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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 | */ | |
b757f6ed | 262 | static struct bio *__bio_alloc(struct f2fs_io_info *fio, int npages) |
940a6d34 | 263 | { |
b757f6ed | 264 | struct f2fs_sb_info *sbi = fio->sbi; |
940a6d34 GZ |
265 | struct bio *bio; |
266 | ||
d62fe971 | 267 | bio = f2fs_bio_alloc(sbi, npages, true); |
940a6d34 | 268 | |
b757f6ed CY |
269 | f2fs_target_device(sbi, fio->new_blkaddr, bio); |
270 | if (is_read_io(fio->op)) { | |
0cdd3195 HL |
271 | bio->bi_end_io = f2fs_read_end_io; |
272 | bio->bi_private = NULL; | |
273 | } else { | |
274 | bio->bi_end_io = f2fs_write_end_io; | |
275 | bio->bi_private = sbi; | |
b757f6ed CY |
276 | bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, |
277 | fio->type, fio->temp); | |
0cdd3195 | 278 | } |
b757f6ed CY |
279 | if (fio->io_wbc) |
280 | wbc_init_bio(fio->io_wbc, bio); | |
940a6d34 GZ |
281 | |
282 | return bio; | |
283 | } | |
284 | ||
4fc29c1a LT |
285 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
286 | struct bio *bio, enum page_type type) | |
f5730184 | 287 | { |
4fc29c1a | 288 | if (!is_read_io(bio_op(bio))) { |
0a595eba JK |
289 | unsigned int start; |
290 | ||
0a595eba JK |
291 | if (type != DATA && type != NODE) |
292 | goto submit_io; | |
293 | ||
66415cee | 294 | if (test_opt(sbi, LFS) && current->plug) |
3bb09a0e TY |
295 | blk_finish_plug(current->plug); |
296 | ||
0a595eba JK |
297 | start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS; |
298 | start %= F2FS_IO_SIZE(sbi); | |
299 | ||
300 | if (start == 0) | |
301 | goto submit_io; | |
302 | ||
303 | /* fill dummy pages */ | |
304 | for (; start < F2FS_IO_SIZE(sbi); start++) { | |
305 | struct page *page = | |
306 | mempool_alloc(sbi->write_io_dummy, | |
bc73a4b2 | 307 | GFP_NOIO | __GFP_NOFAIL); |
0a595eba JK |
308 | f2fs_bug_on(sbi, !page); |
309 | ||
bc73a4b2 | 310 | zero_user_segment(page, 0, PAGE_SIZE); |
0a595eba JK |
311 | SetPagePrivate(page); |
312 | set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE); | |
313 | lock_page(page); | |
314 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) | |
315 | f2fs_bug_on(sbi, 1); | |
316 | } | |
317 | /* | |
318 | * In the NODE case, we lose next block address chain. So, we | |
319 | * need to do checkpoint in f2fs_sync_file. | |
320 | */ | |
321 | if (type == NODE) | |
322 | set_sbi_flag(sbi, SBI_NEED_CP); | |
19a5f5e2 | 323 | } |
0a595eba | 324 | submit_io: |
554b5125 JK |
325 | if (is_read_io(bio_op(bio))) |
326 | trace_f2fs_submit_read_bio(sbi->sb, type, bio); | |
327 | else | |
328 | trace_f2fs_submit_write_bio(sbi->sb, type, bio); | |
4e49ea4a | 329 | submit_bio(bio); |
f5730184 JK |
330 | } |
331 | ||
458e6197 | 332 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 333 | { |
458e6197 | 334 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
335 | |
336 | if (!io->bio) | |
337 | return; | |
338 | ||
554b5125 JK |
339 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
340 | ||
04d328de | 341 | if (is_read_io(fio->op)) |
554b5125 | 342 | trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio); |
6a8f8ca5 | 343 | else |
554b5125 | 344 | trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio); |
04d328de | 345 | |
4fc29c1a | 346 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
347 | io->bio = NULL; |
348 | } | |
349 | ||
8648de2c | 350 | static bool __has_merged_page(struct bio *bio, struct inode *inode, |
bab475c5 | 351 | struct page *page, nid_t ino) |
0fd785eb | 352 | { |
0fd785eb CY |
353 | struct bio_vec *bvec; |
354 | struct page *target; | |
6dc4f100 | 355 | struct bvec_iter_all iter_all; |
0fd785eb | 356 | |
8648de2c | 357 | if (!bio) |
0fd785eb | 358 | return false; |
0c3a5797 | 359 | |
bab475c5 | 360 | if (!inode && !page && !ino) |
0c3a5797 | 361 | return true; |
0fd785eb | 362 | |
8648de2c | 363 | bio_for_each_segment_all(bvec, bio, iter_all) { |
0fd785eb | 364 | |
d2d0727b EB |
365 | target = bvec->bv_page; |
366 | if (fscrypt_is_bounce_page(target)) | |
367 | target = fscrypt_pagecache_page(target); | |
0fd785eb | 368 | |
0c3a5797 CY |
369 | if (inode && inode == target->mapping->host) |
370 | return true; | |
bab475c5 CY |
371 | if (page && page == target) |
372 | return true; | |
0c3a5797 | 373 | if (ino && ino == ino_of_node(target)) |
0fd785eb | 374 | return true; |
0fd785eb CY |
375 | } |
376 | ||
0fd785eb CY |
377 | return false; |
378 | } | |
379 | ||
b9109b0e | 380 | static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi, |
a912b54d | 381 | enum page_type type, enum temp_type temp) |
93dfe2ac JK |
382 | { |
383 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
a912b54d | 384 | struct f2fs_bio_info *io = sbi->write_io[btype] + temp; |
93dfe2ac | 385 | |
df0f8dc0 | 386 | down_write(&io->io_rwsem); |
458e6197 JK |
387 | |
388 | /* change META to META_FLUSH in the checkpoint procedure */ | |
389 | if (type >= META_FLUSH) { | |
390 | io->fio.type = META_FLUSH; | |
04d328de | 391 | io->fio.op = REQ_OP_WRITE; |
3adc5fcb | 392 | io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC; |
70fd7614 | 393 | if (!test_opt(sbi, NOBARRIER)) |
7f54f51f | 394 | io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA; |
458e6197 JK |
395 | } |
396 | __submit_merged_bio(io); | |
df0f8dc0 | 397 | up_write(&io->io_rwsem); |
93dfe2ac JK |
398 | } |
399 | ||
a912b54d | 400 | static void __submit_merged_write_cond(struct f2fs_sb_info *sbi, |
bab475c5 CY |
401 | struct inode *inode, struct page *page, |
402 | nid_t ino, enum page_type type, bool force) | |
0c3a5797 | 403 | { |
a912b54d | 404 | enum temp_type temp; |
1e771e83 | 405 | bool ret = true; |
a912b54d JK |
406 | |
407 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { | |
1e771e83 YS |
408 | if (!force) { |
409 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
410 | struct f2fs_bio_info *io = sbi->write_io[btype] + temp; | |
a912b54d | 411 | |
1e771e83 | 412 | down_read(&io->io_rwsem); |
8648de2c | 413 | ret = __has_merged_page(io->bio, inode, page, ino); |
1e771e83 YS |
414 | up_read(&io->io_rwsem); |
415 | } | |
416 | if (ret) | |
417 | __f2fs_submit_merged_write(sbi, type, temp); | |
a912b54d JK |
418 | |
419 | /* TODO: use HOT temp only for meta pages now. */ | |
420 | if (type >= META) | |
421 | break; | |
422 | } | |
0c3a5797 CY |
423 | } |
424 | ||
b9109b0e | 425 | void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type) |
0c3a5797 | 426 | { |
adcc00f7 | 427 | __submit_merged_write_cond(sbi, NULL, NULL, 0, type, true); |
0c3a5797 CY |
428 | } |
429 | ||
b9109b0e | 430 | void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi, |
bab475c5 CY |
431 | struct inode *inode, struct page *page, |
432 | nid_t ino, enum page_type type) | |
0c3a5797 | 433 | { |
bab475c5 | 434 | __submit_merged_write_cond(sbi, inode, page, ino, type, false); |
0c3a5797 CY |
435 | } |
436 | ||
b9109b0e | 437 | void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi) |
406657dd | 438 | { |
b9109b0e JK |
439 | f2fs_submit_merged_write(sbi, DATA); |
440 | f2fs_submit_merged_write(sbi, NODE); | |
441 | f2fs_submit_merged_write(sbi, META); | |
406657dd CY |
442 | } |
443 | ||
93dfe2ac JK |
444 | /* |
445 | * Fill the locked page with data located in the block address. | |
771a9a71 | 446 | * A caller needs to unlock the page on failure. |
93dfe2ac | 447 | */ |
05ca3632 | 448 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 449 | { |
93dfe2ac | 450 | struct bio *bio; |
0b81d077 JK |
451 | struct page *page = fio->encrypted_page ? |
452 | fio->encrypted_page : fio->page; | |
93dfe2ac | 453 | |
c9b60788 | 454 | if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, |
93770ab7 CY |
455 | fio->is_por ? META_POR : (__is_meta_io(fio) ? |
456 | META_GENERIC : DATA_GENERIC_ENHANCE))) | |
10f966bb | 457 | return -EFSCORRUPTED; |
c9b60788 | 458 | |
2ace38e0 | 459 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 460 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
461 | |
462 | /* Allocate a new bio */ | |
b757f6ed | 463 | bio = __bio_alloc(fio, 1); |
93dfe2ac | 464 | |
09cbfeaf | 465 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 466 | bio_put(bio); |
93dfe2ac JK |
467 | return -EFAULT; |
468 | } | |
78efac53 CY |
469 | |
470 | if (fio->io_wbc && !is_read_io(fio->op)) | |
34e51a5e | 471 | wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE); |
78efac53 | 472 | |
04d328de | 473 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 474 | |
5f9abab4 JK |
475 | inc_page_count(fio->sbi, is_read_io(fio->op) ? |
476 | __read_io_type(page): WB_DATA_TYPE(fio->page)); | |
4c58ed07 CY |
477 | |
478 | __submit_bio(fio->sbi, bio, fio->type); | |
93dfe2ac JK |
479 | return 0; |
480 | } | |
481 | ||
8896cbdf CY |
482 | static bool page_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, |
483 | block_t last_blkaddr, block_t cur_blkaddr) | |
484 | { | |
485 | if (last_blkaddr + 1 != cur_blkaddr) | |
486 | return false; | |
487 | return __same_bdev(sbi, cur_blkaddr, bio); | |
488 | } | |
489 | ||
490 | static bool io_type_is_mergeable(struct f2fs_bio_info *io, | |
491 | struct f2fs_io_info *fio) | |
492 | { | |
493 | if (io->fio.op != fio->op) | |
494 | return false; | |
495 | return io->fio.op_flags == fio->op_flags; | |
496 | } | |
497 | ||
498 | static bool io_is_mergeable(struct f2fs_sb_info *sbi, struct bio *bio, | |
499 | struct f2fs_bio_info *io, | |
500 | struct f2fs_io_info *fio, | |
501 | block_t last_blkaddr, | |
502 | block_t cur_blkaddr) | |
503 | { | |
c72db71e CY |
504 | if (F2FS_IO_ALIGNED(sbi) && (fio->type == DATA || fio->type == NODE)) { |
505 | unsigned int filled_blocks = | |
506 | F2FS_BYTES_TO_BLK(bio->bi_iter.bi_size); | |
507 | unsigned int io_size = F2FS_IO_SIZE(sbi); | |
508 | unsigned int left_vecs = bio->bi_max_vecs - bio->bi_vcnt; | |
509 | ||
510 | /* IOs in bio is aligned and left space of vectors is not enough */ | |
511 | if (!(filled_blocks % io_size) && left_vecs < io_size) | |
512 | return false; | |
513 | } | |
8896cbdf CY |
514 | if (!page_is_mergeable(sbi, bio, last_blkaddr, cur_blkaddr)) |
515 | return false; | |
516 | return io_type_is_mergeable(io, fio); | |
517 | } | |
518 | ||
8648de2c CY |
519 | int f2fs_merge_page_bio(struct f2fs_io_info *fio) |
520 | { | |
521 | struct bio *bio = *fio->bio; | |
522 | struct page *page = fio->encrypted_page ? | |
523 | fio->encrypted_page : fio->page; | |
524 | ||
525 | if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, | |
526 | __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC)) | |
10f966bb | 527 | return -EFSCORRUPTED; |
8648de2c CY |
528 | |
529 | trace_f2fs_submit_page_bio(page, fio); | |
530 | f2fs_trace_ios(fio, 0); | |
531 | ||
8896cbdf CY |
532 | if (bio && !page_is_mergeable(fio->sbi, bio, *fio->last_block, |
533 | fio->new_blkaddr)) { | |
8648de2c CY |
534 | __submit_bio(fio->sbi, bio, fio->type); |
535 | bio = NULL; | |
536 | } | |
537 | alloc_new: | |
538 | if (!bio) { | |
b757f6ed | 539 | bio = __bio_alloc(fio, BIO_MAX_PAGES); |
8648de2c CY |
540 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
541 | } | |
542 | ||
543 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { | |
544 | __submit_bio(fio->sbi, bio, fio->type); | |
545 | bio = NULL; | |
546 | goto alloc_new; | |
547 | } | |
548 | ||
549 | if (fio->io_wbc) | |
9637d517 | 550 | wbc_account_cgroup_owner(fio->io_wbc, page, PAGE_SIZE); |
8648de2c CY |
551 | |
552 | inc_page_count(fio->sbi, WB_DATA_TYPE(page)); | |
553 | ||
554 | *fio->last_block = fio->new_blkaddr; | |
555 | *fio->bio = bio; | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
560 | static void f2fs_submit_ipu_bio(struct f2fs_sb_info *sbi, struct bio **bio, | |
561 | struct page *page) | |
562 | { | |
563 | if (!bio) | |
564 | return; | |
565 | ||
566 | if (!__has_merged_page(*bio, NULL, page, 0)) | |
567 | return; | |
568 | ||
569 | __submit_bio(sbi, *bio, DATA); | |
570 | *bio = NULL; | |
571 | } | |
572 | ||
fe16efe6 | 573 | void f2fs_submit_page_write(struct f2fs_io_info *fio) |
93dfe2ac | 574 | { |
05ca3632 | 575 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 576 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
a912b54d | 577 | struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp; |
4375a336 | 578 | struct page *bio_page; |
93dfe2ac | 579 | |
b9109b0e | 580 | f2fs_bug_on(sbi, is_read_io(fio->op)); |
93dfe2ac | 581 | |
fb830fc5 CY |
582 | down_write(&io->io_rwsem); |
583 | next: | |
584 | if (fio->in_list) { | |
585 | spin_lock(&io->io_lock); | |
586 | if (list_empty(&io->io_list)) { | |
587 | spin_unlock(&io->io_lock); | |
fe16efe6 | 588 | goto out; |
fb830fc5 CY |
589 | } |
590 | fio = list_first_entry(&io->io_list, | |
591 | struct f2fs_io_info, list); | |
592 | list_del(&fio->list); | |
593 | spin_unlock(&io->io_lock); | |
594 | } | |
93dfe2ac | 595 | |
93770ab7 | 596 | verify_fio_blkaddr(fio); |
93dfe2ac | 597 | |
36951b38 CY |
598 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
599 | ||
ebf7c522 TM |
600 | /* set submitted = true as a return value */ |
601 | fio->submitted = true; | |
d68f735b | 602 | |
b9109b0e | 603 | inc_page_count(sbi, WB_DATA_TYPE(bio_page)); |
93dfe2ac | 604 | |
8896cbdf CY |
605 | if (io->bio && !io_is_mergeable(sbi, io->bio, io, fio, |
606 | io->last_block_in_bio, fio->new_blkaddr)) | |
458e6197 | 607 | __submit_merged_bio(io); |
93dfe2ac JK |
608 | alloc_new: |
609 | if (io->bio == NULL) { | |
0a595eba JK |
610 | if ((fio->type == DATA || fio->type == NODE) && |
611 | fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) { | |
b9109b0e | 612 | dec_page_count(sbi, WB_DATA_TYPE(bio_page)); |
fe16efe6 CY |
613 | fio->retry = true; |
614 | goto skip; | |
0a595eba | 615 | } |
b757f6ed | 616 | io->bio = __bio_alloc(fio, BIO_MAX_PAGES); |
458e6197 | 617 | io->fio = *fio; |
93dfe2ac JK |
618 | } |
619 | ||
a912b54d | 620 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) { |
458e6197 | 621 | __submit_merged_bio(io); |
93dfe2ac JK |
622 | goto alloc_new; |
623 | } | |
624 | ||
578c6478 | 625 | if (fio->io_wbc) |
34e51a5e | 626 | wbc_account_cgroup_owner(fio->io_wbc, bio_page, PAGE_SIZE); |
578c6478 | 627 | |
7a9d7548 | 628 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 629 | f2fs_trace_ios(fio, 0); |
fb830fc5 CY |
630 | |
631 | trace_f2fs_submit_page_write(fio->page, fio); | |
fe16efe6 | 632 | skip: |
fb830fc5 CY |
633 | if (fio->in_list) |
634 | goto next; | |
fe16efe6 | 635 | out: |
4354994f | 636 | if (is_sbi_flag_set(sbi, SBI_IS_SHUTDOWN) || |
00e09c0b | 637 | !f2fs_is_checkpoint_ready(sbi)) |
5ce80586 | 638 | __submit_merged_bio(io); |
df0f8dc0 | 639 | up_write(&io->io_rwsem); |
93dfe2ac JK |
640 | } |
641 | ||
13ba41e3 | 642 | static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr, |
e2e59414 | 643 | unsigned nr_pages, unsigned op_flag) |
13ba41e3 JK |
644 | { |
645 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
13ba41e3 | 646 | struct bio *bio; |
6dbb1796 EB |
647 | struct bio_post_read_ctx *ctx; |
648 | unsigned int post_read_steps = 0; | |
13ba41e3 | 649 | |
d62fe971 | 650 | bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false); |
6dbb1796 | 651 | if (!bio) |
13ba41e3 | 652 | return ERR_PTR(-ENOMEM); |
13ba41e3 JK |
653 | f2fs_target_device(sbi, blkaddr, bio); |
654 | bio->bi_end_io = f2fs_read_end_io; | |
e2e59414 | 655 | bio_set_op_attrs(bio, REQ_OP_READ, op_flag); |
13ba41e3 | 656 | |
6dbb1796 EB |
657 | if (f2fs_encrypted_file(inode)) |
658 | post_read_steps |= 1 << STEP_DECRYPT; | |
659 | if (post_read_steps) { | |
660 | ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS); | |
661 | if (!ctx) { | |
662 | bio_put(bio); | |
663 | return ERR_PTR(-ENOMEM); | |
664 | } | |
665 | ctx->bio = bio; | |
666 | ctx->enabled_steps = post_read_steps; | |
667 | bio->bi_private = ctx; | |
6dbb1796 EB |
668 | } |
669 | ||
13ba41e3 JK |
670 | return bio; |
671 | } | |
672 | ||
673 | /* This can handle encryption stuffs */ | |
674 | static int f2fs_submit_page_read(struct inode *inode, struct page *page, | |
675 | block_t blkaddr) | |
676 | { | |
93770ab7 CY |
677 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
678 | struct bio *bio; | |
13ba41e3 | 679 | |
93770ab7 | 680 | bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0); |
13ba41e3 JK |
681 | if (IS_ERR(bio)) |
682 | return PTR_ERR(bio); | |
683 | ||
0ded69f6 JK |
684 | /* wait for GCed page writeback via META_MAPPING */ |
685 | f2fs_wait_on_block_writeback(inode, blkaddr); | |
686 | ||
13ba41e3 JK |
687 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
688 | bio_put(bio); | |
689 | return -EFAULT; | |
690 | } | |
fb7d70db | 691 | ClearPageError(page); |
93770ab7 CY |
692 | inc_page_count(sbi, F2FS_RD_DATA); |
693 | __submit_bio(sbi, bio, DATA); | |
13ba41e3 JK |
694 | return 0; |
695 | } | |
696 | ||
46008c6d CY |
697 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
698 | { | |
699 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
700 | __le32 *addr_array; | |
7a2af766 CY |
701 | int base = 0; |
702 | ||
703 | if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode)) | |
704 | base = get_extra_isize(dn->inode); | |
46008c6d CY |
705 | |
706 | /* Get physical address of data block */ | |
707 | addr_array = blkaddr_in_node(rn); | |
7a2af766 | 708 | addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
46008c6d CY |
709 | } |
710 | ||
0a8165d7 | 711 | /* |
eb47b800 JK |
712 | * Lock ordering for the change of data block address: |
713 | * ->data_page | |
714 | * ->node_page | |
715 | * update block addresses in the node page | |
716 | */ | |
4d57b86d | 717 | void f2fs_set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 718 | { |
bae0ee7a | 719 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true); |
46008c6d CY |
720 | __set_data_blkaddr(dn); |
721 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 722 | dn->node_changed = true; |
eb47b800 JK |
723 | } |
724 | ||
f28b3434 CY |
725 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
726 | { | |
727 | dn->data_blkaddr = blkaddr; | |
4d57b86d | 728 | f2fs_set_data_blkaddr(dn); |
f28b3434 CY |
729 | f2fs_update_extent_cache(dn); |
730 | } | |
731 | ||
46008c6d | 732 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
4d57b86d | 733 | int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) |
eb47b800 | 734 | { |
4081363f | 735 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
0abd675e | 736 | int err; |
eb47b800 | 737 | |
46008c6d CY |
738 | if (!count) |
739 | return 0; | |
740 | ||
91942321 | 741 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 742 | return -EPERM; |
0abd675e CY |
743 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
744 | return err; | |
eb47b800 | 745 | |
46008c6d CY |
746 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
747 | dn->ofs_in_node, count); | |
748 | ||
bae0ee7a | 749 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true, true); |
46008c6d CY |
750 | |
751 | for (; count > 0; dn->ofs_in_node++) { | |
7a2af766 CY |
752 | block_t blkaddr = datablock_addr(dn->inode, |
753 | dn->node_page, dn->ofs_in_node); | |
46008c6d CY |
754 | if (blkaddr == NULL_ADDR) { |
755 | dn->data_blkaddr = NEW_ADDR; | |
756 | __set_data_blkaddr(dn); | |
757 | count--; | |
758 | } | |
759 | } | |
760 | ||
761 | if (set_page_dirty(dn->node_page)) | |
762 | dn->node_changed = true; | |
eb47b800 JK |
763 | return 0; |
764 | } | |
765 | ||
46008c6d | 766 | /* Should keep dn->ofs_in_node unchanged */ |
4d57b86d | 767 | int f2fs_reserve_new_block(struct dnode_of_data *dn) |
46008c6d CY |
768 | { |
769 | unsigned int ofs_in_node = dn->ofs_in_node; | |
770 | int ret; | |
771 | ||
4d57b86d | 772 | ret = f2fs_reserve_new_blocks(dn, 1); |
46008c6d CY |
773 | dn->ofs_in_node = ofs_in_node; |
774 | return ret; | |
775 | } | |
776 | ||
b600965c HL |
777 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
778 | { | |
779 | bool need_put = dn->inode_page ? false : true; | |
780 | int err; | |
781 | ||
4d57b86d | 782 | err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE); |
b600965c HL |
783 | if (err) |
784 | return err; | |
a8865372 | 785 | |
b600965c | 786 | if (dn->data_blkaddr == NULL_ADDR) |
4d57b86d | 787 | err = f2fs_reserve_new_block(dn); |
a8865372 | 788 | if (err || need_put) |
b600965c HL |
789 | f2fs_put_dnode(dn); |
790 | return err; | |
791 | } | |
792 | ||
759af1c9 | 793 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 794 | { |
e15882b6 | 795 | struct extent_info ei = {0,0,0}; |
759af1c9 | 796 | struct inode *inode = dn->inode; |
028a41e8 | 797 | |
759af1c9 FL |
798 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
799 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
800 | return 0; | |
429511cd | 801 | } |
028a41e8 | 802 | |
759af1c9 | 803 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
804 | } |
805 | ||
4d57b86d | 806 | struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 807 | int op_flags, bool for_write) |
eb47b800 | 808 | { |
eb47b800 JK |
809 | struct address_space *mapping = inode->i_mapping; |
810 | struct dnode_of_data dn; | |
811 | struct page *page; | |
e15882b6 | 812 | struct extent_info ei = {0,0,0}; |
eb47b800 | 813 | int err; |
4375a336 | 814 | |
a56c7c6f | 815 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
816 | if (!page) |
817 | return ERR_PTR(-ENOMEM); | |
818 | ||
cb3bc9ee CY |
819 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
820 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
93770ab7 CY |
821 | if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr, |
822 | DATA_GENERIC_ENHANCE_READ)) { | |
10f966bb | 823 | err = -EFSCORRUPTED; |
93770ab7 CY |
824 | goto put_err; |
825 | } | |
cb3bc9ee CY |
826 | goto got_it; |
827 | } | |
828 | ||
eb47b800 | 829 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
4d57b86d | 830 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
831 | if (err) |
832 | goto put_err; | |
eb47b800 JK |
833 | f2fs_put_dnode(&dn); |
834 | ||
6bacf52f | 835 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
836 | err = -ENOENT; |
837 | goto put_err; | |
650495de | 838 | } |
93770ab7 CY |
839 | if (dn.data_blkaddr != NEW_ADDR && |
840 | !f2fs_is_valid_blkaddr(F2FS_I_SB(inode), | |
841 | dn.data_blkaddr, | |
842 | DATA_GENERIC_ENHANCE)) { | |
10f966bb | 843 | err = -EFSCORRUPTED; |
93770ab7 CY |
844 | goto put_err; |
845 | } | |
cb3bc9ee | 846 | got_it: |
43f3eae1 JK |
847 | if (PageUptodate(page)) { |
848 | unlock_page(page); | |
eb47b800 | 849 | return page; |
43f3eae1 | 850 | } |
eb47b800 | 851 | |
d59ff4df JK |
852 | /* |
853 | * A new dentry page is allocated but not able to be written, since its | |
854 | * new inode page couldn't be allocated due to -ENOSPC. | |
855 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
4d57b86d CY |
856 | * see, f2fs_add_link -> f2fs_get_new_data_page -> |
857 | * f2fs_init_inode_metadata. | |
d59ff4df JK |
858 | */ |
859 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 860 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
861 | if (!PageUptodate(page)) |
862 | SetPageUptodate(page); | |
43f3eae1 | 863 | unlock_page(page); |
d59ff4df JK |
864 | return page; |
865 | } | |
eb47b800 | 866 | |
13ba41e3 | 867 | err = f2fs_submit_page_read(inode, page, dn.data_blkaddr); |
393ff91f | 868 | if (err) |
86531d6b | 869 | goto put_err; |
43f3eae1 | 870 | return page; |
86531d6b JK |
871 | |
872 | put_err: | |
873 | f2fs_put_page(page, 1); | |
874 | return ERR_PTR(err); | |
43f3eae1 JK |
875 | } |
876 | ||
4d57b86d | 877 | struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index) |
43f3eae1 JK |
878 | { |
879 | struct address_space *mapping = inode->i_mapping; | |
880 | struct page *page; | |
881 | ||
882 | page = find_get_page(mapping, index); | |
883 | if (page && PageUptodate(page)) | |
884 | return page; | |
885 | f2fs_put_page(page, 0); | |
886 | ||
4d57b86d | 887 | page = f2fs_get_read_data_page(inode, index, 0, false); |
43f3eae1 JK |
888 | if (IS_ERR(page)) |
889 | return page; | |
890 | ||
891 | if (PageUptodate(page)) | |
892 | return page; | |
893 | ||
894 | wait_on_page_locked(page); | |
895 | if (unlikely(!PageUptodate(page))) { | |
896 | f2fs_put_page(page, 0); | |
897 | return ERR_PTR(-EIO); | |
898 | } | |
899 | return page; | |
900 | } | |
901 | ||
902 | /* | |
903 | * If it tries to access a hole, return an error. | |
904 | * Because, the callers, functions in dir.c and GC, should be able to know | |
905 | * whether this page exists or not. | |
906 | */ | |
4d57b86d | 907 | struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index, |
a56c7c6f | 908 | bool for_write) |
43f3eae1 JK |
909 | { |
910 | struct address_space *mapping = inode->i_mapping; | |
911 | struct page *page; | |
912 | repeat: | |
4d57b86d | 913 | page = f2fs_get_read_data_page(inode, index, 0, for_write); |
43f3eae1 JK |
914 | if (IS_ERR(page)) |
915 | return page; | |
393ff91f | 916 | |
43f3eae1 | 917 | /* wait for read completion */ |
393ff91f | 918 | lock_page(page); |
6bacf52f | 919 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
920 | f2fs_put_page(page, 1); |
921 | goto repeat; | |
eb47b800 | 922 | } |
1563ac75 CY |
923 | if (unlikely(!PageUptodate(page))) { |
924 | f2fs_put_page(page, 1); | |
925 | return ERR_PTR(-EIO); | |
926 | } | |
eb47b800 JK |
927 | return page; |
928 | } | |
929 | ||
0a8165d7 | 930 | /* |
eb47b800 JK |
931 | * Caller ensures that this data page is never allocated. |
932 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 933 | * |
4f4124d0 CY |
934 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
935 | * f2fs_unlock_op(). | |
470f00e9 CY |
936 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
937 | * ipage should be released by this function. | |
eb47b800 | 938 | */ |
4d57b86d | 939 | struct page *f2fs_get_new_data_page(struct inode *inode, |
a8865372 | 940 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 941 | { |
eb47b800 JK |
942 | struct address_space *mapping = inode->i_mapping; |
943 | struct page *page; | |
944 | struct dnode_of_data dn; | |
945 | int err; | |
7612118a | 946 | |
a56c7c6f | 947 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
948 | if (!page) { |
949 | /* | |
950 | * before exiting, we should make sure ipage will be released | |
951 | * if any error occur. | |
952 | */ | |
953 | f2fs_put_page(ipage, 1); | |
01f28610 | 954 | return ERR_PTR(-ENOMEM); |
470f00e9 | 955 | } |
eb47b800 | 956 | |
a8865372 | 957 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 958 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
959 | if (err) { |
960 | f2fs_put_page(page, 1); | |
eb47b800 | 961 | return ERR_PTR(err); |
a8865372 | 962 | } |
01f28610 JK |
963 | if (!ipage) |
964 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
965 | |
966 | if (PageUptodate(page)) | |
01f28610 | 967 | goto got_it; |
eb47b800 JK |
968 | |
969 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 970 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
971 | if (!PageUptodate(page)) |
972 | SetPageUptodate(page); | |
eb47b800 | 973 | } else { |
4375a336 | 974 | f2fs_put_page(page, 1); |
a8865372 | 975 | |
7612118a JK |
976 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
977 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
4d57b86d | 978 | page = f2fs_get_lock_data_page(inode, index, true); |
4375a336 | 979 | if (IS_ERR(page)) |
7612118a | 980 | return page; |
eb47b800 | 981 | } |
01f28610 | 982 | got_it: |
9edcdabf | 983 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 984 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 985 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
986 | return page; |
987 | } | |
988 | ||
d5097be5 | 989 | static int __allocate_data_block(struct dnode_of_data *dn, int seg_type) |
bfad7c2d | 990 | { |
4081363f | 991 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 992 | struct f2fs_summary sum; |
bfad7c2d | 993 | struct node_info ni; |
6aa58d8a | 994 | block_t old_blkaddr; |
46008c6d | 995 | blkcnt_t count = 1; |
0abd675e | 996 | int err; |
bfad7c2d | 997 | |
91942321 | 998 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 999 | return -EPERM; |
df6136ef | 1000 | |
7735730d CY |
1001 | err = f2fs_get_node_info(sbi, dn->nid, &ni); |
1002 | if (err) | |
1003 | return err; | |
1004 | ||
7a2af766 CY |
1005 | dn->data_blkaddr = datablock_addr(dn->inode, |
1006 | dn->node_page, dn->ofs_in_node); | |
f847c699 | 1007 | if (dn->data_blkaddr != NULL_ADDR) |
df6136ef CY |
1008 | goto alloc; |
1009 | ||
0abd675e CY |
1010 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
1011 | return err; | |
bfad7c2d | 1012 | |
df6136ef | 1013 | alloc: |
bfad7c2d | 1014 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); |
6aa58d8a CY |
1015 | old_blkaddr = dn->data_blkaddr; |
1016 | f2fs_allocate_data_block(sbi, NULL, old_blkaddr, &dn->data_blkaddr, | |
d5097be5 | 1017 | &sum, seg_type, NULL, false); |
6aa58d8a CY |
1018 | if (GET_SEGNO(sbi, old_blkaddr) != NULL_SEGNO) |
1019 | invalidate_mapping_pages(META_MAPPING(sbi), | |
1020 | old_blkaddr, old_blkaddr); | |
4d57b86d | 1021 | f2fs_set_data_blkaddr(dn); |
bfad7c2d | 1022 | |
0a4daae5 JK |
1023 | /* |
1024 | * i_size will be updated by direct_IO. Otherwise, we'll get stale | |
1025 | * data from unwritten block via dio_read. | |
1026 | */ | |
bfad7c2d JK |
1027 | return 0; |
1028 | } | |
1029 | ||
a7de6086 | 1030 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 1031 | { |
b439b103 | 1032 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 1033 | struct f2fs_map_blocks map; |
d6d478a1 | 1034 | int flag; |
a7de6086 | 1035 | int err = 0; |
d6d478a1 | 1036 | bool direct_io = iocb->ki_flags & IOCB_DIRECT; |
59b802e5 | 1037 | |
71ad682c | 1038 | /* convert inline data for Direct I/O*/ |
d6d478a1 | 1039 | if (direct_io) { |
71ad682c WG |
1040 | err = f2fs_convert_inline_inode(inode); |
1041 | if (err) | |
1042 | return err; | |
1043 | } | |
1044 | ||
f9d6d059 CY |
1045 | if (direct_io && allow_outplace_dio(inode, iocb, from)) |
1046 | return 0; | |
1047 | ||
dc91de78 JK |
1048 | if (is_inode_flag_set(inode, FI_NO_PREALLOC)) |
1049 | return 0; | |
1050 | ||
0080c507 | 1051 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
1052 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
1053 | if (map.m_len > map.m_lblk) | |
1054 | map.m_len -= map.m_lblk; | |
1055 | else | |
1056 | map.m_len = 0; | |
1057 | ||
da85985c | 1058 | map.m_next_pgofs = NULL; |
c4020b2d | 1059 | map.m_next_extent = NULL; |
d5097be5 | 1060 | map.m_seg_type = NO_CHECK_TYPE; |
f9d6d059 | 1061 | map.m_may_create = true; |
2a340760 | 1062 | |
d6d478a1 | 1063 | if (direct_io) { |
4d57b86d | 1064 | map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint); |
f847c699 | 1065 | flag = f2fs_force_buffered_io(inode, iocb, from) ? |
d6d478a1 CY |
1066 | F2FS_GET_BLOCK_PRE_AIO : |
1067 | F2FS_GET_BLOCK_PRE_DIO; | |
1068 | goto map_blocks; | |
d5097be5 | 1069 | } |
f2470371 | 1070 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) { |
a7de6086 JK |
1071 | err = f2fs_convert_inline_inode(inode); |
1072 | if (err) | |
1073 | return err; | |
b439b103 | 1074 | } |
d6d478a1 | 1075 | if (f2fs_has_inline_data(inode)) |
25006645 | 1076 | return err; |
d6d478a1 CY |
1077 | |
1078 | flag = F2FS_GET_BLOCK_PRE_AIO; | |
1079 | ||
1080 | map_blocks: | |
1081 | err = f2fs_map_blocks(inode, &map, 1, flag); | |
1082 | if (map.m_len > 0 && err == -ENOSPC) { | |
1083 | if (!direct_io) | |
1084 | set_inode_flag(inode, FI_NO_PREALLOC); | |
1085 | err = 0; | |
25006645 | 1086 | } |
a7de6086 | 1087 | return err; |
59b802e5 JK |
1088 | } |
1089 | ||
39a86958 | 1090 | void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock) |
59c9081b YH |
1091 | { |
1092 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { | |
1093 | if (lock) | |
1094 | down_read(&sbi->node_change); | |
1095 | else | |
1096 | up_read(&sbi->node_change); | |
1097 | } else { | |
1098 | if (lock) | |
1099 | f2fs_lock_op(sbi); | |
1100 | else | |
1101 | f2fs_unlock_op(sbi); | |
1102 | } | |
1103 | } | |
1104 | ||
0a8165d7 | 1105 | /* |
003a3e1d JK |
1106 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
1107 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
1108 | * If original data blocks are allocated, then give them to blockdev. |
1109 | * Otherwise, | |
1110 | * a. preallocate requested block addresses | |
1111 | * b. do not use extent cache for better performance | |
1112 | * c. give the block addresses to blockdev | |
eb47b800 | 1113 | */ |
d323d005 | 1114 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 1115 | int create, int flag) |
eb47b800 | 1116 | { |
003a3e1d | 1117 | unsigned int maxblocks = map->m_len; |
eb47b800 | 1118 | struct dnode_of_data dn; |
f9811703 | 1119 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
f9d6d059 | 1120 | int mode = map->m_may_create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 1121 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 1122 | int err = 0, ofs = 1; |
46008c6d CY |
1123 | unsigned int ofs_in_node, last_ofs_in_node; |
1124 | blkcnt_t prealloc; | |
e15882b6 | 1125 | struct extent_info ei = {0,0,0}; |
7df3a431 | 1126 | block_t blkaddr; |
c4020b2d | 1127 | unsigned int start_pgofs; |
eb47b800 | 1128 | |
dfd02e4d CY |
1129 | if (!maxblocks) |
1130 | return 0; | |
1131 | ||
003a3e1d JK |
1132 | map->m_len = 0; |
1133 | map->m_flags = 0; | |
1134 | ||
1135 | /* it only supports block size == page size */ | |
1136 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 1137 | end = pgofs + maxblocks; |
eb47b800 | 1138 | |
24b84912 | 1139 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
f4f0b677 JZ |
1140 | if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO && |
1141 | map->m_may_create) | |
1142 | goto next_dnode; | |
1143 | ||
003a3e1d JK |
1144 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
1145 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
1146 | map->m_flags = F2FS_MAP_MAPPED; | |
c4020b2d CY |
1147 | if (map->m_next_extent) |
1148 | *map->m_next_extent = pgofs + map->m_len; | |
1e78e8bd ST |
1149 | |
1150 | /* for hardware encryption, but to avoid potential issue in future */ | |
1151 | if (flag == F2FS_GET_BLOCK_DIO) | |
1152 | f2fs_wait_on_block_writeback_range(inode, | |
1153 | map->m_pblk, map->m_len); | |
bfad7c2d | 1154 | goto out; |
a2e7d1bf | 1155 | } |
bfad7c2d | 1156 | |
4fe71e88 | 1157 | next_dnode: |
f9d6d059 | 1158 | if (map->m_may_create) |
59c9081b | 1159 | __do_map_lock(sbi, flag, true); |
eb47b800 JK |
1160 | |
1161 | /* When reading holes, we need its node page */ | |
1162 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
4d57b86d | 1163 | err = f2fs_get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 1164 | if (err) { |
43473f96 CY |
1165 | if (flag == F2FS_GET_BLOCK_BMAP) |
1166 | map->m_pblk = 0; | |
da85985c | 1167 | if (err == -ENOENT) { |
bfad7c2d | 1168 | err = 0; |
da85985c CY |
1169 | if (map->m_next_pgofs) |
1170 | *map->m_next_pgofs = | |
4d57b86d | 1171 | f2fs_get_next_page_offset(&dn, pgofs); |
c4020b2d CY |
1172 | if (map->m_next_extent) |
1173 | *map->m_next_extent = | |
4d57b86d | 1174 | f2fs_get_next_page_offset(&dn, pgofs); |
da85985c | 1175 | } |
bfad7c2d | 1176 | goto unlock_out; |
848753aa | 1177 | } |
973163fc | 1178 | |
c4020b2d | 1179 | start_pgofs = pgofs; |
46008c6d | 1180 | prealloc = 0; |
230436b3 | 1181 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 1182 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
1183 | |
1184 | next_block: | |
7a2af766 | 1185 | blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node); |
4fe71e88 | 1186 | |
c9b60788 | 1187 | if (__is_valid_data_blkaddr(blkaddr) && |
93770ab7 | 1188 | !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) { |
10f966bb | 1189 | err = -EFSCORRUPTED; |
c9b60788 CY |
1190 | goto sync_out; |
1191 | } | |
1192 | ||
93770ab7 | 1193 | if (__is_valid_data_blkaddr(blkaddr)) { |
f847c699 | 1194 | /* use out-place-update for driect IO under LFS mode */ |
f9d6d059 CY |
1195 | if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO && |
1196 | map->m_may_create) { | |
f847c699 | 1197 | err = __allocate_data_block(&dn, map->m_seg_type); |
73c0a927 JZ |
1198 | if (!err) { |
1199 | blkaddr = dn.data_blkaddr; | |
f847c699 | 1200 | set_inode_flag(inode, FI_APPEND_WRITE); |
73c0a927 | 1201 | } |
f847c699 CY |
1202 | } |
1203 | } else { | |
973163fc | 1204 | if (create) { |
f9811703 CY |
1205 | if (unlikely(f2fs_cp_error(sbi))) { |
1206 | err = -EIO; | |
4fe71e88 | 1207 | goto sync_out; |
f9811703 | 1208 | } |
24b84912 | 1209 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
1210 | if (blkaddr == NULL_ADDR) { |
1211 | prealloc++; | |
1212 | last_ofs_in_node = dn.ofs_in_node; | |
1213 | } | |
24b84912 | 1214 | } else { |
0a4daae5 JK |
1215 | WARN_ON(flag != F2FS_GET_BLOCK_PRE_DIO && |
1216 | flag != F2FS_GET_BLOCK_DIO); | |
d5097be5 HL |
1217 | err = __allocate_data_block(&dn, |
1218 | map->m_seg_type); | |
6f2d8ed6 | 1219 | if (!err) |
91942321 | 1220 | set_inode_flag(inode, FI_APPEND_WRITE); |
24b84912 | 1221 | } |
973163fc | 1222 | if (err) |
4fe71e88 | 1223 | goto sync_out; |
3f2be043 | 1224 | map->m_flags |= F2FS_MAP_NEW; |
4fe71e88 | 1225 | blkaddr = dn.data_blkaddr; |
973163fc | 1226 | } else { |
43473f96 CY |
1227 | if (flag == F2FS_GET_BLOCK_BMAP) { |
1228 | map->m_pblk = 0; | |
1229 | goto sync_out; | |
1230 | } | |
c4020b2d CY |
1231 | if (flag == F2FS_GET_BLOCK_PRECACHE) |
1232 | goto sync_out; | |
da85985c CY |
1233 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
1234 | blkaddr == NULL_ADDR) { | |
1235 | if (map->m_next_pgofs) | |
1236 | *map->m_next_pgofs = pgofs + 1; | |
4c2ac6a8 | 1237 | goto sync_out; |
da85985c | 1238 | } |
f3d98e74 CY |
1239 | if (flag != F2FS_GET_BLOCK_FIEMAP) { |
1240 | /* for defragment case */ | |
1241 | if (map->m_next_pgofs) | |
1242 | *map->m_next_pgofs = pgofs + 1; | |
4fe71e88 | 1243 | goto sync_out; |
f3d98e74 | 1244 | } |
e2b4e2bc | 1245 | } |
e2b4e2bc | 1246 | } |
eb47b800 | 1247 | |
46008c6d CY |
1248 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
1249 | goto skip; | |
1250 | ||
4fe71e88 CY |
1251 | if (map->m_len == 0) { |
1252 | /* preallocated unwritten block should be mapped for fiemap. */ | |
1253 | if (blkaddr == NEW_ADDR) | |
1254 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
1255 | map->m_flags |= F2FS_MAP_MAPPED; | |
1256 | ||
1257 | map->m_pblk = blkaddr; | |
1258 | map->m_len = 1; | |
1259 | } else if ((map->m_pblk != NEW_ADDR && | |
1260 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 1261 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 1262 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
1263 | ofs++; |
1264 | map->m_len++; | |
1265 | } else { | |
1266 | goto sync_out; | |
1267 | } | |
bfad7c2d | 1268 | |
46008c6d | 1269 | skip: |
bfad7c2d JK |
1270 | dn.ofs_in_node++; |
1271 | pgofs++; | |
1272 | ||
46008c6d CY |
1273 | /* preallocate blocks in batch for one dnode page */ |
1274 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
1275 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 1276 | |
46008c6d | 1277 | dn.ofs_in_node = ofs_in_node; |
4d57b86d | 1278 | err = f2fs_reserve_new_blocks(&dn, prealloc); |
46008c6d CY |
1279 | if (err) |
1280 | goto sync_out; | |
bfad7c2d | 1281 | |
46008c6d CY |
1282 | map->m_len += dn.ofs_in_node - ofs_in_node; |
1283 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
1284 | err = -ENOSPC; | |
1285 | goto sync_out; | |
3104af35 | 1286 | } |
46008c6d CY |
1287 | dn.ofs_in_node = end_offset; |
1288 | } | |
1289 | ||
1290 | if (pgofs >= end) | |
1291 | goto sync_out; | |
1292 | else if (dn.ofs_in_node < end_offset) | |
1293 | goto next_block; | |
1294 | ||
c4020b2d CY |
1295 | if (flag == F2FS_GET_BLOCK_PRECACHE) { |
1296 | if (map->m_flags & F2FS_MAP_MAPPED) { | |
1297 | unsigned int ofs = start_pgofs - map->m_lblk; | |
1298 | ||
1299 | f2fs_update_extent_cache_range(&dn, | |
1300 | start_pgofs, map->m_pblk + ofs, | |
1301 | map->m_len - ofs); | |
1302 | } | |
1303 | } | |
1304 | ||
46008c6d CY |
1305 | f2fs_put_dnode(&dn); |
1306 | ||
f9d6d059 | 1307 | if (map->m_may_create) { |
59c9081b | 1308 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 1309 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 1310 | } |
46008c6d | 1311 | goto next_dnode; |
7df3a431 | 1312 | |
bfad7c2d | 1313 | sync_out: |
1e78e8bd ST |
1314 | |
1315 | /* for hardware encryption, but to avoid potential issue in future */ | |
1316 | if (flag == F2FS_GET_BLOCK_DIO && map->m_flags & F2FS_MAP_MAPPED) | |
1317 | f2fs_wait_on_block_writeback_range(inode, | |
1318 | map->m_pblk, map->m_len); | |
1319 | ||
c4020b2d CY |
1320 | if (flag == F2FS_GET_BLOCK_PRECACHE) { |
1321 | if (map->m_flags & F2FS_MAP_MAPPED) { | |
1322 | unsigned int ofs = start_pgofs - map->m_lblk; | |
1323 | ||
1324 | f2fs_update_extent_cache_range(&dn, | |
1325 | start_pgofs, map->m_pblk + ofs, | |
1326 | map->m_len - ofs); | |
1327 | } | |
1328 | if (map->m_next_extent) | |
1329 | *map->m_next_extent = pgofs + 1; | |
1330 | } | |
eb47b800 | 1331 | f2fs_put_dnode(&dn); |
bfad7c2d | 1332 | unlock_out: |
f9d6d059 | 1333 | if (map->m_may_create) { |
59c9081b | 1334 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 1335 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 1336 | } |
bfad7c2d | 1337 | out: |
003a3e1d | 1338 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 1339 | return err; |
eb47b800 JK |
1340 | } |
1341 | ||
b91050a8 HL |
1342 | bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len) |
1343 | { | |
1344 | struct f2fs_map_blocks map; | |
1345 | block_t last_lblk; | |
1346 | int err; | |
1347 | ||
1348 | if (pos + len > i_size_read(inode)) | |
1349 | return false; | |
1350 | ||
1351 | map.m_lblk = F2FS_BYTES_TO_BLK(pos); | |
1352 | map.m_next_pgofs = NULL; | |
1353 | map.m_next_extent = NULL; | |
1354 | map.m_seg_type = NO_CHECK_TYPE; | |
f4f0b677 | 1355 | map.m_may_create = false; |
b91050a8 HL |
1356 | last_lblk = F2FS_BLK_ALIGN(pos + len); |
1357 | ||
1358 | while (map.m_lblk < last_lblk) { | |
1359 | map.m_len = last_lblk - map.m_lblk; | |
1360 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT); | |
1361 | if (err || map.m_len == 0) | |
1362 | return false; | |
1363 | map.m_lblk += map.m_len; | |
1364 | } | |
1365 | return true; | |
1366 | } | |
1367 | ||
003a3e1d | 1368 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c | 1369 | struct buffer_head *bh, int create, int flag, |
f9d6d059 | 1370 | pgoff_t *next_pgofs, int seg_type, bool may_write) |
003a3e1d JK |
1371 | { |
1372 | struct f2fs_map_blocks map; | |
a7de6086 | 1373 | int err; |
003a3e1d JK |
1374 | |
1375 | map.m_lblk = iblock; | |
1376 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 1377 | map.m_next_pgofs = next_pgofs; |
c4020b2d | 1378 | map.m_next_extent = NULL; |
d5097be5 | 1379 | map.m_seg_type = seg_type; |
f9d6d059 | 1380 | map.m_may_create = may_write; |
003a3e1d | 1381 | |
a7de6086 JK |
1382 | err = f2fs_map_blocks(inode, &map, create, flag); |
1383 | if (!err) { | |
003a3e1d JK |
1384 | map_bh(bh, inode->i_sb, map.m_pblk); |
1385 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
b86e3307 | 1386 | bh->b_size = (u64)map.m_len << inode->i_blkbits; |
003a3e1d | 1387 | } |
a7de6086 | 1388 | return err; |
003a3e1d JK |
1389 | } |
1390 | ||
ccfb3000 | 1391 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
1392 | struct buffer_head *bh_result, int create, int flag, |
1393 | pgoff_t *next_pgofs) | |
e2b4e2bc | 1394 | { |
da85985c | 1395 | return __get_data_block(inode, iblock, bh_result, create, |
d5097be5 | 1396 | flag, next_pgofs, |
f9d6d059 CY |
1397 | NO_CHECK_TYPE, create); |
1398 | } | |
1399 | ||
1400 | static int get_data_block_dio_write(struct inode *inode, sector_t iblock, | |
1401 | struct buffer_head *bh_result, int create) | |
1402 | { | |
1403 | return __get_data_block(inode, iblock, bh_result, create, | |
1404 | F2FS_GET_BLOCK_DIO, NULL, | |
1405 | f2fs_rw_hint_to_seg_type(inode->i_write_hint), | |
75a037f3 | 1406 | IS_SWAPFILE(inode) ? false : true); |
e2b4e2bc CY |
1407 | } |
1408 | ||
1409 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
1410 | struct buffer_head *bh_result, int create) |
1411 | { | |
e2b4e2bc | 1412 | return __get_data_block(inode, iblock, bh_result, create, |
f9d6d059 CY |
1413 | F2FS_GET_BLOCK_DIO, NULL, |
1414 | f2fs_rw_hint_to_seg_type(inode->i_write_hint), | |
1415 | false); | |
ccfb3000 JK |
1416 | } |
1417 | ||
e2b4e2bc | 1418 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
1419 | struct buffer_head *bh_result, int create) |
1420 | { | |
179448bf | 1421 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 1422 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
1423 | return -EFBIG; |
1424 | ||
e2b4e2bc | 1425 | return __get_data_block(inode, iblock, bh_result, create, |
d5097be5 | 1426 | F2FS_GET_BLOCK_BMAP, NULL, |
f9d6d059 | 1427 | NO_CHECK_TYPE, create); |
ccfb3000 JK |
1428 | } |
1429 | ||
7f63eb77 JK |
1430 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
1431 | { | |
1432 | return (offset >> inode->i_blkbits); | |
1433 | } | |
1434 | ||
1435 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
1436 | { | |
1437 | return (blk << inode->i_blkbits); | |
1438 | } | |
1439 | ||
442a9dbd CY |
1440 | static int f2fs_xattr_fiemap(struct inode *inode, |
1441 | struct fiemap_extent_info *fieinfo) | |
1442 | { | |
1443 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1444 | struct page *page; | |
1445 | struct node_info ni; | |
1446 | __u64 phys = 0, len; | |
1447 | __u32 flags; | |
1448 | nid_t xnid = F2FS_I(inode)->i_xattr_nid; | |
1449 | int err = 0; | |
1450 | ||
1451 | if (f2fs_has_inline_xattr(inode)) { | |
1452 | int offset; | |
1453 | ||
1454 | page = f2fs_grab_cache_page(NODE_MAPPING(sbi), | |
1455 | inode->i_ino, false); | |
1456 | if (!page) | |
1457 | return -ENOMEM; | |
1458 | ||
7735730d CY |
1459 | err = f2fs_get_node_info(sbi, inode->i_ino, &ni); |
1460 | if (err) { | |
1461 | f2fs_put_page(page, 1); | |
1462 | return err; | |
1463 | } | |
442a9dbd CY |
1464 | |
1465 | phys = (__u64)blk_to_logical(inode, ni.blk_addr); | |
1466 | offset = offsetof(struct f2fs_inode, i_addr) + | |
1467 | sizeof(__le32) * (DEF_ADDRS_PER_INODE - | |
b323fd28 | 1468 | get_inline_xattr_addrs(inode)); |
442a9dbd CY |
1469 | |
1470 | phys += offset; | |
1471 | len = inline_xattr_size(inode); | |
1472 | ||
1473 | f2fs_put_page(page, 1); | |
1474 | ||
1475 | flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED; | |
1476 | ||
1477 | if (!xnid) | |
1478 | flags |= FIEMAP_EXTENT_LAST; | |
1479 | ||
1480 | err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); | |
1481 | if (err || err == 1) | |
1482 | return err; | |
1483 | } | |
1484 | ||
1485 | if (xnid) { | |
1486 | page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false); | |
1487 | if (!page) | |
1488 | return -ENOMEM; | |
1489 | ||
7735730d CY |
1490 | err = f2fs_get_node_info(sbi, xnid, &ni); |
1491 | if (err) { | |
1492 | f2fs_put_page(page, 1); | |
1493 | return err; | |
1494 | } | |
442a9dbd CY |
1495 | |
1496 | phys = (__u64)blk_to_logical(inode, ni.blk_addr); | |
1497 | len = inode->i_sb->s_blocksize; | |
1498 | ||
1499 | f2fs_put_page(page, 1); | |
1500 | ||
1501 | flags = FIEMAP_EXTENT_LAST; | |
1502 | } | |
1503 | ||
1504 | if (phys) | |
1505 | err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); | |
1506 | ||
1507 | return (err < 0 ? err : 0); | |
1508 | } | |
1509 | ||
9ab70134 JK |
1510 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1511 | u64 start, u64 len) | |
1512 | { | |
7f63eb77 JK |
1513 | struct buffer_head map_bh; |
1514 | sector_t start_blk, last_blk; | |
da85985c | 1515 | pgoff_t next_pgofs; |
7f63eb77 JK |
1516 | u64 logical = 0, phys = 0, size = 0; |
1517 | u32 flags = 0; | |
7f63eb77 JK |
1518 | int ret = 0; |
1519 | ||
c4020b2d CY |
1520 | if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) { |
1521 | ret = f2fs_precache_extents(inode); | |
1522 | if (ret) | |
1523 | return ret; | |
1524 | } | |
1525 | ||
442a9dbd | 1526 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR); |
7f63eb77 JK |
1527 | if (ret) |
1528 | return ret; | |
1529 | ||
f1b43d4c CY |
1530 | inode_lock(inode); |
1531 | ||
442a9dbd CY |
1532 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1533 | ret = f2fs_xattr_fiemap(inode, fieinfo); | |
1534 | goto out; | |
1535 | } | |
1536 | ||
7975f349 | 1537 | if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode)) { |
67f8cf3c JK |
1538 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); |
1539 | if (ret != -EAGAIN) | |
f1b43d4c | 1540 | goto out; |
67f8cf3c JK |
1541 | } |
1542 | ||
7f63eb77 JK |
1543 | if (logical_to_blk(inode, len) == 0) |
1544 | len = blk_to_logical(inode, 1); | |
1545 | ||
1546 | start_blk = logical_to_blk(inode, start); | |
1547 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 1548 | |
7f63eb77 JK |
1549 | next: |
1550 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
1551 | map_bh.b_size = len; | |
1552 | ||
e2b4e2bc | 1553 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 1554 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
1555 | if (ret) |
1556 | goto out; | |
1557 | ||
1558 | /* HOLE */ | |
1559 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 1560 | start_blk = next_pgofs; |
58736fa6 CY |
1561 | |
1562 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
1563 | F2FS_I_SB(inode)->max_file_blocks)) | |
9a950d52 | 1564 | goto prep_next; |
58736fa6 | 1565 | |
9a950d52 FL |
1566 | flags |= FIEMAP_EXTENT_LAST; |
1567 | } | |
7f63eb77 | 1568 | |
da5af127 | 1569 | if (size) { |
62230e0d | 1570 | if (IS_ENCRYPTED(inode)) |
da5af127 CY |
1571 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; |
1572 | ||
9a950d52 FL |
1573 | ret = fiemap_fill_next_extent(fieinfo, logical, |
1574 | phys, size, flags); | |
da5af127 | 1575 | } |
7f63eb77 | 1576 | |
9a950d52 FL |
1577 | if (start_blk > last_blk || ret) |
1578 | goto out; | |
7f63eb77 | 1579 | |
9a950d52 FL |
1580 | logical = blk_to_logical(inode, start_blk); |
1581 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
1582 | size = map_bh.b_size; | |
1583 | flags = 0; | |
1584 | if (buffer_unwritten(&map_bh)) | |
1585 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 1586 | |
9a950d52 | 1587 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 1588 | |
9a950d52 | 1589 | prep_next: |
7f63eb77 JK |
1590 | cond_resched(); |
1591 | if (fatal_signal_pending(current)) | |
1592 | ret = -EINTR; | |
1593 | else | |
1594 | goto next; | |
1595 | out: | |
1596 | if (ret == 1) | |
1597 | ret = 0; | |
1598 | ||
5955102c | 1599 | inode_unlock(inode); |
7f63eb77 | 1600 | return ret; |
9ab70134 JK |
1601 | } |
1602 | ||
2df0ab04 CY |
1603 | static int f2fs_read_single_page(struct inode *inode, struct page *page, |
1604 | unsigned nr_pages, | |
1605 | struct f2fs_map_blocks *map, | |
1606 | struct bio **bio_ret, | |
1607 | sector_t *last_block_in_bio, | |
1608 | bool is_readahead) | |
1609 | { | |
1610 | struct bio *bio = *bio_ret; | |
1611 | const unsigned blkbits = inode->i_blkbits; | |
1612 | const unsigned blocksize = 1 << blkbits; | |
1613 | sector_t block_in_file; | |
1614 | sector_t last_block; | |
1615 | sector_t last_block_in_file; | |
1616 | sector_t block_nr; | |
1617 | int ret = 0; | |
1618 | ||
4969c06a | 1619 | block_in_file = (sector_t)page_index(page); |
2df0ab04 CY |
1620 | last_block = block_in_file + nr_pages; |
1621 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1622 | blkbits; | |
1623 | if (last_block > last_block_in_file) | |
1624 | last_block = last_block_in_file; | |
1625 | ||
1626 | /* just zeroing out page which is beyond EOF */ | |
1627 | if (block_in_file >= last_block) | |
1628 | goto zero_out; | |
1629 | /* | |
1630 | * Map blocks using the previous result first. | |
1631 | */ | |
1632 | if ((map->m_flags & F2FS_MAP_MAPPED) && | |
1633 | block_in_file > map->m_lblk && | |
1634 | block_in_file < (map->m_lblk + map->m_len)) | |
1635 | goto got_it; | |
1636 | ||
1637 | /* | |
1638 | * Then do more f2fs_map_blocks() calls until we are | |
1639 | * done with this page. | |
1640 | */ | |
1641 | map->m_lblk = block_in_file; | |
1642 | map->m_len = last_block - block_in_file; | |
1643 | ||
1644 | ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT); | |
1645 | if (ret) | |
1646 | goto out; | |
1647 | got_it: | |
1648 | if ((map->m_flags & F2FS_MAP_MAPPED)) { | |
1649 | block_nr = map->m_pblk + block_in_file - map->m_lblk; | |
1650 | SetPageMappedToDisk(page); | |
1651 | ||
4969c06a JK |
1652 | if (!PageUptodate(page) && (!PageSwapCache(page) && |
1653 | !cleancache_get_page(page))) { | |
2df0ab04 CY |
1654 | SetPageUptodate(page); |
1655 | goto confused; | |
1656 | } | |
1657 | ||
1658 | if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr, | |
93770ab7 | 1659 | DATA_GENERIC_ENHANCE_READ)) { |
10f966bb | 1660 | ret = -EFSCORRUPTED; |
2df0ab04 CY |
1661 | goto out; |
1662 | } | |
1663 | } else { | |
1664 | zero_out: | |
1665 | zero_user_segment(page, 0, PAGE_SIZE); | |
1666 | if (!PageUptodate(page)) | |
1667 | SetPageUptodate(page); | |
1668 | unlock_page(page); | |
1669 | goto out; | |
1670 | } | |
1671 | ||
1672 | /* | |
1673 | * This page will go to BIO. Do we need to send this | |
1674 | * BIO off first? | |
1675 | */ | |
8896cbdf CY |
1676 | if (bio && !page_is_mergeable(F2FS_I_SB(inode), bio, |
1677 | *last_block_in_bio, block_nr)) { | |
2df0ab04 CY |
1678 | submit_and_realloc: |
1679 | __submit_bio(F2FS_I_SB(inode), bio, DATA); | |
1680 | bio = NULL; | |
1681 | } | |
1682 | if (bio == NULL) { | |
1683 | bio = f2fs_grab_read_bio(inode, block_nr, nr_pages, | |
1684 | is_readahead ? REQ_RAHEAD : 0); | |
1685 | if (IS_ERR(bio)) { | |
1686 | ret = PTR_ERR(bio); | |
1687 | bio = NULL; | |
1688 | goto out; | |
1689 | } | |
1690 | } | |
1691 | ||
1692 | /* | |
1693 | * If the page is under writeback, we need to wait for | |
1694 | * its completion to see the correct decrypted data. | |
1695 | */ | |
1696 | f2fs_wait_on_block_writeback(inode, block_nr); | |
1697 | ||
1698 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1699 | goto submit_and_realloc; | |
1700 | ||
1701 | inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA); | |
1702 | ClearPageError(page); | |
1703 | *last_block_in_bio = block_nr; | |
1704 | goto out; | |
1705 | confused: | |
1706 | if (bio) { | |
1707 | __submit_bio(F2FS_I_SB(inode), bio, DATA); | |
1708 | bio = NULL; | |
1709 | } | |
1710 | unlock_page(page); | |
1711 | out: | |
1712 | *bio_ret = bio; | |
1713 | return ret; | |
1714 | } | |
1715 | ||
f1e88660 JK |
1716 | /* |
1717 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1718 | * Major change was from block_size == page_size in f2fs by default. | |
e2e59414 JK |
1719 | * |
1720 | * Note that the aops->readpages() function is ONLY used for read-ahead. If | |
1721 | * this function ever deviates from doing just read-ahead, it should either | |
1722 | * use ->readpage() or do the necessary surgery to decouple ->readpages() | |
1723 | * from read-ahead. | |
f1e88660 JK |
1724 | */ |
1725 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1726 | struct list_head *pages, struct page *page, | |
e2e59414 | 1727 | unsigned nr_pages, bool is_readahead) |
f1e88660 JK |
1728 | { |
1729 | struct bio *bio = NULL; | |
f1e88660 JK |
1730 | sector_t last_block_in_bio = 0; |
1731 | struct inode *inode = mapping->host; | |
f1e88660 | 1732 | struct f2fs_map_blocks map; |
2df0ab04 | 1733 | int ret = 0; |
f1e88660 JK |
1734 | |
1735 | map.m_pblk = 0; | |
1736 | map.m_lblk = 0; | |
1737 | map.m_len = 0; | |
1738 | map.m_flags = 0; | |
da85985c | 1739 | map.m_next_pgofs = NULL; |
c4020b2d | 1740 | map.m_next_extent = NULL; |
d5097be5 | 1741 | map.m_seg_type = NO_CHECK_TYPE; |
f9d6d059 | 1742 | map.m_may_create = false; |
f1e88660 | 1743 | |
736c0a74 | 1744 | for (; nr_pages; nr_pages--) { |
f1e88660 | 1745 | if (pages) { |
939afa94 | 1746 | page = list_last_entry(pages, struct page, lru); |
a83d50bc KM |
1747 | |
1748 | prefetchw(&page->flags); | |
f1e88660 JK |
1749 | list_del(&page->lru); |
1750 | if (add_to_page_cache_lru(page, mapping, | |
4969c06a | 1751 | page_index(page), |
8a5c743e | 1752 | readahead_gfp_mask(mapping))) |
f1e88660 JK |
1753 | goto next_page; |
1754 | } | |
1755 | ||
2df0ab04 CY |
1756 | ret = f2fs_read_single_page(inode, page, nr_pages, &map, &bio, |
1757 | &last_block_in_bio, is_readahead); | |
1758 | if (ret) { | |
1759 | SetPageError(page); | |
09cbfeaf | 1760 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 | 1761 | unlock_page(page); |
f1e88660 | 1762 | } |
f1e88660 JK |
1763 | next_page: |
1764 | if (pages) | |
09cbfeaf | 1765 | put_page(page); |
f1e88660 JK |
1766 | } |
1767 | BUG_ON(pages && !list_empty(pages)); | |
1768 | if (bio) | |
4fc29c1a | 1769 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
2df0ab04 | 1770 | return pages ? 0 : ret; |
f1e88660 JK |
1771 | } |
1772 | ||
eb47b800 JK |
1773 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1774 | { | |
4969c06a | 1775 | struct inode *inode = page_file_mapping(page)->host; |
b3d208f9 | 1776 | int ret = -EAGAIN; |
9ffe0fb5 | 1777 | |
c20e89cd CY |
1778 | trace_f2fs_readpage(page, DATA); |
1779 | ||
e1c42045 | 1780 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1781 | if (f2fs_has_inline_data(inode)) |
1782 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1783 | if (ret == -EAGAIN) |
4969c06a JK |
1784 | ret = f2fs_mpage_readpages(page_file_mapping(page), |
1785 | NULL, page, 1, false); | |
9ffe0fb5 | 1786 | return ret; |
eb47b800 JK |
1787 | } |
1788 | ||
1789 | static int f2fs_read_data_pages(struct file *file, | |
1790 | struct address_space *mapping, | |
1791 | struct list_head *pages, unsigned nr_pages) | |
1792 | { | |
71cb4aff | 1793 | struct inode *inode = mapping->host; |
939afa94 | 1794 | struct page *page = list_last_entry(pages, struct page, lru); |
b8c29400 CY |
1795 | |
1796 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1797 | |
1798 | /* If the file has inline data, skip readpages */ | |
1799 | if (f2fs_has_inline_data(inode)) | |
1800 | return 0; | |
1801 | ||
e2e59414 | 1802 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages, true); |
eb47b800 JK |
1803 | } |
1804 | ||
7eab0c0d HP |
1805 | static int encrypt_one_page(struct f2fs_io_info *fio) |
1806 | { | |
1807 | struct inode *inode = fio->page->mapping->host; | |
6aa58d8a | 1808 | struct page *mpage; |
7eab0c0d HP |
1809 | gfp_t gfp_flags = GFP_NOFS; |
1810 | ||
1958593e | 1811 | if (!f2fs_encrypted_file(inode)) |
7eab0c0d HP |
1812 | return 0; |
1813 | ||
6dbb1796 | 1814 | /* wait for GCed page writeback via META_MAPPING */ |
0ded69f6 | 1815 | f2fs_wait_on_block_writeback(inode, fio->old_blkaddr); |
7eab0c0d HP |
1816 | |
1817 | retry_encrypt: | |
53bc1d85 EB |
1818 | fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(fio->page, |
1819 | PAGE_SIZE, 0, | |
1820 | gfp_flags); | |
6aa58d8a CY |
1821 | if (IS_ERR(fio->encrypted_page)) { |
1822 | /* flush pending IOs and wait for a while in the ENOMEM case */ | |
1823 | if (PTR_ERR(fio->encrypted_page) == -ENOMEM) { | |
1824 | f2fs_flush_merged_writes(fio->sbi); | |
1825 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1826 | gfp_flags |= __GFP_NOFAIL; | |
1827 | goto retry_encrypt; | |
1828 | } | |
1829 | return PTR_ERR(fio->encrypted_page); | |
1830 | } | |
7eab0c0d | 1831 | |
6aa58d8a CY |
1832 | mpage = find_lock_page(META_MAPPING(fio->sbi), fio->old_blkaddr); |
1833 | if (mpage) { | |
1834 | if (PageUptodate(mpage)) | |
1835 | memcpy(page_address(mpage), | |
1836 | page_address(fio->encrypted_page), PAGE_SIZE); | |
1837 | f2fs_put_page(mpage, 1); | |
7eab0c0d | 1838 | } |
6aa58d8a | 1839 | return 0; |
7eab0c0d HP |
1840 | } |
1841 | ||
bb9e3bb8 CY |
1842 | static inline bool check_inplace_update_policy(struct inode *inode, |
1843 | struct f2fs_io_info *fio) | |
7eab0c0d | 1844 | { |
bb9e3bb8 CY |
1845 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1846 | unsigned int policy = SM_I(sbi)->ipu_policy; | |
7eab0c0d | 1847 | |
bb9e3bb8 CY |
1848 | if (policy & (0x1 << F2FS_IPU_FORCE)) |
1849 | return true; | |
4d57b86d | 1850 | if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi)) |
bb9e3bb8 CY |
1851 | return true; |
1852 | if (policy & (0x1 << F2FS_IPU_UTIL) && | |
1853 | utilization(sbi) > SM_I(sbi)->min_ipu_util) | |
1854 | return true; | |
4d57b86d | 1855 | if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) && |
bb9e3bb8 CY |
1856 | utilization(sbi) > SM_I(sbi)->min_ipu_util) |
1857 | return true; | |
1858 | ||
1859 | /* | |
1860 | * IPU for rewrite async pages | |
1861 | */ | |
1862 | if (policy & (0x1 << F2FS_IPU_ASYNC) && | |
1863 | fio && fio->op == REQ_OP_WRITE && | |
1864 | !(fio->op_flags & REQ_SYNC) && | |
62230e0d | 1865 | !IS_ENCRYPTED(inode)) |
bb9e3bb8 CY |
1866 | return true; |
1867 | ||
1868 | /* this is only set during fdatasync */ | |
1869 | if (policy & (0x1 << F2FS_IPU_FSYNC) && | |
1870 | is_inode_flag_set(inode, FI_NEED_IPU)) | |
1871 | return true; | |
1872 | ||
4354994f DR |
1873 | if (unlikely(fio && is_sbi_flag_set(sbi, SBI_CP_DISABLED) && |
1874 | !f2fs_is_checkpointed_data(sbi, fio->old_blkaddr))) | |
1875 | return true; | |
1876 | ||
bb9e3bb8 CY |
1877 | return false; |
1878 | } | |
1879 | ||
4d57b86d | 1880 | bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio) |
bb9e3bb8 | 1881 | { |
1ad71a27 JK |
1882 | if (f2fs_is_pinned_file(inode)) |
1883 | return true; | |
bb9e3bb8 CY |
1884 | |
1885 | /* if this is cold file, we should overwrite to avoid fragmentation */ | |
1886 | if (file_is_cold(inode)) | |
1887 | return true; | |
1888 | ||
1889 | return check_inplace_update_policy(inode, fio); | |
1890 | } | |
1891 | ||
4d57b86d | 1892 | bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio) |
bb9e3bb8 CY |
1893 | { |
1894 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1895 | ||
1896 | if (test_opt(sbi, LFS)) | |
1897 | return true; | |
1898 | if (S_ISDIR(inode->i_mode)) | |
1899 | return true; | |
af033b2a CY |
1900 | if (IS_NOQUOTA(inode)) |
1901 | return true; | |
bb9e3bb8 CY |
1902 | if (f2fs_is_atomic_file(inode)) |
1903 | return true; | |
1904 | if (fio) { | |
1905 | if (is_cold_data(fio->page)) | |
1906 | return true; | |
1907 | if (IS_ATOMIC_WRITTEN_PAGE(fio->page)) | |
1908 | return true; | |
4354994f DR |
1909 | if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) && |
1910 | f2fs_is_checkpointed_data(sbi, fio->old_blkaddr))) | |
1911 | return true; | |
bb9e3bb8 CY |
1912 | } |
1913 | return false; | |
1914 | } | |
1915 | ||
7eab0c0d HP |
1916 | static inline bool need_inplace_update(struct f2fs_io_info *fio) |
1917 | { | |
1918 | struct inode *inode = fio->page->mapping->host; | |
1919 | ||
4d57b86d | 1920 | if (f2fs_should_update_outplace(inode, fio)) |
7eab0c0d HP |
1921 | return false; |
1922 | ||
4d57b86d | 1923 | return f2fs_should_update_inplace(inode, fio); |
7eab0c0d HP |
1924 | } |
1925 | ||
4d57b86d | 1926 | int f2fs_do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1927 | { |
05ca3632 | 1928 | struct page *page = fio->page; |
eb47b800 | 1929 | struct inode *inode = page->mapping->host; |
eb47b800 | 1930 | struct dnode_of_data dn; |
e959c8f5 | 1931 | struct extent_info ei = {0,0,0}; |
7735730d | 1932 | struct node_info ni; |
e959c8f5 | 1933 | bool ipu_force = false; |
eb47b800 JK |
1934 | int err = 0; |
1935 | ||
1936 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
e959c8f5 HP |
1937 | if (need_inplace_update(fio) && |
1938 | f2fs_lookup_extent_cache(inode, page->index, &ei)) { | |
1939 | fio->old_blkaddr = ei.blk + page->index - ei.fofs; | |
a817737e | 1940 | |
c9b60788 | 1941 | if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, |
93770ab7 | 1942 | DATA_GENERIC_ENHANCE)) |
10f966bb | 1943 | return -EFSCORRUPTED; |
c9b60788 CY |
1944 | |
1945 | ipu_force = true; | |
1946 | fio->need_lock = LOCK_DONE; | |
1947 | goto got_it; | |
e959c8f5 | 1948 | } |
279d6df2 | 1949 | |
d29460e5 JK |
1950 | /* Deadlock due to between page->lock and f2fs_lock_op */ |
1951 | if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi)) | |
1952 | return -EAGAIN; | |
279d6df2 | 1953 | |
4d57b86d | 1954 | err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 | 1955 | if (err) |
279d6df2 | 1956 | goto out; |
eb47b800 | 1957 | |
28bc106b | 1958 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1959 | |
1960 | /* This page is already truncated */ | |
7a9d7548 | 1961 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1962 | ClearPageUptodate(page); |
2baf0781 | 1963 | clear_cold_data(page); |
eb47b800 | 1964 | goto out_writepage; |
2bca1e23 | 1965 | } |
e959c8f5 | 1966 | got_it: |
c9b60788 CY |
1967 | if (__is_valid_data_blkaddr(fio->old_blkaddr) && |
1968 | !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, | |
93770ab7 | 1969 | DATA_GENERIC_ENHANCE)) { |
10f966bb | 1970 | err = -EFSCORRUPTED; |
c9b60788 CY |
1971 | goto out_writepage; |
1972 | } | |
eb47b800 JK |
1973 | /* |
1974 | * If current allocation needs SSR, | |
1975 | * it had better in-place writes for updated data. | |
1976 | */ | |
93770ab7 CY |
1977 | if (ipu_force || |
1978 | (__is_valid_data_blkaddr(fio->old_blkaddr) && | |
7b525dd0 | 1979 | need_inplace_update(fio))) { |
cc15620b JK |
1980 | err = encrypt_one_page(fio); |
1981 | if (err) | |
1982 | goto out_writepage; | |
1983 | ||
1984 | set_page_writeback(page); | |
17c50035 | 1985 | ClearPageError(page); |
279d6df2 | 1986 | f2fs_put_dnode(&dn); |
cc15620b | 1987 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 1988 | f2fs_unlock_op(fio->sbi); |
4d57b86d | 1989 | err = f2fs_inplace_write_data(fio); |
6492a335 CY |
1990 | if (err) { |
1991 | if (f2fs_encrypted_file(inode)) | |
d2d0727b | 1992 | fscrypt_finalize_bounce_page(&fio->encrypted_page); |
6492a335 CY |
1993 | if (PageWriteback(page)) |
1994 | end_page_writeback(page); | |
cd23ffa9 CY |
1995 | } else { |
1996 | set_inode_flag(inode, FI_UPDATE_WRITE); | |
6492a335 | 1997 | } |
7eab0c0d | 1998 | trace_f2fs_do_write_data_page(fio->page, IPU); |
279d6df2 | 1999 | return err; |
eb47b800 | 2000 | } |
279d6df2 | 2001 | |
cc15620b JK |
2002 | if (fio->need_lock == LOCK_RETRY) { |
2003 | if (!f2fs_trylock_op(fio->sbi)) { | |
2004 | err = -EAGAIN; | |
2005 | goto out_writepage; | |
2006 | } | |
2007 | fio->need_lock = LOCK_REQ; | |
2008 | } | |
2009 | ||
7735730d CY |
2010 | err = f2fs_get_node_info(fio->sbi, dn.nid, &ni); |
2011 | if (err) | |
2012 | goto out_writepage; | |
2013 | ||
2014 | fio->version = ni.version; | |
2015 | ||
cc15620b JK |
2016 | err = encrypt_one_page(fio); |
2017 | if (err) | |
2018 | goto out_writepage; | |
2019 | ||
2020 | set_page_writeback(page); | |
17c50035 | 2021 | ClearPageError(page); |
cc15620b | 2022 | |
279d6df2 | 2023 | /* LFS mode write path */ |
4d57b86d | 2024 | f2fs_outplace_write_data(&dn, fio); |
279d6df2 HP |
2025 | trace_f2fs_do_write_data_page(page, OPU); |
2026 | set_inode_flag(inode, FI_APPEND_WRITE); | |
2027 | if (page->index == 0) | |
2028 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
2029 | out_writepage: |
2030 | f2fs_put_dnode(&dn); | |
279d6df2 | 2031 | out: |
cc15620b | 2032 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 2033 | f2fs_unlock_op(fio->sbi); |
eb47b800 JK |
2034 | return err; |
2035 | } | |
2036 | ||
d68f735b | 2037 | static int __write_data_page(struct page *page, bool *submitted, |
8648de2c CY |
2038 | struct bio **bio, |
2039 | sector_t *last_block, | |
b0af6d49 CY |
2040 | struct writeback_control *wbc, |
2041 | enum iostat_type io_type) | |
eb47b800 JK |
2042 | { |
2043 | struct inode *inode = page->mapping->host; | |
4081363f | 2044 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
2045 | loff_t i_size = i_size_read(inode); |
2046 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 2047 | >> PAGE_SHIFT; |
26de9b11 | 2048 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 2049 | unsigned offset = 0; |
39936837 | 2050 | bool need_balance_fs = false; |
eb47b800 | 2051 | int err = 0; |
458e6197 | 2052 | struct f2fs_io_info fio = { |
05ca3632 | 2053 | .sbi = sbi, |
39d787be | 2054 | .ino = inode->i_ino, |
458e6197 | 2055 | .type = DATA, |
04d328de | 2056 | .op = REQ_OP_WRITE, |
7637241e | 2057 | .op_flags = wbc_to_write_flags(wbc), |
e959c8f5 | 2058 | .old_blkaddr = NULL_ADDR, |
05ca3632 | 2059 | .page = page, |
4375a336 | 2060 | .encrypted_page = NULL, |
d68f735b | 2061 | .submitted = false, |
cc15620b | 2062 | .need_lock = LOCK_RETRY, |
b0af6d49 | 2063 | .io_type = io_type, |
578c6478 | 2064 | .io_wbc = wbc, |
8648de2c CY |
2065 | .bio = bio, |
2066 | .last_block = last_block, | |
458e6197 | 2067 | }; |
eb47b800 | 2068 | |
ecda0de3 CY |
2069 | trace_f2fs_writepage(page, DATA); |
2070 | ||
db198ae0 CY |
2071 | /* we should bypass data pages to proceed the kworkder jobs */ |
2072 | if (unlikely(f2fs_cp_error(sbi))) { | |
2073 | mapping_set_error(page->mapping, -EIO); | |
1174abfd CY |
2074 | /* |
2075 | * don't drop any dirty dentry pages for keeping lastest | |
2076 | * directory structure. | |
2077 | */ | |
2078 | if (S_ISDIR(inode->i_mode)) | |
2079 | goto redirty_out; | |
db198ae0 CY |
2080 | goto out; |
2081 | } | |
2082 | ||
0771fcc7 CY |
2083 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
2084 | goto redirty_out; | |
2085 | ||
eb47b800 | 2086 | if (page->index < end_index) |
39936837 | 2087 | goto write; |
eb47b800 JK |
2088 | |
2089 | /* | |
2090 | * If the offset is out-of-range of file size, | |
2091 | * this page does not have to be written to disk. | |
2092 | */ | |
09cbfeaf | 2093 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 2094 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 2095 | goto out; |
eb47b800 | 2096 | |
09cbfeaf | 2097 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 2098 | write: |
1e84371f JK |
2099 | if (f2fs_is_drop_cache(inode)) |
2100 | goto out; | |
e6e5f561 JK |
2101 | /* we should not write 0'th page having journal header */ |
2102 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
2103 | (!wbc->for_reclaim && | |
4d57b86d | 2104 | f2fs_available_free_memory(sbi, BASE_CHECK)))) |
1e84371f | 2105 | goto redirty_out; |
eb47b800 | 2106 | |
39936837 | 2107 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 2108 | if (S_ISDIR(inode->i_mode)) { |
cc15620b | 2109 | fio.need_lock = LOCK_DONE; |
4d57b86d | 2110 | err = f2fs_do_write_data_page(&fio); |
8618b881 JK |
2111 | goto done; |
2112 | } | |
9ffe0fb5 | 2113 | |
8618b881 | 2114 | if (!wbc->for_reclaim) |
39936837 | 2115 | need_balance_fs = true; |
7f3037a5 | 2116 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 2117 | goto redirty_out; |
ef095d19 JK |
2118 | else |
2119 | set_inode_flag(inode, FI_HOT_DATA); | |
eb47b800 | 2120 | |
b3d208f9 | 2121 | err = -EAGAIN; |
dd7b2333 | 2122 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 | 2123 | err = f2fs_write_inline_data(inode, page); |
dd7b2333 YH |
2124 | if (!err) |
2125 | goto out; | |
2126 | } | |
279d6df2 | 2127 | |
cc15620b | 2128 | if (err == -EAGAIN) { |
4d57b86d | 2129 | err = f2fs_do_write_data_page(&fio); |
cc15620b JK |
2130 | if (err == -EAGAIN) { |
2131 | fio.need_lock = LOCK_REQ; | |
4d57b86d | 2132 | err = f2fs_do_write_data_page(&fio); |
cc15620b JK |
2133 | } |
2134 | } | |
a0d00fad | 2135 | |
eb449797 CY |
2136 | if (err) { |
2137 | file_set_keep_isize(inode); | |
2138 | } else { | |
2139 | down_write(&F2FS_I(inode)->i_sem); | |
2140 | if (F2FS_I(inode)->last_disk_size < psize) | |
2141 | F2FS_I(inode)->last_disk_size = psize; | |
2142 | up_write(&F2FS_I(inode)->i_sem); | |
2143 | } | |
279d6df2 | 2144 | |
8618b881 JK |
2145 | done: |
2146 | if (err && err != -ENOENT) | |
2147 | goto redirty_out; | |
eb47b800 | 2148 | |
39936837 | 2149 | out: |
a7ffdbe2 | 2150 | inode_dec_dirty_pages(inode); |
2baf0781 | 2151 | if (err) { |
2bca1e23 | 2152 | ClearPageUptodate(page); |
2baf0781 CY |
2153 | clear_cold_data(page); |
2154 | } | |
0c3a5797 CY |
2155 | |
2156 | if (wbc->for_reclaim) { | |
bab475c5 | 2157 | f2fs_submit_merged_write_cond(sbi, NULL, page, 0, DATA); |
ef095d19 | 2158 | clear_inode_flag(inode, FI_HOT_DATA); |
4d57b86d | 2159 | f2fs_remove_dirty_inode(inode); |
d68f735b | 2160 | submitted = NULL; |
0c3a5797 CY |
2161 | } |
2162 | ||
eb47b800 | 2163 | unlock_page(page); |
186857c5 | 2164 | if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) && |
8648de2c CY |
2165 | !F2FS_I(inode)->cp_task) { |
2166 | f2fs_submit_ipu_bio(sbi, bio, page); | |
a7881893 | 2167 | f2fs_balance_fs(sbi, need_balance_fs); |
8648de2c | 2168 | } |
0c3a5797 | 2169 | |
d68f735b | 2170 | if (unlikely(f2fs_cp_error(sbi))) { |
8648de2c | 2171 | f2fs_submit_ipu_bio(sbi, bio, page); |
b9109b0e | 2172 | f2fs_submit_merged_write(sbi, DATA); |
d68f735b JK |
2173 | submitted = NULL; |
2174 | } | |
2175 | ||
2176 | if (submitted) | |
2177 | *submitted = fio.submitted; | |
0c3a5797 | 2178 | |
eb47b800 JK |
2179 | return 0; |
2180 | ||
eb47b800 | 2181 | redirty_out: |
76f60268 | 2182 | redirty_page_for_writepage(wbc, page); |
5b19d284 JK |
2183 | /* |
2184 | * pageout() in MM traslates EAGAIN, so calls handle_write_error() | |
2185 | * -> mapping_set_error() -> set_bit(AS_EIO, ...). | |
2186 | * file_write_and_wait_range() will see EIO error, which is critical | |
2187 | * to return value of fsync() followed by atomic_write failure to user. | |
2188 | */ | |
2189 | if (!err || wbc->for_reclaim) | |
0002b61b | 2190 | return AOP_WRITEPAGE_ACTIVATE; |
b230e6ca JK |
2191 | unlock_page(page); |
2192 | return err; | |
fa9150a8 NJ |
2193 | } |
2194 | ||
f566bae8 JK |
2195 | static int f2fs_write_data_page(struct page *page, |
2196 | struct writeback_control *wbc) | |
2197 | { | |
8648de2c | 2198 | return __write_data_page(page, NULL, NULL, NULL, wbc, FS_DATA_IO); |
f566bae8 JK |
2199 | } |
2200 | ||
8f46dcae CY |
2201 | /* |
2202 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
2203 | * The major change is making write step of cold data page separately from | |
2204 | * warm/hot data page. | |
2205 | */ | |
2206 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b0af6d49 CY |
2207 | struct writeback_control *wbc, |
2208 | enum iostat_type io_type) | |
8f46dcae CY |
2209 | { |
2210 | int ret = 0; | |
2211 | int done = 0; | |
2212 | struct pagevec pvec; | |
c29fd0c0 | 2213 | struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); |
8648de2c CY |
2214 | struct bio *bio = NULL; |
2215 | sector_t last_block; | |
8f46dcae CY |
2216 | int nr_pages; |
2217 | pgoff_t uninitialized_var(writeback_index); | |
2218 | pgoff_t index; | |
2219 | pgoff_t end; /* Inclusive */ | |
2220 | pgoff_t done_index; | |
2221 | int cycled; | |
2222 | int range_whole = 0; | |
10bbd235 | 2223 | xa_mark_t tag; |
bab475c5 | 2224 | int nwritten = 0; |
8f46dcae | 2225 | |
86679820 | 2226 | pagevec_init(&pvec); |
46ae957f | 2227 | |
ef095d19 JK |
2228 | if (get_dirty_pages(mapping->host) <= |
2229 | SM_I(F2FS_M_SB(mapping))->min_hot_blocks) | |
2230 | set_inode_flag(mapping->host, FI_HOT_DATA); | |
2231 | else | |
2232 | clear_inode_flag(mapping->host, FI_HOT_DATA); | |
2233 | ||
8f46dcae CY |
2234 | if (wbc->range_cyclic) { |
2235 | writeback_index = mapping->writeback_index; /* prev offset */ | |
2236 | index = writeback_index; | |
2237 | if (index == 0) | |
2238 | cycled = 1; | |
2239 | else | |
2240 | cycled = 0; | |
2241 | end = -1; | |
2242 | } else { | |
09cbfeaf KS |
2243 | index = wbc->range_start >> PAGE_SHIFT; |
2244 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
2245 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
2246 | range_whole = 1; | |
2247 | cycled = 1; /* ignore range_cyclic tests */ | |
2248 | } | |
2249 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
2250 | tag = PAGECACHE_TAG_TOWRITE; | |
2251 | else | |
2252 | tag = PAGECACHE_TAG_DIRTY; | |
2253 | retry: | |
2254 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
2255 | tag_pages_for_writeback(mapping, index, end); | |
2256 | done_index = index; | |
2257 | while (!done && (index <= end)) { | |
2258 | int i; | |
2259 | ||
69c4f35d | 2260 | nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, |
67fd707f | 2261 | tag); |
8f46dcae CY |
2262 | if (nr_pages == 0) |
2263 | break; | |
2264 | ||
2265 | for (i = 0; i < nr_pages; i++) { | |
2266 | struct page *page = pvec.pages[i]; | |
d68f735b | 2267 | bool submitted = false; |
8f46dcae | 2268 | |
f8de4331 | 2269 | /* give a priority to WB_SYNC threads */ |
c29fd0c0 | 2270 | if (atomic_read(&sbi->wb_sync_req[DATA]) && |
f8de4331 CY |
2271 | wbc->sync_mode == WB_SYNC_NONE) { |
2272 | done = 1; | |
2273 | break; | |
2274 | } | |
2275 | ||
8f46dcae | 2276 | done_index = page->index; |
d29460e5 | 2277 | retry_write: |
8f46dcae CY |
2278 | lock_page(page); |
2279 | ||
2280 | if (unlikely(page->mapping != mapping)) { | |
2281 | continue_unlock: | |
2282 | unlock_page(page); | |
2283 | continue; | |
2284 | } | |
2285 | ||
2286 | if (!PageDirty(page)) { | |
2287 | /* someone wrote it for us */ | |
2288 | goto continue_unlock; | |
2289 | } | |
2290 | ||
8f46dcae | 2291 | if (PageWriteback(page)) { |
8648de2c | 2292 | if (wbc->sync_mode != WB_SYNC_NONE) { |
fec1d657 | 2293 | f2fs_wait_on_page_writeback(page, |
bae0ee7a | 2294 | DATA, true, true); |
8648de2c CY |
2295 | f2fs_submit_ipu_bio(sbi, &bio, page); |
2296 | } else { | |
8f46dcae | 2297 | goto continue_unlock; |
8648de2c | 2298 | } |
8f46dcae CY |
2299 | } |
2300 | ||
8f46dcae CY |
2301 | if (!clear_page_dirty_for_io(page)) |
2302 | goto continue_unlock; | |
2303 | ||
8648de2c CY |
2304 | ret = __write_data_page(page, &submitted, &bio, |
2305 | &last_block, wbc, io_type); | |
8f46dcae | 2306 | if (unlikely(ret)) { |
0002b61b CY |
2307 | /* |
2308 | * keep nr_to_write, since vfs uses this to | |
2309 | * get # of written pages. | |
2310 | */ | |
2311 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
2312 | unlock_page(page); | |
2313 | ret = 0; | |
2314 | continue; | |
d29460e5 JK |
2315 | } else if (ret == -EAGAIN) { |
2316 | ret = 0; | |
2317 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
2318 | cond_resched(); | |
2319 | congestion_wait(BLK_RW_ASYNC, | |
2320 | HZ/50); | |
2321 | goto retry_write; | |
2322 | } | |
2323 | continue; | |
0002b61b | 2324 | } |
b230e6ca JK |
2325 | done_index = page->index + 1; |
2326 | done = 1; | |
2327 | break; | |
d68f735b | 2328 | } else if (submitted) { |
bab475c5 | 2329 | nwritten++; |
8f46dcae CY |
2330 | } |
2331 | ||
f8de4331 | 2332 | if (--wbc->nr_to_write <= 0 && |
687de7f1 | 2333 | wbc->sync_mode == WB_SYNC_NONE) { |
8f46dcae CY |
2334 | done = 1; |
2335 | break; | |
2336 | } | |
2337 | } | |
2338 | pagevec_release(&pvec); | |
2339 | cond_resched(); | |
2340 | } | |
2341 | ||
8f46dcae CY |
2342 | if (!cycled && !done) { |
2343 | cycled = 1; | |
2344 | index = 0; | |
2345 | end = writeback_index - 1; | |
2346 | goto retry; | |
2347 | } | |
2348 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
2349 | mapping->writeback_index = done_index; | |
2350 | ||
bab475c5 | 2351 | if (nwritten) |
b9109b0e | 2352 | f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host, |
bab475c5 | 2353 | NULL, 0, DATA); |
8648de2c CY |
2354 | /* submit cached bio of IPU write */ |
2355 | if (bio) | |
2356 | __submit_bio(sbi, bio, DATA); | |
6ca56ca4 | 2357 | |
8f46dcae CY |
2358 | return ret; |
2359 | } | |
2360 | ||
853137ce JK |
2361 | static inline bool __should_serialize_io(struct inode *inode, |
2362 | struct writeback_control *wbc) | |
2363 | { | |
2364 | if (!S_ISREG(inode->i_mode)) | |
2365 | return false; | |
af033b2a CY |
2366 | if (IS_NOQUOTA(inode)) |
2367 | return false; | |
040d2bb3 CY |
2368 | /* to avoid deadlock in path of data flush */ |
2369 | if (F2FS_I(inode)->cp_task) | |
2370 | return false; | |
853137ce JK |
2371 | if (wbc->sync_mode != WB_SYNC_ALL) |
2372 | return true; | |
2373 | if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks) | |
2374 | return true; | |
2375 | return false; | |
2376 | } | |
2377 | ||
fc99fe27 | 2378 | static int __f2fs_write_data_pages(struct address_space *mapping, |
b0af6d49 CY |
2379 | struct writeback_control *wbc, |
2380 | enum iostat_type io_type) | |
eb47b800 JK |
2381 | { |
2382 | struct inode *inode = mapping->host; | |
4081363f | 2383 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 2384 | struct blk_plug plug; |
eb47b800 | 2385 | int ret; |
853137ce | 2386 | bool locked = false; |
eb47b800 | 2387 | |
cfb185a1 | 2388 | /* deal with chardevs and other special file */ |
2389 | if (!mapping->a_ops->writepage) | |
2390 | return 0; | |
2391 | ||
6a290544 CY |
2392 | /* skip writing if there is no dirty page in this inode */ |
2393 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
2394 | return 0; | |
2395 | ||
0771fcc7 CY |
2396 | /* during POR, we don't need to trigger writepage at all. */ |
2397 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
2398 | goto skip_write; | |
2399 | ||
af033b2a CY |
2400 | if ((S_ISDIR(inode->i_mode) || IS_NOQUOTA(inode)) && |
2401 | wbc->sync_mode == WB_SYNC_NONE && | |
a1257023 | 2402 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && |
4d57b86d | 2403 | f2fs_available_free_memory(sbi, DIRTY_DENTS)) |
a1257023 JK |
2404 | goto skip_write; |
2405 | ||
d323d005 | 2406 | /* skip writing during file defragment */ |
91942321 | 2407 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
2408 | goto skip_write; |
2409 | ||
d31c7c3f YH |
2410 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
2411 | ||
687de7f1 JK |
2412 | /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */ |
2413 | if (wbc->sync_mode == WB_SYNC_ALL) | |
c29fd0c0 CY |
2414 | atomic_inc(&sbi->wb_sync_req[DATA]); |
2415 | else if (atomic_read(&sbi->wb_sync_req[DATA])) | |
687de7f1 JK |
2416 | goto skip_write; |
2417 | ||
853137ce JK |
2418 | if (__should_serialize_io(inode, wbc)) { |
2419 | mutex_lock(&sbi->writepages); | |
2420 | locked = true; | |
2421 | } | |
2422 | ||
9dfa1baf | 2423 | blk_start_plug(&plug); |
b0af6d49 | 2424 | ret = f2fs_write_cache_pages(mapping, wbc, io_type); |
9dfa1baf | 2425 | blk_finish_plug(&plug); |
687de7f1 | 2426 | |
853137ce JK |
2427 | if (locked) |
2428 | mutex_unlock(&sbi->writepages); | |
2429 | ||
687de7f1 | 2430 | if (wbc->sync_mode == WB_SYNC_ALL) |
c29fd0c0 | 2431 | atomic_dec(&sbi->wb_sync_req[DATA]); |
28ea6162 JK |
2432 | /* |
2433 | * if some pages were truncated, we cannot guarantee its mapping->host | |
2434 | * to detect pending bios. | |
2435 | */ | |
458e6197 | 2436 | |
4d57b86d | 2437 | f2fs_remove_dirty_inode(inode); |
eb47b800 | 2438 | return ret; |
d3baf95d JK |
2439 | |
2440 | skip_write: | |
a7ffdbe2 | 2441 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 2442 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 2443 | return 0; |
eb47b800 JK |
2444 | } |
2445 | ||
b0af6d49 CY |
2446 | static int f2fs_write_data_pages(struct address_space *mapping, |
2447 | struct writeback_control *wbc) | |
2448 | { | |
2449 | struct inode *inode = mapping->host; | |
2450 | ||
2451 | return __f2fs_write_data_pages(mapping, wbc, | |
2452 | F2FS_I(inode)->cp_task == current ? | |
2453 | FS_CP_DATA_IO : FS_DATA_IO); | |
2454 | } | |
2455 | ||
3aab8f82 CY |
2456 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
2457 | { | |
2458 | struct inode *inode = mapping->host; | |
819d9153 | 2459 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 2460 | |
819d9153 | 2461 | if (to > i_size) { |
a33c1502 | 2462 | down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
6f8d4455 | 2463 | down_write(&F2FS_I(inode)->i_mmap_sem); |
a33c1502 | 2464 | |
819d9153 | 2465 | truncate_pagecache(inode, i_size); |
c42d28ce CY |
2466 | if (!IS_NOQUOTA(inode)) |
2467 | f2fs_truncate_blocks(inode, i_size, true); | |
a33c1502 | 2468 | |
5a3a2d83 | 2469 | up_write(&F2FS_I(inode)->i_mmap_sem); |
6f8d4455 | 2470 | up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]); |
3aab8f82 CY |
2471 | } |
2472 | } | |
2473 | ||
2aadac08 JK |
2474 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
2475 | struct page *page, loff_t pos, unsigned len, | |
2476 | block_t *blk_addr, bool *node_changed) | |
2477 | { | |
2478 | struct inode *inode = page->mapping->host; | |
2479 | pgoff_t index = page->index; | |
2480 | struct dnode_of_data dn; | |
2481 | struct page *ipage; | |
b4d07a3e | 2482 | bool locked = false; |
e15882b6 | 2483 | struct extent_info ei = {0,0,0}; |
2aadac08 | 2484 | int err = 0; |
2866fb16 | 2485 | int flag; |
2aadac08 | 2486 | |
24b84912 JK |
2487 | /* |
2488 | * we already allocated all the blocks, so we don't need to get | |
2489 | * the block addresses when there is no need to fill the page. | |
2490 | */ | |
dc91de78 JK |
2491 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE && |
2492 | !is_inode_flag_set(inode, FI_NO_PREALLOC)) | |
24b84912 JK |
2493 | return 0; |
2494 | ||
2866fb16 SY |
2495 | /* f2fs_lock_op avoids race between write CP and convert_inline_page */ |
2496 | if (f2fs_has_inline_data(inode) && pos + len > MAX_INLINE_DATA(inode)) | |
2497 | flag = F2FS_GET_BLOCK_DEFAULT; | |
2498 | else | |
2499 | flag = F2FS_GET_BLOCK_PRE_AIO; | |
2500 | ||
b4d07a3e | 2501 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 2502 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
2866fb16 | 2503 | __do_map_lock(sbi, flag, true); |
b4d07a3e JK |
2504 | locked = true; |
2505 | } | |
2506 | restart: | |
2aadac08 | 2507 | /* check inline_data */ |
4d57b86d | 2508 | ipage = f2fs_get_node_page(sbi, inode->i_ino); |
2aadac08 JK |
2509 | if (IS_ERR(ipage)) { |
2510 | err = PTR_ERR(ipage); | |
2511 | goto unlock_out; | |
2512 | } | |
2513 | ||
2514 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
2515 | ||
2516 | if (f2fs_has_inline_data(inode)) { | |
f2470371 | 2517 | if (pos + len <= MAX_INLINE_DATA(inode)) { |
4d57b86d | 2518 | f2fs_do_read_inline_data(page, ipage); |
91942321 | 2519 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
2520 | if (inode->i_nlink) |
2521 | set_inline_node(ipage); | |
2aadac08 JK |
2522 | } else { |
2523 | err = f2fs_convert_inline_page(&dn, page); | |
2524 | if (err) | |
b4d07a3e JK |
2525 | goto out; |
2526 | if (dn.data_blkaddr == NULL_ADDR) | |
2527 | err = f2fs_get_block(&dn, index); | |
2528 | } | |
2529 | } else if (locked) { | |
2530 | err = f2fs_get_block(&dn, index); | |
2531 | } else { | |
2532 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
2533 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
2534 | } else { | |
b4d07a3e | 2535 | /* hole case */ |
4d57b86d | 2536 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); |
4da7bf5a | 2537 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e | 2538 | f2fs_put_dnode(&dn); |
59c9081b YH |
2539 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, |
2540 | true); | |
2866fb16 | 2541 | WARN_ON(flag != F2FS_GET_BLOCK_PRE_AIO); |
b4d07a3e JK |
2542 | locked = true; |
2543 | goto restart; | |
2544 | } | |
2aadac08 JK |
2545 | } |
2546 | } | |
b4d07a3e | 2547 | |
2aadac08 JK |
2548 | /* convert_inline_page can make node_changed */ |
2549 | *blk_addr = dn.data_blkaddr; | |
2550 | *node_changed = dn.node_changed; | |
b4d07a3e | 2551 | out: |
2aadac08 JK |
2552 | f2fs_put_dnode(&dn); |
2553 | unlock_out: | |
b4d07a3e | 2554 | if (locked) |
2866fb16 | 2555 | __do_map_lock(sbi, flag, false); |
2aadac08 JK |
2556 | return err; |
2557 | } | |
2558 | ||
eb47b800 JK |
2559 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
2560 | loff_t pos, unsigned len, unsigned flags, | |
2561 | struct page **pagep, void **fsdata) | |
2562 | { | |
2563 | struct inode *inode = mapping->host; | |
4081363f | 2564 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 2565 | struct page *page = NULL; |
09cbfeaf | 2566 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
a2e2e76b | 2567 | bool need_balance = false, drop_atomic = false; |
2aadac08 | 2568 | block_t blkaddr = NULL_ADDR; |
eb47b800 JK |
2569 | int err = 0; |
2570 | ||
62aed044 CY |
2571 | trace_f2fs_write_begin(inode, pos, len, flags); |
2572 | ||
00e09c0b CY |
2573 | if (!f2fs_is_checkpoint_ready(sbi)) { |
2574 | err = -ENOSPC; | |
4354994f | 2575 | goto fail; |
00e09c0b | 2576 | } |
4354994f | 2577 | |
455e3a58 JK |
2578 | if ((f2fs_is_atomic_file(inode) && |
2579 | !f2fs_available_free_memory(sbi, INMEM_PAGES)) || | |
2580 | is_inode_flag_set(inode, FI_ATOMIC_REVOKE_REQUEST)) { | |
57864ae5 | 2581 | err = -ENOMEM; |
a2e2e76b | 2582 | drop_atomic = true; |
57864ae5 JK |
2583 | goto fail; |
2584 | } | |
2585 | ||
5f727395 JK |
2586 | /* |
2587 | * We should check this at this moment to avoid deadlock on inode page | |
2588 | * and #0 page. The locking rule for inline_data conversion should be: | |
2589 | * lock_page(page #0) -> lock_page(inode_page) | |
2590 | */ | |
2591 | if (index != 0) { | |
2592 | err = f2fs_convert_inline_inode(inode); | |
2593 | if (err) | |
2594 | goto fail; | |
2595 | } | |
afcb7ca0 | 2596 | repeat: |
86d54795 JK |
2597 | /* |
2598 | * Do not use grab_cache_page_write_begin() to avoid deadlock due to | |
2599 | * wait_for_stable_page. Will wait that below with our IO control. | |
2600 | */ | |
01eccef7 | 2601 | page = f2fs_pagecache_get_page(mapping, index, |
86d54795 | 2602 | FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS); |
3aab8f82 CY |
2603 | if (!page) { |
2604 | err = -ENOMEM; | |
2605 | goto fail; | |
2606 | } | |
d5f66990 | 2607 | |
eb47b800 JK |
2608 | *pagep = page; |
2609 | ||
2aadac08 JK |
2610 | err = prepare_write_begin(sbi, page, pos, len, |
2611 | &blkaddr, &need_balance); | |
9ba69cf9 | 2612 | if (err) |
2aadac08 | 2613 | goto fail; |
9ba69cf9 | 2614 | |
af033b2a CY |
2615 | if (need_balance && !IS_NOQUOTA(inode) && |
2616 | has_not_enough_free_secs(sbi, 0, 0)) { | |
2a340760 | 2617 | unlock_page(page); |
2c4db1a6 | 2618 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
2619 | lock_page(page); |
2620 | if (page->mapping != mapping) { | |
2621 | /* The page got truncated from under us */ | |
2622 | f2fs_put_page(page, 1); | |
2623 | goto repeat; | |
2624 | } | |
2625 | } | |
2626 | ||
bae0ee7a | 2627 | f2fs_wait_on_page_writeback(page, DATA, false, true); |
b3d208f9 | 2628 | |
649d7df2 JK |
2629 | if (len == PAGE_SIZE || PageUptodate(page)) |
2630 | return 0; | |
eb47b800 | 2631 | |
746e2403 YH |
2632 | if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) { |
2633 | zero_user_segment(page, len, PAGE_SIZE); | |
2634 | return 0; | |
2635 | } | |
2636 | ||
2aadac08 | 2637 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 2638 | zero_user_segment(page, 0, PAGE_SIZE); |
649d7df2 | 2639 | SetPageUptodate(page); |
eb47b800 | 2640 | } else { |
93770ab7 CY |
2641 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, |
2642 | DATA_GENERIC_ENHANCE_READ)) { | |
10f966bb | 2643 | err = -EFSCORRUPTED; |
93770ab7 CY |
2644 | goto fail; |
2645 | } | |
13ba41e3 JK |
2646 | err = f2fs_submit_page_read(inode, page, blkaddr); |
2647 | if (err) | |
78682f79 | 2648 | goto fail; |
d54c795b | 2649 | |
393ff91f | 2650 | lock_page(page); |
6bacf52f | 2651 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
2652 | f2fs_put_page(page, 1); |
2653 | goto repeat; | |
eb47b800 | 2654 | } |
1563ac75 CY |
2655 | if (unlikely(!PageUptodate(page))) { |
2656 | err = -EIO; | |
2657 | goto fail; | |
4375a336 | 2658 | } |
eb47b800 | 2659 | } |
eb47b800 | 2660 | return 0; |
9ba69cf9 | 2661 | |
3aab8f82 | 2662 | fail: |
86531d6b | 2663 | f2fs_put_page(page, 1); |
3aab8f82 | 2664 | f2fs_write_failed(mapping, pos + len); |
a2e2e76b | 2665 | if (drop_atomic) |
4d57b86d | 2666 | f2fs_drop_inmem_pages_all(sbi, false); |
3aab8f82 | 2667 | return err; |
eb47b800 JK |
2668 | } |
2669 | ||
a1dd3c13 JK |
2670 | static int f2fs_write_end(struct file *file, |
2671 | struct address_space *mapping, | |
2672 | loff_t pos, unsigned len, unsigned copied, | |
2673 | struct page *page, void *fsdata) | |
2674 | { | |
2675 | struct inode *inode = page->mapping->host; | |
2676 | ||
dfb2bf38 CY |
2677 | trace_f2fs_write_end(inode, pos, len, copied); |
2678 | ||
649d7df2 JK |
2679 | /* |
2680 | * This should be come from len == PAGE_SIZE, and we expect copied | |
2681 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
2682 | * let generic_perform_write() try to copy data again through copied=0. | |
2683 | */ | |
2684 | if (!PageUptodate(page)) { | |
746e2403 | 2685 | if (unlikely(copied != len)) |
649d7df2 JK |
2686 | copied = 0; |
2687 | else | |
2688 | SetPageUptodate(page); | |
2689 | } | |
2690 | if (!copied) | |
2691 | goto unlock_out; | |
2692 | ||
34ba94ba | 2693 | set_page_dirty(page); |
a1dd3c13 | 2694 | |
fc9581c8 JK |
2695 | if (pos + copied > i_size_read(inode)) |
2696 | f2fs_i_size_write(inode, pos + copied); | |
649d7df2 | 2697 | unlock_out: |
3024c9a1 | 2698 | f2fs_put_page(page, 1); |
d0239e1b | 2699 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
2700 | return copied; |
2701 | } | |
2702 | ||
6f673763 OS |
2703 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
2704 | loff_t offset) | |
944fcfc1 | 2705 | { |
8a56dd96 JK |
2706 | unsigned i_blkbits = READ_ONCE(inode->i_blkbits); |
2707 | unsigned blkbits = i_blkbits; | |
2708 | unsigned blocksize_mask = (1 << blkbits) - 1; | |
2709 | unsigned long align = offset | iov_iter_alignment(iter); | |
2710 | struct block_device *bdev = inode->i_sb->s_bdev; | |
2711 | ||
2712 | if (align & blocksize_mask) { | |
2713 | if (bdev) | |
2714 | blkbits = blksize_bits(bdev_logical_block_size(bdev)); | |
2715 | blocksize_mask = (1 << blkbits) - 1; | |
2716 | if (align & blocksize_mask) | |
2717 | return -EINVAL; | |
2718 | return 1; | |
2719 | } | |
944fcfc1 JK |
2720 | return 0; |
2721 | } | |
2722 | ||
02b16d0a CY |
2723 | static void f2fs_dio_end_io(struct bio *bio) |
2724 | { | |
2725 | struct f2fs_private_dio *dio = bio->bi_private; | |
2726 | ||
2727 | dec_page_count(F2FS_I_SB(dio->inode), | |
2728 | dio->write ? F2FS_DIO_WRITE : F2FS_DIO_READ); | |
2729 | ||
2730 | bio->bi_private = dio->orig_private; | |
2731 | bio->bi_end_io = dio->orig_end_io; | |
2732 | ||
5222595d | 2733 | kvfree(dio); |
02b16d0a CY |
2734 | |
2735 | bio_endio(bio); | |
2736 | } | |
2737 | ||
2738 | static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode, | |
2739 | loff_t file_offset) | |
2740 | { | |
2741 | struct f2fs_private_dio *dio; | |
2742 | bool write = (bio_op(bio) == REQ_OP_WRITE); | |
02b16d0a CY |
2743 | |
2744 | dio = f2fs_kzalloc(F2FS_I_SB(inode), | |
2745 | sizeof(struct f2fs_private_dio), GFP_NOFS); | |
8e114038 | 2746 | if (!dio) |
02b16d0a | 2747 | goto out; |
02b16d0a CY |
2748 | |
2749 | dio->inode = inode; | |
2750 | dio->orig_end_io = bio->bi_end_io; | |
2751 | dio->orig_private = bio->bi_private; | |
2752 | dio->write = write; | |
2753 | ||
2754 | bio->bi_end_io = f2fs_dio_end_io; | |
2755 | bio->bi_private = dio; | |
2756 | ||
2757 | inc_page_count(F2FS_I_SB(inode), | |
2758 | write ? F2FS_DIO_WRITE : F2FS_DIO_READ); | |
2759 | ||
2760 | submit_bio(bio); | |
2761 | return; | |
2762 | out: | |
2763 | bio->bi_status = BLK_STS_IOERR; | |
2764 | bio_endio(bio); | |
2765 | } | |
2766 | ||
c8b8e32d | 2767 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 2768 | { |
b439b103 | 2769 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 | 2770 | struct inode *inode = mapping->host; |
0cdd3195 | 2771 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
f847c699 | 2772 | struct f2fs_inode_info *fi = F2FS_I(inode); |
3aab8f82 | 2773 | size_t count = iov_iter_count(iter); |
c8b8e32d | 2774 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 2775 | int rw = iov_iter_rw(iter); |
3aab8f82 | 2776 | int err; |
0cdd3195 | 2777 | enum rw_hint hint = iocb->ki_hint; |
63189b78 | 2778 | int whint_mode = F2FS_OPTION(sbi).whint_mode; |
f847c699 | 2779 | bool do_opu; |
944fcfc1 | 2780 | |
b439b103 | 2781 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 | 2782 | if (err) |
8a56dd96 | 2783 | return err < 0 ? err : 0; |
9ffe0fb5 | 2784 | |
f847c699 | 2785 | if (f2fs_force_buffered_io(inode, iocb, iter)) |
36abef4e | 2786 | return 0; |
fcc85a4d | 2787 | |
f847c699 CY |
2788 | do_opu = allow_outplace_dio(inode, iocb, iter); |
2789 | ||
5302fb00 | 2790 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 2791 | |
0cdd3195 HL |
2792 | if (rw == WRITE && whint_mode == WHINT_MODE_OFF) |
2793 | iocb->ki_hint = WRITE_LIFE_NOT_SET; | |
2794 | ||
f847c699 CY |
2795 | if (iocb->ki_flags & IOCB_NOWAIT) { |
2796 | if (!down_read_trylock(&fi->i_gc_rwsem[rw])) { | |
2797 | iocb->ki_hint = hint; | |
2798 | err = -EAGAIN; | |
2799 | goto out; | |
2800 | } | |
2801 | if (do_opu && !down_read_trylock(&fi->i_gc_rwsem[READ])) { | |
2802 | up_read(&fi->i_gc_rwsem[rw]); | |
b91050a8 HL |
2803 | iocb->ki_hint = hint; |
2804 | err = -EAGAIN; | |
2805 | goto out; | |
2806 | } | |
f847c699 CY |
2807 | } else { |
2808 | down_read(&fi->i_gc_rwsem[rw]); | |
2809 | if (do_opu) | |
2810 | down_read(&fi->i_gc_rwsem[READ]); | |
b91050a8 HL |
2811 | } |
2812 | ||
02b16d0a | 2813 | err = __blockdev_direct_IO(iocb, inode, inode->i_sb->s_bdev, |
f9d6d059 CY |
2814 | iter, rw == WRITE ? get_data_block_dio_write : |
2815 | get_data_block_dio, NULL, f2fs_dio_submit_bio, | |
02b16d0a | 2816 | DIO_LOCKING | DIO_SKIP_HOLES); |
f847c699 CY |
2817 | |
2818 | if (do_opu) | |
2819 | up_read(&fi->i_gc_rwsem[READ]); | |
2820 | ||
2821 | up_read(&fi->i_gc_rwsem[rw]); | |
82e0a5aa CY |
2822 | |
2823 | if (rw == WRITE) { | |
0cdd3195 HL |
2824 | if (whint_mode == WHINT_MODE_OFF) |
2825 | iocb->ki_hint = hint; | |
b0af6d49 CY |
2826 | if (err > 0) { |
2827 | f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO, | |
2828 | err); | |
f847c699 CY |
2829 | if (!do_opu) |
2830 | set_inode_flag(inode, FI_UPDATE_WRITE); | |
b0af6d49 | 2831 | } else if (err < 0) { |
6bfc4919 | 2832 | f2fs_write_failed(mapping, offset + count); |
b0af6d49 | 2833 | } |
6bfc4919 | 2834 | } |
70407fad | 2835 | |
b91050a8 | 2836 | out: |
5302fb00 | 2837 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 2838 | |
3aab8f82 | 2839 | return err; |
eb47b800 JK |
2840 | } |
2841 | ||
487261f3 CY |
2842 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
2843 | unsigned int length) | |
eb47b800 JK |
2844 | { |
2845 | struct inode *inode = page->mapping->host; | |
487261f3 | 2846 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 2847 | |
487261f3 | 2848 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 2849 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
2850 | return; |
2851 | ||
487261f3 | 2852 | if (PageDirty(page)) { |
933439c8 | 2853 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 2854 | dec_page_count(sbi, F2FS_DIRTY_META); |
933439c8 | 2855 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 2856 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
933439c8 | 2857 | } else { |
487261f3 | 2858 | inode_dec_dirty_pages(inode); |
4d57b86d | 2859 | f2fs_remove_dirty_inode(inode); |
933439c8 | 2860 | } |
487261f3 | 2861 | } |
decd36b6 | 2862 | |
2baf0781 CY |
2863 | clear_cold_data(page); |
2864 | ||
decd36b6 | 2865 | if (IS_ATOMIC_WRITTEN_PAGE(page)) |
4d57b86d | 2866 | return f2fs_drop_inmem_page(inode, page); |
decd36b6 | 2867 | |
240a5915 | 2868 | f2fs_clear_page_private(page); |
eb47b800 JK |
2869 | } |
2870 | ||
487261f3 | 2871 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 2872 | { |
f68daeeb JK |
2873 | /* If this is dirty page, keep PagePrivate */ |
2874 | if (PageDirty(page)) | |
2875 | return 0; | |
2876 | ||
decd36b6 CY |
2877 | /* This is atomic written page, keep Private */ |
2878 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
2879 | return 0; | |
2880 | ||
2baf0781 | 2881 | clear_cold_data(page); |
240a5915 | 2882 | f2fs_clear_page_private(page); |
c3850aa1 | 2883 | return 1; |
eb47b800 JK |
2884 | } |
2885 | ||
2886 | static int f2fs_set_data_page_dirty(struct page *page) | |
2887 | { | |
4969c06a | 2888 | struct inode *inode = page_file_mapping(page)->host; |
eb47b800 | 2889 | |
26c6b887 JK |
2890 | trace_f2fs_set_page_dirty(page, DATA); |
2891 | ||
237c0790 JK |
2892 | if (!PageUptodate(page)) |
2893 | SetPageUptodate(page); | |
4969c06a JK |
2894 | if (PageSwapCache(page)) |
2895 | return __set_page_dirty_nobuffers(page); | |
34ba94ba | 2896 | |
5fe45743 | 2897 | if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) { |
decd36b6 | 2898 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
4d57b86d | 2899 | f2fs_register_inmem_page(inode, page); |
decd36b6 CY |
2900 | return 1; |
2901 | } | |
2902 | /* | |
2903 | * Previously, this page has been registered, we just | |
2904 | * return here. | |
2905 | */ | |
2906 | return 0; | |
34ba94ba JK |
2907 | } |
2908 | ||
eb47b800 | 2909 | if (!PageDirty(page)) { |
b87078ad | 2910 | __set_page_dirty_nobuffers(page); |
4d57b86d | 2911 | f2fs_update_dirty_page(inode, page); |
eb47b800 JK |
2912 | return 1; |
2913 | } | |
2914 | return 0; | |
2915 | } | |
2916 | ||
c01e54b7 JK |
2917 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
2918 | { | |
454ae7e5 CY |
2919 | struct inode *inode = mapping->host; |
2920 | ||
1d373a0e JK |
2921 | if (f2fs_has_inline_data(inode)) |
2922 | return 0; | |
2923 | ||
2924 | /* make sure allocating whole blocks */ | |
2925 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
2926 | filemap_write_and_wait(mapping); | |
2927 | ||
e2b4e2bc | 2928 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
2929 | } |
2930 | ||
5b7a487c WG |
2931 | #ifdef CONFIG_MIGRATION |
2932 | #include <linux/migrate.h> | |
2933 | ||
2934 | int f2fs_migrate_page(struct address_space *mapping, | |
2935 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
2936 | { | |
2937 | int rc, extra_count; | |
2938 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
2939 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
2940 | ||
2941 | BUG_ON(PageWriteback(page)); | |
2942 | ||
2943 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
ff1048e7 JK |
2944 | if (atomic_written) { |
2945 | if (mode != MIGRATE_SYNC) | |
2946 | return -EBUSY; | |
2947 | if (!mutex_trylock(&fi->inmem_lock)) | |
2948 | return -EAGAIN; | |
2949 | } | |
5b7a487c | 2950 | |
240a5915 CY |
2951 | /* one extra reference was held for atomic_write page */ |
2952 | extra_count = atomic_written ? 1 : 0; | |
5b7a487c | 2953 | rc = migrate_page_move_mapping(mapping, newpage, |
37109694 | 2954 | page, extra_count); |
5b7a487c WG |
2955 | if (rc != MIGRATEPAGE_SUCCESS) { |
2956 | if (atomic_written) | |
2957 | mutex_unlock(&fi->inmem_lock); | |
2958 | return rc; | |
2959 | } | |
2960 | ||
2961 | if (atomic_written) { | |
2962 | struct inmem_pages *cur; | |
2963 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
2964 | if (cur->page == page) { | |
2965 | cur->page = newpage; | |
2966 | break; | |
2967 | } | |
2968 | mutex_unlock(&fi->inmem_lock); | |
2969 | put_page(page); | |
2970 | get_page(newpage); | |
2971 | } | |
2972 | ||
240a5915 CY |
2973 | if (PagePrivate(page)) { |
2974 | f2fs_set_page_private(newpage, page_private(page)); | |
2975 | f2fs_clear_page_private(page); | |
2976 | } | |
5b7a487c | 2977 | |
2916ecc0 JG |
2978 | if (mode != MIGRATE_SYNC_NO_COPY) |
2979 | migrate_page_copy(newpage, page); | |
2980 | else | |
2981 | migrate_page_states(newpage, page); | |
5b7a487c WG |
2982 | |
2983 | return MIGRATEPAGE_SUCCESS; | |
2984 | } | |
2985 | #endif | |
2986 | ||
4969c06a JK |
2987 | #ifdef CONFIG_SWAP |
2988 | /* Copied from generic_swapfile_activate() to check any holes */ | |
2989 | static int check_swap_activate(struct file *swap_file, unsigned int max) | |
2990 | { | |
2991 | struct address_space *mapping = swap_file->f_mapping; | |
2992 | struct inode *inode = mapping->host; | |
2993 | unsigned blocks_per_page; | |
2994 | unsigned long page_no; | |
2995 | unsigned blkbits; | |
2996 | sector_t probe_block; | |
2997 | sector_t last_block; | |
2998 | sector_t lowest_block = -1; | |
2999 | sector_t highest_block = 0; | |
3000 | ||
3001 | blkbits = inode->i_blkbits; | |
3002 | blocks_per_page = PAGE_SIZE >> blkbits; | |
3003 | ||
3004 | /* | |
3005 | * Map all the blocks into the extent list. This code doesn't try | |
3006 | * to be very smart. | |
3007 | */ | |
3008 | probe_block = 0; | |
3009 | page_no = 0; | |
3010 | last_block = i_size_read(inode) >> blkbits; | |
3011 | while ((probe_block + blocks_per_page) <= last_block && page_no < max) { | |
3012 | unsigned block_in_page; | |
3013 | sector_t first_block; | |
3014 | ||
3015 | cond_resched(); | |
3016 | ||
3017 | first_block = bmap(inode, probe_block); | |
3018 | if (first_block == 0) | |
3019 | goto bad_bmap; | |
3020 | ||
3021 | /* | |
3022 | * It must be PAGE_SIZE aligned on-disk | |
3023 | */ | |
3024 | if (first_block & (blocks_per_page - 1)) { | |
3025 | probe_block++; | |
3026 | goto reprobe; | |
3027 | } | |
3028 | ||
3029 | for (block_in_page = 1; block_in_page < blocks_per_page; | |
3030 | block_in_page++) { | |
3031 | sector_t block; | |
3032 | ||
3033 | block = bmap(inode, probe_block + block_in_page); | |
3034 | if (block == 0) | |
3035 | goto bad_bmap; | |
3036 | if (block != first_block + block_in_page) { | |
3037 | /* Discontiguity */ | |
3038 | probe_block++; | |
3039 | goto reprobe; | |
3040 | } | |
3041 | } | |
3042 | ||
3043 | first_block >>= (PAGE_SHIFT - blkbits); | |
3044 | if (page_no) { /* exclude the header page */ | |
3045 | if (first_block < lowest_block) | |
3046 | lowest_block = first_block; | |
3047 | if (first_block > highest_block) | |
3048 | highest_block = first_block; | |
3049 | } | |
3050 | ||
3051 | page_no++; | |
3052 | probe_block += blocks_per_page; | |
3053 | reprobe: | |
3054 | continue; | |
3055 | } | |
3056 | return 0; | |
3057 | ||
3058 | bad_bmap: | |
3059 | pr_err("swapon: swapfile has holes\n"); | |
3060 | return -EINVAL; | |
3061 | } | |
3062 | ||
3063 | static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file, | |
3064 | sector_t *span) | |
3065 | { | |
3066 | struct inode *inode = file_inode(file); | |
3067 | int ret; | |
3068 | ||
3069 | if (!S_ISREG(inode->i_mode)) | |
3070 | return -EINVAL; | |
3071 | ||
3072 | if (f2fs_readonly(F2FS_I_SB(inode)->sb)) | |
3073 | return -EROFS; | |
3074 | ||
3075 | ret = f2fs_convert_inline_inode(inode); | |
3076 | if (ret) | |
3077 | return ret; | |
3078 | ||
3079 | ret = check_swap_activate(file, sis->max); | |
3080 | if (ret) | |
3081 | return ret; | |
3082 | ||
3083 | set_inode_flag(inode, FI_PIN_FILE); | |
3084 | f2fs_precache_extents(inode); | |
3085 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); | |
3086 | return 0; | |
3087 | } | |
3088 | ||
3089 | static void f2fs_swap_deactivate(struct file *file) | |
3090 | { | |
3091 | struct inode *inode = file_inode(file); | |
3092 | ||
3093 | clear_inode_flag(inode, FI_PIN_FILE); | |
3094 | } | |
3095 | #else | |
3096 | static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file, | |
3097 | sector_t *span) | |
3098 | { | |
3099 | return -EOPNOTSUPP; | |
3100 | } | |
3101 | ||
3102 | static void f2fs_swap_deactivate(struct file *file) | |
3103 | { | |
3104 | } | |
3105 | #endif | |
3106 | ||
eb47b800 JK |
3107 | const struct address_space_operations f2fs_dblock_aops = { |
3108 | .readpage = f2fs_read_data_page, | |
3109 | .readpages = f2fs_read_data_pages, | |
3110 | .writepage = f2fs_write_data_page, | |
3111 | .writepages = f2fs_write_data_pages, | |
3112 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 3113 | .write_end = f2fs_write_end, |
eb47b800 | 3114 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
3115 | .invalidatepage = f2fs_invalidate_page, |
3116 | .releasepage = f2fs_release_page, | |
eb47b800 | 3117 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 3118 | .bmap = f2fs_bmap, |
4969c06a JK |
3119 | .swap_activate = f2fs_swap_activate, |
3120 | .swap_deactivate = f2fs_swap_deactivate, | |
5b7a487c WG |
3121 | #ifdef CONFIG_MIGRATION |
3122 | .migratepage = f2fs_migrate_page, | |
3123 | #endif | |
eb47b800 | 3124 | }; |
6dbb1796 | 3125 | |
5ec2d99d | 3126 | void f2fs_clear_page_cache_dirty_tag(struct page *page) |
aec2f729 CY |
3127 | { |
3128 | struct address_space *mapping = page_mapping(page); | |
3129 | unsigned long flags; | |
3130 | ||
3131 | xa_lock_irqsave(&mapping->i_pages, flags); | |
5ec2d99d | 3132 | __xa_clear_mark(&mapping->i_pages, page_index(page), |
aec2f729 CY |
3133 | PAGECACHE_TAG_DIRTY); |
3134 | xa_unlock_irqrestore(&mapping->i_pages, flags); | |
3135 | } | |
3136 | ||
6dbb1796 EB |
3137 | int __init f2fs_init_post_read_processing(void) |
3138 | { | |
3139 | bio_post_read_ctx_cache = KMEM_CACHE(bio_post_read_ctx, 0); | |
3140 | if (!bio_post_read_ctx_cache) | |
3141 | goto fail; | |
3142 | bio_post_read_ctx_pool = | |
3143 | mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS, | |
3144 | bio_post_read_ctx_cache); | |
3145 | if (!bio_post_read_ctx_pool) | |
3146 | goto fail_free_cache; | |
3147 | return 0; | |
3148 | ||
3149 | fail_free_cache: | |
3150 | kmem_cache_destroy(bio_post_read_ctx_cache); | |
3151 | fail: | |
3152 | return -ENOMEM; | |
3153 | } | |
3154 | ||
3155 | void __exit f2fs_destroy_post_read_processing(void) | |
3156 | { | |
3157 | mempool_destroy(bio_post_read_ctx_pool); | |
3158 | kmem_cache_destroy(bio_post_read_ctx_cache); | |
3159 | } |