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 | |
93dfe2ac JK |
30 | static void f2fs_read_end_io(struct bio *bio, int err) |
31 | { | |
f568849e LT |
32 | struct bio_vec *bvec; |
33 | int i; | |
93dfe2ac | 34 | |
4375a336 JK |
35 | if (f2fs_bio_encrypted(bio)) { |
36 | if (err) { | |
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 JK |
46 | |
47 | if (!err) { | |
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 | ||
93dfe2ac JK |
58 | static void f2fs_write_end_io(struct bio *bio, int err) |
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 | ||
f568849e | 69 | if (unlikely(err)) { |
cf779cab | 70 | set_page_dirty(page); |
93dfe2ac | 71 | set_bit(AS_EIO, &page->mapping->flags); |
744602cf | 72 | f2fs_stop_checkpoint(sbi); |
93dfe2ac JK |
73 | } |
74 | end_page_writeback(page); | |
75 | dec_page_count(sbi, F2FS_WRITEBACK); | |
f568849e | 76 | } |
93dfe2ac | 77 | |
93dfe2ac JK |
78 | if (!get_pages(sbi, F2FS_WRITEBACK) && |
79 | !list_empty(&sbi->cp_wait.task_list)) | |
80 | wake_up(&sbi->cp_wait); | |
81 | ||
82 | bio_put(bio); | |
83 | } | |
84 | ||
940a6d34 GZ |
85 | /* |
86 | * Low-level block read/write IO operations. | |
87 | */ | |
88 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
89 | int npages, bool is_read) | |
90 | { | |
91 | struct bio *bio; | |
92 | ||
93 | /* No failure on bio allocation */ | |
94 | bio = bio_alloc(GFP_NOIO, npages); | |
95 | ||
96 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 97 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 98 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 99 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
100 | |
101 | return bio; | |
102 | } | |
103 | ||
458e6197 | 104 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 105 | { |
458e6197 | 106 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
107 | |
108 | if (!io->bio) | |
109 | return; | |
110 | ||
6a8f8ca5 | 111 | if (is_read_io(fio->rw)) |
2ace38e0 | 112 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 113 | else |
2ace38e0 | 114 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 115 | |
6a8f8ca5 | 116 | submit_bio(fio->rw, io->bio); |
93dfe2ac JK |
117 | io->bio = NULL; |
118 | } | |
119 | ||
120 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
458e6197 | 121 | enum page_type type, int rw) |
93dfe2ac JK |
122 | { |
123 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
124 | struct f2fs_bio_info *io; | |
125 | ||
126 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
127 | ||
df0f8dc0 | 128 | down_write(&io->io_rwsem); |
458e6197 JK |
129 | |
130 | /* change META to META_FLUSH in the checkpoint procedure */ | |
131 | if (type >= META_FLUSH) { | |
132 | io->fio.type = META_FLUSH; | |
0f7b2abd JK |
133 | if (test_opt(sbi, NOBARRIER)) |
134 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
135 | else | |
136 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; | |
458e6197 JK |
137 | } |
138 | __submit_merged_bio(io); | |
df0f8dc0 | 139 | up_write(&io->io_rwsem); |
93dfe2ac JK |
140 | } |
141 | ||
142 | /* | |
143 | * Fill the locked page with data located in the block address. | |
144 | * Return unlocked page. | |
145 | */ | |
05ca3632 | 146 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 147 | { |
93dfe2ac | 148 | struct bio *bio; |
4375a336 | 149 | struct page *page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
93dfe2ac | 150 | |
2ace38e0 | 151 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 152 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
153 | |
154 | /* Allocate a new bio */ | |
05ca3632 | 155 | bio = __bio_alloc(fio->sbi, fio->blk_addr, 1, is_read_io(fio->rw)); |
93dfe2ac JK |
156 | |
157 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
158 | bio_put(bio); | |
159 | f2fs_put_page(page, 1); | |
160 | return -EFAULT; | |
161 | } | |
162 | ||
cf04e8eb | 163 | submit_bio(fio->rw, bio); |
93dfe2ac JK |
164 | return 0; |
165 | } | |
166 | ||
05ca3632 | 167 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 168 | { |
05ca3632 | 169 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 170 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 171 | struct f2fs_bio_info *io; |
940a6d34 | 172 | bool is_read = is_read_io(fio->rw); |
4375a336 | 173 | struct page *bio_page; |
93dfe2ac | 174 | |
940a6d34 | 175 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 176 | |
cf04e8eb | 177 | verify_block_addr(sbi, fio->blk_addr); |
93dfe2ac | 178 | |
df0f8dc0 | 179 | down_write(&io->io_rwsem); |
93dfe2ac | 180 | |
940a6d34 | 181 | if (!is_read) |
93dfe2ac JK |
182 | inc_page_count(sbi, F2FS_WRITEBACK); |
183 | ||
cf04e8eb | 184 | if (io->bio && (io->last_block_in_bio != fio->blk_addr - 1 || |
458e6197 JK |
185 | io->fio.rw != fio->rw)) |
186 | __submit_merged_bio(io); | |
93dfe2ac JK |
187 | alloc_new: |
188 | if (io->bio == NULL) { | |
90a893c7 | 189 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 190 | |
cf04e8eb | 191 | io->bio = __bio_alloc(sbi, fio->blk_addr, bio_blocks, is_read); |
458e6197 | 192 | io->fio = *fio; |
93dfe2ac JK |
193 | } |
194 | ||
4375a336 JK |
195 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
196 | ||
197 | if (bio_add_page(io->bio, bio_page, PAGE_CACHE_SIZE, 0) < | |
93dfe2ac | 198 | PAGE_CACHE_SIZE) { |
458e6197 | 199 | __submit_merged_bio(io); |
93dfe2ac JK |
200 | goto alloc_new; |
201 | } | |
202 | ||
cf04e8eb | 203 | io->last_block_in_bio = fio->blk_addr; |
05ca3632 | 204 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 205 | |
df0f8dc0 | 206 | up_write(&io->io_rwsem); |
05ca3632 | 207 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
208 | } |
209 | ||
0a8165d7 | 210 | /* |
eb47b800 JK |
211 | * Lock ordering for the change of data block address: |
212 | * ->data_page | |
213 | * ->node_page | |
214 | * update block addresses in the node page | |
215 | */ | |
216a620a | 216 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 JK |
217 | { |
218 | struct f2fs_node *rn; | |
219 | __le32 *addr_array; | |
220 | struct page *node_page = dn->node_page; | |
221 | unsigned int ofs_in_node = dn->ofs_in_node; | |
222 | ||
5514f0aa | 223 | f2fs_wait_on_page_writeback(node_page, NODE); |
eb47b800 | 224 | |
45590710 | 225 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
226 | |
227 | /* Get physical address of data block */ | |
228 | addr_array = blkaddr_in_node(rn); | |
e1509cf2 | 229 | addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
eb47b800 JK |
230 | set_page_dirty(node_page); |
231 | } | |
232 | ||
233 | int reserve_new_block(struct dnode_of_data *dn) | |
234 | { | |
4081363f | 235 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 236 | |
6bacf52f | 237 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 238 | return -EPERM; |
cfb271d4 | 239 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
240 | return -ENOSPC; |
241 | ||
c01e2853 NJ |
242 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
243 | ||
eb47b800 | 244 | dn->data_blkaddr = NEW_ADDR; |
216a620a | 245 | set_data_blkaddr(dn); |
a18ff063 | 246 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
247 | sync_inode_page(dn); |
248 | return 0; | |
249 | } | |
250 | ||
b600965c HL |
251 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
252 | { | |
253 | bool need_put = dn->inode_page ? false : true; | |
254 | int err; | |
255 | ||
256 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
257 | if (err) | |
258 | return err; | |
a8865372 | 259 | |
b600965c HL |
260 | if (dn->data_blkaddr == NULL_ADDR) |
261 | err = reserve_new_block(dn); | |
a8865372 | 262 | if (err || need_put) |
b600965c HL |
263 | f2fs_put_dnode(dn); |
264 | return err; | |
265 | } | |
266 | ||
43f3eae1 | 267 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, int rw) |
eb47b800 | 268 | { |
eb47b800 JK |
269 | struct address_space *mapping = inode->i_mapping; |
270 | struct dnode_of_data dn; | |
271 | struct page *page; | |
cb3bc9ee | 272 | struct extent_info ei; |
eb47b800 | 273 | int err; |
cf04e8eb | 274 | struct f2fs_io_info fio = { |
05ca3632 | 275 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 276 | .type = DATA, |
43f3eae1 | 277 | .rw = rw, |
4375a336 | 278 | .encrypted_page = NULL, |
cf04e8eb | 279 | }; |
eb47b800 | 280 | |
4375a336 JK |
281 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
282 | return read_mapping_page(mapping, index, NULL); | |
283 | ||
9ac1349a | 284 | page = grab_cache_page(mapping, index); |
650495de JK |
285 | if (!page) |
286 | return ERR_PTR(-ENOMEM); | |
287 | ||
cb3bc9ee CY |
288 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
289 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
290 | goto got_it; | |
291 | } | |
292 | ||
eb47b800 | 293 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 294 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
650495de JK |
295 | if (err) { |
296 | f2fs_put_page(page, 1); | |
eb47b800 | 297 | return ERR_PTR(err); |
650495de | 298 | } |
eb47b800 JK |
299 | f2fs_put_dnode(&dn); |
300 | ||
6bacf52f | 301 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
650495de | 302 | f2fs_put_page(page, 1); |
eb47b800 | 303 | return ERR_PTR(-ENOENT); |
650495de | 304 | } |
cb3bc9ee | 305 | got_it: |
43f3eae1 JK |
306 | if (PageUptodate(page)) { |
307 | unlock_page(page); | |
eb47b800 | 308 | return page; |
43f3eae1 | 309 | } |
eb47b800 | 310 | |
d59ff4df JK |
311 | /* |
312 | * A new dentry page is allocated but not able to be written, since its | |
313 | * new inode page couldn't be allocated due to -ENOSPC. | |
314 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
315 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
316 | */ | |
317 | if (dn.data_blkaddr == NEW_ADDR) { | |
318 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
319 | SetPageUptodate(page); | |
43f3eae1 | 320 | unlock_page(page); |
d59ff4df JK |
321 | return page; |
322 | } | |
eb47b800 | 323 | |
cf04e8eb | 324 | fio.blk_addr = dn.data_blkaddr; |
05ca3632 JK |
325 | fio.page = page; |
326 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 327 | if (err) |
eb47b800 | 328 | return ERR_PTR(err); |
43f3eae1 JK |
329 | return page; |
330 | } | |
331 | ||
332 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
333 | { | |
334 | struct address_space *mapping = inode->i_mapping; | |
335 | struct page *page; | |
336 | ||
337 | page = find_get_page(mapping, index); | |
338 | if (page && PageUptodate(page)) | |
339 | return page; | |
340 | f2fs_put_page(page, 0); | |
341 | ||
342 | page = get_read_data_page(inode, index, READ_SYNC); | |
343 | if (IS_ERR(page)) | |
344 | return page; | |
345 | ||
346 | if (PageUptodate(page)) | |
347 | return page; | |
348 | ||
349 | wait_on_page_locked(page); | |
350 | if (unlikely(!PageUptodate(page))) { | |
351 | f2fs_put_page(page, 0); | |
352 | return ERR_PTR(-EIO); | |
353 | } | |
354 | return page; | |
355 | } | |
356 | ||
357 | /* | |
358 | * If it tries to access a hole, return an error. | |
359 | * Because, the callers, functions in dir.c and GC, should be able to know | |
360 | * whether this page exists or not. | |
361 | */ | |
362 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index) | |
363 | { | |
364 | struct address_space *mapping = inode->i_mapping; | |
365 | struct page *page; | |
366 | repeat: | |
367 | page = get_read_data_page(inode, index, READ_SYNC); | |
368 | if (IS_ERR(page)) | |
369 | return page; | |
393ff91f | 370 | |
43f3eae1 | 371 | /* wait for read completion */ |
393ff91f | 372 | lock_page(page); |
6bacf52f | 373 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
374 | f2fs_put_page(page, 1); |
375 | return ERR_PTR(-EIO); | |
eb47b800 | 376 | } |
6bacf52f | 377 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
378 | f2fs_put_page(page, 1); |
379 | goto repeat; | |
eb47b800 JK |
380 | } |
381 | return page; | |
382 | } | |
383 | ||
0a8165d7 | 384 | /* |
eb47b800 JK |
385 | * Caller ensures that this data page is never allocated. |
386 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 387 | * |
4f4124d0 CY |
388 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
389 | * f2fs_unlock_op(). | |
a8865372 | 390 | * Note that, ipage is set only by make_empty_dir. |
eb47b800 | 391 | */ |
64aa7ed9 | 392 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 393 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 394 | { |
eb47b800 JK |
395 | struct address_space *mapping = inode->i_mapping; |
396 | struct page *page; | |
397 | struct dnode_of_data dn; | |
398 | int err; | |
01f28610 JK |
399 | repeat: |
400 | page = grab_cache_page(mapping, index); | |
401 | if (!page) | |
402 | return ERR_PTR(-ENOMEM); | |
eb47b800 | 403 | |
a8865372 | 404 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 405 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
406 | if (err) { |
407 | f2fs_put_page(page, 1); | |
eb47b800 | 408 | return ERR_PTR(err); |
a8865372 | 409 | } |
01f28610 JK |
410 | if (!ipage) |
411 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
412 | |
413 | if (PageUptodate(page)) | |
01f28610 | 414 | goto got_it; |
eb47b800 JK |
415 | |
416 | if (dn.data_blkaddr == NEW_ADDR) { | |
417 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 418 | SetPageUptodate(page); |
eb47b800 | 419 | } else { |
4375a336 | 420 | f2fs_put_page(page, 1); |
a8865372 | 421 | |
4375a336 JK |
422 | page = get_read_data_page(inode, index, READ_SYNC); |
423 | if (IS_ERR(page)) | |
afcb7ca0 | 424 | goto repeat; |
4375a336 JK |
425 | |
426 | /* wait for read completion */ | |
427 | lock_page(page); | |
eb47b800 | 428 | } |
01f28610 | 429 | got_it: |
eb47b800 JK |
430 | if (new_i_size && |
431 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
432 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
433 | /* Only the directory inode sets new_i_size */ |
434 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
435 | } |
436 | return page; | |
437 | } | |
438 | ||
bfad7c2d JK |
439 | static int __allocate_data_block(struct dnode_of_data *dn) |
440 | { | |
4081363f | 441 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
976e4c50 | 442 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); |
bfad7c2d | 443 | struct f2fs_summary sum; |
bfad7c2d | 444 | struct node_info ni; |
38aa0889 | 445 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 446 | pgoff_t fofs; |
bfad7c2d JK |
447 | |
448 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
449 | return -EPERM; | |
df6136ef CY |
450 | |
451 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
452 | if (dn->data_blkaddr == NEW_ADDR) | |
453 | goto alloc; | |
454 | ||
bfad7c2d JK |
455 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
456 | return -ENOSPC; | |
457 | ||
df6136ef | 458 | alloc: |
bfad7c2d JK |
459 | get_node_info(sbi, dn->nid, &ni); |
460 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
461 | ||
38aa0889 JK |
462 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
463 | seg = CURSEG_DIRECT_IO; | |
464 | ||
df6136ef CY |
465 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
466 | &sum, seg); | |
216a620a | 467 | set_data_blkaddr(dn); |
bfad7c2d | 468 | |
976e4c50 JK |
469 | /* update i_size */ |
470 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + | |
471 | dn->ofs_in_node; | |
472 | if (i_size_read(dn->inode) < ((fofs + 1) << PAGE_CACHE_SHIFT)) | |
473 | i_size_write(dn->inode, ((fofs + 1) << PAGE_CACHE_SHIFT)); | |
474 | ||
3e72f721 | 475 | /* direct IO doesn't use extent cache to maximize the performance */ |
a28ef1f5 | 476 | f2fs_drop_largest_extent(dn->inode, fofs); |
3e72f721 | 477 | |
bfad7c2d JK |
478 | return 0; |
479 | } | |
480 | ||
59b802e5 JK |
481 | static void __allocate_data_blocks(struct inode *inode, loff_t offset, |
482 | size_t count) | |
483 | { | |
484 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
485 | struct dnode_of_data dn; | |
486 | u64 start = F2FS_BYTES_TO_BLK(offset); | |
487 | u64 len = F2FS_BYTES_TO_BLK(count); | |
488 | bool allocated; | |
489 | u64 end_offset; | |
490 | ||
491 | while (len) { | |
492 | f2fs_balance_fs(sbi); | |
493 | f2fs_lock_op(sbi); | |
494 | ||
495 | /* When reading holes, we need its node page */ | |
496 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
497 | if (get_dnode_of_data(&dn, start, ALLOC_NODE)) | |
498 | goto out; | |
499 | ||
500 | allocated = false; | |
501 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); | |
502 | ||
503 | while (dn.ofs_in_node < end_offset && len) { | |
d6d4f1cb CY |
504 | block_t blkaddr; |
505 | ||
506 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
df6136ef | 507 | if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) { |
59b802e5 JK |
508 | if (__allocate_data_block(&dn)) |
509 | goto sync_out; | |
510 | allocated = true; | |
511 | } | |
512 | len--; | |
513 | start++; | |
514 | dn.ofs_in_node++; | |
515 | } | |
516 | ||
517 | if (allocated) | |
518 | sync_inode_page(&dn); | |
519 | ||
520 | f2fs_put_dnode(&dn); | |
521 | f2fs_unlock_op(sbi); | |
522 | } | |
523 | return; | |
524 | ||
525 | sync_out: | |
526 | if (allocated) | |
527 | sync_inode_page(&dn); | |
528 | f2fs_put_dnode(&dn); | |
529 | out: | |
530 | f2fs_unlock_op(sbi); | |
531 | return; | |
532 | } | |
533 | ||
0a8165d7 | 534 | /* |
003a3e1d JK |
535 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
536 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
537 | * If original data blocks are allocated, then give them to blockdev. |
538 | * Otherwise, | |
539 | * a. preallocate requested block addresses | |
540 | * b. do not use extent cache for better performance | |
541 | * c. give the block addresses to blockdev | |
eb47b800 | 542 | */ |
003a3e1d JK |
543 | static int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
544 | int create, bool fiemap) | |
eb47b800 | 545 | { |
003a3e1d | 546 | unsigned int maxblocks = map->m_len; |
eb47b800 | 547 | struct dnode_of_data dn; |
bfad7c2d JK |
548 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
549 | pgoff_t pgofs, end_offset; | |
550 | int err = 0, ofs = 1; | |
a2e7d1bf | 551 | struct extent_info ei; |
bfad7c2d | 552 | bool allocated = false; |
eb47b800 | 553 | |
003a3e1d JK |
554 | map->m_len = 0; |
555 | map->m_flags = 0; | |
556 | ||
557 | /* it only supports block size == page size */ | |
558 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 559 | |
7e4dde79 | 560 | if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
561 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
562 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
563 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 564 | goto out; |
a2e7d1bf | 565 | } |
bfad7c2d | 566 | |
59b802e5 | 567 | if (create) |
4081363f | 568 | f2fs_lock_op(F2FS_I_SB(inode)); |
eb47b800 JK |
569 | |
570 | /* When reading holes, we need its node page */ | |
571 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 572 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 573 | if (err) { |
bfad7c2d JK |
574 | if (err == -ENOENT) |
575 | err = 0; | |
576 | goto unlock_out; | |
848753aa | 577 | } |
ccfb3000 | 578 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 | 579 | goto put_out; |
eb47b800 | 580 | |
bfad7c2d | 581 | if (dn.data_blkaddr != NULL_ADDR) { |
003a3e1d JK |
582 | map->m_flags = F2FS_MAP_MAPPED; |
583 | map->m_pblk = dn.data_blkaddr; | |
7f63eb77 JK |
584 | if (dn.data_blkaddr == NEW_ADDR) |
585 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
bfad7c2d JK |
586 | } else if (create) { |
587 | err = __allocate_data_block(&dn); | |
588 | if (err) | |
589 | goto put_out; | |
590 | allocated = true; | |
003a3e1d JK |
591 | map->m_flags = F2FS_MAP_NEW | F2FS_MAP_MAPPED; |
592 | map->m_pblk = dn.data_blkaddr; | |
bfad7c2d JK |
593 | } else { |
594 | goto put_out; | |
595 | } | |
596 | ||
6403eb1f | 597 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
003a3e1d | 598 | map->m_len = 1; |
bfad7c2d JK |
599 | dn.ofs_in_node++; |
600 | pgofs++; | |
601 | ||
602 | get_next: | |
603 | if (dn.ofs_in_node >= end_offset) { | |
604 | if (allocated) | |
605 | sync_inode_page(&dn); | |
606 | allocated = false; | |
607 | f2fs_put_dnode(&dn); | |
608 | ||
609 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
610 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 611 | if (err) { |
bfad7c2d JK |
612 | if (err == -ENOENT) |
613 | err = 0; | |
614 | goto unlock_out; | |
615 | } | |
ccfb3000 | 616 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 JK |
617 | goto put_out; |
618 | ||
6403eb1f | 619 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 620 | } |
eb47b800 | 621 | |
003a3e1d | 622 | if (maxblocks > map->m_len) { |
bfad7c2d JK |
623 | block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
624 | if (blkaddr == NULL_ADDR && create) { | |
625 | err = __allocate_data_block(&dn); | |
626 | if (err) | |
627 | goto sync_out; | |
628 | allocated = true; | |
003a3e1d | 629 | map->m_flags |= F2FS_MAP_NEW; |
bfad7c2d JK |
630 | blkaddr = dn.data_blkaddr; |
631 | } | |
e1c42045 | 632 | /* Give more consecutive addresses for the readahead */ |
7f63eb77 JK |
633 | if ((map->m_pblk != NEW_ADDR && |
634 | blkaddr == (map->m_pblk + ofs)) || | |
635 | (map->m_pblk == NEW_ADDR && | |
636 | blkaddr == NEW_ADDR)) { | |
bfad7c2d JK |
637 | ofs++; |
638 | dn.ofs_in_node++; | |
639 | pgofs++; | |
003a3e1d | 640 | map->m_len++; |
bfad7c2d JK |
641 | goto get_next; |
642 | } | |
eb47b800 | 643 | } |
bfad7c2d JK |
644 | sync_out: |
645 | if (allocated) | |
646 | sync_inode_page(&dn); | |
647 | put_out: | |
eb47b800 | 648 | f2fs_put_dnode(&dn); |
bfad7c2d JK |
649 | unlock_out: |
650 | if (create) | |
4081363f | 651 | f2fs_unlock_op(F2FS_I_SB(inode)); |
bfad7c2d | 652 | out: |
003a3e1d | 653 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 654 | return err; |
eb47b800 JK |
655 | } |
656 | ||
003a3e1d JK |
657 | static int __get_data_block(struct inode *inode, sector_t iblock, |
658 | struct buffer_head *bh, int create, bool fiemap) | |
659 | { | |
660 | struct f2fs_map_blocks map; | |
661 | int ret; | |
662 | ||
663 | map.m_lblk = iblock; | |
664 | map.m_len = bh->b_size >> inode->i_blkbits; | |
665 | ||
666 | ret = f2fs_map_blocks(inode, &map, create, fiemap); | |
667 | if (!ret) { | |
668 | map_bh(bh, inode->i_sb, map.m_pblk); | |
669 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
670 | bh->b_size = map.m_len << inode->i_blkbits; | |
671 | } | |
672 | return ret; | |
673 | } | |
674 | ||
ccfb3000 JK |
675 | static int get_data_block(struct inode *inode, sector_t iblock, |
676 | struct buffer_head *bh_result, int create) | |
677 | { | |
678 | return __get_data_block(inode, iblock, bh_result, create, false); | |
679 | } | |
680 | ||
681 | static int get_data_block_fiemap(struct inode *inode, sector_t iblock, | |
682 | struct buffer_head *bh_result, int create) | |
683 | { | |
684 | return __get_data_block(inode, iblock, bh_result, create, true); | |
685 | } | |
686 | ||
7f63eb77 JK |
687 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
688 | { | |
689 | return (offset >> inode->i_blkbits); | |
690 | } | |
691 | ||
692 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
693 | { | |
694 | return (blk << inode->i_blkbits); | |
695 | } | |
696 | ||
9ab70134 JK |
697 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
698 | u64 start, u64 len) | |
699 | { | |
7f63eb77 JK |
700 | struct buffer_head map_bh; |
701 | sector_t start_blk, last_blk; | |
702 | loff_t isize = i_size_read(inode); | |
703 | u64 logical = 0, phys = 0, size = 0; | |
704 | u32 flags = 0; | |
705 | bool past_eof = false, whole_file = false; | |
706 | int ret = 0; | |
707 | ||
708 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
709 | if (ret) | |
710 | return ret; | |
711 | ||
712 | mutex_lock(&inode->i_mutex); | |
713 | ||
714 | if (len >= isize) { | |
715 | whole_file = true; | |
716 | len = isize; | |
717 | } | |
718 | ||
719 | if (logical_to_blk(inode, len) == 0) | |
720 | len = blk_to_logical(inode, 1); | |
721 | ||
722 | start_blk = logical_to_blk(inode, start); | |
723 | last_blk = logical_to_blk(inode, start + len - 1); | |
724 | next: | |
725 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
726 | map_bh.b_size = len; | |
727 | ||
728 | ret = get_data_block_fiemap(inode, start_blk, &map_bh, 0); | |
729 | if (ret) | |
730 | goto out; | |
731 | ||
732 | /* HOLE */ | |
733 | if (!buffer_mapped(&map_bh)) { | |
734 | start_blk++; | |
735 | ||
736 | if (!past_eof && blk_to_logical(inode, start_blk) >= isize) | |
737 | past_eof = 1; | |
738 | ||
739 | if (past_eof && size) { | |
740 | flags |= FIEMAP_EXTENT_LAST; | |
741 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
742 | phys, size, flags); | |
743 | } else if (size) { | |
744 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
745 | phys, size, flags); | |
746 | size = 0; | |
747 | } | |
748 | ||
749 | /* if we have holes up to/past EOF then we're done */ | |
750 | if (start_blk > last_blk || past_eof || ret) | |
751 | goto out; | |
752 | } else { | |
753 | if (start_blk > last_blk && !whole_file) { | |
754 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
755 | phys, size, flags); | |
756 | goto out; | |
757 | } | |
758 | ||
759 | /* | |
760 | * if size != 0 then we know we already have an extent | |
761 | * to add, so add it. | |
762 | */ | |
763 | if (size) { | |
764 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
765 | phys, size, flags); | |
766 | if (ret) | |
767 | goto out; | |
768 | } | |
769 | ||
770 | logical = blk_to_logical(inode, start_blk); | |
771 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
772 | size = map_bh.b_size; | |
773 | flags = 0; | |
774 | if (buffer_unwritten(&map_bh)) | |
775 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
776 | ||
777 | start_blk += logical_to_blk(inode, size); | |
778 | ||
779 | /* | |
780 | * If we are past the EOF, then we need to make sure as | |
781 | * soon as we find a hole that the last extent we found | |
782 | * is marked with FIEMAP_EXTENT_LAST | |
783 | */ | |
784 | if (!past_eof && logical + size >= isize) | |
785 | past_eof = true; | |
786 | } | |
787 | cond_resched(); | |
788 | if (fatal_signal_pending(current)) | |
789 | ret = -EINTR; | |
790 | else | |
791 | goto next; | |
792 | out: | |
793 | if (ret == 1) | |
794 | ret = 0; | |
795 | ||
796 | mutex_unlock(&inode->i_mutex); | |
797 | return ret; | |
9ab70134 JK |
798 | } |
799 | ||
f1e88660 JK |
800 | /* |
801 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
802 | * Major change was from block_size == page_size in f2fs by default. | |
803 | */ | |
804 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
805 | struct list_head *pages, struct page *page, | |
806 | unsigned nr_pages) | |
807 | { | |
808 | struct bio *bio = NULL; | |
809 | unsigned page_idx; | |
810 | sector_t last_block_in_bio = 0; | |
811 | struct inode *inode = mapping->host; | |
812 | const unsigned blkbits = inode->i_blkbits; | |
813 | const unsigned blocksize = 1 << blkbits; | |
814 | sector_t block_in_file; | |
815 | sector_t last_block; | |
816 | sector_t last_block_in_file; | |
817 | sector_t block_nr; | |
818 | struct block_device *bdev = inode->i_sb->s_bdev; | |
819 | struct f2fs_map_blocks map; | |
820 | ||
821 | map.m_pblk = 0; | |
822 | map.m_lblk = 0; | |
823 | map.m_len = 0; | |
824 | map.m_flags = 0; | |
825 | ||
826 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
827 | ||
828 | prefetchw(&page->flags); | |
829 | if (pages) { | |
830 | page = list_entry(pages->prev, struct page, lru); | |
831 | list_del(&page->lru); | |
832 | if (add_to_page_cache_lru(page, mapping, | |
833 | page->index, GFP_KERNEL)) | |
834 | goto next_page; | |
835 | } | |
836 | ||
837 | block_in_file = (sector_t)page->index; | |
838 | last_block = block_in_file + nr_pages; | |
839 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
840 | blkbits; | |
841 | if (last_block > last_block_in_file) | |
842 | last_block = last_block_in_file; | |
843 | ||
844 | /* | |
845 | * Map blocks using the previous result first. | |
846 | */ | |
847 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
848 | block_in_file > map.m_lblk && | |
849 | block_in_file < (map.m_lblk + map.m_len)) | |
850 | goto got_it; | |
851 | ||
852 | /* | |
853 | * Then do more f2fs_map_blocks() calls until we are | |
854 | * done with this page. | |
855 | */ | |
856 | map.m_flags = 0; | |
857 | ||
858 | if (block_in_file < last_block) { | |
859 | map.m_lblk = block_in_file; | |
860 | map.m_len = last_block - block_in_file; | |
861 | ||
862 | if (f2fs_map_blocks(inode, &map, 0, false)) | |
863 | goto set_error_page; | |
864 | } | |
865 | got_it: | |
866 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
867 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
868 | SetPageMappedToDisk(page); | |
869 | ||
870 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
871 | SetPageUptodate(page); | |
872 | goto confused; | |
873 | } | |
874 | } else { | |
875 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
876 | SetPageUptodate(page); | |
877 | unlock_page(page); | |
878 | goto next_page; | |
879 | } | |
880 | ||
881 | /* | |
882 | * This page will go to BIO. Do we need to send this | |
883 | * BIO off first? | |
884 | */ | |
885 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
886 | submit_and_realloc: | |
887 | submit_bio(READ, bio); | |
888 | bio = NULL; | |
889 | } | |
890 | if (bio == NULL) { | |
4375a336 JK |
891 | struct f2fs_crypto_ctx *ctx = NULL; |
892 | ||
893 | if (f2fs_encrypted_inode(inode) && | |
894 | S_ISREG(inode->i_mode)) { | |
895 | struct page *cpage; | |
896 | ||
897 | ctx = f2fs_get_crypto_ctx(inode); | |
898 | if (IS_ERR(ctx)) | |
899 | goto set_error_page; | |
900 | ||
901 | /* wait the page to be moved by cleaning */ | |
902 | cpage = find_lock_page( | |
903 | META_MAPPING(F2FS_I_SB(inode)), | |
904 | block_nr); | |
905 | if (cpage) { | |
906 | f2fs_wait_on_page_writeback(cpage, | |
907 | DATA); | |
908 | f2fs_put_page(cpage, 1); | |
909 | } | |
910 | } | |
911 | ||
f1e88660 JK |
912 | bio = bio_alloc(GFP_KERNEL, |
913 | min_t(int, nr_pages, bio_get_nr_vecs(bdev))); | |
4375a336 JK |
914 | if (!bio) { |
915 | if (ctx) | |
916 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 917 | goto set_error_page; |
4375a336 | 918 | } |
f1e88660 JK |
919 | bio->bi_bdev = bdev; |
920 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 921 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 922 | bio->bi_private = ctx; |
f1e88660 JK |
923 | } |
924 | ||
925 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
926 | goto submit_and_realloc; | |
927 | ||
928 | last_block_in_bio = block_nr; | |
929 | goto next_page; | |
930 | set_error_page: | |
931 | SetPageError(page); | |
932 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
933 | unlock_page(page); | |
934 | goto next_page; | |
935 | confused: | |
936 | if (bio) { | |
937 | submit_bio(READ, bio); | |
938 | bio = NULL; | |
939 | } | |
940 | unlock_page(page); | |
941 | next_page: | |
942 | if (pages) | |
943 | page_cache_release(page); | |
944 | } | |
945 | BUG_ON(pages && !list_empty(pages)); | |
946 | if (bio) | |
947 | submit_bio(READ, bio); | |
948 | return 0; | |
949 | } | |
950 | ||
eb47b800 JK |
951 | static int f2fs_read_data_page(struct file *file, struct page *page) |
952 | { | |
9ffe0fb5 | 953 | struct inode *inode = page->mapping->host; |
b3d208f9 | 954 | int ret = -EAGAIN; |
9ffe0fb5 | 955 | |
c20e89cd CY |
956 | trace_f2fs_readpage(page, DATA); |
957 | ||
e1c42045 | 958 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
959 | if (f2fs_has_inline_data(inode)) |
960 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 961 | if (ret == -EAGAIN) |
f1e88660 | 962 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 963 | return ret; |
eb47b800 JK |
964 | } |
965 | ||
966 | static int f2fs_read_data_pages(struct file *file, | |
967 | struct address_space *mapping, | |
968 | struct list_head *pages, unsigned nr_pages) | |
969 | { | |
9ffe0fb5 HL |
970 | struct inode *inode = file->f_mapping->host; |
971 | ||
972 | /* If the file has inline data, skip readpages */ | |
973 | if (f2fs_has_inline_data(inode)) | |
974 | return 0; | |
975 | ||
f1e88660 | 976 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
977 | } |
978 | ||
05ca3632 | 979 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 980 | { |
05ca3632 | 981 | struct page *page = fio->page; |
eb47b800 | 982 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
983 | struct dnode_of_data dn; |
984 | int err = 0; | |
985 | ||
986 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 987 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
988 | if (err) |
989 | return err; | |
990 | ||
cf04e8eb | 991 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
992 | |
993 | /* This page is already truncated */ | |
2bca1e23 JK |
994 | if (fio->blk_addr == NULL_ADDR) { |
995 | ClearPageUptodate(page); | |
eb47b800 | 996 | goto out_writepage; |
2bca1e23 | 997 | } |
eb47b800 | 998 | |
4375a336 JK |
999 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
1000 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); | |
1001 | if (IS_ERR(fio->encrypted_page)) { | |
1002 | err = PTR_ERR(fio->encrypted_page); | |
1003 | goto out_writepage; | |
1004 | } | |
1005 | } | |
1006 | ||
eb47b800 JK |
1007 | set_page_writeback(page); |
1008 | ||
1009 | /* | |
1010 | * If current allocation needs SSR, | |
1011 | * it had better in-place writes for updated data. | |
1012 | */ | |
cf04e8eb | 1013 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 HL |
1014 | !is_cold_data(page) && |
1015 | need_inplace_update(inode))) { | |
05ca3632 | 1016 | rewrite_data_page(fio); |
fff04f90 | 1017 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1018 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1019 | } else { |
05ca3632 | 1020 | write_data_page(&dn, fio); |
216a620a | 1021 | set_data_blkaddr(&dn); |
7e4dde79 | 1022 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1023 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1024 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1025 | if (page->index == 0) |
1026 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1027 | } |
1028 | out_writepage: | |
1029 | f2fs_put_dnode(&dn); | |
1030 | return err; | |
1031 | } | |
1032 | ||
1033 | static int f2fs_write_data_page(struct page *page, | |
1034 | struct writeback_control *wbc) | |
1035 | { | |
1036 | struct inode *inode = page->mapping->host; | |
4081363f | 1037 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1038 | loff_t i_size = i_size_read(inode); |
1039 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1040 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1041 | unsigned offset = 0; |
39936837 | 1042 | bool need_balance_fs = false; |
eb47b800 | 1043 | int err = 0; |
458e6197 | 1044 | struct f2fs_io_info fio = { |
05ca3632 | 1045 | .sbi = sbi, |
458e6197 | 1046 | .type = DATA, |
6c311ec6 | 1047 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1048 | .page = page, |
4375a336 | 1049 | .encrypted_page = NULL, |
458e6197 | 1050 | }; |
eb47b800 | 1051 | |
ecda0de3 CY |
1052 | trace_f2fs_writepage(page, DATA); |
1053 | ||
eb47b800 | 1054 | if (page->index < end_index) |
39936837 | 1055 | goto write; |
eb47b800 JK |
1056 | |
1057 | /* | |
1058 | * If the offset is out-of-range of file size, | |
1059 | * this page does not have to be written to disk. | |
1060 | */ | |
1061 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1062 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1063 | goto out; |
eb47b800 JK |
1064 | |
1065 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1066 | write: |
caf0047e | 1067 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1068 | goto redirty_out; |
1e84371f JK |
1069 | if (f2fs_is_drop_cache(inode)) |
1070 | goto out; | |
1071 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1072 | available_free_memory(sbi, BASE_CHECK)) | |
1073 | goto redirty_out; | |
eb47b800 | 1074 | |
39936837 | 1075 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1076 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1077 | if (unlikely(f2fs_cp_error(sbi))) |
1078 | goto redirty_out; | |
05ca3632 | 1079 | err = do_write_data_page(&fio); |
8618b881 JK |
1080 | goto done; |
1081 | } | |
9ffe0fb5 | 1082 | |
cf779cab JK |
1083 | /* we should bypass data pages to proceed the kworkder jobs */ |
1084 | if (unlikely(f2fs_cp_error(sbi))) { | |
1085 | SetPageError(page); | |
a7ffdbe2 | 1086 | goto out; |
cf779cab JK |
1087 | } |
1088 | ||
8618b881 | 1089 | if (!wbc->for_reclaim) |
39936837 | 1090 | need_balance_fs = true; |
8618b881 | 1091 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1092 | goto redirty_out; |
eb47b800 | 1093 | |
b3d208f9 | 1094 | err = -EAGAIN; |
8618b881 | 1095 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1096 | if (f2fs_has_inline_data(inode)) |
1097 | err = f2fs_write_inline_data(inode, page); | |
1098 | if (err == -EAGAIN) | |
05ca3632 | 1099 | err = do_write_data_page(&fio); |
8618b881 JK |
1100 | f2fs_unlock_op(sbi); |
1101 | done: | |
1102 | if (err && err != -ENOENT) | |
1103 | goto redirty_out; | |
eb47b800 | 1104 | |
eb47b800 | 1105 | clear_cold_data(page); |
39936837 | 1106 | out: |
a7ffdbe2 | 1107 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1108 | if (err) |
1109 | ClearPageUptodate(page); | |
eb47b800 | 1110 | unlock_page(page); |
39936837 | 1111 | if (need_balance_fs) |
eb47b800 | 1112 | f2fs_balance_fs(sbi); |
2aea39ec JK |
1113 | if (wbc->for_reclaim) |
1114 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
1115 | return 0; |
1116 | ||
eb47b800 | 1117 | redirty_out: |
76f60268 | 1118 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1119 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1120 | } |
1121 | ||
fa9150a8 NJ |
1122 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1123 | void *data) | |
1124 | { | |
1125 | struct address_space *mapping = data; | |
1126 | int ret = mapping->a_ops->writepage(page, wbc); | |
1127 | mapping_set_error(mapping, ret); | |
1128 | return ret; | |
1129 | } | |
1130 | ||
8f46dcae CY |
1131 | /* |
1132 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1133 | * The major change is making write step of cold data page separately from | |
1134 | * warm/hot data page. | |
1135 | */ | |
1136 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1137 | struct writeback_control *wbc, writepage_t writepage, | |
1138 | void *data) | |
1139 | { | |
1140 | int ret = 0; | |
1141 | int done = 0; | |
1142 | struct pagevec pvec; | |
1143 | int nr_pages; | |
1144 | pgoff_t uninitialized_var(writeback_index); | |
1145 | pgoff_t index; | |
1146 | pgoff_t end; /* Inclusive */ | |
1147 | pgoff_t done_index; | |
1148 | int cycled; | |
1149 | int range_whole = 0; | |
1150 | int tag; | |
1151 | int step = 0; | |
1152 | ||
1153 | pagevec_init(&pvec, 0); | |
1154 | next: | |
1155 | if (wbc->range_cyclic) { | |
1156 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1157 | index = writeback_index; | |
1158 | if (index == 0) | |
1159 | cycled = 1; | |
1160 | else | |
1161 | cycled = 0; | |
1162 | end = -1; | |
1163 | } else { | |
1164 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1165 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1166 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1167 | range_whole = 1; | |
1168 | cycled = 1; /* ignore range_cyclic tests */ | |
1169 | } | |
1170 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1171 | tag = PAGECACHE_TAG_TOWRITE; | |
1172 | else | |
1173 | tag = PAGECACHE_TAG_DIRTY; | |
1174 | retry: | |
1175 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1176 | tag_pages_for_writeback(mapping, index, end); | |
1177 | done_index = index; | |
1178 | while (!done && (index <= end)) { | |
1179 | int i; | |
1180 | ||
1181 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1182 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1183 | if (nr_pages == 0) | |
1184 | break; | |
1185 | ||
1186 | for (i = 0; i < nr_pages; i++) { | |
1187 | struct page *page = pvec.pages[i]; | |
1188 | ||
1189 | if (page->index > end) { | |
1190 | done = 1; | |
1191 | break; | |
1192 | } | |
1193 | ||
1194 | done_index = page->index; | |
1195 | ||
1196 | lock_page(page); | |
1197 | ||
1198 | if (unlikely(page->mapping != mapping)) { | |
1199 | continue_unlock: | |
1200 | unlock_page(page); | |
1201 | continue; | |
1202 | } | |
1203 | ||
1204 | if (!PageDirty(page)) { | |
1205 | /* someone wrote it for us */ | |
1206 | goto continue_unlock; | |
1207 | } | |
1208 | ||
1209 | if (step == 0 && !is_cold_data(page)) | |
1210 | goto continue_unlock; | |
1211 | if (step == 1 && is_cold_data(page)) | |
1212 | goto continue_unlock; | |
1213 | ||
1214 | if (PageWriteback(page)) { | |
1215 | if (wbc->sync_mode != WB_SYNC_NONE) | |
1216 | f2fs_wait_on_page_writeback(page, DATA); | |
1217 | else | |
1218 | goto continue_unlock; | |
1219 | } | |
1220 | ||
1221 | BUG_ON(PageWriteback(page)); | |
1222 | if (!clear_page_dirty_for_io(page)) | |
1223 | goto continue_unlock; | |
1224 | ||
1225 | ret = (*writepage)(page, wbc, data); | |
1226 | if (unlikely(ret)) { | |
1227 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1228 | unlock_page(page); | |
1229 | ret = 0; | |
1230 | } else { | |
1231 | done_index = page->index + 1; | |
1232 | done = 1; | |
1233 | break; | |
1234 | } | |
1235 | } | |
1236 | ||
1237 | if (--wbc->nr_to_write <= 0 && | |
1238 | wbc->sync_mode == WB_SYNC_NONE) { | |
1239 | done = 1; | |
1240 | break; | |
1241 | } | |
1242 | } | |
1243 | pagevec_release(&pvec); | |
1244 | cond_resched(); | |
1245 | } | |
1246 | ||
1247 | if (step < 1) { | |
1248 | step++; | |
1249 | goto next; | |
1250 | } | |
1251 | ||
1252 | if (!cycled && !done) { | |
1253 | cycled = 1; | |
1254 | index = 0; | |
1255 | end = writeback_index - 1; | |
1256 | goto retry; | |
1257 | } | |
1258 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1259 | mapping->writeback_index = done_index; | |
1260 | ||
1261 | return ret; | |
1262 | } | |
1263 | ||
25ca923b | 1264 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1265 | struct writeback_control *wbc) |
1266 | { | |
1267 | struct inode *inode = mapping->host; | |
4081363f | 1268 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1269 | bool locked = false; |
eb47b800 | 1270 | int ret; |
50c8cdb3 | 1271 | long diff; |
eb47b800 | 1272 | |
e5748434 CY |
1273 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1274 | ||
cfb185a1 | 1275 | /* deal with chardevs and other special file */ |
1276 | if (!mapping->a_ops->writepage) | |
1277 | return 0; | |
1278 | ||
87d6f890 | 1279 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
a7ffdbe2 | 1280 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && |
6fb03f3a | 1281 | available_free_memory(sbi, DIRTY_DENTS)) |
d3baf95d | 1282 | goto skip_write; |
87d6f890 | 1283 | |
d5669f7b JK |
1284 | /* during POR, we don't need to trigger writepage at all. */ |
1285 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1286 | goto skip_write; | |
1287 | ||
50c8cdb3 | 1288 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1289 | |
5463e7c1 JK |
1290 | if (!S_ISDIR(inode->i_mode)) { |
1291 | mutex_lock(&sbi->writepages); | |
1292 | locked = true; | |
1293 | } | |
8f46dcae | 1294 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
bb96a8d5 | 1295 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
5463e7c1 JK |
1296 | if (locked) |
1297 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1298 | |
eb47b800 JK |
1299 | remove_dirty_dir_inode(inode); |
1300 | ||
50c8cdb3 | 1301 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1302 | return ret; |
d3baf95d JK |
1303 | |
1304 | skip_write: | |
a7ffdbe2 | 1305 | wbc->pages_skipped += get_dirty_pages(inode); |
d3baf95d | 1306 | return 0; |
eb47b800 JK |
1307 | } |
1308 | ||
3aab8f82 CY |
1309 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1310 | { | |
1311 | struct inode *inode = mapping->host; | |
1312 | ||
1313 | if (to > inode->i_size) { | |
1314 | truncate_pagecache(inode, inode->i_size); | |
764aa3e9 | 1315 | truncate_blocks(inode, inode->i_size, true); |
3aab8f82 CY |
1316 | } |
1317 | } | |
1318 | ||
eb47b800 JK |
1319 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1320 | loff_t pos, unsigned len, unsigned flags, | |
1321 | struct page **pagep, void **fsdata) | |
1322 | { | |
1323 | struct inode *inode = mapping->host; | |
4081363f | 1324 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9ba69cf9 | 1325 | struct page *page, *ipage; |
eb47b800 JK |
1326 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
1327 | struct dnode_of_data dn; | |
1328 | int err = 0; | |
1329 | ||
62aed044 CY |
1330 | trace_f2fs_write_begin(inode, pos, len, flags); |
1331 | ||
eb47b800 | 1332 | f2fs_balance_fs(sbi); |
5f727395 JK |
1333 | |
1334 | /* | |
1335 | * We should check this at this moment to avoid deadlock on inode page | |
1336 | * and #0 page. The locking rule for inline_data conversion should be: | |
1337 | * lock_page(page #0) -> lock_page(inode_page) | |
1338 | */ | |
1339 | if (index != 0) { | |
1340 | err = f2fs_convert_inline_inode(inode); | |
1341 | if (err) | |
1342 | goto fail; | |
1343 | } | |
afcb7ca0 | 1344 | repeat: |
eb47b800 | 1345 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1346 | if (!page) { |
1347 | err = -ENOMEM; | |
1348 | goto fail; | |
1349 | } | |
d5f66990 | 1350 | |
eb47b800 JK |
1351 | *pagep = page; |
1352 | ||
e479556b | 1353 | f2fs_lock_op(sbi); |
9ba69cf9 JK |
1354 | |
1355 | /* check inline_data */ | |
1356 | ipage = get_node_page(sbi, inode->i_ino); | |
cd34e296 CY |
1357 | if (IS_ERR(ipage)) { |
1358 | err = PTR_ERR(ipage); | |
9ba69cf9 | 1359 | goto unlock_fail; |
cd34e296 | 1360 | } |
9ba69cf9 | 1361 | |
b3d208f9 JK |
1362 | set_new_dnode(&dn, inode, ipage, ipage, 0); |
1363 | ||
9ba69cf9 | 1364 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 JK |
1365 | if (pos + len <= MAX_INLINE_DATA) { |
1366 | read_inline_data(page, ipage); | |
1367 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
1368 | sync_inode_page(&dn); | |
1369 | goto put_next; | |
b3d208f9 | 1370 | } |
5f727395 JK |
1371 | err = f2fs_convert_inline_page(&dn, page); |
1372 | if (err) | |
1373 | goto put_fail; | |
b600965c | 1374 | } |
9ba69cf9 JK |
1375 | err = f2fs_reserve_block(&dn, index); |
1376 | if (err) | |
8cdcb713 | 1377 | goto put_fail; |
b3d208f9 | 1378 | put_next: |
9ba69cf9 JK |
1379 | f2fs_put_dnode(&dn); |
1380 | f2fs_unlock_op(sbi); | |
1381 | ||
90d4388a CY |
1382 | if (len == PAGE_CACHE_SIZE) |
1383 | goto out_update; | |
1384 | if (PageUptodate(page)) | |
1385 | goto out_clear; | |
eb47b800 | 1386 | |
b3d208f9 JK |
1387 | f2fs_wait_on_page_writeback(page, DATA); |
1388 | ||
eb47b800 JK |
1389 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { |
1390 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1391 | unsigned end = start + len; | |
1392 | ||
1393 | /* Reading beyond i_size is simple: memset to zero */ | |
1394 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
90d4388a | 1395 | goto out_update; |
eb47b800 JK |
1396 | } |
1397 | ||
b3d208f9 | 1398 | if (dn.data_blkaddr == NEW_ADDR) { |
eb47b800 JK |
1399 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1400 | } else { | |
cf04e8eb | 1401 | struct f2fs_io_info fio = { |
05ca3632 | 1402 | .sbi = sbi, |
cf04e8eb JK |
1403 | .type = DATA, |
1404 | .rw = READ_SYNC, | |
1405 | .blk_addr = dn.data_blkaddr, | |
05ca3632 | 1406 | .page = page, |
4375a336 | 1407 | .encrypted_page = NULL, |
cf04e8eb | 1408 | }; |
05ca3632 | 1409 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1410 | if (err) |
1411 | goto fail; | |
d54c795b | 1412 | |
393ff91f | 1413 | lock_page(page); |
6bacf52f | 1414 | if (unlikely(!PageUptodate(page))) { |
393ff91f | 1415 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1416 | err = -EIO; |
1417 | goto fail; | |
eb47b800 | 1418 | } |
6bacf52f | 1419 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1420 | f2fs_put_page(page, 1); |
1421 | goto repeat; | |
eb47b800 | 1422 | } |
4375a336 JK |
1423 | |
1424 | /* avoid symlink page */ | |
1425 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1426 | err = f2fs_decrypt_one(inode, page); | |
1427 | if (err) { | |
1428 | f2fs_put_page(page, 1); | |
1429 | goto fail; | |
1430 | } | |
1431 | } | |
eb47b800 | 1432 | } |
90d4388a | 1433 | out_update: |
eb47b800 | 1434 | SetPageUptodate(page); |
90d4388a | 1435 | out_clear: |
eb47b800 JK |
1436 | clear_cold_data(page); |
1437 | return 0; | |
9ba69cf9 | 1438 | |
8cdcb713 JK |
1439 | put_fail: |
1440 | f2fs_put_dnode(&dn); | |
9ba69cf9 JK |
1441 | unlock_fail: |
1442 | f2fs_unlock_op(sbi); | |
b3d208f9 | 1443 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1444 | fail: |
1445 | f2fs_write_failed(mapping, pos + len); | |
1446 | return err; | |
eb47b800 JK |
1447 | } |
1448 | ||
a1dd3c13 JK |
1449 | static int f2fs_write_end(struct file *file, |
1450 | struct address_space *mapping, | |
1451 | loff_t pos, unsigned len, unsigned copied, | |
1452 | struct page *page, void *fsdata) | |
1453 | { | |
1454 | struct inode *inode = page->mapping->host; | |
1455 | ||
dfb2bf38 CY |
1456 | trace_f2fs_write_end(inode, pos, len, copied); |
1457 | ||
34ba94ba | 1458 | set_page_dirty(page); |
a1dd3c13 JK |
1459 | |
1460 | if (pos + copied > i_size_read(inode)) { | |
1461 | i_size_write(inode, pos + copied); | |
1462 | mark_inode_dirty(inode); | |
1463 | update_inode_page(inode); | |
1464 | } | |
1465 | ||
75c3c8bc | 1466 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
1467 | return copied; |
1468 | } | |
1469 | ||
6f673763 OS |
1470 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1471 | loff_t offset) | |
944fcfc1 JK |
1472 | { |
1473 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1474 | |
6f673763 | 1475 | if (iov_iter_rw(iter) == READ) |
944fcfc1 JK |
1476 | return 0; |
1477 | ||
1478 | if (offset & blocksize_mask) | |
1479 | return -EINVAL; | |
1480 | ||
5b46f25d AV |
1481 | if (iov_iter_alignment(iter) & blocksize_mask) |
1482 | return -EINVAL; | |
1483 | ||
944fcfc1 JK |
1484 | return 0; |
1485 | } | |
1486 | ||
22c6186e OS |
1487 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1488 | loff_t offset) | |
eb47b800 JK |
1489 | { |
1490 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1491 | struct address_space *mapping = file->f_mapping; |
1492 | struct inode *inode = mapping->host; | |
1493 | size_t count = iov_iter_count(iter); | |
1494 | int err; | |
944fcfc1 | 1495 | |
b3d208f9 JK |
1496 | /* we don't need to use inline_data strictly */ |
1497 | if (f2fs_has_inline_data(inode)) { | |
1498 | err = f2fs_convert_inline_inode(inode); | |
1499 | if (err) | |
1500 | return err; | |
1501 | } | |
9ffe0fb5 | 1502 | |
fcc85a4d JK |
1503 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1504 | return 0; | |
1505 | ||
6f673763 | 1506 | if (check_direct_IO(inode, iter, offset)) |
944fcfc1 JK |
1507 | return 0; |
1508 | ||
6f673763 | 1509 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1510 | |
6f673763 | 1511 | if (iov_iter_rw(iter) == WRITE) |
59b802e5 JK |
1512 | __allocate_data_blocks(inode, offset, count); |
1513 | ||
17f8c842 | 1514 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block); |
6f673763 | 1515 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1516 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1517 | |
6f673763 | 1518 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1519 | |
3aab8f82 | 1520 | return err; |
eb47b800 JK |
1521 | } |
1522 | ||
487261f3 CY |
1523 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1524 | unsigned int length) | |
eb47b800 JK |
1525 | { |
1526 | struct inode *inode = page->mapping->host; | |
487261f3 | 1527 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1528 | |
487261f3 CY |
1529 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1530 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1531 | return; |
1532 | ||
487261f3 CY |
1533 | if (PageDirty(page)) { |
1534 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1535 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1536 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1537 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1538 | else | |
1539 | inode_dec_dirty_pages(inode); | |
1540 | } | |
eb47b800 JK |
1541 | ClearPagePrivate(page); |
1542 | } | |
1543 | ||
487261f3 | 1544 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1545 | { |
f68daeeb JK |
1546 | /* If this is dirty page, keep PagePrivate */ |
1547 | if (PageDirty(page)) | |
1548 | return 0; | |
1549 | ||
eb47b800 | 1550 | ClearPagePrivate(page); |
c3850aa1 | 1551 | return 1; |
eb47b800 JK |
1552 | } |
1553 | ||
1554 | static int f2fs_set_data_page_dirty(struct page *page) | |
1555 | { | |
1556 | struct address_space *mapping = page->mapping; | |
1557 | struct inode *inode = mapping->host; | |
1558 | ||
26c6b887 JK |
1559 | trace_f2fs_set_page_dirty(page, DATA); |
1560 | ||
eb47b800 | 1561 | SetPageUptodate(page); |
34ba94ba | 1562 | |
1e84371f | 1563 | if (f2fs_is_atomic_file(inode)) { |
34ba94ba JK |
1564 | register_inmem_page(inode, page); |
1565 | return 1; | |
1566 | } | |
1567 | ||
eb47b800 JK |
1568 | if (!PageDirty(page)) { |
1569 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1570 | update_dirty_page(inode, page); |
eb47b800 JK |
1571 | return 1; |
1572 | } | |
1573 | return 0; | |
1574 | } | |
1575 | ||
c01e54b7 JK |
1576 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1577 | { | |
454ae7e5 CY |
1578 | struct inode *inode = mapping->host; |
1579 | ||
b3d208f9 JK |
1580 | /* we don't need to use inline_data strictly */ |
1581 | if (f2fs_has_inline_data(inode)) { | |
1582 | int err = f2fs_convert_inline_inode(inode); | |
1583 | if (err) | |
1584 | return err; | |
1585 | } | |
bfad7c2d | 1586 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1587 | } |
1588 | ||
eb47b800 JK |
1589 | const struct address_space_operations f2fs_dblock_aops = { |
1590 | .readpage = f2fs_read_data_page, | |
1591 | .readpages = f2fs_read_data_pages, | |
1592 | .writepage = f2fs_write_data_page, | |
1593 | .writepages = f2fs_write_data_pages, | |
1594 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1595 | .write_end = f2fs_write_end, |
eb47b800 | 1596 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1597 | .invalidatepage = f2fs_invalidate_page, |
1598 | .releasepage = f2fs_release_page, | |
eb47b800 | 1599 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1600 | .bmap = f2fs_bmap, |
eb47b800 | 1601 | }; |