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f2fs: fix to avoid memory leakage in f2fs_listxattr
[people/ms/linux.git] / fs / f2fs / data.c
CommitLineData
7c1a000d 1// SPDX-License-Identifier: GPL-2.0
0a8165d7 2/*
eb47b800
JK		 3 * fs/f2fs/data.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
eb47b800
JK		 7 */
8#include <linux/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/buffer_head.h>
11#include <linux/mpage.h>
12#include <linux/writeback.h>
13#include <linux/backing-dev.h>
8f46dcae 14#include <linux/pagevec.h>
eb47b800
JK		 15#include <linux/blkdev.h>
16#include <linux/bio.h>
4969c06a 17#include <linux/swap.h>
690e4a3e 18#include <linux/prefetch.h>
e2e40f2c 19#include <linux/uio.h>
f1e88660 20#include <linux/cleancache.h>
174cd4b1 21#include <linux/sched/signal.h>
eb47b800
JK		 22
23#include "f2fs.h"
24#include "node.h"
25#include "segment.h"
db9f7c1a 26#include "trace.h"
848753aa 27#include <trace/events/f2fs.h>
eb47b800 28
6dbb1796
EB		 29#define NUM_PREALLOC_POST_READ_CTXS 128
30
31static struct kmem_cache *bio_post_read_ctx_cache;
32static mempool_t *bio_post_read_ctx_pool;
33
36951b38
CY		 34static bool __is_cp_guaranteed(struct page *page)
35{
36 struct address_space *mapping = page->mapping;
37 struct inode *inode;
38 struct f2fs_sb_info *sbi;
39
40 if (!mapping)
41 return false;
42
43 inode = mapping->host;
44 sbi = F2FS_I_SB(inode);
45
46 if (inode->i_ino == F2FS_META_INO(sbi) ||
47 inode->i_ino == F2FS_NODE_INO(sbi) ||
48 S_ISDIR(inode->i_mode) ||
e7a4feb0 49 (S_ISREG(inode->i_mode) &&
af033b2a 50 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
36951b38
CY		 51 is_cold_data(page))
52 return true;
53 return false;
54}
55
5f9abab4
JK		 56static enum count_type __read_io_type(struct page *page)
57{
4969c06a 58 struct address_space *mapping = page_file_mapping(page);
5f9abab4
JK		 59
60 if (mapping) {
61 struct inode *inode = mapping->host;
62 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
63
64 if (inode->i_ino == F2FS_META_INO(sbi))
65 return F2FS_RD_META;
66
67 if (inode->i_ino == F2FS_NODE_INO(sbi))
68 return F2FS_RD_NODE;
69 }
70 return F2FS_RD_DATA;
71}
72
6dbb1796
EB		 73/* postprocessing steps for read bios */
74enum bio_post_read_step {
75 STEP_INITIAL = 0,
76 STEP_DECRYPT,
95ae251f 77 STEP_VERITY,
6dbb1796
EB		 78};
79
80struct bio_post_read_ctx {
81 struct bio *bio;
82 struct work_struct work;
83 unsigned int cur_step;
84 unsigned int enabled_steps;
85};
86
87static void __read_end_io(struct bio *bio)
93dfe2ac 88{
6dbb1796
EB		 89 struct page *page;
90 struct bio_vec *bv;
6dc4f100 91 struct bvec_iter_all iter_all;
93dfe2ac 92
2b070cfe 93 bio_for_each_segment_all(bv, bio, iter_all) {
6dbb1796
EB		 94 page = bv->bv_page;
95
96 /* PG_error was set if any post_read step failed */
97 if (bio->bi_status || PageError(page)) {
98 ClearPageUptodate(page);
fb7d70db
JK		 99 /* will re-read again later */
100 ClearPageError(page);
6dbb1796
EB		 101 } else {
102 SetPageUptodate(page);
103 }
5f9abab4 104 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
6dbb1796
EB		 105 unlock_page(page);
106 }
107 if (bio->bi_private)
108 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
109 bio_put(bio);
110}
111
112static void bio_post_read_processing(struct bio_post_read_ctx *ctx);
113
114static void decrypt_work(struct work_struct *work)
115{
116 struct bio_post_read_ctx *ctx =
117 container_of(work, struct bio_post_read_ctx, work);
118
119 fscrypt_decrypt_bio(ctx->bio);
120
121 bio_post_read_processing(ctx);
122}
123
95ae251f
EB		 124static void verity_work(struct work_struct *work)
125{
126 struct bio_post_read_ctx *ctx =
127 container_of(work, struct bio_post_read_ctx, work);
128
129 fsverity_verify_bio(ctx->bio);
130
131 bio_post_read_processing(ctx);
132}
133
6dbb1796
EB		 134static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
135{
95ae251f
EB		 136 /*
137 * We use different work queues for decryption and for verity because
138 * verity may require reading metadata pages that need decryption, and
139 * we shouldn't recurse to the same workqueue.
140 */
6dbb1796
EB		 141 switch (++ctx->cur_step) {
142 case STEP_DECRYPT:
143 if (ctx->enabled_steps & (1 << STEP_DECRYPT)) {
144 INIT_WORK(&ctx->work, decrypt_work);
145 fscrypt_enqueue_decrypt_work(&ctx->work);
146 return;
147 }
148 ctx->cur_step++;
149 /* fall-through */
95ae251f
EB		 150 case STEP_VERITY:
151 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
152 INIT_WORK(&ctx->work, verity_work);
153 fsverity_enqueue_verify_work(&ctx->work);
154 return;
155 }
156 ctx->cur_step++;
157 /* fall-through */
6dbb1796
EB		 158 default:
159 __read_end_io(ctx->bio);
160 }
161}
162
163static bool f2fs_bio_post_read_required(struct bio *bio)
164{
165 return bio->bi_private && !bio->bi_status;
166}
167
168static void f2fs_read_end_io(struct bio *bio)
169{
6f5c2ed0
CY		 170 if (time_to_inject(F2FS_P_SB(bio_first_page_all(bio)),
171 FAULT_READ_IO)) {
172 f2fs_show_injection_info(FAULT_READ_IO);
4e4cbee9 173 bio->bi_status = BLK_STS_IOERR;
55523519 174 }
8b038c70 175
6dbb1796
EB		 176 if (f2fs_bio_post_read_required(bio)) {
177 struct bio_post_read_ctx *ctx = bio->bi_private;
f1e88660 178
6dbb1796
EB		 179 ctx->cur_step = STEP_INITIAL;
180 bio_post_read_processing(ctx);
181 return;
f1e88660 182 }
6dbb1796
EB		 183
184 __read_end_io(bio);
f1e88660
JK		 185}
186
4246a0b6 187static void f2fs_write_end_io(struct bio *bio)
93dfe2ac 188{
1b1f559f 189 struct f2fs_sb_info *sbi = bio->bi_private;
f568849e 190 struct bio_vec *bvec;
6dc4f100 191 struct bvec_iter_all iter_all;
93dfe2ac 192
6f5c2ed0
CY		 193 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
194 f2fs_show_injection_info(FAULT_WRITE_IO);
195 bio->bi_status = BLK_STS_IOERR;
196 }
197
2b070cfe 198 bio_for_each_segment_all(bvec, bio, iter_all) {
93dfe2ac 199 struct page *page = bvec->bv_page;
36951b38 200 enum count_type type = WB_DATA_TYPE(page);
93dfe2ac 201
0a595eba
JK		 202 if (IS_DUMMY_WRITTEN_PAGE(page)) {
203 set_page_private(page, (unsigned long)NULL);
204 ClearPagePrivate(page);
205 unlock_page(page);
206 mempool_free(page, sbi->write_io_dummy);
207
4e4cbee9 208 if (unlikely(bio->bi_status))
0a595eba
JK		 209 f2fs_stop_checkpoint(sbi, true);
210 continue;
211 }
212
d2d0727b 213 fscrypt_finalize_bounce_page(&page);
4375a336 214
4e4cbee9 215 if (unlikely(bio->bi_status)) {
5114a97a 216 mapping_set_error(page->mapping, -EIO);
b1ca321d
JK		 217 if (type == F2FS_WB_CP_DATA)
218 f2fs_stop_checkpoint(sbi, true);
93dfe2ac 219 }
7dff55d2
YH		 220
221 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
222 page->index != nid_of_node(page));
223
36951b38 224 dec_page_count(sbi, type);
50fa53ec
CY		 225 if (f2fs_in_warm_node_list(sbi, page))
226 f2fs_del_fsync_node_entry(sbi, page);
36951b38 227 clear_cold_data(page);
93dfe2ac 228 end_page_writeback(page);
f568849e 229 }
36951b38 230 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
f5730184 231 wq_has_sleeper(&sbi->cp_wait))
93dfe2ac
JK		 232 wake_up(&sbi->cp_wait);
233
234 bio_put(bio);
235}
236
3c62be17
JK		 237/*
238 * Return true, if pre_bio's bdev is same as its target device.
239 */
240struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
241 block_t blk_addr, struct bio *bio)
242{
243 struct block_device *bdev = sbi->sb->s_bdev;
244 int i;
245
0916878d
DLM		 246 if (f2fs_is_multi_device(sbi)) {
247 for (i = 0; i < sbi->s_ndevs; i++) {
248 if (FDEV(i).start_blk <= blk_addr &&
249 FDEV(i).end_blk >= blk_addr) {
250 blk_addr -= FDEV(i).start_blk;
251 bdev = FDEV(i).bdev;
252 break;
253 }
3c62be17
JK		 254 }
255 }
256 if (bio) {
74d46992 257 bio_set_dev(bio, bdev);
3c62be17
JK		 258 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
259 }
260 return bdev;
261}
262
263int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
264{
265 int i;
266
0916878d
DLM		 267 if (!f2fs_is_multi_device(sbi))
268 return 0;
269
3c62be17
JK		 270 for (i = 0; i < sbi->s_ndevs; i++)
271 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
272 return i;
273 return 0;
274}
275
276static bool __same_bdev(struct f2fs_sb_info *sbi,
277 block_t blk_addr, struct bio *bio)
278{
74d46992
CH		 279 struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
280 return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
3c62be17
JK		 281}
282
940a6d34
GZ		 283/*
284 * Low-level block read/write IO operations.
285 */
b757f6ed 286static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
940a6d34 287{
b757f6ed 288 struct f2fs_sb_info *sbi = fio->sbi;
940a6d34
GZ		 289 struct bio *bio;
290
d62fe971 291 bio = f2fs_bio_alloc(sbi, npages, true);
940a6d34 292
b757f6ed
CY		 293 f2fs_target_device(sbi, fio->new_blkaddr, bio);
294 if (is_read_io(fio->op)) {
0cdd3195
HL		 295 bio->bi_end_io = f2fs_read_end_io;
296 bio->bi_private = NULL;
297 } else {
298 bio->bi_end_io = f2fs_write_end_io;
299 bio->bi_private = sbi;
b757f6ed
CY		 300 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
301 fio->type, fio->temp);
0cdd3195 302 }
b757f6ed
CY		 303 if (fio->io_wbc)
304 wbc_init_bio(fio->io_wbc, bio);
940a6d34
GZ		 305
306 return bio;
307}
308
4fc29c1a
LT		 309static inline void __submit_bio(struct f2fs_sb_info *sbi,
310 struct bio *bio, enum page_type type)
f5730184 311{
4fc29c1a 312 if (!is_read_io(bio_op(bio))) {
0a595eba
JK		 313 unsigned int start;
314
0a595eba
JK		 315 if (type != DATA && type != NODE)
316 goto submit_io;
317
66415cee 318 if (test_opt(sbi, LFS) && current->plug)
3bb09a0e
TY		 319 blk_finish_plug(current->plug);
320
8223ecc4
CY		 321 if (F2FS_IO_ALIGNED(sbi))
322 goto submit_io;
323
0a595eba
JK		 324 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
325 start %= F2FS_IO_SIZE(sbi);
326
327 if (start == 0)
328 goto submit_io;
329
330 /* fill dummy pages */
331 for (; start < F2FS_IO_SIZE(sbi); start++) {
332 struct page *page =
333 mempool_alloc(sbi->write_io_dummy,
bc73a4b2 334 GFP_NOIO | __GFP_NOFAIL);
0a595eba
JK		 335 f2fs_bug_on(sbi, !page);
336
bc73a4b2 337 zero_user_segment(page, 0, PAGE_SIZE);
0a595eba
JK		 338 SetPagePrivate(page);
339 set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
340 lock_page(page);
341 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
342 f2fs_bug_on(sbi, 1);
343 }
344 /*
345 * In the NODE case, we lose next block address chain. So, we
346 * need to do checkpoint in f2fs_sync_file.
347 */
348 if (type == NODE)
349 set_sbi_flag(sbi, SBI_NEED_CP);
19a5f5e2 350 }
0a595eba 351submit_io:
554b5125
JK		 352 if (is_read_io(bio_op(bio)))
353 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
354 else
355 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
4e49ea4a 356 submit_bio(bio);
f5730184
JK		 357}
358
458e6197 359static void __submit_merged_bio(struct f2fs_bio_info *io)
93dfe2ac 360{
458e6197 361 struct f2fs_io_info *fio = &io->fio;
93dfe2ac
JK		 362
363 if (!io->bio)
364 return;
365
554b5125
JK		 366 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
367
04d328de 368 if (is_read_io(fio->op))
554b5125 369 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
6a8f8ca5 370 else
554b5125 371 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
04d328de 372
4fc29c1a 373 __submit_bio(io->sbi, io->bio, fio->type);
93dfe2ac
JK		 374 io->bio = NULL;
375}
376
8648de2c 377static bool __has_merged_page(struct bio *bio, struct inode *inode,
bab475c5 378 struct page *page, nid_t ino)
0fd785eb 379{
0fd785eb
CY		 380 struct bio_vec *bvec;
381 struct page *target;
6dc4f100 382 struct bvec_iter_all iter_all;
0fd785eb 383
8648de2c 384 if (!bio)
0fd785eb 385 return false;
0c3a5797 386
bab475c5 387 if (!inode && !page && !ino)
0c3a5797 388 return true;
0fd785eb 389
8648de2c 390 bio_for_each_segment_all(bvec, bio, iter_all) {
0fd785eb 391
d2d0727b
EB		 392 target = bvec->bv_page;
393 if (fscrypt_is_bounce_page(target))
394 target = fscrypt_pagecache_page(target);
0fd785eb 395
0c3a5797
CY		 396 if (inode && inode == target->mapping->host)
397 return true;
bab475c5
CY		 398 if (page && page == target)
399 return true;
0c3a5797 400 if (ino && ino == ino_of_node(target))
0fd785eb 401 return true;
0fd785eb
CY		 402 }
403
0fd785eb
CY		 404 return false;
405}
406
b9109b0e 407static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
a912b54d 408 enum page_type type, enum temp_type temp)
93dfe2ac
JK		 409{
410 enum page_type btype = PAGE_TYPE_OF_BIO(type);
a912b54d 411 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
93dfe2ac 412
df0f8dc0 413 down_write(&io->io_rwsem);
458e6197
JK		 414
415 /* change META to META_FLUSH in the checkpoint procedure */
416 if (type >= META_FLUSH) {
417 io->fio.type = META_FLUSH;
04d328de 418 io->fio.op = REQ_OP_WRITE;
3adc5fcb 419 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
70fd7614 420 if (!test_opt(sbi, NOBARRIER))
7f54f51f 421 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
458e6197
JK		 422 }
423 __submit_merged_bio(io);
df0f8dc0 424 up_write(&io->io_rwsem);
93dfe2ac
JK		 425}
426
a912b54d 427static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 428 struct inode *inode, struct page *page,
429 nid_t ino, enum page_type type, bool force)
0c3a5797 430{
a912b54d 431 enum temp_type temp;
1e771e83 432 bool ret = true;
a912b54d
JK		 433
434 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
1e771e83
YS		 435 if (!force) {
436 enum page_type btype = PAGE_TYPE_OF_BIO(type);
437 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
a912b54d 438
1e771e83 439 down_read(&io->io_rwsem);
8648de2c 440 ret = __has_merged_page(io->bio, inode, page, ino);
1e771e83
YS		 441 up_read(&io->io_rwsem);
442 }
443 if (ret)
444 __f2fs_submit_merged_write(sbi, type, temp);
a912b54d
JK		 445
446 /* TODO: use HOT temp only for meta pages now. */
447 if (type >= META)
448 break;
449 }
0c3a5797
CY		 450}
451
b9109b0e 452void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
0c3a5797 453{
adcc00f7 454 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
0c3a5797
CY		 455}
456
b9109b0e 457void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 458 struct inode *inode, struct page *page,
459 nid_t ino, enum page_type type)
0c3a5797 460{
bab475c5 461 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
0c3a5797
CY		 462}
463
b9109b0e 464void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
406657dd 465{
b9109b0e
JK		 466 f2fs_submit_merged_write(sbi, DATA);
467 f2fs_submit_merged_write(sbi, NODE);
468 f2fs_submit_merged_write(sbi, META);
406657dd
CY		 469}
470
93dfe2ac
JK		 471/*
472 * Fill the locked page with data located in the block address.
771a9a71 473 * A caller needs to unlock the page on failure.
93dfe2ac 474 */
05ca3632 475int f2fs_submit_page_bio(struct f2fs_io_info *fio)
93dfe2ac 476{
93dfe2ac 477 struct bio *bio;
0b81d077
JK		 478 struct page *page = fio->encrypted_page ?
479 fio->encrypted_page : fio->page;
93dfe2ac 480
c9b60788 481 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
93770ab7
CY		 482 fio->is_por ? META_POR : (__is_meta_io(fio) ?
483 META_GENERIC : DATA_GENERIC_ENHANCE)))
10f966bb 484 return -EFSCORRUPTED;
c9b60788 485
2ace38e0 486 trace_f2fs_submit_page_bio(page, fio);
05ca3632 487 f2fs_trace_ios(fio, 0);
93dfe2ac
JK		 488
489 /* Allocate a new bio */
b757f6ed 490 bio = __bio_alloc(fio, 1);
93dfe2ac 491
09cbfeaf 492 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
93dfe2ac 493 bio_put(bio);
93dfe2ac
JK		 494 return -EFAULT;
495 }
78efac53
CY		 496
497 if (fio->io_wbc && !is_read_io(fio->op))
34e51a5e 498 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
78efac53 499
04d328de 500 bio_set_op_attrs(bio, fio->op, fio->op_flags);
93dfe2ac 501
5f9abab4
JK		 502 inc_page_count(fio->sbi, is_read_io(fio->op) ?
503 __read_io_type(page): WB_DATA_TYPE(fio->page));
4c58ed07
CY		 504
505 __submit_bio(fio->sbi, bio, fio->type);
93dfe2ac
JK		 506 return 0;
507}
508
8896cbdf
CY		 509static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
510 block_t last_blkaddr, block_t cur_blkaddr)
511{
512 if (last_blkaddr + 1 != cur_blkaddr)
513 return false;
514 return __same_bdev(sbi, cur_blkaddr, bio);
515}
516
517static bool io_type_is_mergeable(struct f2fs_bio_info *io,
518 struct f2fs_io_info *fio)
519{
520 if (io->fio.op != fio->op)
521 return false;
522 return io->fio.op_flags == fio->op_flags;
523}
524
525static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
526 struct f2fs_bio_info *io,
527 struct f2fs_io_info *fio,
528 block_t last_blkaddr,
529 block_t cur_blkaddr)
530{
c72db71e
CY		 531 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
532 unsigned int filled_blocks =
533 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
534 unsigned int io_size = F2FS_IO_SIZE(sbi);
535 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
536
537 /* IOs in bio is aligned and left space of vectors is not enough */
538 if (!(filled_blocks % io_size) && left_vecs < io_size)
539 return false;
540 }
8896cbdf
CY		 541 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
542 return false;
543 return io_type_is_mergeable(io, fio);
544}
545
8648de2c
CY		 546int f2fs_merge_page_bio(struct f2fs_io_info *fio)
547{
548 struct bio *bio = *fio->bio;
549 struct page *page = fio->encrypted_page ?
550 fio->encrypted_page : fio->page;
551
552 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
553 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
10f966bb 554 return -EFSCORRUPTED;
8648de2c
CY		 555
556 trace_f2fs_submit_page_bio(page, fio);
557 f2fs_trace_ios(fio, 0);
558
8896cbdf
CY		 559 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
560 fio->new_blkaddr)) {
8648de2c
CY		 561 __submit_bio(fio->sbi, bio, fio->type);
562 bio = NULL;
563 }
564alloc_new:
565 if (!bio) {
b757f6ed 566 bio = __bio_alloc(fio, BIO_MAX_PAGES);
8648de2c
CY		 567 bio_set_op_attrs(bio, fio->op, fio->op_flags);
568 }
569
570 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
571 __submit_bio(fio->sbi, bio, fio->type);
572 bio = NULL;
573 goto alloc_new;
574 }
575
576 if (fio->io_wbc)
9637d517 577 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
8648de2c
CY		 578
579 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
580
581 *fio->last_block = fio->new_blkaddr;
582 *fio->bio = bio;
583
584 return 0;
585}
586
587static void f2fs_submit_ipu_bio(struct f2fs_sb_info *sbi, struct bio **bio,
588 struct page *page)
589{
590 if (!bio)
591 return;
592
593 if (!__has_merged_page(*bio, NULL, page, 0))
594 return;
595
596 __submit_bio(sbi, *bio, DATA);
597 *bio = NULL;
598}
599
fe16efe6 600void f2fs_submit_page_write(struct f2fs_io_info *fio)
93dfe2ac 601{
05ca3632 602 struct f2fs_sb_info *sbi = fio->sbi;
458e6197 603 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
a912b54d 604 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
4375a336 605 struct page *bio_page;
93dfe2ac 606
b9109b0e 607 f2fs_bug_on(sbi, is_read_io(fio->op));
93dfe2ac 608
fb830fc5
CY		 609 down_write(&io->io_rwsem);
610next:
611 if (fio->in_list) {
612 spin_lock(&io->io_lock);
613 if (list_empty(&io->io_list)) {
614 spin_unlock(&io->io_lock);
fe16efe6 615 goto out;
fb830fc5
CY		 616 }
617 fio = list_first_entry(&io->io_list,
618 struct f2fs_io_info, list);
619 list_del(&fio->list);
620 spin_unlock(&io->io_lock);
621 }
93dfe2ac 622
93770ab7 623 verify_fio_blkaddr(fio);
93dfe2ac 624
36951b38
CY		 625 bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
626
ebf7c522
TM		 627 /* set submitted = true as a return value */
628 fio->submitted = true;
d68f735b 629
b9109b0e 630 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
93dfe2ac 631
8896cbdf
CY		 632 if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio,
633 io->last_block_in_bio, fio->new_blkaddr))
458e6197 634 __submit_merged_bio(io);
93dfe2ac
JK		 635alloc_new:
636 if (io->bio == NULL) {
8223ecc4
CY		 637 if (F2FS_IO_ALIGNED(sbi) &&
638 (fio->type == DATA || fio->type == NODE) &&
0a595eba 639 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
b9109b0e 640 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
fe16efe6
CY		 641 fio->retry = true;
642 goto skip;
0a595eba 643 }
b757f6ed 644 io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
458e6197 645 io->fio = *fio;
93dfe2ac
JK		 646 }
647
a912b54d 648 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
458e6197 649 __submit_merged_bio(io);
93dfe2ac
JK		 650 goto alloc_new;
651 }
652
578c6478 653 if (fio->io_wbc)
34e51a5e 654 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
578c6478 655
7a9d7548 656 io->last_block_in_bio = fio->new_blkaddr;
05ca3632 657 f2fs_trace_ios(fio, 0);
fb830fc5
CY		 658
659 trace_f2fs_submit_page_write(fio->page, fio);
fe16efe6 660skip:
fb830fc5
CY		 661 if (fio->in_list)
662 goto next;
fe16efe6 663out:
4354994f 664 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
00e09c0b 665 !f2fs_is_checkpoint_ready(sbi))
5ce80586 666 __submit_merged_bio(io);
df0f8dc0 667 up_write(&io->io_rwsem);
93dfe2ac
JK		 668}
669
95ae251f
EB		 670static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
671{
672 return fsverity_active(inode) &&
673 idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
674}
675
13ba41e3 676static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
95ae251f
EB		 677 unsigned nr_pages, unsigned op_flag,
678 pgoff_t first_idx)
13ba41e3
JK		 679{
680 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ba41e3 681 struct bio *bio;
6dbb1796
EB		 682 struct bio_post_read_ctx *ctx;
683 unsigned int post_read_steps = 0;
13ba41e3 684
d62fe971 685 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
6dbb1796 686 if (!bio)
13ba41e3 687 return ERR_PTR(-ENOMEM);
13ba41e3
JK		 688 f2fs_target_device(sbi, blkaddr, bio);
689 bio->bi_end_io = f2fs_read_end_io;
e2e59414 690 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
13ba41e3 691
6dbb1796
EB		 692 if (f2fs_encrypted_file(inode))
693 post_read_steps |= 1 << STEP_DECRYPT;
95ae251f
EB		 694
695 if (f2fs_need_verity(inode, first_idx))
696 post_read_steps |= 1 << STEP_VERITY;
697
6dbb1796
EB		 698 if (post_read_steps) {
699 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
700 if (!ctx) {
701 bio_put(bio);
702 return ERR_PTR(-ENOMEM);
703 }
704 ctx->bio = bio;
705 ctx->enabled_steps = post_read_steps;
706 bio->bi_private = ctx;
6dbb1796
EB		 707 }
708
13ba41e3
JK		 709 return bio;
710}
711
712/* This can handle encryption stuffs */
713static int f2fs_submit_page_read(struct inode *inode, struct page *page,
714 block_t blkaddr)
715{
93770ab7
CY		 716 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
717 struct bio *bio;
13ba41e3 718
95ae251f 719 bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index);
13ba41e3
JK		 720 if (IS_ERR(bio))
721 return PTR_ERR(bio);
722
0ded69f6
JK		 723 /* wait for GCed page writeback via META_MAPPING */
724 f2fs_wait_on_block_writeback(inode, blkaddr);
725
13ba41e3
JK		 726 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
727 bio_put(bio);
728 return -EFAULT;
729 }
fb7d70db 730 ClearPageError(page);
93770ab7
CY		 731 inc_page_count(sbi, F2FS_RD_DATA);
732 __submit_bio(sbi, bio, DATA);
13ba41e3
JK		 733 return 0;
734}
735
46008c6d
CY		 736static void __set_data_blkaddr(struct dnode_of_data *dn)
737{
738 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
739 __le32 *addr_array;
7a2af766
CY		 740 int base = 0;
741
742 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
743 base = get_extra_isize(dn->inode);
46008c6d
CY		 744
745 /* Get physical address of data block */
746 addr_array = blkaddr_in_node(rn);
7a2af766 747 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
46008c6d
CY		 748}
749
0a8165d7 750/*
eb47b800
JK		 751 * Lock ordering for the change of data block address:
752 * ->data_page
753 * ->node_page
754 * update block addresses in the node page
755 */
4d57b86d 756void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
eb47b800 757{
bae0ee7a 758 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 759 __set_data_blkaddr(dn);
760 if (set_page_dirty(dn->node_page))
12719ae1 761 dn->node_changed = true;
eb47b800
JK		 762}
763
f28b3434
CY		 764void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
765{
766 dn->data_blkaddr = blkaddr;
4d57b86d 767 f2fs_set_data_blkaddr(dn);
f28b3434
CY		 768 f2fs_update_extent_cache(dn);
769}
770
46008c6d 771/* dn->ofs_in_node will be returned with up-to-date last block pointer */
4d57b86d 772int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
eb47b800 773{
4081363f 774 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
0abd675e 775 int err;
eb47b800 776
46008c6d
CY		 777 if (!count)
778 return 0;
779
91942321 780 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
eb47b800 781 return -EPERM;
0abd675e
CY		 782 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
783 return err;
eb47b800 784
46008c6d
CY		 785 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
786 dn->ofs_in_node, count);
787
bae0ee7a 788 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 789
790 for (; count > 0; dn->ofs_in_node++) {
7a2af766
CY		 791 block_t blkaddr = datablock_addr(dn->inode,
792 dn->node_page, dn->ofs_in_node);
46008c6d
CY		 793 if (blkaddr == NULL_ADDR) {
794 dn->data_blkaddr = NEW_ADDR;
795 __set_data_blkaddr(dn);
796 count--;
797 }
798 }
799
800 if (set_page_dirty(dn->node_page))
801 dn->node_changed = true;
eb47b800
JK		 802 return 0;
803}
804
46008c6d 805/* Should keep dn->ofs_in_node unchanged */
4d57b86d 806int f2fs_reserve_new_block(struct dnode_of_data *dn)
46008c6d
CY		 807{
808 unsigned int ofs_in_node = dn->ofs_in_node;
809 int ret;
810
4d57b86d 811 ret = f2fs_reserve_new_blocks(dn, 1);
46008c6d
CY		 812 dn->ofs_in_node = ofs_in_node;
813 return ret;
814}
815
b600965c
HL		 816int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
817{
818 bool need_put = dn->inode_page ? false : true;
819 int err;
820
4d57b86d 821 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
b600965c
HL		 822 if (err)
823 return err;
a8865372 824
b600965c 825 if (dn->data_blkaddr == NULL_ADDR)
4d57b86d 826 err = f2fs_reserve_new_block(dn);
a8865372 827 if (err || need_put)
b600965c
HL		 828 f2fs_put_dnode(dn);
829 return err;
830}
831
759af1c9 832int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
eb47b800 833{
e15882b6 834 struct extent_info ei = {0,0,0};
759af1c9 835 struct inode *inode = dn->inode;
028a41e8 836
759af1c9
FL		 837 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
838 dn->data_blkaddr = ei.blk + index - ei.fofs;
839 return 0;
429511cd 840 }
028a41e8 841
759af1c9 842 return f2fs_reserve_block(dn, index);
eb47b800
JK		 843}
844
4d57b86d 845struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
04d328de 846 int op_flags, bool for_write)
eb47b800 847{
eb47b800
JK		 848 struct address_space *mapping = inode->i_mapping;
849 struct dnode_of_data dn;
850 struct page *page;
e15882b6 851 struct extent_info ei = {0,0,0};
eb47b800 852 int err;
4375a336 853
a56c7c6f 854 page = f2fs_grab_cache_page(mapping, index, for_write);
650495de
JK		 855 if (!page)
856 return ERR_PTR(-ENOMEM);
857
cb3bc9ee
CY		 858 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
859 dn.data_blkaddr = ei.blk + index - ei.fofs;
93770ab7
CY		 860 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
861 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 862 err = -EFSCORRUPTED;
93770ab7
CY		 863 goto put_err;
864 }
cb3bc9ee
CY		 865 goto got_it;
866 }
867
eb47b800 868 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 869 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
86531d6b
JK		 870 if (err)
871 goto put_err;
eb47b800
JK		 872 f2fs_put_dnode(&dn);
873
6bacf52f 874 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
86531d6b
JK		 875 err = -ENOENT;
876 goto put_err;
650495de 877 }
93770ab7
CY		 878 if (dn.data_blkaddr != NEW_ADDR &&
879 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
880 dn.data_blkaddr,
881 DATA_GENERIC_ENHANCE)) {
10f966bb 882 err = -EFSCORRUPTED;
93770ab7
CY		 883 goto put_err;
884 }
cb3bc9ee 885got_it:
43f3eae1
JK		 886 if (PageUptodate(page)) {
887 unlock_page(page);
eb47b800 888 return page;
43f3eae1 889 }
eb47b800 890
d59ff4df
JK		 891 /*
892 * A new dentry page is allocated but not able to be written, since its
893 * new inode page couldn't be allocated due to -ENOSPC.
894 * In such the case, its blkaddr can be remained as NEW_ADDR.
4d57b86d
CY		 895 * see, f2fs_add_link -> f2fs_get_new_data_page ->
896 * f2fs_init_inode_metadata.
d59ff4df
JK		 897 */
898 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 899 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 900 if (!PageUptodate(page))
901 SetPageUptodate(page);
43f3eae1 902 unlock_page(page);
d59ff4df
JK		 903 return page;
904 }
eb47b800 905
13ba41e3 906 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr);
393ff91f 907 if (err)
86531d6b 908 goto put_err;
43f3eae1 909 return page;
86531d6b
JK		 910
911put_err:
912 f2fs_put_page(page, 1);
913 return ERR_PTR(err);
43f3eae1
JK		 914}
915
4d57b86d 916struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
43f3eae1
JK		 917{
918 struct address_space *mapping = inode->i_mapping;
919 struct page *page;
920
921 page = find_get_page(mapping, index);
922 if (page && PageUptodate(page))
923 return page;
924 f2fs_put_page(page, 0);
925
4d57b86d 926 page = f2fs_get_read_data_page(inode, index, 0, false);
43f3eae1
JK		 927 if (IS_ERR(page))
928 return page;
929
930 if (PageUptodate(page))
931 return page;
932
933 wait_on_page_locked(page);
934 if (unlikely(!PageUptodate(page))) {
935 f2fs_put_page(page, 0);
936 return ERR_PTR(-EIO);
937 }
938 return page;
939}
940
941/*
942 * If it tries to access a hole, return an error.
943 * Because, the callers, functions in dir.c and GC, should be able to know
944 * whether this page exists or not.
945 */
4d57b86d 946struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
a56c7c6f 947 bool for_write)
43f3eae1
JK		 948{
949 struct address_space *mapping = inode->i_mapping;
950 struct page *page;
951repeat:
4d57b86d 952 page = f2fs_get_read_data_page(inode, index, 0, for_write);
43f3eae1
JK		 953 if (IS_ERR(page))
954 return page;
393ff91f 955
43f3eae1 956 /* wait for read completion */
393ff91f 957 lock_page(page);
6bacf52f 958 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 959 f2fs_put_page(page, 1);
960 goto repeat;
eb47b800 961 }
1563ac75
CY		 962 if (unlikely(!PageUptodate(page))) {
963 f2fs_put_page(page, 1);
964 return ERR_PTR(-EIO);
965 }
eb47b800
JK		 966 return page;
967}
968
0a8165d7 969/*
eb47b800
JK		 970 * Caller ensures that this data page is never allocated.
971 * A new zero-filled data page is allocated in the page cache.
39936837 972 *
4f4124d0
CY		 973 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
974 * f2fs_unlock_op().
470f00e9
CY		 975 * Note that, ipage is set only by make_empty_dir, and if any error occur,
976 * ipage should be released by this function.
eb47b800 977 */
4d57b86d 978struct page *f2fs_get_new_data_page(struct inode *inode,
a8865372 979 struct page *ipage, pgoff_t index, bool new_i_size)
eb47b800 980{
eb47b800
JK		 981 struct address_space *mapping = inode->i_mapping;
982 struct page *page;
983 struct dnode_of_data dn;
984 int err;
7612118a 985
a56c7c6f 986 page = f2fs_grab_cache_page(mapping, index, true);
470f00e9
CY		 987 if (!page) {
988 /*
989 * before exiting, we should make sure ipage will be released
990 * if any error occur.
991 */
992 f2fs_put_page(ipage, 1);
01f28610 993 return ERR_PTR(-ENOMEM);
470f00e9 994 }
eb47b800 995
a8865372 996 set_new_dnode(&dn, inode, ipage, NULL, 0);
b600965c 997 err = f2fs_reserve_block(&dn, index);
01f28610
JK		 998 if (err) {
999 f2fs_put_page(page, 1);
eb47b800 1000 return ERR_PTR(err);
a8865372 1001 }
01f28610
JK		 1002 if (!ipage)
1003 f2fs_put_dnode(&dn);
eb47b800
JK		 1004
1005 if (PageUptodate(page))
01f28610 1006 goto got_it;
eb47b800
JK		 1007
1008 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1009 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1010 if (!PageUptodate(page))
1011 SetPageUptodate(page);
eb47b800 1012 } else {
4375a336 1013 f2fs_put_page(page, 1);
a8865372 1014
7612118a
JK		 1015 /* if ipage exists, blkaddr should be NEW_ADDR */
1016 f2fs_bug_on(F2FS_I_SB(inode), ipage);
4d57b86d 1017 page = f2fs_get_lock_data_page(inode, index, true);
4375a336 1018 if (IS_ERR(page))
7612118a 1019 return page;
eb47b800 1020 }
01f28610 1021got_it:
9edcdabf 1022 if (new_i_size && i_size_read(inode) <
ee6d182f 1023 ((loff_t)(index + 1) << PAGE_SHIFT))
fc9581c8 1024 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
eb47b800
JK		 1025 return page;
1026}
1027
d5097be5 1028static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
bfad7c2d 1029{
4081363f 1030 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
bfad7c2d 1031 struct f2fs_summary sum;
bfad7c2d 1032 struct node_info ni;
6aa58d8a 1033 block_t old_blkaddr;
46008c6d 1034 blkcnt_t count = 1;
0abd675e 1035 int err;
bfad7c2d 1036
91942321 1037 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
bfad7c2d 1038 return -EPERM;
df6136ef 1039
7735730d
CY		 1040 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1041 if (err)
1042 return err;
1043
7a2af766
CY		 1044 dn->data_blkaddr = datablock_addr(dn->inode,
1045 dn->node_page, dn->ofs_in_node);
f847c699 1046 if (dn->data_blkaddr != NULL_ADDR)
df6136ef
CY		 1047 goto alloc;
1048
0abd675e
CY		 1049 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1050 return err;
bfad7c2d 1051
df6136ef 1052alloc:
bfad7c2d 1053 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
6aa58d8a
CY		 1054 old_blkaddr = dn->data_blkaddr;
1055 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
d5097be5 1056 &sum, seg_type, NULL, false);
6aa58d8a
CY		 1057 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1058 invalidate_mapping_pages(META_MAPPING(sbi),
1059 old_blkaddr, old_blkaddr);
86f35dc3 1060 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
bfad7c2d 1061
0a4daae5
JK		 1062 /*
1063 * i_size will be updated by direct_IO. Otherwise, we'll get stale
1064 * data from unwritten block via dio_read.
1065 */
bfad7c2d
JK		 1066 return 0;
1067}
1068
a7de6086 1069int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
59b802e5 1070{
b439b103 1071 struct inode *inode = file_inode(iocb->ki_filp);
5b8db7fa 1072 struct f2fs_map_blocks map;
d6d478a1 1073 int flag;
a7de6086 1074 int err = 0;
d6d478a1 1075 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
59b802e5 1076
71ad682c 1077 /* convert inline data for Direct I/O*/
d6d478a1 1078 if (direct_io) {
71ad682c
WG		 1079 err = f2fs_convert_inline_inode(inode);
1080 if (err)
1081 return err;
1082 }
1083
f9d6d059
CY		 1084 if (direct_io && allow_outplace_dio(inode, iocb, from))
1085 return 0;
1086
dc91de78
JK		 1087 if (is_inode_flag_set(inode, FI_NO_PREALLOC))
1088 return 0;
1089
0080c507 1090 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
dfd02e4d
CY		 1091 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1092 if (map.m_len > map.m_lblk)
1093 map.m_len -= map.m_lblk;
1094 else
1095 map.m_len = 0;
1096
da85985c 1097 map.m_next_pgofs = NULL;
c4020b2d 1098 map.m_next_extent = NULL;
d5097be5 1099 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1100 map.m_may_create = true;
2a340760 1101
d6d478a1 1102 if (direct_io) {
4d57b86d 1103 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
f847c699 1104 flag = f2fs_force_buffered_io(inode, iocb, from) ?
d6d478a1
CY		 1105 F2FS_GET_BLOCK_PRE_AIO :
1106 F2FS_GET_BLOCK_PRE_DIO;
1107 goto map_blocks;
d5097be5 1108 }
f2470371 1109 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
a7de6086
JK		 1110 err = f2fs_convert_inline_inode(inode);
1111 if (err)
1112 return err;
b439b103 1113 }
d6d478a1 1114 if (f2fs_has_inline_data(inode))
25006645 1115 return err;
d6d478a1
CY		 1116
1117 flag = F2FS_GET_BLOCK_PRE_AIO;
1118
1119map_blocks:
1120 err = f2fs_map_blocks(inode, &map, 1, flag);
1121 if (map.m_len > 0 && err == -ENOSPC) {
1122 if (!direct_io)
1123 set_inode_flag(inode, FI_NO_PREALLOC);
1124 err = 0;
25006645 1125 }
a7de6086 1126 return err;
59b802e5
JK		 1127}
1128
39a86958 1129void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
59c9081b
YH		 1130{
1131 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1132 if (lock)
1133 down_read(&sbi->node_change);
1134 else
1135 up_read(&sbi->node_change);
1136 } else {
1137 if (lock)
1138 f2fs_lock_op(sbi);
1139 else
1140 f2fs_unlock_op(sbi);
1141 }
1142}
1143
0a8165d7 1144/*
003a3e1d
JK		 1145 * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with
1146 * f2fs_map_blocks structure.
4f4124d0
CY		 1147 * If original data blocks are allocated, then give them to blockdev.
1148 * Otherwise,
1149 * a. preallocate requested block addresses
1150 * b. do not use extent cache for better performance
1151 * c. give the block addresses to blockdev
eb47b800 1152 */
d323d005 1153int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
e2b4e2bc 1154 int create, int flag)
eb47b800 1155{
003a3e1d 1156 unsigned int maxblocks = map->m_len;
eb47b800 1157 struct dnode_of_data dn;
f9811703 1158 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f9d6d059 1159 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
46008c6d 1160 pgoff_t pgofs, end_offset, end;
bfad7c2d 1161 int err = 0, ofs = 1;
46008c6d
CY		 1162 unsigned int ofs_in_node, last_ofs_in_node;
1163 blkcnt_t prealloc;
e15882b6 1164 struct extent_info ei = {0,0,0};
7df3a431 1165 block_t blkaddr;
c4020b2d 1166 unsigned int start_pgofs;
eb47b800 1167
dfd02e4d
CY		 1168 if (!maxblocks)
1169 return 0;
1170
003a3e1d
JK		 1171 map->m_len = 0;
1172 map->m_flags = 0;
1173
1174 /* it only supports block size == page size */
1175 pgofs = (pgoff_t)map->m_lblk;
46008c6d 1176 end = pgofs + maxblocks;
eb47b800 1177
24b84912 1178 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
f4f0b677
JZ		 1179 if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
1180 map->m_may_create)
1181 goto next_dnode;
1182
003a3e1d
JK		 1183 map->m_pblk = ei.blk + pgofs - ei.fofs;
1184 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1185 map->m_flags = F2FS_MAP_MAPPED;
c4020b2d
CY		 1186 if (map->m_next_extent)
1187 *map->m_next_extent = pgofs + map->m_len;
1e78e8bd
ST		 1188
1189 /* for hardware encryption, but to avoid potential issue in future */
1190 if (flag == F2FS_GET_BLOCK_DIO)
1191 f2fs_wait_on_block_writeback_range(inode,
1192 map->m_pblk, map->m_len);
bfad7c2d 1193 goto out;
a2e7d1bf 1194 }
bfad7c2d 1195
4fe71e88 1196next_dnode:
f9d6d059 1197 if (map->m_may_create)
59c9081b 1198 __do_map_lock(sbi, flag, true);
eb47b800
JK		 1199
1200 /* When reading holes, we need its node page */
1201 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1202 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1ec79083 1203 if (err) {
43473f96
CY		 1204 if (flag == F2FS_GET_BLOCK_BMAP)
1205 map->m_pblk = 0;
da85985c 1206 if (err == -ENOENT) {
bfad7c2d 1207 err = 0;
da85985c
CY		 1208 if (map->m_next_pgofs)
1209 *map->m_next_pgofs =
4d57b86d 1210 f2fs_get_next_page_offset(&dn, pgofs);
c4020b2d
CY		 1211 if (map->m_next_extent)
1212 *map->m_next_extent =
4d57b86d 1213 f2fs_get_next_page_offset(&dn, pgofs);
da85985c 1214 }
bfad7c2d 1215 goto unlock_out;
848753aa 1216 }
973163fc 1217
c4020b2d 1218 start_pgofs = pgofs;
46008c6d 1219 prealloc = 0;
230436b3 1220 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
81ca7350 1221 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
4fe71e88
CY		 1222
1223next_block:
7a2af766 1224 blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
4fe71e88 1225
c9b60788 1226 if (__is_valid_data_blkaddr(blkaddr) &&
93770ab7 1227 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
10f966bb 1228 err = -EFSCORRUPTED;
c9b60788
CY		 1229 goto sync_out;
1230 }
1231
93770ab7 1232 if (__is_valid_data_blkaddr(blkaddr)) {
f847c699 1233 /* use out-place-update for driect IO under LFS mode */
f9d6d059
CY		 1234 if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
1235 map->m_may_create) {
f847c699 1236 err = __allocate_data_block(&dn, map->m_seg_type);
05e36006
CY		 1237 if (err)
1238 goto sync_out;
1239 blkaddr = dn.data_blkaddr;
1240 set_inode_flag(inode, FI_APPEND_WRITE);
f847c699
CY		 1241 }
1242 } else {
973163fc 1243 if (create) {
f9811703
CY		 1244 if (unlikely(f2fs_cp_error(sbi))) {
1245 err = -EIO;
4fe71e88 1246 goto sync_out;
f9811703 1247 }
24b84912 1248 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
46008c6d
CY		 1249 if (blkaddr == NULL_ADDR) {
1250 prealloc++;
1251 last_ofs_in_node = dn.ofs_in_node;
1252 }
24b84912 1253 } else {
0a4daae5
JK		 1254 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1255 flag != F2FS_GET_BLOCK_DIO);
d5097be5
HL		 1256 err = __allocate_data_block(&dn,
1257 map->m_seg_type);
6f2d8ed6 1258 if (!err)
91942321 1259 set_inode_flag(inode, FI_APPEND_WRITE);
24b84912 1260 }
973163fc 1261 if (err)
4fe71e88 1262 goto sync_out;
3f2be043 1263 map->m_flags |= F2FS_MAP_NEW;
4fe71e88 1264 blkaddr = dn.data_blkaddr;
973163fc 1265 } else {
43473f96
CY		 1266 if (flag == F2FS_GET_BLOCK_BMAP) {
1267 map->m_pblk = 0;
1268 goto sync_out;
1269 }
c4020b2d
CY		 1270 if (flag == F2FS_GET_BLOCK_PRECACHE)
1271 goto sync_out;
da85985c
CY		 1272 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1273 blkaddr == NULL_ADDR) {
1274 if (map->m_next_pgofs)
1275 *map->m_next_pgofs = pgofs + 1;
4c2ac6a8 1276 goto sync_out;
da85985c 1277 }
f3d98e74
CY		 1278 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1279 /* for defragment case */
1280 if (map->m_next_pgofs)
1281 *map->m_next_pgofs = pgofs + 1;
4fe71e88 1282 goto sync_out;
f3d98e74 1283 }
e2b4e2bc 1284 }
e2b4e2bc 1285 }
eb47b800 1286
46008c6d
CY		 1287 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1288 goto skip;
1289
4fe71e88
CY		 1290 if (map->m_len == 0) {
1291 /* preallocated unwritten block should be mapped for fiemap. */
1292 if (blkaddr == NEW_ADDR)
1293 map->m_flags |= F2FS_MAP_UNWRITTEN;
1294 map->m_flags |= F2FS_MAP_MAPPED;
1295
1296 map->m_pblk = blkaddr;
1297 map->m_len = 1;
1298 } else if ((map->m_pblk != NEW_ADDR &&
1299 blkaddr == (map->m_pblk + ofs)) ||
b439b103 1300 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
46008c6d 1301 flag == F2FS_GET_BLOCK_PRE_DIO) {
4fe71e88
CY		 1302 ofs++;
1303 map->m_len++;
1304 } else {
1305 goto sync_out;
1306 }
bfad7c2d 1307
46008c6d 1308skip:
bfad7c2d
JK		 1309 dn.ofs_in_node++;
1310 pgofs++;
1311
46008c6d
CY		 1312 /* preallocate blocks in batch for one dnode page */
1313 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1314 (pgofs == end || dn.ofs_in_node == end_offset)) {
7df3a431 1315
46008c6d 1316 dn.ofs_in_node = ofs_in_node;
4d57b86d 1317 err = f2fs_reserve_new_blocks(&dn, prealloc);
46008c6d
CY		 1318 if (err)
1319 goto sync_out;
bfad7c2d 1320
46008c6d
CY		 1321 map->m_len += dn.ofs_in_node - ofs_in_node;
1322 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1323 err = -ENOSPC;
1324 goto sync_out;
3104af35 1325 }
46008c6d
CY		 1326 dn.ofs_in_node = end_offset;
1327 }
1328
1329 if (pgofs >= end)
1330 goto sync_out;
1331 else if (dn.ofs_in_node < end_offset)
1332 goto next_block;
1333
c4020b2d
CY		 1334 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1335 if (map->m_flags & F2FS_MAP_MAPPED) {
1336 unsigned int ofs = start_pgofs - map->m_lblk;
1337
1338 f2fs_update_extent_cache_range(&dn,
1339 start_pgofs, map->m_pblk + ofs,
1340 map->m_len - ofs);
1341 }
1342 }
1343
46008c6d
CY		 1344 f2fs_put_dnode(&dn);
1345
f9d6d059 1346 if (map->m_may_create) {
59c9081b 1347 __do_map_lock(sbi, flag, false);
6f2d8ed6 1348 f2fs_balance_fs(sbi, dn.node_changed);
eb47b800 1349 }
46008c6d 1350 goto next_dnode;
7df3a431 1351
bfad7c2d 1352sync_out:
1e78e8bd
ST		 1353
1354 /* for hardware encryption, but to avoid potential issue in future */
1355 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1356 f2fs_wait_on_block_writeback_range(inode,
1357 map->m_pblk, map->m_len);
1358
c4020b2d
CY		 1359 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1360 if (map->m_flags & F2FS_MAP_MAPPED) {
1361 unsigned int ofs = start_pgofs - map->m_lblk;
1362
1363 f2fs_update_extent_cache_range(&dn,
1364 start_pgofs, map->m_pblk + ofs,
1365 map->m_len - ofs);
1366 }
1367 if (map->m_next_extent)
1368 *map->m_next_extent = pgofs + 1;
1369 }
eb47b800 1370 f2fs_put_dnode(&dn);
bfad7c2d 1371unlock_out:
f9d6d059 1372 if (map->m_may_create) {
59c9081b 1373 __do_map_lock(sbi, flag, false);
6f2d8ed6 1374 f2fs_balance_fs(sbi, dn.node_changed);
2a340760 1375 }
bfad7c2d 1376out:
003a3e1d 1377 trace_f2fs_map_blocks(inode, map, err);
bfad7c2d 1378 return err;
eb47b800
JK		 1379}
1380
b91050a8
HL		 1381bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1382{
1383 struct f2fs_map_blocks map;
1384 block_t last_lblk;
1385 int err;
1386
1387 if (pos + len > i_size_read(inode))
1388 return false;
1389
1390 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1391 map.m_next_pgofs = NULL;
1392 map.m_next_extent = NULL;
1393 map.m_seg_type = NO_CHECK_TYPE;
f4f0b677 1394 map.m_may_create = false;
b91050a8
HL		 1395 last_lblk = F2FS_BLK_ALIGN(pos + len);
1396
1397 while (map.m_lblk < last_lblk) {
1398 map.m_len = last_lblk - map.m_lblk;
1399 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1400 if (err || map.m_len == 0)
1401 return false;
1402 map.m_lblk += map.m_len;
1403 }
1404 return true;
1405}
1406
003a3e1d 1407static int __get_data_block(struct inode *inode, sector_t iblock,
da85985c 1408 struct buffer_head *bh, int create, int flag,
f9d6d059 1409 pgoff_t *next_pgofs, int seg_type, bool may_write)
003a3e1d
JK		 1410{
1411 struct f2fs_map_blocks map;
a7de6086 1412 int err;
003a3e1d
JK		 1413
1414 map.m_lblk = iblock;
1415 map.m_len = bh->b_size >> inode->i_blkbits;
da85985c 1416 map.m_next_pgofs = next_pgofs;
c4020b2d 1417 map.m_next_extent = NULL;
d5097be5 1418 map.m_seg_type = seg_type;
f9d6d059 1419 map.m_may_create = may_write;
003a3e1d 1420
a7de6086
JK		 1421 err = f2fs_map_blocks(inode, &map, create, flag);
1422 if (!err) {
003a3e1d
JK		 1423 map_bh(bh, inode->i_sb, map.m_pblk);
1424 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
b86e3307 1425 bh->b_size = (u64)map.m_len << inode->i_blkbits;
003a3e1d 1426 }
a7de6086 1427 return err;
003a3e1d
JK		 1428}
1429
ccfb3000 1430static int get_data_block(struct inode *inode, sector_t iblock,
da85985c
CY		 1431 struct buffer_head *bh_result, int create, int flag,
1432 pgoff_t *next_pgofs)
e2b4e2bc 1433{
da85985c 1434 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1435 flag, next_pgofs,
f9d6d059
CY		 1436 NO_CHECK_TYPE, create);
1437}
1438
1439static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1440 struct buffer_head *bh_result, int create)
1441{
1442 return __get_data_block(inode, iblock, bh_result, create,
1443 F2FS_GET_BLOCK_DIO, NULL,
1444 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
75a037f3 1445 IS_SWAPFILE(inode) ? false : true);
e2b4e2bc
CY		 1446}
1447
1448static int get_data_block_dio(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1449 struct buffer_head *bh_result, int create)
1450{
e2b4e2bc 1451 return __get_data_block(inode, iblock, bh_result, create,
f9d6d059
CY		 1452 F2FS_GET_BLOCK_DIO, NULL,
1453 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1454 false);
ccfb3000
JK		 1455}
1456
e2b4e2bc 1457static int get_data_block_bmap(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1458 struct buffer_head *bh_result, int create)
1459{
179448bf 1460 /* Block number less than F2FS MAX BLOCKS */
e0afc4d6 1461 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
179448bf
YH		 1462 return -EFBIG;
1463
e2b4e2bc 1464 return __get_data_block(inode, iblock, bh_result, create,
d5097be5 1465 F2FS_GET_BLOCK_BMAP, NULL,
f9d6d059 1466 NO_CHECK_TYPE, create);
ccfb3000
JK		 1467}
1468
7f63eb77
JK		 1469static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1470{
1471 return (offset >> inode->i_blkbits);
1472}
1473
1474static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1475{
1476 return (blk << inode->i_blkbits);
1477}
1478
442a9dbd
CY		 1479static int f2fs_xattr_fiemap(struct inode *inode,
1480 struct fiemap_extent_info *fieinfo)
1481{
1482 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1483 struct page *page;
1484 struct node_info ni;
1485 __u64 phys = 0, len;
1486 __u32 flags;
1487 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1488 int err = 0;
1489
1490 if (f2fs_has_inline_xattr(inode)) {
1491 int offset;
1492
1493 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1494 inode->i_ino, false);
1495 if (!page)
1496 return -ENOMEM;
1497
7735730d
CY		 1498 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1499 if (err) {
1500 f2fs_put_page(page, 1);
1501 return err;
1502 }
442a9dbd
CY		 1503
1504 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1505 offset = offsetof(struct f2fs_inode, i_addr) +
1506 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
b323fd28 1507 get_inline_xattr_addrs(inode));
442a9dbd
CY		 1508
1509 phys += offset;
1510 len = inline_xattr_size(inode);
1511
1512 f2fs_put_page(page, 1);
1513
1514 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1515
1516 if (!xnid)
1517 flags |= FIEMAP_EXTENT_LAST;
1518
1519 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1520 if (err || err == 1)
1521 return err;
1522 }
1523
1524 if (xnid) {
1525 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1526 if (!page)
1527 return -ENOMEM;
1528
7735730d
CY		 1529 err = f2fs_get_node_info(sbi, xnid, &ni);
1530 if (err) {
1531 f2fs_put_page(page, 1);
1532 return err;
1533 }
442a9dbd
CY		 1534
1535 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1536 len = inode->i_sb->s_blocksize;
1537
1538 f2fs_put_page(page, 1);
1539
1540 flags = FIEMAP_EXTENT_LAST;
1541 }
1542
1543 if (phys)
1544 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1545
1546 return (err < 0 ? err : 0);
1547}
1548
9ab70134
JK		 1549int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1550 u64 start, u64 len)
1551{
7f63eb77
JK		 1552 struct buffer_head map_bh;
1553 sector_t start_blk, last_blk;
da85985c 1554 pgoff_t next_pgofs;
7f63eb77
JK		 1555 u64 logical = 0, phys = 0, size = 0;
1556 u32 flags = 0;
7f63eb77
JK		 1557 int ret = 0;
1558
c4020b2d
CY		 1559 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1560 ret = f2fs_precache_extents(inode);
1561 if (ret)
1562 return ret;
1563 }
1564
442a9dbd 1565 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
7f63eb77
JK		 1566 if (ret)
1567 return ret;
1568
f1b43d4c
CY		 1569 inode_lock(inode);
1570
442a9dbd
CY		 1571 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1572 ret = f2fs_xattr_fiemap(inode, fieinfo);
1573 goto out;
1574 }
1575
7975f349 1576 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
67f8cf3c
JK		 1577 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1578 if (ret != -EAGAIN)
f1b43d4c 1579 goto out;
67f8cf3c
JK		 1580 }
1581
7f63eb77
JK		 1582 if (logical_to_blk(inode, len) == 0)
1583 len = blk_to_logical(inode, 1);
1584
1585 start_blk = logical_to_blk(inode, start);
1586 last_blk = logical_to_blk(inode, start + len - 1);
9a950d52 1587
7f63eb77
JK		 1588next:
1589 memset(&map_bh, 0, sizeof(struct buffer_head));
1590 map_bh.b_size = len;
1591
e2b4e2bc 1592 ret = get_data_block(inode, start_blk, &map_bh, 0,
da85985c 1593 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
7f63eb77
JK		 1594 if (ret)
1595 goto out;
1596
1597 /* HOLE */
1598 if (!buffer_mapped(&map_bh)) {
da85985c 1599 start_blk = next_pgofs;
58736fa6
CY		 1600
1601 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
1602 F2FS_I_SB(inode)->max_file_blocks))
9a950d52 1603 goto prep_next;
58736fa6 1604
9a950d52
FL		 1605 flags |= FIEMAP_EXTENT_LAST;
1606 }
7f63eb77 1607
da5af127 1608 if (size) {
62230e0d 1609 if (IS_ENCRYPTED(inode))
da5af127
CY		 1610 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1611
9a950d52
FL		 1612 ret = fiemap_fill_next_extent(fieinfo, logical,
1613 phys, size, flags);
da5af127 1614 }
7f63eb77 1615
9a950d52
FL		 1616 if (start_blk > last_blk || ret)
1617 goto out;
7f63eb77 1618
9a950d52
FL		 1619 logical = blk_to_logical(inode, start_blk);
1620 phys = blk_to_logical(inode, map_bh.b_blocknr);
1621 size = map_bh.b_size;
1622 flags = 0;
1623 if (buffer_unwritten(&map_bh))
1624 flags = FIEMAP_EXTENT_UNWRITTEN;
7f63eb77 1625
9a950d52 1626 start_blk += logical_to_blk(inode, size);
7f63eb77 1627
9a950d52 1628prep_next:
7f63eb77
JK		 1629 cond_resched();
1630 if (fatal_signal_pending(current))
1631 ret = -EINTR;
1632 else
1633 goto next;
1634out:
1635 if (ret == 1)
1636 ret = 0;
1637
5955102c 1638 inode_unlock(inode);
7f63eb77 1639 return ret;
9ab70134
JK		 1640}
1641
95ae251f
EB		 1642static inline loff_t f2fs_readpage_limit(struct inode *inode)
1643{
1644 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1645 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1646 return inode->i_sb->s_maxbytes;
1647
1648 return i_size_read(inode);
1649}
1650
2df0ab04
CY		 1651static int f2fs_read_single_page(struct inode *inode, struct page *page,
1652 unsigned nr_pages,
1653 struct f2fs_map_blocks *map,
1654 struct bio **bio_ret,
1655 sector_t *last_block_in_bio,
1656 bool is_readahead)
1657{
1658 struct bio *bio = *bio_ret;
1659 const unsigned blkbits = inode->i_blkbits;
1660 const unsigned blocksize = 1 << blkbits;
1661 sector_t block_in_file;
1662 sector_t last_block;
1663 sector_t last_block_in_file;
1664 sector_t block_nr;
1665 int ret = 0;
1666
4969c06a 1667 block_in_file = (sector_t)page_index(page);
2df0ab04 1668 last_block = block_in_file + nr_pages;
95ae251f 1669 last_block_in_file = (f2fs_readpage_limit(inode) + blocksize - 1) >>
2df0ab04
CY		 1670 blkbits;
1671 if (last_block > last_block_in_file)
1672 last_block = last_block_in_file;
1673
1674 /* just zeroing out page which is beyond EOF */
1675 if (block_in_file >= last_block)
1676 goto zero_out;
1677 /*
1678 * Map blocks using the previous result first.
1679 */
1680 if ((map->m_flags & F2FS_MAP_MAPPED) &&
1681 block_in_file > map->m_lblk &&
1682 block_in_file < (map->m_lblk + map->m_len))
1683 goto got_it;
1684
1685 /*
1686 * Then do more f2fs_map_blocks() calls until we are
1687 * done with this page.
1688 */
1689 map->m_lblk = block_in_file;
1690 map->m_len = last_block - block_in_file;
1691
1692 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
1693 if (ret)
1694 goto out;
1695got_it:
1696 if ((map->m_flags & F2FS_MAP_MAPPED)) {
1697 block_nr = map->m_pblk + block_in_file - map->m_lblk;
1698 SetPageMappedToDisk(page);
1699
4969c06a
JK		 1700 if (!PageUptodate(page) && (!PageSwapCache(page) &&
1701 !cleancache_get_page(page))) {
2df0ab04
CY		 1702 SetPageUptodate(page);
1703 goto confused;
1704 }
1705
1706 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
93770ab7 1707 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1708 ret = -EFSCORRUPTED;
2df0ab04
CY		 1709 goto out;
1710 }
1711 } else {
1712zero_out:
1713 zero_user_segment(page, 0, PAGE_SIZE);
95ae251f
EB		 1714 if (f2fs_need_verity(inode, page->index) &&
1715 !fsverity_verify_page(page)) {
1716 ret = -EIO;
1717 goto out;
1718 }
2df0ab04
CY		 1719 if (!PageUptodate(page))
1720 SetPageUptodate(page);
1721 unlock_page(page);
1722 goto out;
1723 }
1724
1725 /*
1726 * This page will go to BIO. Do we need to send this
1727 * BIO off first?
1728 */
8896cbdf
CY		 1729 if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
1730 *last_block_in_bio, block_nr)) {
2df0ab04
CY		 1731submit_and_realloc:
1732 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1733 bio = NULL;
1734 }
1735 if (bio == NULL) {
1736 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
95ae251f 1737 is_readahead ? REQ_RAHEAD : 0, page->index);
2df0ab04
CY		 1738 if (IS_ERR(bio)) {
1739 ret = PTR_ERR(bio);
1740 bio = NULL;
1741 goto out;
1742 }
1743 }
1744
1745 /*
1746 * If the page is under writeback, we need to wait for
1747 * its completion to see the correct decrypted data.
1748 */
1749 f2fs_wait_on_block_writeback(inode, block_nr);
1750
1751 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
1752 goto submit_and_realloc;
1753
1754 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
1755 ClearPageError(page);
1756 *last_block_in_bio = block_nr;
1757 goto out;
1758confused:
1759 if (bio) {
1760 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1761 bio = NULL;
1762 }
1763 unlock_page(page);
1764out:
1765 *bio_ret = bio;
1766 return ret;
1767}
1768
f1e88660
JK		 1769/*
1770 * This function was originally taken from fs/mpage.c, and customized for f2fs.
1771 * Major change was from block_size == page_size in f2fs by default.
e2e59414
JK		 1772 *
1773 * Note that the aops->readpages() function is ONLY used for read-ahead. If
1774 * this function ever deviates from doing just read-ahead, it should either
1775 * use ->readpage() or do the necessary surgery to decouple ->readpages()
1776 * from read-ahead.
f1e88660
JK		 1777 */
1778static int f2fs_mpage_readpages(struct address_space *mapping,
1779 struct list_head *pages, struct page *page,
e2e59414 1780 unsigned nr_pages, bool is_readahead)
f1e88660
JK		 1781{
1782 struct bio *bio = NULL;
f1e88660
JK		 1783 sector_t last_block_in_bio = 0;
1784 struct inode *inode = mapping->host;
f1e88660 1785 struct f2fs_map_blocks map;
2df0ab04 1786 int ret = 0;
f1e88660
JK		 1787
1788 map.m_pblk = 0;
1789 map.m_lblk = 0;
1790 map.m_len = 0;
1791 map.m_flags = 0;
da85985c 1792 map.m_next_pgofs = NULL;
c4020b2d 1793 map.m_next_extent = NULL;
d5097be5 1794 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1795 map.m_may_create = false;
f1e88660 1796
736c0a74 1797 for (; nr_pages; nr_pages--) {
f1e88660 1798 if (pages) {
939afa94 1799 page = list_last_entry(pages, struct page, lru);
a83d50bc
KM		 1800
1801 prefetchw(&page->flags);
f1e88660
JK		 1802 list_del(&page->lru);
1803 if (add_to_page_cache_lru(page, mapping,
4969c06a 1804 page_index(page),
8a5c743e 1805 readahead_gfp_mask(mapping)))
f1e88660
JK		 1806 goto next_page;
1807 }
1808
2df0ab04
CY		 1809 ret = f2fs_read_single_page(inode, page, nr_pages, &map, &bio,
1810 &last_block_in_bio, is_readahead);
1811 if (ret) {
1812 SetPageError(page);
09cbfeaf 1813 zero_user_segment(page, 0, PAGE_SIZE);
f1e88660 1814 unlock_page(page);
f1e88660 1815 }
f1e88660
JK		 1816next_page:
1817 if (pages)
09cbfeaf 1818 put_page(page);
f1e88660
JK		 1819 }
1820 BUG_ON(pages && !list_empty(pages));
1821 if (bio)
4fc29c1a 1822 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2df0ab04 1823 return pages ? 0 : ret;
f1e88660
JK		 1824}
1825
eb47b800
JK		 1826static int f2fs_read_data_page(struct file *file, struct page *page)
1827{
4969c06a 1828 struct inode *inode = page_file_mapping(page)->host;
b3d208f9 1829 int ret = -EAGAIN;
9ffe0fb5 1830
c20e89cd
CY		 1831 trace_f2fs_readpage(page, DATA);
1832
e1c42045 1833 /* If the file has inline data, try to read it directly */
9ffe0fb5
HL		 1834 if (f2fs_has_inline_data(inode))
1835 ret = f2fs_read_inline_data(inode, page);
b3d208f9 1836 if (ret == -EAGAIN)
4969c06a
JK		 1837 ret = f2fs_mpage_readpages(page_file_mapping(page),
1838 NULL, page, 1, false);
9ffe0fb5 1839 return ret;
eb47b800
JK		 1840}
1841
1842static int f2fs_read_data_pages(struct file *file,
1843 struct address_space *mapping,
1844 struct list_head *pages, unsigned nr_pages)
1845{
71cb4aff 1846 struct inode *inode = mapping->host;
939afa94 1847 struct page *page = list_last_entry(pages, struct page, lru);
b8c29400
CY		 1848
1849 trace_f2fs_readpages(inode, page, nr_pages);
9ffe0fb5
HL		 1850
1851 /* If the file has inline data, skip readpages */
1852 if (f2fs_has_inline_data(inode))
1853 return 0;
1854
e2e59414 1855 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
eb47b800
JK		 1856}
1857
7eab0c0d
HP		 1858static int encrypt_one_page(struct f2fs_io_info *fio)
1859{
1860 struct inode *inode = fio->page->mapping->host;
6aa58d8a 1861 struct page *mpage;
7eab0c0d
HP		 1862 gfp_t gfp_flags = GFP_NOFS;
1863
1958593e 1864 if (!f2fs_encrypted_file(inode))
7eab0c0d
HP		 1865 return 0;
1866
6dbb1796 1867 /* wait for GCed page writeback via META_MAPPING */
0ded69f6 1868 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
7eab0c0d
HP		 1869
1870retry_encrypt:
53bc1d85
EB		 1871 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(fio->page,
1872 PAGE_SIZE, 0,
1873 gfp_flags);
6aa58d8a
CY		 1874 if (IS_ERR(fio->encrypted_page)) {
1875 /* flush pending IOs and wait for a while in the ENOMEM case */
1876 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
1877 f2fs_flush_merged_writes(fio->sbi);
1878 congestion_wait(BLK_RW_ASYNC, HZ/50);
1879 gfp_flags |= __GFP_NOFAIL;
1880 goto retry_encrypt;
1881 }
1882 return PTR_ERR(fio->encrypted_page);
1883 }
7eab0c0d 1884
6aa58d8a
CY		 1885 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
1886 if (mpage) {
1887 if (PageUptodate(mpage))
1888 memcpy(page_address(mpage),
1889 page_address(fio->encrypted_page), PAGE_SIZE);
1890 f2fs_put_page(mpage, 1);
7eab0c0d 1891 }
6aa58d8a 1892 return 0;
7eab0c0d
HP		 1893}
1894
bb9e3bb8
CY		 1895static inline bool check_inplace_update_policy(struct inode *inode,
1896 struct f2fs_io_info *fio)
7eab0c0d 1897{
bb9e3bb8
CY		 1898 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1899 unsigned int policy = SM_I(sbi)->ipu_policy;
7eab0c0d 1900
bb9e3bb8
CY		 1901 if (policy & (0x1 << F2FS_IPU_FORCE))
1902 return true;
4d57b86d 1903 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
bb9e3bb8
CY		 1904 return true;
1905 if (policy & (0x1 << F2FS_IPU_UTIL) &&
1906 utilization(sbi) > SM_I(sbi)->min_ipu_util)
1907 return true;
4d57b86d 1908 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
bb9e3bb8
CY		 1909 utilization(sbi) > SM_I(sbi)->min_ipu_util)
1910 return true;
1911
1912 /*
1913 * IPU for rewrite async pages
1914 */
1915 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
1916 fio && fio->op == REQ_OP_WRITE &&
1917 !(fio->op_flags & REQ_SYNC) &&
62230e0d 1918 !IS_ENCRYPTED(inode))
bb9e3bb8
CY		 1919 return true;
1920
1921 /* this is only set during fdatasync */
1922 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
1923 is_inode_flag_set(inode, FI_NEED_IPU))
1924 return true;
1925
4354994f
DR		 1926 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
1927 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
1928 return true;
1929
bb9e3bb8
CY		 1930 return false;
1931}
1932
4d57b86d 1933bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8 1934{
1ad71a27
JK		 1935 if (f2fs_is_pinned_file(inode))
1936 return true;
bb9e3bb8
CY		 1937
1938 /* if this is cold file, we should overwrite to avoid fragmentation */
1939 if (file_is_cold(inode))
1940 return true;
1941
1942 return check_inplace_update_policy(inode, fio);
1943}
1944
4d57b86d 1945bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8
CY		 1946{
1947 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1948
1949 if (test_opt(sbi, LFS))
1950 return true;
1951 if (S_ISDIR(inode->i_mode))
1952 return true;
af033b2a
CY		 1953 if (IS_NOQUOTA(inode))
1954 return true;
bb9e3bb8
CY		 1955 if (f2fs_is_atomic_file(inode))
1956 return true;
1957 if (fio) {
1958 if (is_cold_data(fio->page))
1959 return true;
1960 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
1961 return true;
4354994f
DR		 1962 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
1963 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
1964 return true;
bb9e3bb8
CY		 1965 }
1966 return false;
1967}
1968
7eab0c0d
HP		 1969static inline bool need_inplace_update(struct f2fs_io_info *fio)
1970{
1971 struct inode *inode = fio->page->mapping->host;
1972
4d57b86d 1973 if (f2fs_should_update_outplace(inode, fio))
7eab0c0d
HP		 1974 return false;
1975
4d57b86d 1976 return f2fs_should_update_inplace(inode, fio);
7eab0c0d
HP		 1977}
1978
4d57b86d 1979int f2fs_do_write_data_page(struct f2fs_io_info *fio)
eb47b800 1980{
05ca3632 1981 struct page *page = fio->page;
eb47b800 1982 struct inode *inode = page->mapping->host;
eb47b800 1983 struct dnode_of_data dn;
e959c8f5 1984 struct extent_info ei = {0,0,0};
7735730d 1985 struct node_info ni;
e959c8f5 1986 bool ipu_force = false;
eb47b800
JK		 1987 int err = 0;
1988
1989 set_new_dnode(&dn, inode, NULL, NULL, 0);
e959c8f5
HP		 1990 if (need_inplace_update(fio) &&
1991 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
1992 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
a817737e 1993
c9b60788 1994 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 1995 DATA_GENERIC_ENHANCE))
10f966bb 1996 return -EFSCORRUPTED;
c9b60788
CY		 1997
1998 ipu_force = true;
1999 fio->need_lock = LOCK_DONE;
2000 goto got_it;
e959c8f5 2001 }
279d6df2 2002
d29460e5
JK		 2003 /* Deadlock due to between page->lock and f2fs_lock_op */
2004 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2005 return -EAGAIN;
279d6df2 2006
4d57b86d 2007 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
eb47b800 2008 if (err)
279d6df2 2009 goto out;
eb47b800 2010
28bc106b 2011 fio->old_blkaddr = dn.data_blkaddr;
eb47b800
JK		 2012
2013 /* This page is already truncated */
7a9d7548 2014 if (fio->old_blkaddr == NULL_ADDR) {
2bca1e23 2015 ClearPageUptodate(page);
2baf0781 2016 clear_cold_data(page);
eb47b800 2017 goto out_writepage;
2bca1e23 2018 }
e959c8f5 2019got_it:
c9b60788
CY		 2020 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2021 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2022 DATA_GENERIC_ENHANCE)) {
10f966bb 2023 err = -EFSCORRUPTED;
c9b60788
CY		 2024 goto out_writepage;
2025 }
eb47b800
JK		 2026 /*
2027 * If current allocation needs SSR,
2028 * it had better in-place writes for updated data.
2029 */
93770ab7
CY		 2030 if (ipu_force ||
2031 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
7b525dd0 2032 need_inplace_update(fio))) {
cc15620b
JK		 2033 err = encrypt_one_page(fio);
2034 if (err)
2035 goto out_writepage;
2036
2037 set_page_writeback(page);
17c50035 2038 ClearPageError(page);
279d6df2 2039 f2fs_put_dnode(&dn);
cc15620b 2040 if (fio->need_lock == LOCK_REQ)
279d6df2 2041 f2fs_unlock_op(fio->sbi);
4d57b86d 2042 err = f2fs_inplace_write_data(fio);
6492a335
CY		 2043 if (err) {
2044 if (f2fs_encrypted_file(inode))
d2d0727b 2045 fscrypt_finalize_bounce_page(&fio->encrypted_page);
6492a335
CY		 2046 if (PageWriteback(page))
2047 end_page_writeback(page);
cd23ffa9
CY		 2048 } else {
2049 set_inode_flag(inode, FI_UPDATE_WRITE);
6492a335 2050 }
7eab0c0d 2051 trace_f2fs_do_write_data_page(fio->page, IPU);
279d6df2 2052 return err;
eb47b800 2053 }
279d6df2 2054
cc15620b
JK		 2055 if (fio->need_lock == LOCK_RETRY) {
2056 if (!f2fs_trylock_op(fio->sbi)) {
2057 err = -EAGAIN;
2058 goto out_writepage;
2059 }
2060 fio->need_lock = LOCK_REQ;
2061 }
2062
7735730d
CY		 2063 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2064 if (err)
2065 goto out_writepage;
2066
2067 fio->version = ni.version;
2068
cc15620b
JK		 2069 err = encrypt_one_page(fio);
2070 if (err)
2071 goto out_writepage;
2072
2073 set_page_writeback(page);
17c50035 2074 ClearPageError(page);
cc15620b 2075
279d6df2 2076 /* LFS mode write path */
4d57b86d 2077 f2fs_outplace_write_data(&dn, fio);
279d6df2
HP		 2078 trace_f2fs_do_write_data_page(page, OPU);
2079 set_inode_flag(inode, FI_APPEND_WRITE);
2080 if (page->index == 0)
2081 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
eb47b800
JK		 2082out_writepage:
2083 f2fs_put_dnode(&dn);
279d6df2 2084out:
cc15620b 2085 if (fio->need_lock == LOCK_REQ)
279d6df2 2086 f2fs_unlock_op(fio->sbi);
eb47b800
JK		 2087 return err;
2088}
2089
d68f735b 2090static int __write_data_page(struct page *page, bool *submitted,
8648de2c
CY		 2091 struct bio **bio,
2092 sector_t *last_block,
b0af6d49
CY		 2093 struct writeback_control *wbc,
2094 enum iostat_type io_type)
eb47b800
JK		 2095{
2096 struct inode *inode = page->mapping->host;
4081363f 2097 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
eb47b800
JK		 2098 loff_t i_size = i_size_read(inode);
2099 const pgoff_t end_index = ((unsigned long long) i_size)
09cbfeaf 2100 >> PAGE_SHIFT;
26de9b11 2101 loff_t psize = (page->index + 1) << PAGE_SHIFT;
9ffe0fb5 2102 unsigned offset = 0;
39936837 2103 bool need_balance_fs = false;
eb47b800 2104 int err = 0;
458e6197 2105 struct f2fs_io_info fio = {
05ca3632 2106 .sbi = sbi,
39d787be 2107 .ino = inode->i_ino,
458e6197 2108 .type = DATA,
04d328de 2109 .op = REQ_OP_WRITE,
7637241e 2110 .op_flags = wbc_to_write_flags(wbc),
e959c8f5 2111 .old_blkaddr = NULL_ADDR,
05ca3632 2112 .page = page,
4375a336 2113 .encrypted_page = NULL,
d68f735b 2114 .submitted = false,
cc15620b 2115 .need_lock = LOCK_RETRY,
b0af6d49 2116 .io_type = io_type,
578c6478 2117 .io_wbc = wbc,
8648de2c
CY		 2118 .bio = bio,
2119 .last_block = last_block,
458e6197 2120 };
eb47b800 2121
ecda0de3
CY		 2122 trace_f2fs_writepage(page, DATA);
2123
db198ae0
CY		 2124 /* we should bypass data pages to proceed the kworkder jobs */
2125 if (unlikely(f2fs_cp_error(sbi))) {
2126 mapping_set_error(page->mapping, -EIO);
1174abfd
CY		 2127 /*
2128 * don't drop any dirty dentry pages for keeping lastest
2129 * directory structure.
2130 */
2131 if (S_ISDIR(inode->i_mode))
2132 goto redirty_out;
db198ae0
CY		 2133 goto out;
2134 }
2135
0771fcc7
CY		 2136 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2137 goto redirty_out;
2138
95ae251f 2139 if (page->index < end_index || f2fs_verity_in_progress(inode))
39936837 2140 goto write;
eb47b800
JK		 2141
2142 /*
2143 * If the offset is out-of-range of file size,
2144 * this page does not have to be written to disk.
2145 */
09cbfeaf 2146 offset = i_size & (PAGE_SIZE - 1);
76f60268 2147 if ((page->index >= end_index + 1) || !offset)
39936837 2148 goto out;
eb47b800 2149
09cbfeaf 2150 zero_user_segment(page, offset, PAGE_SIZE);
39936837 2151write:
1e84371f
JK		 2152 if (f2fs_is_drop_cache(inode))
2153 goto out;
e6e5f561
JK		 2154 /* we should not write 0'th page having journal header */
2155 if (f2fs_is_volatile_file(inode) && (!page->index ||
2156 (!wbc->for_reclaim &&
4d57b86d 2157 f2fs_available_free_memory(sbi, BASE_CHECK))))
1e84371f 2158 goto redirty_out;
eb47b800 2159
39936837 2160 /* Dentry blocks are controlled by checkpoint */
eb47b800 2161 if (S_ISDIR(inode->i_mode)) {
cc15620b 2162 fio.need_lock = LOCK_DONE;
4d57b86d 2163 err = f2fs_do_write_data_page(&fio);
8618b881
JK		 2164 goto done;
2165 }
9ffe0fb5 2166
8618b881 2167 if (!wbc->for_reclaim)
39936837 2168 need_balance_fs = true;
7f3037a5 2169 else if (has_not_enough_free_secs(sbi, 0, 0))
39936837 2170 goto redirty_out;
ef095d19
JK		 2171 else
2172 set_inode_flag(inode, FI_HOT_DATA);
eb47b800 2173
b3d208f9 2174 err = -EAGAIN;
dd7b2333 2175 if (f2fs_has_inline_data(inode)) {
b3d208f9 2176 err = f2fs_write_inline_data(inode, page);
dd7b2333
YH		 2177 if (!err)
2178 goto out;
2179 }
279d6df2 2180
cc15620b 2181 if (err == -EAGAIN) {
4d57b86d 2182 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2183 if (err == -EAGAIN) {
2184 fio.need_lock = LOCK_REQ;
4d57b86d 2185 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2186 }
2187 }
a0d00fad 2188
eb449797
CY		 2189 if (err) {
2190 file_set_keep_isize(inode);
2191 } else {
2192 down_write(&F2FS_I(inode)->i_sem);
2193 if (F2FS_I(inode)->last_disk_size < psize)
2194 F2FS_I(inode)->last_disk_size = psize;
2195 up_write(&F2FS_I(inode)->i_sem);
2196 }
279d6df2 2197
8618b881
JK		 2198done:
2199 if (err && err != -ENOENT)
2200 goto redirty_out;
eb47b800 2201
39936837 2202out:
a7ffdbe2 2203 inode_dec_dirty_pages(inode);
2baf0781 2204 if (err) {
2bca1e23 2205 ClearPageUptodate(page);
2baf0781
CY		 2206 clear_cold_data(page);
2207 }
0c3a5797
CY		 2208
2209 if (wbc->for_reclaim) {
bab475c5 2210 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
ef095d19 2211 clear_inode_flag(inode, FI_HOT_DATA);
4d57b86d 2212 f2fs_remove_dirty_inode(inode);
d68f735b 2213 submitted = NULL;
0c3a5797
CY		 2214 }
2215
eb47b800 2216 unlock_page(page);
186857c5 2217 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
8648de2c
CY		 2218 !F2FS_I(inode)->cp_task) {
2219 f2fs_submit_ipu_bio(sbi, bio, page);
a7881893 2220 f2fs_balance_fs(sbi, need_balance_fs);
8648de2c 2221 }
0c3a5797 2222
d68f735b 2223 if (unlikely(f2fs_cp_error(sbi))) {
8648de2c 2224 f2fs_submit_ipu_bio(sbi, bio, page);
b9109b0e 2225 f2fs_submit_merged_write(sbi, DATA);
d68f735b
JK		 2226 submitted = NULL;
2227 }
2228
2229 if (submitted)
2230 *submitted = fio.submitted;
0c3a5797 2231
eb47b800
JK		 2232 return 0;
2233
eb47b800 2234redirty_out:
76f60268 2235 redirty_page_for_writepage(wbc, page);
5b19d284
JK		 2236 /*
2237 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2238 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2239 * file_write_and_wait_range() will see EIO error, which is critical
2240 * to return value of fsync() followed by atomic_write failure to user.
2241 */
2242 if (!err || wbc->for_reclaim)
0002b61b 2243 return AOP_WRITEPAGE_ACTIVATE;
b230e6ca
JK		 2244 unlock_page(page);
2245 return err;
fa9150a8
NJ		 2246}
2247
f566bae8
JK		 2248static int f2fs_write_data_page(struct page *page,
2249 struct writeback_control *wbc)
2250{
8648de2c 2251 return __write_data_page(page, NULL, NULL, NULL, wbc, FS_DATA_IO);
f566bae8
JK		 2252}
2253
8f46dcae
CY		 2254/*
2255 * This function was copied from write_cche_pages from mm/page-writeback.c.
2256 * The major change is making write step of cold data page separately from
2257 * warm/hot data page.
2258 */
2259static int f2fs_write_cache_pages(struct address_space *mapping,
b0af6d49
CY		 2260 struct writeback_control *wbc,
2261 enum iostat_type io_type)
8f46dcae
CY		 2262{
2263 int ret = 0;
2264 int done = 0;
2265 struct pagevec pvec;
c29fd0c0 2266 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
8648de2c
CY		 2267 struct bio *bio = NULL;
2268 sector_t last_block;
8f46dcae
CY		 2269 int nr_pages;
2270 pgoff_t uninitialized_var(writeback_index);
2271 pgoff_t index;
2272 pgoff_t end; /* Inclusive */
2273 pgoff_t done_index;
2274 int cycled;
2275 int range_whole = 0;
10bbd235 2276 xa_mark_t tag;
bab475c5 2277 int nwritten = 0;
8f46dcae 2278
86679820 2279 pagevec_init(&pvec);
46ae957f 2280
ef095d19
JK		 2281 if (get_dirty_pages(mapping->host) <=
2282 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2283 set_inode_flag(mapping->host, FI_HOT_DATA);
2284 else
2285 clear_inode_flag(mapping->host, FI_HOT_DATA);
2286
8f46dcae
CY		 2287 if (wbc->range_cyclic) {
2288 writeback_index = mapping->writeback_index; /* prev offset */
2289 index = writeback_index;
2290 if (index == 0)
2291 cycled = 1;
2292 else
2293 cycled = 0;
2294 end = -1;
2295 } else {
09cbfeaf
KS		 2296 index = wbc->range_start >> PAGE_SHIFT;
2297 end = wbc->range_end >> PAGE_SHIFT;
8f46dcae
CY		 2298 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2299 range_whole = 1;
2300 cycled = 1; /* ignore range_cyclic tests */
2301 }
2302 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2303 tag = PAGECACHE_TAG_TOWRITE;
2304 else
2305 tag = PAGECACHE_TAG_DIRTY;
2306retry:
2307 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2308 tag_pages_for_writeback(mapping, index, end);
2309 done_index = index;
2310 while (!done && (index <= end)) {
2311 int i;
2312
69c4f35d 2313 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
67fd707f 2314 tag);
8f46dcae
CY		 2315 if (nr_pages == 0)
2316 break;
2317
2318 for (i = 0; i < nr_pages; i++) {
2319 struct page *page = pvec.pages[i];
d68f735b 2320 bool submitted = false;
8f46dcae 2321
f8de4331 2322 /* give a priority to WB_SYNC threads */
c29fd0c0 2323 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
f8de4331
CY		 2324 wbc->sync_mode == WB_SYNC_NONE) {
2325 done = 1;
2326 break;
2327 }
2328
8f46dcae 2329 done_index = page->index;
d29460e5 2330retry_write:
8f46dcae
CY		 2331 lock_page(page);
2332
2333 if (unlikely(page->mapping != mapping)) {
2334continue_unlock:
2335 unlock_page(page);
2336 continue;
2337 }
2338
2339 if (!PageDirty(page)) {
2340 /* someone wrote it for us */
2341 goto continue_unlock;
2342 }
2343
8f46dcae 2344 if (PageWriteback(page)) {
8648de2c 2345 if (wbc->sync_mode != WB_SYNC_NONE) {
fec1d657 2346 f2fs_wait_on_page_writeback(page,
bae0ee7a 2347 DATA, true, true);
8648de2c
CY		 2348 f2fs_submit_ipu_bio(sbi, &bio, page);
2349 } else {
8f46dcae 2350 goto continue_unlock;
8648de2c 2351 }
8f46dcae
CY		 2352 }
2353
8f46dcae
CY		 2354 if (!clear_page_dirty_for_io(page))
2355 goto continue_unlock;
2356
8648de2c
CY		 2357 ret = __write_data_page(page, &submitted, &bio,
2358 &last_block, wbc, io_type);
8f46dcae 2359 if (unlikely(ret)) {
0002b61b
CY		 2360 /*
2361 * keep nr_to_write, since vfs uses this to
2362 * get # of written pages.
2363 */
2364 if (ret == AOP_WRITEPAGE_ACTIVATE) {
2365 unlock_page(page);
2366 ret = 0;
2367 continue;
d29460e5
JK		 2368 } else if (ret == -EAGAIN) {
2369 ret = 0;
2370 if (wbc->sync_mode == WB_SYNC_ALL) {
2371 cond_resched();
2372 congestion_wait(BLK_RW_ASYNC,
2373 HZ/50);
2374 goto retry_write;
2375 }
2376 continue;
0002b61b 2377 }
b230e6ca
JK		 2378 done_index = page->index + 1;
2379 done = 1;
2380 break;
d68f735b 2381 } else if (submitted) {
bab475c5 2382 nwritten++;
8f46dcae
CY		 2383 }
2384
f8de4331 2385 if (--wbc->nr_to_write <= 0 &&
687de7f1 2386 wbc->sync_mode == WB_SYNC_NONE) {
8f46dcae
CY		 2387 done = 1;
2388 break;
2389 }
2390 }
2391 pagevec_release(&pvec);
2392 cond_resched();
2393 }
2394
8f46dcae
CY		 2395 if (!cycled && !done) {
2396 cycled = 1;
2397 index = 0;
2398 end = writeback_index - 1;
2399 goto retry;
2400 }
2401 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
2402 mapping->writeback_index = done_index;
2403
bab475c5 2404 if (nwritten)
b9109b0e 2405 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
bab475c5 2406 NULL, 0, DATA);
8648de2c
CY		 2407 /* submit cached bio of IPU write */
2408 if (bio)
2409 __submit_bio(sbi, bio, DATA);
6ca56ca4 2410
8f46dcae
CY		 2411 return ret;
2412}
2413
853137ce
JK		 2414static inline bool __should_serialize_io(struct inode *inode,
2415 struct writeback_control *wbc)
2416{
2417 if (!S_ISREG(inode->i_mode))
2418 return false;
af033b2a
CY		 2419 if (IS_NOQUOTA(inode))
2420 return false;
040d2bb3
CY		 2421 /* to avoid deadlock in path of data flush */
2422 if (F2FS_I(inode)->cp_task)
2423 return false;
853137ce
JK		 2424 if (wbc->sync_mode != WB_SYNC_ALL)
2425 return true;
2426 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
2427 return true;
2428 return false;
2429}
2430
fc99fe27 2431static int __f2fs_write_data_pages(struct address_space *mapping,
b0af6d49
CY		 2432 struct writeback_control *wbc,
2433 enum iostat_type io_type)
eb47b800
JK		 2434{
2435 struct inode *inode = mapping->host;
4081363f 2436 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9dfa1baf 2437 struct blk_plug plug;
eb47b800 2438 int ret;
853137ce 2439 bool locked = false;
eb47b800 2440
cfb185a1 2441 /* deal with chardevs and other special file */
2442 if (!mapping->a_ops->writepage)
2443 return 0;
2444
6a290544
CY		 2445 /* skip writing if there is no dirty page in this inode */
2446 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
2447 return 0;
2448
0771fcc7
CY		 2449 /* during POR, we don't need to trigger writepage at all. */
2450 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2451 goto skip_write;
2452
af033b2a
CY		 2453 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
2454 wbc->sync_mode == WB_SYNC_NONE &&
a1257023 2455 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
4d57b86d 2456 f2fs_available_free_memory(sbi, DIRTY_DENTS))
a1257023
JK		 2457 goto skip_write;
2458
d323d005 2459 /* skip writing during file defragment */
91942321 2460 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
d323d005
CY		 2461 goto skip_write;
2462
d31c7c3f
YH		 2463 trace_f2fs_writepages(mapping->host, wbc, DATA);
2464
687de7f1
JK		 2465 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
2466 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0
CY		 2467 atomic_inc(&sbi->wb_sync_req[DATA]);
2468 else if (atomic_read(&sbi->wb_sync_req[DATA]))
687de7f1
JK		 2469 goto skip_write;
2470
853137ce
JK		 2471 if (__should_serialize_io(inode, wbc)) {
2472 mutex_lock(&sbi->writepages);
2473 locked = true;
2474 }
2475
9dfa1baf 2476 blk_start_plug(&plug);
b0af6d49 2477 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
9dfa1baf 2478 blk_finish_plug(&plug);
687de7f1 2479
853137ce
JK		 2480 if (locked)
2481 mutex_unlock(&sbi->writepages);
2482
687de7f1 2483 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0 2484 atomic_dec(&sbi->wb_sync_req[DATA]);
28ea6162
JK		 2485 /*
2486 * if some pages were truncated, we cannot guarantee its mapping->host
2487 * to detect pending bios.
2488 */
458e6197 2489
4d57b86d 2490 f2fs_remove_dirty_inode(inode);
eb47b800 2491 return ret;
d3baf95d
JK		 2492
2493skip_write:
a7ffdbe2 2494 wbc->pages_skipped += get_dirty_pages(inode);
d31c7c3f 2495 trace_f2fs_writepages(mapping->host, wbc, DATA);
d3baf95d 2496 return 0;
eb47b800
JK		 2497}
2498
b0af6d49
CY		 2499static int f2fs_write_data_pages(struct address_space *mapping,
2500 struct writeback_control *wbc)
2501{
2502 struct inode *inode = mapping->host;
2503
2504 return __f2fs_write_data_pages(mapping, wbc,
2505 F2FS_I(inode)->cp_task == current ?
2506 FS_CP_DATA_IO : FS_DATA_IO);
2507}
2508
3aab8f82
CY		 2509static void f2fs_write_failed(struct address_space *mapping, loff_t to)
2510{
2511 struct inode *inode = mapping->host;
819d9153 2512 loff_t i_size = i_size_read(inode);
3aab8f82 2513
95ae251f
EB		 2514 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
2515 if (to > i_size && !f2fs_verity_in_progress(inode)) {
a33c1502 2516 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
6f8d4455 2517 down_write(&F2FS_I(inode)->i_mmap_sem);
a33c1502 2518
819d9153 2519 truncate_pagecache(inode, i_size);
c42d28ce
CY		 2520 if (!IS_NOQUOTA(inode))
2521 f2fs_truncate_blocks(inode, i_size, true);
a33c1502 2522
5a3a2d83 2523 up_write(&F2FS_I(inode)->i_mmap_sem);
6f8d4455 2524 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3aab8f82
CY		 2525 }
2526}
2527
2aadac08
JK		 2528static int prepare_write_begin(struct f2fs_sb_info *sbi,
2529 struct page *page, loff_t pos, unsigned len,
2530 block_t *blk_addr, bool *node_changed)
2531{
2532 struct inode *inode = page->mapping->host;
2533 pgoff_t index = page->index;
2534 struct dnode_of_data dn;
2535 struct page *ipage;
b4d07a3e 2536 bool locked = false;
e15882b6 2537 struct extent_info ei = {0,0,0};
2aadac08 2538 int err = 0;
2866fb16 2539 int flag;
2aadac08 2540
24b84912
JK		 2541 /*
2542 * we already allocated all the blocks, so we don't need to get
2543 * the block addresses when there is no need to fill the page.
2544 */
dc91de78 2545 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
95ae251f
EB		 2546 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
2547 !f2fs_verity_in_progress(inode))
24b84912
JK		 2548 return 0;
2549
2866fb16
SY		 2550 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
2551 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
2552 flag = F2FS_GET_BLOCK_DEFAULT;
2553 else
2554 flag = F2FS_GET_BLOCK_PRE_AIO;
2555
b4d07a3e 2556 if (f2fs_has_inline_data(inode) ||
09cbfeaf 2557 (pos & PAGE_MASK) >= i_size_read(inode)) {
2866fb16 2558 __do_map_lock(sbi, flag, true);
b4d07a3e
JK		 2559 locked = true;
2560 }
2561restart:
2aadac08 2562 /* check inline_data */
4d57b86d 2563 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2aadac08
JK		 2564 if (IS_ERR(ipage)) {
2565 err = PTR_ERR(ipage);
2566 goto unlock_out;
2567 }
2568
2569 set_new_dnode(&dn, inode, ipage, ipage, 0);
2570
2571 if (f2fs_has_inline_data(inode)) {
f2470371 2572 if (pos + len <= MAX_INLINE_DATA(inode)) {
4d57b86d 2573 f2fs_do_read_inline_data(page, ipage);
91942321 2574 set_inode_flag(inode, FI_DATA_EXIST);
ab47036d
CY		 2575 if (inode->i_nlink)
2576 set_inline_node(ipage);
2aadac08
JK		 2577 } else {
2578 err = f2fs_convert_inline_page(&dn, page);
2579 if (err)
b4d07a3e
JK		 2580 goto out;
2581 if (dn.data_blkaddr == NULL_ADDR)
2582 err = f2fs_get_block(&dn, index);
2583 }
2584 } else if (locked) {
2585 err = f2fs_get_block(&dn, index);
2586 } else {
2587 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
2588 dn.data_blkaddr = ei.blk + index - ei.fofs;
2589 } else {
b4d07a3e 2590 /* hole case */
4d57b86d 2591 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
4da7bf5a 2592 if (err || dn.data_blkaddr == NULL_ADDR) {
b4d07a3e 2593 f2fs_put_dnode(&dn);
59c9081b
YH		 2594 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
2595 true);
2866fb16 2596 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
b4d07a3e
JK		 2597 locked = true;
2598 goto restart;
2599 }
2aadac08
JK		 2600 }
2601 }
b4d07a3e 2602
2aadac08
JK		 2603 /* convert_inline_page can make node_changed */
2604 *blk_addr = dn.data_blkaddr;
2605 *node_changed = dn.node_changed;
b4d07a3e 2606out:
2aadac08
JK		 2607 f2fs_put_dnode(&dn);
2608unlock_out:
b4d07a3e 2609 if (locked)
2866fb16 2610 __do_map_lock(sbi, flag, false);
2aadac08
JK		 2611 return err;
2612}
2613
eb47b800
JK		 2614static int f2fs_write_begin(struct file *file, struct address_space *mapping,
2615 loff_t pos, unsigned len, unsigned flags,
2616 struct page **pagep, void **fsdata)
2617{
2618 struct inode *inode = mapping->host;
4081363f 2619 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86531d6b 2620 struct page *page = NULL;
09cbfeaf 2621 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
a2e2e76b 2622 bool need_balance = false, drop_atomic = false;
2aadac08 2623 block_t blkaddr = NULL_ADDR;
eb47b800
JK		 2624 int err = 0;
2625
62aed044
CY		 2626 trace_f2fs_write_begin(inode, pos, len, flags);
2627
00e09c0b
CY		 2628 if (!f2fs_is_checkpoint_ready(sbi)) {
2629 err = -ENOSPC;
4354994f 2630 goto fail;
00e09c0b 2631 }
4354994f 2632
455e3a58
JK		 2633 if ((f2fs_is_atomic_file(inode) &&
2634 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
2635 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
57864ae5 2636 err = -ENOMEM;
a2e2e76b 2637 drop_atomic = true;
57864ae5
JK		 2638 goto fail;
2639 }
2640
5f727395
JK		 2641 /*
2642 * We should check this at this moment to avoid deadlock on inode page
2643 * and #0 page. The locking rule for inline_data conversion should be:
2644 * lock_page(page #0) -> lock_page(inode_page)
2645 */
2646 if (index != 0) {
2647 err = f2fs_convert_inline_inode(inode);
2648 if (err)
2649 goto fail;
2650 }
afcb7ca0 2651repeat:
86d54795
JK		 2652 /*
2653 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
2654 * wait_for_stable_page. Will wait that below with our IO control.
2655 */
01eccef7 2656 page = f2fs_pagecache_get_page(mapping, index,
86d54795 2657 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3aab8f82
CY		 2658 if (!page) {
2659 err = -ENOMEM;
2660 goto fail;
2661 }
d5f66990 2662
eb47b800
JK		 2663 *pagep = page;
2664
2aadac08
JK		 2665 err = prepare_write_begin(sbi, page, pos, len,
2666 &blkaddr, &need_balance);
9ba69cf9 2667 if (err)
2aadac08 2668 goto fail;
9ba69cf9 2669
af033b2a
CY		 2670 if (need_balance && !IS_NOQUOTA(inode) &&
2671 has_not_enough_free_secs(sbi, 0, 0)) {
2a340760 2672 unlock_page(page);
2c4db1a6 2673 f2fs_balance_fs(sbi, true);
2a340760
JK		 2674 lock_page(page);
2675 if (page->mapping != mapping) {
2676 /* The page got truncated from under us */
2677 f2fs_put_page(page, 1);
2678 goto repeat;
2679 }
2680 }
2681
bae0ee7a 2682 f2fs_wait_on_page_writeback(page, DATA, false, true);
b3d208f9 2683
649d7df2
JK		 2684 if (len == PAGE_SIZE || PageUptodate(page))
2685 return 0;
eb47b800 2686
95ae251f
EB		 2687 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
2688 !f2fs_verity_in_progress(inode)) {
746e2403
YH		 2689 zero_user_segment(page, len, PAGE_SIZE);
2690 return 0;
2691 }
2692
2aadac08 2693 if (blkaddr == NEW_ADDR) {
09cbfeaf 2694 zero_user_segment(page, 0, PAGE_SIZE);
649d7df2 2695 SetPageUptodate(page);
eb47b800 2696 } else {
93770ab7
CY		 2697 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
2698 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 2699 err = -EFSCORRUPTED;
93770ab7
CY		 2700 goto fail;
2701 }
13ba41e3
JK		 2702 err = f2fs_submit_page_read(inode, page, blkaddr);
2703 if (err)
78682f79 2704 goto fail;
d54c795b 2705
393ff91f 2706 lock_page(page);
6bacf52f 2707 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 2708 f2fs_put_page(page, 1);
2709 goto repeat;
eb47b800 2710 }
1563ac75
CY		 2711 if (unlikely(!PageUptodate(page))) {
2712 err = -EIO;
2713 goto fail;
4375a336 2714 }
eb47b800 2715 }
eb47b800 2716 return 0;
9ba69cf9 2717
3aab8f82 2718fail:
86531d6b 2719 f2fs_put_page(page, 1);
3aab8f82 2720 f2fs_write_failed(mapping, pos + len);
a2e2e76b 2721 if (drop_atomic)
4d57b86d 2722 f2fs_drop_inmem_pages_all(sbi, false);
3aab8f82 2723 return err;
eb47b800
JK		 2724}
2725
a1dd3c13
JK		 2726static int f2fs_write_end(struct file *file,
2727 struct address_space *mapping,
2728 loff_t pos, unsigned len, unsigned copied,
2729 struct page *page, void *fsdata)
2730{
2731 struct inode *inode = page->mapping->host;
2732
dfb2bf38
CY		 2733 trace_f2fs_write_end(inode, pos, len, copied);
2734
649d7df2
JK		 2735 /*
2736 * This should be come from len == PAGE_SIZE, and we expect copied
2737 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
2738 * let generic_perform_write() try to copy data again through copied=0.
2739 */
2740 if (!PageUptodate(page)) {
746e2403 2741 if (unlikely(copied != len))
649d7df2
JK		 2742 copied = 0;
2743 else
2744 SetPageUptodate(page);
2745 }
2746 if (!copied)
2747 goto unlock_out;
2748
34ba94ba 2749 set_page_dirty(page);
a1dd3c13 2750
95ae251f
EB		 2751 if (pos + copied > i_size_read(inode) &&
2752 !f2fs_verity_in_progress(inode))
fc9581c8 2753 f2fs_i_size_write(inode, pos + copied);
649d7df2 2754unlock_out:
3024c9a1 2755 f2fs_put_page(page, 1);
d0239e1b 2756 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
a1dd3c13
JK		 2757 return copied;
2758}
2759
6f673763
OS		 2760static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
2761 loff_t offset)
944fcfc1 2762{
8a56dd96
JK		 2763 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
2764 unsigned blkbits = i_blkbits;
2765 unsigned blocksize_mask = (1 << blkbits) - 1;
2766 unsigned long align = offset | iov_iter_alignment(iter);
2767 struct block_device *bdev = inode->i_sb->s_bdev;
2768
2769 if (align & blocksize_mask) {
2770 if (bdev)
2771 blkbits = blksize_bits(bdev_logical_block_size(bdev));
2772 blocksize_mask = (1 << blkbits) - 1;
2773 if (align & blocksize_mask)
2774 return -EINVAL;
2775 return 1;
2776 }
944fcfc1
JK		 2777 return 0;
2778}
2779
02b16d0a
CY		 2780static void f2fs_dio_end_io(struct bio *bio)
2781{
2782 struct f2fs_private_dio *dio = bio->bi_private;
2783
2784 dec_page_count(F2FS_I_SB(dio->inode),
2785 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
2786
2787 bio->bi_private = dio->orig_private;
2788 bio->bi_end_io = dio->orig_end_io;
2789
5222595d 2790 kvfree(dio);
02b16d0a
CY		 2791
2792 bio_endio(bio);
2793}
2794
2795static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
2796 loff_t file_offset)
2797{
2798 struct f2fs_private_dio *dio;
2799 bool write = (bio_op(bio) == REQ_OP_WRITE);
02b16d0a
CY		 2800
2801 dio = f2fs_kzalloc(F2FS_I_SB(inode),
2802 sizeof(struct f2fs_private_dio), GFP_NOFS);
8e114038 2803 if (!dio)
02b16d0a 2804 goto out;
02b16d0a
CY		 2805
2806 dio->inode = inode;
2807 dio->orig_end_io = bio->bi_end_io;
2808 dio->orig_private = bio->bi_private;
2809 dio->write = write;
2810
2811 bio->bi_end_io = f2fs_dio_end_io;
2812 bio->bi_private = dio;
2813
2814 inc_page_count(F2FS_I_SB(inode),
2815 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
2816
2817 submit_bio(bio);
2818 return;
2819out:
2820 bio->bi_status = BLK_STS_IOERR;
2821 bio_endio(bio);
2822}
2823
c8b8e32d 2824static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
eb47b800 2825{
b439b103 2826 struct address_space *mapping = iocb->ki_filp->f_mapping;
3aab8f82 2827 struct inode *inode = mapping->host;
0cdd3195 2828 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f847c699 2829 struct f2fs_inode_info *fi = F2FS_I(inode);
3aab8f82 2830 size_t count = iov_iter_count(iter);
c8b8e32d 2831 loff_t offset = iocb->ki_pos;
82e0a5aa 2832 int rw = iov_iter_rw(iter);
3aab8f82 2833 int err;
0cdd3195 2834 enum rw_hint hint = iocb->ki_hint;
63189b78 2835 int whint_mode = F2FS_OPTION(sbi).whint_mode;
f847c699 2836 bool do_opu;
944fcfc1 2837
b439b103 2838 err = check_direct_IO(inode, iter, offset);
b9d777b8 2839 if (err)
8a56dd96 2840 return err < 0 ? err : 0;
9ffe0fb5 2841
f847c699 2842 if (f2fs_force_buffered_io(inode, iocb, iter))
36abef4e 2843 return 0;
fcc85a4d 2844
f847c699
CY		 2845 do_opu = allow_outplace_dio(inode, iocb, iter);
2846
5302fb00 2847 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
70407fad 2848
0cdd3195
HL		 2849 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
2850 iocb->ki_hint = WRITE_LIFE_NOT_SET;
2851
f847c699
CY		 2852 if (iocb->ki_flags & IOCB_NOWAIT) {
2853 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
2854 iocb->ki_hint = hint;
2855 err = -EAGAIN;
2856 goto out;
2857 }
2858 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
2859 up_read(&fi->i_gc_rwsem[rw]);
b91050a8
HL		 2860 iocb->ki_hint = hint;
2861 err = -EAGAIN;
2862 goto out;
2863 }
f847c699
CY		 2864 } else {
2865 down_read(&fi->i_gc_rwsem[rw]);
2866 if (do_opu)
2867 down_read(&fi->i_gc_rwsem[READ]);
b91050a8
HL		 2868 }
2869
02b16d0a 2870 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
f9d6d059
CY		 2871 iter, rw == WRITE ? get_data_block_dio_write :
2872 get_data_block_dio, NULL, f2fs_dio_submit_bio,
02b16d0a 2873 DIO_LOCKING | DIO_SKIP_HOLES);
f847c699
CY		 2874
2875 if (do_opu)
2876 up_read(&fi->i_gc_rwsem[READ]);
2877
2878 up_read(&fi->i_gc_rwsem[rw]);
82e0a5aa
CY		 2879
2880 if (rw == WRITE) {
0cdd3195
HL		 2881 if (whint_mode == WHINT_MODE_OFF)
2882 iocb->ki_hint = hint;
b0af6d49
CY		 2883 if (err > 0) {
2884 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
2885 err);
f847c699
CY		 2886 if (!do_opu)
2887 set_inode_flag(inode, FI_UPDATE_WRITE);
b0af6d49 2888 } else if (err < 0) {
6bfc4919 2889 f2fs_write_failed(mapping, offset + count);
b0af6d49 2890 }
6bfc4919 2891 }
70407fad 2892
b91050a8 2893out:
5302fb00 2894 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
70407fad 2895
3aab8f82 2896 return err;
eb47b800
JK		 2897}
2898
487261f3
CY		 2899void f2fs_invalidate_page(struct page *page, unsigned int offset,
2900 unsigned int length)
eb47b800
JK		 2901{
2902 struct inode *inode = page->mapping->host;
487261f3 2903 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
a7ffdbe2 2904
487261f3 2905 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
09cbfeaf 2906 (offset % PAGE_SIZE || length != PAGE_SIZE))
a7ffdbe2
JK		 2907 return;
2908
487261f3 2909 if (PageDirty(page)) {
933439c8 2910 if (inode->i_ino == F2FS_META_INO(sbi)) {
487261f3 2911 dec_page_count(sbi, F2FS_DIRTY_META);
933439c8 2912 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
487261f3 2913 dec_page_count(sbi, F2FS_DIRTY_NODES);
933439c8 2914 } else {
487261f3 2915 inode_dec_dirty_pages(inode);
4d57b86d 2916 f2fs_remove_dirty_inode(inode);
933439c8 2917 }
487261f3 2918 }
decd36b6 2919
2baf0781
CY		 2920 clear_cold_data(page);
2921
decd36b6 2922 if (IS_ATOMIC_WRITTEN_PAGE(page))
4d57b86d 2923 return f2fs_drop_inmem_page(inode, page);
decd36b6 2924
240a5915 2925 f2fs_clear_page_private(page);
eb47b800
JK		 2926}
2927
487261f3 2928int f2fs_release_page(struct page *page, gfp_t wait)
eb47b800 2929{
f68daeeb
JK		 2930 /* If this is dirty page, keep PagePrivate */
2931 if (PageDirty(page))
2932 return 0;
2933
decd36b6
CY		 2934 /* This is atomic written page, keep Private */
2935 if (IS_ATOMIC_WRITTEN_PAGE(page))
2936 return 0;
2937
2baf0781 2938 clear_cold_data(page);
240a5915 2939 f2fs_clear_page_private(page);
c3850aa1 2940 return 1;
eb47b800
JK		 2941}
2942
2943static int f2fs_set_data_page_dirty(struct page *page)
2944{
4969c06a 2945 struct inode *inode = page_file_mapping(page)->host;
eb47b800 2946
26c6b887
JK		 2947 trace_f2fs_set_page_dirty(page, DATA);
2948
237c0790
JK		 2949 if (!PageUptodate(page))
2950 SetPageUptodate(page);
4969c06a
JK		 2951 if (PageSwapCache(page))
2952 return __set_page_dirty_nobuffers(page);
34ba94ba 2953
5fe45743 2954 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
decd36b6 2955 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
4d57b86d 2956 f2fs_register_inmem_page(inode, page);
decd36b6
CY		 2957 return 1;
2958 }
2959 /*
2960 * Previously, this page has been registered, we just
2961 * return here.
2962 */
2963 return 0;
34ba94ba
JK		 2964 }
2965
eb47b800 2966 if (!PageDirty(page)) {
b87078ad 2967 __set_page_dirty_nobuffers(page);
4d57b86d 2968 f2fs_update_dirty_page(inode, page);
eb47b800
JK		 2969 return 1;
2970 }
2971 return 0;
2972}
2973
c01e54b7
JK		 2974static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
2975{
454ae7e5
CY		 2976 struct inode *inode = mapping->host;
2977
1d373a0e
JK		 2978 if (f2fs_has_inline_data(inode))
2979 return 0;
2980
2981 /* make sure allocating whole blocks */
2982 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
2983 filemap_write_and_wait(mapping);
2984
e2b4e2bc 2985 return generic_block_bmap(mapping, block, get_data_block_bmap);
429511cd
CY		 2986}
2987
5b7a487c
WG		 2988#ifdef CONFIG_MIGRATION
2989#include <linux/migrate.h>
2990
2991int f2fs_migrate_page(struct address_space *mapping,
2992 struct page *newpage, struct page *page, enum migrate_mode mode)
2993{
2994 int rc, extra_count;
2995 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
2996 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
2997
2998 BUG_ON(PageWriteback(page));
2999
3000 /* migrating an atomic written page is safe with the inmem_lock hold */
ff1048e7
JK		 3001 if (atomic_written) {
3002 if (mode != MIGRATE_SYNC)
3003 return -EBUSY;
3004 if (!mutex_trylock(&fi->inmem_lock))
3005 return -EAGAIN;
3006 }
5b7a487c 3007
240a5915
CY		 3008 /* one extra reference was held for atomic_write page */
3009 extra_count = atomic_written ? 1 : 0;
5b7a487c 3010 rc = migrate_page_move_mapping(mapping, newpage,
37109694 3011 page, extra_count);
5b7a487c
WG		 3012 if (rc != MIGRATEPAGE_SUCCESS) {
3013 if (atomic_written)
3014 mutex_unlock(&fi->inmem_lock);
3015 return rc;
3016 }
3017
3018 if (atomic_written) {
3019 struct inmem_pages *cur;
3020 list_for_each_entry(cur, &fi->inmem_pages, list)
3021 if (cur->page == page) {
3022 cur->page = newpage;
3023 break;
3024 }
3025 mutex_unlock(&fi->inmem_lock);
3026 put_page(page);
3027 get_page(newpage);
3028 }
3029
240a5915
CY		 3030 if (PagePrivate(page)) {
3031 f2fs_set_page_private(newpage, page_private(page));
3032 f2fs_clear_page_private(page);
3033 }
5b7a487c 3034
2916ecc0
JG		 3035 if (mode != MIGRATE_SYNC_NO_COPY)
3036 migrate_page_copy(newpage, page);
3037 else
3038 migrate_page_states(newpage, page);
5b7a487c
WG		 3039
3040 return MIGRATEPAGE_SUCCESS;
3041}
3042#endif
3043
4969c06a
JK		 3044#ifdef CONFIG_SWAP
3045/* Copied from generic_swapfile_activate() to check any holes */
3046static int check_swap_activate(struct file *swap_file, unsigned int max)
3047{
3048 struct address_space *mapping = swap_file->f_mapping;
3049 struct inode *inode = mapping->host;
3050 unsigned blocks_per_page;
3051 unsigned long page_no;
3052 unsigned blkbits;
3053 sector_t probe_block;
3054 sector_t last_block;
3055 sector_t lowest_block = -1;
3056 sector_t highest_block = 0;
3057
3058 blkbits = inode->i_blkbits;
3059 blocks_per_page = PAGE_SIZE >> blkbits;
3060
3061 /*
3062 * Map all the blocks into the extent list. This code doesn't try
3063 * to be very smart.
3064 */
3065 probe_block = 0;
3066 page_no = 0;
3067 last_block = i_size_read(inode) >> blkbits;
3068 while ((probe_block + blocks_per_page) <= last_block && page_no < max) {
3069 unsigned block_in_page;
3070 sector_t first_block;
3071
3072 cond_resched();
3073
3074 first_block = bmap(inode, probe_block);
3075 if (first_block == 0)
3076 goto bad_bmap;
3077
3078 /*
3079 * It must be PAGE_SIZE aligned on-disk
3080 */
3081 if (first_block & (blocks_per_page - 1)) {
3082 probe_block++;
3083 goto reprobe;
3084 }
3085
3086 for (block_in_page = 1; block_in_page < blocks_per_page;
3087 block_in_page++) {
3088 sector_t block;
3089
3090 block = bmap(inode, probe_block + block_in_page);
3091 if (block == 0)
3092 goto bad_bmap;
3093 if (block != first_block + block_in_page) {
3094 /* Discontiguity */
3095 probe_block++;
3096 goto reprobe;
3097 }
3098 }
3099
3100 first_block >>= (PAGE_SHIFT - blkbits);
3101 if (page_no) { /* exclude the header page */
3102 if (first_block < lowest_block)
3103 lowest_block = first_block;
3104 if (first_block > highest_block)
3105 highest_block = first_block;
3106 }
3107
3108 page_no++;
3109 probe_block += blocks_per_page;
3110reprobe:
3111 continue;
3112 }
3113 return 0;
3114
3115bad_bmap:
3116 pr_err("swapon: swapfile has holes\n");
3117 return -EINVAL;
3118}
3119
3120static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3121 sector_t *span)
3122{
3123 struct inode *inode = file_inode(file);
3124 int ret;
3125
3126 if (!S_ISREG(inode->i_mode))
3127 return -EINVAL;
3128
3129 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3130 return -EROFS;
3131
3132 ret = f2fs_convert_inline_inode(inode);
3133 if (ret)
3134 return ret;
3135
3136 ret = check_swap_activate(file, sis->max);
3137 if (ret)
3138 return ret;
3139
3140 set_inode_flag(inode, FI_PIN_FILE);
3141 f2fs_precache_extents(inode);
3142 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3143 return 0;
3144}
3145
3146static void f2fs_swap_deactivate(struct file *file)
3147{
3148 struct inode *inode = file_inode(file);
3149
3150 clear_inode_flag(inode, FI_PIN_FILE);
3151}
3152#else
3153static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3154 sector_t *span)
3155{
3156 return -EOPNOTSUPP;
3157}
3158
3159static void f2fs_swap_deactivate(struct file *file)
3160{
3161}
3162#endif
3163
eb47b800
JK		 3164const struct address_space_operations f2fs_dblock_aops = {
3165 .readpage = f2fs_read_data_page,
3166 .readpages = f2fs_read_data_pages,
3167 .writepage = f2fs_write_data_page,
3168 .writepages = f2fs_write_data_pages,
3169 .write_begin = f2fs_write_begin,
a1dd3c13 3170 .write_end = f2fs_write_end,
eb47b800 3171 .set_page_dirty = f2fs_set_data_page_dirty,
487261f3
CY		 3172 .invalidatepage = f2fs_invalidate_page,
3173 .releasepage = f2fs_release_page,
eb47b800 3174 .direct_IO = f2fs_direct_IO,
c01e54b7 3175 .bmap = f2fs_bmap,
4969c06a
JK		 3176 .swap_activate = f2fs_swap_activate,
3177 .swap_deactivate = f2fs_swap_deactivate,
5b7a487c
WG		 3178#ifdef CONFIG_MIGRATION
3179 .migratepage = f2fs_migrate_page,
3180#endif
eb47b800 3181};
6dbb1796 3182
5ec2d99d 3183void f2fs_clear_page_cache_dirty_tag(struct page *page)
aec2f729
CY		 3184{
3185 struct address_space *mapping = page_mapping(page);
3186 unsigned long flags;
3187
3188 xa_lock_irqsave(&mapping->i_pages, flags);
5ec2d99d 3189 __xa_clear_mark(&mapping->i_pages, page_index(page),
aec2f729
CY		 3190 PAGECACHE_TAG_DIRTY);
3191 xa_unlock_irqrestore(&mapping->i_pages, flags);
3192}
3193
6dbb1796
EB		 3194int __init f2fs_init_post_read_processing(void)
3195{
95ae251f
EB		 3196 bio_post_read_ctx_cache =
3197 kmem_cache_create("f2fs_bio_post_read_ctx",
3198 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
6dbb1796
EB		 3199 if (!bio_post_read_ctx_cache)
3200 goto fail;
3201 bio_post_read_ctx_pool =
3202 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3203 bio_post_read_ctx_cache);
3204 if (!bio_post_read_ctx_pool)
3205 goto fail_free_cache;
3206 return 0;
3207
3208fail_free_cache:
3209 kmem_cache_destroy(bio_post_read_ctx_cache);
3210fail:
3211 return -ENOMEM;
3212}
3213
3214void __exit f2fs_destroy_post_read_processing(void)
3215{
3216 mempool_destroy(bio_post_read_ctx_pool);
3217 kmem_cache_destroy(bio_post_read_ctx_cache);
3218}
Michael's Linux tree.