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Commit | Line | Data |
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0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
f1e88660 | 22 | #include <linux/cleancache.h> |
eb47b800 JK |
23 | |
24 | #include "f2fs.h" | |
25 | #include "node.h" | |
26 | #include "segment.h" | |
db9f7c1a | 27 | #include "trace.h" |
848753aa | 28 | #include <trace/events/f2fs.h> |
eb47b800 | 29 | |
4246a0b6 | 30 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 31 | { |
f568849e LT |
32 | struct bio_vec *bvec; |
33 | int i; | |
93dfe2ac | 34 | |
4375a336 | 35 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 36 | if (bio->bi_error) { |
0b81d077 | 37 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 38 | } else { |
0b81d077 | 39 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
40 | return; |
41 | } | |
42 | } | |
43 | ||
12377024 CY |
44 | bio_for_each_segment_all(bvec, bio, i) { |
45 | struct page *page = bvec->bv_page; | |
f1e88660 | 46 | |
4246a0b6 | 47 | if (!bio->bi_error) { |
f1e88660 JK |
48 | SetPageUptodate(page); |
49 | } else { | |
50 | ClearPageUptodate(page); | |
51 | SetPageError(page); | |
52 | } | |
53 | unlock_page(page); | |
54 | } | |
f1e88660 JK |
55 | bio_put(bio); |
56 | } | |
57 | ||
4246a0b6 | 58 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 59 | { |
1b1f559f | 60 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
61 | struct bio_vec *bvec; |
62 | int i; | |
93dfe2ac | 63 | |
f568849e | 64 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
65 | struct page *page = bvec->bv_page; |
66 | ||
0b81d077 | 67 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 68 | |
4246a0b6 | 69 | if (unlikely(bio->bi_error)) { |
93dfe2ac | 70 | set_bit(AS_EIO, &page->mapping->flags); |
744602cf | 71 | f2fs_stop_checkpoint(sbi); |
93dfe2ac JK |
72 | } |
73 | end_page_writeback(page); | |
74 | dec_page_count(sbi, F2FS_WRITEBACK); | |
f568849e | 75 | } |
93dfe2ac | 76 | |
7c506896 | 77 | if (!get_pages(sbi, F2FS_WRITEBACK) && wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
78 | wake_up(&sbi->cp_wait); |
79 | ||
80 | bio_put(bio); | |
81 | } | |
82 | ||
940a6d34 GZ |
83 | /* |
84 | * Low-level block read/write IO operations. | |
85 | */ | |
86 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
87 | int npages, bool is_read) | |
88 | { | |
89 | struct bio *bio; | |
90 | ||
740432f8 | 91 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
92 | |
93 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 94 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 95 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 96 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
97 | |
98 | return bio; | |
99 | } | |
100 | ||
458e6197 | 101 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 102 | { |
458e6197 | 103 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
104 | |
105 | if (!io->bio) | |
106 | return; | |
107 | ||
6a8f8ca5 | 108 | if (is_read_io(fio->rw)) |
2ace38e0 | 109 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 110 | else |
2ace38e0 | 111 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 112 | |
6a8f8ca5 | 113 | submit_bio(fio->rw, io->bio); |
93dfe2ac JK |
114 | io->bio = NULL; |
115 | } | |
116 | ||
0c3a5797 CY |
117 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
118 | struct page *page, nid_t ino) | |
0fd785eb | 119 | { |
0fd785eb CY |
120 | struct bio_vec *bvec; |
121 | struct page *target; | |
122 | int i; | |
123 | ||
0c3a5797 | 124 | if (!io->bio) |
0fd785eb | 125 | return false; |
0c3a5797 CY |
126 | |
127 | if (!inode && !page && !ino) | |
128 | return true; | |
0fd785eb CY |
129 | |
130 | bio_for_each_segment_all(bvec, io->bio, i) { | |
131 | ||
0b81d077 | 132 | if (bvec->bv_page->mapping) |
0fd785eb | 133 | target = bvec->bv_page; |
0b81d077 JK |
134 | else |
135 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 136 | |
0c3a5797 CY |
137 | if (inode && inode == target->mapping->host) |
138 | return true; | |
139 | if (page && page == target) | |
140 | return true; | |
141 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 142 | return true; |
0fd785eb CY |
143 | } |
144 | ||
0fd785eb CY |
145 | return false; |
146 | } | |
147 | ||
0c3a5797 CY |
148 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
149 | struct page *page, nid_t ino, | |
150 | enum page_type type) | |
151 | { | |
152 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
153 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
154 | bool ret; | |
155 | ||
156 | down_read(&io->io_rwsem); | |
157 | ret = __has_merged_page(io, inode, page, ino); | |
158 | up_read(&io->io_rwsem); | |
159 | return ret; | |
160 | } | |
161 | ||
162 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
163 | struct inode *inode, struct page *page, | |
164 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
165 | { |
166 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
167 | struct f2fs_bio_info *io; | |
168 | ||
169 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
170 | ||
df0f8dc0 | 171 | down_write(&io->io_rwsem); |
458e6197 | 172 | |
0c3a5797 CY |
173 | if (!__has_merged_page(io, inode, page, ino)) |
174 | goto out; | |
175 | ||
458e6197 JK |
176 | /* change META to META_FLUSH in the checkpoint procedure */ |
177 | if (type >= META_FLUSH) { | |
178 | io->fio.type = META_FLUSH; | |
0f7b2abd JK |
179 | if (test_opt(sbi, NOBARRIER)) |
180 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
181 | else | |
182 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; | |
458e6197 JK |
183 | } |
184 | __submit_merged_bio(io); | |
0c3a5797 | 185 | out: |
df0f8dc0 | 186 | up_write(&io->io_rwsem); |
93dfe2ac JK |
187 | } |
188 | ||
0c3a5797 CY |
189 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
190 | int rw) | |
191 | { | |
192 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
193 | } | |
194 | ||
195 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
196 | struct inode *inode, struct page *page, | |
197 | nid_t ino, enum page_type type, int rw) | |
198 | { | |
199 | if (has_merged_page(sbi, inode, page, ino, type)) | |
200 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
201 | } | |
202 | ||
406657dd CY |
203 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
204 | { | |
205 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
206 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
207 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
208 | } | |
209 | ||
93dfe2ac JK |
210 | /* |
211 | * Fill the locked page with data located in the block address. | |
212 | * Return unlocked page. | |
213 | */ | |
05ca3632 | 214 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 215 | { |
93dfe2ac | 216 | struct bio *bio; |
0b81d077 JK |
217 | struct page *page = fio->encrypted_page ? |
218 | fio->encrypted_page : fio->page; | |
93dfe2ac | 219 | |
2ace38e0 | 220 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 221 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
222 | |
223 | /* Allocate a new bio */ | |
7a9d7548 | 224 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->rw)); |
93dfe2ac | 225 | |
09cbfeaf | 226 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 227 | bio_put(bio); |
93dfe2ac JK |
228 | return -EFAULT; |
229 | } | |
230 | ||
cf04e8eb | 231 | submit_bio(fio->rw, bio); |
93dfe2ac JK |
232 | return 0; |
233 | } | |
234 | ||
05ca3632 | 235 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 236 | { |
05ca3632 | 237 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 238 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 239 | struct f2fs_bio_info *io; |
940a6d34 | 240 | bool is_read = is_read_io(fio->rw); |
4375a336 | 241 | struct page *bio_page; |
93dfe2ac | 242 | |
940a6d34 | 243 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 244 | |
7a9d7548 CY |
245 | if (fio->old_blkaddr != NEW_ADDR) |
246 | verify_block_addr(sbi, fio->old_blkaddr); | |
247 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 248 | |
df0f8dc0 | 249 | down_write(&io->io_rwsem); |
93dfe2ac | 250 | |
940a6d34 | 251 | if (!is_read) |
93dfe2ac JK |
252 | inc_page_count(sbi, F2FS_WRITEBACK); |
253 | ||
7a9d7548 | 254 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
458e6197 JK |
255 | io->fio.rw != fio->rw)) |
256 | __submit_merged_bio(io); | |
93dfe2ac JK |
257 | alloc_new: |
258 | if (io->bio == NULL) { | |
90a893c7 | 259 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 260 | |
7a9d7548 CY |
261 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
262 | bio_blocks, is_read); | |
458e6197 | 263 | io->fio = *fio; |
93dfe2ac JK |
264 | } |
265 | ||
4375a336 JK |
266 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
267 | ||
09cbfeaf KS |
268 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
269 | PAGE_SIZE) { | |
458e6197 | 270 | __submit_merged_bio(io); |
93dfe2ac JK |
271 | goto alloc_new; |
272 | } | |
273 | ||
7a9d7548 | 274 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 275 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 276 | |
df0f8dc0 | 277 | up_write(&io->io_rwsem); |
05ca3632 | 278 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
279 | } |
280 | ||
46008c6d CY |
281 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
282 | { | |
283 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
284 | __le32 *addr_array; | |
285 | ||
286 | /* Get physical address of data block */ | |
287 | addr_array = blkaddr_in_node(rn); | |
288 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
289 | } | |
290 | ||
0a8165d7 | 291 | /* |
eb47b800 JK |
292 | * Lock ordering for the change of data block address: |
293 | * ->data_page | |
294 | * ->node_page | |
295 | * update block addresses in the node page | |
296 | */ | |
216a620a | 297 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 298 | { |
46008c6d CY |
299 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
300 | __set_data_blkaddr(dn); | |
301 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 302 | dn->node_changed = true; |
eb47b800 JK |
303 | } |
304 | ||
f28b3434 CY |
305 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
306 | { | |
307 | dn->data_blkaddr = blkaddr; | |
308 | set_data_blkaddr(dn); | |
309 | f2fs_update_extent_cache(dn); | |
310 | } | |
311 | ||
46008c6d CY |
312 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
313 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 314 | { |
4081363f | 315 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 316 | |
46008c6d CY |
317 | if (!count) |
318 | return 0; | |
319 | ||
6bacf52f | 320 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 321 | return -EPERM; |
46008c6d | 322 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
323 | return -ENOSPC; |
324 | ||
46008c6d CY |
325 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
326 | dn->ofs_in_node, count); | |
327 | ||
328 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
329 | ||
330 | for (; count > 0; dn->ofs_in_node++) { | |
331 | block_t blkaddr = | |
332 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
333 | if (blkaddr == NULL_ADDR) { | |
334 | dn->data_blkaddr = NEW_ADDR; | |
335 | __set_data_blkaddr(dn); | |
336 | count--; | |
337 | } | |
338 | } | |
339 | ||
340 | if (set_page_dirty(dn->node_page)) | |
341 | dn->node_changed = true; | |
c01e2853 | 342 | |
a18ff063 | 343 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
344 | sync_inode_page(dn); |
345 | return 0; | |
346 | } | |
347 | ||
46008c6d CY |
348 | /* Should keep dn->ofs_in_node unchanged */ |
349 | int reserve_new_block(struct dnode_of_data *dn) | |
350 | { | |
351 | unsigned int ofs_in_node = dn->ofs_in_node; | |
352 | int ret; | |
353 | ||
354 | ret = reserve_new_blocks(dn, 1); | |
355 | dn->ofs_in_node = ofs_in_node; | |
356 | return ret; | |
357 | } | |
358 | ||
b600965c HL |
359 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
360 | { | |
361 | bool need_put = dn->inode_page ? false : true; | |
362 | int err; | |
363 | ||
364 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
365 | if (err) | |
366 | return err; | |
a8865372 | 367 | |
b600965c HL |
368 | if (dn->data_blkaddr == NULL_ADDR) |
369 | err = reserve_new_block(dn); | |
a8865372 | 370 | if (err || need_put) |
b600965c HL |
371 | f2fs_put_dnode(dn); |
372 | return err; | |
373 | } | |
374 | ||
759af1c9 | 375 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 376 | { |
028a41e8 | 377 | struct extent_info ei; |
759af1c9 | 378 | struct inode *inode = dn->inode; |
028a41e8 | 379 | |
759af1c9 FL |
380 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
381 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
382 | return 0; | |
429511cd | 383 | } |
028a41e8 | 384 | |
759af1c9 | 385 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
386 | } |
387 | ||
a56c7c6f JK |
388 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
389 | int rw, bool for_write) | |
eb47b800 | 390 | { |
eb47b800 JK |
391 | struct address_space *mapping = inode->i_mapping; |
392 | struct dnode_of_data dn; | |
393 | struct page *page; | |
cb3bc9ee | 394 | struct extent_info ei; |
eb47b800 | 395 | int err; |
cf04e8eb | 396 | struct f2fs_io_info fio = { |
05ca3632 | 397 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 398 | .type = DATA, |
43f3eae1 | 399 | .rw = rw, |
4375a336 | 400 | .encrypted_page = NULL, |
cf04e8eb | 401 | }; |
eb47b800 | 402 | |
4375a336 JK |
403 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
404 | return read_mapping_page(mapping, index, NULL); | |
405 | ||
a56c7c6f | 406 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
407 | if (!page) |
408 | return ERR_PTR(-ENOMEM); | |
409 | ||
cb3bc9ee CY |
410 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
411 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
412 | goto got_it; | |
413 | } | |
414 | ||
eb47b800 | 415 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 416 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
417 | if (err) |
418 | goto put_err; | |
eb47b800 JK |
419 | f2fs_put_dnode(&dn); |
420 | ||
6bacf52f | 421 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
422 | err = -ENOENT; |
423 | goto put_err; | |
650495de | 424 | } |
cb3bc9ee | 425 | got_it: |
43f3eae1 JK |
426 | if (PageUptodate(page)) { |
427 | unlock_page(page); | |
eb47b800 | 428 | return page; |
43f3eae1 | 429 | } |
eb47b800 | 430 | |
d59ff4df JK |
431 | /* |
432 | * A new dentry page is allocated but not able to be written, since its | |
433 | * new inode page couldn't be allocated due to -ENOSPC. | |
434 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
435 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
436 | */ | |
437 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 438 | zero_user_segment(page, 0, PAGE_SIZE); |
d59ff4df | 439 | SetPageUptodate(page); |
43f3eae1 | 440 | unlock_page(page); |
d59ff4df JK |
441 | return page; |
442 | } | |
eb47b800 | 443 | |
7a9d7548 | 444 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
445 | fio.page = page; |
446 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 447 | if (err) |
86531d6b | 448 | goto put_err; |
43f3eae1 | 449 | return page; |
86531d6b JK |
450 | |
451 | put_err: | |
452 | f2fs_put_page(page, 1); | |
453 | return ERR_PTR(err); | |
43f3eae1 JK |
454 | } |
455 | ||
456 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
457 | { | |
458 | struct address_space *mapping = inode->i_mapping; | |
459 | struct page *page; | |
460 | ||
461 | page = find_get_page(mapping, index); | |
462 | if (page && PageUptodate(page)) | |
463 | return page; | |
464 | f2fs_put_page(page, 0); | |
465 | ||
a56c7c6f | 466 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
467 | if (IS_ERR(page)) |
468 | return page; | |
469 | ||
470 | if (PageUptodate(page)) | |
471 | return page; | |
472 | ||
473 | wait_on_page_locked(page); | |
474 | if (unlikely(!PageUptodate(page))) { | |
475 | f2fs_put_page(page, 0); | |
476 | return ERR_PTR(-EIO); | |
477 | } | |
478 | return page; | |
479 | } | |
480 | ||
481 | /* | |
482 | * If it tries to access a hole, return an error. | |
483 | * Because, the callers, functions in dir.c and GC, should be able to know | |
484 | * whether this page exists or not. | |
485 | */ | |
a56c7c6f JK |
486 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
487 | bool for_write) | |
43f3eae1 JK |
488 | { |
489 | struct address_space *mapping = inode->i_mapping; | |
490 | struct page *page; | |
491 | repeat: | |
a56c7c6f | 492 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
493 | if (IS_ERR(page)) |
494 | return page; | |
393ff91f | 495 | |
43f3eae1 | 496 | /* wait for read completion */ |
393ff91f | 497 | lock_page(page); |
6bacf52f | 498 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
499 | f2fs_put_page(page, 1); |
500 | return ERR_PTR(-EIO); | |
eb47b800 | 501 | } |
6bacf52f | 502 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
503 | f2fs_put_page(page, 1); |
504 | goto repeat; | |
eb47b800 JK |
505 | } |
506 | return page; | |
507 | } | |
508 | ||
0a8165d7 | 509 | /* |
eb47b800 JK |
510 | * Caller ensures that this data page is never allocated. |
511 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 512 | * |
4f4124d0 CY |
513 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
514 | * f2fs_unlock_op(). | |
470f00e9 CY |
515 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
516 | * ipage should be released by this function. | |
eb47b800 | 517 | */ |
64aa7ed9 | 518 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 519 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 520 | { |
eb47b800 JK |
521 | struct address_space *mapping = inode->i_mapping; |
522 | struct page *page; | |
523 | struct dnode_of_data dn; | |
524 | int err; | |
7612118a | 525 | |
a56c7c6f | 526 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
527 | if (!page) { |
528 | /* | |
529 | * before exiting, we should make sure ipage will be released | |
530 | * if any error occur. | |
531 | */ | |
532 | f2fs_put_page(ipage, 1); | |
01f28610 | 533 | return ERR_PTR(-ENOMEM); |
470f00e9 | 534 | } |
eb47b800 | 535 | |
a8865372 | 536 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 537 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
538 | if (err) { |
539 | f2fs_put_page(page, 1); | |
eb47b800 | 540 | return ERR_PTR(err); |
a8865372 | 541 | } |
01f28610 JK |
542 | if (!ipage) |
543 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
544 | |
545 | if (PageUptodate(page)) | |
01f28610 | 546 | goto got_it; |
eb47b800 JK |
547 | |
548 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 549 | zero_user_segment(page, 0, PAGE_SIZE); |
393ff91f | 550 | SetPageUptodate(page); |
eb47b800 | 551 | } else { |
4375a336 | 552 | f2fs_put_page(page, 1); |
a8865372 | 553 | |
7612118a JK |
554 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
555 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
556 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 557 | if (IS_ERR(page)) |
7612118a | 558 | return page; |
eb47b800 | 559 | } |
01f28610 | 560 | got_it: |
9edcdabf | 561 | if (new_i_size && i_size_read(inode) < |
09cbfeaf KS |
562 | ((loff_t)(index + 1) << PAGE_SHIFT)) { |
563 | i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); | |
699489bb JK |
564 | /* Only the directory inode sets new_i_size */ |
565 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
566 | } |
567 | return page; | |
568 | } | |
569 | ||
bfad7c2d JK |
570 | static int __allocate_data_block(struct dnode_of_data *dn) |
571 | { | |
4081363f | 572 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 573 | struct f2fs_summary sum; |
bfad7c2d | 574 | struct node_info ni; |
38aa0889 | 575 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 576 | pgoff_t fofs; |
46008c6d | 577 | blkcnt_t count = 1; |
bfad7c2d JK |
578 | |
579 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
580 | return -EPERM; | |
df6136ef CY |
581 | |
582 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
583 | if (dn->data_blkaddr == NEW_ADDR) | |
584 | goto alloc; | |
585 | ||
46008c6d | 586 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
587 | return -ENOSPC; |
588 | ||
df6136ef | 589 | alloc: |
bfad7c2d JK |
590 | get_node_info(sbi, dn->nid, &ni); |
591 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
592 | ||
38aa0889 JK |
593 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
594 | seg = CURSEG_DIRECT_IO; | |
595 | ||
df6136ef CY |
596 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
597 | &sum, seg); | |
216a620a | 598 | set_data_blkaddr(dn); |
bfad7c2d | 599 | |
976e4c50 | 600 | /* update i_size */ |
81ca7350 | 601 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 602 | dn->ofs_in_node; |
09cbfeaf | 603 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
9edcdabf | 604 | i_size_write(dn->inode, |
09cbfeaf | 605 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
606 | return 0; |
607 | } | |
608 | ||
b439b103 | 609 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 610 | { |
b439b103 | 611 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 612 | struct f2fs_map_blocks map; |
b439b103 | 613 | ssize_t ret = 0; |
59b802e5 | 614 | |
0080c507 JK |
615 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
616 | map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from)); | |
da85985c | 617 | map.m_next_pgofs = NULL; |
2a340760 | 618 | |
24b84912 JK |
619 | if (f2fs_encrypted_inode(inode)) |
620 | return 0; | |
621 | ||
622 | if (iocb->ki_flags & IOCB_DIRECT) { | |
623 | ret = f2fs_convert_inline_inode(inode); | |
624 | if (ret) | |
625 | return ret; | |
626 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); | |
627 | } | |
628 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
b439b103 JK |
629 | ret = f2fs_convert_inline_inode(inode); |
630 | if (ret) | |
631 | return ret; | |
b439b103 | 632 | } |
24b84912 JK |
633 | if (!f2fs_has_inline_data(inode)) |
634 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
b439b103 | 635 | return ret; |
59b802e5 JK |
636 | } |
637 | ||
0a8165d7 | 638 | /* |
003a3e1d JK |
639 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
640 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
641 | * If original data blocks are allocated, then give them to blockdev. |
642 | * Otherwise, | |
643 | * a. preallocate requested block addresses | |
644 | * b. do not use extent cache for better performance | |
645 | * c. give the block addresses to blockdev | |
eb47b800 | 646 | */ |
d323d005 | 647 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 648 | int create, int flag) |
eb47b800 | 649 | { |
003a3e1d | 650 | unsigned int maxblocks = map->m_len; |
eb47b800 | 651 | struct dnode_of_data dn; |
f9811703 | 652 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
bfad7c2d | 653 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
46008c6d | 654 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 655 | int err = 0, ofs = 1; |
46008c6d CY |
656 | unsigned int ofs_in_node, last_ofs_in_node; |
657 | blkcnt_t prealloc; | |
a2e7d1bf | 658 | struct extent_info ei; |
bfad7c2d | 659 | bool allocated = false; |
7df3a431 | 660 | block_t blkaddr; |
eb47b800 | 661 | |
003a3e1d JK |
662 | map->m_len = 0; |
663 | map->m_flags = 0; | |
664 | ||
665 | /* it only supports block size == page size */ | |
666 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 667 | end = pgofs + maxblocks; |
eb47b800 | 668 | |
24b84912 | 669 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
670 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
671 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
672 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 673 | goto out; |
a2e7d1bf | 674 | } |
bfad7c2d | 675 | |
4fe71e88 | 676 | next_dnode: |
59b802e5 | 677 | if (create) |
3104af35 | 678 | f2fs_lock_op(sbi); |
eb47b800 JK |
679 | |
680 | /* When reading holes, we need its node page */ | |
681 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 682 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 683 | if (err) { |
43473f96 CY |
684 | if (flag == F2FS_GET_BLOCK_BMAP) |
685 | map->m_pblk = 0; | |
da85985c | 686 | if (err == -ENOENT) { |
bfad7c2d | 687 | err = 0; |
da85985c CY |
688 | if (map->m_next_pgofs) |
689 | *map->m_next_pgofs = | |
690 | get_next_page_offset(&dn, pgofs); | |
691 | } | |
bfad7c2d | 692 | goto unlock_out; |
848753aa | 693 | } |
973163fc | 694 | |
46008c6d CY |
695 | prealloc = 0; |
696 | ofs_in_node = dn.ofs_in_node; | |
81ca7350 | 697 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
698 | |
699 | next_block: | |
700 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
701 | ||
702 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 703 | if (create) { |
f9811703 CY |
704 | if (unlikely(f2fs_cp_error(sbi))) { |
705 | err = -EIO; | |
4fe71e88 | 706 | goto sync_out; |
f9811703 | 707 | } |
24b84912 | 708 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
709 | if (blkaddr == NULL_ADDR) { |
710 | prealloc++; | |
711 | last_ofs_in_node = dn.ofs_in_node; | |
712 | } | |
24b84912 JK |
713 | } else { |
714 | err = __allocate_data_block(&dn); | |
46008c6d | 715 | if (!err) { |
6bfc4919 JK |
716 | set_inode_flag(F2FS_I(inode), |
717 | FI_APPEND_WRITE); | |
46008c6d CY |
718 | allocated = true; |
719 | } | |
24b84912 | 720 | } |
973163fc | 721 | if (err) |
4fe71e88 | 722 | goto sync_out; |
973163fc | 723 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 724 | blkaddr = dn.data_blkaddr; |
973163fc | 725 | } else { |
43473f96 CY |
726 | if (flag == F2FS_GET_BLOCK_BMAP) { |
727 | map->m_pblk = 0; | |
728 | goto sync_out; | |
729 | } | |
da85985c CY |
730 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
731 | blkaddr == NULL_ADDR) { | |
732 | if (map->m_next_pgofs) | |
733 | *map->m_next_pgofs = pgofs + 1; | |
734 | } | |
973163fc | 735 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 736 | blkaddr != NEW_ADDR) |
4fe71e88 | 737 | goto sync_out; |
e2b4e2bc | 738 | } |
e2b4e2bc | 739 | } |
eb47b800 | 740 | |
46008c6d CY |
741 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
742 | goto skip; | |
743 | ||
4fe71e88 CY |
744 | if (map->m_len == 0) { |
745 | /* preallocated unwritten block should be mapped for fiemap. */ | |
746 | if (blkaddr == NEW_ADDR) | |
747 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
748 | map->m_flags |= F2FS_MAP_MAPPED; | |
749 | ||
750 | map->m_pblk = blkaddr; | |
751 | map->m_len = 1; | |
752 | } else if ((map->m_pblk != NEW_ADDR && | |
753 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 754 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 755 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
756 | ofs++; |
757 | map->m_len++; | |
758 | } else { | |
759 | goto sync_out; | |
760 | } | |
bfad7c2d | 761 | |
46008c6d | 762 | skip: |
bfad7c2d JK |
763 | dn.ofs_in_node++; |
764 | pgofs++; | |
765 | ||
46008c6d CY |
766 | /* preallocate blocks in batch for one dnode page */ |
767 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
768 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 769 | |
46008c6d CY |
770 | dn.ofs_in_node = ofs_in_node; |
771 | err = reserve_new_blocks(&dn, prealloc); | |
772 | if (err) | |
773 | goto sync_out; | |
bfad7c2d | 774 | |
46008c6d CY |
775 | map->m_len += dn.ofs_in_node - ofs_in_node; |
776 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
777 | err = -ENOSPC; | |
778 | goto sync_out; | |
3104af35 | 779 | } |
46008c6d CY |
780 | dn.ofs_in_node = end_offset; |
781 | } | |
782 | ||
783 | if (pgofs >= end) | |
784 | goto sync_out; | |
785 | else if (dn.ofs_in_node < end_offset) | |
786 | goto next_block; | |
787 | ||
788 | if (allocated) | |
789 | sync_inode_page(&dn); | |
790 | f2fs_put_dnode(&dn); | |
791 | ||
792 | if (create) { | |
793 | f2fs_unlock_op(sbi); | |
794 | f2fs_balance_fs(sbi, allocated); | |
eb47b800 | 795 | } |
46008c6d CY |
796 | allocated = false; |
797 | goto next_dnode; | |
7df3a431 | 798 | |
bfad7c2d JK |
799 | sync_out: |
800 | if (allocated) | |
801 | sync_inode_page(&dn); | |
eb47b800 | 802 | f2fs_put_dnode(&dn); |
bfad7c2d | 803 | unlock_out: |
2a340760 | 804 | if (create) { |
3104af35 | 805 | f2fs_unlock_op(sbi); |
3c082b7b | 806 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 807 | } |
bfad7c2d | 808 | out: |
003a3e1d | 809 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 810 | return err; |
eb47b800 JK |
811 | } |
812 | ||
003a3e1d | 813 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
814 | struct buffer_head *bh, int create, int flag, |
815 | pgoff_t *next_pgofs) | |
003a3e1d JK |
816 | { |
817 | struct f2fs_map_blocks map; | |
818 | int ret; | |
819 | ||
820 | map.m_lblk = iblock; | |
821 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 822 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 823 | |
e2b4e2bc | 824 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
825 | if (!ret) { |
826 | map_bh(bh, inode->i_sb, map.m_pblk); | |
827 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
828 | bh->b_size = map.m_len << inode->i_blkbits; | |
829 | } | |
830 | return ret; | |
831 | } | |
832 | ||
ccfb3000 | 833 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
834 | struct buffer_head *bh_result, int create, int flag, |
835 | pgoff_t *next_pgofs) | |
e2b4e2bc | 836 | { |
da85985c CY |
837 | return __get_data_block(inode, iblock, bh_result, create, |
838 | flag, next_pgofs); | |
e2b4e2bc CY |
839 | } |
840 | ||
841 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
842 | struct buffer_head *bh_result, int create) |
843 | { | |
e2b4e2bc | 844 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 845 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
846 | } |
847 | ||
e2b4e2bc | 848 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
849 | struct buffer_head *bh_result, int create) |
850 | { | |
179448bf | 851 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 852 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
853 | return -EFBIG; |
854 | ||
e2b4e2bc | 855 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 856 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
857 | } |
858 | ||
7f63eb77 JK |
859 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
860 | { | |
861 | return (offset >> inode->i_blkbits); | |
862 | } | |
863 | ||
864 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
865 | { | |
866 | return (blk << inode->i_blkbits); | |
867 | } | |
868 | ||
9ab70134 JK |
869 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
870 | u64 start, u64 len) | |
871 | { | |
7f63eb77 JK |
872 | struct buffer_head map_bh; |
873 | sector_t start_blk, last_blk; | |
da85985c | 874 | pgoff_t next_pgofs; |
de1475cc | 875 | loff_t isize; |
7f63eb77 JK |
876 | u64 logical = 0, phys = 0, size = 0; |
877 | u32 flags = 0; | |
7f63eb77 JK |
878 | int ret = 0; |
879 | ||
880 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
881 | if (ret) | |
882 | return ret; | |
883 | ||
67f8cf3c JK |
884 | if (f2fs_has_inline_data(inode)) { |
885 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
886 | if (ret != -EAGAIN) | |
887 | return ret; | |
888 | } | |
889 | ||
5955102c | 890 | inode_lock(inode); |
de1475cc FL |
891 | |
892 | isize = i_size_read(inode); | |
9a950d52 FL |
893 | if (start >= isize) |
894 | goto out; | |
7f63eb77 | 895 | |
9a950d52 FL |
896 | if (start + len > isize) |
897 | len = isize - start; | |
7f63eb77 JK |
898 | |
899 | if (logical_to_blk(inode, len) == 0) | |
900 | len = blk_to_logical(inode, 1); | |
901 | ||
902 | start_blk = logical_to_blk(inode, start); | |
903 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 904 | |
7f63eb77 JK |
905 | next: |
906 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
907 | map_bh.b_size = len; | |
908 | ||
e2b4e2bc | 909 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 910 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
911 | if (ret) |
912 | goto out; | |
913 | ||
914 | /* HOLE */ | |
915 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 916 | start_blk = next_pgofs; |
9a950d52 | 917 | /* Go through holes util pass the EOF */ |
da85985c | 918 | if (blk_to_logical(inode, start_blk) < isize) |
9a950d52 FL |
919 | goto prep_next; |
920 | /* Found a hole beyond isize means no more extents. | |
921 | * Note that the premise is that filesystems don't | |
922 | * punch holes beyond isize and keep size unchanged. | |
923 | */ | |
924 | flags |= FIEMAP_EXTENT_LAST; | |
925 | } | |
7f63eb77 | 926 | |
da5af127 CY |
927 | if (size) { |
928 | if (f2fs_encrypted_inode(inode)) | |
929 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
930 | ||
9a950d52 FL |
931 | ret = fiemap_fill_next_extent(fieinfo, logical, |
932 | phys, size, flags); | |
da5af127 | 933 | } |
7f63eb77 | 934 | |
9a950d52 FL |
935 | if (start_blk > last_blk || ret) |
936 | goto out; | |
7f63eb77 | 937 | |
9a950d52 FL |
938 | logical = blk_to_logical(inode, start_blk); |
939 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
940 | size = map_bh.b_size; | |
941 | flags = 0; | |
942 | if (buffer_unwritten(&map_bh)) | |
943 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 944 | |
9a950d52 | 945 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 946 | |
9a950d52 | 947 | prep_next: |
7f63eb77 JK |
948 | cond_resched(); |
949 | if (fatal_signal_pending(current)) | |
950 | ret = -EINTR; | |
951 | else | |
952 | goto next; | |
953 | out: | |
954 | if (ret == 1) | |
955 | ret = 0; | |
956 | ||
5955102c | 957 | inode_unlock(inode); |
7f63eb77 | 958 | return ret; |
9ab70134 JK |
959 | } |
960 | ||
f1e88660 JK |
961 | /* |
962 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
963 | * Major change was from block_size == page_size in f2fs by default. | |
964 | */ | |
965 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
966 | struct list_head *pages, struct page *page, | |
967 | unsigned nr_pages) | |
968 | { | |
969 | struct bio *bio = NULL; | |
970 | unsigned page_idx; | |
971 | sector_t last_block_in_bio = 0; | |
972 | struct inode *inode = mapping->host; | |
973 | const unsigned blkbits = inode->i_blkbits; | |
974 | const unsigned blocksize = 1 << blkbits; | |
975 | sector_t block_in_file; | |
976 | sector_t last_block; | |
977 | sector_t last_block_in_file; | |
978 | sector_t block_nr; | |
979 | struct block_device *bdev = inode->i_sb->s_bdev; | |
980 | struct f2fs_map_blocks map; | |
981 | ||
982 | map.m_pblk = 0; | |
983 | map.m_lblk = 0; | |
984 | map.m_len = 0; | |
985 | map.m_flags = 0; | |
da85985c | 986 | map.m_next_pgofs = NULL; |
f1e88660 JK |
987 | |
988 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
989 | ||
990 | prefetchw(&page->flags); | |
991 | if (pages) { | |
992 | page = list_entry(pages->prev, struct page, lru); | |
993 | list_del(&page->lru); | |
994 | if (add_to_page_cache_lru(page, mapping, | |
995 | page->index, GFP_KERNEL)) | |
996 | goto next_page; | |
997 | } | |
998 | ||
999 | block_in_file = (sector_t)page->index; | |
1000 | last_block = block_in_file + nr_pages; | |
1001 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1002 | blkbits; | |
1003 | if (last_block > last_block_in_file) | |
1004 | last_block = last_block_in_file; | |
1005 | ||
1006 | /* | |
1007 | * Map blocks using the previous result first. | |
1008 | */ | |
1009 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1010 | block_in_file > map.m_lblk && | |
1011 | block_in_file < (map.m_lblk + map.m_len)) | |
1012 | goto got_it; | |
1013 | ||
1014 | /* | |
1015 | * Then do more f2fs_map_blocks() calls until we are | |
1016 | * done with this page. | |
1017 | */ | |
1018 | map.m_flags = 0; | |
1019 | ||
1020 | if (block_in_file < last_block) { | |
1021 | map.m_lblk = block_in_file; | |
1022 | map.m_len = last_block - block_in_file; | |
1023 | ||
46c9e141 | 1024 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1025 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1026 | goto set_error_page; |
1027 | } | |
1028 | got_it: | |
1029 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1030 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1031 | SetPageMappedToDisk(page); | |
1032 | ||
1033 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1034 | SetPageUptodate(page); | |
1035 | goto confused; | |
1036 | } | |
1037 | } else { | |
09cbfeaf | 1038 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1039 | SetPageUptodate(page); |
1040 | unlock_page(page); | |
1041 | goto next_page; | |
1042 | } | |
1043 | ||
1044 | /* | |
1045 | * This page will go to BIO. Do we need to send this | |
1046 | * BIO off first? | |
1047 | */ | |
1048 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
1049 | submit_and_realloc: | |
1050 | submit_bio(READ, bio); | |
1051 | bio = NULL; | |
1052 | } | |
1053 | if (bio == NULL) { | |
0b81d077 | 1054 | struct fscrypt_ctx *ctx = NULL; |
4375a336 JK |
1055 | |
1056 | if (f2fs_encrypted_inode(inode) && | |
1057 | S_ISREG(inode->i_mode)) { | |
4375a336 | 1058 | |
b32e4482 | 1059 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); |
4375a336 JK |
1060 | if (IS_ERR(ctx)) |
1061 | goto set_error_page; | |
1062 | ||
1063 | /* wait the page to be moved by cleaning */ | |
08b39fbd CY |
1064 | f2fs_wait_on_encrypted_page_writeback( |
1065 | F2FS_I_SB(inode), block_nr); | |
4375a336 JK |
1066 | } |
1067 | ||
f1e88660 | 1068 | bio = bio_alloc(GFP_KERNEL, |
b54ffb73 | 1069 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
4375a336 JK |
1070 | if (!bio) { |
1071 | if (ctx) | |
0b81d077 | 1072 | fscrypt_release_ctx(ctx); |
f1e88660 | 1073 | goto set_error_page; |
4375a336 | 1074 | } |
f1e88660 JK |
1075 | bio->bi_bdev = bdev; |
1076 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 1077 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 1078 | bio->bi_private = ctx; |
f1e88660 JK |
1079 | } |
1080 | ||
1081 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1082 | goto submit_and_realloc; | |
1083 | ||
1084 | last_block_in_bio = block_nr; | |
1085 | goto next_page; | |
1086 | set_error_page: | |
1087 | SetPageError(page); | |
09cbfeaf | 1088 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1089 | unlock_page(page); |
1090 | goto next_page; | |
1091 | confused: | |
1092 | if (bio) { | |
1093 | submit_bio(READ, bio); | |
1094 | bio = NULL; | |
1095 | } | |
1096 | unlock_page(page); | |
1097 | next_page: | |
1098 | if (pages) | |
09cbfeaf | 1099 | put_page(page); |
f1e88660 JK |
1100 | } |
1101 | BUG_ON(pages && !list_empty(pages)); | |
1102 | if (bio) | |
1103 | submit_bio(READ, bio); | |
1104 | return 0; | |
1105 | } | |
1106 | ||
eb47b800 JK |
1107 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1108 | { | |
9ffe0fb5 | 1109 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1110 | int ret = -EAGAIN; |
9ffe0fb5 | 1111 | |
c20e89cd CY |
1112 | trace_f2fs_readpage(page, DATA); |
1113 | ||
e1c42045 | 1114 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1115 | if (f2fs_has_inline_data(inode)) |
1116 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1117 | if (ret == -EAGAIN) |
f1e88660 | 1118 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1119 | return ret; |
eb47b800 JK |
1120 | } |
1121 | ||
1122 | static int f2fs_read_data_pages(struct file *file, | |
1123 | struct address_space *mapping, | |
1124 | struct list_head *pages, unsigned nr_pages) | |
1125 | { | |
9ffe0fb5 | 1126 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1127 | struct page *page = list_entry(pages->prev, struct page, lru); |
1128 | ||
1129 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1130 | |
1131 | /* If the file has inline data, skip readpages */ | |
1132 | if (f2fs_has_inline_data(inode)) | |
1133 | return 0; | |
1134 | ||
f1e88660 | 1135 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1136 | } |
1137 | ||
05ca3632 | 1138 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1139 | { |
05ca3632 | 1140 | struct page *page = fio->page; |
eb47b800 | 1141 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1142 | struct dnode_of_data dn; |
1143 | int err = 0; | |
1144 | ||
1145 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1146 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1147 | if (err) |
1148 | return err; | |
1149 | ||
28bc106b | 1150 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1151 | |
1152 | /* This page is already truncated */ | |
7a9d7548 | 1153 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1154 | ClearPageUptodate(page); |
eb47b800 | 1155 | goto out_writepage; |
2bca1e23 | 1156 | } |
eb47b800 | 1157 | |
4375a336 | 1158 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1159 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1160 | |
1161 | /* wait for GCed encrypted page writeback */ | |
1162 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1163 | fio->old_blkaddr); |
b32e4482 JK |
1164 | retry_encrypt: |
1165 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1166 | gfp_flags); | |
4375a336 JK |
1167 | if (IS_ERR(fio->encrypted_page)) { |
1168 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1169 | if (err == -ENOMEM) { |
1170 | /* flush pending ios and wait for a while */ | |
1171 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1172 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1173 | gfp_flags |= __GFP_NOFAIL; | |
1174 | err = 0; | |
1175 | goto retry_encrypt; | |
1176 | } | |
4375a336 JK |
1177 | goto out_writepage; |
1178 | } | |
1179 | } | |
1180 | ||
eb47b800 JK |
1181 | set_page_writeback(page); |
1182 | ||
1183 | /* | |
1184 | * If current allocation needs SSR, | |
1185 | * it had better in-place writes for updated data. | |
1186 | */ | |
7a9d7548 | 1187 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1188 | !is_cold_data(page) && |
2da3e027 | 1189 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1190 | need_inplace_update(inode))) { |
05ca3632 | 1191 | rewrite_data_page(fio); |
fff04f90 | 1192 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1193 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1194 | } else { |
05ca3632 | 1195 | write_data_page(&dn, fio); |
8ce67cb0 | 1196 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1197 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1198 | if (page->index == 0) |
1199 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1200 | } |
1201 | out_writepage: | |
1202 | f2fs_put_dnode(&dn); | |
1203 | return err; | |
1204 | } | |
1205 | ||
1206 | static int f2fs_write_data_page(struct page *page, | |
1207 | struct writeback_control *wbc) | |
1208 | { | |
1209 | struct inode *inode = page->mapping->host; | |
4081363f | 1210 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1211 | loff_t i_size = i_size_read(inode); |
1212 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1213 | >> PAGE_SHIFT; |
9ffe0fb5 | 1214 | unsigned offset = 0; |
39936837 | 1215 | bool need_balance_fs = false; |
eb47b800 | 1216 | int err = 0; |
458e6197 | 1217 | struct f2fs_io_info fio = { |
05ca3632 | 1218 | .sbi = sbi, |
458e6197 | 1219 | .type = DATA, |
6c311ec6 | 1220 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1221 | .page = page, |
4375a336 | 1222 | .encrypted_page = NULL, |
458e6197 | 1223 | }; |
eb47b800 | 1224 | |
ecda0de3 CY |
1225 | trace_f2fs_writepage(page, DATA); |
1226 | ||
eb47b800 | 1227 | if (page->index < end_index) |
39936837 | 1228 | goto write; |
eb47b800 JK |
1229 | |
1230 | /* | |
1231 | * If the offset is out-of-range of file size, | |
1232 | * this page does not have to be written to disk. | |
1233 | */ | |
09cbfeaf | 1234 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1235 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1236 | goto out; |
eb47b800 | 1237 | |
09cbfeaf | 1238 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1239 | write: |
caf0047e | 1240 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1241 | goto redirty_out; |
1e84371f JK |
1242 | if (f2fs_is_drop_cache(inode)) |
1243 | goto out; | |
e6e5f561 JK |
1244 | /* we should not write 0'th page having journal header */ |
1245 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1246 | (!wbc->for_reclaim && | |
1247 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1248 | goto redirty_out; |
eb47b800 | 1249 | |
39936837 | 1250 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1251 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1252 | if (unlikely(f2fs_cp_error(sbi))) |
1253 | goto redirty_out; | |
05ca3632 | 1254 | err = do_write_data_page(&fio); |
8618b881 JK |
1255 | goto done; |
1256 | } | |
9ffe0fb5 | 1257 | |
cf779cab JK |
1258 | /* we should bypass data pages to proceed the kworkder jobs */ |
1259 | if (unlikely(f2fs_cp_error(sbi))) { | |
1260 | SetPageError(page); | |
a7ffdbe2 | 1261 | goto out; |
cf779cab JK |
1262 | } |
1263 | ||
8618b881 | 1264 | if (!wbc->for_reclaim) |
39936837 | 1265 | need_balance_fs = true; |
8618b881 | 1266 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1267 | goto redirty_out; |
eb47b800 | 1268 | |
b3d208f9 | 1269 | err = -EAGAIN; |
8618b881 | 1270 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1271 | if (f2fs_has_inline_data(inode)) |
1272 | err = f2fs_write_inline_data(inode, page); | |
1273 | if (err == -EAGAIN) | |
05ca3632 | 1274 | err = do_write_data_page(&fio); |
8618b881 JK |
1275 | f2fs_unlock_op(sbi); |
1276 | done: | |
1277 | if (err && err != -ENOENT) | |
1278 | goto redirty_out; | |
eb47b800 | 1279 | |
eb47b800 | 1280 | clear_cold_data(page); |
39936837 | 1281 | out: |
a7ffdbe2 | 1282 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1283 | if (err) |
1284 | ClearPageUptodate(page); | |
0c3a5797 CY |
1285 | |
1286 | if (wbc->for_reclaim) { | |
1287 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1288 | remove_dirty_inode(inode); | |
1289 | } | |
1290 | ||
eb47b800 | 1291 | unlock_page(page); |
2c4db1a6 | 1292 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1293 | |
1294 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1295 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1296 | |
eb47b800 JK |
1297 | return 0; |
1298 | ||
eb47b800 | 1299 | redirty_out: |
76f60268 | 1300 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1301 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1302 | } |
1303 | ||
fa9150a8 NJ |
1304 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1305 | void *data) | |
1306 | { | |
1307 | struct address_space *mapping = data; | |
1308 | int ret = mapping->a_ops->writepage(page, wbc); | |
1309 | mapping_set_error(mapping, ret); | |
1310 | return ret; | |
1311 | } | |
1312 | ||
8f46dcae CY |
1313 | /* |
1314 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1315 | * The major change is making write step of cold data page separately from | |
1316 | * warm/hot data page. | |
1317 | */ | |
1318 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1319 | struct writeback_control *wbc, writepage_t writepage, | |
1320 | void *data) | |
1321 | { | |
1322 | int ret = 0; | |
1323 | int done = 0; | |
1324 | struct pagevec pvec; | |
1325 | int nr_pages; | |
1326 | pgoff_t uninitialized_var(writeback_index); | |
1327 | pgoff_t index; | |
1328 | pgoff_t end; /* Inclusive */ | |
1329 | pgoff_t done_index; | |
1330 | int cycled; | |
1331 | int range_whole = 0; | |
1332 | int tag; | |
1333 | int step = 0; | |
1334 | ||
1335 | pagevec_init(&pvec, 0); | |
1336 | next: | |
1337 | if (wbc->range_cyclic) { | |
1338 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1339 | index = writeback_index; | |
1340 | if (index == 0) | |
1341 | cycled = 1; | |
1342 | else | |
1343 | cycled = 0; | |
1344 | end = -1; | |
1345 | } else { | |
09cbfeaf KS |
1346 | index = wbc->range_start >> PAGE_SHIFT; |
1347 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1348 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1349 | range_whole = 1; | |
1350 | cycled = 1; /* ignore range_cyclic tests */ | |
1351 | } | |
1352 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1353 | tag = PAGECACHE_TAG_TOWRITE; | |
1354 | else | |
1355 | tag = PAGECACHE_TAG_DIRTY; | |
1356 | retry: | |
1357 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1358 | tag_pages_for_writeback(mapping, index, end); | |
1359 | done_index = index; | |
1360 | while (!done && (index <= end)) { | |
1361 | int i; | |
1362 | ||
1363 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1364 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1365 | if (nr_pages == 0) | |
1366 | break; | |
1367 | ||
1368 | for (i = 0; i < nr_pages; i++) { | |
1369 | struct page *page = pvec.pages[i]; | |
1370 | ||
1371 | if (page->index > end) { | |
1372 | done = 1; | |
1373 | break; | |
1374 | } | |
1375 | ||
1376 | done_index = page->index; | |
1377 | ||
1378 | lock_page(page); | |
1379 | ||
1380 | if (unlikely(page->mapping != mapping)) { | |
1381 | continue_unlock: | |
1382 | unlock_page(page); | |
1383 | continue; | |
1384 | } | |
1385 | ||
1386 | if (!PageDirty(page)) { | |
1387 | /* someone wrote it for us */ | |
1388 | goto continue_unlock; | |
1389 | } | |
1390 | ||
737f1899 | 1391 | if (step == is_cold_data(page)) |
8f46dcae CY |
1392 | goto continue_unlock; |
1393 | ||
1394 | if (PageWriteback(page)) { | |
1395 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1396 | f2fs_wait_on_page_writeback(page, |
1397 | DATA, true); | |
8f46dcae CY |
1398 | else |
1399 | goto continue_unlock; | |
1400 | } | |
1401 | ||
1402 | BUG_ON(PageWriteback(page)); | |
1403 | if (!clear_page_dirty_for_io(page)) | |
1404 | goto continue_unlock; | |
1405 | ||
1406 | ret = (*writepage)(page, wbc, data); | |
1407 | if (unlikely(ret)) { | |
1408 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1409 | unlock_page(page); | |
1410 | ret = 0; | |
1411 | } else { | |
1412 | done_index = page->index + 1; | |
1413 | done = 1; | |
1414 | break; | |
1415 | } | |
1416 | } | |
1417 | ||
1418 | if (--wbc->nr_to_write <= 0 && | |
1419 | wbc->sync_mode == WB_SYNC_NONE) { | |
1420 | done = 1; | |
1421 | break; | |
1422 | } | |
1423 | } | |
1424 | pagevec_release(&pvec); | |
1425 | cond_resched(); | |
1426 | } | |
1427 | ||
1428 | if (step < 1) { | |
1429 | step++; | |
1430 | goto next; | |
1431 | } | |
1432 | ||
1433 | if (!cycled && !done) { | |
1434 | cycled = 1; | |
1435 | index = 0; | |
1436 | end = writeback_index - 1; | |
1437 | goto retry; | |
1438 | } | |
1439 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1440 | mapping->writeback_index = done_index; | |
1441 | ||
1442 | return ret; | |
1443 | } | |
1444 | ||
25ca923b | 1445 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1446 | struct writeback_control *wbc) |
1447 | { | |
1448 | struct inode *inode = mapping->host; | |
4081363f | 1449 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1450 | bool locked = false; |
eb47b800 | 1451 | int ret; |
50c8cdb3 | 1452 | long diff; |
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 CY |
1467 | /* skip writing during file defragment */ |
1468 | if (is_inode_flag_set(F2FS_I(inode), FI_DO_DEFRAG)) | |
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 | ||
50c8cdb3 | 1477 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1478 | |
25c13551 | 1479 | if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) { |
5463e7c1 JK |
1480 | mutex_lock(&sbi->writepages); |
1481 | locked = true; | |
1482 | } | |
8f46dcae | 1483 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
0c3a5797 | 1484 | f2fs_submit_merged_bio_cond(sbi, inode, NULL, 0, DATA, WRITE); |
5463e7c1 JK |
1485 | if (locked) |
1486 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1487 | |
c227f912 | 1488 | remove_dirty_inode(inode); |
eb47b800 | 1489 | |
50c8cdb3 | 1490 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1491 | return ret; |
d3baf95d JK |
1492 | |
1493 | skip_write: | |
a7ffdbe2 | 1494 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1495 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1496 | return 0; |
eb47b800 JK |
1497 | } |
1498 | ||
3aab8f82 CY |
1499 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1500 | { | |
1501 | struct inode *inode = mapping->host; | |
819d9153 | 1502 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1503 | |
819d9153 JK |
1504 | if (to > i_size) { |
1505 | truncate_pagecache(inode, i_size); | |
1506 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1507 | } |
1508 | } | |
1509 | ||
2aadac08 JK |
1510 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1511 | struct page *page, loff_t pos, unsigned len, | |
1512 | block_t *blk_addr, bool *node_changed) | |
1513 | { | |
1514 | struct inode *inode = page->mapping->host; | |
1515 | pgoff_t index = page->index; | |
1516 | struct dnode_of_data dn; | |
1517 | struct page *ipage; | |
b4d07a3e JK |
1518 | bool locked = false; |
1519 | struct extent_info ei; | |
2aadac08 JK |
1520 | int err = 0; |
1521 | ||
24b84912 JK |
1522 | /* |
1523 | * we already allocated all the blocks, so we don't need to get | |
1524 | * the block addresses when there is no need to fill the page. | |
1525 | */ | |
1526 | if (!f2fs_has_inline_data(inode) && !f2fs_encrypted_inode(inode) && | |
09cbfeaf | 1527 | len == PAGE_SIZE) |
24b84912 JK |
1528 | return 0; |
1529 | ||
b4d07a3e | 1530 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1531 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1532 | f2fs_lock_op(sbi); |
1533 | locked = true; | |
1534 | } | |
1535 | restart: | |
2aadac08 JK |
1536 | /* check inline_data */ |
1537 | ipage = get_node_page(sbi, inode->i_ino); | |
1538 | if (IS_ERR(ipage)) { | |
1539 | err = PTR_ERR(ipage); | |
1540 | goto unlock_out; | |
1541 | } | |
1542 | ||
1543 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1544 | ||
1545 | if (f2fs_has_inline_data(inode)) { | |
1546 | if (pos + len <= MAX_INLINE_DATA) { | |
1547 | read_inline_data(page, ipage); | |
1548 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
2049d4fc | 1549 | set_inline_node(ipage); |
2aadac08 JK |
1550 | } else { |
1551 | err = f2fs_convert_inline_page(&dn, page); | |
1552 | if (err) | |
b4d07a3e JK |
1553 | goto out; |
1554 | if (dn.data_blkaddr == NULL_ADDR) | |
1555 | err = f2fs_get_block(&dn, index); | |
1556 | } | |
1557 | } else if (locked) { | |
1558 | err = f2fs_get_block(&dn, index); | |
1559 | } else { | |
1560 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1561 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1562 | } else { | |
b4d07a3e JK |
1563 | /* hole case */ |
1564 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1565 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1566 | f2fs_put_dnode(&dn); |
1567 | f2fs_lock_op(sbi); | |
1568 | locked = true; | |
1569 | goto restart; | |
1570 | } | |
2aadac08 JK |
1571 | } |
1572 | } | |
b4d07a3e | 1573 | |
2aadac08 JK |
1574 | /* convert_inline_page can make node_changed */ |
1575 | *blk_addr = dn.data_blkaddr; | |
1576 | *node_changed = dn.node_changed; | |
b4d07a3e | 1577 | out: |
2aadac08 JK |
1578 | f2fs_put_dnode(&dn); |
1579 | unlock_out: | |
b4d07a3e JK |
1580 | if (locked) |
1581 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1582 | return err; |
1583 | } | |
1584 | ||
eb47b800 JK |
1585 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1586 | loff_t pos, unsigned len, unsigned flags, | |
1587 | struct page **pagep, void **fsdata) | |
1588 | { | |
1589 | struct inode *inode = mapping->host; | |
4081363f | 1590 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1591 | struct page *page = NULL; |
09cbfeaf | 1592 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1593 | bool need_balance = false; |
1594 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1595 | int err = 0; |
1596 | ||
62aed044 CY |
1597 | trace_f2fs_write_begin(inode, pos, len, flags); |
1598 | ||
5f727395 JK |
1599 | /* |
1600 | * We should check this at this moment to avoid deadlock on inode page | |
1601 | * and #0 page. The locking rule for inline_data conversion should be: | |
1602 | * lock_page(page #0) -> lock_page(inode_page) | |
1603 | */ | |
1604 | if (index != 0) { | |
1605 | err = f2fs_convert_inline_inode(inode); | |
1606 | if (err) | |
1607 | goto fail; | |
1608 | } | |
afcb7ca0 | 1609 | repeat: |
eb47b800 | 1610 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1611 | if (!page) { |
1612 | err = -ENOMEM; | |
1613 | goto fail; | |
1614 | } | |
d5f66990 | 1615 | |
eb47b800 JK |
1616 | *pagep = page; |
1617 | ||
2aadac08 JK |
1618 | err = prepare_write_begin(sbi, page, pos, len, |
1619 | &blkaddr, &need_balance); | |
9ba69cf9 | 1620 | if (err) |
2aadac08 | 1621 | goto fail; |
9ba69cf9 | 1622 | |
2aadac08 | 1623 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 | 1624 | unlock_page(page); |
2c4db1a6 | 1625 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1626 | lock_page(page); |
1627 | if (page->mapping != mapping) { | |
1628 | /* The page got truncated from under us */ | |
1629 | f2fs_put_page(page, 1); | |
1630 | goto repeat; | |
1631 | } | |
1632 | } | |
1633 | ||
fec1d657 | 1634 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1635 | |
08b39fbd CY |
1636 | /* wait for GCed encrypted page writeback */ |
1637 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1638 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1639 | |
09cbfeaf | 1640 | if (len == PAGE_SIZE) |
90d4388a CY |
1641 | goto out_update; |
1642 | if (PageUptodate(page)) | |
1643 | goto out_clear; | |
eb47b800 | 1644 | |
09cbfeaf KS |
1645 | if ((pos & PAGE_MASK) >= i_size_read(inode)) { |
1646 | unsigned start = pos & (PAGE_SIZE - 1); | |
eb47b800 JK |
1647 | unsigned end = start + len; |
1648 | ||
1649 | /* Reading beyond i_size is simple: memset to zero */ | |
09cbfeaf | 1650 | zero_user_segments(page, 0, start, end, PAGE_SIZE); |
90d4388a | 1651 | goto out_update; |
eb47b800 JK |
1652 | } |
1653 | ||
2aadac08 | 1654 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1655 | zero_user_segment(page, 0, PAGE_SIZE); |
eb47b800 | 1656 | } else { |
cf04e8eb | 1657 | struct f2fs_io_info fio = { |
05ca3632 | 1658 | .sbi = sbi, |
cf04e8eb JK |
1659 | .type = DATA, |
1660 | .rw = READ_SYNC, | |
7a9d7548 CY |
1661 | .old_blkaddr = blkaddr, |
1662 | .new_blkaddr = blkaddr, | |
05ca3632 | 1663 | .page = page, |
4375a336 | 1664 | .encrypted_page = NULL, |
cf04e8eb | 1665 | }; |
05ca3632 | 1666 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1667 | if (err) |
1668 | goto fail; | |
d54c795b | 1669 | |
393ff91f | 1670 | lock_page(page); |
6bacf52f | 1671 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1672 | err = -EIO; |
1673 | goto fail; | |
eb47b800 | 1674 | } |
6bacf52f | 1675 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1676 | f2fs_put_page(page, 1); |
1677 | goto repeat; | |
eb47b800 | 1678 | } |
4375a336 JK |
1679 | |
1680 | /* avoid symlink page */ | |
1681 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
0b81d077 | 1682 | err = fscrypt_decrypt_page(page); |
86531d6b | 1683 | if (err) |
4375a336 | 1684 | goto fail; |
4375a336 | 1685 | } |
eb47b800 | 1686 | } |
90d4388a | 1687 | out_update: |
eb47b800 | 1688 | SetPageUptodate(page); |
90d4388a | 1689 | out_clear: |
eb47b800 JK |
1690 | clear_cold_data(page); |
1691 | return 0; | |
9ba69cf9 | 1692 | |
3aab8f82 | 1693 | fail: |
86531d6b | 1694 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1695 | f2fs_write_failed(mapping, pos + len); |
1696 | return err; | |
eb47b800 JK |
1697 | } |
1698 | ||
a1dd3c13 JK |
1699 | static int f2fs_write_end(struct file *file, |
1700 | struct address_space *mapping, | |
1701 | loff_t pos, unsigned len, unsigned copied, | |
1702 | struct page *page, void *fsdata) | |
1703 | { | |
1704 | struct inode *inode = page->mapping->host; | |
1705 | ||
dfb2bf38 CY |
1706 | trace_f2fs_write_end(inode, pos, len, copied); |
1707 | ||
34ba94ba | 1708 | set_page_dirty(page); |
a1dd3c13 JK |
1709 | |
1710 | if (pos + copied > i_size_read(inode)) { | |
1711 | i_size_write(inode, pos + copied); | |
1712 | mark_inode_dirty(inode); | |
a1dd3c13 JK |
1713 | } |
1714 | ||
75c3c8bc | 1715 | f2fs_put_page(page, 1); |
d0239e1b | 1716 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1717 | return copied; |
1718 | } | |
1719 | ||
6f673763 OS |
1720 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1721 | loff_t offset) | |
944fcfc1 JK |
1722 | { |
1723 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1724 | |
944fcfc1 JK |
1725 | if (offset & blocksize_mask) |
1726 | return -EINVAL; | |
1727 | ||
5b46f25d AV |
1728 | if (iov_iter_alignment(iter) & blocksize_mask) |
1729 | return -EINVAL; | |
1730 | ||
944fcfc1 JK |
1731 | return 0; |
1732 | } | |
1733 | ||
22c6186e OS |
1734 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
1735 | loff_t offset) | |
eb47b800 | 1736 | { |
b439b103 | 1737 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1738 | struct inode *inode = mapping->host; |
1739 | size_t count = iov_iter_count(iter); | |
1740 | int err; | |
944fcfc1 | 1741 | |
b439b103 | 1742 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1743 | if (err) |
1744 | return err; | |
9ffe0fb5 | 1745 | |
fcc85a4d JK |
1746 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1747 | return 0; | |
1748 | ||
6f673763 | 1749 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1750 | |
e2b4e2bc | 1751 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
6bfc4919 JK |
1752 | if (iov_iter_rw(iter) == WRITE) { |
1753 | if (err > 0) | |
1754 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); | |
1755 | else if (err < 0) | |
1756 | f2fs_write_failed(mapping, offset + count); | |
1757 | } | |
70407fad | 1758 | |
6f673763 | 1759 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1760 | |
3aab8f82 | 1761 | return err; |
eb47b800 JK |
1762 | } |
1763 | ||
487261f3 CY |
1764 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1765 | unsigned int length) | |
eb47b800 JK |
1766 | { |
1767 | struct inode *inode = page->mapping->host; | |
487261f3 | 1768 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1769 | |
487261f3 | 1770 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1771 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1772 | return; |
1773 | ||
487261f3 CY |
1774 | if (PageDirty(page)) { |
1775 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1776 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1777 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1778 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1779 | else | |
1780 | inode_dec_dirty_pages(inode); | |
1781 | } | |
decd36b6 CY |
1782 | |
1783 | /* This is atomic written page, keep Private */ | |
1784 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1785 | return; | |
1786 | ||
23dc974e | 1787 | set_page_private(page, 0); |
eb47b800 JK |
1788 | ClearPagePrivate(page); |
1789 | } | |
1790 | ||
487261f3 | 1791 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1792 | { |
f68daeeb JK |
1793 | /* If this is dirty page, keep PagePrivate */ |
1794 | if (PageDirty(page)) | |
1795 | return 0; | |
1796 | ||
decd36b6 CY |
1797 | /* This is atomic written page, keep Private */ |
1798 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1799 | return 0; | |
1800 | ||
23dc974e | 1801 | set_page_private(page, 0); |
eb47b800 | 1802 | ClearPagePrivate(page); |
c3850aa1 | 1803 | return 1; |
eb47b800 JK |
1804 | } |
1805 | ||
1806 | static int f2fs_set_data_page_dirty(struct page *page) | |
1807 | { | |
1808 | struct address_space *mapping = page->mapping; | |
1809 | struct inode *inode = mapping->host; | |
1810 | ||
26c6b887 JK |
1811 | trace_f2fs_set_page_dirty(page, DATA); |
1812 | ||
eb47b800 | 1813 | SetPageUptodate(page); |
34ba94ba | 1814 | |
1e84371f | 1815 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1816 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1817 | register_inmem_page(inode, page); | |
1818 | return 1; | |
1819 | } | |
1820 | /* | |
1821 | * Previously, this page has been registered, we just | |
1822 | * return here. | |
1823 | */ | |
1824 | return 0; | |
34ba94ba JK |
1825 | } |
1826 | ||
eb47b800 JK |
1827 | if (!PageDirty(page)) { |
1828 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1829 | update_dirty_page(inode, page); |
eb47b800 JK |
1830 | return 1; |
1831 | } | |
1832 | return 0; | |
1833 | } | |
1834 | ||
c01e54b7 JK |
1835 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1836 | { | |
454ae7e5 CY |
1837 | struct inode *inode = mapping->host; |
1838 | ||
1d373a0e JK |
1839 | if (f2fs_has_inline_data(inode)) |
1840 | return 0; | |
1841 | ||
1842 | /* make sure allocating whole blocks */ | |
1843 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1844 | filemap_write_and_wait(mapping); | |
1845 | ||
e2b4e2bc | 1846 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1847 | } |
1848 | ||
eb47b800 JK |
1849 | const struct address_space_operations f2fs_dblock_aops = { |
1850 | .readpage = f2fs_read_data_page, | |
1851 | .readpages = f2fs_read_data_pages, | |
1852 | .writepage = f2fs_write_data_page, | |
1853 | .writepages = f2fs_write_data_pages, | |
1854 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1855 | .write_end = f2fs_write_end, |
eb47b800 | 1856 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1857 | .invalidatepage = f2fs_invalidate_page, |
1858 | .releasepage = f2fs_release_page, | |
eb47b800 | 1859 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1860 | .bmap = f2fs_bmap, |
eb47b800 | 1861 | }; |