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); | |
93dfe2ac JK |
159 | return -EFAULT; |
160 | } | |
161 | ||
cf04e8eb | 162 | submit_bio(fio->rw, bio); |
93dfe2ac JK |
163 | return 0; |
164 | } | |
165 | ||
05ca3632 | 166 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 167 | { |
05ca3632 | 168 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 169 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 170 | struct f2fs_bio_info *io; |
940a6d34 | 171 | bool is_read = is_read_io(fio->rw); |
4375a336 | 172 | struct page *bio_page; |
93dfe2ac | 173 | |
940a6d34 | 174 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 175 | |
cf04e8eb | 176 | verify_block_addr(sbi, fio->blk_addr); |
93dfe2ac | 177 | |
df0f8dc0 | 178 | down_write(&io->io_rwsem); |
93dfe2ac | 179 | |
940a6d34 | 180 | if (!is_read) |
93dfe2ac JK |
181 | inc_page_count(sbi, F2FS_WRITEBACK); |
182 | ||
cf04e8eb | 183 | if (io->bio && (io->last_block_in_bio != fio->blk_addr - 1 || |
458e6197 JK |
184 | io->fio.rw != fio->rw)) |
185 | __submit_merged_bio(io); | |
93dfe2ac JK |
186 | alloc_new: |
187 | if (io->bio == NULL) { | |
90a893c7 | 188 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 189 | |
cf04e8eb | 190 | io->bio = __bio_alloc(sbi, fio->blk_addr, bio_blocks, is_read); |
458e6197 | 191 | io->fio = *fio; |
93dfe2ac JK |
192 | } |
193 | ||
4375a336 JK |
194 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
195 | ||
196 | if (bio_add_page(io->bio, bio_page, PAGE_CACHE_SIZE, 0) < | |
93dfe2ac | 197 | PAGE_CACHE_SIZE) { |
458e6197 | 198 | __submit_merged_bio(io); |
93dfe2ac JK |
199 | goto alloc_new; |
200 | } | |
201 | ||
cf04e8eb | 202 | io->last_block_in_bio = fio->blk_addr; |
05ca3632 | 203 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 204 | |
df0f8dc0 | 205 | up_write(&io->io_rwsem); |
05ca3632 | 206 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
207 | } |
208 | ||
0a8165d7 | 209 | /* |
eb47b800 JK |
210 | * Lock ordering for the change of data block address: |
211 | * ->data_page | |
212 | * ->node_page | |
213 | * update block addresses in the node page | |
214 | */ | |
216a620a | 215 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 JK |
216 | { |
217 | struct f2fs_node *rn; | |
218 | __le32 *addr_array; | |
219 | struct page *node_page = dn->node_page; | |
220 | unsigned int ofs_in_node = dn->ofs_in_node; | |
221 | ||
5514f0aa | 222 | f2fs_wait_on_page_writeback(node_page, NODE); |
eb47b800 | 223 | |
45590710 | 224 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
225 | |
226 | /* Get physical address of data block */ | |
227 | addr_array = blkaddr_in_node(rn); | |
e1509cf2 | 228 | addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
eb47b800 JK |
229 | set_page_dirty(node_page); |
230 | } | |
231 | ||
232 | int reserve_new_block(struct dnode_of_data *dn) | |
233 | { | |
4081363f | 234 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 235 | |
6bacf52f | 236 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 237 | return -EPERM; |
cfb271d4 | 238 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
239 | return -ENOSPC; |
240 | ||
c01e2853 NJ |
241 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
242 | ||
eb47b800 | 243 | dn->data_blkaddr = NEW_ADDR; |
216a620a | 244 | set_data_blkaddr(dn); |
a18ff063 | 245 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
246 | sync_inode_page(dn); |
247 | return 0; | |
248 | } | |
249 | ||
b600965c HL |
250 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
251 | { | |
252 | bool need_put = dn->inode_page ? false : true; | |
253 | int err; | |
254 | ||
255 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
256 | if (err) | |
257 | return err; | |
a8865372 | 258 | |
b600965c HL |
259 | if (dn->data_blkaddr == NULL_ADDR) |
260 | err = reserve_new_block(dn); | |
a8865372 | 261 | if (err || need_put) |
b600965c HL |
262 | f2fs_put_dnode(dn); |
263 | return err; | |
264 | } | |
265 | ||
43f3eae1 | 266 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, int rw) |
eb47b800 | 267 | { |
eb47b800 JK |
268 | struct address_space *mapping = inode->i_mapping; |
269 | struct dnode_of_data dn; | |
270 | struct page *page; | |
cb3bc9ee | 271 | struct extent_info ei; |
eb47b800 | 272 | int err; |
cf04e8eb | 273 | struct f2fs_io_info fio = { |
05ca3632 | 274 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 275 | .type = DATA, |
43f3eae1 | 276 | .rw = rw, |
4375a336 | 277 | .encrypted_page = NULL, |
cf04e8eb | 278 | }; |
eb47b800 | 279 | |
4375a336 JK |
280 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
281 | return read_mapping_page(mapping, index, NULL); | |
282 | ||
9ac1349a | 283 | page = grab_cache_page(mapping, index); |
650495de JK |
284 | if (!page) |
285 | return ERR_PTR(-ENOMEM); | |
286 | ||
cb3bc9ee CY |
287 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
288 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
289 | goto got_it; | |
290 | } | |
291 | ||
eb47b800 | 292 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 293 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
294 | if (err) |
295 | goto put_err; | |
eb47b800 JK |
296 | f2fs_put_dnode(&dn); |
297 | ||
6bacf52f | 298 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
299 | err = -ENOENT; |
300 | goto put_err; | |
650495de | 301 | } |
cb3bc9ee | 302 | got_it: |
43f3eae1 JK |
303 | if (PageUptodate(page)) { |
304 | unlock_page(page); | |
eb47b800 | 305 | return page; |
43f3eae1 | 306 | } |
eb47b800 | 307 | |
d59ff4df JK |
308 | /* |
309 | * A new dentry page is allocated but not able to be written, since its | |
310 | * new inode page couldn't be allocated due to -ENOSPC. | |
311 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
312 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
313 | */ | |
314 | if (dn.data_blkaddr == NEW_ADDR) { | |
315 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
316 | SetPageUptodate(page); | |
43f3eae1 | 317 | unlock_page(page); |
d59ff4df JK |
318 | return page; |
319 | } | |
eb47b800 | 320 | |
cf04e8eb | 321 | fio.blk_addr = dn.data_blkaddr; |
05ca3632 JK |
322 | fio.page = page; |
323 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 324 | if (err) |
86531d6b | 325 | goto put_err; |
43f3eae1 | 326 | return page; |
86531d6b JK |
327 | |
328 | put_err: | |
329 | f2fs_put_page(page, 1); | |
330 | return ERR_PTR(err); | |
43f3eae1 JK |
331 | } |
332 | ||
333 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
334 | { | |
335 | struct address_space *mapping = inode->i_mapping; | |
336 | struct page *page; | |
337 | ||
338 | page = find_get_page(mapping, index); | |
339 | if (page && PageUptodate(page)) | |
340 | return page; | |
341 | f2fs_put_page(page, 0); | |
342 | ||
343 | page = get_read_data_page(inode, index, READ_SYNC); | |
344 | if (IS_ERR(page)) | |
345 | return page; | |
346 | ||
347 | if (PageUptodate(page)) | |
348 | return page; | |
349 | ||
350 | wait_on_page_locked(page); | |
351 | if (unlikely(!PageUptodate(page))) { | |
352 | f2fs_put_page(page, 0); | |
353 | return ERR_PTR(-EIO); | |
354 | } | |
355 | return page; | |
356 | } | |
357 | ||
358 | /* | |
359 | * If it tries to access a hole, return an error. | |
360 | * Because, the callers, functions in dir.c and GC, should be able to know | |
361 | * whether this page exists or not. | |
362 | */ | |
363 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index) | |
364 | { | |
365 | struct address_space *mapping = inode->i_mapping; | |
366 | struct page *page; | |
367 | repeat: | |
368 | page = get_read_data_page(inode, index, READ_SYNC); | |
369 | if (IS_ERR(page)) | |
370 | return page; | |
393ff91f | 371 | |
43f3eae1 | 372 | /* wait for read completion */ |
393ff91f | 373 | lock_page(page); |
6bacf52f | 374 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
375 | f2fs_put_page(page, 1); |
376 | return ERR_PTR(-EIO); | |
eb47b800 | 377 | } |
6bacf52f | 378 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
379 | f2fs_put_page(page, 1); |
380 | goto repeat; | |
eb47b800 JK |
381 | } |
382 | return page; | |
383 | } | |
384 | ||
0a8165d7 | 385 | /* |
eb47b800 JK |
386 | * Caller ensures that this data page is never allocated. |
387 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 388 | * |
4f4124d0 CY |
389 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
390 | * f2fs_unlock_op(). | |
a8865372 | 391 | * Note that, ipage is set only by make_empty_dir. |
eb47b800 | 392 | */ |
64aa7ed9 | 393 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 394 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 395 | { |
eb47b800 JK |
396 | struct address_space *mapping = inode->i_mapping; |
397 | struct page *page; | |
398 | struct dnode_of_data dn; | |
399 | int err; | |
01f28610 JK |
400 | repeat: |
401 | page = grab_cache_page(mapping, index); | |
402 | if (!page) | |
403 | return ERR_PTR(-ENOMEM); | |
eb47b800 | 404 | |
a8865372 | 405 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 406 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
407 | if (err) { |
408 | f2fs_put_page(page, 1); | |
eb47b800 | 409 | return ERR_PTR(err); |
a8865372 | 410 | } |
01f28610 JK |
411 | if (!ipage) |
412 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
413 | |
414 | if (PageUptodate(page)) | |
01f28610 | 415 | goto got_it; |
eb47b800 JK |
416 | |
417 | if (dn.data_blkaddr == NEW_ADDR) { | |
418 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 419 | SetPageUptodate(page); |
eb47b800 | 420 | } else { |
4375a336 | 421 | f2fs_put_page(page, 1); |
a8865372 | 422 | |
4375a336 JK |
423 | page = get_read_data_page(inode, index, READ_SYNC); |
424 | if (IS_ERR(page)) | |
afcb7ca0 | 425 | goto repeat; |
4375a336 JK |
426 | |
427 | /* wait for read completion */ | |
428 | lock_page(page); | |
eb47b800 | 429 | } |
01f28610 | 430 | got_it: |
eb47b800 JK |
431 | if (new_i_size && |
432 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
433 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
434 | /* Only the directory inode sets new_i_size */ |
435 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
436 | } |
437 | return page; | |
438 | } | |
439 | ||
bfad7c2d JK |
440 | static int __allocate_data_block(struct dnode_of_data *dn) |
441 | { | |
4081363f | 442 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
976e4c50 | 443 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); |
bfad7c2d | 444 | struct f2fs_summary sum; |
bfad7c2d | 445 | struct node_info ni; |
38aa0889 | 446 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 447 | pgoff_t fofs; |
bfad7c2d JK |
448 | |
449 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
450 | return -EPERM; | |
df6136ef CY |
451 | |
452 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
453 | if (dn->data_blkaddr == NEW_ADDR) | |
454 | goto alloc; | |
455 | ||
bfad7c2d JK |
456 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
457 | return -ENOSPC; | |
458 | ||
df6136ef | 459 | alloc: |
bfad7c2d JK |
460 | get_node_info(sbi, dn->nid, &ni); |
461 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
462 | ||
38aa0889 JK |
463 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
464 | seg = CURSEG_DIRECT_IO; | |
465 | ||
df6136ef CY |
466 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
467 | &sum, seg); | |
216a620a | 468 | set_data_blkaddr(dn); |
bfad7c2d | 469 | |
976e4c50 JK |
470 | /* update i_size */ |
471 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + | |
472 | dn->ofs_in_node; | |
473 | if (i_size_read(dn->inode) < ((fofs + 1) << PAGE_CACHE_SHIFT)) | |
474 | i_size_write(dn->inode, ((fofs + 1) << PAGE_CACHE_SHIFT)); | |
475 | ||
3e72f721 | 476 | /* direct IO doesn't use extent cache to maximize the performance */ |
a28ef1f5 | 477 | f2fs_drop_largest_extent(dn->inode, fofs); |
3e72f721 | 478 | |
bfad7c2d JK |
479 | return 0; |
480 | } | |
481 | ||
59b802e5 JK |
482 | static void __allocate_data_blocks(struct inode *inode, loff_t offset, |
483 | size_t count) | |
484 | { | |
485 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
486 | struct dnode_of_data dn; | |
487 | u64 start = F2FS_BYTES_TO_BLK(offset); | |
488 | u64 len = F2FS_BYTES_TO_BLK(count); | |
489 | bool allocated; | |
490 | u64 end_offset; | |
491 | ||
492 | while (len) { | |
493 | f2fs_balance_fs(sbi); | |
494 | f2fs_lock_op(sbi); | |
495 | ||
496 | /* When reading holes, we need its node page */ | |
497 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
498 | if (get_dnode_of_data(&dn, start, ALLOC_NODE)) | |
499 | goto out; | |
500 | ||
501 | allocated = false; | |
502 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); | |
503 | ||
504 | while (dn.ofs_in_node < end_offset && len) { | |
d6d4f1cb CY |
505 | block_t blkaddr; |
506 | ||
507 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
df6136ef | 508 | if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) { |
59b802e5 JK |
509 | if (__allocate_data_block(&dn)) |
510 | goto sync_out; | |
511 | allocated = true; | |
512 | } | |
513 | len--; | |
514 | start++; | |
515 | dn.ofs_in_node++; | |
516 | } | |
517 | ||
518 | if (allocated) | |
519 | sync_inode_page(&dn); | |
520 | ||
521 | f2fs_put_dnode(&dn); | |
522 | f2fs_unlock_op(sbi); | |
523 | } | |
524 | return; | |
525 | ||
526 | sync_out: | |
527 | if (allocated) | |
528 | sync_inode_page(&dn); | |
529 | f2fs_put_dnode(&dn); | |
530 | out: | |
531 | f2fs_unlock_op(sbi); | |
532 | return; | |
533 | } | |
534 | ||
0a8165d7 | 535 | /* |
003a3e1d JK |
536 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
537 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
538 | * If original data blocks are allocated, then give them to blockdev. |
539 | * Otherwise, | |
540 | * a. preallocate requested block addresses | |
541 | * b. do not use extent cache for better performance | |
542 | * c. give the block addresses to blockdev | |
eb47b800 | 543 | */ |
003a3e1d JK |
544 | static int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
545 | int create, bool fiemap) | |
eb47b800 | 546 | { |
003a3e1d | 547 | unsigned int maxblocks = map->m_len; |
eb47b800 | 548 | struct dnode_of_data dn; |
bfad7c2d JK |
549 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
550 | pgoff_t pgofs, end_offset; | |
551 | int err = 0, ofs = 1; | |
a2e7d1bf | 552 | struct extent_info ei; |
bfad7c2d | 553 | bool allocated = false; |
eb47b800 | 554 | |
003a3e1d JK |
555 | map->m_len = 0; |
556 | map->m_flags = 0; | |
557 | ||
558 | /* it only supports block size == page size */ | |
559 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 560 | |
7e4dde79 | 561 | if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
562 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
563 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
564 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 565 | goto out; |
a2e7d1bf | 566 | } |
bfad7c2d | 567 | |
59b802e5 | 568 | if (create) |
4081363f | 569 | f2fs_lock_op(F2FS_I_SB(inode)); |
eb47b800 JK |
570 | |
571 | /* When reading holes, we need its node page */ | |
572 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 573 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 574 | if (err) { |
bfad7c2d JK |
575 | if (err == -ENOENT) |
576 | err = 0; | |
577 | goto unlock_out; | |
848753aa | 578 | } |
ccfb3000 | 579 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 | 580 | goto put_out; |
eb47b800 | 581 | |
bfad7c2d | 582 | if (dn.data_blkaddr != NULL_ADDR) { |
003a3e1d JK |
583 | map->m_flags = F2FS_MAP_MAPPED; |
584 | map->m_pblk = dn.data_blkaddr; | |
7f63eb77 JK |
585 | if (dn.data_blkaddr == NEW_ADDR) |
586 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
bfad7c2d JK |
587 | } else if (create) { |
588 | err = __allocate_data_block(&dn); | |
589 | if (err) | |
590 | goto put_out; | |
591 | allocated = true; | |
003a3e1d JK |
592 | map->m_flags = F2FS_MAP_NEW | F2FS_MAP_MAPPED; |
593 | map->m_pblk = dn.data_blkaddr; | |
bfad7c2d JK |
594 | } else { |
595 | goto put_out; | |
596 | } | |
597 | ||
6403eb1f | 598 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
003a3e1d | 599 | map->m_len = 1; |
bfad7c2d JK |
600 | dn.ofs_in_node++; |
601 | pgofs++; | |
602 | ||
603 | get_next: | |
604 | if (dn.ofs_in_node >= end_offset) { | |
605 | if (allocated) | |
606 | sync_inode_page(&dn); | |
607 | allocated = false; | |
608 | f2fs_put_dnode(&dn); | |
609 | ||
610 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
611 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 612 | if (err) { |
bfad7c2d JK |
613 | if (err == -ENOENT) |
614 | err = 0; | |
615 | goto unlock_out; | |
616 | } | |
ccfb3000 | 617 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 JK |
618 | goto put_out; |
619 | ||
6403eb1f | 620 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 621 | } |
eb47b800 | 622 | |
003a3e1d | 623 | if (maxblocks > map->m_len) { |
bfad7c2d JK |
624 | block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
625 | if (blkaddr == NULL_ADDR && create) { | |
626 | err = __allocate_data_block(&dn); | |
627 | if (err) | |
628 | goto sync_out; | |
629 | allocated = true; | |
003a3e1d | 630 | map->m_flags |= F2FS_MAP_NEW; |
bfad7c2d JK |
631 | blkaddr = dn.data_blkaddr; |
632 | } | |
e1c42045 | 633 | /* Give more consecutive addresses for the readahead */ |
7f63eb77 JK |
634 | if ((map->m_pblk != NEW_ADDR && |
635 | blkaddr == (map->m_pblk + ofs)) || | |
636 | (map->m_pblk == NEW_ADDR && | |
637 | blkaddr == NEW_ADDR)) { | |
bfad7c2d JK |
638 | ofs++; |
639 | dn.ofs_in_node++; | |
640 | pgofs++; | |
003a3e1d | 641 | map->m_len++; |
bfad7c2d JK |
642 | goto get_next; |
643 | } | |
eb47b800 | 644 | } |
bfad7c2d JK |
645 | sync_out: |
646 | if (allocated) | |
647 | sync_inode_page(&dn); | |
648 | put_out: | |
eb47b800 | 649 | f2fs_put_dnode(&dn); |
bfad7c2d JK |
650 | unlock_out: |
651 | if (create) | |
4081363f | 652 | f2fs_unlock_op(F2FS_I_SB(inode)); |
bfad7c2d | 653 | out: |
003a3e1d | 654 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 655 | return err; |
eb47b800 JK |
656 | } |
657 | ||
003a3e1d JK |
658 | static int __get_data_block(struct inode *inode, sector_t iblock, |
659 | struct buffer_head *bh, int create, bool fiemap) | |
660 | { | |
661 | struct f2fs_map_blocks map; | |
662 | int ret; | |
663 | ||
664 | map.m_lblk = iblock; | |
665 | map.m_len = bh->b_size >> inode->i_blkbits; | |
666 | ||
667 | ret = f2fs_map_blocks(inode, &map, create, fiemap); | |
668 | if (!ret) { | |
669 | map_bh(bh, inode->i_sb, map.m_pblk); | |
670 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
671 | bh->b_size = map.m_len << inode->i_blkbits; | |
672 | } | |
673 | return ret; | |
674 | } | |
675 | ||
ccfb3000 JK |
676 | static int get_data_block(struct inode *inode, sector_t iblock, |
677 | struct buffer_head *bh_result, int create) | |
678 | { | |
679 | return __get_data_block(inode, iblock, bh_result, create, false); | |
680 | } | |
681 | ||
682 | static int get_data_block_fiemap(struct inode *inode, sector_t iblock, | |
683 | struct buffer_head *bh_result, int create) | |
684 | { | |
685 | return __get_data_block(inode, iblock, bh_result, create, true); | |
686 | } | |
687 | ||
7f63eb77 JK |
688 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
689 | { | |
690 | return (offset >> inode->i_blkbits); | |
691 | } | |
692 | ||
693 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
694 | { | |
695 | return (blk << inode->i_blkbits); | |
696 | } | |
697 | ||
9ab70134 JK |
698 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
699 | u64 start, u64 len) | |
700 | { | |
7f63eb77 JK |
701 | struct buffer_head map_bh; |
702 | sector_t start_blk, last_blk; | |
703 | loff_t isize = i_size_read(inode); | |
704 | u64 logical = 0, phys = 0, size = 0; | |
705 | u32 flags = 0; | |
706 | bool past_eof = false, whole_file = false; | |
707 | int ret = 0; | |
708 | ||
709 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
710 | if (ret) | |
711 | return ret; | |
712 | ||
713 | mutex_lock(&inode->i_mutex); | |
714 | ||
715 | if (len >= isize) { | |
716 | whole_file = true; | |
717 | len = isize; | |
718 | } | |
719 | ||
720 | if (logical_to_blk(inode, len) == 0) | |
721 | len = blk_to_logical(inode, 1); | |
722 | ||
723 | start_blk = logical_to_blk(inode, start); | |
724 | last_blk = logical_to_blk(inode, start + len - 1); | |
725 | next: | |
726 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
727 | map_bh.b_size = len; | |
728 | ||
729 | ret = get_data_block_fiemap(inode, start_blk, &map_bh, 0); | |
730 | if (ret) | |
731 | goto out; | |
732 | ||
733 | /* HOLE */ | |
734 | if (!buffer_mapped(&map_bh)) { | |
735 | start_blk++; | |
736 | ||
737 | if (!past_eof && blk_to_logical(inode, start_blk) >= isize) | |
738 | past_eof = 1; | |
739 | ||
740 | if (past_eof && size) { | |
741 | flags |= FIEMAP_EXTENT_LAST; | |
742 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
743 | phys, size, flags); | |
744 | } else if (size) { | |
745 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
746 | phys, size, flags); | |
747 | size = 0; | |
748 | } | |
749 | ||
750 | /* if we have holes up to/past EOF then we're done */ | |
751 | if (start_blk > last_blk || past_eof || ret) | |
752 | goto out; | |
753 | } else { | |
754 | if (start_blk > last_blk && !whole_file) { | |
755 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
756 | phys, size, flags); | |
757 | goto out; | |
758 | } | |
759 | ||
760 | /* | |
761 | * if size != 0 then we know we already have an extent | |
762 | * to add, so add it. | |
763 | */ | |
764 | if (size) { | |
765 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
766 | phys, size, flags); | |
767 | if (ret) | |
768 | goto out; | |
769 | } | |
770 | ||
771 | logical = blk_to_logical(inode, start_blk); | |
772 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
773 | size = map_bh.b_size; | |
774 | flags = 0; | |
775 | if (buffer_unwritten(&map_bh)) | |
776 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
777 | ||
778 | start_blk += logical_to_blk(inode, size); | |
779 | ||
780 | /* | |
781 | * If we are past the EOF, then we need to make sure as | |
782 | * soon as we find a hole that the last extent we found | |
783 | * is marked with FIEMAP_EXTENT_LAST | |
784 | */ | |
785 | if (!past_eof && logical + size >= isize) | |
786 | past_eof = true; | |
787 | } | |
788 | cond_resched(); | |
789 | if (fatal_signal_pending(current)) | |
790 | ret = -EINTR; | |
791 | else | |
792 | goto next; | |
793 | out: | |
794 | if (ret == 1) | |
795 | ret = 0; | |
796 | ||
797 | mutex_unlock(&inode->i_mutex); | |
798 | return ret; | |
9ab70134 JK |
799 | } |
800 | ||
f1e88660 JK |
801 | /* |
802 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
803 | * Major change was from block_size == page_size in f2fs by default. | |
804 | */ | |
805 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
806 | struct list_head *pages, struct page *page, | |
807 | unsigned nr_pages) | |
808 | { | |
809 | struct bio *bio = NULL; | |
810 | unsigned page_idx; | |
811 | sector_t last_block_in_bio = 0; | |
812 | struct inode *inode = mapping->host; | |
813 | const unsigned blkbits = inode->i_blkbits; | |
814 | const unsigned blocksize = 1 << blkbits; | |
815 | sector_t block_in_file; | |
816 | sector_t last_block; | |
817 | sector_t last_block_in_file; | |
818 | sector_t block_nr; | |
819 | struct block_device *bdev = inode->i_sb->s_bdev; | |
820 | struct f2fs_map_blocks map; | |
821 | ||
822 | map.m_pblk = 0; | |
823 | map.m_lblk = 0; | |
824 | map.m_len = 0; | |
825 | map.m_flags = 0; | |
826 | ||
827 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
828 | ||
829 | prefetchw(&page->flags); | |
830 | if (pages) { | |
831 | page = list_entry(pages->prev, struct page, lru); | |
832 | list_del(&page->lru); | |
833 | if (add_to_page_cache_lru(page, mapping, | |
834 | page->index, GFP_KERNEL)) | |
835 | goto next_page; | |
836 | } | |
837 | ||
838 | block_in_file = (sector_t)page->index; | |
839 | last_block = block_in_file + nr_pages; | |
840 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
841 | blkbits; | |
842 | if (last_block > last_block_in_file) | |
843 | last_block = last_block_in_file; | |
844 | ||
845 | /* | |
846 | * Map blocks using the previous result first. | |
847 | */ | |
848 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
849 | block_in_file > map.m_lblk && | |
850 | block_in_file < (map.m_lblk + map.m_len)) | |
851 | goto got_it; | |
852 | ||
853 | /* | |
854 | * Then do more f2fs_map_blocks() calls until we are | |
855 | * done with this page. | |
856 | */ | |
857 | map.m_flags = 0; | |
858 | ||
859 | if (block_in_file < last_block) { | |
860 | map.m_lblk = block_in_file; | |
861 | map.m_len = last_block - block_in_file; | |
862 | ||
863 | if (f2fs_map_blocks(inode, &map, 0, false)) | |
864 | goto set_error_page; | |
865 | } | |
866 | got_it: | |
867 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
868 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
869 | SetPageMappedToDisk(page); | |
870 | ||
871 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
872 | SetPageUptodate(page); | |
873 | goto confused; | |
874 | } | |
875 | } else { | |
876 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
877 | SetPageUptodate(page); | |
878 | unlock_page(page); | |
879 | goto next_page; | |
880 | } | |
881 | ||
882 | /* | |
883 | * This page will go to BIO. Do we need to send this | |
884 | * BIO off first? | |
885 | */ | |
886 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
887 | submit_and_realloc: | |
888 | submit_bio(READ, bio); | |
889 | bio = NULL; | |
890 | } | |
891 | if (bio == NULL) { | |
4375a336 JK |
892 | struct f2fs_crypto_ctx *ctx = NULL; |
893 | ||
894 | if (f2fs_encrypted_inode(inode) && | |
895 | S_ISREG(inode->i_mode)) { | |
896 | struct page *cpage; | |
897 | ||
898 | ctx = f2fs_get_crypto_ctx(inode); | |
899 | if (IS_ERR(ctx)) | |
900 | goto set_error_page; | |
901 | ||
902 | /* wait the page to be moved by cleaning */ | |
903 | cpage = find_lock_page( | |
904 | META_MAPPING(F2FS_I_SB(inode)), | |
905 | block_nr); | |
906 | if (cpage) { | |
907 | f2fs_wait_on_page_writeback(cpage, | |
908 | DATA); | |
909 | f2fs_put_page(cpage, 1); | |
910 | } | |
911 | } | |
912 | ||
f1e88660 JK |
913 | bio = bio_alloc(GFP_KERNEL, |
914 | min_t(int, nr_pages, bio_get_nr_vecs(bdev))); | |
4375a336 JK |
915 | if (!bio) { |
916 | if (ctx) | |
917 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 918 | goto set_error_page; |
4375a336 | 919 | } |
f1e88660 JK |
920 | bio->bi_bdev = bdev; |
921 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 922 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 923 | bio->bi_private = ctx; |
f1e88660 JK |
924 | } |
925 | ||
926 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
927 | goto submit_and_realloc; | |
928 | ||
929 | last_block_in_bio = block_nr; | |
930 | goto next_page; | |
931 | set_error_page: | |
932 | SetPageError(page); | |
933 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
934 | unlock_page(page); | |
935 | goto next_page; | |
936 | confused: | |
937 | if (bio) { | |
938 | submit_bio(READ, bio); | |
939 | bio = NULL; | |
940 | } | |
941 | unlock_page(page); | |
942 | next_page: | |
943 | if (pages) | |
944 | page_cache_release(page); | |
945 | } | |
946 | BUG_ON(pages && !list_empty(pages)); | |
947 | if (bio) | |
948 | submit_bio(READ, bio); | |
949 | return 0; | |
950 | } | |
951 | ||
eb47b800 JK |
952 | static int f2fs_read_data_page(struct file *file, struct page *page) |
953 | { | |
9ffe0fb5 | 954 | struct inode *inode = page->mapping->host; |
b3d208f9 | 955 | int ret = -EAGAIN; |
9ffe0fb5 | 956 | |
c20e89cd CY |
957 | trace_f2fs_readpage(page, DATA); |
958 | ||
e1c42045 | 959 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
960 | if (f2fs_has_inline_data(inode)) |
961 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 962 | if (ret == -EAGAIN) |
f1e88660 | 963 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 964 | return ret; |
eb47b800 JK |
965 | } |
966 | ||
967 | static int f2fs_read_data_pages(struct file *file, | |
968 | struct address_space *mapping, | |
969 | struct list_head *pages, unsigned nr_pages) | |
970 | { | |
9ffe0fb5 HL |
971 | struct inode *inode = file->f_mapping->host; |
972 | ||
973 | /* If the file has inline data, skip readpages */ | |
974 | if (f2fs_has_inline_data(inode)) | |
975 | return 0; | |
976 | ||
f1e88660 | 977 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
978 | } |
979 | ||
05ca3632 | 980 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 981 | { |
05ca3632 | 982 | struct page *page = fio->page; |
eb47b800 | 983 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
984 | struct dnode_of_data dn; |
985 | int err = 0; | |
986 | ||
987 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 988 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
989 | if (err) |
990 | return err; | |
991 | ||
cf04e8eb | 992 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
993 | |
994 | /* This page is already truncated */ | |
2bca1e23 JK |
995 | if (fio->blk_addr == NULL_ADDR) { |
996 | ClearPageUptodate(page); | |
eb47b800 | 997 | goto out_writepage; |
2bca1e23 | 998 | } |
eb47b800 | 999 | |
4375a336 JK |
1000 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
1001 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); | |
1002 | if (IS_ERR(fio->encrypted_page)) { | |
1003 | err = PTR_ERR(fio->encrypted_page); | |
1004 | goto out_writepage; | |
1005 | } | |
1006 | } | |
1007 | ||
eb47b800 JK |
1008 | set_page_writeback(page); |
1009 | ||
1010 | /* | |
1011 | * If current allocation needs SSR, | |
1012 | * it had better in-place writes for updated data. | |
1013 | */ | |
cf04e8eb | 1014 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 HL |
1015 | !is_cold_data(page) && |
1016 | need_inplace_update(inode))) { | |
05ca3632 | 1017 | rewrite_data_page(fio); |
fff04f90 | 1018 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1019 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1020 | } else { |
05ca3632 | 1021 | write_data_page(&dn, fio); |
216a620a | 1022 | set_data_blkaddr(&dn); |
7e4dde79 | 1023 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1024 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1025 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1026 | if (page->index == 0) |
1027 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1028 | } |
1029 | out_writepage: | |
1030 | f2fs_put_dnode(&dn); | |
1031 | return err; | |
1032 | } | |
1033 | ||
1034 | static int f2fs_write_data_page(struct page *page, | |
1035 | struct writeback_control *wbc) | |
1036 | { | |
1037 | struct inode *inode = page->mapping->host; | |
4081363f | 1038 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1039 | loff_t i_size = i_size_read(inode); |
1040 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1041 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1042 | unsigned offset = 0; |
39936837 | 1043 | bool need_balance_fs = false; |
eb47b800 | 1044 | int err = 0; |
458e6197 | 1045 | struct f2fs_io_info fio = { |
05ca3632 | 1046 | .sbi = sbi, |
458e6197 | 1047 | .type = DATA, |
6c311ec6 | 1048 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1049 | .page = page, |
4375a336 | 1050 | .encrypted_page = NULL, |
458e6197 | 1051 | }; |
eb47b800 | 1052 | |
ecda0de3 CY |
1053 | trace_f2fs_writepage(page, DATA); |
1054 | ||
eb47b800 | 1055 | if (page->index < end_index) |
39936837 | 1056 | goto write; |
eb47b800 JK |
1057 | |
1058 | /* | |
1059 | * If the offset is out-of-range of file size, | |
1060 | * this page does not have to be written to disk. | |
1061 | */ | |
1062 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1063 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1064 | goto out; |
eb47b800 JK |
1065 | |
1066 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1067 | write: |
caf0047e | 1068 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1069 | goto redirty_out; |
1e84371f JK |
1070 | if (f2fs_is_drop_cache(inode)) |
1071 | goto out; | |
1072 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1073 | available_free_memory(sbi, BASE_CHECK)) | |
1074 | goto redirty_out; | |
eb47b800 | 1075 | |
39936837 | 1076 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1077 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1078 | if (unlikely(f2fs_cp_error(sbi))) |
1079 | goto redirty_out; | |
05ca3632 | 1080 | err = do_write_data_page(&fio); |
8618b881 JK |
1081 | goto done; |
1082 | } | |
9ffe0fb5 | 1083 | |
cf779cab JK |
1084 | /* we should bypass data pages to proceed the kworkder jobs */ |
1085 | if (unlikely(f2fs_cp_error(sbi))) { | |
1086 | SetPageError(page); | |
a7ffdbe2 | 1087 | goto out; |
cf779cab JK |
1088 | } |
1089 | ||
8618b881 | 1090 | if (!wbc->for_reclaim) |
39936837 | 1091 | need_balance_fs = true; |
8618b881 | 1092 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1093 | goto redirty_out; |
eb47b800 | 1094 | |
b3d208f9 | 1095 | err = -EAGAIN; |
8618b881 | 1096 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1097 | if (f2fs_has_inline_data(inode)) |
1098 | err = f2fs_write_inline_data(inode, page); | |
1099 | if (err == -EAGAIN) | |
05ca3632 | 1100 | err = do_write_data_page(&fio); |
8618b881 JK |
1101 | f2fs_unlock_op(sbi); |
1102 | done: | |
1103 | if (err && err != -ENOENT) | |
1104 | goto redirty_out; | |
eb47b800 | 1105 | |
eb47b800 | 1106 | clear_cold_data(page); |
39936837 | 1107 | out: |
a7ffdbe2 | 1108 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1109 | if (err) |
1110 | ClearPageUptodate(page); | |
eb47b800 | 1111 | unlock_page(page); |
39936837 | 1112 | if (need_balance_fs) |
eb47b800 | 1113 | f2fs_balance_fs(sbi); |
2aea39ec JK |
1114 | if (wbc->for_reclaim) |
1115 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
1116 | return 0; |
1117 | ||
eb47b800 | 1118 | redirty_out: |
76f60268 | 1119 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1120 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1121 | } |
1122 | ||
fa9150a8 NJ |
1123 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1124 | void *data) | |
1125 | { | |
1126 | struct address_space *mapping = data; | |
1127 | int ret = mapping->a_ops->writepage(page, wbc); | |
1128 | mapping_set_error(mapping, ret); | |
1129 | return ret; | |
1130 | } | |
1131 | ||
8f46dcae CY |
1132 | /* |
1133 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1134 | * The major change is making write step of cold data page separately from | |
1135 | * warm/hot data page. | |
1136 | */ | |
1137 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1138 | struct writeback_control *wbc, writepage_t writepage, | |
1139 | void *data) | |
1140 | { | |
1141 | int ret = 0; | |
1142 | int done = 0; | |
1143 | struct pagevec pvec; | |
1144 | int nr_pages; | |
1145 | pgoff_t uninitialized_var(writeback_index); | |
1146 | pgoff_t index; | |
1147 | pgoff_t end; /* Inclusive */ | |
1148 | pgoff_t done_index; | |
1149 | int cycled; | |
1150 | int range_whole = 0; | |
1151 | int tag; | |
1152 | int step = 0; | |
1153 | ||
1154 | pagevec_init(&pvec, 0); | |
1155 | next: | |
1156 | if (wbc->range_cyclic) { | |
1157 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1158 | index = writeback_index; | |
1159 | if (index == 0) | |
1160 | cycled = 1; | |
1161 | else | |
1162 | cycled = 0; | |
1163 | end = -1; | |
1164 | } else { | |
1165 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1166 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1167 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1168 | range_whole = 1; | |
1169 | cycled = 1; /* ignore range_cyclic tests */ | |
1170 | } | |
1171 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1172 | tag = PAGECACHE_TAG_TOWRITE; | |
1173 | else | |
1174 | tag = PAGECACHE_TAG_DIRTY; | |
1175 | retry: | |
1176 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1177 | tag_pages_for_writeback(mapping, index, end); | |
1178 | done_index = index; | |
1179 | while (!done && (index <= end)) { | |
1180 | int i; | |
1181 | ||
1182 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1183 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1184 | if (nr_pages == 0) | |
1185 | break; | |
1186 | ||
1187 | for (i = 0; i < nr_pages; i++) { | |
1188 | struct page *page = pvec.pages[i]; | |
1189 | ||
1190 | if (page->index > end) { | |
1191 | done = 1; | |
1192 | break; | |
1193 | } | |
1194 | ||
1195 | done_index = page->index; | |
1196 | ||
1197 | lock_page(page); | |
1198 | ||
1199 | if (unlikely(page->mapping != mapping)) { | |
1200 | continue_unlock: | |
1201 | unlock_page(page); | |
1202 | continue; | |
1203 | } | |
1204 | ||
1205 | if (!PageDirty(page)) { | |
1206 | /* someone wrote it for us */ | |
1207 | goto continue_unlock; | |
1208 | } | |
1209 | ||
1210 | if (step == 0 && !is_cold_data(page)) | |
1211 | goto continue_unlock; | |
1212 | if (step == 1 && is_cold_data(page)) | |
1213 | goto continue_unlock; | |
1214 | ||
1215 | if (PageWriteback(page)) { | |
1216 | if (wbc->sync_mode != WB_SYNC_NONE) | |
1217 | f2fs_wait_on_page_writeback(page, DATA); | |
1218 | else | |
1219 | goto continue_unlock; | |
1220 | } | |
1221 | ||
1222 | BUG_ON(PageWriteback(page)); | |
1223 | if (!clear_page_dirty_for_io(page)) | |
1224 | goto continue_unlock; | |
1225 | ||
1226 | ret = (*writepage)(page, wbc, data); | |
1227 | if (unlikely(ret)) { | |
1228 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1229 | unlock_page(page); | |
1230 | ret = 0; | |
1231 | } else { | |
1232 | done_index = page->index + 1; | |
1233 | done = 1; | |
1234 | break; | |
1235 | } | |
1236 | } | |
1237 | ||
1238 | if (--wbc->nr_to_write <= 0 && | |
1239 | wbc->sync_mode == WB_SYNC_NONE) { | |
1240 | done = 1; | |
1241 | break; | |
1242 | } | |
1243 | } | |
1244 | pagevec_release(&pvec); | |
1245 | cond_resched(); | |
1246 | } | |
1247 | ||
1248 | if (step < 1) { | |
1249 | step++; | |
1250 | goto next; | |
1251 | } | |
1252 | ||
1253 | if (!cycled && !done) { | |
1254 | cycled = 1; | |
1255 | index = 0; | |
1256 | end = writeback_index - 1; | |
1257 | goto retry; | |
1258 | } | |
1259 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1260 | mapping->writeback_index = done_index; | |
1261 | ||
1262 | return ret; | |
1263 | } | |
1264 | ||
25ca923b | 1265 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1266 | struct writeback_control *wbc) |
1267 | { | |
1268 | struct inode *inode = mapping->host; | |
4081363f | 1269 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1270 | bool locked = false; |
eb47b800 | 1271 | int ret; |
50c8cdb3 | 1272 | long diff; |
eb47b800 | 1273 | |
e5748434 CY |
1274 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1275 | ||
cfb185a1 | 1276 | /* deal with chardevs and other special file */ |
1277 | if (!mapping->a_ops->writepage) | |
1278 | return 0; | |
1279 | ||
87d6f890 | 1280 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
a7ffdbe2 | 1281 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && |
6fb03f3a | 1282 | available_free_memory(sbi, DIRTY_DENTS)) |
d3baf95d | 1283 | goto skip_write; |
87d6f890 | 1284 | |
d5669f7b JK |
1285 | /* during POR, we don't need to trigger writepage at all. */ |
1286 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1287 | goto skip_write; | |
1288 | ||
50c8cdb3 | 1289 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1290 | |
5463e7c1 JK |
1291 | if (!S_ISDIR(inode->i_mode)) { |
1292 | mutex_lock(&sbi->writepages); | |
1293 | locked = true; | |
1294 | } | |
8f46dcae | 1295 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
bb96a8d5 | 1296 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
5463e7c1 JK |
1297 | if (locked) |
1298 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1299 | |
eb47b800 JK |
1300 | remove_dirty_dir_inode(inode); |
1301 | ||
50c8cdb3 | 1302 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1303 | return ret; |
d3baf95d JK |
1304 | |
1305 | skip_write: | |
a7ffdbe2 | 1306 | wbc->pages_skipped += get_dirty_pages(inode); |
d3baf95d | 1307 | return 0; |
eb47b800 JK |
1308 | } |
1309 | ||
3aab8f82 CY |
1310 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1311 | { | |
1312 | struct inode *inode = mapping->host; | |
1313 | ||
1314 | if (to > inode->i_size) { | |
1315 | truncate_pagecache(inode, inode->i_size); | |
764aa3e9 | 1316 | truncate_blocks(inode, inode->i_size, true); |
3aab8f82 CY |
1317 | } |
1318 | } | |
1319 | ||
eb47b800 JK |
1320 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1321 | loff_t pos, unsigned len, unsigned flags, | |
1322 | struct page **pagep, void **fsdata) | |
1323 | { | |
1324 | struct inode *inode = mapping->host; | |
4081363f | 1325 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b JK |
1326 | struct page *page = NULL; |
1327 | struct page *ipage; | |
eb47b800 JK |
1328 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
1329 | struct dnode_of_data dn; | |
1330 | int err = 0; | |
1331 | ||
62aed044 CY |
1332 | trace_f2fs_write_begin(inode, pos, len, flags); |
1333 | ||
eb47b800 | 1334 | f2fs_balance_fs(sbi); |
5f727395 JK |
1335 | |
1336 | /* | |
1337 | * We should check this at this moment to avoid deadlock on inode page | |
1338 | * and #0 page. The locking rule for inline_data conversion should be: | |
1339 | * lock_page(page #0) -> lock_page(inode_page) | |
1340 | */ | |
1341 | if (index != 0) { | |
1342 | err = f2fs_convert_inline_inode(inode); | |
1343 | if (err) | |
1344 | goto fail; | |
1345 | } | |
afcb7ca0 | 1346 | repeat: |
eb47b800 | 1347 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1348 | if (!page) { |
1349 | err = -ENOMEM; | |
1350 | goto fail; | |
1351 | } | |
d5f66990 | 1352 | |
eb47b800 JK |
1353 | *pagep = page; |
1354 | ||
e479556b | 1355 | f2fs_lock_op(sbi); |
9ba69cf9 JK |
1356 | |
1357 | /* check inline_data */ | |
1358 | ipage = get_node_page(sbi, inode->i_ino); | |
cd34e296 CY |
1359 | if (IS_ERR(ipage)) { |
1360 | err = PTR_ERR(ipage); | |
9ba69cf9 | 1361 | goto unlock_fail; |
cd34e296 | 1362 | } |
9ba69cf9 | 1363 | |
b3d208f9 JK |
1364 | set_new_dnode(&dn, inode, ipage, ipage, 0); |
1365 | ||
9ba69cf9 | 1366 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 JK |
1367 | if (pos + len <= MAX_INLINE_DATA) { |
1368 | read_inline_data(page, ipage); | |
1369 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
1370 | sync_inode_page(&dn); | |
1371 | goto put_next; | |
b3d208f9 | 1372 | } |
5f727395 JK |
1373 | err = f2fs_convert_inline_page(&dn, page); |
1374 | if (err) | |
1375 | goto put_fail; | |
b600965c | 1376 | } |
9ba69cf9 JK |
1377 | err = f2fs_reserve_block(&dn, index); |
1378 | if (err) | |
8cdcb713 | 1379 | goto put_fail; |
b3d208f9 | 1380 | put_next: |
9ba69cf9 JK |
1381 | f2fs_put_dnode(&dn); |
1382 | f2fs_unlock_op(sbi); | |
1383 | ||
90d4388a CY |
1384 | if (len == PAGE_CACHE_SIZE) |
1385 | goto out_update; | |
1386 | if (PageUptodate(page)) | |
1387 | goto out_clear; | |
eb47b800 | 1388 | |
b3d208f9 JK |
1389 | f2fs_wait_on_page_writeback(page, DATA); |
1390 | ||
eb47b800 JK |
1391 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { |
1392 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1393 | unsigned end = start + len; | |
1394 | ||
1395 | /* Reading beyond i_size is simple: memset to zero */ | |
1396 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
90d4388a | 1397 | goto out_update; |
eb47b800 JK |
1398 | } |
1399 | ||
b3d208f9 | 1400 | if (dn.data_blkaddr == NEW_ADDR) { |
eb47b800 JK |
1401 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1402 | } else { | |
cf04e8eb | 1403 | struct f2fs_io_info fio = { |
05ca3632 | 1404 | .sbi = sbi, |
cf04e8eb JK |
1405 | .type = DATA, |
1406 | .rw = READ_SYNC, | |
1407 | .blk_addr = dn.data_blkaddr, | |
05ca3632 | 1408 | .page = page, |
4375a336 | 1409 | .encrypted_page = NULL, |
cf04e8eb | 1410 | }; |
05ca3632 | 1411 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1412 | if (err) |
1413 | goto fail; | |
d54c795b | 1414 | |
393ff91f | 1415 | lock_page(page); |
6bacf52f | 1416 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1417 | err = -EIO; |
1418 | goto fail; | |
eb47b800 | 1419 | } |
6bacf52f | 1420 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1421 | f2fs_put_page(page, 1); |
1422 | goto repeat; | |
eb47b800 | 1423 | } |
4375a336 JK |
1424 | |
1425 | /* avoid symlink page */ | |
1426 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1427 | err = f2fs_decrypt_one(inode, page); | |
86531d6b | 1428 | if (err) |
4375a336 | 1429 | goto fail; |
4375a336 | 1430 | } |
eb47b800 | 1431 | } |
90d4388a | 1432 | out_update: |
eb47b800 | 1433 | SetPageUptodate(page); |
90d4388a | 1434 | out_clear: |
eb47b800 JK |
1435 | clear_cold_data(page); |
1436 | return 0; | |
9ba69cf9 | 1437 | |
8cdcb713 JK |
1438 | put_fail: |
1439 | f2fs_put_dnode(&dn); | |
9ba69cf9 JK |
1440 | unlock_fail: |
1441 | f2fs_unlock_op(sbi); | |
3aab8f82 | 1442 | fail: |
86531d6b | 1443 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1444 | f2fs_write_failed(mapping, pos + len); |
1445 | return err; | |
eb47b800 JK |
1446 | } |
1447 | ||
a1dd3c13 JK |
1448 | static int f2fs_write_end(struct file *file, |
1449 | struct address_space *mapping, | |
1450 | loff_t pos, unsigned len, unsigned copied, | |
1451 | struct page *page, void *fsdata) | |
1452 | { | |
1453 | struct inode *inode = page->mapping->host; | |
1454 | ||
dfb2bf38 CY |
1455 | trace_f2fs_write_end(inode, pos, len, copied); |
1456 | ||
34ba94ba | 1457 | set_page_dirty(page); |
a1dd3c13 JK |
1458 | |
1459 | if (pos + copied > i_size_read(inode)) { | |
1460 | i_size_write(inode, pos + copied); | |
1461 | mark_inode_dirty(inode); | |
1462 | update_inode_page(inode); | |
1463 | } | |
1464 | ||
75c3c8bc | 1465 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
1466 | return copied; |
1467 | } | |
1468 | ||
6f673763 OS |
1469 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1470 | loff_t offset) | |
944fcfc1 JK |
1471 | { |
1472 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1473 | |
6f673763 | 1474 | if (iov_iter_rw(iter) == READ) |
944fcfc1 JK |
1475 | return 0; |
1476 | ||
1477 | if (offset & blocksize_mask) | |
1478 | return -EINVAL; | |
1479 | ||
5b46f25d AV |
1480 | if (iov_iter_alignment(iter) & blocksize_mask) |
1481 | return -EINVAL; | |
1482 | ||
944fcfc1 JK |
1483 | return 0; |
1484 | } | |
1485 | ||
22c6186e OS |
1486 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1487 | loff_t offset) | |
eb47b800 JK |
1488 | { |
1489 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1490 | struct address_space *mapping = file->f_mapping; |
1491 | struct inode *inode = mapping->host; | |
1492 | size_t count = iov_iter_count(iter); | |
1493 | int err; | |
944fcfc1 | 1494 | |
b3d208f9 JK |
1495 | /* we don't need to use inline_data strictly */ |
1496 | if (f2fs_has_inline_data(inode)) { | |
1497 | err = f2fs_convert_inline_inode(inode); | |
1498 | if (err) | |
1499 | return err; | |
1500 | } | |
9ffe0fb5 | 1501 | |
fcc85a4d JK |
1502 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1503 | return 0; | |
1504 | ||
6f673763 | 1505 | if (check_direct_IO(inode, iter, offset)) |
944fcfc1 JK |
1506 | return 0; |
1507 | ||
6f673763 | 1508 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1509 | |
6f673763 | 1510 | if (iov_iter_rw(iter) == WRITE) |
59b802e5 JK |
1511 | __allocate_data_blocks(inode, offset, count); |
1512 | ||
17f8c842 | 1513 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block); |
6f673763 | 1514 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1515 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1516 | |
6f673763 | 1517 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1518 | |
3aab8f82 | 1519 | return err; |
eb47b800 JK |
1520 | } |
1521 | ||
487261f3 CY |
1522 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1523 | unsigned int length) | |
eb47b800 JK |
1524 | { |
1525 | struct inode *inode = page->mapping->host; | |
487261f3 | 1526 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1527 | |
487261f3 CY |
1528 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1529 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1530 | return; |
1531 | ||
487261f3 CY |
1532 | if (PageDirty(page)) { |
1533 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1534 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1535 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1536 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1537 | else | |
1538 | inode_dec_dirty_pages(inode); | |
1539 | } | |
eb47b800 JK |
1540 | ClearPagePrivate(page); |
1541 | } | |
1542 | ||
487261f3 | 1543 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1544 | { |
f68daeeb JK |
1545 | /* If this is dirty page, keep PagePrivate */ |
1546 | if (PageDirty(page)) | |
1547 | return 0; | |
1548 | ||
eb47b800 | 1549 | ClearPagePrivate(page); |
c3850aa1 | 1550 | return 1; |
eb47b800 JK |
1551 | } |
1552 | ||
1553 | static int f2fs_set_data_page_dirty(struct page *page) | |
1554 | { | |
1555 | struct address_space *mapping = page->mapping; | |
1556 | struct inode *inode = mapping->host; | |
1557 | ||
26c6b887 JK |
1558 | trace_f2fs_set_page_dirty(page, DATA); |
1559 | ||
eb47b800 | 1560 | SetPageUptodate(page); |
34ba94ba | 1561 | |
1e84371f | 1562 | if (f2fs_is_atomic_file(inode)) { |
34ba94ba JK |
1563 | register_inmem_page(inode, page); |
1564 | return 1; | |
1565 | } | |
1566 | ||
eb47b800 JK |
1567 | if (!PageDirty(page)) { |
1568 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1569 | update_dirty_page(inode, page); |
eb47b800 JK |
1570 | return 1; |
1571 | } | |
1572 | return 0; | |
1573 | } | |
1574 | ||
c01e54b7 JK |
1575 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1576 | { | |
454ae7e5 CY |
1577 | struct inode *inode = mapping->host; |
1578 | ||
b3d208f9 JK |
1579 | /* we don't need to use inline_data strictly */ |
1580 | if (f2fs_has_inline_data(inode)) { | |
1581 | int err = f2fs_convert_inline_inode(inode); | |
1582 | if (err) | |
1583 | return err; | |
1584 | } | |
bfad7c2d | 1585 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1586 | } |
1587 | ||
eb47b800 JK |
1588 | const struct address_space_operations f2fs_dblock_aops = { |
1589 | .readpage = f2fs_read_data_page, | |
1590 | .readpages = f2fs_read_data_pages, | |
1591 | .writepage = f2fs_write_data_page, | |
1592 | .writepages = f2fs_write_data_pages, | |
1593 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1594 | .write_end = f2fs_write_end, |
eb47b800 | 1595 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1596 | .invalidatepage = f2fs_invalidate_page, |
1597 | .releasepage = f2fs_release_page, | |
eb47b800 | 1598 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1599 | .bmap = f2fs_bmap, |
eb47b800 | 1600 | }; |