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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(). | |
470f00e9 CY |
391 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
392 | * ipage should be released by this function. | |
eb47b800 | 393 | */ |
64aa7ed9 | 394 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 395 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 396 | { |
eb47b800 JK |
397 | struct address_space *mapping = inode->i_mapping; |
398 | struct page *page; | |
399 | struct dnode_of_data dn; | |
400 | int err; | |
01f28610 JK |
401 | repeat: |
402 | page = grab_cache_page(mapping, index); | |
470f00e9 CY |
403 | if (!page) { |
404 | /* | |
405 | * before exiting, we should make sure ipage will be released | |
406 | * if any error occur. | |
407 | */ | |
408 | f2fs_put_page(ipage, 1); | |
01f28610 | 409 | return ERR_PTR(-ENOMEM); |
470f00e9 | 410 | } |
eb47b800 | 411 | |
a8865372 | 412 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 413 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
414 | if (err) { |
415 | f2fs_put_page(page, 1); | |
eb47b800 | 416 | return ERR_PTR(err); |
a8865372 | 417 | } |
01f28610 JK |
418 | if (!ipage) |
419 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
420 | |
421 | if (PageUptodate(page)) | |
01f28610 | 422 | goto got_it; |
eb47b800 JK |
423 | |
424 | if (dn.data_blkaddr == NEW_ADDR) { | |
425 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 426 | SetPageUptodate(page); |
eb47b800 | 427 | } else { |
4375a336 | 428 | f2fs_put_page(page, 1); |
a8865372 | 429 | |
4375a336 JK |
430 | page = get_read_data_page(inode, index, READ_SYNC); |
431 | if (IS_ERR(page)) | |
afcb7ca0 | 432 | goto repeat; |
4375a336 JK |
433 | |
434 | /* wait for read completion */ | |
435 | lock_page(page); | |
eb47b800 | 436 | } |
01f28610 | 437 | got_it: |
eb47b800 JK |
438 | if (new_i_size && |
439 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
440 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
441 | /* Only the directory inode sets new_i_size */ |
442 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
443 | } |
444 | return page; | |
445 | } | |
446 | ||
bfad7c2d JK |
447 | static int __allocate_data_block(struct dnode_of_data *dn) |
448 | { | |
4081363f | 449 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
976e4c50 | 450 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); |
bfad7c2d | 451 | struct f2fs_summary sum; |
bfad7c2d | 452 | struct node_info ni; |
38aa0889 | 453 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 454 | pgoff_t fofs; |
bfad7c2d JK |
455 | |
456 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
457 | return -EPERM; | |
df6136ef CY |
458 | |
459 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
460 | if (dn->data_blkaddr == NEW_ADDR) | |
461 | goto alloc; | |
462 | ||
bfad7c2d JK |
463 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
464 | return -ENOSPC; | |
465 | ||
df6136ef | 466 | alloc: |
bfad7c2d JK |
467 | get_node_info(sbi, dn->nid, &ni); |
468 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
469 | ||
38aa0889 JK |
470 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
471 | seg = CURSEG_DIRECT_IO; | |
472 | ||
df6136ef CY |
473 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
474 | &sum, seg); | |
216a620a | 475 | set_data_blkaddr(dn); |
bfad7c2d | 476 | |
976e4c50 JK |
477 | /* update i_size */ |
478 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + | |
479 | dn->ofs_in_node; | |
480 | if (i_size_read(dn->inode) < ((fofs + 1) << PAGE_CACHE_SHIFT)) | |
481 | i_size_write(dn->inode, ((fofs + 1) << PAGE_CACHE_SHIFT)); | |
482 | ||
3e72f721 | 483 | /* direct IO doesn't use extent cache to maximize the performance */ |
a28ef1f5 | 484 | f2fs_drop_largest_extent(dn->inode, fofs); |
3e72f721 | 485 | |
bfad7c2d JK |
486 | return 0; |
487 | } | |
488 | ||
59b802e5 JK |
489 | static void __allocate_data_blocks(struct inode *inode, loff_t offset, |
490 | size_t count) | |
491 | { | |
492 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
493 | struct dnode_of_data dn; | |
494 | u64 start = F2FS_BYTES_TO_BLK(offset); | |
495 | u64 len = F2FS_BYTES_TO_BLK(count); | |
496 | bool allocated; | |
497 | u64 end_offset; | |
498 | ||
499 | while (len) { | |
500 | f2fs_balance_fs(sbi); | |
501 | f2fs_lock_op(sbi); | |
502 | ||
503 | /* When reading holes, we need its node page */ | |
504 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
505 | if (get_dnode_of_data(&dn, start, ALLOC_NODE)) | |
506 | goto out; | |
507 | ||
508 | allocated = false; | |
509 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); | |
510 | ||
511 | while (dn.ofs_in_node < end_offset && len) { | |
d6d4f1cb CY |
512 | block_t blkaddr; |
513 | ||
514 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
df6136ef | 515 | if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) { |
59b802e5 JK |
516 | if (__allocate_data_block(&dn)) |
517 | goto sync_out; | |
518 | allocated = true; | |
519 | } | |
520 | len--; | |
521 | start++; | |
522 | dn.ofs_in_node++; | |
523 | } | |
524 | ||
525 | if (allocated) | |
526 | sync_inode_page(&dn); | |
527 | ||
528 | f2fs_put_dnode(&dn); | |
529 | f2fs_unlock_op(sbi); | |
530 | } | |
531 | return; | |
532 | ||
533 | sync_out: | |
534 | if (allocated) | |
535 | sync_inode_page(&dn); | |
536 | f2fs_put_dnode(&dn); | |
537 | out: | |
538 | f2fs_unlock_op(sbi); | |
539 | return; | |
540 | } | |
541 | ||
0a8165d7 | 542 | /* |
003a3e1d JK |
543 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
544 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
545 | * If original data blocks are allocated, then give them to blockdev. |
546 | * Otherwise, | |
547 | * a. preallocate requested block addresses | |
548 | * b. do not use extent cache for better performance | |
549 | * c. give the block addresses to blockdev | |
eb47b800 | 550 | */ |
003a3e1d JK |
551 | static int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
552 | int create, bool fiemap) | |
eb47b800 | 553 | { |
003a3e1d | 554 | unsigned int maxblocks = map->m_len; |
eb47b800 | 555 | struct dnode_of_data dn; |
bfad7c2d JK |
556 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
557 | pgoff_t pgofs, end_offset; | |
558 | int err = 0, ofs = 1; | |
a2e7d1bf | 559 | struct extent_info ei; |
bfad7c2d | 560 | bool allocated = false; |
eb47b800 | 561 | |
003a3e1d JK |
562 | map->m_len = 0; |
563 | map->m_flags = 0; | |
564 | ||
565 | /* it only supports block size == page size */ | |
566 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 567 | |
7e4dde79 | 568 | if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
569 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
570 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
571 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 572 | goto out; |
a2e7d1bf | 573 | } |
bfad7c2d | 574 | |
59b802e5 | 575 | if (create) |
4081363f | 576 | f2fs_lock_op(F2FS_I_SB(inode)); |
eb47b800 JK |
577 | |
578 | /* When reading holes, we need its node page */ | |
579 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 580 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 581 | if (err) { |
bfad7c2d JK |
582 | if (err == -ENOENT) |
583 | err = 0; | |
584 | goto unlock_out; | |
848753aa | 585 | } |
ccfb3000 | 586 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 | 587 | goto put_out; |
eb47b800 | 588 | |
bfad7c2d | 589 | if (dn.data_blkaddr != NULL_ADDR) { |
003a3e1d JK |
590 | map->m_flags = F2FS_MAP_MAPPED; |
591 | map->m_pblk = dn.data_blkaddr; | |
7f63eb77 JK |
592 | if (dn.data_blkaddr == NEW_ADDR) |
593 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
bfad7c2d JK |
594 | } else if (create) { |
595 | err = __allocate_data_block(&dn); | |
596 | if (err) | |
597 | goto put_out; | |
598 | allocated = true; | |
003a3e1d JK |
599 | map->m_flags = F2FS_MAP_NEW | F2FS_MAP_MAPPED; |
600 | map->m_pblk = dn.data_blkaddr; | |
bfad7c2d JK |
601 | } else { |
602 | goto put_out; | |
603 | } | |
604 | ||
6403eb1f | 605 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
003a3e1d | 606 | map->m_len = 1; |
bfad7c2d JK |
607 | dn.ofs_in_node++; |
608 | pgofs++; | |
609 | ||
610 | get_next: | |
611 | if (dn.ofs_in_node >= end_offset) { | |
612 | if (allocated) | |
613 | sync_inode_page(&dn); | |
614 | allocated = false; | |
615 | f2fs_put_dnode(&dn); | |
616 | ||
617 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
618 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 619 | if (err) { |
bfad7c2d JK |
620 | if (err == -ENOENT) |
621 | err = 0; | |
622 | goto unlock_out; | |
623 | } | |
ccfb3000 | 624 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 JK |
625 | goto put_out; |
626 | ||
6403eb1f | 627 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 628 | } |
eb47b800 | 629 | |
003a3e1d | 630 | if (maxblocks > map->m_len) { |
bfad7c2d JK |
631 | block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
632 | if (blkaddr == NULL_ADDR && create) { | |
633 | err = __allocate_data_block(&dn); | |
634 | if (err) | |
635 | goto sync_out; | |
636 | allocated = true; | |
003a3e1d | 637 | map->m_flags |= F2FS_MAP_NEW; |
bfad7c2d JK |
638 | blkaddr = dn.data_blkaddr; |
639 | } | |
e1c42045 | 640 | /* Give more consecutive addresses for the readahead */ |
7f63eb77 JK |
641 | if ((map->m_pblk != NEW_ADDR && |
642 | blkaddr == (map->m_pblk + ofs)) || | |
643 | (map->m_pblk == NEW_ADDR && | |
644 | blkaddr == NEW_ADDR)) { | |
bfad7c2d JK |
645 | ofs++; |
646 | dn.ofs_in_node++; | |
647 | pgofs++; | |
003a3e1d | 648 | map->m_len++; |
bfad7c2d JK |
649 | goto get_next; |
650 | } | |
eb47b800 | 651 | } |
bfad7c2d JK |
652 | sync_out: |
653 | if (allocated) | |
654 | sync_inode_page(&dn); | |
655 | put_out: | |
eb47b800 | 656 | f2fs_put_dnode(&dn); |
bfad7c2d JK |
657 | unlock_out: |
658 | if (create) | |
4081363f | 659 | f2fs_unlock_op(F2FS_I_SB(inode)); |
bfad7c2d | 660 | out: |
003a3e1d | 661 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 662 | return err; |
eb47b800 JK |
663 | } |
664 | ||
003a3e1d JK |
665 | static int __get_data_block(struct inode *inode, sector_t iblock, |
666 | struct buffer_head *bh, int create, bool fiemap) | |
667 | { | |
668 | struct f2fs_map_blocks map; | |
669 | int ret; | |
670 | ||
671 | map.m_lblk = iblock; | |
672 | map.m_len = bh->b_size >> inode->i_blkbits; | |
673 | ||
674 | ret = f2fs_map_blocks(inode, &map, create, fiemap); | |
675 | if (!ret) { | |
676 | map_bh(bh, inode->i_sb, map.m_pblk); | |
677 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
678 | bh->b_size = map.m_len << inode->i_blkbits; | |
679 | } | |
680 | return ret; | |
681 | } | |
682 | ||
ccfb3000 JK |
683 | static int get_data_block(struct inode *inode, sector_t iblock, |
684 | struct buffer_head *bh_result, int create) | |
685 | { | |
686 | return __get_data_block(inode, iblock, bh_result, create, false); | |
687 | } | |
688 | ||
689 | static int get_data_block_fiemap(struct inode *inode, sector_t iblock, | |
690 | struct buffer_head *bh_result, int create) | |
691 | { | |
692 | return __get_data_block(inode, iblock, bh_result, create, true); | |
693 | } | |
694 | ||
7f63eb77 JK |
695 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
696 | { | |
697 | return (offset >> inode->i_blkbits); | |
698 | } | |
699 | ||
700 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
701 | { | |
702 | return (blk << inode->i_blkbits); | |
703 | } | |
704 | ||
9ab70134 JK |
705 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
706 | u64 start, u64 len) | |
707 | { | |
7f63eb77 JK |
708 | struct buffer_head map_bh; |
709 | sector_t start_blk, last_blk; | |
710 | loff_t isize = i_size_read(inode); | |
711 | u64 logical = 0, phys = 0, size = 0; | |
712 | u32 flags = 0; | |
713 | bool past_eof = false, whole_file = false; | |
714 | int ret = 0; | |
715 | ||
716 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
717 | if (ret) | |
718 | return ret; | |
719 | ||
720 | mutex_lock(&inode->i_mutex); | |
721 | ||
722 | if (len >= isize) { | |
723 | whole_file = true; | |
724 | len = isize; | |
725 | } | |
726 | ||
727 | if (logical_to_blk(inode, len) == 0) | |
728 | len = blk_to_logical(inode, 1); | |
729 | ||
730 | start_blk = logical_to_blk(inode, start); | |
731 | last_blk = logical_to_blk(inode, start + len - 1); | |
732 | next: | |
733 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
734 | map_bh.b_size = len; | |
735 | ||
736 | ret = get_data_block_fiemap(inode, start_blk, &map_bh, 0); | |
737 | if (ret) | |
738 | goto out; | |
739 | ||
740 | /* HOLE */ | |
741 | if (!buffer_mapped(&map_bh)) { | |
742 | start_blk++; | |
743 | ||
744 | if (!past_eof && blk_to_logical(inode, start_blk) >= isize) | |
745 | past_eof = 1; | |
746 | ||
747 | if (past_eof && size) { | |
748 | flags |= FIEMAP_EXTENT_LAST; | |
749 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
750 | phys, size, flags); | |
751 | } else if (size) { | |
752 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
753 | phys, size, flags); | |
754 | size = 0; | |
755 | } | |
756 | ||
757 | /* if we have holes up to/past EOF then we're done */ | |
758 | if (start_blk > last_blk || past_eof || ret) | |
759 | goto out; | |
760 | } else { | |
761 | if (start_blk > last_blk && !whole_file) { | |
762 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
763 | phys, size, flags); | |
764 | goto out; | |
765 | } | |
766 | ||
767 | /* | |
768 | * if size != 0 then we know we already have an extent | |
769 | * to add, so add it. | |
770 | */ | |
771 | if (size) { | |
772 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
773 | phys, size, flags); | |
774 | if (ret) | |
775 | goto out; | |
776 | } | |
777 | ||
778 | logical = blk_to_logical(inode, start_blk); | |
779 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
780 | size = map_bh.b_size; | |
781 | flags = 0; | |
782 | if (buffer_unwritten(&map_bh)) | |
783 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
784 | ||
785 | start_blk += logical_to_blk(inode, size); | |
786 | ||
787 | /* | |
788 | * If we are past the EOF, then we need to make sure as | |
789 | * soon as we find a hole that the last extent we found | |
790 | * is marked with FIEMAP_EXTENT_LAST | |
791 | */ | |
792 | if (!past_eof && logical + size >= isize) | |
793 | past_eof = true; | |
794 | } | |
795 | cond_resched(); | |
796 | if (fatal_signal_pending(current)) | |
797 | ret = -EINTR; | |
798 | else | |
799 | goto next; | |
800 | out: | |
801 | if (ret == 1) | |
802 | ret = 0; | |
803 | ||
804 | mutex_unlock(&inode->i_mutex); | |
805 | return ret; | |
9ab70134 JK |
806 | } |
807 | ||
f1e88660 JK |
808 | /* |
809 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
810 | * Major change was from block_size == page_size in f2fs by default. | |
811 | */ | |
812 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
813 | struct list_head *pages, struct page *page, | |
814 | unsigned nr_pages) | |
815 | { | |
816 | struct bio *bio = NULL; | |
817 | unsigned page_idx; | |
818 | sector_t last_block_in_bio = 0; | |
819 | struct inode *inode = mapping->host; | |
820 | const unsigned blkbits = inode->i_blkbits; | |
821 | const unsigned blocksize = 1 << blkbits; | |
822 | sector_t block_in_file; | |
823 | sector_t last_block; | |
824 | sector_t last_block_in_file; | |
825 | sector_t block_nr; | |
826 | struct block_device *bdev = inode->i_sb->s_bdev; | |
827 | struct f2fs_map_blocks map; | |
828 | ||
829 | map.m_pblk = 0; | |
830 | map.m_lblk = 0; | |
831 | map.m_len = 0; | |
832 | map.m_flags = 0; | |
833 | ||
834 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
835 | ||
836 | prefetchw(&page->flags); | |
837 | if (pages) { | |
838 | page = list_entry(pages->prev, struct page, lru); | |
839 | list_del(&page->lru); | |
840 | if (add_to_page_cache_lru(page, mapping, | |
841 | page->index, GFP_KERNEL)) | |
842 | goto next_page; | |
843 | } | |
844 | ||
845 | block_in_file = (sector_t)page->index; | |
846 | last_block = block_in_file + nr_pages; | |
847 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
848 | blkbits; | |
849 | if (last_block > last_block_in_file) | |
850 | last_block = last_block_in_file; | |
851 | ||
852 | /* | |
853 | * Map blocks using the previous result first. | |
854 | */ | |
855 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
856 | block_in_file > map.m_lblk && | |
857 | block_in_file < (map.m_lblk + map.m_len)) | |
858 | goto got_it; | |
859 | ||
860 | /* | |
861 | * Then do more f2fs_map_blocks() calls until we are | |
862 | * done with this page. | |
863 | */ | |
864 | map.m_flags = 0; | |
865 | ||
866 | if (block_in_file < last_block) { | |
867 | map.m_lblk = block_in_file; | |
868 | map.m_len = last_block - block_in_file; | |
869 | ||
870 | if (f2fs_map_blocks(inode, &map, 0, false)) | |
871 | goto set_error_page; | |
872 | } | |
873 | got_it: | |
874 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
875 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
876 | SetPageMappedToDisk(page); | |
877 | ||
878 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
879 | SetPageUptodate(page); | |
880 | goto confused; | |
881 | } | |
882 | } else { | |
883 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
884 | SetPageUptodate(page); | |
885 | unlock_page(page); | |
886 | goto next_page; | |
887 | } | |
888 | ||
889 | /* | |
890 | * This page will go to BIO. Do we need to send this | |
891 | * BIO off first? | |
892 | */ | |
893 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
894 | submit_and_realloc: | |
895 | submit_bio(READ, bio); | |
896 | bio = NULL; | |
897 | } | |
898 | if (bio == NULL) { | |
4375a336 JK |
899 | struct f2fs_crypto_ctx *ctx = NULL; |
900 | ||
901 | if (f2fs_encrypted_inode(inode) && | |
902 | S_ISREG(inode->i_mode)) { | |
903 | struct page *cpage; | |
904 | ||
905 | ctx = f2fs_get_crypto_ctx(inode); | |
906 | if (IS_ERR(ctx)) | |
907 | goto set_error_page; | |
908 | ||
909 | /* wait the page to be moved by cleaning */ | |
910 | cpage = find_lock_page( | |
911 | META_MAPPING(F2FS_I_SB(inode)), | |
912 | block_nr); | |
913 | if (cpage) { | |
914 | f2fs_wait_on_page_writeback(cpage, | |
915 | DATA); | |
916 | f2fs_put_page(cpage, 1); | |
917 | } | |
918 | } | |
919 | ||
f1e88660 JK |
920 | bio = bio_alloc(GFP_KERNEL, |
921 | min_t(int, nr_pages, bio_get_nr_vecs(bdev))); | |
4375a336 JK |
922 | if (!bio) { |
923 | if (ctx) | |
924 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 925 | goto set_error_page; |
4375a336 | 926 | } |
f1e88660 JK |
927 | bio->bi_bdev = bdev; |
928 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 929 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 930 | bio->bi_private = ctx; |
f1e88660 JK |
931 | } |
932 | ||
933 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
934 | goto submit_and_realloc; | |
935 | ||
936 | last_block_in_bio = block_nr; | |
937 | goto next_page; | |
938 | set_error_page: | |
939 | SetPageError(page); | |
940 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
941 | unlock_page(page); | |
942 | goto next_page; | |
943 | confused: | |
944 | if (bio) { | |
945 | submit_bio(READ, bio); | |
946 | bio = NULL; | |
947 | } | |
948 | unlock_page(page); | |
949 | next_page: | |
950 | if (pages) | |
951 | page_cache_release(page); | |
952 | } | |
953 | BUG_ON(pages && !list_empty(pages)); | |
954 | if (bio) | |
955 | submit_bio(READ, bio); | |
956 | return 0; | |
957 | } | |
958 | ||
eb47b800 JK |
959 | static int f2fs_read_data_page(struct file *file, struct page *page) |
960 | { | |
9ffe0fb5 | 961 | struct inode *inode = page->mapping->host; |
b3d208f9 | 962 | int ret = -EAGAIN; |
9ffe0fb5 | 963 | |
c20e89cd CY |
964 | trace_f2fs_readpage(page, DATA); |
965 | ||
e1c42045 | 966 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
967 | if (f2fs_has_inline_data(inode)) |
968 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 969 | if (ret == -EAGAIN) |
f1e88660 | 970 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 971 | return ret; |
eb47b800 JK |
972 | } |
973 | ||
974 | static int f2fs_read_data_pages(struct file *file, | |
975 | struct address_space *mapping, | |
976 | struct list_head *pages, unsigned nr_pages) | |
977 | { | |
9ffe0fb5 HL |
978 | struct inode *inode = file->f_mapping->host; |
979 | ||
980 | /* If the file has inline data, skip readpages */ | |
981 | if (f2fs_has_inline_data(inode)) | |
982 | return 0; | |
983 | ||
f1e88660 | 984 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
985 | } |
986 | ||
05ca3632 | 987 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 988 | { |
05ca3632 | 989 | struct page *page = fio->page; |
eb47b800 | 990 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
991 | struct dnode_of_data dn; |
992 | int err = 0; | |
993 | ||
994 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 995 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
996 | if (err) |
997 | return err; | |
998 | ||
cf04e8eb | 999 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
1000 | |
1001 | /* This page is already truncated */ | |
2bca1e23 JK |
1002 | if (fio->blk_addr == NULL_ADDR) { |
1003 | ClearPageUptodate(page); | |
eb47b800 | 1004 | goto out_writepage; |
2bca1e23 | 1005 | } |
eb47b800 | 1006 | |
4375a336 JK |
1007 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
1008 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); | |
1009 | if (IS_ERR(fio->encrypted_page)) { | |
1010 | err = PTR_ERR(fio->encrypted_page); | |
1011 | goto out_writepage; | |
1012 | } | |
1013 | } | |
1014 | ||
eb47b800 JK |
1015 | set_page_writeback(page); |
1016 | ||
1017 | /* | |
1018 | * If current allocation needs SSR, | |
1019 | * it had better in-place writes for updated data. | |
1020 | */ | |
cf04e8eb | 1021 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 HL |
1022 | !is_cold_data(page) && |
1023 | need_inplace_update(inode))) { | |
05ca3632 | 1024 | rewrite_data_page(fio); |
fff04f90 | 1025 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1026 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1027 | } else { |
05ca3632 | 1028 | write_data_page(&dn, fio); |
216a620a | 1029 | set_data_blkaddr(&dn); |
7e4dde79 | 1030 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1031 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1032 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1033 | if (page->index == 0) |
1034 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1035 | } |
1036 | out_writepage: | |
1037 | f2fs_put_dnode(&dn); | |
1038 | return err; | |
1039 | } | |
1040 | ||
1041 | static int f2fs_write_data_page(struct page *page, | |
1042 | struct writeback_control *wbc) | |
1043 | { | |
1044 | struct inode *inode = page->mapping->host; | |
4081363f | 1045 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1046 | loff_t i_size = i_size_read(inode); |
1047 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1048 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1049 | unsigned offset = 0; |
39936837 | 1050 | bool need_balance_fs = false; |
eb47b800 | 1051 | int err = 0; |
458e6197 | 1052 | struct f2fs_io_info fio = { |
05ca3632 | 1053 | .sbi = sbi, |
458e6197 | 1054 | .type = DATA, |
6c311ec6 | 1055 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1056 | .page = page, |
4375a336 | 1057 | .encrypted_page = NULL, |
458e6197 | 1058 | }; |
eb47b800 | 1059 | |
ecda0de3 CY |
1060 | trace_f2fs_writepage(page, DATA); |
1061 | ||
eb47b800 | 1062 | if (page->index < end_index) |
39936837 | 1063 | goto write; |
eb47b800 JK |
1064 | |
1065 | /* | |
1066 | * If the offset is out-of-range of file size, | |
1067 | * this page does not have to be written to disk. | |
1068 | */ | |
1069 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1070 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1071 | goto out; |
eb47b800 JK |
1072 | |
1073 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1074 | write: |
caf0047e | 1075 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1076 | goto redirty_out; |
1e84371f JK |
1077 | if (f2fs_is_drop_cache(inode)) |
1078 | goto out; | |
1079 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1080 | available_free_memory(sbi, BASE_CHECK)) | |
1081 | goto redirty_out; | |
eb47b800 | 1082 | |
39936837 | 1083 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1084 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1085 | if (unlikely(f2fs_cp_error(sbi))) |
1086 | goto redirty_out; | |
05ca3632 | 1087 | err = do_write_data_page(&fio); |
8618b881 JK |
1088 | goto done; |
1089 | } | |
9ffe0fb5 | 1090 | |
cf779cab JK |
1091 | /* we should bypass data pages to proceed the kworkder jobs */ |
1092 | if (unlikely(f2fs_cp_error(sbi))) { | |
1093 | SetPageError(page); | |
a7ffdbe2 | 1094 | goto out; |
cf779cab JK |
1095 | } |
1096 | ||
8618b881 | 1097 | if (!wbc->for_reclaim) |
39936837 | 1098 | need_balance_fs = true; |
8618b881 | 1099 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1100 | goto redirty_out; |
eb47b800 | 1101 | |
b3d208f9 | 1102 | err = -EAGAIN; |
8618b881 | 1103 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1104 | if (f2fs_has_inline_data(inode)) |
1105 | err = f2fs_write_inline_data(inode, page); | |
1106 | if (err == -EAGAIN) | |
05ca3632 | 1107 | err = do_write_data_page(&fio); |
8618b881 JK |
1108 | f2fs_unlock_op(sbi); |
1109 | done: | |
1110 | if (err && err != -ENOENT) | |
1111 | goto redirty_out; | |
eb47b800 | 1112 | |
eb47b800 | 1113 | clear_cold_data(page); |
39936837 | 1114 | out: |
a7ffdbe2 | 1115 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1116 | if (err) |
1117 | ClearPageUptodate(page); | |
eb47b800 | 1118 | unlock_page(page); |
39936837 | 1119 | if (need_balance_fs) |
eb47b800 | 1120 | f2fs_balance_fs(sbi); |
2aea39ec JK |
1121 | if (wbc->for_reclaim) |
1122 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
1123 | return 0; |
1124 | ||
eb47b800 | 1125 | redirty_out: |
76f60268 | 1126 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1127 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1128 | } |
1129 | ||
fa9150a8 NJ |
1130 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1131 | void *data) | |
1132 | { | |
1133 | struct address_space *mapping = data; | |
1134 | int ret = mapping->a_ops->writepage(page, wbc); | |
1135 | mapping_set_error(mapping, ret); | |
1136 | return ret; | |
1137 | } | |
1138 | ||
8f46dcae CY |
1139 | /* |
1140 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1141 | * The major change is making write step of cold data page separately from | |
1142 | * warm/hot data page. | |
1143 | */ | |
1144 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1145 | struct writeback_control *wbc, writepage_t writepage, | |
1146 | void *data) | |
1147 | { | |
1148 | int ret = 0; | |
1149 | int done = 0; | |
1150 | struct pagevec pvec; | |
1151 | int nr_pages; | |
1152 | pgoff_t uninitialized_var(writeback_index); | |
1153 | pgoff_t index; | |
1154 | pgoff_t end; /* Inclusive */ | |
1155 | pgoff_t done_index; | |
1156 | int cycled; | |
1157 | int range_whole = 0; | |
1158 | int tag; | |
1159 | int step = 0; | |
1160 | ||
1161 | pagevec_init(&pvec, 0); | |
1162 | next: | |
1163 | if (wbc->range_cyclic) { | |
1164 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1165 | index = writeback_index; | |
1166 | if (index == 0) | |
1167 | cycled = 1; | |
1168 | else | |
1169 | cycled = 0; | |
1170 | end = -1; | |
1171 | } else { | |
1172 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1173 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1174 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1175 | range_whole = 1; | |
1176 | cycled = 1; /* ignore range_cyclic tests */ | |
1177 | } | |
1178 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1179 | tag = PAGECACHE_TAG_TOWRITE; | |
1180 | else | |
1181 | tag = PAGECACHE_TAG_DIRTY; | |
1182 | retry: | |
1183 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1184 | tag_pages_for_writeback(mapping, index, end); | |
1185 | done_index = index; | |
1186 | while (!done && (index <= end)) { | |
1187 | int i; | |
1188 | ||
1189 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1190 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1191 | if (nr_pages == 0) | |
1192 | break; | |
1193 | ||
1194 | for (i = 0; i < nr_pages; i++) { | |
1195 | struct page *page = pvec.pages[i]; | |
1196 | ||
1197 | if (page->index > end) { | |
1198 | done = 1; | |
1199 | break; | |
1200 | } | |
1201 | ||
1202 | done_index = page->index; | |
1203 | ||
1204 | lock_page(page); | |
1205 | ||
1206 | if (unlikely(page->mapping != mapping)) { | |
1207 | continue_unlock: | |
1208 | unlock_page(page); | |
1209 | continue; | |
1210 | } | |
1211 | ||
1212 | if (!PageDirty(page)) { | |
1213 | /* someone wrote it for us */ | |
1214 | goto continue_unlock; | |
1215 | } | |
1216 | ||
737f1899 | 1217 | if (step == is_cold_data(page)) |
8f46dcae CY |
1218 | goto continue_unlock; |
1219 | ||
1220 | if (PageWriteback(page)) { | |
1221 | if (wbc->sync_mode != WB_SYNC_NONE) | |
1222 | f2fs_wait_on_page_writeback(page, DATA); | |
1223 | else | |
1224 | goto continue_unlock; | |
1225 | } | |
1226 | ||
1227 | BUG_ON(PageWriteback(page)); | |
1228 | if (!clear_page_dirty_for_io(page)) | |
1229 | goto continue_unlock; | |
1230 | ||
1231 | ret = (*writepage)(page, wbc, data); | |
1232 | if (unlikely(ret)) { | |
1233 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1234 | unlock_page(page); | |
1235 | ret = 0; | |
1236 | } else { | |
1237 | done_index = page->index + 1; | |
1238 | done = 1; | |
1239 | break; | |
1240 | } | |
1241 | } | |
1242 | ||
1243 | if (--wbc->nr_to_write <= 0 && | |
1244 | wbc->sync_mode == WB_SYNC_NONE) { | |
1245 | done = 1; | |
1246 | break; | |
1247 | } | |
1248 | } | |
1249 | pagevec_release(&pvec); | |
1250 | cond_resched(); | |
1251 | } | |
1252 | ||
1253 | if (step < 1) { | |
1254 | step++; | |
1255 | goto next; | |
1256 | } | |
1257 | ||
1258 | if (!cycled && !done) { | |
1259 | cycled = 1; | |
1260 | index = 0; | |
1261 | end = writeback_index - 1; | |
1262 | goto retry; | |
1263 | } | |
1264 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1265 | mapping->writeback_index = done_index; | |
1266 | ||
1267 | return ret; | |
1268 | } | |
1269 | ||
25ca923b | 1270 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1271 | struct writeback_control *wbc) |
1272 | { | |
1273 | struct inode *inode = mapping->host; | |
4081363f | 1274 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1275 | bool locked = false; |
eb47b800 | 1276 | int ret; |
50c8cdb3 | 1277 | long diff; |
eb47b800 | 1278 | |
e5748434 CY |
1279 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1280 | ||
cfb185a1 | 1281 | /* deal with chardevs and other special file */ |
1282 | if (!mapping->a_ops->writepage) | |
1283 | return 0; | |
1284 | ||
6a290544 CY |
1285 | /* skip writing if there is no dirty page in this inode */ |
1286 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1287 | return 0; | |
1288 | ||
87d6f890 | 1289 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
a7ffdbe2 | 1290 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && |
6fb03f3a | 1291 | available_free_memory(sbi, DIRTY_DENTS)) |
d3baf95d | 1292 | goto skip_write; |
87d6f890 | 1293 | |
d5669f7b JK |
1294 | /* during POR, we don't need to trigger writepage at all. */ |
1295 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1296 | goto skip_write; | |
1297 | ||
50c8cdb3 | 1298 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1299 | |
5463e7c1 JK |
1300 | if (!S_ISDIR(inode->i_mode)) { |
1301 | mutex_lock(&sbi->writepages); | |
1302 | locked = true; | |
1303 | } | |
8f46dcae | 1304 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
bb96a8d5 | 1305 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
5463e7c1 JK |
1306 | if (locked) |
1307 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1308 | |
eb47b800 JK |
1309 | remove_dirty_dir_inode(inode); |
1310 | ||
50c8cdb3 | 1311 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1312 | return ret; |
d3baf95d JK |
1313 | |
1314 | skip_write: | |
a7ffdbe2 | 1315 | wbc->pages_skipped += get_dirty_pages(inode); |
d3baf95d | 1316 | return 0; |
eb47b800 JK |
1317 | } |
1318 | ||
3aab8f82 CY |
1319 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1320 | { | |
1321 | struct inode *inode = mapping->host; | |
1322 | ||
1323 | if (to > inode->i_size) { | |
1324 | truncate_pagecache(inode, inode->i_size); | |
764aa3e9 | 1325 | truncate_blocks(inode, inode->i_size, true); |
3aab8f82 CY |
1326 | } |
1327 | } | |
1328 | ||
eb47b800 JK |
1329 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1330 | loff_t pos, unsigned len, unsigned flags, | |
1331 | struct page **pagep, void **fsdata) | |
1332 | { | |
1333 | struct inode *inode = mapping->host; | |
4081363f | 1334 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b JK |
1335 | struct page *page = NULL; |
1336 | struct page *ipage; | |
eb47b800 JK |
1337 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
1338 | struct dnode_of_data dn; | |
1339 | int err = 0; | |
1340 | ||
62aed044 CY |
1341 | trace_f2fs_write_begin(inode, pos, len, flags); |
1342 | ||
eb47b800 | 1343 | f2fs_balance_fs(sbi); |
5f727395 JK |
1344 | |
1345 | /* | |
1346 | * We should check this at this moment to avoid deadlock on inode page | |
1347 | * and #0 page. The locking rule for inline_data conversion should be: | |
1348 | * lock_page(page #0) -> lock_page(inode_page) | |
1349 | */ | |
1350 | if (index != 0) { | |
1351 | err = f2fs_convert_inline_inode(inode); | |
1352 | if (err) | |
1353 | goto fail; | |
1354 | } | |
afcb7ca0 | 1355 | repeat: |
eb47b800 | 1356 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1357 | if (!page) { |
1358 | err = -ENOMEM; | |
1359 | goto fail; | |
1360 | } | |
d5f66990 | 1361 | |
eb47b800 JK |
1362 | *pagep = page; |
1363 | ||
e479556b | 1364 | f2fs_lock_op(sbi); |
9ba69cf9 JK |
1365 | |
1366 | /* check inline_data */ | |
1367 | ipage = get_node_page(sbi, inode->i_ino); | |
cd34e296 CY |
1368 | if (IS_ERR(ipage)) { |
1369 | err = PTR_ERR(ipage); | |
9ba69cf9 | 1370 | goto unlock_fail; |
cd34e296 | 1371 | } |
9ba69cf9 | 1372 | |
b3d208f9 JK |
1373 | set_new_dnode(&dn, inode, ipage, ipage, 0); |
1374 | ||
9ba69cf9 | 1375 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 JK |
1376 | if (pos + len <= MAX_INLINE_DATA) { |
1377 | read_inline_data(page, ipage); | |
1378 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
1379 | sync_inode_page(&dn); | |
1380 | goto put_next; | |
b3d208f9 | 1381 | } |
5f727395 JK |
1382 | err = f2fs_convert_inline_page(&dn, page); |
1383 | if (err) | |
1384 | goto put_fail; | |
b600965c | 1385 | } |
9ba69cf9 JK |
1386 | err = f2fs_reserve_block(&dn, index); |
1387 | if (err) | |
8cdcb713 | 1388 | goto put_fail; |
b3d208f9 | 1389 | put_next: |
9ba69cf9 JK |
1390 | f2fs_put_dnode(&dn); |
1391 | f2fs_unlock_op(sbi); | |
1392 | ||
5768dcdd FL |
1393 | f2fs_wait_on_page_writeback(page, DATA); |
1394 | ||
90d4388a CY |
1395 | if (len == PAGE_CACHE_SIZE) |
1396 | goto out_update; | |
1397 | if (PageUptodate(page)) | |
1398 | goto out_clear; | |
eb47b800 JK |
1399 | |
1400 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1401 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1402 | unsigned end = start + len; | |
1403 | ||
1404 | /* Reading beyond i_size is simple: memset to zero */ | |
1405 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
90d4388a | 1406 | goto out_update; |
eb47b800 JK |
1407 | } |
1408 | ||
b3d208f9 | 1409 | if (dn.data_blkaddr == NEW_ADDR) { |
eb47b800 JK |
1410 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1411 | } else { | |
cf04e8eb | 1412 | struct f2fs_io_info fio = { |
05ca3632 | 1413 | .sbi = sbi, |
cf04e8eb JK |
1414 | .type = DATA, |
1415 | .rw = READ_SYNC, | |
1416 | .blk_addr = dn.data_blkaddr, | |
05ca3632 | 1417 | .page = page, |
4375a336 | 1418 | .encrypted_page = NULL, |
cf04e8eb | 1419 | }; |
05ca3632 | 1420 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1421 | if (err) |
1422 | goto fail; | |
d54c795b | 1423 | |
393ff91f | 1424 | lock_page(page); |
6bacf52f | 1425 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1426 | err = -EIO; |
1427 | goto fail; | |
eb47b800 | 1428 | } |
6bacf52f | 1429 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1430 | f2fs_put_page(page, 1); |
1431 | goto repeat; | |
eb47b800 | 1432 | } |
4375a336 JK |
1433 | |
1434 | /* avoid symlink page */ | |
1435 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1436 | err = f2fs_decrypt_one(inode, page); | |
86531d6b | 1437 | if (err) |
4375a336 | 1438 | goto fail; |
4375a336 | 1439 | } |
eb47b800 | 1440 | } |
90d4388a | 1441 | out_update: |
eb47b800 | 1442 | SetPageUptodate(page); |
90d4388a | 1443 | out_clear: |
eb47b800 JK |
1444 | clear_cold_data(page); |
1445 | return 0; | |
9ba69cf9 | 1446 | |
8cdcb713 JK |
1447 | put_fail: |
1448 | f2fs_put_dnode(&dn); | |
9ba69cf9 JK |
1449 | unlock_fail: |
1450 | f2fs_unlock_op(sbi); | |
3aab8f82 | 1451 | fail: |
86531d6b | 1452 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1453 | f2fs_write_failed(mapping, pos + len); |
1454 | return err; | |
eb47b800 JK |
1455 | } |
1456 | ||
a1dd3c13 JK |
1457 | static int f2fs_write_end(struct file *file, |
1458 | struct address_space *mapping, | |
1459 | loff_t pos, unsigned len, unsigned copied, | |
1460 | struct page *page, void *fsdata) | |
1461 | { | |
1462 | struct inode *inode = page->mapping->host; | |
1463 | ||
dfb2bf38 CY |
1464 | trace_f2fs_write_end(inode, pos, len, copied); |
1465 | ||
34ba94ba | 1466 | set_page_dirty(page); |
a1dd3c13 JK |
1467 | |
1468 | if (pos + copied > i_size_read(inode)) { | |
1469 | i_size_write(inode, pos + copied); | |
1470 | mark_inode_dirty(inode); | |
1471 | update_inode_page(inode); | |
1472 | } | |
1473 | ||
75c3c8bc | 1474 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
1475 | return copied; |
1476 | } | |
1477 | ||
6f673763 OS |
1478 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1479 | loff_t offset) | |
944fcfc1 JK |
1480 | { |
1481 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1482 | |
6f673763 | 1483 | if (iov_iter_rw(iter) == READ) |
944fcfc1 JK |
1484 | return 0; |
1485 | ||
1486 | if (offset & blocksize_mask) | |
1487 | return -EINVAL; | |
1488 | ||
5b46f25d AV |
1489 | if (iov_iter_alignment(iter) & blocksize_mask) |
1490 | return -EINVAL; | |
1491 | ||
944fcfc1 JK |
1492 | return 0; |
1493 | } | |
1494 | ||
22c6186e OS |
1495 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1496 | loff_t offset) | |
eb47b800 JK |
1497 | { |
1498 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1499 | struct address_space *mapping = file->f_mapping; |
1500 | struct inode *inode = mapping->host; | |
1501 | size_t count = iov_iter_count(iter); | |
1502 | int err; | |
944fcfc1 | 1503 | |
b3d208f9 JK |
1504 | /* we don't need to use inline_data strictly */ |
1505 | if (f2fs_has_inline_data(inode)) { | |
1506 | err = f2fs_convert_inline_inode(inode); | |
1507 | if (err) | |
1508 | return err; | |
1509 | } | |
9ffe0fb5 | 1510 | |
fcc85a4d JK |
1511 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1512 | return 0; | |
1513 | ||
6f673763 | 1514 | if (check_direct_IO(inode, iter, offset)) |
944fcfc1 JK |
1515 | return 0; |
1516 | ||
6f673763 | 1517 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1518 | |
6f673763 | 1519 | if (iov_iter_rw(iter) == WRITE) |
59b802e5 JK |
1520 | __allocate_data_blocks(inode, offset, count); |
1521 | ||
17f8c842 | 1522 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block); |
6f673763 | 1523 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1524 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1525 | |
6f673763 | 1526 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1527 | |
3aab8f82 | 1528 | return err; |
eb47b800 JK |
1529 | } |
1530 | ||
487261f3 CY |
1531 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1532 | unsigned int length) | |
eb47b800 JK |
1533 | { |
1534 | struct inode *inode = page->mapping->host; | |
487261f3 | 1535 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1536 | |
487261f3 CY |
1537 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1538 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1539 | return; |
1540 | ||
487261f3 CY |
1541 | if (PageDirty(page)) { |
1542 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1543 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1544 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1545 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1546 | else | |
1547 | inode_dec_dirty_pages(inode); | |
1548 | } | |
eb47b800 JK |
1549 | ClearPagePrivate(page); |
1550 | } | |
1551 | ||
487261f3 | 1552 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1553 | { |
f68daeeb JK |
1554 | /* If this is dirty page, keep PagePrivate */ |
1555 | if (PageDirty(page)) | |
1556 | return 0; | |
1557 | ||
eb47b800 | 1558 | ClearPagePrivate(page); |
c3850aa1 | 1559 | return 1; |
eb47b800 JK |
1560 | } |
1561 | ||
1562 | static int f2fs_set_data_page_dirty(struct page *page) | |
1563 | { | |
1564 | struct address_space *mapping = page->mapping; | |
1565 | struct inode *inode = mapping->host; | |
1566 | ||
26c6b887 JK |
1567 | trace_f2fs_set_page_dirty(page, DATA); |
1568 | ||
eb47b800 | 1569 | SetPageUptodate(page); |
34ba94ba | 1570 | |
1e84371f | 1571 | if (f2fs_is_atomic_file(inode)) { |
34ba94ba JK |
1572 | register_inmem_page(inode, page); |
1573 | return 1; | |
1574 | } | |
1575 | ||
eb47b800 JK |
1576 | if (!PageDirty(page)) { |
1577 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1578 | update_dirty_page(inode, page); |
eb47b800 JK |
1579 | return 1; |
1580 | } | |
1581 | return 0; | |
1582 | } | |
1583 | ||
c01e54b7 JK |
1584 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1585 | { | |
454ae7e5 CY |
1586 | struct inode *inode = mapping->host; |
1587 | ||
b3d208f9 JK |
1588 | /* we don't need to use inline_data strictly */ |
1589 | if (f2fs_has_inline_data(inode)) { | |
1590 | int err = f2fs_convert_inline_inode(inode); | |
1591 | if (err) | |
1592 | return err; | |
1593 | } | |
bfad7c2d | 1594 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1595 | } |
1596 | ||
eb47b800 JK |
1597 | const struct address_space_operations f2fs_dblock_aops = { |
1598 | .readpage = f2fs_read_data_page, | |
1599 | .readpages = f2fs_read_data_pages, | |
1600 | .writepage = f2fs_write_data_page, | |
1601 | .writepages = f2fs_write_data_pages, | |
1602 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1603 | .write_end = f2fs_write_end, |
eb47b800 | 1604 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1605 | .invalidatepage = f2fs_invalidate_page, |
1606 | .releasepage = f2fs_release_page, | |
eb47b800 | 1607 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1608 | .bmap = f2fs_bmap, |
eb47b800 | 1609 | }; |