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 void f2fs_read_end_io(struct bio *bio)
37 if (f2fs_bio_encrypted(bio)) {
39 fscrypt_release_ctx(bio->bi_private);
41 fscrypt_decrypt_bio_pages(bio->bi_private, bio);
46 bio_for_each_segment_all(bvec, bio, i) {
47 struct page *page = bvec->bv_page;
50 if (!PageUptodate(page))
51 SetPageUptodate(page);
53 ClearPageUptodate(page);
61 static void f2fs_write_end_io(struct bio *bio)
63 struct f2fs_sb_info *sbi = bio->bi_private;
67 bio_for_each_segment_all(bvec, bio, i) {
68 struct page *page = bvec->bv_page;
70 fscrypt_pullback_bio_page(&page, true);
72 if (unlikely(bio->bi_error)) {
73 set_bit(AS_EIO, &page->mapping->flags);
74 f2fs_stop_checkpoint(sbi, true);
76 end_page_writeback(page);
78 if (atomic_dec_and_test(&sbi->nr_wb_bios) &&
79 wq_has_sleeper(&sbi->cp_wait))
80 wake_up(&sbi->cp_wait);
86 * Low-level block read/write IO operations.
88 static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr,
89 int npages, bool is_read)
93 bio = f2fs_bio_alloc(npages);
95 bio->bi_bdev = sbi->sb->s_bdev;
96 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
97 bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io;
98 bio->bi_private = is_read ? NULL : sbi;
103 static inline void __submit_bio(struct f2fs_sb_info *sbi,
104 struct bio *bio, enum page_type type)
106 if (!is_read_io(bio_op(bio))) {
107 atomic_inc(&sbi->nr_wb_bios);
108 if (f2fs_sb_mounted_hmsmr(sbi->sb) &&
109 current->plug && (type == DATA || type == NODE))
110 blk_finish_plug(current->plug);
115 static void __submit_merged_bio(struct f2fs_bio_info *io)
117 struct f2fs_io_info *fio = &io->fio;
122 if (is_read_io(fio->op))
123 trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio);
125 trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio);
127 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
129 __submit_bio(io->sbi, io->bio, fio->type);
133 static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
134 struct page *page, nid_t ino)
136 struct bio_vec *bvec;
143 if (!inode && !page && !ino)
146 bio_for_each_segment_all(bvec, io->bio, i) {
148 if (bvec->bv_page->mapping)
149 target = bvec->bv_page;
151 target = fscrypt_control_page(bvec->bv_page);
153 if (inode && inode == target->mapping->host)
155 if (page && page == target)
157 if (ino && ino == ino_of_node(target))
164 static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode,
165 struct page *page, nid_t ino,
168 enum page_type btype = PAGE_TYPE_OF_BIO(type);
169 struct f2fs_bio_info *io = &sbi->write_io[btype];
172 down_read(&io->io_rwsem);
173 ret = __has_merged_page(io, inode, page, ino);
174 up_read(&io->io_rwsem);
178 static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi,
179 struct inode *inode, struct page *page,
180 nid_t ino, enum page_type type, int rw)
182 enum page_type btype = PAGE_TYPE_OF_BIO(type);
183 struct f2fs_bio_info *io;
185 io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype];
187 down_write(&io->io_rwsem);
189 if (!__has_merged_page(io, inode, page, ino))
192 /* change META to META_FLUSH in the checkpoint procedure */
193 if (type >= META_FLUSH) {
194 io->fio.type = META_FLUSH;
195 io->fio.op = REQ_OP_WRITE;
196 if (test_opt(sbi, NOBARRIER))
197 io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO;
199 io->fio.op_flags = WRITE_FLUSH_FUA | REQ_META |
202 __submit_merged_bio(io);
204 up_write(&io->io_rwsem);
207 void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type,
210 __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw);
213 void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi,
214 struct inode *inode, struct page *page,
215 nid_t ino, enum page_type type, int rw)
217 if (has_merged_page(sbi, inode, page, ino, type))
218 __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw);
221 void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi)
223 f2fs_submit_merged_bio(sbi, DATA, WRITE);
224 f2fs_submit_merged_bio(sbi, NODE, WRITE);
225 f2fs_submit_merged_bio(sbi, META, WRITE);
229 * Fill the locked page with data located in the block address.
230 * Return unlocked page.
232 int f2fs_submit_page_bio(struct f2fs_io_info *fio)
235 struct page *page = fio->encrypted_page ?
236 fio->encrypted_page : fio->page;
238 trace_f2fs_submit_page_bio(page, fio);
239 f2fs_trace_ios(fio, 0);
241 /* Allocate a new bio */
242 bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op));
244 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
248 bio->bi_rw = fio->op_flags;
249 bio_set_op_attrs(bio, fio->op, fio->op_flags);
251 __submit_bio(fio->sbi, bio, fio->type);
255 void f2fs_submit_page_mbio(struct f2fs_io_info *fio)
257 struct f2fs_sb_info *sbi = fio->sbi;
258 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
259 struct f2fs_bio_info *io;
260 bool is_read = is_read_io(fio->op);
261 struct page *bio_page;
263 io = is_read ? &sbi->read_io : &sbi->write_io[btype];
265 if (fio->old_blkaddr != NEW_ADDR)
266 verify_block_addr(sbi, fio->old_blkaddr);
267 verify_block_addr(sbi, fio->new_blkaddr);
269 down_write(&io->io_rwsem);
271 if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 ||
272 (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags)))
273 __submit_merged_bio(io);
275 if (io->bio == NULL) {
276 int bio_blocks = MAX_BIO_BLOCKS(sbi);
278 io->bio = __bio_alloc(sbi, fio->new_blkaddr,
279 bio_blocks, is_read);
283 bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
285 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) <
287 __submit_merged_bio(io);
291 io->last_block_in_bio = fio->new_blkaddr;
292 f2fs_trace_ios(fio, 0);
294 up_write(&io->io_rwsem);
295 trace_f2fs_submit_page_mbio(fio->page, fio);
298 static void __set_data_blkaddr(struct dnode_of_data *dn)
300 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
303 /* Get physical address of data block */
304 addr_array = blkaddr_in_node(rn);
305 addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
309 * Lock ordering for the change of data block address:
312 * update block addresses in the node page
314 void set_data_blkaddr(struct dnode_of_data *dn)
316 f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
317 __set_data_blkaddr(dn);
318 if (set_page_dirty(dn->node_page))
319 dn->node_changed = true;
322 void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
324 dn->data_blkaddr = blkaddr;
325 set_data_blkaddr(dn);
326 f2fs_update_extent_cache(dn);
329 /* dn->ofs_in_node will be returned with up-to-date last block pointer */
330 int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
332 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
337 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
339 if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
342 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
343 dn->ofs_in_node, count);
345 f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
347 for (; count > 0; dn->ofs_in_node++) {
349 datablock_addr(dn->node_page, dn->ofs_in_node);
350 if (blkaddr == NULL_ADDR) {
351 dn->data_blkaddr = NEW_ADDR;
352 __set_data_blkaddr(dn);
357 if (set_page_dirty(dn->node_page))
358 dn->node_changed = true;
362 /* Should keep dn->ofs_in_node unchanged */
363 int reserve_new_block(struct dnode_of_data *dn)
365 unsigned int ofs_in_node = dn->ofs_in_node;
368 ret = reserve_new_blocks(dn, 1);
369 dn->ofs_in_node = ofs_in_node;
373 int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
375 bool need_put = dn->inode_page ? false : true;
378 err = get_dnode_of_data(dn, index, ALLOC_NODE);
382 if (dn->data_blkaddr == NULL_ADDR)
383 err = reserve_new_block(dn);
389 int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
391 struct extent_info ei;
392 struct inode *inode = dn->inode;
394 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
395 dn->data_blkaddr = ei.blk + index - ei.fofs;
399 return f2fs_reserve_block(dn, index);
402 struct page *get_read_data_page(struct inode *inode, pgoff_t index,
403 int op_flags, bool for_write)
405 struct address_space *mapping = inode->i_mapping;
406 struct dnode_of_data dn;
408 struct extent_info ei;
410 struct f2fs_io_info fio = {
411 .sbi = F2FS_I_SB(inode),
414 .op_flags = op_flags,
415 .encrypted_page = NULL,
418 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
419 return read_mapping_page(mapping, index, NULL);
421 page = f2fs_grab_cache_page(mapping, index, for_write);
423 return ERR_PTR(-ENOMEM);
425 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
426 dn.data_blkaddr = ei.blk + index - ei.fofs;
430 set_new_dnode(&dn, inode, NULL, NULL, 0);
431 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
436 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
441 if (PageUptodate(page)) {
447 * A new dentry page is allocated but not able to be written, since its
448 * new inode page couldn't be allocated due to -ENOSPC.
449 * In such the case, its blkaddr can be remained as NEW_ADDR.
450 * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata.
452 if (dn.data_blkaddr == NEW_ADDR) {
453 zero_user_segment(page, 0, PAGE_SIZE);
454 if (!PageUptodate(page))
455 SetPageUptodate(page);
460 fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr;
462 err = f2fs_submit_page_bio(&fio);
468 f2fs_put_page(page, 1);
472 struct page *find_data_page(struct inode *inode, pgoff_t index)
474 struct address_space *mapping = inode->i_mapping;
477 page = find_get_page(mapping, index);
478 if (page && PageUptodate(page))
480 f2fs_put_page(page, 0);
482 page = get_read_data_page(inode, index, READ_SYNC, false);
486 if (PageUptodate(page))
489 wait_on_page_locked(page);
490 if (unlikely(!PageUptodate(page))) {
491 f2fs_put_page(page, 0);
492 return ERR_PTR(-EIO);
498 * If it tries to access a hole, return an error.
499 * Because, the callers, functions in dir.c and GC, should be able to know
500 * whether this page exists or not.
502 struct page *get_lock_data_page(struct inode *inode, pgoff_t index,
505 struct address_space *mapping = inode->i_mapping;
508 page = get_read_data_page(inode, index, READ_SYNC, for_write);
512 /* wait for read completion */
514 if (unlikely(page->mapping != mapping)) {
515 f2fs_put_page(page, 1);
518 if (unlikely(!PageUptodate(page))) {
519 f2fs_put_page(page, 1);
520 return ERR_PTR(-EIO);
526 * Caller ensures that this data page is never allocated.
527 * A new zero-filled data page is allocated in the page cache.
529 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
531 * Note that, ipage is set only by make_empty_dir, and if any error occur,
532 * ipage should be released by this function.
534 struct page *get_new_data_page(struct inode *inode,
535 struct page *ipage, pgoff_t index, bool new_i_size)
537 struct address_space *mapping = inode->i_mapping;
539 struct dnode_of_data dn;
542 page = f2fs_grab_cache_page(mapping, index, true);
545 * before exiting, we should make sure ipage will be released
546 * if any error occur.
548 f2fs_put_page(ipage, 1);
549 return ERR_PTR(-ENOMEM);
552 set_new_dnode(&dn, inode, ipage, NULL, 0);
553 err = f2fs_reserve_block(&dn, index);
555 f2fs_put_page(page, 1);
561 if (PageUptodate(page))
564 if (dn.data_blkaddr == NEW_ADDR) {
565 zero_user_segment(page, 0, PAGE_SIZE);
566 if (!PageUptodate(page))
567 SetPageUptodate(page);
569 f2fs_put_page(page, 1);
571 /* if ipage exists, blkaddr should be NEW_ADDR */
572 f2fs_bug_on(F2FS_I_SB(inode), ipage);
573 page = get_lock_data_page(inode, index, true);
578 if (new_i_size && i_size_read(inode) <
579 ((loff_t)(index + 1) << PAGE_SHIFT))
580 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
584 static int __allocate_data_block(struct dnode_of_data *dn)
586 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
587 struct f2fs_summary sum;
589 int seg = CURSEG_WARM_DATA;
593 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
596 dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node);
597 if (dn->data_blkaddr == NEW_ADDR)
600 if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
604 get_node_info(sbi, dn->nid, &ni);
605 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
607 if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page)
608 seg = CURSEG_DIRECT_IO;
610 allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr,
612 set_data_blkaddr(dn);
615 fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) +
617 if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT))
618 f2fs_i_size_write(dn->inode,
619 ((loff_t)(fofs + 1) << PAGE_SHIFT));
623 ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
625 struct inode *inode = file_inode(iocb->ki_filp);
626 struct f2fs_map_blocks map;
629 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
630 map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from));
631 map.m_next_pgofs = NULL;
633 if (f2fs_encrypted_inode(inode))
636 if (iocb->ki_flags & IOCB_DIRECT) {
637 ret = f2fs_convert_inline_inode(inode);
640 return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO);
642 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) {
643 ret = f2fs_convert_inline_inode(inode);
647 if (!f2fs_has_inline_data(inode))
648 return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
653 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
654 * f2fs_map_blocks structure.
655 * If original data blocks are allocated, then give them to blockdev.
657 * a. preallocate requested block addresses
658 * b. do not use extent cache for better performance
659 * c. give the block addresses to blockdev
661 int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
662 int create, int flag)
664 unsigned int maxblocks = map->m_len;
665 struct dnode_of_data dn;
666 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
667 int mode = create ? ALLOC_NODE : LOOKUP_NODE;
668 pgoff_t pgofs, end_offset, end;
669 int err = 0, ofs = 1;
670 unsigned int ofs_in_node, last_ofs_in_node;
672 struct extent_info ei;
673 bool allocated = false;
679 /* it only supports block size == page size */
680 pgofs = (pgoff_t)map->m_lblk;
681 end = pgofs + maxblocks;
683 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
684 map->m_pblk = ei.blk + pgofs - ei.fofs;
685 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
686 map->m_flags = F2FS_MAP_MAPPED;
694 /* When reading holes, we need its node page */
695 set_new_dnode(&dn, inode, NULL, NULL, 0);
696 err = get_dnode_of_data(&dn, pgofs, mode);
698 if (flag == F2FS_GET_BLOCK_BMAP)
700 if (err == -ENOENT) {
702 if (map->m_next_pgofs)
704 get_next_page_offset(&dn, pgofs);
710 ofs_in_node = dn.ofs_in_node;
711 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
714 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
716 if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) {
718 if (unlikely(f2fs_cp_error(sbi))) {
722 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
723 if (blkaddr == NULL_ADDR) {
725 last_ofs_in_node = dn.ofs_in_node;
728 err = __allocate_data_block(&dn);
730 set_inode_flag(inode, FI_APPEND_WRITE);
736 map->m_flags = F2FS_MAP_NEW;
737 blkaddr = dn.data_blkaddr;
739 if (flag == F2FS_GET_BLOCK_BMAP) {
743 if (flag == F2FS_GET_BLOCK_FIEMAP &&
744 blkaddr == NULL_ADDR) {
745 if (map->m_next_pgofs)
746 *map->m_next_pgofs = pgofs + 1;
748 if (flag != F2FS_GET_BLOCK_FIEMAP ||
754 if (flag == F2FS_GET_BLOCK_PRE_AIO)
757 if (map->m_len == 0) {
758 /* preallocated unwritten block should be mapped for fiemap. */
759 if (blkaddr == NEW_ADDR)
760 map->m_flags |= F2FS_MAP_UNWRITTEN;
761 map->m_flags |= F2FS_MAP_MAPPED;
763 map->m_pblk = blkaddr;
765 } else if ((map->m_pblk != NEW_ADDR &&
766 blkaddr == (map->m_pblk + ofs)) ||
767 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
768 flag == F2FS_GET_BLOCK_PRE_DIO) {
779 /* preallocate blocks in batch for one dnode page */
780 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
781 (pgofs == end || dn.ofs_in_node == end_offset)) {
783 dn.ofs_in_node = ofs_in_node;
784 err = reserve_new_blocks(&dn, prealloc);
788 map->m_len += dn.ofs_in_node - ofs_in_node;
789 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
793 dn.ofs_in_node = end_offset;
798 else if (dn.ofs_in_node < end_offset)
805 f2fs_balance_fs(sbi, allocated);
815 f2fs_balance_fs(sbi, allocated);
818 trace_f2fs_map_blocks(inode, map, err);
822 static int __get_data_block(struct inode *inode, sector_t iblock,
823 struct buffer_head *bh, int create, int flag,
826 struct f2fs_map_blocks map;
830 map.m_len = bh->b_size >> inode->i_blkbits;
831 map.m_next_pgofs = next_pgofs;
833 ret = f2fs_map_blocks(inode, &map, create, flag);
835 map_bh(bh, inode->i_sb, map.m_pblk);
836 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
837 bh->b_size = map.m_len << inode->i_blkbits;
842 static int get_data_block(struct inode *inode, sector_t iblock,
843 struct buffer_head *bh_result, int create, int flag,
846 return __get_data_block(inode, iblock, bh_result, create,
850 static int get_data_block_dio(struct inode *inode, sector_t iblock,
851 struct buffer_head *bh_result, int create)
853 return __get_data_block(inode, iblock, bh_result, create,
854 F2FS_GET_BLOCK_DIO, NULL);
857 static int get_data_block_bmap(struct inode *inode, sector_t iblock,
858 struct buffer_head *bh_result, int create)
860 /* Block number less than F2FS MAX BLOCKS */
861 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
864 return __get_data_block(inode, iblock, bh_result, create,
865 F2FS_GET_BLOCK_BMAP, NULL);
868 static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
870 return (offset >> inode->i_blkbits);
873 static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
875 return (blk << inode->i_blkbits);
878 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
881 struct buffer_head map_bh;
882 sector_t start_blk, last_blk;
885 u64 logical = 0, phys = 0, size = 0;
889 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
893 if (f2fs_has_inline_data(inode)) {
894 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
901 isize = i_size_read(inode);
905 if (start + len > isize)
908 if (logical_to_blk(inode, len) == 0)
909 len = blk_to_logical(inode, 1);
911 start_blk = logical_to_blk(inode, start);
912 last_blk = logical_to_blk(inode, start + len - 1);
915 memset(&map_bh, 0, sizeof(struct buffer_head));
918 ret = get_data_block(inode, start_blk, &map_bh, 0,
919 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
924 if (!buffer_mapped(&map_bh)) {
925 start_blk = next_pgofs;
926 /* Go through holes util pass the EOF */
927 if (blk_to_logical(inode, start_blk) < isize)
929 /* Found a hole beyond isize means no more extents.
930 * Note that the premise is that filesystems don't
931 * punch holes beyond isize and keep size unchanged.
933 flags |= FIEMAP_EXTENT_LAST;
937 if (f2fs_encrypted_inode(inode))
938 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
940 ret = fiemap_fill_next_extent(fieinfo, logical,
944 if (start_blk > last_blk || ret)
947 logical = blk_to_logical(inode, start_blk);
948 phys = blk_to_logical(inode, map_bh.b_blocknr);
949 size = map_bh.b_size;
951 if (buffer_unwritten(&map_bh))
952 flags = FIEMAP_EXTENT_UNWRITTEN;
954 start_blk += logical_to_blk(inode, size);
958 if (fatal_signal_pending(current))
970 struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr,
973 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
974 struct fscrypt_ctx *ctx = NULL;
975 struct block_device *bdev = sbi->sb->s_bdev;
978 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) {
979 ctx = fscrypt_get_ctx(inode, GFP_NOFS);
981 return ERR_CAST(ctx);
983 /* wait the page to be moved by cleaning */
984 f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr);
987 bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES));
990 fscrypt_release_ctx(ctx);
991 return ERR_PTR(-ENOMEM);
994 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blkaddr);
995 bio->bi_end_io = f2fs_read_end_io;
996 bio->bi_private = ctx;
1002 * This function was originally taken from fs/mpage.c, and customized for f2fs.
1003 * Major change was from block_size == page_size in f2fs by default.
1005 static int f2fs_mpage_readpages(struct address_space *mapping,
1006 struct list_head *pages, struct page *page,
1009 struct bio *bio = NULL;
1011 sector_t last_block_in_bio = 0;
1012 struct inode *inode = mapping->host;
1013 const unsigned blkbits = inode->i_blkbits;
1014 const unsigned blocksize = 1 << blkbits;
1015 sector_t block_in_file;
1016 sector_t last_block;
1017 sector_t last_block_in_file;
1019 struct f2fs_map_blocks map;
1025 map.m_next_pgofs = NULL;
1027 for (page_idx = 0; nr_pages; page_idx++, nr_pages--) {
1029 prefetchw(&page->flags);
1031 page = list_entry(pages->prev, struct page, lru);
1032 list_del(&page->lru);
1033 if (add_to_page_cache_lru(page, mapping,
1035 readahead_gfp_mask(mapping)))
1039 block_in_file = (sector_t)page->index;
1040 last_block = block_in_file + nr_pages;
1041 last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
1043 if (last_block > last_block_in_file)
1044 last_block = last_block_in_file;
1047 * Map blocks using the previous result first.
1049 if ((map.m_flags & F2FS_MAP_MAPPED) &&
1050 block_in_file > map.m_lblk &&
1051 block_in_file < (map.m_lblk + map.m_len))
1055 * Then do more f2fs_map_blocks() calls until we are
1056 * done with this page.
1060 if (block_in_file < last_block) {
1061 map.m_lblk = block_in_file;
1062 map.m_len = last_block - block_in_file;
1064 if (f2fs_map_blocks(inode, &map, 0,
1065 F2FS_GET_BLOCK_READ))
1066 goto set_error_page;
1069 if ((map.m_flags & F2FS_MAP_MAPPED)) {
1070 block_nr = map.m_pblk + block_in_file - map.m_lblk;
1071 SetPageMappedToDisk(page);
1073 if (!PageUptodate(page) && !cleancache_get_page(page)) {
1074 SetPageUptodate(page);
1078 zero_user_segment(page, 0, PAGE_SIZE);
1079 if (!PageUptodate(page))
1080 SetPageUptodate(page);
1086 * This page will go to BIO. Do we need to send this
1089 if (bio && (last_block_in_bio != block_nr - 1)) {
1091 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1095 bio = f2fs_grab_bio(inode, block_nr, nr_pages);
1098 goto set_error_page;
1100 bio_set_op_attrs(bio, REQ_OP_READ, 0);
1103 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
1104 goto submit_and_realloc;
1106 last_block_in_bio = block_nr;
1110 zero_user_segment(page, 0, PAGE_SIZE);
1115 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1123 BUG_ON(pages && !list_empty(pages));
1125 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1129 static int f2fs_read_data_page(struct file *file, struct page *page)
1131 struct inode *inode = page->mapping->host;
1134 trace_f2fs_readpage(page, DATA);
1136 /* If the file has inline data, try to read it directly */
1137 if (f2fs_has_inline_data(inode))
1138 ret = f2fs_read_inline_data(inode, page);
1140 ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1);
1144 static int f2fs_read_data_pages(struct file *file,
1145 struct address_space *mapping,
1146 struct list_head *pages, unsigned nr_pages)
1148 struct inode *inode = file->f_mapping->host;
1149 struct page *page = list_entry(pages->prev, struct page, lru);
1151 trace_f2fs_readpages(inode, page, nr_pages);
1153 /* If the file has inline data, skip readpages */
1154 if (f2fs_has_inline_data(inode))
1157 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages);
1160 int do_write_data_page(struct f2fs_io_info *fio)
1162 struct page *page = fio->page;
1163 struct inode *inode = page->mapping->host;
1164 struct dnode_of_data dn;
1167 set_new_dnode(&dn, inode, NULL, NULL, 0);
1168 err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
1172 fio->old_blkaddr = dn.data_blkaddr;
1174 /* This page is already truncated */
1175 if (fio->old_blkaddr == NULL_ADDR) {
1176 ClearPageUptodate(page);
1180 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) {
1181 gfp_t gfp_flags = GFP_NOFS;
1183 /* wait for GCed encrypted page writeback */
1184 f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode),
1187 fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page,
1189 if (IS_ERR(fio->encrypted_page)) {
1190 err = PTR_ERR(fio->encrypted_page);
1191 if (err == -ENOMEM) {
1192 /* flush pending ios and wait for a while */
1193 f2fs_flush_merged_bios(F2FS_I_SB(inode));
1194 congestion_wait(BLK_RW_ASYNC, HZ/50);
1195 gfp_flags |= __GFP_NOFAIL;
1203 set_page_writeback(page);
1206 * If current allocation needs SSR,
1207 * it had better in-place writes for updated data.
1209 if (unlikely(fio->old_blkaddr != NEW_ADDR &&
1210 !is_cold_data(page) &&
1211 !IS_ATOMIC_WRITTEN_PAGE(page) &&
1212 need_inplace_update(inode))) {
1213 rewrite_data_page(fio);
1214 set_inode_flag(inode, FI_UPDATE_WRITE);
1215 trace_f2fs_do_write_data_page(page, IPU);
1217 write_data_page(&dn, fio);
1218 trace_f2fs_do_write_data_page(page, OPU);
1219 set_inode_flag(inode, FI_APPEND_WRITE);
1220 if (page->index == 0)
1221 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
1224 f2fs_put_dnode(&dn);
1228 static int f2fs_write_data_page(struct page *page,
1229 struct writeback_control *wbc)
1231 struct inode *inode = page->mapping->host;
1232 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1233 loff_t i_size = i_size_read(inode);
1234 const pgoff_t end_index = ((unsigned long long) i_size)
1236 loff_t psize = (page->index + 1) << PAGE_SHIFT;
1237 unsigned offset = 0;
1238 bool need_balance_fs = false;
1240 struct f2fs_io_info fio = {
1244 .op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0,
1246 .encrypted_page = NULL,
1249 trace_f2fs_writepage(page, DATA);
1251 if (page->index < end_index)
1255 * If the offset is out-of-range of file size,
1256 * this page does not have to be written to disk.
1258 offset = i_size & (PAGE_SIZE - 1);
1259 if ((page->index >= end_index + 1) || !offset)
1262 zero_user_segment(page, offset, PAGE_SIZE);
1264 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1266 if (f2fs_is_drop_cache(inode))
1268 /* we should not write 0'th page having journal header */
1269 if (f2fs_is_volatile_file(inode) && (!page->index ||
1270 (!wbc->for_reclaim &&
1271 available_free_memory(sbi, BASE_CHECK))))
1274 /* we should bypass data pages to proceed the kworkder jobs */
1275 if (unlikely(f2fs_cp_error(sbi))) {
1276 mapping_set_error(page->mapping, -EIO);
1280 /* Dentry blocks are controlled by checkpoint */
1281 if (S_ISDIR(inode->i_mode)) {
1282 err = do_write_data_page(&fio);
1286 if (!wbc->for_reclaim)
1287 need_balance_fs = true;
1288 else if (has_not_enough_free_secs(sbi, 0))
1293 if (f2fs_has_inline_data(inode))
1294 err = f2fs_write_inline_data(inode, page);
1296 err = do_write_data_page(&fio);
1297 if (F2FS_I(inode)->last_disk_size < psize)
1298 F2FS_I(inode)->last_disk_size = psize;
1299 f2fs_unlock_op(sbi);
1301 if (err && err != -ENOENT)
1304 clear_cold_data(page);
1306 inode_dec_dirty_pages(inode);
1308 ClearPageUptodate(page);
1310 if (wbc->for_reclaim) {
1311 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE);
1312 remove_dirty_inode(inode);
1316 f2fs_balance_fs(sbi, need_balance_fs);
1318 if (unlikely(f2fs_cp_error(sbi)))
1319 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1324 redirty_page_for_writepage(wbc, page);
1330 * This function was copied from write_cche_pages from mm/page-writeback.c.
1331 * The major change is making write step of cold data page separately from
1332 * warm/hot data page.
1334 static int f2fs_write_cache_pages(struct address_space *mapping,
1335 struct writeback_control *wbc)
1339 struct pagevec pvec;
1341 pgoff_t uninitialized_var(writeback_index);
1343 pgoff_t end; /* Inclusive */
1346 int range_whole = 0;
1349 pagevec_init(&pvec, 0);
1351 if (wbc->range_cyclic) {
1352 writeback_index = mapping->writeback_index; /* prev offset */
1353 index = writeback_index;
1360 index = wbc->range_start >> PAGE_SHIFT;
1361 end = wbc->range_end >> PAGE_SHIFT;
1362 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
1364 cycled = 1; /* ignore range_cyclic tests */
1366 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
1367 tag = PAGECACHE_TAG_TOWRITE;
1369 tag = PAGECACHE_TAG_DIRTY;
1371 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
1372 tag_pages_for_writeback(mapping, index, end);
1374 while (!done && (index <= end)) {
1377 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag,
1378 min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1);
1382 for (i = 0; i < nr_pages; i++) {
1383 struct page *page = pvec.pages[i];
1385 if (page->index > end) {
1390 done_index = page->index;
1394 if (unlikely(page->mapping != mapping)) {
1400 if (!PageDirty(page)) {
1401 /* someone wrote it for us */
1402 goto continue_unlock;
1405 if (PageWriteback(page)) {
1406 if (wbc->sync_mode != WB_SYNC_NONE)
1407 f2fs_wait_on_page_writeback(page,
1410 goto continue_unlock;
1413 BUG_ON(PageWriteback(page));
1414 if (!clear_page_dirty_for_io(page))
1415 goto continue_unlock;
1417 ret = mapping->a_ops->writepage(page, wbc);
1418 if (unlikely(ret)) {
1419 done_index = page->index + 1;
1424 if (--wbc->nr_to_write <= 0 &&
1425 wbc->sync_mode == WB_SYNC_NONE) {
1430 pagevec_release(&pvec);
1434 if (!cycled && !done) {
1437 end = writeback_index - 1;
1440 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
1441 mapping->writeback_index = done_index;
1446 static int f2fs_write_data_pages(struct address_space *mapping,
1447 struct writeback_control *wbc)
1449 struct inode *inode = mapping->host;
1450 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1451 struct blk_plug plug;
1454 /* deal with chardevs and other special file */
1455 if (!mapping->a_ops->writepage)
1458 /* skip writing if there is no dirty page in this inode */
1459 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
1462 if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE &&
1463 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
1464 available_free_memory(sbi, DIRTY_DENTS))
1467 /* skip writing during file defragment */
1468 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
1471 /* during POR, we don't need to trigger writepage at all. */
1472 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1475 trace_f2fs_writepages(mapping->host, wbc, DATA);
1477 blk_start_plug(&plug);
1478 ret = f2fs_write_cache_pages(mapping, wbc);
1479 blk_finish_plug(&plug);
1481 * if some pages were truncated, we cannot guarantee its mapping->host
1482 * to detect pending bios.
1484 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1486 remove_dirty_inode(inode);
1490 wbc->pages_skipped += get_dirty_pages(inode);
1491 trace_f2fs_writepages(mapping->host, wbc, DATA);
1495 static void f2fs_write_failed(struct address_space *mapping, loff_t to)
1497 struct inode *inode = mapping->host;
1498 loff_t i_size = i_size_read(inode);
1501 truncate_pagecache(inode, i_size);
1502 truncate_blocks(inode, i_size, true);
1506 static int prepare_write_begin(struct f2fs_sb_info *sbi,
1507 struct page *page, loff_t pos, unsigned len,
1508 block_t *blk_addr, bool *node_changed)
1510 struct inode *inode = page->mapping->host;
1511 pgoff_t index = page->index;
1512 struct dnode_of_data dn;
1514 bool locked = false;
1515 struct extent_info ei;
1519 * we already allocated all the blocks, so we don't need to get
1520 * the block addresses when there is no need to fill the page.
1522 if (!f2fs_has_inline_data(inode) && !f2fs_encrypted_inode(inode) &&
1526 if (f2fs_has_inline_data(inode) ||
1527 (pos & PAGE_MASK) >= i_size_read(inode)) {
1532 /* check inline_data */
1533 ipage = get_node_page(sbi, inode->i_ino);
1534 if (IS_ERR(ipage)) {
1535 err = PTR_ERR(ipage);
1539 set_new_dnode(&dn, inode, ipage, ipage, 0);
1541 if (f2fs_has_inline_data(inode)) {
1542 if (pos + len <= MAX_INLINE_DATA) {
1543 read_inline_data(page, ipage);
1544 set_inode_flag(inode, FI_DATA_EXIST);
1546 set_inline_node(ipage);
1548 err = f2fs_convert_inline_page(&dn, page);
1551 if (dn.data_blkaddr == NULL_ADDR)
1552 err = f2fs_get_block(&dn, index);
1554 } else if (locked) {
1555 err = f2fs_get_block(&dn, index);
1557 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1558 dn.data_blkaddr = ei.blk + index - ei.fofs;
1561 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
1562 if (err || dn.data_blkaddr == NULL_ADDR) {
1563 f2fs_put_dnode(&dn);
1571 /* convert_inline_page can make node_changed */
1572 *blk_addr = dn.data_blkaddr;
1573 *node_changed = dn.node_changed;
1575 f2fs_put_dnode(&dn);
1578 f2fs_unlock_op(sbi);
1582 static int f2fs_write_begin(struct file *file, struct address_space *mapping,
1583 loff_t pos, unsigned len, unsigned flags,
1584 struct page **pagep, void **fsdata)
1586 struct inode *inode = mapping->host;
1587 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1588 struct page *page = NULL;
1589 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
1590 bool need_balance = false;
1591 block_t blkaddr = NULL_ADDR;
1594 trace_f2fs_write_begin(inode, pos, len, flags);
1597 * We should check this at this moment to avoid deadlock on inode page
1598 * and #0 page. The locking rule for inline_data conversion should be:
1599 * lock_page(page #0) -> lock_page(inode_page)
1602 err = f2fs_convert_inline_inode(inode);
1607 page = grab_cache_page_write_begin(mapping, index, flags);
1615 err = prepare_write_begin(sbi, page, pos, len,
1616 &blkaddr, &need_balance);
1620 if (need_balance && has_not_enough_free_secs(sbi, 0)) {
1622 f2fs_balance_fs(sbi, true);
1624 if (page->mapping != mapping) {
1625 /* The page got truncated from under us */
1626 f2fs_put_page(page, 1);
1631 f2fs_wait_on_page_writeback(page, DATA, false);
1633 /* wait for GCed encrypted page writeback */
1634 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
1635 f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr);
1637 if (len == PAGE_SIZE)
1639 if (PageUptodate(page))
1642 if ((pos & PAGE_MASK) >= i_size_read(inode)) {
1643 unsigned start = pos & (PAGE_SIZE - 1);
1644 unsigned end = start + len;
1646 /* Reading beyond i_size is simple: memset to zero */
1647 zero_user_segments(page, 0, start, end, PAGE_SIZE);
1651 if (blkaddr == NEW_ADDR) {
1652 zero_user_segment(page, 0, PAGE_SIZE);
1656 bio = f2fs_grab_bio(inode, blkaddr, 1);
1661 bio_set_op_attrs(bio, REQ_OP_READ, READ_SYNC);
1662 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1668 __submit_bio(sbi, bio, DATA);
1671 if (unlikely(page->mapping != mapping)) {
1672 f2fs_put_page(page, 1);
1675 if (unlikely(!PageUptodate(page))) {
1681 if (!PageUptodate(page))
1682 SetPageUptodate(page);
1684 clear_cold_data(page);
1688 f2fs_put_page(page, 1);
1689 f2fs_write_failed(mapping, pos + len);
1693 static int f2fs_write_end(struct file *file,
1694 struct address_space *mapping,
1695 loff_t pos, unsigned len, unsigned copied,
1696 struct page *page, void *fsdata)
1698 struct inode *inode = page->mapping->host;
1700 trace_f2fs_write_end(inode, pos, len, copied);
1702 set_page_dirty(page);
1703 f2fs_put_page(page, 1);
1705 if (pos + copied > i_size_read(inode))
1706 f2fs_i_size_write(inode, pos + copied);
1708 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1712 static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
1715 unsigned blocksize_mask = inode->i_sb->s_blocksize - 1;
1717 if (offset & blocksize_mask)
1720 if (iov_iter_alignment(iter) & blocksize_mask)
1726 static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
1728 struct address_space *mapping = iocb->ki_filp->f_mapping;
1729 struct inode *inode = mapping->host;
1730 size_t count = iov_iter_count(iter);
1731 loff_t offset = iocb->ki_pos;
1732 int rw = iov_iter_rw(iter);
1735 err = check_direct_IO(inode, iter, offset);
1739 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
1741 if (test_opt(F2FS_I_SB(inode), LFS))
1744 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
1746 down_read(&F2FS_I(inode)->dio_rwsem[rw]);
1747 err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio);
1748 up_read(&F2FS_I(inode)->dio_rwsem[rw]);
1752 set_inode_flag(inode, FI_UPDATE_WRITE);
1754 f2fs_write_failed(mapping, offset + count);
1757 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
1762 void f2fs_invalidate_page(struct page *page, unsigned int offset,
1763 unsigned int length)
1765 struct inode *inode = page->mapping->host;
1766 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1768 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
1769 (offset % PAGE_SIZE || length != PAGE_SIZE))
1772 if (PageDirty(page)) {
1773 if (inode->i_ino == F2FS_META_INO(sbi))
1774 dec_page_count(sbi, F2FS_DIRTY_META);
1775 else if (inode->i_ino == F2FS_NODE_INO(sbi))
1776 dec_page_count(sbi, F2FS_DIRTY_NODES);
1778 inode_dec_dirty_pages(inode);
1781 /* This is atomic written page, keep Private */
1782 if (IS_ATOMIC_WRITTEN_PAGE(page))
1785 set_page_private(page, 0);
1786 ClearPagePrivate(page);
1789 int f2fs_release_page(struct page *page, gfp_t wait)
1791 /* If this is dirty page, keep PagePrivate */
1792 if (PageDirty(page))
1795 /* This is atomic written page, keep Private */
1796 if (IS_ATOMIC_WRITTEN_PAGE(page))
1799 set_page_private(page, 0);
1800 ClearPagePrivate(page);
1805 * This was copied from __set_page_dirty_buffers which gives higher performance
1806 * in very high speed storages. (e.g., pmem)
1808 void f2fs_set_page_dirty_nobuffers(struct page *page)
1810 struct address_space *mapping = page->mapping;
1811 unsigned long flags;
1813 if (unlikely(!mapping))
1816 spin_lock(&mapping->private_lock);
1817 lock_page_memcg(page);
1819 spin_unlock(&mapping->private_lock);
1821 spin_lock_irqsave(&mapping->tree_lock, flags);
1822 WARN_ON_ONCE(!PageUptodate(page));
1823 account_page_dirtied(page, mapping);
1824 radix_tree_tag_set(&mapping->page_tree,
1825 page_index(page), PAGECACHE_TAG_DIRTY);
1826 spin_unlock_irqrestore(&mapping->tree_lock, flags);
1827 unlock_page_memcg(page);
1829 __mark_inode_dirty(mapping->host, I_DIRTY_PAGES);
1833 static int f2fs_set_data_page_dirty(struct page *page)
1835 struct address_space *mapping = page->mapping;
1836 struct inode *inode = mapping->host;
1838 trace_f2fs_set_page_dirty(page, DATA);
1840 if (!PageUptodate(page))
1841 SetPageUptodate(page);
1843 if (f2fs_is_atomic_file(inode)) {
1844 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
1845 register_inmem_page(inode, page);
1849 * Previously, this page has been registered, we just
1855 if (!PageDirty(page)) {
1856 f2fs_set_page_dirty_nobuffers(page);
1857 update_dirty_page(inode, page);
1863 static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
1865 struct inode *inode = mapping->host;
1867 if (f2fs_has_inline_data(inode))
1870 /* make sure allocating whole blocks */
1871 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
1872 filemap_write_and_wait(mapping);
1874 return generic_block_bmap(mapping, block, get_data_block_bmap);
1877 const struct address_space_operations f2fs_dblock_aops = {
1878 .readpage = f2fs_read_data_page,
1879 .readpages = f2fs_read_data_pages,
1880 .writepage = f2fs_write_data_page,
1881 .writepages = f2fs_write_data_pages,
1882 .write_begin = f2fs_write_begin,
1883 .write_end = f2fs_write_end,
1884 .set_page_dirty = f2fs_set_data_page_dirty,
1885 .invalidatepage = f2fs_invalidate_page,
1886 .releasepage = f2fs_release_page,
1887 .direct_IO = f2fs_direct_IO,