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f2fs: remove unnecessary IS_SWAPFILE check
[linux-2.6-block.git] / fs / f2fs / data.c
CommitLineData
7c1a000d 1// SPDX-License-Identifier: GPL-2.0
0a8165d7 2/*
eb47b800
JK		 3 * fs/f2fs/data.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
eb47b800
JK		 7 */
8#include <linux/fs.h>
9#include <linux/f2fs_fs.h>
10#include <linux/buffer_head.h>
11#include <linux/mpage.h>
12#include <linux/writeback.h>
13#include <linux/backing-dev.h>
8f46dcae 14#include <linux/pagevec.h>
eb47b800
JK		 15#include <linux/blkdev.h>
16#include <linux/bio.h>
27aacd28 17#include <linux/blk-crypto.h>
4969c06a 18#include <linux/swap.h>
690e4a3e 19#include <linux/prefetch.h>
e2e40f2c 20#include <linux/uio.h>
f1e88660 21#include <linux/cleancache.h>
174cd4b1 22#include <linux/sched/signal.h>
10c5db28 23#include <linux/fiemap.h>
eb47b800
JK		 24
25#include "f2fs.h"
26#include "node.h"
27#include "segment.h"
848753aa 28#include <trace/events/f2fs.h>
eb47b800 29
6dbb1796
EB		 30#define NUM_PREALLOC_POST_READ_CTXS 128
31
32static struct kmem_cache *bio_post_read_ctx_cache;
0b20fcec 33static struct kmem_cache *bio_entry_slab;
6dbb1796 34static mempool_t *bio_post_read_ctx_pool;
f543805f
CY		 35static struct bio_set f2fs_bioset;
36
37#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
38
39int __init f2fs_init_bioset(void)
40{
41 if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
42 0, BIOSET_NEED_BVECS))
43 return -ENOMEM;
44 return 0;
45}
46
47void f2fs_destroy_bioset(void)
48{
49 bioset_exit(&f2fs_bioset);
50}
51
36951b38
CY		 52static bool __is_cp_guaranteed(struct page *page)
53{
54 struct address_space *mapping = page->mapping;
55 struct inode *inode;
56 struct f2fs_sb_info *sbi;
57
58 if (!mapping)
59 return false;
60
4c8ff709
CY		 61 if (f2fs_is_compressed_page(page))
62 return false;
63
36951b38
CY		 64 inode = mapping->host;
65 sbi = F2FS_I_SB(inode);
66
67 if (inode->i_ino == F2FS_META_INO(sbi) ||
a87aff1d 68 inode->i_ino == F2FS_NODE_INO(sbi) ||
36951b38 69 S_ISDIR(inode->i_mode) ||
e7a4feb0 70 (S_ISREG(inode->i_mode) &&
af033b2a 71 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
36951b38
CY		 72 is_cold_data(page))
73 return true;
74 return false;
75}
76
5f9abab4
JK		 77static enum count_type __read_io_type(struct page *page)
78{
4969c06a 79 struct address_space *mapping = page_file_mapping(page);
5f9abab4
JK		 80
81 if (mapping) {
82 struct inode *inode = mapping->host;
83 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
84
85 if (inode->i_ino == F2FS_META_INO(sbi))
86 return F2FS_RD_META;
87
88 if (inode->i_ino == F2FS_NODE_INO(sbi))
89 return F2FS_RD_NODE;
90 }
91 return F2FS_RD_DATA;
92}
93
6dbb1796
EB		 94/* postprocessing steps for read bios */
95enum bio_post_read_step {
7f59b277
EB		 96#ifdef CONFIG_FS_ENCRYPTION
97 STEP_DECRYPT = 1 << 0,
98#else
99 STEP_DECRYPT = 0, /* compile out the decryption-related code */
100#endif
101#ifdef CONFIG_F2FS_FS_COMPRESSION
102 STEP_DECOMPRESS = 1 << 1,
103#else
104 STEP_DECOMPRESS = 0, /* compile out the decompression-related code */
105#endif
106#ifdef CONFIG_FS_VERITY
107 STEP_VERITY = 1 << 2,
108#else
109 STEP_VERITY = 0, /* compile out the verity-related code */
110#endif
6dbb1796
EB		 111};
112
113struct bio_post_read_ctx {
114 struct bio *bio;
4c8ff709 115 struct f2fs_sb_info *sbi;
6dbb1796 116 struct work_struct work;
6dbb1796
EB		 117 unsigned int enabled_steps;
118};
119
7f59b277 120static void f2fs_finish_read_bio(struct bio *bio)
93dfe2ac 121{
6dbb1796 122 struct bio_vec *bv;
6dc4f100 123 struct bvec_iter_all iter_all;
93dfe2ac 124
7f59b277
EB		 125 /*
126 * Update and unlock the bio's pagecache pages, and put the
127 * decompression context for any compressed pages.
128 */
2b070cfe 129 bio_for_each_segment_all(bv, bio, iter_all) {
7f59b277 130 struct page *page = bv->bv_page;
6dbb1796 131
7f59b277
EB		 132 if (f2fs_is_compressed_page(page)) {
133 if (bio->bi_status)
134 f2fs_end_read_compressed_page(page, true);
135 f2fs_put_page_dic(page);
4c8ff709
CY		 136 continue;
137 }
4c8ff709 138
7f59b277 139 /* PG_error was set if decryption or verity failed. */
6dbb1796
EB		 140 if (bio->bi_status || PageError(page)) {
141 ClearPageUptodate(page);
fb7d70db
JK		 142 /* will re-read again later */
143 ClearPageError(page);
6dbb1796
EB		 144 } else {
145 SetPageUptodate(page);
146 }
5f9abab4 147 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
6dbb1796
EB		 148 unlock_page(page);
149 }
79bbefb1 150
7f59b277
EB		 151 if (bio->bi_private)
152 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
153 bio_put(bio);
4c8ff709 154}
4c8ff709 155
7f59b277 156static void f2fs_verify_bio(struct work_struct *work)
6dbb1796
EB		 157{
158 struct bio_post_read_ctx *ctx =
159 container_of(work, struct bio_post_read_ctx, work);
644c8c92 160 struct bio *bio = ctx->bio;
7f59b277 161 bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS);
644c8c92
EB		 162
163 /*
164 * fsverity_verify_bio() may call readpages() again, and while verity
7f59b277
EB		 165 * will be disabled for this, decryption and/or decompression may still
166 * be needed, resulting in another bio_post_read_ctx being allocated.
167 * So to prevent deadlocks we need to release the current ctx to the
168 * mempool first. This assumes that verity is the last post-read step.
644c8c92
EB		 169 */
170 mempool_free(ctx, bio_post_read_ctx_pool);
171 bio->bi_private = NULL;
6dbb1796 172
7f59b277
EB		 173 /*
174 * Verify the bio's pages with fs-verity. Exclude compressed pages,
175 * as those were handled separately by f2fs_end_read_compressed_page().
176 */
177 if (may_have_compressed_pages) {
178 struct bio_vec *bv;
179 struct bvec_iter_all iter_all;
180
181 bio_for_each_segment_all(bv, bio, iter_all) {
182 struct page *page = bv->bv_page;
183
184 if (!f2fs_is_compressed_page(page) &&
185 !PageError(page) && !fsverity_verify_page(page))
186 SetPageError(page);
187 }
188 } else {
189 fsverity_verify_bio(bio);
4c8ff709 190 }
6dbb1796 191
7f59b277 192 f2fs_finish_read_bio(bio);
6dbb1796
EB		 193}
194
7f59b277
EB		 195/*
196 * If the bio's data needs to be verified with fs-verity, then enqueue the
197 * verity work for the bio. Otherwise finish the bio now.
198 *
199 * Note that to avoid deadlocks, the verity work can't be done on the
200 * decryption/decompression workqueue. This is because verifying the data pages
201 * can involve reading verity metadata pages from the file, and these verity
202 * metadata pages may be encrypted and/or compressed.
203 */
204static void f2fs_verify_and_finish_bio(struct bio *bio)
95ae251f 205{
7f59b277 206 struct bio_post_read_ctx *ctx = bio->bi_private;
4c8ff709 207
7f59b277
EB		 208 if (ctx && (ctx->enabled_steps & STEP_VERITY)) {
209 INIT_WORK(&ctx->work, f2fs_verify_bio);
4c8ff709 210 fsverity_enqueue_verify_work(&ctx->work);
7f59b277
EB		 211 } else {
212 f2fs_finish_read_bio(bio);
4c8ff709 213 }
4c8ff709 214}
95ae251f 215
7f59b277
EB		 216/*
217 * Handle STEP_DECOMPRESS by decompressing any compressed clusters whose last
218 * remaining page was read by @ctx->bio.
219 *
220 * Note that a bio may span clusters (even a mix of compressed and uncompressed
221 * clusters) or be for just part of a cluster. STEP_DECOMPRESS just indicates
222 * that the bio includes at least one compressed page. The actual decompression
223 * is done on a per-cluster basis, not a per-bio basis.
224 */
225static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx)
6dbb1796 226{
7f59b277
EB		 227 struct bio_vec *bv;
228 struct bvec_iter_all iter_all;
229 bool all_compressed = true;
4c8ff709 230
7f59b277
EB		 231 bio_for_each_segment_all(bv, ctx->bio, iter_all) {
232 struct page *page = bv->bv_page;
4c8ff709 233
7f59b277
EB		 234 /* PG_error was set if decryption failed. */
235 if (f2fs_is_compressed_page(page))
236 f2fs_end_read_compressed_page(page, PageError(page));
237 else
238 all_compressed = false;
6dbb1796 239 }
4c8ff709 240
7f59b277
EB		 241 /*
242 * Optimization: if all the bio's pages are compressed, then scheduling
243 * the per-bio verity work is unnecessary, as verity will be fully
244 * handled at the compression cluster level.
245 */
246 if (all_compressed)
247 ctx->enabled_steps &= ~STEP_VERITY;
6dbb1796
EB		 248}
249
7f59b277 250static void f2fs_post_read_work(struct work_struct *work)
6dbb1796 251{
7f59b277
EB		 252 struct bio_post_read_ctx *ctx =
253 container_of(work, struct bio_post_read_ctx, work);
254
255 if (ctx->enabled_steps & STEP_DECRYPT)
256 fscrypt_decrypt_bio(ctx->bio);
257
258 if (ctx->enabled_steps & STEP_DECOMPRESS)
259 f2fs_handle_step_decompress(ctx);
260
261 f2fs_verify_and_finish_bio(ctx->bio);
6dbb1796
EB		 262}
263
264static void f2fs_read_end_io(struct bio *bio)
265{
c45d6002 266 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
7f59b277 267 struct bio_post_read_ctx *ctx = bio->bi_private;
c45d6002
CY		 268
269 if (time_to_inject(sbi, FAULT_READ_IO)) {
270 f2fs_show_injection_info(sbi, FAULT_READ_IO);
4e4cbee9 271 bio->bi_status = BLK_STS_IOERR;
55523519 272 }
8b038c70 273
7f59b277
EB		 274 if (bio->bi_status) {
275 f2fs_finish_read_bio(bio);
6dbb1796 276 return;
f1e88660 277 }
6dbb1796 278
7f59b277
EB		 279 if (ctx && (ctx->enabled_steps & (STEP_DECRYPT | STEP_DECOMPRESS))) {
280 INIT_WORK(&ctx->work, f2fs_post_read_work);
281 queue_work(ctx->sbi->post_read_wq, &ctx->work);
282 } else {
283 f2fs_verify_and_finish_bio(bio);
284 }
f1e88660
JK		 285}
286
4246a0b6 287static void f2fs_write_end_io(struct bio *bio)
93dfe2ac 288{
1b1f559f 289 struct f2fs_sb_info *sbi = bio->bi_private;
f568849e 290 struct bio_vec *bvec;
6dc4f100 291 struct bvec_iter_all iter_all;
93dfe2ac 292
6f5c2ed0 293 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
c45d6002 294 f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
6f5c2ed0
CY		 295 bio->bi_status = BLK_STS_IOERR;
296 }
297
2b070cfe 298 bio_for_each_segment_all(bvec, bio, iter_all) {
93dfe2ac 299 struct page *page = bvec->bv_page;
36951b38 300 enum count_type type = WB_DATA_TYPE(page);
93dfe2ac 301
0a595eba
JK		 302 if (IS_DUMMY_WRITTEN_PAGE(page)) {
303 set_page_private(page, (unsigned long)NULL);
304 ClearPagePrivate(page);
305 unlock_page(page);
306 mempool_free(page, sbi->write_io_dummy);
307
4e4cbee9 308 if (unlikely(bio->bi_status))
0a595eba
JK		 309 f2fs_stop_checkpoint(sbi, true);
310 continue;
311 }
312
d2d0727b 313 fscrypt_finalize_bounce_page(&page);
4375a336 314
4c8ff709
CY		 315#ifdef CONFIG_F2FS_FS_COMPRESSION
316 if (f2fs_is_compressed_page(page)) {
317 f2fs_compress_write_end_io(bio, page);
318 continue;
319 }
320#endif
321
4e4cbee9 322 if (unlikely(bio->bi_status)) {
5114a97a 323 mapping_set_error(page->mapping, -EIO);
b1ca321d
JK		 324 if (type == F2FS_WB_CP_DATA)
325 f2fs_stop_checkpoint(sbi, true);
93dfe2ac 326 }
7dff55d2
YH		 327
328 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
329 page->index != nid_of_node(page));
330
36951b38 331 dec_page_count(sbi, type);
50fa53ec
CY		 332 if (f2fs_in_warm_node_list(sbi, page))
333 f2fs_del_fsync_node_entry(sbi, page);
36951b38 334 clear_cold_data(page);
93dfe2ac 335 end_page_writeback(page);
f568849e 336 }
36951b38 337 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
f5730184 338 wq_has_sleeper(&sbi->cp_wait))
93dfe2ac
JK		 339 wake_up(&sbi->cp_wait);
340
341 bio_put(bio);
342}
343
3c62be17
JK		 344struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
345 block_t blk_addr, struct bio *bio)
346{
347 struct block_device *bdev = sbi->sb->s_bdev;
348 int i;
349
0916878d
DLM		 350 if (f2fs_is_multi_device(sbi)) {
351 for (i = 0; i < sbi->s_ndevs; i++) {
352 if (FDEV(i).start_blk <= blk_addr &&
353 FDEV(i).end_blk >= blk_addr) {
354 blk_addr -= FDEV(i).start_blk;
355 bdev = FDEV(i).bdev;
356 break;
357 }
3c62be17
JK		 358 }
359 }
360 if (bio) {
74d46992 361 bio_set_dev(bio, bdev);
3c62be17
JK		 362 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
363 }
364 return bdev;
365}
366
367int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
368{
369 int i;
370
0916878d
DLM		 371 if (!f2fs_is_multi_device(sbi))
372 return 0;
373
3c62be17
JK		 374 for (i = 0; i < sbi->s_ndevs; i++)
375 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
376 return i;
377 return 0;
378}
379
b757f6ed 380static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
940a6d34 381{
b757f6ed 382 struct f2fs_sb_info *sbi = fio->sbi;
940a6d34
GZ		 383 struct bio *bio;
384
67883ade 385 bio = bio_alloc_bioset(GFP_NOIO, npages, &f2fs_bioset);
940a6d34 386
b757f6ed
CY		 387 f2fs_target_device(sbi, fio->new_blkaddr, bio);
388 if (is_read_io(fio->op)) {
0cdd3195
HL		 389 bio->bi_end_io = f2fs_read_end_io;
390 bio->bi_private = NULL;
391 } else {
392 bio->bi_end_io = f2fs_write_end_io;
393 bio->bi_private = sbi;
b757f6ed
CY		 394 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
395 fio->type, fio->temp);
0cdd3195 396 }
b757f6ed
CY		 397 if (fio->io_wbc)
398 wbc_init_bio(fio->io_wbc, bio);
940a6d34
GZ		 399
400 return bio;
401}
402
27aacd28
ST		 403static void f2fs_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode,
404 pgoff_t first_idx,
405 const struct f2fs_io_info *fio,
406 gfp_t gfp_mask)
407{
408 /*
409 * The f2fs garbage collector sets ->encrypted_page when it wants to
410 * read/write raw data without encryption.
411 */
412 if (!fio || !fio->encrypted_page)
413 fscrypt_set_bio_crypt_ctx(bio, inode, first_idx, gfp_mask);
414}
415
416static bool f2fs_crypt_mergeable_bio(struct bio *bio, const struct inode *inode,
417 pgoff_t next_idx,
418 const struct f2fs_io_info *fio)
419{
420 /*
421 * The f2fs garbage collector sets ->encrypted_page when it wants to
422 * read/write raw data without encryption.
423 */
424 if (fio && fio->encrypted_page)
425 return !bio_has_crypt_ctx(bio);
426
427 return fscrypt_mergeable_bio(bio, inode, next_idx);
428}
429
4fc29c1a
LT		 430static inline void __submit_bio(struct f2fs_sb_info *sbi,
431 struct bio *bio, enum page_type type)
f5730184 432{
4fc29c1a 433 if (!is_read_io(bio_op(bio))) {
0a595eba
JK		 434 unsigned int start;
435
0a595eba
JK		 436 if (type != DATA && type != NODE)
437 goto submit_io;
438
b0332a0f 439 if (f2fs_lfs_mode(sbi) && current->plug)
3bb09a0e
TY		 440 blk_finish_plug(current->plug);
441
39f71b7e 442 if (!F2FS_IO_ALIGNED(sbi))
8223ecc4
CY		 443 goto submit_io;
444
0a595eba
JK		 445 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
446 start %= F2FS_IO_SIZE(sbi);
447
448 if (start == 0)
449 goto submit_io;
450
451 /* fill dummy pages */
452 for (; start < F2FS_IO_SIZE(sbi); start++) {
453 struct page *page =
454 mempool_alloc(sbi->write_io_dummy,
bc73a4b2 455 GFP_NOIO | __GFP_NOFAIL);
0a595eba
JK		 456 f2fs_bug_on(sbi, !page);
457
bc73a4b2 458 zero_user_segment(page, 0, PAGE_SIZE);
0a595eba 459 SetPagePrivate(page);
e90027d2 460 set_page_private(page, DUMMY_WRITTEN_PAGE);
0a595eba
JK		 461 lock_page(page);
462 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
463 f2fs_bug_on(sbi, 1);
464 }
465 /*
466 * In the NODE case, we lose next block address chain. So, we
467 * need to do checkpoint in f2fs_sync_file.
468 */
469 if (type == NODE)
470 set_sbi_flag(sbi, SBI_NEED_CP);
19a5f5e2 471 }
0a595eba 472submit_io:
554b5125
JK		 473 if (is_read_io(bio_op(bio)))
474 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
475 else
476 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
4e49ea4a 477 submit_bio(bio);
f5730184
JK		 478}
479
4c8ff709
CY		 480void f2fs_submit_bio(struct f2fs_sb_info *sbi,
481 struct bio *bio, enum page_type type)
482{
483 __submit_bio(sbi, bio, type);
484}
485
32b6aba8 486static void __attach_io_flag(struct f2fs_io_info *fio)
da9953b7
JK		 487{
488 struct f2fs_sb_info *sbi = fio->sbi;
489 unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
32b6aba8
JK		 490 unsigned int io_flag, fua_flag, meta_flag;
491
492 if (fio->type == DATA)
493 io_flag = sbi->data_io_flag;
494 else if (fio->type == NODE)
495 io_flag = sbi->node_io_flag;
496 else
497 return;
498
499 fua_flag = io_flag & temp_mask;
500 meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
501
da9953b7 502 /*
32b6aba8 503 * data/node io flag bits per temp:
da9953b7
JK		 504 * REQ_META | REQ_FUA |
505 * 5 | 4 | 3 | 2 | 1 | 0 |
506 * Cold | Warm | Hot | Cold | Warm | Hot |
507 */
da9953b7
JK		 508 if ((1 << fio->temp) & meta_flag)
509 fio->op_flags |= REQ_META;
510 if ((1 << fio->temp) & fua_flag)
511 fio->op_flags |= REQ_FUA;
512}
513
458e6197 514static void __submit_merged_bio(struct f2fs_bio_info *io)
93dfe2ac 515{
458e6197 516 struct f2fs_io_info *fio = &io->fio;
93dfe2ac
JK		 517
518 if (!io->bio)
519 return;
520
32b6aba8 521 __attach_io_flag(fio);
554b5125
JK		 522 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
523
04d328de 524 if (is_read_io(fio->op))
554b5125 525 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
6a8f8ca5 526 else
554b5125 527 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
04d328de 528
4fc29c1a 529 __submit_bio(io->sbi, io->bio, fio->type);
93dfe2ac
JK		 530 io->bio = NULL;
531}
532
8648de2c 533static bool __has_merged_page(struct bio *bio, struct inode *inode,
bab475c5 534 struct page *page, nid_t ino)
0fd785eb 535{
0fd785eb 536 struct bio_vec *bvec;
6dc4f100 537 struct bvec_iter_all iter_all;
0fd785eb 538
8648de2c 539 if (!bio)
0fd785eb 540 return false;
0c3a5797 541
bab475c5 542 if (!inode && !page && !ino)
0c3a5797 543 return true;
0fd785eb 544
8648de2c 545 bio_for_each_segment_all(bvec, bio, iter_all) {
4c8ff709 546 struct page *target = bvec->bv_page;
0fd785eb 547
4c8ff709 548 if (fscrypt_is_bounce_page(target)) {
d2d0727b 549 target = fscrypt_pagecache_page(target);
4c8ff709
CY		 550 if (IS_ERR(target))
551 continue;
552 }
553 if (f2fs_is_compressed_page(target)) {
554 target = f2fs_compress_control_page(target);
555 if (IS_ERR(target))
556 continue;
557 }
0fd785eb 558
0c3a5797
CY		 559 if (inode && inode == target->mapping->host)
560 return true;
bab475c5
CY		 561 if (page && page == target)
562 return true;
0c3a5797 563 if (ino && ino == ino_of_node(target))
0fd785eb 564 return true;
0fd785eb
CY		 565 }
566
0fd785eb
CY		 567 return false;
568}
569
b9109b0e 570static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
a912b54d 571 enum page_type type, enum temp_type temp)
93dfe2ac
JK		 572{
573 enum page_type btype = PAGE_TYPE_OF_BIO(type);
a912b54d 574 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
93dfe2ac 575
df0f8dc0 576 down_write(&io->io_rwsem);
458e6197
JK		 577
578 /* change META to META_FLUSH in the checkpoint procedure */
579 if (type >= META_FLUSH) {
580 io->fio.type = META_FLUSH;
04d328de 581 io->fio.op = REQ_OP_WRITE;
3adc5fcb 582 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
70fd7614 583 if (!test_opt(sbi, NOBARRIER))
7f54f51f 584 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
458e6197
JK		 585 }
586 __submit_merged_bio(io);
df0f8dc0 587 up_write(&io->io_rwsem);
93dfe2ac
JK		 588}
589
a912b54d 590static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 591 struct inode *inode, struct page *page,
592 nid_t ino, enum page_type type, bool force)
0c3a5797 593{
a912b54d 594 enum temp_type temp;
1e771e83 595 bool ret = true;
a912b54d
JK		 596
597 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
1e771e83
YS		 598 if (!force) {
599 enum page_type btype = PAGE_TYPE_OF_BIO(type);
600 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
a912b54d 601
1e771e83 602 down_read(&io->io_rwsem);
8648de2c 603 ret = __has_merged_page(io->bio, inode, page, ino);
1e771e83
YS		 604 up_read(&io->io_rwsem);
605 }
606 if (ret)
607 __f2fs_submit_merged_write(sbi, type, temp);
a912b54d
JK		 608
609 /* TODO: use HOT temp only for meta pages now. */
610 if (type >= META)
611 break;
612 }
0c3a5797
CY		 613}
614
b9109b0e 615void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
0c3a5797 616{
adcc00f7 617 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
0c3a5797
CY		 618}
619
b9109b0e 620void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
bab475c5
CY		 621 struct inode *inode, struct page *page,
622 nid_t ino, enum page_type type)
0c3a5797 623{
bab475c5 624 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
0c3a5797
CY		 625}
626
b9109b0e 627void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
406657dd 628{
b9109b0e
JK		 629 f2fs_submit_merged_write(sbi, DATA);
630 f2fs_submit_merged_write(sbi, NODE);
631 f2fs_submit_merged_write(sbi, META);
406657dd
CY		 632}
633
93dfe2ac
JK		 634/*
635 * Fill the locked page with data located in the block address.
771a9a71 636 * A caller needs to unlock the page on failure.
93dfe2ac 637 */
05ca3632 638int f2fs_submit_page_bio(struct f2fs_io_info *fio)
93dfe2ac 639{
93dfe2ac 640 struct bio *bio;
0b81d077
JK		 641 struct page *page = fio->encrypted_page ?
642 fio->encrypted_page : fio->page;
93dfe2ac 643
c9b60788 644 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
93770ab7
CY		 645 fio->is_por ? META_POR : (__is_meta_io(fio) ?
646 META_GENERIC : DATA_GENERIC_ENHANCE)))
10f966bb 647 return -EFSCORRUPTED;
c9b60788 648
2ace38e0 649 trace_f2fs_submit_page_bio(page, fio);
93dfe2ac
JK		 650
651 /* Allocate a new bio */
b757f6ed 652 bio = __bio_alloc(fio, 1);
93dfe2ac 653
27aacd28
ST		 654 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
655 fio->page->index, fio, GFP_NOIO);
656
09cbfeaf 657 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
93dfe2ac 658 bio_put(bio);
93dfe2ac
JK		 659 return -EFAULT;
660 }
78efac53
CY		 661
662 if (fio->io_wbc && !is_read_io(fio->op))
34e51a5e 663 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
78efac53 664
b7b911d5 665 __attach_io_flag(fio);
04d328de 666 bio_set_op_attrs(bio, fio->op, fio->op_flags);
93dfe2ac 667
5f9abab4
JK		 668 inc_page_count(fio->sbi, is_read_io(fio->op) ?
669 __read_io_type(page): WB_DATA_TYPE(fio->page));
4c58ed07
CY		 670
671 __submit_bio(fio->sbi, bio, fio->type);
93dfe2ac
JK		 672 return 0;
673}
674
8896cbdf
CY		 675static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
676 block_t last_blkaddr, block_t cur_blkaddr)
677{
10208567
JK		 678 if (unlikely(sbi->max_io_bytes &&
679 bio->bi_iter.bi_size >= sbi->max_io_bytes))
680 return false;
8896cbdf
CY		 681 if (last_blkaddr + 1 != cur_blkaddr)
682 return false;
309dca30 683 return bio->bi_bdev == f2fs_target_device(sbi, cur_blkaddr, NULL);
8896cbdf
CY		 684}
685
686static bool io_type_is_mergeable(struct f2fs_bio_info *io,
687 struct f2fs_io_info *fio)
688{
689 if (io->fio.op != fio->op)
690 return false;
691 return io->fio.op_flags == fio->op_flags;
692}
693
694static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
695 struct f2fs_bio_info *io,
696 struct f2fs_io_info *fio,
697 block_t last_blkaddr,
698 block_t cur_blkaddr)
699{
c72db71e
CY		 700 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
701 unsigned int filled_blocks =
702 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
703 unsigned int io_size = F2FS_IO_SIZE(sbi);
704 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
705
706 /* IOs in bio is aligned and left space of vectors is not enough */
707 if (!(filled_blocks % io_size) && left_vecs < io_size)
708 return false;
709 }
8896cbdf
CY		 710 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
711 return false;
712 return io_type_is_mergeable(io, fio);
713}
714
0b20fcec
CY		 715static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
716 struct page *page, enum temp_type temp)
717{
718 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
719 struct bio_entry *be;
720
721 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
722 be->bio = bio;
723 bio_get(bio);
724
725 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
726 f2fs_bug_on(sbi, 1);
727
728 down_write(&io->bio_list_lock);
729 list_add_tail(&be->list, &io->bio_list);
730 up_write(&io->bio_list_lock);
731}
732
733static void del_bio_entry(struct bio_entry *be)
734{
735 list_del(&be->list);
736 kmem_cache_free(bio_entry_slab, be);
737}
738
27aacd28 739static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio,
0b20fcec
CY		 740 struct page *page)
741{
27aacd28 742 struct f2fs_sb_info *sbi = fio->sbi;
0b20fcec
CY		 743 enum temp_type temp;
744 bool found = false;
745 int ret = -EAGAIN;
746
747 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
748 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
749 struct list_head *head = &io->bio_list;
750 struct bio_entry *be;
751
752 down_write(&io->bio_list_lock);
753 list_for_each_entry(be, head, list) {
754 if (be->bio != *bio)
755 continue;
756
757 found = true;
758
27aacd28
ST		 759 f2fs_bug_on(sbi, !page_is_mergeable(sbi, *bio,
760 *fio->last_block,
761 fio->new_blkaddr));
762 if (f2fs_crypt_mergeable_bio(*bio,
763 fio->page->mapping->host,
764 fio->page->index, fio) &&
765 bio_add_page(*bio, page, PAGE_SIZE, 0) ==
766 PAGE_SIZE) {
0b20fcec
CY		 767 ret = 0;
768 break;
769 }
770
27aacd28 771 /* page can't be merged into bio; submit the bio */
0b20fcec
CY		 772 del_bio_entry(be);
773 __submit_bio(sbi, *bio, DATA);
774 break;
775 }
776 up_write(&io->bio_list_lock);
777 }
778
779 if (ret) {
780 bio_put(*bio);
781 *bio = NULL;
782 }
783
784 return ret;
785}
786
787void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
788 struct bio **bio, struct page *page)
789{
790 enum temp_type temp;
791 bool found = false;
792 struct bio *target = bio ? *bio : NULL;
793
794 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
795 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
796 struct list_head *head = &io->bio_list;
797 struct bio_entry *be;
798
799 if (list_empty(head))
800 continue;
801
802 down_read(&io->bio_list_lock);
803 list_for_each_entry(be, head, list) {
804 if (target)
805 found = (target == be->bio);
806 else
807 found = __has_merged_page(be->bio, NULL,
808 page, 0);
809 if (found)
810 break;
811 }
812 up_read(&io->bio_list_lock);
813
814 if (!found)
815 continue;
816
817 found = false;
818
819 down_write(&io->bio_list_lock);
820 list_for_each_entry(be, head, list) {
821 if (target)
822 found = (target == be->bio);
823 else
824 found = __has_merged_page(be->bio, NULL,
825 page, 0);
826 if (found) {
827 target = be->bio;
828 del_bio_entry(be);
829 break;
830 }
831 }
832 up_write(&io->bio_list_lock);
833 }
834
835 if (found)
836 __submit_bio(sbi, target, DATA);
837 if (bio && *bio) {
838 bio_put(*bio);
839 *bio = NULL;
840 }
841}
842
8648de2c
CY		 843int f2fs_merge_page_bio(struct f2fs_io_info *fio)
844{
845 struct bio *bio = *fio->bio;
846 struct page *page = fio->encrypted_page ?
847 fio->encrypted_page : fio->page;
848
849 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
850 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
10f966bb 851 return -EFSCORRUPTED;
8648de2c
CY		 852
853 trace_f2fs_submit_page_bio(page, fio);
8648de2c 854
8896cbdf 855 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
0b20fcec
CY		 856 fio->new_blkaddr))
857 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
8648de2c
CY		 858alloc_new:
859 if (!bio) {
b757f6ed 860 bio = __bio_alloc(fio, BIO_MAX_PAGES);
b7b911d5 861 __attach_io_flag(fio);
27aacd28
ST		 862 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
863 fio->page->index, fio, GFP_NOIO);
8648de2c 864 bio_set_op_attrs(bio, fio->op, fio->op_flags);
8648de2c 865
0b20fcec
CY		 866 add_bio_entry(fio->sbi, bio, page, fio->temp);
867 } else {
27aacd28 868 if (add_ipu_page(fio, &bio, page))
0b20fcec 869 goto alloc_new;
8648de2c
CY		 870 }
871
872 if (fio->io_wbc)
9637d517 873 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
8648de2c
CY		 874
875 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
876
877 *fio->last_block = fio->new_blkaddr;
878 *fio->bio = bio;
879
880 return 0;
881}
882
fe16efe6 883void f2fs_submit_page_write(struct f2fs_io_info *fio)
93dfe2ac 884{
05ca3632 885 struct f2fs_sb_info *sbi = fio->sbi;
458e6197 886 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
a912b54d 887 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
4375a336 888 struct page *bio_page;
93dfe2ac 889
b9109b0e 890 f2fs_bug_on(sbi, is_read_io(fio->op));
93dfe2ac 891
fb830fc5
CY		 892 down_write(&io->io_rwsem);
893next:
894 if (fio->in_list) {
895 spin_lock(&io->io_lock);
896 if (list_empty(&io->io_list)) {
897 spin_unlock(&io->io_lock);
fe16efe6 898 goto out;
fb830fc5
CY		 899 }
900 fio = list_first_entry(&io->io_list,
901 struct f2fs_io_info, list);
902 list_del(&fio->list);
903 spin_unlock(&io->io_lock);
904 }
93dfe2ac 905
93770ab7 906 verify_fio_blkaddr(fio);
93dfe2ac 907
4c8ff709
CY		 908 if (fio->encrypted_page)
909 bio_page = fio->encrypted_page;
910 else if (fio->compressed_page)
911 bio_page = fio->compressed_page;
912 else
913 bio_page = fio->page;
36951b38 914
ebf7c522
TM		 915 /* set submitted = true as a return value */
916 fio->submitted = true;
d68f735b 917
b9109b0e 918 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
93dfe2ac 919
27aacd28
ST		 920 if (io->bio &&
921 (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio,
922 fio->new_blkaddr) ||
923 !f2fs_crypt_mergeable_bio(io->bio, fio->page->mapping->host,
924 bio_page->index, fio)))
458e6197 925 __submit_merged_bio(io);
93dfe2ac
JK		 926alloc_new:
927 if (io->bio == NULL) {
8223ecc4
CY		 928 if (F2FS_IO_ALIGNED(sbi) &&
929 (fio->type == DATA || fio->type == NODE) &&
0a595eba 930 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
b9109b0e 931 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
fe16efe6
CY		 932 fio->retry = true;
933 goto skip;
0a595eba 934 }
b757f6ed 935 io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
27aacd28
ST		 936 f2fs_set_bio_crypt_ctx(io->bio, fio->page->mapping->host,
937 bio_page->index, fio, GFP_NOIO);
458e6197 938 io->fio = *fio;
93dfe2ac
JK		 939 }
940
a912b54d 941 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
458e6197 942 __submit_merged_bio(io);
93dfe2ac
JK		 943 goto alloc_new;
944 }
945
578c6478 946 if (fio->io_wbc)
34e51a5e 947 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
578c6478 948
7a9d7548 949 io->last_block_in_bio = fio->new_blkaddr;
fb830fc5
CY		 950
951 trace_f2fs_submit_page_write(fio->page, fio);
fe16efe6 952skip:
fb830fc5
CY		 953 if (fio->in_list)
954 goto next;
fe16efe6 955out:
4354994f 956 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
00e09c0b 957 !f2fs_is_checkpoint_ready(sbi))
5ce80586 958 __submit_merged_bio(io);
df0f8dc0 959 up_write(&io->io_rwsem);
93dfe2ac
JK		 960}
961
13ba41e3 962static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
95ae251f 963 unsigned nr_pages, unsigned op_flag,
7f59b277 964 pgoff_t first_idx, bool for_write)
13ba41e3
JK		 965{
966 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
13ba41e3 967 struct bio *bio;
6dbb1796
EB		 968 struct bio_post_read_ctx *ctx;
969 unsigned int post_read_steps = 0;
13ba41e3 970
67883ade 971 bio = bio_alloc_bioset(for_write ? GFP_NOIO : GFP_KERNEL,
5f7136db 972 bio_max_segs(nr_pages), &f2fs_bioset);
6dbb1796 973 if (!bio)
13ba41e3 974 return ERR_PTR(-ENOMEM);
27aacd28
ST		 975
976 f2fs_set_bio_crypt_ctx(bio, inode, first_idx, NULL, GFP_NOFS);
977
13ba41e3
JK		 978 f2fs_target_device(sbi, blkaddr, bio);
979 bio->bi_end_io = f2fs_read_end_io;
e2e59414 980 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
13ba41e3 981
27aacd28 982 if (fscrypt_inode_uses_fs_layer_crypto(inode))
7f59b277 983 post_read_steps |= STEP_DECRYPT;
95ae251f 984
7f59b277
EB		 985 if (f2fs_need_verity(inode, first_idx))
986 post_read_steps |= STEP_VERITY;
987
988 /*
989 * STEP_DECOMPRESS is handled specially, since a compressed file might
990 * contain both compressed and uncompressed clusters. We'll allocate a
991 * bio_post_read_ctx if the file is compressed, but the caller is
992 * responsible for enabling STEP_DECOMPRESS if it's actually needed.
993 */
994
995 if (post_read_steps || f2fs_compressed_file(inode)) {
e8ce5749 996 /* Due to the mempool, this never fails. */
6dbb1796 997 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
6dbb1796 998 ctx->bio = bio;
4c8ff709 999 ctx->sbi = sbi;
6dbb1796
EB		 1000 ctx->enabled_steps = post_read_steps;
1001 bio->bi_private = ctx;
6dbb1796
EB		 1002 }
1003
13ba41e3
JK		 1004 return bio;
1005}
1006
1007/* This can handle encryption stuffs */
1008static int f2fs_submit_page_read(struct inode *inode, struct page *page,
b7973091 1009 block_t blkaddr, int op_flags, bool for_write)
13ba41e3 1010{
93770ab7
CY		 1011 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1012 struct bio *bio;
13ba41e3 1013
b7973091 1014 bio = f2fs_grab_read_bio(inode, blkaddr, 1, op_flags,
7f59b277 1015 page->index, for_write);
13ba41e3
JK		 1016 if (IS_ERR(bio))
1017 return PTR_ERR(bio);
1018
0ded69f6
JK		 1019 /* wait for GCed page writeback via META_MAPPING */
1020 f2fs_wait_on_block_writeback(inode, blkaddr);
1021
13ba41e3
JK		 1022 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1023 bio_put(bio);
1024 return -EFAULT;
1025 }
fb7d70db 1026 ClearPageError(page);
93770ab7 1027 inc_page_count(sbi, F2FS_RD_DATA);
8b83ac81 1028 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
93770ab7 1029 __submit_bio(sbi, bio, DATA);
13ba41e3
JK		 1030 return 0;
1031}
1032
46008c6d
CY		 1033static void __set_data_blkaddr(struct dnode_of_data *dn)
1034{
1035 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
1036 __le32 *addr_array;
7a2af766
CY		 1037 int base = 0;
1038
1039 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
1040 base = get_extra_isize(dn->inode);
46008c6d
CY		 1041
1042 /* Get physical address of data block */
1043 addr_array = blkaddr_in_node(rn);
7a2af766 1044 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
46008c6d
CY		 1045}
1046
0a8165d7 1047/*
eb47b800
JK		 1048 * Lock ordering for the change of data block address:
1049 * ->data_page
1050 * ->node_page
1051 * update block addresses in the node page
1052 */
4d57b86d 1053void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
eb47b800 1054{
bae0ee7a 1055 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1056 __set_data_blkaddr(dn);
1057 if (set_page_dirty(dn->node_page))
12719ae1 1058 dn->node_changed = true;
eb47b800
JK		 1059}
1060
f28b3434
CY		 1061void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
1062{
1063 dn->data_blkaddr = blkaddr;
4d57b86d 1064 f2fs_set_data_blkaddr(dn);
f28b3434
CY		 1065 f2fs_update_extent_cache(dn);
1066}
1067
46008c6d 1068/* dn->ofs_in_node will be returned with up-to-date last block pointer */
4d57b86d 1069int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
eb47b800 1070{
4081363f 1071 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
0abd675e 1072 int err;
eb47b800 1073
46008c6d
CY		 1074 if (!count)
1075 return 0;
1076
91942321 1077 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
eb47b800 1078 return -EPERM;
0abd675e
CY		 1079 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1080 return err;
eb47b800 1081
46008c6d
CY		 1082 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
1083 dn->ofs_in_node, count);
1084
bae0ee7a 1085 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
46008c6d
CY		 1086
1087 for (; count > 0; dn->ofs_in_node++) {
a2ced1ce 1088 block_t blkaddr = f2fs_data_blkaddr(dn);
46008c6d
CY		 1089 if (blkaddr == NULL_ADDR) {
1090 dn->data_blkaddr = NEW_ADDR;
1091 __set_data_blkaddr(dn);
1092 count--;
1093 }
1094 }
1095
1096 if (set_page_dirty(dn->node_page))
1097 dn->node_changed = true;
eb47b800
JK		 1098 return 0;
1099}
1100
46008c6d 1101/* Should keep dn->ofs_in_node unchanged */
4d57b86d 1102int f2fs_reserve_new_block(struct dnode_of_data *dn)
46008c6d
CY		 1103{
1104 unsigned int ofs_in_node = dn->ofs_in_node;
1105 int ret;
1106
4d57b86d 1107 ret = f2fs_reserve_new_blocks(dn, 1);
46008c6d
CY		 1108 dn->ofs_in_node = ofs_in_node;
1109 return ret;
1110}
1111
b600965c
HL		 1112int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
1113{
1114 bool need_put = dn->inode_page ? false : true;
1115 int err;
1116
4d57b86d 1117 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
b600965c
HL		 1118 if (err)
1119 return err;
a8865372 1120
b600965c 1121 if (dn->data_blkaddr == NULL_ADDR)
4d57b86d 1122 err = f2fs_reserve_new_block(dn);
a8865372 1123 if (err || need_put)
b600965c
HL		 1124 f2fs_put_dnode(dn);
1125 return err;
1126}
1127
759af1c9 1128int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
eb47b800 1129{
a87aff1d 1130 struct extent_info ei = {0, 0, 0};
759af1c9 1131 struct inode *inode = dn->inode;
028a41e8 1132
759af1c9
FL		 1133 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1134 dn->data_blkaddr = ei.blk + index - ei.fofs;
1135 return 0;
429511cd 1136 }
028a41e8 1137
759af1c9 1138 return f2fs_reserve_block(dn, index);
eb47b800
JK		 1139}
1140
4d57b86d 1141struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
04d328de 1142 int op_flags, bool for_write)
eb47b800 1143{
eb47b800
JK		 1144 struct address_space *mapping = inode->i_mapping;
1145 struct dnode_of_data dn;
1146 struct page *page;
e15882b6 1147 struct extent_info ei = {0,0,0};
eb47b800 1148 int err;
4375a336 1149
a56c7c6f 1150 page = f2fs_grab_cache_page(mapping, index, for_write);
650495de
JK		 1151 if (!page)
1152 return ERR_PTR(-ENOMEM);
1153
cb3bc9ee
CY		 1154 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1155 dn.data_blkaddr = ei.blk + index - ei.fofs;
93770ab7
CY		 1156 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1157 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 1158 err = -EFSCORRUPTED;
93770ab7
CY		 1159 goto put_err;
1160 }
cb3bc9ee
CY		 1161 goto got_it;
1162 }
1163
eb47b800 1164 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1165 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
86531d6b
JK		 1166 if (err)
1167 goto put_err;
eb47b800
JK		 1168 f2fs_put_dnode(&dn);
1169
6bacf52f 1170 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
86531d6b
JK		 1171 err = -ENOENT;
1172 goto put_err;
650495de 1173 }
93770ab7
CY		 1174 if (dn.data_blkaddr != NEW_ADDR &&
1175 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1176 dn.data_blkaddr,
1177 DATA_GENERIC_ENHANCE)) {
10f966bb 1178 err = -EFSCORRUPTED;
93770ab7
CY		 1179 goto put_err;
1180 }
cb3bc9ee 1181got_it:
43f3eae1
JK		 1182 if (PageUptodate(page)) {
1183 unlock_page(page);
eb47b800 1184 return page;
43f3eae1 1185 }
eb47b800 1186
d59ff4df
JK		 1187 /*
1188 * A new dentry page is allocated but not able to be written, since its
1189 * new inode page couldn't be allocated due to -ENOSPC.
1190 * In such the case, its blkaddr can be remained as NEW_ADDR.
4d57b86d
CY		 1191 * see, f2fs_add_link -> f2fs_get_new_data_page ->
1192 * f2fs_init_inode_metadata.
d59ff4df
JK		 1193 */
1194 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1195 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1196 if (!PageUptodate(page))
1197 SetPageUptodate(page);
43f3eae1 1198 unlock_page(page);
d59ff4df
JK		 1199 return page;
1200 }
eb47b800 1201
b7973091
JY		 1202 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr,
1203 op_flags, for_write);
393ff91f 1204 if (err)
86531d6b 1205 goto put_err;
43f3eae1 1206 return page;
86531d6b
JK		 1207
1208put_err:
1209 f2fs_put_page(page, 1);
1210 return ERR_PTR(err);
43f3eae1
JK		 1211}
1212
4d57b86d 1213struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
43f3eae1
JK		 1214{
1215 struct address_space *mapping = inode->i_mapping;
1216 struct page *page;
1217
1218 page = find_get_page(mapping, index);
1219 if (page && PageUptodate(page))
1220 return page;
1221 f2fs_put_page(page, 0);
1222
4d57b86d 1223 page = f2fs_get_read_data_page(inode, index, 0, false);
43f3eae1
JK		 1224 if (IS_ERR(page))
1225 return page;
1226
1227 if (PageUptodate(page))
1228 return page;
1229
1230 wait_on_page_locked(page);
1231 if (unlikely(!PageUptodate(page))) {
1232 f2fs_put_page(page, 0);
1233 return ERR_PTR(-EIO);
1234 }
1235 return page;
1236}
1237
1238/*
1239 * If it tries to access a hole, return an error.
1240 * Because, the callers, functions in dir.c and GC, should be able to know
1241 * whether this page exists or not.
1242 */
4d57b86d 1243struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
a56c7c6f 1244 bool for_write)
43f3eae1
JK		 1245{
1246 struct address_space *mapping = inode->i_mapping;
1247 struct page *page;
1248repeat:
4d57b86d 1249 page = f2fs_get_read_data_page(inode, index, 0, for_write);
43f3eae1
JK		 1250 if (IS_ERR(page))
1251 return page;
393ff91f 1252
43f3eae1 1253 /* wait for read completion */
393ff91f 1254 lock_page(page);
6bacf52f 1255 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 1256 f2fs_put_page(page, 1);
1257 goto repeat;
eb47b800 1258 }
1563ac75
CY		 1259 if (unlikely(!PageUptodate(page))) {
1260 f2fs_put_page(page, 1);
1261 return ERR_PTR(-EIO);
1262 }
eb47b800
JK		 1263 return page;
1264}
1265
0a8165d7 1266/*
eb47b800
JK		 1267 * Caller ensures that this data page is never allocated.
1268 * A new zero-filled data page is allocated in the page cache.
39936837 1269 *
4f4124d0
CY		 1270 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
1271 * f2fs_unlock_op().
470f00e9
CY		 1272 * Note that, ipage is set only by make_empty_dir, and if any error occur,
1273 * ipage should be released by this function.
eb47b800 1274 */
4d57b86d 1275struct page *f2fs_get_new_data_page(struct inode *inode,
a8865372 1276 struct page *ipage, pgoff_t index, bool new_i_size)
eb47b800 1277{
eb47b800
JK		 1278 struct address_space *mapping = inode->i_mapping;
1279 struct page *page;
1280 struct dnode_of_data dn;
1281 int err;
7612118a 1282
a56c7c6f 1283 page = f2fs_grab_cache_page(mapping, index, true);
470f00e9
CY		 1284 if (!page) {
1285 /*
1286 * before exiting, we should make sure ipage will be released
1287 * if any error occur.
1288 */
1289 f2fs_put_page(ipage, 1);
01f28610 1290 return ERR_PTR(-ENOMEM);
470f00e9 1291 }
eb47b800 1292
a8865372 1293 set_new_dnode(&dn, inode, ipage, NULL, 0);
b600965c 1294 err = f2fs_reserve_block(&dn, index);
01f28610
JK		 1295 if (err) {
1296 f2fs_put_page(page, 1);
eb47b800 1297 return ERR_PTR(err);
a8865372 1298 }
01f28610
JK		 1299 if (!ipage)
1300 f2fs_put_dnode(&dn);
eb47b800
JK		 1301
1302 if (PageUptodate(page))
01f28610 1303 goto got_it;
eb47b800
JK		 1304
1305 if (dn.data_blkaddr == NEW_ADDR) {
09cbfeaf 1306 zero_user_segment(page, 0, PAGE_SIZE);
237c0790
JK		 1307 if (!PageUptodate(page))
1308 SetPageUptodate(page);
eb47b800 1309 } else {
4375a336 1310 f2fs_put_page(page, 1);
a8865372 1311
7612118a
JK		 1312 /* if ipage exists, blkaddr should be NEW_ADDR */
1313 f2fs_bug_on(F2FS_I_SB(inode), ipage);
4d57b86d 1314 page = f2fs_get_lock_data_page(inode, index, true);
4375a336 1315 if (IS_ERR(page))
7612118a 1316 return page;
eb47b800 1317 }
01f28610 1318got_it:
9edcdabf 1319 if (new_i_size && i_size_read(inode) <
ee6d182f 1320 ((loff_t)(index + 1) << PAGE_SHIFT))
fc9581c8 1321 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
eb47b800
JK		 1322 return page;
1323}
1324
d5097be5 1325static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
bfad7c2d 1326{
4081363f 1327 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
bfad7c2d 1328 struct f2fs_summary sum;
bfad7c2d 1329 struct node_info ni;
6aa58d8a 1330 block_t old_blkaddr;
46008c6d 1331 blkcnt_t count = 1;
0abd675e 1332 int err;
bfad7c2d 1333
91942321 1334 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
bfad7c2d 1335 return -EPERM;
df6136ef 1336
7735730d
CY		 1337 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1338 if (err)
1339 return err;
1340
a2ced1ce 1341 dn->data_blkaddr = f2fs_data_blkaddr(dn);
f847c699 1342 if (dn->data_blkaddr != NULL_ADDR)
df6136ef
CY		 1343 goto alloc;
1344
0abd675e
CY		 1345 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1346 return err;
bfad7c2d 1347
df6136ef 1348alloc:
bfad7c2d 1349 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
6aa58d8a
CY		 1350 old_blkaddr = dn->data_blkaddr;
1351 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
093749e2 1352 &sum, seg_type, NULL);
6aa58d8a
CY		 1353 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1354 invalidate_mapping_pages(META_MAPPING(sbi),
1355 old_blkaddr, old_blkaddr);
86f35dc3 1356 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
bfad7c2d 1357
0a4daae5
JK		 1358 /*
1359 * i_size will be updated by direct_IO. Otherwise, we'll get stale
1360 * data from unwritten block via dio_read.
1361 */
bfad7c2d
JK		 1362 return 0;
1363}
1364
a7de6086 1365int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
59b802e5 1366{
b439b103 1367 struct inode *inode = file_inode(iocb->ki_filp);
5b8db7fa 1368 struct f2fs_map_blocks map;
d6d478a1 1369 int flag;
a7de6086 1370 int err = 0;
d6d478a1 1371 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
59b802e5 1372
0080c507 1373 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
dfd02e4d
CY		 1374 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1375 if (map.m_len > map.m_lblk)
1376 map.m_len -= map.m_lblk;
1377 else
1378 map.m_len = 0;
1379
da85985c 1380 map.m_next_pgofs = NULL;
c4020b2d 1381 map.m_next_extent = NULL;
d5097be5 1382 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 1383 map.m_may_create = true;
2a340760 1384
d6d478a1 1385 if (direct_io) {
4d57b86d 1386 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
f847c699 1387 flag = f2fs_force_buffered_io(inode, iocb, from) ?
d6d478a1
CY		 1388 F2FS_GET_BLOCK_PRE_AIO :
1389 F2FS_GET_BLOCK_PRE_DIO;
1390 goto map_blocks;
d5097be5 1391 }
f2470371 1392 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
a7de6086
JK		 1393 err = f2fs_convert_inline_inode(inode);
1394 if (err)
1395 return err;
b439b103 1396 }
d6d478a1 1397 if (f2fs_has_inline_data(inode))
25006645 1398 return err;
d6d478a1
CY		 1399
1400 flag = F2FS_GET_BLOCK_PRE_AIO;
1401
1402map_blocks:
1403 err = f2fs_map_blocks(inode, &map, 1, flag);
1404 if (map.m_len > 0 && err == -ENOSPC) {
1405 if (!direct_io)
1406 set_inode_flag(inode, FI_NO_PREALLOC);
1407 err = 0;
25006645 1408 }
a7de6086 1409 return err;
59b802e5
JK		 1410}
1411
0ef81833 1412void f2fs_do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
59c9081b
YH		 1413{
1414 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1415 if (lock)
1416 down_read(&sbi->node_change);
1417 else
1418 up_read(&sbi->node_change);
1419 } else {
1420 if (lock)
1421 f2fs_lock_op(sbi);
1422 else
1423 f2fs_unlock_op(sbi);
1424 }
1425}
1426
0a8165d7 1427/*
7a88ddb5
CY		 1428 * f2fs_map_blocks() tries to find or build mapping relationship which
1429 * maps continuous logical blocks to physical blocks, and return such
1430 * info via f2fs_map_blocks structure.
eb47b800 1431 */
d323d005 1432int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
e2b4e2bc 1433 int create, int flag)
eb47b800 1434{
003a3e1d 1435 unsigned int maxblocks = map->m_len;
eb47b800 1436 struct dnode_of_data dn;
f9811703 1437 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f9d6d059 1438 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
46008c6d 1439 pgoff_t pgofs, end_offset, end;
bfad7c2d 1440 int err = 0, ofs = 1;
46008c6d
CY		 1441 unsigned int ofs_in_node, last_ofs_in_node;
1442 blkcnt_t prealloc;
e15882b6 1443 struct extent_info ei = {0,0,0};
7df3a431 1444 block_t blkaddr;
c4020b2d 1445 unsigned int start_pgofs;
eb47b800 1446
dfd02e4d
CY		 1447 if (!maxblocks)
1448 return 0;
1449
003a3e1d
JK		 1450 map->m_len = 0;
1451 map->m_flags = 0;
1452
1453 /* it only supports block size == page size */
1454 pgofs = (pgoff_t)map->m_lblk;
46008c6d 1455 end = pgofs + maxblocks;
eb47b800 1456
24b84912 1457 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
b0332a0f 1458 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f4f0b677
JZ		 1459 map->m_may_create)
1460 goto next_dnode;
1461
003a3e1d
JK		 1462 map->m_pblk = ei.blk + pgofs - ei.fofs;
1463 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1464 map->m_flags = F2FS_MAP_MAPPED;
c4020b2d
CY		 1465 if (map->m_next_extent)
1466 *map->m_next_extent = pgofs + map->m_len;
1e78e8bd
ST		 1467
1468 /* for hardware encryption, but to avoid potential issue in future */
1469 if (flag == F2FS_GET_BLOCK_DIO)
1470 f2fs_wait_on_block_writeback_range(inode,
1471 map->m_pblk, map->m_len);
bfad7c2d 1472 goto out;
a2e7d1bf 1473 }
bfad7c2d 1474
4fe71e88 1475next_dnode:
f9d6d059 1476 if (map->m_may_create)
0ef81833 1477 f2fs_do_map_lock(sbi, flag, true);
eb47b800
JK		 1478
1479 /* When reading holes, we need its node page */
1480 set_new_dnode(&dn, inode, NULL, NULL, 0);
4d57b86d 1481 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1ec79083 1482 if (err) {
43473f96
CY		 1483 if (flag == F2FS_GET_BLOCK_BMAP)
1484 map->m_pblk = 0;
da85985c 1485 if (err == -ENOENT) {
bfad7c2d 1486 err = 0;
da85985c
CY		 1487 if (map->m_next_pgofs)
1488 *map->m_next_pgofs =
4d57b86d 1489 f2fs_get_next_page_offset(&dn, pgofs);
c4020b2d
CY		 1490 if (map->m_next_extent)
1491 *map->m_next_extent =
4d57b86d 1492 f2fs_get_next_page_offset(&dn, pgofs);
da85985c 1493 }
bfad7c2d 1494 goto unlock_out;
848753aa 1495 }
973163fc 1496
c4020b2d 1497 start_pgofs = pgofs;
46008c6d 1498 prealloc = 0;
230436b3 1499 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
81ca7350 1500 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
4fe71e88
CY		 1501
1502next_block:
a2ced1ce 1503 blkaddr = f2fs_data_blkaddr(&dn);
4fe71e88 1504
c9b60788 1505 if (__is_valid_data_blkaddr(blkaddr) &&
93770ab7 1506 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
10f966bb 1507 err = -EFSCORRUPTED;
c9b60788
CY		 1508 goto sync_out;
1509 }
1510
93770ab7 1511 if (__is_valid_data_blkaddr(blkaddr)) {
f847c699 1512 /* use out-place-update for driect IO under LFS mode */
b0332a0f 1513 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
f9d6d059 1514 map->m_may_create) {
f847c699 1515 err = __allocate_data_block(&dn, map->m_seg_type);
05e36006
CY		 1516 if (err)
1517 goto sync_out;
1518 blkaddr = dn.data_blkaddr;
1519 set_inode_flag(inode, FI_APPEND_WRITE);
f847c699
CY		 1520 }
1521 } else {
973163fc 1522 if (create) {
f9811703
CY		 1523 if (unlikely(f2fs_cp_error(sbi))) {
1524 err = -EIO;
4fe71e88 1525 goto sync_out;
f9811703 1526 }
24b84912 1527 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
46008c6d
CY		 1528 if (blkaddr == NULL_ADDR) {
1529 prealloc++;
1530 last_ofs_in_node = dn.ofs_in_node;
1531 }
24b84912 1532 } else {
0a4daae5
JK		 1533 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1534 flag != F2FS_GET_BLOCK_DIO);
d5097be5
HL		 1535 err = __allocate_data_block(&dn,
1536 map->m_seg_type);
6f2d8ed6 1537 if (!err)
91942321 1538 set_inode_flag(inode, FI_APPEND_WRITE);
24b84912 1539 }
973163fc 1540 if (err)
4fe71e88 1541 goto sync_out;
3f2be043 1542 map->m_flags |= F2FS_MAP_NEW;
4fe71e88 1543 blkaddr = dn.data_blkaddr;
973163fc 1544 } else {
43473f96
CY		 1545 if (flag == F2FS_GET_BLOCK_BMAP) {
1546 map->m_pblk = 0;
1547 goto sync_out;
1548 }
c4020b2d
CY		 1549 if (flag == F2FS_GET_BLOCK_PRECACHE)
1550 goto sync_out;
da85985c
CY		 1551 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1552 blkaddr == NULL_ADDR) {
1553 if (map->m_next_pgofs)
1554 *map->m_next_pgofs = pgofs + 1;
4c2ac6a8 1555 goto sync_out;
da85985c 1556 }
f3d98e74
CY		 1557 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1558 /* for defragment case */
1559 if (map->m_next_pgofs)
1560 *map->m_next_pgofs = pgofs + 1;
4fe71e88 1561 goto sync_out;
f3d98e74 1562 }
e2b4e2bc 1563 }
e2b4e2bc 1564 }
eb47b800 1565
46008c6d
CY		 1566 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1567 goto skip;
1568
4fe71e88
CY		 1569 if (map->m_len == 0) {
1570 /* preallocated unwritten block should be mapped for fiemap. */
1571 if (blkaddr == NEW_ADDR)
1572 map->m_flags |= F2FS_MAP_UNWRITTEN;
1573 map->m_flags |= F2FS_MAP_MAPPED;
1574
1575 map->m_pblk = blkaddr;
1576 map->m_len = 1;
1577 } else if ((map->m_pblk != NEW_ADDR &&
1578 blkaddr == (map->m_pblk + ofs)) ||
b439b103 1579 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
46008c6d 1580 flag == F2FS_GET_BLOCK_PRE_DIO) {
4fe71e88
CY		 1581 ofs++;
1582 map->m_len++;
1583 } else {
1584 goto sync_out;
1585 }
bfad7c2d 1586
46008c6d 1587skip:
bfad7c2d
JK		 1588 dn.ofs_in_node++;
1589 pgofs++;
1590
46008c6d
CY		 1591 /* preallocate blocks in batch for one dnode page */
1592 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1593 (pgofs == end || dn.ofs_in_node == end_offset)) {
7df3a431 1594
46008c6d 1595 dn.ofs_in_node = ofs_in_node;
4d57b86d 1596 err = f2fs_reserve_new_blocks(&dn, prealloc);
46008c6d
CY		 1597 if (err)
1598 goto sync_out;
bfad7c2d 1599
46008c6d
CY		 1600 map->m_len += dn.ofs_in_node - ofs_in_node;
1601 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1602 err = -ENOSPC;
1603 goto sync_out;
3104af35 1604 }
46008c6d
CY		 1605 dn.ofs_in_node = end_offset;
1606 }
1607
1608 if (pgofs >= end)
1609 goto sync_out;
1610 else if (dn.ofs_in_node < end_offset)
1611 goto next_block;
1612
c4020b2d
CY		 1613 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1614 if (map->m_flags & F2FS_MAP_MAPPED) {
1615 unsigned int ofs = start_pgofs - map->m_lblk;
1616
1617 f2fs_update_extent_cache_range(&dn,
1618 start_pgofs, map->m_pblk + ofs,
1619 map->m_len - ofs);
1620 }
1621 }
1622
46008c6d
CY		 1623 f2fs_put_dnode(&dn);
1624
f9d6d059 1625 if (map->m_may_create) {
0ef81833 1626 f2fs_do_map_lock(sbi, flag, false);
6f2d8ed6 1627 f2fs_balance_fs(sbi, dn.node_changed);
eb47b800 1628 }
46008c6d 1629 goto next_dnode;
7df3a431 1630
bfad7c2d 1631sync_out:
1e78e8bd
ST		 1632
1633 /* for hardware encryption, but to avoid potential issue in future */
1634 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1635 f2fs_wait_on_block_writeback_range(inode,
1636 map->m_pblk, map->m_len);
1637
c4020b2d
CY		 1638 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1639 if (map->m_flags & F2FS_MAP_MAPPED) {
1640 unsigned int ofs = start_pgofs - map->m_lblk;
1641
1642 f2fs_update_extent_cache_range(&dn,
1643 start_pgofs, map->m_pblk + ofs,
1644 map->m_len - ofs);
1645 }
1646 if (map->m_next_extent)
1647 *map->m_next_extent = pgofs + 1;
1648 }
eb47b800 1649 f2fs_put_dnode(&dn);
bfad7c2d 1650unlock_out:
f9d6d059 1651 if (map->m_may_create) {
0ef81833 1652 f2fs_do_map_lock(sbi, flag, false);
6f2d8ed6 1653 f2fs_balance_fs(sbi, dn.node_changed);
2a340760 1654 }
bfad7c2d 1655out:
003a3e1d 1656 trace_f2fs_map_blocks(inode, map, err);
bfad7c2d 1657 return err;
eb47b800
JK		 1658}
1659
b91050a8
HL		 1660bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1661{
1662 struct f2fs_map_blocks map;
1663 block_t last_lblk;
1664 int err;
1665
1666 if (pos + len > i_size_read(inode))
1667 return false;
1668
1669 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1670 map.m_next_pgofs = NULL;
1671 map.m_next_extent = NULL;
1672 map.m_seg_type = NO_CHECK_TYPE;
f4f0b677 1673 map.m_may_create = false;
b91050a8
HL		 1674 last_lblk = F2FS_BLK_ALIGN(pos + len);
1675
1676 while (map.m_lblk < last_lblk) {
1677 map.m_len = last_lblk - map.m_lblk;
1678 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1679 if (err || map.m_len == 0)
1680 return false;
1681 map.m_lblk += map.m_len;
1682 }
1683 return true;
1684}
1685
43b9d4b4
JK		 1686static inline u64 bytes_to_blks(struct inode *inode, u64 bytes)
1687{
1688 return (bytes >> inode->i_blkbits);
1689}
1690
1691static inline u64 blks_to_bytes(struct inode *inode, u64 blks)
1692{
1693 return (blks << inode->i_blkbits);
1694}
1695
003a3e1d 1696static int __get_data_block(struct inode *inode, sector_t iblock,
da85985c 1697 struct buffer_head *bh, int create, int flag,
f9d6d059 1698 pgoff_t *next_pgofs, int seg_type, bool may_write)
003a3e1d
JK		 1699{
1700 struct f2fs_map_blocks map;
a7de6086 1701 int err;
003a3e1d
JK		 1702
1703 map.m_lblk = iblock;
43b9d4b4 1704 map.m_len = bytes_to_blks(inode, bh->b_size);
da85985c 1705 map.m_next_pgofs = next_pgofs;
c4020b2d 1706 map.m_next_extent = NULL;
d5097be5 1707 map.m_seg_type = seg_type;
f9d6d059 1708 map.m_may_create = may_write;
003a3e1d 1709
a7de6086
JK		 1710 err = f2fs_map_blocks(inode, &map, create, flag);
1711 if (!err) {
003a3e1d
JK		 1712 map_bh(bh, inode->i_sb, map.m_pblk);
1713 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
43b9d4b4 1714 bh->b_size = blks_to_bytes(inode, map.m_len);
003a3e1d 1715 }
a7de6086 1716 return err;
003a3e1d
JK		 1717}
1718
f9d6d059
CY		 1719static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1720 struct buffer_head *bh_result, int create)
1721{
1722 return __get_data_block(inode, iblock, bh_result, create,
1723 F2FS_GET_BLOCK_DIO, NULL,
1724 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
ebc29b62 1725 true);
e2b4e2bc
CY		 1726}
1727
1728static int get_data_block_dio(struct inode *inode, sector_t iblock,
ccfb3000
JK		 1729 struct buffer_head *bh_result, int create)
1730{
e2b4e2bc 1731 return __get_data_block(inode, iblock, bh_result, create,
f9d6d059
CY		 1732 F2FS_GET_BLOCK_DIO, NULL,
1733 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1734 false);
ccfb3000
JK		 1735}
1736
442a9dbd
CY		 1737static int f2fs_xattr_fiemap(struct inode *inode,
1738 struct fiemap_extent_info *fieinfo)
1739{
1740 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1741 struct page *page;
1742 struct node_info ni;
1743 __u64 phys = 0, len;
1744 __u32 flags;
1745 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1746 int err = 0;
1747
1748 if (f2fs_has_inline_xattr(inode)) {
1749 int offset;
1750
1751 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1752 inode->i_ino, false);
1753 if (!page)
1754 return -ENOMEM;
1755
7735730d
CY		 1756 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1757 if (err) {
1758 f2fs_put_page(page, 1);
1759 return err;
1760 }
442a9dbd 1761
6cbfcab5 1762 phys = blks_to_bytes(inode, ni.blk_addr);
442a9dbd
CY		 1763 offset = offsetof(struct f2fs_inode, i_addr) +
1764 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
b323fd28 1765 get_inline_xattr_addrs(inode));
442a9dbd
CY		 1766
1767 phys += offset;
1768 len = inline_xattr_size(inode);
1769
1770 f2fs_put_page(page, 1);
1771
1772 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1773
1774 if (!xnid)
1775 flags |= FIEMAP_EXTENT_LAST;
1776
1777 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
dd5a09bd 1778 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
442a9dbd
CY		 1779 if (err || err == 1)
1780 return err;
1781 }
1782
1783 if (xnid) {
1784 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1785 if (!page)
1786 return -ENOMEM;
1787
7735730d
CY		 1788 err = f2fs_get_node_info(sbi, xnid, &ni);
1789 if (err) {
1790 f2fs_put_page(page, 1);
1791 return err;
1792 }
442a9dbd 1793
6cbfcab5 1794 phys = blks_to_bytes(inode, ni.blk_addr);
442a9dbd
CY		 1795 len = inode->i_sb->s_blocksize;
1796
1797 f2fs_put_page(page, 1);
1798
1799 flags = FIEMAP_EXTENT_LAST;
1800 }
1801
dd5a09bd 1802 if (phys) {
442a9dbd 1803 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
dd5a09bd
CY		 1804 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
1805 }
442a9dbd
CY		 1806
1807 return (err < 0 ? err : 0);
1808}
1809
bf38fbad
CY		 1810static loff_t max_inode_blocks(struct inode *inode)
1811{
1812 loff_t result = ADDRS_PER_INODE(inode);
1813 loff_t leaf_count = ADDRS_PER_BLOCK(inode);
1814
1815 /* two direct node blocks */
1816 result += (leaf_count * 2);
1817
1818 /* two indirect node blocks */
1819 leaf_count *= NIDS_PER_BLOCK;
1820 result += (leaf_count * 2);
1821
1822 /* one double indirect node block */
1823 leaf_count *= NIDS_PER_BLOCK;
1824 result += leaf_count;
1825
1826 return result;
1827}
1828
9ab70134
JK		 1829int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1830 u64 start, u64 len)
1831{
b876f4c9 1832 struct f2fs_map_blocks map;
7f63eb77 1833 sector_t start_blk, last_blk;
da85985c 1834 pgoff_t next_pgofs;
7f63eb77
JK		 1835 u64 logical = 0, phys = 0, size = 0;
1836 u32 flags = 0;
7f63eb77 1837 int ret = 0;
bf38fbad
CY		 1838 bool compr_cluster = false;
1839 unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
7f63eb77 1840
c4020b2d
CY		 1841 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1842 ret = f2fs_precache_extents(inode);
1843 if (ret)
1844 return ret;
1845 }
1846
45dd052e 1847 ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR);
7f63eb77
JK		 1848 if (ret)
1849 return ret;
1850
f1b43d4c
CY		 1851 inode_lock(inode);
1852
442a9dbd
CY		 1853 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1854 ret = f2fs_xattr_fiemap(inode, fieinfo);
1855 goto out;
1856 }
1857
7975f349 1858 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
67f8cf3c
JK		 1859 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1860 if (ret != -EAGAIN)
f1b43d4c 1861 goto out;
67f8cf3c
JK		 1862 }
1863
6cbfcab5
JK		 1864 if (bytes_to_blks(inode, len) == 0)
1865 len = blks_to_bytes(inode, 1);
7f63eb77 1866
6cbfcab5
JK		 1867 start_blk = bytes_to_blks(inode, start);
1868 last_blk = bytes_to_blks(inode, start + len - 1);
9a950d52 1869
7f63eb77 1870next:
b876f4c9
JK		 1871 memset(&map, 0, sizeof(map));
1872 map.m_lblk = start_blk;
1873 map.m_len = bytes_to_blks(inode, len);
1874 map.m_next_pgofs = &next_pgofs;
1875 map.m_seg_type = NO_CHECK_TYPE;
7f63eb77 1876
bf38fbad 1877 if (compr_cluster)
b876f4c9 1878 map.m_len = cluster_size - 1;
bf38fbad 1879
b876f4c9 1880 ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
7f63eb77
JK		 1881 if (ret)
1882 goto out;
1883
1884 /* HOLE */
b876f4c9 1885 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
da85985c 1886 start_blk = next_pgofs;
58736fa6 1887
6cbfcab5 1888 if (blks_to_bytes(inode, start_blk) < blks_to_bytes(inode,
bf38fbad 1889 max_inode_blocks(inode)))
9a950d52 1890 goto prep_next;
58736fa6 1891
9a950d52
FL		 1892 flags |= FIEMAP_EXTENT_LAST;
1893 }
7f63eb77 1894
da5af127 1895 if (size) {
0953fe86 1896 flags |= FIEMAP_EXTENT_MERGED;
62230e0d 1897 if (IS_ENCRYPTED(inode))
da5af127
CY		 1898 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1899
9a950d52
FL		 1900 ret = fiemap_fill_next_extent(fieinfo, logical,
1901 phys, size, flags);
dd5a09bd 1902 trace_f2fs_fiemap(inode, logical, phys, size, flags, ret);
bf38fbad
CY		 1903 if (ret)
1904 goto out;
1905 size = 0;
da5af127 1906 }
7f63eb77 1907
bf38fbad 1908 if (start_blk > last_blk)
9a950d52 1909 goto out;
7f63eb77 1910
bf38fbad
CY		 1911 if (compr_cluster) {
1912 compr_cluster = false;
1913
1914
6cbfcab5 1915 logical = blks_to_bytes(inode, start_blk - 1);
b876f4c9 1916 phys = blks_to_bytes(inode, map.m_pblk);
6cbfcab5 1917 size = blks_to_bytes(inode, cluster_size);
bf38fbad
CY		 1918
1919 flags |= FIEMAP_EXTENT_ENCODED;
1920
1921 start_blk += cluster_size - 1;
1922
1923 if (start_blk > last_blk)
1924 goto out;
1925
1926 goto prep_next;
1927 }
1928
b876f4c9 1929 if (map.m_pblk == COMPRESS_ADDR) {
bf38fbad
CY		 1930 compr_cluster = true;
1931 start_blk++;
1932 goto prep_next;
1933 }
1934
6cbfcab5 1935 logical = blks_to_bytes(inode, start_blk);
b876f4c9
JK		 1936 phys = blks_to_bytes(inode, map.m_pblk);
1937 size = blks_to_bytes(inode, map.m_len);
9a950d52 1938 flags = 0;
b876f4c9 1939 if (map.m_flags & F2FS_MAP_UNWRITTEN)
9a950d52 1940 flags = FIEMAP_EXTENT_UNWRITTEN;
7f63eb77 1941
6cbfcab5 1942 start_blk += bytes_to_blks(inode, size);
7f63eb77 1943
9a950d52 1944prep_next:
7f63eb77
JK		 1945 cond_resched();
1946 if (fatal_signal_pending(current))
1947 ret = -EINTR;
1948 else
1949 goto next;
1950out:
1951 if (ret == 1)
1952 ret = 0;
1953
5955102c 1954 inode_unlock(inode);
7f63eb77 1955 return ret;
9ab70134
JK		 1956}
1957
95ae251f
EB		 1958static inline loff_t f2fs_readpage_limit(struct inode *inode)
1959{
1960 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1961 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1962 return inode->i_sb->s_maxbytes;
1963
1964 return i_size_read(inode);
1965}
1966
2df0ab04
CY		 1967static int f2fs_read_single_page(struct inode *inode, struct page *page,
1968 unsigned nr_pages,
1969 struct f2fs_map_blocks *map,
1970 struct bio **bio_ret,
1971 sector_t *last_block_in_bio,
1972 bool is_readahead)
1973{
1974 struct bio *bio = *bio_ret;
43b9d4b4 1975 const unsigned blocksize = blks_to_bytes(inode, 1);
2df0ab04
CY		 1976 sector_t block_in_file;
1977 sector_t last_block;
1978 sector_t last_block_in_file;
1979 sector_t block_nr;
1980 int ret = 0;
1981
4969c06a 1982 block_in_file = (sector_t)page_index(page);
2df0ab04 1983 last_block = block_in_file + nr_pages;
43b9d4b4
JK		 1984 last_block_in_file = bytes_to_blks(inode,
1985 f2fs_readpage_limit(inode) + blocksize - 1);
2df0ab04
CY		 1986 if (last_block > last_block_in_file)
1987 last_block = last_block_in_file;
1988
1989 /* just zeroing out page which is beyond EOF */
1990 if (block_in_file >= last_block)
1991 goto zero_out;
1992 /*
1993 * Map blocks using the previous result first.
1994 */
1995 if ((map->m_flags & F2FS_MAP_MAPPED) &&
1996 block_in_file > map->m_lblk &&
1997 block_in_file < (map->m_lblk + map->m_len))
1998 goto got_it;
1999
2000 /*
2001 * Then do more f2fs_map_blocks() calls until we are
2002 * done with this page.
2003 */
2004 map->m_lblk = block_in_file;
2005 map->m_len = last_block - block_in_file;
2006
2007 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
2008 if (ret)
2009 goto out;
2010got_it:
2011 if ((map->m_flags & F2FS_MAP_MAPPED)) {
2012 block_nr = map->m_pblk + block_in_file - map->m_lblk;
2013 SetPageMappedToDisk(page);
2014
4969c06a
JK		 2015 if (!PageUptodate(page) && (!PageSwapCache(page) &&
2016 !cleancache_get_page(page))) {
2df0ab04
CY		 2017 SetPageUptodate(page);
2018 goto confused;
2019 }
2020
2021 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
93770ab7 2022 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 2023 ret = -EFSCORRUPTED;
2df0ab04
CY		 2024 goto out;
2025 }
2026 } else {
2027zero_out:
2028 zero_user_segment(page, 0, PAGE_SIZE);
95ae251f
EB		 2029 if (f2fs_need_verity(inode, page->index) &&
2030 !fsverity_verify_page(page)) {
2031 ret = -EIO;
2032 goto out;
2033 }
2df0ab04
CY		 2034 if (!PageUptodate(page))
2035 SetPageUptodate(page);
2036 unlock_page(page);
2037 goto out;
2038 }
2039
2040 /*
2041 * This page will go to BIO. Do we need to send this
2042 * BIO off first?
2043 */
27aacd28
ST		 2044 if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio,
2045 *last_block_in_bio, block_nr) ||
2046 !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
2df0ab04
CY		 2047submit_and_realloc:
2048 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2049 bio = NULL;
2050 }
2051 if (bio == NULL) {
2052 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
0683728a 2053 is_readahead ? REQ_RAHEAD : 0, page->index,
7f59b277 2054 false);
2df0ab04
CY		 2055 if (IS_ERR(bio)) {
2056 ret = PTR_ERR(bio);
2057 bio = NULL;
2058 goto out;
2059 }
2060 }
2061
2062 /*
2063 * If the page is under writeback, we need to wait for
2064 * its completion to see the correct decrypted data.
2065 */
2066 f2fs_wait_on_block_writeback(inode, block_nr);
2067
2068 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2069 goto submit_and_realloc;
2070
2071 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
8b83ac81 2072 f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
2df0ab04
CY		 2073 ClearPageError(page);
2074 *last_block_in_bio = block_nr;
2075 goto out;
2076confused:
2077 if (bio) {
2078 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2079 bio = NULL;
2080 }
2081 unlock_page(page);
2082out:
2083 *bio_ret = bio;
2084 return ret;
2085}
2086
4c8ff709
CY		 2087#ifdef CONFIG_F2FS_FS_COMPRESSION
2088int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2089 unsigned nr_pages, sector_t *last_block_in_bio,
0683728a 2090 bool is_readahead, bool for_write)
4c8ff709
CY		 2091{
2092 struct dnode_of_data dn;
2093 struct inode *inode = cc->inode;
2094 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2095 struct bio *bio = *bio_ret;
2096 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2097 sector_t last_block_in_file;
43b9d4b4 2098 const unsigned blocksize = blks_to_bytes(inode, 1);
4c8ff709
CY		 2099 struct decompress_io_ctx *dic = NULL;
2100 int i;
2101 int ret = 0;
2102
2103 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2104
43b9d4b4
JK		 2105 last_block_in_file = bytes_to_blks(inode,
2106 f2fs_readpage_limit(inode) + blocksize - 1);
4c8ff709
CY		 2107
2108 /* get rid of pages beyond EOF */
2109 for (i = 0; i < cc->cluster_size; i++) {
2110 struct page *page = cc->rpages[i];
2111
2112 if (!page)
2113 continue;
2114 if ((sector_t)page->index >= last_block_in_file) {
2115 zero_user_segment(page, 0, PAGE_SIZE);
2116 if (!PageUptodate(page))
2117 SetPageUptodate(page);
2118 } else if (!PageUptodate(page)) {
2119 continue;
2120 }
2121 unlock_page(page);
2122 cc->rpages[i] = NULL;
2123 cc->nr_rpages--;
2124 }
2125
2126 /* we are done since all pages are beyond EOF */
2127 if (f2fs_cluster_is_empty(cc))
2128 goto out;
2129
2130 set_new_dnode(&dn, inode, NULL, NULL, 0);
2131 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2132 if (ret)
2133 goto out;
2134
a86d27dd 2135 f2fs_bug_on(sbi, dn.data_blkaddr != COMPRESS_ADDR);
4c8ff709
CY		 2136
2137 for (i = 1; i < cc->cluster_size; i++) {
2138 block_t blkaddr;
2139
a2ced1ce 2140 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2141 dn.ofs_in_node + i);
2142
2143 if (!__is_valid_data_blkaddr(blkaddr))
2144 break;
2145
2146 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2147 ret = -EFAULT;
2148 goto out_put_dnode;
2149 }
2150 cc->nr_cpages++;
2151 }
2152
2153 /* nothing to decompress */
2154 if (cc->nr_cpages == 0) {
2155 ret = 0;
2156 goto out_put_dnode;
2157 }
2158
2159 dic = f2fs_alloc_dic(cc);
2160 if (IS_ERR(dic)) {
2161 ret = PTR_ERR(dic);
2162 goto out_put_dnode;
2163 }
2164
2165 for (i = 0; i < dic->nr_cpages; i++) {
2166 struct page *page = dic->cpages[i];
2167 block_t blkaddr;
7f59b277 2168 struct bio_post_read_ctx *ctx;
4c8ff709 2169
a2ced1ce 2170 blkaddr = data_blkaddr(dn.inode, dn.node_page,
4c8ff709
CY		 2171 dn.ofs_in_node + i + 1);
2172
27aacd28
ST		 2173 if (bio && (!page_is_mergeable(sbi, bio,
2174 *last_block_in_bio, blkaddr) ||
2175 !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
4c8ff709
CY		 2176submit_and_realloc:
2177 __submit_bio(sbi, bio, DATA);
2178 bio = NULL;
2179 }
2180
2181 if (!bio) {
2182 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2183 is_readahead ? REQ_RAHEAD : 0,
7f59b277 2184 page->index, for_write);
4c8ff709
CY		 2185 if (IS_ERR(bio)) {
2186 ret = PTR_ERR(bio);
7f59b277 2187 f2fs_decompress_end_io(dic, ret);
4c8ff709 2188 f2fs_put_dnode(&dn);
f3494345 2189 *bio_ret = NULL;
4c8ff709
CY		 2190 return ret;
2191 }
2192 }
2193
2194 f2fs_wait_on_block_writeback(inode, blkaddr);
2195
2196 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2197 goto submit_and_realloc;
2198
03382f1a 2199 ctx = bio->bi_private;
7f59b277
EB		 2200 ctx->enabled_steps |= STEP_DECOMPRESS;
2201 refcount_inc(&dic->refcnt);
03382f1a 2202
4c8ff709 2203 inc_page_count(sbi, F2FS_RD_DATA);
8b83ac81 2204 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
9c122384 2205 f2fs_update_iostat(sbi, FS_CDATA_READ_IO, F2FS_BLKSIZE);
4c8ff709
CY		 2206 ClearPageError(page);
2207 *last_block_in_bio = blkaddr;
2208 }
2209
2210 f2fs_put_dnode(&dn);
2211
2212 *bio_ret = bio;
2213 return 0;
2214
2215out_put_dnode:
2216 f2fs_put_dnode(&dn);
2217out:
7f59b277
EB		 2218 for (i = 0; i < cc->cluster_size; i++) {
2219 if (cc->rpages[i]) {
2220 ClearPageUptodate(cc->rpages[i]);
2221 ClearPageError(cc->rpages[i]);
2222 unlock_page(cc->rpages[i]);
2223 }
2224 }
4c8ff709
CY		 2225 *bio_ret = bio;
2226 return ret;
2227}
2228#endif
2229
f1e88660
JK		 2230/*
2231 * This function was originally taken from fs/mpage.c, and customized for f2fs.
2232 * Major change was from block_size == page_size in f2fs by default.
2233 */
e20a7693 2234static int f2fs_mpage_readpages(struct inode *inode,
23323196 2235 struct readahead_control *rac, struct page *page)
f1e88660
JK		 2236{
2237 struct bio *bio = NULL;
f1e88660 2238 sector_t last_block_in_bio = 0;
f1e88660 2239 struct f2fs_map_blocks map;
4c8ff709
CY		 2240#ifdef CONFIG_F2FS_FS_COMPRESSION
2241 struct compress_ctx cc = {
2242 .inode = inode,
2243 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2244 .cluster_size = F2FS_I(inode)->i_cluster_size,
2245 .cluster_idx = NULL_CLUSTER,
2246 .rpages = NULL,
2247 .cpages = NULL,
2248 .nr_rpages = 0,
2249 .nr_cpages = 0,
2250 };
2251#endif
23323196 2252 unsigned nr_pages = rac ? readahead_count(rac) : 1;
4c8ff709 2253 unsigned max_nr_pages = nr_pages;
2df0ab04 2254 int ret = 0;
f1e88660
JK		 2255
2256 map.m_pblk = 0;
2257 map.m_lblk = 0;
2258 map.m_len = 0;
2259 map.m_flags = 0;
da85985c 2260 map.m_next_pgofs = NULL;
c4020b2d 2261 map.m_next_extent = NULL;
d5097be5 2262 map.m_seg_type = NO_CHECK_TYPE;
f9d6d059 2263 map.m_may_create = false;
f1e88660 2264
736c0a74 2265 for (; nr_pages; nr_pages--) {
23323196
MWO		 2266 if (rac) {
2267 page = readahead_page(rac);
a83d50bc 2268 prefetchw(&page->flags);
f1e88660
JK		 2269 }
2270
4c8ff709
CY		 2271#ifdef CONFIG_F2FS_FS_COMPRESSION
2272 if (f2fs_compressed_file(inode)) {
2273 /* there are remained comressed pages, submit them */
2274 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2275 ret = f2fs_read_multi_pages(&cc, &bio,
2276 max_nr_pages,
2277 &last_block_in_bio,
23323196 2278 rac != NULL, false);
4c8ff709
CY		 2279 f2fs_destroy_compress_ctx(&cc);
2280 if (ret)
2281 goto set_error_page;
2282 }
2283 ret = f2fs_is_compressed_cluster(inode, page->index);
2284 if (ret < 0)
2285 goto set_error_page;
2286 else if (!ret)
2287 goto read_single_page;
2288
2289 ret = f2fs_init_compress_ctx(&cc);
2290 if (ret)
2291 goto set_error_page;
2292
2293 f2fs_compress_ctx_add_page(&cc, page);
2294
2295 goto next_page;
2296 }
2297read_single_page:
2298#endif
2299
2300 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
23323196 2301 &bio, &last_block_in_bio, rac);
2df0ab04 2302 if (ret) {
4c8ff709
CY		 2303#ifdef CONFIG_F2FS_FS_COMPRESSION
2304set_error_page:
2305#endif
2df0ab04 2306 SetPageError(page);
09cbfeaf 2307 zero_user_segment(page, 0, PAGE_SIZE);
f1e88660 2308 unlock_page(page);
f1e88660 2309 }
23323196 2310#ifdef CONFIG_F2FS_FS_COMPRESSION
f1e88660 2311next_page:
23323196
MWO		 2312#endif
2313 if (rac)
09cbfeaf 2314 put_page(page);
4c8ff709
CY		 2315
2316#ifdef CONFIG_F2FS_FS_COMPRESSION
2317 if (f2fs_compressed_file(inode)) {
2318 /* last page */
2319 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2320 ret = f2fs_read_multi_pages(&cc, &bio,
2321 max_nr_pages,
2322 &last_block_in_bio,
23323196 2323 rac != NULL, false);
4c8ff709
CY		 2324 f2fs_destroy_compress_ctx(&cc);
2325 }
2326 }
2327#endif
f1e88660 2328 }
f1e88660 2329 if (bio)
4fc29c1a 2330 __submit_bio(F2FS_I_SB(inode), bio, DATA);
23323196 2331 return ret;
f1e88660
JK		 2332}
2333
eb47b800
JK		 2334static int f2fs_read_data_page(struct file *file, struct page *page)
2335{
4969c06a 2336 struct inode *inode = page_file_mapping(page)->host;
b3d208f9 2337 int ret = -EAGAIN;
9ffe0fb5 2338
c20e89cd
CY		 2339 trace_f2fs_readpage(page, DATA);
2340
4c8ff709
CY		 2341 if (!f2fs_is_compress_backend_ready(inode)) {
2342 unlock_page(page);
2343 return -EOPNOTSUPP;
2344 }
2345
e1c42045 2346 /* If the file has inline data, try to read it directly */
9ffe0fb5
HL		 2347 if (f2fs_has_inline_data(inode))
2348 ret = f2fs_read_inline_data(inode, page);
b3d208f9 2349 if (ret == -EAGAIN)
e20a7693 2350 ret = f2fs_mpage_readpages(inode, NULL, page);
9ffe0fb5 2351 return ret;
eb47b800
JK		 2352}
2353
23323196 2354static void f2fs_readahead(struct readahead_control *rac)
eb47b800 2355{
23323196 2356 struct inode *inode = rac->mapping->host;
b8c29400 2357
23323196 2358 trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac));
9ffe0fb5 2359
4c8ff709 2360 if (!f2fs_is_compress_backend_ready(inode))
23323196 2361 return;
4c8ff709 2362
9ffe0fb5
HL		 2363 /* If the file has inline data, skip readpages */
2364 if (f2fs_has_inline_data(inode))
23323196 2365 return;
9ffe0fb5 2366
e20a7693 2367 f2fs_mpage_readpages(inode, rac, NULL);
eb47b800
JK		 2368}
2369
4c8ff709 2370int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
7eab0c0d
HP		 2371{
2372 struct inode *inode = fio->page->mapping->host;
4c8ff709 2373 struct page *mpage, *page;
7eab0c0d
HP		 2374 gfp_t gfp_flags = GFP_NOFS;
2375
1958593e 2376 if (!f2fs_encrypted_file(inode))
7eab0c0d
HP		 2377 return 0;
2378
4c8ff709
CY		 2379 page = fio->compressed_page ? fio->compressed_page : fio->page;
2380
6dbb1796 2381 /* wait for GCed page writeback via META_MAPPING */
0ded69f6 2382 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
7eab0c0d 2383
27aacd28
ST		 2384 if (fscrypt_inode_uses_inline_crypto(inode))
2385 return 0;
2386
7eab0c0d 2387retry_encrypt:
4c8ff709
CY		 2388 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2389 PAGE_SIZE, 0, gfp_flags);
6aa58d8a
CY		 2390 if (IS_ERR(fio->encrypted_page)) {
2391 /* flush pending IOs and wait for a while in the ENOMEM case */
2392 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2393 f2fs_flush_merged_writes(fio->sbi);
5df7731f 2394 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
6aa58d8a
CY		 2395 gfp_flags |= __GFP_NOFAIL;
2396 goto retry_encrypt;
2397 }
2398 return PTR_ERR(fio->encrypted_page);
2399 }
7eab0c0d 2400
6aa58d8a
CY		 2401 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2402 if (mpage) {
2403 if (PageUptodate(mpage))
2404 memcpy(page_address(mpage),
2405 page_address(fio->encrypted_page), PAGE_SIZE);
2406 f2fs_put_page(mpage, 1);
7eab0c0d 2407 }
6aa58d8a 2408 return 0;
7eab0c0d
HP		 2409}
2410
bb9e3bb8
CY		 2411static inline bool check_inplace_update_policy(struct inode *inode,
2412 struct f2fs_io_info *fio)
7eab0c0d 2413{
bb9e3bb8
CY		 2414 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2415 unsigned int policy = SM_I(sbi)->ipu_policy;
7eab0c0d 2416
bb9e3bb8
CY		 2417 if (policy & (0x1 << F2FS_IPU_FORCE))
2418 return true;
4d57b86d 2419 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
bb9e3bb8
CY		 2420 return true;
2421 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2422 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2423 return true;
4d57b86d 2424 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
bb9e3bb8
CY		 2425 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2426 return true;
2427
2428 /*
2429 * IPU for rewrite async pages
2430 */
2431 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2432 fio && fio->op == REQ_OP_WRITE &&
2433 !(fio->op_flags & REQ_SYNC) &&
62230e0d 2434 !IS_ENCRYPTED(inode))
bb9e3bb8
CY		 2435 return true;
2436
2437 /* this is only set during fdatasync */
2438 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2439 is_inode_flag_set(inode, FI_NEED_IPU))
2440 return true;
2441
4354994f
DR		 2442 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2443 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2444 return true;
2445
bb9e3bb8
CY		 2446 return false;
2447}
2448
4d57b86d 2449bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8 2450{
1ad71a27
JK		 2451 if (f2fs_is_pinned_file(inode))
2452 return true;
bb9e3bb8
CY		 2453
2454 /* if this is cold file, we should overwrite to avoid fragmentation */
2455 if (file_is_cold(inode))
2456 return true;
2457
2458 return check_inplace_update_policy(inode, fio);
2459}
2460
4d57b86d 2461bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
bb9e3bb8
CY		 2462{
2463 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2464
b0332a0f 2465 if (f2fs_lfs_mode(sbi))
bb9e3bb8
CY		 2466 return true;
2467 if (S_ISDIR(inode->i_mode))
2468 return true;
af033b2a
CY		 2469 if (IS_NOQUOTA(inode))
2470 return true;
bb9e3bb8
CY		 2471 if (f2fs_is_atomic_file(inode))
2472 return true;
2473 if (fio) {
2474 if (is_cold_data(fio->page))
2475 return true;
2476 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
2477 return true;
4354994f
DR		 2478 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2479 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2480 return true;
bb9e3bb8
CY		 2481 }
2482 return false;
2483}
2484
7eab0c0d
HP		 2485static inline bool need_inplace_update(struct f2fs_io_info *fio)
2486{
2487 struct inode *inode = fio->page->mapping->host;
2488
4d57b86d 2489 if (f2fs_should_update_outplace(inode, fio))
7eab0c0d
HP		 2490 return false;
2491
4d57b86d 2492 return f2fs_should_update_inplace(inode, fio);
7eab0c0d
HP		 2493}
2494
4d57b86d 2495int f2fs_do_write_data_page(struct f2fs_io_info *fio)
eb47b800 2496{
05ca3632 2497 struct page *page = fio->page;
eb47b800 2498 struct inode *inode = page->mapping->host;
eb47b800 2499 struct dnode_of_data dn;
e959c8f5 2500 struct extent_info ei = {0,0,0};
7735730d 2501 struct node_info ni;
e959c8f5 2502 bool ipu_force = false;
eb47b800
JK		 2503 int err = 0;
2504
2505 set_new_dnode(&dn, inode, NULL, NULL, 0);
e959c8f5
HP		 2506 if (need_inplace_update(fio) &&
2507 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2508 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
a817737e 2509
c9b60788 2510 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2511 DATA_GENERIC_ENHANCE))
10f966bb 2512 return -EFSCORRUPTED;
c9b60788
CY		 2513
2514 ipu_force = true;
2515 fio->need_lock = LOCK_DONE;
2516 goto got_it;
e959c8f5 2517 }
279d6df2 2518
d29460e5
JK		 2519 /* Deadlock due to between page->lock and f2fs_lock_op */
2520 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2521 return -EAGAIN;
279d6df2 2522
4d57b86d 2523 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
eb47b800 2524 if (err)
279d6df2 2525 goto out;
eb47b800 2526
28bc106b 2527 fio->old_blkaddr = dn.data_blkaddr;
eb47b800
JK		 2528
2529 /* This page is already truncated */
7a9d7548 2530 if (fio->old_blkaddr == NULL_ADDR) {
2bca1e23 2531 ClearPageUptodate(page);
2baf0781 2532 clear_cold_data(page);
eb47b800 2533 goto out_writepage;
2bca1e23 2534 }
e959c8f5 2535got_it:
c9b60788
CY		 2536 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2537 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
93770ab7 2538 DATA_GENERIC_ENHANCE)) {
10f966bb 2539 err = -EFSCORRUPTED;
c9b60788
CY		 2540 goto out_writepage;
2541 }
eb47b800
JK		 2542 /*
2543 * If current allocation needs SSR,
2544 * it had better in-place writes for updated data.
2545 */
93770ab7
CY		 2546 if (ipu_force ||
2547 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
7b525dd0 2548 need_inplace_update(fio))) {
4c8ff709 2549 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2550 if (err)
2551 goto out_writepage;
2552
2553 set_page_writeback(page);
17c50035 2554 ClearPageError(page);
279d6df2 2555 f2fs_put_dnode(&dn);
cc15620b 2556 if (fio->need_lock == LOCK_REQ)
279d6df2 2557 f2fs_unlock_op(fio->sbi);
4d57b86d 2558 err = f2fs_inplace_write_data(fio);
6492a335 2559 if (err) {
27aacd28 2560 if (fscrypt_inode_uses_fs_layer_crypto(inode))
d2d0727b 2561 fscrypt_finalize_bounce_page(&fio->encrypted_page);
6492a335
CY		 2562 if (PageWriteback(page))
2563 end_page_writeback(page);
cd23ffa9
CY		 2564 } else {
2565 set_inode_flag(inode, FI_UPDATE_WRITE);
6492a335 2566 }
7eab0c0d 2567 trace_f2fs_do_write_data_page(fio->page, IPU);
279d6df2 2568 return err;
eb47b800 2569 }
279d6df2 2570
cc15620b
JK		 2571 if (fio->need_lock == LOCK_RETRY) {
2572 if (!f2fs_trylock_op(fio->sbi)) {
2573 err = -EAGAIN;
2574 goto out_writepage;
2575 }
2576 fio->need_lock = LOCK_REQ;
2577 }
2578
7735730d
CY		 2579 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2580 if (err)
2581 goto out_writepage;
2582
2583 fio->version = ni.version;
2584
4c8ff709 2585 err = f2fs_encrypt_one_page(fio);
cc15620b
JK		 2586 if (err)
2587 goto out_writepage;
2588
2589 set_page_writeback(page);
17c50035 2590 ClearPageError(page);
cc15620b 2591
4c8ff709
CY		 2592 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2593 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2594
279d6df2 2595 /* LFS mode write path */
4d57b86d 2596 f2fs_outplace_write_data(&dn, fio);
279d6df2
HP		 2597 trace_f2fs_do_write_data_page(page, OPU);
2598 set_inode_flag(inode, FI_APPEND_WRITE);
2599 if (page->index == 0)
2600 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
eb47b800
JK		 2601out_writepage:
2602 f2fs_put_dnode(&dn);
279d6df2 2603out:
cc15620b 2604 if (fio->need_lock == LOCK_REQ)
279d6df2 2605 f2fs_unlock_op(fio->sbi);
eb47b800
JK		 2606 return err;
2607}
2608
4c8ff709 2609int f2fs_write_single_data_page(struct page *page, int *submitted,
8648de2c
CY		 2610 struct bio **bio,
2611 sector_t *last_block,
b0af6d49 2612 struct writeback_control *wbc,
4c8ff709 2613 enum iostat_type io_type,
3afae09f
CY		 2614 int compr_blocks,
2615 bool allow_balance)
eb47b800
JK		 2616{
2617 struct inode *inode = page->mapping->host;
4081363f 2618 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
eb47b800 2619 loff_t i_size = i_size_read(inode);
4c8ff709 2620 const pgoff_t end_index = ((unsigned long long)i_size)
09cbfeaf 2621 >> PAGE_SHIFT;
1f0d5c91 2622 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
9ffe0fb5 2623 unsigned offset = 0;
39936837 2624 bool need_balance_fs = false;
eb47b800 2625 int err = 0;
458e6197 2626 struct f2fs_io_info fio = {
05ca3632 2627 .sbi = sbi,
39d787be 2628 .ino = inode->i_ino,
458e6197 2629 .type = DATA,
04d328de 2630 .op = REQ_OP_WRITE,
7637241e 2631 .op_flags = wbc_to_write_flags(wbc),
e959c8f5 2632 .old_blkaddr = NULL_ADDR,
05ca3632 2633 .page = page,
4375a336 2634 .encrypted_page = NULL,
d68f735b 2635 .submitted = false,
4c8ff709 2636 .compr_blocks = compr_blocks,
cc15620b 2637 .need_lock = LOCK_RETRY,
b0af6d49 2638 .io_type = io_type,
578c6478 2639 .io_wbc = wbc,
8648de2c
CY		 2640 .bio = bio,
2641 .last_block = last_block,
458e6197 2642 };
eb47b800 2643
ecda0de3
CY		 2644 trace_f2fs_writepage(page, DATA);
2645
db198ae0
CY		 2646 /* we should bypass data pages to proceed the kworkder jobs */
2647 if (unlikely(f2fs_cp_error(sbi))) {
2648 mapping_set_error(page->mapping, -EIO);
1174abfd
CY		 2649 /*
2650 * don't drop any dirty dentry pages for keeping lastest
2651 * directory structure.
2652 */
2653 if (S_ISDIR(inode->i_mode))
2654 goto redirty_out;
db198ae0
CY		 2655 goto out;
2656 }
2657
0771fcc7
CY		 2658 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2659 goto redirty_out;
2660
4c8ff709
CY		 2661 if (page->index < end_index ||
2662 f2fs_verity_in_progress(inode) ||
2663 compr_blocks)
39936837 2664 goto write;
eb47b800
JK		 2665
2666 /*
2667 * If the offset is out-of-range of file size,
2668 * this page does not have to be written to disk.
2669 */
09cbfeaf 2670 offset = i_size & (PAGE_SIZE - 1);
76f60268 2671 if ((page->index >= end_index + 1) || !offset)
39936837 2672 goto out;
eb47b800 2673
09cbfeaf 2674 zero_user_segment(page, offset, PAGE_SIZE);
39936837 2675write:
1e84371f
JK		 2676 if (f2fs_is_drop_cache(inode))
2677 goto out;
e6e5f561
JK		 2678 /* we should not write 0'th page having journal header */
2679 if (f2fs_is_volatile_file(inode) && (!page->index ||
2680 (!wbc->for_reclaim &&
4d57b86d 2681 f2fs_available_free_memory(sbi, BASE_CHECK))))
1e84371f 2682 goto redirty_out;
eb47b800 2683
435cbab9
JK		 2684 /* Dentry/quota blocks are controlled by checkpoint */
2685 if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
79963d96
CY		 2686 /*
2687 * We need to wait for node_write to avoid block allocation during
2688 * checkpoint. This can only happen to quota writes which can cause
2689 * the below discard race condition.
2690 */
2691 if (IS_NOQUOTA(inode))
2692 down_read(&sbi->node_write);
2693
cc15620b 2694 fio.need_lock = LOCK_DONE;
4d57b86d 2695 err = f2fs_do_write_data_page(&fio);
79963d96
CY		 2696
2697 if (IS_NOQUOTA(inode))
2698 up_read(&sbi->node_write);
2699
8618b881
JK		 2700 goto done;
2701 }
9ffe0fb5 2702
8618b881 2703 if (!wbc->for_reclaim)
39936837 2704 need_balance_fs = true;
7f3037a5 2705 else if (has_not_enough_free_secs(sbi, 0, 0))
39936837 2706 goto redirty_out;
ef095d19
JK		 2707 else
2708 set_inode_flag(inode, FI_HOT_DATA);
eb47b800 2709
b3d208f9 2710 err = -EAGAIN;
dd7b2333 2711 if (f2fs_has_inline_data(inode)) {
b3d208f9 2712 err = f2fs_write_inline_data(inode, page);
dd7b2333
YH		 2713 if (!err)
2714 goto out;
2715 }
279d6df2 2716
cc15620b 2717 if (err == -EAGAIN) {
4d57b86d 2718 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2719 if (err == -EAGAIN) {
2720 fio.need_lock = LOCK_REQ;
4d57b86d 2721 err = f2fs_do_write_data_page(&fio);
cc15620b
JK		 2722 }
2723 }
a0d00fad 2724
eb449797
CY		 2725 if (err) {
2726 file_set_keep_isize(inode);
2727 } else {
c10c9820 2728 spin_lock(&F2FS_I(inode)->i_size_lock);
eb449797
CY		 2729 if (F2FS_I(inode)->last_disk_size < psize)
2730 F2FS_I(inode)->last_disk_size = psize;
c10c9820 2731 spin_unlock(&F2FS_I(inode)->i_size_lock);
eb449797 2732 }
279d6df2 2733
8618b881
JK		 2734done:
2735 if (err && err != -ENOENT)
2736 goto redirty_out;
eb47b800 2737
39936837 2738out:
a7ffdbe2 2739 inode_dec_dirty_pages(inode);
2baf0781 2740 if (err) {
2bca1e23 2741 ClearPageUptodate(page);
2baf0781
CY		 2742 clear_cold_data(page);
2743 }
0c3a5797
CY		 2744
2745 if (wbc->for_reclaim) {
bab475c5 2746 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
ef095d19 2747 clear_inode_flag(inode, FI_HOT_DATA);
4d57b86d 2748 f2fs_remove_dirty_inode(inode);
d68f735b 2749 submitted = NULL;
0c3a5797 2750 }
eb47b800 2751 unlock_page(page);
186857c5 2752 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
3afae09f 2753 !F2FS_I(inode)->cp_task && allow_balance)
a7881893 2754 f2fs_balance_fs(sbi, need_balance_fs);
0c3a5797 2755
d68f735b 2756 if (unlikely(f2fs_cp_error(sbi))) {
b9109b0e 2757 f2fs_submit_merged_write(sbi, DATA);
0b20fcec 2758 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
d68f735b
JK		 2759 submitted = NULL;
2760 }
2761
2762 if (submitted)
4c8ff709 2763 *submitted = fio.submitted ? 1 : 0;
0c3a5797 2764
eb47b800
JK		 2765 return 0;
2766
eb47b800 2767redirty_out:
76f60268 2768 redirty_page_for_writepage(wbc, page);
5b19d284
JK		 2769 /*
2770 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2771 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2772 * file_write_and_wait_range() will see EIO error, which is critical
2773 * to return value of fsync() followed by atomic_write failure to user.
2774 */
2775 if (!err || wbc->for_reclaim)
0002b61b 2776 return AOP_WRITEPAGE_ACTIVATE;
b230e6ca
JK		 2777 unlock_page(page);
2778 return err;
fa9150a8
NJ		 2779}
2780
f566bae8
JK		 2781static int f2fs_write_data_page(struct page *page,
2782 struct writeback_control *wbc)
2783{
4c8ff709
CY		 2784#ifdef CONFIG_F2FS_FS_COMPRESSION
2785 struct inode *inode = page->mapping->host;
2786
2787 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2788 goto out;
2789
2790 if (f2fs_compressed_file(inode)) {
2791 if (f2fs_is_compressed_cluster(inode, page->index)) {
2792 redirty_page_for_writepage(wbc, page);
2793 return AOP_WRITEPAGE_ACTIVATE;
2794 }
2795 }
2796out:
2797#endif
2798
2799 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
3afae09f 2800 wbc, FS_DATA_IO, 0, true);
f566bae8
JK		 2801}
2802
8f46dcae
CY		 2803/*
2804 * This function was copied from write_cche_pages from mm/page-writeback.c.
2805 * The major change is making write step of cold data page separately from
2806 * warm/hot data page.
2807 */
2808static int f2fs_write_cache_pages(struct address_space *mapping,
b0af6d49
CY		 2809 struct writeback_control *wbc,
2810 enum iostat_type io_type)
8f46dcae
CY		 2811{
2812 int ret = 0;
4c8ff709 2813 int done = 0, retry = 0;
8f46dcae 2814 struct pagevec pvec;
c29fd0c0 2815 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
8648de2c
CY		 2816 struct bio *bio = NULL;
2817 sector_t last_block;
4c8ff709
CY		 2818#ifdef CONFIG_F2FS_FS_COMPRESSION
2819 struct inode *inode = mapping->host;
2820 struct compress_ctx cc = {
2821 .inode = inode,
2822 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2823 .cluster_size = F2FS_I(inode)->i_cluster_size,
2824 .cluster_idx = NULL_CLUSTER,
2825 .rpages = NULL,
2826 .nr_rpages = 0,
2827 .cpages = NULL,
2828 .rbuf = NULL,
2829 .cbuf = NULL,
2830 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2831 .private = NULL,
2832 };
2833#endif
8f46dcae 2834 int nr_pages;
8f46dcae
CY		 2835 pgoff_t index;
2836 pgoff_t end; /* Inclusive */
2837 pgoff_t done_index;
8f46dcae 2838 int range_whole = 0;
10bbd235 2839 xa_mark_t tag;
bab475c5 2840 int nwritten = 0;
4c8ff709
CY		 2841 int submitted = 0;
2842 int i;
8f46dcae 2843
86679820 2844 pagevec_init(&pvec);
46ae957f 2845
ef095d19
JK		 2846 if (get_dirty_pages(mapping->host) <=
2847 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2848 set_inode_flag(mapping->host, FI_HOT_DATA);
2849 else
2850 clear_inode_flag(mapping->host, FI_HOT_DATA);
2851
8f46dcae 2852 if (wbc->range_cyclic) {
4df7a75f 2853 index = mapping->writeback_index; /* prev offset */
8f46dcae
CY		 2854 end = -1;
2855 } else {
09cbfeaf
KS		 2856 index = wbc->range_start >> PAGE_SHIFT;
2857 end = wbc->range_end >> PAGE_SHIFT;
8f46dcae
CY		 2858 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2859 range_whole = 1;
8f46dcae
CY		 2860 }
2861 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2862 tag = PAGECACHE_TAG_TOWRITE;
2863 else
2864 tag = PAGECACHE_TAG_DIRTY;
2865retry:
4c8ff709 2866 retry = 0;
8f46dcae
CY		 2867 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2868 tag_pages_for_writeback(mapping, index, end);
2869 done_index = index;
4c8ff709 2870 while (!done && !retry && (index <= end)) {
69c4f35d 2871 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
67fd707f 2872 tag);
8f46dcae
CY		 2873 if (nr_pages == 0)
2874 break;
2875
2876 for (i = 0; i < nr_pages; i++) {
2877 struct page *page = pvec.pages[i];
4c8ff709
CY		 2878 bool need_readd;
2879readd:
2880 need_readd = false;
2881#ifdef CONFIG_F2FS_FS_COMPRESSION
2882 if (f2fs_compressed_file(inode)) {
2883 ret = f2fs_init_compress_ctx(&cc);
2884 if (ret) {
2885 done = 1;
2886 break;
2887 }
2888
2889 if (!f2fs_cluster_can_merge_page(&cc,
2890 page->index)) {
2891 ret = f2fs_write_multi_pages(&cc,
2892 &submitted, wbc, io_type);
2893 if (!ret)
2894 need_readd = true;
2895 goto result;
2896 }
8f46dcae 2897
4c8ff709
CY		 2898 if (unlikely(f2fs_cp_error(sbi)))
2899 goto lock_page;
2900
2901 if (f2fs_cluster_is_empty(&cc)) {
2902 void *fsdata = NULL;
2903 struct page *pagep;
2904 int ret2;
2905
2906 ret2 = f2fs_prepare_compress_overwrite(
2907 inode, &pagep,
2908 page->index, &fsdata);
2909 if (ret2 < 0) {
2910 ret = ret2;
2911 done = 1;
2912 break;
2913 } else if (ret2 &&
2914 !f2fs_compress_write_end(inode,
2915 fsdata, page->index,
2916 1)) {
2917 retry = 1;
2918 break;
2919 }
2920 } else {
2921 goto lock_page;
2922 }
2923 }
2924#endif
f8de4331 2925 /* give a priority to WB_SYNC threads */
c29fd0c0 2926 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
f8de4331
CY		 2927 wbc->sync_mode == WB_SYNC_NONE) {
2928 done = 1;
2929 break;
2930 }
4c8ff709
CY		 2931#ifdef CONFIG_F2FS_FS_COMPRESSION
2932lock_page:
2933#endif
8f46dcae 2934 done_index = page->index;
d29460e5 2935retry_write:
8f46dcae
CY		 2936 lock_page(page);
2937
2938 if (unlikely(page->mapping != mapping)) {
2939continue_unlock:
2940 unlock_page(page);
2941 continue;
2942 }
2943
2944 if (!PageDirty(page)) {
2945 /* someone wrote it for us */
2946 goto continue_unlock;
2947 }
2948
8f46dcae 2949 if (PageWriteback(page)) {
0b20fcec 2950 if (wbc->sync_mode != WB_SYNC_NONE)
fec1d657 2951 f2fs_wait_on_page_writeback(page,
bae0ee7a 2952 DATA, true, true);
0b20fcec 2953 else
8f46dcae
CY		 2954 goto continue_unlock;
2955 }
2956
8f46dcae
CY		 2957 if (!clear_page_dirty_for_io(page))
2958 goto continue_unlock;
2959
4c8ff709
CY		 2960#ifdef CONFIG_F2FS_FS_COMPRESSION
2961 if (f2fs_compressed_file(inode)) {
2962 get_page(page);
2963 f2fs_compress_ctx_add_page(&cc, page);
2964 continue;
2965 }
2966#endif
2967 ret = f2fs_write_single_data_page(page, &submitted,
3afae09f
CY		 2968 &bio, &last_block, wbc, io_type,
2969 0, true);
4c8ff709
CY		 2970 if (ret == AOP_WRITEPAGE_ACTIVATE)
2971 unlock_page(page);
2972#ifdef CONFIG_F2FS_FS_COMPRESSION
2973result:
2974#endif
2975 nwritten += submitted;
2976 wbc->nr_to_write -= submitted;
2977
8f46dcae 2978 if (unlikely(ret)) {
0002b61b
CY		 2979 /*
2980 * keep nr_to_write, since vfs uses this to
2981 * get # of written pages.
2982 */
2983 if (ret == AOP_WRITEPAGE_ACTIVATE) {
0002b61b 2984 ret = 0;
4c8ff709 2985 goto next;
d29460e5
JK		 2986 } else if (ret == -EAGAIN) {
2987 ret = 0;
2988 if (wbc->sync_mode == WB_SYNC_ALL) {
2989 cond_resched();
2990 congestion_wait(BLK_RW_ASYNC,
5df7731f 2991 DEFAULT_IO_TIMEOUT);
d29460e5
JK		 2992 goto retry_write;
2993 }
4c8ff709 2994 goto next;
0002b61b 2995 }
b230e6ca
JK		 2996 done_index = page->index + 1;
2997 done = 1;
2998 break;
8f46dcae
CY		 2999 }
3000
4c8ff709 3001 if (wbc->nr_to_write <= 0 &&
687de7f1 3002 wbc->sync_mode == WB_SYNC_NONE) {
8f46dcae
CY		 3003 done = 1;
3004 break;
3005 }
4c8ff709
CY		 3006next:
3007 if (need_readd)
3008 goto readd;
8f46dcae
CY		 3009 }
3010 pagevec_release(&pvec);
3011 cond_resched();
3012 }
4c8ff709
CY		 3013#ifdef CONFIG_F2FS_FS_COMPRESSION
3014 /* flush remained pages in compress cluster */
3015 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
3016 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
3017 nwritten += submitted;
3018 wbc->nr_to_write -= submitted;
3019 if (ret) {
3020 done = 1;
3021 retry = 0;
3022 }
3023 }
adfc6943
JK		 3024 if (f2fs_compressed_file(inode))
3025 f2fs_destroy_compress_ctx(&cc);
4c8ff709 3026#endif
e78790f8 3027 if (retry) {
8f46dcae 3028 index = 0;
e78790f8 3029 end = -1;
8f46dcae
CY		 3030 goto retry;
3031 }
e78790f8
ST		 3032 if (wbc->range_cyclic && !done)
3033 done_index = 0;
8f46dcae
CY		 3034 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
3035 mapping->writeback_index = done_index;
3036
bab475c5 3037 if (nwritten)
b9109b0e 3038 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
bab475c5 3039 NULL, 0, DATA);
8648de2c
CY		 3040 /* submit cached bio of IPU write */
3041 if (bio)
0b20fcec 3042 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
6ca56ca4 3043
8f46dcae
CY		 3044 return ret;
3045}
3046
853137ce
JK		 3047static inline bool __should_serialize_io(struct inode *inode,
3048 struct writeback_control *wbc)
3049{
b13f67ff
CY		 3050 /* to avoid deadlock in path of data flush */
3051 if (F2FS_I(inode)->cp_task)
3052 return false;
3053
853137ce
JK		 3054 if (!S_ISREG(inode->i_mode))
3055 return false;
af033b2a
CY		 3056 if (IS_NOQUOTA(inode))
3057 return false;
b13f67ff 3058
602a16d5 3059 if (f2fs_need_compress_data(inode))
b13f67ff 3060 return true;
853137ce
JK		 3061 if (wbc->sync_mode != WB_SYNC_ALL)
3062 return true;
3063 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
3064 return true;
3065 return false;
3066}
3067
fc99fe27 3068static int __f2fs_write_data_pages(struct address_space *mapping,
b0af6d49
CY		 3069 struct writeback_control *wbc,
3070 enum iostat_type io_type)
eb47b800
JK		 3071{
3072 struct inode *inode = mapping->host;
4081363f 3073 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
9dfa1baf 3074 struct blk_plug plug;
eb47b800 3075 int ret;
853137ce 3076 bool locked = false;
eb47b800 3077
cfb185a1 3078 /* deal with chardevs and other special file */
3079 if (!mapping->a_ops->writepage)
3080 return 0;
3081
6a290544
CY		 3082 /* skip writing if there is no dirty page in this inode */
3083 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3084 return 0;
3085
0771fcc7
CY		 3086 /* during POR, we don't need to trigger writepage at all. */
3087 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3088 goto skip_write;
3089
af033b2a
CY		 3090 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3091 wbc->sync_mode == WB_SYNC_NONE &&
a1257023 3092 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
4d57b86d 3093 f2fs_available_free_memory(sbi, DIRTY_DENTS))
a1257023
JK		 3094 goto skip_write;
3095
d323d005 3096 /* skip writing during file defragment */
91942321 3097 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
d323d005
CY		 3098 goto skip_write;
3099
d31c7c3f
YH		 3100 trace_f2fs_writepages(mapping->host, wbc, DATA);
3101
687de7f1
JK		 3102 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
3103 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0
CY		 3104 atomic_inc(&sbi->wb_sync_req[DATA]);
3105 else if (atomic_read(&sbi->wb_sync_req[DATA]))
687de7f1
JK		 3106 goto skip_write;
3107
853137ce
JK		 3108 if (__should_serialize_io(inode, wbc)) {
3109 mutex_lock(&sbi->writepages);
3110 locked = true;
3111 }
3112
9dfa1baf 3113 blk_start_plug(&plug);
b0af6d49 3114 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
9dfa1baf 3115 blk_finish_plug(&plug);
687de7f1 3116
853137ce
JK		 3117 if (locked)
3118 mutex_unlock(&sbi->writepages);
3119
687de7f1 3120 if (wbc->sync_mode == WB_SYNC_ALL)
c29fd0c0 3121 atomic_dec(&sbi->wb_sync_req[DATA]);
28ea6162
JK		 3122 /*
3123 * if some pages were truncated, we cannot guarantee its mapping->host
3124 * to detect pending bios.
3125 */
458e6197 3126
4d57b86d 3127 f2fs_remove_dirty_inode(inode);
eb47b800 3128 return ret;
d3baf95d
JK		 3129
3130skip_write:
a7ffdbe2 3131 wbc->pages_skipped += get_dirty_pages(inode);
d31c7c3f 3132 trace_f2fs_writepages(mapping->host, wbc, DATA);
d3baf95d 3133 return 0;
eb47b800
JK		 3134}
3135
b0af6d49
CY		 3136static int f2fs_write_data_pages(struct address_space *mapping,
3137 struct writeback_control *wbc)
3138{
3139 struct inode *inode = mapping->host;
3140
3141 return __f2fs_write_data_pages(mapping, wbc,
3142 F2FS_I(inode)->cp_task == current ?
3143 FS_CP_DATA_IO : FS_DATA_IO);
3144}
3145
3aab8f82
CY		 3146static void f2fs_write_failed(struct address_space *mapping, loff_t to)
3147{
3148 struct inode *inode = mapping->host;
819d9153 3149 loff_t i_size = i_size_read(inode);
3aab8f82 3150
3f188c23
JK		 3151 if (IS_NOQUOTA(inode))
3152 return;
3153
95ae251f
EB		 3154 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
3155 if (to > i_size && !f2fs_verity_in_progress(inode)) {
a33c1502 3156 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
6f8d4455 3157 down_write(&F2FS_I(inode)->i_mmap_sem);
a33c1502 3158
819d9153 3159 truncate_pagecache(inode, i_size);
3f188c23 3160 f2fs_truncate_blocks(inode, i_size, true);
a33c1502 3161
5a3a2d83 3162 up_write(&F2FS_I(inode)->i_mmap_sem);
6f8d4455 3163 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3aab8f82
CY		 3164 }
3165}
3166
2aadac08
JK		 3167static int prepare_write_begin(struct f2fs_sb_info *sbi,
3168 struct page *page, loff_t pos, unsigned len,
3169 block_t *blk_addr, bool *node_changed)
3170{
3171 struct inode *inode = page->mapping->host;
3172 pgoff_t index = page->index;
3173 struct dnode_of_data dn;
3174 struct page *ipage;
b4d07a3e 3175 bool locked = false;
e15882b6 3176 struct extent_info ei = {0,0,0};
2aadac08 3177 int err = 0;
2866fb16 3178 int flag;
2aadac08 3179
24b84912
JK		 3180 /*
3181 * we already allocated all the blocks, so we don't need to get
3182 * the block addresses when there is no need to fill the page.
3183 */
dc91de78 3184 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
95ae251f
EB		 3185 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
3186 !f2fs_verity_in_progress(inode))
24b84912
JK		 3187 return 0;
3188
2866fb16
SY		 3189 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
3190 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3191 flag = F2FS_GET_BLOCK_DEFAULT;
3192 else
3193 flag = F2FS_GET_BLOCK_PRE_AIO;
3194
b4d07a3e 3195 if (f2fs_has_inline_data(inode) ||
09cbfeaf 3196 (pos & PAGE_MASK) >= i_size_read(inode)) {
0ef81833 3197 f2fs_do_map_lock(sbi, flag, true);
b4d07a3e
JK		 3198 locked = true;
3199 }
4c8ff709 3200
b4d07a3e 3201restart:
2aadac08 3202 /* check inline_data */
4d57b86d 3203 ipage = f2fs_get_node_page(sbi, inode->i_ino);
2aadac08
JK		 3204 if (IS_ERR(ipage)) {
3205 err = PTR_ERR(ipage);
3206 goto unlock_out;
3207 }
3208
3209 set_new_dnode(&dn, inode, ipage, ipage, 0);
3210
3211 if (f2fs_has_inline_data(inode)) {
f2470371 3212 if (pos + len <= MAX_INLINE_DATA(inode)) {
4d57b86d 3213 f2fs_do_read_inline_data(page, ipage);
91942321 3214 set_inode_flag(inode, FI_DATA_EXIST);
ab47036d
CY		 3215 if (inode->i_nlink)
3216 set_inline_node(ipage);
2aadac08
JK		 3217 } else {
3218 err = f2fs_convert_inline_page(&dn, page);
3219 if (err)
b4d07a3e
JK		 3220 goto out;
3221 if (dn.data_blkaddr == NULL_ADDR)
3222 err = f2fs_get_block(&dn, index);
3223 }
3224 } else if (locked) {
3225 err = f2fs_get_block(&dn, index);
3226 } else {
3227 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3228 dn.data_blkaddr = ei.blk + index - ei.fofs;
3229 } else {
b4d07a3e 3230 /* hole case */
4d57b86d 3231 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
4da7bf5a 3232 if (err || dn.data_blkaddr == NULL_ADDR) {
b4d07a3e 3233 f2fs_put_dnode(&dn);
0ef81833 3234 f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
59c9081b 3235 true);
2866fb16 3236 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
b4d07a3e
JK		 3237 locked = true;
3238 goto restart;
3239 }
2aadac08
JK		 3240 }
3241 }
b4d07a3e 3242
2aadac08
JK		 3243 /* convert_inline_page can make node_changed */
3244 *blk_addr = dn.data_blkaddr;
3245 *node_changed = dn.node_changed;
b4d07a3e 3246out:
2aadac08
JK		 3247 f2fs_put_dnode(&dn);
3248unlock_out:
b4d07a3e 3249 if (locked)
0ef81833 3250 f2fs_do_map_lock(sbi, flag, false);
2aadac08
JK		 3251 return err;
3252}
3253
eb47b800
JK		 3254static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3255 loff_t pos, unsigned len, unsigned flags,
3256 struct page **pagep, void **fsdata)
3257{
3258 struct inode *inode = mapping->host;
4081363f 3259 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86531d6b 3260 struct page *page = NULL;
09cbfeaf 3261 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
a2e2e76b 3262 bool need_balance = false, drop_atomic = false;
2aadac08 3263 block_t blkaddr = NULL_ADDR;
eb47b800
JK		 3264 int err = 0;
3265
62aed044
CY		 3266 trace_f2fs_write_begin(inode, pos, len, flags);
3267
00e09c0b
CY		 3268 if (!f2fs_is_checkpoint_ready(sbi)) {
3269 err = -ENOSPC;
4354994f 3270 goto fail;
00e09c0b 3271 }
4354994f 3272
455e3a58
JK		 3273 if ((f2fs_is_atomic_file(inode) &&
3274 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3275 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
57864ae5 3276 err = -ENOMEM;
a2e2e76b 3277 drop_atomic = true;
57864ae5
JK		 3278 goto fail;
3279 }
3280
5f727395
JK		 3281 /*
3282 * We should check this at this moment to avoid deadlock on inode page
3283 * and #0 page. The locking rule for inline_data conversion should be:
3284 * lock_page(page #0) -> lock_page(inode_page)
3285 */
3286 if (index != 0) {
3287 err = f2fs_convert_inline_inode(inode);
3288 if (err)
3289 goto fail;
3290 }
4c8ff709
CY		 3291
3292#ifdef CONFIG_F2FS_FS_COMPRESSION
3293 if (f2fs_compressed_file(inode)) {
3294 int ret;
3295
3296 *fsdata = NULL;
3297
3298 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3299 index, fsdata);
3300 if (ret < 0) {
3301 err = ret;
3302 goto fail;
3303 } else if (ret) {
3304 return 0;
3305 }
3306 }
3307#endif
3308
afcb7ca0 3309repeat:
86d54795
JK		 3310 /*
3311 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
3312 * wait_for_stable_page. Will wait that below with our IO control.
3313 */
01eccef7 3314 page = f2fs_pagecache_get_page(mapping, index,
86d54795 3315 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3aab8f82
CY		 3316 if (!page) {
3317 err = -ENOMEM;
3318 goto fail;
3319 }
d5f66990 3320
4c8ff709
CY		 3321 /* TODO: cluster can be compressed due to race with .writepage */
3322
eb47b800
JK		 3323 *pagep = page;
3324
2aadac08
JK		 3325 err = prepare_write_begin(sbi, page, pos, len,
3326 &blkaddr, &need_balance);
9ba69cf9 3327 if (err)
2aadac08 3328 goto fail;
9ba69cf9 3329
af033b2a
CY		 3330 if (need_balance && !IS_NOQUOTA(inode) &&
3331 has_not_enough_free_secs(sbi, 0, 0)) {
2a340760 3332 unlock_page(page);
2c4db1a6 3333 f2fs_balance_fs(sbi, true);
2a340760
JK		 3334 lock_page(page);
3335 if (page->mapping != mapping) {
3336 /* The page got truncated from under us */
3337 f2fs_put_page(page, 1);
3338 goto repeat;
3339 }
3340 }
3341
bae0ee7a 3342 f2fs_wait_on_page_writeback(page, DATA, false, true);
b3d208f9 3343
649d7df2
JK		 3344 if (len == PAGE_SIZE || PageUptodate(page))
3345 return 0;
eb47b800 3346
95ae251f
EB		 3347 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3348 !f2fs_verity_in_progress(inode)) {
746e2403
YH		 3349 zero_user_segment(page, len, PAGE_SIZE);
3350 return 0;
3351 }
3352
2aadac08 3353 if (blkaddr == NEW_ADDR) {
09cbfeaf 3354 zero_user_segment(page, 0, PAGE_SIZE);
649d7df2 3355 SetPageUptodate(page);
eb47b800 3356 } else {
93770ab7
CY		 3357 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3358 DATA_GENERIC_ENHANCE_READ)) {
10f966bb 3359 err = -EFSCORRUPTED;
93770ab7
CY		 3360 goto fail;
3361 }
b7973091 3362 err = f2fs_submit_page_read(inode, page, blkaddr, 0, true);
13ba41e3 3363 if (err)
78682f79 3364 goto fail;
d54c795b 3365
393ff91f 3366 lock_page(page);
6bacf52f 3367 if (unlikely(page->mapping != mapping)) {
afcb7ca0
JK		 3368 f2fs_put_page(page, 1);
3369 goto repeat;
eb47b800 3370 }
1563ac75
CY		 3371 if (unlikely(!PageUptodate(page))) {
3372 err = -EIO;
3373 goto fail;
4375a336 3374 }
eb47b800 3375 }
eb47b800 3376 return 0;
9ba69cf9 3377
3aab8f82 3378fail:
86531d6b 3379 f2fs_put_page(page, 1);
3aab8f82 3380 f2fs_write_failed(mapping, pos + len);
a2e2e76b 3381 if (drop_atomic)
4d57b86d 3382 f2fs_drop_inmem_pages_all(sbi, false);
3aab8f82 3383 return err;
eb47b800
JK		 3384}
3385
a1dd3c13
JK		 3386static int f2fs_write_end(struct file *file,
3387 struct address_space *mapping,
3388 loff_t pos, unsigned len, unsigned copied,
3389 struct page *page, void *fsdata)
3390{
3391 struct inode *inode = page->mapping->host;
3392
dfb2bf38
CY		 3393 trace_f2fs_write_end(inode, pos, len, copied);
3394
649d7df2
JK		 3395 /*
3396 * This should be come from len == PAGE_SIZE, and we expect copied
3397 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
3398 * let generic_perform_write() try to copy data again through copied=0.
3399 */
3400 if (!PageUptodate(page)) {
746e2403 3401 if (unlikely(copied != len))
649d7df2
JK		 3402 copied = 0;
3403 else
3404 SetPageUptodate(page);
3405 }
4c8ff709
CY		 3406
3407#ifdef CONFIG_F2FS_FS_COMPRESSION
3408 /* overwrite compressed file */
3409 if (f2fs_compressed_file(inode) && fsdata) {
3410 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3411 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
944dd22e
CY		 3412
3413 if (pos + copied > i_size_read(inode) &&
3414 !f2fs_verity_in_progress(inode))
3415 f2fs_i_size_write(inode, pos + copied);
4c8ff709
CY		 3416 return copied;
3417 }
3418#endif
3419
649d7df2
JK		 3420 if (!copied)
3421 goto unlock_out;
3422
34ba94ba 3423 set_page_dirty(page);
a1dd3c13 3424
95ae251f
EB		 3425 if (pos + copied > i_size_read(inode) &&
3426 !f2fs_verity_in_progress(inode))
fc9581c8 3427 f2fs_i_size_write(inode, pos + copied);
649d7df2 3428unlock_out:
3024c9a1 3429 f2fs_put_page(page, 1);
d0239e1b 3430 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
a1dd3c13
JK		 3431 return copied;
3432}
3433
6f673763
OS		 3434static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
3435 loff_t offset)
944fcfc1 3436{
8a56dd96
JK		 3437 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
3438 unsigned blkbits = i_blkbits;
3439 unsigned blocksize_mask = (1 << blkbits) - 1;
3440 unsigned long align = offset | iov_iter_alignment(iter);
3441 struct block_device *bdev = inode->i_sb->s_bdev;
3442
20d0a107
GKB		 3443 if (iov_iter_rw(iter) == READ && offset >= i_size_read(inode))
3444 return 1;
3445
8a56dd96
JK		 3446 if (align & blocksize_mask) {
3447 if (bdev)
3448 blkbits = blksize_bits(bdev_logical_block_size(bdev));
3449 blocksize_mask = (1 << blkbits) - 1;
3450 if (align & blocksize_mask)
3451 return -EINVAL;
3452 return 1;
3453 }
944fcfc1
JK		 3454 return 0;
3455}
3456
02b16d0a
CY		 3457static void f2fs_dio_end_io(struct bio *bio)
3458{
3459 struct f2fs_private_dio *dio = bio->bi_private;
3460
3461 dec_page_count(F2FS_I_SB(dio->inode),
3462 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3463
3464 bio->bi_private = dio->orig_private;
3465 bio->bi_end_io = dio->orig_end_io;
3466
c8eb7024 3467 kfree(dio);
02b16d0a
CY		 3468
3469 bio_endio(bio);
3470}
3471
3472static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
3473 loff_t file_offset)
3474{
3475 struct f2fs_private_dio *dio;
3476 bool write = (bio_op(bio) == REQ_OP_WRITE);
02b16d0a
CY		 3477
3478 dio = f2fs_kzalloc(F2FS_I_SB(inode),
3479 sizeof(struct f2fs_private_dio), GFP_NOFS);
8e114038 3480 if (!dio)
02b16d0a 3481 goto out;
02b16d0a
CY		 3482
3483 dio->inode = inode;
3484 dio->orig_end_io = bio->bi_end_io;
3485 dio->orig_private = bio->bi_private;
3486 dio->write = write;
3487
3488 bio->bi_end_io = f2fs_dio_end_io;
3489 bio->bi_private = dio;
3490
3491 inc_page_count(F2FS_I_SB(inode),
3492 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3493
3494 submit_bio(bio);
3495 return;
3496out:
3497 bio->bi_status = BLK_STS_IOERR;
3498 bio_endio(bio);
3499}
3500
c8b8e32d 3501static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
eb47b800 3502{
b439b103 3503 struct address_space *mapping = iocb->ki_filp->f_mapping;
3aab8f82 3504 struct inode *inode = mapping->host;
0cdd3195 3505 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
f847c699 3506 struct f2fs_inode_info *fi = F2FS_I(inode);
3aab8f82 3507 size_t count = iov_iter_count(iter);
c8b8e32d 3508 loff_t offset = iocb->ki_pos;
82e0a5aa 3509 int rw = iov_iter_rw(iter);
3aab8f82 3510 int err;
0cdd3195 3511 enum rw_hint hint = iocb->ki_hint;
63189b78 3512 int whint_mode = F2FS_OPTION(sbi).whint_mode;
f847c699 3513 bool do_opu;
944fcfc1 3514
b439b103 3515 err = check_direct_IO(inode, iter, offset);
b9d777b8 3516 if (err)
8a56dd96 3517 return err < 0 ? err : 0;
9ffe0fb5 3518
f847c699 3519 if (f2fs_force_buffered_io(inode, iocb, iter))
36abef4e 3520 return 0;
fcc85a4d 3521
f847c699
CY		 3522 do_opu = allow_outplace_dio(inode, iocb, iter);
3523
5302fb00 3524 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
70407fad 3525
0cdd3195
HL		 3526 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
3527 iocb->ki_hint = WRITE_LIFE_NOT_SET;
3528
f847c699
CY		 3529 if (iocb->ki_flags & IOCB_NOWAIT) {
3530 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
3531 iocb->ki_hint = hint;
3532 err = -EAGAIN;
3533 goto out;
3534 }
3535 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
3536 up_read(&fi->i_gc_rwsem[rw]);
b91050a8
HL		 3537 iocb->ki_hint = hint;
3538 err = -EAGAIN;
3539 goto out;
3540 }
f847c699
CY		 3541 } else {
3542 down_read(&fi->i_gc_rwsem[rw]);
3543 if (do_opu)
3544 down_read(&fi->i_gc_rwsem[READ]);
b91050a8
HL		 3545 }
3546
02b16d0a 3547 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
f9d6d059
CY		 3548 iter, rw == WRITE ? get_data_block_dio_write :
3549 get_data_block_dio, NULL, f2fs_dio_submit_bio,
ad8d6a02
D		 3550 rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
3551 DIO_SKIP_HOLES);
f847c699
CY		 3552
3553 if (do_opu)
3554 up_read(&fi->i_gc_rwsem[READ]);
3555
3556 up_read(&fi->i_gc_rwsem[rw]);
82e0a5aa
CY		 3557
3558 if (rw == WRITE) {
0cdd3195
HL		 3559 if (whint_mode == WHINT_MODE_OFF)
3560 iocb->ki_hint = hint;
b0af6d49
CY		 3561 if (err > 0) {
3562 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3563 err);
f847c699
CY		 3564 if (!do_opu)
3565 set_inode_flag(inode, FI_UPDATE_WRITE);
335cac8b
JQ		 3566 } else if (err == -EIOCBQUEUED) {
3567 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3568 count - iov_iter_count(iter));
b0af6d49 3569 } else if (err < 0) {
6bfc4919 3570 f2fs_write_failed(mapping, offset + count);
b0af6d49 3571 }
8b83ac81
CY		 3572 } else {
3573 if (err > 0)
3574 f2fs_update_iostat(sbi, APP_DIRECT_READ_IO, err);
335cac8b
JQ		 3575 else if (err == -EIOCBQUEUED)
3576 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_READ_IO,
3577 count - iov_iter_count(iter));
6bfc4919 3578 }
70407fad 3579
b91050a8 3580out:
5302fb00 3581 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
70407fad 3582
3aab8f82 3583 return err;
eb47b800
JK		 3584}
3585
487261f3
CY		 3586void f2fs_invalidate_page(struct page *page, unsigned int offset,
3587 unsigned int length)
eb47b800
JK		 3588{
3589 struct inode *inode = page->mapping->host;
487261f3 3590 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
a7ffdbe2 3591
487261f3 3592 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
09cbfeaf 3593 (offset % PAGE_SIZE || length != PAGE_SIZE))
a7ffdbe2
JK		 3594 return;
3595
487261f3 3596 if (PageDirty(page)) {
933439c8 3597 if (inode->i_ino == F2FS_META_INO(sbi)) {
487261f3 3598 dec_page_count(sbi, F2FS_DIRTY_META);
933439c8 3599 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
487261f3 3600 dec_page_count(sbi, F2FS_DIRTY_NODES);
933439c8 3601 } else {
487261f3 3602 inode_dec_dirty_pages(inode);
4d57b86d 3603 f2fs_remove_dirty_inode(inode);
933439c8 3604 }
487261f3 3605 }
decd36b6 3606
2baf0781
CY		 3607 clear_cold_data(page);
3608
decd36b6 3609 if (IS_ATOMIC_WRITTEN_PAGE(page))
4d57b86d 3610 return f2fs_drop_inmem_page(inode, page);
decd36b6 3611
240a5915 3612 f2fs_clear_page_private(page);
eb47b800
JK		 3613}
3614
487261f3 3615int f2fs_release_page(struct page *page, gfp_t wait)
eb47b800 3616{
f68daeeb
JK		 3617 /* If this is dirty page, keep PagePrivate */
3618 if (PageDirty(page))
3619 return 0;
3620
decd36b6
CY		 3621 /* This is atomic written page, keep Private */
3622 if (IS_ATOMIC_WRITTEN_PAGE(page))
3623 return 0;
3624
2baf0781 3625 clear_cold_data(page);
240a5915 3626 f2fs_clear_page_private(page);
c3850aa1 3627 return 1;
eb47b800
JK		 3628}
3629
3630static int f2fs_set_data_page_dirty(struct page *page)
3631{
4969c06a 3632 struct inode *inode = page_file_mapping(page)->host;
eb47b800 3633
26c6b887
JK		 3634 trace_f2fs_set_page_dirty(page, DATA);
3635
237c0790
JK		 3636 if (!PageUptodate(page))
3637 SetPageUptodate(page);
4969c06a
JK		 3638 if (PageSwapCache(page))
3639 return __set_page_dirty_nobuffers(page);
34ba94ba 3640
5fe45743 3641 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
decd36b6 3642 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
4d57b86d 3643 f2fs_register_inmem_page(inode, page);
decd36b6
CY		 3644 return 1;
3645 }
3646 /*
3647 * Previously, this page has been registered, we just
3648 * return here.
3649 */
3650 return 0;
34ba94ba
JK		 3651 }
3652
eb47b800 3653 if (!PageDirty(page)) {
b87078ad 3654 __set_page_dirty_nobuffers(page);
4d57b86d 3655 f2fs_update_dirty_page(inode, page);
eb47b800
JK		 3656 return 1;
3657 }
3658 return 0;
3659}
3660
c1c63387
CY		 3661
3662static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block)
3663{
3664#ifdef CONFIG_F2FS_FS_COMPRESSION
3665 struct dnode_of_data dn;
3666 sector_t start_idx, blknr = 0;
3667 int ret;
3668
3669 start_idx = round_down(block, F2FS_I(inode)->i_cluster_size);
3670
3671 set_new_dnode(&dn, inode, NULL, NULL, 0);
3672 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
3673 if (ret)
3674 return 0;
3675
3676 if (dn.data_blkaddr != COMPRESS_ADDR) {
3677 dn.ofs_in_node += block - start_idx;
3678 blknr = f2fs_data_blkaddr(&dn);
3679 if (!__is_valid_data_blkaddr(blknr))
3680 blknr = 0;
3681 }
3682
3683 f2fs_put_dnode(&dn);
c1c63387
CY		 3684 return blknr;
3685#else
250e84d7 3686 return 0;
c1c63387
CY		 3687#endif
3688}
3689
3690
c01e54b7
JK		 3691static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3692{
454ae7e5 3693 struct inode *inode = mapping->host;
b79b0a31 3694 sector_t blknr = 0;
454ae7e5 3695
1d373a0e 3696 if (f2fs_has_inline_data(inode))
b79b0a31 3697 goto out;
1d373a0e
JK		 3698
3699 /* make sure allocating whole blocks */
3700 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3701 filemap_write_and_wait(mapping);
3702
4eda1682 3703 /* Block number less than F2FS MAX BLOCKS */
6d1451bf 3704 if (unlikely(block >= max_file_blocks(inode)))
4eda1682 3705 goto out;
c1c63387 3706
4eda1682
DJ		 3707 if (f2fs_compressed_file(inode)) {
3708 blknr = f2fs_bmap_compress(inode, block);
3709 } else {
b876f4c9
JK		 3710 struct f2fs_map_blocks map;
3711
3712 memset(&map, 0, sizeof(map));
3713 map.m_lblk = block;
3714 map.m_len = 1;
3715 map.m_next_pgofs = NULL;
3716 map.m_seg_type = NO_CHECK_TYPE;
3717
3718 if (!f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_BMAP))
3719 blknr = map.m_pblk;
4eda1682 3720 }
b79b0a31
CY		 3721out:
3722 trace_f2fs_bmap(inode, block, blknr);
3723 return blknr;
429511cd
CY		 3724}
3725
5b7a487c
WG		 3726#ifdef CONFIG_MIGRATION
3727#include <linux/migrate.h>
3728
3729int f2fs_migrate_page(struct address_space *mapping,
3730 struct page *newpage, struct page *page, enum migrate_mode mode)
3731{
3732 int rc, extra_count;
3733 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3734 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
3735
3736 BUG_ON(PageWriteback(page));
3737
3738 /* migrating an atomic written page is safe with the inmem_lock hold */
ff1048e7
JK		 3739 if (atomic_written) {
3740 if (mode != MIGRATE_SYNC)
3741 return -EBUSY;
3742 if (!mutex_trylock(&fi->inmem_lock))
3743 return -EAGAIN;
3744 }
5b7a487c 3745
240a5915
CY		 3746 /* one extra reference was held for atomic_write page */
3747 extra_count = atomic_written ? 1 : 0;
5b7a487c 3748 rc = migrate_page_move_mapping(mapping, newpage,
37109694 3749 page, extra_count);
5b7a487c
WG		 3750 if (rc != MIGRATEPAGE_SUCCESS) {
3751 if (atomic_written)
3752 mutex_unlock(&fi->inmem_lock);
3753 return rc;
3754 }
3755
3756 if (atomic_written) {
3757 struct inmem_pages *cur;
3758 list_for_each_entry(cur, &fi->inmem_pages, list)
3759 if (cur->page == page) {
3760 cur->page = newpage;
3761 break;
3762 }
3763 mutex_unlock(&fi->inmem_lock);
3764 put_page(page);
3765 get_page(newpage);
3766 }
3767
240a5915
CY		 3768 if (PagePrivate(page)) {
3769 f2fs_set_page_private(newpage, page_private(page));
3770 f2fs_clear_page_private(page);
3771 }
5b7a487c 3772
2916ecc0
JG		 3773 if (mode != MIGRATE_SYNC_NO_COPY)
3774 migrate_page_copy(newpage, page);
3775 else
3776 migrate_page_states(newpage, page);
5b7a487c
WG		 3777
3778 return MIGRATEPAGE_SUCCESS;
3779}
3780#endif
3781
4969c06a 3782#ifdef CONFIG_SWAP
af4b6b8e
CY		 3783static int check_swap_activate_fast(struct swap_info_struct *sis,
3784 struct file *swap_file, sector_t *span)
3785{
3786 struct address_space *mapping = swap_file->f_mapping;
3787 struct inode *inode = mapping->host;
3788 sector_t cur_lblock;
3789 sector_t last_lblock;
3790 sector_t pblock;
3791 sector_t lowest_pblock = -1;
3792 sector_t highest_pblock = 0;
3793 int nr_extents = 0;
3794 unsigned long nr_pblocks;
963ba7f9 3795 u64 len;
af4b6b8e
CY		 3796 int ret;
3797
3798 /*
3799 * Map all the blocks into the extent list. This code doesn't try
3800 * to be very smart.
3801 */
3802 cur_lblock = 0;
6cbfcab5 3803 last_lblock = bytes_to_blks(inode, i_size_read(inode));
af4b6b8e
CY		 3804 len = i_size_read(inode);
3805
3806 while (cur_lblock <= last_lblock && cur_lblock < sis->max) {
b876f4c9 3807 struct f2fs_map_blocks map;
af4b6b8e
CY		 3808 pgoff_t next_pgofs;
3809
3810 cond_resched();
3811
b876f4c9
JK		 3812 memset(&map, 0, sizeof(map));
3813 map.m_lblk = cur_lblock;
3814 map.m_len = bytes_to_blks(inode, len) - cur_lblock;
3815 map.m_next_pgofs = &next_pgofs;
3816 map.m_seg_type = NO_CHECK_TYPE;
af4b6b8e 3817
b876f4c9 3818 ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
af4b6b8e
CY		 3819 if (ret)
3820 goto err_out;
3821
3822 /* hole */
b876f4c9 3823 if (!(map.m_flags & F2FS_MAP_FLAGS))
af4b6b8e
CY		 3824 goto err_out;
3825
b876f4c9
JK		 3826 pblock = map.m_pblk;
3827 nr_pblocks = map.m_len;
af4b6b8e
CY		 3828
3829 if (cur_lblock + nr_pblocks >= sis->max)
3830 nr_pblocks = sis->max - cur_lblock;
3831
3832 if (cur_lblock) { /* exclude the header page */
3833 if (pblock < lowest_pblock)
3834 lowest_pblock = pblock;
3835 if (pblock + nr_pblocks - 1 > highest_pblock)
3836 highest_pblock = pblock + nr_pblocks - 1;
3837 }
3838
3839 /*
3840 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3841 */
3842 ret = add_swap_extent(sis, cur_lblock, nr_pblocks, pblock);
3843 if (ret < 0)
3844 goto out;
3845 nr_extents += ret;
3846 cur_lblock += nr_pblocks;
3847 }
3848 ret = nr_extents;
3849 *span = 1 + highest_pblock - lowest_pblock;
3850 if (cur_lblock == 0)
3851 cur_lblock = 1; /* force Empty message */
3852 sis->max = cur_lblock;
3853 sis->pages = cur_lblock - 1;
3854 sis->highest_bit = cur_lblock - 1;
3855out:
3856 return ret;
3857err_out:
3858 pr_err("swapon: swapfile has holes\n");
3859 return -EINVAL;
3860}
3861
4969c06a 3862/* Copied from generic_swapfile_activate() to check any holes */
3e5e479a
CY		 3863static int check_swap_activate(struct swap_info_struct *sis,
3864 struct file *swap_file, sector_t *span)
4969c06a
JK		 3865{
3866 struct address_space *mapping = swap_file->f_mapping;
3867 struct inode *inode = mapping->host;
3868 unsigned blocks_per_page;
3869 unsigned long page_no;
4969c06a
JK		 3870 sector_t probe_block;
3871 sector_t last_block;
3872 sector_t lowest_block = -1;
3873 sector_t highest_block = 0;
3e5e479a
CY		 3874 int nr_extents = 0;
3875 int ret;
4969c06a 3876
af4b6b8e
CY		 3877 if (PAGE_SIZE == F2FS_BLKSIZE)
3878 return check_swap_activate_fast(sis, swap_file, span);
3879
43b9d4b4 3880 blocks_per_page = bytes_to_blks(inode, PAGE_SIZE);
4969c06a
JK		 3881
3882 /*
3883 * Map all the blocks into the extent list. This code doesn't try
3884 * to be very smart.
3885 */
3886 probe_block = 0;
3887 page_no = 0;
43b9d4b4 3888 last_block = bytes_to_blks(inode, i_size_read(inode));
3e5e479a
CY		 3889 while ((probe_block + blocks_per_page) <= last_block &&
3890 page_no < sis->max) {
4969c06a
JK		 3891 unsigned block_in_page;
3892 sector_t first_block;
30460e1e
CM		 3893 sector_t block = 0;
3894 int err = 0;
4969c06a
JK		 3895
3896 cond_resched();
3897
30460e1e
CM		 3898 block = probe_block;
3899 err = bmap(inode, &block);
3900 if (err || !block)
4969c06a 3901 goto bad_bmap;
30460e1e 3902 first_block = block;
4969c06a
JK		 3903
3904 /*
3905 * It must be PAGE_SIZE aligned on-disk
3906 */
3907 if (first_block & (blocks_per_page - 1)) {
3908 probe_block++;
3909 goto reprobe;
3910 }
3911
3912 for (block_in_page = 1; block_in_page < blocks_per_page;
3913 block_in_page++) {
4969c06a 3914
30460e1e
CM		 3915 block = probe_block + block_in_page;
3916 err = bmap(inode, &block);
3917
3918 if (err || !block)
4969c06a 3919 goto bad_bmap;
30460e1e 3920
4969c06a
JK		 3921 if (block != first_block + block_in_page) {
3922 /* Discontiguity */
3923 probe_block++;
3924 goto reprobe;
3925 }
3926 }
3927
43b9d4b4 3928 first_block >>= (PAGE_SHIFT - inode->i_blkbits);
4969c06a
JK		 3929 if (page_no) { /* exclude the header page */
3930 if (first_block < lowest_block)
3931 lowest_block = first_block;
3932 if (first_block > highest_block)
3933 highest_block = first_block;
3934 }
3935
3e5e479a
CY		 3936 /*
3937 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3938 */
3939 ret = add_swap_extent(sis, page_no, 1, first_block);
3940 if (ret < 0)
3941 goto out;
3942 nr_extents += ret;
4969c06a
JK		 3943 page_no++;
3944 probe_block += blocks_per_page;
3945reprobe:
3946 continue;
3947 }
3e5e479a
CY		 3948 ret = nr_extents;
3949 *span = 1 + highest_block - lowest_block;
3950 if (page_no == 0)
3951 page_no = 1; /* force Empty message */
3952 sis->max = page_no;
3953 sis->pages = page_no - 1;
3954 sis->highest_bit = page_no - 1;
3955out:
3956 return ret;
4969c06a
JK		 3957bad_bmap:
3958 pr_err("swapon: swapfile has holes\n");
3959 return -EINVAL;
3960}
3961
3962static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3963 sector_t *span)
3964{
3965 struct inode *inode = file_inode(file);
3966 int ret;
3967
3968 if (!S_ISREG(inode->i_mode))
3969 return -EINVAL;
3970
3971 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3972 return -EROFS;
3973
3974 ret = f2fs_convert_inline_inode(inode);
3975 if (ret)
3976 return ret;
3977
78134d03 3978 if (!f2fs_disable_compressed_file(inode))
4c8ff709
CY		 3979 return -EINVAL;
3980
0b979f1b
CY		 3981 f2fs_precache_extents(inode);
3982
3e5e479a
CY		 3983 ret = check_swap_activate(sis, file, span);
3984 if (ret < 0)
4969c06a
JK		 3985 return ret;
3986
3987 set_inode_flag(inode, FI_PIN_FILE);
4969c06a 3988 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3e5e479a 3989 return ret;
4969c06a
JK		 3990}
3991
3992static void f2fs_swap_deactivate(struct file *file)
3993{
3994 struct inode *inode = file_inode(file);
3995
3996 clear_inode_flag(inode, FI_PIN_FILE);
3997}
3998#else
3999static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
4000 sector_t *span)
4001{
4002 return -EOPNOTSUPP;
4003}
4004
4005static void f2fs_swap_deactivate(struct file *file)
4006{
4007}
4008#endif
4009
eb47b800
JK		 4010const struct address_space_operations f2fs_dblock_aops = {
4011 .readpage = f2fs_read_data_page,
23323196 4012 .readahead = f2fs_readahead,
eb47b800
JK		 4013 .writepage = f2fs_write_data_page,
4014 .writepages = f2fs_write_data_pages,
4015 .write_begin = f2fs_write_begin,
a1dd3c13 4016 .write_end = f2fs_write_end,
eb47b800 4017 .set_page_dirty = f2fs_set_data_page_dirty,
487261f3
CY		 4018 .invalidatepage = f2fs_invalidate_page,
4019 .releasepage = f2fs_release_page,
eb47b800 4020 .direct_IO = f2fs_direct_IO,
c01e54b7 4021 .bmap = f2fs_bmap,
4969c06a
JK		 4022 .swap_activate = f2fs_swap_activate,
4023 .swap_deactivate = f2fs_swap_deactivate,
5b7a487c
WG		 4024#ifdef CONFIG_MIGRATION
4025 .migratepage = f2fs_migrate_page,
4026#endif
eb47b800 4027};
6dbb1796 4028
5ec2d99d 4029void f2fs_clear_page_cache_dirty_tag(struct page *page)
aec2f729
CY		 4030{
4031 struct address_space *mapping = page_mapping(page);
4032 unsigned long flags;
4033
4034 xa_lock_irqsave(&mapping->i_pages, flags);
5ec2d99d 4035 __xa_clear_mark(&mapping->i_pages, page_index(page),
aec2f729
CY		 4036 PAGECACHE_TAG_DIRTY);
4037 xa_unlock_irqrestore(&mapping->i_pages, flags);
4038}
4039
6dbb1796
EB		 4040int __init f2fs_init_post_read_processing(void)
4041{
95ae251f
EB		 4042 bio_post_read_ctx_cache =
4043 kmem_cache_create("f2fs_bio_post_read_ctx",
4044 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
6dbb1796
EB		 4045 if (!bio_post_read_ctx_cache)
4046 goto fail;
4047 bio_post_read_ctx_pool =
4048 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
4049 bio_post_read_ctx_cache);
4050 if (!bio_post_read_ctx_pool)
4051 goto fail_free_cache;
4052 return 0;
4053
4054fail_free_cache:
4055 kmem_cache_destroy(bio_post_read_ctx_cache);
4056fail:
4057 return -ENOMEM;
4058}
4059
0b20fcec 4060void f2fs_destroy_post_read_processing(void)
6dbb1796
EB		 4061{
4062 mempool_destroy(bio_post_read_ctx_pool);
4063 kmem_cache_destroy(bio_post_read_ctx_cache);
4064}
0b20fcec 4065
4c8ff709
CY		 4066int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
4067{
4068 if (!f2fs_sb_has_encrypt(sbi) &&
4069 !f2fs_sb_has_verity(sbi) &&
4070 !f2fs_sb_has_compression(sbi))
4071 return 0;
4072
4073 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
4074 WQ_UNBOUND | WQ_HIGHPRI,
4075 num_online_cpus());
4076 if (!sbi->post_read_wq)
4077 return -ENOMEM;
4078 return 0;
4079}
4080
4081void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
4082{
4083 if (sbi->post_read_wq)
4084 destroy_workqueue(sbi->post_read_wq);
4085}
4086
0b20fcec
CY		 4087int __init f2fs_init_bio_entry_cache(void)
4088{
98510003 4089 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
0b20fcec
CY		 4090 sizeof(struct bio_entry));
4091 if (!bio_entry_slab)
4092 return -ENOMEM;
4093 return 0;
4094}
4095
f543805f 4096void f2fs_destroy_bio_entry_cache(void)
0b20fcec
CY		 4097{
4098 kmem_cache_destroy(bio_entry_slab);
4099}
Linux 6.x block layer and io_uring tree(s)