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7c1a000d | 1 | // SPDX-License-Identifier: GPL-2.0 |
0a8165d7 | 2 | /* |
eb47b800 JK |
3 | * fs/f2fs/data.c |
4 | * | |
5 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
6 | * http://www.samsung.com/ | |
eb47b800 JK |
7 | */ |
8 | #include <linux/fs.h> | |
9 | #include <linux/f2fs_fs.h> | |
10 | #include <linux/buffer_head.h> | |
11 | #include <linux/mpage.h> | |
12 | #include <linux/writeback.h> | |
13 | #include <linux/backing-dev.h> | |
8f46dcae | 14 | #include <linux/pagevec.h> |
eb47b800 JK |
15 | #include <linux/blkdev.h> |
16 | #include <linux/bio.h> | |
4969c06a | 17 | #include <linux/swap.h> |
690e4a3e | 18 | #include <linux/prefetch.h> |
e2e40f2c | 19 | #include <linux/uio.h> |
f1e88660 | 20 | #include <linux/cleancache.h> |
174cd4b1 | 21 | #include <linux/sched/signal.h> |
eb47b800 JK |
22 | |
23 | #include "f2fs.h" | |
24 | #include "node.h" | |
25 | #include "segment.h" | |
db9f7c1a | 26 | #include "trace.h" |
848753aa | 27 | #include <trace/events/f2fs.h> |
eb47b800 | 28 | |
6dbb1796 EB |
29 | #define NUM_PREALLOC_POST_READ_CTXS 128 |
30 | ||
31 | static struct kmem_cache *bio_post_read_ctx_cache; | |
32 | static mempool_t *bio_post_read_ctx_pool; | |
33 | ||
36951b38 CY |
34 | static bool __is_cp_guaranteed(struct page *page) |
35 | { | |
36 | struct address_space *mapping = page->mapping; | |
37 | struct inode *inode; | |
38 | struct f2fs_sb_info *sbi; | |
39 | ||
40 | if (!mapping) | |
41 | return false; | |
42 | ||
43 | inode = mapping->host; | |
44 | sbi = F2FS_I_SB(inode); | |
45 | ||
46 | if (inode->i_ino == F2FS_META_INO(sbi) || | |
47 | inode->i_ino == F2FS_NODE_INO(sbi) || | |
48 | S_ISDIR(inode->i_mode) || | |
e7a4feb0 | 49 | (S_ISREG(inode->i_mode) && |
af033b2a | 50 | (f2fs_is_atomic_file(inode) || IS_NOQUOTA(inode))) || |
36951b38 CY |
51 | is_cold_data(page)) |
52 | return true; | |
53 | return false; | |
54 | } | |
55 | ||
5f9abab4 JK |
56 | static enum count_type __read_io_type(struct page *page) |
57 | { | |
4969c06a | 58 | struct address_space *mapping = page_file_mapping(page); |
5f9abab4 JK |
59 | |
60 | if (mapping) { | |
61 | struct inode *inode = mapping->host; | |
62 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
63 | ||
64 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
65 | return F2FS_RD_META; | |
66 | ||
67 | if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
68 | return F2FS_RD_NODE; | |
69 | } | |
70 | return F2FS_RD_DATA; | |
71 | } | |
72 | ||
6dbb1796 EB |
73 | /* postprocessing steps for read bios */ |
74 | enum bio_post_read_step { | |
75 | STEP_INITIAL = 0, | |
76 | STEP_DECRYPT, | |
77 | }; | |
78 | ||
79 | struct bio_post_read_ctx { | |
80 | struct bio *bio; | |
81 | struct work_struct work; | |
82 | unsigned int cur_step; | |
83 | unsigned int enabled_steps; | |
84 | }; | |
85 | ||
86 | static void __read_end_io(struct bio *bio) | |
93dfe2ac | 87 | { |
6dbb1796 EB |
88 | struct page *page; |
89 | struct bio_vec *bv; | |
6dc4f100 | 90 | struct bvec_iter_all iter_all; |
93dfe2ac | 91 | |
2b070cfe | 92 | bio_for_each_segment_all(bv, bio, iter_all) { |
6dbb1796 EB |
93 | page = bv->bv_page; |
94 | ||
95 | /* PG_error was set if any post_read step failed */ | |
96 | if (bio->bi_status || PageError(page)) { | |
97 | ClearPageUptodate(page); | |
fb7d70db JK |
98 | /* will re-read again later */ |
99 | ClearPageError(page); | |
6dbb1796 EB |
100 | } else { |
101 | SetPageUptodate(page); | |
102 | } | |
5f9abab4 | 103 | dec_page_count(F2FS_P_SB(page), __read_io_type(page)); |
6dbb1796 EB |
104 | unlock_page(page); |
105 | } | |
106 | if (bio->bi_private) | |
107 | mempool_free(bio->bi_private, bio_post_read_ctx_pool); | |
108 | bio_put(bio); | |
109 | } | |
110 | ||
111 | static void bio_post_read_processing(struct bio_post_read_ctx *ctx); | |
112 | ||
113 | static void decrypt_work(struct work_struct *work) | |
114 | { | |
115 | struct bio_post_read_ctx *ctx = | |
116 | container_of(work, struct bio_post_read_ctx, work); | |
117 | ||
118 | fscrypt_decrypt_bio(ctx->bio); | |
119 | ||
120 | bio_post_read_processing(ctx); | |
121 | } | |
122 | ||
123 | static void bio_post_read_processing(struct bio_post_read_ctx *ctx) | |
124 | { | |
125 | switch (++ctx->cur_step) { | |
126 | case STEP_DECRYPT: | |
127 | if (ctx->enabled_steps & (1 << STEP_DECRYPT)) { | |
128 | INIT_WORK(&ctx->work, decrypt_work); | |
129 | fscrypt_enqueue_decrypt_work(&ctx->work); | |
130 | return; | |
131 | } | |
132 | ctx->cur_step++; | |
133 | /* fall-through */ | |
134 | default: | |
135 | __read_end_io(ctx->bio); | |
136 | } | |
137 | } | |
138 | ||
139 | static bool f2fs_bio_post_read_required(struct bio *bio) | |
140 | { | |
141 | return bio->bi_private && !bio->bi_status; | |
142 | } | |
143 | ||
144 | static void f2fs_read_end_io(struct bio *bio) | |
145 | { | |
6f5c2ed0 CY |
146 | if (time_to_inject(F2FS_P_SB(bio_first_page_all(bio)), |
147 | FAULT_READ_IO)) { | |
148 | f2fs_show_injection_info(FAULT_READ_IO); | |
4e4cbee9 | 149 | bio->bi_status = BLK_STS_IOERR; |
55523519 | 150 | } |
8b038c70 | 151 | |
6dbb1796 EB |
152 | if (f2fs_bio_post_read_required(bio)) { |
153 | struct bio_post_read_ctx *ctx = bio->bi_private; | |
f1e88660 | 154 | |
6dbb1796 EB |
155 | ctx->cur_step = STEP_INITIAL; |
156 | bio_post_read_processing(ctx); | |
157 | return; | |
f1e88660 | 158 | } |
6dbb1796 EB |
159 | |
160 | __read_end_io(bio); | |
f1e88660 JK |
161 | } |
162 | ||
4246a0b6 | 163 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 164 | { |
1b1f559f | 165 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e | 166 | struct bio_vec *bvec; |
6dc4f100 | 167 | struct bvec_iter_all iter_all; |
93dfe2ac | 168 | |
6f5c2ed0 CY |
169 | if (time_to_inject(sbi, FAULT_WRITE_IO)) { |
170 | f2fs_show_injection_info(FAULT_WRITE_IO); | |
171 | bio->bi_status = BLK_STS_IOERR; | |
172 | } | |
173 | ||
2b070cfe | 174 | bio_for_each_segment_all(bvec, bio, iter_all) { |
93dfe2ac | 175 | struct page *page = bvec->bv_page; |
36951b38 | 176 | enum count_type type = WB_DATA_TYPE(page); |
93dfe2ac | 177 | |
0a595eba JK |
178 | if (IS_DUMMY_WRITTEN_PAGE(page)) { |
179 | set_page_private(page, (unsigned long)NULL); | |
180 | ClearPagePrivate(page); | |
181 | unlock_page(page); | |
182 | mempool_free(page, sbi->write_io_dummy); | |
183 | ||
4e4cbee9 | 184 | if (unlikely(bio->bi_status)) |
0a595eba JK |
185 | f2fs_stop_checkpoint(sbi, true); |
186 | continue; | |
187 | } | |
188 | ||
d2d0727b | 189 | fscrypt_finalize_bounce_page(&page); |
4375a336 | 190 | |
4e4cbee9 | 191 | if (unlikely(bio->bi_status)) { |
5114a97a | 192 | mapping_set_error(page->mapping, -EIO); |
b1ca321d JK |
193 | if (type == F2FS_WB_CP_DATA) |
194 | f2fs_stop_checkpoint(sbi, true); | |
93dfe2ac | 195 | } |
7dff55d2 YH |
196 | |
197 | f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) && | |
198 | page->index != nid_of_node(page)); | |
199 | ||
36951b38 | 200 | dec_page_count(sbi, type); |
50fa53ec CY |
201 | if (f2fs_in_warm_node_list(sbi, page)) |
202 | f2fs_del_fsync_node_entry(sbi, page); | |
36951b38 | 203 | clear_cold_data(page); |
93dfe2ac | 204 | end_page_writeback(page); |
f568849e | 205 | } |
36951b38 | 206 | if (!get_pages(sbi, F2FS_WB_CP_DATA) && |
f5730184 | 207 | wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
208 | wake_up(&sbi->cp_wait); |
209 | ||
210 | bio_put(bio); | |
211 | } | |
212 | ||
3c62be17 JK |
213 | /* |
214 | * Return true, if pre_bio's bdev is same as its target device. | |
215 | */ | |
216 | struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, | |
217 | block_t blk_addr, struct bio *bio) | |
218 | { | |
219 | struct block_device *bdev = sbi->sb->s_bdev; | |
220 | int i; | |
221 | ||
0916878d DLM |
222 | if (f2fs_is_multi_device(sbi)) { |
223 | for (i = 0; i < sbi->s_ndevs; i++) { | |
224 | if (FDEV(i).start_blk <= blk_addr && | |
225 | FDEV(i).end_blk >= blk_addr) { | |
226 | blk_addr -= FDEV(i).start_blk; | |
227 | bdev = FDEV(i).bdev; | |
228 | break; | |
229 | } | |
3c62be17 JK |
230 | } |
231 | } | |
232 | if (bio) { | |
74d46992 | 233 | bio_set_dev(bio, bdev); |
3c62be17 JK |
234 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
235 | } | |
236 | return bdev; | |
237 | } | |
238 | ||
239 | int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) | |
240 | { | |
241 | int i; | |
242 | ||
0916878d DLM |
243 | if (!f2fs_is_multi_device(sbi)) |
244 | return 0; | |
245 | ||
3c62be17 JK |
246 | for (i = 0; i < sbi->s_ndevs; i++) |
247 | if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) | |
248 | return i; | |
249 | return 0; | |
250 | } | |
251 | ||
252 | static bool __same_bdev(struct f2fs_sb_info *sbi, | |
253 | block_t blk_addr, struct bio *bio) | |
254 | { | |
74d46992 CH |
255 | struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL); |
256 | return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno; | |
3c62be17 JK |
257 | } |
258 | ||
940a6d34 GZ |
259 | /* |
260 | * Low-level block read/write IO operations. | |
261 | */ | |
262 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
578c6478 | 263 | struct writeback_control *wbc, |
0cdd3195 HL |
264 | int npages, bool is_read, |
265 | enum page_type type, enum temp_type temp) | |
940a6d34 GZ |
266 | { |
267 | struct bio *bio; | |
268 | ||
d62fe971 | 269 | bio = f2fs_bio_alloc(sbi, npages, true); |
940a6d34 | 270 | |
3c62be17 | 271 | f2fs_target_device(sbi, blk_addr, bio); |
0cdd3195 HL |
272 | if (is_read) { |
273 | bio->bi_end_io = f2fs_read_end_io; | |
274 | bio->bi_private = NULL; | |
275 | } else { | |
276 | bio->bi_end_io = f2fs_write_end_io; | |
277 | bio->bi_private = sbi; | |
4d57b86d | 278 | bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, type, temp); |
0cdd3195 | 279 | } |
578c6478 YY |
280 | if (wbc) |
281 | wbc_init_bio(wbc, bio); | |
940a6d34 GZ |
282 | |
283 | return bio; | |
284 | } | |
285 | ||
4fc29c1a LT |
286 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
287 | struct bio *bio, enum page_type type) | |
f5730184 | 288 | { |
4fc29c1a | 289 | if (!is_read_io(bio_op(bio))) { |
0a595eba JK |
290 | unsigned int start; |
291 | ||
0a595eba JK |
292 | if (type != DATA && type != NODE) |
293 | goto submit_io; | |
294 | ||
66415cee | 295 | if (test_opt(sbi, LFS) && current->plug) |
3bb09a0e TY |
296 | blk_finish_plug(current->plug); |
297 | ||
0a595eba JK |
298 | start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS; |
299 | start %= F2FS_IO_SIZE(sbi); | |
300 | ||
301 | if (start == 0) | |
302 | goto submit_io; | |
303 | ||
304 | /* fill dummy pages */ | |
305 | for (; start < F2FS_IO_SIZE(sbi); start++) { | |
306 | struct page *page = | |
307 | mempool_alloc(sbi->write_io_dummy, | |
bc73a4b2 | 308 | GFP_NOIO | __GFP_NOFAIL); |
0a595eba JK |
309 | f2fs_bug_on(sbi, !page); |
310 | ||
bc73a4b2 | 311 | zero_user_segment(page, 0, PAGE_SIZE); |
0a595eba JK |
312 | SetPagePrivate(page); |
313 | set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE); | |
314 | lock_page(page); | |
315 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) | |
316 | f2fs_bug_on(sbi, 1); | |
317 | } | |
318 | /* | |
319 | * In the NODE case, we lose next block address chain. So, we | |
320 | * need to do checkpoint in f2fs_sync_file. | |
321 | */ | |
322 | if (type == NODE) | |
323 | set_sbi_flag(sbi, SBI_NEED_CP); | |
19a5f5e2 | 324 | } |
0a595eba | 325 | submit_io: |
554b5125 JK |
326 | if (is_read_io(bio_op(bio))) |
327 | trace_f2fs_submit_read_bio(sbi->sb, type, bio); | |
328 | else | |
329 | trace_f2fs_submit_write_bio(sbi->sb, type, bio); | |
4e49ea4a | 330 | submit_bio(bio); |
f5730184 JK |
331 | } |
332 | ||
458e6197 | 333 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 334 | { |
458e6197 | 335 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
336 | |
337 | if (!io->bio) | |
338 | return; | |
339 | ||
554b5125 JK |
340 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
341 | ||
04d328de | 342 | if (is_read_io(fio->op)) |
554b5125 | 343 | trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio); |
6a8f8ca5 | 344 | else |
554b5125 | 345 | trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio); |
04d328de | 346 | |
4fc29c1a | 347 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
348 | io->bio = NULL; |
349 | } | |
350 | ||
8648de2c | 351 | static bool __has_merged_page(struct bio *bio, struct inode *inode, |
bab475c5 | 352 | struct page *page, nid_t ino) |
0fd785eb | 353 | { |
0fd785eb CY |
354 | struct bio_vec *bvec; |
355 | struct page *target; | |
6dc4f100 | 356 | struct bvec_iter_all iter_all; |
0fd785eb | 357 | |
8648de2c | 358 | if (!bio) |
0fd785eb | 359 | return false; |
0c3a5797 | 360 | |
bab475c5 | 361 | if (!inode && !page && !ino) |
0c3a5797 | 362 | return true; |
0fd785eb | 363 | |
8648de2c | 364 | bio_for_each_segment_all(bvec, bio, iter_all) { |
0fd785eb | 365 | |
d2d0727b EB |
366 | target = bvec->bv_page; |
367 | if (fscrypt_is_bounce_page(target)) | |
368 | target = fscrypt_pagecache_page(target); | |
0fd785eb | 369 | |
0c3a5797 CY |
370 | if (inode && inode == target->mapping->host) |
371 | return true; | |
bab475c5 CY |
372 | if (page && page == target) |
373 | return true; | |
0c3a5797 | 374 | if (ino && ino == ino_of_node(target)) |
0fd785eb | 375 | return true; |
0fd785eb CY |
376 | } |
377 | ||
0fd785eb CY |
378 | return false; |
379 | } | |
380 | ||
b9109b0e | 381 | static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi, |
a912b54d | 382 | enum page_type type, enum temp_type temp) |
93dfe2ac JK |
383 | { |
384 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
a912b54d | 385 | struct f2fs_bio_info *io = sbi->write_io[btype] + temp; |
93dfe2ac | 386 | |
df0f8dc0 | 387 | down_write(&io->io_rwsem); |
458e6197 JK |
388 | |
389 | /* change META to META_FLUSH in the checkpoint procedure */ | |
390 | if (type >= META_FLUSH) { | |
391 | io->fio.type = META_FLUSH; | |
04d328de | 392 | io->fio.op = REQ_OP_WRITE; |
3adc5fcb | 393 | io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC; |
70fd7614 | 394 | if (!test_opt(sbi, NOBARRIER)) |
7f54f51f | 395 | io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA; |
458e6197 JK |
396 | } |
397 | __submit_merged_bio(io); | |
df0f8dc0 | 398 | up_write(&io->io_rwsem); |
93dfe2ac JK |
399 | } |
400 | ||
a912b54d | 401 | static void __submit_merged_write_cond(struct f2fs_sb_info *sbi, |
bab475c5 CY |
402 | struct inode *inode, struct page *page, |
403 | nid_t ino, enum page_type type, bool force) | |
0c3a5797 | 404 | { |
a912b54d | 405 | enum temp_type temp; |
1e771e83 | 406 | bool ret = true; |
a912b54d JK |
407 | |
408 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { | |
1e771e83 YS |
409 | if (!force) { |
410 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
411 | struct f2fs_bio_info *io = sbi->write_io[btype] + temp; | |
a912b54d | 412 | |
1e771e83 | 413 | down_read(&io->io_rwsem); |
8648de2c | 414 | ret = __has_merged_page(io->bio, inode, page, ino); |
1e771e83 YS |
415 | up_read(&io->io_rwsem); |
416 | } | |
417 | if (ret) | |
418 | __f2fs_submit_merged_write(sbi, type, temp); | |
a912b54d JK |
419 | |
420 | /* TODO: use HOT temp only for meta pages now. */ | |
421 | if (type >= META) | |
422 | break; | |
423 | } | |
0c3a5797 CY |
424 | } |
425 | ||
b9109b0e | 426 | void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type) |
0c3a5797 | 427 | { |
adcc00f7 | 428 | __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true); |
0c3a5797 CY |
429 | } |
430 | ||
b9109b0e | 431 | void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi, |
bab475c5 CY |
432 | struct inode *inode, struct page *page, |
433 | nid_t ino, enum page_type type) | |
0c3a5797 | 434 | { |
bab475c5 | 435 | __submit_merged_write_cond(sbi, inode, page, ino, type, false); |
0c3a5797 CY |
436 | } |
437 | ||
b9109b0e | 438 | void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi) |
406657dd | 439 | { |
b9109b0e JK |
440 | f2fs_submit_merged_write(sbi, DATA); |
441 | f2fs_submit_merged_write(sbi, NODE); | |
442 | f2fs_submit_merged_write(sbi, META); | |
406657dd CY |
443 | } |
444 | ||
93dfe2ac JK |
445 | /* |
446 | * Fill the locked page with data located in the block address. | |
771a9a71 | 447 | * A caller needs to unlock the page on failure. |
93dfe2ac | 448 | */ |
05ca3632 | 449 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 450 | { |
93dfe2ac | 451 | struct bio *bio; |
0b81d077 JK |
452 | struct page *page = fio->encrypted_page ? |
453 | fio->encrypted_page : fio->page; | |
93dfe2ac | 454 | |
c9b60788 | 455 | if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, |
93770ab7 CY |
456 | fio->is_por ? META_POR : (__is_meta_io(fio) ? |
457 | META_GENERIC : DATA_GENERIC_ENHANCE))) | |
10f966bb | 458 | return -EFSCORRUPTED; |
c9b60788 | 459 | |
2ace38e0 | 460 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 461 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
462 | |
463 | /* Allocate a new bio */ | |
578c6478 | 464 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc, |
0cdd3195 | 465 | 1, is_read_io(fio->op), fio->type, fio->temp); |
93dfe2ac | 466 | |
09cbfeaf | 467 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 468 | bio_put(bio); |
93dfe2ac JK |
469 | return -EFAULT; |
470 | } | |
78efac53 CY |
471 | |
472 | if (fio->io_wbc && !is_read_io(fio->op)) | |
34e51a5e | 473 | wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE); |
78efac53 | 474 | |
04d328de | 475 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 476 | |
5f9abab4 JK |
477 | inc_page_count(fio->sbi, is_read_io(fio->op) ? |
478 | __read_io_type(page): WB_DATA_TYPE(fio->page)); | |
4c58ed07 CY |
479 | |
480 | __submit_bio(fio->sbi, bio, fio->type); | |
93dfe2ac JK |
481 | return 0; |
482 | } | |
483 | ||
8896cbdf CY |
484 | static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, |
485 | block_t last_blkaddr, block_t cur_blkaddr) | |
486 | { | |
487 | if (last_blkaddr + 1 != cur_blkaddr) | |
488 | return false; | |
489 | return __same_bdev(sbi, cur_blkaddr, bio); | |
490 | } | |
491 | ||
492 | static bool io_type_is_mergeable(struct f2fs_bio_info *io, | |
493 | struct f2fs_io_info *fio) | |
494 | { | |
495 | if (io->fio.op != fio->op) | |
496 | return false; | |
497 | return io->fio.op_flags == fio->op_flags; | |
498 | } | |
499 | ||
500 | static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, | |
501 | struct f2fs_bio_info *io, | |
502 | struct f2fs_io_info *fio, | |
503 | block_t last_blkaddr, | |
504 | block_t cur_blkaddr) | |
505 | { | |
c72db71e CY |
506 | if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) { |
507 | unsigned int filled_blocks = | |
508 | F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size); | |
509 | unsigned int io_size = F2FS_IO_SIZE(sbi); | |
510 | unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt; | |
511 | ||
512 | /* IOs in bio is aligned and left space of vectors is not enough */ | |
513 | if (!(filled_blocks % io_size) && left_vecs < io_size) | |
514 | return false; | |
515 | } | |
8896cbdf CY |
516 | if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr)) |
517 | return false; | |
518 | return io_type_is_mergeable(io, fio); | |
519 | } | |
520 | ||
8648de2c CY |
521 | int f2fs_merge_page_bio(struct f2fs_io_info *fio) |
522 | { | |
523 | struct bio *bio = *fio->bio; | |
524 | struct page *page = fio->encrypted_page ? | |
525 | fio->encrypted_page : fio->page; | |
526 | ||
527 | if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, | |
528 | __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC)) | |
10f966bb | 529 | return -EFSCORRUPTED; |
8648de2c CY |
530 | |
531 | trace_f2fs_submit_page_bio(page, fio); | |
532 | f2fs_trace_ios(fio, 0); | |
533 | ||
8896cbdf CY |
534 | if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block, |
535 | fio->new_blkaddr)) { | |
8648de2c CY |
536 | __submit_bio(fio->sbi, bio, fio->type); |
537 | bio = NULL; | |
538 | } | |
539 | alloc_new: | |
540 | if (!bio) { | |
541 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc, | |
542 | BIO_MAX_PAGES, false, fio->type, fio->temp); | |
543 | bio_set_op_attrs(bio, fio->op, fio->op_flags); | |
544 | } | |
545 | ||
546 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { | |
547 | __submit_bio(fio->sbi, bio, fio->type); | |
548 | bio = NULL; | |
549 | goto alloc_new; | |
550 | } | |
551 | ||
552 | if (fio->io_wbc) | |
9637d517 | 553 | wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE); |
8648de2c CY |
554 | |
555 | inc_page_count(fio->sbi, WB_DATA_TYPE(page)); | |
556 | ||
557 | *fio->last_block = fio->new_blkaddr; | |
558 | *fio->bio = bio; | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
563 | static void f2fs_submit_ipu_bio(struct f2fs_sb_info *sbi, struct bio **bio, | |
564 | struct page *page) | |
565 | { | |
566 | if (!bio) | |
567 | return; | |
568 | ||
569 | if (!__has_merged_page(*bio, NULL, page, 0)) | |
570 | return; | |
571 | ||
572 | __submit_bio(sbi, *bio, DATA); | |
573 | *bio = NULL; | |
574 | } | |
575 | ||
fe16efe6 | 576 | void f2fs_submit_page_write(struct f2fs_io_info *fio) |
93dfe2ac | 577 | { |
05ca3632 | 578 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 579 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
a912b54d | 580 | struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp; |
4375a336 | 581 | struct page *bio_page; |
93dfe2ac | 582 | |
b9109b0e | 583 | f2fs_bug_on(sbi, is_read_io(fio->op)); |
93dfe2ac | 584 | |
fb830fc5 CY |
585 | down_write(&io->io_rwsem); |
586 | next: | |
587 | if (fio->in_list) { | |
588 | spin_lock(&io->io_lock); | |
589 | if (list_empty(&io->io_list)) { | |
590 | spin_unlock(&io->io_lock); | |
fe16efe6 | 591 | goto out; |
fb830fc5 CY |
592 | } |
593 | fio = list_first_entry(&io->io_list, | |
594 | struct f2fs_io_info, list); | |
595 | list_del(&fio->list); | |
596 | spin_unlock(&io->io_lock); | |
597 | } | |
93dfe2ac | 598 | |
93770ab7 | 599 | verify_fio_blkaddr(fio); |
93dfe2ac | 600 | |
36951b38 CY |
601 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
602 | ||
ebf7c522 TM |
603 | /* set submitted = true as a return value */ |
604 | fio->submitted = true; | |
d68f735b | 605 | |
b9109b0e | 606 | inc_page_count(sbi, WB_DATA_TYPE(bio_page)); |
93dfe2ac | 607 | |
8896cbdf CY |
608 | if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio, |
609 | io->last_block_in_bio, fio->new_blkaddr)) | |
458e6197 | 610 | __submit_merged_bio(io); |
93dfe2ac JK |
611 | alloc_new: |
612 | if (io->bio == NULL) { | |
0a595eba JK |
613 | if ((fio->type == DATA || fio->type == NODE) && |
614 | fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) { | |
b9109b0e | 615 | dec_page_count(sbi, WB_DATA_TYPE(bio_page)); |
fe16efe6 CY |
616 | fio->retry = true; |
617 | goto skip; | |
0a595eba | 618 | } |
578c6478 | 619 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, fio->io_wbc, |
0cdd3195 HL |
620 | BIO_MAX_PAGES, false, |
621 | fio->type, fio->temp); | |
458e6197 | 622 | io->fio = *fio; |
93dfe2ac JK |
623 | } |
624 | ||
a912b54d | 625 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) { |
458e6197 | 626 | __submit_merged_bio(io); |
93dfe2ac JK |
627 | goto alloc_new; |
628 | } | |
629 | ||
578c6478 | 630 | if (fio->io_wbc) |
34e51a5e | 631 | wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE); |
578c6478 | 632 | |
7a9d7548 | 633 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 634 | f2fs_trace_ios(fio, 0); |
fb830fc5 CY |
635 | |
636 | trace_f2fs_submit_page_write(fio->page, fio); | |
fe16efe6 | 637 | skip: |
fb830fc5 CY |
638 | if (fio->in_list) |
639 | goto next; | |
fe16efe6 | 640 | out: |
4354994f DR |
641 | if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) || |
642 | f2fs_is_checkpoint_ready(sbi)) | |
5ce80586 | 643 | __submit_merged_bio(io); |
df0f8dc0 | 644 | up_write(&io->io_rwsem); |
93dfe2ac JK |
645 | } |
646 | ||
13ba41e3 | 647 | static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr, |
e2e59414 | 648 | unsigned nr_pages, unsigned op_flag) |
13ba41e3 JK |
649 | { |
650 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
13ba41e3 | 651 | struct bio *bio; |
6dbb1796 EB |
652 | struct bio_post_read_ctx *ctx; |
653 | unsigned int post_read_steps = 0; | |
13ba41e3 | 654 | |
d62fe971 | 655 | bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false); |
6dbb1796 | 656 | if (!bio) |
13ba41e3 | 657 | return ERR_PTR(-ENOMEM); |
13ba41e3 JK |
658 | f2fs_target_device(sbi, blkaddr, bio); |
659 | bio->bi_end_io = f2fs_read_end_io; | |
e2e59414 | 660 | bio_set_op_attrs(bio, REQ_OP_READ, op_flag); |
13ba41e3 | 661 | |
6dbb1796 EB |
662 | if (f2fs_encrypted_file(inode)) |
663 | post_read_steps |= 1 << STEP_DECRYPT; | |
664 | if (post_read_steps) { | |
665 | ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS); | |
666 | if (!ctx) { | |
667 | bio_put(bio); | |
668 | return ERR_PTR(-ENOMEM); | |
669 | } | |
670 | ctx->bio = bio; | |
671 | ctx->enabled_steps = post_read_steps; | |
672 | bio->bi_private = ctx; | |
6dbb1796 EB |
673 | } |
674 | ||
13ba41e3 JK |
675 | return bio; |
676 | } | |
677 | ||
678 | /* This can handle encryption stuffs */ | |
679 | static int f2fs_submit_page_read(struct inode *inode, struct page *page, | |
680 | block_t blkaddr) | |
681 | { | |
93770ab7 CY |
682 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
683 | struct bio *bio; | |
13ba41e3 | 684 | |
93770ab7 | 685 | bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0); |
13ba41e3 JK |
686 | if (IS_ERR(bio)) |
687 | return PTR_ERR(bio); | |
688 | ||
0ded69f6 JK |
689 | /* wait for GCed page writeback via META_MAPPING */ |
690 | f2fs_wait_on_block_writeback(inode, blkaddr); | |
691 | ||
13ba41e3 JK |
692 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
693 | bio_put(bio); | |
694 | return -EFAULT; | |
695 | } | |
fb7d70db | 696 | ClearPageError(page); |
93770ab7 CY |
697 | inc_page_count(sbi, F2FS_RD_DATA); |
698 | __submit_bio(sbi, bio, DATA); | |
13ba41e3 JK |
699 | return 0; |
700 | } | |
701 | ||
46008c6d CY |
702 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
703 | { | |
704 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
705 | __le32 *addr_array; | |
7a2af766 CY |
706 | int base = 0; |
707 | ||
708 | if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode)) | |
709 | base = get_extra_isize(dn->inode); | |
46008c6d CY |
710 | |
711 | /* Get physical address of data block */ | |
712 | addr_array = blkaddr_in_node(rn); | |
7a2af766 | 713 | addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
46008c6d CY |
714 | } |
715 | ||
0a8165d7 | 716 | /* |
eb47b800 JK |
717 | * Lock ordering for the change of data block address: |
718 | * ->data_page | |
719 | * ->node_page | |
720 | * update block addresses in the node page | |
721 | */ | |
4d57b86d | 722 | void f2fs_set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 723 | { |
bae0ee7a | 724 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true); |
46008c6d CY |
725 | __set_data_blkaddr(dn); |
726 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 727 | dn->node_changed = true; |
eb47b800 JK |
728 | } |
729 | ||
f28b3434 CY |
730 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
731 | { | |
732 | dn->data_blkaddr = blkaddr; | |
4d57b86d | 733 | f2fs_set_data_blkaddr(dn); |
f28b3434 CY |
734 | f2fs_update_extent_cache(dn); |
735 | } | |
736 | ||
46008c6d | 737 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
4d57b86d | 738 | int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) |
eb47b800 | 739 | { |
4081363f | 740 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
0abd675e | 741 | int err; |
eb47b800 | 742 | |
46008c6d CY |
743 | if (!count) |
744 | return 0; | |
745 | ||
91942321 | 746 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 747 | return -EPERM; |
0abd675e CY |
748 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
749 | return err; | |
eb47b800 | 750 | |
46008c6d CY |
751 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
752 | dn->ofs_in_node, count); | |
753 | ||
bae0ee7a | 754 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true); |
46008c6d CY |
755 | |
756 | for (; count > 0; dn->ofs_in_node++) { | |
7a2af766 CY |
757 | block_t blkaddr = datablock_addr(dn->inode, |
758 | dn->node_page, dn->ofs_in_node); | |
46008c6d CY |
759 | if (blkaddr == NULL_ADDR) { |
760 | dn->data_blkaddr = NEW_ADDR; | |
761 | __set_data_blkaddr(dn); | |
762 | count--; | |
763 | } | |
764 | } | |
765 | ||
766 | if (set_page_dirty(dn->node_page)) | |
767 | dn->node_changed = true; | |
eb47b800 JK |
768 | return 0; |
769 | } | |
770 | ||
46008c6d | 771 | /* Should keep dn->ofs_in_node unchanged */ |
4d57b86d | 772 | int f2fs_reserve_new_block(struct dnode_of_data *dn) |
46008c6d CY |
773 | { |
774 | unsigned int ofs_in_node = dn->ofs_in_node; | |
775 | int ret; | |
776 | ||
4d57b86d | 777 | ret = f2fs_reserve_new_blocks(dn, 1); |
46008c6d CY |
778 | dn->ofs_in_node = ofs_in_node; |
779 | return ret; | |
780 | } | |
781 | ||
b600965c HL |
782 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
783 | { | |
784 | bool need_put = dn->inode_page ? false : true; | |
785 | int err; | |
786 | ||
4d57b86d | 787 | err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE); |
b600965c HL |
788 | if (err) |
789 | return err; | |
a8865372 | 790 | |
b600965c | 791 | if (dn->data_blkaddr == NULL_ADDR) |
4d57b86d | 792 | err = f2fs_reserve_new_block(dn); |
a8865372 | 793 | if (err || need_put) |
b600965c HL |
794 | f2fs_put_dnode(dn); |
795 | return err; | |
796 | } | |
797 | ||
759af1c9 | 798 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 799 | { |
e15882b6 | 800 | struct extent_info ei = {0,0,0}; |
759af1c9 | 801 | struct inode *inode = dn->inode; |
028a41e8 | 802 | |
759af1c9 FL |
803 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
804 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
805 | return 0; | |
429511cd | 806 | } |
028a41e8 | 807 | |
759af1c9 | 808 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
809 | } |
810 | ||
4d57b86d | 811 | struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 812 | int op_flags, bool for_write) |
eb47b800 | 813 | { |
eb47b800 JK |
814 | struct address_space *mapping = inode->i_mapping; |
815 | struct dnode_of_data dn; | |
816 | struct page *page; | |
e15882b6 | 817 | struct extent_info ei = {0,0,0}; |
eb47b800 | 818 | int err; |
4375a336 | 819 | |
a56c7c6f | 820 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
821 | if (!page) |
822 | return ERR_PTR(-ENOMEM); | |
823 | ||
cb3bc9ee CY |
824 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
825 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
93770ab7 CY |
826 | if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr, |
827 | DATA_GENERIC_ENHANCE_READ)) { | |
10f966bb | 828 | err = -EFSCORRUPTED; |
93770ab7 CY |
829 | goto put_err; |
830 | } | |
cb3bc9ee CY |
831 | goto got_it; |
832 | } | |
833 | ||
eb47b800 | 834 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
4d57b86d | 835 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
836 | if (err) |
837 | goto put_err; | |
eb47b800 JK |
838 | f2fs_put_dnode(&dn); |
839 | ||
6bacf52f | 840 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
841 | err = -ENOENT; |
842 | goto put_err; | |
650495de | 843 | } |
93770ab7 CY |
844 | if (dn.data_blkaddr != NEW_ADDR && |
845 | !f2fs_is_valid_blkaddr(F2FS_I_SB(inode), | |
846 | dn.data_blkaddr, | |
847 | DATA_GENERIC_ENHANCE)) { | |
10f966bb | 848 | err = -EFSCORRUPTED; |
93770ab7 CY |
849 | goto put_err; |
850 | } | |
cb3bc9ee | 851 | got_it: |
43f3eae1 JK |
852 | if (PageUptodate(page)) { |
853 | unlock_page(page); | |
eb47b800 | 854 | return page; |
43f3eae1 | 855 | } |
eb47b800 | 856 | |
d59ff4df JK |
857 | /* |
858 | * A new dentry page is allocated but not able to be written, since its | |
859 | * new inode page couldn't be allocated due to -ENOSPC. | |
860 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
4d57b86d CY |
861 | * see, f2fs_add_link -> f2fs_get_new_data_page -> |
862 | * f2fs_init_inode_metadata. | |
d59ff4df JK |
863 | */ |
864 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 865 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
866 | if (!PageUptodate(page)) |
867 | SetPageUptodate(page); | |
43f3eae1 | 868 | unlock_page(page); |
d59ff4df JK |
869 | return page; |
870 | } | |
eb47b800 | 871 | |
13ba41e3 | 872 | err = f2fs_submit_page_read(inode, page, dn.data_blkaddr); |
393ff91f | 873 | if (err) |
86531d6b | 874 | goto put_err; |
43f3eae1 | 875 | return page; |
86531d6b JK |
876 | |
877 | put_err: | |
878 | f2fs_put_page(page, 1); | |
879 | return ERR_PTR(err); | |
43f3eae1 JK |
880 | } |
881 | ||
4d57b86d | 882 | struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index) |
43f3eae1 JK |
883 | { |
884 | struct address_space *mapping = inode->i_mapping; | |
885 | struct page *page; | |
886 | ||
887 | page = find_get_page(mapping, index); | |
888 | if (page && PageUptodate(page)) | |
889 | return page; | |
890 | f2fs_put_page(page, 0); | |
891 | ||
4d57b86d | 892 | page = f2fs_get_read_data_page(inode, index, 0, false); |
43f3eae1 JK |
893 | if (IS_ERR(page)) |
894 | return page; | |
895 | ||
896 | if (PageUptodate(page)) | |
897 | return page; | |
898 | ||
899 | wait_on_page_locked(page); | |
900 | if (unlikely(!PageUptodate(page))) { | |
901 | f2fs_put_page(page, 0); | |
902 | return ERR_PTR(-EIO); | |
903 | } | |
904 | return page; | |
905 | } | |
906 | ||
907 | /* | |
908 | * If it tries to access a hole, return an error. | |
909 | * Because, the callers, functions in dir.c and GC, should be able to know | |
910 | * whether this page exists or not. | |
911 | */ | |
4d57b86d | 912 | struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index, |
a56c7c6f | 913 | bool for_write) |
43f3eae1 JK |
914 | { |
915 | struct address_space *mapping = inode->i_mapping; | |
916 | struct page *page; | |
917 | repeat: | |
4d57b86d | 918 | page = f2fs_get_read_data_page(inode, index, 0, for_write); |
43f3eae1 JK |
919 | if (IS_ERR(page)) |
920 | return page; | |
393ff91f | 921 | |
43f3eae1 | 922 | /* wait for read completion */ |
393ff91f | 923 | lock_page(page); |
6bacf52f | 924 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
925 | f2fs_put_page(page, 1); |
926 | goto repeat; | |
eb47b800 | 927 | } |
1563ac75 CY |
928 | if (unlikely(!PageUptodate(page))) { |
929 | f2fs_put_page(page, 1); | |
930 | return ERR_PTR(-EIO); | |
931 | } | |
eb47b800 JK |
932 | return page; |
933 | } | |
934 | ||
0a8165d7 | 935 | /* |
eb47b800 JK |
936 | * Caller ensures that this data page is never allocated. |
937 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 938 | * |
4f4124d0 CY |
939 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
940 | * f2fs_unlock_op(). | |
470f00e9 CY |
941 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
942 | * ipage should be released by this function. | |
eb47b800 | 943 | */ |
4d57b86d | 944 | struct page *f2fs_get_new_data_page(struct inode *inode, |
a8865372 | 945 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 946 | { |
eb47b800 JK |
947 | struct address_space *mapping = inode->i_mapping; |
948 | struct page *page; | |
949 | struct dnode_of_data dn; | |
950 | int err; | |
7612118a | 951 | |
a56c7c6f | 952 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
953 | if (!page) { |
954 | /* | |
955 | * before exiting, we should make sure ipage will be released | |
956 | * if any error occur. | |
957 | */ | |
958 | f2fs_put_page(ipage, 1); | |
01f28610 | 959 | return ERR_PTR(-ENOMEM); |
470f00e9 | 960 | } |
eb47b800 | 961 | |
a8865372 | 962 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 963 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
964 | if (err) { |
965 | f2fs_put_page(page, 1); | |
eb47b800 | 966 | return ERR_PTR(err); |
a8865372 | 967 | } |
01f28610 JK |
968 | if (!ipage) |
969 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
970 | |
971 | if (PageUptodate(page)) | |
01f28610 | 972 | goto got_it; |
eb47b800 JK |
973 | |
974 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 975 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
976 | if (!PageUptodate(page)) |
977 | SetPageUptodate(page); | |
eb47b800 | 978 | } else { |
4375a336 | 979 | f2fs_put_page(page, 1); |
a8865372 | 980 | |
7612118a JK |
981 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
982 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
4d57b86d | 983 | page = f2fs_get_lock_data_page(inode, index, true); |
4375a336 | 984 | if (IS_ERR(page)) |
7612118a | 985 | return page; |
eb47b800 | 986 | } |
01f28610 | 987 | got_it: |
9edcdabf | 988 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 989 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 990 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
991 | return page; |
992 | } | |
993 | ||
d5097be5 | 994 | static int __allocate_data_block(struct dnode_of_data *dn, int seg_type) |
bfad7c2d | 995 | { |
4081363f | 996 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 997 | struct f2fs_summary sum; |
bfad7c2d | 998 | struct node_info ni; |
6aa58d8a | 999 | block_t old_blkaddr; |
46008c6d | 1000 | blkcnt_t count = 1; |
0abd675e | 1001 | int err; |
bfad7c2d | 1002 | |
91942321 | 1003 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 1004 | return -EPERM; |
df6136ef | 1005 | |
7735730d CY |
1006 | err = f2fs_get_node_info(sbi, dn->nid, &ni); |
1007 | if (err) | |
1008 | return err; | |
1009 | ||
7a2af766 CY |
1010 | dn->data_blkaddr = datablock_addr(dn->inode, |
1011 | dn->node_page, dn->ofs_in_node); | |
f847c699 | 1012 | if (dn->data_blkaddr != NULL_ADDR) |
df6136ef CY |
1013 | goto alloc; |
1014 | ||
0abd675e CY |
1015 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
1016 | return err; | |
bfad7c2d | 1017 | |
df6136ef | 1018 | alloc: |
bfad7c2d | 1019 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); |
6aa58d8a CY |
1020 | old_blkaddr = dn->data_blkaddr; |
1021 | f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr, | |
d5097be5 | 1022 | &sum, seg_type, NULL, false); |
6aa58d8a CY |
1023 | if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) |
1024 | invalidate_mapping_pages(META_MAPPING(sbi), | |
1025 | old_blkaddr, old_blkaddr); | |
4d57b86d | 1026 | f2fs_set_data_blkaddr(dn); |
bfad7c2d | 1027 | |
0a4daae5 JK |
1028 | /* |
1029 | * i_size will be updated by direct_IO. Otherwise, we'll get stale | |
1030 | * data from unwritten block via dio_read. | |
1031 | */ | |
bfad7c2d JK |
1032 | return 0; |
1033 | } | |
1034 | ||
a7de6086 | 1035 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 1036 | { |
b439b103 | 1037 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 1038 | struct f2fs_map_blocks map; |
d6d478a1 | 1039 | int flag; |
a7de6086 | 1040 | int err = 0; |
d6d478a1 | 1041 | bool direct_io = iocb->ki_flags & IOCB_DIRECT; |
59b802e5 | 1042 | |
71ad682c | 1043 | /* convert inline data for Direct I/O*/ |
d6d478a1 | 1044 | if (direct_io) { |
71ad682c WG |
1045 | err = f2fs_convert_inline_inode(inode); |
1046 | if (err) | |
1047 | return err; | |
1048 | } | |
1049 | ||
f9d6d059 CY |
1050 | if (direct_io && allow_outplace_dio(inode, iocb, from)) |
1051 | return 0; | |
1052 | ||
dc91de78 JK |
1053 | if (is_inode_flag_set(inode, FI_NO_PREALLOC)) |
1054 | return 0; | |
1055 | ||
0080c507 | 1056 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
1057 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
1058 | if (map.m_len > map.m_lblk) | |
1059 | map.m_len -= map.m_lblk; | |
1060 | else | |
1061 | map.m_len = 0; | |
1062 | ||
da85985c | 1063 | map.m_next_pgofs = NULL; |
c4020b2d | 1064 | map.m_next_extent = NULL; |
d5097be5 | 1065 | map.m_seg_type = NO_CHECK_TYPE; |
f9d6d059 | 1066 | map.m_may_create = true; |
2a340760 | 1067 | |
d6d478a1 | 1068 | if (direct_io) { |
4d57b86d | 1069 | map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint); |
f847c699 | 1070 | flag = f2fs_force_buffered_io(inode, iocb, from) ? |
d6d478a1 CY |
1071 | F2FS_GET_BLOCK_PRE_AIO : |
1072 | F2FS_GET_BLOCK_PRE_DIO; | |
1073 | goto map_blocks; | |
d5097be5 | 1074 | } |
f2470371 | 1075 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) { |
a7de6086 JK |
1076 | err = f2fs_convert_inline_inode(inode); |
1077 | if (err) | |
1078 | return err; | |
b439b103 | 1079 | } |
d6d478a1 | 1080 | if (f2fs_has_inline_data(inode)) |
25006645 | 1081 | return err; |
d6d478a1 CY |
1082 | |
1083 | flag = F2FS_GET_BLOCK_PRE_AIO; | |
1084 | ||
1085 | map_blocks: | |
1086 | err = f2fs_map_blocks(inode, &map, 1, flag); | |
1087 | if (map.m_len > 0 && err == -ENOSPC) { | |
1088 | if (!direct_io) | |
1089 | set_inode_flag(inode, FI_NO_PREALLOC); | |
1090 | err = 0; | |
25006645 | 1091 | } |
a7de6086 | 1092 | return err; |
59b802e5 JK |
1093 | } |
1094 | ||
39a86958 | 1095 | void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock) |
59c9081b YH |
1096 | { |
1097 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { | |
1098 | if (lock) | |
1099 | down_read(&sbi->node_change); | |
1100 | else | |
1101 | up_read(&sbi->node_change); | |
1102 | } else { | |
1103 | if (lock) | |
1104 | f2fs_lock_op(sbi); | |
1105 | else | |
1106 | f2fs_unlock_op(sbi); | |
1107 | } | |
1108 | } | |
1109 | ||
0a8165d7 | 1110 | /* |
003a3e1d JK |
1111 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
1112 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
1113 | * If original data blocks are allocated, then give them to blockdev. |
1114 | * Otherwise, | |
1115 | * a. preallocate requested block addresses | |
1116 | * b. do not use extent cache for better performance | |
1117 | * c. give the block addresses to blockdev | |
eb47b800 | 1118 | */ |
d323d005 | 1119 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 1120 | int create, int flag) |
eb47b800 | 1121 | { |
003a3e1d | 1122 | unsigned int maxblocks = map->m_len; |
eb47b800 | 1123 | struct dnode_of_data dn; |
f9811703 | 1124 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
f9d6d059 | 1125 | int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 1126 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 1127 | int err = 0, ofs = 1; |
46008c6d CY |
1128 | unsigned int ofs_in_node, last_ofs_in_node; |
1129 | blkcnt_t prealloc; | |
e15882b6 | 1130 | struct extent_info ei = {0,0,0}; |
7df3a431 | 1131 | block_t blkaddr; |
c4020b2d | 1132 | unsigned int start_pgofs; |
eb47b800 | 1133 | |
dfd02e4d CY |
1134 | if (!maxblocks) |
1135 | return 0; | |
1136 | ||
003a3e1d JK |
1137 | map->m_len = 0; |
1138 | map->m_flags = 0; | |
1139 | ||
1140 | /* it only supports block size == page size */ | |
1141 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 1142 | end = pgofs + maxblocks; |
eb47b800 | 1143 | |
24b84912 | 1144 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
f4f0b677 JZ |
1145 | if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO && |
1146 | map->m_may_create) | |
1147 | goto next_dnode; | |
1148 | ||
003a3e1d JK |
1149 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
1150 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
1151 | map->m_flags = F2FS_MAP_MAPPED; | |
c4020b2d CY |
1152 | if (map->m_next_extent) |
1153 | *map->m_next_extent = pgofs + map->m_len; | |
1e78e8bd ST |
1154 | |
1155 | /* for hardware encryption, but to avoid potential issue in future */ | |
1156 | if (flag == F2FS_GET_BLOCK_DIO) | |
1157 | f2fs_wait_on_block_writeback_range(inode, | |
1158 | map->m_pblk, map->m_len); | |
bfad7c2d | 1159 | goto out; |
a2e7d1bf | 1160 | } |
bfad7c2d | 1161 | |
4fe71e88 | 1162 | next_dnode: |
f9d6d059 | 1163 | if (map->m_may_create) |
59c9081b | 1164 | __do_map_lock(sbi, flag, true); |
eb47b800 JK |
1165 | |
1166 | /* When reading holes, we need its node page */ | |
1167 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
4d57b86d | 1168 | err = f2fs_get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 1169 | if (err) { |
43473f96 CY |
1170 | if (flag == F2FS_GET_BLOCK_BMAP) |
1171 | map->m_pblk = 0; | |
da85985c | 1172 | if (err == -ENOENT) { |
bfad7c2d | 1173 | err = 0; |
da85985c CY |
1174 | if (map->m_next_pgofs) |
1175 | *map->m_next_pgofs = | |
4d57b86d | 1176 | f2fs_get_next_page_offset(&dn, pgofs); |
c4020b2d CY |
1177 | if (map->m_next_extent) |
1178 | *map->m_next_extent = | |
4d57b86d | 1179 | f2fs_get_next_page_offset(&dn, pgofs); |
da85985c | 1180 | } |
bfad7c2d | 1181 | goto unlock_out; |
848753aa | 1182 | } |
973163fc | 1183 | |
c4020b2d | 1184 | start_pgofs = pgofs; |
46008c6d | 1185 | prealloc = 0; |
230436b3 | 1186 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 1187 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
1188 | |
1189 | next_block: | |
7a2af766 | 1190 | blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node); |
4fe71e88 | 1191 | |
c9b60788 | 1192 | if (__is_valid_data_blkaddr(blkaddr) && |
93770ab7 | 1193 | !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) { |
10f966bb | 1194 | err = -EFSCORRUPTED; |
c9b60788 CY |
1195 | goto sync_out; |
1196 | } | |
1197 | ||
93770ab7 | 1198 | if (__is_valid_data_blkaddr(blkaddr)) { |
f847c699 | 1199 | /* use out-place-update for driect IO under LFS mode */ |
f9d6d059 CY |
1200 | if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO && |
1201 | map->m_may_create) { | |
f847c699 | 1202 | err = __allocate_data_block(&dn, map->m_seg_type); |
73c0a927 JZ |
1203 | if (!err) { |
1204 | blkaddr = dn.data_blkaddr; | |
f847c699 | 1205 | set_inode_flag(inode, FI_APPEND_WRITE); |
73c0a927 | 1206 | } |
f847c699 CY |
1207 | } |
1208 | } else { | |
973163fc | 1209 | if (create) { |
f9811703 CY |
1210 | if (unlikely(f2fs_cp_error(sbi))) { |
1211 | err = -EIO; | |
4fe71e88 | 1212 | goto sync_out; |
f9811703 | 1213 | } |
24b84912 | 1214 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
1215 | if (blkaddr == NULL_ADDR) { |
1216 | prealloc++; | |
1217 | last_ofs_in_node = dn.ofs_in_node; | |
1218 | } | |
24b84912 | 1219 | } else { |
0a4daae5 JK |
1220 | WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO && |
1221 | flag != F2FS_GET_BLOCK_DIO); | |
d5097be5 HL |
1222 | err = __allocate_data_block(&dn, |
1223 | map->m_seg_type); | |
6f2d8ed6 | 1224 | if (!err) |
91942321 | 1225 | set_inode_flag(inode, FI_APPEND_WRITE); |
24b84912 | 1226 | } |
973163fc | 1227 | if (err) |
4fe71e88 | 1228 | goto sync_out; |
3f2be043 | 1229 | map->m_flags |= F2FS_MAP_NEW; |
4fe71e88 | 1230 | blkaddr = dn.data_blkaddr; |
973163fc | 1231 | } else { |
43473f96 CY |
1232 | if (flag == F2FS_GET_BLOCK_BMAP) { |
1233 | map->m_pblk = 0; | |
1234 | goto sync_out; | |
1235 | } | |
c4020b2d CY |
1236 | if (flag == F2FS_GET_BLOCK_PRECACHE) |
1237 | goto sync_out; | |
da85985c CY |
1238 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
1239 | blkaddr == NULL_ADDR) { | |
1240 | if (map->m_next_pgofs) | |
1241 | *map->m_next_pgofs = pgofs + 1; | |
4c2ac6a8 | 1242 | goto sync_out; |
da85985c | 1243 | } |
f3d98e74 CY |
1244 | if (flag != F2FS_GET_BLOCK_FIEMAP) { |
1245 | /* for defragment case */ | |
1246 | if (map->m_next_pgofs) | |
1247 | *map->m_next_pgofs = pgofs + 1; | |
4fe71e88 | 1248 | goto sync_out; |
f3d98e74 | 1249 | } |
e2b4e2bc | 1250 | } |
e2b4e2bc | 1251 | } |
eb47b800 | 1252 | |
46008c6d CY |
1253 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
1254 | goto skip; | |
1255 | ||
4fe71e88 CY |
1256 | if (map->m_len == 0) { |
1257 | /* preallocated unwritten block should be mapped for fiemap. */ | |
1258 | if (blkaddr == NEW_ADDR) | |
1259 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
1260 | map->m_flags |= F2FS_MAP_MAPPED; | |
1261 | ||
1262 | map->m_pblk = blkaddr; | |
1263 | map->m_len = 1; | |
1264 | } else if ((map->m_pblk != NEW_ADDR && | |
1265 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 1266 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 1267 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
1268 | ofs++; |
1269 | map->m_len++; | |
1270 | } else { | |
1271 | goto sync_out; | |
1272 | } | |
bfad7c2d | 1273 | |
46008c6d | 1274 | skip: |
bfad7c2d JK |
1275 | dn.ofs_in_node++; |
1276 | pgofs++; | |
1277 | ||
46008c6d CY |
1278 | /* preallocate blocks in batch for one dnode page */ |
1279 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
1280 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 1281 | |
46008c6d | 1282 | dn.ofs_in_node = ofs_in_node; |
4d57b86d | 1283 | err = f2fs_reserve_new_blocks(&dn, prealloc); |
46008c6d CY |
1284 | if (err) |
1285 | goto sync_out; | |
bfad7c2d | 1286 | |
46008c6d CY |
1287 | map->m_len += dn.ofs_in_node - ofs_in_node; |
1288 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
1289 | err = -ENOSPC; | |
1290 | goto sync_out; | |
3104af35 | 1291 | } |
46008c6d CY |
1292 | dn.ofs_in_node = end_offset; |
1293 | } | |
1294 | ||
1295 | if (pgofs >= end) | |
1296 | goto sync_out; | |
1297 | else if (dn.ofs_in_node < end_offset) | |
1298 | goto next_block; | |
1299 | ||
c4020b2d CY |
1300 | if (flag == F2FS_GET_BLOCK_PRECACHE) { |
1301 | if (map->m_flags & F2FS_MAP_MAPPED) { | |
1302 | unsigned int ofs = start_pgofs - map->m_lblk; | |
1303 | ||
1304 | f2fs_update_extent_cache_range(&dn, | |
1305 | start_pgofs, map->m_pblk + ofs, | |
1306 | map->m_len - ofs); | |
1307 | } | |
1308 | } | |
1309 | ||
46008c6d CY |
1310 | f2fs_put_dnode(&dn); |
1311 | ||
f9d6d059 | 1312 | if (map->m_may_create) { |
59c9081b | 1313 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 1314 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 1315 | } |
46008c6d | 1316 | goto next_dnode; |
7df3a431 | 1317 | |
bfad7c2d | 1318 | sync_out: |
1e78e8bd ST |
1319 | |
1320 | /* for hardware encryption, but to avoid potential issue in future */ | |
1321 | if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED) | |
1322 | f2fs_wait_on_block_writeback_range(inode, | |
1323 | map->m_pblk, map->m_len); | |
1324 | ||
c4020b2d CY |
1325 | if (flag == F2FS_GET_BLOCK_PRECACHE) { |
1326 | if (map->m_flags & F2FS_MAP_MAPPED) { | |
1327 | unsigned int ofs = start_pgofs - map->m_lblk; | |
1328 | ||
1329 | f2fs_update_extent_cache_range(&dn, | |
1330 | start_pgofs, map->m_pblk + ofs, | |
1331 | map->m_len - ofs); | |
1332 | } | |
1333 | if (map->m_next_extent) | |
1334 | *map->m_next_extent = pgofs + 1; | |
1335 | } | |
eb47b800 | 1336 | f2fs_put_dnode(&dn); |
bfad7c2d | 1337 | unlock_out: |
f9d6d059 | 1338 | if (map->m_may_create) { |
59c9081b | 1339 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 1340 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 1341 | } |
bfad7c2d | 1342 | out: |
003a3e1d | 1343 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 1344 | return err; |
eb47b800 JK |
1345 | } |
1346 | ||
b91050a8 HL |
1347 | bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len) |
1348 | { | |
1349 | struct f2fs_map_blocks map; | |
1350 | block_t last_lblk; | |
1351 | int err; | |
1352 | ||
1353 | if (pos + len > i_size_read(inode)) | |
1354 | return false; | |
1355 | ||
1356 | map.m_lblk = F2FS_BYTES_TO_BLK(pos); | |
1357 | map.m_next_pgofs = NULL; | |
1358 | map.m_next_extent = NULL; | |
1359 | map.m_seg_type = NO_CHECK_TYPE; | |
f4f0b677 | 1360 | map.m_may_create = false; |
b91050a8 HL |
1361 | last_lblk = F2FS_BLK_ALIGN(pos + len); |
1362 | ||
1363 | while (map.m_lblk < last_lblk) { | |
1364 | map.m_len = last_lblk - map.m_lblk; | |
1365 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT); | |
1366 | if (err || map.m_len == 0) | |
1367 | return false; | |
1368 | map.m_lblk += map.m_len; | |
1369 | } | |
1370 | return true; | |
1371 | } | |
1372 | ||
003a3e1d | 1373 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c | 1374 | struct buffer_head *bh, int create, int flag, |
f9d6d059 | 1375 | pgoff_t *next_pgofs, int seg_type, bool may_write) |
003a3e1d JK |
1376 | { |
1377 | struct f2fs_map_blocks map; | |
a7de6086 | 1378 | int err; |
003a3e1d JK |
1379 | |
1380 | map.m_lblk = iblock; | |
1381 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 1382 | map.m_next_pgofs = next_pgofs; |
c4020b2d | 1383 | map.m_next_extent = NULL; |
d5097be5 | 1384 | map.m_seg_type = seg_type; |
f9d6d059 | 1385 | map.m_may_create = may_write; |
003a3e1d | 1386 | |
a7de6086 JK |
1387 | err = f2fs_map_blocks(inode, &map, create, flag); |
1388 | if (!err) { | |
003a3e1d JK |
1389 | map_bh(bh, inode->i_sb, map.m_pblk); |
1390 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
b86e3307 | 1391 | bh->b_size = (u64)map.m_len << inode->i_blkbits; |
003a3e1d | 1392 | } |
a7de6086 | 1393 | return err; |
003a3e1d JK |
1394 | } |
1395 | ||
ccfb3000 | 1396 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
1397 | struct buffer_head *bh_result, int create, int flag, |
1398 | pgoff_t *next_pgofs) | |
e2b4e2bc | 1399 | { |
da85985c | 1400 | return __get_data_block(inode, iblock, bh_result, create, |
d5097be5 | 1401 | flag, next_pgofs, |
f9d6d059 CY |
1402 | NO_CHECK_TYPE, create); |
1403 | } | |
1404 | ||
1405 | static int get_data_block_dio_write(struct inode *inode, sector_t iblock, | |
1406 | struct buffer_head *bh_result, int create) | |
1407 | { | |
1408 | return __get_data_block(inode, iblock, bh_result, create, | |
1409 | F2FS_GET_BLOCK_DIO, NULL, | |
1410 | f2fs_rw_hint_to_seg_type(inode->i_write_hint), | |
75a037f3 | 1411 | IS_SWAPFILE(inode) ? false : true); |
e2b4e2bc CY |
1412 | } |
1413 | ||
1414 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
1415 | struct buffer_head *bh_result, int create) |
1416 | { | |
e2b4e2bc | 1417 | return __get_data_block(inode, iblock, bh_result, create, |
f9d6d059 CY |
1418 | F2FS_GET_BLOCK_DIO, NULL, |
1419 | f2fs_rw_hint_to_seg_type(inode->i_write_hint), | |
1420 | false); | |
ccfb3000 JK |
1421 | } |
1422 | ||
e2b4e2bc | 1423 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
1424 | struct buffer_head *bh_result, int create) |
1425 | { | |
179448bf | 1426 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 1427 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
1428 | return -EFBIG; |
1429 | ||
e2b4e2bc | 1430 | return __get_data_block(inode, iblock, bh_result, create, |
d5097be5 | 1431 | F2FS_GET_BLOCK_BMAP, NULL, |
f9d6d059 | 1432 | NO_CHECK_TYPE, create); |
ccfb3000 JK |
1433 | } |
1434 | ||
7f63eb77 JK |
1435 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
1436 | { | |
1437 | return (offset >> inode->i_blkbits); | |
1438 | } | |
1439 | ||
1440 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
1441 | { | |
1442 | return (blk << inode->i_blkbits); | |
1443 | } | |
1444 | ||
442a9dbd CY |
1445 | static int f2fs_xattr_fiemap(struct inode *inode, |
1446 | struct fiemap_extent_info *fieinfo) | |
1447 | { | |
1448 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1449 | struct page *page; | |
1450 | struct node_info ni; | |
1451 | __u64 phys = 0, len; | |
1452 | __u32 flags; | |
1453 | nid_t xnid = F2FS_I(inode)->i_xattr_nid; | |
1454 | int err = 0; | |
1455 | ||
1456 | if (f2fs_has_inline_xattr(inode)) { | |
1457 | int offset; | |
1458 | ||
1459 | page = f2fs_grab_cache_page(NODE_MAPPING(sbi), | |
1460 | inode->i_ino, false); | |
1461 | if (!page) | |
1462 | return -ENOMEM; | |
1463 | ||
7735730d CY |
1464 | err = f2fs_get_node_info(sbi, inode->i_ino, &ni); |
1465 | if (err) { | |
1466 | f2fs_put_page(page, 1); | |
1467 | return err; | |
1468 | } | |
442a9dbd CY |
1469 | |
1470 | phys = (__u64)blk_to_logical(inode, ni.blk_addr); | |
1471 | offset = offsetof(struct f2fs_inode, i_addr) + | |
1472 | sizeof(__le32) * (DEF_ADDRS_PER_INODE - | |
b323fd28 | 1473 | get_inline_xattr_addrs(inode)); |
442a9dbd CY |
1474 | |
1475 | phys += offset; | |
1476 | len = inline_xattr_size(inode); | |
1477 | ||
1478 | f2fs_put_page(page, 1); | |
1479 | ||
1480 | flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED; | |
1481 | ||
1482 | if (!xnid) | |
1483 | flags |= FIEMAP_EXTENT_LAST; | |
1484 | ||
1485 | err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); | |
1486 | if (err || err == 1) | |
1487 | return err; | |
1488 | } | |
1489 | ||
1490 | if (xnid) { | |
1491 | page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false); | |
1492 | if (!page) | |
1493 | return -ENOMEM; | |
1494 | ||
7735730d CY |
1495 | err = f2fs_get_node_info(sbi, xnid, &ni); |
1496 | if (err) { | |
1497 | f2fs_put_page(page, 1); | |
1498 | return err; | |
1499 | } | |
442a9dbd CY |
1500 | |
1501 | phys = (__u64)blk_to_logical(inode, ni.blk_addr); | |
1502 | len = inode->i_sb->s_blocksize; | |
1503 | ||
1504 | f2fs_put_page(page, 1); | |
1505 | ||
1506 | flags = FIEMAP_EXTENT_LAST; | |
1507 | } | |
1508 | ||
1509 | if (phys) | |
1510 | err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); | |
1511 | ||
1512 | return (err < 0 ? err : 0); | |
1513 | } | |
1514 | ||
9ab70134 JK |
1515 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1516 | u64 start, u64 len) | |
1517 | { | |
7f63eb77 JK |
1518 | struct buffer_head map_bh; |
1519 | sector_t start_blk, last_blk; | |
da85985c | 1520 | pgoff_t next_pgofs; |
7f63eb77 JK |
1521 | u64 logical = 0, phys = 0, size = 0; |
1522 | u32 flags = 0; | |
7f63eb77 JK |
1523 | int ret = 0; |
1524 | ||
c4020b2d CY |
1525 | if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) { |
1526 | ret = f2fs_precache_extents(inode); | |
1527 | if (ret) | |
1528 | return ret; | |
1529 | } | |
1530 | ||
442a9dbd | 1531 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR); |
7f63eb77 JK |
1532 | if (ret) |
1533 | return ret; | |
1534 | ||
f1b43d4c CY |
1535 | inode_lock(inode); |
1536 | ||
442a9dbd CY |
1537 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1538 | ret = f2fs_xattr_fiemap(inode, fieinfo); | |
1539 | goto out; | |
1540 | } | |
1541 | ||
67f8cf3c JK |
1542 | if (f2fs_has_inline_data(inode)) { |
1543 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
1544 | if (ret != -EAGAIN) | |
f1b43d4c | 1545 | goto out; |
67f8cf3c JK |
1546 | } |
1547 | ||
7f63eb77 JK |
1548 | if (logical_to_blk(inode, len) == 0) |
1549 | len = blk_to_logical(inode, 1); | |
1550 | ||
1551 | start_blk = logical_to_blk(inode, start); | |
1552 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 1553 | |
7f63eb77 JK |
1554 | next: |
1555 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
1556 | map_bh.b_size = len; | |
1557 | ||
e2b4e2bc | 1558 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 1559 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
1560 | if (ret) |
1561 | goto out; | |
1562 | ||
1563 | /* HOLE */ | |
1564 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 1565 | start_blk = next_pgofs; |
58736fa6 CY |
1566 | |
1567 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
1568 | F2FS_I_SB(inode)->max_file_blocks)) | |
9a950d52 | 1569 | goto prep_next; |
58736fa6 | 1570 | |
9a950d52 FL |
1571 | flags |= FIEMAP_EXTENT_LAST; |
1572 | } | |
7f63eb77 | 1573 | |
da5af127 | 1574 | if (size) { |
62230e0d | 1575 | if (IS_ENCRYPTED(inode)) |
da5af127 CY |
1576 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; |
1577 | ||
9a950d52 FL |
1578 | ret = fiemap_fill_next_extent(fieinfo, logical, |
1579 | phys, size, flags); | |
da5af127 | 1580 | } |
7f63eb77 | 1581 | |
9a950d52 FL |
1582 | if (start_blk > last_blk || ret) |
1583 | goto out; | |
7f63eb77 | 1584 | |
9a950d52 FL |
1585 | logical = blk_to_logical(inode, start_blk); |
1586 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
1587 | size = map_bh.b_size; | |
1588 | flags = 0; | |
1589 | if (buffer_unwritten(&map_bh)) | |
1590 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 1591 | |
9a950d52 | 1592 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 1593 | |
9a950d52 | 1594 | prep_next: |
7f63eb77 JK |
1595 | cond_resched(); |
1596 | if (fatal_signal_pending(current)) | |
1597 | ret = -EINTR; | |
1598 | else | |
1599 | goto next; | |
1600 | out: | |
1601 | if (ret == 1) | |
1602 | ret = 0; | |
1603 | ||
5955102c | 1604 | inode_unlock(inode); |
7f63eb77 | 1605 | return ret; |
9ab70134 JK |
1606 | } |
1607 | ||
2df0ab04 CY |
1608 | static int f2fs_read_single_page(struct inode *inode, struct page *page, |
1609 | unsigned nr_pages, | |
1610 | struct f2fs_map_blocks *map, | |
1611 | struct bio **bio_ret, | |
1612 | sector_t *last_block_in_bio, | |
1613 | bool is_readahead) | |
1614 | { | |
1615 | struct bio *bio = *bio_ret; | |
1616 | const unsigned blkbits = inode->i_blkbits; | |
1617 | const unsigned blocksize = 1 << blkbits; | |
1618 | sector_t block_in_file; | |
1619 | sector_t last_block; | |
1620 | sector_t last_block_in_file; | |
1621 | sector_t block_nr; | |
1622 | int ret = 0; | |
1623 | ||
4969c06a | 1624 | block_in_file = (sector_t)page_index(page); |
2df0ab04 CY |
1625 | last_block = block_in_file + nr_pages; |
1626 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1627 | blkbits; | |
1628 | if (last_block > last_block_in_file) | |
1629 | last_block = last_block_in_file; | |
1630 | ||
1631 | /* just zeroing out page which is beyond EOF */ | |
1632 | if (block_in_file >= last_block) | |
1633 | goto zero_out; | |
1634 | /* | |
1635 | * Map blocks using the previous result first. | |
1636 | */ | |
1637 | if ((map->m_flags & F2FS_MAP_MAPPED) && | |
1638 | block_in_file > map->m_lblk && | |
1639 | block_in_file < (map->m_lblk + map->m_len)) | |
1640 | goto got_it; | |
1641 | ||
1642 | /* | |
1643 | * Then do more f2fs_map_blocks() calls until we are | |
1644 | * done with this page. | |
1645 | */ | |
1646 | map->m_lblk = block_in_file; | |
1647 | map->m_len = last_block - block_in_file; | |
1648 | ||
1649 | ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT); | |
1650 | if (ret) | |
1651 | goto out; | |
1652 | got_it: | |
1653 | if ((map->m_flags & F2FS_MAP_MAPPED)) { | |
1654 | block_nr = map->m_pblk + block_in_file - map->m_lblk; | |
1655 | SetPageMappedToDisk(page); | |
1656 | ||
4969c06a JK |
1657 | if (!PageUptodate(page) && (!PageSwapCache(page) && |
1658 | !cleancache_get_page(page))) { | |
2df0ab04 CY |
1659 | SetPageUptodate(page); |
1660 | goto confused; | |
1661 | } | |
1662 | ||
1663 | if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr, | |
93770ab7 | 1664 | DATA_GENERIC_ENHANCE_READ)) { |
10f966bb | 1665 | ret = -EFSCORRUPTED; |
2df0ab04 CY |
1666 | goto out; |
1667 | } | |
1668 | } else { | |
1669 | zero_out: | |
1670 | zero_user_segment(page, 0, PAGE_SIZE); | |
1671 | if (!PageUptodate(page)) | |
1672 | SetPageUptodate(page); | |
1673 | unlock_page(page); | |
1674 | goto out; | |
1675 | } | |
1676 | ||
1677 | /* | |
1678 | * This page will go to BIO. Do we need to send this | |
1679 | * BIO off first? | |
1680 | */ | |
8896cbdf CY |
1681 | if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio, |
1682 | *last_block_in_bio, block_nr)) { | |
2df0ab04 CY |
1683 | submit_and_realloc: |
1684 | __submit_bio(F2FS_I_SB(inode), bio, DATA); | |
1685 | bio = NULL; | |
1686 | } | |
1687 | if (bio == NULL) { | |
1688 | bio = f2fs_grab_read_bio(inode, block_nr, nr_pages, | |
1689 | is_readahead ? REQ_RAHEAD : 0); | |
1690 | if (IS_ERR(bio)) { | |
1691 | ret = PTR_ERR(bio); | |
1692 | bio = NULL; | |
1693 | goto out; | |
1694 | } | |
1695 | } | |
1696 | ||
1697 | /* | |
1698 | * If the page is under writeback, we need to wait for | |
1699 | * its completion to see the correct decrypted data. | |
1700 | */ | |
1701 | f2fs_wait_on_block_writeback(inode, block_nr); | |
1702 | ||
1703 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1704 | goto submit_and_realloc; | |
1705 | ||
1706 | inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA); | |
1707 | ClearPageError(page); | |
1708 | *last_block_in_bio = block_nr; | |
1709 | goto out; | |
1710 | confused: | |
1711 | if (bio) { | |
1712 | __submit_bio(F2FS_I_SB(inode), bio, DATA); | |
1713 | bio = NULL; | |
1714 | } | |
1715 | unlock_page(page); | |
1716 | out: | |
1717 | *bio_ret = bio; | |
1718 | return ret; | |
1719 | } | |
1720 | ||
f1e88660 JK |
1721 | /* |
1722 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1723 | * Major change was from block_size == page_size in f2fs by default. | |
e2e59414 JK |
1724 | * |
1725 | * Note that the aops->readpages() function is ONLY used for read-ahead. If | |
1726 | * this function ever deviates from doing just read-ahead, it should either | |
1727 | * use ->readpage() or do the necessary surgery to decouple ->readpages() | |
1728 | * from read-ahead. | |
f1e88660 JK |
1729 | */ |
1730 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1731 | struct list_head *pages, struct page *page, | |
e2e59414 | 1732 | unsigned nr_pages, bool is_readahead) |
f1e88660 JK |
1733 | { |
1734 | struct bio *bio = NULL; | |
f1e88660 JK |
1735 | sector_t last_block_in_bio = 0; |
1736 | struct inode *inode = mapping->host; | |
f1e88660 | 1737 | struct f2fs_map_blocks map; |
2df0ab04 | 1738 | int ret = 0; |
f1e88660 JK |
1739 | |
1740 | map.m_pblk = 0; | |
1741 | map.m_lblk = 0; | |
1742 | map.m_len = 0; | |
1743 | map.m_flags = 0; | |
da85985c | 1744 | map.m_next_pgofs = NULL; |
c4020b2d | 1745 | map.m_next_extent = NULL; |
d5097be5 | 1746 | map.m_seg_type = NO_CHECK_TYPE; |
f9d6d059 | 1747 | map.m_may_create = false; |
f1e88660 | 1748 | |
736c0a74 | 1749 | for (; nr_pages; nr_pages--) { |
f1e88660 | 1750 | if (pages) { |
939afa94 | 1751 | page = list_last_entry(pages, struct page, lru); |
a83d50bc KM |
1752 | |
1753 | prefetchw(&page->flags); | |
f1e88660 JK |
1754 | list_del(&page->lru); |
1755 | if (add_to_page_cache_lru(page, mapping, | |
4969c06a | 1756 | page_index(page), |
8a5c743e | 1757 | readahead_gfp_mask(mapping))) |
f1e88660 JK |
1758 | goto next_page; |
1759 | } | |
1760 | ||
2df0ab04 CY |
1761 | ret = f2fs_read_single_page(inode, page, nr_pages, &map, &bio, |
1762 | &last_block_in_bio, is_readahead); | |
1763 | if (ret) { | |
1764 | SetPageError(page); | |
09cbfeaf | 1765 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 | 1766 | unlock_page(page); |
f1e88660 | 1767 | } |
f1e88660 JK |
1768 | next_page: |
1769 | if (pages) | |
09cbfeaf | 1770 | put_page(page); |
f1e88660 JK |
1771 | } |
1772 | BUG_ON(pages && !list_empty(pages)); | |
1773 | if (bio) | |
4fc29c1a | 1774 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
2df0ab04 | 1775 | return pages ? 0 : ret; |
f1e88660 JK |
1776 | } |
1777 | ||
eb47b800 JK |
1778 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1779 | { | |
4969c06a | 1780 | struct inode *inode = page_file_mapping(page)->host; |
b3d208f9 | 1781 | int ret = -EAGAIN; |
9ffe0fb5 | 1782 | |
c20e89cd CY |
1783 | trace_f2fs_readpage(page, DATA); |
1784 | ||
e1c42045 | 1785 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1786 | if (f2fs_has_inline_data(inode)) |
1787 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1788 | if (ret == -EAGAIN) |
4969c06a JK |
1789 | ret = f2fs_mpage_readpages(page_file_mapping(page), |
1790 | NULL, page, 1, false); | |
9ffe0fb5 | 1791 | return ret; |
eb47b800 JK |
1792 | } |
1793 | ||
1794 | static int f2fs_read_data_pages(struct file *file, | |
1795 | struct address_space *mapping, | |
1796 | struct list_head *pages, unsigned nr_pages) | |
1797 | { | |
71cb4aff | 1798 | struct inode *inode = mapping->host; |
939afa94 | 1799 | struct page *page = list_last_entry(pages, struct page, lru); |
b8c29400 CY |
1800 | |
1801 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1802 | |
1803 | /* If the file has inline data, skip readpages */ | |
1804 | if (f2fs_has_inline_data(inode)) | |
1805 | return 0; | |
1806 | ||
e2e59414 | 1807 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true); |
eb47b800 JK |
1808 | } |
1809 | ||
7eab0c0d HP |
1810 | static int encrypt_one_page(struct f2fs_io_info *fio) |
1811 | { | |
1812 | struct inode *inode = fio->page->mapping->host; | |
6aa58d8a | 1813 | struct page *mpage; |
7eab0c0d HP |
1814 | gfp_t gfp_flags = GFP_NOFS; |
1815 | ||
1958593e | 1816 | if (!f2fs_encrypted_file(inode)) |
7eab0c0d HP |
1817 | return 0; |
1818 | ||
6dbb1796 | 1819 | /* wait for GCed page writeback via META_MAPPING */ |
0ded69f6 | 1820 | f2fs_wait_on_block_writeback(inode, fio->old_blkaddr); |
7eab0c0d HP |
1821 | |
1822 | retry_encrypt: | |
53bc1d85 EB |
1823 | fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(fio->page, |
1824 | PAGE_SIZE, 0, | |
1825 | gfp_flags); | |
6aa58d8a CY |
1826 | if (IS_ERR(fio->encrypted_page)) { |
1827 | /* flush pending IOs and wait for a while in the ENOMEM case */ | |
1828 | if (PTR_ERR(fio->encrypted_page) == -ENOMEM) { | |
1829 | f2fs_flush_merged_writes(fio->sbi); | |
1830 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1831 | gfp_flags |= __GFP_NOFAIL; | |
1832 | goto retry_encrypt; | |
1833 | } | |
1834 | return PTR_ERR(fio->encrypted_page); | |
1835 | } | |
7eab0c0d | 1836 | |
6aa58d8a CY |
1837 | mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr); |
1838 | if (mpage) { | |
1839 | if (PageUptodate(mpage)) | |
1840 | memcpy(page_address(mpage), | |
1841 | page_address(fio->encrypted_page), PAGE_SIZE); | |
1842 | f2fs_put_page(mpage, 1); | |
7eab0c0d | 1843 | } |
6aa58d8a | 1844 | return 0; |
7eab0c0d HP |
1845 | } |
1846 | ||
bb9e3bb8 CY |
1847 | static inline bool check_inplace_update_policy(struct inode *inode, |
1848 | struct f2fs_io_info *fio) | |
7eab0c0d | 1849 | { |
bb9e3bb8 CY |
1850 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1851 | unsigned int policy = SM_I(sbi)->ipu_policy; | |
7eab0c0d | 1852 | |
bb9e3bb8 CY |
1853 | if (policy & (0x1 << F2FS_IPU_FORCE)) |
1854 | return true; | |
4d57b86d | 1855 | if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi)) |
bb9e3bb8 CY |
1856 | return true; |
1857 | if (policy & (0x1 << F2FS_IPU_UTIL) && | |
1858 | utilization(sbi) > SM_I(sbi)->min_ipu_util) | |
1859 | return true; | |
4d57b86d | 1860 | if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) && |
bb9e3bb8 CY |
1861 | utilization(sbi) > SM_I(sbi)->min_ipu_util) |
1862 | return true; | |
1863 | ||
1864 | /* | |
1865 | * IPU for rewrite async pages | |
1866 | */ | |
1867 | if (policy & (0x1 << F2FS_IPU_ASYNC) && | |
1868 | fio && fio->op == REQ_OP_WRITE && | |
1869 | !(fio->op_flags & REQ_SYNC) && | |
62230e0d | 1870 | !IS_ENCRYPTED(inode)) |
bb9e3bb8 CY |
1871 | return true; |
1872 | ||
1873 | /* this is only set during fdatasync */ | |
1874 | if (policy & (0x1 << F2FS_IPU_FSYNC) && | |
1875 | is_inode_flag_set(inode, FI_NEED_IPU)) | |
1876 | return true; | |
1877 | ||
4354994f DR |
1878 | if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) && |
1879 | !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr))) | |
1880 | return true; | |
1881 | ||
bb9e3bb8 CY |
1882 | return false; |
1883 | } | |
1884 | ||
4d57b86d | 1885 | bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio) |
bb9e3bb8 | 1886 | { |
1ad71a27 JK |
1887 | if (f2fs_is_pinned_file(inode)) |
1888 | return true; | |
bb9e3bb8 CY |
1889 | |
1890 | /* if this is cold file, we should overwrite to avoid fragmentation */ | |
1891 | if (file_is_cold(inode)) | |
1892 | return true; | |
1893 | ||
1894 | return check_inplace_update_policy(inode, fio); | |
1895 | } | |
1896 | ||
4d57b86d | 1897 | bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio) |
bb9e3bb8 CY |
1898 | { |
1899 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1900 | ||
1901 | if (test_opt(sbi, LFS)) | |
1902 | return true; | |
1903 | if (S_ISDIR(inode->i_mode)) | |
1904 | return true; | |
af033b2a CY |
1905 | if (IS_NOQUOTA(inode)) |
1906 | return true; | |
bb9e3bb8 CY |
1907 | if (f2fs_is_atomic_file(inode)) |
1908 | return true; | |
1909 | if (fio) { | |
1910 | if (is_cold_data(fio->page)) | |
1911 | return true; | |
1912 | if (IS_ATOMIC_WRITTEN_PAGE(fio->page)) | |
1913 | return true; | |
4354994f DR |
1914 | if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) && |
1915 | f2fs_is_checkpointed_data(sbi, fio->old_blkaddr))) | |
1916 | return true; | |
bb9e3bb8 CY |
1917 | } |
1918 | return false; | |
1919 | } | |
1920 | ||
7eab0c0d HP |
1921 | static inline bool need_inplace_update(struct f2fs_io_info *fio) |
1922 | { | |
1923 | struct inode *inode = fio->page->mapping->host; | |
1924 | ||
4d57b86d | 1925 | if (f2fs_should_update_outplace(inode, fio)) |
7eab0c0d HP |
1926 | return false; |
1927 | ||
4d57b86d | 1928 | return f2fs_should_update_inplace(inode, fio); |
7eab0c0d HP |
1929 | } |
1930 | ||
4d57b86d | 1931 | int f2fs_do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1932 | { |
05ca3632 | 1933 | struct page *page = fio->page; |
eb47b800 | 1934 | struct inode *inode = page->mapping->host; |
eb47b800 | 1935 | struct dnode_of_data dn; |
e959c8f5 | 1936 | struct extent_info ei = {0,0,0}; |
7735730d | 1937 | struct node_info ni; |
e959c8f5 | 1938 | bool ipu_force = false; |
eb47b800 JK |
1939 | int err = 0; |
1940 | ||
1941 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
e959c8f5 HP |
1942 | if (need_inplace_update(fio) && |
1943 | f2fs_lookup_extent_cache(inode, page->index, &ei)) { | |
1944 | fio->old_blkaddr = ei.blk + page->index - ei.fofs; | |
a817737e | 1945 | |
c9b60788 | 1946 | if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, |
93770ab7 | 1947 | DATA_GENERIC_ENHANCE)) |
10f966bb | 1948 | return -EFSCORRUPTED; |
c9b60788 CY |
1949 | |
1950 | ipu_force = true; | |
1951 | fio->need_lock = LOCK_DONE; | |
1952 | goto got_it; | |
e959c8f5 | 1953 | } |
279d6df2 | 1954 | |
d29460e5 JK |
1955 | /* Deadlock due to between page->lock and f2fs_lock_op */ |
1956 | if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi)) | |
1957 | return -EAGAIN; | |
279d6df2 | 1958 | |
4d57b86d | 1959 | err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 | 1960 | if (err) |
279d6df2 | 1961 | goto out; |
eb47b800 | 1962 | |
28bc106b | 1963 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1964 | |
1965 | /* This page is already truncated */ | |
7a9d7548 | 1966 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1967 | ClearPageUptodate(page); |
2baf0781 | 1968 | clear_cold_data(page); |
eb47b800 | 1969 | goto out_writepage; |
2bca1e23 | 1970 | } |
e959c8f5 | 1971 | got_it: |
c9b60788 CY |
1972 | if (__is_valid_data_blkaddr(fio->old_blkaddr) && |
1973 | !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, | |
93770ab7 | 1974 | DATA_GENERIC_ENHANCE)) { |
10f966bb | 1975 | err = -EFSCORRUPTED; |
c9b60788 CY |
1976 | goto out_writepage; |
1977 | } | |
eb47b800 JK |
1978 | /* |
1979 | * If current allocation needs SSR, | |
1980 | * it had better in-place writes for updated data. | |
1981 | */ | |
93770ab7 CY |
1982 | if (ipu_force || |
1983 | (__is_valid_data_blkaddr(fio->old_blkaddr) && | |
7b525dd0 | 1984 | need_inplace_update(fio))) { |
cc15620b JK |
1985 | err = encrypt_one_page(fio); |
1986 | if (err) | |
1987 | goto out_writepage; | |
1988 | ||
1989 | set_page_writeback(page); | |
17c50035 | 1990 | ClearPageError(page); |
279d6df2 | 1991 | f2fs_put_dnode(&dn); |
cc15620b | 1992 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 1993 | f2fs_unlock_op(fio->sbi); |
4d57b86d | 1994 | err = f2fs_inplace_write_data(fio); |
6492a335 CY |
1995 | if (err) { |
1996 | if (f2fs_encrypted_file(inode)) | |
d2d0727b | 1997 | fscrypt_finalize_bounce_page(&fio->encrypted_page); |
6492a335 CY |
1998 | if (PageWriteback(page)) |
1999 | end_page_writeback(page); | |
cd23ffa9 CY |
2000 | } else { |
2001 | set_inode_flag(inode, FI_UPDATE_WRITE); | |
6492a335 | 2002 | } |
7eab0c0d | 2003 | trace_f2fs_do_write_data_page(fio->page, IPU); |
279d6df2 | 2004 | return err; |
eb47b800 | 2005 | } |
279d6df2 | 2006 | |
cc15620b JK |
2007 | if (fio->need_lock == LOCK_RETRY) { |
2008 | if (!f2fs_trylock_op(fio->sbi)) { | |
2009 | err = -EAGAIN; | |
2010 | goto out_writepage; | |
2011 | } | |
2012 | fio->need_lock = LOCK_REQ; | |
2013 | } | |
2014 | ||
7735730d CY |
2015 | err = f2fs_get_node_info(fio->sbi, dn.nid, &ni); |
2016 | if (err) | |
2017 | goto out_writepage; | |
2018 | ||
2019 | fio->version = ni.version; | |
2020 | ||
cc15620b JK |
2021 | err = encrypt_one_page(fio); |
2022 | if (err) | |
2023 | goto out_writepage; | |
2024 | ||
2025 | set_page_writeback(page); | |
17c50035 | 2026 | ClearPageError(page); |
cc15620b | 2027 | |
279d6df2 | 2028 | /* LFS mode write path */ |
4d57b86d | 2029 | f2fs_outplace_write_data(&dn, fio); |
279d6df2 HP |
2030 | trace_f2fs_do_write_data_page(page, OPU); |
2031 | set_inode_flag(inode, FI_APPEND_WRITE); | |
2032 | if (page->index == 0) | |
2033 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
2034 | out_writepage: |
2035 | f2fs_put_dnode(&dn); | |
279d6df2 | 2036 | out: |
cc15620b | 2037 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 2038 | f2fs_unlock_op(fio->sbi); |
eb47b800 JK |
2039 | return err; |
2040 | } | |
2041 | ||
d68f735b | 2042 | static int __write_data_page(struct page *page, bool *submitted, |
8648de2c CY |
2043 | struct bio **bio, |
2044 | sector_t *last_block, | |
b0af6d49 CY |
2045 | struct writeback_control *wbc, |
2046 | enum iostat_type io_type) | |
eb47b800 JK |
2047 | { |
2048 | struct inode *inode = page->mapping->host; | |
4081363f | 2049 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
2050 | loff_t i_size = i_size_read(inode); |
2051 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 2052 | >> PAGE_SHIFT; |
26de9b11 | 2053 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 2054 | unsigned offset = 0; |
39936837 | 2055 | bool need_balance_fs = false; |
eb47b800 | 2056 | int err = 0; |
458e6197 | 2057 | struct f2fs_io_info fio = { |
05ca3632 | 2058 | .sbi = sbi, |
39d787be | 2059 | .ino = inode->i_ino, |
458e6197 | 2060 | .type = DATA, |
04d328de | 2061 | .op = REQ_OP_WRITE, |
7637241e | 2062 | .op_flags = wbc_to_write_flags(wbc), |
e959c8f5 | 2063 | .old_blkaddr = NULL_ADDR, |
05ca3632 | 2064 | .page = page, |
4375a336 | 2065 | .encrypted_page = NULL, |
d68f735b | 2066 | .submitted = false, |
cc15620b | 2067 | .need_lock = LOCK_RETRY, |
b0af6d49 | 2068 | .io_type = io_type, |
578c6478 | 2069 | .io_wbc = wbc, |
8648de2c CY |
2070 | .bio = bio, |
2071 | .last_block = last_block, | |
458e6197 | 2072 | }; |
eb47b800 | 2073 | |
ecda0de3 CY |
2074 | trace_f2fs_writepage(page, DATA); |
2075 | ||
db198ae0 CY |
2076 | /* we should bypass data pages to proceed the kworkder jobs */ |
2077 | if (unlikely(f2fs_cp_error(sbi))) { | |
2078 | mapping_set_error(page->mapping, -EIO); | |
1174abfd CY |
2079 | /* |
2080 | * don't drop any dirty dentry pages for keeping lastest | |
2081 | * directory structure. | |
2082 | */ | |
2083 | if (S_ISDIR(inode->i_mode)) | |
2084 | goto redirty_out; | |
db198ae0 CY |
2085 | goto out; |
2086 | } | |
2087 | ||
0771fcc7 CY |
2088 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
2089 | goto redirty_out; | |
2090 | ||
eb47b800 | 2091 | if (page->index < end_index) |
39936837 | 2092 | goto write; |
eb47b800 JK |
2093 | |
2094 | /* | |
2095 | * If the offset is out-of-range of file size, | |
2096 | * this page does not have to be written to disk. | |
2097 | */ | |
09cbfeaf | 2098 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 2099 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 2100 | goto out; |
eb47b800 | 2101 | |
09cbfeaf | 2102 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 2103 | write: |
1e84371f JK |
2104 | if (f2fs_is_drop_cache(inode)) |
2105 | goto out; | |
e6e5f561 JK |
2106 | /* we should not write 0'th page having journal header */ |
2107 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
2108 | (!wbc->for_reclaim && | |
4d57b86d | 2109 | f2fs_available_free_memory(sbi, BASE_CHECK)))) |
1e84371f | 2110 | goto redirty_out; |
eb47b800 | 2111 | |
39936837 | 2112 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 2113 | if (S_ISDIR(inode->i_mode)) { |
cc15620b | 2114 | fio.need_lock = LOCK_DONE; |
4d57b86d | 2115 | err = f2fs_do_write_data_page(&fio); |
8618b881 JK |
2116 | goto done; |
2117 | } | |
9ffe0fb5 | 2118 | |
8618b881 | 2119 | if (!wbc->for_reclaim) |
39936837 | 2120 | need_balance_fs = true; |
7f3037a5 | 2121 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 2122 | goto redirty_out; |
ef095d19 JK |
2123 | else |
2124 | set_inode_flag(inode, FI_HOT_DATA); | |
eb47b800 | 2125 | |
b3d208f9 | 2126 | err = -EAGAIN; |
dd7b2333 | 2127 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 | 2128 | err = f2fs_write_inline_data(inode, page); |
dd7b2333 YH |
2129 | if (!err) |
2130 | goto out; | |
2131 | } | |
279d6df2 | 2132 | |
cc15620b | 2133 | if (err == -EAGAIN) { |
4d57b86d | 2134 | err = f2fs_do_write_data_page(&fio); |
cc15620b JK |
2135 | if (err == -EAGAIN) { |
2136 | fio.need_lock = LOCK_REQ; | |
4d57b86d | 2137 | err = f2fs_do_write_data_page(&fio); |
cc15620b JK |
2138 | } |
2139 | } | |
a0d00fad | 2140 | |
eb449797 CY |
2141 | if (err) { |
2142 | file_set_keep_isize(inode); | |
2143 | } else { | |
2144 | down_write(&F2FS_I(inode)->i_sem); | |
2145 | if (F2FS_I(inode)->last_disk_size < psize) | |
2146 | F2FS_I(inode)->last_disk_size = psize; | |
2147 | up_write(&F2FS_I(inode)->i_sem); | |
2148 | } | |
279d6df2 | 2149 | |
8618b881 JK |
2150 | done: |
2151 | if (err && err != -ENOENT) | |
2152 | goto redirty_out; | |
eb47b800 | 2153 | |
39936837 | 2154 | out: |
a7ffdbe2 | 2155 | inode_dec_dirty_pages(inode); |
2baf0781 | 2156 | if (err) { |
2bca1e23 | 2157 | ClearPageUptodate(page); |
2baf0781 CY |
2158 | clear_cold_data(page); |
2159 | } | |
0c3a5797 CY |
2160 | |
2161 | if (wbc->for_reclaim) { | |
bab475c5 | 2162 | f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA); |
ef095d19 | 2163 | clear_inode_flag(inode, FI_HOT_DATA); |
4d57b86d | 2164 | f2fs_remove_dirty_inode(inode); |
d68f735b | 2165 | submitted = NULL; |
0c3a5797 CY |
2166 | } |
2167 | ||
eb47b800 | 2168 | unlock_page(page); |
186857c5 | 2169 | if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) && |
8648de2c CY |
2170 | !F2FS_I(inode)->cp_task) { |
2171 | f2fs_submit_ipu_bio(sbi, bio, page); | |
a7881893 | 2172 | f2fs_balance_fs(sbi, need_balance_fs); |
8648de2c | 2173 | } |
0c3a5797 | 2174 | |
d68f735b | 2175 | if (unlikely(f2fs_cp_error(sbi))) { |
8648de2c | 2176 | f2fs_submit_ipu_bio(sbi, bio, page); |
b9109b0e | 2177 | f2fs_submit_merged_write(sbi, DATA); |
d68f735b JK |
2178 | submitted = NULL; |
2179 | } | |
2180 | ||
2181 | if (submitted) | |
2182 | *submitted = fio.submitted; | |
0c3a5797 | 2183 | |
eb47b800 JK |
2184 | return 0; |
2185 | ||
eb47b800 | 2186 | redirty_out: |
76f60268 | 2187 | redirty_page_for_writepage(wbc, page); |
5b19d284 JK |
2188 | /* |
2189 | * pageout() in MM traslates EAGAIN, so calls handle_write_error() | |
2190 | * -> mapping_set_error() -> set_bit(AS_EIO, ...). | |
2191 | * file_write_and_wait_range() will see EIO error, which is critical | |
2192 | * to return value of fsync() followed by atomic_write failure to user. | |
2193 | */ | |
2194 | if (!err || wbc->for_reclaim) | |
0002b61b | 2195 | return AOP_WRITEPAGE_ACTIVATE; |
b230e6ca JK |
2196 | unlock_page(page); |
2197 | return err; | |
fa9150a8 NJ |
2198 | } |
2199 | ||
f566bae8 JK |
2200 | static int f2fs_write_data_page(struct page *page, |
2201 | struct writeback_control *wbc) | |
2202 | { | |
8648de2c | 2203 | return __write_data_page(page, NULL, NULL, NULL, wbc, FS_DATA_IO); |
f566bae8 JK |
2204 | } |
2205 | ||
8f46dcae CY |
2206 | /* |
2207 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
2208 | * The major change is making write step of cold data page separately from | |
2209 | * warm/hot data page. | |
2210 | */ | |
2211 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b0af6d49 CY |
2212 | struct writeback_control *wbc, |
2213 | enum iostat_type io_type) | |
8f46dcae CY |
2214 | { |
2215 | int ret = 0; | |
2216 | int done = 0; | |
2217 | struct pagevec pvec; | |
c29fd0c0 | 2218 | struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); |
8648de2c CY |
2219 | struct bio *bio = NULL; |
2220 | sector_t last_block; | |
8f46dcae CY |
2221 | int nr_pages; |
2222 | pgoff_t uninitialized_var(writeback_index); | |
2223 | pgoff_t index; | |
2224 | pgoff_t end; /* Inclusive */ | |
2225 | pgoff_t done_index; | |
2226 | int cycled; | |
2227 | int range_whole = 0; | |
10bbd235 | 2228 | xa_mark_t tag; |
bab475c5 | 2229 | int nwritten = 0; |
8f46dcae | 2230 | |
86679820 | 2231 | pagevec_init(&pvec); |
46ae957f | 2232 | |
ef095d19 JK |
2233 | if (get_dirty_pages(mapping->host) <= |
2234 | SM_I(F2FS_M_SB(mapping))->min_hot_blocks) | |
2235 | set_inode_flag(mapping->host, FI_HOT_DATA); | |
2236 | else | |
2237 | clear_inode_flag(mapping->host, FI_HOT_DATA); | |
2238 | ||
8f46dcae CY |
2239 | if (wbc->range_cyclic) { |
2240 | writeback_index = mapping->writeback_index; /* prev offset */ | |
2241 | index = writeback_index; | |
2242 | if (index == 0) | |
2243 | cycled = 1; | |
2244 | else | |
2245 | cycled = 0; | |
2246 | end = -1; | |
2247 | } else { | |
09cbfeaf KS |
2248 | index = wbc->range_start >> PAGE_SHIFT; |
2249 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
2250 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
2251 | range_whole = 1; | |
2252 | cycled = 1; /* ignore range_cyclic tests */ | |
2253 | } | |
2254 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
2255 | tag = PAGECACHE_TAG_TOWRITE; | |
2256 | else | |
2257 | tag = PAGECACHE_TAG_DIRTY; | |
2258 | retry: | |
2259 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
2260 | tag_pages_for_writeback(mapping, index, end); | |
2261 | done_index = index; | |
2262 | while (!done && (index <= end)) { | |
2263 | int i; | |
2264 | ||
69c4f35d | 2265 | nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, |
67fd707f | 2266 | tag); |
8f46dcae CY |
2267 | if (nr_pages == 0) |
2268 | break; | |
2269 | ||
2270 | for (i = 0; i < nr_pages; i++) { | |
2271 | struct page *page = pvec.pages[i]; | |
d68f735b | 2272 | bool submitted = false; |
8f46dcae | 2273 | |
f8de4331 | 2274 | /* give a priority to WB_SYNC threads */ |
c29fd0c0 | 2275 | if (atomic_read(&sbi->wb_sync_req[DATA]) && |
f8de4331 CY |
2276 | wbc->sync_mode == WB_SYNC_NONE) { |
2277 | done = 1; | |
2278 | break; | |
2279 | } | |
2280 | ||
8f46dcae | 2281 | done_index = page->index; |
d29460e5 | 2282 | retry_write: |
8f46dcae CY |
2283 | lock_page(page); |
2284 | ||
2285 | if (unlikely(page->mapping != mapping)) { | |
2286 | continue_unlock: | |
2287 | unlock_page(page); | |
2288 | continue; | |
2289 | } | |
2290 | ||
2291 | if (!PageDirty(page)) { | |
2292 | /* someone wrote it for us */ | |
2293 | goto continue_unlock; | |
2294 | } | |
2295 | ||
8f46dcae | 2296 | if (PageWriteback(page)) { |
8648de2c | 2297 | if (wbc->sync_mode != WB_SYNC_NONE) { |
fec1d657 | 2298 | f2fs_wait_on_page_writeback(page, |
bae0ee7a | 2299 | DATA, true, true); |
8648de2c CY |
2300 | f2fs_submit_ipu_bio(sbi, &bio, page); |
2301 | } else { | |
8f46dcae | 2302 | goto continue_unlock; |
8648de2c | 2303 | } |
8f46dcae CY |
2304 | } |
2305 | ||
8f46dcae CY |
2306 | if (!clear_page_dirty_for_io(page)) |
2307 | goto continue_unlock; | |
2308 | ||
8648de2c CY |
2309 | ret = __write_data_page(page, &submitted, &bio, |
2310 | &last_block, wbc, io_type); | |
8f46dcae | 2311 | if (unlikely(ret)) { |
0002b61b CY |
2312 | /* |
2313 | * keep nr_to_write, since vfs uses this to | |
2314 | * get # of written pages. | |
2315 | */ | |
2316 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
2317 | unlock_page(page); | |
2318 | ret = 0; | |
2319 | continue; | |
d29460e5 JK |
2320 | } else if (ret == -EAGAIN) { |
2321 | ret = 0; | |
2322 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
2323 | cond_resched(); | |
2324 | congestion_wait(BLK_RW_ASYNC, | |
2325 | HZ/50); | |
2326 | goto retry_write; | |
2327 | } | |
2328 | continue; | |
0002b61b | 2329 | } |
b230e6ca JK |
2330 | done_index = page->index + 1; |
2331 | done = 1; | |
2332 | break; | |
d68f735b | 2333 | } else if (submitted) { |
bab475c5 | 2334 | nwritten++; |
8f46dcae CY |
2335 | } |
2336 | ||
f8de4331 | 2337 | if (--wbc->nr_to_write <= 0 && |
687de7f1 | 2338 | wbc->sync_mode == WB_SYNC_NONE) { |
8f46dcae CY |
2339 | done = 1; |
2340 | break; | |
2341 | } | |
2342 | } | |
2343 | pagevec_release(&pvec); | |
2344 | cond_resched(); | |
2345 | } | |
2346 | ||
8f46dcae CY |
2347 | if (!cycled && !done) { |
2348 | cycled = 1; | |
2349 | index = 0; | |
2350 | end = writeback_index - 1; | |
2351 | goto retry; | |
2352 | } | |
2353 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
2354 | mapping->writeback_index = done_index; | |
2355 | ||
bab475c5 | 2356 | if (nwritten) |
b9109b0e | 2357 | f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host, |
bab475c5 | 2358 | NULL, 0, DATA); |
8648de2c CY |
2359 | /* submit cached bio of IPU write */ |
2360 | if (bio) | |
2361 | __submit_bio(sbi, bio, DATA); | |
6ca56ca4 | 2362 | |
8f46dcae CY |
2363 | return ret; |
2364 | } | |
2365 | ||
853137ce JK |
2366 | static inline bool __should_serialize_io(struct inode *inode, |
2367 | struct writeback_control *wbc) | |
2368 | { | |
2369 | if (!S_ISREG(inode->i_mode)) | |
2370 | return false; | |
af033b2a CY |
2371 | if (IS_NOQUOTA(inode)) |
2372 | return false; | |
040d2bb3 CY |
2373 | /* to avoid deadlock in path of data flush */ |
2374 | if (F2FS_I(inode)->cp_task) | |
2375 | return false; | |
853137ce JK |
2376 | if (wbc->sync_mode != WB_SYNC_ALL) |
2377 | return true; | |
2378 | if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks) | |
2379 | return true; | |
2380 | return false; | |
2381 | } | |
2382 | ||
fc99fe27 | 2383 | static int __f2fs_write_data_pages(struct address_space *mapping, |
b0af6d49 CY |
2384 | struct writeback_control *wbc, |
2385 | enum iostat_type io_type) | |
eb47b800 JK |
2386 | { |
2387 | struct inode *inode = mapping->host; | |
4081363f | 2388 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 2389 | struct blk_plug plug; |
eb47b800 | 2390 | int ret; |
853137ce | 2391 | bool locked = false; |
eb47b800 | 2392 | |
cfb185a1 | 2393 | /* deal with chardevs and other special file */ |
2394 | if (!mapping->a_ops->writepage) | |
2395 | return 0; | |
2396 | ||
6a290544 CY |
2397 | /* skip writing if there is no dirty page in this inode */ |
2398 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
2399 | return 0; | |
2400 | ||
0771fcc7 CY |
2401 | /* during POR, we don't need to trigger writepage at all. */ |
2402 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
2403 | goto skip_write; | |
2404 | ||
af033b2a CY |
2405 | if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) && |
2406 | wbc->sync_mode == WB_SYNC_NONE && | |
a1257023 | 2407 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && |
4d57b86d | 2408 | f2fs_available_free_memory(sbi, DIRTY_DENTS)) |
a1257023 JK |
2409 | goto skip_write; |
2410 | ||
d323d005 | 2411 | /* skip writing during file defragment */ |
91942321 | 2412 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
2413 | goto skip_write; |
2414 | ||
d31c7c3f YH |
2415 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
2416 | ||
687de7f1 JK |
2417 | /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */ |
2418 | if (wbc->sync_mode == WB_SYNC_ALL) | |
c29fd0c0 CY |
2419 | atomic_inc(&sbi->wb_sync_req[DATA]); |
2420 | else if (atomic_read(&sbi->wb_sync_req[DATA])) | |
687de7f1 JK |
2421 | goto skip_write; |
2422 | ||
853137ce JK |
2423 | if (__should_serialize_io(inode, wbc)) { |
2424 | mutex_lock(&sbi->writepages); | |
2425 | locked = true; | |
2426 | } | |
2427 | ||
9dfa1baf | 2428 | blk_start_plug(&plug); |
b0af6d49 | 2429 | ret = f2fs_write_cache_pages(mapping, wbc, io_type); |
9dfa1baf | 2430 | blk_finish_plug(&plug); |
687de7f1 | 2431 | |
853137ce JK |
2432 | if (locked) |
2433 | mutex_unlock(&sbi->writepages); | |
2434 | ||
687de7f1 | 2435 | if (wbc->sync_mode == WB_SYNC_ALL) |
c29fd0c0 | 2436 | atomic_dec(&sbi->wb_sync_req[DATA]); |
28ea6162 JK |
2437 | /* |
2438 | * if some pages were truncated, we cannot guarantee its mapping->host | |
2439 | * to detect pending bios. | |
2440 | */ | |
458e6197 | 2441 | |
4d57b86d | 2442 | f2fs_remove_dirty_inode(inode); |
eb47b800 | 2443 | return ret; |
d3baf95d JK |
2444 | |
2445 | skip_write: | |
a7ffdbe2 | 2446 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 2447 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 2448 | return 0; |
eb47b800 JK |
2449 | } |
2450 | ||
b0af6d49 CY |
2451 | static int f2fs_write_data_pages(struct address_space *mapping, |
2452 | struct writeback_control *wbc) | |
2453 | { | |
2454 | struct inode *inode = mapping->host; | |
2455 | ||
2456 | return __f2fs_write_data_pages(mapping, wbc, | |
2457 | F2FS_I(inode)->cp_task == current ? | |
2458 | FS_CP_DATA_IO : FS_DATA_IO); | |
2459 | } | |
2460 | ||
3aab8f82 CY |
2461 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
2462 | { | |
2463 | struct inode *inode = mapping->host; | |
819d9153 | 2464 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 2465 | |
819d9153 | 2466 | if (to > i_size) { |
a33c1502 | 2467 | down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
6f8d4455 | 2468 | down_write(&F2FS_I(inode)->i_mmap_sem); |
a33c1502 | 2469 | |
819d9153 | 2470 | truncate_pagecache(inode, i_size); |
c42d28ce CY |
2471 | if (!IS_NOQUOTA(inode)) |
2472 | f2fs_truncate_blocks(inode, i_size, true); | |
a33c1502 | 2473 | |
5a3a2d83 | 2474 | up_write(&F2FS_I(inode)->i_mmap_sem); |
6f8d4455 | 2475 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
3aab8f82 CY |
2476 | } |
2477 | } | |
2478 | ||
2aadac08 JK |
2479 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
2480 | struct page *page, loff_t pos, unsigned len, | |
2481 | block_t *blk_addr, bool *node_changed) | |
2482 | { | |
2483 | struct inode *inode = page->mapping->host; | |
2484 | pgoff_t index = page->index; | |
2485 | struct dnode_of_data dn; | |
2486 | struct page *ipage; | |
b4d07a3e | 2487 | bool locked = false; |
e15882b6 | 2488 | struct extent_info ei = {0,0,0}; |
2aadac08 | 2489 | int err = 0; |
2866fb16 | 2490 | int flag; |
2aadac08 | 2491 | |
24b84912 JK |
2492 | /* |
2493 | * we already allocated all the blocks, so we don't need to get | |
2494 | * the block addresses when there is no need to fill the page. | |
2495 | */ | |
dc91de78 JK |
2496 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE && |
2497 | !is_inode_flag_set(inode, FI_NO_PREALLOC)) | |
24b84912 JK |
2498 | return 0; |
2499 | ||
2866fb16 SY |
2500 | /* f2fs_lock_op avoids race between write CP and convert_inline_page */ |
2501 | if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode)) | |
2502 | flag = F2FS_GET_BLOCK_DEFAULT; | |
2503 | else | |
2504 | flag = F2FS_GET_BLOCK_PRE_AIO; | |
2505 | ||
b4d07a3e | 2506 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 2507 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
2866fb16 | 2508 | __do_map_lock(sbi, flag, true); |
b4d07a3e JK |
2509 | locked = true; |
2510 | } | |
2511 | restart: | |
2aadac08 | 2512 | /* check inline_data */ |
4d57b86d | 2513 | ipage = f2fs_get_node_page(sbi, inode->i_ino); |
2aadac08 JK |
2514 | if (IS_ERR(ipage)) { |
2515 | err = PTR_ERR(ipage); | |
2516 | goto unlock_out; | |
2517 | } | |
2518 | ||
2519 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
2520 | ||
2521 | if (f2fs_has_inline_data(inode)) { | |
f2470371 | 2522 | if (pos + len <= MAX_INLINE_DATA(inode)) { |
4d57b86d | 2523 | f2fs_do_read_inline_data(page, ipage); |
91942321 | 2524 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
2525 | if (inode->i_nlink) |
2526 | set_inline_node(ipage); | |
2aadac08 JK |
2527 | } else { |
2528 | err = f2fs_convert_inline_page(&dn, page); | |
2529 | if (err) | |
b4d07a3e JK |
2530 | goto out; |
2531 | if (dn.data_blkaddr == NULL_ADDR) | |
2532 | err = f2fs_get_block(&dn, index); | |
2533 | } | |
2534 | } else if (locked) { | |
2535 | err = f2fs_get_block(&dn, index); | |
2536 | } else { | |
2537 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
2538 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
2539 | } else { | |
b4d07a3e | 2540 | /* hole case */ |
4d57b86d | 2541 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); |
4da7bf5a | 2542 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e | 2543 | f2fs_put_dnode(&dn); |
59c9081b YH |
2544 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, |
2545 | true); | |
2866fb16 | 2546 | WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO); |
b4d07a3e JK |
2547 | locked = true; |
2548 | goto restart; | |
2549 | } | |
2aadac08 JK |
2550 | } |
2551 | } | |
b4d07a3e | 2552 | |
2aadac08 JK |
2553 | /* convert_inline_page can make node_changed */ |
2554 | *blk_addr = dn.data_blkaddr; | |
2555 | *node_changed = dn.node_changed; | |
b4d07a3e | 2556 | out: |
2aadac08 JK |
2557 | f2fs_put_dnode(&dn); |
2558 | unlock_out: | |
b4d07a3e | 2559 | if (locked) |
2866fb16 | 2560 | __do_map_lock(sbi, flag, false); |
2aadac08 JK |
2561 | return err; |
2562 | } | |
2563 | ||
eb47b800 JK |
2564 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
2565 | loff_t pos, unsigned len, unsigned flags, | |
2566 | struct page **pagep, void **fsdata) | |
2567 | { | |
2568 | struct inode *inode = mapping->host; | |
4081363f | 2569 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 2570 | struct page *page = NULL; |
09cbfeaf | 2571 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
a2e2e76b | 2572 | bool need_balance = false, drop_atomic = false; |
2aadac08 | 2573 | block_t blkaddr = NULL_ADDR; |
eb47b800 JK |
2574 | int err = 0; |
2575 | ||
62aed044 CY |
2576 | trace_f2fs_write_begin(inode, pos, len, flags); |
2577 | ||
4354994f DR |
2578 | err = f2fs_is_checkpoint_ready(sbi); |
2579 | if (err) | |
2580 | goto fail; | |
2581 | ||
455e3a58 JK |
2582 | if ((f2fs_is_atomic_file(inode) && |
2583 | !f2fs_available_free_memory(sbi, INMEM_PAGES)) || | |
2584 | is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) { | |
57864ae5 | 2585 | err = -ENOMEM; |
a2e2e76b | 2586 | drop_atomic = true; |
57864ae5 JK |
2587 | goto fail; |
2588 | } | |
2589 | ||
5f727395 JK |
2590 | /* |
2591 | * We should check this at this moment to avoid deadlock on inode page | |
2592 | * and #0 page. The locking rule for inline_data conversion should be: | |
2593 | * lock_page(page #0) -> lock_page(inode_page) | |
2594 | */ | |
2595 | if (index != 0) { | |
2596 | err = f2fs_convert_inline_inode(inode); | |
2597 | if (err) | |
2598 | goto fail; | |
2599 | } | |
afcb7ca0 | 2600 | repeat: |
86d54795 JK |
2601 | /* |
2602 | * Do not use grab_cache_page_write_begin() to avoid deadlock due to | |
2603 | * wait_for_stable_page. Will wait that below with our IO control. | |
2604 | */ | |
01eccef7 | 2605 | page = f2fs_pagecache_get_page(mapping, index, |
86d54795 | 2606 | FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS); |
3aab8f82 CY |
2607 | if (!page) { |
2608 | err = -ENOMEM; | |
2609 | goto fail; | |
2610 | } | |
d5f66990 | 2611 | |
eb47b800 JK |
2612 | *pagep = page; |
2613 | ||
2aadac08 JK |
2614 | err = prepare_write_begin(sbi, page, pos, len, |
2615 | &blkaddr, &need_balance); | |
9ba69cf9 | 2616 | if (err) |
2aadac08 | 2617 | goto fail; |
9ba69cf9 | 2618 | |
af033b2a CY |
2619 | if (need_balance && !IS_NOQUOTA(inode) && |
2620 | has_not_enough_free_secs(sbi, 0, 0)) { | |
2a340760 | 2621 | unlock_page(page); |
2c4db1a6 | 2622 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
2623 | lock_page(page); |
2624 | if (page->mapping != mapping) { | |
2625 | /* The page got truncated from under us */ | |
2626 | f2fs_put_page(page, 1); | |
2627 | goto repeat; | |
2628 | } | |
2629 | } | |
2630 | ||
bae0ee7a | 2631 | f2fs_wait_on_page_writeback(page, DATA, false, true); |
b3d208f9 | 2632 | |
649d7df2 JK |
2633 | if (len == PAGE_SIZE || PageUptodate(page)) |
2634 | return 0; | |
eb47b800 | 2635 | |
746e2403 YH |
2636 | if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) { |
2637 | zero_user_segment(page, len, PAGE_SIZE); | |
2638 | return 0; | |
2639 | } | |
2640 | ||
2aadac08 | 2641 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 2642 | zero_user_segment(page, 0, PAGE_SIZE); |
649d7df2 | 2643 | SetPageUptodate(page); |
eb47b800 | 2644 | } else { |
93770ab7 CY |
2645 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, |
2646 | DATA_GENERIC_ENHANCE_READ)) { | |
10f966bb | 2647 | err = -EFSCORRUPTED; |
93770ab7 CY |
2648 | goto fail; |
2649 | } | |
13ba41e3 JK |
2650 | err = f2fs_submit_page_read(inode, page, blkaddr); |
2651 | if (err) | |
78682f79 | 2652 | goto fail; |
d54c795b | 2653 | |
393ff91f | 2654 | lock_page(page); |
6bacf52f | 2655 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
2656 | f2fs_put_page(page, 1); |
2657 | goto repeat; | |
eb47b800 | 2658 | } |
1563ac75 CY |
2659 | if (unlikely(!PageUptodate(page))) { |
2660 | err = -EIO; | |
2661 | goto fail; | |
4375a336 | 2662 | } |
eb47b800 | 2663 | } |
eb47b800 | 2664 | return 0; |
9ba69cf9 | 2665 | |
3aab8f82 | 2666 | fail: |
86531d6b | 2667 | f2fs_put_page(page, 1); |
3aab8f82 | 2668 | f2fs_write_failed(mapping, pos + len); |
a2e2e76b | 2669 | if (drop_atomic) |
4d57b86d | 2670 | f2fs_drop_inmem_pages_all(sbi, false); |
3aab8f82 | 2671 | return err; |
eb47b800 JK |
2672 | } |
2673 | ||
a1dd3c13 JK |
2674 | static int f2fs_write_end(struct file *file, |
2675 | struct address_space *mapping, | |
2676 | loff_t pos, unsigned len, unsigned copied, | |
2677 | struct page *page, void *fsdata) | |
2678 | { | |
2679 | struct inode *inode = page->mapping->host; | |
2680 | ||
dfb2bf38 CY |
2681 | trace_f2fs_write_end(inode, pos, len, copied); |
2682 | ||
649d7df2 JK |
2683 | /* |
2684 | * This should be come from len == PAGE_SIZE, and we expect copied | |
2685 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
2686 | * let generic_perform_write() try to copy data again through copied=0. | |
2687 | */ | |
2688 | if (!PageUptodate(page)) { | |
746e2403 | 2689 | if (unlikely(copied != len)) |
649d7df2 JK |
2690 | copied = 0; |
2691 | else | |
2692 | SetPageUptodate(page); | |
2693 | } | |
2694 | if (!copied) | |
2695 | goto unlock_out; | |
2696 | ||
34ba94ba | 2697 | set_page_dirty(page); |
a1dd3c13 | 2698 | |
fc9581c8 JK |
2699 | if (pos + copied > i_size_read(inode)) |
2700 | f2fs_i_size_write(inode, pos + copied); | |
649d7df2 | 2701 | unlock_out: |
3024c9a1 | 2702 | f2fs_put_page(page, 1); |
d0239e1b | 2703 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
2704 | return copied; |
2705 | } | |
2706 | ||
6f673763 OS |
2707 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
2708 | loff_t offset) | |
944fcfc1 | 2709 | { |
8a56dd96 JK |
2710 | unsigned i_blkbits = READ_ONCE(inode->i_blkbits); |
2711 | unsigned blkbits = i_blkbits; | |
2712 | unsigned blocksize_mask = (1 << blkbits) - 1; | |
2713 | unsigned long align = offset | iov_iter_alignment(iter); | |
2714 | struct block_device *bdev = inode->i_sb->s_bdev; | |
2715 | ||
2716 | if (align & blocksize_mask) { | |
2717 | if (bdev) | |
2718 | blkbits = blksize_bits(bdev_logical_block_size(bdev)); | |
2719 | blocksize_mask = (1 << blkbits) - 1; | |
2720 | if (align & blocksize_mask) | |
2721 | return -EINVAL; | |
2722 | return 1; | |
2723 | } | |
944fcfc1 JK |
2724 | return 0; |
2725 | } | |
2726 | ||
02b16d0a CY |
2727 | static void f2fs_dio_end_io(struct bio *bio) |
2728 | { | |
2729 | struct f2fs_private_dio *dio = bio->bi_private; | |
2730 | ||
2731 | dec_page_count(F2FS_I_SB(dio->inode), | |
2732 | dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ); | |
2733 | ||
2734 | bio->bi_private = dio->orig_private; | |
2735 | bio->bi_end_io = dio->orig_end_io; | |
2736 | ||
5222595d | 2737 | kvfree(dio); |
02b16d0a CY |
2738 | |
2739 | bio_endio(bio); | |
2740 | } | |
2741 | ||
2742 | static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode, | |
2743 | loff_t file_offset) | |
2744 | { | |
2745 | struct f2fs_private_dio *dio; | |
2746 | bool write = (bio_op(bio) == REQ_OP_WRITE); | |
02b16d0a CY |
2747 | |
2748 | dio = f2fs_kzalloc(F2FS_I_SB(inode), | |
2749 | sizeof(struct f2fs_private_dio), GFP_NOFS); | |
8e114038 | 2750 | if (!dio) |
02b16d0a | 2751 | goto out; |
02b16d0a CY |
2752 | |
2753 | dio->inode = inode; | |
2754 | dio->orig_end_io = bio->bi_end_io; | |
2755 | dio->orig_private = bio->bi_private; | |
2756 | dio->write = write; | |
2757 | ||
2758 | bio->bi_end_io = f2fs_dio_end_io; | |
2759 | bio->bi_private = dio; | |
2760 | ||
2761 | inc_page_count(F2FS_I_SB(inode), | |
2762 | write ? F2FS_DIO_WRITE : F2FS_DIO_READ); | |
2763 | ||
2764 | submit_bio(bio); | |
2765 | return; | |
2766 | out: | |
2767 | bio->bi_status = BLK_STS_IOERR; | |
2768 | bio_endio(bio); | |
2769 | } | |
2770 | ||
c8b8e32d | 2771 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 2772 | { |
b439b103 | 2773 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 | 2774 | struct inode *inode = mapping->host; |
0cdd3195 | 2775 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
f847c699 | 2776 | struct f2fs_inode_info *fi = F2FS_I(inode); |
3aab8f82 | 2777 | size_t count = iov_iter_count(iter); |
c8b8e32d | 2778 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 2779 | int rw = iov_iter_rw(iter); |
3aab8f82 | 2780 | int err; |
0cdd3195 | 2781 | enum rw_hint hint = iocb->ki_hint; |
63189b78 | 2782 | int whint_mode = F2FS_OPTION(sbi).whint_mode; |
f847c699 | 2783 | bool do_opu; |
944fcfc1 | 2784 | |
b439b103 | 2785 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 | 2786 | if (err) |
8a56dd96 | 2787 | return err < 0 ? err : 0; |
9ffe0fb5 | 2788 | |
f847c699 | 2789 | if (f2fs_force_buffered_io(inode, iocb, iter)) |
36abef4e | 2790 | return 0; |
fcc85a4d | 2791 | |
f847c699 CY |
2792 | do_opu = allow_outplace_dio(inode, iocb, iter); |
2793 | ||
5302fb00 | 2794 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 2795 | |
0cdd3195 HL |
2796 | if (rw == WRITE && whint_mode == WHINT_MODE_OFF) |
2797 | iocb->ki_hint = WRITE_LIFE_NOT_SET; | |
2798 | ||
f847c699 CY |
2799 | if (iocb->ki_flags & IOCB_NOWAIT) { |
2800 | if (!down_read_trylock(&fi->i_gc_rwsem[rw])) { | |
2801 | iocb->ki_hint = hint; | |
2802 | err = -EAGAIN; | |
2803 | goto out; | |
2804 | } | |
2805 | if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) { | |
2806 | up_read(&fi->i_gc_rwsem[rw]); | |
b91050a8 HL |
2807 | iocb->ki_hint = hint; |
2808 | err = -EAGAIN; | |
2809 | goto out; | |
2810 | } | |
f847c699 CY |
2811 | } else { |
2812 | down_read(&fi->i_gc_rwsem[rw]); | |
2813 | if (do_opu) | |
2814 | down_read(&fi->i_gc_rwsem[READ]); | |
b91050a8 HL |
2815 | } |
2816 | ||
02b16d0a | 2817 | err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, |
f9d6d059 CY |
2818 | iter, rw == WRITE ? get_data_block_dio_write : |
2819 | get_data_block_dio, NULL, f2fs_dio_submit_bio, | |
02b16d0a | 2820 | DIO_LOCKING | DIO_SKIP_HOLES); |
f847c699 CY |
2821 | |
2822 | if (do_opu) | |
2823 | up_read(&fi->i_gc_rwsem[READ]); | |
2824 | ||
2825 | up_read(&fi->i_gc_rwsem[rw]); | |
82e0a5aa CY |
2826 | |
2827 | if (rw == WRITE) { | |
0cdd3195 HL |
2828 | if (whint_mode == WHINT_MODE_OFF) |
2829 | iocb->ki_hint = hint; | |
b0af6d49 CY |
2830 | if (err > 0) { |
2831 | f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO, | |
2832 | err); | |
f847c699 CY |
2833 | if (!do_opu) |
2834 | set_inode_flag(inode, FI_UPDATE_WRITE); | |
b0af6d49 | 2835 | } else if (err < 0) { |
6bfc4919 | 2836 | f2fs_write_failed(mapping, offset + count); |
b0af6d49 | 2837 | } |
6bfc4919 | 2838 | } |
70407fad | 2839 | |
b91050a8 | 2840 | out: |
5302fb00 | 2841 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 2842 | |
3aab8f82 | 2843 | return err; |
eb47b800 JK |
2844 | } |
2845 | ||
487261f3 CY |
2846 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
2847 | unsigned int length) | |
eb47b800 JK |
2848 | { |
2849 | struct inode *inode = page->mapping->host; | |
487261f3 | 2850 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 2851 | |
487261f3 | 2852 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 2853 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
2854 | return; |
2855 | ||
487261f3 | 2856 | if (PageDirty(page)) { |
933439c8 | 2857 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 2858 | dec_page_count(sbi, F2FS_DIRTY_META); |
933439c8 | 2859 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 2860 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
933439c8 | 2861 | } else { |
487261f3 | 2862 | inode_dec_dirty_pages(inode); |
4d57b86d | 2863 | f2fs_remove_dirty_inode(inode); |
933439c8 | 2864 | } |
487261f3 | 2865 | } |
decd36b6 | 2866 | |
2baf0781 CY |
2867 | clear_cold_data(page); |
2868 | ||
decd36b6 | 2869 | if (IS_ATOMIC_WRITTEN_PAGE(page)) |
4d57b86d | 2870 | return f2fs_drop_inmem_page(inode, page); |
decd36b6 | 2871 | |
240a5915 | 2872 | f2fs_clear_page_private(page); |
eb47b800 JK |
2873 | } |
2874 | ||
487261f3 | 2875 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 2876 | { |
f68daeeb JK |
2877 | /* If this is dirty page, keep PagePrivate */ |
2878 | if (PageDirty(page)) | |
2879 | return 0; | |
2880 | ||
decd36b6 CY |
2881 | /* This is atomic written page, keep Private */ |
2882 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
2883 | return 0; | |
2884 | ||
2baf0781 | 2885 | clear_cold_data(page); |
240a5915 | 2886 | f2fs_clear_page_private(page); |
c3850aa1 | 2887 | return 1; |
eb47b800 JK |
2888 | } |
2889 | ||
2890 | static int f2fs_set_data_page_dirty(struct page *page) | |
2891 | { | |
4969c06a | 2892 | struct inode *inode = page_file_mapping(page)->host; |
eb47b800 | 2893 | |
26c6b887 JK |
2894 | trace_f2fs_set_page_dirty(page, DATA); |
2895 | ||
237c0790 JK |
2896 | if (!PageUptodate(page)) |
2897 | SetPageUptodate(page); | |
4969c06a JK |
2898 | if (PageSwapCache(page)) |
2899 | return __set_page_dirty_nobuffers(page); | |
34ba94ba | 2900 | |
5fe45743 | 2901 | if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) { |
decd36b6 | 2902 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
4d57b86d | 2903 | f2fs_register_inmem_page(inode, page); |
decd36b6 CY |
2904 | return 1; |
2905 | } | |
2906 | /* | |
2907 | * Previously, this page has been registered, we just | |
2908 | * return here. | |
2909 | */ | |
2910 | return 0; | |
34ba94ba JK |
2911 | } |
2912 | ||
eb47b800 | 2913 | if (!PageDirty(page)) { |
b87078ad | 2914 | __set_page_dirty_nobuffers(page); |
4d57b86d | 2915 | f2fs_update_dirty_page(inode, page); |
eb47b800 JK |
2916 | return 1; |
2917 | } | |
2918 | return 0; | |
2919 | } | |
2920 | ||
c01e54b7 JK |
2921 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
2922 | { | |
454ae7e5 CY |
2923 | struct inode *inode = mapping->host; |
2924 | ||
1d373a0e JK |
2925 | if (f2fs_has_inline_data(inode)) |
2926 | return 0; | |
2927 | ||
2928 | /* make sure allocating whole blocks */ | |
2929 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
2930 | filemap_write_and_wait(mapping); | |
2931 | ||
e2b4e2bc | 2932 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
2933 | } |
2934 | ||
5b7a487c WG |
2935 | #ifdef CONFIG_MIGRATION |
2936 | #include <linux/migrate.h> | |
2937 | ||
2938 | int f2fs_migrate_page(struct address_space *mapping, | |
2939 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
2940 | { | |
2941 | int rc, extra_count; | |
2942 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
2943 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
2944 | ||
2945 | BUG_ON(PageWriteback(page)); | |
2946 | ||
2947 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
ff1048e7 JK |
2948 | if (atomic_written) { |
2949 | if (mode != MIGRATE_SYNC) | |
2950 | return -EBUSY; | |
2951 | if (!mutex_trylock(&fi->inmem_lock)) | |
2952 | return -EAGAIN; | |
2953 | } | |
5b7a487c | 2954 | |
240a5915 CY |
2955 | /* one extra reference was held for atomic_write page */ |
2956 | extra_count = atomic_written ? 1 : 0; | |
5b7a487c | 2957 | rc = migrate_page_move_mapping(mapping, newpage, |
37109694 | 2958 | page, extra_count); |
5b7a487c WG |
2959 | if (rc != MIGRATEPAGE_SUCCESS) { |
2960 | if (atomic_written) | |
2961 | mutex_unlock(&fi->inmem_lock); | |
2962 | return rc; | |
2963 | } | |
2964 | ||
2965 | if (atomic_written) { | |
2966 | struct inmem_pages *cur; | |
2967 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
2968 | if (cur->page == page) { | |
2969 | cur->page = newpage; | |
2970 | break; | |
2971 | } | |
2972 | mutex_unlock(&fi->inmem_lock); | |
2973 | put_page(page); | |
2974 | get_page(newpage); | |
2975 | } | |
2976 | ||
240a5915 CY |
2977 | if (PagePrivate(page)) { |
2978 | f2fs_set_page_private(newpage, page_private(page)); | |
2979 | f2fs_clear_page_private(page); | |
2980 | } | |
5b7a487c | 2981 | |
2916ecc0 JG |
2982 | if (mode != MIGRATE_SYNC_NO_COPY) |
2983 | migrate_page_copy(newpage, page); | |
2984 | else | |
2985 | migrate_page_states(newpage, page); | |
5b7a487c WG |
2986 | |
2987 | return MIGRATEPAGE_SUCCESS; | |
2988 | } | |
2989 | #endif | |
2990 | ||
4969c06a JK |
2991 | #ifdef CONFIG_SWAP |
2992 | /* Copied from generic_swapfile_activate() to check any holes */ | |
2993 | static int check_swap_activate(struct file *swap_file, unsigned int max) | |
2994 | { | |
2995 | struct address_space *mapping = swap_file->f_mapping; | |
2996 | struct inode *inode = mapping->host; | |
2997 | unsigned blocks_per_page; | |
2998 | unsigned long page_no; | |
2999 | unsigned blkbits; | |
3000 | sector_t probe_block; | |
3001 | sector_t last_block; | |
3002 | sector_t lowest_block = -1; | |
3003 | sector_t highest_block = 0; | |
3004 | ||
3005 | blkbits = inode->i_blkbits; | |
3006 | blocks_per_page = PAGE_SIZE >> blkbits; | |
3007 | ||
3008 | /* | |
3009 | * Map all the blocks into the extent list. This code doesn't try | |
3010 | * to be very smart. | |
3011 | */ | |
3012 | probe_block = 0; | |
3013 | page_no = 0; | |
3014 | last_block = i_size_read(inode) >> blkbits; | |
3015 | while ((probe_block + blocks_per_page) <= last_block && page_no < max) { | |
3016 | unsigned block_in_page; | |
3017 | sector_t first_block; | |
3018 | ||
3019 | cond_resched(); | |
3020 | ||
3021 | first_block = bmap(inode, probe_block); | |
3022 | if (first_block == 0) | |
3023 | goto bad_bmap; | |
3024 | ||
3025 | /* | |
3026 | * It must be PAGE_SIZE aligned on-disk | |
3027 | */ | |
3028 | if (first_block & (blocks_per_page - 1)) { | |
3029 | probe_block++; | |
3030 | goto reprobe; | |
3031 | } | |
3032 | ||
3033 | for (block_in_page = 1; block_in_page < blocks_per_page; | |
3034 | block_in_page++) { | |
3035 | sector_t block; | |
3036 | ||
3037 | block = bmap(inode, probe_block + block_in_page); | |
3038 | if (block == 0) | |
3039 | goto bad_bmap; | |
3040 | if (block != first_block + block_in_page) { | |
3041 | /* Discontiguity */ | |
3042 | probe_block++; | |
3043 | goto reprobe; | |
3044 | } | |
3045 | } | |
3046 | ||
3047 | first_block >>= (PAGE_SHIFT - blkbits); | |
3048 | if (page_no) { /* exclude the header page */ | |
3049 | if (first_block < lowest_block) | |
3050 | lowest_block = first_block; | |
3051 | if (first_block > highest_block) | |
3052 | highest_block = first_block; | |
3053 | } | |
3054 | ||
3055 | page_no++; | |
3056 | probe_block += blocks_per_page; | |
3057 | reprobe: | |
3058 | continue; | |
3059 | } | |
3060 | return 0; | |
3061 | ||
3062 | bad_bmap: | |
3063 | pr_err("swapon: swapfile has holes\n"); | |
3064 | return -EINVAL; | |
3065 | } | |
3066 | ||
3067 | static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file, | |
3068 | sector_t *span) | |
3069 | { | |
3070 | struct inode *inode = file_inode(file); | |
3071 | int ret; | |
3072 | ||
3073 | if (!S_ISREG(inode->i_mode)) | |
3074 | return -EINVAL; | |
3075 | ||
3076 | if (f2fs_readonly(F2FS_I_SB(inode)->sb)) | |
3077 | return -EROFS; | |
3078 | ||
3079 | ret = f2fs_convert_inline_inode(inode); | |
3080 | if (ret) | |
3081 | return ret; | |
3082 | ||
3083 | ret = check_swap_activate(file, sis->max); | |
3084 | if (ret) | |
3085 | return ret; | |
3086 | ||
3087 | set_inode_flag(inode, FI_PIN_FILE); | |
3088 | f2fs_precache_extents(inode); | |
3089 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); | |
3090 | return 0; | |
3091 | } | |
3092 | ||
3093 | static void f2fs_swap_deactivate(struct file *file) | |
3094 | { | |
3095 | struct inode *inode = file_inode(file); | |
3096 | ||
3097 | clear_inode_flag(inode, FI_PIN_FILE); | |
3098 | } | |
3099 | #else | |
3100 | static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file, | |
3101 | sector_t *span) | |
3102 | { | |
3103 | return -EOPNOTSUPP; | |
3104 | } | |
3105 | ||
3106 | static void f2fs_swap_deactivate(struct file *file) | |
3107 | { | |
3108 | } | |
3109 | #endif | |
3110 | ||
eb47b800 JK |
3111 | const struct address_space_operations f2fs_dblock_aops = { |
3112 | .readpage = f2fs_read_data_page, | |
3113 | .readpages = f2fs_read_data_pages, | |
3114 | .writepage = f2fs_write_data_page, | |
3115 | .writepages = f2fs_write_data_pages, | |
3116 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 3117 | .write_end = f2fs_write_end, |
eb47b800 | 3118 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
3119 | .invalidatepage = f2fs_invalidate_page, |
3120 | .releasepage = f2fs_release_page, | |
eb47b800 | 3121 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 3122 | .bmap = f2fs_bmap, |
4969c06a JK |
3123 | .swap_activate = f2fs_swap_activate, |
3124 | .swap_deactivate = f2fs_swap_deactivate, | |
5b7a487c WG |
3125 | #ifdef CONFIG_MIGRATION |
3126 | .migratepage = f2fs_migrate_page, | |
3127 | #endif | |
eb47b800 | 3128 | }; |
6dbb1796 | 3129 | |
5ec2d99d | 3130 | void f2fs_clear_page_cache_dirty_tag(struct page *page) |
aec2f729 CY |
3131 | { |
3132 | struct address_space *mapping = page_mapping(page); | |
3133 | unsigned long flags; | |
3134 | ||
3135 | xa_lock_irqsave(&mapping->i_pages, flags); | |
5ec2d99d | 3136 | __xa_clear_mark(&mapping->i_pages, page_index(page), |
aec2f729 CY |
3137 | PAGECACHE_TAG_DIRTY); |
3138 | xa_unlock_irqrestore(&mapping->i_pages, flags); | |
3139 | } | |
3140 | ||
6dbb1796 EB |
3141 | int __init f2fs_init_post_read_processing(void) |
3142 | { | |
3143 | bio_post_read_ctx_cache = KMEM_CACHE(bio_post_read_ctx, 0); | |
3144 | if (!bio_post_read_ctx_cache) | |
3145 | goto fail; | |
3146 | bio_post_read_ctx_pool = | |
3147 | mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS, | |
3148 | bio_post_read_ctx_cache); | |
3149 | if (!bio_post_read_ctx_pool) | |
3150 | goto fail_free_cache; | |
3151 | return 0; | |
3152 | ||
3153 | fail_free_cache: | |
3154 | kmem_cache_destroy(bio_post_read_ctx_cache); | |
3155 | fail: | |
3156 | return -ENOMEM; | |
3157 | } | |
3158 | ||
3159 | void __exit f2fs_destroy_post_read_processing(void) | |
3160 | { | |
3161 | mempool_destroy(bio_post_read_ctx_pool); | |
3162 | kmem_cache_destroy(bio_post_read_ctx_cache); | |
3163 | } |