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f2fs: support partial truncation on compressed inode
[linux.git] / fs / f2fs / data.c
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7c1a000d 1// SPDX-License-Identifier: GPL-2.0
0a8165d7 2/*
eb47b800
JK		 3 * fs/f2fs/data.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
eb47b800
JK		 7 */
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>
8f46dcae 14#include <linux/pagevec.h>
eb47b800
JK		 15#include <linux/blkdev.h>
16#include <linux/bio.h>
4969c06a 17#include <linux/swap.h>
690e4a3e 18#include <linux/prefetch.h>
e2e40f2c 19#include <linux/uio.h>
f1e88660 20#include <linux/cleancache.h>
174cd4b1 21#include <linux/sched/signal.h>
eb47b800
JK		 22
23#include "f2fs.h"
24#include "node.h"
25#include "segment.h"
db9f7c1a 26#include "trace.h"
848753aa 27#include <trace/events/f2fs.h>
eb47b800 28
6dbb1796
EB		 29#define NUM_PREALLOC_POST_READ_CTXS 128
30
31static struct kmem_cache *bio_post_read_ctx_cache;
0b20fcec 32static struct kmem_cache *bio_entry_slab;
6dbb1796 33static mempool_t *bio_post_read_ctx_pool;
f543805f
CY		 34static struct bio_set f2fs_bioset;
35
36#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
37
38int __init f2fs_init_bioset(void)
39{
40 if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
41 0, BIOSET_NEED_BVECS))
42 return -ENOMEM;
43 return 0;
44}
45
46void f2fs_destroy_bioset(void)
47{
48 bioset_exit(&f2fs_bioset);
49}
50
51static inline struct bio *__f2fs_bio_alloc(gfp_t gfp_mask,
52 unsigned int nr_iovecs)
53{
54 return bio_alloc_bioset(gfp_mask, nr_iovecs, &f2fs_bioset);
55}
56
ca9e968a 57struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi, int npages, bool noio)
f543805f 58{
ca9e968a 59 if (noio) {
f543805f 60 /* No failure on bio allocation */
ca9e968a 61 return __f2fs_bio_alloc(GFP_NOIO, npages);
f543805f 62 }
ca9e968a 63
f543805f
CY		 64 if (time_to_inject(sbi, FAULT_ALLOC_BIO)) {
65 f2fs_show_injection_info(sbi, FAULT_ALLOC_BIO);
66 return NULL;
67 }
68
69 return __f2fs_bio_alloc(GFP_KERNEL, npages);
70}
6dbb1796 71
36951b38
CY		 72static bool __is_cp_guaranteed(struct page *page)
73{
74 struct address_space *mapping = page->mapping;
75 struct inode *inode;
76 struct f2fs_sb_info *sbi;
77
78 if (!mapping)
79 return false;
80
4c8ff709
CY		 81 if (f2fs_is_compressed_page(page))
82 return false;
83
36951b38
CY		 84 inode = mapping->host;
85 sbi = F2FS_I_SB(inode);
86
87 if (inode->i_ino == F2FS_META_INO(sbi) ||
88 inode->i_ino == F2FS_NODE_INO(sbi) ||
89 S_ISDIR(inode->i_mode) ||
e7a4feb0 90 (S_ISREG(inode->i_mode) &&
af033b2a 91 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
36951b38
CY		 92 is_cold_data(page))
93 return true;
94 return false;
95}
96
5f9abab4
JK		 97static enum count_type __read_io_type(struct page *page)
98{
4969c06a 99 struct address_space *mapping = page_file_mapping(page);
5f9abab4
JK		 100
101 if (mapping) {
102 struct inode *inode = mapping->host;
103 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
104
105 if (inode->i_ino == F2FS_META_INO(sbi))
106 return F2FS_RD_META;
107
108 if (inode->i_ino == F2FS_NODE_INO(sbi))
109 return F2FS_RD_NODE;
110 }
111 return F2FS_RD_DATA;
112}
113
6dbb1796
EB		 114/* postprocessing steps for read bios */
115enum bio_post_read_step {
6dbb1796 116 STEP_DECRYPT,
4c8ff709 117 STEP_DECOMPRESS,
95ae251f 118 STEP_VERITY,
6dbb1796
EB		 119};
120
121struct bio_post_read_ctx {
122 struct bio *bio;
4c8ff709 123 struct f2fs_sb_info *sbi;
6dbb1796 124 struct work_struct work;
6dbb1796
EB		 125 unsigned int enabled_steps;
126};
127
4c8ff709 128static void __read_end_io(struct bio *bio, bool compr, bool verity)
93dfe2ac 129{
6dbb1796
EB		 130 struct page *page;
131 struct bio_vec *bv;
6dc4f100 132 struct bvec_iter_all iter_all;
93dfe2ac 133
2b070cfe 134 bio_for_each_segment_all(bv, bio, iter_all) {
6dbb1796
EB		 135 page = bv->bv_page;
136
4c8ff709
CY		 137#ifdef CONFIG_F2FS_FS_COMPRESSION
138 if (compr && f2fs_is_compressed_page(page)) {
139 f2fs_decompress_pages(bio, page, verity);
140 continue;
141 }
74878565
CY		 142 if (verity)
143 continue;
4c8ff709
CY		 144#endif
145
6dbb1796
EB		 146 /* PG_error was set if any post_read step failed */
147 if (bio->bi_status || PageError(page)) {
148 ClearPageUptodate(page);
fb7d70db
JK		 149 /* will re-read again later */
150 ClearPageError(page);
6dbb1796
EB		 151 } else {
152 SetPageUptodate(page);
153 }
5f9abab4 154 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
6dbb1796
EB		 155 unlock_page(page);
156 }
4c8ff709
CY		 157}
158
159static void f2fs_release_read_bio(struct bio *bio);
160static void __f2fs_read_end_io(struct bio *bio, bool compr, bool verity)
161{
162 if (!compr)
163 __read_end_io(bio, false, verity);
164 f2fs_release_read_bio(bio);
165}
166
167static void f2fs_decompress_bio(struct bio *bio, bool verity)
168{
169 __read_end_io(bio, true, verity);
6dbb1796
EB		 170}
171
172static void bio_post_read_processing(struct bio_post_read_ctx *ctx);
173
4c8ff709
CY		 174static void f2fs_decrypt_work(struct bio_post_read_ctx *ctx)
175{
176 fscrypt_decrypt_bio(ctx->bio);
177}
178
179static void f2fs_decompress_work(struct bio_post_read_ctx *ctx)
180{
181 f2fs_decompress_bio(ctx->bio, ctx->enabled_steps & (1 << STEP_VERITY));
182}
183
184#ifdef CONFIG_F2FS_FS_COMPRESSION
185static void f2fs_verify_pages(struct page **rpages, unsigned int cluster_size)
186{
187 f2fs_decompress_end_io(rpages, cluster_size, false, true);
188}
189
190static void f2fs_verify_bio(struct bio *bio)
191{
79bbefb1
CY		 192 struct bio_vec *bv;
193 struct bvec_iter_all iter_all;
194
195 bio_for_each_segment_all(bv, bio, iter_all) {
196 struct page *page = bv->bv_page;
197 struct decompress_io_ctx *dic;
4c8ff709 198
79bbefb1
CY		 199 dic = (struct decompress_io_ctx *)page_private(page);
200
201 if (dic) {
202 if (refcount_dec_not_one(&dic->ref))
203 continue;
204 f2fs_verify_pages(dic->rpages,
205 dic->cluster_size);
206 f2fs_free_dic(dic);
207 continue;
208 }
209
210 if (bio->bi_status || PageError(page))
211 goto clear_uptodate;
212
213 if (fsverity_verify_page(page)) {
214 SetPageUptodate(page);
215 goto unlock;
216 }
217clear_uptodate:
218 ClearPageUptodate(page);
219 ClearPageError(page);
220unlock:
74878565 221 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
79bbefb1
CY		 222 unlock_page(page);
223 }
4c8ff709
CY		 224}
225#endif
226
227static void f2fs_verity_work(struct work_struct *work)
6dbb1796
EB		 228{
229 struct bio_post_read_ctx *ctx =
230 container_of(work, struct bio_post_read_ctx, work);
644c8c92
EB		 231 struct bio *bio = ctx->bio;
232#ifdef CONFIG_F2FS_FS_COMPRESSION
233 unsigned int enabled_steps = ctx->enabled_steps;
234#endif
235
236 /*
237 * fsverity_verify_bio() may call readpages() again, and while verity
238 * will be disabled for this, decryption may still be needed, resulting
239 * in another bio_post_read_ctx being allocated. So to prevent
240 * deadlocks we need to release the current ctx to the mempool first.
241 * This assumes that verity is the last post-read step.
242 */
243 mempool_free(ctx, bio_post_read_ctx_pool);
244 bio->bi_private = NULL;
6dbb1796 245
4c8ff709
CY		 246#ifdef CONFIG_F2FS_FS_COMPRESSION
247 /* previous step is decompression */
644c8c92
EB		 248 if (enabled_steps & (1 << STEP_DECOMPRESS)) {
249 f2fs_verify_bio(bio);
250 f2fs_release_read_bio(bio);
4c8ff709
CY		 251 return;
252 }
253#endif
6dbb1796 254
644c8c92
EB		 255 fsverity_verify_bio(bio);
256 __f2fs_read_end_io(bio, false, false);
6dbb1796
EB		 257}
258
4c8ff709 259static void f2fs_post_read_work(struct work_struct *work)
95ae251f
EB		 260{
261 struct bio_post_read_ctx *ctx =
262 container_of(work, struct bio_post_read_ctx, work);
263
4c8ff709
CY		 264 if (ctx->enabled_steps & (1 << STEP_DECRYPT))
265 f2fs_decrypt_work(ctx);
266
267 if (ctx->enabled_steps & (1 << STEP_DECOMPRESS))
268 f2fs_decompress_work(ctx);
269
270 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
271 INIT_WORK(&ctx->work, f2fs_verity_work);
272 fsverity_enqueue_verify_work(&ctx->work);
273 return;
274 }
275
276 __f2fs_read_end_io(ctx->bio,
277 ctx->enabled_steps & (1 << STEP_DECOMPRESS), false);
278}
95ae251f 279
4c8ff709
CY		 280static void f2fs_enqueue_post_read_work(struct f2fs_sb_info *sbi,
281 struct work_struct *work)
282{
283 queue_work(sbi->post_read_wq, work);
95ae251f
EB		 284}
285
6dbb1796
EB		 286static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
287{
95ae251f
EB		 288 /*
289 * We use different work queues for decryption and for verity because
290 * verity may require reading metadata pages that need decryption, and
291 * we shouldn't recurse to the same workqueue.
292 */
4c8ff709
CY		 293
294 if (ctx->enabled_steps & (1 << STEP_DECRYPT) ||
295 ctx->enabled_steps & (1 << STEP_DECOMPRESS)) {
296 INIT_WORK(&ctx->work, f2fs_post_read_work);
297 f2fs_enqueue_post_read_work(ctx->sbi, &ctx->work);
298 return;
299 }
300
301 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
302 INIT_WORK(&ctx->work, f2fs_verity_work);
303 fsverity_enqueue_verify_work(&ctx->work);
304 return;
6dbb1796 305 }
4c8ff709
CY		 306
307 __f2fs_read_end_io(ctx->bio, false, false);
6dbb1796
EB		 308}
309
310static bool f2fs_bio_post_read_required(struct bio *bio)
311{
4c8ff709 312 return bio->bi_private;
6dbb1796
EB		 313}
314
315static void f2fs_read_end_io(struct bio *bio)
316{
c45d6002
CY		 317 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
318
319 if (time_to_inject(sbi, FAULT_READ_IO)) {
320 f2fs_show_injection_info(sbi, FAULT_READ_IO);
4e4cbee9 321 bio->bi_status = BLK_STS_IOERR;
55523519 322 }
8b038c70 323
6dbb1796
EB		 324 if (f2fs_bio_post_read_required(bio)) {
325 struct bio_post_read_ctx *ctx = bio->bi_private;
f1e88660 326
6dbb1796
EB		 327 bio_post_read_processing(ctx);
328 return;
f1e88660 329 }
6dbb1796 330
4c8ff709 331 __f2fs_read_end_io(bio, false, false);
f1e88660
JK		 332}
333
4246a0b6 334static void f2fs_write_end_io(struct bio *bio)
93dfe2ac 335{
1b1f559f 336 struct f2fs_sb_info *sbi = bio->bi_private;
f568849e 337 struct bio_vec *bvec;
6dc4f100 338 struct bvec_iter_all iter_all;
93dfe2ac 339
6f5c2ed0 340 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
c45d6002 341 f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
6f5c2ed0
CY		 342 bio->bi_status = BLK_STS_IOERR;
343 }
344
2b070cfe 345 bio_for_each_segment_all(bvec, bio, iter_all) {
93dfe2ac 346 struct page *page = bvec->bv_page;
36951b38 347 enum count_type type = WB_DATA_TYPE(page);
93dfe2ac 348
0a595eba
JK		 349 if (IS_DUMMY_WRITTEN_PAGE(page)) {
350 set_page_private(page, (unsigned long)NULL);
351 ClearPagePrivate(page);
352 unlock_page(page);
353 mempool_free(page, sbi->write_io_dummy);
354
4e4cbee9 355 if (unlikely(bio->bi_status))
0a595eba
JK		 356 f2fs_stop_checkpoint(sbi, true);
357 continue;
358 }
359
d2d0727b 360 fscrypt_finalize_bounce_page(&page);
4375a336 361
4c8ff709
CY		 362#ifdef CONFIG_F2FS_FS_COMPRESSION
363 if (f2fs_is_compressed_page(page)) {
364 f2fs_compress_write_end_io(bio, page);
365 continue;
366 }
367#endif
368
4e4cbee9 369 if (unlikely(bio->bi_status)) {
5114a97a 370 mapping_set_error(page->mapping, -EIO);
b1ca321d
JK		 371 if (type == F2FS_WB_CP_DATA)
372 f2fs_stop_checkpoint(sbi, true);
93dfe2ac 373 }
7dff55d2
YH		 374
375 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
376 page->index != nid_of_node(page));
377
36951b38 378 dec_page_count(sbi, type);
50fa53ec
CY		 379 if (f2fs_in_warm_node_list(sbi, page))
380 f2fs_del_fsync_node_entry(sbi, page);
36951b38 381 clear_cold_data(page);
93dfe2ac 382 end_page_writeback(page);
f568849e 383 }
36951b38 384 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
f5730184 385 wq_has_sleeper(&sbi->cp_wait))
93dfe2ac
JK		 386 wake_up(&sbi->cp_wait);
387
388 bio_put(bio);
389}
390
3c62be17
JK		 391struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
392 block_t blk_addr, struct bio *bio)
393{
394 struct block_device *bdev = sbi->sb->s_bdev;
395 int i;
396
0916878d
DLM		 397 if (f2fs_is_multi_device(sbi)) {
398 for (i = 0; i < sbi->s_ndevs; i++) {
399 if (FDEV(i).start_blk <= blk_addr &&
400 FDEV(i).end_blk >= blk_addr) {
401 blk_addr -= FDEV(i).start_blk;
402 bdev = FDEV(i).bdev;
403 break;
404 }
3c62be17
JK		 405 }
406 }
407 if (bio) {
74d46992 408 bio_set_dev(bio, bdev);
3c62be17
JK		 409 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
410 }
411 return bdev;
412}
413
414int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
415{
416 int i;
417
0916878d
DLM		 418 if (!f2fs_is_multi_device(sbi))
419 return 0;
420
3c62be17
JK		 421 for (i = 0; i < sbi->s_ndevs; i++)
422 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
423 return i;
424 return 0;
425}
426
7a88ddb5
CY		 427/*
428 * Return true, if pre_bio's bdev is same as its target device.
429 */
3c62be17
JK		 430static bool __same_bdev(struct f2fs_sb_info *sbi,
431 block_t blk_addr, struct bio *bio)
432{
74d46992
CH		 433 struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
434 return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
3c62be17
JK		 435}
436
b757f6ed 437static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
940a6d34 438{
b757f6ed 439 struct f2fs_sb_info *sbi = fio->sbi;
940a6d34
GZ		 440 struct bio *bio;
441
d62fe971 442 bio = f2fs_bio_alloc(sbi, npages, true);
940a6d34 443
b757f6ed
CY		 444 f2fs_target_device(sbi, fio->new_blkaddr, bio);
445 if (is_read_io(fio->op)) {
0cdd3195
HL		 446 bio->bi_end_io = f2fs_read_end_io;
447 bio->bi_private = NULL;
448 } else {
449 bio->bi_end_io = f2fs_write_end_io;
450 bio->bi_private = sbi;
b757f6ed
CY		 451 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
452 fio->type, fio->temp);
0cdd3195 453 }
b757f6ed
CY		 454 if (fio->io_wbc)
455 wbc_init_bio(fio->io_wbc, bio);
940a6d34
GZ		 456
457 return bio;
458}
459
4fc29c1a
LT		 460static inline void __submit_bio(struct f2fs_sb_info *sbi,
461 struct bio *bio, enum page_type type)
f5730184 462{
4fc29c1a 463 if (!is_read_io(bio_op(bio))) {
0a595eba
JK		 464 unsigned int start;
465
0a595eba
JK		 466 if (type != DATA && type != NODE)
467 goto submit_io;
468
b0332a0f 469 if (f2fs_lfs_mode(sbi) && current->plug)
3bb09a0e
TY		 470 blk_finish_plug(current->plug);
471
8223ecc4
CY		 472 if (F2FS_IO_ALIGNED(sbi))
473 goto submit_io;
474
0a595eba
JK		 475 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
476 start %= F2FS_IO_SIZE(sbi);
477
478 if (start == 0)
479 goto submit_io;
480
481 /* fill dummy pages */
482 for (; start < F2FS_IO_SIZE(sbi); start++) {
483 struct page *page =
484 mempool_alloc(sbi->write_io_dummy,
bc73a4b2 485 GFP_NOIO | __GFP_NOFAIL);
0a595eba
JK		 486 f2fs_bug_on(sbi, !page);
487
bc73a4b2 488 zero_user_segment(page, 0, PAGE_SIZE);
0a595eba
JK		 489 SetPagePrivate(page);
490 set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
491 lock_page(page);
492 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
493 f2fs_bug_on(sbi, 1);
494 }
495 /*
496 * In the NODE case, we lose next block address chain. So, we
497 * need to do checkpoint in f2fs_sync_file.
498 */
499 if (type == NODE)
500 set_sbi_flag(sbi, SBI_NEED_CP);
19a5f5e2 501 }
0a595eba 502submit_io:
554b5125
JK		 503 if (is_read_io(bio_op(bio)))
504 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
505 else
506 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
4e49ea4a 507 submit_bio(bio);
f5730184
JK		 508}
509
4c8ff709
CY		 510void f2fs_submit_bio(struct f2fs_sb_info *sbi,
511 struct bio *bio, enum page_type type)
512{
513 __submit_bio(sbi, bio, type);
514}
515
da9953b7
JK		 516static void __attach_data_io_flag(struct f2fs_io_info *fio)
517{
518 struct f2fs_sb_info *sbi = fio->sbi;
519 unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
520 unsigned int fua_flag = sbi->data_io_flag & temp_mask;
521 unsigned int meta_flag = (sbi->data_io_flag >> NR_TEMP_TYPE) &
522 temp_mask;
523 /*
524 * data io flag bits per temp:
525 * REQ_META | REQ_FUA |
526 * 5 | 4 | 3 | 2 | 1 | 0 |
527 * Cold | Warm | Hot | Cold | Warm | Hot |
528 */
529 if (fio->type != DATA)
530 return;
531
532 if ((1 << fio->temp) & meta_flag)
533 fio->op_flags |= REQ_META;
534 if ((1 << fio->temp) & fua_flag)
535 fio->op_flags |= REQ_FUA;
536}
537
458e6197 538static void __submit_merged_bio(struct f2fs_bio_info *io)
93dfe2ac 539{
458e6197 540 struct f2fs_io_info *fio = &io->fio;
93dfe2ac
JK		 541
542 if (!io->bio)
543 return;
544
da9953b7 545 __attach_data_io_flag(fio);
554b5125
JK		 546 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
547
04d328de 548 if (is_read_io(fio->op))
554b5125 549 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
6a8f8ca5 550 else
554b5125 551 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
04d328de 552
4fc29c1a 553 __submit_bio(io->sbi, io->bio, fio->type);
93dfe2ac
JK		 554 io->bio = NULL;
555}
556
8648de2c 557static bool __has_merged_page(struct bio *bio, struct inode *inode,
bab475c5 558 struct page *page, nid_t ino)
0fd785eb 559{
0fd785eb 560 struct bio_vec *bvec;
6dc4f100 561 struct bvec_iter_all iter_all;
0fd785eb 562
8648de2c 563 if (!bio)
0fd785eb 564 return false;
0c3a5797 565
bab475c5 566 if (!inode && !page && !ino)
0c3a5797 567 return true;
0fd785eb 568
8648de2c 569 bio_for_each_segment_all(bvec, bio, iter_all) {
4c8ff709 570 struct page *target = bvec->bv_page;
0fd785eb 571
4c8ff709 572 if (fscrypt_is_bounce_page(target)) {
d2d0727b 573 target = fscrypt_pagecache_page(target);
4c8ff709
CY		 574 if (IS_ERR(target))
575 continue;
576 }
577 if (f2fs_is_compressed_page(target)) {
578 target = f2fs_compress_control_page(target);
579 if (IS_ERR(target))
580 continue;
581 }
0fd785eb 582
0c3a5797
CY		 583 if (inode && inode == target->mapping->host)
584 return true;
bab475c5
CY		 585 if (page && page == target)
586 return true;
0c3a5797 587 if (ino && ino == ino_of_node(target))
0fd785eb 588 return true;
0fd785eb
CY		 589 }
590
0fd785eb
CY		 591 return false;
592}
593
b9109b0e 594static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
a912b54d 595 enum page_type type, enum temp_type temp)
93dfe2ac
JK		 596{
597 enum page_type btype = PAGE_TYPE_OF_BIO(type);
a912b54d 598 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
93dfe2ac 599
df0f8dc0 600 down_write(&io->io_rwsem);
458e6197
JK		 601
602 /* change META to META_FLUSH in the checkpoint procedure */
603 if (type >= META_FLUSH) {
604 io->fio.type = META_FLUSH;
04d328de 605 io->fio.op = REQ_OP_WRITE;
3adc5fcb 606 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
70fd7614 607 if (!test_opt(sbi, NOBARRIER))
7f54f51f 608 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
458e6197
JK		 609 }
610 __submit_merged_bio(io);
df0f8dc0 611 up_write(&io->io_rwsem);
93dfe2ac
JK		 612}
613
a912b54d 614static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 615 struct inode *inode, struct page *page,
616 nid_t ino, enum page_type type, bool force)
0c3a5797 617{
a912b54d 618 enum temp_type temp;
1e771e83 619 bool ret = true;
a912b54d
JK		 620
621 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
1e771e83
YS		 622 if (!force) {
623 enum page_type btype = PAGE_TYPE_OF_BIO(type);
624 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
a912b54d 625
1e771e83 626 down_read(&io->io_rwsem);
8648de2c 627 ret = __has_merged_page(io->bio, inode, page, ino);
1e771e83
YS		 628 up_read(&io->io_rwsem);
629 }
630 if (ret)
631 __f2fs_submit_merged_write(sbi, type, temp);
a912b54d
JK		 632
633 /* TODO: use HOT temp only for meta pages now. */
634 if (type >= META)
635 break;
636 }
0c3a5797
CY		 637}
638
b9109b0e 639void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
0c3a5797 640{
adcc00f7 641 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
0c3a5797
CY		 642}
643
b9109b0e 644void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 645 struct inode *inode, struct page *page,
646 nid_t ino, enum page_type type)
0c3a5797 647{
bab475c5 648 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
0c3a5797
CY		 649}
650
b9109b0e 651void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
406657dd 652{
b9109b0e
JK		 653 f2fs_submit_merged_write(sbi, DATA);
654 f2fs_submit_merged_write(sbi, NODE);
655 f2fs_submit_merged_write(sbi, META);
406657dd
CY		 656}
657
93dfe2ac
JK		 658/*
659 * Fill the locked page with data located in the block address.
771a9a71 660 * A caller needs to unlock the page on failure.
93dfe2ac 661 */
05ca3632 662int f2fs_submit_page_bio(struct f2fs_io_info *fio)
93dfe2ac 663{
93dfe2ac 664 struct bio *bio;
0b81d077
JK		 665 struct page *page = fio->encrypted_page ?
666 fio->encrypted_page : fio->page;
93dfe2ac 667
c9b60788 668 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
93770ab7
CY		 669 fio->is_por ? META_POR : (__is_meta_io(fio) ?
670 META_GENERIC : DATA_GENERIC_ENHANCE)))
10f966bb 671 return -EFSCORRUPTED;
c9b60788 672
2ace38e0 673 trace_f2fs_submit_page_bio(page, fio);
05ca3632 674 f2fs_trace_ios(fio, 0);
93dfe2ac
JK		 675
676 /* Allocate a new bio */
b757f6ed 677 bio = __bio_alloc(fio, 1);
93dfe2ac 678
09cbfeaf 679 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
93dfe2ac 680 bio_put(bio);
93dfe2ac
JK		 681 return -EFAULT;
682 }
78efac53
CY		 683
684 if (fio->io_wbc && !is_read_io(fio->op))
34e51a5e 685 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
78efac53 686
04d328de 687 bio_set_op_attrs(bio, fio->op, fio->op_flags);
93dfe2ac 688
5f9abab4
JK		 689 inc_page_count(fio->sbi, is_read_io(fio->op) ?
690 __read_io_type(page): WB_DATA_TYPE(fio->page));
4c58ed07
CY		 691
692 __submit_bio(fio->sbi, bio, fio->type);
93dfe2ac
JK		 693 return 0;
694}
695
8896cbdf
CY		 696static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
697 block_t last_blkaddr, block_t cur_blkaddr)
698{
699 if (last_blkaddr + 1 != cur_blkaddr)
700 return false;
701 return __same_bdev(sbi, cur_blkaddr, bio);
702}
703
704static bool io_type_is_mergeable(struct f2fs_bio_info *io,
705 struct f2fs_io_info *fio)
706{
707 if (io->fio.op != fio->op)
708 return false;
709 return io->fio.op_flags == fio->op_flags;
710}
711
712static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
713 struct f2fs_bio_info *io,
714 struct f2fs_io_info *fio,
715 block_t last_blkaddr,
716 block_t cur_blkaddr)
717{
c72db71e
CY		 718 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
719 unsigned int filled_blocks =
720 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
721 unsigned int io_size = F2FS_IO_SIZE(sbi);
722 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
723
724 /* IOs in bio is aligned and left space of vectors is not enough */
725 if (!(filled_blocks % io_size) && left_vecs < io_size)
726 return false;
727 }
8896cbdf
CY		 728 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
729 return false;
730 return io_type_is_mergeable(io, fio);
731}
732
0b20fcec
CY		 733static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
734 struct page *page, enum temp_type temp)
735{
736 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
737 struct bio_entry *be;
738
739 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
740 be->bio = bio;
741 bio_get(bio);
742
743 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
744 f2fs_bug_on(sbi, 1);
745
746 down_write(&io->bio_list_lock);
747 list_add_tail(&be->list, &io->bio_list);
748 up_write(&io->bio_list_lock);
749}
750
751static void del_bio_entry(struct bio_entry *be)
752{
753 list_del(&be->list);
754 kmem_cache_free(bio_entry_slab, be);
755}
756
757static int add_ipu_page(struct f2fs_sb_info *sbi, struct bio **bio,
758 struct page *page)
759{
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
4c8ff709
CY		 776 if (bio_add_page(*bio, page, PAGE_SIZE, 0) ==
777 PAGE_SIZE) {
0b20fcec
CY		 778 ret = 0;
779 break;
780 }
781
782 /* bio is full */
783 del_bio_entry(be);
784 __submit_bio(sbi, *bio, DATA);
785 break;
786 }
787 up_write(&io->bio_list_lock);
788 }
789
790 if (ret) {
791 bio_put(*bio);
792 *bio = NULL;
793 }
794
795 return ret;
796}
797
798void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
799 struct bio **bio, struct page *page)
800{
801 enum temp_type temp;
802 bool found = false;
803 struct bio *target = bio ? *bio : NULL;
804
805 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
806 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
807 struct list_head *head = &io->bio_list;
808 struct bio_entry *be;
809
810 if (list_empty(head))
811 continue;
812
813 down_read(&io->bio_list_lock);
814 list_for_each_entry(be, head, list) {
815 if (target)
816 found = (target == be->bio);
817 else
818 found = __has_merged_page(be->bio, NULL,
819 page, 0);
820 if (found)
821 break;
822 }
823 up_read(&io->bio_list_lock);
824
825 if (!found)
826 continue;
827
828 found = false;
829
830 down_write(&io->bio_list_lock);
831 list_for_each_entry(be, head, list) {
832 if (target)
833 found = (target == be->bio);
834 else
835 found = __has_merged_page(be->bio, NULL,
836 page, 0);
837 if (found) {
838 target = be->bio;
839 del_bio_entry(be);
840 break;
841 }
842 }
843 up_write(&io->bio_list_lock);
844 }
845
846 if (found)
847 __submit_bio(sbi, target, DATA);
848 if (bio && *bio) {
849 bio_put(*bio);
850 *bio = NULL;
851 }
852}
853
8648de2c
CY		 854int f2fs_merge_page_bio(struct f2fs_io_info *fio)
855{
856 struct bio *bio = *fio->bio;
857 struct page *page = fio->encrypted_page ?
858 fio->encrypted_page : fio->page;
859
860 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
861 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
10f966bb 862 return -EFSCORRUPTED;
8648de2c
CY		 863
864 trace_f2fs_submit_page_bio(page, fio);
865 f2fs_trace_ios(fio, 0);
866
8896cbdf 867 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
0b20fcec
CY		 868 fio->new_blkaddr))
869 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
8648de2c
CY		 870alloc_new:
871 if (!bio) {
b757f6ed 872 bio = __bio_alloc(fio, BIO_MAX_PAGES);
8648de2c 873 bio_set_op_attrs(bio, fio->op, fio->op_flags);
8648de2c 874
0b20fcec
CY		 875 add_bio_entry(fio->sbi, bio, page, fio->temp);
876 } else {
877 if (add_ipu_page(fio->sbi, &bio, page))
878 goto alloc_new;
8648de2c
CY		 879 }
880
881 if (fio->io_wbc)
9637d517 882 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
8648de2c
CY		 883
884 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
885
886 *fio->last_block = fio->new_blkaddr;
887 *fio->bio = bio;
888
889 return 0;
890}
891
fe16efe6 892void f2fs_submit_page_write(struct f2fs_io_info *fio)
93dfe2ac 893{
05ca3632 894 struct f2fs_sb_info *sbi = fio->sbi;
458e6197 895 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
a912b54d 896 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
4375a336 897 struct page *bio_page;
93dfe2ac 898
b9109b0e 899 f2fs_bug_on(sbi, is_read_io(fio->op));
93dfe2ac 900
fb830fc5
CY		 901 down_write(&io->io_rwsem);
902next:
903 if (fio->in_list) {
904 spin_lock(&io->io_lock);
905 if (list_empty(&io->io_list)) {
906 spin_unlock(&io->io_lock);
fe16efe6 907 goto out;
fb830fc5
CY		 908 }
909 fio = list_first_entry(&io->io_list,
910 struct f2fs_io_info, list);
911 list_del(&fio->list);
912 spin_unlock(&io->io_lock);
913 }
93dfe2ac 914
93770ab7 915 verify_fio_blkaddr(fio);
93dfe2ac 916
4c8ff709
CY		 917 if (fio->encrypted_page)
918 bio_page = fio->encrypted_page;
919 else if (fio->compressed_page)
920 bio_page = fio->compressed_page;
921 else
922 bio_page = fio->page;
36951b38 923
ebf7c522
TM		 924 /* set submitted = true as a return value */
925 fio->submitted = true;
d68f735b 926
b9109b0e 927 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
93dfe2ac 928
8896cbdf
CY		 929 if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio,
930 io->last_block_in_bio, fio->new_blkaddr))
458e6197 931 __submit_merged_bio(io);
93dfe2ac
JK		 932alloc_new:
933 if (io->bio == NULL) {
8223ecc4
CY		 934 if (F2FS_IO_ALIGNED(sbi) &&
935 (fio->type == DATA || fio->type == NODE) &&
0a595eba 936 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
b9109b0e 937 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
fe16efe6
CY		 938 fio->retry = true;
939 goto skip;
0a595eba 940 }
b757f6ed 941 io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
458e6197 942 io->fio = *fio;
93dfe2ac
JK		 943 }
944
a912b54d 945 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
458e6197 946 __submit_merged_bio(io);
93dfe2ac
JK		 947 goto alloc_new;
948 }
949
578c6478 950 if (fio->io_wbc)
34e51a5e 951 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
578c6478 952
7a9d7548 953 io->last_block_in_bio = fio->new_blkaddr;
05ca3632 954 f2fs_trace_ios(fio, 0);
fb830fc5
CY		 955
956 trace_f2fs_submit_page_write(fio->page, fio);
fe16efe6 957skip:
fb830fc5
CY		 958 if (fio->in_list)
959 goto next;
fe16efe6 960out:
4354994f 961 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
00e09c0b 962 !f2fs_is_checkpoint_ready(sbi))
5ce80586 963 __submit_merged_bio(io);
df0f8dc0 964 up_write(&io->io_rwsem);
93dfe2ac
JK		 965}
966
95ae251f
EB		 967static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
968{
969 return fsverity_active(inode) &&
970 idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
971}
972
13ba41e3 973static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
95ae251f 974 unsigned nr_pages, unsigned op_flag,
0683728a 975 pgoff_t first_idx, bool for_write)
13ba41e3
JK		 976{
977 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ba41e3 978 struct bio *bio;
6dbb1796
EB		 979 struct bio_post_read_ctx *ctx;
980 unsigned int post_read_steps = 0;
13ba41e3 981
0683728a
CY		 982 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES),
983 for_write);
6dbb1796 984 if (!bio)
13ba41e3 985 return ERR_PTR(-ENOMEM);
13ba41e3
JK		 986 f2fs_target_device(sbi, blkaddr, bio);
987 bio->bi_end_io = f2fs_read_end_io;
e2e59414 988 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
13ba41e3 989
6dbb1796
EB		 990 if (f2fs_encrypted_file(inode))
991 post_read_steps |= 1 << STEP_DECRYPT;
4c8ff709
CY		 992 if (f2fs_compressed_file(inode))
993 post_read_steps |= 1 << STEP_DECOMPRESS;
95ae251f
EB		 994 if (f2fs_need_verity(inode, first_idx))
995 post_read_steps |= 1 << STEP_VERITY;
996
6dbb1796 997 if (post_read_steps) {
e8ce5749 998 /* Due to the mempool, this never fails. */
6dbb1796 999 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
6dbb1796 1000 ctx->bio = bio;
4c8ff709 1001 ctx->sbi = sbi;
6dbb1796
EB		 1002 ctx->enabled_steps = post_read_steps;
1003 bio->bi_private = ctx;
6dbb1796
EB		 1004 }
1005
13ba41e3
JK		 1006 return bio;
1007}
1008
4c8ff709
CY		 1009static void f2fs_release_read_bio(struct bio *bio)
1010{
1011 if (bio->bi_private)
1012 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
1013 bio_put(bio);
1014}
1015
13ba41e3
JK		 1016/* This can handle encryption stuffs */
1017static int f2fs_submit_page_read(struct inode *inode, struct page *page,
0683728a 1018 block_t blkaddr, bool for_write)
13ba41e3 1019{
93770ab7
CY		 1020 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1021 struct bio *bio;
13ba41e3 1022
0683728a 1023 bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index, for_write);
13ba41e3
JK		 1024 if (IS_ERR(bio))
1025 return PTR_ERR(bio);
1026
0ded69f6
JK		 1027 /* wait for GCed page writeback via META_MAPPING */
1028 f2fs_wait_on_block_writeback(inode, blkaddr);
1029
13ba41e3
JK		 1030 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1031 bio_put(bio);
1032 return -EFAULT;
1033 }
fb7d70db 1034 ClearPageError(page);
93770ab7 1035 inc_page_count(sbi, F2FS_RD_DATA);
8b83ac81 1036 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
93770ab7 1037 __submit_bio(sbi, bio, DATA);
13ba41e3
JK		 1038 return 0;
1039}
1040
46008c6d
CY		 1041static void __set_data_blkaddr(struct dnode_of_data *dn)
1042{
1043 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
1044 __le32 *addr_array;
7a2af766
CY		 1045 int base = 0;
1046
1047 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
1048 base = get_extra_isize(dn->inode);
46008c6d
CY		 1049
1050 /* Get physical address of data block */
1051 addr_array = blkaddr_in_node(rn);
7a2af766 1052 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
46008c6d
CY		 1053}
1054
0a8165d7 1055/*
eb47b800
JK		 1056 * Lock ordering for the change of data block address:
1057 * ->data_page
1058 * ->node_page
1059 * update block addresses in the node page
1060 */
4d57b86d 1061void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
eb47b800 1062{
bae0ee7a 1063 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1064 __set_data_blkaddr(dn);
1065 if (set_page_dirty(dn->node_page))
12719ae1 1066 dn->node_changed = true;
eb47b800
JK		 1067}
1068
f28b3434
CY		 1069void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
1070{
1071 dn->data_blkaddr = blkaddr;
4d57b86d 1072 f2fs_set_data_blkaddr(dn);
f28b3434
CY		 1073 f2fs_update_extent_cache(dn);
1074}
1075
46008c6d 1076/* dn->ofs_in_node will be returned with up-to-date last block pointer */
4d57b86d 1077int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
eb47b800 1078{
4081363f 1079 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
0abd675e 1080 int err;
eb47b800 1081
46008c6d
CY		 1082 if (!count)
1083 return 0;
1084
91942321 1085 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
eb47b800 1086 return -EPERM;
0abd675e
CY		 1087 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1088 return err;
eb47b800 1089
46008c6d
CY		 1090 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
1091 dn->ofs_in_node, count);
1092
bae0ee7a 1093 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1094
1095 for (; count > 0; dn->ofs_in_node++) {
a2ced1ce 1096 block_t blkaddr = f2fs_data_blkaddr(dn);
46008c6d
CY		 1097 if (blkaddr == NULL_ADDR) {
1098 dn->data_blkaddr = NEW_ADDR;
1099 __set_data_blkaddr(dn);
1100 count--;
1101 }
1102 }
1103
1104 if (set_page_dirty(dn->node_page))
1105 dn->node_changed = true;
eb47b800
JK		 1106 return 0;
1107}
1108
46008c6d 1109/* Should keep dn->ofs_in_node unchanged */
4d57b86d 1110int f2fs_reserve_new_block(struct dnode_of_data *dn)
46008c6d
CY		 1111{
1112 unsigned int ofs_in_node = dn->ofs_in_node;
1113 int ret;
1114
4d57b86d 1115 ret = f2fs_reserve_new_blocks(dn, 1);
46008c6d
CY		 1116 dn->ofs_in_node = ofs_in_node;
1117 return ret;
1118}
1119
b600965c
HL		 1120int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
1121{
1122 bool need_put = dn->inode_page ? false : true;
1123 int err;
1124
4d57b86d 1125 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
b600965c
HL		 1126 if (err)
1127 return err;
a8865372 1128
b600965c 1129 if (dn->data_blkaddr == NULL_ADDR)
4d57b86d 1130 err = f2fs_reserve_new_block(dn);
a8865372 1131 if (err || need_put)
b600965c
HL		 1132 f2fs_put_dnode(dn);
1133 return err;
1134}
1135
759af1c9 1136int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
eb47b800 1137{
e15882b6 1138 struct extent_info ei = {0,0,0};
759af1c9 1139 struct inode *inode = dn->inode;
028a41e8 1140
759af1c9
FL		 1141 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1142 dn->data_blkaddr = ei.blk + index - ei.fofs;
1143 return 0;
429511cd 1144 }
028a41e8 1145
759af1c9 1146 return f2fs_reserve_block(dn, index);
eb47b800
JK		 1147}
1148
4d57b86d 1149struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
04d328de 1150 int op_flags, bool for_write)
eb47b800 1151{
eb47b800
JK		 1152 struct address_space *mapping = inode->i_mapping;
1153 struct dnode_of_data dn;
1154 struct page *page;
e15882b6 1155 struct extent_info ei = {0,0,0};
eb47b800 1156 int err;
4375a336 1157
a56c7c6f 1158 page = f2fs_grab_cache_page(mapping, index, for_write);
650495de
JK		 1159 if (!page)
1160 return ERR_PTR(-ENOMEM);
1161
cb3bc9ee
CY		 1162 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1163 dn.data_blkaddr = ei.blk + index - ei.fofs;
93770ab7
CY		 1164 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1165 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1166 err = -EFSCORRUPTED;
93770ab7
CY		 1167 goto put_err;
1168 }
cb3bc9ee
CY		 1169 goto got_it;
1170 }
1171
eb47b800 1172 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1173 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
86531d6b
JK		 1174 if (err)
1175 goto put_err;
eb47b800
JK		 1176 f2fs_put_dnode(&dn);
1177
6bacf52f 1178 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
86531d6b
JK		 1179 err = -ENOENT;
1180 goto put_err;
650495de 1181 }
93770ab7
CY		 1182 if (dn.data_blkaddr != NEW_ADDR &&
1183 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1184 dn.data_blkaddr,
1185 DATA_GENERIC_ENHANCE)) {
10f966bb 1186 err = -EFSCORRUPTED;
93770ab7
CY		 1187 goto put_err;
1188 }
cb3bc9ee 1189got_it:
43f3eae1
JK		 1190 if (PageUptodate(page)) {
1191 unlock_page(page);
eb47b800 1192 return page;
43f3eae1 1193 }
eb47b800 1194
d59ff4df
JK		 1195 /*
1196 * A new dentry page is allocated but not able to be written, since its
1197 * new inode page couldn't be allocated due to -ENOSPC.
1198 * In such the case, its blkaddr can be remained as NEW_ADDR.
4d57b86d
CY		 1199 * see, f2fs_add_link -> f2fs_get_new_data_page ->
1200 * f2fs_init_inode_metadata.
d59ff4df
JK		 1201 */
1202 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1203 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1204 if (!PageUptodate(page))
1205 SetPageUptodate(page);
43f3eae1 1206 unlock_page(page);
d59ff4df
JK		 1207 return page;
1208 }
eb47b800 1209
0683728a 1210 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr, for_write);
393ff91f 1211 if (err)
86531d6b 1212 goto put_err;
43f3eae1 1213 return page;
86531d6b
JK		 1214
1215put_err:
1216 f2fs_put_page(page, 1);
1217 return ERR_PTR(err);
43f3eae1
JK		 1218}
1219
4d57b86d 1220struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
43f3eae1
JK		 1221{
1222 struct address_space *mapping = inode->i_mapping;
1223 struct page *page;
1224
1225 page = find_get_page(mapping, index);
1226 if (page && PageUptodate(page))
1227 return page;
1228 f2fs_put_page(page, 0);
1229
4d57b86d 1230 page = f2fs_get_read_data_page(inode, index, 0, false);
43f3eae1
JK		 1231 if (IS_ERR(page))
1232 return page;
1233
1234 if (PageUptodate(page))
1235 return page;
1236
1237 wait_on_page_locked(page);
1238 if (unlikely(!PageUptodate(page))) {
1239 f2fs_put_page(page, 0);
1240 return ERR_PTR(-EIO);
1241 }
1242 return page;
1243}
1244
1245/*
1246 * If it tries to access a hole, return an error.
1247 * Because, the callers, functions in dir.c and GC, should be able to know
1248 * whether this page exists or not.
1249 */
4d57b86d 1250struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
a56c7c6f 1251 bool for_write)
43f3eae1
JK		 1252{
1253 struct address_space *mapping = inode->i_mapping;
1254 struct page *page;
1255repeat:
4d57b86d 1256 page = f2fs_get_read_data_page(inode, index, 0, for_write);
43f3eae1
JK		 1257 if (IS_ERR(page))
1258 return page;
393ff91f 1259
43f3eae1 1260 /* wait for read completion */
393ff91f 1261 lock_page(page);
6bacf52f 1262 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 1263 f2fs_put_page(page, 1);
1264 goto repeat;
eb47b800 1265 }
1563ac75
CY		 1266 if (unlikely(!PageUptodate(page))) {
1267 f2fs_put_page(page, 1);
1268 return ERR_PTR(-EIO);
1269 }
eb47b800
JK		 1270 return page;
1271}
1272
0a8165d7 1273/*
eb47b800
JK		 1274 * Caller ensures that this data page is never allocated.
1275 * A new zero-filled data page is allocated in the page cache.
39936837 1276 *
4f4124d0
CY		 1277 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
1278 * f2fs_unlock_op().
470f00e9
CY		 1279 * Note that, ipage is set only by make_empty_dir, and if any error occur,
1280 * ipage should be released by this function.
eb47b800 1281 */
4d57b86d 1282struct page *f2fs_get_new_data_page(struct inode *inode,
a8865372 1283 struct page *ipage, pgoff_t index, bool new_i_size)
eb47b800 1284{
eb47b800
JK		 1285 struct address_space *mapping = inode->i_mapping;
1286 struct page *page;
1287 struct dnode_of_data dn;
1288 int err;
7612118a 1289
a56c7c6f 1290 page = f2fs_grab_cache_page(mapping, index, true);
470f00e9
CY		 1291 if (!page) {
1292 /*
1293 * before exiting, we should make sure ipage will be released
1294 * if any error occur.
1295 */
1296 f2fs_put_page(ipage, 1);
01f28610 1297 return ERR_PTR(-ENOMEM);
470f00e9 1298 }
eb47b800 1299
a8865372 1300 set_new_dnode(&dn, inode, ipage, NULL, 0);
b600965c 1301 err = f2fs_reserve_block(&dn, index);
01f28610
JK		 1302 if (err) {
1303 f2fs_put_page(page, 1);
eb47b800 1304 return ERR_PTR(err);
a8865372 1305 }
01f28610
JK		 1306 if (!ipage)
1307 f2fs_put_dnode(&dn);
eb47b800
JK		 1308
1309 if (PageUptodate(page))
01f28610 1310 goto got_it;
eb47b800
JK		 1311
1312 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1313 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1314 if (!PageUptodate(page))
1315 SetPageUptodate(page);
eb47b800 1316 } else {
4375a336 1317 f2fs_put_page(page, 1);
a8865372 1318
7612118a
JK		 1319 /* if ipage exists, blkaddr should be NEW_ADDR */
1320 f2fs_bug_on(F2FS_I_SB(inode), ipage);
4d57b86d 1321 page = f2fs_get_lock_data_page(inode, index, true);
4375a336 1322 if (IS_ERR(page))
7612118a 1323 return page;
eb47b800 1324 }
01f28610 1325got_it:
9edcdabf 1326 if (new_i_size && i_size_read(inode) <
ee6d182f 1327 ((loff_t)(index + 1) << PAGE_SHIFT))
fc9581c8 1328 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
eb47b800
JK		 1329 return page;
1330}
1331
d5097be5 1332static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
bfad7c2d 1333{
4081363f 1334 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
bfad7c2d 1335 struct f2fs_summary sum;
bfad7c2d 1336 struct node_info ni;
6aa58d8a 1337 block_t old_blkaddr;
46008c6d 1338 blkcnt_t count = 1;
0abd675e 1339 int err;
bfad7c2d 1340
91942321 1341 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
bfad7c2d 1342 return -EPERM;
df6136ef 1343
7735730d
CY		 1344 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1345 if (err)
1346 return err;
1347
a2ced1ce 1348 dn->data_blkaddr = f2fs_data_blkaddr(dn);
f847c699 1349 if (dn->data_blkaddr != NULL_ADDR)
df6136ef
CY		 1350 goto alloc;
1351
0abd675e
CY		 1352 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1353 return err;
bfad7c2d 1354
df6136ef 1355alloc:
bfad7c2d 1356 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
6aa58d8a
CY		 1357 old_blkaddr = dn->data_blkaddr;
1358 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
d5097be5 1359 &sum, seg_type, NULL, false);
6aa58d8a
CY		 1360 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1361 invalidate_mapping_pages(META_MAPPING(sbi),
1362 old_blkaddr, old_blkaddr);
86f35dc3 1363 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
bfad7c2d 1364
0a4daae5
JK		 1365 /*
1366 * i_size will be updated by direct_IO. Otherwise, we'll get stale
1367 * data from unwritten block via dio_read.
1368 */
bfad7c2d
JK		 1369 return 0;
1370}
1371
a7de6086 1372int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
59b802e5 1373{
b439b103 1374 struct inode *inode = file_inode(iocb->ki_filp);
5b8db7fa 1375 struct f2fs_map_blocks map;
d6d478a1 1376 int flag;
a7de6086 1377 int err = 0;
d6d478a1 1378 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
59b802e5 1379
0080c507 1380 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
dfd02e4d
CY		 1381 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1382 if (map.m_len > map.m_lblk)
1383 map.m_len -= map.m_lblk;
1384 else
1385 map.m_len = 0;
1386
da85985c 1387 map.m_next_pgofs = NULL;
c4020b2d 1388 map.m_next_extent = NULL;
d5097be5 1389 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1390 map.m_may_create = true;
2a340760 1391
d6d478a1 1392 if (direct_io) {
4d57b86d 1393 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
f847c699 1394 flag = f2fs_force_buffered_io(inode, iocb, from) ?
d6d478a1
CY		 1395 F2FS_GET_BLOCK_PRE_AIO :
1396 F2FS_GET_BLOCK_PRE_DIO;
1397 goto map_blocks;
d5097be5 1398 }
f2470371 1399 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
a7de6086
JK		 1400 err = f2fs_convert_inline_inode(inode);
1401 if (err)
1402 return err;
b439b103 1403 }
d6d478a1 1404 if (f2fs_has_inline_data(inode))
25006645 1405 return err;
d6d478a1
CY		 1406
1407 flag = F2FS_GET_BLOCK_PRE_AIO;
1408
1409map_blocks:
1410 err = f2fs_map_blocks(inode, &map, 1, flag);
1411 if (map.m_len > 0 && err == -ENOSPC) {
1412 if (!direct_io)
1413 set_inode_flag(inode, FI_NO_PREALLOC);
1414 err = 0;
25006645 1415 }
a7de6086 1416 return err;
59b802e5
JK		 1417}
1418
39a86958 1419void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
59c9081b
YH		 1420{
1421 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1422 if (lock)
1423 down_read(&sbi->node_change);
1424 else
1425 up_read(&sbi->node_change);
1426 } else {
1427 if (lock)
1428 f2fs_lock_op(sbi);
1429 else
1430 f2fs_unlock_op(sbi);
1431 }
1432}
1433
0a8165d7 1434/*
7a88ddb5
CY		 1435 * f2fs_map_blocks() tries to find or build mapping relationship which
1436 * maps continuous logical blocks to physical blocks, and return such
1437 * info via f2fs_map_blocks structure.
eb47b800 1438 */
d323d005 1439int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
e2b4e2bc 1440 int create, int flag)
eb47b800 1441{
003a3e1d 1442 unsigned int maxblocks = map->m_len;
eb47b800 1443 struct dnode_of_data dn;
f9811703 1444 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f9d6d059 1445 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
46008c6d 1446 pgoff_t pgofs, end_offset, end;
bfad7c2d 1447 int err = 0, ofs = 1;
46008c6d
CY		 1448 unsigned int ofs_in_node, last_ofs_in_node;
1449 blkcnt_t prealloc;
e15882b6 1450 struct extent_info ei = {0,0,0};
7df3a431 1451 block_t blkaddr;
c4020b2d 1452 unsigned int start_pgofs;
eb47b800 1453
dfd02e4d
CY		 1454 if (!maxblocks)
1455 return 0;
1456
003a3e1d
JK		 1457 map->m_len = 0;
1458 map->m_flags = 0;
1459
1460 /* it only supports block size == page size */
1461 pgofs = (pgoff_t)map->m_lblk;
46008c6d 1462 end = pgofs + maxblocks;
eb47b800 1463
24b84912 1464 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
b0332a0f 1465 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f4f0b677
JZ		 1466 map->m_may_create)
1467 goto next_dnode;
1468
003a3e1d
JK		 1469 map->m_pblk = ei.blk + pgofs - ei.fofs;
1470 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1471 map->m_flags = F2FS_MAP_MAPPED;
c4020b2d
CY		 1472 if (map->m_next_extent)
1473 *map->m_next_extent = pgofs + map->m_len;
1e78e8bd
ST		 1474
1475 /* for hardware encryption, but to avoid potential issue in future */
1476 if (flag == F2FS_GET_BLOCK_DIO)
1477 f2fs_wait_on_block_writeback_range(inode,
1478 map->m_pblk, map->m_len);
bfad7c2d 1479 goto out;
a2e7d1bf 1480 }
bfad7c2d 1481
4fe71e88 1482next_dnode:
f9d6d059 1483 if (map->m_may_create)
59c9081b 1484 __do_map_lock(sbi, flag, true);
eb47b800
JK		 1485
1486 /* When reading holes, we need its node page */
1487 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1488 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1ec79083 1489 if (err) {
43473f96
CY		 1490 if (flag == F2FS_GET_BLOCK_BMAP)
1491 map->m_pblk = 0;
da85985c 1492 if (err == -ENOENT) {
bfad7c2d 1493 err = 0;
da85985c
CY		 1494 if (map->m_next_pgofs)
1495 *map->m_next_pgofs =
4d57b86d 1496 f2fs_get_next_page_offset(&dn, pgofs);
c4020b2d
CY		 1497 if (map->m_next_extent)
1498 *map->m_next_extent =
4d57b86d 1499 f2fs_get_next_page_offset(&dn, pgofs);
da85985c 1500 }
bfad7c2d 1501 goto unlock_out;
848753aa 1502 }
973163fc 1503
c4020b2d 1504 start_pgofs = pgofs;
46008c6d 1505 prealloc = 0;
230436b3 1506 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
81ca7350 1507 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
4fe71e88
CY		 1508
1509next_block:
a2ced1ce 1510 blkaddr = f2fs_data_blkaddr(&dn);
4fe71e88 1511
c9b60788 1512 if (__is_valid_data_blkaddr(blkaddr) &&
93770ab7 1513 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
10f966bb 1514 err = -EFSCORRUPTED;
c9b60788
CY		 1515 goto sync_out;
1516 }
1517
93770ab7 1518 if (__is_valid_data_blkaddr(blkaddr)) {
f847c699 1519 /* use out-place-update for driect IO under LFS mode */
b0332a0f 1520 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f9d6d059 1521 map->m_may_create) {
f847c699 1522 err = __allocate_data_block(&dn, map->m_seg_type);
05e36006
CY		 1523 if (err)
1524 goto sync_out;
1525 blkaddr = dn.data_blkaddr;
1526 set_inode_flag(inode, FI_APPEND_WRITE);
f847c699
CY		 1527 }
1528 } else {
973163fc 1529 if (create) {
f9811703
CY		 1530 if (unlikely(f2fs_cp_error(sbi))) {
1531 err = -EIO;
4fe71e88 1532 goto sync_out;
f9811703 1533 }
24b84912 1534 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
46008c6d
CY		 1535 if (blkaddr == NULL_ADDR) {
1536 prealloc++;
1537 last_ofs_in_node = dn.ofs_in_node;
1538 }
24b84912 1539 } else {
0a4daae5
JK		 1540 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1541 flag != F2FS_GET_BLOCK_DIO);
d5097be5
HL		 1542 err = __allocate_data_block(&dn,
1543 map->m_seg_type);
6f2d8ed6 1544 if (!err)
91942321 1545 set_inode_flag(inode, FI_APPEND_WRITE);
24b84912 1546 }
973163fc 1547 if (err)
4fe71e88 1548 goto sync_out;
3f2be043 1549 map->m_flags |= F2FS_MAP_NEW;
4fe71e88 1550 blkaddr = dn.data_blkaddr;
973163fc 1551 } else {
43473f96
CY		 1552 if (flag == F2FS_GET_BLOCK_BMAP) {
1553 map->m_pblk = 0;
1554 goto sync_out;
1555 }
c4020b2d
CY		 1556 if (flag == F2FS_GET_BLOCK_PRECACHE)
1557 goto sync_out;
da85985c
CY		 1558 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1559 blkaddr == NULL_ADDR) {
1560 if (map->m_next_pgofs)
1561 *map->m_next_pgofs = pgofs + 1;
4c2ac6a8 1562 goto sync_out;
da85985c 1563 }
f3d98e74
CY		 1564 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1565 /* for defragment case */
1566 if (map->m_next_pgofs)
1567 *map->m_next_pgofs = pgofs + 1;
4fe71e88 1568 goto sync_out;
f3d98e74 1569 }
e2b4e2bc 1570 }
e2b4e2bc 1571 }
eb47b800 1572
46008c6d
CY		 1573 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1574 goto skip;
1575
4fe71e88
CY		 1576 if (map->m_len == 0) {
1577 /* preallocated unwritten block should be mapped for fiemap. */
1578 if (blkaddr == NEW_ADDR)
1579 map->m_flags |= F2FS_MAP_UNWRITTEN;
1580 map->m_flags |= F2FS_MAP_MAPPED;
1581
1582 map->m_pblk = blkaddr;
1583 map->m_len = 1;
1584 } else if ((map->m_pblk != NEW_ADDR &&
1585 blkaddr == (map->m_pblk + ofs)) ||
b439b103 1586 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
46008c6d 1587 flag == F2FS_GET_BLOCK_PRE_DIO) {
4fe71e88
CY		 1588 ofs++;
1589 map->m_len++;
1590 } else {
1591 goto sync_out;
1592 }
bfad7c2d 1593
46008c6d 1594skip:
bfad7c2d
JK		 1595 dn.ofs_in_node++;
1596 pgofs++;
1597
46008c6d
CY		 1598 /* preallocate blocks in batch for one dnode page */
1599 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1600 (pgofs == end || dn.ofs_in_node == end_offset)) {
7df3a431 1601
46008c6d 1602 dn.ofs_in_node = ofs_in_node;
4d57b86d 1603 err = f2fs_reserve_new_blocks(&dn, prealloc);
46008c6d
CY		 1604 if (err)
1605 goto sync_out;
bfad7c2d 1606
46008c6d
CY		 1607 map->m_len += dn.ofs_in_node - ofs_in_node;
1608 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1609 err = -ENOSPC;
1610 goto sync_out;
3104af35 1611 }
46008c6d
CY		 1612 dn.ofs_in_node = end_offset;
1613 }
1614
1615 if (pgofs >= end)
1616 goto sync_out;
1617 else if (dn.ofs_in_node < end_offset)
1618 goto next_block;
1619
c4020b2d
CY		 1620 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1621 if (map->m_flags & F2FS_MAP_MAPPED) {
1622 unsigned int ofs = start_pgofs - map->m_lblk;
1623
1624 f2fs_update_extent_cache_range(&dn,
1625 start_pgofs, map->m_pblk + ofs,
1626 map->m_len - ofs);
1627 }
1628 }
1629
46008c6d
CY		 1630 f2fs_put_dnode(&dn);
1631
f9d6d059 1632 if (map->m_may_create) {
59c9081b 1633 __do_map_lock(sbi, flag, false);
6f2d8ed6 1634 f2fs_balance_fs(sbi, dn.node_changed);
eb47b800 1635 }
46008c6d 1636 goto next_dnode;
7df3a431 1637
bfad7c2d 1638sync_out:
1e78e8bd
ST		 1639
1640 /* for hardware encryption, but to avoid potential issue in future */
1641 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1642 f2fs_wait_on_block_writeback_range(inode,
1643 map->m_pblk, map->m_len);
1644
c4020b2d
CY		 1645 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1646 if (map->m_flags & F2FS_MAP_MAPPED) {
1647 unsigned int ofs = start_pgofs - map->m_lblk;
1648
1649 f2fs_update_extent_cache_range(&dn,
1650 start_pgofs, map->m_pblk + ofs,
1651 map->m_len - ofs);
1652 }
1653 if (map->m_next_extent)
1654 *map->m_next_extent = pgofs + 1;
1655 }
eb47b800 1656 f2fs_put_dnode(&dn);
bfad7c2d 1657unlock_out:
f9d6d059 1658 if (map->m_may_create) {
59c9081b 1659 __do_map_lock(sbi, flag, false);
6f2d8ed6 1660 f2fs_balance_fs(sbi, dn.node_changed);
2a340760 1661 }
bfad7c2d 1662out:
003a3e1d 1663 trace_f2fs_map_blocks(inode, map, err);
bfad7c2d 1664 return err;
eb47b800
JK		 1665}
1666
b91050a8
HL		 1667bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1668{
1669 struct f2fs_map_blocks map;
1670 block_t last_lblk;
1671 int err;
1672
1673 if (pos + len > i_size_read(inode))
1674 return false;
1675
1676 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1677 map.m_next_pgofs = NULL;
1678 map.m_next_extent = NULL;
1679 map.m_seg_type = NO_CHECK_TYPE;
f4f0b677 1680 map.m_may_create = false;
b91050a8
HL		 1681 last_lblk = F2FS_BLK_ALIGN(pos + len);
1682
1683 while (map.m_lblk < last_lblk) {
1684 map.m_len = last_lblk - map.m_lblk;
1685 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1686 if (err || map.m_len == 0)
1687 return false;
1688 map.m_lblk += map.m_len;
1689 }
1690 return true;
1691}
1692
003a3e1d 1693static int __get_data_block(struct inode *inode, sector_t iblock,
da85985c 1694 struct buffer_head *bh, int create, int flag,
f9d6d059 1695 pgoff_t *next_pgofs, int seg_type, bool may_write)
003a3e1d
JK		 1696{
1697 struct f2fs_map_blocks map;
a7de6086 1698 int err;
003a3e1d
JK		 1699
1700 map.m_lblk = iblock;
1701 map.m_len = bh->b_size >> inode->i_blkbits;
da85985c 1702 map.m_next_pgofs = next_pgofs;
c4020b2d 1703 map.m_next_extent = NULL;
d5097be5 1704 map.m_seg_type = seg_type;
f9d6d059 1705 map.m_may_create = may_write;
003a3e1d 1706
a7de6086
JK		 1707 err = f2fs_map_blocks(inode, &map, create, flag);
1708 if (!err) {
003a3e1d
JK		 1709 map_bh(bh, inode->i_sb, map.m_pblk);
1710 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
b86e3307 1711 bh->b_size = (u64)map.m_len << inode->i_blkbits;
003a3e1d 1712 }
a7de6086 1713 return err;
003a3e1d
JK		 1714}
1715
ccfb3000 1716static int get_data_block(struct inode *inode, sector_t iblock,
da85985c
CY		 1717 struct buffer_head *bh_result, int create, int flag,
1718 pgoff_t *next_pgofs)
e2b4e2bc 1719{
da85985c 1720 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1721 flag, next_pgofs,
f9d6d059
CY		 1722 NO_CHECK_TYPE, create);
1723}
1724
1725static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1726 struct buffer_head *bh_result, int create)
1727{
1728 return __get_data_block(inode, iblock, bh_result, create,
1729 F2FS_GET_BLOCK_DIO, NULL,
1730 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
75a037f3 1731 IS_SWAPFILE(inode) ? false : true);
e2b4e2bc
CY		 1732}
1733
1734static int get_data_block_dio(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1735 struct buffer_head *bh_result, int create)
1736{
e2b4e2bc 1737 return __get_data_block(inode, iblock, bh_result, create,
f9d6d059
CY		 1738 F2FS_GET_BLOCK_DIO, NULL,
1739 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1740 false);
ccfb3000
JK		 1741}
1742
e2b4e2bc 1743static int get_data_block_bmap(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1744 struct buffer_head *bh_result, int create)
1745{
179448bf 1746 /* Block number less than F2FS MAX BLOCKS */
e0afc4d6 1747 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
179448bf
YH		 1748 return -EFBIG;
1749
e2b4e2bc 1750 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1751 F2FS_GET_BLOCK_BMAP, NULL,
f9d6d059 1752 NO_CHECK_TYPE, create);
ccfb3000
JK		 1753}
1754
7f63eb77
JK		 1755static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1756{
1757 return (offset >> inode->i_blkbits);
1758}
1759
1760static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1761{
1762 return (blk << inode->i_blkbits);
1763}
1764
442a9dbd
CY		 1765static int f2fs_xattr_fiemap(struct inode *inode,
1766 struct fiemap_extent_info *fieinfo)
1767{
1768 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1769 struct page *page;
1770 struct node_info ni;
1771 __u64 phys = 0, len;
1772 __u32 flags;
1773 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1774 int err = 0;
1775
1776 if (f2fs_has_inline_xattr(inode)) {
1777 int offset;
1778
1779 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1780 inode->i_ino, false);
1781 if (!page)
1782 return -ENOMEM;
1783
7735730d
CY		 1784 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1785 if (err) {
1786 f2fs_put_page(page, 1);
1787 return err;
1788 }
442a9dbd
CY		 1789
1790 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1791 offset = offsetof(struct f2fs_inode, i_addr) +
1792 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
b323fd28 1793 get_inline_xattr_addrs(inode));
442a9dbd
CY		 1794
1795 phys += offset;
1796 len = inline_xattr_size(inode);
1797
1798 f2fs_put_page(page, 1);
1799
1800 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1801
1802 if (!xnid)
1803 flags |= FIEMAP_EXTENT_LAST;
1804
1805 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1806 if (err || err == 1)
1807 return err;
1808 }
1809
1810 if (xnid) {
1811 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1812 if (!page)
1813 return -ENOMEM;
1814
7735730d
CY		 1815 err = f2fs_get_node_info(sbi, xnid, &ni);
1816 if (err) {
1817 f2fs_put_page(page, 1);
1818 return err;
1819 }
442a9dbd
CY		 1820
1821 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1822 len = inode->i_sb->s_blocksize;
1823
1824 f2fs_put_page(page, 1);
1825
1826 flags = FIEMAP_EXTENT_LAST;
1827 }
1828
1829 if (phys)
1830 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1831
1832 return (err < 0 ? err : 0);
1833}
1834
9ab70134
JK		 1835int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1836 u64 start, u64 len)
1837{
7f63eb77
JK		 1838 struct buffer_head map_bh;
1839 sector_t start_blk, last_blk;
da85985c 1840 pgoff_t next_pgofs;
7f63eb77
JK		 1841 u64 logical = 0, phys = 0, size = 0;
1842 u32 flags = 0;
7f63eb77
JK		 1843 int ret = 0;
1844
c4020b2d
CY		 1845 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1846 ret = f2fs_precache_extents(inode);
1847 if (ret)
1848 return ret;
1849 }
1850
442a9dbd 1851 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
7f63eb77
JK		 1852 if (ret)
1853 return ret;
1854
f1b43d4c
CY		 1855 inode_lock(inode);
1856
442a9dbd
CY		 1857 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1858 ret = f2fs_xattr_fiemap(inode, fieinfo);
1859 goto out;
1860 }
1861
7975f349 1862 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
67f8cf3c
JK		 1863 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1864 if (ret != -EAGAIN)
f1b43d4c 1865 goto out;
67f8cf3c
JK		 1866 }
1867
7f63eb77
JK		 1868 if (logical_to_blk(inode, len) == 0)
1869 len = blk_to_logical(inode, 1);
1870
1871 start_blk = logical_to_blk(inode, start);
1872 last_blk = logical_to_blk(inode, start + len - 1);
9a950d52 1873
7f63eb77
JK		 1874next:
1875 memset(&map_bh, 0, sizeof(struct buffer_head));
1876 map_bh.b_size = len;
1877
e2b4e2bc 1878 ret = get_data_block(inode, start_blk, &map_bh, 0,
da85985c 1879 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
7f63eb77
JK		 1880 if (ret)
1881 goto out;
1882
1883 /* HOLE */
1884 if (!buffer_mapped(&map_bh)) {
da85985c 1885 start_blk = next_pgofs;
58736fa6
CY		 1886
1887 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
1888 F2FS_I_SB(inode)->max_file_blocks))
9a950d52 1889 goto prep_next;
58736fa6 1890
9a950d52
FL		 1891 flags |= FIEMAP_EXTENT_LAST;
1892 }
7f63eb77 1893
da5af127 1894 if (size) {
62230e0d 1895 if (IS_ENCRYPTED(inode))
da5af127
CY		 1896 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1897
9a950d52
FL		 1898 ret = fiemap_fill_next_extent(fieinfo, logical,
1899 phys, size, flags);
da5af127 1900 }
7f63eb77 1901
9a950d52
FL		 1902 if (start_blk > last_blk || ret)
1903 goto out;
7f63eb77 1904
9a950d52
FL		 1905 logical = blk_to_logical(inode, start_blk);
1906 phys = blk_to_logical(inode, map_bh.b_blocknr);
1907 size = map_bh.b_size;
1908 flags = 0;
1909 if (buffer_unwritten(&map_bh))
1910 flags = FIEMAP_EXTENT_UNWRITTEN;
7f63eb77 1911
9a950d52 1912 start_blk += logical_to_blk(inode, size);
7f63eb77 1913
9a950d52 1914prep_next:
7f63eb77
JK		 1915 cond_resched();
1916 if (fatal_signal_pending(current))
1917 ret = -EINTR;
1918 else
1919 goto next;
1920out:
1921 if (ret == 1)
1922 ret = 0;
1923
5955102c 1924 inode_unlock(inode);
7f63eb77 1925 return ret;
9ab70134
JK		 1926}
1927
95ae251f
EB		 1928static inline loff_t f2fs_readpage_limit(struct inode *inode)
1929{
1930 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1931 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1932 return inode->i_sb->s_maxbytes;
1933
1934 return i_size_read(inode);
1935}
1936
2df0ab04
CY		 1937static int f2fs_read_single_page(struct inode *inode, struct page *page,
1938 unsigned nr_pages,
1939 struct f2fs_map_blocks *map,
1940 struct bio **bio_ret,
1941 sector_t *last_block_in_bio,
1942 bool is_readahead)
1943{
1944 struct bio *bio = *bio_ret;
1945 const unsigned blkbits = inode->i_blkbits;
1946 const unsigned blocksize = 1 << blkbits;
1947 sector_t block_in_file;
1948 sector_t last_block;
1949 sector_t last_block_in_file;
1950 sector_t block_nr;
1951 int ret = 0;
1952
4969c06a 1953 block_in_file = (sector_t)page_index(page);
2df0ab04 1954 last_block = block_in_file + nr_pages;
95ae251f 1955 last_block_in_file = (f2fs_readpage_limit(inode) + blocksize - 1) >>
2df0ab04
CY		 1956 blkbits;
1957 if (last_block > last_block_in_file)
1958 last_block = last_block_in_file;
1959
1960 /* just zeroing out page which is beyond EOF */
1961 if (block_in_file >= last_block)
1962 goto zero_out;
1963 /*
1964 * Map blocks using the previous result first.
1965 */
1966 if ((map->m_flags & F2FS_MAP_MAPPED) &&
1967 block_in_file > map->m_lblk &&
1968 block_in_file < (map->m_lblk + map->m_len))
1969 goto got_it;
1970
1971 /*
1972 * Then do more f2fs_map_blocks() calls until we are
1973 * done with this page.
1974 */
1975 map->m_lblk = block_in_file;
1976 map->m_len = last_block - block_in_file;
1977
1978 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
1979 if (ret)
1980 goto out;
1981got_it:
1982 if ((map->m_flags & F2FS_MAP_MAPPED)) {
1983 block_nr = map->m_pblk + block_in_file - map->m_lblk;
1984 SetPageMappedToDisk(page);
1985
4969c06a
JK		 1986 if (!PageUptodate(page) && (!PageSwapCache(page) &&
1987 !cleancache_get_page(page))) {
2df0ab04
CY		 1988 SetPageUptodate(page);
1989 goto confused;
1990 }
1991
1992 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
93770ab7 1993 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1994 ret = -EFSCORRUPTED;
2df0ab04
CY		 1995 goto out;
1996 }
1997 } else {
1998zero_out:
1999 zero_user_segment(page, 0, PAGE_SIZE);
95ae251f
EB		 2000 if (f2fs_need_verity(inode, page->index) &&
2001 !fsverity_verify_page(page)) {
2002 ret = -EIO;
2003 goto out;
2004 }
2df0ab04
CY		 2005 if (!PageUptodate(page))
2006 SetPageUptodate(page);
2007 unlock_page(page);
2008 goto out;
2009 }
2010
2011 /*
2012 * This page will go to BIO. Do we need to send this
2013 * BIO off first?
2014 */
8896cbdf
CY		 2015 if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
2016 *last_block_in_bio, block_nr)) {
2df0ab04
CY		 2017submit_and_realloc:
2018 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2019 bio = NULL;
2020 }
2021 if (bio == NULL) {
2022 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
0683728a
CY		 2023 is_readahead ? REQ_RAHEAD : 0, page->index,
2024 false);
2df0ab04
CY		 2025 if (IS_ERR(bio)) {
2026 ret = PTR_ERR(bio);
2027 bio = NULL;
2028 goto out;
2029 }
2030 }
2031
2032 /*
2033 * If the page is under writeback, we need to wait for
2034 * its completion to see the correct decrypted data.
2035 */
2036 f2fs_wait_on_block_writeback(inode, block_nr);
2037
2038 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2039 goto submit_and_realloc;
2040
2041 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
8b83ac81 2042 f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
2df0ab04
CY		 2043 ClearPageError(page);
2044 *last_block_in_bio = block_nr;
2045 goto out;
2046confused:
2047 if (bio) {
2048 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2049 bio = NULL;
2050 }
2051 unlock_page(page);
2052out:
2053 *bio_ret = bio;
2054 return ret;
2055}
2056
4c8ff709
CY		 2057#ifdef CONFIG_F2FS_FS_COMPRESSION
2058int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2059 unsigned nr_pages, sector_t *last_block_in_bio,
0683728a 2060 bool is_readahead, bool for_write)
4c8ff709
CY		 2061{
2062 struct dnode_of_data dn;
2063 struct inode *inode = cc->inode;
2064 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2065 struct bio *bio = *bio_ret;
2066 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2067 sector_t last_block_in_file;
2068 const unsigned blkbits = inode->i_blkbits;
2069 const unsigned blocksize = 1 << blkbits;
2070 struct decompress_io_ctx *dic = NULL;
2071 int i;
2072 int ret = 0;
2073
2074 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2075
7496affa
CY		 2076 last_block_in_file = (f2fs_readpage_limit(inode) +
2077 blocksize - 1) >> blkbits;
4c8ff709
CY		 2078
2079 /* get rid of pages beyond EOF */
2080 for (i = 0; i < cc->cluster_size; i++) {
2081 struct page *page = cc->rpages[i];
2082
2083 if (!page)
2084 continue;
2085 if ((sector_t)page->index >= last_block_in_file) {
2086 zero_user_segment(page, 0, PAGE_SIZE);
2087 if (!PageUptodate(page))
2088 SetPageUptodate(page);
2089 } else if (!PageUptodate(page)) {
2090 continue;
2091 }
2092 unlock_page(page);
2093 cc->rpages[i] = NULL;
2094 cc->nr_rpages--;
2095 }
2096
2097 /* we are done since all pages are beyond EOF */
2098 if (f2fs_cluster_is_empty(cc))
2099 goto out;
2100
2101 set_new_dnode(&dn, inode, NULL, NULL, 0);
2102 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2103 if (ret)
2104 goto out;
2105
2106 /* cluster was overwritten as normal cluster */
2107 if (dn.data_blkaddr != COMPRESS_ADDR)
2108 goto out;
2109
2110 for (i = 1; i < cc->cluster_size; i++) {
2111 block_t blkaddr;
2112
a2ced1ce 2113 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2114 dn.ofs_in_node + i);
2115
2116 if (!__is_valid_data_blkaddr(blkaddr))
2117 break;
2118
2119 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2120 ret = -EFAULT;
2121 goto out_put_dnode;
2122 }
2123 cc->nr_cpages++;
2124 }
2125
2126 /* nothing to decompress */
2127 if (cc->nr_cpages == 0) {
2128 ret = 0;
2129 goto out_put_dnode;
2130 }
2131
2132 dic = f2fs_alloc_dic(cc);
2133 if (IS_ERR(dic)) {
2134 ret = PTR_ERR(dic);
2135 goto out_put_dnode;
2136 }
2137
2138 for (i = 0; i < dic->nr_cpages; i++) {
2139 struct page *page = dic->cpages[i];
2140 block_t blkaddr;
2141
a2ced1ce 2142 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2143 dn.ofs_in_node + i + 1);
2144
2145 if (bio && !page_is_mergeable(sbi, bio,
2146 *last_block_in_bio, blkaddr)) {
2147submit_and_realloc:
2148 __submit_bio(sbi, bio, DATA);
2149 bio = NULL;
2150 }
2151
2152 if (!bio) {
2153 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2154 is_readahead ? REQ_RAHEAD : 0,
0683728a 2155 page->index, for_write);
4c8ff709
CY		 2156 if (IS_ERR(bio)) {
2157 ret = PTR_ERR(bio);
2158 bio = NULL;
2159 dic->failed = true;
2160 if (refcount_sub_and_test(dic->nr_cpages - i,
2161 &dic->ref))
2162 f2fs_decompress_end_io(dic->rpages,
2163 cc->cluster_size, true,
2164 false);
2165 f2fs_free_dic(dic);
2166 f2fs_put_dnode(&dn);
2167 *bio_ret = bio;
2168 return ret;
2169 }
2170 }
2171
2172 f2fs_wait_on_block_writeback(inode, blkaddr);
2173
2174 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2175 goto submit_and_realloc;
2176
2177 inc_page_count(sbi, F2FS_RD_DATA);
8b83ac81 2178 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
4c8ff709
CY		 2179 ClearPageError(page);
2180 *last_block_in_bio = blkaddr;
2181 }
2182
2183 f2fs_put_dnode(&dn);
2184
2185 *bio_ret = bio;
2186 return 0;
2187
2188out_put_dnode:
2189 f2fs_put_dnode(&dn);
2190out:
2191 f2fs_decompress_end_io(cc->rpages, cc->cluster_size, true, false);
2192 *bio_ret = bio;
2193 return ret;
2194}
2195#endif
2196
f1e88660
JK		 2197/*
2198 * This function was originally taken from fs/mpage.c, and customized for f2fs.
2199 * Major change was from block_size == page_size in f2fs by default.
e2e59414
JK		 2200 *
2201 * Note that the aops->readpages() function is ONLY used for read-ahead. If
2202 * this function ever deviates from doing just read-ahead, it should either
2203 * use ->readpage() or do the necessary surgery to decouple ->readpages()
2204 * from read-ahead.
f1e88660 2205 */
4c8ff709 2206int f2fs_mpage_readpages(struct address_space *mapping,
f1e88660 2207 struct list_head *pages, struct page *page,
e2e59414 2208 unsigned nr_pages, bool is_readahead)
f1e88660
JK		 2209{
2210 struct bio *bio = NULL;
f1e88660
JK		 2211 sector_t last_block_in_bio = 0;
2212 struct inode *inode = mapping->host;
f1e88660 2213 struct f2fs_map_blocks map;
4c8ff709
CY		 2214#ifdef CONFIG_F2FS_FS_COMPRESSION
2215 struct compress_ctx cc = {
2216 .inode = inode,
2217 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2218 .cluster_size = F2FS_I(inode)->i_cluster_size,
2219 .cluster_idx = NULL_CLUSTER,
2220 .rpages = NULL,
2221 .cpages = NULL,
2222 .nr_rpages = 0,
2223 .nr_cpages = 0,
2224 };
2225#endif
2226 unsigned max_nr_pages = nr_pages;
2df0ab04 2227 int ret = 0;
f1e88660
JK		 2228
2229 map.m_pblk = 0;
2230 map.m_lblk = 0;
2231 map.m_len = 0;
2232 map.m_flags = 0;
da85985c 2233 map.m_next_pgofs = NULL;
c4020b2d 2234 map.m_next_extent = NULL;
d5097be5 2235 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 2236 map.m_may_create = false;
f1e88660 2237
736c0a74 2238 for (; nr_pages; nr_pages--) {
f1e88660 2239 if (pages) {
939afa94 2240 page = list_last_entry(pages, struct page, lru);
a83d50bc
KM		 2241
2242 prefetchw(&page->flags);
f1e88660
JK		 2243 list_del(&page->lru);
2244 if (add_to_page_cache_lru(page, mapping,
4969c06a 2245 page_index(page),
8a5c743e 2246 readahead_gfp_mask(mapping)))
f1e88660
JK		 2247 goto next_page;
2248 }
2249
4c8ff709
CY		 2250#ifdef CONFIG_F2FS_FS_COMPRESSION
2251 if (f2fs_compressed_file(inode)) {
2252 /* there are remained comressed pages, submit them */
2253 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2254 ret = f2fs_read_multi_pages(&cc, &bio,
2255 max_nr_pages,
2256 &last_block_in_bio,
0683728a 2257 is_readahead, false);
4c8ff709
CY		 2258 f2fs_destroy_compress_ctx(&cc);
2259 if (ret)
2260 goto set_error_page;
2261 }
2262 ret = f2fs_is_compressed_cluster(inode, page->index);
2263 if (ret < 0)
2264 goto set_error_page;
2265 else if (!ret)
2266 goto read_single_page;
2267
2268 ret = f2fs_init_compress_ctx(&cc);
2269 if (ret)
2270 goto set_error_page;
2271
2272 f2fs_compress_ctx_add_page(&cc, page);
2273
2274 goto next_page;
2275 }
2276read_single_page:
2277#endif
2278
2279 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
2280 &bio, &last_block_in_bio, is_readahead);
2df0ab04 2281 if (ret) {
4c8ff709
CY		 2282#ifdef CONFIG_F2FS_FS_COMPRESSION
2283set_error_page:
2284#endif
2df0ab04 2285 SetPageError(page);
09cbfeaf 2286 zero_user_segment(page, 0, PAGE_SIZE);
f1e88660 2287 unlock_page(page);
f1e88660 2288 }
f1e88660
JK		 2289next_page:
2290 if (pages)
09cbfeaf 2291 put_page(page);
4c8ff709
CY		 2292
2293#ifdef CONFIG_F2FS_FS_COMPRESSION
2294 if (f2fs_compressed_file(inode)) {
2295 /* last page */
2296 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2297 ret = f2fs_read_multi_pages(&cc, &bio,
2298 max_nr_pages,
2299 &last_block_in_bio,
0683728a 2300 is_readahead, false);
4c8ff709
CY		 2301 f2fs_destroy_compress_ctx(&cc);
2302 }
2303 }
2304#endif
f1e88660
JK		 2305 }
2306 BUG_ON(pages && !list_empty(pages));
2307 if (bio)
4fc29c1a 2308 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2df0ab04 2309 return pages ? 0 : ret;
f1e88660
JK		 2310}
2311
eb47b800
JK		 2312static int f2fs_read_data_page(struct file *file, struct page *page)
2313{
4969c06a 2314 struct inode *inode = page_file_mapping(page)->host;
b3d208f9 2315 int ret = -EAGAIN;
9ffe0fb5 2316
c20e89cd
CY		 2317 trace_f2fs_readpage(page, DATA);
2318
4c8ff709
CY		 2319 if (!f2fs_is_compress_backend_ready(inode)) {
2320 unlock_page(page);
2321 return -EOPNOTSUPP;
2322 }
2323
e1c42045 2324 /* If the file has inline data, try to read it directly */
9ffe0fb5
HL		 2325 if (f2fs_has_inline_data(inode))
2326 ret = f2fs_read_inline_data(inode, page);
b3d208f9 2327 if (ret == -EAGAIN)
4969c06a
JK		 2328 ret = f2fs_mpage_readpages(page_file_mapping(page),
2329 NULL, page, 1, false);
9ffe0fb5 2330 return ret;
eb47b800
JK		 2331}
2332
2333static int f2fs_read_data_pages(struct file *file,
2334 struct address_space *mapping,
2335 struct list_head *pages, unsigned nr_pages)
2336{
71cb4aff 2337 struct inode *inode = mapping->host;
939afa94 2338 struct page *page = list_last_entry(pages, struct page, lru);
b8c29400
CY		 2339
2340 trace_f2fs_readpages(inode, page, nr_pages);
9ffe0fb5 2341
4c8ff709
CY		 2342 if (!f2fs_is_compress_backend_ready(inode))
2343 return 0;
2344
9ffe0fb5
HL		 2345 /* If the file has inline data, skip readpages */
2346 if (f2fs_has_inline_data(inode))
2347 return 0;
2348
e2e59414 2349 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
eb47b800
JK		 2350}
2351
4c8ff709 2352int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
7eab0c0d
HP		 2353{
2354 struct inode *inode = fio->page->mapping->host;
4c8ff709 2355 struct page *mpage, *page;
7eab0c0d
HP		 2356 gfp_t gfp_flags = GFP_NOFS;
2357
1958593e 2358 if (!f2fs_encrypted_file(inode))
7eab0c0d
HP		 2359 return 0;
2360
4c8ff709
CY		 2361 page = fio->compressed_page ? fio->compressed_page : fio->page;
2362
6dbb1796 2363 /* wait for GCed page writeback via META_MAPPING */
0ded69f6 2364 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
7eab0c0d
HP		 2365
2366retry_encrypt:
4c8ff709
CY		 2367 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2368 PAGE_SIZE, 0, gfp_flags);
6aa58d8a
CY		 2369 if (IS_ERR(fio->encrypted_page)) {
2370 /* flush pending IOs and wait for a while in the ENOMEM case */
2371 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2372 f2fs_flush_merged_writes(fio->sbi);
5df7731f 2373 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
6aa58d8a
CY		 2374 gfp_flags |= __GFP_NOFAIL;
2375 goto retry_encrypt;
2376 }
2377 return PTR_ERR(fio->encrypted_page);
2378 }
7eab0c0d 2379
6aa58d8a
CY		 2380 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2381 if (mpage) {
2382 if (PageUptodate(mpage))
2383 memcpy(page_address(mpage),
2384 page_address(fio->encrypted_page), PAGE_SIZE);
2385 f2fs_put_page(mpage, 1);
7eab0c0d 2386 }
6aa58d8a 2387 return 0;
7eab0c0d
HP		 2388}
2389
bb9e3bb8
CY		 2390static inline bool check_inplace_update_policy(struct inode *inode,
2391 struct f2fs_io_info *fio)
7eab0c0d 2392{
bb9e3bb8
CY		 2393 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2394 unsigned int policy = SM_I(sbi)->ipu_policy;
7eab0c0d 2395
bb9e3bb8
CY		 2396 if (policy & (0x1 << F2FS_IPU_FORCE))
2397 return true;
4d57b86d 2398 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
bb9e3bb8
CY		 2399 return true;
2400 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2401 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2402 return true;
4d57b86d 2403 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
bb9e3bb8
CY		 2404 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2405 return true;
2406
2407 /*
2408 * IPU for rewrite async pages
2409 */
2410 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2411 fio && fio->op == REQ_OP_WRITE &&
2412 !(fio->op_flags & REQ_SYNC) &&
62230e0d 2413 !IS_ENCRYPTED(inode))
bb9e3bb8
CY		 2414 return true;
2415
2416 /* this is only set during fdatasync */
2417 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2418 is_inode_flag_set(inode, FI_NEED_IPU))
2419 return true;
2420
4354994f
DR		 2421 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2422 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2423 return true;
2424
bb9e3bb8
CY		 2425 return false;
2426}
2427
4d57b86d 2428bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8 2429{
1ad71a27
JK		 2430 if (f2fs_is_pinned_file(inode))
2431 return true;
bb9e3bb8
CY		 2432
2433 /* if this is cold file, we should overwrite to avoid fragmentation */
2434 if (file_is_cold(inode))
2435 return true;
2436
2437 return check_inplace_update_policy(inode, fio);
2438}
2439
4d57b86d 2440bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8
CY		 2441{
2442 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2443
b0332a0f 2444 if (f2fs_lfs_mode(sbi))
bb9e3bb8
CY		 2445 return true;
2446 if (S_ISDIR(inode->i_mode))
2447 return true;
af033b2a
CY		 2448 if (IS_NOQUOTA(inode))
2449 return true;
bb9e3bb8
CY		 2450 if (f2fs_is_atomic_file(inode))
2451 return true;
2452 if (fio) {
2453 if (is_cold_data(fio->page))
2454 return true;
2455 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
2456 return true;
4354994f
DR		 2457 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2458 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2459 return true;
bb9e3bb8
CY		 2460 }
2461 return false;
2462}
2463
7eab0c0d
HP		 2464static inline bool need_inplace_update(struct f2fs_io_info *fio)
2465{
2466 struct inode *inode = fio->page->mapping->host;
2467
4d57b86d 2468 if (f2fs_should_update_outplace(inode, fio))
7eab0c0d
HP		 2469 return false;
2470
4d57b86d 2471 return f2fs_should_update_inplace(inode, fio);
7eab0c0d
HP		 2472}
2473
4d57b86d 2474int f2fs_do_write_data_page(struct f2fs_io_info *fio)
eb47b800 2475{
05ca3632 2476 struct page *page = fio->page;
eb47b800 2477 struct inode *inode = page->mapping->host;
eb47b800 2478 struct dnode_of_data dn;
e959c8f5 2479 struct extent_info ei = {0,0,0};
7735730d 2480 struct node_info ni;
e959c8f5 2481 bool ipu_force = false;
eb47b800
JK		 2482 int err = 0;
2483
2484 set_new_dnode(&dn, inode, NULL, NULL, 0);
e959c8f5
HP		 2485 if (need_inplace_update(fio) &&
2486 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2487 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
a817737e 2488
c9b60788 2489 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2490 DATA_GENERIC_ENHANCE))
10f966bb 2491 return -EFSCORRUPTED;
c9b60788
CY		 2492
2493 ipu_force = true;
2494 fio->need_lock = LOCK_DONE;
2495 goto got_it;
e959c8f5 2496 }
279d6df2 2497
d29460e5
JK		 2498 /* Deadlock due to between page->lock and f2fs_lock_op */
2499 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2500 return -EAGAIN;
279d6df2 2501
4d57b86d 2502 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
eb47b800 2503 if (err)
279d6df2 2504 goto out;
eb47b800 2505
28bc106b 2506 fio->old_blkaddr = dn.data_blkaddr;
eb47b800
JK		 2507
2508 /* This page is already truncated */
7a9d7548 2509 if (fio->old_blkaddr == NULL_ADDR) {
2bca1e23 2510 ClearPageUptodate(page);
2baf0781 2511 clear_cold_data(page);
eb47b800 2512 goto out_writepage;
2bca1e23 2513 }
e959c8f5 2514got_it:
c9b60788
CY		 2515 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2516 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2517 DATA_GENERIC_ENHANCE)) {
10f966bb 2518 err = -EFSCORRUPTED;
c9b60788
CY		 2519 goto out_writepage;
2520 }
eb47b800
JK		 2521 /*
2522 * If current allocation needs SSR,
2523 * it had better in-place writes for updated data.
2524 */
93770ab7
CY		 2525 if (ipu_force ||
2526 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
7b525dd0 2527 need_inplace_update(fio))) {
4c8ff709 2528 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2529 if (err)
2530 goto out_writepage;
2531
2532 set_page_writeback(page);
17c50035 2533 ClearPageError(page);
279d6df2 2534 f2fs_put_dnode(&dn);
cc15620b 2535 if (fio->need_lock == LOCK_REQ)
279d6df2 2536 f2fs_unlock_op(fio->sbi);
4d57b86d 2537 err = f2fs_inplace_write_data(fio);
6492a335
CY		 2538 if (err) {
2539 if (f2fs_encrypted_file(inode))
d2d0727b 2540 fscrypt_finalize_bounce_page(&fio->encrypted_page);
6492a335
CY		 2541 if (PageWriteback(page))
2542 end_page_writeback(page);
cd23ffa9
CY		 2543 } else {
2544 set_inode_flag(inode, FI_UPDATE_WRITE);
6492a335 2545 }
7eab0c0d 2546 trace_f2fs_do_write_data_page(fio->page, IPU);
279d6df2 2547 return err;
eb47b800 2548 }
279d6df2 2549
cc15620b
JK		 2550 if (fio->need_lock == LOCK_RETRY) {
2551 if (!f2fs_trylock_op(fio->sbi)) {
2552 err = -EAGAIN;
2553 goto out_writepage;
2554 }
2555 fio->need_lock = LOCK_REQ;
2556 }
2557
7735730d
CY		 2558 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2559 if (err)
2560 goto out_writepage;
2561
2562 fio->version = ni.version;
2563
4c8ff709 2564 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2565 if (err)
2566 goto out_writepage;
2567
2568 set_page_writeback(page);
17c50035 2569 ClearPageError(page);
cc15620b 2570
4c8ff709
CY		 2571 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2572 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2573
279d6df2 2574 /* LFS mode write path */
4d57b86d 2575 f2fs_outplace_write_data(&dn, fio);
279d6df2
HP		 2576 trace_f2fs_do_write_data_page(page, OPU);
2577 set_inode_flag(inode, FI_APPEND_WRITE);
2578 if (page->index == 0)
2579 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
eb47b800
JK		 2580out_writepage:
2581 f2fs_put_dnode(&dn);
279d6df2 2582out:
cc15620b 2583 if (fio->need_lock == LOCK_REQ)
279d6df2 2584 f2fs_unlock_op(fio->sbi);
eb47b800
JK		 2585 return err;
2586}
2587
4c8ff709 2588int f2fs_write_single_data_page(struct page *page, int *submitted,
8648de2c
CY		 2589 struct bio **bio,
2590 sector_t *last_block,
b0af6d49 2591 struct writeback_control *wbc,
4c8ff709
CY		 2592 enum iostat_type io_type,
2593 int compr_blocks)
eb47b800
JK		 2594{
2595 struct inode *inode = page->mapping->host;
4081363f 2596 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
eb47b800 2597 loff_t i_size = i_size_read(inode);
4c8ff709 2598 const pgoff_t end_index = ((unsigned long long)i_size)
09cbfeaf 2599 >> PAGE_SHIFT;
1f0d5c91 2600 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
9ffe0fb5 2601 unsigned offset = 0;
39936837 2602 bool need_balance_fs = false;
eb47b800 2603 int err = 0;
458e6197 2604 struct f2fs_io_info fio = {
05ca3632 2605 .sbi = sbi,
39d787be 2606 .ino = inode->i_ino,
458e6197 2607 .type = DATA,
04d328de 2608 .op = REQ_OP_WRITE,
7637241e 2609 .op_flags = wbc_to_write_flags(wbc),
e959c8f5 2610 .old_blkaddr = NULL_ADDR,
05ca3632 2611 .page = page,
4375a336 2612 .encrypted_page = NULL,
d68f735b 2613 .submitted = false,
4c8ff709 2614 .compr_blocks = compr_blocks,
cc15620b 2615 .need_lock = LOCK_RETRY,
b0af6d49 2616 .io_type = io_type,
578c6478 2617 .io_wbc = wbc,
8648de2c
CY		 2618 .bio = bio,
2619 .last_block = last_block,
458e6197 2620 };
eb47b800 2621
ecda0de3
CY		 2622 trace_f2fs_writepage(page, DATA);
2623
db198ae0
CY		 2624 /* we should bypass data pages to proceed the kworkder jobs */
2625 if (unlikely(f2fs_cp_error(sbi))) {
2626 mapping_set_error(page->mapping, -EIO);
1174abfd
CY		 2627 /*
2628 * don't drop any dirty dentry pages for keeping lastest
2629 * directory structure.
2630 */
2631 if (S_ISDIR(inode->i_mode))
2632 goto redirty_out;
db198ae0
CY		 2633 goto out;
2634 }
2635
0771fcc7
CY		 2636 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2637 goto redirty_out;
2638
4c8ff709
CY		 2639 if (page->index < end_index ||
2640 f2fs_verity_in_progress(inode) ||
2641 compr_blocks)
39936837 2642 goto write;
eb47b800
JK		 2643
2644 /*
2645 * If the offset is out-of-range of file size,
2646 * this page does not have to be written to disk.
2647 */
09cbfeaf 2648 offset = i_size & (PAGE_SIZE - 1);
76f60268 2649 if ((page->index >= end_index + 1) || !offset)
39936837 2650 goto out;
eb47b800 2651
09cbfeaf 2652 zero_user_segment(page, offset, PAGE_SIZE);
39936837 2653write:
1e84371f
JK		 2654 if (f2fs_is_drop_cache(inode))
2655 goto out;
e6e5f561
JK		 2656 /* we should not write 0'th page having journal header */
2657 if (f2fs_is_volatile_file(inode) && (!page->index ||
2658 (!wbc->for_reclaim &&
4d57b86d 2659 f2fs_available_free_memory(sbi, BASE_CHECK))))
1e84371f 2660 goto redirty_out;
eb47b800 2661
435cbab9
JK		 2662 /* Dentry/quota blocks are controlled by checkpoint */
2663 if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
cc15620b 2664 fio.need_lock = LOCK_DONE;
4d57b86d 2665 err = f2fs_do_write_data_page(&fio);
8618b881
JK		 2666 goto done;
2667 }
9ffe0fb5 2668
8618b881 2669 if (!wbc->for_reclaim)
39936837 2670 need_balance_fs = true;
7f3037a5 2671 else if (has_not_enough_free_secs(sbi, 0, 0))
39936837 2672 goto redirty_out;
ef095d19
JK		 2673 else
2674 set_inode_flag(inode, FI_HOT_DATA);
eb47b800 2675
b3d208f9 2676 err = -EAGAIN;
dd7b2333 2677 if (f2fs_has_inline_data(inode)) {
b3d208f9 2678 err = f2fs_write_inline_data(inode, page);
dd7b2333
YH		 2679 if (!err)
2680 goto out;
2681 }
279d6df2 2682
cc15620b 2683 if (err == -EAGAIN) {
4d57b86d 2684 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2685 if (err == -EAGAIN) {
2686 fio.need_lock = LOCK_REQ;
4d57b86d 2687 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2688 }
2689 }
a0d00fad 2690
eb449797
CY		 2691 if (err) {
2692 file_set_keep_isize(inode);
2693 } else {
c10c9820 2694 spin_lock(&F2FS_I(inode)->i_size_lock);
eb449797
CY		 2695 if (F2FS_I(inode)->last_disk_size < psize)
2696 F2FS_I(inode)->last_disk_size = psize;
c10c9820 2697 spin_unlock(&F2FS_I(inode)->i_size_lock);
eb449797 2698 }
279d6df2 2699
8618b881
JK		 2700done:
2701 if (err && err != -ENOENT)
2702 goto redirty_out;
eb47b800 2703
39936837 2704out:
a7ffdbe2 2705 inode_dec_dirty_pages(inode);
2baf0781 2706 if (err) {
2bca1e23 2707 ClearPageUptodate(page);
2baf0781
CY		 2708 clear_cold_data(page);
2709 }
0c3a5797
CY		 2710
2711 if (wbc->for_reclaim) {
bab475c5 2712 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
ef095d19 2713 clear_inode_flag(inode, FI_HOT_DATA);
4d57b86d 2714 f2fs_remove_dirty_inode(inode);
d68f735b 2715 submitted = NULL;
0c3a5797 2716 }
eb47b800 2717 unlock_page(page);
186857c5 2718 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
0b20fcec 2719 !F2FS_I(inode)->cp_task)
a7881893 2720 f2fs_balance_fs(sbi, need_balance_fs);
0c3a5797 2721
d68f735b 2722 if (unlikely(f2fs_cp_error(sbi))) {
b9109b0e 2723 f2fs_submit_merged_write(sbi, DATA);
0b20fcec 2724 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
d68f735b
JK		 2725 submitted = NULL;
2726 }
2727
2728 if (submitted)
4c8ff709 2729 *submitted = fio.submitted ? 1 : 0;
0c3a5797 2730
eb47b800
JK		 2731 return 0;
2732
eb47b800 2733redirty_out:
76f60268 2734 redirty_page_for_writepage(wbc, page);
5b19d284
JK		 2735 /*
2736 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2737 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2738 * file_write_and_wait_range() will see EIO error, which is critical
2739 * to return value of fsync() followed by atomic_write failure to user.
2740 */
2741 if (!err || wbc->for_reclaim)
0002b61b 2742 return AOP_WRITEPAGE_ACTIVATE;
b230e6ca
JK		 2743 unlock_page(page);
2744 return err;
fa9150a8
NJ		 2745}
2746
f566bae8
JK		 2747static int f2fs_write_data_page(struct page *page,
2748 struct writeback_control *wbc)
2749{
4c8ff709
CY		 2750#ifdef CONFIG_F2FS_FS_COMPRESSION
2751 struct inode *inode = page->mapping->host;
2752
2753 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2754 goto out;
2755
2756 if (f2fs_compressed_file(inode)) {
2757 if (f2fs_is_compressed_cluster(inode, page->index)) {
2758 redirty_page_for_writepage(wbc, page);
2759 return AOP_WRITEPAGE_ACTIVATE;
2760 }
2761 }
2762out:
2763#endif
2764
2765 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
2766 wbc, FS_DATA_IO, 0);
f566bae8
JK		 2767}
2768
8f46dcae
CY		 2769/*
2770 * This function was copied from write_cche_pages from mm/page-writeback.c.
2771 * The major change is making write step of cold data page separately from
2772 * warm/hot data page.
2773 */
2774static int f2fs_write_cache_pages(struct address_space *mapping,
b0af6d49
CY		 2775 struct writeback_control *wbc,
2776 enum iostat_type io_type)
8f46dcae
CY		 2777{
2778 int ret = 0;
4c8ff709 2779 int done = 0, retry = 0;
8f46dcae 2780 struct pagevec pvec;
c29fd0c0 2781 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
8648de2c
CY		 2782 struct bio *bio = NULL;
2783 sector_t last_block;
4c8ff709
CY		 2784#ifdef CONFIG_F2FS_FS_COMPRESSION
2785 struct inode *inode = mapping->host;
2786 struct compress_ctx cc = {
2787 .inode = inode,
2788 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2789 .cluster_size = F2FS_I(inode)->i_cluster_size,
2790 .cluster_idx = NULL_CLUSTER,
2791 .rpages = NULL,
2792 .nr_rpages = 0,
2793 .cpages = NULL,
2794 .rbuf = NULL,
2795 .cbuf = NULL,
2796 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2797 .private = NULL,
2798 };
2799#endif
8f46dcae
CY		 2800 int nr_pages;
2801 pgoff_t uninitialized_var(writeback_index);
2802 pgoff_t index;
2803 pgoff_t end; /* Inclusive */
2804 pgoff_t done_index;
2805 int cycled;
2806 int range_whole = 0;
10bbd235 2807 xa_mark_t tag;
bab475c5 2808 int nwritten = 0;
4c8ff709
CY		 2809 int submitted = 0;
2810 int i;
8f46dcae 2811
86679820 2812 pagevec_init(&pvec);
46ae957f 2813
ef095d19
JK		 2814 if (get_dirty_pages(mapping->host) <=
2815 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2816 set_inode_flag(mapping->host, FI_HOT_DATA);
2817 else
2818 clear_inode_flag(mapping->host, FI_HOT_DATA);
2819
8f46dcae
CY		 2820 if (wbc->range_cyclic) {
2821 writeback_index = mapping->writeback_index; /* prev offset */
2822 index = writeback_index;
2823 if (index == 0)
2824 cycled = 1;
2825 else
2826 cycled = 0;
2827 end = -1;
2828 } else {
09cbfeaf
KS		 2829 index = wbc->range_start >> PAGE_SHIFT;
2830 end = wbc->range_end >> PAGE_SHIFT;
8f46dcae
CY		 2831 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2832 range_whole = 1;
2833 cycled = 1; /* ignore range_cyclic tests */
2834 }
2835 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2836 tag = PAGECACHE_TAG_TOWRITE;
2837 else
2838 tag = PAGECACHE_TAG_DIRTY;
2839retry:
4c8ff709 2840 retry = 0;
8f46dcae
CY		 2841 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2842 tag_pages_for_writeback(mapping, index, end);
2843 done_index = index;
4c8ff709 2844 while (!done && !retry && (index <= end)) {
69c4f35d 2845 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
67fd707f 2846 tag);
8f46dcae
CY		 2847 if (nr_pages == 0)
2848 break;
2849
2850 for (i = 0; i < nr_pages; i++) {
2851 struct page *page = pvec.pages[i];
4c8ff709
CY		 2852 bool need_readd;
2853readd:
2854 need_readd = false;
2855#ifdef CONFIG_F2FS_FS_COMPRESSION
2856 if (f2fs_compressed_file(inode)) {
2857 ret = f2fs_init_compress_ctx(&cc);
2858 if (ret) {
2859 done = 1;
2860 break;
2861 }
2862
2863 if (!f2fs_cluster_can_merge_page(&cc,
2864 page->index)) {
2865 ret = f2fs_write_multi_pages(&cc,
2866 &submitted, wbc, io_type);
2867 if (!ret)
2868 need_readd = true;
2869 goto result;
2870 }
8f46dcae 2871
4c8ff709
CY		 2872 if (unlikely(f2fs_cp_error(sbi)))
2873 goto lock_page;
2874
2875 if (f2fs_cluster_is_empty(&cc)) {
2876 void *fsdata = NULL;
2877 struct page *pagep;
2878 int ret2;
2879
2880 ret2 = f2fs_prepare_compress_overwrite(
2881 inode, &pagep,
2882 page->index, &fsdata);
2883 if (ret2 < 0) {
2884 ret = ret2;
2885 done = 1;
2886 break;
2887 } else if (ret2 &&
2888 !f2fs_compress_write_end(inode,
2889 fsdata, page->index,
2890 1)) {
2891 retry = 1;
2892 break;
2893 }
2894 } else {
2895 goto lock_page;
2896 }
2897 }
2898#endif
f8de4331 2899 /* give a priority to WB_SYNC threads */
c29fd0c0 2900 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
f8de4331
CY		 2901 wbc->sync_mode == WB_SYNC_NONE) {
2902 done = 1;
2903 break;
2904 }
4c8ff709
CY		 2905#ifdef CONFIG_F2FS_FS_COMPRESSION
2906lock_page:
2907#endif
8f46dcae 2908 done_index = page->index;
d29460e5 2909retry_write:
8f46dcae
CY		 2910 lock_page(page);
2911
2912 if (unlikely(page->mapping != mapping)) {
2913continue_unlock:
2914 unlock_page(page);
2915 continue;
2916 }
2917
2918 if (!PageDirty(page)) {
2919 /* someone wrote it for us */
2920 goto continue_unlock;
2921 }
2922
8f46dcae 2923 if (PageWriteback(page)) {
0b20fcec 2924 if (wbc->sync_mode != WB_SYNC_NONE)
fec1d657 2925 f2fs_wait_on_page_writeback(page,
bae0ee7a 2926 DATA, true, true);
0b20fcec 2927 else
8f46dcae
CY		 2928 goto continue_unlock;
2929 }
2930
8f46dcae
CY		 2931 if (!clear_page_dirty_for_io(page))
2932 goto continue_unlock;
2933
4c8ff709
CY		 2934#ifdef CONFIG_F2FS_FS_COMPRESSION
2935 if (f2fs_compressed_file(inode)) {
2936 get_page(page);
2937 f2fs_compress_ctx_add_page(&cc, page);
2938 continue;
2939 }
2940#endif
2941 ret = f2fs_write_single_data_page(page, &submitted,
2942 &bio, &last_block, wbc, io_type, 0);
2943 if (ret == AOP_WRITEPAGE_ACTIVATE)
2944 unlock_page(page);
2945#ifdef CONFIG_F2FS_FS_COMPRESSION
2946result:
2947#endif
2948 nwritten += submitted;
2949 wbc->nr_to_write -= submitted;
2950
8f46dcae 2951 if (unlikely(ret)) {
0002b61b
CY		 2952 /*
2953 * keep nr_to_write, since vfs uses this to
2954 * get # of written pages.
2955 */
2956 if (ret == AOP_WRITEPAGE_ACTIVATE) {
0002b61b 2957 ret = 0;
4c8ff709 2958 goto next;
d29460e5
JK		 2959 } else if (ret == -EAGAIN) {
2960 ret = 0;
2961 if (wbc->sync_mode == WB_SYNC_ALL) {
2962 cond_resched();
2963 congestion_wait(BLK_RW_ASYNC,
5df7731f 2964 DEFAULT_IO_TIMEOUT);
d29460e5
JK		 2965 goto retry_write;
2966 }
4c8ff709 2967 goto next;
0002b61b 2968 }
b230e6ca
JK		 2969 done_index = page->index + 1;
2970 done = 1;
2971 break;
8f46dcae
CY		 2972 }
2973
4c8ff709 2974 if (wbc->nr_to_write <= 0 &&
687de7f1 2975 wbc->sync_mode == WB_SYNC_NONE) {
8f46dcae
CY		 2976 done = 1;
2977 break;
2978 }
4c8ff709
CY		 2979next:
2980 if (need_readd)
2981 goto readd;
8f46dcae
CY		 2982 }
2983 pagevec_release(&pvec);
2984 cond_resched();
2985 }
4c8ff709
CY		 2986#ifdef CONFIG_F2FS_FS_COMPRESSION
2987 /* flush remained pages in compress cluster */
2988 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
2989 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
2990 nwritten += submitted;
2991 wbc->nr_to_write -= submitted;
2992 if (ret) {
2993 done = 1;
2994 retry = 0;
2995 }
2996 }
2997#endif
2998 if ((!cycled && !done) || retry) {
8f46dcae
CY		 2999 cycled = 1;
3000 index = 0;
3001 end = writeback_index - 1;
3002 goto retry;
3003 }
3004 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
3005 mapping->writeback_index = done_index;
3006
bab475c5 3007 if (nwritten)
b9109b0e 3008 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
bab475c5 3009 NULL, 0, DATA);
8648de2c
CY		 3010 /* submit cached bio of IPU write */
3011 if (bio)
0b20fcec 3012 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
6ca56ca4 3013
8f46dcae
CY		 3014 return ret;
3015}
3016
853137ce
JK		 3017static inline bool __should_serialize_io(struct inode *inode,
3018 struct writeback_control *wbc)
3019{
b13f67ff
CY		 3020 /* to avoid deadlock in path of data flush */
3021 if (F2FS_I(inode)->cp_task)
3022 return false;
3023
853137ce
JK		 3024 if (!S_ISREG(inode->i_mode))
3025 return false;
af033b2a
CY		 3026 if (IS_NOQUOTA(inode))
3027 return false;
b13f67ff
CY		 3028
3029 if (f2fs_compressed_file(inode))
3030 return true;
853137ce
JK		 3031 if (wbc->sync_mode != WB_SYNC_ALL)
3032 return true;
3033 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
3034 return true;
3035 return false;
3036}
3037
fc99fe27 3038static int __f2fs_write_data_pages(struct address_space *mapping,
b0af6d49
CY		 3039 struct writeback_control *wbc,
3040 enum iostat_type io_type)
eb47b800
JK		 3041{
3042 struct inode *inode = mapping->host;
4081363f 3043 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9dfa1baf 3044 struct blk_plug plug;
eb47b800 3045 int ret;
853137ce 3046 bool locked = false;
eb47b800 3047
cfb185a1 3048 /* deal with chardevs and other special file */
3049 if (!mapping->a_ops->writepage)
3050 return 0;
3051
6a290544
CY		 3052 /* skip writing if there is no dirty page in this inode */
3053 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3054 return 0;
3055
0771fcc7
CY		 3056 /* during POR, we don't need to trigger writepage at all. */
3057 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3058 goto skip_write;
3059
af033b2a
CY		 3060 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3061 wbc->sync_mode == WB_SYNC_NONE &&
a1257023 3062 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
4d57b86d 3063 f2fs_available_free_memory(sbi, DIRTY_DENTS))
a1257023
JK		 3064 goto skip_write;
3065
d323d005 3066 /* skip writing during file defragment */
91942321 3067 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
d323d005
CY		 3068 goto skip_write;
3069
d31c7c3f
YH		 3070 trace_f2fs_writepages(mapping->host, wbc, DATA);
3071
687de7f1
JK		 3072 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
3073 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0
CY		 3074 atomic_inc(&sbi->wb_sync_req[DATA]);
3075 else if (atomic_read(&sbi->wb_sync_req[DATA]))
687de7f1
JK		 3076 goto skip_write;
3077
853137ce
JK		 3078 if (__should_serialize_io(inode, wbc)) {
3079 mutex_lock(&sbi->writepages);
3080 locked = true;
3081 }
3082
9dfa1baf 3083 blk_start_plug(&plug);
b0af6d49 3084 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
9dfa1baf 3085 blk_finish_plug(&plug);
687de7f1 3086
853137ce
JK		 3087 if (locked)
3088 mutex_unlock(&sbi->writepages);
3089
687de7f1 3090 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0 3091 atomic_dec(&sbi->wb_sync_req[DATA]);
28ea6162
JK		 3092 /*
3093 * if some pages were truncated, we cannot guarantee its mapping->host
3094 * to detect pending bios.
3095 */
458e6197 3096
4d57b86d 3097 f2fs_remove_dirty_inode(inode);
eb47b800 3098 return ret;
d3baf95d
JK		 3099
3100skip_write:
a7ffdbe2 3101 wbc->pages_skipped += get_dirty_pages(inode);
d31c7c3f 3102 trace_f2fs_writepages(mapping->host, wbc, DATA);
d3baf95d 3103 return 0;
eb47b800
JK		 3104}
3105
b0af6d49
CY		 3106static int f2fs_write_data_pages(struct address_space *mapping,
3107 struct writeback_control *wbc)
3108{
3109 struct inode *inode = mapping->host;
3110
3111 return __f2fs_write_data_pages(mapping, wbc,
3112 F2FS_I(inode)->cp_task == current ?
3113 FS_CP_DATA_IO : FS_DATA_IO);
3114}
3115
3aab8f82
CY		 3116static void f2fs_write_failed(struct address_space *mapping, loff_t to)
3117{
3118 struct inode *inode = mapping->host;
819d9153 3119 loff_t i_size = i_size_read(inode);
3aab8f82 3120
3f188c23
JK		 3121 if (IS_NOQUOTA(inode))
3122 return;
3123
95ae251f
EB		 3124 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
3125 if (to > i_size && !f2fs_verity_in_progress(inode)) {
a33c1502 3126 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
6f8d4455 3127 down_write(&F2FS_I(inode)->i_mmap_sem);
a33c1502 3128
819d9153 3129 truncate_pagecache(inode, i_size);
3f188c23 3130 f2fs_truncate_blocks(inode, i_size, true);
a33c1502 3131
5a3a2d83 3132 up_write(&F2FS_I(inode)->i_mmap_sem);
6f8d4455 3133 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3aab8f82
CY		 3134 }
3135}
3136
2aadac08
JK		 3137static int prepare_write_begin(struct f2fs_sb_info *sbi,
3138 struct page *page, loff_t pos, unsigned len,
3139 block_t *blk_addr, bool *node_changed)
3140{
3141 struct inode *inode = page->mapping->host;
3142 pgoff_t index = page->index;
3143 struct dnode_of_data dn;
3144 struct page *ipage;
b4d07a3e 3145 bool locked = false;
e15882b6 3146 struct extent_info ei = {0,0,0};
2aadac08 3147 int err = 0;
2866fb16 3148 int flag;
2aadac08 3149
24b84912
JK		 3150 /*
3151 * we already allocated all the blocks, so we don't need to get
3152 * the block addresses when there is no need to fill the page.
3153 */
dc91de78 3154 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
95ae251f
EB		 3155 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
3156 !f2fs_verity_in_progress(inode))
24b84912
JK		 3157 return 0;
3158
2866fb16
SY		 3159 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
3160 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3161 flag = F2FS_GET_BLOCK_DEFAULT;
3162 else
3163 flag = F2FS_GET_BLOCK_PRE_AIO;
3164
b4d07a3e 3165 if (f2fs_has_inline_data(inode) ||
09cbfeaf 3166 (pos & PAGE_MASK) >= i_size_read(inode)) {
2866fb16 3167 __do_map_lock(sbi, flag, true);
b4d07a3e
JK		 3168 locked = true;
3169 }
4c8ff709 3170
b4d07a3e 3171restart:
2aadac08 3172 /* check inline_data */
4d57b86d 3173 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2aadac08
JK		 3174 if (IS_ERR(ipage)) {
3175 err = PTR_ERR(ipage);
3176 goto unlock_out;
3177 }
3178
3179 set_new_dnode(&dn, inode, ipage, ipage, 0);
3180
3181 if (f2fs_has_inline_data(inode)) {
f2470371 3182 if (pos + len <= MAX_INLINE_DATA(inode)) {
4d57b86d 3183 f2fs_do_read_inline_data(page, ipage);
91942321 3184 set_inode_flag(inode, FI_DATA_EXIST);
ab47036d
CY		 3185 if (inode->i_nlink)
3186 set_inline_node(ipage);
2aadac08
JK		 3187 } else {
3188 err = f2fs_convert_inline_page(&dn, page);
3189 if (err)
b4d07a3e
JK		 3190 goto out;
3191 if (dn.data_blkaddr == NULL_ADDR)
3192 err = f2fs_get_block(&dn, index);
3193 }
3194 } else if (locked) {
3195 err = f2fs_get_block(&dn, index);
3196 } else {
3197 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3198 dn.data_blkaddr = ei.blk + index - ei.fofs;
3199 } else {
b4d07a3e 3200 /* hole case */
4d57b86d 3201 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
4da7bf5a 3202 if (err || dn.data_blkaddr == NULL_ADDR) {
b4d07a3e 3203 f2fs_put_dnode(&dn);
59c9081b
YH		 3204 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
3205 true);
2866fb16 3206 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
b4d07a3e
JK		 3207 locked = true;
3208 goto restart;
3209 }
2aadac08
JK		 3210 }
3211 }
b4d07a3e 3212
2aadac08
JK		 3213 /* convert_inline_page can make node_changed */
3214 *blk_addr = dn.data_blkaddr;
3215 *node_changed = dn.node_changed;
b4d07a3e 3216out:
2aadac08
JK		 3217 f2fs_put_dnode(&dn);
3218unlock_out:
b4d07a3e 3219 if (locked)
2866fb16 3220 __do_map_lock(sbi, flag, false);
2aadac08
JK		 3221 return err;
3222}
3223
eb47b800
JK		 3224static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3225 loff_t pos, unsigned len, unsigned flags,
3226 struct page **pagep, void **fsdata)
3227{
3228 struct inode *inode = mapping->host;
4081363f 3229 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86531d6b 3230 struct page *page = NULL;
09cbfeaf 3231 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
a2e2e76b 3232 bool need_balance = false, drop_atomic = false;
2aadac08 3233 block_t blkaddr = NULL_ADDR;
eb47b800
JK		 3234 int err = 0;
3235
62aed044
CY		 3236 trace_f2fs_write_begin(inode, pos, len, flags);
3237
00e09c0b
CY		 3238 if (!f2fs_is_checkpoint_ready(sbi)) {
3239 err = -ENOSPC;
4354994f 3240 goto fail;
00e09c0b 3241 }
4354994f 3242
455e3a58
JK		 3243 if ((f2fs_is_atomic_file(inode) &&
3244 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3245 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
57864ae5 3246 err = -ENOMEM;
a2e2e76b 3247 drop_atomic = true;
57864ae5
JK		 3248 goto fail;
3249 }
3250
5f727395
JK		 3251 /*
3252 * We should check this at this moment to avoid deadlock on inode page
3253 * and #0 page. The locking rule for inline_data conversion should be:
3254 * lock_page(page #0) -> lock_page(inode_page)
3255 */
3256 if (index != 0) {
3257 err = f2fs_convert_inline_inode(inode);
3258 if (err)
3259 goto fail;
3260 }
4c8ff709
CY		 3261
3262#ifdef CONFIG_F2FS_FS_COMPRESSION
3263 if (f2fs_compressed_file(inode)) {
3264 int ret;
3265
3266 *fsdata = NULL;
3267
3268 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3269 index, fsdata);
3270 if (ret < 0) {
3271 err = ret;
3272 goto fail;
3273 } else if (ret) {
3274 return 0;
3275 }
3276 }
3277#endif
3278
afcb7ca0 3279repeat:
86d54795
JK		 3280 /*
3281 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
3282 * wait_for_stable_page. Will wait that below with our IO control.
3283 */
01eccef7 3284 page = f2fs_pagecache_get_page(mapping, index,
86d54795 3285 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3aab8f82
CY		 3286 if (!page) {
3287 err = -ENOMEM;
3288 goto fail;
3289 }
d5f66990 3290
4c8ff709
CY		 3291 /* TODO: cluster can be compressed due to race with .writepage */
3292
eb47b800
JK		 3293 *pagep = page;
3294
2aadac08
JK		 3295 err = prepare_write_begin(sbi, page, pos, len,
3296 &blkaddr, &need_balance);
9ba69cf9 3297 if (err)
2aadac08 3298 goto fail;
9ba69cf9 3299
af033b2a
CY		 3300 if (need_balance && !IS_NOQUOTA(inode) &&
3301 has_not_enough_free_secs(sbi, 0, 0)) {
2a340760 3302 unlock_page(page);
2c4db1a6 3303 f2fs_balance_fs(sbi, true);
2a340760
JK		 3304 lock_page(page);
3305 if (page->mapping != mapping) {
3306 /* The page got truncated from under us */
3307 f2fs_put_page(page, 1);
3308 goto repeat;
3309 }
3310 }
3311
bae0ee7a 3312 f2fs_wait_on_page_writeback(page, DATA, false, true);
b3d208f9 3313
649d7df2
JK		 3314 if (len == PAGE_SIZE || PageUptodate(page))
3315 return 0;
eb47b800 3316
95ae251f
EB		 3317 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3318 !f2fs_verity_in_progress(inode)) {
746e2403
YH		 3319 zero_user_segment(page, len, PAGE_SIZE);
3320 return 0;
3321 }
3322
2aadac08 3323 if (blkaddr == NEW_ADDR) {
09cbfeaf 3324 zero_user_segment(page, 0, PAGE_SIZE);
649d7df2 3325 SetPageUptodate(page);
eb47b800 3326 } else {
93770ab7
CY		 3327 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3328 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 3329 err = -EFSCORRUPTED;
93770ab7
CY		 3330 goto fail;
3331 }
0683728a 3332 err = f2fs_submit_page_read(inode, page, blkaddr, true);
13ba41e3 3333 if (err)
78682f79 3334 goto fail;
d54c795b 3335
393ff91f 3336 lock_page(page);
6bacf52f 3337 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 3338 f2fs_put_page(page, 1);
3339 goto repeat;
eb47b800 3340 }
1563ac75
CY		 3341 if (unlikely(!PageUptodate(page))) {
3342 err = -EIO;
3343 goto fail;
4375a336 3344 }
eb47b800 3345 }
eb47b800 3346 return 0;
9ba69cf9 3347
3aab8f82 3348fail:
86531d6b 3349 f2fs_put_page(page, 1);
3aab8f82 3350 f2fs_write_failed(mapping, pos + len);
a2e2e76b 3351 if (drop_atomic)
4d57b86d 3352 f2fs_drop_inmem_pages_all(sbi, false);
3aab8f82 3353 return err;
eb47b800
JK		 3354}
3355
a1dd3c13
JK		 3356static int f2fs_write_end(struct file *file,
3357 struct address_space *mapping,
3358 loff_t pos, unsigned len, unsigned copied,
3359 struct page *page, void *fsdata)
3360{
3361 struct inode *inode = page->mapping->host;
3362
dfb2bf38
CY		 3363 trace_f2fs_write_end(inode, pos, len, copied);
3364
649d7df2
JK		 3365 /*
3366 * This should be come from len == PAGE_SIZE, and we expect copied
3367 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
3368 * let generic_perform_write() try to copy data again through copied=0.
3369 */
3370 if (!PageUptodate(page)) {
746e2403 3371 if (unlikely(copied != len))
649d7df2
JK		 3372 copied = 0;
3373 else
3374 SetPageUptodate(page);
3375 }
4c8ff709
CY		 3376
3377#ifdef CONFIG_F2FS_FS_COMPRESSION
3378 /* overwrite compressed file */
3379 if (f2fs_compressed_file(inode) && fsdata) {
3380 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3381 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3382 return copied;
3383 }
3384#endif
3385
649d7df2
JK		 3386 if (!copied)
3387 goto unlock_out;
3388
34ba94ba 3389 set_page_dirty(page);
a1dd3c13 3390
95ae251f
EB		 3391 if (pos + copied > i_size_read(inode) &&
3392 !f2fs_verity_in_progress(inode))
fc9581c8 3393 f2fs_i_size_write(inode, pos + copied);
649d7df2 3394unlock_out:
3024c9a1 3395 f2fs_put_page(page, 1);
d0239e1b 3396 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
a1dd3c13
JK		 3397 return copied;
3398}
3399
6f673763
OS		 3400static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
3401 loff_t offset)
944fcfc1 3402{
8a56dd96
JK		 3403 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
3404 unsigned blkbits = i_blkbits;
3405 unsigned blocksize_mask = (1 << blkbits) - 1;
3406 unsigned long align = offset | iov_iter_alignment(iter);
3407 struct block_device *bdev = inode->i_sb->s_bdev;
3408
3409 if (align & blocksize_mask) {
3410 if (bdev)
3411 blkbits = blksize_bits(bdev_logical_block_size(bdev));
3412 blocksize_mask = (1 << blkbits) - 1;
3413 if (align & blocksize_mask)
3414 return -EINVAL;
3415 return 1;
3416 }
944fcfc1
JK		 3417 return 0;
3418}
3419
02b16d0a
CY		 3420static void f2fs_dio_end_io(struct bio *bio)
3421{
3422 struct f2fs_private_dio *dio = bio->bi_private;
3423
3424 dec_page_count(F2FS_I_SB(dio->inode),
3425 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3426
3427 bio->bi_private = dio->orig_private;
3428 bio->bi_end_io = dio->orig_end_io;
3429
5222595d 3430 kvfree(dio);
02b16d0a
CY		 3431
3432 bio_endio(bio);
3433}
3434
3435static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
3436 loff_t file_offset)
3437{
3438 struct f2fs_private_dio *dio;
3439 bool write = (bio_op(bio) == REQ_OP_WRITE);
02b16d0a
CY		 3440
3441 dio = f2fs_kzalloc(F2FS_I_SB(inode),
3442 sizeof(struct f2fs_private_dio), GFP_NOFS);
8e114038 3443 if (!dio)
02b16d0a 3444 goto out;
02b16d0a
CY		 3445
3446 dio->inode = inode;
3447 dio->orig_end_io = bio->bi_end_io;
3448 dio->orig_private = bio->bi_private;
3449 dio->write = write;
3450
3451 bio->bi_end_io = f2fs_dio_end_io;
3452 bio->bi_private = dio;
3453
3454 inc_page_count(F2FS_I_SB(inode),
3455 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3456
3457 submit_bio(bio);
3458 return;
3459out:
3460 bio->bi_status = BLK_STS_IOERR;
3461 bio_endio(bio);
3462}
3463
c8b8e32d 3464static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
eb47b800 3465{
b439b103 3466 struct address_space *mapping = iocb->ki_filp->f_mapping;
3aab8f82 3467 struct inode *inode = mapping->host;
0cdd3195 3468 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f847c699 3469 struct f2fs_inode_info *fi = F2FS_I(inode);
3aab8f82 3470 size_t count = iov_iter_count(iter);
c8b8e32d 3471 loff_t offset = iocb->ki_pos;
82e0a5aa 3472 int rw = iov_iter_rw(iter);
3aab8f82 3473 int err;
0cdd3195 3474 enum rw_hint hint = iocb->ki_hint;
63189b78 3475 int whint_mode = F2FS_OPTION(sbi).whint_mode;
f847c699 3476 bool do_opu;
944fcfc1 3477
b439b103 3478 err = check_direct_IO(inode, iter, offset);
b9d777b8 3479 if (err)
8a56dd96 3480 return err < 0 ? err : 0;
9ffe0fb5 3481
f847c699 3482 if (f2fs_force_buffered_io(inode, iocb, iter))
36abef4e 3483 return 0;
fcc85a4d 3484
f847c699
CY		 3485 do_opu = allow_outplace_dio(inode, iocb, iter);
3486
5302fb00 3487 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
70407fad 3488
0cdd3195
HL		 3489 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
3490 iocb->ki_hint = WRITE_LIFE_NOT_SET;
3491
f847c699
CY		 3492 if (iocb->ki_flags & IOCB_NOWAIT) {
3493 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
3494 iocb->ki_hint = hint;
3495 err = -EAGAIN;
3496 goto out;
3497 }
3498 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
3499 up_read(&fi->i_gc_rwsem[rw]);
b91050a8
HL		 3500 iocb->ki_hint = hint;
3501 err = -EAGAIN;
3502 goto out;
3503 }
f847c699
CY		 3504 } else {
3505 down_read(&fi->i_gc_rwsem[rw]);
3506 if (do_opu)
3507 down_read(&fi->i_gc_rwsem[READ]);
b91050a8
HL		 3508 }
3509
02b16d0a 3510 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
f9d6d059
CY		 3511 iter, rw == WRITE ? get_data_block_dio_write :
3512 get_data_block_dio, NULL, f2fs_dio_submit_bio,
ad8d6a02
D		 3513 rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
3514 DIO_SKIP_HOLES);
f847c699
CY		 3515
3516 if (do_opu)
3517 up_read(&fi->i_gc_rwsem[READ]);
3518
3519 up_read(&fi->i_gc_rwsem[rw]);
82e0a5aa
CY		 3520
3521 if (rw == WRITE) {
0cdd3195
HL		 3522 if (whint_mode == WHINT_MODE_OFF)
3523 iocb->ki_hint = hint;
b0af6d49
CY		 3524 if (err > 0) {
3525 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3526 err);
f847c699
CY		 3527 if (!do_opu)
3528 set_inode_flag(inode, FI_UPDATE_WRITE);
b0af6d49 3529 } else if (err < 0) {
6bfc4919 3530 f2fs_write_failed(mapping, offset + count);
b0af6d49 3531 }
8b83ac81
CY		 3532 } else {
3533 if (err > 0)
3534 f2fs_update_iostat(sbi, APP_DIRECT_READ_IO, err);
6bfc4919 3535 }
70407fad 3536
b91050a8 3537out:
5302fb00 3538 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
70407fad 3539
3aab8f82 3540 return err;
eb47b800
JK		 3541}
3542
487261f3
CY		 3543void f2fs_invalidate_page(struct page *page, unsigned int offset,
3544 unsigned int length)
eb47b800
JK		 3545{
3546 struct inode *inode = page->mapping->host;
487261f3 3547 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
a7ffdbe2 3548
487261f3 3549 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
09cbfeaf 3550 (offset % PAGE_SIZE || length != PAGE_SIZE))
a7ffdbe2
JK		 3551 return;
3552
487261f3 3553 if (PageDirty(page)) {
933439c8 3554 if (inode->i_ino == F2FS_META_INO(sbi)) {
487261f3 3555 dec_page_count(sbi, F2FS_DIRTY_META);
933439c8 3556 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
487261f3 3557 dec_page_count(sbi, F2FS_DIRTY_NODES);
933439c8 3558 } else {
487261f3 3559 inode_dec_dirty_pages(inode);
4d57b86d 3560 f2fs_remove_dirty_inode(inode);
933439c8 3561 }
487261f3 3562 }
decd36b6 3563
2baf0781
CY		 3564 clear_cold_data(page);
3565
decd36b6 3566 if (IS_ATOMIC_WRITTEN_PAGE(page))
4d57b86d 3567 return f2fs_drop_inmem_page(inode, page);
decd36b6 3568
240a5915 3569 f2fs_clear_page_private(page);
eb47b800
JK		 3570}
3571
487261f3 3572int f2fs_release_page(struct page *page, gfp_t wait)
eb47b800 3573{
f68daeeb
JK		 3574 /* If this is dirty page, keep PagePrivate */
3575 if (PageDirty(page))
3576 return 0;
3577
decd36b6
CY		 3578 /* This is atomic written page, keep Private */
3579 if (IS_ATOMIC_WRITTEN_PAGE(page))
3580 return 0;
3581
2baf0781 3582 clear_cold_data(page);
240a5915 3583 f2fs_clear_page_private(page);
c3850aa1 3584 return 1;
eb47b800
JK		 3585}
3586
3587static int f2fs_set_data_page_dirty(struct page *page)
3588{
4969c06a 3589 struct inode *inode = page_file_mapping(page)->host;
eb47b800 3590
26c6b887
JK		 3591 trace_f2fs_set_page_dirty(page, DATA);
3592
237c0790
JK		 3593 if (!PageUptodate(page))
3594 SetPageUptodate(page);
4969c06a
JK		 3595 if (PageSwapCache(page))
3596 return __set_page_dirty_nobuffers(page);
34ba94ba 3597
5fe45743 3598 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
decd36b6 3599 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
4d57b86d 3600 f2fs_register_inmem_page(inode, page);
decd36b6
CY		 3601 return 1;
3602 }
3603 /*
3604 * Previously, this page has been registered, we just
3605 * return here.
3606 */
3607 return 0;
34ba94ba
JK		 3608 }
3609
eb47b800 3610 if (!PageDirty(page)) {
b87078ad 3611 __set_page_dirty_nobuffers(page);
4d57b86d 3612 f2fs_update_dirty_page(inode, page);
eb47b800
JK		 3613 return 1;
3614 }
3615 return 0;
3616}
3617
c01e54b7
JK		 3618static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3619{
454ae7e5
CY		 3620 struct inode *inode = mapping->host;
3621
1d373a0e
JK		 3622 if (f2fs_has_inline_data(inode))
3623 return 0;
3624
3625 /* make sure allocating whole blocks */
3626 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3627 filemap_write_and_wait(mapping);
3628
e2b4e2bc 3629 return generic_block_bmap(mapping, block, get_data_block_bmap);
429511cd
CY		 3630}
3631
5b7a487c
WG		 3632#ifdef CONFIG_MIGRATION
3633#include <linux/migrate.h>
3634
3635int f2fs_migrate_page(struct address_space *mapping,
3636 struct page *newpage, struct page *page, enum migrate_mode mode)
3637{
3638 int rc, extra_count;
3639 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3640 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
3641
3642 BUG_ON(PageWriteback(page));
3643
3644 /* migrating an atomic written page is safe with the inmem_lock hold */
ff1048e7
JK		 3645 if (atomic_written) {
3646 if (mode != MIGRATE_SYNC)
3647 return -EBUSY;
3648 if (!mutex_trylock(&fi->inmem_lock))
3649 return -EAGAIN;
3650 }
5b7a487c 3651
240a5915
CY		 3652 /* one extra reference was held for atomic_write page */
3653 extra_count = atomic_written ? 1 : 0;
5b7a487c 3654 rc = migrate_page_move_mapping(mapping, newpage,
37109694 3655 page, extra_count);
5b7a487c
WG		 3656 if (rc != MIGRATEPAGE_SUCCESS) {
3657 if (atomic_written)
3658 mutex_unlock(&fi->inmem_lock);
3659 return rc;
3660 }
3661
3662 if (atomic_written) {
3663 struct inmem_pages *cur;
3664 list_for_each_entry(cur, &fi->inmem_pages, list)
3665 if (cur->page == page) {
3666 cur->page = newpage;
3667 break;
3668 }
3669 mutex_unlock(&fi->inmem_lock);
3670 put_page(page);
3671 get_page(newpage);
3672 }
3673
240a5915
CY		 3674 if (PagePrivate(page)) {
3675 f2fs_set_page_private(newpage, page_private(page));
3676 f2fs_clear_page_private(page);
3677 }
5b7a487c 3678
2916ecc0
JG		 3679 if (mode != MIGRATE_SYNC_NO_COPY)
3680 migrate_page_copy(newpage, page);
3681 else
3682 migrate_page_states(newpage, page);
5b7a487c
WG		 3683
3684 return MIGRATEPAGE_SUCCESS;
3685}
3686#endif
3687
4969c06a
JK		 3688#ifdef CONFIG_SWAP
3689/* Copied from generic_swapfile_activate() to check any holes */
3e5e479a
CY		 3690static int check_swap_activate(struct swap_info_struct *sis,
3691 struct file *swap_file, sector_t *span)
4969c06a
JK		 3692{
3693 struct address_space *mapping = swap_file->f_mapping;
3694 struct inode *inode = mapping->host;
3695 unsigned blocks_per_page;
3696 unsigned long page_no;
3697 unsigned blkbits;
3698 sector_t probe_block;
3699 sector_t last_block;
3700 sector_t lowest_block = -1;
3701 sector_t highest_block = 0;
3e5e479a
CY		 3702 int nr_extents = 0;
3703 int ret;
4969c06a
JK		 3704
3705 blkbits = inode->i_blkbits;
3706 blocks_per_page = PAGE_SIZE >> blkbits;
3707
3708 /*
3709 * Map all the blocks into the extent list. This code doesn't try
3710 * to be very smart.
3711 */
3712 probe_block = 0;
3713 page_no = 0;
3714 last_block = i_size_read(inode) >> blkbits;
3e5e479a
CY		 3715 while ((probe_block + blocks_per_page) <= last_block &&
3716 page_no < sis->max) {
4969c06a
JK		 3717 unsigned block_in_page;
3718 sector_t first_block;
30460e1e
CM		 3719 sector_t block = 0;
3720 int err = 0;
4969c06a
JK		 3721
3722 cond_resched();
3723
30460e1e
CM		 3724 block = probe_block;
3725 err = bmap(inode, &block);
3726 if (err || !block)
4969c06a 3727 goto bad_bmap;
30460e1e 3728 first_block = block;
4969c06a
JK		 3729
3730 /*
3731 * It must be PAGE_SIZE aligned on-disk
3732 */
3733 if (first_block & (blocks_per_page - 1)) {
3734 probe_block++;
3735 goto reprobe;
3736 }
3737
3738 for (block_in_page = 1; block_in_page < blocks_per_page;
3739 block_in_page++) {
4969c06a 3740
30460e1e
CM		 3741 block = probe_block + block_in_page;
3742 err = bmap(inode, &block);
3743
3744 if (err || !block)
4969c06a 3745 goto bad_bmap;
30460e1e 3746
4969c06a
JK		 3747 if (block != first_block + block_in_page) {
3748 /* Discontiguity */
3749 probe_block++;
3750 goto reprobe;
3751 }
3752 }
3753
3754 first_block >>= (PAGE_SHIFT - blkbits);
3755 if (page_no) { /* exclude the header page */
3756 if (first_block < lowest_block)
3757 lowest_block = first_block;
3758 if (first_block > highest_block)
3759 highest_block = first_block;
3760 }
3761
3e5e479a
CY		 3762 /*
3763 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3764 */
3765 ret = add_swap_extent(sis, page_no, 1, first_block);
3766 if (ret < 0)
3767 goto out;
3768 nr_extents += ret;
4969c06a
JK		 3769 page_no++;
3770 probe_block += blocks_per_page;
3771reprobe:
3772 continue;
3773 }
3e5e479a
CY		 3774 ret = nr_extents;
3775 *span = 1 + highest_block - lowest_block;
3776 if (page_no == 0)
3777 page_no = 1; /* force Empty message */
3778 sis->max = page_no;
3779 sis->pages = page_no - 1;
3780 sis->highest_bit = page_no - 1;
3781out:
3782 return ret;
4969c06a
JK		 3783bad_bmap:
3784 pr_err("swapon: swapfile has holes\n");
3785 return -EINVAL;
3786}
3787
3788static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3789 sector_t *span)
3790{
3791 struct inode *inode = file_inode(file);
3792 int ret;
3793
3794 if (!S_ISREG(inode->i_mode))
3795 return -EINVAL;
3796
3797 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3798 return -EROFS;
3799
3800 ret = f2fs_convert_inline_inode(inode);
3801 if (ret)
3802 return ret;
3803
4c8ff709
CY		 3804 if (f2fs_disable_compressed_file(inode))
3805 return -EINVAL;
3806
3e5e479a
CY		 3807 ret = check_swap_activate(sis, file, span);
3808 if (ret < 0)
4969c06a
JK		 3809 return ret;
3810
3811 set_inode_flag(inode, FI_PIN_FILE);
3812 f2fs_precache_extents(inode);
3813 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3e5e479a 3814 return ret;
4969c06a
JK		 3815}
3816
3817static void f2fs_swap_deactivate(struct file *file)
3818{
3819 struct inode *inode = file_inode(file);
3820
3821 clear_inode_flag(inode, FI_PIN_FILE);
3822}
3823#else
3824static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3825 sector_t *span)
3826{
3827 return -EOPNOTSUPP;
3828}
3829
3830static void f2fs_swap_deactivate(struct file *file)
3831{
3832}
3833#endif
3834
eb47b800
JK		 3835const struct address_space_operations f2fs_dblock_aops = {
3836 .readpage = f2fs_read_data_page,
3837 .readpages = f2fs_read_data_pages,
3838 .writepage = f2fs_write_data_page,
3839 .writepages = f2fs_write_data_pages,
3840 .write_begin = f2fs_write_begin,
a1dd3c13 3841 .write_end = f2fs_write_end,
eb47b800 3842 .set_page_dirty = f2fs_set_data_page_dirty,
487261f3
CY		 3843 .invalidatepage = f2fs_invalidate_page,
3844 .releasepage = f2fs_release_page,
eb47b800 3845 .direct_IO = f2fs_direct_IO,
c01e54b7 3846 .bmap = f2fs_bmap,
4969c06a
JK		 3847 .swap_activate = f2fs_swap_activate,
3848 .swap_deactivate = f2fs_swap_deactivate,
5b7a487c
WG		 3849#ifdef CONFIG_MIGRATION
3850 .migratepage = f2fs_migrate_page,
3851#endif
eb47b800 3852};
6dbb1796 3853
5ec2d99d 3854void f2fs_clear_page_cache_dirty_tag(struct page *page)
aec2f729
CY		 3855{
3856 struct address_space *mapping = page_mapping(page);
3857 unsigned long flags;
3858
3859 xa_lock_irqsave(&mapping->i_pages, flags);
5ec2d99d 3860 __xa_clear_mark(&mapping->i_pages, page_index(page),
aec2f729
CY		 3861 PAGECACHE_TAG_DIRTY);
3862 xa_unlock_irqrestore(&mapping->i_pages, flags);
3863}
3864
6dbb1796
EB		 3865int __init f2fs_init_post_read_processing(void)
3866{
95ae251f
EB		 3867 bio_post_read_ctx_cache =
3868 kmem_cache_create("f2fs_bio_post_read_ctx",
3869 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
6dbb1796
EB		 3870 if (!bio_post_read_ctx_cache)
3871 goto fail;
3872 bio_post_read_ctx_pool =
3873 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3874 bio_post_read_ctx_cache);
3875 if (!bio_post_read_ctx_pool)
3876 goto fail_free_cache;
3877 return 0;
3878
3879fail_free_cache:
3880 kmem_cache_destroy(bio_post_read_ctx_cache);
3881fail:
3882 return -ENOMEM;
3883}
3884
0b20fcec 3885void f2fs_destroy_post_read_processing(void)
6dbb1796
EB		 3886{
3887 mempool_destroy(bio_post_read_ctx_pool);
3888 kmem_cache_destroy(bio_post_read_ctx_cache);
3889}
0b20fcec 3890
4c8ff709
CY		 3891int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
3892{
3893 if (!f2fs_sb_has_encrypt(sbi) &&
3894 !f2fs_sb_has_verity(sbi) &&
3895 !f2fs_sb_has_compression(sbi))
3896 return 0;
3897
3898 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
3899 WQ_UNBOUND | WQ_HIGHPRI,
3900 num_online_cpus());
3901 if (!sbi->post_read_wq)
3902 return -ENOMEM;
3903 return 0;
3904}
3905
3906void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
3907{
3908 if (sbi->post_read_wq)
3909 destroy_workqueue(sbi->post_read_wq);
3910}
3911
0b20fcec
CY		 3912int __init f2fs_init_bio_entry_cache(void)
3913{
98510003 3914 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
0b20fcec
CY		 3915 sizeof(struct bio_entry));
3916 if (!bio_entry_slab)
3917 return -ENOMEM;
3918 return 0;
3919}
3920
f543805f 3921void f2fs_destroy_bio_entry_cache(void)
0b20fcec
CY		 3922{
3923 kmem_cache_destroy(bio_entry_slab);
3924}
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