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 #ifdef CONFIG_F2FS_FAULT_INJECTION
38 if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO))
42 if (f2fs_bio_encrypted(bio)) {
44 fscrypt_release_ctx(bio->bi_private);
46 fscrypt_decrypt_bio_pages(bio->bi_private, bio);
51 bio_for_each_segment_all(bvec, bio, i) {
52 struct page *page = bvec->bv_page;
55 if (!PageUptodate(page))
56 SetPageUptodate(page);
58 ClearPageUptodate(page);
66 static void f2fs_write_end_io(struct bio *bio)
68 struct f2fs_sb_info *sbi = bio->bi_private;
72 bio_for_each_segment_all(bvec, bio, i) {
73 struct page *page = bvec->bv_page;
75 fscrypt_pullback_bio_page(&page, true);
77 if (unlikely(bio->bi_error)) {
78 mapping_set_error(page->mapping, -EIO);
79 f2fs_stop_checkpoint(sbi, true);
81 end_page_writeback(page);
83 if (atomic_dec_and_test(&sbi->nr_wb_bios) &&
84 wq_has_sleeper(&sbi->cp_wait))
85 wake_up(&sbi->cp_wait);
91 * Low-level block read/write IO operations.
93 static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr,
94 int npages, bool is_read)
98 bio = f2fs_bio_alloc(npages);
100 bio->bi_bdev = sbi->sb->s_bdev;
101 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
102 bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io;
103 bio->bi_private = is_read ? NULL : sbi;
108 static inline void __submit_bio(struct f2fs_sb_info *sbi,
109 struct bio *bio, enum page_type type)
111 if (!is_read_io(bio_op(bio))) {
112 atomic_inc(&sbi->nr_wb_bios);
113 if (f2fs_sb_mounted_blkzoned(sbi->sb) &&
114 current->plug && (type == DATA || type == NODE))
115 blk_finish_plug(current->plug);
120 static void __submit_merged_bio(struct f2fs_bio_info *io)
122 struct f2fs_io_info *fio = &io->fio;
127 if (is_read_io(fio->op))
128 trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio);
130 trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio);
132 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
134 __submit_bio(io->sbi, io->bio, fio->type);
138 static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
139 struct page *page, nid_t ino)
141 struct bio_vec *bvec;
148 if (!inode && !page && !ino)
151 bio_for_each_segment_all(bvec, io->bio, i) {
153 if (bvec->bv_page->mapping)
154 target = bvec->bv_page;
156 target = fscrypt_control_page(bvec->bv_page);
158 if (inode && inode == target->mapping->host)
160 if (page && page == target)
162 if (ino && ino == ino_of_node(target))
169 static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode,
170 struct page *page, nid_t ino,
173 enum page_type btype = PAGE_TYPE_OF_BIO(type);
174 struct f2fs_bio_info *io = &sbi->write_io[btype];
177 down_read(&io->io_rwsem);
178 ret = __has_merged_page(io, inode, page, ino);
179 up_read(&io->io_rwsem);
183 static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi,
184 struct inode *inode, struct page *page,
185 nid_t ino, enum page_type type, int rw)
187 enum page_type btype = PAGE_TYPE_OF_BIO(type);
188 struct f2fs_bio_info *io;
190 io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype];
192 down_write(&io->io_rwsem);
194 if (!__has_merged_page(io, inode, page, ino))
197 /* change META to META_FLUSH in the checkpoint procedure */
198 if (type >= META_FLUSH) {
199 io->fio.type = META_FLUSH;
200 io->fio.op = REQ_OP_WRITE;
201 if (test_opt(sbi, NOBARRIER))
202 io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO;
204 io->fio.op_flags = WRITE_FLUSH_FUA | REQ_META |
207 __submit_merged_bio(io);
209 up_write(&io->io_rwsem);
212 void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type,
215 __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw);
218 void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi,
219 struct inode *inode, struct page *page,
220 nid_t ino, enum page_type type, int rw)
222 if (has_merged_page(sbi, inode, page, ino, type))
223 __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw);
226 void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi)
228 f2fs_submit_merged_bio(sbi, DATA, WRITE);
229 f2fs_submit_merged_bio(sbi, NODE, WRITE);
230 f2fs_submit_merged_bio(sbi, META, WRITE);
234 * Fill the locked page with data located in the block address.
235 * Return unlocked page.
237 int f2fs_submit_page_bio(struct f2fs_io_info *fio)
240 struct page *page = fio->encrypted_page ?
241 fio->encrypted_page : fio->page;
243 trace_f2fs_submit_page_bio(page, fio);
244 f2fs_trace_ios(fio, 0);
246 /* Allocate a new bio */
247 bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op));
249 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
253 bio_set_op_attrs(bio, fio->op, fio->op_flags);
255 __submit_bio(fio->sbi, bio, fio->type);
259 void f2fs_submit_page_mbio(struct f2fs_io_info *fio)
261 struct f2fs_sb_info *sbi = fio->sbi;
262 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
263 struct f2fs_bio_info *io;
264 bool is_read = is_read_io(fio->op);
265 struct page *bio_page;
267 io = is_read ? &sbi->read_io : &sbi->write_io[btype];
269 if (fio->old_blkaddr != NEW_ADDR)
270 verify_block_addr(sbi, fio->old_blkaddr);
271 verify_block_addr(sbi, fio->new_blkaddr);
273 down_write(&io->io_rwsem);
275 if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 ||
276 (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags)))
277 __submit_merged_bio(io);
279 if (io->bio == NULL) {
280 io->bio = __bio_alloc(sbi, fio->new_blkaddr,
281 BIO_MAX_PAGES, is_read);
285 bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
287 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) <
289 __submit_merged_bio(io);
293 io->last_block_in_bio = fio->new_blkaddr;
294 f2fs_trace_ios(fio, 0);
296 up_write(&io->io_rwsem);
297 trace_f2fs_submit_page_mbio(fio->page, fio);
300 static void __set_data_blkaddr(struct dnode_of_data *dn)
302 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
305 /* Get physical address of data block */
306 addr_array = blkaddr_in_node(rn);
307 addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
311 * Lock ordering for the change of data block address:
314 * update block addresses in the node page
316 void set_data_blkaddr(struct dnode_of_data *dn)
318 f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
319 __set_data_blkaddr(dn);
320 if (set_page_dirty(dn->node_page))
321 dn->node_changed = true;
324 void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
326 dn->data_blkaddr = blkaddr;
327 set_data_blkaddr(dn);
328 f2fs_update_extent_cache(dn);
331 /* dn->ofs_in_node will be returned with up-to-date last block pointer */
332 int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
334 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
339 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
341 if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
344 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
345 dn->ofs_in_node, count);
347 f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
349 for (; count > 0; dn->ofs_in_node++) {
351 datablock_addr(dn->node_page, dn->ofs_in_node);
352 if (blkaddr == NULL_ADDR) {
353 dn->data_blkaddr = NEW_ADDR;
354 __set_data_blkaddr(dn);
359 if (set_page_dirty(dn->node_page))
360 dn->node_changed = true;
364 /* Should keep dn->ofs_in_node unchanged */
365 int reserve_new_block(struct dnode_of_data *dn)
367 unsigned int ofs_in_node = dn->ofs_in_node;
370 ret = reserve_new_blocks(dn, 1);
371 dn->ofs_in_node = ofs_in_node;
375 int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
377 bool need_put = dn->inode_page ? false : true;
380 err = get_dnode_of_data(dn, index, ALLOC_NODE);
384 if (dn->data_blkaddr == NULL_ADDR)
385 err = reserve_new_block(dn);
391 int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
393 struct extent_info ei;
394 struct inode *inode = dn->inode;
396 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
397 dn->data_blkaddr = ei.blk + index - ei.fofs;
401 return f2fs_reserve_block(dn, index);
404 struct page *get_read_data_page(struct inode *inode, pgoff_t index,
405 int op_flags, bool for_write)
407 struct address_space *mapping = inode->i_mapping;
408 struct dnode_of_data dn;
410 struct extent_info ei;
412 struct f2fs_io_info fio = {
413 .sbi = F2FS_I_SB(inode),
416 .op_flags = op_flags,
417 .encrypted_page = NULL,
420 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
421 return read_mapping_page(mapping, index, NULL);
423 page = f2fs_grab_cache_page(mapping, index, for_write);
425 return ERR_PTR(-ENOMEM);
427 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
428 dn.data_blkaddr = ei.blk + index - ei.fofs;
432 set_new_dnode(&dn, inode, NULL, NULL, 0);
433 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
438 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
443 if (PageUptodate(page)) {
449 * A new dentry page is allocated but not able to be written, since its
450 * new inode page couldn't be allocated due to -ENOSPC.
451 * In such the case, its blkaddr can be remained as NEW_ADDR.
452 * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata.
454 if (dn.data_blkaddr == NEW_ADDR) {
455 zero_user_segment(page, 0, PAGE_SIZE);
456 if (!PageUptodate(page))
457 SetPageUptodate(page);
462 fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr;
464 err = f2fs_submit_page_bio(&fio);
470 f2fs_put_page(page, 1);
474 struct page *find_data_page(struct inode *inode, pgoff_t index)
476 struct address_space *mapping = inode->i_mapping;
479 page = find_get_page(mapping, index);
480 if (page && PageUptodate(page))
482 f2fs_put_page(page, 0);
484 page = get_read_data_page(inode, index, READ_SYNC, false);
488 if (PageUptodate(page))
491 wait_on_page_locked(page);
492 if (unlikely(!PageUptodate(page))) {
493 f2fs_put_page(page, 0);
494 return ERR_PTR(-EIO);
500 * If it tries to access a hole, return an error.
501 * Because, the callers, functions in dir.c and GC, should be able to know
502 * whether this page exists or not.
504 struct page *get_lock_data_page(struct inode *inode, pgoff_t index,
507 struct address_space *mapping = inode->i_mapping;
510 page = get_read_data_page(inode, index, READ_SYNC, for_write);
514 /* wait for read completion */
516 if (unlikely(page->mapping != mapping)) {
517 f2fs_put_page(page, 1);
520 if (unlikely(!PageUptodate(page))) {
521 f2fs_put_page(page, 1);
522 return ERR_PTR(-EIO);
528 * Caller ensures that this data page is never allocated.
529 * A new zero-filled data page is allocated in the page cache.
531 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
533 * Note that, ipage is set only by make_empty_dir, and if any error occur,
534 * ipage should be released by this function.
536 struct page *get_new_data_page(struct inode *inode,
537 struct page *ipage, pgoff_t index, bool new_i_size)
539 struct address_space *mapping = inode->i_mapping;
541 struct dnode_of_data dn;
544 page = f2fs_grab_cache_page(mapping, index, true);
547 * before exiting, we should make sure ipage will be released
548 * if any error occur.
550 f2fs_put_page(ipage, 1);
551 return ERR_PTR(-ENOMEM);
554 set_new_dnode(&dn, inode, ipage, NULL, 0);
555 err = f2fs_reserve_block(&dn, index);
557 f2fs_put_page(page, 1);
563 if (PageUptodate(page))
566 if (dn.data_blkaddr == NEW_ADDR) {
567 zero_user_segment(page, 0, PAGE_SIZE);
568 if (!PageUptodate(page))
569 SetPageUptodate(page);
571 f2fs_put_page(page, 1);
573 /* if ipage exists, blkaddr should be NEW_ADDR */
574 f2fs_bug_on(F2FS_I_SB(inode), ipage);
575 page = get_lock_data_page(inode, index, true);
580 if (new_i_size && i_size_read(inode) <
581 ((loff_t)(index + 1) << PAGE_SHIFT))
582 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
586 static int __allocate_data_block(struct dnode_of_data *dn)
588 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
589 struct f2fs_summary sum;
591 int seg = CURSEG_WARM_DATA;
595 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
598 dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node);
599 if (dn->data_blkaddr == NEW_ADDR)
602 if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count)))
606 get_node_info(sbi, dn->nid, &ni);
607 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
609 if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page)
610 seg = CURSEG_DIRECT_IO;
612 allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr,
614 set_data_blkaddr(dn);
617 fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) +
619 if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT))
620 f2fs_i_size_write(dn->inode,
621 ((loff_t)(fofs + 1) << PAGE_SHIFT));
625 ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
627 struct inode *inode = file_inode(iocb->ki_filp);
628 struct f2fs_map_blocks map;
631 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
632 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
633 if (map.m_len > map.m_lblk)
634 map.m_len -= map.m_lblk;
638 map.m_next_pgofs = NULL;
640 if (iocb->ki_flags & IOCB_DIRECT) {
641 ret = f2fs_convert_inline_inode(inode);
644 return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO);
646 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) {
647 ret = f2fs_convert_inline_inode(inode);
651 if (!f2fs_has_inline_data(inode))
652 return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
657 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
658 * f2fs_map_blocks structure.
659 * If original data blocks are allocated, then give them to blockdev.
661 * a. preallocate requested block addresses
662 * b. do not use extent cache for better performance
663 * c. give the block addresses to blockdev
665 int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
666 int create, int flag)
668 unsigned int maxblocks = map->m_len;
669 struct dnode_of_data dn;
670 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
671 int mode = create ? ALLOC_NODE : LOOKUP_NODE;
672 pgoff_t pgofs, end_offset, end;
673 int err = 0, ofs = 1;
674 unsigned int ofs_in_node, last_ofs_in_node;
676 struct extent_info ei;
685 /* it only supports block size == page size */
686 pgofs = (pgoff_t)map->m_lblk;
687 end = pgofs + maxblocks;
689 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
690 map->m_pblk = ei.blk + pgofs - ei.fofs;
691 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
692 map->m_flags = F2FS_MAP_MAPPED;
700 /* When reading holes, we need its node page */
701 set_new_dnode(&dn, inode, NULL, NULL, 0);
702 err = get_dnode_of_data(&dn, pgofs, mode);
704 if (flag == F2FS_GET_BLOCK_BMAP)
706 if (err == -ENOENT) {
708 if (map->m_next_pgofs)
710 get_next_page_offset(&dn, pgofs);
716 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
717 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
720 blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
722 if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) {
724 if (unlikely(f2fs_cp_error(sbi))) {
728 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
729 if (blkaddr == NULL_ADDR) {
731 last_ofs_in_node = dn.ofs_in_node;
734 err = __allocate_data_block(&dn);
736 set_inode_flag(inode, FI_APPEND_WRITE);
740 map->m_flags = F2FS_MAP_NEW;
741 blkaddr = dn.data_blkaddr;
743 if (flag == F2FS_GET_BLOCK_BMAP) {
747 if (flag == F2FS_GET_BLOCK_FIEMAP &&
748 blkaddr == NULL_ADDR) {
749 if (map->m_next_pgofs)
750 *map->m_next_pgofs = pgofs + 1;
752 if (flag != F2FS_GET_BLOCK_FIEMAP ||
758 if (flag == F2FS_GET_BLOCK_PRE_AIO)
761 if (map->m_len == 0) {
762 /* preallocated unwritten block should be mapped for fiemap. */
763 if (blkaddr == NEW_ADDR)
764 map->m_flags |= F2FS_MAP_UNWRITTEN;
765 map->m_flags |= F2FS_MAP_MAPPED;
767 map->m_pblk = blkaddr;
769 } else if ((map->m_pblk != NEW_ADDR &&
770 blkaddr == (map->m_pblk + ofs)) ||
771 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
772 flag == F2FS_GET_BLOCK_PRE_DIO) {
783 /* preallocate blocks in batch for one dnode page */
784 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
785 (pgofs == end || dn.ofs_in_node == end_offset)) {
787 dn.ofs_in_node = ofs_in_node;
788 err = reserve_new_blocks(&dn, prealloc);
792 map->m_len += dn.ofs_in_node - ofs_in_node;
793 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
797 dn.ofs_in_node = end_offset;
802 else if (dn.ofs_in_node < end_offset)
809 f2fs_balance_fs(sbi, dn.node_changed);
818 f2fs_balance_fs(sbi, dn.node_changed);
821 trace_f2fs_map_blocks(inode, map, err);
825 static int __get_data_block(struct inode *inode, sector_t iblock,
826 struct buffer_head *bh, int create, int flag,
829 struct f2fs_map_blocks map;
833 map.m_len = bh->b_size >> inode->i_blkbits;
834 map.m_next_pgofs = next_pgofs;
836 ret = f2fs_map_blocks(inode, &map, create, flag);
838 map_bh(bh, inode->i_sb, map.m_pblk);
839 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
840 bh->b_size = map.m_len << inode->i_blkbits;
845 static int get_data_block(struct inode *inode, sector_t iblock,
846 struct buffer_head *bh_result, int create, int flag,
849 return __get_data_block(inode, iblock, bh_result, create,
853 static int get_data_block_dio(struct inode *inode, sector_t iblock,
854 struct buffer_head *bh_result, int create)
856 return __get_data_block(inode, iblock, bh_result, create,
857 F2FS_GET_BLOCK_DIO, NULL);
860 static int get_data_block_bmap(struct inode *inode, sector_t iblock,
861 struct buffer_head *bh_result, int create)
863 /* Block number less than F2FS MAX BLOCKS */
864 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
867 return __get_data_block(inode, iblock, bh_result, create,
868 F2FS_GET_BLOCK_BMAP, NULL);
871 static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
873 return (offset >> inode->i_blkbits);
876 static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
878 return (blk << inode->i_blkbits);
881 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
884 struct buffer_head map_bh;
885 sector_t start_blk, last_blk;
887 u64 logical = 0, phys = 0, size = 0;
891 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC);
895 if (f2fs_has_inline_data(inode)) {
896 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
903 if (logical_to_blk(inode, len) == 0)
904 len = blk_to_logical(inode, 1);
906 start_blk = logical_to_blk(inode, start);
907 last_blk = logical_to_blk(inode, start + len - 1);
910 memset(&map_bh, 0, sizeof(struct buffer_head));
913 ret = get_data_block(inode, start_blk, &map_bh, 0,
914 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
919 if (!buffer_mapped(&map_bh)) {
920 start_blk = next_pgofs;
922 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
923 F2FS_I_SB(inode)->max_file_blocks))
926 flags |= FIEMAP_EXTENT_LAST;
930 if (f2fs_encrypted_inode(inode))
931 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
933 ret = fiemap_fill_next_extent(fieinfo, logical,
937 if (start_blk > last_blk || ret)
940 logical = blk_to_logical(inode, start_blk);
941 phys = blk_to_logical(inode, map_bh.b_blocknr);
942 size = map_bh.b_size;
944 if (buffer_unwritten(&map_bh))
945 flags = FIEMAP_EXTENT_UNWRITTEN;
947 start_blk += logical_to_blk(inode, size);
951 if (fatal_signal_pending(current))
963 static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr,
966 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
967 struct fscrypt_ctx *ctx = NULL;
968 struct block_device *bdev = sbi->sb->s_bdev;
971 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) {
972 ctx = fscrypt_get_ctx(inode, GFP_NOFS);
974 return ERR_CAST(ctx);
976 /* wait the page to be moved by cleaning */
977 f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr);
980 bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES));
983 fscrypt_release_ctx(ctx);
984 return ERR_PTR(-ENOMEM);
987 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blkaddr);
988 bio->bi_end_io = f2fs_read_end_io;
989 bio->bi_private = ctx;
995 * This function was originally taken from fs/mpage.c, and customized for f2fs.
996 * Major change was from block_size == page_size in f2fs by default.
998 static int f2fs_mpage_readpages(struct address_space *mapping,
999 struct list_head *pages, struct page *page,
1002 struct bio *bio = NULL;
1004 sector_t last_block_in_bio = 0;
1005 struct inode *inode = mapping->host;
1006 const unsigned blkbits = inode->i_blkbits;
1007 const unsigned blocksize = 1 << blkbits;
1008 sector_t block_in_file;
1009 sector_t last_block;
1010 sector_t last_block_in_file;
1012 struct f2fs_map_blocks map;
1018 map.m_next_pgofs = NULL;
1020 for (page_idx = 0; nr_pages; page_idx++, nr_pages--) {
1022 prefetchw(&page->flags);
1024 page = list_entry(pages->prev, struct page, lru);
1025 list_del(&page->lru);
1026 if (add_to_page_cache_lru(page, mapping,
1028 readahead_gfp_mask(mapping)))
1032 block_in_file = (sector_t)page->index;
1033 last_block = block_in_file + nr_pages;
1034 last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
1036 if (last_block > last_block_in_file)
1037 last_block = last_block_in_file;
1040 * Map blocks using the previous result first.
1042 if ((map.m_flags & F2FS_MAP_MAPPED) &&
1043 block_in_file > map.m_lblk &&
1044 block_in_file < (map.m_lblk + map.m_len))
1048 * Then do more f2fs_map_blocks() calls until we are
1049 * done with this page.
1053 if (block_in_file < last_block) {
1054 map.m_lblk = block_in_file;
1055 map.m_len = last_block - block_in_file;
1057 if (f2fs_map_blocks(inode, &map, 0,
1058 F2FS_GET_BLOCK_READ))
1059 goto set_error_page;
1062 if ((map.m_flags & F2FS_MAP_MAPPED)) {
1063 block_nr = map.m_pblk + block_in_file - map.m_lblk;
1064 SetPageMappedToDisk(page);
1066 if (!PageUptodate(page) && !cleancache_get_page(page)) {
1067 SetPageUptodate(page);
1071 zero_user_segment(page, 0, PAGE_SIZE);
1072 if (!PageUptodate(page))
1073 SetPageUptodate(page);
1079 * This page will go to BIO. Do we need to send this
1082 if (bio && (last_block_in_bio != block_nr - 1)) {
1084 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1088 bio = f2fs_grab_bio(inode, block_nr, nr_pages);
1091 goto set_error_page;
1093 bio_set_op_attrs(bio, REQ_OP_READ, 0);
1096 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
1097 goto submit_and_realloc;
1099 last_block_in_bio = block_nr;
1103 zero_user_segment(page, 0, PAGE_SIZE);
1108 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1116 BUG_ON(pages && !list_empty(pages));
1118 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1122 static int f2fs_read_data_page(struct file *file, struct page *page)
1124 struct inode *inode = page->mapping->host;
1127 trace_f2fs_readpage(page, DATA);
1129 /* If the file has inline data, try to read it directly */
1130 if (f2fs_has_inline_data(inode))
1131 ret = f2fs_read_inline_data(inode, page);
1133 ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1);
1137 static int f2fs_read_data_pages(struct file *file,
1138 struct address_space *mapping,
1139 struct list_head *pages, unsigned nr_pages)
1141 struct inode *inode = file->f_mapping->host;
1142 struct page *page = list_entry(pages->prev, struct page, lru);
1144 trace_f2fs_readpages(inode, page, nr_pages);
1146 /* If the file has inline data, skip readpages */
1147 if (f2fs_has_inline_data(inode))
1150 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages);
1153 int do_write_data_page(struct f2fs_io_info *fio)
1155 struct page *page = fio->page;
1156 struct inode *inode = page->mapping->host;
1157 struct dnode_of_data dn;
1160 set_new_dnode(&dn, inode, NULL, NULL, 0);
1161 err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
1165 fio->old_blkaddr = dn.data_blkaddr;
1167 /* This page is already truncated */
1168 if (fio->old_blkaddr == NULL_ADDR) {
1169 ClearPageUptodate(page);
1173 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) {
1174 gfp_t gfp_flags = GFP_NOFS;
1176 /* wait for GCed encrypted page writeback */
1177 f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode),
1180 fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page,
1182 if (IS_ERR(fio->encrypted_page)) {
1183 err = PTR_ERR(fio->encrypted_page);
1184 if (err == -ENOMEM) {
1185 /* flush pending ios and wait for a while */
1186 f2fs_flush_merged_bios(F2FS_I_SB(inode));
1187 congestion_wait(BLK_RW_ASYNC, HZ/50);
1188 gfp_flags |= __GFP_NOFAIL;
1196 set_page_writeback(page);
1199 * If current allocation needs SSR,
1200 * it had better in-place writes for updated data.
1202 if (unlikely(fio->old_blkaddr != NEW_ADDR &&
1203 !is_cold_data(page) &&
1204 !IS_ATOMIC_WRITTEN_PAGE(page) &&
1205 need_inplace_update(inode))) {
1206 rewrite_data_page(fio);
1207 set_inode_flag(inode, FI_UPDATE_WRITE);
1208 trace_f2fs_do_write_data_page(page, IPU);
1210 write_data_page(&dn, fio);
1211 trace_f2fs_do_write_data_page(page, OPU);
1212 set_inode_flag(inode, FI_APPEND_WRITE);
1213 if (page->index == 0)
1214 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
1217 f2fs_put_dnode(&dn);
1221 static int f2fs_write_data_page(struct page *page,
1222 struct writeback_control *wbc)
1224 struct inode *inode = page->mapping->host;
1225 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1226 loff_t i_size = i_size_read(inode);
1227 const pgoff_t end_index = ((unsigned long long) i_size)
1229 loff_t psize = (page->index + 1) << PAGE_SHIFT;
1230 unsigned offset = 0;
1231 bool need_balance_fs = false;
1233 struct f2fs_io_info fio = {
1237 .op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0,
1239 .encrypted_page = NULL,
1242 trace_f2fs_writepage(page, DATA);
1244 if (page->index < end_index)
1248 * If the offset is out-of-range of file size,
1249 * this page does not have to be written to disk.
1251 offset = i_size & (PAGE_SIZE - 1);
1252 if ((page->index >= end_index + 1) || !offset)
1255 zero_user_segment(page, offset, PAGE_SIZE);
1257 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1259 if (f2fs_is_drop_cache(inode))
1261 /* we should not write 0'th page having journal header */
1262 if (f2fs_is_volatile_file(inode) && (!page->index ||
1263 (!wbc->for_reclaim &&
1264 available_free_memory(sbi, BASE_CHECK))))
1267 /* we should bypass data pages to proceed the kworkder jobs */
1268 if (unlikely(f2fs_cp_error(sbi))) {
1269 mapping_set_error(page->mapping, -EIO);
1273 /* Dentry blocks are controlled by checkpoint */
1274 if (S_ISDIR(inode->i_mode)) {
1275 err = do_write_data_page(&fio);
1279 if (!wbc->for_reclaim)
1280 need_balance_fs = true;
1281 else if (has_not_enough_free_secs(sbi, 0, 0))
1286 if (f2fs_has_inline_data(inode))
1287 err = f2fs_write_inline_data(inode, page);
1289 err = do_write_data_page(&fio);
1290 if (F2FS_I(inode)->last_disk_size < psize)
1291 F2FS_I(inode)->last_disk_size = psize;
1292 f2fs_unlock_op(sbi);
1294 if (err && err != -ENOENT)
1297 clear_cold_data(page);
1299 inode_dec_dirty_pages(inode);
1301 ClearPageUptodate(page);
1303 if (wbc->for_reclaim) {
1304 f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE);
1305 remove_dirty_inode(inode);
1309 f2fs_balance_fs(sbi, need_balance_fs);
1311 if (unlikely(f2fs_cp_error(sbi)))
1312 f2fs_submit_merged_bio(sbi, DATA, WRITE);
1317 redirty_page_for_writepage(wbc, page);
1323 * This function was copied from write_cche_pages from mm/page-writeback.c.
1324 * The major change is making write step of cold data page separately from
1325 * warm/hot data page.
1327 static int f2fs_write_cache_pages(struct address_space *mapping,
1328 struct writeback_control *wbc)
1332 struct pagevec pvec;
1334 pgoff_t uninitialized_var(writeback_index);
1336 pgoff_t end; /* Inclusive */
1339 int range_whole = 0;
1343 pagevec_init(&pvec, 0);
1345 if (wbc->range_cyclic) {
1346 writeback_index = mapping->writeback_index; /* prev offset */
1347 index = writeback_index;
1354 index = wbc->range_start >> PAGE_SHIFT;
1355 end = wbc->range_end >> PAGE_SHIFT;
1356 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
1358 cycled = 1; /* ignore range_cyclic tests */
1360 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
1361 tag = PAGECACHE_TAG_TOWRITE;
1363 tag = PAGECACHE_TAG_DIRTY;
1365 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
1366 tag_pages_for_writeback(mapping, index, end);
1368 while (!done && (index <= end)) {
1371 nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag,
1372 min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1);
1376 for (i = 0; i < nr_pages; i++) {
1377 struct page *page = pvec.pages[i];
1379 if (page->index > end) {
1384 done_index = page->index;
1388 if (unlikely(page->mapping != mapping)) {
1394 if (!PageDirty(page)) {
1395 /* someone wrote it for us */
1396 goto continue_unlock;
1399 if (PageWriteback(page)) {
1400 if (wbc->sync_mode != WB_SYNC_NONE)
1401 f2fs_wait_on_page_writeback(page,
1404 goto continue_unlock;
1407 BUG_ON(PageWriteback(page));
1408 if (!clear_page_dirty_for_io(page))
1409 goto continue_unlock;
1411 ret = mapping->a_ops->writepage(page, wbc);
1412 if (unlikely(ret)) {
1413 done_index = page->index + 1;
1420 if (--wbc->nr_to_write <= 0 &&
1421 wbc->sync_mode == WB_SYNC_NONE) {
1426 pagevec_release(&pvec);
1430 if (!cycled && !done) {
1433 end = writeback_index - 1;
1436 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
1437 mapping->writeback_index = done_index;
1440 f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping), mapping->host,
1441 NULL, 0, DATA, WRITE);
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.
1485 remove_dirty_inode(inode);
1489 wbc->pages_skipped += get_dirty_pages(inode);
1490 trace_f2fs_writepages(mapping->host, wbc, DATA);
1494 static void f2fs_write_failed(struct address_space *mapping, loff_t to)
1496 struct inode *inode = mapping->host;
1497 loff_t i_size = i_size_read(inode);
1500 truncate_pagecache(inode, i_size);
1501 truncate_blocks(inode, i_size, true);
1505 static int prepare_write_begin(struct f2fs_sb_info *sbi,
1506 struct page *page, loff_t pos, unsigned len,
1507 block_t *blk_addr, bool *node_changed)
1509 struct inode *inode = page->mapping->host;
1510 pgoff_t index = page->index;
1511 struct dnode_of_data dn;
1513 bool locked = false;
1514 struct extent_info ei;
1518 * we already allocated all the blocks, so we don't need to get
1519 * the block addresses when there is no need to fill the page.
1521 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE)
1524 if (f2fs_has_inline_data(inode) ||
1525 (pos & PAGE_MASK) >= i_size_read(inode)) {
1530 /* check inline_data */
1531 ipage = get_node_page(sbi, inode->i_ino);
1532 if (IS_ERR(ipage)) {
1533 err = PTR_ERR(ipage);
1537 set_new_dnode(&dn, inode, ipage, ipage, 0);
1539 if (f2fs_has_inline_data(inode)) {
1540 if (pos + len <= MAX_INLINE_DATA) {
1541 read_inline_data(page, ipage);
1542 set_inode_flag(inode, FI_DATA_EXIST);
1544 set_inline_node(ipage);
1546 err = f2fs_convert_inline_page(&dn, page);
1549 if (dn.data_blkaddr == NULL_ADDR)
1550 err = f2fs_get_block(&dn, index);
1552 } else if (locked) {
1553 err = f2fs_get_block(&dn, index);
1555 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1556 dn.data_blkaddr = ei.blk + index - ei.fofs;
1559 err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
1560 if (err || dn.data_blkaddr == NULL_ADDR) {
1561 f2fs_put_dnode(&dn);
1569 /* convert_inline_page can make node_changed */
1570 *blk_addr = dn.data_blkaddr;
1571 *node_changed = dn.node_changed;
1573 f2fs_put_dnode(&dn);
1576 f2fs_unlock_op(sbi);
1580 static int f2fs_write_begin(struct file *file, struct address_space *mapping,
1581 loff_t pos, unsigned len, unsigned flags,
1582 struct page **pagep, void **fsdata)
1584 struct inode *inode = mapping->host;
1585 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1586 struct page *page = NULL;
1587 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
1588 bool need_balance = false;
1589 block_t blkaddr = NULL_ADDR;
1592 trace_f2fs_write_begin(inode, pos, len, flags);
1595 * We should check this at this moment to avoid deadlock on inode page
1596 * and #0 page. The locking rule for inline_data conversion should be:
1597 * lock_page(page #0) -> lock_page(inode_page)
1600 err = f2fs_convert_inline_inode(inode);
1605 page = grab_cache_page_write_begin(mapping, index, flags);
1613 err = prepare_write_begin(sbi, page, pos, len,
1614 &blkaddr, &need_balance);
1618 if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) {
1620 f2fs_balance_fs(sbi, true);
1622 if (page->mapping != mapping) {
1623 /* The page got truncated from under us */
1624 f2fs_put_page(page, 1);
1629 f2fs_wait_on_page_writeback(page, DATA, false);
1631 /* wait for GCed encrypted page writeback */
1632 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
1633 f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr);
1635 if (len == PAGE_SIZE || PageUptodate(page))
1638 if (blkaddr == NEW_ADDR) {
1639 zero_user_segment(page, 0, PAGE_SIZE);
1640 SetPageUptodate(page);
1644 bio = f2fs_grab_bio(inode, blkaddr, 1);
1649 bio_set_op_attrs(bio, REQ_OP_READ, READ_SYNC);
1650 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1656 __submit_bio(sbi, bio, DATA);
1659 if (unlikely(page->mapping != mapping)) {
1660 f2fs_put_page(page, 1);
1663 if (unlikely(!PageUptodate(page))) {
1671 f2fs_put_page(page, 1);
1672 f2fs_write_failed(mapping, pos + len);
1676 static int f2fs_write_end(struct file *file,
1677 struct address_space *mapping,
1678 loff_t pos, unsigned len, unsigned copied,
1679 struct page *page, void *fsdata)
1681 struct inode *inode = page->mapping->host;
1683 trace_f2fs_write_end(inode, pos, len, copied);
1686 * This should be come from len == PAGE_SIZE, and we expect copied
1687 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
1688 * let generic_perform_write() try to copy data again through copied=0.
1690 if (!PageUptodate(page)) {
1691 if (unlikely(copied != PAGE_SIZE))
1694 SetPageUptodate(page);
1699 set_page_dirty(page);
1700 clear_cold_data(page);
1702 if (pos + copied > i_size_read(inode))
1703 f2fs_i_size_write(inode, pos + copied);
1705 f2fs_put_page(page, 1);
1706 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
1710 static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
1713 unsigned blocksize_mask = inode->i_sb->s_blocksize - 1;
1715 if (offset & blocksize_mask)
1718 if (iov_iter_alignment(iter) & blocksize_mask)
1724 static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
1726 struct address_space *mapping = iocb->ki_filp->f_mapping;
1727 struct inode *inode = mapping->host;
1728 size_t count = iov_iter_count(iter);
1729 loff_t offset = iocb->ki_pos;
1730 int rw = iov_iter_rw(iter);
1733 err = check_direct_IO(inode, iter, offset);
1737 if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
1739 if (test_opt(F2FS_I_SB(inode), LFS))
1742 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
1744 down_read(&F2FS_I(inode)->dio_rwsem[rw]);
1745 err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio);
1746 up_read(&F2FS_I(inode)->dio_rwsem[rw]);
1750 set_inode_flag(inode, FI_UPDATE_WRITE);
1752 f2fs_write_failed(mapping, offset + count);
1755 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
1760 void f2fs_invalidate_page(struct page *page, unsigned int offset,
1761 unsigned int length)
1763 struct inode *inode = page->mapping->host;
1764 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1766 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
1767 (offset % PAGE_SIZE || length != PAGE_SIZE))
1770 if (PageDirty(page)) {
1771 if (inode->i_ino == F2FS_META_INO(sbi)) {
1772 dec_page_count(sbi, F2FS_DIRTY_META);
1773 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
1774 dec_page_count(sbi, F2FS_DIRTY_NODES);
1776 inode_dec_dirty_pages(inode);
1777 remove_dirty_inode(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 #ifdef CONFIG_MIGRATION
1878 #include <linux/migrate.h>
1880 int f2fs_migrate_page(struct address_space *mapping,
1881 struct page *newpage, struct page *page, enum migrate_mode mode)
1883 int rc, extra_count;
1884 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
1885 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
1887 BUG_ON(PageWriteback(page));
1889 /* migrating an atomic written page is safe with the inmem_lock hold */
1890 if (atomic_written && !mutex_trylock(&fi->inmem_lock))
1894 * A reference is expected if PagePrivate set when move mapping,
1895 * however F2FS breaks this for maintaining dirty page counts when
1896 * truncating pages. So here adjusting the 'extra_count' make it work.
1898 extra_count = (atomic_written ? 1 : 0) - page_has_private(page);
1899 rc = migrate_page_move_mapping(mapping, newpage,
1900 page, NULL, mode, extra_count);
1901 if (rc != MIGRATEPAGE_SUCCESS) {
1903 mutex_unlock(&fi->inmem_lock);
1907 if (atomic_written) {
1908 struct inmem_pages *cur;
1909 list_for_each_entry(cur, &fi->inmem_pages, list)
1910 if (cur->page == page) {
1911 cur->page = newpage;
1914 mutex_unlock(&fi->inmem_lock);
1919 if (PagePrivate(page))
1920 SetPagePrivate(newpage);
1921 set_page_private(newpage, page_private(page));
1923 migrate_page_copy(newpage, page);
1925 return MIGRATEPAGE_SUCCESS;
1929 const struct address_space_operations f2fs_dblock_aops = {
1930 .readpage = f2fs_read_data_page,
1931 .readpages = f2fs_read_data_pages,
1932 .writepage = f2fs_write_data_page,
1933 .writepages = f2fs_write_data_pages,
1934 .write_begin = f2fs_write_begin,
1935 .write_end = f2fs_write_end,
1936 .set_page_dirty = f2fs_set_data_page_dirty,
1937 .invalidatepage = f2fs_invalidate_page,
1938 .releasepage = f2fs_release_page,
1939 .direct_IO = f2fs_direct_IO,
1941 #ifdef CONFIG_MIGRATION
1942 .migratepage = f2fs_migrate_page,