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> |
fe76b796 JK |
22 | #include <linux/mm.h> |
23 | #include <linux/memcontrol.h> | |
f1e88660 | 24 | #include <linux/cleancache.h> |
eb47b800 JK |
25 | |
26 | #include "f2fs.h" | |
27 | #include "node.h" | |
28 | #include "segment.h" | |
db9f7c1a | 29 | #include "trace.h" |
848753aa | 30 | #include <trace/events/f2fs.h> |
eb47b800 | 31 | |
4246a0b6 | 32 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 33 | { |
f568849e LT |
34 | struct bio_vec *bvec; |
35 | int i; | |
93dfe2ac | 36 | |
8b038c70 | 37 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
1ecc0c5c | 38 | if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) |
8b038c70 CY |
39 | bio->bi_error = -EIO; |
40 | #endif | |
41 | ||
4375a336 | 42 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 43 | if (bio->bi_error) { |
0b81d077 | 44 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 45 | } else { |
0b81d077 | 46 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
47 | return; |
48 | } | |
49 | } | |
50 | ||
12377024 CY |
51 | bio_for_each_segment_all(bvec, bio, i) { |
52 | struct page *page = bvec->bv_page; | |
f1e88660 | 53 | |
4246a0b6 | 54 | if (!bio->bi_error) { |
237c0790 JK |
55 | if (!PageUptodate(page)) |
56 | SetPageUptodate(page); | |
f1e88660 JK |
57 | } else { |
58 | ClearPageUptodate(page); | |
59 | SetPageError(page); | |
60 | } | |
61 | unlock_page(page); | |
62 | } | |
f1e88660 JK |
63 | bio_put(bio); |
64 | } | |
65 | ||
4246a0b6 | 66 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 67 | { |
1b1f559f | 68 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
69 | struct bio_vec *bvec; |
70 | int i; | |
93dfe2ac | 71 | |
f568849e | 72 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
73 | struct page *page = bvec->bv_page; |
74 | ||
0b81d077 | 75 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 76 | |
4246a0b6 | 77 | if (unlikely(bio->bi_error)) { |
5114a97a | 78 | mapping_set_error(page->mapping, -EIO); |
38f91ca8 | 79 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac JK |
80 | } |
81 | end_page_writeback(page); | |
f568849e | 82 | } |
f5730184 JK |
83 | if (atomic_dec_and_test(&sbi->nr_wb_bios) && |
84 | wq_has_sleeper(&sbi->cp_wait)) | |
93dfe2ac JK |
85 | wake_up(&sbi->cp_wait); |
86 | ||
87 | bio_put(bio); | |
88 | } | |
89 | ||
940a6d34 GZ |
90 | /* |
91 | * Low-level block read/write IO operations. | |
92 | */ | |
93 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
94 | int npages, bool is_read) | |
95 | { | |
96 | struct bio *bio; | |
97 | ||
740432f8 | 98 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
99 | |
100 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 101 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 102 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 103 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
104 | |
105 | return bio; | |
106 | } | |
107 | ||
4fc29c1a LT |
108 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
109 | struct bio *bio, enum page_type type) | |
f5730184 | 110 | { |
4fc29c1a | 111 | if (!is_read_io(bio_op(bio))) { |
f5730184 | 112 | atomic_inc(&sbi->nr_wb_bios); |
52763a4b JK |
113 | if (f2fs_sb_mounted_hmsmr(sbi->sb) && |
114 | current->plug && (type == DATA || type == NODE)) | |
19a5f5e2 JK |
115 | blk_finish_plug(current->plug); |
116 | } | |
4e49ea4a | 117 | submit_bio(bio); |
f5730184 JK |
118 | } |
119 | ||
458e6197 | 120 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 121 | { |
458e6197 | 122 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
123 | |
124 | if (!io->bio) | |
125 | return; | |
126 | ||
04d328de | 127 | if (is_read_io(fio->op)) |
2ace38e0 | 128 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 129 | else |
2ace38e0 | 130 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 131 | |
04d328de MC |
132 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
133 | ||
4fc29c1a | 134 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
135 | io->bio = NULL; |
136 | } | |
137 | ||
0c3a5797 CY |
138 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
139 | struct page *page, nid_t ino) | |
0fd785eb | 140 | { |
0fd785eb CY |
141 | struct bio_vec *bvec; |
142 | struct page *target; | |
143 | int i; | |
144 | ||
0c3a5797 | 145 | if (!io->bio) |
0fd785eb | 146 | return false; |
0c3a5797 CY |
147 | |
148 | if (!inode && !page && !ino) | |
149 | return true; | |
0fd785eb CY |
150 | |
151 | bio_for_each_segment_all(bvec, io->bio, i) { | |
152 | ||
0b81d077 | 153 | if (bvec->bv_page->mapping) |
0fd785eb | 154 | target = bvec->bv_page; |
0b81d077 JK |
155 | else |
156 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 157 | |
0c3a5797 CY |
158 | if (inode && inode == target->mapping->host) |
159 | return true; | |
160 | if (page && page == target) | |
161 | return true; | |
162 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 163 | return true; |
0fd785eb CY |
164 | } |
165 | ||
0fd785eb CY |
166 | return false; |
167 | } | |
168 | ||
0c3a5797 CY |
169 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
170 | struct page *page, nid_t ino, | |
171 | enum page_type type) | |
172 | { | |
173 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
174 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
175 | bool ret; | |
176 | ||
177 | down_read(&io->io_rwsem); | |
178 | ret = __has_merged_page(io, inode, page, ino); | |
179 | up_read(&io->io_rwsem); | |
180 | return ret; | |
181 | } | |
182 | ||
183 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
184 | struct inode *inode, struct page *page, | |
185 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
186 | { |
187 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
188 | struct f2fs_bio_info *io; | |
189 | ||
190 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
191 | ||
df0f8dc0 | 192 | down_write(&io->io_rwsem); |
458e6197 | 193 | |
0c3a5797 CY |
194 | if (!__has_merged_page(io, inode, page, ino)) |
195 | goto out; | |
196 | ||
458e6197 JK |
197 | /* change META to META_FLUSH in the checkpoint procedure */ |
198 | if (type >= META_FLUSH) { | |
199 | io->fio.type = META_FLUSH; | |
04d328de | 200 | io->fio.op = REQ_OP_WRITE; |
0f7b2abd | 201 | if (test_opt(sbi, NOBARRIER)) |
04d328de | 202 | io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO; |
0f7b2abd | 203 | else |
04d328de MC |
204 | io->fio.op_flags = WRITE_FLUSH_FUA | REQ_META | |
205 | REQ_PRIO; | |
458e6197 JK |
206 | } |
207 | __submit_merged_bio(io); | |
0c3a5797 | 208 | out: |
df0f8dc0 | 209 | up_write(&io->io_rwsem); |
93dfe2ac JK |
210 | } |
211 | ||
0c3a5797 CY |
212 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
213 | int rw) | |
214 | { | |
215 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
216 | } | |
217 | ||
218 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
219 | struct inode *inode, struct page *page, | |
220 | nid_t ino, enum page_type type, int rw) | |
221 | { | |
222 | if (has_merged_page(sbi, inode, page, ino, type)) | |
223 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
224 | } | |
225 | ||
406657dd CY |
226 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
227 | { | |
228 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
229 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
230 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
231 | } | |
232 | ||
93dfe2ac JK |
233 | /* |
234 | * Fill the locked page with data located in the block address. | |
235 | * Return unlocked page. | |
236 | */ | |
05ca3632 | 237 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 238 | { |
93dfe2ac | 239 | struct bio *bio; |
0b81d077 JK |
240 | struct page *page = fio->encrypted_page ? |
241 | fio->encrypted_page : fio->page; | |
93dfe2ac | 242 | |
2ace38e0 | 243 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 244 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
245 | |
246 | /* Allocate a new bio */ | |
04d328de | 247 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 248 | |
09cbfeaf | 249 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 250 | bio_put(bio); |
93dfe2ac JK |
251 | return -EFAULT; |
252 | } | |
04d328de | 253 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 254 | |
4fc29c1a | 255 | __submit_bio(fio->sbi, bio, fio->type); |
93dfe2ac JK |
256 | return 0; |
257 | } | |
258 | ||
05ca3632 | 259 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 260 | { |
05ca3632 | 261 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 262 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 263 | struct f2fs_bio_info *io; |
04d328de | 264 | bool is_read = is_read_io(fio->op); |
4375a336 | 265 | struct page *bio_page; |
93dfe2ac | 266 | |
940a6d34 | 267 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 268 | |
7a9d7548 CY |
269 | if (fio->old_blkaddr != NEW_ADDR) |
270 | verify_block_addr(sbi, fio->old_blkaddr); | |
271 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 272 | |
df0f8dc0 | 273 | down_write(&io->io_rwsem); |
93dfe2ac | 274 | |
7a9d7548 | 275 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
04d328de | 276 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags))) |
458e6197 | 277 | __submit_merged_bio(io); |
93dfe2ac JK |
278 | alloc_new: |
279 | if (io->bio == NULL) { | |
7a9d7548 | 280 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
664ba972 | 281 | BIO_MAX_PAGES, is_read); |
458e6197 | 282 | io->fio = *fio; |
93dfe2ac JK |
283 | } |
284 | ||
4375a336 JK |
285 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
286 | ||
09cbfeaf KS |
287 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
288 | PAGE_SIZE) { | |
458e6197 | 289 | __submit_merged_bio(io); |
93dfe2ac JK |
290 | goto alloc_new; |
291 | } | |
292 | ||
7a9d7548 | 293 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 294 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 295 | |
df0f8dc0 | 296 | up_write(&io->io_rwsem); |
05ca3632 | 297 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
298 | } |
299 | ||
46008c6d CY |
300 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
301 | { | |
302 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
303 | __le32 *addr_array; | |
304 | ||
305 | /* Get physical address of data block */ | |
306 | addr_array = blkaddr_in_node(rn); | |
307 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
308 | } | |
309 | ||
0a8165d7 | 310 | /* |
eb47b800 JK |
311 | * Lock ordering for the change of data block address: |
312 | * ->data_page | |
313 | * ->node_page | |
314 | * update block addresses in the node page | |
315 | */ | |
216a620a | 316 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 317 | { |
46008c6d CY |
318 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
319 | __set_data_blkaddr(dn); | |
320 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 321 | dn->node_changed = true; |
eb47b800 JK |
322 | } |
323 | ||
f28b3434 CY |
324 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
325 | { | |
326 | dn->data_blkaddr = blkaddr; | |
327 | set_data_blkaddr(dn); | |
328 | f2fs_update_extent_cache(dn); | |
329 | } | |
330 | ||
46008c6d CY |
331 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
332 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 333 | { |
4081363f | 334 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 335 | |
46008c6d CY |
336 | if (!count) |
337 | return 0; | |
338 | ||
91942321 | 339 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 340 | return -EPERM; |
46008c6d | 341 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
342 | return -ENOSPC; |
343 | ||
46008c6d CY |
344 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
345 | dn->ofs_in_node, count); | |
346 | ||
347 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
348 | ||
349 | for (; count > 0; dn->ofs_in_node++) { | |
350 | block_t blkaddr = | |
351 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
352 | if (blkaddr == NULL_ADDR) { | |
353 | dn->data_blkaddr = NEW_ADDR; | |
354 | __set_data_blkaddr(dn); | |
355 | count--; | |
356 | } | |
357 | } | |
358 | ||
359 | if (set_page_dirty(dn->node_page)) | |
360 | dn->node_changed = true; | |
eb47b800 JK |
361 | return 0; |
362 | } | |
363 | ||
46008c6d CY |
364 | /* Should keep dn->ofs_in_node unchanged */ |
365 | int reserve_new_block(struct dnode_of_data *dn) | |
366 | { | |
367 | unsigned int ofs_in_node = dn->ofs_in_node; | |
368 | int ret; | |
369 | ||
370 | ret = reserve_new_blocks(dn, 1); | |
371 | dn->ofs_in_node = ofs_in_node; | |
372 | return ret; | |
373 | } | |
374 | ||
b600965c HL |
375 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
376 | { | |
377 | bool need_put = dn->inode_page ? false : true; | |
378 | int err; | |
379 | ||
380 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
381 | if (err) | |
382 | return err; | |
a8865372 | 383 | |
b600965c HL |
384 | if (dn->data_blkaddr == NULL_ADDR) |
385 | err = reserve_new_block(dn); | |
a8865372 | 386 | if (err || need_put) |
b600965c HL |
387 | f2fs_put_dnode(dn); |
388 | return err; | |
389 | } | |
390 | ||
759af1c9 | 391 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 392 | { |
028a41e8 | 393 | struct extent_info ei; |
759af1c9 | 394 | struct inode *inode = dn->inode; |
028a41e8 | 395 | |
759af1c9 FL |
396 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
397 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
398 | return 0; | |
429511cd | 399 | } |
028a41e8 | 400 | |
759af1c9 | 401 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
402 | } |
403 | ||
a56c7c6f | 404 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 405 | int op_flags, bool for_write) |
eb47b800 | 406 | { |
eb47b800 JK |
407 | struct address_space *mapping = inode->i_mapping; |
408 | struct dnode_of_data dn; | |
409 | struct page *page; | |
cb3bc9ee | 410 | struct extent_info ei; |
eb47b800 | 411 | int err; |
cf04e8eb | 412 | struct f2fs_io_info fio = { |
05ca3632 | 413 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 414 | .type = DATA, |
04d328de MC |
415 | .op = REQ_OP_READ, |
416 | .op_flags = op_flags, | |
4375a336 | 417 | .encrypted_page = NULL, |
cf04e8eb | 418 | }; |
eb47b800 | 419 | |
4375a336 JK |
420 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
421 | return read_mapping_page(mapping, index, NULL); | |
422 | ||
a56c7c6f | 423 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
424 | if (!page) |
425 | return ERR_PTR(-ENOMEM); | |
426 | ||
cb3bc9ee CY |
427 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
428 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
429 | goto got_it; | |
430 | } | |
431 | ||
eb47b800 | 432 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 433 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
434 | if (err) |
435 | goto put_err; | |
eb47b800 JK |
436 | f2fs_put_dnode(&dn); |
437 | ||
6bacf52f | 438 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
439 | err = -ENOENT; |
440 | goto put_err; | |
650495de | 441 | } |
cb3bc9ee | 442 | got_it: |
43f3eae1 JK |
443 | if (PageUptodate(page)) { |
444 | unlock_page(page); | |
eb47b800 | 445 | return page; |
43f3eae1 | 446 | } |
eb47b800 | 447 | |
d59ff4df JK |
448 | /* |
449 | * A new dentry page is allocated but not able to be written, since its | |
450 | * new inode page couldn't be allocated due to -ENOSPC. | |
451 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
452 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
453 | */ | |
454 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 455 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
456 | if (!PageUptodate(page)) |
457 | SetPageUptodate(page); | |
43f3eae1 | 458 | unlock_page(page); |
d59ff4df JK |
459 | return page; |
460 | } | |
eb47b800 | 461 | |
7a9d7548 | 462 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
463 | fio.page = page; |
464 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 465 | if (err) |
86531d6b | 466 | goto put_err; |
43f3eae1 | 467 | return page; |
86531d6b JK |
468 | |
469 | put_err: | |
470 | f2fs_put_page(page, 1); | |
471 | return ERR_PTR(err); | |
43f3eae1 JK |
472 | } |
473 | ||
474 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
475 | { | |
476 | struct address_space *mapping = inode->i_mapping; | |
477 | struct page *page; | |
478 | ||
479 | page = find_get_page(mapping, index); | |
480 | if (page && PageUptodate(page)) | |
481 | return page; | |
482 | f2fs_put_page(page, 0); | |
483 | ||
a56c7c6f | 484 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
485 | if (IS_ERR(page)) |
486 | return page; | |
487 | ||
488 | if (PageUptodate(page)) | |
489 | return page; | |
490 | ||
491 | wait_on_page_locked(page); | |
492 | if (unlikely(!PageUptodate(page))) { | |
493 | f2fs_put_page(page, 0); | |
494 | return ERR_PTR(-EIO); | |
495 | } | |
496 | return page; | |
497 | } | |
498 | ||
499 | /* | |
500 | * If it tries to access a hole, return an error. | |
501 | * Because, the callers, functions in dir.c and GC, should be able to know | |
502 | * whether this page exists or not. | |
503 | */ | |
a56c7c6f JK |
504 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
505 | bool for_write) | |
43f3eae1 JK |
506 | { |
507 | struct address_space *mapping = inode->i_mapping; | |
508 | struct page *page; | |
509 | repeat: | |
a56c7c6f | 510 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
511 | if (IS_ERR(page)) |
512 | return page; | |
393ff91f | 513 | |
43f3eae1 | 514 | /* wait for read completion */ |
393ff91f | 515 | lock_page(page); |
6bacf52f | 516 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
517 | f2fs_put_page(page, 1); |
518 | goto repeat; | |
eb47b800 | 519 | } |
1563ac75 CY |
520 | if (unlikely(!PageUptodate(page))) { |
521 | f2fs_put_page(page, 1); | |
522 | return ERR_PTR(-EIO); | |
523 | } | |
eb47b800 JK |
524 | return page; |
525 | } | |
526 | ||
0a8165d7 | 527 | /* |
eb47b800 JK |
528 | * Caller ensures that this data page is never allocated. |
529 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 530 | * |
4f4124d0 CY |
531 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
532 | * f2fs_unlock_op(). | |
470f00e9 CY |
533 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
534 | * ipage should be released by this function. | |
eb47b800 | 535 | */ |
64aa7ed9 | 536 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 537 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 538 | { |
eb47b800 JK |
539 | struct address_space *mapping = inode->i_mapping; |
540 | struct page *page; | |
541 | struct dnode_of_data dn; | |
542 | int err; | |
7612118a | 543 | |
a56c7c6f | 544 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
545 | if (!page) { |
546 | /* | |
547 | * before exiting, we should make sure ipage will be released | |
548 | * if any error occur. | |
549 | */ | |
550 | f2fs_put_page(ipage, 1); | |
01f28610 | 551 | return ERR_PTR(-ENOMEM); |
470f00e9 | 552 | } |
eb47b800 | 553 | |
a8865372 | 554 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 555 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
556 | if (err) { |
557 | f2fs_put_page(page, 1); | |
eb47b800 | 558 | return ERR_PTR(err); |
a8865372 | 559 | } |
01f28610 JK |
560 | if (!ipage) |
561 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
562 | |
563 | if (PageUptodate(page)) | |
01f28610 | 564 | goto got_it; |
eb47b800 JK |
565 | |
566 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 567 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
568 | if (!PageUptodate(page)) |
569 | SetPageUptodate(page); | |
eb47b800 | 570 | } else { |
4375a336 | 571 | f2fs_put_page(page, 1); |
a8865372 | 572 | |
7612118a JK |
573 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
574 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
575 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 576 | if (IS_ERR(page)) |
7612118a | 577 | return page; |
eb47b800 | 578 | } |
01f28610 | 579 | got_it: |
9edcdabf | 580 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 581 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 582 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
583 | return page; |
584 | } | |
585 | ||
bfad7c2d JK |
586 | static int __allocate_data_block(struct dnode_of_data *dn) |
587 | { | |
4081363f | 588 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 589 | struct f2fs_summary sum; |
bfad7c2d | 590 | struct node_info ni; |
38aa0889 | 591 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 592 | pgoff_t fofs; |
46008c6d | 593 | blkcnt_t count = 1; |
bfad7c2d | 594 | |
91942321 | 595 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 596 | return -EPERM; |
df6136ef CY |
597 | |
598 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
599 | if (dn->data_blkaddr == NEW_ADDR) | |
600 | goto alloc; | |
601 | ||
46008c6d | 602 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
603 | return -ENOSPC; |
604 | ||
df6136ef | 605 | alloc: |
bfad7c2d JK |
606 | get_node_info(sbi, dn->nid, &ni); |
607 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
608 | ||
38aa0889 JK |
609 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
610 | seg = CURSEG_DIRECT_IO; | |
611 | ||
df6136ef CY |
612 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
613 | &sum, seg); | |
216a620a | 614 | set_data_blkaddr(dn); |
bfad7c2d | 615 | |
976e4c50 | 616 | /* update i_size */ |
81ca7350 | 617 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 618 | dn->ofs_in_node; |
09cbfeaf | 619 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 620 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 621 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
622 | return 0; |
623 | } | |
624 | ||
b439b103 | 625 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 626 | { |
b439b103 | 627 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 628 | struct f2fs_map_blocks map; |
b439b103 | 629 | ssize_t ret = 0; |
59b802e5 | 630 | |
0080c507 | 631 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
632 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
633 | if (map.m_len > map.m_lblk) | |
634 | map.m_len -= map.m_lblk; | |
635 | else | |
636 | map.m_len = 0; | |
637 | ||
da85985c | 638 | map.m_next_pgofs = NULL; |
2a340760 | 639 | |
24b84912 JK |
640 | if (iocb->ki_flags & IOCB_DIRECT) { |
641 | ret = f2fs_convert_inline_inode(inode); | |
642 | if (ret) | |
643 | return ret; | |
644 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); | |
645 | } | |
646 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
b439b103 JK |
647 | ret = f2fs_convert_inline_inode(inode); |
648 | if (ret) | |
649 | return ret; | |
b439b103 | 650 | } |
24b84912 JK |
651 | if (!f2fs_has_inline_data(inode)) |
652 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
b439b103 | 653 | return ret; |
59b802e5 JK |
654 | } |
655 | ||
0a8165d7 | 656 | /* |
003a3e1d JK |
657 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
658 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
659 | * If original data blocks are allocated, then give them to blockdev. |
660 | * Otherwise, | |
661 | * a. preallocate requested block addresses | |
662 | * b. do not use extent cache for better performance | |
663 | * c. give the block addresses to blockdev | |
eb47b800 | 664 | */ |
d323d005 | 665 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 666 | int create, int flag) |
eb47b800 | 667 | { |
003a3e1d | 668 | unsigned int maxblocks = map->m_len; |
eb47b800 | 669 | struct dnode_of_data dn; |
f9811703 | 670 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 671 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 672 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 673 | int err = 0, ofs = 1; |
46008c6d CY |
674 | unsigned int ofs_in_node, last_ofs_in_node; |
675 | blkcnt_t prealloc; | |
a2e7d1bf | 676 | struct extent_info ei; |
7df3a431 | 677 | block_t blkaddr; |
eb47b800 | 678 | |
dfd02e4d CY |
679 | if (!maxblocks) |
680 | return 0; | |
681 | ||
003a3e1d JK |
682 | map->m_len = 0; |
683 | map->m_flags = 0; | |
684 | ||
685 | /* it only supports block size == page size */ | |
686 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 687 | end = pgofs + maxblocks; |
eb47b800 | 688 | |
24b84912 | 689 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
690 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
691 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
692 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 693 | goto out; |
a2e7d1bf | 694 | } |
bfad7c2d | 695 | |
4fe71e88 | 696 | next_dnode: |
59b802e5 | 697 | if (create) |
3104af35 | 698 | f2fs_lock_op(sbi); |
eb47b800 JK |
699 | |
700 | /* When reading holes, we need its node page */ | |
701 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 702 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 703 | if (err) { |
43473f96 CY |
704 | if (flag == F2FS_GET_BLOCK_BMAP) |
705 | map->m_pblk = 0; | |
da85985c | 706 | if (err == -ENOENT) { |
bfad7c2d | 707 | err = 0; |
da85985c CY |
708 | if (map->m_next_pgofs) |
709 | *map->m_next_pgofs = | |
710 | get_next_page_offset(&dn, pgofs); | |
711 | } | |
bfad7c2d | 712 | goto unlock_out; |
848753aa | 713 | } |
973163fc | 714 | |
46008c6d | 715 | prealloc = 0; |
230436b3 | 716 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 717 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
718 | |
719 | next_block: | |
720 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
721 | ||
722 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 723 | if (create) { |
f9811703 CY |
724 | if (unlikely(f2fs_cp_error(sbi))) { |
725 | err = -EIO; | |
4fe71e88 | 726 | goto sync_out; |
f9811703 | 727 | } |
24b84912 | 728 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
729 | if (blkaddr == NULL_ADDR) { |
730 | prealloc++; | |
731 | last_ofs_in_node = dn.ofs_in_node; | |
732 | } | |
24b84912 JK |
733 | } else { |
734 | err = __allocate_data_block(&dn); | |
6f2d8ed6 | 735 | if (!err) |
91942321 | 736 | set_inode_flag(inode, FI_APPEND_WRITE); |
24b84912 | 737 | } |
973163fc | 738 | if (err) |
4fe71e88 | 739 | goto sync_out; |
973163fc | 740 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 741 | blkaddr = dn.data_blkaddr; |
973163fc | 742 | } else { |
43473f96 CY |
743 | if (flag == F2FS_GET_BLOCK_BMAP) { |
744 | map->m_pblk = 0; | |
745 | goto sync_out; | |
746 | } | |
da85985c CY |
747 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
748 | blkaddr == NULL_ADDR) { | |
749 | if (map->m_next_pgofs) | |
750 | *map->m_next_pgofs = pgofs + 1; | |
751 | } | |
973163fc | 752 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 753 | blkaddr != NEW_ADDR) |
4fe71e88 | 754 | goto sync_out; |
e2b4e2bc | 755 | } |
e2b4e2bc | 756 | } |
eb47b800 | 757 | |
46008c6d CY |
758 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
759 | goto skip; | |
760 | ||
4fe71e88 CY |
761 | if (map->m_len == 0) { |
762 | /* preallocated unwritten block should be mapped for fiemap. */ | |
763 | if (blkaddr == NEW_ADDR) | |
764 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
765 | map->m_flags |= F2FS_MAP_MAPPED; | |
766 | ||
767 | map->m_pblk = blkaddr; | |
768 | map->m_len = 1; | |
769 | } else if ((map->m_pblk != NEW_ADDR && | |
770 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 771 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 772 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
773 | ofs++; |
774 | map->m_len++; | |
775 | } else { | |
776 | goto sync_out; | |
777 | } | |
bfad7c2d | 778 | |
46008c6d | 779 | skip: |
bfad7c2d JK |
780 | dn.ofs_in_node++; |
781 | pgofs++; | |
782 | ||
46008c6d CY |
783 | /* preallocate blocks in batch for one dnode page */ |
784 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
785 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 786 | |
46008c6d CY |
787 | dn.ofs_in_node = ofs_in_node; |
788 | err = reserve_new_blocks(&dn, prealloc); | |
789 | if (err) | |
790 | goto sync_out; | |
bfad7c2d | 791 | |
46008c6d CY |
792 | map->m_len += dn.ofs_in_node - ofs_in_node; |
793 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
794 | err = -ENOSPC; | |
795 | goto sync_out; | |
3104af35 | 796 | } |
46008c6d CY |
797 | dn.ofs_in_node = end_offset; |
798 | } | |
799 | ||
800 | if (pgofs >= end) | |
801 | goto sync_out; | |
802 | else if (dn.ofs_in_node < end_offset) | |
803 | goto next_block; | |
804 | ||
46008c6d CY |
805 | f2fs_put_dnode(&dn); |
806 | ||
807 | if (create) { | |
808 | f2fs_unlock_op(sbi); | |
6f2d8ed6 | 809 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 810 | } |
46008c6d | 811 | goto next_dnode; |
7df3a431 | 812 | |
bfad7c2d | 813 | sync_out: |
eb47b800 | 814 | f2fs_put_dnode(&dn); |
bfad7c2d | 815 | unlock_out: |
2a340760 | 816 | if (create) { |
3104af35 | 817 | f2fs_unlock_op(sbi); |
6f2d8ed6 | 818 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 819 | } |
bfad7c2d | 820 | out: |
003a3e1d | 821 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 822 | return err; |
eb47b800 JK |
823 | } |
824 | ||
003a3e1d | 825 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
826 | struct buffer_head *bh, int create, int flag, |
827 | pgoff_t *next_pgofs) | |
003a3e1d JK |
828 | { |
829 | struct f2fs_map_blocks map; | |
830 | int ret; | |
831 | ||
832 | map.m_lblk = iblock; | |
833 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 834 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 835 | |
e2b4e2bc | 836 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
837 | if (!ret) { |
838 | map_bh(bh, inode->i_sb, map.m_pblk); | |
839 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
840 | bh->b_size = map.m_len << inode->i_blkbits; | |
841 | } | |
842 | return ret; | |
843 | } | |
844 | ||
ccfb3000 | 845 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
846 | struct buffer_head *bh_result, int create, int flag, |
847 | pgoff_t *next_pgofs) | |
e2b4e2bc | 848 | { |
da85985c CY |
849 | return __get_data_block(inode, iblock, bh_result, create, |
850 | flag, next_pgofs); | |
e2b4e2bc CY |
851 | } |
852 | ||
853 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
854 | struct buffer_head *bh_result, int create) |
855 | { | |
e2b4e2bc | 856 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 857 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
858 | } |
859 | ||
e2b4e2bc | 860 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
861 | struct buffer_head *bh_result, int create) |
862 | { | |
179448bf | 863 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 864 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
865 | return -EFBIG; |
866 | ||
e2b4e2bc | 867 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 868 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
869 | } |
870 | ||
7f63eb77 JK |
871 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
872 | { | |
873 | return (offset >> inode->i_blkbits); | |
874 | } | |
875 | ||
876 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
877 | { | |
878 | return (blk << inode->i_blkbits); | |
879 | } | |
880 | ||
9ab70134 JK |
881 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
882 | u64 start, u64 len) | |
883 | { | |
7f63eb77 JK |
884 | struct buffer_head map_bh; |
885 | sector_t start_blk, last_blk; | |
da85985c | 886 | pgoff_t next_pgofs; |
7f63eb77 JK |
887 | u64 logical = 0, phys = 0, size = 0; |
888 | u32 flags = 0; | |
7f63eb77 JK |
889 | int ret = 0; |
890 | ||
891 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
892 | if (ret) | |
893 | return ret; | |
894 | ||
67f8cf3c JK |
895 | if (f2fs_has_inline_data(inode)) { |
896 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
897 | if (ret != -EAGAIN) | |
898 | return ret; | |
899 | } | |
900 | ||
5955102c | 901 | inode_lock(inode); |
de1475cc | 902 | |
7f63eb77 JK |
903 | if (logical_to_blk(inode, len) == 0) |
904 | len = blk_to_logical(inode, 1); | |
905 | ||
906 | start_blk = logical_to_blk(inode, start); | |
907 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 908 | |
7f63eb77 JK |
909 | next: |
910 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
911 | map_bh.b_size = len; | |
912 | ||
e2b4e2bc | 913 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 914 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
915 | if (ret) |
916 | goto out; | |
917 | ||
918 | /* HOLE */ | |
919 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 920 | start_blk = next_pgofs; |
58736fa6 CY |
921 | |
922 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
923 | F2FS_I_SB(inode)->max_file_blocks)) | |
9a950d52 | 924 | goto prep_next; |
58736fa6 | 925 | |
9a950d52 FL |
926 | flags |= FIEMAP_EXTENT_LAST; |
927 | } | |
7f63eb77 | 928 | |
da5af127 CY |
929 | if (size) { |
930 | if (f2fs_encrypted_inode(inode)) | |
931 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
932 | ||
9a950d52 FL |
933 | ret = fiemap_fill_next_extent(fieinfo, logical, |
934 | phys, size, flags); | |
da5af127 | 935 | } |
7f63eb77 | 936 | |
9a950d52 FL |
937 | if (start_blk > last_blk || ret) |
938 | goto out; | |
7f63eb77 | 939 | |
9a950d52 FL |
940 | logical = blk_to_logical(inode, start_blk); |
941 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
942 | size = map_bh.b_size; | |
943 | flags = 0; | |
944 | if (buffer_unwritten(&map_bh)) | |
945 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 946 | |
9a950d52 | 947 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 948 | |
9a950d52 | 949 | prep_next: |
7f63eb77 JK |
950 | cond_resched(); |
951 | if (fatal_signal_pending(current)) | |
952 | ret = -EINTR; | |
953 | else | |
954 | goto next; | |
955 | out: | |
956 | if (ret == 1) | |
957 | ret = 0; | |
958 | ||
5955102c | 959 | inode_unlock(inode); |
7f63eb77 | 960 | return ret; |
9ab70134 JK |
961 | } |
962 | ||
6a7a3aed WY |
963 | static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
964 | unsigned nr_pages) | |
78682f79 CY |
965 | { |
966 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
967 | struct fscrypt_ctx *ctx = NULL; | |
968 | struct block_device *bdev = sbi->sb->s_bdev; | |
969 | struct bio *bio; | |
970 | ||
971 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
972 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
973 | if (IS_ERR(ctx)) | |
974 | return ERR_CAST(ctx); | |
975 | ||
976 | /* wait the page to be moved by cleaning */ | |
977 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
978 | } | |
979 | ||
980 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
981 | if (!bio) { | |
982 | if (ctx) | |
983 | fscrypt_release_ctx(ctx); | |
984 | return ERR_PTR(-ENOMEM); | |
985 | } | |
986 | bio->bi_bdev = bdev; | |
987 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blkaddr); | |
988 | bio->bi_end_io = f2fs_read_end_io; | |
989 | bio->bi_private = ctx; | |
990 | ||
991 | return bio; | |
992 | } | |
993 | ||
f1e88660 JK |
994 | /* |
995 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
996 | * Major change was from block_size == page_size in f2fs by default. | |
997 | */ | |
998 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
999 | struct list_head *pages, struct page *page, | |
1000 | unsigned nr_pages) | |
1001 | { | |
1002 | struct bio *bio = NULL; | |
1003 | unsigned page_idx; | |
1004 | sector_t last_block_in_bio = 0; | |
1005 | struct inode *inode = mapping->host; | |
1006 | const unsigned blkbits = inode->i_blkbits; | |
1007 | const unsigned blocksize = 1 << blkbits; | |
1008 | sector_t block_in_file; | |
1009 | sector_t last_block; | |
1010 | sector_t last_block_in_file; | |
1011 | sector_t block_nr; | |
f1e88660 JK |
1012 | struct f2fs_map_blocks map; |
1013 | ||
1014 | map.m_pblk = 0; | |
1015 | map.m_lblk = 0; | |
1016 | map.m_len = 0; | |
1017 | map.m_flags = 0; | |
da85985c | 1018 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1019 | |
1020 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1021 | ||
1022 | prefetchw(&page->flags); | |
1023 | if (pages) { | |
1024 | page = list_entry(pages->prev, struct page, lru); | |
1025 | list_del(&page->lru); | |
1026 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1027 | page->index, |
1028 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1029 | goto next_page; |
1030 | } | |
1031 | ||
1032 | block_in_file = (sector_t)page->index; | |
1033 | last_block = block_in_file + nr_pages; | |
1034 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1035 | blkbits; | |
1036 | if (last_block > last_block_in_file) | |
1037 | last_block = last_block_in_file; | |
1038 | ||
1039 | /* | |
1040 | * Map blocks using the previous result first. | |
1041 | */ | |
1042 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1043 | block_in_file > map.m_lblk && | |
1044 | block_in_file < (map.m_lblk + map.m_len)) | |
1045 | goto got_it; | |
1046 | ||
1047 | /* | |
1048 | * Then do more f2fs_map_blocks() calls until we are | |
1049 | * done with this page. | |
1050 | */ | |
1051 | map.m_flags = 0; | |
1052 | ||
1053 | if (block_in_file < last_block) { | |
1054 | map.m_lblk = block_in_file; | |
1055 | map.m_len = last_block - block_in_file; | |
1056 | ||
46c9e141 | 1057 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1058 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1059 | goto set_error_page; |
1060 | } | |
1061 | got_it: | |
1062 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1063 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1064 | SetPageMappedToDisk(page); | |
1065 | ||
1066 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1067 | SetPageUptodate(page); | |
1068 | goto confused; | |
1069 | } | |
1070 | } else { | |
09cbfeaf | 1071 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
1072 | if (!PageUptodate(page)) |
1073 | SetPageUptodate(page); | |
f1e88660 JK |
1074 | unlock_page(page); |
1075 | goto next_page; | |
1076 | } | |
1077 | ||
1078 | /* | |
1079 | * This page will go to BIO. Do we need to send this | |
1080 | * BIO off first? | |
1081 | */ | |
1082 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
1083 | submit_and_realloc: | |
4fc29c1a | 1084 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1085 | bio = NULL; |
1086 | } | |
1087 | if (bio == NULL) { | |
78682f79 | 1088 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1d353eb7 JK |
1089 | if (IS_ERR(bio)) { |
1090 | bio = NULL; | |
f1e88660 | 1091 | goto set_error_page; |
4375a336 | 1092 | } |
04d328de | 1093 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1094 | } |
1095 | ||
1096 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1097 | goto submit_and_realloc; | |
1098 | ||
1099 | last_block_in_bio = block_nr; | |
1100 | goto next_page; | |
1101 | set_error_page: | |
1102 | SetPageError(page); | |
09cbfeaf | 1103 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1104 | unlock_page(page); |
1105 | goto next_page; | |
1106 | confused: | |
1107 | if (bio) { | |
4fc29c1a | 1108 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1109 | bio = NULL; |
1110 | } | |
1111 | unlock_page(page); | |
1112 | next_page: | |
1113 | if (pages) | |
09cbfeaf | 1114 | put_page(page); |
f1e88660 JK |
1115 | } |
1116 | BUG_ON(pages && !list_empty(pages)); | |
1117 | if (bio) | |
4fc29c1a | 1118 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1119 | return 0; |
1120 | } | |
1121 | ||
eb47b800 JK |
1122 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1123 | { | |
9ffe0fb5 | 1124 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1125 | int ret = -EAGAIN; |
9ffe0fb5 | 1126 | |
c20e89cd CY |
1127 | trace_f2fs_readpage(page, DATA); |
1128 | ||
e1c42045 | 1129 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1130 | if (f2fs_has_inline_data(inode)) |
1131 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1132 | if (ret == -EAGAIN) |
f1e88660 | 1133 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1134 | return ret; |
eb47b800 JK |
1135 | } |
1136 | ||
1137 | static int f2fs_read_data_pages(struct file *file, | |
1138 | struct address_space *mapping, | |
1139 | struct list_head *pages, unsigned nr_pages) | |
1140 | { | |
9ffe0fb5 | 1141 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1142 | struct page *page = list_entry(pages->prev, struct page, lru); |
1143 | ||
1144 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1145 | |
1146 | /* If the file has inline data, skip readpages */ | |
1147 | if (f2fs_has_inline_data(inode)) | |
1148 | return 0; | |
1149 | ||
f1e88660 | 1150 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1151 | } |
1152 | ||
05ca3632 | 1153 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1154 | { |
05ca3632 | 1155 | struct page *page = fio->page; |
eb47b800 | 1156 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1157 | struct dnode_of_data dn; |
1158 | int err = 0; | |
1159 | ||
1160 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1161 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1162 | if (err) |
1163 | return err; | |
1164 | ||
28bc106b | 1165 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1166 | |
1167 | /* This page is already truncated */ | |
7a9d7548 | 1168 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1169 | ClearPageUptodate(page); |
eb47b800 | 1170 | goto out_writepage; |
2bca1e23 | 1171 | } |
eb47b800 | 1172 | |
4375a336 | 1173 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1174 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1175 | |
1176 | /* wait for GCed encrypted page writeback */ | |
1177 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1178 | fio->old_blkaddr); |
b32e4482 JK |
1179 | retry_encrypt: |
1180 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1181 | gfp_flags); | |
4375a336 JK |
1182 | if (IS_ERR(fio->encrypted_page)) { |
1183 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1184 | if (err == -ENOMEM) { |
1185 | /* flush pending ios and wait for a while */ | |
1186 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1187 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1188 | gfp_flags |= __GFP_NOFAIL; | |
1189 | err = 0; | |
1190 | goto retry_encrypt; | |
1191 | } | |
4375a336 JK |
1192 | goto out_writepage; |
1193 | } | |
1194 | } | |
1195 | ||
eb47b800 JK |
1196 | set_page_writeback(page); |
1197 | ||
1198 | /* | |
1199 | * If current allocation needs SSR, | |
1200 | * it had better in-place writes for updated data. | |
1201 | */ | |
7a9d7548 | 1202 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1203 | !is_cold_data(page) && |
2da3e027 | 1204 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1205 | need_inplace_update(inode))) { |
05ca3632 | 1206 | rewrite_data_page(fio); |
91942321 | 1207 | set_inode_flag(inode, FI_UPDATE_WRITE); |
8ce67cb0 | 1208 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1209 | } else { |
05ca3632 | 1210 | write_data_page(&dn, fio); |
8ce67cb0 | 1211 | trace_f2fs_do_write_data_page(page, OPU); |
91942321 | 1212 | set_inode_flag(inode, FI_APPEND_WRITE); |
3c6c2beb | 1213 | if (page->index == 0) |
91942321 | 1214 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
eb47b800 JK |
1215 | } |
1216 | out_writepage: | |
1217 | f2fs_put_dnode(&dn); | |
1218 | return err; | |
1219 | } | |
1220 | ||
1221 | static int f2fs_write_data_page(struct page *page, | |
1222 | struct writeback_control *wbc) | |
1223 | { | |
1224 | struct inode *inode = page->mapping->host; | |
4081363f | 1225 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1226 | loff_t i_size = i_size_read(inode); |
1227 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1228 | >> PAGE_SHIFT; |
26de9b11 | 1229 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1230 | unsigned offset = 0; |
39936837 | 1231 | bool need_balance_fs = false; |
eb47b800 | 1232 | int err = 0; |
458e6197 | 1233 | struct f2fs_io_info fio = { |
05ca3632 | 1234 | .sbi = sbi, |
458e6197 | 1235 | .type = DATA, |
04d328de MC |
1236 | .op = REQ_OP_WRITE, |
1237 | .op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0, | |
05ca3632 | 1238 | .page = page, |
4375a336 | 1239 | .encrypted_page = NULL, |
458e6197 | 1240 | }; |
eb47b800 | 1241 | |
ecda0de3 CY |
1242 | trace_f2fs_writepage(page, DATA); |
1243 | ||
eb47b800 | 1244 | if (page->index < end_index) |
39936837 | 1245 | goto write; |
eb47b800 JK |
1246 | |
1247 | /* | |
1248 | * If the offset is out-of-range of file size, | |
1249 | * this page does not have to be written to disk. | |
1250 | */ | |
09cbfeaf | 1251 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1252 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1253 | goto out; |
eb47b800 | 1254 | |
09cbfeaf | 1255 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1256 | write: |
caf0047e | 1257 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1258 | goto redirty_out; |
1e84371f JK |
1259 | if (f2fs_is_drop_cache(inode)) |
1260 | goto out; | |
e6e5f561 JK |
1261 | /* we should not write 0'th page having journal header */ |
1262 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1263 | (!wbc->for_reclaim && | |
1264 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1265 | goto redirty_out; |
eb47b800 | 1266 | |
cf779cab JK |
1267 | /* we should bypass data pages to proceed the kworkder jobs */ |
1268 | if (unlikely(f2fs_cp_error(sbi))) { | |
7f319975 | 1269 | mapping_set_error(page->mapping, -EIO); |
a7ffdbe2 | 1270 | goto out; |
cf779cab JK |
1271 | } |
1272 | ||
39936837 | 1273 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1274 | if (S_ISDIR(inode->i_mode)) { |
05ca3632 | 1275 | err = do_write_data_page(&fio); |
8618b881 JK |
1276 | goto done; |
1277 | } | |
9ffe0fb5 | 1278 | |
8618b881 | 1279 | if (!wbc->for_reclaim) |
39936837 | 1280 | need_balance_fs = true; |
7f3037a5 | 1281 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1282 | goto redirty_out; |
eb47b800 | 1283 | |
b3d208f9 | 1284 | err = -EAGAIN; |
8618b881 | 1285 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1286 | if (f2fs_has_inline_data(inode)) |
1287 | err = f2fs_write_inline_data(inode, page); | |
1288 | if (err == -EAGAIN) | |
05ca3632 | 1289 | err = do_write_data_page(&fio); |
26de9b11 JK |
1290 | if (F2FS_I(inode)->last_disk_size < psize) |
1291 | F2FS_I(inode)->last_disk_size = psize; | |
8618b881 JK |
1292 | f2fs_unlock_op(sbi); |
1293 | done: | |
1294 | if (err && err != -ENOENT) | |
1295 | goto redirty_out; | |
eb47b800 | 1296 | |
eb47b800 | 1297 | clear_cold_data(page); |
39936837 | 1298 | out: |
a7ffdbe2 | 1299 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1300 | if (err) |
1301 | ClearPageUptodate(page); | |
0c3a5797 CY |
1302 | |
1303 | if (wbc->for_reclaim) { | |
1304 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1305 | remove_dirty_inode(inode); | |
1306 | } | |
1307 | ||
eb47b800 | 1308 | unlock_page(page); |
2c4db1a6 | 1309 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1310 | |
1311 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1312 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1313 | |
eb47b800 JK |
1314 | return 0; |
1315 | ||
eb47b800 | 1316 | redirty_out: |
76f60268 | 1317 | redirty_page_for_writepage(wbc, page); |
b230e6ca JK |
1318 | unlock_page(page); |
1319 | return err; | |
fa9150a8 NJ |
1320 | } |
1321 | ||
8f46dcae CY |
1322 | /* |
1323 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1324 | * The major change is making write step of cold data page separately from | |
1325 | * warm/hot data page. | |
1326 | */ | |
1327 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b230e6ca | 1328 | struct writeback_control *wbc) |
8f46dcae CY |
1329 | { |
1330 | int ret = 0; | |
1331 | int done = 0; | |
1332 | struct pagevec pvec; | |
1333 | int nr_pages; | |
1334 | pgoff_t uninitialized_var(writeback_index); | |
1335 | pgoff_t index; | |
1336 | pgoff_t end; /* Inclusive */ | |
1337 | pgoff_t done_index; | |
1338 | int cycled; | |
1339 | int range_whole = 0; | |
1340 | int tag; | |
6ca56ca4 | 1341 | int nwritten = 0; |
8f46dcae CY |
1342 | |
1343 | pagevec_init(&pvec, 0); | |
46ae957f | 1344 | |
8f46dcae CY |
1345 | if (wbc->range_cyclic) { |
1346 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1347 | index = writeback_index; | |
1348 | if (index == 0) | |
1349 | cycled = 1; | |
1350 | else | |
1351 | cycled = 0; | |
1352 | end = -1; | |
1353 | } else { | |
09cbfeaf KS |
1354 | index = wbc->range_start >> PAGE_SHIFT; |
1355 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1356 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1357 | range_whole = 1; | |
1358 | cycled = 1; /* ignore range_cyclic tests */ | |
1359 | } | |
1360 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1361 | tag = PAGECACHE_TAG_TOWRITE; | |
1362 | else | |
1363 | tag = PAGECACHE_TAG_DIRTY; | |
1364 | retry: | |
1365 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1366 | tag_pages_for_writeback(mapping, index, end); | |
1367 | done_index = index; | |
1368 | while (!done && (index <= end)) { | |
1369 | int i; | |
1370 | ||
1371 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1372 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1373 | if (nr_pages == 0) | |
1374 | break; | |
1375 | ||
1376 | for (i = 0; i < nr_pages; i++) { | |
1377 | struct page *page = pvec.pages[i]; | |
1378 | ||
1379 | if (page->index > end) { | |
1380 | done = 1; | |
1381 | break; | |
1382 | } | |
1383 | ||
1384 | done_index = page->index; | |
1385 | ||
1386 | lock_page(page); | |
1387 | ||
1388 | if (unlikely(page->mapping != mapping)) { | |
1389 | continue_unlock: | |
1390 | unlock_page(page); | |
1391 | continue; | |
1392 | } | |
1393 | ||
1394 | if (!PageDirty(page)) { | |
1395 | /* someone wrote it for us */ | |
1396 | goto continue_unlock; | |
1397 | } | |
1398 | ||
8f46dcae CY |
1399 | if (PageWriteback(page)) { |
1400 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1401 | f2fs_wait_on_page_writeback(page, |
1402 | DATA, true); | |
8f46dcae CY |
1403 | else |
1404 | goto continue_unlock; | |
1405 | } | |
1406 | ||
1407 | BUG_ON(PageWriteback(page)); | |
1408 | if (!clear_page_dirty_for_io(page)) | |
1409 | goto continue_unlock; | |
1410 | ||
b230e6ca | 1411 | ret = mapping->a_ops->writepage(page, wbc); |
8f46dcae | 1412 | if (unlikely(ret)) { |
b230e6ca JK |
1413 | done_index = page->index + 1; |
1414 | done = 1; | |
1415 | break; | |
6ca56ca4 CY |
1416 | } else { |
1417 | nwritten++; | |
8f46dcae CY |
1418 | } |
1419 | ||
1420 | if (--wbc->nr_to_write <= 0 && | |
1421 | wbc->sync_mode == WB_SYNC_NONE) { | |
1422 | done = 1; | |
1423 | break; | |
1424 | } | |
1425 | } | |
1426 | pagevec_release(&pvec); | |
1427 | cond_resched(); | |
1428 | } | |
1429 | ||
8f46dcae CY |
1430 | if (!cycled && !done) { |
1431 | cycled = 1; | |
1432 | index = 0; | |
1433 | end = writeback_index - 1; | |
1434 | goto retry; | |
1435 | } | |
1436 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1437 | mapping->writeback_index = done_index; | |
1438 | ||
6ca56ca4 CY |
1439 | if (nwritten) |
1440 | f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping), mapping->host, | |
1441 | NULL, 0, DATA, WRITE); | |
1442 | ||
8f46dcae CY |
1443 | return ret; |
1444 | } | |
1445 | ||
25ca923b | 1446 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1447 | struct writeback_control *wbc) |
1448 | { | |
1449 | struct inode *inode = mapping->host; | |
4081363f | 1450 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 1451 | struct blk_plug plug; |
eb47b800 | 1452 | int ret; |
eb47b800 | 1453 | |
cfb185a1 | 1454 | /* deal with chardevs and other special file */ |
1455 | if (!mapping->a_ops->writepage) | |
1456 | return 0; | |
1457 | ||
6a290544 CY |
1458 | /* skip writing if there is no dirty page in this inode */ |
1459 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1460 | return 0; | |
1461 | ||
a1257023 JK |
1462 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1463 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1464 | available_free_memory(sbi, DIRTY_DENTS)) | |
1465 | goto skip_write; | |
1466 | ||
d323d005 | 1467 | /* skip writing during file defragment */ |
91942321 | 1468 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
1469 | goto skip_write; |
1470 | ||
d5669f7b JK |
1471 | /* during POR, we don't need to trigger writepage at all. */ |
1472 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1473 | goto skip_write; | |
1474 | ||
d31c7c3f YH |
1475 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1476 | ||
9dfa1baf | 1477 | blk_start_plug(&plug); |
b230e6ca | 1478 | ret = f2fs_write_cache_pages(mapping, wbc); |
9dfa1baf | 1479 | blk_finish_plug(&plug); |
28ea6162 JK |
1480 | /* |
1481 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1482 | * to detect pending bios. | |
1483 | */ | |
458e6197 | 1484 | |
c227f912 | 1485 | remove_dirty_inode(inode); |
eb47b800 | 1486 | return ret; |
d3baf95d JK |
1487 | |
1488 | skip_write: | |
a7ffdbe2 | 1489 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1490 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1491 | return 0; |
eb47b800 JK |
1492 | } |
1493 | ||
3aab8f82 CY |
1494 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1495 | { | |
1496 | struct inode *inode = mapping->host; | |
819d9153 | 1497 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1498 | |
819d9153 JK |
1499 | if (to > i_size) { |
1500 | truncate_pagecache(inode, i_size); | |
1501 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1502 | } |
1503 | } | |
1504 | ||
2aadac08 JK |
1505 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1506 | struct page *page, loff_t pos, unsigned len, | |
1507 | block_t *blk_addr, bool *node_changed) | |
1508 | { | |
1509 | struct inode *inode = page->mapping->host; | |
1510 | pgoff_t index = page->index; | |
1511 | struct dnode_of_data dn; | |
1512 | struct page *ipage; | |
b4d07a3e JK |
1513 | bool locked = false; |
1514 | struct extent_info ei; | |
2aadac08 JK |
1515 | int err = 0; |
1516 | ||
24b84912 JK |
1517 | /* |
1518 | * we already allocated all the blocks, so we don't need to get | |
1519 | * the block addresses when there is no need to fill the page. | |
1520 | */ | |
5d4c0af4 | 1521 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE) |
24b84912 JK |
1522 | return 0; |
1523 | ||
b4d07a3e | 1524 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1525 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1526 | f2fs_lock_op(sbi); |
1527 | locked = true; | |
1528 | } | |
1529 | restart: | |
2aadac08 JK |
1530 | /* check inline_data */ |
1531 | ipage = get_node_page(sbi, inode->i_ino); | |
1532 | if (IS_ERR(ipage)) { | |
1533 | err = PTR_ERR(ipage); | |
1534 | goto unlock_out; | |
1535 | } | |
1536 | ||
1537 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1538 | ||
1539 | if (f2fs_has_inline_data(inode)) { | |
1540 | if (pos + len <= MAX_INLINE_DATA) { | |
1541 | read_inline_data(page, ipage); | |
91942321 | 1542 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
1543 | if (inode->i_nlink) |
1544 | set_inline_node(ipage); | |
2aadac08 JK |
1545 | } else { |
1546 | err = f2fs_convert_inline_page(&dn, page); | |
1547 | if (err) | |
b4d07a3e JK |
1548 | goto out; |
1549 | if (dn.data_blkaddr == NULL_ADDR) | |
1550 | err = f2fs_get_block(&dn, index); | |
1551 | } | |
1552 | } else if (locked) { | |
1553 | err = f2fs_get_block(&dn, index); | |
1554 | } else { | |
1555 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1556 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1557 | } else { | |
b4d07a3e JK |
1558 | /* hole case */ |
1559 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1560 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1561 | f2fs_put_dnode(&dn); |
1562 | f2fs_lock_op(sbi); | |
1563 | locked = true; | |
1564 | goto restart; | |
1565 | } | |
2aadac08 JK |
1566 | } |
1567 | } | |
b4d07a3e | 1568 | |
2aadac08 JK |
1569 | /* convert_inline_page can make node_changed */ |
1570 | *blk_addr = dn.data_blkaddr; | |
1571 | *node_changed = dn.node_changed; | |
b4d07a3e | 1572 | out: |
2aadac08 JK |
1573 | f2fs_put_dnode(&dn); |
1574 | unlock_out: | |
b4d07a3e JK |
1575 | if (locked) |
1576 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1577 | return err; |
1578 | } | |
1579 | ||
eb47b800 JK |
1580 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1581 | loff_t pos, unsigned len, unsigned flags, | |
1582 | struct page **pagep, void **fsdata) | |
1583 | { | |
1584 | struct inode *inode = mapping->host; | |
4081363f | 1585 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1586 | struct page *page = NULL; |
09cbfeaf | 1587 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1588 | bool need_balance = false; |
1589 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1590 | int err = 0; |
1591 | ||
62aed044 CY |
1592 | trace_f2fs_write_begin(inode, pos, len, flags); |
1593 | ||
5f727395 JK |
1594 | /* |
1595 | * We should check this at this moment to avoid deadlock on inode page | |
1596 | * and #0 page. The locking rule for inline_data conversion should be: | |
1597 | * lock_page(page #0) -> lock_page(inode_page) | |
1598 | */ | |
1599 | if (index != 0) { | |
1600 | err = f2fs_convert_inline_inode(inode); | |
1601 | if (err) | |
1602 | goto fail; | |
1603 | } | |
afcb7ca0 | 1604 | repeat: |
eb47b800 | 1605 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1606 | if (!page) { |
1607 | err = -ENOMEM; | |
1608 | goto fail; | |
1609 | } | |
d5f66990 | 1610 | |
eb47b800 JK |
1611 | *pagep = page; |
1612 | ||
2aadac08 JK |
1613 | err = prepare_write_begin(sbi, page, pos, len, |
1614 | &blkaddr, &need_balance); | |
9ba69cf9 | 1615 | if (err) |
2aadac08 | 1616 | goto fail; |
9ba69cf9 | 1617 | |
7f3037a5 | 1618 | if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) { |
2a340760 | 1619 | unlock_page(page); |
2c4db1a6 | 1620 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1621 | lock_page(page); |
1622 | if (page->mapping != mapping) { | |
1623 | /* The page got truncated from under us */ | |
1624 | f2fs_put_page(page, 1); | |
1625 | goto repeat; | |
1626 | } | |
1627 | } | |
1628 | ||
fec1d657 | 1629 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1630 | |
08b39fbd CY |
1631 | /* wait for GCed encrypted page writeback */ |
1632 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1633 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1634 | |
649d7df2 JK |
1635 | if (len == PAGE_SIZE || PageUptodate(page)) |
1636 | return 0; | |
eb47b800 | 1637 | |
2aadac08 | 1638 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1639 | zero_user_segment(page, 0, PAGE_SIZE); |
649d7df2 | 1640 | SetPageUptodate(page); |
eb47b800 | 1641 | } else { |
78682f79 | 1642 | struct bio *bio; |
d54c795b | 1643 | |
78682f79 CY |
1644 | bio = f2fs_grab_bio(inode, blkaddr, 1); |
1645 | if (IS_ERR(bio)) { | |
1646 | err = PTR_ERR(bio); | |
3aab8f82 | 1647 | goto fail; |
eb47b800 | 1648 | } |
4fc29c1a | 1649 | bio_set_op_attrs(bio, REQ_OP_READ, READ_SYNC); |
78682f79 CY |
1650 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
1651 | bio_put(bio); | |
1652 | err = -EFAULT; | |
1653 | goto fail; | |
1654 | } | |
1655 | ||
4fc29c1a | 1656 | __submit_bio(sbi, bio, DATA); |
d54c795b | 1657 | |
393ff91f | 1658 | lock_page(page); |
6bacf52f | 1659 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1660 | f2fs_put_page(page, 1); |
1661 | goto repeat; | |
eb47b800 | 1662 | } |
1563ac75 CY |
1663 | if (unlikely(!PageUptodate(page))) { |
1664 | err = -EIO; | |
1665 | goto fail; | |
4375a336 | 1666 | } |
eb47b800 | 1667 | } |
eb47b800 | 1668 | return 0; |
9ba69cf9 | 1669 | |
3aab8f82 | 1670 | fail: |
86531d6b | 1671 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1672 | f2fs_write_failed(mapping, pos + len); |
1673 | return err; | |
eb47b800 JK |
1674 | } |
1675 | ||
a1dd3c13 JK |
1676 | static int f2fs_write_end(struct file *file, |
1677 | struct address_space *mapping, | |
1678 | loff_t pos, unsigned len, unsigned copied, | |
1679 | struct page *page, void *fsdata) | |
1680 | { | |
1681 | struct inode *inode = page->mapping->host; | |
1682 | ||
dfb2bf38 CY |
1683 | trace_f2fs_write_end(inode, pos, len, copied); |
1684 | ||
649d7df2 JK |
1685 | /* |
1686 | * This should be come from len == PAGE_SIZE, and we expect copied | |
1687 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
1688 | * let generic_perform_write() try to copy data again through copied=0. | |
1689 | */ | |
1690 | if (!PageUptodate(page)) { | |
1691 | if (unlikely(copied != PAGE_SIZE)) | |
1692 | copied = 0; | |
1693 | else | |
1694 | SetPageUptodate(page); | |
1695 | } | |
1696 | if (!copied) | |
1697 | goto unlock_out; | |
1698 | ||
34ba94ba | 1699 | set_page_dirty(page); |
649d7df2 | 1700 | clear_cold_data(page); |
a1dd3c13 | 1701 | |
fc9581c8 JK |
1702 | if (pos + copied > i_size_read(inode)) |
1703 | f2fs_i_size_write(inode, pos + copied); | |
649d7df2 | 1704 | unlock_out: |
3024c9a1 | 1705 | f2fs_put_page(page, 1); |
d0239e1b | 1706 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1707 | return copied; |
1708 | } | |
1709 | ||
6f673763 OS |
1710 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1711 | loff_t offset) | |
944fcfc1 JK |
1712 | { |
1713 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1714 | |
944fcfc1 JK |
1715 | if (offset & blocksize_mask) |
1716 | return -EINVAL; | |
1717 | ||
5b46f25d AV |
1718 | if (iov_iter_alignment(iter) & blocksize_mask) |
1719 | return -EINVAL; | |
1720 | ||
944fcfc1 JK |
1721 | return 0; |
1722 | } | |
1723 | ||
c8b8e32d | 1724 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 1725 | { |
b439b103 | 1726 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1727 | struct inode *inode = mapping->host; |
1728 | size_t count = iov_iter_count(iter); | |
c8b8e32d | 1729 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 1730 | int rw = iov_iter_rw(iter); |
3aab8f82 | 1731 | int err; |
944fcfc1 | 1732 | |
b439b103 | 1733 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1734 | if (err) |
1735 | return err; | |
9ffe0fb5 | 1736 | |
fcc85a4d JK |
1737 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1738 | return 0; | |
36abef4e JK |
1739 | if (test_opt(F2FS_I_SB(inode), LFS)) |
1740 | return 0; | |
fcc85a4d | 1741 | |
5302fb00 | 1742 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 1743 | |
82e0a5aa | 1744 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
c8b8e32d | 1745 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
82e0a5aa CY |
1746 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
1747 | ||
1748 | if (rw == WRITE) { | |
6bfc4919 | 1749 | if (err > 0) |
91942321 | 1750 | set_inode_flag(inode, FI_UPDATE_WRITE); |
6bfc4919 JK |
1751 | else if (err < 0) |
1752 | f2fs_write_failed(mapping, offset + count); | |
1753 | } | |
70407fad | 1754 | |
5302fb00 | 1755 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 1756 | |
3aab8f82 | 1757 | return err; |
eb47b800 JK |
1758 | } |
1759 | ||
487261f3 CY |
1760 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1761 | unsigned int length) | |
eb47b800 JK |
1762 | { |
1763 | struct inode *inode = page->mapping->host; | |
487261f3 | 1764 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1765 | |
487261f3 | 1766 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1767 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1768 | return; |
1769 | ||
487261f3 | 1770 | if (PageDirty(page)) { |
933439c8 | 1771 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 1772 | dec_page_count(sbi, F2FS_DIRTY_META); |
933439c8 | 1773 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 1774 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
933439c8 | 1775 | } else { |
487261f3 | 1776 | inode_dec_dirty_pages(inode); |
933439c8 CY |
1777 | remove_dirty_inode(inode); |
1778 | } | |
487261f3 | 1779 | } |
decd36b6 CY |
1780 | |
1781 | /* This is atomic written page, keep Private */ | |
1782 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1783 | return; | |
1784 | ||
23dc974e | 1785 | set_page_private(page, 0); |
eb47b800 JK |
1786 | ClearPagePrivate(page); |
1787 | } | |
1788 | ||
487261f3 | 1789 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1790 | { |
f68daeeb JK |
1791 | /* If this is dirty page, keep PagePrivate */ |
1792 | if (PageDirty(page)) | |
1793 | return 0; | |
1794 | ||
decd36b6 CY |
1795 | /* This is atomic written page, keep Private */ |
1796 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1797 | return 0; | |
1798 | ||
23dc974e | 1799 | set_page_private(page, 0); |
eb47b800 | 1800 | ClearPagePrivate(page); |
c3850aa1 | 1801 | return 1; |
eb47b800 JK |
1802 | } |
1803 | ||
fe76b796 JK |
1804 | /* |
1805 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
1806 | * in very high speed storages. (e.g., pmem) | |
1807 | */ | |
1808 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
1809 | { | |
1810 | struct address_space *mapping = page->mapping; | |
1811 | unsigned long flags; | |
1812 | ||
1813 | if (unlikely(!mapping)) | |
1814 | return; | |
1815 | ||
1816 | spin_lock(&mapping->private_lock); | |
1817 | lock_page_memcg(page); | |
1818 | SetPageDirty(page); | |
1819 | spin_unlock(&mapping->private_lock); | |
1820 | ||
1821 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
1822 | WARN_ON_ONCE(!PageUptodate(page)); | |
1823 | account_page_dirtied(page, mapping); | |
1824 | radix_tree_tag_set(&mapping->page_tree, | |
1825 | page_index(page), PAGECACHE_TAG_DIRTY); | |
1826 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
1827 | unlock_page_memcg(page); | |
1828 | ||
1829 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
1830 | return; | |
1831 | } | |
1832 | ||
eb47b800 JK |
1833 | static int f2fs_set_data_page_dirty(struct page *page) |
1834 | { | |
1835 | struct address_space *mapping = page->mapping; | |
1836 | struct inode *inode = mapping->host; | |
1837 | ||
26c6b887 JK |
1838 | trace_f2fs_set_page_dirty(page, DATA); |
1839 | ||
237c0790 JK |
1840 | if (!PageUptodate(page)) |
1841 | SetPageUptodate(page); | |
34ba94ba | 1842 | |
1e84371f | 1843 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1844 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1845 | register_inmem_page(inode, page); | |
1846 | return 1; | |
1847 | } | |
1848 | /* | |
1849 | * Previously, this page has been registered, we just | |
1850 | * return here. | |
1851 | */ | |
1852 | return 0; | |
34ba94ba JK |
1853 | } |
1854 | ||
eb47b800 | 1855 | if (!PageDirty(page)) { |
fe76b796 | 1856 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 1857 | update_dirty_page(inode, page); |
eb47b800 JK |
1858 | return 1; |
1859 | } | |
1860 | return 0; | |
1861 | } | |
1862 | ||
c01e54b7 JK |
1863 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1864 | { | |
454ae7e5 CY |
1865 | struct inode *inode = mapping->host; |
1866 | ||
1d373a0e JK |
1867 | if (f2fs_has_inline_data(inode)) |
1868 | return 0; | |
1869 | ||
1870 | /* make sure allocating whole blocks */ | |
1871 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1872 | filemap_write_and_wait(mapping); | |
1873 | ||
e2b4e2bc | 1874 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1875 | } |
1876 | ||
5b7a487c WG |
1877 | #ifdef CONFIG_MIGRATION |
1878 | #include <linux/migrate.h> | |
1879 | ||
1880 | int f2fs_migrate_page(struct address_space *mapping, | |
1881 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
1882 | { | |
1883 | int rc, extra_count; | |
1884 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
1885 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
1886 | ||
1887 | BUG_ON(PageWriteback(page)); | |
1888 | ||
1889 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
1890 | if (atomic_written && !mutex_trylock(&fi->inmem_lock)) | |
1891 | return -EAGAIN; | |
1892 | ||
1893 | /* | |
1894 | * A reference is expected if PagePrivate set when move mapping, | |
1895 | * however F2FS breaks this for maintaining dirty page counts when | |
1896 | * truncating pages. So here adjusting the 'extra_count' make it work. | |
1897 | */ | |
1898 | extra_count = (atomic_written ? 1 : 0) - page_has_private(page); | |
1899 | rc = migrate_page_move_mapping(mapping, newpage, | |
1900 | page, NULL, mode, extra_count); | |
1901 | if (rc != MIGRATEPAGE_SUCCESS) { | |
1902 | if (atomic_written) | |
1903 | mutex_unlock(&fi->inmem_lock); | |
1904 | return rc; | |
1905 | } | |
1906 | ||
1907 | if (atomic_written) { | |
1908 | struct inmem_pages *cur; | |
1909 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
1910 | if (cur->page == page) { | |
1911 | cur->page = newpage; | |
1912 | break; | |
1913 | } | |
1914 | mutex_unlock(&fi->inmem_lock); | |
1915 | put_page(page); | |
1916 | get_page(newpage); | |
1917 | } | |
1918 | ||
1919 | if (PagePrivate(page)) | |
1920 | SetPagePrivate(newpage); | |
1921 | set_page_private(newpage, page_private(page)); | |
1922 | ||
1923 | migrate_page_copy(newpage, page); | |
1924 | ||
1925 | return MIGRATEPAGE_SUCCESS; | |
1926 | } | |
1927 | #endif | |
1928 | ||
eb47b800 JK |
1929 | const struct address_space_operations f2fs_dblock_aops = { |
1930 | .readpage = f2fs_read_data_page, | |
1931 | .readpages = f2fs_read_data_pages, | |
1932 | .writepage = f2fs_write_data_page, | |
1933 | .writepages = f2fs_write_data_pages, | |
1934 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1935 | .write_end = f2fs_write_end, |
eb47b800 | 1936 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1937 | .invalidatepage = f2fs_invalidate_page, |
1938 | .releasepage = f2fs_release_page, | |
eb47b800 | 1939 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1940 | .bmap = f2fs_bmap, |
5b7a487c WG |
1941 | #ifdef CONFIG_MIGRATION |
1942 | .migratepage = f2fs_migrate_page, | |
1943 | #endif | |
eb47b800 | 1944 | }; |