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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> |
eb47b800 JK |
23 | |
24 | #include "f2fs.h" | |
25 | #include "node.h" | |
26 | #include "segment.h" | |
db9f7c1a | 27 | #include "trace.h" |
848753aa | 28 | #include <trace/events/f2fs.h> |
eb47b800 | 29 | |
4246a0b6 | 30 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 31 | { |
f568849e LT |
32 | struct bio_vec *bvec; |
33 | int i; | |
93dfe2ac | 34 | |
4375a336 | 35 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 36 | if (bio->bi_error) { |
4375a336 JK |
37 | f2fs_release_crypto_ctx(bio->bi_private); |
38 | } else { | |
39 | f2fs_end_io_crypto_work(bio->bi_private, bio); | |
40 | return; | |
41 | } | |
42 | } | |
43 | ||
12377024 CY |
44 | bio_for_each_segment_all(bvec, bio, i) { |
45 | struct page *page = bvec->bv_page; | |
f1e88660 | 46 | |
4246a0b6 | 47 | if (!bio->bi_error) { |
f1e88660 JK |
48 | SetPageUptodate(page); |
49 | } else { | |
50 | ClearPageUptodate(page); | |
51 | SetPageError(page); | |
52 | } | |
53 | unlock_page(page); | |
54 | } | |
f1e88660 JK |
55 | bio_put(bio); |
56 | } | |
57 | ||
4246a0b6 | 58 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 59 | { |
1b1f559f | 60 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
61 | struct bio_vec *bvec; |
62 | int i; | |
93dfe2ac | 63 | |
f568849e | 64 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
65 | struct page *page = bvec->bv_page; |
66 | ||
4375a336 JK |
67 | f2fs_restore_and_release_control_page(&page); |
68 | ||
4246a0b6 | 69 | if (unlikely(bio->bi_error)) { |
93dfe2ac | 70 | set_bit(AS_EIO, &page->mapping->flags); |
744602cf | 71 | f2fs_stop_checkpoint(sbi); |
93dfe2ac JK |
72 | } |
73 | end_page_writeback(page); | |
74 | dec_page_count(sbi, F2FS_WRITEBACK); | |
f568849e | 75 | } |
93dfe2ac | 76 | |
7c506896 | 77 | if (!get_pages(sbi, F2FS_WRITEBACK) && wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
78 | wake_up(&sbi->cp_wait); |
79 | ||
80 | bio_put(bio); | |
81 | } | |
82 | ||
940a6d34 GZ |
83 | /* |
84 | * Low-level block read/write IO operations. | |
85 | */ | |
86 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
87 | int npages, bool is_read) | |
88 | { | |
89 | struct bio *bio; | |
90 | ||
740432f8 | 91 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
92 | |
93 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 94 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 95 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 96 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
97 | |
98 | return bio; | |
99 | } | |
100 | ||
458e6197 | 101 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 102 | { |
458e6197 | 103 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
104 | |
105 | if (!io->bio) | |
106 | return; | |
107 | ||
6a8f8ca5 | 108 | if (is_read_io(fio->rw)) |
2ace38e0 | 109 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 110 | else |
2ace38e0 | 111 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 112 | |
6a8f8ca5 | 113 | submit_bio(fio->rw, io->bio); |
93dfe2ac JK |
114 | io->bio = NULL; |
115 | } | |
116 | ||
0c3a5797 CY |
117 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
118 | struct page *page, nid_t ino) | |
0fd785eb | 119 | { |
0fd785eb CY |
120 | struct bio_vec *bvec; |
121 | struct page *target; | |
122 | int i; | |
123 | ||
0c3a5797 | 124 | if (!io->bio) |
0fd785eb | 125 | return false; |
0c3a5797 CY |
126 | |
127 | if (!inode && !page && !ino) | |
128 | return true; | |
0fd785eb CY |
129 | |
130 | bio_for_each_segment_all(bvec, io->bio, i) { | |
131 | ||
132 | if (bvec->bv_page->mapping) { | |
133 | target = bvec->bv_page; | |
134 | } else { | |
135 | struct f2fs_crypto_ctx *ctx; | |
136 | ||
137 | /* encrypted page */ | |
138 | ctx = (struct f2fs_crypto_ctx *)page_private( | |
139 | bvec->bv_page); | |
140 | target = ctx->w.control_page; | |
141 | } | |
142 | ||
0c3a5797 CY |
143 | if (inode && inode == target->mapping->host) |
144 | return true; | |
145 | if (page && page == target) | |
146 | return true; | |
147 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 148 | return true; |
0fd785eb CY |
149 | } |
150 | ||
0fd785eb CY |
151 | return false; |
152 | } | |
153 | ||
0c3a5797 CY |
154 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
155 | struct page *page, nid_t ino, | |
156 | enum page_type type) | |
157 | { | |
158 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
159 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
160 | bool ret; | |
161 | ||
162 | down_read(&io->io_rwsem); | |
163 | ret = __has_merged_page(io, inode, page, ino); | |
164 | up_read(&io->io_rwsem); | |
165 | return ret; | |
166 | } | |
167 | ||
168 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
169 | struct inode *inode, struct page *page, | |
170 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
171 | { |
172 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
173 | struct f2fs_bio_info *io; | |
174 | ||
175 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
176 | ||
df0f8dc0 | 177 | down_write(&io->io_rwsem); |
458e6197 | 178 | |
0c3a5797 CY |
179 | if (!__has_merged_page(io, inode, page, ino)) |
180 | goto out; | |
181 | ||
458e6197 JK |
182 | /* change META to META_FLUSH in the checkpoint procedure */ |
183 | if (type >= META_FLUSH) { | |
184 | io->fio.type = META_FLUSH; | |
0f7b2abd JK |
185 | if (test_opt(sbi, NOBARRIER)) |
186 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
187 | else | |
188 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; | |
458e6197 JK |
189 | } |
190 | __submit_merged_bio(io); | |
0c3a5797 | 191 | out: |
df0f8dc0 | 192 | up_write(&io->io_rwsem); |
93dfe2ac JK |
193 | } |
194 | ||
0c3a5797 CY |
195 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
196 | int rw) | |
197 | { | |
198 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
199 | } | |
200 | ||
201 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
202 | struct inode *inode, struct page *page, | |
203 | nid_t ino, enum page_type type, int rw) | |
204 | { | |
205 | if (has_merged_page(sbi, inode, page, ino, type)) | |
206 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
207 | } | |
208 | ||
93dfe2ac JK |
209 | /* |
210 | * Fill the locked page with data located in the block address. | |
211 | * Return unlocked page. | |
212 | */ | |
05ca3632 | 213 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 214 | { |
93dfe2ac | 215 | struct bio *bio; |
4375a336 | 216 | struct page *page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
93dfe2ac | 217 | |
2ace38e0 | 218 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 219 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
220 | |
221 | /* Allocate a new bio */ | |
7a9d7548 | 222 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->rw)); |
93dfe2ac JK |
223 | |
224 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
225 | bio_put(bio); | |
93dfe2ac JK |
226 | return -EFAULT; |
227 | } | |
228 | ||
cf04e8eb | 229 | submit_bio(fio->rw, bio); |
93dfe2ac JK |
230 | return 0; |
231 | } | |
232 | ||
05ca3632 | 233 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 234 | { |
05ca3632 | 235 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 236 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 237 | struct f2fs_bio_info *io; |
940a6d34 | 238 | bool is_read = is_read_io(fio->rw); |
4375a336 | 239 | struct page *bio_page; |
93dfe2ac | 240 | |
940a6d34 | 241 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 242 | |
7a9d7548 CY |
243 | if (fio->old_blkaddr != NEW_ADDR) |
244 | verify_block_addr(sbi, fio->old_blkaddr); | |
245 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 246 | |
df0f8dc0 | 247 | down_write(&io->io_rwsem); |
93dfe2ac | 248 | |
940a6d34 | 249 | if (!is_read) |
93dfe2ac JK |
250 | inc_page_count(sbi, F2FS_WRITEBACK); |
251 | ||
7a9d7548 | 252 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
458e6197 JK |
253 | io->fio.rw != fio->rw)) |
254 | __submit_merged_bio(io); | |
93dfe2ac JK |
255 | alloc_new: |
256 | if (io->bio == NULL) { | |
90a893c7 | 257 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 258 | |
7a9d7548 CY |
259 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
260 | bio_blocks, is_read); | |
458e6197 | 261 | io->fio = *fio; |
93dfe2ac JK |
262 | } |
263 | ||
4375a336 JK |
264 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
265 | ||
266 | if (bio_add_page(io->bio, bio_page, PAGE_CACHE_SIZE, 0) < | |
93dfe2ac | 267 | PAGE_CACHE_SIZE) { |
458e6197 | 268 | __submit_merged_bio(io); |
93dfe2ac JK |
269 | goto alloc_new; |
270 | } | |
271 | ||
7a9d7548 | 272 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 273 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 274 | |
df0f8dc0 | 275 | up_write(&io->io_rwsem); |
05ca3632 | 276 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
277 | } |
278 | ||
0a8165d7 | 279 | /* |
eb47b800 JK |
280 | * Lock ordering for the change of data block address: |
281 | * ->data_page | |
282 | * ->node_page | |
283 | * update block addresses in the node page | |
284 | */ | |
216a620a | 285 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 JK |
286 | { |
287 | struct f2fs_node *rn; | |
288 | __le32 *addr_array; | |
289 | struct page *node_page = dn->node_page; | |
290 | unsigned int ofs_in_node = dn->ofs_in_node; | |
291 | ||
fec1d657 | 292 | f2fs_wait_on_page_writeback(node_page, NODE, true); |
eb47b800 | 293 | |
45590710 | 294 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
295 | |
296 | /* Get physical address of data block */ | |
297 | addr_array = blkaddr_in_node(rn); | |
e1509cf2 | 298 | addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
12719ae1 JK |
299 | if (set_page_dirty(node_page)) |
300 | dn->node_changed = true; | |
eb47b800 JK |
301 | } |
302 | ||
303 | int reserve_new_block(struct dnode_of_data *dn) | |
304 | { | |
4081363f | 305 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 306 | |
6bacf52f | 307 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 308 | return -EPERM; |
cfb271d4 | 309 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
310 | return -ENOSPC; |
311 | ||
c01e2853 NJ |
312 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
313 | ||
eb47b800 | 314 | dn->data_blkaddr = NEW_ADDR; |
216a620a | 315 | set_data_blkaddr(dn); |
a18ff063 | 316 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
317 | sync_inode_page(dn); |
318 | return 0; | |
319 | } | |
320 | ||
b600965c HL |
321 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
322 | { | |
323 | bool need_put = dn->inode_page ? false : true; | |
324 | int err; | |
325 | ||
326 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
327 | if (err) | |
328 | return err; | |
a8865372 | 329 | |
b600965c HL |
330 | if (dn->data_blkaddr == NULL_ADDR) |
331 | err = reserve_new_block(dn); | |
a8865372 | 332 | if (err || need_put) |
b600965c HL |
333 | f2fs_put_dnode(dn); |
334 | return err; | |
335 | } | |
336 | ||
759af1c9 | 337 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 338 | { |
028a41e8 | 339 | struct extent_info ei; |
759af1c9 | 340 | struct inode *inode = dn->inode; |
028a41e8 | 341 | |
759af1c9 FL |
342 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
343 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
344 | return 0; | |
429511cd | 345 | } |
028a41e8 | 346 | |
759af1c9 | 347 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
348 | } |
349 | ||
a56c7c6f JK |
350 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
351 | int rw, bool for_write) | |
eb47b800 | 352 | { |
eb47b800 JK |
353 | struct address_space *mapping = inode->i_mapping; |
354 | struct dnode_of_data dn; | |
355 | struct page *page; | |
cb3bc9ee | 356 | struct extent_info ei; |
eb47b800 | 357 | int err; |
cf04e8eb | 358 | struct f2fs_io_info fio = { |
05ca3632 | 359 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 360 | .type = DATA, |
43f3eae1 | 361 | .rw = rw, |
4375a336 | 362 | .encrypted_page = NULL, |
cf04e8eb | 363 | }; |
eb47b800 | 364 | |
4375a336 JK |
365 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
366 | return read_mapping_page(mapping, index, NULL); | |
367 | ||
a56c7c6f | 368 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
369 | if (!page) |
370 | return ERR_PTR(-ENOMEM); | |
371 | ||
cb3bc9ee CY |
372 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
373 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
374 | goto got_it; | |
375 | } | |
376 | ||
eb47b800 | 377 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 378 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
379 | if (err) |
380 | goto put_err; | |
eb47b800 JK |
381 | f2fs_put_dnode(&dn); |
382 | ||
6bacf52f | 383 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
384 | err = -ENOENT; |
385 | goto put_err; | |
650495de | 386 | } |
cb3bc9ee | 387 | got_it: |
43f3eae1 JK |
388 | if (PageUptodate(page)) { |
389 | unlock_page(page); | |
eb47b800 | 390 | return page; |
43f3eae1 | 391 | } |
eb47b800 | 392 | |
d59ff4df JK |
393 | /* |
394 | * A new dentry page is allocated but not able to be written, since its | |
395 | * new inode page couldn't be allocated due to -ENOSPC. | |
396 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
397 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
398 | */ | |
399 | if (dn.data_blkaddr == NEW_ADDR) { | |
400 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
401 | SetPageUptodate(page); | |
43f3eae1 | 402 | unlock_page(page); |
d59ff4df JK |
403 | return page; |
404 | } | |
eb47b800 | 405 | |
7a9d7548 | 406 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
407 | fio.page = page; |
408 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 409 | if (err) |
86531d6b | 410 | goto put_err; |
43f3eae1 | 411 | return page; |
86531d6b JK |
412 | |
413 | put_err: | |
414 | f2fs_put_page(page, 1); | |
415 | return ERR_PTR(err); | |
43f3eae1 JK |
416 | } |
417 | ||
418 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
419 | { | |
420 | struct address_space *mapping = inode->i_mapping; | |
421 | struct page *page; | |
422 | ||
423 | page = find_get_page(mapping, index); | |
424 | if (page && PageUptodate(page)) | |
425 | return page; | |
426 | f2fs_put_page(page, 0); | |
427 | ||
a56c7c6f | 428 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
429 | if (IS_ERR(page)) |
430 | return page; | |
431 | ||
432 | if (PageUptodate(page)) | |
433 | return page; | |
434 | ||
435 | wait_on_page_locked(page); | |
436 | if (unlikely(!PageUptodate(page))) { | |
437 | f2fs_put_page(page, 0); | |
438 | return ERR_PTR(-EIO); | |
439 | } | |
440 | return page; | |
441 | } | |
442 | ||
443 | /* | |
444 | * If it tries to access a hole, return an error. | |
445 | * Because, the callers, functions in dir.c and GC, should be able to know | |
446 | * whether this page exists or not. | |
447 | */ | |
a56c7c6f JK |
448 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
449 | bool for_write) | |
43f3eae1 JK |
450 | { |
451 | struct address_space *mapping = inode->i_mapping; | |
452 | struct page *page; | |
453 | repeat: | |
a56c7c6f | 454 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
455 | if (IS_ERR(page)) |
456 | return page; | |
393ff91f | 457 | |
43f3eae1 | 458 | /* wait for read completion */ |
393ff91f | 459 | lock_page(page); |
6bacf52f | 460 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
461 | f2fs_put_page(page, 1); |
462 | return ERR_PTR(-EIO); | |
eb47b800 | 463 | } |
6bacf52f | 464 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
465 | f2fs_put_page(page, 1); |
466 | goto repeat; | |
eb47b800 JK |
467 | } |
468 | return page; | |
469 | } | |
470 | ||
0a8165d7 | 471 | /* |
eb47b800 JK |
472 | * Caller ensures that this data page is never allocated. |
473 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 474 | * |
4f4124d0 CY |
475 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
476 | * f2fs_unlock_op(). | |
470f00e9 CY |
477 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
478 | * ipage should be released by this function. | |
eb47b800 | 479 | */ |
64aa7ed9 | 480 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 481 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 482 | { |
eb47b800 JK |
483 | struct address_space *mapping = inode->i_mapping; |
484 | struct page *page; | |
485 | struct dnode_of_data dn; | |
486 | int err; | |
7612118a | 487 | |
a56c7c6f | 488 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
489 | if (!page) { |
490 | /* | |
491 | * before exiting, we should make sure ipage will be released | |
492 | * if any error occur. | |
493 | */ | |
494 | f2fs_put_page(ipage, 1); | |
01f28610 | 495 | return ERR_PTR(-ENOMEM); |
470f00e9 | 496 | } |
eb47b800 | 497 | |
a8865372 | 498 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 499 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
500 | if (err) { |
501 | f2fs_put_page(page, 1); | |
eb47b800 | 502 | return ERR_PTR(err); |
a8865372 | 503 | } |
01f28610 JK |
504 | if (!ipage) |
505 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
506 | |
507 | if (PageUptodate(page)) | |
01f28610 | 508 | goto got_it; |
eb47b800 JK |
509 | |
510 | if (dn.data_blkaddr == NEW_ADDR) { | |
511 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 512 | SetPageUptodate(page); |
eb47b800 | 513 | } else { |
4375a336 | 514 | f2fs_put_page(page, 1); |
a8865372 | 515 | |
7612118a JK |
516 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
517 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
518 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 519 | if (IS_ERR(page)) |
7612118a | 520 | return page; |
eb47b800 | 521 | } |
01f28610 | 522 | got_it: |
9edcdabf CY |
523 | if (new_i_size && i_size_read(inode) < |
524 | ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)) { | |
525 | i_size_write(inode, ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
526 | /* Only the directory inode sets new_i_size */ |
527 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
528 | } |
529 | return page; | |
530 | } | |
531 | ||
bfad7c2d JK |
532 | static int __allocate_data_block(struct dnode_of_data *dn) |
533 | { | |
4081363f | 534 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 535 | struct f2fs_summary sum; |
bfad7c2d | 536 | struct node_info ni; |
38aa0889 | 537 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 538 | pgoff_t fofs; |
bfad7c2d JK |
539 | |
540 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
541 | return -EPERM; | |
df6136ef CY |
542 | |
543 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
544 | if (dn->data_blkaddr == NEW_ADDR) | |
545 | goto alloc; | |
546 | ||
bfad7c2d JK |
547 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
548 | return -ENOSPC; | |
549 | ||
df6136ef | 550 | alloc: |
bfad7c2d JK |
551 | get_node_info(sbi, dn->nid, &ni); |
552 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
553 | ||
38aa0889 JK |
554 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
555 | seg = CURSEG_DIRECT_IO; | |
556 | ||
df6136ef CY |
557 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
558 | &sum, seg); | |
216a620a | 559 | set_data_blkaddr(dn); |
bfad7c2d | 560 | |
976e4c50 | 561 | /* update i_size */ |
81ca7350 | 562 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 563 | dn->ofs_in_node; |
9edcdabf CY |
564 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)) |
565 | i_size_write(dn->inode, | |
566 | ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)); | |
bfad7c2d JK |
567 | return 0; |
568 | } | |
569 | ||
b439b103 | 570 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 571 | { |
b439b103 | 572 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 573 | struct f2fs_map_blocks map; |
b439b103 | 574 | ssize_t ret = 0; |
59b802e5 | 575 | |
b439b103 | 576 | map.m_lblk = F2FS_BYTES_TO_BLK(iocb->ki_pos); |
24b84912 | 577 | map.m_len = F2FS_BLK_ALIGN(iov_iter_count(from)); |
da85985c | 578 | map.m_next_pgofs = NULL; |
2a340760 | 579 | |
24b84912 JK |
580 | if (f2fs_encrypted_inode(inode)) |
581 | return 0; | |
582 | ||
583 | if (iocb->ki_flags & IOCB_DIRECT) { | |
584 | ret = f2fs_convert_inline_inode(inode); | |
585 | if (ret) | |
586 | return ret; | |
587 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); | |
588 | } | |
589 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
b439b103 JK |
590 | ret = f2fs_convert_inline_inode(inode); |
591 | if (ret) | |
592 | return ret; | |
b439b103 | 593 | } |
24b84912 JK |
594 | if (!f2fs_has_inline_data(inode)) |
595 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
b439b103 | 596 | return ret; |
59b802e5 JK |
597 | } |
598 | ||
0a8165d7 | 599 | /* |
003a3e1d JK |
600 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
601 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
602 | * If original data blocks are allocated, then give them to blockdev. |
603 | * Otherwise, | |
604 | * a. preallocate requested block addresses | |
605 | * b. do not use extent cache for better performance | |
606 | * c. give the block addresses to blockdev | |
eb47b800 | 607 | */ |
d323d005 | 608 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 609 | int create, int flag) |
eb47b800 | 610 | { |
003a3e1d | 611 | unsigned int maxblocks = map->m_len; |
eb47b800 | 612 | struct dnode_of_data dn; |
f9811703 | 613 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
bfad7c2d JK |
614 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
615 | pgoff_t pgofs, end_offset; | |
616 | int err = 0, ofs = 1; | |
a2e7d1bf | 617 | struct extent_info ei; |
bfad7c2d | 618 | bool allocated = false; |
7df3a431 | 619 | block_t blkaddr; |
eb47b800 | 620 | |
003a3e1d JK |
621 | map->m_len = 0; |
622 | map->m_flags = 0; | |
623 | ||
624 | /* it only supports block size == page size */ | |
625 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 626 | |
24b84912 | 627 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
628 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
629 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
630 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 631 | goto out; |
a2e7d1bf | 632 | } |
bfad7c2d | 633 | |
4fe71e88 | 634 | next_dnode: |
59b802e5 | 635 | if (create) |
3104af35 | 636 | f2fs_lock_op(sbi); |
eb47b800 JK |
637 | |
638 | /* When reading holes, we need its node page */ | |
639 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 640 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 641 | if (err) { |
da85985c | 642 | if (err == -ENOENT) { |
bfad7c2d | 643 | err = 0; |
da85985c CY |
644 | if (map->m_next_pgofs) |
645 | *map->m_next_pgofs = | |
646 | get_next_page_offset(&dn, pgofs); | |
647 | } | |
bfad7c2d | 648 | goto unlock_out; |
848753aa | 649 | } |
973163fc | 650 | |
81ca7350 | 651 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
652 | |
653 | next_block: | |
654 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
655 | ||
656 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 657 | if (create) { |
f9811703 CY |
658 | if (unlikely(f2fs_cp_error(sbi))) { |
659 | err = -EIO; | |
4fe71e88 | 660 | goto sync_out; |
f9811703 | 661 | } |
24b84912 JK |
662 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
663 | if (blkaddr == NULL_ADDR) | |
664 | err = reserve_new_block(&dn); | |
665 | } else { | |
666 | err = __allocate_data_block(&dn); | |
667 | } | |
973163fc | 668 | if (err) |
4fe71e88 | 669 | goto sync_out; |
973163fc CY |
670 | allocated = true; |
671 | map->m_flags = F2FS_MAP_NEW; | |
4fe71e88 | 672 | blkaddr = dn.data_blkaddr; |
973163fc | 673 | } else { |
da85985c CY |
674 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
675 | blkaddr == NULL_ADDR) { | |
676 | if (map->m_next_pgofs) | |
677 | *map->m_next_pgofs = pgofs + 1; | |
678 | } | |
973163fc | 679 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
4fe71e88 | 680 | blkaddr != NEW_ADDR) { |
973163fc CY |
681 | if (flag == F2FS_GET_BLOCK_BMAP) |
682 | err = -ENOENT; | |
4fe71e88 | 683 | goto sync_out; |
973163fc | 684 | } |
e2b4e2bc | 685 | } |
e2b4e2bc | 686 | } |
eb47b800 | 687 | |
4fe71e88 CY |
688 | if (map->m_len == 0) { |
689 | /* preallocated unwritten block should be mapped for fiemap. */ | |
690 | if (blkaddr == NEW_ADDR) | |
691 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
692 | map->m_flags |= F2FS_MAP_MAPPED; | |
693 | ||
694 | map->m_pblk = blkaddr; | |
695 | map->m_len = 1; | |
696 | } else if ((map->m_pblk != NEW_ADDR && | |
697 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 698 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
24b84912 JK |
699 | flag == F2FS_GET_BLOCK_PRE_DIO || |
700 | flag == F2FS_GET_BLOCK_PRE_AIO) { | |
4fe71e88 CY |
701 | ofs++; |
702 | map->m_len++; | |
703 | } else { | |
704 | goto sync_out; | |
705 | } | |
bfad7c2d | 706 | |
bfad7c2d JK |
707 | dn.ofs_in_node++; |
708 | pgofs++; | |
709 | ||
4fe71e88 CY |
710 | if (map->m_len < maxblocks) { |
711 | if (dn.ofs_in_node < end_offset) | |
712 | goto next_block; | |
7df3a431 | 713 | |
bfad7c2d JK |
714 | if (allocated) |
715 | sync_inode_page(&dn); | |
bfad7c2d JK |
716 | f2fs_put_dnode(&dn); |
717 | ||
3104af35 CY |
718 | if (create) { |
719 | f2fs_unlock_op(sbi); | |
3c082b7b | 720 | f2fs_balance_fs(sbi, allocated); |
3104af35 | 721 | } |
3c082b7b | 722 | allocated = false; |
4fe71e88 | 723 | goto next_dnode; |
eb47b800 | 724 | } |
7df3a431 | 725 | |
bfad7c2d JK |
726 | sync_out: |
727 | if (allocated) | |
728 | sync_inode_page(&dn); | |
eb47b800 | 729 | f2fs_put_dnode(&dn); |
bfad7c2d | 730 | unlock_out: |
2a340760 | 731 | if (create) { |
3104af35 | 732 | f2fs_unlock_op(sbi); |
3c082b7b | 733 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 734 | } |
bfad7c2d | 735 | out: |
003a3e1d | 736 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 737 | return err; |
eb47b800 JK |
738 | } |
739 | ||
003a3e1d | 740 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
741 | struct buffer_head *bh, int create, int flag, |
742 | pgoff_t *next_pgofs) | |
003a3e1d JK |
743 | { |
744 | struct f2fs_map_blocks map; | |
745 | int ret; | |
746 | ||
747 | map.m_lblk = iblock; | |
748 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 749 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 750 | |
e2b4e2bc | 751 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
752 | if (!ret) { |
753 | map_bh(bh, inode->i_sb, map.m_pblk); | |
754 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
755 | bh->b_size = map.m_len << inode->i_blkbits; | |
756 | } | |
757 | return ret; | |
758 | } | |
759 | ||
ccfb3000 | 760 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
761 | struct buffer_head *bh_result, int create, int flag, |
762 | pgoff_t *next_pgofs) | |
e2b4e2bc | 763 | { |
da85985c CY |
764 | return __get_data_block(inode, iblock, bh_result, create, |
765 | flag, next_pgofs); | |
e2b4e2bc CY |
766 | } |
767 | ||
768 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
769 | struct buffer_head *bh_result, int create) |
770 | { | |
e2b4e2bc | 771 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 772 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
773 | } |
774 | ||
e2b4e2bc | 775 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
776 | struct buffer_head *bh_result, int create) |
777 | { | |
179448bf | 778 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 779 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
780 | return -EFBIG; |
781 | ||
e2b4e2bc | 782 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 783 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
784 | } |
785 | ||
7f63eb77 JK |
786 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
787 | { | |
788 | return (offset >> inode->i_blkbits); | |
789 | } | |
790 | ||
791 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
792 | { | |
793 | return (blk << inode->i_blkbits); | |
794 | } | |
795 | ||
9ab70134 JK |
796 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
797 | u64 start, u64 len) | |
798 | { | |
7f63eb77 JK |
799 | struct buffer_head map_bh; |
800 | sector_t start_blk, last_blk; | |
da85985c | 801 | pgoff_t next_pgofs; |
de1475cc | 802 | loff_t isize; |
7f63eb77 JK |
803 | u64 logical = 0, phys = 0, size = 0; |
804 | u32 flags = 0; | |
7f63eb77 JK |
805 | int ret = 0; |
806 | ||
807 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
808 | if (ret) | |
809 | return ret; | |
810 | ||
67f8cf3c JK |
811 | if (f2fs_has_inline_data(inode)) { |
812 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
813 | if (ret != -EAGAIN) | |
814 | return ret; | |
815 | } | |
816 | ||
5955102c | 817 | inode_lock(inode); |
de1475cc FL |
818 | |
819 | isize = i_size_read(inode); | |
9a950d52 FL |
820 | if (start >= isize) |
821 | goto out; | |
7f63eb77 | 822 | |
9a950d52 FL |
823 | if (start + len > isize) |
824 | len = isize - start; | |
7f63eb77 JK |
825 | |
826 | if (logical_to_blk(inode, len) == 0) | |
827 | len = blk_to_logical(inode, 1); | |
828 | ||
829 | start_blk = logical_to_blk(inode, start); | |
830 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 831 | |
7f63eb77 JK |
832 | next: |
833 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
834 | map_bh.b_size = len; | |
835 | ||
e2b4e2bc | 836 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 837 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
838 | if (ret) |
839 | goto out; | |
840 | ||
841 | /* HOLE */ | |
842 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 843 | start_blk = next_pgofs; |
9a950d52 | 844 | /* Go through holes util pass the EOF */ |
da85985c | 845 | if (blk_to_logical(inode, start_blk) < isize) |
9a950d52 FL |
846 | goto prep_next; |
847 | /* Found a hole beyond isize means no more extents. | |
848 | * Note that the premise is that filesystems don't | |
849 | * punch holes beyond isize and keep size unchanged. | |
850 | */ | |
851 | flags |= FIEMAP_EXTENT_LAST; | |
852 | } | |
7f63eb77 | 853 | |
da5af127 CY |
854 | if (size) { |
855 | if (f2fs_encrypted_inode(inode)) | |
856 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
857 | ||
9a950d52 FL |
858 | ret = fiemap_fill_next_extent(fieinfo, logical, |
859 | phys, size, flags); | |
da5af127 | 860 | } |
7f63eb77 | 861 | |
9a950d52 FL |
862 | if (start_blk > last_blk || ret) |
863 | goto out; | |
7f63eb77 | 864 | |
9a950d52 FL |
865 | logical = blk_to_logical(inode, start_blk); |
866 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
867 | size = map_bh.b_size; | |
868 | flags = 0; | |
869 | if (buffer_unwritten(&map_bh)) | |
870 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 871 | |
9a950d52 | 872 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 873 | |
9a950d52 | 874 | prep_next: |
7f63eb77 JK |
875 | cond_resched(); |
876 | if (fatal_signal_pending(current)) | |
877 | ret = -EINTR; | |
878 | else | |
879 | goto next; | |
880 | out: | |
881 | if (ret == 1) | |
882 | ret = 0; | |
883 | ||
5955102c | 884 | inode_unlock(inode); |
7f63eb77 | 885 | return ret; |
9ab70134 JK |
886 | } |
887 | ||
f1e88660 JK |
888 | /* |
889 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
890 | * Major change was from block_size == page_size in f2fs by default. | |
891 | */ | |
892 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
893 | struct list_head *pages, struct page *page, | |
894 | unsigned nr_pages) | |
895 | { | |
896 | struct bio *bio = NULL; | |
897 | unsigned page_idx; | |
898 | sector_t last_block_in_bio = 0; | |
899 | struct inode *inode = mapping->host; | |
900 | const unsigned blkbits = inode->i_blkbits; | |
901 | const unsigned blocksize = 1 << blkbits; | |
902 | sector_t block_in_file; | |
903 | sector_t last_block; | |
904 | sector_t last_block_in_file; | |
905 | sector_t block_nr; | |
906 | struct block_device *bdev = inode->i_sb->s_bdev; | |
907 | struct f2fs_map_blocks map; | |
908 | ||
909 | map.m_pblk = 0; | |
910 | map.m_lblk = 0; | |
911 | map.m_len = 0; | |
912 | map.m_flags = 0; | |
da85985c | 913 | map.m_next_pgofs = NULL; |
f1e88660 JK |
914 | |
915 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
916 | ||
917 | prefetchw(&page->flags); | |
918 | if (pages) { | |
919 | page = list_entry(pages->prev, struct page, lru); | |
920 | list_del(&page->lru); | |
921 | if (add_to_page_cache_lru(page, mapping, | |
922 | page->index, GFP_KERNEL)) | |
923 | goto next_page; | |
924 | } | |
925 | ||
926 | block_in_file = (sector_t)page->index; | |
927 | last_block = block_in_file + nr_pages; | |
928 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
929 | blkbits; | |
930 | if (last_block > last_block_in_file) | |
931 | last_block = last_block_in_file; | |
932 | ||
933 | /* | |
934 | * Map blocks using the previous result first. | |
935 | */ | |
936 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
937 | block_in_file > map.m_lblk && | |
938 | block_in_file < (map.m_lblk + map.m_len)) | |
939 | goto got_it; | |
940 | ||
941 | /* | |
942 | * Then do more f2fs_map_blocks() calls until we are | |
943 | * done with this page. | |
944 | */ | |
945 | map.m_flags = 0; | |
946 | ||
947 | if (block_in_file < last_block) { | |
948 | map.m_lblk = block_in_file; | |
949 | map.m_len = last_block - block_in_file; | |
950 | ||
46c9e141 | 951 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 952 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
953 | goto set_error_page; |
954 | } | |
955 | got_it: | |
956 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
957 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
958 | SetPageMappedToDisk(page); | |
959 | ||
960 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
961 | SetPageUptodate(page); | |
962 | goto confused; | |
963 | } | |
964 | } else { | |
965 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
966 | SetPageUptodate(page); | |
967 | unlock_page(page); | |
968 | goto next_page; | |
969 | } | |
970 | ||
971 | /* | |
972 | * This page will go to BIO. Do we need to send this | |
973 | * BIO off first? | |
974 | */ | |
975 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
976 | submit_and_realloc: | |
977 | submit_bio(READ, bio); | |
978 | bio = NULL; | |
979 | } | |
980 | if (bio == NULL) { | |
4375a336 JK |
981 | struct f2fs_crypto_ctx *ctx = NULL; |
982 | ||
983 | if (f2fs_encrypted_inode(inode) && | |
984 | S_ISREG(inode->i_mode)) { | |
4375a336 JK |
985 | |
986 | ctx = f2fs_get_crypto_ctx(inode); | |
987 | if (IS_ERR(ctx)) | |
988 | goto set_error_page; | |
989 | ||
990 | /* wait the page to be moved by cleaning */ | |
08b39fbd CY |
991 | f2fs_wait_on_encrypted_page_writeback( |
992 | F2FS_I_SB(inode), block_nr); | |
4375a336 JK |
993 | } |
994 | ||
f1e88660 | 995 | bio = bio_alloc(GFP_KERNEL, |
b54ffb73 | 996 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
4375a336 JK |
997 | if (!bio) { |
998 | if (ctx) | |
999 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 1000 | goto set_error_page; |
4375a336 | 1001 | } |
f1e88660 JK |
1002 | bio->bi_bdev = bdev; |
1003 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 1004 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 1005 | bio->bi_private = ctx; |
f1e88660 JK |
1006 | } |
1007 | ||
1008 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1009 | goto submit_and_realloc; | |
1010 | ||
1011 | last_block_in_bio = block_nr; | |
1012 | goto next_page; | |
1013 | set_error_page: | |
1014 | SetPageError(page); | |
1015 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
1016 | unlock_page(page); | |
1017 | goto next_page; | |
1018 | confused: | |
1019 | if (bio) { | |
1020 | submit_bio(READ, bio); | |
1021 | bio = NULL; | |
1022 | } | |
1023 | unlock_page(page); | |
1024 | next_page: | |
1025 | if (pages) | |
1026 | page_cache_release(page); | |
1027 | } | |
1028 | BUG_ON(pages && !list_empty(pages)); | |
1029 | if (bio) | |
1030 | submit_bio(READ, bio); | |
1031 | return 0; | |
1032 | } | |
1033 | ||
eb47b800 JK |
1034 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1035 | { | |
9ffe0fb5 | 1036 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1037 | int ret = -EAGAIN; |
9ffe0fb5 | 1038 | |
c20e89cd CY |
1039 | trace_f2fs_readpage(page, DATA); |
1040 | ||
e1c42045 | 1041 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1042 | if (f2fs_has_inline_data(inode)) |
1043 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1044 | if (ret == -EAGAIN) |
f1e88660 | 1045 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1046 | return ret; |
eb47b800 JK |
1047 | } |
1048 | ||
1049 | static int f2fs_read_data_pages(struct file *file, | |
1050 | struct address_space *mapping, | |
1051 | struct list_head *pages, unsigned nr_pages) | |
1052 | { | |
9ffe0fb5 | 1053 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1054 | struct page *page = list_entry(pages->prev, struct page, lru); |
1055 | ||
1056 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1057 | |
1058 | /* If the file has inline data, skip readpages */ | |
1059 | if (f2fs_has_inline_data(inode)) | |
1060 | return 0; | |
1061 | ||
f1e88660 | 1062 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1063 | } |
1064 | ||
05ca3632 | 1065 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1066 | { |
05ca3632 | 1067 | struct page *page = fio->page; |
eb47b800 | 1068 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1069 | struct dnode_of_data dn; |
1070 | int err = 0; | |
1071 | ||
1072 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1073 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1074 | if (err) |
1075 | return err; | |
1076 | ||
28bc106b | 1077 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1078 | |
1079 | /* This page is already truncated */ | |
7a9d7548 | 1080 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1081 | ClearPageUptodate(page); |
eb47b800 | 1082 | goto out_writepage; |
2bca1e23 | 1083 | } |
eb47b800 | 1084 | |
4375a336 | 1085 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
08b39fbd CY |
1086 | |
1087 | /* wait for GCed encrypted page writeback */ | |
1088 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1089 | fio->old_blkaddr); |
08b39fbd | 1090 | |
4375a336 JK |
1091 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); |
1092 | if (IS_ERR(fio->encrypted_page)) { | |
1093 | err = PTR_ERR(fio->encrypted_page); | |
1094 | goto out_writepage; | |
1095 | } | |
1096 | } | |
1097 | ||
eb47b800 JK |
1098 | set_page_writeback(page); |
1099 | ||
1100 | /* | |
1101 | * If current allocation needs SSR, | |
1102 | * it had better in-place writes for updated data. | |
1103 | */ | |
7a9d7548 | 1104 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1105 | !is_cold_data(page) && |
2da3e027 | 1106 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1107 | need_inplace_update(inode))) { |
05ca3632 | 1108 | rewrite_data_page(fio); |
fff04f90 | 1109 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1110 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1111 | } else { |
05ca3632 | 1112 | write_data_page(&dn, fio); |
216a620a | 1113 | set_data_blkaddr(&dn); |
7e4dde79 | 1114 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1115 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1116 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1117 | if (page->index == 0) |
1118 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1119 | } |
1120 | out_writepage: | |
1121 | f2fs_put_dnode(&dn); | |
1122 | return err; | |
1123 | } | |
1124 | ||
1125 | static int f2fs_write_data_page(struct page *page, | |
1126 | struct writeback_control *wbc) | |
1127 | { | |
1128 | struct inode *inode = page->mapping->host; | |
4081363f | 1129 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1130 | loff_t i_size = i_size_read(inode); |
1131 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1132 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1133 | unsigned offset = 0; |
39936837 | 1134 | bool need_balance_fs = false; |
eb47b800 | 1135 | int err = 0; |
458e6197 | 1136 | struct f2fs_io_info fio = { |
05ca3632 | 1137 | .sbi = sbi, |
458e6197 | 1138 | .type = DATA, |
6c311ec6 | 1139 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1140 | .page = page, |
4375a336 | 1141 | .encrypted_page = NULL, |
458e6197 | 1142 | }; |
eb47b800 | 1143 | |
ecda0de3 CY |
1144 | trace_f2fs_writepage(page, DATA); |
1145 | ||
eb47b800 | 1146 | if (page->index < end_index) |
39936837 | 1147 | goto write; |
eb47b800 JK |
1148 | |
1149 | /* | |
1150 | * If the offset is out-of-range of file size, | |
1151 | * this page does not have to be written to disk. | |
1152 | */ | |
1153 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1154 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1155 | goto out; |
eb47b800 JK |
1156 | |
1157 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1158 | write: |
caf0047e | 1159 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1160 | goto redirty_out; |
1e84371f JK |
1161 | if (f2fs_is_drop_cache(inode)) |
1162 | goto out; | |
1163 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1164 | available_free_memory(sbi, BASE_CHECK)) | |
1165 | goto redirty_out; | |
eb47b800 | 1166 | |
39936837 | 1167 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1168 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1169 | if (unlikely(f2fs_cp_error(sbi))) |
1170 | goto redirty_out; | |
05ca3632 | 1171 | err = do_write_data_page(&fio); |
8618b881 JK |
1172 | goto done; |
1173 | } | |
9ffe0fb5 | 1174 | |
cf779cab JK |
1175 | /* we should bypass data pages to proceed the kworkder jobs */ |
1176 | if (unlikely(f2fs_cp_error(sbi))) { | |
1177 | SetPageError(page); | |
a7ffdbe2 | 1178 | goto out; |
cf779cab JK |
1179 | } |
1180 | ||
8618b881 | 1181 | if (!wbc->for_reclaim) |
39936837 | 1182 | need_balance_fs = true; |
8618b881 | 1183 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1184 | goto redirty_out; |
eb47b800 | 1185 | |
b3d208f9 | 1186 | err = -EAGAIN; |
8618b881 | 1187 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1188 | if (f2fs_has_inline_data(inode)) |
1189 | err = f2fs_write_inline_data(inode, page); | |
1190 | if (err == -EAGAIN) | |
05ca3632 | 1191 | err = do_write_data_page(&fio); |
8618b881 JK |
1192 | f2fs_unlock_op(sbi); |
1193 | done: | |
1194 | if (err && err != -ENOENT) | |
1195 | goto redirty_out; | |
eb47b800 | 1196 | |
eb47b800 | 1197 | clear_cold_data(page); |
39936837 | 1198 | out: |
a7ffdbe2 | 1199 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1200 | if (err) |
1201 | ClearPageUptodate(page); | |
0c3a5797 CY |
1202 | |
1203 | if (wbc->for_reclaim) { | |
1204 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1205 | remove_dirty_inode(inode); | |
1206 | } | |
1207 | ||
eb47b800 | 1208 | unlock_page(page); |
2c4db1a6 | 1209 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1210 | |
1211 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1212 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1213 | |
eb47b800 JK |
1214 | return 0; |
1215 | ||
eb47b800 | 1216 | redirty_out: |
76f60268 | 1217 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1218 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1219 | } |
1220 | ||
fa9150a8 NJ |
1221 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1222 | void *data) | |
1223 | { | |
1224 | struct address_space *mapping = data; | |
1225 | int ret = mapping->a_ops->writepage(page, wbc); | |
1226 | mapping_set_error(mapping, ret); | |
1227 | return ret; | |
1228 | } | |
1229 | ||
8f46dcae CY |
1230 | /* |
1231 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1232 | * The major change is making write step of cold data page separately from | |
1233 | * warm/hot data page. | |
1234 | */ | |
1235 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1236 | struct writeback_control *wbc, writepage_t writepage, | |
1237 | void *data) | |
1238 | { | |
1239 | int ret = 0; | |
1240 | int done = 0; | |
1241 | struct pagevec pvec; | |
1242 | int nr_pages; | |
1243 | pgoff_t uninitialized_var(writeback_index); | |
1244 | pgoff_t index; | |
1245 | pgoff_t end; /* Inclusive */ | |
1246 | pgoff_t done_index; | |
1247 | int cycled; | |
1248 | int range_whole = 0; | |
1249 | int tag; | |
1250 | int step = 0; | |
1251 | ||
1252 | pagevec_init(&pvec, 0); | |
1253 | next: | |
1254 | if (wbc->range_cyclic) { | |
1255 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1256 | index = writeback_index; | |
1257 | if (index == 0) | |
1258 | cycled = 1; | |
1259 | else | |
1260 | cycled = 0; | |
1261 | end = -1; | |
1262 | } else { | |
1263 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1264 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1265 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1266 | range_whole = 1; | |
1267 | cycled = 1; /* ignore range_cyclic tests */ | |
1268 | } | |
1269 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1270 | tag = PAGECACHE_TAG_TOWRITE; | |
1271 | else | |
1272 | tag = PAGECACHE_TAG_DIRTY; | |
1273 | retry: | |
1274 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1275 | tag_pages_for_writeback(mapping, index, end); | |
1276 | done_index = index; | |
1277 | while (!done && (index <= end)) { | |
1278 | int i; | |
1279 | ||
1280 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1281 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1282 | if (nr_pages == 0) | |
1283 | break; | |
1284 | ||
1285 | for (i = 0; i < nr_pages; i++) { | |
1286 | struct page *page = pvec.pages[i]; | |
1287 | ||
1288 | if (page->index > end) { | |
1289 | done = 1; | |
1290 | break; | |
1291 | } | |
1292 | ||
1293 | done_index = page->index; | |
1294 | ||
1295 | lock_page(page); | |
1296 | ||
1297 | if (unlikely(page->mapping != mapping)) { | |
1298 | continue_unlock: | |
1299 | unlock_page(page); | |
1300 | continue; | |
1301 | } | |
1302 | ||
1303 | if (!PageDirty(page)) { | |
1304 | /* someone wrote it for us */ | |
1305 | goto continue_unlock; | |
1306 | } | |
1307 | ||
737f1899 | 1308 | if (step == is_cold_data(page)) |
8f46dcae CY |
1309 | goto continue_unlock; |
1310 | ||
1311 | if (PageWriteback(page)) { | |
1312 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1313 | f2fs_wait_on_page_writeback(page, |
1314 | DATA, true); | |
8f46dcae CY |
1315 | else |
1316 | goto continue_unlock; | |
1317 | } | |
1318 | ||
1319 | BUG_ON(PageWriteback(page)); | |
1320 | if (!clear_page_dirty_for_io(page)) | |
1321 | goto continue_unlock; | |
1322 | ||
1323 | ret = (*writepage)(page, wbc, data); | |
1324 | if (unlikely(ret)) { | |
1325 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1326 | unlock_page(page); | |
1327 | ret = 0; | |
1328 | } else { | |
1329 | done_index = page->index + 1; | |
1330 | done = 1; | |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | ||
1335 | if (--wbc->nr_to_write <= 0 && | |
1336 | wbc->sync_mode == WB_SYNC_NONE) { | |
1337 | done = 1; | |
1338 | break; | |
1339 | } | |
1340 | } | |
1341 | pagevec_release(&pvec); | |
1342 | cond_resched(); | |
1343 | } | |
1344 | ||
1345 | if (step < 1) { | |
1346 | step++; | |
1347 | goto next; | |
1348 | } | |
1349 | ||
1350 | if (!cycled && !done) { | |
1351 | cycled = 1; | |
1352 | index = 0; | |
1353 | end = writeback_index - 1; | |
1354 | goto retry; | |
1355 | } | |
1356 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1357 | mapping->writeback_index = done_index; | |
1358 | ||
1359 | return ret; | |
1360 | } | |
1361 | ||
25ca923b | 1362 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1363 | struct writeback_control *wbc) |
1364 | { | |
1365 | struct inode *inode = mapping->host; | |
4081363f | 1366 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1367 | bool locked = false; |
eb47b800 | 1368 | int ret; |
50c8cdb3 | 1369 | long diff; |
eb47b800 | 1370 | |
cfb185a1 | 1371 | /* deal with chardevs and other special file */ |
1372 | if (!mapping->a_ops->writepage) | |
1373 | return 0; | |
1374 | ||
6a290544 CY |
1375 | /* skip writing if there is no dirty page in this inode */ |
1376 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1377 | return 0; | |
1378 | ||
a1257023 JK |
1379 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1380 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1381 | available_free_memory(sbi, DIRTY_DENTS)) | |
1382 | goto skip_write; | |
1383 | ||
d323d005 CY |
1384 | /* skip writing during file defragment */ |
1385 | if (is_inode_flag_set(F2FS_I(inode), FI_DO_DEFRAG)) | |
1386 | goto skip_write; | |
1387 | ||
d5669f7b JK |
1388 | /* during POR, we don't need to trigger writepage at all. */ |
1389 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1390 | goto skip_write; | |
1391 | ||
d31c7c3f YH |
1392 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1393 | ||
50c8cdb3 | 1394 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1395 | |
25c13551 | 1396 | if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) { |
5463e7c1 JK |
1397 | mutex_lock(&sbi->writepages); |
1398 | locked = true; | |
1399 | } | |
8f46dcae | 1400 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
0c3a5797 | 1401 | f2fs_submit_merged_bio_cond(sbi, inode, NULL, 0, DATA, WRITE); |
5463e7c1 JK |
1402 | if (locked) |
1403 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1404 | |
c227f912 | 1405 | remove_dirty_inode(inode); |
eb47b800 | 1406 | |
50c8cdb3 | 1407 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1408 | return ret; |
d3baf95d JK |
1409 | |
1410 | skip_write: | |
a7ffdbe2 | 1411 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1412 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1413 | return 0; |
eb47b800 JK |
1414 | } |
1415 | ||
3aab8f82 CY |
1416 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1417 | { | |
1418 | struct inode *inode = mapping->host; | |
819d9153 | 1419 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1420 | |
819d9153 JK |
1421 | if (to > i_size) { |
1422 | truncate_pagecache(inode, i_size); | |
1423 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1424 | } |
1425 | } | |
1426 | ||
2aadac08 JK |
1427 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1428 | struct page *page, loff_t pos, unsigned len, | |
1429 | block_t *blk_addr, bool *node_changed) | |
1430 | { | |
1431 | struct inode *inode = page->mapping->host; | |
1432 | pgoff_t index = page->index; | |
1433 | struct dnode_of_data dn; | |
1434 | struct page *ipage; | |
b4d07a3e JK |
1435 | bool locked = false; |
1436 | struct extent_info ei; | |
2aadac08 JK |
1437 | int err = 0; |
1438 | ||
24b84912 JK |
1439 | /* |
1440 | * we already allocated all the blocks, so we don't need to get | |
1441 | * the block addresses when there is no need to fill the page. | |
1442 | */ | |
1443 | if (!f2fs_has_inline_data(inode) && !f2fs_encrypted_inode(inode) && | |
1444 | len == PAGE_CACHE_SIZE) | |
1445 | return 0; | |
1446 | ||
b4d07a3e JK |
1447 | if (f2fs_has_inline_data(inode) || |
1448 | (pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1449 | f2fs_lock_op(sbi); | |
1450 | locked = true; | |
1451 | } | |
1452 | restart: | |
2aadac08 JK |
1453 | /* check inline_data */ |
1454 | ipage = get_node_page(sbi, inode->i_ino); | |
1455 | if (IS_ERR(ipage)) { | |
1456 | err = PTR_ERR(ipage); | |
1457 | goto unlock_out; | |
1458 | } | |
1459 | ||
1460 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1461 | ||
1462 | if (f2fs_has_inline_data(inode)) { | |
1463 | if (pos + len <= MAX_INLINE_DATA) { | |
1464 | read_inline_data(page, ipage); | |
1465 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
2049d4fc | 1466 | set_inline_node(ipage); |
2aadac08 JK |
1467 | } else { |
1468 | err = f2fs_convert_inline_page(&dn, page); | |
1469 | if (err) | |
b4d07a3e JK |
1470 | goto out; |
1471 | if (dn.data_blkaddr == NULL_ADDR) | |
1472 | err = f2fs_get_block(&dn, index); | |
1473 | } | |
1474 | } else if (locked) { | |
1475 | err = f2fs_get_block(&dn, index); | |
1476 | } else { | |
1477 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1478 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1479 | } else { | |
b4d07a3e JK |
1480 | /* hole case */ |
1481 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
b483fadf | 1482 | if (err || (!err && dn.data_blkaddr == NULL_ADDR)) { |
b4d07a3e JK |
1483 | f2fs_put_dnode(&dn); |
1484 | f2fs_lock_op(sbi); | |
1485 | locked = true; | |
1486 | goto restart; | |
1487 | } | |
2aadac08 JK |
1488 | } |
1489 | } | |
b4d07a3e | 1490 | |
2aadac08 JK |
1491 | /* convert_inline_page can make node_changed */ |
1492 | *blk_addr = dn.data_blkaddr; | |
1493 | *node_changed = dn.node_changed; | |
b4d07a3e | 1494 | out: |
2aadac08 JK |
1495 | f2fs_put_dnode(&dn); |
1496 | unlock_out: | |
b4d07a3e JK |
1497 | if (locked) |
1498 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1499 | return err; |
1500 | } | |
1501 | ||
eb47b800 JK |
1502 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1503 | loff_t pos, unsigned len, unsigned flags, | |
1504 | struct page **pagep, void **fsdata) | |
1505 | { | |
1506 | struct inode *inode = mapping->host; | |
4081363f | 1507 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1508 | struct page *page = NULL; |
eb47b800 | 1509 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
2aadac08 JK |
1510 | bool need_balance = false; |
1511 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1512 | int err = 0; |
1513 | ||
62aed044 CY |
1514 | trace_f2fs_write_begin(inode, pos, len, flags); |
1515 | ||
5f727395 JK |
1516 | /* |
1517 | * We should check this at this moment to avoid deadlock on inode page | |
1518 | * and #0 page. The locking rule for inline_data conversion should be: | |
1519 | * lock_page(page #0) -> lock_page(inode_page) | |
1520 | */ | |
1521 | if (index != 0) { | |
1522 | err = f2fs_convert_inline_inode(inode); | |
1523 | if (err) | |
1524 | goto fail; | |
1525 | } | |
afcb7ca0 | 1526 | repeat: |
eb47b800 | 1527 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1528 | if (!page) { |
1529 | err = -ENOMEM; | |
1530 | goto fail; | |
1531 | } | |
d5f66990 | 1532 | |
eb47b800 JK |
1533 | *pagep = page; |
1534 | ||
2aadac08 JK |
1535 | err = prepare_write_begin(sbi, page, pos, len, |
1536 | &blkaddr, &need_balance); | |
9ba69cf9 | 1537 | if (err) |
2aadac08 | 1538 | goto fail; |
9ba69cf9 | 1539 | |
2aadac08 | 1540 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 | 1541 | unlock_page(page); |
2c4db1a6 | 1542 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1543 | lock_page(page); |
1544 | if (page->mapping != mapping) { | |
1545 | /* The page got truncated from under us */ | |
1546 | f2fs_put_page(page, 1); | |
1547 | goto repeat; | |
1548 | } | |
1549 | } | |
1550 | ||
fec1d657 | 1551 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1552 | |
08b39fbd CY |
1553 | /* wait for GCed encrypted page writeback */ |
1554 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1555 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1556 | |
90d4388a CY |
1557 | if (len == PAGE_CACHE_SIZE) |
1558 | goto out_update; | |
1559 | if (PageUptodate(page)) | |
1560 | goto out_clear; | |
eb47b800 JK |
1561 | |
1562 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1563 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1564 | unsigned end = start + len; | |
1565 | ||
1566 | /* Reading beyond i_size is simple: memset to zero */ | |
1567 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
90d4388a | 1568 | goto out_update; |
eb47b800 JK |
1569 | } |
1570 | ||
2aadac08 | 1571 | if (blkaddr == NEW_ADDR) { |
eb47b800 JK |
1572 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1573 | } else { | |
cf04e8eb | 1574 | struct f2fs_io_info fio = { |
05ca3632 | 1575 | .sbi = sbi, |
cf04e8eb JK |
1576 | .type = DATA, |
1577 | .rw = READ_SYNC, | |
7a9d7548 CY |
1578 | .old_blkaddr = blkaddr, |
1579 | .new_blkaddr = blkaddr, | |
05ca3632 | 1580 | .page = page, |
4375a336 | 1581 | .encrypted_page = NULL, |
cf04e8eb | 1582 | }; |
05ca3632 | 1583 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1584 | if (err) |
1585 | goto fail; | |
d54c795b | 1586 | |
393ff91f | 1587 | lock_page(page); |
6bacf52f | 1588 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1589 | err = -EIO; |
1590 | goto fail; | |
eb47b800 | 1591 | } |
6bacf52f | 1592 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1593 | f2fs_put_page(page, 1); |
1594 | goto repeat; | |
eb47b800 | 1595 | } |
4375a336 JK |
1596 | |
1597 | /* avoid symlink page */ | |
1598 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
ce855a3b | 1599 | err = f2fs_decrypt(page); |
86531d6b | 1600 | if (err) |
4375a336 | 1601 | goto fail; |
4375a336 | 1602 | } |
eb47b800 | 1603 | } |
90d4388a | 1604 | out_update: |
eb47b800 | 1605 | SetPageUptodate(page); |
90d4388a | 1606 | out_clear: |
eb47b800 JK |
1607 | clear_cold_data(page); |
1608 | return 0; | |
9ba69cf9 | 1609 | |
3aab8f82 | 1610 | fail: |
86531d6b | 1611 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1612 | f2fs_write_failed(mapping, pos + len); |
1613 | return err; | |
eb47b800 JK |
1614 | } |
1615 | ||
a1dd3c13 JK |
1616 | static int f2fs_write_end(struct file *file, |
1617 | struct address_space *mapping, | |
1618 | loff_t pos, unsigned len, unsigned copied, | |
1619 | struct page *page, void *fsdata) | |
1620 | { | |
1621 | struct inode *inode = page->mapping->host; | |
1622 | ||
dfb2bf38 CY |
1623 | trace_f2fs_write_end(inode, pos, len, copied); |
1624 | ||
34ba94ba | 1625 | set_page_dirty(page); |
a1dd3c13 JK |
1626 | |
1627 | if (pos + copied > i_size_read(inode)) { | |
1628 | i_size_write(inode, pos + copied); | |
1629 | mark_inode_dirty(inode); | |
a1dd3c13 JK |
1630 | } |
1631 | ||
75c3c8bc | 1632 | f2fs_put_page(page, 1); |
d0239e1b | 1633 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1634 | return copied; |
1635 | } | |
1636 | ||
6f673763 OS |
1637 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1638 | loff_t offset) | |
944fcfc1 JK |
1639 | { |
1640 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1641 | |
944fcfc1 JK |
1642 | if (offset & blocksize_mask) |
1643 | return -EINVAL; | |
1644 | ||
5b46f25d AV |
1645 | if (iov_iter_alignment(iter) & blocksize_mask) |
1646 | return -EINVAL; | |
1647 | ||
944fcfc1 JK |
1648 | return 0; |
1649 | } | |
1650 | ||
22c6186e OS |
1651 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1652 | loff_t offset) | |
eb47b800 | 1653 | { |
b439b103 | 1654 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1655 | struct inode *inode = mapping->host; |
1656 | size_t count = iov_iter_count(iter); | |
1657 | int err; | |
944fcfc1 | 1658 | |
b439b103 | 1659 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1660 | if (err) |
1661 | return err; | |
9ffe0fb5 | 1662 | |
fcc85a4d JK |
1663 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1664 | return 0; | |
1665 | ||
6f673763 | 1666 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1667 | |
e2b4e2bc | 1668 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
6f673763 | 1669 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1670 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1671 | |
6f673763 | 1672 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1673 | |
3aab8f82 | 1674 | return err; |
eb47b800 JK |
1675 | } |
1676 | ||
487261f3 CY |
1677 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1678 | unsigned int length) | |
eb47b800 JK |
1679 | { |
1680 | struct inode *inode = page->mapping->host; | |
487261f3 | 1681 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1682 | |
487261f3 CY |
1683 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1684 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1685 | return; |
1686 | ||
487261f3 CY |
1687 | if (PageDirty(page)) { |
1688 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1689 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1690 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1691 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1692 | else | |
1693 | inode_dec_dirty_pages(inode); | |
1694 | } | |
decd36b6 CY |
1695 | |
1696 | /* This is atomic written page, keep Private */ | |
1697 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1698 | return; | |
1699 | ||
eb47b800 JK |
1700 | ClearPagePrivate(page); |
1701 | } | |
1702 | ||
487261f3 | 1703 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1704 | { |
f68daeeb JK |
1705 | /* If this is dirty page, keep PagePrivate */ |
1706 | if (PageDirty(page)) | |
1707 | return 0; | |
1708 | ||
decd36b6 CY |
1709 | /* This is atomic written page, keep Private */ |
1710 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1711 | return 0; | |
1712 | ||
eb47b800 | 1713 | ClearPagePrivate(page); |
c3850aa1 | 1714 | return 1; |
eb47b800 JK |
1715 | } |
1716 | ||
1717 | static int f2fs_set_data_page_dirty(struct page *page) | |
1718 | { | |
1719 | struct address_space *mapping = page->mapping; | |
1720 | struct inode *inode = mapping->host; | |
1721 | ||
26c6b887 JK |
1722 | trace_f2fs_set_page_dirty(page, DATA); |
1723 | ||
eb47b800 | 1724 | SetPageUptodate(page); |
34ba94ba | 1725 | |
1e84371f | 1726 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1727 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1728 | register_inmem_page(inode, page); | |
1729 | return 1; | |
1730 | } | |
1731 | /* | |
1732 | * Previously, this page has been registered, we just | |
1733 | * return here. | |
1734 | */ | |
1735 | return 0; | |
34ba94ba JK |
1736 | } |
1737 | ||
eb47b800 JK |
1738 | if (!PageDirty(page)) { |
1739 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1740 | update_dirty_page(inode, page); |
eb47b800 JK |
1741 | return 1; |
1742 | } | |
1743 | return 0; | |
1744 | } | |
1745 | ||
c01e54b7 JK |
1746 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1747 | { | |
454ae7e5 CY |
1748 | struct inode *inode = mapping->host; |
1749 | ||
1d373a0e JK |
1750 | if (f2fs_has_inline_data(inode)) |
1751 | return 0; | |
1752 | ||
1753 | /* make sure allocating whole blocks */ | |
1754 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1755 | filemap_write_and_wait(mapping); | |
1756 | ||
e2b4e2bc | 1757 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1758 | } |
1759 | ||
eb47b800 JK |
1760 | const struct address_space_operations f2fs_dblock_aops = { |
1761 | .readpage = f2fs_read_data_page, | |
1762 | .readpages = f2fs_read_data_pages, | |
1763 | .writepage = f2fs_write_data_page, | |
1764 | .writepages = f2fs_write_data_pages, | |
1765 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1766 | .write_end = f2fs_write_end, |
eb47b800 | 1767 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1768 | .invalidatepage = f2fs_invalidate_page, |
1769 | .releasepage = f2fs_release_page, | |
eb47b800 | 1770 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1771 | .bmap = f2fs_bmap, |
eb47b800 | 1772 | }; |