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Commit | Line | Data |
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0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
f1e88660 | 22 | #include <linux/cleancache.h> |
174cd4b1 | 23 | #include <linux/sched/signal.h> |
eb47b800 JK |
24 | |
25 | #include "f2fs.h" | |
26 | #include "node.h" | |
27 | #include "segment.h" | |
db9f7c1a | 28 | #include "trace.h" |
848753aa | 29 | #include <trace/events/f2fs.h> |
eb47b800 | 30 | |
6dbb1796 EB |
31 | #define NUM_PREALLOC_POST_READ_CTXS 128 |
32 | ||
33 | static struct kmem_cache *bio_post_read_ctx_cache; | |
34 | static mempool_t *bio_post_read_ctx_pool; | |
35 | ||
36951b38 CY |
36 | static bool __is_cp_guaranteed(struct page *page) |
37 | { | |
38 | struct address_space *mapping = page->mapping; | |
39 | struct inode *inode; | |
40 | struct f2fs_sb_info *sbi; | |
41 | ||
42 | if (!mapping) | |
43 | return false; | |
44 | ||
45 | inode = mapping->host; | |
46 | sbi = F2FS_I_SB(inode); | |
47 | ||
48 | if (inode->i_ino == F2FS_META_INO(sbi) || | |
49 | inode->i_ino == F2FS_NODE_INO(sbi) || | |
50 | S_ISDIR(inode->i_mode) || | |
e7a4feb0 CY |
51 | (S_ISREG(inode->i_mode) && |
52 | is_inode_flag_set(inode, FI_ATOMIC_FILE)) || | |
36951b38 CY |
53 | is_cold_data(page)) |
54 | return true; | |
55 | return false; | |
56 | } | |
57 | ||
6dbb1796 EB |
58 | /* postprocessing steps for read bios */ |
59 | enum bio_post_read_step { | |
60 | STEP_INITIAL = 0, | |
61 | STEP_DECRYPT, | |
62 | }; | |
63 | ||
64 | struct bio_post_read_ctx { | |
65 | struct bio *bio; | |
66 | struct work_struct work; | |
67 | unsigned int cur_step; | |
68 | unsigned int enabled_steps; | |
69 | }; | |
70 | ||
71 | static void __read_end_io(struct bio *bio) | |
93dfe2ac | 72 | { |
6dbb1796 EB |
73 | struct page *page; |
74 | struct bio_vec *bv; | |
f568849e | 75 | int i; |
93dfe2ac | 76 | |
6dbb1796 EB |
77 | bio_for_each_segment_all(bv, bio, i) { |
78 | page = bv->bv_page; | |
79 | ||
80 | /* PG_error was set if any post_read step failed */ | |
81 | if (bio->bi_status || PageError(page)) { | |
82 | ClearPageUptodate(page); | |
83 | SetPageError(page); | |
84 | } else { | |
85 | SetPageUptodate(page); | |
86 | } | |
87 | unlock_page(page); | |
88 | } | |
89 | if (bio->bi_private) | |
90 | mempool_free(bio->bi_private, bio_post_read_ctx_pool); | |
91 | bio_put(bio); | |
92 | } | |
93 | ||
94 | static void bio_post_read_processing(struct bio_post_read_ctx *ctx); | |
95 | ||
96 | static void decrypt_work(struct work_struct *work) | |
97 | { | |
98 | struct bio_post_read_ctx *ctx = | |
99 | container_of(work, struct bio_post_read_ctx, work); | |
100 | ||
101 | fscrypt_decrypt_bio(ctx->bio); | |
102 | ||
103 | bio_post_read_processing(ctx); | |
104 | } | |
105 | ||
106 | static void bio_post_read_processing(struct bio_post_read_ctx *ctx) | |
107 | { | |
108 | switch (++ctx->cur_step) { | |
109 | case STEP_DECRYPT: | |
110 | if (ctx->enabled_steps & (1 << STEP_DECRYPT)) { | |
111 | INIT_WORK(&ctx->work, decrypt_work); | |
112 | fscrypt_enqueue_decrypt_work(&ctx->work); | |
113 | return; | |
114 | } | |
115 | ctx->cur_step++; | |
116 | /* fall-through */ | |
117 | default: | |
118 | __read_end_io(ctx->bio); | |
119 | } | |
120 | } | |
121 | ||
122 | static bool f2fs_bio_post_read_required(struct bio *bio) | |
123 | { | |
124 | return bio->bi_private && !bio->bi_status; | |
125 | } | |
126 | ||
127 | static void f2fs_read_end_io(struct bio *bio) | |
128 | { | |
8b038c70 | 129 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
263663cd | 130 | if (time_to_inject(F2FS_P_SB(bio_first_page_all(bio)), FAULT_IO)) { |
55523519 | 131 | f2fs_show_injection_info(FAULT_IO); |
4e4cbee9 | 132 | bio->bi_status = BLK_STS_IOERR; |
55523519 | 133 | } |
8b038c70 CY |
134 | #endif |
135 | ||
6dbb1796 EB |
136 | if (f2fs_bio_post_read_required(bio)) { |
137 | struct bio_post_read_ctx *ctx = bio->bi_private; | |
f1e88660 | 138 | |
6dbb1796 EB |
139 | ctx->cur_step = STEP_INITIAL; |
140 | bio_post_read_processing(ctx); | |
141 | return; | |
f1e88660 | 142 | } |
6dbb1796 EB |
143 | |
144 | __read_end_io(bio); | |
f1e88660 JK |
145 | } |
146 | ||
4246a0b6 | 147 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 148 | { |
1b1f559f | 149 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
150 | struct bio_vec *bvec; |
151 | int i; | |
93dfe2ac | 152 | |
f568849e | 153 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac | 154 | struct page *page = bvec->bv_page; |
36951b38 | 155 | enum count_type type = WB_DATA_TYPE(page); |
93dfe2ac | 156 | |
0a595eba JK |
157 | if (IS_DUMMY_WRITTEN_PAGE(page)) { |
158 | set_page_private(page, (unsigned long)NULL); | |
159 | ClearPagePrivate(page); | |
160 | unlock_page(page); | |
161 | mempool_free(page, sbi->write_io_dummy); | |
162 | ||
4e4cbee9 | 163 | if (unlikely(bio->bi_status)) |
0a595eba JK |
164 | f2fs_stop_checkpoint(sbi, true); |
165 | continue; | |
166 | } | |
167 | ||
0b81d077 | 168 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 169 | |
4e4cbee9 | 170 | if (unlikely(bio->bi_status)) { |
5114a97a | 171 | mapping_set_error(page->mapping, -EIO); |
b1ca321d JK |
172 | if (type == F2FS_WB_CP_DATA) |
173 | f2fs_stop_checkpoint(sbi, true); | |
93dfe2ac | 174 | } |
7dff55d2 YH |
175 | |
176 | f2fs_bug_on(sbi, page->mapping == NODE_MAPPING(sbi) && | |
177 | page->index != nid_of_node(page)); | |
178 | ||
36951b38 CY |
179 | dec_page_count(sbi, type); |
180 | clear_cold_data(page); | |
93dfe2ac | 181 | end_page_writeback(page); |
f568849e | 182 | } |
36951b38 | 183 | if (!get_pages(sbi, F2FS_WB_CP_DATA) && |
f5730184 | 184 | wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
185 | wake_up(&sbi->cp_wait); |
186 | ||
187 | bio_put(bio); | |
188 | } | |
189 | ||
3c62be17 JK |
190 | /* |
191 | * Return true, if pre_bio's bdev is same as its target device. | |
192 | */ | |
193 | struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, | |
194 | block_t blk_addr, struct bio *bio) | |
195 | { | |
196 | struct block_device *bdev = sbi->sb->s_bdev; | |
197 | int i; | |
198 | ||
199 | for (i = 0; i < sbi->s_ndevs; i++) { | |
200 | if (FDEV(i).start_blk <= blk_addr && | |
201 | FDEV(i).end_blk >= blk_addr) { | |
202 | blk_addr -= FDEV(i).start_blk; | |
203 | bdev = FDEV(i).bdev; | |
204 | break; | |
205 | } | |
206 | } | |
207 | if (bio) { | |
74d46992 | 208 | bio_set_dev(bio, bdev); |
3c62be17 JK |
209 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
210 | } | |
211 | return bdev; | |
212 | } | |
213 | ||
214 | int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) | |
215 | { | |
216 | int i; | |
217 | ||
218 | for (i = 0; i < sbi->s_ndevs; i++) | |
219 | if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) | |
220 | return i; | |
221 | return 0; | |
222 | } | |
223 | ||
224 | static bool __same_bdev(struct f2fs_sb_info *sbi, | |
225 | block_t blk_addr, struct bio *bio) | |
226 | { | |
74d46992 CH |
227 | struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL); |
228 | return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno; | |
3c62be17 JK |
229 | } |
230 | ||
940a6d34 GZ |
231 | /* |
232 | * Low-level block read/write IO operations. | |
233 | */ | |
234 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
578c6478 | 235 | struct writeback_control *wbc, |
0cdd3195 HL |
236 | int npages, bool is_read, |
237 | enum page_type type, enum temp_type temp) | |
940a6d34 GZ |
238 | { |
239 | struct bio *bio; | |
240 | ||
d62fe971 | 241 | bio = f2fs_bio_alloc(sbi, npages, true); |
940a6d34 | 242 | |
3c62be17 | 243 | f2fs_target_device(sbi, blk_addr, bio); |
0cdd3195 HL |
244 | if (is_read) { |
245 | bio->bi_end_io = f2fs_read_end_io; | |
246 | bio->bi_private = NULL; | |
247 | } else { | |
248 | bio->bi_end_io = f2fs_write_end_io; | |
249 | bio->bi_private = sbi; | |
4d57b86d | 250 | bio->bi_write_hint = f2fs_io_type_to_rw_hint(sbi, type, temp); |
0cdd3195 | 251 | } |
578c6478 YY |
252 | if (wbc) |
253 | wbc_init_bio(wbc, bio); | |
940a6d34 GZ |
254 | |
255 | return bio; | |
256 | } | |
257 | ||
4fc29c1a LT |
258 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
259 | struct bio *bio, enum page_type type) | |
f5730184 | 260 | { |
4fc29c1a | 261 | if (!is_read_io(bio_op(bio))) { |
0a595eba JK |
262 | unsigned int start; |
263 | ||
0a595eba JK |
264 | if (type != DATA && type != NODE) |
265 | goto submit_io; | |
266 | ||
ccd31cb2 | 267 | if (f2fs_sb_has_blkzoned(sbi->sb) && current->plug) |
3bb09a0e TY |
268 | blk_finish_plug(current->plug); |
269 | ||
0a595eba JK |
270 | start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS; |
271 | start %= F2FS_IO_SIZE(sbi); | |
272 | ||
273 | if (start == 0) | |
274 | goto submit_io; | |
275 | ||
276 | /* fill dummy pages */ | |
277 | for (; start < F2FS_IO_SIZE(sbi); start++) { | |
278 | struct page *page = | |
279 | mempool_alloc(sbi->write_io_dummy, | |
280 | GFP_NOIO | __GFP_ZERO | __GFP_NOFAIL); | |
281 | f2fs_bug_on(sbi, !page); | |
282 | ||
283 | SetPagePrivate(page); | |
284 | set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE); | |
285 | lock_page(page); | |
286 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) | |
287 | f2fs_bug_on(sbi, 1); | |
288 | } | |
289 | /* | |
290 | * In the NODE case, we lose next block address chain. So, we | |
291 | * need to do checkpoint in f2fs_sync_file. | |
292 | */ | |
293 | if (type == NODE) | |
294 | set_sbi_flag(sbi, SBI_NEED_CP); | |
19a5f5e2 | 295 | } |
0a595eba | 296 | submit_io: |
554b5125 JK |
297 | if (is_read_io(bio_op(bio))) |
298 | trace_f2fs_submit_read_bio(sbi->sb, type, bio); | |
299 | else | |
300 | trace_f2fs_submit_write_bio(sbi->sb, type, bio); | |
4e49ea4a | 301 | submit_bio(bio); |
f5730184 JK |
302 | } |
303 | ||
458e6197 | 304 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 305 | { |
458e6197 | 306 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
307 | |
308 | if (!io->bio) | |
309 | return; | |
310 | ||
554b5125 JK |
311 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
312 | ||
04d328de | 313 | if (is_read_io(fio->op)) |
554b5125 | 314 | trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio); |
6a8f8ca5 | 315 | else |
554b5125 | 316 | trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio); |
04d328de | 317 | |
4fc29c1a | 318 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
319 | io->bio = NULL; |
320 | } | |
321 | ||
942fd319 JK |
322 | static bool __has_merged_page(struct f2fs_bio_info *io, |
323 | struct inode *inode, nid_t ino, pgoff_t idx) | |
0fd785eb | 324 | { |
0fd785eb CY |
325 | struct bio_vec *bvec; |
326 | struct page *target; | |
327 | int i; | |
328 | ||
0c3a5797 | 329 | if (!io->bio) |
0fd785eb | 330 | return false; |
0c3a5797 | 331 | |
942fd319 | 332 | if (!inode && !ino) |
0c3a5797 | 333 | return true; |
0fd785eb CY |
334 | |
335 | bio_for_each_segment_all(bvec, io->bio, i) { | |
336 | ||
0b81d077 | 337 | if (bvec->bv_page->mapping) |
0fd785eb | 338 | target = bvec->bv_page; |
0b81d077 JK |
339 | else |
340 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 341 | |
942fd319 JK |
342 | if (idx != target->index) |
343 | continue; | |
344 | ||
0c3a5797 CY |
345 | if (inode && inode == target->mapping->host) |
346 | return true; | |
0c3a5797 | 347 | if (ino && ino == ino_of_node(target)) |
0fd785eb | 348 | return true; |
0fd785eb CY |
349 | } |
350 | ||
0fd785eb CY |
351 | return false; |
352 | } | |
353 | ||
0c3a5797 | 354 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
942fd319 | 355 | nid_t ino, pgoff_t idx, enum page_type type) |
0c3a5797 CY |
356 | { |
357 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
a912b54d JK |
358 | enum temp_type temp; |
359 | struct f2fs_bio_info *io; | |
360 | bool ret = false; | |
0c3a5797 | 361 | |
a912b54d JK |
362 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { |
363 | io = sbi->write_io[btype] + temp; | |
364 | ||
365 | down_read(&io->io_rwsem); | |
366 | ret = __has_merged_page(io, inode, ino, idx); | |
367 | up_read(&io->io_rwsem); | |
0c3a5797 | 368 | |
a912b54d JK |
369 | /* TODO: use HOT temp only for meta pages now. */ |
370 | if (ret || btype == META) | |
371 | break; | |
372 | } | |
0c3a5797 CY |
373 | return ret; |
374 | } | |
375 | ||
b9109b0e | 376 | static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi, |
a912b54d | 377 | enum page_type type, enum temp_type temp) |
93dfe2ac JK |
378 | { |
379 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
a912b54d | 380 | struct f2fs_bio_info *io = sbi->write_io[btype] + temp; |
93dfe2ac | 381 | |
df0f8dc0 | 382 | down_write(&io->io_rwsem); |
458e6197 JK |
383 | |
384 | /* change META to META_FLUSH in the checkpoint procedure */ | |
385 | if (type >= META_FLUSH) { | |
386 | io->fio.type = META_FLUSH; | |
04d328de | 387 | io->fio.op = REQ_OP_WRITE; |
3adc5fcb | 388 | io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC; |
70fd7614 | 389 | if (!test_opt(sbi, NOBARRIER)) |
7f54f51f | 390 | io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA; |
458e6197 JK |
391 | } |
392 | __submit_merged_bio(io); | |
df0f8dc0 | 393 | up_write(&io->io_rwsem); |
93dfe2ac JK |
394 | } |
395 | ||
a912b54d JK |
396 | static void __submit_merged_write_cond(struct f2fs_sb_info *sbi, |
397 | struct inode *inode, nid_t ino, pgoff_t idx, | |
398 | enum page_type type, bool force) | |
0c3a5797 | 399 | { |
a912b54d JK |
400 | enum temp_type temp; |
401 | ||
402 | if (!force && !has_merged_page(sbi, inode, ino, idx, type)) | |
403 | return; | |
404 | ||
405 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { | |
406 | ||
407 | __f2fs_submit_merged_write(sbi, type, temp); | |
408 | ||
409 | /* TODO: use HOT temp only for meta pages now. */ | |
410 | if (type >= META) | |
411 | break; | |
412 | } | |
0c3a5797 CY |
413 | } |
414 | ||
b9109b0e | 415 | void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type) |
0c3a5797 | 416 | { |
a912b54d | 417 | __submit_merged_write_cond(sbi, NULL, 0, 0, type, true); |
0c3a5797 CY |
418 | } |
419 | ||
b9109b0e | 420 | void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi, |
942fd319 | 421 | struct inode *inode, nid_t ino, pgoff_t idx, |
b9109b0e | 422 | enum page_type type) |
0c3a5797 | 423 | { |
a912b54d | 424 | __submit_merged_write_cond(sbi, inode, ino, idx, type, false); |
0c3a5797 CY |
425 | } |
426 | ||
b9109b0e | 427 | void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi) |
406657dd | 428 | { |
b9109b0e JK |
429 | f2fs_submit_merged_write(sbi, DATA); |
430 | f2fs_submit_merged_write(sbi, NODE); | |
431 | f2fs_submit_merged_write(sbi, META); | |
406657dd CY |
432 | } |
433 | ||
93dfe2ac JK |
434 | /* |
435 | * Fill the locked page with data located in the block address. | |
771a9a71 | 436 | * A caller needs to unlock the page on failure. |
93dfe2ac | 437 | */ |
05ca3632 | 438 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 439 | { |
93dfe2ac | 440 | struct bio *bio; |
0b81d077 JK |
441 | struct page *page = fio->encrypted_page ? |
442 | fio->encrypted_page : fio->page; | |
93dfe2ac | 443 | |
0833721e | 444 | verify_block_addr(fio, fio->new_blkaddr); |
2ace38e0 | 445 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 446 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
447 | |
448 | /* Allocate a new bio */ | |
578c6478 | 449 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc, |
0cdd3195 | 450 | 1, is_read_io(fio->op), fio->type, fio->temp); |
93dfe2ac | 451 | |
09cbfeaf | 452 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 453 | bio_put(bio); |
93dfe2ac JK |
454 | return -EFAULT; |
455 | } | |
04d328de | 456 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 457 | |
4fc29c1a | 458 | __submit_bio(fio->sbi, bio, fio->type); |
d1b3e72d JK |
459 | |
460 | if (!is_read_io(fio->op)) | |
461 | inc_page_count(fio->sbi, WB_DATA_TYPE(fio->page)); | |
93dfe2ac JK |
462 | return 0; |
463 | } | |
464 | ||
fe16efe6 | 465 | void f2fs_submit_page_write(struct f2fs_io_info *fio) |
93dfe2ac | 466 | { |
05ca3632 | 467 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 468 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
a912b54d | 469 | struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp; |
4375a336 | 470 | struct page *bio_page; |
93dfe2ac | 471 | |
b9109b0e | 472 | f2fs_bug_on(sbi, is_read_io(fio->op)); |
93dfe2ac | 473 | |
fb830fc5 CY |
474 | down_write(&io->io_rwsem); |
475 | next: | |
476 | if (fio->in_list) { | |
477 | spin_lock(&io->io_lock); | |
478 | if (list_empty(&io->io_list)) { | |
479 | spin_unlock(&io->io_lock); | |
fe16efe6 | 480 | goto out; |
fb830fc5 CY |
481 | } |
482 | fio = list_first_entry(&io->io_list, | |
483 | struct f2fs_io_info, list); | |
484 | list_del(&fio->list); | |
485 | spin_unlock(&io->io_lock); | |
486 | } | |
93dfe2ac | 487 | |
7b525dd0 | 488 | if (is_valid_blkaddr(fio->old_blkaddr)) |
0833721e YH |
489 | verify_block_addr(fio, fio->old_blkaddr); |
490 | verify_block_addr(fio, fio->new_blkaddr); | |
93dfe2ac | 491 | |
36951b38 CY |
492 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
493 | ||
ebf7c522 TM |
494 | /* set submitted = true as a return value */ |
495 | fio->submitted = true; | |
d68f735b | 496 | |
b9109b0e | 497 | inc_page_count(sbi, WB_DATA_TYPE(bio_page)); |
93dfe2ac | 498 | |
7a9d7548 | 499 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
3c62be17 JK |
500 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) || |
501 | !__same_bdev(sbi, fio->new_blkaddr, io->bio))) | |
458e6197 | 502 | __submit_merged_bio(io); |
93dfe2ac JK |
503 | alloc_new: |
504 | if (io->bio == NULL) { | |
0a595eba JK |
505 | if ((fio->type == DATA || fio->type == NODE) && |
506 | fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) { | |
b9109b0e | 507 | dec_page_count(sbi, WB_DATA_TYPE(bio_page)); |
fe16efe6 CY |
508 | fio->retry = true; |
509 | goto skip; | |
0a595eba | 510 | } |
578c6478 | 511 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, fio->io_wbc, |
0cdd3195 HL |
512 | BIO_MAX_PAGES, false, |
513 | fio->type, fio->temp); | |
458e6197 | 514 | io->fio = *fio; |
93dfe2ac JK |
515 | } |
516 | ||
a912b54d | 517 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) { |
458e6197 | 518 | __submit_merged_bio(io); |
93dfe2ac JK |
519 | goto alloc_new; |
520 | } | |
521 | ||
578c6478 YY |
522 | if (fio->io_wbc) |
523 | wbc_account_io(fio->io_wbc, bio_page, PAGE_SIZE); | |
524 | ||
7a9d7548 | 525 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 526 | f2fs_trace_ios(fio, 0); |
fb830fc5 CY |
527 | |
528 | trace_f2fs_submit_page_write(fio->page, fio); | |
fe16efe6 | 529 | skip: |
fb830fc5 CY |
530 | if (fio->in_list) |
531 | goto next; | |
fe16efe6 | 532 | out: |
df0f8dc0 | 533 | up_write(&io->io_rwsem); |
93dfe2ac JK |
534 | } |
535 | ||
13ba41e3 JK |
536 | static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr, |
537 | unsigned nr_pages) | |
538 | { | |
539 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
13ba41e3 | 540 | struct bio *bio; |
6dbb1796 EB |
541 | struct bio_post_read_ctx *ctx; |
542 | unsigned int post_read_steps = 0; | |
13ba41e3 | 543 | |
d62fe971 | 544 | bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false); |
6dbb1796 | 545 | if (!bio) |
13ba41e3 | 546 | return ERR_PTR(-ENOMEM); |
13ba41e3 JK |
547 | f2fs_target_device(sbi, blkaddr, bio); |
548 | bio->bi_end_io = f2fs_read_end_io; | |
13ba41e3 JK |
549 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
550 | ||
6dbb1796 EB |
551 | if (f2fs_encrypted_file(inode)) |
552 | post_read_steps |= 1 << STEP_DECRYPT; | |
553 | if (post_read_steps) { | |
554 | ctx = mempool_alloc(bio_post_read_ctx_pool, GFP_NOFS); | |
555 | if (!ctx) { | |
556 | bio_put(bio); | |
557 | return ERR_PTR(-ENOMEM); | |
558 | } | |
559 | ctx->bio = bio; | |
560 | ctx->enabled_steps = post_read_steps; | |
561 | bio->bi_private = ctx; | |
562 | ||
563 | /* wait the page to be moved by cleaning */ | |
564 | f2fs_wait_on_block_writeback(sbi, blkaddr); | |
565 | } | |
566 | ||
13ba41e3 JK |
567 | return bio; |
568 | } | |
569 | ||
570 | /* This can handle encryption stuffs */ | |
571 | static int f2fs_submit_page_read(struct inode *inode, struct page *page, | |
572 | block_t blkaddr) | |
573 | { | |
574 | struct bio *bio = f2fs_grab_read_bio(inode, blkaddr, 1); | |
575 | ||
576 | if (IS_ERR(bio)) | |
577 | return PTR_ERR(bio); | |
578 | ||
579 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { | |
580 | bio_put(bio); | |
581 | return -EFAULT; | |
582 | } | |
583 | __submit_bio(F2FS_I_SB(inode), bio, DATA); | |
584 | return 0; | |
585 | } | |
586 | ||
46008c6d CY |
587 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
588 | { | |
589 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
590 | __le32 *addr_array; | |
7a2af766 CY |
591 | int base = 0; |
592 | ||
593 | if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode)) | |
594 | base = get_extra_isize(dn->inode); | |
46008c6d CY |
595 | |
596 | /* Get physical address of data block */ | |
597 | addr_array = blkaddr_in_node(rn); | |
7a2af766 | 598 | addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
46008c6d CY |
599 | } |
600 | ||
0a8165d7 | 601 | /* |
eb47b800 JK |
602 | * Lock ordering for the change of data block address: |
603 | * ->data_page | |
604 | * ->node_page | |
605 | * update block addresses in the node page | |
606 | */ | |
4d57b86d | 607 | void f2fs_set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 608 | { |
46008c6d CY |
609 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
610 | __set_data_blkaddr(dn); | |
611 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 612 | dn->node_changed = true; |
eb47b800 JK |
613 | } |
614 | ||
f28b3434 CY |
615 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
616 | { | |
617 | dn->data_blkaddr = blkaddr; | |
4d57b86d | 618 | f2fs_set_data_blkaddr(dn); |
f28b3434 CY |
619 | f2fs_update_extent_cache(dn); |
620 | } | |
621 | ||
46008c6d | 622 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
4d57b86d | 623 | int f2fs_reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) |
eb47b800 | 624 | { |
4081363f | 625 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
0abd675e | 626 | int err; |
eb47b800 | 627 | |
46008c6d CY |
628 | if (!count) |
629 | return 0; | |
630 | ||
91942321 | 631 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 632 | return -EPERM; |
0abd675e CY |
633 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
634 | return err; | |
eb47b800 | 635 | |
46008c6d CY |
636 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
637 | dn->ofs_in_node, count); | |
638 | ||
639 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
640 | ||
641 | for (; count > 0; dn->ofs_in_node++) { | |
7a2af766 CY |
642 | block_t blkaddr = datablock_addr(dn->inode, |
643 | dn->node_page, dn->ofs_in_node); | |
46008c6d CY |
644 | if (blkaddr == NULL_ADDR) { |
645 | dn->data_blkaddr = NEW_ADDR; | |
646 | __set_data_blkaddr(dn); | |
647 | count--; | |
648 | } | |
649 | } | |
650 | ||
651 | if (set_page_dirty(dn->node_page)) | |
652 | dn->node_changed = true; | |
eb47b800 JK |
653 | return 0; |
654 | } | |
655 | ||
46008c6d | 656 | /* Should keep dn->ofs_in_node unchanged */ |
4d57b86d | 657 | int f2fs_reserve_new_block(struct dnode_of_data *dn) |
46008c6d CY |
658 | { |
659 | unsigned int ofs_in_node = dn->ofs_in_node; | |
660 | int ret; | |
661 | ||
4d57b86d | 662 | ret = f2fs_reserve_new_blocks(dn, 1); |
46008c6d CY |
663 | dn->ofs_in_node = ofs_in_node; |
664 | return ret; | |
665 | } | |
666 | ||
b600965c HL |
667 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
668 | { | |
669 | bool need_put = dn->inode_page ? false : true; | |
670 | int err; | |
671 | ||
4d57b86d | 672 | err = f2fs_get_dnode_of_data(dn, index, ALLOC_NODE); |
b600965c HL |
673 | if (err) |
674 | return err; | |
a8865372 | 675 | |
b600965c | 676 | if (dn->data_blkaddr == NULL_ADDR) |
4d57b86d | 677 | err = f2fs_reserve_new_block(dn); |
a8865372 | 678 | if (err || need_put) |
b600965c HL |
679 | f2fs_put_dnode(dn); |
680 | return err; | |
681 | } | |
682 | ||
759af1c9 | 683 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 684 | { |
e15882b6 | 685 | struct extent_info ei = {0,0,0}; |
759af1c9 | 686 | struct inode *inode = dn->inode; |
028a41e8 | 687 | |
759af1c9 FL |
688 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
689 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
690 | return 0; | |
429511cd | 691 | } |
028a41e8 | 692 | |
759af1c9 | 693 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
694 | } |
695 | ||
4d57b86d | 696 | struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 697 | int op_flags, bool for_write) |
eb47b800 | 698 | { |
eb47b800 JK |
699 | struct address_space *mapping = inode->i_mapping; |
700 | struct dnode_of_data dn; | |
701 | struct page *page; | |
e15882b6 | 702 | struct extent_info ei = {0,0,0}; |
eb47b800 | 703 | int err; |
4375a336 | 704 | |
a56c7c6f | 705 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
706 | if (!page) |
707 | return ERR_PTR(-ENOMEM); | |
708 | ||
cb3bc9ee CY |
709 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
710 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
711 | goto got_it; | |
712 | } | |
713 | ||
eb47b800 | 714 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
4d57b86d | 715 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
716 | if (err) |
717 | goto put_err; | |
eb47b800 JK |
718 | f2fs_put_dnode(&dn); |
719 | ||
6bacf52f | 720 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
721 | err = -ENOENT; |
722 | goto put_err; | |
650495de | 723 | } |
cb3bc9ee | 724 | got_it: |
43f3eae1 JK |
725 | if (PageUptodate(page)) { |
726 | unlock_page(page); | |
eb47b800 | 727 | return page; |
43f3eae1 | 728 | } |
eb47b800 | 729 | |
d59ff4df JK |
730 | /* |
731 | * A new dentry page is allocated but not able to be written, since its | |
732 | * new inode page couldn't be allocated due to -ENOSPC. | |
733 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
4d57b86d CY |
734 | * see, f2fs_add_link -> f2fs_get_new_data_page -> |
735 | * f2fs_init_inode_metadata. | |
d59ff4df JK |
736 | */ |
737 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 738 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
739 | if (!PageUptodate(page)) |
740 | SetPageUptodate(page); | |
43f3eae1 | 741 | unlock_page(page); |
d59ff4df JK |
742 | return page; |
743 | } | |
eb47b800 | 744 | |
13ba41e3 | 745 | err = f2fs_submit_page_read(inode, page, dn.data_blkaddr); |
393ff91f | 746 | if (err) |
86531d6b | 747 | goto put_err; |
43f3eae1 | 748 | return page; |
86531d6b JK |
749 | |
750 | put_err: | |
751 | f2fs_put_page(page, 1); | |
752 | return ERR_PTR(err); | |
43f3eae1 JK |
753 | } |
754 | ||
4d57b86d | 755 | struct page *f2fs_find_data_page(struct inode *inode, pgoff_t index) |
43f3eae1 JK |
756 | { |
757 | struct address_space *mapping = inode->i_mapping; | |
758 | struct page *page; | |
759 | ||
760 | page = find_get_page(mapping, index); | |
761 | if (page && PageUptodate(page)) | |
762 | return page; | |
763 | f2fs_put_page(page, 0); | |
764 | ||
4d57b86d | 765 | page = f2fs_get_read_data_page(inode, index, 0, false); |
43f3eae1 JK |
766 | if (IS_ERR(page)) |
767 | return page; | |
768 | ||
769 | if (PageUptodate(page)) | |
770 | return page; | |
771 | ||
772 | wait_on_page_locked(page); | |
773 | if (unlikely(!PageUptodate(page))) { | |
774 | f2fs_put_page(page, 0); | |
775 | return ERR_PTR(-EIO); | |
776 | } | |
777 | return page; | |
778 | } | |
779 | ||
780 | /* | |
781 | * If it tries to access a hole, return an error. | |
782 | * Because, the callers, functions in dir.c and GC, should be able to know | |
783 | * whether this page exists or not. | |
784 | */ | |
4d57b86d | 785 | struct page *f2fs_get_lock_data_page(struct inode *inode, pgoff_t index, |
a56c7c6f | 786 | bool for_write) |
43f3eae1 JK |
787 | { |
788 | struct address_space *mapping = inode->i_mapping; | |
789 | struct page *page; | |
790 | repeat: | |
4d57b86d | 791 | page = f2fs_get_read_data_page(inode, index, 0, for_write); |
43f3eae1 JK |
792 | if (IS_ERR(page)) |
793 | return page; | |
393ff91f | 794 | |
43f3eae1 | 795 | /* wait for read completion */ |
393ff91f | 796 | lock_page(page); |
6bacf52f | 797 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
798 | f2fs_put_page(page, 1); |
799 | goto repeat; | |
eb47b800 | 800 | } |
1563ac75 CY |
801 | if (unlikely(!PageUptodate(page))) { |
802 | f2fs_put_page(page, 1); | |
803 | return ERR_PTR(-EIO); | |
804 | } | |
eb47b800 JK |
805 | return page; |
806 | } | |
807 | ||
0a8165d7 | 808 | /* |
eb47b800 JK |
809 | * Caller ensures that this data page is never allocated. |
810 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 811 | * |
4f4124d0 CY |
812 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
813 | * f2fs_unlock_op(). | |
470f00e9 CY |
814 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
815 | * ipage should be released by this function. | |
eb47b800 | 816 | */ |
4d57b86d | 817 | struct page *f2fs_get_new_data_page(struct inode *inode, |
a8865372 | 818 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 819 | { |
eb47b800 JK |
820 | struct address_space *mapping = inode->i_mapping; |
821 | struct page *page; | |
822 | struct dnode_of_data dn; | |
823 | int err; | |
7612118a | 824 | |
a56c7c6f | 825 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
826 | if (!page) { |
827 | /* | |
828 | * before exiting, we should make sure ipage will be released | |
829 | * if any error occur. | |
830 | */ | |
831 | f2fs_put_page(ipage, 1); | |
01f28610 | 832 | return ERR_PTR(-ENOMEM); |
470f00e9 | 833 | } |
eb47b800 | 834 | |
a8865372 | 835 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 836 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
837 | if (err) { |
838 | f2fs_put_page(page, 1); | |
eb47b800 | 839 | return ERR_PTR(err); |
a8865372 | 840 | } |
01f28610 JK |
841 | if (!ipage) |
842 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
843 | |
844 | if (PageUptodate(page)) | |
01f28610 | 845 | goto got_it; |
eb47b800 JK |
846 | |
847 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 848 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
849 | if (!PageUptodate(page)) |
850 | SetPageUptodate(page); | |
eb47b800 | 851 | } else { |
4375a336 | 852 | f2fs_put_page(page, 1); |
a8865372 | 853 | |
7612118a JK |
854 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
855 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
4d57b86d | 856 | page = f2fs_get_lock_data_page(inode, index, true); |
4375a336 | 857 | if (IS_ERR(page)) |
7612118a | 858 | return page; |
eb47b800 | 859 | } |
01f28610 | 860 | got_it: |
9edcdabf | 861 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 862 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 863 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
864 | return page; |
865 | } | |
866 | ||
d5097be5 | 867 | static int __allocate_data_block(struct dnode_of_data *dn, int seg_type) |
bfad7c2d | 868 | { |
4081363f | 869 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 870 | struct f2fs_summary sum; |
bfad7c2d | 871 | struct node_info ni; |
976e4c50 | 872 | pgoff_t fofs; |
46008c6d | 873 | blkcnt_t count = 1; |
0abd675e | 874 | int err; |
bfad7c2d | 875 | |
91942321 | 876 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 877 | return -EPERM; |
df6136ef | 878 | |
7a2af766 CY |
879 | dn->data_blkaddr = datablock_addr(dn->inode, |
880 | dn->node_page, dn->ofs_in_node); | |
df6136ef CY |
881 | if (dn->data_blkaddr == NEW_ADDR) |
882 | goto alloc; | |
883 | ||
0abd675e CY |
884 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
885 | return err; | |
bfad7c2d | 886 | |
df6136ef | 887 | alloc: |
4d57b86d | 888 | f2fs_get_node_info(sbi, dn->nid, &ni); |
bfad7c2d JK |
889 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); |
890 | ||
4d57b86d | 891 | f2fs_allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
d5097be5 | 892 | &sum, seg_type, NULL, false); |
4d57b86d | 893 | f2fs_set_data_blkaddr(dn); |
bfad7c2d | 894 | |
976e4c50 | 895 | /* update i_size */ |
4d57b86d | 896 | fofs = f2fs_start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 897 | dn->ofs_in_node; |
09cbfeaf | 898 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 899 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 900 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
901 | return 0; |
902 | } | |
903 | ||
a7de6086 | 904 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 905 | { |
b439b103 | 906 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 907 | struct f2fs_map_blocks map; |
d6d478a1 | 908 | int flag; |
a7de6086 | 909 | int err = 0; |
d6d478a1 | 910 | bool direct_io = iocb->ki_flags & IOCB_DIRECT; |
59b802e5 | 911 | |
71ad682c | 912 | /* convert inline data for Direct I/O*/ |
d6d478a1 | 913 | if (direct_io) { |
71ad682c WG |
914 | err = f2fs_convert_inline_inode(inode); |
915 | if (err) | |
916 | return err; | |
917 | } | |
918 | ||
dc91de78 JK |
919 | if (is_inode_flag_set(inode, FI_NO_PREALLOC)) |
920 | return 0; | |
921 | ||
0080c507 | 922 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
923 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
924 | if (map.m_len > map.m_lblk) | |
925 | map.m_len -= map.m_lblk; | |
926 | else | |
927 | map.m_len = 0; | |
928 | ||
da85985c | 929 | map.m_next_pgofs = NULL; |
c4020b2d | 930 | map.m_next_extent = NULL; |
d5097be5 | 931 | map.m_seg_type = NO_CHECK_TYPE; |
2a340760 | 932 | |
d6d478a1 | 933 | if (direct_io) { |
4d57b86d | 934 | map.m_seg_type = f2fs_rw_hint_to_seg_type(iocb->ki_hint); |
b91050a8 | 935 | flag = f2fs_force_buffered_io(inode, WRITE) ? |
d6d478a1 CY |
936 | F2FS_GET_BLOCK_PRE_AIO : |
937 | F2FS_GET_BLOCK_PRE_DIO; | |
938 | goto map_blocks; | |
d5097be5 | 939 | } |
f2470371 | 940 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) { |
a7de6086 JK |
941 | err = f2fs_convert_inline_inode(inode); |
942 | if (err) | |
943 | return err; | |
b439b103 | 944 | } |
d6d478a1 | 945 | if (f2fs_has_inline_data(inode)) |
25006645 | 946 | return err; |
d6d478a1 CY |
947 | |
948 | flag = F2FS_GET_BLOCK_PRE_AIO; | |
949 | ||
950 | map_blocks: | |
951 | err = f2fs_map_blocks(inode, &map, 1, flag); | |
952 | if (map.m_len > 0 && err == -ENOSPC) { | |
953 | if (!direct_io) | |
954 | set_inode_flag(inode, FI_NO_PREALLOC); | |
955 | err = 0; | |
25006645 | 956 | } |
a7de6086 | 957 | return err; |
59b802e5 JK |
958 | } |
959 | ||
59c9081b YH |
960 | static inline void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock) |
961 | { | |
962 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { | |
963 | if (lock) | |
964 | down_read(&sbi->node_change); | |
965 | else | |
966 | up_read(&sbi->node_change); | |
967 | } else { | |
968 | if (lock) | |
969 | f2fs_lock_op(sbi); | |
970 | else | |
971 | f2fs_unlock_op(sbi); | |
972 | } | |
973 | } | |
974 | ||
0a8165d7 | 975 | /* |
003a3e1d JK |
976 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
977 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
978 | * If original data blocks are allocated, then give them to blockdev. |
979 | * Otherwise, | |
980 | * a. preallocate requested block addresses | |
981 | * b. do not use extent cache for better performance | |
982 | * c. give the block addresses to blockdev | |
eb47b800 | 983 | */ |
d323d005 | 984 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 985 | int create, int flag) |
eb47b800 | 986 | { |
003a3e1d | 987 | unsigned int maxblocks = map->m_len; |
eb47b800 | 988 | struct dnode_of_data dn; |
f9811703 | 989 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 990 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 991 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 992 | int err = 0, ofs = 1; |
46008c6d CY |
993 | unsigned int ofs_in_node, last_ofs_in_node; |
994 | blkcnt_t prealloc; | |
e15882b6 | 995 | struct extent_info ei = {0,0,0}; |
7df3a431 | 996 | block_t blkaddr; |
c4020b2d | 997 | unsigned int start_pgofs; |
eb47b800 | 998 | |
dfd02e4d CY |
999 | if (!maxblocks) |
1000 | return 0; | |
1001 | ||
003a3e1d JK |
1002 | map->m_len = 0; |
1003 | map->m_flags = 0; | |
1004 | ||
1005 | /* it only supports block size == page size */ | |
1006 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 1007 | end = pgofs + maxblocks; |
eb47b800 | 1008 | |
24b84912 | 1009 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
1010 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
1011 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
1012 | map->m_flags = F2FS_MAP_MAPPED; | |
c4020b2d CY |
1013 | if (map->m_next_extent) |
1014 | *map->m_next_extent = pgofs + map->m_len; | |
bfad7c2d | 1015 | goto out; |
a2e7d1bf | 1016 | } |
bfad7c2d | 1017 | |
4fe71e88 | 1018 | next_dnode: |
59b802e5 | 1019 | if (create) |
59c9081b | 1020 | __do_map_lock(sbi, flag, true); |
eb47b800 JK |
1021 | |
1022 | /* When reading holes, we need its node page */ | |
1023 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
4d57b86d | 1024 | err = f2fs_get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 1025 | if (err) { |
43473f96 CY |
1026 | if (flag == F2FS_GET_BLOCK_BMAP) |
1027 | map->m_pblk = 0; | |
da85985c | 1028 | if (err == -ENOENT) { |
bfad7c2d | 1029 | err = 0; |
da85985c CY |
1030 | if (map->m_next_pgofs) |
1031 | *map->m_next_pgofs = | |
4d57b86d | 1032 | f2fs_get_next_page_offset(&dn, pgofs); |
c4020b2d CY |
1033 | if (map->m_next_extent) |
1034 | *map->m_next_extent = | |
4d57b86d | 1035 | f2fs_get_next_page_offset(&dn, pgofs); |
da85985c | 1036 | } |
bfad7c2d | 1037 | goto unlock_out; |
848753aa | 1038 | } |
973163fc | 1039 | |
c4020b2d | 1040 | start_pgofs = pgofs; |
46008c6d | 1041 | prealloc = 0; |
230436b3 | 1042 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 1043 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
1044 | |
1045 | next_block: | |
7a2af766 | 1046 | blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node); |
4fe71e88 | 1047 | |
7b525dd0 | 1048 | if (!is_valid_blkaddr(blkaddr)) { |
973163fc | 1049 | if (create) { |
f9811703 CY |
1050 | if (unlikely(f2fs_cp_error(sbi))) { |
1051 | err = -EIO; | |
4fe71e88 | 1052 | goto sync_out; |
f9811703 | 1053 | } |
24b84912 | 1054 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
1055 | if (blkaddr == NULL_ADDR) { |
1056 | prealloc++; | |
1057 | last_ofs_in_node = dn.ofs_in_node; | |
1058 | } | |
24b84912 | 1059 | } else { |
d5097be5 HL |
1060 | err = __allocate_data_block(&dn, |
1061 | map->m_seg_type); | |
6f2d8ed6 | 1062 | if (!err) |
91942321 | 1063 | set_inode_flag(inode, FI_APPEND_WRITE); |
24b84912 | 1064 | } |
973163fc | 1065 | if (err) |
4fe71e88 | 1066 | goto sync_out; |
3f2be043 | 1067 | map->m_flags |= F2FS_MAP_NEW; |
4fe71e88 | 1068 | blkaddr = dn.data_blkaddr; |
973163fc | 1069 | } else { |
43473f96 CY |
1070 | if (flag == F2FS_GET_BLOCK_BMAP) { |
1071 | map->m_pblk = 0; | |
1072 | goto sync_out; | |
1073 | } | |
c4020b2d CY |
1074 | if (flag == F2FS_GET_BLOCK_PRECACHE) |
1075 | goto sync_out; | |
da85985c CY |
1076 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
1077 | blkaddr == NULL_ADDR) { | |
1078 | if (map->m_next_pgofs) | |
1079 | *map->m_next_pgofs = pgofs + 1; | |
4c2ac6a8 | 1080 | goto sync_out; |
da85985c | 1081 | } |
f3d98e74 CY |
1082 | if (flag != F2FS_GET_BLOCK_FIEMAP) { |
1083 | /* for defragment case */ | |
1084 | if (map->m_next_pgofs) | |
1085 | *map->m_next_pgofs = pgofs + 1; | |
4fe71e88 | 1086 | goto sync_out; |
f3d98e74 | 1087 | } |
e2b4e2bc | 1088 | } |
e2b4e2bc | 1089 | } |
eb47b800 | 1090 | |
46008c6d CY |
1091 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
1092 | goto skip; | |
1093 | ||
4fe71e88 CY |
1094 | if (map->m_len == 0) { |
1095 | /* preallocated unwritten block should be mapped for fiemap. */ | |
1096 | if (blkaddr == NEW_ADDR) | |
1097 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
1098 | map->m_flags |= F2FS_MAP_MAPPED; | |
1099 | ||
1100 | map->m_pblk = blkaddr; | |
1101 | map->m_len = 1; | |
1102 | } else if ((map->m_pblk != NEW_ADDR && | |
1103 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 1104 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 1105 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
1106 | ofs++; |
1107 | map->m_len++; | |
1108 | } else { | |
1109 | goto sync_out; | |
1110 | } | |
bfad7c2d | 1111 | |
46008c6d | 1112 | skip: |
bfad7c2d JK |
1113 | dn.ofs_in_node++; |
1114 | pgofs++; | |
1115 | ||
46008c6d CY |
1116 | /* preallocate blocks in batch for one dnode page */ |
1117 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
1118 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 1119 | |
46008c6d | 1120 | dn.ofs_in_node = ofs_in_node; |
4d57b86d | 1121 | err = f2fs_reserve_new_blocks(&dn, prealloc); |
46008c6d CY |
1122 | if (err) |
1123 | goto sync_out; | |
bfad7c2d | 1124 | |
46008c6d CY |
1125 | map->m_len += dn.ofs_in_node - ofs_in_node; |
1126 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
1127 | err = -ENOSPC; | |
1128 | goto sync_out; | |
3104af35 | 1129 | } |
46008c6d CY |
1130 | dn.ofs_in_node = end_offset; |
1131 | } | |
1132 | ||
1133 | if (pgofs >= end) | |
1134 | goto sync_out; | |
1135 | else if (dn.ofs_in_node < end_offset) | |
1136 | goto next_block; | |
1137 | ||
c4020b2d CY |
1138 | if (flag == F2FS_GET_BLOCK_PRECACHE) { |
1139 | if (map->m_flags & F2FS_MAP_MAPPED) { | |
1140 | unsigned int ofs = start_pgofs - map->m_lblk; | |
1141 | ||
1142 | f2fs_update_extent_cache_range(&dn, | |
1143 | start_pgofs, map->m_pblk + ofs, | |
1144 | map->m_len - ofs); | |
1145 | } | |
1146 | } | |
1147 | ||
46008c6d CY |
1148 | f2fs_put_dnode(&dn); |
1149 | ||
1150 | if (create) { | |
59c9081b | 1151 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 1152 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 1153 | } |
46008c6d | 1154 | goto next_dnode; |
7df3a431 | 1155 | |
bfad7c2d | 1156 | sync_out: |
c4020b2d CY |
1157 | if (flag == F2FS_GET_BLOCK_PRECACHE) { |
1158 | if (map->m_flags & F2FS_MAP_MAPPED) { | |
1159 | unsigned int ofs = start_pgofs - map->m_lblk; | |
1160 | ||
1161 | f2fs_update_extent_cache_range(&dn, | |
1162 | start_pgofs, map->m_pblk + ofs, | |
1163 | map->m_len - ofs); | |
1164 | } | |
1165 | if (map->m_next_extent) | |
1166 | *map->m_next_extent = pgofs + 1; | |
1167 | } | |
eb47b800 | 1168 | f2fs_put_dnode(&dn); |
bfad7c2d | 1169 | unlock_out: |
2a340760 | 1170 | if (create) { |
59c9081b | 1171 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 1172 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 1173 | } |
bfad7c2d | 1174 | out: |
003a3e1d | 1175 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 1176 | return err; |
eb47b800 JK |
1177 | } |
1178 | ||
b91050a8 HL |
1179 | bool f2fs_overwrite_io(struct inode *inode, loff_t pos, size_t len) |
1180 | { | |
1181 | struct f2fs_map_blocks map; | |
1182 | block_t last_lblk; | |
1183 | int err; | |
1184 | ||
1185 | if (pos + len > i_size_read(inode)) | |
1186 | return false; | |
1187 | ||
1188 | map.m_lblk = F2FS_BYTES_TO_BLK(pos); | |
1189 | map.m_next_pgofs = NULL; | |
1190 | map.m_next_extent = NULL; | |
1191 | map.m_seg_type = NO_CHECK_TYPE; | |
1192 | last_lblk = F2FS_BLK_ALIGN(pos + len); | |
1193 | ||
1194 | while (map.m_lblk < last_lblk) { | |
1195 | map.m_len = last_lblk - map.m_lblk; | |
1196 | err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_DEFAULT); | |
1197 | if (err || map.m_len == 0) | |
1198 | return false; | |
1199 | map.m_lblk += map.m_len; | |
1200 | } | |
1201 | return true; | |
1202 | } | |
1203 | ||
003a3e1d | 1204 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c | 1205 | struct buffer_head *bh, int create, int flag, |
d5097be5 | 1206 | pgoff_t *next_pgofs, int seg_type) |
003a3e1d JK |
1207 | { |
1208 | struct f2fs_map_blocks map; | |
a7de6086 | 1209 | int err; |
003a3e1d JK |
1210 | |
1211 | map.m_lblk = iblock; | |
1212 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 1213 | map.m_next_pgofs = next_pgofs; |
c4020b2d | 1214 | map.m_next_extent = NULL; |
d5097be5 | 1215 | map.m_seg_type = seg_type; |
003a3e1d | 1216 | |
a7de6086 JK |
1217 | err = f2fs_map_blocks(inode, &map, create, flag); |
1218 | if (!err) { | |
003a3e1d JK |
1219 | map_bh(bh, inode->i_sb, map.m_pblk); |
1220 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
b86e3307 | 1221 | bh->b_size = (u64)map.m_len << inode->i_blkbits; |
003a3e1d | 1222 | } |
a7de6086 | 1223 | return err; |
003a3e1d JK |
1224 | } |
1225 | ||
ccfb3000 | 1226 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
1227 | struct buffer_head *bh_result, int create, int flag, |
1228 | pgoff_t *next_pgofs) | |
e2b4e2bc | 1229 | { |
da85985c | 1230 | return __get_data_block(inode, iblock, bh_result, create, |
d5097be5 HL |
1231 | flag, next_pgofs, |
1232 | NO_CHECK_TYPE); | |
e2b4e2bc CY |
1233 | } |
1234 | ||
1235 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
1236 | struct buffer_head *bh_result, int create) |
1237 | { | |
e2b4e2bc | 1238 | return __get_data_block(inode, iblock, bh_result, create, |
d5097be5 | 1239 | F2FS_GET_BLOCK_DEFAULT, NULL, |
4d57b86d | 1240 | f2fs_rw_hint_to_seg_type( |
d5097be5 | 1241 | inode->i_write_hint)); |
ccfb3000 JK |
1242 | } |
1243 | ||
e2b4e2bc | 1244 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
1245 | struct buffer_head *bh_result, int create) |
1246 | { | |
179448bf | 1247 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 1248 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
1249 | return -EFBIG; |
1250 | ||
e2b4e2bc | 1251 | return __get_data_block(inode, iblock, bh_result, create, |
d5097be5 HL |
1252 | F2FS_GET_BLOCK_BMAP, NULL, |
1253 | NO_CHECK_TYPE); | |
ccfb3000 JK |
1254 | } |
1255 | ||
7f63eb77 JK |
1256 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
1257 | { | |
1258 | return (offset >> inode->i_blkbits); | |
1259 | } | |
1260 | ||
1261 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
1262 | { | |
1263 | return (blk << inode->i_blkbits); | |
1264 | } | |
1265 | ||
442a9dbd CY |
1266 | static int f2fs_xattr_fiemap(struct inode *inode, |
1267 | struct fiemap_extent_info *fieinfo) | |
1268 | { | |
1269 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1270 | struct page *page; | |
1271 | struct node_info ni; | |
1272 | __u64 phys = 0, len; | |
1273 | __u32 flags; | |
1274 | nid_t xnid = F2FS_I(inode)->i_xattr_nid; | |
1275 | int err = 0; | |
1276 | ||
1277 | if (f2fs_has_inline_xattr(inode)) { | |
1278 | int offset; | |
1279 | ||
1280 | page = f2fs_grab_cache_page(NODE_MAPPING(sbi), | |
1281 | inode->i_ino, false); | |
1282 | if (!page) | |
1283 | return -ENOMEM; | |
1284 | ||
4d57b86d | 1285 | f2fs_get_node_info(sbi, inode->i_ino, &ni); |
442a9dbd CY |
1286 | |
1287 | phys = (__u64)blk_to_logical(inode, ni.blk_addr); | |
1288 | offset = offsetof(struct f2fs_inode, i_addr) + | |
1289 | sizeof(__le32) * (DEF_ADDRS_PER_INODE - | |
b323fd28 | 1290 | get_inline_xattr_addrs(inode)); |
442a9dbd CY |
1291 | |
1292 | phys += offset; | |
1293 | len = inline_xattr_size(inode); | |
1294 | ||
1295 | f2fs_put_page(page, 1); | |
1296 | ||
1297 | flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED; | |
1298 | ||
1299 | if (!xnid) | |
1300 | flags |= FIEMAP_EXTENT_LAST; | |
1301 | ||
1302 | err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); | |
1303 | if (err || err == 1) | |
1304 | return err; | |
1305 | } | |
1306 | ||
1307 | if (xnid) { | |
1308 | page = f2fs_grab_cache_page(NODE_MAPPING(sbi), xnid, false); | |
1309 | if (!page) | |
1310 | return -ENOMEM; | |
1311 | ||
4d57b86d | 1312 | f2fs_get_node_info(sbi, xnid, &ni); |
442a9dbd CY |
1313 | |
1314 | phys = (__u64)blk_to_logical(inode, ni.blk_addr); | |
1315 | len = inode->i_sb->s_blocksize; | |
1316 | ||
1317 | f2fs_put_page(page, 1); | |
1318 | ||
1319 | flags = FIEMAP_EXTENT_LAST; | |
1320 | } | |
1321 | ||
1322 | if (phys) | |
1323 | err = fiemap_fill_next_extent(fieinfo, 0, phys, len, flags); | |
1324 | ||
1325 | return (err < 0 ? err : 0); | |
1326 | } | |
1327 | ||
9ab70134 JK |
1328 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1329 | u64 start, u64 len) | |
1330 | { | |
7f63eb77 JK |
1331 | struct buffer_head map_bh; |
1332 | sector_t start_blk, last_blk; | |
da85985c | 1333 | pgoff_t next_pgofs; |
7f63eb77 JK |
1334 | u64 logical = 0, phys = 0, size = 0; |
1335 | u32 flags = 0; | |
7f63eb77 JK |
1336 | int ret = 0; |
1337 | ||
c4020b2d CY |
1338 | if (fieinfo->fi_flags & FIEMAP_FLAG_CACHE) { |
1339 | ret = f2fs_precache_extents(inode); | |
1340 | if (ret) | |
1341 | return ret; | |
1342 | } | |
1343 | ||
442a9dbd | 1344 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC | FIEMAP_FLAG_XATTR); |
7f63eb77 JK |
1345 | if (ret) |
1346 | return ret; | |
1347 | ||
f1b43d4c CY |
1348 | inode_lock(inode); |
1349 | ||
442a9dbd CY |
1350 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) { |
1351 | ret = f2fs_xattr_fiemap(inode, fieinfo); | |
1352 | goto out; | |
1353 | } | |
1354 | ||
67f8cf3c JK |
1355 | if (f2fs_has_inline_data(inode)) { |
1356 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
1357 | if (ret != -EAGAIN) | |
f1b43d4c | 1358 | goto out; |
67f8cf3c JK |
1359 | } |
1360 | ||
7f63eb77 JK |
1361 | if (logical_to_blk(inode, len) == 0) |
1362 | len = blk_to_logical(inode, 1); | |
1363 | ||
1364 | start_blk = logical_to_blk(inode, start); | |
1365 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 1366 | |
7f63eb77 JK |
1367 | next: |
1368 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
1369 | map_bh.b_size = len; | |
1370 | ||
e2b4e2bc | 1371 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 1372 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
1373 | if (ret) |
1374 | goto out; | |
1375 | ||
1376 | /* HOLE */ | |
1377 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 1378 | start_blk = next_pgofs; |
58736fa6 CY |
1379 | |
1380 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
1381 | F2FS_I_SB(inode)->max_file_blocks)) | |
9a950d52 | 1382 | goto prep_next; |
58736fa6 | 1383 | |
9a950d52 FL |
1384 | flags |= FIEMAP_EXTENT_LAST; |
1385 | } | |
7f63eb77 | 1386 | |
da5af127 CY |
1387 | if (size) { |
1388 | if (f2fs_encrypted_inode(inode)) | |
1389 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
1390 | ||
9a950d52 FL |
1391 | ret = fiemap_fill_next_extent(fieinfo, logical, |
1392 | phys, size, flags); | |
da5af127 | 1393 | } |
7f63eb77 | 1394 | |
9a950d52 FL |
1395 | if (start_blk > last_blk || ret) |
1396 | goto out; | |
7f63eb77 | 1397 | |
9a950d52 FL |
1398 | logical = blk_to_logical(inode, start_blk); |
1399 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
1400 | size = map_bh.b_size; | |
1401 | flags = 0; | |
1402 | if (buffer_unwritten(&map_bh)) | |
1403 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 1404 | |
9a950d52 | 1405 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 1406 | |
9a950d52 | 1407 | prep_next: |
7f63eb77 JK |
1408 | cond_resched(); |
1409 | if (fatal_signal_pending(current)) | |
1410 | ret = -EINTR; | |
1411 | else | |
1412 | goto next; | |
1413 | out: | |
1414 | if (ret == 1) | |
1415 | ret = 0; | |
1416 | ||
5955102c | 1417 | inode_unlock(inode); |
7f63eb77 | 1418 | return ret; |
9ab70134 JK |
1419 | } |
1420 | ||
f1e88660 JK |
1421 | /* |
1422 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1423 | * Major change was from block_size == page_size in f2fs by default. | |
1424 | */ | |
1425 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1426 | struct list_head *pages, struct page *page, | |
1427 | unsigned nr_pages) | |
1428 | { | |
1429 | struct bio *bio = NULL; | |
f1e88660 JK |
1430 | sector_t last_block_in_bio = 0; |
1431 | struct inode *inode = mapping->host; | |
1432 | const unsigned blkbits = inode->i_blkbits; | |
1433 | const unsigned blocksize = 1 << blkbits; | |
1434 | sector_t block_in_file; | |
1435 | sector_t last_block; | |
1436 | sector_t last_block_in_file; | |
1437 | sector_t block_nr; | |
f1e88660 JK |
1438 | struct f2fs_map_blocks map; |
1439 | ||
1440 | map.m_pblk = 0; | |
1441 | map.m_lblk = 0; | |
1442 | map.m_len = 0; | |
1443 | map.m_flags = 0; | |
da85985c | 1444 | map.m_next_pgofs = NULL; |
c4020b2d | 1445 | map.m_next_extent = NULL; |
d5097be5 | 1446 | map.m_seg_type = NO_CHECK_TYPE; |
f1e88660 | 1447 | |
736c0a74 | 1448 | for (; nr_pages; nr_pages--) { |
f1e88660 | 1449 | if (pages) { |
939afa94 | 1450 | page = list_last_entry(pages, struct page, lru); |
a83d50bc KM |
1451 | |
1452 | prefetchw(&page->flags); | |
f1e88660 JK |
1453 | list_del(&page->lru); |
1454 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1455 | page->index, |
1456 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1457 | goto next_page; |
1458 | } | |
1459 | ||
1460 | block_in_file = (sector_t)page->index; | |
1461 | last_block = block_in_file + nr_pages; | |
1462 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1463 | blkbits; | |
1464 | if (last_block > last_block_in_file) | |
1465 | last_block = last_block_in_file; | |
1466 | ||
1467 | /* | |
1468 | * Map blocks using the previous result first. | |
1469 | */ | |
1470 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1471 | block_in_file > map.m_lblk && | |
1472 | block_in_file < (map.m_lblk + map.m_len)) | |
1473 | goto got_it; | |
1474 | ||
1475 | /* | |
1476 | * Then do more f2fs_map_blocks() calls until we are | |
1477 | * done with this page. | |
1478 | */ | |
1479 | map.m_flags = 0; | |
1480 | ||
1481 | if (block_in_file < last_block) { | |
1482 | map.m_lblk = block_in_file; | |
1483 | map.m_len = last_block - block_in_file; | |
1484 | ||
46c9e141 | 1485 | if (f2fs_map_blocks(inode, &map, 0, |
f2220c7f | 1486 | F2FS_GET_BLOCK_DEFAULT)) |
f1e88660 JK |
1487 | goto set_error_page; |
1488 | } | |
1489 | got_it: | |
1490 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1491 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1492 | SetPageMappedToDisk(page); | |
1493 | ||
1494 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1495 | SetPageUptodate(page); | |
1496 | goto confused; | |
1497 | } | |
1498 | } else { | |
09cbfeaf | 1499 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
1500 | if (!PageUptodate(page)) |
1501 | SetPageUptodate(page); | |
f1e88660 JK |
1502 | unlock_page(page); |
1503 | goto next_page; | |
1504 | } | |
1505 | ||
1506 | /* | |
1507 | * This page will go to BIO. Do we need to send this | |
1508 | * BIO off first? | |
1509 | */ | |
3c62be17 JK |
1510 | if (bio && (last_block_in_bio != block_nr - 1 || |
1511 | !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) { | |
f1e88660 | 1512 | submit_and_realloc: |
4fc29c1a | 1513 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1514 | bio = NULL; |
1515 | } | |
1516 | if (bio == NULL) { | |
13ba41e3 | 1517 | bio = f2fs_grab_read_bio(inode, block_nr, nr_pages); |
1d353eb7 JK |
1518 | if (IS_ERR(bio)) { |
1519 | bio = NULL; | |
f1e88660 | 1520 | goto set_error_page; |
4375a336 | 1521 | } |
f1e88660 JK |
1522 | } |
1523 | ||
1524 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1525 | goto submit_and_realloc; | |
1526 | ||
1527 | last_block_in_bio = block_nr; | |
1528 | goto next_page; | |
1529 | set_error_page: | |
1530 | SetPageError(page); | |
09cbfeaf | 1531 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1532 | unlock_page(page); |
1533 | goto next_page; | |
1534 | confused: | |
1535 | if (bio) { | |
4fc29c1a | 1536 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1537 | bio = NULL; |
1538 | } | |
1539 | unlock_page(page); | |
1540 | next_page: | |
1541 | if (pages) | |
09cbfeaf | 1542 | put_page(page); |
f1e88660 JK |
1543 | } |
1544 | BUG_ON(pages && !list_empty(pages)); | |
1545 | if (bio) | |
4fc29c1a | 1546 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1547 | return 0; |
1548 | } | |
1549 | ||
eb47b800 JK |
1550 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1551 | { | |
9ffe0fb5 | 1552 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1553 | int ret = -EAGAIN; |
9ffe0fb5 | 1554 | |
c20e89cd CY |
1555 | trace_f2fs_readpage(page, DATA); |
1556 | ||
e1c42045 | 1557 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1558 | if (f2fs_has_inline_data(inode)) |
1559 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1560 | if (ret == -EAGAIN) |
f1e88660 | 1561 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1562 | return ret; |
eb47b800 JK |
1563 | } |
1564 | ||
1565 | static int f2fs_read_data_pages(struct file *file, | |
1566 | struct address_space *mapping, | |
1567 | struct list_head *pages, unsigned nr_pages) | |
1568 | { | |
71cb4aff | 1569 | struct inode *inode = mapping->host; |
939afa94 | 1570 | struct page *page = list_last_entry(pages, struct page, lru); |
b8c29400 CY |
1571 | |
1572 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1573 | |
1574 | /* If the file has inline data, skip readpages */ | |
1575 | if (f2fs_has_inline_data(inode)) | |
1576 | return 0; | |
1577 | ||
f1e88660 | 1578 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1579 | } |
1580 | ||
7eab0c0d HP |
1581 | static int encrypt_one_page(struct f2fs_io_info *fio) |
1582 | { | |
1583 | struct inode *inode = fio->page->mapping->host; | |
1584 | gfp_t gfp_flags = GFP_NOFS; | |
1585 | ||
1958593e | 1586 | if (!f2fs_encrypted_file(inode)) |
7eab0c0d HP |
1587 | return 0; |
1588 | ||
6dbb1796 | 1589 | /* wait for GCed page writeback via META_MAPPING */ |
d4c759ee | 1590 | f2fs_wait_on_block_writeback(fio->sbi, fio->old_blkaddr); |
7eab0c0d HP |
1591 | |
1592 | retry_encrypt: | |
1593 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1594 | PAGE_SIZE, 0, fio->page->index, gfp_flags); | |
1595 | if (!IS_ERR(fio->encrypted_page)) | |
1596 | return 0; | |
1597 | ||
1598 | /* flush pending IOs and wait for a while in the ENOMEM case */ | |
1599 | if (PTR_ERR(fio->encrypted_page) == -ENOMEM) { | |
b9109b0e | 1600 | f2fs_flush_merged_writes(fio->sbi); |
7eab0c0d HP |
1601 | congestion_wait(BLK_RW_ASYNC, HZ/50); |
1602 | gfp_flags |= __GFP_NOFAIL; | |
1603 | goto retry_encrypt; | |
1604 | } | |
1605 | return PTR_ERR(fio->encrypted_page); | |
1606 | } | |
1607 | ||
bb9e3bb8 CY |
1608 | static inline bool check_inplace_update_policy(struct inode *inode, |
1609 | struct f2fs_io_info *fio) | |
7eab0c0d | 1610 | { |
bb9e3bb8 CY |
1611 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
1612 | unsigned int policy = SM_I(sbi)->ipu_policy; | |
7eab0c0d | 1613 | |
bb9e3bb8 CY |
1614 | if (policy & (0x1 << F2FS_IPU_FORCE)) |
1615 | return true; | |
4d57b86d | 1616 | if (policy & (0x1 << F2FS_IPU_SSR) && f2fs_need_SSR(sbi)) |
bb9e3bb8 CY |
1617 | return true; |
1618 | if (policy & (0x1 << F2FS_IPU_UTIL) && | |
1619 | utilization(sbi) > SM_I(sbi)->min_ipu_util) | |
1620 | return true; | |
4d57b86d | 1621 | if (policy & (0x1 << F2FS_IPU_SSR_UTIL) && f2fs_need_SSR(sbi) && |
bb9e3bb8 CY |
1622 | utilization(sbi) > SM_I(sbi)->min_ipu_util) |
1623 | return true; | |
1624 | ||
1625 | /* | |
1626 | * IPU for rewrite async pages | |
1627 | */ | |
1628 | if (policy & (0x1 << F2FS_IPU_ASYNC) && | |
1629 | fio && fio->op == REQ_OP_WRITE && | |
1630 | !(fio->op_flags & REQ_SYNC) && | |
1631 | !f2fs_encrypted_inode(inode)) | |
1632 | return true; | |
1633 | ||
1634 | /* this is only set during fdatasync */ | |
1635 | if (policy & (0x1 << F2FS_IPU_FSYNC) && | |
1636 | is_inode_flag_set(inode, FI_NEED_IPU)) | |
1637 | return true; | |
1638 | ||
1639 | return false; | |
1640 | } | |
1641 | ||
4d57b86d | 1642 | bool f2fs_should_update_inplace(struct inode *inode, struct f2fs_io_info *fio) |
bb9e3bb8 | 1643 | { |
1ad71a27 JK |
1644 | if (f2fs_is_pinned_file(inode)) |
1645 | return true; | |
bb9e3bb8 CY |
1646 | |
1647 | /* if this is cold file, we should overwrite to avoid fragmentation */ | |
1648 | if (file_is_cold(inode)) | |
1649 | return true; | |
1650 | ||
1651 | return check_inplace_update_policy(inode, fio); | |
1652 | } | |
1653 | ||
4d57b86d | 1654 | bool f2fs_should_update_outplace(struct inode *inode, struct f2fs_io_info *fio) |
bb9e3bb8 CY |
1655 | { |
1656 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1657 | ||
1658 | if (test_opt(sbi, LFS)) | |
1659 | return true; | |
1660 | if (S_ISDIR(inode->i_mode)) | |
1661 | return true; | |
1662 | if (f2fs_is_atomic_file(inode)) | |
1663 | return true; | |
1664 | if (fio) { | |
1665 | if (is_cold_data(fio->page)) | |
1666 | return true; | |
1667 | if (IS_ATOMIC_WRITTEN_PAGE(fio->page)) | |
1668 | return true; | |
1669 | } | |
1670 | return false; | |
1671 | } | |
1672 | ||
7eab0c0d HP |
1673 | static inline bool need_inplace_update(struct f2fs_io_info *fio) |
1674 | { | |
1675 | struct inode *inode = fio->page->mapping->host; | |
1676 | ||
4d57b86d | 1677 | if (f2fs_should_update_outplace(inode, fio)) |
7eab0c0d HP |
1678 | return false; |
1679 | ||
4d57b86d | 1680 | return f2fs_should_update_inplace(inode, fio); |
7eab0c0d HP |
1681 | } |
1682 | ||
4d57b86d | 1683 | int f2fs_do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1684 | { |
05ca3632 | 1685 | struct page *page = fio->page; |
eb47b800 | 1686 | struct inode *inode = page->mapping->host; |
eb47b800 | 1687 | struct dnode_of_data dn; |
e959c8f5 HP |
1688 | struct extent_info ei = {0,0,0}; |
1689 | bool ipu_force = false; | |
eb47b800 JK |
1690 | int err = 0; |
1691 | ||
1692 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
e959c8f5 HP |
1693 | if (need_inplace_update(fio) && |
1694 | f2fs_lookup_extent_cache(inode, page->index, &ei)) { | |
1695 | fio->old_blkaddr = ei.blk + page->index - ei.fofs; | |
a817737e | 1696 | |
7b525dd0 | 1697 | if (is_valid_blkaddr(fio->old_blkaddr)) { |
e959c8f5 | 1698 | ipu_force = true; |
cc15620b | 1699 | fio->need_lock = LOCK_DONE; |
e959c8f5 HP |
1700 | goto got_it; |
1701 | } | |
1702 | } | |
279d6df2 | 1703 | |
d29460e5 JK |
1704 | /* Deadlock due to between page->lock and f2fs_lock_op */ |
1705 | if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi)) | |
1706 | return -EAGAIN; | |
279d6df2 | 1707 | |
4d57b86d | 1708 | err = f2fs_get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 | 1709 | if (err) |
279d6df2 | 1710 | goto out; |
eb47b800 | 1711 | |
28bc106b | 1712 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1713 | |
1714 | /* This page is already truncated */ | |
7a9d7548 | 1715 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1716 | ClearPageUptodate(page); |
eb47b800 | 1717 | goto out_writepage; |
2bca1e23 | 1718 | } |
e959c8f5 | 1719 | got_it: |
eb47b800 JK |
1720 | /* |
1721 | * If current allocation needs SSR, | |
1722 | * it had better in-place writes for updated data. | |
1723 | */ | |
7b525dd0 CY |
1724 | if (ipu_force || (is_valid_blkaddr(fio->old_blkaddr) && |
1725 | need_inplace_update(fio))) { | |
cc15620b JK |
1726 | err = encrypt_one_page(fio); |
1727 | if (err) | |
1728 | goto out_writepage; | |
1729 | ||
1730 | set_page_writeback(page); | |
17c50035 | 1731 | ClearPageError(page); |
279d6df2 | 1732 | f2fs_put_dnode(&dn); |
cc15620b | 1733 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 1734 | f2fs_unlock_op(fio->sbi); |
4d57b86d | 1735 | err = f2fs_inplace_write_data(fio); |
7eab0c0d | 1736 | trace_f2fs_do_write_data_page(fio->page, IPU); |
91942321 | 1737 | set_inode_flag(inode, FI_UPDATE_WRITE); |
279d6df2 | 1738 | return err; |
eb47b800 | 1739 | } |
279d6df2 | 1740 | |
cc15620b JK |
1741 | if (fio->need_lock == LOCK_RETRY) { |
1742 | if (!f2fs_trylock_op(fio->sbi)) { | |
1743 | err = -EAGAIN; | |
1744 | goto out_writepage; | |
1745 | } | |
1746 | fio->need_lock = LOCK_REQ; | |
1747 | } | |
1748 | ||
1749 | err = encrypt_one_page(fio); | |
1750 | if (err) | |
1751 | goto out_writepage; | |
1752 | ||
1753 | set_page_writeback(page); | |
17c50035 | 1754 | ClearPageError(page); |
cc15620b | 1755 | |
279d6df2 | 1756 | /* LFS mode write path */ |
4d57b86d | 1757 | f2fs_outplace_write_data(&dn, fio); |
279d6df2 HP |
1758 | trace_f2fs_do_write_data_page(page, OPU); |
1759 | set_inode_flag(inode, FI_APPEND_WRITE); | |
1760 | if (page->index == 0) | |
1761 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1762 | out_writepage: |
1763 | f2fs_put_dnode(&dn); | |
279d6df2 | 1764 | out: |
cc15620b | 1765 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 1766 | f2fs_unlock_op(fio->sbi); |
eb47b800 JK |
1767 | return err; |
1768 | } | |
1769 | ||
d68f735b | 1770 | static int __write_data_page(struct page *page, bool *submitted, |
b0af6d49 CY |
1771 | struct writeback_control *wbc, |
1772 | enum iostat_type io_type) | |
eb47b800 JK |
1773 | { |
1774 | struct inode *inode = page->mapping->host; | |
4081363f | 1775 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1776 | loff_t i_size = i_size_read(inode); |
1777 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1778 | >> PAGE_SHIFT; |
26de9b11 | 1779 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1780 | unsigned offset = 0; |
39936837 | 1781 | bool need_balance_fs = false; |
eb47b800 | 1782 | int err = 0; |
458e6197 | 1783 | struct f2fs_io_info fio = { |
05ca3632 | 1784 | .sbi = sbi, |
39d787be | 1785 | .ino = inode->i_ino, |
458e6197 | 1786 | .type = DATA, |
04d328de | 1787 | .op = REQ_OP_WRITE, |
7637241e | 1788 | .op_flags = wbc_to_write_flags(wbc), |
e959c8f5 | 1789 | .old_blkaddr = NULL_ADDR, |
05ca3632 | 1790 | .page = page, |
4375a336 | 1791 | .encrypted_page = NULL, |
d68f735b | 1792 | .submitted = false, |
cc15620b | 1793 | .need_lock = LOCK_RETRY, |
b0af6d49 | 1794 | .io_type = io_type, |
578c6478 | 1795 | .io_wbc = wbc, |
458e6197 | 1796 | }; |
eb47b800 | 1797 | |
ecda0de3 CY |
1798 | trace_f2fs_writepage(page, DATA); |
1799 | ||
db198ae0 CY |
1800 | /* we should bypass data pages to proceed the kworkder jobs */ |
1801 | if (unlikely(f2fs_cp_error(sbi))) { | |
1802 | mapping_set_error(page->mapping, -EIO); | |
1174abfd CY |
1803 | /* |
1804 | * don't drop any dirty dentry pages for keeping lastest | |
1805 | * directory structure. | |
1806 | */ | |
1807 | if (S_ISDIR(inode->i_mode)) | |
1808 | goto redirty_out; | |
db198ae0 CY |
1809 | goto out; |
1810 | } | |
1811 | ||
0771fcc7 CY |
1812 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
1813 | goto redirty_out; | |
1814 | ||
eb47b800 | 1815 | if (page->index < end_index) |
39936837 | 1816 | goto write; |
eb47b800 JK |
1817 | |
1818 | /* | |
1819 | * If the offset is out-of-range of file size, | |
1820 | * this page does not have to be written to disk. | |
1821 | */ | |
09cbfeaf | 1822 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1823 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1824 | goto out; |
eb47b800 | 1825 | |
09cbfeaf | 1826 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1827 | write: |
1e84371f JK |
1828 | if (f2fs_is_drop_cache(inode)) |
1829 | goto out; | |
e6e5f561 JK |
1830 | /* we should not write 0'th page having journal header */ |
1831 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1832 | (!wbc->for_reclaim && | |
4d57b86d | 1833 | f2fs_available_free_memory(sbi, BASE_CHECK)))) |
1e84371f | 1834 | goto redirty_out; |
eb47b800 | 1835 | |
39936837 | 1836 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1837 | if (S_ISDIR(inode->i_mode)) { |
cc15620b | 1838 | fio.need_lock = LOCK_DONE; |
4d57b86d | 1839 | err = f2fs_do_write_data_page(&fio); |
8618b881 JK |
1840 | goto done; |
1841 | } | |
9ffe0fb5 | 1842 | |
8618b881 | 1843 | if (!wbc->for_reclaim) |
39936837 | 1844 | need_balance_fs = true; |
7f3037a5 | 1845 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1846 | goto redirty_out; |
ef095d19 JK |
1847 | else |
1848 | set_inode_flag(inode, FI_HOT_DATA); | |
eb47b800 | 1849 | |
b3d208f9 | 1850 | err = -EAGAIN; |
dd7b2333 | 1851 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 | 1852 | err = f2fs_write_inline_data(inode, page); |
dd7b2333 YH |
1853 | if (!err) |
1854 | goto out; | |
1855 | } | |
279d6df2 | 1856 | |
cc15620b | 1857 | if (err == -EAGAIN) { |
4d57b86d | 1858 | err = f2fs_do_write_data_page(&fio); |
cc15620b JK |
1859 | if (err == -EAGAIN) { |
1860 | fio.need_lock = LOCK_REQ; | |
4d57b86d | 1861 | err = f2fs_do_write_data_page(&fio); |
cc15620b JK |
1862 | } |
1863 | } | |
a0d00fad | 1864 | |
eb449797 CY |
1865 | if (err) { |
1866 | file_set_keep_isize(inode); | |
1867 | } else { | |
1868 | down_write(&F2FS_I(inode)->i_sem); | |
1869 | if (F2FS_I(inode)->last_disk_size < psize) | |
1870 | F2FS_I(inode)->last_disk_size = psize; | |
1871 | up_write(&F2FS_I(inode)->i_sem); | |
1872 | } | |
279d6df2 | 1873 | |
8618b881 JK |
1874 | done: |
1875 | if (err && err != -ENOENT) | |
1876 | goto redirty_out; | |
eb47b800 | 1877 | |
39936837 | 1878 | out: |
a7ffdbe2 | 1879 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1880 | if (err) |
1881 | ClearPageUptodate(page); | |
0c3a5797 CY |
1882 | |
1883 | if (wbc->for_reclaim) { | |
b9109b0e | 1884 | f2fs_submit_merged_write_cond(sbi, inode, 0, page->index, DATA); |
ef095d19 | 1885 | clear_inode_flag(inode, FI_HOT_DATA); |
4d57b86d | 1886 | f2fs_remove_dirty_inode(inode); |
d68f735b | 1887 | submitted = NULL; |
0c3a5797 CY |
1888 | } |
1889 | ||
eb47b800 | 1890 | unlock_page(page); |
a7881893 JK |
1891 | if (!S_ISDIR(inode->i_mode)) |
1892 | f2fs_balance_fs(sbi, need_balance_fs); | |
0c3a5797 | 1893 | |
d68f735b | 1894 | if (unlikely(f2fs_cp_error(sbi))) { |
b9109b0e | 1895 | f2fs_submit_merged_write(sbi, DATA); |
d68f735b JK |
1896 | submitted = NULL; |
1897 | } | |
1898 | ||
1899 | if (submitted) | |
1900 | *submitted = fio.submitted; | |
0c3a5797 | 1901 | |
eb47b800 JK |
1902 | return 0; |
1903 | ||
eb47b800 | 1904 | redirty_out: |
76f60268 | 1905 | redirty_page_for_writepage(wbc, page); |
5b19d284 JK |
1906 | /* |
1907 | * pageout() in MM traslates EAGAIN, so calls handle_write_error() | |
1908 | * -> mapping_set_error() -> set_bit(AS_EIO, ...). | |
1909 | * file_write_and_wait_range() will see EIO error, which is critical | |
1910 | * to return value of fsync() followed by atomic_write failure to user. | |
1911 | */ | |
1912 | if (!err || wbc->for_reclaim) | |
0002b61b | 1913 | return AOP_WRITEPAGE_ACTIVATE; |
b230e6ca JK |
1914 | unlock_page(page); |
1915 | return err; | |
fa9150a8 NJ |
1916 | } |
1917 | ||
f566bae8 JK |
1918 | static int f2fs_write_data_page(struct page *page, |
1919 | struct writeback_control *wbc) | |
1920 | { | |
b0af6d49 | 1921 | return __write_data_page(page, NULL, wbc, FS_DATA_IO); |
f566bae8 JK |
1922 | } |
1923 | ||
8f46dcae CY |
1924 | /* |
1925 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1926 | * The major change is making write step of cold data page separately from | |
1927 | * warm/hot data page. | |
1928 | */ | |
1929 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b0af6d49 CY |
1930 | struct writeback_control *wbc, |
1931 | enum iostat_type io_type) | |
8f46dcae CY |
1932 | { |
1933 | int ret = 0; | |
1934 | int done = 0; | |
1935 | struct pagevec pvec; | |
c29fd0c0 | 1936 | struct f2fs_sb_info *sbi = F2FS_M_SB(mapping); |
8f46dcae CY |
1937 | int nr_pages; |
1938 | pgoff_t uninitialized_var(writeback_index); | |
1939 | pgoff_t index; | |
1940 | pgoff_t end; /* Inclusive */ | |
1941 | pgoff_t done_index; | |
942fd319 | 1942 | pgoff_t last_idx = ULONG_MAX; |
8f46dcae CY |
1943 | int cycled; |
1944 | int range_whole = 0; | |
1945 | int tag; | |
8f46dcae | 1946 | |
86679820 | 1947 | pagevec_init(&pvec); |
46ae957f | 1948 | |
ef095d19 JK |
1949 | if (get_dirty_pages(mapping->host) <= |
1950 | SM_I(F2FS_M_SB(mapping))->min_hot_blocks) | |
1951 | set_inode_flag(mapping->host, FI_HOT_DATA); | |
1952 | else | |
1953 | clear_inode_flag(mapping->host, FI_HOT_DATA); | |
1954 | ||
8f46dcae CY |
1955 | if (wbc->range_cyclic) { |
1956 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1957 | index = writeback_index; | |
1958 | if (index == 0) | |
1959 | cycled = 1; | |
1960 | else | |
1961 | cycled = 0; | |
1962 | end = -1; | |
1963 | } else { | |
09cbfeaf KS |
1964 | index = wbc->range_start >> PAGE_SHIFT; |
1965 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1966 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1967 | range_whole = 1; | |
1968 | cycled = 1; /* ignore range_cyclic tests */ | |
1969 | } | |
1970 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1971 | tag = PAGECACHE_TAG_TOWRITE; | |
1972 | else | |
1973 | tag = PAGECACHE_TAG_DIRTY; | |
1974 | retry: | |
1975 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1976 | tag_pages_for_writeback(mapping, index, end); | |
1977 | done_index = index; | |
1978 | while (!done && (index <= end)) { | |
1979 | int i; | |
1980 | ||
69c4f35d | 1981 | nr_pages = pagevec_lookup_range_tag(&pvec, mapping, &index, end, |
67fd707f | 1982 | tag); |
8f46dcae CY |
1983 | if (nr_pages == 0) |
1984 | break; | |
1985 | ||
1986 | for (i = 0; i < nr_pages; i++) { | |
1987 | struct page *page = pvec.pages[i]; | |
d68f735b | 1988 | bool submitted = false; |
8f46dcae | 1989 | |
f8de4331 | 1990 | /* give a priority to WB_SYNC threads */ |
c29fd0c0 | 1991 | if (atomic_read(&sbi->wb_sync_req[DATA]) && |
f8de4331 CY |
1992 | wbc->sync_mode == WB_SYNC_NONE) { |
1993 | done = 1; | |
1994 | break; | |
1995 | } | |
1996 | ||
8f46dcae | 1997 | done_index = page->index; |
d29460e5 | 1998 | retry_write: |
8f46dcae CY |
1999 | lock_page(page); |
2000 | ||
2001 | if (unlikely(page->mapping != mapping)) { | |
2002 | continue_unlock: | |
2003 | unlock_page(page); | |
2004 | continue; | |
2005 | } | |
2006 | ||
2007 | if (!PageDirty(page)) { | |
2008 | /* someone wrote it for us */ | |
2009 | goto continue_unlock; | |
2010 | } | |
2011 | ||
8f46dcae CY |
2012 | if (PageWriteback(page)) { |
2013 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
2014 | f2fs_wait_on_page_writeback(page, |
2015 | DATA, true); | |
8f46dcae CY |
2016 | else |
2017 | goto continue_unlock; | |
2018 | } | |
2019 | ||
2020 | BUG_ON(PageWriteback(page)); | |
2021 | if (!clear_page_dirty_for_io(page)) | |
2022 | goto continue_unlock; | |
2023 | ||
b0af6d49 | 2024 | ret = __write_data_page(page, &submitted, wbc, io_type); |
8f46dcae | 2025 | if (unlikely(ret)) { |
0002b61b CY |
2026 | /* |
2027 | * keep nr_to_write, since vfs uses this to | |
2028 | * get # of written pages. | |
2029 | */ | |
2030 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
2031 | unlock_page(page); | |
2032 | ret = 0; | |
2033 | continue; | |
d29460e5 JK |
2034 | } else if (ret == -EAGAIN) { |
2035 | ret = 0; | |
2036 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
2037 | cond_resched(); | |
2038 | congestion_wait(BLK_RW_ASYNC, | |
2039 | HZ/50); | |
2040 | goto retry_write; | |
2041 | } | |
2042 | continue; | |
0002b61b | 2043 | } |
b230e6ca JK |
2044 | done_index = page->index + 1; |
2045 | done = 1; | |
2046 | break; | |
d68f735b | 2047 | } else if (submitted) { |
942fd319 | 2048 | last_idx = page->index; |
8f46dcae CY |
2049 | } |
2050 | ||
f8de4331 | 2051 | if (--wbc->nr_to_write <= 0 && |
687de7f1 | 2052 | wbc->sync_mode == WB_SYNC_NONE) { |
8f46dcae CY |
2053 | done = 1; |
2054 | break; | |
2055 | } | |
2056 | } | |
2057 | pagevec_release(&pvec); | |
2058 | cond_resched(); | |
2059 | } | |
2060 | ||
8f46dcae CY |
2061 | if (!cycled && !done) { |
2062 | cycled = 1; | |
2063 | index = 0; | |
2064 | end = writeback_index - 1; | |
2065 | goto retry; | |
2066 | } | |
2067 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
2068 | mapping->writeback_index = done_index; | |
2069 | ||
942fd319 | 2070 | if (last_idx != ULONG_MAX) |
b9109b0e JK |
2071 | f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host, |
2072 | 0, last_idx, DATA); | |
6ca56ca4 | 2073 | |
8f46dcae CY |
2074 | return ret; |
2075 | } | |
2076 | ||
fc99fe27 | 2077 | static int __f2fs_write_data_pages(struct address_space *mapping, |
b0af6d49 CY |
2078 | struct writeback_control *wbc, |
2079 | enum iostat_type io_type) | |
eb47b800 JK |
2080 | { |
2081 | struct inode *inode = mapping->host; | |
4081363f | 2082 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 2083 | struct blk_plug plug; |
eb47b800 | 2084 | int ret; |
eb47b800 | 2085 | |
cfb185a1 | 2086 | /* deal with chardevs and other special file */ |
2087 | if (!mapping->a_ops->writepage) | |
2088 | return 0; | |
2089 | ||
6a290544 CY |
2090 | /* skip writing if there is no dirty page in this inode */ |
2091 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
2092 | return 0; | |
2093 | ||
0771fcc7 CY |
2094 | /* during POR, we don't need to trigger writepage at all. */ |
2095 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
2096 | goto skip_write; | |
2097 | ||
a1257023 JK |
2098 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
2099 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
4d57b86d | 2100 | f2fs_available_free_memory(sbi, DIRTY_DENTS)) |
a1257023 JK |
2101 | goto skip_write; |
2102 | ||
d323d005 | 2103 | /* skip writing during file defragment */ |
91942321 | 2104 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
2105 | goto skip_write; |
2106 | ||
d31c7c3f YH |
2107 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
2108 | ||
687de7f1 JK |
2109 | /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */ |
2110 | if (wbc->sync_mode == WB_SYNC_ALL) | |
c29fd0c0 CY |
2111 | atomic_inc(&sbi->wb_sync_req[DATA]); |
2112 | else if (atomic_read(&sbi->wb_sync_req[DATA])) | |
687de7f1 JK |
2113 | goto skip_write; |
2114 | ||
9dfa1baf | 2115 | blk_start_plug(&plug); |
b0af6d49 | 2116 | ret = f2fs_write_cache_pages(mapping, wbc, io_type); |
9dfa1baf | 2117 | blk_finish_plug(&plug); |
687de7f1 JK |
2118 | |
2119 | if (wbc->sync_mode == WB_SYNC_ALL) | |
c29fd0c0 | 2120 | atomic_dec(&sbi->wb_sync_req[DATA]); |
28ea6162 JK |
2121 | /* |
2122 | * if some pages were truncated, we cannot guarantee its mapping->host | |
2123 | * to detect pending bios. | |
2124 | */ | |
458e6197 | 2125 | |
4d57b86d | 2126 | f2fs_remove_dirty_inode(inode); |
eb47b800 | 2127 | return ret; |
d3baf95d JK |
2128 | |
2129 | skip_write: | |
a7ffdbe2 | 2130 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 2131 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 2132 | return 0; |
eb47b800 JK |
2133 | } |
2134 | ||
b0af6d49 CY |
2135 | static int f2fs_write_data_pages(struct address_space *mapping, |
2136 | struct writeback_control *wbc) | |
2137 | { | |
2138 | struct inode *inode = mapping->host; | |
2139 | ||
2140 | return __f2fs_write_data_pages(mapping, wbc, | |
2141 | F2FS_I(inode)->cp_task == current ? | |
2142 | FS_CP_DATA_IO : FS_DATA_IO); | |
2143 | } | |
2144 | ||
3aab8f82 CY |
2145 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
2146 | { | |
2147 | struct inode *inode = mapping->host; | |
819d9153 | 2148 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 2149 | |
819d9153 | 2150 | if (to > i_size) { |
5a3a2d83 | 2151 | down_write(&F2FS_I(inode)->i_mmap_sem); |
819d9153 | 2152 | truncate_pagecache(inode, i_size); |
4d57b86d | 2153 | f2fs_truncate_blocks(inode, i_size, true); |
5a3a2d83 | 2154 | up_write(&F2FS_I(inode)->i_mmap_sem); |
3aab8f82 CY |
2155 | } |
2156 | } | |
2157 | ||
2aadac08 JK |
2158 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
2159 | struct page *page, loff_t pos, unsigned len, | |
2160 | block_t *blk_addr, bool *node_changed) | |
2161 | { | |
2162 | struct inode *inode = page->mapping->host; | |
2163 | pgoff_t index = page->index; | |
2164 | struct dnode_of_data dn; | |
2165 | struct page *ipage; | |
b4d07a3e | 2166 | bool locked = false; |
e15882b6 | 2167 | struct extent_info ei = {0,0,0}; |
2aadac08 JK |
2168 | int err = 0; |
2169 | ||
24b84912 JK |
2170 | /* |
2171 | * we already allocated all the blocks, so we don't need to get | |
2172 | * the block addresses when there is no need to fill the page. | |
2173 | */ | |
dc91de78 JK |
2174 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE && |
2175 | !is_inode_flag_set(inode, FI_NO_PREALLOC)) | |
24b84912 JK |
2176 | return 0; |
2177 | ||
b4d07a3e | 2178 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 2179 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
59c9081b | 2180 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true); |
b4d07a3e JK |
2181 | locked = true; |
2182 | } | |
2183 | restart: | |
2aadac08 | 2184 | /* check inline_data */ |
4d57b86d | 2185 | ipage = f2fs_get_node_page(sbi, inode->i_ino); |
2aadac08 JK |
2186 | if (IS_ERR(ipage)) { |
2187 | err = PTR_ERR(ipage); | |
2188 | goto unlock_out; | |
2189 | } | |
2190 | ||
2191 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
2192 | ||
2193 | if (f2fs_has_inline_data(inode)) { | |
f2470371 | 2194 | if (pos + len <= MAX_INLINE_DATA(inode)) { |
4d57b86d | 2195 | f2fs_do_read_inline_data(page, ipage); |
91942321 | 2196 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
2197 | if (inode->i_nlink) |
2198 | set_inline_node(ipage); | |
2aadac08 JK |
2199 | } else { |
2200 | err = f2fs_convert_inline_page(&dn, page); | |
2201 | if (err) | |
b4d07a3e JK |
2202 | goto out; |
2203 | if (dn.data_blkaddr == NULL_ADDR) | |
2204 | err = f2fs_get_block(&dn, index); | |
2205 | } | |
2206 | } else if (locked) { | |
2207 | err = f2fs_get_block(&dn, index); | |
2208 | } else { | |
2209 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
2210 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
2211 | } else { | |
b4d07a3e | 2212 | /* hole case */ |
4d57b86d | 2213 | err = f2fs_get_dnode_of_data(&dn, index, LOOKUP_NODE); |
4da7bf5a | 2214 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e | 2215 | f2fs_put_dnode(&dn); |
59c9081b YH |
2216 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, |
2217 | true); | |
b4d07a3e JK |
2218 | locked = true; |
2219 | goto restart; | |
2220 | } | |
2aadac08 JK |
2221 | } |
2222 | } | |
b4d07a3e | 2223 | |
2aadac08 JK |
2224 | /* convert_inline_page can make node_changed */ |
2225 | *blk_addr = dn.data_blkaddr; | |
2226 | *node_changed = dn.node_changed; | |
b4d07a3e | 2227 | out: |
2aadac08 JK |
2228 | f2fs_put_dnode(&dn); |
2229 | unlock_out: | |
b4d07a3e | 2230 | if (locked) |
59c9081b | 2231 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false); |
2aadac08 JK |
2232 | return err; |
2233 | } | |
2234 | ||
eb47b800 JK |
2235 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
2236 | loff_t pos, unsigned len, unsigned flags, | |
2237 | struct page **pagep, void **fsdata) | |
2238 | { | |
2239 | struct inode *inode = mapping->host; | |
4081363f | 2240 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 2241 | struct page *page = NULL; |
09cbfeaf | 2242 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
a2e2e76b | 2243 | bool need_balance = false, drop_atomic = false; |
2aadac08 | 2244 | block_t blkaddr = NULL_ADDR; |
eb47b800 JK |
2245 | int err = 0; |
2246 | ||
62aed044 CY |
2247 | trace_f2fs_write_begin(inode, pos, len, flags); |
2248 | ||
57864ae5 | 2249 | if (f2fs_is_atomic_file(inode) && |
4d57b86d | 2250 | !f2fs_available_free_memory(sbi, INMEM_PAGES)) { |
57864ae5 | 2251 | err = -ENOMEM; |
a2e2e76b | 2252 | drop_atomic = true; |
57864ae5 JK |
2253 | goto fail; |
2254 | } | |
2255 | ||
5f727395 JK |
2256 | /* |
2257 | * We should check this at this moment to avoid deadlock on inode page | |
2258 | * and #0 page. The locking rule for inline_data conversion should be: | |
2259 | * lock_page(page #0) -> lock_page(inode_page) | |
2260 | */ | |
2261 | if (index != 0) { | |
2262 | err = f2fs_convert_inline_inode(inode); | |
2263 | if (err) | |
2264 | goto fail; | |
2265 | } | |
afcb7ca0 | 2266 | repeat: |
86d54795 JK |
2267 | /* |
2268 | * Do not use grab_cache_page_write_begin() to avoid deadlock due to | |
2269 | * wait_for_stable_page. Will wait that below with our IO control. | |
2270 | */ | |
01eccef7 | 2271 | page = f2fs_pagecache_get_page(mapping, index, |
86d54795 | 2272 | FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS); |
3aab8f82 CY |
2273 | if (!page) { |
2274 | err = -ENOMEM; | |
2275 | goto fail; | |
2276 | } | |
d5f66990 | 2277 | |
eb47b800 JK |
2278 | *pagep = page; |
2279 | ||
2aadac08 JK |
2280 | err = prepare_write_begin(sbi, page, pos, len, |
2281 | &blkaddr, &need_balance); | |
9ba69cf9 | 2282 | if (err) |
2aadac08 | 2283 | goto fail; |
9ba69cf9 | 2284 | |
7f3037a5 | 2285 | if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) { |
2a340760 | 2286 | unlock_page(page); |
2c4db1a6 | 2287 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
2288 | lock_page(page); |
2289 | if (page->mapping != mapping) { | |
2290 | /* The page got truncated from under us */ | |
2291 | f2fs_put_page(page, 1); | |
2292 | goto repeat; | |
2293 | } | |
2294 | } | |
2295 | ||
fec1d657 | 2296 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 2297 | |
6dbb1796 EB |
2298 | /* wait for GCed page writeback via META_MAPPING */ |
2299 | if (f2fs_post_read_required(inode)) | |
d4c759ee | 2300 | f2fs_wait_on_block_writeback(sbi, blkaddr); |
08b39fbd | 2301 | |
649d7df2 JK |
2302 | if (len == PAGE_SIZE || PageUptodate(page)) |
2303 | return 0; | |
eb47b800 | 2304 | |
746e2403 YH |
2305 | if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) { |
2306 | zero_user_segment(page, len, PAGE_SIZE); | |
2307 | return 0; | |
2308 | } | |
2309 | ||
2aadac08 | 2310 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 2311 | zero_user_segment(page, 0, PAGE_SIZE); |
649d7df2 | 2312 | SetPageUptodate(page); |
eb47b800 | 2313 | } else { |
13ba41e3 JK |
2314 | err = f2fs_submit_page_read(inode, page, blkaddr); |
2315 | if (err) | |
78682f79 | 2316 | goto fail; |
d54c795b | 2317 | |
393ff91f | 2318 | lock_page(page); |
6bacf52f | 2319 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
2320 | f2fs_put_page(page, 1); |
2321 | goto repeat; | |
eb47b800 | 2322 | } |
1563ac75 CY |
2323 | if (unlikely(!PageUptodate(page))) { |
2324 | err = -EIO; | |
2325 | goto fail; | |
4375a336 | 2326 | } |
eb47b800 | 2327 | } |
eb47b800 | 2328 | return 0; |
9ba69cf9 | 2329 | |
3aab8f82 | 2330 | fail: |
86531d6b | 2331 | f2fs_put_page(page, 1); |
3aab8f82 | 2332 | f2fs_write_failed(mapping, pos + len); |
a2e2e76b | 2333 | if (drop_atomic) |
4d57b86d | 2334 | f2fs_drop_inmem_pages_all(sbi, false); |
3aab8f82 | 2335 | return err; |
eb47b800 JK |
2336 | } |
2337 | ||
a1dd3c13 JK |
2338 | static int f2fs_write_end(struct file *file, |
2339 | struct address_space *mapping, | |
2340 | loff_t pos, unsigned len, unsigned copied, | |
2341 | struct page *page, void *fsdata) | |
2342 | { | |
2343 | struct inode *inode = page->mapping->host; | |
2344 | ||
dfb2bf38 CY |
2345 | trace_f2fs_write_end(inode, pos, len, copied); |
2346 | ||
649d7df2 JK |
2347 | /* |
2348 | * This should be come from len == PAGE_SIZE, and we expect copied | |
2349 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
2350 | * let generic_perform_write() try to copy data again through copied=0. | |
2351 | */ | |
2352 | if (!PageUptodate(page)) { | |
746e2403 | 2353 | if (unlikely(copied != len)) |
649d7df2 JK |
2354 | copied = 0; |
2355 | else | |
2356 | SetPageUptodate(page); | |
2357 | } | |
2358 | if (!copied) | |
2359 | goto unlock_out; | |
2360 | ||
34ba94ba | 2361 | set_page_dirty(page); |
a1dd3c13 | 2362 | |
fc9581c8 JK |
2363 | if (pos + copied > i_size_read(inode)) |
2364 | f2fs_i_size_write(inode, pos + copied); | |
649d7df2 | 2365 | unlock_out: |
3024c9a1 | 2366 | f2fs_put_page(page, 1); |
d0239e1b | 2367 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
2368 | return copied; |
2369 | } | |
2370 | ||
6f673763 OS |
2371 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
2372 | loff_t offset) | |
944fcfc1 JK |
2373 | { |
2374 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 2375 | |
944fcfc1 JK |
2376 | if (offset & blocksize_mask) |
2377 | return -EINVAL; | |
2378 | ||
5b46f25d AV |
2379 | if (iov_iter_alignment(iter) & blocksize_mask) |
2380 | return -EINVAL; | |
2381 | ||
944fcfc1 JK |
2382 | return 0; |
2383 | } | |
2384 | ||
c8b8e32d | 2385 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 2386 | { |
b439b103 | 2387 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 | 2388 | struct inode *inode = mapping->host; |
0cdd3195 | 2389 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
3aab8f82 | 2390 | size_t count = iov_iter_count(iter); |
c8b8e32d | 2391 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 2392 | int rw = iov_iter_rw(iter); |
3aab8f82 | 2393 | int err; |
0cdd3195 | 2394 | enum rw_hint hint = iocb->ki_hint; |
63189b78 | 2395 | int whint_mode = F2FS_OPTION(sbi).whint_mode; |
944fcfc1 | 2396 | |
b439b103 | 2397 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
2398 | if (err) |
2399 | return err; | |
9ffe0fb5 | 2400 | |
b91050a8 | 2401 | if (f2fs_force_buffered_io(inode, rw)) |
36abef4e | 2402 | return 0; |
fcc85a4d | 2403 | |
5302fb00 | 2404 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 2405 | |
0cdd3195 HL |
2406 | if (rw == WRITE && whint_mode == WHINT_MODE_OFF) |
2407 | iocb->ki_hint = WRITE_LIFE_NOT_SET; | |
2408 | ||
b2532c69 | 2409 | if (!down_read_trylock(&F2FS_I(inode)->i_gc_rwsem[rw])) { |
b91050a8 HL |
2410 | if (iocb->ki_flags & IOCB_NOWAIT) { |
2411 | iocb->ki_hint = hint; | |
2412 | err = -EAGAIN; | |
2413 | goto out; | |
2414 | } | |
b2532c69 | 2415 | down_read(&F2FS_I(inode)->i_gc_rwsem[rw]); |
b91050a8 HL |
2416 | } |
2417 | ||
c8b8e32d | 2418 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
b2532c69 | 2419 | up_read(&F2FS_I(inode)->i_gc_rwsem[rw]); |
82e0a5aa CY |
2420 | |
2421 | if (rw == WRITE) { | |
0cdd3195 HL |
2422 | if (whint_mode == WHINT_MODE_OFF) |
2423 | iocb->ki_hint = hint; | |
b0af6d49 CY |
2424 | if (err > 0) { |
2425 | f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO, | |
2426 | err); | |
91942321 | 2427 | set_inode_flag(inode, FI_UPDATE_WRITE); |
b0af6d49 | 2428 | } else if (err < 0) { |
6bfc4919 | 2429 | f2fs_write_failed(mapping, offset + count); |
b0af6d49 | 2430 | } |
6bfc4919 | 2431 | } |
70407fad | 2432 | |
b91050a8 | 2433 | out: |
5302fb00 | 2434 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 2435 | |
3aab8f82 | 2436 | return err; |
eb47b800 JK |
2437 | } |
2438 | ||
487261f3 CY |
2439 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
2440 | unsigned int length) | |
eb47b800 JK |
2441 | { |
2442 | struct inode *inode = page->mapping->host; | |
487261f3 | 2443 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 2444 | |
487261f3 | 2445 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 2446 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
2447 | return; |
2448 | ||
487261f3 | 2449 | if (PageDirty(page)) { |
933439c8 | 2450 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 2451 | dec_page_count(sbi, F2FS_DIRTY_META); |
933439c8 | 2452 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 2453 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
933439c8 | 2454 | } else { |
487261f3 | 2455 | inode_dec_dirty_pages(inode); |
4d57b86d | 2456 | f2fs_remove_dirty_inode(inode); |
933439c8 | 2457 | } |
487261f3 | 2458 | } |
decd36b6 CY |
2459 | |
2460 | /* This is atomic written page, keep Private */ | |
2461 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
4d57b86d | 2462 | return f2fs_drop_inmem_page(inode, page); |
decd36b6 | 2463 | |
23dc974e | 2464 | set_page_private(page, 0); |
eb47b800 JK |
2465 | ClearPagePrivate(page); |
2466 | } | |
2467 | ||
487261f3 | 2468 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 2469 | { |
f68daeeb JK |
2470 | /* If this is dirty page, keep PagePrivate */ |
2471 | if (PageDirty(page)) | |
2472 | return 0; | |
2473 | ||
decd36b6 CY |
2474 | /* This is atomic written page, keep Private */ |
2475 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
2476 | return 0; | |
2477 | ||
23dc974e | 2478 | set_page_private(page, 0); |
eb47b800 | 2479 | ClearPagePrivate(page); |
c3850aa1 | 2480 | return 1; |
eb47b800 JK |
2481 | } |
2482 | ||
2483 | static int f2fs_set_data_page_dirty(struct page *page) | |
2484 | { | |
2485 | struct address_space *mapping = page->mapping; | |
2486 | struct inode *inode = mapping->host; | |
2487 | ||
26c6b887 JK |
2488 | trace_f2fs_set_page_dirty(page, DATA); |
2489 | ||
237c0790 JK |
2490 | if (!PageUptodate(page)) |
2491 | SetPageUptodate(page); | |
34ba94ba | 2492 | |
5fe45743 | 2493 | if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) { |
decd36b6 | 2494 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
4d57b86d | 2495 | f2fs_register_inmem_page(inode, page); |
decd36b6 CY |
2496 | return 1; |
2497 | } | |
2498 | /* | |
2499 | * Previously, this page has been registered, we just | |
2500 | * return here. | |
2501 | */ | |
2502 | return 0; | |
34ba94ba JK |
2503 | } |
2504 | ||
eb47b800 | 2505 | if (!PageDirty(page)) { |
b87078ad | 2506 | __set_page_dirty_nobuffers(page); |
4d57b86d | 2507 | f2fs_update_dirty_page(inode, page); |
eb47b800 JK |
2508 | return 1; |
2509 | } | |
2510 | return 0; | |
2511 | } | |
2512 | ||
c01e54b7 JK |
2513 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
2514 | { | |
454ae7e5 CY |
2515 | struct inode *inode = mapping->host; |
2516 | ||
1d373a0e JK |
2517 | if (f2fs_has_inline_data(inode)) |
2518 | return 0; | |
2519 | ||
2520 | /* make sure allocating whole blocks */ | |
2521 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
2522 | filemap_write_and_wait(mapping); | |
2523 | ||
e2b4e2bc | 2524 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
2525 | } |
2526 | ||
5b7a487c WG |
2527 | #ifdef CONFIG_MIGRATION |
2528 | #include <linux/migrate.h> | |
2529 | ||
2530 | int f2fs_migrate_page(struct address_space *mapping, | |
2531 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
2532 | { | |
2533 | int rc, extra_count; | |
2534 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
2535 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
2536 | ||
2537 | BUG_ON(PageWriteback(page)); | |
2538 | ||
2539 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
ff1048e7 JK |
2540 | if (atomic_written) { |
2541 | if (mode != MIGRATE_SYNC) | |
2542 | return -EBUSY; | |
2543 | if (!mutex_trylock(&fi->inmem_lock)) | |
2544 | return -EAGAIN; | |
2545 | } | |
5b7a487c WG |
2546 | |
2547 | /* | |
2548 | * A reference is expected if PagePrivate set when move mapping, | |
2549 | * however F2FS breaks this for maintaining dirty page counts when | |
2550 | * truncating pages. So here adjusting the 'extra_count' make it work. | |
2551 | */ | |
2552 | extra_count = (atomic_written ? 1 : 0) - page_has_private(page); | |
2553 | rc = migrate_page_move_mapping(mapping, newpage, | |
2554 | page, NULL, mode, extra_count); | |
2555 | if (rc != MIGRATEPAGE_SUCCESS) { | |
2556 | if (atomic_written) | |
2557 | mutex_unlock(&fi->inmem_lock); | |
2558 | return rc; | |
2559 | } | |
2560 | ||
2561 | if (atomic_written) { | |
2562 | struct inmem_pages *cur; | |
2563 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
2564 | if (cur->page == page) { | |
2565 | cur->page = newpage; | |
2566 | break; | |
2567 | } | |
2568 | mutex_unlock(&fi->inmem_lock); | |
2569 | put_page(page); | |
2570 | get_page(newpage); | |
2571 | } | |
2572 | ||
2573 | if (PagePrivate(page)) | |
2574 | SetPagePrivate(newpage); | |
2575 | set_page_private(newpage, page_private(page)); | |
2576 | ||
2916ecc0 JG |
2577 | if (mode != MIGRATE_SYNC_NO_COPY) |
2578 | migrate_page_copy(newpage, page); | |
2579 | else | |
2580 | migrate_page_states(newpage, page); | |
5b7a487c WG |
2581 | |
2582 | return MIGRATEPAGE_SUCCESS; | |
2583 | } | |
2584 | #endif | |
2585 | ||
eb47b800 JK |
2586 | const struct address_space_operations f2fs_dblock_aops = { |
2587 | .readpage = f2fs_read_data_page, | |
2588 | .readpages = f2fs_read_data_pages, | |
2589 | .writepage = f2fs_write_data_page, | |
2590 | .writepages = f2fs_write_data_pages, | |
2591 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 2592 | .write_end = f2fs_write_end, |
eb47b800 | 2593 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
2594 | .invalidatepage = f2fs_invalidate_page, |
2595 | .releasepage = f2fs_release_page, | |
eb47b800 | 2596 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 2597 | .bmap = f2fs_bmap, |
5b7a487c WG |
2598 | #ifdef CONFIG_MIGRATION |
2599 | .migratepage = f2fs_migrate_page, | |
2600 | #endif | |
eb47b800 | 2601 | }; |
6dbb1796 | 2602 | |
4d57b86d | 2603 | void f2fs_clear_radix_tree_dirty_tag(struct page *page) |
aec2f729 CY |
2604 | { |
2605 | struct address_space *mapping = page_mapping(page); | |
2606 | unsigned long flags; | |
2607 | ||
2608 | xa_lock_irqsave(&mapping->i_pages, flags); | |
2609 | radix_tree_tag_clear(&mapping->i_pages, page_index(page), | |
2610 | PAGECACHE_TAG_DIRTY); | |
2611 | xa_unlock_irqrestore(&mapping->i_pages, flags); | |
2612 | } | |
2613 | ||
6dbb1796 EB |
2614 | int __init f2fs_init_post_read_processing(void) |
2615 | { | |
2616 | bio_post_read_ctx_cache = KMEM_CACHE(bio_post_read_ctx, 0); | |
2617 | if (!bio_post_read_ctx_cache) | |
2618 | goto fail; | |
2619 | bio_post_read_ctx_pool = | |
2620 | mempool_create_slab_pool(NUM_PREALLOC_POST_READ_CTXS, | |
2621 | bio_post_read_ctx_cache); | |
2622 | if (!bio_post_read_ctx_pool) | |
2623 | goto fail_free_cache; | |
2624 | return 0; | |
2625 | ||
2626 | fail_free_cache: | |
2627 | kmem_cache_destroy(bio_post_read_ctx_cache); | |
2628 | fail: | |
2629 | return -ENOMEM; | |
2630 | } | |
2631 | ||
2632 | void __exit f2fs_destroy_post_read_processing(void) | |
2633 | { | |
2634 | mempool_destroy(bio_post_read_ctx_pool); | |
2635 | kmem_cache_destroy(bio_post_read_ctx_cache); | |
2636 | } |