1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
9 #include <linux/f2fs_fs.h>
10 #include <linux/buffer_head.h>
11 #include <linux/mpage.h>
12 #include <linux/writeback.h>
13 #include <linux/backing-dev.h>
14 #include <linux/pagevec.h>
15 #include <linux/blkdev.h>
16 #include <linux/bio.h>
17 #include <linux/prefetch.h>
18 #include <linux/uio.h>
19 #include <linux/cleancache.h>
20 #include <linux/sched/signal.h>
26 #include <trace/events/f2fs.h>
28 #define NUM_PREALLOC_POST_READ_CTXS 128
30 static struct kmem_cache *bio_post_read_ctx_cache;
31 static mempool_t *bio_post_read_ctx_pool;
33 static bool __is_cp_guaranteed(struct page *page)
35 struct address_space *mapping = page->mapping;
37 struct f2fs_sb_info *sbi;
42 inode = mapping->host;
43 sbi = F2FS_I_SB(inode);
45 if (inode->i_ino == F2FS_META_INO(sbi) ||
46 inode->i_ino == F2FS_NODE_INO(sbi) ||
47 S_ISDIR(inode->i_mode) ||
48 (S_ISREG(inode->i_mode) &&
49 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
55 static enum count_type __read_io_type(struct page *page)
57 struct address_space *mapping = page->mapping;
60 struct inode *inode = mapping->host;
61 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
63 if (inode->i_ino == F2FS_META_INO(sbi))
66 if (inode->i_ino == F2FS_NODE_INO(sbi))
72 /* postprocessing steps for read bios */
73 enum bio_post_read_step {
78 struct bio_post_read_ctx {
80 struct work_struct work;
81 unsigned int cur_step;
82 unsigned int enabled_steps;
85 static void __read_end_io(struct bio *bio)
91 bio_for_each_segment_all(bv, bio, i) {
94 /* PG_error was set if any post_read step failed */
95 if (bio->bi_status || PageError(page)) {
96 ClearPageUptodate(page);
97 /* will re-read again later */
100 SetPageUptodate(page);
102 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
106 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
110 static void bio_post_read_processing(struct bio_post_read_ctx *ctx);
112 static void decrypt_work(struct work_struct *work)
114 struct bio_post_read_ctx *ctx =
115 container_of(work, struct bio_post_read_ctx, work);
117 fscrypt_decrypt_bio(ctx->bio);
119 bio_post_read_processing(ctx);
122 static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
124 switch (++ctx->cur_step) {
126 if (ctx->enabled_steps & (1 << STEP_DECRYPT)) {
127 INIT_WORK(&ctx->work, decrypt_work);
128 fscrypt_enqueue_decrypt_work(&ctx->work);
134 __read_end_io(ctx->bio);
138 static bool f2fs_bio_post_read_required(struct bio *bio)
140 return bio->bi_private && !bio->bi_status;
143 static void f2fs_read_end_io(struct bio *bio)
145 if (time_to_inject(F2FS_P_SB(bio_first_page_all(bio)),
147 f2fs_show_injection_info(FAULT_READ_IO);
148 bio->bi_status = BLK_STS_IOERR;
151 if (f2fs_bio_post_read_required(bio)) {
152 struct bio_post_read_ctx *ctx = bio->bi_private;
154 ctx->cur_step = STEP_INITIAL;
155 bio_post_read_processing(ctx);
162 static void f2fs_write_end_io(struct bio *bio)
164 struct f2fs_sb_info *sbi = bio->bi_private;
165 struct bio_vec *bvec;
168 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
169 f2fs_show_injection_info(FAULT_WRITE_IO);
170 bio->bi_status = BLK_STS_IOERR;
173 bio_for_each_segment_all(bvec, bio, i) {
174 struct page *page = bvec->bv_page;
175 enum count_type type = WB_DATA_TYPE(page);
177 if (IS_DUMMY_WRITTEN_PAGE(page)) {
178 set_page_private(page, (unsigned long)NULL);
179 ClearPagePrivate(page);
181 mempool_free(page, sbi->write_io_dummy);
183 if (unlikely(bio->bi_status))
184 f2fs_stop_checkpoint(sbi, true);
188 fscrypt_pullback_bio_page(&page, true);
190 if (unlikely(bio->bi_status)) {
191 mapping_set_error(page->mapping, -EIO);
192 if (type == F2FS_WB_CP_DATA)
193 f2fs_stop_checkpoint(sbi, true);
196 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
197 page->index != nid_of_node(page));
199 dec_page_count(sbi, type);
200 if (f2fs_in_warm_node_list(sbi, page))
201 f2fs_del_fsync_node_entry(sbi, page);
202 clear_cold_data(page);
203 end_page_writeback(page);
205 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
206 wq_has_sleeper(&sbi->cp_wait))
207 wake_up(&sbi->cp_wait);
213 * Return true, if pre_bio's bdev is same as its target device.
215 struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
216 block_t blk_addr, struct bio *bio)
218 struct block_device *bdev = sbi->sb->s_bdev;
221 for (i = 0; i < sbi->s_ndevs; i++) {
222 if (FDEV(i).start_blk <= blk_addr &&
223 FDEV(i).end_blk >= blk_addr) {
224 blk_addr -= FDEV(i).start_blk;
230 bio_set_dev(bio, bdev);
231 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
236 int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
240 for (i = 0; i < sbi->s_ndevs; i++)
241 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
246 static bool __same_bdev(struct f2fs_sb_info *sbi,
247 block_t blk_addr, struct bio *bio)
249 struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
250 return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
254 * Low-level block read/write IO operations.
256 static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr,
257 struct writeback_control *wbc,
258 int npages, bool is_read,
259 enum page_type type, enum temp_type temp)
263 bio = f2fs_bio_alloc(sbi, npages, true);
265 f2fs_target_device(sbi, blk_addr, bio);
267 bio->bi_end_io = f2fs_read_end_io;
268 bio->bi_private = NULL;
270 bio->bi_end_io = f2fs_write_end_io;
271 bio->bi_private = sbi;
272 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, type, temp);
275 wbc_init_bio(wbc, bio);
280 static inline void __submit_bio(struct f2fs_sb_info *sbi,
281 struct bio *bio, enum page_type type)
283 if (!is_read_io(bio_op(bio))) {
286 if (type != DATA && type != NODE)
289 if (test_opt(sbi, LFS) && current->plug)
290 blk_finish_plug(current->plug);
292 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
293 start %= F2FS_IO_SIZE(sbi);
298 /* fill dummy pages */
299 for (; start < F2FS_IO_SIZE(sbi); start++) {
301 mempool_alloc(sbi->write_io_dummy,
302 GFP_NOIO | __GFP_ZERO | __GFP_NOFAIL);
303 f2fs_bug_on(sbi, !page);
305 SetPagePrivate(page);
306 set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
308 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
312 * In the NODE case, we lose next block address chain. So, we
313 * need to do checkpoint in f2fs_sync_file.
316 set_sbi_flag(sbi, SBI_NEED_CP);
319 if (is_read_io(bio_op(bio)))
320 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
322 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
326 static void __submit_merged_bio(struct f2fs_bio_info *io)
328 struct f2fs_io_info *fio = &io->fio;
333 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
335 if (is_read_io(fio->op))
336 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
338 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
340 __submit_bio(io->sbi, io->bio, fio->type);
344 static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
345 struct page *page, nid_t ino)
347 struct bio_vec *bvec;
354 if (!inode && !page && !ino)
357 bio_for_each_segment_all(bvec, io->bio, i) {
359 if (bvec->bv_page->mapping)
360 target = bvec->bv_page;
362 target = fscrypt_control_page(bvec->bv_page);
364 if (inode && inode == target->mapping->host)
366 if (page && page == target)
368 if (ino && ino == ino_of_node(target))
375 static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode,
376 struct page *page, nid_t ino,
379 enum page_type btype = PAGE_TYPE_OF_BIO(type);
381 struct f2fs_bio_info *io;
384 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
385 io = sbi->write_io[btype] + temp;
387 down_read(&io->io_rwsem);
388 ret = __has_merged_page(io, inode, page, ino);
389 up_read(&io->io_rwsem);
391 /* TODO: use HOT temp only for meta pages now. */
392 if (ret || btype == META)
398 static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
399 enum page_type type, enum temp_type temp)
401 enum page_type btype = PAGE_TYPE_OF_BIO(type);
402 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
404 down_write(&io->io_rwsem);
406 /* change META to META_FLUSH in the checkpoint procedure */
407 if (type >= META_FLUSH) {
408 io->fio.type = META_FLUSH;
409 io->fio.op = REQ_OP_WRITE;
410 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
411 if (!test_opt(sbi, NOBARRIER))
412 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
414 __submit_merged_bio(io);
415 up_write(&io->io_rwsem);
418 static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
419 struct inode *inode, struct page *page,
420 nid_t ino, enum page_type type, bool force)
424 if (!force && !has_merged_page(sbi, inode, page, ino, type))
427 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
429 __f2fs_submit_merged_write(sbi, type, temp);
431 /* TODO: use HOT temp only for meta pages now. */
437 void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
439 __submit_merged_write_cond(sbi, NULL, 0, 0, type, true);
442 void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
443 struct inode *inode, struct page *page,
444 nid_t ino, enum page_type type)
446 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
449 void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
451 f2fs_submit_merged_write(sbi, DATA);
452 f2fs_submit_merged_write(sbi, NODE);
453 f2fs_submit_merged_write(sbi, META);
457 * Fill the locked page with data located in the block address.
458 * A caller needs to unlock the page on failure.
460 int f2fs_submit_page_bio(struct f2fs_io_info *fio)
463 struct page *page = fio->encrypted_page ?
464 fio->encrypted_page : fio->page;
466 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
467 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
470 trace_f2fs_submit_page_bio(page, fio);
471 f2fs_trace_ios(fio, 0);
473 /* Allocate a new bio */
474 bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc,
475 1, is_read_io(fio->op), fio->type, fio->temp);
477 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
482 if (fio->io_wbc && !is_read_io(fio->op))
483 wbc_account_io(fio->io_wbc, page, PAGE_SIZE);
485 bio_set_op_attrs(bio, fio->op, fio->op_flags);
487 inc_page_count(fio->sbi, is_read_io(fio->op) ?
488 __read_io_type(page): WB_DATA_TYPE(fio->page));
490 __submit_bio(fio->sbi, bio, fio->type);
494 void f2fs_submit_page_write(struct f2fs_io_info *fio)
496 struct f2fs_sb_info *sbi = fio->sbi;
497 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
498 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
499 struct page *bio_page;
501 f2fs_bug_on(sbi, is_read_io(fio->op));
503 down_write(&io->io_rwsem);
506 spin_lock(&io->io_lock);
507 if (list_empty(&io->io_list)) {
508 spin_unlock(&io->io_lock);
511 fio = list_first_entry(&io->io_list,
512 struct f2fs_io_info, list);
513 list_del(&fio->list);
514 spin_unlock(&io->io_lock);
517 if (__is_valid_data_blkaddr(fio->old_blkaddr))
518 verify_block_addr(fio, fio->old_blkaddr);
519 verify_block_addr(fio, fio->new_blkaddr);
521 bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
523 /* set submitted = true as a return value */
524 fio->submitted = true;
526 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
528 if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 ||
529 (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) ||
530 !__same_bdev(sbi, fio->new_blkaddr, io->bio)))
531 __submit_merged_bio(io);
533 if (io->bio == NULL) {
534 if ((fio->type == DATA || fio->type == NODE) &&
535 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
536 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
540 io->bio = __bio_alloc(sbi, fio->new_blkaddr, fio->io_wbc,
541 BIO_MAX_PAGES, false,
542 fio->type, fio->temp);
546 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
547 __submit_merged_bio(io);
552 wbc_account_io(fio->io_wbc, bio_page, PAGE_SIZE);
554 io->last_block_in_bio = fio->new_blkaddr;
555 f2fs_trace_ios(fio, 0);
557 trace_f2fs_submit_page_write(fio->page, fio);
562 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
563 f2fs_is_checkpoint_ready(sbi))
564 __submit_merged_bio(io);
565 up_write(&io->io_rwsem);
568 static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
569 unsigned nr_pages, unsigned op_flag)
571 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
573 struct bio_post_read_ctx *ctx;
574 unsigned int post_read_steps = 0;
576 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
577 return ERR_PTR(-EFAULT);
579 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
581 return ERR_PTR(-ENOMEM);
582 f2fs_target_device(sbi, blkaddr, bio);
583 bio->bi_end_io = f2fs_read_end_io;
584 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
586 if (f2fs_encrypted_file(inode))
587 post_read_steps |= 1 << STEP_DECRYPT;
588 if (post_read_steps) {
589 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
592 return ERR_PTR(-ENOMEM);
595 ctx->enabled_steps = post_read_steps;
596 bio->bi_private = ctx;
602 /* This can handle encryption stuffs */
603 static int f2fs_submit_page_read(struct inode *inode, struct page *page,
606 struct bio *bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0);
611 /* wait for GCed page writeback via META_MAPPING */
612 f2fs_wait_on_block_writeback(inode, blkaddr);
614 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
618 ClearPageError(page);
619 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
620 __submit_bio(F2FS_I_SB(inode), bio, DATA);
624 static void __set_data_blkaddr(struct dnode_of_data *dn)
626 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
630 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
631 base = get_extra_isize(dn->inode);
633 /* Get physical address of data block */
634 addr_array = blkaddr_in_node(rn);
635 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
639 * Lock ordering for the change of data block address:
642 * update block addresses in the node page
644 void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
646 f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
647 __set_data_blkaddr(dn);
648 if (set_page_dirty(dn->node_page))
649 dn->node_changed = true;
652 void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
654 dn->data_blkaddr = blkaddr;
655 f2fs_set_data_blkaddr(dn);
656 f2fs_update_extent_cache(dn);
659 /* dn->ofs_in_node will be returned with up-to-date last block pointer */
660 int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
662 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
668 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
670 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
673 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
674 dn->ofs_in_node, count);
676 f2fs_wait_on_page_writeback(dn->node_page, NODE, true);
678 for (; count > 0; dn->ofs_in_node++) {
679 block_t blkaddr = datablock_addr(dn->inode,
680 dn->node_page, dn->ofs_in_node);
681 if (blkaddr == NULL_ADDR) {
682 dn->data_blkaddr = NEW_ADDR;
683 __set_data_blkaddr(dn);
688 if (set_page_dirty(dn->node_page))
689 dn->node_changed = true;
693 /* Should keep dn->ofs_in_node unchanged */
694 int f2fs_reserve_new_block(struct dnode_of_data *dn)
696 unsigned int ofs_in_node = dn->ofs_in_node;
699 ret = f2fs_reserve_new_blocks(dn, 1);
700 dn->ofs_in_node = ofs_in_node;
704 int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
706 bool need_put = dn->inode_page ? false : true;
709 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
713 if (dn->data_blkaddr == NULL_ADDR)
714 err = f2fs_reserve_new_block(dn);
720 int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
722 struct extent_info ei = {0,0,0};
723 struct inode *inode = dn->inode;
725 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
726 dn->data_blkaddr = ei.blk + index - ei.fofs;
730 return f2fs_reserve_block(dn, index);
733 struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
734 int op_flags, bool for_write)
736 struct address_space *mapping = inode->i_mapping;
737 struct dnode_of_data dn;
739 struct extent_info ei = {0,0,0};
742 page = f2fs_grab_cache_page(mapping, index, for_write);
744 return ERR_PTR(-ENOMEM);
746 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
747 dn.data_blkaddr = ei.blk + index - ei.fofs;
751 set_new_dnode(&dn, inode, NULL, NULL, 0);
752 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
757 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
762 if (PageUptodate(page)) {
768 * A new dentry page is allocated but not able to be written, since its
769 * new inode page couldn't be allocated due to -ENOSPC.
770 * In such the case, its blkaddr can be remained as NEW_ADDR.
771 * see, f2fs_add_link -> f2fs_get_new_data_page ->
772 * f2fs_init_inode_metadata.
774 if (dn.data_blkaddr == NEW_ADDR) {
775 zero_user_segment(page, 0, PAGE_SIZE);
776 if (!PageUptodate(page))
777 SetPageUptodate(page);
782 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr);
788 f2fs_put_page(page, 1);
792 struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
794 struct address_space *mapping = inode->i_mapping;
797 page = find_get_page(mapping, index);
798 if (page && PageUptodate(page))
800 f2fs_put_page(page, 0);
802 page = f2fs_get_read_data_page(inode, index, 0, false);
806 if (PageUptodate(page))
809 wait_on_page_locked(page);
810 if (unlikely(!PageUptodate(page))) {
811 f2fs_put_page(page, 0);
812 return ERR_PTR(-EIO);
818 * If it tries to access a hole, return an error.
819 * Because, the callers, functions in dir.c and GC, should be able to know
820 * whether this page exists or not.
822 struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
825 struct address_space *mapping = inode->i_mapping;
828 page = f2fs_get_read_data_page(inode, index, 0, for_write);
832 /* wait for read completion */
834 if (unlikely(page->mapping != mapping)) {
835 f2fs_put_page(page, 1);
838 if (unlikely(!PageUptodate(page))) {
839 f2fs_put_page(page, 1);
840 return ERR_PTR(-EIO);
846 * Caller ensures that this data page is never allocated.
847 * A new zero-filled data page is allocated in the page cache.
849 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
851 * Note that, ipage is set only by make_empty_dir, and if any error occur,
852 * ipage should be released by this function.
854 struct page *f2fs_get_new_data_page(struct inode *inode,
855 struct page *ipage, pgoff_t index, bool new_i_size)
857 struct address_space *mapping = inode->i_mapping;
859 struct dnode_of_data dn;
862 page = f2fs_grab_cache_page(mapping, index, true);
865 * before exiting, we should make sure ipage will be released
866 * if any error occur.
868 f2fs_put_page(ipage, 1);
869 return ERR_PTR(-ENOMEM);
872 set_new_dnode(&dn, inode, ipage, NULL, 0);
873 err = f2fs_reserve_block(&dn, index);
875 f2fs_put_page(page, 1);
881 if (PageUptodate(page))
884 if (dn.data_blkaddr == NEW_ADDR) {
885 zero_user_segment(page, 0, PAGE_SIZE);
886 if (!PageUptodate(page))
887 SetPageUptodate(page);
889 f2fs_put_page(page, 1);
891 /* if ipage exists, blkaddr should be NEW_ADDR */
892 f2fs_bug_on(F2FS_I_SB(inode), ipage);
893 page = f2fs_get_lock_data_page(inode, index, true);
898 if (new_i_size && i_size_read(inode) <
899 ((loff_t)(index + 1) << PAGE_SHIFT))
900 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
904 static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
906 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
907 struct f2fs_summary sum;
913 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
916 err = f2fs_get_node_info(sbi, dn->nid, &ni);
920 dn->data_blkaddr = datablock_addr(dn->inode,
921 dn->node_page, dn->ofs_in_node);
922 if (dn->data_blkaddr != NULL_ADDR)
925 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
929 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
930 old_blkaddr = dn->data_blkaddr;
931 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
932 &sum, seg_type, NULL, false);
933 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
934 invalidate_mapping_pages(META_MAPPING(sbi),
935 old_blkaddr, old_blkaddr);
936 f2fs_set_data_blkaddr(dn);
939 * i_size will be updated by direct_IO. Otherwise, we'll get stale
940 * data from unwritten block via dio_read.
945 int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
947 struct inode *inode = file_inode(iocb->ki_filp);
948 struct f2fs_map_blocks map;
951 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
953 /* convert inline data for Direct I/O*/
955 err = f2fs_convert_inline_inode(inode);
960 if (is_inode_flag_set(inode, FI_NO_PREALLOC))
963 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
964 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
965 if (map.m_len > map.m_lblk)
966 map.m_len -= map.m_lblk;
970 map.m_next_pgofs = NULL;
971 map.m_next_extent = NULL;
972 map.m_seg_type = NO_CHECK_TYPE;
975 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
976 flag = f2fs_force_buffered_io(inode, iocb, from) ?
977 F2FS_GET_BLOCK_PRE_AIO :
978 F2FS_GET_BLOCK_PRE_DIO;
981 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
982 err = f2fs_convert_inline_inode(inode);
986 if (f2fs_has_inline_data(inode))
989 flag = F2FS_GET_BLOCK_PRE_AIO;
992 err = f2fs_map_blocks(inode, &map, 1, flag);
993 if (map.m_len > 0 && err == -ENOSPC) {
995 set_inode_flag(inode, FI_NO_PREALLOC);
1001 void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
1003 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1005 down_read(&sbi->node_change);
1007 up_read(&sbi->node_change);
1012 f2fs_unlock_op(sbi);
1017 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
1018 * f2fs_map_blocks structure.
1019 * If original data blocks are allocated, then give them to blockdev.
1021 * a. preallocate requested block addresses
1022 * b. do not use extent cache for better performance
1023 * c. give the block addresses to blockdev
1025 int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
1026 int create, int flag)
1028 unsigned int maxblocks = map->m_len;
1029 struct dnode_of_data dn;
1030 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1031 int mode = create ? ALLOC_NODE : LOOKUP_NODE;
1032 pgoff_t pgofs, end_offset, end;
1033 int err = 0, ofs = 1;
1034 unsigned int ofs_in_node, last_ofs_in_node;
1036 struct extent_info ei = {0,0,0};
1038 unsigned int start_pgofs;
1046 /* it only supports block size == page size */
1047 pgofs = (pgoff_t)map->m_lblk;
1048 end = pgofs + maxblocks;
1050 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
1051 map->m_pblk = ei.blk + pgofs - ei.fofs;
1052 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1053 map->m_flags = F2FS_MAP_MAPPED;
1054 if (map->m_next_extent)
1055 *map->m_next_extent = pgofs + map->m_len;
1057 /* for hardware encryption, but to avoid potential issue in future */
1058 if (flag == F2FS_GET_BLOCK_DIO)
1059 f2fs_wait_on_block_writeback_range(inode,
1060 map->m_pblk, map->m_len);
1066 __do_map_lock(sbi, flag, true);
1068 /* When reading holes, we need its node page */
1069 set_new_dnode(&dn, inode, NULL, NULL, 0);
1070 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1072 if (flag == F2FS_GET_BLOCK_BMAP)
1074 if (err == -ENOENT) {
1076 if (map->m_next_pgofs)
1077 *map->m_next_pgofs =
1078 f2fs_get_next_page_offset(&dn, pgofs);
1079 if (map->m_next_extent)
1080 *map->m_next_extent =
1081 f2fs_get_next_page_offset(&dn, pgofs);
1086 start_pgofs = pgofs;
1088 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
1089 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1092 blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
1094 if (__is_valid_data_blkaddr(blkaddr) &&
1095 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
1100 if (is_valid_data_blkaddr(sbi, blkaddr)) {
1101 /* use out-place-update for driect IO under LFS mode */
1102 if (test_opt(sbi, LFS) && create &&
1103 flag == F2FS_GET_BLOCK_DIO) {
1104 err = __allocate_data_block(&dn, map->m_seg_type);
1106 set_inode_flag(inode, FI_APPEND_WRITE);
1110 if (unlikely(f2fs_cp_error(sbi))) {
1114 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1115 if (blkaddr == NULL_ADDR) {
1117 last_ofs_in_node = dn.ofs_in_node;
1120 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1121 flag != F2FS_GET_BLOCK_DIO);
1122 err = __allocate_data_block(&dn,
1125 set_inode_flag(inode, FI_APPEND_WRITE);
1129 map->m_flags |= F2FS_MAP_NEW;
1130 blkaddr = dn.data_blkaddr;
1132 if (flag == F2FS_GET_BLOCK_BMAP) {
1136 if (flag == F2FS_GET_BLOCK_PRECACHE)
1138 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1139 blkaddr == NULL_ADDR) {
1140 if (map->m_next_pgofs)
1141 *map->m_next_pgofs = pgofs + 1;
1144 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1145 /* for defragment case */
1146 if (map->m_next_pgofs)
1147 *map->m_next_pgofs = pgofs + 1;
1153 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1156 if (map->m_len == 0) {
1157 /* preallocated unwritten block should be mapped for fiemap. */
1158 if (blkaddr == NEW_ADDR)
1159 map->m_flags |= F2FS_MAP_UNWRITTEN;
1160 map->m_flags |= F2FS_MAP_MAPPED;
1162 map->m_pblk = blkaddr;
1164 } else if ((map->m_pblk != NEW_ADDR &&
1165 blkaddr == (map->m_pblk + ofs)) ||
1166 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
1167 flag == F2FS_GET_BLOCK_PRE_DIO) {
1178 /* preallocate blocks in batch for one dnode page */
1179 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1180 (pgofs == end || dn.ofs_in_node == end_offset)) {
1182 dn.ofs_in_node = ofs_in_node;
1183 err = f2fs_reserve_new_blocks(&dn, prealloc);
1187 map->m_len += dn.ofs_in_node - ofs_in_node;
1188 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1192 dn.ofs_in_node = end_offset;
1197 else if (dn.ofs_in_node < end_offset)
1200 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1201 if (map->m_flags & F2FS_MAP_MAPPED) {
1202 unsigned int ofs = start_pgofs - map->m_lblk;
1204 f2fs_update_extent_cache_range(&dn,
1205 start_pgofs, map->m_pblk + ofs,
1210 f2fs_put_dnode(&dn);
1213 __do_map_lock(sbi, flag, false);
1214 f2fs_balance_fs(sbi, dn.node_changed);
1220 /* for hardware encryption, but to avoid potential issue in future */
1221 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1222 f2fs_wait_on_block_writeback_range(inode,
1223 map->m_pblk, map->m_len);
1225 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1226 if (map->m_flags & F2FS_MAP_MAPPED) {
1227 unsigned int ofs = start_pgofs - map->m_lblk;
1229 f2fs_update_extent_cache_range(&dn,
1230 start_pgofs, map->m_pblk + ofs,
1233 if (map->m_next_extent)
1234 *map->m_next_extent = pgofs + 1;
1236 f2fs_put_dnode(&dn);
1239 __do_map_lock(sbi, flag, false);
1240 f2fs_balance_fs(sbi, dn.node_changed);
1243 trace_f2fs_map_blocks(inode, map, err);
1247 bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1249 struct f2fs_map_blocks map;
1253 if (pos + len > i_size_read(inode))
1256 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1257 map.m_next_pgofs = NULL;
1258 map.m_next_extent = NULL;
1259 map.m_seg_type = NO_CHECK_TYPE;
1260 last_lblk = F2FS_BLK_ALIGN(pos + len);
1262 while (map.m_lblk < last_lblk) {
1263 map.m_len = last_lblk - map.m_lblk;
1264 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1265 if (err || map.m_len == 0)
1267 map.m_lblk += map.m_len;
1272 static int __get_data_block(struct inode *inode, sector_t iblock,
1273 struct buffer_head *bh, int create, int flag,
1274 pgoff_t *next_pgofs, int seg_type)
1276 struct f2fs_map_blocks map;
1279 map.m_lblk = iblock;
1280 map.m_len = bh->b_size >> inode->i_blkbits;
1281 map.m_next_pgofs = next_pgofs;
1282 map.m_next_extent = NULL;
1283 map.m_seg_type = seg_type;
1285 err = f2fs_map_blocks(inode, &map, create, flag);
1287 map_bh(bh, inode->i_sb, map.m_pblk);
1288 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
1289 bh->b_size = (u64)map.m_len << inode->i_blkbits;
1294 static int get_data_block(struct inode *inode, sector_t iblock,
1295 struct buffer_head *bh_result, int create, int flag,
1296 pgoff_t *next_pgofs)
1298 return __get_data_block(inode, iblock, bh_result, create,
1303 static int get_data_block_dio(struct inode *inode, sector_t iblock,
1304 struct buffer_head *bh_result, int create)
1306 return __get_data_block(inode, iblock, bh_result, create,
1307 F2FS_GET_BLOCK_DIO, NULL,
1308 f2fs_rw_hint_to_seg_type(
1309 inode->i_write_hint));
1312 static int get_data_block_bmap(struct inode *inode, sector_t iblock,
1313 struct buffer_head *bh_result, int create)
1315 /* Block number less than F2FS MAX BLOCKS */
1316 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
1319 return __get_data_block(inode, iblock, bh_result, create,
1320 F2FS_GET_BLOCK_BMAP, NULL,
1324 static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1326 return (offset >> inode->i_blkbits);
1329 static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1331 return (blk << inode->i_blkbits);
1334 static int f2fs_xattr_fiemap(struct inode *inode,
1335 struct fiemap_extent_info *fieinfo)
1337 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1339 struct node_info ni;
1340 __u64 phys = 0, len;
1342 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1345 if (f2fs_has_inline_xattr(inode)) {
1348 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1349 inode->i_ino, false);
1353 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1355 f2fs_put_page(page, 1);
1359 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1360 offset = offsetof(struct f2fs_inode, i_addr) +
1361 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
1362 get_inline_xattr_addrs(inode));
1365 len = inline_xattr_size(inode);
1367 f2fs_put_page(page, 1);
1369 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1372 flags |= FIEMAP_EXTENT_LAST;
1374 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1375 if (err || err == 1)
1380 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1384 err = f2fs_get_node_info(sbi, xnid, &ni);
1386 f2fs_put_page(page, 1);
1390 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1391 len = inode->i_sb->s_blocksize;
1393 f2fs_put_page(page, 1);
1395 flags = FIEMAP_EXTENT_LAST;
1399 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1401 return (err < 0 ? err : 0);
1404 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1407 struct buffer_head map_bh;
1408 sector_t start_blk, last_blk;
1410 u64 logical = 0, phys = 0, size = 0;
1414 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1415 ret = f2fs_precache_extents(inode);
1420 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
1426 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1427 ret = f2fs_xattr_fiemap(inode, fieinfo);
1431 if (f2fs_has_inline_data(inode)) {
1432 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1437 if (logical_to_blk(inode, len) == 0)
1438 len = blk_to_logical(inode, 1);
1440 start_blk = logical_to_blk(inode, start);
1441 last_blk = logical_to_blk(inode, start + len - 1);
1444 memset(&map_bh, 0, sizeof(struct buffer_head));
1445 map_bh.b_size = len;
1447 ret = get_data_block(inode, start_blk, &map_bh, 0,
1448 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
1453 if (!buffer_mapped(&map_bh)) {
1454 start_blk = next_pgofs;
1456 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
1457 F2FS_I_SB(inode)->max_file_blocks))
1460 flags |= FIEMAP_EXTENT_LAST;
1464 if (f2fs_encrypted_inode(inode))
1465 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1467 ret = fiemap_fill_next_extent(fieinfo, logical,
1471 if (start_blk > last_blk || ret)
1474 logical = blk_to_logical(inode, start_blk);
1475 phys = blk_to_logical(inode, map_bh.b_blocknr);
1476 size = map_bh.b_size;
1478 if (buffer_unwritten(&map_bh))
1479 flags = FIEMAP_EXTENT_UNWRITTEN;
1481 start_blk += logical_to_blk(inode, size);
1485 if (fatal_signal_pending(current))
1493 inode_unlock(inode);
1498 * This function was originally taken from fs/mpage.c, and customized for f2fs.
1499 * Major change was from block_size == page_size in f2fs by default.
1501 * Note that the aops->readpages() function is ONLY used for read-ahead. If
1502 * this function ever deviates from doing just read-ahead, it should either
1503 * use ->readpage() or do the necessary surgery to decouple ->readpages()
1506 static int f2fs_mpage_readpages(struct address_space *mapping,
1507 struct list_head *pages, struct page *page,
1508 unsigned nr_pages, bool is_readahead)
1510 struct bio *bio = NULL;
1511 sector_t last_block_in_bio = 0;
1512 struct inode *inode = mapping->host;
1513 const unsigned blkbits = inode->i_blkbits;
1514 const unsigned blocksize = 1 << blkbits;
1515 sector_t block_in_file;
1516 sector_t last_block;
1517 sector_t last_block_in_file;
1519 struct f2fs_map_blocks map;
1525 map.m_next_pgofs = NULL;
1526 map.m_next_extent = NULL;
1527 map.m_seg_type = NO_CHECK_TYPE;
1529 for (; nr_pages; nr_pages--) {
1531 page = list_last_entry(pages, struct page, lru);
1533 prefetchw(&page->flags);
1534 list_del(&page->lru);
1535 if (add_to_page_cache_lru(page, mapping,
1537 readahead_gfp_mask(mapping)))
1541 block_in_file = (sector_t)page->index;
1542 last_block = block_in_file + nr_pages;
1543 last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
1545 if (last_block > last_block_in_file)
1546 last_block = last_block_in_file;
1549 * Map blocks using the previous result first.
1551 if ((map.m_flags & F2FS_MAP_MAPPED) &&
1552 block_in_file > map.m_lblk &&
1553 block_in_file < (map.m_lblk + map.m_len))
1557 * Then do more f2fs_map_blocks() calls until we are
1558 * done with this page.
1562 if (block_in_file < last_block) {
1563 map.m_lblk = block_in_file;
1564 map.m_len = last_block - block_in_file;
1566 if (f2fs_map_blocks(inode, &map, 0,
1567 F2FS_GET_BLOCK_DEFAULT))
1568 goto set_error_page;
1571 if ((map.m_flags & F2FS_MAP_MAPPED)) {
1572 block_nr = map.m_pblk + block_in_file - map.m_lblk;
1573 SetPageMappedToDisk(page);
1575 if (!PageUptodate(page) && !cleancache_get_page(page)) {
1576 SetPageUptodate(page);
1580 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
1582 goto set_error_page;
1584 zero_user_segment(page, 0, PAGE_SIZE);
1585 if (!PageUptodate(page))
1586 SetPageUptodate(page);
1592 * This page will go to BIO. Do we need to send this
1595 if (bio && (last_block_in_bio != block_nr - 1 ||
1596 !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) {
1598 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1602 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
1603 is_readahead ? REQ_RAHEAD : 0);
1606 goto set_error_page;
1611 * If the page is under writeback, we need to wait for
1612 * its completion to see the correct decrypted data.
1614 f2fs_wait_on_block_writeback(inode, block_nr);
1616 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
1617 goto submit_and_realloc;
1619 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
1620 ClearPageError(page);
1621 last_block_in_bio = block_nr;
1625 zero_user_segment(page, 0, PAGE_SIZE);
1630 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1638 BUG_ON(pages && !list_empty(pages));
1640 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1644 static int f2fs_read_data_page(struct file *file, struct page *page)
1646 struct inode *inode = page->mapping->host;
1649 trace_f2fs_readpage(page, DATA);
1651 /* If the file has inline data, try to read it directly */
1652 if (f2fs_has_inline_data(inode))
1653 ret = f2fs_read_inline_data(inode, page);
1655 ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1, false);
1659 static int f2fs_read_data_pages(struct file *file,
1660 struct address_space *mapping,
1661 struct list_head *pages, unsigned nr_pages)
1663 struct inode *inode = mapping->host;
1664 struct page *page = list_last_entry(pages, struct page, lru);
1666 trace_f2fs_readpages(inode, page, nr_pages);
1668 /* If the file has inline data, skip readpages */
1669 if (f2fs_has_inline_data(inode))
1672 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
1675 static int encrypt_one_page(struct f2fs_io_info *fio)
1677 struct inode *inode = fio->page->mapping->host;
1679 gfp_t gfp_flags = GFP_NOFS;
1681 if (!f2fs_encrypted_file(inode))
1684 /* wait for GCed page writeback via META_MAPPING */
1685 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
1688 fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page,
1689 PAGE_SIZE, 0, fio->page->index, gfp_flags);
1690 if (IS_ERR(fio->encrypted_page)) {
1691 /* flush pending IOs and wait for a while in the ENOMEM case */
1692 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
1693 f2fs_flush_merged_writes(fio->sbi);
1694 congestion_wait(BLK_RW_ASYNC, HZ/50);
1695 gfp_flags |= __GFP_NOFAIL;
1698 return PTR_ERR(fio->encrypted_page);
1701 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
1703 if (PageUptodate(mpage))
1704 memcpy(page_address(mpage),
1705 page_address(fio->encrypted_page), PAGE_SIZE);
1706 f2fs_put_page(mpage, 1);
1711 static inline bool check_inplace_update_policy(struct inode *inode,
1712 struct f2fs_io_info *fio)
1714 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1715 unsigned int policy = SM_I(sbi)->ipu_policy;
1717 if (policy & (0x1 << F2FS_IPU_FORCE))
1719 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
1721 if (policy & (0x1 << F2FS_IPU_UTIL) &&
1722 utilization(sbi) > SM_I(sbi)->min_ipu_util)
1724 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
1725 utilization(sbi) > SM_I(sbi)->min_ipu_util)
1729 * IPU for rewrite async pages
1731 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
1732 fio && fio->op == REQ_OP_WRITE &&
1733 !(fio->op_flags & REQ_SYNC) &&
1734 !f2fs_encrypted_inode(inode))
1737 /* this is only set during fdatasync */
1738 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
1739 is_inode_flag_set(inode, FI_NEED_IPU))
1742 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
1743 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
1749 bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
1751 if (f2fs_is_pinned_file(inode))
1754 /* if this is cold file, we should overwrite to avoid fragmentation */
1755 if (file_is_cold(inode))
1758 return check_inplace_update_policy(inode, fio);
1761 bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
1763 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1765 if (test_opt(sbi, LFS))
1767 if (S_ISDIR(inode->i_mode))
1769 if (IS_NOQUOTA(inode))
1771 if (f2fs_is_atomic_file(inode))
1774 if (is_cold_data(fio->page))
1776 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
1778 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
1779 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
1785 static inline bool need_inplace_update(struct f2fs_io_info *fio)
1787 struct inode *inode = fio->page->mapping->host;
1789 if (f2fs_should_update_outplace(inode, fio))
1792 return f2fs_should_update_inplace(inode, fio);
1795 int f2fs_do_write_data_page(struct f2fs_io_info *fio)
1797 struct page *page = fio->page;
1798 struct inode *inode = page->mapping->host;
1799 struct dnode_of_data dn;
1800 struct extent_info ei = {0,0,0};
1801 struct node_info ni;
1802 bool ipu_force = false;
1805 set_new_dnode(&dn, inode, NULL, NULL, 0);
1806 if (need_inplace_update(fio) &&
1807 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
1808 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
1810 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
1815 fio->need_lock = LOCK_DONE;
1819 /* Deadlock due to between page->lock and f2fs_lock_op */
1820 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
1823 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
1827 fio->old_blkaddr = dn.data_blkaddr;
1829 /* This page is already truncated */
1830 if (fio->old_blkaddr == NULL_ADDR) {
1831 ClearPageUptodate(page);
1832 clear_cold_data(page);
1836 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
1837 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
1843 * If current allocation needs SSR,
1844 * it had better in-place writes for updated data.
1846 if (ipu_force || (is_valid_data_blkaddr(fio->sbi, fio->old_blkaddr) &&
1847 need_inplace_update(fio))) {
1848 err = encrypt_one_page(fio);
1852 set_page_writeback(page);
1853 ClearPageError(page);
1854 f2fs_put_dnode(&dn);
1855 if (fio->need_lock == LOCK_REQ)
1856 f2fs_unlock_op(fio->sbi);
1857 err = f2fs_inplace_write_data(fio);
1858 trace_f2fs_do_write_data_page(fio->page, IPU);
1859 set_inode_flag(inode, FI_UPDATE_WRITE);
1863 if (fio->need_lock == LOCK_RETRY) {
1864 if (!f2fs_trylock_op(fio->sbi)) {
1868 fio->need_lock = LOCK_REQ;
1871 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
1875 fio->version = ni.version;
1877 err = encrypt_one_page(fio);
1881 set_page_writeback(page);
1882 ClearPageError(page);
1884 /* LFS mode write path */
1885 f2fs_outplace_write_data(&dn, fio);
1886 trace_f2fs_do_write_data_page(page, OPU);
1887 set_inode_flag(inode, FI_APPEND_WRITE);
1888 if (page->index == 0)
1889 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
1891 f2fs_put_dnode(&dn);
1893 if (fio->need_lock == LOCK_REQ)
1894 f2fs_unlock_op(fio->sbi);
1898 static int __write_data_page(struct page *page, bool *submitted,
1899 struct writeback_control *wbc,
1900 enum iostat_type io_type)
1902 struct inode *inode = page->mapping->host;
1903 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1904 loff_t i_size = i_size_read(inode);
1905 const pgoff_t end_index = ((unsigned long long) i_size)
1907 loff_t psize = (page->index + 1) << PAGE_SHIFT;
1908 unsigned offset = 0;
1909 bool need_balance_fs = false;
1911 struct f2fs_io_info fio = {
1913 .ino = inode->i_ino,
1916 .op_flags = wbc_to_write_flags(wbc),
1917 .old_blkaddr = NULL_ADDR,
1919 .encrypted_page = NULL,
1921 .need_lock = LOCK_RETRY,
1926 trace_f2fs_writepage(page, DATA);
1928 /* we should bypass data pages to proceed the kworkder jobs */
1929 if (unlikely(f2fs_cp_error(sbi))) {
1930 mapping_set_error(page->mapping, -EIO);
1932 * don't drop any dirty dentry pages for keeping lastest
1933 * directory structure.
1935 if (S_ISDIR(inode->i_mode))
1940 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1943 if (page->index < end_index)
1947 * If the offset is out-of-range of file size,
1948 * this page does not have to be written to disk.
1950 offset = i_size & (PAGE_SIZE - 1);
1951 if ((page->index >= end_index + 1) || !offset)
1954 zero_user_segment(page, offset, PAGE_SIZE);
1956 if (f2fs_is_drop_cache(inode))
1958 /* we should not write 0'th page having journal header */
1959 if (f2fs_is_volatile_file(inode) && (!page->index ||
1960 (!wbc->for_reclaim &&
1961 f2fs_available_free_memory(sbi, BASE_CHECK))))
1964 /* Dentry blocks are controlled by checkpoint */
1965 if (S_ISDIR(inode->i_mode)) {
1966 fio.need_lock = LOCK_DONE;
1967 err = f2fs_do_write_data_page(&fio);
1971 if (!wbc->for_reclaim)
1972 need_balance_fs = true;
1973 else if (has_not_enough_free_secs(sbi, 0, 0))
1976 set_inode_flag(inode, FI_HOT_DATA);
1979 if (f2fs_has_inline_data(inode)) {
1980 err = f2fs_write_inline_data(inode, page);
1985 if (err == -EAGAIN) {
1986 err = f2fs_do_write_data_page(&fio);
1987 if (err == -EAGAIN) {
1988 fio.need_lock = LOCK_REQ;
1989 err = f2fs_do_write_data_page(&fio);
1994 file_set_keep_isize(inode);
1996 down_write(&F2FS_I(inode)->i_sem);
1997 if (F2FS_I(inode)->last_disk_size < psize)
1998 F2FS_I(inode)->last_disk_size = psize;
1999 up_write(&F2FS_I(inode)->i_sem);
2003 if (err && err != -ENOENT)
2007 inode_dec_dirty_pages(inode);
2009 ClearPageUptodate(page);
2010 clear_cold_data(page);
2013 if (wbc->for_reclaim) {
2014 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
2015 clear_inode_flag(inode, FI_HOT_DATA);
2016 f2fs_remove_dirty_inode(inode);
2021 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode))
2022 f2fs_balance_fs(sbi, need_balance_fs);
2024 if (unlikely(f2fs_cp_error(sbi))) {
2025 f2fs_submit_merged_write(sbi, DATA);
2030 *submitted = fio.submitted;
2035 redirty_page_for_writepage(wbc, page);
2037 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2038 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2039 * file_write_and_wait_range() will see EIO error, which is critical
2040 * to return value of fsync() followed by atomic_write failure to user.
2042 if (!err || wbc->for_reclaim)
2043 return AOP_WRITEPAGE_ACTIVATE;
2048 static int f2fs_write_data_page(struct page *page,
2049 struct writeback_control *wbc)
2051 return __write_data_page(page, NULL, wbc, FS_DATA_IO);
2055 * This function was copied from write_cche_pages from mm/page-writeback.c.
2056 * The major change is making write step of cold data page separately from
2057 * warm/hot data page.
2059 static int f2fs_write_cache_pages(struct address_space *mapping,
2060 struct writeback_control *wbc,
2061 enum iostat_type io_type)
2065 struct pagevec pvec;
2066 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
2068 pgoff_t uninitialized_var(writeback_index);
2070 pgoff_t end; /* Inclusive */
2073 int range_whole = 0;
2077 pagevec_init(&pvec);
2079 if (get_dirty_pages(mapping->host) <=
2080 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2081 set_inode_flag(mapping->host, FI_HOT_DATA);
2083 clear_inode_flag(mapping->host, FI_HOT_DATA);
2085 if (wbc->range_cyclic) {
2086 writeback_index = mapping->writeback_index; /* prev offset */
2087 index = writeback_index;
2094 index = wbc->range_start >> PAGE_SHIFT;
2095 end = wbc->range_end >> PAGE_SHIFT;
2096 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2098 cycled = 1; /* ignore range_cyclic tests */
2100 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2101 tag = PAGECACHE_TAG_TOWRITE;
2103 tag = PAGECACHE_TAG_DIRTY;
2105 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2106 tag_pages_for_writeback(mapping, index, end);
2108 while (!done && (index <= end)) {
2111 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
2116 for (i = 0; i < nr_pages; i++) {
2117 struct page *page = pvec.pages[i];
2118 bool submitted = false;
2120 /* give a priority to WB_SYNC threads */
2121 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
2122 wbc->sync_mode == WB_SYNC_NONE) {
2127 done_index = page->index;
2131 if (unlikely(page->mapping != mapping)) {
2137 if (!PageDirty(page)) {
2138 /* someone wrote it for us */
2139 goto continue_unlock;
2142 if (PageWriteback(page)) {
2143 if (wbc->sync_mode != WB_SYNC_NONE)
2144 f2fs_wait_on_page_writeback(page,
2147 goto continue_unlock;
2150 BUG_ON(PageWriteback(page));
2151 if (!clear_page_dirty_for_io(page))
2152 goto continue_unlock;
2154 ret = __write_data_page(page, &submitted, wbc, io_type);
2155 if (unlikely(ret)) {
2157 * keep nr_to_write, since vfs uses this to
2158 * get # of written pages.
2160 if (ret == AOP_WRITEPAGE_ACTIVATE) {
2164 } else if (ret == -EAGAIN) {
2166 if (wbc->sync_mode == WB_SYNC_ALL) {
2168 congestion_wait(BLK_RW_ASYNC,
2174 done_index = page->index + 1;
2177 } else if (submitted) {
2181 if (--wbc->nr_to_write <= 0 &&
2182 wbc->sync_mode == WB_SYNC_NONE) {
2187 pagevec_release(&pvec);
2191 if (!cycled && !done) {
2194 end = writeback_index - 1;
2197 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
2198 mapping->writeback_index = done_index;
2201 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
2207 static inline bool __should_serialize_io(struct inode *inode,
2208 struct writeback_control *wbc)
2210 if (!S_ISREG(inode->i_mode))
2212 if (IS_NOQUOTA(inode))
2214 if (wbc->sync_mode != WB_SYNC_ALL)
2216 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
2221 static int __f2fs_write_data_pages(struct address_space *mapping,
2222 struct writeback_control *wbc,
2223 enum iostat_type io_type)
2225 struct inode *inode = mapping->host;
2226 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2227 struct blk_plug plug;
2229 bool locked = false;
2231 /* deal with chardevs and other special file */
2232 if (!mapping->a_ops->writepage)
2235 /* skip writing if there is no dirty page in this inode */
2236 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
2239 /* during POR, we don't need to trigger writepage at all. */
2240 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2243 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
2244 wbc->sync_mode == WB_SYNC_NONE &&
2245 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
2246 f2fs_available_free_memory(sbi, DIRTY_DENTS))
2249 /* skip writing during file defragment */
2250 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
2253 trace_f2fs_writepages(mapping->host, wbc, DATA);
2255 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
2256 if (wbc->sync_mode == WB_SYNC_ALL)
2257 atomic_inc(&sbi->wb_sync_req[DATA]);
2258 else if (atomic_read(&sbi->wb_sync_req[DATA]))
2261 if (__should_serialize_io(inode, wbc)) {
2262 mutex_lock(&sbi->writepages);
2266 blk_start_plug(&plug);
2267 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
2268 blk_finish_plug(&plug);
2271 mutex_unlock(&sbi->writepages);
2273 if (wbc->sync_mode == WB_SYNC_ALL)
2274 atomic_dec(&sbi->wb_sync_req[DATA]);
2276 * if some pages were truncated, we cannot guarantee its mapping->host
2277 * to detect pending bios.
2280 f2fs_remove_dirty_inode(inode);
2284 wbc->pages_skipped += get_dirty_pages(inode);
2285 trace_f2fs_writepages(mapping->host, wbc, DATA);
2289 static int f2fs_write_data_pages(struct address_space *mapping,
2290 struct writeback_control *wbc)
2292 struct inode *inode = mapping->host;
2294 return __f2fs_write_data_pages(mapping, wbc,
2295 F2FS_I(inode)->cp_task == current ?
2296 FS_CP_DATA_IO : FS_DATA_IO);
2299 static void f2fs_write_failed(struct address_space *mapping, loff_t to)
2301 struct inode *inode = mapping->host;
2302 loff_t i_size = i_size_read(inode);
2305 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
2306 down_write(&F2FS_I(inode)->i_mmap_sem);
2308 truncate_pagecache(inode, i_size);
2309 f2fs_truncate_blocks(inode, i_size, true, true);
2311 up_write(&F2FS_I(inode)->i_mmap_sem);
2312 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
2316 static int prepare_write_begin(struct f2fs_sb_info *sbi,
2317 struct page *page, loff_t pos, unsigned len,
2318 block_t *blk_addr, bool *node_changed)
2320 struct inode *inode = page->mapping->host;
2321 pgoff_t index = page->index;
2322 struct dnode_of_data dn;
2324 bool locked = false;
2325 struct extent_info ei = {0,0,0};
2329 * we already allocated all the blocks, so we don't need to get
2330 * the block addresses when there is no need to fill the page.
2332 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
2333 !is_inode_flag_set(inode, FI_NO_PREALLOC))
2336 if (f2fs_has_inline_data(inode) ||
2337 (pos & PAGE_MASK) >= i_size_read(inode)) {
2338 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true);
2342 /* check inline_data */
2343 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2344 if (IS_ERR(ipage)) {
2345 err = PTR_ERR(ipage);
2349 set_new_dnode(&dn, inode, ipage, ipage, 0);
2351 if (f2fs_has_inline_data(inode)) {
2352 if (pos + len <= MAX_INLINE_DATA(inode)) {
2353 f2fs_do_read_inline_data(page, ipage);
2354 set_inode_flag(inode, FI_DATA_EXIST);
2356 set_inline_node(ipage);
2358 err = f2fs_convert_inline_page(&dn, page);
2361 if (dn.data_blkaddr == NULL_ADDR)
2362 err = f2fs_get_block(&dn, index);
2364 } else if (locked) {
2365 err = f2fs_get_block(&dn, index);
2367 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
2368 dn.data_blkaddr = ei.blk + index - ei.fofs;
2371 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
2372 if (err || dn.data_blkaddr == NULL_ADDR) {
2373 f2fs_put_dnode(&dn);
2374 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
2382 /* convert_inline_page can make node_changed */
2383 *blk_addr = dn.data_blkaddr;
2384 *node_changed = dn.node_changed;
2386 f2fs_put_dnode(&dn);
2389 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false);
2393 static int f2fs_write_begin(struct file *file, struct address_space *mapping,
2394 loff_t pos, unsigned len, unsigned flags,
2395 struct page **pagep, void **fsdata)
2397 struct inode *inode = mapping->host;
2398 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2399 struct page *page = NULL;
2400 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
2401 bool need_balance = false, drop_atomic = false;
2402 block_t blkaddr = NULL_ADDR;
2405 trace_f2fs_write_begin(inode, pos, len, flags);
2407 err = f2fs_is_checkpoint_ready(sbi);
2411 if ((f2fs_is_atomic_file(inode) &&
2412 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
2413 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
2420 * We should check this at this moment to avoid deadlock on inode page
2421 * and #0 page. The locking rule for inline_data conversion should be:
2422 * lock_page(page #0) -> lock_page(inode_page)
2425 err = f2fs_convert_inline_inode(inode);
2431 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
2432 * wait_for_stable_page. Will wait that below with our IO control.
2434 page = f2fs_pagecache_get_page(mapping, index,
2435 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
2443 err = prepare_write_begin(sbi, page, pos, len,
2444 &blkaddr, &need_balance);
2448 if (need_balance && !IS_NOQUOTA(inode) &&
2449 has_not_enough_free_secs(sbi, 0, 0)) {
2451 f2fs_balance_fs(sbi, true);
2453 if (page->mapping != mapping) {
2454 /* The page got truncated from under us */
2455 f2fs_put_page(page, 1);
2460 f2fs_wait_on_page_writeback(page, DATA, false);
2462 if (len == PAGE_SIZE || PageUptodate(page))
2465 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) {
2466 zero_user_segment(page, len, PAGE_SIZE);
2470 if (blkaddr == NEW_ADDR) {
2471 zero_user_segment(page, 0, PAGE_SIZE);
2472 SetPageUptodate(page);
2474 err = f2fs_submit_page_read(inode, page, blkaddr);
2479 if (unlikely(page->mapping != mapping)) {
2480 f2fs_put_page(page, 1);
2483 if (unlikely(!PageUptodate(page))) {
2491 f2fs_put_page(page, 1);
2492 f2fs_write_failed(mapping, pos + len);
2494 f2fs_drop_inmem_pages_all(sbi, false);
2498 static int f2fs_write_end(struct file *file,
2499 struct address_space *mapping,
2500 loff_t pos, unsigned len, unsigned copied,
2501 struct page *page, void *fsdata)
2503 struct inode *inode = page->mapping->host;
2505 trace_f2fs_write_end(inode, pos, len, copied);
2508 * This should be come from len == PAGE_SIZE, and we expect copied
2509 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
2510 * let generic_perform_write() try to copy data again through copied=0.
2512 if (!PageUptodate(page)) {
2513 if (unlikely(copied != len))
2516 SetPageUptodate(page);
2521 set_page_dirty(page);
2523 if (pos + copied > i_size_read(inode))
2524 f2fs_i_size_write(inode, pos + copied);
2526 f2fs_put_page(page, 1);
2527 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2531 static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
2534 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
2535 unsigned blkbits = i_blkbits;
2536 unsigned blocksize_mask = (1 << blkbits) - 1;
2537 unsigned long align = offset | iov_iter_alignment(iter);
2538 struct block_device *bdev = inode->i_sb->s_bdev;
2540 if (align & blocksize_mask) {
2542 blkbits = blksize_bits(bdev_logical_block_size(bdev));
2543 blocksize_mask = (1 << blkbits) - 1;
2544 if (align & blocksize_mask)
2551 static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
2553 struct address_space *mapping = iocb->ki_filp->f_mapping;
2554 struct inode *inode = mapping->host;
2555 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2556 struct f2fs_inode_info *fi = F2FS_I(inode);
2557 size_t count = iov_iter_count(iter);
2558 loff_t offset = iocb->ki_pos;
2559 int rw = iov_iter_rw(iter);
2561 enum rw_hint hint = iocb->ki_hint;
2562 int whint_mode = F2FS_OPTION(sbi).whint_mode;
2565 err = check_direct_IO(inode, iter, offset);
2567 return err < 0 ? err : 0;
2569 if (f2fs_force_buffered_io(inode, iocb, iter))
2572 do_opu = allow_outplace_dio(inode, iocb, iter);
2574 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
2576 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
2577 iocb->ki_hint = WRITE_LIFE_NOT_SET;
2579 if (iocb->ki_flags & IOCB_NOWAIT) {
2580 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
2581 iocb->ki_hint = hint;
2585 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
2586 up_read(&fi->i_gc_rwsem[rw]);
2587 iocb->ki_hint = hint;
2592 down_read(&fi->i_gc_rwsem[rw]);
2594 down_read(&fi->i_gc_rwsem[READ]);
2597 err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio);
2600 up_read(&fi->i_gc_rwsem[READ]);
2602 up_read(&fi->i_gc_rwsem[rw]);
2605 if (whint_mode == WHINT_MODE_OFF)
2606 iocb->ki_hint = hint;
2608 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
2611 set_inode_flag(inode, FI_UPDATE_WRITE);
2612 } else if (err < 0) {
2613 f2fs_write_failed(mapping, offset + count);
2618 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
2623 void f2fs_invalidate_page(struct page *page, unsigned int offset,
2624 unsigned int length)
2626 struct inode *inode = page->mapping->host;
2627 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2629 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
2630 (offset % PAGE_SIZE || length != PAGE_SIZE))
2633 if (PageDirty(page)) {
2634 if (inode->i_ino == F2FS_META_INO(sbi)) {
2635 dec_page_count(sbi, F2FS_DIRTY_META);
2636 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
2637 dec_page_count(sbi, F2FS_DIRTY_NODES);
2639 inode_dec_dirty_pages(inode);
2640 f2fs_remove_dirty_inode(inode);
2644 clear_cold_data(page);
2646 /* This is atomic written page, keep Private */
2647 if (IS_ATOMIC_WRITTEN_PAGE(page))
2648 return f2fs_drop_inmem_page(inode, page);
2650 set_page_private(page, 0);
2651 ClearPagePrivate(page);
2654 int f2fs_release_page(struct page *page, gfp_t wait)
2656 /* If this is dirty page, keep PagePrivate */
2657 if (PageDirty(page))
2660 /* This is atomic written page, keep Private */
2661 if (IS_ATOMIC_WRITTEN_PAGE(page))
2664 clear_cold_data(page);
2665 set_page_private(page, 0);
2666 ClearPagePrivate(page);
2670 static int f2fs_set_data_page_dirty(struct page *page)
2672 struct address_space *mapping = page->mapping;
2673 struct inode *inode = mapping->host;
2675 trace_f2fs_set_page_dirty(page, DATA);
2677 if (!PageUptodate(page))
2678 SetPageUptodate(page);
2680 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
2681 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
2682 f2fs_register_inmem_page(inode, page);
2686 * Previously, this page has been registered, we just
2692 if (!PageDirty(page)) {
2693 __set_page_dirty_nobuffers(page);
2694 f2fs_update_dirty_page(inode, page);
2700 static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
2702 struct inode *inode = mapping->host;
2704 if (f2fs_has_inline_data(inode))
2707 /* make sure allocating whole blocks */
2708 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
2709 filemap_write_and_wait(mapping);
2711 return generic_block_bmap(mapping, block, get_data_block_bmap);
2714 #ifdef CONFIG_MIGRATION
2715 #include <linux/migrate.h>
2717 int f2fs_migrate_page(struct address_space *mapping,
2718 struct page *newpage, struct page *page, enum migrate_mode mode)
2720 int rc, extra_count;
2721 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
2722 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
2724 BUG_ON(PageWriteback(page));
2726 /* migrating an atomic written page is safe with the inmem_lock hold */
2727 if (atomic_written) {
2728 if (mode != MIGRATE_SYNC)
2730 if (!mutex_trylock(&fi->inmem_lock))
2735 * A reference is expected if PagePrivate set when move mapping,
2736 * however F2FS breaks this for maintaining dirty page counts when
2737 * truncating pages. So here adjusting the 'extra_count' make it work.
2739 extra_count = (atomic_written ? 1 : 0) - page_has_private(page);
2740 rc = migrate_page_move_mapping(mapping, newpage,
2741 page, NULL, mode, extra_count);
2742 if (rc != MIGRATEPAGE_SUCCESS) {
2744 mutex_unlock(&fi->inmem_lock);
2748 if (atomic_written) {
2749 struct inmem_pages *cur;
2750 list_for_each_entry(cur, &fi->inmem_pages, list)
2751 if (cur->page == page) {
2752 cur->page = newpage;
2755 mutex_unlock(&fi->inmem_lock);
2760 if (PagePrivate(page))
2761 SetPagePrivate(newpage);
2762 set_page_private(newpage, page_private(page));
2764 if (mode != MIGRATE_SYNC_NO_COPY)
2765 migrate_page_copy(newpage, page);
2767 migrate_page_states(newpage, page);
2769 return MIGRATEPAGE_SUCCESS;
2773 const struct address_space_operations f2fs_dblock_aops = {
2774 .readpage = f2fs_read_data_page,
2775 .readpages = f2fs_read_data_pages,
2776 .writepage = f2fs_write_data_page,
2777 .writepages = f2fs_write_data_pages,
2778 .write_begin = f2fs_write_begin,
2779 .write_end = f2fs_write_end,
2780 .set_page_dirty = f2fs_set_data_page_dirty,
2781 .invalidatepage = f2fs_invalidate_page,
2782 .releasepage = f2fs_release_page,
2783 .direct_IO = f2fs_direct_IO,
2785 #ifdef CONFIG_MIGRATION
2786 .migratepage = f2fs_migrate_page,
2790 void f2fs_clear_radix_tree_dirty_tag(struct page *page)
2792 struct address_space *mapping = page_mapping(page);
2793 unsigned long flags;
2795 xa_lock_irqsave(&mapping->i_pages, flags);
2796 radix_tree_tag_clear(&mapping->i_pages, page_index(page),
2797 PAGECACHE_TAG_DIRTY);
2798 xa_unlock_irqrestore(&mapping->i_pages, flags);
2801 int __init f2fs_init_post_read_processing(void)
2803 bio_post_read_ctx_cache = KMEM_CACHE(bio_post_read_ctx, 0);
2804 if (!bio_post_read_ctx_cache)
2806 bio_post_read_ctx_pool =
2807 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
2808 bio_post_read_ctx_cache);
2809 if (!bio_post_read_ctx_pool)
2810 goto fail_free_cache;
2814 kmem_cache_destroy(bio_post_read_ctx_cache);
2819 void __exit f2fs_destroy_post_read_processing(void)
2821 mempool_destroy(bio_post_read_ctx_pool);
2822 kmem_cache_destroy(bio_post_read_ctx_cache);