON(PageWriteback(page
));
1293 if (!clear_page_dirty_for_io(page
))
1294 goto continue_unlock
;
1296 ret
= (*writepage
)(page
, wbc
, data
);
1297 if (unlikely(ret
)) {
1298 if (ret
== AOP_WRITEPAGE_ACTIVATE
) {
1302 done_index
= page
->index
+ 1;
1308 if (--wbc
->nr_to_write
<= 0 &&
1309 wbc
->sync_mode
== WB_SYNC_NONE
) {
1314 pagevec_release(&pvec
);
1323 if (!cycled
&& !done
) {
1326 end
= writeback_index
- 1;
1329 if (wbc
->range_cyclic
|| (range_whole
&& wbc
->nr_to_write
> 0))
1330 mapping
->writeback_index
= done_index
;
1335 static int f2fs_write_data_pages(struct address_space
*mapping
,
1336 struct writeback_control
*wbc
)
1338 struct inode
*inode
= mapping
->host
;
1339 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1340 bool locked
= false;
1344 /* deal with chardevs and other special file */
1345 if (!mapping
->a_ops
->writepage
)
1348 /* skip writing if there is no dirty page in this inode */
1349 if (!get_dirty_pages(inode
) && wbc
->sync_mode
== WB_SYNC_NONE
)
1352 if (S_ISDIR(inode
->i_mode
) && wbc
->sync_mode
== WB_SYNC_NONE
&&
1353 get_dirty_pages(inode
) < nr_pages_to_skip(sbi
, DATA
) &&
1354 available_free_memory(sbi
, DIRTY_DENTS
))
1357 /* skip writing during file defragment */
1358 if (is_inode_flag_set(F2FS_I(inode
), FI_DO_DEFRAG
))
1361 /* during POR, we don't need to trigger writepage at all. */
1362 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
1365 trace_f2fs_writepages(mapping
->host
, wbc
, DATA
);
1367 diff
= nr_pages_to_write(sbi
, DATA
, wbc
);
1369 if (!S_ISDIR(inode
->i_mode
) && wbc
->sync_mode
== WB_SYNC_ALL
) {
1370 mutex_lock(&sbi
->writepages
);
1373 ret
= f2fs_write_cache_pages(mapping
, wbc
, __f2fs_writepage
, mapping
);
1374 f2fs_submit_merged_bio_cond(sbi
, inode
, NULL
, 0, DATA
, WRITE
);
1376 mutex_unlock(&sbi
->writepages
);
1378 remove_dirty_inode(inode
);
1380 wbc
->nr_to_write
= max((long)0, wbc
->nr_to_write
- diff
);
1384 wbc
->pages_skipped
+= get_dirty_pages(inode
);
1385 trace_f2fs_writepages(mapping
->host
, wbc
, DATA
);
1389 static void f2fs_write_failed(struct address_space
*mapping
, loff_t to
)
1391 struct inode
*inode
= mapping
->host
;
1392 loff_t i_size
= i_size_read(inode
);
1395 truncate_pagecache(inode
, i_size
);
1396 truncate_blocks(inode
, i_size
, true);
1400 static int prepare_write_begin(struct f2fs_sb_info
*sbi
,
1401 struct page
*page
, loff_t pos
, unsigned len
,
1402 block_t
*blk_addr
, bool *node_changed
)
1404 struct inode
*inode
= page
->mapping
->host
;
1405 pgoff_t index
= page
->index
;
1406 struct dnode_of_data dn
;
1408 bool locked
= false;
1409 struct extent_info ei
;
1412 if (f2fs_has_inline_data(inode
) ||
1413 (pos
& PAGE_CACHE_MASK
) >= i_size_read(inode
)) {
1418 /* check inline_data */
1419 ipage
= get_node_page(sbi
, inode
->i_ino
);
1420 if (IS_ERR(ipage
)) {
1421 err
= PTR_ERR(ipage
);
1425 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
1427 if (f2fs_has_inline_data(inode
)) {
1428 if (pos
+ len
<= MAX_INLINE_DATA
) {
1429 read_inline_data(page
, ipage
);
1430 set_inode_flag(F2FS_I(inode
), FI_DATA_EXIST
);
1431 set_inline_node(ipage
);
1433 err
= f2fs_convert_inline_page(&dn
, page
);
1436 if (dn
.data_blkaddr
== NULL_ADDR
)
1437 err
= f2fs_get_block(&dn
, index
);
1439 } else if (locked
) {
1440 err
= f2fs_get_block(&dn
, index
);
1442 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
1443 dn
.data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
1446 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
1447 if (err
|| (!err
&& dn
.data_blkaddr
== NULL_ADDR
)) {
1448 f2fs_put_dnode(&dn
);
1456 /* convert_inline_page can make node_changed */
1457 *blk_addr
= dn
.data_blkaddr
;
1458 *node_changed
= dn
.node_changed
;
1460 f2fs_put_dnode(&dn
);
1463 f2fs_unlock_op(sbi
);
1467 static int f2fs_write_begin(struct file
*file
, struct address_space
*mapping
,
1468 loff_t pos
, unsigned len
, unsigned flags
,
1469 struct page
**pagep
, void **fsdata
)
1471 struct inode
*inode
= mapping
->host
;
1472 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1473 struct page
*page
= NULL
;
1474 pgoff_t index
= ((unsigned long long) pos
) >> PAGE_CACHE_SHIFT
;
1475 bool need_balance
= false;
1476 block_t blkaddr
= NULL_ADDR
;
1479 trace_f2fs_write_begin(inode
, pos
, len
, flags
);
1482 * We should check this at this moment to avoid deadlock on inode page
1483 * and #0 page. The locking rule for inline_data conversion should be:
1484 * lock_page(page #0) -> lock_page(inode_page)
1487 err
= f2fs_convert_inline_inode(inode
);
1492 page
= grab_cache_page_write_begin(mapping
, index
, flags
);
1500 err
= prepare_write_begin(sbi
, page
, pos
, len
,
1501 &blkaddr
, &need_balance
);
1505 if (need_balance
&& has_not_enough_free_secs(sbi
, 0)) {
1507 f2fs_balance_fs(sbi
, true);
1509 if (page
->mapping
!= mapping
) {
1510 /* The page got truncated from under us */
1511 f2fs_put_page(page
, 1);
1516 f2fs_wait_on_page_writeback(page
, DATA
, false);
1518 /* wait for GCed encrypted page writeback */
1519 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
1520 f2fs_wait_on_encrypted_page_writeback(sbi
, blkaddr
);
1522 if (len
== PAGE_CACHE_SIZE
)
1524 if (PageUptodate(page
))
1527 if ((pos
& PAGE_CACHE_MASK
) >= i_size_read(inode
)) {
1528 unsigned start
= pos
& (PAGE_CACHE_SIZE
- 1);
1529 unsigned end
= start
+ len
;
1531 /* Reading beyond i_size is simple: memset to zero */
1532 zero_user_segments(page
, 0, start
, end
, PAGE_CACHE_SIZE
);
1536 if (blkaddr
== NEW_ADDR
) {
1537 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
1539 struct f2fs_io_info fio
= {
1543 .blk_addr
= blkaddr
,
1545 .encrypted_page
= NULL
,
1547 err
= f2fs_submit_page_bio(&fio
);
1552 if (unlikely(!PageUptodate(page
))) {
1556 if (unlikely(page
->mapping
!= mapping
)) {
1557 f2fs_put_page(page
, 1);
1561 /* avoid symlink page */
1562 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
)) {
1563 err
= f2fs_decrypt_one(inode
, page
);
1569 SetPageUptodate(page
);
1571 clear_cold_data(page
);
1575 f2fs_put_page(page
, 1);
1576 f2fs_write_failed(mapping
, pos
+ len
);
1580 static int f2fs_write_end(struct file
*file
,
1581 struct address_space
*mapping
,
1582 loff_t pos
, unsigned len
, unsigned copied
,
1583 struct page
*page
, void *fsdata
)
1585 struct inode
*inode
= page
->mapping
->host
;
1587 trace_f2fs_write_end(inode
, pos
, len
, copied
);
1589 set_page_dirty(page
);
1591 if (pos
+ copied
> i_size_read(inode
)) {
1592 i_size_write(inode
, pos
+ copied
);
1593 mark_inode_dirty(inode
);
1596 f2fs_put_page(page
, 1);
1597 f2fs_update_time(F2FS_I_SB(inode
), REQ_TIME
);
1601 static int check_direct_IO(struct inode
*inode
, struct iov_iter
*iter
,
1604 unsigned blocksize_mask
= inode
->i_sb
->s_blocksize
- 1;
1606 if (offset
& blocksize_mask
)
1609 if (iov_iter_alignment(iter
) & blocksize_mask
)
1615 static ssize_t
f2fs_direct_IO(struct kiocb
*iocb
, struct iov_iter
*iter
,
1618 struct file
*file
= iocb
->ki_filp
;
1619 struct address_space
*mapping
= file
->f_mapping
;
1620 struct inode
*inode
= mapping
->host
;
1621 size_t count
= iov_iter_count(iter
);
1624 /* we don't need to use inline_data strictly */
1625 err
= f2fs_convert_inline_inode(inode
);
1629 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
1632 err
= check_direct_IO(inode
, iter
, offset
);
1636 trace_f2fs_direct_IO_enter(inode
, offset
, count
, iov_iter_rw(iter
));
1638 if (iov_iter_rw(iter
) == WRITE
) {
1639 err
= __allocate_data_blocks(inode
, offset
, count
);
1644 err
= blockdev_direct_IO(iocb
, inode
, iter
, offset
, get_data_block_dio
);
1646 if (err
< 0 && iov_iter_rw(iter
) == WRITE
)
1647 f2fs_write_failed(mapping
, offset
+ count
);
1649 trace_f2fs_direct_IO_exit(inode
, offset
, count
, iov_iter_rw(iter
), err
);
1654 void f2fs_invalidate_page(struct page
*page
, unsigned int offset
,
1655 unsigned int length
)
1657 struct inode
*inode
= page
->mapping
->host
;
1658 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1660 if (inode
->i_ino
>= F2FS_ROOT_INO(sbi
) &&
1661 (offset
% PAGE_CACHE_SIZE
|| length
!= PAGE_CACHE_SIZE
))
1664 if (PageDirty(page
)) {
1665 if (inode
->i_ino
== F2FS_META_INO(sbi
))
1666 dec_page_count(sbi
, F2FS_DIRTY_META
);
1667 else if (inode
->i_ino
== F2FS_NODE_INO(sbi
))
1668 dec_page_count(sbi
, F2FS_DIRTY_NODES
);
1670 inode_dec_dirty_pages(inode
);
1673 /* This is atomic written page, keep Private */
1674 if (IS_ATOMIC_WRITTEN_PAGE(page
))
1677 ClearPagePrivate(page
);
1680 int f2fs_release_page(struct page
*page
, gfp_t wait
)
1682 /* If this is dirty page, keep PagePrivate */
1683 if (PageDirty(page
))
1686 /* This is atomic written page, keep Private */
1687 if (IS_ATOMIC_WRITTEN_PAGE(page
))
1690 ClearPagePrivate(page
);
1694 static int f2fs_set_data_page_dirty(struct page
*page
)
1696 struct address_space
*mapping
= page
->mapping
;
1697 struct inode
*inode
= mapping
->host
;
1699 trace_f2fs_set_page_dirty(page
, DATA
);
1701 SetPageUptodate(page
);
1703 if (f2fs_is_atomic_file(inode
)) {
1704 if (!IS_ATOMIC_WRITTEN_PAGE(page
)) {
1705 register_inmem_page(inode
, page
);
1709 * Previously, this page has been registered, we just
1715 if (!PageDirty(page
)) {
1716 __set_page_dirty_nobuffers(page
);
1717 update_dirty_page(inode
, page
);
1723 static sector_t
f2fs_bmap(struct address_space
*mapping
, sector_t block
)
1725 struct inode
*inode
= mapping
->host
;
1727 if (f2fs_has_inline_data(inode
))
1730 /* make sure allocating whole blocks */
1731 if (mapping_tagged(mapping
, PAGECACHE_TAG_DIRTY
))
1732 filemap_write_and_wait(mapping
);
1734 return generic_block_bmap(mapping
, block
, get_data_block_bmap
);
1737 const struct address_space_operations f2fs_dblock_aops
= {
1738 .readpage
= f2fs_read_data_page
,
1739 .readpages
= f2fs_read_data_pages
,
1740 .writepage
= f2fs_write_data_page
,
1741 .writepages
= f2fs_write_data_pages
,
1742 .write_begin
= f2fs_write_begin
,
1743 .write_end
= f2fs_write_end
,
1744 .set_page_dirty
= f2fs_set_data_page_dirty
,
1745 .invalidatepage
= f2fs_invalidate_page
,
1746 .releasepage
= f2fs_release_page
,
1747 .direct_IO
= f2fs_direct_IO
,