Commit | Line | Data |
---|---|---|
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 | |
93dfe2ac JK |
77 | if (!get_pages(sbi, F2FS_WRITEBACK) && |
78 | !list_empty(&sbi->cp_wait.task_list)) | |
79 | wake_up(&sbi->cp_wait); | |
80 | ||
81 | bio_put(bio); | |
82 | } | |
83 | ||
940a6d34 GZ |
84 | /* |
85 | * Low-level block read/write IO operations. | |
86 | */ | |
87 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
88 | int npages, bool is_read) | |
89 | { | |
90 | struct bio *bio; | |
91 | ||
740432f8 | 92 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
93 | |
94 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 95 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 96 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 97 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
98 | |
99 | return bio; | |
100 | } | |
101 | ||
458e6197 | 102 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 103 | { |
458e6197 | 104 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
105 | |
106 | if (!io->bio) | |
107 | return; | |
108 | ||
6a8f8ca5 | 109 | if (is_read_io(fio->rw)) |
2ace38e0 | 110 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 111 | else |
2ace38e0 | 112 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 113 | |
6a8f8ca5 | 114 | submit_bio(fio->rw, io->bio); |
93dfe2ac JK |
115 | io->bio = NULL; |
116 | } | |
117 | ||
0fd785eb CY |
118 | bool is_merged_page(struct f2fs_sb_info *sbi, struct page *page, |
119 | enum page_type type) | |
120 | { | |
121 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
122 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
123 | struct bio_vec *bvec; | |
124 | struct page *target; | |
125 | int i; | |
126 | ||
127 | down_read(&io->io_rwsem); | |
128 | if (!io->bio) { | |
129 | up_read(&io->io_rwsem); | |
130 | return false; | |
131 | } | |
132 | ||
133 | bio_for_each_segment_all(bvec, io->bio, i) { | |
134 | ||
135 | if (bvec->bv_page->mapping) { | |
136 | target = bvec->bv_page; | |
137 | } else { | |
138 | struct f2fs_crypto_ctx *ctx; | |
139 | ||
140 | /* encrypted page */ | |
141 | ctx = (struct f2fs_crypto_ctx *)page_private( | |
142 | bvec->bv_page); | |
143 | target = ctx->w.control_page; | |
144 | } | |
145 | ||
146 | if (page == target) { | |
147 | up_read(&io->io_rwsem); | |
148 | return true; | |
149 | } | |
150 | } | |
151 | ||
152 | up_read(&io->io_rwsem); | |
153 | return false; | |
154 | } | |
155 | ||
93dfe2ac | 156 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, |
458e6197 | 157 | enum page_type type, int rw) |
93dfe2ac JK |
158 | { |
159 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
160 | struct f2fs_bio_info *io; | |
161 | ||
162 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
163 | ||
df0f8dc0 | 164 | down_write(&io->io_rwsem); |
458e6197 JK |
165 | |
166 | /* change META to META_FLUSH in the checkpoint procedure */ | |
167 | if (type >= META_FLUSH) { | |
168 | io->fio.type = META_FLUSH; | |
0f7b2abd JK |
169 | if (test_opt(sbi, NOBARRIER)) |
170 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
171 | else | |
172 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; | |
458e6197 JK |
173 | } |
174 | __submit_merged_bio(io); | |
df0f8dc0 | 175 | up_write(&io->io_rwsem); |
93dfe2ac JK |
176 | } |
177 | ||
178 | /* | |
179 | * Fill the locked page with data located in the block address. | |
180 | * Return unlocked page. | |
181 | */ | |
05ca3632 | 182 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 183 | { |
93dfe2ac | 184 | struct bio *bio; |
4375a336 | 185 | struct page *page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
93dfe2ac | 186 | |
2ace38e0 | 187 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 188 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
189 | |
190 | /* Allocate a new bio */ | |
05ca3632 | 191 | bio = __bio_alloc(fio->sbi, fio->blk_addr, 1, is_read_io(fio->rw)); |
93dfe2ac JK |
192 | |
193 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
194 | bio_put(bio); | |
93dfe2ac JK |
195 | return -EFAULT; |
196 | } | |
197 | ||
cf04e8eb | 198 | submit_bio(fio->rw, bio); |
93dfe2ac JK |
199 | return 0; |
200 | } | |
201 | ||
05ca3632 | 202 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 203 | { |
05ca3632 | 204 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 205 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 206 | struct f2fs_bio_info *io; |
940a6d34 | 207 | bool is_read = is_read_io(fio->rw); |
4375a336 | 208 | struct page *bio_page; |
93dfe2ac | 209 | |
940a6d34 | 210 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 211 | |
cf04e8eb | 212 | verify_block_addr(sbi, fio->blk_addr); |
93dfe2ac | 213 | |
df0f8dc0 | 214 | down_write(&io->io_rwsem); |
93dfe2ac | 215 | |
940a6d34 | 216 | if (!is_read) |
93dfe2ac JK |
217 | inc_page_count(sbi, F2FS_WRITEBACK); |
218 | ||
cf04e8eb | 219 | if (io->bio && (io->last_block_in_bio != fio->blk_addr - 1 || |
458e6197 JK |
220 | io->fio.rw != fio->rw)) |
221 | __submit_merged_bio(io); | |
93dfe2ac JK |
222 | alloc_new: |
223 | if (io->bio == NULL) { | |
90a893c7 | 224 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 225 | |
cf04e8eb | 226 | io->bio = __bio_alloc(sbi, fio->blk_addr, bio_blocks, is_read); |
458e6197 | 227 | io->fio = *fio; |
93dfe2ac JK |
228 | } |
229 | ||
4375a336 JK |
230 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
231 | ||
232 | if (bio_add_page(io->bio, bio_page, PAGE_CACHE_SIZE, 0) < | |
93dfe2ac | 233 | PAGE_CACHE_SIZE) { |
458e6197 | 234 | __submit_merged_bio(io); |
93dfe2ac JK |
235 | goto alloc_new; |
236 | } | |
237 | ||
cf04e8eb | 238 | io->last_block_in_bio = fio->blk_addr; |
05ca3632 | 239 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 240 | |
df0f8dc0 | 241 | up_write(&io->io_rwsem); |
05ca3632 | 242 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
243 | } |
244 | ||
0a8165d7 | 245 | /* |
eb47b800 JK |
246 | * Lock ordering for the change of data block address: |
247 | * ->data_page | |
248 | * ->node_page | |
249 | * update block addresses in the node page | |
250 | */ | |
216a620a | 251 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 JK |
252 | { |
253 | struct f2fs_node *rn; | |
254 | __le32 *addr_array; | |
255 | struct page *node_page = dn->node_page; | |
256 | unsigned int ofs_in_node = dn->ofs_in_node; | |
257 | ||
fec1d657 | 258 | f2fs_wait_on_page_writeback(node_page, NODE, true); |
eb47b800 | 259 | |
45590710 | 260 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
261 | |
262 | /* Get physical address of data block */ | |
263 | addr_array = blkaddr_in_node(rn); | |
e1509cf2 | 264 | addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
12719ae1 JK |
265 | if (set_page_dirty(node_page)) |
266 | dn->node_changed = true; | |
eb47b800 JK |
267 | } |
268 | ||
269 | int reserve_new_block(struct dnode_of_data *dn) | |
270 | { | |
4081363f | 271 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 272 | |
6bacf52f | 273 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 274 | return -EPERM; |
cfb271d4 | 275 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
276 | return -ENOSPC; |
277 | ||
c01e2853 NJ |
278 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
279 | ||
eb47b800 | 280 | dn->data_blkaddr = NEW_ADDR; |
216a620a | 281 | set_data_blkaddr(dn); |
a18ff063 | 282 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
283 | sync_inode_page(dn); |
284 | return 0; | |
285 | } | |
286 | ||
b600965c HL |
287 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
288 | { | |
289 | bool need_put = dn->inode_page ? false : true; | |
290 | int err; | |
291 | ||
292 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
293 | if (err) | |
294 | return err; | |
a8865372 | 295 | |
b600965c HL |
296 | if (dn->data_blkaddr == NULL_ADDR) |
297 | err = reserve_new_block(dn); | |
a8865372 | 298 | if (err || need_put) |
b600965c HL |
299 | f2fs_put_dnode(dn); |
300 | return err; | |
301 | } | |
302 | ||
759af1c9 | 303 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 304 | { |
028a41e8 | 305 | struct extent_info ei; |
759af1c9 | 306 | struct inode *inode = dn->inode; |
028a41e8 | 307 | |
759af1c9 FL |
308 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
309 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
310 | return 0; | |
429511cd | 311 | } |
028a41e8 | 312 | |
759af1c9 | 313 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
314 | } |
315 | ||
a56c7c6f JK |
316 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
317 | int rw, bool for_write) | |
eb47b800 | 318 | { |
eb47b800 JK |
319 | struct address_space *mapping = inode->i_mapping; |
320 | struct dnode_of_data dn; | |
321 | struct page *page; | |
cb3bc9ee | 322 | struct extent_info ei; |
eb47b800 | 323 | int err; |
cf04e8eb | 324 | struct f2fs_io_info fio = { |
05ca3632 | 325 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 326 | .type = DATA, |
43f3eae1 | 327 | .rw = rw, |
4375a336 | 328 | .encrypted_page = NULL, |
cf04e8eb | 329 | }; |
eb47b800 | 330 | |
4375a336 JK |
331 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
332 | return read_mapping_page(mapping, index, NULL); | |
333 | ||
a56c7c6f | 334 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
335 | if (!page) |
336 | return ERR_PTR(-ENOMEM); | |
337 | ||
cb3bc9ee CY |
338 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
339 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
340 | goto got_it; | |
341 | } | |
342 | ||
eb47b800 | 343 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 344 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
345 | if (err) |
346 | goto put_err; | |
eb47b800 JK |
347 | f2fs_put_dnode(&dn); |
348 | ||
6bacf52f | 349 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
350 | err = -ENOENT; |
351 | goto put_err; | |
650495de | 352 | } |
cb3bc9ee | 353 | got_it: |
43f3eae1 JK |
354 | if (PageUptodate(page)) { |
355 | unlock_page(page); | |
eb47b800 | 356 | return page; |
43f3eae1 | 357 | } |
eb47b800 | 358 | |
d59ff4df JK |
359 | /* |
360 | * A new dentry page is allocated but not able to be written, since its | |
361 | * new inode page couldn't be allocated due to -ENOSPC. | |
362 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
363 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
364 | */ | |
365 | if (dn.data_blkaddr == NEW_ADDR) { | |
366 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
367 | SetPageUptodate(page); | |
43f3eae1 | 368 | unlock_page(page); |
d59ff4df JK |
369 | return page; |
370 | } | |
eb47b800 | 371 | |
cf04e8eb | 372 | fio.blk_addr = dn.data_blkaddr; |
05ca3632 JK |
373 | fio.page = page; |
374 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 375 | if (err) |
86531d6b | 376 | goto put_err; |
43f3eae1 | 377 | return page; |
86531d6b JK |
378 | |
379 | put_err: | |
380 | f2fs_put_page(page, 1); | |
381 | return ERR_PTR(err); | |
43f3eae1 JK |
382 | } |
383 | ||
384 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
385 | { | |
386 | struct address_space *mapping = inode->i_mapping; | |
387 | struct page *page; | |
388 | ||
389 | page = find_get_page(mapping, index); | |
390 | if (page && PageUptodate(page)) | |
391 | return page; | |
392 | f2fs_put_page(page, 0); | |
393 | ||
a56c7c6f | 394 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
395 | if (IS_ERR(page)) |
396 | return page; | |
397 | ||
398 | if (PageUptodate(page)) | |
399 | return page; | |
400 | ||
401 | wait_on_page_locked(page); | |
402 | if (unlikely(!PageUptodate(page))) { | |
403 | f2fs_put_page(page, 0); | |
404 | return ERR_PTR(-EIO); | |
405 | } | |
406 | return page; | |
407 | } | |
408 | ||
409 | /* | |
410 | * If it tries to access a hole, return an error. | |
411 | * Because, the callers, functions in dir.c and GC, should be able to know | |
412 | * whether this page exists or not. | |
413 | */ | |
a56c7c6f JK |
414 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
415 | bool for_write) | |
43f3eae1 JK |
416 | { |
417 | struct address_space *mapping = inode->i_mapping; | |
418 | struct page *page; | |
419 | repeat: | |
a56c7c6f | 420 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
421 | if (IS_ERR(page)) |
422 | return page; | |
393ff91f | 423 | |
43f3eae1 | 424 | /* wait for read completion */ |
393ff91f | 425 | lock_page(page); |
6bacf52f | 426 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
427 | f2fs_put_page(page, 1); |
428 | return ERR_PTR(-EIO); | |
eb47b800 | 429 | } |
6bacf52f | 430 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
431 | f2fs_put_page(page, 1); |
432 | goto repeat; | |
eb47b800 JK |
433 | } |
434 | return page; | |
435 | } | |
436 | ||
0a8165d7 | 437 | /* |
eb47b800 JK |
438 | * Caller ensures that this data page is never allocated. |
439 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 440 | * |
4f4124d0 CY |
441 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
442 | * f2fs_unlock_op(). | |
470f00e9 CY |
443 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
444 | * ipage should be released by this function. | |
eb47b800 | 445 | */ |
64aa7ed9 | 446 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 447 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 448 | { |
eb47b800 JK |
449 | struct address_space *mapping = inode->i_mapping; |
450 | struct page *page; | |
451 | struct dnode_of_data dn; | |
452 | int err; | |
7612118a | 453 | |
a56c7c6f | 454 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
455 | if (!page) { |
456 | /* | |
457 | * before exiting, we should make sure ipage will be released | |
458 | * if any error occur. | |
459 | */ | |
460 | f2fs_put_page(ipage, 1); | |
01f28610 | 461 | return ERR_PTR(-ENOMEM); |
470f00e9 | 462 | } |
eb47b800 | 463 | |
a8865372 | 464 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 465 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
466 | if (err) { |
467 | f2fs_put_page(page, 1); | |
eb47b800 | 468 | return ERR_PTR(err); |
a8865372 | 469 | } |
01f28610 JK |
470 | if (!ipage) |
471 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
472 | |
473 | if (PageUptodate(page)) | |
01f28610 | 474 | goto got_it; |
eb47b800 JK |
475 | |
476 | if (dn.data_blkaddr == NEW_ADDR) { | |
477 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 478 | SetPageUptodate(page); |
eb47b800 | 479 | } else { |
4375a336 | 480 | f2fs_put_page(page, 1); |
a8865372 | 481 | |
7612118a JK |
482 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
483 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
484 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 485 | if (IS_ERR(page)) |
7612118a | 486 | return page; |
eb47b800 | 487 | } |
01f28610 | 488 | got_it: |
9edcdabf CY |
489 | if (new_i_size && i_size_read(inode) < |
490 | ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)) { | |
491 | i_size_write(inode, ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
492 | /* Only the directory inode sets new_i_size */ |
493 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
494 | } |
495 | return page; | |
496 | } | |
497 | ||
bfad7c2d JK |
498 | static int __allocate_data_block(struct dnode_of_data *dn) |
499 | { | |
4081363f | 500 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
976e4c50 | 501 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); |
bfad7c2d | 502 | struct f2fs_summary sum; |
bfad7c2d | 503 | struct node_info ni; |
38aa0889 | 504 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 505 | pgoff_t fofs; |
bfad7c2d JK |
506 | |
507 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
508 | return -EPERM; | |
df6136ef CY |
509 | |
510 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
511 | if (dn->data_blkaddr == NEW_ADDR) | |
512 | goto alloc; | |
513 | ||
bfad7c2d JK |
514 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
515 | return -ENOSPC; | |
516 | ||
df6136ef | 517 | alloc: |
bfad7c2d JK |
518 | get_node_info(sbi, dn->nid, &ni); |
519 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
520 | ||
38aa0889 JK |
521 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
522 | seg = CURSEG_DIRECT_IO; | |
523 | ||
df6136ef CY |
524 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
525 | &sum, seg); | |
216a620a | 526 | set_data_blkaddr(dn); |
bfad7c2d | 527 | |
976e4c50 JK |
528 | /* update i_size */ |
529 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + | |
530 | dn->ofs_in_node; | |
9edcdabf CY |
531 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)) |
532 | i_size_write(dn->inode, | |
533 | ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)); | |
bfad7c2d JK |
534 | return 0; |
535 | } | |
536 | ||
6d5a1495 | 537 | static int __allocate_data_blocks(struct inode *inode, loff_t offset, |
59b802e5 JK |
538 | size_t count) |
539 | { | |
540 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
541 | struct dnode_of_data dn; | |
542 | u64 start = F2FS_BYTES_TO_BLK(offset); | |
543 | u64 len = F2FS_BYTES_TO_BLK(count); | |
3c082b7b | 544 | bool allocated = false; |
59b802e5 | 545 | u64 end_offset; |
6d5a1495 | 546 | int err = 0; |
59b802e5 JK |
547 | |
548 | while (len) { | |
59b802e5 JK |
549 | f2fs_lock_op(sbi); |
550 | ||
551 | /* When reading holes, we need its node page */ | |
552 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
6d5a1495 CY |
553 | err = get_dnode_of_data(&dn, start, ALLOC_NODE); |
554 | if (err) | |
59b802e5 JK |
555 | goto out; |
556 | ||
557 | allocated = false; | |
558 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); | |
559 | ||
560 | while (dn.ofs_in_node < end_offset && len) { | |
d6d4f1cb CY |
561 | block_t blkaddr; |
562 | ||
6d5a1495 CY |
563 | if (unlikely(f2fs_cp_error(sbi))) { |
564 | err = -EIO; | |
f9811703 | 565 | goto sync_out; |
6d5a1495 | 566 | } |
f9811703 | 567 | |
d6d4f1cb | 568 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
df6136ef | 569 | if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) { |
6d5a1495 CY |
570 | err = __allocate_data_block(&dn); |
571 | if (err) | |
59b802e5 JK |
572 | goto sync_out; |
573 | allocated = true; | |
574 | } | |
575 | len--; | |
576 | start++; | |
577 | dn.ofs_in_node++; | |
578 | } | |
579 | ||
580 | if (allocated) | |
581 | sync_inode_page(&dn); | |
582 | ||
583 | f2fs_put_dnode(&dn); | |
584 | f2fs_unlock_op(sbi); | |
2a340760 | 585 | |
3c082b7b | 586 | f2fs_balance_fs(sbi, allocated); |
59b802e5 | 587 | } |
6d5a1495 | 588 | return err; |
59b802e5 JK |
589 | |
590 | sync_out: | |
591 | if (allocated) | |
592 | sync_inode_page(&dn); | |
593 | f2fs_put_dnode(&dn); | |
594 | out: | |
595 | f2fs_unlock_op(sbi); | |
3c082b7b | 596 | f2fs_balance_fs(sbi, allocated); |
6d5a1495 | 597 | return err; |
59b802e5 JK |
598 | } |
599 | ||
0a8165d7 | 600 | /* |
003a3e1d JK |
601 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
602 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
603 | * If original data blocks are allocated, then give them to blockdev. |
604 | * Otherwise, | |
605 | * a. preallocate requested block addresses | |
606 | * b. do not use extent cache for better performance | |
607 | * c. give the block addresses to blockdev | |
eb47b800 | 608 | */ |
d323d005 | 609 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 610 | int create, int flag) |
eb47b800 | 611 | { |
003a3e1d | 612 | unsigned int maxblocks = map->m_len; |
eb47b800 | 613 | struct dnode_of_data dn; |
f9811703 | 614 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
bfad7c2d JK |
615 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
616 | pgoff_t pgofs, end_offset; | |
617 | int err = 0, ofs = 1; | |
a2e7d1bf | 618 | struct extent_info ei; |
bfad7c2d | 619 | bool allocated = false; |
7df3a431 | 620 | block_t blkaddr; |
eb47b800 | 621 | |
003a3e1d JK |
622 | map->m_len = 0; |
623 | map->m_flags = 0; | |
624 | ||
625 | /* it only supports block size == page size */ | |
626 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 627 | |
7e4dde79 | 628 | if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
629 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
630 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
631 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 632 | goto out; |
a2e7d1bf | 633 | } |
bfad7c2d | 634 | |
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) { |
bfad7c2d JK |
642 | if (err == -ENOENT) |
643 | err = 0; | |
644 | goto unlock_out; | |
848753aa | 645 | } |
973163fc CY |
646 | |
647 | if (dn.data_blkaddr == NEW_ADDR || dn.data_blkaddr == NULL_ADDR) { | |
648 | if (create) { | |
f9811703 CY |
649 | if (unlikely(f2fs_cp_error(sbi))) { |
650 | err = -EIO; | |
651 | goto put_out; | |
652 | } | |
973163fc CY |
653 | err = __allocate_data_block(&dn); |
654 | if (err) | |
655 | goto put_out; | |
656 | allocated = true; | |
657 | map->m_flags = F2FS_MAP_NEW; | |
658 | } else { | |
659 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
660 | dn.data_blkaddr != NEW_ADDR) { | |
661 | if (flag == F2FS_GET_BLOCK_BMAP) | |
662 | err = -ENOENT; | |
663 | goto put_out; | |
664 | } | |
665 | ||
666 | /* | |
667 | * preallocated unwritten block should be mapped | |
668 | * for fiemap. | |
669 | */ | |
670 | if (dn.data_blkaddr == NEW_ADDR) | |
671 | map->m_flags = F2FS_MAP_UNWRITTEN; | |
e2b4e2bc | 672 | } |
e2b4e2bc | 673 | } |
eb47b800 | 674 | |
973163fc CY |
675 | map->m_flags |= F2FS_MAP_MAPPED; |
676 | map->m_pblk = dn.data_blkaddr; | |
677 | map->m_len = 1; | |
bfad7c2d | 678 | |
6403eb1f | 679 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d JK |
680 | dn.ofs_in_node++; |
681 | pgofs++; | |
682 | ||
683 | get_next: | |
7df3a431 FL |
684 | if (map->m_len >= maxblocks) |
685 | goto sync_out; | |
686 | ||
bfad7c2d JK |
687 | if (dn.ofs_in_node >= end_offset) { |
688 | if (allocated) | |
689 | sync_inode_page(&dn); | |
bfad7c2d JK |
690 | f2fs_put_dnode(&dn); |
691 | ||
3104af35 CY |
692 | if (create) { |
693 | f2fs_unlock_op(sbi); | |
3c082b7b | 694 | f2fs_balance_fs(sbi, allocated); |
3104af35 CY |
695 | f2fs_lock_op(sbi); |
696 | } | |
3c082b7b | 697 | allocated = false; |
3104af35 | 698 | |
bfad7c2d JK |
699 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
700 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 701 | if (err) { |
bfad7c2d JK |
702 | if (err == -ENOENT) |
703 | err = 0; | |
704 | goto unlock_out; | |
705 | } | |
e2b4e2bc | 706 | |
6403eb1f | 707 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 708 | } |
eb47b800 | 709 | |
7df3a431 | 710 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
973163fc | 711 | |
7df3a431 FL |
712 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { |
713 | if (create) { | |
714 | if (unlikely(f2fs_cp_error(sbi))) { | |
715 | err = -EIO; | |
716 | goto sync_out; | |
973163fc | 717 | } |
7df3a431 FL |
718 | err = __allocate_data_block(&dn); |
719 | if (err) | |
720 | goto sync_out; | |
721 | allocated = true; | |
722 | map->m_flags |= F2FS_MAP_NEW; | |
723 | blkaddr = dn.data_blkaddr; | |
724 | } else { | |
725 | /* | |
726 | * we only merge preallocated unwritten blocks | |
727 | * for fiemap. | |
728 | */ | |
729 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
730 | blkaddr != NEW_ADDR) | |
731 | goto sync_out; | |
bfad7c2d | 732 | } |
7df3a431 | 733 | } |
973163fc | 734 | |
7df3a431 FL |
735 | /* Give more consecutive addresses for the readahead */ |
736 | if ((map->m_pblk != NEW_ADDR && | |
737 | blkaddr == (map->m_pblk + ofs)) || | |
738 | (map->m_pblk == NEW_ADDR && | |
739 | blkaddr == NEW_ADDR)) { | |
740 | ofs++; | |
741 | dn.ofs_in_node++; | |
742 | pgofs++; | |
743 | map->m_len++; | |
744 | goto get_next; | |
eb47b800 | 745 | } |
7df3a431 | 746 | |
bfad7c2d JK |
747 | sync_out: |
748 | if (allocated) | |
749 | sync_inode_page(&dn); | |
750 | put_out: | |
eb47b800 | 751 | f2fs_put_dnode(&dn); |
bfad7c2d | 752 | unlock_out: |
2a340760 | 753 | if (create) { |
3104af35 | 754 | f2fs_unlock_op(sbi); |
3c082b7b | 755 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 756 | } |
bfad7c2d | 757 | out: |
003a3e1d | 758 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 759 | return err; |
eb47b800 JK |
760 | } |
761 | ||
003a3e1d | 762 | static int __get_data_block(struct inode *inode, sector_t iblock, |
e2b4e2bc | 763 | struct buffer_head *bh, int create, int flag) |
003a3e1d JK |
764 | { |
765 | struct f2fs_map_blocks map; | |
766 | int ret; | |
767 | ||
768 | map.m_lblk = iblock; | |
769 | map.m_len = bh->b_size >> inode->i_blkbits; | |
770 | ||
e2b4e2bc | 771 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
772 | if (!ret) { |
773 | map_bh(bh, inode->i_sb, map.m_pblk); | |
774 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
775 | bh->b_size = map.m_len << inode->i_blkbits; | |
776 | } | |
777 | return ret; | |
778 | } | |
779 | ||
ccfb3000 | 780 | static int get_data_block(struct inode *inode, sector_t iblock, |
e2b4e2bc CY |
781 | struct buffer_head *bh_result, int create, int flag) |
782 | { | |
783 | return __get_data_block(inode, iblock, bh_result, create, flag); | |
784 | } | |
785 | ||
786 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
787 | struct buffer_head *bh_result, int create) |
788 | { | |
e2b4e2bc CY |
789 | return __get_data_block(inode, iblock, bh_result, create, |
790 | F2FS_GET_BLOCK_DIO); | |
ccfb3000 JK |
791 | } |
792 | ||
e2b4e2bc | 793 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
794 | struct buffer_head *bh_result, int create) |
795 | { | |
179448bf | 796 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 797 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
798 | return -EFBIG; |
799 | ||
e2b4e2bc CY |
800 | return __get_data_block(inode, iblock, bh_result, create, |
801 | F2FS_GET_BLOCK_BMAP); | |
ccfb3000 JK |
802 | } |
803 | ||
7f63eb77 JK |
804 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
805 | { | |
806 | return (offset >> inode->i_blkbits); | |
807 | } | |
808 | ||
809 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
810 | { | |
811 | return (blk << inode->i_blkbits); | |
812 | } | |
813 | ||
9ab70134 JK |
814 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
815 | u64 start, u64 len) | |
816 | { | |
7f63eb77 JK |
817 | struct buffer_head map_bh; |
818 | sector_t start_blk, last_blk; | |
de1475cc | 819 | loff_t isize; |
7f63eb77 JK |
820 | u64 logical = 0, phys = 0, size = 0; |
821 | u32 flags = 0; | |
7f63eb77 JK |
822 | int ret = 0; |
823 | ||
824 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
825 | if (ret) | |
826 | return ret; | |
827 | ||
67f8cf3c JK |
828 | if (f2fs_has_inline_data(inode)) { |
829 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
830 | if (ret != -EAGAIN) | |
831 | return ret; | |
832 | } | |
833 | ||
5955102c | 834 | inode_lock(inode); |
de1475cc FL |
835 | |
836 | isize = i_size_read(inode); | |
9a950d52 FL |
837 | if (start >= isize) |
838 | goto out; | |
7f63eb77 | 839 | |
9a950d52 FL |
840 | if (start + len > isize) |
841 | len = isize - start; | |
7f63eb77 JK |
842 | |
843 | if (logical_to_blk(inode, len) == 0) | |
844 | len = blk_to_logical(inode, 1); | |
845 | ||
846 | start_blk = logical_to_blk(inode, start); | |
847 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 848 | |
7f63eb77 JK |
849 | next: |
850 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
851 | map_bh.b_size = len; | |
852 | ||
e2b4e2bc CY |
853 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
854 | F2FS_GET_BLOCK_FIEMAP); | |
7f63eb77 JK |
855 | if (ret) |
856 | goto out; | |
857 | ||
858 | /* HOLE */ | |
859 | if (!buffer_mapped(&map_bh)) { | |
9a950d52 FL |
860 | /* Go through holes util pass the EOF */ |
861 | if (blk_to_logical(inode, start_blk++) < isize) | |
862 | goto prep_next; | |
863 | /* Found a hole beyond isize means no more extents. | |
864 | * Note that the premise is that filesystems don't | |
865 | * punch holes beyond isize and keep size unchanged. | |
866 | */ | |
867 | flags |= FIEMAP_EXTENT_LAST; | |
868 | } | |
7f63eb77 | 869 | |
da5af127 CY |
870 | if (size) { |
871 | if (f2fs_encrypted_inode(inode)) | |
872 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
873 | ||
9a950d52 FL |
874 | ret = fiemap_fill_next_extent(fieinfo, logical, |
875 | phys, size, flags); | |
da5af127 | 876 | } |
7f63eb77 | 877 | |
9a950d52 FL |
878 | if (start_blk > last_blk || ret) |
879 | goto out; | |
7f63eb77 | 880 | |
9a950d52 FL |
881 | logical = blk_to_logical(inode, start_blk); |
882 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
883 | size = map_bh.b_size; | |
884 | flags = 0; | |
885 | if (buffer_unwritten(&map_bh)) | |
886 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 887 | |
9a950d52 | 888 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 889 | |
9a950d52 | 890 | prep_next: |
7f63eb77 JK |
891 | cond_resched(); |
892 | if (fatal_signal_pending(current)) | |
893 | ret = -EINTR; | |
894 | else | |
895 | goto next; | |
896 | out: | |
897 | if (ret == 1) | |
898 | ret = 0; | |
899 | ||
5955102c | 900 | inode_unlock(inode); |
7f63eb77 | 901 | return ret; |
9ab70134 JK |
902 | } |
903 | ||
f1e88660 JK |
904 | /* |
905 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
906 | * Major change was from block_size == page_size in f2fs by default. | |
907 | */ | |
908 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
909 | struct list_head *pages, struct page *page, | |
910 | unsigned nr_pages) | |
911 | { | |
912 | struct bio *bio = NULL; | |
913 | unsigned page_idx; | |
914 | sector_t last_block_in_bio = 0; | |
915 | struct inode *inode = mapping->host; | |
916 | const unsigned blkbits = inode->i_blkbits; | |
917 | const unsigned blocksize = 1 << blkbits; | |
918 | sector_t block_in_file; | |
919 | sector_t last_block; | |
920 | sector_t last_block_in_file; | |
921 | sector_t block_nr; | |
922 | struct block_device *bdev = inode->i_sb->s_bdev; | |
923 | struct f2fs_map_blocks map; | |
924 | ||
925 | map.m_pblk = 0; | |
926 | map.m_lblk = 0; | |
927 | map.m_len = 0; | |
928 | map.m_flags = 0; | |
929 | ||
930 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
931 | ||
932 | prefetchw(&page->flags); | |
933 | if (pages) { | |
934 | page = list_entry(pages->prev, struct page, lru); | |
935 | list_del(&page->lru); | |
936 | if (add_to_page_cache_lru(page, mapping, | |
937 | page->index, GFP_KERNEL)) | |
938 | goto next_page; | |
939 | } | |
940 | ||
941 | block_in_file = (sector_t)page->index; | |
942 | last_block = block_in_file + nr_pages; | |
943 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
944 | blkbits; | |
945 | if (last_block > last_block_in_file) | |
946 | last_block = last_block_in_file; | |
947 | ||
948 | /* | |
949 | * Map blocks using the previous result first. | |
950 | */ | |
951 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
952 | block_in_file > map.m_lblk && | |
953 | block_in_file < (map.m_lblk + map.m_len)) | |
954 | goto got_it; | |
955 | ||
956 | /* | |
957 | * Then do more f2fs_map_blocks() calls until we are | |
958 | * done with this page. | |
959 | */ | |
960 | map.m_flags = 0; | |
961 | ||
962 | if (block_in_file < last_block) { | |
963 | map.m_lblk = block_in_file; | |
964 | map.m_len = last_block - block_in_file; | |
965 | ||
46c9e141 CY |
966 | if (f2fs_map_blocks(inode, &map, 0, |
967 | F2FS_GET_BLOCK_READ)) | |
f1e88660 JK |
968 | goto set_error_page; |
969 | } | |
970 | got_it: | |
971 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
972 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
973 | SetPageMappedToDisk(page); | |
974 | ||
975 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
976 | SetPageUptodate(page); | |
977 | goto confused; | |
978 | } | |
979 | } else { | |
980 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
981 | SetPageUptodate(page); | |
982 | unlock_page(page); | |
983 | goto next_page; | |
984 | } | |
985 | ||
986 | /* | |
987 | * This page will go to BIO. Do we need to send this | |
988 | * BIO off first? | |
989 | */ | |
990 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
991 | submit_and_realloc: | |
992 | submit_bio(READ, bio); | |
993 | bio = NULL; | |
994 | } | |
995 | if (bio == NULL) { | |
4375a336 JK |
996 | struct f2fs_crypto_ctx *ctx = NULL; |
997 | ||
998 | if (f2fs_encrypted_inode(inode) && | |
999 | S_ISREG(inode->i_mode)) { | |
4375a336 JK |
1000 | |
1001 | ctx = f2fs_get_crypto_ctx(inode); | |
1002 | if (IS_ERR(ctx)) | |
1003 | goto set_error_page; | |
1004 | ||
1005 | /* wait the page to be moved by cleaning */ | |
08b39fbd CY |
1006 | f2fs_wait_on_encrypted_page_writeback( |
1007 | F2FS_I_SB(inode), block_nr); | |
4375a336 JK |
1008 | } |
1009 | ||
f1e88660 | 1010 | bio = bio_alloc(GFP_KERNEL, |
b54ffb73 | 1011 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
4375a336 JK |
1012 | if (!bio) { |
1013 | if (ctx) | |
1014 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 1015 | goto set_error_page; |
4375a336 | 1016 | } |
f1e88660 JK |
1017 | bio->bi_bdev = bdev; |
1018 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 1019 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 1020 | bio->bi_private = ctx; |
f1e88660 JK |
1021 | } |
1022 | ||
1023 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1024 | goto submit_and_realloc; | |
1025 | ||
1026 | last_block_in_bio = block_nr; | |
1027 | goto next_page; | |
1028 | set_error_page: | |
1029 | SetPageError(page); | |
1030 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
1031 | unlock_page(page); | |
1032 | goto next_page; | |
1033 | confused: | |
1034 | if (bio) { | |
1035 | submit_bio(READ, bio); | |
1036 | bio = NULL; | |
1037 | } | |
1038 | unlock_page(page); | |
1039 | next_page: | |
1040 | if (pages) | |
1041 | page_cache_release(page); | |
1042 | } | |
1043 | BUG_ON(pages && !list_empty(pages)); | |
1044 | if (bio) | |
1045 | submit_bio(READ, bio); | |
1046 | return 0; | |
1047 | } | |
1048 | ||
eb47b800 JK |
1049 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1050 | { | |
9ffe0fb5 | 1051 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1052 | int ret = -EAGAIN; |
9ffe0fb5 | 1053 | |
c20e89cd CY |
1054 | trace_f2fs_readpage(page, DATA); |
1055 | ||
e1c42045 | 1056 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1057 | if (f2fs_has_inline_data(inode)) |
1058 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1059 | if (ret == -EAGAIN) |
f1e88660 | 1060 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1061 | return ret; |
eb47b800 JK |
1062 | } |
1063 | ||
1064 | static int f2fs_read_data_pages(struct file *file, | |
1065 | struct address_space *mapping, | |
1066 | struct list_head *pages, unsigned nr_pages) | |
1067 | { | |
9ffe0fb5 | 1068 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1069 | struct page *page = list_entry(pages->prev, struct page, lru); |
1070 | ||
1071 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1072 | |
1073 | /* If the file has inline data, skip readpages */ | |
1074 | if (f2fs_has_inline_data(inode)) | |
1075 | return 0; | |
1076 | ||
f1e88660 | 1077 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1078 | } |
1079 | ||
05ca3632 | 1080 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1081 | { |
05ca3632 | 1082 | struct page *page = fio->page; |
eb47b800 | 1083 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1084 | struct dnode_of_data dn; |
1085 | int err = 0; | |
1086 | ||
1087 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1088 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1089 | if (err) |
1090 | return err; | |
1091 | ||
cf04e8eb | 1092 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
1093 | |
1094 | /* This page is already truncated */ | |
2bca1e23 JK |
1095 | if (fio->blk_addr == NULL_ADDR) { |
1096 | ClearPageUptodate(page); | |
eb47b800 | 1097 | goto out_writepage; |
2bca1e23 | 1098 | } |
eb47b800 | 1099 | |
4375a336 | 1100 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
08b39fbd CY |
1101 | |
1102 | /* wait for GCed encrypted page writeback */ | |
1103 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
1104 | fio->blk_addr); | |
1105 | ||
4375a336 JK |
1106 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); |
1107 | if (IS_ERR(fio->encrypted_page)) { | |
1108 | err = PTR_ERR(fio->encrypted_page); | |
1109 | goto out_writepage; | |
1110 | } | |
1111 | } | |
1112 | ||
eb47b800 JK |
1113 | set_page_writeback(page); |
1114 | ||
1115 | /* | |
1116 | * If current allocation needs SSR, | |
1117 | * it had better in-place writes for updated data. | |
1118 | */ | |
cf04e8eb | 1119 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 | 1120 | !is_cold_data(page) && |
2da3e027 | 1121 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1122 | need_inplace_update(inode))) { |
05ca3632 | 1123 | rewrite_data_page(fio); |
fff04f90 | 1124 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1125 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1126 | } else { |
05ca3632 | 1127 | write_data_page(&dn, fio); |
216a620a | 1128 | set_data_blkaddr(&dn); |
7e4dde79 | 1129 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1130 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1131 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1132 | if (page->index == 0) |
1133 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1134 | } |
1135 | out_writepage: | |
1136 | f2fs_put_dnode(&dn); | |
1137 | return err; | |
1138 | } | |
1139 | ||
1140 | static int f2fs_write_data_page(struct page *page, | |
1141 | struct writeback_control *wbc) | |
1142 | { | |
1143 | struct inode *inode = page->mapping->host; | |
4081363f | 1144 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1145 | loff_t i_size = i_size_read(inode); |
1146 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1147 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1148 | unsigned offset = 0; |
39936837 | 1149 | bool need_balance_fs = false; |
eb47b800 | 1150 | int err = 0; |
458e6197 | 1151 | struct f2fs_io_info fio = { |
05ca3632 | 1152 | .sbi = sbi, |
458e6197 | 1153 | .type = DATA, |
6c311ec6 | 1154 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1155 | .page = page, |
4375a336 | 1156 | .encrypted_page = NULL, |
458e6197 | 1157 | }; |
eb47b800 | 1158 | |
ecda0de3 CY |
1159 | trace_f2fs_writepage(page, DATA); |
1160 | ||
eb47b800 | 1161 | if (page->index < end_index) |
39936837 | 1162 | goto write; |
eb47b800 JK |
1163 | |
1164 | /* | |
1165 | * If the offset is out-of-range of file size, | |
1166 | * this page does not have to be written to disk. | |
1167 | */ | |
1168 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1169 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1170 | goto out; |
eb47b800 JK |
1171 | |
1172 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1173 | write: |
caf0047e | 1174 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1175 | goto redirty_out; |
1e84371f JK |
1176 | if (f2fs_is_drop_cache(inode)) |
1177 | goto out; | |
1178 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1179 | available_free_memory(sbi, BASE_CHECK)) | |
1180 | goto redirty_out; | |
eb47b800 | 1181 | |
39936837 | 1182 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1183 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1184 | if (unlikely(f2fs_cp_error(sbi))) |
1185 | goto redirty_out; | |
05ca3632 | 1186 | err = do_write_data_page(&fio); |
8618b881 JK |
1187 | goto done; |
1188 | } | |
9ffe0fb5 | 1189 | |
cf779cab JK |
1190 | /* we should bypass data pages to proceed the kworkder jobs */ |
1191 | if (unlikely(f2fs_cp_error(sbi))) { | |
1192 | SetPageError(page); | |
a7ffdbe2 | 1193 | goto out; |
cf779cab JK |
1194 | } |
1195 | ||
8618b881 | 1196 | if (!wbc->for_reclaim) |
39936837 | 1197 | need_balance_fs = true; |
8618b881 | 1198 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1199 | goto redirty_out; |
eb47b800 | 1200 | |
b3d208f9 | 1201 | err = -EAGAIN; |
8618b881 | 1202 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1203 | if (f2fs_has_inline_data(inode)) |
1204 | err = f2fs_write_inline_data(inode, page); | |
1205 | if (err == -EAGAIN) | |
05ca3632 | 1206 | err = do_write_data_page(&fio); |
8618b881 JK |
1207 | f2fs_unlock_op(sbi); |
1208 | done: | |
1209 | if (err && err != -ENOENT) | |
1210 | goto redirty_out; | |
eb47b800 | 1211 | |
eb47b800 | 1212 | clear_cold_data(page); |
39936837 | 1213 | out: |
a7ffdbe2 | 1214 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1215 | if (err) |
1216 | ClearPageUptodate(page); | |
eb47b800 | 1217 | unlock_page(page); |
2c4db1a6 | 1218 | f2fs_balance_fs(sbi, need_balance_fs); |
8d4ea29b | 1219 | if (wbc->for_reclaim || unlikely(f2fs_cp_error(sbi))) { |
2aea39ec | 1220 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
c227f912 | 1221 | remove_dirty_inode(inode); |
eb7e813c | 1222 | } |
eb47b800 JK |
1223 | return 0; |
1224 | ||
eb47b800 | 1225 | redirty_out: |
76f60268 | 1226 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1227 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1228 | } |
1229 | ||
fa9150a8 NJ |
1230 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1231 | void *data) | |
1232 | { | |
1233 | struct address_space *mapping = data; | |
1234 | int ret = mapping->a_ops->writepage(page, wbc); | |
1235 | mapping_set_error(mapping, ret); | |
1236 | return ret; | |
1237 | } | |
1238 | ||
8f46dcae CY |
1239 | /* |
1240 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1241 | * The major change is making write step of cold data page separately from | |
1242 | * warm/hot data page. | |
1243 | */ | |
1244 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1245 | struct writeback_control *wbc, writepage_t writepage, | |
1246 | void *data) | |
1247 | { | |
1248 | int ret = 0; | |
1249 | int done = 0; | |
1250 | struct pagevec pvec; | |
1251 | int nr_pages; | |
1252 | pgoff_t uninitialized_var(writeback_index); | |
1253 | pgoff_t index; | |
1254 | pgoff_t end; /* Inclusive */ | |
1255 | pgoff_t done_index; | |
1256 | int cycled; | |
1257 | int range_whole = 0; | |
1258 | int tag; | |
1259 | int step = 0; | |
1260 | ||
1261 | pagevec_init(&pvec, 0); | |
1262 | next: | |
1263 | if (wbc->range_cyclic) { | |
1264 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1265 | index = writeback_index; | |
1266 | if (index == 0) | |
1267 | cycled = 1; | |
1268 | else | |
1269 | cycled = 0; | |
1270 | end = -1; | |
1271 | } else { | |
1272 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1273 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1274 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1275 | range_whole = 1; | |
1276 | cycled = 1; /* ignore range_cyclic tests */ | |
1277 | } | |
1278 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1279 | tag = PAGECACHE_TAG_TOWRITE; | |
1280 | else | |
1281 | tag = PAGECACHE_TAG_DIRTY; | |
1282 | retry: | |
1283 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1284 | tag_pages_for_writeback(mapping, index, end); | |
1285 | done_index = index; | |
1286 | while (!done && (index <= end)) { | |
1287 | int i; | |
1288 | ||
1289 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1290 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1291 | if (nr_pages == 0) | |
1292 | break; | |
1293 | ||
1294 | for (i = 0; i < nr_pages; i++) { | |
1295 | struct page *page = pvec.pages[i]; | |
1296 | ||
1297 | if (page->index > end) { | |
1298 | done = 1; | |
1299 | break; | |
1300 | } | |
1301 | ||
1302 | done_index = page->index; | |
1303 | ||
1304 | lock_page(page); | |
1305 | ||
1306 | if (unlikely(page->mapping != mapping)) { | |
1307 | continue_unlock: | |
1308 | unlock_page(page); | |
1309 | continue; | |
1310 | } | |
1311 | ||
1312 | if (!PageDirty(page)) { | |
1313 | /* someone wrote it for us */ | |
1314 | goto continue_unlock; | |
1315 | } | |
1316 | ||
737f1899 | 1317 | if (step == is_cold_data(page)) |
8f46dcae CY |
1318 | goto continue_unlock; |
1319 | ||
1320 | if (PageWriteback(page)) { | |
1321 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1322 | f2fs_wait_on_page_writeback(page, |
1323 | DATA, true); | |
8f46dcae CY |
1324 | else |
1325 | goto continue_unlock; | |
1326 | } | |
1327 | ||
1328 | BUG_ON(PageWriteback(page)); | |
1329 | if (!clear_page_dirty_for_io(page)) | |
1330 | goto continue_unlock; | |
1331 | ||
1332 | ret = (*writepage)(page, wbc, data); | |
1333 | if (unlikely(ret)) { | |
1334 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1335 | unlock_page(page); | |
1336 | ret = 0; | |
1337 | } else { | |
1338 | done_index = page->index + 1; | |
1339 | done = 1; | |
1340 | break; | |
1341 | } | |
1342 | } | |
1343 | ||
1344 | if (--wbc->nr_to_write <= 0 && | |
1345 | wbc->sync_mode == WB_SYNC_NONE) { | |
1346 | done = 1; | |
1347 | break; | |
1348 | } | |
1349 | } | |
1350 | pagevec_release(&pvec); | |
1351 | cond_resched(); | |
1352 | } | |
1353 | ||
1354 | if (step < 1) { | |
1355 | step++; | |
1356 | goto next; | |
1357 | } | |
1358 | ||
1359 | if (!cycled && !done) { | |
1360 | cycled = 1; | |
1361 | index = 0; | |
1362 | end = writeback_index - 1; | |
1363 | goto retry; | |
1364 | } | |
1365 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1366 | mapping->writeback_index = done_index; | |
1367 | ||
1368 | return ret; | |
1369 | } | |
1370 | ||
25ca923b | 1371 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1372 | struct writeback_control *wbc) |
1373 | { | |
1374 | struct inode *inode = mapping->host; | |
4081363f | 1375 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1376 | bool locked = false; |
eb47b800 | 1377 | int ret; |
50c8cdb3 | 1378 | long diff; |
eb47b800 | 1379 | |
e5748434 CY |
1380 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1381 | ||
cfb185a1 | 1382 | /* deal with chardevs and other special file */ |
1383 | if (!mapping->a_ops->writepage) | |
1384 | return 0; | |
1385 | ||
6a290544 CY |
1386 | /* skip writing if there is no dirty page in this inode */ |
1387 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1388 | return 0; | |
1389 | ||
a1257023 JK |
1390 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1391 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1392 | available_free_memory(sbi, DIRTY_DENTS)) | |
1393 | goto skip_write; | |
1394 | ||
d323d005 CY |
1395 | /* skip writing during file defragment */ |
1396 | if (is_inode_flag_set(F2FS_I(inode), FI_DO_DEFRAG)) | |
1397 | goto skip_write; | |
1398 | ||
d5669f7b JK |
1399 | /* during POR, we don't need to trigger writepage at all. */ |
1400 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1401 | goto skip_write; | |
1402 | ||
50c8cdb3 | 1403 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1404 | |
25c13551 | 1405 | if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) { |
5463e7c1 JK |
1406 | mutex_lock(&sbi->writepages); |
1407 | locked = true; | |
1408 | } | |
8f46dcae | 1409 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
bb96a8d5 | 1410 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
5463e7c1 JK |
1411 | if (locked) |
1412 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1413 | |
c227f912 | 1414 | remove_dirty_inode(inode); |
eb47b800 | 1415 | |
50c8cdb3 | 1416 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1417 | return ret; |
d3baf95d JK |
1418 | |
1419 | skip_write: | |
a7ffdbe2 | 1420 | wbc->pages_skipped += get_dirty_pages(inode); |
d3baf95d | 1421 | return 0; |
eb47b800 JK |
1422 | } |
1423 | ||
3aab8f82 CY |
1424 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1425 | { | |
1426 | struct inode *inode = mapping->host; | |
819d9153 | 1427 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1428 | |
819d9153 JK |
1429 | if (to > i_size) { |
1430 | truncate_pagecache(inode, i_size); | |
1431 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1432 | } |
1433 | } | |
1434 | ||
2aadac08 JK |
1435 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1436 | struct page *page, loff_t pos, unsigned len, | |
1437 | block_t *blk_addr, bool *node_changed) | |
1438 | { | |
1439 | struct inode *inode = page->mapping->host; | |
1440 | pgoff_t index = page->index; | |
1441 | struct dnode_of_data dn; | |
1442 | struct page *ipage; | |
b4d07a3e JK |
1443 | bool locked = false; |
1444 | struct extent_info ei; | |
2aadac08 JK |
1445 | int err = 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, | |
2aadac08 | 1578 | .blk_addr = blkaddr, |
05ca3632 | 1579 | .page = page, |
4375a336 | 1580 | .encrypted_page = NULL, |
cf04e8eb | 1581 | }; |
05ca3632 | 1582 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1583 | if (err) |
1584 | goto fail; | |
d54c795b | 1585 | |
393ff91f | 1586 | lock_page(page); |
6bacf52f | 1587 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1588 | err = -EIO; |
1589 | goto fail; | |
eb47b800 | 1590 | } |
6bacf52f | 1591 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1592 | f2fs_put_page(page, 1); |
1593 | goto repeat; | |
eb47b800 | 1594 | } |
4375a336 JK |
1595 | |
1596 | /* avoid symlink page */ | |
1597 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1598 | err = f2fs_decrypt_one(inode, page); | |
86531d6b | 1599 | if (err) |
4375a336 | 1600 | goto fail; |
4375a336 | 1601 | } |
eb47b800 | 1602 | } |
90d4388a | 1603 | out_update: |
eb47b800 | 1604 | SetPageUptodate(page); |
90d4388a | 1605 | out_clear: |
eb47b800 JK |
1606 | clear_cold_data(page); |
1607 | return 0; | |
9ba69cf9 | 1608 | |
3aab8f82 | 1609 | fail: |
86531d6b | 1610 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1611 | f2fs_write_failed(mapping, pos + len); |
1612 | return err; | |
eb47b800 JK |
1613 | } |
1614 | ||
a1dd3c13 JK |
1615 | static int f2fs_write_end(struct file *file, |
1616 | struct address_space *mapping, | |
1617 | loff_t pos, unsigned len, unsigned copied, | |
1618 | struct page *page, void *fsdata) | |
1619 | { | |
1620 | struct inode *inode = page->mapping->host; | |
1621 | ||
dfb2bf38 CY |
1622 | trace_f2fs_write_end(inode, pos, len, copied); |
1623 | ||
34ba94ba | 1624 | set_page_dirty(page); |
a1dd3c13 JK |
1625 | |
1626 | if (pos + copied > i_size_read(inode)) { | |
1627 | i_size_write(inode, pos + copied); | |
1628 | mark_inode_dirty(inode); | |
a1dd3c13 JK |
1629 | } |
1630 | ||
75c3c8bc | 1631 | f2fs_put_page(page, 1); |
d0239e1b | 1632 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1633 | return copied; |
1634 | } | |
1635 | ||
6f673763 OS |
1636 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1637 | loff_t offset) | |
944fcfc1 JK |
1638 | { |
1639 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1640 | |
944fcfc1 JK |
1641 | if (offset & blocksize_mask) |
1642 | return -EINVAL; | |
1643 | ||
5b46f25d AV |
1644 | if (iov_iter_alignment(iter) & blocksize_mask) |
1645 | return -EINVAL; | |
1646 | ||
944fcfc1 JK |
1647 | return 0; |
1648 | } | |
1649 | ||
22c6186e OS |
1650 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1651 | loff_t offset) | |
eb47b800 JK |
1652 | { |
1653 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1654 | struct address_space *mapping = file->f_mapping; |
1655 | struct inode *inode = mapping->host; | |
1656 | size_t count = iov_iter_count(iter); | |
1657 | int err; | |
944fcfc1 | 1658 | |
b3d208f9 | 1659 | /* we don't need to use inline_data strictly */ |
b9d777b8 JK |
1660 | err = f2fs_convert_inline_inode(inode); |
1661 | if (err) | |
1662 | return err; | |
9ffe0fb5 | 1663 | |
fcc85a4d JK |
1664 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1665 | return 0; | |
1666 | ||
c15e8599 CY |
1667 | err = check_direct_IO(inode, iter, offset); |
1668 | if (err) | |
1669 | return err; | |
944fcfc1 | 1670 | |
6f673763 | 1671 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1672 | |
f9811703 | 1673 | if (iov_iter_rw(iter) == WRITE) { |
6d5a1495 CY |
1674 | err = __allocate_data_blocks(inode, offset, count); |
1675 | if (err) | |
f9811703 | 1676 | goto out; |
f9811703 | 1677 | } |
59b802e5 | 1678 | |
e2b4e2bc | 1679 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
f9811703 | 1680 | out: |
6f673763 | 1681 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1682 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1683 | |
6f673763 | 1684 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1685 | |
3aab8f82 | 1686 | return err; |
eb47b800 JK |
1687 | } |
1688 | ||
487261f3 CY |
1689 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1690 | unsigned int length) | |
eb47b800 JK |
1691 | { |
1692 | struct inode *inode = page->mapping->host; | |
487261f3 | 1693 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1694 | |
487261f3 CY |
1695 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1696 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1697 | return; |
1698 | ||
487261f3 CY |
1699 | if (PageDirty(page)) { |
1700 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1701 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1702 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1703 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1704 | else | |
1705 | inode_dec_dirty_pages(inode); | |
1706 | } | |
decd36b6 CY |
1707 | |
1708 | /* This is atomic written page, keep Private */ | |
1709 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1710 | return; | |
1711 | ||
eb47b800 JK |
1712 | ClearPagePrivate(page); |
1713 | } | |
1714 | ||
487261f3 | 1715 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1716 | { |
f68daeeb JK |
1717 | /* If this is dirty page, keep PagePrivate */ |
1718 | if (PageDirty(page)) | |
1719 | return 0; | |
1720 | ||
decd36b6 CY |
1721 | /* This is atomic written page, keep Private */ |
1722 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1723 | return 0; | |
1724 | ||
eb47b800 | 1725 | ClearPagePrivate(page); |
c3850aa1 | 1726 | return 1; |
eb47b800 JK |
1727 | } |
1728 | ||
1729 | static int f2fs_set_data_page_dirty(struct page *page) | |
1730 | { | |
1731 | struct address_space *mapping = page->mapping; | |
1732 | struct inode *inode = mapping->host; | |
1733 | ||
26c6b887 JK |
1734 | trace_f2fs_set_page_dirty(page, DATA); |
1735 | ||
eb47b800 | 1736 | SetPageUptodate(page); |
34ba94ba | 1737 | |
1e84371f | 1738 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1739 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1740 | register_inmem_page(inode, page); | |
1741 | return 1; | |
1742 | } | |
1743 | /* | |
1744 | * Previously, this page has been registered, we just | |
1745 | * return here. | |
1746 | */ | |
1747 | return 0; | |
34ba94ba JK |
1748 | } |
1749 | ||
eb47b800 JK |
1750 | if (!PageDirty(page)) { |
1751 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1752 | update_dirty_page(inode, page); |
eb47b800 JK |
1753 | return 1; |
1754 | } | |
1755 | return 0; | |
1756 | } | |
1757 | ||
c01e54b7 JK |
1758 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1759 | { | |
454ae7e5 CY |
1760 | struct inode *inode = mapping->host; |
1761 | ||
1d373a0e JK |
1762 | if (f2fs_has_inline_data(inode)) |
1763 | return 0; | |
1764 | ||
1765 | /* make sure allocating whole blocks */ | |
1766 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1767 | filemap_write_and_wait(mapping); | |
1768 | ||
e2b4e2bc | 1769 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1770 | } |
1771 | ||
eb47b800 JK |
1772 | const struct address_space_operations f2fs_dblock_aops = { |
1773 | .readpage = f2fs_read_data_page, | |
1774 | .readpages = f2fs_read_data_pages, | |
1775 | .writepage = f2fs_write_data_page, | |
1776 | .writepages = f2fs_write_data_pages, | |
1777 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1778 | .write_end = f2fs_write_end, |
eb47b800 | 1779 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1780 | .invalidatepage = f2fs_invalidate_page, |
1781 | .releasepage = f2fs_release_page, | |
eb47b800 | 1782 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1783 | .bmap = f2fs_bmap, |
eb47b800 | 1784 | }; |