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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 | |
4246a0b6 | 32 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 33 | { |
f568849e LT |
34 | struct bio_vec *bvec; |
35 | int i; | |
93dfe2ac | 36 | |
4375a336 | 37 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 38 | if (bio->bi_error) { |
0b81d077 | 39 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 40 | } else { |
0b81d077 | 41 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
42 | return; |
43 | } | |
44 | } | |
45 | ||
12377024 CY |
46 | bio_for_each_segment_all(bvec, bio, i) { |
47 | struct page *page = bvec->bv_page; | |
f1e88660 | 48 | |
4246a0b6 | 49 | if (!bio->bi_error) { |
f1e88660 JK |
50 | SetPageUptodate(page); |
51 | } else { | |
52 | ClearPageUptodate(page); | |
53 | SetPageError(page); | |
54 | } | |
55 | unlock_page(page); | |
56 | } | |
f1e88660 JK |
57 | bio_put(bio); |
58 | } | |
59 | ||
4246a0b6 | 60 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 61 | { |
1b1f559f | 62 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
63 | struct bio_vec *bvec; |
64 | int i; | |
93dfe2ac | 65 | |
f568849e | 66 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
67 | struct page *page = bvec->bv_page; |
68 | ||
0b81d077 | 69 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 70 | |
4246a0b6 | 71 | if (unlikely(bio->bi_error)) { |
93dfe2ac | 72 | set_bit(AS_EIO, &page->mapping->flags); |
38f91ca8 | 73 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac JK |
74 | } |
75 | end_page_writeback(page); | |
f568849e | 76 | } |
f5730184 JK |
77 | if (atomic_dec_and_test(&sbi->nr_wb_bios) && |
78 | wq_has_sleeper(&sbi->cp_wait)) | |
93dfe2ac JK |
79 | wake_up(&sbi->cp_wait); |
80 | ||
81 | bio_put(bio); | |
82 | } | |
83 | ||
940a6d34 GZ |
84 | /* |
85 | * Low-level block read/write IO operations. | |
86 | */ | |
87 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
88 | int npages, bool is_read) | |
89 | { | |
90 | struct bio *bio; | |
91 | ||
740432f8 | 92 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
93 | |
94 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 95 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 96 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 97 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
98 | |
99 | return bio; | |
100 | } | |
101 | ||
f5730184 | 102 | static inline void __submit_bio(struct f2fs_sb_info *sbi, int rw, |
19a5f5e2 | 103 | struct bio *bio, enum page_type type) |
f5730184 | 104 | { |
19a5f5e2 | 105 | if (!is_read_io(rw)) { |
f5730184 | 106 | atomic_inc(&sbi->nr_wb_bios); |
52763a4b JK |
107 | if (f2fs_sb_mounted_hmsmr(sbi->sb) && |
108 | current->plug && (type == DATA || type == NODE)) | |
19a5f5e2 JK |
109 | blk_finish_plug(current->plug); |
110 | } | |
f5730184 JK |
111 | submit_bio(rw, bio); |
112 | } | |
113 | ||
458e6197 | 114 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 115 | { |
458e6197 | 116 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
117 | |
118 | if (!io->bio) | |
119 | return; | |
120 | ||
6a8f8ca5 | 121 | if (is_read_io(fio->rw)) |
2ace38e0 | 122 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 123 | else |
2ace38e0 | 124 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 125 | |
19a5f5e2 | 126 | __submit_bio(io->sbi, fio->rw, io->bio, fio->type); |
93dfe2ac JK |
127 | io->bio = NULL; |
128 | } | |
129 | ||
0c3a5797 CY |
130 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
131 | struct page *page, nid_t ino) | |
0fd785eb | 132 | { |
0fd785eb CY |
133 | struct bio_vec *bvec; |
134 | struct page *target; | |
135 | int i; | |
136 | ||
0c3a5797 | 137 | if (!io->bio) |
0fd785eb | 138 | return false; |
0c3a5797 CY |
139 | |
140 | if (!inode && !page && !ino) | |
141 | return true; | |
0fd785eb CY |
142 | |
143 | bio_for_each_segment_all(bvec, io->bio, i) { | |
144 | ||
0b81d077 | 145 | if (bvec->bv_page->mapping) |
0fd785eb | 146 | target = bvec->bv_page; |
0b81d077 JK |
147 | else |
148 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 149 | |
0c3a5797 CY |
150 | if (inode && inode == target->mapping->host) |
151 | return true; | |
152 | if (page && page == target) | |
153 | return true; | |
154 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 155 | return true; |
0fd785eb CY |
156 | } |
157 | ||
0fd785eb CY |
158 | return false; |
159 | } | |
160 | ||
0c3a5797 CY |
161 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
162 | struct page *page, nid_t ino, | |
163 | enum page_type type) | |
164 | { | |
165 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
166 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
167 | bool ret; | |
168 | ||
169 | down_read(&io->io_rwsem); | |
170 | ret = __has_merged_page(io, inode, page, ino); | |
171 | up_read(&io->io_rwsem); | |
172 | return ret; | |
173 | } | |
174 | ||
175 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
176 | struct inode *inode, struct page *page, | |
177 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
178 | { |
179 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
180 | struct f2fs_bio_info *io; | |
181 | ||
182 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
183 | ||
df0f8dc0 | 184 | down_write(&io->io_rwsem); |
458e6197 | 185 | |
0c3a5797 CY |
186 | if (!__has_merged_page(io, inode, page, ino)) |
187 | goto out; | |
188 | ||
458e6197 JK |
189 | /* change META to META_FLUSH in the checkpoint procedure */ |
190 | if (type >= META_FLUSH) { | |
191 | io->fio.type = META_FLUSH; | |
0f7b2abd JK |
192 | if (test_opt(sbi, NOBARRIER)) |
193 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
194 | else | |
195 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; | |
458e6197 JK |
196 | } |
197 | __submit_merged_bio(io); | |
0c3a5797 | 198 | out: |
df0f8dc0 | 199 | up_write(&io->io_rwsem); |
93dfe2ac JK |
200 | } |
201 | ||
0c3a5797 CY |
202 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
203 | int rw) | |
204 | { | |
205 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
206 | } | |
207 | ||
208 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
209 | struct inode *inode, struct page *page, | |
210 | nid_t ino, enum page_type type, int rw) | |
211 | { | |
212 | if (has_merged_page(sbi, inode, page, ino, type)) | |
213 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
214 | } | |
215 | ||
406657dd CY |
216 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
217 | { | |
218 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
219 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
220 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
221 | } | |
222 | ||
93dfe2ac JK |
223 | /* |
224 | * Fill the locked page with data located in the block address. | |
225 | * Return unlocked page. | |
226 | */ | |
05ca3632 | 227 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 228 | { |
93dfe2ac | 229 | struct bio *bio; |
0b81d077 JK |
230 | struct page *page = fio->encrypted_page ? |
231 | fio->encrypted_page : fio->page; | |
93dfe2ac | 232 | |
2ace38e0 | 233 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 234 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
235 | |
236 | /* Allocate a new bio */ | |
7a9d7548 | 237 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->rw)); |
93dfe2ac | 238 | |
09cbfeaf | 239 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 240 | bio_put(bio); |
93dfe2ac JK |
241 | return -EFAULT; |
242 | } | |
243 | ||
19a5f5e2 | 244 | __submit_bio(fio->sbi, fio->rw, bio, fio->type); |
93dfe2ac JK |
245 | return 0; |
246 | } | |
247 | ||
05ca3632 | 248 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 249 | { |
05ca3632 | 250 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 251 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 252 | struct f2fs_bio_info *io; |
940a6d34 | 253 | bool is_read = is_read_io(fio->rw); |
4375a336 | 254 | struct page *bio_page; |
93dfe2ac | 255 | |
940a6d34 | 256 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 257 | |
7a9d7548 CY |
258 | if (fio->old_blkaddr != NEW_ADDR) |
259 | verify_block_addr(sbi, fio->old_blkaddr); | |
260 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 261 | |
df0f8dc0 | 262 | down_write(&io->io_rwsem); |
93dfe2ac | 263 | |
7a9d7548 | 264 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
458e6197 JK |
265 | io->fio.rw != fio->rw)) |
266 | __submit_merged_bio(io); | |
93dfe2ac JK |
267 | alloc_new: |
268 | if (io->bio == NULL) { | |
90a893c7 | 269 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 270 | |
7a9d7548 CY |
271 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
272 | bio_blocks, is_read); | |
458e6197 | 273 | io->fio = *fio; |
93dfe2ac JK |
274 | } |
275 | ||
4375a336 JK |
276 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
277 | ||
09cbfeaf KS |
278 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
279 | PAGE_SIZE) { | |
458e6197 | 280 | __submit_merged_bio(io); |
93dfe2ac JK |
281 | goto alloc_new; |
282 | } | |
283 | ||
7a9d7548 | 284 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 285 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 286 | |
df0f8dc0 | 287 | up_write(&io->io_rwsem); |
05ca3632 | 288 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
289 | } |
290 | ||
46008c6d CY |
291 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
292 | { | |
293 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
294 | __le32 *addr_array; | |
295 | ||
296 | /* Get physical address of data block */ | |
297 | addr_array = blkaddr_in_node(rn); | |
298 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
299 | } | |
300 | ||
0a8165d7 | 301 | /* |
eb47b800 JK |
302 | * Lock ordering for the change of data block address: |
303 | * ->data_page | |
304 | * ->node_page | |
305 | * update block addresses in the node page | |
306 | */ | |
216a620a | 307 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 308 | { |
46008c6d CY |
309 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
310 | __set_data_blkaddr(dn); | |
311 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 312 | dn->node_changed = true; |
eb47b800 JK |
313 | } |
314 | ||
f28b3434 CY |
315 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
316 | { | |
317 | dn->data_blkaddr = blkaddr; | |
318 | set_data_blkaddr(dn); | |
319 | f2fs_update_extent_cache(dn); | |
320 | } | |
321 | ||
46008c6d CY |
322 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
323 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 324 | { |
4081363f | 325 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 326 | |
46008c6d CY |
327 | if (!count) |
328 | return 0; | |
329 | ||
91942321 | 330 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 331 | return -EPERM; |
46008c6d | 332 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
333 | return -ENOSPC; |
334 | ||
46008c6d CY |
335 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
336 | dn->ofs_in_node, count); | |
337 | ||
338 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
339 | ||
340 | for (; count > 0; dn->ofs_in_node++) { | |
341 | block_t blkaddr = | |
342 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
343 | if (blkaddr == NULL_ADDR) { | |
344 | dn->data_blkaddr = NEW_ADDR; | |
345 | __set_data_blkaddr(dn); | |
346 | count--; | |
347 | } | |
348 | } | |
349 | ||
350 | if (set_page_dirty(dn->node_page)) | |
351 | dn->node_changed = true; | |
eb47b800 JK |
352 | return 0; |
353 | } | |
354 | ||
46008c6d CY |
355 | /* Should keep dn->ofs_in_node unchanged */ |
356 | int reserve_new_block(struct dnode_of_data *dn) | |
357 | { | |
358 | unsigned int ofs_in_node = dn->ofs_in_node; | |
359 | int ret; | |
360 | ||
361 | ret = reserve_new_blocks(dn, 1); | |
362 | dn->ofs_in_node = ofs_in_node; | |
363 | return ret; | |
364 | } | |
365 | ||
b600965c HL |
366 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
367 | { | |
368 | bool need_put = dn->inode_page ? false : true; | |
369 | int err; | |
370 | ||
371 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
372 | if (err) | |
373 | return err; | |
a8865372 | 374 | |
b600965c HL |
375 | if (dn->data_blkaddr == NULL_ADDR) |
376 | err = reserve_new_block(dn); | |
a8865372 | 377 | if (err || need_put) |
b600965c HL |
378 | f2fs_put_dnode(dn); |
379 | return err; | |
380 | } | |
381 | ||
759af1c9 | 382 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 383 | { |
028a41e8 | 384 | struct extent_info ei; |
759af1c9 | 385 | struct inode *inode = dn->inode; |
028a41e8 | 386 | |
759af1c9 FL |
387 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
388 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
389 | return 0; | |
429511cd | 390 | } |
028a41e8 | 391 | |
759af1c9 | 392 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
393 | } |
394 | ||
a56c7c6f JK |
395 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
396 | int rw, bool for_write) | |
eb47b800 | 397 | { |
eb47b800 JK |
398 | struct address_space *mapping = inode->i_mapping; |
399 | struct dnode_of_data dn; | |
400 | struct page *page; | |
cb3bc9ee | 401 | struct extent_info ei; |
eb47b800 | 402 | int err; |
cf04e8eb | 403 | struct f2fs_io_info fio = { |
05ca3632 | 404 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 405 | .type = DATA, |
43f3eae1 | 406 | .rw = rw, |
4375a336 | 407 | .encrypted_page = NULL, |
cf04e8eb | 408 | }; |
eb47b800 | 409 | |
4375a336 JK |
410 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
411 | return read_mapping_page(mapping, index, NULL); | |
412 | ||
a56c7c6f | 413 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
414 | if (!page) |
415 | return ERR_PTR(-ENOMEM); | |
416 | ||
cb3bc9ee CY |
417 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
418 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
419 | goto got_it; | |
420 | } | |
421 | ||
eb47b800 | 422 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 423 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
424 | if (err) |
425 | goto put_err; | |
eb47b800 JK |
426 | f2fs_put_dnode(&dn); |
427 | ||
6bacf52f | 428 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
429 | err = -ENOENT; |
430 | goto put_err; | |
650495de | 431 | } |
cb3bc9ee | 432 | got_it: |
43f3eae1 JK |
433 | if (PageUptodate(page)) { |
434 | unlock_page(page); | |
eb47b800 | 435 | return page; |
43f3eae1 | 436 | } |
eb47b800 | 437 | |
d59ff4df JK |
438 | /* |
439 | * A new dentry page is allocated but not able to be written, since its | |
440 | * new inode page couldn't be allocated due to -ENOSPC. | |
441 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
442 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
443 | */ | |
444 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 445 | zero_user_segment(page, 0, PAGE_SIZE); |
d59ff4df | 446 | SetPageUptodate(page); |
43f3eae1 | 447 | unlock_page(page); |
d59ff4df JK |
448 | return page; |
449 | } | |
eb47b800 | 450 | |
7a9d7548 | 451 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
452 | fio.page = page; |
453 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 454 | if (err) |
86531d6b | 455 | goto put_err; |
43f3eae1 | 456 | return page; |
86531d6b JK |
457 | |
458 | put_err: | |
459 | f2fs_put_page(page, 1); | |
460 | return ERR_PTR(err); | |
43f3eae1 JK |
461 | } |
462 | ||
463 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
464 | { | |
465 | struct address_space *mapping = inode->i_mapping; | |
466 | struct page *page; | |
467 | ||
468 | page = find_get_page(mapping, index); | |
469 | if (page && PageUptodate(page)) | |
470 | return page; | |
471 | f2fs_put_page(page, 0); | |
472 | ||
a56c7c6f | 473 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
474 | if (IS_ERR(page)) |
475 | return page; | |
476 | ||
477 | if (PageUptodate(page)) | |
478 | return page; | |
479 | ||
480 | wait_on_page_locked(page); | |
481 | if (unlikely(!PageUptodate(page))) { | |
482 | f2fs_put_page(page, 0); | |
483 | return ERR_PTR(-EIO); | |
484 | } | |
485 | return page; | |
486 | } | |
487 | ||
488 | /* | |
489 | * If it tries to access a hole, return an error. | |
490 | * Because, the callers, functions in dir.c and GC, should be able to know | |
491 | * whether this page exists or not. | |
492 | */ | |
a56c7c6f JK |
493 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
494 | bool for_write) | |
43f3eae1 JK |
495 | { |
496 | struct address_space *mapping = inode->i_mapping; | |
497 | struct page *page; | |
498 | repeat: | |
a56c7c6f | 499 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
500 | if (IS_ERR(page)) |
501 | return page; | |
393ff91f | 502 | |
43f3eae1 | 503 | /* wait for read completion */ |
393ff91f | 504 | lock_page(page); |
6bacf52f | 505 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
506 | f2fs_put_page(page, 1); |
507 | goto repeat; | |
eb47b800 | 508 | } |
1563ac75 CY |
509 | if (unlikely(!PageUptodate(page))) { |
510 | f2fs_put_page(page, 1); | |
511 | return ERR_PTR(-EIO); | |
512 | } | |
eb47b800 JK |
513 | return page; |
514 | } | |
515 | ||
0a8165d7 | 516 | /* |
eb47b800 JK |
517 | * Caller ensures that this data page is never allocated. |
518 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 519 | * |
4f4124d0 CY |
520 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
521 | * f2fs_unlock_op(). | |
470f00e9 CY |
522 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
523 | * ipage should be released by this function. | |
eb47b800 | 524 | */ |
64aa7ed9 | 525 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 526 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 527 | { |
eb47b800 JK |
528 | struct address_space *mapping = inode->i_mapping; |
529 | struct page *page; | |
530 | struct dnode_of_data dn; | |
531 | int err; | |
7612118a | 532 | |
a56c7c6f | 533 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
534 | if (!page) { |
535 | /* | |
536 | * before exiting, we should make sure ipage will be released | |
537 | * if any error occur. | |
538 | */ | |
539 | f2fs_put_page(ipage, 1); | |
01f28610 | 540 | return ERR_PTR(-ENOMEM); |
470f00e9 | 541 | } |
eb47b800 | 542 | |
a8865372 | 543 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 544 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
545 | if (err) { |
546 | f2fs_put_page(page, 1); | |
eb47b800 | 547 | return ERR_PTR(err); |
a8865372 | 548 | } |
01f28610 JK |
549 | if (!ipage) |
550 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
551 | |
552 | if (PageUptodate(page)) | |
01f28610 | 553 | goto got_it; |
eb47b800 JK |
554 | |
555 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 556 | zero_user_segment(page, 0, PAGE_SIZE); |
393ff91f | 557 | SetPageUptodate(page); |
eb47b800 | 558 | } else { |
4375a336 | 559 | f2fs_put_page(page, 1); |
a8865372 | 560 | |
7612118a JK |
561 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
562 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
563 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 564 | if (IS_ERR(page)) |
7612118a | 565 | return page; |
eb47b800 | 566 | } |
01f28610 | 567 | got_it: |
9edcdabf | 568 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 569 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 570 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
571 | return page; |
572 | } | |
573 | ||
bfad7c2d JK |
574 | static int __allocate_data_block(struct dnode_of_data *dn) |
575 | { | |
4081363f | 576 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 577 | struct f2fs_summary sum; |
bfad7c2d | 578 | struct node_info ni; |
38aa0889 | 579 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 580 | pgoff_t fofs; |
46008c6d | 581 | blkcnt_t count = 1; |
bfad7c2d | 582 | |
91942321 | 583 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 584 | return -EPERM; |
df6136ef CY |
585 | |
586 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
587 | if (dn->data_blkaddr == NEW_ADDR) | |
588 | goto alloc; | |
589 | ||
46008c6d | 590 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
591 | return -ENOSPC; |
592 | ||
df6136ef | 593 | alloc: |
bfad7c2d JK |
594 | get_node_info(sbi, dn->nid, &ni); |
595 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
596 | ||
38aa0889 JK |
597 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
598 | seg = CURSEG_DIRECT_IO; | |
599 | ||
df6136ef CY |
600 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
601 | &sum, seg); | |
216a620a | 602 | set_data_blkaddr(dn); |
bfad7c2d | 603 | |
976e4c50 | 604 | /* update i_size */ |
81ca7350 | 605 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 606 | dn->ofs_in_node; |
09cbfeaf | 607 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 608 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 609 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
610 | return 0; |
611 | } | |
612 | ||
b439b103 | 613 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 614 | { |
b439b103 | 615 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 616 | struct f2fs_map_blocks map; |
b439b103 | 617 | ssize_t ret = 0; |
59b802e5 | 618 | |
0080c507 JK |
619 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
620 | map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from)); | |
da85985c | 621 | map.m_next_pgofs = NULL; |
2a340760 | 622 | |
24b84912 JK |
623 | if (f2fs_encrypted_inode(inode)) |
624 | return 0; | |
625 | ||
626 | if (iocb->ki_flags & IOCB_DIRECT) { | |
627 | ret = f2fs_convert_inline_inode(inode); | |
628 | if (ret) | |
629 | return ret; | |
630 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); | |
631 | } | |
632 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
b439b103 JK |
633 | ret = f2fs_convert_inline_inode(inode); |
634 | if (ret) | |
635 | return ret; | |
b439b103 | 636 | } |
24b84912 JK |
637 | if (!f2fs_has_inline_data(inode)) |
638 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
b439b103 | 639 | return ret; |
59b802e5 JK |
640 | } |
641 | ||
0a8165d7 | 642 | /* |
003a3e1d JK |
643 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
644 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
645 | * If original data blocks are allocated, then give them to blockdev. |
646 | * Otherwise, | |
647 | * a. preallocate requested block addresses | |
648 | * b. do not use extent cache for better performance | |
649 | * c. give the block addresses to blockdev | |
eb47b800 | 650 | */ |
d323d005 | 651 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 652 | int create, int flag) |
eb47b800 | 653 | { |
003a3e1d | 654 | unsigned int maxblocks = map->m_len; |
eb47b800 | 655 | struct dnode_of_data dn; |
f9811703 | 656 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 657 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 658 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 659 | int err = 0, ofs = 1; |
46008c6d CY |
660 | unsigned int ofs_in_node, last_ofs_in_node; |
661 | blkcnt_t prealloc; | |
a2e7d1bf | 662 | struct extent_info ei; |
bfad7c2d | 663 | bool allocated = false; |
7df3a431 | 664 | block_t blkaddr; |
eb47b800 | 665 | |
003a3e1d JK |
666 | map->m_len = 0; |
667 | map->m_flags = 0; | |
668 | ||
669 | /* it only supports block size == page size */ | |
670 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 671 | end = pgofs + maxblocks; |
eb47b800 | 672 | |
24b84912 | 673 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
674 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
675 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
676 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 677 | goto out; |
a2e7d1bf | 678 | } |
bfad7c2d | 679 | |
4fe71e88 | 680 | next_dnode: |
59b802e5 | 681 | if (create) |
3104af35 | 682 | f2fs_lock_op(sbi); |
eb47b800 JK |
683 | |
684 | /* When reading holes, we need its node page */ | |
685 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 686 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 687 | if (err) { |
43473f96 CY |
688 | if (flag == F2FS_GET_BLOCK_BMAP) |
689 | map->m_pblk = 0; | |
da85985c | 690 | if (err == -ENOENT) { |
bfad7c2d | 691 | err = 0; |
da85985c CY |
692 | if (map->m_next_pgofs) |
693 | *map->m_next_pgofs = | |
694 | get_next_page_offset(&dn, pgofs); | |
695 | } | |
bfad7c2d | 696 | goto unlock_out; |
848753aa | 697 | } |
973163fc | 698 | |
46008c6d CY |
699 | prealloc = 0; |
700 | ofs_in_node = dn.ofs_in_node; | |
81ca7350 | 701 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
702 | |
703 | next_block: | |
704 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
705 | ||
706 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 707 | if (create) { |
f9811703 CY |
708 | if (unlikely(f2fs_cp_error(sbi))) { |
709 | err = -EIO; | |
4fe71e88 | 710 | goto sync_out; |
f9811703 | 711 | } |
24b84912 | 712 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
713 | if (blkaddr == NULL_ADDR) { |
714 | prealloc++; | |
715 | last_ofs_in_node = dn.ofs_in_node; | |
716 | } | |
24b84912 JK |
717 | } else { |
718 | err = __allocate_data_block(&dn); | |
46008c6d | 719 | if (!err) { |
91942321 | 720 | set_inode_flag(inode, FI_APPEND_WRITE); |
46008c6d CY |
721 | allocated = true; |
722 | } | |
24b84912 | 723 | } |
973163fc | 724 | if (err) |
4fe71e88 | 725 | goto sync_out; |
973163fc | 726 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 727 | blkaddr = dn.data_blkaddr; |
973163fc | 728 | } else { |
43473f96 CY |
729 | if (flag == F2FS_GET_BLOCK_BMAP) { |
730 | map->m_pblk = 0; | |
731 | goto sync_out; | |
732 | } | |
da85985c CY |
733 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
734 | blkaddr == NULL_ADDR) { | |
735 | if (map->m_next_pgofs) | |
736 | *map->m_next_pgofs = pgofs + 1; | |
737 | } | |
973163fc | 738 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 739 | blkaddr != NEW_ADDR) |
4fe71e88 | 740 | goto sync_out; |
e2b4e2bc | 741 | } |
e2b4e2bc | 742 | } |
eb47b800 | 743 | |
46008c6d CY |
744 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
745 | goto skip; | |
746 | ||
4fe71e88 CY |
747 | if (map->m_len == 0) { |
748 | /* preallocated unwritten block should be mapped for fiemap. */ | |
749 | if (blkaddr == NEW_ADDR) | |
750 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
751 | map->m_flags |= F2FS_MAP_MAPPED; | |
752 | ||
753 | map->m_pblk = blkaddr; | |
754 | map->m_len = 1; | |
755 | } else if ((map->m_pblk != NEW_ADDR && | |
756 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 757 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 758 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
759 | ofs++; |
760 | map->m_len++; | |
761 | } else { | |
762 | goto sync_out; | |
763 | } | |
bfad7c2d | 764 | |
46008c6d | 765 | skip: |
bfad7c2d JK |
766 | dn.ofs_in_node++; |
767 | pgofs++; | |
768 | ||
46008c6d CY |
769 | /* preallocate blocks in batch for one dnode page */ |
770 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
771 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 772 | |
46008c6d CY |
773 | dn.ofs_in_node = ofs_in_node; |
774 | err = reserve_new_blocks(&dn, prealloc); | |
775 | if (err) | |
776 | goto sync_out; | |
bfad7c2d | 777 | |
46008c6d CY |
778 | map->m_len += dn.ofs_in_node - ofs_in_node; |
779 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
780 | err = -ENOSPC; | |
781 | goto sync_out; | |
3104af35 | 782 | } |
46008c6d CY |
783 | dn.ofs_in_node = end_offset; |
784 | } | |
785 | ||
786 | if (pgofs >= end) | |
787 | goto sync_out; | |
788 | else if (dn.ofs_in_node < end_offset) | |
789 | goto next_block; | |
790 | ||
46008c6d CY |
791 | f2fs_put_dnode(&dn); |
792 | ||
793 | if (create) { | |
794 | f2fs_unlock_op(sbi); | |
795 | f2fs_balance_fs(sbi, allocated); | |
eb47b800 | 796 | } |
46008c6d CY |
797 | allocated = false; |
798 | goto next_dnode; | |
7df3a431 | 799 | |
bfad7c2d | 800 | sync_out: |
eb47b800 | 801 | f2fs_put_dnode(&dn); |
bfad7c2d | 802 | unlock_out: |
2a340760 | 803 | if (create) { |
3104af35 | 804 | f2fs_unlock_op(sbi); |
3c082b7b | 805 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 806 | } |
bfad7c2d | 807 | out: |
003a3e1d | 808 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 809 | return err; |
eb47b800 JK |
810 | } |
811 | ||
003a3e1d | 812 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
813 | struct buffer_head *bh, int create, int flag, |
814 | pgoff_t *next_pgofs) | |
003a3e1d JK |
815 | { |
816 | struct f2fs_map_blocks map; | |
817 | int ret; | |
818 | ||
819 | map.m_lblk = iblock; | |
820 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 821 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 822 | |
e2b4e2bc | 823 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
824 | if (!ret) { |
825 | map_bh(bh, inode->i_sb, map.m_pblk); | |
826 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
827 | bh->b_size = map.m_len << inode->i_blkbits; | |
828 | } | |
829 | return ret; | |
830 | } | |
831 | ||
ccfb3000 | 832 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
833 | struct buffer_head *bh_result, int create, int flag, |
834 | pgoff_t *next_pgofs) | |
e2b4e2bc | 835 | { |
da85985c CY |
836 | return __get_data_block(inode, iblock, bh_result, create, |
837 | flag, next_pgofs); | |
e2b4e2bc CY |
838 | } |
839 | ||
840 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
841 | struct buffer_head *bh_result, int create) |
842 | { | |
e2b4e2bc | 843 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 844 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
845 | } |
846 | ||
e2b4e2bc | 847 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
848 | struct buffer_head *bh_result, int create) |
849 | { | |
179448bf | 850 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 851 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
852 | return -EFBIG; |
853 | ||
e2b4e2bc | 854 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 855 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
856 | } |
857 | ||
7f63eb77 JK |
858 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
859 | { | |
860 | return (offset >> inode->i_blkbits); | |
861 | } | |
862 | ||
863 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
864 | { | |
865 | return (blk << inode->i_blkbits); | |
866 | } | |
867 | ||
9ab70134 JK |
868 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
869 | u64 start, u64 len) | |
870 | { | |
7f63eb77 JK |
871 | struct buffer_head map_bh; |
872 | sector_t start_blk, last_blk; | |
da85985c | 873 | pgoff_t next_pgofs; |
de1475cc | 874 | loff_t isize; |
7f63eb77 JK |
875 | u64 logical = 0, phys = 0, size = 0; |
876 | u32 flags = 0; | |
7f63eb77 JK |
877 | int ret = 0; |
878 | ||
879 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
880 | if (ret) | |
881 | return ret; | |
882 | ||
67f8cf3c JK |
883 | if (f2fs_has_inline_data(inode)) { |
884 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
885 | if (ret != -EAGAIN) | |
886 | return ret; | |
887 | } | |
888 | ||
5955102c | 889 | inode_lock(inode); |
de1475cc FL |
890 | |
891 | isize = i_size_read(inode); | |
9a950d52 FL |
892 | if (start >= isize) |
893 | goto out; | |
7f63eb77 | 894 | |
9a950d52 FL |
895 | if (start + len > isize) |
896 | len = isize - start; | |
7f63eb77 JK |
897 | |
898 | if (logical_to_blk(inode, len) == 0) | |
899 | len = blk_to_logical(inode, 1); | |
900 | ||
901 | start_blk = logical_to_blk(inode, start); | |
902 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 903 | |
7f63eb77 JK |
904 | next: |
905 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
906 | map_bh.b_size = len; | |
907 | ||
e2b4e2bc | 908 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 909 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
910 | if (ret) |
911 | goto out; | |
912 | ||
913 | /* HOLE */ | |
914 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 915 | start_blk = next_pgofs; |
9a950d52 | 916 | /* Go through holes util pass the EOF */ |
da85985c | 917 | if (blk_to_logical(inode, start_blk) < isize) |
9a950d52 FL |
918 | goto prep_next; |
919 | /* Found a hole beyond isize means no more extents. | |
920 | * Note that the premise is that filesystems don't | |
921 | * punch holes beyond isize and keep size unchanged. | |
922 | */ | |
923 | flags |= FIEMAP_EXTENT_LAST; | |
924 | } | |
7f63eb77 | 925 | |
da5af127 CY |
926 | if (size) { |
927 | if (f2fs_encrypted_inode(inode)) | |
928 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
929 | ||
9a950d52 FL |
930 | ret = fiemap_fill_next_extent(fieinfo, logical, |
931 | phys, size, flags); | |
da5af127 | 932 | } |
7f63eb77 | 933 | |
9a950d52 FL |
934 | if (start_blk > last_blk || ret) |
935 | goto out; | |
7f63eb77 | 936 | |
9a950d52 FL |
937 | logical = blk_to_logical(inode, start_blk); |
938 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
939 | size = map_bh.b_size; | |
940 | flags = 0; | |
941 | if (buffer_unwritten(&map_bh)) | |
942 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 943 | |
9a950d52 | 944 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 945 | |
9a950d52 | 946 | prep_next: |
7f63eb77 JK |
947 | cond_resched(); |
948 | if (fatal_signal_pending(current)) | |
949 | ret = -EINTR; | |
950 | else | |
951 | goto next; | |
952 | out: | |
953 | if (ret == 1) | |
954 | ret = 0; | |
955 | ||
5955102c | 956 | inode_unlock(inode); |
7f63eb77 | 957 | return ret; |
9ab70134 JK |
958 | } |
959 | ||
78682f79 CY |
960 | struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
961 | unsigned nr_pages) | |
962 | { | |
963 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
964 | struct fscrypt_ctx *ctx = NULL; | |
965 | struct block_device *bdev = sbi->sb->s_bdev; | |
966 | struct bio *bio; | |
967 | ||
968 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
969 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
970 | if (IS_ERR(ctx)) | |
971 | return ERR_CAST(ctx); | |
972 | ||
973 | /* wait the page to be moved by cleaning */ | |
974 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
975 | } | |
976 | ||
977 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
978 | if (!bio) { | |
979 | if (ctx) | |
980 | fscrypt_release_ctx(ctx); | |
981 | return ERR_PTR(-ENOMEM); | |
982 | } | |
983 | bio->bi_bdev = bdev; | |
984 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blkaddr); | |
985 | bio->bi_end_io = f2fs_read_end_io; | |
986 | bio->bi_private = ctx; | |
987 | ||
988 | return bio; | |
989 | } | |
990 | ||
f1e88660 JK |
991 | /* |
992 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
993 | * Major change was from block_size == page_size in f2fs by default. | |
994 | */ | |
995 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
996 | struct list_head *pages, struct page *page, | |
997 | unsigned nr_pages) | |
998 | { | |
999 | struct bio *bio = NULL; | |
1000 | unsigned page_idx; | |
1001 | sector_t last_block_in_bio = 0; | |
1002 | struct inode *inode = mapping->host; | |
1003 | const unsigned blkbits = inode->i_blkbits; | |
1004 | const unsigned blocksize = 1 << blkbits; | |
1005 | sector_t block_in_file; | |
1006 | sector_t last_block; | |
1007 | sector_t last_block_in_file; | |
1008 | sector_t block_nr; | |
f1e88660 JK |
1009 | struct f2fs_map_blocks map; |
1010 | ||
1011 | map.m_pblk = 0; | |
1012 | map.m_lblk = 0; | |
1013 | map.m_len = 0; | |
1014 | map.m_flags = 0; | |
da85985c | 1015 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1016 | |
1017 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1018 | ||
1019 | prefetchw(&page->flags); | |
1020 | if (pages) { | |
1021 | page = list_entry(pages->prev, struct page, lru); | |
1022 | list_del(&page->lru); | |
1023 | if (add_to_page_cache_lru(page, mapping, | |
1024 | page->index, GFP_KERNEL)) | |
1025 | goto next_page; | |
1026 | } | |
1027 | ||
1028 | block_in_file = (sector_t)page->index; | |
1029 | last_block = block_in_file + nr_pages; | |
1030 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1031 | blkbits; | |
1032 | if (last_block > last_block_in_file) | |
1033 | last_block = last_block_in_file; | |
1034 | ||
1035 | /* | |
1036 | * Map blocks using the previous result first. | |
1037 | */ | |
1038 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1039 | block_in_file > map.m_lblk && | |
1040 | block_in_file < (map.m_lblk + map.m_len)) | |
1041 | goto got_it; | |
1042 | ||
1043 | /* | |
1044 | * Then do more f2fs_map_blocks() calls until we are | |
1045 | * done with this page. | |
1046 | */ | |
1047 | map.m_flags = 0; | |
1048 | ||
1049 | if (block_in_file < last_block) { | |
1050 | map.m_lblk = block_in_file; | |
1051 | map.m_len = last_block - block_in_file; | |
1052 | ||
46c9e141 | 1053 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1054 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1055 | goto set_error_page; |
1056 | } | |
1057 | got_it: | |
1058 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1059 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1060 | SetPageMappedToDisk(page); | |
1061 | ||
1062 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1063 | SetPageUptodate(page); | |
1064 | goto confused; | |
1065 | } | |
1066 | } else { | |
09cbfeaf | 1067 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1068 | SetPageUptodate(page); |
1069 | unlock_page(page); | |
1070 | goto next_page; | |
1071 | } | |
1072 | ||
1073 | /* | |
1074 | * This page will go to BIO. Do we need to send this | |
1075 | * BIO off first? | |
1076 | */ | |
1077 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
1078 | submit_and_realloc: | |
19a5f5e2 | 1079 | __submit_bio(F2FS_I_SB(inode), READ, bio, DATA); |
f1e88660 JK |
1080 | bio = NULL; |
1081 | } | |
1082 | if (bio == NULL) { | |
78682f79 CY |
1083 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1084 | if (IS_ERR(bio)) | |
f1e88660 | 1085 | goto set_error_page; |
f1e88660 JK |
1086 | } |
1087 | ||
1088 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1089 | goto submit_and_realloc; | |
1090 | ||
1091 | last_block_in_bio = block_nr; | |
1092 | goto next_page; | |
1093 | set_error_page: | |
1094 | SetPageError(page); | |
09cbfeaf | 1095 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1096 | unlock_page(page); |
1097 | goto next_page; | |
1098 | confused: | |
1099 | if (bio) { | |
19a5f5e2 | 1100 | __submit_bio(F2FS_I_SB(inode), READ, bio, DATA); |
f1e88660 JK |
1101 | bio = NULL; |
1102 | } | |
1103 | unlock_page(page); | |
1104 | next_page: | |
1105 | if (pages) | |
09cbfeaf | 1106 | put_page(page); |
f1e88660 JK |
1107 | } |
1108 | BUG_ON(pages && !list_empty(pages)); | |
1109 | if (bio) | |
19a5f5e2 | 1110 | __submit_bio(F2FS_I_SB(inode), READ, bio, DATA); |
f1e88660 JK |
1111 | return 0; |
1112 | } | |
1113 | ||
eb47b800 JK |
1114 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1115 | { | |
9ffe0fb5 | 1116 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1117 | int ret = -EAGAIN; |
9ffe0fb5 | 1118 | |
c20e89cd CY |
1119 | trace_f2fs_readpage(page, DATA); |
1120 | ||
e1c42045 | 1121 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1122 | if (f2fs_has_inline_data(inode)) |
1123 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1124 | if (ret == -EAGAIN) |
f1e88660 | 1125 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1126 | return ret; |
eb47b800 JK |
1127 | } |
1128 | ||
1129 | static int f2fs_read_data_pages(struct file *file, | |
1130 | struct address_space *mapping, | |
1131 | struct list_head *pages, unsigned nr_pages) | |
1132 | { | |
9ffe0fb5 | 1133 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1134 | struct page *page = list_entry(pages->prev, struct page, lru); |
1135 | ||
1136 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1137 | |
1138 | /* If the file has inline data, skip readpages */ | |
1139 | if (f2fs_has_inline_data(inode)) | |
1140 | return 0; | |
1141 | ||
f1e88660 | 1142 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1143 | } |
1144 | ||
05ca3632 | 1145 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1146 | { |
05ca3632 | 1147 | struct page *page = fio->page; |
eb47b800 | 1148 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1149 | struct dnode_of_data dn; |
1150 | int err = 0; | |
1151 | ||
1152 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1153 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1154 | if (err) |
1155 | return err; | |
1156 | ||
28bc106b | 1157 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1158 | |
1159 | /* This page is already truncated */ | |
7a9d7548 | 1160 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1161 | ClearPageUptodate(page); |
eb47b800 | 1162 | goto out_writepage; |
2bca1e23 | 1163 | } |
eb47b800 | 1164 | |
4375a336 | 1165 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1166 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1167 | |
1168 | /* wait for GCed encrypted page writeback */ | |
1169 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1170 | fio->old_blkaddr); |
b32e4482 JK |
1171 | retry_encrypt: |
1172 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1173 | gfp_flags); | |
4375a336 JK |
1174 | if (IS_ERR(fio->encrypted_page)) { |
1175 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1176 | if (err == -ENOMEM) { |
1177 | /* flush pending ios and wait for a while */ | |
1178 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1179 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1180 | gfp_flags |= __GFP_NOFAIL; | |
1181 | err = 0; | |
1182 | goto retry_encrypt; | |
1183 | } | |
4375a336 JK |
1184 | goto out_writepage; |
1185 | } | |
1186 | } | |
1187 | ||
eb47b800 JK |
1188 | set_page_writeback(page); |
1189 | ||
1190 | /* | |
1191 | * If current allocation needs SSR, | |
1192 | * it had better in-place writes for updated data. | |
1193 | */ | |
7a9d7548 | 1194 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1195 | !is_cold_data(page) && |
2da3e027 | 1196 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1197 | need_inplace_update(inode))) { |
05ca3632 | 1198 | rewrite_data_page(fio); |
91942321 | 1199 | set_inode_flag(inode, FI_UPDATE_WRITE); |
8ce67cb0 | 1200 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1201 | } else { |
05ca3632 | 1202 | write_data_page(&dn, fio); |
8ce67cb0 | 1203 | trace_f2fs_do_write_data_page(page, OPU); |
91942321 | 1204 | set_inode_flag(inode, FI_APPEND_WRITE); |
3c6c2beb | 1205 | if (page->index == 0) |
91942321 | 1206 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
eb47b800 JK |
1207 | } |
1208 | out_writepage: | |
1209 | f2fs_put_dnode(&dn); | |
1210 | return err; | |
1211 | } | |
1212 | ||
1213 | static int f2fs_write_data_page(struct page *page, | |
1214 | struct writeback_control *wbc) | |
1215 | { | |
1216 | struct inode *inode = page->mapping->host; | |
4081363f | 1217 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1218 | loff_t i_size = i_size_read(inode); |
1219 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1220 | >> PAGE_SHIFT; |
26de9b11 | 1221 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1222 | unsigned offset = 0; |
39936837 | 1223 | bool need_balance_fs = false; |
eb47b800 | 1224 | int err = 0; |
458e6197 | 1225 | struct f2fs_io_info fio = { |
05ca3632 | 1226 | .sbi = sbi, |
458e6197 | 1227 | .type = DATA, |
6c311ec6 | 1228 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
05ca3632 | 1229 | .page = page, |
4375a336 | 1230 | .encrypted_page = NULL, |
458e6197 | 1231 | }; |
eb47b800 | 1232 | |
ecda0de3 CY |
1233 | trace_f2fs_writepage(page, DATA); |
1234 | ||
eb47b800 | 1235 | if (page->index < end_index) |
39936837 | 1236 | goto write; |
eb47b800 JK |
1237 | |
1238 | /* | |
1239 | * If the offset is out-of-range of file size, | |
1240 | * this page does not have to be written to disk. | |
1241 | */ | |
09cbfeaf | 1242 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1243 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1244 | goto out; |
eb47b800 | 1245 | |
09cbfeaf | 1246 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1247 | write: |
caf0047e | 1248 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1249 | goto redirty_out; |
1e84371f JK |
1250 | if (f2fs_is_drop_cache(inode)) |
1251 | goto out; | |
e6e5f561 JK |
1252 | /* we should not write 0'th page having journal header */ |
1253 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1254 | (!wbc->for_reclaim && | |
1255 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1256 | goto redirty_out; |
eb47b800 | 1257 | |
cf779cab JK |
1258 | /* we should bypass data pages to proceed the kworkder jobs */ |
1259 | if (unlikely(f2fs_cp_error(sbi))) { | |
7f319975 | 1260 | mapping_set_error(page->mapping, -EIO); |
a7ffdbe2 | 1261 | goto out; |
cf779cab JK |
1262 | } |
1263 | ||
b230e6ca JK |
1264 | /* Dentry blocks are controlled by checkpoint */ |
1265 | if (S_ISDIR(inode->i_mode)) { | |
1266 | err = do_write_data_page(&fio); | |
1267 | goto done; | |
1268 | } | |
1269 | ||
8618b881 | 1270 | if (!wbc->for_reclaim) |
39936837 | 1271 | need_balance_fs = true; |
8618b881 | 1272 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1273 | goto redirty_out; |
eb47b800 | 1274 | |
b3d208f9 | 1275 | err = -EAGAIN; |
8618b881 | 1276 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1277 | if (f2fs_has_inline_data(inode)) |
1278 | err = f2fs_write_inline_data(inode, page); | |
1279 | if (err == -EAGAIN) | |
05ca3632 | 1280 | err = do_write_data_page(&fio); |
26de9b11 JK |
1281 | if (F2FS_I(inode)->last_disk_size < psize) |
1282 | F2FS_I(inode)->last_disk_size = psize; | |
8618b881 JK |
1283 | f2fs_unlock_op(sbi); |
1284 | done: | |
1285 | if (err && err != -ENOENT) | |
1286 | goto redirty_out; | |
eb47b800 | 1287 | |
eb47b800 | 1288 | clear_cold_data(page); |
39936837 | 1289 | out: |
a7ffdbe2 | 1290 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1291 | if (err) |
1292 | ClearPageUptodate(page); | |
0c3a5797 CY |
1293 | |
1294 | if (wbc->for_reclaim) { | |
1295 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1296 | remove_dirty_inode(inode); | |
1297 | } | |
1298 | ||
eb47b800 | 1299 | unlock_page(page); |
2c4db1a6 | 1300 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1301 | |
1302 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1303 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1304 | |
eb47b800 JK |
1305 | return 0; |
1306 | ||
eb47b800 | 1307 | redirty_out: |
76f60268 | 1308 | redirty_page_for_writepage(wbc, page); |
b230e6ca JK |
1309 | unlock_page(page); |
1310 | return err; | |
fa9150a8 NJ |
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, | |
b230e6ca | 1319 | struct writeback_control *wbc) |
8f46dcae CY |
1320 | { |
1321 | int ret = 0; | |
1322 | int done = 0; | |
1323 | struct pagevec pvec; | |
1324 | int nr_pages; | |
1325 | pgoff_t uninitialized_var(writeback_index); | |
1326 | pgoff_t index; | |
1327 | pgoff_t end; /* Inclusive */ | |
1328 | pgoff_t done_index; | |
1329 | int cycled; | |
1330 | int range_whole = 0; | |
1331 | int tag; | |
8f46dcae CY |
1332 | |
1333 | pagevec_init(&pvec, 0); | |
46ae957f | 1334 | |
8f46dcae CY |
1335 | if (wbc->range_cyclic) { |
1336 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1337 | index = writeback_index; | |
1338 | if (index == 0) | |
1339 | cycled = 1; | |
1340 | else | |
1341 | cycled = 0; | |
1342 | end = -1; | |
1343 | } else { | |
09cbfeaf KS |
1344 | index = wbc->range_start >> PAGE_SHIFT; |
1345 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1346 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1347 | range_whole = 1; | |
1348 | cycled = 1; /* ignore range_cyclic tests */ | |
1349 | } | |
1350 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1351 | tag = PAGECACHE_TAG_TOWRITE; | |
1352 | else | |
1353 | tag = PAGECACHE_TAG_DIRTY; | |
1354 | retry: | |
1355 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1356 | tag_pages_for_writeback(mapping, index, end); | |
1357 | done_index = index; | |
1358 | while (!done && (index <= end)) { | |
1359 | int i; | |
1360 | ||
1361 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1362 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1363 | if (nr_pages == 0) | |
1364 | break; | |
1365 | ||
1366 | for (i = 0; i < nr_pages; i++) { | |
1367 | struct page *page = pvec.pages[i]; | |
1368 | ||
1369 | if (page->index > end) { | |
1370 | done = 1; | |
1371 | break; | |
1372 | } | |
1373 | ||
1374 | done_index = page->index; | |
1375 | ||
1376 | lock_page(page); | |
1377 | ||
1378 | if (unlikely(page->mapping != mapping)) { | |
1379 | continue_unlock: | |
1380 | unlock_page(page); | |
1381 | continue; | |
1382 | } | |
1383 | ||
1384 | if (!PageDirty(page)) { | |
1385 | /* someone wrote it for us */ | |
1386 | goto continue_unlock; | |
1387 | } | |
1388 | ||
8f46dcae CY |
1389 | if (PageWriteback(page)) { |
1390 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1391 | f2fs_wait_on_page_writeback(page, |
1392 | DATA, true); | |
8f46dcae CY |
1393 | else |
1394 | goto continue_unlock; | |
1395 | } | |
1396 | ||
1397 | BUG_ON(PageWriteback(page)); | |
1398 | if (!clear_page_dirty_for_io(page)) | |
1399 | goto continue_unlock; | |
1400 | ||
b230e6ca | 1401 | ret = mapping->a_ops->writepage(page, wbc); |
8f46dcae | 1402 | if (unlikely(ret)) { |
b230e6ca JK |
1403 | done_index = page->index + 1; |
1404 | done = 1; | |
1405 | break; | |
8f46dcae CY |
1406 | } |
1407 | ||
1408 | if (--wbc->nr_to_write <= 0 && | |
1409 | wbc->sync_mode == WB_SYNC_NONE) { | |
1410 | done = 1; | |
1411 | break; | |
1412 | } | |
1413 | } | |
1414 | pagevec_release(&pvec); | |
1415 | cond_resched(); | |
1416 | } | |
1417 | ||
8f46dcae CY |
1418 | if (!cycled && !done) { |
1419 | cycled = 1; | |
1420 | index = 0; | |
1421 | end = writeback_index - 1; | |
1422 | goto retry; | |
1423 | } | |
1424 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1425 | mapping->writeback_index = done_index; | |
1426 | ||
1427 | return ret; | |
1428 | } | |
1429 | ||
25ca923b | 1430 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1431 | struct writeback_control *wbc) |
1432 | { | |
1433 | struct inode *inode = mapping->host; | |
4081363f | 1434 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 | 1435 | int ret; |
eb47b800 | 1436 | |
cfb185a1 | 1437 | /* deal with chardevs and other special file */ |
1438 | if (!mapping->a_ops->writepage) | |
1439 | return 0; | |
1440 | ||
6a290544 CY |
1441 | /* skip writing if there is no dirty page in this inode */ |
1442 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1443 | return 0; | |
1444 | ||
a1257023 JK |
1445 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1446 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1447 | available_free_memory(sbi, DIRTY_DENTS)) | |
1448 | goto skip_write; | |
1449 | ||
d323d005 | 1450 | /* skip writing during file defragment */ |
91942321 | 1451 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
1452 | goto skip_write; |
1453 | ||
d5669f7b JK |
1454 | /* during POR, we don't need to trigger writepage at all. */ |
1455 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1456 | goto skip_write; | |
1457 | ||
d31c7c3f YH |
1458 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1459 | ||
b230e6ca | 1460 | ret = f2fs_write_cache_pages(mapping, wbc); |
28ea6162 JK |
1461 | /* |
1462 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1463 | * to detect pending bios. | |
1464 | */ | |
1465 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
458e6197 | 1466 | |
c227f912 | 1467 | remove_dirty_inode(inode); |
eb47b800 | 1468 | return ret; |
d3baf95d JK |
1469 | |
1470 | skip_write: | |
a7ffdbe2 | 1471 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1472 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1473 | return 0; |
eb47b800 JK |
1474 | } |
1475 | ||
3aab8f82 CY |
1476 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1477 | { | |
1478 | struct inode *inode = mapping->host; | |
819d9153 | 1479 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1480 | |
819d9153 JK |
1481 | if (to > i_size) { |
1482 | truncate_pagecache(inode, i_size); | |
1483 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1484 | } |
1485 | } | |
1486 | ||
2aadac08 JK |
1487 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1488 | struct page *page, loff_t pos, unsigned len, | |
1489 | block_t *blk_addr, bool *node_changed) | |
1490 | { | |
1491 | struct inode *inode = page->mapping->host; | |
1492 | pgoff_t index = page->index; | |
1493 | struct dnode_of_data dn; | |
1494 | struct page *ipage; | |
b4d07a3e JK |
1495 | bool locked = false; |
1496 | struct extent_info ei; | |
2aadac08 JK |
1497 | int err = 0; |
1498 | ||
24b84912 JK |
1499 | /* |
1500 | * we already allocated all the blocks, so we don't need to get | |
1501 | * the block addresses when there is no need to fill the page. | |
1502 | */ | |
1503 | if (!f2fs_has_inline_data(inode) && !f2fs_encrypted_inode(inode) && | |
09cbfeaf | 1504 | len == PAGE_SIZE) |
24b84912 JK |
1505 | return 0; |
1506 | ||
b4d07a3e | 1507 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1508 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1509 | f2fs_lock_op(sbi); |
1510 | locked = true; | |
1511 | } | |
1512 | restart: | |
2aadac08 JK |
1513 | /* check inline_data */ |
1514 | ipage = get_node_page(sbi, inode->i_ino); | |
1515 | if (IS_ERR(ipage)) { | |
1516 | err = PTR_ERR(ipage); | |
1517 | goto unlock_out; | |
1518 | } | |
1519 | ||
1520 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1521 | ||
1522 | if (f2fs_has_inline_data(inode)) { | |
1523 | if (pos + len <= MAX_INLINE_DATA) { | |
1524 | read_inline_data(page, ipage); | |
91942321 | 1525 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
1526 | if (inode->i_nlink) |
1527 | set_inline_node(ipage); | |
2aadac08 JK |
1528 | } else { |
1529 | err = f2fs_convert_inline_page(&dn, page); | |
1530 | if (err) | |
b4d07a3e JK |
1531 | goto out; |
1532 | if (dn.data_blkaddr == NULL_ADDR) | |
1533 | err = f2fs_get_block(&dn, index); | |
1534 | } | |
1535 | } else if (locked) { | |
1536 | err = f2fs_get_block(&dn, index); | |
1537 | } else { | |
1538 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1539 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1540 | } else { | |
b4d07a3e JK |
1541 | /* hole case */ |
1542 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1543 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1544 | f2fs_put_dnode(&dn); |
1545 | f2fs_lock_op(sbi); | |
1546 | locked = true; | |
1547 | goto restart; | |
1548 | } | |
2aadac08 JK |
1549 | } |
1550 | } | |
b4d07a3e | 1551 | |
2aadac08 JK |
1552 | /* convert_inline_page can make node_changed */ |
1553 | *blk_addr = dn.data_blkaddr; | |
1554 | *node_changed = dn.node_changed; | |
b4d07a3e | 1555 | out: |
2aadac08 JK |
1556 | f2fs_put_dnode(&dn); |
1557 | unlock_out: | |
b4d07a3e JK |
1558 | if (locked) |
1559 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1560 | return err; |
1561 | } | |
1562 | ||
eb47b800 JK |
1563 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1564 | loff_t pos, unsigned len, unsigned flags, | |
1565 | struct page **pagep, void **fsdata) | |
1566 | { | |
1567 | struct inode *inode = mapping->host; | |
4081363f | 1568 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1569 | struct page *page = NULL; |
09cbfeaf | 1570 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1571 | bool need_balance = false; |
1572 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1573 | int err = 0; |
1574 | ||
62aed044 CY |
1575 | trace_f2fs_write_begin(inode, pos, len, flags); |
1576 | ||
5f727395 JK |
1577 | /* |
1578 | * We should check this at this moment to avoid deadlock on inode page | |
1579 | * and #0 page. The locking rule for inline_data conversion should be: | |
1580 | * lock_page(page #0) -> lock_page(inode_page) | |
1581 | */ | |
1582 | if (index != 0) { | |
1583 | err = f2fs_convert_inline_inode(inode); | |
1584 | if (err) | |
1585 | goto fail; | |
1586 | } | |
afcb7ca0 | 1587 | repeat: |
eb47b800 | 1588 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1589 | if (!page) { |
1590 | err = -ENOMEM; | |
1591 | goto fail; | |
1592 | } | |
d5f66990 | 1593 | |
eb47b800 JK |
1594 | *pagep = page; |
1595 | ||
2aadac08 JK |
1596 | err = prepare_write_begin(sbi, page, pos, len, |
1597 | &blkaddr, &need_balance); | |
9ba69cf9 | 1598 | if (err) |
2aadac08 | 1599 | goto fail; |
9ba69cf9 | 1600 | |
2aadac08 | 1601 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 | 1602 | unlock_page(page); |
2c4db1a6 | 1603 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1604 | lock_page(page); |
1605 | if (page->mapping != mapping) { | |
1606 | /* The page got truncated from under us */ | |
1607 | f2fs_put_page(page, 1); | |
1608 | goto repeat; | |
1609 | } | |
1610 | } | |
1611 | ||
fec1d657 | 1612 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1613 | |
08b39fbd CY |
1614 | /* wait for GCed encrypted page writeback */ |
1615 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1616 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1617 | |
09cbfeaf | 1618 | if (len == PAGE_SIZE) |
90d4388a CY |
1619 | goto out_update; |
1620 | if (PageUptodate(page)) | |
1621 | goto out_clear; | |
eb47b800 | 1622 | |
09cbfeaf KS |
1623 | if ((pos & PAGE_MASK) >= i_size_read(inode)) { |
1624 | unsigned start = pos & (PAGE_SIZE - 1); | |
eb47b800 JK |
1625 | unsigned end = start + len; |
1626 | ||
1627 | /* Reading beyond i_size is simple: memset to zero */ | |
09cbfeaf | 1628 | zero_user_segments(page, 0, start, end, PAGE_SIZE); |
90d4388a | 1629 | goto out_update; |
eb47b800 JK |
1630 | } |
1631 | ||
2aadac08 | 1632 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1633 | zero_user_segment(page, 0, PAGE_SIZE); |
eb47b800 | 1634 | } else { |
78682f79 CY |
1635 | struct bio *bio; |
1636 | ||
1637 | bio = f2fs_grab_bio(inode, blkaddr, 1); | |
1638 | if (IS_ERR(bio)) { | |
1639 | err = PTR_ERR(bio); | |
9234f319 | 1640 | goto fail; |
78682f79 CY |
1641 | } |
1642 | ||
1643 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { | |
1644 | bio_put(bio); | |
1645 | err = -EFAULT; | |
1646 | goto fail; | |
1647 | } | |
1648 | ||
1649 | __submit_bio(sbi, READ_SYNC, bio, DATA); | |
d54c795b | 1650 | |
393ff91f | 1651 | lock_page(page); |
6bacf52f | 1652 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1653 | f2fs_put_page(page, 1); |
1654 | goto repeat; | |
eb47b800 | 1655 | } |
1563ac75 CY |
1656 | if (unlikely(!PageUptodate(page))) { |
1657 | err = -EIO; | |
1658 | goto fail; | |
1659 | } | |
eb47b800 | 1660 | } |
90d4388a | 1661 | out_update: |
eb47b800 | 1662 | SetPageUptodate(page); |
90d4388a | 1663 | out_clear: |
eb47b800 JK |
1664 | clear_cold_data(page); |
1665 | return 0; | |
9ba69cf9 | 1666 | |
3aab8f82 | 1667 | fail: |
86531d6b | 1668 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1669 | f2fs_write_failed(mapping, pos + len); |
1670 | return err; | |
eb47b800 JK |
1671 | } |
1672 | ||
a1dd3c13 JK |
1673 | static int f2fs_write_end(struct file *file, |
1674 | struct address_space *mapping, | |
1675 | loff_t pos, unsigned len, unsigned copied, | |
1676 | struct page *page, void *fsdata) | |
1677 | { | |
1678 | struct inode *inode = page->mapping->host; | |
1679 | ||
dfb2bf38 CY |
1680 | trace_f2fs_write_end(inode, pos, len, copied); |
1681 | ||
34ba94ba | 1682 | set_page_dirty(page); |
a1dd3c13 | 1683 | |
fc9581c8 JK |
1684 | if (pos + copied > i_size_read(inode)) |
1685 | f2fs_i_size_write(inode, pos + copied); | |
a1dd3c13 | 1686 | |
75c3c8bc | 1687 | f2fs_put_page(page, 1); |
d0239e1b | 1688 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1689 | return copied; |
1690 | } | |
1691 | ||
6f673763 OS |
1692 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1693 | loff_t offset) | |
944fcfc1 JK |
1694 | { |
1695 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1696 | |
944fcfc1 JK |
1697 | if (offset & blocksize_mask) |
1698 | return -EINVAL; | |
1699 | ||
5b46f25d AV |
1700 | if (iov_iter_alignment(iter) & blocksize_mask) |
1701 | return -EINVAL; | |
1702 | ||
944fcfc1 JK |
1703 | return 0; |
1704 | } | |
1705 | ||
c8b8e32d | 1706 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 1707 | { |
b439b103 | 1708 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1709 | struct inode *inode = mapping->host; |
1710 | size_t count = iov_iter_count(iter); | |
c8b8e32d | 1711 | loff_t offset = iocb->ki_pos; |
3aab8f82 | 1712 | int err; |
944fcfc1 | 1713 | |
b439b103 | 1714 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1715 | if (err) |
1716 | return err; | |
9ffe0fb5 | 1717 | |
fcc85a4d JK |
1718 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1719 | return 0; | |
36abef4e JK |
1720 | if (test_opt(F2FS_I_SB(inode), LFS)) |
1721 | return 0; | |
fcc85a4d | 1722 | |
6f673763 | 1723 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1724 | |
c8b8e32d | 1725 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
6bfc4919 JK |
1726 | if (iov_iter_rw(iter) == WRITE) { |
1727 | if (err > 0) | |
91942321 | 1728 | set_inode_flag(inode, FI_UPDATE_WRITE); |
6bfc4919 JK |
1729 | else if (err < 0) |
1730 | f2fs_write_failed(mapping, offset + count); | |
1731 | } | |
70407fad | 1732 | |
6f673763 | 1733 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1734 | |
3aab8f82 | 1735 | return err; |
eb47b800 JK |
1736 | } |
1737 | ||
487261f3 CY |
1738 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1739 | unsigned int length) | |
eb47b800 JK |
1740 | { |
1741 | struct inode *inode = page->mapping->host; | |
487261f3 | 1742 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1743 | |
487261f3 | 1744 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1745 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1746 | return; |
1747 | ||
487261f3 CY |
1748 | if (PageDirty(page)) { |
1749 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1750 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1751 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1752 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1753 | else | |
1754 | inode_dec_dirty_pages(inode); | |
1755 | } | |
decd36b6 CY |
1756 | |
1757 | /* This is atomic written page, keep Private */ | |
1758 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1759 | return; | |
1760 | ||
23dc974e | 1761 | set_page_private(page, 0); |
eb47b800 JK |
1762 | ClearPagePrivate(page); |
1763 | } | |
1764 | ||
487261f3 | 1765 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1766 | { |
f68daeeb JK |
1767 | /* If this is dirty page, keep PagePrivate */ |
1768 | if (PageDirty(page)) | |
1769 | return 0; | |
1770 | ||
decd36b6 CY |
1771 | /* This is atomic written page, keep Private */ |
1772 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1773 | return 0; | |
1774 | ||
23dc974e | 1775 | set_page_private(page, 0); |
eb47b800 | 1776 | ClearPagePrivate(page); |
c3850aa1 | 1777 | return 1; |
eb47b800 JK |
1778 | } |
1779 | ||
fe76b796 JK |
1780 | /* |
1781 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
1782 | * in very high speed storages. (e.g., pmem) | |
1783 | */ | |
1784 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
1785 | { | |
1786 | struct address_space *mapping = page->mapping; | |
1787 | unsigned long flags; | |
1788 | ||
1789 | if (unlikely(!mapping)) | |
1790 | return; | |
1791 | ||
1792 | spin_lock(&mapping->private_lock); | |
1793 | lock_page_memcg(page); | |
1794 | SetPageDirty(page); | |
1795 | spin_unlock(&mapping->private_lock); | |
1796 | ||
1797 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
1798 | WARN_ON_ONCE(!PageUptodate(page)); | |
1799 | account_page_dirtied(page, mapping); | |
1800 | radix_tree_tag_set(&mapping->page_tree, | |
1801 | page_index(page), PAGECACHE_TAG_DIRTY); | |
1802 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
1803 | unlock_page_memcg(page); | |
1804 | ||
1805 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
1806 | return; | |
1807 | } | |
1808 | ||
eb47b800 JK |
1809 | static int f2fs_set_data_page_dirty(struct page *page) |
1810 | { | |
1811 | struct address_space *mapping = page->mapping; | |
1812 | struct inode *inode = mapping->host; | |
1813 | ||
26c6b887 JK |
1814 | trace_f2fs_set_page_dirty(page, DATA); |
1815 | ||
eb47b800 | 1816 | SetPageUptodate(page); |
34ba94ba | 1817 | |
1e84371f | 1818 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1819 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1820 | register_inmem_page(inode, page); | |
1821 | return 1; | |
1822 | } | |
1823 | /* | |
1824 | * Previously, this page has been registered, we just | |
1825 | * return here. | |
1826 | */ | |
1827 | return 0; | |
34ba94ba JK |
1828 | } |
1829 | ||
eb47b800 | 1830 | if (!PageDirty(page)) { |
fe76b796 | 1831 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 1832 | update_dirty_page(inode, page); |
eb47b800 JK |
1833 | return 1; |
1834 | } | |
1835 | return 0; | |
1836 | } | |
1837 | ||
c01e54b7 JK |
1838 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1839 | { | |
454ae7e5 CY |
1840 | struct inode *inode = mapping->host; |
1841 | ||
1d373a0e JK |
1842 | if (f2fs_has_inline_data(inode)) |
1843 | return 0; | |
1844 | ||
1845 | /* make sure allocating whole blocks */ | |
1846 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1847 | filemap_write_and_wait(mapping); | |
1848 | ||
e2b4e2bc | 1849 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1850 | } |
1851 | ||
eb47b800 JK |
1852 | const struct address_space_operations f2fs_dblock_aops = { |
1853 | .readpage = f2fs_read_data_page, | |
1854 | .readpages = f2fs_read_data_pages, | |
1855 | .writepage = f2fs_write_data_page, | |
1856 | .writepages = f2fs_write_data_pages, | |
1857 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1858 | .write_end = f2fs_write_end, |
eb47b800 | 1859 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1860 | .invalidatepage = f2fs_invalidate_page, |
1861 | .releasepage = f2fs_release_page, | |
eb47b800 | 1862 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1863 | .bmap = f2fs_bmap, |
eb47b800 | 1864 | }; |