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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / fs / f2fs / data.c
blobcdf2f626bea7abc896a5379a1fa815b5367f0afc
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * fs/f2fs/data.c
4 *
5 * Copyright (c) 2012 Samsung Electronics Co., Ltd.
6 * http://www.samsung.com/
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>
14 #include <linux/pagevec.h>
15 #include <linux/blkdev.h>
16 #include <linux/bio.h>
17 #include <linux/swap.h>
18 #include <linux/prefetch.h>
19 #include <linux/uio.h>
20 #include <linux/cleancache.h>
21 #include <linux/sched/signal.h>
22
23 #include "f2fs.h"
24 #include "node.h"
25 #include "segment.h"
26 #include "trace.h"
27 #include <trace/events/f2fs.h>
28
29 #define NUM_PREALLOC_POST_READ_CTXS 128
30
31 static struct kmem_cache *bio_post_read_ctx_cache;
32 static struct kmem_cache *bio_entry_slab;
33 static mempool_t *bio_post_read_ctx_pool;
34 static struct bio_set f2fs_bioset;
35
36 #define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
37
38 int __init f2fs_init_bioset(void)
39 {
40 if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
41 0, BIOSET_NEED_BVECS))
42 return -ENOMEM;
43 return 0;
44 }
45
46 void f2fs_destroy_bioset(void)
47 {
48 bioset_exit(&f2fs_bioset);
49 }
50
51 static inline struct bio *__f2fs_bio_alloc(gfp_t gfp_mask,
52 unsigned int nr_iovecs)
53 {
54 return bio_alloc_bioset(gfp_mask, nr_iovecs, &f2fs_bioset);
55 }
56
57 struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi, int npages, bool noio)
58 {
59 if (noio) {
60 /* No failure on bio allocation */
61 return __f2fs_bio_alloc(GFP_NOIO, npages);
62 }
63
64 if (time_to_inject(sbi, FAULT_ALLOC_BIO)) {
65 f2fs_show_injection_info(sbi, FAULT_ALLOC_BIO);
66 return NULL;
67 }
68
69 return __f2fs_bio_alloc(GFP_KERNEL, npages);
70 }
71
72 static bool __is_cp_guaranteed(struct page *page)
73 {
74 struct address_space *mapping = page->mapping;
75 struct inode *inode;
76 struct f2fs_sb_info *sbi;
77
78 if (!mapping)
79 return false;
80
81 if (f2fs_is_compressed_page(page))
82 return false;
83
84 inode = mapping->host;
85 sbi = F2FS_I_SB(inode);
86
87 if (inode->i_ino == F2FS_META_INO(sbi) ||
88 inode->i_ino == F2FS_NODE_INO(sbi) ||
89 S_ISDIR(inode->i_mode) ||
90 (S_ISREG(inode->i_mode) &&
91 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
92 is_cold_data(page))
93 return true;
94 return false;
95 }
96
97 static enum count_type __read_io_type(struct page *page)
98 {
99 struct address_space *mapping = page_file_mapping(page);
100
101 if (mapping) {
102 struct inode *inode = mapping->host;
103 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
104
105 if (inode->i_ino == F2FS_META_INO(sbi))
106 return F2FS_RD_META;
107
108 if (inode->i_ino == F2FS_NODE_INO(sbi))
109 return F2FS_RD_NODE;
110 }
111 return F2FS_RD_DATA;
112 }
113
114 /* postprocessing steps for read bios */
115 enum bio_post_read_step {
116 STEP_DECRYPT,
117 STEP_DECOMPRESS,
118 STEP_VERITY,
119 };
120
121 struct bio_post_read_ctx {
122 struct bio *bio;
123 struct f2fs_sb_info *sbi;
124 struct work_struct work;
125 unsigned int enabled_steps;
126 };
127
128 static void __read_end_io(struct bio *bio, bool compr, bool verity)
129 {
130 struct page *page;
131 struct bio_vec *bv;
132 struct bvec_iter_all iter_all;
133
134 bio_for_each_segment_all(bv, bio, iter_all) {
135 page = bv->bv_page;
136
137 #ifdef CONFIG_F2FS_FS_COMPRESSION
138 if (compr && f2fs_is_compressed_page(page)) {
139 f2fs_decompress_pages(bio, page, verity);
140 continue;
141 }
142 if (verity)
143 continue;
144 #endif
145
146 /* PG_error was set if any post_read step failed */
147 if (bio->bi_status || PageError(page)) {
148 ClearPageUptodate(page);
149 /* will re-read again later */
150 ClearPageError(page);
151 } else {
152 SetPageUptodate(page);
153 }
154 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
155 unlock_page(page);
156 }
157 }
158
159 static void f2fs_release_read_bio(struct bio *bio);
160 static void __f2fs_read_end_io(struct bio *bio, bool compr, bool verity)
161 {
162 if (!compr)
163 __read_end_io(bio, false, verity);
164 f2fs_release_read_bio(bio);
165 }
166
167 static void f2fs_decompress_bio(struct bio *bio, bool verity)
168 {
169 __read_end_io(bio, true, verity);
170 }
171
172 static void bio_post_read_processing(struct bio_post_read_ctx *ctx);
173
174 static void f2fs_decrypt_work(struct bio_post_read_ctx *ctx)
175 {
176 fscrypt_decrypt_bio(ctx->bio);
177 }
178
179 static void f2fs_decompress_work(struct bio_post_read_ctx *ctx)
180 {
181 f2fs_decompress_bio(ctx->bio, ctx->enabled_steps & (1 << STEP_VERITY));
182 }
183
184 #ifdef CONFIG_F2FS_FS_COMPRESSION
185 static void f2fs_verify_pages(struct page **rpages, unsigned int cluster_size)
186 {
187 f2fs_decompress_end_io(rpages, cluster_size, false, true);
188 }
189
190 static void f2fs_verify_bio(struct bio *bio)
191 {
192 struct bio_vec *bv;
193 struct bvec_iter_all iter_all;
194
195 bio_for_each_segment_all(bv, bio, iter_all) {
196 struct page *page = bv->bv_page;
197 struct decompress_io_ctx *dic;
198
199 dic = (struct decompress_io_ctx *)page_private(page);
200
201 if (dic) {
202 if (refcount_dec_not_one(&dic->ref))
203 continue;
204 f2fs_verify_pages(dic->rpages,
205 dic->cluster_size);
206 f2fs_free_dic(dic);
207 continue;
208 }
209
210 if (bio->bi_status || PageError(page))
211 goto clear_uptodate;
212
213 if (fsverity_verify_page(page)) {
214 SetPageUptodate(page);
215 goto unlock;
216 }
217 clear_uptodate:
218 ClearPageUptodate(page);
219 ClearPageError(page);
220 unlock:
221 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
222 unlock_page(page);
223 }
224 }
225 #endif
226
227 static void f2fs_verity_work(struct work_struct *work)
228 {
229 struct bio_post_read_ctx *ctx =
230 container_of(work, struct bio_post_read_ctx, work);
231 struct bio *bio = ctx->bio;
232 #ifdef CONFIG_F2FS_FS_COMPRESSION
233 unsigned int enabled_steps = ctx->enabled_steps;
234 #endif
235
236 /*
237 * fsverity_verify_bio() may call readpages() again, and while verity
238 * will be disabled for this, decryption may still be needed, resulting
239 * in another bio_post_read_ctx being allocated. So to prevent
240 * deadlocks we need to release the current ctx to the mempool first.
241 * This assumes that verity is the last post-read step.
242 */
243 mempool_free(ctx, bio_post_read_ctx_pool);
244 bio->bi_private = NULL;
245
246 #ifdef CONFIG_F2FS_FS_COMPRESSION
247 /* previous step is decompression */
248 if (enabled_steps & (1 << STEP_DECOMPRESS)) {
249 f2fs_verify_bio(bio);
250 f2fs_release_read_bio(bio);
251 return;
252 }
253 #endif
254
255 fsverity_verify_bio(bio);
256 __f2fs_read_end_io(bio, false, false);
257 }
258
259 static void f2fs_post_read_work(struct work_struct *work)
260 {
261 struct bio_post_read_ctx *ctx =
262 container_of(work, struct bio_post_read_ctx, work);
263
264 if (ctx->enabled_steps & (1 << STEP_DECRYPT))
265 f2fs_decrypt_work(ctx);
266
267 if (ctx->enabled_steps & (1 << STEP_DECOMPRESS))
268 f2fs_decompress_work(ctx);
269
270 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
271 INIT_WORK(&ctx->work, f2fs_verity_work);
272 fsverity_enqueue_verify_work(&ctx->work);
273 return;
274 }
275
276 __f2fs_read_end_io(ctx->bio,
277 ctx->enabled_steps & (1 << STEP_DECOMPRESS), false);
278 }
279
280 static void f2fs_enqueue_post_read_work(struct f2fs_sb_info *sbi,
281 struct work_struct *work)
282 {
283 queue_work(sbi->post_read_wq, work);
284 }
285
286 static void bio_post_read_processing(struct bio_post_read_ctx *ctx)
287 {
288 /*
289 * We use different work queues for decryption and for verity because
290 * verity may require reading metadata pages that need decryption, and
291 * we shouldn't recurse to the same workqueue.
292 */
293
294 if (ctx->enabled_steps & (1 << STEP_DECRYPT) ||
295 ctx->enabled_steps & (1 << STEP_DECOMPRESS)) {
296 INIT_WORK(&ctx->work, f2fs_post_read_work);
297 f2fs_enqueue_post_read_work(ctx->sbi, &ctx->work);
298 return;
299 }
300
301 if (ctx->enabled_steps & (1 << STEP_VERITY)) {
302 INIT_WORK(&ctx->work, f2fs_verity_work);
303 fsverity_enqueue_verify_work(&ctx->work);
304 return;
305 }
306
307 __f2fs_read_end_io(ctx->bio, false, false);
308 }
309
310 static bool f2fs_bio_post_read_required(struct bio *bio)
311 {
312 return bio->bi_private;
313 }
314
315 static void f2fs_read_end_io(struct bio *bio)
316 {
317 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
318
319 if (time_to_inject(sbi, FAULT_READ_IO)) {
320 f2fs_show_injection_info(sbi, FAULT_READ_IO);
321 bio->bi_status = BLK_STS_IOERR;
322 }
323
324 if (f2fs_bio_post_read_required(bio)) {
325 struct bio_post_read_ctx *ctx = bio->bi_private;
326
327 bio_post_read_processing(ctx);
328 return;
329 }
330
331 __f2fs_read_end_io(bio, false, false);
332 }
333
334 static void f2fs_write_end_io(struct bio *bio)
335 {
336 struct f2fs_sb_info *sbi = bio->bi_private;
337 struct bio_vec *bvec;
338 struct bvec_iter_all iter_all;
339
340 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
341 f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
342 bio->bi_status = BLK_STS_IOERR;
343 }
344
345 bio_for_each_segment_all(bvec, bio, iter_all) {
346 struct page *page = bvec->bv_page;
347 enum count_type type = WB_DATA_TYPE(page);
348
349 if (IS_DUMMY_WRITTEN_PAGE(page)) {
350 set_page_private(page, (unsigned long)NULL);
351 ClearPagePrivate(page);
352 unlock_page(page);
353 mempool_free(page, sbi->write_io_dummy);
354
355 if (unlikely(bio->bi_status))
356 f2fs_stop_checkpoint(sbi, true);
357 continue;
358 }
359
360 fscrypt_finalize_bounce_page(&page);
361
362 #ifdef CONFIG_F2FS_FS_COMPRESSION
363 if (f2fs_is_compressed_page(page)) {
364 f2fs_compress_write_end_io(bio, page);
365 continue;
366 }
367 #endif
368
369 if (unlikely(bio->bi_status)) {
370 mapping_set_error(page->mapping, -EIO);
371 if (type == F2FS_WB_CP_DATA)
372 f2fs_stop_checkpoint(sbi, true);
373 }
374
375 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
376 page->index != nid_of_node(page));
377
378 dec_page_count(sbi, type);
379 if (f2fs_in_warm_node_list(sbi, page))
380 f2fs_del_fsync_node_entry(sbi, page);
381 clear_cold_data(page);
382 end_page_writeback(page);
383 }
384 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
385 wq_has_sleeper(&sbi->cp_wait))
386 wake_up(&sbi->cp_wait);
387
388 bio_put(bio);
389 }
390
391 struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
392 block_t blk_addr, struct bio *bio)
393 {
394 struct block_device *bdev = sbi->sb->s_bdev;
395 int i;
396
397 if (f2fs_is_multi_device(sbi)) {
398 for (i = 0; i < sbi->s_ndevs; i++) {
399 if (FDEV(i).start_blk <= blk_addr &&
400 FDEV(i).end_blk >= blk_addr) {
401 blk_addr -= FDEV(i).start_blk;
402 bdev = FDEV(i).bdev;
403 break;
404 }
405 }
406 }
407 if (bio) {
408 bio_set_dev(bio, bdev);
409 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
410 }
411 return bdev;
412 }
413
414 int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
415 {
416 int i;
417
418 if (!f2fs_is_multi_device(sbi))
419 return 0;
420
421 for (i = 0; i < sbi->s_ndevs; i++)
422 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
423 return i;
424 return 0;
425 }
426
427 /*
428 * Return true, if pre_bio's bdev is same as its target device.
429 */
430 static bool __same_bdev(struct f2fs_sb_info *sbi,
431 block_t blk_addr, struct bio *bio)
432 {
433 struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL);
434 return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno;
435 }
436
437 static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
438 {
439 struct f2fs_sb_info *sbi = fio->sbi;
440 struct bio *bio;
441
442 bio = f2fs_bio_alloc(sbi, npages, true);
443
444 f2fs_target_device(sbi, fio->new_blkaddr, bio);
445 if (is_read_io(fio->op)) {
446 bio->bi_end_io = f2fs_read_end_io;
447 bio->bi_private = NULL;
448 } else {
449 bio->bi_end_io = f2fs_write_end_io;
450 bio->bi_private = sbi;
451 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
452 fio->type, fio->temp);
453 }
454 if (fio->io_wbc)
455 wbc_init_bio(fio->io_wbc, bio);
456
457 return bio;
458 }
459
460 static inline void __submit_bio(struct f2fs_sb_info *sbi,
461 struct bio *bio, enum page_type type)
462 {
463 if (!is_read_io(bio_op(bio))) {
464 unsigned int start;
465
466 if (type != DATA && type != NODE)
467 goto submit_io;
468
469 if (f2fs_lfs_mode(sbi) && current->plug)
470 blk_finish_plug(current->plug);
471
472 if (F2FS_IO_ALIGNED(sbi))
473 goto submit_io;
474
475 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
476 start %= F2FS_IO_SIZE(sbi);
477
478 if (start == 0)
479 goto submit_io;
480
481 /* fill dummy pages */
482 for (; start < F2FS_IO_SIZE(sbi); start++) {
483 struct page *page =
484 mempool_alloc(sbi->write_io_dummy,
485 GFP_NOIO | __GFP_NOFAIL);
486 f2fs_bug_on(sbi, !page);
487
488 zero_user_segment(page, 0, PAGE_SIZE);
489 SetPagePrivate(page);
490 set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
491 lock_page(page);
492 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
493 f2fs_bug_on(sbi, 1);
494 }
495 /*
496 * In the NODE case, we lose next block address chain. So, we
497 * need to do checkpoint in f2fs_sync_file.
498 */
499 if (type == NODE)
500 set_sbi_flag(sbi, SBI_NEED_CP);
501 }
502 submit_io:
503 if (is_read_io(bio_op(bio)))
504 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
505 else
506 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
507 submit_bio(bio);
508 }
509
510 void f2fs_submit_bio(struct f2fs_sb_info *sbi,
511 struct bio *bio, enum page_type type)
512 {
513 __submit_bio(sbi, bio, type);
514 }
515
516 static void __submit_merged_bio(struct f2fs_bio_info *io)
517 {
518 struct f2fs_io_info *fio = &io->fio;
519
520 if (!io->bio)
521 return;
522
523 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
524
525 if (is_read_io(fio->op))
526 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
527 else
528 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
529
530 __submit_bio(io->sbi, io->bio, fio->type);
531 io->bio = NULL;
532 }
533
534 static bool __has_merged_page(struct bio *bio, struct inode *inode,
535 struct page *page, nid_t ino)
536 {
537 struct bio_vec *bvec;
538 struct bvec_iter_all iter_all;
539
540 if (!bio)
541 return false;
542
543 if (!inode && !page && !ino)
544 return true;
545
546 bio_for_each_segment_all(bvec, bio, iter_all) {
547 struct page *target = bvec->bv_page;
548
549 if (fscrypt_is_bounce_page(target)) {
550 target = fscrypt_pagecache_page(target);
551 if (IS_ERR(target))
552 continue;
553 }
554 if (f2fs_is_compressed_page(target)) {
555 target = f2fs_compress_control_page(target);
556 if (IS_ERR(target))
557 continue;
558 }
559
560 if (inode && inode == target->mapping->host)
561 return true;
562 if (page && page == target)
563 return true;
564 if (ino && ino == ino_of_node(target))
565 return true;
566 }
567
568 return false;
569 }
570
571 static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
572 enum page_type type, enum temp_type temp)
573 {
574 enum page_type btype = PAGE_TYPE_OF_BIO(type);
575 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
576
577 down_write(&io->io_rwsem);
578
579 /* change META to META_FLUSH in the checkpoint procedure */
580 if (type >= META_FLUSH) {
581 io->fio.type = META_FLUSH;
582 io->fio.op = REQ_OP_WRITE;
583 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
584 if (!test_opt(sbi, NOBARRIER))
585 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
586 }
587 __submit_merged_bio(io);
588 up_write(&io->io_rwsem);
589 }
590
591 static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
592 struct inode *inode, struct page *page,
593 nid_t ino, enum page_type type, bool force)
594 {
595 enum temp_type temp;
596 bool ret = true;
597
598 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
599 if (!force) {
600 enum page_type btype = PAGE_TYPE_OF_BIO(type);
601 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
602
603 down_read(&io->io_rwsem);
604 ret = __has_merged_page(io->bio, inode, page, ino);
605 up_read(&io->io_rwsem);
606 }
607 if (ret)
608 __f2fs_submit_merged_write(sbi, type, temp);
609
610 /* TODO: use HOT temp only for meta pages now. */
611 if (type >= META)
612 break;
613 }
614 }
615
616 void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
617 {
618 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
619 }
620
621 void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
622 struct inode *inode, struct page *page,
623 nid_t ino, enum page_type type)
624 {
625 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
626 }
627
628 void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
629 {
630 f2fs_submit_merged_write(sbi, DATA);
631 f2fs_submit_merged_write(sbi, NODE);
632 f2fs_submit_merged_write(sbi, META);
633 }
634
635 /*
636 * Fill the locked page with data located in the block address.
637 * A caller needs to unlock the page on failure.
638 */
639 int f2fs_submit_page_bio(struct f2fs_io_info *fio)
640 {
641 struct bio *bio;
642 struct page *page = fio->encrypted_page ?
643 fio->encrypted_page : fio->page;
644
645 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
646 fio->is_por ? META_POR : (__is_meta_io(fio) ?
647 META_GENERIC : DATA_GENERIC_ENHANCE)))
648 return -EFSCORRUPTED;
649
650 trace_f2fs_submit_page_bio(page, fio);
651 f2fs_trace_ios(fio, 0);
652
653 /* Allocate a new bio */
654 bio = __bio_alloc(fio, 1);
655
656 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
657 bio_put(bio);
658 return -EFAULT;
659 }
660
661 if (fio->io_wbc && !is_read_io(fio->op))
662 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
663
664 bio_set_op_attrs(bio, fio->op, fio->op_flags);
665
666 inc_page_count(fio->sbi, is_read_io(fio->op) ?
667 __read_io_type(page): WB_DATA_TYPE(fio->page));
668
669 __submit_bio(fio->sbi, bio, fio->type);
670 return 0;
671 }
672
673 static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
674 block_t last_blkaddr, block_t cur_blkaddr)
675 {
676 if (last_blkaddr + 1 != cur_blkaddr)
677 return false;
678 return __same_bdev(sbi, cur_blkaddr, bio);
679 }
680
681 static bool io_type_is_mergeable(struct f2fs_bio_info *io,
682 struct f2fs_io_info *fio)
683 {
684 if (io->fio.op != fio->op)
685 return false;
686 return io->fio.op_flags == fio->op_flags;
687 }
688
689 static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
690 struct f2fs_bio_info *io,
691 struct f2fs_io_info *fio,
692 block_t last_blkaddr,
693 block_t cur_blkaddr)
694 {
695 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
696 unsigned int filled_blocks =
697 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
698 unsigned int io_size = F2FS_IO_SIZE(sbi);
699 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
700
701 /* IOs in bio is aligned and left space of vectors is not enough */
702 if (!(filled_blocks % io_size) && left_vecs < io_size)
703 return false;
704 }
705 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
706 return false;
707 return io_type_is_mergeable(io, fio);
708 }
709
710 static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
711 struct page *page, enum temp_type temp)
712 {
713 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
714 struct bio_entry *be;
715
716 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS);
717 be->bio = bio;
718 bio_get(bio);
719
720 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
721 f2fs_bug_on(sbi, 1);
722
723 down_write(&io->bio_list_lock);
724 list_add_tail(&be->list, &io->bio_list);
725 up_write(&io->bio_list_lock);
726 }
727
728 static void del_bio_entry(struct bio_entry *be)
729 {
730 list_del(&be->list);
731 kmem_cache_free(bio_entry_slab, be);
732 }
733
734 static int add_ipu_page(struct f2fs_sb_info *sbi, struct bio **bio,
735 struct page *page)
736 {
737 enum temp_type temp;
738 bool found = false;
739 int ret = -EAGAIN;
740
741 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
742 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
743 struct list_head *head = &io->bio_list;
744 struct bio_entry *be;
745
746 down_write(&io->bio_list_lock);
747 list_for_each_entry(be, head, list) {
748 if (be->bio != *bio)
749 continue;
750
751 found = true;
752
753 if (bio_add_page(*bio, page, PAGE_SIZE, 0) ==
754 PAGE_SIZE) {
755 ret = 0;
756 break;
757 }
758
759 /* bio is full */
760 del_bio_entry(be);
761 __submit_bio(sbi, *bio, DATA);
762 break;
763 }
764 up_write(&io->bio_list_lock);
765 }
766
767 if (ret) {
768 bio_put(*bio);
769 *bio = NULL;
770 }
771
772 return ret;
773 }
774
775 void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
776 struct bio **bio, struct page *page)
777 {
778 enum temp_type temp;
779 bool found = false;
780 struct bio *target = bio ? *bio : NULL;
781
782 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
783 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
784 struct list_head *head = &io->bio_list;
785 struct bio_entry *be;
786
787 if (list_empty(head))
788 continue;
789
790 down_read(&io->bio_list_lock);
791 list_for_each_entry(be, head, list) {
792 if (target)
793 found = (target == be->bio);
794 else
795 found = __has_merged_page(be->bio, NULL,
796 page, 0);
797 if (found)
798 break;
799 }
800 up_read(&io->bio_list_lock);
801
802 if (!found)
803 continue;
804
805 found = false;
806
807 down_write(&io->bio_list_lock);
808 list_for_each_entry(be, head, list) {
809 if (target)
810 found = (target == be->bio);
811 else
812 found = __has_merged_page(be->bio, NULL,
813 page, 0);
814 if (found) {
815 target = be->bio;
816 del_bio_entry(be);
817 break;
818 }
819 }
820 up_write(&io->bio_list_lock);
821 }
822
823 if (found)
824 __submit_bio(sbi, target, DATA);
825 if (bio && *bio) {
826 bio_put(*bio);
827 *bio = NULL;
828 }
829 }
830
831 int f2fs_merge_page_bio(struct f2fs_io_info *fio)
832 {
833 struct bio *bio = *fio->bio;
834 struct page *page = fio->encrypted_page ?
835 fio->encrypted_page : fio->page;
836
837 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
838 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
839 return -EFSCORRUPTED;
840
841 trace_f2fs_submit_page_bio(page, fio);
842 f2fs_trace_ios(fio, 0);
843
844 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
845 fio->new_blkaddr))
846 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
847 alloc_new:
848 if (!bio) {
849 bio = __bio_alloc(fio, BIO_MAX_PAGES);
850 bio_set_op_attrs(bio, fio->op, fio->op_flags);
851
852 add_bio_entry(fio->sbi, bio, page, fio->temp);
853 } else {
854 if (add_ipu_page(fio->sbi, &bio, page))
855 goto alloc_new;
856 }
857
858 if (fio->io_wbc)
859 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
860
861 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
862
863 *fio->last_block = fio->new_blkaddr;
864 *fio->bio = bio;
865
866 return 0;
867 }
868
869 void f2fs_submit_page_write(struct f2fs_io_info *fio)
870 {
871 struct f2fs_sb_info *sbi = fio->sbi;
872 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
873 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
874 struct page *bio_page;
875
876 f2fs_bug_on(sbi, is_read_io(fio->op));
877
878 down_write(&io->io_rwsem);
879 next:
880 if (fio->in_list) {
881 spin_lock(&io->io_lock);
882 if (list_empty(&io->io_list)) {
883 spin_unlock(&io->io_lock);
884 goto out;
885 }
886 fio = list_first_entry(&io->io_list,
887 struct f2fs_io_info, list);
888 list_del(&fio->list);
889 spin_unlock(&io->io_lock);
890 }
891
892 verify_fio_blkaddr(fio);
893
894 if (fio->encrypted_page)
895 bio_page = fio->encrypted_page;
896 else if (fio->compressed_page)
897 bio_page = fio->compressed_page;
898 else
899 bio_page = fio->page;
900
901 /* set submitted = true as a return value */
902 fio->submitted = true;
903
904 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
905
906 if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio,
907 io->last_block_in_bio, fio->new_blkaddr))
908 __submit_merged_bio(io);
909 alloc_new:
910 if (io->bio == NULL) {
911 if (F2FS_IO_ALIGNED(sbi) &&
912 (fio->type == DATA || fio->type == NODE) &&
913 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
914 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
915 fio->retry = true;
916 goto skip;
917 }
918 io->bio = __bio_alloc(fio, BIO_MAX_PAGES);
919 io->fio = *fio;
920 }
921
922 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
923 __submit_merged_bio(io);
924 goto alloc_new;
925 }
926
927 if (fio->io_wbc)
928 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
929
930 io->last_block_in_bio = fio->new_blkaddr;
931 f2fs_trace_ios(fio, 0);
932
933 trace_f2fs_submit_page_write(fio->page, fio);
934 skip:
935 if (fio->in_list)
936 goto next;
937 out:
938 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
939 !f2fs_is_checkpoint_ready(sbi))
940 __submit_merged_bio(io);
941 up_write(&io->io_rwsem);
942 }
943
944 static inline bool f2fs_need_verity(const struct inode *inode, pgoff_t idx)
945 {
946 return fsverity_active(inode) &&
947 idx < DIV_ROUND_UP(inode->i_size, PAGE_SIZE);
948 }
949
950 static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
951 unsigned nr_pages, unsigned op_flag,
952 pgoff_t first_idx, bool for_write)
953 {
954 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
955 struct bio *bio;
956 struct bio_post_read_ctx *ctx;
957 unsigned int post_read_steps = 0;
958
959 bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES),
960 for_write);
961 if (!bio)
962 return ERR_PTR(-ENOMEM);
963 f2fs_target_device(sbi, blkaddr, bio);
964 bio->bi_end_io = f2fs_read_end_io;
965 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
966
967 if (f2fs_encrypted_file(inode))
968 post_read_steps |= 1 << STEP_DECRYPT;
969 if (f2fs_compressed_file(inode))
970 post_read_steps |= 1 << STEP_DECOMPRESS;
971 if (f2fs_need_verity(inode, first_idx))
972 post_read_steps |= 1 << STEP_VERITY;
973
974 if (post_read_steps) {
975 /* Due to the mempool, this never fails. */
976 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
977 ctx->bio = bio;
978 ctx->sbi = sbi;
979 ctx->enabled_steps = post_read_steps;
980 bio->bi_private = ctx;
981 }
982
983 return bio;
984 }
985
986 static void f2fs_release_read_bio(struct bio *bio)
987 {
988 if (bio->bi_private)
989 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
990 bio_put(bio);
991 }
992
993 /* This can handle encryption stuffs */
994 static int f2fs_submit_page_read(struct inode *inode, struct page *page,
995 block_t blkaddr, bool for_write)
996 {
997 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
998 struct bio *bio;
999
1000 bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0, page->index, for_write);
1001 if (IS_ERR(bio))
1002 return PTR_ERR(bio);
1003
1004 /* wait for GCed page writeback via META_MAPPING */
1005 f2fs_wait_on_block_writeback(inode, blkaddr);
1006
1007 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1008 bio_put(bio);
1009 return -EFAULT;
1010 }
1011 ClearPageError(page);
1012 inc_page_count(sbi, F2FS_RD_DATA);
1013 __submit_bio(sbi, bio, DATA);
1014 return 0;
1015 }
1016
1017 static void __set_data_blkaddr(struct dnode_of_data *dn)
1018 {
1019 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
1020 __le32 *addr_array;
1021 int base = 0;
1022
1023 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
1024 base = get_extra_isize(dn->inode);
1025
1026 /* Get physical address of data block */
1027 addr_array = blkaddr_in_node(rn);
1028 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
1029 }
1030
1031 /*
1032 * Lock ordering for the change of data block address:
1033 * ->data_page
1034 * ->node_page
1035 * update block addresses in the node page
1036 */
1037 void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
1038 {
1039 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
1040 __set_data_blkaddr(dn);
1041 if (set_page_dirty(dn->node_page))
1042 dn->node_changed = true;
1043 }
1044
1045 void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
1046 {
1047 dn->data_blkaddr = blkaddr;
1048 f2fs_set_data_blkaddr(dn);
1049 f2fs_update_extent_cache(dn);
1050 }
1051
1052 /* dn->ofs_in_node will be returned with up-to-date last block pointer */
1053 int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
1054 {
1055 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1056 int err;
1057
1058 if (!count)
1059 return 0;
1060
1061 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
1062 return -EPERM;
1063 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1064 return err;
1065
1066 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
1067 dn->ofs_in_node, count);
1068
1069 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
1070
1071 for (; count > 0; dn->ofs_in_node++) {
1072 block_t blkaddr = f2fs_data_blkaddr(dn);
1073 if (blkaddr == NULL_ADDR) {
1074 dn->data_blkaddr = NEW_ADDR;
1075 __set_data_blkaddr(dn);
1076 count--;
1077 }
1078 }
1079
1080 if (set_page_dirty(dn->node_page))
1081 dn->node_changed = true;
1082 return 0;
1083 }
1084
1085 /* Should keep dn->ofs_in_node unchanged */
1086 int f2fs_reserve_new_block(struct dnode_of_data *dn)
1087 {
1088 unsigned int ofs_in_node = dn->ofs_in_node;
1089 int ret;
1090
1091 ret = f2fs_reserve_new_blocks(dn, 1);
1092 dn->ofs_in_node = ofs_in_node;
1093 return ret;
1094 }
1095
1096 int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
1097 {
1098 bool need_put = dn->inode_page ? false : true;
1099 int err;
1100
1101 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
1102 if (err)
1103 return err;
1104
1105 if (dn->data_blkaddr == NULL_ADDR)
1106 err = f2fs_reserve_new_block(dn);
1107 if (err || need_put)
1108 f2fs_put_dnode(dn);
1109 return err;
1110 }
1111
1112 int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
1113 {
1114 struct extent_info ei = {0,0,0};
1115 struct inode *inode = dn->inode;
1116
1117 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1118 dn->data_blkaddr = ei.blk + index - ei.fofs;
1119 return 0;
1120 }
1121
1122 return f2fs_reserve_block(dn, index);
1123 }
1124
1125 struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
1126 int op_flags, bool for_write)
1127 {
1128 struct address_space *mapping = inode->i_mapping;
1129 struct dnode_of_data dn;
1130 struct page *page;
1131 struct extent_info ei = {0,0,0};
1132 int err;
1133
1134 page = f2fs_grab_cache_page(mapping, index, for_write);
1135 if (!page)
1136 return ERR_PTR(-ENOMEM);
1137
1138 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1139 dn.data_blkaddr = ei.blk + index - ei.fofs;
1140 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1141 DATA_GENERIC_ENHANCE_READ)) {
1142 err = -EFSCORRUPTED;
1143 goto put_err;
1144 }
1145 goto got_it;
1146 }
1147
1148 set_new_dnode(&dn, inode, NULL, NULL, 0);
1149 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
1150 if (err)
1151 goto put_err;
1152 f2fs_put_dnode(&dn);
1153
1154 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
1155 err = -ENOENT;
1156 goto put_err;
1157 }
1158 if (dn.data_blkaddr != NEW_ADDR &&
1159 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1160 dn.data_blkaddr,
1161 DATA_GENERIC_ENHANCE)) {
1162 err = -EFSCORRUPTED;
1163 goto put_err;
1164 }
1165 got_it:
1166 if (PageUptodate(page)) {
1167 unlock_page(page);
1168 return page;
1169 }
1170
1171 /*
1172 * A new dentry page is allocated but not able to be written, since its
1173 * new inode page couldn't be allocated due to -ENOSPC.
1174 * In such the case, its blkaddr can be remained as NEW_ADDR.
1175 * see, f2fs_add_link -> f2fs_get_new_data_page ->
1176 * f2fs_init_inode_metadata.
1177 */
1178 if (dn.data_blkaddr == NEW_ADDR) {
1179 zero_user_segment(page, 0, PAGE_SIZE);
1180 if (!PageUptodate(page))
1181 SetPageUptodate(page);
1182 unlock_page(page);
1183 return page;
1184 }
1185
1186 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr, for_write);
1187 if (err)
1188 goto put_err;
1189 return page;
1190
1191 put_err:
1192 f2fs_put_page(page, 1);
1193 return ERR_PTR(err);
1194 }
1195
1196 struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
1197 {
1198 struct address_space *mapping = inode->i_mapping;
1199 struct page *page;
1200
1201 page = find_get_page(mapping, index);
1202 if (page && PageUptodate(page))
1203 return page;
1204 f2fs_put_page(page, 0);
1205
1206 page = f2fs_get_read_data_page(inode, index, 0, false);
1207 if (IS_ERR(page))
1208 return page;
1209
1210 if (PageUptodate(page))
1211 return page;
1212
1213 wait_on_page_locked(page);
1214 if (unlikely(!PageUptodate(page))) {
1215 f2fs_put_page(page, 0);
1216 return ERR_PTR(-EIO);
1217 }
1218 return page;
1219 }
1220
1221 /*
1222 * If it tries to access a hole, return an error.
1223 * Because, the callers, functions in dir.c and GC, should be able to know
1224 * whether this page exists or not.
1225 */
1226 struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
1227 bool for_write)
1228 {
1229 struct address_space *mapping = inode->i_mapping;
1230 struct page *page;
1231 repeat:
1232 page = f2fs_get_read_data_page(inode, index, 0, for_write);
1233 if (IS_ERR(page))
1234 return page;
1235
1236 /* wait for read completion */
1237 lock_page(page);
1238 if (unlikely(page->mapping != mapping)) {
1239 f2fs_put_page(page, 1);
1240 goto repeat;
1241 }
1242 if (unlikely(!PageUptodate(page))) {
1243 f2fs_put_page(page, 1);
1244 return ERR_PTR(-EIO);
1245 }
1246 return page;
1247 }
1248
1249 /*
1250 * Caller ensures that this data page is never allocated.
1251 * A new zero-filled data page is allocated in the page cache.
1252 *
1253 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
1254 * f2fs_unlock_op().
1255 * Note that, ipage is set only by make_empty_dir, and if any error occur,
1256 * ipage should be released by this function.
1257 */
1258 struct page *f2fs_get_new_data_page(struct inode *inode,
1259 struct page *ipage, pgoff_t index, bool new_i_size)
1260 {
1261 struct address_space *mapping = inode->i_mapping;
1262 struct page *page;
1263 struct dnode_of_data dn;
1264 int err;
1265
1266 page = f2fs_grab_cache_page(mapping, index, true);
1267 if (!page) {
1268 /*
1269 * before exiting, we should make sure ipage will be released
1270 * if any error occur.
1271 */
1272 f2fs_put_page(ipage, 1);
1273 return ERR_PTR(-ENOMEM);
1274 }
1275
1276 set_new_dnode(&dn, inode, ipage, NULL, 0);
1277 err = f2fs_reserve_block(&dn, index);
1278 if (err) {
1279 f2fs_put_page(page, 1);
1280 return ERR_PTR(err);
1281 }
1282 if (!ipage)
1283 f2fs_put_dnode(&dn);
1284
1285 if (PageUptodate(page))
1286 goto got_it;
1287
1288 if (dn.data_blkaddr == NEW_ADDR) {
1289 zero_user_segment(page, 0, PAGE_SIZE);
1290 if (!PageUptodate(page))
1291 SetPageUptodate(page);
1292 } else {
1293 f2fs_put_page(page, 1);
1294
1295 /* if ipage exists, blkaddr should be NEW_ADDR */
1296 f2fs_bug_on(F2FS_I_SB(inode), ipage);
1297 page = f2fs_get_lock_data_page(inode, index, true);
1298 if (IS_ERR(page))
1299 return page;
1300 }
1301 got_it:
1302 if (new_i_size && i_size_read(inode) <
1303 ((loff_t)(index + 1) << PAGE_SHIFT))
1304 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
1305 return page;
1306 }
1307
1308 static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
1309 {
1310 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1311 struct f2fs_summary sum;
1312 struct node_info ni;
1313 block_t old_blkaddr;
1314 blkcnt_t count = 1;
1315 int err;
1316
1317 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
1318 return -EPERM;
1319
1320 err = f2fs_get_node_info(sbi, dn->nid, &ni);
1321 if (err)
1322 return err;
1323
1324 dn->data_blkaddr = f2fs_data_blkaddr(dn);
1325 if (dn->data_blkaddr != NULL_ADDR)
1326 goto alloc;
1327
1328 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1329 return err;
1330
1331 alloc:
1332 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
1333 old_blkaddr = dn->data_blkaddr;
1334 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
1335 &sum, seg_type, NULL, false);
1336 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO)
1337 invalidate_mapping_pages(META_MAPPING(sbi),
1338 old_blkaddr, old_blkaddr);
1339 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
1340
1341 /*
1342 * i_size will be updated by direct_IO. Otherwise, we'll get stale
1343 * data from unwritten block via dio_read.
1344 */
1345 return 0;
1346 }
1347
1348 int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from)
1349 {
1350 struct inode *inode = file_inode(iocb->ki_filp);
1351 struct f2fs_map_blocks map;
1352 int flag;
1353 int err = 0;
1354 bool direct_io = iocb->ki_flags & IOCB_DIRECT;
1355
1356 map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos);
1357 map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from));
1358 if (map.m_len > map.m_lblk)
1359 map.m_len -= map.m_lblk;
1360 else
1361 map.m_len = 0;
1362
1363 map.m_next_pgofs = NULL;
1364 map.m_next_extent = NULL;
1365 map.m_seg_type = NO_CHECK_TYPE;
1366 map.m_may_create = true;
1367
1368 if (direct_io) {
1369 map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint);
1370 flag = f2fs_force_buffered_io(inode, iocb, from) ?
1371 F2FS_GET_BLOCK_PRE_AIO :
1372 F2FS_GET_BLOCK_PRE_DIO;
1373 goto map_blocks;
1374 }
1375 if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) {
1376 err = f2fs_convert_inline_inode(inode);
1377 if (err)
1378 return err;
1379 }
1380 if (f2fs_has_inline_data(inode))
1381 return err;
1382
1383 flag = F2FS_GET_BLOCK_PRE_AIO;
1384
1385 map_blocks:
1386 err = f2fs_map_blocks(inode, &map, 1, flag);
1387 if (map.m_len > 0 && err == -ENOSPC) {
1388 if (!direct_io)
1389 set_inode_flag(inode, FI_NO_PREALLOC);
1390 err = 0;
1391 }
1392 return err;
1393 }
1394
1395 void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
1396 {
1397 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1398 if (lock)
1399 down_read(&sbi->node_change);
1400 else
1401 up_read(&sbi->node_change);
1402 } else {
1403 if (lock)
1404 f2fs_lock_op(sbi);
1405 else
1406 f2fs_unlock_op(sbi);
1407 }
1408 }
1409
1410 /*
1411 * f2fs_map_blocks() tries to find or build mapping relationship which
1412 * maps continuous logical blocks to physical blocks, and return such
1413 * info via f2fs_map_blocks structure.
1414 */
1415 int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
1416 int create, int flag)
1417 {
1418 unsigned int maxblocks = map->m_len;
1419 struct dnode_of_data dn;
1420 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1421 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
1422 pgoff_t pgofs, end_offset, end;
1423 int err = 0, ofs = 1;
1424 unsigned int ofs_in_node, last_ofs_in_node;
1425 blkcnt_t prealloc;
1426 struct extent_info ei = {0,0,0};
1427 block_t blkaddr;
1428 unsigned int start_pgofs;
1429
1430 if (!maxblocks)
1431 return 0;
1432
1433 map->m_len = 0;
1434 map->m_flags = 0;
1435
1436 /* it only supports block size == page size */
1437 pgofs = (pgoff_t)map->m_lblk;
1438 end = pgofs + maxblocks;
1439
1440 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
1441 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
1442 map->m_may_create)
1443 goto next_dnode;
1444
1445 map->m_pblk = ei.blk + pgofs - ei.fofs;
1446 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1447 map->m_flags = F2FS_MAP_MAPPED;
1448 if (map->m_next_extent)
1449 *map->m_next_extent = pgofs + map->m_len;
1450
1451 /* for hardware encryption, but to avoid potential issue in future */
1452 if (flag == F2FS_GET_BLOCK_DIO)
1453 f2fs_wait_on_block_writeback_range(inode,
1454 map->m_pblk, map->m_len);
1455 goto out;
1456 }
1457
1458 next_dnode:
1459 if (map->m_may_create)
1460 __do_map_lock(sbi, flag, true);
1461
1462 /* When reading holes, we need its node page */
1463 set_new_dnode(&dn, inode, NULL, NULL, 0);
1464 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1465 if (err) {
1466 if (flag == F2FS_GET_BLOCK_BMAP)
1467 map->m_pblk = 0;
1468 if (err == -ENOENT) {
1469 err = 0;
1470 if (map->m_next_pgofs)
1471 *map->m_next_pgofs =
1472 f2fs_get_next_page_offset(&dn, pgofs);
1473 if (map->m_next_extent)
1474 *map->m_next_extent =
1475 f2fs_get_next_page_offset(&dn, pgofs);
1476 }
1477 goto unlock_out;
1478 }
1479
1480 start_pgofs = pgofs;
1481 prealloc = 0;
1482 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
1483 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1484
1485 next_block:
1486 blkaddr = f2fs_data_blkaddr(&dn);
1487
1488 if (__is_valid_data_blkaddr(blkaddr) &&
1489 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
1490 err = -EFSCORRUPTED;
1491 goto sync_out;
1492 }
1493
1494 if (__is_valid_data_blkaddr(blkaddr)) {
1495 /* use out-place-update for driect IO under LFS mode */
1496 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
1497 map->m_may_create) {
1498 err = __allocate_data_block(&dn, map->m_seg_type);
1499 if (err)
1500 goto sync_out;
1501 blkaddr = dn.data_blkaddr;
1502 set_inode_flag(inode, FI_APPEND_WRITE);
1503 }
1504 } else {
1505 if (create) {
1506 if (unlikely(f2fs_cp_error(sbi))) {
1507 err = -EIO;
1508 goto sync_out;
1509 }
1510 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1511 if (blkaddr == NULL_ADDR) {
1512 prealloc++;
1513 last_ofs_in_node = dn.ofs_in_node;
1514 }
1515 } else {
1516 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1517 flag != F2FS_GET_BLOCK_DIO);
1518 err = __allocate_data_block(&dn,
1519 map->m_seg_type);
1520 if (!err)
1521 set_inode_flag(inode, FI_APPEND_WRITE);
1522 }
1523 if (err)
1524 goto sync_out;
1525 map->m_flags |= F2FS_MAP_NEW;
1526 blkaddr = dn.data_blkaddr;
1527 } else {
1528 if (flag == F2FS_GET_BLOCK_BMAP) {
1529 map->m_pblk = 0;
1530 goto sync_out;
1531 }
1532 if (flag == F2FS_GET_BLOCK_PRECACHE)
1533 goto sync_out;
1534 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1535 blkaddr == NULL_ADDR) {
1536 if (map->m_next_pgofs)
1537 *map->m_next_pgofs = pgofs + 1;
1538 goto sync_out;
1539 }
1540 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1541 /* for defragment case */
1542 if (map->m_next_pgofs)
1543 *map->m_next_pgofs = pgofs + 1;
1544 goto sync_out;
1545 }
1546 }
1547 }
1548
1549 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1550 goto skip;
1551
1552 if (map->m_len == 0) {
1553 /* preallocated unwritten block should be mapped for fiemap. */
1554 if (blkaddr == NEW_ADDR)
1555 map->m_flags |= F2FS_MAP_UNWRITTEN;
1556 map->m_flags |= F2FS_MAP_MAPPED;
1557
1558 map->m_pblk = blkaddr;
1559 map->m_len = 1;
1560 } else if ((map->m_pblk != NEW_ADDR &&
1561 blkaddr == (map->m_pblk + ofs)) ||
1562 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
1563 flag == F2FS_GET_BLOCK_PRE_DIO) {
1564 ofs++;
1565 map->m_len++;
1566 } else {
1567 goto sync_out;
1568 }
1569
1570 skip:
1571 dn.ofs_in_node++;
1572 pgofs++;
1573
1574 /* preallocate blocks in batch for one dnode page */
1575 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1576 (pgofs == end || dn.ofs_in_node == end_offset)) {
1577
1578 dn.ofs_in_node = ofs_in_node;
1579 err = f2fs_reserve_new_blocks(&dn, prealloc);
1580 if (err)
1581 goto sync_out;
1582
1583 map->m_len += dn.ofs_in_node - ofs_in_node;
1584 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1585 err = -ENOSPC;
1586 goto sync_out;
1587 }
1588 dn.ofs_in_node = end_offset;
1589 }
1590
1591 if (pgofs >= end)
1592 goto sync_out;
1593 else if (dn.ofs_in_node < end_offset)
1594 goto next_block;
1595
1596 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1597 if (map->m_flags & F2FS_MAP_MAPPED) {
1598 unsigned int ofs = start_pgofs - map->m_lblk;
1599
1600 f2fs_update_extent_cache_range(&dn,
1601 start_pgofs, map->m_pblk + ofs,
1602 map->m_len - ofs);
1603 }
1604 }
1605
1606 f2fs_put_dnode(&dn);
1607
1608 if (map->m_may_create) {
1609 __do_map_lock(sbi, flag, false);
1610 f2fs_balance_fs(sbi, dn.node_changed);
1611 }
1612 goto next_dnode;
1613
1614 sync_out:
1615
1616 /* for hardware encryption, but to avoid potential issue in future */
1617 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED)
1618 f2fs_wait_on_block_writeback_range(inode,
1619 map->m_pblk, map->m_len);
1620
1621 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1622 if (map->m_flags & F2FS_MAP_MAPPED) {
1623 unsigned int ofs = start_pgofs - map->m_lblk;
1624
1625 f2fs_update_extent_cache_range(&dn,
1626 start_pgofs, map->m_pblk + ofs,
1627 map->m_len - ofs);
1628 }
1629 if (map->m_next_extent)
1630 *map->m_next_extent = pgofs + 1;
1631 }
1632 f2fs_put_dnode(&dn);
1633 unlock_out:
1634 if (map->m_may_create) {
1635 __do_map_lock(sbi, flag, false);
1636 f2fs_balance_fs(sbi, dn.node_changed);
1637 }
1638 out:
1639 trace_f2fs_map_blocks(inode, map, err);
1640 return err;
1641 }
1642
1643 bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1644 {
1645 struct f2fs_map_blocks map;
1646 block_t last_lblk;
1647 int err;
1648
1649 if (pos + len > i_size_read(inode))
1650 return false;
1651
1652 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1653 map.m_next_pgofs = NULL;
1654 map.m_next_extent = NULL;
1655 map.m_seg_type = NO_CHECK_TYPE;
1656 map.m_may_create = false;
1657 last_lblk = F2FS_BLK_ALIGN(pos + len);
1658
1659 while (map.m_lblk < last_lblk) {
1660 map.m_len = last_lblk - map.m_lblk;
1661 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1662 if (err || map.m_len == 0)
1663 return false;
1664 map.m_lblk += map.m_len;
1665 }
1666 return true;
1667 }
1668
1669 static int __get_data_block(struct inode *inode, sector_t iblock,
1670 struct buffer_head *bh, int create, int flag,
1671 pgoff_t *next_pgofs, int seg_type, bool may_write)
1672 {
1673 struct f2fs_map_blocks map;
1674 int err;
1675
1676 map.m_lblk = iblock;
1677 map.m_len = bh->b_size >> inode->i_blkbits;
1678 map.m_next_pgofs = next_pgofs;
1679 map.m_next_extent = NULL;
1680 map.m_seg_type = seg_type;
1681 map.m_may_create = may_write;
1682
1683 err = f2fs_map_blocks(inode, &map, create, flag);
1684 if (!err) {
1685 map_bh(bh, inode->i_sb, map.m_pblk);
1686 bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags;
1687 bh->b_size = (u64)map.m_len << inode->i_blkbits;
1688 }
1689 return err;
1690 }
1691
1692 static int get_data_block(struct inode *inode, sector_t iblock,
1693 struct buffer_head *bh_result, int create, int flag,
1694 pgoff_t *next_pgofs)
1695 {
1696 return __get_data_block(inode, iblock, bh_result, create,
1697 flag, next_pgofs,
1698 NO_CHECK_TYPE, create);
1699 }
1700
1701 static int get_data_block_dio_write(struct inode *inode, sector_t iblock,
1702 struct buffer_head *bh_result, int create)
1703 {
1704 return __get_data_block(inode, iblock, bh_result, create,
1705 F2FS_GET_BLOCK_DIO, NULL,
1706 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1707 IS_SWAPFILE(inode) ? false : true);
1708 }
1709
1710 static int get_data_block_dio(struct inode *inode, sector_t iblock,
1711 struct buffer_head *bh_result, int create)
1712 {
1713 return __get_data_block(inode, iblock, bh_result, create,
1714 F2FS_GET_BLOCK_DIO, NULL,
1715 f2fs_rw_hint_to_seg_type(inode->i_write_hint),
1716 false);
1717 }
1718
1719 static int get_data_block_bmap(struct inode *inode, sector_t iblock,
1720 struct buffer_head *bh_result, int create)
1721 {
1722 /* Block number less than F2FS MAX BLOCKS */
1723 if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks))
1724 return -EFBIG;
1725
1726 return __get_data_block(inode, iblock, bh_result, create,
1727 F2FS_GET_BLOCK_BMAP, NULL,
1728 NO_CHECK_TYPE, create);
1729 }
1730
1731 static inline sector_t logical_to_blk(struct inode *inode, loff_t offset)
1732 {
1733 return (offset >> inode->i_blkbits);
1734 }
1735
1736 static inline loff_t blk_to_logical(struct inode *inode, sector_t blk)
1737 {
1738 return (blk << inode->i_blkbits);
1739 }
1740
1741 static int f2fs_xattr_fiemap(struct inode *inode,
1742 struct fiemap_extent_info *fieinfo)
1743 {
1744 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1745 struct page *page;
1746 struct node_info ni;
1747 __u64 phys = 0, len;
1748 __u32 flags;
1749 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1750 int err = 0;
1751
1752 if (f2fs_has_inline_xattr(inode)) {
1753 int offset;
1754
1755 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1756 inode->i_ino, false);
1757 if (!page)
1758 return -ENOMEM;
1759
1760 err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
1761 if (err) {
1762 f2fs_put_page(page, 1);
1763 return err;
1764 }
1765
1766 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1767 offset = offsetof(struct f2fs_inode, i_addr) +
1768 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
1769 get_inline_xattr_addrs(inode));
1770
1771 phys += offset;
1772 len = inline_xattr_size(inode);
1773
1774 f2fs_put_page(page, 1);
1775
1776 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1777
1778 if (!xnid)
1779 flags |= FIEMAP_EXTENT_LAST;
1780
1781 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1782 if (err || err == 1)
1783 return err;
1784 }
1785
1786 if (xnid) {
1787 page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false);
1788 if (!page)
1789 return -ENOMEM;
1790
1791 err = f2fs_get_node_info(sbi, xnid, &ni);
1792 if (err) {
1793 f2fs_put_page(page, 1);
1794 return err;
1795 }
1796
1797 phys = (__u64)blk_to_logical(inode, ni.blk_addr);
1798 len = inode->i_sb->s_blocksize;
1799
1800 f2fs_put_page(page, 1);
1801
1802 flags = FIEMAP_EXTENT_LAST;
1803 }
1804
1805 if (phys)
1806 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1807
1808 return (err < 0 ? err : 0);
1809 }
1810
1811 int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1812 u64 start, u64 len)
1813 {
1814 struct buffer_head map_bh;
1815 sector_t start_blk, last_blk;
1816 pgoff_t next_pgofs;
1817 u64 logical = 0, phys = 0, size = 0;
1818 u32 flags = 0;
1819 int ret = 0;
1820
1821 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1822 ret = f2fs_precache_extents(inode);
1823 if (ret)
1824 return ret;
1825 }
1826
1827 ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR);
1828 if (ret)
1829 return ret;
1830
1831 inode_lock(inode);
1832
1833 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1834 ret = f2fs_xattr_fiemap(inode, fieinfo);
1835 goto out;
1836 }
1837
1838 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
1839 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1840 if (ret != -EAGAIN)
1841 goto out;
1842 }
1843
1844 if (logical_to_blk(inode, len) == 0)
1845 len = blk_to_logical(inode, 1);
1846
1847 start_blk = logical_to_blk(inode, start);
1848 last_blk = logical_to_blk(inode, start + len - 1);
1849
1850 next:
1851 memset(&map_bh, 0, sizeof(struct buffer_head));
1852 map_bh.b_size = len;
1853
1854 ret = get_data_block(inode, start_blk, &map_bh, 0,
1855 F2FS_GET_BLOCK_FIEMAP, &next_pgofs);
1856 if (ret)
1857 goto out;
1858
1859 /* HOLE */
1860 if (!buffer_mapped(&map_bh)) {
1861 start_blk = next_pgofs;
1862
1863 if (blk_to_logical(inode, start_blk) < blk_to_logical(inode,
1864 F2FS_I_SB(inode)->max_file_blocks))
1865 goto prep_next;
1866
1867 flags |= FIEMAP_EXTENT_LAST;
1868 }
1869
1870 if (size) {
1871 if (IS_ENCRYPTED(inode))
1872 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1873
1874 ret = fiemap_fill_next_extent(fieinfo, logical,
1875 phys, size, flags);
1876 }
1877
1878 if (start_blk > last_blk || ret)
1879 goto out;
1880
1881 logical = blk_to_logical(inode, start_blk);
1882 phys = blk_to_logical(inode, map_bh.b_blocknr);
1883 size = map_bh.b_size;
1884 flags = 0;
1885 if (buffer_unwritten(&map_bh))
1886 flags = FIEMAP_EXTENT_UNWRITTEN;
1887
1888 start_blk += logical_to_blk(inode, size);
1889
1890 prep_next:
1891 cond_resched();
1892 if (fatal_signal_pending(current))
1893 ret = -EINTR;
1894 else
1895 goto next;
1896 out:
1897 if (ret == 1)
1898 ret = 0;
1899
1900 inode_unlock(inode);
1901 return ret;
1902 }
1903
1904 static inline loff_t f2fs_readpage_limit(struct inode *inode)
1905 {
1906 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1907 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1908 return inode->i_sb->s_maxbytes;
1909
1910 return i_size_read(inode);
1911 }
1912
1913 static int f2fs_read_single_page(struct inode *inode, struct page *page,
1914 unsigned nr_pages,
1915 struct f2fs_map_blocks *map,
1916 struct bio **bio_ret,
1917 sector_t *last_block_in_bio,
1918 bool is_readahead)
1919 {
1920 struct bio *bio = *bio_ret;
1921 const unsigned blkbits = inode->i_blkbits;
1922 const unsigned blocksize = 1 << blkbits;
1923 sector_t block_in_file;
1924 sector_t last_block;
1925 sector_t last_block_in_file;
1926 sector_t block_nr;
1927 int ret = 0;
1928
1929 block_in_file = (sector_t)page_index(page);
1930 last_block = block_in_file + nr_pages;
1931 last_block_in_file = (f2fs_readpage_limit(inode) + blocksize - 1) >>
1932 blkbits;
1933 if (last_block > last_block_in_file)
1934 last_block = last_block_in_file;
1935
1936 /* just zeroing out page which is beyond EOF */
1937 if (block_in_file >= last_block)
1938 goto zero_out;
1939 /*
1940 * Map blocks using the previous result first.
1941 */
1942 if ((map->m_flags & F2FS_MAP_MAPPED) &&
1943 block_in_file > map->m_lblk &&
1944 block_in_file < (map->m_lblk + map->m_len))
1945 goto got_it;
1946
1947 /*
1948 * Then do more f2fs_map_blocks() calls until we are
1949 * done with this page.
1950 */
1951 map->m_lblk = block_in_file;
1952 map->m_len = last_block - block_in_file;
1953
1954 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
1955 if (ret)
1956 goto out;
1957 got_it:
1958 if ((map->m_flags & F2FS_MAP_MAPPED)) {
1959 block_nr = map->m_pblk + block_in_file - map->m_lblk;
1960 SetPageMappedToDisk(page);
1961
1962 if (!PageUptodate(page) && (!PageSwapCache(page) &&
1963 !cleancache_get_page(page))) {
1964 SetPageUptodate(page);
1965 goto confused;
1966 }
1967
1968 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
1969 DATA_GENERIC_ENHANCE_READ)) {
1970 ret = -EFSCORRUPTED;
1971 goto out;
1972 }
1973 } else {
1974 zero_out:
1975 zero_user_segment(page, 0, PAGE_SIZE);
1976 if (f2fs_need_verity(inode, page->index) &&
1977 !fsverity_verify_page(page)) {
1978 ret = -EIO;
1979 goto out;
1980 }
1981 if (!PageUptodate(page))
1982 SetPageUptodate(page);
1983 unlock_page(page);
1984 goto out;
1985 }
1986
1987 /*
1988 * This page will go to BIO. Do we need to send this
1989 * BIO off first?
1990 */
1991 if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio,
1992 *last_block_in_bio, block_nr)) {
1993 submit_and_realloc:
1994 __submit_bio(F2FS_I_SB(inode), bio, DATA);
1995 bio = NULL;
1996 }
1997 if (bio == NULL) {
1998 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
1999 is_readahead ? REQ_RAHEAD : 0, page->index,
2000 false);
2001 if (IS_ERR(bio)) {
2002 ret = PTR_ERR(bio);
2003 bio = NULL;
2004 goto out;
2005 }
2006 }
2007
2008 /*
2009 * If the page is under writeback, we need to wait for
2010 * its completion to see the correct decrypted data.
2011 */
2012 f2fs_wait_on_block_writeback(inode, block_nr);
2013
2014 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2015 goto submit_and_realloc;
2016
2017 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
2018 ClearPageError(page);
2019 *last_block_in_bio = block_nr;
2020 goto out;
2021 confused:
2022 if (bio) {
2023 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2024 bio = NULL;
2025 }
2026 unlock_page(page);
2027 out:
2028 *bio_ret = bio;
2029 return ret;
2030 }
2031
2032 #ifdef CONFIG_F2FS_FS_COMPRESSION
2033 int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2034 unsigned nr_pages, sector_t *last_block_in_bio,
2035 bool is_readahead, bool for_write)
2036 {
2037 struct dnode_of_data dn;
2038 struct inode *inode = cc->inode;
2039 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2040 struct bio *bio = *bio_ret;
2041 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2042 sector_t last_block_in_file;
2043 const unsigned blkbits = inode->i_blkbits;
2044 const unsigned blocksize = 1 << blkbits;
2045 struct decompress_io_ctx *dic = NULL;
2046 int i;
2047 int ret = 0;
2048
2049 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2050
2051 last_block_in_file = (f2fs_readpage_limit(inode) +
2052 blocksize - 1) >> blkbits;
2053
2054 /* get rid of pages beyond EOF */
2055 for (i = 0; i < cc->cluster_size; i++) {
2056 struct page *page = cc->rpages[i];
2057
2058 if (!page)
2059 continue;
2060 if ((sector_t)page->index >= last_block_in_file) {
2061 zero_user_segment(page, 0, PAGE_SIZE);
2062 if (!PageUptodate(page))
2063 SetPageUptodate(page);
2064 } else if (!PageUptodate(page)) {
2065 continue;
2066 }
2067 unlock_page(page);
2068 cc->rpages[i] = NULL;
2069 cc->nr_rpages--;
2070 }
2071
2072 /* we are done since all pages are beyond EOF */
2073 if (f2fs_cluster_is_empty(cc))
2074 goto out;
2075
2076 set_new_dnode(&dn, inode, NULL, NULL, 0);
2077 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2078 if (ret)
2079 goto out;
2080
2081 /* cluster was overwritten as normal cluster */
2082 if (dn.data_blkaddr != COMPRESS_ADDR)
2083 goto out;
2084
2085 for (i = 1; i < cc->cluster_size; i++) {
2086 block_t blkaddr;
2087
2088 blkaddr = data_blkaddr(dn.inode, dn.node_page,
2089 dn.ofs_in_node + i);
2090
2091 if (!__is_valid_data_blkaddr(blkaddr))
2092 break;
2093
2094 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2095 ret = -EFAULT;
2096 goto out_put_dnode;
2097 }
2098 cc->nr_cpages++;
2099 }
2100
2101 /* nothing to decompress */
2102 if (cc->nr_cpages == 0) {
2103 ret = 0;
2104 goto out_put_dnode;
2105 }
2106
2107 dic = f2fs_alloc_dic(cc);
2108 if (IS_ERR(dic)) {
2109 ret = PTR_ERR(dic);
2110 goto out_put_dnode;
2111 }
2112
2113 for (i = 0; i < dic->nr_cpages; i++) {
2114 struct page *page = dic->cpages[i];
2115 block_t blkaddr;
2116
2117 blkaddr = data_blkaddr(dn.inode, dn.node_page,
2118 dn.ofs_in_node + i + 1);
2119
2120 if (bio && !page_is_mergeable(sbi, bio,
2121 *last_block_in_bio, blkaddr)) {
2122 submit_and_realloc:
2123 __submit_bio(sbi, bio, DATA);
2124 bio = NULL;
2125 }
2126
2127 if (!bio) {
2128 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2129 is_readahead ? REQ_RAHEAD : 0,
2130 page->index, for_write);
2131 if (IS_ERR(bio)) {
2132 ret = PTR_ERR(bio);
2133 bio = NULL;
2134 dic->failed = true;
2135 if (refcount_sub_and_test(dic->nr_cpages - i,
2136 &dic->ref))
2137 f2fs_decompress_end_io(dic->rpages,
2138 cc->cluster_size, true,
2139 false);
2140 f2fs_free_dic(dic);
2141 f2fs_put_dnode(&dn);
2142 *bio_ret = bio;
2143 return ret;
2144 }
2145 }
2146
2147 f2fs_wait_on_block_writeback(inode, blkaddr);
2148
2149 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2150 goto submit_and_realloc;
2151
2152 inc_page_count(sbi, F2FS_RD_DATA);
2153 ClearPageError(page);
2154 *last_block_in_bio = blkaddr;
2155 }
2156
2157 f2fs_put_dnode(&dn);
2158
2159 *bio_ret = bio;
2160 return 0;
2161
2162 out_put_dnode:
2163 f2fs_put_dnode(&dn);
2164 out:
2165 f2fs_decompress_end_io(cc->rpages, cc->cluster_size, true, false);
2166 *bio_ret = bio;
2167 return ret;
2168 }
2169 #endif
2170
2171 /*
2172 * This function was originally taken from fs/mpage.c, and customized for f2fs.
2173 * Major change was from block_size == page_size in f2fs by default.
2174 *
2175 * Note that the aops->readpages() function is ONLY used for read-ahead. If
2176 * this function ever deviates from doing just read-ahead, it should either
2177 * use ->readpage() or do the necessary surgery to decouple ->readpages()
2178 * from read-ahead.
2179 */
2180 int f2fs_mpage_readpages(struct address_space *mapping,
2181 struct list_head *pages, struct page *page,
2182 unsigned nr_pages, bool is_readahead)
2183 {
2184 struct bio *bio = NULL;
2185 sector_t last_block_in_bio = 0;
2186 struct inode *inode = mapping->host;
2187 struct f2fs_map_blocks map;
2188 #ifdef CONFIG_F2FS_FS_COMPRESSION
2189 struct compress_ctx cc = {
2190 .inode = inode,
2191 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2192 .cluster_size = F2FS_I(inode)->i_cluster_size,
2193 .cluster_idx = NULL_CLUSTER,
2194 .rpages = NULL,
2195 .cpages = NULL,
2196 .nr_rpages = 0,
2197 .nr_cpages = 0,
2198 };
2199 #endif
2200 unsigned max_nr_pages = nr_pages;
2201 int ret = 0;
2202
2203 map.m_pblk = 0;
2204 map.m_lblk = 0;
2205 map.m_len = 0;
2206 map.m_flags = 0;
2207 map.m_next_pgofs = NULL;
2208 map.m_next_extent = NULL;
2209 map.m_seg_type = NO_CHECK_TYPE;
2210 map.m_may_create = false;
2211
2212 for (; nr_pages; nr_pages--) {
2213 if (pages) {
2214 page = list_last_entry(pages, struct page, lru);
2215
2216 prefetchw(&page->flags);
2217 list_del(&page->lru);
2218 if (add_to_page_cache_lru(page, mapping,
2219 page_index(page),
2220 readahead_gfp_mask(mapping)))
2221 goto next_page;
2222 }
2223
2224 #ifdef CONFIG_F2FS_FS_COMPRESSION
2225 if (f2fs_compressed_file(inode)) {
2226 /* there are remained comressed pages, submit them */
2227 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2228 ret = f2fs_read_multi_pages(&cc, &bio,
2229 max_nr_pages,
2230 &last_block_in_bio,
2231 is_readahead, false);
2232 f2fs_destroy_compress_ctx(&cc);
2233 if (ret)
2234 goto set_error_page;
2235 }
2236 ret = f2fs_is_compressed_cluster(inode, page->index);
2237 if (ret < 0)
2238 goto set_error_page;
2239 else if (!ret)
2240 goto read_single_page;
2241
2242 ret = f2fs_init_compress_ctx(&cc);
2243 if (ret)
2244 goto set_error_page;
2245
2246 f2fs_compress_ctx_add_page(&cc, page);
2247
2248 goto next_page;
2249 }
2250 read_single_page:
2251 #endif
2252
2253 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
2254 &bio, &last_block_in_bio, is_readahead);
2255 if (ret) {
2256 #ifdef CONFIG_F2FS_FS_COMPRESSION
2257 set_error_page:
2258 #endif
2259 SetPageError(page);
2260 zero_user_segment(page, 0, PAGE_SIZE);
2261 unlock_page(page);
2262 }
2263 next_page:
2264 if (pages)
2265 put_page(page);
2266
2267 #ifdef CONFIG_F2FS_FS_COMPRESSION
2268 if (f2fs_compressed_file(inode)) {
2269 /* last page */
2270 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2271 ret = f2fs_read_multi_pages(&cc, &bio,
2272 max_nr_pages,
2273 &last_block_in_bio,
2274 is_readahead, false);
2275 f2fs_destroy_compress_ctx(&cc);
2276 }
2277 }
2278 #endif
2279 }
2280 BUG_ON(pages && !list_empty(pages));
2281 if (bio)
2282 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2283 return pages ? 0 : ret;
2284 }
2285
2286 static int f2fs_read_data_page(struct file *file, struct page *page)
2287 {
2288 struct inode *inode = page_file_mapping(page)->host;
2289 int ret = -EAGAIN;
2290
2291 trace_f2fs_readpage(page, DATA);
2292
2293 if (!f2fs_is_compress_backend_ready(inode)) {
2294 unlock_page(page);
2295 return -EOPNOTSUPP;
2296 }
2297
2298 /* If the file has inline data, try to read it directly */
2299 if (f2fs_has_inline_data(inode))
2300 ret = f2fs_read_inline_data(inode, page);
2301 if (ret == -EAGAIN)
2302 ret = f2fs_mpage_readpages(page_file_mapping(page),
2303 NULL, page, 1, false);
2304 return ret;
2305 }
2306
2307 static int f2fs_read_data_pages(struct file *file,
2308 struct address_space *mapping,
2309 struct list_head *pages, unsigned nr_pages)
2310 {
2311 struct inode *inode = mapping->host;
2312 struct page *page = list_last_entry(pages, struct page, lru);
2313
2314 trace_f2fs_readpages(inode, page, nr_pages);
2315
2316 if (!f2fs_is_compress_backend_ready(inode))
2317 return 0;
2318
2319 /* If the file has inline data, skip readpages */
2320 if (f2fs_has_inline_data(inode))
2321 return 0;
2322
2323 return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true);
2324 }
2325
2326 int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
2327 {
2328 struct inode *inode = fio->page->mapping->host;
2329 struct page *mpage, *page;
2330 gfp_t gfp_flags = GFP_NOFS;
2331
2332 if (!f2fs_encrypted_file(inode))
2333 return 0;
2334
2335 page = fio->compressed_page ? fio->compressed_page : fio->page;
2336
2337 /* wait for GCed page writeback via META_MAPPING */
2338 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
2339
2340 retry_encrypt:
2341 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2342 PAGE_SIZE, 0, gfp_flags);
2343 if (IS_ERR(fio->encrypted_page)) {
2344 /* flush pending IOs and wait for a while in the ENOMEM case */
2345 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2346 f2fs_flush_merged_writes(fio->sbi);
2347 congestion_wait(BLK_RW_ASYNC, DEFAULT_IO_TIMEOUT);
2348 gfp_flags |= __GFP_NOFAIL;
2349 goto retry_encrypt;
2350 }
2351 return PTR_ERR(fio->encrypted_page);
2352 }
2353
2354 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2355 if (mpage) {
2356 if (PageUptodate(mpage))
2357 memcpy(page_address(mpage),
2358 page_address(fio->encrypted_page), PAGE_SIZE);
2359 f2fs_put_page(mpage, 1);
2360 }
2361 return 0;
2362 }
2363
2364 static inline bool check_inplace_update_policy(struct inode *inode,
2365 struct f2fs_io_info *fio)
2366 {
2367 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2368 unsigned int policy = SM_I(sbi)->ipu_policy;
2369
2370 if (policy & (0x1 << F2FS_IPU_FORCE))
2371 return true;
2372 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
2373 return true;
2374 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2375 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2376 return true;
2377 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
2378 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2379 return true;
2380
2381 /*
2382 * IPU for rewrite async pages
2383 */
2384 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2385 fio && fio->op == REQ_OP_WRITE &&
2386 !(fio->op_flags & REQ_SYNC) &&
2387 !IS_ENCRYPTED(inode))
2388 return true;
2389
2390 /* this is only set during fdatasync */
2391 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2392 is_inode_flag_set(inode, FI_NEED_IPU))
2393 return true;
2394
2395 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2396 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2397 return true;
2398
2399 return false;
2400 }
2401
2402 bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
2403 {
2404 if (f2fs_is_pinned_file(inode))
2405 return true;
2406
2407 /* if this is cold file, we should overwrite to avoid fragmentation */
2408 if (file_is_cold(inode))
2409 return true;
2410
2411 return check_inplace_update_policy(inode, fio);
2412 }
2413
2414 bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
2415 {
2416 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2417
2418 if (f2fs_lfs_mode(sbi))
2419 return true;
2420 if (S_ISDIR(inode->i_mode))
2421 return true;
2422 if (IS_NOQUOTA(inode))
2423 return true;
2424 if (f2fs_is_atomic_file(inode))
2425 return true;
2426 if (fio) {
2427 if (is_cold_data(fio->page))
2428 return true;
2429 if (IS_ATOMIC_WRITTEN_PAGE(fio->page))
2430 return true;
2431 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2432 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2433 return true;
2434 }
2435 return false;
2436 }
2437
2438 static inline bool need_inplace_update(struct f2fs_io_info *fio)
2439 {
2440 struct inode *inode = fio->page->mapping->host;
2441
2442 if (f2fs_should_update_outplace(inode, fio))
2443 return false;
2444
2445 return f2fs_should_update_inplace(inode, fio);
2446 }
2447
2448 int f2fs_do_write_data_page(struct f2fs_io_info *fio)
2449 {
2450 struct page *page = fio->page;
2451 struct inode *inode = page->mapping->host;
2452 struct dnode_of_data dn;
2453 struct extent_info ei = {0,0,0};
2454 struct node_info ni;
2455 bool ipu_force = false;
2456 int err = 0;
2457
2458 set_new_dnode(&dn, inode, NULL, NULL, 0);
2459 if (need_inplace_update(fio) &&
2460 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2461 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
2462
2463 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
2464 DATA_GENERIC_ENHANCE))
2465 return -EFSCORRUPTED;
2466
2467 ipu_force = true;
2468 fio->need_lock = LOCK_DONE;
2469 goto got_it;
2470 }
2471
2472 /* Deadlock due to between page->lock and f2fs_lock_op */
2473 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2474 return -EAGAIN;
2475
2476 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
2477 if (err)
2478 goto out;
2479
2480 fio->old_blkaddr = dn.data_blkaddr;
2481
2482 /* This page is already truncated */
2483 if (fio->old_blkaddr == NULL_ADDR) {
2484 ClearPageUptodate(page);
2485 clear_cold_data(page);
2486 goto out_writepage;
2487 }
2488 got_it:
2489 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2490 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
2491 DATA_GENERIC_ENHANCE)) {
2492 err = -EFSCORRUPTED;
2493 goto out_writepage;
2494 }
2495 /*
2496 * If current allocation needs SSR,
2497 * it had better in-place writes for updated data.
2498 */
2499 if (ipu_force ||
2500 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2501 need_inplace_update(fio))) {
2502 err = f2fs_encrypt_one_page(fio);
2503 if (err)
2504 goto out_writepage;
2505
2506 set_page_writeback(page);
2507 ClearPageError(page);
2508 f2fs_put_dnode(&dn);
2509 if (fio->need_lock == LOCK_REQ)
2510 f2fs_unlock_op(fio->sbi);
2511 err = f2fs_inplace_write_data(fio);
2512 if (err) {
2513 if (f2fs_encrypted_file(inode))
2514 fscrypt_finalize_bounce_page(&fio->encrypted_page);
2515 if (PageWriteback(page))
2516 end_page_writeback(page);
2517 } else {
2518 set_inode_flag(inode, FI_UPDATE_WRITE);
2519 }
2520 trace_f2fs_do_write_data_page(fio->page, IPU);
2521 return err;
2522 }
2523
2524 if (fio->need_lock == LOCK_RETRY) {
2525 if (!f2fs_trylock_op(fio->sbi)) {
2526 err = -EAGAIN;
2527 goto out_writepage;
2528 }
2529 fio->need_lock = LOCK_REQ;
2530 }
2531
2532 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni);
2533 if (err)
2534 goto out_writepage;
2535
2536 fio->version = ni.version;
2537
2538 err = f2fs_encrypt_one_page(fio);
2539 if (err)
2540 goto out_writepage;
2541
2542 set_page_writeback(page);
2543 ClearPageError(page);
2544
2545 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2546 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2547
2548 /* LFS mode write path */
2549 f2fs_outplace_write_data(&dn, fio);
2550 trace_f2fs_do_write_data_page(page, OPU);
2551 set_inode_flag(inode, FI_APPEND_WRITE);
2552 if (page->index == 0)
2553 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
2554 out_writepage:
2555 f2fs_put_dnode(&dn);
2556 out:
2557 if (fio->need_lock == LOCK_REQ)
2558 f2fs_unlock_op(fio->sbi);
2559 return err;
2560 }
2561
2562 int f2fs_write_single_data_page(struct page *page, int *submitted,
2563 struct bio **bio,
2564 sector_t *last_block,
2565 struct writeback_control *wbc,
2566 enum iostat_type io_type,
2567 int compr_blocks)
2568 {
2569 struct inode *inode = page->mapping->host;
2570 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2571 loff_t i_size = i_size_read(inode);
2572 const pgoff_t end_index = ((unsigned long long)i_size)
2573 >> PAGE_SHIFT;
2574 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
2575 unsigned offset = 0;
2576 bool need_balance_fs = false;
2577 int err = 0;
2578 struct f2fs_io_info fio = {
2579 .sbi = sbi,
2580 .ino = inode->i_ino,
2581 .type = DATA,
2582 .op = REQ_OP_WRITE,
2583 .op_flags = wbc_to_write_flags(wbc),
2584 .old_blkaddr = NULL_ADDR,
2585 .page = page,
2586 .encrypted_page = NULL,
2587 .submitted = false,
2588 .compr_blocks = compr_blocks,
2589 .need_lock = LOCK_RETRY,
2590 .io_type = io_type,
2591 .io_wbc = wbc,
2592 .bio = bio,
2593 .last_block = last_block,
2594 };
2595
2596 trace_f2fs_writepage(page, DATA);
2597
2598 /* we should bypass data pages to proceed the kworkder jobs */
2599 if (unlikely(f2fs_cp_error(sbi))) {
2600 mapping_set_error(page->mapping, -EIO);
2601 /*
2602 * don't drop any dirty dentry pages for keeping lastest
2603 * directory structure.
2604 */
2605 if (S_ISDIR(inode->i_mode))
2606 goto redirty_out;
2607 goto out;
2608 }
2609
2610 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2611 goto redirty_out;
2612
2613 if (page->index < end_index ||
2614 f2fs_verity_in_progress(inode) ||
2615 compr_blocks)
2616 goto write;
2617
2618 /*
2619 * If the offset is out-of-range of file size,
2620 * this page does not have to be written to disk.
2621 */
2622 offset = i_size & (PAGE_SIZE - 1);
2623 if ((page->index >= end_index + 1) || !offset)
2624 goto out;
2625
2626 zero_user_segment(page, offset, PAGE_SIZE);
2627 write:
2628 if (f2fs_is_drop_cache(inode))
2629 goto out;
2630 /* we should not write 0'th page having journal header */
2631 if (f2fs_is_volatile_file(inode) && (!page->index ||
2632 (!wbc->for_reclaim &&
2633 f2fs_available_free_memory(sbi, BASE_CHECK))))
2634 goto redirty_out;
2635
2636 /* Dentry blocks are controlled by checkpoint */
2637 if (S_ISDIR(inode->i_mode)) {
2638 fio.need_lock = LOCK_DONE;
2639 err = f2fs_do_write_data_page(&fio);
2640 goto done;
2641 }
2642
2643 if (!wbc->for_reclaim)
2644 need_balance_fs = true;
2645 else if (has_not_enough_free_secs(sbi, 0, 0))
2646 goto redirty_out;
2647 else
2648 set_inode_flag(inode, FI_HOT_DATA);
2649
2650 err = -EAGAIN;
2651 if (f2fs_has_inline_data(inode)) {
2652 err = f2fs_write_inline_data(inode, page);
2653 if (!err)
2654 goto out;
2655 }
2656
2657 if (err == -EAGAIN) {
2658 err = f2fs_do_write_data_page(&fio);
2659 if (err == -EAGAIN) {
2660 fio.need_lock = LOCK_REQ;
2661 err = f2fs_do_write_data_page(&fio);
2662 }
2663 }
2664
2665 if (err) {
2666 file_set_keep_isize(inode);
2667 } else {
2668 spin_lock(&F2FS_I(inode)->i_size_lock);
2669 if (F2FS_I(inode)->last_disk_size < psize)
2670 F2FS_I(inode)->last_disk_size = psize;
2671 spin_unlock(&F2FS_I(inode)->i_size_lock);
2672 }
2673
2674 done:
2675 if (err && err != -ENOENT)
2676 goto redirty_out;
2677
2678 out:
2679 inode_dec_dirty_pages(inode);
2680 if (err) {
2681 ClearPageUptodate(page);
2682 clear_cold_data(page);
2683 }
2684
2685 if (wbc->for_reclaim) {
2686 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
2687 clear_inode_flag(inode, FI_HOT_DATA);
2688 f2fs_remove_dirty_inode(inode);
2689 submitted = NULL;
2690 }
2691 unlock_page(page);
2692 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
2693 !F2FS_I(inode)->cp_task)
2694 f2fs_balance_fs(sbi, need_balance_fs);
2695
2696 if (unlikely(f2fs_cp_error(sbi))) {
2697 f2fs_submit_merged_write(sbi, DATA);
2698 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
2699 submitted = NULL;
2700 }
2701
2702 if (submitted)
2703 *submitted = fio.submitted ? 1 : 0;
2704
2705 return 0;
2706
2707 redirty_out:
2708 redirty_page_for_writepage(wbc, page);
2709 /*
2710 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2711 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2712 * file_write_and_wait_range() will see EIO error, which is critical
2713 * to return value of fsync() followed by atomic_write failure to user.
2714 */
2715 if (!err || wbc->for_reclaim)
2716 return AOP_WRITEPAGE_ACTIVATE;
2717 unlock_page(page);
2718 return err;
2719 }
2720
2721 static int f2fs_write_data_page(struct page *page,
2722 struct writeback_control *wbc)
2723 {
2724 #ifdef CONFIG_F2FS_FS_COMPRESSION
2725 struct inode *inode = page->mapping->host;
2726
2727 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2728 goto out;
2729
2730 if (f2fs_compressed_file(inode)) {
2731 if (f2fs_is_compressed_cluster(inode, page->index)) {
2732 redirty_page_for_writepage(wbc, page);
2733 return AOP_WRITEPAGE_ACTIVATE;
2734 }
2735 }
2736 out:
2737 #endif
2738
2739 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
2740 wbc, FS_DATA_IO, 0);
2741 }
2742
2743 /*
2744 * This function was copied from write_cche_pages from mm/page-writeback.c.
2745 * The major change is making write step of cold data page separately from
2746 * warm/hot data page.
2747 */
2748 static int f2fs_write_cache_pages(struct address_space *mapping,
2749 struct writeback_control *wbc,
2750 enum iostat_type io_type)
2751 {
2752 int ret = 0;
2753 int done = 0, retry = 0;
2754 struct pagevec pvec;
2755 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
2756 struct bio *bio = NULL;
2757 sector_t last_block;
2758 #ifdef CONFIG_F2FS_FS_COMPRESSION
2759 struct inode *inode = mapping->host;
2760 struct compress_ctx cc = {
2761 .inode = inode,
2762 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2763 .cluster_size = F2FS_I(inode)->i_cluster_size,
2764 .cluster_idx = NULL_CLUSTER,
2765 .rpages = NULL,
2766 .nr_rpages = 0,
2767 .cpages = NULL,
2768 .rbuf = NULL,
2769 .cbuf = NULL,
2770 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2771 .private = NULL,
2772 };
2773 #endif
2774 int nr_pages;
2775 pgoff_t uninitialized_var(writeback_index);
2776 pgoff_t index;
2777 pgoff_t end; /* Inclusive */
2778 pgoff_t done_index;
2779 int cycled;
2780 int range_whole = 0;
2781 xa_mark_t tag;
2782 int nwritten = 0;
2783 int submitted = 0;
2784 int i;
2785
2786 pagevec_init(&pvec);
2787
2788 if (get_dirty_pages(mapping->host) <=
2789 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2790 set_inode_flag(mapping->host, FI_HOT_DATA);
2791 else
2792 clear_inode_flag(mapping->host, FI_HOT_DATA);
2793
2794 if (wbc->range_cyclic) {
2795 writeback_index = mapping->writeback_index; /* prev offset */
2796 index = writeback_index;
2797 if (index == 0)
2798 cycled = 1;
2799 else
2800 cycled = 0;
2801 end = -1;
2802 } else {
2803 index = wbc->range_start >> PAGE_SHIFT;
2804 end = wbc->range_end >> PAGE_SHIFT;
2805 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2806 range_whole = 1;
2807 cycled = 1; /* ignore range_cyclic tests */
2808 }
2809 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2810 tag = PAGECACHE_TAG_TOWRITE;
2811 else
2812 tag = PAGECACHE_TAG_DIRTY;
2813 retry:
2814 retry = 0;
2815 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2816 tag_pages_for_writeback(mapping, index, end);
2817 done_index = index;
2818 while (!done && !retry && (index <= end)) {
2819 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
2820 tag);
2821 if (nr_pages == 0)
2822 break;
2823
2824 for (i = 0; i < nr_pages; i++) {
2825 struct page *page = pvec.pages[i];
2826 bool need_readd;
2827 readd:
2828 need_readd = false;
2829 #ifdef CONFIG_F2FS_FS_COMPRESSION
2830 if (f2fs_compressed_file(inode)) {
2831 ret = f2fs_init_compress_ctx(&cc);
2832 if (ret) {
2833 done = 1;
2834 break;
2835 }
2836
2837 if (!f2fs_cluster_can_merge_page(&cc,
2838 page->index)) {
2839 ret = f2fs_write_multi_pages(&cc,
2840 &submitted, wbc, io_type);
2841 if (!ret)
2842 need_readd = true;
2843 goto result;
2844 }
2845
2846 if (unlikely(f2fs_cp_error(sbi)))
2847 goto lock_page;
2848
2849 if (f2fs_cluster_is_empty(&cc)) {
2850 void *fsdata = NULL;
2851 struct page *pagep;
2852 int ret2;
2853
2854 ret2 = f2fs_prepare_compress_overwrite(
2855 inode, &pagep,
2856 page->index, &fsdata);
2857 if (ret2 < 0) {
2858 ret = ret2;
2859 done = 1;
2860 break;
2861 } else if (ret2 &&
2862 !f2fs_compress_write_end(inode,
2863 fsdata, page->index,
2864 1)) {
2865 retry = 1;
2866 break;
2867 }
2868 } else {
2869 goto lock_page;
2870 }
2871 }
2872 #endif
2873 /* give a priority to WB_SYNC threads */
2874 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
2875 wbc->sync_mode == WB_SYNC_NONE) {
2876 done = 1;
2877 break;
2878 }
2879 #ifdef CONFIG_F2FS_FS_COMPRESSION
2880 lock_page:
2881 #endif
2882 done_index = page->index;
2883 retry_write:
2884 lock_page(page);
2885
2886 if (unlikely(page->mapping != mapping)) {
2887 continue_unlock:
2888 unlock_page(page);
2889 continue;
2890 }
2891
2892 if (!PageDirty(page)) {
2893 /* someone wrote it for us */
2894 goto continue_unlock;
2895 }
2896
2897 if (PageWriteback(page)) {
2898 if (wbc->sync_mode != WB_SYNC_NONE)
2899 f2fs_wait_on_page_writeback(page,
2900 DATA, true, true);
2901 else
2902 goto continue_unlock;
2903 }
2904
2905 if (!clear_page_dirty_for_io(page))
2906 goto continue_unlock;
2907
2908 #ifdef CONFIG_F2FS_FS_COMPRESSION
2909 if (f2fs_compressed_file(inode)) {
2910 get_page(page);
2911 f2fs_compress_ctx_add_page(&cc, page);
2912 continue;
2913 }
2914 #endif
2915 ret = f2fs_write_single_data_page(page, &submitted,
2916 &bio, &last_block, wbc, io_type, 0);
2917 if (ret == AOP_WRITEPAGE_ACTIVATE)
2918 unlock_page(page);
2919 #ifdef CONFIG_F2FS_FS_COMPRESSION
2920 result:
2921 #endif
2922 nwritten += submitted;
2923 wbc->nr_to_write -= submitted;
2924
2925 if (unlikely(ret)) {
2926 /*
2927 * keep nr_to_write, since vfs uses this to
2928 * get # of written pages.
2929 */
2930 if (ret == AOP_WRITEPAGE_ACTIVATE) {
2931 ret = 0;
2932 goto next;
2933 } else if (ret == -EAGAIN) {
2934 ret = 0;
2935 if (wbc->sync_mode == WB_SYNC_ALL) {
2936 cond_resched();
2937 congestion_wait(BLK_RW_ASYNC,
2938 DEFAULT_IO_TIMEOUT);
2939 goto retry_write;
2940 }
2941 goto next;
2942 }
2943 done_index = page->index + 1;
2944 done = 1;
2945 break;
2946 }
2947
2948 if (wbc->nr_to_write <= 0 &&
2949 wbc->sync_mode == WB_SYNC_NONE) {
2950 done = 1;
2951 break;
2952 }
2953 next:
2954 if (need_readd)
2955 goto readd;
2956 }
2957 pagevec_release(&pvec);
2958 cond_resched();
2959 }
2960 #ifdef CONFIG_F2FS_FS_COMPRESSION
2961 /* flush remained pages in compress cluster */
2962 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
2963 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
2964 nwritten += submitted;
2965 wbc->nr_to_write -= submitted;
2966 if (ret) {
2967 done = 1;
2968 retry = 0;
2969 }
2970 }
2971 #endif
2972 if ((!cycled && !done) || retry) {
2973 cycled = 1;
2974 index = 0;
2975 end = writeback_index - 1;
2976 goto retry;
2977 }
2978 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
2979 mapping->writeback_index = done_index;
2980
2981 if (nwritten)
2982 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
2983 NULL, 0, DATA);
2984 /* submit cached bio of IPU write */
2985 if (bio)
2986 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
2987
2988 return ret;
2989 }
2990
2991 static inline bool __should_serialize_io(struct inode *inode,
2992 struct writeback_control *wbc)
2993 {
2994 /* to avoid deadlock in path of data flush */
2995 if (F2FS_I(inode)->cp_task)
2996 return false;
2997
2998 if (!S_ISREG(inode->i_mode))
2999 return false;
3000 if (IS_NOQUOTA(inode))
3001 return false;
3002
3003 if (f2fs_compressed_file(inode))
3004 return true;
3005 if (wbc->sync_mode != WB_SYNC_ALL)
3006 return true;
3007 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
3008 return true;
3009 return false;
3010 }
3011
3012 static int __f2fs_write_data_pages(struct address_space *mapping,
3013 struct writeback_control *wbc,
3014 enum iostat_type io_type)
3015 {
3016 struct inode *inode = mapping->host;
3017 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3018 struct blk_plug plug;
3019 int ret;
3020 bool locked = false;
3021
3022 /* deal with chardevs and other special file */
3023 if (!mapping->a_ops->writepage)
3024 return 0;
3025
3026 /* skip writing if there is no dirty page in this inode */
3027 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3028 return 0;
3029
3030 /* during POR, we don't need to trigger writepage at all. */
3031 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3032 goto skip_write;
3033
3034 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3035 wbc->sync_mode == WB_SYNC_NONE &&
3036 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
3037 f2fs_available_free_memory(sbi, DIRTY_DENTS))
3038 goto skip_write;
3039
3040 /* skip writing during file defragment */
3041 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
3042 goto skip_write;
3043
3044 trace_f2fs_writepages(mapping->host, wbc, DATA);
3045
3046 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
3047 if (wbc->sync_mode == WB_SYNC_ALL)
3048 atomic_inc(&sbi->wb_sync_req[DATA]);
3049 else if (atomic_read(&sbi->wb_sync_req[DATA]))
3050 goto skip_write;
3051
3052 if (__should_serialize_io(inode, wbc)) {
3053 mutex_lock(&sbi->writepages);
3054 locked = true;
3055 }
3056
3057 blk_start_plug(&plug);
3058 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
3059 blk_finish_plug(&plug);
3060
3061 if (locked)
3062 mutex_unlock(&sbi->writepages);
3063
3064 if (wbc->sync_mode == WB_SYNC_ALL)
3065 atomic_dec(&sbi->wb_sync_req[DATA]);
3066 /*
3067 * if some pages were truncated, we cannot guarantee its mapping->host
3068 * to detect pending bios.
3069 */
3070
3071 f2fs_remove_dirty_inode(inode);
3072 return ret;
3073
3074 skip_write:
3075 wbc->pages_skipped += get_dirty_pages(inode);
3076 trace_f2fs_writepages(mapping->host, wbc, DATA);
3077 return 0;
3078 }
3079
3080 static int f2fs_write_data_pages(struct address_space *mapping,
3081 struct writeback_control *wbc)
3082 {
3083 struct inode *inode = mapping->host;
3084
3085 return __f2fs_write_data_pages(mapping, wbc,
3086 F2FS_I(inode)->cp_task == current ?
3087 FS_CP_DATA_IO : FS_DATA_IO);
3088 }
3089
3090 static void f2fs_write_failed(struct address_space *mapping, loff_t to)
3091 {
3092 struct inode *inode = mapping->host;
3093 loff_t i_size = i_size_read(inode);
3094
3095 if (IS_NOQUOTA(inode))
3096 return;
3097
3098 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
3099 if (to > i_size && !f2fs_verity_in_progress(inode)) {
3100 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3101 down_write(&F2FS_I(inode)->i_mmap_sem);
3102
3103 truncate_pagecache(inode, i_size);
3104 f2fs_truncate_blocks(inode, i_size, true);
3105
3106 up_write(&F2FS_I(inode)->i_mmap_sem);
3107 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3108 }
3109 }
3110
3111 static int prepare_write_begin(struct f2fs_sb_info *sbi,
3112 struct page *page, loff_t pos, unsigned len,
3113 block_t *blk_addr, bool *node_changed)
3114 {
3115 struct inode *inode = page->mapping->host;
3116 pgoff_t index = page->index;
3117 struct dnode_of_data dn;
3118 struct page *ipage;
3119 bool locked = false;
3120 struct extent_info ei = {0,0,0};
3121 int err = 0;
3122 int flag;
3123
3124 /*
3125 * we already allocated all the blocks, so we don't need to get
3126 * the block addresses when there is no need to fill the page.
3127 */
3128 if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE &&
3129 !is_inode_flag_set(inode, FI_NO_PREALLOC) &&
3130 !f2fs_verity_in_progress(inode))
3131 return 0;
3132
3133 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
3134 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3135 flag = F2FS_GET_BLOCK_DEFAULT;
3136 else
3137 flag = F2FS_GET_BLOCK_PRE_AIO;
3138
3139 if (f2fs_has_inline_data(inode) ||
3140 (pos & PAGE_MASK) >= i_size_read(inode)) {
3141 __do_map_lock(sbi, flag, true);
3142 locked = true;
3143 }
3144
3145 restart:
3146 /* check inline_data */
3147 ipage = f2fs_get_node_page(sbi, inode->i_ino);
3148 if (IS_ERR(ipage)) {
3149 err = PTR_ERR(ipage);
3150 goto unlock_out;
3151 }
3152
3153 set_new_dnode(&dn, inode, ipage, ipage, 0);
3154
3155 if (f2fs_has_inline_data(inode)) {
3156 if (pos + len <= MAX_INLINE_DATA(inode)) {
3157 f2fs_do_read_inline_data(page, ipage);
3158 set_inode_flag(inode, FI_DATA_EXIST);
3159 if (inode->i_nlink)
3160 set_inline_node(ipage);
3161 } else {
3162 err = f2fs_convert_inline_page(&dn, page);
3163 if (err)
3164 goto out;
3165 if (dn.data_blkaddr == NULL_ADDR)
3166 err = f2fs_get_block(&dn, index);
3167 }
3168 } else if (locked) {
3169 err = f2fs_get_block(&dn, index);
3170 } else {
3171 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3172 dn.data_blkaddr = ei.blk + index - ei.fofs;
3173 } else {
3174 /* hole case */
3175 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
3176 if (err || dn.data_blkaddr == NULL_ADDR) {
3177 f2fs_put_dnode(&dn);
3178 __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
3179 true);
3180 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
3181 locked = true;
3182 goto restart;
3183 }
3184 }
3185 }
3186
3187 /* convert_inline_page can make node_changed */
3188 *blk_addr = dn.data_blkaddr;
3189 *node_changed = dn.node_changed;
3190 out:
3191 f2fs_put_dnode(&dn);
3192 unlock_out:
3193 if (locked)
3194 __do_map_lock(sbi, flag, false);
3195 return err;
3196 }
3197
3198 static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3199 loff_t pos, unsigned len, unsigned flags,
3200 struct page **pagep, void **fsdata)
3201 {
3202 struct inode *inode = mapping->host;
3203 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3204 struct page *page = NULL;
3205 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
3206 bool need_balance = false, drop_atomic = false;
3207 block_t blkaddr = NULL_ADDR;
3208 int err = 0;
3209
3210 trace_f2fs_write_begin(inode, pos, len, flags);
3211
3212 if (!f2fs_is_checkpoint_ready(sbi)) {
3213 err = -ENOSPC;
3214 goto fail;
3215 }
3216
3217 if ((f2fs_is_atomic_file(inode) &&
3218 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3219 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
3220 err = -ENOMEM;
3221 drop_atomic = true;
3222 goto fail;
3223 }
3224
3225 /*
3226 * We should check this at this moment to avoid deadlock on inode page
3227 * and #0 page. The locking rule for inline_data conversion should be:
3228 * lock_page(page #0) -> lock_page(inode_page)
3229 */
3230 if (index != 0) {
3231 err = f2fs_convert_inline_inode(inode);
3232 if (err)
3233 goto fail;
3234 }
3235
3236 #ifdef CONFIG_F2FS_FS_COMPRESSION
3237 if (f2fs_compressed_file(inode)) {
3238 int ret;
3239
3240 *fsdata = NULL;
3241
3242 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3243 index, fsdata);
3244 if (ret < 0) {
3245 err = ret;
3246 goto fail;
3247 } else if (ret) {
3248 return 0;
3249 }
3250 }
3251 #endif
3252
3253 repeat:
3254 /*
3255 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
3256 * wait_for_stable_page. Will wait that below with our IO control.
3257 */
3258 page = f2fs_pagecache_get_page(mapping, index,
3259 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3260 if (!page) {
3261 err = -ENOMEM;
3262 goto fail;
3263 }
3264
3265 /* TODO: cluster can be compressed due to race with .writepage */
3266
3267 *pagep = page;
3268
3269 err = prepare_write_begin(sbi, page, pos, len,
3270 &blkaddr, &need_balance);
3271 if (err)
3272 goto fail;
3273
3274 if (need_balance && !IS_NOQUOTA(inode) &&
3275 has_not_enough_free_secs(sbi, 0, 0)) {
3276 unlock_page(page);
3277 f2fs_balance_fs(sbi, true);
3278 lock_page(page);
3279 if (page->mapping != mapping) {
3280 /* The page got truncated from under us */
3281 f2fs_put_page(page, 1);
3282 goto repeat;
3283 }
3284 }
3285
3286 f2fs_wait_on_page_writeback(page, DATA, false, true);
3287
3288 if (len == PAGE_SIZE || PageUptodate(page))
3289 return 0;
3290
3291 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3292 !f2fs_verity_in_progress(inode)) {
3293 zero_user_segment(page, len, PAGE_SIZE);
3294 return 0;
3295 }
3296
3297 if (blkaddr == NEW_ADDR) {
3298 zero_user_segment(page, 0, PAGE_SIZE);
3299 SetPageUptodate(page);
3300 } else {
3301 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3302 DATA_GENERIC_ENHANCE_READ)) {
3303 err = -EFSCORRUPTED;
3304 goto fail;
3305 }
3306 err = f2fs_submit_page_read(inode, page, blkaddr, true);
3307 if (err)
3308 goto fail;
3309
3310 lock_page(page);
3311 if (unlikely(page->mapping != mapping)) {
3312 f2fs_put_page(page, 1);
3313 goto repeat;
3314 }
3315 if (unlikely(!PageUptodate(page))) {
3316 err = -EIO;
3317 goto fail;
3318 }
3319 }
3320 return 0;
3321
3322 fail:
3323 f2fs_put_page(page, 1);
3324 f2fs_write_failed(mapping, pos + len);
3325 if (drop_atomic)
3326 f2fs_drop_inmem_pages_all(sbi, false);
3327 return err;
3328 }
3329
3330 static int f2fs_write_end(struct file *file,
3331 struct address_space *mapping,
3332 loff_t pos, unsigned len, unsigned copied,
3333 struct page *page, void *fsdata)
3334 {
3335 struct inode *inode = page->mapping->host;
3336
3337 trace_f2fs_write_end(inode, pos, len, copied);
3338
3339 /*
3340 * This should be come from len == PAGE_SIZE, and we expect copied
3341 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
3342 * let generic_perform_write() try to copy data again through copied=0.
3343 */
3344 if (!PageUptodate(page)) {
3345 if (unlikely(copied != len))
3346 copied = 0;
3347 else
3348 SetPageUptodate(page);
3349 }
3350
3351 #ifdef CONFIG_F2FS_FS_COMPRESSION
3352 /* overwrite compressed file */
3353 if (f2fs_compressed_file(inode) && fsdata) {
3354 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3355 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3356 return copied;
3357 }
3358 #endif
3359
3360 if (!copied)
3361 goto unlock_out;
3362
3363 set_page_dirty(page);
3364
3365 if (pos + copied > i_size_read(inode) &&
3366 !f2fs_verity_in_progress(inode))
3367 f2fs_i_size_write(inode, pos + copied);
3368 unlock_out:
3369 f2fs_put_page(page, 1);
3370 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3371 return copied;
3372 }
3373
3374 static int check_direct_IO(struct inode *inode, struct iov_iter *iter,
3375 loff_t offset)
3376 {
3377 unsigned i_blkbits = READ_ONCE(inode->i_blkbits);
3378 unsigned blkbits = i_blkbits;
3379 unsigned blocksize_mask = (1 << blkbits) - 1;
3380 unsigned long align = offset | iov_iter_alignment(iter);
3381 struct block_device *bdev = inode->i_sb->s_bdev;
3382
3383 if (align & blocksize_mask) {
3384 if (bdev)
3385 blkbits = blksize_bits(bdev_logical_block_size(bdev));
3386 blocksize_mask = (1 << blkbits) - 1;
3387 if (align & blocksize_mask)
3388 return -EINVAL;
3389 return 1;
3390 }
3391 return 0;
3392 }
3393
3394 static void f2fs_dio_end_io(struct bio *bio)
3395 {
3396 struct f2fs_private_dio *dio = bio->bi_private;
3397
3398 dec_page_count(F2FS_I_SB(dio->inode),
3399 dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3400
3401 bio->bi_private = dio->orig_private;
3402 bio->bi_end_io = dio->orig_end_io;
3403
3404 kvfree(dio);
3405
3406 bio_endio(bio);
3407 }
3408
3409 static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
3410 loff_t file_offset)
3411 {
3412 struct f2fs_private_dio *dio;
3413 bool write = (bio_op(bio) == REQ_OP_WRITE);
3414
3415 dio = f2fs_kzalloc(F2FS_I_SB(inode),
3416 sizeof(struct f2fs_private_dio), GFP_NOFS);
3417 if (!dio)
3418 goto out;
3419
3420 dio->inode = inode;
3421 dio->orig_end_io = bio->bi_end_io;
3422 dio->orig_private = bio->bi_private;
3423 dio->write = write;
3424
3425 bio->bi_end_io = f2fs_dio_end_io;
3426 bio->bi_private = dio;
3427
3428 inc_page_count(F2FS_I_SB(inode),
3429 write ? F2FS_DIO_WRITE : F2FS_DIO_READ);
3430
3431 submit_bio(bio);
3432 return;
3433 out:
3434 bio->bi_status = BLK_STS_IOERR;
3435 bio_endio(bio);
3436 }
3437
3438 static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
3439 {
3440 struct address_space *mapping = iocb->ki_filp->f_mapping;
3441 struct inode *inode = mapping->host;
3442 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3443 struct f2fs_inode_info *fi = F2FS_I(inode);
3444 size_t count = iov_iter_count(iter);
3445 loff_t offset = iocb->ki_pos;
3446 int rw = iov_iter_rw(iter);
3447 int err;
3448 enum rw_hint hint = iocb->ki_hint;
3449 int whint_mode = F2FS_OPTION(sbi).whint_mode;
3450 bool do_opu;
3451
3452 err = check_direct_IO(inode, iter, offset);
3453 if (err)
3454 return err < 0 ? err : 0;
3455
3456 if (f2fs_force_buffered_io(inode, iocb, iter))
3457 return 0;
3458
3459 do_opu = allow_outplace_dio(inode, iocb, iter);
3460
3461 trace_f2fs_direct_IO_enter(inode, offset, count, rw);
3462
3463 if (rw == WRITE && whint_mode == WHINT_MODE_OFF)
3464 iocb->ki_hint = WRITE_LIFE_NOT_SET;
3465
3466 if (iocb->ki_flags & IOCB_NOWAIT) {
3467 if (!down_read_trylock(&fi->i_gc_rwsem[rw])) {
3468 iocb->ki_hint = hint;
3469 err = -EAGAIN;
3470 goto out;
3471 }
3472 if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) {
3473 up_read(&fi->i_gc_rwsem[rw]);
3474 iocb->ki_hint = hint;
3475 err = -EAGAIN;
3476 goto out;
3477 }
3478 } else {
3479 down_read(&fi->i_gc_rwsem[rw]);
3480 if (do_opu)
3481 down_read(&fi->i_gc_rwsem[READ]);
3482 }
3483
3484 err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev,
3485 iter, rw == WRITE ? get_data_block_dio_write :
3486 get_data_block_dio, NULL, f2fs_dio_submit_bio,
3487 rw == WRITE ? DIO_LOCKING | DIO_SKIP_HOLES :
3488 DIO_SKIP_HOLES);
3489
3490 if (do_opu)
3491 up_read(&fi->i_gc_rwsem[READ]);
3492
3493 up_read(&fi->i_gc_rwsem[rw]);
3494
3495 if (rw == WRITE) {
3496 if (whint_mode == WHINT_MODE_OFF)
3497 iocb->ki_hint = hint;
3498 if (err > 0) {
3499 f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO,
3500 err);
3501 if (!do_opu)
3502 set_inode_flag(inode, FI_UPDATE_WRITE);
3503 } else if (err < 0) {
3504 f2fs_write_failed(mapping, offset + count);
3505 }
3506 }
3507
3508 out:
3509 trace_f2fs_direct_IO_exit(inode, offset, count, rw, err);
3510
3511 return err;
3512 }
3513
3514 void f2fs_invalidate_page(struct page *page, unsigned int offset,
3515 unsigned int length)
3516 {
3517 struct inode *inode = page->mapping->host;
3518 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3519
3520 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
3521 (offset % PAGE_SIZE || length != PAGE_SIZE))
3522 return;
3523
3524 if (PageDirty(page)) {
3525 if (inode->i_ino == F2FS_META_INO(sbi)) {
3526 dec_page_count(sbi, F2FS_DIRTY_META);
3527 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
3528 dec_page_count(sbi, F2FS_DIRTY_NODES);
3529 } else {
3530 inode_dec_dirty_pages(inode);
3531 f2fs_remove_dirty_inode(inode);
3532 }
3533 }
3534
3535 clear_cold_data(page);
3536
3537 if (IS_ATOMIC_WRITTEN_PAGE(page))
3538 return f2fs_drop_inmem_page(inode, page);
3539
3540 f2fs_clear_page_private(page);
3541 }
3542
3543 int f2fs_release_page(struct page *page, gfp_t wait)
3544 {
3545 /* If this is dirty page, keep PagePrivate */
3546 if (PageDirty(page))
3547 return 0;
3548
3549 /* This is atomic written page, keep Private */
3550 if (IS_ATOMIC_WRITTEN_PAGE(page))
3551 return 0;
3552
3553 clear_cold_data(page);
3554 f2fs_clear_page_private(page);
3555 return 1;
3556 }
3557
3558 static int f2fs_set_data_page_dirty(struct page *page)
3559 {
3560 struct inode *inode = page_file_mapping(page)->host;
3561
3562 trace_f2fs_set_page_dirty(page, DATA);
3563
3564 if (!PageUptodate(page))
3565 SetPageUptodate(page);
3566 if (PageSwapCache(page))
3567 return __set_page_dirty_nobuffers(page);
3568
3569 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
3570 if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
3571 f2fs_register_inmem_page(inode, page);
3572 return 1;
3573 }
3574 /*
3575 * Previously, this page has been registered, we just
3576 * return here.
3577 */
3578 return 0;
3579 }
3580
3581 if (!PageDirty(page)) {
3582 __set_page_dirty_nobuffers(page);
3583 f2fs_update_dirty_page(inode, page);
3584 return 1;
3585 }
3586 return 0;
3587 }
3588
3589 static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3590 {
3591 struct inode *inode = mapping->host;
3592
3593 if (f2fs_has_inline_data(inode))
3594 return 0;
3595
3596 /* make sure allocating whole blocks */
3597 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3598 filemap_write_and_wait(mapping);
3599
3600 return generic_block_bmap(mapping, block, get_data_block_bmap);
3601 }
3602
3603 #ifdef CONFIG_MIGRATION
3604 #include <linux/migrate.h>
3605
3606 int f2fs_migrate_page(struct address_space *mapping,
3607 struct page *newpage, struct page *page, enum migrate_mode mode)
3608 {
3609 int rc, extra_count;
3610 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3611 bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page);
3612
3613 BUG_ON(PageWriteback(page));
3614
3615 /* migrating an atomic written page is safe with the inmem_lock hold */
3616 if (atomic_written) {
3617 if (mode != MIGRATE_SYNC)
3618 return -EBUSY;
3619 if (!mutex_trylock(&fi->inmem_lock))
3620 return -EAGAIN;
3621 }
3622
3623 /* one extra reference was held for atomic_write page */
3624 extra_count = atomic_written ? 1 : 0;
3625 rc = migrate_page_move_mapping(mapping, newpage,
3626 page, extra_count);
3627 if (rc != MIGRATEPAGE_SUCCESS) {
3628 if (atomic_written)
3629 mutex_unlock(&fi->inmem_lock);
3630 return rc;
3631 }
3632
3633 if (atomic_written) {
3634 struct inmem_pages *cur;
3635 list_for_each_entry(cur, &fi->inmem_pages, list)
3636 if (cur->page == page) {
3637 cur->page = newpage;
3638 break;
3639 }
3640 mutex_unlock(&fi->inmem_lock);
3641 put_page(page);
3642 get_page(newpage);
3643 }
3644
3645 if (PagePrivate(page)) {
3646 f2fs_set_page_private(newpage, page_private(page));
3647 f2fs_clear_page_private(page);
3648 }
3649
3650 if (mode != MIGRATE_SYNC_NO_COPY)
3651 migrate_page_copy(newpage, page);
3652 else
3653 migrate_page_states(newpage, page);
3654
3655 return MIGRATEPAGE_SUCCESS;
3656 }
3657 #endif
3658
3659 #ifdef CONFIG_SWAP
3660 /* Copied from generic_swapfile_activate() to check any holes */
3661 static int check_swap_activate(struct swap_info_struct *sis,
3662 struct file *swap_file, sector_t *span)
3663 {
3664 struct address_space *mapping = swap_file->f_mapping;
3665 struct inode *inode = mapping->host;
3666 unsigned blocks_per_page;
3667 unsigned long page_no;
3668 unsigned blkbits;
3669 sector_t probe_block;
3670 sector_t last_block;
3671 sector_t lowest_block = -1;
3672 sector_t highest_block = 0;
3673 int nr_extents = 0;
3674 int ret;
3675
3676 blkbits = inode->i_blkbits;
3677 blocks_per_page = PAGE_SIZE >> blkbits;
3678
3679 /*
3680 * Map all the blocks into the extent list. This code doesn't try
3681 * to be very smart.
3682 */
3683 probe_block = 0;
3684 page_no = 0;
3685 last_block = i_size_read(inode) >> blkbits;
3686 while ((probe_block + blocks_per_page) <= last_block &&
3687 page_no < sis->max) {
3688 unsigned block_in_page;
3689 sector_t first_block;
3690 sector_t block = 0;
3691 int err = 0;
3692
3693 cond_resched();
3694
3695 block = probe_block;
3696 err = bmap(inode, &block);
3697 if (err || !block)
3698 goto bad_bmap;
3699 first_block = block;
3700
3701 /*
3702 * It must be PAGE_SIZE aligned on-disk
3703 */
3704 if (first_block & (blocks_per_page - 1)) {
3705 probe_block++;
3706 goto reprobe;
3707 }
3708
3709 for (block_in_page = 1; block_in_page < blocks_per_page;
3710 block_in_page++) {
3711
3712 block = probe_block + block_in_page;
3713 err = bmap(inode, &block);
3714
3715 if (err || !block)
3716 goto bad_bmap;
3717
3718 if (block != first_block + block_in_page) {
3719 /* Discontiguity */
3720 probe_block++;
3721 goto reprobe;
3722 }
3723 }
3724
3725 first_block >>= (PAGE_SHIFT - blkbits);
3726 if (page_no) { /* exclude the header page */
3727 if (first_block < lowest_block)
3728 lowest_block = first_block;
3729 if (first_block > highest_block)
3730 highest_block = first_block;
3731 }
3732
3733 /*
3734 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3735 */
3736 ret = add_swap_extent(sis, page_no, 1, first_block);
3737 if (ret < 0)
3738 goto out;
3739 nr_extents += ret;
3740 page_no++;
3741 probe_block += blocks_per_page;
3742 reprobe:
3743 continue;
3744 }
3745 ret = nr_extents;
3746 *span = 1 + highest_block - lowest_block;
3747 if (page_no == 0)
3748 page_no = 1; /* force Empty message */
3749 sis->max = page_no;
3750 sis->pages = page_no - 1;
3751 sis->highest_bit = page_no - 1;
3752 out:
3753 return ret;
3754 bad_bmap:
3755 pr_err("swapon: swapfile has holes\n");
3756 return -EINVAL;
3757 }
3758
3759 static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3760 sector_t *span)
3761 {
3762 struct inode *inode = file_inode(file);
3763 int ret;
3764
3765 if (!S_ISREG(inode->i_mode))
3766 return -EINVAL;
3767
3768 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3769 return -EROFS;
3770
3771 ret = f2fs_convert_inline_inode(inode);
3772 if (ret)
3773 return ret;
3774
3775 if (f2fs_disable_compressed_file(inode))
3776 return -EINVAL;
3777
3778 ret = check_swap_activate(sis, file, span);
3779 if (ret < 0)
3780 return ret;
3781
3782 set_inode_flag(inode, FI_PIN_FILE);
3783 f2fs_precache_extents(inode);
3784 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3785 return ret;
3786 }
3787
3788 static void f2fs_swap_deactivate(struct file *file)
3789 {
3790 struct inode *inode = file_inode(file);
3791
3792 clear_inode_flag(inode, FI_PIN_FILE);
3793 }
3794 #else
3795 static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3796 sector_t *span)
3797 {
3798 return -EOPNOTSUPP;
3799 }
3800
3801 static void f2fs_swap_deactivate(struct file *file)
3802 {
3803 }
3804 #endif
3805
3806 const struct address_space_operations f2fs_dblock_aops = {
3807 .readpage = f2fs_read_data_page,
3808 .readpages = f2fs_read_data_pages,
3809 .writepage = f2fs_write_data_page,
3810 .writepages = f2fs_write_data_pages,
3811 .write_begin = f2fs_write_begin,
3812 .write_end = f2fs_write_end,
3813 .set_page_dirty = f2fs_set_data_page_dirty,
3814 .invalidatepage = f2fs_invalidate_page,
3815 .releasepage = f2fs_release_page,
3816 .direct_IO = f2fs_direct_IO,
3817 .bmap = f2fs_bmap,
3818 .swap_activate = f2fs_swap_activate,
3819 .swap_deactivate = f2fs_swap_deactivate,
3820 #ifdef CONFIG_MIGRATION
3821 .migratepage = f2fs_migrate_page,
3822 #endif
3823 };
3824
3825 void f2fs_clear_page_cache_dirty_tag(struct page *page)
3826 {
3827 struct address_space *mapping = page_mapping(page);
3828 unsigned long flags;
3829
3830 xa_lock_irqsave(&mapping->i_pages, flags);
3831 __xa_clear_mark(&mapping->i_pages, page_index(page),
3832 PAGECACHE_TAG_DIRTY);
3833 xa_unlock_irqrestore(&mapping->i_pages, flags);
3834 }
3835
3836 int __init f2fs_init_post_read_processing(void)
3837 {
3838 bio_post_read_ctx_cache =
3839 kmem_cache_create("f2fs_bio_post_read_ctx",
3840 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
3841 if (!bio_post_read_ctx_cache)
3842 goto fail;
3843 bio_post_read_ctx_pool =
3844 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3845 bio_post_read_ctx_cache);
3846 if (!bio_post_read_ctx_pool)
3847 goto fail_free_cache;
3848 return 0;
3849
3850 fail_free_cache:
3851 kmem_cache_destroy(bio_post_read_ctx_cache);
3852 fail:
3853 return -ENOMEM;
3854 }
3855
3856 void f2fs_destroy_post_read_processing(void)
3857 {
3858 mempool_destroy(bio_post_read_ctx_pool);
3859 kmem_cache_destroy(bio_post_read_ctx_cache);
3860 }
3861
3862 int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
3863 {
3864 if (!f2fs_sb_has_encrypt(sbi) &&
3865 !f2fs_sb_has_verity(sbi) &&
3866 !f2fs_sb_has_compression(sbi))
3867 return 0;
3868
3869 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
3870 WQ_UNBOUND | WQ_HIGHPRI,
3871 num_online_cpus());
3872 if (!sbi->post_read_wq)
3873 return -ENOMEM;
3874 return 0;
3875 }
3876
3877 void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
3878 {
3879 if (sbi->post_read_wq)
3880 destroy_workqueue(sbi->post_read_wq);
3881 }
3882
3883 int __init f2fs_init_bio_entry_cache(void)
3884 {
3885 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
3886 sizeof(struct bio_entry));
3887 if (!bio_entry_slab)
3888 return -ENOMEM;
3889 return 0;
3890 }
3891
3892 void f2fs_destroy_bio_entry_cache(void)
3893 {
3894 kmem_cache_destroy(bio_entry_slab);
3895 }
Linux with added FPC-III support