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)
89 struct bvec_iter_all iter_all;
91 bio_for_each_segment_all(bv, bio, iter_all) {
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;
166 struct bvec_iter_all iter_all;
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, iter_all) {
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 if (f2fs_is_multi_device(sbi)) {
222 for (i = 0; i < sbi->s_ndevs; i++) {
223 if (FDEV(i).start_blk <= blk_addr &&
224 FDEV(i).end_blk >= blk_addr) {
225 blk_addr -= FDEV(i).start_blk;
232 bio_set_dev(bio, bdev);
233 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
238 int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
242 if (!f2fs_is_multi_device(sbi))
245 for (i = 0; i < sbi->s_ndevs; i++)
246 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
251 static bool __same_bdev(struct f2fs_sb_info *sbi,
252 block_t blk_addr, struct bio *bio)
254 struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
255 return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
259 * Low-level block read/write IO operations.
261 static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr,
262 struct writeback_control *wbc,
263 int npages, bool is_read,
264 enum page_type type, enum temp_type temp)
268 bio = f2fs_bio_alloc(sbi, npages, true);
270 f2fs_target_device(sbi, blk_addr, bio);
272 bio->bi_end_io = f2fs_read_end_io;
273 bio->bi_private = NULL;
275 bio->bi_end_io = f2fs_write_end_io;
276 bio->bi_private = sbi;
277 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, type, temp);
280 wbc_init_bio(wbc, bio);
285 static inline void __submit_bio(struct f2fs_sb_info *sbi,
286 struct bio *bio, enum page_type type)
288 if (!is_read_io(bio_op(bio))) {
291 if (type != DATA && type != NODE)
294 if (test_opt(sbi, LFS) && current->plug)
295 blk_finish_plug(current->plug);
297 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
298 start %= F2FS_IO_SIZE(sbi);
303 /* fill dummy pages */
304 for (; start < F2FS_IO_SIZE(sbi); start++) {
306 mempool_alloc(sbi->write_io_dummy,
307 GFP_NOIO | __GFP_NOFAIL);
308 f2fs_bug_on(sbi, !page);
310 zero_user_segment(page, 0, PAGE_SIZE);
311 SetPagePrivate(page);
312 set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
314 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
318 * In the NODE case, we lose next block address chain. So, we
319 * need to do checkpoint in f2fs_sync_file.
322 set_sbi_flag(sbi, SBI_NEED_CP);
325 if (is_read_io(bio_op(bio)))
326 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
328 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
332 static void __submit_merged_bio(struct f2fs_bio_info *io)
334 struct f2fs_io_info *fio = &io->fio;
339 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
341 if (is_read_io(fio->op))
342 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
344 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
346 __submit_bio(io->sbi, io->bio, fio->type);
350 static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
351 struct page *page, nid_t ino)
353 struct bio_vec *bvec;
355 struct bvec_iter_all iter_all;
360 if (!inode && !page && !ino)
363 bio_for_each_segment_all(bvec, io->bio, iter_all) {
365 if (bvec->bv_page->mapping)
366 target = bvec->bv_page;
368 target = fscrypt_control_page(bvec->bv_page);
370 if (inode && inode == target->mapping->host)
372 if (page && page == target)
374 if (ino && ino == ino_of_node(target))
381 static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
382 enum page_type type, enum temp_type temp)
384 enum page_type btype = PAGE_TYPE_OF_BIO(type);
385 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
387 down_write(&io->io_rwsem);
389 /* change META to META_FLUSH in the checkpoint procedure */
390 if (type >= META_FLUSH) {
391 io->fio.type = META_FLUSH;
392 io->fio.op = REQ_OP_WRITE;
393 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
394 if (!test_opt(sbi, NOBARRIER))
395 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
397 __submit_merged_bio(io);
398 up_write(&io->io_rwsem);
401 static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
402 struct inode *inode, struct page *page,
403 nid_t ino, enum page_type type, bool force)
408 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
410 enum page_type btype = PAGE_TYPE_OF_BIO(type);
411 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
413 down_read(&io->io_rwsem);
414 ret = __has_merged_page(io, inode, page, ino);
415 up_read(&io->io_rwsem);
418 __f2fs_submit_merged_write(sbi, type, temp);
420 /* TODO: use HOT temp only for meta pages now. */
426 void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
428 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
431 void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
432 struct inode *inode, struct page *page,
433 nid_t ino, enum page_type type)
435 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
438 void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
440 f2fs_submit_merged_write(sbi, DATA);
441 f2fs_submit_merged_write(sbi, NODE);
442 f2fs_submit_merged_write(sbi, META);
446 * Fill the locked page with data located in the block address.
447 * A caller needs to unlock the page on failure.
449 int f2fs_submit_page_bio(struct f2fs_io_info *fio)
452 struct page *page = fio->encrypted_page ?
453 fio->encrypted_page : fio->page;
455 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
456 fio->is_por ? META_POR : (__is_meta_io(fio) ?
457 META_GENERIC : DATA_GENERIC_ENHANCE)))
460 trace_f2fs_submit_page_bio(page, fio);
461 f2fs_trace_ios(fio, 0);
463 /* Allocate a new bio */
464 bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc,
465 1, is_read_io(fio->op), fio->type, fio->temp);
467 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
472 if (fio->io_wbc && !is_read_io(fio->op))
473 wbc_account_io(fio->io_wbc, page, PAGE_SIZE);
475 bio_set_op_attrs(bio, fio->op, fio->op_flags);
477 inc_page_count(fio->sbi, is_read_io(fio->op) ?
478 __read_io_type(page): WB_DATA_TYPE(fio->page));
480 __submit_bio(fio->sbi, bio, fio->type);
484 void f2fs_submit_page_write(struct f2fs_io_info *fio)
486 struct f2fs_sb_info *sbi = fio->sbi;
487 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
488 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
489 struct page *bio_page;
491 f2fs_bug_on(sbi, is_read_io(fio->op));
493 down_write(&io->io_rwsem);
496 spin_lock(&io->io_lock);
497 if (list_empty(&io->io_list)) {
498 spin_unlock(&io->io_lock);
501 fio = list_first_entry(&io->io_list,
502 struct f2fs_io_info, list);
503 list_del(&fio->list);
504 spin_unlock(&io->io_lock);
507 verify_fio_blkaddr(fio);
509 bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
511 /* set submitted = true as a return value */
512 fio->submitted = true;
514 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
516 if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 ||
517 (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) ||
518 !__same_bdev(sbi, fio->new_blkaddr, io->bio)))
519 __submit_merged_bio(io);
521 if (io->bio == NULL) {
522 if ((fio->type == DATA || fio->type == NODE) &&
523 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
524 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
528 io->bio = __bio_alloc(sbi, fio->new_blkaddr, fio->io_wbc,
529 BIO_MAX_PAGES, false,
530 fio->type, fio->temp);
534 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
535 __submit_merged_bio(io);
540 wbc_account_io(fio->io_wbc, bio_page, PAGE_SIZE);
542 io->last_block_in_bio = fio->new_blkaddr;
543 f2fs_trace_ios(fio, 0);
545 trace_f2fs_submit_page_write(fio->page, fio);
550 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
551 f2fs_is_checkpoint_ready(sbi))
552 __submit_merged_bio(io);
553 up_write(&io->io_rwsem);
556 static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
557 unsigned nr_pages, unsigned op_flag)
559 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
561 struct bio_post_read_ctx *ctx;
562 unsigned int post_read_steps = 0;
564 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
566 return ERR_PTR(-ENOMEM);
567 f2fs_target_device(sbi, blkaddr, bio);
568 bio->bi_end_io = f2fs_read_end_io;
569 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
571 if (f2fs_encrypted_file(inode))
572 post_read_steps |= 1 << STEP_DECRYPT;
573 if (post_read_steps) {
574 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
577 return ERR_PTR(-ENOMEM);
580 ctx->enabled_steps = post_read_steps;
581 bio->bi_private = ctx;
587 /* This can handle encryption stuffs */
588 static int f2fs_submit_page_read(struct inode *inode, struct page *page,
591 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
594 bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0);
598 /* wait for GCed page writeback via META_MAPPING */
599 f2fs_wait_on_block_writeback(inode, blkaddr);
601 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
605 ClearPageError(page);
606 inc_page_count(sbi, F2FS_RD_DATA);
607 __submit_bio(sbi, bio, DATA);
611 static void __set_data_blkaddr(struct dnode_of_data *dn)
613 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
617 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
618 base = get_extra_isize(dn->inode);
620 /* Get physical address of data block */
621 addr_array = blkaddr_in_node(rn);
622 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
626 * Lock ordering for the change of data block address:
629 * update block addresses in the node page
631 void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
633 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
634 __set_data_blkaddr(dn);
635 if (set_page_dirty(dn->node_page))
636 dn->node_changed = true;
639 void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
641 dn->data_blkaddr = blkaddr;
642 f2fs_set_data_blkaddr(dn);
643 f2fs_update_extent_cache(dn);
646 /* dn->ofs_in_node will be returned with up-to-date last block pointer */
647 int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
649 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
655 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
657 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
660 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
661 dn->ofs_in_node, count);
663 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
665 for (; count > 0; dn->ofs_in_node++) {
666 block_t blkaddr = datablock_addr(dn->inode,
667 dn->node_page, dn->ofs_in_node);
668 if (blkaddr == NULL_ADDR) {
669 dn->data_blkaddr = NEW_ADDR;
670 __set_data_blkaddr(dn);
675 if (set_page_dirty(dn->node_page))
676 dn->node_changed = true;
680 /* Should keep dn->ofs_in_node unchanged */
681 int f2fs_reserve_new_block(struct dnode_of_data *dn)
683 unsigned int ofs_in_node = dn->ofs_in_node;
686 ret = f2fs_reserve_new_blocks(dn, 1);
687 dn->ofs_in_node = ofs_in_node;
691 int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
693 bool need_put = dn->inode_page ? false : true;
696 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
700 if (dn->data_blkaddr == NULL_ADDR)
701 err = f2fs_reserve_new_block(dn);
707 int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
709 struct extent_info ei = {0,0,0};
710 struct inode *inode = dn->inode;
712 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
713 dn->data_blkaddr = ei.blk + index - ei.fofs;
717 return f2fs_reserve_block(dn, index);
720 struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
721 int op_flags, bool for_write)
723 struct address_space *mapping = inode->i_mapping;
724 struct dnode_of_data dn;
726 struct extent_info ei = {0,0,0};
729 page = f2fs_grab_cache_page(mapping, index, for_write);
731 return ERR_PTR(-ENOMEM);
733 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
734 dn.data_blkaddr = ei.blk + index - ei.fofs;
735 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
736 DATA_GENERIC_ENHANCE_READ)) {
743 set_new_dnode(&dn, inode, NULL, NULL, 0);
744 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
749 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
753 if (dn.data_blkaddr != NEW_ADDR &&
754 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
756 DATA_GENERIC_ENHANCE)) {
761 if (PageUptodate(page)) {
767 * A new dentry page is allocated but not able to be written, since its
768 * new inode page couldn't be allocated due to -ENOSPC.
769 * In such the case, its blkaddr can be remained as NEW_ADDR.
770 * see, f2fs_add_link -> f2fs_get_new_data_page ->
771 * f2fs_init_inode_metadata.
773 if (dn.data_blkaddr == NEW_ADDR) {
774 zero_user_segment(page, 0, PAGE_SIZE);
775 if (!PageUptodate(page))
776 SetPageUptodate(page);
781 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr);
787 f2fs_put_page(page, 1);
791 struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
793 struct address_space *mapping = inode->i_mapping;
796 page = find_get_page(mapping, index);
797 if (page && PageUptodate(page))
799 f2fs_put_page(page, 0);
801 page = f2fs_get_read_data_page(inode, index, 0, false);
805 if (PageUptodate(page))
808 wait_on_page_locked(page);
809 if (unlikely(!PageUptodate(page))) {
810 f2fs_put_page(page, 0);
811 return ERR_PTR(-EIO);
817 * If it tries to access a hole, return an error.
818 * Because, the callers, functions in dir.c and GC, should be able to know
819 * whether this page exists or not.
821 struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
824 struct address_space *mapping = inode->i_mapping;
827 page = f2fs_get_read_data_page(inode, index, 0, for_write);
831 /* wait for read completion */
833 if (unlikely(page->mapping != mapping)) {
834 f2fs_put_page(page, 1);
837 if (unlikely(!PageUptodate(page))) {
838 f2fs_put_page(page, 1);
839 return ERR_PTR(-EIO);
845 * Caller ensures that this data page is never allocated.
846 * A new zero-filled data page is allocated in the page cache.
848 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
850 * Note that, ipage is set only by make_empty_dir, and if any error occur,
851 * ipage should be released by this function.
853 struct page *f2fs_get_new_data_page(struct inode *inode,
854 struct page *ipage, pgoff_t index, bool new_i_size)
856 struct address_space *mapping = inode->i_mapping;
858 struct dnode_of_data dn;
861 page = f2fs_grab_cache_page(mapping, index, true);
864 * before exiting, we should make sure ipage will be released
865 * if any error occur.
867 f2fs_put_page(ipage, 1);
868 return ERR_PTR(-ENOMEM);
871 set_new_dnode(&dn, inode, ipage, NULL, 0);
872 err = f2fs_reserve_block(&dn, index);
874 f2fs_put_page(page, 1);
880 if (PageUptodate(page))
883 if (dn.data_blkaddr == NEW_ADDR) {
884 zero_user_segment(page, 0, PAGE_SIZE);
885 if (!PageUptodate(page))
886 SetPageUptodate(page);
888 f2fs_put_page(page, 1);
890 /* if ipage exists, blkaddr should be NEW_ADDR */
891 f2fs_bug_on(F2FS_I_SB(inode), ipage);
892 page = f2fs_get_lock_data_page(inode, index, true);
897 if (new_i_size && i_size_read(inode) <
898 ((loff_t)(index + 1) << PAGE_SHIFT))
899 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
903 static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
905 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
906 struct f2fs_summary sum;
912 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
915 err = f2fs_get_node_info(sbi, dn->nid, &ni);
919 dn->data_blkaddr = datablock_addr(dn->inode,
920 dn->node_page, dn->ofs_in_node);
921 if (dn->data_blkaddr != NULL_ADDR)
924 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
928 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
929 old_blkaddr = dn->data_blkaddr;
930 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
931 &sum, seg_type, NULL, false);
932 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
933 invalidate_mapping_pages(META_MAPPING(sbi),
934 old_blkaddr, old_blkaddr);
935 f2fs_set_data_blkaddr(dn);
938 * i_size will be updated by direct_IO. Otherwise, we'll get stale
939 * data from unwritten block via dio_read.
944 int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
946 struct inode *inode = file_inode(iocb->ki_filp);
947 struct f2fs_map_blocks map;
950 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
952 /* convert inline data for Direct I/O*/
954 err = f2fs_convert_inline_inode(inode);
959 if (direct_io && allow_outplace_dio(inode, iocb, from))
962 if (is_inode_flag_set(inode, FI_NO_PREALLOC))
965 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
966 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
967 if (map.m_len > map.m_lblk)
968 map.m_len -= map.m_lblk;
972 map.m_next_pgofs = NULL;
973 map.m_next_extent = NULL;
974 map.m_seg_type = NO_CHECK_TYPE;
975 map.m_may_create = true;
978 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
979 flag = f2fs_force_buffered_io(inode, iocb, from) ?
980 F2FS_GET_BLOCK_PRE_AIO :
981 F2FS_GET_BLOCK_PRE_DIO;
984 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
985 err = f2fs_convert_inline_inode(inode);
989 if (f2fs_has_inline_data(inode))
992 flag = F2FS_GET_BLOCK_PRE_AIO;
995 err = f2fs_map_blocks(inode, &map, 1, flag);
996 if (map.m_len > 0 && err == -ENOSPC) {
998 set_inode_flag(inode, FI_NO_PREALLOC);
1004 void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
1006 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1008 down_read(&sbi->node_change);
1010 up_read(&sbi->node_change);
1015 f2fs_unlock_op(sbi);
1020 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
1021 * f2fs_map_blocks structure.
1022 * If original data blocks are allocated, then give them to blockdev.
1024 * a. preallocate requested block addresses
1025 * b. do not use extent cache for better performance
1026 * c. give the block addresses to blockdev
1028 int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
1029 int create, int flag)
1031 unsigned int maxblocks = map->m_len;
1032 struct dnode_of_data dn;
1033 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1034 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
1035 pgoff_t pgofs, end_offset, end;
1036 int err = 0, ofs = 1;
1037 unsigned int ofs_in_node, last_ofs_in_node;
1039 struct extent_info ei = {0,0,0};
1041 unsigned int start_pgofs;
1049 /* it only supports block size == page size */
1050 pgofs = (pgoff_t)map->m_lblk;
1051 end = pgofs + maxblocks;
1053 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
1054 if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
1058 map->m_pblk = ei.blk + pgofs - ei.fofs;
1059 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1060 map->m_flags = F2FS_MAP_MAPPED;
1061 if (map->m_next_extent)
1062 *map->m_next_extent = pgofs + map->m_len;
1064 /* for hardware encryption, but to avoid potential issue in future */
1065 if (flag == F2FS_GET_BLOCK_DIO)
1066 f2fs_wait_on_block_writeback_range(inode,
1067 map->m_pblk, map->m_len);
1072 if (map->m_may_create)
1073 __do_map_lock(sbi, flag, true);
1075 /* When reading holes, we need its node page */
1076 set_new_dnode(&dn, inode, NULL, NULL, 0);
1077 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1079 if (flag == F2FS_GET_BLOCK_BMAP)
1081 if (err == -ENOENT) {
1083 if (map->m_next_pgofs)
1084 *map->m_next_pgofs =
1085 f2fs_get_next_page_offset(&dn, pgofs);
1086 if (map->m_next_extent)
1087 *map->m_next_extent =
1088 f2fs_get_next_page_offset(&dn, pgofs);
1093 start_pgofs = pgofs;
1095 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
1096 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1099 blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
1101 if (__is_valid_data_blkaddr(blkaddr) &&
1102 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
1107 if (__is_valid_data_blkaddr(blkaddr)) {
1108 /* use out-place-update for driect IO under LFS mode */
1109 if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
1110 map->m_may_create) {
1111 err = __allocate_data_block(&dn, map->m_seg_type);
1113 blkaddr = dn.data_blkaddr;
1114 set_inode_flag(inode, FI_APPEND_WRITE);
1119 if (unlikely(f2fs_cp_error(sbi))) {
1123 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1124 if (blkaddr == NULL_ADDR) {
1126 last_ofs_in_node = dn.ofs_in_node;
1129 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1130 flag != F2FS_GET_BLOCK_DIO);
1131 err = __allocate_data_block(&dn,
1134 set_inode_flag(inode, FI_APPEND_WRITE);
1138 map->m_flags |= F2FS_MAP_NEW;
1139 blkaddr = dn.data_blkaddr;
1141 if (flag == F2FS_GET_BLOCK_BMAP) {
1145 if (flag == F2FS_GET_BLOCK_PRECACHE)
1147 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1148 blkaddr == NULL_ADDR) {
1149 if (map->m_next_pgofs)
1150 *map->m_next_pgofs = pgofs + 1;
1153 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1154 /* for defragment case */
1155 if (map->m_next_pgofs)
1156 *map->m_next_pgofs = pgofs + 1;
1162 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1165 if (map->m_len == 0) {
1166 /* preallocated unwritten block should be mapped for fiemap. */
1167 if (blkaddr == NEW_ADDR)
1168 map->m_flags |= F2FS_MAP_UNWRITTEN;
1169 map->m_flags |= F2FS_MAP_MAPPED;
1171 map->m_pblk = blkaddr;
1173 } else if ((map->m_pblk != NEW_ADDR &&
1174 blkaddr == (map->m_pblk + ofs)) ||
1175 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
1176 flag == F2FS_GET_BLOCK_PRE_DIO) {
1187 /* preallocate blocks in batch for one dnode page */
1188 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1189 (pgofs == end || dn.ofs_in_node == end_offset)) {
1191 dn.ofs_in_node = ofs_in_node;
1192 err = f2fs_reserve_new_blocks(&dn, prealloc);
1196 map->m_len += dn.ofs_in_node - ofs_in_node;
1197 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1201 dn.ofs_in_node = end_offset;
1206 else if (dn.ofs_in_node < end_offset)
1209 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1210 if (map->m_flags & F2FS_MAP_MAPPED) {
1211 unsigned int ofs = start_pgofs - map->m_lblk;
1213 f2fs_update_extent_cache_range(&dn,
1214 start_pgofs, map->m_pblk + ofs,
1219 f2fs_put_dnode(&dn);
1221 if (map->m_may_create) {
1222 __do_map_lock(sbi, flag, false);
1223 f2fs_balance_fs(sbi, dn.node_changed);
1229 /* for hardware encryption, but to avoid potential issue in future */
1230 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1231 f2fs_wait_on_block_writeback_range(inode,
1232 map->m_pblk, map->m_len);
1234 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1235 if (map->m_flags & F2FS_MAP_MAPPED) {
1236 unsigned int ofs = start_pgofs - map->m_lblk;
1238 f2fs_update_extent_cache_range(&dn,
1239 start_pgofs, map->m_pblk + ofs,
1242 if (map->m_next_extent)
1243 *map->m_next_extent = pgofs + 1;
1245 f2fs_put_dnode(&dn);
1247 if (map->m_may_create) {
1248 __do_map_lock(sbi, flag, false);
1249 f2fs_balance_fs(sbi, dn.node_changed);
1252 trace_f2fs_map_blocks(inode, map, err);
1256 bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1258 struct f2fs_map_blocks map;
1262 if (pos + len > i_size_read(inode))
1265 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1266 map.m_next_pgofs = NULL;
1267 map.m_next_extent = NULL;
1268 map.m_seg_type = NO_CHECK_TYPE;
1269 map.m_may_create = false;
1270 last_lblk = F2FS_BLK_ALIGN(pos + len);
1272 while (map.m_lblk < last_lblk) {
1273 map.m_len = last_lblk - map.m_lblk;
1274 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1275 if (err || map.m_len == 0)
1277 map.m_lblk += map.m_len;
1282 static int __get_data_block(struct inode *inode, sector_t iblock,
1283 struct buffer_head *bh, int create, int flag,
1284 pgoff_t *next_pgofs, int seg_type, bool may_write)
1286 struct f2fs_map_blocks map;
1289 map.m_lblk = iblock;
1290 map.m_len = bh->b_size >> inode->i_blkbits;
1291 map.m_next_pgofs = next_pgofs;
1292 map.m_next_extent = NULL;
1293 map.m_seg_type = seg_type;
1294 map.m_may_create = may_write;
1296 err = f2fs_map_blocks(inode, &map, create, flag);
1298 map_bh(bh, inode->i_sb, map.m_pblk);
1299 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
1300 bh->b_size = (u64)map.m_len << inode->i_blkbits;
1305 static int get_data_block(struct inode *inode, sector_t iblock,
1306 struct buffer_head *bh_result, int create, int flag,
1307 pgoff_t *next_pgofs)
1309 return __get_data_block(inode, iblock, bh_result, create,
1311 NO_CHECK_TYPE, create);
1314 static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1315 struct buffer_head *bh_result, int create)
1317 return __get_data_block(inode, iblock, bh_result, create,
1318 F2FS_GET_BLOCK_DIO, NULL,
1319 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1323 static int get_data_block_dio(struct inode *inode, sector_t iblock,
1324 struct buffer_head *bh_result, int create)
1326 return __get_data_block(inode, iblock, bh_result, create,
1327 F2FS_GET_BLOCK_DIO, NULL,
1328 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1332 static int get_data_block_bmap(struct inode *inode, sector_t iblock,
1333 struct buffer_head *bh_result, int create)
1335 /* Block number less than F2FS MAX BLOCKS */
1336 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
1339 return __get_data_block(inode, iblock, bh_result, create,
1340 F2FS_GET_BLOCK_BMAP, NULL,
1341 NO_CHECK_TYPE, create);
1344 static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1346 return (offset >> inode->i_blkbits);
1349 static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1351 return (blk << inode->i_blkbits);
1354 static int f2fs_xattr_fiemap(struct inode *inode,
1355 struct fiemap_extent_info *fieinfo)
1357 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1359 struct node_info ni;
1360 __u64 phys = 0, len;
1362 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1365 if (f2fs_has_inline_xattr(inode)) {
1368 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1369 inode->i_ino, false);
1373 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1375 f2fs_put_page(page, 1);
1379 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1380 offset = offsetof(struct f2fs_inode, i_addr) +
1381 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
1382 get_inline_xattr_addrs(inode));
1385 len = inline_xattr_size(inode);
1387 f2fs_put_page(page, 1);
1389 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1392 flags |= FIEMAP_EXTENT_LAST;
1394 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1395 if (err || err == 1)
1400 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1404 err = f2fs_get_node_info(sbi, xnid, &ni);
1406 f2fs_put_page(page, 1);
1410 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1411 len = inode->i_sb->s_blocksize;
1413 f2fs_put_page(page, 1);
1415 flags = FIEMAP_EXTENT_LAST;
1419 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1421 return (err < 0 ? err : 0);
1424 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1427 struct buffer_head map_bh;
1428 sector_t start_blk, last_blk;
1430 u64 logical = 0, phys = 0, size = 0;
1434 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1435 ret = f2fs_precache_extents(inode);
1440 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
1446 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1447 ret = f2fs_xattr_fiemap(inode, fieinfo);
1451 if (f2fs_has_inline_data(inode)) {
1452 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1457 if (logical_to_blk(inode, len) == 0)
1458 len = blk_to_logical(inode, 1);
1460 start_blk = logical_to_blk(inode, start);
1461 last_blk = logical_to_blk(inode, start + len - 1);
1464 memset(&map_bh, 0, sizeof(struct buffer_head));
1465 map_bh.b_size = len;
1467 ret = get_data_block(inode, start_blk, &map_bh, 0,
1468 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
1473 if (!buffer_mapped(&map_bh)) {
1474 start_blk = next_pgofs;
1476 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
1477 F2FS_I_SB(inode)->max_file_blocks))
1480 flags |= FIEMAP_EXTENT_LAST;
1484 if (IS_ENCRYPTED(inode))
1485 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1487 ret = fiemap_fill_next_extent(fieinfo, logical,
1491 if (start_blk > last_blk || ret)
1494 logical = blk_to_logical(inode, start_blk);
1495 phys = blk_to_logical(inode, map_bh.b_blocknr);
1496 size = map_bh.b_size;
1498 if (buffer_unwritten(&map_bh))
1499 flags = FIEMAP_EXTENT_UNWRITTEN;
1501 start_blk += logical_to_blk(inode, size);
1505 if (fatal_signal_pending(current))
1513 inode_unlock(inode);
1517 static int f2fs_read_single_page(struct inode *inode, struct page *page,
1519 struct f2fs_map_blocks *map,
1520 struct bio **bio_ret,
1521 sector_t *last_block_in_bio,
1524 struct bio *bio = *bio_ret;
1525 const unsigned blkbits = inode->i_blkbits;
1526 const unsigned blocksize = 1 << blkbits;
1527 sector_t block_in_file;
1528 sector_t last_block;
1529 sector_t last_block_in_file;
1533 block_in_file = (sector_t)page->index;
1534 last_block = block_in_file + nr_pages;
1535 last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
1537 if (last_block > last_block_in_file)
1538 last_block = last_block_in_file;
1540 /* just zeroing out page which is beyond EOF */
1541 if (block_in_file >= last_block)
1544 * Map blocks using the previous result first.
1546 if ((map->m_flags & F2FS_MAP_MAPPED) &&
1547 block_in_file > map->m_lblk &&
1548 block_in_file < (map->m_lblk + map->m_len))
1552 * Then do more f2fs_map_blocks() calls until we are
1553 * done with this page.
1555 map->m_lblk = block_in_file;
1556 map->m_len = last_block - block_in_file;
1558 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
1562 if ((map->m_flags & F2FS_MAP_MAPPED)) {
1563 block_nr = map->m_pblk + block_in_file - map->m_lblk;
1564 SetPageMappedToDisk(page);
1566 if (!PageUptodate(page) && !cleancache_get_page(page)) {
1567 SetPageUptodate(page);
1571 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
1572 DATA_GENERIC_ENHANCE_READ)) {
1578 zero_user_segment(page, 0, PAGE_SIZE);
1579 if (!PageUptodate(page))
1580 SetPageUptodate(page);
1586 * This page will go to BIO. Do we need to send this
1589 if (bio && (*last_block_in_bio != block_nr - 1 ||
1590 !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) {
1592 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1596 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
1597 is_readahead ? REQ_RAHEAD : 0);
1606 * If the page is under writeback, we need to wait for
1607 * its completion to see the correct decrypted data.
1609 f2fs_wait_on_block_writeback(inode, block_nr);
1611 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
1612 goto submit_and_realloc;
1614 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
1615 ClearPageError(page);
1616 *last_block_in_bio = block_nr;
1620 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1630 * This function was originally taken from fs/mpage.c, and customized for f2fs.
1631 * Major change was from block_size == page_size in f2fs by default.
1633 * Note that the aops->readpages() function is ONLY used for read-ahead. If
1634 * this function ever deviates from doing just read-ahead, it should either
1635 * use ->readpage() or do the necessary surgery to decouple ->readpages()
1638 static int f2fs_mpage_readpages(struct address_space *mapping,
1639 struct list_head *pages, struct page *page,
1640 unsigned nr_pages, bool is_readahead)
1642 struct bio *bio = NULL;
1643 sector_t last_block_in_bio = 0;
1644 struct inode *inode = mapping->host;
1645 struct f2fs_map_blocks map;
1652 map.m_next_pgofs = NULL;
1653 map.m_next_extent = NULL;
1654 map.m_seg_type = NO_CHECK_TYPE;
1655 map.m_may_create = false;
1657 for (; nr_pages; nr_pages--) {
1659 page = list_last_entry(pages, struct page, lru);
1661 prefetchw(&page->flags);
1662 list_del(&page->lru);
1663 if (add_to_page_cache_lru(page, mapping,
1665 readahead_gfp_mask(mapping)))
1669 ret = f2fs_read_single_page(inode, page, nr_pages, &map, &bio,
1670 &last_block_in_bio, is_readahead);
1673 zero_user_segment(page, 0, PAGE_SIZE);
1680 BUG_ON(pages && !list_empty(pages));
1682 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1683 return pages ? 0 : ret;
1686 static int f2fs_read_data_page(struct file *file, struct page *page)
1688 struct inode *inode = page->mapping->host;
1691 trace_f2fs_readpage(page, DATA);
1693 /* If the file has inline data, try to read it directly */
1694 if (f2fs_has_inline_data(inode))
1695 ret = f2fs_read_inline_data(inode, page);
1697 ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1, false);
1701 static int f2fs_read_data_pages(struct file *file,
1702 struct address_space *mapping,
1703 struct list_head *pages, unsigned nr_pages)
1705 struct inode *inode = mapping->host;
1706 struct page *page = list_last_entry(pages, struct page, lru);
1708 trace_f2fs_readpages(inode, page, nr_pages);
1710 /* If the file has inline data, skip readpages */
1711 if (f2fs_has_inline_data(inode))
1714 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
1717 static int encrypt_one_page(struct f2fs_io_info *fio)
1719 struct inode *inode = fio->page->mapping->host;
1721 gfp_t gfp_flags = GFP_NOFS;
1723 if (!f2fs_encrypted_file(inode))
1726 /* wait for GCed page writeback via META_MAPPING */
1727 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
1730 fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page,
1731 PAGE_SIZE, 0, fio->page->index, gfp_flags);
1732 if (IS_ERR(fio->encrypted_page)) {
1733 /* flush pending IOs and wait for a while in the ENOMEM case */
1734 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
1735 f2fs_flush_merged_writes(fio->sbi);
1736 congestion_wait(BLK_RW_ASYNC, HZ/50);
1737 gfp_flags |= __GFP_NOFAIL;
1740 return PTR_ERR(fio->encrypted_page);
1743 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
1745 if (PageUptodate(mpage))
1746 memcpy(page_address(mpage),
1747 page_address(fio->encrypted_page), PAGE_SIZE);
1748 f2fs_put_page(mpage, 1);
1753 static inline bool check_inplace_update_policy(struct inode *inode,
1754 struct f2fs_io_info *fio)
1756 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1757 unsigned int policy = SM_I(sbi)->ipu_policy;
1759 if (policy & (0x1 << F2FS_IPU_FORCE))
1761 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
1763 if (policy & (0x1 << F2FS_IPU_UTIL) &&
1764 utilization(sbi) > SM_I(sbi)->min_ipu_util)
1766 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
1767 utilization(sbi) > SM_I(sbi)->min_ipu_util)
1771 * IPU for rewrite async pages
1773 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
1774 fio && fio->op == REQ_OP_WRITE &&
1775 !(fio->op_flags & REQ_SYNC) &&
1776 !IS_ENCRYPTED(inode))
1779 /* this is only set during fdatasync */
1780 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
1781 is_inode_flag_set(inode, FI_NEED_IPU))
1784 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
1785 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
1791 bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
1793 if (f2fs_is_pinned_file(inode))
1796 /* if this is cold file, we should overwrite to avoid fragmentation */
1797 if (file_is_cold(inode))
1800 return check_inplace_update_policy(inode, fio);
1803 bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
1805 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1807 if (test_opt(sbi, LFS))
1809 if (S_ISDIR(inode->i_mode))
1811 if (IS_NOQUOTA(inode))
1813 if (f2fs_is_atomic_file(inode))
1816 if (is_cold_data(fio->page))
1818 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
1820 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
1821 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
1827 static inline bool need_inplace_update(struct f2fs_io_info *fio)
1829 struct inode *inode = fio->page->mapping->host;
1831 if (f2fs_should_update_outplace(inode, fio))
1834 return f2fs_should_update_inplace(inode, fio);
1837 int f2fs_do_write_data_page(struct f2fs_io_info *fio)
1839 struct page *page = fio->page;
1840 struct inode *inode = page->mapping->host;
1841 struct dnode_of_data dn;
1842 struct extent_info ei = {0,0,0};
1843 struct node_info ni;
1844 bool ipu_force = false;
1847 set_new_dnode(&dn, inode, NULL, NULL, 0);
1848 if (need_inplace_update(fio) &&
1849 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
1850 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
1852 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
1853 DATA_GENERIC_ENHANCE))
1857 fio->need_lock = LOCK_DONE;
1861 /* Deadlock due to between page->lock and f2fs_lock_op */
1862 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
1865 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
1869 fio->old_blkaddr = dn.data_blkaddr;
1871 /* This page is already truncated */
1872 if (fio->old_blkaddr == NULL_ADDR) {
1873 ClearPageUptodate(page);
1874 clear_cold_data(page);
1878 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
1879 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
1880 DATA_GENERIC_ENHANCE)) {
1885 * If current allocation needs SSR,
1886 * it had better in-place writes for updated data.
1889 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
1890 need_inplace_update(fio))) {
1891 err = encrypt_one_page(fio);
1895 set_page_writeback(page);
1896 ClearPageError(page);
1897 f2fs_put_dnode(&dn);
1898 if (fio->need_lock == LOCK_REQ)
1899 f2fs_unlock_op(fio->sbi);
1900 err = f2fs_inplace_write_data(fio);
1902 if (f2fs_encrypted_file(inode))
1903 fscrypt_pullback_bio_page(&fio->encrypted_page,
1905 if (PageWriteback(page))
1906 end_page_writeback(page);
1908 set_inode_flag(inode, FI_UPDATE_WRITE);
1910 trace_f2fs_do_write_data_page(fio->page, IPU);
1914 if (fio->need_lock == LOCK_RETRY) {
1915 if (!f2fs_trylock_op(fio->sbi)) {
1919 fio->need_lock = LOCK_REQ;
1922 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
1926 fio->version = ni.version;
1928 err = encrypt_one_page(fio);
1932 set_page_writeback(page);
1933 ClearPageError(page);
1935 /* LFS mode write path */
1936 f2fs_outplace_write_data(&dn, fio);
1937 trace_f2fs_do_write_data_page(page, OPU);
1938 set_inode_flag(inode, FI_APPEND_WRITE);
1939 if (page->index == 0)
1940 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
1942 f2fs_put_dnode(&dn);
1944 if (fio->need_lock == LOCK_REQ)
1945 f2fs_unlock_op(fio->sbi);
1949 static int __write_data_page(struct page *page, bool *submitted,
1950 struct writeback_control *wbc,
1951 enum iostat_type io_type)
1953 struct inode *inode = page->mapping->host;
1954 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1955 loff_t i_size = i_size_read(inode);
1956 const pgoff_t end_index = ((unsigned long long) i_size)
1958 loff_t psize = (page->index + 1) << PAGE_SHIFT;
1959 unsigned offset = 0;
1960 bool need_balance_fs = false;
1962 struct f2fs_io_info fio = {
1964 .ino = inode->i_ino,
1967 .op_flags = wbc_to_write_flags(wbc),
1968 .old_blkaddr = NULL_ADDR,
1970 .encrypted_page = NULL,
1972 .need_lock = LOCK_RETRY,
1977 trace_f2fs_writepage(page, DATA);
1979 /* we should bypass data pages to proceed the kworkder jobs */
1980 if (unlikely(f2fs_cp_error(sbi))) {
1981 mapping_set_error(page->mapping, -EIO);
1983 * don't drop any dirty dentry pages for keeping lastest
1984 * directory structure.
1986 if (S_ISDIR(inode->i_mode))
1991 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
1994 if (page->index < end_index)
1998 * If the offset is out-of-range of file size,
1999 * this page does not have to be written to disk.
2001 offset = i_size & (PAGE_SIZE - 1);
2002 if ((page->index >= end_index + 1) || !offset)
2005 zero_user_segment(page, offset, PAGE_SIZE);
2007 if (f2fs_is_drop_cache(inode))
2009 /* we should not write 0'th page having journal header */
2010 if (f2fs_is_volatile_file(inode) && (!page->index ||
2011 (!wbc->for_reclaim &&
2012 f2fs_available_free_memory(sbi, BASE_CHECK))))
2015 /* Dentry blocks are controlled by checkpoint */
2016 if (S_ISDIR(inode->i_mode)) {
2017 fio.need_lock = LOCK_DONE;
2018 err = f2fs_do_write_data_page(&fio);
2022 if (!wbc->for_reclaim)
2023 need_balance_fs = true;
2024 else if (has_not_enough_free_secs(sbi, 0, 0))
2027 set_inode_flag(inode, FI_HOT_DATA);
2030 if (f2fs_has_inline_data(inode)) {
2031 err = f2fs_write_inline_data(inode, page);
2036 if (err == -EAGAIN) {
2037 err = f2fs_do_write_data_page(&fio);
2038 if (err == -EAGAIN) {
2039 fio.need_lock = LOCK_REQ;
2040 err = f2fs_do_write_data_page(&fio);
2045 file_set_keep_isize(inode);
2047 down_write(&F2FS_I(inode)->i_sem);
2048 if (F2FS_I(inode)->last_disk_size < psize)
2049 F2FS_I(inode)->last_disk_size = psize;
2050 up_write(&F2FS_I(inode)->i_sem);
2054 if (err && err != -ENOENT)
2058 inode_dec_dirty_pages(inode);
2060 ClearPageUptodate(page);
2061 clear_cold_data(page);
2064 if (wbc->for_reclaim) {
2065 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
2066 clear_inode_flag(inode, FI_HOT_DATA);
2067 f2fs_remove_dirty_inode(inode);
2072 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
2073 !F2FS_I(inode)->cp_task)
2074 f2fs_balance_fs(sbi, need_balance_fs);
2076 if (unlikely(f2fs_cp_error(sbi))) {
2077 f2fs_submit_merged_write(sbi, DATA);
2082 *submitted = fio.submitted;
2087 redirty_page_for_writepage(wbc, page);
2089 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2090 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2091 * file_write_and_wait_range() will see EIO error, which is critical
2092 * to return value of fsync() followed by atomic_write failure to user.
2094 if (!err || wbc->for_reclaim)
2095 return AOP_WRITEPAGE_ACTIVATE;
2100 static int f2fs_write_data_page(struct page *page,
2101 struct writeback_control *wbc)
2103 return __write_data_page(page, NULL, wbc, FS_DATA_IO);
2107 * This function was copied from write_cche_pages from mm/page-writeback.c.
2108 * The major change is making write step of cold data page separately from
2109 * warm/hot data page.
2111 static int f2fs_write_cache_pages(struct address_space *mapping,
2112 struct writeback_control *wbc,
2113 enum iostat_type io_type)
2117 struct pagevec pvec;
2118 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
2120 pgoff_t uninitialized_var(writeback_index);
2122 pgoff_t end; /* Inclusive */
2125 int range_whole = 0;
2129 pagevec_init(&pvec);
2131 if (get_dirty_pages(mapping->host) <=
2132 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2133 set_inode_flag(mapping->host, FI_HOT_DATA);
2135 clear_inode_flag(mapping->host, FI_HOT_DATA);
2137 if (wbc->range_cyclic) {
2138 writeback_index = mapping->writeback_index; /* prev offset */
2139 index = writeback_index;
2146 index = wbc->range_start >> PAGE_SHIFT;
2147 end = wbc->range_end >> PAGE_SHIFT;
2148 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2150 cycled = 1; /* ignore range_cyclic tests */
2152 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2153 tag = PAGECACHE_TAG_TOWRITE;
2155 tag = PAGECACHE_TAG_DIRTY;
2157 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2158 tag_pages_for_writeback(mapping, index, end);
2160 while (!done && (index <= end)) {
2163 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
2168 for (i = 0; i < nr_pages; i++) {
2169 struct page *page = pvec.pages[i];
2170 bool submitted = false;
2172 /* give a priority to WB_SYNC threads */
2173 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
2174 wbc->sync_mode == WB_SYNC_NONE) {
2179 done_index = page->index;
2183 if (unlikely(page->mapping != mapping)) {
2189 if (!PageDirty(page)) {
2190 /* someone wrote it for us */
2191 goto continue_unlock;
2194 if (PageWriteback(page)) {
2195 if (wbc->sync_mode != WB_SYNC_NONE)
2196 f2fs_wait_on_page_writeback(page,
2199 goto continue_unlock;
2202 if (!clear_page_dirty_for_io(page))
2203 goto continue_unlock;
2205 ret = __write_data_page(page, &submitted, wbc, io_type);
2206 if (unlikely(ret)) {
2208 * keep nr_to_write, since vfs uses this to
2209 * get # of written pages.
2211 if (ret == AOP_WRITEPAGE_ACTIVATE) {
2215 } else if (ret == -EAGAIN) {
2217 if (wbc->sync_mode == WB_SYNC_ALL) {
2219 congestion_wait(BLK_RW_ASYNC,
2225 done_index = page->index + 1;
2228 } else if (submitted) {
2232 if (--wbc->nr_to_write <= 0 &&
2233 wbc->sync_mode == WB_SYNC_NONE) {
2238 pagevec_release(&pvec);
2242 if (!cycled && !done) {
2245 end = writeback_index - 1;
2248 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
2249 mapping->writeback_index = done_index;
2252 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
2258 static inline bool __should_serialize_io(struct inode *inode,
2259 struct writeback_control *wbc)
2261 if (!S_ISREG(inode->i_mode))
2263 if (IS_NOQUOTA(inode))
2265 if (wbc->sync_mode != WB_SYNC_ALL)
2267 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
2272 static int __f2fs_write_data_pages(struct address_space *mapping,
2273 struct writeback_control *wbc,
2274 enum iostat_type io_type)
2276 struct inode *inode = mapping->host;
2277 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2278 struct blk_plug plug;
2280 bool locked = false;
2282 /* deal with chardevs and other special file */
2283 if (!mapping->a_ops->writepage)
2286 /* skip writing if there is no dirty page in this inode */
2287 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
2290 /* during POR, we don't need to trigger writepage at all. */
2291 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2294 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
2295 wbc->sync_mode == WB_SYNC_NONE &&
2296 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
2297 f2fs_available_free_memory(sbi, DIRTY_DENTS))
2300 /* skip writing during file defragment */
2301 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
2304 trace_f2fs_writepages(mapping->host, wbc, DATA);
2306 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
2307 if (wbc->sync_mode == WB_SYNC_ALL)
2308 atomic_inc(&sbi->wb_sync_req[DATA]);
2309 else if (atomic_read(&sbi->wb_sync_req[DATA]))
2312 if (__should_serialize_io(inode, wbc)) {
2313 mutex_lock(&sbi->writepages);
2317 blk_start_plug(&plug);
2318 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
2319 blk_finish_plug(&plug);
2322 mutex_unlock(&sbi->writepages);
2324 if (wbc->sync_mode == WB_SYNC_ALL)
2325 atomic_dec(&sbi->wb_sync_req[DATA]);
2327 * if some pages were truncated, we cannot guarantee its mapping->host
2328 * to detect pending bios.
2331 f2fs_remove_dirty_inode(inode);
2335 wbc->pages_skipped += get_dirty_pages(inode);
2336 trace_f2fs_writepages(mapping->host, wbc, DATA);
2340 static int f2fs_write_data_pages(struct address_space *mapping,
2341 struct writeback_control *wbc)
2343 struct inode *inode = mapping->host;
2345 return __f2fs_write_data_pages(mapping, wbc,
2346 F2FS_I(inode)->cp_task == current ?
2347 FS_CP_DATA_IO : FS_DATA_IO);
2350 static void f2fs_write_failed(struct address_space *mapping, loff_t to)
2352 struct inode *inode = mapping->host;
2353 loff_t i_size = i_size_read(inode);
2356 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
2357 down_write(&F2FS_I(inode)->i_mmap_sem);
2359 truncate_pagecache(inode, i_size);
2360 if (!IS_NOQUOTA(inode))
2361 f2fs_truncate_blocks(inode, i_size, true);
2363 up_write(&F2FS_I(inode)->i_mmap_sem);
2364 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
2368 static int prepare_write_begin(struct f2fs_sb_info *sbi,
2369 struct page *page, loff_t pos, unsigned len,
2370 block_t *blk_addr, bool *node_changed)
2372 struct inode *inode = page->mapping->host;
2373 pgoff_t index = page->index;
2374 struct dnode_of_data dn;
2376 bool locked = false;
2377 struct extent_info ei = {0,0,0};
2382 * we already allocated all the blocks, so we don't need to get
2383 * the block addresses when there is no need to fill the page.
2385 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
2386 !is_inode_flag_set(inode, FI_NO_PREALLOC))
2389 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
2390 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
2391 flag = F2FS_GET_BLOCK_DEFAULT;
2393 flag = F2FS_GET_BLOCK_PRE_AIO;
2395 if (f2fs_has_inline_data(inode) ||
2396 (pos & PAGE_MASK) >= i_size_read(inode)) {
2397 __do_map_lock(sbi, flag, true);
2401 /* check inline_data */
2402 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2403 if (IS_ERR(ipage)) {
2404 err = PTR_ERR(ipage);
2408 set_new_dnode(&dn, inode, ipage, ipage, 0);
2410 if (f2fs_has_inline_data(inode)) {
2411 if (pos + len <= MAX_INLINE_DATA(inode)) {
2412 f2fs_do_read_inline_data(page, ipage);
2413 set_inode_flag(inode, FI_DATA_EXIST);
2415 set_inline_node(ipage);
2417 err = f2fs_convert_inline_page(&dn, page);
2420 if (dn.data_blkaddr == NULL_ADDR)
2421 err = f2fs_get_block(&dn, index);
2423 } else if (locked) {
2424 err = f2fs_get_block(&dn, index);
2426 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
2427 dn.data_blkaddr = ei.blk + index - ei.fofs;
2430 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
2431 if (err || dn.data_blkaddr == NULL_ADDR) {
2432 f2fs_put_dnode(&dn);
2433 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
2435 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
2442 /* convert_inline_page can make node_changed */
2443 *blk_addr = dn.data_blkaddr;
2444 *node_changed = dn.node_changed;
2446 f2fs_put_dnode(&dn);
2449 __do_map_lock(sbi, flag, false);
2453 static int f2fs_write_begin(struct file *file, struct address_space *mapping,
2454 loff_t pos, unsigned len, unsigned flags,
2455 struct page **pagep, void **fsdata)
2457 struct inode *inode = mapping->host;
2458 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2459 struct page *page = NULL;
2460 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
2461 bool need_balance = false, drop_atomic = false;
2462 block_t blkaddr = NULL_ADDR;
2465 trace_f2fs_write_begin(inode, pos, len, flags);
2467 err = f2fs_is_checkpoint_ready(sbi);
2471 if ((f2fs_is_atomic_file(inode) &&
2472 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
2473 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
2480 * We should check this at this moment to avoid deadlock on inode page
2481 * and #0 page. The locking rule for inline_data conversion should be:
2482 * lock_page(page #0) -> lock_page(inode_page)
2485 err = f2fs_convert_inline_inode(inode);
2491 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
2492 * wait_for_stable_page. Will wait that below with our IO control.
2494 page = f2fs_pagecache_get_page(mapping, index,
2495 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
2503 err = prepare_write_begin(sbi, page, pos, len,
2504 &blkaddr, &need_balance);
2508 if (need_balance && !IS_NOQUOTA(inode) &&
2509 has_not_enough_free_secs(sbi, 0, 0)) {
2511 f2fs_balance_fs(sbi, true);
2513 if (page->mapping != mapping) {
2514 /* The page got truncated from under us */
2515 f2fs_put_page(page, 1);
2520 f2fs_wait_on_page_writeback(page, DATA, false, true);
2522 if (len == PAGE_SIZE || PageUptodate(page))
2525 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) {
2526 zero_user_segment(page, len, PAGE_SIZE);
2530 if (blkaddr == NEW_ADDR) {
2531 zero_user_segment(page, 0, PAGE_SIZE);
2532 SetPageUptodate(page);
2534 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
2535 DATA_GENERIC_ENHANCE_READ)) {
2539 err = f2fs_submit_page_read(inode, page, blkaddr);
2544 if (unlikely(page->mapping != mapping)) {
2545 f2fs_put_page(page, 1);
2548 if (unlikely(!PageUptodate(page))) {
2556 f2fs_put_page(page, 1);
2557 f2fs_write_failed(mapping, pos + len);
2559 f2fs_drop_inmem_pages_all(sbi, false);
2563 static int f2fs_write_end(struct file *file,
2564 struct address_space *mapping,
2565 loff_t pos, unsigned len, unsigned copied,
2566 struct page *page, void *fsdata)
2568 struct inode *inode = page->mapping->host;
2570 trace_f2fs_write_end(inode, pos, len, copied);
2573 * This should be come from len == PAGE_SIZE, and we expect copied
2574 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
2575 * let generic_perform_write() try to copy data again through copied=0.
2577 if (!PageUptodate(page)) {
2578 if (unlikely(copied != len))
2581 SetPageUptodate(page);
2586 set_page_dirty(page);
2588 if (pos + copied > i_size_read(inode))
2589 f2fs_i_size_write(inode, pos + copied);
2591 f2fs_put_page(page, 1);
2592 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
2596 static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
2599 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
2600 unsigned blkbits = i_blkbits;
2601 unsigned blocksize_mask = (1 << blkbits) - 1;
2602 unsigned long align = offset | iov_iter_alignment(iter);
2603 struct block_device *bdev = inode->i_sb->s_bdev;
2605 if (align & blocksize_mask) {
2607 blkbits = blksize_bits(bdev_logical_block_size(bdev));
2608 blocksize_mask = (1 << blkbits) - 1;
2609 if (align & blocksize_mask)
2616 static void f2fs_dio_end_io(struct bio *bio)
2618 struct f2fs_private_dio *dio = bio->bi_private;
2620 dec_page_count(F2FS_I_SB(dio->inode),
2621 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
2623 bio->bi_private = dio->orig_private;
2624 bio->bi_end_io = dio->orig_end_io;
2631 static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
2634 struct f2fs_private_dio *dio;
2635 bool write = (bio_op(bio) == REQ_OP_WRITE);
2637 dio = f2fs_kzalloc(F2FS_I_SB(inode),
2638 sizeof(struct f2fs_private_dio), GFP_NOFS);
2643 dio->orig_end_io = bio->bi_end_io;
2644 dio->orig_private = bio->bi_private;
2647 bio->bi_end_io = f2fs_dio_end_io;
2648 bio->bi_private = dio;
2650 inc_page_count(F2FS_I_SB(inode),
2651 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
2656 bio->bi_status = BLK_STS_IOERR;
2660 static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
2662 struct address_space *mapping = iocb->ki_filp->f_mapping;
2663 struct inode *inode = mapping->host;
2664 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2665 struct f2fs_inode_info *fi = F2FS_I(inode);
2666 size_t count = iov_iter_count(iter);
2667 loff_t offset = iocb->ki_pos;
2668 int rw = iov_iter_rw(iter);
2670 enum rw_hint hint = iocb->ki_hint;
2671 int whint_mode = F2FS_OPTION(sbi).whint_mode;
2674 err = check_direct_IO(inode, iter, offset);
2676 return err < 0 ? err : 0;
2678 if (f2fs_force_buffered_io(inode, iocb, iter))
2681 do_opu = allow_outplace_dio(inode, iocb, iter);
2683 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
2685 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
2686 iocb->ki_hint = WRITE_LIFE_NOT_SET;
2688 if (iocb->ki_flags & IOCB_NOWAIT) {
2689 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
2690 iocb->ki_hint = hint;
2694 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
2695 up_read(&fi->i_gc_rwsem[rw]);
2696 iocb->ki_hint = hint;
2701 down_read(&fi->i_gc_rwsem[rw]);
2703 down_read(&fi->i_gc_rwsem[READ]);
2706 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
2707 iter, rw == WRITE ? get_data_block_dio_write :
2708 get_data_block_dio, NULL, f2fs_dio_submit_bio,
2709 DIO_LOCKING | DIO_SKIP_HOLES);
2712 up_read(&fi->i_gc_rwsem[READ]);
2714 up_read(&fi->i_gc_rwsem[rw]);
2717 if (whint_mode == WHINT_MODE_OFF)
2718 iocb->ki_hint = hint;
2720 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
2723 set_inode_flag(inode, FI_UPDATE_WRITE);
2724 } else if (err < 0) {
2725 f2fs_write_failed(mapping, offset + count);
2730 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
2735 void f2fs_invalidate_page(struct page *page, unsigned int offset,
2736 unsigned int length)
2738 struct inode *inode = page->mapping->host;
2739 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2741 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
2742 (offset % PAGE_SIZE || length != PAGE_SIZE))
2745 if (PageDirty(page)) {
2746 if (inode->i_ino == F2FS_META_INO(sbi)) {
2747 dec_page_count(sbi, F2FS_DIRTY_META);
2748 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
2749 dec_page_count(sbi, F2FS_DIRTY_NODES);
2751 inode_dec_dirty_pages(inode);
2752 f2fs_remove_dirty_inode(inode);
2756 clear_cold_data(page);
2758 if (IS_ATOMIC_WRITTEN_PAGE(page))
2759 return f2fs_drop_inmem_page(inode, page);
2761 f2fs_clear_page_private(page);
2764 int f2fs_release_page(struct page *page, gfp_t wait)
2766 /* If this is dirty page, keep PagePrivate */
2767 if (PageDirty(page))
2770 /* This is atomic written page, keep Private */
2771 if (IS_ATOMIC_WRITTEN_PAGE(page))
2774 clear_cold_data(page);
2775 f2fs_clear_page_private(page);
2779 static int f2fs_set_data_page_dirty(struct page *page)
2781 struct address_space *mapping = page->mapping;
2782 struct inode *inode = mapping->host;
2784 trace_f2fs_set_page_dirty(page, DATA);
2786 if (!PageUptodate(page))
2787 SetPageUptodate(page);
2789 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
2790 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
2791 f2fs_register_inmem_page(inode, page);
2795 * Previously, this page has been registered, we just
2801 if (!PageDirty(page)) {
2802 __set_page_dirty_nobuffers(page);
2803 f2fs_update_dirty_page(inode, page);
2809 static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
2811 struct inode *inode = mapping->host;
2813 if (f2fs_has_inline_data(inode))
2816 /* make sure allocating whole blocks */
2817 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
2818 filemap_write_and_wait(mapping);
2820 return generic_block_bmap(mapping, block, get_data_block_bmap);
2823 #ifdef CONFIG_MIGRATION
2824 #include <linux/migrate.h>
2826 int f2fs_migrate_page(struct address_space *mapping,
2827 struct page *newpage, struct page *page, enum migrate_mode mode)
2829 int rc, extra_count;
2830 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
2831 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
2833 BUG_ON(PageWriteback(page));
2835 /* migrating an atomic written page is safe with the inmem_lock hold */
2836 if (atomic_written) {
2837 if (mode != MIGRATE_SYNC)
2839 if (!mutex_trylock(&fi->inmem_lock))
2843 /* one extra reference was held for atomic_write page */
2844 extra_count = atomic_written ? 1 : 0;
2845 rc = migrate_page_move_mapping(mapping, newpage,
2846 page, mode, extra_count);
2847 if (rc != MIGRATEPAGE_SUCCESS) {
2849 mutex_unlock(&fi->inmem_lock);
2853 if (atomic_written) {
2854 struct inmem_pages *cur;
2855 list_for_each_entry(cur, &fi->inmem_pages, list)
2856 if (cur->page == page) {
2857 cur->page = newpage;
2860 mutex_unlock(&fi->inmem_lock);
2865 if (PagePrivate(page)) {
2866 f2fs_set_page_private(newpage, page_private(page));
2867 f2fs_clear_page_private(page);
2870 if (mode != MIGRATE_SYNC_NO_COPY)
2871 migrate_page_copy(newpage, page);
2873 migrate_page_states(newpage, page);
2875 return MIGRATEPAGE_SUCCESS;
2879 const struct address_space_operations f2fs_dblock_aops = {
2880 .readpage = f2fs_read_data_page,
2881 .readpages = f2fs_read_data_pages,
2882 .writepage = f2fs_write_data_page,
2883 .writepages = f2fs_write_data_pages,
2884 .write_begin = f2fs_write_begin,
2885 .write_end = f2fs_write_end,
2886 .set_page_dirty = f2fs_set_data_page_dirty,
2887 .invalidatepage = f2fs_invalidate_page,
2888 .releasepage = f2fs_release_page,
2889 .direct_IO = f2fs_direct_IO,
2891 #ifdef CONFIG_MIGRATION
2892 .migratepage = f2fs_migrate_page,
2896 void f2fs_clear_page_cache_dirty_tag(struct page *page)
2898 struct address_space *mapping = page_mapping(page);
2899 unsigned long flags;
2901 xa_lock_irqsave(&mapping->i_pages, flags);
2902 __xa_clear_mark(&mapping->i_pages, page_index(page),
2903 PAGECACHE_TAG_DIRTY);
2904 xa_unlock_irqrestore(&mapping->i_pages, flags);
2907 int __init f2fs_init_post_read_processing(void)
2909 bio_post_read_ctx_cache = KMEM_CACHE(bio_post_read_ctx, 0);
2910 if (!bio_post_read_ctx_cache)
2912 bio_post_read_ctx_pool =
2913 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
2914 bio_post_read_ctx_cache);
2915 if (!bio_post_read_ctx_pool)
2916 goto fail_free_cache;
2920 kmem_cache_destroy(bio_post_read_ctx_cache);
2925 void __exit f2fs_destroy_post_read_processing(void)
2927 mempool_destroy(bio_post_read_ctx_pool);
2928 kmem_cache_destroy(bio_post_read_ctx_cache);