Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
f1e88660 | 22 | #include <linux/cleancache.h> |
eb47b800 JK |
23 | |
24 | #include "f2fs.h" | |
25 | #include "node.h" | |
26 | #include "segment.h" | |
db9f7c1a | 27 | #include "trace.h" |
848753aa | 28 | #include <trace/events/f2fs.h> |
eb47b800 | 29 | |
4246a0b6 | 30 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 31 | { |
f568849e LT |
32 | struct bio_vec *bvec; |
33 | int i; | |
93dfe2ac | 34 | |
4375a336 | 35 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 36 | if (bio->bi_error) { |
4375a336 JK |
37 | f2fs_release_crypto_ctx(bio->bi_private); |
38 | } else { | |
39 | f2fs_end_io_crypto_work(bio->bi_private, bio); | |
40 | return; | |
41 | } | |
42 | } | |
43 | ||
12377024 CY |
44 | bio_for_each_segment_all(bvec, bio, i) { |
45 | struct page *page = bvec->bv_page; | |
f1e88660 | 46 | |
4246a0b6 | 47 | if (!bio->bi_error) { |
f1e88660 JK |
48 | SetPageUptodate(page); |
49 | } else { | |
50 | ClearPageUptodate(page); | |
51 | SetPageError(page); | |
52 | } | |
53 | unlock_page(page); | |
54 | } | |
f1e88660 JK |
55 | bio_put(bio); |
56 | } | |
57 | ||
4246a0b6 | 58 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 59 | { |
1b1f559f | 60 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
61 | struct bio_vec *bvec; |
62 | int i; | |
93dfe2ac | 63 | |
f568849e | 64 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
65 | struct page *page = bvec->bv_page; |
66 | ||
4375a336 JK |
67 | f2fs_restore_and_release_control_page(&page); |
68 | ||
4246a0b6 | 69 | if (unlikely(bio->bi_error)) { |
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); |
eb47b800 | 228 | set_page_dirty(node_page); |
93bae099 | 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; | |
01f28610 | 416 | repeat: |
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 | |
a56c7c6f | 445 | page = get_read_data_page(inode, index, READ_SYNC, true); |
4375a336 | 446 | if (IS_ERR(page)) |
afcb7ca0 | 447 | goto repeat; |
4375a336 JK |
448 | |
449 | /* wait for read completion */ | |
450 | lock_page(page); | |
eb47b800 | 451 | } |
01f28610 | 452 | got_it: |
9edcdabf CY |
453 | if (new_i_size && i_size_read(inode) < |
454 | ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)) { | |
455 | i_size_write(inode, ((loff_t)(index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
456 | /* Only the directory inode sets new_i_size */ |
457 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
458 | } |
459 | return page; | |
460 | } | |
461 | ||
bfad7c2d JK |
462 | static int __allocate_data_block(struct dnode_of_data *dn) |
463 | { | |
4081363f | 464 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
976e4c50 | 465 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); |
bfad7c2d | 466 | struct f2fs_summary sum; |
bfad7c2d | 467 | struct node_info ni; |
38aa0889 | 468 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 469 | pgoff_t fofs; |
bfad7c2d JK |
470 | |
471 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
472 | return -EPERM; | |
df6136ef CY |
473 | |
474 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
475 | if (dn->data_blkaddr == NEW_ADDR) | |
476 | goto alloc; | |
477 | ||
bfad7c2d JK |
478 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
479 | return -ENOSPC; | |
480 | ||
df6136ef | 481 | alloc: |
bfad7c2d JK |
482 | get_node_info(sbi, dn->nid, &ni); |
483 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
484 | ||
38aa0889 JK |
485 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
486 | seg = CURSEG_DIRECT_IO; | |
487 | ||
df6136ef CY |
488 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
489 | &sum, seg); | |
216a620a | 490 | set_data_blkaddr(dn); |
bfad7c2d | 491 | |
976e4c50 JK |
492 | /* update i_size */ |
493 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + | |
494 | dn->ofs_in_node; | |
9edcdabf CY |
495 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)) |
496 | i_size_write(dn->inode, | |
497 | ((loff_t)(fofs + 1) << PAGE_CACHE_SHIFT)); | |
bfad7c2d JK |
498 | return 0; |
499 | } | |
500 | ||
6d5a1495 | 501 | static int __allocate_data_blocks(struct inode *inode, loff_t offset, |
59b802e5 JK |
502 | size_t count) |
503 | { | |
504 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
505 | struct dnode_of_data dn; | |
506 | u64 start = F2FS_BYTES_TO_BLK(offset); | |
507 | u64 len = F2FS_BYTES_TO_BLK(count); | |
508 | bool allocated; | |
509 | u64 end_offset; | |
6d5a1495 | 510 | int err = 0; |
59b802e5 JK |
511 | |
512 | while (len) { | |
59b802e5 JK |
513 | f2fs_lock_op(sbi); |
514 | ||
515 | /* When reading holes, we need its node page */ | |
516 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
6d5a1495 CY |
517 | err = get_dnode_of_data(&dn, start, ALLOC_NODE); |
518 | if (err) | |
59b802e5 JK |
519 | goto out; |
520 | ||
521 | allocated = false; | |
522 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); | |
523 | ||
524 | while (dn.ofs_in_node < end_offset && len) { | |
d6d4f1cb CY |
525 | block_t blkaddr; |
526 | ||
6d5a1495 CY |
527 | if (unlikely(f2fs_cp_error(sbi))) { |
528 | err = -EIO; | |
f9811703 | 529 | goto sync_out; |
6d5a1495 | 530 | } |
f9811703 | 531 | |
d6d4f1cb | 532 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
df6136ef | 533 | if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) { |
6d5a1495 CY |
534 | err = __allocate_data_block(&dn); |
535 | if (err) | |
59b802e5 JK |
536 | goto sync_out; |
537 | allocated = true; | |
538 | } | |
539 | len--; | |
540 | start++; | |
541 | dn.ofs_in_node++; | |
542 | } | |
543 | ||
544 | if (allocated) | |
545 | sync_inode_page(&dn); | |
546 | ||
547 | f2fs_put_dnode(&dn); | |
548 | f2fs_unlock_op(sbi); | |
2a340760 JK |
549 | |
550 | if (dn.node_changed) | |
551 | f2fs_balance_fs(sbi); | |
59b802e5 | 552 | } |
6d5a1495 | 553 | return err; |
59b802e5 JK |
554 | |
555 | sync_out: | |
556 | if (allocated) | |
557 | sync_inode_page(&dn); | |
558 | f2fs_put_dnode(&dn); | |
559 | out: | |
560 | f2fs_unlock_op(sbi); | |
2a340760 JK |
561 | if (dn.node_changed) |
562 | f2fs_balance_fs(sbi); | |
6d5a1495 | 563 | return err; |
59b802e5 JK |
564 | } |
565 | ||
0a8165d7 | 566 | /* |
003a3e1d JK |
567 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
568 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
569 | * If original data blocks are allocated, then give them to blockdev. |
570 | * Otherwise, | |
571 | * a. preallocate requested block addresses | |
572 | * b. do not use extent cache for better performance | |
573 | * c. give the block addresses to blockdev | |
eb47b800 | 574 | */ |
d323d005 | 575 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 576 | int create, int flag) |
eb47b800 | 577 | { |
003a3e1d | 578 | unsigned int maxblocks = map->m_len; |
eb47b800 | 579 | struct dnode_of_data dn; |
f9811703 | 580 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
bfad7c2d JK |
581 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
582 | pgoff_t pgofs, end_offset; | |
583 | int err = 0, ofs = 1; | |
a2e7d1bf | 584 | struct extent_info ei; |
bfad7c2d | 585 | bool allocated = false; |
7df3a431 | 586 | block_t blkaddr; |
eb47b800 | 587 | |
003a3e1d JK |
588 | map->m_len = 0; |
589 | map->m_flags = 0; | |
590 | ||
591 | /* it only supports block size == page size */ | |
592 | pgofs = (pgoff_t)map->m_lblk; | |
eb47b800 | 593 | |
7e4dde79 | 594 | if (f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
595 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
596 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
597 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 598 | goto out; |
a2e7d1bf | 599 | } |
bfad7c2d | 600 | |
59b802e5 | 601 | if (create) |
3104af35 | 602 | f2fs_lock_op(sbi); |
eb47b800 JK |
603 | |
604 | /* When reading holes, we need its node page */ | |
605 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 606 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 607 | if (err) { |
bfad7c2d JK |
608 | if (err == -ENOENT) |
609 | err = 0; | |
610 | goto unlock_out; | |
848753aa | 611 | } |
973163fc CY |
612 | |
613 | if (dn.data_blkaddr == NEW_ADDR || dn.data_blkaddr == NULL_ADDR) { | |
614 | if (create) { | |
f9811703 CY |
615 | if (unlikely(f2fs_cp_error(sbi))) { |
616 | err = -EIO; | |
617 | goto put_out; | |
618 | } | |
973163fc CY |
619 | err = __allocate_data_block(&dn); |
620 | if (err) | |
621 | goto put_out; | |
622 | allocated = true; | |
623 | map->m_flags = F2FS_MAP_NEW; | |
624 | } else { | |
625 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
626 | dn.data_blkaddr != NEW_ADDR) { | |
627 | if (flag == F2FS_GET_BLOCK_BMAP) | |
628 | err = -ENOENT; | |
629 | goto put_out; | |
630 | } | |
631 | ||
632 | /* | |
633 | * preallocated unwritten block should be mapped | |
634 | * for fiemap. | |
635 | */ | |
636 | if (dn.data_blkaddr == NEW_ADDR) | |
637 | map->m_flags = F2FS_MAP_UNWRITTEN; | |
e2b4e2bc | 638 | } |
e2b4e2bc | 639 | } |
eb47b800 | 640 | |
973163fc CY |
641 | map->m_flags |= F2FS_MAP_MAPPED; |
642 | map->m_pblk = dn.data_blkaddr; | |
643 | map->m_len = 1; | |
bfad7c2d | 644 | |
6403eb1f | 645 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d JK |
646 | dn.ofs_in_node++; |
647 | pgofs++; | |
648 | ||
649 | get_next: | |
7df3a431 FL |
650 | if (map->m_len >= maxblocks) |
651 | goto sync_out; | |
652 | ||
bfad7c2d JK |
653 | if (dn.ofs_in_node >= end_offset) { |
654 | if (allocated) | |
655 | sync_inode_page(&dn); | |
656 | allocated = false; | |
657 | f2fs_put_dnode(&dn); | |
658 | ||
3104af35 CY |
659 | if (create) { |
660 | f2fs_unlock_op(sbi); | |
2a340760 JK |
661 | if (dn.node_changed) |
662 | f2fs_balance_fs(sbi); | |
3104af35 CY |
663 | f2fs_lock_op(sbi); |
664 | } | |
665 | ||
bfad7c2d JK |
666 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
667 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 668 | if (err) { |
bfad7c2d JK |
669 | if (err == -ENOENT) |
670 | err = 0; | |
671 | goto unlock_out; | |
672 | } | |
e2b4e2bc | 673 | |
6403eb1f | 674 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 675 | } |
eb47b800 | 676 | |
7df3a431 | 677 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); |
973163fc | 678 | |
7df3a431 FL |
679 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { |
680 | if (create) { | |
681 | if (unlikely(f2fs_cp_error(sbi))) { | |
682 | err = -EIO; | |
683 | goto sync_out; | |
973163fc | 684 | } |
7df3a431 FL |
685 | err = __allocate_data_block(&dn); |
686 | if (err) | |
687 | goto sync_out; | |
688 | allocated = true; | |
689 | map->m_flags |= F2FS_MAP_NEW; | |
690 | blkaddr = dn.data_blkaddr; | |
691 | } else { | |
692 | /* | |
693 | * we only merge preallocated unwritten blocks | |
694 | * for fiemap. | |
695 | */ | |
696 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
697 | blkaddr != NEW_ADDR) | |
698 | goto sync_out; | |
bfad7c2d | 699 | } |
7df3a431 | 700 | } |
973163fc | 701 | |
7df3a431 FL |
702 | /* Give more consecutive addresses for the readahead */ |
703 | if ((map->m_pblk != NEW_ADDR && | |
704 | blkaddr == (map->m_pblk + ofs)) || | |
705 | (map->m_pblk == NEW_ADDR && | |
706 | blkaddr == NEW_ADDR)) { | |
707 | ofs++; | |
708 | dn.ofs_in_node++; | |
709 | pgofs++; | |
710 | map->m_len++; | |
711 | goto get_next; | |
eb47b800 | 712 | } |
7df3a431 | 713 | |
bfad7c2d JK |
714 | sync_out: |
715 | if (allocated) | |
716 | sync_inode_page(&dn); | |
717 | put_out: | |
eb47b800 | 718 | f2fs_put_dnode(&dn); |
bfad7c2d | 719 | unlock_out: |
2a340760 | 720 | if (create) { |
3104af35 | 721 | f2fs_unlock_op(sbi); |
2a340760 JK |
722 | if (dn.node_changed) |
723 | f2fs_balance_fs(sbi); | |
724 | } | |
bfad7c2d | 725 | out: |
003a3e1d | 726 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 727 | return err; |
eb47b800 JK |
728 | } |
729 | ||
003a3e1d | 730 | static int __get_data_block(struct inode *inode, sector_t iblock, |
e2b4e2bc | 731 | struct buffer_head *bh, int create, int flag) |
003a3e1d JK |
732 | { |
733 | struct f2fs_map_blocks map; | |
734 | int ret; | |
735 | ||
736 | map.m_lblk = iblock; | |
737 | map.m_len = bh->b_size >> inode->i_blkbits; | |
738 | ||
e2b4e2bc | 739 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
740 | if (!ret) { |
741 | map_bh(bh, inode->i_sb, map.m_pblk); | |
742 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
743 | bh->b_size = map.m_len << inode->i_blkbits; | |
744 | } | |
745 | return ret; | |
746 | } | |
747 | ||
ccfb3000 | 748 | static int get_data_block(struct inode *inode, sector_t iblock, |
e2b4e2bc CY |
749 | struct buffer_head *bh_result, int create, int flag) |
750 | { | |
751 | return __get_data_block(inode, iblock, bh_result, create, flag); | |
752 | } | |
753 | ||
754 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
755 | struct buffer_head *bh_result, int create) |
756 | { | |
e2b4e2bc CY |
757 | return __get_data_block(inode, iblock, bh_result, create, |
758 | F2FS_GET_BLOCK_DIO); | |
ccfb3000 JK |
759 | } |
760 | ||
e2b4e2bc | 761 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
762 | struct buffer_head *bh_result, int create) |
763 | { | |
e2b4e2bc CY |
764 | return __get_data_block(inode, iblock, bh_result, create, |
765 | F2FS_GET_BLOCK_BMAP); | |
ccfb3000 JK |
766 | } |
767 | ||
7f63eb77 JK |
768 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
769 | { | |
770 | return (offset >> inode->i_blkbits); | |
771 | } | |
772 | ||
773 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
774 | { | |
775 | return (blk << inode->i_blkbits); | |
776 | } | |
777 | ||
9ab70134 JK |
778 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
779 | u64 start, u64 len) | |
780 | { | |
7f63eb77 JK |
781 | struct buffer_head map_bh; |
782 | sector_t start_blk, last_blk; | |
783 | loff_t isize = i_size_read(inode); | |
784 | u64 logical = 0, phys = 0, size = 0; | |
785 | u32 flags = 0; | |
786 | bool past_eof = false, whole_file = false; | |
787 | int ret = 0; | |
788 | ||
789 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
790 | if (ret) | |
791 | return ret; | |
792 | ||
67f8cf3c JK |
793 | if (f2fs_has_inline_data(inode)) { |
794 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
795 | if (ret != -EAGAIN) | |
796 | return ret; | |
797 | } | |
798 | ||
7f63eb77 JK |
799 | mutex_lock(&inode->i_mutex); |
800 | ||
801 | if (len >= isize) { | |
802 | whole_file = true; | |
803 | len = isize; | |
804 | } | |
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); | |
811 | next: | |
812 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
813 | map_bh.b_size = len; | |
814 | ||
e2b4e2bc CY |
815 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
816 | F2FS_GET_BLOCK_FIEMAP); | |
7f63eb77 JK |
817 | if (ret) |
818 | goto out; | |
819 | ||
820 | /* HOLE */ | |
821 | if (!buffer_mapped(&map_bh)) { | |
822 | start_blk++; | |
823 | ||
824 | if (!past_eof && blk_to_logical(inode, start_blk) >= isize) | |
825 | past_eof = 1; | |
826 | ||
827 | if (past_eof && size) { | |
828 | flags |= FIEMAP_EXTENT_LAST; | |
829 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
830 | phys, size, flags); | |
831 | } else if (size) { | |
832 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
833 | phys, size, flags); | |
834 | size = 0; | |
835 | } | |
836 | ||
837 | /* if we have holes up to/past EOF then we're done */ | |
838 | if (start_blk > last_blk || past_eof || ret) | |
839 | goto out; | |
840 | } else { | |
841 | if (start_blk > last_blk && !whole_file) { | |
842 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
843 | phys, size, flags); | |
844 | goto out; | |
845 | } | |
846 | ||
847 | /* | |
848 | * if size != 0 then we know we already have an extent | |
849 | * to add, so add it. | |
850 | */ | |
851 | if (size) { | |
852 | ret = fiemap_fill_next_extent(fieinfo, logical, | |
853 | phys, size, flags); | |
854 | if (ret) | |
855 | goto out; | |
856 | } | |
857 | ||
858 | logical = blk_to_logical(inode, start_blk); | |
859 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
860 | size = map_bh.b_size; | |
861 | flags = 0; | |
862 | if (buffer_unwritten(&map_bh)) | |
863 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
864 | ||
865 | start_blk += logical_to_blk(inode, size); | |
866 | ||
867 | /* | |
868 | * If we are past the EOF, then we need to make sure as | |
869 | * soon as we find a hole that the last extent we found | |
870 | * is marked with FIEMAP_EXTENT_LAST | |
871 | */ | |
872 | if (!past_eof && logical + size >= isize) | |
873 | past_eof = true; | |
874 | } | |
875 | cond_resched(); | |
876 | if (fatal_signal_pending(current)) | |
877 | ret = -EINTR; | |
878 | else | |
879 | goto next; | |
880 | out: | |
881 | if (ret == 1) | |
882 | ret = 0; | |
883 | ||
884 | mutex_unlock(&inode->i_mutex); | |
885 | return ret; | |
9ab70134 JK |
886 | } |
887 | ||
f1e88660 JK |
888 | /* |
889 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
890 | * Major change was from block_size == page_size in f2fs by default. | |
891 | */ | |
892 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
893 | struct list_head *pages, struct page *page, | |
894 | unsigned nr_pages) | |
895 | { | |
896 | struct bio *bio = NULL; | |
897 | unsigned page_idx; | |
898 | sector_t last_block_in_bio = 0; | |
899 | struct inode *inode = mapping->host; | |
900 | const unsigned blkbits = inode->i_blkbits; | |
901 | const unsigned blocksize = 1 << blkbits; | |
902 | sector_t block_in_file; | |
903 | sector_t last_block; | |
904 | sector_t last_block_in_file; | |
905 | sector_t block_nr; | |
906 | struct block_device *bdev = inode->i_sb->s_bdev; | |
907 | struct f2fs_map_blocks map; | |
908 | ||
909 | map.m_pblk = 0; | |
910 | map.m_lblk = 0; | |
911 | map.m_len = 0; | |
912 | map.m_flags = 0; | |
913 | ||
914 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
915 | ||
916 | prefetchw(&page->flags); | |
917 | if (pages) { | |
918 | page = list_entry(pages->prev, struct page, lru); | |
919 | list_del(&page->lru); | |
920 | if (add_to_page_cache_lru(page, mapping, | |
921 | page->index, GFP_KERNEL)) | |
922 | goto next_page; | |
923 | } | |
924 | ||
925 | block_in_file = (sector_t)page->index; | |
926 | last_block = block_in_file + nr_pages; | |
927 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
928 | blkbits; | |
929 | if (last_block > last_block_in_file) | |
930 | last_block = last_block_in_file; | |
931 | ||
932 | /* | |
933 | * Map blocks using the previous result first. | |
934 | */ | |
935 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
936 | block_in_file > map.m_lblk && | |
937 | block_in_file < (map.m_lblk + map.m_len)) | |
938 | goto got_it; | |
939 | ||
940 | /* | |
941 | * Then do more f2fs_map_blocks() calls until we are | |
942 | * done with this page. | |
943 | */ | |
944 | map.m_flags = 0; | |
945 | ||
946 | if (block_in_file < last_block) { | |
947 | map.m_lblk = block_in_file; | |
948 | map.m_len = last_block - block_in_file; | |
949 | ||
46c9e141 CY |
950 | if (f2fs_map_blocks(inode, &map, 0, |
951 | F2FS_GET_BLOCK_READ)) | |
f1e88660 JK |
952 | goto set_error_page; |
953 | } | |
954 | got_it: | |
955 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
956 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
957 | SetPageMappedToDisk(page); | |
958 | ||
959 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
960 | SetPageUptodate(page); | |
961 | goto confused; | |
962 | } | |
963 | } else { | |
964 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
965 | SetPageUptodate(page); | |
966 | unlock_page(page); | |
967 | goto next_page; | |
968 | } | |
969 | ||
970 | /* | |
971 | * This page will go to BIO. Do we need to send this | |
972 | * BIO off first? | |
973 | */ | |
974 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
975 | submit_and_realloc: | |
976 | submit_bio(READ, bio); | |
977 | bio = NULL; | |
978 | } | |
979 | if (bio == NULL) { | |
4375a336 JK |
980 | struct f2fs_crypto_ctx *ctx = NULL; |
981 | ||
982 | if (f2fs_encrypted_inode(inode) && | |
983 | S_ISREG(inode->i_mode)) { | |
4375a336 JK |
984 | |
985 | ctx = f2fs_get_crypto_ctx(inode); | |
986 | if (IS_ERR(ctx)) | |
987 | goto set_error_page; | |
988 | ||
989 | /* wait the page to be moved by cleaning */ | |
08b39fbd CY |
990 | f2fs_wait_on_encrypted_page_writeback( |
991 | F2FS_I_SB(inode), block_nr); | |
4375a336 JK |
992 | } |
993 | ||
f1e88660 | 994 | bio = bio_alloc(GFP_KERNEL, |
b54ffb73 | 995 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
4375a336 JK |
996 | if (!bio) { |
997 | if (ctx) | |
998 | f2fs_release_crypto_ctx(ctx); | |
f1e88660 | 999 | goto set_error_page; |
4375a336 | 1000 | } |
f1e88660 JK |
1001 | bio->bi_bdev = bdev; |
1002 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 1003 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 1004 | bio->bi_private = ctx; |
f1e88660 JK |
1005 | } |
1006 | ||
1007 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1008 | goto submit_and_realloc; | |
1009 | ||
1010 | last_block_in_bio = block_nr; | |
1011 | goto next_page; | |
1012 | set_error_page: | |
1013 | SetPageError(page); | |
1014 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
1015 | unlock_page(page); | |
1016 | goto next_page; | |
1017 | confused: | |
1018 | if (bio) { | |
1019 | submit_bio(READ, bio); | |
1020 | bio = NULL; | |
1021 | } | |
1022 | unlock_page(page); | |
1023 | next_page: | |
1024 | if (pages) | |
1025 | page_cache_release(page); | |
1026 | } | |
1027 | BUG_ON(pages && !list_empty(pages)); | |
1028 | if (bio) | |
1029 | submit_bio(READ, bio); | |
1030 | return 0; | |
1031 | } | |
1032 | ||
eb47b800 JK |
1033 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1034 | { | |
9ffe0fb5 | 1035 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1036 | int ret = -EAGAIN; |
9ffe0fb5 | 1037 | |
c20e89cd CY |
1038 | trace_f2fs_readpage(page, DATA); |
1039 | ||
e1c42045 | 1040 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1041 | if (f2fs_has_inline_data(inode)) |
1042 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1043 | if (ret == -EAGAIN) |
f1e88660 | 1044 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1045 | return ret; |
eb47b800 JK |
1046 | } |
1047 | ||
1048 | static int f2fs_read_data_pages(struct file *file, | |
1049 | struct address_space *mapping, | |
1050 | struct list_head *pages, unsigned nr_pages) | |
1051 | { | |
9ffe0fb5 | 1052 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1053 | struct page *page = list_entry(pages->prev, struct page, lru); |
1054 | ||
1055 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1056 | |
1057 | /* If the file has inline data, skip readpages */ | |
1058 | if (f2fs_has_inline_data(inode)) | |
1059 | return 0; | |
1060 | ||
f1e88660 | 1061 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1062 | } |
1063 | ||
05ca3632 | 1064 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1065 | { |
05ca3632 | 1066 | struct page *page = fio->page; |
eb47b800 | 1067 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1068 | struct dnode_of_data dn; |
1069 | int err = 0; | |
1070 | ||
1071 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1072 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1073 | if (err) |
1074 | return err; | |
1075 | ||
cf04e8eb | 1076 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
1077 | |
1078 | /* This page is already truncated */ | |
2bca1e23 JK |
1079 | if (fio->blk_addr == NULL_ADDR) { |
1080 | ClearPageUptodate(page); | |
eb47b800 | 1081 | goto out_writepage; |
2bca1e23 | 1082 | } |
eb47b800 | 1083 | |
4375a336 | 1084 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
08b39fbd CY |
1085 | |
1086 | /* wait for GCed encrypted page writeback */ | |
1087 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
1088 | fio->blk_addr); | |
1089 | ||
4375a336 JK |
1090 | fio->encrypted_page = f2fs_encrypt(inode, fio->page); |
1091 | if (IS_ERR(fio->encrypted_page)) { | |
1092 | err = PTR_ERR(fio->encrypted_page); | |
1093 | goto out_writepage; | |
1094 | } | |
1095 | } | |
1096 | ||
eb47b800 JK |
1097 | set_page_writeback(page); |
1098 | ||
1099 | /* | |
1100 | * If current allocation needs SSR, | |
1101 | * it had better in-place writes for updated data. | |
1102 | */ | |
cf04e8eb | 1103 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 | 1104 | !is_cold_data(page) && |
2da3e027 | 1105 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1106 | need_inplace_update(inode))) { |
05ca3632 | 1107 | rewrite_data_page(fio); |
fff04f90 | 1108 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1109 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1110 | } else { |
05ca3632 | 1111 | write_data_page(&dn, fio); |
216a620a | 1112 | set_data_blkaddr(&dn); |
7e4dde79 | 1113 | f2fs_update_extent_cache(&dn); |
8ce67cb0 | 1114 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1115 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1116 | if (page->index == 0) |
1117 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1118 | } |
1119 | out_writepage: | |
1120 | f2fs_put_dnode(&dn); | |
1121 | return err; | |
1122 | } | |
1123 | ||
1124 | static int f2fs_write_data_page(struct page *page, | |
1125 | struct writeback_control *wbc) | |
1126 | { | |
1127 | struct inode *inode = page->mapping->host; | |
4081363f | 1128 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1129 | loff_t i_size = i_size_read(inode); |
1130 | const pgoff_t end_index = ((unsigned long long) i_size) | |
1131 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 1132 | unsigned offset = 0; |
39936837 | 1133 | bool need_balance_fs = false; |
eb47b800 | 1134 | int err = 0; |
458e6197 | 1135 | struct f2fs_io_info fio = { |
05ca3632 | 1136 | .sbi = sbi, |
458e6197 | 1137 | .type = DATA, |
6c311ec6 | 1138 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1139 | .page = page, |
4375a336 | 1140 | .encrypted_page = NULL, |
458e6197 | 1141 | }; |
eb47b800 | 1142 | |
ecda0de3 CY |
1143 | trace_f2fs_writepage(page, DATA); |
1144 | ||
eb47b800 | 1145 | if (page->index < end_index) |
39936837 | 1146 | goto write; |
eb47b800 JK |
1147 | |
1148 | /* | |
1149 | * If the offset is out-of-range of file size, | |
1150 | * this page does not have to be written to disk. | |
1151 | */ | |
1152 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 1153 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1154 | goto out; |
eb47b800 JK |
1155 | |
1156 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 1157 | write: |
caf0047e | 1158 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1159 | goto redirty_out; |
1e84371f JK |
1160 | if (f2fs_is_drop_cache(inode)) |
1161 | goto out; | |
1162 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
1163 | available_free_memory(sbi, BASE_CHECK)) | |
1164 | goto redirty_out; | |
eb47b800 | 1165 | |
39936837 | 1166 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1167 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1168 | if (unlikely(f2fs_cp_error(sbi))) |
1169 | goto redirty_out; | |
05ca3632 | 1170 | err = do_write_data_page(&fio); |
8618b881 JK |
1171 | goto done; |
1172 | } | |
9ffe0fb5 | 1173 | |
cf779cab JK |
1174 | /* we should bypass data pages to proceed the kworkder jobs */ |
1175 | if (unlikely(f2fs_cp_error(sbi))) { | |
1176 | SetPageError(page); | |
a7ffdbe2 | 1177 | goto out; |
cf779cab JK |
1178 | } |
1179 | ||
8618b881 | 1180 | if (!wbc->for_reclaim) |
39936837 | 1181 | need_balance_fs = true; |
8618b881 | 1182 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1183 | goto redirty_out; |
eb47b800 | 1184 | |
b3d208f9 | 1185 | err = -EAGAIN; |
8618b881 | 1186 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1187 | if (f2fs_has_inline_data(inode)) |
1188 | err = f2fs_write_inline_data(inode, page); | |
1189 | if (err == -EAGAIN) | |
05ca3632 | 1190 | err = do_write_data_page(&fio); |
8618b881 JK |
1191 | f2fs_unlock_op(sbi); |
1192 | done: | |
1193 | if (err && err != -ENOENT) | |
1194 | goto redirty_out; | |
eb47b800 | 1195 | |
eb47b800 | 1196 | clear_cold_data(page); |
39936837 | 1197 | out: |
a7ffdbe2 | 1198 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1199 | if (err) |
1200 | ClearPageUptodate(page); | |
eb47b800 | 1201 | unlock_page(page); |
39936837 | 1202 | if (need_balance_fs) |
eb47b800 | 1203 | f2fs_balance_fs(sbi); |
eb7e813c | 1204 | if (wbc->for_reclaim) { |
2aea39ec | 1205 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
c227f912 | 1206 | remove_dirty_inode(inode); |
eb7e813c | 1207 | } |
eb47b800 JK |
1208 | return 0; |
1209 | ||
eb47b800 | 1210 | redirty_out: |
76f60268 | 1211 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1212 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1213 | } |
1214 | ||
fa9150a8 NJ |
1215 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1216 | void *data) | |
1217 | { | |
1218 | struct address_space *mapping = data; | |
1219 | int ret = mapping->a_ops->writepage(page, wbc); | |
1220 | mapping_set_error(mapping, ret); | |
1221 | return ret; | |
1222 | } | |
1223 | ||
8f46dcae CY |
1224 | /* |
1225 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1226 | * The major change is making write step of cold data page separately from | |
1227 | * warm/hot data page. | |
1228 | */ | |
1229 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1230 | struct writeback_control *wbc, writepage_t writepage, | |
1231 | void *data) | |
1232 | { | |
1233 | int ret = 0; | |
1234 | int done = 0; | |
1235 | struct pagevec pvec; | |
1236 | int nr_pages; | |
1237 | pgoff_t uninitialized_var(writeback_index); | |
1238 | pgoff_t index; | |
1239 | pgoff_t end; /* Inclusive */ | |
1240 | pgoff_t done_index; | |
1241 | int cycled; | |
1242 | int range_whole = 0; | |
1243 | int tag; | |
1244 | int step = 0; | |
1245 | ||
1246 | pagevec_init(&pvec, 0); | |
1247 | next: | |
1248 | if (wbc->range_cyclic) { | |
1249 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1250 | index = writeback_index; | |
1251 | if (index == 0) | |
1252 | cycled = 1; | |
1253 | else | |
1254 | cycled = 0; | |
1255 | end = -1; | |
1256 | } else { | |
1257 | index = wbc->range_start >> PAGE_CACHE_SHIFT; | |
1258 | end = wbc->range_end >> PAGE_CACHE_SHIFT; | |
1259 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) | |
1260 | range_whole = 1; | |
1261 | cycled = 1; /* ignore range_cyclic tests */ | |
1262 | } | |
1263 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1264 | tag = PAGECACHE_TAG_TOWRITE; | |
1265 | else | |
1266 | tag = PAGECACHE_TAG_DIRTY; | |
1267 | retry: | |
1268 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1269 | tag_pages_for_writeback(mapping, index, end); | |
1270 | done_index = index; | |
1271 | while (!done && (index <= end)) { | |
1272 | int i; | |
1273 | ||
1274 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1275 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1276 | if (nr_pages == 0) | |
1277 | break; | |
1278 | ||
1279 | for (i = 0; i < nr_pages; i++) { | |
1280 | struct page *page = pvec.pages[i]; | |
1281 | ||
1282 | if (page->index > end) { | |
1283 | done = 1; | |
1284 | break; | |
1285 | } | |
1286 | ||
1287 | done_index = page->index; | |
1288 | ||
1289 | lock_page(page); | |
1290 | ||
1291 | if (unlikely(page->mapping != mapping)) { | |
1292 | continue_unlock: | |
1293 | unlock_page(page); | |
1294 | continue; | |
1295 | } | |
1296 | ||
1297 | if (!PageDirty(page)) { | |
1298 | /* someone wrote it for us */ | |
1299 | goto continue_unlock; | |
1300 | } | |
1301 | ||
737f1899 | 1302 | if (step == is_cold_data(page)) |
8f46dcae CY |
1303 | goto continue_unlock; |
1304 | ||
1305 | if (PageWriteback(page)) { | |
1306 | if (wbc->sync_mode != WB_SYNC_NONE) | |
1307 | f2fs_wait_on_page_writeback(page, DATA); | |
1308 | else | |
1309 | goto continue_unlock; | |
1310 | } | |
1311 | ||
1312 | BUG_ON(PageWriteback(page)); | |
1313 | if (!clear_page_dirty_for_io(page)) | |
1314 | goto continue_unlock; | |
1315 | ||
1316 | ret = (*writepage)(page, wbc, data); | |
1317 | if (unlikely(ret)) { | |
1318 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1319 | unlock_page(page); | |
1320 | ret = 0; | |
1321 | } else { | |
1322 | done_index = page->index + 1; | |
1323 | done = 1; | |
1324 | break; | |
1325 | } | |
1326 | } | |
1327 | ||
1328 | if (--wbc->nr_to_write <= 0 && | |
1329 | wbc->sync_mode == WB_SYNC_NONE) { | |
1330 | done = 1; | |
1331 | break; | |
1332 | } | |
1333 | } | |
1334 | pagevec_release(&pvec); | |
1335 | cond_resched(); | |
1336 | } | |
1337 | ||
1338 | if (step < 1) { | |
1339 | step++; | |
1340 | goto next; | |
1341 | } | |
1342 | ||
1343 | if (!cycled && !done) { | |
1344 | cycled = 1; | |
1345 | index = 0; | |
1346 | end = writeback_index - 1; | |
1347 | goto retry; | |
1348 | } | |
1349 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1350 | mapping->writeback_index = done_index; | |
1351 | ||
1352 | return ret; | |
1353 | } | |
1354 | ||
25ca923b | 1355 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1356 | struct writeback_control *wbc) |
1357 | { | |
1358 | struct inode *inode = mapping->host; | |
4081363f | 1359 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1360 | bool locked = false; |
eb47b800 | 1361 | int ret; |
50c8cdb3 | 1362 | long diff; |
eb47b800 | 1363 | |
e5748434 CY |
1364 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1365 | ||
cfb185a1 | 1366 | /* deal with chardevs and other special file */ |
1367 | if (!mapping->a_ops->writepage) | |
1368 | return 0; | |
1369 | ||
6a290544 CY |
1370 | /* skip writing if there is no dirty page in this inode */ |
1371 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1372 | return 0; | |
1373 | ||
a1257023 JK |
1374 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1375 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1376 | available_free_memory(sbi, DIRTY_DENTS)) | |
1377 | goto skip_write; | |
1378 | ||
d323d005 CY |
1379 | /* skip writing during file defragment */ |
1380 | if (is_inode_flag_set(F2FS_I(inode), FI_DO_DEFRAG)) | |
1381 | goto skip_write; | |
1382 | ||
d5669f7b JK |
1383 | /* during POR, we don't need to trigger writepage at all. */ |
1384 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1385 | goto skip_write; | |
1386 | ||
50c8cdb3 | 1387 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1388 | |
5463e7c1 JK |
1389 | if (!S_ISDIR(inode->i_mode)) { |
1390 | mutex_lock(&sbi->writepages); | |
1391 | locked = true; | |
1392 | } | |
8f46dcae | 1393 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
bb96a8d5 | 1394 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
5463e7c1 JK |
1395 | if (locked) |
1396 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1397 | |
c227f912 | 1398 | remove_dirty_inode(inode); |
eb47b800 | 1399 | |
50c8cdb3 | 1400 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1401 | return ret; |
d3baf95d JK |
1402 | |
1403 | skip_write: | |
a7ffdbe2 | 1404 | wbc->pages_skipped += get_dirty_pages(inode); |
d3baf95d | 1405 | return 0; |
eb47b800 JK |
1406 | } |
1407 | ||
3aab8f82 CY |
1408 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1409 | { | |
1410 | struct inode *inode = mapping->host; | |
1411 | ||
1412 | if (to > inode->i_size) { | |
1413 | truncate_pagecache(inode, inode->i_size); | |
764aa3e9 | 1414 | truncate_blocks(inode, inode->i_size, true); |
3aab8f82 CY |
1415 | } |
1416 | } | |
1417 | ||
2aadac08 JK |
1418 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1419 | struct page *page, loff_t pos, unsigned len, | |
1420 | block_t *blk_addr, bool *node_changed) | |
1421 | { | |
1422 | struct inode *inode = page->mapping->host; | |
1423 | pgoff_t index = page->index; | |
1424 | struct dnode_of_data dn; | |
1425 | struct page *ipage; | |
b4d07a3e JK |
1426 | bool locked = false; |
1427 | struct extent_info ei; | |
2aadac08 JK |
1428 | int err = 0; |
1429 | ||
b4d07a3e JK |
1430 | if (f2fs_has_inline_data(inode) || |
1431 | (pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1432 | f2fs_lock_op(sbi); | |
1433 | locked = true; | |
1434 | } | |
1435 | restart: | |
2aadac08 JK |
1436 | /* check inline_data */ |
1437 | ipage = get_node_page(sbi, inode->i_ino); | |
1438 | if (IS_ERR(ipage)) { | |
1439 | err = PTR_ERR(ipage); | |
1440 | goto unlock_out; | |
1441 | } | |
1442 | ||
1443 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1444 | ||
1445 | if (f2fs_has_inline_data(inode)) { | |
1446 | if (pos + len <= MAX_INLINE_DATA) { | |
1447 | read_inline_data(page, ipage); | |
1448 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
1449 | sync_inode_page(&dn); | |
2aadac08 JK |
1450 | } else { |
1451 | err = f2fs_convert_inline_page(&dn, page); | |
1452 | if (err) | |
b4d07a3e JK |
1453 | goto out; |
1454 | if (dn.data_blkaddr == NULL_ADDR) | |
1455 | err = f2fs_get_block(&dn, index); | |
1456 | } | |
1457 | } else if (locked) { | |
1458 | err = f2fs_get_block(&dn, index); | |
1459 | } else { | |
1460 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1461 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1462 | } else { | |
1463 | bool restart = false; | |
1464 | ||
1465 | /* hole case */ | |
1466 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
1467 | if (err || (!err && dn.data_blkaddr == NULL_ADDR)) | |
1468 | restart = true; | |
1469 | if (restart) { | |
1470 | f2fs_put_dnode(&dn); | |
1471 | f2fs_lock_op(sbi); | |
1472 | locked = true; | |
1473 | goto restart; | |
1474 | } | |
2aadac08 JK |
1475 | } |
1476 | } | |
b4d07a3e | 1477 | |
2aadac08 JK |
1478 | /* convert_inline_page can make node_changed */ |
1479 | *blk_addr = dn.data_blkaddr; | |
1480 | *node_changed = dn.node_changed; | |
b4d07a3e | 1481 | out: |
2aadac08 JK |
1482 | f2fs_put_dnode(&dn); |
1483 | unlock_out: | |
b4d07a3e JK |
1484 | if (locked) |
1485 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1486 | return err; |
1487 | } | |
1488 | ||
eb47b800 JK |
1489 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1490 | loff_t pos, unsigned len, unsigned flags, | |
1491 | struct page **pagep, void **fsdata) | |
1492 | { | |
1493 | struct inode *inode = mapping->host; | |
4081363f | 1494 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1495 | struct page *page = NULL; |
eb47b800 | 1496 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
2aadac08 JK |
1497 | bool need_balance = false; |
1498 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1499 | int err = 0; |
1500 | ||
62aed044 CY |
1501 | trace_f2fs_write_begin(inode, pos, len, flags); |
1502 | ||
5f727395 JK |
1503 | /* |
1504 | * We should check this at this moment to avoid deadlock on inode page | |
1505 | * and #0 page. The locking rule for inline_data conversion should be: | |
1506 | * lock_page(page #0) -> lock_page(inode_page) | |
1507 | */ | |
1508 | if (index != 0) { | |
1509 | err = f2fs_convert_inline_inode(inode); | |
1510 | if (err) | |
1511 | goto fail; | |
1512 | } | |
afcb7ca0 | 1513 | repeat: |
eb47b800 | 1514 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1515 | if (!page) { |
1516 | err = -ENOMEM; | |
1517 | goto fail; | |
1518 | } | |
d5f66990 | 1519 | |
eb47b800 JK |
1520 | *pagep = page; |
1521 | ||
2aadac08 JK |
1522 | err = prepare_write_begin(sbi, page, pos, len, |
1523 | &blkaddr, &need_balance); | |
9ba69cf9 | 1524 | if (err) |
2aadac08 | 1525 | goto fail; |
9ba69cf9 | 1526 | |
2aadac08 | 1527 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 JK |
1528 | unlock_page(page); |
1529 | f2fs_balance_fs(sbi); | |
1530 | lock_page(page); | |
1531 | if (page->mapping != mapping) { | |
1532 | /* The page got truncated from under us */ | |
1533 | f2fs_put_page(page, 1); | |
1534 | goto repeat; | |
1535 | } | |
1536 | } | |
1537 | ||
b3d208f9 JK |
1538 | f2fs_wait_on_page_writeback(page, DATA); |
1539 | ||
08b39fbd CY |
1540 | /* wait for GCed encrypted page writeback */ |
1541 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1542 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1543 | |
90d4388a CY |
1544 | if (len == PAGE_CACHE_SIZE) |
1545 | goto out_update; | |
1546 | if (PageUptodate(page)) | |
1547 | goto out_clear; | |
eb47b800 JK |
1548 | |
1549 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
1550 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1551 | unsigned end = start + len; | |
1552 | ||
1553 | /* Reading beyond i_size is simple: memset to zero */ | |
1554 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
90d4388a | 1555 | goto out_update; |
eb47b800 JK |
1556 | } |
1557 | ||
2aadac08 | 1558 | if (blkaddr == NEW_ADDR) { |
eb47b800 JK |
1559 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1560 | } else { | |
cf04e8eb | 1561 | struct f2fs_io_info fio = { |
05ca3632 | 1562 | .sbi = sbi, |
cf04e8eb JK |
1563 | .type = DATA, |
1564 | .rw = READ_SYNC, | |
2aadac08 | 1565 | .blk_addr = blkaddr, |
05ca3632 | 1566 | .page = page, |
4375a336 | 1567 | .encrypted_page = NULL, |
cf04e8eb | 1568 | }; |
05ca3632 | 1569 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1570 | if (err) |
1571 | goto fail; | |
d54c795b | 1572 | |
393ff91f | 1573 | lock_page(page); |
6bacf52f | 1574 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1575 | err = -EIO; |
1576 | goto fail; | |
eb47b800 | 1577 | } |
6bacf52f | 1578 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1579 | f2fs_put_page(page, 1); |
1580 | goto repeat; | |
eb47b800 | 1581 | } |
4375a336 JK |
1582 | |
1583 | /* avoid symlink page */ | |
1584 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1585 | err = f2fs_decrypt_one(inode, page); | |
86531d6b | 1586 | if (err) |
4375a336 | 1587 | goto fail; |
4375a336 | 1588 | } |
eb47b800 | 1589 | } |
90d4388a | 1590 | out_update: |
eb47b800 | 1591 | SetPageUptodate(page); |
90d4388a | 1592 | out_clear: |
eb47b800 JK |
1593 | clear_cold_data(page); |
1594 | return 0; | |
9ba69cf9 | 1595 | |
3aab8f82 | 1596 | fail: |
86531d6b | 1597 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1598 | f2fs_write_failed(mapping, pos + len); |
1599 | return err; | |
eb47b800 JK |
1600 | } |
1601 | ||
a1dd3c13 JK |
1602 | static int f2fs_write_end(struct file *file, |
1603 | struct address_space *mapping, | |
1604 | loff_t pos, unsigned len, unsigned copied, | |
1605 | struct page *page, void *fsdata) | |
1606 | { | |
1607 | struct inode *inode = page->mapping->host; | |
1608 | ||
dfb2bf38 CY |
1609 | trace_f2fs_write_end(inode, pos, len, copied); |
1610 | ||
34ba94ba | 1611 | set_page_dirty(page); |
a1dd3c13 JK |
1612 | |
1613 | if (pos + copied > i_size_read(inode)) { | |
1614 | i_size_write(inode, pos + copied); | |
1615 | mark_inode_dirty(inode); | |
1616 | update_inode_page(inode); | |
1617 | } | |
1618 | ||
75c3c8bc | 1619 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
1620 | return copied; |
1621 | } | |
1622 | ||
6f673763 OS |
1623 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1624 | loff_t offset) | |
944fcfc1 JK |
1625 | { |
1626 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1627 | |
944fcfc1 JK |
1628 | if (offset & blocksize_mask) |
1629 | return -EINVAL; | |
1630 | ||
5b46f25d AV |
1631 | if (iov_iter_alignment(iter) & blocksize_mask) |
1632 | return -EINVAL; | |
1633 | ||
944fcfc1 JK |
1634 | return 0; |
1635 | } | |
1636 | ||
22c6186e OS |
1637 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1638 | loff_t offset) | |
eb47b800 JK |
1639 | { |
1640 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1641 | struct address_space *mapping = file->f_mapping; |
1642 | struct inode *inode = mapping->host; | |
1643 | size_t count = iov_iter_count(iter); | |
1644 | int err; | |
944fcfc1 | 1645 | |
b3d208f9 | 1646 | /* we don't need to use inline_data strictly */ |
b9d777b8 JK |
1647 | err = f2fs_convert_inline_inode(inode); |
1648 | if (err) | |
1649 | return err; | |
9ffe0fb5 | 1650 | |
fcc85a4d JK |
1651 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1652 | return 0; | |
1653 | ||
c15e8599 CY |
1654 | err = check_direct_IO(inode, iter, offset); |
1655 | if (err) | |
1656 | return err; | |
944fcfc1 | 1657 | |
6f673763 | 1658 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1659 | |
f9811703 | 1660 | if (iov_iter_rw(iter) == WRITE) { |
6d5a1495 CY |
1661 | err = __allocate_data_blocks(inode, offset, count); |
1662 | if (err) | |
f9811703 | 1663 | goto out; |
f9811703 | 1664 | } |
59b802e5 | 1665 | |
e2b4e2bc | 1666 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
f9811703 | 1667 | out: |
6f673763 | 1668 | if (err < 0 && iov_iter_rw(iter) == WRITE) |
3aab8f82 | 1669 | f2fs_write_failed(mapping, offset + count); |
70407fad | 1670 | |
6f673763 | 1671 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1672 | |
3aab8f82 | 1673 | return err; |
eb47b800 JK |
1674 | } |
1675 | ||
487261f3 CY |
1676 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1677 | unsigned int length) | |
eb47b800 JK |
1678 | { |
1679 | struct inode *inode = page->mapping->host; | |
487261f3 | 1680 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1681 | |
487261f3 CY |
1682 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
1683 | (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE)) | |
a7ffdbe2 JK |
1684 | return; |
1685 | ||
487261f3 CY |
1686 | if (PageDirty(page)) { |
1687 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1688 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1689 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1690 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1691 | else | |
1692 | inode_dec_dirty_pages(inode); | |
1693 | } | |
decd36b6 CY |
1694 | |
1695 | /* This is atomic written page, keep Private */ | |
1696 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1697 | return; | |
1698 | ||
eb47b800 JK |
1699 | ClearPagePrivate(page); |
1700 | } | |
1701 | ||
487261f3 | 1702 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1703 | { |
f68daeeb JK |
1704 | /* If this is dirty page, keep PagePrivate */ |
1705 | if (PageDirty(page)) | |
1706 | return 0; | |
1707 | ||
decd36b6 CY |
1708 | /* This is atomic written page, keep Private */ |
1709 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1710 | return 0; | |
1711 | ||
eb47b800 | 1712 | ClearPagePrivate(page); |
c3850aa1 | 1713 | return 1; |
eb47b800 JK |
1714 | } |
1715 | ||
1716 | static int f2fs_set_data_page_dirty(struct page *page) | |
1717 | { | |
1718 | struct address_space *mapping = page->mapping; | |
1719 | struct inode *inode = mapping->host; | |
1720 | ||
26c6b887 JK |
1721 | trace_f2fs_set_page_dirty(page, DATA); |
1722 | ||
eb47b800 | 1723 | SetPageUptodate(page); |
34ba94ba | 1724 | |
1e84371f | 1725 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1726 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1727 | register_inmem_page(inode, page); | |
1728 | return 1; | |
1729 | } | |
1730 | /* | |
1731 | * Previously, this page has been registered, we just | |
1732 | * return here. | |
1733 | */ | |
1734 | return 0; | |
34ba94ba JK |
1735 | } |
1736 | ||
eb47b800 JK |
1737 | if (!PageDirty(page)) { |
1738 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1739 | update_dirty_page(inode, page); |
eb47b800 JK |
1740 | return 1; |
1741 | } | |
1742 | return 0; | |
1743 | } | |
1744 | ||
c01e54b7 JK |
1745 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1746 | { | |
454ae7e5 CY |
1747 | struct inode *inode = mapping->host; |
1748 | ||
1d373a0e JK |
1749 | if (f2fs_has_inline_data(inode)) |
1750 | return 0; | |
1751 | ||
1752 | /* make sure allocating whole blocks */ | |
1753 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1754 | filemap_write_and_wait(mapping); | |
1755 | ||
e2b4e2bc | 1756 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1757 | } |
1758 | ||
eb47b800 JK |
1759 | const struct address_space_operations f2fs_dblock_aops = { |
1760 | .readpage = f2fs_read_data_page, | |
1761 | .readpages = f2fs_read_data_pages, | |
1762 | .writepage = f2fs_write_data_page, | |
1763 | .writepages = f2fs_write_data_pages, | |
1764 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1765 | .write_end = f2fs_write_end, |
eb47b800 | 1766 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1767 | .invalidatepage = f2fs_invalidate_page, |
1768 | .releasepage = f2fs_release_page, | |
eb47b800 | 1769 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1770 | .bmap = f2fs_bmap, |
eb47b800 | 1771 | }; |