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
->new_blkaddr
, 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 if (fio
->old_blkaddr
!= NEW_ADDR
)
244 verify_block_addr(sbi
, fio
->old_blkaddr
);
245 verify_block_addr(sbi
, fio
->new_blkaddr
);
247 down_write(&io
->io_rwsem
);
250 inc_page_count(sbi
, F2FS_WRITEBACK
);
252 if (io
->bio
&& (io
->last_block_in_bio
!= fio
->new_blkaddr
- 1 ||
253 io
->fio
.rw
!= fio
->rw
))
254 __submit_merged_bio(io
);
256 if (io
->bio
== NULL
) {
257 int bio_blocks
= MAX_BIO_BLOCKS(sbi
);
259 io
->bio
= __bio_alloc(sbi
, fio
->new_blkaddr
,
260 bio_blocks
, is_read
);
264 bio_page
= fio
->encrypted_page
? fio
->encrypted_page
: fio
->page
;
266 if (bio_add_page(io
->bio
, bio_page
, PAGE_CACHE_SIZE
, 0) <
268 __submit_merged_bio(io
);
272 io
->last_block_in_bio
= fio
->new_blkaddr
;
273 f2fs_trace_ios(fio
, 0);
275 up_write(&io
->io_rwsem
);
276 trace_f2fs_submit_page_mbio(fio
->page
, fio
);
280 * Lock ordering for the change of data block address:
283 * update block addresses in the node page
285 void set_data_blkaddr(struct dnode_of_data
*dn
)
287 struct f2fs_node
*rn
;
289 struct page
*node_page
= dn
->node_page
;
290 unsigned int ofs_in_node
= dn
->ofs_in_node
;
292 f2fs_wait_on_page_writeback(node_page
, NODE
, true);
294 rn
= F2FS_NODE(node_page
);
296 /* Get physical address of data block */
297 addr_array
= blkaddr_in_node(rn
);
298 addr_array
[ofs_in_node
] = cpu_to_le32(dn
->data_blkaddr
);
299 if (set_page_dirty(node_page
))
300 dn
->node_changed
= true;
303 void f2fs_update_data_blkaddr(struct dnode_of_data
*dn
, block_t blkaddr
)
305 dn
->data_blkaddr
= blkaddr
;
306 set_data_blkaddr(dn
);
307 f2fs_update_extent_cache(dn
);
310 int reserve_new_block(struct dnode_of_data
*dn
)
312 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
314 if (unlikely(is_inode_flag_set(F2FS_I(dn
->inode
), FI_NO_ALLOC
)))
316 if (unlikely(!inc_valid_block_count(sbi
, dn
->inode
, 1)))
319 trace_f2fs_reserve_new_block(dn
->inode
, dn
->nid
, dn
->ofs_in_node
);
321 dn
->data_blkaddr
= NEW_ADDR
;
322 set_data_blkaddr(dn
);
323 mark_inode_dirty(dn
->inode
);
328 int f2fs_reserve_block(struct dnode_of_data
*dn
, pgoff_t index
)
330 bool need_put
= dn
->inode_page
? false : true;
333 err
= get_dnode_of_data(dn
, index
, ALLOC_NODE
);
337 if (dn
->data_blkaddr
== NULL_ADDR
)
338 err
= reserve_new_block(dn
);
344 int f2fs_get_block(struct dnode_of_data
*dn
, pgoff_t index
)
346 struct extent_info ei
;
347 struct inode
*inode
= dn
->inode
;
349 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
350 dn
->data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
354 return f2fs_reserve_block(dn
, index
);
357 struct page
*get_read_data_page(struct inode
*inode
, pgoff_t index
,
358 int rw
, bool for_write
)
360 struct address_space
*mapping
= inode
->i_mapping
;
361 struct dnode_of_data dn
;
363 struct extent_info ei
;
365 struct f2fs_io_info fio
= {
366 .sbi
= F2FS_I_SB(inode
),
369 .encrypted_page
= NULL
,
372 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
373 return read_mapping_page(mapping
, index
, NULL
);
375 page
= f2fs_grab_cache_page(mapping
, index
, for_write
);
377 return ERR_PTR(-ENOMEM
);
379 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
380 dn
.data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
384 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
385 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
390 if (unlikely(dn
.data_blkaddr
== NULL_ADDR
)) {
395 if (PageUptodate(page
)) {
401 * A new dentry page is allocated but not able to be written, since its
402 * new inode page couldn't be allocated due to -ENOSPC.
403 * In such the case, its blkaddr can be remained as NEW_ADDR.
404 * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata.
406 if (dn
.data_blkaddr
== NEW_ADDR
) {
407 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
408 SetPageUptodate(page
);
413 fio
.new_blkaddr
= fio
.old_blkaddr
= dn
.data_blkaddr
;
415 err
= f2fs_submit_page_bio(&fio
);
421 f2fs_put_page(page
, 1);
425 struct page
*find_data_page(struct inode
*inode
, pgoff_t index
)
427 struct address_space
*mapping
= inode
->i_mapping
;
430 page
= find_get_page(mapping
, index
);
431 if (page
&& PageUptodate(page
))
433 f2fs_put_page(page
, 0);
435 page
= get_read_data_page(inode
, index
, READ_SYNC
, false);
439 if (PageUptodate(page
))
442 wait_on_page_locked(page
);
443 if (unlikely(!PageUptodate(page
))) {
444 f2fs_put_page(page
, 0);
445 return ERR_PTR(-EIO
);
451 * If it tries to access a hole, return an error.
452 * Because, the callers, functions in dir.c and GC, should be able to know
453 * whether this page exists or not.
455 struct page
*get_lock_data_page(struct inode
*inode
, pgoff_t index
,
458 struct address_space
*mapping
= inode
->i_mapping
;
461 page
= get_read_data_page(inode
, index
, READ_SYNC
, for_write
);
465 /* wait for read completion */
467 if (unlikely(!PageUptodate(page
))) {
468 f2fs_put_page(page
, 1);
469 return ERR_PTR(-EIO
);
471 if (unlikely(page
->mapping
!= mapping
)) {
472 f2fs_put_page(page
, 1);
479 * Caller ensures that this data page is never allocated.
480 * A new zero-filled data page is allocated in the page cache.
482 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
484 * Note that, ipage is set only by make_empty_dir, and if any error occur,
485 * ipage should be released by this function.
487 struct page
*get_new_data_page(struct inode
*inode
,
488 struct page
*ipage
, pgoff_t index
, bool new_i_size
)
490 struct address_space
*mapping
= inode
->i_mapping
;
492 struct dnode_of_data dn
;
495 page
= f2fs_grab_cache_page(mapping
, index
, true);
498 * before exiting, we should make sure ipage will be released
499 * if any error occur.
501 f2fs_put_page(ipage
, 1);
502 return ERR_PTR(-ENOMEM
);
505 set_new_dnode(&dn
, inode
, ipage
, NULL
, 0);
506 err
= f2fs_reserve_block(&dn
, index
);
508 f2fs_put_page(page
, 1);
514 if (PageUptodate(page
))
517 if (dn
.data_blkaddr
== NEW_ADDR
) {
518 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
519 SetPageUptodate(page
);
521 f2fs_put_page(page
, 1);
523 /* if ipage exists, blkaddr should be NEW_ADDR */
524 f2fs_bug_on(F2FS_I_SB(inode
), ipage
);
525 page
= get_lock_data_page(inode
, index
, true);
530 if (new_i_size
&& i_size_read(inode
) <
531 ((loff_t
)(index
+ 1) << PAGE_CACHE_SHIFT
)) {
532 i_size_write(inode
, ((loff_t
)(index
+ 1) << PAGE_CACHE_SHIFT
));
533 /* Only the directory inode sets new_i_size */
534 set_inode_flag(F2FS_I(inode
), FI_UPDATE_DIR
);
539 static int __allocate_data_block(struct dnode_of_data
*dn
)
541 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
542 struct f2fs_summary sum
;
544 int seg
= CURSEG_WARM_DATA
;
547 if (unlikely(is_inode_flag_set(F2FS_I(dn
->inode
), FI_NO_ALLOC
)))
550 dn
->data_blkaddr
= datablock_addr(dn
->node_page
, dn
->ofs_in_node
);
551 if (dn
->data_blkaddr
== NEW_ADDR
)
554 if (unlikely(!inc_valid_block_count(sbi
, dn
->inode
, 1)))
558 get_node_info(sbi
, dn
->nid
, &ni
);
559 set_summary(&sum
, dn
->nid
, dn
->ofs_in_node
, ni
.version
);
561 if (dn
->ofs_in_node
== 0 && dn
->inode_page
== dn
->node_page
)
562 seg
= CURSEG_DIRECT_IO
;
564 allocate_data_block(sbi
, NULL
, dn
->data_blkaddr
, &dn
->data_blkaddr
,
566 set_data_blkaddr(dn
);
569 fofs
= start_bidx_of_node(ofs_of_node(dn
->node_page
), dn
->inode
) +
571 if (i_size_read(dn
->inode
) < ((loff_t
)(fofs
+ 1) << PAGE_CACHE_SHIFT
))
572 i_size_write(dn
->inode
,
573 ((loff_t
)(fofs
+ 1) << PAGE_CACHE_SHIFT
));
577 ssize_t
f2fs_preallocate_blocks(struct kiocb
*iocb
, struct iov_iter
*from
)
579 struct inode
*inode
= file_inode(iocb
->ki_filp
);
580 struct f2fs_map_blocks map
;
583 map
.m_lblk
= F2FS_BYTES_TO_BLK(iocb
->ki_pos
);
584 map
.m_len
= F2FS_BLK_ALIGN(iov_iter_count(from
));
585 map
.m_next_pgofs
= NULL
;
587 if (f2fs_encrypted_inode(inode
))
590 if (iocb
->ki_flags
& IOCB_DIRECT
) {
591 ret
= f2fs_convert_inline_inode(inode
);
594 return f2fs_map_blocks(inode
, &map
, 1, F2FS_GET_BLOCK_PRE_DIO
);
596 if (iocb
->ki_pos
+ iov_iter_count(from
) > MAX_INLINE_DATA
) {
597 ret
= f2fs_convert_inline_inode(inode
);
601 if (!f2fs_has_inline_data(inode
))
602 return f2fs_map_blocks(inode
, &map
, 1, F2FS_GET_BLOCK_PRE_AIO
);
607 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
608 * f2fs_map_blocks structure.
609 * If original data blocks are allocated, then give them to blockdev.
611 * a. preallocate requested block addresses
612 * b. do not use extent cache for better performance
613 * c. give the block addresses to blockdev
615 int f2fs_map_blocks(struct inode
*inode
, struct f2fs_map_blocks
*map
,
616 int create
, int flag
)
618 unsigned int maxblocks
= map
->m_len
;
619 struct dnode_of_data dn
;
620 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
621 int mode
= create
? ALLOC_NODE
: LOOKUP_NODE_RA
;
622 pgoff_t pgofs
, end_offset
;
623 int err
= 0, ofs
= 1;
624 struct extent_info ei
;
625 bool allocated
= false;
631 /* it only supports block size == page size */
632 pgofs
= (pgoff_t
)map
->m_lblk
;
634 if (!create
&& f2fs_lookup_extent_cache(inode
, pgofs
, &ei
)) {
635 map
->m_pblk
= ei
.blk
+ pgofs
- ei
.fofs
;
636 map
->m_len
= min((pgoff_t
)maxblocks
, ei
.fofs
+ ei
.len
- pgofs
);
637 map
->m_flags
= F2FS_MAP_MAPPED
;
645 /* When reading holes, we need its node page */
646 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
647 err
= get_dnode_of_data(&dn
, pgofs
, mode
);
649 if (err
== -ENOENT
) {
651 if (map
->m_next_pgofs
)
653 get_next_page_offset(&dn
, pgofs
);
658 end_offset
= ADDRS_PER_PAGE(dn
.node_page
, inode
);
661 blkaddr
= datablock_addr(dn
.node_page
, dn
.ofs_in_node
);
663 if (blkaddr
== NEW_ADDR
|| blkaddr
== NULL_ADDR
) {
665 if (unlikely(f2fs_cp_error(sbi
))) {
669 if (flag
== F2FS_GET_BLOCK_PRE_AIO
) {
670 if (blkaddr
== NULL_ADDR
)
671 err
= reserve_new_block(&dn
);
673 err
= __allocate_data_block(&dn
);
678 map
->m_flags
= F2FS_MAP_NEW
;
679 blkaddr
= dn
.data_blkaddr
;
681 if (flag
== F2FS_GET_BLOCK_FIEMAP
&&
682 blkaddr
== NULL_ADDR
) {
683 if (map
->m_next_pgofs
)
684 *map
->m_next_pgofs
= pgofs
+ 1;
686 if (flag
!= F2FS_GET_BLOCK_FIEMAP
||
687 blkaddr
!= NEW_ADDR
) {
688 if (flag
== F2FS_GET_BLOCK_BMAP
)
695 if (map
->m_len
== 0) {
696 /* preallocated unwritten block should be mapped for fiemap. */
697 if (blkaddr
== NEW_ADDR
)
698 map
->m_flags
|= F2FS_MAP_UNWRITTEN
;
699 map
->m_flags
|= F2FS_MAP_MAPPED
;
701 map
->m_pblk
= blkaddr
;
703 } else if ((map
->m_pblk
!= NEW_ADDR
&&
704 blkaddr
== (map
->m_pblk
+ ofs
)) ||
705 (map
->m_pblk
== NEW_ADDR
&& blkaddr
== NEW_ADDR
) ||
706 flag
== F2FS_GET_BLOCK_PRE_DIO
||
707 flag
== F2FS_GET_BLOCK_PRE_AIO
) {
717 if (map
->m_len
< maxblocks
) {
718 if (dn
.ofs_in_node
< end_offset
)
722 sync_inode_page(&dn
);
727 f2fs_balance_fs(sbi
, allocated
);
735 sync_inode_page(&dn
);
740 f2fs_balance_fs(sbi
, allocated
);
743 trace_f2fs_map_blocks(inode
, map
, err
);
747 static int __get_data_block(struct inode
*inode
, sector_t iblock
,
748 struct buffer_head
*bh
, int create
, int flag
,
751 struct f2fs_map_blocks map
;
755 map
.m_len
= bh
->b_size
>> inode
->i_blkbits
;
756 map
.m_next_pgofs
= next_pgofs
;
758 ret
= f2fs_map_blocks(inode
, &map
, create
, flag
);
760 map_bh(bh
, inode
->i_sb
, map
.m_pblk
);
761 bh
->b_state
= (bh
->b_state
& ~F2FS_MAP_FLAGS
) | map
.m_flags
;
762 bh
->b_size
= map
.m_len
<< inode
->i_blkbits
;
767 static int get_data_block(struct inode
*inode
, sector_t iblock
,
768 struct buffer_head
*bh_result
, int create
, int flag
,
771 return __get_data_block(inode
, iblock
, bh_result
, create
,
775 static int get_data_block_dio(struct inode
*inode
, sector_t iblock
,
776 struct buffer_head
*bh_result
, int create
)
778 return __get_data_block(inode
, iblock
, bh_result
, create
,
779 F2FS_GET_BLOCK_DIO
, NULL
);
782 static int get_data_block_bmap(struct inode
*inode
, sector_t iblock
,
783 struct buffer_head
*bh_result
, int create
)
785 /* Block number less than F2FS MAX BLOCKS */
786 if (unlikely(iblock
>= F2FS_I_SB(inode
)->max_file_blocks
))
789 return __get_data_block(inode
, iblock
, bh_result
, create
,
790 F2FS_GET_BLOCK_BMAP
, NULL
);
793 static inline sector_t
logical_to_blk(struct inode
*inode
, loff_t offset
)
795 return (offset
>> inode
->i_blkbits
);
798 static inline loff_t
blk_to_logical(struct inode
*inode
, sector_t blk
)
800 return (blk
<< inode
->i_blkbits
);
803 int f2fs_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
806 struct buffer_head map_bh
;
807 sector_t start_blk
, last_blk
;
810 u64 logical
= 0, phys
= 0, size
= 0;
814 ret
= fiemap_check_flags(fieinfo
, FIEMAP_FLAG_SYNC
);
818 if (f2fs_has_inline_data(inode
)) {
819 ret
= f2fs_inline_data_fiemap(inode
, fieinfo
, start
, len
);
826 isize
= i_size_read(inode
);
830 if (start
+ len
> isize
)
833 if (logical_to_blk(inode
, len
) == 0)
834 len
= blk_to_logical(inode
, 1);
836 start_blk
= logical_to_blk(inode
, start
);
837 last_blk
= logical_to_blk(inode
, start
+ len
- 1);
840 memset(&map_bh
, 0, sizeof(struct buffer_head
));
843 ret
= get_data_block(inode
, start_blk
, &map_bh
, 0,
844 F2FS_GET_BLOCK_FIEMAP
, &next_pgofs
);
849 if (!buffer_mapped(&map_bh
)) {
850 start_blk
= next_pgofs
;
851 /* Go through holes util pass the EOF */
852 if (blk_to_logical(inode
, start_blk
) < isize
)
854 /* Found a hole beyond isize means no more extents.
855 * Note that the premise is that filesystems don't
856 * punch holes beyond isize and keep size unchanged.
858 flags
|= FIEMAP_EXTENT_LAST
;
862 if (f2fs_encrypted_inode(inode
))
863 flags
|= FIEMAP_EXTENT_DATA_ENCRYPTED
;
865 ret
= fiemap_fill_next_extent(fieinfo
, logical
,
869 if (start_blk
> last_blk
|| ret
)
872 logical
= blk_to_logical(inode
, start_blk
);
873 phys
= blk_to_logical(inode
, map_bh
.b_blocknr
);
874 size
= map_bh
.b_size
;
876 if (buffer_unwritten(&map_bh
))
877 flags
= FIEMAP_EXTENT_UNWRITTEN
;
879 start_blk
+= logical_to_blk(inode
, size
);
883 if (fatal_signal_pending(current
))
896 * This function was originally taken from fs/mpage.c, and customized for f2fs.
897 * Major change was from block_size == page_size in f2fs by default.
899 static int f2fs_mpage_readpages(struct address_space
*mapping
,
900 struct list_head
*pages
, struct page
*page
,
903 struct bio
*bio
= NULL
;
905 sector_t last_block_in_bio
= 0;
906 struct inode
*inode
= mapping
->host
;
907 const unsigned blkbits
= inode
->i_blkbits
;
908 const unsigned blocksize
= 1 << blkbits
;
909 sector_t block_in_file
;
911 sector_t last_block_in_file
;
913 struct block_device
*bdev
= inode
->i_sb
->s_bdev
;
914 struct f2fs_map_blocks map
;
920 map
.m_next_pgofs
= NULL
;
922 for (page_idx
= 0; nr_pages
; page_idx
++, nr_pages
--) {
924 prefetchw(&page
->flags
);
926 page
= list_entry(pages
->prev
, struct page
, lru
);
927 list_del(&page
->lru
);
928 if (add_to_page_cache_lru(page
, mapping
,
929 page
->index
, GFP_KERNEL
))
933 block_in_file
= (sector_t
)page
->index
;
934 last_block
= block_in_file
+ nr_pages
;
935 last_block_in_file
= (i_size_read(inode
) + blocksize
- 1) >>
937 if (last_block
> last_block_in_file
)
938 last_block
= last_block_in_file
;
941 * Map blocks using the previous result first.
943 if ((map
.m_flags
& F2FS_MAP_MAPPED
) &&
944 block_in_file
> map
.m_lblk
&&
945 block_in_file
< (map
.m_lblk
+ map
.m_len
))
949 * Then do more f2fs_map_blocks() calls until we are
950 * done with this page.
954 if (block_in_file
< last_block
) {
955 map
.m_lblk
= block_in_file
;
956 map
.m_len
= last_block
- block_in_file
;
958 if (f2fs_map_blocks(inode
, &map
, 0,
959 F2FS_GET_BLOCK_READ
))
963 if ((map
.m_flags
& F2FS_MAP_MAPPED
)) {
964 block_nr
= map
.m_pblk
+ block_in_file
- map
.m_lblk
;
965 SetPageMappedToDisk(page
);
967 if (!PageUptodate(page
) && !cleancache_get_page(page
)) {
968 SetPageUptodate(page
);
972 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
973 SetPageUptodate(page
);
979 * This page will go to BIO. Do we need to send this
982 if (bio
&& (last_block_in_bio
!= block_nr
- 1)) {
984 submit_bio(READ
, bio
);
988 struct f2fs_crypto_ctx
*ctx
= NULL
;
990 if (f2fs_encrypted_inode(inode
) &&
991 S_ISREG(inode
->i_mode
)) {
993 ctx
= f2fs_get_crypto_ctx(inode
);
997 /* wait the page to be moved by cleaning */
998 f2fs_wait_on_encrypted_page_writeback(
999 F2FS_I_SB(inode
), block_nr
);
1002 bio
= bio_alloc(GFP_KERNEL
,
1003 min_t(int, nr_pages
, BIO_MAX_PAGES
));
1006 f2fs_release_crypto_ctx(ctx
);
1007 goto set_error_page
;
1009 bio
->bi_bdev
= bdev
;
1010 bio
->bi_iter
.bi_sector
= SECTOR_FROM_BLOCK(block_nr
);
1011 bio
->bi_end_io
= f2fs_read_end_io
;
1012 bio
->bi_private
= ctx
;
1015 if (bio_add_page(bio
, page
, blocksize
, 0) < blocksize
)
1016 goto submit_and_realloc
;
1018 last_block_in_bio
= block_nr
;
1022 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
1027 submit_bio(READ
, bio
);
1033 page_cache_release(page
);
1035 BUG_ON(pages
&& !list_empty(pages
));
1037 submit_bio(READ
, bio
);
1041 static int f2fs_read_data_page(struct file
*file
, struct page
*page
)
1043 struct inode
*inode
= page
->mapping
->host
;
1046 trace_f2fs_readpage(page
, DATA
);
1048 /* If the file has inline data, try to read it directly */
1049 if (f2fs_has_inline_data(inode
))
1050 ret
= f2fs_read_inline_data(inode
, page
);
1052 ret
= f2fs_mpage_readpages(page
->mapping
, NULL
, page
, 1);
1056 static int f2fs_read_data_pages(struct file
*file
,
1057 struct address_space
*mapping
,
1058 struct list_head
*pages
, unsigned nr_pages
)
1060 struct inode
*inode
= file
->f_mapping
->host
;
1061 struct page
*page
= list_entry(pages
->prev
, struct page
, lru
);
1063 trace_f2fs_readpages(inode
, page
, nr_pages
);
1065 /* If the file has inline data, skip readpages */
1066 if (f2fs_has_inline_data(inode
))
1069 return f2fs_mpage_readpages(mapping
, pages
, NULL
, nr_pages
);
1072 int do_write_data_page(struct f2fs_io_info
*fio
)
1074 struct page
*page
= fio
->page
;
1075 struct inode
*inode
= page
->mapping
->host
;
1076 struct dnode_of_data dn
;
1079 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
1080 err
= get_dnode_of_data(&dn
, page
->index
, LOOKUP_NODE
);
1084 fio
->old_blkaddr
= dn
.data_blkaddr
;
1086 /* This page is already truncated */
1087 if (fio
->old_blkaddr
== NULL_ADDR
) {
1088 ClearPageUptodate(page
);
1092 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
)) {
1094 /* wait for GCed encrypted page writeback */
1095 f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode
),
1098 fio
->encrypted_page
= f2fs_encrypt(inode
, fio
->page
);
1099 if (IS_ERR(fio
->encrypted_page
)) {
1100 err
= PTR_ERR(fio
->encrypted_page
);
1105 set_page_writeback(page
);
1108 * If current allocation needs SSR,
1109 * it had better in-place writes for updated data.
1111 if (unlikely(fio
->old_blkaddr
!= NEW_ADDR
&&
1112 !is_cold_data(page
) &&
1113 !IS_ATOMIC_WRITTEN_PAGE(page
) &&
1114 need_inplace_update(inode
))) {
1115 rewrite_data_page(fio
);
1116 set_inode_flag(F2FS_I(inode
), FI_UPDATE_WRITE
);
1117 trace_f2fs_do_write_data_page(page
, IPU
);
1119 write_data_page(&dn
, fio
);
1120 trace_f2fs_do_write_data_page(page
, OPU
);
1121 set_inode_flag(F2FS_I(inode
), FI_APPEND_WRITE
);
1122 if (page
->index
== 0)
1123 set_inode_flag(F2FS_I(inode
), FI_FIRST_BLOCK_WRITTEN
);
1126 f2fs_put_dnode(&dn
);
1130 static int f2fs_write_data_page(struct page
*page
,
1131 struct writeback_control
*wbc
)
1133 struct inode
*inode
= page
->mapping
->host
;
1134 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1135 loff_t i_size
= i_size_read(inode
);
1136 const pgoff_t end_index
= ((unsigned long long) i_size
)
1137 >> PAGE_CACHE_SHIFT
;
1138 unsigned offset
= 0;
1139 bool need_balance_fs
= false;
1141 struct f2fs_io_info fio
= {
1144 .rw
= (wbc
->sync_mode
== WB_SYNC_ALL
) ? WRITE_SYNC
: WRITE
,
1146 .encrypted_page
= NULL
,
1149 trace_f2fs_writepage(page
, DATA
);
1151 if (page
->index
< end_index
)
1155 * If the offset is out-of-range of file size,
1156 * this page does not have to be written to disk.
1158 offset
= i_size
& (PAGE_CACHE_SIZE
- 1);
1159 if ((page
->index
>= end_index
+ 1) || !offset
)
1162 zero_user_segment(page
, offset
, PAGE_CACHE_SIZE
);
1164 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
1166 if (f2fs_is_drop_cache(inode
))
1168 if (f2fs_is_volatile_file(inode
) && !wbc
->for_reclaim
&&
1169 available_free_memory(sbi
, BASE_CHECK
))
1172 /* Dentry blocks are controlled by checkpoint */
1173 if (S_ISDIR(inode
->i_mode
)) {
1174 if (unlikely(f2fs_cp_error(sbi
)))
1176 err
= do_write_data_page(&fio
);
1180 /* we should bypass data pages to proceed the kworkder jobs */
1181 if (unlikely(f2fs_cp_error(sbi
))) {
1186 if (!wbc
->for_reclaim
)
1187 need_balance_fs
= true;
1188 else if (has_not_enough_free_secs(sbi
, 0))
1193 if (f2fs_has_inline_data(inode
))
1194 err
= f2fs_write_inline_data(inode
, page
);
1196 err
= do_write_data_page(&fio
);
1197 f2fs_unlock_op(sbi
);
1199 if (err
&& err
!= -ENOENT
)
1202 clear_cold_data(page
);
1204 inode_dec_dirty_pages(inode
);
1206 ClearPageUptodate(page
);
1208 if (wbc
->for_reclaim
) {
1209 f2fs_submit_merged_bio_cond(sbi
, NULL
, page
, 0, DATA
, WRITE
);
1210 remove_dirty_inode(inode
);
1214 f2fs_balance_fs(sbi
, need_balance_fs
);
1216 if (unlikely(f2fs_cp_error(sbi
)))
1217 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
1222 redirty_page_for_writepage(wbc
, page
);
1223 return AOP_WRITEPAGE_ACTIVATE
;
1226 static int __f2fs_writepage(struct page
*page
, struct writeback_control
*wbc
,
1229 struct address_space
*mapping
= data
;
1230 int ret
= mapping
->a_ops
->writepage(page
, wbc
);
1231 mapping_set_error(mapping
, ret
);
1236 * This function was copied from write_cche_pages from mm/page-writeback.c.
1237 * The major change is making write step of cold data page separately from
1238 * warm/hot data page.
1240 static int f2fs_write_cache_pages(struct address_space
*mapping
,
1241 struct writeback_control
*wbc
, writepage_t writepage
,
1246 struct pagevec pvec
;
1248 pgoff_t
uninitialized_var(writeback_index
);
1250 pgoff_t end
; /* Inclusive */
1253 int range_whole
= 0;
1257 pagevec_init(&pvec
, 0);
1259 if (wbc
->range_cyclic
) {
1260 writeback_index
= mapping
->writeback_index
; /* prev offset */
1261 index
= writeback_index
;
1268 index
= wbc
->range_start
>> PAGE_CACHE_SHIFT
;
1269 end
= wbc
->range_end
>> PAGE_CACHE_SHIFT
;
1270 if (wbc
->range_start
== 0 && wbc
->range_end
== LLONG_MAX
)
1272 cycled
= 1; /* ignore range_cyclic tests */
1274 if (wbc
->sync_mode
== WB_SYNC_ALL
|| wbc
->tagged_writepages
)
1275 tag
= PAGECACHE_TAG_TOWRITE
;
1277 tag
= PAGECACHE_TAG_DIRTY
;
1279 if (wbc
->sync_mode
== WB_SYNC_ALL
|| wbc
->tagged_writepages
)
1280 tag_pages_for_writeback(mapping
, index
, end
);
1282 while (!done
&& (index
<= end
)) {
1285 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &index
, tag
,
1286 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
- 1) + 1);
1290 for (i
= 0; i
< nr_pages
; i
++) {
1291 struct page
*page
= pvec
.pages
[i
];
1293 if (page
->index
> end
) {
1298 done_index
= page
->index
;
1302 if (unlikely(page
->mapping
!= mapping
)) {
1308 if (!PageDirty(page
)) {
1309 /* someone wrote it for us */
1310 goto continue_unlock
;
1313 if (step
== is_cold_data(page
))
1314 goto continue_unlock
;
1316 if (PageWriteback(page
)) {
1317 if (wbc
->sync_mode
!= WB_SYNC_NONE
)
1318 f2fs_wait_on_page_writeback(page
,
1321 goto continue_unlock
;
1324 BUG_ON(PageWriteback(page
));
1325 if (!clear_page_dirty_for_io(page
))
1326 goto continue_unlock
;
1328 ret
= (*writepage
)(page
, wbc
, data
);
1329 if (unlikely(ret
)) {
1330 if (ret
== AOP_WRITEPAGE_ACTIVATE
) {
1334 done_index
= page
->index
+ 1;
1340 if (--wbc
->nr_to_write
<= 0 &&
1341 wbc
->sync_mode
== WB_SYNC_NONE
) {
1346 pagevec_release(&pvec
);
1355 if (!cycled
&& !done
) {
1358 end
= writeback_index
- 1;
1361 if (wbc
->range_cyclic
|| (range_whole
&& wbc
->nr_to_write
> 0))
1362 mapping
->writeback_index
= done_index
;
1367 static int f2fs_write_data_pages(struct address_space
*mapping
,
1368 struct writeback_control
*wbc
)
1370 struct inode
*inode
= mapping
->host
;
1371 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1372 bool locked
= false;
1376 /* deal with chardevs and other special file */
1377 if (!mapping
->a_ops
->writepage
)
1380 /* skip writing if there is no dirty page in this inode */
1381 if (!get_dirty_pages(inode
) && wbc
->sync_mode
== WB_SYNC_NONE
)
1384 if (S_ISDIR(inode
->i_mode
) && wbc
->sync_mode
== WB_SYNC_NONE
&&
1385 get_dirty_pages(inode
) < nr_pages_to_skip(sbi
, DATA
) &&
1386 available_free_memory(sbi
, DIRTY_DENTS
))
1389 /* skip writing during file defragment */
1390 if (is_inode_flag_set(F2FS_I(inode
), FI_DO_DEFRAG
))
1393 /* during POR, we don't need to trigger writepage at all. */
1394 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
1397 trace_f2fs_writepages(mapping
->host
, wbc
, DATA
);
1399 diff
= nr_pages_to_write(sbi
, DATA
, wbc
);
1401 if (!S_ISDIR(inode
->i_mode
) && wbc
->sync_mode
== WB_SYNC_ALL
) {
1402 mutex_lock(&sbi
->writepages
);
1405 ret
= f2fs_write_cache_pages(mapping
, wbc
, __f2fs_writepage
, mapping
);
1406 f2fs_submit_merged_bio_cond(sbi
, inode
, NULL
, 0, DATA
, WRITE
);
1408 mutex_unlock(&sbi
->writepages
);
1410 remove_dirty_inode(inode
);
1412 wbc
->nr_to_write
= max((long)0, wbc
->nr_to_write
- diff
);
1416 wbc
->pages_skipped
+= get_dirty_pages(inode
);
1417 trace_f2fs_writepages(mapping
->host
, wbc
, DATA
);
1421 static void f2fs_write_failed(struct address_space
*mapping
, loff_t to
)
1423 struct inode
*inode
= mapping
->host
;
1424 loff_t i_size
= i_size_read(inode
);
1427 truncate_pagecache(inode
, i_size
);
1428 truncate_blocks(inode
, i_size
, true);
1432 static int prepare_write_begin(struct f2fs_sb_info
*sbi
,
1433 struct page
*page
, loff_t pos
, unsigned len
,
1434 block_t
*blk_addr
, bool *node_changed
)
1436 struct inode
*inode
= page
->mapping
->host
;
1437 pgoff_t index
= page
->index
;
1438 struct dnode_of_data dn
;
1440 bool locked
= false;
1441 struct extent_info ei
;
1445 * we already allocated all the blocks, so we don't need to get
1446 * the block addresses when there is no need to fill the page.
1448 if (!f2fs_has_inline_data(inode
) && !f2fs_encrypted_inode(inode
) &&
1449 len
== PAGE_CACHE_SIZE
)
1452 if (f2fs_has_inline_data(inode
) ||
1453 (pos
& PAGE_CACHE_MASK
) >= i_size_read(inode
)) {
1458 /* check inline_data */
1459 ipage
= get_node_page(sbi
, inode
->i_ino
);
1460 if (IS_ERR(ipage
)) {
1461 err
= PTR_ERR(ipage
);
1465 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
1467 if (f2fs_has_inline_data(inode
)) {
1468 if (pos
+ len
<= MAX_INLINE_DATA
) {
1469 read_inline_data(page
, ipage
);
1470 set_inode_flag(F2FS_I(inode
), FI_DATA_EXIST
);
1471 set_inline_node(ipage
);
1473 err
= f2fs_convert_inline_page(&dn
, page
);
1476 if (dn
.data_blkaddr
== NULL_ADDR
)
1477 err
= f2fs_get_block(&dn
, index
);
1479 } else if (locked
) {
1480 err
= f2fs_get_block(&dn
, index
);
1482 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
1483 dn
.data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
1486 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
1487 if (err
|| (!err
&& dn
.data_blkaddr
== NULL_ADDR
)) {
1488 f2fs_put_dnode(&dn
);
1496 /* convert_inline_page can make node_changed */
1497 *blk_addr
= dn
.data_blkaddr
;
1498 *node_changed
= dn
.node_changed
;
1500 f2fs_put_dnode(&dn
);
1503 f2fs_unlock_op(sbi
);
1507 static int f2fs_write_begin(struct file
*file
, struct address_space
*mapping
,
1508 loff_t pos
, unsigned len
, unsigned flags
,
1509 struct page
**pagep
, void **fsdata
)
1511 struct inode
*inode
= mapping
->host
;
1512 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1513 struct page
*page
= NULL
;
1514 pgoff_t index
= ((unsigned long long) pos
) >> PAGE_CACHE_SHIFT
;
1515 bool need_balance
= false;
1516 block_t blkaddr
= NULL_ADDR
;
1519 trace_f2fs_write_begin(inode
, pos
, len
, flags
);
1522 * We should check this at this moment to avoid deadlock on inode page
1523 * and #0 page. The locking rule for inline_data conversion should be:
1524 * lock_page(page #0) -> lock_page(inode_page)
1527 err
= f2fs_convert_inline_inode(inode
);
1532 page
= grab_cache_page_write_begin(mapping
, index
, flags
);
1540 err
= prepare_write_begin(sbi
, page
, pos
, len
,
1541 &blkaddr
, &need_balance
);
1545 if (need_balance
&& has_not_enough_free_secs(sbi
, 0)) {
1547 f2fs_balance_fs(sbi
, true);
1549 if (page
->mapping
!= mapping
) {
1550 /* The page got truncated from under us */
1551 f2fs_put_page(page
, 1);
1556 f2fs_wait_on_page_writeback(page
, DATA
, false);
1558 /* wait for GCed encrypted page writeback */
1559 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
1560 f2fs_wait_on_encrypted_page_writeback(sbi
, blkaddr
);
1562 if (len
== PAGE_CACHE_SIZE
)
1564 if (PageUptodate(page
))
1567 if ((pos
& PAGE_CACHE_MASK
) >= i_size_read(inode
)) {
1568 unsigned start
= pos
& (PAGE_CACHE_SIZE
- 1);
1569 unsigned end
= start
+ len
;
1571 /* Reading beyond i_size is simple: memset to zero */
1572 zero_user_segments(page
, 0, start
, end
, PAGE_CACHE_SIZE
);
1576 if (blkaddr
== NEW_ADDR
) {
1577 zero_user_segment(page
, 0, PAGE_CACHE_SIZE
);
1579 struct f2fs_io_info fio
= {
1583 .old_blkaddr
= blkaddr
,
1584 .new_blkaddr
= blkaddr
,
1586 .encrypted_page
= NULL
,
1588 err
= f2fs_submit_page_bio(&fio
);
1593 if (unlikely(!PageUptodate(page
))) {
1597 if (unlikely(page
->mapping
!= mapping
)) {
1598 f2fs_put_page(page
, 1);
1602 /* avoid symlink page */
1603 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
)) {
1604 err
= f2fs_decrypt(page
);
1610 SetPageUptodate(page
);
1612 clear_cold_data(page
);
1616 f2fs_put_page(page
, 1);
1617 f2fs_write_failed(mapping
, pos
+ len
);
1621 static int f2fs_write_end(struct file
*file
,
1622 struct address_space
*mapping
,
1623 loff_t pos
, unsigned len
, unsigned copied
,
1624 struct page
*page
, void *fsdata
)
1626 struct inode
*inode
= page
->mapping
->host
;
1628 trace_f2fs_write_end(inode
, pos
, len
, copied
);
1630 set_page_dirty(page
);
1632 if (pos
+ copied
> i_size_read(inode
)) {
1633 i_size_write(inode
, pos
+ copied
);
1634 mark_inode_dirty(inode
);
1637 f2fs_put_page(page
, 1);
1638 f2fs_update_time(F2FS_I_SB(inode
), REQ_TIME
);
1642 static int check_direct_IO(struct inode
*inode
, struct iov_iter
*iter
,
1645 unsigned blocksize_mask
= inode
->i_sb
->s_blocksize
- 1;
1647 if (offset
& blocksize_mask
)
1650 if (iov_iter_alignment(iter
) & blocksize_mask
)
1656 static ssize_t
f2fs_direct_IO(struct kiocb
*iocb
, struct iov_iter
*iter
,
1659 struct address_space
*mapping
= iocb
->ki_filp
->f_mapping
;
1660 struct inode
*inode
= mapping
->host
;
1661 size_t count
= iov_iter_count(iter
);
1664 err
= check_direct_IO(inode
, iter
, offset
);
1668 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
1671 trace_f2fs_direct_IO_enter(inode
, offset
, count
, iov_iter_rw(iter
));
1673 err
= blockdev_direct_IO(iocb
, inode
, iter
, offset
, get_data_block_dio
);
1674 if (err
< 0 && iov_iter_rw(iter
) == WRITE
)
1675 f2fs_write_failed(mapping
, offset
+ count
);
1677 trace_f2fs_direct_IO_exit(inode
, offset
, count
, iov_iter_rw(iter
), err
);
1682 void f2fs_invalidate_page(struct page
*page
, unsigned int offset
,
1683 unsigned int length
)
1685 struct inode
*inode
= page
->mapping
->host
;
1686 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1688 if (inode
->i_ino
>= F2FS_ROOT_INO(sbi
) &&
1689 (offset
% PAGE_CACHE_SIZE
|| length
!= PAGE_CACHE_SIZE
))
1692 if (PageDirty(page
)) {
1693 if (inode
->i_ino
== F2FS_META_INO(sbi
))
1694 dec_page_count(sbi
, F2FS_DIRTY_META
);
1695 else if (inode
->i_ino
== F2FS_NODE_INO(sbi
))
1696 dec_page_count(sbi
, F2FS_DIRTY_NODES
);
1698 inode_dec_dirty_pages(inode
);
1701 /* This is atomic written page, keep Private */
1702 if (IS_ATOMIC_WRITTEN_PAGE(page
))
1705 ClearPagePrivate(page
);
1708 int f2fs_release_page(struct page
*page
, gfp_t wait
)
1710 /* If this is dirty page, keep PagePrivate */
1711 if (PageDirty(page
))
1714 /* This is atomic written page, keep Private */
1715 if (IS_ATOMIC_WRITTEN_PAGE(page
))
1718 ClearPagePrivate(page
);
1722 static int f2fs_set_data_page_dirty(struct page
*page
)
1724 struct address_space
*mapping
= page
->mapping
;
1725 struct inode
*inode
= mapping
->host
;
1727 trace_f2fs_set_page_dirty(page
, DATA
);
1729 SetPageUptodate(page
);
1731 if (f2fs_is_atomic_file(inode
)) {
1732 if (!IS_ATOMIC_WRITTEN_PAGE(page
)) {
1733 register_inmem_page(inode
, page
);
1737 * Previously, this page has been registered, we just
1743 if (!PageDirty(page
)) {
1744 __set_page_dirty_nobuffers(page
);
1745 update_dirty_page(inode
, page
);
1751 static sector_t
f2fs_bmap(struct address_space
*mapping
, sector_t block
)
1753 struct inode
*inode
= mapping
->host
;
1755 if (f2fs_has_inline_data(inode
))
1758 /* make sure allocating whole blocks */
1759 if (mapping_tagged(mapping
, PAGECACHE_TAG_DIRTY
))
1760 filemap_write_and_wait(mapping
);
1762 return generic_block_bmap(mapping
, block
, get_data_block_bmap
);
1765 const struct address_space_operations f2fs_dblock_aops
= {
1766 .readpage
= f2fs_read_data_page
,
1767 .readpages
= f2fs_read_data_pages
,
1768 .writepage
= f2fs_write_data_page
,
1769 .writepages
= f2fs_write_data_pages
,
1770 .write_begin
= f2fs_write_begin
,
1771 .write_end
= f2fs_write_end
,
1772 .set_page_dirty
= f2fs_set_data_page_dirty
,
1773 .invalidatepage
= f2fs_invalidate_page
,
1774 .releasepage
= f2fs_release_page
,
1775 .direct_IO
= f2fs_direct_IO
,