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>
23 #include <linux/memcontrol.h>
24 #include <linux/cleancache.h>
30 #include <trace/events/f2fs.h>
32 static bool __is_cp_guaranteed(struct page
*page
)
34 struct address_space
*mapping
= page
->mapping
;
36 struct f2fs_sb_info
*sbi
;
41 inode
= mapping
->host
;
42 sbi
= F2FS_I_SB(inode
);
44 if (inode
->i_ino
== F2FS_META_INO(sbi
) ||
45 inode
->i_ino
== F2FS_NODE_INO(sbi
) ||
46 S_ISDIR(inode
->i_mode
) ||
52 static void f2fs_read_end_io(struct bio
*bio
)
57 #ifdef CONFIG_F2FS_FAULT_INJECTION
58 if (time_to_inject(F2FS_P_SB(bio
->bi_io_vec
->bv_page
), FAULT_IO
))
62 if (f2fs_bio_encrypted(bio
)) {
64 fscrypt_release_ctx(bio
->bi_private
);
66 fscrypt_decrypt_bio_pages(bio
->bi_private
, bio
);
71 bio_for_each_segment_all(bvec
, bio
, i
) {
72 struct page
*page
= bvec
->bv_page
;
75 if (!PageUptodate(page
))
76 SetPageUptodate(page
);
78 ClearPageUptodate(page
);
86 static void f2fs_write_end_io(struct bio
*bio
)
88 struct f2fs_sb_info
*sbi
= bio
->bi_private
;
92 bio_for_each_segment_all(bvec
, bio
, i
) {
93 struct page
*page
= bvec
->bv_page
;
94 enum count_type type
= WB_DATA_TYPE(page
);
96 if (IS_DUMMY_WRITTEN_PAGE(page
)) {
97 set_page_private(page
, (unsigned long)NULL
);
98 ClearPagePrivate(page
);
100 mempool_free(page
, sbi
->write_io_dummy
);
102 if (unlikely(bio
->bi_error
))
103 f2fs_stop_checkpoint(sbi
, true);
107 fscrypt_pullback_bio_page(&page
, true);
109 if (unlikely(bio
->bi_error
)) {
110 mapping_set_error(page
->mapping
, -EIO
);
111 f2fs_stop_checkpoint(sbi
, true);
113 dec_page_count(sbi
, type
);
114 clear_cold_data(page
);
115 end_page_writeback(page
);
117 if (!get_pages(sbi
, F2FS_WB_CP_DATA
) &&
118 wq_has_sleeper(&sbi
->cp_wait
))
119 wake_up(&sbi
->cp_wait
);
125 * Return true, if pre_bio's bdev is same as its target device.
127 struct block_device
*f2fs_target_device(struct f2fs_sb_info
*sbi
,
128 block_t blk_addr
, struct bio
*bio
)
130 struct block_device
*bdev
= sbi
->sb
->s_bdev
;
133 for (i
= 0; i
< sbi
->s_ndevs
; i
++) {
134 if (FDEV(i
).start_blk
<= blk_addr
&&
135 FDEV(i
).end_blk
>= blk_addr
) {
136 blk_addr
-= FDEV(i
).start_blk
;
143 bio
->bi_iter
.bi_sector
= SECTOR_FROM_BLOCK(blk_addr
);
148 int f2fs_target_device_index(struct f2fs_sb_info
*sbi
, block_t blkaddr
)
152 for (i
= 0; i
< sbi
->s_ndevs
; i
++)
153 if (FDEV(i
).start_blk
<= blkaddr
&& FDEV(i
).end_blk
>= blkaddr
)
158 static bool __same_bdev(struct f2fs_sb_info
*sbi
,
159 block_t blk_addr
, struct bio
*bio
)
161 return f2fs_target_device(sbi
, blk_addr
, NULL
) == bio
->bi_bdev
;
165 * Low-level block read/write IO operations.
167 static struct bio
*__bio_alloc(struct f2fs_sb_info
*sbi
, block_t blk_addr
,
168 int npages
, bool is_read
)
172 bio
= f2fs_bio_alloc(npages
);
174 f2fs_target_device(sbi
, blk_addr
, bio
);
175 bio
->bi_end_io
= is_read
? f2fs_read_end_io
: f2fs_write_end_io
;
176 bio
->bi_private
= is_read
? NULL
: sbi
;
181 static inline void __submit_bio(struct f2fs_sb_info
*sbi
,
182 struct bio
*bio
, enum page_type type
)
184 if (!is_read_io(bio_op(bio
))) {
187 if (f2fs_sb_mounted_blkzoned(sbi
->sb
) &&
188 current
->plug
&& (type
== DATA
|| type
== NODE
))
189 blk_finish_plug(current
->plug
);
191 if (type
!= DATA
&& type
!= NODE
)
194 start
= bio
->bi_iter
.bi_size
>> F2FS_BLKSIZE_BITS
;
195 start
%= F2FS_IO_SIZE(sbi
);
200 /* fill dummy pages */
201 for (; start
< F2FS_IO_SIZE(sbi
); start
++) {
203 mempool_alloc(sbi
->write_io_dummy
,
204 GFP_NOIO
| __GFP_ZERO
| __GFP_NOFAIL
);
205 f2fs_bug_on(sbi
, !page
);
207 SetPagePrivate(page
);
208 set_page_private(page
, (unsigned long)DUMMY_WRITTEN_PAGE
);
210 if (bio_add_page(bio
, page
, PAGE_SIZE
, 0) < PAGE_SIZE
)
214 * In the NODE case, we lose next block address chain. So, we
215 * need to do checkpoint in f2fs_sync_file.
218 set_sbi_flag(sbi
, SBI_NEED_CP
);
221 if (is_read_io(bio_op(bio
)))
222 trace_f2fs_submit_read_bio(sbi
->sb
, type
, bio
);
224 trace_f2fs_submit_write_bio(sbi
->sb
, type
, bio
);
228 static void __submit_merged_bio(struct f2fs_bio_info
*io
)
230 struct f2fs_io_info
*fio
= &io
->fio
;
235 bio_set_op_attrs(io
->bio
, fio
->op
, fio
->op_flags
);
237 if (is_read_io(fio
->op
))
238 trace_f2fs_prepare_read_bio(io
->sbi
->sb
, fio
->type
, io
->bio
);
240 trace_f2fs_prepare_write_bio(io
->sbi
->sb
, fio
->type
, io
->bio
);
242 __submit_bio(io
->sbi
, io
->bio
, fio
->type
);
246 static bool __has_merged_page(struct f2fs_bio_info
*io
,
247 struct inode
*inode
, nid_t ino
, pgoff_t idx
)
249 struct bio_vec
*bvec
;
259 bio_for_each_segment_all(bvec
, io
->bio
, i
) {
261 if (bvec
->bv_page
->mapping
)
262 target
= bvec
->bv_page
;
264 target
= fscrypt_control_page(bvec
->bv_page
);
266 if (idx
!= target
->index
)
269 if (inode
&& inode
== target
->mapping
->host
)
271 if (ino
&& ino
== ino_of_node(target
))
278 static bool has_merged_page(struct f2fs_sb_info
*sbi
, struct inode
*inode
,
279 nid_t ino
, pgoff_t idx
, enum page_type type
)
281 enum page_type btype
= PAGE_TYPE_OF_BIO(type
);
282 struct f2fs_bio_info
*io
= &sbi
->write_io
[btype
];
285 down_read(&io
->io_rwsem
);
286 ret
= __has_merged_page(io
, inode
, ino
, idx
);
287 up_read(&io
->io_rwsem
);
291 static void __f2fs_submit_merged_bio(struct f2fs_sb_info
*sbi
,
292 struct inode
*inode
, nid_t ino
, pgoff_t idx
,
293 enum page_type type
, int rw
)
295 enum page_type btype
= PAGE_TYPE_OF_BIO(type
);
296 struct f2fs_bio_info
*io
;
298 io
= is_read_io(rw
) ? &sbi
->read_io
: &sbi
->write_io
[btype
];
300 down_write(&io
->io_rwsem
);
302 if (!__has_merged_page(io
, inode
, ino
, idx
))
305 /* change META to META_FLUSH in the checkpoint procedure */
306 if (type
>= META_FLUSH
) {
307 io
->fio
.type
= META_FLUSH
;
308 io
->fio
.op
= REQ_OP_WRITE
;
309 io
->fio
.op_flags
= REQ_META
| REQ_PRIO
;
310 if (!test_opt(sbi
, NOBARRIER
))
311 io
->fio
.op_flags
|= REQ_PREFLUSH
| REQ_FUA
;
313 __submit_merged_bio(io
);
315 up_write(&io
->io_rwsem
);
318 void f2fs_submit_merged_bio(struct f2fs_sb_info
*sbi
, enum page_type type
,
321 __f2fs_submit_merged_bio(sbi
, NULL
, 0, 0, type
, rw
);
324 void f2fs_submit_merged_bio_cond(struct f2fs_sb_info
*sbi
,
325 struct inode
*inode
, nid_t ino
, pgoff_t idx
,
326 enum page_type type
, int rw
)
328 if (has_merged_page(sbi
, inode
, ino
, idx
, type
))
329 __f2fs_submit_merged_bio(sbi
, inode
, ino
, idx
, type
, rw
);
332 void f2fs_flush_merged_bios(struct f2fs_sb_info
*sbi
)
334 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
335 f2fs_submit_merged_bio(sbi
, NODE
, WRITE
);
336 f2fs_submit_merged_bio(sbi
, META
, WRITE
);
340 * Fill the locked page with data located in the block address.
341 * Return unlocked page.
343 int f2fs_submit_page_bio(struct f2fs_io_info
*fio
)
346 struct page
*page
= fio
->encrypted_page
?
347 fio
->encrypted_page
: fio
->page
;
349 trace_f2fs_submit_page_bio(page
, fio
);
350 f2fs_trace_ios(fio
, 0);
352 /* Allocate a new bio */
353 bio
= __bio_alloc(fio
->sbi
, fio
->new_blkaddr
, 1, is_read_io(fio
->op
));
355 if (bio_add_page(bio
, page
, PAGE_SIZE
, 0) < PAGE_SIZE
) {
359 bio_set_op_attrs(bio
, fio
->op
, fio
->op_flags
);
361 __submit_bio(fio
->sbi
, bio
, fio
->type
);
365 int f2fs_submit_page_mbio(struct f2fs_io_info
*fio
)
367 struct f2fs_sb_info
*sbi
= fio
->sbi
;
368 enum page_type btype
= PAGE_TYPE_OF_BIO(fio
->type
);
369 struct f2fs_bio_info
*io
;
370 bool is_read
= is_read_io(fio
->op
);
371 struct page
*bio_page
;
374 io
= is_read
? &sbi
->read_io
: &sbi
->write_io
[btype
];
376 if (fio
->old_blkaddr
!= NEW_ADDR
)
377 verify_block_addr(sbi
, fio
->old_blkaddr
);
378 verify_block_addr(sbi
, fio
->new_blkaddr
);
380 bio_page
= fio
->encrypted_page
? fio
->encrypted_page
: fio
->page
;
382 /* set submitted = 1 as a return value */
386 inc_page_count(sbi
, WB_DATA_TYPE(bio_page
));
388 down_write(&io
->io_rwsem
);
390 if (io
->bio
&& (io
->last_block_in_bio
!= fio
->new_blkaddr
- 1 ||
391 (io
->fio
.op
!= fio
->op
|| io
->fio
.op_flags
!= fio
->op_flags
) ||
392 !__same_bdev(sbi
, fio
->new_blkaddr
, io
->bio
)))
393 __submit_merged_bio(io
);
395 if (io
->bio
== NULL
) {
396 if ((fio
->type
== DATA
|| fio
->type
== NODE
) &&
397 fio
->new_blkaddr
& F2FS_IO_SIZE_MASK(sbi
)) {
399 dec_page_count(sbi
, WB_DATA_TYPE(bio_page
));
402 io
->bio
= __bio_alloc(sbi
, fio
->new_blkaddr
,
403 BIO_MAX_PAGES
, is_read
);
407 if (bio_add_page(io
->bio
, bio_page
, PAGE_SIZE
, 0) <
409 __submit_merged_bio(io
);
413 io
->last_block_in_bio
= fio
->new_blkaddr
;
414 f2fs_trace_ios(fio
, 0);
416 up_write(&io
->io_rwsem
);
417 trace_f2fs_submit_page_mbio(fio
->page
, fio
);
421 static void __set_data_blkaddr(struct dnode_of_data
*dn
)
423 struct f2fs_node
*rn
= F2FS_NODE(dn
->node_page
);
426 /* Get physical address of data block */
427 addr_array
= blkaddr_in_node(rn
);
428 addr_array
[dn
->ofs_in_node
] = cpu_to_le32(dn
->data_blkaddr
);
432 * Lock ordering for the change of data block address:
435 * update block addresses in the node page
437 void set_data_blkaddr(struct dnode_of_data
*dn
)
439 f2fs_wait_on_page_writeback(dn
->node_page
, NODE
, true);
440 __set_data_blkaddr(dn
);
441 if (set_page_dirty(dn
->node_page
))
442 dn
->node_changed
= true;
445 void f2fs_update_data_blkaddr(struct dnode_of_data
*dn
, block_t blkaddr
)
447 dn
->data_blkaddr
= blkaddr
;
448 set_data_blkaddr(dn
);
449 f2fs_update_extent_cache(dn
);
452 /* dn->ofs_in_node will be returned with up-to-date last block pointer */
453 int reserve_new_blocks(struct dnode_of_data
*dn
, blkcnt_t count
)
455 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
460 if (unlikely(is_inode_flag_set(dn
->inode
, FI_NO_ALLOC
)))
462 if (unlikely(!inc_valid_block_count(sbi
, dn
->inode
, &count
)))
465 trace_f2fs_reserve_new_blocks(dn
->inode
, dn
->nid
,
466 dn
->ofs_in_node
, count
);
468 f2fs_wait_on_page_writeback(dn
->node_page
, NODE
, true);
470 for (; count
> 0; dn
->ofs_in_node
++) {
472 datablock_addr(dn
->node_page
, dn
->ofs_in_node
);
473 if (blkaddr
== NULL_ADDR
) {
474 dn
->data_blkaddr
= NEW_ADDR
;
475 __set_data_blkaddr(dn
);
480 if (set_page_dirty(dn
->node_page
))
481 dn
->node_changed
= true;
485 /* Should keep dn->ofs_in_node unchanged */
486 int reserve_new_block(struct dnode_of_data
*dn
)
488 unsigned int ofs_in_node
= dn
->ofs_in_node
;
491 ret
= reserve_new_blocks(dn
, 1);
492 dn
->ofs_in_node
= ofs_in_node
;
496 int f2fs_reserve_block(struct dnode_of_data
*dn
, pgoff_t index
)
498 bool need_put
= dn
->inode_page
? false : true;
501 err
= get_dnode_of_data(dn
, index
, ALLOC_NODE
);
505 if (dn
->data_blkaddr
== NULL_ADDR
)
506 err
= reserve_new_block(dn
);
512 int f2fs_get_block(struct dnode_of_data
*dn
, pgoff_t index
)
514 struct extent_info ei
= {0,0,0};
515 struct inode
*inode
= dn
->inode
;
517 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
518 dn
->data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
522 return f2fs_reserve_block(dn
, index
);
525 struct page
*get_read_data_page(struct inode
*inode
, pgoff_t index
,
526 int op_flags
, bool for_write
)
528 struct address_space
*mapping
= inode
->i_mapping
;
529 struct dnode_of_data dn
;
531 struct extent_info ei
= {0,0,0};
533 struct f2fs_io_info fio
= {
534 .sbi
= F2FS_I_SB(inode
),
537 .op_flags
= op_flags
,
538 .encrypted_page
= NULL
,
541 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
542 return read_mapping_page(mapping
, index
, NULL
);
544 page
= f2fs_grab_cache_page(mapping
, index
, for_write
);
546 return ERR_PTR(-ENOMEM
);
548 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
549 dn
.data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
553 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
554 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
559 if (unlikely(dn
.data_blkaddr
== NULL_ADDR
)) {
564 if (PageUptodate(page
)) {
570 * A new dentry page is allocated but not able to be written, since its
571 * new inode page couldn't be allocated due to -ENOSPC.
572 * In such the case, its blkaddr can be remained as NEW_ADDR.
573 * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata.
575 if (dn
.data_blkaddr
== NEW_ADDR
) {
576 zero_user_segment(page
, 0, PAGE_SIZE
);
577 if (!PageUptodate(page
))
578 SetPageUptodate(page
);
583 fio
.new_blkaddr
= fio
.old_blkaddr
= dn
.data_blkaddr
;
585 err
= f2fs_submit_page_bio(&fio
);
591 f2fs_put_page(page
, 1);
595 struct page
*find_data_page(struct inode
*inode
, pgoff_t index
)
597 struct address_space
*mapping
= inode
->i_mapping
;
600 page
= find_get_page(mapping
, index
);
601 if (page
&& PageUptodate(page
))
603 f2fs_put_page(page
, 0);
605 page
= get_read_data_page(inode
, index
, 0, false);
609 if (PageUptodate(page
))
612 wait_on_page_locked(page
);
613 if (unlikely(!PageUptodate(page
))) {
614 f2fs_put_page(page
, 0);
615 return ERR_PTR(-EIO
);
621 * If it tries to access a hole, return an error.
622 * Because, the callers, functions in dir.c and GC, should be able to know
623 * whether this page exists or not.
625 struct page
*get_lock_data_page(struct inode
*inode
, pgoff_t index
,
628 struct address_space
*mapping
= inode
->i_mapping
;
631 page
= get_read_data_page(inode
, index
, 0, for_write
);
635 /* wait for read completion */
637 if (unlikely(page
->mapping
!= mapping
)) {
638 f2fs_put_page(page
, 1);
641 if (unlikely(!PageUptodate(page
))) {
642 f2fs_put_page(page
, 1);
643 return ERR_PTR(-EIO
);
649 * Caller ensures that this data page is never allocated.
650 * A new zero-filled data page is allocated in the page cache.
652 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
654 * Note that, ipage is set only by make_empty_dir, and if any error occur,
655 * ipage should be released by this function.
657 struct page
*get_new_data_page(struct inode
*inode
,
658 struct page
*ipage
, pgoff_t index
, bool new_i_size
)
660 struct address_space
*mapping
= inode
->i_mapping
;
662 struct dnode_of_data dn
;
665 page
= f2fs_grab_cache_page(mapping
, index
, true);
668 * before exiting, we should make sure ipage will be released
669 * if any error occur.
671 f2fs_put_page(ipage
, 1);
672 return ERR_PTR(-ENOMEM
);
675 set_new_dnode(&dn
, inode
, ipage
, NULL
, 0);
676 err
= f2fs_reserve_block(&dn
, index
);
678 f2fs_put_page(page
, 1);
684 if (PageUptodate(page
))
687 if (dn
.data_blkaddr
== NEW_ADDR
) {
688 zero_user_segment(page
, 0, PAGE_SIZE
);
689 if (!PageUptodate(page
))
690 SetPageUptodate(page
);
692 f2fs_put_page(page
, 1);
694 /* if ipage exists, blkaddr should be NEW_ADDR */
695 f2fs_bug_on(F2FS_I_SB(inode
), ipage
);
696 page
= get_lock_data_page(inode
, index
, true);
701 if (new_i_size
&& i_size_read(inode
) <
702 ((loff_t
)(index
+ 1) << PAGE_SHIFT
))
703 f2fs_i_size_write(inode
, ((loff_t
)(index
+ 1) << PAGE_SHIFT
));
707 static int __allocate_data_block(struct dnode_of_data
*dn
)
709 struct f2fs_sb_info
*sbi
= F2FS_I_SB(dn
->inode
);
710 struct f2fs_summary sum
;
715 if (unlikely(is_inode_flag_set(dn
->inode
, FI_NO_ALLOC
)))
718 dn
->data_blkaddr
= datablock_addr(dn
->node_page
, dn
->ofs_in_node
);
719 if (dn
->data_blkaddr
== NEW_ADDR
)
722 if (unlikely(!inc_valid_block_count(sbi
, dn
->inode
, &count
)))
726 get_node_info(sbi
, dn
->nid
, &ni
);
727 set_summary(&sum
, dn
->nid
, dn
->ofs_in_node
, ni
.version
);
729 allocate_data_block(sbi
, NULL
, dn
->data_blkaddr
, &dn
->data_blkaddr
,
730 &sum
, CURSEG_WARM_DATA
);
731 set_data_blkaddr(dn
);
734 fofs
= start_bidx_of_node(ofs_of_node(dn
->node_page
), dn
->inode
) +
736 if (i_size_read(dn
->inode
) < ((loff_t
)(fofs
+ 1) << PAGE_SHIFT
))
737 f2fs_i_size_write(dn
->inode
,
738 ((loff_t
)(fofs
+ 1) << PAGE_SHIFT
));
742 static inline bool __force_buffered_io(struct inode
*inode
, int rw
)
744 return ((f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
)) ||
745 (rw
== WRITE
&& test_opt(F2FS_I_SB(inode
), LFS
)) ||
746 F2FS_I_SB(inode
)->s_ndevs
);
749 int f2fs_preallocate_blocks(struct kiocb
*iocb
, struct iov_iter
*from
)
751 struct inode
*inode
= file_inode(iocb
->ki_filp
);
752 struct f2fs_map_blocks map
;
755 if (is_inode_flag_set(inode
, FI_NO_PREALLOC
))
758 map
.m_lblk
= F2FS_BLK_ALIGN(iocb
->ki_pos
);
759 map
.m_len
= F2FS_BYTES_TO_BLK(iocb
->ki_pos
+ iov_iter_count(from
));
760 if (map
.m_len
> map
.m_lblk
)
761 map
.m_len
-= map
.m_lblk
;
765 map
.m_next_pgofs
= NULL
;
767 if (iocb
->ki_flags
& IOCB_DIRECT
) {
768 err
= f2fs_convert_inline_inode(inode
);
771 return f2fs_map_blocks(inode
, &map
, 1,
772 __force_buffered_io(inode
, WRITE
) ?
773 F2FS_GET_BLOCK_PRE_AIO
:
774 F2FS_GET_BLOCK_PRE_DIO
);
776 if (iocb
->ki_pos
+ iov_iter_count(from
) > MAX_INLINE_DATA
) {
777 err
= f2fs_convert_inline_inode(inode
);
781 if (!f2fs_has_inline_data(inode
))
782 return f2fs_map_blocks(inode
, &map
, 1, F2FS_GET_BLOCK_PRE_AIO
);
787 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
788 * f2fs_map_blocks structure.
789 * If original data blocks are allocated, then give them to blockdev.
791 * a. preallocate requested block addresses
792 * b. do not use extent cache for better performance
793 * c. give the block addresses to blockdev
795 int f2fs_map_blocks(struct inode
*inode
, struct f2fs_map_blocks
*map
,
796 int create
, int flag
)
798 unsigned int maxblocks
= map
->m_len
;
799 struct dnode_of_data dn
;
800 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
801 int mode
= create
? ALLOC_NODE
: LOOKUP_NODE
;
802 pgoff_t pgofs
, end_offset
, end
;
803 int err
= 0, ofs
= 1;
804 unsigned int ofs_in_node
, last_ofs_in_node
;
806 struct extent_info ei
= {0,0,0};
815 /* it only supports block size == page size */
816 pgofs
= (pgoff_t
)map
->m_lblk
;
817 end
= pgofs
+ maxblocks
;
819 if (!create
&& f2fs_lookup_extent_cache(inode
, pgofs
, &ei
)) {
820 map
->m_pblk
= ei
.blk
+ pgofs
- ei
.fofs
;
821 map
->m_len
= min((pgoff_t
)maxblocks
, ei
.fofs
+ ei
.len
- pgofs
);
822 map
->m_flags
= F2FS_MAP_MAPPED
;
830 /* When reading holes, we need its node page */
831 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
832 err
= get_dnode_of_data(&dn
, pgofs
, mode
);
834 if (flag
== F2FS_GET_BLOCK_BMAP
)
836 if (err
== -ENOENT
) {
838 if (map
->m_next_pgofs
)
840 get_next_page_offset(&dn
, pgofs
);
846 last_ofs_in_node
= ofs_in_node
= dn
.ofs_in_node
;
847 end_offset
= ADDRS_PER_PAGE(dn
.node_page
, inode
);
850 blkaddr
= datablock_addr(dn
.node_page
, dn
.ofs_in_node
);
852 if (blkaddr
== NEW_ADDR
|| blkaddr
== NULL_ADDR
) {
854 if (unlikely(f2fs_cp_error(sbi
))) {
858 if (flag
== F2FS_GET_BLOCK_PRE_AIO
) {
859 if (blkaddr
== NULL_ADDR
) {
861 last_ofs_in_node
= dn
.ofs_in_node
;
864 err
= __allocate_data_block(&dn
);
866 set_inode_flag(inode
, FI_APPEND_WRITE
);
870 map
->m_flags
|= F2FS_MAP_NEW
;
871 blkaddr
= dn
.data_blkaddr
;
873 if (flag
== F2FS_GET_BLOCK_BMAP
) {
877 if (flag
== F2FS_GET_BLOCK_FIEMAP
&&
878 blkaddr
== NULL_ADDR
) {
879 if (map
->m_next_pgofs
)
880 *map
->m_next_pgofs
= pgofs
+ 1;
882 if (flag
!= F2FS_GET_BLOCK_FIEMAP
||
888 if (flag
== F2FS_GET_BLOCK_PRE_AIO
)
891 if (map
->m_len
== 0) {
892 /* preallocated unwritten block should be mapped for fiemap. */
893 if (blkaddr
== NEW_ADDR
)
894 map
->m_flags
|= F2FS_MAP_UNWRITTEN
;
895 map
->m_flags
|= F2FS_MAP_MAPPED
;
897 map
->m_pblk
= blkaddr
;
899 } else if ((map
->m_pblk
!= NEW_ADDR
&&
900 blkaddr
== (map
->m_pblk
+ ofs
)) ||
901 (map
->m_pblk
== NEW_ADDR
&& blkaddr
== NEW_ADDR
) ||
902 flag
== F2FS_GET_BLOCK_PRE_DIO
) {
913 /* preallocate blocks in batch for one dnode page */
914 if (flag
== F2FS_GET_BLOCK_PRE_AIO
&&
915 (pgofs
== end
|| dn
.ofs_in_node
== end_offset
)) {
917 dn
.ofs_in_node
= ofs_in_node
;
918 err
= reserve_new_blocks(&dn
, prealloc
);
922 map
->m_len
+= dn
.ofs_in_node
- ofs_in_node
;
923 if (prealloc
&& dn
.ofs_in_node
!= last_ofs_in_node
+ 1) {
927 dn
.ofs_in_node
= end_offset
;
932 else if (dn
.ofs_in_node
< end_offset
)
939 f2fs_balance_fs(sbi
, dn
.node_changed
);
948 f2fs_balance_fs(sbi
, dn
.node_changed
);
951 trace_f2fs_map_blocks(inode
, map
, err
);
955 static int __get_data_block(struct inode
*inode
, sector_t iblock
,
956 struct buffer_head
*bh
, int create
, int flag
,
959 struct f2fs_map_blocks map
;
963 map
.m_len
= bh
->b_size
>> inode
->i_blkbits
;
964 map
.m_next_pgofs
= next_pgofs
;
966 err
= f2fs_map_blocks(inode
, &map
, create
, flag
);
968 map_bh(bh
, inode
->i_sb
, map
.m_pblk
);
969 bh
->b_state
= (bh
->b_state
& ~F2FS_MAP_FLAGS
) | map
.m_flags
;
970 bh
->b_size
= (u64
)map
.m_len
<< inode
->i_blkbits
;
975 static int get_data_block(struct inode
*inode
, sector_t iblock
,
976 struct buffer_head
*bh_result
, int create
, int flag
,
979 return __get_data_block(inode
, iblock
, bh_result
, create
,
983 static int get_data_block_dio(struct inode
*inode
, sector_t iblock
,
984 struct buffer_head
*bh_result
, int create
)
986 return __get_data_block(inode
, iblock
, bh_result
, create
,
987 F2FS_GET_BLOCK_DIO
, NULL
);
990 static int get_data_block_bmap(struct inode
*inode
, sector_t iblock
,
991 struct buffer_head
*bh_result
, int create
)
993 /* Block number less than F2FS MAX BLOCKS */
994 if (unlikely(iblock
>= F2FS_I_SB(inode
)->max_file_blocks
))
997 return __get_data_block(inode
, iblock
, bh_result
, create
,
998 F2FS_GET_BLOCK_BMAP
, NULL
);
1001 static inline sector_t
logical_to_blk(struct inode
*inode
, loff_t offset
)
1003 return (offset
>> inode
->i_blkbits
);
1006 static inline loff_t
blk_to_logical(struct inode
*inode
, sector_t blk
)
1008 return (blk
<< inode
->i_blkbits
);
1011 int f2fs_fiemap(struct inode
*inode
, struct fiemap_extent_info
*fieinfo
,
1014 struct buffer_head map_bh
;
1015 sector_t start_blk
, last_blk
;
1017 u64 logical
= 0, phys
= 0, size
= 0;
1021 ret
= fiemap_check_flags(fieinfo
, FIEMAP_FLAG_SYNC
);
1025 if (f2fs_has_inline_data(inode
)) {
1026 ret
= f2fs_inline_data_fiemap(inode
, fieinfo
, start
, len
);
1033 if (logical_to_blk(inode
, len
) == 0)
1034 len
= blk_to_logical(inode
, 1);
1036 start_blk
= logical_to_blk(inode
, start
);
1037 last_blk
= logical_to_blk(inode
, start
+ len
- 1);
1040 memset(&map_bh
, 0, sizeof(struct buffer_head
));
1041 map_bh
.b_size
= len
;
1043 ret
= get_data_block(inode
, start_blk
, &map_bh
, 0,
1044 F2FS_GET_BLOCK_FIEMAP
, &next_pgofs
);
1049 if (!buffer_mapped(&map_bh
)) {
1050 start_blk
= next_pgofs
;
1052 if (blk_to_logical(inode
, start_blk
) < blk_to_logical(inode
,
1053 F2FS_I_SB(inode
)->max_file_blocks
))
1056 flags
|= FIEMAP_EXTENT_LAST
;
1060 if (f2fs_encrypted_inode(inode
))
1061 flags
|= FIEMAP_EXTENT_DATA_ENCRYPTED
;
1063 ret
= fiemap_fill_next_extent(fieinfo
, logical
,
1067 if (start_blk
> last_blk
|| ret
)
1070 logical
= blk_to_logical(inode
, start_blk
);
1071 phys
= blk_to_logical(inode
, map_bh
.b_blocknr
);
1072 size
= map_bh
.b_size
;
1074 if (buffer_unwritten(&map_bh
))
1075 flags
= FIEMAP_EXTENT_UNWRITTEN
;
1077 start_blk
+= logical_to_blk(inode
, size
);
1081 if (fatal_signal_pending(current
))
1089 inode_unlock(inode
);
1093 static struct bio
*f2fs_grab_bio(struct inode
*inode
, block_t blkaddr
,
1096 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1097 struct fscrypt_ctx
*ctx
= NULL
;
1100 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
)) {
1101 ctx
= fscrypt_get_ctx(inode
, GFP_NOFS
);
1103 return ERR_CAST(ctx
);
1105 /* wait the page to be moved by cleaning */
1106 f2fs_wait_on_encrypted_page_writeback(sbi
, blkaddr
);
1109 bio
= bio_alloc(GFP_KERNEL
, min_t(int, nr_pages
, BIO_MAX_PAGES
));
1112 fscrypt_release_ctx(ctx
);
1113 return ERR_PTR(-ENOMEM
);
1115 f2fs_target_device(sbi
, blkaddr
, bio
);
1116 bio
->bi_end_io
= f2fs_read_end_io
;
1117 bio
->bi_private
= ctx
;
1123 * This function was originally taken from fs/mpage.c, and customized for f2fs.
1124 * Major change was from block_size == page_size in f2fs by default.
1126 static int f2fs_mpage_readpages(struct address_space
*mapping
,
1127 struct list_head
*pages
, struct page
*page
,
1130 struct bio
*bio
= NULL
;
1132 sector_t last_block_in_bio
= 0;
1133 struct inode
*inode
= mapping
->host
;
1134 const unsigned blkbits
= inode
->i_blkbits
;
1135 const unsigned blocksize
= 1 << blkbits
;
1136 sector_t block_in_file
;
1137 sector_t last_block
;
1138 sector_t last_block_in_file
;
1140 struct f2fs_map_blocks map
;
1146 map
.m_next_pgofs
= NULL
;
1148 for (page_idx
= 0; nr_pages
; page_idx
++, nr_pages
--) {
1150 prefetchw(&page
->flags
);
1152 page
= list_last_entry(pages
, struct page
, lru
);
1153 list_del(&page
->lru
);
1154 if (add_to_page_cache_lru(page
, mapping
,
1156 readahead_gfp_mask(mapping
)))
1160 block_in_file
= (sector_t
)page
->index
;
1161 last_block
= block_in_file
+ nr_pages
;
1162 last_block_in_file
= (i_size_read(inode
) + blocksize
- 1) >>
1164 if (last_block
> last_block_in_file
)
1165 last_block
= last_block_in_file
;
1168 * Map blocks using the previous result first.
1170 if ((map
.m_flags
& F2FS_MAP_MAPPED
) &&
1171 block_in_file
> map
.m_lblk
&&
1172 block_in_file
< (map
.m_lblk
+ map
.m_len
))
1176 * Then do more f2fs_map_blocks() calls until we are
1177 * done with this page.
1181 if (block_in_file
< last_block
) {
1182 map
.m_lblk
= block_in_file
;
1183 map
.m_len
= last_block
- block_in_file
;
1185 if (f2fs_map_blocks(inode
, &map
, 0,
1186 F2FS_GET_BLOCK_READ
))
1187 goto set_error_page
;
1190 if ((map
.m_flags
& F2FS_MAP_MAPPED
)) {
1191 block_nr
= map
.m_pblk
+ block_in_file
- map
.m_lblk
;
1192 SetPageMappedToDisk(page
);
1194 if (!PageUptodate(page
) && !cleancache_get_page(page
)) {
1195 SetPageUptodate(page
);
1199 zero_user_segment(page
, 0, PAGE_SIZE
);
1200 if (!PageUptodate(page
))
1201 SetPageUptodate(page
);
1207 * This page will go to BIO. Do we need to send this
1210 if (bio
&& (last_block_in_bio
!= block_nr
- 1 ||
1211 !__same_bdev(F2FS_I_SB(inode
), block_nr
, bio
))) {
1213 __submit_bio(F2FS_I_SB(inode
), bio
, DATA
);
1217 bio
= f2fs_grab_bio(inode
, block_nr
, nr_pages
);
1220 goto set_error_page
;
1222 bio_set_op_attrs(bio
, REQ_OP_READ
, 0);
1225 if (bio_add_page(bio
, page
, blocksize
, 0) < blocksize
)
1226 goto submit_and_realloc
;
1228 last_block_in_bio
= block_nr
;
1232 zero_user_segment(page
, 0, PAGE_SIZE
);
1237 __submit_bio(F2FS_I_SB(inode
), bio
, DATA
);
1245 BUG_ON(pages
&& !list_empty(pages
));
1247 __submit_bio(F2FS_I_SB(inode
), bio
, DATA
);
1251 static int f2fs_read_data_page(struct file
*file
, struct page
*page
)
1253 struct inode
*inode
= page
->mapping
->host
;
1256 trace_f2fs_readpage(page
, DATA
);
1258 /* If the file has inline data, try to read it directly */
1259 if (f2fs_has_inline_data(inode
))
1260 ret
= f2fs_read_inline_data(inode
, page
);
1262 ret
= f2fs_mpage_readpages(page
->mapping
, NULL
, page
, 1);
1266 static int f2fs_read_data_pages(struct file
*file
,
1267 struct address_space
*mapping
,
1268 struct list_head
*pages
, unsigned nr_pages
)
1270 struct inode
*inode
= file
->f_mapping
->host
;
1271 struct page
*page
= list_last_entry(pages
, struct page
, lru
);
1273 trace_f2fs_readpages(inode
, page
, nr_pages
);
1275 /* If the file has inline data, skip readpages */
1276 if (f2fs_has_inline_data(inode
))
1279 return f2fs_mpage_readpages(mapping
, pages
, NULL
, nr_pages
);
1282 int do_write_data_page(struct f2fs_io_info
*fio
)
1284 struct page
*page
= fio
->page
;
1285 struct inode
*inode
= page
->mapping
->host
;
1286 struct dnode_of_data dn
;
1289 set_new_dnode(&dn
, inode
, NULL
, NULL
, 0);
1290 err
= get_dnode_of_data(&dn
, page
->index
, LOOKUP_NODE
);
1294 fio
->old_blkaddr
= dn
.data_blkaddr
;
1296 /* This page is already truncated */
1297 if (fio
->old_blkaddr
== NULL_ADDR
) {
1298 ClearPageUptodate(page
);
1302 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
)) {
1303 gfp_t gfp_flags
= GFP_NOFS
;
1305 /* wait for GCed encrypted page writeback */
1306 f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode
),
1309 fio
->encrypted_page
= fscrypt_encrypt_page(inode
, fio
->page
,
1313 if (IS_ERR(fio
->encrypted_page
)) {
1314 err
= PTR_ERR(fio
->encrypted_page
);
1315 if (err
== -ENOMEM
) {
1316 /* flush pending ios and wait for a while */
1317 f2fs_flush_merged_bios(F2FS_I_SB(inode
));
1318 congestion_wait(BLK_RW_ASYNC
, HZ
/50);
1319 gfp_flags
|= __GFP_NOFAIL
;
1327 set_page_writeback(page
);
1330 * If current allocation needs SSR,
1331 * it had better in-place writes for updated data.
1333 if (unlikely(fio
->old_blkaddr
!= NEW_ADDR
&&
1334 !is_cold_data(page
) &&
1335 !IS_ATOMIC_WRITTEN_PAGE(page
) &&
1336 need_inplace_update(inode
))) {
1337 rewrite_data_page(fio
);
1338 set_inode_flag(inode
, FI_UPDATE_WRITE
);
1339 trace_f2fs_do_write_data_page(page
, IPU
);
1341 write_data_page(&dn
, fio
);
1342 trace_f2fs_do_write_data_page(page
, OPU
);
1343 set_inode_flag(inode
, FI_APPEND_WRITE
);
1344 if (page
->index
== 0)
1345 set_inode_flag(inode
, FI_FIRST_BLOCK_WRITTEN
);
1348 f2fs_put_dnode(&dn
);
1352 static int __write_data_page(struct page
*page
, bool *submitted
,
1353 struct writeback_control
*wbc
)
1355 struct inode
*inode
= page
->mapping
->host
;
1356 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1357 loff_t i_size
= i_size_read(inode
);
1358 const pgoff_t end_index
= ((unsigned long long) i_size
)
1360 loff_t psize
= (page
->index
+ 1) << PAGE_SHIFT
;
1361 unsigned offset
= 0;
1362 bool need_balance_fs
= false;
1364 struct f2fs_io_info fio
= {
1368 .op_flags
= wbc_to_write_flags(wbc
),
1370 .encrypted_page
= NULL
,
1374 trace_f2fs_writepage(page
, DATA
);
1376 if (page
->index
< end_index
)
1380 * If the offset is out-of-range of file size,
1381 * this page does not have to be written to disk.
1383 offset
= i_size
& (PAGE_SIZE
- 1);
1384 if ((page
->index
>= end_index
+ 1) || !offset
)
1387 zero_user_segment(page
, offset
, PAGE_SIZE
);
1389 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
1391 if (f2fs_is_drop_cache(inode
))
1393 /* we should not write 0'th page having journal header */
1394 if (f2fs_is_volatile_file(inode
) && (!page
->index
||
1395 (!wbc
->for_reclaim
&&
1396 available_free_memory(sbi
, BASE_CHECK
))))
1399 /* we should bypass data pages to proceed the kworkder jobs */
1400 if (unlikely(f2fs_cp_error(sbi
))) {
1401 mapping_set_error(page
->mapping
, -EIO
);
1405 /* Dentry blocks are controlled by checkpoint */
1406 if (S_ISDIR(inode
->i_mode
)) {
1407 err
= do_write_data_page(&fio
);
1411 if (!wbc
->for_reclaim
)
1412 need_balance_fs
= true;
1413 else if (has_not_enough_free_secs(sbi
, 0, 0))
1418 if (f2fs_has_inline_data(inode
))
1419 err
= f2fs_write_inline_data(inode
, page
);
1421 err
= do_write_data_page(&fio
);
1422 if (F2FS_I(inode
)->last_disk_size
< psize
)
1423 F2FS_I(inode
)->last_disk_size
= psize
;
1424 f2fs_unlock_op(sbi
);
1426 if (err
&& err
!= -ENOENT
)
1430 inode_dec_dirty_pages(inode
);
1432 ClearPageUptodate(page
);
1434 if (wbc
->for_reclaim
) {
1435 f2fs_submit_merged_bio_cond(sbi
, inode
, 0, page
->index
,
1437 remove_dirty_inode(inode
);
1442 f2fs_balance_fs(sbi
, need_balance_fs
);
1444 if (unlikely(f2fs_cp_error(sbi
))) {
1445 f2fs_submit_merged_bio(sbi
, DATA
, WRITE
);
1450 *submitted
= fio
.submitted
;
1455 redirty_page_for_writepage(wbc
, page
);
1457 return AOP_WRITEPAGE_ACTIVATE
;
1462 static int f2fs_write_data_page(struct page
*page
,
1463 struct writeback_control
*wbc
)
1465 return __write_data_page(page
, NULL
, wbc
);
1469 * This function was copied from write_cche_pages from mm/page-writeback.c.
1470 * The major change is making write step of cold data page separately from
1471 * warm/hot data page.
1473 static int f2fs_write_cache_pages(struct address_space
*mapping
,
1474 struct writeback_control
*wbc
)
1478 struct pagevec pvec
;
1480 pgoff_t
uninitialized_var(writeback_index
);
1482 pgoff_t end
; /* Inclusive */
1484 pgoff_t last_idx
= ULONG_MAX
;
1486 int range_whole
= 0;
1489 pagevec_init(&pvec
, 0);
1491 if (wbc
->range_cyclic
) {
1492 writeback_index
= mapping
->writeback_index
; /* prev offset */
1493 index
= writeback_index
;
1500 index
= wbc
->range_start
>> PAGE_SHIFT
;
1501 end
= wbc
->range_end
>> PAGE_SHIFT
;
1502 if (wbc
->range_start
== 0 && wbc
->range_end
== LLONG_MAX
)
1504 cycled
= 1; /* ignore range_cyclic tests */
1506 if (wbc
->sync_mode
== WB_SYNC_ALL
|| wbc
->tagged_writepages
)
1507 tag
= PAGECACHE_TAG_TOWRITE
;
1509 tag
= PAGECACHE_TAG_DIRTY
;
1511 if (wbc
->sync_mode
== WB_SYNC_ALL
|| wbc
->tagged_writepages
)
1512 tag_pages_for_writeback(mapping
, index
, end
);
1514 while (!done
&& (index
<= end
)) {
1517 nr_pages
= pagevec_lookup_tag(&pvec
, mapping
, &index
, tag
,
1518 min(end
- index
, (pgoff_t
)PAGEVEC_SIZE
- 1) + 1);
1522 for (i
= 0; i
< nr_pages
; i
++) {
1523 struct page
*page
= pvec
.pages
[i
];
1524 bool submitted
= false;
1526 if (page
->index
> end
) {
1531 done_index
= page
->index
;
1535 if (unlikely(page
->mapping
!= mapping
)) {
1541 if (!PageDirty(page
)) {
1542 /* someone wrote it for us */
1543 goto continue_unlock
;
1546 if (PageWriteback(page
)) {
1547 if (wbc
->sync_mode
!= WB_SYNC_NONE
)
1548 f2fs_wait_on_page_writeback(page
,
1551 goto continue_unlock
;
1554 BUG_ON(PageWriteback(page
));
1555 if (!clear_page_dirty_for_io(page
))
1556 goto continue_unlock
;
1558 ret
= __write_data_page(page
, &submitted
, wbc
);
1559 if (unlikely(ret
)) {
1561 * keep nr_to_write, since vfs uses this to
1562 * get # of written pages.
1564 if (ret
== AOP_WRITEPAGE_ACTIVATE
) {
1569 done_index
= page
->index
+ 1;
1572 } else if (submitted
) {
1573 last_idx
= page
->index
;
1576 if (--wbc
->nr_to_write
<= 0 &&
1577 wbc
->sync_mode
== WB_SYNC_NONE
) {
1582 pagevec_release(&pvec
);
1586 if (!cycled
&& !done
) {
1589 end
= writeback_index
- 1;
1592 if (wbc
->range_cyclic
|| (range_whole
&& wbc
->nr_to_write
> 0))
1593 mapping
->writeback_index
= done_index
;
1595 if (last_idx
!= ULONG_MAX
)
1596 f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping
), mapping
->host
,
1597 0, last_idx
, DATA
, WRITE
);
1602 static int f2fs_write_data_pages(struct address_space
*mapping
,
1603 struct writeback_control
*wbc
)
1605 struct inode
*inode
= mapping
->host
;
1606 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1607 struct blk_plug plug
;
1610 /* deal with chardevs and other special file */
1611 if (!mapping
->a_ops
->writepage
)
1614 /* skip writing if there is no dirty page in this inode */
1615 if (!get_dirty_pages(inode
) && wbc
->sync_mode
== WB_SYNC_NONE
)
1618 if (S_ISDIR(inode
->i_mode
) && wbc
->sync_mode
== WB_SYNC_NONE
&&
1619 get_dirty_pages(inode
) < nr_pages_to_skip(sbi
, DATA
) &&
1620 available_free_memory(sbi
, DIRTY_DENTS
))
1623 /* skip writing during file defragment */
1624 if (is_inode_flag_set(inode
, FI_DO_DEFRAG
))
1627 /* during POR, we don't need to trigger writepage at all. */
1628 if (unlikely(is_sbi_flag_set(sbi
, SBI_POR_DOING
)))
1631 trace_f2fs_writepages(mapping
->host
, wbc
, DATA
);
1633 blk_start_plug(&plug
);
1634 ret
= f2fs_write_cache_pages(mapping
, wbc
);
1635 blk_finish_plug(&plug
);
1637 * if some pages were truncated, we cannot guarantee its mapping->host
1638 * to detect pending bios.
1641 remove_dirty_inode(inode
);
1645 wbc
->pages_skipped
+= get_dirty_pages(inode
);
1646 trace_f2fs_writepages(mapping
->host
, wbc
, DATA
);
1650 static void f2fs_write_failed(struct address_space
*mapping
, loff_t to
)
1652 struct inode
*inode
= mapping
->host
;
1653 loff_t i_size
= i_size_read(inode
);
1656 truncate_pagecache(inode
, i_size
);
1657 truncate_blocks(inode
, i_size
, true);
1661 static int prepare_write_begin(struct f2fs_sb_info
*sbi
,
1662 struct page
*page
, loff_t pos
, unsigned len
,
1663 block_t
*blk_addr
, bool *node_changed
)
1665 struct inode
*inode
= page
->mapping
->host
;
1666 pgoff_t index
= page
->index
;
1667 struct dnode_of_data dn
;
1669 bool locked
= false;
1670 struct extent_info ei
= {0,0,0};
1674 * we already allocated all the blocks, so we don't need to get
1675 * the block addresses when there is no need to fill the page.
1677 if (!f2fs_has_inline_data(inode
) && len
== PAGE_SIZE
&&
1678 !is_inode_flag_set(inode
, FI_NO_PREALLOC
))
1681 if (f2fs_has_inline_data(inode
) ||
1682 (pos
& PAGE_MASK
) >= i_size_read(inode
)) {
1687 /* check inline_data */
1688 ipage
= get_node_page(sbi
, inode
->i_ino
);
1689 if (IS_ERR(ipage
)) {
1690 err
= PTR_ERR(ipage
);
1694 set_new_dnode(&dn
, inode
, ipage
, ipage
, 0);
1696 if (f2fs_has_inline_data(inode
)) {
1697 if (pos
+ len
<= MAX_INLINE_DATA
) {
1698 read_inline_data(page
, ipage
);
1699 set_inode_flag(inode
, FI_DATA_EXIST
);
1701 set_inline_node(ipage
);
1703 err
= f2fs_convert_inline_page(&dn
, page
);
1706 if (dn
.data_blkaddr
== NULL_ADDR
)
1707 err
= f2fs_get_block(&dn
, index
);
1709 } else if (locked
) {
1710 err
= f2fs_get_block(&dn
, index
);
1712 if (f2fs_lookup_extent_cache(inode
, index
, &ei
)) {
1713 dn
.data_blkaddr
= ei
.blk
+ index
- ei
.fofs
;
1716 err
= get_dnode_of_data(&dn
, index
, LOOKUP_NODE
);
1717 if (err
|| dn
.data_blkaddr
== NULL_ADDR
) {
1718 f2fs_put_dnode(&dn
);
1726 /* convert_inline_page can make node_changed */
1727 *blk_addr
= dn
.data_blkaddr
;
1728 *node_changed
= dn
.node_changed
;
1730 f2fs_put_dnode(&dn
);
1733 f2fs_unlock_op(sbi
);
1737 static int f2fs_write_begin(struct file
*file
, struct address_space
*mapping
,
1738 loff_t pos
, unsigned len
, unsigned flags
,
1739 struct page
**pagep
, void **fsdata
)
1741 struct inode
*inode
= mapping
->host
;
1742 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1743 struct page
*page
= NULL
;
1744 pgoff_t index
= ((unsigned long long) pos
) >> PAGE_SHIFT
;
1745 bool need_balance
= false;
1746 block_t blkaddr
= NULL_ADDR
;
1749 trace_f2fs_write_begin(inode
, pos
, len
, flags
);
1752 * We should check this at this moment to avoid deadlock on inode page
1753 * and #0 page. The locking rule for inline_data conversion should be:
1754 * lock_page(page #0) -> lock_page(inode_page)
1757 err
= f2fs_convert_inline_inode(inode
);
1763 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
1764 * wait_for_stable_page. Will wait that below with our IO control.
1766 page
= pagecache_get_page(mapping
, index
,
1767 FGP_LOCK
| FGP_WRITE
| FGP_CREAT
, GFP_NOFS
);
1775 err
= prepare_write_begin(sbi
, page
, pos
, len
,
1776 &blkaddr
, &need_balance
);
1780 if (need_balance
&& has_not_enough_free_secs(sbi
, 0, 0)) {
1782 f2fs_balance_fs(sbi
, true);
1784 if (page
->mapping
!= mapping
) {
1785 /* The page got truncated from under us */
1786 f2fs_put_page(page
, 1);
1791 f2fs_wait_on_page_writeback(page
, DATA
, false);
1793 /* wait for GCed encrypted page writeback */
1794 if (f2fs_encrypted_inode(inode
) && S_ISREG(inode
->i_mode
))
1795 f2fs_wait_on_encrypted_page_writeback(sbi
, blkaddr
);
1797 if (len
== PAGE_SIZE
|| PageUptodate(page
))
1800 if (!(pos
& (PAGE_SIZE
- 1)) && (pos
+ len
) >= i_size_read(inode
)) {
1801 zero_user_segment(page
, len
, PAGE_SIZE
);
1805 if (blkaddr
== NEW_ADDR
) {
1806 zero_user_segment(page
, 0, PAGE_SIZE
);
1807 SetPageUptodate(page
);
1811 bio
= f2fs_grab_bio(inode
, blkaddr
, 1);
1816 bio
->bi_opf
= REQ_OP_READ
;
1817 if (bio_add_page(bio
, page
, PAGE_SIZE
, 0) < PAGE_SIZE
) {
1823 __submit_bio(sbi
, bio
, DATA
);
1826 if (unlikely(page
->mapping
!= mapping
)) {
1827 f2fs_put_page(page
, 1);
1830 if (unlikely(!PageUptodate(page
))) {
1838 f2fs_put_page(page
, 1);
1839 f2fs_write_failed(mapping
, pos
+ len
);
1843 static int f2fs_write_end(struct file
*file
,
1844 struct address_space
*mapping
,
1845 loff_t pos
, unsigned len
, unsigned copied
,
1846 struct page
*page
, void *fsdata
)
1848 struct inode
*inode
= page
->mapping
->host
;
1850 trace_f2fs_write_end(inode
, pos
, len
, copied
);
1853 * This should be come from len == PAGE_SIZE, and we expect copied
1854 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
1855 * let generic_perform_write() try to copy data again through copied=0.
1857 if (!PageUptodate(page
)) {
1858 if (unlikely(copied
!= len
))
1861 SetPageUptodate(page
);
1866 set_page_dirty(page
);
1868 if (pos
+ copied
> i_size_read(inode
))
1869 f2fs_i_size_write(inode
, pos
+ copied
);
1871 f2fs_put_page(page
, 1);
1872 f2fs_update_time(F2FS_I_SB(inode
), REQ_TIME
);
1876 static int check_direct_IO(struct inode
*inode
, struct iov_iter
*iter
,
1879 unsigned blocksize_mask
= inode
->i_sb
->s_blocksize
- 1;
1881 if (offset
& blocksize_mask
)
1884 if (iov_iter_alignment(iter
) & blocksize_mask
)
1890 static ssize_t
f2fs_direct_IO(struct kiocb
*iocb
, struct iov_iter
*iter
)
1892 struct address_space
*mapping
= iocb
->ki_filp
->f_mapping
;
1893 struct inode
*inode
= mapping
->host
;
1894 size_t count
= iov_iter_count(iter
);
1895 loff_t offset
= iocb
->ki_pos
;
1896 int rw
= iov_iter_rw(iter
);
1899 err
= check_direct_IO(inode
, iter
, offset
);
1903 if (__force_buffered_io(inode
, rw
))
1906 trace_f2fs_direct_IO_enter(inode
, offset
, count
, rw
);
1908 down_read(&F2FS_I(inode
)->dio_rwsem
[rw
]);
1909 err
= blockdev_direct_IO(iocb
, inode
, iter
, get_data_block_dio
);
1910 up_read(&F2FS_I(inode
)->dio_rwsem
[rw
]);
1914 set_inode_flag(inode
, FI_UPDATE_WRITE
);
1916 f2fs_write_failed(mapping
, offset
+ count
);
1919 trace_f2fs_direct_IO_exit(inode
, offset
, count
, rw
, err
);
1924 void f2fs_invalidate_page(struct page
*page
, unsigned int offset
,
1925 unsigned int length
)
1927 struct inode
*inode
= page
->mapping
->host
;
1928 struct f2fs_sb_info
*sbi
= F2FS_I_SB(inode
);
1930 if (inode
->i_ino
>= F2FS_ROOT_INO(sbi
) &&
1931 (offset
% PAGE_SIZE
|| length
!= PAGE_SIZE
))
1934 if (PageDirty(page
)) {
1935 if (inode
->i_ino
== F2FS_META_INO(sbi
)) {
1936 dec_page_count(sbi
, F2FS_DIRTY_META
);
1937 } else if (inode
->i_ino
== F2FS_NODE_INO(sbi
)) {
1938 dec_page_count(sbi
, F2FS_DIRTY_NODES
);
1940 inode_dec_dirty_pages(inode
);
1941 remove_dirty_inode(inode
);
1945 /* This is atomic written page, keep Private */
1946 if (IS_ATOMIC_WRITTEN_PAGE(page
))
1949 set_page_private(page
, 0);
1950 ClearPagePrivate(page
);
1953 int f2fs_release_page(struct page
*page
, gfp_t wait
)
1955 /* If this is dirty page, keep PagePrivate */
1956 if (PageDirty(page
))
1959 /* This is atomic written page, keep Private */
1960 if (IS_ATOMIC_WRITTEN_PAGE(page
))
1963 set_page_private(page
, 0);
1964 ClearPagePrivate(page
);
1969 * This was copied from __set_page_dirty_buffers which gives higher performance
1970 * in very high speed storages. (e.g., pmem)
1972 void f2fs_set_page_dirty_nobuffers(struct page
*page
)
1974 struct address_space
*mapping
= page
->mapping
;
1975 unsigned long flags
;
1977 if (unlikely(!mapping
))
1980 spin_lock(&mapping
->private_lock
);
1981 lock_page_memcg(page
);
1983 spin_unlock(&mapping
->private_lock
);
1985 spin_lock_irqsave(&mapping
->tree_lock
, flags
);
1986 WARN_ON_ONCE(!PageUptodate(page
));
1987 account_page_dirtied(page
, mapping
);
1988 radix_tree_tag_set(&mapping
->page_tree
,
1989 page_index(page
), PAGECACHE_TAG_DIRTY
);
1990 spin_unlock_irqrestore(&mapping
->tree_lock
, flags
);
1991 unlock_page_memcg(page
);
1993 __mark_inode_dirty(mapping
->host
, I_DIRTY_PAGES
);
1997 static int f2fs_set_data_page_dirty(struct page
*page
)
1999 struct address_space
*mapping
= page
->mapping
;
2000 struct inode
*inode
= mapping
->host
;
2002 trace_f2fs_set_page_dirty(page
, DATA
);
2004 if (!PageUptodate(page
))
2005 SetPageUptodate(page
);
2007 if (f2fs_is_atomic_file(inode
) && !f2fs_is_commit_atomic_write(inode
)) {
2008 if (!IS_ATOMIC_WRITTEN_PAGE(page
)) {
2009 register_inmem_page(inode
, page
);
2013 * Previously, this page has been registered, we just
2019 if (!PageDirty(page
)) {
2020 f2fs_set_page_dirty_nobuffers(page
);
2021 update_dirty_page(inode
, page
);
2027 static sector_t
f2fs_bmap(struct address_space
*mapping
, sector_t block
)
2029 struct inode
*inode
= mapping
->host
;
2031 if (f2fs_has_inline_data(inode
))
2034 /* make sure allocating whole blocks */
2035 if (mapping_tagged(mapping
, PAGECACHE_TAG_DIRTY
))
2036 filemap_write_and_wait(mapping
);
2038 return generic_block_bmap(mapping
, block
, get_data_block_bmap
);
2041 #ifdef CONFIG_MIGRATION
2042 #include <linux/migrate.h>
2044 int f2fs_migrate_page(struct address_space
*mapping
,
2045 struct page
*newpage
, struct page
*page
, enum migrate_mode mode
)
2047 int rc
, extra_count
;
2048 struct f2fs_inode_info
*fi
= F2FS_I(mapping
->host
);
2049 bool atomic_written
= IS_ATOMIC_WRITTEN_PAGE(page
);
2051 BUG_ON(PageWriteback(page
));
2053 /* migrating an atomic written page is safe with the inmem_lock hold */
2054 if (atomic_written
&& !mutex_trylock(&fi
->inmem_lock
))
2058 * A reference is expected if PagePrivate set when move mapping,
2059 * however F2FS breaks this for maintaining dirty page counts when
2060 * truncating pages. So here adjusting the 'extra_count' make it work.
2062 extra_count
= (atomic_written
? 1 : 0) - page_has_private(page
);
2063 rc
= migrate_page_move_mapping(mapping
, newpage
,
2064 page
, NULL
, mode
, extra_count
);
2065 if (rc
!= MIGRATEPAGE_SUCCESS
) {
2067 mutex_unlock(&fi
->inmem_lock
);
2071 if (atomic_written
) {
2072 struct inmem_pages
*cur
;
2073 list_for_each_entry(cur
, &fi
->inmem_pages
, list
)
2074 if (cur
->page
== page
) {
2075 cur
->page
= newpage
;
2078 mutex_unlock(&fi
->inmem_lock
);
2083 if (PagePrivate(page
))
2084 SetPagePrivate(newpage
);
2085 set_page_private(newpage
, page_private(page
));
2087 migrate_page_copy(newpage
, page
);
2089 return MIGRATEPAGE_SUCCESS
;
2093 const struct address_space_operations f2fs_dblock_aops
= {
2094 .readpage
= f2fs_read_data_page
,
2095 .readpages
= f2fs_read_data_pages
,
2096 .writepage
= f2fs_write_data_page
,
2097 .writepages
= f2fs_write_data_pages
,
2098 .write_begin
= f2fs_write_begin
,
2099 .write_end
= f2fs_write_end
,
2100 .set_page_dirty
= f2fs_set_data_page_dirty
,
2101 .invalidatepage
= f2fs_invalidate_page
,
2102 .releasepage
= f2fs_release_page
,
2103 .direct_IO
= f2fs_direct_IO
,
2105 #ifdef CONFIG_MIGRATION
2106 .migratepage
= f2fs_migrate_page
,