projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
f2fs: free sysfs kobject
[linux-2.6-block.git] / fs / f2fs / data.c
CommitLineData
7c1a000d 1// SPDX-License-Identifier: GPL-2.0
0a8165d7 2/*
eb47b800
JK		 3 * fs/f2fs/data.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
eb47b800
JK		 7 */
8#include <linux/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/buffer_head.h>
11#include <linux/mpage.h>
12#include <linux/writeback.h>
13#include <linux/backing-dev.h>
8f46dcae 14#include <linux/pagevec.h>
eb47b800
JK		 15#include <linux/blkdev.h>
16#include <linux/bio.h>
4969c06a 17#include <linux/swap.h>
690e4a3e 18#include <linux/prefetch.h>
e2e40f2c 19#include <linux/uio.h>
f1e88660 20#include <linux/cleancache.h>
174cd4b1 21#include <linux/sched/signal.h>
eb47b800
JK		 22
23#include "f2fs.h"
24#include "node.h"
25#include "segment.h"
db9f7c1a 26#include "trace.h"
848753aa 27#include <trace/events/f2fs.h>
eb47b800 28
6dbb1796
EB		 29#define NUM_PREALLOC_POST_READ_CTXS 128
30
31static struct kmem_cache *bio_post_read_ctx_cache;
0b20fcec 32static struct kmem_cache *bio_entry_slab;
6dbb1796 33static mempool_t *bio_post_read_ctx_pool;
f543805f
CY		 34static struct bio_set f2fs_bioset;
35
36#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
37
38int __init f2fs_init_bioset(void)
39{
40 if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
41 0, BIOSET_NEED_BVECS))
42 return -ENOMEM;
43 return 0;
44}
45
46void f2fs_destroy_bioset(void)
47{
48 bioset_exit(&f2fs_bioset);
49}
50
51static inline struct bio *__f2fs_bio_alloc(gfp_t gfp_mask,
52 unsigned int nr_iovecs)
53{
54 return bio_alloc_bioset(gfp_mask, nr_iovecs, &f2fs_bioset);
55}
56
57struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi, int npages, bool no_fail)
58{
59 struct bio *bio;
60
61 if (no_fail) {
62 /* No failure on bio allocation */
63 bio = __f2fs_bio_alloc(GFP_NOIO, npages);
64 if (!bio)
65 bio = __f2fs_bio_alloc(GFP_NOIO | __GFP_NOFAIL, npages);
66 return bio;
67 }
68 if (time_to_inject(sbi, FAULT_ALLOC_BIO)) {
69 f2fs_show_injection_info(sbi, FAULT_ALLOC_BIO);
70 return NULL;
71 }
72
73 return __f2fs_bio_alloc(GFP_KERNEL, npages);
74}
6dbb1796 75
36951b38
CY		 76static bool __is_cp_guaranteed(struct page *page)
77{
78 struct address_space *mapping = page->mapping;
79 struct inode *inode;
80 struct f2fs_sb_info *sbi;
81
82 if (!mapping)
83 return false;
84
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 {
117 STEP_INITIAL = 0,
118 STEP_DECRYPT,
95ae251f 119 STEP_VERITY,
6dbb1796
EB		 120};
121
122struct bio_post_read_ctx {
123 struct bio *bio;
124 struct work_struct work;
125 unsigned int cur_step;
126 unsigned int enabled_steps;
127};
128
129static void __read_end_io(struct bio *bio)
93dfe2ac 130{
6dbb1796
EB		 131 struct page *page;
132 struct bio_vec *bv;
6dc4f100 133 struct bvec_iter_all iter_all;
93dfe2ac 134
2b070cfe 135 bio_for_each_segment_all(bv, bio, iter_all) {
6dbb1796
EB		 136 page = bv->bv_page;
137
138 /* PG_error was set if any post_read step failed */
139 if (bio->bi_status || PageError(page)) {
140 ClearPageUptodate(page);
fb7d70db
JK		 141 /* will re-read again later */
142 ClearPageError(page);
6dbb1796
EB		 143 } else {
144 SetPageUptodate(page);
145 }
5f9abab4 146 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
6dbb1796
EB		 147 unlock_page(page);
148 }
149 if (bio->bi_private)
150 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
151 bio_put(bio);
152}
153
154static void bio_post_read_processing(struct bio_post_read_ctx *ctx);
155
156static void decrypt_work(struct work_struct *work)
157{
158 struct bio_post_read_ctx *ctx =
159 container_of(work, struct bio_post_read_ctx, work);
160
161 fscrypt_decrypt_bio(ctx->bio);
162
163 bio_post_read_processing(ctx);
164}
165
95ae251f
EB		 166static void verity_work(struct work_struct *work)
167{
168 struct bio_post_read_ctx *ctx =
169 container_of(work, struct bio_post_read_ctx, work);
170
171 fsverity_verify_bio(ctx->bio);
172
173 bio_post_read_processing(ctx);
174}
175
6dbb1796
EB		 176static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
177{
95ae251f
EB		 178 /*
179 * We use different work queues for decryption and for verity because
180 * verity may require reading metadata pages that need decryption, and
181 * we shouldn't recurse to the same workqueue.
182 */
6dbb1796
EB		 183 switch (++ctx->cur_step) {
184 case STEP_DECRYPT:
185 if (ctx->enabled_steps & (1 << STEP_DECRYPT)) {
186 INIT_WORK(&ctx->work, decrypt_work);
187 fscrypt_enqueue_decrypt_work(&ctx->work);
188 return;
189 }
190 ctx->cur_step++;
191 /* fall-through */
95ae251f
EB		 192 case STEP_VERITY:
193 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
194 INIT_WORK(&ctx->work, verity_work);
195 fsverity_enqueue_verify_work(&ctx->work);
196 return;
197 }
198 ctx->cur_step++;
199 /* fall-through */
6dbb1796
EB		 200 default:
201 __read_end_io(ctx->bio);
202 }
203}
204
205static bool f2fs_bio_post_read_required(struct bio *bio)
206{
207 return bio->bi_private && !bio->bi_status;
208}
209
210static void f2fs_read_end_io(struct bio *bio)
211{
c45d6002
CY		 212 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
213
214 if (time_to_inject(sbi, FAULT_READ_IO)) {
215 f2fs_show_injection_info(sbi, FAULT_READ_IO);
4e4cbee9 216 bio->bi_status = BLK_STS_IOERR;
55523519 217 }
8b038c70 218
6dbb1796
EB		 219 if (f2fs_bio_post_read_required(bio)) {
220 struct bio_post_read_ctx *ctx = bio->bi_private;
f1e88660 221
6dbb1796
EB		 222 ctx->cur_step = STEP_INITIAL;
223 bio_post_read_processing(ctx);
224 return;
f1e88660 225 }
6dbb1796
EB		 226
227 __read_end_io(bio);
f1e88660
JK		 228}
229
4246a0b6 230static void f2fs_write_end_io(struct bio *bio)
93dfe2ac 231{
1b1f559f 232 struct f2fs_sb_info *sbi = bio->bi_private;
f568849e 233 struct bio_vec *bvec;
6dc4f100 234 struct bvec_iter_all iter_all;
93dfe2ac 235
6f5c2ed0 236 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
c45d6002 237 f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
6f5c2ed0
CY		 238 bio->bi_status = BLK_STS_IOERR;
239 }
240
2b070cfe 241 bio_for_each_segment_all(bvec, bio, iter_all) {
93dfe2ac 242 struct page *page = bvec->bv_page;
36951b38 243 enum count_type type = WB_DATA_TYPE(page);
93dfe2ac 244
0a595eba
JK		 245 if (IS_DUMMY_WRITTEN_PAGE(page)) {
246 set_page_private(page, (unsigned long)NULL);
247 ClearPagePrivate(page);
248 unlock_page(page);
249 mempool_free(page, sbi->write_io_dummy);
250
4e4cbee9 251 if (unlikely(bio->bi_status))
0a595eba
JK		 252 f2fs_stop_checkpoint(sbi, true);
253 continue;
254 }
255
d2d0727b 256 fscrypt_finalize_bounce_page(&page);
4375a336 257
4e4cbee9 258 if (unlikely(bio->bi_status)) {
5114a97a 259 mapping_set_error(page->mapping, -EIO);
b1ca321d
JK		 260 if (type == F2FS_WB_CP_DATA)
261 f2fs_stop_checkpoint(sbi, true);
93dfe2ac 262 }
7dff55d2
YH		 263
264 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
265 page->index != nid_of_node(page));
266
36951b38 267 dec_page_count(sbi, type);
50fa53ec
CY		 268 if (f2fs_in_warm_node_list(sbi, page))
269 f2fs_del_fsync_node_entry(sbi, page);
36951b38 270 clear_cold_data(page);
93dfe2ac 271 end_page_writeback(page);
f568849e 272 }
36951b38 273 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
f5730184 274 wq_has_sleeper(&sbi->cp_wait))
93dfe2ac
JK		 275 wake_up(&sbi->cp_wait);
276
277 bio_put(bio);
278}
279
3c62be17
JK		 280/*
281 * Return true, if pre_bio's bdev is same as its target device.
282 */
283struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
284 block_t blk_addr, struct bio *bio)
285{
286 struct block_device *bdev = sbi->sb->s_bdev;
287 int i;
288
0916878d
DLM		 289 if (f2fs_is_multi_device(sbi)) {
290 for (i = 0; i < sbi->s_ndevs; i++) {
291 if (FDEV(i).start_blk <= blk_addr &&
292 FDEV(i).end_blk >= blk_addr) {
293 blk_addr -= FDEV(i).start_blk;
294 bdev = FDEV(i).bdev;
295 break;
296 }
3c62be17
JK		 297 }
298 }
299 if (bio) {
74d46992 300 bio_set_dev(bio, bdev);
3c62be17
JK		 301 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
302 }
303 return bdev;
304}
305
306int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
307{
308 int i;
309
0916878d
DLM		 310 if (!f2fs_is_multi_device(sbi))
311 return 0;
312
3c62be17
JK		 313 for (i = 0; i < sbi->s_ndevs; i++)
314 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
315 return i;
316 return 0;
317}
318
319static bool __same_bdev(struct f2fs_sb_info *sbi,
320 block_t blk_addr, struct bio *bio)
321{
74d46992
CH		 322 struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
323 return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
3c62be17
JK		 324}
325
940a6d34
GZ		 326/*
327 * Low-level block read/write IO operations.
328 */
b757f6ed 329static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
940a6d34 330{
b757f6ed 331 struct f2fs_sb_info *sbi = fio->sbi;
940a6d34
GZ		 332 struct bio *bio;
333
d62fe971 334 bio = f2fs_bio_alloc(sbi, npages, true);
940a6d34 335
b757f6ed
CY		 336 f2fs_target_device(sbi, fio->new_blkaddr, bio);
337 if (is_read_io(fio->op)) {
0cdd3195
HL		 338 bio->bi_end_io = f2fs_read_end_io;
339 bio->bi_private = NULL;
340 } else {
341 bio->bi_end_io = f2fs_write_end_io;
342 bio->bi_private = sbi;
b757f6ed
CY		 343 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
344 fio->type, fio->temp);
0cdd3195 345 }
b757f6ed
CY		 346 if (fio->io_wbc)
347 wbc_init_bio(fio->io_wbc, bio);
940a6d34
GZ		 348
349 return bio;
350}
351
4fc29c1a
LT		 352static inline void __submit_bio(struct f2fs_sb_info *sbi,
353 struct bio *bio, enum page_type type)
f5730184 354{
4fc29c1a 355 if (!is_read_io(bio_op(bio))) {
0a595eba
JK		 356 unsigned int start;
357
0a595eba
JK		 358 if (type != DATA && type != NODE)
359 goto submit_io;
360
66415cee 361 if (test_opt(sbi, LFS) && current->plug)
3bb09a0e
TY		 362 blk_finish_plug(current->plug);
363
8223ecc4
CY		 364 if (F2FS_IO_ALIGNED(sbi))
365 goto submit_io;
366
0a595eba
JK		 367 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
368 start %= F2FS_IO_SIZE(sbi);
369
370 if (start == 0)
371 goto submit_io;
372
373 /* fill dummy pages */
374 for (; start < F2FS_IO_SIZE(sbi); start++) {
375 struct page *page =
376 mempool_alloc(sbi->write_io_dummy,
bc73a4b2 377 GFP_NOIO | __GFP_NOFAIL);
0a595eba
JK		 378 f2fs_bug_on(sbi, !page);
379
bc73a4b2 380 zero_user_segment(page, 0, PAGE_SIZE);
0a595eba
JK		 381 SetPagePrivate(page);
382 set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
383 lock_page(page);
384 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
385 f2fs_bug_on(sbi, 1);
386 }
387 /*
388 * In the NODE case, we lose next block address chain. So, we
389 * need to do checkpoint in f2fs_sync_file.
390 */
391 if (type == NODE)
392 set_sbi_flag(sbi, SBI_NEED_CP);
19a5f5e2 393 }
0a595eba 394submit_io:
554b5125
JK		 395 if (is_read_io(bio_op(bio)))
396 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
397 else
398 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
4e49ea4a 399 submit_bio(bio);
f5730184
JK		 400}
401
458e6197 402static void __submit_merged_bio(struct f2fs_bio_info *io)
93dfe2ac 403{
458e6197 404 struct f2fs_io_info *fio = &io->fio;
93dfe2ac
JK		 405
406 if (!io->bio)
407 return;
408
554b5125
JK		 409 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
410
04d328de 411 if (is_read_io(fio->op))
554b5125 412 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
6a8f8ca5 413 else
554b5125 414 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
04d328de 415
4fc29c1a 416 __submit_bio(io->sbi, io->bio, fio->type);
93dfe2ac
JK		 417 io->bio = NULL;
418}
419
8648de2c 420static bool __has_merged_page(struct bio *bio, struct inode *inode,
bab475c5 421 struct page *page, nid_t ino)
0fd785eb 422{
0fd785eb
CY		 423 struct bio_vec *bvec;
424 struct page *target;
6dc4f100 425 struct bvec_iter_all iter_all;
0fd785eb 426
8648de2c 427 if (!bio)
0fd785eb 428 return false;
0c3a5797 429
bab475c5 430 if (!inode && !page && !ino)
0c3a5797 431 return true;
0fd785eb 432
8648de2c 433 bio_for_each_segment_all(bvec, bio, iter_all) {
0fd785eb 434
d2d0727b
EB		 435 target = bvec->bv_page;
436 if (fscrypt_is_bounce_page(target))
437 target = fscrypt_pagecache_page(target);
0fd785eb 438
0c3a5797
CY		 439 if (inode && inode == target->mapping->host)
440 return true;
bab475c5
CY		 441 if (page && page == target)
442 return true;
0c3a5797 443 if (ino && ino == ino_of_node(target))
0fd785eb 444 return true;
0fd785eb
CY		 445 }
446
0fd785eb
CY		 447 return false;
448}
449
b9109b0e 450static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
a912b54d 451 enum page_type type, enum temp_type temp)
93dfe2ac
JK		 452{
453 enum page_type btype = PAGE_TYPE_OF_BIO(type);
a912b54d 454 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
93dfe2ac 455
df0f8dc0 456 down_write(&io->io_rwsem);
458e6197
JK		 457
458 /* change META to META_FLUSH in the checkpoint procedure */
459 if (type >= META_FLUSH) {
460 io->fio.type = META_FLUSH;
04d328de 461 io->fio.op = REQ_OP_WRITE;
3adc5fcb 462 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
70fd7614 463 if (!test_opt(sbi, NOBARRIER))
7f54f51f 464 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
458e6197
JK		 465 }
466 __submit_merged_bio(io);
df0f8dc0 467 up_write(&io->io_rwsem);
93dfe2ac
JK		 468}
469
a912b54d 470static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 471 struct inode *inode, struct page *page,
472 nid_t ino, enum page_type type, bool force)
0c3a5797 473{
a912b54d 474 enum temp_type temp;
1e771e83 475 bool ret = true;
a912b54d
JK		 476
477 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
1e771e83
YS		 478 if (!force) {
479 enum page_type btype = PAGE_TYPE_OF_BIO(type);
480 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
a912b54d 481
1e771e83 482 down_read(&io->io_rwsem);
8648de2c 483 ret = __has_merged_page(io->bio, inode, page, ino);
1e771e83
YS		 484 up_read(&io->io_rwsem);
485 }
486 if (ret)
487 __f2fs_submit_merged_write(sbi, type, temp);
a912b54d
JK		 488
489 /* TODO: use HOT temp only for meta pages now. */
490 if (type >= META)
491 break;
492 }
0c3a5797
CY		 493}
494
b9109b0e 495void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
0c3a5797 496{
adcc00f7 497 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
0c3a5797
CY		 498}
499
b9109b0e 500void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 501 struct inode *inode, struct page *page,
502 nid_t ino, enum page_type type)
0c3a5797 503{
bab475c5 504 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
0c3a5797
CY		 505}
506
b9109b0e 507void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
406657dd 508{
b9109b0e
JK		 509 f2fs_submit_merged_write(sbi, DATA);
510 f2fs_submit_merged_write(sbi, NODE);
511 f2fs_submit_merged_write(sbi, META);
406657dd
CY		 512}
513
93dfe2ac
JK		 514/*
515 * Fill the locked page with data located in the block address.
771a9a71 516 * A caller needs to unlock the page on failure.
93dfe2ac 517 */
05ca3632 518int f2fs_submit_page_bio(struct f2fs_io_info *fio)
93dfe2ac 519{
93dfe2ac 520 struct bio *bio;
0b81d077
JK		 521 struct page *page = fio->encrypted_page ?
522 fio->encrypted_page : fio->page;
93dfe2ac 523
c9b60788 524 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
93770ab7
CY		 525 fio->is_por ? META_POR : (__is_meta_io(fio) ?
526 META_GENERIC : DATA_GENERIC_ENHANCE)))
10f966bb 527 return -EFSCORRUPTED;
c9b60788 528
2ace38e0 529 trace_f2fs_submit_page_bio(page, fio);
05ca3632 530 f2fs_trace_ios(fio, 0);
93dfe2ac
JK		 531
532 /* Allocate a new bio */
b757f6ed 533 bio = __bio_alloc(fio, 1);
93dfe2ac 534
09cbfeaf 535 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
93dfe2ac 536 bio_put(bio);
93dfe2ac
JK		 537 return -EFAULT;
538 }
78efac53
CY		 539
540 if (fio->io_wbc && !is_read_io(fio->op))
34e51a5e 541 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
78efac53 542
04d328de 543 bio_set_op_attrs(bio, fio->op, fio->op_flags);
93dfe2ac 544
5f9abab4
JK		 545 inc_page_count(fio->sbi, is_read_io(fio->op) ?
546 __read_io_type(page): WB_DATA_TYPE(fio->page));
4c58ed07
CY		 547
548 __submit_bio(fio->sbi, bio, fio->type);
93dfe2ac
JK		 549 return 0;
550}
551
8896cbdf
CY		 552static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
553 block_t last_blkaddr, block_t cur_blkaddr)
554{
555 if (last_blkaddr + 1 != cur_blkaddr)
556 return false;
557 return __same_bdev(sbi, cur_blkaddr, bio);
558}
559
560static bool io_type_is_mergeable(struct f2fs_bio_info *io,
561 struct f2fs_io_info *fio)
562{
563 if (io->fio.op != fio->op)
564 return false;
565 return io->fio.op_flags == fio->op_flags;
566}
567
568static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
569 struct f2fs_bio_info *io,
570 struct f2fs_io_info *fio,
571 block_t last_blkaddr,
572 block_t cur_blkaddr)
573{
c72db71e
CY		 574 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
575 unsigned int filled_blocks =
576 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
577 unsigned int io_size = F2FS_IO_SIZE(sbi);
578 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
579
580 /* IOs in bio is aligned and left space of vectors is not enough */
581 if (!(filled_blocks % io_size) && left_vecs < io_size)
582 return false;
583 }
8896cbdf
CY		 584 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
585 return false;
586 return io_type_is_mergeable(io, fio);
587}
588
0b20fcec
CY		 589static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
590 struct page *page, enum temp_type temp)
591{
592 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
593 struct bio_entry *be;
594
595 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
596 be->bio = bio;
597 bio_get(bio);
598
599 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
600 f2fs_bug_on(sbi, 1);
601
602 down_write(&io->bio_list_lock);
603 list_add_tail(&be->list, &io->bio_list);
604 up_write(&io->bio_list_lock);
605}
606
607static void del_bio_entry(struct bio_entry *be)
608{
609 list_del(&be->list);
610 kmem_cache_free(bio_entry_slab, be);
611}
612
613static int add_ipu_page(struct f2fs_sb_info *sbi, struct bio **bio,
614 struct page *page)
615{
616 enum temp_type temp;
617 bool found = false;
618 int ret = -EAGAIN;
619
620 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
621 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
622 struct list_head *head = &io->bio_list;
623 struct bio_entry *be;
624
625 down_write(&io->bio_list_lock);
626 list_for_each_entry(be, head, list) {
627 if (be->bio != *bio)
628 continue;
629
630 found = true;
631
632 if (bio_add_page(*bio, page, PAGE_SIZE, 0) == PAGE_SIZE) {
633 ret = 0;
634 break;
635 }
636
637 /* bio is full */
638 del_bio_entry(be);
639 __submit_bio(sbi, *bio, DATA);
640 break;
641 }
642 up_write(&io->bio_list_lock);
643 }
644
645 if (ret) {
646 bio_put(*bio);
647 *bio = NULL;
648 }
649
650 return ret;
651}
652
653void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
654 struct bio **bio, struct page *page)
655{
656 enum temp_type temp;
657 bool found = false;
658 struct bio *target = bio ? *bio : NULL;
659
660 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
661 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
662 struct list_head *head = &io->bio_list;
663 struct bio_entry *be;
664
665 if (list_empty(head))
666 continue;
667
668 down_read(&io->bio_list_lock);
669 list_for_each_entry(be, head, list) {
670 if (target)
671 found = (target == be->bio);
672 else
673 found = __has_merged_page(be->bio, NULL,
674 page, 0);
675 if (found)
676 break;
677 }
678 up_read(&io->bio_list_lock);
679
680 if (!found)
681 continue;
682
683 found = false;
684
685 down_write(&io->bio_list_lock);
686 list_for_each_entry(be, head, list) {
687 if (target)
688 found = (target == be->bio);
689 else
690 found = __has_merged_page(be->bio, NULL,
691 page, 0);
692 if (found) {
693 target = be->bio;
694 del_bio_entry(be);
695 break;
696 }
697 }
698 up_write(&io->bio_list_lock);
699 }
700
701 if (found)
702 __submit_bio(sbi, target, DATA);
703 if (bio && *bio) {
704 bio_put(*bio);
705 *bio = NULL;
706 }
707}
708
8648de2c
CY		 709int f2fs_merge_page_bio(struct f2fs_io_info *fio)
710{
711 struct bio *bio = *fio->bio;
712 struct page *page = fio->encrypted_page ?
713 fio->encrypted_page : fio->page;
714
715 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
716 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
10f966bb 717 return -EFSCORRUPTED;
8648de2c
CY		 718
719 trace_f2fs_submit_page_bio(page, fio);
720 f2fs_trace_ios(fio, 0);
721
8896cbdf 722 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
0b20fcec
CY		 723 fio->new_blkaddr))
724 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
8648de2c
CY		 725alloc_new:
726 if (!bio) {
b757f6ed 727 bio = __bio_alloc(fio, BIO_MAX_PAGES);
8648de2c 728 bio_set_op_attrs(bio, fio->op, fio->op_flags);
8648de2c 729
0b20fcec
CY		 730 add_bio_entry(fio->sbi, bio, page, fio->temp);
731 } else {
732 if (add_ipu_page(fio->sbi, &bio, page))
733 goto alloc_new;
8648de2c
CY		 734 }
735
736 if (fio->io_wbc)
9637d517 737 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
8648de2c
CY		 738
739 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
740
741 *fio->last_block = fio->new_blkaddr;
742 *fio->bio = bio;
743
744 return 0;
745}
746
fe16efe6 747void f2fs_submit_page_write(struct f2fs_io_info *fio)
93dfe2ac 748{
05ca3632 749 struct f2fs_sb_info *sbi = fio->sbi;
458e6197 750 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
a912b54d 751 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
4375a336 752 struct page *bio_page;
93dfe2ac 753
b9109b0e 754 f2fs_bug_on(sbi, is_read_io(fio->op));
93dfe2ac 755
fb830fc5
CY		 756 down_write(&io->io_rwsem);
757next:
758 if (fio->in_list) {
759 spin_lock(&io->io_lock);
760 if (list_empty(&io->io_list)) {
761 spin_unlock(&io->io_lock);
fe16efe6 762 goto out;
fb830fc5
CY		 763 }
764 fio = list_first_entry(&io->io_list,
765 struct f2fs_io_info, list);
766 list_del(&fio->list);
767 spin_unlock(&io->io_lock);
768 }
93dfe2ac 769
93770ab7 770 verify_fio_blkaddr(fio);
93dfe2ac 771
36951b38
CY		 772 bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
773
ebf7c522
TM		 774 /* set submitted = true as a return value */
775 fio->submitted = true;
d68f735b 776
b9109b0e 777 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
93dfe2ac 778
8896cbdf
CY		 779 if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio,
780 io->last_block_in_bio, fio->new_blkaddr))
458e6197 781 __submit_merged_bio(io);
93dfe2ac
JK		 782alloc_new:
783 if (io->bio == NULL) {
8223ecc4
CY		 784 if (F2FS_IO_ALIGNED(sbi) &&
785 (fio->type == DATA || fio->type == NODE) &&
0a595eba 786 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
b9109b0e 787 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
fe16efe6
CY		 788 fio->retry = true;
789 goto skip;
0a595eba 790 }
b757f6ed 791 io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
458e6197 792 io->fio = *fio;
93dfe2ac
JK		 793 }
794
a912b54d 795 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
458e6197 796 __submit_merged_bio(io);
93dfe2ac
JK		 797 goto alloc_new;
798 }
799
578c6478 800 if (fio->io_wbc)
34e51a5e 801 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
578c6478 802
7a9d7548 803 io->last_block_in_bio = fio->new_blkaddr;
05ca3632 804 f2fs_trace_ios(fio, 0);
fb830fc5
CY		 805
806 trace_f2fs_submit_page_write(fio->page, fio);
fe16efe6 807skip:
fb830fc5
CY		 808 if (fio->in_list)
809 goto next;
fe16efe6 810out:
4354994f 811 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
00e09c0b 812 !f2fs_is_checkpoint_ready(sbi))
5ce80586 813 __submit_merged_bio(io);
df0f8dc0 814 up_write(&io->io_rwsem);
93dfe2ac
JK		 815}
816
95ae251f
EB		 817static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
818{
819 return fsverity_active(inode) &&
820 idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
821}
822
13ba41e3 823static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
95ae251f
EB		 824 unsigned nr_pages, unsigned op_flag,
825 pgoff_t first_idx)
13ba41e3
JK		 826{
827 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ba41e3 828 struct bio *bio;
6dbb1796
EB		 829 struct bio_post_read_ctx *ctx;
830 unsigned int post_read_steps = 0;
13ba41e3 831
d62fe971 832 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
6dbb1796 833 if (!bio)
13ba41e3 834 return ERR_PTR(-ENOMEM);
13ba41e3
JK		 835 f2fs_target_device(sbi, blkaddr, bio);
836 bio->bi_end_io = f2fs_read_end_io;
e2e59414 837 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
13ba41e3 838
6dbb1796
EB		 839 if (f2fs_encrypted_file(inode))
840 post_read_steps |= 1 << STEP_DECRYPT;
95ae251f
EB		 841
842 if (f2fs_need_verity(inode, first_idx))
843 post_read_steps |= 1 << STEP_VERITY;
844
6dbb1796
EB		 845 if (post_read_steps) {
846 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
847 if (!ctx) {
848 bio_put(bio);
849 return ERR_PTR(-ENOMEM);
850 }
851 ctx->bio = bio;
852 ctx->enabled_steps = post_read_steps;
853 bio->bi_private = ctx;
6dbb1796
EB		 854 }
855
13ba41e3
JK		 856 return bio;
857}
858
859/* This can handle encryption stuffs */
860static int f2fs_submit_page_read(struct inode *inode, struct page *page,
861 block_t blkaddr)
862{
93770ab7
CY		 863 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
864 struct bio *bio;
13ba41e3 865
95ae251f 866 bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index);
13ba41e3
JK		 867 if (IS_ERR(bio))
868 return PTR_ERR(bio);
869
0ded69f6
JK		 870 /* wait for GCed page writeback via META_MAPPING */
871 f2fs_wait_on_block_writeback(inode, blkaddr);
872
13ba41e3
JK		 873 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
874 bio_put(bio);
875 return -EFAULT;
876 }
fb7d70db 877 ClearPageError(page);
93770ab7
CY		 878 inc_page_count(sbi, F2FS_RD_DATA);
879 __submit_bio(sbi, bio, DATA);
13ba41e3
JK		 880 return 0;
881}
882
46008c6d
CY		 883static void __set_data_blkaddr(struct dnode_of_data *dn)
884{
885 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
886 __le32 *addr_array;
7a2af766
CY		 887 int base = 0;
888
889 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
890 base = get_extra_isize(dn->inode);
46008c6d
CY		 891
892 /* Get physical address of data block */
893 addr_array = blkaddr_in_node(rn);
7a2af766 894 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
46008c6d
CY		 895}
896
0a8165d7 897/*
eb47b800
JK		 898 * Lock ordering for the change of data block address:
899 * ->data_page
900 * ->node_page
901 * update block addresses in the node page
902 */
4d57b86d 903void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
eb47b800 904{
bae0ee7a 905 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 906 __set_data_blkaddr(dn);
907 if (set_page_dirty(dn->node_page))
12719ae1 908 dn->node_changed = true;
eb47b800
JK		 909}
910
f28b3434
CY		 911void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
912{
913 dn->data_blkaddr = blkaddr;
4d57b86d 914 f2fs_set_data_blkaddr(dn);
f28b3434
CY		 915 f2fs_update_extent_cache(dn);
916}
917
46008c6d 918/* dn->ofs_in_node will be returned with up-to-date last block pointer */
4d57b86d 919int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
eb47b800 920{
4081363f 921 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
0abd675e 922 int err;
eb47b800 923
46008c6d
CY		 924 if (!count)
925 return 0;
926
91942321 927 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
eb47b800 928 return -EPERM;
0abd675e
CY		 929 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
930 return err;
eb47b800 931
46008c6d
CY		 932 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
933 dn->ofs_in_node, count);
934
bae0ee7a 935 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 936
937 for (; count > 0; dn->ofs_in_node++) {
7a2af766
CY		 938 block_t blkaddr = datablock_addr(dn->inode,
939 dn->node_page, dn->ofs_in_node);
46008c6d
CY		 940 if (blkaddr == NULL_ADDR) {
941 dn->data_blkaddr = NEW_ADDR;
942 __set_data_blkaddr(dn);
943 count--;
944 }
945 }
946
947 if (set_page_dirty(dn->node_page))
948 dn->node_changed = true;
eb47b800
JK		 949 return 0;
950}
951
46008c6d 952/* Should keep dn->ofs_in_node unchanged */
4d57b86d 953int f2fs_reserve_new_block(struct dnode_of_data *dn)
46008c6d
CY		 954{
955 unsigned int ofs_in_node = dn->ofs_in_node;
956 int ret;
957
4d57b86d 958 ret = f2fs_reserve_new_blocks(dn, 1);
46008c6d
CY		 959 dn->ofs_in_node = ofs_in_node;
960 return ret;
961}
962
b600965c
HL		 963int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
964{
965 bool need_put = dn->inode_page ? false : true;
966 int err;
967
4d57b86d 968 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
b600965c
HL		 969 if (err)
970 return err;
a8865372 971
b600965c 972 if (dn->data_blkaddr == NULL_ADDR)
4d57b86d 973 err = f2fs_reserve_new_block(dn);
a8865372 974 if (err || need_put)
b600965c
HL		 975 f2fs_put_dnode(dn);
976 return err;
977}
978
759af1c9 979int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
eb47b800 980{
e15882b6 981 struct extent_info ei = {0,0,0};
759af1c9 982 struct inode *inode = dn->inode;
028a41e8 983
759af1c9
FL		 984 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
985 dn->data_blkaddr = ei.blk + index - ei.fofs;
986 return 0;
429511cd 987 }
028a41e8 988
759af1c9 989 return f2fs_reserve_block(dn, index);
eb47b800
JK		 990}
991
4d57b86d 992struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
04d328de 993 int op_flags, bool for_write)
eb47b800 994{
eb47b800
JK		 995 struct address_space *mapping = inode->i_mapping;
996 struct dnode_of_data dn;
997 struct page *page;
e15882b6 998 struct extent_info ei = {0,0,0};
eb47b800 999 int err;
4375a336 1000
a56c7c6f 1001 page = f2fs_grab_cache_page(mapping, index, for_write);
650495de
JK		 1002 if (!page)
1003 return ERR_PTR(-ENOMEM);
1004
cb3bc9ee
CY		 1005 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1006 dn.data_blkaddr = ei.blk + index - ei.fofs;
93770ab7
CY		 1007 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1008 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1009 err = -EFSCORRUPTED;
93770ab7
CY		 1010 goto put_err;
1011 }
cb3bc9ee
CY		 1012 goto got_it;
1013 }
1014
eb47b800 1015 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1016 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
86531d6b
JK		 1017 if (err)
1018 goto put_err;
eb47b800
JK		 1019 f2fs_put_dnode(&dn);
1020
6bacf52f 1021 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
86531d6b
JK		 1022 err = -ENOENT;
1023 goto put_err;
650495de 1024 }
93770ab7
CY		 1025 if (dn.data_blkaddr != NEW_ADDR &&
1026 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1027 dn.data_blkaddr,
1028 DATA_GENERIC_ENHANCE)) {
10f966bb 1029 err = -EFSCORRUPTED;
93770ab7
CY		 1030 goto put_err;
1031 }
cb3bc9ee 1032got_it:
43f3eae1
JK		 1033 if (PageUptodate(page)) {
1034 unlock_page(page);
eb47b800 1035 return page;
43f3eae1 1036 }
eb47b800 1037
d59ff4df
JK		 1038 /*
1039 * A new dentry page is allocated but not able to be written, since its
1040 * new inode page couldn't be allocated due to -ENOSPC.
1041 * In such the case, its blkaddr can be remained as NEW_ADDR.
4d57b86d
CY		 1042 * see, f2fs_add_link -> f2fs_get_new_data_page ->
1043 * f2fs_init_inode_metadata.
d59ff4df
JK		 1044 */
1045 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1046 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1047 if (!PageUptodate(page))
1048 SetPageUptodate(page);
43f3eae1 1049 unlock_page(page);
d59ff4df
JK		 1050 return page;
1051 }
eb47b800 1052
13ba41e3 1053 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr);
393ff91f 1054 if (err)
86531d6b 1055 goto put_err;
43f3eae1 1056 return page;
86531d6b
JK		 1057
1058put_err:
1059 f2fs_put_page(page, 1);
1060 return ERR_PTR(err);
43f3eae1
JK		 1061}
1062
4d57b86d 1063struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
43f3eae1
JK		 1064{
1065 struct address_space *mapping = inode->i_mapping;
1066 struct page *page;
1067
1068 page = find_get_page(mapping, index);
1069 if (page && PageUptodate(page))
1070 return page;
1071 f2fs_put_page(page, 0);
1072
4d57b86d 1073 page = f2fs_get_read_data_page(inode, index, 0, false);
43f3eae1
JK		 1074 if (IS_ERR(page))
1075 return page;
1076
1077 if (PageUptodate(page))
1078 return page;
1079
1080 wait_on_page_locked(page);
1081 if (unlikely(!PageUptodate(page))) {
1082 f2fs_put_page(page, 0);
1083 return ERR_PTR(-EIO);
1084 }
1085 return page;
1086}
1087
1088/*
1089 * If it tries to access a hole, return an error.
1090 * Because, the callers, functions in dir.c and GC, should be able to know
1091 * whether this page exists or not.
1092 */
4d57b86d 1093struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
a56c7c6f 1094 bool for_write)
43f3eae1
JK		 1095{
1096 struct address_space *mapping = inode->i_mapping;
1097 struct page *page;
1098repeat:
4d57b86d 1099 page = f2fs_get_read_data_page(inode, index, 0, for_write);
43f3eae1
JK		 1100 if (IS_ERR(page))
1101 return page;
393ff91f 1102
43f3eae1 1103 /* wait for read completion */
393ff91f 1104 lock_page(page);
6bacf52f 1105 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 1106 f2fs_put_page(page, 1);
1107 goto repeat;
eb47b800 1108 }
1563ac75
CY		 1109 if (unlikely(!PageUptodate(page))) {
1110 f2fs_put_page(page, 1);
1111 return ERR_PTR(-EIO);
1112 }
eb47b800
JK		 1113 return page;
1114}
1115
0a8165d7 1116/*
eb47b800
JK		 1117 * Caller ensures that this data page is never allocated.
1118 * A new zero-filled data page is allocated in the page cache.
39936837 1119 *
4f4124d0
CY		 1120 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
1121 * f2fs_unlock_op().
470f00e9
CY		 1122 * Note that, ipage is set only by make_empty_dir, and if any error occur,
1123 * ipage should be released by this function.
eb47b800 1124 */
4d57b86d 1125struct page *f2fs_get_new_data_page(struct inode *inode,
a8865372 1126 struct page *ipage, pgoff_t index, bool new_i_size)
eb47b800 1127{
eb47b800
JK		 1128 struct address_space *mapping = inode->i_mapping;
1129 struct page *page;
1130 struct dnode_of_data dn;
1131 int err;
7612118a 1132
a56c7c6f 1133 page = f2fs_grab_cache_page(mapping, index, true);
470f00e9
CY		 1134 if (!page) {
1135 /*
1136 * before exiting, we should make sure ipage will be released
1137 * if any error occur.
1138 */
1139 f2fs_put_page(ipage, 1);
01f28610 1140 return ERR_PTR(-ENOMEM);
470f00e9 1141 }
eb47b800 1142
a8865372 1143 set_new_dnode(&dn, inode, ipage, NULL, 0);
b600965c 1144 err = f2fs_reserve_block(&dn, index);
01f28610
JK		 1145 if (err) {
1146 f2fs_put_page(page, 1);
eb47b800 1147 return ERR_PTR(err);
a8865372 1148 }
01f28610
JK		 1149 if (!ipage)
1150 f2fs_put_dnode(&dn);
eb47b800
JK		 1151
1152 if (PageUptodate(page))
01f28610 1153 goto got_it;
eb47b800
JK		 1154
1155 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1156 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1157 if (!PageUptodate(page))
1158 SetPageUptodate(page);
eb47b800 1159 } else {
4375a336 1160 f2fs_put_page(page, 1);
a8865372 1161
7612118a
JK		 1162 /* if ipage exists, blkaddr should be NEW_ADDR */
1163 f2fs_bug_on(F2FS_I_SB(inode), ipage);
4d57b86d 1164 page = f2fs_get_lock_data_page(inode, index, true);
4375a336 1165 if (IS_ERR(page))
7612118a 1166 return page;
eb47b800 1167 }
01f28610 1168got_it:
9edcdabf 1169 if (new_i_size && i_size_read(inode) <
ee6d182f 1170 ((loff_t)(index + 1) << PAGE_SHIFT))
fc9581c8 1171 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
eb47b800
JK		 1172 return page;
1173}
1174
d5097be5 1175static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
bfad7c2d 1176{
4081363f 1177 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
bfad7c2d 1178 struct f2fs_summary sum;
bfad7c2d 1179 struct node_info ni;
6aa58d8a 1180 block_t old_blkaddr;
46008c6d 1181 blkcnt_t count = 1;
0abd675e 1182 int err;
bfad7c2d 1183
91942321 1184 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
bfad7c2d 1185 return -EPERM;
df6136ef 1186
7735730d
CY		 1187 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1188 if (err)
1189 return err;
1190
7a2af766
CY		 1191 dn->data_blkaddr = datablock_addr(dn->inode,
1192 dn->node_page, dn->ofs_in_node);
f847c699 1193 if (dn->data_blkaddr != NULL_ADDR)
df6136ef
CY		 1194 goto alloc;
1195
0abd675e
CY		 1196 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1197 return err;
bfad7c2d 1198
df6136ef 1199alloc:
bfad7c2d 1200 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
6aa58d8a
CY		 1201 old_blkaddr = dn->data_blkaddr;
1202 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
d5097be5 1203 &sum, seg_type, NULL, false);
6aa58d8a
CY		 1204 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1205 invalidate_mapping_pages(META_MAPPING(sbi),
1206 old_blkaddr, old_blkaddr);
86f35dc3 1207 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
bfad7c2d 1208
0a4daae5
JK		 1209 /*
1210 * i_size will be updated by direct_IO. Otherwise, we'll get stale
1211 * data from unwritten block via dio_read.
1212 */
bfad7c2d
JK		 1213 return 0;
1214}
1215
a7de6086 1216int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
59b802e5 1217{
b439b103 1218 struct inode *inode = file_inode(iocb->ki_filp);
5b8db7fa 1219 struct f2fs_map_blocks map;
d6d478a1 1220 int flag;
a7de6086 1221 int err = 0;
d6d478a1 1222 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
59b802e5 1223
0080c507 1224 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
dfd02e4d
CY		 1225 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1226 if (map.m_len > map.m_lblk)
1227 map.m_len -= map.m_lblk;
1228 else
1229 map.m_len = 0;
1230
da85985c 1231 map.m_next_pgofs = NULL;
c4020b2d 1232 map.m_next_extent = NULL;
d5097be5 1233 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1234 map.m_may_create = true;
2a340760 1235
d6d478a1 1236 if (direct_io) {
4d57b86d 1237 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
f847c699 1238 flag = f2fs_force_buffered_io(inode, iocb, from) ?
d6d478a1
CY		 1239 F2FS_GET_BLOCK_PRE_AIO :
1240 F2FS_GET_BLOCK_PRE_DIO;
1241 goto map_blocks;
d5097be5 1242 }
f2470371 1243 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
a7de6086
JK		 1244 err = f2fs_convert_inline_inode(inode);
1245 if (err)
1246 return err;
b439b103 1247 }
d6d478a1 1248 if (f2fs_has_inline_data(inode))
25006645 1249 return err;
d6d478a1
CY		 1250
1251 flag = F2FS_GET_BLOCK_PRE_AIO;
1252
1253map_blocks:
1254 err = f2fs_map_blocks(inode, &map, 1, flag);
1255 if (map.m_len > 0 && err == -ENOSPC) {
1256 if (!direct_io)
1257 set_inode_flag(inode, FI_NO_PREALLOC);
1258 err = 0;
25006645 1259 }
a7de6086 1260 return err;
59b802e5
JK		 1261}
1262
39a86958 1263void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
59c9081b
YH		 1264{
1265 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1266 if (lock)
1267 down_read(&sbi->node_change);
1268 else
1269 up_read(&sbi->node_change);
1270 } else {
1271 if (lock)
1272 f2fs_lock_op(sbi);
1273 else
1274 f2fs_unlock_op(sbi);
1275 }
1276}
1277
0a8165d7 1278/*
003a3e1d
JK		 1279 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
1280 * f2fs_map_blocks structure.
4f4124d0
CY		 1281 * If original data blocks are allocated, then give them to blockdev.
1282 * Otherwise,
1283 * a. preallocate requested block addresses
1284 * b. do not use extent cache for better performance
1285 * c. give the block addresses to blockdev
eb47b800 1286 */
d323d005 1287int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
e2b4e2bc 1288 int create, int flag)
eb47b800 1289{
003a3e1d 1290 unsigned int maxblocks = map->m_len;
eb47b800 1291 struct dnode_of_data dn;
f9811703 1292 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f9d6d059 1293 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
46008c6d 1294 pgoff_t pgofs, end_offset, end;
bfad7c2d 1295 int err = 0, ofs = 1;
46008c6d
CY		 1296 unsigned int ofs_in_node, last_ofs_in_node;
1297 blkcnt_t prealloc;
e15882b6 1298 struct extent_info ei = {0,0,0};
7df3a431 1299 block_t blkaddr;
c4020b2d 1300 unsigned int start_pgofs;
eb47b800 1301
dfd02e4d
CY		 1302 if (!maxblocks)
1303 return 0;
1304
003a3e1d
JK		 1305 map->m_len = 0;
1306 map->m_flags = 0;
1307
1308 /* it only supports block size == page size */
1309 pgofs = (pgoff_t)map->m_lblk;
46008c6d 1310 end = pgofs + maxblocks;
eb47b800 1311
24b84912 1312 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
f4f0b677
JZ		 1313 if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
1314 map->m_may_create)
1315 goto next_dnode;
1316
003a3e1d
JK		 1317 map->m_pblk = ei.blk + pgofs - ei.fofs;
1318 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1319 map->m_flags = F2FS_MAP_MAPPED;
c4020b2d
CY		 1320 if (map->m_next_extent)
1321 *map->m_next_extent = pgofs + map->m_len;
1e78e8bd
ST		 1322
1323 /* for hardware encryption, but to avoid potential issue in future */
1324 if (flag == F2FS_GET_BLOCK_DIO)
1325 f2fs_wait_on_block_writeback_range(inode,
1326 map->m_pblk, map->m_len);
bfad7c2d 1327 goto out;
a2e7d1bf 1328 }
bfad7c2d 1329
4fe71e88 1330next_dnode:
f9d6d059 1331 if (map->m_may_create)
59c9081b 1332 __do_map_lock(sbi, flag, true);
eb47b800
JK		 1333
1334 /* When reading holes, we need its node page */
1335 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1336 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1ec79083 1337 if (err) {
43473f96
CY		 1338 if (flag == F2FS_GET_BLOCK_BMAP)
1339 map->m_pblk = 0;
da85985c 1340 if (err == -ENOENT) {
bfad7c2d 1341 err = 0;
da85985c
CY		 1342 if (map->m_next_pgofs)
1343 *map->m_next_pgofs =
4d57b86d 1344 f2fs_get_next_page_offset(&dn, pgofs);
c4020b2d
CY		 1345 if (map->m_next_extent)
1346 *map->m_next_extent =
4d57b86d 1347 f2fs_get_next_page_offset(&dn, pgofs);
da85985c 1348 }
bfad7c2d 1349 goto unlock_out;
848753aa 1350 }
973163fc 1351
c4020b2d 1352 start_pgofs = pgofs;
46008c6d 1353 prealloc = 0;
230436b3 1354 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
81ca7350 1355 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
4fe71e88
CY		 1356
1357next_block:
7a2af766 1358 blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
4fe71e88 1359
c9b60788 1360 if (__is_valid_data_blkaddr(blkaddr) &&
93770ab7 1361 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
10f966bb 1362 err = -EFSCORRUPTED;
c9b60788
CY		 1363 goto sync_out;
1364 }
1365
93770ab7 1366 if (__is_valid_data_blkaddr(blkaddr)) {
f847c699 1367 /* use out-place-update for driect IO under LFS mode */
f9d6d059
CY		 1368 if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
1369 map->m_may_create) {
f847c699 1370 err = __allocate_data_block(&dn, map->m_seg_type);
05e36006
CY		 1371 if (err)
1372 goto sync_out;
1373 blkaddr = dn.data_blkaddr;
1374 set_inode_flag(inode, FI_APPEND_WRITE);
f847c699
CY		 1375 }
1376 } else {
973163fc 1377 if (create) {
f9811703
CY		 1378 if (unlikely(f2fs_cp_error(sbi))) {
1379 err = -EIO;
4fe71e88 1380 goto sync_out;
f9811703 1381 }
24b84912 1382 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
46008c6d
CY		 1383 if (blkaddr == NULL_ADDR) {
1384 prealloc++;
1385 last_ofs_in_node = dn.ofs_in_node;
1386 }
24b84912 1387 } else {
0a4daae5
JK		 1388 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1389 flag != F2FS_GET_BLOCK_DIO);
d5097be5
HL		 1390 err = __allocate_data_block(&dn,
1391 map->m_seg_type);
6f2d8ed6 1392 if (!err)
91942321 1393 set_inode_flag(inode, FI_APPEND_WRITE);
24b84912 1394 }
973163fc 1395 if (err)
4fe71e88 1396 goto sync_out;
3f2be043 1397 map->m_flags |= F2FS_MAP_NEW;
4fe71e88 1398 blkaddr = dn.data_blkaddr;
973163fc 1399 } else {
43473f96
CY		 1400 if (flag == F2FS_GET_BLOCK_BMAP) {
1401 map->m_pblk = 0;
1402 goto sync_out;
1403 }
c4020b2d
CY		 1404 if (flag == F2FS_GET_BLOCK_PRECACHE)
1405 goto sync_out;
da85985c
CY		 1406 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1407 blkaddr == NULL_ADDR) {
1408 if (map->m_next_pgofs)
1409 *map->m_next_pgofs = pgofs + 1;
4c2ac6a8 1410 goto sync_out;
da85985c 1411 }
f3d98e74
CY		 1412 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1413 /* for defragment case */
1414 if (map->m_next_pgofs)
1415 *map->m_next_pgofs = pgofs + 1;
4fe71e88 1416 goto sync_out;
f3d98e74 1417 }
e2b4e2bc 1418 }
e2b4e2bc 1419 }
eb47b800 1420
46008c6d
CY		 1421 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1422 goto skip;
1423
4fe71e88
CY		 1424 if (map->m_len == 0) {
1425 /* preallocated unwritten block should be mapped for fiemap. */
1426 if (blkaddr == NEW_ADDR)
1427 map->m_flags |= F2FS_MAP_UNWRITTEN;
1428 map->m_flags |= F2FS_MAP_MAPPED;
1429
1430 map->m_pblk = blkaddr;
1431 map->m_len = 1;
1432 } else if ((map->m_pblk != NEW_ADDR &&
1433 blkaddr == (map->m_pblk + ofs)) ||
b439b103 1434 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
46008c6d 1435 flag == F2FS_GET_BLOCK_PRE_DIO) {
4fe71e88
CY		 1436 ofs++;
1437 map->m_len++;
1438 } else {
1439 goto sync_out;
1440 }
bfad7c2d 1441
46008c6d 1442skip:
bfad7c2d
JK		 1443 dn.ofs_in_node++;
1444 pgofs++;
1445
46008c6d
CY		 1446 /* preallocate blocks in batch for one dnode page */
1447 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1448 (pgofs == end || dn.ofs_in_node == end_offset)) {
7df3a431 1449
46008c6d 1450 dn.ofs_in_node = ofs_in_node;
4d57b86d 1451 err = f2fs_reserve_new_blocks(&dn, prealloc);
46008c6d
CY		 1452 if (err)
1453 goto sync_out;
bfad7c2d 1454
46008c6d
CY		 1455 map->m_len += dn.ofs_in_node - ofs_in_node;
1456 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1457 err = -ENOSPC;
1458 goto sync_out;
3104af35 1459 }
46008c6d
CY		 1460 dn.ofs_in_node = end_offset;
1461 }
1462
1463 if (pgofs >= end)
1464 goto sync_out;
1465 else if (dn.ofs_in_node < end_offset)
1466 goto next_block;
1467
c4020b2d
CY		 1468 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1469 if (map->m_flags & F2FS_MAP_MAPPED) {
1470 unsigned int ofs = start_pgofs - map->m_lblk;
1471
1472 f2fs_update_extent_cache_range(&dn,
1473 start_pgofs, map->m_pblk + ofs,
1474 map->m_len - ofs);
1475 }
1476 }
1477
46008c6d
CY		 1478 f2fs_put_dnode(&dn);
1479
f9d6d059 1480 if (map->m_may_create) {
59c9081b 1481 __do_map_lock(sbi, flag, false);
6f2d8ed6 1482 f2fs_balance_fs(sbi, dn.node_changed);
eb47b800 1483 }
46008c6d 1484 goto next_dnode;
7df3a431 1485
bfad7c2d 1486sync_out:
1e78e8bd
ST		 1487
1488 /* for hardware encryption, but to avoid potential issue in future */
1489 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1490 f2fs_wait_on_block_writeback_range(inode,
1491 map->m_pblk, map->m_len);
1492
c4020b2d
CY		 1493 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1494 if (map->m_flags & F2FS_MAP_MAPPED) {
1495 unsigned int ofs = start_pgofs - map->m_lblk;
1496
1497 f2fs_update_extent_cache_range(&dn,
1498 start_pgofs, map->m_pblk + ofs,
1499 map->m_len - ofs);
1500 }
1501 if (map->m_next_extent)
1502 *map->m_next_extent = pgofs + 1;
1503 }
eb47b800 1504 f2fs_put_dnode(&dn);
bfad7c2d 1505unlock_out:
f9d6d059 1506 if (map->m_may_create) {
59c9081b 1507 __do_map_lock(sbi, flag, false);
6f2d8ed6 1508 f2fs_balance_fs(sbi, dn.node_changed);
2a340760 1509 }
bfad7c2d 1510out:
003a3e1d 1511 trace_f2fs_map_blocks(inode, map, err);
bfad7c2d 1512 return err;
eb47b800
JK		 1513}
1514
b91050a8
HL		 1515bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1516{
1517 struct f2fs_map_blocks map;
1518 block_t last_lblk;
1519 int err;
1520
1521 if (pos + len > i_size_read(inode))
1522 return false;
1523
1524 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1525 map.m_next_pgofs = NULL;
1526 map.m_next_extent = NULL;
1527 map.m_seg_type = NO_CHECK_TYPE;
f4f0b677 1528 map.m_may_create = false;
b91050a8
HL		 1529 last_lblk = F2FS_BLK_ALIGN(pos + len);
1530
1531 while (map.m_lblk < last_lblk) {
1532 map.m_len = last_lblk - map.m_lblk;
1533 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1534 if (err || map.m_len == 0)
1535 return false;
1536 map.m_lblk += map.m_len;
1537 }
1538 return true;
1539}
1540
003a3e1d 1541static int __get_data_block(struct inode *inode, sector_t iblock,
da85985c 1542 struct buffer_head *bh, int create, int flag,
f9d6d059 1543 pgoff_t *next_pgofs, int seg_type, bool may_write)
003a3e1d
JK		 1544{
1545 struct f2fs_map_blocks map;
a7de6086 1546 int err;
003a3e1d
JK		 1547
1548 map.m_lblk = iblock;
1549 map.m_len = bh->b_size >> inode->i_blkbits;
da85985c 1550 map.m_next_pgofs = next_pgofs;
c4020b2d 1551 map.m_next_extent = NULL;
d5097be5 1552 map.m_seg_type = seg_type;
f9d6d059 1553 map.m_may_create = may_write;
003a3e1d 1554
a7de6086
JK		 1555 err = f2fs_map_blocks(inode, &map, create, flag);
1556 if (!err) {
003a3e1d
JK		 1557 map_bh(bh, inode->i_sb, map.m_pblk);
1558 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
b86e3307 1559 bh->b_size = (u64)map.m_len << inode->i_blkbits;
003a3e1d 1560 }
a7de6086 1561 return err;
003a3e1d
JK		 1562}
1563
ccfb3000 1564static int get_data_block(struct inode *inode, sector_t iblock,
da85985c
CY		 1565 struct buffer_head *bh_result, int create, int flag,
1566 pgoff_t *next_pgofs)
e2b4e2bc 1567{
da85985c 1568 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1569 flag, next_pgofs,
f9d6d059
CY		 1570 NO_CHECK_TYPE, create);
1571}
1572
1573static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1574 struct buffer_head *bh_result, int create)
1575{
1576 return __get_data_block(inode, iblock, bh_result, create,
1577 F2FS_GET_BLOCK_DIO, NULL,
1578 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
75a037f3 1579 IS_SWAPFILE(inode) ? false : true);
e2b4e2bc
CY		 1580}
1581
1582static int get_data_block_dio(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1583 struct buffer_head *bh_result, int create)
1584{
e2b4e2bc 1585 return __get_data_block(inode, iblock, bh_result, create,
f9d6d059
CY		 1586 F2FS_GET_BLOCK_DIO, NULL,
1587 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1588 false);
ccfb3000
JK		 1589}
1590
e2b4e2bc 1591static int get_data_block_bmap(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1592 struct buffer_head *bh_result, int create)
1593{
179448bf 1594 /* Block number less than F2FS MAX BLOCKS */
e0afc4d6 1595 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
179448bf
YH		 1596 return -EFBIG;
1597
e2b4e2bc 1598 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1599 F2FS_GET_BLOCK_BMAP, NULL,
f9d6d059 1600 NO_CHECK_TYPE, create);
ccfb3000
JK		 1601}
1602
7f63eb77
JK		 1603static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1604{
1605 return (offset >> inode->i_blkbits);
1606}
1607
1608static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1609{
1610 return (blk << inode->i_blkbits);
1611}
1612
442a9dbd
CY		 1613static int f2fs_xattr_fiemap(struct inode *inode,
1614 struct fiemap_extent_info *fieinfo)
1615{
1616 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1617 struct page *page;
1618 struct node_info ni;
1619 __u64 phys = 0, len;
1620 __u32 flags;
1621 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1622 int err = 0;
1623
1624 if (f2fs_has_inline_xattr(inode)) {
1625 int offset;
1626
1627 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1628 inode->i_ino, false);
1629 if (!page)
1630 return -ENOMEM;
1631
7735730d
CY		 1632 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1633 if (err) {
1634 f2fs_put_page(page, 1);
1635 return err;
1636 }
442a9dbd
CY		 1637
1638 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1639 offset = offsetof(struct f2fs_inode, i_addr) +
1640 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
b323fd28 1641 get_inline_xattr_addrs(inode));
442a9dbd
CY		 1642
1643 phys += offset;
1644 len = inline_xattr_size(inode);
1645
1646 f2fs_put_page(page, 1);
1647
1648 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1649
1650 if (!xnid)
1651 flags |= FIEMAP_EXTENT_LAST;
1652
1653 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1654 if (err || err == 1)
1655 return err;
1656 }
1657
1658 if (xnid) {
1659 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1660 if (!page)
1661 return -ENOMEM;
1662
7735730d
CY		 1663 err = f2fs_get_node_info(sbi, xnid, &ni);
1664 if (err) {
1665 f2fs_put_page(page, 1);
1666 return err;
1667 }
442a9dbd
CY		 1668
1669 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1670 len = inode->i_sb->s_blocksize;
1671
1672 f2fs_put_page(page, 1);
1673
1674 flags = FIEMAP_EXTENT_LAST;
1675 }
1676
1677 if (phys)
1678 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1679
1680 return (err < 0 ? err : 0);
1681}
1682
9ab70134
JK		 1683int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1684 u64 start, u64 len)
1685{
7f63eb77
JK		 1686 struct buffer_head map_bh;
1687 sector_t start_blk, last_blk;
da85985c 1688 pgoff_t next_pgofs;
7f63eb77
JK		 1689 u64 logical = 0, phys = 0, size = 0;
1690 u32 flags = 0;
7f63eb77
JK		 1691 int ret = 0;
1692
c4020b2d
CY		 1693 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1694 ret = f2fs_precache_extents(inode);
1695 if (ret)
1696 return ret;
1697 }
1698
442a9dbd 1699 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
7f63eb77
JK		 1700 if (ret)
1701 return ret;
1702
f1b43d4c
CY		 1703 inode_lock(inode);
1704
442a9dbd
CY		 1705 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1706 ret = f2fs_xattr_fiemap(inode, fieinfo);
1707 goto out;
1708 }
1709
7975f349 1710 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
67f8cf3c
JK		 1711 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1712 if (ret != -EAGAIN)
f1b43d4c 1713 goto out;
67f8cf3c
JK		 1714 }
1715
7f63eb77
JK		 1716 if (logical_to_blk(inode, len) == 0)
1717 len = blk_to_logical(inode, 1);
1718
1719 start_blk = logical_to_blk(inode, start);
1720 last_blk = logical_to_blk(inode, start + len - 1);
9a950d52 1721
7f63eb77
JK		 1722next:
1723 memset(&map_bh, 0, sizeof(struct buffer_head));
1724 map_bh.b_size = len;
1725
e2b4e2bc 1726 ret = get_data_block(inode, start_blk, &map_bh, 0,
da85985c 1727 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
7f63eb77
JK		 1728 if (ret)
1729 goto out;
1730
1731 /* HOLE */
1732 if (!buffer_mapped(&map_bh)) {
da85985c 1733 start_blk = next_pgofs;
58736fa6
CY		 1734
1735 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
1736 F2FS_I_SB(inode)->max_file_blocks))
9a950d52 1737 goto prep_next;
58736fa6 1738
9a950d52
FL		 1739 flags |= FIEMAP_EXTENT_LAST;
1740 }
7f63eb77 1741
da5af127 1742 if (size) {
62230e0d 1743 if (IS_ENCRYPTED(inode))
da5af127
CY		 1744 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1745
9a950d52
FL		 1746 ret = fiemap_fill_next_extent(fieinfo, logical,
1747 phys, size, flags);
da5af127 1748 }
7f63eb77 1749
9a950d52
FL		 1750 if (start_blk > last_blk || ret)
1751 goto out;
7f63eb77 1752
9a950d52
FL		 1753 logical = blk_to_logical(inode, start_blk);
1754 phys = blk_to_logical(inode, map_bh.b_blocknr);
1755 size = map_bh.b_size;
1756 flags = 0;
1757 if (buffer_unwritten(&map_bh))
1758 flags = FIEMAP_EXTENT_UNWRITTEN;
7f63eb77 1759
9a950d52 1760 start_blk += logical_to_blk(inode, size);
7f63eb77 1761
9a950d52 1762prep_next:
7f63eb77
JK		 1763 cond_resched();
1764 if (fatal_signal_pending(current))
1765 ret = -EINTR;
1766 else
1767 goto next;
1768out:
1769 if (ret == 1)
1770 ret = 0;
1771
5955102c 1772 inode_unlock(inode);
7f63eb77 1773 return ret;
9ab70134
JK		 1774}
1775
95ae251f
EB		 1776static inline loff_t f2fs_readpage_limit(struct inode *inode)
1777{
1778 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1779 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1780 return inode->i_sb->s_maxbytes;
1781
1782 return i_size_read(inode);
1783}
1784
2df0ab04
CY		 1785static int f2fs_read_single_page(struct inode *inode, struct page *page,
1786 unsigned nr_pages,
1787 struct f2fs_map_blocks *map,
1788 struct bio **bio_ret,
1789 sector_t *last_block_in_bio,
1790 bool is_readahead)
1791{
1792 struct bio *bio = *bio_ret;
1793 const unsigned blkbits = inode->i_blkbits;
1794 const unsigned blocksize = 1 << blkbits;
1795 sector_t block_in_file;
1796 sector_t last_block;
1797 sector_t last_block_in_file;
1798 sector_t block_nr;
1799 int ret = 0;
1800
4969c06a 1801 block_in_file = (sector_t)page_index(page);
2df0ab04 1802 last_block = block_in_file + nr_pages;
95ae251f 1803 last_block_in_file = (f2fs_readpage_limit(inode) + blocksize - 1) >>
2df0ab04
CY		 1804 blkbits;
1805 if (last_block > last_block_in_file)
1806 last_block = last_block_in_file;
1807
1808 /* just zeroing out page which is beyond EOF */
1809 if (block_in_file >= last_block)
1810 goto zero_out;
1811 /*
1812 * Map blocks using the previous result first.
1813 */
1814 if ((map->m_flags & F2FS_MAP_MAPPED) &&
1815 block_in_file > map->m_lblk &&
1816 block_in_file < (map->m_lblk + map->m_len))
1817 goto got_it;
1818
1819 /*
1820 * Then do more f2fs_map_blocks() calls until we are
1821 * done with this page.
1822 */
1823 map->m_lblk = block_in_file;
1824 map->m_len = last_block - block_in_file;
1825
1826 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
1827 if (ret)
1828 goto out;
1829got_it:
1830 if ((map->m_flags & F2FS_MAP_MAPPED)) {
1831 block_nr = map->m_pblk + block_in_file - map->m_lblk;
1832 SetPageMappedToDisk(page);
1833
4969c06a
JK		 1834 if (!PageUptodate(page) && (!PageSwapCache(page) &&
1835 !cleancache_get_page(page))) {
2df0ab04
CY		 1836 SetPageUptodate(page);
1837 goto confused;
1838 }
1839
1840 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
93770ab7 1841 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1842 ret = -EFSCORRUPTED;
2df0ab04
CY		 1843 goto out;
1844 }
1845 } else {
1846zero_out:
1847 zero_user_segment(page, 0, PAGE_SIZE);
95ae251f
EB		 1848 if (f2fs_need_verity(inode, page->index) &&
1849 !fsverity_verify_page(page)) {
1850 ret = -EIO;
1851 goto out;
1852 }
2df0ab04
CY		 1853 if (!PageUptodate(page))
1854 SetPageUptodate(page);
1855 unlock_page(page);
1856 goto out;
1857 }
1858
1859 /*
1860 * This page will go to BIO. Do we need to send this
1861 * BIO off first?
1862 */
8896cbdf
CY		 1863 if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
1864 *last_block_in_bio, block_nr)) {
2df0ab04
CY		 1865submit_and_realloc:
1866 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1867 bio = NULL;
1868 }
1869 if (bio == NULL) {
1870 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
95ae251f 1871 is_readahead ? REQ_RAHEAD : 0, page->index);
2df0ab04
CY		 1872 if (IS_ERR(bio)) {
1873 ret = PTR_ERR(bio);
1874 bio = NULL;
1875 goto out;
1876 }
1877 }
1878
1879 /*
1880 * If the page is under writeback, we need to wait for
1881 * its completion to see the correct decrypted data.
1882 */
1883 f2fs_wait_on_block_writeback(inode, block_nr);
1884
1885 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
1886 goto submit_and_realloc;
1887
1888 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
1889 ClearPageError(page);
1890 *last_block_in_bio = block_nr;
1891 goto out;
1892confused:
1893 if (bio) {
1894 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1895 bio = NULL;
1896 }
1897 unlock_page(page);
1898out:
1899 *bio_ret = bio;
1900 return ret;
1901}
1902
f1e88660
JK		 1903/*
1904 * This function was originally taken from fs/mpage.c, and customized for f2fs.
1905 * Major change was from block_size == page_size in f2fs by default.
e2e59414
JK		 1906 *
1907 * Note that the aops->readpages() function is ONLY used for read-ahead. If
1908 * this function ever deviates from doing just read-ahead, it should either
1909 * use ->readpage() or do the necessary surgery to decouple ->readpages()
1910 * from read-ahead.
f1e88660
JK		 1911 */
1912static int f2fs_mpage_readpages(struct address_space *mapping,
1913 struct list_head *pages, struct page *page,
e2e59414 1914 unsigned nr_pages, bool is_readahead)
f1e88660
JK		 1915{
1916 struct bio *bio = NULL;
f1e88660
JK		 1917 sector_t last_block_in_bio = 0;
1918 struct inode *inode = mapping->host;
f1e88660 1919 struct f2fs_map_blocks map;
2df0ab04 1920 int ret = 0;
f1e88660
JK		 1921
1922 map.m_pblk = 0;
1923 map.m_lblk = 0;
1924 map.m_len = 0;
1925 map.m_flags = 0;
da85985c 1926 map.m_next_pgofs = NULL;
c4020b2d 1927 map.m_next_extent = NULL;
d5097be5 1928 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1929 map.m_may_create = false;
f1e88660 1930
736c0a74 1931 for (; nr_pages; nr_pages--) {
f1e88660 1932 if (pages) {
939afa94 1933 page = list_last_entry(pages, struct page, lru);
a83d50bc
KM		 1934
1935 prefetchw(&page->flags);
f1e88660
JK		 1936 list_del(&page->lru);
1937 if (add_to_page_cache_lru(page, mapping,
4969c06a 1938 page_index(page),
8a5c743e 1939 readahead_gfp_mask(mapping)))
f1e88660
JK		 1940 goto next_page;
1941 }
1942
2df0ab04
CY		 1943 ret = f2fs_read_single_page(inode, page, nr_pages, &map, &bio,
1944 &last_block_in_bio, is_readahead);
1945 if (ret) {
1946 SetPageError(page);
09cbfeaf 1947 zero_user_segment(page, 0, PAGE_SIZE);
f1e88660 1948 unlock_page(page);
f1e88660 1949 }
f1e88660
JK		 1950next_page:
1951 if (pages)
09cbfeaf 1952 put_page(page);
f1e88660
JK		 1953 }
1954 BUG_ON(pages && !list_empty(pages));
1955 if (bio)
4fc29c1a 1956 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2df0ab04 1957 return pages ? 0 : ret;
f1e88660
JK		 1958}
1959
eb47b800
JK		 1960static int f2fs_read_data_page(struct file *file, struct page *page)
1961{
4969c06a 1962 struct inode *inode = page_file_mapping(page)->host;
b3d208f9 1963 int ret = -EAGAIN;
9ffe0fb5 1964
c20e89cd
CY		 1965 trace_f2fs_readpage(page, DATA);
1966
e1c42045 1967 /* If the file has inline data, try to read it directly */
9ffe0fb5
HL		 1968 if (f2fs_has_inline_data(inode))
1969 ret = f2fs_read_inline_data(inode, page);
b3d208f9 1970 if (ret == -EAGAIN)
4969c06a
JK		 1971 ret = f2fs_mpage_readpages(page_file_mapping(page),
1972 NULL, page, 1, false);
9ffe0fb5 1973 return ret;
eb47b800
JK		 1974}
1975
1976static int f2fs_read_data_pages(struct file *file,
1977 struct address_space *mapping,
1978 struct list_head *pages, unsigned nr_pages)
1979{
71cb4aff 1980 struct inode *inode = mapping->host;
939afa94 1981 struct page *page = list_last_entry(pages, struct page, lru);
b8c29400
CY		 1982
1983 trace_f2fs_readpages(inode, page, nr_pages);
9ffe0fb5
HL		 1984
1985 /* If the file has inline data, skip readpages */
1986 if (f2fs_has_inline_data(inode))
1987 return 0;
1988
e2e59414 1989 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
eb47b800
JK		 1990}
1991
7eab0c0d
HP		 1992static int encrypt_one_page(struct f2fs_io_info *fio)
1993{
1994 struct inode *inode = fio->page->mapping->host;
6aa58d8a 1995 struct page *mpage;
7eab0c0d
HP		 1996 gfp_t gfp_flags = GFP_NOFS;
1997
1958593e 1998 if (!f2fs_encrypted_file(inode))
7eab0c0d
HP		 1999 return 0;
2000
6dbb1796 2001 /* wait for GCed page writeback via META_MAPPING */
0ded69f6 2002 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
7eab0c0d
HP		 2003
2004retry_encrypt:
53bc1d85
EB		 2005 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(fio->page,
2006 PAGE_SIZE, 0,
2007 gfp_flags);
6aa58d8a
CY		 2008 if (IS_ERR(fio->encrypted_page)) {
2009 /* flush pending IOs and wait for a while in the ENOMEM case */
2010 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2011 f2fs_flush_merged_writes(fio->sbi);
2012 congestion_wait(BLK_RW_ASYNC, HZ/50);
2013 gfp_flags |= __GFP_NOFAIL;
2014 goto retry_encrypt;
2015 }
2016 return PTR_ERR(fio->encrypted_page);
2017 }
7eab0c0d 2018
6aa58d8a
CY		 2019 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2020 if (mpage) {
2021 if (PageUptodate(mpage))
2022 memcpy(page_address(mpage),
2023 page_address(fio->encrypted_page), PAGE_SIZE);
2024 f2fs_put_page(mpage, 1);
7eab0c0d 2025 }
6aa58d8a 2026 return 0;
7eab0c0d
HP		 2027}
2028
bb9e3bb8
CY		 2029static inline bool check_inplace_update_policy(struct inode *inode,
2030 struct f2fs_io_info *fio)
7eab0c0d 2031{
bb9e3bb8
CY		 2032 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2033 unsigned int policy = SM_I(sbi)->ipu_policy;
7eab0c0d 2034
bb9e3bb8
CY		 2035 if (policy & (0x1 << F2FS_IPU_FORCE))
2036 return true;
4d57b86d 2037 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
bb9e3bb8
CY		 2038 return true;
2039 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2040 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2041 return true;
4d57b86d 2042 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
bb9e3bb8
CY		 2043 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2044 return true;
2045
2046 /*
2047 * IPU for rewrite async pages
2048 */
2049 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2050 fio && fio->op == REQ_OP_WRITE &&
2051 !(fio->op_flags & REQ_SYNC) &&
62230e0d 2052 !IS_ENCRYPTED(inode))
bb9e3bb8
CY		 2053 return true;
2054
2055 /* this is only set during fdatasync */
2056 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2057 is_inode_flag_set(inode, FI_NEED_IPU))
2058 return true;
2059
4354994f
DR		 2060 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2061 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2062 return true;
2063
bb9e3bb8
CY		 2064 return false;
2065}
2066
4d57b86d 2067bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8 2068{
1ad71a27
JK		 2069 if (f2fs_is_pinned_file(inode))
2070 return true;
bb9e3bb8
CY		 2071
2072 /* if this is cold file, we should overwrite to avoid fragmentation */
2073 if (file_is_cold(inode))
2074 return true;
2075
2076 return check_inplace_update_policy(inode, fio);
2077}
2078
4d57b86d 2079bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8
CY		 2080{
2081 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2082
2083 if (test_opt(sbi, LFS))
2084 return true;
2085 if (S_ISDIR(inode->i_mode))
2086 return true;
af033b2a
CY		 2087 if (IS_NOQUOTA(inode))
2088 return true;
bb9e3bb8
CY		 2089 if (f2fs_is_atomic_file(inode))
2090 return true;
2091 if (fio) {
2092 if (is_cold_data(fio->page))
2093 return true;
2094 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
2095 return true;
4354994f
DR		 2096 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2097 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2098 return true;
bb9e3bb8
CY		 2099 }
2100 return false;
2101}
2102
7eab0c0d
HP		 2103static inline bool need_inplace_update(struct f2fs_io_info *fio)
2104{
2105 struct inode *inode = fio->page->mapping->host;
2106
4d57b86d 2107 if (f2fs_should_update_outplace(inode, fio))
7eab0c0d
HP		 2108 return false;
2109
4d57b86d 2110 return f2fs_should_update_inplace(inode, fio);
7eab0c0d
HP		 2111}
2112
4d57b86d 2113int f2fs_do_write_data_page(struct f2fs_io_info *fio)
eb47b800 2114{
05ca3632 2115 struct page *page = fio->page;
eb47b800 2116 struct inode *inode = page->mapping->host;
eb47b800 2117 struct dnode_of_data dn;
e959c8f5 2118 struct extent_info ei = {0,0,0};
7735730d 2119 struct node_info ni;
e959c8f5 2120 bool ipu_force = false;
eb47b800
JK		 2121 int err = 0;
2122
2123 set_new_dnode(&dn, inode, NULL, NULL, 0);
e959c8f5
HP		 2124 if (need_inplace_update(fio) &&
2125 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2126 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
a817737e 2127
c9b60788 2128 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2129 DATA_GENERIC_ENHANCE))
10f966bb 2130 return -EFSCORRUPTED;
c9b60788
CY		 2131
2132 ipu_force = true;
2133 fio->need_lock = LOCK_DONE;
2134 goto got_it;
e959c8f5 2135 }
279d6df2 2136
d29460e5
JK		 2137 /* Deadlock due to between page->lock and f2fs_lock_op */
2138 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2139 return -EAGAIN;
279d6df2 2140
4d57b86d 2141 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
eb47b800 2142 if (err)
279d6df2 2143 goto out;
eb47b800 2144
28bc106b 2145 fio->old_blkaddr = dn.data_blkaddr;
eb47b800
JK		 2146
2147 /* This page is already truncated */
7a9d7548 2148 if (fio->old_blkaddr == NULL_ADDR) {
2bca1e23 2149 ClearPageUptodate(page);
2baf0781 2150 clear_cold_data(page);
eb47b800 2151 goto out_writepage;
2bca1e23 2152 }
e959c8f5 2153got_it:
c9b60788
CY		 2154 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2155 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2156 DATA_GENERIC_ENHANCE)) {
10f966bb 2157 err = -EFSCORRUPTED;
c9b60788
CY		 2158 goto out_writepage;
2159 }
eb47b800
JK		 2160 /*
2161 * If current allocation needs SSR,
2162 * it had better in-place writes for updated data.
2163 */
93770ab7
CY		 2164 if (ipu_force ||
2165 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
7b525dd0 2166 need_inplace_update(fio))) {
cc15620b
JK		 2167 err = encrypt_one_page(fio);
2168 if (err)
2169 goto out_writepage;
2170
2171 set_page_writeback(page);
17c50035 2172 ClearPageError(page);
279d6df2 2173 f2fs_put_dnode(&dn);
cc15620b 2174 if (fio->need_lock == LOCK_REQ)
279d6df2 2175 f2fs_unlock_op(fio->sbi);
4d57b86d 2176 err = f2fs_inplace_write_data(fio);
6492a335
CY		 2177 if (err) {
2178 if (f2fs_encrypted_file(inode))
d2d0727b 2179 fscrypt_finalize_bounce_page(&fio->encrypted_page);
6492a335
CY		 2180 if (PageWriteback(page))
2181 end_page_writeback(page);
cd23ffa9
CY		 2182 } else {
2183 set_inode_flag(inode, FI_UPDATE_WRITE);
6492a335 2184 }
7eab0c0d 2185 trace_f2fs_do_write_data_page(fio->page, IPU);
279d6df2 2186 return err;
eb47b800 2187 }
279d6df2 2188
cc15620b
JK		 2189 if (fio->need_lock == LOCK_RETRY) {
2190 if (!f2fs_trylock_op(fio->sbi)) {
2191 err = -EAGAIN;
2192 goto out_writepage;
2193 }
2194 fio->need_lock = LOCK_REQ;
2195 }
2196
7735730d
CY		 2197 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2198 if (err)
2199 goto out_writepage;
2200
2201 fio->version = ni.version;
2202
cc15620b
JK		 2203 err = encrypt_one_page(fio);
2204 if (err)
2205 goto out_writepage;
2206
2207 set_page_writeback(page);
17c50035 2208 ClearPageError(page);
cc15620b 2209
279d6df2 2210 /* LFS mode write path */
4d57b86d 2211 f2fs_outplace_write_data(&dn, fio);
279d6df2
HP		 2212 trace_f2fs_do_write_data_page(page, OPU);
2213 set_inode_flag(inode, FI_APPEND_WRITE);
2214 if (page->index == 0)
2215 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
eb47b800
JK		 2216out_writepage:
2217 f2fs_put_dnode(&dn);
279d6df2 2218out:
cc15620b 2219 if (fio->need_lock == LOCK_REQ)
279d6df2 2220 f2fs_unlock_op(fio->sbi);
eb47b800
JK		 2221 return err;
2222}
2223
d68f735b 2224static int __write_data_page(struct page *page, bool *submitted,
8648de2c
CY		 2225 struct bio **bio,
2226 sector_t *last_block,
b0af6d49
CY		 2227 struct writeback_control *wbc,
2228 enum iostat_type io_type)
eb47b800
JK		 2229{
2230 struct inode *inode = page->mapping->host;
4081363f 2231 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
eb47b800
JK		 2232 loff_t i_size = i_size_read(inode);
2233 const pgoff_t end_index = ((unsigned long long) i_size)
09cbfeaf 2234 >> PAGE_SHIFT;
1f0d5c91 2235 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
9ffe0fb5 2236 unsigned offset = 0;
39936837 2237 bool need_balance_fs = false;
eb47b800 2238 int err = 0;
458e6197 2239 struct f2fs_io_info fio = {
05ca3632 2240 .sbi = sbi,
39d787be 2241 .ino = inode->i_ino,
458e6197 2242 .type = DATA,
04d328de 2243 .op = REQ_OP_WRITE,
7637241e 2244 .op_flags = wbc_to_write_flags(wbc),
e959c8f5 2245 .old_blkaddr = NULL_ADDR,
05ca3632 2246 .page = page,
4375a336 2247 .encrypted_page = NULL,
d68f735b 2248 .submitted = false,
cc15620b 2249 .need_lock = LOCK_RETRY,
b0af6d49 2250 .io_type = io_type,
578c6478 2251 .io_wbc = wbc,
8648de2c
CY		 2252 .bio = bio,
2253 .last_block = last_block,
458e6197 2254 };
eb47b800 2255
ecda0de3
CY		 2256 trace_f2fs_writepage(page, DATA);
2257
db198ae0
CY		 2258 /* we should bypass data pages to proceed the kworkder jobs */
2259 if (unlikely(f2fs_cp_error(sbi))) {
2260 mapping_set_error(page->mapping, -EIO);
1174abfd
CY		 2261 /*
2262 * don't drop any dirty dentry pages for keeping lastest
2263 * directory structure.
2264 */
2265 if (S_ISDIR(inode->i_mode))
2266 goto redirty_out;
db198ae0
CY		 2267 goto out;
2268 }
2269
0771fcc7
CY		 2270 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2271 goto redirty_out;
2272
95ae251f 2273 if (page->index < end_index || f2fs_verity_in_progress(inode))
39936837 2274 goto write;
eb47b800
JK		 2275
2276 /*
2277 * If the offset is out-of-range of file size,
2278 * this page does not have to be written to disk.
2279 */
09cbfeaf 2280 offset = i_size & (PAGE_SIZE - 1);
76f60268 2281 if ((page->index >= end_index + 1) || !offset)
39936837 2282 goto out;
eb47b800 2283
09cbfeaf 2284 zero_user_segment(page, offset, PAGE_SIZE);
39936837 2285write:
1e84371f
JK		 2286 if (f2fs_is_drop_cache(inode))
2287 goto out;
e6e5f561
JK		 2288 /* we should not write 0'th page having journal header */
2289 if (f2fs_is_volatile_file(inode) && (!page->index ||
2290 (!wbc->for_reclaim &&
4d57b86d 2291 f2fs_available_free_memory(sbi, BASE_CHECK))))
1e84371f 2292 goto redirty_out;
eb47b800 2293
39936837 2294 /* Dentry blocks are controlled by checkpoint */
eb47b800 2295 if (S_ISDIR(inode->i_mode)) {
cc15620b 2296 fio.need_lock = LOCK_DONE;
4d57b86d 2297 err = f2fs_do_write_data_page(&fio);
8618b881
JK		 2298 goto done;
2299 }
9ffe0fb5 2300
8618b881 2301 if (!wbc->for_reclaim)
39936837 2302 need_balance_fs = true;
7f3037a5 2303 else if (has_not_enough_free_secs(sbi, 0, 0))
39936837 2304 goto redirty_out;
ef095d19
JK		 2305 else
2306 set_inode_flag(inode, FI_HOT_DATA);
eb47b800 2307
b3d208f9 2308 err = -EAGAIN;
dd7b2333 2309 if (f2fs_has_inline_data(inode)) {
b3d208f9 2310 err = f2fs_write_inline_data(inode, page);
dd7b2333
YH		 2311 if (!err)
2312 goto out;
2313 }
279d6df2 2314
cc15620b 2315 if (err == -EAGAIN) {
4d57b86d 2316 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2317 if (err == -EAGAIN) {
2318 fio.need_lock = LOCK_REQ;
4d57b86d 2319 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2320 }
2321 }
a0d00fad 2322
eb449797
CY		 2323 if (err) {
2324 file_set_keep_isize(inode);
2325 } else {
2326 down_write(&F2FS_I(inode)->i_sem);
2327 if (F2FS_I(inode)->last_disk_size < psize)
2328 F2FS_I(inode)->last_disk_size = psize;
2329 up_write(&F2FS_I(inode)->i_sem);
2330 }
279d6df2 2331
8618b881
JK		 2332done:
2333 if (err && err != -ENOENT)
2334 goto redirty_out;
eb47b800 2335
39936837 2336out:
a7ffdbe2 2337 inode_dec_dirty_pages(inode);
2baf0781 2338 if (err) {
2bca1e23 2339 ClearPageUptodate(page);
2baf0781
CY		 2340 clear_cold_data(page);
2341 }
0c3a5797
CY		 2342
2343 if (wbc->for_reclaim) {
bab475c5 2344 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
ef095d19 2345 clear_inode_flag(inode, FI_HOT_DATA);
4d57b86d 2346 f2fs_remove_dirty_inode(inode);
d68f735b 2347 submitted = NULL;
0c3a5797
CY		 2348 }
2349
eb47b800 2350 unlock_page(page);
186857c5 2351 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
0b20fcec 2352 !F2FS_I(inode)->cp_task)
a7881893 2353 f2fs_balance_fs(sbi, need_balance_fs);
0c3a5797 2354
d68f735b 2355 if (unlikely(f2fs_cp_error(sbi))) {
b9109b0e 2356 f2fs_submit_merged_write(sbi, DATA);
0b20fcec 2357 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
d68f735b
JK		 2358 submitted = NULL;
2359 }
2360
2361 if (submitted)
2362 *submitted = fio.submitted;
0c3a5797 2363
eb47b800
JK		 2364 return 0;
2365
eb47b800 2366redirty_out:
76f60268 2367 redirty_page_for_writepage(wbc, page);
5b19d284
JK		 2368 /*
2369 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2370 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2371 * file_write_and_wait_range() will see EIO error, which is critical
2372 * to return value of fsync() followed by atomic_write failure to user.
2373 */
2374 if (!err || wbc->for_reclaim)
0002b61b 2375 return AOP_WRITEPAGE_ACTIVATE;
b230e6ca
JK		 2376 unlock_page(page);
2377 return err;
fa9150a8
NJ		 2378}
2379
f566bae8
JK		 2380static int f2fs_write_data_page(struct page *page,
2381 struct writeback_control *wbc)
2382{
8648de2c 2383 return __write_data_page(page, NULL, NULL, NULL, wbc, FS_DATA_IO);
f566bae8
JK		 2384}
2385
8f46dcae
CY		 2386/*
2387 * This function was copied from write_cche_pages from mm/page-writeback.c.
2388 * The major change is making write step of cold data page separately from
2389 * warm/hot data page.
2390 */
2391static int f2fs_write_cache_pages(struct address_space *mapping,
b0af6d49
CY		 2392 struct writeback_control *wbc,
2393 enum iostat_type io_type)
8f46dcae
CY		 2394{
2395 int ret = 0;
2396 int done = 0;
2397 struct pagevec pvec;
c29fd0c0 2398 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
8648de2c
CY		 2399 struct bio *bio = NULL;
2400 sector_t last_block;
8f46dcae
CY		 2401 int nr_pages;
2402 pgoff_t uninitialized_var(writeback_index);
2403 pgoff_t index;
2404 pgoff_t end; /* Inclusive */
2405 pgoff_t done_index;
2406 int cycled;
2407 int range_whole = 0;
10bbd235 2408 xa_mark_t tag;
bab475c5 2409 int nwritten = 0;
8f46dcae 2410
86679820 2411 pagevec_init(&pvec);
46ae957f 2412
ef095d19
JK		 2413 if (get_dirty_pages(mapping->host) <=
2414 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2415 set_inode_flag(mapping->host, FI_HOT_DATA);
2416 else
2417 clear_inode_flag(mapping->host, FI_HOT_DATA);
2418
8f46dcae
CY		 2419 if (wbc->range_cyclic) {
2420 writeback_index = mapping->writeback_index; /* prev offset */
2421 index = writeback_index;
2422 if (index == 0)
2423 cycled = 1;
2424 else
2425 cycled = 0;
2426 end = -1;
2427 } else {
09cbfeaf
KS		 2428 index = wbc->range_start >> PAGE_SHIFT;
2429 end = wbc->range_end >> PAGE_SHIFT;
8f46dcae
CY		 2430 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2431 range_whole = 1;
2432 cycled = 1; /* ignore range_cyclic tests */
2433 }
2434 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2435 tag = PAGECACHE_TAG_TOWRITE;
2436 else
2437 tag = PAGECACHE_TAG_DIRTY;
2438retry:
2439 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2440 tag_pages_for_writeback(mapping, index, end);
2441 done_index = index;
2442 while (!done && (index <= end)) {
2443 int i;
2444
69c4f35d 2445 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
67fd707f 2446 tag);
8f46dcae
CY		 2447 if (nr_pages == 0)
2448 break;
2449
2450 for (i = 0; i < nr_pages; i++) {
2451 struct page *page = pvec.pages[i];
d68f735b 2452 bool submitted = false;
8f46dcae 2453
f8de4331 2454 /* give a priority to WB_SYNC threads */
c29fd0c0 2455 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
f8de4331
CY		 2456 wbc->sync_mode == WB_SYNC_NONE) {
2457 done = 1;
2458 break;
2459 }
2460
8f46dcae 2461 done_index = page->index;
d29460e5 2462retry_write:
8f46dcae
CY		 2463 lock_page(page);
2464
2465 if (unlikely(page->mapping != mapping)) {
2466continue_unlock:
2467 unlock_page(page);
2468 continue;
2469 }
2470
2471 if (!PageDirty(page)) {
2472 /* someone wrote it for us */
2473 goto continue_unlock;
2474 }
2475
8f46dcae 2476 if (PageWriteback(page)) {
0b20fcec 2477 if (wbc->sync_mode != WB_SYNC_NONE)
fec1d657 2478 f2fs_wait_on_page_writeback(page,
bae0ee7a 2479 DATA, true, true);
0b20fcec 2480 else
8f46dcae
CY		 2481 goto continue_unlock;
2482 }
2483
8f46dcae
CY		 2484 if (!clear_page_dirty_for_io(page))
2485 goto continue_unlock;
2486
8648de2c
CY		 2487 ret = __write_data_page(page, &submitted, &bio,
2488 &last_block, wbc, io_type);
8f46dcae 2489 if (unlikely(ret)) {
0002b61b
CY		 2490 /*
2491 * keep nr_to_write, since vfs uses this to
2492 * get # of written pages.
2493 */
2494 if (ret == AOP_WRITEPAGE_ACTIVATE) {
2495 unlock_page(page);
2496 ret = 0;
2497 continue;
d29460e5
JK		 2498 } else if (ret == -EAGAIN) {
2499 ret = 0;
2500 if (wbc->sync_mode == WB_SYNC_ALL) {
2501 cond_resched();
2502 congestion_wait(BLK_RW_ASYNC,
2503 HZ/50);
2504 goto retry_write;
2505 }
2506 continue;
0002b61b 2507 }
b230e6ca
JK		 2508 done_index = page->index + 1;
2509 done = 1;
2510 break;
d68f735b 2511 } else if (submitted) {
bab475c5 2512 nwritten++;
8f46dcae
CY		 2513 }
2514
f8de4331 2515 if (--wbc->nr_to_write <= 0 &&
687de7f1 2516 wbc->sync_mode == WB_SYNC_NONE) {
8f46dcae
CY		 2517 done = 1;
2518 break;
2519 }
2520 }
2521 pagevec_release(&pvec);
2522 cond_resched();
2523 }
2524
8f46dcae
CY		 2525 if (!cycled && !done) {
2526 cycled = 1;
2527 index = 0;
2528 end = writeback_index - 1;
2529 goto retry;
2530 }
2531 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
2532 mapping->writeback_index = done_index;
2533
bab475c5 2534 if (nwritten)
b9109b0e 2535 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
bab475c5 2536 NULL, 0, DATA);
8648de2c
CY		 2537 /* submit cached bio of IPU write */
2538 if (bio)
0b20fcec 2539 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
6ca56ca4 2540
8f46dcae
CY		 2541 return ret;
2542}
2543
853137ce
JK		 2544static inline bool __should_serialize_io(struct inode *inode,
2545 struct writeback_control *wbc)
2546{
2547 if (!S_ISREG(inode->i_mode))
2548 return false;
af033b2a
CY		 2549 if (IS_NOQUOTA(inode))
2550 return false;
040d2bb3
CY		 2551 /* to avoid deadlock in path of data flush */
2552 if (F2FS_I(inode)->cp_task)
2553 return false;
853137ce
JK		 2554 if (wbc->sync_mode != WB_SYNC_ALL)
2555 return true;
2556 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
2557 return true;
2558 return false;
2559}
2560
fc99fe27 2561static int __f2fs_write_data_pages(struct address_space *mapping,
b0af6d49
CY		 2562 struct writeback_control *wbc,
2563 enum iostat_type io_type)
eb47b800
JK		 2564{
2565 struct inode *inode = mapping->host;
4081363f 2566 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9dfa1baf 2567 struct blk_plug plug;
eb47b800 2568 int ret;
853137ce 2569 bool locked = false;
eb47b800 2570
cfb185a1 2571 /* deal with chardevs and other special file */
2572 if (!mapping->a_ops->writepage)
2573 return 0;
2574
6a290544
CY		 2575 /* skip writing if there is no dirty page in this inode */
2576 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
2577 return 0;
2578
0771fcc7
CY		 2579 /* during POR, we don't need to trigger writepage at all. */
2580 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2581 goto skip_write;
2582
af033b2a
CY		 2583 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
2584 wbc->sync_mode == WB_SYNC_NONE &&
a1257023 2585 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
4d57b86d 2586 f2fs_available_free_memory(sbi, DIRTY_DENTS))
a1257023
JK		 2587 goto skip_write;
2588
d323d005 2589 /* skip writing during file defragment */
91942321 2590 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
d323d005
CY		 2591 goto skip_write;
2592
d31c7c3f
YH		 2593 trace_f2fs_writepages(mapping->host, wbc, DATA);
2594
687de7f1
JK		 2595 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
2596 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0
CY		 2597 atomic_inc(&sbi->wb_sync_req[DATA]);
2598 else if (atomic_read(&sbi->wb_sync_req[DATA]))
687de7f1
JK		 2599 goto skip_write;
2600
853137ce
JK		 2601 if (__should_serialize_io(inode, wbc)) {
2602 mutex_lock(&sbi->writepages);
2603 locked = true;
2604 }
2605
9dfa1baf 2606 blk_start_plug(&plug);
b0af6d49 2607 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
9dfa1baf 2608 blk_finish_plug(&plug);
687de7f1 2609
853137ce
JK		 2610 if (locked)
2611 mutex_unlock(&sbi->writepages);
2612
687de7f1 2613 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0 2614 atomic_dec(&sbi->wb_sync_req[DATA]);
28ea6162
JK		 2615 /*
2616 * if some pages were truncated, we cannot guarantee its mapping->host
2617 * to detect pending bios.
2618 */
458e6197 2619
4d57b86d 2620 f2fs_remove_dirty_inode(inode);
eb47b800 2621 return ret;
d3baf95d
JK		 2622
2623skip_write:
a7ffdbe2 2624 wbc->pages_skipped += get_dirty_pages(inode);
d31c7c3f 2625 trace_f2fs_writepages(mapping->host, wbc, DATA);
d3baf95d 2626 return 0;
eb47b800
JK		 2627}
2628
b0af6d49
CY		 2629static int f2fs_write_data_pages(struct address_space *mapping,
2630 struct writeback_control *wbc)
2631{
2632 struct inode *inode = mapping->host;
2633
2634 return __f2fs_write_data_pages(mapping, wbc,
2635 F2FS_I(inode)->cp_task == current ?
2636 FS_CP_DATA_IO : FS_DATA_IO);
2637}
2638
3aab8f82
CY		 2639static void f2fs_write_failed(struct address_space *mapping, loff_t to)
2640{
2641 struct inode *inode = mapping->host;
819d9153 2642 loff_t i_size = i_size_read(inode);
3aab8f82 2643
3f188c23
JK		 2644 if (IS_NOQUOTA(inode))
2645 return;
2646
95ae251f
EB		 2647 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
2648 if (to > i_size && !f2fs_verity_in_progress(inode)) {
a33c1502 2649 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
6f8d4455 2650 down_write(&F2FS_I(inode)->i_mmap_sem);
a33c1502 2651
819d9153 2652 truncate_pagecache(inode, i_size);
3f188c23 2653 f2fs_truncate_blocks(inode, i_size, true);
a33c1502 2654
5a3a2d83 2655 up_write(&F2FS_I(inode)->i_mmap_sem);
6f8d4455 2656 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3aab8f82
CY		 2657 }
2658}
2659
2aadac08
JK		 2660static int prepare_write_begin(struct f2fs_sb_info *sbi,
2661 struct page *page, loff_t pos, unsigned len,
2662 block_t *blk_addr, bool *node_changed)
2663{
2664 struct inode *inode = page->mapping->host;
2665 pgoff_t index = page->index;
2666 struct dnode_of_data dn;
2667 struct page *ipage;
b4d07a3e 2668 bool locked = false;
e15882b6 2669 struct extent_info ei = {0,0,0};
2aadac08 2670 int err = 0;
2866fb16 2671 int flag;
2aadac08 2672
24b84912
JK		 2673 /*
2674 * we already allocated all the blocks, so we don't need to get
2675 * the block addresses when there is no need to fill the page.
2676 */
dc91de78 2677 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
95ae251f
EB		 2678 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
2679 !f2fs_verity_in_progress(inode))
24b84912
JK		 2680 return 0;
2681
2866fb16
SY		 2682 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
2683 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
2684 flag = F2FS_GET_BLOCK_DEFAULT;
2685 else
2686 flag = F2FS_GET_BLOCK_PRE_AIO;
2687
b4d07a3e 2688 if (f2fs_has_inline_data(inode) ||
09cbfeaf 2689 (pos & PAGE_MASK) >= i_size_read(inode)) {
2866fb16 2690 __do_map_lock(sbi, flag, true);
b4d07a3e
JK		 2691 locked = true;
2692 }
2693restart:
2aadac08 2694 /* check inline_data */
4d57b86d 2695 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2aadac08
JK		 2696 if (IS_ERR(ipage)) {
2697 err = PTR_ERR(ipage);
2698 goto unlock_out;
2699 }
2700
2701 set_new_dnode(&dn, inode, ipage, ipage, 0);
2702
2703 if (f2fs_has_inline_data(inode)) {
f2470371 2704 if (pos + len <= MAX_INLINE_DATA(inode)) {
4d57b86d 2705 f2fs_do_read_inline_data(page, ipage);
91942321 2706 set_inode_flag(inode, FI_DATA_EXIST);
ab47036d
CY		 2707 if (inode->i_nlink)
2708 set_inline_node(ipage);
2aadac08
JK		 2709 } else {
2710 err = f2fs_convert_inline_page(&dn, page);
2711 if (err)
b4d07a3e
JK		 2712 goto out;
2713 if (dn.data_blkaddr == NULL_ADDR)
2714 err = f2fs_get_block(&dn, index);
2715 }
2716 } else if (locked) {
2717 err = f2fs_get_block(&dn, index);
2718 } else {
2719 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
2720 dn.data_blkaddr = ei.blk + index - ei.fofs;
2721 } else {
b4d07a3e 2722 /* hole case */
4d57b86d 2723 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
4da7bf5a 2724 if (err || dn.data_blkaddr == NULL_ADDR) {
b4d07a3e 2725 f2fs_put_dnode(&dn);
59c9081b
YH		 2726 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
2727 true);
2866fb16 2728 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
b4d07a3e
JK		 2729 locked = true;
2730 goto restart;
2731 }
2aadac08
JK		 2732 }
2733 }
b4d07a3e 2734
2aadac08
JK		 2735 /* convert_inline_page can make node_changed */
2736 *blk_addr = dn.data_blkaddr;
2737 *node_changed = dn.node_changed;
b4d07a3e 2738out:
2aadac08
JK		 2739 f2fs_put_dnode(&dn);
2740unlock_out:
b4d07a3e 2741 if (locked)
2866fb16 2742 __do_map_lock(sbi, flag, false);
2aadac08
JK		 2743 return err;
2744}
2745
eb47b800
JK		 2746static int f2fs_write_begin(struct file *file, struct address_space *mapping,
2747 loff_t pos, unsigned len, unsigned flags,
2748 struct page **pagep, void **fsdata)
2749{
2750 struct inode *inode = mapping->host;
4081363f 2751 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86531d6b 2752 struct page *page = NULL;
09cbfeaf 2753 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
a2e2e76b 2754 bool need_balance = false, drop_atomic = false;
2aadac08 2755 block_t blkaddr = NULL_ADDR;
eb47b800
JK		 2756 int err = 0;
2757
62aed044
CY		 2758 trace_f2fs_write_begin(inode, pos, len, flags);
2759
00e09c0b
CY		 2760 if (!f2fs_is_checkpoint_ready(sbi)) {
2761 err = -ENOSPC;
4354994f 2762 goto fail;
00e09c0b 2763 }
4354994f 2764
455e3a58
JK		 2765 if ((f2fs_is_atomic_file(inode) &&
2766 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
2767 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
57864ae5 2768 err = -ENOMEM;
a2e2e76b 2769 drop_atomic = true;
57864ae5
JK		 2770 goto fail;
2771 }
2772
5f727395
JK		 2773 /*
2774 * We should check this at this moment to avoid deadlock on inode page
2775 * and #0 page. The locking rule for inline_data conversion should be:
2776 * lock_page(page #0) -> lock_page(inode_page)
2777 */
2778 if (index != 0) {
2779 err = f2fs_convert_inline_inode(inode);
2780 if (err)
2781 goto fail;
2782 }
afcb7ca0 2783repeat:
86d54795
JK		 2784 /*
2785 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
2786 * wait_for_stable_page. Will wait that below with our IO control.
2787 */
01eccef7 2788 page = f2fs_pagecache_get_page(mapping, index,
86d54795 2789 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3aab8f82
CY		 2790 if (!page) {
2791 err = -ENOMEM;
2792 goto fail;
2793 }
d5f66990 2794
eb47b800
JK		 2795 *pagep = page;
2796
2aadac08
JK		 2797 err = prepare_write_begin(sbi, page, pos, len,
2798 &blkaddr, &need_balance);
9ba69cf9 2799 if (err)
2aadac08 2800 goto fail;
9ba69cf9 2801
af033b2a
CY		 2802 if (need_balance && !IS_NOQUOTA(inode) &&
2803 has_not_enough_free_secs(sbi, 0, 0)) {
2a340760 2804 unlock_page(page);
2c4db1a6 2805 f2fs_balance_fs(sbi, true);
2a340760
JK		 2806 lock_page(page);
2807 if (page->mapping != mapping) {
2808 /* The page got truncated from under us */
2809 f2fs_put_page(page, 1);
2810 goto repeat;
2811 }
2812 }
2813
bae0ee7a 2814 f2fs_wait_on_page_writeback(page, DATA, false, true);
b3d208f9 2815
649d7df2
JK		 2816 if (len == PAGE_SIZE || PageUptodate(page))
2817 return 0;
eb47b800 2818
95ae251f
EB		 2819 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
2820 !f2fs_verity_in_progress(inode)) {
746e2403
YH		 2821 zero_user_segment(page, len, PAGE_SIZE);
2822 return 0;
2823 }
2824
2aadac08 2825 if (blkaddr == NEW_ADDR) {
09cbfeaf 2826 zero_user_segment(page, 0, PAGE_SIZE);
649d7df2 2827 SetPageUptodate(page);
eb47b800 2828 } else {
93770ab7
CY		 2829 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
2830 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 2831 err = -EFSCORRUPTED;
93770ab7
CY		 2832 goto fail;
2833 }
13ba41e3
JK		 2834 err = f2fs_submit_page_read(inode, page, blkaddr);
2835 if (err)
78682f79 2836 goto fail;
d54c795b 2837
393ff91f 2838 lock_page(page);
6bacf52f 2839 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 2840 f2fs_put_page(page, 1);
2841 goto repeat;
eb47b800 2842 }
1563ac75
CY		 2843 if (unlikely(!PageUptodate(page))) {
2844 err = -EIO;
2845 goto fail;
4375a336 2846 }
eb47b800 2847 }
eb47b800 2848 return 0;
9ba69cf9 2849
3aab8f82 2850fail:
86531d6b 2851 f2fs_put_page(page, 1);
3aab8f82 2852 f2fs_write_failed(mapping, pos + len);
a2e2e76b 2853 if (drop_atomic)
4d57b86d 2854 f2fs_drop_inmem_pages_all(sbi, false);
3aab8f82 2855 return err;
eb47b800
JK		 2856}
2857
a1dd3c13
JK		 2858static int f2fs_write_end(struct file *file,
2859 struct address_space *mapping,
2860 loff_t pos, unsigned len, unsigned copied,
2861 struct page *page, void *fsdata)
2862{
2863 struct inode *inode = page->mapping->host;
2864
dfb2bf38
CY		 2865 trace_f2fs_write_end(inode, pos, len, copied);
2866
649d7df2
JK		 2867 /*
2868 * This should be come from len == PAGE_SIZE, and we expect copied
2869 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
2870 * let generic_perform_write() try to copy data again through copied=0.
2871 */
2872 if (!PageUptodate(page)) {
746e2403 2873 if (unlikely(copied != len))
649d7df2
JK		 2874 copied = 0;
2875 else
2876 SetPageUptodate(page);
2877 }
2878 if (!copied)
2879 goto unlock_out;
2880
34ba94ba 2881 set_page_dirty(page);
a1dd3c13 2882
95ae251f
EB		 2883 if (pos + copied > i_size_read(inode) &&
2884 !f2fs_verity_in_progress(inode))
fc9581c8 2885 f2fs_i_size_write(inode, pos + copied);
649d7df2 2886unlock_out:
3024c9a1 2887 f2fs_put_page(page, 1);
d0239e1b 2888 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
a1dd3c13
JK		 2889 return copied;
2890}
2891
6f673763
OS		 2892static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
2893 loff_t offset)
944fcfc1 2894{
8a56dd96
JK		 2895 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
2896 unsigned blkbits = i_blkbits;
2897 unsigned blocksize_mask = (1 << blkbits) - 1;
2898 unsigned long align = offset | iov_iter_alignment(iter);
2899 struct block_device *bdev = inode->i_sb->s_bdev;
2900
2901 if (align & blocksize_mask) {
2902 if (bdev)
2903 blkbits = blksize_bits(bdev_logical_block_size(bdev));
2904 blocksize_mask = (1 << blkbits) - 1;
2905 if (align & blocksize_mask)
2906 return -EINVAL;
2907 return 1;
2908 }
944fcfc1
JK		 2909 return 0;
2910}
2911
02b16d0a
CY		 2912static void f2fs_dio_end_io(struct bio *bio)
2913{
2914 struct f2fs_private_dio *dio = bio->bi_private;
2915
2916 dec_page_count(F2FS_I_SB(dio->inode),
2917 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
2918
2919 bio->bi_private = dio->orig_private;
2920 bio->bi_end_io = dio->orig_end_io;
2921
5222595d 2922 kvfree(dio);
02b16d0a
CY		 2923
2924 bio_endio(bio);
2925}
2926
2927static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
2928 loff_t file_offset)
2929{
2930 struct f2fs_private_dio *dio;
2931 bool write = (bio_op(bio) == REQ_OP_WRITE);
02b16d0a
CY		 2932
2933 dio = f2fs_kzalloc(F2FS_I_SB(inode),
2934 sizeof(struct f2fs_private_dio), GFP_NOFS);
8e114038 2935 if (!dio)
02b16d0a 2936 goto out;
02b16d0a
CY		 2937
2938 dio->inode = inode;
2939 dio->orig_end_io = bio->bi_end_io;
2940 dio->orig_private = bio->bi_private;
2941 dio->write = write;
2942
2943 bio->bi_end_io = f2fs_dio_end_io;
2944 bio->bi_private = dio;
2945
2946 inc_page_count(F2FS_I_SB(inode),
2947 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
2948
2949 submit_bio(bio);
2950 return;
2951out:
2952 bio->bi_status = BLK_STS_IOERR;
2953 bio_endio(bio);
2954}
2955
c8b8e32d 2956static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
eb47b800 2957{
b439b103 2958 struct address_space *mapping = iocb->ki_filp->f_mapping;
3aab8f82 2959 struct inode *inode = mapping->host;
0cdd3195 2960 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f847c699 2961 struct f2fs_inode_info *fi = F2FS_I(inode);
3aab8f82 2962 size_t count = iov_iter_count(iter);
c8b8e32d 2963 loff_t offset = iocb->ki_pos;
82e0a5aa 2964 int rw = iov_iter_rw(iter);
3aab8f82 2965 int err;
0cdd3195 2966 enum rw_hint hint = iocb->ki_hint;
63189b78 2967 int whint_mode = F2FS_OPTION(sbi).whint_mode;
f847c699 2968 bool do_opu;
944fcfc1 2969
b439b103 2970 err = check_direct_IO(inode, iter, offset);
b9d777b8 2971 if (err)
8a56dd96 2972 return err < 0 ? err : 0;
9ffe0fb5 2973
f847c699 2974 if (f2fs_force_buffered_io(inode, iocb, iter))
36abef4e 2975 return 0;
fcc85a4d 2976
f847c699
CY		 2977 do_opu = allow_outplace_dio(inode, iocb, iter);
2978
5302fb00 2979 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
70407fad 2980
0cdd3195
HL		 2981 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
2982 iocb->ki_hint = WRITE_LIFE_NOT_SET;
2983
f847c699
CY		 2984 if (iocb->ki_flags & IOCB_NOWAIT) {
2985 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
2986 iocb->ki_hint = hint;
2987 err = -EAGAIN;
2988 goto out;
2989 }
2990 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
2991 up_read(&fi->i_gc_rwsem[rw]);
b91050a8
HL		 2992 iocb->ki_hint = hint;
2993 err = -EAGAIN;
2994 goto out;
2995 }
f847c699
CY		 2996 } else {
2997 down_read(&fi->i_gc_rwsem[rw]);
2998 if (do_opu)
2999 down_read(&fi->i_gc_rwsem[READ]);
b91050a8
HL		 3000 }
3001
02b16d0a 3002 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
f9d6d059
CY		 3003 iter, rw == WRITE ? get_data_block_dio_write :
3004 get_data_block_dio, NULL, f2fs_dio_submit_bio,
02b16d0a 3005 DIO_LOCKING | DIO_SKIP_HOLES);
f847c699
CY		 3006
3007 if (do_opu)
3008 up_read(&fi->i_gc_rwsem[READ]);
3009
3010 up_read(&fi->i_gc_rwsem[rw]);
82e0a5aa
CY		 3011
3012 if (rw == WRITE) {
0cdd3195
HL		 3013 if (whint_mode == WHINT_MODE_OFF)
3014 iocb->ki_hint = hint;
b0af6d49
CY		 3015 if (err > 0) {
3016 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3017 err);
f847c699
CY		 3018 if (!do_opu)
3019 set_inode_flag(inode, FI_UPDATE_WRITE);
b0af6d49 3020 } else if (err < 0) {
6bfc4919 3021 f2fs_write_failed(mapping, offset + count);
b0af6d49 3022 }
6bfc4919 3023 }
70407fad 3024
b91050a8 3025out:
5302fb00 3026 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
70407fad 3027
3aab8f82 3028 return err;
eb47b800
JK		 3029}
3030
487261f3
CY		 3031void f2fs_invalidate_page(struct page *page, unsigned int offset,
3032 unsigned int length)
eb47b800
JK		 3033{
3034 struct inode *inode = page->mapping->host;
487261f3 3035 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
a7ffdbe2 3036
487261f3 3037 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
09cbfeaf 3038 (offset % PAGE_SIZE || length != PAGE_SIZE))
a7ffdbe2
JK		 3039 return;
3040
487261f3 3041 if (PageDirty(page)) {
933439c8 3042 if (inode->i_ino == F2FS_META_INO(sbi)) {
487261f3 3043 dec_page_count(sbi, F2FS_DIRTY_META);
933439c8 3044 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
487261f3 3045 dec_page_count(sbi, F2FS_DIRTY_NODES);
933439c8 3046 } else {
487261f3 3047 inode_dec_dirty_pages(inode);
4d57b86d 3048 f2fs_remove_dirty_inode(inode);
933439c8 3049 }
487261f3 3050 }
decd36b6 3051
2baf0781
CY		 3052 clear_cold_data(page);
3053
decd36b6 3054 if (IS_ATOMIC_WRITTEN_PAGE(page))
4d57b86d 3055 return f2fs_drop_inmem_page(inode, page);
decd36b6 3056
240a5915 3057 f2fs_clear_page_private(page);
eb47b800
JK		 3058}
3059
487261f3 3060int f2fs_release_page(struct page *page, gfp_t wait)
eb47b800 3061{
f68daeeb
JK		 3062 /* If this is dirty page, keep PagePrivate */
3063 if (PageDirty(page))
3064 return 0;
3065
decd36b6
CY		 3066 /* This is atomic written page, keep Private */
3067 if (IS_ATOMIC_WRITTEN_PAGE(page))
3068 return 0;
3069
2baf0781 3070 clear_cold_data(page);
240a5915 3071 f2fs_clear_page_private(page);
c3850aa1 3072 return 1;
eb47b800
JK		 3073}
3074
3075static int f2fs_set_data_page_dirty(struct page *page)
3076{
4969c06a 3077 struct inode *inode = page_file_mapping(page)->host;
eb47b800 3078
26c6b887
JK		 3079 trace_f2fs_set_page_dirty(page, DATA);
3080
237c0790
JK		 3081 if (!PageUptodate(page))
3082 SetPageUptodate(page);
4969c06a
JK		 3083 if (PageSwapCache(page))
3084 return __set_page_dirty_nobuffers(page);
34ba94ba 3085
5fe45743 3086 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
decd36b6 3087 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
4d57b86d 3088 f2fs_register_inmem_page(inode, page);
decd36b6
CY		 3089 return 1;
3090 }
3091 /*
3092 * Previously, this page has been registered, we just
3093 * return here.
3094 */
3095 return 0;
34ba94ba
JK		 3096 }
3097
eb47b800 3098 if (!PageDirty(page)) {
b87078ad 3099 __set_page_dirty_nobuffers(page);
4d57b86d 3100 f2fs_update_dirty_page(inode, page);
eb47b800
JK		 3101 return 1;
3102 }
3103 return 0;
3104}
3105
c01e54b7
JK		 3106static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3107{
454ae7e5
CY		 3108 struct inode *inode = mapping->host;
3109
1d373a0e
JK		 3110 if (f2fs_has_inline_data(inode))
3111 return 0;
3112
3113 /* make sure allocating whole blocks */
3114 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3115 filemap_write_and_wait(mapping);
3116
e2b4e2bc 3117 return generic_block_bmap(mapping, block, get_data_block_bmap);
429511cd
CY		 3118}
3119
5b7a487c
WG		 3120#ifdef CONFIG_MIGRATION
3121#include <linux/migrate.h>
3122
3123int f2fs_migrate_page(struct address_space *mapping,
3124 struct page *newpage, struct page *page, enum migrate_mode mode)
3125{
3126 int rc, extra_count;
3127 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3128 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
3129
3130 BUG_ON(PageWriteback(page));
3131
3132 /* migrating an atomic written page is safe with the inmem_lock hold */
ff1048e7
JK		 3133 if (atomic_written) {
3134 if (mode != MIGRATE_SYNC)
3135 return -EBUSY;
3136 if (!mutex_trylock(&fi->inmem_lock))
3137 return -EAGAIN;
3138 }
5b7a487c 3139
240a5915
CY		 3140 /* one extra reference was held for atomic_write page */
3141 extra_count = atomic_written ? 1 : 0;
5b7a487c 3142 rc = migrate_page_move_mapping(mapping, newpage,
37109694 3143 page, extra_count);
5b7a487c
WG		 3144 if (rc != MIGRATEPAGE_SUCCESS) {
3145 if (atomic_written)
3146 mutex_unlock(&fi->inmem_lock);
3147 return rc;
3148 }
3149
3150 if (atomic_written) {
3151 struct inmem_pages *cur;
3152 list_for_each_entry(cur, &fi->inmem_pages, list)
3153 if (cur->page == page) {
3154 cur->page = newpage;
3155 break;
3156 }
3157 mutex_unlock(&fi->inmem_lock);
3158 put_page(page);
3159 get_page(newpage);
3160 }
3161
240a5915
CY		 3162 if (PagePrivate(page)) {
3163 f2fs_set_page_private(newpage, page_private(page));
3164 f2fs_clear_page_private(page);
3165 }
5b7a487c 3166
2916ecc0
JG		 3167 if (mode != MIGRATE_SYNC_NO_COPY)
3168 migrate_page_copy(newpage, page);
3169 else
3170 migrate_page_states(newpage, page);
5b7a487c
WG		 3171
3172 return MIGRATEPAGE_SUCCESS;
3173}
3174#endif
3175
4969c06a
JK		 3176#ifdef CONFIG_SWAP
3177/* Copied from generic_swapfile_activate() to check any holes */
3178static int check_swap_activate(struct file *swap_file, unsigned int max)
3179{
3180 struct address_space *mapping = swap_file->f_mapping;
3181 struct inode *inode = mapping->host;
3182 unsigned blocks_per_page;
3183 unsigned long page_no;
3184 unsigned blkbits;
3185 sector_t probe_block;
3186 sector_t last_block;
3187 sector_t lowest_block = -1;
3188 sector_t highest_block = 0;
3189
3190 blkbits = inode->i_blkbits;
3191 blocks_per_page = PAGE_SIZE >> blkbits;
3192
3193 /*
3194 * Map all the blocks into the extent list. This code doesn't try
3195 * to be very smart.
3196 */
3197 probe_block = 0;
3198 page_no = 0;
3199 last_block = i_size_read(inode) >> blkbits;
3200 while ((probe_block + blocks_per_page) <= last_block && page_no < max) {
3201 unsigned block_in_page;
3202 sector_t first_block;
3203
3204 cond_resched();
3205
3206 first_block = bmap(inode, probe_block);
3207 if (first_block == 0)
3208 goto bad_bmap;
3209
3210 /*
3211 * It must be PAGE_SIZE aligned on-disk
3212 */
3213 if (first_block & (blocks_per_page - 1)) {
3214 probe_block++;
3215 goto reprobe;
3216 }
3217
3218 for (block_in_page = 1; block_in_page < blocks_per_page;
3219 block_in_page++) {
3220 sector_t block;
3221
3222 block = bmap(inode, probe_block + block_in_page);
3223 if (block == 0)
3224 goto bad_bmap;
3225 if (block != first_block + block_in_page) {
3226 /* Discontiguity */
3227 probe_block++;
3228 goto reprobe;
3229 }
3230 }
3231
3232 first_block >>= (PAGE_SHIFT - blkbits);
3233 if (page_no) { /* exclude the header page */
3234 if (first_block < lowest_block)
3235 lowest_block = first_block;
3236 if (first_block > highest_block)
3237 highest_block = first_block;
3238 }
3239
3240 page_no++;
3241 probe_block += blocks_per_page;
3242reprobe:
3243 continue;
3244 }
3245 return 0;
3246
3247bad_bmap:
3248 pr_err("swapon: swapfile has holes\n");
3249 return -EINVAL;
3250}
3251
3252static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3253 sector_t *span)
3254{
3255 struct inode *inode = file_inode(file);
3256 int ret;
3257
3258 if (!S_ISREG(inode->i_mode))
3259 return -EINVAL;
3260
3261 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3262 return -EROFS;
3263
3264 ret = f2fs_convert_inline_inode(inode);
3265 if (ret)
3266 return ret;
3267
3268 ret = check_swap_activate(file, sis->max);
3269 if (ret)
3270 return ret;
3271
3272 set_inode_flag(inode, FI_PIN_FILE);
3273 f2fs_precache_extents(inode);
3274 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3275 return 0;
3276}
3277
3278static void f2fs_swap_deactivate(struct file *file)
3279{
3280 struct inode *inode = file_inode(file);
3281
3282 clear_inode_flag(inode, FI_PIN_FILE);
3283}
3284#else
3285static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3286 sector_t *span)
3287{
3288 return -EOPNOTSUPP;
3289}
3290
3291static void f2fs_swap_deactivate(struct file *file)
3292{
3293}
3294#endif
3295
eb47b800
JK		 3296const struct address_space_operations f2fs_dblock_aops = {
3297 .readpage = f2fs_read_data_page,
3298 .readpages = f2fs_read_data_pages,
3299 .writepage = f2fs_write_data_page,
3300 .writepages = f2fs_write_data_pages,
3301 .write_begin = f2fs_write_begin,
a1dd3c13 3302 .write_end = f2fs_write_end,
eb47b800 3303 .set_page_dirty = f2fs_set_data_page_dirty,
487261f3
CY		 3304 .invalidatepage = f2fs_invalidate_page,
3305 .releasepage = f2fs_release_page,
eb47b800 3306 .direct_IO = f2fs_direct_IO,
c01e54b7 3307 .bmap = f2fs_bmap,
4969c06a
JK		 3308 .swap_activate = f2fs_swap_activate,
3309 .swap_deactivate = f2fs_swap_deactivate,
5b7a487c
WG		 3310#ifdef CONFIG_MIGRATION
3311 .migratepage = f2fs_migrate_page,
3312#endif
eb47b800 3313};
6dbb1796 3314
5ec2d99d 3315void f2fs_clear_page_cache_dirty_tag(struct page *page)
aec2f729
CY		 3316{
3317 struct address_space *mapping = page_mapping(page);
3318 unsigned long flags;
3319
3320 xa_lock_irqsave(&mapping->i_pages, flags);
5ec2d99d 3321 __xa_clear_mark(&mapping->i_pages, page_index(page),
aec2f729
CY		 3322 PAGECACHE_TAG_DIRTY);
3323 xa_unlock_irqrestore(&mapping->i_pages, flags);
3324}
3325
6dbb1796
EB		 3326int __init f2fs_init_post_read_processing(void)
3327{
95ae251f
EB		 3328 bio_post_read_ctx_cache =
3329 kmem_cache_create("f2fs_bio_post_read_ctx",
3330 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
6dbb1796
EB		 3331 if (!bio_post_read_ctx_cache)
3332 goto fail;
3333 bio_post_read_ctx_pool =
3334 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3335 bio_post_read_ctx_cache);
3336 if (!bio_post_read_ctx_pool)
3337 goto fail_free_cache;
3338 return 0;
3339
3340fail_free_cache:
3341 kmem_cache_destroy(bio_post_read_ctx_cache);
3342fail:
3343 return -ENOMEM;
3344}
3345
0b20fcec 3346void f2fs_destroy_post_read_processing(void)
6dbb1796
EB		 3347{
3348 mempool_destroy(bio_post_read_ctx_pool);
3349 kmem_cache_destroy(bio_post_read_ctx_cache);
3350}
0b20fcec
CY		 3351
3352int __init f2fs_init_bio_entry_cache(void)
3353{
3354 bio_entry_slab = f2fs_kmem_cache_create("bio_entry_slab",
3355 sizeof(struct bio_entry));
3356 if (!bio_entry_slab)
3357 return -ENOMEM;
3358 return 0;
3359}
3360
f543805f 3361void f2fs_destroy_bio_entry_cache(void)
0b20fcec
CY		 3362{
3363 kmem_cache_destroy(bio_entry_slab);
3364}
Linux 6.x block layer and io_uring tree(s)