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f2fs: support fiemap on compressed inode
[people/ms/linux.git] / fs / f2fs / data.c
CommitLineData
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
bf38fbad
CY		 1835static loff_t max_inode_blocks(struct inode *inode)
1836{
1837 loff_t result = ADDRS_PER_INODE(inode);
1838 loff_t leaf_count = ADDRS_PER_BLOCK(inode);
1839
1840 /* two direct node blocks */
1841 result += (leaf_count * 2);
1842
1843 /* two indirect node blocks */
1844 leaf_count *= NIDS_PER_BLOCK;
1845 result += (leaf_count * 2);
1846
1847 /* one double indirect node block */
1848 leaf_count *= NIDS_PER_BLOCK;
1849 result += leaf_count;
1850
1851 return result;
1852}
1853
9ab70134
JK		 1854int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1855 u64 start, u64 len)
1856{
7f63eb77
JK		 1857 struct buffer_head map_bh;
1858 sector_t start_blk, last_blk;
da85985c 1859 pgoff_t next_pgofs;
7f63eb77
JK		 1860 u64 logical = 0, phys = 0, size = 0;
1861 u32 flags = 0;
7f63eb77 1862 int ret = 0;
bf38fbad
CY		 1863 bool compr_cluster = false;
1864 unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
7f63eb77 1865
c4020b2d
CY		 1866 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1867 ret = f2fs_precache_extents(inode);
1868 if (ret)
1869 return ret;
1870 }
1871
442a9dbd 1872 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
7f63eb77
JK		 1873 if (ret)
1874 return ret;
1875
f1b43d4c
CY		 1876 inode_lock(inode);
1877
442a9dbd
CY		 1878 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1879 ret = f2fs_xattr_fiemap(inode, fieinfo);
1880 goto out;
1881 }
1882
7975f349 1883 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
67f8cf3c
JK		 1884 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1885 if (ret != -EAGAIN)
f1b43d4c 1886 goto out;
67f8cf3c
JK		 1887 }
1888
7f63eb77
JK		 1889 if (logical_to_blk(inode, len) == 0)
1890 len = blk_to_logical(inode, 1);
1891
1892 start_blk = logical_to_blk(inode, start);
1893 last_blk = logical_to_blk(inode, start + len - 1);
9a950d52 1894
7f63eb77
JK		 1895next:
1896 memset(&map_bh, 0, sizeof(struct buffer_head));
1897 map_bh.b_size = len;
1898
bf38fbad
CY		 1899 if (compr_cluster)
1900 map_bh.b_size = blk_to_logical(inode, cluster_size - 1);
1901
e2b4e2bc 1902 ret = get_data_block(inode, start_blk, &map_bh, 0,
da85985c 1903 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
7f63eb77
JK		 1904 if (ret)
1905 goto out;
1906
1907 /* HOLE */
1908 if (!buffer_mapped(&map_bh)) {
da85985c 1909 start_blk = next_pgofs;
58736fa6
CY		 1910
1911 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
bf38fbad 1912 max_inode_blocks(inode)))
9a950d52 1913 goto prep_next;
58736fa6 1914
9a950d52
FL		 1915 flags |= FIEMAP_EXTENT_LAST;
1916 }
7f63eb77 1917
da5af127 1918 if (size) {
62230e0d 1919 if (IS_ENCRYPTED(inode))
da5af127
CY		 1920 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1921
9a950d52
FL		 1922 ret = fiemap_fill_next_extent(fieinfo, logical,
1923 phys, size, flags);
bf38fbad
CY		 1924 if (ret)
1925 goto out;
1926 size = 0;
da5af127 1927 }
7f63eb77 1928
bf38fbad 1929 if (start_blk > last_blk)
9a950d52 1930 goto out;
7f63eb77 1931
bf38fbad
CY		 1932 if (compr_cluster) {
1933 compr_cluster = false;
1934
1935
1936 logical = blk_to_logical(inode, start_blk - 1);
1937 phys = blk_to_logical(inode, map_bh.b_blocknr);
1938 size = blk_to_logical(inode, cluster_size);
1939
1940 flags |= FIEMAP_EXTENT_ENCODED;
1941
1942 start_blk += cluster_size - 1;
1943
1944 if (start_blk > last_blk)
1945 goto out;
1946
1947 goto prep_next;
1948 }
1949
1950 if (map_bh.b_blocknr == COMPRESS_ADDR) {
1951 compr_cluster = true;
1952 start_blk++;
1953 goto prep_next;
1954 }
1955
9a950d52
FL		 1956 logical = blk_to_logical(inode, start_blk);
1957 phys = blk_to_logical(inode, map_bh.b_blocknr);
1958 size = map_bh.b_size;
1959 flags = 0;
1960 if (buffer_unwritten(&map_bh))
1961 flags = FIEMAP_EXTENT_UNWRITTEN;
7f63eb77 1962
9a950d52 1963 start_blk += logical_to_blk(inode, size);
7f63eb77 1964
9a950d52 1965prep_next:
7f63eb77
JK		 1966 cond_resched();
1967 if (fatal_signal_pending(current))
1968 ret = -EINTR;
1969 else
1970 goto next;
1971out:
1972 if (ret == 1)
1973 ret = 0;
1974
5955102c 1975 inode_unlock(inode);
7f63eb77 1976 return ret;
9ab70134
JK		 1977}
1978
95ae251f
EB		 1979static inline loff_t f2fs_readpage_limit(struct inode *inode)
1980{
1981 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1982 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1983 return inode->i_sb->s_maxbytes;
1984
1985 return i_size_read(inode);
1986}
1987
2df0ab04
CY		 1988static int f2fs_read_single_page(struct inode *inode, struct page *page,
1989 unsigned nr_pages,
1990 struct f2fs_map_blocks *map,
1991 struct bio **bio_ret,
1992 sector_t *last_block_in_bio,
1993 bool is_readahead)
1994{
1995 struct bio *bio = *bio_ret;
1996 const unsigned blkbits = inode->i_blkbits;
1997 const unsigned blocksize = 1 << blkbits;
1998 sector_t block_in_file;
1999 sector_t last_block;
2000 sector_t last_block_in_file;
2001 sector_t block_nr;
2002 int ret = 0;
2003
4969c06a 2004 block_in_file = (sector_t)page_index(page);
2df0ab04 2005 last_block = block_in_file + nr_pages;
95ae251f 2006 last_block_in_file = (f2fs_readpage_limit(inode) + blocksize - 1) >>
2df0ab04
CY		 2007 blkbits;
2008 if (last_block > last_block_in_file)
2009 last_block = last_block_in_file;
2010
2011 /* just zeroing out page which is beyond EOF */
2012 if (block_in_file >= last_block)
2013 goto zero_out;
2014 /*
2015 * Map blocks using the previous result first.
2016 */
2017 if ((map->m_flags & F2FS_MAP_MAPPED) &&
2018 block_in_file > map->m_lblk &&
2019 block_in_file < (map->m_lblk + map->m_len))
2020 goto got_it;
2021
2022 /*
2023 * Then do more f2fs_map_blocks() calls until we are
2024 * done with this page.
2025 */
2026 map->m_lblk = block_in_file;
2027 map->m_len = last_block - block_in_file;
2028
2029 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
2030 if (ret)
2031 goto out;
2032got_it:
2033 if ((map->m_flags & F2FS_MAP_MAPPED)) {
2034 block_nr = map->m_pblk + block_in_file - map->m_lblk;
2035 SetPageMappedToDisk(page);
2036
4969c06a
JK		 2037 if (!PageUptodate(page) && (!PageSwapCache(page) &&
2038 !cleancache_get_page(page))) {
2df0ab04
CY		 2039 SetPageUptodate(page);
2040 goto confused;
2041 }
2042
2043 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
93770ab7 2044 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 2045 ret = -EFSCORRUPTED;
2df0ab04
CY		 2046 goto out;
2047 }
2048 } else {
2049zero_out:
2050 zero_user_segment(page, 0, PAGE_SIZE);
95ae251f
EB		 2051 if (f2fs_need_verity(inode, page->index) &&
2052 !fsverity_verify_page(page)) {
2053 ret = -EIO;
2054 goto out;
2055 }
2df0ab04
CY		 2056 if (!PageUptodate(page))
2057 SetPageUptodate(page);
2058 unlock_page(page);
2059 goto out;
2060 }
2061
2062 /*
2063 * This page will go to BIO. Do we need to send this
2064 * BIO off first?
2065 */
8896cbdf
CY		 2066 if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
2067 *last_block_in_bio, block_nr)) {
2df0ab04
CY		 2068submit_and_realloc:
2069 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2070 bio = NULL;
2071 }
2072 if (bio == NULL) {
2073 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
0683728a
CY		 2074 is_readahead ? REQ_RAHEAD : 0, page->index,
2075 false);
2df0ab04
CY		 2076 if (IS_ERR(bio)) {
2077 ret = PTR_ERR(bio);
2078 bio = NULL;
2079 goto out;
2080 }
2081 }
2082
2083 /*
2084 * If the page is under writeback, we need to wait for
2085 * its completion to see the correct decrypted data.
2086 */
2087 f2fs_wait_on_block_writeback(inode, block_nr);
2088
2089 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2090 goto submit_and_realloc;
2091
2092 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
8b83ac81 2093 f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
2df0ab04
CY		 2094 ClearPageError(page);
2095 *last_block_in_bio = block_nr;
2096 goto out;
2097confused:
2098 if (bio) {
2099 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2100 bio = NULL;
2101 }
2102 unlock_page(page);
2103out:
2104 *bio_ret = bio;
2105 return ret;
2106}
2107
4c8ff709
CY		 2108#ifdef CONFIG_F2FS_FS_COMPRESSION
2109int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2110 unsigned nr_pages, sector_t *last_block_in_bio,
0683728a 2111 bool is_readahead, bool for_write)
4c8ff709
CY		 2112{
2113 struct dnode_of_data dn;
2114 struct inode *inode = cc->inode;
2115 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2116 struct bio *bio = *bio_ret;
2117 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2118 sector_t last_block_in_file;
2119 const unsigned blkbits = inode->i_blkbits;
2120 const unsigned blocksize = 1 << blkbits;
2121 struct decompress_io_ctx *dic = NULL;
2122 int i;
2123 int ret = 0;
2124
2125 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2126
7496affa
CY		 2127 last_block_in_file = (f2fs_readpage_limit(inode) +
2128 blocksize - 1) >> blkbits;
4c8ff709
CY		 2129
2130 /* get rid of pages beyond EOF */
2131 for (i = 0; i < cc->cluster_size; i++) {
2132 struct page *page = cc->rpages[i];
2133
2134 if (!page)
2135 continue;
2136 if ((sector_t)page->index >= last_block_in_file) {
2137 zero_user_segment(page, 0, PAGE_SIZE);
2138 if (!PageUptodate(page))
2139 SetPageUptodate(page);
2140 } else if (!PageUptodate(page)) {
2141 continue;
2142 }
2143 unlock_page(page);
2144 cc->rpages[i] = NULL;
2145 cc->nr_rpages--;
2146 }
2147
2148 /* we are done since all pages are beyond EOF */
2149 if (f2fs_cluster_is_empty(cc))
2150 goto out;
2151
2152 set_new_dnode(&dn, inode, NULL, NULL, 0);
2153 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2154 if (ret)
2155 goto out;
2156
2157 /* cluster was overwritten as normal cluster */
2158 if (dn.data_blkaddr != COMPRESS_ADDR)
2159 goto out;
2160
2161 for (i = 1; i < cc->cluster_size; i++) {
2162 block_t blkaddr;
2163
a2ced1ce 2164 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2165 dn.ofs_in_node + i);
2166
2167 if (!__is_valid_data_blkaddr(blkaddr))
2168 break;
2169
2170 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2171 ret = -EFAULT;
2172 goto out_put_dnode;
2173 }
2174 cc->nr_cpages++;
2175 }
2176
2177 /* nothing to decompress */
2178 if (cc->nr_cpages == 0) {
2179 ret = 0;
2180 goto out_put_dnode;
2181 }
2182
2183 dic = f2fs_alloc_dic(cc);
2184 if (IS_ERR(dic)) {
2185 ret = PTR_ERR(dic);
2186 goto out_put_dnode;
2187 }
2188
2189 for (i = 0; i < dic->nr_cpages; i++) {
2190 struct page *page = dic->cpages[i];
2191 block_t blkaddr;
2192
a2ced1ce 2193 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2194 dn.ofs_in_node + i + 1);
2195
2196 if (bio && !page_is_mergeable(sbi, bio,
2197 *last_block_in_bio, blkaddr)) {
2198submit_and_realloc:
2199 __submit_bio(sbi, bio, DATA);
2200 bio = NULL;
2201 }
2202
2203 if (!bio) {
2204 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2205 is_readahead ? REQ_RAHEAD : 0,
0683728a 2206 page->index, for_write);
4c8ff709
CY		 2207 if (IS_ERR(bio)) {
2208 ret = PTR_ERR(bio);
2209 bio = NULL;
2210 dic->failed = true;
2211 if (refcount_sub_and_test(dic->nr_cpages - i,
2212 &dic->ref))
2213 f2fs_decompress_end_io(dic->rpages,
2214 cc->cluster_size, true,
2215 false);
2216 f2fs_free_dic(dic);
2217 f2fs_put_dnode(&dn);
2218 *bio_ret = bio;
2219 return ret;
2220 }
2221 }
2222
2223 f2fs_wait_on_block_writeback(inode, blkaddr);
2224
2225 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2226 goto submit_and_realloc;
2227
2228 inc_page_count(sbi, F2FS_RD_DATA);
8b83ac81 2229 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
4c8ff709
CY		 2230 ClearPageError(page);
2231 *last_block_in_bio = blkaddr;
2232 }
2233
2234 f2fs_put_dnode(&dn);
2235
2236 *bio_ret = bio;
2237 return 0;
2238
2239out_put_dnode:
2240 f2fs_put_dnode(&dn);
2241out:
2242 f2fs_decompress_end_io(cc->rpages, cc->cluster_size, true, false);
2243 *bio_ret = bio;
2244 return ret;
2245}
2246#endif
2247
f1e88660
JK		 2248/*
2249 * This function was originally taken from fs/mpage.c, and customized for f2fs.
2250 * Major change was from block_size == page_size in f2fs by default.
e2e59414
JK		 2251 *
2252 * Note that the aops->readpages() function is ONLY used for read-ahead. If
2253 * this function ever deviates from doing just read-ahead, it should either
2254 * use ->readpage() or do the necessary surgery to decouple ->readpages()
2255 * from read-ahead.
f1e88660 2256 */
4c8ff709 2257int f2fs_mpage_readpages(struct address_space *mapping,
f1e88660 2258 struct list_head *pages, struct page *page,
e2e59414 2259 unsigned nr_pages, bool is_readahead)
f1e88660
JK		 2260{
2261 struct bio *bio = NULL;
f1e88660
JK		 2262 sector_t last_block_in_bio = 0;
2263 struct inode *inode = mapping->host;
f1e88660 2264 struct f2fs_map_blocks map;
4c8ff709
CY		 2265#ifdef CONFIG_F2FS_FS_COMPRESSION
2266 struct compress_ctx cc = {
2267 .inode = inode,
2268 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2269 .cluster_size = F2FS_I(inode)->i_cluster_size,
2270 .cluster_idx = NULL_CLUSTER,
2271 .rpages = NULL,
2272 .cpages = NULL,
2273 .nr_rpages = 0,
2274 .nr_cpages = 0,
2275 };
2276#endif
2277 unsigned max_nr_pages = nr_pages;
2df0ab04 2278 int ret = 0;
f1e88660
JK		 2279
2280 map.m_pblk = 0;
2281 map.m_lblk = 0;
2282 map.m_len = 0;
2283 map.m_flags = 0;
da85985c 2284 map.m_next_pgofs = NULL;
c4020b2d 2285 map.m_next_extent = NULL;
d5097be5 2286 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 2287 map.m_may_create = false;
f1e88660 2288
736c0a74 2289 for (; nr_pages; nr_pages--) {
f1e88660 2290 if (pages) {
939afa94 2291 page = list_last_entry(pages, struct page, lru);
a83d50bc
KM		 2292
2293 prefetchw(&page->flags);
f1e88660
JK		 2294 list_del(&page->lru);
2295 if (add_to_page_cache_lru(page, mapping,
4969c06a 2296 page_index(page),
8a5c743e 2297 readahead_gfp_mask(mapping)))
f1e88660
JK		 2298 goto next_page;
2299 }
2300
4c8ff709
CY		 2301#ifdef CONFIG_F2FS_FS_COMPRESSION
2302 if (f2fs_compressed_file(inode)) {
2303 /* there are remained comressed pages, submit them */
2304 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2305 ret = f2fs_read_multi_pages(&cc, &bio,
2306 max_nr_pages,
2307 &last_block_in_bio,
0683728a 2308 is_readahead, false);
4c8ff709
CY		 2309 f2fs_destroy_compress_ctx(&cc);
2310 if (ret)
2311 goto set_error_page;
2312 }
2313 ret = f2fs_is_compressed_cluster(inode, page->index);
2314 if (ret < 0)
2315 goto set_error_page;
2316 else if (!ret)
2317 goto read_single_page;
2318
2319 ret = f2fs_init_compress_ctx(&cc);
2320 if (ret)
2321 goto set_error_page;
2322
2323 f2fs_compress_ctx_add_page(&cc, page);
2324
2325 goto next_page;
2326 }
2327read_single_page:
2328#endif
2329
2330 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
2331 &bio, &last_block_in_bio, is_readahead);
2df0ab04 2332 if (ret) {
4c8ff709
CY		 2333#ifdef CONFIG_F2FS_FS_COMPRESSION
2334set_error_page:
2335#endif
2df0ab04 2336 SetPageError(page);
09cbfeaf 2337 zero_user_segment(page, 0, PAGE_SIZE);
f1e88660 2338 unlock_page(page);
f1e88660 2339 }
f1e88660
JK		 2340next_page:
2341 if (pages)
09cbfeaf 2342 put_page(page);
4c8ff709
CY		 2343
2344#ifdef CONFIG_F2FS_FS_COMPRESSION
2345 if (f2fs_compressed_file(inode)) {
2346 /* last page */
2347 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2348 ret = f2fs_read_multi_pages(&cc, &bio,
2349 max_nr_pages,
2350 &last_block_in_bio,
0683728a 2351 is_readahead, false);
4c8ff709
CY		 2352 f2fs_destroy_compress_ctx(&cc);
2353 }
2354 }
2355#endif
f1e88660
JK		 2356 }
2357 BUG_ON(pages && !list_empty(pages));
2358 if (bio)
4fc29c1a 2359 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2df0ab04 2360 return pages ? 0 : ret;
f1e88660
JK		 2361}
2362
eb47b800
JK		 2363static int f2fs_read_data_page(struct file *file, struct page *page)
2364{
4969c06a 2365 struct inode *inode = page_file_mapping(page)->host;
b3d208f9 2366 int ret = -EAGAIN;
9ffe0fb5 2367
c20e89cd
CY		 2368 trace_f2fs_readpage(page, DATA);
2369
4c8ff709
CY		 2370 if (!f2fs_is_compress_backend_ready(inode)) {
2371 unlock_page(page);
2372 return -EOPNOTSUPP;
2373 }
2374
e1c42045 2375 /* If the file has inline data, try to read it directly */
9ffe0fb5
HL		 2376 if (f2fs_has_inline_data(inode))
2377 ret = f2fs_read_inline_data(inode, page);
b3d208f9 2378 if (ret == -EAGAIN)
4969c06a
JK		 2379 ret = f2fs_mpage_readpages(page_file_mapping(page),
2380 NULL, page, 1, false);
9ffe0fb5 2381 return ret;
eb47b800
JK		 2382}
2383
2384static int f2fs_read_data_pages(struct file *file,
2385 struct address_space *mapping,
2386 struct list_head *pages, unsigned nr_pages)
2387{
71cb4aff 2388 struct inode *inode = mapping->host;
939afa94 2389 struct page *page = list_last_entry(pages, struct page, lru);
b8c29400
CY		 2390
2391 trace_f2fs_readpages(inode, page, nr_pages);
9ffe0fb5 2392
4c8ff709
CY		 2393 if (!f2fs_is_compress_backend_ready(inode))
2394 return 0;
2395
9ffe0fb5
HL		 2396 /* If the file has inline data, skip readpages */
2397 if (f2fs_has_inline_data(inode))
2398 return 0;
2399
e2e59414 2400 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
eb47b800
JK		 2401}
2402
4c8ff709 2403int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
7eab0c0d
HP		 2404{
2405 struct inode *inode = fio->page->mapping->host;
4c8ff709 2406 struct page *mpage, *page;
7eab0c0d
HP		 2407 gfp_t gfp_flags = GFP_NOFS;
2408
1958593e 2409 if (!f2fs_encrypted_file(inode))
7eab0c0d
HP		 2410 return 0;
2411
4c8ff709
CY		 2412 page = fio->compressed_page ? fio->compressed_page : fio->page;
2413
6dbb1796 2414 /* wait for GCed page writeback via META_MAPPING */
0ded69f6 2415 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
7eab0c0d
HP		 2416
2417retry_encrypt:
4c8ff709
CY		 2418 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2419 PAGE_SIZE, 0, gfp_flags);
6aa58d8a
CY		 2420 if (IS_ERR(fio->encrypted_page)) {
2421 /* flush pending IOs and wait for a while in the ENOMEM case */
2422 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2423 f2fs_flush_merged_writes(fio->sbi);
5df7731f 2424 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
6aa58d8a
CY		 2425 gfp_flags |= __GFP_NOFAIL;
2426 goto retry_encrypt;
2427 }
2428 return PTR_ERR(fio->encrypted_page);
2429 }
7eab0c0d 2430
6aa58d8a
CY		 2431 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2432 if (mpage) {
2433 if (PageUptodate(mpage))
2434 memcpy(page_address(mpage),
2435 page_address(fio->encrypted_page), PAGE_SIZE);
2436 f2fs_put_page(mpage, 1);
7eab0c0d 2437 }
6aa58d8a 2438 return 0;
7eab0c0d
HP		 2439}
2440
bb9e3bb8
CY		 2441static inline bool check_inplace_update_policy(struct inode *inode,
2442 struct f2fs_io_info *fio)
7eab0c0d 2443{
bb9e3bb8
CY		 2444 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2445 unsigned int policy = SM_I(sbi)->ipu_policy;
7eab0c0d 2446
bb9e3bb8
CY		 2447 if (policy & (0x1 << F2FS_IPU_FORCE))
2448 return true;
4d57b86d 2449 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
bb9e3bb8
CY		 2450 return true;
2451 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2452 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2453 return true;
4d57b86d 2454 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
bb9e3bb8
CY		 2455 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2456 return true;
2457
2458 /*
2459 * IPU for rewrite async pages
2460 */
2461 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2462 fio && fio->op == REQ_OP_WRITE &&
2463 !(fio->op_flags & REQ_SYNC) &&
62230e0d 2464 !IS_ENCRYPTED(inode))
bb9e3bb8
CY		 2465 return true;
2466
2467 /* this is only set during fdatasync */
2468 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2469 is_inode_flag_set(inode, FI_NEED_IPU))
2470 return true;
2471
4354994f
DR		 2472 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2473 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2474 return true;
2475
bb9e3bb8
CY		 2476 return false;
2477}
2478
4d57b86d 2479bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8 2480{
1ad71a27
JK		 2481 if (f2fs_is_pinned_file(inode))
2482 return true;
bb9e3bb8
CY		 2483
2484 /* if this is cold file, we should overwrite to avoid fragmentation */
2485 if (file_is_cold(inode))
2486 return true;
2487
2488 return check_inplace_update_policy(inode, fio);
2489}
2490
4d57b86d 2491bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8
CY		 2492{
2493 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2494
b0332a0f 2495 if (f2fs_lfs_mode(sbi))
bb9e3bb8
CY		 2496 return true;
2497 if (S_ISDIR(inode->i_mode))
2498 return true;
af033b2a
CY		 2499 if (IS_NOQUOTA(inode))
2500 return true;
bb9e3bb8
CY		 2501 if (f2fs_is_atomic_file(inode))
2502 return true;
2503 if (fio) {
2504 if (is_cold_data(fio->page))
2505 return true;
2506 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
2507 return true;
4354994f
DR		 2508 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2509 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2510 return true;
bb9e3bb8
CY		 2511 }
2512 return false;
2513}
2514
7eab0c0d
HP		 2515static inline bool need_inplace_update(struct f2fs_io_info *fio)
2516{
2517 struct inode *inode = fio->page->mapping->host;
2518
4d57b86d 2519 if (f2fs_should_update_outplace(inode, fio))
7eab0c0d
HP		 2520 return false;
2521
4d57b86d 2522 return f2fs_should_update_inplace(inode, fio);
7eab0c0d
HP		 2523}
2524
4d57b86d 2525int f2fs_do_write_data_page(struct f2fs_io_info *fio)
eb47b800 2526{
05ca3632 2527 struct page *page = fio->page;
eb47b800 2528 struct inode *inode = page->mapping->host;
eb47b800 2529 struct dnode_of_data dn;
e959c8f5 2530 struct extent_info ei = {0,0,0};
7735730d 2531 struct node_info ni;
e959c8f5 2532 bool ipu_force = false;
eb47b800
JK		 2533 int err = 0;
2534
2535 set_new_dnode(&dn, inode, NULL, NULL, 0);
e959c8f5
HP		 2536 if (need_inplace_update(fio) &&
2537 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2538 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
a817737e 2539
c9b60788 2540 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2541 DATA_GENERIC_ENHANCE))
10f966bb 2542 return -EFSCORRUPTED;
c9b60788
CY		 2543
2544 ipu_force = true;
2545 fio->need_lock = LOCK_DONE;
2546 goto got_it;
e959c8f5 2547 }
279d6df2 2548
d29460e5
JK		 2549 /* Deadlock due to between page->lock and f2fs_lock_op */
2550 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2551 return -EAGAIN;
279d6df2 2552
4d57b86d 2553 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
eb47b800 2554 if (err)
279d6df2 2555 goto out;
eb47b800 2556
28bc106b 2557 fio->old_blkaddr = dn.data_blkaddr;
eb47b800
JK		 2558
2559 /* This page is already truncated */
7a9d7548 2560 if (fio->old_blkaddr == NULL_ADDR) {
2bca1e23 2561 ClearPageUptodate(page);
2baf0781 2562 clear_cold_data(page);
eb47b800 2563 goto out_writepage;
2bca1e23 2564 }
e959c8f5 2565got_it:
c9b60788
CY		 2566 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2567 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2568 DATA_GENERIC_ENHANCE)) {
10f966bb 2569 err = -EFSCORRUPTED;
c9b60788
CY		 2570 goto out_writepage;
2571 }
eb47b800
JK		 2572 /*
2573 * If current allocation needs SSR,
2574 * it had better in-place writes for updated data.
2575 */
93770ab7
CY		 2576 if (ipu_force ||
2577 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
7b525dd0 2578 need_inplace_update(fio))) {
4c8ff709 2579 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2580 if (err)
2581 goto out_writepage;
2582
2583 set_page_writeback(page);
17c50035 2584 ClearPageError(page);
279d6df2 2585 f2fs_put_dnode(&dn);
cc15620b 2586 if (fio->need_lock == LOCK_REQ)
279d6df2 2587 f2fs_unlock_op(fio->sbi);
4d57b86d 2588 err = f2fs_inplace_write_data(fio);
6492a335
CY		 2589 if (err) {
2590 if (f2fs_encrypted_file(inode))
d2d0727b 2591 fscrypt_finalize_bounce_page(&fio->encrypted_page);
6492a335
CY		 2592 if (PageWriteback(page))
2593 end_page_writeback(page);
cd23ffa9
CY		 2594 } else {
2595 set_inode_flag(inode, FI_UPDATE_WRITE);
6492a335 2596 }
7eab0c0d 2597 trace_f2fs_do_write_data_page(fio->page, IPU);
279d6df2 2598 return err;
eb47b800 2599 }
279d6df2 2600
cc15620b
JK		 2601 if (fio->need_lock == LOCK_RETRY) {
2602 if (!f2fs_trylock_op(fio->sbi)) {
2603 err = -EAGAIN;
2604 goto out_writepage;
2605 }
2606 fio->need_lock = LOCK_REQ;
2607 }
2608
7735730d
CY		 2609 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2610 if (err)
2611 goto out_writepage;
2612
2613 fio->version = ni.version;
2614
4c8ff709 2615 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2616 if (err)
2617 goto out_writepage;
2618
2619 set_page_writeback(page);
17c50035 2620 ClearPageError(page);
cc15620b 2621
4c8ff709
CY		 2622 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2623 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2624
279d6df2 2625 /* LFS mode write path */
4d57b86d 2626 f2fs_outplace_write_data(&dn, fio);
279d6df2
HP		 2627 trace_f2fs_do_write_data_page(page, OPU);
2628 set_inode_flag(inode, FI_APPEND_WRITE);
2629 if (page->index == 0)
2630 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
eb47b800
JK		 2631out_writepage:
2632 f2fs_put_dnode(&dn);
279d6df2 2633out:
cc15620b 2634 if (fio->need_lock == LOCK_REQ)
279d6df2 2635 f2fs_unlock_op(fio->sbi);
eb47b800
JK		 2636 return err;
2637}
2638
4c8ff709 2639int f2fs_write_single_data_page(struct page *page, int *submitted,
8648de2c
CY		 2640 struct bio **bio,
2641 sector_t *last_block,
b0af6d49 2642 struct writeback_control *wbc,
4c8ff709
CY		 2643 enum iostat_type io_type,
2644 int compr_blocks)
eb47b800
JK		 2645{
2646 struct inode *inode = page->mapping->host;
4081363f 2647 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
eb47b800 2648 loff_t i_size = i_size_read(inode);
4c8ff709 2649 const pgoff_t end_index = ((unsigned long long)i_size)
09cbfeaf 2650 >> PAGE_SHIFT;
1f0d5c91 2651 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
9ffe0fb5 2652 unsigned offset = 0;
39936837 2653 bool need_balance_fs = false;
eb47b800 2654 int err = 0;
458e6197 2655 struct f2fs_io_info fio = {
05ca3632 2656 .sbi = sbi,
39d787be 2657 .ino = inode->i_ino,
458e6197 2658 .type = DATA,
04d328de 2659 .op = REQ_OP_WRITE,
7637241e 2660 .op_flags = wbc_to_write_flags(wbc),
e959c8f5 2661 .old_blkaddr = NULL_ADDR,
05ca3632 2662 .page = page,
4375a336 2663 .encrypted_page = NULL,
d68f735b 2664 .submitted = false,
4c8ff709 2665 .compr_blocks = compr_blocks,
cc15620b 2666 .need_lock = LOCK_RETRY,
b0af6d49 2667 .io_type = io_type,
578c6478 2668 .io_wbc = wbc,
8648de2c
CY		 2669 .bio = bio,
2670 .last_block = last_block,
458e6197 2671 };
eb47b800 2672
ecda0de3
CY		 2673 trace_f2fs_writepage(page, DATA);
2674
db198ae0
CY		 2675 /* we should bypass data pages to proceed the kworkder jobs */
2676 if (unlikely(f2fs_cp_error(sbi))) {
2677 mapping_set_error(page->mapping, -EIO);
1174abfd
CY		 2678 /*
2679 * don't drop any dirty dentry pages for keeping lastest
2680 * directory structure.
2681 */
2682 if (S_ISDIR(inode->i_mode))
2683 goto redirty_out;
db198ae0
CY		 2684 goto out;
2685 }
2686
0771fcc7
CY		 2687 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2688 goto redirty_out;
2689
4c8ff709
CY		 2690 if (page->index < end_index ||
2691 f2fs_verity_in_progress(inode) ||
2692 compr_blocks)
39936837 2693 goto write;
eb47b800
JK		 2694
2695 /*
2696 * If the offset is out-of-range of file size,
2697 * this page does not have to be written to disk.
2698 */
09cbfeaf 2699 offset = i_size & (PAGE_SIZE - 1);
76f60268 2700 if ((page->index >= end_index + 1) || !offset)
39936837 2701 goto out;
eb47b800 2702
09cbfeaf 2703 zero_user_segment(page, offset, PAGE_SIZE);
39936837 2704write:
1e84371f
JK		 2705 if (f2fs_is_drop_cache(inode))
2706 goto out;
e6e5f561
JK		 2707 /* we should not write 0'th page having journal header */
2708 if (f2fs_is_volatile_file(inode) && (!page->index ||
2709 (!wbc->for_reclaim &&
4d57b86d 2710 f2fs_available_free_memory(sbi, BASE_CHECK))))
1e84371f 2711 goto redirty_out;
eb47b800 2712
435cbab9
JK		 2713 /* Dentry/quota blocks are controlled by checkpoint */
2714 if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
cc15620b 2715 fio.need_lock = LOCK_DONE;
4d57b86d 2716 err = f2fs_do_write_data_page(&fio);
8618b881
JK		 2717 goto done;
2718 }
9ffe0fb5 2719
8618b881 2720 if (!wbc->for_reclaim)
39936837 2721 need_balance_fs = true;
7f3037a5 2722 else if (has_not_enough_free_secs(sbi, 0, 0))
39936837 2723 goto redirty_out;
ef095d19
JK		 2724 else
2725 set_inode_flag(inode, FI_HOT_DATA);
eb47b800 2726
b3d208f9 2727 err = -EAGAIN;
dd7b2333 2728 if (f2fs_has_inline_data(inode)) {
b3d208f9 2729 err = f2fs_write_inline_data(inode, page);
dd7b2333
YH		 2730 if (!err)
2731 goto out;
2732 }
279d6df2 2733
cc15620b 2734 if (err == -EAGAIN) {
4d57b86d 2735 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2736 if (err == -EAGAIN) {
2737 fio.need_lock = LOCK_REQ;
4d57b86d 2738 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2739 }
2740 }
a0d00fad 2741
eb449797
CY		 2742 if (err) {
2743 file_set_keep_isize(inode);
2744 } else {
c10c9820 2745 spin_lock(&F2FS_I(inode)->i_size_lock);
eb449797
CY		 2746 if (F2FS_I(inode)->last_disk_size < psize)
2747 F2FS_I(inode)->last_disk_size = psize;
c10c9820 2748 spin_unlock(&F2FS_I(inode)->i_size_lock);
eb449797 2749 }
279d6df2 2750
8618b881
JK		 2751done:
2752 if (err && err != -ENOENT)
2753 goto redirty_out;
eb47b800 2754
39936837 2755out:
a7ffdbe2 2756 inode_dec_dirty_pages(inode);
2baf0781 2757 if (err) {
2bca1e23 2758 ClearPageUptodate(page);
2baf0781
CY		 2759 clear_cold_data(page);
2760 }
0c3a5797
CY		 2761
2762 if (wbc->for_reclaim) {
bab475c5 2763 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
ef095d19 2764 clear_inode_flag(inode, FI_HOT_DATA);
4d57b86d 2765 f2fs_remove_dirty_inode(inode);
d68f735b 2766 submitted = NULL;
0c3a5797 2767 }
eb47b800 2768 unlock_page(page);
186857c5 2769 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
0b20fcec 2770 !F2FS_I(inode)->cp_task)
a7881893 2771 f2fs_balance_fs(sbi, need_balance_fs);
0c3a5797 2772
d68f735b 2773 if (unlikely(f2fs_cp_error(sbi))) {
b9109b0e 2774 f2fs_submit_merged_write(sbi, DATA);
0b20fcec 2775 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
d68f735b
JK		 2776 submitted = NULL;
2777 }
2778
2779 if (submitted)
4c8ff709 2780 *submitted = fio.submitted ? 1 : 0;
0c3a5797 2781
eb47b800
JK		 2782 return 0;
2783
eb47b800 2784redirty_out:
76f60268 2785 redirty_page_for_writepage(wbc, page);
5b19d284
JK		 2786 /*
2787 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2788 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2789 * file_write_and_wait_range() will see EIO error, which is critical
2790 * to return value of fsync() followed by atomic_write failure to user.
2791 */
2792 if (!err || wbc->for_reclaim)
0002b61b 2793 return AOP_WRITEPAGE_ACTIVATE;
b230e6ca
JK		 2794 unlock_page(page);
2795 return err;
fa9150a8
NJ		 2796}
2797
f566bae8
JK		 2798static int f2fs_write_data_page(struct page *page,
2799 struct writeback_control *wbc)
2800{
4c8ff709
CY		 2801#ifdef CONFIG_F2FS_FS_COMPRESSION
2802 struct inode *inode = page->mapping->host;
2803
2804 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2805 goto out;
2806
2807 if (f2fs_compressed_file(inode)) {
2808 if (f2fs_is_compressed_cluster(inode, page->index)) {
2809 redirty_page_for_writepage(wbc, page);
2810 return AOP_WRITEPAGE_ACTIVATE;
2811 }
2812 }
2813out:
2814#endif
2815
2816 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
2817 wbc, FS_DATA_IO, 0);
f566bae8
JK		 2818}
2819
8f46dcae
CY		 2820/*
2821 * This function was copied from write_cche_pages from mm/page-writeback.c.
2822 * The major change is making write step of cold data page separately from
2823 * warm/hot data page.
2824 */
2825static int f2fs_write_cache_pages(struct address_space *mapping,
b0af6d49
CY		 2826 struct writeback_control *wbc,
2827 enum iostat_type io_type)
8f46dcae
CY		 2828{
2829 int ret = 0;
4c8ff709 2830 int done = 0, retry = 0;
8f46dcae 2831 struct pagevec pvec;
c29fd0c0 2832 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
8648de2c
CY		 2833 struct bio *bio = NULL;
2834 sector_t last_block;
4c8ff709
CY		 2835#ifdef CONFIG_F2FS_FS_COMPRESSION
2836 struct inode *inode = mapping->host;
2837 struct compress_ctx cc = {
2838 .inode = inode,
2839 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2840 .cluster_size = F2FS_I(inode)->i_cluster_size,
2841 .cluster_idx = NULL_CLUSTER,
2842 .rpages = NULL,
2843 .nr_rpages = 0,
2844 .cpages = NULL,
2845 .rbuf = NULL,
2846 .cbuf = NULL,
2847 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2848 .private = NULL,
2849 };
2850#endif
8f46dcae
CY		 2851 int nr_pages;
2852 pgoff_t uninitialized_var(writeback_index);
2853 pgoff_t index;
2854 pgoff_t end; /* Inclusive */
2855 pgoff_t done_index;
2856 int cycled;
2857 int range_whole = 0;
10bbd235 2858 xa_mark_t tag;
bab475c5 2859 int nwritten = 0;
4c8ff709
CY		 2860 int submitted = 0;
2861 int i;
8f46dcae 2862
86679820 2863 pagevec_init(&pvec);
46ae957f 2864
ef095d19
JK		 2865 if (get_dirty_pages(mapping->host) <=
2866 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2867 set_inode_flag(mapping->host, FI_HOT_DATA);
2868 else
2869 clear_inode_flag(mapping->host, FI_HOT_DATA);
2870
8f46dcae
CY		 2871 if (wbc->range_cyclic) {
2872 writeback_index = mapping->writeback_index; /* prev offset */
2873 index = writeback_index;
2874 if (index == 0)
2875 cycled = 1;
2876 else
2877 cycled = 0;
2878 end = -1;
2879 } else {
09cbfeaf
KS		 2880 index = wbc->range_start >> PAGE_SHIFT;
2881 end = wbc->range_end >> PAGE_SHIFT;
8f46dcae
CY		 2882 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2883 range_whole = 1;
2884 cycled = 1; /* ignore range_cyclic tests */
2885 }
2886 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2887 tag = PAGECACHE_TAG_TOWRITE;
2888 else
2889 tag = PAGECACHE_TAG_DIRTY;
2890retry:
4c8ff709 2891 retry = 0;
8f46dcae
CY		 2892 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2893 tag_pages_for_writeback(mapping, index, end);
2894 done_index = index;
4c8ff709 2895 while (!done && !retry && (index <= end)) {
69c4f35d 2896 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
67fd707f 2897 tag);
8f46dcae
CY		 2898 if (nr_pages == 0)
2899 break;
2900
2901 for (i = 0; i < nr_pages; i++) {
2902 struct page *page = pvec.pages[i];
4c8ff709
CY		 2903 bool need_readd;
2904readd:
2905 need_readd = false;
2906#ifdef CONFIG_F2FS_FS_COMPRESSION
2907 if (f2fs_compressed_file(inode)) {
2908 ret = f2fs_init_compress_ctx(&cc);
2909 if (ret) {
2910 done = 1;
2911 break;
2912 }
2913
2914 if (!f2fs_cluster_can_merge_page(&cc,
2915 page->index)) {
2916 ret = f2fs_write_multi_pages(&cc,
2917 &submitted, wbc, io_type);
2918 if (!ret)
2919 need_readd = true;
2920 goto result;
2921 }
8f46dcae 2922
4c8ff709
CY		 2923 if (unlikely(f2fs_cp_error(sbi)))
2924 goto lock_page;
2925
2926 if (f2fs_cluster_is_empty(&cc)) {
2927 void *fsdata = NULL;
2928 struct page *pagep;
2929 int ret2;
2930
2931 ret2 = f2fs_prepare_compress_overwrite(
2932 inode, &pagep,
2933 page->index, &fsdata);
2934 if (ret2 < 0) {
2935 ret = ret2;
2936 done = 1;
2937 break;
2938 } else if (ret2 &&
2939 !f2fs_compress_write_end(inode,
2940 fsdata, page->index,
2941 1)) {
2942 retry = 1;
2943 break;
2944 }
2945 } else {
2946 goto lock_page;
2947 }
2948 }
2949#endif
f8de4331 2950 /* give a priority to WB_SYNC threads */
c29fd0c0 2951 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
f8de4331
CY		 2952 wbc->sync_mode == WB_SYNC_NONE) {
2953 done = 1;
2954 break;
2955 }
4c8ff709
CY		 2956#ifdef CONFIG_F2FS_FS_COMPRESSION
2957lock_page:
2958#endif
8f46dcae 2959 done_index = page->index;
d29460e5 2960retry_write:
8f46dcae
CY		 2961 lock_page(page);
2962
2963 if (unlikely(page->mapping != mapping)) {
2964continue_unlock:
2965 unlock_page(page);
2966 continue;
2967 }
2968
2969 if (!PageDirty(page)) {
2970 /* someone wrote it for us */
2971 goto continue_unlock;
2972 }
2973
8f46dcae 2974 if (PageWriteback(page)) {
0b20fcec 2975 if (wbc->sync_mode != WB_SYNC_NONE)
fec1d657 2976 f2fs_wait_on_page_writeback(page,
bae0ee7a 2977 DATA, true, true);
0b20fcec 2978 else
8f46dcae
CY		 2979 goto continue_unlock;
2980 }
2981
8f46dcae
CY		 2982 if (!clear_page_dirty_for_io(page))
2983 goto continue_unlock;
2984
4c8ff709
CY		 2985#ifdef CONFIG_F2FS_FS_COMPRESSION
2986 if (f2fs_compressed_file(inode)) {
2987 get_page(page);
2988 f2fs_compress_ctx_add_page(&cc, page);
2989 continue;
2990 }
2991#endif
2992 ret = f2fs_write_single_data_page(page, &submitted,
2993 &bio, &last_block, wbc, io_type, 0);
2994 if (ret == AOP_WRITEPAGE_ACTIVATE)
2995 unlock_page(page);
2996#ifdef CONFIG_F2FS_FS_COMPRESSION
2997result:
2998#endif
2999 nwritten += submitted;
3000 wbc->nr_to_write -= submitted;
3001
8f46dcae 3002 if (unlikely(ret)) {
0002b61b
CY		 3003 /*
3004 * keep nr_to_write, since vfs uses this to
3005 * get # of written pages.
3006 */
3007 if (ret == AOP_WRITEPAGE_ACTIVATE) {
0002b61b 3008 ret = 0;
4c8ff709 3009 goto next;
d29460e5
JK		 3010 } else if (ret == -EAGAIN) {
3011 ret = 0;
3012 if (wbc->sync_mode == WB_SYNC_ALL) {
3013 cond_resched();
3014 congestion_wait(BLK_RW_ASYNC,
5df7731f 3015 DEFAULT_IO_TIMEOUT);
d29460e5
JK		 3016 goto retry_write;
3017 }
4c8ff709 3018 goto next;
0002b61b 3019 }
b230e6ca
JK		 3020 done_index = page->index + 1;
3021 done = 1;
3022 break;
8f46dcae
CY		 3023 }
3024
4c8ff709 3025 if (wbc->nr_to_write <= 0 &&
687de7f1 3026 wbc->sync_mode == WB_SYNC_NONE) {
8f46dcae
CY		 3027 done = 1;
3028 break;
3029 }
4c8ff709
CY		 3030next:
3031 if (need_readd)
3032 goto readd;
8f46dcae
CY		 3033 }
3034 pagevec_release(&pvec);
3035 cond_resched();
3036 }
4c8ff709
CY		 3037#ifdef CONFIG_F2FS_FS_COMPRESSION
3038 /* flush remained pages in compress cluster */
3039 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
3040 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
3041 nwritten += submitted;
3042 wbc->nr_to_write -= submitted;
3043 if (ret) {
3044 done = 1;
3045 retry = 0;
3046 }
3047 }
3048#endif
3049 if ((!cycled && !done) || retry) {
8f46dcae
CY		 3050 cycled = 1;
3051 index = 0;
3052 end = writeback_index - 1;
3053 goto retry;
3054 }
3055 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
3056 mapping->writeback_index = done_index;
3057
bab475c5 3058 if (nwritten)
b9109b0e 3059 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
bab475c5 3060 NULL, 0, DATA);
8648de2c
CY		 3061 /* submit cached bio of IPU write */
3062 if (bio)
0b20fcec 3063 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
6ca56ca4 3064
8f46dcae
CY		 3065 return ret;
3066}
3067
853137ce
JK		 3068static inline bool __should_serialize_io(struct inode *inode,
3069 struct writeback_control *wbc)
3070{
b13f67ff
CY		 3071 /* to avoid deadlock in path of data flush */
3072 if (F2FS_I(inode)->cp_task)
3073 return false;
3074
853137ce
JK		 3075 if (!S_ISREG(inode->i_mode))
3076 return false;
af033b2a
CY		 3077 if (IS_NOQUOTA(inode))
3078 return false;
b13f67ff
CY		 3079
3080 if (f2fs_compressed_file(inode))
3081 return true;
853137ce
JK		 3082 if (wbc->sync_mode != WB_SYNC_ALL)
3083 return true;
3084 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
3085 return true;
3086 return false;
3087}
3088
fc99fe27 3089static int __f2fs_write_data_pages(struct address_space *mapping,
b0af6d49
CY		 3090 struct writeback_control *wbc,
3091 enum iostat_type io_type)
eb47b800
JK		 3092{
3093 struct inode *inode = mapping->host;
4081363f 3094 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9dfa1baf 3095 struct blk_plug plug;
eb47b800 3096 int ret;
853137ce 3097 bool locked = false;
eb47b800 3098
cfb185a1 3099 /* deal with chardevs and other special file */
3100 if (!mapping->a_ops->writepage)
3101 return 0;
3102
6a290544
CY		 3103 /* skip writing if there is no dirty page in this inode */
3104 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3105 return 0;
3106
0771fcc7
CY		 3107 /* during POR, we don't need to trigger writepage at all. */
3108 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3109 goto skip_write;
3110
af033b2a
CY		 3111 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3112 wbc->sync_mode == WB_SYNC_NONE &&
a1257023 3113 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
4d57b86d 3114 f2fs_available_free_memory(sbi, DIRTY_DENTS))
a1257023
JK		 3115 goto skip_write;
3116
d323d005 3117 /* skip writing during file defragment */
91942321 3118 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
d323d005
CY		 3119 goto skip_write;
3120
d31c7c3f
YH		 3121 trace_f2fs_writepages(mapping->host, wbc, DATA);
3122
687de7f1
JK		 3123 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
3124 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0
CY		 3125 atomic_inc(&sbi->wb_sync_req[DATA]);
3126 else if (atomic_read(&sbi->wb_sync_req[DATA]))
687de7f1
JK		 3127 goto skip_write;
3128
853137ce
JK		 3129 if (__should_serialize_io(inode, wbc)) {
3130 mutex_lock(&sbi->writepages);
3131 locked = true;
3132 }
3133
9dfa1baf 3134 blk_start_plug(&plug);
b0af6d49 3135 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
9dfa1baf 3136 blk_finish_plug(&plug);
687de7f1 3137
853137ce
JK		 3138 if (locked)
3139 mutex_unlock(&sbi->writepages);
3140
687de7f1 3141 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0 3142 atomic_dec(&sbi->wb_sync_req[DATA]);
28ea6162
JK		 3143 /*
3144 * if some pages were truncated, we cannot guarantee its mapping->host
3145 * to detect pending bios.
3146 */
458e6197 3147
4d57b86d 3148 f2fs_remove_dirty_inode(inode);
eb47b800 3149 return ret;
d3baf95d
JK		 3150
3151skip_write:
a7ffdbe2 3152 wbc->pages_skipped += get_dirty_pages(inode);
d31c7c3f 3153 trace_f2fs_writepages(mapping->host, wbc, DATA);
d3baf95d 3154 return 0;
eb47b800
JK		 3155}
3156
b0af6d49
CY		 3157static int f2fs_write_data_pages(struct address_space *mapping,
3158 struct writeback_control *wbc)
3159{
3160 struct inode *inode = mapping->host;
3161
3162 return __f2fs_write_data_pages(mapping, wbc,
3163 F2FS_I(inode)->cp_task == current ?
3164 FS_CP_DATA_IO : FS_DATA_IO);
3165}
3166
3aab8f82
CY		 3167static void f2fs_write_failed(struct address_space *mapping, loff_t to)
3168{
3169 struct inode *inode = mapping->host;
819d9153 3170 loff_t i_size = i_size_read(inode);
3aab8f82 3171
3f188c23
JK		 3172 if (IS_NOQUOTA(inode))
3173 return;
3174
95ae251f
EB		 3175 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
3176 if (to > i_size && !f2fs_verity_in_progress(inode)) {
a33c1502 3177 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
6f8d4455 3178 down_write(&F2FS_I(inode)->i_mmap_sem);
a33c1502 3179
819d9153 3180 truncate_pagecache(inode, i_size);
3f188c23 3181 f2fs_truncate_blocks(inode, i_size, true);
a33c1502 3182
5a3a2d83 3183 up_write(&F2FS_I(inode)->i_mmap_sem);
6f8d4455 3184 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3aab8f82
CY		 3185 }
3186}
3187
2aadac08
JK		 3188static int prepare_write_begin(struct f2fs_sb_info *sbi,
3189 struct page *page, loff_t pos, unsigned len,
3190 block_t *blk_addr, bool *node_changed)
3191{
3192 struct inode *inode = page->mapping->host;
3193 pgoff_t index = page->index;
3194 struct dnode_of_data dn;
3195 struct page *ipage;
b4d07a3e 3196 bool locked = false;
e15882b6 3197 struct extent_info ei = {0,0,0};
2aadac08 3198 int err = 0;
2866fb16 3199 int flag;
2aadac08 3200
24b84912
JK		 3201 /*
3202 * we already allocated all the blocks, so we don't need to get
3203 * the block addresses when there is no need to fill the page.
3204 */
dc91de78 3205 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
95ae251f
EB		 3206 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
3207 !f2fs_verity_in_progress(inode))
24b84912
JK		 3208 return 0;
3209
2866fb16
SY		 3210 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
3211 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3212 flag = F2FS_GET_BLOCK_DEFAULT;
3213 else
3214 flag = F2FS_GET_BLOCK_PRE_AIO;
3215
b4d07a3e 3216 if (f2fs_has_inline_data(inode) ||
09cbfeaf 3217 (pos & PAGE_MASK) >= i_size_read(inode)) {
2866fb16 3218 __do_map_lock(sbi, flag, true);
b4d07a3e
JK		 3219 locked = true;
3220 }
4c8ff709 3221
b4d07a3e 3222restart:
2aadac08 3223 /* check inline_data */
4d57b86d 3224 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2aadac08
JK		 3225 if (IS_ERR(ipage)) {
3226 err = PTR_ERR(ipage);
3227 goto unlock_out;
3228 }
3229
3230 set_new_dnode(&dn, inode, ipage, ipage, 0);
3231
3232 if (f2fs_has_inline_data(inode)) {
f2470371 3233 if (pos + len <= MAX_INLINE_DATA(inode)) {
4d57b86d 3234 f2fs_do_read_inline_data(page, ipage);
91942321 3235 set_inode_flag(inode, FI_DATA_EXIST);
ab47036d
CY		 3236 if (inode->i_nlink)
3237 set_inline_node(ipage);
2aadac08
JK		 3238 } else {
3239 err = f2fs_convert_inline_page(&dn, page);
3240 if (err)
b4d07a3e
JK		 3241 goto out;
3242 if (dn.data_blkaddr == NULL_ADDR)
3243 err = f2fs_get_block(&dn, index);
3244 }
3245 } else if (locked) {
3246 err = f2fs_get_block(&dn, index);
3247 } else {
3248 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3249 dn.data_blkaddr = ei.blk + index - ei.fofs;
3250 } else {
b4d07a3e 3251 /* hole case */
4d57b86d 3252 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
4da7bf5a 3253 if (err || dn.data_blkaddr == NULL_ADDR) {
b4d07a3e 3254 f2fs_put_dnode(&dn);
59c9081b
YH		 3255 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
3256 true);
2866fb16 3257 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
b4d07a3e
JK		 3258 locked = true;
3259 goto restart;
3260 }
2aadac08
JK		 3261 }
3262 }
b4d07a3e 3263
2aadac08
JK		 3264 /* convert_inline_page can make node_changed */
3265 *blk_addr = dn.data_blkaddr;
3266 *node_changed = dn.node_changed;
b4d07a3e 3267out:
2aadac08
JK		 3268 f2fs_put_dnode(&dn);
3269unlock_out:
b4d07a3e 3270 if (locked)
2866fb16 3271 __do_map_lock(sbi, flag, false);
2aadac08
JK		 3272 return err;
3273}
3274
eb47b800
JK		 3275static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3276 loff_t pos, unsigned len, unsigned flags,
3277 struct page **pagep, void **fsdata)
3278{
3279 struct inode *inode = mapping->host;
4081363f 3280 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86531d6b 3281 struct page *page = NULL;
09cbfeaf 3282 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
a2e2e76b 3283 bool need_balance = false, drop_atomic = false;
2aadac08 3284 block_t blkaddr = NULL_ADDR;
eb47b800
JK		 3285 int err = 0;
3286
62aed044
CY		 3287 trace_f2fs_write_begin(inode, pos, len, flags);
3288
00e09c0b
CY		 3289 if (!f2fs_is_checkpoint_ready(sbi)) {
3290 err = -ENOSPC;
4354994f 3291 goto fail;
00e09c0b 3292 }
4354994f 3293
455e3a58
JK		 3294 if ((f2fs_is_atomic_file(inode) &&
3295 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3296 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
57864ae5 3297 err = -ENOMEM;
a2e2e76b 3298 drop_atomic = true;
57864ae5
JK		 3299 goto fail;
3300 }
3301
5f727395
JK		 3302 /*
3303 * We should check this at this moment to avoid deadlock on inode page
3304 * and #0 page. The locking rule for inline_data conversion should be:
3305 * lock_page(page #0) -> lock_page(inode_page)
3306 */
3307 if (index != 0) {
3308 err = f2fs_convert_inline_inode(inode);
3309 if (err)
3310 goto fail;
3311 }
4c8ff709
CY		 3312
3313#ifdef CONFIG_F2FS_FS_COMPRESSION
3314 if (f2fs_compressed_file(inode)) {
3315 int ret;
3316
3317 *fsdata = NULL;
3318
3319 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3320 index, fsdata);
3321 if (ret < 0) {
3322 err = ret;
3323 goto fail;
3324 } else if (ret) {
3325 return 0;
3326 }
3327 }
3328#endif
3329
afcb7ca0 3330repeat:
86d54795
JK		 3331 /*
3332 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
3333 * wait_for_stable_page. Will wait that below with our IO control.
3334 */
01eccef7 3335 page = f2fs_pagecache_get_page(mapping, index,
86d54795 3336 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3aab8f82
CY		 3337 if (!page) {
3338 err = -ENOMEM;
3339 goto fail;
3340 }
d5f66990 3341
4c8ff709
CY		 3342 /* TODO: cluster can be compressed due to race with .writepage */
3343
eb47b800
JK		 3344 *pagep = page;
3345
2aadac08
JK		 3346 err = prepare_write_begin(sbi, page, pos, len,
3347 &blkaddr, &need_balance);
9ba69cf9 3348 if (err)
2aadac08 3349 goto fail;
9ba69cf9 3350
af033b2a
CY		 3351 if (need_balance && !IS_NOQUOTA(inode) &&
3352 has_not_enough_free_secs(sbi, 0, 0)) {
2a340760 3353 unlock_page(page);
2c4db1a6 3354 f2fs_balance_fs(sbi, true);
2a340760
JK		 3355 lock_page(page);
3356 if (page->mapping != mapping) {
3357 /* The page got truncated from under us */
3358 f2fs_put_page(page, 1);
3359 goto repeat;
3360 }
3361 }
3362
bae0ee7a 3363 f2fs_wait_on_page_writeback(page, DATA, false, true);
b3d208f9 3364
649d7df2
JK		 3365 if (len == PAGE_SIZE || PageUptodate(page))
3366 return 0;
eb47b800 3367
95ae251f
EB		 3368 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3369 !f2fs_verity_in_progress(inode)) {
746e2403
YH		 3370 zero_user_segment(page, len, PAGE_SIZE);
3371 return 0;
3372 }
3373
2aadac08 3374 if (blkaddr == NEW_ADDR) {
09cbfeaf 3375 zero_user_segment(page, 0, PAGE_SIZE);
649d7df2 3376 SetPageUptodate(page);
eb47b800 3377 } else {
93770ab7
CY		 3378 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3379 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 3380 err = -EFSCORRUPTED;
93770ab7
CY		 3381 goto fail;
3382 }
0683728a 3383 err = f2fs_submit_page_read(inode, page, blkaddr, true);
13ba41e3 3384 if (err)
78682f79 3385 goto fail;
d54c795b 3386
393ff91f 3387 lock_page(page);
6bacf52f 3388 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 3389 f2fs_put_page(page, 1);
3390 goto repeat;
eb47b800 3391 }
1563ac75
CY		 3392 if (unlikely(!PageUptodate(page))) {
3393 err = -EIO;
3394 goto fail;
4375a336 3395 }
eb47b800 3396 }
eb47b800 3397 return 0;
9ba69cf9 3398
3aab8f82 3399fail:
86531d6b 3400 f2fs_put_page(page, 1);
3aab8f82 3401 f2fs_write_failed(mapping, pos + len);
a2e2e76b 3402 if (drop_atomic)
4d57b86d 3403 f2fs_drop_inmem_pages_all(sbi, false);
3aab8f82 3404 return err;
eb47b800
JK		 3405}
3406
a1dd3c13
JK		 3407static int f2fs_write_end(struct file *file,
3408 struct address_space *mapping,
3409 loff_t pos, unsigned len, unsigned copied,
3410 struct page *page, void *fsdata)
3411{
3412 struct inode *inode = page->mapping->host;
3413
dfb2bf38
CY		 3414 trace_f2fs_write_end(inode, pos, len, copied);
3415
649d7df2
JK		 3416 /*
3417 * This should be come from len == PAGE_SIZE, and we expect copied
3418 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
3419 * let generic_perform_write() try to copy data again through copied=0.
3420 */
3421 if (!PageUptodate(page)) {
746e2403 3422 if (unlikely(copied != len))
649d7df2
JK		 3423 copied = 0;
3424 else
3425 SetPageUptodate(page);
3426 }
4c8ff709
CY		 3427
3428#ifdef CONFIG_F2FS_FS_COMPRESSION
3429 /* overwrite compressed file */
3430 if (f2fs_compressed_file(inode) && fsdata) {
3431 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3432 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3433 return copied;
3434 }
3435#endif
3436
649d7df2
JK		 3437 if (!copied)
3438 goto unlock_out;
3439
34ba94ba 3440 set_page_dirty(page);
a1dd3c13 3441
95ae251f
EB		 3442 if (pos + copied > i_size_read(inode) &&
3443 !f2fs_verity_in_progress(inode))
fc9581c8 3444 f2fs_i_size_write(inode, pos + copied);
649d7df2 3445unlock_out:
3024c9a1 3446 f2fs_put_page(page, 1);
d0239e1b 3447 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
a1dd3c13
JK		 3448 return copied;
3449}
3450
6f673763
OS		 3451static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
3452 loff_t offset)
944fcfc1 3453{
8a56dd96
JK		 3454 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
3455 unsigned blkbits = i_blkbits;
3456 unsigned blocksize_mask = (1 << blkbits) - 1;
3457 unsigned long align = offset | iov_iter_alignment(iter);
3458 struct block_device *bdev = inode->i_sb->s_bdev;
3459
3460 if (align & blocksize_mask) {
3461 if (bdev)
3462 blkbits = blksize_bits(bdev_logical_block_size(bdev));
3463 blocksize_mask = (1 << blkbits) - 1;
3464 if (align & blocksize_mask)
3465 return -EINVAL;
3466 return 1;
3467 }
944fcfc1
JK		 3468 return 0;
3469}
3470
02b16d0a
CY		 3471static void f2fs_dio_end_io(struct bio *bio)
3472{
3473 struct f2fs_private_dio *dio = bio->bi_private;
3474
3475 dec_page_count(F2FS_I_SB(dio->inode),
3476 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3477
3478 bio->bi_private = dio->orig_private;
3479 bio->bi_end_io = dio->orig_end_io;
3480
5222595d 3481 kvfree(dio);
02b16d0a
CY		 3482
3483 bio_endio(bio);
3484}
3485
3486static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
3487 loff_t file_offset)
3488{
3489 struct f2fs_private_dio *dio;
3490 bool write = (bio_op(bio) == REQ_OP_WRITE);
02b16d0a
CY		 3491
3492 dio = f2fs_kzalloc(F2FS_I_SB(inode),
3493 sizeof(struct f2fs_private_dio), GFP_NOFS);
8e114038 3494 if (!dio)
02b16d0a 3495 goto out;
02b16d0a
CY		 3496
3497 dio->inode = inode;
3498 dio->orig_end_io = bio->bi_end_io;
3499 dio->orig_private = bio->bi_private;
3500 dio->write = write;
3501
3502 bio->bi_end_io = f2fs_dio_end_io;
3503 bio->bi_private = dio;
3504
3505 inc_page_count(F2FS_I_SB(inode),
3506 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3507
3508 submit_bio(bio);
3509 return;
3510out:
3511 bio->bi_status = BLK_STS_IOERR;
3512 bio_endio(bio);
3513}
3514
c8b8e32d 3515static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
eb47b800 3516{
b439b103 3517 struct address_space *mapping = iocb->ki_filp->f_mapping;
3aab8f82 3518 struct inode *inode = mapping->host;
0cdd3195 3519 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f847c699 3520 struct f2fs_inode_info *fi = F2FS_I(inode);
3aab8f82 3521 size_t count = iov_iter_count(iter);
c8b8e32d 3522 loff_t offset = iocb->ki_pos;
82e0a5aa 3523 int rw = iov_iter_rw(iter);
3aab8f82 3524 int err;
0cdd3195 3525 enum rw_hint hint = iocb->ki_hint;
63189b78 3526 int whint_mode = F2FS_OPTION(sbi).whint_mode;
f847c699 3527 bool do_opu;
944fcfc1 3528
b439b103 3529 err = check_direct_IO(inode, iter, offset);
b9d777b8 3530 if (err)
8a56dd96 3531 return err < 0 ? err : 0;
9ffe0fb5 3532
f847c699 3533 if (f2fs_force_buffered_io(inode, iocb, iter))
36abef4e 3534 return 0;
fcc85a4d 3535
f847c699
CY		 3536 do_opu = allow_outplace_dio(inode, iocb, iter);
3537
5302fb00 3538 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
70407fad 3539
0cdd3195
HL		 3540 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
3541 iocb->ki_hint = WRITE_LIFE_NOT_SET;
3542
f847c699
CY		 3543 if (iocb->ki_flags & IOCB_NOWAIT) {
3544 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
3545 iocb->ki_hint = hint;
3546 err = -EAGAIN;
3547 goto out;
3548 }
3549 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
3550 up_read(&fi->i_gc_rwsem[rw]);
b91050a8
HL		 3551 iocb->ki_hint = hint;
3552 err = -EAGAIN;
3553 goto out;
3554 }
f847c699
CY		 3555 } else {
3556 down_read(&fi->i_gc_rwsem[rw]);
3557 if (do_opu)
3558 down_read(&fi->i_gc_rwsem[READ]);
b91050a8
HL		 3559 }
3560
02b16d0a 3561 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
f9d6d059
CY		 3562 iter, rw == WRITE ? get_data_block_dio_write :
3563 get_data_block_dio, NULL, f2fs_dio_submit_bio,
ad8d6a02
D		 3564 rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
3565 DIO_SKIP_HOLES);
f847c699
CY		 3566
3567 if (do_opu)
3568 up_read(&fi->i_gc_rwsem[READ]);
3569
3570 up_read(&fi->i_gc_rwsem[rw]);
82e0a5aa
CY		 3571
3572 if (rw == WRITE) {
0cdd3195
HL		 3573 if (whint_mode == WHINT_MODE_OFF)
3574 iocb->ki_hint = hint;
b0af6d49
CY		 3575 if (err > 0) {
3576 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3577 err);
f847c699
CY		 3578 if (!do_opu)
3579 set_inode_flag(inode, FI_UPDATE_WRITE);
b0af6d49 3580 } else if (err < 0) {
6bfc4919 3581 f2fs_write_failed(mapping, offset + count);
b0af6d49 3582 }
8b83ac81
CY		 3583 } else {
3584 if (err > 0)
3585 f2fs_update_iostat(sbi, APP_DIRECT_READ_IO, err);
6bfc4919 3586 }
70407fad 3587
b91050a8 3588out:
5302fb00 3589 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
70407fad 3590
3aab8f82 3591 return err;
eb47b800
JK		 3592}
3593
487261f3
CY		 3594void f2fs_invalidate_page(struct page *page, unsigned int offset,
3595 unsigned int length)
eb47b800
JK		 3596{
3597 struct inode *inode = page->mapping->host;
487261f3 3598 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
a7ffdbe2 3599
487261f3 3600 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
09cbfeaf 3601 (offset % PAGE_SIZE || length != PAGE_SIZE))
a7ffdbe2
JK		 3602 return;
3603
487261f3 3604 if (PageDirty(page)) {
933439c8 3605 if (inode->i_ino == F2FS_META_INO(sbi)) {
487261f3 3606 dec_page_count(sbi, F2FS_DIRTY_META);
933439c8 3607 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
487261f3 3608 dec_page_count(sbi, F2FS_DIRTY_NODES);
933439c8 3609 } else {
487261f3 3610 inode_dec_dirty_pages(inode);
4d57b86d 3611 f2fs_remove_dirty_inode(inode);
933439c8 3612 }
487261f3 3613 }
decd36b6 3614
2baf0781
CY		 3615 clear_cold_data(page);
3616
decd36b6 3617 if (IS_ATOMIC_WRITTEN_PAGE(page))
4d57b86d 3618 return f2fs_drop_inmem_page(inode, page);
decd36b6 3619
240a5915 3620 f2fs_clear_page_private(page);
eb47b800
JK		 3621}
3622
487261f3 3623int f2fs_release_page(struct page *page, gfp_t wait)
eb47b800 3624{
f68daeeb
JK		 3625 /* If this is dirty page, keep PagePrivate */
3626 if (PageDirty(page))
3627 return 0;
3628
decd36b6
CY		 3629 /* This is atomic written page, keep Private */
3630 if (IS_ATOMIC_WRITTEN_PAGE(page))
3631 return 0;
3632
2baf0781 3633 clear_cold_data(page);
240a5915 3634 f2fs_clear_page_private(page);
c3850aa1 3635 return 1;
eb47b800
JK		 3636}
3637
3638static int f2fs_set_data_page_dirty(struct page *page)
3639{
4969c06a 3640 struct inode *inode = page_file_mapping(page)->host;
eb47b800 3641
26c6b887
JK		 3642 trace_f2fs_set_page_dirty(page, DATA);
3643
237c0790
JK		 3644 if (!PageUptodate(page))
3645 SetPageUptodate(page);
4969c06a
JK		 3646 if (PageSwapCache(page))
3647 return __set_page_dirty_nobuffers(page);
34ba94ba 3648
5fe45743 3649 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
decd36b6 3650 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
4d57b86d 3651 f2fs_register_inmem_page(inode, page);
decd36b6
CY		 3652 return 1;
3653 }
3654 /*
3655 * Previously, this page has been registered, we just
3656 * return here.
3657 */
3658 return 0;
34ba94ba
JK		 3659 }
3660
eb47b800 3661 if (!PageDirty(page)) {
b87078ad 3662 __set_page_dirty_nobuffers(page);
4d57b86d 3663 f2fs_update_dirty_page(inode, page);
eb47b800
JK		 3664 return 1;
3665 }
3666 return 0;
3667}
3668
c01e54b7
JK		 3669static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3670{
454ae7e5
CY		 3671 struct inode *inode = mapping->host;
3672
1d373a0e
JK		 3673 if (f2fs_has_inline_data(inode))
3674 return 0;
3675
3676 /* make sure allocating whole blocks */
3677 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3678 filemap_write_and_wait(mapping);
3679
e2b4e2bc 3680 return generic_block_bmap(mapping, block, get_data_block_bmap);
429511cd
CY		 3681}
3682
5b7a487c
WG		 3683#ifdef CONFIG_MIGRATION
3684#include <linux/migrate.h>
3685
3686int f2fs_migrate_page(struct address_space *mapping,
3687 struct page *newpage, struct page *page, enum migrate_mode mode)
3688{
3689 int rc, extra_count;
3690 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3691 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
3692
3693 BUG_ON(PageWriteback(page));
3694
3695 /* migrating an atomic written page is safe with the inmem_lock hold */
ff1048e7
JK		 3696 if (atomic_written) {
3697 if (mode != MIGRATE_SYNC)
3698 return -EBUSY;
3699 if (!mutex_trylock(&fi->inmem_lock))
3700 return -EAGAIN;
3701 }
5b7a487c 3702
240a5915
CY		 3703 /* one extra reference was held for atomic_write page */
3704 extra_count = atomic_written ? 1 : 0;
5b7a487c 3705 rc = migrate_page_move_mapping(mapping, newpage,
37109694 3706 page, extra_count);
5b7a487c
WG		 3707 if (rc != MIGRATEPAGE_SUCCESS) {
3708 if (atomic_written)
3709 mutex_unlock(&fi->inmem_lock);
3710 return rc;
3711 }
3712
3713 if (atomic_written) {
3714 struct inmem_pages *cur;
3715 list_for_each_entry(cur, &fi->inmem_pages, list)
3716 if (cur->page == page) {
3717 cur->page = newpage;
3718 break;
3719 }
3720 mutex_unlock(&fi->inmem_lock);
3721 put_page(page);
3722 get_page(newpage);
3723 }
3724
240a5915
CY		 3725 if (PagePrivate(page)) {
3726 f2fs_set_page_private(newpage, page_private(page));
3727 f2fs_clear_page_private(page);
3728 }
5b7a487c 3729
2916ecc0
JG		 3730 if (mode != MIGRATE_SYNC_NO_COPY)
3731 migrate_page_copy(newpage, page);
3732 else
3733 migrate_page_states(newpage, page);
5b7a487c
WG		 3734
3735 return MIGRATEPAGE_SUCCESS;
3736}
3737#endif
3738
4969c06a
JK		 3739#ifdef CONFIG_SWAP
3740/* Copied from generic_swapfile_activate() to check any holes */
3e5e479a
CY		 3741static int check_swap_activate(struct swap_info_struct *sis,
3742 struct file *swap_file, sector_t *span)
4969c06a
JK		 3743{
3744 struct address_space *mapping = swap_file->f_mapping;
3745 struct inode *inode = mapping->host;
3746 unsigned blocks_per_page;
3747 unsigned long page_no;
3748 unsigned blkbits;
3749 sector_t probe_block;
3750 sector_t last_block;
3751 sector_t lowest_block = -1;
3752 sector_t highest_block = 0;
3e5e479a
CY		 3753 int nr_extents = 0;
3754 int ret;
4969c06a
JK		 3755
3756 blkbits = inode->i_blkbits;
3757 blocks_per_page = PAGE_SIZE >> blkbits;
3758
3759 /*
3760 * Map all the blocks into the extent list. This code doesn't try
3761 * to be very smart.
3762 */
3763 probe_block = 0;
3764 page_no = 0;
3765 last_block = i_size_read(inode) >> blkbits;
3e5e479a
CY		 3766 while ((probe_block + blocks_per_page) <= last_block &&
3767 page_no < sis->max) {
4969c06a
JK		 3768 unsigned block_in_page;
3769 sector_t first_block;
30460e1e
CM		 3770 sector_t block = 0;
3771 int err = 0;
4969c06a
JK		 3772
3773 cond_resched();
3774
30460e1e
CM		 3775 block = probe_block;
3776 err = bmap(inode, &block);
3777 if (err || !block)
4969c06a 3778 goto bad_bmap;
30460e1e 3779 first_block = block;
4969c06a
JK		 3780
3781 /*
3782 * It must be PAGE_SIZE aligned on-disk
3783 */
3784 if (first_block & (blocks_per_page - 1)) {
3785 probe_block++;
3786 goto reprobe;
3787 }
3788
3789 for (block_in_page = 1; block_in_page < blocks_per_page;
3790 block_in_page++) {
4969c06a 3791
30460e1e
CM		 3792 block = probe_block + block_in_page;
3793 err = bmap(inode, &block);
3794
3795 if (err || !block)
4969c06a 3796 goto bad_bmap;
30460e1e 3797
4969c06a
JK		 3798 if (block != first_block + block_in_page) {
3799 /* Discontiguity */
3800 probe_block++;
3801 goto reprobe;
3802 }
3803 }
3804
3805 first_block >>= (PAGE_SHIFT - blkbits);
3806 if (page_no) { /* exclude the header page */
3807 if (first_block < lowest_block)
3808 lowest_block = first_block;
3809 if (first_block > highest_block)
3810 highest_block = first_block;
3811 }
3812
3e5e479a
CY		 3813 /*
3814 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3815 */
3816 ret = add_swap_extent(sis, page_no, 1, first_block);
3817 if (ret < 0)
3818 goto out;
3819 nr_extents += ret;
4969c06a
JK		 3820 page_no++;
3821 probe_block += blocks_per_page;
3822reprobe:
3823 continue;
3824 }
3e5e479a
CY		 3825 ret = nr_extents;
3826 *span = 1 + highest_block - lowest_block;
3827 if (page_no == 0)
3828 page_no = 1; /* force Empty message */
3829 sis->max = page_no;
3830 sis->pages = page_no - 1;
3831 sis->highest_bit = page_no - 1;
3832out:
3833 return ret;
4969c06a
JK		 3834bad_bmap:
3835 pr_err("swapon: swapfile has holes\n");
3836 return -EINVAL;
3837}
3838
3839static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3840 sector_t *span)
3841{
3842 struct inode *inode = file_inode(file);
3843 int ret;
3844
3845 if (!S_ISREG(inode->i_mode))
3846 return -EINVAL;
3847
3848 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3849 return -EROFS;
3850
3851 ret = f2fs_convert_inline_inode(inode);
3852 if (ret)
3853 return ret;
3854
4c8ff709
CY		 3855 if (f2fs_disable_compressed_file(inode))
3856 return -EINVAL;
3857
3e5e479a
CY		 3858 ret = check_swap_activate(sis, file, span);
3859 if (ret < 0)
4969c06a
JK		 3860 return ret;
3861
3862 set_inode_flag(inode, FI_PIN_FILE);
3863 f2fs_precache_extents(inode);
3864 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3e5e479a 3865 return ret;
4969c06a
JK		 3866}
3867
3868static void f2fs_swap_deactivate(struct file *file)
3869{
3870 struct inode *inode = file_inode(file);
3871
3872 clear_inode_flag(inode, FI_PIN_FILE);
3873}
3874#else
3875static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3876 sector_t *span)
3877{
3878 return -EOPNOTSUPP;
3879}
3880
3881static void f2fs_swap_deactivate(struct file *file)
3882{
3883}
3884#endif
3885
eb47b800
JK		 3886const struct address_space_operations f2fs_dblock_aops = {
3887 .readpage = f2fs_read_data_page,
3888 .readpages = f2fs_read_data_pages,
3889 .writepage = f2fs_write_data_page,
3890 .writepages = f2fs_write_data_pages,
3891 .write_begin = f2fs_write_begin,
a1dd3c13 3892 .write_end = f2fs_write_end,
eb47b800 3893 .set_page_dirty = f2fs_set_data_page_dirty,
487261f3
CY		 3894 .invalidatepage = f2fs_invalidate_page,
3895 .releasepage = f2fs_release_page,
eb47b800 3896 .direct_IO = f2fs_direct_IO,
c01e54b7 3897 .bmap = f2fs_bmap,
4969c06a
JK		 3898 .swap_activate = f2fs_swap_activate,
3899 .swap_deactivate = f2fs_swap_deactivate,
5b7a487c
WG		 3900#ifdef CONFIG_MIGRATION
3901 .migratepage = f2fs_migrate_page,
3902#endif
eb47b800 3903};
6dbb1796 3904
5ec2d99d 3905void f2fs_clear_page_cache_dirty_tag(struct page *page)
aec2f729
CY		 3906{
3907 struct address_space *mapping = page_mapping(page);
3908 unsigned long flags;
3909
3910 xa_lock_irqsave(&mapping->i_pages, flags);
5ec2d99d 3911 __xa_clear_mark(&mapping->i_pages, page_index(page),
aec2f729
CY		 3912 PAGECACHE_TAG_DIRTY);
3913 xa_unlock_irqrestore(&mapping->i_pages, flags);
3914}
3915
6dbb1796
EB		 3916int __init f2fs_init_post_read_processing(void)
3917{
95ae251f
EB		 3918 bio_post_read_ctx_cache =
3919 kmem_cache_create("f2fs_bio_post_read_ctx",
3920 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
6dbb1796
EB		 3921 if (!bio_post_read_ctx_cache)
3922 goto fail;
3923 bio_post_read_ctx_pool =
3924 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3925 bio_post_read_ctx_cache);
3926 if (!bio_post_read_ctx_pool)
3927 goto fail_free_cache;
3928 return 0;
3929
3930fail_free_cache:
3931 kmem_cache_destroy(bio_post_read_ctx_cache);
3932fail:
3933 return -ENOMEM;
3934}
3935
0b20fcec 3936void f2fs_destroy_post_read_processing(void)
6dbb1796
EB		 3937{
3938 mempool_destroy(bio_post_read_ctx_pool);
3939 kmem_cache_destroy(bio_post_read_ctx_cache);
3940}
0b20fcec 3941
4c8ff709
CY		 3942int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
3943{
3944 if (!f2fs_sb_has_encrypt(sbi) &&
3945 !f2fs_sb_has_verity(sbi) &&
3946 !f2fs_sb_has_compression(sbi))
3947 return 0;
3948
3949 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
3950 WQ_UNBOUND | WQ_HIGHPRI,
3951 num_online_cpus());
3952 if (!sbi->post_read_wq)
3953 return -ENOMEM;
3954 return 0;
3955}
3956
3957void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
3958{
3959 if (sbi->post_read_wq)
3960 destroy_workqueue(sbi->post_read_wq);
3961}
3962
0b20fcec
CY		 3963int __init f2fs_init_bio_entry_cache(void)
3964{
98510003 3965 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
0b20fcec
CY		 3966 sizeof(struct bio_entry));
3967 if (!bio_entry_slab)
3968 return -ENOMEM;
3969 return 0;
3970}
3971
f543805f 3972void f2fs_destroy_bio_entry_cache(void)
0b20fcec
CY		 3973{
3974 kmem_cache_destroy(bio_entry_slab);
3975}
Michael's Linux tree.