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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/sched/mm.h>
12#include <linux/mpage.h>
13#include <linux/writeback.h>
14#include <linux/pagevec.h>
15#include <linux/blkdev.h>
16#include <linux/bio.h>
17#include <linux/blk-crypto.h>
18#include <linux/swap.h>
19#include <linux/prefetch.h>
20#include <linux/uio.h>
21#include <linux/sched/signal.h>
22#include <linux/fiemap.h>
23#include <linux/iomap.h>
24
25#include "f2fs.h"
26#include "node.h"
27#include "segment.h"
28#include "iostat.h"
29#include <trace/events/f2fs.h>
30
31#define NUM_PREALLOC_POST_READ_CTXS 128
32
33static struct kmem_cache *bio_post_read_ctx_cache;
34static struct kmem_cache *bio_entry_slab;
35static mempool_t *bio_post_read_ctx_pool;
36static struct bio_set f2fs_bioset;
37
38#define F2FS_BIO_POOL_SIZE NR_CURSEG_TYPE
39
40int __init f2fs_init_bioset(void)
41{
42 if (bioset_init(&f2fs_bioset, F2FS_BIO_POOL_SIZE,
43 0, BIOSET_NEED_BVECS))
44 return -ENOMEM;
45 return 0;
46}
47
48void f2fs_destroy_bioset(void)
49{
50 bioset_exit(&f2fs_bioset);
51}
52
53static bool __is_cp_guaranteed(struct page *page)
54{
55 struct address_space *mapping = page->mapping;
56 struct inode *inode;
57 struct f2fs_sb_info *sbi;
58
59 if (!mapping)
60 return false;
61
62 inode = mapping->host;
63 sbi = F2FS_I_SB(inode);
64
65 if (inode->i_ino == F2FS_META_INO(sbi) ||
66 inode->i_ino == F2FS_NODE_INO(sbi) ||
67 S_ISDIR(inode->i_mode))
68 return true;
69
70 if (f2fs_is_compressed_page(page))
71 return false;
72 if ((S_ISREG(inode->i_mode) &&
73 (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) ||
74 page_private_gcing(page))
75 return true;
76 return false;
77}
78
79static enum count_type __read_io_type(struct page *page)
80{
81 struct address_space *mapping = page_file_mapping(page);
82
83 if (mapping) {
84 struct inode *inode = mapping->host;
85 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
86
87 if (inode->i_ino == F2FS_META_INO(sbi))
88 return F2FS_RD_META;
89
90 if (inode->i_ino == F2FS_NODE_INO(sbi))
91 return F2FS_RD_NODE;
92 }
93 return F2FS_RD_DATA;
94}
95
96/* postprocessing steps for read bios */
97enum bio_post_read_step {
98#ifdef CONFIG_FS_ENCRYPTION
99 STEP_DECRYPT = 1 << 0,
100#else
101 STEP_DECRYPT = 0, /* compile out the decryption-related code */
102#endif
103#ifdef CONFIG_F2FS_FS_COMPRESSION
104 STEP_DECOMPRESS = 1 << 1,
105#else
106 STEP_DECOMPRESS = 0, /* compile out the decompression-related code */
107#endif
108#ifdef CONFIG_FS_VERITY
109 STEP_VERITY = 1 << 2,
110#else
111 STEP_VERITY = 0, /* compile out the verity-related code */
112#endif
113};
114
115struct bio_post_read_ctx {
116 struct bio *bio;
117 struct f2fs_sb_info *sbi;
118 struct work_struct work;
119 unsigned int enabled_steps;
120 block_t fs_blkaddr;
121};
122
123static void f2fs_finish_read_bio(struct bio *bio)
124{
125 struct bio_vec *bv;
126 struct bvec_iter_all iter_all;
127
128 /*
129 * Update and unlock the bio's pagecache pages, and put the
130 * decompression context for any compressed pages.
131 */
132 bio_for_each_segment_all(bv, bio, iter_all) {
133 struct page *page = bv->bv_page;
134
135 if (f2fs_is_compressed_page(page)) {
136 if (bio->bi_status)
137 f2fs_end_read_compressed_page(page, true, 0);
138 f2fs_put_page_dic(page);
139 continue;
140 }
141
142 /* PG_error was set if decryption or verity failed. */
143 if (bio->bi_status || PageError(page)) {
144 ClearPageUptodate(page);
145 /* will re-read again later */
146 ClearPageError(page);
147 } else {
148 SetPageUptodate(page);
149 }
150 dec_page_count(F2FS_P_SB(page), __read_io_type(page));
151 unlock_page(page);
152 }
153
154 if (bio->bi_private)
155 mempool_free(bio->bi_private, bio_post_read_ctx_pool);
156 bio_put(bio);
157}
158
159static void f2fs_verify_bio(struct work_struct *work)
160{
161 struct bio_post_read_ctx *ctx =
162 container_of(work, struct bio_post_read_ctx, work);
163 struct bio *bio = ctx->bio;
164 bool may_have_compressed_pages = (ctx->enabled_steps & STEP_DECOMPRESS);
165
166 /*
167 * fsverity_verify_bio() may call readpages() again, and while verity
168 * will be disabled for this, decryption and/or decompression may still
169 * be needed, resulting in another bio_post_read_ctx being allocated.
170 * So to prevent deadlocks we need to release the current ctx to the
171 * mempool first. This assumes that verity is the last post-read step.
172 */
173 mempool_free(ctx, bio_post_read_ctx_pool);
174 bio->bi_private = NULL;
175
176 /*
177 * Verify the bio's pages with fs-verity. Exclude compressed pages,
178 * as those were handled separately by f2fs_end_read_compressed_page().
179 */
180 if (may_have_compressed_pages) {
181 struct bio_vec *bv;
182 struct bvec_iter_all iter_all;
183
184 bio_for_each_segment_all(bv, bio, iter_all) {
185 struct page *page = bv->bv_page;
186
187 if (!f2fs_is_compressed_page(page) &&
188 !PageError(page) && !fsverity_verify_page(page))
189 SetPageError(page);
190 }
191 } else {
192 fsverity_verify_bio(bio);
193 }
194
195 f2fs_finish_read_bio(bio);
196}
197
198/*
199 * If the bio's data needs to be verified with fs-verity, then enqueue the
200 * verity work for the bio. Otherwise finish the bio now.
201 *
202 * Note that to avoid deadlocks, the verity work can't be done on the
203 * decryption/decompression workqueue. This is because verifying the data pages
204 * can involve reading verity metadata pages from the file, and these verity
205 * metadata pages may be encrypted and/or compressed.
206 */
207static void f2fs_verify_and_finish_bio(struct bio *bio)
208{
209 struct bio_post_read_ctx *ctx = bio->bi_private;
210
211 if (ctx && (ctx->enabled_steps & STEP_VERITY)) {
212 INIT_WORK(&ctx->work, f2fs_verify_bio);
213 fsverity_enqueue_verify_work(&ctx->work);
214 } else {
215 f2fs_finish_read_bio(bio);
216 }
217}
218
219/*
220 * Handle STEP_DECOMPRESS by decompressing any compressed clusters whose last
221 * remaining page was read by @ctx->bio.
222 *
223 * Note that a bio may span clusters (even a mix of compressed and uncompressed
224 * clusters) or be for just part of a cluster. STEP_DECOMPRESS just indicates
225 * that the bio includes at least one compressed page. The actual decompression
226 * is done on a per-cluster basis, not a per-bio basis.
227 */
228static void f2fs_handle_step_decompress(struct bio_post_read_ctx *ctx)
229{
230 struct bio_vec *bv;
231 struct bvec_iter_all iter_all;
232 bool all_compressed = true;
233 block_t blkaddr = ctx->fs_blkaddr;
234
235 bio_for_each_segment_all(bv, ctx->bio, iter_all) {
236 struct page *page = bv->bv_page;
237
238 /* PG_error was set if decryption failed. */
239 if (f2fs_is_compressed_page(page))
240 f2fs_end_read_compressed_page(page, PageError(page),
241 blkaddr);
242 else
243 all_compressed = false;
244
245 blkaddr++;
246 }
247
248 /*
249 * Optimization: if all the bio's pages are compressed, then scheduling
250 * the per-bio verity work is unnecessary, as verity will be fully
251 * handled at the compression cluster level.
252 */
253 if (all_compressed)
254 ctx->enabled_steps &= ~STEP_VERITY;
255}
256
257static void f2fs_post_read_work(struct work_struct *work)
258{
259 struct bio_post_read_ctx *ctx =
260 container_of(work, struct bio_post_read_ctx, work);
261
262 if (ctx->enabled_steps & STEP_DECRYPT)
263 fscrypt_decrypt_bio(ctx->bio);
264
265 if (ctx->enabled_steps & STEP_DECOMPRESS)
266 f2fs_handle_step_decompress(ctx);
267
268 f2fs_verify_and_finish_bio(ctx->bio);
269}
270
271static void f2fs_read_end_io(struct bio *bio)
272{
273 struct f2fs_sb_info *sbi = F2FS_P_SB(bio_first_page_all(bio));
274 struct bio_post_read_ctx *ctx;
275
276 iostat_update_and_unbind_ctx(bio, 0);
277 ctx = bio->bi_private;
278
279 if (time_to_inject(sbi, FAULT_READ_IO)) {
280 f2fs_show_injection_info(sbi, FAULT_READ_IO);
281 bio->bi_status = BLK_STS_IOERR;
282 }
283
284 if (bio->bi_status) {
285 f2fs_finish_read_bio(bio);
286 return;
287 }
288
289 if (ctx && (ctx->enabled_steps & (STEP_DECRYPT | STEP_DECOMPRESS))) {
290 INIT_WORK(&ctx->work, f2fs_post_read_work);
291 queue_work(ctx->sbi->post_read_wq, &ctx->work);
292 } else {
293 f2fs_verify_and_finish_bio(bio);
294 }
295}
296
297static void f2fs_write_end_io(struct bio *bio)
298{
299 struct f2fs_sb_info *sbi;
300 struct bio_vec *bvec;
301 struct bvec_iter_all iter_all;
302
303 iostat_update_and_unbind_ctx(bio, 1);
304 sbi = bio->bi_private;
305
306 if (time_to_inject(sbi, FAULT_WRITE_IO)) {
307 f2fs_show_injection_info(sbi, FAULT_WRITE_IO);
308 bio->bi_status = BLK_STS_IOERR;
309 }
310
311 bio_for_each_segment_all(bvec, bio, iter_all) {
312 struct page *page = bvec->bv_page;
313 enum count_type type = WB_DATA_TYPE(page);
314
315 if (page_private_dummy(page)) {
316 clear_page_private_dummy(page);
317 unlock_page(page);
318 mempool_free(page, sbi->write_io_dummy);
319
320 if (unlikely(bio->bi_status))
321 f2fs_stop_checkpoint(sbi, true);
322 continue;
323 }
324
325 fscrypt_finalize_bounce_page(&page);
326
327#ifdef CONFIG_F2FS_FS_COMPRESSION
328 if (f2fs_is_compressed_page(page)) {
329 f2fs_compress_write_end_io(bio, page);
330 continue;
331 }
332#endif
333
334 if (unlikely(bio->bi_status)) {
335 mapping_set_error(page->mapping, -EIO);
336 if (type == F2FS_WB_CP_DATA)
337 f2fs_stop_checkpoint(sbi, true);
338 }
339
340 f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) &&
341 page->index != nid_of_node(page));
342
343 dec_page_count(sbi, type);
344 if (f2fs_in_warm_node_list(sbi, page))
345 f2fs_del_fsync_node_entry(sbi, page);
346 clear_page_private_gcing(page);
347 end_page_writeback(page);
348 }
349 if (!get_pages(sbi, F2FS_WB_CP_DATA) &&
350 wq_has_sleeper(&sbi->cp_wait))
351 wake_up(&sbi->cp_wait);
352
353 bio_put(bio);
354}
355
356struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
357 block_t blk_addr, struct bio *bio)
358{
359 struct block_device *bdev = sbi->sb->s_bdev;
360 int i;
361
362 if (f2fs_is_multi_device(sbi)) {
363 for (i = 0; i < sbi->s_ndevs; i++) {
364 if (FDEV(i).start_blk <= blk_addr &&
365 FDEV(i).end_blk >= blk_addr) {
366 blk_addr -= FDEV(i).start_blk;
367 bdev = FDEV(i).bdev;
368 break;
369 }
370 }
371 }
372 if (bio) {
373 bio_set_dev(bio, bdev);
374 bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr);
375 }
376 return bdev;
377}
378
379int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
380{
381 int i;
382
383 if (!f2fs_is_multi_device(sbi))
384 return 0;
385
386 for (i = 0; i < sbi->s_ndevs; i++)
387 if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
388 return i;
389 return 0;
390}
391
392static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages)
393{
394 struct f2fs_sb_info *sbi = fio->sbi;
395 struct bio *bio;
396
397 bio = bio_alloc_bioset(GFP_NOIO, npages, &f2fs_bioset);
398
399 f2fs_target_device(sbi, fio->new_blkaddr, bio);
400 if (is_read_io(fio->op)) {
401 bio->bi_end_io = f2fs_read_end_io;
402 bio->bi_private = NULL;
403 } else {
404 bio->bi_end_io = f2fs_write_end_io;
405 bio->bi_private = sbi;
406 bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi,
407 fio->type, fio->temp);
408 }
409 iostat_alloc_and_bind_ctx(sbi, bio, NULL);
410
411 if (fio->io_wbc)
412 wbc_init_bio(fio->io_wbc, bio);
413
414 return bio;
415}
416
417static void f2fs_set_bio_crypt_ctx(struct bio *bio, const struct inode *inode,
418 pgoff_t first_idx,
419 const struct f2fs_io_info *fio,
420 gfp_t gfp_mask)
421{
422 /*
423 * The f2fs garbage collector sets ->encrypted_page when it wants to
424 * read/write raw data without encryption.
425 */
426 if (!fio || !fio->encrypted_page)
427 fscrypt_set_bio_crypt_ctx(bio, inode, first_idx, gfp_mask);
428}
429
430static bool f2fs_crypt_mergeable_bio(struct bio *bio, const struct inode *inode,
431 pgoff_t next_idx,
432 const struct f2fs_io_info *fio)
433{
434 /*
435 * The f2fs garbage collector sets ->encrypted_page when it wants to
436 * read/write raw data without encryption.
437 */
438 if (fio && fio->encrypted_page)
439 return !bio_has_crypt_ctx(bio);
440
441 return fscrypt_mergeable_bio(bio, inode, next_idx);
442}
443
444static inline void __submit_bio(struct f2fs_sb_info *sbi,
445 struct bio *bio, enum page_type type)
446{
447 if (!is_read_io(bio_op(bio))) {
448 unsigned int start;
449
450 if (type != DATA && type != NODE)
451 goto submit_io;
452
453 if (f2fs_lfs_mode(sbi) && current->plug)
454 blk_finish_plug(current->plug);
455
456 if (!F2FS_IO_ALIGNED(sbi))
457 goto submit_io;
458
459 start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS;
460 start %= F2FS_IO_SIZE(sbi);
461
462 if (start == 0)
463 goto submit_io;
464
465 /* fill dummy pages */
466 for (; start < F2FS_IO_SIZE(sbi); start++) {
467 struct page *page =
468 mempool_alloc(sbi->write_io_dummy,
469 GFP_NOIO | __GFP_NOFAIL);
470 f2fs_bug_on(sbi, !page);
471
472 lock_page(page);
473
474 zero_user_segment(page, 0, PAGE_SIZE);
475 set_page_private_dummy(page);
476
477 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE)
478 f2fs_bug_on(sbi, 1);
479 }
480 /*
481 * In the NODE case, we lose next block address chain. So, we
482 * need to do checkpoint in f2fs_sync_file.
483 */
484 if (type == NODE)
485 set_sbi_flag(sbi, SBI_NEED_CP);
486 }
487submit_io:
488 if (is_read_io(bio_op(bio)))
489 trace_f2fs_submit_read_bio(sbi->sb, type, bio);
490 else
491 trace_f2fs_submit_write_bio(sbi->sb, type, bio);
492
493 iostat_update_submit_ctx(bio, type);
494 submit_bio(bio);
495}
496
497void f2fs_submit_bio(struct f2fs_sb_info *sbi,
498 struct bio *bio, enum page_type type)
499{
500 __submit_bio(sbi, bio, type);
501}
502
503static void __attach_io_flag(struct f2fs_io_info *fio)
504{
505 struct f2fs_sb_info *sbi = fio->sbi;
506 unsigned int temp_mask = (1 << NR_TEMP_TYPE) - 1;
507 unsigned int io_flag, fua_flag, meta_flag;
508
509 if (fio->type == DATA)
510 io_flag = sbi->data_io_flag;
511 else if (fio->type == NODE)
512 io_flag = sbi->node_io_flag;
513 else
514 return;
515
516 fua_flag = io_flag & temp_mask;
517 meta_flag = (io_flag >> NR_TEMP_TYPE) & temp_mask;
518
519 /*
520 * data/node io flag bits per temp:
521 * REQ_META | REQ_FUA |
522 * 5 | 4 | 3 | 2 | 1 | 0 |
523 * Cold | Warm | Hot | Cold | Warm | Hot |
524 */
525 if ((1 << fio->temp) & meta_flag)
526 fio->op_flags |= REQ_META;
527 if ((1 << fio->temp) & fua_flag)
528 fio->op_flags |= REQ_FUA;
529}
530
531static void __submit_merged_bio(struct f2fs_bio_info *io)
532{
533 struct f2fs_io_info *fio = &io->fio;
534
535 if (!io->bio)
536 return;
537
538 __attach_io_flag(fio);
539 bio_set_op_attrs(io->bio, fio->op, fio->op_flags);
540
541 if (is_read_io(fio->op))
542 trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio);
543 else
544 trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio);
545
546 __submit_bio(io->sbi, io->bio, fio->type);
547 io->bio = NULL;
548}
549
550static bool __has_merged_page(struct bio *bio, struct inode *inode,
551 struct page *page, nid_t ino)
552{
553 struct bio_vec *bvec;
554 struct bvec_iter_all iter_all;
555
556 if (!bio)
557 return false;
558
559 if (!inode && !page && !ino)
560 return true;
561
562 bio_for_each_segment_all(bvec, bio, iter_all) {
563 struct page *target = bvec->bv_page;
564
565 if (fscrypt_is_bounce_page(target)) {
566 target = fscrypt_pagecache_page(target);
567 if (IS_ERR(target))
568 continue;
569 }
570 if (f2fs_is_compressed_page(target)) {
571 target = f2fs_compress_control_page(target);
572 if (IS_ERR(target))
573 continue;
574 }
575
576 if (inode && inode == target->mapping->host)
577 return true;
578 if (page && page == target)
579 return true;
580 if (ino && ino == ino_of_node(target))
581 return true;
582 }
583
584 return false;
585}
586
587static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi,
588 enum page_type type, enum temp_type temp)
589{
590 enum page_type btype = PAGE_TYPE_OF_BIO(type);
591 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
592
593 down_write(&io->io_rwsem);
594
595 /* change META to META_FLUSH in the checkpoint procedure */
596 if (type >= META_FLUSH) {
597 io->fio.type = META_FLUSH;
598 io->fio.op = REQ_OP_WRITE;
599 io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC;
600 if (!test_opt(sbi, NOBARRIER))
601 io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA;
602 }
603 __submit_merged_bio(io);
604 up_write(&io->io_rwsem);
605}
606
607static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
608 struct inode *inode, struct page *page,
609 nid_t ino, enum page_type type, bool force)
610{
611 enum temp_type temp;
612 bool ret = true;
613
614 for (temp = HOT; temp < NR_TEMP_TYPE; temp++) {
615 if (!force) {
616 enum page_type btype = PAGE_TYPE_OF_BIO(type);
617 struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
618
619 down_read(&io->io_rwsem);
620 ret = __has_merged_page(io->bio, inode, page, ino);
621 up_read(&io->io_rwsem);
622 }
623 if (ret)
624 __f2fs_submit_merged_write(sbi, type, temp);
625
626 /* TODO: use HOT temp only for meta pages now. */
627 if (type >= META)
628 break;
629 }
630}
631
632void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
633{
634 __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
635}
636
637void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
638 struct inode *inode, struct page *page,
639 nid_t ino, enum page_type type)
640{
641 __submit_merged_write_cond(sbi, inode, page, ino, type, false);
642}
643
644void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi)
645{
646 f2fs_submit_merged_write(sbi, DATA);
647 f2fs_submit_merged_write(sbi, NODE);
648 f2fs_submit_merged_write(sbi, META);
649}
650
651/*
652 * Fill the locked page with data located in the block address.
653 * A caller needs to unlock the page on failure.
654 */
655int f2fs_submit_page_bio(struct f2fs_io_info *fio)
656{
657 struct bio *bio;
658 struct page *page = fio->encrypted_page ?
659 fio->encrypted_page : fio->page;
660
661 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
662 fio->is_por ? META_POR : (__is_meta_io(fio) ?
663 META_GENERIC : DATA_GENERIC_ENHANCE)))
664 return -EFSCORRUPTED;
665
666 trace_f2fs_submit_page_bio(page, fio);
667
668 /* Allocate a new bio */
669 bio = __bio_alloc(fio, 1);
670
671 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
672 fio->page->index, fio, GFP_NOIO);
673
674 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
675 bio_put(bio);
676 return -EFAULT;
677 }
678
679 if (fio->io_wbc && !is_read_io(fio->op))
680 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
681
682 __attach_io_flag(fio);
683 bio_set_op_attrs(bio, fio->op, fio->op_flags);
684
685 inc_page_count(fio->sbi, is_read_io(fio->op) ?
686 __read_io_type(page): WB_DATA_TYPE(fio->page));
687
688 __submit_bio(fio->sbi, bio, fio->type);
689 return 0;
690}
691
692static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
693 block_t last_blkaddr, block_t cur_blkaddr)
694{
695 if (unlikely(sbi->max_io_bytes &&
696 bio->bi_iter.bi_size >= sbi->max_io_bytes))
697 return false;
698 if (last_blkaddr + 1 != cur_blkaddr)
699 return false;
700 return bio->bi_bdev == f2fs_target_device(sbi, cur_blkaddr, NULL);
701}
702
703static bool io_type_is_mergeable(struct f2fs_bio_info *io,
704 struct f2fs_io_info *fio)
705{
706 if (io->fio.op != fio->op)
707 return false;
708 return io->fio.op_flags == fio->op_flags;
709}
710
711static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio,
712 struct f2fs_bio_info *io,
713 struct f2fs_io_info *fio,
714 block_t last_blkaddr,
715 block_t cur_blkaddr)
716{
717 if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) {
718 unsigned int filled_blocks =
719 F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size);
720 unsigned int io_size = F2FS_IO_SIZE(sbi);
721 unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt;
722
723 /* IOs in bio is aligned and left space of vectors is not enough */
724 if (!(filled_blocks % io_size) && left_vecs < io_size)
725 return false;
726 }
727 if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr))
728 return false;
729 return io_type_is_mergeable(io, fio);
730}
731
732static void add_bio_entry(struct f2fs_sb_info *sbi, struct bio *bio,
733 struct page *page, enum temp_type temp)
734{
735 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
736 struct bio_entry *be;
737
738 be = f2fs_kmem_cache_alloc(bio_entry_slab, GFP_NOFS, true, NULL);
739 be->bio = bio;
740 bio_get(bio);
741
742 if (bio_add_page(bio, page, PAGE_SIZE, 0) != PAGE_SIZE)
743 f2fs_bug_on(sbi, 1);
744
745 down_write(&io->bio_list_lock);
746 list_add_tail(&be->list, &io->bio_list);
747 up_write(&io->bio_list_lock);
748}
749
750static void del_bio_entry(struct bio_entry *be)
751{
752 list_del(&be->list);
753 kmem_cache_free(bio_entry_slab, be);
754}
755
756static int add_ipu_page(struct f2fs_io_info *fio, struct bio **bio,
757 struct page *page)
758{
759 struct f2fs_sb_info *sbi = fio->sbi;
760 enum temp_type temp;
761 bool found = false;
762 int ret = -EAGAIN;
763
764 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
765 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
766 struct list_head *head = &io->bio_list;
767 struct bio_entry *be;
768
769 down_write(&io->bio_list_lock);
770 list_for_each_entry(be, head, list) {
771 if (be->bio != *bio)
772 continue;
773
774 found = true;
775
776 f2fs_bug_on(sbi, !page_is_mergeable(sbi, *bio,
777 *fio->last_block,
778 fio->new_blkaddr));
779 if (f2fs_crypt_mergeable_bio(*bio,
780 fio->page->mapping->host,
781 fio->page->index, fio) &&
782 bio_add_page(*bio, page, PAGE_SIZE, 0) ==
783 PAGE_SIZE) {
784 ret = 0;
785 break;
786 }
787
788 /* page can't be merged into bio; submit the bio */
789 del_bio_entry(be);
790 __submit_bio(sbi, *bio, DATA);
791 break;
792 }
793 up_write(&io->bio_list_lock);
794 }
795
796 if (ret) {
797 bio_put(*bio);
798 *bio = NULL;
799 }
800
801 return ret;
802}
803
804void f2fs_submit_merged_ipu_write(struct f2fs_sb_info *sbi,
805 struct bio **bio, struct page *page)
806{
807 enum temp_type temp;
808 bool found = false;
809 struct bio *target = bio ? *bio : NULL;
810
811 for (temp = HOT; temp < NR_TEMP_TYPE && !found; temp++) {
812 struct f2fs_bio_info *io = sbi->write_io[DATA] + temp;
813 struct list_head *head = &io->bio_list;
814 struct bio_entry *be;
815
816 if (list_empty(head))
817 continue;
818
819 down_read(&io->bio_list_lock);
820 list_for_each_entry(be, head, list) {
821 if (target)
822 found = (target == be->bio);
823 else
824 found = __has_merged_page(be->bio, NULL,
825 page, 0);
826 if (found)
827 break;
828 }
829 up_read(&io->bio_list_lock);
830
831 if (!found)
832 continue;
833
834 found = false;
835
836 down_write(&io->bio_list_lock);
837 list_for_each_entry(be, head, list) {
838 if (target)
839 found = (target == be->bio);
840 else
841 found = __has_merged_page(be->bio, NULL,
842 page, 0);
843 if (found) {
844 target = be->bio;
845 del_bio_entry(be);
846 break;
847 }
848 }
849 up_write(&io->bio_list_lock);
850 }
851
852 if (found)
853 __submit_bio(sbi, target, DATA);
854 if (bio && *bio) {
855 bio_put(*bio);
856 *bio = NULL;
857 }
858}
859
860int f2fs_merge_page_bio(struct f2fs_io_info *fio)
861{
862 struct bio *bio = *fio->bio;
863 struct page *page = fio->encrypted_page ?
864 fio->encrypted_page : fio->page;
865
866 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
867 __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
868 return -EFSCORRUPTED;
869
870 trace_f2fs_submit_page_bio(page, fio);
871
872 if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block,
873 fio->new_blkaddr))
874 f2fs_submit_merged_ipu_write(fio->sbi, &bio, NULL);
875alloc_new:
876 if (!bio) {
877 bio = __bio_alloc(fio, BIO_MAX_VECS);
878 __attach_io_flag(fio);
879 f2fs_set_bio_crypt_ctx(bio, fio->page->mapping->host,
880 fio->page->index, fio, GFP_NOIO);
881 bio_set_op_attrs(bio, fio->op, fio->op_flags);
882
883 add_bio_entry(fio->sbi, bio, page, fio->temp);
884 } else {
885 if (add_ipu_page(fio, &bio, page))
886 goto alloc_new;
887 }
888
889 if (fio->io_wbc)
890 wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE);
891
892 inc_page_count(fio->sbi, WB_DATA_TYPE(page));
893
894 *fio->last_block = fio->new_blkaddr;
895 *fio->bio = bio;
896
897 return 0;
898}
899
900void f2fs_submit_page_write(struct f2fs_io_info *fio)
901{
902 struct f2fs_sb_info *sbi = fio->sbi;
903 enum page_type btype = PAGE_TYPE_OF_BIO(fio->type);
904 struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp;
905 struct page *bio_page;
906
907 f2fs_bug_on(sbi, is_read_io(fio->op));
908
909 down_write(&io->io_rwsem);
910next:
911 if (fio->in_list) {
912 spin_lock(&io->io_lock);
913 if (list_empty(&io->io_list)) {
914 spin_unlock(&io->io_lock);
915 goto out;
916 }
917 fio = list_first_entry(&io->io_list,
918 struct f2fs_io_info, list);
919 list_del(&fio->list);
920 spin_unlock(&io->io_lock);
921 }
922
923 verify_fio_blkaddr(fio);
924
925 if (fio->encrypted_page)
926 bio_page = fio->encrypted_page;
927 else if (fio->compressed_page)
928 bio_page = fio->compressed_page;
929 else
930 bio_page = fio->page;
931
932 /* set submitted = true as a return value */
933 fio->submitted = true;
934
935 inc_page_count(sbi, WB_DATA_TYPE(bio_page));
936
937 if (io->bio &&
938 (!io_is_mergeable(sbi, io->bio, io, fio, io->last_block_in_bio,
939 fio->new_blkaddr) ||
940 !f2fs_crypt_mergeable_bio(io->bio, fio->page->mapping->host,
941 bio_page->index, fio)))
942 __submit_merged_bio(io);
943alloc_new:
944 if (io->bio == NULL) {
945 if (F2FS_IO_ALIGNED(sbi) &&
946 (fio->type == DATA || fio->type == NODE) &&
947 fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) {
948 dec_page_count(sbi, WB_DATA_TYPE(bio_page));
949 fio->retry = true;
950 goto skip;
951 }
952 io->bio = __bio_alloc(fio, BIO_MAX_VECS);
953 f2fs_set_bio_crypt_ctx(io->bio, fio->page->mapping->host,
954 bio_page->index, fio, GFP_NOIO);
955 io->fio = *fio;
956 }
957
958 if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) {
959 __submit_merged_bio(io);
960 goto alloc_new;
961 }
962
963 if (fio->io_wbc)
964 wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE);
965
966 io->last_block_in_bio = fio->new_blkaddr;
967
968 trace_f2fs_submit_page_write(fio->page, fio);
969skip:
970 if (fio->in_list)
971 goto next;
972out:
973 if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
974 !f2fs_is_checkpoint_ready(sbi))
975 __submit_merged_bio(io);
976 up_write(&io->io_rwsem);
977}
978
979static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
980 unsigned nr_pages, unsigned op_flag,
981 pgoff_t first_idx, bool for_write)
982{
983 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
984 struct bio *bio;
985 struct bio_post_read_ctx *ctx = NULL;
986 unsigned int post_read_steps = 0;
987
988 bio = bio_alloc_bioset(for_write ? GFP_NOIO : GFP_KERNEL,
989 bio_max_segs(nr_pages), &f2fs_bioset);
990 if (!bio)
991 return ERR_PTR(-ENOMEM);
992
993 f2fs_set_bio_crypt_ctx(bio, inode, first_idx, NULL, GFP_NOFS);
994
995 f2fs_target_device(sbi, blkaddr, bio);
996 bio->bi_end_io = f2fs_read_end_io;
997 bio_set_op_attrs(bio, REQ_OP_READ, op_flag);
998
999 if (fscrypt_inode_uses_fs_layer_crypto(inode))
1000 post_read_steps |= STEP_DECRYPT;
1001
1002 if (f2fs_need_verity(inode, first_idx))
1003 post_read_steps |= STEP_VERITY;
1004
1005 /*
1006 * STEP_DECOMPRESS is handled specially, since a compressed file might
1007 * contain both compressed and uncompressed clusters. We'll allocate a
1008 * bio_post_read_ctx if the file is compressed, but the caller is
1009 * responsible for enabling STEP_DECOMPRESS if it's actually needed.
1010 */
1011
1012 if (post_read_steps || f2fs_compressed_file(inode)) {
1013 /* Due to the mempool, this never fails. */
1014 ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS);
1015 ctx->bio = bio;
1016 ctx->sbi = sbi;
1017 ctx->enabled_steps = post_read_steps;
1018 ctx->fs_blkaddr = blkaddr;
1019 bio->bi_private = ctx;
1020 }
1021 iostat_alloc_and_bind_ctx(sbi, bio, ctx);
1022
1023 return bio;
1024}
1025
1026/* This can handle encryption stuffs */
1027static int f2fs_submit_page_read(struct inode *inode, struct page *page,
1028 block_t blkaddr, int op_flags, bool for_write)
1029{
1030 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1031 struct bio *bio;
1032
1033 bio = f2fs_grab_read_bio(inode, blkaddr, 1, op_flags,
1034 page->index, for_write);
1035 if (IS_ERR(bio))
1036 return PTR_ERR(bio);
1037
1038 /* wait for GCed page writeback via META_MAPPING */
1039 f2fs_wait_on_block_writeback(inode, blkaddr);
1040
1041 if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
1042 bio_put(bio);
1043 return -EFAULT;
1044 }
1045 ClearPageError(page);
1046 inc_page_count(sbi, F2FS_RD_DATA);
1047 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
1048 __submit_bio(sbi, bio, DATA);
1049 return 0;
1050}
1051
1052static void __set_data_blkaddr(struct dnode_of_data *dn)
1053{
1054 struct f2fs_node *rn = F2FS_NODE(dn->node_page);
1055 __le32 *addr_array;
1056 int base = 0;
1057
1058 if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode))
1059 base = get_extra_isize(dn->inode);
1060
1061 /* Get physical address of data block */
1062 addr_array = blkaddr_in_node(rn);
1063 addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr);
1064}
1065
1066/*
1067 * Lock ordering for the change of data block address:
1068 * ->data_page
1069 * ->node_page
1070 * update block addresses in the node page
1071 */
1072void f2fs_set_data_blkaddr(struct dnode_of_data *dn)
1073{
1074 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
1075 __set_data_blkaddr(dn);
1076 if (set_page_dirty(dn->node_page))
1077 dn->node_changed = true;
1078}
1079
1080void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr)
1081{
1082 dn->data_blkaddr = blkaddr;
1083 f2fs_set_data_blkaddr(dn);
1084 f2fs_update_extent_cache(dn);
1085}
1086
1087/* dn->ofs_in_node will be returned with up-to-date last block pointer */
1088int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count)
1089{
1090 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1091 int err;
1092
1093 if (!count)
1094 return 0;
1095
1096 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
1097 return -EPERM;
1098 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1099 return err;
1100
1101 trace_f2fs_reserve_new_blocks(dn->inode, dn->nid,
1102 dn->ofs_in_node, count);
1103
1104 f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true);
1105
1106 for (; count > 0; dn->ofs_in_node++) {
1107 block_t blkaddr = f2fs_data_blkaddr(dn);
1108
1109 if (blkaddr == NULL_ADDR) {
1110 dn->data_blkaddr = NEW_ADDR;
1111 __set_data_blkaddr(dn);
1112 count--;
1113 }
1114 }
1115
1116 if (set_page_dirty(dn->node_page))
1117 dn->node_changed = true;
1118 return 0;
1119}
1120
1121/* Should keep dn->ofs_in_node unchanged */
1122int f2fs_reserve_new_block(struct dnode_of_data *dn)
1123{
1124 unsigned int ofs_in_node = dn->ofs_in_node;
1125 int ret;
1126
1127 ret = f2fs_reserve_new_blocks(dn, 1);
1128 dn->ofs_in_node = ofs_in_node;
1129 return ret;
1130}
1131
1132int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index)
1133{
1134 bool need_put = dn->inode_page ? false : true;
1135 int err;
1136
1137 err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE);
1138 if (err)
1139 return err;
1140
1141 if (dn->data_blkaddr == NULL_ADDR)
1142 err = f2fs_reserve_new_block(dn);
1143 if (err || need_put)
1144 f2fs_put_dnode(dn);
1145 return err;
1146}
1147
1148int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index)
1149{
1150 struct extent_info ei = {0, };
1151 struct inode *inode = dn->inode;
1152
1153 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1154 dn->data_blkaddr = ei.blk + index - ei.fofs;
1155 return 0;
1156 }
1157
1158 return f2fs_reserve_block(dn, index);
1159}
1160
1161struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
1162 int op_flags, bool for_write)
1163{
1164 struct address_space *mapping = inode->i_mapping;
1165 struct dnode_of_data dn;
1166 struct page *page;
1167 struct extent_info ei = {0, };
1168 int err;
1169
1170 page = f2fs_grab_cache_page(mapping, index, for_write);
1171 if (!page)
1172 return ERR_PTR(-ENOMEM);
1173
1174 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
1175 dn.data_blkaddr = ei.blk + index - ei.fofs;
1176 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
1177 DATA_GENERIC_ENHANCE_READ)) {
1178 err = -EFSCORRUPTED;
1179 goto put_err;
1180 }
1181 goto got_it;
1182 }
1183
1184 set_new_dnode(&dn, inode, NULL, NULL, 0);
1185 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
1186 if (err)
1187 goto put_err;
1188 f2fs_put_dnode(&dn);
1189
1190 if (unlikely(dn.data_blkaddr == NULL_ADDR)) {
1191 err = -ENOENT;
1192 goto put_err;
1193 }
1194 if (dn.data_blkaddr != NEW_ADDR &&
1195 !f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
1196 dn.data_blkaddr,
1197 DATA_GENERIC_ENHANCE)) {
1198 err = -EFSCORRUPTED;
1199 goto put_err;
1200 }
1201got_it:
1202 if (PageUptodate(page)) {
1203 unlock_page(page);
1204 return page;
1205 }
1206
1207 /*
1208 * A new dentry page is allocated but not able to be written, since its
1209 * new inode page couldn't be allocated due to -ENOSPC.
1210 * In such the case, its blkaddr can be remained as NEW_ADDR.
1211 * see, f2fs_add_link -> f2fs_get_new_data_page ->
1212 * f2fs_init_inode_metadata.
1213 */
1214 if (dn.data_blkaddr == NEW_ADDR) {
1215 zero_user_segment(page, 0, PAGE_SIZE);
1216 if (!PageUptodate(page))
1217 SetPageUptodate(page);
1218 unlock_page(page);
1219 return page;
1220 }
1221
1222 err = f2fs_submit_page_read(inode, page, dn.data_blkaddr,
1223 op_flags, for_write);
1224 if (err)
1225 goto put_err;
1226 return page;
1227
1228put_err:
1229 f2fs_put_page(page, 1);
1230 return ERR_PTR(err);
1231}
1232
1233struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index)
1234{
1235 struct address_space *mapping = inode->i_mapping;
1236 struct page *page;
1237
1238 page = find_get_page(mapping, index);
1239 if (page && PageUptodate(page))
1240 return page;
1241 f2fs_put_page(page, 0);
1242
1243 page = f2fs_get_read_data_page(inode, index, 0, false);
1244 if (IS_ERR(page))
1245 return page;
1246
1247 if (PageUptodate(page))
1248 return page;
1249
1250 wait_on_page_locked(page);
1251 if (unlikely(!PageUptodate(page))) {
1252 f2fs_put_page(page, 0);
1253 return ERR_PTR(-EIO);
1254 }
1255 return page;
1256}
1257
1258/*
1259 * If it tries to access a hole, return an error.
1260 * Because, the callers, functions in dir.c and GC, should be able to know
1261 * whether this page exists or not.
1262 */
1263struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index,
1264 bool for_write)
1265{
1266 struct address_space *mapping = inode->i_mapping;
1267 struct page *page;
1268repeat:
1269 page = f2fs_get_read_data_page(inode, index, 0, for_write);
1270 if (IS_ERR(page))
1271 return page;
1272
1273 /* wait for read completion */
1274 lock_page(page);
1275 if (unlikely(page->mapping != mapping)) {
1276 f2fs_put_page(page, 1);
1277 goto repeat;
1278 }
1279 if (unlikely(!PageUptodate(page))) {
1280 f2fs_put_page(page, 1);
1281 return ERR_PTR(-EIO);
1282 }
1283 return page;
1284}
1285
1286/*
1287 * Caller ensures that this data page is never allocated.
1288 * A new zero-filled data page is allocated in the page cache.
1289 *
1290 * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and
1291 * f2fs_unlock_op().
1292 * Note that, ipage is set only by make_empty_dir, and if any error occur,
1293 * ipage should be released by this function.
1294 */
1295struct page *f2fs_get_new_data_page(struct inode *inode,
1296 struct page *ipage, pgoff_t index, bool new_i_size)
1297{
1298 struct address_space *mapping = inode->i_mapping;
1299 struct page *page;
1300 struct dnode_of_data dn;
1301 int err;
1302
1303 page = f2fs_grab_cache_page(mapping, index, true);
1304 if (!page) {
1305 /*
1306 * before exiting, we should make sure ipage will be released
1307 * if any error occur.
1308 */
1309 f2fs_put_page(ipage, 1);
1310 return ERR_PTR(-ENOMEM);
1311 }
1312
1313 set_new_dnode(&dn, inode, ipage, NULL, 0);
1314 err = f2fs_reserve_block(&dn, index);
1315 if (err) {
1316 f2fs_put_page(page, 1);
1317 return ERR_PTR(err);
1318 }
1319 if (!ipage)
1320 f2fs_put_dnode(&dn);
1321
1322 if (PageUptodate(page))
1323 goto got_it;
1324
1325 if (dn.data_blkaddr == NEW_ADDR) {
1326 zero_user_segment(page, 0, PAGE_SIZE);
1327 if (!PageUptodate(page))
1328 SetPageUptodate(page);
1329 } else {
1330 f2fs_put_page(page, 1);
1331
1332 /* if ipage exists, blkaddr should be NEW_ADDR */
1333 f2fs_bug_on(F2FS_I_SB(inode), ipage);
1334 page = f2fs_get_lock_data_page(inode, index, true);
1335 if (IS_ERR(page))
1336 return page;
1337 }
1338got_it:
1339 if (new_i_size && i_size_read(inode) <
1340 ((loff_t)(index + 1) << PAGE_SHIFT))
1341 f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT));
1342 return page;
1343}
1344
1345static int __allocate_data_block(struct dnode_of_data *dn, int seg_type)
1346{
1347 struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
1348 struct f2fs_summary sum;
1349 struct node_info ni;
1350 block_t old_blkaddr;
1351 blkcnt_t count = 1;
1352 int err;
1353
1354 if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC)))
1355 return -EPERM;
1356
1357 err = f2fs_get_node_info(sbi, dn->nid, &ni, false);
1358 if (err)
1359 return err;
1360
1361 dn->data_blkaddr = f2fs_data_blkaddr(dn);
1362 if (dn->data_blkaddr != NULL_ADDR)
1363 goto alloc;
1364
1365 if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count))))
1366 return err;
1367
1368alloc:
1369 set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version);
1370 old_blkaddr = dn->data_blkaddr;
1371 f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr,
1372 &sum, seg_type, NULL);
1373 if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) {
1374 invalidate_mapping_pages(META_MAPPING(sbi),
1375 old_blkaddr, old_blkaddr);
1376 f2fs_invalidate_compress_page(sbi, old_blkaddr);
1377 }
1378 f2fs_update_data_blkaddr(dn, dn->data_blkaddr);
1379 return 0;
1380}
1381
1382void f2fs_do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock)
1383{
1384 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1385 if (lock)
1386 down_read(&sbi->node_change);
1387 else
1388 up_read(&sbi->node_change);
1389 } else {
1390 if (lock)
1391 f2fs_lock_op(sbi);
1392 else
1393 f2fs_unlock_op(sbi);
1394 }
1395}
1396
1397/*
1398 * f2fs_map_blocks() tries to find or build mapping relationship which
1399 * maps continuous logical blocks to physical blocks, and return such
1400 * info via f2fs_map_blocks structure.
1401 */
1402int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map,
1403 int create, int flag)
1404{
1405 unsigned int maxblocks = map->m_len;
1406 struct dnode_of_data dn;
1407 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1408 int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE;
1409 pgoff_t pgofs, end_offset, end;
1410 int err = 0, ofs = 1;
1411 unsigned int ofs_in_node, last_ofs_in_node;
1412 blkcnt_t prealloc;
1413 struct extent_info ei = {0, };
1414 block_t blkaddr;
1415 unsigned int start_pgofs;
1416 int bidx = 0;
1417
1418 if (!maxblocks)
1419 return 0;
1420
1421 map->m_bdev = inode->i_sb->s_bdev;
1422 map->m_multidev_dio =
1423 f2fs_allow_multi_device_dio(F2FS_I_SB(inode), flag);
1424
1425 map->m_len = 0;
1426 map->m_flags = 0;
1427
1428 /* it only supports block size == page size */
1429 pgofs = (pgoff_t)map->m_lblk;
1430 end = pgofs + maxblocks;
1431
1432 if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) {
1433 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
1434 map->m_may_create)
1435 goto next_dnode;
1436
1437 map->m_pblk = ei.blk + pgofs - ei.fofs;
1438 map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs);
1439 map->m_flags = F2FS_MAP_MAPPED;
1440 if (map->m_next_extent)
1441 *map->m_next_extent = pgofs + map->m_len;
1442
1443 /* for hardware encryption, but to avoid potential issue in future */
1444 if (flag == F2FS_GET_BLOCK_DIO)
1445 f2fs_wait_on_block_writeback_range(inode,
1446 map->m_pblk, map->m_len);
1447
1448 if (map->m_multidev_dio) {
1449 block_t blk_addr = map->m_pblk;
1450
1451 bidx = f2fs_target_device_index(sbi, map->m_pblk);
1452
1453 map->m_bdev = FDEV(bidx).bdev;
1454 map->m_pblk -= FDEV(bidx).start_blk;
1455 map->m_len = min(map->m_len,
1456 FDEV(bidx).end_blk + 1 - map->m_pblk);
1457
1458 if (map->m_may_create)
1459 f2fs_update_device_state(sbi, inode->i_ino,
1460 blk_addr, map->m_len);
1461 }
1462 goto out;
1463 }
1464
1465next_dnode:
1466 if (map->m_may_create)
1467 f2fs_do_map_lock(sbi, flag, true);
1468
1469 /* When reading holes, we need its node page */
1470 set_new_dnode(&dn, inode, NULL, NULL, 0);
1471 err = f2fs_get_dnode_of_data(&dn, pgofs, mode);
1472 if (err) {
1473 if (flag == F2FS_GET_BLOCK_BMAP)
1474 map->m_pblk = 0;
1475
1476 if (err == -ENOENT) {
1477 /*
1478 * There is one exceptional case that read_node_page()
1479 * may return -ENOENT due to filesystem has been
1480 * shutdown or cp_error, so force to convert error
1481 * number to EIO for such case.
1482 */
1483 if (map->m_may_create &&
1484 (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) ||
1485 f2fs_cp_error(sbi))) {
1486 err = -EIO;
1487 goto unlock_out;
1488 }
1489
1490 err = 0;
1491 if (map->m_next_pgofs)
1492 *map->m_next_pgofs =
1493 f2fs_get_next_page_offset(&dn, pgofs);
1494 if (map->m_next_extent)
1495 *map->m_next_extent =
1496 f2fs_get_next_page_offset(&dn, pgofs);
1497 }
1498 goto unlock_out;
1499 }
1500
1501 start_pgofs = pgofs;
1502 prealloc = 0;
1503 last_ofs_in_node = ofs_in_node = dn.ofs_in_node;
1504 end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
1505
1506next_block:
1507 blkaddr = f2fs_data_blkaddr(&dn);
1508
1509 if (__is_valid_data_blkaddr(blkaddr) &&
1510 !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
1511 err = -EFSCORRUPTED;
1512 goto sync_out;
1513 }
1514
1515 if (__is_valid_data_blkaddr(blkaddr)) {
1516 /* use out-place-update for driect IO under LFS mode */
1517 if (f2fs_lfs_mode(sbi) && flag == F2FS_GET_BLOCK_DIO &&
1518 map->m_may_create) {
1519 err = __allocate_data_block(&dn, map->m_seg_type);
1520 if (err)
1521 goto sync_out;
1522 blkaddr = dn.data_blkaddr;
1523 set_inode_flag(inode, FI_APPEND_WRITE);
1524 }
1525 } else {
1526 if (create) {
1527 if (unlikely(f2fs_cp_error(sbi))) {
1528 err = -EIO;
1529 goto sync_out;
1530 }
1531 if (flag == F2FS_GET_BLOCK_PRE_AIO) {
1532 if (blkaddr == NULL_ADDR) {
1533 prealloc++;
1534 last_ofs_in_node = dn.ofs_in_node;
1535 }
1536 } else {
1537 WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO &&
1538 flag != F2FS_GET_BLOCK_DIO);
1539 err = __allocate_data_block(&dn,
1540 map->m_seg_type);
1541 if (!err) {
1542 if (flag == F2FS_GET_BLOCK_PRE_DIO)
1543 file_need_truncate(inode);
1544 set_inode_flag(inode, FI_APPEND_WRITE);
1545 }
1546 }
1547 if (err)
1548 goto sync_out;
1549 map->m_flags |= F2FS_MAP_NEW;
1550 blkaddr = dn.data_blkaddr;
1551 } else {
1552 if (f2fs_compressed_file(inode) &&
1553 f2fs_sanity_check_cluster(&dn) &&
1554 (flag != F2FS_GET_BLOCK_FIEMAP ||
1555 IS_ENABLED(CONFIG_F2FS_CHECK_FS))) {
1556 err = -EFSCORRUPTED;
1557 goto sync_out;
1558 }
1559 if (flag == F2FS_GET_BLOCK_BMAP) {
1560 map->m_pblk = 0;
1561 goto sync_out;
1562 }
1563 if (flag == F2FS_GET_BLOCK_PRECACHE)
1564 goto sync_out;
1565 if (flag == F2FS_GET_BLOCK_FIEMAP &&
1566 blkaddr == NULL_ADDR) {
1567 if (map->m_next_pgofs)
1568 *map->m_next_pgofs = pgofs + 1;
1569 goto sync_out;
1570 }
1571 if (flag != F2FS_GET_BLOCK_FIEMAP) {
1572 /* for defragment case */
1573 if (map->m_next_pgofs)
1574 *map->m_next_pgofs = pgofs + 1;
1575 goto sync_out;
1576 }
1577 }
1578 }
1579
1580 if (flag == F2FS_GET_BLOCK_PRE_AIO)
1581 goto skip;
1582
1583 if (map->m_multidev_dio)
1584 bidx = f2fs_target_device_index(sbi, blkaddr);
1585
1586 if (map->m_len == 0) {
1587 /* preallocated unwritten block should be mapped for fiemap. */
1588 if (blkaddr == NEW_ADDR)
1589 map->m_flags |= F2FS_MAP_UNWRITTEN;
1590 map->m_flags |= F2FS_MAP_MAPPED;
1591
1592 map->m_pblk = blkaddr;
1593 map->m_len = 1;
1594
1595 if (map->m_multidev_dio)
1596 map->m_bdev = FDEV(bidx).bdev;
1597 } else if ((map->m_pblk != NEW_ADDR &&
1598 blkaddr == (map->m_pblk + ofs)) ||
1599 (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) ||
1600 flag == F2FS_GET_BLOCK_PRE_DIO) {
1601 if (map->m_multidev_dio && map->m_bdev != FDEV(bidx).bdev)
1602 goto sync_out;
1603 ofs++;
1604 map->m_len++;
1605 } else {
1606 goto sync_out;
1607 }
1608
1609skip:
1610 dn.ofs_in_node++;
1611 pgofs++;
1612
1613 /* preallocate blocks in batch for one dnode page */
1614 if (flag == F2FS_GET_BLOCK_PRE_AIO &&
1615 (pgofs == end || dn.ofs_in_node == end_offset)) {
1616
1617 dn.ofs_in_node = ofs_in_node;
1618 err = f2fs_reserve_new_blocks(&dn, prealloc);
1619 if (err)
1620 goto sync_out;
1621
1622 map->m_len += dn.ofs_in_node - ofs_in_node;
1623 if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) {
1624 err = -ENOSPC;
1625 goto sync_out;
1626 }
1627 dn.ofs_in_node = end_offset;
1628 }
1629
1630 if (pgofs >= end)
1631 goto sync_out;
1632 else if (dn.ofs_in_node < end_offset)
1633 goto next_block;
1634
1635 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1636 if (map->m_flags & F2FS_MAP_MAPPED) {
1637 unsigned int ofs = start_pgofs - map->m_lblk;
1638
1639 f2fs_update_extent_cache_range(&dn,
1640 start_pgofs, map->m_pblk + ofs,
1641 map->m_len - ofs);
1642 }
1643 }
1644
1645 f2fs_put_dnode(&dn);
1646
1647 if (map->m_may_create) {
1648 f2fs_do_map_lock(sbi, flag, false);
1649 f2fs_balance_fs(sbi, dn.node_changed);
1650 }
1651 goto next_dnode;
1652
1653sync_out:
1654
1655 if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED) {
1656 /*
1657 * for hardware encryption, but to avoid potential issue
1658 * in future
1659 */
1660 f2fs_wait_on_block_writeback_range(inode,
1661 map->m_pblk, map->m_len);
1662 invalidate_mapping_pages(META_MAPPING(sbi),
1663 map->m_pblk, map->m_pblk);
1664
1665 if (map->m_multidev_dio) {
1666 block_t blk_addr = map->m_pblk;
1667
1668 bidx = f2fs_target_device_index(sbi, map->m_pblk);
1669
1670 map->m_bdev = FDEV(bidx).bdev;
1671 map->m_pblk -= FDEV(bidx).start_blk;
1672
1673 if (map->m_may_create)
1674 f2fs_update_device_state(sbi, inode->i_ino,
1675 blk_addr, map->m_len);
1676
1677 f2fs_bug_on(sbi, blk_addr + map->m_len >
1678 FDEV(bidx).end_blk + 1);
1679 }
1680 }
1681
1682 if (flag == F2FS_GET_BLOCK_PRECACHE) {
1683 if (map->m_flags & F2FS_MAP_MAPPED) {
1684 unsigned int ofs = start_pgofs - map->m_lblk;
1685
1686 f2fs_update_extent_cache_range(&dn,
1687 start_pgofs, map->m_pblk + ofs,
1688 map->m_len - ofs);
1689 }
1690 if (map->m_next_extent)
1691 *map->m_next_extent = pgofs + 1;
1692 }
1693 f2fs_put_dnode(&dn);
1694unlock_out:
1695 if (map->m_may_create) {
1696 f2fs_do_map_lock(sbi, flag, false);
1697 f2fs_balance_fs(sbi, dn.node_changed);
1698 }
1699out:
1700 trace_f2fs_map_blocks(inode, map, create, flag, err);
1701 return err;
1702}
1703
1704bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len)
1705{
1706 struct f2fs_map_blocks map;
1707 block_t last_lblk;
1708 int err;
1709
1710 if (pos + len > i_size_read(inode))
1711 return false;
1712
1713 map.m_lblk = F2FS_BYTES_TO_BLK(pos);
1714 map.m_next_pgofs = NULL;
1715 map.m_next_extent = NULL;
1716 map.m_seg_type = NO_CHECK_TYPE;
1717 map.m_may_create = false;
1718 last_lblk = F2FS_BLK_ALIGN(pos + len);
1719
1720 while (map.m_lblk < last_lblk) {
1721 map.m_len = last_lblk - map.m_lblk;
1722 err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT);
1723 if (err || map.m_len == 0)
1724 return false;
1725 map.m_lblk += map.m_len;
1726 }
1727 return true;
1728}
1729
1730static inline u64 bytes_to_blks(struct inode *inode, u64 bytes)
1731{
1732 return (bytes >> inode->i_blkbits);
1733}
1734
1735static inline u64 blks_to_bytes(struct inode *inode, u64 blks)
1736{
1737 return (blks << inode->i_blkbits);
1738}
1739
1740static int f2fs_xattr_fiemap(struct inode *inode,
1741 struct fiemap_extent_info *fieinfo)
1742{
1743 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
1744 struct page *page;
1745 struct node_info ni;
1746 __u64 phys = 0, len;
1747 __u32 flags;
1748 nid_t xnid = F2FS_I(inode)->i_xattr_nid;
1749 int err = 0;
1750
1751 if (f2fs_has_inline_xattr(inode)) {
1752 int offset;
1753
1754 page = f2fs_grab_cache_page(NODE_MAPPING(sbi),
1755 inode->i_ino, false);
1756 if (!page)
1757 return -ENOMEM;
1758
1759 err = f2fs_get_node_info(sbi, inode->i_ino, &ni, false);
1760 if (err) {
1761 f2fs_put_page(page, 1);
1762 return err;
1763 }
1764
1765 phys = blks_to_bytes(inode, ni.blk_addr);
1766 offset = offsetof(struct f2fs_inode, i_addr) +
1767 sizeof(__le32) * (DEF_ADDRS_PER_INODE -
1768 get_inline_xattr_addrs(inode));
1769
1770 phys += offset;
1771 len = inline_xattr_size(inode);
1772
1773 f2fs_put_page(page, 1);
1774
1775 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED;
1776
1777 if (!xnid)
1778 flags |= FIEMAP_EXTENT_LAST;
1779
1780 err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags);
1781 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
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, false);
1792 if (err) {
1793 f2fs_put_page(page, 1);
1794 return err;
1795 }
1796
1797 phys = blks_to_bytes(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 trace_f2fs_fiemap(inode, 0, phys, len, flags, err);
1808 }
1809
1810 return (err < 0 ? err : 0);
1811}
1812
1813static loff_t max_inode_blocks(struct inode *inode)
1814{
1815 loff_t result = ADDRS_PER_INODE(inode);
1816 loff_t leaf_count = ADDRS_PER_BLOCK(inode);
1817
1818 /* two direct node blocks */
1819 result += (leaf_count * 2);
1820
1821 /* two indirect node blocks */
1822 leaf_count *= NIDS_PER_BLOCK;
1823 result += (leaf_count * 2);
1824
1825 /* one double indirect node block */
1826 leaf_count *= NIDS_PER_BLOCK;
1827 result += leaf_count;
1828
1829 return result;
1830}
1831
1832int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
1833 u64 start, u64 len)
1834{
1835 struct f2fs_map_blocks map;
1836 sector_t start_blk, last_blk;
1837 pgoff_t next_pgofs;
1838 u64 logical = 0, phys = 0, size = 0;
1839 u32 flags = 0;
1840 int ret = 0;
1841 bool compr_cluster = false, compr_appended;
1842 unsigned int cluster_size = F2FS_I(inode)->i_cluster_size;
1843 unsigned int count_in_cluster = 0;
1844 loff_t maxbytes;
1845
1846 if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) {
1847 ret = f2fs_precache_extents(inode);
1848 if (ret)
1849 return ret;
1850 }
1851
1852 ret = fiemap_prep(inode, fieinfo, start, &len, FIEMAP_FLAG_XATTR);
1853 if (ret)
1854 return ret;
1855
1856 inode_lock(inode);
1857
1858 maxbytes = max_file_blocks(inode) << F2FS_BLKSIZE_BITS;
1859 if (start > maxbytes) {
1860 ret = -EFBIG;
1861 goto out;
1862 }
1863
1864 if (len > maxbytes || (maxbytes - len) < start)
1865 len = maxbytes - start;
1866
1867 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
1868 ret = f2fs_xattr_fiemap(inode, fieinfo);
1869 goto out;
1870 }
1871
1872 if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) {
1873 ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len);
1874 if (ret != -EAGAIN)
1875 goto out;
1876 }
1877
1878 if (bytes_to_blks(inode, len) == 0)
1879 len = blks_to_bytes(inode, 1);
1880
1881 start_blk = bytes_to_blks(inode, start);
1882 last_blk = bytes_to_blks(inode, start + len - 1);
1883
1884next:
1885 memset(&map, 0, sizeof(map));
1886 map.m_lblk = start_blk;
1887 map.m_len = bytes_to_blks(inode, len);
1888 map.m_next_pgofs = &next_pgofs;
1889 map.m_seg_type = NO_CHECK_TYPE;
1890
1891 if (compr_cluster) {
1892 map.m_lblk += 1;
1893 map.m_len = cluster_size - count_in_cluster;
1894 }
1895
1896 ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
1897 if (ret)
1898 goto out;
1899
1900 /* HOLE */
1901 if (!compr_cluster && !(map.m_flags & F2FS_MAP_FLAGS)) {
1902 start_blk = next_pgofs;
1903
1904 if (blks_to_bytes(inode, start_blk) < blks_to_bytes(inode,
1905 max_inode_blocks(inode)))
1906 goto prep_next;
1907
1908 flags |= FIEMAP_EXTENT_LAST;
1909 }
1910
1911 compr_appended = false;
1912 /* In a case of compressed cluster, append this to the last extent */
1913 if (compr_cluster && ((map.m_flags & F2FS_MAP_UNWRITTEN) ||
1914 !(map.m_flags & F2FS_MAP_FLAGS))) {
1915 compr_appended = true;
1916 goto skip_fill;
1917 }
1918
1919 if (size) {
1920 flags |= FIEMAP_EXTENT_MERGED;
1921 if (IS_ENCRYPTED(inode))
1922 flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
1923
1924 ret = fiemap_fill_next_extent(fieinfo, logical,
1925 phys, size, flags);
1926 trace_f2fs_fiemap(inode, logical, phys, size, flags, ret);
1927 if (ret)
1928 goto out;
1929 size = 0;
1930 }
1931
1932 if (start_blk > last_blk)
1933 goto out;
1934
1935skip_fill:
1936 if (map.m_pblk == COMPRESS_ADDR) {
1937 compr_cluster = true;
1938 count_in_cluster = 1;
1939 } else if (compr_appended) {
1940 unsigned int appended_blks = cluster_size -
1941 count_in_cluster + 1;
1942 size += blks_to_bytes(inode, appended_blks);
1943 start_blk += appended_blks;
1944 compr_cluster = false;
1945 } else {
1946 logical = blks_to_bytes(inode, start_blk);
1947 phys = __is_valid_data_blkaddr(map.m_pblk) ?
1948 blks_to_bytes(inode, map.m_pblk) : 0;
1949 size = blks_to_bytes(inode, map.m_len);
1950 flags = 0;
1951
1952 if (compr_cluster) {
1953 flags = FIEMAP_EXTENT_ENCODED;
1954 count_in_cluster += map.m_len;
1955 if (count_in_cluster == cluster_size) {
1956 compr_cluster = false;
1957 size += blks_to_bytes(inode, 1);
1958 }
1959 } else if (map.m_flags & F2FS_MAP_UNWRITTEN) {
1960 flags = FIEMAP_EXTENT_UNWRITTEN;
1961 }
1962
1963 start_blk += bytes_to_blks(inode, size);
1964 }
1965
1966prep_next:
1967 cond_resched();
1968 if (fatal_signal_pending(current))
1969 ret = -EINTR;
1970 else
1971 goto next;
1972out:
1973 if (ret == 1)
1974 ret = 0;
1975
1976 inode_unlock(inode);
1977 return ret;
1978}
1979
1980static inline loff_t f2fs_readpage_limit(struct inode *inode)
1981{
1982 if (IS_ENABLED(CONFIG_FS_VERITY) &&
1983 (IS_VERITY(inode) || f2fs_verity_in_progress(inode)))
1984 return inode->i_sb->s_maxbytes;
1985
1986 return i_size_read(inode);
1987}
1988
1989static int f2fs_read_single_page(struct inode *inode, struct page *page,
1990 unsigned nr_pages,
1991 struct f2fs_map_blocks *map,
1992 struct bio **bio_ret,
1993 sector_t *last_block_in_bio,
1994 bool is_readahead)
1995{
1996 struct bio *bio = *bio_ret;
1997 const unsigned blocksize = blks_to_bytes(inode, 1);
1998 sector_t block_in_file;
1999 sector_t last_block;
2000 sector_t last_block_in_file;
2001 sector_t block_nr;
2002 int ret = 0;
2003
2004 block_in_file = (sector_t)page_index(page);
2005 last_block = block_in_file + nr_pages;
2006 last_block_in_file = bytes_to_blks(inode,
2007 f2fs_readpage_limit(inode) + blocksize - 1);
2008 if (last_block > last_block_in_file)
2009 last_block = last_block_in_file;
2010
2011 /* just zeroing out page which is beyond EOF */
2012 if (block_in_file >= last_block)
2013 goto zero_out;
2014 /*
2015 * Map blocks using the previous result first.
2016 */
2017 if ((map->m_flags & F2FS_MAP_MAPPED) &&
2018 block_in_file > map->m_lblk &&
2019 block_in_file < (map->m_lblk + map->m_len))
2020 goto got_it;
2021
2022 /*
2023 * Then do more f2fs_map_blocks() calls until we are
2024 * done with this page.
2025 */
2026 map->m_lblk = block_in_file;
2027 map->m_len = last_block - block_in_file;
2028
2029 ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
2030 if (ret)
2031 goto out;
2032got_it:
2033 if ((map->m_flags & F2FS_MAP_MAPPED)) {
2034 block_nr = map->m_pblk + block_in_file - map->m_lblk;
2035 SetPageMappedToDisk(page);
2036
2037 if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
2038 DATA_GENERIC_ENHANCE_READ)) {
2039 ret = -EFSCORRUPTED;
2040 goto out;
2041 }
2042 } else {
2043zero_out:
2044 zero_user_segment(page, 0, PAGE_SIZE);
2045 if (f2fs_need_verity(inode, page->index) &&
2046 !fsverity_verify_page(page)) {
2047 ret = -EIO;
2048 goto out;
2049 }
2050 if (!PageUptodate(page))
2051 SetPageUptodate(page);
2052 unlock_page(page);
2053 goto out;
2054 }
2055
2056 /*
2057 * This page will go to BIO. Do we need to send this
2058 * BIO off first?
2059 */
2060 if (bio && (!page_is_mergeable(F2FS_I_SB(inode), bio,
2061 *last_block_in_bio, block_nr) ||
2062 !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
2063submit_and_realloc:
2064 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2065 bio = NULL;
2066 }
2067 if (bio == NULL) {
2068 bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
2069 is_readahead ? REQ_RAHEAD : 0, page->index,
2070 false);
2071 if (IS_ERR(bio)) {
2072 ret = PTR_ERR(bio);
2073 bio = NULL;
2074 goto out;
2075 }
2076 }
2077
2078 /*
2079 * If the page is under writeback, we need to wait for
2080 * its completion to see the correct decrypted data.
2081 */
2082 f2fs_wait_on_block_writeback(inode, block_nr);
2083
2084 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2085 goto submit_and_realloc;
2086
2087 inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
2088 f2fs_update_iostat(F2FS_I_SB(inode), FS_DATA_READ_IO, F2FS_BLKSIZE);
2089 ClearPageError(page);
2090 *last_block_in_bio = block_nr;
2091 goto out;
2092out:
2093 *bio_ret = bio;
2094 return ret;
2095}
2096
2097#ifdef CONFIG_F2FS_FS_COMPRESSION
2098int f2fs_read_multi_pages(struct compress_ctx *cc, struct bio **bio_ret,
2099 unsigned nr_pages, sector_t *last_block_in_bio,
2100 bool is_readahead, bool for_write)
2101{
2102 struct dnode_of_data dn;
2103 struct inode *inode = cc->inode;
2104 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2105 struct bio *bio = *bio_ret;
2106 unsigned int start_idx = cc->cluster_idx << cc->log_cluster_size;
2107 sector_t last_block_in_file;
2108 const unsigned blocksize = blks_to_bytes(inode, 1);
2109 struct decompress_io_ctx *dic = NULL;
2110 struct extent_info ei = {0, };
2111 bool from_dnode = true;
2112 int i;
2113 int ret = 0;
2114
2115 f2fs_bug_on(sbi, f2fs_cluster_is_empty(cc));
2116
2117 last_block_in_file = bytes_to_blks(inode,
2118 f2fs_readpage_limit(inode) + blocksize - 1);
2119
2120 /* get rid of pages beyond EOF */
2121 for (i = 0; i < cc->cluster_size; i++) {
2122 struct page *page = cc->rpages[i];
2123
2124 if (!page)
2125 continue;
2126 if ((sector_t)page->index >= last_block_in_file) {
2127 zero_user_segment(page, 0, PAGE_SIZE);
2128 if (!PageUptodate(page))
2129 SetPageUptodate(page);
2130 } else if (!PageUptodate(page)) {
2131 continue;
2132 }
2133 unlock_page(page);
2134 if (for_write)
2135 put_page(page);
2136 cc->rpages[i] = NULL;
2137 cc->nr_rpages--;
2138 }
2139
2140 /* we are done since all pages are beyond EOF */
2141 if (f2fs_cluster_is_empty(cc))
2142 goto out;
2143
2144 if (f2fs_lookup_extent_cache(inode, start_idx, &ei))
2145 from_dnode = false;
2146
2147 if (!from_dnode)
2148 goto skip_reading_dnode;
2149
2150 set_new_dnode(&dn, inode, NULL, NULL, 0);
2151 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
2152 if (ret)
2153 goto out;
2154
2155 f2fs_bug_on(sbi, dn.data_blkaddr != COMPRESS_ADDR);
2156
2157skip_reading_dnode:
2158 for (i = 1; i < cc->cluster_size; i++) {
2159 block_t blkaddr;
2160
2161 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_page,
2162 dn.ofs_in_node + i) :
2163 ei.blk + i - 1;
2164
2165 if (!__is_valid_data_blkaddr(blkaddr))
2166 break;
2167
2168 if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
2169 ret = -EFAULT;
2170 goto out_put_dnode;
2171 }
2172 cc->nr_cpages++;
2173
2174 if (!from_dnode && i >= ei.c_len)
2175 break;
2176 }
2177
2178 /* nothing to decompress */
2179 if (cc->nr_cpages == 0) {
2180 ret = 0;
2181 goto out_put_dnode;
2182 }
2183
2184 dic = f2fs_alloc_dic(cc);
2185 if (IS_ERR(dic)) {
2186 ret = PTR_ERR(dic);
2187 goto out_put_dnode;
2188 }
2189
2190 for (i = 0; i < cc->nr_cpages; i++) {
2191 struct page *page = dic->cpages[i];
2192 block_t blkaddr;
2193 struct bio_post_read_ctx *ctx;
2194
2195 blkaddr = from_dnode ? data_blkaddr(dn.inode, dn.node_page,
2196 dn.ofs_in_node + i + 1) :
2197 ei.blk + i;
2198
2199 f2fs_wait_on_block_writeback(inode, blkaddr);
2200
2201 if (f2fs_load_compressed_page(sbi, page, blkaddr)) {
2202 if (atomic_dec_and_test(&dic->remaining_pages))
2203 f2fs_decompress_cluster(dic);
2204 continue;
2205 }
2206
2207 if (bio && (!page_is_mergeable(sbi, bio,
2208 *last_block_in_bio, blkaddr) ||
2209 !f2fs_crypt_mergeable_bio(bio, inode, page->index, NULL))) {
2210submit_and_realloc:
2211 __submit_bio(sbi, bio, DATA);
2212 bio = NULL;
2213 }
2214
2215 if (!bio) {
2216 bio = f2fs_grab_read_bio(inode, blkaddr, nr_pages,
2217 is_readahead ? REQ_RAHEAD : 0,
2218 page->index, for_write);
2219 if (IS_ERR(bio)) {
2220 ret = PTR_ERR(bio);
2221 f2fs_decompress_end_io(dic, ret);
2222 f2fs_put_dnode(&dn);
2223 *bio_ret = NULL;
2224 return ret;
2225 }
2226 }
2227
2228 if (bio_add_page(bio, page, blocksize, 0) < blocksize)
2229 goto submit_and_realloc;
2230
2231 ctx = get_post_read_ctx(bio);
2232 ctx->enabled_steps |= STEP_DECOMPRESS;
2233 refcount_inc(&dic->refcnt);
2234
2235 inc_page_count(sbi, F2FS_RD_DATA);
2236 f2fs_update_iostat(sbi, FS_DATA_READ_IO, F2FS_BLKSIZE);
2237 f2fs_update_iostat(sbi, FS_CDATA_READ_IO, F2FS_BLKSIZE);
2238 ClearPageError(page);
2239 *last_block_in_bio = blkaddr;
2240 }
2241
2242 if (from_dnode)
2243 f2fs_put_dnode(&dn);
2244
2245 *bio_ret = bio;
2246 return 0;
2247
2248out_put_dnode:
2249 if (from_dnode)
2250 f2fs_put_dnode(&dn);
2251out:
2252 for (i = 0; i < cc->cluster_size; i++) {
2253 if (cc->rpages[i]) {
2254 ClearPageUptodate(cc->rpages[i]);
2255 ClearPageError(cc->rpages[i]);
2256 unlock_page(cc->rpages[i]);
2257 }
2258 }
2259 *bio_ret = bio;
2260 return ret;
2261}
2262#endif
2263
2264/*
2265 * This function was originally taken from fs/mpage.c, and customized for f2fs.
2266 * Major change was from block_size == page_size in f2fs by default.
2267 */
2268static int f2fs_mpage_readpages(struct inode *inode,
2269 struct readahead_control *rac, struct page *page)
2270{
2271 struct bio *bio = NULL;
2272 sector_t last_block_in_bio = 0;
2273 struct f2fs_map_blocks map;
2274#ifdef CONFIG_F2FS_FS_COMPRESSION
2275 struct compress_ctx cc = {
2276 .inode = inode,
2277 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2278 .cluster_size = F2FS_I(inode)->i_cluster_size,
2279 .cluster_idx = NULL_CLUSTER,
2280 .rpages = NULL,
2281 .cpages = NULL,
2282 .nr_rpages = 0,
2283 .nr_cpages = 0,
2284 };
2285 pgoff_t nc_cluster_idx = NULL_CLUSTER;
2286#endif
2287 unsigned nr_pages = rac ? readahead_count(rac) : 1;
2288 unsigned max_nr_pages = nr_pages;
2289 int ret = 0;
2290
2291 map.m_pblk = 0;
2292 map.m_lblk = 0;
2293 map.m_len = 0;
2294 map.m_flags = 0;
2295 map.m_next_pgofs = NULL;
2296 map.m_next_extent = NULL;
2297 map.m_seg_type = NO_CHECK_TYPE;
2298 map.m_may_create = false;
2299
2300 for (; nr_pages; nr_pages--) {
2301 if (rac) {
2302 page = readahead_page(rac);
2303 prefetchw(&page->flags);
2304 }
2305
2306#ifdef CONFIG_F2FS_FS_COMPRESSION
2307 if (f2fs_compressed_file(inode)) {
2308 /* there are remained comressed pages, submit them */
2309 if (!f2fs_cluster_can_merge_page(&cc, page->index)) {
2310 ret = f2fs_read_multi_pages(&cc, &bio,
2311 max_nr_pages,
2312 &last_block_in_bio,
2313 rac != NULL, false);
2314 f2fs_destroy_compress_ctx(&cc, false);
2315 if (ret)
2316 goto set_error_page;
2317 }
2318 if (cc.cluster_idx == NULL_CLUSTER) {
2319 if (nc_cluster_idx ==
2320 page->index >> cc.log_cluster_size) {
2321 goto read_single_page;
2322 }
2323
2324 ret = f2fs_is_compressed_cluster(inode, page->index);
2325 if (ret < 0)
2326 goto set_error_page;
2327 else if (!ret) {
2328 nc_cluster_idx =
2329 page->index >> cc.log_cluster_size;
2330 goto read_single_page;
2331 }
2332
2333 nc_cluster_idx = NULL_CLUSTER;
2334 }
2335 ret = f2fs_init_compress_ctx(&cc);
2336 if (ret)
2337 goto set_error_page;
2338
2339 f2fs_compress_ctx_add_page(&cc, page);
2340
2341 goto next_page;
2342 }
2343read_single_page:
2344#endif
2345
2346 ret = f2fs_read_single_page(inode, page, max_nr_pages, &map,
2347 &bio, &last_block_in_bio, rac);
2348 if (ret) {
2349#ifdef CONFIG_F2FS_FS_COMPRESSION
2350set_error_page:
2351#endif
2352 SetPageError(page);
2353 zero_user_segment(page, 0, PAGE_SIZE);
2354 unlock_page(page);
2355 }
2356#ifdef CONFIG_F2FS_FS_COMPRESSION
2357next_page:
2358#endif
2359 if (rac)
2360 put_page(page);
2361
2362#ifdef CONFIG_F2FS_FS_COMPRESSION
2363 if (f2fs_compressed_file(inode)) {
2364 /* last page */
2365 if (nr_pages == 1 && !f2fs_cluster_is_empty(&cc)) {
2366 ret = f2fs_read_multi_pages(&cc, &bio,
2367 max_nr_pages,
2368 &last_block_in_bio,
2369 rac != NULL, false);
2370 f2fs_destroy_compress_ctx(&cc, false);
2371 }
2372 }
2373#endif
2374 }
2375 if (bio)
2376 __submit_bio(F2FS_I_SB(inode), bio, DATA);
2377 return ret;
2378}
2379
2380static int f2fs_read_data_page(struct file *file, struct page *page)
2381{
2382 struct inode *inode = page_file_mapping(page)->host;
2383 int ret = -EAGAIN;
2384
2385 trace_f2fs_readpage(page, DATA);
2386
2387 if (!f2fs_is_compress_backend_ready(inode)) {
2388 unlock_page(page);
2389 return -EOPNOTSUPP;
2390 }
2391
2392 /* If the file has inline data, try to read it directly */
2393 if (f2fs_has_inline_data(inode))
2394 ret = f2fs_read_inline_data(inode, page);
2395 if (ret == -EAGAIN)
2396 ret = f2fs_mpage_readpages(inode, NULL, page);
2397 return ret;
2398}
2399
2400static void f2fs_readahead(struct readahead_control *rac)
2401{
2402 struct inode *inode = rac->mapping->host;
2403
2404 trace_f2fs_readpages(inode, readahead_index(rac), readahead_count(rac));
2405
2406 if (!f2fs_is_compress_backend_ready(inode))
2407 return;
2408
2409 /* If the file has inline data, skip readpages */
2410 if (f2fs_has_inline_data(inode))
2411 return;
2412
2413 f2fs_mpage_readpages(inode, rac, NULL);
2414}
2415
2416int f2fs_encrypt_one_page(struct f2fs_io_info *fio)
2417{
2418 struct inode *inode = fio->page->mapping->host;
2419 struct page *mpage, *page;
2420 gfp_t gfp_flags = GFP_NOFS;
2421
2422 if (!f2fs_encrypted_file(inode))
2423 return 0;
2424
2425 page = fio->compressed_page ? fio->compressed_page : fio->page;
2426
2427 /* wait for GCed page writeback via META_MAPPING */
2428 f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
2429
2430 if (fscrypt_inode_uses_inline_crypto(inode))
2431 return 0;
2432
2433retry_encrypt:
2434 fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(page,
2435 PAGE_SIZE, 0, gfp_flags);
2436 if (IS_ERR(fio->encrypted_page)) {
2437 /* flush pending IOs and wait for a while in the ENOMEM case */
2438 if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
2439 f2fs_flush_merged_writes(fio->sbi);
2440 memalloc_retry_wait(GFP_NOFS);
2441 gfp_flags |= __GFP_NOFAIL;
2442 goto retry_encrypt;
2443 }
2444 return PTR_ERR(fio->encrypted_page);
2445 }
2446
2447 mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr);
2448 if (mpage) {
2449 if (PageUptodate(mpage))
2450 memcpy(page_address(mpage),
2451 page_address(fio->encrypted_page), PAGE_SIZE);
2452 f2fs_put_page(mpage, 1);
2453 }
2454 return 0;
2455}
2456
2457static inline bool check_inplace_update_policy(struct inode *inode,
2458 struct f2fs_io_info *fio)
2459{
2460 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2461 unsigned int policy = SM_I(sbi)->ipu_policy;
2462
2463 if (policy & (0x1 << F2FS_IPU_FORCE))
2464 return true;
2465 if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi))
2466 return true;
2467 if (policy & (0x1 << F2FS_IPU_UTIL) &&
2468 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2469 return true;
2470 if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) &&
2471 utilization(sbi) > SM_I(sbi)->min_ipu_util)
2472 return true;
2473
2474 /*
2475 * IPU for rewrite async pages
2476 */
2477 if (policy & (0x1 << F2FS_IPU_ASYNC) &&
2478 fio && fio->op == REQ_OP_WRITE &&
2479 !(fio->op_flags & REQ_SYNC) &&
2480 !IS_ENCRYPTED(inode))
2481 return true;
2482
2483 /* this is only set during fdatasync */
2484 if (policy & (0x1 << F2FS_IPU_FSYNC) &&
2485 is_inode_flag_set(inode, FI_NEED_IPU))
2486 return true;
2487
2488 if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2489 !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2490 return true;
2491
2492 return false;
2493}
2494
2495bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio)
2496{
2497 /* swap file is migrating in aligned write mode */
2498 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
2499 return false;
2500
2501 if (f2fs_is_pinned_file(inode))
2502 return true;
2503
2504 /* if this is cold file, we should overwrite to avoid fragmentation */
2505 if (file_is_cold(inode))
2506 return true;
2507
2508 return check_inplace_update_policy(inode, fio);
2509}
2510
2511bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio)
2512{
2513 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2514
2515 /* The below cases were checked when setting it. */
2516 if (f2fs_is_pinned_file(inode))
2517 return false;
2518 if (fio && is_sbi_flag_set(sbi, SBI_NEED_FSCK))
2519 return true;
2520 if (f2fs_lfs_mode(sbi))
2521 return true;
2522 if (S_ISDIR(inode->i_mode))
2523 return true;
2524 if (IS_NOQUOTA(inode))
2525 return true;
2526 if (f2fs_is_atomic_file(inode))
2527 return true;
2528
2529 /* swap file is migrating in aligned write mode */
2530 if (is_inode_flag_set(inode, FI_ALIGNED_WRITE))
2531 return true;
2532
2533 if (fio) {
2534 if (page_private_gcing(fio->page))
2535 return true;
2536 if (page_private_dummy(fio->page))
2537 return true;
2538 if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
2539 f2fs_is_checkpointed_data(sbi, fio->old_blkaddr)))
2540 return true;
2541 }
2542 return false;
2543}
2544
2545static inline bool need_inplace_update(struct f2fs_io_info *fio)
2546{
2547 struct inode *inode = fio->page->mapping->host;
2548
2549 if (f2fs_should_update_outplace(inode, fio))
2550 return false;
2551
2552 return f2fs_should_update_inplace(inode, fio);
2553}
2554
2555int f2fs_do_write_data_page(struct f2fs_io_info *fio)
2556{
2557 struct page *page = fio->page;
2558 struct inode *inode = page->mapping->host;
2559 struct dnode_of_data dn;
2560 struct extent_info ei = {0, };
2561 struct node_info ni;
2562 bool ipu_force = false;
2563 int err = 0;
2564
2565 set_new_dnode(&dn, inode, NULL, NULL, 0);
2566 if (need_inplace_update(fio) &&
2567 f2fs_lookup_extent_cache(inode, page->index, &ei)) {
2568 fio->old_blkaddr = ei.blk + page->index - ei.fofs;
2569
2570 if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
2571 DATA_GENERIC_ENHANCE))
2572 return -EFSCORRUPTED;
2573
2574 ipu_force = true;
2575 fio->need_lock = LOCK_DONE;
2576 goto got_it;
2577 }
2578
2579 /* Deadlock due to between page->lock and f2fs_lock_op */
2580 if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi))
2581 return -EAGAIN;
2582
2583 err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE);
2584 if (err)
2585 goto out;
2586
2587 fio->old_blkaddr = dn.data_blkaddr;
2588
2589 /* This page is already truncated */
2590 if (fio->old_blkaddr == NULL_ADDR) {
2591 ClearPageUptodate(page);
2592 clear_page_private_gcing(page);
2593 goto out_writepage;
2594 }
2595got_it:
2596 if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2597 !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
2598 DATA_GENERIC_ENHANCE)) {
2599 err = -EFSCORRUPTED;
2600 goto out_writepage;
2601 }
2602 /*
2603 * If current allocation needs SSR,
2604 * it had better in-place writes for updated data.
2605 */
2606 if (ipu_force ||
2607 (__is_valid_data_blkaddr(fio->old_blkaddr) &&
2608 need_inplace_update(fio))) {
2609 err = f2fs_encrypt_one_page(fio);
2610 if (err)
2611 goto out_writepage;
2612
2613 set_page_writeback(page);
2614 ClearPageError(page);
2615 f2fs_put_dnode(&dn);
2616 if (fio->need_lock == LOCK_REQ)
2617 f2fs_unlock_op(fio->sbi);
2618 err = f2fs_inplace_write_data(fio);
2619 if (err) {
2620 if (fscrypt_inode_uses_fs_layer_crypto(inode))
2621 fscrypt_finalize_bounce_page(&fio->encrypted_page);
2622 if (PageWriteback(page))
2623 end_page_writeback(page);
2624 } else {
2625 set_inode_flag(inode, FI_UPDATE_WRITE);
2626 }
2627 trace_f2fs_do_write_data_page(fio->page, IPU);
2628 return err;
2629 }
2630
2631 if (fio->need_lock == LOCK_RETRY) {
2632 if (!f2fs_trylock_op(fio->sbi)) {
2633 err = -EAGAIN;
2634 goto out_writepage;
2635 }
2636 fio->need_lock = LOCK_REQ;
2637 }
2638
2639 err = f2fs_get_node_info(fio->sbi, dn.nid, &ni, false);
2640 if (err)
2641 goto out_writepage;
2642
2643 fio->version = ni.version;
2644
2645 err = f2fs_encrypt_one_page(fio);
2646 if (err)
2647 goto out_writepage;
2648
2649 set_page_writeback(page);
2650 ClearPageError(page);
2651
2652 if (fio->compr_blocks && fio->old_blkaddr == COMPRESS_ADDR)
2653 f2fs_i_compr_blocks_update(inode, fio->compr_blocks - 1, false);
2654
2655 /* LFS mode write path */
2656 f2fs_outplace_write_data(&dn, fio);
2657 trace_f2fs_do_write_data_page(page, OPU);
2658 set_inode_flag(inode, FI_APPEND_WRITE);
2659 if (page->index == 0)
2660 set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN);
2661out_writepage:
2662 f2fs_put_dnode(&dn);
2663out:
2664 if (fio->need_lock == LOCK_REQ)
2665 f2fs_unlock_op(fio->sbi);
2666 return err;
2667}
2668
2669int f2fs_write_single_data_page(struct page *page, int *submitted,
2670 struct bio **bio,
2671 sector_t *last_block,
2672 struct writeback_control *wbc,
2673 enum iostat_type io_type,
2674 int compr_blocks,
2675 bool allow_balance)
2676{
2677 struct inode *inode = page->mapping->host;
2678 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
2679 loff_t i_size = i_size_read(inode);
2680 const pgoff_t end_index = ((unsigned long long)i_size)
2681 >> PAGE_SHIFT;
2682 loff_t psize = (loff_t)(page->index + 1) << PAGE_SHIFT;
2683 unsigned offset = 0;
2684 bool need_balance_fs = false;
2685 int err = 0;
2686 struct f2fs_io_info fio = {
2687 .sbi = sbi,
2688 .ino = inode->i_ino,
2689 .type = DATA,
2690 .op = REQ_OP_WRITE,
2691 .op_flags = wbc_to_write_flags(wbc),
2692 .old_blkaddr = NULL_ADDR,
2693 .page = page,
2694 .encrypted_page = NULL,
2695 .submitted = false,
2696 .compr_blocks = compr_blocks,
2697 .need_lock = LOCK_RETRY,
2698 .io_type = io_type,
2699 .io_wbc = wbc,
2700 .bio = bio,
2701 .last_block = last_block,
2702 };
2703
2704 trace_f2fs_writepage(page, DATA);
2705
2706 /* we should bypass data pages to proceed the kworkder jobs */
2707 if (unlikely(f2fs_cp_error(sbi))) {
2708 mapping_set_error(page->mapping, -EIO);
2709 /*
2710 * don't drop any dirty dentry pages for keeping lastest
2711 * directory structure.
2712 */
2713 if (S_ISDIR(inode->i_mode))
2714 goto redirty_out;
2715 goto out;
2716 }
2717
2718 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
2719 goto redirty_out;
2720
2721 if (page->index < end_index ||
2722 f2fs_verity_in_progress(inode) ||
2723 compr_blocks)
2724 goto write;
2725
2726 /*
2727 * If the offset is out-of-range of file size,
2728 * this page does not have to be written to disk.
2729 */
2730 offset = i_size & (PAGE_SIZE - 1);
2731 if ((page->index >= end_index + 1) || !offset)
2732 goto out;
2733
2734 zero_user_segment(page, offset, PAGE_SIZE);
2735write:
2736 if (f2fs_is_drop_cache(inode))
2737 goto out;
2738 /* we should not write 0'th page having journal header */
2739 if (f2fs_is_volatile_file(inode) && (!page->index ||
2740 (!wbc->for_reclaim &&
2741 f2fs_available_free_memory(sbi, BASE_CHECK))))
2742 goto redirty_out;
2743
2744 /* Dentry/quota blocks are controlled by checkpoint */
2745 if (S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) {
2746 /*
2747 * We need to wait for node_write to avoid block allocation during
2748 * checkpoint. This can only happen to quota writes which can cause
2749 * the below discard race condition.
2750 */
2751 if (IS_NOQUOTA(inode))
2752 down_read(&sbi->node_write);
2753
2754 fio.need_lock = LOCK_DONE;
2755 err = f2fs_do_write_data_page(&fio);
2756
2757 if (IS_NOQUOTA(inode))
2758 up_read(&sbi->node_write);
2759
2760 goto done;
2761 }
2762
2763 if (!wbc->for_reclaim)
2764 need_balance_fs = true;
2765 else if (has_not_enough_free_secs(sbi, 0, 0))
2766 goto redirty_out;
2767 else
2768 set_inode_flag(inode, FI_HOT_DATA);
2769
2770 err = -EAGAIN;
2771 if (f2fs_has_inline_data(inode)) {
2772 err = f2fs_write_inline_data(inode, page);
2773 if (!err)
2774 goto out;
2775 }
2776
2777 if (err == -EAGAIN) {
2778 err = f2fs_do_write_data_page(&fio);
2779 if (err == -EAGAIN) {
2780 fio.need_lock = LOCK_REQ;
2781 err = f2fs_do_write_data_page(&fio);
2782 }
2783 }
2784
2785 if (err) {
2786 file_set_keep_isize(inode);
2787 } else {
2788 spin_lock(&F2FS_I(inode)->i_size_lock);
2789 if (F2FS_I(inode)->last_disk_size < psize)
2790 F2FS_I(inode)->last_disk_size = psize;
2791 spin_unlock(&F2FS_I(inode)->i_size_lock);
2792 }
2793
2794done:
2795 if (err && err != -ENOENT)
2796 goto redirty_out;
2797
2798out:
2799 inode_dec_dirty_pages(inode);
2800 if (err) {
2801 ClearPageUptodate(page);
2802 clear_page_private_gcing(page);
2803 }
2804
2805 if (wbc->for_reclaim) {
2806 f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA);
2807 clear_inode_flag(inode, FI_HOT_DATA);
2808 f2fs_remove_dirty_inode(inode);
2809 submitted = NULL;
2810 }
2811 unlock_page(page);
2812 if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
2813 !F2FS_I(inode)->cp_task && allow_balance)
2814 f2fs_balance_fs(sbi, need_balance_fs);
2815
2816 if (unlikely(f2fs_cp_error(sbi))) {
2817 f2fs_submit_merged_write(sbi, DATA);
2818 f2fs_submit_merged_ipu_write(sbi, bio, NULL);
2819 submitted = NULL;
2820 }
2821
2822 if (submitted)
2823 *submitted = fio.submitted ? 1 : 0;
2824
2825 return 0;
2826
2827redirty_out:
2828 redirty_page_for_writepage(wbc, page);
2829 /*
2830 * pageout() in MM traslates EAGAIN, so calls handle_write_error()
2831 * -> mapping_set_error() -> set_bit(AS_EIO, ...).
2832 * file_write_and_wait_range() will see EIO error, which is critical
2833 * to return value of fsync() followed by atomic_write failure to user.
2834 */
2835 if (!err || wbc->for_reclaim)
2836 return AOP_WRITEPAGE_ACTIVATE;
2837 unlock_page(page);
2838 return err;
2839}
2840
2841static int f2fs_write_data_page(struct page *page,
2842 struct writeback_control *wbc)
2843{
2844#ifdef CONFIG_F2FS_FS_COMPRESSION
2845 struct inode *inode = page->mapping->host;
2846
2847 if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
2848 goto out;
2849
2850 if (f2fs_compressed_file(inode)) {
2851 if (f2fs_is_compressed_cluster(inode, page->index)) {
2852 redirty_page_for_writepage(wbc, page);
2853 return AOP_WRITEPAGE_ACTIVATE;
2854 }
2855 }
2856out:
2857#endif
2858
2859 return f2fs_write_single_data_page(page, NULL, NULL, NULL,
2860 wbc, FS_DATA_IO, 0, true);
2861}
2862
2863/*
2864 * This function was copied from write_cche_pages from mm/page-writeback.c.
2865 * The major change is making write step of cold data page separately from
2866 * warm/hot data page.
2867 */
2868static int f2fs_write_cache_pages(struct address_space *mapping,
2869 struct writeback_control *wbc,
2870 enum iostat_type io_type)
2871{
2872 int ret = 0;
2873 int done = 0, retry = 0;
2874 struct pagevec pvec;
2875 struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
2876 struct bio *bio = NULL;
2877 sector_t last_block;
2878#ifdef CONFIG_F2FS_FS_COMPRESSION
2879 struct inode *inode = mapping->host;
2880 struct compress_ctx cc = {
2881 .inode = inode,
2882 .log_cluster_size = F2FS_I(inode)->i_log_cluster_size,
2883 .cluster_size = F2FS_I(inode)->i_cluster_size,
2884 .cluster_idx = NULL_CLUSTER,
2885 .rpages = NULL,
2886 .nr_rpages = 0,
2887 .cpages = NULL,
2888 .valid_nr_cpages = 0,
2889 .rbuf = NULL,
2890 .cbuf = NULL,
2891 .rlen = PAGE_SIZE * F2FS_I(inode)->i_cluster_size,
2892 .private = NULL,
2893 };
2894#endif
2895 int nr_pages;
2896 pgoff_t index;
2897 pgoff_t end; /* Inclusive */
2898 pgoff_t done_index;
2899 int range_whole = 0;
2900 xa_mark_t tag;
2901 int nwritten = 0;
2902 int submitted = 0;
2903 int i;
2904
2905 pagevec_init(&pvec);
2906
2907 if (get_dirty_pages(mapping->host) <=
2908 SM_I(F2FS_M_SB(mapping))->min_hot_blocks)
2909 set_inode_flag(mapping->host, FI_HOT_DATA);
2910 else
2911 clear_inode_flag(mapping->host, FI_HOT_DATA);
2912
2913 if (wbc->range_cyclic) {
2914 index = mapping->writeback_index; /* prev offset */
2915 end = -1;
2916 } else {
2917 index = wbc->range_start >> PAGE_SHIFT;
2918 end = wbc->range_end >> PAGE_SHIFT;
2919 if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX)
2920 range_whole = 1;
2921 }
2922 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2923 tag = PAGECACHE_TAG_TOWRITE;
2924 else
2925 tag = PAGECACHE_TAG_DIRTY;
2926retry:
2927 retry = 0;
2928 if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages)
2929 tag_pages_for_writeback(mapping, index, end);
2930 done_index = index;
2931 while (!done && !retry && (index <= end)) {
2932 nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end,
2933 tag);
2934 if (nr_pages == 0)
2935 break;
2936
2937 for (i = 0; i < nr_pages; i++) {
2938 struct page *page = pvec.pages[i];
2939 bool need_readd;
2940readd:
2941 need_readd = false;
2942#ifdef CONFIG_F2FS_FS_COMPRESSION
2943 if (f2fs_compressed_file(inode)) {
2944 void *fsdata = NULL;
2945 struct page *pagep;
2946 int ret2;
2947
2948 ret = f2fs_init_compress_ctx(&cc);
2949 if (ret) {
2950 done = 1;
2951 break;
2952 }
2953
2954 if (!f2fs_cluster_can_merge_page(&cc,
2955 page->index)) {
2956 ret = f2fs_write_multi_pages(&cc,
2957 &submitted, wbc, io_type);
2958 if (!ret)
2959 need_readd = true;
2960 goto result;
2961 }
2962
2963 if (unlikely(f2fs_cp_error(sbi)))
2964 goto lock_page;
2965
2966 if (!f2fs_cluster_is_empty(&cc))
2967 goto lock_page;
2968
2969 ret2 = f2fs_prepare_compress_overwrite(
2970 inode, &pagep,
2971 page->index, &fsdata);
2972 if (ret2 < 0) {
2973 ret = ret2;
2974 done = 1;
2975 break;
2976 } else if (ret2 &&
2977 (!f2fs_compress_write_end(inode,
2978 fsdata, page->index, 1) ||
2979 !f2fs_all_cluster_page_loaded(&cc,
2980 &pvec, i, nr_pages))) {
2981 retry = 1;
2982 break;
2983 }
2984 }
2985#endif
2986 /* give a priority to WB_SYNC threads */
2987 if (atomic_read(&sbi->wb_sync_req[DATA]) &&
2988 wbc->sync_mode == WB_SYNC_NONE) {
2989 done = 1;
2990 break;
2991 }
2992#ifdef CONFIG_F2FS_FS_COMPRESSION
2993lock_page:
2994#endif
2995 done_index = page->index;
2996retry_write:
2997 lock_page(page);
2998
2999 if (unlikely(page->mapping != mapping)) {
3000continue_unlock:
3001 unlock_page(page);
3002 continue;
3003 }
3004
3005 if (!PageDirty(page)) {
3006 /* someone wrote it for us */
3007 goto continue_unlock;
3008 }
3009
3010 if (PageWriteback(page)) {
3011 if (wbc->sync_mode != WB_SYNC_NONE)
3012 f2fs_wait_on_page_writeback(page,
3013 DATA, true, true);
3014 else
3015 goto continue_unlock;
3016 }
3017
3018 if (!clear_page_dirty_for_io(page))
3019 goto continue_unlock;
3020
3021#ifdef CONFIG_F2FS_FS_COMPRESSION
3022 if (f2fs_compressed_file(inode)) {
3023 get_page(page);
3024 f2fs_compress_ctx_add_page(&cc, page);
3025 continue;
3026 }
3027#endif
3028 ret = f2fs_write_single_data_page(page, &submitted,
3029 &bio, &last_block, wbc, io_type,
3030 0, true);
3031 if (ret == AOP_WRITEPAGE_ACTIVATE)
3032 unlock_page(page);
3033#ifdef CONFIG_F2FS_FS_COMPRESSION
3034result:
3035#endif
3036 nwritten += submitted;
3037 wbc->nr_to_write -= submitted;
3038
3039 if (unlikely(ret)) {
3040 /*
3041 * keep nr_to_write, since vfs uses this to
3042 * get # of written pages.
3043 */
3044 if (ret == AOP_WRITEPAGE_ACTIVATE) {
3045 ret = 0;
3046 goto next;
3047 } else if (ret == -EAGAIN) {
3048 ret = 0;
3049 if (wbc->sync_mode == WB_SYNC_ALL) {
3050 cond_resched();
3051 congestion_wait(BLK_RW_ASYNC,
3052 DEFAULT_IO_TIMEOUT);
3053 goto retry_write;
3054 }
3055 goto next;
3056 }
3057 done_index = page->index + 1;
3058 done = 1;
3059 break;
3060 }
3061
3062 if (wbc->nr_to_write <= 0 &&
3063 wbc->sync_mode == WB_SYNC_NONE) {
3064 done = 1;
3065 break;
3066 }
3067next:
3068 if (need_readd)
3069 goto readd;
3070 }
3071 pagevec_release(&pvec);
3072 cond_resched();
3073 }
3074#ifdef CONFIG_F2FS_FS_COMPRESSION
3075 /* flush remained pages in compress cluster */
3076 if (f2fs_compressed_file(inode) && !f2fs_cluster_is_empty(&cc)) {
3077 ret = f2fs_write_multi_pages(&cc, &submitted, wbc, io_type);
3078 nwritten += submitted;
3079 wbc->nr_to_write -= submitted;
3080 if (ret) {
3081 done = 1;
3082 retry = 0;
3083 }
3084 }
3085 if (f2fs_compressed_file(inode))
3086 f2fs_destroy_compress_ctx(&cc, false);
3087#endif
3088 if (retry) {
3089 index = 0;
3090 end = -1;
3091 goto retry;
3092 }
3093 if (wbc->range_cyclic && !done)
3094 done_index = 0;
3095 if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
3096 mapping->writeback_index = done_index;
3097
3098 if (nwritten)
3099 f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
3100 NULL, 0, DATA);
3101 /* submit cached bio of IPU write */
3102 if (bio)
3103 f2fs_submit_merged_ipu_write(sbi, &bio, NULL);
3104
3105 return ret;
3106}
3107
3108static inline bool __should_serialize_io(struct inode *inode,
3109 struct writeback_control *wbc)
3110{
3111 /* to avoid deadlock in path of data flush */
3112 if (F2FS_I(inode)->cp_task)
3113 return false;
3114
3115 if (!S_ISREG(inode->i_mode))
3116 return false;
3117 if (IS_NOQUOTA(inode))
3118 return false;
3119
3120 if (f2fs_need_compress_data(inode))
3121 return true;
3122 if (wbc->sync_mode != WB_SYNC_ALL)
3123 return true;
3124 if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
3125 return true;
3126 return false;
3127}
3128
3129static int __f2fs_write_data_pages(struct address_space *mapping,
3130 struct writeback_control *wbc,
3131 enum iostat_type io_type)
3132{
3133 struct inode *inode = mapping->host;
3134 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3135 struct blk_plug plug;
3136 int ret;
3137 bool locked = false;
3138
3139 /* deal with chardevs and other special file */
3140 if (!mapping->a_ops->writepage)
3141 return 0;
3142
3143 /* skip writing if there is no dirty page in this inode */
3144 if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE)
3145 return 0;
3146
3147 /* during POR, we don't need to trigger writepage at all. */
3148 if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING)))
3149 goto skip_write;
3150
3151 if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) &&
3152 wbc->sync_mode == WB_SYNC_NONE &&
3153 get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) &&
3154 f2fs_available_free_memory(sbi, DIRTY_DENTS))
3155 goto skip_write;
3156
3157 /* skip writing during file defragment */
3158 if (is_inode_flag_set(inode, FI_DO_DEFRAG))
3159 goto skip_write;
3160
3161 trace_f2fs_writepages(mapping->host, wbc, DATA);
3162
3163 /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */
3164 if (wbc->sync_mode == WB_SYNC_ALL)
3165 atomic_inc(&sbi->wb_sync_req[DATA]);
3166 else if (atomic_read(&sbi->wb_sync_req[DATA]))
3167 goto skip_write;
3168
3169 if (__should_serialize_io(inode, wbc)) {
3170 mutex_lock(&sbi->writepages);
3171 locked = true;
3172 }
3173
3174 blk_start_plug(&plug);
3175 ret = f2fs_write_cache_pages(mapping, wbc, io_type);
3176 blk_finish_plug(&plug);
3177
3178 if (locked)
3179 mutex_unlock(&sbi->writepages);
3180
3181 if (wbc->sync_mode == WB_SYNC_ALL)
3182 atomic_dec(&sbi->wb_sync_req[DATA]);
3183 /*
3184 * if some pages were truncated, we cannot guarantee its mapping->host
3185 * to detect pending bios.
3186 */
3187
3188 f2fs_remove_dirty_inode(inode);
3189 return ret;
3190
3191skip_write:
3192 wbc->pages_skipped += get_dirty_pages(inode);
3193 trace_f2fs_writepages(mapping->host, wbc, DATA);
3194 return 0;
3195}
3196
3197static int f2fs_write_data_pages(struct address_space *mapping,
3198 struct writeback_control *wbc)
3199{
3200 struct inode *inode = mapping->host;
3201
3202 return __f2fs_write_data_pages(mapping, wbc,
3203 F2FS_I(inode)->cp_task == current ?
3204 FS_CP_DATA_IO : FS_DATA_IO);
3205}
3206
3207void f2fs_write_failed(struct inode *inode, loff_t to)
3208{
3209 loff_t i_size = i_size_read(inode);
3210
3211 if (IS_NOQUOTA(inode))
3212 return;
3213
3214 /* In the fs-verity case, f2fs_end_enable_verity() does the truncate */
3215 if (to > i_size && !f2fs_verity_in_progress(inode)) {
3216 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3217 filemap_invalidate_lock(inode->i_mapping);
3218
3219 truncate_pagecache(inode, i_size);
3220 f2fs_truncate_blocks(inode, i_size, true);
3221
3222 filemap_invalidate_unlock(inode->i_mapping);
3223 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3224 }
3225}
3226
3227static int prepare_write_begin(struct f2fs_sb_info *sbi,
3228 struct page *page, loff_t pos, unsigned len,
3229 block_t *blk_addr, bool *node_changed)
3230{
3231 struct inode *inode = page->mapping->host;
3232 pgoff_t index = page->index;
3233 struct dnode_of_data dn;
3234 struct page *ipage;
3235 bool locked = false;
3236 struct extent_info ei = {0, };
3237 int err = 0;
3238 int flag;
3239
3240 /*
3241 * If a whole page is being written and we already preallocated all the
3242 * blocks, then there is no need to get a block address now.
3243 */
3244 if (len == PAGE_SIZE && is_inode_flag_set(inode, FI_PREALLOCATED_ALL))
3245 return 0;
3246
3247 /* f2fs_lock_op avoids race between write CP and convert_inline_page */
3248 if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode))
3249 flag = F2FS_GET_BLOCK_DEFAULT;
3250 else
3251 flag = F2FS_GET_BLOCK_PRE_AIO;
3252
3253 if (f2fs_has_inline_data(inode) ||
3254 (pos & PAGE_MASK) >= i_size_read(inode)) {
3255 f2fs_do_map_lock(sbi, flag, true);
3256 locked = true;
3257 }
3258
3259restart:
3260 /* check inline_data */
3261 ipage = f2fs_get_node_page(sbi, inode->i_ino);
3262 if (IS_ERR(ipage)) {
3263 err = PTR_ERR(ipage);
3264 goto unlock_out;
3265 }
3266
3267 set_new_dnode(&dn, inode, ipage, ipage, 0);
3268
3269 if (f2fs_has_inline_data(inode)) {
3270 if (pos + len <= MAX_INLINE_DATA(inode)) {
3271 f2fs_do_read_inline_data(page, ipage);
3272 set_inode_flag(inode, FI_DATA_EXIST);
3273 if (inode->i_nlink)
3274 set_page_private_inline(ipage);
3275 } else {
3276 err = f2fs_convert_inline_page(&dn, page);
3277 if (err)
3278 goto out;
3279 if (dn.data_blkaddr == NULL_ADDR)
3280 err = f2fs_get_block(&dn, index);
3281 }
3282 } else if (locked) {
3283 err = f2fs_get_block(&dn, index);
3284 } else {
3285 if (f2fs_lookup_extent_cache(inode, index, &ei)) {
3286 dn.data_blkaddr = ei.blk + index - ei.fofs;
3287 } else {
3288 /* hole case */
3289 err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE);
3290 if (err || dn.data_blkaddr == NULL_ADDR) {
3291 f2fs_put_dnode(&dn);
3292 f2fs_do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO,
3293 true);
3294 WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO);
3295 locked = true;
3296 goto restart;
3297 }
3298 }
3299 }
3300
3301 /* convert_inline_page can make node_changed */
3302 *blk_addr = dn.data_blkaddr;
3303 *node_changed = dn.node_changed;
3304out:
3305 f2fs_put_dnode(&dn);
3306unlock_out:
3307 if (locked)
3308 f2fs_do_map_lock(sbi, flag, false);
3309 return err;
3310}
3311
3312static int f2fs_write_begin(struct file *file, struct address_space *mapping,
3313 loff_t pos, unsigned len, unsigned flags,
3314 struct page **pagep, void **fsdata)
3315{
3316 struct inode *inode = mapping->host;
3317 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3318 struct page *page = NULL;
3319 pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT;
3320 bool need_balance = false, drop_atomic = false;
3321 block_t blkaddr = NULL_ADDR;
3322 int err = 0;
3323
3324 trace_f2fs_write_begin(inode, pos, len, flags);
3325
3326 if (!f2fs_is_checkpoint_ready(sbi)) {
3327 err = -ENOSPC;
3328 goto fail;
3329 }
3330
3331 if ((f2fs_is_atomic_file(inode) &&
3332 !f2fs_available_free_memory(sbi, INMEM_PAGES)) ||
3333 is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) {
3334 err = -ENOMEM;
3335 drop_atomic = true;
3336 goto fail;
3337 }
3338
3339 /*
3340 * We should check this at this moment to avoid deadlock on inode page
3341 * and #0 page. The locking rule for inline_data conversion should be:
3342 * lock_page(page #0) -> lock_page(inode_page)
3343 */
3344 if (index != 0) {
3345 err = f2fs_convert_inline_inode(inode);
3346 if (err)
3347 goto fail;
3348 }
3349
3350#ifdef CONFIG_F2FS_FS_COMPRESSION
3351 if (f2fs_compressed_file(inode)) {
3352 int ret;
3353
3354 *fsdata = NULL;
3355
3356 if (len == PAGE_SIZE)
3357 goto repeat;
3358
3359 ret = f2fs_prepare_compress_overwrite(inode, pagep,
3360 index, fsdata);
3361 if (ret < 0) {
3362 err = ret;
3363 goto fail;
3364 } else if (ret) {
3365 return 0;
3366 }
3367 }
3368#endif
3369
3370repeat:
3371 /*
3372 * Do not use grab_cache_page_write_begin() to avoid deadlock due to
3373 * wait_for_stable_page. Will wait that below with our IO control.
3374 */
3375 page = f2fs_pagecache_get_page(mapping, index,
3376 FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS);
3377 if (!page) {
3378 err = -ENOMEM;
3379 goto fail;
3380 }
3381
3382 /* TODO: cluster can be compressed due to race with .writepage */
3383
3384 *pagep = page;
3385
3386 err = prepare_write_begin(sbi, page, pos, len,
3387 &blkaddr, &need_balance);
3388 if (err)
3389 goto fail;
3390
3391 if (need_balance && !IS_NOQUOTA(inode) &&
3392 has_not_enough_free_secs(sbi, 0, 0)) {
3393 unlock_page(page);
3394 f2fs_balance_fs(sbi, true);
3395 lock_page(page);
3396 if (page->mapping != mapping) {
3397 /* The page got truncated from under us */
3398 f2fs_put_page(page, 1);
3399 goto repeat;
3400 }
3401 }
3402
3403 f2fs_wait_on_page_writeback(page, DATA, false, true);
3404
3405 if (len == PAGE_SIZE || PageUptodate(page))
3406 return 0;
3407
3408 if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode) &&
3409 !f2fs_verity_in_progress(inode)) {
3410 zero_user_segment(page, len, PAGE_SIZE);
3411 return 0;
3412 }
3413
3414 if (blkaddr == NEW_ADDR) {
3415 zero_user_segment(page, 0, PAGE_SIZE);
3416 SetPageUptodate(page);
3417 } else {
3418 if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
3419 DATA_GENERIC_ENHANCE_READ)) {
3420 err = -EFSCORRUPTED;
3421 goto fail;
3422 }
3423 err = f2fs_submit_page_read(inode, page, blkaddr, 0, true);
3424 if (err)
3425 goto fail;
3426
3427 lock_page(page);
3428 if (unlikely(page->mapping != mapping)) {
3429 f2fs_put_page(page, 1);
3430 goto repeat;
3431 }
3432 if (unlikely(!PageUptodate(page))) {
3433 err = -EIO;
3434 goto fail;
3435 }
3436 }
3437 return 0;
3438
3439fail:
3440 f2fs_put_page(page, 1);
3441 f2fs_write_failed(inode, pos + len);
3442 if (drop_atomic)
3443 f2fs_drop_inmem_pages_all(sbi, false);
3444 return err;
3445}
3446
3447static int f2fs_write_end(struct file *file,
3448 struct address_space *mapping,
3449 loff_t pos, unsigned len, unsigned copied,
3450 struct page *page, void *fsdata)
3451{
3452 struct inode *inode = page->mapping->host;
3453
3454 trace_f2fs_write_end(inode, pos, len, copied);
3455
3456 /*
3457 * This should be come from len == PAGE_SIZE, and we expect copied
3458 * should be PAGE_SIZE. Otherwise, we treat it with zero copied and
3459 * let generic_perform_write() try to copy data again through copied=0.
3460 */
3461 if (!PageUptodate(page)) {
3462 if (unlikely(copied != len))
3463 copied = 0;
3464 else
3465 SetPageUptodate(page);
3466 }
3467
3468#ifdef CONFIG_F2FS_FS_COMPRESSION
3469 /* overwrite compressed file */
3470 if (f2fs_compressed_file(inode) && fsdata) {
3471 f2fs_compress_write_end(inode, fsdata, page->index, copied);
3472 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3473
3474 if (pos + copied > i_size_read(inode) &&
3475 !f2fs_verity_in_progress(inode))
3476 f2fs_i_size_write(inode, pos + copied);
3477 return copied;
3478 }
3479#endif
3480
3481 if (!copied)
3482 goto unlock_out;
3483
3484 set_page_dirty(page);
3485
3486 if (pos + copied > i_size_read(inode) &&
3487 !f2fs_verity_in_progress(inode))
3488 f2fs_i_size_write(inode, pos + copied);
3489unlock_out:
3490 f2fs_put_page(page, 1);
3491 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3492 return copied;
3493}
3494
3495void f2fs_invalidate_page(struct page *page, unsigned int offset,
3496 unsigned int length)
3497{
3498 struct inode *inode = page->mapping->host;
3499 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3500
3501 if (inode->i_ino >= F2FS_ROOT_INO(sbi) &&
3502 (offset % PAGE_SIZE || length != PAGE_SIZE))
3503 return;
3504
3505 if (PageDirty(page)) {
3506 if (inode->i_ino == F2FS_META_INO(sbi)) {
3507 dec_page_count(sbi, F2FS_DIRTY_META);
3508 } else if (inode->i_ino == F2FS_NODE_INO(sbi)) {
3509 dec_page_count(sbi, F2FS_DIRTY_NODES);
3510 } else {
3511 inode_dec_dirty_pages(inode);
3512 f2fs_remove_dirty_inode(inode);
3513 }
3514 }
3515
3516 clear_page_private_gcing(page);
3517
3518 if (test_opt(sbi, COMPRESS_CACHE) &&
3519 inode->i_ino == F2FS_COMPRESS_INO(sbi))
3520 clear_page_private_data(page);
3521
3522 if (page_private_atomic(page))
3523 return f2fs_drop_inmem_page(inode, page);
3524
3525 detach_page_private(page);
3526 set_page_private(page, 0);
3527}
3528
3529int f2fs_release_page(struct page *page, gfp_t wait)
3530{
3531 /* If this is dirty page, keep PagePrivate */
3532 if (PageDirty(page))
3533 return 0;
3534
3535 /* This is atomic written page, keep Private */
3536 if (page_private_atomic(page))
3537 return 0;
3538
3539 if (test_opt(F2FS_P_SB(page), COMPRESS_CACHE)) {
3540 struct inode *inode = page->mapping->host;
3541
3542 if (inode->i_ino == F2FS_COMPRESS_INO(F2FS_I_SB(inode)))
3543 clear_page_private_data(page);
3544 }
3545
3546 clear_page_private_gcing(page);
3547
3548 detach_page_private(page);
3549 set_page_private(page, 0);
3550 return 1;
3551}
3552
3553static int f2fs_set_data_page_dirty(struct page *page)
3554{
3555 struct inode *inode = page_file_mapping(page)->host;
3556
3557 trace_f2fs_set_page_dirty(page, DATA);
3558
3559 if (!PageUptodate(page))
3560 SetPageUptodate(page);
3561 if (PageSwapCache(page))
3562 return __set_page_dirty_nobuffers(page);
3563
3564 if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
3565 if (!page_private_atomic(page)) {
3566 f2fs_register_inmem_page(inode, page);
3567 return 1;
3568 }
3569 /*
3570 * Previously, this page has been registered, we just
3571 * return here.
3572 */
3573 return 0;
3574 }
3575
3576 if (!PageDirty(page)) {
3577 __set_page_dirty_nobuffers(page);
3578 f2fs_update_dirty_page(inode, page);
3579 return 1;
3580 }
3581 return 0;
3582}
3583
3584
3585static sector_t f2fs_bmap_compress(struct inode *inode, sector_t block)
3586{
3587#ifdef CONFIG_F2FS_FS_COMPRESSION
3588 struct dnode_of_data dn;
3589 sector_t start_idx, blknr = 0;
3590 int ret;
3591
3592 start_idx = round_down(block, F2FS_I(inode)->i_cluster_size);
3593
3594 set_new_dnode(&dn, inode, NULL, NULL, 0);
3595 ret = f2fs_get_dnode_of_data(&dn, start_idx, LOOKUP_NODE);
3596 if (ret)
3597 return 0;
3598
3599 if (dn.data_blkaddr != COMPRESS_ADDR) {
3600 dn.ofs_in_node += block - start_idx;
3601 blknr = f2fs_data_blkaddr(&dn);
3602 if (!__is_valid_data_blkaddr(blknr))
3603 blknr = 0;
3604 }
3605
3606 f2fs_put_dnode(&dn);
3607 return blknr;
3608#else
3609 return 0;
3610#endif
3611}
3612
3613
3614static sector_t f2fs_bmap(struct address_space *mapping, sector_t block)
3615{
3616 struct inode *inode = mapping->host;
3617 sector_t blknr = 0;
3618
3619 if (f2fs_has_inline_data(inode))
3620 goto out;
3621
3622 /* make sure allocating whole blocks */
3623 if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY))
3624 filemap_write_and_wait(mapping);
3625
3626 /* Block number less than F2FS MAX BLOCKS */
3627 if (unlikely(block >= max_file_blocks(inode)))
3628 goto out;
3629
3630 if (f2fs_compressed_file(inode)) {
3631 blknr = f2fs_bmap_compress(inode, block);
3632 } else {
3633 struct f2fs_map_blocks map;
3634
3635 memset(&map, 0, sizeof(map));
3636 map.m_lblk = block;
3637 map.m_len = 1;
3638 map.m_next_pgofs = NULL;
3639 map.m_seg_type = NO_CHECK_TYPE;
3640
3641 if (!f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_BMAP))
3642 blknr = map.m_pblk;
3643 }
3644out:
3645 trace_f2fs_bmap(inode, block, blknr);
3646 return blknr;
3647}
3648
3649#ifdef CONFIG_MIGRATION
3650#include <linux/migrate.h>
3651
3652int f2fs_migrate_page(struct address_space *mapping,
3653 struct page *newpage, struct page *page, enum migrate_mode mode)
3654{
3655 int rc, extra_count;
3656 struct f2fs_inode_info *fi = F2FS_I(mapping->host);
3657 bool atomic_written = page_private_atomic(page);
3658
3659 BUG_ON(PageWriteback(page));
3660
3661 /* migrating an atomic written page is safe with the inmem_lock hold */
3662 if (atomic_written) {
3663 if (mode != MIGRATE_SYNC)
3664 return -EBUSY;
3665 if (!mutex_trylock(&fi->inmem_lock))
3666 return -EAGAIN;
3667 }
3668
3669 /* one extra reference was held for atomic_write page */
3670 extra_count = atomic_written ? 1 : 0;
3671 rc = migrate_page_move_mapping(mapping, newpage,
3672 page, extra_count);
3673 if (rc != MIGRATEPAGE_SUCCESS) {
3674 if (atomic_written)
3675 mutex_unlock(&fi->inmem_lock);
3676 return rc;
3677 }
3678
3679 if (atomic_written) {
3680 struct inmem_pages *cur;
3681
3682 list_for_each_entry(cur, &fi->inmem_pages, list)
3683 if (cur->page == page) {
3684 cur->page = newpage;
3685 break;
3686 }
3687 mutex_unlock(&fi->inmem_lock);
3688 put_page(page);
3689 get_page(newpage);
3690 }
3691
3692 /* guarantee to start from no stale private field */
3693 set_page_private(newpage, 0);
3694 if (PagePrivate(page)) {
3695 set_page_private(newpage, page_private(page));
3696 SetPagePrivate(newpage);
3697 get_page(newpage);
3698
3699 set_page_private(page, 0);
3700 ClearPagePrivate(page);
3701 put_page(page);
3702 }
3703
3704 if (mode != MIGRATE_SYNC_NO_COPY)
3705 migrate_page_copy(newpage, page);
3706 else
3707 migrate_page_states(newpage, page);
3708
3709 return MIGRATEPAGE_SUCCESS;
3710}
3711#endif
3712
3713#ifdef CONFIG_SWAP
3714static int f2fs_migrate_blocks(struct inode *inode, block_t start_blk,
3715 unsigned int blkcnt)
3716{
3717 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3718 unsigned int blkofs;
3719 unsigned int blk_per_sec = BLKS_PER_SEC(sbi);
3720 unsigned int secidx = start_blk / blk_per_sec;
3721 unsigned int end_sec = secidx + blkcnt / blk_per_sec;
3722 int ret = 0;
3723
3724 down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3725 filemap_invalidate_lock(inode->i_mapping);
3726
3727 set_inode_flag(inode, FI_ALIGNED_WRITE);
3728
3729 for (; secidx < end_sec; secidx++) {
3730 down_write(&sbi->pin_sem);
3731
3732 f2fs_lock_op(sbi);
3733 f2fs_allocate_new_section(sbi, CURSEG_COLD_DATA_PINNED, false);
3734 f2fs_unlock_op(sbi);
3735
3736 set_inode_flag(inode, FI_DO_DEFRAG);
3737
3738 for (blkofs = 0; blkofs < blk_per_sec; blkofs++) {
3739 struct page *page;
3740 unsigned int blkidx = secidx * blk_per_sec + blkofs;
3741
3742 page = f2fs_get_lock_data_page(inode, blkidx, true);
3743 if (IS_ERR(page)) {
3744 up_write(&sbi->pin_sem);
3745 ret = PTR_ERR(page);
3746 goto done;
3747 }
3748
3749 set_page_dirty(page);
3750 f2fs_put_page(page, 1);
3751 }
3752
3753 clear_inode_flag(inode, FI_DO_DEFRAG);
3754
3755 ret = filemap_fdatawrite(inode->i_mapping);
3756
3757 up_write(&sbi->pin_sem);
3758
3759 if (ret)
3760 break;
3761 }
3762
3763done:
3764 clear_inode_flag(inode, FI_DO_DEFRAG);
3765 clear_inode_flag(inode, FI_ALIGNED_WRITE);
3766
3767 filemap_invalidate_unlock(inode->i_mapping);
3768 up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
3769
3770 return ret;
3771}
3772
3773static int check_swap_activate(struct swap_info_struct *sis,
3774 struct file *swap_file, sector_t *span)
3775{
3776 struct address_space *mapping = swap_file->f_mapping;
3777 struct inode *inode = mapping->host;
3778 struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
3779 sector_t cur_lblock;
3780 sector_t last_lblock;
3781 sector_t pblock;
3782 sector_t lowest_pblock = -1;
3783 sector_t highest_pblock = 0;
3784 int nr_extents = 0;
3785 unsigned long nr_pblocks;
3786 unsigned int blks_per_sec = BLKS_PER_SEC(sbi);
3787 unsigned int sec_blks_mask = BLKS_PER_SEC(sbi) - 1;
3788 unsigned int not_aligned = 0;
3789 int ret = 0;
3790
3791 /*
3792 * Map all the blocks into the extent list. This code doesn't try
3793 * to be very smart.
3794 */
3795 cur_lblock = 0;
3796 last_lblock = bytes_to_blks(inode, i_size_read(inode));
3797
3798 while (cur_lblock < last_lblock && cur_lblock < sis->max) {
3799 struct f2fs_map_blocks map;
3800retry:
3801 cond_resched();
3802
3803 memset(&map, 0, sizeof(map));
3804 map.m_lblk = cur_lblock;
3805 map.m_len = last_lblock - cur_lblock;
3806 map.m_next_pgofs = NULL;
3807 map.m_next_extent = NULL;
3808 map.m_seg_type = NO_CHECK_TYPE;
3809 map.m_may_create = false;
3810
3811 ret = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_FIEMAP);
3812 if (ret)
3813 goto out;
3814
3815 /* hole */
3816 if (!(map.m_flags & F2FS_MAP_FLAGS)) {
3817 f2fs_err(sbi, "Swapfile has holes");
3818 ret = -EINVAL;
3819 goto out;
3820 }
3821
3822 pblock = map.m_pblk;
3823 nr_pblocks = map.m_len;
3824
3825 if ((pblock - SM_I(sbi)->main_blkaddr) & sec_blks_mask ||
3826 nr_pblocks & sec_blks_mask) {
3827 not_aligned++;
3828
3829 nr_pblocks = roundup(nr_pblocks, blks_per_sec);
3830 if (cur_lblock + nr_pblocks > sis->max)
3831 nr_pblocks -= blks_per_sec;
3832
3833 if (!nr_pblocks) {
3834 /* this extent is last one */
3835 nr_pblocks = map.m_len;
3836 f2fs_warn(sbi, "Swapfile: last extent is not aligned to section");
3837 goto next;
3838 }
3839
3840 ret = f2fs_migrate_blocks(inode, cur_lblock,
3841 nr_pblocks);
3842 if (ret)
3843 goto out;
3844 goto retry;
3845 }
3846next:
3847 if (cur_lblock + nr_pblocks >= sis->max)
3848 nr_pblocks = sis->max - cur_lblock;
3849
3850 if (cur_lblock) { /* exclude the header page */
3851 if (pblock < lowest_pblock)
3852 lowest_pblock = pblock;
3853 if (pblock + nr_pblocks - 1 > highest_pblock)
3854 highest_pblock = pblock + nr_pblocks - 1;
3855 }
3856
3857 /*
3858 * We found a PAGE_SIZE-length, PAGE_SIZE-aligned run of blocks
3859 */
3860 ret = add_swap_extent(sis, cur_lblock, nr_pblocks, pblock);
3861 if (ret < 0)
3862 goto out;
3863 nr_extents += ret;
3864 cur_lblock += nr_pblocks;
3865 }
3866 ret = nr_extents;
3867 *span = 1 + highest_pblock - lowest_pblock;
3868 if (cur_lblock == 0)
3869 cur_lblock = 1; /* force Empty message */
3870 sis->max = cur_lblock;
3871 sis->pages = cur_lblock - 1;
3872 sis->highest_bit = cur_lblock - 1;
3873out:
3874 if (not_aligned)
3875 f2fs_warn(sbi, "Swapfile (%u) is not align to section: 1) creat(), 2) ioctl(F2FS_IOC_SET_PIN_FILE), 3) fallocate(%u * N)",
3876 not_aligned, blks_per_sec * F2FS_BLKSIZE);
3877 return ret;
3878}
3879
3880static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3881 sector_t *span)
3882{
3883 struct inode *inode = file_inode(file);
3884 int ret;
3885
3886 if (!S_ISREG(inode->i_mode))
3887 return -EINVAL;
3888
3889 if (f2fs_readonly(F2FS_I_SB(inode)->sb))
3890 return -EROFS;
3891
3892 if (f2fs_lfs_mode(F2FS_I_SB(inode))) {
3893 f2fs_err(F2FS_I_SB(inode),
3894 "Swapfile not supported in LFS mode");
3895 return -EINVAL;
3896 }
3897
3898 ret = f2fs_convert_inline_inode(inode);
3899 if (ret)
3900 return ret;
3901
3902 if (!f2fs_disable_compressed_file(inode))
3903 return -EINVAL;
3904
3905 f2fs_precache_extents(inode);
3906
3907 ret = check_swap_activate(sis, file, span);
3908 if (ret < 0)
3909 return ret;
3910
3911 set_inode_flag(inode, FI_PIN_FILE);
3912 f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
3913 return ret;
3914}
3915
3916static void f2fs_swap_deactivate(struct file *file)
3917{
3918 struct inode *inode = file_inode(file);
3919
3920 clear_inode_flag(inode, FI_PIN_FILE);
3921}
3922#else
3923static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
3924 sector_t *span)
3925{
3926 return -EOPNOTSUPP;
3927}
3928
3929static void f2fs_swap_deactivate(struct file *file)
3930{
3931}
3932#endif
3933
3934const struct address_space_operations f2fs_dblock_aops = {
3935 .readpage = f2fs_read_data_page,
3936 .readahead = f2fs_readahead,
3937 .writepage = f2fs_write_data_page,
3938 .writepages = f2fs_write_data_pages,
3939 .write_begin = f2fs_write_begin,
3940 .write_end = f2fs_write_end,
3941 .set_page_dirty = f2fs_set_data_page_dirty,
3942 .invalidatepage = f2fs_invalidate_page,
3943 .releasepage = f2fs_release_page,
3944 .direct_IO = noop_direct_IO,
3945 .bmap = f2fs_bmap,
3946 .swap_activate = f2fs_swap_activate,
3947 .swap_deactivate = f2fs_swap_deactivate,
3948#ifdef CONFIG_MIGRATION
3949 .migratepage = f2fs_migrate_page,
3950#endif
3951};
3952
3953void f2fs_clear_page_cache_dirty_tag(struct page *page)
3954{
3955 struct address_space *mapping = page_mapping(page);
3956 unsigned long flags;
3957
3958 xa_lock_irqsave(&mapping->i_pages, flags);
3959 __xa_clear_mark(&mapping->i_pages, page_index(page),
3960 PAGECACHE_TAG_DIRTY);
3961 xa_unlock_irqrestore(&mapping->i_pages, flags);
3962}
3963
3964int __init f2fs_init_post_read_processing(void)
3965{
3966 bio_post_read_ctx_cache =
3967 kmem_cache_create("f2fs_bio_post_read_ctx",
3968 sizeof(struct bio_post_read_ctx), 0, 0, NULL);
3969 if (!bio_post_read_ctx_cache)
3970 goto fail;
3971 bio_post_read_ctx_pool =
3972 mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS,
3973 bio_post_read_ctx_cache);
3974 if (!bio_post_read_ctx_pool)
3975 goto fail_free_cache;
3976 return 0;
3977
3978fail_free_cache:
3979 kmem_cache_destroy(bio_post_read_ctx_cache);
3980fail:
3981 return -ENOMEM;
3982}
3983
3984void f2fs_destroy_post_read_processing(void)
3985{
3986 mempool_destroy(bio_post_read_ctx_pool);
3987 kmem_cache_destroy(bio_post_read_ctx_cache);
3988}
3989
3990int f2fs_init_post_read_wq(struct f2fs_sb_info *sbi)
3991{
3992 if (!f2fs_sb_has_encrypt(sbi) &&
3993 !f2fs_sb_has_verity(sbi) &&
3994 !f2fs_sb_has_compression(sbi))
3995 return 0;
3996
3997 sbi->post_read_wq = alloc_workqueue("f2fs_post_read_wq",
3998 WQ_UNBOUND | WQ_HIGHPRI,
3999 num_online_cpus());
4000 if (!sbi->post_read_wq)
4001 return -ENOMEM;
4002 return 0;
4003}
4004
4005void f2fs_destroy_post_read_wq(struct f2fs_sb_info *sbi)
4006{
4007 if (sbi->post_read_wq)
4008 destroy_workqueue(sbi->post_read_wq);
4009}
4010
4011int __init f2fs_init_bio_entry_cache(void)
4012{
4013 bio_entry_slab = f2fs_kmem_cache_create("f2fs_bio_entry_slab",
4014 sizeof(struct bio_entry));
4015 if (!bio_entry_slab)
4016 return -ENOMEM;
4017 return 0;
4018}
4019
4020void f2fs_destroy_bio_entry_cache(void)
4021{
4022 kmem_cache_destroy(bio_entry_slab);
4023}
4024
4025static int f2fs_iomap_begin(struct inode *inode, loff_t offset, loff_t length,
4026 unsigned int flags, struct iomap *iomap,
4027 struct iomap *srcmap)
4028{
4029 struct f2fs_map_blocks map = {};
4030 pgoff_t next_pgofs = 0;
4031 int err;
4032
4033 map.m_lblk = bytes_to_blks(inode, offset);
4034 map.m_len = bytes_to_blks(inode, offset + length - 1) - map.m_lblk + 1;
4035 map.m_next_pgofs = &next_pgofs;
4036 map.m_seg_type = f2fs_rw_hint_to_seg_type(inode->i_write_hint);
4037 if (flags & IOMAP_WRITE)
4038 map.m_may_create = true;
4039
4040 err = f2fs_map_blocks(inode, &map, flags & IOMAP_WRITE,
4041 F2FS_GET_BLOCK_DIO);
4042 if (err)
4043 return err;
4044
4045 iomap->offset = blks_to_bytes(inode, map.m_lblk);
4046
4047 if (map.m_flags & (F2FS_MAP_MAPPED | F2FS_MAP_UNWRITTEN)) {
4048 iomap->length = blks_to_bytes(inode, map.m_len);
4049 if (map.m_flags & F2FS_MAP_MAPPED) {
4050 iomap->type = IOMAP_MAPPED;
4051 iomap->flags |= IOMAP_F_MERGED;
4052 } else {
4053 iomap->type = IOMAP_UNWRITTEN;
4054 }
4055 if (WARN_ON_ONCE(!__is_valid_data_blkaddr(map.m_pblk)))
4056 return -EINVAL;
4057
4058 iomap->bdev = map.m_bdev;
4059 iomap->addr = blks_to_bytes(inode, map.m_pblk);
4060 } else {
4061 iomap->length = blks_to_bytes(inode, next_pgofs) -
4062 iomap->offset;
4063 iomap->type = IOMAP_HOLE;
4064 iomap->addr = IOMAP_NULL_ADDR;
4065 }
4066
4067 if (map.m_flags & F2FS_MAP_NEW)
4068 iomap->flags |= IOMAP_F_NEW;
4069 if ((inode->i_state & I_DIRTY_DATASYNC) ||
4070 offset + length > i_size_read(inode))
4071 iomap->flags |= IOMAP_F_DIRTY;
4072
4073 return 0;
4074}
4075
4076const struct iomap_ops f2fs_iomap_ops = {
4077 .iomap_begin = f2fs_iomap_begin,
4078};
Linux 6.x block layer and io_uring tree(s)