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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 */ | |
05ca3632 | 222 | bio = __bio_alloc(fio->sbi, fio->blk_addr, 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 | |
cf04e8eb | 243 | verify_block_addr(sbi, fio->blk_addr); |
93dfe2ac | 244 | |
df0f8dc0 | 245 | down_write(&io->io_rwsem); |
93dfe2ac | 246 | |
940a6d34 | 247 | if (!is_read) |
93dfe2ac JK |
248 | inc_page_count(sbi, F2FS_WRITEBACK); |
249 | ||
cf04e8eb | 250 | if (io->bio && (io->last_block_in_bio != fio->blk_addr - 1 || |
458e6197 JK |
251 | io->fio.rw != fio->rw)) |
252 | __submit_merged_bio(io); | |
93dfe2ac JK |
253 | alloc_new: |
254 | if (io->bio == NULL) { | |
90a893c7 | 255 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 256 | |
cf04e8eb | 257 | io->bio = __bio_alloc(sbi, fio->blk_addr, bio_blocks, is_read); |
458e6197 | 258 | io->fio = *fio; |
93dfe2ac JK |
259 | } |
260 | ||
4375a336 JK |
261 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
262 | ||
263 | if (bio_add_page(io->bio, bio_page, PAGE_CACHE_SIZE, 0) < | |
93dfe2ac | 264 | PAGE_CACHE_SIZE) { |
458e6197 | 265 | __submit_merged_bio(io); |
93dfe2ac JK |
266 | goto alloc_new; |
267 | } | |
268 | ||
cf04e8eb | 269 | io->last_block_in_bio = fio->blk_addr; |
05ca3632 | 270 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 271 | |
df0f8dc0 | 272 | up_write(&io->io_rwsem); |
05ca3632 | 273 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
274 | } |
275 | ||
0a8165d7 | 276 | /* |
eb47b800 JK |
277 | * Lock ordering for the change of data block address: |
278 | * ->data_page | |
279 | * ->node_page | |
280 | * update block addresses in the node page | |
281 | */ | |
216a620a | 282 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 JK |
283 | { |
284 | struct f2fs_node *rn; | |
285 | __le32 *addr_array; | |
286 | struct page *node_page = dn->node_page; | |
287 | unsigned int ofs_in_node = dn->ofs_in_node; | |
288 | ||
fec1d657 | 289 | f2fs_wait_on_page_writeback(node_page, NODE, true); |
eb47b800 | 290 | |
45590710 | 291 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
292 | |
293 | /* Get physical address of data block */ | |
294 | addr_array = blkaddr_in_node(rn); | |
e1509cf2 | 295 | addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
12719ae1 JK |
296 | if (set_page_dirty(node_page)) |
297 | dn->node_changed = true; | |
eb47b800 JK |
298 | } |
299 | ||
300 | int reserve_new_block(struct dnode_of_data *dn) | |
301 | { | |
4081363f | 302 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 303 | |
6bacf52f | 304 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 305 | return -EPERM; |
cfb271d4 | 306 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
307 | return -ENOSPC; |
308 | ||
c01e2853 NJ |
309 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
310 | ||
eb47b800 | 311 | dn->data_blkaddr = NEW_ADDR; |
216a620a | 312 | set_data_blkaddr(dn); |
a18ff063 | 313 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
314 | sync_inode_page(dn); |
315 | return 0; | |
316 | } | |
317 | ||
b600965c HL |
318 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
319 | { | |
320 | bool need_put = dn->inode_page ? false : true; | |
321 | int err; | |
322 | ||
323 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
324 | if (err) | |
325 | return err; | |
a8865372 | 326 | |
b600965c HL |
327 | if (dn->data_blkaddr == NULL_ADDR) |
328 | err = reserve_new_block(dn); | |
a8865372 | 329 | if (err || need_put) |
b600965c HL |
330 | f2fs_put_dnode(dn); |
331 | return err; | |
332 | } | |
333 | ||
759af1c9 | 334 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 335 | { |
028a41e8 | 336 | struct extent_info ei; |
759af1c9 | 337 | struct inode *inode = dn->inode; |
028a41e8 | 338 | |
759af1c9 FL |
339 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
340 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
341 | return 0; | |
429511cd | 342 | } |
028a41e8 | 343 | |
759af1c9 | 344 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
345 | } |
346 | ||
a56c7c6f JK |
347 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
348 | int rw, bool for_write) | |
eb47b800 | 349 | { |
eb47b800 JK |
350 | struct address_space *mapping = inode->i_mapping; |
351 | struct dnode_of_data dn; | |
352 | struct page *page; | |
cb3bc9ee | 353 | struct extent_info ei; |
eb47b800 | 354 | int err; |
cf04e8eb | 355 | struct f2fs_io_info fio = { |
05ca3632 | 356 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 357 | .type = DATA, |
43f3eae1 | 358 | .rw = rw, |
4375a336 | 359 | .encrypted_page = NULL, |
cf04e8eb | 360 | }; |
eb47b800 | 361 | |
4375a336 JK |
362 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
363 | return read_mapping_page(mapping, index, NULL); | |
364 | ||
a56c7c6f | 365 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
366 | if (!page) |
367 | return ERR_PTR(-ENOMEM); | |
368 | ||
cb3bc9ee CY |
369 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
370 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
371 | goto got_it; | |
372 | } | |
373 | ||
eb47b800 | 374 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 375 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
376 | if (err) |
377 | goto put_err; | |
eb47b800 JK |
378 | f2fs_put_dnode(&dn); |
379 | ||
6bacf52f | 380 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
381 | err = -ENOENT; |
382 | goto put_err; | |
650495de | 383 | } |
cb3bc9ee | 384 | got_it: |
43f3eae1 JK |
385 | if (PageUptodate(page)) { |
386 | unlock_page(page); | |
eb47b800 | 387 | return page; |
43f3eae1 | 388 | } |
eb47b800 | 389 | |
d59ff4df JK |
390 | /* |
391 | * A new dentry page is allocated but not able to be written, since its | |
392 | * new inode page couldn't be allocated due to -ENOSPC. | |
393 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
394 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
395 | */ | |
396 | if (dn.data_blkaddr == NEW_ADDR) { | |
397 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
398 | SetPageUptodate(page); | |
43f3eae1 | 399 | unlock_page(page); |
d59ff4df JK |
400 | return page; |
401 | } | |
eb47b800 | 402 | |
cf04e8eb | 403 | fio.blk_addr = dn.data_blkaddr; |
05ca3632 JK |
404 | fio.page = page; |
405 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 406 | if (err) |
86531d6b | 407 | goto put_err; |
43f3eae1 | 408 | return page; |
86531d6b JK |
409 | |
410 | put_err: | |
411 | f2fs_put_page(page, 1); | |
412 | return ERR_PTR(err); | |
43f3eae1 JK |
413 | } |
414 | ||
415 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
416 | { | |
417 | struct address_space *mapping = inode->i_mapping; | |
418 | struct page *page; | |
419 | ||
420 | page = find_get_page(mapping, index); | |
421 | if (page && PageUptodate(page)) | |
422 | return page; | |
423 | f2fs_put_page(page, 0); | |
424 | ||
a56c7c6f | 425 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
426 | if (IS_ERR(page)) |
427 | return page; | |
428 | ||
429 | if (PageUptodate(page)) | |
430 | return page; | |
431 | ||
432 | wait_on_page_locked(page); | |
433 | if (unlikely(!PageUptodate(page))) { | |
434 | f2fs_put_page(page, 0); | |
435 | return ERR_PTR(-EIO); | |
436 | } | |
437 | return page; | |
438 | } | |
439 | ||
440 | /* | |
441 | * If it tries to access a hole, return an error. | |
442 | * Because, the callers, functions in dir.c and GC, should be able to know | |
443 | * whether this page exists or not. | |
444 | */ | |
a56c7c6f JK |
445 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
446 | bool for_write) | |
43f3eae1 JK |
447 | { |
448 | struct address_space *mapping = inode->i_mapping; | |
449 | struct page *page; | |
450 | repeat: | |
a56c7c6f | 451 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
452 | if (IS_ERR(page)) |
453 | return page; | |
393ff91f | 454 | |
43f3eae1 | 455 | /* wait for read completion */ |
393ff91f | 456 | lock_page(page); |
6bacf52f | 457 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
458 | f2fs_put_page(page, 1); |
459 | return ERR_PTR(-EIO); | |
eb47b800 | 460 | } |
6bacf52f | 461 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
462 | f2fs_put_page(page, 1); |
463 | goto repeat; | |
eb47b800 JK |
464 | } |
465 | return page; | |
466 | } | |
467 | ||
0a8165d7 | 468 | /* |
eb47b800 JK |
469 | * Caller ensures that this data page is never allocated. |
470 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 471 | * |
4f4124d0 CY |
472 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
473 | * f2fs_unlock_op(). | |
470f00e9 CY |
474 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
475 | * ipage should be released by this function. | |
eb47b800 | 476 | */ |
64aa7ed9 | 477 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 478 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 479 | { |
eb47b800 JK |
480 | struct address_space *mapping = inode->i_mapping; |
481 | struct page *page; | |
482 | struct dnode_of_data dn; | |
483 | int err; | |
7612118a | 484 | |
a56c7c6f | 485 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
486 | if (!page) { |
487 | /* | |
488 | * before exiting, we should make sure ipage will be released | |
489 | * if any error occur. | |
490 | */ | |
491 | f2fs_put_page(ipage, 1); | |
01f28610 | 492 | return ERR_PTR(-ENOMEM); |
470f00e9 | 493 | } |
eb47b800 | 494 | |
a8865372 | 495 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 496 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
497 | if (err) { |
498 | f2fs_put_page(page, 1); | |
eb47b800 | 499 | return ERR_PTR(err); |
a8865372 | 500 | } |
01f28610 JK |
501 | if (!ipage) |
502 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
503 | |
504 | if (PageUptodate(page)) | |
01f28610 | 505 | goto got_it; |
eb47b800 JK |
506 | |
507 | if (dn.data_blkaddr == NEW_ADDR) { | |
508 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 509 | SetPageUptodate(page); |
eb47b800 | 510 | } else { |
4375a336 | 511 | f2fs_put_page(page, 1); |
a8865372 | 512 | |
7612118a JK |
513 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
514 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
515 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 516 | if (IS_ERR(page)) |
7612118a | 517 | return page; |
eb47b800 | 518 | } |
01f28610 | 519 | got_it: |
9edcdabf CY |
520 | if (new_i_size && i_size_read(inode) < |
521 | ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)) { | |
522 | i_size_write(inode, ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
523 | /* Only the directory inode sets new_i_size */ |
524 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
525 | } |
526 | return page; | |
527 | } | |
528 | ||
bfad7c2d JK |
529 | static int __allocate_data_block(struct dnode_of_data *dn) |
530 | { | |
4081363f | 531 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 532 | struct f2fs_summary sum; |
bfad7c2d | 533 | struct node_info ni; |
38aa0889 | 534 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 535 | pgoff_t fofs; |
bfad7c2d JK |
536 | |
537 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
538 | return -EPERM; | |
df6136ef CY |
539 | |
540 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
541 | if (dn->data_blkaddr == NEW_ADDR) | |
542 | goto alloc; | |
543 | ||
bfad7c2d JK |
544 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
545 | return -ENOSPC; | |
546 | ||
df6136ef | 547 | alloc: |
bfad7c2d JK |
548 | get_node_info(sbi, dn->nid, &ni); |
549 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
550 | ||
38aa0889 JK |
551 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
552 | seg = CURSEG_DIRECT_IO; | |
553 | ||
df6136ef CY |
554 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
555 | &sum, seg); | |
216a620a | 556 | set_data_blkaddr(dn); |
bfad7c2d | 557 | |
976e4c50 | 558 | /* update i_size */ |
81ca7350 | 559 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 560 | dn->ofs_in_node; |
9edcdabf CY |
561 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)) |
562 | i_size_write(dn->inode, | |
563 | ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)); | |
bfad7c2d JK |
564 | return 0; |
565 | } | |
566 | ||
6d5a1495 | 567 | static int __allocate_data_blocks(struct inode *inode, loff_t offset, |
59b802e5 JK |
568 | size_t count) |
569 | { | |
5b8db7fa | 570 | struct f2fs_map_blocks map; |
59b802e5 | 571 | |
5b8db7fa CY |
572 | map.m_lblk = F2FS_BYTES_TO_BLK(offset); |
573 | map.m_len = F2FS_BYTES_TO_BLK(count); | |
da85985c | 574 | map.m_next_pgofs = NULL; |
2a340760 | 575 | |
5b8db7fa | 576 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_DIO); |
59b802e5 JK |
577 | } |
578 | ||
0a8165d7 | 579 | /* |
003a3e1d JK |
580 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
581 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
582 | * If original data blocks are allocated, then give them to blockdev. |
583 | * Otherwise, | |
584 | * a. preallocate requested block addresses | |
585 | * b. do not use extent cache for better performance | |
586 | * c. give the block addresses to blockdev | |
eb47b800 | 587 | */ |
d323d005 | 588 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 589 | int create, int flag) |
eb47b800 | 590 | { |
003a3e1d | 591 | unsigned int maxblocks = map->m_len; |
eb47b800 | 592 | struct dnode_of_data dn; |
f9811703 | 593 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
bfad7c2d JK |
594 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
595 | pgoff_t pgofs, end_offset; | |
596 | int err = 0, ofs = 1; | |
a2e7d1bf | 597 | struct extent_info ei; |
bfad7c2d | 598 | bool allocated = false; |
7df3a431 | 599 | block_t blkaddr; |
eb47b800 | 600 | |
003a3e1d JK |
601 | map->m_len = 0; |
602 | map->m_flags = 0; | |
603 | ||
604 | /* it only supports block size == page size */ | |
605 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 606 | |
7e4dde79 | 607 | if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
608 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
609 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
610 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 611 | goto out; |
a2e7d1bf | 612 | } |
bfad7c2d | 613 | |
4fe71e88 | 614 | next_dnode: |
59b802e5 | 615 | if (create) |
3104af35 | 616 | f2fs_lock_op(sbi); |
eb47b800 JK |
617 | |
618 | /* When reading holes, we need its node page */ | |
619 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 620 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 621 | if (err) { |
da85985c | 622 | if (err == -ENOENT) { |
bfad7c2d | 623 | err = 0; |
da85985c CY |
624 | if (map->m_next_pgofs) |
625 | *map->m_next_pgofs = | |
626 | get_next_page_offset(&dn, pgofs); | |
627 | } | |
bfad7c2d | 628 | goto unlock_out; |
848753aa | 629 | } |
973163fc | 630 | |
81ca7350 | 631 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
632 | |
633 | next_block: | |
634 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
635 | ||
636 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 637 | if (create) { |
f9811703 CY |
638 | if (unlikely(f2fs_cp_error(sbi))) { |
639 | err = -EIO; | |
4fe71e88 | 640 | goto sync_out; |
f9811703 | 641 | } |
973163fc CY |
642 | err = __allocate_data_block(&dn); |
643 | if (err) | |
4fe71e88 | 644 | goto sync_out; |
973163fc CY |
645 | allocated = true; |
646 | map->m_flags = F2FS_MAP_NEW; | |
4fe71e88 | 647 | blkaddr = dn.data_blkaddr; |
973163fc | 648 | } else { |
da85985c CY |
649 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
650 | blkaddr == NULL_ADDR) { | |
651 | if (map->m_next_pgofs) | |
652 | *map->m_next_pgofs = pgofs + 1; | |
653 | } | |
973163fc | 654 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
4fe71e88 | 655 | blkaddr != NEW_ADDR) { |
973163fc CY |
656 | if (flag == F2FS_GET_BLOCK_BMAP) |
657 | err = -ENOENT; | |
4fe71e88 | 658 | goto sync_out; |
973163fc | 659 | } |
e2b4e2bc | 660 | } |
e2b4e2bc | 661 | } |
eb47b800 | 662 | |
4fe71e88 CY |
663 | if (map->m_len == 0) { |
664 | /* preallocated unwritten block should be mapped for fiemap. */ | |
665 | if (blkaddr == NEW_ADDR) | |
666 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
667 | map->m_flags |= F2FS_MAP_MAPPED; | |
668 | ||
669 | map->m_pblk = blkaddr; | |
670 | map->m_len = 1; | |
671 | } else if ((map->m_pblk != NEW_ADDR && | |
672 | blkaddr == (map->m_pblk + ofs)) || | |
673 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR)) { | |
674 | ofs++; | |
675 | map->m_len++; | |
676 | } else { | |
677 | goto sync_out; | |
678 | } | |
bfad7c2d | 679 | |
bfad7c2d JK |
680 | dn.ofs_in_node++; |
681 | pgofs++; | |
682 | ||
4fe71e88 CY |
683 | if (map->m_len < maxblocks) { |
684 | if (dn.ofs_in_node < end_offset) | |
685 | goto next_block; | |
7df3a431 | 686 | |
bfad7c2d JK |
687 | if (allocated) |
688 | sync_inode_page(&dn); | |
bfad7c2d JK |
689 | f2fs_put_dnode(&dn); |
690 | ||
3104af35 CY |
691 | if (create) { |
692 | f2fs_unlock_op(sbi); | |
3c082b7b | 693 | f2fs_balance_fs(sbi, allocated); |
3104af35 | 694 | } |
3c082b7b | 695 | allocated = false; |
4fe71e88 | 696 | goto next_dnode; |
eb47b800 | 697 | } |
7df3a431 | 698 | |
bfad7c2d JK |
699 | sync_out: |
700 | if (allocated) | |
701 | sync_inode_page(&dn); | |
eb47b800 | 702 | f2fs_put_dnode(&dn); |
bfad7c2d | 703 | unlock_out: |
2a340760 | 704 | if (create) { |
3104af35 | 705 | f2fs_unlock_op(sbi); |
3c082b7b | 706 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 707 | } |
bfad7c2d | 708 | out: |
003a3e1d | 709 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 710 | return err; |
eb47b800 JK |
711 | } |
712 | ||
003a3e1d | 713 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
714 | struct buffer_head *bh, int create, int flag, |
715 | pgoff_t *next_pgofs) | |
003a3e1d JK |
716 | { |
717 | struct f2fs_map_blocks map; | |
718 | int ret; | |
719 | ||
720 | map.m_lblk = iblock; | |
721 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 722 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 723 | |
e2b4e2bc | 724 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
725 | if (!ret) { |
726 | map_bh(bh, inode->i_sb, map.m_pblk); | |
727 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
728 | bh->b_size = map.m_len << inode->i_blkbits; | |
729 | } | |
730 | return ret; | |
731 | } | |
732 | ||
ccfb3000 | 733 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
734 | struct buffer_head *bh_result, int create, int flag, |
735 | pgoff_t *next_pgofs) | |
e2b4e2bc | 736 | { |
da85985c CY |
737 | return __get_data_block(inode, iblock, bh_result, create, |
738 | flag, next_pgofs); | |
e2b4e2bc CY |
739 | } |
740 | ||
741 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
742 | struct buffer_head *bh_result, int create) |
743 | { | |
e2b4e2bc | 744 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 745 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
746 | } |
747 | ||
e2b4e2bc | 748 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
749 | struct buffer_head *bh_result, int create) |
750 | { | |
179448bf | 751 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 752 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
753 | return -EFBIG; |
754 | ||
e2b4e2bc | 755 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 756 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
757 | } |
758 | ||
7f63eb77 JK |
759 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
760 | { | |
761 | return (offset >> inode->i_blkbits); | |
762 | } | |
763 | ||
764 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
765 | { | |
766 | return (blk << inode->i_blkbits); | |
767 | } | |
768 | ||
9ab70134 JK |
769 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
770 | u64 start, u64 len) | |
771 | { | |
7f63eb77 JK |
772 | struct buffer_head map_bh; |
773 | sector_t start_blk, last_blk; | |
da85985c | 774 | pgoff_t next_pgofs; |
de1475cc | 775 | loff_t isize; |
7f63eb77 JK |
776 | u64 logical = 0, phys = 0, size = 0; |
777 | u32 flags = 0; | |
7f63eb77 JK |
778 | int ret = 0; |
779 | ||
780 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
781 | if (ret) | |
782 | return ret; | |
783 | ||
67f8cf3c JK |
784 | if (f2fs_has_inline_data(inode)) { |
785 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
786 | if (ret != -EAGAIN) | |
787 | return ret; | |
788 | } | |
789 | ||
5955102c | 790 | inode_lock(inode); |
de1475cc FL |
791 | |
792 | isize = i_size_read(inode); | |
9a950d52 FL |
793 | if (start >= isize) |
794 | goto out; | |
7f63eb77 | 795 | |
9a950d52 FL |
796 | if (start + len > isize) |
797 | len = isize - start; | |
7f63eb77 JK |
798 | |
799 | if (logical_to_blk(inode, len) == 0) | |
800 | len = blk_to_logical(inode, 1); | |
801 | ||
802 | start_blk = logical_to_blk(inode, start); | |
803 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 804 | |
7f63eb77 JK |
805 | next: |
806 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
807 | map_bh.b_size = len; | |
808 | ||
e2b4e2bc | 809 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 810 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
811 | if (ret) |
812 | goto out; | |
813 | ||
814 | /* HOLE */ | |
815 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 816 | start_blk = next_pgofs; |
9a950d52 | 817 | /* Go through holes util pass the EOF */ |
da85985c | 818 | if (blk_to_logical(inode, start_blk) < isize) |
9a950d52 FL |
819 | goto prep_next; |
820 | /* Found a hole beyond isize means no more extents. | |
821 | * Note that the premise is that filesystems don't | |
822 | * punch holes beyond isize and keep size unchanged. | |
823 | */ | |
824 | flags |= FIEMAP_EXTENT_LAST; | |
825 | } | |
7f63eb77 | 826 | |
da5af127 CY |
827 | if (size) { |
828 | if (f2fs_encrypted_inode(inode)) | |
829 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
830 | ||
9a950d52 FL |
831 | ret = fiemap_fill_next_extent(fieinfo, logical, |
832 | phys, size, flags); | |
da5af127 | 833 | } |
7f63eb77 | 834 | |
9a950d52 FL |
835 | if (start_blk > last_blk || ret) |
836 | goto out; | |
7f63eb77 | 837 | |
9a950d52 FL |
838 | logical = blk_to_logical(inode, start_blk); |
839 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
840 | size = map_bh.b_size; | |
841 | flags = 0; | |
842 | if (buffer_unwritten(&map_bh)) | |
843 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 844 | |
9a950d52 | 845 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 846 | |
9a950d52 | 847 | prep_next: |
7f63eb77 JK |
848 | cond_resched(); |
849 | if (fatal_signal_pending(current)) | |
850 | ret = -EINTR; | |
851 | else | |
852 | goto next; | |
853 | out: | |
854 | if (ret == 1) | |
855 | ret = 0; | |
856 | ||
5955102c | 857 | inode_unlock(inode); |
7f63eb77 | 858 | return ret; |
9ab70134 JK |
859 | } |
860 | ||
f1e88660 JK |
861 | /* |
862 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
863 | * Major change was from block_size == page_size in f2fs by default. | |
864 | */ | |
865 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
866 | struct list_head *pages, struct page *page, | |
867 | unsigned nr_pages) | |
868 | { | |
869 | struct bio *bio = NULL; | |
870 | unsigned page_idx; | |
871 | sector_t last_block_in_bio = 0; | |
872 | struct inode *inode = mapping->host; | |
873 | const unsigned blkbits = inode->i_blkbits; | |
874 | const unsigned blocksize = 1 << blkbits; | |
875 | sector_t block_in_file; | |
876 | sector_t last_block; | |
877 | sector_t last_block_in_file; | |
878 | sector_t block_nr; | |
879 | struct block_device *bdev = inode->i_sb->s_bdev; | |
880 | struct f2fs_map_blocks map; | |
881 | ||
882 | map.m_pblk = 0; | |
883 | map.m_lblk = 0; | |
884 | map.m_len = 0; | |
885 | map.m_flags = 0; | |
da85985c | 886 | map.m_next_pgofs = NULL; |
f1e88660 JK |
887 | |
888 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
889 | ||
890 | prefetchw(&page->flags); | |
891 | if (pages) { | |
892 | page = list_entry(pages->prev, struct page, lru); | |
893 | list_del(&page->lru); | |
894 | if (add_to_page_cache_lru(page, mapping, | |
895 | page->index, GFP_KERNEL)) | |
896 | goto next_page; | |
897 | } | |
898 | ||
899 | block_in_file = (sector_t)page->index; | |
900 | last_block = block_in_file + nr_pages; | |
901 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
902 | blkbits; | |
903 | if (last_block > last_block_in_file) | |
904 | last_block = last_block_in_file; | |
905 | ||
906 | /* | |
907 | * Map blocks using the previous result first. | |
908 | */ | |
909 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
910 | block_in_file > map.m_lblk && | |
911 | block_in_file < (map.m_lblk + map.m_len)) | |
912 | goto got_it; | |
913 | ||
914 | /* | |
915 | * Then do more f2fs_map_blocks() calls until we are | |
916 | * done with this page. | |
917 | */ | |
918 | map.m_flags = 0; | |
919 | ||
920 | if (block_in_file < last_block) { | |
921 | map.m_lblk = block_in_file; | |
922 | map.m_len = last_block - block_in_file; | |
923 | ||
46c9e141 | 924 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 925 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
926 | goto set_error_page; |
927 | } | |
928 | got_it: | |
929 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
930 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
931 | SetPageMappedToDisk(page); | |
932 | ||
933 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
934 | SetPageUptodate(page); | |
935 | goto confused; | |
936 | } | |
937 | } else { | |
938 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
939 | SetPageUptodate(page); | |
940 | unlock_page(page); | |
941 | goto next_page; | |
942 | } | |
943 | ||
944 | /* | |
945 | * This page will go to BIO. Do we need to send this | |
946 | * BIO off first? | |
947 | */ | |
948 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
949 | submit_and_realloc: | |
950 | submit_bio(READ, bio); | |
951 | bio = NULL; | |
952 | } | |
953 | if (bio == NULL) { | |
4375a336 JK |
954 | struct f2fs_crypto_ctx *ctx = NULL; |
955 | ||
956 | if (f2fs_encrypted_inode(inode) && | |
957 | S_ISREG(inode->i_mode)) { | |
4375a336 JK |
958 | |
959 | ctx = f2fs_get_crypto_ctx(inode); | |
960 | if (IS_ERR(ctx)) | |
961 | goto set_error_page; | |
962 | ||
963 | /* wait the page to be moved by cleaning */ | |
08b39fbd CY |
964 | f2fs_wait_on_encrypted_page_writeback( |
965 | F2FS_I_SB(inode), block_nr); | |
4375a336 JK |
966 | } |
967 | ||
f1e88660 | 968 | bio = bio_alloc(GFP_KERNEL, |
b54ffb73 | 969 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
4375a336 JK |
970 | if (!bio) { |
971 | if (ctx) | |
972 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 973 | goto set_error_page; |
4375a336 | 974 | } |
f1e88660 JK |
975 | bio->bi_bdev = bdev; |
976 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 977 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 978 | bio->bi_private = ctx; |
f1e88660 JK |
979 | } |
980 | ||
981 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
982 | goto submit_and_realloc; | |
983 | ||
984 | last_block_in_bio = block_nr; | |
985 | goto next_page; | |
986 | set_error_page: | |
987 | SetPageError(page); | |
988 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
989 | unlock_page(page); | |
990 | goto next_page; | |
991 | confused: | |
992 | if (bio) { | |
993 | submit_bio(READ, bio); | |
994 | bio = NULL; | |
995 | } | |
996 | unlock_page(page); | |
997 | next_page: | |
998 | if (pages) | |
999 | page_cache_release(page); | |
1000 | } | |
1001 | BUG_ON(pages && !list_empty(pages)); | |
1002 | if (bio) | |
1003 | submit_bio(READ, bio); | |
1004 | return 0; | |
1005 | } | |
1006 | ||
eb47b800 JK |
1007 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1008 | { | |
9ffe0fb5 | 1009 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1010 | int ret = -EAGAIN; |
9ffe0fb5 | 1011 | |
c20e89cd CY |
1012 | trace_f2fs_readpage(page, DATA); |
1013 | ||
e1c42045 | 1014 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1015 | if (f2fs_has_inline_data(inode)) |
1016 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1017 | if (ret == -EAGAIN) |
f1e88660 | 1018 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1019 | return ret; |
eb47b800 JK |
1020 | } |
1021 | ||
1022 | static int f2fs_read_data_pages(struct file *file, | |
1023 | struct address_space *mapping, | |
1024 | struct list_head *pages, unsigned nr_pages) | |
1025 | { | |
9ffe0fb5 | 1026 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1027 | struct page *page = list_entry(pages->prev, struct page, lru); |
1028 | ||
1029 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1030 | |
1031 | /* If the file has inline data, skip readpages */ | |
1032 | if (f2fs_has_inline_data(inode)) | |
1033 | return 0; | |
1034 | ||
f1e88660 | 1035 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1036 | } |
1037 | ||
05ca3632 | 1038 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1039 | { |
05ca3632 | 1040 | struct page *page = fio->page; |
eb47b800 | 1041 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1042 | struct dnode_of_data dn; |
1043 | int err = 0; | |
1044 | ||
1045 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1046 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1047 | if (err) |
1048 | return err; | |
1049 | ||
cf04e8eb | 1050 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
1051 | |
1052 | /* This page is already truncated */ | |
2bca1e23 JK |
1053 | if (fio->blk_addr == NULL_ADDR) { |
1054 | ClearPageUptodate(page); | |
eb47b800 | 1055 | goto out_writepage; |
2bca1e23 | 1056 | } |
eb47b800 | 1057 | |
4375a336 | 1058 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
08b39fbd CY |
1059 | |
1060 | /* wait for GCed encrypted page writeback */ | |
1061 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
1062 | fio->blk_addr); | |
1063 | ||
4375a336 JK |
1064 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); |
1065 | if (IS_ERR(fio->encrypted_page)) { | |
1066 | err = PTR_ERR(fio->encrypted_page); | |
1067 | goto out_writepage; | |
1068 | } | |
1069 | } | |
1070 | ||
eb47b800 JK |
1071 | set_page_writeback(page); |
1072 | ||
1073 | /* | |
1074 | * If current allocation needs SSR, | |
1075 | * it had better in-place writes for updated data. | |
1076 | */ | |
cf04e8eb | 1077 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 | 1078 | !is_cold_data(page) && |
2da3e027 | 1079 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1080 | need_inplace_update(inode))) { |
05ca3632 | 1081 | rewrite_data_page(fio); |
fff04f90 | 1082 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1083 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1084 | } else { |
05ca3632 | 1085 | write_data_page(&dn, fio); |
216a620a | 1086 | set_data_blkaddr(&dn); |
7e4dde79 | 1087 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1088 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1089 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1090 | if (page->index == 0) |
1091 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1092 | } |
1093 | out_writepage: | |
1094 | f2fs_put_dnode(&dn); | |
1095 | return err; | |
1096 | } | |
1097 | ||
1098 | static int f2fs_write_data_page(struct page *page, | |
1099 | struct writeback_control *wbc) | |
1100 | { | |
1101 | struct inode *inode = page->mapping->host; | |
4081363f | 1102 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1103 | loff_t i_size = i_size_read(inode); |
1104 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1105 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1106 | unsigned offset = 0; |
39936837 | 1107 | bool need_balance_fs = false; |
eb47b800 | 1108 | int err = 0; |
458e6197 | 1109 | struct f2fs_io_info fio = { |
05ca3632 | 1110 | .sbi = sbi, |
458e6197 | 1111 | .type = DATA, |
6c311ec6 | 1112 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1113 | .page = page, |
4375a336 | 1114 | .encrypted_page = NULL, |
458e6197 | 1115 | }; |
eb47b800 | 1116 | |
ecda0de3 CY |
1117 | trace_f2fs_writepage(page, DATA); |
1118 | ||
eb47b800 | 1119 | if (page->index < end_index) |
39936837 | 1120 | goto write; |
eb47b800 JK |
1121 | |
1122 | /* | |
1123 | * If the offset is out-of-range of file size, | |
1124 | * this page does not have to be written to disk. | |
1125 | */ | |
1126 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1127 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1128 | goto out; |
eb47b800 JK |
1129 | |
1130 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1131 | write: |
caf0047e | 1132 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1133 | goto redirty_out; |
1e84371f JK |
1134 | if (f2fs_is_drop_cache(inode)) |
1135 | goto out; | |
1136 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1137 | available_free_memory(sbi, BASE_CHECK)) | |
1138 | goto redirty_out; | |
eb47b800 | 1139 | |
39936837 | 1140 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1141 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1142 | if (unlikely(f2fs_cp_error(sbi))) |
1143 | goto redirty_out; | |
05ca3632 | 1144 | err = do_write_data_page(&fio); |
8618b881 JK |
1145 | goto done; |
1146 | } | |
9ffe0fb5 | 1147 | |
cf779cab JK |
1148 | /* we should bypass data pages to proceed the kworkder jobs */ |
1149 | if (unlikely(f2fs_cp_error(sbi))) { | |
1150 | SetPageError(page); | |
a7ffdbe2 | 1151 | goto out; |
cf779cab JK |
1152 | } |
1153 | ||
8618b881 | 1154 | if (!wbc->for_reclaim) |
39936837 | 1155 | need_balance_fs = true; |
8618b881 | 1156 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1157 | goto redirty_out; |
eb47b800 | 1158 | |
b3d208f9 | 1159 | err = -EAGAIN; |
8618b881 | 1160 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1161 | if (f2fs_has_inline_data(inode)) |
1162 | err = f2fs_write_inline_data(inode, page); | |
1163 | if (err == -EAGAIN) | |
05ca3632 | 1164 | err = do_write_data_page(&fio); |
8618b881 JK |
1165 | f2fs_unlock_op(sbi); |
1166 | done: | |
1167 | if (err && err != -ENOENT) | |
1168 | goto redirty_out; | |
eb47b800 | 1169 | |
eb47b800 | 1170 | clear_cold_data(page); |
39936837 | 1171 | out: |
a7ffdbe2 | 1172 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1173 | if (err) |
1174 | ClearPageUptodate(page); | |
0c3a5797 CY |
1175 | |
1176 | if (wbc->for_reclaim) { | |
1177 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1178 | remove_dirty_inode(inode); | |
1179 | } | |
1180 | ||
eb47b800 | 1181 | unlock_page(page); |
2c4db1a6 | 1182 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1183 | |
1184 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1185 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1186 | |
eb47b800 JK |
1187 | return 0; |
1188 | ||
eb47b800 | 1189 | redirty_out: |
76f60268 | 1190 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1191 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1192 | } |
1193 | ||
fa9150a8 NJ |
1194 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1195 | void *data) | |
1196 | { | |
1197 | struct address_space *mapping = data; | |
1198 | int ret = mapping->a_ops->writepage(page, wbc); | |
1199 | mapping_set_error(mapping, ret); | |
1200 | return ret; | |
1201 | } | |
1202 | ||
8f46dcae CY |
1203 | /* |
1204 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1205 | * The major change is making write step of cold data page separately from | |
1206 | * warm/hot data page. | |
1207 | */ | |
1208 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1209 | struct writeback_control *wbc, writepage_t writepage, | |
1210 | void *data) | |
1211 | { | |
1212 | int ret = 0; | |
1213 | int done = 0; | |
1214 | struct pagevec pvec; | |
1215 | int nr_pages; | |
1216 | pgoff_t uninitialized_var(writeback_index); | |
1217 | pgoff_t index; | |
1218 | pgoff_t end; /* Inclusive */ | |
1219 | pgoff_t done_index; | |
1220 | int cycled; | |
1221 | int range_whole = 0; | |
1222 | int tag; | |
1223 | int step = 0; | |
1224 | ||
1225 | pagevec_init(&pvec, 0); | |
1226 | next: | |
1227 | if (wbc->range_cyclic) { | |
1228 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1229 | index = writeback_index; | |
1230 | if (index == 0) | |
1231 | cycled = 1; | |
1232 | else | |
1233 | cycled = 0; | |
1234 | end = -1; | |
1235 | } else { | |
1236 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1237 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1238 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1239 | range_whole = 1; | |
1240 | cycled = 1; /* ignore range_cyclic tests */ | |
1241 | } | |
1242 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1243 | tag = PAGECACHE_TAG_TOWRITE; | |
1244 | else | |
1245 | tag = PAGECACHE_TAG_DIRTY; | |
1246 | retry: | |
1247 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1248 | tag_pages_for_writeback(mapping, index, end); | |
1249 | done_index = index; | |
1250 | while (!done && (index <= end)) { | |
1251 | int i; | |
1252 | ||
1253 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1254 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1255 | if (nr_pages == 0) | |
1256 | break; | |
1257 | ||
1258 | for (i = 0; i < nr_pages; i++) { | |
1259 | struct page *page = pvec.pages[i]; | |
1260 | ||
1261 | if (page->index > end) { | |
1262 | done = 1; | |
1263 | break; | |
1264 | } | |
1265 | ||
1266 | done_index = page->index; | |
1267 | ||
1268 | lock_page(page); | |
1269 | ||
1270 | if (unlikely(page->mapping != mapping)) { | |
1271 | continue_unlock: | |
1272 | unlock_page(page); | |
1273 | continue; | |
1274 | } | |
1275 | ||
1276 | if (!PageDirty(page)) { | |
1277 | /* someone wrote it for us */ | |
1278 | goto continue_unlock; | |
1279 | } | |
1280 | ||
737f1899 | 1281 | if (step == is_cold_data(page)) |
8f46dcae CY |
1282 | goto continue_unlock; |
1283 | ||
1284 | if (PageWriteback(page)) { | |
1285 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1286 | f2fs_wait_on_page_writeback(page, |
1287 | DATA, true); | |
8f46dcae CY |
1288 | else |
1289 | goto continue_unlock; | |
1290 | } | |
1291 | ||
1292 | BUG_ON(PageWriteback(page)); | |
1293 | if (!clear_page_dirty_for_io(page)) | |
1294 | goto continue_unlock; | |
1295 | ||
1296 | ret = (*writepage)(page, wbc, data); | |
1297 | if (unlikely(ret)) { | |
1298 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1299 | unlock_page(page); | |
1300 | ret = 0; | |
1301 | } else { | |
1302 | done_index = page->index + 1; | |
1303 | done = 1; | |
1304 | break; | |
1305 | } | |
1306 | } | |
1307 | ||
1308 | if (--wbc->nr_to_write <= 0 && | |
1309 | wbc->sync_mode == WB_SYNC_NONE) { | |
1310 | done = 1; | |
1311 | break; | |
1312 | } | |
1313 | } | |
1314 | pagevec_release(&pvec); | |
1315 | cond_resched(); | |
1316 | } | |
1317 | ||
1318 | if (step < 1) { | |
1319 | step++; | |
1320 | goto next; | |
1321 | } | |
1322 | ||
1323 | if (!cycled && !done) { | |
1324 | cycled = 1; | |
1325 | index = 0; | |
1326 | end = writeback_index - 1; | |
1327 | goto retry; | |
1328 | } | |
1329 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1330 | mapping->writeback_index = done_index; | |
1331 | ||
1332 | return ret; | |
1333 | } | |
1334 | ||
25ca923b | 1335 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1336 | struct writeback_control *wbc) |
1337 | { | |
1338 | struct inode *inode = mapping->host; | |
4081363f | 1339 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1340 | bool locked = false; |
eb47b800 | 1341 | int ret; |
50c8cdb3 | 1342 | long diff; |
eb47b800 | 1343 | |
cfb185a1 | 1344 | /* deal with chardevs and other special file */ |
1345 | if (!mapping->a_ops->writepage) | |
1346 | return 0; | |
1347 | ||
6a290544 CY |
1348 | /* skip writing if there is no dirty page in this inode */ |
1349 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1350 | return 0; | |
1351 | ||
a1257023 JK |
1352 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1353 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1354 | available_free_memory(sbi, DIRTY_DENTS)) | |
1355 | goto skip_write; | |
1356 | ||
d323d005 CY |
1357 | /* skip writing during file defragment */ |
1358 | if (is_inode_flag_set(F2FS_I(inode), FI_DO_DEFRAG)) | |
1359 | goto skip_write; | |
1360 | ||
d5669f7b JK |
1361 | /* during POR, we don't need to trigger writepage at all. */ |
1362 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1363 | goto skip_write; | |
1364 | ||
d31c7c3f YH |
1365 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1366 | ||
50c8cdb3 | 1367 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1368 | |
25c13551 | 1369 | if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) { |
5463e7c1 JK |
1370 | mutex_lock(&sbi->writepages); |
1371 | locked = true; | |
1372 | } | |
8f46dcae | 1373 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
0c3a5797 | 1374 | f2fs_submit_merged_bio_cond(sbi, inode, NULL, 0, DATA, WRITE); |
5463e7c1 JK |
1375 | if (locked) |
1376 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1377 | |
c227f912 | 1378 | remove_dirty_inode(inode); |
eb47b800 | 1379 | |
50c8cdb3 | 1380 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1381 | return ret; |
d3baf95d JK |
1382 | |
1383 | skip_write: | |
a7ffdbe2 | 1384 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1385 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1386 | return 0; |
eb47b800 JK |
1387 | } |
1388 | ||
3aab8f82 CY |
1389 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1390 | { | |
1391 | struct inode *inode = mapping->host; | |
819d9153 | 1392 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1393 | |
819d9153 JK |
1394 | if (to > i_size) { |
1395 | truncate_pagecache(inode, i_size); | |
1396 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1397 | } |
1398 | } | |
1399 | ||
2aadac08 JK |
1400 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1401 | struct page *page, loff_t pos, unsigned len, | |
1402 | block_t *blk_addr, bool *node_changed) | |
1403 | { | |
1404 | struct inode *inode = page->mapping->host; | |
1405 | pgoff_t index = page->index; | |
1406 | struct dnode_of_data dn; | |
1407 | struct page *ipage; | |
b4d07a3e JK |
1408 | bool locked = false; |
1409 | struct extent_info ei; | |
2aadac08 JK |
1410 | int err = 0; |
1411 | ||
b4d07a3e JK |
1412 | if (f2fs_has_inline_data(inode) || |
1413 | (pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1414 | f2fs_lock_op(sbi); | |
1415 | locked = true; | |
1416 | } | |
1417 | restart: | |
2aadac08 JK |
1418 | /* check inline_data */ |
1419 | ipage = get_node_page(sbi, inode->i_ino); | |
1420 | if (IS_ERR(ipage)) { | |
1421 | err = PTR_ERR(ipage); | |
1422 | goto unlock_out; | |
1423 | } | |
1424 | ||
1425 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1426 | ||
1427 | if (f2fs_has_inline_data(inode)) { | |
1428 | if (pos + len <= MAX_INLINE_DATA) { | |
1429 | read_inline_data(page, ipage); | |
1430 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
2049d4fc | 1431 | set_inline_node(ipage); |
2aadac08 JK |
1432 | } else { |
1433 | err = f2fs_convert_inline_page(&dn, page); | |
1434 | if (err) | |
b4d07a3e JK |
1435 | goto out; |
1436 | if (dn.data_blkaddr == NULL_ADDR) | |
1437 | err = f2fs_get_block(&dn, index); | |
1438 | } | |
1439 | } else if (locked) { | |
1440 | err = f2fs_get_block(&dn, index); | |
1441 | } else { | |
1442 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1443 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1444 | } else { | |
b4d07a3e JK |
1445 | /* hole case */ |
1446 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
b483fadf | 1447 | if (err || (!err && dn.data_blkaddr == NULL_ADDR)) { |
b4d07a3e JK |
1448 | f2fs_put_dnode(&dn); |
1449 | f2fs_lock_op(sbi); | |
1450 | locked = true; | |
1451 | goto restart; | |
1452 | } | |
2aadac08 JK |
1453 | } |
1454 | } | |
b4d07a3e | 1455 | |
2aadac08 JK |
1456 | /* convert_inline_page can make node_changed */ |
1457 | *blk_addr = dn.data_blkaddr; | |
1458 | *node_changed = dn.node_changed; | |
b4d07a3e | 1459 | out: |
2aadac08 JK |
1460 | f2fs_put_dnode(&dn); |
1461 | unlock_out: | |
b4d07a3e JK |
1462 | if (locked) |
1463 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1464 | return err; |
1465 | } | |
1466 | ||
eb47b800 JK |
1467 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1468 | loff_t pos, unsigned len, unsigned flags, | |
1469 | struct page **pagep, void **fsdata) | |
1470 | { | |
1471 | struct inode *inode = mapping->host; | |
4081363f | 1472 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1473 | struct page *page = NULL; |
eb47b800 | 1474 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
2aadac08 JK |
1475 | bool need_balance = false; |
1476 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1477 | int err = 0; |
1478 | ||
62aed044 CY |
1479 | trace_f2fs_write_begin(inode, pos, len, flags); |
1480 | ||
5f727395 JK |
1481 | /* |
1482 | * We should check this at this moment to avoid deadlock on inode page | |
1483 | * and #0 page. The locking rule for inline_data conversion should be: | |
1484 | * lock_page(page #0) -> lock_page(inode_page) | |
1485 | */ | |
1486 | if (index != 0) { | |
1487 | err = f2fs_convert_inline_inode(inode); | |
1488 | if (err) | |
1489 | goto fail; | |
1490 | } | |
afcb7ca0 | 1491 | repeat: |
eb47b800 | 1492 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1493 | if (!page) { |
1494 | err = -ENOMEM; | |
1495 | goto fail; | |
1496 | } | |
d5f66990 | 1497 | |
eb47b800 JK |
1498 | *pagep = page; |
1499 | ||
2aadac08 JK |
1500 | err = prepare_write_begin(sbi, page, pos, len, |
1501 | &blkaddr, &need_balance); | |
9ba69cf9 | 1502 | if (err) |
2aadac08 | 1503 | goto fail; |
9ba69cf9 | 1504 | |
2aadac08 | 1505 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 | 1506 | unlock_page(page); |
2c4db1a6 | 1507 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1508 | lock_page(page); |
1509 | if (page->mapping != mapping) { | |
1510 | /* The page got truncated from under us */ | |
1511 | f2fs_put_page(page, 1); | |
1512 | goto repeat; | |
1513 | } | |
1514 | } | |
1515 | ||
fec1d657 | 1516 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1517 | |
08b39fbd CY |
1518 | /* wait for GCed encrypted page writeback */ |
1519 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1520 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1521 | |
90d4388a CY |
1522 | if (len == PAGE_CACHE_SIZE) |
1523 | goto out_update; | |
1524 | if (PageUptodate(page)) | |
1525 | goto out_clear; | |
eb47b800 JK |
1526 | |
1527 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1528 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1529 | unsigned end = start + len; | |
1530 | ||
1531 | /* Reading beyond i_size is simple: memset to zero */ | |
1532 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
90d4388a | 1533 | goto out_update; |
eb47b800 JK |
1534 | } |
1535 | ||
2aadac08 | 1536 | if (blkaddr == NEW_ADDR) { |
eb47b800 JK |
1537 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1538 | } else { | |
cf04e8eb | 1539 | struct f2fs_io_info fio = { |
05ca3632 | 1540 | .sbi = sbi, |
cf04e8eb JK |
1541 | .type = DATA, |
1542 | .rw = READ_SYNC, | |
2aadac08 | 1543 | .blk_addr = blkaddr, |
05ca3632 | 1544 | .page = page, |
4375a336 | 1545 | .encrypted_page = NULL, |
cf04e8eb | 1546 | }; |
05ca3632 | 1547 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1548 | if (err) |
1549 | goto fail; | |
d54c795b | 1550 | |
393ff91f | 1551 | lock_page(page); |
6bacf52f | 1552 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1553 | err = -EIO; |
1554 | goto fail; | |
eb47b800 | 1555 | } |
6bacf52f | 1556 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1557 | f2fs_put_page(page, 1); |
1558 | goto repeat; | |
eb47b800 | 1559 | } |
4375a336 JK |
1560 | |
1561 | /* avoid symlink page */ | |
1562 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1563 | err = f2fs_decrypt_one(inode, page); | |
86531d6b | 1564 | if (err) |
4375a336 | 1565 | goto fail; |
4375a336 | 1566 | } |
eb47b800 | 1567 | } |
90d4388a | 1568 | out_update: |
eb47b800 | 1569 | SetPageUptodate(page); |
90d4388a | 1570 | out_clear: |
eb47b800 JK |
1571 | clear_cold_data(page); |
1572 | return 0; | |
9ba69cf9 | 1573 | |
3aab8f82 | 1574 | fail: |
86531d6b | 1575 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1576 | f2fs_write_failed(mapping, pos + len); |
1577 | return err; | |
eb47b800 JK |
1578 | } |
1579 | ||
a1dd3c13 JK |
1580 | static int f2fs_write_end(struct file *file, |
1581 | struct address_space *mapping, | |
1582 | loff_t pos, unsigned len, unsigned copied, | |
1583 | struct page *page, void *fsdata) | |
1584 | { | |
1585 | struct inode *inode = page->mapping->host; | |
1586 | ||
dfb2bf38 CY |
1587 | trace_f2fs_write_end(inode, pos, len, copied); |
1588 | ||
34ba94ba | 1589 | set_page_dirty(page); |
a1dd3c13 JK |
1590 | |
1591 | if (pos + copied > i_size_read(inode)) { | |
1592 | i_size_write(inode, pos + copied); | |
1593 | mark_inode_dirty(inode); | |
a1dd3c13 JK |
1594 | } |
1595 | ||
75c3c8bc | 1596 | f2fs_put_page(page, 1); |
d0239e1b | 1597 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1598 | return copied; |
1599 | } | |
1600 | ||
6f673763 OS |
1601 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1602 | loff_t offset) | |
944fcfc1 JK |
1603 | { |
1604 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1605 | |
944fcfc1 JK |
1606 | if (offset & blocksize_mask) |
1607 | return -EINVAL; | |
1608 | ||
5b46f25d AV |
1609 | if (iov_iter_alignment(iter) & blocksize_mask) |
1610 | return -EINVAL; | |
1611 | ||
944fcfc1 JK |
1612 | return 0; |
1613 | } | |
1614 | ||
22c6186e OS |
1615 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1616 | loff_t offset) | |
eb47b800 JK |
1617 | { |
1618 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1619 | struct address_space *mapping = file->f_mapping; |
1620 | struct inode *inode = mapping->host; | |
1621 | size_t count = iov_iter_count(iter); | |
1622 | int err; | |
944fcfc1 | 1623 | |
b3d208f9 | 1624 | /* we don't need to use inline_data strictly */ |
b9d777b8 JK |
1625 | err = f2fs_convert_inline_inode(inode); |
1626 | if (err) | |
1627 | return err; | |
9ffe0fb5 | 1628 | |
fcc85a4d JK |
1629 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1630 | return 0; | |
1631 | ||
c15e8599 CY |
1632 | err = check_direct_IO(inode, iter, offset); |
1633 | if (err) | |
1634 | return err; | |
944fcfc1 | 1635 | |
6f673763 | 1636 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1637 | |
f9811703 | 1638 | if (iov_iter_rw(iter) == WRITE) { |
6d5a1495 CY |
1639 | err = __allocate_data_blocks(inode, offset, count); |
1640 | if (err) | |
f9811703 | 1641 | goto out; |
f9811703 | 1642 | } |
59b802e5 | 1643 | |
e2b4e2bc | 1644 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
f9811703 | 1645 | out: |
6f673763 | 1646 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1647 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1648 | |
6f673763 | 1649 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1650 | |
3aab8f82 | 1651 | return err; |
eb47b800 JK |
1652 | } |
1653 | ||
487261f3 CY |
1654 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1655 | unsigned int length) | |
eb47b800 JK |
1656 | { |
1657 | struct inode *inode = page->mapping->host; | |
487261f3 | 1658 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1659 | |
487261f3 CY |
1660 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1661 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1662 | return; |
1663 | ||
487261f3 CY |
1664 | if (PageDirty(page)) { |
1665 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1666 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1667 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1668 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1669 | else | |
1670 | inode_dec_dirty_pages(inode); | |
1671 | } | |
decd36b6 CY |
1672 | |
1673 | /* This is atomic written page, keep Private */ | |
1674 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1675 | return; | |
1676 | ||
eb47b800 JK |
1677 | ClearPagePrivate(page); |
1678 | } | |
1679 | ||
487261f3 | 1680 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1681 | { |
f68daeeb JK |
1682 | /* If this is dirty page, keep PagePrivate */ |
1683 | if (PageDirty(page)) | |
1684 | return 0; | |
1685 | ||
decd36b6 CY |
1686 | /* This is atomic written page, keep Private */ |
1687 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1688 | return 0; | |
1689 | ||
eb47b800 | 1690 | ClearPagePrivate(page); |
c3850aa1 | 1691 | return 1; |
eb47b800 JK |
1692 | } |
1693 | ||
1694 | static int f2fs_set_data_page_dirty(struct page *page) | |
1695 | { | |
1696 | struct address_space *mapping = page->mapping; | |
1697 | struct inode *inode = mapping->host; | |
1698 | ||
26c6b887 JK |
1699 | trace_f2fs_set_page_dirty(page, DATA); |
1700 | ||
eb47b800 | 1701 | SetPageUptodate(page); |
34ba94ba | 1702 | |
1e84371f | 1703 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1704 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1705 | register_inmem_page(inode, page); | |
1706 | return 1; | |
1707 | } | |
1708 | /* | |
1709 | * Previously, this page has been registered, we just | |
1710 | * return here. | |
1711 | */ | |
1712 | return 0; | |
34ba94ba JK |
1713 | } |
1714 | ||
eb47b800 JK |
1715 | if (!PageDirty(page)) { |
1716 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1717 | update_dirty_page(inode, page); |
eb47b800 JK |
1718 | return 1; |
1719 | } | |
1720 | return 0; | |
1721 | } | |
1722 | ||
c01e54b7 JK |
1723 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1724 | { | |
454ae7e5 CY |
1725 | struct inode *inode = mapping->host; |
1726 | ||
1d373a0e JK |
1727 | if (f2fs_has_inline_data(inode)) |
1728 | return 0; | |
1729 | ||
1730 | /* make sure allocating whole blocks */ | |
1731 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1732 | filemap_write_and_wait(mapping); | |
1733 | ||
e2b4e2bc | 1734 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1735 | } |
1736 | ||
eb47b800 JK |
1737 | const struct address_space_operations f2fs_dblock_aops = { |
1738 | .readpage = f2fs_read_data_page, | |
1739 | .readpages = f2fs_read_data_pages, | |
1740 | .writepage = f2fs_write_data_page, | |
1741 | .writepages = f2fs_write_data_pages, | |
1742 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1743 | .write_end = f2fs_write_end, |
eb47b800 | 1744 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1745 | .invalidatepage = f2fs_invalidate_page, |
1746 | .releasepage = f2fs_release_page, | |
eb47b800 | 1747 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1748 | .bmap = f2fs_bmap, |
eb47b800 | 1749 | }; |