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Commit | Line | Data |
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0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
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 | |
36951b38 CY |
32 | static bool __is_cp_guaranteed(struct page *page) |
33 | { | |
34 | struct address_space *mapping = page->mapping; | |
35 | struct inode *inode; | |
36 | struct f2fs_sb_info *sbi; | |
37 | ||
38 | if (!mapping) | |
39 | return false; | |
40 | ||
41 | inode = mapping->host; | |
42 | sbi = F2FS_I_SB(inode); | |
43 | ||
44 | if (inode->i_ino == F2FS_META_INO(sbi) || | |
45 | inode->i_ino == F2FS_NODE_INO(sbi) || | |
46 | S_ISDIR(inode->i_mode) || | |
47 | is_cold_data(page)) | |
48 | return true; | |
49 | return false; | |
50 | } | |
51 | ||
4246a0b6 | 52 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 53 | { |
f568849e LT |
54 | struct bio_vec *bvec; |
55 | int i; | |
93dfe2ac | 56 | |
8b038c70 | 57 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
1ecc0c5c | 58 | if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) |
8b038c70 CY |
59 | bio->bi_error = -EIO; |
60 | #endif | |
61 | ||
4375a336 | 62 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 63 | if (bio->bi_error) { |
0b81d077 | 64 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 65 | } else { |
0b81d077 | 66 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
67 | return; |
68 | } | |
69 | } | |
70 | ||
12377024 CY |
71 | bio_for_each_segment_all(bvec, bio, i) { |
72 | struct page *page = bvec->bv_page; | |
f1e88660 | 73 | |
4246a0b6 | 74 | if (!bio->bi_error) { |
237c0790 JK |
75 | if (!PageUptodate(page)) |
76 | SetPageUptodate(page); | |
f1e88660 JK |
77 | } else { |
78 | ClearPageUptodate(page); | |
79 | SetPageError(page); | |
80 | } | |
81 | unlock_page(page); | |
82 | } | |
f1e88660 JK |
83 | bio_put(bio); |
84 | } | |
85 | ||
4246a0b6 | 86 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 87 | { |
1b1f559f | 88 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
89 | struct bio_vec *bvec; |
90 | int i; | |
93dfe2ac | 91 | |
f568849e | 92 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac | 93 | struct page *page = bvec->bv_page; |
36951b38 | 94 | enum count_type type = WB_DATA_TYPE(page); |
93dfe2ac | 95 | |
0b81d077 | 96 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 97 | |
4246a0b6 | 98 | if (unlikely(bio->bi_error)) { |
5114a97a | 99 | mapping_set_error(page->mapping, -EIO); |
38f91ca8 | 100 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac | 101 | } |
36951b38 CY |
102 | dec_page_count(sbi, type); |
103 | clear_cold_data(page); | |
93dfe2ac | 104 | end_page_writeback(page); |
f568849e | 105 | } |
36951b38 | 106 | if (!get_pages(sbi, F2FS_WB_CP_DATA) && |
f5730184 | 107 | wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
108 | wake_up(&sbi->cp_wait); |
109 | ||
110 | bio_put(bio); | |
111 | } | |
112 | ||
3c62be17 JK |
113 | /* |
114 | * Return true, if pre_bio's bdev is same as its target device. | |
115 | */ | |
116 | struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, | |
117 | block_t blk_addr, struct bio *bio) | |
118 | { | |
119 | struct block_device *bdev = sbi->sb->s_bdev; | |
120 | int i; | |
121 | ||
122 | for (i = 0; i < sbi->s_ndevs; i++) { | |
123 | if (FDEV(i).start_blk <= blk_addr && | |
124 | FDEV(i).end_blk >= blk_addr) { | |
125 | blk_addr -= FDEV(i).start_blk; | |
126 | bdev = FDEV(i).bdev; | |
127 | break; | |
128 | } | |
129 | } | |
130 | if (bio) { | |
131 | bio->bi_bdev = bdev; | |
132 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); | |
133 | } | |
134 | return bdev; | |
135 | } | |
136 | ||
137 | int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) | |
138 | { | |
139 | int i; | |
140 | ||
141 | for (i = 0; i < sbi->s_ndevs; i++) | |
142 | if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) | |
143 | return i; | |
144 | return 0; | |
145 | } | |
146 | ||
147 | static bool __same_bdev(struct f2fs_sb_info *sbi, | |
148 | block_t blk_addr, struct bio *bio) | |
149 | { | |
150 | return f2fs_target_device(sbi, blk_addr, NULL) == bio->bi_bdev; | |
151 | } | |
152 | ||
940a6d34 GZ |
153 | /* |
154 | * Low-level block read/write IO operations. | |
155 | */ | |
156 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
157 | int npages, bool is_read) | |
158 | { | |
159 | struct bio *bio; | |
160 | ||
740432f8 | 161 | bio = f2fs_bio_alloc(npages); |
940a6d34 | 162 | |
3c62be17 | 163 | f2fs_target_device(sbi, blk_addr, bio); |
940a6d34 | 164 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 165 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
166 | |
167 | return bio; | |
168 | } | |
169 | ||
4fc29c1a LT |
170 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
171 | struct bio *bio, enum page_type type) | |
f5730184 | 172 | { |
4fc29c1a | 173 | if (!is_read_io(bio_op(bio))) { |
0bfd7a09 | 174 | if (f2fs_sb_mounted_blkzoned(sbi->sb) && |
52763a4b | 175 | current->plug && (type == DATA || type == NODE)) |
19a5f5e2 JK |
176 | blk_finish_plug(current->plug); |
177 | } | |
4e49ea4a | 178 | submit_bio(bio); |
f5730184 JK |
179 | } |
180 | ||
458e6197 | 181 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 182 | { |
458e6197 | 183 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
184 | |
185 | if (!io->bio) | |
186 | return; | |
187 | ||
04d328de | 188 | if (is_read_io(fio->op)) |
2ace38e0 | 189 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 190 | else |
2ace38e0 | 191 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 192 | |
04d328de MC |
193 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
194 | ||
4fc29c1a | 195 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
196 | io->bio = NULL; |
197 | } | |
198 | ||
0c3a5797 CY |
199 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
200 | struct page *page, nid_t ino) | |
0fd785eb | 201 | { |
0fd785eb CY |
202 | struct bio_vec *bvec; |
203 | struct page *target; | |
204 | int i; | |
205 | ||
0c3a5797 | 206 | if (!io->bio) |
0fd785eb | 207 | return false; |
0c3a5797 CY |
208 | |
209 | if (!inode && !page && !ino) | |
210 | return true; | |
0fd785eb CY |
211 | |
212 | bio_for_each_segment_all(bvec, io->bio, i) { | |
213 | ||
0b81d077 | 214 | if (bvec->bv_page->mapping) |
0fd785eb | 215 | target = bvec->bv_page; |
0b81d077 JK |
216 | else |
217 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 218 | |
0c3a5797 CY |
219 | if (inode && inode == target->mapping->host) |
220 | return true; | |
221 | if (page && page == target) | |
222 | return true; | |
223 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 224 | return true; |
0fd785eb CY |
225 | } |
226 | ||
0fd785eb CY |
227 | return false; |
228 | } | |
229 | ||
0c3a5797 CY |
230 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
231 | struct page *page, nid_t ino, | |
232 | enum page_type type) | |
233 | { | |
234 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
235 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
236 | bool ret; | |
237 | ||
238 | down_read(&io->io_rwsem); | |
239 | ret = __has_merged_page(io, inode, page, ino); | |
240 | up_read(&io->io_rwsem); | |
241 | return ret; | |
242 | } | |
243 | ||
244 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
245 | struct inode *inode, struct page *page, | |
246 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
247 | { |
248 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
249 | struct f2fs_bio_info *io; | |
250 | ||
251 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
252 | ||
df0f8dc0 | 253 | down_write(&io->io_rwsem); |
458e6197 | 254 | |
0c3a5797 CY |
255 | if (!__has_merged_page(io, inode, page, ino)) |
256 | goto out; | |
257 | ||
458e6197 JK |
258 | /* change META to META_FLUSH in the checkpoint procedure */ |
259 | if (type >= META_FLUSH) { | |
260 | io->fio.type = META_FLUSH; | |
04d328de | 261 | io->fio.op = REQ_OP_WRITE; |
70fd7614 CH |
262 | io->fio.op_flags = REQ_PREFLUSH | REQ_META | REQ_PRIO; |
263 | if (!test_opt(sbi, NOBARRIER)) | |
264 | io->fio.op_flags |= REQ_FUA; | |
458e6197 JK |
265 | } |
266 | __submit_merged_bio(io); | |
0c3a5797 | 267 | out: |
df0f8dc0 | 268 | up_write(&io->io_rwsem); |
93dfe2ac JK |
269 | } |
270 | ||
0c3a5797 CY |
271 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
272 | int rw) | |
273 | { | |
274 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
275 | } | |
276 | ||
277 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
278 | struct inode *inode, struct page *page, | |
279 | nid_t ino, enum page_type type, int rw) | |
280 | { | |
281 | if (has_merged_page(sbi, inode, page, ino, type)) | |
282 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
283 | } | |
284 | ||
406657dd CY |
285 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
286 | { | |
287 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
288 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
289 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
290 | } | |
291 | ||
93dfe2ac JK |
292 | /* |
293 | * Fill the locked page with data located in the block address. | |
294 | * Return unlocked page. | |
295 | */ | |
05ca3632 | 296 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 297 | { |
93dfe2ac | 298 | struct bio *bio; |
0b81d077 JK |
299 | struct page *page = fio->encrypted_page ? |
300 | fio->encrypted_page : fio->page; | |
93dfe2ac | 301 | |
2ace38e0 | 302 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 303 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
304 | |
305 | /* Allocate a new bio */ | |
04d328de | 306 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 307 | |
09cbfeaf | 308 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 309 | bio_put(bio); |
93dfe2ac JK |
310 | return -EFAULT; |
311 | } | |
04d328de | 312 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 313 | |
4fc29c1a | 314 | __submit_bio(fio->sbi, bio, fio->type); |
93dfe2ac JK |
315 | return 0; |
316 | } | |
317 | ||
05ca3632 | 318 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 319 | { |
05ca3632 | 320 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 321 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 322 | struct f2fs_bio_info *io; |
04d328de | 323 | bool is_read = is_read_io(fio->op); |
4375a336 | 324 | struct page *bio_page; |
93dfe2ac | 325 | |
940a6d34 | 326 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 327 | |
7a9d7548 CY |
328 | if (fio->old_blkaddr != NEW_ADDR) |
329 | verify_block_addr(sbi, fio->old_blkaddr); | |
330 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 331 | |
36951b38 CY |
332 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
333 | ||
334 | if (!is_read) | |
335 | inc_page_count(sbi, WB_DATA_TYPE(bio_page)); | |
336 | ||
df0f8dc0 | 337 | down_write(&io->io_rwsem); |
93dfe2ac | 338 | |
7a9d7548 | 339 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
3c62be17 JK |
340 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) || |
341 | !__same_bdev(sbi, fio->new_blkaddr, io->bio))) | |
458e6197 | 342 | __submit_merged_bio(io); |
93dfe2ac JK |
343 | alloc_new: |
344 | if (io->bio == NULL) { | |
7a9d7548 | 345 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
664ba972 | 346 | BIO_MAX_PAGES, is_read); |
458e6197 | 347 | io->fio = *fio; |
93dfe2ac JK |
348 | } |
349 | ||
09cbfeaf KS |
350 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
351 | PAGE_SIZE) { | |
458e6197 | 352 | __submit_merged_bio(io); |
93dfe2ac JK |
353 | goto alloc_new; |
354 | } | |
355 | ||
7a9d7548 | 356 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 357 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 358 | |
df0f8dc0 | 359 | up_write(&io->io_rwsem); |
05ca3632 | 360 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
361 | } |
362 | ||
46008c6d CY |
363 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
364 | { | |
365 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
366 | __le32 *addr_array; | |
367 | ||
368 | /* Get physical address of data block */ | |
369 | addr_array = blkaddr_in_node(rn); | |
370 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
371 | } | |
372 | ||
0a8165d7 | 373 | /* |
eb47b800 JK |
374 | * Lock ordering for the change of data block address: |
375 | * ->data_page | |
376 | * ->node_page | |
377 | * update block addresses in the node page | |
378 | */ | |
216a620a | 379 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 380 | { |
46008c6d CY |
381 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
382 | __set_data_blkaddr(dn); | |
383 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 384 | dn->node_changed = true; |
eb47b800 JK |
385 | } |
386 | ||
f28b3434 CY |
387 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
388 | { | |
389 | dn->data_blkaddr = blkaddr; | |
390 | set_data_blkaddr(dn); | |
391 | f2fs_update_extent_cache(dn); | |
392 | } | |
393 | ||
46008c6d CY |
394 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
395 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 396 | { |
4081363f | 397 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 398 | |
46008c6d CY |
399 | if (!count) |
400 | return 0; | |
401 | ||
91942321 | 402 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 403 | return -EPERM; |
46008c6d | 404 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
405 | return -ENOSPC; |
406 | ||
46008c6d CY |
407 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
408 | dn->ofs_in_node, count); | |
409 | ||
410 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
411 | ||
412 | for (; count > 0; dn->ofs_in_node++) { | |
413 | block_t blkaddr = | |
414 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
415 | if (blkaddr == NULL_ADDR) { | |
416 | dn->data_blkaddr = NEW_ADDR; | |
417 | __set_data_blkaddr(dn); | |
418 | count--; | |
419 | } | |
420 | } | |
421 | ||
422 | if (set_page_dirty(dn->node_page)) | |
423 | dn->node_changed = true; | |
eb47b800 JK |
424 | return 0; |
425 | } | |
426 | ||
46008c6d CY |
427 | /* Should keep dn->ofs_in_node unchanged */ |
428 | int reserve_new_block(struct dnode_of_data *dn) | |
429 | { | |
430 | unsigned int ofs_in_node = dn->ofs_in_node; | |
431 | int ret; | |
432 | ||
433 | ret = reserve_new_blocks(dn, 1); | |
434 | dn->ofs_in_node = ofs_in_node; | |
435 | return ret; | |
436 | } | |
437 | ||
b600965c HL |
438 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
439 | { | |
440 | bool need_put = dn->inode_page ? false : true; | |
441 | int err; | |
442 | ||
443 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
444 | if (err) | |
445 | return err; | |
a8865372 | 446 | |
b600965c HL |
447 | if (dn->data_blkaddr == NULL_ADDR) |
448 | err = reserve_new_block(dn); | |
a8865372 | 449 | if (err || need_put) |
b600965c HL |
450 | f2fs_put_dnode(dn); |
451 | return err; | |
452 | } | |
453 | ||
759af1c9 | 454 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 455 | { |
028a41e8 | 456 | struct extent_info ei; |
759af1c9 | 457 | struct inode *inode = dn->inode; |
028a41e8 | 458 | |
759af1c9 FL |
459 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
460 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
461 | return 0; | |
429511cd | 462 | } |
028a41e8 | 463 | |
759af1c9 | 464 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
465 | } |
466 | ||
a56c7c6f | 467 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 468 | int op_flags, bool for_write) |
eb47b800 | 469 | { |
eb47b800 JK |
470 | struct address_space *mapping = inode->i_mapping; |
471 | struct dnode_of_data dn; | |
472 | struct page *page; | |
cb3bc9ee | 473 | struct extent_info ei; |
eb47b800 | 474 | int err; |
cf04e8eb | 475 | struct f2fs_io_info fio = { |
05ca3632 | 476 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 477 | .type = DATA, |
04d328de MC |
478 | .op = REQ_OP_READ, |
479 | .op_flags = op_flags, | |
4375a336 | 480 | .encrypted_page = NULL, |
cf04e8eb | 481 | }; |
eb47b800 | 482 | |
4375a336 JK |
483 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
484 | return read_mapping_page(mapping, index, NULL); | |
485 | ||
a56c7c6f | 486 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
487 | if (!page) |
488 | return ERR_PTR(-ENOMEM); | |
489 | ||
cb3bc9ee CY |
490 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
491 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
492 | goto got_it; | |
493 | } | |
494 | ||
eb47b800 | 495 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 496 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
497 | if (err) |
498 | goto put_err; | |
eb47b800 JK |
499 | f2fs_put_dnode(&dn); |
500 | ||
6bacf52f | 501 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
502 | err = -ENOENT; |
503 | goto put_err; | |
650495de | 504 | } |
cb3bc9ee | 505 | got_it: |
43f3eae1 JK |
506 | if (PageUptodate(page)) { |
507 | unlock_page(page); | |
eb47b800 | 508 | return page; |
43f3eae1 | 509 | } |
eb47b800 | 510 | |
d59ff4df JK |
511 | /* |
512 | * A new dentry page is allocated but not able to be written, since its | |
513 | * new inode page couldn't be allocated due to -ENOSPC. | |
514 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
515 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
516 | */ | |
517 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 518 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
519 | if (!PageUptodate(page)) |
520 | SetPageUptodate(page); | |
43f3eae1 | 521 | unlock_page(page); |
d59ff4df JK |
522 | return page; |
523 | } | |
eb47b800 | 524 | |
7a9d7548 | 525 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
526 | fio.page = page; |
527 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 528 | if (err) |
86531d6b | 529 | goto put_err; |
43f3eae1 | 530 | return page; |
86531d6b JK |
531 | |
532 | put_err: | |
533 | f2fs_put_page(page, 1); | |
534 | return ERR_PTR(err); | |
43f3eae1 JK |
535 | } |
536 | ||
537 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
538 | { | |
539 | struct address_space *mapping = inode->i_mapping; | |
540 | struct page *page; | |
541 | ||
542 | page = find_get_page(mapping, index); | |
543 | if (page && PageUptodate(page)) | |
544 | return page; | |
545 | f2fs_put_page(page, 0); | |
546 | ||
70fd7614 | 547 | page = get_read_data_page(inode, index, 0, false); |
43f3eae1 JK |
548 | if (IS_ERR(page)) |
549 | return page; | |
550 | ||
551 | if (PageUptodate(page)) | |
552 | return page; | |
553 | ||
554 | wait_on_page_locked(page); | |
555 | if (unlikely(!PageUptodate(page))) { | |
556 | f2fs_put_page(page, 0); | |
557 | return ERR_PTR(-EIO); | |
558 | } | |
559 | return page; | |
560 | } | |
561 | ||
562 | /* | |
563 | * If it tries to access a hole, return an error. | |
564 | * Because, the callers, functions in dir.c and GC, should be able to know | |
565 | * whether this page exists or not. | |
566 | */ | |
a56c7c6f JK |
567 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
568 | bool for_write) | |
43f3eae1 JK |
569 | { |
570 | struct address_space *mapping = inode->i_mapping; | |
571 | struct page *page; | |
572 | repeat: | |
70fd7614 | 573 | page = get_read_data_page(inode, index, 0, for_write); |
43f3eae1 JK |
574 | if (IS_ERR(page)) |
575 | return page; | |
393ff91f | 576 | |
43f3eae1 | 577 | /* wait for read completion */ |
393ff91f | 578 | lock_page(page); |
6bacf52f | 579 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
580 | f2fs_put_page(page, 1); |
581 | goto repeat; | |
eb47b800 | 582 | } |
1563ac75 CY |
583 | if (unlikely(!PageUptodate(page))) { |
584 | f2fs_put_page(page, 1); | |
585 | return ERR_PTR(-EIO); | |
586 | } | |
eb47b800 JK |
587 | return page; |
588 | } | |
589 | ||
0a8165d7 | 590 | /* |
eb47b800 JK |
591 | * Caller ensures that this data page is never allocated. |
592 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 593 | * |
4f4124d0 CY |
594 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
595 | * f2fs_unlock_op(). | |
470f00e9 CY |
596 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
597 | * ipage should be released by this function. | |
eb47b800 | 598 | */ |
64aa7ed9 | 599 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 600 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 601 | { |
eb47b800 JK |
602 | struct address_space *mapping = inode->i_mapping; |
603 | struct page *page; | |
604 | struct dnode_of_data dn; | |
605 | int err; | |
7612118a | 606 | |
a56c7c6f | 607 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
608 | if (!page) { |
609 | /* | |
610 | * before exiting, we should make sure ipage will be released | |
611 | * if any error occur. | |
612 | */ | |
613 | f2fs_put_page(ipage, 1); | |
01f28610 | 614 | return ERR_PTR(-ENOMEM); |
470f00e9 | 615 | } |
eb47b800 | 616 | |
a8865372 | 617 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 618 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
619 | if (err) { |
620 | f2fs_put_page(page, 1); | |
eb47b800 | 621 | return ERR_PTR(err); |
a8865372 | 622 | } |
01f28610 JK |
623 | if (!ipage) |
624 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
625 | |
626 | if (PageUptodate(page)) | |
01f28610 | 627 | goto got_it; |
eb47b800 JK |
628 | |
629 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 630 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
631 | if (!PageUptodate(page)) |
632 | SetPageUptodate(page); | |
eb47b800 | 633 | } else { |
4375a336 | 634 | f2fs_put_page(page, 1); |
a8865372 | 635 | |
7612118a JK |
636 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
637 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
638 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 639 | if (IS_ERR(page)) |
7612118a | 640 | return page; |
eb47b800 | 641 | } |
01f28610 | 642 | got_it: |
9edcdabf | 643 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 644 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 645 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
646 | return page; |
647 | } | |
648 | ||
bfad7c2d JK |
649 | static int __allocate_data_block(struct dnode_of_data *dn) |
650 | { | |
4081363f | 651 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 652 | struct f2fs_summary sum; |
bfad7c2d | 653 | struct node_info ni; |
976e4c50 | 654 | pgoff_t fofs; |
46008c6d | 655 | blkcnt_t count = 1; |
bfad7c2d | 656 | |
91942321 | 657 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 658 | return -EPERM; |
df6136ef CY |
659 | |
660 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
661 | if (dn->data_blkaddr == NEW_ADDR) | |
662 | goto alloc; | |
663 | ||
46008c6d | 664 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
665 | return -ENOSPC; |
666 | ||
df6136ef | 667 | alloc: |
bfad7c2d JK |
668 | get_node_info(sbi, dn->nid, &ni); |
669 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
670 | ||
df6136ef | 671 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
6ae1be13 | 672 | &sum, CURSEG_WARM_DATA); |
216a620a | 673 | set_data_blkaddr(dn); |
bfad7c2d | 674 | |
976e4c50 | 675 | /* update i_size */ |
81ca7350 | 676 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 677 | dn->ofs_in_node; |
09cbfeaf | 678 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 679 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 680 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
681 | return 0; |
682 | } | |
683 | ||
c040ff9d JK |
684 | static inline bool __force_buffered_io(struct inode *inode, int rw) |
685 | { | |
686 | return ((f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) || | |
687 | (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS)) || | |
688 | F2FS_I_SB(inode)->s_ndevs); | |
689 | } | |
690 | ||
a7de6086 | 691 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 692 | { |
b439b103 | 693 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 694 | struct f2fs_map_blocks map; |
a7de6086 | 695 | int err = 0; |
59b802e5 | 696 | |
0080c507 | 697 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
698 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
699 | if (map.m_len > map.m_lblk) | |
700 | map.m_len -= map.m_lblk; | |
701 | else | |
702 | map.m_len = 0; | |
703 | ||
da85985c | 704 | map.m_next_pgofs = NULL; |
2a340760 | 705 | |
24b84912 | 706 | if (iocb->ki_flags & IOCB_DIRECT) { |
a7de6086 JK |
707 | err = f2fs_convert_inline_inode(inode); |
708 | if (err) | |
709 | return err; | |
c040ff9d JK |
710 | return f2fs_map_blocks(inode, &map, 1, |
711 | __force_buffered_io(inode, WRITE) ? | |
712 | F2FS_GET_BLOCK_PRE_AIO : | |
713 | F2FS_GET_BLOCK_PRE_DIO); | |
24b84912 JK |
714 | } |
715 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
a7de6086 JK |
716 | err = f2fs_convert_inline_inode(inode); |
717 | if (err) | |
718 | return err; | |
b439b103 | 719 | } |
24b84912 JK |
720 | if (!f2fs_has_inline_data(inode)) |
721 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
a7de6086 | 722 | return err; |
59b802e5 JK |
723 | } |
724 | ||
0a8165d7 | 725 | /* |
003a3e1d JK |
726 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
727 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
728 | * If original data blocks are allocated, then give them to blockdev. |
729 | * Otherwise, | |
730 | * a. preallocate requested block addresses | |
731 | * b. do not use extent cache for better performance | |
732 | * c. give the block addresses to blockdev | |
eb47b800 | 733 | */ |
d323d005 | 734 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 735 | int create, int flag) |
eb47b800 | 736 | { |
003a3e1d | 737 | unsigned int maxblocks = map->m_len; |
eb47b800 | 738 | struct dnode_of_data dn; |
f9811703 | 739 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 740 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 741 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 742 | int err = 0, ofs = 1; |
46008c6d CY |
743 | unsigned int ofs_in_node, last_ofs_in_node; |
744 | blkcnt_t prealloc; | |
a2e7d1bf | 745 | struct extent_info ei; |
7df3a431 | 746 | block_t blkaddr; |
eb47b800 | 747 | |
dfd02e4d CY |
748 | if (!maxblocks) |
749 | return 0; | |
750 | ||
003a3e1d JK |
751 | map->m_len = 0; |
752 | map->m_flags = 0; | |
753 | ||
754 | /* it only supports block size == page size */ | |
755 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 756 | end = pgofs + maxblocks; |
eb47b800 | 757 | |
24b84912 | 758 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
759 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
760 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
761 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 762 | goto out; |
a2e7d1bf | 763 | } |
bfad7c2d | 764 | |
4fe71e88 | 765 | next_dnode: |
59b802e5 | 766 | if (create) |
3104af35 | 767 | f2fs_lock_op(sbi); |
eb47b800 JK |
768 | |
769 | /* When reading holes, we need its node page */ | |
770 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 771 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 772 | if (err) { |
43473f96 CY |
773 | if (flag == F2FS_GET_BLOCK_BMAP) |
774 | map->m_pblk = 0; | |
da85985c | 775 | if (err == -ENOENT) { |
bfad7c2d | 776 | err = 0; |
da85985c CY |
777 | if (map->m_next_pgofs) |
778 | *map->m_next_pgofs = | |
779 | get_next_page_offset(&dn, pgofs); | |
780 | } | |
bfad7c2d | 781 | goto unlock_out; |
848753aa | 782 | } |
973163fc | 783 | |
46008c6d | 784 | prealloc = 0; |
230436b3 | 785 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 786 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
787 | |
788 | next_block: | |
789 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
790 | ||
791 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 792 | if (create) { |
f9811703 CY |
793 | if (unlikely(f2fs_cp_error(sbi))) { |
794 | err = -EIO; | |
4fe71e88 | 795 | goto sync_out; |
f9811703 | 796 | } |
24b84912 | 797 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
798 | if (blkaddr == NULL_ADDR) { |
799 | prealloc++; | |
800 | last_ofs_in_node = dn.ofs_in_node; | |
801 | } | |
24b84912 JK |
802 | } else { |
803 | err = __allocate_data_block(&dn); | |
6f2d8ed6 | 804 | if (!err) |
91942321 | 805 | set_inode_flag(inode, FI_APPEND_WRITE); |
24b84912 | 806 | } |
973163fc | 807 | if (err) |
4fe71e88 | 808 | goto sync_out; |
973163fc | 809 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 810 | blkaddr = dn.data_blkaddr; |
973163fc | 811 | } else { |
43473f96 CY |
812 | if (flag == F2FS_GET_BLOCK_BMAP) { |
813 | map->m_pblk = 0; | |
814 | goto sync_out; | |
815 | } | |
da85985c CY |
816 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
817 | blkaddr == NULL_ADDR) { | |
818 | if (map->m_next_pgofs) | |
819 | *map->m_next_pgofs = pgofs + 1; | |
820 | } | |
973163fc | 821 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 822 | blkaddr != NEW_ADDR) |
4fe71e88 | 823 | goto sync_out; |
e2b4e2bc | 824 | } |
e2b4e2bc | 825 | } |
eb47b800 | 826 | |
46008c6d CY |
827 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
828 | goto skip; | |
829 | ||
4fe71e88 CY |
830 | if (map->m_len == 0) { |
831 | /* preallocated unwritten block should be mapped for fiemap. */ | |
832 | if (blkaddr == NEW_ADDR) | |
833 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
834 | map->m_flags |= F2FS_MAP_MAPPED; | |
835 | ||
836 | map->m_pblk = blkaddr; | |
837 | map->m_len = 1; | |
838 | } else if ((map->m_pblk != NEW_ADDR && | |
839 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 840 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 841 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
842 | ofs++; |
843 | map->m_len++; | |
844 | } else { | |
845 | goto sync_out; | |
846 | } | |
bfad7c2d | 847 | |
46008c6d | 848 | skip: |
bfad7c2d JK |
849 | dn.ofs_in_node++; |
850 | pgofs++; | |
851 | ||
46008c6d CY |
852 | /* preallocate blocks in batch for one dnode page */ |
853 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
854 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 855 | |
46008c6d CY |
856 | dn.ofs_in_node = ofs_in_node; |
857 | err = reserve_new_blocks(&dn, prealloc); | |
858 | if (err) | |
859 | goto sync_out; | |
bfad7c2d | 860 | |
46008c6d CY |
861 | map->m_len += dn.ofs_in_node - ofs_in_node; |
862 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
863 | err = -ENOSPC; | |
864 | goto sync_out; | |
3104af35 | 865 | } |
46008c6d CY |
866 | dn.ofs_in_node = end_offset; |
867 | } | |
868 | ||
869 | if (pgofs >= end) | |
870 | goto sync_out; | |
871 | else if (dn.ofs_in_node < end_offset) | |
872 | goto next_block; | |
873 | ||
46008c6d CY |
874 | f2fs_put_dnode(&dn); |
875 | ||
876 | if (create) { | |
877 | f2fs_unlock_op(sbi); | |
6f2d8ed6 | 878 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 879 | } |
46008c6d | 880 | goto next_dnode; |
7df3a431 | 881 | |
bfad7c2d | 882 | sync_out: |
eb47b800 | 883 | f2fs_put_dnode(&dn); |
bfad7c2d | 884 | unlock_out: |
2a340760 | 885 | if (create) { |
3104af35 | 886 | f2fs_unlock_op(sbi); |
6f2d8ed6 | 887 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 888 | } |
bfad7c2d | 889 | out: |
003a3e1d | 890 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 891 | return err; |
eb47b800 JK |
892 | } |
893 | ||
003a3e1d | 894 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
895 | struct buffer_head *bh, int create, int flag, |
896 | pgoff_t *next_pgofs) | |
003a3e1d JK |
897 | { |
898 | struct f2fs_map_blocks map; | |
a7de6086 | 899 | int err; |
003a3e1d JK |
900 | |
901 | map.m_lblk = iblock; | |
902 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 903 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 904 | |
a7de6086 JK |
905 | err = f2fs_map_blocks(inode, &map, create, flag); |
906 | if (!err) { | |
003a3e1d JK |
907 | map_bh(bh, inode->i_sb, map.m_pblk); |
908 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
909 | bh->b_size = map.m_len << inode->i_blkbits; | |
910 | } | |
a7de6086 | 911 | return err; |
003a3e1d JK |
912 | } |
913 | ||
ccfb3000 | 914 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
915 | struct buffer_head *bh_result, int create, int flag, |
916 | pgoff_t *next_pgofs) | |
e2b4e2bc | 917 | { |
da85985c CY |
918 | return __get_data_block(inode, iblock, bh_result, create, |
919 | flag, next_pgofs); | |
e2b4e2bc CY |
920 | } |
921 | ||
922 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
923 | struct buffer_head *bh_result, int create) |
924 | { | |
e2b4e2bc | 925 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 926 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
927 | } |
928 | ||
e2b4e2bc | 929 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
930 | struct buffer_head *bh_result, int create) |
931 | { | |
179448bf | 932 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 933 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
934 | return -EFBIG; |
935 | ||
e2b4e2bc | 936 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 937 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
938 | } |
939 | ||
7f63eb77 JK |
940 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
941 | { | |
942 | return (offset >> inode->i_blkbits); | |
943 | } | |
944 | ||
945 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
946 | { | |
947 | return (blk << inode->i_blkbits); | |
948 | } | |
949 | ||
9ab70134 JK |
950 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
951 | u64 start, u64 len) | |
952 | { | |
7f63eb77 JK |
953 | struct buffer_head map_bh; |
954 | sector_t start_blk, last_blk; | |
da85985c | 955 | pgoff_t next_pgofs; |
7f63eb77 JK |
956 | u64 logical = 0, phys = 0, size = 0; |
957 | u32 flags = 0; | |
7f63eb77 JK |
958 | int ret = 0; |
959 | ||
960 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
961 | if (ret) | |
962 | return ret; | |
963 | ||
67f8cf3c JK |
964 | if (f2fs_has_inline_data(inode)) { |
965 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
966 | if (ret != -EAGAIN) | |
967 | return ret; | |
968 | } | |
969 | ||
5955102c | 970 | inode_lock(inode); |
de1475cc | 971 | |
7f63eb77 JK |
972 | if (logical_to_blk(inode, len) == 0) |
973 | len = blk_to_logical(inode, 1); | |
974 | ||
975 | start_blk = logical_to_blk(inode, start); | |
976 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 977 | |
7f63eb77 JK |
978 | next: |
979 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
980 | map_bh.b_size = len; | |
981 | ||
e2b4e2bc | 982 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 983 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
984 | if (ret) |
985 | goto out; | |
986 | ||
987 | /* HOLE */ | |
988 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 989 | start_blk = next_pgofs; |
58736fa6 CY |
990 | |
991 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
992 | F2FS_I_SB(inode)->max_file_blocks)) | |
9a950d52 | 993 | goto prep_next; |
58736fa6 | 994 | |
9a950d52 FL |
995 | flags |= FIEMAP_EXTENT_LAST; |
996 | } | |
7f63eb77 | 997 | |
da5af127 CY |
998 | if (size) { |
999 | if (f2fs_encrypted_inode(inode)) | |
1000 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
1001 | ||
9a950d52 FL |
1002 | ret = fiemap_fill_next_extent(fieinfo, logical, |
1003 | phys, size, flags); | |
da5af127 | 1004 | } |
7f63eb77 | 1005 | |
9a950d52 FL |
1006 | if (start_blk > last_blk || ret) |
1007 | goto out; | |
7f63eb77 | 1008 | |
9a950d52 FL |
1009 | logical = blk_to_logical(inode, start_blk); |
1010 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
1011 | size = map_bh.b_size; | |
1012 | flags = 0; | |
1013 | if (buffer_unwritten(&map_bh)) | |
1014 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 1015 | |
9a950d52 | 1016 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 1017 | |
9a950d52 | 1018 | prep_next: |
7f63eb77 JK |
1019 | cond_resched(); |
1020 | if (fatal_signal_pending(current)) | |
1021 | ret = -EINTR; | |
1022 | else | |
1023 | goto next; | |
1024 | out: | |
1025 | if (ret == 1) | |
1026 | ret = 0; | |
1027 | ||
5955102c | 1028 | inode_unlock(inode); |
7f63eb77 | 1029 | return ret; |
9ab70134 JK |
1030 | } |
1031 | ||
6a7a3aed WY |
1032 | static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
1033 | unsigned nr_pages) | |
78682f79 CY |
1034 | { |
1035 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1036 | struct fscrypt_ctx *ctx = NULL; | |
78682f79 CY |
1037 | struct bio *bio; |
1038 | ||
1039 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1040 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
1041 | if (IS_ERR(ctx)) | |
1042 | return ERR_CAST(ctx); | |
1043 | ||
1044 | /* wait the page to be moved by cleaning */ | |
1045 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
1046 | } | |
1047 | ||
1048 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
1049 | if (!bio) { | |
1050 | if (ctx) | |
1051 | fscrypt_release_ctx(ctx); | |
1052 | return ERR_PTR(-ENOMEM); | |
1053 | } | |
3c62be17 | 1054 | f2fs_target_device(sbi, blkaddr, bio); |
78682f79 CY |
1055 | bio->bi_end_io = f2fs_read_end_io; |
1056 | bio->bi_private = ctx; | |
1057 | ||
1058 | return bio; | |
1059 | } | |
1060 | ||
f1e88660 JK |
1061 | /* |
1062 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1063 | * Major change was from block_size == page_size in f2fs by default. | |
1064 | */ | |
1065 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1066 | struct list_head *pages, struct page *page, | |
1067 | unsigned nr_pages) | |
1068 | { | |
1069 | struct bio *bio = NULL; | |
1070 | unsigned page_idx; | |
1071 | sector_t last_block_in_bio = 0; | |
1072 | struct inode *inode = mapping->host; | |
1073 | const unsigned blkbits = inode->i_blkbits; | |
1074 | const unsigned blocksize = 1 << blkbits; | |
1075 | sector_t block_in_file; | |
1076 | sector_t last_block; | |
1077 | sector_t last_block_in_file; | |
1078 | sector_t block_nr; | |
f1e88660 JK |
1079 | struct f2fs_map_blocks map; |
1080 | ||
1081 | map.m_pblk = 0; | |
1082 | map.m_lblk = 0; | |
1083 | map.m_len = 0; | |
1084 | map.m_flags = 0; | |
da85985c | 1085 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1086 | |
1087 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1088 | ||
1089 | prefetchw(&page->flags); | |
1090 | if (pages) { | |
1091 | page = list_entry(pages->prev, struct page, lru); | |
1092 | list_del(&page->lru); | |
1093 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1094 | page->index, |
1095 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1096 | goto next_page; |
1097 | } | |
1098 | ||
1099 | block_in_file = (sector_t)page->index; | |
1100 | last_block = block_in_file + nr_pages; | |
1101 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1102 | blkbits; | |
1103 | if (last_block > last_block_in_file) | |
1104 | last_block = last_block_in_file; | |
1105 | ||
1106 | /* | |
1107 | * Map blocks using the previous result first. | |
1108 | */ | |
1109 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1110 | block_in_file > map.m_lblk && | |
1111 | block_in_file < (map.m_lblk + map.m_len)) | |
1112 | goto got_it; | |
1113 | ||
1114 | /* | |
1115 | * Then do more f2fs_map_blocks() calls until we are | |
1116 | * done with this page. | |
1117 | */ | |
1118 | map.m_flags = 0; | |
1119 | ||
1120 | if (block_in_file < last_block) { | |
1121 | map.m_lblk = block_in_file; | |
1122 | map.m_len = last_block - block_in_file; | |
1123 | ||
46c9e141 | 1124 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1125 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1126 | goto set_error_page; |
1127 | } | |
1128 | got_it: | |
1129 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1130 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1131 | SetPageMappedToDisk(page); | |
1132 | ||
1133 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1134 | SetPageUptodate(page); | |
1135 | goto confused; | |
1136 | } | |
1137 | } else { | |
09cbfeaf | 1138 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
1139 | if (!PageUptodate(page)) |
1140 | SetPageUptodate(page); | |
f1e88660 JK |
1141 | unlock_page(page); |
1142 | goto next_page; | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * This page will go to BIO. Do we need to send this | |
1147 | * BIO off first? | |
1148 | */ | |
3c62be17 JK |
1149 | if (bio && (last_block_in_bio != block_nr - 1 || |
1150 | !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) { | |
f1e88660 | 1151 | submit_and_realloc: |
4fc29c1a | 1152 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1153 | bio = NULL; |
1154 | } | |
1155 | if (bio == NULL) { | |
78682f79 | 1156 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1d353eb7 JK |
1157 | if (IS_ERR(bio)) { |
1158 | bio = NULL; | |
f1e88660 | 1159 | goto set_error_page; |
4375a336 | 1160 | } |
04d328de | 1161 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1162 | } |
1163 | ||
1164 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1165 | goto submit_and_realloc; | |
1166 | ||
1167 | last_block_in_bio = block_nr; | |
1168 | goto next_page; | |
1169 | set_error_page: | |
1170 | SetPageError(page); | |
09cbfeaf | 1171 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1172 | unlock_page(page); |
1173 | goto next_page; | |
1174 | confused: | |
1175 | if (bio) { | |
4fc29c1a | 1176 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1177 | bio = NULL; |
1178 | } | |
1179 | unlock_page(page); | |
1180 | next_page: | |
1181 | if (pages) | |
09cbfeaf | 1182 | put_page(page); |
f1e88660 JK |
1183 | } |
1184 | BUG_ON(pages && !list_empty(pages)); | |
1185 | if (bio) | |
4fc29c1a | 1186 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1187 | return 0; |
1188 | } | |
1189 | ||
eb47b800 JK |
1190 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1191 | { | |
9ffe0fb5 | 1192 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1193 | int ret = -EAGAIN; |
9ffe0fb5 | 1194 | |
c20e89cd CY |
1195 | trace_f2fs_readpage(page, DATA); |
1196 | ||
e1c42045 | 1197 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1198 | if (f2fs_has_inline_data(inode)) |
1199 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1200 | if (ret == -EAGAIN) |
f1e88660 | 1201 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1202 | return ret; |
eb47b800 JK |
1203 | } |
1204 | ||
1205 | static int f2fs_read_data_pages(struct file *file, | |
1206 | struct address_space *mapping, | |
1207 | struct list_head *pages, unsigned nr_pages) | |
1208 | { | |
9ffe0fb5 | 1209 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1210 | struct page *page = list_entry(pages->prev, struct page, lru); |
1211 | ||
1212 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1213 | |
1214 | /* If the file has inline data, skip readpages */ | |
1215 | if (f2fs_has_inline_data(inode)) | |
1216 | return 0; | |
1217 | ||
f1e88660 | 1218 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1219 | } |
1220 | ||
05ca3632 | 1221 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1222 | { |
05ca3632 | 1223 | struct page *page = fio->page; |
eb47b800 | 1224 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1225 | struct dnode_of_data dn; |
1226 | int err = 0; | |
1227 | ||
1228 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1229 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1230 | if (err) |
1231 | return err; | |
1232 | ||
28bc106b | 1233 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1234 | |
1235 | /* This page is already truncated */ | |
7a9d7548 | 1236 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1237 | ClearPageUptodate(page); |
eb47b800 | 1238 | goto out_writepage; |
2bca1e23 | 1239 | } |
eb47b800 | 1240 | |
4375a336 | 1241 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1242 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1243 | |
1244 | /* wait for GCed encrypted page writeback */ | |
1245 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1246 | fio->old_blkaddr); |
b32e4482 JK |
1247 | retry_encrypt: |
1248 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
9c4bb8a3 DG |
1249 | PAGE_SIZE, 0, |
1250 | fio->page->index, | |
1251 | gfp_flags); | |
4375a336 JK |
1252 | if (IS_ERR(fio->encrypted_page)) { |
1253 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1254 | if (err == -ENOMEM) { |
1255 | /* flush pending ios and wait for a while */ | |
1256 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1257 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1258 | gfp_flags |= __GFP_NOFAIL; | |
1259 | err = 0; | |
1260 | goto retry_encrypt; | |
1261 | } | |
4375a336 JK |
1262 | goto out_writepage; |
1263 | } | |
1264 | } | |
1265 | ||
eb47b800 JK |
1266 | set_page_writeback(page); |
1267 | ||
1268 | /* | |
1269 | * If current allocation needs SSR, | |
1270 | * it had better in-place writes for updated data. | |
1271 | */ | |
7a9d7548 | 1272 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1273 | !is_cold_data(page) && |
2da3e027 | 1274 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1275 | need_inplace_update(inode))) { |
05ca3632 | 1276 | rewrite_data_page(fio); |
91942321 | 1277 | set_inode_flag(inode, FI_UPDATE_WRITE); |
8ce67cb0 | 1278 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1279 | } else { |
05ca3632 | 1280 | write_data_page(&dn, fio); |
8ce67cb0 | 1281 | trace_f2fs_do_write_data_page(page, OPU); |
91942321 | 1282 | set_inode_flag(inode, FI_APPEND_WRITE); |
3c6c2beb | 1283 | if (page->index == 0) |
91942321 | 1284 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
eb47b800 JK |
1285 | } |
1286 | out_writepage: | |
1287 | f2fs_put_dnode(&dn); | |
1288 | return err; | |
1289 | } | |
1290 | ||
1291 | static int f2fs_write_data_page(struct page *page, | |
1292 | struct writeback_control *wbc) | |
1293 | { | |
1294 | struct inode *inode = page->mapping->host; | |
4081363f | 1295 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1296 | loff_t i_size = i_size_read(inode); |
1297 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1298 | >> PAGE_SHIFT; |
26de9b11 | 1299 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1300 | unsigned offset = 0; |
39936837 | 1301 | bool need_balance_fs = false; |
eb47b800 | 1302 | int err = 0; |
458e6197 | 1303 | struct f2fs_io_info fio = { |
05ca3632 | 1304 | .sbi = sbi, |
458e6197 | 1305 | .type = DATA, |
04d328de | 1306 | .op = REQ_OP_WRITE, |
7637241e | 1307 | .op_flags = wbc_to_write_flags(wbc), |
05ca3632 | 1308 | .page = page, |
4375a336 | 1309 | .encrypted_page = NULL, |
458e6197 | 1310 | }; |
eb47b800 | 1311 | |
ecda0de3 CY |
1312 | trace_f2fs_writepage(page, DATA); |
1313 | ||
eb47b800 | 1314 | if (page->index < end_index) |
39936837 | 1315 | goto write; |
eb47b800 JK |
1316 | |
1317 | /* | |
1318 | * If the offset is out-of-range of file size, | |
1319 | * this page does not have to be written to disk. | |
1320 | */ | |
09cbfeaf | 1321 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1322 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1323 | goto out; |
eb47b800 | 1324 | |
09cbfeaf | 1325 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1326 | write: |
caf0047e | 1327 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1328 | goto redirty_out; |
1e84371f JK |
1329 | if (f2fs_is_drop_cache(inode)) |
1330 | goto out; | |
e6e5f561 JK |
1331 | /* we should not write 0'th page having journal header */ |
1332 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1333 | (!wbc->for_reclaim && | |
1334 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1335 | goto redirty_out; |
eb47b800 | 1336 | |
cf779cab JK |
1337 | /* we should bypass data pages to proceed the kworkder jobs */ |
1338 | if (unlikely(f2fs_cp_error(sbi))) { | |
7f319975 | 1339 | mapping_set_error(page->mapping, -EIO); |
a7ffdbe2 | 1340 | goto out; |
cf779cab JK |
1341 | } |
1342 | ||
39936837 | 1343 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1344 | if (S_ISDIR(inode->i_mode)) { |
05ca3632 | 1345 | err = do_write_data_page(&fio); |
8618b881 JK |
1346 | goto done; |
1347 | } | |
9ffe0fb5 | 1348 | |
8618b881 | 1349 | if (!wbc->for_reclaim) |
39936837 | 1350 | need_balance_fs = true; |
7f3037a5 | 1351 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1352 | goto redirty_out; |
eb47b800 | 1353 | |
b3d208f9 | 1354 | err = -EAGAIN; |
8618b881 | 1355 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1356 | if (f2fs_has_inline_data(inode)) |
1357 | err = f2fs_write_inline_data(inode, page); | |
1358 | if (err == -EAGAIN) | |
05ca3632 | 1359 | err = do_write_data_page(&fio); |
26de9b11 JK |
1360 | if (F2FS_I(inode)->last_disk_size < psize) |
1361 | F2FS_I(inode)->last_disk_size = psize; | |
8618b881 JK |
1362 | f2fs_unlock_op(sbi); |
1363 | done: | |
1364 | if (err && err != -ENOENT) | |
1365 | goto redirty_out; | |
eb47b800 | 1366 | |
39936837 | 1367 | out: |
a7ffdbe2 | 1368 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1369 | if (err) |
1370 | ClearPageUptodate(page); | |
0c3a5797 CY |
1371 | |
1372 | if (wbc->for_reclaim) { | |
1373 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1374 | remove_dirty_inode(inode); | |
1375 | } | |
1376 | ||
eb47b800 | 1377 | unlock_page(page); |
2c4db1a6 | 1378 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1379 | |
1380 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1381 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1382 | |
eb47b800 JK |
1383 | return 0; |
1384 | ||
eb47b800 | 1385 | redirty_out: |
76f60268 | 1386 | redirty_page_for_writepage(wbc, page); |
0002b61b CY |
1387 | if (!err) |
1388 | return AOP_WRITEPAGE_ACTIVATE; | |
b230e6ca JK |
1389 | unlock_page(page); |
1390 | return err; | |
fa9150a8 NJ |
1391 | } |
1392 | ||
8f46dcae CY |
1393 | /* |
1394 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1395 | * The major change is making write step of cold data page separately from | |
1396 | * warm/hot data page. | |
1397 | */ | |
1398 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b230e6ca | 1399 | struct writeback_control *wbc) |
8f46dcae CY |
1400 | { |
1401 | int ret = 0; | |
1402 | int done = 0; | |
1403 | struct pagevec pvec; | |
1404 | int nr_pages; | |
1405 | pgoff_t uninitialized_var(writeback_index); | |
1406 | pgoff_t index; | |
1407 | pgoff_t end; /* Inclusive */ | |
1408 | pgoff_t done_index; | |
1409 | int cycled; | |
1410 | int range_whole = 0; | |
1411 | int tag; | |
6ca56ca4 | 1412 | int nwritten = 0; |
8f46dcae CY |
1413 | |
1414 | pagevec_init(&pvec, 0); | |
46ae957f | 1415 | |
8f46dcae CY |
1416 | if (wbc->range_cyclic) { |
1417 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1418 | index = writeback_index; | |
1419 | if (index == 0) | |
1420 | cycled = 1; | |
1421 | else | |
1422 | cycled = 0; | |
1423 | end = -1; | |
1424 | } else { | |
09cbfeaf KS |
1425 | index = wbc->range_start >> PAGE_SHIFT; |
1426 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1427 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1428 | range_whole = 1; | |
1429 | cycled = 1; /* ignore range_cyclic tests */ | |
1430 | } | |
1431 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1432 | tag = PAGECACHE_TAG_TOWRITE; | |
1433 | else | |
1434 | tag = PAGECACHE_TAG_DIRTY; | |
1435 | retry: | |
1436 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1437 | tag_pages_for_writeback(mapping, index, end); | |
1438 | done_index = index; | |
1439 | while (!done && (index <= end)) { | |
1440 | int i; | |
1441 | ||
1442 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1443 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1444 | if (nr_pages == 0) | |
1445 | break; | |
1446 | ||
1447 | for (i = 0; i < nr_pages; i++) { | |
1448 | struct page *page = pvec.pages[i]; | |
1449 | ||
1450 | if (page->index > end) { | |
1451 | done = 1; | |
1452 | break; | |
1453 | } | |
1454 | ||
1455 | done_index = page->index; | |
1456 | ||
1457 | lock_page(page); | |
1458 | ||
1459 | if (unlikely(page->mapping != mapping)) { | |
1460 | continue_unlock: | |
1461 | unlock_page(page); | |
1462 | continue; | |
1463 | } | |
1464 | ||
1465 | if (!PageDirty(page)) { | |
1466 | /* someone wrote it for us */ | |
1467 | goto continue_unlock; | |
1468 | } | |
1469 | ||
8f46dcae CY |
1470 | if (PageWriteback(page)) { |
1471 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1472 | f2fs_wait_on_page_writeback(page, |
1473 | DATA, true); | |
8f46dcae CY |
1474 | else |
1475 | goto continue_unlock; | |
1476 | } | |
1477 | ||
1478 | BUG_ON(PageWriteback(page)); | |
1479 | if (!clear_page_dirty_for_io(page)) | |
1480 | goto continue_unlock; | |
1481 | ||
b230e6ca | 1482 | ret = mapping->a_ops->writepage(page, wbc); |
8f46dcae | 1483 | if (unlikely(ret)) { |
0002b61b CY |
1484 | /* |
1485 | * keep nr_to_write, since vfs uses this to | |
1486 | * get # of written pages. | |
1487 | */ | |
1488 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1489 | unlock_page(page); | |
1490 | ret = 0; | |
1491 | continue; | |
1492 | } | |
b230e6ca JK |
1493 | done_index = page->index + 1; |
1494 | done = 1; | |
1495 | break; | |
6ca56ca4 CY |
1496 | } else { |
1497 | nwritten++; | |
8f46dcae CY |
1498 | } |
1499 | ||
1500 | if (--wbc->nr_to_write <= 0 && | |
1501 | wbc->sync_mode == WB_SYNC_NONE) { | |
1502 | done = 1; | |
1503 | break; | |
1504 | } | |
1505 | } | |
1506 | pagevec_release(&pvec); | |
1507 | cond_resched(); | |
1508 | } | |
1509 | ||
8f46dcae CY |
1510 | if (!cycled && !done) { |
1511 | cycled = 1; | |
1512 | index = 0; | |
1513 | end = writeback_index - 1; | |
1514 | goto retry; | |
1515 | } | |
1516 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1517 | mapping->writeback_index = done_index; | |
1518 | ||
6ca56ca4 CY |
1519 | if (nwritten) |
1520 | f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping), mapping->host, | |
1521 | NULL, 0, DATA, WRITE); | |
1522 | ||
8f46dcae CY |
1523 | return ret; |
1524 | } | |
1525 | ||
25ca923b | 1526 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1527 | struct writeback_control *wbc) |
1528 | { | |
1529 | struct inode *inode = mapping->host; | |
4081363f | 1530 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 1531 | struct blk_plug plug; |
eb47b800 | 1532 | int ret; |
eb47b800 | 1533 | |
cfb185a1 | 1534 | /* deal with chardevs and other special file */ |
1535 | if (!mapping->a_ops->writepage) | |
1536 | return 0; | |
1537 | ||
6a290544 CY |
1538 | /* skip writing if there is no dirty page in this inode */ |
1539 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1540 | return 0; | |
1541 | ||
a1257023 JK |
1542 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1543 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1544 | available_free_memory(sbi, DIRTY_DENTS)) | |
1545 | goto skip_write; | |
1546 | ||
d323d005 | 1547 | /* skip writing during file defragment */ |
91942321 | 1548 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
1549 | goto skip_write; |
1550 | ||
d5669f7b JK |
1551 | /* during POR, we don't need to trigger writepage at all. */ |
1552 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1553 | goto skip_write; | |
1554 | ||
d31c7c3f YH |
1555 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1556 | ||
9dfa1baf | 1557 | blk_start_plug(&plug); |
b230e6ca | 1558 | ret = f2fs_write_cache_pages(mapping, wbc); |
9dfa1baf | 1559 | blk_finish_plug(&plug); |
28ea6162 JK |
1560 | /* |
1561 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1562 | * to detect pending bios. | |
1563 | */ | |
458e6197 | 1564 | |
c227f912 | 1565 | remove_dirty_inode(inode); |
eb47b800 | 1566 | return ret; |
d3baf95d JK |
1567 | |
1568 | skip_write: | |
a7ffdbe2 | 1569 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1570 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1571 | return 0; |
eb47b800 JK |
1572 | } |
1573 | ||
3aab8f82 CY |
1574 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1575 | { | |
1576 | struct inode *inode = mapping->host; | |
819d9153 | 1577 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1578 | |
819d9153 JK |
1579 | if (to > i_size) { |
1580 | truncate_pagecache(inode, i_size); | |
1581 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1582 | } |
1583 | } | |
1584 | ||
2aadac08 JK |
1585 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1586 | struct page *page, loff_t pos, unsigned len, | |
1587 | block_t *blk_addr, bool *node_changed) | |
1588 | { | |
1589 | struct inode *inode = page->mapping->host; | |
1590 | pgoff_t index = page->index; | |
1591 | struct dnode_of_data dn; | |
1592 | struct page *ipage; | |
b4d07a3e JK |
1593 | bool locked = false; |
1594 | struct extent_info ei; | |
2aadac08 JK |
1595 | int err = 0; |
1596 | ||
24b84912 JK |
1597 | /* |
1598 | * we already allocated all the blocks, so we don't need to get | |
1599 | * the block addresses when there is no need to fill the page. | |
1600 | */ | |
5d4c0af4 | 1601 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE) |
24b84912 JK |
1602 | return 0; |
1603 | ||
b4d07a3e | 1604 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1605 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1606 | f2fs_lock_op(sbi); |
1607 | locked = true; | |
1608 | } | |
1609 | restart: | |
2aadac08 JK |
1610 | /* check inline_data */ |
1611 | ipage = get_node_page(sbi, inode->i_ino); | |
1612 | if (IS_ERR(ipage)) { | |
1613 | err = PTR_ERR(ipage); | |
1614 | goto unlock_out; | |
1615 | } | |
1616 | ||
1617 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1618 | ||
1619 | if (f2fs_has_inline_data(inode)) { | |
1620 | if (pos + len <= MAX_INLINE_DATA) { | |
1621 | read_inline_data(page, ipage); | |
91942321 | 1622 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
1623 | if (inode->i_nlink) |
1624 | set_inline_node(ipage); | |
2aadac08 JK |
1625 | } else { |
1626 | err = f2fs_convert_inline_page(&dn, page); | |
1627 | if (err) | |
b4d07a3e JK |
1628 | goto out; |
1629 | if (dn.data_blkaddr == NULL_ADDR) | |
1630 | err = f2fs_get_block(&dn, index); | |
1631 | } | |
1632 | } else if (locked) { | |
1633 | err = f2fs_get_block(&dn, index); | |
1634 | } else { | |
1635 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1636 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1637 | } else { | |
b4d07a3e JK |
1638 | /* hole case */ |
1639 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1640 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1641 | f2fs_put_dnode(&dn); |
1642 | f2fs_lock_op(sbi); | |
1643 | locked = true; | |
1644 | goto restart; | |
1645 | } | |
2aadac08 JK |
1646 | } |
1647 | } | |
b4d07a3e | 1648 | |
2aadac08 JK |
1649 | /* convert_inline_page can make node_changed */ |
1650 | *blk_addr = dn.data_blkaddr; | |
1651 | *node_changed = dn.node_changed; | |
b4d07a3e | 1652 | out: |
2aadac08 JK |
1653 | f2fs_put_dnode(&dn); |
1654 | unlock_out: | |
b4d07a3e JK |
1655 | if (locked) |
1656 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1657 | return err; |
1658 | } | |
1659 | ||
eb47b800 JK |
1660 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1661 | loff_t pos, unsigned len, unsigned flags, | |
1662 | struct page **pagep, void **fsdata) | |
1663 | { | |
1664 | struct inode *inode = mapping->host; | |
4081363f | 1665 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1666 | struct page *page = NULL; |
09cbfeaf | 1667 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1668 | bool need_balance = false; |
1669 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1670 | int err = 0; |
1671 | ||
62aed044 CY |
1672 | trace_f2fs_write_begin(inode, pos, len, flags); |
1673 | ||
5f727395 JK |
1674 | /* |
1675 | * We should check this at this moment to avoid deadlock on inode page | |
1676 | * and #0 page. The locking rule for inline_data conversion should be: | |
1677 | * lock_page(page #0) -> lock_page(inode_page) | |
1678 | */ | |
1679 | if (index != 0) { | |
1680 | err = f2fs_convert_inline_inode(inode); | |
1681 | if (err) | |
1682 | goto fail; | |
1683 | } | |
afcb7ca0 | 1684 | repeat: |
eb47b800 | 1685 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1686 | if (!page) { |
1687 | err = -ENOMEM; | |
1688 | goto fail; | |
1689 | } | |
d5f66990 | 1690 | |
eb47b800 JK |
1691 | *pagep = page; |
1692 | ||
2aadac08 JK |
1693 | err = prepare_write_begin(sbi, page, pos, len, |
1694 | &blkaddr, &need_balance); | |
9ba69cf9 | 1695 | if (err) |
2aadac08 | 1696 | goto fail; |
9ba69cf9 | 1697 | |
7f3037a5 | 1698 | if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) { |
2a340760 | 1699 | unlock_page(page); |
2c4db1a6 | 1700 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1701 | lock_page(page); |
1702 | if (page->mapping != mapping) { | |
1703 | /* The page got truncated from under us */ | |
1704 | f2fs_put_page(page, 1); | |
1705 | goto repeat; | |
1706 | } | |
1707 | } | |
1708 | ||
fec1d657 | 1709 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1710 | |
08b39fbd CY |
1711 | /* wait for GCed encrypted page writeback */ |
1712 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1713 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1714 | |
649d7df2 JK |
1715 | if (len == PAGE_SIZE || PageUptodate(page)) |
1716 | return 0; | |
eb47b800 | 1717 | |
2aadac08 | 1718 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1719 | zero_user_segment(page, 0, PAGE_SIZE); |
649d7df2 | 1720 | SetPageUptodate(page); |
eb47b800 | 1721 | } else { |
78682f79 | 1722 | struct bio *bio; |
d54c795b | 1723 | |
78682f79 CY |
1724 | bio = f2fs_grab_bio(inode, blkaddr, 1); |
1725 | if (IS_ERR(bio)) { | |
1726 | err = PTR_ERR(bio); | |
3aab8f82 | 1727 | goto fail; |
eb47b800 | 1728 | } |
70fd7614 | 1729 | bio->bi_opf = REQ_OP_READ; |
78682f79 CY |
1730 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
1731 | bio_put(bio); | |
1732 | err = -EFAULT; | |
1733 | goto fail; | |
1734 | } | |
1735 | ||
4fc29c1a | 1736 | __submit_bio(sbi, bio, DATA); |
d54c795b | 1737 | |
393ff91f | 1738 | lock_page(page); |
6bacf52f | 1739 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1740 | f2fs_put_page(page, 1); |
1741 | goto repeat; | |
eb47b800 | 1742 | } |
1563ac75 CY |
1743 | if (unlikely(!PageUptodate(page))) { |
1744 | err = -EIO; | |
1745 | goto fail; | |
4375a336 | 1746 | } |
eb47b800 | 1747 | } |
eb47b800 | 1748 | return 0; |
9ba69cf9 | 1749 | |
3aab8f82 | 1750 | fail: |
86531d6b | 1751 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1752 | f2fs_write_failed(mapping, pos + len); |
1753 | return err; | |
eb47b800 JK |
1754 | } |
1755 | ||
a1dd3c13 JK |
1756 | static int f2fs_write_end(struct file *file, |
1757 | struct address_space *mapping, | |
1758 | loff_t pos, unsigned len, unsigned copied, | |
1759 | struct page *page, void *fsdata) | |
1760 | { | |
1761 | struct inode *inode = page->mapping->host; | |
1762 | ||
dfb2bf38 CY |
1763 | trace_f2fs_write_end(inode, pos, len, copied); |
1764 | ||
649d7df2 JK |
1765 | /* |
1766 | * This should be come from len == PAGE_SIZE, and we expect copied | |
1767 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
1768 | * let generic_perform_write() try to copy data again through copied=0. | |
1769 | */ | |
1770 | if (!PageUptodate(page)) { | |
1771 | if (unlikely(copied != PAGE_SIZE)) | |
1772 | copied = 0; | |
1773 | else | |
1774 | SetPageUptodate(page); | |
1775 | } | |
1776 | if (!copied) | |
1777 | goto unlock_out; | |
1778 | ||
34ba94ba | 1779 | set_page_dirty(page); |
a1dd3c13 | 1780 | |
fc9581c8 JK |
1781 | if (pos + copied > i_size_read(inode)) |
1782 | f2fs_i_size_write(inode, pos + copied); | |
649d7df2 | 1783 | unlock_out: |
3024c9a1 | 1784 | f2fs_put_page(page, 1); |
d0239e1b | 1785 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1786 | return copied; |
1787 | } | |
1788 | ||
6f673763 OS |
1789 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1790 | loff_t offset) | |
944fcfc1 JK |
1791 | { |
1792 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1793 | |
944fcfc1 JK |
1794 | if (offset & blocksize_mask) |
1795 | return -EINVAL; | |
1796 | ||
5b46f25d AV |
1797 | if (iov_iter_alignment(iter) & blocksize_mask) |
1798 | return -EINVAL; | |
1799 | ||
944fcfc1 JK |
1800 | return 0; |
1801 | } | |
1802 | ||
c8b8e32d | 1803 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 1804 | { |
b439b103 | 1805 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1806 | struct inode *inode = mapping->host; |
1807 | size_t count = iov_iter_count(iter); | |
c8b8e32d | 1808 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 1809 | int rw = iov_iter_rw(iter); |
3aab8f82 | 1810 | int err; |
944fcfc1 | 1811 | |
b439b103 | 1812 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1813 | if (err) |
1814 | return err; | |
9ffe0fb5 | 1815 | |
c040ff9d | 1816 | if (__force_buffered_io(inode, rw)) |
36abef4e | 1817 | return 0; |
fcc85a4d | 1818 | |
5302fb00 | 1819 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 1820 | |
82e0a5aa | 1821 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
c8b8e32d | 1822 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
82e0a5aa CY |
1823 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
1824 | ||
1825 | if (rw == WRITE) { | |
6bfc4919 | 1826 | if (err > 0) |
91942321 | 1827 | set_inode_flag(inode, FI_UPDATE_WRITE); |
6bfc4919 JK |
1828 | else if (err < 0) |
1829 | f2fs_write_failed(mapping, offset + count); | |
1830 | } | |
70407fad | 1831 | |
5302fb00 | 1832 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 1833 | |
3aab8f82 | 1834 | return err; |
eb47b800 JK |
1835 | } |
1836 | ||
487261f3 CY |
1837 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1838 | unsigned int length) | |
eb47b800 JK |
1839 | { |
1840 | struct inode *inode = page->mapping->host; | |
487261f3 | 1841 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1842 | |
487261f3 | 1843 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1844 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1845 | return; |
1846 | ||
487261f3 | 1847 | if (PageDirty(page)) { |
933439c8 | 1848 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 1849 | dec_page_count(sbi, F2FS_DIRTY_META); |
933439c8 | 1850 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 1851 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
933439c8 | 1852 | } else { |
487261f3 | 1853 | inode_dec_dirty_pages(inode); |
933439c8 CY |
1854 | remove_dirty_inode(inode); |
1855 | } | |
487261f3 | 1856 | } |
decd36b6 CY |
1857 | |
1858 | /* This is atomic written page, keep Private */ | |
1859 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1860 | return; | |
1861 | ||
23dc974e | 1862 | set_page_private(page, 0); |
eb47b800 JK |
1863 | ClearPagePrivate(page); |
1864 | } | |
1865 | ||
487261f3 | 1866 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1867 | { |
f68daeeb JK |
1868 | /* If this is dirty page, keep PagePrivate */ |
1869 | if (PageDirty(page)) | |
1870 | return 0; | |
1871 | ||
decd36b6 CY |
1872 | /* This is atomic written page, keep Private */ |
1873 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1874 | return 0; | |
1875 | ||
23dc974e | 1876 | set_page_private(page, 0); |
eb47b800 | 1877 | ClearPagePrivate(page); |
c3850aa1 | 1878 | return 1; |
eb47b800 JK |
1879 | } |
1880 | ||
fe76b796 JK |
1881 | /* |
1882 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
1883 | * in very high speed storages. (e.g., pmem) | |
1884 | */ | |
1885 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
1886 | { | |
1887 | struct address_space *mapping = page->mapping; | |
1888 | unsigned long flags; | |
1889 | ||
1890 | if (unlikely(!mapping)) | |
1891 | return; | |
1892 | ||
1893 | spin_lock(&mapping->private_lock); | |
1894 | lock_page_memcg(page); | |
1895 | SetPageDirty(page); | |
1896 | spin_unlock(&mapping->private_lock); | |
1897 | ||
1898 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
1899 | WARN_ON_ONCE(!PageUptodate(page)); | |
1900 | account_page_dirtied(page, mapping); | |
1901 | radix_tree_tag_set(&mapping->page_tree, | |
1902 | page_index(page), PAGECACHE_TAG_DIRTY); | |
1903 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
1904 | unlock_page_memcg(page); | |
1905 | ||
1906 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
1907 | return; | |
1908 | } | |
1909 | ||
eb47b800 JK |
1910 | static int f2fs_set_data_page_dirty(struct page *page) |
1911 | { | |
1912 | struct address_space *mapping = page->mapping; | |
1913 | struct inode *inode = mapping->host; | |
1914 | ||
26c6b887 JK |
1915 | trace_f2fs_set_page_dirty(page, DATA); |
1916 | ||
237c0790 JK |
1917 | if (!PageUptodate(page)) |
1918 | SetPageUptodate(page); | |
34ba94ba | 1919 | |
1e84371f | 1920 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1921 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1922 | register_inmem_page(inode, page); | |
1923 | return 1; | |
1924 | } | |
1925 | /* | |
1926 | * Previously, this page has been registered, we just | |
1927 | * return here. | |
1928 | */ | |
1929 | return 0; | |
34ba94ba JK |
1930 | } |
1931 | ||
eb47b800 | 1932 | if (!PageDirty(page)) { |
fe76b796 | 1933 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 1934 | update_dirty_page(inode, page); |
eb47b800 JK |
1935 | return 1; |
1936 | } | |
1937 | return 0; | |
1938 | } | |
1939 | ||
c01e54b7 JK |
1940 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1941 | { | |
454ae7e5 CY |
1942 | struct inode *inode = mapping->host; |
1943 | ||
1d373a0e JK |
1944 | if (f2fs_has_inline_data(inode)) |
1945 | return 0; | |
1946 | ||
1947 | /* make sure allocating whole blocks */ | |
1948 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1949 | filemap_write_and_wait(mapping); | |
1950 | ||
e2b4e2bc | 1951 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1952 | } |
1953 | ||
5b7a487c WG |
1954 | #ifdef CONFIG_MIGRATION |
1955 | #include <linux/migrate.h> | |
1956 | ||
1957 | int f2fs_migrate_page(struct address_space *mapping, | |
1958 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
1959 | { | |
1960 | int rc, extra_count; | |
1961 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
1962 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
1963 | ||
1964 | BUG_ON(PageWriteback(page)); | |
1965 | ||
1966 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
1967 | if (atomic_written && !mutex_trylock(&fi->inmem_lock)) | |
1968 | return -EAGAIN; | |
1969 | ||
1970 | /* | |
1971 | * A reference is expected if PagePrivate set when move mapping, | |
1972 | * however F2FS breaks this for maintaining dirty page counts when | |
1973 | * truncating pages. So here adjusting the 'extra_count' make it work. | |
1974 | */ | |
1975 | extra_count = (atomic_written ? 1 : 0) - page_has_private(page); | |
1976 | rc = migrate_page_move_mapping(mapping, newpage, | |
1977 | page, NULL, mode, extra_count); | |
1978 | if (rc != MIGRATEPAGE_SUCCESS) { | |
1979 | if (atomic_written) | |
1980 | mutex_unlock(&fi->inmem_lock); | |
1981 | return rc; | |
1982 | } | |
1983 | ||
1984 | if (atomic_written) { | |
1985 | struct inmem_pages *cur; | |
1986 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
1987 | if (cur->page == page) { | |
1988 | cur->page = newpage; | |
1989 | break; | |
1990 | } | |
1991 | mutex_unlock(&fi->inmem_lock); | |
1992 | put_page(page); | |
1993 | get_page(newpage); | |
1994 | } | |
1995 | ||
1996 | if (PagePrivate(page)) | |
1997 | SetPagePrivate(newpage); | |
1998 | set_page_private(newpage, page_private(page)); | |
1999 | ||
2000 | migrate_page_copy(newpage, page); | |
2001 | ||
2002 | return MIGRATEPAGE_SUCCESS; | |
2003 | } | |
2004 | #endif | |
2005 | ||
eb47b800 JK |
2006 | const struct address_space_operations f2fs_dblock_aops = { |
2007 | .readpage = f2fs_read_data_page, | |
2008 | .readpages = f2fs_read_data_pages, | |
2009 | .writepage = f2fs_write_data_page, | |
2010 | .writepages = f2fs_write_data_pages, | |
2011 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 2012 | .write_end = f2fs_write_end, |
eb47b800 | 2013 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
2014 | .invalidatepage = f2fs_invalidate_page, |
2015 | .releasepage = f2fs_release_page, | |
eb47b800 | 2016 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 2017 | .bmap = f2fs_bmap, |
5b7a487c WG |
2018 | #ifdef CONFIG_MIGRATION |
2019 | .migratepage = f2fs_migrate_page, | |
2020 | #endif | |
eb47b800 | 2021 | }; |