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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> |
fe76b796 JK |
22 | #include <linux/mm.h> |
23 | #include <linux/memcontrol.h> | |
f1e88660 | 24 | #include <linux/cleancache.h> |
174cd4b1 | 25 | #include <linux/sched/signal.h> |
eb47b800 JK |
26 | |
27 | #include "f2fs.h" | |
28 | #include "node.h" | |
29 | #include "segment.h" | |
db9f7c1a | 30 | #include "trace.h" |
848753aa | 31 | #include <trace/events/f2fs.h> |
eb47b800 | 32 | |
36951b38 CY |
33 | static bool __is_cp_guaranteed(struct page *page) |
34 | { | |
35 | struct address_space *mapping = page->mapping; | |
36 | struct inode *inode; | |
37 | struct f2fs_sb_info *sbi; | |
38 | ||
39 | if (!mapping) | |
40 | return false; | |
41 | ||
42 | inode = mapping->host; | |
43 | sbi = F2FS_I_SB(inode); | |
44 | ||
45 | if (inode->i_ino == F2FS_META_INO(sbi) || | |
46 | inode->i_ino == F2FS_NODE_INO(sbi) || | |
47 | S_ISDIR(inode->i_mode) || | |
48 | is_cold_data(page)) | |
49 | return true; | |
50 | return false; | |
51 | } | |
52 | ||
4246a0b6 | 53 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 54 | { |
f568849e LT |
55 | struct bio_vec *bvec; |
56 | int i; | |
93dfe2ac | 57 | |
8b038c70 | 58 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
55523519 CY |
59 | if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) { |
60 | f2fs_show_injection_info(FAULT_IO); | |
4e4cbee9 | 61 | bio->bi_status = BLK_STS_IOERR; |
55523519 | 62 | } |
8b038c70 CY |
63 | #endif |
64 | ||
4375a336 | 65 | if (f2fs_bio_encrypted(bio)) { |
4e4cbee9 | 66 | if (bio->bi_status) { |
0b81d077 | 67 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 68 | } else { |
0b81d077 | 69 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
70 | return; |
71 | } | |
72 | } | |
73 | ||
12377024 CY |
74 | bio_for_each_segment_all(bvec, bio, i) { |
75 | struct page *page = bvec->bv_page; | |
f1e88660 | 76 | |
4e4cbee9 | 77 | if (!bio->bi_status) { |
237c0790 JK |
78 | if (!PageUptodate(page)) |
79 | SetPageUptodate(page); | |
f1e88660 JK |
80 | } else { |
81 | ClearPageUptodate(page); | |
82 | SetPageError(page); | |
83 | } | |
84 | unlock_page(page); | |
85 | } | |
f1e88660 JK |
86 | bio_put(bio); |
87 | } | |
88 | ||
4246a0b6 | 89 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 90 | { |
1b1f559f | 91 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
92 | struct bio_vec *bvec; |
93 | int i; | |
93dfe2ac | 94 | |
f568849e | 95 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac | 96 | struct page *page = bvec->bv_page; |
36951b38 | 97 | enum count_type type = WB_DATA_TYPE(page); |
93dfe2ac | 98 | |
0a595eba JK |
99 | if (IS_DUMMY_WRITTEN_PAGE(page)) { |
100 | set_page_private(page, (unsigned long)NULL); | |
101 | ClearPagePrivate(page); | |
102 | unlock_page(page); | |
103 | mempool_free(page, sbi->write_io_dummy); | |
104 | ||
4e4cbee9 | 105 | if (unlikely(bio->bi_status)) |
0a595eba JK |
106 | f2fs_stop_checkpoint(sbi, true); |
107 | continue; | |
108 | } | |
109 | ||
0b81d077 | 110 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 111 | |
4e4cbee9 | 112 | if (unlikely(bio->bi_status)) { |
5114a97a | 113 | mapping_set_error(page->mapping, -EIO); |
38f91ca8 | 114 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac | 115 | } |
36951b38 CY |
116 | dec_page_count(sbi, type); |
117 | clear_cold_data(page); | |
93dfe2ac | 118 | end_page_writeback(page); |
f568849e | 119 | } |
36951b38 | 120 | if (!get_pages(sbi, F2FS_WB_CP_DATA) && |
f5730184 | 121 | wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
122 | wake_up(&sbi->cp_wait); |
123 | ||
124 | bio_put(bio); | |
125 | } | |
126 | ||
3c62be17 JK |
127 | /* |
128 | * Return true, if pre_bio's bdev is same as its target device. | |
129 | */ | |
130 | struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, | |
131 | block_t blk_addr, struct bio *bio) | |
132 | { | |
133 | struct block_device *bdev = sbi->sb->s_bdev; | |
134 | int i; | |
135 | ||
136 | for (i = 0; i < sbi->s_ndevs; i++) { | |
137 | if (FDEV(i).start_blk <= blk_addr && | |
138 | FDEV(i).end_blk >= blk_addr) { | |
139 | blk_addr -= FDEV(i).start_blk; | |
140 | bdev = FDEV(i).bdev; | |
141 | break; | |
142 | } | |
143 | } | |
144 | if (bio) { | |
74d46992 | 145 | bio_set_dev(bio, bdev); |
3c62be17 JK |
146 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
147 | } | |
148 | return bdev; | |
149 | } | |
150 | ||
151 | int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) | |
152 | { | |
153 | int i; | |
154 | ||
155 | for (i = 0; i < sbi->s_ndevs; i++) | |
156 | if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) | |
157 | return i; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static bool __same_bdev(struct f2fs_sb_info *sbi, | |
162 | block_t blk_addr, struct bio *bio) | |
163 | { | |
74d46992 CH |
164 | struct block_device *b = f2fs_target_device(sbi, blk_addr, NULL); |
165 | return bio->bi_disk == b->bd_disk && bio->bi_partno == b->bd_partno; | |
3c62be17 JK |
166 | } |
167 | ||
940a6d34 GZ |
168 | /* |
169 | * Low-level block read/write IO operations. | |
170 | */ | |
171 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
172 | int npages, bool is_read) | |
173 | { | |
174 | struct bio *bio; | |
175 | ||
740432f8 | 176 | bio = f2fs_bio_alloc(npages); |
940a6d34 | 177 | |
3c62be17 | 178 | f2fs_target_device(sbi, blk_addr, bio); |
940a6d34 | 179 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 180 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
181 | |
182 | return bio; | |
183 | } | |
184 | ||
4fc29c1a LT |
185 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
186 | struct bio *bio, enum page_type type) | |
f5730184 | 187 | { |
4fc29c1a | 188 | if (!is_read_io(bio_op(bio))) { |
0a595eba JK |
189 | unsigned int start; |
190 | ||
0bfd7a09 | 191 | if (f2fs_sb_mounted_blkzoned(sbi->sb) && |
52763a4b | 192 | current->plug && (type == DATA || type == NODE)) |
19a5f5e2 | 193 | blk_finish_plug(current->plug); |
0a595eba JK |
194 | |
195 | if (type != DATA && type != NODE) | |
196 | goto submit_io; | |
197 | ||
198 | start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS; | |
199 | start %= F2FS_IO_SIZE(sbi); | |
200 | ||
201 | if (start == 0) | |
202 | goto submit_io; | |
203 | ||
204 | /* fill dummy pages */ | |
205 | for (; start < F2FS_IO_SIZE(sbi); start++) { | |
206 | struct page *page = | |
207 | mempool_alloc(sbi->write_io_dummy, | |
208 | GFP_NOIO | __GFP_ZERO | __GFP_NOFAIL); | |
209 | f2fs_bug_on(sbi, !page); | |
210 | ||
211 | SetPagePrivate(page); | |
212 | set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE); | |
213 | lock_page(page); | |
214 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) | |
215 | f2fs_bug_on(sbi, 1); | |
216 | } | |
217 | /* | |
218 | * In the NODE case, we lose next block address chain. So, we | |
219 | * need to do checkpoint in f2fs_sync_file. | |
220 | */ | |
221 | if (type == NODE) | |
222 | set_sbi_flag(sbi, SBI_NEED_CP); | |
19a5f5e2 | 223 | } |
0a595eba | 224 | submit_io: |
554b5125 JK |
225 | if (is_read_io(bio_op(bio))) |
226 | trace_f2fs_submit_read_bio(sbi->sb, type, bio); | |
227 | else | |
228 | trace_f2fs_submit_write_bio(sbi->sb, type, bio); | |
4e49ea4a | 229 | submit_bio(bio); |
f5730184 JK |
230 | } |
231 | ||
458e6197 | 232 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 233 | { |
458e6197 | 234 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
235 | |
236 | if (!io->bio) | |
237 | return; | |
238 | ||
554b5125 JK |
239 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
240 | ||
04d328de | 241 | if (is_read_io(fio->op)) |
554b5125 | 242 | trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio); |
6a8f8ca5 | 243 | else |
554b5125 | 244 | trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio); |
04d328de | 245 | |
4fc29c1a | 246 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
247 | io->bio = NULL; |
248 | } | |
249 | ||
942fd319 JK |
250 | static bool __has_merged_page(struct f2fs_bio_info *io, |
251 | struct inode *inode, nid_t ino, pgoff_t idx) | |
0fd785eb | 252 | { |
0fd785eb CY |
253 | struct bio_vec *bvec; |
254 | struct page *target; | |
255 | int i; | |
256 | ||
0c3a5797 | 257 | if (!io->bio) |
0fd785eb | 258 | return false; |
0c3a5797 | 259 | |
942fd319 | 260 | if (!inode && !ino) |
0c3a5797 | 261 | return true; |
0fd785eb CY |
262 | |
263 | bio_for_each_segment_all(bvec, io->bio, i) { | |
264 | ||
0b81d077 | 265 | if (bvec->bv_page->mapping) |
0fd785eb | 266 | target = bvec->bv_page; |
0b81d077 JK |
267 | else |
268 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 269 | |
942fd319 JK |
270 | if (idx != target->index) |
271 | continue; | |
272 | ||
0c3a5797 CY |
273 | if (inode && inode == target->mapping->host) |
274 | return true; | |
0c3a5797 | 275 | if (ino && ino == ino_of_node(target)) |
0fd785eb | 276 | return true; |
0fd785eb CY |
277 | } |
278 | ||
0fd785eb CY |
279 | return false; |
280 | } | |
281 | ||
0c3a5797 | 282 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
942fd319 | 283 | nid_t ino, pgoff_t idx, enum page_type type) |
0c3a5797 CY |
284 | { |
285 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
a912b54d JK |
286 | enum temp_type temp; |
287 | struct f2fs_bio_info *io; | |
288 | bool ret = false; | |
0c3a5797 | 289 | |
a912b54d JK |
290 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { |
291 | io = sbi->write_io[btype] + temp; | |
292 | ||
293 | down_read(&io->io_rwsem); | |
294 | ret = __has_merged_page(io, inode, ino, idx); | |
295 | up_read(&io->io_rwsem); | |
0c3a5797 | 296 | |
a912b54d JK |
297 | /* TODO: use HOT temp only for meta pages now. */ |
298 | if (ret || btype == META) | |
299 | break; | |
300 | } | |
0c3a5797 CY |
301 | return ret; |
302 | } | |
303 | ||
b9109b0e | 304 | static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi, |
a912b54d | 305 | enum page_type type, enum temp_type temp) |
93dfe2ac JK |
306 | { |
307 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
a912b54d | 308 | struct f2fs_bio_info *io = sbi->write_io[btype] + temp; |
93dfe2ac | 309 | |
df0f8dc0 | 310 | down_write(&io->io_rwsem); |
458e6197 JK |
311 | |
312 | /* change META to META_FLUSH in the checkpoint procedure */ | |
313 | if (type >= META_FLUSH) { | |
314 | io->fio.type = META_FLUSH; | |
04d328de | 315 | io->fio.op = REQ_OP_WRITE; |
3adc5fcb | 316 | io->fio.op_flags = REQ_META | REQ_PRIO | REQ_SYNC; |
70fd7614 | 317 | if (!test_opt(sbi, NOBARRIER)) |
7f54f51f | 318 | io->fio.op_flags |= REQ_PREFLUSH | REQ_FUA; |
458e6197 JK |
319 | } |
320 | __submit_merged_bio(io); | |
df0f8dc0 | 321 | up_write(&io->io_rwsem); |
93dfe2ac JK |
322 | } |
323 | ||
a912b54d JK |
324 | static void __submit_merged_write_cond(struct f2fs_sb_info *sbi, |
325 | struct inode *inode, nid_t ino, pgoff_t idx, | |
326 | enum page_type type, bool force) | |
0c3a5797 | 327 | { |
a912b54d JK |
328 | enum temp_type temp; |
329 | ||
330 | if (!force && !has_merged_page(sbi, inode, ino, idx, type)) | |
331 | return; | |
332 | ||
333 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { | |
334 | ||
335 | __f2fs_submit_merged_write(sbi, type, temp); | |
336 | ||
337 | /* TODO: use HOT temp only for meta pages now. */ | |
338 | if (type >= META) | |
339 | break; | |
340 | } | |
0c3a5797 CY |
341 | } |
342 | ||
b9109b0e | 343 | void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type) |
0c3a5797 | 344 | { |
a912b54d | 345 | __submit_merged_write_cond(sbi, NULL, 0, 0, type, true); |
0c3a5797 CY |
346 | } |
347 | ||
b9109b0e | 348 | void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi, |
942fd319 | 349 | struct inode *inode, nid_t ino, pgoff_t idx, |
b9109b0e | 350 | enum page_type type) |
0c3a5797 | 351 | { |
a912b54d | 352 | __submit_merged_write_cond(sbi, inode, ino, idx, type, false); |
0c3a5797 CY |
353 | } |
354 | ||
b9109b0e | 355 | void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi) |
406657dd | 356 | { |
b9109b0e JK |
357 | f2fs_submit_merged_write(sbi, DATA); |
358 | f2fs_submit_merged_write(sbi, NODE); | |
359 | f2fs_submit_merged_write(sbi, META); | |
406657dd CY |
360 | } |
361 | ||
93dfe2ac JK |
362 | /* |
363 | * Fill the locked page with data located in the block address. | |
771a9a71 | 364 | * A caller needs to unlock the page on failure. |
93dfe2ac | 365 | */ |
05ca3632 | 366 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 367 | { |
93dfe2ac | 368 | struct bio *bio; |
0b81d077 JK |
369 | struct page *page = fio->encrypted_page ? |
370 | fio->encrypted_page : fio->page; | |
93dfe2ac | 371 | |
2ace38e0 | 372 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 373 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
374 | |
375 | /* Allocate a new bio */ | |
04d328de | 376 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 377 | |
09cbfeaf | 378 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 379 | bio_put(bio); |
93dfe2ac JK |
380 | return -EFAULT; |
381 | } | |
04d328de | 382 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 383 | |
4fc29c1a | 384 | __submit_bio(fio->sbi, bio, fio->type); |
d1b3e72d JK |
385 | |
386 | if (!is_read_io(fio->op)) | |
387 | inc_page_count(fio->sbi, WB_DATA_TYPE(fio->page)); | |
93dfe2ac JK |
388 | return 0; |
389 | } | |
390 | ||
b9109b0e | 391 | int f2fs_submit_page_write(struct f2fs_io_info *fio) |
93dfe2ac | 392 | { |
05ca3632 | 393 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 394 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
a912b54d | 395 | struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp; |
4375a336 | 396 | struct page *bio_page; |
0a595eba | 397 | int err = 0; |
93dfe2ac | 398 | |
b9109b0e | 399 | f2fs_bug_on(sbi, is_read_io(fio->op)); |
93dfe2ac | 400 | |
fb830fc5 CY |
401 | down_write(&io->io_rwsem); |
402 | next: | |
403 | if (fio->in_list) { | |
404 | spin_lock(&io->io_lock); | |
405 | if (list_empty(&io->io_list)) { | |
406 | spin_unlock(&io->io_lock); | |
407 | goto out_fail; | |
408 | } | |
409 | fio = list_first_entry(&io->io_list, | |
410 | struct f2fs_io_info, list); | |
411 | list_del(&fio->list); | |
412 | spin_unlock(&io->io_lock); | |
413 | } | |
93dfe2ac | 414 | |
7a9d7548 CY |
415 | if (fio->old_blkaddr != NEW_ADDR) |
416 | verify_block_addr(sbi, fio->old_blkaddr); | |
417 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 418 | |
36951b38 CY |
419 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
420 | ||
d68f735b JK |
421 | /* set submitted = 1 as a return value */ |
422 | fio->submitted = 1; | |
423 | ||
b9109b0e | 424 | inc_page_count(sbi, WB_DATA_TYPE(bio_page)); |
93dfe2ac | 425 | |
7a9d7548 | 426 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
3c62be17 JK |
427 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) || |
428 | !__same_bdev(sbi, fio->new_blkaddr, io->bio))) | |
458e6197 | 429 | __submit_merged_bio(io); |
93dfe2ac JK |
430 | alloc_new: |
431 | if (io->bio == NULL) { | |
0a595eba JK |
432 | if ((fio->type == DATA || fio->type == NODE) && |
433 | fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) { | |
434 | err = -EAGAIN; | |
b9109b0e | 435 | dec_page_count(sbi, WB_DATA_TYPE(bio_page)); |
0a595eba JK |
436 | goto out_fail; |
437 | } | |
7a9d7548 | 438 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
b9109b0e | 439 | BIO_MAX_PAGES, false); |
458e6197 | 440 | io->fio = *fio; |
93dfe2ac JK |
441 | } |
442 | ||
a912b54d | 443 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) { |
458e6197 | 444 | __submit_merged_bio(io); |
93dfe2ac JK |
445 | goto alloc_new; |
446 | } | |
447 | ||
7a9d7548 | 448 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 449 | f2fs_trace_ios(fio, 0); |
fb830fc5 CY |
450 | |
451 | trace_f2fs_submit_page_write(fio->page, fio); | |
452 | ||
453 | if (fio->in_list) | |
454 | goto next; | |
0a595eba | 455 | out_fail: |
df0f8dc0 | 456 | up_write(&io->io_rwsem); |
0a595eba | 457 | return err; |
93dfe2ac JK |
458 | } |
459 | ||
46008c6d CY |
460 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
461 | { | |
462 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
463 | __le32 *addr_array; | |
464 | ||
465 | /* Get physical address of data block */ | |
466 | addr_array = blkaddr_in_node(rn); | |
467 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
468 | } | |
469 | ||
0a8165d7 | 470 | /* |
eb47b800 JK |
471 | * Lock ordering for the change of data block address: |
472 | * ->data_page | |
473 | * ->node_page | |
474 | * update block addresses in the node page | |
475 | */ | |
216a620a | 476 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 477 | { |
46008c6d CY |
478 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
479 | __set_data_blkaddr(dn); | |
480 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 481 | dn->node_changed = true; |
eb47b800 JK |
482 | } |
483 | ||
f28b3434 CY |
484 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
485 | { | |
486 | dn->data_blkaddr = blkaddr; | |
487 | set_data_blkaddr(dn); | |
488 | f2fs_update_extent_cache(dn); | |
489 | } | |
490 | ||
46008c6d CY |
491 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
492 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 493 | { |
4081363f | 494 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
0abd675e | 495 | int err; |
eb47b800 | 496 | |
46008c6d CY |
497 | if (!count) |
498 | return 0; | |
499 | ||
91942321 | 500 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 501 | return -EPERM; |
0abd675e CY |
502 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
503 | return err; | |
eb47b800 | 504 | |
46008c6d CY |
505 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
506 | dn->ofs_in_node, count); | |
507 | ||
508 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
509 | ||
510 | for (; count > 0; dn->ofs_in_node++) { | |
511 | block_t blkaddr = | |
512 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
513 | if (blkaddr == NULL_ADDR) { | |
514 | dn->data_blkaddr = NEW_ADDR; | |
515 | __set_data_blkaddr(dn); | |
516 | count--; | |
517 | } | |
518 | } | |
519 | ||
520 | if (set_page_dirty(dn->node_page)) | |
521 | dn->node_changed = true; | |
eb47b800 JK |
522 | return 0; |
523 | } | |
524 | ||
46008c6d CY |
525 | /* Should keep dn->ofs_in_node unchanged */ |
526 | int reserve_new_block(struct dnode_of_data *dn) | |
527 | { | |
528 | unsigned int ofs_in_node = dn->ofs_in_node; | |
529 | int ret; | |
530 | ||
531 | ret = reserve_new_blocks(dn, 1); | |
532 | dn->ofs_in_node = ofs_in_node; | |
533 | return ret; | |
534 | } | |
535 | ||
b600965c HL |
536 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
537 | { | |
538 | bool need_put = dn->inode_page ? false : true; | |
539 | int err; | |
540 | ||
541 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
542 | if (err) | |
543 | return err; | |
a8865372 | 544 | |
b600965c HL |
545 | if (dn->data_blkaddr == NULL_ADDR) |
546 | err = reserve_new_block(dn); | |
a8865372 | 547 | if (err || need_put) |
b600965c HL |
548 | f2fs_put_dnode(dn); |
549 | return err; | |
550 | } | |
551 | ||
759af1c9 | 552 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 553 | { |
e15882b6 | 554 | struct extent_info ei = {0,0,0}; |
759af1c9 | 555 | struct inode *inode = dn->inode; |
028a41e8 | 556 | |
759af1c9 FL |
557 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
558 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
559 | return 0; | |
429511cd | 560 | } |
028a41e8 | 561 | |
759af1c9 | 562 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
563 | } |
564 | ||
a56c7c6f | 565 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 566 | int op_flags, bool for_write) |
eb47b800 | 567 | { |
eb47b800 JK |
568 | struct address_space *mapping = inode->i_mapping; |
569 | struct dnode_of_data dn; | |
570 | struct page *page; | |
e15882b6 | 571 | struct extent_info ei = {0,0,0}; |
eb47b800 | 572 | int err; |
cf04e8eb | 573 | struct f2fs_io_info fio = { |
05ca3632 | 574 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 575 | .type = DATA, |
04d328de MC |
576 | .op = REQ_OP_READ, |
577 | .op_flags = op_flags, | |
4375a336 | 578 | .encrypted_page = NULL, |
cf04e8eb | 579 | }; |
eb47b800 | 580 | |
4375a336 JK |
581 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
582 | return read_mapping_page(mapping, index, NULL); | |
583 | ||
a56c7c6f | 584 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
585 | if (!page) |
586 | return ERR_PTR(-ENOMEM); | |
587 | ||
cb3bc9ee CY |
588 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
589 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
590 | goto got_it; | |
591 | } | |
592 | ||
eb47b800 | 593 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 594 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
595 | if (err) |
596 | goto put_err; | |
eb47b800 JK |
597 | f2fs_put_dnode(&dn); |
598 | ||
6bacf52f | 599 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
600 | err = -ENOENT; |
601 | goto put_err; | |
650495de | 602 | } |
cb3bc9ee | 603 | got_it: |
43f3eae1 JK |
604 | if (PageUptodate(page)) { |
605 | unlock_page(page); | |
eb47b800 | 606 | return page; |
43f3eae1 | 607 | } |
eb47b800 | 608 | |
d59ff4df JK |
609 | /* |
610 | * A new dentry page is allocated but not able to be written, since its | |
611 | * new inode page couldn't be allocated due to -ENOSPC. | |
612 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
613 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
614 | */ | |
615 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 616 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
617 | if (!PageUptodate(page)) |
618 | SetPageUptodate(page); | |
43f3eae1 | 619 | unlock_page(page); |
d59ff4df JK |
620 | return page; |
621 | } | |
eb47b800 | 622 | |
7a9d7548 | 623 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
624 | fio.page = page; |
625 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 626 | if (err) |
86531d6b | 627 | goto put_err; |
43f3eae1 | 628 | return page; |
86531d6b JK |
629 | |
630 | put_err: | |
631 | f2fs_put_page(page, 1); | |
632 | return ERR_PTR(err); | |
43f3eae1 JK |
633 | } |
634 | ||
635 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
636 | { | |
637 | struct address_space *mapping = inode->i_mapping; | |
638 | struct page *page; | |
639 | ||
640 | page = find_get_page(mapping, index); | |
641 | if (page && PageUptodate(page)) | |
642 | return page; | |
643 | f2fs_put_page(page, 0); | |
644 | ||
70fd7614 | 645 | page = get_read_data_page(inode, index, 0, false); |
43f3eae1 JK |
646 | if (IS_ERR(page)) |
647 | return page; | |
648 | ||
649 | if (PageUptodate(page)) | |
650 | return page; | |
651 | ||
652 | wait_on_page_locked(page); | |
653 | if (unlikely(!PageUptodate(page))) { | |
654 | f2fs_put_page(page, 0); | |
655 | return ERR_PTR(-EIO); | |
656 | } | |
657 | return page; | |
658 | } | |
659 | ||
660 | /* | |
661 | * If it tries to access a hole, return an error. | |
662 | * Because, the callers, functions in dir.c and GC, should be able to know | |
663 | * whether this page exists or not. | |
664 | */ | |
a56c7c6f JK |
665 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
666 | bool for_write) | |
43f3eae1 JK |
667 | { |
668 | struct address_space *mapping = inode->i_mapping; | |
669 | struct page *page; | |
670 | repeat: | |
70fd7614 | 671 | page = get_read_data_page(inode, index, 0, for_write); |
43f3eae1 JK |
672 | if (IS_ERR(page)) |
673 | return page; | |
393ff91f | 674 | |
43f3eae1 | 675 | /* wait for read completion */ |
393ff91f | 676 | lock_page(page); |
6bacf52f | 677 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
678 | f2fs_put_page(page, 1); |
679 | goto repeat; | |
eb47b800 | 680 | } |
1563ac75 CY |
681 | if (unlikely(!PageUptodate(page))) { |
682 | f2fs_put_page(page, 1); | |
683 | return ERR_PTR(-EIO); | |
684 | } | |
eb47b800 JK |
685 | return page; |
686 | } | |
687 | ||
0a8165d7 | 688 | /* |
eb47b800 JK |
689 | * Caller ensures that this data page is never allocated. |
690 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 691 | * |
4f4124d0 CY |
692 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
693 | * f2fs_unlock_op(). | |
470f00e9 CY |
694 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
695 | * ipage should be released by this function. | |
eb47b800 | 696 | */ |
64aa7ed9 | 697 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 698 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 699 | { |
eb47b800 JK |
700 | struct address_space *mapping = inode->i_mapping; |
701 | struct page *page; | |
702 | struct dnode_of_data dn; | |
703 | int err; | |
7612118a | 704 | |
a56c7c6f | 705 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
706 | if (!page) { |
707 | /* | |
708 | * before exiting, we should make sure ipage will be released | |
709 | * if any error occur. | |
710 | */ | |
711 | f2fs_put_page(ipage, 1); | |
01f28610 | 712 | return ERR_PTR(-ENOMEM); |
470f00e9 | 713 | } |
eb47b800 | 714 | |
a8865372 | 715 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 716 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
717 | if (err) { |
718 | f2fs_put_page(page, 1); | |
eb47b800 | 719 | return ERR_PTR(err); |
a8865372 | 720 | } |
01f28610 JK |
721 | if (!ipage) |
722 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
723 | |
724 | if (PageUptodate(page)) | |
01f28610 | 725 | goto got_it; |
eb47b800 JK |
726 | |
727 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 728 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
729 | if (!PageUptodate(page)) |
730 | SetPageUptodate(page); | |
eb47b800 | 731 | } else { |
4375a336 | 732 | f2fs_put_page(page, 1); |
a8865372 | 733 | |
7612118a JK |
734 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
735 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
736 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 737 | if (IS_ERR(page)) |
7612118a | 738 | return page; |
eb47b800 | 739 | } |
01f28610 | 740 | got_it: |
9edcdabf | 741 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 742 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 743 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
744 | return page; |
745 | } | |
746 | ||
bfad7c2d JK |
747 | static int __allocate_data_block(struct dnode_of_data *dn) |
748 | { | |
4081363f | 749 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 750 | struct f2fs_summary sum; |
bfad7c2d | 751 | struct node_info ni; |
976e4c50 | 752 | pgoff_t fofs; |
46008c6d | 753 | blkcnt_t count = 1; |
0abd675e | 754 | int err; |
bfad7c2d | 755 | |
91942321 | 756 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 757 | return -EPERM; |
df6136ef CY |
758 | |
759 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
760 | if (dn->data_blkaddr == NEW_ADDR) | |
761 | goto alloc; | |
762 | ||
0abd675e CY |
763 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
764 | return err; | |
bfad7c2d | 765 | |
df6136ef | 766 | alloc: |
bfad7c2d JK |
767 | get_node_info(sbi, dn->nid, &ni); |
768 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
769 | ||
df6136ef | 770 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
fb830fc5 | 771 | &sum, CURSEG_WARM_DATA, NULL, false); |
216a620a | 772 | set_data_blkaddr(dn); |
bfad7c2d | 773 | |
976e4c50 | 774 | /* update i_size */ |
81ca7350 | 775 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 776 | dn->ofs_in_node; |
09cbfeaf | 777 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 778 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 779 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
780 | return 0; |
781 | } | |
782 | ||
c040ff9d JK |
783 | static inline bool __force_buffered_io(struct inode *inode, int rw) |
784 | { | |
785 | return ((f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) || | |
786 | (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS)) || | |
787 | F2FS_I_SB(inode)->s_ndevs); | |
788 | } | |
789 | ||
a7de6086 | 790 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 791 | { |
b439b103 | 792 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 793 | struct f2fs_map_blocks map; |
a7de6086 | 794 | int err = 0; |
59b802e5 | 795 | |
dc91de78 JK |
796 | if (is_inode_flag_set(inode, FI_NO_PREALLOC)) |
797 | return 0; | |
798 | ||
0080c507 | 799 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
800 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
801 | if (map.m_len > map.m_lblk) | |
802 | map.m_len -= map.m_lblk; | |
803 | else | |
804 | map.m_len = 0; | |
805 | ||
da85985c | 806 | map.m_next_pgofs = NULL; |
2a340760 | 807 | |
24b84912 | 808 | if (iocb->ki_flags & IOCB_DIRECT) { |
a7de6086 JK |
809 | err = f2fs_convert_inline_inode(inode); |
810 | if (err) | |
811 | return err; | |
c040ff9d JK |
812 | return f2fs_map_blocks(inode, &map, 1, |
813 | __force_buffered_io(inode, WRITE) ? | |
814 | F2FS_GET_BLOCK_PRE_AIO : | |
815 | F2FS_GET_BLOCK_PRE_DIO); | |
24b84912 JK |
816 | } |
817 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
a7de6086 JK |
818 | err = f2fs_convert_inline_inode(inode); |
819 | if (err) | |
820 | return err; | |
b439b103 | 821 | } |
24b84912 JK |
822 | if (!f2fs_has_inline_data(inode)) |
823 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
a7de6086 | 824 | return err; |
59b802e5 JK |
825 | } |
826 | ||
59c9081b YH |
827 | static inline void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock) |
828 | { | |
829 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { | |
830 | if (lock) | |
831 | down_read(&sbi->node_change); | |
832 | else | |
833 | up_read(&sbi->node_change); | |
834 | } else { | |
835 | if (lock) | |
836 | f2fs_lock_op(sbi); | |
837 | else | |
838 | f2fs_unlock_op(sbi); | |
839 | } | |
840 | } | |
841 | ||
0a8165d7 | 842 | /* |
003a3e1d JK |
843 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
844 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
845 | * If original data blocks are allocated, then give them to blockdev. |
846 | * Otherwise, | |
847 | * a. preallocate requested block addresses | |
848 | * b. do not use extent cache for better performance | |
849 | * c. give the block addresses to blockdev | |
eb47b800 | 850 | */ |
d323d005 | 851 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 852 | int create, int flag) |
eb47b800 | 853 | { |
003a3e1d | 854 | unsigned int maxblocks = map->m_len; |
eb47b800 | 855 | struct dnode_of_data dn; |
f9811703 | 856 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 857 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 858 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 859 | int err = 0, ofs = 1; |
46008c6d CY |
860 | unsigned int ofs_in_node, last_ofs_in_node; |
861 | blkcnt_t prealloc; | |
e15882b6 | 862 | struct extent_info ei = {0,0,0}; |
7df3a431 | 863 | block_t blkaddr; |
eb47b800 | 864 | |
dfd02e4d CY |
865 | if (!maxblocks) |
866 | return 0; | |
867 | ||
003a3e1d JK |
868 | map->m_len = 0; |
869 | map->m_flags = 0; | |
870 | ||
871 | /* it only supports block size == page size */ | |
872 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 873 | end = pgofs + maxblocks; |
eb47b800 | 874 | |
24b84912 | 875 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
876 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
877 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
878 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 879 | goto out; |
a2e7d1bf | 880 | } |
bfad7c2d | 881 | |
4fe71e88 | 882 | next_dnode: |
59b802e5 | 883 | if (create) |
59c9081b | 884 | __do_map_lock(sbi, flag, true); |
eb47b800 JK |
885 | |
886 | /* When reading holes, we need its node page */ | |
887 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 888 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 889 | if (err) { |
43473f96 CY |
890 | if (flag == F2FS_GET_BLOCK_BMAP) |
891 | map->m_pblk = 0; | |
da85985c | 892 | if (err == -ENOENT) { |
bfad7c2d | 893 | err = 0; |
da85985c CY |
894 | if (map->m_next_pgofs) |
895 | *map->m_next_pgofs = | |
896 | get_next_page_offset(&dn, pgofs); | |
897 | } | |
bfad7c2d | 898 | goto unlock_out; |
848753aa | 899 | } |
973163fc | 900 | |
46008c6d | 901 | prealloc = 0; |
230436b3 | 902 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 903 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
904 | |
905 | next_block: | |
906 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
907 | ||
908 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 909 | if (create) { |
f9811703 CY |
910 | if (unlikely(f2fs_cp_error(sbi))) { |
911 | err = -EIO; | |
4fe71e88 | 912 | goto sync_out; |
f9811703 | 913 | } |
24b84912 | 914 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
915 | if (blkaddr == NULL_ADDR) { |
916 | prealloc++; | |
917 | last_ofs_in_node = dn.ofs_in_node; | |
918 | } | |
24b84912 JK |
919 | } else { |
920 | err = __allocate_data_block(&dn); | |
6f2d8ed6 | 921 | if (!err) |
91942321 | 922 | set_inode_flag(inode, FI_APPEND_WRITE); |
24b84912 | 923 | } |
973163fc | 924 | if (err) |
4fe71e88 | 925 | goto sync_out; |
3f2be043 | 926 | map->m_flags |= F2FS_MAP_NEW; |
4fe71e88 | 927 | blkaddr = dn.data_blkaddr; |
973163fc | 928 | } else { |
43473f96 CY |
929 | if (flag == F2FS_GET_BLOCK_BMAP) { |
930 | map->m_pblk = 0; | |
931 | goto sync_out; | |
932 | } | |
da85985c CY |
933 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
934 | blkaddr == NULL_ADDR) { | |
935 | if (map->m_next_pgofs) | |
936 | *map->m_next_pgofs = pgofs + 1; | |
937 | } | |
973163fc | 938 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 939 | blkaddr != NEW_ADDR) |
4fe71e88 | 940 | goto sync_out; |
e2b4e2bc | 941 | } |
e2b4e2bc | 942 | } |
eb47b800 | 943 | |
46008c6d CY |
944 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
945 | goto skip; | |
946 | ||
4fe71e88 CY |
947 | if (map->m_len == 0) { |
948 | /* preallocated unwritten block should be mapped for fiemap. */ | |
949 | if (blkaddr == NEW_ADDR) | |
950 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
951 | map->m_flags |= F2FS_MAP_MAPPED; | |
952 | ||
953 | map->m_pblk = blkaddr; | |
954 | map->m_len = 1; | |
955 | } else if ((map->m_pblk != NEW_ADDR && | |
956 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 957 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 958 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
959 | ofs++; |
960 | map->m_len++; | |
961 | } else { | |
962 | goto sync_out; | |
963 | } | |
bfad7c2d | 964 | |
46008c6d | 965 | skip: |
bfad7c2d JK |
966 | dn.ofs_in_node++; |
967 | pgofs++; | |
968 | ||
46008c6d CY |
969 | /* preallocate blocks in batch for one dnode page */ |
970 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
971 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 972 | |
46008c6d CY |
973 | dn.ofs_in_node = ofs_in_node; |
974 | err = reserve_new_blocks(&dn, prealloc); | |
975 | if (err) | |
976 | goto sync_out; | |
bfad7c2d | 977 | |
46008c6d CY |
978 | map->m_len += dn.ofs_in_node - ofs_in_node; |
979 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
980 | err = -ENOSPC; | |
981 | goto sync_out; | |
3104af35 | 982 | } |
46008c6d CY |
983 | dn.ofs_in_node = end_offset; |
984 | } | |
985 | ||
986 | if (pgofs >= end) | |
987 | goto sync_out; | |
988 | else if (dn.ofs_in_node < end_offset) | |
989 | goto next_block; | |
990 | ||
46008c6d CY |
991 | f2fs_put_dnode(&dn); |
992 | ||
993 | if (create) { | |
59c9081b | 994 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 995 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 996 | } |
46008c6d | 997 | goto next_dnode; |
7df3a431 | 998 | |
bfad7c2d | 999 | sync_out: |
eb47b800 | 1000 | f2fs_put_dnode(&dn); |
bfad7c2d | 1001 | unlock_out: |
2a340760 | 1002 | if (create) { |
59c9081b | 1003 | __do_map_lock(sbi, flag, false); |
6f2d8ed6 | 1004 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 1005 | } |
bfad7c2d | 1006 | out: |
003a3e1d | 1007 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 1008 | return err; |
eb47b800 JK |
1009 | } |
1010 | ||
003a3e1d | 1011 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
1012 | struct buffer_head *bh, int create, int flag, |
1013 | pgoff_t *next_pgofs) | |
003a3e1d JK |
1014 | { |
1015 | struct f2fs_map_blocks map; | |
a7de6086 | 1016 | int err; |
003a3e1d JK |
1017 | |
1018 | map.m_lblk = iblock; | |
1019 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 1020 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 1021 | |
a7de6086 JK |
1022 | err = f2fs_map_blocks(inode, &map, create, flag); |
1023 | if (!err) { | |
003a3e1d JK |
1024 | map_bh(bh, inode->i_sb, map.m_pblk); |
1025 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
b86e3307 | 1026 | bh->b_size = (u64)map.m_len << inode->i_blkbits; |
003a3e1d | 1027 | } |
a7de6086 | 1028 | return err; |
003a3e1d JK |
1029 | } |
1030 | ||
ccfb3000 | 1031 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
1032 | struct buffer_head *bh_result, int create, int flag, |
1033 | pgoff_t *next_pgofs) | |
e2b4e2bc | 1034 | { |
da85985c CY |
1035 | return __get_data_block(inode, iblock, bh_result, create, |
1036 | flag, next_pgofs); | |
e2b4e2bc CY |
1037 | } |
1038 | ||
1039 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
1040 | struct buffer_head *bh_result, int create) |
1041 | { | |
e2b4e2bc | 1042 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 1043 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
1044 | } |
1045 | ||
e2b4e2bc | 1046 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
1047 | struct buffer_head *bh_result, int create) |
1048 | { | |
179448bf | 1049 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 1050 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
1051 | return -EFBIG; |
1052 | ||
e2b4e2bc | 1053 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 1054 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
1055 | } |
1056 | ||
7f63eb77 JK |
1057 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
1058 | { | |
1059 | return (offset >> inode->i_blkbits); | |
1060 | } | |
1061 | ||
1062 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
1063 | { | |
1064 | return (blk << inode->i_blkbits); | |
1065 | } | |
1066 | ||
9ab70134 JK |
1067 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1068 | u64 start, u64 len) | |
1069 | { | |
7f63eb77 JK |
1070 | struct buffer_head map_bh; |
1071 | sector_t start_blk, last_blk; | |
da85985c | 1072 | pgoff_t next_pgofs; |
7f63eb77 JK |
1073 | u64 logical = 0, phys = 0, size = 0; |
1074 | u32 flags = 0; | |
7f63eb77 JK |
1075 | int ret = 0; |
1076 | ||
1077 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1078 | if (ret) | |
1079 | return ret; | |
1080 | ||
67f8cf3c JK |
1081 | if (f2fs_has_inline_data(inode)) { |
1082 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
1083 | if (ret != -EAGAIN) | |
1084 | return ret; | |
1085 | } | |
1086 | ||
5955102c | 1087 | inode_lock(inode); |
de1475cc | 1088 | |
7f63eb77 JK |
1089 | if (logical_to_blk(inode, len) == 0) |
1090 | len = blk_to_logical(inode, 1); | |
1091 | ||
1092 | start_blk = logical_to_blk(inode, start); | |
1093 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 1094 | |
7f63eb77 JK |
1095 | next: |
1096 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
1097 | map_bh.b_size = len; | |
1098 | ||
e2b4e2bc | 1099 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 1100 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
1101 | if (ret) |
1102 | goto out; | |
1103 | ||
1104 | /* HOLE */ | |
1105 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 1106 | start_blk = next_pgofs; |
58736fa6 CY |
1107 | |
1108 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
1109 | F2FS_I_SB(inode)->max_file_blocks)) | |
9a950d52 | 1110 | goto prep_next; |
58736fa6 | 1111 | |
9a950d52 FL |
1112 | flags |= FIEMAP_EXTENT_LAST; |
1113 | } | |
7f63eb77 | 1114 | |
da5af127 CY |
1115 | if (size) { |
1116 | if (f2fs_encrypted_inode(inode)) | |
1117 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
1118 | ||
9a950d52 FL |
1119 | ret = fiemap_fill_next_extent(fieinfo, logical, |
1120 | phys, size, flags); | |
da5af127 | 1121 | } |
7f63eb77 | 1122 | |
9a950d52 FL |
1123 | if (start_blk > last_blk || ret) |
1124 | goto out; | |
7f63eb77 | 1125 | |
9a950d52 FL |
1126 | logical = blk_to_logical(inode, start_blk); |
1127 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
1128 | size = map_bh.b_size; | |
1129 | flags = 0; | |
1130 | if (buffer_unwritten(&map_bh)) | |
1131 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 1132 | |
9a950d52 | 1133 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 1134 | |
9a950d52 | 1135 | prep_next: |
7f63eb77 JK |
1136 | cond_resched(); |
1137 | if (fatal_signal_pending(current)) | |
1138 | ret = -EINTR; | |
1139 | else | |
1140 | goto next; | |
1141 | out: | |
1142 | if (ret == 1) | |
1143 | ret = 0; | |
1144 | ||
5955102c | 1145 | inode_unlock(inode); |
7f63eb77 | 1146 | return ret; |
9ab70134 JK |
1147 | } |
1148 | ||
6a7a3aed WY |
1149 | static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
1150 | unsigned nr_pages) | |
78682f79 CY |
1151 | { |
1152 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1153 | struct fscrypt_ctx *ctx = NULL; | |
78682f79 CY |
1154 | struct bio *bio; |
1155 | ||
1156 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1157 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
1158 | if (IS_ERR(ctx)) | |
1159 | return ERR_CAST(ctx); | |
1160 | ||
1161 | /* wait the page to be moved by cleaning */ | |
1162 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
1163 | } | |
1164 | ||
1165 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
1166 | if (!bio) { | |
1167 | if (ctx) | |
1168 | fscrypt_release_ctx(ctx); | |
1169 | return ERR_PTR(-ENOMEM); | |
1170 | } | |
3c62be17 | 1171 | f2fs_target_device(sbi, blkaddr, bio); |
78682f79 CY |
1172 | bio->bi_end_io = f2fs_read_end_io; |
1173 | bio->bi_private = ctx; | |
1174 | ||
1175 | return bio; | |
1176 | } | |
1177 | ||
f1e88660 JK |
1178 | /* |
1179 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1180 | * Major change was from block_size == page_size in f2fs by default. | |
1181 | */ | |
1182 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1183 | struct list_head *pages, struct page *page, | |
1184 | unsigned nr_pages) | |
1185 | { | |
1186 | struct bio *bio = NULL; | |
1187 | unsigned page_idx; | |
1188 | sector_t last_block_in_bio = 0; | |
1189 | struct inode *inode = mapping->host; | |
1190 | const unsigned blkbits = inode->i_blkbits; | |
1191 | const unsigned blocksize = 1 << blkbits; | |
1192 | sector_t block_in_file; | |
1193 | sector_t last_block; | |
1194 | sector_t last_block_in_file; | |
1195 | sector_t block_nr; | |
f1e88660 JK |
1196 | struct f2fs_map_blocks map; |
1197 | ||
1198 | map.m_pblk = 0; | |
1199 | map.m_lblk = 0; | |
1200 | map.m_len = 0; | |
1201 | map.m_flags = 0; | |
da85985c | 1202 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1203 | |
1204 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1205 | ||
f1e88660 | 1206 | if (pages) { |
939afa94 | 1207 | page = list_last_entry(pages, struct page, lru); |
a83d50bc KM |
1208 | |
1209 | prefetchw(&page->flags); | |
f1e88660 JK |
1210 | list_del(&page->lru); |
1211 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1212 | page->index, |
1213 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1214 | goto next_page; |
1215 | } | |
1216 | ||
1217 | block_in_file = (sector_t)page->index; | |
1218 | last_block = block_in_file + nr_pages; | |
1219 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1220 | blkbits; | |
1221 | if (last_block > last_block_in_file) | |
1222 | last_block = last_block_in_file; | |
1223 | ||
1224 | /* | |
1225 | * Map blocks using the previous result first. | |
1226 | */ | |
1227 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1228 | block_in_file > map.m_lblk && | |
1229 | block_in_file < (map.m_lblk + map.m_len)) | |
1230 | goto got_it; | |
1231 | ||
1232 | /* | |
1233 | * Then do more f2fs_map_blocks() calls until we are | |
1234 | * done with this page. | |
1235 | */ | |
1236 | map.m_flags = 0; | |
1237 | ||
1238 | if (block_in_file < last_block) { | |
1239 | map.m_lblk = block_in_file; | |
1240 | map.m_len = last_block - block_in_file; | |
1241 | ||
46c9e141 | 1242 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1243 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1244 | goto set_error_page; |
1245 | } | |
1246 | got_it: | |
1247 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1248 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1249 | SetPageMappedToDisk(page); | |
1250 | ||
1251 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1252 | SetPageUptodate(page); | |
1253 | goto confused; | |
1254 | } | |
1255 | } else { | |
09cbfeaf | 1256 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
1257 | if (!PageUptodate(page)) |
1258 | SetPageUptodate(page); | |
f1e88660 JK |
1259 | unlock_page(page); |
1260 | goto next_page; | |
1261 | } | |
1262 | ||
1263 | /* | |
1264 | * This page will go to BIO. Do we need to send this | |
1265 | * BIO off first? | |
1266 | */ | |
3c62be17 JK |
1267 | if (bio && (last_block_in_bio != block_nr - 1 || |
1268 | !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) { | |
f1e88660 | 1269 | submit_and_realloc: |
4fc29c1a | 1270 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1271 | bio = NULL; |
1272 | } | |
1273 | if (bio == NULL) { | |
78682f79 | 1274 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1d353eb7 JK |
1275 | if (IS_ERR(bio)) { |
1276 | bio = NULL; | |
f1e88660 | 1277 | goto set_error_page; |
4375a336 | 1278 | } |
04d328de | 1279 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1280 | } |
1281 | ||
1282 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1283 | goto submit_and_realloc; | |
1284 | ||
1285 | last_block_in_bio = block_nr; | |
1286 | goto next_page; | |
1287 | set_error_page: | |
1288 | SetPageError(page); | |
09cbfeaf | 1289 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1290 | unlock_page(page); |
1291 | goto next_page; | |
1292 | confused: | |
1293 | if (bio) { | |
4fc29c1a | 1294 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1295 | bio = NULL; |
1296 | } | |
1297 | unlock_page(page); | |
1298 | next_page: | |
1299 | if (pages) | |
09cbfeaf | 1300 | put_page(page); |
f1e88660 JK |
1301 | } |
1302 | BUG_ON(pages && !list_empty(pages)); | |
1303 | if (bio) | |
4fc29c1a | 1304 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1305 | return 0; |
1306 | } | |
1307 | ||
eb47b800 JK |
1308 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1309 | { | |
9ffe0fb5 | 1310 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1311 | int ret = -EAGAIN; |
9ffe0fb5 | 1312 | |
c20e89cd CY |
1313 | trace_f2fs_readpage(page, DATA); |
1314 | ||
e1c42045 | 1315 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1316 | if (f2fs_has_inline_data(inode)) |
1317 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1318 | if (ret == -EAGAIN) |
f1e88660 | 1319 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1320 | return ret; |
eb47b800 JK |
1321 | } |
1322 | ||
1323 | static int f2fs_read_data_pages(struct file *file, | |
1324 | struct address_space *mapping, | |
1325 | struct list_head *pages, unsigned nr_pages) | |
1326 | { | |
9ffe0fb5 | 1327 | struct inode *inode = file->f_mapping->host; |
939afa94 | 1328 | struct page *page = list_last_entry(pages, struct page, lru); |
b8c29400 CY |
1329 | |
1330 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1331 | |
1332 | /* If the file has inline data, skip readpages */ | |
1333 | if (f2fs_has_inline_data(inode)) | |
1334 | return 0; | |
1335 | ||
f1e88660 | 1336 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1337 | } |
1338 | ||
7eab0c0d HP |
1339 | static int encrypt_one_page(struct f2fs_io_info *fio) |
1340 | { | |
1341 | struct inode *inode = fio->page->mapping->host; | |
1342 | gfp_t gfp_flags = GFP_NOFS; | |
1343 | ||
1344 | if (!f2fs_encrypted_inode(inode) || !S_ISREG(inode->i_mode)) | |
1345 | return 0; | |
1346 | ||
1347 | /* wait for GCed encrypted page writeback */ | |
1348 | f2fs_wait_on_encrypted_page_writeback(fio->sbi, fio->old_blkaddr); | |
1349 | ||
1350 | retry_encrypt: | |
1351 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1352 | PAGE_SIZE, 0, fio->page->index, gfp_flags); | |
1353 | if (!IS_ERR(fio->encrypted_page)) | |
1354 | return 0; | |
1355 | ||
1356 | /* flush pending IOs and wait for a while in the ENOMEM case */ | |
1357 | if (PTR_ERR(fio->encrypted_page) == -ENOMEM) { | |
b9109b0e | 1358 | f2fs_flush_merged_writes(fio->sbi); |
7eab0c0d HP |
1359 | congestion_wait(BLK_RW_ASYNC, HZ/50); |
1360 | gfp_flags |= __GFP_NOFAIL; | |
1361 | goto retry_encrypt; | |
1362 | } | |
1363 | return PTR_ERR(fio->encrypted_page); | |
1364 | } | |
1365 | ||
1366 | static inline bool need_inplace_update(struct f2fs_io_info *fio) | |
1367 | { | |
1368 | struct inode *inode = fio->page->mapping->host; | |
1369 | ||
7eab0c0d HP |
1370 | if (S_ISDIR(inode->i_mode) || f2fs_is_atomic_file(inode)) |
1371 | return false; | |
1372 | if (is_cold_data(fio->page)) | |
1373 | return false; | |
1374 | if (IS_ATOMIC_WRITTEN_PAGE(fio->page)) | |
1375 | return false; | |
1376 | ||
1377 | return need_inplace_update_policy(inode, fio); | |
1378 | } | |
1379 | ||
a817737e JK |
1380 | static inline bool valid_ipu_blkaddr(struct f2fs_io_info *fio) |
1381 | { | |
1382 | if (fio->old_blkaddr == NEW_ADDR) | |
1383 | return false; | |
1384 | if (fio->old_blkaddr == NULL_ADDR) | |
1385 | return false; | |
1386 | return true; | |
1387 | } | |
1388 | ||
05ca3632 | 1389 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1390 | { |
05ca3632 | 1391 | struct page *page = fio->page; |
eb47b800 | 1392 | struct inode *inode = page->mapping->host; |
eb47b800 | 1393 | struct dnode_of_data dn; |
e959c8f5 HP |
1394 | struct extent_info ei = {0,0,0}; |
1395 | bool ipu_force = false; | |
eb47b800 JK |
1396 | int err = 0; |
1397 | ||
1398 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
e959c8f5 HP |
1399 | if (need_inplace_update(fio) && |
1400 | f2fs_lookup_extent_cache(inode, page->index, &ei)) { | |
1401 | fio->old_blkaddr = ei.blk + page->index - ei.fofs; | |
a817737e JK |
1402 | |
1403 | if (valid_ipu_blkaddr(fio)) { | |
e959c8f5 | 1404 | ipu_force = true; |
cc15620b | 1405 | fio->need_lock = LOCK_DONE; |
e959c8f5 HP |
1406 | goto got_it; |
1407 | } | |
1408 | } | |
279d6df2 | 1409 | |
d29460e5 JK |
1410 | /* Deadlock due to between page->lock and f2fs_lock_op */ |
1411 | if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi)) | |
1412 | return -EAGAIN; | |
279d6df2 | 1413 | |
266e97a8 | 1414 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 | 1415 | if (err) |
279d6df2 | 1416 | goto out; |
eb47b800 | 1417 | |
28bc106b | 1418 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1419 | |
1420 | /* This page is already truncated */ | |
7a9d7548 | 1421 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1422 | ClearPageUptodate(page); |
eb47b800 | 1423 | goto out_writepage; |
2bca1e23 | 1424 | } |
e959c8f5 | 1425 | got_it: |
eb47b800 JK |
1426 | /* |
1427 | * If current allocation needs SSR, | |
1428 | * it had better in-place writes for updated data. | |
1429 | */ | |
a817737e | 1430 | if (ipu_force || (valid_ipu_blkaddr(fio) && need_inplace_update(fio))) { |
cc15620b JK |
1431 | err = encrypt_one_page(fio); |
1432 | if (err) | |
1433 | goto out_writepage; | |
1434 | ||
1435 | set_page_writeback(page); | |
279d6df2 | 1436 | f2fs_put_dnode(&dn); |
cc15620b | 1437 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 1438 | f2fs_unlock_op(fio->sbi); |
d1b3e72d | 1439 | err = rewrite_data_page(fio); |
7eab0c0d | 1440 | trace_f2fs_do_write_data_page(fio->page, IPU); |
91942321 | 1441 | set_inode_flag(inode, FI_UPDATE_WRITE); |
279d6df2 | 1442 | return err; |
eb47b800 | 1443 | } |
279d6df2 | 1444 | |
cc15620b JK |
1445 | if (fio->need_lock == LOCK_RETRY) { |
1446 | if (!f2fs_trylock_op(fio->sbi)) { | |
1447 | err = -EAGAIN; | |
1448 | goto out_writepage; | |
1449 | } | |
1450 | fio->need_lock = LOCK_REQ; | |
1451 | } | |
1452 | ||
1453 | err = encrypt_one_page(fio); | |
1454 | if (err) | |
1455 | goto out_writepage; | |
1456 | ||
1457 | set_page_writeback(page); | |
1458 | ||
279d6df2 HP |
1459 | /* LFS mode write path */ |
1460 | write_data_page(&dn, fio); | |
1461 | trace_f2fs_do_write_data_page(page, OPU); | |
1462 | set_inode_flag(inode, FI_APPEND_WRITE); | |
1463 | if (page->index == 0) | |
1464 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1465 | out_writepage: |
1466 | f2fs_put_dnode(&dn); | |
279d6df2 | 1467 | out: |
cc15620b | 1468 | if (fio->need_lock == LOCK_REQ) |
279d6df2 | 1469 | f2fs_unlock_op(fio->sbi); |
eb47b800 JK |
1470 | return err; |
1471 | } | |
1472 | ||
d68f735b JK |
1473 | static int __write_data_page(struct page *page, bool *submitted, |
1474 | struct writeback_control *wbc) | |
eb47b800 JK |
1475 | { |
1476 | struct inode *inode = page->mapping->host; | |
4081363f | 1477 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1478 | loff_t i_size = i_size_read(inode); |
1479 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1480 | >> PAGE_SHIFT; |
26de9b11 | 1481 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1482 | unsigned offset = 0; |
39936837 | 1483 | bool need_balance_fs = false; |
eb47b800 | 1484 | int err = 0; |
458e6197 | 1485 | struct f2fs_io_info fio = { |
05ca3632 | 1486 | .sbi = sbi, |
458e6197 | 1487 | .type = DATA, |
04d328de | 1488 | .op = REQ_OP_WRITE, |
7637241e | 1489 | .op_flags = wbc_to_write_flags(wbc), |
e959c8f5 | 1490 | .old_blkaddr = NULL_ADDR, |
05ca3632 | 1491 | .page = page, |
4375a336 | 1492 | .encrypted_page = NULL, |
d68f735b | 1493 | .submitted = false, |
cc15620b | 1494 | .need_lock = LOCK_RETRY, |
458e6197 | 1495 | }; |
eb47b800 | 1496 | |
ecda0de3 CY |
1497 | trace_f2fs_writepage(page, DATA); |
1498 | ||
0771fcc7 CY |
1499 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
1500 | goto redirty_out; | |
1501 | ||
eb47b800 | 1502 | if (page->index < end_index) |
39936837 | 1503 | goto write; |
eb47b800 JK |
1504 | |
1505 | /* | |
1506 | * If the offset is out-of-range of file size, | |
1507 | * this page does not have to be written to disk. | |
1508 | */ | |
09cbfeaf | 1509 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1510 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1511 | goto out; |
eb47b800 | 1512 | |
09cbfeaf | 1513 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1514 | write: |
1e84371f JK |
1515 | if (f2fs_is_drop_cache(inode)) |
1516 | goto out; | |
e6e5f561 JK |
1517 | /* we should not write 0'th page having journal header */ |
1518 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1519 | (!wbc->for_reclaim && | |
1520 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1521 | goto redirty_out; |
eb47b800 | 1522 | |
cf779cab JK |
1523 | /* we should bypass data pages to proceed the kworkder jobs */ |
1524 | if (unlikely(f2fs_cp_error(sbi))) { | |
7f319975 | 1525 | mapping_set_error(page->mapping, -EIO); |
a7ffdbe2 | 1526 | goto out; |
cf779cab JK |
1527 | } |
1528 | ||
39936837 | 1529 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1530 | if (S_ISDIR(inode->i_mode)) { |
cc15620b | 1531 | fio.need_lock = LOCK_DONE; |
05ca3632 | 1532 | err = do_write_data_page(&fio); |
8618b881 JK |
1533 | goto done; |
1534 | } | |
9ffe0fb5 | 1535 | |
8618b881 | 1536 | if (!wbc->for_reclaim) |
39936837 | 1537 | need_balance_fs = true; |
7f3037a5 | 1538 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1539 | goto redirty_out; |
ef095d19 JK |
1540 | else |
1541 | set_inode_flag(inode, FI_HOT_DATA); | |
eb47b800 | 1542 | |
b3d208f9 | 1543 | err = -EAGAIN; |
dd7b2333 | 1544 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 | 1545 | err = f2fs_write_inline_data(inode, page); |
dd7b2333 YH |
1546 | if (!err) |
1547 | goto out; | |
1548 | } | |
279d6df2 | 1549 | |
cc15620b | 1550 | if (err == -EAGAIN) { |
05ca3632 | 1551 | err = do_write_data_page(&fio); |
cc15620b JK |
1552 | if (err == -EAGAIN) { |
1553 | fio.need_lock = LOCK_REQ; | |
1554 | err = do_write_data_page(&fio); | |
1555 | } | |
1556 | } | |
26de9b11 JK |
1557 | if (F2FS_I(inode)->last_disk_size < psize) |
1558 | F2FS_I(inode)->last_disk_size = psize; | |
279d6df2 | 1559 | |
8618b881 JK |
1560 | done: |
1561 | if (err && err != -ENOENT) | |
1562 | goto redirty_out; | |
eb47b800 | 1563 | |
39936837 | 1564 | out: |
a7ffdbe2 | 1565 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1566 | if (err) |
1567 | ClearPageUptodate(page); | |
0c3a5797 CY |
1568 | |
1569 | if (wbc->for_reclaim) { | |
b9109b0e | 1570 | f2fs_submit_merged_write_cond(sbi, inode, 0, page->index, DATA); |
ef095d19 | 1571 | clear_inode_flag(inode, FI_HOT_DATA); |
0c3a5797 | 1572 | remove_dirty_inode(inode); |
d68f735b | 1573 | submitted = NULL; |
0c3a5797 CY |
1574 | } |
1575 | ||
eb47b800 | 1576 | unlock_page(page); |
a7881893 JK |
1577 | if (!S_ISDIR(inode->i_mode)) |
1578 | f2fs_balance_fs(sbi, need_balance_fs); | |
0c3a5797 | 1579 | |
d68f735b | 1580 | if (unlikely(f2fs_cp_error(sbi))) { |
b9109b0e | 1581 | f2fs_submit_merged_write(sbi, DATA); |
d68f735b JK |
1582 | submitted = NULL; |
1583 | } | |
1584 | ||
1585 | if (submitted) | |
1586 | *submitted = fio.submitted; | |
0c3a5797 | 1587 | |
eb47b800 JK |
1588 | return 0; |
1589 | ||
eb47b800 | 1590 | redirty_out: |
76f60268 | 1591 | redirty_page_for_writepage(wbc, page); |
0002b61b CY |
1592 | if (!err) |
1593 | return AOP_WRITEPAGE_ACTIVATE; | |
b230e6ca JK |
1594 | unlock_page(page); |
1595 | return err; | |
fa9150a8 NJ |
1596 | } |
1597 | ||
f566bae8 JK |
1598 | static int f2fs_write_data_page(struct page *page, |
1599 | struct writeback_control *wbc) | |
1600 | { | |
d68f735b | 1601 | return __write_data_page(page, NULL, wbc); |
f566bae8 JK |
1602 | } |
1603 | ||
8f46dcae CY |
1604 | /* |
1605 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1606 | * The major change is making write step of cold data page separately from | |
1607 | * warm/hot data page. | |
1608 | */ | |
1609 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b230e6ca | 1610 | struct writeback_control *wbc) |
8f46dcae CY |
1611 | { |
1612 | int ret = 0; | |
1613 | int done = 0; | |
1614 | struct pagevec pvec; | |
1615 | int nr_pages; | |
1616 | pgoff_t uninitialized_var(writeback_index); | |
1617 | pgoff_t index; | |
1618 | pgoff_t end; /* Inclusive */ | |
1619 | pgoff_t done_index; | |
942fd319 | 1620 | pgoff_t last_idx = ULONG_MAX; |
8f46dcae CY |
1621 | int cycled; |
1622 | int range_whole = 0; | |
1623 | int tag; | |
8f46dcae CY |
1624 | |
1625 | pagevec_init(&pvec, 0); | |
46ae957f | 1626 | |
ef095d19 JK |
1627 | if (get_dirty_pages(mapping->host) <= |
1628 | SM_I(F2FS_M_SB(mapping))->min_hot_blocks) | |
1629 | set_inode_flag(mapping->host, FI_HOT_DATA); | |
1630 | else | |
1631 | clear_inode_flag(mapping->host, FI_HOT_DATA); | |
1632 | ||
8f46dcae CY |
1633 | if (wbc->range_cyclic) { |
1634 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1635 | index = writeback_index; | |
1636 | if (index == 0) | |
1637 | cycled = 1; | |
1638 | else | |
1639 | cycled = 0; | |
1640 | end = -1; | |
1641 | } else { | |
09cbfeaf KS |
1642 | index = wbc->range_start >> PAGE_SHIFT; |
1643 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1644 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1645 | range_whole = 1; | |
1646 | cycled = 1; /* ignore range_cyclic tests */ | |
1647 | } | |
1648 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1649 | tag = PAGECACHE_TAG_TOWRITE; | |
1650 | else | |
1651 | tag = PAGECACHE_TAG_DIRTY; | |
1652 | retry: | |
1653 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1654 | tag_pages_for_writeback(mapping, index, end); | |
1655 | done_index = index; | |
1656 | while (!done && (index <= end)) { | |
1657 | int i; | |
1658 | ||
1659 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1660 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1661 | if (nr_pages == 0) | |
1662 | break; | |
1663 | ||
1664 | for (i = 0; i < nr_pages; i++) { | |
1665 | struct page *page = pvec.pages[i]; | |
d68f735b | 1666 | bool submitted = false; |
8f46dcae CY |
1667 | |
1668 | if (page->index > end) { | |
1669 | done = 1; | |
1670 | break; | |
1671 | } | |
1672 | ||
1673 | done_index = page->index; | |
d29460e5 | 1674 | retry_write: |
8f46dcae CY |
1675 | lock_page(page); |
1676 | ||
1677 | if (unlikely(page->mapping != mapping)) { | |
1678 | continue_unlock: | |
1679 | unlock_page(page); | |
1680 | continue; | |
1681 | } | |
1682 | ||
1683 | if (!PageDirty(page)) { | |
1684 | /* someone wrote it for us */ | |
1685 | goto continue_unlock; | |
1686 | } | |
1687 | ||
8f46dcae CY |
1688 | if (PageWriteback(page)) { |
1689 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1690 | f2fs_wait_on_page_writeback(page, |
1691 | DATA, true); | |
8f46dcae CY |
1692 | else |
1693 | goto continue_unlock; | |
1694 | } | |
1695 | ||
1696 | BUG_ON(PageWriteback(page)); | |
1697 | if (!clear_page_dirty_for_io(page)) | |
1698 | goto continue_unlock; | |
1699 | ||
d68f735b | 1700 | ret = __write_data_page(page, &submitted, wbc); |
8f46dcae | 1701 | if (unlikely(ret)) { |
0002b61b CY |
1702 | /* |
1703 | * keep nr_to_write, since vfs uses this to | |
1704 | * get # of written pages. | |
1705 | */ | |
1706 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1707 | unlock_page(page); | |
1708 | ret = 0; | |
1709 | continue; | |
d29460e5 JK |
1710 | } else if (ret == -EAGAIN) { |
1711 | ret = 0; | |
1712 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
1713 | cond_resched(); | |
1714 | congestion_wait(BLK_RW_ASYNC, | |
1715 | HZ/50); | |
1716 | goto retry_write; | |
1717 | } | |
1718 | continue; | |
0002b61b | 1719 | } |
b230e6ca JK |
1720 | done_index = page->index + 1; |
1721 | done = 1; | |
1722 | break; | |
d68f735b | 1723 | } else if (submitted) { |
942fd319 | 1724 | last_idx = page->index; |
8f46dcae CY |
1725 | } |
1726 | ||
687de7f1 JK |
1727 | /* give a priority to WB_SYNC threads */ |
1728 | if ((atomic_read(&F2FS_M_SB(mapping)->wb_sync_req) || | |
1729 | --wbc->nr_to_write <= 0) && | |
1730 | wbc->sync_mode == WB_SYNC_NONE) { | |
8f46dcae CY |
1731 | done = 1; |
1732 | break; | |
1733 | } | |
1734 | } | |
1735 | pagevec_release(&pvec); | |
1736 | cond_resched(); | |
1737 | } | |
1738 | ||
8f46dcae CY |
1739 | if (!cycled && !done) { |
1740 | cycled = 1; | |
1741 | index = 0; | |
1742 | end = writeback_index - 1; | |
1743 | goto retry; | |
1744 | } | |
1745 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1746 | mapping->writeback_index = done_index; | |
1747 | ||
942fd319 | 1748 | if (last_idx != ULONG_MAX) |
b9109b0e JK |
1749 | f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host, |
1750 | 0, last_idx, DATA); | |
6ca56ca4 | 1751 | |
8f46dcae CY |
1752 | return ret; |
1753 | } | |
1754 | ||
25ca923b | 1755 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1756 | struct writeback_control *wbc) |
1757 | { | |
1758 | struct inode *inode = mapping->host; | |
4081363f | 1759 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 1760 | struct blk_plug plug; |
eb47b800 | 1761 | int ret; |
eb47b800 | 1762 | |
cfb185a1 | 1763 | /* deal with chardevs and other special file */ |
1764 | if (!mapping->a_ops->writepage) | |
1765 | return 0; | |
1766 | ||
6a290544 CY |
1767 | /* skip writing if there is no dirty page in this inode */ |
1768 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1769 | return 0; | |
1770 | ||
0771fcc7 CY |
1771 | /* during POR, we don't need to trigger writepage at all. */ |
1772 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1773 | goto skip_write; | |
1774 | ||
a1257023 JK |
1775 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1776 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1777 | available_free_memory(sbi, DIRTY_DENTS)) | |
1778 | goto skip_write; | |
1779 | ||
d323d005 | 1780 | /* skip writing during file defragment */ |
91942321 | 1781 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
1782 | goto skip_write; |
1783 | ||
d31c7c3f YH |
1784 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1785 | ||
687de7f1 JK |
1786 | /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */ |
1787 | if (wbc->sync_mode == WB_SYNC_ALL) | |
1788 | atomic_inc(&sbi->wb_sync_req); | |
1789 | else if (atomic_read(&sbi->wb_sync_req)) | |
1790 | goto skip_write; | |
1791 | ||
9dfa1baf | 1792 | blk_start_plug(&plug); |
b230e6ca | 1793 | ret = f2fs_write_cache_pages(mapping, wbc); |
9dfa1baf | 1794 | blk_finish_plug(&plug); |
687de7f1 JK |
1795 | |
1796 | if (wbc->sync_mode == WB_SYNC_ALL) | |
1797 | atomic_dec(&sbi->wb_sync_req); | |
28ea6162 JK |
1798 | /* |
1799 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1800 | * to detect pending bios. | |
1801 | */ | |
458e6197 | 1802 | |
c227f912 | 1803 | remove_dirty_inode(inode); |
eb47b800 | 1804 | return ret; |
d3baf95d JK |
1805 | |
1806 | skip_write: | |
a7ffdbe2 | 1807 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1808 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1809 | return 0; |
eb47b800 JK |
1810 | } |
1811 | ||
3aab8f82 CY |
1812 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1813 | { | |
1814 | struct inode *inode = mapping->host; | |
819d9153 | 1815 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1816 | |
819d9153 | 1817 | if (to > i_size) { |
5a3a2d83 | 1818 | down_write(&F2FS_I(inode)->i_mmap_sem); |
819d9153 JK |
1819 | truncate_pagecache(inode, i_size); |
1820 | truncate_blocks(inode, i_size, true); | |
5a3a2d83 | 1821 | up_write(&F2FS_I(inode)->i_mmap_sem); |
3aab8f82 CY |
1822 | } |
1823 | } | |
1824 | ||
2aadac08 JK |
1825 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1826 | struct page *page, loff_t pos, unsigned len, | |
1827 | block_t *blk_addr, bool *node_changed) | |
1828 | { | |
1829 | struct inode *inode = page->mapping->host; | |
1830 | pgoff_t index = page->index; | |
1831 | struct dnode_of_data dn; | |
1832 | struct page *ipage; | |
b4d07a3e | 1833 | bool locked = false; |
e15882b6 | 1834 | struct extent_info ei = {0,0,0}; |
2aadac08 JK |
1835 | int err = 0; |
1836 | ||
24b84912 JK |
1837 | /* |
1838 | * we already allocated all the blocks, so we don't need to get | |
1839 | * the block addresses when there is no need to fill the page. | |
1840 | */ | |
dc91de78 JK |
1841 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE && |
1842 | !is_inode_flag_set(inode, FI_NO_PREALLOC)) | |
24b84912 JK |
1843 | return 0; |
1844 | ||
b4d07a3e | 1845 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1846 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
59c9081b | 1847 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true); |
b4d07a3e JK |
1848 | locked = true; |
1849 | } | |
1850 | restart: | |
2aadac08 JK |
1851 | /* check inline_data */ |
1852 | ipage = get_node_page(sbi, inode->i_ino); | |
1853 | if (IS_ERR(ipage)) { | |
1854 | err = PTR_ERR(ipage); | |
1855 | goto unlock_out; | |
1856 | } | |
1857 | ||
1858 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1859 | ||
1860 | if (f2fs_has_inline_data(inode)) { | |
1861 | if (pos + len <= MAX_INLINE_DATA) { | |
1862 | read_inline_data(page, ipage); | |
91942321 | 1863 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
1864 | if (inode->i_nlink) |
1865 | set_inline_node(ipage); | |
2aadac08 JK |
1866 | } else { |
1867 | err = f2fs_convert_inline_page(&dn, page); | |
1868 | if (err) | |
b4d07a3e JK |
1869 | goto out; |
1870 | if (dn.data_blkaddr == NULL_ADDR) | |
1871 | err = f2fs_get_block(&dn, index); | |
1872 | } | |
1873 | } else if (locked) { | |
1874 | err = f2fs_get_block(&dn, index); | |
1875 | } else { | |
1876 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1877 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1878 | } else { | |
b4d07a3e JK |
1879 | /* hole case */ |
1880 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1881 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e | 1882 | f2fs_put_dnode(&dn); |
59c9081b YH |
1883 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, |
1884 | true); | |
b4d07a3e JK |
1885 | locked = true; |
1886 | goto restart; | |
1887 | } | |
2aadac08 JK |
1888 | } |
1889 | } | |
b4d07a3e | 1890 | |
2aadac08 JK |
1891 | /* convert_inline_page can make node_changed */ |
1892 | *blk_addr = dn.data_blkaddr; | |
1893 | *node_changed = dn.node_changed; | |
b4d07a3e | 1894 | out: |
2aadac08 JK |
1895 | f2fs_put_dnode(&dn); |
1896 | unlock_out: | |
b4d07a3e | 1897 | if (locked) |
59c9081b | 1898 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false); |
2aadac08 JK |
1899 | return err; |
1900 | } | |
1901 | ||
eb47b800 JK |
1902 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1903 | loff_t pos, unsigned len, unsigned flags, | |
1904 | struct page **pagep, void **fsdata) | |
1905 | { | |
1906 | struct inode *inode = mapping->host; | |
4081363f | 1907 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1908 | struct page *page = NULL; |
09cbfeaf | 1909 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1910 | bool need_balance = false; |
1911 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1912 | int err = 0; |
1913 | ||
62aed044 CY |
1914 | trace_f2fs_write_begin(inode, pos, len, flags); |
1915 | ||
5f727395 JK |
1916 | /* |
1917 | * We should check this at this moment to avoid deadlock on inode page | |
1918 | * and #0 page. The locking rule for inline_data conversion should be: | |
1919 | * lock_page(page #0) -> lock_page(inode_page) | |
1920 | */ | |
1921 | if (index != 0) { | |
1922 | err = f2fs_convert_inline_inode(inode); | |
1923 | if (err) | |
1924 | goto fail; | |
1925 | } | |
afcb7ca0 | 1926 | repeat: |
86d54795 JK |
1927 | /* |
1928 | * Do not use grab_cache_page_write_begin() to avoid deadlock due to | |
1929 | * wait_for_stable_page. Will wait that below with our IO control. | |
1930 | */ | |
1931 | page = pagecache_get_page(mapping, index, | |
1932 | FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS); | |
3aab8f82 CY |
1933 | if (!page) { |
1934 | err = -ENOMEM; | |
1935 | goto fail; | |
1936 | } | |
d5f66990 | 1937 | |
eb47b800 JK |
1938 | *pagep = page; |
1939 | ||
2aadac08 JK |
1940 | err = prepare_write_begin(sbi, page, pos, len, |
1941 | &blkaddr, &need_balance); | |
9ba69cf9 | 1942 | if (err) |
2aadac08 | 1943 | goto fail; |
9ba69cf9 | 1944 | |
7f3037a5 | 1945 | if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) { |
2a340760 | 1946 | unlock_page(page); |
2c4db1a6 | 1947 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1948 | lock_page(page); |
1949 | if (page->mapping != mapping) { | |
1950 | /* The page got truncated from under us */ | |
1951 | f2fs_put_page(page, 1); | |
1952 | goto repeat; | |
1953 | } | |
1954 | } | |
1955 | ||
fec1d657 | 1956 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1957 | |
08b39fbd CY |
1958 | /* wait for GCed encrypted page writeback */ |
1959 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1960 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1961 | |
649d7df2 JK |
1962 | if (len == PAGE_SIZE || PageUptodate(page)) |
1963 | return 0; | |
eb47b800 | 1964 | |
746e2403 YH |
1965 | if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) { |
1966 | zero_user_segment(page, len, PAGE_SIZE); | |
1967 | return 0; | |
1968 | } | |
1969 | ||
2aadac08 | 1970 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1971 | zero_user_segment(page, 0, PAGE_SIZE); |
649d7df2 | 1972 | SetPageUptodate(page); |
eb47b800 | 1973 | } else { |
78682f79 | 1974 | struct bio *bio; |
d54c795b | 1975 | |
78682f79 CY |
1976 | bio = f2fs_grab_bio(inode, blkaddr, 1); |
1977 | if (IS_ERR(bio)) { | |
1978 | err = PTR_ERR(bio); | |
3aab8f82 | 1979 | goto fail; |
eb47b800 | 1980 | } |
70fd7614 | 1981 | bio->bi_opf = REQ_OP_READ; |
78682f79 CY |
1982 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
1983 | bio_put(bio); | |
1984 | err = -EFAULT; | |
1985 | goto fail; | |
1986 | } | |
1987 | ||
4fc29c1a | 1988 | __submit_bio(sbi, bio, DATA); |
d54c795b | 1989 | |
393ff91f | 1990 | lock_page(page); |
6bacf52f | 1991 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1992 | f2fs_put_page(page, 1); |
1993 | goto repeat; | |
eb47b800 | 1994 | } |
1563ac75 CY |
1995 | if (unlikely(!PageUptodate(page))) { |
1996 | err = -EIO; | |
1997 | goto fail; | |
4375a336 | 1998 | } |
eb47b800 | 1999 | } |
eb47b800 | 2000 | return 0; |
9ba69cf9 | 2001 | |
3aab8f82 | 2002 | fail: |
86531d6b | 2003 | f2fs_put_page(page, 1); |
3aab8f82 CY |
2004 | f2fs_write_failed(mapping, pos + len); |
2005 | return err; | |
eb47b800 JK |
2006 | } |
2007 | ||
a1dd3c13 JK |
2008 | static int f2fs_write_end(struct file *file, |
2009 | struct address_space *mapping, | |
2010 | loff_t pos, unsigned len, unsigned copied, | |
2011 | struct page *page, void *fsdata) | |
2012 | { | |
2013 | struct inode *inode = page->mapping->host; | |
2014 | ||
dfb2bf38 CY |
2015 | trace_f2fs_write_end(inode, pos, len, copied); |
2016 | ||
649d7df2 JK |
2017 | /* |
2018 | * This should be come from len == PAGE_SIZE, and we expect copied | |
2019 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
2020 | * let generic_perform_write() try to copy data again through copied=0. | |
2021 | */ | |
2022 | if (!PageUptodate(page)) { | |
746e2403 | 2023 | if (unlikely(copied != len)) |
649d7df2 JK |
2024 | copied = 0; |
2025 | else | |
2026 | SetPageUptodate(page); | |
2027 | } | |
2028 | if (!copied) | |
2029 | goto unlock_out; | |
2030 | ||
34ba94ba | 2031 | set_page_dirty(page); |
a1dd3c13 | 2032 | |
fc9581c8 JK |
2033 | if (pos + copied > i_size_read(inode)) |
2034 | f2fs_i_size_write(inode, pos + copied); | |
649d7df2 | 2035 | unlock_out: |
3024c9a1 | 2036 | f2fs_put_page(page, 1); |
d0239e1b | 2037 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
2038 | return copied; |
2039 | } | |
2040 | ||
6f673763 OS |
2041 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
2042 | loff_t offset) | |
944fcfc1 JK |
2043 | { |
2044 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 2045 | |
944fcfc1 JK |
2046 | if (offset & blocksize_mask) |
2047 | return -EINVAL; | |
2048 | ||
5b46f25d AV |
2049 | if (iov_iter_alignment(iter) & blocksize_mask) |
2050 | return -EINVAL; | |
2051 | ||
944fcfc1 JK |
2052 | return 0; |
2053 | } | |
2054 | ||
c8b8e32d | 2055 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 2056 | { |
b439b103 | 2057 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
2058 | struct inode *inode = mapping->host; |
2059 | size_t count = iov_iter_count(iter); | |
c8b8e32d | 2060 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 2061 | int rw = iov_iter_rw(iter); |
3aab8f82 | 2062 | int err; |
944fcfc1 | 2063 | |
b439b103 | 2064 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
2065 | if (err) |
2066 | return err; | |
9ffe0fb5 | 2067 | |
c040ff9d | 2068 | if (__force_buffered_io(inode, rw)) |
36abef4e | 2069 | return 0; |
fcc85a4d | 2070 | |
5302fb00 | 2071 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 2072 | |
82e0a5aa | 2073 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
c8b8e32d | 2074 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
82e0a5aa CY |
2075 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
2076 | ||
2077 | if (rw == WRITE) { | |
6bfc4919 | 2078 | if (err > 0) |
91942321 | 2079 | set_inode_flag(inode, FI_UPDATE_WRITE); |
6bfc4919 JK |
2080 | else if (err < 0) |
2081 | f2fs_write_failed(mapping, offset + count); | |
2082 | } | |
70407fad | 2083 | |
5302fb00 | 2084 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 2085 | |
3aab8f82 | 2086 | return err; |
eb47b800 JK |
2087 | } |
2088 | ||
487261f3 CY |
2089 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
2090 | unsigned int length) | |
eb47b800 JK |
2091 | { |
2092 | struct inode *inode = page->mapping->host; | |
487261f3 | 2093 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 2094 | |
487261f3 | 2095 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 2096 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
2097 | return; |
2098 | ||
487261f3 | 2099 | if (PageDirty(page)) { |
933439c8 | 2100 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 2101 | dec_page_count(sbi, F2FS_DIRTY_META); |
933439c8 | 2102 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 2103 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
933439c8 | 2104 | } else { |
487261f3 | 2105 | inode_dec_dirty_pages(inode); |
933439c8 CY |
2106 | remove_dirty_inode(inode); |
2107 | } | |
487261f3 | 2108 | } |
decd36b6 CY |
2109 | |
2110 | /* This is atomic written page, keep Private */ | |
2111 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
8c242db9 | 2112 | return drop_inmem_page(inode, page); |
decd36b6 | 2113 | |
23dc974e | 2114 | set_page_private(page, 0); |
eb47b800 JK |
2115 | ClearPagePrivate(page); |
2116 | } | |
2117 | ||
487261f3 | 2118 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 2119 | { |
f68daeeb JK |
2120 | /* If this is dirty page, keep PagePrivate */ |
2121 | if (PageDirty(page)) | |
2122 | return 0; | |
2123 | ||
decd36b6 CY |
2124 | /* This is atomic written page, keep Private */ |
2125 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
2126 | return 0; | |
2127 | ||
23dc974e | 2128 | set_page_private(page, 0); |
eb47b800 | 2129 | ClearPagePrivate(page); |
c3850aa1 | 2130 | return 1; |
eb47b800 JK |
2131 | } |
2132 | ||
fe76b796 JK |
2133 | /* |
2134 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
2135 | * in very high speed storages. (e.g., pmem) | |
2136 | */ | |
2137 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
2138 | { | |
2139 | struct address_space *mapping = page->mapping; | |
2140 | unsigned long flags; | |
2141 | ||
2142 | if (unlikely(!mapping)) | |
2143 | return; | |
2144 | ||
2145 | spin_lock(&mapping->private_lock); | |
2146 | lock_page_memcg(page); | |
2147 | SetPageDirty(page); | |
2148 | spin_unlock(&mapping->private_lock); | |
2149 | ||
2150 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
2151 | WARN_ON_ONCE(!PageUptodate(page)); | |
2152 | account_page_dirtied(page, mapping); | |
2153 | radix_tree_tag_set(&mapping->page_tree, | |
2154 | page_index(page), PAGECACHE_TAG_DIRTY); | |
2155 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
2156 | unlock_page_memcg(page); | |
2157 | ||
2158 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
2159 | return; | |
2160 | } | |
2161 | ||
eb47b800 JK |
2162 | static int f2fs_set_data_page_dirty(struct page *page) |
2163 | { | |
2164 | struct address_space *mapping = page->mapping; | |
2165 | struct inode *inode = mapping->host; | |
2166 | ||
26c6b887 JK |
2167 | trace_f2fs_set_page_dirty(page, DATA); |
2168 | ||
237c0790 JK |
2169 | if (!PageUptodate(page)) |
2170 | SetPageUptodate(page); | |
34ba94ba | 2171 | |
5fe45743 | 2172 | if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) { |
decd36b6 CY |
2173 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
2174 | register_inmem_page(inode, page); | |
2175 | return 1; | |
2176 | } | |
2177 | /* | |
2178 | * Previously, this page has been registered, we just | |
2179 | * return here. | |
2180 | */ | |
2181 | return 0; | |
34ba94ba JK |
2182 | } |
2183 | ||
eb47b800 | 2184 | if (!PageDirty(page)) { |
fe76b796 | 2185 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 2186 | update_dirty_page(inode, page); |
eb47b800 JK |
2187 | return 1; |
2188 | } | |
2189 | return 0; | |
2190 | } | |
2191 | ||
c01e54b7 JK |
2192 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
2193 | { | |
454ae7e5 CY |
2194 | struct inode *inode = mapping->host; |
2195 | ||
1d373a0e JK |
2196 | if (f2fs_has_inline_data(inode)) |
2197 | return 0; | |
2198 | ||
2199 | /* make sure allocating whole blocks */ | |
2200 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
2201 | filemap_write_and_wait(mapping); | |
2202 | ||
e2b4e2bc | 2203 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
2204 | } |
2205 | ||
5b7a487c WG |
2206 | #ifdef CONFIG_MIGRATION |
2207 | #include <linux/migrate.h> | |
2208 | ||
2209 | int f2fs_migrate_page(struct address_space *mapping, | |
2210 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
2211 | { | |
2212 | int rc, extra_count; | |
2213 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
2214 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
2215 | ||
2216 | BUG_ON(PageWriteback(page)); | |
2217 | ||
2218 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
ff1048e7 JK |
2219 | if (atomic_written) { |
2220 | if (mode != MIGRATE_SYNC) | |
2221 | return -EBUSY; | |
2222 | if (!mutex_trylock(&fi->inmem_lock)) | |
2223 | return -EAGAIN; | |
2224 | } | |
5b7a487c WG |
2225 | |
2226 | /* | |
2227 | * A reference is expected if PagePrivate set when move mapping, | |
2228 | * however F2FS breaks this for maintaining dirty page counts when | |
2229 | * truncating pages. So here adjusting the 'extra_count' make it work. | |
2230 | */ | |
2231 | extra_count = (atomic_written ? 1 : 0) - page_has_private(page); | |
2232 | rc = migrate_page_move_mapping(mapping, newpage, | |
2233 | page, NULL, mode, extra_count); | |
2234 | if (rc != MIGRATEPAGE_SUCCESS) { | |
2235 | if (atomic_written) | |
2236 | mutex_unlock(&fi->inmem_lock); | |
2237 | return rc; | |
2238 | } | |
2239 | ||
2240 | if (atomic_written) { | |
2241 | struct inmem_pages *cur; | |
2242 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
2243 | if (cur->page == page) { | |
2244 | cur->page = newpage; | |
2245 | break; | |
2246 | } | |
2247 | mutex_unlock(&fi->inmem_lock); | |
2248 | put_page(page); | |
2249 | get_page(newpage); | |
2250 | } | |
2251 | ||
2252 | if (PagePrivate(page)) | |
2253 | SetPagePrivate(newpage); | |
2254 | set_page_private(newpage, page_private(page)); | |
2255 | ||
2256 | migrate_page_copy(newpage, page); | |
2257 | ||
2258 | return MIGRATEPAGE_SUCCESS; | |
2259 | } | |
2260 | #endif | |
2261 | ||
eb47b800 JK |
2262 | const struct address_space_operations f2fs_dblock_aops = { |
2263 | .readpage = f2fs_read_data_page, | |
2264 | .readpages = f2fs_read_data_pages, | |
2265 | .writepage = f2fs_write_data_page, | |
2266 | .writepages = f2fs_write_data_pages, | |
2267 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 2268 | .write_end = f2fs_write_end, |
eb47b800 | 2269 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
2270 | .invalidatepage = f2fs_invalidate_page, |
2271 | .releasepage = f2fs_release_page, | |
eb47b800 | 2272 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 2273 | .bmap = f2fs_bmap, |
5b7a487c WG |
2274 | #ifdef CONFIG_MIGRATION |
2275 | .migratepage = f2fs_migrate_page, | |
2276 | #endif | |
eb47b800 | 2277 | }; |