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media: sur40: Remove uninitialized_var() usage
[people/ms/linux.git] / fs / f2fs / data.c
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7c1a000d 1// SPDX-License-Identifier: GPL-2.0
0a8165d7 2/*
eb47b800
JK		 3 * fs/f2fs/data.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
eb47b800
JK		 7 */
8#include <linux/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/buffer_head.h>
11#include <linux/mpage.h>
12#include <linux/writeback.h>
13#include <linux/backing-dev.h>
8f46dcae 14#include <linux/pagevec.h>
eb47b800
JK		 15#include <linux/blkdev.h>
16#include <linux/bio.h>
4969c06a 17#include <linux/swap.h>
690e4a3e 18#include <linux/prefetch.h>
e2e40f2c 19#include <linux/uio.h>
f1e88660 20#include <linux/cleancache.h>
174cd4b1 21#include <linux/sched/signal.h>
10c5db28 22#include <linux/fiemap.h>
eb47b800
JK		 23
24#include "f2fs.h"
25#include "node.h"
26#include "segment.h"
db9f7c1a 27#include "trace.h"
848753aa 28#include <trace/events/f2fs.h>
eb47b800 29
6dbb1796
EB		 30#define NUM_PREALLOC_POST_READ_CTXS 128
31
32static struct kmem_cache *bio_post_read_ctx_cache;
0b20fcec 33static struct kmem_cache *bio_entry_slab;
6dbb1796 34static mempool_t *bio_post_read_ctx_pool;
f543805f
CY		 35static struct bio_set f2fs_bioset;
36
37#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
38
39int __init f2fs_init_bioset(void)
40{
41 if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
42 0, BIOSET_NEED_BVECS))
43 return -ENOMEM;
44 return 0;
45}
46
47void f2fs_destroy_bioset(void)
48{
49 bioset_exit(&f2fs_bioset);
50}
51
52static inline struct bio *__f2fs_bio_alloc(gfp_t gfp_mask,
53 unsigned int nr_iovecs)
54{
55 return bio_alloc_bioset(gfp_mask, nr_iovecs, &f2fs_bioset);
56}
57
ca9e968a 58struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi, int npages, bool noio)
f543805f 59{
ca9e968a 60 if (noio) {
f543805f 61 /* No failure on bio allocation */
ca9e968a 62 return __f2fs_bio_alloc(GFP_NOIO, npages);
f543805f 63 }
ca9e968a 64
f543805f
CY		 65 if (time_to_inject(sbi, FAULT_ALLOC_BIO)) {
66 f2fs_show_injection_info(sbi, FAULT_ALLOC_BIO);
67 return NULL;
68 }
69
70 return __f2fs_bio_alloc(GFP_KERNEL, npages);
71}
6dbb1796 72
36951b38
CY		 73static bool __is_cp_guaranteed(struct page *page)
74{
75 struct address_space *mapping = page->mapping;
76 struct inode *inode;
77 struct f2fs_sb_info *sbi;
78
79 if (!mapping)
80 return false;
81
4c8ff709
CY		 82 if (f2fs_is_compressed_page(page))
83 return false;
84
36951b38
CY		 85 inode = mapping->host;
86 sbi = F2FS_I_SB(inode);
87
88 if (inode->i_ino == F2FS_META_INO(sbi) ||
89 inode->i_ino == F2FS_NODE_INO(sbi) ||
90 S_ISDIR(inode->i_mode) ||
e7a4feb0 91 (S_ISREG(inode->i_mode) &&
af033b2a 92 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
36951b38
CY		 93 is_cold_data(page))
94 return true;
95 return false;
96}
97
5f9abab4
JK		 98static enum count_type __read_io_type(struct page *page)
99{
4969c06a 100 struct address_space *mapping = page_file_mapping(page);
5f9abab4
JK		 101
102 if (mapping) {
103 struct inode *inode = mapping->host;
104 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
105
106 if (inode->i_ino == F2FS_META_INO(sbi))
107 return F2FS_RD_META;
108
109 if (inode->i_ino == F2FS_NODE_INO(sbi))
110 return F2FS_RD_NODE;
111 }
112 return F2FS_RD_DATA;
113}
114
6dbb1796
EB		 115/* postprocessing steps for read bios */
116enum bio_post_read_step {
6dbb1796 117 STEP_DECRYPT,
03382f1a
CY		 118 STEP_DECOMPRESS_NOWQ, /* handle normal cluster data inplace */
119 STEP_DECOMPRESS, /* handle compressed cluster data in workqueue */
95ae251f 120 STEP_VERITY,
6dbb1796
EB		 121};
122
123struct bio_post_read_ctx {
124 struct bio *bio;
4c8ff709 125 struct f2fs_sb_info *sbi;
6dbb1796 126 struct work_struct work;
6dbb1796
EB		 127 unsigned int enabled_steps;
128};
129
4c8ff709 130static void __read_end_io(struct bio *bio, bool compr, bool verity)
93dfe2ac 131{
6dbb1796
EB		 132 struct page *page;
133 struct bio_vec *bv;
6dc4f100 134 struct bvec_iter_all iter_all;
93dfe2ac 135
2b070cfe 136 bio_for_each_segment_all(bv, bio, iter_all) {
6dbb1796
EB		 137 page = bv->bv_page;
138
4c8ff709
CY		 139#ifdef CONFIG_F2FS_FS_COMPRESSION
140 if (compr && f2fs_is_compressed_page(page)) {
141 f2fs_decompress_pages(bio, page, verity);
142 continue;
143 }
74878565
CY		 144 if (verity)
145 continue;
4c8ff709
CY		 146#endif
147
6dbb1796
EB		 148 /* PG_error was set if any post_read step failed */
149 if (bio->bi_status || PageError(page)) {
150 ClearPageUptodate(page);
fb7d70db
JK		 151 /* will re-read again later */
152 ClearPageError(page);
6dbb1796
EB		 153 } else {
154 SetPageUptodate(page);
155 }
5f9abab4 156 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
6dbb1796
EB		 157 unlock_page(page);
158 }
4c8ff709
CY		 159}
160
161static void f2fs_release_read_bio(struct bio *bio);
162static void __f2fs_read_end_io(struct bio *bio, bool compr, bool verity)
163{
164 if (!compr)
165 __read_end_io(bio, false, verity);
166 f2fs_release_read_bio(bio);
167}
168
169static void f2fs_decompress_bio(struct bio *bio, bool verity)
170{
171 __read_end_io(bio, true, verity);
6dbb1796
EB		 172}
173
174static void bio_post_read_processing(struct bio_post_read_ctx *ctx);
175
4c8ff709
CY		 176static void f2fs_decrypt_work(struct bio_post_read_ctx *ctx)
177{
178 fscrypt_decrypt_bio(ctx->bio);
179}
180
181static void f2fs_decompress_work(struct bio_post_read_ctx *ctx)
182{
183 f2fs_decompress_bio(ctx->bio, ctx->enabled_steps & (1 << STEP_VERITY));
184}
185
186#ifdef CONFIG_F2FS_FS_COMPRESSION
187static void f2fs_verify_pages(struct page **rpages, unsigned int cluster_size)
188{
189 f2fs_decompress_end_io(rpages, cluster_size, false, true);
190}
191
192static void f2fs_verify_bio(struct bio *bio)
193{
79bbefb1
CY		 194 struct bio_vec *bv;
195 struct bvec_iter_all iter_all;
196
197 bio_for_each_segment_all(bv, bio, iter_all) {
198 struct page *page = bv->bv_page;
199 struct decompress_io_ctx *dic;
4c8ff709 200
79bbefb1
CY		 201 dic = (struct decompress_io_ctx *)page_private(page);
202
203 if (dic) {
204 if (refcount_dec_not_one(&dic->ref))
205 continue;
206 f2fs_verify_pages(dic->rpages,
207 dic->cluster_size);
208 f2fs_free_dic(dic);
209 continue;
210 }
211
212 if (bio->bi_status || PageError(page))
213 goto clear_uptodate;
214
215 if (fsverity_verify_page(page)) {
216 SetPageUptodate(page);
217 goto unlock;
218 }
219clear_uptodate:
220 ClearPageUptodate(page);
221 ClearPageError(page);
222unlock:
74878565 223 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
79bbefb1
CY		 224 unlock_page(page);
225 }
4c8ff709
CY		 226}
227#endif
228
229static void f2fs_verity_work(struct work_struct *work)
6dbb1796
EB		 230{
231 struct bio_post_read_ctx *ctx =
232 container_of(work, struct bio_post_read_ctx, work);
644c8c92
EB		 233 struct bio *bio = ctx->bio;
234#ifdef CONFIG_F2FS_FS_COMPRESSION
235 unsigned int enabled_steps = ctx->enabled_steps;
236#endif
237
238 /*
239 * fsverity_verify_bio() may call readpages() again, and while verity
240 * will be disabled for this, decryption may still be needed, resulting
241 * in another bio_post_read_ctx being allocated. So to prevent
242 * deadlocks we need to release the current ctx to the mempool first.
243 * This assumes that verity is the last post-read step.
244 */
245 mempool_free(ctx, bio_post_read_ctx_pool);
246 bio->bi_private = NULL;
6dbb1796 247
4c8ff709
CY		 248#ifdef CONFIG_F2FS_FS_COMPRESSION
249 /* previous step is decompression */
644c8c92
EB		 250 if (enabled_steps & (1 << STEP_DECOMPRESS)) {
251 f2fs_verify_bio(bio);
252 f2fs_release_read_bio(bio);
4c8ff709
CY		 253 return;
254 }
255#endif
6dbb1796 256
644c8c92
EB		 257 fsverity_verify_bio(bio);
258 __f2fs_read_end_io(bio, false, false);
6dbb1796
EB		 259}
260
4c8ff709 261static void f2fs_post_read_work(struct work_struct *work)
95ae251f
EB		 262{
263 struct bio_post_read_ctx *ctx =
264 container_of(work, struct bio_post_read_ctx, work);
265
4c8ff709
CY		 266 if (ctx->enabled_steps & (1 << STEP_DECRYPT))
267 f2fs_decrypt_work(ctx);
268
269 if (ctx->enabled_steps & (1 << STEP_DECOMPRESS))
270 f2fs_decompress_work(ctx);
271
272 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
273 INIT_WORK(&ctx->work, f2fs_verity_work);
274 fsverity_enqueue_verify_work(&ctx->work);
275 return;
276 }
277
278 __f2fs_read_end_io(ctx->bio,
279 ctx->enabled_steps & (1 << STEP_DECOMPRESS), false);
280}
95ae251f 281
4c8ff709
CY		 282static void f2fs_enqueue_post_read_work(struct f2fs_sb_info *sbi,
283 struct work_struct *work)
284{
285 queue_work(sbi->post_read_wq, work);
95ae251f
EB		 286}
287
6dbb1796
EB		 288static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
289{
95ae251f
EB		 290 /*
291 * We use different work queues for decryption and for verity because
292 * verity may require reading metadata pages that need decryption, and
293 * we shouldn't recurse to the same workqueue.
294 */
4c8ff709
CY		 295
296 if (ctx->enabled_steps & (1 << STEP_DECRYPT) ||
297 ctx->enabled_steps & (1 << STEP_DECOMPRESS)) {
298 INIT_WORK(&ctx->work, f2fs_post_read_work);
299 f2fs_enqueue_post_read_work(ctx->sbi, &ctx->work);
300 return;
301 }
302
303 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
304 INIT_WORK(&ctx->work, f2fs_verity_work);
305 fsverity_enqueue_verify_work(&ctx->work);
306 return;
6dbb1796 307 }
4c8ff709
CY		 308
309 __f2fs_read_end_io(ctx->bio, false, false);
6dbb1796
EB		 310}
311
312static bool f2fs_bio_post_read_required(struct bio *bio)
313{
4c8ff709 314 return bio->bi_private;
6dbb1796
EB		 315}
316
317static void f2fs_read_end_io(struct bio *bio)
318{
c45d6002
CY		 319 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
320
321 if (time_to_inject(sbi, FAULT_READ_IO)) {
322 f2fs_show_injection_info(sbi, FAULT_READ_IO);
4e4cbee9 323 bio->bi_status = BLK_STS_IOERR;
55523519 324 }
8b038c70 325
6dbb1796
EB		 326 if (f2fs_bio_post_read_required(bio)) {
327 struct bio_post_read_ctx *ctx = bio->bi_private;
f1e88660 328
6dbb1796
EB		 329 bio_post_read_processing(ctx);
330 return;
f1e88660 331 }
6dbb1796 332
4c8ff709 333 __f2fs_read_end_io(bio, false, false);
f1e88660
JK		 334}
335
4246a0b6 336static void f2fs_write_end_io(struct bio *bio)
93dfe2ac 337{
1b1f559f 338 struct f2fs_sb_info *sbi = bio->bi_private;
f568849e 339 struct bio_vec *bvec;
6dc4f100 340 struct bvec_iter_all iter_all;
93dfe2ac 341
6f5c2ed0 342 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
c45d6002 343 f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
6f5c2ed0
CY		 344 bio->bi_status = BLK_STS_IOERR;
345 }
346
2b070cfe 347 bio_for_each_segment_all(bvec, bio, iter_all) {
93dfe2ac 348 struct page *page = bvec->bv_page;
36951b38 349 enum count_type type = WB_DATA_TYPE(page);
93dfe2ac 350
0a595eba
JK		 351 if (IS_DUMMY_WRITTEN_PAGE(page)) {
352 set_page_private(page, (unsigned long)NULL);
353 ClearPagePrivate(page);
354 unlock_page(page);
355 mempool_free(page, sbi->write_io_dummy);
356
4e4cbee9 357 if (unlikely(bio->bi_status))
0a595eba
JK		 358 f2fs_stop_checkpoint(sbi, true);
359 continue;
360 }
361
d2d0727b 362 fscrypt_finalize_bounce_page(&page);
4375a336 363
4c8ff709
CY		 364#ifdef CONFIG_F2FS_FS_COMPRESSION
365 if (f2fs_is_compressed_page(page)) {
366 f2fs_compress_write_end_io(bio, page);
367 continue;
368 }
369#endif
370
4e4cbee9 371 if (unlikely(bio->bi_status)) {
5114a97a 372 mapping_set_error(page->mapping, -EIO);
b1ca321d
JK		 373 if (type == F2FS_WB_CP_DATA)
374 f2fs_stop_checkpoint(sbi, true);
93dfe2ac 375 }
7dff55d2
YH		 376
377 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
378 page->index != nid_of_node(page));
379
36951b38 380 dec_page_count(sbi, type);
50fa53ec
CY		 381 if (f2fs_in_warm_node_list(sbi, page))
382 f2fs_del_fsync_node_entry(sbi, page);
36951b38 383 clear_cold_data(page);
93dfe2ac 384 end_page_writeback(page);
f568849e 385 }
36951b38 386 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
f5730184 387 wq_has_sleeper(&sbi->cp_wait))
93dfe2ac
JK		 388 wake_up(&sbi->cp_wait);
389
390 bio_put(bio);
391}
392
3c62be17
JK		 393struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
394 block_t blk_addr, struct bio *bio)
395{
396 struct block_device *bdev = sbi->sb->s_bdev;
397 int i;
398
0916878d
DLM		 399 if (f2fs_is_multi_device(sbi)) {
400 for (i = 0; i < sbi->s_ndevs; i++) {
401 if (FDEV(i).start_blk <= blk_addr &&
402 FDEV(i).end_blk >= blk_addr) {
403 blk_addr -= FDEV(i).start_blk;
404 bdev = FDEV(i).bdev;
405 break;
406 }
3c62be17
JK		 407 }
408 }
409 if (bio) {
74d46992 410 bio_set_dev(bio, bdev);
3c62be17
JK		 411 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
412 }
413 return bdev;
414}
415
416int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
417{
418 int i;
419
0916878d
DLM		 420 if (!f2fs_is_multi_device(sbi))
421 return 0;
422
3c62be17
JK		 423 for (i = 0; i < sbi->s_ndevs; i++)
424 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
425 return i;
426 return 0;
427}
428
7a88ddb5
CY		 429/*
430 * Return true, if pre_bio's bdev is same as its target device.
431 */
3c62be17
JK		 432static bool __same_bdev(struct f2fs_sb_info *sbi,
433 block_t blk_addr, struct bio *bio)
434{
74d46992
CH		 435 struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
436 return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
3c62be17
JK		 437}
438
b757f6ed 439static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
940a6d34 440{
b757f6ed 441 struct f2fs_sb_info *sbi = fio->sbi;
940a6d34
GZ		 442 struct bio *bio;
443
d62fe971 444 bio = f2fs_bio_alloc(sbi, npages, true);
940a6d34 445
b757f6ed
CY		 446 f2fs_target_device(sbi, fio->new_blkaddr, bio);
447 if (is_read_io(fio->op)) {
0cdd3195
HL		 448 bio->bi_end_io = f2fs_read_end_io;
449 bio->bi_private = NULL;
450 } else {
451 bio->bi_end_io = f2fs_write_end_io;
452 bio->bi_private = sbi;
b757f6ed
CY		 453 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
454 fio->type, fio->temp);
0cdd3195 455 }
b757f6ed
CY		 456 if (fio->io_wbc)
457 wbc_init_bio(fio->io_wbc, bio);
940a6d34
GZ		 458
459 return bio;
460}
461
4fc29c1a
LT		 462static inline void __submit_bio(struct f2fs_sb_info *sbi,
463 struct bio *bio, enum page_type type)
f5730184 464{
4fc29c1a 465 if (!is_read_io(bio_op(bio))) {
0a595eba
JK		 466 unsigned int start;
467
0a595eba
JK		 468 if (type != DATA && type != NODE)
469 goto submit_io;
470
b0332a0f 471 if (f2fs_lfs_mode(sbi) && current->plug)
3bb09a0e
TY		 472 blk_finish_plug(current->plug);
473
8223ecc4
CY		 474 if (F2FS_IO_ALIGNED(sbi))
475 goto submit_io;
476
0a595eba
JK		 477 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
478 start %= F2FS_IO_SIZE(sbi);
479
480 if (start == 0)
481 goto submit_io;
482
483 /* fill dummy pages */
484 for (; start < F2FS_IO_SIZE(sbi); start++) {
485 struct page *page =
486 mempool_alloc(sbi->write_io_dummy,
bc73a4b2 487 GFP_NOIO | __GFP_NOFAIL);
0a595eba
JK		 488 f2fs_bug_on(sbi, !page);
489
bc73a4b2 490 zero_user_segment(page, 0, PAGE_SIZE);
0a595eba
JK		 491 SetPagePrivate(page);
492 set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
493 lock_page(page);
494 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
495 f2fs_bug_on(sbi, 1);
496 }
497 /*
498 * In the NODE case, we lose next block address chain. So, we
499 * need to do checkpoint in f2fs_sync_file.
500 */
501 if (type == NODE)
502 set_sbi_flag(sbi, SBI_NEED_CP);
19a5f5e2 503 }
0a595eba 504submit_io:
554b5125
JK		 505 if (is_read_io(bio_op(bio)))
506 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
507 else
508 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
4e49ea4a 509 submit_bio(bio);
f5730184
JK		 510}
511
4c8ff709
CY		 512void f2fs_submit_bio(struct f2fs_sb_info *sbi,
513 struct bio *bio, enum page_type type)
514{
515 __submit_bio(sbi, bio, type);
516}
517
32b6aba8 518static void __attach_io_flag(struct f2fs_io_info *fio)
da9953b7
JK		 519{
520 struct f2fs_sb_info *sbi = fio->sbi;
521 unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
32b6aba8
JK		 522 unsigned int io_flag, fua_flag, meta_flag;
523
524 if (fio->type == DATA)
525 io_flag = sbi->data_io_flag;
526 else if (fio->type == NODE)
527 io_flag = sbi->node_io_flag;
528 else
529 return;
530
531 fua_flag = io_flag & temp_mask;
532 meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
533
da9953b7 534 /*
32b6aba8 535 * data/node io flag bits per temp:
da9953b7
JK		 536 * REQ_META | REQ_FUA |
537 * 5 | 4 | 3 | 2 | 1 | 0 |
538 * Cold | Warm | Hot | Cold | Warm | Hot |
539 */
da9953b7
JK		 540 if ((1 << fio->temp) & meta_flag)
541 fio->op_flags |= REQ_META;
542 if ((1 << fio->temp) & fua_flag)
543 fio->op_flags |= REQ_FUA;
544}
545
458e6197 546static void __submit_merged_bio(struct f2fs_bio_info *io)
93dfe2ac 547{
458e6197 548 struct f2fs_io_info *fio = &io->fio;
93dfe2ac
JK		 549
550 if (!io->bio)
551 return;
552
32b6aba8 553 __attach_io_flag(fio);
554b5125
JK		 554 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
555
04d328de 556 if (is_read_io(fio->op))
554b5125 557 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
6a8f8ca5 558 else
554b5125 559 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
04d328de 560
4fc29c1a 561 __submit_bio(io->sbi, io->bio, fio->type);
93dfe2ac
JK		 562 io->bio = NULL;
563}
564
8648de2c 565static bool __has_merged_page(struct bio *bio, struct inode *inode,
bab475c5 566 struct page *page, nid_t ino)
0fd785eb 567{
0fd785eb 568 struct bio_vec *bvec;
6dc4f100 569 struct bvec_iter_all iter_all;
0fd785eb 570
8648de2c 571 if (!bio)
0fd785eb 572 return false;
0c3a5797 573
bab475c5 574 if (!inode && !page && !ino)
0c3a5797 575 return true;
0fd785eb 576
8648de2c 577 bio_for_each_segment_all(bvec, bio, iter_all) {
4c8ff709 578 struct page *target = bvec->bv_page;
0fd785eb 579
4c8ff709 580 if (fscrypt_is_bounce_page(target)) {
d2d0727b 581 target = fscrypt_pagecache_page(target);
4c8ff709
CY		 582 if (IS_ERR(target))
583 continue;
584 }
585 if (f2fs_is_compressed_page(target)) {
586 target = f2fs_compress_control_page(target);
587 if (IS_ERR(target))
588 continue;
589 }
0fd785eb 590
0c3a5797
CY		 591 if (inode && inode == target->mapping->host)
592 return true;
bab475c5
CY		 593 if (page && page == target)
594 return true;
0c3a5797 595 if (ino && ino == ino_of_node(target))
0fd785eb 596 return true;
0fd785eb
CY		 597 }
598
0fd785eb
CY		 599 return false;
600}
601
b9109b0e 602static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
a912b54d 603 enum page_type type, enum temp_type temp)
93dfe2ac
JK		 604{
605 enum page_type btype = PAGE_TYPE_OF_BIO(type);
a912b54d 606 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
93dfe2ac 607
df0f8dc0 608 down_write(&io->io_rwsem);
458e6197
JK		 609
610 /* change META to META_FLUSH in the checkpoint procedure */
611 if (type >= META_FLUSH) {
612 io->fio.type = META_FLUSH;
04d328de 613 io->fio.op = REQ_OP_WRITE;
3adc5fcb 614 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
70fd7614 615 if (!test_opt(sbi, NOBARRIER))
7f54f51f 616 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
458e6197
JK		 617 }
618 __submit_merged_bio(io);
df0f8dc0 619 up_write(&io->io_rwsem);
93dfe2ac
JK		 620}
621
a912b54d 622static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 623 struct inode *inode, struct page *page,
624 nid_t ino, enum page_type type, bool force)
0c3a5797 625{
a912b54d 626 enum temp_type temp;
1e771e83 627 bool ret = true;
a912b54d
JK		 628
629 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
1e771e83
YS		 630 if (!force) {
631 enum page_type btype = PAGE_TYPE_OF_BIO(type);
632 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
a912b54d 633
1e771e83 634 down_read(&io->io_rwsem);
8648de2c 635 ret = __has_merged_page(io->bio, inode, page, ino);
1e771e83
YS		 636 up_read(&io->io_rwsem);
637 }
638 if (ret)
639 __f2fs_submit_merged_write(sbi, type, temp);
a912b54d
JK		 640
641 /* TODO: use HOT temp only for meta pages now. */
642 if (type >= META)
643 break;
644 }
0c3a5797
CY		 645}
646
b9109b0e 647void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
0c3a5797 648{
adcc00f7 649 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
0c3a5797
CY		 650}
651
b9109b0e 652void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 653 struct inode *inode, struct page *page,
654 nid_t ino, enum page_type type)
0c3a5797 655{
bab475c5 656 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
0c3a5797
CY		 657}
658
b9109b0e 659void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
406657dd 660{
b9109b0e
JK		 661 f2fs_submit_merged_write(sbi, DATA);
662 f2fs_submit_merged_write(sbi, NODE);
663 f2fs_submit_merged_write(sbi, META);
406657dd
CY		 664}
665
93dfe2ac
JK		 666/*
667 * Fill the locked page with data located in the block address.
771a9a71 668 * A caller needs to unlock the page on failure.
93dfe2ac 669 */
05ca3632 670int f2fs_submit_page_bio(struct f2fs_io_info *fio)
93dfe2ac 671{
93dfe2ac 672 struct bio *bio;
0b81d077
JK		 673 struct page *page = fio->encrypted_page ?
674 fio->encrypted_page : fio->page;
93dfe2ac 675
c9b60788 676 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
93770ab7
CY		 677 fio->is_por ? META_POR : (__is_meta_io(fio) ?
678 META_GENERIC : DATA_GENERIC_ENHANCE)))
10f966bb 679 return -EFSCORRUPTED;
c9b60788 680
2ace38e0 681 trace_f2fs_submit_page_bio(page, fio);
05ca3632 682 f2fs_trace_ios(fio, 0);
93dfe2ac
JK		 683
684 /* Allocate a new bio */
b757f6ed 685 bio = __bio_alloc(fio, 1);
93dfe2ac 686
09cbfeaf 687 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
93dfe2ac 688 bio_put(bio);
93dfe2ac
JK		 689 return -EFAULT;
690 }
78efac53
CY		 691
692 if (fio->io_wbc && !is_read_io(fio->op))
34e51a5e 693 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
78efac53 694
b7b911d5 695 __attach_io_flag(fio);
04d328de 696 bio_set_op_attrs(bio, fio->op, fio->op_flags);
93dfe2ac 697
5f9abab4
JK		 698 inc_page_count(fio->sbi, is_read_io(fio->op) ?
699 __read_io_type(page): WB_DATA_TYPE(fio->page));
4c58ed07
CY		 700
701 __submit_bio(fio->sbi, bio, fio->type);
93dfe2ac
JK		 702 return 0;
703}
704
8896cbdf
CY		 705static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
706 block_t last_blkaddr, block_t cur_blkaddr)
707{
708 if (last_blkaddr + 1 != cur_blkaddr)
709 return false;
710 return __same_bdev(sbi, cur_blkaddr, bio);
711}
712
713static bool io_type_is_mergeable(struct f2fs_bio_info *io,
714 struct f2fs_io_info *fio)
715{
716 if (io->fio.op != fio->op)
717 return false;
718 return io->fio.op_flags == fio->op_flags;
719}
720
721static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
722 struct f2fs_bio_info *io,
723 struct f2fs_io_info *fio,
724 block_t last_blkaddr,
725 block_t cur_blkaddr)
726{
c72db71e
CY		 727 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
728 unsigned int filled_blocks =
729 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
730 unsigned int io_size = F2FS_IO_SIZE(sbi);
731 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
732
733 /* IOs in bio is aligned and left space of vectors is not enough */
734 if (!(filled_blocks % io_size) && left_vecs < io_size)
735 return false;
736 }
8896cbdf
CY		 737 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
738 return false;
739 return io_type_is_mergeable(io, fio);
740}
741
0b20fcec
CY		 742static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
743 struct page *page, enum temp_type temp)
744{
745 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
746 struct bio_entry *be;
747
748 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
749 be->bio = bio;
750 bio_get(bio);
751
752 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
753 f2fs_bug_on(sbi, 1);
754
755 down_write(&io->bio_list_lock);
756 list_add_tail(&be->list, &io->bio_list);
757 up_write(&io->bio_list_lock);
758}
759
760static void del_bio_entry(struct bio_entry *be)
761{
762 list_del(&be->list);
763 kmem_cache_free(bio_entry_slab, be);
764}
765
766static int add_ipu_page(struct f2fs_sb_info *sbi, struct bio **bio,
767 struct page *page)
768{
769 enum temp_type temp;
770 bool found = false;
771 int ret = -EAGAIN;
772
773 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
774 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
775 struct list_head *head = &io->bio_list;
776 struct bio_entry *be;
777
778 down_write(&io->bio_list_lock);
779 list_for_each_entry(be, head, list) {
780 if (be->bio != *bio)
781 continue;
782
783 found = true;
784
4c8ff709
CY		 785 if (bio_add_page(*bio, page, PAGE_SIZE, 0) ==
786 PAGE_SIZE) {
0b20fcec
CY		 787 ret = 0;
788 break;
789 }
790
791 /* bio is full */
792 del_bio_entry(be);
793 __submit_bio(sbi, *bio, DATA);
794 break;
795 }
796 up_write(&io->bio_list_lock);
797 }
798
799 if (ret) {
800 bio_put(*bio);
801 *bio = NULL;
802 }
803
804 return ret;
805}
806
807void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
808 struct bio **bio, struct page *page)
809{
810 enum temp_type temp;
811 bool found = false;
812 struct bio *target = bio ? *bio : NULL;
813
814 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
815 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
816 struct list_head *head = &io->bio_list;
817 struct bio_entry *be;
818
819 if (list_empty(head))
820 continue;
821
822 down_read(&io->bio_list_lock);
823 list_for_each_entry(be, head, list) {
824 if (target)
825 found = (target == be->bio);
826 else
827 found = __has_merged_page(be->bio, NULL,
828 page, 0);
829 if (found)
830 break;
831 }
832 up_read(&io->bio_list_lock);
833
834 if (!found)
835 continue;
836
837 found = false;
838
839 down_write(&io->bio_list_lock);
840 list_for_each_entry(be, head, list) {
841 if (target)
842 found = (target == be->bio);
843 else
844 found = __has_merged_page(be->bio, NULL,
845 page, 0);
846 if (found) {
847 target = be->bio;
848 del_bio_entry(be);
849 break;
850 }
851 }
852 up_write(&io->bio_list_lock);
853 }
854
855 if (found)
856 __submit_bio(sbi, target, DATA);
857 if (bio && *bio) {
858 bio_put(*bio);
859 *bio = NULL;
860 }
861}
862
8648de2c
CY		 863int f2fs_merge_page_bio(struct f2fs_io_info *fio)
864{
865 struct bio *bio = *fio->bio;
866 struct page *page = fio->encrypted_page ?
867 fio->encrypted_page : fio->page;
868
869 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
870 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
10f966bb 871 return -EFSCORRUPTED;
8648de2c
CY		 872
873 trace_f2fs_submit_page_bio(page, fio);
874 f2fs_trace_ios(fio, 0);
875
8896cbdf 876 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
0b20fcec
CY		 877 fio->new_blkaddr))
878 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
8648de2c
CY		 879alloc_new:
880 if (!bio) {
b757f6ed 881 bio = __bio_alloc(fio, BIO_MAX_PAGES);
b7b911d5 882 __attach_io_flag(fio);
8648de2c 883 bio_set_op_attrs(bio, fio->op, fio->op_flags);
8648de2c 884
0b20fcec
CY		 885 add_bio_entry(fio->sbi, bio, page, fio->temp);
886 } else {
887 if (add_ipu_page(fio->sbi, &bio, page))
888 goto alloc_new;
8648de2c
CY		 889 }
890
891 if (fio->io_wbc)
9637d517 892 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
8648de2c
CY		 893
894 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
895
896 *fio->last_block = fio->new_blkaddr;
897 *fio->bio = bio;
898
899 return 0;
900}
901
fe16efe6 902void f2fs_submit_page_write(struct f2fs_io_info *fio)
93dfe2ac 903{
05ca3632 904 struct f2fs_sb_info *sbi = fio->sbi;
458e6197 905 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
a912b54d 906 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
4375a336 907 struct page *bio_page;
93dfe2ac 908
b9109b0e 909 f2fs_bug_on(sbi, is_read_io(fio->op));
93dfe2ac 910
fb830fc5
CY		 911 down_write(&io->io_rwsem);
912next:
913 if (fio->in_list) {
914 spin_lock(&io->io_lock);
915 if (list_empty(&io->io_list)) {
916 spin_unlock(&io->io_lock);
fe16efe6 917 goto out;
fb830fc5
CY		 918 }
919 fio = list_first_entry(&io->io_list,
920 struct f2fs_io_info, list);
921 list_del(&fio->list);
922 spin_unlock(&io->io_lock);
923 }
93dfe2ac 924
93770ab7 925 verify_fio_blkaddr(fio);
93dfe2ac 926
4c8ff709
CY		 927 if (fio->encrypted_page)
928 bio_page = fio->encrypted_page;
929 else if (fio->compressed_page)
930 bio_page = fio->compressed_page;
931 else
932 bio_page = fio->page;
36951b38 933
ebf7c522
TM		 934 /* set submitted = true as a return value */
935 fio->submitted = true;
d68f735b 936
b9109b0e 937 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
93dfe2ac 938
8896cbdf
CY		 939 if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio,
940 io->last_block_in_bio, fio->new_blkaddr))
458e6197 941 __submit_merged_bio(io);
93dfe2ac
JK		 942alloc_new:
943 if (io->bio == NULL) {
8223ecc4
CY		 944 if (F2FS_IO_ALIGNED(sbi) &&
945 (fio->type == DATA || fio->type == NODE) &&
0a595eba 946 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
b9109b0e 947 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
fe16efe6
CY		 948 fio->retry = true;
949 goto skip;
0a595eba 950 }
b757f6ed 951 io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
458e6197 952 io->fio = *fio;
93dfe2ac
JK		 953 }
954
a912b54d 955 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
458e6197 956 __submit_merged_bio(io);
93dfe2ac
JK		 957 goto alloc_new;
958 }
959
578c6478 960 if (fio->io_wbc)
34e51a5e 961 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
578c6478 962
7a9d7548 963 io->last_block_in_bio = fio->new_blkaddr;
05ca3632 964 f2fs_trace_ios(fio, 0);
fb830fc5
CY		 965
966 trace_f2fs_submit_page_write(fio->page, fio);
fe16efe6 967skip:
fb830fc5
CY		 968 if (fio->in_list)
969 goto next;
fe16efe6 970out:
4354994f 971 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
00e09c0b 972 !f2fs_is_checkpoint_ready(sbi))
5ce80586 973 __submit_merged_bio(io);
df0f8dc0 974 up_write(&io->io_rwsem);
93dfe2ac
JK		 975}
976
95ae251f
EB		 977static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
978{
979 return fsverity_active(inode) &&
980 idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
981}
982
13ba41e3 983static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
95ae251f 984 unsigned nr_pages, unsigned op_flag,
0683728a 985 pgoff_t first_idx, bool for_write)
13ba41e3
JK		 986{
987 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ba41e3 988 struct bio *bio;
6dbb1796
EB		 989 struct bio_post_read_ctx *ctx;
990 unsigned int post_read_steps = 0;
13ba41e3 991
0683728a
CY		 992 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES),
993 for_write);
6dbb1796 994 if (!bio)
13ba41e3 995 return ERR_PTR(-ENOMEM);
13ba41e3
JK		 996 f2fs_target_device(sbi, blkaddr, bio);
997 bio->bi_end_io = f2fs_read_end_io;
e2e59414 998 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
13ba41e3 999
6dbb1796
EB		 1000 if (f2fs_encrypted_file(inode))
1001 post_read_steps |= 1 << STEP_DECRYPT;
4c8ff709 1002 if (f2fs_compressed_file(inode))
03382f1a 1003 post_read_steps |= 1 << STEP_DECOMPRESS_NOWQ;
95ae251f
EB		 1004 if (f2fs_need_verity(inode, first_idx))
1005 post_read_steps |= 1 << STEP_VERITY;
1006
6dbb1796 1007 if (post_read_steps) {
e8ce5749 1008 /* Due to the mempool, this never fails. */
6dbb1796 1009 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
6dbb1796 1010 ctx->bio = bio;
4c8ff709 1011 ctx->sbi = sbi;
6dbb1796
EB		 1012 ctx->enabled_steps = post_read_steps;
1013 bio->bi_private = ctx;
6dbb1796
EB		 1014 }
1015
13ba41e3
JK		 1016 return bio;
1017}
1018
4c8ff709
CY		 1019static void f2fs_release_read_bio(struct bio *bio)
1020{
1021 if (bio->bi_private)
1022 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
1023 bio_put(bio);
1024}
1025
13ba41e3
JK		 1026/* This can handle encryption stuffs */
1027static int f2fs_submit_page_read(struct inode *inode, struct page *page,
0683728a 1028 block_t blkaddr, bool for_write)
13ba41e3 1029{
93770ab7
CY		 1030 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1031 struct bio *bio;
13ba41e3 1032
0683728a 1033 bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index, for_write);
13ba41e3
JK		 1034 if (IS_ERR(bio))
1035 return PTR_ERR(bio);
1036
0ded69f6
JK		 1037 /* wait for GCed page writeback via META_MAPPING */
1038 f2fs_wait_on_block_writeback(inode, blkaddr);
1039
13ba41e3
JK		 1040 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1041 bio_put(bio);
1042 return -EFAULT;
1043 }
fb7d70db 1044 ClearPageError(page);
93770ab7 1045 inc_page_count(sbi, F2FS_RD_DATA);
8b83ac81 1046 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
93770ab7 1047 __submit_bio(sbi, bio, DATA);
13ba41e3
JK		 1048 return 0;
1049}
1050
46008c6d
CY		 1051static void __set_data_blkaddr(struct dnode_of_data *dn)
1052{
1053 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
1054 __le32 *addr_array;
7a2af766
CY		 1055 int base = 0;
1056
1057 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
1058 base = get_extra_isize(dn->inode);
46008c6d
CY		 1059
1060 /* Get physical address of data block */
1061 addr_array = blkaddr_in_node(rn);
7a2af766 1062 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
46008c6d
CY		 1063}
1064
0a8165d7 1065/*
eb47b800
JK		 1066 * Lock ordering for the change of data block address:
1067 * ->data_page
1068 * ->node_page
1069 * update block addresses in the node page
1070 */
4d57b86d 1071void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
eb47b800 1072{
bae0ee7a 1073 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1074 __set_data_blkaddr(dn);
1075 if (set_page_dirty(dn->node_page))
12719ae1 1076 dn->node_changed = true;
eb47b800
JK		 1077}
1078
f28b3434
CY		 1079void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
1080{
1081 dn->data_blkaddr = blkaddr;
4d57b86d 1082 f2fs_set_data_blkaddr(dn);
f28b3434
CY		 1083 f2fs_update_extent_cache(dn);
1084}
1085
46008c6d 1086/* dn->ofs_in_node will be returned with up-to-date last block pointer */
4d57b86d 1087int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
eb47b800 1088{
4081363f 1089 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
0abd675e 1090 int err;
eb47b800 1091
46008c6d
CY		 1092 if (!count)
1093 return 0;
1094
91942321 1095 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
eb47b800 1096 return -EPERM;
0abd675e
CY		 1097 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1098 return err;
eb47b800 1099
46008c6d
CY		 1100 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
1101 dn->ofs_in_node, count);
1102
bae0ee7a 1103 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1104
1105 for (; count > 0; dn->ofs_in_node++) {
a2ced1ce 1106 block_t blkaddr = f2fs_data_blkaddr(dn);
46008c6d
CY		 1107 if (blkaddr == NULL_ADDR) {
1108 dn->data_blkaddr = NEW_ADDR;
1109 __set_data_blkaddr(dn);
1110 count--;
1111 }
1112 }
1113
1114 if (set_page_dirty(dn->node_page))
1115 dn->node_changed = true;
eb47b800
JK		 1116 return 0;
1117}
1118
46008c6d 1119/* Should keep dn->ofs_in_node unchanged */
4d57b86d 1120int f2fs_reserve_new_block(struct dnode_of_data *dn)
46008c6d
CY		 1121{
1122 unsigned int ofs_in_node = dn->ofs_in_node;
1123 int ret;
1124
4d57b86d 1125 ret = f2fs_reserve_new_blocks(dn, 1);
46008c6d
CY		 1126 dn->ofs_in_node = ofs_in_node;
1127 return ret;
1128}
1129
b600965c
HL		 1130int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
1131{
1132 bool need_put = dn->inode_page ? false : true;
1133 int err;
1134
4d57b86d 1135 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
b600965c
HL		 1136 if (err)
1137 return err;
a8865372 1138
b600965c 1139 if (dn->data_blkaddr == NULL_ADDR)
4d57b86d 1140 err = f2fs_reserve_new_block(dn);
a8865372 1141 if (err || need_put)
b600965c
HL		 1142 f2fs_put_dnode(dn);
1143 return err;
1144}
1145
759af1c9 1146int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
eb47b800 1147{
e15882b6 1148 struct extent_info ei = {0,0,0};
759af1c9 1149 struct inode *inode = dn->inode;
028a41e8 1150
759af1c9
FL		 1151 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1152 dn->data_blkaddr = ei.blk + index - ei.fofs;
1153 return 0;
429511cd 1154 }
028a41e8 1155
759af1c9 1156 return f2fs_reserve_block(dn, index);
eb47b800
JK		 1157}
1158
4d57b86d 1159struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
04d328de 1160 int op_flags, bool for_write)
eb47b800 1161{
eb47b800
JK		 1162 struct address_space *mapping = inode->i_mapping;
1163 struct dnode_of_data dn;
1164 struct page *page;
e15882b6 1165 struct extent_info ei = {0,0,0};
eb47b800 1166 int err;
4375a336 1167
a56c7c6f 1168 page = f2fs_grab_cache_page(mapping, index, for_write);
650495de
JK		 1169 if (!page)
1170 return ERR_PTR(-ENOMEM);
1171
cb3bc9ee
CY		 1172 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1173 dn.data_blkaddr = ei.blk + index - ei.fofs;
93770ab7
CY		 1174 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1175 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1176 err = -EFSCORRUPTED;
93770ab7
CY		 1177 goto put_err;
1178 }
cb3bc9ee
CY		 1179 goto got_it;
1180 }
1181
eb47b800 1182 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1183 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
86531d6b
JK		 1184 if (err)
1185 goto put_err;
eb47b800
JK		 1186 f2fs_put_dnode(&dn);
1187
6bacf52f 1188 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
86531d6b
JK		 1189 err = -ENOENT;
1190 goto put_err;
650495de 1191 }
93770ab7
CY		 1192 if (dn.data_blkaddr != NEW_ADDR &&
1193 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1194 dn.data_blkaddr,
1195 DATA_GENERIC_ENHANCE)) {
10f966bb 1196 err = -EFSCORRUPTED;
93770ab7
CY		 1197 goto put_err;
1198 }
cb3bc9ee 1199got_it:
43f3eae1
JK		 1200 if (PageUptodate(page)) {
1201 unlock_page(page);
eb47b800 1202 return page;
43f3eae1 1203 }
eb47b800 1204
d59ff4df
JK		 1205 /*
1206 * A new dentry page is allocated but not able to be written, since its
1207 * new inode page couldn't be allocated due to -ENOSPC.
1208 * In such the case, its blkaddr can be remained as NEW_ADDR.
4d57b86d
CY		 1209 * see, f2fs_add_link -> f2fs_get_new_data_page ->
1210 * f2fs_init_inode_metadata.
d59ff4df
JK		 1211 */
1212 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1213 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1214 if (!PageUptodate(page))
1215 SetPageUptodate(page);
43f3eae1 1216 unlock_page(page);
d59ff4df
JK		 1217 return page;
1218 }
eb47b800 1219
0683728a 1220 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr, for_write);
393ff91f 1221 if (err)
86531d6b 1222 goto put_err;
43f3eae1 1223 return page;
86531d6b
JK		 1224
1225put_err:
1226 f2fs_put_page(page, 1);
1227 return ERR_PTR(err);
43f3eae1
JK		 1228}
1229
4d57b86d 1230struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
43f3eae1
JK		 1231{
1232 struct address_space *mapping = inode->i_mapping;
1233 struct page *page;
1234
1235 page = find_get_page(mapping, index);
1236 if (page && PageUptodate(page))
1237 return page;
1238 f2fs_put_page(page, 0);
1239
4d57b86d 1240 page = f2fs_get_read_data_page(inode, index, 0, false);
43f3eae1
JK		 1241 if (IS_ERR(page))
1242 return page;
1243
1244 if (PageUptodate(page))
1245 return page;
1246
1247 wait_on_page_locked(page);
1248 if (unlikely(!PageUptodate(page))) {
1249 f2fs_put_page(page, 0);
1250 return ERR_PTR(-EIO);
1251 }
1252 return page;
1253}
1254
1255/*
1256 * If it tries to access a hole, return an error.
1257 * Because, the callers, functions in dir.c and GC, should be able to know
1258 * whether this page exists or not.
1259 */
4d57b86d 1260struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
a56c7c6f 1261 bool for_write)
43f3eae1
JK		 1262{
1263 struct address_space *mapping = inode->i_mapping;
1264 struct page *page;
1265repeat:
4d57b86d 1266 page = f2fs_get_read_data_page(inode, index, 0, for_write);
43f3eae1
JK		 1267 if (IS_ERR(page))
1268 return page;
393ff91f 1269
43f3eae1 1270 /* wait for read completion */
393ff91f 1271 lock_page(page);
6bacf52f 1272 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 1273 f2fs_put_page(page, 1);
1274 goto repeat;
eb47b800 1275 }
1563ac75
CY		 1276 if (unlikely(!PageUptodate(page))) {
1277 f2fs_put_page(page, 1);
1278 return ERR_PTR(-EIO);
1279 }
eb47b800
JK		 1280 return page;
1281}
1282
0a8165d7 1283/*
eb47b800
JK		 1284 * Caller ensures that this data page is never allocated.
1285 * A new zero-filled data page is allocated in the page cache.
39936837 1286 *
4f4124d0
CY		 1287 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
1288 * f2fs_unlock_op().
470f00e9
CY		 1289 * Note that, ipage is set only by make_empty_dir, and if any error occur,
1290 * ipage should be released by this function.
eb47b800 1291 */
4d57b86d 1292struct page *f2fs_get_new_data_page(struct inode *inode,
a8865372 1293 struct page *ipage, pgoff_t index, bool new_i_size)
eb47b800 1294{
eb47b800
JK		 1295 struct address_space *mapping = inode->i_mapping;
1296 struct page *page;
1297 struct dnode_of_data dn;
1298 int err;
7612118a 1299
a56c7c6f 1300 page = f2fs_grab_cache_page(mapping, index, true);
470f00e9
CY		 1301 if (!page) {
1302 /*
1303 * before exiting, we should make sure ipage will be released
1304 * if any error occur.
1305 */
1306 f2fs_put_page(ipage, 1);
01f28610 1307 return ERR_PTR(-ENOMEM);
470f00e9 1308 }
eb47b800 1309
a8865372 1310 set_new_dnode(&dn, inode, ipage, NULL, 0);
b600965c 1311 err = f2fs_reserve_block(&dn, index);
01f28610
JK		 1312 if (err) {
1313 f2fs_put_page(page, 1);
eb47b800 1314 return ERR_PTR(err);
a8865372 1315 }
01f28610
JK		 1316 if (!ipage)
1317 f2fs_put_dnode(&dn);
eb47b800
JK		 1318
1319 if (PageUptodate(page))
01f28610 1320 goto got_it;
eb47b800
JK		 1321
1322 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1323 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1324 if (!PageUptodate(page))
1325 SetPageUptodate(page);
eb47b800 1326 } else {
4375a336 1327 f2fs_put_page(page, 1);
a8865372 1328
7612118a
JK		 1329 /* if ipage exists, blkaddr should be NEW_ADDR */
1330 f2fs_bug_on(F2FS_I_SB(inode), ipage);
4d57b86d 1331 page = f2fs_get_lock_data_page(inode, index, true);
4375a336 1332 if (IS_ERR(page))
7612118a 1333 return page;
eb47b800 1334 }
01f28610 1335got_it:
9edcdabf 1336 if (new_i_size && i_size_read(inode) <
ee6d182f 1337 ((loff_t)(index + 1) << PAGE_SHIFT))
fc9581c8 1338 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
eb47b800
JK		 1339 return page;
1340}
1341
d5097be5 1342static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
bfad7c2d 1343{
4081363f 1344 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
bfad7c2d 1345 struct f2fs_summary sum;
bfad7c2d 1346 struct node_info ni;
6aa58d8a 1347 block_t old_blkaddr;
46008c6d 1348 blkcnt_t count = 1;
0abd675e 1349 int err;
bfad7c2d 1350
91942321 1351 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
bfad7c2d 1352 return -EPERM;
df6136ef 1353
7735730d
CY		 1354 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1355 if (err)
1356 return err;
1357
a2ced1ce 1358 dn->data_blkaddr = f2fs_data_blkaddr(dn);
f847c699 1359 if (dn->data_blkaddr != NULL_ADDR)
df6136ef
CY		 1360 goto alloc;
1361
0abd675e
CY		 1362 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1363 return err;
bfad7c2d 1364
df6136ef 1365alloc:
bfad7c2d 1366 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
6aa58d8a
CY		 1367 old_blkaddr = dn->data_blkaddr;
1368 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
d5097be5 1369 &sum, seg_type, NULL, false);
6aa58d8a
CY		 1370 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1371 invalidate_mapping_pages(META_MAPPING(sbi),
1372 old_blkaddr, old_blkaddr);
86f35dc3 1373 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
bfad7c2d 1374
0a4daae5
JK		 1375 /*
1376 * i_size will be updated by direct_IO. Otherwise, we'll get stale
1377 * data from unwritten block via dio_read.
1378 */
bfad7c2d
JK		 1379 return 0;
1380}
1381
a7de6086 1382int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
59b802e5 1383{
b439b103 1384 struct inode *inode = file_inode(iocb->ki_filp);
5b8db7fa 1385 struct f2fs_map_blocks map;
d6d478a1 1386 int flag;
a7de6086 1387 int err = 0;
d6d478a1 1388 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
59b802e5 1389
0080c507 1390 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
dfd02e4d
CY		 1391 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1392 if (map.m_len > map.m_lblk)
1393 map.m_len -= map.m_lblk;
1394 else
1395 map.m_len = 0;
1396
da85985c 1397 map.m_next_pgofs = NULL;
c4020b2d 1398 map.m_next_extent = NULL;
d5097be5 1399 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1400 map.m_may_create = true;
2a340760 1401
d6d478a1 1402 if (direct_io) {
4d57b86d 1403 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
f847c699 1404 flag = f2fs_force_buffered_io(inode, iocb, from) ?
d6d478a1
CY		 1405 F2FS_GET_BLOCK_PRE_AIO :
1406 F2FS_GET_BLOCK_PRE_DIO;
1407 goto map_blocks;
d5097be5 1408 }
f2470371 1409 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
a7de6086
JK		 1410 err = f2fs_convert_inline_inode(inode);
1411 if (err)
1412 return err;
b439b103 1413 }
d6d478a1 1414 if (f2fs_has_inline_data(inode))
25006645 1415 return err;
d6d478a1
CY		 1416
1417 flag = F2FS_GET_BLOCK_PRE_AIO;
1418
1419map_blocks:
1420 err = f2fs_map_blocks(inode, &map, 1, flag);
1421 if (map.m_len > 0 && err == -ENOSPC) {
1422 if (!direct_io)
1423 set_inode_flag(inode, FI_NO_PREALLOC);
1424 err = 0;
25006645 1425 }
a7de6086 1426 return err;
59b802e5
JK		 1427}
1428
39a86958 1429void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
59c9081b
YH		 1430{
1431 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1432 if (lock)
1433 down_read(&sbi->node_change);
1434 else
1435 up_read(&sbi->node_change);
1436 } else {
1437 if (lock)
1438 f2fs_lock_op(sbi);
1439 else
1440 f2fs_unlock_op(sbi);
1441 }
1442}
1443
0a8165d7 1444/*
7a88ddb5
CY		 1445 * f2fs_map_blocks() tries to find or build mapping relationship which
1446 * maps continuous logical blocks to physical blocks, and return such
1447 * info via f2fs_map_blocks structure.
eb47b800 1448 */
d323d005 1449int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
e2b4e2bc 1450 int create, int flag)
eb47b800 1451{
003a3e1d 1452 unsigned int maxblocks = map->m_len;
eb47b800 1453 struct dnode_of_data dn;
f9811703 1454 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f9d6d059 1455 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
46008c6d 1456 pgoff_t pgofs, end_offset, end;
bfad7c2d 1457 int err = 0, ofs = 1;
46008c6d
CY		 1458 unsigned int ofs_in_node, last_ofs_in_node;
1459 blkcnt_t prealloc;
e15882b6 1460 struct extent_info ei = {0,0,0};
7df3a431 1461 block_t blkaddr;
c4020b2d 1462 unsigned int start_pgofs;
eb47b800 1463
dfd02e4d
CY		 1464 if (!maxblocks)
1465 return 0;
1466
003a3e1d
JK		 1467 map->m_len = 0;
1468 map->m_flags = 0;
1469
1470 /* it only supports block size == page size */
1471 pgofs = (pgoff_t)map->m_lblk;
46008c6d 1472 end = pgofs + maxblocks;
eb47b800 1473
24b84912 1474 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
b0332a0f 1475 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f4f0b677
JZ		 1476 map->m_may_create)
1477 goto next_dnode;
1478
003a3e1d
JK		 1479 map->m_pblk = ei.blk + pgofs - ei.fofs;
1480 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1481 map->m_flags = F2FS_MAP_MAPPED;
c4020b2d
CY		 1482 if (map->m_next_extent)
1483 *map->m_next_extent = pgofs + map->m_len;
1e78e8bd
ST		 1484
1485 /* for hardware encryption, but to avoid potential issue in future */
1486 if (flag == F2FS_GET_BLOCK_DIO)
1487 f2fs_wait_on_block_writeback_range(inode,
1488 map->m_pblk, map->m_len);
bfad7c2d 1489 goto out;
a2e7d1bf 1490 }
bfad7c2d 1491
4fe71e88 1492next_dnode:
f9d6d059 1493 if (map->m_may_create)
59c9081b 1494 __do_map_lock(sbi, flag, true);
eb47b800
JK		 1495
1496 /* When reading holes, we need its node page */
1497 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1498 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1ec79083 1499 if (err) {
43473f96
CY		 1500 if (flag == F2FS_GET_BLOCK_BMAP)
1501 map->m_pblk = 0;
da85985c 1502 if (err == -ENOENT) {
bfad7c2d 1503 err = 0;
da85985c
CY		 1504 if (map->m_next_pgofs)
1505 *map->m_next_pgofs =
4d57b86d 1506 f2fs_get_next_page_offset(&dn, pgofs);
c4020b2d
CY		 1507 if (map->m_next_extent)
1508 *map->m_next_extent =
4d57b86d 1509 f2fs_get_next_page_offset(&dn, pgofs);
da85985c 1510 }
bfad7c2d 1511 goto unlock_out;
848753aa 1512 }
973163fc 1513
c4020b2d 1514 start_pgofs = pgofs;
46008c6d 1515 prealloc = 0;
230436b3 1516 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
81ca7350 1517 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
4fe71e88
CY		 1518
1519next_block:
a2ced1ce 1520 blkaddr = f2fs_data_blkaddr(&dn);
4fe71e88 1521
c9b60788 1522 if (__is_valid_data_blkaddr(blkaddr) &&
93770ab7 1523 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
10f966bb 1524 err = -EFSCORRUPTED;
c9b60788
CY		 1525 goto sync_out;
1526 }
1527
93770ab7 1528 if (__is_valid_data_blkaddr(blkaddr)) {
f847c699 1529 /* use out-place-update for driect IO under LFS mode */
b0332a0f 1530 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f9d6d059 1531 map->m_may_create) {
f847c699 1532 err = __allocate_data_block(&dn, map->m_seg_type);
05e36006
CY		 1533 if (err)
1534 goto sync_out;
1535 blkaddr = dn.data_blkaddr;
1536 set_inode_flag(inode, FI_APPEND_WRITE);
f847c699
CY		 1537 }
1538 } else {
973163fc 1539 if (create) {
f9811703
CY		 1540 if (unlikely(f2fs_cp_error(sbi))) {
1541 err = -EIO;
4fe71e88 1542 goto sync_out;
f9811703 1543 }
24b84912 1544 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
46008c6d
CY		 1545 if (blkaddr == NULL_ADDR) {
1546 prealloc++;
1547 last_ofs_in_node = dn.ofs_in_node;
1548 }
24b84912 1549 } else {
0a4daae5
JK		 1550 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1551 flag != F2FS_GET_BLOCK_DIO);
d5097be5
HL		 1552 err = __allocate_data_block(&dn,
1553 map->m_seg_type);
6f2d8ed6 1554 if (!err)
91942321 1555 set_inode_flag(inode, FI_APPEND_WRITE);
24b84912 1556 }
973163fc 1557 if (err)
4fe71e88 1558 goto sync_out;
3f2be043 1559 map->m_flags |= F2FS_MAP_NEW;
4fe71e88 1560 blkaddr = dn.data_blkaddr;
973163fc 1561 } else {
43473f96
CY		 1562 if (flag == F2FS_GET_BLOCK_BMAP) {
1563 map->m_pblk = 0;
1564 goto sync_out;
1565 }
c4020b2d
CY		 1566 if (flag == F2FS_GET_BLOCK_PRECACHE)
1567 goto sync_out;
da85985c
CY		 1568 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1569 blkaddr == NULL_ADDR) {
1570 if (map->m_next_pgofs)
1571 *map->m_next_pgofs = pgofs + 1;
4c2ac6a8 1572 goto sync_out;
da85985c 1573 }
f3d98e74
CY		 1574 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1575 /* for defragment case */
1576 if (map->m_next_pgofs)
1577 *map->m_next_pgofs = pgofs + 1;
4fe71e88 1578 goto sync_out;
f3d98e74 1579 }
e2b4e2bc 1580 }
e2b4e2bc 1581 }
eb47b800 1582
46008c6d
CY		 1583 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1584 goto skip;
1585
4fe71e88
CY		 1586 if (map->m_len == 0) {
1587 /* preallocated unwritten block should be mapped for fiemap. */
1588 if (blkaddr == NEW_ADDR)
1589 map->m_flags |= F2FS_MAP_UNWRITTEN;
1590 map->m_flags |= F2FS_MAP_MAPPED;
1591
1592 map->m_pblk = blkaddr;
1593 map->m_len = 1;
1594 } else if ((map->m_pblk != NEW_ADDR &&
1595 blkaddr == (map->m_pblk + ofs)) ||
b439b103 1596 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
46008c6d 1597 flag == F2FS_GET_BLOCK_PRE_DIO) {
4fe71e88
CY		 1598 ofs++;
1599 map->m_len++;
1600 } else {
1601 goto sync_out;
1602 }
bfad7c2d 1603
46008c6d 1604skip:
bfad7c2d
JK		 1605 dn.ofs_in_node++;
1606 pgofs++;
1607
46008c6d
CY		 1608 /* preallocate blocks in batch for one dnode page */
1609 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1610 (pgofs == end || dn.ofs_in_node == end_offset)) {
7df3a431 1611
46008c6d 1612 dn.ofs_in_node = ofs_in_node;
4d57b86d 1613 err = f2fs_reserve_new_blocks(&dn, prealloc);
46008c6d
CY		 1614 if (err)
1615 goto sync_out;
bfad7c2d 1616
46008c6d
CY		 1617 map->m_len += dn.ofs_in_node - ofs_in_node;
1618 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1619 err = -ENOSPC;
1620 goto sync_out;
3104af35 1621 }
46008c6d
CY		 1622 dn.ofs_in_node = end_offset;
1623 }
1624
1625 if (pgofs >= end)
1626 goto sync_out;
1627 else if (dn.ofs_in_node < end_offset)
1628 goto next_block;
1629
c4020b2d
CY		 1630 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1631 if (map->m_flags & F2FS_MAP_MAPPED) {
1632 unsigned int ofs = start_pgofs - map->m_lblk;
1633
1634 f2fs_update_extent_cache_range(&dn,
1635 start_pgofs, map->m_pblk + ofs,
1636 map->m_len - ofs);
1637 }
1638 }
1639
46008c6d
CY		 1640 f2fs_put_dnode(&dn);
1641
f9d6d059 1642 if (map->m_may_create) {
59c9081b 1643 __do_map_lock(sbi, flag, false);
6f2d8ed6 1644 f2fs_balance_fs(sbi, dn.node_changed);
eb47b800 1645 }
46008c6d 1646 goto next_dnode;
7df3a431 1647
bfad7c2d 1648sync_out:
1e78e8bd
ST		 1649
1650 /* for hardware encryption, but to avoid potential issue in future */
1651 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1652 f2fs_wait_on_block_writeback_range(inode,
1653 map->m_pblk, map->m_len);
1654
c4020b2d
CY		 1655 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1656 if (map->m_flags & F2FS_MAP_MAPPED) {
1657 unsigned int ofs = start_pgofs - map->m_lblk;
1658
1659 f2fs_update_extent_cache_range(&dn,
1660 start_pgofs, map->m_pblk + ofs,
1661 map->m_len - ofs);
1662 }
1663 if (map->m_next_extent)
1664 *map->m_next_extent = pgofs + 1;
1665 }
eb47b800 1666 f2fs_put_dnode(&dn);
bfad7c2d 1667unlock_out:
f9d6d059 1668 if (map->m_may_create) {
59c9081b 1669 __do_map_lock(sbi, flag, false);
6f2d8ed6 1670 f2fs_balance_fs(sbi, dn.node_changed);
2a340760 1671 }
bfad7c2d 1672out:
003a3e1d 1673 trace_f2fs_map_blocks(inode, map, err);
bfad7c2d 1674 return err;
eb47b800
JK		 1675}
1676
b91050a8
HL		 1677bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1678{
1679 struct f2fs_map_blocks map;
1680 block_t last_lblk;
1681 int err;
1682
1683 if (pos + len > i_size_read(inode))
1684 return false;
1685
1686 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1687 map.m_next_pgofs = NULL;
1688 map.m_next_extent = NULL;
1689 map.m_seg_type = NO_CHECK_TYPE;
f4f0b677 1690 map.m_may_create = false;
b91050a8
HL		 1691 last_lblk = F2FS_BLK_ALIGN(pos + len);
1692
1693 while (map.m_lblk < last_lblk) {
1694 map.m_len = last_lblk - map.m_lblk;
1695 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1696 if (err || map.m_len == 0)
1697 return false;
1698 map.m_lblk += map.m_len;
1699 }
1700 return true;
1701}
1702
003a3e1d 1703static int __get_data_block(struct inode *inode, sector_t iblock,
da85985c 1704 struct buffer_head *bh, int create, int flag,
f9d6d059 1705 pgoff_t *next_pgofs, int seg_type, bool may_write)
003a3e1d
JK		 1706{
1707 struct f2fs_map_blocks map;
a7de6086 1708 int err;
003a3e1d
JK		 1709
1710 map.m_lblk = iblock;
1711 map.m_len = bh->b_size >> inode->i_blkbits;
da85985c 1712 map.m_next_pgofs = next_pgofs;
c4020b2d 1713 map.m_next_extent = NULL;
d5097be5 1714 map.m_seg_type = seg_type;
f9d6d059 1715 map.m_may_create = may_write;
003a3e1d 1716
a7de6086
JK		 1717 err = f2fs_map_blocks(inode, &map, create, flag);
1718 if (!err) {
003a3e1d
JK		 1719 map_bh(bh, inode->i_sb, map.m_pblk);
1720 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
b86e3307 1721 bh->b_size = (u64)map.m_len << inode->i_blkbits;
003a3e1d 1722 }
a7de6086 1723 return err;
003a3e1d
JK		 1724}
1725
ccfb3000 1726static int get_data_block(struct inode *inode, sector_t iblock,
da85985c
CY		 1727 struct buffer_head *bh_result, int create, int flag,
1728 pgoff_t *next_pgofs)
e2b4e2bc 1729{
da85985c 1730 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1731 flag, next_pgofs,
f9d6d059
CY		 1732 NO_CHECK_TYPE, create);
1733}
1734
1735static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1736 struct buffer_head *bh_result, int create)
1737{
1738 return __get_data_block(inode, iblock, bh_result, create,
1739 F2FS_GET_BLOCK_DIO, NULL,
1740 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
75a037f3 1741 IS_SWAPFILE(inode) ? false : true);
e2b4e2bc
CY		 1742}
1743
1744static int get_data_block_dio(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1745 struct buffer_head *bh_result, int create)
1746{
e2b4e2bc 1747 return __get_data_block(inode, iblock, bh_result, create,
f9d6d059
CY		 1748 F2FS_GET_BLOCK_DIO, NULL,
1749 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1750 false);
ccfb3000
JK		 1751}
1752
e2b4e2bc 1753static int get_data_block_bmap(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1754 struct buffer_head *bh_result, int create)
1755{
179448bf 1756 /* Block number less than F2FS MAX BLOCKS */
e0afc4d6 1757 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
179448bf
YH		 1758 return -EFBIG;
1759
e2b4e2bc 1760 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1761 F2FS_GET_BLOCK_BMAP, NULL,
f9d6d059 1762 NO_CHECK_TYPE, create);
ccfb3000
JK		 1763}
1764
7f63eb77
JK		 1765static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1766{
1767 return (offset >> inode->i_blkbits);
1768}
1769
1770static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1771{
1772 return (blk << inode->i_blkbits);
1773}
1774
442a9dbd
CY		 1775static int f2fs_xattr_fiemap(struct inode *inode,
1776 struct fiemap_extent_info *fieinfo)
1777{
1778 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1779 struct page *page;
1780 struct node_info ni;
1781 __u64 phys = 0, len;
1782 __u32 flags;
1783 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1784 int err = 0;
1785
1786 if (f2fs_has_inline_xattr(inode)) {
1787 int offset;
1788
1789 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1790 inode->i_ino, false);
1791 if (!page)
1792 return -ENOMEM;
1793
7735730d
CY		 1794 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1795 if (err) {
1796 f2fs_put_page(page, 1);
1797 return err;
1798 }
442a9dbd
CY		 1799
1800 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1801 offset = offsetof(struct f2fs_inode, i_addr) +
1802 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
b323fd28 1803 get_inline_xattr_addrs(inode));
442a9dbd
CY		 1804
1805 phys += offset;
1806 len = inline_xattr_size(inode);
1807
1808 f2fs_put_page(page, 1);
1809
1810 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1811
1812 if (!xnid)
1813 flags |= FIEMAP_EXTENT_LAST;
1814
1815 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1816 if (err || err == 1)
1817 return err;
1818 }
1819
1820 if (xnid) {
1821 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1822 if (!page)
1823 return -ENOMEM;
1824
7735730d
CY		 1825 err = f2fs_get_node_info(sbi, xnid, &ni);
1826 if (err) {
1827 f2fs_put_page(page, 1);
1828 return err;
1829 }
442a9dbd
CY		 1830
1831 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1832 len = inode->i_sb->s_blocksize;
1833
1834 f2fs_put_page(page, 1);
1835
1836 flags = FIEMAP_EXTENT_LAST;
1837 }
1838
1839 if (phys)
1840 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1841
1842 return (err < 0 ? err : 0);
1843}
1844
bf38fbad
CY		 1845static loff_t max_inode_blocks(struct inode *inode)
1846{
1847 loff_t result = ADDRS_PER_INODE(inode);
1848 loff_t leaf_count = ADDRS_PER_BLOCK(inode);
1849
1850 /* two direct node blocks */
1851 result += (leaf_count * 2);
1852
1853 /* two indirect node blocks */
1854 leaf_count *= NIDS_PER_BLOCK;
1855 result += (leaf_count * 2);
1856
1857 /* one double indirect node block */
1858 leaf_count *= NIDS_PER_BLOCK;
1859 result += leaf_count;
1860
1861 return result;
1862}
1863
9ab70134
JK		 1864int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1865 u64 start, u64 len)
1866{
7f63eb77
JK		 1867 struct buffer_head map_bh;
1868 sector_t start_blk, last_blk;
da85985c 1869 pgoff_t next_pgofs;
7f63eb77
JK		 1870 u64 logical = 0, phys = 0, size = 0;
1871 u32 flags = 0;
7f63eb77 1872 int ret = 0;
bf38fbad
CY		 1873 bool compr_cluster = false;
1874 unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
7f63eb77 1875
c4020b2d
CY		 1876 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1877 ret = f2fs_precache_extents(inode);
1878 if (ret)
1879 return ret;
1880 }
1881
45dd052e 1882 ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR);
7f63eb77
JK		 1883 if (ret)
1884 return ret;
1885
f1b43d4c
CY		 1886 inode_lock(inode);
1887
442a9dbd
CY		 1888 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1889 ret = f2fs_xattr_fiemap(inode, fieinfo);
1890 goto out;
1891 }
1892
7975f349 1893 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
67f8cf3c
JK		 1894 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1895 if (ret != -EAGAIN)
f1b43d4c 1896 goto out;
67f8cf3c
JK		 1897 }
1898
7f63eb77
JK		 1899 if (logical_to_blk(inode, len) == 0)
1900 len = blk_to_logical(inode, 1);
1901
1902 start_blk = logical_to_blk(inode, start);
1903 last_blk = logical_to_blk(inode, start + len - 1);
9a950d52 1904
7f63eb77
JK		 1905next:
1906 memset(&map_bh, 0, sizeof(struct buffer_head));
1907 map_bh.b_size = len;
1908
bf38fbad
CY		 1909 if (compr_cluster)
1910 map_bh.b_size = blk_to_logical(inode, cluster_size - 1);
1911
e2b4e2bc 1912 ret = get_data_block(inode, start_blk, &map_bh, 0,
da85985c 1913 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
7f63eb77
JK		 1914 if (ret)
1915 goto out;
1916
1917 /* HOLE */
1918 if (!buffer_mapped(&map_bh)) {
da85985c 1919 start_blk = next_pgofs;
58736fa6
CY		 1920
1921 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
bf38fbad 1922 max_inode_blocks(inode)))
9a950d52 1923 goto prep_next;
58736fa6 1924
9a950d52
FL		 1925 flags |= FIEMAP_EXTENT_LAST;
1926 }
7f63eb77 1927
da5af127 1928 if (size) {
62230e0d 1929 if (IS_ENCRYPTED(inode))
da5af127
CY		 1930 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1931
9a950d52
FL		 1932 ret = fiemap_fill_next_extent(fieinfo, logical,
1933 phys, size, flags);
bf38fbad
CY		 1934 if (ret)
1935 goto out;
1936 size = 0;
da5af127 1937 }
7f63eb77 1938
bf38fbad 1939 if (start_blk > last_blk)
9a950d52 1940 goto out;
7f63eb77 1941
bf38fbad
CY		 1942 if (compr_cluster) {
1943 compr_cluster = false;
1944
1945
1946 logical = blk_to_logical(inode, start_blk - 1);
1947 phys = blk_to_logical(inode, map_bh.b_blocknr);
1948 size = blk_to_logical(inode, cluster_size);
1949
1950 flags |= FIEMAP_EXTENT_ENCODED;
1951
1952 start_blk += cluster_size - 1;
1953
1954 if (start_blk > last_blk)
1955 goto out;
1956
1957 goto prep_next;
1958 }
1959
1960 if (map_bh.b_blocknr == COMPRESS_ADDR) {
1961 compr_cluster = true;
1962 start_blk++;
1963 goto prep_next;
1964 }
1965
9a950d52
FL		 1966 logical = blk_to_logical(inode, start_blk);
1967 phys = blk_to_logical(inode, map_bh.b_blocknr);
1968 size = map_bh.b_size;
1969 flags = 0;
1970 if (buffer_unwritten(&map_bh))
1971 flags = FIEMAP_EXTENT_UNWRITTEN;
7f63eb77 1972
9a950d52 1973 start_blk += logical_to_blk(inode, size);
7f63eb77 1974
9a950d52 1975prep_next:
7f63eb77
JK		 1976 cond_resched();
1977 if (fatal_signal_pending(current))
1978 ret = -EINTR;
1979 else
1980 goto next;
1981out:
1982 if (ret == 1)
1983 ret = 0;
1984
5955102c 1985 inode_unlock(inode);
7f63eb77 1986 return ret;
9ab70134
JK		 1987}
1988
95ae251f
EB		 1989static inline loff_t f2fs_readpage_limit(struct inode *inode)
1990{
1991 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1992 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1993 return inode->i_sb->s_maxbytes;
1994
1995 return i_size_read(inode);
1996}
1997
2df0ab04
CY		 1998static int f2fs_read_single_page(struct inode *inode, struct page *page,
1999 unsigned nr_pages,
2000 struct f2fs_map_blocks *map,
2001 struct bio **bio_ret,
2002 sector_t *last_block_in_bio,
2003 bool is_readahead)
2004{
2005 struct bio *bio = *bio_ret;
2006 const unsigned blkbits = inode->i_blkbits;
2007 const unsigned blocksize = 1 << blkbits;
2008 sector_t block_in_file;
2009 sector_t last_block;
2010 sector_t last_block_in_file;
2011 sector_t block_nr;
2012 int ret = 0;
2013
4969c06a 2014 block_in_file = (sector_t)page_index(page);
2df0ab04 2015 last_block = block_in_file + nr_pages;
95ae251f 2016 last_block_in_file = (f2fs_readpage_limit(inode) + blocksize - 1) >>
2df0ab04
CY		 2017 blkbits;
2018 if (last_block > last_block_in_file)
2019 last_block = last_block_in_file;
2020
2021 /* just zeroing out page which is beyond EOF */
2022 if (block_in_file >= last_block)
2023 goto zero_out;
2024 /*
2025 * Map blocks using the previous result first.
2026 */
2027 if ((map->m_flags & F2FS_MAP_MAPPED) &&
2028 block_in_file > map->m_lblk &&
2029 block_in_file < (map->m_lblk + map->m_len))
2030 goto got_it;
2031
2032 /*
2033 * Then do more f2fs_map_blocks() calls until we are
2034 * done with this page.
2035 */
2036 map->m_lblk = block_in_file;
2037 map->m_len = last_block - block_in_file;
2038
2039 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
2040 if (ret)
2041 goto out;
2042got_it:
2043 if ((map->m_flags & F2FS_MAP_MAPPED)) {
2044 block_nr = map->m_pblk + block_in_file - map->m_lblk;
2045 SetPageMappedToDisk(page);
2046
4969c06a
JK		 2047 if (!PageUptodate(page) && (!PageSwapCache(page) &&
2048 !cleancache_get_page(page))) {
2df0ab04
CY		 2049 SetPageUptodate(page);
2050 goto confused;
2051 }
2052
2053 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
93770ab7 2054 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 2055 ret = -EFSCORRUPTED;
2df0ab04
CY		 2056 goto out;
2057 }
2058 } else {
2059zero_out:
2060 zero_user_segment(page, 0, PAGE_SIZE);
95ae251f
EB		 2061 if (f2fs_need_verity(inode, page->index) &&
2062 !fsverity_verify_page(page)) {
2063 ret = -EIO;
2064 goto out;
2065 }
2df0ab04
CY		 2066 if (!PageUptodate(page))
2067 SetPageUptodate(page);
2068 unlock_page(page);
2069 goto out;
2070 }
2071
2072 /*
2073 * This page will go to BIO. Do we need to send this
2074 * BIO off first?
2075 */
8896cbdf
CY		 2076 if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
2077 *last_block_in_bio, block_nr)) {
2df0ab04
CY		 2078submit_and_realloc:
2079 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2080 bio = NULL;
2081 }
2082 if (bio == NULL) {
2083 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
0683728a
CY		 2084 is_readahead ? REQ_RAHEAD : 0, page->index,
2085 false);
2df0ab04
CY		 2086 if (IS_ERR(bio)) {
2087 ret = PTR_ERR(bio);
2088 bio = NULL;
2089 goto out;
2090 }
2091 }
2092
2093 /*
2094 * If the page is under writeback, we need to wait for
2095 * its completion to see the correct decrypted data.
2096 */
2097 f2fs_wait_on_block_writeback(inode, block_nr);
2098
2099 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2100 goto submit_and_realloc;
2101
2102 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
8b83ac81 2103 f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
2df0ab04
CY		 2104 ClearPageError(page);
2105 *last_block_in_bio = block_nr;
2106 goto out;
2107confused:
2108 if (bio) {
2109 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2110 bio = NULL;
2111 }
2112 unlock_page(page);
2113out:
2114 *bio_ret = bio;
2115 return ret;
2116}
2117
4c8ff709
CY		 2118#ifdef CONFIG_F2FS_FS_COMPRESSION
2119int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2120 unsigned nr_pages, sector_t *last_block_in_bio,
0683728a 2121 bool is_readahead, bool for_write)
4c8ff709
CY		 2122{
2123 struct dnode_of_data dn;
2124 struct inode *inode = cc->inode;
2125 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2126 struct bio *bio = *bio_ret;
2127 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2128 sector_t last_block_in_file;
2129 const unsigned blkbits = inode->i_blkbits;
2130 const unsigned blocksize = 1 << blkbits;
2131 struct decompress_io_ctx *dic = NULL;
2132 int i;
2133 int ret = 0;
2134
2135 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2136
7496affa
CY		 2137 last_block_in_file = (f2fs_readpage_limit(inode) +
2138 blocksize - 1) >> blkbits;
4c8ff709
CY		 2139
2140 /* get rid of pages beyond EOF */
2141 for (i = 0; i < cc->cluster_size; i++) {
2142 struct page *page = cc->rpages[i];
2143
2144 if (!page)
2145 continue;
2146 if ((sector_t)page->index >= last_block_in_file) {
2147 zero_user_segment(page, 0, PAGE_SIZE);
2148 if (!PageUptodate(page))
2149 SetPageUptodate(page);
2150 } else if (!PageUptodate(page)) {
2151 continue;
2152 }
2153 unlock_page(page);
2154 cc->rpages[i] = NULL;
2155 cc->nr_rpages--;
2156 }
2157
2158 /* we are done since all pages are beyond EOF */
2159 if (f2fs_cluster_is_empty(cc))
2160 goto out;
2161
2162 set_new_dnode(&dn, inode, NULL, NULL, 0);
2163 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2164 if (ret)
2165 goto out;
2166
2167 /* cluster was overwritten as normal cluster */
2168 if (dn.data_blkaddr != COMPRESS_ADDR)
2169 goto out;
2170
2171 for (i = 1; i < cc->cluster_size; i++) {
2172 block_t blkaddr;
2173
a2ced1ce 2174 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2175 dn.ofs_in_node + i);
2176
2177 if (!__is_valid_data_blkaddr(blkaddr))
2178 break;
2179
2180 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2181 ret = -EFAULT;
2182 goto out_put_dnode;
2183 }
2184 cc->nr_cpages++;
2185 }
2186
2187 /* nothing to decompress */
2188 if (cc->nr_cpages == 0) {
2189 ret = 0;
2190 goto out_put_dnode;
2191 }
2192
2193 dic = f2fs_alloc_dic(cc);
2194 if (IS_ERR(dic)) {
2195 ret = PTR_ERR(dic);
2196 goto out_put_dnode;
2197 }
2198
2199 for (i = 0; i < dic->nr_cpages; i++) {
2200 struct page *page = dic->cpages[i];
2201 block_t blkaddr;
03382f1a 2202 struct bio_post_read_ctx *ctx;
4c8ff709 2203
a2ced1ce 2204 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2205 dn.ofs_in_node + i + 1);
2206
2207 if (bio && !page_is_mergeable(sbi, bio,
2208 *last_block_in_bio, blkaddr)) {
2209submit_and_realloc:
2210 __submit_bio(sbi, bio, DATA);
2211 bio = NULL;
2212 }
2213
2214 if (!bio) {
2215 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2216 is_readahead ? REQ_RAHEAD : 0,
0683728a 2217 page->index, for_write);
4c8ff709
CY		 2218 if (IS_ERR(bio)) {
2219 ret = PTR_ERR(bio);
4c8ff709
CY		 2220 dic->failed = true;
2221 if (refcount_sub_and_test(dic->nr_cpages - i,
f3494345 2222 &dic->ref)) {
4c8ff709
CY		 2223 f2fs_decompress_end_io(dic->rpages,
2224 cc->cluster_size, true,
2225 false);
f3494345
CY		 2226 f2fs_free_dic(dic);
2227 }
4c8ff709 2228 f2fs_put_dnode(&dn);
f3494345 2229 *bio_ret = NULL;
4c8ff709
CY		 2230 return ret;
2231 }
2232 }
2233
2234 f2fs_wait_on_block_writeback(inode, blkaddr);
2235
2236 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2237 goto submit_and_realloc;
2238
03382f1a
CY		 2239 /* tag STEP_DECOMPRESS to handle IO in wq */
2240 ctx = bio->bi_private;
2241 if (!(ctx->enabled_steps & (1 << STEP_DECOMPRESS)))
2242 ctx->enabled_steps |= 1 << STEP_DECOMPRESS;
2243
4c8ff709 2244 inc_page_count(sbi, F2FS_RD_DATA);
8b83ac81 2245 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
9c122384 2246 f2fs_update_iostat(sbi, FS_CDATA_READ_IO, F2FS_BLKSIZE);
4c8ff709
CY		 2247 ClearPageError(page);
2248 *last_block_in_bio = blkaddr;
2249 }
2250
2251 f2fs_put_dnode(&dn);
2252
2253 *bio_ret = bio;
2254 return 0;
2255
2256out_put_dnode:
2257 f2fs_put_dnode(&dn);
2258out:
2259 f2fs_decompress_end_io(cc->rpages, cc->cluster_size, true, false);
2260 *bio_ret = bio;
2261 return ret;
2262}
2263#endif
2264
f1e88660
JK		 2265/*
2266 * This function was originally taken from fs/mpage.c, and customized for f2fs.
2267 * Major change was from block_size == page_size in f2fs by default.
e2e59414
JK		 2268 *
2269 * Note that the aops->readpages() function is ONLY used for read-ahead. If
2270 * this function ever deviates from doing just read-ahead, it should either
2271 * use ->readpage() or do the necessary surgery to decouple ->readpages()
2272 * from read-ahead.
f1e88660 2273 */
e20a7693 2274static int f2fs_mpage_readpages(struct inode *inode,
23323196 2275 struct readahead_control *rac, struct page *page)
f1e88660
JK		 2276{
2277 struct bio *bio = NULL;
f1e88660 2278 sector_t last_block_in_bio = 0;
f1e88660 2279 struct f2fs_map_blocks map;
4c8ff709
CY		 2280#ifdef CONFIG_F2FS_FS_COMPRESSION
2281 struct compress_ctx cc = {
2282 .inode = inode,
2283 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2284 .cluster_size = F2FS_I(inode)->i_cluster_size,
2285 .cluster_idx = NULL_CLUSTER,
2286 .rpages = NULL,
2287 .cpages = NULL,
2288 .nr_rpages = 0,
2289 .nr_cpages = 0,
2290 };
2291#endif
23323196 2292 unsigned nr_pages = rac ? readahead_count(rac) : 1;
4c8ff709 2293 unsigned max_nr_pages = nr_pages;
2df0ab04 2294 int ret = 0;
f1e88660
JK		 2295
2296 map.m_pblk = 0;
2297 map.m_lblk = 0;
2298 map.m_len = 0;
2299 map.m_flags = 0;
da85985c 2300 map.m_next_pgofs = NULL;
c4020b2d 2301 map.m_next_extent = NULL;
d5097be5 2302 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 2303 map.m_may_create = false;
f1e88660 2304
736c0a74 2305 for (; nr_pages; nr_pages--) {
23323196
MWO		 2306 if (rac) {
2307 page = readahead_page(rac);
a83d50bc 2308 prefetchw(&page->flags);
f1e88660
JK		 2309 }
2310
4c8ff709
CY		 2311#ifdef CONFIG_F2FS_FS_COMPRESSION
2312 if (f2fs_compressed_file(inode)) {
2313 /* there are remained comressed pages, submit them */
2314 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2315 ret = f2fs_read_multi_pages(&cc, &bio,
2316 max_nr_pages,
2317 &last_block_in_bio,
23323196 2318 rac != NULL, false);
4c8ff709
CY		 2319 f2fs_destroy_compress_ctx(&cc);
2320 if (ret)
2321 goto set_error_page;
2322 }
2323 ret = f2fs_is_compressed_cluster(inode, page->index);
2324 if (ret < 0)
2325 goto set_error_page;
2326 else if (!ret)
2327 goto read_single_page;
2328
2329 ret = f2fs_init_compress_ctx(&cc);
2330 if (ret)
2331 goto set_error_page;
2332
2333 f2fs_compress_ctx_add_page(&cc, page);
2334
2335 goto next_page;
2336 }
2337read_single_page:
2338#endif
2339
2340 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
23323196 2341 &bio, &last_block_in_bio, rac);
2df0ab04 2342 if (ret) {
4c8ff709
CY		 2343#ifdef CONFIG_F2FS_FS_COMPRESSION
2344set_error_page:
2345#endif
2df0ab04 2346 SetPageError(page);
09cbfeaf 2347 zero_user_segment(page, 0, PAGE_SIZE);
f1e88660 2348 unlock_page(page);
f1e88660 2349 }
23323196 2350#ifdef CONFIG_F2FS_FS_COMPRESSION
f1e88660 2351next_page:
23323196
MWO		 2352#endif
2353 if (rac)
09cbfeaf 2354 put_page(page);
4c8ff709
CY		 2355
2356#ifdef CONFIG_F2FS_FS_COMPRESSION
2357 if (f2fs_compressed_file(inode)) {
2358 /* last page */
2359 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2360 ret = f2fs_read_multi_pages(&cc, &bio,
2361 max_nr_pages,
2362 &last_block_in_bio,
23323196 2363 rac != NULL, false);
4c8ff709
CY		 2364 f2fs_destroy_compress_ctx(&cc);
2365 }
2366 }
2367#endif
f1e88660 2368 }
f1e88660 2369 if (bio)
4fc29c1a 2370 __submit_bio(F2FS_I_SB(inode), bio, DATA);
23323196 2371 return ret;
f1e88660
JK		 2372}
2373
eb47b800
JK		 2374static int f2fs_read_data_page(struct file *file, struct page *page)
2375{
4969c06a 2376 struct inode *inode = page_file_mapping(page)->host;
b3d208f9 2377 int ret = -EAGAIN;
9ffe0fb5 2378
c20e89cd
CY		 2379 trace_f2fs_readpage(page, DATA);
2380
4c8ff709
CY		 2381 if (!f2fs_is_compress_backend_ready(inode)) {
2382 unlock_page(page);
2383 return -EOPNOTSUPP;
2384 }
2385
e1c42045 2386 /* If the file has inline data, try to read it directly */
9ffe0fb5
HL		 2387 if (f2fs_has_inline_data(inode))
2388 ret = f2fs_read_inline_data(inode, page);
b3d208f9 2389 if (ret == -EAGAIN)
e20a7693 2390 ret = f2fs_mpage_readpages(inode, NULL, page);
9ffe0fb5 2391 return ret;
eb47b800
JK		 2392}
2393
23323196 2394static void f2fs_readahead(struct readahead_control *rac)
eb47b800 2395{
23323196 2396 struct inode *inode = rac->mapping->host;
b8c29400 2397
23323196 2398 trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac));
9ffe0fb5 2399
4c8ff709 2400 if (!f2fs_is_compress_backend_ready(inode))
23323196 2401 return;
4c8ff709 2402
9ffe0fb5
HL		 2403 /* If the file has inline data, skip readpages */
2404 if (f2fs_has_inline_data(inode))
23323196 2405 return;
9ffe0fb5 2406
e20a7693 2407 f2fs_mpage_readpages(inode, rac, NULL);
eb47b800
JK		 2408}
2409
4c8ff709 2410int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
7eab0c0d
HP		 2411{
2412 struct inode *inode = fio->page->mapping->host;
4c8ff709 2413 struct page *mpage, *page;
7eab0c0d
HP		 2414 gfp_t gfp_flags = GFP_NOFS;
2415
1958593e 2416 if (!f2fs_encrypted_file(inode))
7eab0c0d
HP		 2417 return 0;
2418
4c8ff709
CY		 2419 page = fio->compressed_page ? fio->compressed_page : fio->page;
2420
6dbb1796 2421 /* wait for GCed page writeback via META_MAPPING */
0ded69f6 2422 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
7eab0c0d
HP		 2423
2424retry_encrypt:
4c8ff709
CY		 2425 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2426 PAGE_SIZE, 0, gfp_flags);
6aa58d8a
CY		 2427 if (IS_ERR(fio->encrypted_page)) {
2428 /* flush pending IOs and wait for a while in the ENOMEM case */
2429 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2430 f2fs_flush_merged_writes(fio->sbi);
5df7731f 2431 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
6aa58d8a
CY		 2432 gfp_flags |= __GFP_NOFAIL;
2433 goto retry_encrypt;
2434 }
2435 return PTR_ERR(fio->encrypted_page);
2436 }
7eab0c0d 2437
6aa58d8a
CY		 2438 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2439 if (mpage) {
2440 if (PageUptodate(mpage))
2441 memcpy(page_address(mpage),
2442 page_address(fio->encrypted_page), PAGE_SIZE);
2443 f2fs_put_page(mpage, 1);
7eab0c0d 2444 }
6aa58d8a 2445 return 0;
7eab0c0d
HP		 2446}
2447
bb9e3bb8
CY		 2448static inline bool check_inplace_update_policy(struct inode *inode,
2449 struct f2fs_io_info *fio)
7eab0c0d 2450{
bb9e3bb8
CY		 2451 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2452 unsigned int policy = SM_I(sbi)->ipu_policy;
7eab0c0d 2453
bb9e3bb8
CY		 2454 if (policy & (0x1 << F2FS_IPU_FORCE))
2455 return true;
4d57b86d 2456 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
bb9e3bb8
CY		 2457 return true;
2458 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2459 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2460 return true;
4d57b86d 2461 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
bb9e3bb8
CY		 2462 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2463 return true;
2464
2465 /*
2466 * IPU for rewrite async pages
2467 */
2468 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2469 fio && fio->op == REQ_OP_WRITE &&
2470 !(fio->op_flags & REQ_SYNC) &&
62230e0d 2471 !IS_ENCRYPTED(inode))
bb9e3bb8
CY		 2472 return true;
2473
2474 /* this is only set during fdatasync */
2475 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2476 is_inode_flag_set(inode, FI_NEED_IPU))
2477 return true;
2478
4354994f
DR		 2479 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2480 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2481 return true;
2482
bb9e3bb8
CY		 2483 return false;
2484}
2485
4d57b86d 2486bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8 2487{
1ad71a27
JK		 2488 if (f2fs_is_pinned_file(inode))
2489 return true;
bb9e3bb8
CY		 2490
2491 /* if this is cold file, we should overwrite to avoid fragmentation */
2492 if (file_is_cold(inode))
2493 return true;
2494
2495 return check_inplace_update_policy(inode, fio);
2496}
2497
4d57b86d 2498bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8
CY		 2499{
2500 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2501
b0332a0f 2502 if (f2fs_lfs_mode(sbi))
bb9e3bb8
CY		 2503 return true;
2504 if (S_ISDIR(inode->i_mode))
2505 return true;
af033b2a
CY		 2506 if (IS_NOQUOTA(inode))
2507 return true;
bb9e3bb8
CY		 2508 if (f2fs_is_atomic_file(inode))
2509 return true;
2510 if (fio) {
2511 if (is_cold_data(fio->page))
2512 return true;
2513 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
2514 return true;
4354994f
DR		 2515 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2516 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2517 return true;
bb9e3bb8
CY		 2518 }
2519 return false;
2520}
2521
7eab0c0d
HP		 2522static inline bool need_inplace_update(struct f2fs_io_info *fio)
2523{
2524 struct inode *inode = fio->page->mapping->host;
2525
4d57b86d 2526 if (f2fs_should_update_outplace(inode, fio))
7eab0c0d
HP		 2527 return false;
2528
4d57b86d 2529 return f2fs_should_update_inplace(inode, fio);
7eab0c0d
HP		 2530}
2531
4d57b86d 2532int f2fs_do_write_data_page(struct f2fs_io_info *fio)
eb47b800 2533{
05ca3632 2534 struct page *page = fio->page;
eb47b800 2535 struct inode *inode = page->mapping->host;
eb47b800 2536 struct dnode_of_data dn;
e959c8f5 2537 struct extent_info ei = {0,0,0};
7735730d 2538 struct node_info ni;
e959c8f5 2539 bool ipu_force = false;
eb47b800
JK		 2540 int err = 0;
2541
2542 set_new_dnode(&dn, inode, NULL, NULL, 0);
e959c8f5
HP		 2543 if (need_inplace_update(fio) &&
2544 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2545 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
a817737e 2546
c9b60788 2547 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2548 DATA_GENERIC_ENHANCE))
10f966bb 2549 return -EFSCORRUPTED;
c9b60788
CY		 2550
2551 ipu_force = true;
2552 fio->need_lock = LOCK_DONE;
2553 goto got_it;
e959c8f5 2554 }
279d6df2 2555
d29460e5
JK		 2556 /* Deadlock due to between page->lock and f2fs_lock_op */
2557 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2558 return -EAGAIN;
279d6df2 2559
4d57b86d 2560 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
eb47b800 2561 if (err)
279d6df2 2562 goto out;
eb47b800 2563
28bc106b 2564 fio->old_blkaddr = dn.data_blkaddr;
eb47b800
JK		 2565
2566 /* This page is already truncated */
7a9d7548 2567 if (fio->old_blkaddr == NULL_ADDR) {
2bca1e23 2568 ClearPageUptodate(page);
2baf0781 2569 clear_cold_data(page);
eb47b800 2570 goto out_writepage;
2bca1e23 2571 }
e959c8f5 2572got_it:
c9b60788
CY		 2573 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2574 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2575 DATA_GENERIC_ENHANCE)) {
10f966bb 2576 err = -EFSCORRUPTED;
c9b60788
CY		 2577 goto out_writepage;
2578 }
eb47b800
JK		 2579 /*
2580 * If current allocation needs SSR,
2581 * it had better in-place writes for updated data.
2582 */
93770ab7
CY		 2583 if (ipu_force ||
2584 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
7b525dd0 2585 need_inplace_update(fio))) {
4c8ff709 2586 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2587 if (err)
2588 goto out_writepage;
2589
2590 set_page_writeback(page);
17c50035 2591 ClearPageError(page);
279d6df2 2592 f2fs_put_dnode(&dn);
cc15620b 2593 if (fio->need_lock == LOCK_REQ)
279d6df2 2594 f2fs_unlock_op(fio->sbi);
4d57b86d 2595 err = f2fs_inplace_write_data(fio);
6492a335
CY		 2596 if (err) {
2597 if (f2fs_encrypted_file(inode))
d2d0727b 2598 fscrypt_finalize_bounce_page(&fio->encrypted_page);
6492a335
CY		 2599 if (PageWriteback(page))
2600 end_page_writeback(page);
cd23ffa9
CY		 2601 } else {
2602 set_inode_flag(inode, FI_UPDATE_WRITE);
6492a335 2603 }
7eab0c0d 2604 trace_f2fs_do_write_data_page(fio->page, IPU);
279d6df2 2605 return err;
eb47b800 2606 }
279d6df2 2607
cc15620b
JK		 2608 if (fio->need_lock == LOCK_RETRY) {
2609 if (!f2fs_trylock_op(fio->sbi)) {
2610 err = -EAGAIN;
2611 goto out_writepage;
2612 }
2613 fio->need_lock = LOCK_REQ;
2614 }
2615
7735730d
CY		 2616 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2617 if (err)
2618 goto out_writepage;
2619
2620 fio->version = ni.version;
2621
4c8ff709 2622 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2623 if (err)
2624 goto out_writepage;
2625
2626 set_page_writeback(page);
17c50035 2627 ClearPageError(page);
cc15620b 2628
4c8ff709
CY		 2629 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2630 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2631
279d6df2 2632 /* LFS mode write path */
4d57b86d 2633 f2fs_outplace_write_data(&dn, fio);
279d6df2
HP		 2634 trace_f2fs_do_write_data_page(page, OPU);
2635 set_inode_flag(inode, FI_APPEND_WRITE);
2636 if (page->index == 0)
2637 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
eb47b800
JK		 2638out_writepage:
2639 f2fs_put_dnode(&dn);
279d6df2 2640out:
cc15620b 2641 if (fio->need_lock == LOCK_REQ)
279d6df2 2642 f2fs_unlock_op(fio->sbi);
eb47b800
JK		 2643 return err;
2644}
2645
4c8ff709 2646int f2fs_write_single_data_page(struct page *page, int *submitted,
8648de2c
CY		 2647 struct bio **bio,
2648 sector_t *last_block,
b0af6d49 2649 struct writeback_control *wbc,
4c8ff709
CY		 2650 enum iostat_type io_type,
2651 int compr_blocks)
eb47b800
JK		 2652{
2653 struct inode *inode = page->mapping->host;
4081363f 2654 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
eb47b800 2655 loff_t i_size = i_size_read(inode);
4c8ff709 2656 const pgoff_t end_index = ((unsigned long long)i_size)
09cbfeaf 2657 >> PAGE_SHIFT;
1f0d5c91 2658 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
9ffe0fb5 2659 unsigned offset = 0;
39936837 2660 bool need_balance_fs = false;
eb47b800 2661 int err = 0;
458e6197 2662 struct f2fs_io_info fio = {
05ca3632 2663 .sbi = sbi,
39d787be 2664 .ino = inode->i_ino,
458e6197 2665 .type = DATA,
04d328de 2666 .op = REQ_OP_WRITE,
7637241e 2667 .op_flags = wbc_to_write_flags(wbc),
e959c8f5 2668 .old_blkaddr = NULL_ADDR,
05ca3632 2669 .page = page,
4375a336 2670 .encrypted_page = NULL,
d68f735b 2671 .submitted = false,
4c8ff709 2672 .compr_blocks = compr_blocks,
cc15620b 2673 .need_lock = LOCK_RETRY,
b0af6d49 2674 .io_type = io_type,
578c6478 2675 .io_wbc = wbc,
8648de2c
CY		 2676 .bio = bio,
2677 .last_block = last_block,
458e6197 2678 };
eb47b800 2679
ecda0de3
CY		 2680 trace_f2fs_writepage(page, DATA);
2681
db198ae0
CY		 2682 /* we should bypass data pages to proceed the kworkder jobs */
2683 if (unlikely(f2fs_cp_error(sbi))) {
2684 mapping_set_error(page->mapping, -EIO);
1174abfd
CY		 2685 /*
2686 * don't drop any dirty dentry pages for keeping lastest
2687 * directory structure.
2688 */
2689 if (S_ISDIR(inode->i_mode))
2690 goto redirty_out;
db198ae0
CY		 2691 goto out;
2692 }
2693
0771fcc7
CY		 2694 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2695 goto redirty_out;
2696
4c8ff709
CY		 2697 if (page->index < end_index ||
2698 f2fs_verity_in_progress(inode) ||
2699 compr_blocks)
39936837 2700 goto write;
eb47b800
JK		 2701
2702 /*
2703 * If the offset is out-of-range of file size,
2704 * this page does not have to be written to disk.
2705 */
09cbfeaf 2706 offset = i_size & (PAGE_SIZE - 1);
76f60268 2707 if ((page->index >= end_index + 1) || !offset)
39936837 2708 goto out;
eb47b800 2709
09cbfeaf 2710 zero_user_segment(page, offset, PAGE_SIZE);
39936837 2711write:
1e84371f
JK		 2712 if (f2fs_is_drop_cache(inode))
2713 goto out;
e6e5f561
JK		 2714 /* we should not write 0'th page having journal header */
2715 if (f2fs_is_volatile_file(inode) && (!page->index ||
2716 (!wbc->for_reclaim &&
4d57b86d 2717 f2fs_available_free_memory(sbi, BASE_CHECK))))
1e84371f 2718 goto redirty_out;
eb47b800 2719
435cbab9
JK		 2720 /* Dentry/quota blocks are controlled by checkpoint */
2721 if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
cc15620b 2722 fio.need_lock = LOCK_DONE;
4d57b86d 2723 err = f2fs_do_write_data_page(&fio);
8618b881
JK		 2724 goto done;
2725 }
9ffe0fb5 2726
8618b881 2727 if (!wbc->for_reclaim)
39936837 2728 need_balance_fs = true;
7f3037a5 2729 else if (has_not_enough_free_secs(sbi, 0, 0))
39936837 2730 goto redirty_out;
ef095d19
JK		 2731 else
2732 set_inode_flag(inode, FI_HOT_DATA);
eb47b800 2733
b3d208f9 2734 err = -EAGAIN;
dd7b2333 2735 if (f2fs_has_inline_data(inode)) {
b3d208f9 2736 err = f2fs_write_inline_data(inode, page);
dd7b2333
YH		 2737 if (!err)
2738 goto out;
2739 }
279d6df2 2740
cc15620b 2741 if (err == -EAGAIN) {
4d57b86d 2742 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2743 if (err == -EAGAIN) {
2744 fio.need_lock = LOCK_REQ;
4d57b86d 2745 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2746 }
2747 }
a0d00fad 2748
eb449797
CY		 2749 if (err) {
2750 file_set_keep_isize(inode);
2751 } else {
c10c9820 2752 spin_lock(&F2FS_I(inode)->i_size_lock);
eb449797
CY		 2753 if (F2FS_I(inode)->last_disk_size < psize)
2754 F2FS_I(inode)->last_disk_size = psize;
c10c9820 2755 spin_unlock(&F2FS_I(inode)->i_size_lock);
eb449797 2756 }
279d6df2 2757
8618b881
JK		 2758done:
2759 if (err && err != -ENOENT)
2760 goto redirty_out;
eb47b800 2761
39936837 2762out:
a7ffdbe2 2763 inode_dec_dirty_pages(inode);
2baf0781 2764 if (err) {
2bca1e23 2765 ClearPageUptodate(page);
2baf0781
CY		 2766 clear_cold_data(page);
2767 }
0c3a5797
CY		 2768
2769 if (wbc->for_reclaim) {
bab475c5 2770 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
ef095d19 2771 clear_inode_flag(inode, FI_HOT_DATA);
4d57b86d 2772 f2fs_remove_dirty_inode(inode);
d68f735b 2773 submitted = NULL;
0c3a5797 2774 }
eb47b800 2775 unlock_page(page);
186857c5 2776 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
0b20fcec 2777 !F2FS_I(inode)->cp_task)
a7881893 2778 f2fs_balance_fs(sbi, need_balance_fs);
0c3a5797 2779
d68f735b 2780 if (unlikely(f2fs_cp_error(sbi))) {
b9109b0e 2781 f2fs_submit_merged_write(sbi, DATA);
0b20fcec 2782 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
d68f735b
JK		 2783 submitted = NULL;
2784 }
2785
2786 if (submitted)
4c8ff709 2787 *submitted = fio.submitted ? 1 : 0;
0c3a5797 2788
eb47b800
JK		 2789 return 0;
2790
eb47b800 2791redirty_out:
76f60268 2792 redirty_page_for_writepage(wbc, page);
5b19d284
JK		 2793 /*
2794 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2795 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2796 * file_write_and_wait_range() will see EIO error, which is critical
2797 * to return value of fsync() followed by atomic_write failure to user.
2798 */
2799 if (!err || wbc->for_reclaim)
0002b61b 2800 return AOP_WRITEPAGE_ACTIVATE;
b230e6ca
JK		 2801 unlock_page(page);
2802 return err;
fa9150a8
NJ		 2803}
2804
f566bae8
JK		 2805static int f2fs_write_data_page(struct page *page,
2806 struct writeback_control *wbc)
2807{
4c8ff709
CY		 2808#ifdef CONFIG_F2FS_FS_COMPRESSION
2809 struct inode *inode = page->mapping->host;
2810
2811 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2812 goto out;
2813
2814 if (f2fs_compressed_file(inode)) {
2815 if (f2fs_is_compressed_cluster(inode, page->index)) {
2816 redirty_page_for_writepage(wbc, page);
2817 return AOP_WRITEPAGE_ACTIVATE;
2818 }
2819 }
2820out:
2821#endif
2822
2823 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
2824 wbc, FS_DATA_IO, 0);
f566bae8
JK		 2825}
2826
8f46dcae
CY		 2827/*
2828 * This function was copied from write_cche_pages from mm/page-writeback.c.
2829 * The major change is making write step of cold data page separately from
2830 * warm/hot data page.
2831 */
2832static int f2fs_write_cache_pages(struct address_space *mapping,
b0af6d49
CY		 2833 struct writeback_control *wbc,
2834 enum iostat_type io_type)
8f46dcae
CY		 2835{
2836 int ret = 0;
4c8ff709 2837 int done = 0, retry = 0;
8f46dcae 2838 struct pagevec pvec;
c29fd0c0 2839 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
8648de2c
CY		 2840 struct bio *bio = NULL;
2841 sector_t last_block;
4c8ff709
CY		 2842#ifdef CONFIG_F2FS_FS_COMPRESSION
2843 struct inode *inode = mapping->host;
2844 struct compress_ctx cc = {
2845 .inode = inode,
2846 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2847 .cluster_size = F2FS_I(inode)->i_cluster_size,
2848 .cluster_idx = NULL_CLUSTER,
2849 .rpages = NULL,
2850 .nr_rpages = 0,
2851 .cpages = NULL,
2852 .rbuf = NULL,
2853 .cbuf = NULL,
2854 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2855 .private = NULL,
2856 };
2857#endif
8f46dcae
CY		 2858 int nr_pages;
2859 pgoff_t uninitialized_var(writeback_index);
2860 pgoff_t index;
2861 pgoff_t end; /* Inclusive */
2862 pgoff_t done_index;
8f46dcae 2863 int range_whole = 0;
10bbd235 2864 xa_mark_t tag;
bab475c5 2865 int nwritten = 0;
4c8ff709
CY		 2866 int submitted = 0;
2867 int i;
8f46dcae 2868
86679820 2869 pagevec_init(&pvec);
46ae957f 2870
ef095d19
JK		 2871 if (get_dirty_pages(mapping->host) <=
2872 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2873 set_inode_flag(mapping->host, FI_HOT_DATA);
2874 else
2875 clear_inode_flag(mapping->host, FI_HOT_DATA);
2876
8f46dcae
CY		 2877 if (wbc->range_cyclic) {
2878 writeback_index = mapping->writeback_index; /* prev offset */
2879 index = writeback_index;
8f46dcae
CY		 2880 end = -1;
2881 } else {
09cbfeaf
KS		 2882 index = wbc->range_start >> PAGE_SHIFT;
2883 end = wbc->range_end >> PAGE_SHIFT;
8f46dcae
CY		 2884 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2885 range_whole = 1;
8f46dcae
CY		 2886 }
2887 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2888 tag = PAGECACHE_TAG_TOWRITE;
2889 else
2890 tag = PAGECACHE_TAG_DIRTY;
2891retry:
4c8ff709 2892 retry = 0;
8f46dcae
CY		 2893 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2894 tag_pages_for_writeback(mapping, index, end);
2895 done_index = index;
4c8ff709 2896 while (!done && !retry && (index <= end)) {
69c4f35d 2897 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
67fd707f 2898 tag);
8f46dcae
CY		 2899 if (nr_pages == 0)
2900 break;
2901
2902 for (i = 0; i < nr_pages; i++) {
2903 struct page *page = pvec.pages[i];
4c8ff709
CY		 2904 bool need_readd;
2905readd:
2906 need_readd = false;
2907#ifdef CONFIG_F2FS_FS_COMPRESSION
2908 if (f2fs_compressed_file(inode)) {
2909 ret = f2fs_init_compress_ctx(&cc);
2910 if (ret) {
2911 done = 1;
2912 break;
2913 }
2914
2915 if (!f2fs_cluster_can_merge_page(&cc,
2916 page->index)) {
2917 ret = f2fs_write_multi_pages(&cc,
2918 &submitted, wbc, io_type);
2919 if (!ret)
2920 need_readd = true;
2921 goto result;
2922 }
8f46dcae 2923
4c8ff709
CY		 2924 if (unlikely(f2fs_cp_error(sbi)))
2925 goto lock_page;
2926
2927 if (f2fs_cluster_is_empty(&cc)) {
2928 void *fsdata = NULL;
2929 struct page *pagep;
2930 int ret2;
2931
2932 ret2 = f2fs_prepare_compress_overwrite(
2933 inode, &pagep,
2934 page->index, &fsdata);
2935 if (ret2 < 0) {
2936 ret = ret2;
2937 done = 1;
2938 break;
2939 } else if (ret2 &&
2940 !f2fs_compress_write_end(inode,
2941 fsdata, page->index,
2942 1)) {
2943 retry = 1;
2944 break;
2945 }
2946 } else {
2947 goto lock_page;
2948 }
2949 }
2950#endif
f8de4331 2951 /* give a priority to WB_SYNC threads */
c29fd0c0 2952 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
f8de4331
CY		 2953 wbc->sync_mode == WB_SYNC_NONE) {
2954 done = 1;
2955 break;
2956 }
4c8ff709
CY		 2957#ifdef CONFIG_F2FS_FS_COMPRESSION
2958lock_page:
2959#endif
8f46dcae 2960 done_index = page->index;
d29460e5 2961retry_write:
8f46dcae
CY		 2962 lock_page(page);
2963
2964 if (unlikely(page->mapping != mapping)) {
2965continue_unlock:
2966 unlock_page(page);
2967 continue;
2968 }
2969
2970 if (!PageDirty(page)) {
2971 /* someone wrote it for us */
2972 goto continue_unlock;
2973 }
2974
8f46dcae 2975 if (PageWriteback(page)) {
0b20fcec 2976 if (wbc->sync_mode != WB_SYNC_NONE)
fec1d657 2977 f2fs_wait_on_page_writeback(page,
bae0ee7a 2978 DATA, true, true);
0b20fcec 2979 else
8f46dcae
CY		 2980 goto continue_unlock;
2981 }
2982
8f46dcae
CY		 2983 if (!clear_page_dirty_for_io(page))
2984 goto continue_unlock;
2985
4c8ff709
CY		 2986#ifdef CONFIG_F2FS_FS_COMPRESSION
2987 if (f2fs_compressed_file(inode)) {
2988 get_page(page);
2989 f2fs_compress_ctx_add_page(&cc, page);
2990 continue;
2991 }
2992#endif
2993 ret = f2fs_write_single_data_page(page, &submitted,
2994 &bio, &last_block, wbc, io_type, 0);
2995 if (ret == AOP_WRITEPAGE_ACTIVATE)
2996 unlock_page(page);
2997#ifdef CONFIG_F2FS_FS_COMPRESSION
2998result:
2999#endif
3000 nwritten += submitted;
3001 wbc->nr_to_write -= submitted;
3002
8f46dcae 3003 if (unlikely(ret)) {
0002b61b
CY		 3004 /*
3005 * keep nr_to_write, since vfs uses this to
3006 * get # of written pages.
3007 */
3008 if (ret == AOP_WRITEPAGE_ACTIVATE) {
0002b61b 3009 ret = 0;
4c8ff709 3010 goto next;
d29460e5
JK		 3011 } else if (ret == -EAGAIN) {
3012 ret = 0;
3013 if (wbc->sync_mode == WB_SYNC_ALL) {
3014 cond_resched();
3015 congestion_wait(BLK_RW_ASYNC,
5df7731f 3016 DEFAULT_IO_TIMEOUT);
d29460e5
JK		 3017 goto retry_write;
3018 }
4c8ff709 3019 goto next;
0002b61b 3020 }
b230e6ca
JK		 3021 done_index = page->index + 1;
3022 done = 1;
3023 break;
8f46dcae
CY		 3024 }
3025
4c8ff709 3026 if (wbc->nr_to_write <= 0 &&
687de7f1 3027 wbc->sync_mode == WB_SYNC_NONE) {
8f46dcae
CY		 3028 done = 1;
3029 break;
3030 }
4c8ff709
CY		 3031next:
3032 if (need_readd)
3033 goto readd;
8f46dcae
CY		 3034 }
3035 pagevec_release(&pvec);
3036 cond_resched();
3037 }
4c8ff709
CY		 3038#ifdef CONFIG_F2FS_FS_COMPRESSION
3039 /* flush remained pages in compress cluster */
3040 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
3041 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
3042 nwritten += submitted;
3043 wbc->nr_to_write -= submitted;
3044 if (ret) {
3045 done = 1;
3046 retry = 0;
3047 }
3048 }
3049#endif
e78790f8 3050 if (retry) {
8f46dcae 3051 index = 0;
e78790f8 3052 end = -1;
8f46dcae
CY		 3053 goto retry;
3054 }
e78790f8
ST		 3055 if (wbc->range_cyclic && !done)
3056 done_index = 0;
8f46dcae
CY		 3057 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
3058 mapping->writeback_index = done_index;
3059
bab475c5 3060 if (nwritten)
b9109b0e 3061 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
bab475c5 3062 NULL, 0, DATA);
8648de2c
CY		 3063 /* submit cached bio of IPU write */
3064 if (bio)
0b20fcec 3065 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
6ca56ca4 3066
8f46dcae
CY		 3067 return ret;
3068}
3069
853137ce
JK		 3070static inline bool __should_serialize_io(struct inode *inode,
3071 struct writeback_control *wbc)
3072{
b13f67ff
CY		 3073 /* to avoid deadlock in path of data flush */
3074 if (F2FS_I(inode)->cp_task)
3075 return false;
3076
853137ce
JK		 3077 if (!S_ISREG(inode->i_mode))
3078 return false;
af033b2a
CY		 3079 if (IS_NOQUOTA(inode))
3080 return false;
b13f67ff
CY		 3081
3082 if (f2fs_compressed_file(inode))
3083 return true;
853137ce
JK		 3084 if (wbc->sync_mode != WB_SYNC_ALL)
3085 return true;
3086 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
3087 return true;
3088 return false;
3089}
3090
fc99fe27 3091static int __f2fs_write_data_pages(struct address_space *mapping,
b0af6d49
CY		 3092 struct writeback_control *wbc,
3093 enum iostat_type io_type)
eb47b800
JK		 3094{
3095 struct inode *inode = mapping->host;
4081363f 3096 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9dfa1baf 3097 struct blk_plug plug;
eb47b800 3098 int ret;
853137ce 3099 bool locked = false;
eb47b800 3100
cfb185a1 3101 /* deal with chardevs and other special file */
3102 if (!mapping->a_ops->writepage)
3103 return 0;
3104
6a290544
CY		 3105 /* skip writing if there is no dirty page in this inode */
3106 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3107 return 0;
3108
0771fcc7
CY		 3109 /* during POR, we don't need to trigger writepage at all. */
3110 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3111 goto skip_write;
3112
af033b2a
CY		 3113 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3114 wbc->sync_mode == WB_SYNC_NONE &&
a1257023 3115 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
4d57b86d 3116 f2fs_available_free_memory(sbi, DIRTY_DENTS))
a1257023
JK		 3117 goto skip_write;
3118
d323d005 3119 /* skip writing during file defragment */
91942321 3120 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
d323d005
CY		 3121 goto skip_write;
3122
d31c7c3f
YH		 3123 trace_f2fs_writepages(mapping->host, wbc, DATA);
3124
687de7f1
JK		 3125 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
3126 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0
CY		 3127 atomic_inc(&sbi->wb_sync_req[DATA]);
3128 else if (atomic_read(&sbi->wb_sync_req[DATA]))
687de7f1
JK		 3129 goto skip_write;
3130
853137ce
JK		 3131 if (__should_serialize_io(inode, wbc)) {
3132 mutex_lock(&sbi->writepages);
3133 locked = true;
3134 }
3135
9dfa1baf 3136 blk_start_plug(&plug);
b0af6d49 3137 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
9dfa1baf 3138 blk_finish_plug(&plug);
687de7f1 3139
853137ce
JK		 3140 if (locked)
3141 mutex_unlock(&sbi->writepages);
3142
687de7f1 3143 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0 3144 atomic_dec(&sbi->wb_sync_req[DATA]);
28ea6162
JK		 3145 /*
3146 * if some pages were truncated, we cannot guarantee its mapping->host
3147 * to detect pending bios.
3148 */
458e6197 3149
4d57b86d 3150 f2fs_remove_dirty_inode(inode);
eb47b800 3151 return ret;
d3baf95d
JK		 3152
3153skip_write:
a7ffdbe2 3154 wbc->pages_skipped += get_dirty_pages(inode);
d31c7c3f 3155 trace_f2fs_writepages(mapping->host, wbc, DATA);
d3baf95d 3156 return 0;
eb47b800
JK		 3157}
3158
b0af6d49
CY		 3159static int f2fs_write_data_pages(struct address_space *mapping,
3160 struct writeback_control *wbc)
3161{
3162 struct inode *inode = mapping->host;
3163
3164 return __f2fs_write_data_pages(mapping, wbc,
3165 F2FS_I(inode)->cp_task == current ?
3166 FS_CP_DATA_IO : FS_DATA_IO);
3167}
3168
3aab8f82
CY		 3169static void f2fs_write_failed(struct address_space *mapping, loff_t to)
3170{
3171 struct inode *inode = mapping->host;
819d9153 3172 loff_t i_size = i_size_read(inode);
3aab8f82 3173
3f188c23
JK		 3174 if (IS_NOQUOTA(inode))
3175 return;
3176
95ae251f
EB		 3177 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
3178 if (to > i_size && !f2fs_verity_in_progress(inode)) {
a33c1502 3179 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
6f8d4455 3180 down_write(&F2FS_I(inode)->i_mmap_sem);
a33c1502 3181
819d9153 3182 truncate_pagecache(inode, i_size);
3f188c23 3183 f2fs_truncate_blocks(inode, i_size, true);
a33c1502 3184
5a3a2d83 3185 up_write(&F2FS_I(inode)->i_mmap_sem);
6f8d4455 3186 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3aab8f82
CY		 3187 }
3188}
3189
2aadac08
JK		 3190static int prepare_write_begin(struct f2fs_sb_info *sbi,
3191 struct page *page, loff_t pos, unsigned len,
3192 block_t *blk_addr, bool *node_changed)
3193{
3194 struct inode *inode = page->mapping->host;
3195 pgoff_t index = page->index;
3196 struct dnode_of_data dn;
3197 struct page *ipage;
b4d07a3e 3198 bool locked = false;
e15882b6 3199 struct extent_info ei = {0,0,0};
2aadac08 3200 int err = 0;
2866fb16 3201 int flag;
2aadac08 3202
24b84912
JK		 3203 /*
3204 * we already allocated all the blocks, so we don't need to get
3205 * the block addresses when there is no need to fill the page.
3206 */
dc91de78 3207 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
95ae251f
EB		 3208 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
3209 !f2fs_verity_in_progress(inode))
24b84912
JK		 3210 return 0;
3211
2866fb16
SY		 3212 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
3213 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3214 flag = F2FS_GET_BLOCK_DEFAULT;
3215 else
3216 flag = F2FS_GET_BLOCK_PRE_AIO;
3217
b4d07a3e 3218 if (f2fs_has_inline_data(inode) ||
09cbfeaf 3219 (pos & PAGE_MASK) >= i_size_read(inode)) {
2866fb16 3220 __do_map_lock(sbi, flag, true);
b4d07a3e
JK		 3221 locked = true;
3222 }
4c8ff709 3223
b4d07a3e 3224restart:
2aadac08 3225 /* check inline_data */
4d57b86d 3226 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2aadac08
JK		 3227 if (IS_ERR(ipage)) {
3228 err = PTR_ERR(ipage);
3229 goto unlock_out;
3230 }
3231
3232 set_new_dnode(&dn, inode, ipage, ipage, 0);
3233
3234 if (f2fs_has_inline_data(inode)) {
f2470371 3235 if (pos + len <= MAX_INLINE_DATA(inode)) {
4d57b86d 3236 f2fs_do_read_inline_data(page, ipage);
91942321 3237 set_inode_flag(inode, FI_DATA_EXIST);
ab47036d
CY		 3238 if (inode->i_nlink)
3239 set_inline_node(ipage);
2aadac08
JK		 3240 } else {
3241 err = f2fs_convert_inline_page(&dn, page);
3242 if (err)
b4d07a3e
JK		 3243 goto out;
3244 if (dn.data_blkaddr == NULL_ADDR)
3245 err = f2fs_get_block(&dn, index);
3246 }
3247 } else if (locked) {
3248 err = f2fs_get_block(&dn, index);
3249 } else {
3250 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3251 dn.data_blkaddr = ei.blk + index - ei.fofs;
3252 } else {
b4d07a3e 3253 /* hole case */
4d57b86d 3254 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
4da7bf5a 3255 if (err || dn.data_blkaddr == NULL_ADDR) {
b4d07a3e 3256 f2fs_put_dnode(&dn);
59c9081b
YH		 3257 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
3258 true);
2866fb16 3259 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
b4d07a3e
JK		 3260 locked = true;
3261 goto restart;
3262 }
2aadac08
JK		 3263 }
3264 }
b4d07a3e 3265
2aadac08
JK		 3266 /* convert_inline_page can make node_changed */
3267 *blk_addr = dn.data_blkaddr;
3268 *node_changed = dn.node_changed;
b4d07a3e 3269out:
2aadac08
JK		 3270 f2fs_put_dnode(&dn);
3271unlock_out:
b4d07a3e 3272 if (locked)
2866fb16 3273 __do_map_lock(sbi, flag, false);
2aadac08
JK		 3274 return err;
3275}
3276
eb47b800
JK		 3277static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3278 loff_t pos, unsigned len, unsigned flags,
3279 struct page **pagep, void **fsdata)
3280{
3281 struct inode *inode = mapping->host;
4081363f 3282 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86531d6b 3283 struct page *page = NULL;
09cbfeaf 3284 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
a2e2e76b 3285 bool need_balance = false, drop_atomic = false;
2aadac08 3286 block_t blkaddr = NULL_ADDR;
eb47b800
JK		 3287 int err = 0;
3288
62aed044
CY		 3289 trace_f2fs_write_begin(inode, pos, len, flags);
3290
00e09c0b
CY		 3291 if (!f2fs_is_checkpoint_ready(sbi)) {
3292 err = -ENOSPC;
4354994f 3293 goto fail;
00e09c0b 3294 }
4354994f 3295
455e3a58
JK		 3296 if ((f2fs_is_atomic_file(inode) &&
3297 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3298 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
57864ae5 3299 err = -ENOMEM;
a2e2e76b 3300 drop_atomic = true;
57864ae5
JK		 3301 goto fail;
3302 }
3303
5f727395
JK		 3304 /*
3305 * We should check this at this moment to avoid deadlock on inode page
3306 * and #0 page. The locking rule for inline_data conversion should be:
3307 * lock_page(page #0) -> lock_page(inode_page)
3308 */
3309 if (index != 0) {
3310 err = f2fs_convert_inline_inode(inode);
3311 if (err)
3312 goto fail;
3313 }
4c8ff709
CY		 3314
3315#ifdef CONFIG_F2FS_FS_COMPRESSION
3316 if (f2fs_compressed_file(inode)) {
3317 int ret;
3318
3319 *fsdata = NULL;
3320
3321 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3322 index, fsdata);
3323 if (ret < 0) {
3324 err = ret;
3325 goto fail;
3326 } else if (ret) {
3327 return 0;
3328 }
3329 }
3330#endif
3331
afcb7ca0 3332repeat:
86d54795
JK		 3333 /*
3334 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
3335 * wait_for_stable_page. Will wait that below with our IO control.
3336 */
01eccef7 3337 page = f2fs_pagecache_get_page(mapping, index,
86d54795 3338 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3aab8f82
CY		 3339 if (!page) {
3340 err = -ENOMEM;
3341 goto fail;
3342 }
d5f66990 3343
4c8ff709
CY		 3344 /* TODO: cluster can be compressed due to race with .writepage */
3345
eb47b800
JK		 3346 *pagep = page;
3347
2aadac08
JK		 3348 err = prepare_write_begin(sbi, page, pos, len,
3349 &blkaddr, &need_balance);
9ba69cf9 3350 if (err)
2aadac08 3351 goto fail;
9ba69cf9 3352
af033b2a
CY		 3353 if (need_balance && !IS_NOQUOTA(inode) &&
3354 has_not_enough_free_secs(sbi, 0, 0)) {
2a340760 3355 unlock_page(page);
2c4db1a6 3356 f2fs_balance_fs(sbi, true);
2a340760
JK		 3357 lock_page(page);
3358 if (page->mapping != mapping) {
3359 /* The page got truncated from under us */
3360 f2fs_put_page(page, 1);
3361 goto repeat;
3362 }
3363 }
3364
bae0ee7a 3365 f2fs_wait_on_page_writeback(page, DATA, false, true);
b3d208f9 3366
649d7df2
JK		 3367 if (len == PAGE_SIZE || PageUptodate(page))
3368 return 0;
eb47b800 3369
95ae251f
EB		 3370 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3371 !f2fs_verity_in_progress(inode)) {
746e2403
YH		 3372 zero_user_segment(page, len, PAGE_SIZE);
3373 return 0;
3374 }
3375
2aadac08 3376 if (blkaddr == NEW_ADDR) {
09cbfeaf 3377 zero_user_segment(page, 0, PAGE_SIZE);
649d7df2 3378 SetPageUptodate(page);
eb47b800 3379 } else {
93770ab7
CY		 3380 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3381 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 3382 err = -EFSCORRUPTED;
93770ab7
CY		 3383 goto fail;
3384 }
0683728a 3385 err = f2fs_submit_page_read(inode, page, blkaddr, true);
13ba41e3 3386 if (err)
78682f79 3387 goto fail;
d54c795b 3388
393ff91f 3389 lock_page(page);
6bacf52f 3390 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 3391 f2fs_put_page(page, 1);
3392 goto repeat;
eb47b800 3393 }
1563ac75
CY		 3394 if (unlikely(!PageUptodate(page))) {
3395 err = -EIO;
3396 goto fail;
4375a336 3397 }
eb47b800 3398 }
eb47b800 3399 return 0;
9ba69cf9 3400
3aab8f82 3401fail:
86531d6b 3402 f2fs_put_page(page, 1);
3aab8f82 3403 f2fs_write_failed(mapping, pos + len);
a2e2e76b 3404 if (drop_atomic)
4d57b86d 3405 f2fs_drop_inmem_pages_all(sbi, false);
3aab8f82 3406 return err;
eb47b800
JK		 3407}
3408
a1dd3c13
JK		 3409static int f2fs_write_end(struct file *file,
3410 struct address_space *mapping,
3411 loff_t pos, unsigned len, unsigned copied,
3412 struct page *page, void *fsdata)
3413{
3414 struct inode *inode = page->mapping->host;
3415
dfb2bf38
CY		 3416 trace_f2fs_write_end(inode, pos, len, copied);
3417
649d7df2
JK		 3418 /*
3419 * This should be come from len == PAGE_SIZE, and we expect copied
3420 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
3421 * let generic_perform_write() try to copy data again through copied=0.
3422 */
3423 if (!PageUptodate(page)) {
746e2403 3424 if (unlikely(copied != len))
649d7df2
JK		 3425 copied = 0;
3426 else
3427 SetPageUptodate(page);
3428 }
4c8ff709
CY		 3429
3430#ifdef CONFIG_F2FS_FS_COMPRESSION
3431 /* overwrite compressed file */
3432 if (f2fs_compressed_file(inode) && fsdata) {
3433 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3434 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3435 return copied;
3436 }
3437#endif
3438
649d7df2
JK		 3439 if (!copied)
3440 goto unlock_out;
3441
34ba94ba 3442 set_page_dirty(page);
a1dd3c13 3443
95ae251f
EB		 3444 if (pos + copied > i_size_read(inode) &&
3445 !f2fs_verity_in_progress(inode))
fc9581c8 3446 f2fs_i_size_write(inode, pos + copied);
649d7df2 3447unlock_out:
3024c9a1 3448 f2fs_put_page(page, 1);
d0239e1b 3449 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
a1dd3c13
JK		 3450 return copied;
3451}
3452
6f673763
OS		 3453static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
3454 loff_t offset)
944fcfc1 3455{
8a56dd96
JK		 3456 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
3457 unsigned blkbits = i_blkbits;
3458 unsigned blocksize_mask = (1 << blkbits) - 1;
3459 unsigned long align = offset | iov_iter_alignment(iter);
3460 struct block_device *bdev = inode->i_sb->s_bdev;
3461
3462 if (align & blocksize_mask) {
3463 if (bdev)
3464 blkbits = blksize_bits(bdev_logical_block_size(bdev));
3465 blocksize_mask = (1 << blkbits) - 1;
3466 if (align & blocksize_mask)
3467 return -EINVAL;
3468 return 1;
3469 }
944fcfc1
JK		 3470 return 0;
3471}
3472
02b16d0a
CY		 3473static void f2fs_dio_end_io(struct bio *bio)
3474{
3475 struct f2fs_private_dio *dio = bio->bi_private;
3476
3477 dec_page_count(F2FS_I_SB(dio->inode),
3478 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3479
3480 bio->bi_private = dio->orig_private;
3481 bio->bi_end_io = dio->orig_end_io;
3482
5222595d 3483 kvfree(dio);
02b16d0a
CY		 3484
3485 bio_endio(bio);
3486}
3487
3488static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
3489 loff_t file_offset)
3490{
3491 struct f2fs_private_dio *dio;
3492 bool write = (bio_op(bio) == REQ_OP_WRITE);
02b16d0a
CY		 3493
3494 dio = f2fs_kzalloc(F2FS_I_SB(inode),
3495 sizeof(struct f2fs_private_dio), GFP_NOFS);
8e114038 3496 if (!dio)
02b16d0a 3497 goto out;
02b16d0a
CY		 3498
3499 dio->inode = inode;
3500 dio->orig_end_io = bio->bi_end_io;
3501 dio->orig_private = bio->bi_private;
3502 dio->write = write;
3503
3504 bio->bi_end_io = f2fs_dio_end_io;
3505 bio->bi_private = dio;
3506
3507 inc_page_count(F2FS_I_SB(inode),
3508 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3509
3510 submit_bio(bio);
3511 return;
3512out:
3513 bio->bi_status = BLK_STS_IOERR;
3514 bio_endio(bio);
3515}
3516
c8b8e32d 3517static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
eb47b800 3518{
b439b103 3519 struct address_space *mapping = iocb->ki_filp->f_mapping;
3aab8f82 3520 struct inode *inode = mapping->host;
0cdd3195 3521 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f847c699 3522 struct f2fs_inode_info *fi = F2FS_I(inode);
3aab8f82 3523 size_t count = iov_iter_count(iter);
c8b8e32d 3524 loff_t offset = iocb->ki_pos;
82e0a5aa 3525 int rw = iov_iter_rw(iter);
3aab8f82 3526 int err;
0cdd3195 3527 enum rw_hint hint = iocb->ki_hint;
63189b78 3528 int whint_mode = F2FS_OPTION(sbi).whint_mode;
f847c699 3529 bool do_opu;
944fcfc1 3530
b439b103 3531 err = check_direct_IO(inode, iter, offset);
b9d777b8 3532 if (err)
8a56dd96 3533 return err < 0 ? err : 0;
9ffe0fb5 3534
f847c699 3535 if (f2fs_force_buffered_io(inode, iocb, iter))
36abef4e 3536 return 0;
fcc85a4d 3537
f847c699
CY		 3538 do_opu = allow_outplace_dio(inode, iocb, iter);
3539
5302fb00 3540 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
70407fad 3541
0cdd3195
HL		 3542 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
3543 iocb->ki_hint = WRITE_LIFE_NOT_SET;
3544
f847c699
CY		 3545 if (iocb->ki_flags & IOCB_NOWAIT) {
3546 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
3547 iocb->ki_hint = hint;
3548 err = -EAGAIN;
3549 goto out;
3550 }
3551 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
3552 up_read(&fi->i_gc_rwsem[rw]);
b91050a8
HL		 3553 iocb->ki_hint = hint;
3554 err = -EAGAIN;
3555 goto out;
3556 }
f847c699
CY		 3557 } else {
3558 down_read(&fi->i_gc_rwsem[rw]);
3559 if (do_opu)
3560 down_read(&fi->i_gc_rwsem[READ]);
b91050a8
HL		 3561 }
3562
02b16d0a 3563 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
f9d6d059
CY		 3564 iter, rw == WRITE ? get_data_block_dio_write :
3565 get_data_block_dio, NULL, f2fs_dio_submit_bio,
ad8d6a02
D		 3566 rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
3567 DIO_SKIP_HOLES);
f847c699
CY		 3568
3569 if (do_opu)
3570 up_read(&fi->i_gc_rwsem[READ]);
3571
3572 up_read(&fi->i_gc_rwsem[rw]);
82e0a5aa
CY		 3573
3574 if (rw == WRITE) {
0cdd3195
HL		 3575 if (whint_mode == WHINT_MODE_OFF)
3576 iocb->ki_hint = hint;
b0af6d49
CY		 3577 if (err > 0) {
3578 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3579 err);
f847c699
CY		 3580 if (!do_opu)
3581 set_inode_flag(inode, FI_UPDATE_WRITE);
b0af6d49 3582 } else if (err < 0) {
6bfc4919 3583 f2fs_write_failed(mapping, offset + count);
b0af6d49 3584 }
8b83ac81
CY		 3585 } else {
3586 if (err > 0)
3587 f2fs_update_iostat(sbi, APP_DIRECT_READ_IO, err);
6bfc4919 3588 }
70407fad 3589
b91050a8 3590out:
5302fb00 3591 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
70407fad 3592
3aab8f82 3593 return err;
eb47b800
JK		 3594}
3595
487261f3
CY		 3596void f2fs_invalidate_page(struct page *page, unsigned int offset,
3597 unsigned int length)
eb47b800
JK		 3598{
3599 struct inode *inode = page->mapping->host;
487261f3 3600 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
a7ffdbe2 3601
487261f3 3602 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
09cbfeaf 3603 (offset % PAGE_SIZE || length != PAGE_SIZE))
a7ffdbe2
JK		 3604 return;
3605
487261f3 3606 if (PageDirty(page)) {
933439c8 3607 if (inode->i_ino == F2FS_META_INO(sbi)) {
487261f3 3608 dec_page_count(sbi, F2FS_DIRTY_META);
933439c8 3609 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
487261f3 3610 dec_page_count(sbi, F2FS_DIRTY_NODES);
933439c8 3611 } else {
487261f3 3612 inode_dec_dirty_pages(inode);
4d57b86d 3613 f2fs_remove_dirty_inode(inode);
933439c8 3614 }
487261f3 3615 }
decd36b6 3616
2baf0781
CY		 3617 clear_cold_data(page);
3618
decd36b6 3619 if (IS_ATOMIC_WRITTEN_PAGE(page))
4d57b86d 3620 return f2fs_drop_inmem_page(inode, page);
decd36b6 3621
240a5915 3622 f2fs_clear_page_private(page);
eb47b800
JK		 3623}
3624
487261f3 3625int f2fs_release_page(struct page *page, gfp_t wait)
eb47b800 3626{
f68daeeb
JK		 3627 /* If this is dirty page, keep PagePrivate */
3628 if (PageDirty(page))
3629 return 0;
3630
decd36b6
CY		 3631 /* This is atomic written page, keep Private */
3632 if (IS_ATOMIC_WRITTEN_PAGE(page))
3633 return 0;
3634
2baf0781 3635 clear_cold_data(page);
240a5915 3636 f2fs_clear_page_private(page);
c3850aa1 3637 return 1;
eb47b800
JK		 3638}
3639
3640static int f2fs_set_data_page_dirty(struct page *page)
3641{
4969c06a 3642 struct inode *inode = page_file_mapping(page)->host;
eb47b800 3643
26c6b887
JK		 3644 trace_f2fs_set_page_dirty(page, DATA);
3645
237c0790
JK		 3646 if (!PageUptodate(page))
3647 SetPageUptodate(page);
4969c06a
JK		 3648 if (PageSwapCache(page))
3649 return __set_page_dirty_nobuffers(page);
34ba94ba 3650
5fe45743 3651 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
decd36b6 3652 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
4d57b86d 3653 f2fs_register_inmem_page(inode, page);
decd36b6
CY		 3654 return 1;
3655 }
3656 /*
3657 * Previously, this page has been registered, we just
3658 * return here.
3659 */
3660 return 0;
34ba94ba
JK		 3661 }
3662
eb47b800 3663 if (!PageDirty(page)) {
b87078ad 3664 __set_page_dirty_nobuffers(page);
4d57b86d 3665 f2fs_update_dirty_page(inode, page);
eb47b800
JK		 3666 return 1;
3667 }
3668 return 0;
3669}
3670
c1c63387
CY		 3671
3672static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block)
3673{
3674#ifdef CONFIG_F2FS_FS_COMPRESSION
3675 struct dnode_of_data dn;
3676 sector_t start_idx, blknr = 0;
3677 int ret;
3678
3679 start_idx = round_down(block, F2FS_I(inode)->i_cluster_size);
3680
3681 set_new_dnode(&dn, inode, NULL, NULL, 0);
3682 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
3683 if (ret)
3684 return 0;
3685
3686 if (dn.data_blkaddr != COMPRESS_ADDR) {
3687 dn.ofs_in_node += block - start_idx;
3688 blknr = f2fs_data_blkaddr(&dn);
3689 if (!__is_valid_data_blkaddr(blknr))
3690 blknr = 0;
3691 }
3692
3693 f2fs_put_dnode(&dn);
3694
3695 return blknr;
3696#else
3697 return -EOPNOTSUPP;
3698#endif
3699}
3700
3701
c01e54b7
JK		 3702static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3703{
454ae7e5
CY		 3704 struct inode *inode = mapping->host;
3705
1d373a0e
JK		 3706 if (f2fs_has_inline_data(inode))
3707 return 0;
3708
3709 /* make sure allocating whole blocks */
3710 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3711 filemap_write_and_wait(mapping);
3712
c1c63387
CY		 3713 if (f2fs_compressed_file(inode))
3714 return f2fs_bmap_compress(inode, block);
3715
e2b4e2bc 3716 return generic_block_bmap(mapping, block, get_data_block_bmap);
429511cd
CY		 3717}
3718
5b7a487c
WG		 3719#ifdef CONFIG_MIGRATION
3720#include <linux/migrate.h>
3721
3722int f2fs_migrate_page(struct address_space *mapping,
3723 struct page *newpage, struct page *page, enum migrate_mode mode)
3724{
3725 int rc, extra_count;
3726 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3727 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
3728
3729 BUG_ON(PageWriteback(page));
3730
3731 /* migrating an atomic written page is safe with the inmem_lock hold */
ff1048e7
JK		 3732 if (atomic_written) {
3733 if (mode != MIGRATE_SYNC)
3734 return -EBUSY;
3735 if (!mutex_trylock(&fi->inmem_lock))
3736 return -EAGAIN;
3737 }
5b7a487c 3738
240a5915
CY		 3739 /* one extra reference was held for atomic_write page */
3740 extra_count = atomic_written ? 1 : 0;
5b7a487c 3741 rc = migrate_page_move_mapping(mapping, newpage,
37109694 3742 page, extra_count);
5b7a487c
WG		 3743 if (rc != MIGRATEPAGE_SUCCESS) {
3744 if (atomic_written)
3745 mutex_unlock(&fi->inmem_lock);
3746 return rc;
3747 }
3748
3749 if (atomic_written) {
3750 struct inmem_pages *cur;
3751 list_for_each_entry(cur, &fi->inmem_pages, list)
3752 if (cur->page == page) {
3753 cur->page = newpage;
3754 break;
3755 }
3756 mutex_unlock(&fi->inmem_lock);
3757 put_page(page);
3758 get_page(newpage);
3759 }
3760
240a5915
CY		 3761 if (PagePrivate(page)) {
3762 f2fs_set_page_private(newpage, page_private(page));
3763 f2fs_clear_page_private(page);
3764 }
5b7a487c 3765
2916ecc0
JG		 3766 if (mode != MIGRATE_SYNC_NO_COPY)
3767 migrate_page_copy(newpage, page);
3768 else
3769 migrate_page_states(newpage, page);
5b7a487c
WG		 3770
3771 return MIGRATEPAGE_SUCCESS;
3772}
3773#endif
3774
4969c06a
JK		 3775#ifdef CONFIG_SWAP
3776/* Copied from generic_swapfile_activate() to check any holes */
3e5e479a
CY		 3777static int check_swap_activate(struct swap_info_struct *sis,
3778 struct file *swap_file, sector_t *span)
4969c06a
JK		 3779{
3780 struct address_space *mapping = swap_file->f_mapping;
3781 struct inode *inode = mapping->host;
3782 unsigned blocks_per_page;
3783 unsigned long page_no;
3784 unsigned blkbits;
3785 sector_t probe_block;
3786 sector_t last_block;
3787 sector_t lowest_block = -1;
3788 sector_t highest_block = 0;
3e5e479a
CY		 3789 int nr_extents = 0;
3790 int ret;
4969c06a
JK		 3791
3792 blkbits = inode->i_blkbits;
3793 blocks_per_page = PAGE_SIZE >> blkbits;
3794
3795 /*
3796 * Map all the blocks into the extent list. This code doesn't try
3797 * to be very smart.
3798 */
3799 probe_block = 0;
3800 page_no = 0;
3801 last_block = i_size_read(inode) >> blkbits;
3e5e479a
CY		 3802 while ((probe_block + blocks_per_page) <= last_block &&
3803 page_no < sis->max) {
4969c06a
JK		 3804 unsigned block_in_page;
3805 sector_t first_block;
30460e1e
CM		 3806 sector_t block = 0;
3807 int err = 0;
4969c06a
JK		 3808
3809 cond_resched();
3810
30460e1e
CM		 3811 block = probe_block;
3812 err = bmap(inode, &block);
3813 if (err || !block)
4969c06a 3814 goto bad_bmap;
30460e1e 3815 first_block = block;
4969c06a
JK		 3816
3817 /*
3818 * It must be PAGE_SIZE aligned on-disk
3819 */
3820 if (first_block & (blocks_per_page - 1)) {
3821 probe_block++;
3822 goto reprobe;
3823 }
3824
3825 for (block_in_page = 1; block_in_page < blocks_per_page;
3826 block_in_page++) {
4969c06a 3827
30460e1e
CM		 3828 block = probe_block + block_in_page;
3829 err = bmap(inode, &block);
3830
3831 if (err || !block)
4969c06a 3832 goto bad_bmap;
30460e1e 3833
4969c06a
JK		 3834 if (block != first_block + block_in_page) {
3835 /* Discontiguity */
3836 probe_block++;
3837 goto reprobe;
3838 }
3839 }
3840
3841 first_block >>= (PAGE_SHIFT - blkbits);
3842 if (page_no) { /* exclude the header page */
3843 if (first_block < lowest_block)
3844 lowest_block = first_block;
3845 if (first_block > highest_block)
3846 highest_block = first_block;
3847 }
3848
3e5e479a
CY		 3849 /*
3850 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3851 */
3852 ret = add_swap_extent(sis, page_no, 1, first_block);
3853 if (ret < 0)
3854 goto out;
3855 nr_extents += ret;
4969c06a
JK		 3856 page_no++;
3857 probe_block += blocks_per_page;
3858reprobe:
3859 continue;
3860 }
3e5e479a
CY		 3861 ret = nr_extents;
3862 *span = 1 + highest_block - lowest_block;
3863 if (page_no == 0)
3864 page_no = 1; /* force Empty message */
3865 sis->max = page_no;
3866 sis->pages = page_no - 1;
3867 sis->highest_bit = page_no - 1;
3868out:
3869 return ret;
4969c06a
JK		 3870bad_bmap:
3871 pr_err("swapon: swapfile has holes\n");
3872 return -EINVAL;
3873}
3874
3875static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3876 sector_t *span)
3877{
3878 struct inode *inode = file_inode(file);
3879 int ret;
3880
3881 if (!S_ISREG(inode->i_mode))
3882 return -EINVAL;
3883
3884 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3885 return -EROFS;
3886
3887 ret = f2fs_convert_inline_inode(inode);
3888 if (ret)
3889 return ret;
3890
4c8ff709
CY		 3891 if (f2fs_disable_compressed_file(inode))
3892 return -EINVAL;
3893
3e5e479a
CY		 3894 ret = check_swap_activate(sis, file, span);
3895 if (ret < 0)
4969c06a
JK		 3896 return ret;
3897
3898 set_inode_flag(inode, FI_PIN_FILE);
3899 f2fs_precache_extents(inode);
3900 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3e5e479a 3901 return ret;
4969c06a
JK		 3902}
3903
3904static void f2fs_swap_deactivate(struct file *file)
3905{
3906 struct inode *inode = file_inode(file);
3907
3908 clear_inode_flag(inode, FI_PIN_FILE);
3909}
3910#else
3911static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3912 sector_t *span)
3913{
3914 return -EOPNOTSUPP;
3915}
3916
3917static void f2fs_swap_deactivate(struct file *file)
3918{
3919}
3920#endif
3921
eb47b800
JK		 3922const struct address_space_operations f2fs_dblock_aops = {
3923 .readpage = f2fs_read_data_page,
23323196 3924 .readahead = f2fs_readahead,
eb47b800
JK		 3925 .writepage = f2fs_write_data_page,
3926 .writepages = f2fs_write_data_pages,
3927 .write_begin = f2fs_write_begin,
a1dd3c13 3928 .write_end = f2fs_write_end,
eb47b800 3929 .set_page_dirty = f2fs_set_data_page_dirty,
487261f3
CY		 3930 .invalidatepage = f2fs_invalidate_page,
3931 .releasepage = f2fs_release_page,
eb47b800 3932 .direct_IO = f2fs_direct_IO,
c01e54b7 3933 .bmap = f2fs_bmap,
4969c06a
JK		 3934 .swap_activate = f2fs_swap_activate,
3935 .swap_deactivate = f2fs_swap_deactivate,
5b7a487c
WG		 3936#ifdef CONFIG_MIGRATION
3937 .migratepage = f2fs_migrate_page,
3938#endif
eb47b800 3939};
6dbb1796 3940
5ec2d99d 3941void f2fs_clear_page_cache_dirty_tag(struct page *page)
aec2f729
CY		 3942{
3943 struct address_space *mapping = page_mapping(page);
3944 unsigned long flags;
3945
3946 xa_lock_irqsave(&mapping->i_pages, flags);
5ec2d99d 3947 __xa_clear_mark(&mapping->i_pages, page_index(page),
aec2f729
CY		 3948 PAGECACHE_TAG_DIRTY);
3949 xa_unlock_irqrestore(&mapping->i_pages, flags);
3950}
3951
6dbb1796
EB		 3952int __init f2fs_init_post_read_processing(void)
3953{
95ae251f
EB		 3954 bio_post_read_ctx_cache =
3955 kmem_cache_create("f2fs_bio_post_read_ctx",
3956 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
6dbb1796
EB		 3957 if (!bio_post_read_ctx_cache)
3958 goto fail;
3959 bio_post_read_ctx_pool =
3960 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3961 bio_post_read_ctx_cache);
3962 if (!bio_post_read_ctx_pool)
3963 goto fail_free_cache;
3964 return 0;
3965
3966fail_free_cache:
3967 kmem_cache_destroy(bio_post_read_ctx_cache);
3968fail:
3969 return -ENOMEM;
3970}
3971
0b20fcec 3972void f2fs_destroy_post_read_processing(void)
6dbb1796
EB		 3973{
3974 mempool_destroy(bio_post_read_ctx_pool);
3975 kmem_cache_destroy(bio_post_read_ctx_cache);
3976}
0b20fcec 3977
4c8ff709
CY		 3978int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
3979{
3980 if (!f2fs_sb_has_encrypt(sbi) &&
3981 !f2fs_sb_has_verity(sbi) &&
3982 !f2fs_sb_has_compression(sbi))
3983 return 0;
3984
3985 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
3986 WQ_UNBOUND | WQ_HIGHPRI,
3987 num_online_cpus());
3988 if (!sbi->post_read_wq)
3989 return -ENOMEM;
3990 return 0;
3991}
3992
3993void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
3994{
3995 if (sbi->post_read_wq)
3996 destroy_workqueue(sbi->post_read_wq);
3997}
3998
0b20fcec
CY		 3999int __init f2fs_init_bio_entry_cache(void)
4000{
98510003 4001 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
0b20fcec
CY		 4002 sizeof(struct bio_entry));
4003 if (!bio_entry_slab)
4004 return -ENOMEM;
4005 return 0;
4006}
4007
f543805f 4008void f2fs_destroy_bio_entry_cache(void)
0b20fcec
CY		 4009{
4010 kmem_cache_destroy(bio_entry_slab);
4011}
Michael's Linux tree.