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f2fs: convert from readpages to readahead
[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
458e6197 516static void __submit_merged_bio(struct f2fs_bio_info *io)
93dfe2ac 517{
458e6197 518 struct f2fs_io_info *fio = &io->fio;
93dfe2ac
JK		 519
520 if (!io->bio)
521 return;
522
554b5125
JK		 523 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
524
04d328de 525 if (is_read_io(fio->op))
554b5125 526 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
6a8f8ca5 527 else
554b5125 528 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
04d328de 529
4fc29c1a 530 __submit_bio(io->sbi, io->bio, fio->type);
93dfe2ac
JK		 531 io->bio = NULL;
532}
533
8648de2c 534static bool __has_merged_page(struct bio *bio, struct inode *inode,
bab475c5 535 struct page *page, nid_t ino)
0fd785eb 536{
0fd785eb 537 struct bio_vec *bvec;
6dc4f100 538 struct bvec_iter_all iter_all;
0fd785eb 539
8648de2c 540 if (!bio)
0fd785eb 541 return false;
0c3a5797 542
bab475c5 543 if (!inode && !page && !ino)
0c3a5797 544 return true;
0fd785eb 545
8648de2c 546 bio_for_each_segment_all(bvec, bio, iter_all) {
4c8ff709 547 struct page *target = bvec->bv_page;
0fd785eb 548
4c8ff709 549 if (fscrypt_is_bounce_page(target)) {
d2d0727b 550 target = fscrypt_pagecache_page(target);
4c8ff709
CY		 551 if (IS_ERR(target))
552 continue;
553 }
554 if (f2fs_is_compressed_page(target)) {
555 target = f2fs_compress_control_page(target);
556 if (IS_ERR(target))
557 continue;
558 }
0fd785eb 559
0c3a5797
CY		 560 if (inode && inode == target->mapping->host)
561 return true;
bab475c5
CY		 562 if (page && page == target)
563 return true;
0c3a5797 564 if (ino && ino == ino_of_node(target))
0fd785eb 565 return true;
0fd785eb
CY		 566 }
567
0fd785eb
CY		 568 return false;
569}
570
b9109b0e 571static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
a912b54d 572 enum page_type type, enum temp_type temp)
93dfe2ac
JK		 573{
574 enum page_type btype = PAGE_TYPE_OF_BIO(type);
a912b54d 575 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
93dfe2ac 576
df0f8dc0 577 down_write(&io->io_rwsem);
458e6197
JK		 578
579 /* change META to META_FLUSH in the checkpoint procedure */
580 if (type >= META_FLUSH) {
581 io->fio.type = META_FLUSH;
04d328de 582 io->fio.op = REQ_OP_WRITE;
3adc5fcb 583 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
70fd7614 584 if (!test_opt(sbi, NOBARRIER))
7f54f51f 585 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
458e6197
JK		 586 }
587 __submit_merged_bio(io);
df0f8dc0 588 up_write(&io->io_rwsem);
93dfe2ac
JK		 589}
590
a912b54d 591static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 592 struct inode *inode, struct page *page,
593 nid_t ino, enum page_type type, bool force)
0c3a5797 594{
a912b54d 595 enum temp_type temp;
1e771e83 596 bool ret = true;
a912b54d
JK		 597
598 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
1e771e83
YS		 599 if (!force) {
600 enum page_type btype = PAGE_TYPE_OF_BIO(type);
601 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
a912b54d 602
1e771e83 603 down_read(&io->io_rwsem);
8648de2c 604 ret = __has_merged_page(io->bio, inode, page, ino);
1e771e83
YS		 605 up_read(&io->io_rwsem);
606 }
607 if (ret)
608 __f2fs_submit_merged_write(sbi, type, temp);
a912b54d
JK		 609
610 /* TODO: use HOT temp only for meta pages now. */
611 if (type >= META)
612 break;
613 }
0c3a5797
CY		 614}
615
b9109b0e 616void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
0c3a5797 617{
adcc00f7 618 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
0c3a5797
CY		 619}
620
b9109b0e 621void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 622 struct inode *inode, struct page *page,
623 nid_t ino, enum page_type type)
0c3a5797 624{
bab475c5 625 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
0c3a5797
CY		 626}
627
b9109b0e 628void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
406657dd 629{
b9109b0e
JK		 630 f2fs_submit_merged_write(sbi, DATA);
631 f2fs_submit_merged_write(sbi, NODE);
632 f2fs_submit_merged_write(sbi, META);
406657dd
CY		 633}
634
93dfe2ac
JK		 635/*
636 * Fill the locked page with data located in the block address.
771a9a71 637 * A caller needs to unlock the page on failure.
93dfe2ac 638 */
05ca3632 639int f2fs_submit_page_bio(struct f2fs_io_info *fio)
93dfe2ac 640{
93dfe2ac 641 struct bio *bio;
0b81d077
JK		 642 struct page *page = fio->encrypted_page ?
643 fio->encrypted_page : fio->page;
93dfe2ac 644
c9b60788 645 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
93770ab7
CY		 646 fio->is_por ? META_POR : (__is_meta_io(fio) ?
647 META_GENERIC : DATA_GENERIC_ENHANCE)))
10f966bb 648 return -EFSCORRUPTED;
c9b60788 649
2ace38e0 650 trace_f2fs_submit_page_bio(page, fio);
05ca3632 651 f2fs_trace_ios(fio, 0);
93dfe2ac
JK		 652
653 /* Allocate a new bio */
b757f6ed 654 bio = __bio_alloc(fio, 1);
93dfe2ac 655
09cbfeaf 656 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
93dfe2ac 657 bio_put(bio);
93dfe2ac
JK		 658 return -EFAULT;
659 }
78efac53
CY		 660
661 if (fio->io_wbc && !is_read_io(fio->op))
34e51a5e 662 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
78efac53 663
04d328de 664 bio_set_op_attrs(bio, fio->op, fio->op_flags);
93dfe2ac 665
5f9abab4
JK		 666 inc_page_count(fio->sbi, is_read_io(fio->op) ?
667 __read_io_type(page): WB_DATA_TYPE(fio->page));
4c58ed07
CY		 668
669 __submit_bio(fio->sbi, bio, fio->type);
93dfe2ac
JK		 670 return 0;
671}
672
8896cbdf
CY		 673static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
674 block_t last_blkaddr, block_t cur_blkaddr)
675{
676 if (last_blkaddr + 1 != cur_blkaddr)
677 return false;
678 return __same_bdev(sbi, cur_blkaddr, bio);
679}
680
681static bool io_type_is_mergeable(struct f2fs_bio_info *io,
682 struct f2fs_io_info *fio)
683{
684 if (io->fio.op != fio->op)
685 return false;
686 return io->fio.op_flags == fio->op_flags;
687}
688
689static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
690 struct f2fs_bio_info *io,
691 struct f2fs_io_info *fio,
692 block_t last_blkaddr,
693 block_t cur_blkaddr)
694{
c72db71e
CY		 695 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
696 unsigned int filled_blocks =
697 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
698 unsigned int io_size = F2FS_IO_SIZE(sbi);
699 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
700
701 /* IOs in bio is aligned and left space of vectors is not enough */
702 if (!(filled_blocks % io_size) && left_vecs < io_size)
703 return false;
704 }
8896cbdf
CY		 705 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
706 return false;
707 return io_type_is_mergeable(io, fio);
708}
709
0b20fcec
CY		 710static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
711 struct page *page, enum temp_type temp)
712{
713 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
714 struct bio_entry *be;
715
716 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
717 be->bio = bio;
718 bio_get(bio);
719
720 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
721 f2fs_bug_on(sbi, 1);
722
723 down_write(&io->bio_list_lock);
724 list_add_tail(&be->list, &io->bio_list);
725 up_write(&io->bio_list_lock);
726}
727
728static void del_bio_entry(struct bio_entry *be)
729{
730 list_del(&be->list);
731 kmem_cache_free(bio_entry_slab, be);
732}
733
734static int add_ipu_page(struct f2fs_sb_info *sbi, struct bio **bio,
735 struct page *page)
736{
737 enum temp_type temp;
738 bool found = false;
739 int ret = -EAGAIN;
740
741 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
742 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
743 struct list_head *head = &io->bio_list;
744 struct bio_entry *be;
745
746 down_write(&io->bio_list_lock);
747 list_for_each_entry(be, head, list) {
748 if (be->bio != *bio)
749 continue;
750
751 found = true;
752
4c8ff709
CY		 753 if (bio_add_page(*bio, page, PAGE_SIZE, 0) ==
754 PAGE_SIZE) {
0b20fcec
CY		 755 ret = 0;
756 break;
757 }
758
759 /* bio is full */
760 del_bio_entry(be);
761 __submit_bio(sbi, *bio, DATA);
762 break;
763 }
764 up_write(&io->bio_list_lock);
765 }
766
767 if (ret) {
768 bio_put(*bio);
769 *bio = NULL;
770 }
771
772 return ret;
773}
774
775void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
776 struct bio **bio, struct page *page)
777{
778 enum temp_type temp;
779 bool found = false;
780 struct bio *target = bio ? *bio : NULL;
781
782 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
783 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
784 struct list_head *head = &io->bio_list;
785 struct bio_entry *be;
786
787 if (list_empty(head))
788 continue;
789
790 down_read(&io->bio_list_lock);
791 list_for_each_entry(be, head, list) {
792 if (target)
793 found = (target == be->bio);
794 else
795 found = __has_merged_page(be->bio, NULL,
796 page, 0);
797 if (found)
798 break;
799 }
800 up_read(&io->bio_list_lock);
801
802 if (!found)
803 continue;
804
805 found = false;
806
807 down_write(&io->bio_list_lock);
808 list_for_each_entry(be, head, list) {
809 if (target)
810 found = (target == be->bio);
811 else
812 found = __has_merged_page(be->bio, NULL,
813 page, 0);
814 if (found) {
815 target = be->bio;
816 del_bio_entry(be);
817 break;
818 }
819 }
820 up_write(&io->bio_list_lock);
821 }
822
823 if (found)
824 __submit_bio(sbi, target, DATA);
825 if (bio && *bio) {
826 bio_put(*bio);
827 *bio = NULL;
828 }
829}
830
8648de2c
CY		 831int f2fs_merge_page_bio(struct f2fs_io_info *fio)
832{
833 struct bio *bio = *fio->bio;
834 struct page *page = fio->encrypted_page ?
835 fio->encrypted_page : fio->page;
836
837 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
838 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
10f966bb 839 return -EFSCORRUPTED;
8648de2c
CY		 840
841 trace_f2fs_submit_page_bio(page, fio);
842 f2fs_trace_ios(fio, 0);
843
8896cbdf 844 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
0b20fcec
CY		 845 fio->new_blkaddr))
846 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
8648de2c
CY		 847alloc_new:
848 if (!bio) {
b757f6ed 849 bio = __bio_alloc(fio, BIO_MAX_PAGES);
8648de2c 850 bio_set_op_attrs(bio, fio->op, fio->op_flags);
8648de2c 851
0b20fcec
CY		 852 add_bio_entry(fio->sbi, bio, page, fio->temp);
853 } else {
854 if (add_ipu_page(fio->sbi, &bio, page))
855 goto alloc_new;
8648de2c
CY		 856 }
857
858 if (fio->io_wbc)
9637d517 859 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
8648de2c
CY		 860
861 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
862
863 *fio->last_block = fio->new_blkaddr;
864 *fio->bio = bio;
865
866 return 0;
867}
868
fe16efe6 869void f2fs_submit_page_write(struct f2fs_io_info *fio)
93dfe2ac 870{
05ca3632 871 struct f2fs_sb_info *sbi = fio->sbi;
458e6197 872 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
a912b54d 873 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
4375a336 874 struct page *bio_page;
93dfe2ac 875
b9109b0e 876 f2fs_bug_on(sbi, is_read_io(fio->op));
93dfe2ac 877
fb830fc5
CY		 878 down_write(&io->io_rwsem);
879next:
880 if (fio->in_list) {
881 spin_lock(&io->io_lock);
882 if (list_empty(&io->io_list)) {
883 spin_unlock(&io->io_lock);
fe16efe6 884 goto out;
fb830fc5
CY		 885 }
886 fio = list_first_entry(&io->io_list,
887 struct f2fs_io_info, list);
888 list_del(&fio->list);
889 spin_unlock(&io->io_lock);
890 }
93dfe2ac 891
93770ab7 892 verify_fio_blkaddr(fio);
93dfe2ac 893
4c8ff709
CY		 894 if (fio->encrypted_page)
895 bio_page = fio->encrypted_page;
896 else if (fio->compressed_page)
897 bio_page = fio->compressed_page;
898 else
899 bio_page = fio->page;
36951b38 900
ebf7c522
TM		 901 /* set submitted = true as a return value */
902 fio->submitted = true;
d68f735b 903
b9109b0e 904 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
93dfe2ac 905
8896cbdf
CY		 906 if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio,
907 io->last_block_in_bio, fio->new_blkaddr))
458e6197 908 __submit_merged_bio(io);
93dfe2ac
JK		 909alloc_new:
910 if (io->bio == NULL) {
8223ecc4
CY		 911 if (F2FS_IO_ALIGNED(sbi) &&
912 (fio->type == DATA || fio->type == NODE) &&
0a595eba 913 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
b9109b0e 914 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
fe16efe6
CY		 915 fio->retry = true;
916 goto skip;
0a595eba 917 }
b757f6ed 918 io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
458e6197 919 io->fio = *fio;
93dfe2ac
JK		 920 }
921
a912b54d 922 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
458e6197 923 __submit_merged_bio(io);
93dfe2ac
JK		 924 goto alloc_new;
925 }
926
578c6478 927 if (fio->io_wbc)
34e51a5e 928 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
578c6478 929
7a9d7548 930 io->last_block_in_bio = fio->new_blkaddr;
05ca3632 931 f2fs_trace_ios(fio, 0);
fb830fc5
CY		 932
933 trace_f2fs_submit_page_write(fio->page, fio);
fe16efe6 934skip:
fb830fc5
CY		 935 if (fio->in_list)
936 goto next;
fe16efe6 937out:
4354994f 938 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
00e09c0b 939 !f2fs_is_checkpoint_ready(sbi))
5ce80586 940 __submit_merged_bio(io);
df0f8dc0 941 up_write(&io->io_rwsem);
93dfe2ac
JK		 942}
943
95ae251f
EB		 944static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
945{
946 return fsverity_active(inode) &&
947 idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
948}
949
13ba41e3 950static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
95ae251f 951 unsigned nr_pages, unsigned op_flag,
0683728a 952 pgoff_t first_idx, bool for_write)
13ba41e3
JK		 953{
954 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ba41e3 955 struct bio *bio;
6dbb1796
EB		 956 struct bio_post_read_ctx *ctx;
957 unsigned int post_read_steps = 0;
13ba41e3 958
0683728a
CY		 959 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES),
960 for_write);
6dbb1796 961 if (!bio)
13ba41e3 962 return ERR_PTR(-ENOMEM);
13ba41e3
JK		 963 f2fs_target_device(sbi, blkaddr, bio);
964 bio->bi_end_io = f2fs_read_end_io;
e2e59414 965 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
13ba41e3 966
6dbb1796
EB		 967 if (f2fs_encrypted_file(inode))
968 post_read_steps |= 1 << STEP_DECRYPT;
4c8ff709
CY		 969 if (f2fs_compressed_file(inode))
970 post_read_steps |= 1 << STEP_DECOMPRESS;
95ae251f
EB		 971 if (f2fs_need_verity(inode, first_idx))
972 post_read_steps |= 1 << STEP_VERITY;
973
6dbb1796 974 if (post_read_steps) {
e8ce5749 975 /* Due to the mempool, this never fails. */
6dbb1796 976 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
6dbb1796 977 ctx->bio = bio;
4c8ff709 978 ctx->sbi = sbi;
6dbb1796
EB		 979 ctx->enabled_steps = post_read_steps;
980 bio->bi_private = ctx;
6dbb1796
EB		 981 }
982
13ba41e3
JK		 983 return bio;
984}
985
4c8ff709
CY		 986static void f2fs_release_read_bio(struct bio *bio)
987{
988 if (bio->bi_private)
989 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
990 bio_put(bio);
991}
992
13ba41e3
JK		 993/* This can handle encryption stuffs */
994static int f2fs_submit_page_read(struct inode *inode, struct page *page,
0683728a 995 block_t blkaddr, bool for_write)
13ba41e3 996{
93770ab7
CY		 997 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
998 struct bio *bio;
13ba41e3 999
0683728a 1000 bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index, for_write);
13ba41e3
JK		 1001 if (IS_ERR(bio))
1002 return PTR_ERR(bio);
1003
0ded69f6
JK		 1004 /* wait for GCed page writeback via META_MAPPING */
1005 f2fs_wait_on_block_writeback(inode, blkaddr);
1006
13ba41e3
JK		 1007 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1008 bio_put(bio);
1009 return -EFAULT;
1010 }
fb7d70db 1011 ClearPageError(page);
93770ab7
CY		 1012 inc_page_count(sbi, F2FS_RD_DATA);
1013 __submit_bio(sbi, bio, DATA);
13ba41e3
JK		 1014 return 0;
1015}
1016
46008c6d
CY		 1017static void __set_data_blkaddr(struct dnode_of_data *dn)
1018{
1019 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
1020 __le32 *addr_array;
7a2af766
CY		 1021 int base = 0;
1022
1023 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
1024 base = get_extra_isize(dn->inode);
46008c6d
CY		 1025
1026 /* Get physical address of data block */
1027 addr_array = blkaddr_in_node(rn);
7a2af766 1028 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
46008c6d
CY		 1029}
1030
0a8165d7 1031/*
eb47b800
JK		 1032 * Lock ordering for the change of data block address:
1033 * ->data_page
1034 * ->node_page
1035 * update block addresses in the node page
1036 */
4d57b86d 1037void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
eb47b800 1038{
bae0ee7a 1039 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1040 __set_data_blkaddr(dn);
1041 if (set_page_dirty(dn->node_page))
12719ae1 1042 dn->node_changed = true;
eb47b800
JK		 1043}
1044
f28b3434
CY		 1045void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
1046{
1047 dn->data_blkaddr = blkaddr;
4d57b86d 1048 f2fs_set_data_blkaddr(dn);
f28b3434
CY		 1049 f2fs_update_extent_cache(dn);
1050}
1051
46008c6d 1052/* dn->ofs_in_node will be returned with up-to-date last block pointer */
4d57b86d 1053int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
eb47b800 1054{
4081363f 1055 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
0abd675e 1056 int err;
eb47b800 1057
46008c6d
CY		 1058 if (!count)
1059 return 0;
1060
91942321 1061 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
eb47b800 1062 return -EPERM;
0abd675e
CY		 1063 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1064 return err;
eb47b800 1065
46008c6d
CY		 1066 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
1067 dn->ofs_in_node, count);
1068
bae0ee7a 1069 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1070
1071 for (; count > 0; dn->ofs_in_node++) {
a2ced1ce 1072 block_t blkaddr = f2fs_data_blkaddr(dn);
46008c6d
CY		 1073 if (blkaddr == NULL_ADDR) {
1074 dn->data_blkaddr = NEW_ADDR;
1075 __set_data_blkaddr(dn);
1076 count--;
1077 }
1078 }
1079
1080 if (set_page_dirty(dn->node_page))
1081 dn->node_changed = true;
eb47b800
JK		 1082 return 0;
1083}
1084
46008c6d 1085/* Should keep dn->ofs_in_node unchanged */
4d57b86d 1086int f2fs_reserve_new_block(struct dnode_of_data *dn)
46008c6d
CY		 1087{
1088 unsigned int ofs_in_node = dn->ofs_in_node;
1089 int ret;
1090
4d57b86d 1091 ret = f2fs_reserve_new_blocks(dn, 1);
46008c6d
CY		 1092 dn->ofs_in_node = ofs_in_node;
1093 return ret;
1094}
1095
b600965c
HL		 1096int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
1097{
1098 bool need_put = dn->inode_page ? false : true;
1099 int err;
1100
4d57b86d 1101 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
b600965c
HL		 1102 if (err)
1103 return err;
a8865372 1104
b600965c 1105 if (dn->data_blkaddr == NULL_ADDR)
4d57b86d 1106 err = f2fs_reserve_new_block(dn);
a8865372 1107 if (err || need_put)
b600965c
HL		 1108 f2fs_put_dnode(dn);
1109 return err;
1110}
1111
759af1c9 1112int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
eb47b800 1113{
e15882b6 1114 struct extent_info ei = {0,0,0};
759af1c9 1115 struct inode *inode = dn->inode;
028a41e8 1116
759af1c9
FL		 1117 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1118 dn->data_blkaddr = ei.blk + index - ei.fofs;
1119 return 0;
429511cd 1120 }
028a41e8 1121
759af1c9 1122 return f2fs_reserve_block(dn, index);
eb47b800
JK		 1123}
1124
4d57b86d 1125struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
04d328de 1126 int op_flags, bool for_write)
eb47b800 1127{
eb47b800
JK		 1128 struct address_space *mapping = inode->i_mapping;
1129 struct dnode_of_data dn;
1130 struct page *page;
e15882b6 1131 struct extent_info ei = {0,0,0};
eb47b800 1132 int err;
4375a336 1133
a56c7c6f 1134 page = f2fs_grab_cache_page(mapping, index, for_write);
650495de
JK		 1135 if (!page)
1136 return ERR_PTR(-ENOMEM);
1137
cb3bc9ee
CY		 1138 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1139 dn.data_blkaddr = ei.blk + index - ei.fofs;
93770ab7
CY		 1140 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1141 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1142 err = -EFSCORRUPTED;
93770ab7
CY		 1143 goto put_err;
1144 }
cb3bc9ee
CY		 1145 goto got_it;
1146 }
1147
eb47b800 1148 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1149 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
86531d6b
JK		 1150 if (err)
1151 goto put_err;
eb47b800
JK		 1152 f2fs_put_dnode(&dn);
1153
6bacf52f 1154 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
86531d6b
JK		 1155 err = -ENOENT;
1156 goto put_err;
650495de 1157 }
93770ab7
CY		 1158 if (dn.data_blkaddr != NEW_ADDR &&
1159 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1160 dn.data_blkaddr,
1161 DATA_GENERIC_ENHANCE)) {
10f966bb 1162 err = -EFSCORRUPTED;
93770ab7
CY		 1163 goto put_err;
1164 }
cb3bc9ee 1165got_it:
43f3eae1
JK		 1166 if (PageUptodate(page)) {
1167 unlock_page(page);
eb47b800 1168 return page;
43f3eae1 1169 }
eb47b800 1170
d59ff4df
JK		 1171 /*
1172 * A new dentry page is allocated but not able to be written, since its
1173 * new inode page couldn't be allocated due to -ENOSPC.
1174 * In such the case, its blkaddr can be remained as NEW_ADDR.
4d57b86d
CY		 1175 * see, f2fs_add_link -> f2fs_get_new_data_page ->
1176 * f2fs_init_inode_metadata.
d59ff4df
JK		 1177 */
1178 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1179 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1180 if (!PageUptodate(page))
1181 SetPageUptodate(page);
43f3eae1 1182 unlock_page(page);
d59ff4df
JK		 1183 return page;
1184 }
eb47b800 1185
0683728a 1186 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr, for_write);
393ff91f 1187 if (err)
86531d6b 1188 goto put_err;
43f3eae1 1189 return page;
86531d6b
JK		 1190
1191put_err:
1192 f2fs_put_page(page, 1);
1193 return ERR_PTR(err);
43f3eae1
JK		 1194}
1195
4d57b86d 1196struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
43f3eae1
JK		 1197{
1198 struct address_space *mapping = inode->i_mapping;
1199 struct page *page;
1200
1201 page = find_get_page(mapping, index);
1202 if (page && PageUptodate(page))
1203 return page;
1204 f2fs_put_page(page, 0);
1205
4d57b86d 1206 page = f2fs_get_read_data_page(inode, index, 0, false);
43f3eae1
JK		 1207 if (IS_ERR(page))
1208 return page;
1209
1210 if (PageUptodate(page))
1211 return page;
1212
1213 wait_on_page_locked(page);
1214 if (unlikely(!PageUptodate(page))) {
1215 f2fs_put_page(page, 0);
1216 return ERR_PTR(-EIO);
1217 }
1218 return page;
1219}
1220
1221/*
1222 * If it tries to access a hole, return an error.
1223 * Because, the callers, functions in dir.c and GC, should be able to know
1224 * whether this page exists or not.
1225 */
4d57b86d 1226struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
a56c7c6f 1227 bool for_write)
43f3eae1
JK		 1228{
1229 struct address_space *mapping = inode->i_mapping;
1230 struct page *page;
1231repeat:
4d57b86d 1232 page = f2fs_get_read_data_page(inode, index, 0, for_write);
43f3eae1
JK		 1233 if (IS_ERR(page))
1234 return page;
393ff91f 1235
43f3eae1 1236 /* wait for read completion */
393ff91f 1237 lock_page(page);
6bacf52f 1238 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 1239 f2fs_put_page(page, 1);
1240 goto repeat;
eb47b800 1241 }
1563ac75
CY		 1242 if (unlikely(!PageUptodate(page))) {
1243 f2fs_put_page(page, 1);
1244 return ERR_PTR(-EIO);
1245 }
eb47b800
JK		 1246 return page;
1247}
1248
0a8165d7 1249/*
eb47b800
JK		 1250 * Caller ensures that this data page is never allocated.
1251 * A new zero-filled data page is allocated in the page cache.
39936837 1252 *
4f4124d0
CY		 1253 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
1254 * f2fs_unlock_op().
470f00e9
CY		 1255 * Note that, ipage is set only by make_empty_dir, and if any error occur,
1256 * ipage should be released by this function.
eb47b800 1257 */
4d57b86d 1258struct page *f2fs_get_new_data_page(struct inode *inode,
a8865372 1259 struct page *ipage, pgoff_t index, bool new_i_size)
eb47b800 1260{
eb47b800
JK		 1261 struct address_space *mapping = inode->i_mapping;
1262 struct page *page;
1263 struct dnode_of_data dn;
1264 int err;
7612118a 1265
a56c7c6f 1266 page = f2fs_grab_cache_page(mapping, index, true);
470f00e9
CY		 1267 if (!page) {
1268 /*
1269 * before exiting, we should make sure ipage will be released
1270 * if any error occur.
1271 */
1272 f2fs_put_page(ipage, 1);
01f28610 1273 return ERR_PTR(-ENOMEM);
470f00e9 1274 }
eb47b800 1275
a8865372 1276 set_new_dnode(&dn, inode, ipage, NULL, 0);
b600965c 1277 err = f2fs_reserve_block(&dn, index);
01f28610
JK		 1278 if (err) {
1279 f2fs_put_page(page, 1);
eb47b800 1280 return ERR_PTR(err);
a8865372 1281 }
01f28610
JK		 1282 if (!ipage)
1283 f2fs_put_dnode(&dn);
eb47b800
JK		 1284
1285 if (PageUptodate(page))
01f28610 1286 goto got_it;
eb47b800
JK		 1287
1288 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1289 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1290 if (!PageUptodate(page))
1291 SetPageUptodate(page);
eb47b800 1292 } else {
4375a336 1293 f2fs_put_page(page, 1);
a8865372 1294
7612118a
JK		 1295 /* if ipage exists, blkaddr should be NEW_ADDR */
1296 f2fs_bug_on(F2FS_I_SB(inode), ipage);
4d57b86d 1297 page = f2fs_get_lock_data_page(inode, index, true);
4375a336 1298 if (IS_ERR(page))
7612118a 1299 return page;
eb47b800 1300 }
01f28610 1301got_it:
9edcdabf 1302 if (new_i_size && i_size_read(inode) <
ee6d182f 1303 ((loff_t)(index + 1) << PAGE_SHIFT))
fc9581c8 1304 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
eb47b800
JK		 1305 return page;
1306}
1307
d5097be5 1308static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
bfad7c2d 1309{
4081363f 1310 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
bfad7c2d 1311 struct f2fs_summary sum;
bfad7c2d 1312 struct node_info ni;
6aa58d8a 1313 block_t old_blkaddr;
46008c6d 1314 blkcnt_t count = 1;
0abd675e 1315 int err;
bfad7c2d 1316
91942321 1317 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
bfad7c2d 1318 return -EPERM;
df6136ef 1319
7735730d
CY		 1320 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1321 if (err)
1322 return err;
1323
a2ced1ce 1324 dn->data_blkaddr = f2fs_data_blkaddr(dn);
f847c699 1325 if (dn->data_blkaddr != NULL_ADDR)
df6136ef
CY		 1326 goto alloc;
1327
0abd675e
CY		 1328 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1329 return err;
bfad7c2d 1330
df6136ef 1331alloc:
bfad7c2d 1332 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
6aa58d8a
CY		 1333 old_blkaddr = dn->data_blkaddr;
1334 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
d5097be5 1335 &sum, seg_type, NULL, false);
6aa58d8a
CY		 1336 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1337 invalidate_mapping_pages(META_MAPPING(sbi),
1338 old_blkaddr, old_blkaddr);
86f35dc3 1339 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
bfad7c2d 1340
0a4daae5
JK		 1341 /*
1342 * i_size will be updated by direct_IO. Otherwise, we'll get stale
1343 * data from unwritten block via dio_read.
1344 */
bfad7c2d
JK		 1345 return 0;
1346}
1347
a7de6086 1348int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
59b802e5 1349{
b439b103 1350 struct inode *inode = file_inode(iocb->ki_filp);
5b8db7fa 1351 struct f2fs_map_blocks map;
d6d478a1 1352 int flag;
a7de6086 1353 int err = 0;
d6d478a1 1354 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
59b802e5 1355
0080c507 1356 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
dfd02e4d
CY		 1357 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1358 if (map.m_len > map.m_lblk)
1359 map.m_len -= map.m_lblk;
1360 else
1361 map.m_len = 0;
1362
da85985c 1363 map.m_next_pgofs = NULL;
c4020b2d 1364 map.m_next_extent = NULL;
d5097be5 1365 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1366 map.m_may_create = true;
2a340760 1367
d6d478a1 1368 if (direct_io) {
4d57b86d 1369 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
f847c699 1370 flag = f2fs_force_buffered_io(inode, iocb, from) ?
d6d478a1
CY		 1371 F2FS_GET_BLOCK_PRE_AIO :
1372 F2FS_GET_BLOCK_PRE_DIO;
1373 goto map_blocks;
d5097be5 1374 }
f2470371 1375 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
a7de6086
JK		 1376 err = f2fs_convert_inline_inode(inode);
1377 if (err)
1378 return err;
b439b103 1379 }
d6d478a1 1380 if (f2fs_has_inline_data(inode))
25006645 1381 return err;
d6d478a1
CY		 1382
1383 flag = F2FS_GET_BLOCK_PRE_AIO;
1384
1385map_blocks:
1386 err = f2fs_map_blocks(inode, &map, 1, flag);
1387 if (map.m_len > 0 && err == -ENOSPC) {
1388 if (!direct_io)
1389 set_inode_flag(inode, FI_NO_PREALLOC);
1390 err = 0;
25006645 1391 }
a7de6086 1392 return err;
59b802e5
JK		 1393}
1394
39a86958 1395void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
59c9081b
YH		 1396{
1397 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1398 if (lock)
1399 down_read(&sbi->node_change);
1400 else
1401 up_read(&sbi->node_change);
1402 } else {
1403 if (lock)
1404 f2fs_lock_op(sbi);
1405 else
1406 f2fs_unlock_op(sbi);
1407 }
1408}
1409
0a8165d7 1410/*
7a88ddb5
CY		 1411 * f2fs_map_blocks() tries to find or build mapping relationship which
1412 * maps continuous logical blocks to physical blocks, and return such
1413 * info via f2fs_map_blocks structure.
eb47b800 1414 */
d323d005 1415int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
e2b4e2bc 1416 int create, int flag)
eb47b800 1417{
003a3e1d 1418 unsigned int maxblocks = map->m_len;
eb47b800 1419 struct dnode_of_data dn;
f9811703 1420 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f9d6d059 1421 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
46008c6d 1422 pgoff_t pgofs, end_offset, end;
bfad7c2d 1423 int err = 0, ofs = 1;
46008c6d
CY		 1424 unsigned int ofs_in_node, last_ofs_in_node;
1425 blkcnt_t prealloc;
e15882b6 1426 struct extent_info ei = {0,0,0};
7df3a431 1427 block_t blkaddr;
c4020b2d 1428 unsigned int start_pgofs;
eb47b800 1429
dfd02e4d
CY		 1430 if (!maxblocks)
1431 return 0;
1432
003a3e1d
JK		 1433 map->m_len = 0;
1434 map->m_flags = 0;
1435
1436 /* it only supports block size == page size */
1437 pgofs = (pgoff_t)map->m_lblk;
46008c6d 1438 end = pgofs + maxblocks;
eb47b800 1439
24b84912 1440 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
b0332a0f 1441 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f4f0b677
JZ		 1442 map->m_may_create)
1443 goto next_dnode;
1444
003a3e1d
JK		 1445 map->m_pblk = ei.blk + pgofs - ei.fofs;
1446 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1447 map->m_flags = F2FS_MAP_MAPPED;
c4020b2d
CY		 1448 if (map->m_next_extent)
1449 *map->m_next_extent = pgofs + map->m_len;
1e78e8bd
ST		 1450
1451 /* for hardware encryption, but to avoid potential issue in future */
1452 if (flag == F2FS_GET_BLOCK_DIO)
1453 f2fs_wait_on_block_writeback_range(inode,
1454 map->m_pblk, map->m_len);
bfad7c2d 1455 goto out;
a2e7d1bf 1456 }
bfad7c2d 1457
4fe71e88 1458next_dnode:
f9d6d059 1459 if (map->m_may_create)
59c9081b 1460 __do_map_lock(sbi, flag, true);
eb47b800
JK		 1461
1462 /* When reading holes, we need its node page */
1463 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1464 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1ec79083 1465 if (err) {
43473f96
CY		 1466 if (flag == F2FS_GET_BLOCK_BMAP)
1467 map->m_pblk = 0;
da85985c 1468 if (err == -ENOENT) {
bfad7c2d 1469 err = 0;
da85985c
CY		 1470 if (map->m_next_pgofs)
1471 *map->m_next_pgofs =
4d57b86d 1472 f2fs_get_next_page_offset(&dn, pgofs);
c4020b2d
CY		 1473 if (map->m_next_extent)
1474 *map->m_next_extent =
4d57b86d 1475 f2fs_get_next_page_offset(&dn, pgofs);
da85985c 1476 }
bfad7c2d 1477 goto unlock_out;
848753aa 1478 }
973163fc 1479
c4020b2d 1480 start_pgofs = pgofs;
46008c6d 1481 prealloc = 0;
230436b3 1482 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
81ca7350 1483 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
4fe71e88
CY		 1484
1485next_block:
a2ced1ce 1486 blkaddr = f2fs_data_blkaddr(&dn);
4fe71e88 1487
c9b60788 1488 if (__is_valid_data_blkaddr(blkaddr) &&
93770ab7 1489 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
10f966bb 1490 err = -EFSCORRUPTED;
c9b60788
CY		 1491 goto sync_out;
1492 }
1493
93770ab7 1494 if (__is_valid_data_blkaddr(blkaddr)) {
f847c699 1495 /* use out-place-update for driect IO under LFS mode */
b0332a0f 1496 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f9d6d059 1497 map->m_may_create) {
f847c699 1498 err = __allocate_data_block(&dn, map->m_seg_type);
05e36006
CY		 1499 if (err)
1500 goto sync_out;
1501 blkaddr = dn.data_blkaddr;
1502 set_inode_flag(inode, FI_APPEND_WRITE);
f847c699
CY		 1503 }
1504 } else {
973163fc 1505 if (create) {
f9811703
CY		 1506 if (unlikely(f2fs_cp_error(sbi))) {
1507 err = -EIO;
4fe71e88 1508 goto sync_out;
f9811703 1509 }
24b84912 1510 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
46008c6d
CY		 1511 if (blkaddr == NULL_ADDR) {
1512 prealloc++;
1513 last_ofs_in_node = dn.ofs_in_node;
1514 }
24b84912 1515 } else {
0a4daae5
JK		 1516 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1517 flag != F2FS_GET_BLOCK_DIO);
d5097be5
HL		 1518 err = __allocate_data_block(&dn,
1519 map->m_seg_type);
6f2d8ed6 1520 if (!err)
91942321 1521 set_inode_flag(inode, FI_APPEND_WRITE);
24b84912 1522 }
973163fc 1523 if (err)
4fe71e88 1524 goto sync_out;
3f2be043 1525 map->m_flags |= F2FS_MAP_NEW;
4fe71e88 1526 blkaddr = dn.data_blkaddr;
973163fc 1527 } else {
43473f96
CY		 1528 if (flag == F2FS_GET_BLOCK_BMAP) {
1529 map->m_pblk = 0;
1530 goto sync_out;
1531 }
c4020b2d
CY		 1532 if (flag == F2FS_GET_BLOCK_PRECACHE)
1533 goto sync_out;
da85985c
CY		 1534 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1535 blkaddr == NULL_ADDR) {
1536 if (map->m_next_pgofs)
1537 *map->m_next_pgofs = pgofs + 1;
4c2ac6a8 1538 goto sync_out;
da85985c 1539 }
f3d98e74
CY		 1540 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1541 /* for defragment case */
1542 if (map->m_next_pgofs)
1543 *map->m_next_pgofs = pgofs + 1;
4fe71e88 1544 goto sync_out;
f3d98e74 1545 }
e2b4e2bc 1546 }
e2b4e2bc 1547 }
eb47b800 1548
46008c6d
CY		 1549 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1550 goto skip;
1551
4fe71e88
CY		 1552 if (map->m_len == 0) {
1553 /* preallocated unwritten block should be mapped for fiemap. */
1554 if (blkaddr == NEW_ADDR)
1555 map->m_flags |= F2FS_MAP_UNWRITTEN;
1556 map->m_flags |= F2FS_MAP_MAPPED;
1557
1558 map->m_pblk = blkaddr;
1559 map->m_len = 1;
1560 } else if ((map->m_pblk != NEW_ADDR &&
1561 blkaddr == (map->m_pblk + ofs)) ||
b439b103 1562 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
46008c6d 1563 flag == F2FS_GET_BLOCK_PRE_DIO) {
4fe71e88
CY		 1564 ofs++;
1565 map->m_len++;
1566 } else {
1567 goto sync_out;
1568 }
bfad7c2d 1569
46008c6d 1570skip:
bfad7c2d
JK		 1571 dn.ofs_in_node++;
1572 pgofs++;
1573
46008c6d
CY		 1574 /* preallocate blocks in batch for one dnode page */
1575 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1576 (pgofs == end || dn.ofs_in_node == end_offset)) {
7df3a431 1577
46008c6d 1578 dn.ofs_in_node = ofs_in_node;
4d57b86d 1579 err = f2fs_reserve_new_blocks(&dn, prealloc);
46008c6d
CY		 1580 if (err)
1581 goto sync_out;
bfad7c2d 1582
46008c6d
CY		 1583 map->m_len += dn.ofs_in_node - ofs_in_node;
1584 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1585 err = -ENOSPC;
1586 goto sync_out;
3104af35 1587 }
46008c6d
CY		 1588 dn.ofs_in_node = end_offset;
1589 }
1590
1591 if (pgofs >= end)
1592 goto sync_out;
1593 else if (dn.ofs_in_node < end_offset)
1594 goto next_block;
1595
c4020b2d
CY		 1596 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1597 if (map->m_flags & F2FS_MAP_MAPPED) {
1598 unsigned int ofs = start_pgofs - map->m_lblk;
1599
1600 f2fs_update_extent_cache_range(&dn,
1601 start_pgofs, map->m_pblk + ofs,
1602 map->m_len - ofs);
1603 }
1604 }
1605
46008c6d
CY		 1606 f2fs_put_dnode(&dn);
1607
f9d6d059 1608 if (map->m_may_create) {
59c9081b 1609 __do_map_lock(sbi, flag, false);
6f2d8ed6 1610 f2fs_balance_fs(sbi, dn.node_changed);
eb47b800 1611 }
46008c6d 1612 goto next_dnode;
7df3a431 1613
bfad7c2d 1614sync_out:
1e78e8bd
ST		 1615
1616 /* for hardware encryption, but to avoid potential issue in future */
1617 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1618 f2fs_wait_on_block_writeback_range(inode,
1619 map->m_pblk, map->m_len);
1620
c4020b2d
CY		 1621 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1622 if (map->m_flags & F2FS_MAP_MAPPED) {
1623 unsigned int ofs = start_pgofs - map->m_lblk;
1624
1625 f2fs_update_extent_cache_range(&dn,
1626 start_pgofs, map->m_pblk + ofs,
1627 map->m_len - ofs);
1628 }
1629 if (map->m_next_extent)
1630 *map->m_next_extent = pgofs + 1;
1631 }
eb47b800 1632 f2fs_put_dnode(&dn);
bfad7c2d 1633unlock_out:
f9d6d059 1634 if (map->m_may_create) {
59c9081b 1635 __do_map_lock(sbi, flag, false);
6f2d8ed6 1636 f2fs_balance_fs(sbi, dn.node_changed);
2a340760 1637 }
bfad7c2d 1638out:
003a3e1d 1639 trace_f2fs_map_blocks(inode, map, err);
bfad7c2d 1640 return err;
eb47b800
JK		 1641}
1642
b91050a8
HL		 1643bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1644{
1645 struct f2fs_map_blocks map;
1646 block_t last_lblk;
1647 int err;
1648
1649 if (pos + len > i_size_read(inode))
1650 return false;
1651
1652 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1653 map.m_next_pgofs = NULL;
1654 map.m_next_extent = NULL;
1655 map.m_seg_type = NO_CHECK_TYPE;
f4f0b677 1656 map.m_may_create = false;
b91050a8
HL		 1657 last_lblk = F2FS_BLK_ALIGN(pos + len);
1658
1659 while (map.m_lblk < last_lblk) {
1660 map.m_len = last_lblk - map.m_lblk;
1661 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1662 if (err || map.m_len == 0)
1663 return false;
1664 map.m_lblk += map.m_len;
1665 }
1666 return true;
1667}
1668
003a3e1d 1669static int __get_data_block(struct inode *inode, sector_t iblock,
da85985c 1670 struct buffer_head *bh, int create, int flag,
f9d6d059 1671 pgoff_t *next_pgofs, int seg_type, bool may_write)
003a3e1d
JK		 1672{
1673 struct f2fs_map_blocks map;
a7de6086 1674 int err;
003a3e1d
JK		 1675
1676 map.m_lblk = iblock;
1677 map.m_len = bh->b_size >> inode->i_blkbits;
da85985c 1678 map.m_next_pgofs = next_pgofs;
c4020b2d 1679 map.m_next_extent = NULL;
d5097be5 1680 map.m_seg_type = seg_type;
f9d6d059 1681 map.m_may_create = may_write;
003a3e1d 1682
a7de6086
JK		 1683 err = f2fs_map_blocks(inode, &map, create, flag);
1684 if (!err) {
003a3e1d
JK		 1685 map_bh(bh, inode->i_sb, map.m_pblk);
1686 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
b86e3307 1687 bh->b_size = (u64)map.m_len << inode->i_blkbits;
003a3e1d 1688 }
a7de6086 1689 return err;
003a3e1d
JK		 1690}
1691
ccfb3000 1692static int get_data_block(struct inode *inode, sector_t iblock,
da85985c
CY		 1693 struct buffer_head *bh_result, int create, int flag,
1694 pgoff_t *next_pgofs)
e2b4e2bc 1695{
da85985c 1696 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1697 flag, next_pgofs,
f9d6d059
CY		 1698 NO_CHECK_TYPE, create);
1699}
1700
1701static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1702 struct buffer_head *bh_result, int create)
1703{
1704 return __get_data_block(inode, iblock, bh_result, create,
1705 F2FS_GET_BLOCK_DIO, NULL,
1706 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
75a037f3 1707 IS_SWAPFILE(inode) ? false : true);
e2b4e2bc
CY		 1708}
1709
1710static int get_data_block_dio(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1711 struct buffer_head *bh_result, int create)
1712{
e2b4e2bc 1713 return __get_data_block(inode, iblock, bh_result, create,
f9d6d059
CY		 1714 F2FS_GET_BLOCK_DIO, NULL,
1715 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1716 false);
ccfb3000
JK		 1717}
1718
e2b4e2bc 1719static int get_data_block_bmap(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1720 struct buffer_head *bh_result, int create)
1721{
179448bf 1722 /* Block number less than F2FS MAX BLOCKS */
e0afc4d6 1723 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
179448bf
YH		 1724 return -EFBIG;
1725
e2b4e2bc 1726 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1727 F2FS_GET_BLOCK_BMAP, NULL,
f9d6d059 1728 NO_CHECK_TYPE, create);
ccfb3000
JK		 1729}
1730
7f63eb77
JK		 1731static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1732{
1733 return (offset >> inode->i_blkbits);
1734}
1735
1736static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1737{
1738 return (blk << inode->i_blkbits);
1739}
1740
442a9dbd
CY		 1741static int f2fs_xattr_fiemap(struct inode *inode,
1742 struct fiemap_extent_info *fieinfo)
1743{
1744 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1745 struct page *page;
1746 struct node_info ni;
1747 __u64 phys = 0, len;
1748 __u32 flags;
1749 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1750 int err = 0;
1751
1752 if (f2fs_has_inline_xattr(inode)) {
1753 int offset;
1754
1755 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1756 inode->i_ino, false);
1757 if (!page)
1758 return -ENOMEM;
1759
7735730d
CY		 1760 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1761 if (err) {
1762 f2fs_put_page(page, 1);
1763 return err;
1764 }
442a9dbd
CY		 1765
1766 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1767 offset = offsetof(struct f2fs_inode, i_addr) +
1768 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
b323fd28 1769 get_inline_xattr_addrs(inode));
442a9dbd
CY		 1770
1771 phys += offset;
1772 len = inline_xattr_size(inode);
1773
1774 f2fs_put_page(page, 1);
1775
1776 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1777
1778 if (!xnid)
1779 flags |= FIEMAP_EXTENT_LAST;
1780
1781 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1782 if (err || err == 1)
1783 return err;
1784 }
1785
1786 if (xnid) {
1787 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1788 if (!page)
1789 return -ENOMEM;
1790
7735730d
CY		 1791 err = f2fs_get_node_info(sbi, xnid, &ni);
1792 if (err) {
1793 f2fs_put_page(page, 1);
1794 return err;
1795 }
442a9dbd
CY		 1796
1797 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1798 len = inode->i_sb->s_blocksize;
1799
1800 f2fs_put_page(page, 1);
1801
1802 flags = FIEMAP_EXTENT_LAST;
1803 }
1804
1805 if (phys)
1806 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1807
1808 return (err < 0 ? err : 0);
1809}
1810
9ab70134
JK		 1811int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1812 u64 start, u64 len)
1813{
7f63eb77
JK		 1814 struct buffer_head map_bh;
1815 sector_t start_blk, last_blk;
da85985c 1816 pgoff_t next_pgofs;
7f63eb77
JK		 1817 u64 logical = 0, phys = 0, size = 0;
1818 u32 flags = 0;
7f63eb77
JK		 1819 int ret = 0;
1820
c4020b2d
CY		 1821 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1822 ret = f2fs_precache_extents(inode);
1823 if (ret)
1824 return ret;
1825 }
1826
442a9dbd 1827 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
7f63eb77
JK		 1828 if (ret)
1829 return ret;
1830
f1b43d4c
CY		 1831 inode_lock(inode);
1832
442a9dbd
CY		 1833 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1834 ret = f2fs_xattr_fiemap(inode, fieinfo);
1835 goto out;
1836 }
1837
7975f349 1838 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
67f8cf3c
JK		 1839 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1840 if (ret != -EAGAIN)
f1b43d4c 1841 goto out;
67f8cf3c
JK		 1842 }
1843
7f63eb77
JK		 1844 if (logical_to_blk(inode, len) == 0)
1845 len = blk_to_logical(inode, 1);
1846
1847 start_blk = logical_to_blk(inode, start);
1848 last_blk = logical_to_blk(inode, start + len - 1);
9a950d52 1849
7f63eb77
JK		 1850next:
1851 memset(&map_bh, 0, sizeof(struct buffer_head));
1852 map_bh.b_size = len;
1853
e2b4e2bc 1854 ret = get_data_block(inode, start_blk, &map_bh, 0,
da85985c 1855 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
7f63eb77
JK		 1856 if (ret)
1857 goto out;
1858
1859 /* HOLE */
1860 if (!buffer_mapped(&map_bh)) {
da85985c 1861 start_blk = next_pgofs;
58736fa6
CY		 1862
1863 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
1864 F2FS_I_SB(inode)->max_file_blocks))
9a950d52 1865 goto prep_next;
58736fa6 1866
9a950d52
FL		 1867 flags |= FIEMAP_EXTENT_LAST;
1868 }
7f63eb77 1869
da5af127 1870 if (size) {
62230e0d 1871 if (IS_ENCRYPTED(inode))
da5af127
CY		 1872 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1873
9a950d52
FL		 1874 ret = fiemap_fill_next_extent(fieinfo, logical,
1875 phys, size, flags);
da5af127 1876 }
7f63eb77 1877
9a950d52
FL		 1878 if (start_blk > last_blk || ret)
1879 goto out;
7f63eb77 1880
9a950d52
FL		 1881 logical = blk_to_logical(inode, start_blk);
1882 phys = blk_to_logical(inode, map_bh.b_blocknr);
1883 size = map_bh.b_size;
1884 flags = 0;
1885 if (buffer_unwritten(&map_bh))
1886 flags = FIEMAP_EXTENT_UNWRITTEN;
7f63eb77 1887
9a950d52 1888 start_blk += logical_to_blk(inode, size);
7f63eb77 1889
9a950d52 1890prep_next:
7f63eb77
JK		 1891 cond_resched();
1892 if (fatal_signal_pending(current))
1893 ret = -EINTR;
1894 else
1895 goto next;
1896out:
1897 if (ret == 1)
1898 ret = 0;
1899
5955102c 1900 inode_unlock(inode);
7f63eb77 1901 return ret;
9ab70134
JK		 1902}
1903
95ae251f
EB		 1904static inline loff_t f2fs_readpage_limit(struct inode *inode)
1905{
1906 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1907 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1908 return inode->i_sb->s_maxbytes;
1909
1910 return i_size_read(inode);
1911}
1912
2df0ab04
CY		 1913static int f2fs_read_single_page(struct inode *inode, struct page *page,
1914 unsigned nr_pages,
1915 struct f2fs_map_blocks *map,
1916 struct bio **bio_ret,
1917 sector_t *last_block_in_bio,
1918 bool is_readahead)
1919{
1920 struct bio *bio = *bio_ret;
1921 const unsigned blkbits = inode->i_blkbits;
1922 const unsigned blocksize = 1 << blkbits;
1923 sector_t block_in_file;
1924 sector_t last_block;
1925 sector_t last_block_in_file;
1926 sector_t block_nr;
1927 int ret = 0;
1928
4969c06a 1929 block_in_file = (sector_t)page_index(page);
2df0ab04 1930 last_block = block_in_file + nr_pages;
95ae251f 1931 last_block_in_file = (f2fs_readpage_limit(inode) + blocksize - 1) >>
2df0ab04
CY		 1932 blkbits;
1933 if (last_block > last_block_in_file)
1934 last_block = last_block_in_file;
1935
1936 /* just zeroing out page which is beyond EOF */
1937 if (block_in_file >= last_block)
1938 goto zero_out;
1939 /*
1940 * Map blocks using the previous result first.
1941 */
1942 if ((map->m_flags & F2FS_MAP_MAPPED) &&
1943 block_in_file > map->m_lblk &&
1944 block_in_file < (map->m_lblk + map->m_len))
1945 goto got_it;
1946
1947 /*
1948 * Then do more f2fs_map_blocks() calls until we are
1949 * done with this page.
1950 */
1951 map->m_lblk = block_in_file;
1952 map->m_len = last_block - block_in_file;
1953
1954 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
1955 if (ret)
1956 goto out;
1957got_it:
1958 if ((map->m_flags & F2FS_MAP_MAPPED)) {
1959 block_nr = map->m_pblk + block_in_file - map->m_lblk;
1960 SetPageMappedToDisk(page);
1961
4969c06a
JK		 1962 if (!PageUptodate(page) && (!PageSwapCache(page) &&
1963 !cleancache_get_page(page))) {
2df0ab04
CY		 1964 SetPageUptodate(page);
1965 goto confused;
1966 }
1967
1968 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
93770ab7 1969 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1970 ret = -EFSCORRUPTED;
2df0ab04
CY		 1971 goto out;
1972 }
1973 } else {
1974zero_out:
1975 zero_user_segment(page, 0, PAGE_SIZE);
95ae251f
EB		 1976 if (f2fs_need_verity(inode, page->index) &&
1977 !fsverity_verify_page(page)) {
1978 ret = -EIO;
1979 goto out;
1980 }
2df0ab04
CY		 1981 if (!PageUptodate(page))
1982 SetPageUptodate(page);
1983 unlock_page(page);
1984 goto out;
1985 }
1986
1987 /*
1988 * This page will go to BIO. Do we need to send this
1989 * BIO off first?
1990 */
8896cbdf
CY		 1991 if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
1992 *last_block_in_bio, block_nr)) {
2df0ab04
CY		 1993submit_and_realloc:
1994 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1995 bio = NULL;
1996 }
1997 if (bio == NULL) {
1998 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
0683728a
CY		 1999 is_readahead ? REQ_RAHEAD : 0, page->index,
2000 false);
2df0ab04
CY		 2001 if (IS_ERR(bio)) {
2002 ret = PTR_ERR(bio);
2003 bio = NULL;
2004 goto out;
2005 }
2006 }
2007
2008 /*
2009 * If the page is under writeback, we need to wait for
2010 * its completion to see the correct decrypted data.
2011 */
2012 f2fs_wait_on_block_writeback(inode, block_nr);
2013
2014 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2015 goto submit_and_realloc;
2016
2017 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
2018 ClearPageError(page);
2019 *last_block_in_bio = block_nr;
2020 goto out;
2021confused:
2022 if (bio) {
2023 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2024 bio = NULL;
2025 }
2026 unlock_page(page);
2027out:
2028 *bio_ret = bio;
2029 return ret;
2030}
2031
4c8ff709
CY		 2032#ifdef CONFIG_F2FS_FS_COMPRESSION
2033int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2034 unsigned nr_pages, sector_t *last_block_in_bio,
0683728a 2035 bool is_readahead, bool for_write)
4c8ff709
CY		 2036{
2037 struct dnode_of_data dn;
2038 struct inode *inode = cc->inode;
2039 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2040 struct bio *bio = *bio_ret;
2041 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2042 sector_t last_block_in_file;
2043 const unsigned blkbits = inode->i_blkbits;
2044 const unsigned blocksize = 1 << blkbits;
2045 struct decompress_io_ctx *dic = NULL;
2046 int i;
2047 int ret = 0;
2048
2049 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2050
7496affa
CY		 2051 last_block_in_file = (f2fs_readpage_limit(inode) +
2052 blocksize - 1) >> blkbits;
4c8ff709
CY		 2053
2054 /* get rid of pages beyond EOF */
2055 for (i = 0; i < cc->cluster_size; i++) {
2056 struct page *page = cc->rpages[i];
2057
2058 if (!page)
2059 continue;
2060 if ((sector_t)page->index >= last_block_in_file) {
2061 zero_user_segment(page, 0, PAGE_SIZE);
2062 if (!PageUptodate(page))
2063 SetPageUptodate(page);
2064 } else if (!PageUptodate(page)) {
2065 continue;
2066 }
2067 unlock_page(page);
2068 cc->rpages[i] = NULL;
2069 cc->nr_rpages--;
2070 }
2071
2072 /* we are done since all pages are beyond EOF */
2073 if (f2fs_cluster_is_empty(cc))
2074 goto out;
2075
2076 set_new_dnode(&dn, inode, NULL, NULL, 0);
2077 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2078 if (ret)
2079 goto out;
2080
2081 /* cluster was overwritten as normal cluster */
2082 if (dn.data_blkaddr != COMPRESS_ADDR)
2083 goto out;
2084
2085 for (i = 1; i < cc->cluster_size; i++) {
2086 block_t blkaddr;
2087
a2ced1ce 2088 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2089 dn.ofs_in_node + i);
2090
2091 if (!__is_valid_data_blkaddr(blkaddr))
2092 break;
2093
2094 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2095 ret = -EFAULT;
2096 goto out_put_dnode;
2097 }
2098 cc->nr_cpages++;
2099 }
2100
2101 /* nothing to decompress */
2102 if (cc->nr_cpages == 0) {
2103 ret = 0;
2104 goto out_put_dnode;
2105 }
2106
2107 dic = f2fs_alloc_dic(cc);
2108 if (IS_ERR(dic)) {
2109 ret = PTR_ERR(dic);
2110 goto out_put_dnode;
2111 }
2112
2113 for (i = 0; i < dic->nr_cpages; i++) {
2114 struct page *page = dic->cpages[i];
2115 block_t blkaddr;
2116
a2ced1ce 2117 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2118 dn.ofs_in_node + i + 1);
2119
2120 if (bio && !page_is_mergeable(sbi, bio,
2121 *last_block_in_bio, blkaddr)) {
2122submit_and_realloc:
2123 __submit_bio(sbi, bio, DATA);
2124 bio = NULL;
2125 }
2126
2127 if (!bio) {
2128 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2129 is_readahead ? REQ_RAHEAD : 0,
0683728a 2130 page->index, for_write);
4c8ff709
CY		 2131 if (IS_ERR(bio)) {
2132 ret = PTR_ERR(bio);
2133 bio = NULL;
2134 dic->failed = true;
2135 if (refcount_sub_and_test(dic->nr_cpages - i,
2136 &dic->ref))
2137 f2fs_decompress_end_io(dic->rpages,
2138 cc->cluster_size, true,
2139 false);
2140 f2fs_free_dic(dic);
2141 f2fs_put_dnode(&dn);
2142 *bio_ret = bio;
2143 return ret;
2144 }
2145 }
2146
2147 f2fs_wait_on_block_writeback(inode, blkaddr);
2148
2149 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2150 goto submit_and_realloc;
2151
2152 inc_page_count(sbi, F2FS_RD_DATA);
2153 ClearPageError(page);
2154 *last_block_in_bio = blkaddr;
2155 }
2156
2157 f2fs_put_dnode(&dn);
2158
2159 *bio_ret = bio;
2160 return 0;
2161
2162out_put_dnode:
2163 f2fs_put_dnode(&dn);
2164out:
2165 f2fs_decompress_end_io(cc->rpages, cc->cluster_size, true, false);
2166 *bio_ret = bio;
2167 return ret;
2168}
2169#endif
2170
f1e88660
JK		 2171/*
2172 * This function was originally taken from fs/mpage.c, and customized for f2fs.
2173 * Major change was from block_size == page_size in f2fs by default.
e2e59414
JK		 2174 *
2175 * Note that the aops->readpages() function is ONLY used for read-ahead. If
2176 * this function ever deviates from doing just read-ahead, it should either
2177 * use ->readpage() or do the necessary surgery to decouple ->readpages()
2178 * from read-ahead.
f1e88660 2179 */
2c684234 2180static int f2fs_mpage_readpages(struct address_space *mapping,
23323196 2181 struct readahead_control *rac, struct page *page)
f1e88660
JK		 2182{
2183 struct bio *bio = NULL;
f1e88660
JK		 2184 sector_t last_block_in_bio = 0;
2185 struct inode *inode = mapping->host;
f1e88660 2186 struct f2fs_map_blocks map;
4c8ff709
CY		 2187#ifdef CONFIG_F2FS_FS_COMPRESSION
2188 struct compress_ctx cc = {
2189 .inode = inode,
2190 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2191 .cluster_size = F2FS_I(inode)->i_cluster_size,
2192 .cluster_idx = NULL_CLUSTER,
2193 .rpages = NULL,
2194 .cpages = NULL,
2195 .nr_rpages = 0,
2196 .nr_cpages = 0,
2197 };
2198#endif
23323196 2199 unsigned nr_pages = rac ? readahead_count(rac) : 1;
4c8ff709 2200 unsigned max_nr_pages = nr_pages;
2df0ab04 2201 int ret = 0;
f1e88660
JK		 2202
2203 map.m_pblk = 0;
2204 map.m_lblk = 0;
2205 map.m_len = 0;
2206 map.m_flags = 0;
da85985c 2207 map.m_next_pgofs = NULL;
c4020b2d 2208 map.m_next_extent = NULL;
d5097be5 2209 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 2210 map.m_may_create = false;
f1e88660 2211
736c0a74 2212 for (; nr_pages; nr_pages--) {
23323196
MWO		 2213 if (rac) {
2214 page = readahead_page(rac);
a83d50bc 2215 prefetchw(&page->flags);
f1e88660
JK		 2216 }
2217
4c8ff709
CY		 2218#ifdef CONFIG_F2FS_FS_COMPRESSION
2219 if (f2fs_compressed_file(inode)) {
2220 /* there are remained comressed pages, submit them */
2221 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2222 ret = f2fs_read_multi_pages(&cc, &bio,
2223 max_nr_pages,
2224 &last_block_in_bio,
23323196 2225 rac != NULL, false);
4c8ff709
CY		 2226 f2fs_destroy_compress_ctx(&cc);
2227 if (ret)
2228 goto set_error_page;
2229 }
2230 ret = f2fs_is_compressed_cluster(inode, page->index);
2231 if (ret < 0)
2232 goto set_error_page;
2233 else if (!ret)
2234 goto read_single_page;
2235
2236 ret = f2fs_init_compress_ctx(&cc);
2237 if (ret)
2238 goto set_error_page;
2239
2240 f2fs_compress_ctx_add_page(&cc, page);
2241
2242 goto next_page;
2243 }
2244read_single_page:
2245#endif
2246
2247 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
23323196 2248 &bio, &last_block_in_bio, rac);
2df0ab04 2249 if (ret) {
4c8ff709
CY		 2250#ifdef CONFIG_F2FS_FS_COMPRESSION
2251set_error_page:
2252#endif
2df0ab04 2253 SetPageError(page);
09cbfeaf 2254 zero_user_segment(page, 0, PAGE_SIZE);
f1e88660 2255 unlock_page(page);
f1e88660 2256 }
23323196 2257#ifdef CONFIG_F2FS_FS_COMPRESSION
f1e88660 2258next_page:
23323196
MWO		 2259#endif
2260 if (rac)
09cbfeaf 2261 put_page(page);
4c8ff709
CY		 2262
2263#ifdef CONFIG_F2FS_FS_COMPRESSION
2264 if (f2fs_compressed_file(inode)) {
2265 /* last page */
2266 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2267 ret = f2fs_read_multi_pages(&cc, &bio,
2268 max_nr_pages,
2269 &last_block_in_bio,
23323196 2270 rac != NULL, false);
4c8ff709
CY		 2271 f2fs_destroy_compress_ctx(&cc);
2272 }
2273 }
2274#endif
f1e88660 2275 }
f1e88660 2276 if (bio)
4fc29c1a 2277 __submit_bio(F2FS_I_SB(inode), bio, DATA);
23323196 2278 return ret;
f1e88660
JK		 2279}
2280
eb47b800
JK		 2281static int f2fs_read_data_page(struct file *file, struct page *page)
2282{
4969c06a 2283 struct inode *inode = page_file_mapping(page)->host;
b3d208f9 2284 int ret = -EAGAIN;
9ffe0fb5 2285
c20e89cd
CY		 2286 trace_f2fs_readpage(page, DATA);
2287
4c8ff709
CY		 2288 if (!f2fs_is_compress_backend_ready(inode)) {
2289 unlock_page(page);
2290 return -EOPNOTSUPP;
2291 }
2292
e1c42045 2293 /* If the file has inline data, try to read it directly */
9ffe0fb5
HL		 2294 if (f2fs_has_inline_data(inode))
2295 ret = f2fs_read_inline_data(inode, page);
b3d208f9 2296 if (ret == -EAGAIN)
23323196 2297 ret = f2fs_mpage_readpages(page_file_mapping(page), NULL, page);
9ffe0fb5 2298 return ret;
eb47b800
JK		 2299}
2300
23323196 2301static void f2fs_readahead(struct readahead_control *rac)
eb47b800 2302{
23323196 2303 struct inode *inode = rac->mapping->host;
b8c29400 2304
23323196 2305 trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac));
9ffe0fb5 2306
4c8ff709 2307 if (!f2fs_is_compress_backend_ready(inode))
23323196 2308 return;
4c8ff709 2309
9ffe0fb5
HL		 2310 /* If the file has inline data, skip readpages */
2311 if (f2fs_has_inline_data(inode))
23323196 2312 return;
9ffe0fb5 2313
23323196 2314 f2fs_mpage_readpages(rac->mapping, rac, NULL);
eb47b800
JK		 2315}
2316
4c8ff709 2317int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
7eab0c0d
HP		 2318{
2319 struct inode *inode = fio->page->mapping->host;
4c8ff709 2320 struct page *mpage, *page;
7eab0c0d
HP		 2321 gfp_t gfp_flags = GFP_NOFS;
2322
1958593e 2323 if (!f2fs_encrypted_file(inode))
7eab0c0d
HP		 2324 return 0;
2325
4c8ff709
CY		 2326 page = fio->compressed_page ? fio->compressed_page : fio->page;
2327
6dbb1796 2328 /* wait for GCed page writeback via META_MAPPING */
0ded69f6 2329 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
7eab0c0d
HP		 2330
2331retry_encrypt:
4c8ff709
CY		 2332 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2333 PAGE_SIZE, 0, gfp_flags);
6aa58d8a
CY		 2334 if (IS_ERR(fio->encrypted_page)) {
2335 /* flush pending IOs and wait for a while in the ENOMEM case */
2336 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2337 f2fs_flush_merged_writes(fio->sbi);
5df7731f 2338 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
6aa58d8a
CY		 2339 gfp_flags |= __GFP_NOFAIL;
2340 goto retry_encrypt;
2341 }
2342 return PTR_ERR(fio->encrypted_page);
2343 }
7eab0c0d 2344
6aa58d8a
CY		 2345 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2346 if (mpage) {
2347 if (PageUptodate(mpage))
2348 memcpy(page_address(mpage),
2349 page_address(fio->encrypted_page), PAGE_SIZE);
2350 f2fs_put_page(mpage, 1);
7eab0c0d 2351 }
6aa58d8a 2352 return 0;
7eab0c0d
HP		 2353}
2354
bb9e3bb8
CY		 2355static inline bool check_inplace_update_policy(struct inode *inode,
2356 struct f2fs_io_info *fio)
7eab0c0d 2357{
bb9e3bb8
CY		 2358 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2359 unsigned int policy = SM_I(sbi)->ipu_policy;
7eab0c0d 2360
bb9e3bb8
CY		 2361 if (policy & (0x1 << F2FS_IPU_FORCE))
2362 return true;
4d57b86d 2363 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
bb9e3bb8
CY		 2364 return true;
2365 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2366 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2367 return true;
4d57b86d 2368 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
bb9e3bb8
CY		 2369 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2370 return true;
2371
2372 /*
2373 * IPU for rewrite async pages
2374 */
2375 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2376 fio && fio->op == REQ_OP_WRITE &&
2377 !(fio->op_flags & REQ_SYNC) &&
62230e0d 2378 !IS_ENCRYPTED(inode))
bb9e3bb8
CY		 2379 return true;
2380
2381 /* this is only set during fdatasync */
2382 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2383 is_inode_flag_set(inode, FI_NEED_IPU))
2384 return true;
2385
4354994f
DR		 2386 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2387 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2388 return true;
2389
bb9e3bb8
CY		 2390 return false;
2391}
2392
4d57b86d 2393bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8 2394{
1ad71a27
JK		 2395 if (f2fs_is_pinned_file(inode))
2396 return true;
bb9e3bb8
CY		 2397
2398 /* if this is cold file, we should overwrite to avoid fragmentation */
2399 if (file_is_cold(inode))
2400 return true;
2401
2402 return check_inplace_update_policy(inode, fio);
2403}
2404
4d57b86d 2405bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8
CY		 2406{
2407 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2408
b0332a0f 2409 if (f2fs_lfs_mode(sbi))
bb9e3bb8
CY		 2410 return true;
2411 if (S_ISDIR(inode->i_mode))
2412 return true;
af033b2a
CY		 2413 if (IS_NOQUOTA(inode))
2414 return true;
bb9e3bb8
CY		 2415 if (f2fs_is_atomic_file(inode))
2416 return true;
2417 if (fio) {
2418 if (is_cold_data(fio->page))
2419 return true;
2420 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
2421 return true;
4354994f
DR		 2422 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2423 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2424 return true;
bb9e3bb8
CY		 2425 }
2426 return false;
2427}
2428
7eab0c0d
HP		 2429static inline bool need_inplace_update(struct f2fs_io_info *fio)
2430{
2431 struct inode *inode = fio->page->mapping->host;
2432
4d57b86d 2433 if (f2fs_should_update_outplace(inode, fio))
7eab0c0d
HP		 2434 return false;
2435
4d57b86d 2436 return f2fs_should_update_inplace(inode, fio);
7eab0c0d
HP		 2437}
2438
4d57b86d 2439int f2fs_do_write_data_page(struct f2fs_io_info *fio)
eb47b800 2440{
05ca3632 2441 struct page *page = fio->page;
eb47b800 2442 struct inode *inode = page->mapping->host;
eb47b800 2443 struct dnode_of_data dn;
e959c8f5 2444 struct extent_info ei = {0,0,0};
7735730d 2445 struct node_info ni;
e959c8f5 2446 bool ipu_force = false;
eb47b800
JK		 2447 int err = 0;
2448
2449 set_new_dnode(&dn, inode, NULL, NULL, 0);
e959c8f5
HP		 2450 if (need_inplace_update(fio) &&
2451 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2452 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
a817737e 2453
c9b60788 2454 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2455 DATA_GENERIC_ENHANCE))
10f966bb 2456 return -EFSCORRUPTED;
c9b60788
CY		 2457
2458 ipu_force = true;
2459 fio->need_lock = LOCK_DONE;
2460 goto got_it;
e959c8f5 2461 }
279d6df2 2462
d29460e5
JK		 2463 /* Deadlock due to between page->lock and f2fs_lock_op */
2464 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2465 return -EAGAIN;
279d6df2 2466
4d57b86d 2467 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
eb47b800 2468 if (err)
279d6df2 2469 goto out;
eb47b800 2470
28bc106b 2471 fio->old_blkaddr = dn.data_blkaddr;
eb47b800
JK		 2472
2473 /* This page is already truncated */
7a9d7548 2474 if (fio->old_blkaddr == NULL_ADDR) {
2bca1e23 2475 ClearPageUptodate(page);
2baf0781 2476 clear_cold_data(page);
eb47b800 2477 goto out_writepage;
2bca1e23 2478 }
e959c8f5 2479got_it:
c9b60788
CY		 2480 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2481 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2482 DATA_GENERIC_ENHANCE)) {
10f966bb 2483 err = -EFSCORRUPTED;
c9b60788
CY		 2484 goto out_writepage;
2485 }
eb47b800
JK		 2486 /*
2487 * If current allocation needs SSR,
2488 * it had better in-place writes for updated data.
2489 */
93770ab7
CY		 2490 if (ipu_force ||
2491 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
7b525dd0 2492 need_inplace_update(fio))) {
4c8ff709 2493 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2494 if (err)
2495 goto out_writepage;
2496
2497 set_page_writeback(page);
17c50035 2498 ClearPageError(page);
279d6df2 2499 f2fs_put_dnode(&dn);
cc15620b 2500 if (fio->need_lock == LOCK_REQ)
279d6df2 2501 f2fs_unlock_op(fio->sbi);
4d57b86d 2502 err = f2fs_inplace_write_data(fio);
6492a335
CY		 2503 if (err) {
2504 if (f2fs_encrypted_file(inode))
d2d0727b 2505 fscrypt_finalize_bounce_page(&fio->encrypted_page);
6492a335
CY		 2506 if (PageWriteback(page))
2507 end_page_writeback(page);
cd23ffa9
CY		 2508 } else {
2509 set_inode_flag(inode, FI_UPDATE_WRITE);
6492a335 2510 }
7eab0c0d 2511 trace_f2fs_do_write_data_page(fio->page, IPU);
279d6df2 2512 return err;
eb47b800 2513 }
279d6df2 2514
cc15620b
JK		 2515 if (fio->need_lock == LOCK_RETRY) {
2516 if (!f2fs_trylock_op(fio->sbi)) {
2517 err = -EAGAIN;
2518 goto out_writepage;
2519 }
2520 fio->need_lock = LOCK_REQ;
2521 }
2522
7735730d
CY		 2523 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2524 if (err)
2525 goto out_writepage;
2526
2527 fio->version = ni.version;
2528
4c8ff709 2529 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2530 if (err)
2531 goto out_writepage;
2532
2533 set_page_writeback(page);
17c50035 2534 ClearPageError(page);
cc15620b 2535
4c8ff709
CY		 2536 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2537 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2538
279d6df2 2539 /* LFS mode write path */
4d57b86d 2540 f2fs_outplace_write_data(&dn, fio);
279d6df2
HP		 2541 trace_f2fs_do_write_data_page(page, OPU);
2542 set_inode_flag(inode, FI_APPEND_WRITE);
2543 if (page->index == 0)
2544 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
eb47b800
JK		 2545out_writepage:
2546 f2fs_put_dnode(&dn);
279d6df2 2547out:
cc15620b 2548 if (fio->need_lock == LOCK_REQ)
279d6df2 2549 f2fs_unlock_op(fio->sbi);
eb47b800
JK		 2550 return err;
2551}
2552
4c8ff709 2553int f2fs_write_single_data_page(struct page *page, int *submitted,
8648de2c
CY		 2554 struct bio **bio,
2555 sector_t *last_block,
b0af6d49 2556 struct writeback_control *wbc,
4c8ff709
CY		 2557 enum iostat_type io_type,
2558 int compr_blocks)
eb47b800
JK		 2559{
2560 struct inode *inode = page->mapping->host;
4081363f 2561 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
eb47b800 2562 loff_t i_size = i_size_read(inode);
4c8ff709 2563 const pgoff_t end_index = ((unsigned long long)i_size)
09cbfeaf 2564 >> PAGE_SHIFT;
1f0d5c91 2565 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
9ffe0fb5 2566 unsigned offset = 0;
39936837 2567 bool need_balance_fs = false;
eb47b800 2568 int err = 0;
458e6197 2569 struct f2fs_io_info fio = {
05ca3632 2570 .sbi = sbi,
39d787be 2571 .ino = inode->i_ino,
458e6197 2572 .type = DATA,
04d328de 2573 .op = REQ_OP_WRITE,
7637241e 2574 .op_flags = wbc_to_write_flags(wbc),
e959c8f5 2575 .old_blkaddr = NULL_ADDR,
05ca3632 2576 .page = page,
4375a336 2577 .encrypted_page = NULL,
d68f735b 2578 .submitted = false,
4c8ff709 2579 .compr_blocks = compr_blocks,
cc15620b 2580 .need_lock = LOCK_RETRY,
b0af6d49 2581 .io_type = io_type,
578c6478 2582 .io_wbc = wbc,
8648de2c
CY		 2583 .bio = bio,
2584 .last_block = last_block,
458e6197 2585 };
eb47b800 2586
ecda0de3
CY		 2587 trace_f2fs_writepage(page, DATA);
2588
db198ae0
CY		 2589 /* we should bypass data pages to proceed the kworkder jobs */
2590 if (unlikely(f2fs_cp_error(sbi))) {
2591 mapping_set_error(page->mapping, -EIO);
1174abfd
CY		 2592 /*
2593 * don't drop any dirty dentry pages for keeping lastest
2594 * directory structure.
2595 */
2596 if (S_ISDIR(inode->i_mode))
2597 goto redirty_out;
db198ae0
CY		 2598 goto out;
2599 }
2600
0771fcc7
CY		 2601 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2602 goto redirty_out;
2603
4c8ff709
CY		 2604 if (page->index < end_index ||
2605 f2fs_verity_in_progress(inode) ||
2606 compr_blocks)
39936837 2607 goto write;
eb47b800
JK		 2608
2609 /*
2610 * If the offset is out-of-range of file size,
2611 * this page does not have to be written to disk.
2612 */
09cbfeaf 2613 offset = i_size & (PAGE_SIZE - 1);
76f60268 2614 if ((page->index >= end_index + 1) || !offset)
39936837 2615 goto out;
eb47b800 2616
09cbfeaf 2617 zero_user_segment(page, offset, PAGE_SIZE);
39936837 2618write:
1e84371f
JK		 2619 if (f2fs_is_drop_cache(inode))
2620 goto out;
e6e5f561
JK		 2621 /* we should not write 0'th page having journal header */
2622 if (f2fs_is_volatile_file(inode) && (!page->index ||
2623 (!wbc->for_reclaim &&
4d57b86d 2624 f2fs_available_free_memory(sbi, BASE_CHECK))))
1e84371f 2625 goto redirty_out;
eb47b800 2626
39936837 2627 /* Dentry blocks are controlled by checkpoint */
eb47b800 2628 if (S_ISDIR(inode->i_mode)) {
cc15620b 2629 fio.need_lock = LOCK_DONE;
4d57b86d 2630 err = f2fs_do_write_data_page(&fio);
8618b881
JK		 2631 goto done;
2632 }
9ffe0fb5 2633
8618b881 2634 if (!wbc->for_reclaim)
39936837 2635 need_balance_fs = true;
7f3037a5 2636 else if (has_not_enough_free_secs(sbi, 0, 0))
39936837 2637 goto redirty_out;
ef095d19
JK		 2638 else
2639 set_inode_flag(inode, FI_HOT_DATA);
eb47b800 2640
b3d208f9 2641 err = -EAGAIN;
dd7b2333 2642 if (f2fs_has_inline_data(inode)) {
b3d208f9 2643 err = f2fs_write_inline_data(inode, page);
dd7b2333
YH		 2644 if (!err)
2645 goto out;
2646 }
279d6df2 2647
cc15620b 2648 if (err == -EAGAIN) {
4d57b86d 2649 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2650 if (err == -EAGAIN) {
2651 fio.need_lock = LOCK_REQ;
4d57b86d 2652 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2653 }
2654 }
a0d00fad 2655
eb449797
CY		 2656 if (err) {
2657 file_set_keep_isize(inode);
2658 } else {
c10c9820 2659 spin_lock(&F2FS_I(inode)->i_size_lock);
eb449797
CY		 2660 if (F2FS_I(inode)->last_disk_size < psize)
2661 F2FS_I(inode)->last_disk_size = psize;
c10c9820 2662 spin_unlock(&F2FS_I(inode)->i_size_lock);
eb449797 2663 }
279d6df2 2664
8618b881
JK		 2665done:
2666 if (err && err != -ENOENT)
2667 goto redirty_out;
eb47b800 2668
39936837 2669out:
a7ffdbe2 2670 inode_dec_dirty_pages(inode);
2baf0781 2671 if (err) {
2bca1e23 2672 ClearPageUptodate(page);
2baf0781
CY		 2673 clear_cold_data(page);
2674 }
0c3a5797
CY		 2675
2676 if (wbc->for_reclaim) {
bab475c5 2677 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
ef095d19 2678 clear_inode_flag(inode, FI_HOT_DATA);
4d57b86d 2679 f2fs_remove_dirty_inode(inode);
d68f735b 2680 submitted = NULL;
0c3a5797 2681 }
eb47b800 2682 unlock_page(page);
186857c5 2683 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
0b20fcec 2684 !F2FS_I(inode)->cp_task)
a7881893 2685 f2fs_balance_fs(sbi, need_balance_fs);
0c3a5797 2686
d68f735b 2687 if (unlikely(f2fs_cp_error(sbi))) {
b9109b0e 2688 f2fs_submit_merged_write(sbi, DATA);
0b20fcec 2689 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
d68f735b
JK		 2690 submitted = NULL;
2691 }
2692
2693 if (submitted)
4c8ff709 2694 *submitted = fio.submitted ? 1 : 0;
0c3a5797 2695
eb47b800
JK		 2696 return 0;
2697
eb47b800 2698redirty_out:
76f60268 2699 redirty_page_for_writepage(wbc, page);
5b19d284
JK		 2700 /*
2701 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2702 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2703 * file_write_and_wait_range() will see EIO error, which is critical
2704 * to return value of fsync() followed by atomic_write failure to user.
2705 */
2706 if (!err || wbc->for_reclaim)
0002b61b 2707 return AOP_WRITEPAGE_ACTIVATE;
b230e6ca
JK		 2708 unlock_page(page);
2709 return err;
fa9150a8
NJ		 2710}
2711
f566bae8
JK		 2712static int f2fs_write_data_page(struct page *page,
2713 struct writeback_control *wbc)
2714{
4c8ff709
CY		 2715#ifdef CONFIG_F2FS_FS_COMPRESSION
2716 struct inode *inode = page->mapping->host;
2717
2718 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2719 goto out;
2720
2721 if (f2fs_compressed_file(inode)) {
2722 if (f2fs_is_compressed_cluster(inode, page->index)) {
2723 redirty_page_for_writepage(wbc, page);
2724 return AOP_WRITEPAGE_ACTIVATE;
2725 }
2726 }
2727out:
2728#endif
2729
2730 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
2731 wbc, FS_DATA_IO, 0);
f566bae8
JK		 2732}
2733
8f46dcae
CY		 2734/*
2735 * This function was copied from write_cche_pages from mm/page-writeback.c.
2736 * The major change is making write step of cold data page separately from
2737 * warm/hot data page.
2738 */
2739static int f2fs_write_cache_pages(struct address_space *mapping,
b0af6d49
CY		 2740 struct writeback_control *wbc,
2741 enum iostat_type io_type)
8f46dcae
CY		 2742{
2743 int ret = 0;
4c8ff709 2744 int done = 0, retry = 0;
8f46dcae 2745 struct pagevec pvec;
c29fd0c0 2746 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
8648de2c
CY		 2747 struct bio *bio = NULL;
2748 sector_t last_block;
4c8ff709
CY		 2749#ifdef CONFIG_F2FS_FS_COMPRESSION
2750 struct inode *inode = mapping->host;
2751 struct compress_ctx cc = {
2752 .inode = inode,
2753 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2754 .cluster_size = F2FS_I(inode)->i_cluster_size,
2755 .cluster_idx = NULL_CLUSTER,
2756 .rpages = NULL,
2757 .nr_rpages = 0,
2758 .cpages = NULL,
2759 .rbuf = NULL,
2760 .cbuf = NULL,
2761 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2762 .private = NULL,
2763 };
2764#endif
8f46dcae
CY		 2765 int nr_pages;
2766 pgoff_t uninitialized_var(writeback_index);
2767 pgoff_t index;
2768 pgoff_t end; /* Inclusive */
2769 pgoff_t done_index;
2770 int cycled;
2771 int range_whole = 0;
10bbd235 2772 xa_mark_t tag;
bab475c5 2773 int nwritten = 0;
4c8ff709
CY		 2774 int submitted = 0;
2775 int i;
8f46dcae 2776
86679820 2777 pagevec_init(&pvec);
46ae957f 2778
ef095d19
JK		 2779 if (get_dirty_pages(mapping->host) <=
2780 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2781 set_inode_flag(mapping->host, FI_HOT_DATA);
2782 else
2783 clear_inode_flag(mapping->host, FI_HOT_DATA);
2784
8f46dcae
CY		 2785 if (wbc->range_cyclic) {
2786 writeback_index = mapping->writeback_index; /* prev offset */
2787 index = writeback_index;
2788 if (index == 0)
2789 cycled = 1;
2790 else
2791 cycled = 0;
2792 end = -1;
2793 } else {
09cbfeaf
KS		 2794 index = wbc->range_start >> PAGE_SHIFT;
2795 end = wbc->range_end >> PAGE_SHIFT;
8f46dcae
CY		 2796 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2797 range_whole = 1;
2798 cycled = 1; /* ignore range_cyclic tests */
2799 }
2800 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2801 tag = PAGECACHE_TAG_TOWRITE;
2802 else
2803 tag = PAGECACHE_TAG_DIRTY;
2804retry:
4c8ff709 2805 retry = 0;
8f46dcae
CY		 2806 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2807 tag_pages_for_writeback(mapping, index, end);
2808 done_index = index;
4c8ff709 2809 while (!done && !retry && (index <= end)) {
69c4f35d 2810 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
67fd707f 2811 tag);
8f46dcae
CY		 2812 if (nr_pages == 0)
2813 break;
2814
2815 for (i = 0; i < nr_pages; i++) {
2816 struct page *page = pvec.pages[i];
4c8ff709
CY		 2817 bool need_readd;
2818readd:
2819 need_readd = false;
2820#ifdef CONFIG_F2FS_FS_COMPRESSION
2821 if (f2fs_compressed_file(inode)) {
2822 ret = f2fs_init_compress_ctx(&cc);
2823 if (ret) {
2824 done = 1;
2825 break;
2826 }
2827
2828 if (!f2fs_cluster_can_merge_page(&cc,
2829 page->index)) {
2830 ret = f2fs_write_multi_pages(&cc,
2831 &submitted, wbc, io_type);
2832 if (!ret)
2833 need_readd = true;
2834 goto result;
2835 }
8f46dcae 2836
4c8ff709
CY		 2837 if (unlikely(f2fs_cp_error(sbi)))
2838 goto lock_page;
2839
2840 if (f2fs_cluster_is_empty(&cc)) {
2841 void *fsdata = NULL;
2842 struct page *pagep;
2843 int ret2;
2844
2845 ret2 = f2fs_prepare_compress_overwrite(
2846 inode, &pagep,
2847 page->index, &fsdata);
2848 if (ret2 < 0) {
2849 ret = ret2;
2850 done = 1;
2851 break;
2852 } else if (ret2 &&
2853 !f2fs_compress_write_end(inode,
2854 fsdata, page->index,
2855 1)) {
2856 retry = 1;
2857 break;
2858 }
2859 } else {
2860 goto lock_page;
2861 }
2862 }
2863#endif
f8de4331 2864 /* give a priority to WB_SYNC threads */
c29fd0c0 2865 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
f8de4331
CY		 2866 wbc->sync_mode == WB_SYNC_NONE) {
2867 done = 1;
2868 break;
2869 }
4c8ff709
CY		 2870#ifdef CONFIG_F2FS_FS_COMPRESSION
2871lock_page:
2872#endif
8f46dcae 2873 done_index = page->index;
d29460e5 2874retry_write:
8f46dcae
CY		 2875 lock_page(page);
2876
2877 if (unlikely(page->mapping != mapping)) {
2878continue_unlock:
2879 unlock_page(page);
2880 continue;
2881 }
2882
2883 if (!PageDirty(page)) {
2884 /* someone wrote it for us */
2885 goto continue_unlock;
2886 }
2887
8f46dcae 2888 if (PageWriteback(page)) {
0b20fcec 2889 if (wbc->sync_mode != WB_SYNC_NONE)
fec1d657 2890 f2fs_wait_on_page_writeback(page,
bae0ee7a 2891 DATA, true, true);
0b20fcec 2892 else
8f46dcae
CY		 2893 goto continue_unlock;
2894 }
2895
8f46dcae
CY		 2896 if (!clear_page_dirty_for_io(page))
2897 goto continue_unlock;
2898
4c8ff709
CY		 2899#ifdef CONFIG_F2FS_FS_COMPRESSION
2900 if (f2fs_compressed_file(inode)) {
2901 get_page(page);
2902 f2fs_compress_ctx_add_page(&cc, page);
2903 continue;
2904 }
2905#endif
2906 ret = f2fs_write_single_data_page(page, &submitted,
2907 &bio, &last_block, wbc, io_type, 0);
2908 if (ret == AOP_WRITEPAGE_ACTIVATE)
2909 unlock_page(page);
2910#ifdef CONFIG_F2FS_FS_COMPRESSION
2911result:
2912#endif
2913 nwritten += submitted;
2914 wbc->nr_to_write -= submitted;
2915
8f46dcae 2916 if (unlikely(ret)) {
0002b61b
CY		 2917 /*
2918 * keep nr_to_write, since vfs uses this to
2919 * get # of written pages.
2920 */
2921 if (ret == AOP_WRITEPAGE_ACTIVATE) {
0002b61b 2922 ret = 0;
4c8ff709 2923 goto next;
d29460e5
JK		 2924 } else if (ret == -EAGAIN) {
2925 ret = 0;
2926 if (wbc->sync_mode == WB_SYNC_ALL) {
2927 cond_resched();
2928 congestion_wait(BLK_RW_ASYNC,
5df7731f 2929 DEFAULT_IO_TIMEOUT);
d29460e5
JK		 2930 goto retry_write;
2931 }
4c8ff709 2932 goto next;
0002b61b 2933 }
b230e6ca
JK		 2934 done_index = page->index + 1;
2935 done = 1;
2936 break;
8f46dcae
CY		 2937 }
2938
4c8ff709 2939 if (wbc->nr_to_write <= 0 &&
687de7f1 2940 wbc->sync_mode == WB_SYNC_NONE) {
8f46dcae
CY		 2941 done = 1;
2942 break;
2943 }
4c8ff709
CY		 2944next:
2945 if (need_readd)
2946 goto readd;
8f46dcae
CY		 2947 }
2948 pagevec_release(&pvec);
2949 cond_resched();
2950 }
4c8ff709
CY		 2951#ifdef CONFIG_F2FS_FS_COMPRESSION
2952 /* flush remained pages in compress cluster */
2953 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
2954 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
2955 nwritten += submitted;
2956 wbc->nr_to_write -= submitted;
2957 if (ret) {
2958 done = 1;
2959 retry = 0;
2960 }
2961 }
2962#endif
2963 if ((!cycled && !done) || retry) {
8f46dcae
CY		 2964 cycled = 1;
2965 index = 0;
2966 end = writeback_index - 1;
2967 goto retry;
2968 }
2969 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
2970 mapping->writeback_index = done_index;
2971
bab475c5 2972 if (nwritten)
b9109b0e 2973 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
bab475c5 2974 NULL, 0, DATA);
8648de2c
CY		 2975 /* submit cached bio of IPU write */
2976 if (bio)
0b20fcec 2977 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
6ca56ca4 2978
8f46dcae
CY		 2979 return ret;
2980}
2981
853137ce
JK		 2982static inline bool __should_serialize_io(struct inode *inode,
2983 struct writeback_control *wbc)
2984{
b13f67ff
CY		 2985 /* to avoid deadlock in path of data flush */
2986 if (F2FS_I(inode)->cp_task)
2987 return false;
2988
853137ce
JK		 2989 if (!S_ISREG(inode->i_mode))
2990 return false;
af033b2a
CY		 2991 if (IS_NOQUOTA(inode))
2992 return false;
b13f67ff
CY		 2993
2994 if (f2fs_compressed_file(inode))
2995 return true;
853137ce
JK		 2996 if (wbc->sync_mode != WB_SYNC_ALL)
2997 return true;
2998 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
2999 return true;
3000 return false;
3001}
3002
fc99fe27 3003static int __f2fs_write_data_pages(struct address_space *mapping,
b0af6d49
CY		 3004 struct writeback_control *wbc,
3005 enum iostat_type io_type)
eb47b800
JK		 3006{
3007 struct inode *inode = mapping->host;
4081363f 3008 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9dfa1baf 3009 struct blk_plug plug;
eb47b800 3010 int ret;
853137ce 3011 bool locked = false;
eb47b800 3012
cfb185a1 3013 /* deal with chardevs and other special file */
3014 if (!mapping->a_ops->writepage)
3015 return 0;
3016
6a290544
CY		 3017 /* skip writing if there is no dirty page in this inode */
3018 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3019 return 0;
3020
0771fcc7
CY		 3021 /* during POR, we don't need to trigger writepage at all. */
3022 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3023 goto skip_write;
3024
af033b2a
CY		 3025 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3026 wbc->sync_mode == WB_SYNC_NONE &&
a1257023 3027 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
4d57b86d 3028 f2fs_available_free_memory(sbi, DIRTY_DENTS))
a1257023
JK		 3029 goto skip_write;
3030
d323d005 3031 /* skip writing during file defragment */
91942321 3032 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
d323d005
CY		 3033 goto skip_write;
3034
d31c7c3f
YH		 3035 trace_f2fs_writepages(mapping->host, wbc, DATA);
3036
687de7f1
JK		 3037 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
3038 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0
CY		 3039 atomic_inc(&sbi->wb_sync_req[DATA]);
3040 else if (atomic_read(&sbi->wb_sync_req[DATA]))
687de7f1
JK		 3041 goto skip_write;
3042
853137ce
JK		 3043 if (__should_serialize_io(inode, wbc)) {
3044 mutex_lock(&sbi->writepages);
3045 locked = true;
3046 }
3047
9dfa1baf 3048 blk_start_plug(&plug);
b0af6d49 3049 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
9dfa1baf 3050 blk_finish_plug(&plug);
687de7f1 3051
853137ce
JK		 3052 if (locked)
3053 mutex_unlock(&sbi->writepages);
3054
687de7f1 3055 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0 3056 atomic_dec(&sbi->wb_sync_req[DATA]);
28ea6162
JK		 3057 /*
3058 * if some pages were truncated, we cannot guarantee its mapping->host
3059 * to detect pending bios.
3060 */
458e6197 3061
4d57b86d 3062 f2fs_remove_dirty_inode(inode);
eb47b800 3063 return ret;
d3baf95d
JK		 3064
3065skip_write:
a7ffdbe2 3066 wbc->pages_skipped += get_dirty_pages(inode);
d31c7c3f 3067 trace_f2fs_writepages(mapping->host, wbc, DATA);
d3baf95d 3068 return 0;
eb47b800
JK		 3069}
3070
b0af6d49
CY		 3071static int f2fs_write_data_pages(struct address_space *mapping,
3072 struct writeback_control *wbc)
3073{
3074 struct inode *inode = mapping->host;
3075
3076 return __f2fs_write_data_pages(mapping, wbc,
3077 F2FS_I(inode)->cp_task == current ?
3078 FS_CP_DATA_IO : FS_DATA_IO);
3079}
3080
3aab8f82
CY		 3081static void f2fs_write_failed(struct address_space *mapping, loff_t to)
3082{
3083 struct inode *inode = mapping->host;
819d9153 3084 loff_t i_size = i_size_read(inode);
3aab8f82 3085
3f188c23
JK		 3086 if (IS_NOQUOTA(inode))
3087 return;
3088
95ae251f
EB		 3089 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
3090 if (to > i_size && !f2fs_verity_in_progress(inode)) {
a33c1502 3091 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
6f8d4455 3092 down_write(&F2FS_I(inode)->i_mmap_sem);
a33c1502 3093
819d9153 3094 truncate_pagecache(inode, i_size);
3f188c23 3095 f2fs_truncate_blocks(inode, i_size, true);
a33c1502 3096
5a3a2d83 3097 up_write(&F2FS_I(inode)->i_mmap_sem);
6f8d4455 3098 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3aab8f82
CY		 3099 }
3100}
3101
2aadac08
JK		 3102static int prepare_write_begin(struct f2fs_sb_info *sbi,
3103 struct page *page, loff_t pos, unsigned len,
3104 block_t *blk_addr, bool *node_changed)
3105{
3106 struct inode *inode = page->mapping->host;
3107 pgoff_t index = page->index;
3108 struct dnode_of_data dn;
3109 struct page *ipage;
b4d07a3e 3110 bool locked = false;
e15882b6 3111 struct extent_info ei = {0,0,0};
2aadac08 3112 int err = 0;
2866fb16 3113 int flag;
2aadac08 3114
24b84912
JK		 3115 /*
3116 * we already allocated all the blocks, so we don't need to get
3117 * the block addresses when there is no need to fill the page.
3118 */
dc91de78 3119 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
95ae251f
EB		 3120 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
3121 !f2fs_verity_in_progress(inode))
24b84912
JK		 3122 return 0;
3123
2866fb16
SY		 3124 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
3125 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3126 flag = F2FS_GET_BLOCK_DEFAULT;
3127 else
3128 flag = F2FS_GET_BLOCK_PRE_AIO;
3129
b4d07a3e 3130 if (f2fs_has_inline_data(inode) ||
09cbfeaf 3131 (pos & PAGE_MASK) >= i_size_read(inode)) {
2866fb16 3132 __do_map_lock(sbi, flag, true);
b4d07a3e
JK		 3133 locked = true;
3134 }
4c8ff709 3135
b4d07a3e 3136restart:
2aadac08 3137 /* check inline_data */
4d57b86d 3138 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2aadac08
JK		 3139 if (IS_ERR(ipage)) {
3140 err = PTR_ERR(ipage);
3141 goto unlock_out;
3142 }
3143
3144 set_new_dnode(&dn, inode, ipage, ipage, 0);
3145
3146 if (f2fs_has_inline_data(inode)) {
f2470371 3147 if (pos + len <= MAX_INLINE_DATA(inode)) {
4d57b86d 3148 f2fs_do_read_inline_data(page, ipage);
91942321 3149 set_inode_flag(inode, FI_DATA_EXIST);
ab47036d
CY		 3150 if (inode->i_nlink)
3151 set_inline_node(ipage);
2aadac08
JK		 3152 } else {
3153 err = f2fs_convert_inline_page(&dn, page);
3154 if (err)
b4d07a3e
JK		 3155 goto out;
3156 if (dn.data_blkaddr == NULL_ADDR)
3157 err = f2fs_get_block(&dn, index);
3158 }
3159 } else if (locked) {
3160 err = f2fs_get_block(&dn, index);
3161 } else {
3162 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3163 dn.data_blkaddr = ei.blk + index - ei.fofs;
3164 } else {
b4d07a3e 3165 /* hole case */
4d57b86d 3166 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
4da7bf5a 3167 if (err || dn.data_blkaddr == NULL_ADDR) {
b4d07a3e 3168 f2fs_put_dnode(&dn);
59c9081b
YH		 3169 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
3170 true);
2866fb16 3171 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
b4d07a3e
JK		 3172 locked = true;
3173 goto restart;
3174 }
2aadac08
JK		 3175 }
3176 }
b4d07a3e 3177
2aadac08
JK		 3178 /* convert_inline_page can make node_changed */
3179 *blk_addr = dn.data_blkaddr;
3180 *node_changed = dn.node_changed;
b4d07a3e 3181out:
2aadac08
JK		 3182 f2fs_put_dnode(&dn);
3183unlock_out:
b4d07a3e 3184 if (locked)
2866fb16 3185 __do_map_lock(sbi, flag, false);
2aadac08
JK		 3186 return err;
3187}
3188
eb47b800
JK		 3189static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3190 loff_t pos, unsigned len, unsigned flags,
3191 struct page **pagep, void **fsdata)
3192{
3193 struct inode *inode = mapping->host;
4081363f 3194 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86531d6b 3195 struct page *page = NULL;
09cbfeaf 3196 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
a2e2e76b 3197 bool need_balance = false, drop_atomic = false;
2aadac08 3198 block_t blkaddr = NULL_ADDR;
eb47b800
JK		 3199 int err = 0;
3200
62aed044
CY		 3201 trace_f2fs_write_begin(inode, pos, len, flags);
3202
00e09c0b
CY		 3203 if (!f2fs_is_checkpoint_ready(sbi)) {
3204 err = -ENOSPC;
4354994f 3205 goto fail;
00e09c0b 3206 }
4354994f 3207
455e3a58
JK		 3208 if ((f2fs_is_atomic_file(inode) &&
3209 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3210 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
57864ae5 3211 err = -ENOMEM;
a2e2e76b 3212 drop_atomic = true;
57864ae5
JK		 3213 goto fail;
3214 }
3215
5f727395
JK		 3216 /*
3217 * We should check this at this moment to avoid deadlock on inode page
3218 * and #0 page. The locking rule for inline_data conversion should be:
3219 * lock_page(page #0) -> lock_page(inode_page)
3220 */
3221 if (index != 0) {
3222 err = f2fs_convert_inline_inode(inode);
3223 if (err)
3224 goto fail;
3225 }
4c8ff709
CY		 3226
3227#ifdef CONFIG_F2FS_FS_COMPRESSION
3228 if (f2fs_compressed_file(inode)) {
3229 int ret;
3230
3231 *fsdata = NULL;
3232
3233 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3234 index, fsdata);
3235 if (ret < 0) {
3236 err = ret;
3237 goto fail;
3238 } else if (ret) {
3239 return 0;
3240 }
3241 }
3242#endif
3243
afcb7ca0 3244repeat:
86d54795
JK		 3245 /*
3246 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
3247 * wait_for_stable_page. Will wait that below with our IO control.
3248 */
01eccef7 3249 page = f2fs_pagecache_get_page(mapping, index,
86d54795 3250 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3aab8f82
CY		 3251 if (!page) {
3252 err = -ENOMEM;
3253 goto fail;
3254 }
d5f66990 3255
4c8ff709
CY		 3256 /* TODO: cluster can be compressed due to race with .writepage */
3257
eb47b800
JK		 3258 *pagep = page;
3259
2aadac08
JK		 3260 err = prepare_write_begin(sbi, page, pos, len,
3261 &blkaddr, &need_balance);
9ba69cf9 3262 if (err)
2aadac08 3263 goto fail;
9ba69cf9 3264
af033b2a
CY		 3265 if (need_balance && !IS_NOQUOTA(inode) &&
3266 has_not_enough_free_secs(sbi, 0, 0)) {
2a340760 3267 unlock_page(page);
2c4db1a6 3268 f2fs_balance_fs(sbi, true);
2a340760
JK		 3269 lock_page(page);
3270 if (page->mapping != mapping) {
3271 /* The page got truncated from under us */
3272 f2fs_put_page(page, 1);
3273 goto repeat;
3274 }
3275 }
3276
bae0ee7a 3277 f2fs_wait_on_page_writeback(page, DATA, false, true);
b3d208f9 3278
649d7df2
JK		 3279 if (len == PAGE_SIZE || PageUptodate(page))
3280 return 0;
eb47b800 3281
95ae251f
EB		 3282 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3283 !f2fs_verity_in_progress(inode)) {
746e2403
YH		 3284 zero_user_segment(page, len, PAGE_SIZE);
3285 return 0;
3286 }
3287
2aadac08 3288 if (blkaddr == NEW_ADDR) {
09cbfeaf 3289 zero_user_segment(page, 0, PAGE_SIZE);
649d7df2 3290 SetPageUptodate(page);
eb47b800 3291 } else {
93770ab7
CY		 3292 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3293 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 3294 err = -EFSCORRUPTED;
93770ab7
CY		 3295 goto fail;
3296 }
0683728a 3297 err = f2fs_submit_page_read(inode, page, blkaddr, true);
13ba41e3 3298 if (err)
78682f79 3299 goto fail;
d54c795b 3300
393ff91f 3301 lock_page(page);
6bacf52f 3302 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 3303 f2fs_put_page(page, 1);
3304 goto repeat;
eb47b800 3305 }
1563ac75
CY		 3306 if (unlikely(!PageUptodate(page))) {
3307 err = -EIO;
3308 goto fail;
4375a336 3309 }
eb47b800 3310 }
eb47b800 3311 return 0;
9ba69cf9 3312
3aab8f82 3313fail:
86531d6b 3314 f2fs_put_page(page, 1);
3aab8f82 3315 f2fs_write_failed(mapping, pos + len);
a2e2e76b 3316 if (drop_atomic)
4d57b86d 3317 f2fs_drop_inmem_pages_all(sbi, false);
3aab8f82 3318 return err;
eb47b800
JK		 3319}
3320
a1dd3c13
JK		 3321static int f2fs_write_end(struct file *file,
3322 struct address_space *mapping,
3323 loff_t pos, unsigned len, unsigned copied,
3324 struct page *page, void *fsdata)
3325{
3326 struct inode *inode = page->mapping->host;
3327
dfb2bf38
CY		 3328 trace_f2fs_write_end(inode, pos, len, copied);
3329
649d7df2
JK		 3330 /*
3331 * This should be come from len == PAGE_SIZE, and we expect copied
3332 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
3333 * let generic_perform_write() try to copy data again through copied=0.
3334 */
3335 if (!PageUptodate(page)) {
746e2403 3336 if (unlikely(copied != len))
649d7df2
JK		 3337 copied = 0;
3338 else
3339 SetPageUptodate(page);
3340 }
4c8ff709
CY		 3341
3342#ifdef CONFIG_F2FS_FS_COMPRESSION
3343 /* overwrite compressed file */
3344 if (f2fs_compressed_file(inode) && fsdata) {
3345 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3346 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3347 return copied;
3348 }
3349#endif
3350
649d7df2
JK		 3351 if (!copied)
3352 goto unlock_out;
3353
34ba94ba 3354 set_page_dirty(page);
a1dd3c13 3355
95ae251f
EB		 3356 if (pos + copied > i_size_read(inode) &&
3357 !f2fs_verity_in_progress(inode))
fc9581c8 3358 f2fs_i_size_write(inode, pos + copied);
649d7df2 3359unlock_out:
3024c9a1 3360 f2fs_put_page(page, 1);
d0239e1b 3361 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
a1dd3c13
JK		 3362 return copied;
3363}
3364
6f673763
OS		 3365static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
3366 loff_t offset)
944fcfc1 3367{
8a56dd96
JK		 3368 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
3369 unsigned blkbits = i_blkbits;
3370 unsigned blocksize_mask = (1 << blkbits) - 1;
3371 unsigned long align = offset | iov_iter_alignment(iter);
3372 struct block_device *bdev = inode->i_sb->s_bdev;
3373
3374 if (align & blocksize_mask) {
3375 if (bdev)
3376 blkbits = blksize_bits(bdev_logical_block_size(bdev));
3377 blocksize_mask = (1 << blkbits) - 1;
3378 if (align & blocksize_mask)
3379 return -EINVAL;
3380 return 1;
3381 }
944fcfc1
JK		 3382 return 0;
3383}
3384
02b16d0a
CY		 3385static void f2fs_dio_end_io(struct bio *bio)
3386{
3387 struct f2fs_private_dio *dio = bio->bi_private;
3388
3389 dec_page_count(F2FS_I_SB(dio->inode),
3390 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3391
3392 bio->bi_private = dio->orig_private;
3393 bio->bi_end_io = dio->orig_end_io;
3394
5222595d 3395 kvfree(dio);
02b16d0a
CY		 3396
3397 bio_endio(bio);
3398}
3399
3400static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
3401 loff_t file_offset)
3402{
3403 struct f2fs_private_dio *dio;
3404 bool write = (bio_op(bio) == REQ_OP_WRITE);
02b16d0a
CY		 3405
3406 dio = f2fs_kzalloc(F2FS_I_SB(inode),
3407 sizeof(struct f2fs_private_dio), GFP_NOFS);
8e114038 3408 if (!dio)
02b16d0a 3409 goto out;
02b16d0a
CY		 3410
3411 dio->inode = inode;
3412 dio->orig_end_io = bio->bi_end_io;
3413 dio->orig_private = bio->bi_private;
3414 dio->write = write;
3415
3416 bio->bi_end_io = f2fs_dio_end_io;
3417 bio->bi_private = dio;
3418
3419 inc_page_count(F2FS_I_SB(inode),
3420 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3421
3422 submit_bio(bio);
3423 return;
3424out:
3425 bio->bi_status = BLK_STS_IOERR;
3426 bio_endio(bio);
3427}
3428
c8b8e32d 3429static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
eb47b800 3430{
b439b103 3431 struct address_space *mapping = iocb->ki_filp->f_mapping;
3aab8f82 3432 struct inode *inode = mapping->host;
0cdd3195 3433 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f847c699 3434 struct f2fs_inode_info *fi = F2FS_I(inode);
3aab8f82 3435 size_t count = iov_iter_count(iter);
c8b8e32d 3436 loff_t offset = iocb->ki_pos;
82e0a5aa 3437 int rw = iov_iter_rw(iter);
3aab8f82 3438 int err;
0cdd3195 3439 enum rw_hint hint = iocb->ki_hint;
63189b78 3440 int whint_mode = F2FS_OPTION(sbi).whint_mode;
f847c699 3441 bool do_opu;
944fcfc1 3442
b439b103 3443 err = check_direct_IO(inode, iter, offset);
b9d777b8 3444 if (err)
8a56dd96 3445 return err < 0 ? err : 0;
9ffe0fb5 3446
f847c699 3447 if (f2fs_force_buffered_io(inode, iocb, iter))
36abef4e 3448 return 0;
fcc85a4d 3449
f847c699
CY		 3450 do_opu = allow_outplace_dio(inode, iocb, iter);
3451
5302fb00 3452 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
70407fad 3453
0cdd3195
HL		 3454 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
3455 iocb->ki_hint = WRITE_LIFE_NOT_SET;
3456
f847c699
CY		 3457 if (iocb->ki_flags & IOCB_NOWAIT) {
3458 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
3459 iocb->ki_hint = hint;
3460 err = -EAGAIN;
3461 goto out;
3462 }
3463 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
3464 up_read(&fi->i_gc_rwsem[rw]);
b91050a8
HL		 3465 iocb->ki_hint = hint;
3466 err = -EAGAIN;
3467 goto out;
3468 }
f847c699
CY		 3469 } else {
3470 down_read(&fi->i_gc_rwsem[rw]);
3471 if (do_opu)
3472 down_read(&fi->i_gc_rwsem[READ]);
b91050a8
HL		 3473 }
3474
02b16d0a 3475 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
f9d6d059
CY		 3476 iter, rw == WRITE ? get_data_block_dio_write :
3477 get_data_block_dio, NULL, f2fs_dio_submit_bio,
ad8d6a02
D		 3478 rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
3479 DIO_SKIP_HOLES);
f847c699
CY		 3480
3481 if (do_opu)
3482 up_read(&fi->i_gc_rwsem[READ]);
3483
3484 up_read(&fi->i_gc_rwsem[rw]);
82e0a5aa
CY		 3485
3486 if (rw == WRITE) {
0cdd3195
HL		 3487 if (whint_mode == WHINT_MODE_OFF)
3488 iocb->ki_hint = hint;
b0af6d49
CY		 3489 if (err > 0) {
3490 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3491 err);
f847c699
CY		 3492 if (!do_opu)
3493 set_inode_flag(inode, FI_UPDATE_WRITE);
b0af6d49 3494 } else if (err < 0) {
6bfc4919 3495 f2fs_write_failed(mapping, offset + count);
b0af6d49 3496 }
6bfc4919 3497 }
70407fad 3498
b91050a8 3499out:
5302fb00 3500 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
70407fad 3501
3aab8f82 3502 return err;
eb47b800
JK		 3503}
3504
487261f3
CY		 3505void f2fs_invalidate_page(struct page *page, unsigned int offset,
3506 unsigned int length)
eb47b800
JK		 3507{
3508 struct inode *inode = page->mapping->host;
487261f3 3509 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
a7ffdbe2 3510
487261f3 3511 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
09cbfeaf 3512 (offset % PAGE_SIZE || length != PAGE_SIZE))
a7ffdbe2
JK		 3513 return;
3514
487261f3 3515 if (PageDirty(page)) {
933439c8 3516 if (inode->i_ino == F2FS_META_INO(sbi)) {
487261f3 3517 dec_page_count(sbi, F2FS_DIRTY_META);
933439c8 3518 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
487261f3 3519 dec_page_count(sbi, F2FS_DIRTY_NODES);
933439c8 3520 } else {
487261f3 3521 inode_dec_dirty_pages(inode);
4d57b86d 3522 f2fs_remove_dirty_inode(inode);
933439c8 3523 }
487261f3 3524 }
decd36b6 3525
2baf0781
CY		 3526 clear_cold_data(page);
3527
decd36b6 3528 if (IS_ATOMIC_WRITTEN_PAGE(page))
4d57b86d 3529 return f2fs_drop_inmem_page(inode, page);
decd36b6 3530
240a5915 3531 f2fs_clear_page_private(page);
eb47b800
JK		 3532}
3533
487261f3 3534int f2fs_release_page(struct page *page, gfp_t wait)
eb47b800 3535{
f68daeeb
JK		 3536 /* If this is dirty page, keep PagePrivate */
3537 if (PageDirty(page))
3538 return 0;
3539
decd36b6
CY		 3540 /* This is atomic written page, keep Private */
3541 if (IS_ATOMIC_WRITTEN_PAGE(page))
3542 return 0;
3543
2baf0781 3544 clear_cold_data(page);
240a5915 3545 f2fs_clear_page_private(page);
c3850aa1 3546 return 1;
eb47b800
JK		 3547}
3548
3549static int f2fs_set_data_page_dirty(struct page *page)
3550{
4969c06a 3551 struct inode *inode = page_file_mapping(page)->host;
eb47b800 3552
26c6b887
JK		 3553 trace_f2fs_set_page_dirty(page, DATA);
3554
237c0790
JK		 3555 if (!PageUptodate(page))
3556 SetPageUptodate(page);
4969c06a
JK		 3557 if (PageSwapCache(page))
3558 return __set_page_dirty_nobuffers(page);
34ba94ba 3559
5fe45743 3560 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
decd36b6 3561 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
4d57b86d 3562 f2fs_register_inmem_page(inode, page);
decd36b6
CY		 3563 return 1;
3564 }
3565 /*
3566 * Previously, this page has been registered, we just
3567 * return here.
3568 */
3569 return 0;
34ba94ba
JK		 3570 }
3571
eb47b800 3572 if (!PageDirty(page)) {
b87078ad 3573 __set_page_dirty_nobuffers(page);
4d57b86d 3574 f2fs_update_dirty_page(inode, page);
eb47b800
JK		 3575 return 1;
3576 }
3577 return 0;
3578}
3579
c01e54b7
JK		 3580static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3581{
454ae7e5
CY		 3582 struct inode *inode = mapping->host;
3583
1d373a0e
JK		 3584 if (f2fs_has_inline_data(inode))
3585 return 0;
3586
3587 /* make sure allocating whole blocks */
3588 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3589 filemap_write_and_wait(mapping);
3590
e2b4e2bc 3591 return generic_block_bmap(mapping, block, get_data_block_bmap);
429511cd
CY		 3592}
3593
5b7a487c
WG		 3594#ifdef CONFIG_MIGRATION
3595#include <linux/migrate.h>
3596
3597int f2fs_migrate_page(struct address_space *mapping,
3598 struct page *newpage, struct page *page, enum migrate_mode mode)
3599{
3600 int rc, extra_count;
3601 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3602 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
3603
3604 BUG_ON(PageWriteback(page));
3605
3606 /* migrating an atomic written page is safe with the inmem_lock hold */
ff1048e7
JK		 3607 if (atomic_written) {
3608 if (mode != MIGRATE_SYNC)
3609 return -EBUSY;
3610 if (!mutex_trylock(&fi->inmem_lock))
3611 return -EAGAIN;
3612 }
5b7a487c 3613
240a5915
CY		 3614 /* one extra reference was held for atomic_write page */
3615 extra_count = atomic_written ? 1 : 0;
5b7a487c 3616 rc = migrate_page_move_mapping(mapping, newpage,
37109694 3617 page, extra_count);
5b7a487c
WG		 3618 if (rc != MIGRATEPAGE_SUCCESS) {
3619 if (atomic_written)
3620 mutex_unlock(&fi->inmem_lock);
3621 return rc;
3622 }
3623
3624 if (atomic_written) {
3625 struct inmem_pages *cur;
3626 list_for_each_entry(cur, &fi->inmem_pages, list)
3627 if (cur->page == page) {
3628 cur->page = newpage;
3629 break;
3630 }
3631 mutex_unlock(&fi->inmem_lock);
3632 put_page(page);
3633 get_page(newpage);
3634 }
3635
240a5915
CY		 3636 if (PagePrivate(page)) {
3637 f2fs_set_page_private(newpage, page_private(page));
3638 f2fs_clear_page_private(page);
3639 }
5b7a487c 3640
2916ecc0
JG		 3641 if (mode != MIGRATE_SYNC_NO_COPY)
3642 migrate_page_copy(newpage, page);
3643 else
3644 migrate_page_states(newpage, page);
5b7a487c
WG		 3645
3646 return MIGRATEPAGE_SUCCESS;
3647}
3648#endif
3649
4969c06a
JK		 3650#ifdef CONFIG_SWAP
3651/* Copied from generic_swapfile_activate() to check any holes */
3e5e479a
CY		 3652static int check_swap_activate(struct swap_info_struct *sis,
3653 struct file *swap_file, sector_t *span)
4969c06a
JK		 3654{
3655 struct address_space *mapping = swap_file->f_mapping;
3656 struct inode *inode = mapping->host;
3657 unsigned blocks_per_page;
3658 unsigned long page_no;
3659 unsigned blkbits;
3660 sector_t probe_block;
3661 sector_t last_block;
3662 sector_t lowest_block = -1;
3663 sector_t highest_block = 0;
3e5e479a
CY		 3664 int nr_extents = 0;
3665 int ret;
4969c06a
JK		 3666
3667 blkbits = inode->i_blkbits;
3668 blocks_per_page = PAGE_SIZE >> blkbits;
3669
3670 /*
3671 * Map all the blocks into the extent list. This code doesn't try
3672 * to be very smart.
3673 */
3674 probe_block = 0;
3675 page_no = 0;
3676 last_block = i_size_read(inode) >> blkbits;
3e5e479a
CY		 3677 while ((probe_block + blocks_per_page) <= last_block &&
3678 page_no < sis->max) {
4969c06a
JK		 3679 unsigned block_in_page;
3680 sector_t first_block;
30460e1e
CM		 3681 sector_t block = 0;
3682 int err = 0;
4969c06a
JK		 3683
3684 cond_resched();
3685
30460e1e
CM		 3686 block = probe_block;
3687 err = bmap(inode, &block);
3688 if (err || !block)
4969c06a 3689 goto bad_bmap;
30460e1e 3690 first_block = block;
4969c06a
JK		 3691
3692 /*
3693 * It must be PAGE_SIZE aligned on-disk
3694 */
3695 if (first_block & (blocks_per_page - 1)) {
3696 probe_block++;
3697 goto reprobe;
3698 }
3699
3700 for (block_in_page = 1; block_in_page < blocks_per_page;
3701 block_in_page++) {
4969c06a 3702
30460e1e
CM		 3703 block = probe_block + block_in_page;
3704 err = bmap(inode, &block);
3705
3706 if (err || !block)
4969c06a 3707 goto bad_bmap;
30460e1e 3708
4969c06a
JK		 3709 if (block != first_block + block_in_page) {
3710 /* Discontiguity */
3711 probe_block++;
3712 goto reprobe;
3713 }
3714 }
3715
3716 first_block >>= (PAGE_SHIFT - blkbits);
3717 if (page_no) { /* exclude the header page */
3718 if (first_block < lowest_block)
3719 lowest_block = first_block;
3720 if (first_block > highest_block)
3721 highest_block = first_block;
3722 }
3723
3e5e479a
CY		 3724 /*
3725 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3726 */
3727 ret = add_swap_extent(sis, page_no, 1, first_block);
3728 if (ret < 0)
3729 goto out;
3730 nr_extents += ret;
4969c06a
JK		 3731 page_no++;
3732 probe_block += blocks_per_page;
3733reprobe:
3734 continue;
3735 }
3e5e479a
CY		 3736 ret = nr_extents;
3737 *span = 1 + highest_block - lowest_block;
3738 if (page_no == 0)
3739 page_no = 1; /* force Empty message */
3740 sis->max = page_no;
3741 sis->pages = page_no - 1;
3742 sis->highest_bit = page_no - 1;
3743out:
3744 return ret;
4969c06a
JK		 3745bad_bmap:
3746 pr_err("swapon: swapfile has holes\n");
3747 return -EINVAL;
3748}
3749
3750static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3751 sector_t *span)
3752{
3753 struct inode *inode = file_inode(file);
3754 int ret;
3755
3756 if (!S_ISREG(inode->i_mode))
3757 return -EINVAL;
3758
3759 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3760 return -EROFS;
3761
3762 ret = f2fs_convert_inline_inode(inode);
3763 if (ret)
3764 return ret;
3765
4c8ff709
CY		 3766 if (f2fs_disable_compressed_file(inode))
3767 return -EINVAL;
3768
3e5e479a
CY		 3769 ret = check_swap_activate(sis, file, span);
3770 if (ret < 0)
4969c06a
JK		 3771 return ret;
3772
3773 set_inode_flag(inode, FI_PIN_FILE);
3774 f2fs_precache_extents(inode);
3775 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3e5e479a 3776 return ret;
4969c06a
JK		 3777}
3778
3779static void f2fs_swap_deactivate(struct file *file)
3780{
3781 struct inode *inode = file_inode(file);
3782
3783 clear_inode_flag(inode, FI_PIN_FILE);
3784}
3785#else
3786static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3787 sector_t *span)
3788{
3789 return -EOPNOTSUPP;
3790}
3791
3792static void f2fs_swap_deactivate(struct file *file)
3793{
3794}
3795#endif
3796
eb47b800
JK		 3797const struct address_space_operations f2fs_dblock_aops = {
3798 .readpage = f2fs_read_data_page,
23323196 3799 .readahead = f2fs_readahead,
eb47b800
JK		 3800 .writepage = f2fs_write_data_page,
3801 .writepages = f2fs_write_data_pages,
3802 .write_begin = f2fs_write_begin,
a1dd3c13 3803 .write_end = f2fs_write_end,
eb47b800 3804 .set_page_dirty = f2fs_set_data_page_dirty,
487261f3
CY		 3805 .invalidatepage = f2fs_invalidate_page,
3806 .releasepage = f2fs_release_page,
eb47b800 3807 .direct_IO = f2fs_direct_IO,
c01e54b7 3808 .bmap = f2fs_bmap,
4969c06a
JK		 3809 .swap_activate = f2fs_swap_activate,
3810 .swap_deactivate = f2fs_swap_deactivate,
5b7a487c
WG		 3811#ifdef CONFIG_MIGRATION
3812 .migratepage = f2fs_migrate_page,
3813#endif
eb47b800 3814};
6dbb1796 3815
5ec2d99d 3816void f2fs_clear_page_cache_dirty_tag(struct page *page)
aec2f729
CY		 3817{
3818 struct address_space *mapping = page_mapping(page);
3819 unsigned long flags;
3820
3821 xa_lock_irqsave(&mapping->i_pages, flags);
5ec2d99d 3822 __xa_clear_mark(&mapping->i_pages, page_index(page),
aec2f729
CY		 3823 PAGECACHE_TAG_DIRTY);
3824 xa_unlock_irqrestore(&mapping->i_pages, flags);
3825}
3826
6dbb1796
EB		 3827int __init f2fs_init_post_read_processing(void)
3828{
95ae251f
EB		 3829 bio_post_read_ctx_cache =
3830 kmem_cache_create("f2fs_bio_post_read_ctx",
3831 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
6dbb1796
EB		 3832 if (!bio_post_read_ctx_cache)
3833 goto fail;
3834 bio_post_read_ctx_pool =
3835 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3836 bio_post_read_ctx_cache);
3837 if (!bio_post_read_ctx_pool)
3838 goto fail_free_cache;
3839 return 0;
3840
3841fail_free_cache:
3842 kmem_cache_destroy(bio_post_read_ctx_cache);
3843fail:
3844 return -ENOMEM;
3845}
3846
0b20fcec 3847void f2fs_destroy_post_read_processing(void)
6dbb1796
EB		 3848{
3849 mempool_destroy(bio_post_read_ctx_pool);
3850 kmem_cache_destroy(bio_post_read_ctx_cache);
3851}
0b20fcec 3852
4c8ff709
CY		 3853int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
3854{
3855 if (!f2fs_sb_has_encrypt(sbi) &&
3856 !f2fs_sb_has_verity(sbi) &&
3857 !f2fs_sb_has_compression(sbi))
3858 return 0;
3859
3860 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
3861 WQ_UNBOUND | WQ_HIGHPRI,
3862 num_online_cpus());
3863 if (!sbi->post_read_wq)
3864 return -ENOMEM;
3865 return 0;
3866}
3867
3868void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
3869{
3870 if (sbi->post_read_wq)
3871 destroy_workqueue(sbi->post_read_wq);
3872}
3873
0b20fcec
CY		 3874int __init f2fs_init_bio_entry_cache(void)
3875{
98510003 3876 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
0b20fcec
CY		 3877 sizeof(struct bio_entry));
3878 if (!bio_entry_slab)
3879 return -ENOMEM;
3880 return 0;
3881}
3882
f543805f 3883void f2fs_destroy_bio_entry_cache(void)
0b20fcec
CY		 3884{
3885 kmem_cache_destroy(bio_entry_slab);
3886}
Michael's Linux tree.