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8#include <linux/fs.h>
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/blk-crypto.h>
18#include <linux/swap.h>
19#include <linux/prefetch.h>
20#include <linux/uio.h>
21#include <linux/cleancache.h>
22#include <linux/sched/signal.h>
23#include <linux/fiemap.h>
24
25#include "f2fs.h"
26#include "node.h"
27#include "segment.h"
28#include "iostat.h"
29#include <trace/events/f2fs.h>
30
31#define NUM_PREALLOC_POST_READ_CTXS 128
32
33static struct kmem_cache *bio_post_read_ctx_cache;
34static struct kmem_cache *bio_entry_slab;
35static mempool_t *bio_post_read_ctx_pool;
36static struct bio_set f2fs_bioset;
37
38#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
39
40int __init f2fs_init_bioset(void)
41{
42 if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
43 0, BIOSET_NEED_BVECS))
44 return -ENOMEM;
45 return 0;
46}
47
48void f2fs_destroy_bioset(void)
49{
50 bioset_exit(&f2fs_bioset);
51}
52
53static bool __is_cp_guaranteed(struct page *page)
54{
55 struct address_space *mapping = page->mapping;
56 struct inode *inode;
57 struct f2fs_sb_info *sbi;
58
59 if (!mapping)
60 return false;
61
62 inode = mapping->host;
63 sbi = F2FS_I_SB(inode);
64
65 if (inode->i_ino == F2FS_META_INO(sbi) ||
66 inode->i_ino == F2FS_NODE_INO(sbi) ||
67 S_ISDIR(inode->i_mode))
68 return true;
69
70 if (f2fs_is_compressed_page(page))
71 return false;
72 if ((S_ISREG(inode->i_mode) &&
73 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
74 page_private_gcing(page))
75 return true;
76 return false;
77}
78
79static enum count_type __read_io_type(struct page *page)
80{
81 struct address_space *mapping = page_file_mapping(page);
82
83 if (mapping) {
84 struct inode *inode = mapping->host;
85 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86
87 if (inode->i_ino == F2FS_META_INO(sbi))
88 return F2FS_RD_META;
89
90 if (inode->i_ino == F2FS_NODE_INO(sbi))
91 return F2FS_RD_NODE;
92 }
93 return F2FS_RD_DATA;
94}
95
96
97enum bio_post_read_step {
98#ifdef CONFIG_FS_ENCRYPTION
99 STEP_DECRYPT = 1 << 0,
100#else
101 STEP_DECRYPT = 0,
102#endif
103#ifdef CONFIG_F2FS_FS_COMPRESSION
104 STEP_DECOMPRESS = 1 << 1,
105#else
106 STEP_DECOMPRESS = 0,
107#endif
108#ifdef CONFIG_FS_VERITY
109 STEP_VERITY = 1 << 2,
110#else
111 STEP_VERITY = 0,
112#endif
113};
114
115struct bio_post_read_ctx {
116 struct bio *bio;
117 struct f2fs_sb_info *sbi;
118 struct work_struct work;
119 unsigned int enabled_steps;
120 block_t fs_blkaddr;
121};
122
123static void f2fs_finish_read_bio(struct bio *bio)
124{
125 struct bio_vec *bv;
126 struct bvec_iter_all iter_all;
127
128
129
130
131
132 bio_for_each_segment_all(bv, bio, iter_all) {
133 struct page *page = bv->bv_page;
134
135 if (f2fs_is_compressed_page(page)) {
136 if (bio->bi_status)
137 f2fs_end_read_compressed_page(page, true, 0);
138 f2fs_put_page_dic(page);
139 continue;
140 }
141
142
143 if (bio->bi_status || PageError(page)) {
144 ClearPageUptodate(page);
145
146 ClearPageError(page);
147 } else {
148 SetPageUptodate(page);
149 }
150 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
151 unlock_page(page);
152 }
153
154 if (bio->bi_private)
155 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
156 bio_put(bio);
157}
158
159static void f2fs_verify_bio(struct work_struct *work)
160{
161 struct bio_post_read_ctx *ctx =
162 container_of(work, struct bio_post_read_ctx, work);
163 struct bio *bio = ctx->bio;
164 bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS);
165
166
167
168
169
170
171
172
173 mempool_free(ctx, bio_post_read_ctx_pool);
174 bio->bi_private = NULL;
175
176
177
178
179
180 if (may_have_compressed_pages) {
181 struct bio_vec *bv;
182 struct bvec_iter_all iter_all;
183
184 bio_for_each_segment_all(bv, bio, iter_all) {
185 struct page *page = bv->bv_page;
186
187 if (!f2fs_is_compressed_page(page) &&
188 !PageError(page) && !fsverity_verify_page(page))
189 SetPageError(page);
190 }
191 } else {
192 fsverity_verify_bio(bio);
193 }
194
195 f2fs_finish_read_bio(bio);
196}
197
198
199
200
201
202
203
204
205
206
207static void f2fs_verify_and_finish_bio(struct bio *bio)
208{
209 struct bio_post_read_ctx *ctx = bio->bi_private;
210
211 if (ctx && (ctx->enabled_steps & STEP_VERITY)) {
212 INIT_WORK(&ctx->work, f2fs_verify_bio);
213 fsverity_enqueue_verify_work(&ctx->work);
214 } else {
215 f2fs_finish_read_bio(bio);
216 }
217}
218
219
220
221
222
223
224
225
226
227
228static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx)
229{
230 struct bio_vec *bv;
231 struct bvec_iter_all iter_all;
232 bool all_compressed = true;
233 block_t blkaddr = ctx->fs_blkaddr;
234
235 bio_for_each_segment_all(bv, ctx->bio, iter_all) {
236 struct page *page = bv->bv_page;
237
238
239 if (f2fs_is_compressed_page(page))
240 f2fs_end_read_compressed_page(page, PageError(page),
241 blkaddr);
242 else
243 all_compressed = false;
244
245 blkaddr++;
246 }
247
248
249
250
251
252
253 if (all_compressed)
254 ctx->enabled_steps &= ~STEP_VERITY;
255}
256
257static void f2fs_post_read_work(struct work_struct *work)
258{
259 struct bio_post_read_ctx *ctx =
260 container_of(work, struct bio_post_read_ctx, work);
261
262 if (ctx->enabled_steps & STEP_DECRYPT)
263 fscrypt_decrypt_bio(ctx->bio);
264
265 if (ctx->enabled_steps & STEP_DECOMPRESS)
266 f2fs_handle_step_decompress(ctx);
267
268 f2fs_verify_and_finish_bio(ctx->bio);
269}
270
271static void f2fs_read_end_io(struct bio *bio)
272{
273 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
274 struct bio_post_read_ctx *ctx;
275
276 iostat_update_and_unbind_ctx(bio, 0);
277 ctx = bio->bi_private;
278
279 if (time_to_inject(sbi, FAULT_READ_IO)) {
280 f2fs_show_injection_info(sbi, FAULT_READ_IO);
281 bio->bi_status = BLK_STS_IOERR;
282 }
283
284 if (bio->bi_status) {
285 f2fs_finish_read_bio(bio);
286 return;
287 }
288
289 if (ctx && (ctx->enabled_steps & (STEP_DECRYPT | STEP_DECOMPRESS))) {
290 INIT_WORK(&ctx->work, f2fs_post_read_work);
291 queue_work(ctx->sbi->post_read_wq, &ctx->work);
292 } else {
293 f2fs_verify_and_finish_bio(bio);
294 }
295}
296
297static void f2fs_write_end_io(struct bio *bio)
298{
299 struct f2fs_sb_info *sbi;
300 struct bio_vec *bvec;
301 struct bvec_iter_all iter_all;
302
303 iostat_update_and_unbind_ctx(bio, 1);
304 sbi = bio->bi_private;
305
306 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
307 f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
308 bio->bi_status = BLK_STS_IOERR;
309 }
310
311 bio_for_each_segment_all(bvec, bio, iter_all) {
312 struct page *page = bvec->bv_page;
313 enum count_type type = WB_DATA_TYPE(page);
314
315 if (page_private_dummy(page)) {
316 clear_page_private_dummy(page);
317 unlock_page(page);
318 mempool_free(page, sbi->write_io_dummy);
319
320 if (unlikely(bio->bi_status))
321 f2fs_stop_checkpoint(sbi, true);
322 continue;
323 }
324
325 fscrypt_finalize_bounce_page(&page);
326
327#ifdef CONFIG_F2FS_FS_COMPRESSION
328 if (f2fs_is_compressed_page(page)) {
329 f2fs_compress_write_end_io(bio, page);
330 continue;
331 }
332#endif
333
334 if (unlikely(bio->bi_status)) {
335 mapping_set_error(page->mapping, -EIO);
336 if (type == F2FS_WB_CP_DATA)
337 f2fs_stop_checkpoint(sbi, true);
338 }
339
340 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
341 page->index != nid_of_node(page));
342
343 dec_page_count(sbi, type);
344 if (f2fs_in_warm_node_list(sbi, page))
345 f2fs_del_fsync_node_entry(sbi, page);
346 clear_page_private_gcing(page);
347 end_page_writeback(page);
348 }
349 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
350 wq_has_sleeper(&sbi->cp_wait))
351 wake_up(&sbi->cp_wait);
352
353 bio_put(bio);
354}
355
356struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
357 block_t blk_addr, struct bio *bio)
358{
359 struct block_device *bdev = sbi->sb->s_bdev;
360 int i;
361
362 if (f2fs_is_multi_device(sbi)) {
363 for (i = 0; i < sbi->s_ndevs; i++) {
364 if (FDEV(i).start_blk <= blk_addr &&
365 FDEV(i).end_blk >= blk_addr) {
366 blk_addr -= FDEV(i).start_blk;
367 bdev = FDEV(i).bdev;
368 break;
369 }
370 }
371 }
372 if (bio) {
373 bio_set_dev(bio, bdev);
374 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
375 }
376 return bdev;
377}
378
379int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
380{
381 int i;
382
383 if (!f2fs_is_multi_device(sbi))
384 return 0;
385
386 for (i = 0; i < sbi->s_ndevs; i++)
387 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
388 return i;
389 return 0;
390}
391
392static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
393{
394 struct f2fs_sb_info *sbi = fio->sbi;
395 struct bio *bio;
396
397 bio = bio_alloc_bioset(GFP_NOIO, npages, &f2fs_bioset);
398
399 f2fs_target_device(sbi, fio->new_blkaddr, bio);
400 if (is_read_io(fio->op)) {
401 bio->bi_end_io = f2fs_read_end_io;
402 bio->bi_private = NULL;
403 } else {
404 bio->bi_end_io = f2fs_write_end_io;
405 bio->bi_private = sbi;
406 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
407 fio->type, fio->temp);
408 }
409 iostat_alloc_and_bind_ctx(sbi, bio, NULL);
410
411 if (fio->io_wbc)
412 wbc_init_bio(fio->io_wbc, bio);
413
414 return bio;
415}
416
417static void f2fs_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode,
418 pgoff_t first_idx,
419 const struct f2fs_io_info *fio,
420 gfp_t gfp_mask)
421{
422
423
424
425
426 if (!fio || !fio->encrypted_page)
427 fscrypt_set_bio_crypt_ctx(bio, inode, first_idx, gfp_mask);
428}
429
430static bool f2fs_crypt_mergeable_bio(struct bio *bio, const struct inode *inode,
431 pgoff_t next_idx,
432 const struct f2fs_io_info *fio)
433{
434
435
436
437
438 if (fio && fio->encrypted_page)
439 return !bio_has_crypt_ctx(bio);
440
441 return fscrypt_mergeable_bio(bio, inode, next_idx);
442}
443
444static inline void __submit_bio(struct f2fs_sb_info *sbi,
445 struct bio *bio, enum page_type type)
446{
447 if (!is_read_io(bio_op(bio))) {
448 unsigned int start;
449
450 if (type != DATA && type != NODE)
451 goto submit_io;
452
453 if (f2fs_lfs_mode(sbi) && current->plug)
454 blk_finish_plug(current->plug);
455
456 if (!F2FS_IO_ALIGNED(sbi))
457 goto submit_io;
458
459 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
460 start %= F2FS_IO_SIZE(sbi);
461
462 if (start == 0)
463 goto submit_io;
464
465
466 for (; start < F2FS_IO_SIZE(sbi); start++) {
467 struct page *page =
468 mempool_alloc(sbi->write_io_dummy,
469 GFP_NOIO | __GFP_NOFAIL);
470 f2fs_bug_on(sbi, !page);
471
472 lock_page(page);
473
474 zero_user_segment(page, 0, PAGE_SIZE);
475 set_page_private_dummy(page);
476
477 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
478 f2fs_bug_on(sbi, 1);
479 }
480
481
482
483
484 if (type == NODE)
485 set_sbi_flag(sbi, SBI_NEED_CP);
486 }
487submit_io:
488 if (is_read_io(bio_op(bio)))
489 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
490 else
491 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
492
493 iostat_update_submit_ctx(bio, type);
494 submit_bio(bio);
495}
496
497void f2fs_submit_bio(struct f2fs_sb_info *sbi,
498 struct bio *bio, enum page_type type)
499{
500 __submit_bio(sbi, bio, type);
501}
502
503static void __attach_io_flag(struct f2fs_io_info *fio)
504{
505 struct f2fs_sb_info *sbi = fio->sbi;
506 unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
507 unsigned int io_flag, fua_flag, meta_flag;
508
509 if (fio->type == DATA)
510 io_flag = sbi->data_io_flag;
511 else if (fio->type == NODE)
512 io_flag = sbi->node_io_flag;
513 else
514 return;
515
516 fua_flag = io_flag & temp_mask;
517 meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
518
519
520
521
522
523
524
525 if ((1 << fio->temp) & meta_flag)
526 fio->op_flags |= REQ_META;
527 if ((1 << fio->temp) & fua_flag)
528 fio->op_flags |= REQ_FUA;
529}
530
531static void __submit_merged_bio(struct f2fs_bio_info *io)
532{
533 struct f2fs_io_info *fio = &io->fio;
534
535 if (!io->bio)
536 return;
537
538 __attach_io_flag(fio);
539 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
540
541 if (is_read_io(fio->op))
542 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
543 else
544 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
545
546 __submit_bio(io->sbi, io->bio, fio->type);
547 io->bio = NULL;
548}
549
550static bool __has_merged_page(struct bio *bio, struct inode *inode,
551 struct page *page, nid_t ino)
552{
553 struct bio_vec *bvec;
554 struct bvec_iter_all iter_all;
555
556 if (!bio)
557 return false;
558
559 if (!inode && !page && !ino)
560 return true;
561
562 bio_for_each_segment_all(bvec, bio, iter_all) {
563 struct page *target = bvec->bv_page;
564
565 if (fscrypt_is_bounce_page(target)) {
566 target = fscrypt_pagecache_page(target);
567 if (IS_ERR(target))
568 continue;
569 }
570 if (f2fs_is_compressed_page(target)) {
571 target = f2fs_compress_control_page(target);
572 if (IS_ERR(target))
573 continue;
574 }
575
576 if (inode && inode == target->mapping->host)
577 return true;
578 if (page && page == target)
579 return true;
580 if (ino && ino == ino_of_node(target))
581 return true;
582 }
583
584 return false;
585}
586
587static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
588 enum page_type type, enum temp_type temp)
589{
590 enum page_type btype = PAGE_TYPE_OF_BIO(type);
591 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
592
593 down_write(&io->io_rwsem);
594
595
596 if (type >= META_FLUSH) {
597 io->fio.type = META_FLUSH;
598 io->fio.op = REQ_OP_WRITE;
599 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
600 if (!test_opt(sbi, NOBARRIER))
601 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
602 }
603 __submit_merged_bio(io);
604 up_write(&io->io_rwsem);
605}
606
607static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
608 struct inode *inode, struct page *page,
609 nid_t ino, enum page_type type, bool force)
610{
611 enum temp_type temp;
612 bool ret = true;
613
614 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
615 if (!force) {
616 enum page_type btype = PAGE_TYPE_OF_BIO(type);
617 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
618
619 down_read(&io->io_rwsem);
620 ret = __has_merged_page(io->bio, inode, page, ino);
621 up_read(&io->io_rwsem);
622 }
623 if (ret)
624 __f2fs_submit_merged_write(sbi, type, temp);
625
626
627 if (type >= META)
628 break;
629 }
630}
631
632void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
633{
634 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
635}
636
637void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
638 struct inode *inode, struct page *page,
639 nid_t ino, enum page_type type)
640{
641 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
642}
643
644void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
645{
646 f2fs_submit_merged_write(sbi, DATA);
647 f2fs_submit_merged_write(sbi, NODE);
648 f2fs_submit_merged_write(sbi, META);
649}
650
651
652
653
654
655int f2fs_submit_page_bio(struct f2fs_io_info *fio)
656{
657 struct bio *bio;
658 struct page *page = fio->encrypted_page ?
659 fio->encrypted_page : fio->page;
660
661 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
662 fio->is_por ? META_POR : (__is_meta_io(fio) ?
663 META_GENERIC : DATA_GENERIC_ENHANCE)))
664 return -EFSCORRUPTED;
665
666 trace_f2fs_submit_page_bio(page, fio);
667
668
669 bio = __bio_alloc(fio, 1);
670
671 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
672 fio->page->index, fio, GFP_NOIO);
673
674 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
675 bio_put(bio);
676 return -EFAULT;
677 }
678
679 if (fio->io_wbc && !is_read_io(fio->op))
680 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
681
682 __attach_io_flag(fio);
683 bio_set_op_attrs(bio, fio->op, fio->op_flags);
684
685 inc_page_count(fio->sbi, is_read_io(fio->op) ?
686 __read_io_type(page): WB_DATA_TYPE(fio->page));
687
688 __submit_bio(fio->sbi, bio, fio->type);
689 return 0;
690}
691
692static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
693 block_t last_blkaddr, block_t cur_blkaddr)
694{
695 if (unlikely(sbi->max_io_bytes &&
696 bio->bi_iter.bi_size >= sbi->max_io_bytes))
697 return false;
698 if (last_blkaddr + 1 != cur_blkaddr)
699 return false;
700 return bio->bi_bdev == f2fs_target_device(sbi, cur_blkaddr, NULL);
701}
702
703static bool io_type_is_mergeable(struct f2fs_bio_info *io,
704 struct f2fs_io_info *fio)
705{
706 if (io->fio.op != fio->op)
707 return false;
708 return io->fio.op_flags == fio->op_flags;
709}
710
711static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
712 struct f2fs_bio_info *io,
713 struct f2fs_io_info *fio,
714 block_t last_blkaddr,
715 block_t cur_blkaddr)
716{
717 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
718 unsigned int filled_blocks =
719 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
720 unsigned int io_size = F2FS_IO_SIZE(sbi);
721 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
722
723
724 if (!(filled_blocks % io_size) && left_vecs < io_size)
725 return false;
726 }
727 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
728 return false;
729 return io_type_is_mergeable(io, fio);
730}
731
732static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
733 struct page *page, enum temp_type temp)
734{
735 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
736 struct bio_entry *be;
737
738 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS, true, NULL);
739 be->bio = bio;
740 bio_get(bio);
741
742 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
743 f2fs_bug_on(sbi, 1);
744
745 down_write(&io->bio_list_lock);
746 list_add_tail(&be->list, &io->bio_list);
747 up_write(&io->bio_list_lock);
748}
749
750static void del_bio_entry(struct bio_entry *be)
751{
752 list_del(&be->list);
753 kmem_cache_free(bio_entry_slab, be);
754}
755
756static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio,
757 struct page *page)
758{
759 struct f2fs_sb_info *sbi = fio->sbi;
760 enum temp_type temp;
761 bool found = false;
762 int ret = -EAGAIN;
763
764 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
765 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
766 struct list_head *head = &io->bio_list;
767 struct bio_entry *be;
768
769 down_write(&io->bio_list_lock);
770 list_for_each_entry(be, head, list) {
771 if (be->bio != *bio)
772 continue;
773
774 found = true;
775
776 f2fs_bug_on(sbi, !page_is_mergeable(sbi, *bio,
777 *fio->last_block,
778 fio->new_blkaddr));
779 if (f2fs_crypt_mergeable_bio(*bio,
780 fio->page->mapping->host,
781 fio->page->index, fio) &&
782 bio_add_page(*bio, page, PAGE_SIZE, 0) ==
783 PAGE_SIZE) {
784 ret = 0;
785 break;
786 }
787
788
789 del_bio_entry(be);
790 __submit_bio(sbi, *bio, DATA);
791 break;
792 }
793 up_write(&io->bio_list_lock);
794 }
795
796 if (ret) {
797 bio_put(*bio);
798 *bio = NULL;
799 }
800
801 return ret;
802}
803
804void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
805 struct bio **bio, struct page *page)
806{
807 enum temp_type temp;
808 bool found = false;
809 struct bio *target = bio ? *bio : NULL;
810
811 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
812 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
813 struct list_head *head = &io->bio_list;
814 struct bio_entry *be;
815
816 if (list_empty(head))
817 continue;
818
819 down_read(&io->bio_list_lock);
820 list_for_each_entry(be, head, list) {
821 if (target)
822 found = (target == be->bio);
823 else
824 found = __has_merged_page(be->bio, NULL,
825 page, 0);
826 if (found)
827 break;
828 }
829 up_read(&io->bio_list_lock);
830
831 if (!found)
832 continue;
833
834 found = false;
835
836 down_write(&io->bio_list_lock);
837 list_for_each_entry(be, head, list) {
838 if (target)
839 found = (target == be->bio);
840 else
841 found = __has_merged_page(be->bio, NULL,
842 page, 0);
843 if (found) {
844 target = be->bio;
845 del_bio_entry(be);
846 break;
847 }
848 }
849 up_write(&io->bio_list_lock);
850 }
851
852 if (found)
853 __submit_bio(sbi, target, DATA);
854 if (bio && *bio) {
855 bio_put(*bio);
856 *bio = NULL;
857 }
858}
859
860int f2fs_merge_page_bio(struct f2fs_io_info *fio)
861{
862 struct bio *bio = *fio->bio;
863 struct page *page = fio->encrypted_page ?
864 fio->encrypted_page : fio->page;
865
866 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
867 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
868 return -EFSCORRUPTED;
869
870 trace_f2fs_submit_page_bio(page, fio);
871
872 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
873 fio->new_blkaddr))
874 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
875alloc_new:
876 if (!bio) {
877 bio = __bio_alloc(fio, BIO_MAX_VECS);
878 __attach_io_flag(fio);
879 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
880 fio->page->index, fio, GFP_NOIO);
881 bio_set_op_attrs(bio, fio->op, fio->op_flags);
882
883 add_bio_entry(fio->sbi, bio, page, fio->temp);
884 } else {
885 if (add_ipu_page(fio, &bio, page))
886 goto alloc_new;
887 }
888
889 if (fio->io_wbc)
890 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
891
892 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
893
894 *fio->last_block = fio->new_blkaddr;
895 *fio->bio = bio;
896
897 return 0;
898}
899
900void f2fs_submit_page_write(struct f2fs_io_info *fio)
901{
902 struct f2fs_sb_info *sbi = fio->sbi;
903 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
904 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
905 struct page *bio_page;
906
907 f2fs_bug_on(sbi, is_read_io(fio->op));
908
909 down_write(&io->io_rwsem);
910next:
911 if (fio->in_list) {
912 spin_lock(&io->io_lock);
913 if (list_empty(&io->io_list)) {
914 spin_unlock(&io->io_lock);
915 goto out;
916 }
917 fio = list_first_entry(&io->io_list,
918 struct f2fs_io_info, list);
919 list_del(&fio->list);
920 spin_unlock(&io->io_lock);
921 }
922
923 verify_fio_blkaddr(fio);
924
925 if (fio->encrypted_page)
926 bio_page = fio->encrypted_page;
927 else if (fio->compressed_page)
928 bio_page = fio->compressed_page;
929 else
930 bio_page = fio->page;
931
932
933 fio->submitted = true;
934
935 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
936
937 if (io->bio &&
938 (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio,
939 fio->new_blkaddr) ||
940 !f2fs_crypt_mergeable_bio(io->bio, fio->page->mapping->host,
941 bio_page->index, fio)))
942 __submit_merged_bio(io);
943alloc_new:
944 if (io->bio == NULL) {
945 if (F2FS_IO_ALIGNED(sbi) &&
946 (fio->type == DATA || fio->type == NODE) &&
947 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
948 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
949 fio->retry = true;
950 goto skip;
951 }
952 io->bio = __bio_alloc(fio, BIO_MAX_VECS);
953 f2fs_set_bio_crypt_ctx(io->bio, fio->page->mapping->host,
954 bio_page->index, fio, GFP_NOIO);
955 io->fio = *fio;
956 }
957
958 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
959 __submit_merged_bio(io);
960 goto alloc_new;
961 }
962
963 if (fio->io_wbc)
964 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
965
966 io->last_block_in_bio = fio->new_blkaddr;
967
968 trace_f2fs_submit_page_write(fio->page, fio);
969skip:
970 if (fio->in_list)
971 goto next;
972out:
973 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
974 !f2fs_is_checkpoint_ready(sbi))
975 __submit_merged_bio(io);
976 up_write(&io->io_rwsem);
977}
978
979static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
980 unsigned nr_pages, unsigned op_flag,
981 pgoff_t first_idx, bool for_write)
982{
983 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
984 struct bio *bio;
985 struct bio_post_read_ctx *ctx = NULL;
986 unsigned int post_read_steps = 0;
987
988 bio = bio_alloc_bioset(for_write ? GFP_NOIO : GFP_KERNEL,
989 bio_max_segs(nr_pages), &f2fs_bioset);
990 if (!bio)
991 return ERR_PTR(-ENOMEM);
992
993 f2fs_set_bio_crypt_ctx(bio, inode, first_idx, NULL, GFP_NOFS);
994
995 f2fs_target_device(sbi, blkaddr, bio);
996 bio->bi_end_io = f2fs_read_end_io;
997 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
998
999 if (fscrypt_inode_uses_fs_layer_crypto(inode))
1000 post_read_steps |= STEP_DECRYPT;
1001
1002 if (f2fs_need_verity(inode, first_idx))
1003 post_read_steps |= STEP_VERITY;
1004
1005
1006
1007
1008
1009
1010
1011
1012 if (post_read_steps || f2fs_compressed_file(inode)) {
1013
1014 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
1015 ctx->bio = bio;
1016 ctx->sbi = sbi;
1017 ctx->enabled_steps = post_read_steps;
1018 ctx->fs_blkaddr = blkaddr;
1019 bio->bi_private = ctx;
1020 }
1021 iostat_alloc_and_bind_ctx(sbi, bio, ctx);
1022
1023 return bio;
1024}
1025
1026
1027static int f2fs_submit_page_read(struct inode *inode, struct page *page,
1028 block_t blkaddr, int op_flags, bool for_write)
1029{
1030 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1031 struct bio *bio;
1032
1033 bio = f2fs_grab_read_bio(inode, blkaddr, 1, op_flags,
1034 page->index, for_write);
1035 if (IS_ERR(bio))
1036 return PTR_ERR(bio);
1037
1038
1039 f2fs_wait_on_block_writeback(inode, blkaddr);
1040
1041 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1042 bio_put(bio);
1043 return -EFAULT;
1044 }
1045 ClearPageError(page);
1046 inc_page_count(sbi, F2FS_RD_DATA);
1047 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
1048 __submit_bio(sbi, bio, DATA);
1049 return 0;
1050}
1051
1052static void __set_data_blkaddr(struct dnode_of_data *dn)
1053{
1054 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
1055 __le32 *addr_array;
1056 int base = 0;
1057
1058 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
1059 base = get_extra_isize(dn->inode);
1060
1061
1062 addr_array = blkaddr_in_node(rn);
1063 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
1064}
1065
1066
1067
1068
1069
1070
1071
1072void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
1073{
1074 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
1075 __set_data_blkaddr(dn);
1076 if (set_page_dirty(dn->node_page))
1077 dn->node_changed = true;
1078}
1079
1080void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
1081{
1082 dn->data_blkaddr = blkaddr;
1083 f2fs_set_data_blkaddr(dn);
1084 f2fs_update_extent_cache(dn);
1085}
1086
1087
1088int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
1089{
1090 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1091 int err;
1092
1093 if (!count)
1094 return 0;
1095
1096 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
1097 return -EPERM;
1098 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1099 return err;
1100
1101 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
1102 dn->ofs_in_node, count);
1103
1104 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
1105
1106 for (; count > 0; dn->ofs_in_node++) {
1107 block_t blkaddr = f2fs_data_blkaddr(dn);
1108
1109 if (blkaddr == NULL_ADDR) {
1110 dn->data_blkaddr = NEW_ADDR;
1111 __set_data_blkaddr(dn);
1112 count--;
1113 }
1114 }
1115
1116 if (set_page_dirty(dn->node_page))
1117 dn->node_changed = true;
1118 return 0;
1119}
1120
1121
1122int f2fs_reserve_new_block(struct dnode_of_data *dn)
1123{
1124 unsigned int ofs_in_node = dn->ofs_in_node;
1125 int ret;
1126
1127 ret = f2fs_reserve_new_blocks(dn, 1);
1128 dn->ofs_in_node = ofs_in_node;
1129 return ret;
1130}
1131
1132int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
1133{
1134 bool need_put = dn->inode_page ? false : true;
1135 int err;
1136
1137 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
1138 if (err)
1139 return err;
1140
1141 if (dn->data_blkaddr == NULL_ADDR)
1142 err = f2fs_reserve_new_block(dn);
1143 if (err || need_put)
1144 f2fs_put_dnode(dn);
1145 return err;
1146}
1147
1148int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
1149{
1150 struct extent_info ei = {0, };
1151 struct inode *inode = dn->inode;
1152
1153 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1154 dn->data_blkaddr = ei.blk + index - ei.fofs;
1155 return 0;
1156 }
1157
1158 return f2fs_reserve_block(dn, index);
1159}
1160
1161struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
1162 int op_flags, bool for_write)
1163{
1164 struct address_space *mapping = inode->i_mapping;
1165 struct dnode_of_data dn;
1166 struct page *page;
1167 struct extent_info ei = {0, };
1168 int err;
1169
1170 page = f2fs_grab_cache_page(mapping, index, for_write);
1171 if (!page)
1172 return ERR_PTR(-ENOMEM);
1173
1174 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1175 dn.data_blkaddr = ei.blk + index - ei.fofs;
1176 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1177 DATA_GENERIC_ENHANCE_READ)) {
1178 err = -EFSCORRUPTED;
1179 goto put_err;
1180 }
1181 goto got_it;
1182 }
1183
1184 set_new_dnode(&dn, inode, NULL, NULL, 0);
1185 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
1186 if (err)
1187 goto put_err;
1188 f2fs_put_dnode(&dn);
1189
1190 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
1191 err = -ENOENT;
1192 goto put_err;
1193 }
1194 if (dn.data_blkaddr != NEW_ADDR &&
1195 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1196 dn.data_blkaddr,
1197 DATA_GENERIC_ENHANCE)) {
1198 err = -EFSCORRUPTED;
1199 goto put_err;
1200 }
1201got_it:
1202 if (PageUptodate(page)) {
1203 unlock_page(page);
1204 return page;
1205 }
1206
1207
1208
1209
1210
1211
1212
1213
1214 if (dn.data_blkaddr == NEW_ADDR) {
1215 zero_user_segment(page, 0, PAGE_SIZE);
1216 if (!PageUptodate(page))
1217 SetPageUptodate(page);
1218 unlock_page(page);
1219 return page;
1220 }
1221
1222 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr,
1223 op_flags, for_write);
1224 if (err)
1225 goto put_err;
1226 return page;
1227
1228put_err:
1229 f2fs_put_page(page, 1);
1230 return ERR_PTR(err);
1231}
1232
1233struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
1234{
1235 struct address_space *mapping = inode->i_mapping;
1236 struct page *page;
1237
1238 page = find_get_page(mapping, index);
1239 if (page && PageUptodate(page))
1240 return page;
1241 f2fs_put_page(page, 0);
1242
1243 page = f2fs_get_read_data_page(inode, index, 0, false);
1244 if (IS_ERR(page))
1245 return page;
1246
1247 if (PageUptodate(page))
1248 return page;
1249
1250 wait_on_page_locked(page);
1251 if (unlikely(!PageUptodate(page))) {
1252 f2fs_put_page(page, 0);
1253 return ERR_PTR(-EIO);
1254 }
1255 return page;
1256}
1257
1258
1259
1260
1261
1262
1263struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
1264 bool for_write)
1265{
1266 struct address_space *mapping = inode->i_mapping;
1267 struct page *page;
1268repeat:
1269 page = f2fs_get_read_data_page(inode, index, 0, for_write);
1270 if (IS_ERR(page))
1271 return page;
1272
1273
1274 lock_page(page);
1275 if (unlikely(page->mapping != mapping)) {
1276 f2fs_put_page(page, 1);
1277 goto repeat;
1278 }
1279 if (unlikely(!PageUptodate(page))) {
1280 f2fs_put_page(page, 1);
1281 return ERR_PTR(-EIO);
1282 }
1283 return page;
1284}
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295struct page *f2fs_get_new_data_page(struct inode *inode,
1296 struct page *ipage, pgoff_t index, bool new_i_size)
1297{
1298 struct address_space *mapping = inode->i_mapping;
1299 struct page *page;
1300 struct dnode_of_data dn;
1301 int err;
1302
1303 page = f2fs_grab_cache_page(mapping, index, true);
1304 if (!page) {
1305
1306
1307
1308
1309 f2fs_put_page(ipage, 1);
1310 return ERR_PTR(-ENOMEM);
1311 }
1312
1313 set_new_dnode(&dn, inode, ipage, NULL, 0);
1314 err = f2fs_reserve_block(&dn, index);
1315 if (err) {
1316 f2fs_put_page(page, 1);
1317 return ERR_PTR(err);
1318 }
1319 if (!ipage)
1320 f2fs_put_dnode(&dn);
1321
1322 if (PageUptodate(page))
1323 goto got_it;
1324
1325 if (dn.data_blkaddr == NEW_ADDR) {
1326 zero_user_segment(page, 0, PAGE_SIZE);
1327 if (!PageUptodate(page))
1328 SetPageUptodate(page);
1329 } else {
1330 f2fs_put_page(page, 1);
1331
1332
1333 f2fs_bug_on(F2FS_I_SB(inode), ipage);
1334 page = f2fs_get_lock_data_page(inode, index, true);
1335 if (IS_ERR(page))
1336 return page;
1337 }
1338got_it:
1339 if (new_i_size && i_size_read(inode) <
1340 ((loff_t)(index + 1) << PAGE_SHIFT))
1341 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
1342 return page;
1343}
1344
1345static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
1346{
1347 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1348 struct f2fs_summary sum;
1349 struct node_info ni;
1350 block_t old_blkaddr;
1351 blkcnt_t count = 1;
1352 int err;
1353
1354 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
1355 return -EPERM;
1356
1357 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1358 if (err)
1359 return err;
1360
1361 dn->data_blkaddr = f2fs_data_blkaddr(dn);
1362 if (dn->data_blkaddr != NULL_ADDR)
1363 goto alloc;
1364
1365 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1366 return err;
1367
1368alloc:
1369 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
1370 old_blkaddr = dn->data_blkaddr;
1371 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
1372 &sum, seg_type, NULL);
1373 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
1374 invalidate_mapping_pages(META_MAPPING(sbi),
1375 old_blkaddr, old_blkaddr);
1376 f2fs_invalidate_compress_page(sbi, old_blkaddr);
1377 }
1378 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
1379
1380
1381
1382
1383
1384 return 0;
1385}
1386
1387int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
1388{
1389 struct inode *inode = file_inode(iocb->ki_filp);
1390 struct f2fs_map_blocks map;
1391 int flag;
1392 int err = 0;
1393 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
1394
1395 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
1396 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1397 if (map.m_len > map.m_lblk)
1398 map.m_len -= map.m_lblk;
1399 else
1400 map.m_len = 0;
1401
1402 map.m_next_pgofs = NULL;
1403 map.m_next_extent = NULL;
1404 map.m_seg_type = NO_CHECK_TYPE;
1405 map.m_may_create = true;
1406
1407 if (direct_io) {
1408 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
1409 flag = f2fs_force_buffered_io(inode, iocb, from) ?
1410 F2FS_GET_BLOCK_PRE_AIO :
1411 F2FS_GET_BLOCK_PRE_DIO;
1412 goto map_blocks;
1413 }
1414 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
1415 err = f2fs_convert_inline_inode(inode);
1416 if (err)
1417 return err;
1418 }
1419 if (f2fs_has_inline_data(inode))
1420 return err;
1421
1422 flag = F2FS_GET_BLOCK_PRE_AIO;
1423
1424map_blocks:
1425 err = f2fs_map_blocks(inode, &map, 1, flag);
1426 if (map.m_len > 0 && err == -ENOSPC) {
1427 if (!direct_io)
1428 set_inode_flag(inode, FI_NO_PREALLOC);
1429 err = 0;
1430 }
1431 return err;
1432}
1433
1434void f2fs_do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
1435{
1436 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1437 if (lock)
1438 down_read(&sbi->node_change);
1439 else
1440 up_read(&sbi->node_change);
1441 } else {
1442 if (lock)
1443 f2fs_lock_op(sbi);
1444 else
1445 f2fs_unlock_op(sbi);
1446 }
1447}
1448
1449
1450
1451
1452
1453
1454int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
1455 int create, int flag)
1456{
1457 unsigned int maxblocks = map->m_len;
1458 struct dnode_of_data dn;
1459 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1460 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
1461 pgoff_t pgofs, end_offset, end;
1462 int err = 0, ofs = 1;
1463 unsigned int ofs_in_node, last_ofs_in_node;
1464 blkcnt_t prealloc;
1465 struct extent_info ei = {0, };
1466 block_t blkaddr;
1467 unsigned int start_pgofs;
1468
1469 if (!maxblocks)
1470 return 0;
1471
1472 map->m_len = 0;
1473 map->m_flags = 0;
1474
1475
1476 pgofs = (pgoff_t)map->m_lblk;
1477 end = pgofs + maxblocks;
1478
1479 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
1480 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
1481 map->m_may_create)
1482 goto next_dnode;
1483
1484 map->m_pblk = ei.blk + pgofs - ei.fofs;
1485 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1486 map->m_flags = F2FS_MAP_MAPPED;
1487 if (map->m_next_extent)
1488 *map->m_next_extent = pgofs + map->m_len;
1489
1490
1491 if (flag == F2FS_GET_BLOCK_DIO)
1492 f2fs_wait_on_block_writeback_range(inode,
1493 map->m_pblk, map->m_len);
1494 goto out;
1495 }
1496
1497next_dnode:
1498 if (map->m_may_create)
1499 f2fs_do_map_lock(sbi, flag, true);
1500
1501
1502 set_new_dnode(&dn, inode, NULL, NULL, 0);
1503 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1504 if (err) {
1505 if (flag == F2FS_GET_BLOCK_BMAP)
1506 map->m_pblk = 0;
1507
1508 if (err == -ENOENT) {
1509
1510
1511
1512
1513
1514
1515 if (map->m_may_create &&
1516 (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
1517 f2fs_cp_error(sbi))) {
1518 err = -EIO;
1519 goto unlock_out;
1520 }
1521
1522 err = 0;
1523 if (map->m_next_pgofs)
1524 *map->m_next_pgofs =
1525 f2fs_get_next_page_offset(&dn, pgofs);
1526 if (map->m_next_extent)
1527 *map->m_next_extent =
1528 f2fs_get_next_page_offset(&dn, pgofs);
1529 }
1530 goto unlock_out;
1531 }
1532
1533 start_pgofs = pgofs;
1534 prealloc = 0;
1535 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
1536 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1537
1538next_block:
1539 blkaddr = f2fs_data_blkaddr(&dn);
1540
1541 if (__is_valid_data_blkaddr(blkaddr) &&
1542 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
1543 err = -EFSCORRUPTED;
1544 goto sync_out;
1545 }
1546
1547 if (__is_valid_data_blkaddr(blkaddr)) {
1548
1549 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
1550 map->m_may_create) {
1551 err = __allocate_data_block(&dn, map->m_seg_type);
1552 if (err)
1553 goto sync_out;
1554 blkaddr = dn.data_blkaddr;
1555 set_inode_flag(inode, FI_APPEND_WRITE);
1556 }
1557 } else {
1558 if (create) {
1559 if (unlikely(f2fs_cp_error(sbi))) {
1560 err = -EIO;
1561 goto sync_out;
1562 }
1563 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1564 if (blkaddr == NULL_ADDR) {
1565 prealloc++;
1566 last_ofs_in_node = dn.ofs_in_node;
1567 }
1568 } else {
1569 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1570 flag != F2FS_GET_BLOCK_DIO);
1571 err = __allocate_data_block(&dn,
1572 map->m_seg_type);
1573 if (!err)
1574 set_inode_flag(inode, FI_APPEND_WRITE);
1575 }
1576 if (err)
1577 goto sync_out;
1578 map->m_flags |= F2FS_MAP_NEW;
1579 blkaddr = dn.data_blkaddr;
1580 } else {
1581 if (f2fs_compressed_file(inode) &&
1582 f2fs_sanity_check_cluster(&dn) &&
1583 (flag != F2FS_GET_BLOCK_FIEMAP ||
1584 IS_ENABLED(CONFIG_F2FS_CHECK_FS))) {
1585 err = -EFSCORRUPTED;
1586 goto sync_out;
1587 }
1588 if (flag == F2FS_GET_BLOCK_BMAP) {
1589 map->m_pblk = 0;
1590 goto sync_out;
1591 }
1592 if (flag == F2FS_GET_BLOCK_PRECACHE)
1593 goto sync_out;
1594 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1595 blkaddr == NULL_ADDR) {
1596 if (map->m_next_pgofs)
1597 *map->m_next_pgofs = pgofs + 1;
1598 goto sync_out;
1599 }
1600 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1601
1602 if (map->m_next_pgofs)
1603 *map->m_next_pgofs = pgofs + 1;
1604 goto sync_out;
1605 }
1606 }
1607 }
1608
1609 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1610 goto skip;
1611
1612 if (map->m_len == 0) {
1613
1614 if (blkaddr == NEW_ADDR)
1615 map->m_flags |= F2FS_MAP_UNWRITTEN;
1616 map->m_flags |= F2FS_MAP_MAPPED;
1617
1618 map->m_pblk = blkaddr;
1619 map->m_len = 1;
1620 } else if ((map->m_pblk != NEW_ADDR &&
1621 blkaddr == (map->m_pblk + ofs)) ||
1622 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
1623 flag == F2FS_GET_BLOCK_PRE_DIO) {
1624 ofs++;
1625 map->m_len++;
1626 } else {
1627 goto sync_out;
1628 }
1629
1630skip:
1631 dn.ofs_in_node++;
1632 pgofs++;
1633
1634
1635 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1636 (pgofs == end || dn.ofs_in_node == end_offset)) {
1637
1638 dn.ofs_in_node = ofs_in_node;
1639 err = f2fs_reserve_new_blocks(&dn, prealloc);
1640 if (err)
1641 goto sync_out;
1642
1643 map->m_len += dn.ofs_in_node - ofs_in_node;
1644 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1645 err = -ENOSPC;
1646 goto sync_out;
1647 }
1648 dn.ofs_in_node = end_offset;
1649 }
1650
1651 if (pgofs >= end)
1652 goto sync_out;
1653 else if (dn.ofs_in_node < end_offset)
1654 goto next_block;
1655
1656 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1657 if (map->m_flags & F2FS_MAP_MAPPED) {
1658 unsigned int ofs = start_pgofs - map->m_lblk;
1659
1660 f2fs_update_extent_cache_range(&dn,
1661 start_pgofs, map->m_pblk + ofs,
1662 map->m_len - ofs);
1663 }
1664 }
1665
1666 f2fs_put_dnode(&dn);
1667
1668 if (map->m_may_create) {
1669 f2fs_do_map_lock(sbi, flag, false);
1670 f2fs_balance_fs(sbi, dn.node_changed);
1671 }
1672 goto next_dnode;
1673
1674sync_out:
1675
1676
1677 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1678 f2fs_wait_on_block_writeback_range(inode,
1679 map->m_pblk, map->m_len);
1680
1681 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1682 if (map->m_flags & F2FS_MAP_MAPPED) {
1683 unsigned int ofs = start_pgofs - map->m_lblk;
1684
1685 f2fs_update_extent_cache_range(&dn,
1686 start_pgofs, map->m_pblk + ofs,
1687 map->m_len - ofs);
1688 }
1689 if (map->m_next_extent)
1690 *map->m_next_extent = pgofs + 1;
1691 }
1692 f2fs_put_dnode(&dn);
1693unlock_out:
1694 if (map->m_may_create) {
1695 f2fs_do_map_lock(sbi, flag, false);
1696 f2fs_balance_fs(sbi, dn.node_changed);
1697 }
1698out:
1699 trace_f2fs_map_blocks(inode, map, err);
1700 return err;
1701}
1702
1703bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1704{
1705 struct f2fs_map_blocks map;
1706 block_t last_lblk;
1707 int err;
1708
1709 if (pos + len > i_size_read(inode))
1710 return false;
1711
1712 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1713 map.m_next_pgofs = NULL;
1714 map.m_next_extent = NULL;
1715 map.m_seg_type = NO_CHECK_TYPE;
1716 map.m_may_create = false;
1717 last_lblk = F2FS_BLK_ALIGN(pos + len);
1718
1719 while (map.m_lblk < last_lblk) {
1720 map.m_len = last_lblk - map.m_lblk;
1721 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1722 if (err || map.m_len == 0)
1723 return false;
1724 map.m_lblk += map.m_len;
1725 }
1726 return true;
1727}
1728
1729static inline u64 bytes_to_blks(struct inode *inode, u64 bytes)
1730{
1731 return (bytes >> inode->i_blkbits);
1732}
1733
1734static inline u64 blks_to_bytes(struct inode *inode, u64 blks)
1735{
1736 return (blks << inode->i_blkbits);
1737}
1738
1739static int __get_data_block(struct inode *inode, sector_t iblock,
1740 struct buffer_head *bh, int create, int flag,
1741 pgoff_t *next_pgofs, int seg_type, bool may_write)
1742{
1743 struct f2fs_map_blocks map;
1744 int err;
1745
1746 map.m_lblk = iblock;
1747 map.m_len = bytes_to_blks(inode, bh->b_size);
1748 map.m_next_pgofs = next_pgofs;
1749 map.m_next_extent = NULL;
1750 map.m_seg_type = seg_type;
1751 map.m_may_create = may_write;
1752
1753 err = f2fs_map_blocks(inode, &map, create, flag);
1754 if (!err) {
1755 map_bh(bh, inode->i_sb, map.m_pblk);
1756 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
1757 bh->b_size = blks_to_bytes(inode, map.m_len);
1758 }
1759 return err;
1760}
1761
1762static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1763 struct buffer_head *bh_result, int create)
1764{
1765 return __get_data_block(inode, iblock, bh_result, create,
1766 F2FS_GET_BLOCK_DIO, NULL,
1767 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1768 true);
1769}
1770
1771static int get_data_block_dio(struct inode *inode, sector_t iblock,
1772 struct buffer_head *bh_result, int create)
1773{
1774 return __get_data_block(inode, iblock, bh_result, create,
1775 F2FS_GET_BLOCK_DIO, NULL,
1776 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1777 false);
1778}
1779
1780static int f2fs_xattr_fiemap(struct inode *inode,
1781 struct fiemap_extent_info *fieinfo)
1782{
1783 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1784 struct page *page;
1785 struct node_info ni;
1786 __u64 phys = 0, len;
1787 __u32 flags;
1788 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1789 int err = 0;
1790
1791 if (f2fs_has_inline_xattr(inode)) {
1792 int offset;
1793
1794 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1795 inode->i_ino, false);
1796 if (!page)
1797 return -ENOMEM;
1798
1799 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1800 if (err) {
1801 f2fs_put_page(page, 1);
1802 return err;
1803 }
1804
1805 phys = blks_to_bytes(inode, ni.blk_addr);
1806 offset = offsetof(struct f2fs_inode, i_addr) +
1807 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
1808 get_inline_xattr_addrs(inode));
1809
1810 phys += offset;
1811 len = inline_xattr_size(inode);
1812
1813 f2fs_put_page(page, 1);
1814
1815 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1816
1817 if (!xnid)
1818 flags |= FIEMAP_EXTENT_LAST;
1819
1820 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1821 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
1822 if (err || err == 1)
1823 return err;
1824 }
1825
1826 if (xnid) {
1827 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1828 if (!page)
1829 return -ENOMEM;
1830
1831 err = f2fs_get_node_info(sbi, xnid, &ni);
1832 if (err) {
1833 f2fs_put_page(page, 1);
1834 return err;
1835 }
1836
1837 phys = blks_to_bytes(inode, ni.blk_addr);
1838 len = inode->i_sb->s_blocksize;
1839
1840 f2fs_put_page(page, 1);
1841
1842 flags = FIEMAP_EXTENT_LAST;
1843 }
1844
1845 if (phys) {
1846 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1847 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
1848 }
1849
1850 return (err < 0 ? err : 0);
1851}
1852
1853static loff_t max_inode_blocks(struct inode *inode)
1854{
1855 loff_t result = ADDRS_PER_INODE(inode);
1856 loff_t leaf_count = ADDRS_PER_BLOCK(inode);
1857
1858
1859 result += (leaf_count * 2);
1860
1861
1862 leaf_count *= NIDS_PER_BLOCK;
1863 result += (leaf_count * 2);
1864
1865
1866 leaf_count *= NIDS_PER_BLOCK;
1867 result += leaf_count;
1868
1869 return result;
1870}
1871
1872int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1873 u64 start, u64 len)
1874{
1875 struct f2fs_map_blocks map;
1876 sector_t start_blk, last_blk;
1877 pgoff_t next_pgofs;
1878 u64 logical = 0, phys = 0, size = 0;
1879 u32 flags = 0;
1880 int ret = 0;
1881 bool compr_cluster = false, compr_appended;
1882 unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
1883 unsigned int count_in_cluster = 0;
1884 loff_t maxbytes;
1885
1886 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1887 ret = f2fs_precache_extents(inode);
1888 if (ret)
1889 return ret;
1890 }
1891
1892 ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR);
1893 if (ret)
1894 return ret;
1895
1896 inode_lock(inode);
1897
1898 maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS;
1899 if (start > maxbytes) {
1900 ret = -EFBIG;
1901 goto out;
1902 }
1903
1904 if (len > maxbytes || (maxbytes - len) < start)
1905 len = maxbytes - start;
1906
1907 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1908 ret = f2fs_xattr_fiemap(inode, fieinfo);
1909 goto out;
1910 }
1911
1912 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
1913 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1914 if (ret != -EAGAIN)
1915 goto out;
1916 }
1917
1918 if (bytes_to_blks(inode, len) == 0)
1919 len = blks_to_bytes(inode, 1);
1920
1921 start_blk = bytes_to_blks(inode, start);
1922 last_blk = bytes_to_blks(inode, start + len - 1);
1923
1924next:
1925 memset(&map, 0, sizeof(map));
1926 map.m_lblk = start_blk;
1927 map.m_len = bytes_to_blks(inode, len);
1928 map.m_next_pgofs = &next_pgofs;
1929 map.m_seg_type = NO_CHECK_TYPE;
1930
1931 if (compr_cluster) {
1932 map.m_lblk += 1;
1933 map.m_len = cluster_size - count_in_cluster;
1934 }
1935
1936 ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
1937 if (ret)
1938 goto out;
1939
1940
1941 if (!compr_cluster && !(map.m_flags & F2FS_MAP_FLAGS)) {
1942 start_blk = next_pgofs;
1943
1944 if (blks_to_bytes(inode, start_blk) < blks_to_bytes(inode,
1945 max_inode_blocks(inode)))
1946 goto prep_next;
1947
1948 flags |= FIEMAP_EXTENT_LAST;
1949 }
1950
1951 compr_appended = false;
1952
1953 if (compr_cluster && ((map.m_flags & F2FS_MAP_UNWRITTEN) ||
1954 !(map.m_flags & F2FS_MAP_FLAGS))) {
1955 compr_appended = true;
1956 goto skip_fill;
1957 }
1958
1959 if (size) {
1960 flags |= FIEMAP_EXTENT_MERGED;
1961 if (IS_ENCRYPTED(inode))
1962 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1963
1964 ret = fiemap_fill_next_extent(fieinfo, logical,
1965 phys, size, flags);
1966 trace_f2fs_fiemap(inode, logical, phys, size, flags, ret);
1967 if (ret)
1968 goto out;
1969 size = 0;
1970 }
1971
1972 if (start_blk > last_blk)
1973 goto out;
1974
1975skip_fill:
1976 if (map.m_pblk == COMPRESS_ADDR) {
1977 compr_cluster = true;
1978 count_in_cluster = 1;
1979 } else if (compr_appended) {
1980 unsigned int appended_blks = cluster_size -
1981 count_in_cluster + 1;
1982 size += blks_to_bytes(inode, appended_blks);
1983 start_blk += appended_blks;
1984 compr_cluster = false;
1985 } else {
1986 logical = blks_to_bytes(inode, start_blk);
1987 phys = __is_valid_data_blkaddr(map.m_pblk) ?
1988 blks_to_bytes(inode, map.m_pblk) : 0;
1989 size = blks_to_bytes(inode, map.m_len);
1990 flags = 0;
1991
1992 if (compr_cluster) {
1993 flags = FIEMAP_EXTENT_ENCODED;
1994 count_in_cluster += map.m_len;
1995 if (count_in_cluster == cluster_size) {
1996 compr_cluster = false;
1997 size += blks_to_bytes(inode, 1);
1998 }
1999 } else if (map.m_flags & F2FS_MAP_UNWRITTEN) {
2000 flags = FIEMAP_EXTENT_UNWRITTEN;
2001 }
2002
2003 start_blk += bytes_to_blks(inode, size);
2004 }
2005
2006prep_next:
2007 cond_resched();
2008 if (fatal_signal_pending(current))
2009 ret = -EINTR;
2010 else
2011 goto next;
2012out:
2013 if (ret == 1)
2014 ret = 0;
2015
2016 inode_unlock(inode);
2017 return ret;
2018}
2019
2020static inline loff_t f2fs_readpage_limit(struct inode *inode)
2021{
2022 if (IS_ENABLED(CONFIG_FS_VERITY) &&
2023 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
2024 return inode->i_sb->s_maxbytes;
2025
2026 return i_size_read(inode);
2027}
2028
2029static int f2fs_read_single_page(struct inode *inode, struct page *page,
2030 unsigned nr_pages,
2031 struct f2fs_map_blocks *map,
2032 struct bio **bio_ret,
2033 sector_t *last_block_in_bio,
2034 bool is_readahead)
2035{
2036 struct bio *bio = *bio_ret;
2037 const unsigned blocksize = blks_to_bytes(inode, 1);
2038 sector_t block_in_file;
2039 sector_t last_block;
2040 sector_t last_block_in_file;
2041 sector_t block_nr;
2042 int ret = 0;
2043
2044 block_in_file = (sector_t)page_index(page);
2045 last_block = block_in_file + nr_pages;
2046 last_block_in_file = bytes_to_blks(inode,
2047 f2fs_readpage_limit(inode) + blocksize - 1);
2048 if (last_block > last_block_in_file)
2049 last_block = last_block_in_file;
2050
2051
2052 if (block_in_file >= last_block)
2053 goto zero_out;
2054
2055
2056
2057 if ((map->m_flags & F2FS_MAP_MAPPED) &&
2058 block_in_file > map->m_lblk &&
2059 block_in_file < (map->m_lblk + map->m_len))
2060 goto got_it;
2061
2062
2063
2064
2065
2066 map->m_lblk = block_in_file;
2067 map->m_len = last_block - block_in_file;
2068
2069 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
2070 if (ret)
2071 goto out;
2072got_it:
2073 if ((map->m_flags & F2FS_MAP_MAPPED)) {
2074 block_nr = map->m_pblk + block_in_file - map->m_lblk;
2075 SetPageMappedToDisk(page);
2076
2077 if (!PageUptodate(page) && (!PageSwapCache(page) &&
2078 !cleancache_get_page(page))) {
2079 SetPageUptodate(page);
2080 goto confused;
2081 }
2082
2083 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
2084 DATA_GENERIC_ENHANCE_READ)) {
2085 ret = -EFSCORRUPTED;
2086 goto out;
2087 }
2088 } else {
2089zero_out:
2090 zero_user_segment(page, 0, PAGE_SIZE);
2091 if (f2fs_need_verity(inode, page->index) &&
2092 !fsverity_verify_page(page)) {
2093 ret = -EIO;
2094 goto out;
2095 }
2096 if (!PageUptodate(page))
2097 SetPageUptodate(page);
2098 unlock_page(page);
2099 goto out;
2100 }
2101
2102
2103
2104
2105
2106 if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio,
2107 *last_block_in_bio, block_nr) ||
2108 !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
2109submit_and_realloc:
2110 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2111 bio = NULL;
2112 }
2113 if (bio == NULL) {
2114 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
2115 is_readahead ? REQ_RAHEAD : 0, page->index,
2116 false);
2117 if (IS_ERR(bio)) {
2118 ret = PTR_ERR(bio);
2119 bio = NULL;
2120 goto out;
2121 }
2122 }
2123
2124
2125
2126
2127
2128 f2fs_wait_on_block_writeback(inode, block_nr);
2129
2130 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2131 goto submit_and_realloc;
2132
2133 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
2134 f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
2135 ClearPageError(page);
2136 *last_block_in_bio = block_nr;
2137 goto out;
2138confused:
2139 if (bio) {
2140 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2141 bio = NULL;
2142 }
2143 unlock_page(page);
2144out:
2145 *bio_ret = bio;
2146 return ret;
2147}
2148
2149#ifdef CONFIG_F2FS_FS_COMPRESSION
2150int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2151 unsigned nr_pages, sector_t *last_block_in_bio,
2152 bool is_readahead, bool for_write)
2153{
2154 struct dnode_of_data dn;
2155 struct inode *inode = cc->inode;
2156 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2157 struct bio *bio = *bio_ret;
2158 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2159 sector_t last_block_in_file;
2160 const unsigned blocksize = blks_to_bytes(inode, 1);
2161 struct decompress_io_ctx *dic = NULL;
2162 struct extent_info ei = {0, };
2163 bool from_dnode = true;
2164 int i;
2165 int ret = 0;
2166
2167 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2168
2169 last_block_in_file = bytes_to_blks(inode,
2170 f2fs_readpage_limit(inode) + blocksize - 1);
2171
2172
2173 for (i = 0; i < cc->cluster_size; i++) {
2174 struct page *page = cc->rpages[i];
2175
2176 if (!page)
2177 continue;
2178 if ((sector_t)page->index >= last_block_in_file) {
2179 zero_user_segment(page, 0, PAGE_SIZE);
2180 if (!PageUptodate(page))
2181 SetPageUptodate(page);
2182 } else if (!PageUptodate(page)) {
2183 continue;
2184 }
2185 unlock_page(page);
2186 if (for_write)
2187 put_page(page);
2188 cc->rpages[i] = NULL;
2189 cc->nr_rpages--;
2190 }
2191
2192
2193 if (f2fs_cluster_is_empty(cc))
2194 goto out;
2195
2196 if (f2fs_lookup_extent_cache(inode, start_idx, &ei))
2197 from_dnode = false;
2198
2199 if (!from_dnode)
2200 goto skip_reading_dnode;
2201
2202 set_new_dnode(&dn, inode, NULL, NULL, 0);
2203 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2204 if (ret)
2205 goto out;
2206
2207 f2fs_bug_on(sbi, dn.data_blkaddr != COMPRESS_ADDR);
2208
2209skip_reading_dnode:
2210 for (i = 1; i < cc->cluster_size; i++) {
2211 block_t blkaddr;
2212
2213 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_page,
2214 dn.ofs_in_node + i) :
2215 ei.blk + i - 1;
2216
2217 if (!__is_valid_data_blkaddr(blkaddr))
2218 break;
2219
2220 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2221 ret = -EFAULT;
2222 goto out_put_dnode;
2223 }
2224 cc->nr_cpages++;
2225
2226 if (!from_dnode && i >= ei.c_len)
2227 break;
2228 }
2229
2230
2231 if (cc->nr_cpages == 0) {
2232 ret = 0;
2233 goto out_put_dnode;
2234 }
2235
2236 dic = f2fs_alloc_dic(cc);
2237 if (IS_ERR(dic)) {
2238 ret = PTR_ERR(dic);
2239 goto out_put_dnode;
2240 }
2241
2242 for (i = 0; i < cc->nr_cpages; i++) {
2243 struct page *page = dic->cpages[i];
2244 block_t blkaddr;
2245 struct bio_post_read_ctx *ctx;
2246
2247 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_page,
2248 dn.ofs_in_node + i + 1) :
2249 ei.blk + i;
2250
2251 f2fs_wait_on_block_writeback(inode, blkaddr);
2252
2253 if (f2fs_load_compressed_page(sbi, page, blkaddr)) {
2254 if (atomic_dec_and_test(&dic->remaining_pages))
2255 f2fs_decompress_cluster(dic);
2256 continue;
2257 }
2258
2259 if (bio && (!page_is_mergeable(sbi, bio,
2260 *last_block_in_bio, blkaddr) ||
2261 !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
2262submit_and_realloc:
2263 __submit_bio(sbi, bio, DATA);
2264 bio = NULL;
2265 }
2266
2267 if (!bio) {
2268 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2269 is_readahead ? REQ_RAHEAD : 0,
2270 page->index, for_write);
2271 if (IS_ERR(bio)) {
2272 ret = PTR_ERR(bio);
2273 f2fs_decompress_end_io(dic, ret);
2274 f2fs_put_dnode(&dn);
2275 *bio_ret = NULL;
2276 return ret;
2277 }
2278 }
2279
2280 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2281 goto submit_and_realloc;
2282
2283 ctx = get_post_read_ctx(bio);
2284 ctx->enabled_steps |= STEP_DECOMPRESS;
2285 refcount_inc(&dic->refcnt);
2286
2287 inc_page_count(sbi, F2FS_RD_DATA);
2288 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
2289 f2fs_update_iostat(sbi, FS_CDATA_READ_IO, F2FS_BLKSIZE);
2290 ClearPageError(page);
2291 *last_block_in_bio = blkaddr;
2292 }
2293
2294 if (from_dnode)
2295 f2fs_put_dnode(&dn);
2296
2297 *bio_ret = bio;
2298 return 0;
2299
2300out_put_dnode:
2301 if (from_dnode)
2302 f2fs_put_dnode(&dn);
2303out:
2304 for (i = 0; i < cc->cluster_size; i++) {
2305 if (cc->rpages[i]) {
2306 ClearPageUptodate(cc->rpages[i]);
2307 ClearPageError(cc->rpages[i]);
2308 unlock_page(cc->rpages[i]);
2309 }
2310 }
2311 *bio_ret = bio;
2312 return ret;
2313}
2314#endif
2315
2316
2317
2318
2319
2320static int f2fs_mpage_readpages(struct inode *inode,
2321 struct readahead_control *rac, struct page *page)
2322{
2323 struct bio *bio = NULL;
2324 sector_t last_block_in_bio = 0;
2325 struct f2fs_map_blocks map;
2326#ifdef CONFIG_F2FS_FS_COMPRESSION
2327 struct compress_ctx cc = {
2328 .inode = inode,
2329 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2330 .cluster_size = F2FS_I(inode)->i_cluster_size,
2331 .cluster_idx = NULL_CLUSTER,
2332 .rpages = NULL,
2333 .cpages = NULL,
2334 .nr_rpages = 0,
2335 .nr_cpages = 0,
2336 };
2337 pgoff_t nc_cluster_idx = NULL_CLUSTER;
2338#endif
2339 unsigned nr_pages = rac ? readahead_count(rac) : 1;
2340 unsigned max_nr_pages = nr_pages;
2341 int ret = 0;
2342
2343 map.m_pblk = 0;
2344 map.m_lblk = 0;
2345 map.m_len = 0;
2346 map.m_flags = 0;
2347 map.m_next_pgofs = NULL;
2348 map.m_next_extent = NULL;
2349 map.m_seg_type = NO_CHECK_TYPE;
2350 map.m_may_create = false;
2351
2352 for (; nr_pages; nr_pages--) {
2353 if (rac) {
2354 page = readahead_page(rac);
2355 prefetchw(&page->flags);
2356 }
2357
2358#ifdef CONFIG_F2FS_FS_COMPRESSION
2359 if (f2fs_compressed_file(inode)) {
2360
2361 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2362 ret = f2fs_read_multi_pages(&cc, &bio,
2363 max_nr_pages,
2364 &last_block_in_bio,
2365 rac != NULL, false);
2366 f2fs_destroy_compress_ctx(&cc, false);
2367 if (ret)
2368 goto set_error_page;
2369 }
2370 if (cc.cluster_idx == NULL_CLUSTER) {
2371 if (nc_cluster_idx ==
2372 page->index >> cc.log_cluster_size) {
2373 goto read_single_page;
2374 }
2375
2376 ret = f2fs_is_compressed_cluster(inode, page->index);
2377 if (ret < 0)
2378 goto set_error_page;
2379 else if (!ret) {
2380 nc_cluster_idx =
2381 page->index >> cc.log_cluster_size;
2382 goto read_single_page;
2383 }
2384
2385 nc_cluster_idx = NULL_CLUSTER;
2386 }
2387 ret = f2fs_init_compress_ctx(&cc);
2388 if (ret)
2389 goto set_error_page;
2390
2391 f2fs_compress_ctx_add_page(&cc, page);
2392
2393 goto next_page;
2394 }
2395read_single_page:
2396#endif
2397
2398 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
2399 &bio, &last_block_in_bio, rac);
2400 if (ret) {
2401#ifdef CONFIG_F2FS_FS_COMPRESSION
2402set_error_page:
2403#endif
2404 SetPageError(page);
2405 zero_user_segment(page, 0, PAGE_SIZE);
2406 unlock_page(page);
2407 }
2408#ifdef CONFIG_F2FS_FS_COMPRESSION
2409next_page:
2410#endif
2411 if (rac)
2412 put_page(page);
2413
2414#ifdef CONFIG_F2FS_FS_COMPRESSION
2415 if (f2fs_compressed_file(inode)) {
2416
2417 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2418 ret = f2fs_read_multi_pages(&cc, &bio,
2419 max_nr_pages,
2420 &last_block_in_bio,
2421 rac != NULL, false);
2422 f2fs_destroy_compress_ctx(&cc, false);
2423 }
2424 }
2425#endif
2426 }
2427 if (bio)
2428 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2429 return ret;
2430}
2431
2432static int f2fs_read_data_page(struct file *file, struct page *page)
2433{
2434 struct inode *inode = page_file_mapping(page)->host;
2435 int ret = -EAGAIN;
2436
2437 trace_f2fs_readpage(page, DATA);
2438
2439 if (!f2fs_is_compress_backend_ready(inode)) {
2440 unlock_page(page);
2441 return -EOPNOTSUPP;
2442 }
2443
2444
2445 if (f2fs_has_inline_data(inode))
2446 ret = f2fs_read_inline_data(inode, page);
2447 if (ret == -EAGAIN)
2448 ret = f2fs_mpage_readpages(inode, NULL, page);
2449 return ret;
2450}
2451
2452static void f2fs_readahead(struct readahead_control *rac)
2453{
2454 struct inode *inode = rac->mapping->host;
2455
2456 trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac));
2457
2458 if (!f2fs_is_compress_backend_ready(inode))
2459 return;
2460
2461
2462 if (f2fs_has_inline_data(inode))
2463 return;
2464
2465 f2fs_mpage_readpages(inode, rac, NULL);
2466}
2467
2468int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
2469{
2470 struct inode *inode = fio->page->mapping->host;
2471 struct page *mpage, *page;
2472 gfp_t gfp_flags = GFP_NOFS;
2473
2474 if (!f2fs_encrypted_file(inode))
2475 return 0;
2476
2477 page = fio->compressed_page ? fio->compressed_page : fio->page;
2478
2479
2480 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
2481
2482 if (fscrypt_inode_uses_inline_crypto(inode))
2483 return 0;
2484
2485retry_encrypt:
2486 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2487 PAGE_SIZE, 0, gfp_flags);
2488 if (IS_ERR(fio->encrypted_page)) {
2489
2490 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2491 f2fs_flush_merged_writes(fio->sbi);
2492 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
2493 gfp_flags |= __GFP_NOFAIL;
2494 goto retry_encrypt;
2495 }
2496 return PTR_ERR(fio->encrypted_page);
2497 }
2498
2499 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2500 if (mpage) {
2501 if (PageUptodate(mpage))
2502 memcpy(page_address(mpage),
2503 page_address(fio->encrypted_page), PAGE_SIZE);
2504 f2fs_put_page(mpage, 1);
2505 }
2506 return 0;
2507}
2508
2509static inline bool check_inplace_update_policy(struct inode *inode,
2510 struct f2fs_io_info *fio)
2511{
2512 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2513 unsigned int policy = SM_I(sbi)->ipu_policy;
2514
2515 if (policy & (0x1 << F2FS_IPU_FORCE))
2516 return true;
2517 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
2518 return true;
2519 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2520 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2521 return true;
2522 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
2523 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2524 return true;
2525
2526
2527
2528
2529 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2530 fio && fio->op == REQ_OP_WRITE &&
2531 !(fio->op_flags & REQ_SYNC) &&
2532 !IS_ENCRYPTED(inode))
2533 return true;
2534
2535
2536 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2537 is_inode_flag_set(inode, FI_NEED_IPU))
2538 return true;
2539
2540 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2541 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2542 return true;
2543
2544 return false;
2545}
2546
2547bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
2548{
2549
2550 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
2551 return false;
2552
2553 if (f2fs_is_pinned_file(inode))
2554 return true;
2555
2556
2557 if (file_is_cold(inode))
2558 return true;
2559
2560 return check_inplace_update_policy(inode, fio);
2561}
2562
2563bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
2564{
2565 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2566
2567 if (f2fs_lfs_mode(sbi))
2568 return true;
2569 if (S_ISDIR(inode->i_mode))
2570 return true;
2571 if (IS_NOQUOTA(inode))
2572 return true;
2573 if (f2fs_is_atomic_file(inode))
2574 return true;
2575 if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
2576 return true;
2577
2578
2579 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
2580 return true;
2581
2582 if (fio) {
2583 if (page_private_gcing(fio->page))
2584 return true;
2585 if (page_private_dummy(fio->page))
2586 return true;
2587 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2588 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2589 return true;
2590 }
2591 return false;
2592}
2593
2594static inline bool need_inplace_update(struct f2fs_io_info *fio)
2595{
2596 struct inode *inode = fio->page->mapping->host;
2597
2598 if (f2fs_should_update_outplace(inode, fio))
2599 return false;
2600
2601 return f2fs_should_update_inplace(inode, fio);
2602}
2603
2604int f2fs_do_write_data_page(struct f2fs_io_info *fio)
2605{
2606 struct page *page = fio->page;
2607 struct inode *inode = page->mapping->host;
2608 struct dnode_of_data dn;
2609 struct extent_info ei = {0, };
2610 struct node_info ni;
2611 bool ipu_force = false;
2612 int err = 0;
2613
2614 set_new_dnode(&dn, inode, NULL, NULL, 0);
2615 if (need_inplace_update(fio) &&
2616 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2617 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
2618
2619 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
2620 DATA_GENERIC_ENHANCE))
2621 return -EFSCORRUPTED;
2622
2623 ipu_force = true;
2624 fio->need_lock = LOCK_DONE;
2625 goto got_it;
2626 }
2627
2628
2629 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2630 return -EAGAIN;
2631
2632 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
2633 if (err)
2634 goto out;
2635
2636 fio->old_blkaddr = dn.data_blkaddr;
2637
2638
2639 if (fio->old_blkaddr == NULL_ADDR) {
2640 ClearPageUptodate(page);
2641 clear_page_private_gcing(page);
2642 goto out_writepage;
2643 }
2644got_it:
2645 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2646 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
2647 DATA_GENERIC_ENHANCE)) {
2648 err = -EFSCORRUPTED;
2649 goto out_writepage;
2650 }
2651
2652
2653
2654
2655 if (ipu_force ||
2656 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2657 need_inplace_update(fio))) {
2658 err = f2fs_encrypt_one_page(fio);
2659 if (err)
2660 goto out_writepage;
2661
2662 set_page_writeback(page);
2663 ClearPageError(page);
2664 f2fs_put_dnode(&dn);
2665 if (fio->need_lock == LOCK_REQ)
2666 f2fs_unlock_op(fio->sbi);
2667 err = f2fs_inplace_write_data(fio);
2668 if (err) {
2669 if (fscrypt_inode_uses_fs_layer_crypto(inode))
2670 fscrypt_finalize_bounce_page(&fio->encrypted_page);
2671 if (PageWriteback(page))
2672 end_page_writeback(page);
2673 } else {
2674 set_inode_flag(inode, FI_UPDATE_WRITE);
2675 }
2676 trace_f2fs_do_write_data_page(fio->page, IPU);
2677 return err;
2678 }
2679
2680 if (fio->need_lock == LOCK_RETRY) {
2681 if (!f2fs_trylock_op(fio->sbi)) {
2682 err = -EAGAIN;
2683 goto out_writepage;
2684 }
2685 fio->need_lock = LOCK_REQ;
2686 }
2687
2688 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2689 if (err)
2690 goto out_writepage;
2691
2692 fio->version = ni.version;
2693
2694 err = f2fs_encrypt_one_page(fio);
2695 if (err)
2696 goto out_writepage;
2697
2698 set_page_writeback(page);
2699 ClearPageError(page);
2700
2701 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2702 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2703
2704
2705 f2fs_outplace_write_data(&dn, fio);
2706 trace_f2fs_do_write_data_page(page, OPU);
2707 set_inode_flag(inode, FI_APPEND_WRITE);
2708 if (page->index == 0)
2709 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
2710out_writepage:
2711 f2fs_put_dnode(&dn);
2712out:
2713 if (fio->need_lock == LOCK_REQ)
2714 f2fs_unlock_op(fio->sbi);
2715 return err;
2716}
2717
2718int f2fs_write_single_data_page(struct page *page, int *submitted,
2719 struct bio **bio,
2720 sector_t *last_block,
2721 struct writeback_control *wbc,
2722 enum iostat_type io_type,
2723 int compr_blocks,
2724 bool allow_balance)
2725{
2726 struct inode *inode = page->mapping->host;
2727 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2728 loff_t i_size = i_size_read(inode);
2729 const pgoff_t end_index = ((unsigned long long)i_size)
2730 >> PAGE_SHIFT;
2731 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
2732 unsigned offset = 0;
2733 bool need_balance_fs = false;
2734 int err = 0;
2735 struct f2fs_io_info fio = {
2736 .sbi = sbi,
2737 .ino = inode->i_ino,
2738 .type = DATA,
2739 .op = REQ_OP_WRITE,
2740 .op_flags = wbc_to_write_flags(wbc),
2741 .old_blkaddr = NULL_ADDR,
2742 .page = page,
2743 .encrypted_page = NULL,
2744 .submitted = false,
2745 .compr_blocks = compr_blocks,
2746 .need_lock = LOCK_RETRY,
2747 .io_type = io_type,
2748 .io_wbc = wbc,
2749 .bio = bio,
2750 .last_block = last_block,
2751 };
2752
2753 trace_f2fs_writepage(page, DATA);
2754
2755
2756 if (unlikely(f2fs_cp_error(sbi))) {
2757 mapping_set_error(page->mapping, -EIO);
2758
2759
2760
2761
2762 if (S_ISDIR(inode->i_mode))
2763 goto redirty_out;
2764 goto out;
2765 }
2766
2767 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2768 goto redirty_out;
2769
2770 if (page->index < end_index ||
2771 f2fs_verity_in_progress(inode) ||
2772 compr_blocks)
2773 goto write;
2774
2775
2776
2777
2778
2779 offset = i_size & (PAGE_SIZE - 1);
2780 if ((page->index >= end_index + 1) || !offset)
2781 goto out;
2782
2783 zero_user_segment(page, offset, PAGE_SIZE);
2784write:
2785 if (f2fs_is_drop_cache(inode))
2786 goto out;
2787
2788 if (f2fs_is_volatile_file(inode) && (!page->index ||
2789 (!wbc->for_reclaim &&
2790 f2fs_available_free_memory(sbi, BASE_CHECK))))
2791 goto redirty_out;
2792
2793
2794 if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
2795
2796
2797
2798
2799
2800 if (IS_NOQUOTA(inode))
2801 down_read(&sbi->node_write);
2802
2803 fio.need_lock = LOCK_DONE;
2804 err = f2fs_do_write_data_page(&fio);
2805
2806 if (IS_NOQUOTA(inode))
2807 up_read(&sbi->node_write);
2808
2809 goto done;
2810 }
2811
2812 if (!wbc->for_reclaim)
2813 need_balance_fs = true;
2814 else if (has_not_enough_free_secs(sbi, 0, 0))
2815 goto redirty_out;
2816 else
2817 set_inode_flag(inode, FI_HOT_DATA);
2818
2819 err = -EAGAIN;
2820 if (f2fs_has_inline_data(inode)) {
2821 err = f2fs_write_inline_data(inode, page);
2822 if (!err)
2823 goto out;
2824 }
2825
2826 if (err == -EAGAIN) {
2827 err = f2fs_do_write_data_page(&fio);
2828 if (err == -EAGAIN) {
2829 fio.need_lock = LOCK_REQ;
2830 err = f2fs_do_write_data_page(&fio);
2831 }
2832 }
2833
2834 if (err) {
2835 file_set_keep_isize(inode);
2836 } else {
2837 spin_lock(&F2FS_I(inode)->i_size_lock);
2838 if (F2FS_I(inode)->last_disk_size < psize)
2839 F2FS_I(inode)->last_disk_size = psize;
2840 spin_unlock(&F2FS_I(inode)->i_size_lock);
2841 }
2842
2843done:
2844 if (err && err != -ENOENT)
2845 goto redirty_out;
2846
2847out:
2848 inode_dec_dirty_pages(inode);
2849 if (err) {
2850 ClearPageUptodate(page);
2851 clear_page_private_gcing(page);
2852 }
2853
2854 if (wbc->for_reclaim) {
2855 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
2856 clear_inode_flag(inode, FI_HOT_DATA);
2857 f2fs_remove_dirty_inode(inode);
2858 submitted = NULL;
2859 }
2860 unlock_page(page);
2861 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
2862 !F2FS_I(inode)->cp_task && allow_balance)
2863 f2fs_balance_fs(sbi, need_balance_fs);
2864
2865 if (unlikely(f2fs_cp_error(sbi))) {
2866 f2fs_submit_merged_write(sbi, DATA);
2867 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
2868 submitted = NULL;
2869 }
2870
2871 if (submitted)
2872 *submitted = fio.submitted ? 1 : 0;
2873
2874 return 0;
2875
2876redirty_out:
2877 redirty_page_for_writepage(wbc, page);
2878
2879
2880
2881
2882
2883
2884 if (!err || wbc->for_reclaim)
2885 return AOP_WRITEPAGE_ACTIVATE;
2886 unlock_page(page);
2887 return err;
2888}
2889
2890static int f2fs_write_data_page(struct page *page,
2891 struct writeback_control *wbc)
2892{
2893#ifdef CONFIG_F2FS_FS_COMPRESSION
2894 struct inode *inode = page->mapping->host;
2895
2896 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2897 goto out;
2898
2899 if (f2fs_compressed_file(inode)) {
2900 if (f2fs_is_compressed_cluster(inode, page->index)) {
2901 redirty_page_for_writepage(wbc, page);
2902 return AOP_WRITEPAGE_ACTIVATE;
2903 }
2904 }
2905out:
2906#endif
2907
2908 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
2909 wbc, FS_DATA_IO, 0, true);
2910}
2911
2912
2913
2914
2915
2916
2917static int f2fs_write_cache_pages(struct address_space *mapping,
2918 struct writeback_control *wbc,
2919 enum iostat_type io_type)
2920{
2921 int ret = 0;
2922 int done = 0, retry = 0;
2923 struct pagevec pvec;
2924 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
2925 struct bio *bio = NULL;
2926 sector_t last_block;
2927#ifdef CONFIG_F2FS_FS_COMPRESSION
2928 struct inode *inode = mapping->host;
2929 struct compress_ctx cc = {
2930 .inode = inode,
2931 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2932 .cluster_size = F2FS_I(inode)->i_cluster_size,
2933 .cluster_idx = NULL_CLUSTER,
2934 .rpages = NULL,
2935 .nr_rpages = 0,
2936 .cpages = NULL,
2937 .rbuf = NULL,
2938 .cbuf = NULL,
2939 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2940 .private = NULL,
2941 };
2942#endif
2943 int nr_pages;
2944 pgoff_t index;
2945 pgoff_t end;
2946 pgoff_t done_index;
2947 int range_whole = 0;
2948 xa_mark_t tag;
2949 int nwritten = 0;
2950 int submitted = 0;
2951 int i;
2952
2953 pagevec_init(&pvec);
2954
2955 if (get_dirty_pages(mapping->host) <=
2956 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2957 set_inode_flag(mapping->host, FI_HOT_DATA);
2958 else
2959 clear_inode_flag(mapping->host, FI_HOT_DATA);
2960
2961 if (wbc->range_cyclic) {
2962 index = mapping->writeback_index;
2963 end = -1;
2964 } else {
2965 index = wbc->range_start >> PAGE_SHIFT;
2966 end = wbc->range_end >> PAGE_SHIFT;
2967 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2968 range_whole = 1;
2969 }
2970 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2971 tag = PAGECACHE_TAG_TOWRITE;
2972 else
2973 tag = PAGECACHE_TAG_DIRTY;
2974retry:
2975 retry = 0;
2976 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2977 tag_pages_for_writeback(mapping, index, end);
2978 done_index = index;
2979 while (!done && !retry && (index <= end)) {
2980 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
2981 tag);
2982 if (nr_pages == 0)
2983 break;
2984
2985 for (i = 0; i < nr_pages; i++) {
2986 struct page *page = pvec.pages[i];
2987 bool need_readd;
2988readd:
2989 need_readd = false;
2990#ifdef CONFIG_F2FS_FS_COMPRESSION
2991 if (f2fs_compressed_file(inode)) {
2992 ret = f2fs_init_compress_ctx(&cc);
2993 if (ret) {
2994 done = 1;
2995 break;
2996 }
2997
2998 if (!f2fs_cluster_can_merge_page(&cc,
2999 page->index)) {
3000 ret = f2fs_write_multi_pages(&cc,
3001 &submitted, wbc, io_type);
3002 if (!ret)
3003 need_readd = true;
3004 goto result;
3005 }
3006
3007 if (unlikely(f2fs_cp_error(sbi)))
3008 goto lock_page;
3009
3010 if (f2fs_cluster_is_empty(&cc)) {
3011 void *fsdata = NULL;
3012 struct page *pagep;
3013 int ret2;
3014
3015 ret2 = f2fs_prepare_compress_overwrite(
3016 inode, &pagep,
3017 page->index, &fsdata);
3018 if (ret2 < 0) {
3019 ret = ret2;
3020 done = 1;
3021 break;
3022 } else if (ret2 &&
3023 !f2fs_compress_write_end(inode,
3024 fsdata, page->index,
3025 1)) {
3026 retry = 1;
3027 break;
3028 }
3029 } else {
3030 goto lock_page;
3031 }
3032 }
3033#endif
3034
3035 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
3036 wbc->sync_mode == WB_SYNC_NONE) {
3037 done = 1;
3038 break;
3039 }
3040#ifdef CONFIG_F2FS_FS_COMPRESSION
3041lock_page:
3042#endif
3043 done_index = page->index;
3044retry_write:
3045 lock_page(page);
3046
3047 if (unlikely(page->mapping != mapping)) {
3048continue_unlock:
3049 unlock_page(page);
3050 continue;
3051 }
3052
3053 if (!PageDirty(page)) {
3054
3055 goto continue_unlock;
3056 }
3057
3058 if (PageWriteback(page)) {
3059 if (wbc->sync_mode != WB_SYNC_NONE)
3060 f2fs_wait_on_page_writeback(page,
3061 DATA, true, true);
3062 else
3063 goto continue_unlock;
3064 }
3065
3066 if (!clear_page_dirty_for_io(page))
3067 goto continue_unlock;
3068
3069#ifdef CONFIG_F2FS_FS_COMPRESSION
3070 if (f2fs_compressed_file(inode)) {
3071 get_page(page);
3072 f2fs_compress_ctx_add_page(&cc, page);
3073 continue;
3074 }
3075#endif
3076 ret = f2fs_write_single_data_page(page, &submitted,
3077 &bio, &last_block, wbc, io_type,
3078 0, true);
3079 if (ret == AOP_WRITEPAGE_ACTIVATE)
3080 unlock_page(page);
3081#ifdef CONFIG_F2FS_FS_COMPRESSION
3082result:
3083#endif
3084 nwritten += submitted;
3085 wbc->nr_to_write -= submitted;
3086
3087 if (unlikely(ret)) {
3088
3089
3090
3091
3092 if (ret == AOP_WRITEPAGE_ACTIVATE) {
3093 ret = 0;
3094 goto next;
3095 } else if (ret == -EAGAIN) {
3096 ret = 0;
3097 if (wbc->sync_mode == WB_SYNC_ALL) {
3098 cond_resched();
3099 congestion_wait(BLK_RW_ASYNC,
3100 DEFAULT_IO_TIMEOUT);
3101 goto retry_write;
3102 }
3103 goto next;
3104 }
3105 done_index = page->index + 1;
3106 done = 1;
3107 break;
3108 }
3109
3110 if (wbc->nr_to_write <= 0 &&
3111 wbc->sync_mode == WB_SYNC_NONE) {
3112 done = 1;
3113 break;
3114 }
3115next:
3116 if (need_readd)
3117 goto readd;
3118 }
3119 pagevec_release(&pvec);
3120 cond_resched();
3121 }
3122#ifdef CONFIG_F2FS_FS_COMPRESSION
3123
3124 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
3125 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
3126 nwritten += submitted;
3127 wbc->nr_to_write -= submitted;
3128 if (ret) {
3129 done = 1;
3130 retry = 0;
3131 }
3132 }
3133 if (f2fs_compressed_file(inode))
3134 f2fs_destroy_compress_ctx(&cc, false);
3135#endif
3136 if (retry) {
3137 index = 0;
3138 end = -1;
3139 goto retry;
3140 }
3141 if (wbc->range_cyclic && !done)
3142 done_index = 0;
3143 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
3144 mapping->writeback_index = done_index;
3145
3146 if (nwritten)
3147 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
3148 NULL, 0, DATA);
3149
3150 if (bio)
3151 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
3152
3153 return ret;
3154}
3155
3156static inline bool __should_serialize_io(struct inode *inode,
3157 struct writeback_control *wbc)
3158{
3159
3160 if (F2FS_I(inode)->cp_task)
3161 return false;
3162
3163 if (!S_ISREG(inode->i_mode))
3164 return false;
3165 if (IS_NOQUOTA(inode))
3166 return false;
3167
3168 if (f2fs_need_compress_data(inode))
3169 return true;
3170 if (wbc->sync_mode != WB_SYNC_ALL)
3171 return true;
3172 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
3173 return true;
3174 return false;
3175}
3176
3177static int __f2fs_write_data_pages(struct address_space *mapping,
3178 struct writeback_control *wbc,
3179 enum iostat_type io_type)
3180{
3181 struct inode *inode = mapping->host;
3182 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3183 struct blk_plug plug;
3184 int ret;
3185 bool locked = false;
3186
3187
3188 if (!mapping->a_ops->writepage)
3189 return 0;
3190
3191
3192 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3193 return 0;
3194
3195
3196 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3197 goto skip_write;
3198
3199 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3200 wbc->sync_mode == WB_SYNC_NONE &&
3201 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
3202 f2fs_available_free_memory(sbi, DIRTY_DENTS))
3203 goto skip_write;
3204
3205
3206 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
3207 goto skip_write;
3208
3209 trace_f2fs_writepages(mapping->host, wbc, DATA);
3210
3211
3212 if (wbc->sync_mode == WB_SYNC_ALL)
3213 atomic_inc(&sbi->wb_sync_req[DATA]);
3214 else if (atomic_read(&sbi->wb_sync_req[DATA]))
3215 goto skip_write;
3216
3217 if (__should_serialize_io(inode, wbc)) {
3218 mutex_lock(&sbi->writepages);
3219 locked = true;
3220 }
3221
3222 blk_start_plug(&plug);
3223 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
3224 blk_finish_plug(&plug);
3225
3226 if (locked)
3227 mutex_unlock(&sbi->writepages);
3228
3229 if (wbc->sync_mode == WB_SYNC_ALL)
3230 atomic_dec(&sbi->wb_sync_req[DATA]);
3231
3232
3233
3234
3235
3236 f2fs_remove_dirty_inode(inode);
3237 return ret;
3238
3239skip_write:
3240 wbc->pages_skipped += get_dirty_pages(inode);
3241 trace_f2fs_writepages(mapping->host, wbc, DATA);
3242 return 0;
3243}
3244
3245static int f2fs_write_data_pages(struct address_space *mapping,
3246 struct writeback_control *wbc)
3247{
3248 struct inode *inode = mapping->host;
3249
3250 return __f2fs_write_data_pages(mapping, wbc,
3251 F2FS_I(inode)->cp_task == current ?
3252 FS_CP_DATA_IO : FS_DATA_IO);
3253}
3254
3255static void f2fs_write_failed(struct inode *inode, loff_t to)
3256{
3257 loff_t i_size = i_size_read(inode);
3258
3259 if (IS_NOQUOTA(inode))
3260 return;
3261
3262
3263 if (to > i_size && !f2fs_verity_in_progress(inode)) {
3264 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3265 filemap_invalidate_lock(inode->i_mapping);
3266
3267 truncate_pagecache(inode, i_size);
3268 f2fs_truncate_blocks(inode, i_size, true);
3269
3270 filemap_invalidate_unlock(inode->i_mapping);
3271 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3272 }
3273}
3274
3275static int prepare_write_begin(struct f2fs_sb_info *sbi,
3276 struct page *page, loff_t pos, unsigned len,
3277 block_t *blk_addr, bool *node_changed)
3278{
3279 struct inode *inode = page->mapping->host;
3280 pgoff_t index = page->index;
3281 struct dnode_of_data dn;
3282 struct page *ipage;
3283 bool locked = false;
3284 struct extent_info ei = {0, };
3285 int err = 0;
3286 int flag;
3287
3288
3289
3290
3291
3292 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
3293 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
3294 !f2fs_verity_in_progress(inode))
3295 return 0;
3296
3297
3298 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3299 flag = F2FS_GET_BLOCK_DEFAULT;
3300 else
3301 flag = F2FS_GET_BLOCK_PRE_AIO;
3302
3303 if (f2fs_has_inline_data(inode) ||
3304 (pos & PAGE_MASK) >= i_size_read(inode)) {
3305 f2fs_do_map_lock(sbi, flag, true);
3306 locked = true;
3307 }
3308
3309restart:
3310
3311 ipage = f2fs_get_node_page(sbi, inode->i_ino);
3312 if (IS_ERR(ipage)) {
3313 err = PTR_ERR(ipage);
3314 goto unlock_out;
3315 }
3316
3317 set_new_dnode(&dn, inode, ipage, ipage, 0);
3318
3319 if (f2fs_has_inline_data(inode)) {
3320 if (pos + len <= MAX_INLINE_DATA(inode)) {
3321 f2fs_do_read_inline_data(page, ipage);
3322 set_inode_flag(inode, FI_DATA_EXIST);
3323 if (inode->i_nlink)
3324 set_page_private_inline(ipage);
3325 } else {
3326 err = f2fs_convert_inline_page(&dn, page);
3327 if (err)
3328 goto out;
3329 if (dn.data_blkaddr == NULL_ADDR)
3330 err = f2fs_get_block(&dn, index);
3331 }
3332 } else if (locked) {
3333 err = f2fs_get_block(&dn, index);
3334 } else {
3335 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3336 dn.data_blkaddr = ei.blk + index - ei.fofs;
3337 } else {
3338
3339 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
3340 if (err || dn.data_blkaddr == NULL_ADDR) {
3341 f2fs_put_dnode(&dn);
3342 f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
3343 true);
3344 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
3345 locked = true;
3346 goto restart;
3347 }
3348 }
3349 }
3350
3351
3352 *blk_addr = dn.data_blkaddr;
3353 *node_changed = dn.node_changed;
3354out:
3355 f2fs_put_dnode(&dn);
3356unlock_out:
3357 if (locked)
3358 f2fs_do_map_lock(sbi, flag, false);
3359 return err;
3360}
3361
3362static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3363 loff_t pos, unsigned len, unsigned flags,
3364 struct page **pagep, void **fsdata)
3365{
3366 struct inode *inode = mapping->host;
3367 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3368 struct page *page = NULL;
3369 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
3370 bool need_balance = false, drop_atomic = false;
3371 block_t blkaddr = NULL_ADDR;
3372 int err = 0;
3373
3374 trace_f2fs_write_begin(inode, pos, len, flags);
3375
3376 if (!f2fs_is_checkpoint_ready(sbi)) {
3377 err = -ENOSPC;
3378 goto fail;
3379 }
3380
3381 if ((f2fs_is_atomic_file(inode) &&
3382 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3383 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
3384 err = -ENOMEM;
3385 drop_atomic = true;
3386 goto fail;
3387 }
3388
3389
3390
3391
3392
3393
3394 if (index != 0) {
3395 err = f2fs_convert_inline_inode(inode);
3396 if (err)
3397 goto fail;
3398 }
3399
3400#ifdef CONFIG_F2FS_FS_COMPRESSION
3401 if (f2fs_compressed_file(inode)) {
3402 int ret;
3403
3404 *fsdata = NULL;
3405
3406 if (len == PAGE_SIZE)
3407 goto repeat;
3408
3409 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3410 index, fsdata);
3411 if (ret < 0) {
3412 err = ret;
3413 goto fail;
3414 } else if (ret) {
3415 return 0;
3416 }
3417 }
3418#endif
3419
3420repeat:
3421
3422
3423
3424
3425 page = f2fs_pagecache_get_page(mapping, index,
3426 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3427 if (!page) {
3428 err = -ENOMEM;
3429 goto fail;
3430 }
3431
3432
3433
3434 *pagep = page;
3435
3436 err = prepare_write_begin(sbi, page, pos, len,
3437 &blkaddr, &need_balance);
3438 if (err)
3439 goto fail;
3440
3441 if (need_balance && !IS_NOQUOTA(inode) &&
3442 has_not_enough_free_secs(sbi, 0, 0)) {
3443 unlock_page(page);
3444 f2fs_balance_fs(sbi, true);
3445 lock_page(page);
3446 if (page->mapping != mapping) {
3447
3448 f2fs_put_page(page, 1);
3449 goto repeat;
3450 }
3451 }
3452
3453 f2fs_wait_on_page_writeback(page, DATA, false, true);
3454
3455 if (len == PAGE_SIZE || PageUptodate(page))
3456 return 0;
3457
3458 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3459 !f2fs_verity_in_progress(inode)) {
3460 zero_user_segment(page, len, PAGE_SIZE);
3461 return 0;
3462 }
3463
3464 if (blkaddr == NEW_ADDR) {
3465 zero_user_segment(page, 0, PAGE_SIZE);
3466 SetPageUptodate(page);
3467 } else {
3468 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3469 DATA_GENERIC_ENHANCE_READ)) {
3470 err = -EFSCORRUPTED;
3471 goto fail;
3472 }
3473 err = f2fs_submit_page_read(inode, page, blkaddr, 0, true);
3474 if (err)
3475 goto fail;
3476
3477 lock_page(page);
3478 if (unlikely(page->mapping != mapping)) {
3479 f2fs_put_page(page, 1);
3480 goto repeat;
3481 }
3482 if (unlikely(!PageUptodate(page))) {
3483 err = -EIO;
3484 goto fail;
3485 }
3486 }
3487 return 0;
3488
3489fail:
3490 f2fs_put_page(page, 1);
3491 f2fs_write_failed(inode, pos + len);
3492 if (drop_atomic)
3493 f2fs_drop_inmem_pages_all(sbi, false);
3494 return err;
3495}
3496
3497static int f2fs_write_end(struct file *file,
3498 struct address_space *mapping,
3499 loff_t pos, unsigned len, unsigned copied,
3500 struct page *page, void *fsdata)
3501{
3502 struct inode *inode = page->mapping->host;
3503
3504 trace_f2fs_write_end(inode, pos, len, copied);
3505
3506
3507
3508
3509
3510
3511 if (!PageUptodate(page)) {
3512 if (unlikely(copied != len))
3513 copied = 0;
3514 else
3515 SetPageUptodate(page);
3516 }
3517
3518#ifdef CONFIG_F2FS_FS_COMPRESSION
3519
3520 if (f2fs_compressed_file(inode) && fsdata) {
3521 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3522 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3523
3524 if (pos + copied > i_size_read(inode) &&
3525 !f2fs_verity_in_progress(inode))
3526 f2fs_i_size_write(inode, pos + copied);
3527 return copied;
3528 }
3529#endif
3530
3531 if (!copied)
3532 goto unlock_out;
3533
3534 set_page_dirty(page);
3535
3536 if (pos + copied > i_size_read(inode) &&
3537 !f2fs_verity_in_progress(inode))
3538 f2fs_i_size_write(inode, pos + copied);
3539unlock_out:
3540 f2fs_put_page(page, 1);
3541 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3542 return copied;
3543}
3544
3545static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
3546 loff_t offset)
3547{
3548 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
3549 unsigned blkbits = i_blkbits;
3550 unsigned blocksize_mask = (1 << blkbits) - 1;
3551 unsigned long align = offset | iov_iter_alignment(iter);
3552 struct block_device *bdev = inode->i_sb->s_bdev;
3553
3554 if (iov_iter_rw(iter) == READ && offset >= i_size_read(inode))
3555 return 1;
3556
3557 if (align & blocksize_mask) {
3558 if (bdev)
3559 blkbits = blksize_bits(bdev_logical_block_size(bdev));
3560 blocksize_mask = (1 << blkbits) - 1;
3561 if (align & blocksize_mask)
3562 return -EINVAL;
3563 return 1;
3564 }
3565 return 0;
3566}
3567
3568static void f2fs_dio_end_io(struct bio *bio)
3569{
3570 struct f2fs_private_dio *dio = bio->bi_private;
3571
3572 dec_page_count(F2FS_I_SB(dio->inode),
3573 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3574
3575 bio->bi_private = dio->orig_private;
3576 bio->bi_end_io = dio->orig_end_io;
3577
3578 kfree(dio);
3579
3580 bio_endio(bio);
3581}
3582
3583static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
3584 loff_t file_offset)
3585{
3586 struct f2fs_private_dio *dio;
3587 bool write = (bio_op(bio) == REQ_OP_WRITE);
3588
3589 dio = f2fs_kzalloc(F2FS_I_SB(inode),
3590 sizeof(struct f2fs_private_dio), GFP_NOFS);
3591 if (!dio)
3592 goto out;
3593
3594 dio->inode = inode;
3595 dio->orig_end_io = bio->bi_end_io;
3596 dio->orig_private = bio->bi_private;
3597 dio->write = write;
3598
3599 bio->bi_end_io = f2fs_dio_end_io;
3600 bio->bi_private = dio;
3601
3602 inc_page_count(F2FS_I_SB(inode),
3603 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3604
3605 submit_bio(bio);
3606 return;
3607out:
3608 bio->bi_status = BLK_STS_IOERR;
3609 bio_endio(bio);
3610}
3611
3612static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
3613{
3614 struct address_space *mapping = iocb->ki_filp->f_mapping;
3615 struct inode *inode = mapping->host;
3616 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3617 struct f2fs_inode_info *fi = F2FS_I(inode);
3618 size_t count = iov_iter_count(iter);
3619 loff_t offset = iocb->ki_pos;
3620 int rw = iov_iter_rw(iter);
3621 int err;
3622 enum rw_hint hint = iocb->ki_hint;
3623 int whint_mode = F2FS_OPTION(sbi).whint_mode;
3624 bool do_opu;
3625
3626 err = check_direct_IO(inode, iter, offset);
3627 if (err)
3628 return err < 0 ? err : 0;
3629
3630 if (f2fs_force_buffered_io(inode, iocb, iter))
3631 return 0;
3632
3633 do_opu = rw == WRITE && f2fs_lfs_mode(sbi);
3634
3635 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
3636
3637 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
3638 iocb->ki_hint = WRITE_LIFE_NOT_SET;
3639
3640 if (iocb->ki_flags & IOCB_NOWAIT) {
3641 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
3642 iocb->ki_hint = hint;
3643 err = -EAGAIN;
3644 goto out;
3645 }
3646 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
3647 up_read(&fi->i_gc_rwsem[rw]);
3648 iocb->ki_hint = hint;
3649 err = -EAGAIN;
3650 goto out;
3651 }
3652 } else {
3653 down_read(&fi->i_gc_rwsem[rw]);
3654 if (do_opu)
3655 down_read(&fi->i_gc_rwsem[READ]);
3656 }
3657
3658 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
3659 iter, rw == WRITE ? get_data_block_dio_write :
3660 get_data_block_dio, NULL, f2fs_dio_submit_bio,
3661 rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
3662 DIO_SKIP_HOLES);
3663
3664 if (do_opu)
3665 up_read(&fi->i_gc_rwsem[READ]);
3666
3667 up_read(&fi->i_gc_rwsem[rw]);
3668
3669 if (rw == WRITE) {
3670 if (whint_mode == WHINT_MODE_OFF)
3671 iocb->ki_hint = hint;
3672 if (err > 0) {
3673 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3674 err);
3675 if (!do_opu)
3676 set_inode_flag(inode, FI_UPDATE_WRITE);
3677 } else if (err == -EIOCBQUEUED) {
3678 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3679 count - iov_iter_count(iter));
3680 } else if (err < 0) {
3681 f2fs_write_failed(inode, offset + count);
3682 }
3683 } else {
3684 if (err > 0)
3685 f2fs_update_iostat(sbi, APP_DIRECT_READ_IO, err);
3686 else if (err == -EIOCBQUEUED)
3687 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_READ_IO,
3688 count - iov_iter_count(iter));
3689 }
3690
3691out:
3692 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
3693
3694 return err;
3695}
3696
3697void f2fs_invalidate_page(struct page *page, unsigned int offset,
3698 unsigned int length)
3699{
3700 struct inode *inode = page->mapping->host;
3701 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3702
3703 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
3704 (offset % PAGE_SIZE || length != PAGE_SIZE))
3705 return;
3706
3707 if (PageDirty(page)) {
3708 if (inode->i_ino == F2FS_META_INO(sbi)) {
3709 dec_page_count(sbi, F2FS_DIRTY_META);
3710 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
3711 dec_page_count(sbi, F2FS_DIRTY_NODES);
3712 } else {
3713 inode_dec_dirty_pages(inode);
3714 f2fs_remove_dirty_inode(inode);
3715 }
3716 }
3717
3718 clear_page_private_gcing(page);
3719
3720 if (test_opt(sbi, COMPRESS_CACHE)) {
3721 if (f2fs_compressed_file(inode))
3722 f2fs_invalidate_compress_pages(sbi, inode->i_ino);
3723 if (inode->i_ino == F2FS_COMPRESS_INO(sbi))
3724 clear_page_private_data(page);
3725 }
3726
3727 if (page_private_atomic(page))
3728 return f2fs_drop_inmem_page(inode, page);
3729
3730 detach_page_private(page);
3731 set_page_private(page, 0);
3732}
3733
3734int f2fs_release_page(struct page *page, gfp_t wait)
3735{
3736
3737 if (PageDirty(page))
3738 return 0;
3739
3740
3741 if (page_private_atomic(page))
3742 return 0;
3743
3744 if (test_opt(F2FS_P_SB(page), COMPRESS_CACHE)) {
3745 struct f2fs_sb_info *sbi = F2FS_P_SB(page);
3746 struct inode *inode = page->mapping->host;
3747
3748 if (f2fs_compressed_file(inode))
3749 f2fs_invalidate_compress_pages(sbi, inode->i_ino);
3750 if (inode->i_ino == F2FS_COMPRESS_INO(sbi))
3751 clear_page_private_data(page);
3752 }
3753
3754 clear_page_private_gcing(page);
3755
3756 detach_page_private(page);
3757 set_page_private(page, 0);
3758 return 1;
3759}
3760
3761static int f2fs_set_data_page_dirty(struct page *page)
3762{
3763 struct inode *inode = page_file_mapping(page)->host;
3764
3765 trace_f2fs_set_page_dirty(page, DATA);
3766
3767 if (!PageUptodate(page))
3768 SetPageUptodate(page);
3769 if (PageSwapCache(page))
3770 return __set_page_dirty_nobuffers(page);
3771
3772 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
3773 if (!page_private_atomic(page)) {
3774 f2fs_register_inmem_page(inode, page);
3775 return 1;
3776 }
3777
3778
3779
3780
3781 return 0;
3782 }
3783
3784 if (!PageDirty(page)) {
3785 __set_page_dirty_nobuffers(page);
3786 f2fs_update_dirty_page(inode, page);
3787 return 1;
3788 }
3789 return 0;
3790}
3791
3792
3793static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block)
3794{
3795#ifdef CONFIG_F2FS_FS_COMPRESSION
3796 struct dnode_of_data dn;
3797 sector_t start_idx, blknr = 0;
3798 int ret;
3799
3800 start_idx = round_down(block, F2FS_I(inode)->i_cluster_size);
3801
3802 set_new_dnode(&dn, inode, NULL, NULL, 0);
3803 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
3804 if (ret)
3805 return 0;
3806
3807 if (dn.data_blkaddr != COMPRESS_ADDR) {
3808 dn.ofs_in_node += block - start_idx;
3809 blknr = f2fs_data_blkaddr(&dn);
3810 if (!__is_valid_data_blkaddr(blknr))
3811 blknr = 0;
3812 }
3813
3814 f2fs_put_dnode(&dn);
3815 return blknr;
3816#else
3817 return 0;
3818#endif
3819}
3820
3821
3822static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3823{
3824 struct inode *inode = mapping->host;
3825 sector_t blknr = 0;
3826
3827 if (f2fs_has_inline_data(inode))
3828 goto out;
3829
3830
3831 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3832 filemap_write_and_wait(mapping);
3833
3834
3835 if (unlikely(block >= max_file_blocks(inode)))
3836 goto out;
3837
3838 if (f2fs_compressed_file(inode)) {
3839 blknr = f2fs_bmap_compress(inode, block);
3840 } else {
3841 struct f2fs_map_blocks map;
3842
3843 memset(&map, 0, sizeof(map));
3844 map.m_lblk = block;
3845 map.m_len = 1;
3846 map.m_next_pgofs = NULL;
3847 map.m_seg_type = NO_CHECK_TYPE;
3848
3849 if (!f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_BMAP))
3850 blknr = map.m_pblk;
3851 }
3852out:
3853 trace_f2fs_bmap(inode, block, blknr);
3854 return blknr;
3855}
3856
3857#ifdef CONFIG_MIGRATION
3858#include <linux/migrate.h>
3859
3860int f2fs_migrate_page(struct address_space *mapping,
3861 struct page *newpage, struct page *page, enum migrate_mode mode)
3862{
3863 int rc, extra_count;
3864 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3865 bool atomic_written = page_private_atomic(page);
3866
3867 BUG_ON(PageWriteback(page));
3868
3869
3870 if (atomic_written) {
3871 if (mode != MIGRATE_SYNC)
3872 return -EBUSY;
3873 if (!mutex_trylock(&fi->inmem_lock))
3874 return -EAGAIN;
3875 }
3876
3877
3878 extra_count = atomic_written ? 1 : 0;
3879 rc = migrate_page_move_mapping(mapping, newpage,
3880 page, extra_count);
3881 if (rc != MIGRATEPAGE_SUCCESS) {
3882 if (atomic_written)
3883 mutex_unlock(&fi->inmem_lock);
3884 return rc;
3885 }
3886
3887 if (atomic_written) {
3888 struct inmem_pages *cur;
3889
3890 list_for_each_entry(cur, &fi->inmem_pages, list)
3891 if (cur->page == page) {
3892 cur->page = newpage;
3893 break;
3894 }
3895 mutex_unlock(&fi->inmem_lock);
3896 put_page(page);
3897 get_page(newpage);
3898 }
3899
3900
3901 set_page_private(newpage, 0);
3902 if (PagePrivate(page)) {
3903 set_page_private(newpage, page_private(page));
3904 SetPagePrivate(newpage);
3905 get_page(newpage);
3906
3907 set_page_private(page, 0);
3908 ClearPagePrivate(page);
3909 put_page(page);
3910 }
3911
3912 if (mode != MIGRATE_SYNC_NO_COPY)
3913 migrate_page_copy(newpage, page);
3914 else
3915 migrate_page_states(newpage, page);
3916
3917 return MIGRATEPAGE_SUCCESS;
3918}
3919#endif
3920
3921#ifdef CONFIG_SWAP
3922static int f2fs_migrate_blocks(struct inode *inode, block_t start_blk,
3923 unsigned int blkcnt)
3924{
3925 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3926 unsigned int blkofs;
3927 unsigned int blk_per_sec = BLKS_PER_SEC(sbi);
3928 unsigned int secidx = start_blk / blk_per_sec;
3929 unsigned int end_sec = secidx + blkcnt / blk_per_sec;
3930 int ret = 0;
3931
3932 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3933 filemap_invalidate_lock(inode->i_mapping);
3934
3935 set_inode_flag(inode, FI_ALIGNED_WRITE);
3936
3937 for (; secidx < end_sec; secidx++) {
3938 down_write(&sbi->pin_sem);
3939
3940 f2fs_lock_op(sbi);
3941 f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false);
3942 f2fs_unlock_op(sbi);
3943
3944 set_inode_flag(inode, FI_DO_DEFRAG);
3945
3946 for (blkofs = 0; blkofs < blk_per_sec; blkofs++) {
3947 struct page *page;
3948 unsigned int blkidx = secidx * blk_per_sec + blkofs;
3949
3950 page = f2fs_get_lock_data_page(inode, blkidx, true);
3951 if (IS_ERR(page)) {
3952 up_write(&sbi->pin_sem);
3953 ret = PTR_ERR(page);
3954 goto done;
3955 }
3956
3957 set_page_dirty(page);
3958 f2fs_put_page(page, 1);
3959 }
3960
3961 clear_inode_flag(inode, FI_DO_DEFRAG);
3962
3963 ret = filemap_fdatawrite(inode->i_mapping);
3964
3965 up_write(&sbi->pin_sem);
3966
3967 if (ret)
3968 break;
3969 }
3970
3971done:
3972 clear_inode_flag(inode, FI_DO_DEFRAG);
3973 clear_inode_flag(inode, FI_ALIGNED_WRITE);
3974
3975 filemap_invalidate_unlock(inode->i_mapping);
3976 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3977
3978 return ret;
3979}
3980
3981static int check_swap_activate(struct swap_info_struct *sis,
3982 struct file *swap_file, sector_t *span)
3983{
3984 struct address_space *mapping = swap_file->f_mapping;
3985 struct inode *inode = mapping->host;
3986 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3987 sector_t cur_lblock;
3988 sector_t last_lblock;
3989 sector_t pblock;
3990 sector_t lowest_pblock = -1;
3991 sector_t highest_pblock = 0;
3992 int nr_extents = 0;
3993 unsigned long nr_pblocks;
3994 unsigned int blks_per_sec = BLKS_PER_SEC(sbi);
3995 unsigned int sec_blks_mask = BLKS_PER_SEC(sbi) - 1;
3996 unsigned int not_aligned = 0;
3997 int ret = 0;
3998
3999
4000
4001
4002
4003 cur_lblock = 0;
4004 last_lblock = bytes_to_blks(inode, i_size_read(inode));
4005
4006 while (cur_lblock < last_lblock && cur_lblock < sis->max) {
4007 struct f2fs_map_blocks map;
4008retry:
4009 cond_resched();
4010
4011 memset(&map, 0, sizeof(map));
4012 map.m_lblk = cur_lblock;
4013 map.m_len = last_lblock - cur_lblock;
4014 map.m_next_pgofs = NULL;
4015 map.m_next_extent = NULL;
4016 map.m_seg_type = NO_CHECK_TYPE;
4017 map.m_may_create = false;
4018
4019 ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
4020 if (ret)
4021 goto out;
4022
4023
4024 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
4025 f2fs_err(sbi, "Swapfile has holes");
4026 ret = -EINVAL;
4027 goto out;
4028 }
4029
4030 pblock = map.m_pblk;
4031 nr_pblocks = map.m_len;
4032
4033 if ((pblock - SM_I(sbi)->main_blkaddr) & sec_blks_mask ||
4034 nr_pblocks & sec_blks_mask) {
4035 not_aligned++;
4036
4037 nr_pblocks = roundup(nr_pblocks, blks_per_sec);
4038 if (cur_lblock + nr_pblocks > sis->max)
4039 nr_pblocks -= blks_per_sec;
4040
4041 if (!nr_pblocks) {
4042
4043 nr_pblocks = map.m_len;
4044 f2fs_warn(sbi, "Swapfile: last extent is not aligned to section");
4045 goto next;
4046 }
4047
4048 ret = f2fs_migrate_blocks(inode, cur_lblock,
4049 nr_pblocks);
4050 if (ret)
4051 goto out;
4052 goto retry;
4053 }
4054next:
4055 if (cur_lblock + nr_pblocks >= sis->max)
4056 nr_pblocks = sis->max - cur_lblock;
4057
4058 if (cur_lblock) {
4059 if (pblock < lowest_pblock)
4060 lowest_pblock = pblock;
4061 if (pblock + nr_pblocks - 1 > highest_pblock)
4062 highest_pblock = pblock + nr_pblocks - 1;
4063 }
4064
4065
4066
4067
4068 ret = add_swap_extent(sis, cur_lblock, nr_pblocks, pblock);
4069 if (ret < 0)
4070 goto out;
4071 nr_extents += ret;
4072 cur_lblock += nr_pblocks;
4073 }
4074 ret = nr_extents;
4075 *span = 1 + highest_pblock - lowest_pblock;
4076 if (cur_lblock == 0)
4077 cur_lblock = 1;
4078 sis->max = cur_lblock;
4079 sis->pages = cur_lblock - 1;
4080 sis->highest_bit = cur_lblock - 1;
4081out:
4082 if (not_aligned)
4083 f2fs_warn(sbi, "Swapfile (%u) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(%u * N)",
4084 not_aligned, blks_per_sec * F2FS_BLKSIZE);
4085 return ret;
4086}
4087
4088static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
4089 sector_t *span)
4090{
4091 struct inode *inode = file_inode(file);
4092 int ret;
4093
4094 if (!S_ISREG(inode->i_mode))
4095 return -EINVAL;
4096
4097 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
4098 return -EROFS;
4099
4100 if (f2fs_lfs_mode(F2FS_I_SB(inode))) {
4101 f2fs_err(F2FS_I_SB(inode),
4102 "Swapfile not supported in LFS mode");
4103 return -EINVAL;
4104 }
4105
4106 ret = f2fs_convert_inline_inode(inode);
4107 if (ret)
4108 return ret;
4109
4110 if (!f2fs_disable_compressed_file(inode))
4111 return -EINVAL;
4112
4113 f2fs_precache_extents(inode);
4114
4115 ret = check_swap_activate(sis, file, span);
4116 if (ret < 0)
4117 return ret;
4118
4119 set_inode_flag(inode, FI_PIN_FILE);
4120 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
4121 return ret;
4122}
4123
4124static void f2fs_swap_deactivate(struct file *file)
4125{
4126 struct inode *inode = file_inode(file);
4127
4128 clear_inode_flag(inode, FI_PIN_FILE);
4129}
4130#else
4131static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
4132 sector_t *span)
4133{
4134 return -EOPNOTSUPP;
4135}
4136
4137static void f2fs_swap_deactivate(struct file *file)
4138{
4139}
4140#endif
4141
4142const struct address_space_operations f2fs_dblock_aops = {
4143 .readpage = f2fs_read_data_page,
4144 .readahead = f2fs_readahead,
4145 .writepage = f2fs_write_data_page,
4146 .writepages = f2fs_write_data_pages,
4147 .write_begin = f2fs_write_begin,
4148 .write_end = f2fs_write_end,
4149 .set_page_dirty = f2fs_set_data_page_dirty,
4150 .invalidatepage = f2fs_invalidate_page,
4151 .releasepage = f2fs_release_page,
4152 .direct_IO = f2fs_direct_IO,
4153 .bmap = f2fs_bmap,
4154 .swap_activate = f2fs_swap_activate,
4155 .swap_deactivate = f2fs_swap_deactivate,
4156#ifdef CONFIG_MIGRATION
4157 .migratepage = f2fs_migrate_page,
4158#endif
4159};
4160
4161void f2fs_clear_page_cache_dirty_tag(struct page *page)
4162{
4163 struct address_space *mapping = page_mapping(page);
4164 unsigned long flags;
4165
4166 xa_lock_irqsave(&mapping->i_pages, flags);
4167 __xa_clear_mark(&mapping->i_pages, page_index(page),
4168 PAGECACHE_TAG_DIRTY);
4169 xa_unlock_irqrestore(&mapping->i_pages, flags);
4170}
4171
4172int __init f2fs_init_post_read_processing(void)
4173{
4174 bio_post_read_ctx_cache =
4175 kmem_cache_create("f2fs_bio_post_read_ctx",
4176 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
4177 if (!bio_post_read_ctx_cache)
4178 goto fail;
4179 bio_post_read_ctx_pool =
4180 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
4181 bio_post_read_ctx_cache);
4182 if (!bio_post_read_ctx_pool)
4183 goto fail_free_cache;
4184 return 0;
4185
4186fail_free_cache:
4187 kmem_cache_destroy(bio_post_read_ctx_cache);
4188fail:
4189 return -ENOMEM;
4190}
4191
4192void f2fs_destroy_post_read_processing(void)
4193{
4194 mempool_destroy(bio_post_read_ctx_pool);
4195 kmem_cache_destroy(bio_post_read_ctx_cache);
4196}
4197
4198int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
4199{
4200 if (!f2fs_sb_has_encrypt(sbi) &&
4201 !f2fs_sb_has_verity(sbi) &&
4202 !f2fs_sb_has_compression(sbi))
4203 return 0;
4204
4205 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
4206 WQ_UNBOUND | WQ_HIGHPRI,
4207 num_online_cpus());
4208 if (!sbi->post_read_wq)
4209 return -ENOMEM;
4210 return 0;
4211}
4212
4213void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
4214{
4215 if (sbi->post_read_wq)
4216 destroy_workqueue(sbi->post_read_wq);
4217}
4218
4219int __init f2fs_init_bio_entry_cache(void)
4220{
4221 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
4222 sizeof(struct bio_entry));
4223 if (!bio_entry_slab)
4224 return -ENOMEM;
4225 return 0;
4226}
4227
4228void f2fs_destroy_bio_entry_cache(void)
4229{
4230 kmem_cache_destroy(bio_entry_slab);
4231}
4232