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Commit | Line | Data |
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0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
f1e88660 | 22 | #include <linux/cleancache.h> |
eb47b800 JK |
23 | |
24 | #include "f2fs.h" | |
25 | #include "node.h" | |
26 | #include "segment.h" | |
db9f7c1a | 27 | #include "trace.h" |
848753aa | 28 | #include <trace/events/f2fs.h> |
eb47b800 | 29 | |
4246a0b6 | 30 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 31 | { |
f568849e LT |
32 | struct bio_vec *bvec; |
33 | int i; | |
93dfe2ac | 34 | |
4375a336 | 35 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 36 | if (bio->bi_error) { |
4375a336 JK |
37 | f2fs_release_crypto_ctx(bio->bi_private); |
38 | } else { | |
39 | f2fs_end_io_crypto_work(bio->bi_private, bio); | |
40 | return; | |
41 | } | |
42 | } | |
43 | ||
12377024 CY |
44 | bio_for_each_segment_all(bvec, bio, i) { |
45 | struct page *page = bvec->bv_page; | |
f1e88660 | 46 | |
4246a0b6 | 47 | if (!bio->bi_error) { |
f1e88660 JK |
48 | SetPageUptodate(page); |
49 | } else { | |
50 | ClearPageUptodate(page); | |
51 | SetPageError(page); | |
52 | } | |
53 | unlock_page(page); | |
54 | } | |
f1e88660 JK |
55 | bio_put(bio); |
56 | } | |
57 | ||
4246a0b6 | 58 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 59 | { |
1b1f559f | 60 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
61 | struct bio_vec *bvec; |
62 | int i; | |
93dfe2ac | 63 | |
f568849e | 64 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
65 | struct page *page = bvec->bv_page; |
66 | ||
4375a336 JK |
67 | f2fs_restore_and_release_control_page(&page); |
68 | ||
4246a0b6 | 69 | if (unlikely(bio->bi_error)) { |
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 | ||
740432f8 | 93 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
94 | |
95 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 96 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 97 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 98 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
99 | |
100 | return bio; | |
101 | } | |
102 | ||
458e6197 | 103 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 104 | { |
458e6197 | 105 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
106 | |
107 | if (!io->bio) | |
108 | return; | |
109 | ||
6a8f8ca5 | 110 | if (is_read_io(fio->rw)) |
2ace38e0 | 111 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 112 | else |
2ace38e0 | 113 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 114 | |
6a8f8ca5 | 115 | submit_bio(fio->rw, io->bio); |
93dfe2ac JK |
116 | io->bio = NULL; |
117 | } | |
118 | ||
119 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
458e6197 | 120 | enum page_type type, int rw) |
93dfe2ac JK |
121 | { |
122 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
123 | struct f2fs_bio_info *io; | |
124 | ||
125 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
126 | ||
df0f8dc0 | 127 | down_write(&io->io_rwsem); |
458e6197 JK |
128 | |
129 | /* change META to META_FLUSH in the checkpoint procedure */ | |
130 | if (type >= META_FLUSH) { | |
131 | io->fio.type = META_FLUSH; | |
0f7b2abd JK |
132 | if (test_opt(sbi, NOBARRIER)) |
133 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
134 | else | |
135 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; | |
458e6197 JK |
136 | } |
137 | __submit_merged_bio(io); | |
df0f8dc0 | 138 | up_write(&io->io_rwsem); |
93dfe2ac JK |
139 | } |
140 | ||
141 | /* | |
142 | * Fill the locked page with data located in the block address. | |
143 | * Return unlocked page. | |
144 | */ | |
05ca3632 | 145 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 146 | { |
93dfe2ac | 147 | struct bio *bio; |
4375a336 | 148 | struct page *page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
93dfe2ac | 149 | |
2ace38e0 | 150 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 151 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
152 | |
153 | /* Allocate a new bio */ | |
05ca3632 | 154 | bio = __bio_alloc(fio->sbi, fio->blk_addr, 1, is_read_io(fio->rw)); |
93dfe2ac JK |
155 | |
156 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
157 | bio_put(bio); | |
93dfe2ac JK |
158 | return -EFAULT; |
159 | } | |
160 | ||
cf04e8eb | 161 | submit_bio(fio->rw, bio); |
93dfe2ac JK |
162 | return 0; |
163 | } | |
164 | ||
05ca3632 | 165 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 166 | { |
05ca3632 | 167 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 168 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 169 | struct f2fs_bio_info *io; |
940a6d34 | 170 | bool is_read = is_read_io(fio->rw); |
4375a336 | 171 | struct page *bio_page; |
93dfe2ac | 172 | |
940a6d34 | 173 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 174 | |
cf04e8eb | 175 | verify_block_addr(sbi, fio->blk_addr); |
93dfe2ac | 176 | |
df0f8dc0 | 177 | down_write(&io->io_rwsem); |
93dfe2ac | 178 | |
940a6d34 | 179 | if (!is_read) |
93dfe2ac JK |
180 | inc_page_count(sbi, F2FS_WRITEBACK); |
181 | ||
cf04e8eb | 182 | if (io->bio && (io->last_block_in_bio != fio->blk_addr - 1 || |
458e6197 JK |
183 | io->fio.rw != fio->rw)) |
184 | __submit_merged_bio(io); | |
93dfe2ac JK |
185 | alloc_new: |
186 | if (io->bio == NULL) { | |
90a893c7 | 187 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 188 | |
cf04e8eb | 189 | io->bio = __bio_alloc(sbi, fio->blk_addr, bio_blocks, is_read); |
458e6197 | 190 | io->fio = *fio; |
93dfe2ac JK |
191 | } |
192 | ||
4375a336 JK |
193 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
194 | ||
195 | if (bio_add_page(io->bio, bio_page, PAGE_CACHE_SIZE, 0) < | |
93dfe2ac | 196 | PAGE_CACHE_SIZE) { |
458e6197 | 197 | __submit_merged_bio(io); |
93dfe2ac JK |
198 | goto alloc_new; |
199 | } | |
200 | ||
cf04e8eb | 201 | io->last_block_in_bio = fio->blk_addr; |
05ca3632 | 202 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 203 | |
df0f8dc0 | 204 | up_write(&io->io_rwsem); |
05ca3632 | 205 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
206 | } |
207 | ||
0a8165d7 | 208 | /* |
eb47b800 JK |
209 | * Lock ordering for the change of data block address: |
210 | * ->data_page | |
211 | * ->node_page | |
212 | * update block addresses in the node page | |
213 | */ | |
216a620a | 214 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 JK |
215 | { |
216 | struct f2fs_node *rn; | |
217 | __le32 *addr_array; | |
218 | struct page *node_page = dn->node_page; | |
219 | unsigned int ofs_in_node = dn->ofs_in_node; | |
220 | ||
5514f0aa | 221 | f2fs_wait_on_page_writeback(node_page, NODE); |
eb47b800 | 222 | |
45590710 | 223 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
224 | |
225 | /* Get physical address of data block */ | |
226 | addr_array = blkaddr_in_node(rn); | |
e1509cf2 | 227 | addr_array[ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
12719ae1 JK |
228 | if (set_page_dirty(node_page)) |
229 | dn->node_changed = true; | |
eb47b800 JK |
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 | ||
759af1c9 | 266 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 267 | { |
028a41e8 | 268 | struct extent_info ei; |
759af1c9 | 269 | struct inode *inode = dn->inode; |
028a41e8 | 270 | |
759af1c9 FL |
271 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
272 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
273 | return 0; | |
429511cd | 274 | } |
028a41e8 | 275 | |
759af1c9 | 276 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
277 | } |
278 | ||
a56c7c6f JK |
279 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
280 | int rw, bool for_write) | |
eb47b800 | 281 | { |
eb47b800 JK |
282 | struct address_space *mapping = inode->i_mapping; |
283 | struct dnode_of_data dn; | |
284 | struct page *page; | |
cb3bc9ee | 285 | struct extent_info ei; |
eb47b800 | 286 | int err; |
cf04e8eb | 287 | struct f2fs_io_info fio = { |
05ca3632 | 288 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 289 | .type = DATA, |
43f3eae1 | 290 | .rw = rw, |
4375a336 | 291 | .encrypted_page = NULL, |
cf04e8eb | 292 | }; |
eb47b800 | 293 | |
4375a336 JK |
294 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
295 | return read_mapping_page(mapping, index, NULL); | |
296 | ||
a56c7c6f | 297 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
298 | if (!page) |
299 | return ERR_PTR(-ENOMEM); | |
300 | ||
cb3bc9ee CY |
301 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
302 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
303 | goto got_it; | |
304 | } | |
305 | ||
eb47b800 | 306 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 307 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
308 | if (err) |
309 | goto put_err; | |
eb47b800 JK |
310 | f2fs_put_dnode(&dn); |
311 | ||
6bacf52f | 312 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
313 | err = -ENOENT; |
314 | goto put_err; | |
650495de | 315 | } |
cb3bc9ee | 316 | got_it: |
43f3eae1 JK |
317 | if (PageUptodate(page)) { |
318 | unlock_page(page); | |
eb47b800 | 319 | return page; |
43f3eae1 | 320 | } |
eb47b800 | 321 | |
d59ff4df JK |
322 | /* |
323 | * A new dentry page is allocated but not able to be written, since its | |
324 | * new inode page couldn't be allocated due to -ENOSPC. | |
325 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
326 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
327 | */ | |
328 | if (dn.data_blkaddr == NEW_ADDR) { | |
329 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
330 | SetPageUptodate(page); | |
43f3eae1 | 331 | unlock_page(page); |
d59ff4df JK |
332 | return page; |
333 | } | |
eb47b800 | 334 | |
cf04e8eb | 335 | fio.blk_addr = dn.data_blkaddr; |
05ca3632 JK |
336 | fio.page = page; |
337 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 338 | if (err) |
86531d6b | 339 | goto put_err; |
43f3eae1 | 340 | return page; |
86531d6b JK |
341 | |
342 | put_err: | |
343 | f2fs_put_page(page, 1); | |
344 | return ERR_PTR(err); | |
43f3eae1 JK |
345 | } |
346 | ||
347 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
348 | { | |
349 | struct address_space *mapping = inode->i_mapping; | |
350 | struct page *page; | |
351 | ||
352 | page = find_get_page(mapping, index); | |
353 | if (page && PageUptodate(page)) | |
354 | return page; | |
355 | f2fs_put_page(page, 0); | |
356 | ||
a56c7c6f | 357 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
358 | if (IS_ERR(page)) |
359 | return page; | |
360 | ||
361 | if (PageUptodate(page)) | |
362 | return page; | |
363 | ||
364 | wait_on_page_locked(page); | |
365 | if (unlikely(!PageUptodate(page))) { | |
366 | f2fs_put_page(page, 0); | |
367 | return ERR_PTR(-EIO); | |
368 | } | |
369 | return page; | |
370 | } | |
371 | ||
372 | /* | |
373 | * If it tries to access a hole, return an error. | |
374 | * Because, the callers, functions in dir.c and GC, should be able to know | |
375 | * whether this page exists or not. | |
376 | */ | |
a56c7c6f JK |
377 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
378 | bool for_write) | |
43f3eae1 JK |
379 | { |
380 | struct address_space *mapping = inode->i_mapping; | |
381 | struct page *page; | |
382 | repeat: | |
a56c7c6f | 383 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
384 | if (IS_ERR(page)) |
385 | return page; | |
393ff91f | 386 | |
43f3eae1 | 387 | /* wait for read completion */ |
393ff91f | 388 | lock_page(page); |
6bacf52f | 389 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
390 | f2fs_put_page(page, 1); |
391 | return ERR_PTR(-EIO); | |
eb47b800 | 392 | } |
6bacf52f | 393 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
394 | f2fs_put_page(page, 1); |
395 | goto repeat; | |
eb47b800 JK |
396 | } |
397 | return page; | |
398 | } | |
399 | ||
0a8165d7 | 400 | /* |
eb47b800 JK |
401 | * Caller ensures that this data page is never allocated. |
402 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 403 | * |
4f4124d0 CY |
404 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
405 | * f2fs_unlock_op(). | |
470f00e9 CY |
406 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
407 | * ipage should be released by this function. | |
eb47b800 | 408 | */ |
64aa7ed9 | 409 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 410 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 411 | { |
eb47b800 JK |
412 | struct address_space *mapping = inode->i_mapping; |
413 | struct page *page; | |
414 | struct dnode_of_data dn; | |
415 | int err; | |
7612118a | 416 | |
a56c7c6f | 417 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
418 | if (!page) { |
419 | /* | |
420 | * before exiting, we should make sure ipage will be released | |
421 | * if any error occur. | |
422 | */ | |
423 | f2fs_put_page(ipage, 1); | |
01f28610 | 424 | return ERR_PTR(-ENOMEM); |
470f00e9 | 425 | } |
eb47b800 | 426 | |
a8865372 | 427 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 428 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
429 | if (err) { |
430 | f2fs_put_page(page, 1); | |
eb47b800 | 431 | return ERR_PTR(err); |
a8865372 | 432 | } |
01f28610 JK |
433 | if (!ipage) |
434 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
435 | |
436 | if (PageUptodate(page)) | |
01f28610 | 437 | goto got_it; |
eb47b800 JK |
438 | |
439 | if (dn.data_blkaddr == NEW_ADDR) { | |
440 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 441 | SetPageUptodate(page); |
eb47b800 | 442 | } else { |
4375a336 | 443 | f2fs_put_page(page, 1); |
a8865372 | 444 | |
7612118a JK |
445 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
446 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
447 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 448 | if (IS_ERR(page)) |
7612118a | 449 | return page; |
eb47b800 | 450 | } |
01f28610 | 451 | got_it: |
9edcdabf CY |
452 | if (new_i_size && i_size_read(inode) < |
453 | ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)) { | |
454 | i_size_write(inode, ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
455 | /* Only the directory inode sets new_i_size */ |
456 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
457 | } |
458 | return page; | |
459 | } | |
460 | ||
bfad7c2d JK |
461 | static int __allocate_data_block(struct dnode_of_data *dn) |
462 | { | |
4081363f | 463 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
976e4c50 | 464 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); |
bfad7c2d | 465 | struct f2fs_summary sum; |
bfad7c2d | 466 | struct node_info ni; |
38aa0889 | 467 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 468 | pgoff_t fofs; |
bfad7c2d JK |
469 | |
470 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
471 | return -EPERM; | |
df6136ef CY |
472 | |
473 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
474 | if (dn->data_blkaddr == NEW_ADDR) | |
475 | goto alloc; | |
476 | ||
bfad7c2d JK |
477 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
478 | return -ENOSPC; | |
479 | ||
df6136ef | 480 | alloc: |
bfad7c2d JK |
481 | get_node_info(sbi, dn->nid, &ni); |
482 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
483 | ||
38aa0889 JK |
484 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
485 | seg = CURSEG_DIRECT_IO; | |
486 | ||
df6136ef CY |
487 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
488 | &sum, seg); | |
216a620a | 489 | set_data_blkaddr(dn); |
bfad7c2d | 490 | |
976e4c50 JK |
491 | /* update i_size */ |
492 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + | |
493 | dn->ofs_in_node; | |
9edcdabf CY |
494 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)) |
495 | i_size_write(dn->inode, | |
496 | ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)); | |
bfad7c2d JK |
497 | return 0; |
498 | } | |
499 | ||
6d5a1495 | 500 | static int __allocate_data_blocks(struct inode *inode, loff_t offset, |
59b802e5 JK |
501 | size_t count) |
502 | { | |
503 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
504 | struct dnode_of_data dn; | |
505 | u64 start = F2FS_BYTES_TO_BLK(offset); | |
506 | u64 len = F2FS_BYTES_TO_BLK(count); | |
507 | bool allocated; | |
508 | u64 end_offset; | |
6d5a1495 | 509 | int err = 0; |
59b802e5 JK |
510 | |
511 | while (len) { | |
59b802e5 JK |
512 | f2fs_lock_op(sbi); |
513 | ||
514 | /* When reading holes, we need its node page */ | |
515 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
6d5a1495 CY |
516 | err = get_dnode_of_data(&dn, start, ALLOC_NODE); |
517 | if (err) | |
59b802e5 JK |
518 | goto out; |
519 | ||
520 | allocated = false; | |
521 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); | |
522 | ||
523 | while (dn.ofs_in_node < end_offset && len) { | |
d6d4f1cb CY |
524 | block_t blkaddr; |
525 | ||
6d5a1495 CY |
526 | if (unlikely(f2fs_cp_error(sbi))) { |
527 | err = -EIO; | |
f9811703 | 528 | goto sync_out; |
6d5a1495 | 529 | } |
f9811703 | 530 | |
d6d4f1cb | 531 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
df6136ef | 532 | if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) { |
6d5a1495 CY |
533 | err = __allocate_data_block(&dn); |
534 | if (err) | |
59b802e5 JK |
535 | goto sync_out; |
536 | allocated = true; | |
537 | } | |
538 | len--; | |
539 | start++; | |
540 | dn.ofs_in_node++; | |
541 | } | |
542 | ||
543 | if (allocated) | |
544 | sync_inode_page(&dn); | |
545 | ||
546 | f2fs_put_dnode(&dn); | |
547 | f2fs_unlock_op(sbi); | |
2a340760 | 548 | |
2c4db1a6 | 549 | f2fs_balance_fs(sbi, dn.node_changed); |
59b802e5 | 550 | } |
6d5a1495 | 551 | return err; |
59b802e5 JK |
552 | |
553 | sync_out: | |
554 | if (allocated) | |
555 | sync_inode_page(&dn); | |
556 | f2fs_put_dnode(&dn); | |
557 | out: | |
558 | f2fs_unlock_op(sbi); | |
2c4db1a6 | 559 | f2fs_balance_fs(sbi, dn.node_changed); |
6d5a1495 | 560 | return err; |
59b802e5 JK |
561 | } |
562 | ||
0a8165d7 | 563 | /* |
003a3e1d JK |
564 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
565 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
566 | * If original data blocks are allocated, then give them to blockdev. |
567 | * Otherwise, | |
568 | * a. preallocate requested block addresses | |
569 | * b. do not use extent cache for better performance | |
570 | * c. give the block addresses to blockdev | |
eb47b800 | 571 | */ |
d323d005 | 572 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 573 | int create, int flag) |
eb47b800 | 574 | { |
003a3e1d | 575 | unsigned int maxblocks = map->m_len; |
eb47b800 | 576 | struct dnode_of_data dn; |
f9811703 | 577 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
bfad7c2d JK |
578 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
579 | pgoff_t pgofs, end_offset; | |
580 | int err = 0, ofs = 1; | |
a2e7d1bf | 581 | struct extent_info ei; |
bfad7c2d | 582 | bool allocated = false; |
7df3a431 | 583 | block_t blkaddr; |
eb47b800 | 584 | |
003a3e1d JK |
585 | map->m_len = 0; |
586 | map->m_flags = 0; | |
587 | ||
588 | /* it only supports block size == page size */ | |
589 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 590 | |
7e4dde79 | 591 | if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
592 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
593 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
594 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 595 | goto out; |
a2e7d1bf | 596 | } |
bfad7c2d | 597 | |
59b802e5 | 598 | if (create) |
3104af35 | 599 | f2fs_lock_op(sbi); |
eb47b800 JK |
600 | |
601 | /* When reading holes, we need its node page */ | |
602 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 603 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 604 | if (err) { |
bfad7c2d JK |
605 | if (err == -ENOENT) |
606 | err = 0; | |
607 | goto unlock_out; | |
848753aa | 608 | } |
973163fc CY |
609 | |
610 | if (dn.data_blkaddr == NEW_ADDR || dn.data_blkaddr == NULL_ADDR) { | |
611 | if (create) { | |
f9811703 CY |
612 | if (unlikely(f2fs_cp_error(sbi))) { |
613 | err = -EIO; | |
614 | goto put_out; | |
615 | } | |
973163fc CY |
616 | err = __allocate_data_block(&dn); |
617 | if (err) | |
618 | goto put_out; | |
619 | allocated = true; | |
620 | map->m_flags = F2FS_MAP_NEW; | |
621 | } else { | |
622 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
623 | dn.data_blkaddr != NEW_ADDR) { | |
624 | if (flag == F2FS_GET_BLOCK_BMAP) | |
625 | err = -ENOENT; | |
626 | goto put_out; | |
627 | } | |
628 | ||
629 | /* | |
630 | * preallocated unwritten block should be mapped | |
631 | * for fiemap. | |
632 | */ | |
633 | if (dn.data_blkaddr == NEW_ADDR) | |
634 | map->m_flags = F2FS_MAP_UNWRITTEN; | |
e2b4e2bc | 635 | } |
e2b4e2bc | 636 | } |
eb47b800 | 637 | |
973163fc CY |
638 | map->m_flags |= F2FS_MAP_MAPPED; |
639 | map->m_pblk = dn.data_blkaddr; | |
640 | map->m_len = 1; | |
bfad7c2d | 641 | |
6403eb1f | 642 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d JK |
643 | dn.ofs_in_node++; |
644 | pgofs++; | |
645 | ||
646 | get_next: | |
7df3a431 FL |
647 | if (map->m_len >= maxblocks) |
648 | goto sync_out; | |
649 | ||
bfad7c2d JK |
650 | if (dn.ofs_in_node >= end_offset) { |
651 | if (allocated) | |
652 | sync_inode_page(&dn); | |
653 | allocated = false; | |
654 | f2fs_put_dnode(&dn); | |
655 | ||
3104af35 CY |
656 | if (create) { |
657 | f2fs_unlock_op(sbi); | |
2c4db1a6 | 658 | f2fs_balance_fs(sbi, dn.node_changed); |
3104af35 CY |
659 | f2fs_lock_op(sbi); |
660 | } | |
661 | ||
bfad7c2d JK |
662 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
663 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 664 | if (err) { |
bfad7c2d JK |
665 | if (err == -ENOENT) |
666 | err = 0; | |
667 | goto unlock_out; | |
668 | } | |
e2b4e2bc | 669 | |
6403eb1f | 670 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 671 | } |
eb47b800 | 672 | |
7df3a431 | 673 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
973163fc | 674 | |
7df3a431 FL |
675 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { |
676 | if (create) { | |
677 | if (unlikely(f2fs_cp_error(sbi))) { | |
678 | err = -EIO; | |
679 | goto sync_out; | |
973163fc | 680 | } |
7df3a431 FL |
681 | err = __allocate_data_block(&dn); |
682 | if (err) | |
683 | goto sync_out; | |
684 | allocated = true; | |
685 | map->m_flags |= F2FS_MAP_NEW; | |
686 | blkaddr = dn.data_blkaddr; | |
687 | } else { | |
688 | /* | |
689 | * we only merge preallocated unwritten blocks | |
690 | * for fiemap. | |
691 | */ | |
692 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
693 | blkaddr != NEW_ADDR) | |
694 | goto sync_out; | |
bfad7c2d | 695 | } |
7df3a431 | 696 | } |
973163fc | 697 | |
7df3a431 FL |
698 | /* Give more consecutive addresses for the readahead */ |
699 | if ((map->m_pblk != NEW_ADDR && | |
700 | blkaddr == (map->m_pblk + ofs)) || | |
701 | (map->m_pblk == NEW_ADDR && | |
702 | blkaddr == NEW_ADDR)) { | |
703 | ofs++; | |
704 | dn.ofs_in_node++; | |
705 | pgofs++; | |
706 | map->m_len++; | |
707 | goto get_next; | |
eb47b800 | 708 | } |
7df3a431 | 709 | |
bfad7c2d JK |
710 | sync_out: |
711 | if (allocated) | |
712 | sync_inode_page(&dn); | |
713 | put_out: | |
eb47b800 | 714 | f2fs_put_dnode(&dn); |
bfad7c2d | 715 | unlock_out: |
2a340760 | 716 | if (create) { |
3104af35 | 717 | f2fs_unlock_op(sbi); |
2c4db1a6 | 718 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 719 | } |
bfad7c2d | 720 | out: |
003a3e1d | 721 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 722 | return err; |
eb47b800 JK |
723 | } |
724 | ||
003a3e1d | 725 | static int __get_data_block(struct inode *inode, sector_t iblock, |
e2b4e2bc | 726 | struct buffer_head *bh, int create, int flag) |
003a3e1d JK |
727 | { |
728 | struct f2fs_map_blocks map; | |
729 | int ret; | |
730 | ||
731 | map.m_lblk = iblock; | |
732 | map.m_len = bh->b_size >> inode->i_blkbits; | |
733 | ||
e2b4e2bc | 734 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
735 | if (!ret) { |
736 | map_bh(bh, inode->i_sb, map.m_pblk); | |
737 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
738 | bh->b_size = map.m_len << inode->i_blkbits; | |
739 | } | |
740 | return ret; | |
741 | } | |
742 | ||
ccfb3000 | 743 | static int get_data_block(struct inode *inode, sector_t iblock, |
e2b4e2bc CY |
744 | struct buffer_head *bh_result, int create, int flag) |
745 | { | |
746 | return __get_data_block(inode, iblock, bh_result, create, flag); | |
747 | } | |
748 | ||
749 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
750 | struct buffer_head *bh_result, int create) |
751 | { | |
e2b4e2bc CY |
752 | return __get_data_block(inode, iblock, bh_result, create, |
753 | F2FS_GET_BLOCK_DIO); | |
ccfb3000 JK |
754 | } |
755 | ||
e2b4e2bc | 756 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
757 | struct buffer_head *bh_result, int create) |
758 | { | |
179448bf | 759 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 760 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
761 | return -EFBIG; |
762 | ||
e2b4e2bc CY |
763 | return __get_data_block(inode, iblock, bh_result, create, |
764 | F2FS_GET_BLOCK_BMAP); | |
ccfb3000 JK |
765 | } |
766 | ||
7f63eb77 JK |
767 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
768 | { | |
769 | return (offset >> inode->i_blkbits); | |
770 | } | |
771 | ||
772 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
773 | { | |
774 | return (blk << inode->i_blkbits); | |
775 | } | |
776 | ||
9ab70134 JK |
777 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
778 | u64 start, u64 len) | |
779 | { | |
7f63eb77 JK |
780 | struct buffer_head map_bh; |
781 | sector_t start_blk, last_blk; | |
de1475cc | 782 | loff_t isize; |
7f63eb77 JK |
783 | u64 logical = 0, phys = 0, size = 0; |
784 | u32 flags = 0; | |
7f63eb77 JK |
785 | int ret = 0; |
786 | ||
787 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
788 | if (ret) | |
789 | return ret; | |
790 | ||
67f8cf3c JK |
791 | if (f2fs_has_inline_data(inode)) { |
792 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
793 | if (ret != -EAGAIN) | |
794 | return ret; | |
795 | } | |
796 | ||
5955102c | 797 | inode_lock(inode); |
de1475cc FL |
798 | |
799 | isize = i_size_read(inode); | |
9a950d52 FL |
800 | if (start >= isize) |
801 | goto out; | |
7f63eb77 | 802 | |
9a950d52 FL |
803 | if (start + len > isize) |
804 | len = isize - start; | |
7f63eb77 JK |
805 | |
806 | if (logical_to_blk(inode, len) == 0) | |
807 | len = blk_to_logical(inode, 1); | |
808 | ||
809 | start_blk = logical_to_blk(inode, start); | |
810 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 811 | |
7f63eb77 JK |
812 | next: |
813 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
814 | map_bh.b_size = len; | |
815 | ||
e2b4e2bc CY |
816 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
817 | F2FS_GET_BLOCK_FIEMAP); | |
7f63eb77 JK |
818 | if (ret) |
819 | goto out; | |
820 | ||
821 | /* HOLE */ | |
822 | if (!buffer_mapped(&map_bh)) { | |
9a950d52 FL |
823 | /* Go through holes util pass the EOF */ |
824 | if (blk_to_logical(inode, start_blk++) < isize) | |
825 | goto prep_next; | |
826 | /* Found a hole beyond isize means no more extents. | |
827 | * Note that the premise is that filesystems don't | |
828 | * punch holes beyond isize and keep size unchanged. | |
829 | */ | |
830 | flags |= FIEMAP_EXTENT_LAST; | |
831 | } | |
7f63eb77 | 832 | |
da5af127 CY |
833 | if (size) { |
834 | if (f2fs_encrypted_inode(inode)) | |
835 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
836 | ||
9a950d52 FL |
837 | ret = fiemap_fill_next_extent(fieinfo, logical, |
838 | phys, size, flags); | |
da5af127 | 839 | } |
7f63eb77 | 840 | |
9a950d52 FL |
841 | if (start_blk > last_blk || ret) |
842 | goto out; | |
7f63eb77 | 843 | |
9a950d52 FL |
844 | logical = blk_to_logical(inode, start_blk); |
845 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
846 | size = map_bh.b_size; | |
847 | flags = 0; | |
848 | if (buffer_unwritten(&map_bh)) | |
849 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 850 | |
9a950d52 | 851 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 852 | |
9a950d52 | 853 | prep_next: |
7f63eb77 JK |
854 | cond_resched(); |
855 | if (fatal_signal_pending(current)) | |
856 | ret = -EINTR; | |
857 | else | |
858 | goto next; | |
859 | out: | |
860 | if (ret == 1) | |
861 | ret = 0; | |
862 | ||
5955102c | 863 | inode_unlock(inode); |
7f63eb77 | 864 | return ret; |
9ab70134 JK |
865 | } |
866 | ||
f1e88660 JK |
867 | /* |
868 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
869 | * Major change was from block_size == page_size in f2fs by default. | |
870 | */ | |
871 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
872 | struct list_head *pages, struct page *page, | |
873 | unsigned nr_pages) | |
874 | { | |
875 | struct bio *bio = NULL; | |
876 | unsigned page_idx; | |
877 | sector_t last_block_in_bio = 0; | |
878 | struct inode *inode = mapping->host; | |
879 | const unsigned blkbits = inode->i_blkbits; | |
880 | const unsigned blocksize = 1 << blkbits; | |
881 | sector_t block_in_file; | |
882 | sector_t last_block; | |
883 | sector_t last_block_in_file; | |
884 | sector_t block_nr; | |
885 | struct block_device *bdev = inode->i_sb->s_bdev; | |
886 | struct f2fs_map_blocks map; | |
887 | ||
888 | map.m_pblk = 0; | |
889 | map.m_lblk = 0; | |
890 | map.m_len = 0; | |
891 | map.m_flags = 0; | |
892 | ||
893 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
894 | ||
895 | prefetchw(&page->flags); | |
896 | if (pages) { | |
897 | page = list_entry(pages->prev, struct page, lru); | |
898 | list_del(&page->lru); | |
899 | if (add_to_page_cache_lru(page, mapping, | |
900 | page->index, GFP_KERNEL)) | |
901 | goto next_page; | |
902 | } | |
903 | ||
904 | block_in_file = (sector_t)page->index; | |
905 | last_block = block_in_file + nr_pages; | |
906 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
907 | blkbits; | |
908 | if (last_block > last_block_in_file) | |
909 | last_block = last_block_in_file; | |
910 | ||
911 | /* | |
912 | * Map blocks using the previous result first. | |
913 | */ | |
914 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
915 | block_in_file > map.m_lblk && | |
916 | block_in_file < (map.m_lblk + map.m_len)) | |
917 | goto got_it; | |
918 | ||
919 | /* | |
920 | * Then do more f2fs_map_blocks() calls until we are | |
921 | * done with this page. | |
922 | */ | |
923 | map.m_flags = 0; | |
924 | ||
925 | if (block_in_file < last_block) { | |
926 | map.m_lblk = block_in_file; | |
927 | map.m_len = last_block - block_in_file; | |
928 | ||
46c9e141 CY |
929 | if (f2fs_map_blocks(inode, &map, 0, |
930 | F2FS_GET_BLOCK_READ)) | |
f1e88660 JK |
931 | goto set_error_page; |
932 | } | |
933 | got_it: | |
934 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
935 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
936 | SetPageMappedToDisk(page); | |
937 | ||
938 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
939 | SetPageUptodate(page); | |
940 | goto confused; | |
941 | } | |
942 | } else { | |
943 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
944 | SetPageUptodate(page); | |
945 | unlock_page(page); | |
946 | goto next_page; | |
947 | } | |
948 | ||
949 | /* | |
950 | * This page will go to BIO. Do we need to send this | |
951 | * BIO off first? | |
952 | */ | |
953 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
954 | submit_and_realloc: | |
955 | submit_bio(READ, bio); | |
956 | bio = NULL; | |
957 | } | |
958 | if (bio == NULL) { | |
4375a336 JK |
959 | struct f2fs_crypto_ctx *ctx = NULL; |
960 | ||
961 | if (f2fs_encrypted_inode(inode) && | |
962 | S_ISREG(inode->i_mode)) { | |
4375a336 JK |
963 | |
964 | ctx = f2fs_get_crypto_ctx(inode); | |
965 | if (IS_ERR(ctx)) | |
966 | goto set_error_page; | |
967 | ||
968 | /* wait the page to be moved by cleaning */ | |
08b39fbd CY |
969 | f2fs_wait_on_encrypted_page_writeback( |
970 | F2FS_I_SB(inode), block_nr); | |
4375a336 JK |
971 | } |
972 | ||
f1e88660 | 973 | bio = bio_alloc(GFP_KERNEL, |
b54ffb73 | 974 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
4375a336 JK |
975 | if (!bio) { |
976 | if (ctx) | |
977 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 978 | goto set_error_page; |
4375a336 | 979 | } |
f1e88660 JK |
980 | bio->bi_bdev = bdev; |
981 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 982 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 983 | bio->bi_private = ctx; |
f1e88660 JK |
984 | } |
985 | ||
986 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
987 | goto submit_and_realloc; | |
988 | ||
989 | last_block_in_bio = block_nr; | |
990 | goto next_page; | |
991 | set_error_page: | |
992 | SetPageError(page); | |
993 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
994 | unlock_page(page); | |
995 | goto next_page; | |
996 | confused: | |
997 | if (bio) { | |
998 | submit_bio(READ, bio); | |
999 | bio = NULL; | |
1000 | } | |
1001 | unlock_page(page); | |
1002 | next_page: | |
1003 | if (pages) | |
1004 | page_cache_release(page); | |
1005 | } | |
1006 | BUG_ON(pages && !list_empty(pages)); | |
1007 | if (bio) | |
1008 | submit_bio(READ, bio); | |
1009 | return 0; | |
1010 | } | |
1011 | ||
eb47b800 JK |
1012 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1013 | { | |
9ffe0fb5 | 1014 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1015 | int ret = -EAGAIN; |
9ffe0fb5 | 1016 | |
c20e89cd CY |
1017 | trace_f2fs_readpage(page, DATA); |
1018 | ||
e1c42045 | 1019 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1020 | if (f2fs_has_inline_data(inode)) |
1021 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1022 | if (ret == -EAGAIN) |
f1e88660 | 1023 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1024 | return ret; |
eb47b800 JK |
1025 | } |
1026 | ||
1027 | static int f2fs_read_data_pages(struct file *file, | |
1028 | struct address_space *mapping, | |
1029 | struct list_head *pages, unsigned nr_pages) | |
1030 | { | |
9ffe0fb5 | 1031 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1032 | struct page *page = list_entry(pages->prev, struct page, lru); |
1033 | ||
1034 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1035 | |
1036 | /* If the file has inline data, skip readpages */ | |
1037 | if (f2fs_has_inline_data(inode)) | |
1038 | return 0; | |
1039 | ||
f1e88660 | 1040 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1041 | } |
1042 | ||
05ca3632 | 1043 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1044 | { |
05ca3632 | 1045 | struct page *page = fio->page; |
eb47b800 | 1046 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1047 | struct dnode_of_data dn; |
1048 | int err = 0; | |
1049 | ||
1050 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1051 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1052 | if (err) |
1053 | return err; | |
1054 | ||
cf04e8eb | 1055 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
1056 | |
1057 | /* This page is already truncated */ | |
2bca1e23 JK |
1058 | if (fio->blk_addr == NULL_ADDR) { |
1059 | ClearPageUptodate(page); | |
eb47b800 | 1060 | goto out_writepage; |
2bca1e23 | 1061 | } |
eb47b800 | 1062 | |
4375a336 | 1063 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
08b39fbd CY |
1064 | |
1065 | /* wait for GCed encrypted page writeback */ | |
1066 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
1067 | fio->blk_addr); | |
1068 | ||
4375a336 JK |
1069 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); |
1070 | if (IS_ERR(fio->encrypted_page)) { | |
1071 | err = PTR_ERR(fio->encrypted_page); | |
1072 | goto out_writepage; | |
1073 | } | |
1074 | } | |
1075 | ||
eb47b800 JK |
1076 | set_page_writeback(page); |
1077 | ||
1078 | /* | |
1079 | * If current allocation needs SSR, | |
1080 | * it had better in-place writes for updated data. | |
1081 | */ | |
cf04e8eb | 1082 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 | 1083 | !is_cold_data(page) && |
2da3e027 | 1084 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1085 | need_inplace_update(inode))) { |
05ca3632 | 1086 | rewrite_data_page(fio); |
fff04f90 | 1087 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1088 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1089 | } else { |
05ca3632 | 1090 | write_data_page(&dn, fio); |
216a620a | 1091 | set_data_blkaddr(&dn); |
7e4dde79 | 1092 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1093 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1094 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1095 | if (page->index == 0) |
1096 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1097 | } |
1098 | out_writepage: | |
1099 | f2fs_put_dnode(&dn); | |
1100 | return err; | |
1101 | } | |
1102 | ||
1103 | static int f2fs_write_data_page(struct page *page, | |
1104 | struct writeback_control *wbc) | |
1105 | { | |
1106 | struct inode *inode = page->mapping->host; | |
4081363f | 1107 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1108 | loff_t i_size = i_size_read(inode); |
1109 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1110 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1111 | unsigned offset = 0; |
39936837 | 1112 | bool need_balance_fs = false; |
eb47b800 | 1113 | int err = 0; |
458e6197 | 1114 | struct f2fs_io_info fio = { |
05ca3632 | 1115 | .sbi = sbi, |
458e6197 | 1116 | .type = DATA, |
6c311ec6 | 1117 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1118 | .page = page, |
4375a336 | 1119 | .encrypted_page = NULL, |
458e6197 | 1120 | }; |
eb47b800 | 1121 | |
ecda0de3 CY |
1122 | trace_f2fs_writepage(page, DATA); |
1123 | ||
eb47b800 | 1124 | if (page->index < end_index) |
39936837 | 1125 | goto write; |
eb47b800 JK |
1126 | |
1127 | /* | |
1128 | * If the offset is out-of-range of file size, | |
1129 | * this page does not have to be written to disk. | |
1130 | */ | |
1131 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1132 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1133 | goto out; |
eb47b800 JK |
1134 | |
1135 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1136 | write: |
caf0047e | 1137 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1138 | goto redirty_out; |
1e84371f JK |
1139 | if (f2fs_is_drop_cache(inode)) |
1140 | goto out; | |
1141 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1142 | available_free_memory(sbi, BASE_CHECK)) | |
1143 | goto redirty_out; | |
eb47b800 | 1144 | |
39936837 | 1145 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1146 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1147 | if (unlikely(f2fs_cp_error(sbi))) |
1148 | goto redirty_out; | |
05ca3632 | 1149 | err = do_write_data_page(&fio); |
8618b881 JK |
1150 | goto done; |
1151 | } | |
9ffe0fb5 | 1152 | |
cf779cab JK |
1153 | /* we should bypass data pages to proceed the kworkder jobs */ |
1154 | if (unlikely(f2fs_cp_error(sbi))) { | |
1155 | SetPageError(page); | |
a7ffdbe2 | 1156 | goto out; |
cf779cab JK |
1157 | } |
1158 | ||
8618b881 | 1159 | if (!wbc->for_reclaim) |
39936837 | 1160 | need_balance_fs = true; |
8618b881 | 1161 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1162 | goto redirty_out; |
eb47b800 | 1163 | |
b3d208f9 | 1164 | err = -EAGAIN; |
8618b881 | 1165 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1166 | if (f2fs_has_inline_data(inode)) |
1167 | err = f2fs_write_inline_data(inode, page); | |
1168 | if (err == -EAGAIN) | |
05ca3632 | 1169 | err = do_write_data_page(&fio); |
8618b881 JK |
1170 | f2fs_unlock_op(sbi); |
1171 | done: | |
1172 | if (err && err != -ENOENT) | |
1173 | goto redirty_out; | |
eb47b800 | 1174 | |
eb47b800 | 1175 | clear_cold_data(page); |
39936837 | 1176 | out: |
a7ffdbe2 | 1177 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1178 | if (err) |
1179 | ClearPageUptodate(page); | |
eb47b800 | 1180 | unlock_page(page); |
2c4db1a6 | 1181 | f2fs_balance_fs(sbi, need_balance_fs); |
8d4ea29b | 1182 | if (wbc->for_reclaim || unlikely(f2fs_cp_error(sbi))) { |
2aea39ec | 1183 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
c227f912 | 1184 | remove_dirty_inode(inode); |
eb7e813c | 1185 | } |
eb47b800 JK |
1186 | return 0; |
1187 | ||
eb47b800 | 1188 | redirty_out: |
76f60268 | 1189 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1190 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1191 | } |
1192 | ||
fa9150a8 NJ |
1193 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1194 | void *data) | |
1195 | { | |
1196 | struct address_space *mapping = data; | |
1197 | int ret = mapping->a_ops->writepage(page, wbc); | |
1198 | mapping_set_error(mapping, ret); | |
1199 | return ret; | |
1200 | } | |
1201 | ||
8f46dcae CY |
1202 | /* |
1203 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1204 | * The major change is making write step of cold data page separately from | |
1205 | * warm/hot data page. | |
1206 | */ | |
1207 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1208 | struct writeback_control *wbc, writepage_t writepage, | |
1209 | void *data) | |
1210 | { | |
1211 | int ret = 0; | |
1212 | int done = 0; | |
1213 | struct pagevec pvec; | |
1214 | int nr_pages; | |
1215 | pgoff_t uninitialized_var(writeback_index); | |
1216 | pgoff_t index; | |
1217 | pgoff_t end; /* Inclusive */ | |
1218 | pgoff_t done_index; | |
1219 | int cycled; | |
1220 | int range_whole = 0; | |
1221 | int tag; | |
1222 | int step = 0; | |
1223 | ||
1224 | pagevec_init(&pvec, 0); | |
1225 | next: | |
1226 | if (wbc->range_cyclic) { | |
1227 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1228 | index = writeback_index; | |
1229 | if (index == 0) | |
1230 | cycled = 1; | |
1231 | else | |
1232 | cycled = 0; | |
1233 | end = -1; | |
1234 | } else { | |
1235 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1236 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1237 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1238 | range_whole = 1; | |
1239 | cycled = 1; /* ignore range_cyclic tests */ | |
1240 | } | |
1241 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1242 | tag = PAGECACHE_TAG_TOWRITE; | |
1243 | else | |
1244 | tag = PAGECACHE_TAG_DIRTY; | |
1245 | retry: | |
1246 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1247 | tag_pages_for_writeback(mapping, index, end); | |
1248 | done_index = index; | |
1249 | while (!done && (index <= end)) { | |
1250 | int i; | |
1251 | ||
1252 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1253 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1254 | if (nr_pages == 0) | |
1255 | break; | |
1256 | ||
1257 | for (i = 0; i < nr_pages; i++) { | |
1258 | struct page *page = pvec.pages[i]; | |
1259 | ||
1260 | if (page->index > end) { | |
1261 | done = 1; | |
1262 | break; | |
1263 | } | |
1264 | ||
1265 | done_index = page->index; | |
1266 | ||
1267 | lock_page(page); | |
1268 | ||
1269 | if (unlikely(page->mapping != mapping)) { | |
1270 | continue_unlock: | |
1271 | unlock_page(page); | |
1272 | continue; | |
1273 | } | |
1274 | ||
1275 | if (!PageDirty(page)) { | |
1276 | /* someone wrote it for us */ | |
1277 | goto continue_unlock; | |
1278 | } | |
1279 | ||
737f1899 | 1280 | if (step == is_cold_data(page)) |
8f46dcae CY |
1281 | goto continue_unlock; |
1282 | ||
1283 | if (PageWriteback(page)) { | |
1284 | if (wbc->sync_mode != WB_SYNC_NONE) | |
1285 | f2fs_wait_on_page_writeback(page, DATA); | |
1286 | else | |
1287 | goto continue_unlock; | |
1288 | } | |
1289 | ||
1290 | BUG_ON(PageWriteback(page)); | |
1291 | if (!clear_page_dirty_for_io(page)) | |
1292 | goto continue_unlock; | |
1293 | ||
1294 | ret = (*writepage)(page, wbc, data); | |
1295 | if (unlikely(ret)) { | |
1296 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1297 | unlock_page(page); | |
1298 | ret = 0; | |
1299 | } else { | |
1300 | done_index = page->index + 1; | |
1301 | done = 1; | |
1302 | break; | |
1303 | } | |
1304 | } | |
1305 | ||
1306 | if (--wbc->nr_to_write <= 0 && | |
1307 | wbc->sync_mode == WB_SYNC_NONE) { | |
1308 | done = 1; | |
1309 | break; | |
1310 | } | |
1311 | } | |
1312 | pagevec_release(&pvec); | |
1313 | cond_resched(); | |
1314 | } | |
1315 | ||
1316 | if (step < 1) { | |
1317 | step++; | |
1318 | goto next; | |
1319 | } | |
1320 | ||
1321 | if (!cycled && !done) { | |
1322 | cycled = 1; | |
1323 | index = 0; | |
1324 | end = writeback_index - 1; | |
1325 | goto retry; | |
1326 | } | |
1327 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1328 | mapping->writeback_index = done_index; | |
1329 | ||
1330 | return ret; | |
1331 | } | |
1332 | ||
25ca923b | 1333 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1334 | struct writeback_control *wbc) |
1335 | { | |
1336 | struct inode *inode = mapping->host; | |
4081363f | 1337 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1338 | bool locked = false; |
eb47b800 | 1339 | int ret; |
50c8cdb3 | 1340 | long diff; |
eb47b800 | 1341 | |
e5748434 CY |
1342 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1343 | ||
cfb185a1 | 1344 | /* deal with chardevs and other special file */ |
1345 | if (!mapping->a_ops->writepage) | |
1346 | return 0; | |
1347 | ||
6a290544 CY |
1348 | /* skip writing if there is no dirty page in this inode */ |
1349 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1350 | return 0; | |
1351 | ||
a1257023 JK |
1352 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1353 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1354 | available_free_memory(sbi, DIRTY_DENTS)) | |
1355 | goto skip_write; | |
1356 | ||
d323d005 CY |
1357 | /* skip writing during file defragment */ |
1358 | if (is_inode_flag_set(F2FS_I(inode), FI_DO_DEFRAG)) | |
1359 | goto skip_write; | |
1360 | ||
d5669f7b JK |
1361 | /* during POR, we don't need to trigger writepage at all. */ |
1362 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1363 | goto skip_write; | |
1364 | ||
50c8cdb3 | 1365 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1366 | |
5463e7c1 JK |
1367 | if (!S_ISDIR(inode->i_mode)) { |
1368 | mutex_lock(&sbi->writepages); | |
1369 | locked = true; | |
1370 | } | |
8f46dcae | 1371 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
bb96a8d5 | 1372 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
5463e7c1 JK |
1373 | if (locked) |
1374 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1375 | |
c227f912 | 1376 | remove_dirty_inode(inode); |
eb47b800 | 1377 | |
50c8cdb3 | 1378 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1379 | return ret; |
d3baf95d JK |
1380 | |
1381 | skip_write: | |
a7ffdbe2 | 1382 | wbc->pages_skipped += get_dirty_pages(inode); |
d3baf95d | 1383 | return 0; |
eb47b800 JK |
1384 | } |
1385 | ||
3aab8f82 CY |
1386 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1387 | { | |
1388 | struct inode *inode = mapping->host; | |
819d9153 | 1389 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1390 | |
819d9153 JK |
1391 | if (to > i_size) { |
1392 | truncate_pagecache(inode, i_size); | |
1393 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1394 | } |
1395 | } | |
1396 | ||
2aadac08 JK |
1397 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1398 | struct page *page, loff_t pos, unsigned len, | |
1399 | block_t *blk_addr, bool *node_changed) | |
1400 | { | |
1401 | struct inode *inode = page->mapping->host; | |
1402 | pgoff_t index = page->index; | |
1403 | struct dnode_of_data dn; | |
1404 | struct page *ipage; | |
b4d07a3e JK |
1405 | bool locked = false; |
1406 | struct extent_info ei; | |
2aadac08 JK |
1407 | int err = 0; |
1408 | ||
b4d07a3e JK |
1409 | if (f2fs_has_inline_data(inode) || |
1410 | (pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1411 | f2fs_lock_op(sbi); | |
1412 | locked = true; | |
1413 | } | |
1414 | restart: | |
2aadac08 JK |
1415 | /* check inline_data */ |
1416 | ipage = get_node_page(sbi, inode->i_ino); | |
1417 | if (IS_ERR(ipage)) { | |
1418 | err = PTR_ERR(ipage); | |
1419 | goto unlock_out; | |
1420 | } | |
1421 | ||
1422 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1423 | ||
1424 | if (f2fs_has_inline_data(inode)) { | |
1425 | if (pos + len <= MAX_INLINE_DATA) { | |
1426 | read_inline_data(page, ipage); | |
1427 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
1428 | sync_inode_page(&dn); | |
2aadac08 JK |
1429 | } else { |
1430 | err = f2fs_convert_inline_page(&dn, page); | |
1431 | if (err) | |
b4d07a3e JK |
1432 | goto out; |
1433 | if (dn.data_blkaddr == NULL_ADDR) | |
1434 | err = f2fs_get_block(&dn, index); | |
1435 | } | |
1436 | } else if (locked) { | |
1437 | err = f2fs_get_block(&dn, index); | |
1438 | } else { | |
1439 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1440 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1441 | } else { | |
1442 | bool restart = false; | |
1443 | ||
1444 | /* hole case */ | |
1445 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
1446 | if (err || (!err && dn.data_blkaddr == NULL_ADDR)) | |
1447 | restart = true; | |
1448 | if (restart) { | |
1449 | f2fs_put_dnode(&dn); | |
1450 | f2fs_lock_op(sbi); | |
1451 | locked = true; | |
1452 | goto restart; | |
1453 | } | |
2aadac08 JK |
1454 | } |
1455 | } | |
b4d07a3e | 1456 | |
2aadac08 JK |
1457 | /* convert_inline_page can make node_changed */ |
1458 | *blk_addr = dn.data_blkaddr; | |
1459 | *node_changed = dn.node_changed; | |
b4d07a3e | 1460 | out: |
2aadac08 JK |
1461 | f2fs_put_dnode(&dn); |
1462 | unlock_out: | |
b4d07a3e JK |
1463 | if (locked) |
1464 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1465 | return err; |
1466 | } | |
1467 | ||
eb47b800 JK |
1468 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1469 | loff_t pos, unsigned len, unsigned flags, | |
1470 | struct page **pagep, void **fsdata) | |
1471 | { | |
1472 | struct inode *inode = mapping->host; | |
4081363f | 1473 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1474 | struct page *page = NULL; |
eb47b800 | 1475 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
2aadac08 JK |
1476 | bool need_balance = false; |
1477 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1478 | int err = 0; |
1479 | ||
62aed044 CY |
1480 | trace_f2fs_write_begin(inode, pos, len, flags); |
1481 | ||
5f727395 JK |
1482 | /* |
1483 | * We should check this at this moment to avoid deadlock on inode page | |
1484 | * and #0 page. The locking rule for inline_data conversion should be: | |
1485 | * lock_page(page #0) -> lock_page(inode_page) | |
1486 | */ | |
1487 | if (index != 0) { | |
1488 | err = f2fs_convert_inline_inode(inode); | |
1489 | if (err) | |
1490 | goto fail; | |
1491 | } | |
afcb7ca0 | 1492 | repeat: |
eb47b800 | 1493 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1494 | if (!page) { |
1495 | err = -ENOMEM; | |
1496 | goto fail; | |
1497 | } | |
d5f66990 | 1498 | |
eb47b800 JK |
1499 | *pagep = page; |
1500 | ||
2aadac08 JK |
1501 | err = prepare_write_begin(sbi, page, pos, len, |
1502 | &blkaddr, &need_balance); | |
9ba69cf9 | 1503 | if (err) |
2aadac08 | 1504 | goto fail; |
9ba69cf9 | 1505 | |
2aadac08 | 1506 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 | 1507 | unlock_page(page); |
2c4db1a6 | 1508 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1509 | lock_page(page); |
1510 | if (page->mapping != mapping) { | |
1511 | /* The page got truncated from under us */ | |
1512 | f2fs_put_page(page, 1); | |
1513 | goto repeat; | |
1514 | } | |
1515 | } | |
1516 | ||
b3d208f9 JK |
1517 | f2fs_wait_on_page_writeback(page, DATA); |
1518 | ||
08b39fbd CY |
1519 | /* wait for GCed encrypted page writeback */ |
1520 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1521 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1522 | |
90d4388a CY |
1523 | if (len == PAGE_CACHE_SIZE) |
1524 | goto out_update; | |
1525 | if (PageUptodate(page)) | |
1526 | goto out_clear; | |
eb47b800 JK |
1527 | |
1528 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1529 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1530 | unsigned end = start + len; | |
1531 | ||
1532 | /* Reading beyond i_size is simple: memset to zero */ | |
1533 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
90d4388a | 1534 | goto out_update; |
eb47b800 JK |
1535 | } |
1536 | ||
2aadac08 | 1537 | if (blkaddr == NEW_ADDR) { |
eb47b800 JK |
1538 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1539 | } else { | |
cf04e8eb | 1540 | struct f2fs_io_info fio = { |
05ca3632 | 1541 | .sbi = sbi, |
cf04e8eb JK |
1542 | .type = DATA, |
1543 | .rw = READ_SYNC, | |
2aadac08 | 1544 | .blk_addr = blkaddr, |
05ca3632 | 1545 | .page = page, |
4375a336 | 1546 | .encrypted_page = NULL, |
cf04e8eb | 1547 | }; |
05ca3632 | 1548 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1549 | if (err) |
1550 | goto fail; | |
d54c795b | 1551 | |
393ff91f | 1552 | lock_page(page); |
6bacf52f | 1553 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1554 | err = -EIO; |
1555 | goto fail; | |
eb47b800 | 1556 | } |
6bacf52f | 1557 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1558 | f2fs_put_page(page, 1); |
1559 | goto repeat; | |
eb47b800 | 1560 | } |
4375a336 JK |
1561 | |
1562 | /* avoid symlink page */ | |
1563 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1564 | err = f2fs_decrypt_one(inode, page); | |
86531d6b | 1565 | if (err) |
4375a336 | 1566 | goto fail; |
4375a336 | 1567 | } |
eb47b800 | 1568 | } |
90d4388a | 1569 | out_update: |
eb47b800 | 1570 | SetPageUptodate(page); |
90d4388a | 1571 | out_clear: |
eb47b800 JK |
1572 | clear_cold_data(page); |
1573 | return 0; | |
9ba69cf9 | 1574 | |
3aab8f82 | 1575 | fail: |
86531d6b | 1576 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1577 | f2fs_write_failed(mapping, pos + len); |
1578 | return err; | |
eb47b800 JK |
1579 | } |
1580 | ||
a1dd3c13 JK |
1581 | static int f2fs_write_end(struct file *file, |
1582 | struct address_space *mapping, | |
1583 | loff_t pos, unsigned len, unsigned copied, | |
1584 | struct page *page, void *fsdata) | |
1585 | { | |
1586 | struct inode *inode = page->mapping->host; | |
1587 | ||
dfb2bf38 CY |
1588 | trace_f2fs_write_end(inode, pos, len, copied); |
1589 | ||
34ba94ba | 1590 | set_page_dirty(page); |
a1dd3c13 JK |
1591 | |
1592 | if (pos + copied > i_size_read(inode)) { | |
1593 | i_size_write(inode, pos + copied); | |
1594 | mark_inode_dirty(inode); | |
1595 | update_inode_page(inode); | |
1596 | } | |
1597 | ||
75c3c8bc | 1598 | f2fs_put_page(page, 1); |
d0239e1b | 1599 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1600 | return copied; |
1601 | } | |
1602 | ||
6f673763 OS |
1603 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1604 | loff_t offset) | |
944fcfc1 JK |
1605 | { |
1606 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1607 | |
944fcfc1 JK |
1608 | if (offset & blocksize_mask) |
1609 | return -EINVAL; | |
1610 | ||
5b46f25d AV |
1611 | if (iov_iter_alignment(iter) & blocksize_mask) |
1612 | return -EINVAL; | |
1613 | ||
944fcfc1 JK |
1614 | return 0; |
1615 | } | |
1616 | ||
22c6186e OS |
1617 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1618 | loff_t offset) | |
eb47b800 JK |
1619 | { |
1620 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1621 | struct address_space *mapping = file->f_mapping; |
1622 | struct inode *inode = mapping->host; | |
1623 | size_t count = iov_iter_count(iter); | |
1624 | int err; | |
944fcfc1 | 1625 | |
b3d208f9 | 1626 | /* we don't need to use inline_data strictly */ |
b9d777b8 JK |
1627 | err = f2fs_convert_inline_inode(inode); |
1628 | if (err) | |
1629 | return err; | |
9ffe0fb5 | 1630 | |
fcc85a4d JK |
1631 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1632 | return 0; | |
1633 | ||
c15e8599 CY |
1634 | err = check_direct_IO(inode, iter, offset); |
1635 | if (err) | |
1636 | return err; | |
944fcfc1 | 1637 | |
6f673763 | 1638 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1639 | |
f9811703 | 1640 | if (iov_iter_rw(iter) == WRITE) { |
6d5a1495 CY |
1641 | err = __allocate_data_blocks(inode, offset, count); |
1642 | if (err) | |
f9811703 | 1643 | goto out; |
f9811703 | 1644 | } |
59b802e5 | 1645 | |
e2b4e2bc | 1646 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
f9811703 | 1647 | out: |
6f673763 | 1648 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1649 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1650 | |
6f673763 | 1651 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1652 | |
3aab8f82 | 1653 | return err; |
eb47b800 JK |
1654 | } |
1655 | ||
487261f3 CY |
1656 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1657 | unsigned int length) | |
eb47b800 JK |
1658 | { |
1659 | struct inode *inode = page->mapping->host; | |
487261f3 | 1660 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1661 | |
487261f3 CY |
1662 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1663 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1664 | return; |
1665 | ||
487261f3 CY |
1666 | if (PageDirty(page)) { |
1667 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1668 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1669 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1670 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1671 | else | |
1672 | inode_dec_dirty_pages(inode); | |
1673 | } | |
decd36b6 CY |
1674 | |
1675 | /* This is atomic written page, keep Private */ | |
1676 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1677 | return; | |
1678 | ||
eb47b800 JK |
1679 | ClearPagePrivate(page); |
1680 | } | |
1681 | ||
487261f3 | 1682 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1683 | { |
f68daeeb JK |
1684 | /* If this is dirty page, keep PagePrivate */ |
1685 | if (PageDirty(page)) | |
1686 | return 0; | |
1687 | ||
decd36b6 CY |
1688 | /* This is atomic written page, keep Private */ |
1689 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1690 | return 0; | |
1691 | ||
eb47b800 | 1692 | ClearPagePrivate(page); |
c3850aa1 | 1693 | return 1; |
eb47b800 JK |
1694 | } |
1695 | ||
1696 | static int f2fs_set_data_page_dirty(struct page *page) | |
1697 | { | |
1698 | struct address_space *mapping = page->mapping; | |
1699 | struct inode *inode = mapping->host; | |
1700 | ||
26c6b887 JK |
1701 | trace_f2fs_set_page_dirty(page, DATA); |
1702 | ||
eb47b800 | 1703 | SetPageUptodate(page); |
34ba94ba | 1704 | |
1e84371f | 1705 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1706 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1707 | register_inmem_page(inode, page); | |
1708 | return 1; | |
1709 | } | |
1710 | /* | |
1711 | * Previously, this page has been registered, we just | |
1712 | * return here. | |
1713 | */ | |
1714 | return 0; | |
34ba94ba JK |
1715 | } |
1716 | ||
eb47b800 JK |
1717 | if (!PageDirty(page)) { |
1718 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1719 | update_dirty_page(inode, page); |
eb47b800 JK |
1720 | return 1; |
1721 | } | |
1722 | return 0; | |
1723 | } | |
1724 | ||
c01e54b7 JK |
1725 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1726 | { | |
454ae7e5 CY |
1727 | struct inode *inode = mapping->host; |
1728 | ||
1d373a0e JK |
1729 | if (f2fs_has_inline_data(inode)) |
1730 | return 0; | |
1731 | ||
1732 | /* make sure allocating whole blocks */ | |
1733 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1734 | filemap_write_and_wait(mapping); | |
1735 | ||
e2b4e2bc | 1736 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1737 | } |
1738 | ||
eb47b800 JK |
1739 | const struct address_space_operations f2fs_dblock_aops = { |
1740 | .readpage = f2fs_read_data_page, | |
1741 | .readpages = f2fs_read_data_pages, | |
1742 | .writepage = f2fs_write_data_page, | |
1743 | .writepages = f2fs_write_data_pages, | |
1744 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1745 | .write_end = f2fs_write_end, |
eb47b800 | 1746 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1747 | .invalidatepage = f2fs_invalidate_page, |
1748 | .releasepage = f2fs_release_page, | |
eb47b800 | 1749 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1750 | .bmap = f2fs_bmap, |
eb47b800 | 1751 | }; |