Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
fe76b796 JK |
22 | #include <linux/mm.h> |
23 | #include <linux/memcontrol.h> | |
f1e88660 | 24 | #include <linux/cleancache.h> |
eb47b800 JK |
25 | |
26 | #include "f2fs.h" | |
27 | #include "node.h" | |
28 | #include "segment.h" | |
db9f7c1a | 29 | #include "trace.h" |
848753aa | 30 | #include <trace/events/f2fs.h> |
eb47b800 | 31 | |
4246a0b6 | 32 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 33 | { |
f568849e LT |
34 | struct bio_vec *bvec; |
35 | int i; | |
93dfe2ac | 36 | |
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) { |
237c0790 JK |
50 | if (!PageUptodate(page)) |
51 | SetPageUptodate(page); | |
f1e88660 JK |
52 | } else { |
53 | ClearPageUptodate(page); | |
54 | SetPageError(page); | |
55 | } | |
56 | unlock_page(page); | |
57 | } | |
f1e88660 JK |
58 | bio_put(bio); |
59 | } | |
60 | ||
4246a0b6 | 61 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 62 | { |
1b1f559f | 63 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
64 | struct bio_vec *bvec; |
65 | int i; | |
93dfe2ac | 66 | |
f568849e | 67 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
68 | struct page *page = bvec->bv_page; |
69 | ||
0b81d077 | 70 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 71 | |
4246a0b6 | 72 | if (unlikely(bio->bi_error)) { |
93dfe2ac | 73 | set_bit(AS_EIO, &page->mapping->flags); |
38f91ca8 | 74 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac JK |
75 | } |
76 | end_page_writeback(page); | |
f568849e | 77 | } |
f5730184 JK |
78 | if (atomic_dec_and_test(&sbi->nr_wb_bios) && |
79 | wq_has_sleeper(&sbi->cp_wait)) | |
93dfe2ac JK |
80 | wake_up(&sbi->cp_wait); |
81 | ||
82 | bio_put(bio); | |
83 | } | |
84 | ||
940a6d34 GZ |
85 | /* |
86 | * Low-level block read/write IO operations. | |
87 | */ | |
88 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
89 | int npages, bool is_read) | |
90 | { | |
91 | struct bio *bio; | |
92 | ||
740432f8 | 93 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
94 | |
95 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 96 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 97 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 98 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
99 | |
100 | return bio; | |
101 | } | |
102 | ||
4fc29c1a LT |
103 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
104 | struct bio *bio, enum page_type type) | |
f5730184 | 105 | { |
4fc29c1a | 106 | if (!is_read_io(bio_op(bio))) { |
f5730184 | 107 | atomic_inc(&sbi->nr_wb_bios); |
52763a4b JK |
108 | if (f2fs_sb_mounted_hmsmr(sbi->sb) && |
109 | current->plug && (type == DATA || type == NODE)) | |
19a5f5e2 JK |
110 | blk_finish_plug(current->plug); |
111 | } | |
4e49ea4a | 112 | submit_bio(bio); |
f5730184 JK |
113 | } |
114 | ||
458e6197 | 115 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 116 | { |
458e6197 | 117 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
118 | |
119 | if (!io->bio) | |
120 | return; | |
121 | ||
04d328de | 122 | if (is_read_io(fio->op)) |
2ace38e0 | 123 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 124 | else |
2ace38e0 | 125 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 126 | |
04d328de MC |
127 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
128 | ||
4fc29c1a | 129 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
130 | io->bio = NULL; |
131 | } | |
132 | ||
0c3a5797 CY |
133 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
134 | struct page *page, nid_t ino) | |
0fd785eb | 135 | { |
0fd785eb CY |
136 | struct bio_vec *bvec; |
137 | struct page *target; | |
138 | int i; | |
139 | ||
0c3a5797 | 140 | if (!io->bio) |
0fd785eb | 141 | return false; |
0c3a5797 CY |
142 | |
143 | if (!inode && !page && !ino) | |
144 | return true; | |
0fd785eb CY |
145 | |
146 | bio_for_each_segment_all(bvec, io->bio, i) { | |
147 | ||
0b81d077 | 148 | if (bvec->bv_page->mapping) |
0fd785eb | 149 | target = bvec->bv_page; |
0b81d077 JK |
150 | else |
151 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 152 | |
0c3a5797 CY |
153 | if (inode && inode == target->mapping->host) |
154 | return true; | |
155 | if (page && page == target) | |
156 | return true; | |
157 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 158 | return true; |
0fd785eb CY |
159 | } |
160 | ||
0fd785eb CY |
161 | return false; |
162 | } | |
163 | ||
0c3a5797 CY |
164 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
165 | struct page *page, nid_t ino, | |
166 | enum page_type type) | |
167 | { | |
168 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
169 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
170 | bool ret; | |
171 | ||
172 | down_read(&io->io_rwsem); | |
173 | ret = __has_merged_page(io, inode, page, ino); | |
174 | up_read(&io->io_rwsem); | |
175 | return ret; | |
176 | } | |
177 | ||
178 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
179 | struct inode *inode, struct page *page, | |
180 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
181 | { |
182 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
183 | struct f2fs_bio_info *io; | |
184 | ||
185 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
186 | ||
df0f8dc0 | 187 | down_write(&io->io_rwsem); |
458e6197 | 188 | |
0c3a5797 CY |
189 | if (!__has_merged_page(io, inode, page, ino)) |
190 | goto out; | |
191 | ||
458e6197 JK |
192 | /* change META to META_FLUSH in the checkpoint procedure */ |
193 | if (type >= META_FLUSH) { | |
194 | io->fio.type = META_FLUSH; | |
04d328de | 195 | io->fio.op = REQ_OP_WRITE; |
0f7b2abd | 196 | if (test_opt(sbi, NOBARRIER)) |
04d328de | 197 | io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO; |
0f7b2abd | 198 | else |
04d328de MC |
199 | io->fio.op_flags = WRITE_FLUSH_FUA | REQ_META | |
200 | REQ_PRIO; | |
458e6197 JK |
201 | } |
202 | __submit_merged_bio(io); | |
0c3a5797 | 203 | out: |
df0f8dc0 | 204 | up_write(&io->io_rwsem); |
93dfe2ac JK |
205 | } |
206 | ||
0c3a5797 CY |
207 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
208 | int rw) | |
209 | { | |
210 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
211 | } | |
212 | ||
213 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
214 | struct inode *inode, struct page *page, | |
215 | nid_t ino, enum page_type type, int rw) | |
216 | { | |
217 | if (has_merged_page(sbi, inode, page, ino, type)) | |
218 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
219 | } | |
220 | ||
406657dd CY |
221 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
222 | { | |
223 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
224 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
225 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
226 | } | |
227 | ||
93dfe2ac JK |
228 | /* |
229 | * Fill the locked page with data located in the block address. | |
230 | * Return unlocked page. | |
231 | */ | |
05ca3632 | 232 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 233 | { |
93dfe2ac | 234 | struct bio *bio; |
0b81d077 JK |
235 | struct page *page = fio->encrypted_page ? |
236 | fio->encrypted_page : fio->page; | |
93dfe2ac | 237 | |
2ace38e0 | 238 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 239 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
240 | |
241 | /* Allocate a new bio */ | |
04d328de | 242 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 243 | |
09cbfeaf | 244 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 245 | bio_put(bio); |
93dfe2ac JK |
246 | return -EFAULT; |
247 | } | |
04d328de MC |
248 | bio->bi_rw = fio->op_flags; |
249 | bio_set_op_attrs(bio, fio->op, fio->op_flags); | |
93dfe2ac | 250 | |
4fc29c1a | 251 | __submit_bio(fio->sbi, bio, fio->type); |
93dfe2ac JK |
252 | return 0; |
253 | } | |
254 | ||
05ca3632 | 255 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 256 | { |
05ca3632 | 257 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 258 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 259 | struct f2fs_bio_info *io; |
04d328de | 260 | bool is_read = is_read_io(fio->op); |
4375a336 | 261 | struct page *bio_page; |
93dfe2ac | 262 | |
940a6d34 | 263 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 264 | |
7a9d7548 CY |
265 | if (fio->old_blkaddr != NEW_ADDR) |
266 | verify_block_addr(sbi, fio->old_blkaddr); | |
267 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 268 | |
df0f8dc0 | 269 | down_write(&io->io_rwsem); |
93dfe2ac | 270 | |
7a9d7548 | 271 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
04d328de | 272 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags))) |
458e6197 | 273 | __submit_merged_bio(io); |
93dfe2ac JK |
274 | alloc_new: |
275 | if (io->bio == NULL) { | |
90a893c7 | 276 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 277 | |
7a9d7548 CY |
278 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
279 | bio_blocks, is_read); | |
458e6197 | 280 | io->fio = *fio; |
93dfe2ac JK |
281 | } |
282 | ||
4375a336 JK |
283 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
284 | ||
09cbfeaf KS |
285 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
286 | PAGE_SIZE) { | |
458e6197 | 287 | __submit_merged_bio(io); |
93dfe2ac JK |
288 | goto alloc_new; |
289 | } | |
290 | ||
7a9d7548 | 291 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 292 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 293 | |
df0f8dc0 | 294 | up_write(&io->io_rwsem); |
05ca3632 | 295 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
296 | } |
297 | ||
46008c6d CY |
298 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
299 | { | |
300 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
301 | __le32 *addr_array; | |
302 | ||
303 | /* Get physical address of data block */ | |
304 | addr_array = blkaddr_in_node(rn); | |
305 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
306 | } | |
307 | ||
0a8165d7 | 308 | /* |
eb47b800 JK |
309 | * Lock ordering for the change of data block address: |
310 | * ->data_page | |
311 | * ->node_page | |
312 | * update block addresses in the node page | |
313 | */ | |
216a620a | 314 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 315 | { |
46008c6d CY |
316 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
317 | __set_data_blkaddr(dn); | |
318 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 319 | dn->node_changed = true; |
eb47b800 JK |
320 | } |
321 | ||
f28b3434 CY |
322 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
323 | { | |
324 | dn->data_blkaddr = blkaddr; | |
325 | set_data_blkaddr(dn); | |
326 | f2fs_update_extent_cache(dn); | |
327 | } | |
328 | ||
46008c6d CY |
329 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
330 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 331 | { |
4081363f | 332 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 333 | |
46008c6d CY |
334 | if (!count) |
335 | return 0; | |
336 | ||
91942321 | 337 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 338 | return -EPERM; |
46008c6d | 339 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
340 | return -ENOSPC; |
341 | ||
46008c6d CY |
342 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
343 | dn->ofs_in_node, count); | |
344 | ||
345 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
346 | ||
347 | for (; count > 0; dn->ofs_in_node++) { | |
348 | block_t blkaddr = | |
349 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
350 | if (blkaddr == NULL_ADDR) { | |
351 | dn->data_blkaddr = NEW_ADDR; | |
352 | __set_data_blkaddr(dn); | |
353 | count--; | |
354 | } | |
355 | } | |
356 | ||
357 | if (set_page_dirty(dn->node_page)) | |
358 | dn->node_changed = true; | |
eb47b800 JK |
359 | return 0; |
360 | } | |
361 | ||
46008c6d CY |
362 | /* Should keep dn->ofs_in_node unchanged */ |
363 | int reserve_new_block(struct dnode_of_data *dn) | |
364 | { | |
365 | unsigned int ofs_in_node = dn->ofs_in_node; | |
366 | int ret; | |
367 | ||
368 | ret = reserve_new_blocks(dn, 1); | |
369 | dn->ofs_in_node = ofs_in_node; | |
370 | return ret; | |
371 | } | |
372 | ||
b600965c HL |
373 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
374 | { | |
375 | bool need_put = dn->inode_page ? false : true; | |
376 | int err; | |
377 | ||
378 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
379 | if (err) | |
380 | return err; | |
a8865372 | 381 | |
b600965c HL |
382 | if (dn->data_blkaddr == NULL_ADDR) |
383 | err = reserve_new_block(dn); | |
a8865372 | 384 | if (err || need_put) |
b600965c HL |
385 | f2fs_put_dnode(dn); |
386 | return err; | |
387 | } | |
388 | ||
759af1c9 | 389 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 390 | { |
028a41e8 | 391 | struct extent_info ei; |
759af1c9 | 392 | struct inode *inode = dn->inode; |
028a41e8 | 393 | |
759af1c9 FL |
394 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
395 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
396 | return 0; | |
429511cd | 397 | } |
028a41e8 | 398 | |
759af1c9 | 399 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
400 | } |
401 | ||
a56c7c6f | 402 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 403 | int op_flags, bool for_write) |
eb47b800 | 404 | { |
eb47b800 JK |
405 | struct address_space *mapping = inode->i_mapping; |
406 | struct dnode_of_data dn; | |
407 | struct page *page; | |
cb3bc9ee | 408 | struct extent_info ei; |
eb47b800 | 409 | int err; |
cf04e8eb | 410 | struct f2fs_io_info fio = { |
05ca3632 | 411 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 412 | .type = DATA, |
04d328de MC |
413 | .op = REQ_OP_READ, |
414 | .op_flags = op_flags, | |
4375a336 | 415 | .encrypted_page = NULL, |
cf04e8eb | 416 | }; |
eb47b800 | 417 | |
4375a336 JK |
418 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
419 | return read_mapping_page(mapping, index, NULL); | |
420 | ||
a56c7c6f | 421 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
422 | if (!page) |
423 | return ERR_PTR(-ENOMEM); | |
424 | ||
cb3bc9ee CY |
425 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
426 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
427 | goto got_it; | |
428 | } | |
429 | ||
eb47b800 | 430 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 431 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
432 | if (err) |
433 | goto put_err; | |
eb47b800 JK |
434 | f2fs_put_dnode(&dn); |
435 | ||
6bacf52f | 436 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
437 | err = -ENOENT; |
438 | goto put_err; | |
650495de | 439 | } |
cb3bc9ee | 440 | got_it: |
43f3eae1 JK |
441 | if (PageUptodate(page)) { |
442 | unlock_page(page); | |
eb47b800 | 443 | return page; |
43f3eae1 | 444 | } |
eb47b800 | 445 | |
d59ff4df JK |
446 | /* |
447 | * A new dentry page is allocated but not able to be written, since its | |
448 | * new inode page couldn't be allocated due to -ENOSPC. | |
449 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
450 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
451 | */ | |
452 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 453 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
454 | if (!PageUptodate(page)) |
455 | SetPageUptodate(page); | |
43f3eae1 | 456 | unlock_page(page); |
d59ff4df JK |
457 | return page; |
458 | } | |
eb47b800 | 459 | |
7a9d7548 | 460 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
461 | fio.page = page; |
462 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 463 | if (err) |
86531d6b | 464 | goto put_err; |
43f3eae1 | 465 | return page; |
86531d6b JK |
466 | |
467 | put_err: | |
468 | f2fs_put_page(page, 1); | |
469 | return ERR_PTR(err); | |
43f3eae1 JK |
470 | } |
471 | ||
472 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
473 | { | |
474 | struct address_space *mapping = inode->i_mapping; | |
475 | struct page *page; | |
476 | ||
477 | page = find_get_page(mapping, index); | |
478 | if (page && PageUptodate(page)) | |
479 | return page; | |
480 | f2fs_put_page(page, 0); | |
481 | ||
a56c7c6f | 482 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
483 | if (IS_ERR(page)) |
484 | return page; | |
485 | ||
486 | if (PageUptodate(page)) | |
487 | return page; | |
488 | ||
489 | wait_on_page_locked(page); | |
490 | if (unlikely(!PageUptodate(page))) { | |
491 | f2fs_put_page(page, 0); | |
492 | return ERR_PTR(-EIO); | |
493 | } | |
494 | return page; | |
495 | } | |
496 | ||
497 | /* | |
498 | * If it tries to access a hole, return an error. | |
499 | * Because, the callers, functions in dir.c and GC, should be able to know | |
500 | * whether this page exists or not. | |
501 | */ | |
a56c7c6f JK |
502 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
503 | bool for_write) | |
43f3eae1 JK |
504 | { |
505 | struct address_space *mapping = inode->i_mapping; | |
506 | struct page *page; | |
507 | repeat: | |
a56c7c6f | 508 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
509 | if (IS_ERR(page)) |
510 | return page; | |
393ff91f | 511 | |
43f3eae1 | 512 | /* wait for read completion */ |
393ff91f | 513 | lock_page(page); |
6bacf52f | 514 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
515 | f2fs_put_page(page, 1); |
516 | goto repeat; | |
eb47b800 | 517 | } |
1563ac75 CY |
518 | if (unlikely(!PageUptodate(page))) { |
519 | f2fs_put_page(page, 1); | |
520 | return ERR_PTR(-EIO); | |
521 | } | |
eb47b800 JK |
522 | return page; |
523 | } | |
524 | ||
0a8165d7 | 525 | /* |
eb47b800 JK |
526 | * Caller ensures that this data page is never allocated. |
527 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 528 | * |
4f4124d0 CY |
529 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
530 | * f2fs_unlock_op(). | |
470f00e9 CY |
531 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
532 | * ipage should be released by this function. | |
eb47b800 | 533 | */ |
64aa7ed9 | 534 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 535 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 536 | { |
eb47b800 JK |
537 | struct address_space *mapping = inode->i_mapping; |
538 | struct page *page; | |
539 | struct dnode_of_data dn; | |
540 | int err; | |
7612118a | 541 | |
a56c7c6f | 542 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
543 | if (!page) { |
544 | /* | |
545 | * before exiting, we should make sure ipage will be released | |
546 | * if any error occur. | |
547 | */ | |
548 | f2fs_put_page(ipage, 1); | |
01f28610 | 549 | return ERR_PTR(-ENOMEM); |
470f00e9 | 550 | } |
eb47b800 | 551 | |
a8865372 | 552 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 553 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
554 | if (err) { |
555 | f2fs_put_page(page, 1); | |
eb47b800 | 556 | return ERR_PTR(err); |
a8865372 | 557 | } |
01f28610 JK |
558 | if (!ipage) |
559 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
560 | |
561 | if (PageUptodate(page)) | |
01f28610 | 562 | goto got_it; |
eb47b800 JK |
563 | |
564 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 565 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
566 | if (!PageUptodate(page)) |
567 | SetPageUptodate(page); | |
eb47b800 | 568 | } else { |
4375a336 | 569 | f2fs_put_page(page, 1); |
a8865372 | 570 | |
7612118a JK |
571 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
572 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
573 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 574 | if (IS_ERR(page)) |
7612118a | 575 | return page; |
eb47b800 | 576 | } |
01f28610 | 577 | got_it: |
9edcdabf | 578 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 579 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 580 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
581 | return page; |
582 | } | |
583 | ||
bfad7c2d JK |
584 | static int __allocate_data_block(struct dnode_of_data *dn) |
585 | { | |
4081363f | 586 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 587 | struct f2fs_summary sum; |
bfad7c2d | 588 | struct node_info ni; |
38aa0889 | 589 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 590 | pgoff_t fofs; |
46008c6d | 591 | blkcnt_t count = 1; |
bfad7c2d | 592 | |
91942321 | 593 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 594 | return -EPERM; |
df6136ef CY |
595 | |
596 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
597 | if (dn->data_blkaddr == NEW_ADDR) | |
598 | goto alloc; | |
599 | ||
46008c6d | 600 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
601 | return -ENOSPC; |
602 | ||
df6136ef | 603 | alloc: |
bfad7c2d JK |
604 | get_node_info(sbi, dn->nid, &ni); |
605 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
606 | ||
38aa0889 JK |
607 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
608 | seg = CURSEG_DIRECT_IO; | |
609 | ||
df6136ef CY |
610 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
611 | &sum, seg); | |
216a620a | 612 | set_data_blkaddr(dn); |
bfad7c2d | 613 | |
976e4c50 | 614 | /* update i_size */ |
81ca7350 | 615 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 616 | dn->ofs_in_node; |
09cbfeaf | 617 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 618 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 619 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
620 | return 0; |
621 | } | |
622 | ||
b439b103 | 623 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 624 | { |
b439b103 | 625 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 626 | struct f2fs_map_blocks map; |
b439b103 | 627 | ssize_t ret = 0; |
59b802e5 | 628 | |
0080c507 JK |
629 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
630 | map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from)); | |
da85985c | 631 | map.m_next_pgofs = NULL; |
2a340760 | 632 | |
24b84912 JK |
633 | if (f2fs_encrypted_inode(inode)) |
634 | return 0; | |
635 | ||
636 | if (iocb->ki_flags & IOCB_DIRECT) { | |
637 | ret = f2fs_convert_inline_inode(inode); | |
638 | if (ret) | |
639 | return ret; | |
640 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); | |
641 | } | |
642 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
b439b103 JK |
643 | ret = f2fs_convert_inline_inode(inode); |
644 | if (ret) | |
645 | return ret; | |
b439b103 | 646 | } |
24b84912 JK |
647 | if (!f2fs_has_inline_data(inode)) |
648 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
b439b103 | 649 | return ret; |
59b802e5 JK |
650 | } |
651 | ||
0a8165d7 | 652 | /* |
003a3e1d JK |
653 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
654 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
655 | * If original data blocks are allocated, then give them to blockdev. |
656 | * Otherwise, | |
657 | * a. preallocate requested block addresses | |
658 | * b. do not use extent cache for better performance | |
659 | * c. give the block addresses to blockdev | |
eb47b800 | 660 | */ |
d323d005 | 661 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 662 | int create, int flag) |
eb47b800 | 663 | { |
003a3e1d | 664 | unsigned int maxblocks = map->m_len; |
eb47b800 | 665 | struct dnode_of_data dn; |
f9811703 | 666 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 667 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 668 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 669 | int err = 0, ofs = 1; |
46008c6d CY |
670 | unsigned int ofs_in_node, last_ofs_in_node; |
671 | blkcnt_t prealloc; | |
a2e7d1bf | 672 | struct extent_info ei; |
bfad7c2d | 673 | bool allocated = false; |
7df3a431 | 674 | block_t blkaddr; |
eb47b800 | 675 | |
003a3e1d JK |
676 | map->m_len = 0; |
677 | map->m_flags = 0; | |
678 | ||
679 | /* it only supports block size == page size */ | |
680 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 681 | end = pgofs + maxblocks; |
eb47b800 | 682 | |
24b84912 | 683 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
684 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
685 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
686 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 687 | goto out; |
a2e7d1bf | 688 | } |
bfad7c2d | 689 | |
4fe71e88 | 690 | next_dnode: |
59b802e5 | 691 | if (create) |
3104af35 | 692 | f2fs_lock_op(sbi); |
eb47b800 JK |
693 | |
694 | /* When reading holes, we need its node page */ | |
695 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 696 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 697 | if (err) { |
43473f96 CY |
698 | if (flag == F2FS_GET_BLOCK_BMAP) |
699 | map->m_pblk = 0; | |
da85985c | 700 | if (err == -ENOENT) { |
bfad7c2d | 701 | err = 0; |
da85985c CY |
702 | if (map->m_next_pgofs) |
703 | *map->m_next_pgofs = | |
704 | get_next_page_offset(&dn, pgofs); | |
705 | } | |
bfad7c2d | 706 | goto unlock_out; |
848753aa | 707 | } |
973163fc | 708 | |
46008c6d CY |
709 | prealloc = 0; |
710 | ofs_in_node = dn.ofs_in_node; | |
81ca7350 | 711 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
712 | |
713 | next_block: | |
714 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
715 | ||
716 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 717 | if (create) { |
f9811703 CY |
718 | if (unlikely(f2fs_cp_error(sbi))) { |
719 | err = -EIO; | |
4fe71e88 | 720 | goto sync_out; |
f9811703 | 721 | } |
24b84912 | 722 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
723 | if (blkaddr == NULL_ADDR) { |
724 | prealloc++; | |
725 | last_ofs_in_node = dn.ofs_in_node; | |
726 | } | |
24b84912 JK |
727 | } else { |
728 | err = __allocate_data_block(&dn); | |
46008c6d | 729 | if (!err) { |
91942321 | 730 | set_inode_flag(inode, FI_APPEND_WRITE); |
46008c6d CY |
731 | allocated = true; |
732 | } | |
24b84912 | 733 | } |
973163fc | 734 | if (err) |
4fe71e88 | 735 | goto sync_out; |
973163fc | 736 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 737 | blkaddr = dn.data_blkaddr; |
973163fc | 738 | } else { |
43473f96 CY |
739 | if (flag == F2FS_GET_BLOCK_BMAP) { |
740 | map->m_pblk = 0; | |
741 | goto sync_out; | |
742 | } | |
da85985c CY |
743 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
744 | blkaddr == NULL_ADDR) { | |
745 | if (map->m_next_pgofs) | |
746 | *map->m_next_pgofs = pgofs + 1; | |
747 | } | |
973163fc | 748 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 749 | blkaddr != NEW_ADDR) |
4fe71e88 | 750 | goto sync_out; |
e2b4e2bc | 751 | } |
e2b4e2bc | 752 | } |
eb47b800 | 753 | |
46008c6d CY |
754 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
755 | goto skip; | |
756 | ||
4fe71e88 CY |
757 | if (map->m_len == 0) { |
758 | /* preallocated unwritten block should be mapped for fiemap. */ | |
759 | if (blkaddr == NEW_ADDR) | |
760 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
761 | map->m_flags |= F2FS_MAP_MAPPED; | |
762 | ||
763 | map->m_pblk = blkaddr; | |
764 | map->m_len = 1; | |
765 | } else if ((map->m_pblk != NEW_ADDR && | |
766 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 767 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 768 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
769 | ofs++; |
770 | map->m_len++; | |
771 | } else { | |
772 | goto sync_out; | |
773 | } | |
bfad7c2d | 774 | |
46008c6d | 775 | skip: |
bfad7c2d JK |
776 | dn.ofs_in_node++; |
777 | pgofs++; | |
778 | ||
46008c6d CY |
779 | /* preallocate blocks in batch for one dnode page */ |
780 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
781 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 782 | |
46008c6d CY |
783 | dn.ofs_in_node = ofs_in_node; |
784 | err = reserve_new_blocks(&dn, prealloc); | |
785 | if (err) | |
786 | goto sync_out; | |
bfad7c2d | 787 | |
46008c6d CY |
788 | map->m_len += dn.ofs_in_node - ofs_in_node; |
789 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
790 | err = -ENOSPC; | |
791 | goto sync_out; | |
3104af35 | 792 | } |
46008c6d CY |
793 | dn.ofs_in_node = end_offset; |
794 | } | |
795 | ||
796 | if (pgofs >= end) | |
797 | goto sync_out; | |
798 | else if (dn.ofs_in_node < end_offset) | |
799 | goto next_block; | |
800 | ||
46008c6d CY |
801 | f2fs_put_dnode(&dn); |
802 | ||
803 | if (create) { | |
804 | f2fs_unlock_op(sbi); | |
805 | f2fs_balance_fs(sbi, allocated); | |
eb47b800 | 806 | } |
46008c6d CY |
807 | allocated = false; |
808 | goto next_dnode; | |
7df3a431 | 809 | |
bfad7c2d | 810 | sync_out: |
eb47b800 | 811 | f2fs_put_dnode(&dn); |
bfad7c2d | 812 | unlock_out: |
2a340760 | 813 | if (create) { |
3104af35 | 814 | f2fs_unlock_op(sbi); |
3c082b7b | 815 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 816 | } |
bfad7c2d | 817 | out: |
003a3e1d | 818 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 819 | return err; |
eb47b800 JK |
820 | } |
821 | ||
003a3e1d | 822 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
823 | struct buffer_head *bh, int create, int flag, |
824 | pgoff_t *next_pgofs) | |
003a3e1d JK |
825 | { |
826 | struct f2fs_map_blocks map; | |
827 | int ret; | |
828 | ||
829 | map.m_lblk = iblock; | |
830 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 831 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 832 | |
e2b4e2bc | 833 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
834 | if (!ret) { |
835 | map_bh(bh, inode->i_sb, map.m_pblk); | |
836 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
837 | bh->b_size = map.m_len << inode->i_blkbits; | |
838 | } | |
839 | return ret; | |
840 | } | |
841 | ||
ccfb3000 | 842 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
843 | struct buffer_head *bh_result, int create, int flag, |
844 | pgoff_t *next_pgofs) | |
e2b4e2bc | 845 | { |
da85985c CY |
846 | return __get_data_block(inode, iblock, bh_result, create, |
847 | flag, next_pgofs); | |
e2b4e2bc CY |
848 | } |
849 | ||
850 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
851 | struct buffer_head *bh_result, int create) |
852 | { | |
e2b4e2bc | 853 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 854 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
855 | } |
856 | ||
e2b4e2bc | 857 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
858 | struct buffer_head *bh_result, int create) |
859 | { | |
179448bf | 860 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 861 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
862 | return -EFBIG; |
863 | ||
e2b4e2bc | 864 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 865 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
866 | } |
867 | ||
7f63eb77 JK |
868 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
869 | { | |
870 | return (offset >> inode->i_blkbits); | |
871 | } | |
872 | ||
873 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
874 | { | |
875 | return (blk << inode->i_blkbits); | |
876 | } | |
877 | ||
9ab70134 JK |
878 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
879 | u64 start, u64 len) | |
880 | { | |
7f63eb77 JK |
881 | struct buffer_head map_bh; |
882 | sector_t start_blk, last_blk; | |
da85985c | 883 | pgoff_t next_pgofs; |
de1475cc | 884 | loff_t isize; |
7f63eb77 JK |
885 | u64 logical = 0, phys = 0, size = 0; |
886 | u32 flags = 0; | |
7f63eb77 JK |
887 | int ret = 0; |
888 | ||
889 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
890 | if (ret) | |
891 | return ret; | |
892 | ||
67f8cf3c JK |
893 | if (f2fs_has_inline_data(inode)) { |
894 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
895 | if (ret != -EAGAIN) | |
896 | return ret; | |
897 | } | |
898 | ||
5955102c | 899 | inode_lock(inode); |
de1475cc FL |
900 | |
901 | isize = i_size_read(inode); | |
9a950d52 FL |
902 | if (start >= isize) |
903 | goto out; | |
7f63eb77 | 904 | |
9a950d52 FL |
905 | if (start + len > isize) |
906 | len = isize - start; | |
7f63eb77 JK |
907 | |
908 | if (logical_to_blk(inode, len) == 0) | |
909 | len = blk_to_logical(inode, 1); | |
910 | ||
911 | start_blk = logical_to_blk(inode, start); | |
912 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 913 | |
7f63eb77 JK |
914 | next: |
915 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
916 | map_bh.b_size = len; | |
917 | ||
e2b4e2bc | 918 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 919 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
920 | if (ret) |
921 | goto out; | |
922 | ||
923 | /* HOLE */ | |
924 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 925 | start_blk = next_pgofs; |
9a950d52 | 926 | /* Go through holes util pass the EOF */ |
da85985c | 927 | if (blk_to_logical(inode, start_blk) < isize) |
9a950d52 FL |
928 | goto prep_next; |
929 | /* Found a hole beyond isize means no more extents. | |
930 | * Note that the premise is that filesystems don't | |
931 | * punch holes beyond isize and keep size unchanged. | |
932 | */ | |
933 | flags |= FIEMAP_EXTENT_LAST; | |
934 | } | |
7f63eb77 | 935 | |
da5af127 CY |
936 | if (size) { |
937 | if (f2fs_encrypted_inode(inode)) | |
938 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
939 | ||
9a950d52 FL |
940 | ret = fiemap_fill_next_extent(fieinfo, logical, |
941 | phys, size, flags); | |
da5af127 | 942 | } |
7f63eb77 | 943 | |
9a950d52 FL |
944 | if (start_blk > last_blk || ret) |
945 | goto out; | |
7f63eb77 | 946 | |
9a950d52 FL |
947 | logical = blk_to_logical(inode, start_blk); |
948 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
949 | size = map_bh.b_size; | |
950 | flags = 0; | |
951 | if (buffer_unwritten(&map_bh)) | |
952 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 953 | |
9a950d52 | 954 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 955 | |
9a950d52 | 956 | prep_next: |
7f63eb77 JK |
957 | cond_resched(); |
958 | if (fatal_signal_pending(current)) | |
959 | ret = -EINTR; | |
960 | else | |
961 | goto next; | |
962 | out: | |
963 | if (ret == 1) | |
964 | ret = 0; | |
965 | ||
5955102c | 966 | inode_unlock(inode); |
7f63eb77 | 967 | return ret; |
9ab70134 JK |
968 | } |
969 | ||
78682f79 CY |
970 | struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
971 | unsigned nr_pages) | |
972 | { | |
973 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
974 | struct fscrypt_ctx *ctx = NULL; | |
975 | struct block_device *bdev = sbi->sb->s_bdev; | |
976 | struct bio *bio; | |
977 | ||
978 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
979 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
980 | if (IS_ERR(ctx)) | |
981 | return ERR_CAST(ctx); | |
982 | ||
983 | /* wait the page to be moved by cleaning */ | |
984 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
985 | } | |
986 | ||
987 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
988 | if (!bio) { | |
989 | if (ctx) | |
990 | fscrypt_release_ctx(ctx); | |
991 | return ERR_PTR(-ENOMEM); | |
992 | } | |
993 | bio->bi_bdev = bdev; | |
994 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blkaddr); | |
995 | bio->bi_end_io = f2fs_read_end_io; | |
996 | bio->bi_private = ctx; | |
997 | ||
998 | return bio; | |
999 | } | |
1000 | ||
f1e88660 JK |
1001 | /* |
1002 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1003 | * Major change was from block_size == page_size in f2fs by default. | |
1004 | */ | |
1005 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1006 | struct list_head *pages, struct page *page, | |
1007 | unsigned nr_pages) | |
1008 | { | |
1009 | struct bio *bio = NULL; | |
1010 | unsigned page_idx; | |
1011 | sector_t last_block_in_bio = 0; | |
1012 | struct inode *inode = mapping->host; | |
1013 | const unsigned blkbits = inode->i_blkbits; | |
1014 | const unsigned blocksize = 1 << blkbits; | |
1015 | sector_t block_in_file; | |
1016 | sector_t last_block; | |
1017 | sector_t last_block_in_file; | |
1018 | sector_t block_nr; | |
f1e88660 JK |
1019 | struct f2fs_map_blocks map; |
1020 | ||
1021 | map.m_pblk = 0; | |
1022 | map.m_lblk = 0; | |
1023 | map.m_len = 0; | |
1024 | map.m_flags = 0; | |
da85985c | 1025 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1026 | |
1027 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1028 | ||
1029 | prefetchw(&page->flags); | |
1030 | if (pages) { | |
1031 | page = list_entry(pages->prev, struct page, lru); | |
1032 | list_del(&page->lru); | |
1033 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1034 | page->index, |
1035 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1036 | goto next_page; |
1037 | } | |
1038 | ||
1039 | block_in_file = (sector_t)page->index; | |
1040 | last_block = block_in_file + nr_pages; | |
1041 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1042 | blkbits; | |
1043 | if (last_block > last_block_in_file) | |
1044 | last_block = last_block_in_file; | |
1045 | ||
1046 | /* | |
1047 | * Map blocks using the previous result first. | |
1048 | */ | |
1049 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1050 | block_in_file > map.m_lblk && | |
1051 | block_in_file < (map.m_lblk + map.m_len)) | |
1052 | goto got_it; | |
1053 | ||
1054 | /* | |
1055 | * Then do more f2fs_map_blocks() calls until we are | |
1056 | * done with this page. | |
1057 | */ | |
1058 | map.m_flags = 0; | |
1059 | ||
1060 | if (block_in_file < last_block) { | |
1061 | map.m_lblk = block_in_file; | |
1062 | map.m_len = last_block - block_in_file; | |
1063 | ||
46c9e141 | 1064 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1065 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1066 | goto set_error_page; |
1067 | } | |
1068 | got_it: | |
1069 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1070 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1071 | SetPageMappedToDisk(page); | |
1072 | ||
1073 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1074 | SetPageUptodate(page); | |
1075 | goto confused; | |
1076 | } | |
1077 | } else { | |
09cbfeaf | 1078 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
1079 | if (!PageUptodate(page)) |
1080 | SetPageUptodate(page); | |
f1e88660 JK |
1081 | unlock_page(page); |
1082 | goto next_page; | |
1083 | } | |
1084 | ||
1085 | /* | |
1086 | * This page will go to BIO. Do we need to send this | |
1087 | * BIO off first? | |
1088 | */ | |
1089 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
1090 | submit_and_realloc: | |
4fc29c1a | 1091 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1092 | bio = NULL; |
1093 | } | |
1094 | if (bio == NULL) { | |
78682f79 | 1095 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1d353eb7 JK |
1096 | if (IS_ERR(bio)) { |
1097 | bio = NULL; | |
f1e88660 | 1098 | goto set_error_page; |
4375a336 | 1099 | } |
04d328de | 1100 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1101 | } |
1102 | ||
1103 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1104 | goto submit_and_realloc; | |
1105 | ||
1106 | last_block_in_bio = block_nr; | |
1107 | goto next_page; | |
1108 | set_error_page: | |
1109 | SetPageError(page); | |
09cbfeaf | 1110 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1111 | unlock_page(page); |
1112 | goto next_page; | |
1113 | confused: | |
1114 | if (bio) { | |
4fc29c1a | 1115 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1116 | bio = NULL; |
1117 | } | |
1118 | unlock_page(page); | |
1119 | next_page: | |
1120 | if (pages) | |
09cbfeaf | 1121 | put_page(page); |
f1e88660 JK |
1122 | } |
1123 | BUG_ON(pages && !list_empty(pages)); | |
1124 | if (bio) | |
4fc29c1a | 1125 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1126 | return 0; |
1127 | } | |
1128 | ||
eb47b800 JK |
1129 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1130 | { | |
9ffe0fb5 | 1131 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1132 | int ret = -EAGAIN; |
9ffe0fb5 | 1133 | |
c20e89cd CY |
1134 | trace_f2fs_readpage(page, DATA); |
1135 | ||
e1c42045 | 1136 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1137 | if (f2fs_has_inline_data(inode)) |
1138 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1139 | if (ret == -EAGAIN) |
f1e88660 | 1140 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1141 | return ret; |
eb47b800 JK |
1142 | } |
1143 | ||
1144 | static int f2fs_read_data_pages(struct file *file, | |
1145 | struct address_space *mapping, | |
1146 | struct list_head *pages, unsigned nr_pages) | |
1147 | { | |
9ffe0fb5 | 1148 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1149 | struct page *page = list_entry(pages->prev, struct page, lru); |
1150 | ||
1151 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1152 | |
1153 | /* If the file has inline data, skip readpages */ | |
1154 | if (f2fs_has_inline_data(inode)) | |
1155 | return 0; | |
1156 | ||
f1e88660 | 1157 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1158 | } |
1159 | ||
05ca3632 | 1160 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1161 | { |
05ca3632 | 1162 | struct page *page = fio->page; |
eb47b800 | 1163 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1164 | struct dnode_of_data dn; |
1165 | int err = 0; | |
1166 | ||
1167 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1168 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1169 | if (err) |
1170 | return err; | |
1171 | ||
28bc106b | 1172 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1173 | |
1174 | /* This page is already truncated */ | |
7a9d7548 | 1175 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1176 | ClearPageUptodate(page); |
eb47b800 | 1177 | goto out_writepage; |
2bca1e23 | 1178 | } |
eb47b800 | 1179 | |
4375a336 | 1180 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1181 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1182 | |
1183 | /* wait for GCed encrypted page writeback */ | |
1184 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1185 | fio->old_blkaddr); |
b32e4482 JK |
1186 | retry_encrypt: |
1187 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1188 | gfp_flags); | |
4375a336 JK |
1189 | if (IS_ERR(fio->encrypted_page)) { |
1190 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1191 | if (err == -ENOMEM) { |
1192 | /* flush pending ios and wait for a while */ | |
1193 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1194 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1195 | gfp_flags |= __GFP_NOFAIL; | |
1196 | err = 0; | |
1197 | goto retry_encrypt; | |
1198 | } | |
4375a336 JK |
1199 | goto out_writepage; |
1200 | } | |
1201 | } | |
1202 | ||
eb47b800 JK |
1203 | set_page_writeback(page); |
1204 | ||
1205 | /* | |
1206 | * If current allocation needs SSR, | |
1207 | * it had better in-place writes for updated data. | |
1208 | */ | |
7a9d7548 | 1209 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1210 | !is_cold_data(page) && |
2da3e027 | 1211 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1212 | need_inplace_update(inode))) { |
05ca3632 | 1213 | rewrite_data_page(fio); |
91942321 | 1214 | set_inode_flag(inode, FI_UPDATE_WRITE); |
8ce67cb0 | 1215 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1216 | } else { |
05ca3632 | 1217 | write_data_page(&dn, fio); |
8ce67cb0 | 1218 | trace_f2fs_do_write_data_page(page, OPU); |
91942321 | 1219 | set_inode_flag(inode, FI_APPEND_WRITE); |
3c6c2beb | 1220 | if (page->index == 0) |
91942321 | 1221 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
eb47b800 JK |
1222 | } |
1223 | out_writepage: | |
1224 | f2fs_put_dnode(&dn); | |
1225 | return err; | |
1226 | } | |
1227 | ||
1228 | static int f2fs_write_data_page(struct page *page, | |
1229 | struct writeback_control *wbc) | |
1230 | { | |
1231 | struct inode *inode = page->mapping->host; | |
4081363f | 1232 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1233 | loff_t i_size = i_size_read(inode); |
1234 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1235 | >> PAGE_SHIFT; |
26de9b11 | 1236 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1237 | unsigned offset = 0; |
39936837 | 1238 | bool need_balance_fs = false; |
eb47b800 | 1239 | int err = 0; |
458e6197 | 1240 | struct f2fs_io_info fio = { |
05ca3632 | 1241 | .sbi = sbi, |
458e6197 | 1242 | .type = DATA, |
04d328de MC |
1243 | .op = REQ_OP_WRITE, |
1244 | .op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0, | |
05ca3632 | 1245 | .page = page, |
4375a336 | 1246 | .encrypted_page = NULL, |
458e6197 | 1247 | }; |
eb47b800 | 1248 | |
ecda0de3 CY |
1249 | trace_f2fs_writepage(page, DATA); |
1250 | ||
eb47b800 | 1251 | if (page->index < end_index) |
39936837 | 1252 | goto write; |
eb47b800 JK |
1253 | |
1254 | /* | |
1255 | * If the offset is out-of-range of file size, | |
1256 | * this page does not have to be written to disk. | |
1257 | */ | |
09cbfeaf | 1258 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1259 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1260 | goto out; |
eb47b800 | 1261 | |
09cbfeaf | 1262 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1263 | write: |
caf0047e | 1264 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1265 | goto redirty_out; |
1e84371f JK |
1266 | if (f2fs_is_drop_cache(inode)) |
1267 | goto out; | |
e6e5f561 JK |
1268 | /* we should not write 0'th page having journal header */ |
1269 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1270 | (!wbc->for_reclaim && | |
1271 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1272 | goto redirty_out; |
eb47b800 | 1273 | |
cf779cab JK |
1274 | /* we should bypass data pages to proceed the kworkder jobs */ |
1275 | if (unlikely(f2fs_cp_error(sbi))) { | |
7f319975 | 1276 | mapping_set_error(page->mapping, -EIO); |
a7ffdbe2 | 1277 | goto out; |
cf779cab JK |
1278 | } |
1279 | ||
39936837 | 1280 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1281 | if (S_ISDIR(inode->i_mode)) { |
05ca3632 | 1282 | err = do_write_data_page(&fio); |
8618b881 JK |
1283 | goto done; |
1284 | } | |
9ffe0fb5 | 1285 | |
8618b881 | 1286 | if (!wbc->for_reclaim) |
39936837 | 1287 | need_balance_fs = true; |
8618b881 | 1288 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1289 | goto redirty_out; |
eb47b800 | 1290 | |
b3d208f9 | 1291 | err = -EAGAIN; |
8618b881 | 1292 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1293 | if (f2fs_has_inline_data(inode)) |
1294 | err = f2fs_write_inline_data(inode, page); | |
1295 | if (err == -EAGAIN) | |
05ca3632 | 1296 | err = do_write_data_page(&fio); |
26de9b11 JK |
1297 | if (F2FS_I(inode)->last_disk_size < psize) |
1298 | F2FS_I(inode)->last_disk_size = psize; | |
8618b881 JK |
1299 | f2fs_unlock_op(sbi); |
1300 | done: | |
1301 | if (err && err != -ENOENT) | |
1302 | goto redirty_out; | |
eb47b800 | 1303 | |
eb47b800 | 1304 | clear_cold_data(page); |
39936837 | 1305 | out: |
a7ffdbe2 | 1306 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1307 | if (err) |
1308 | ClearPageUptodate(page); | |
0c3a5797 CY |
1309 | |
1310 | if (wbc->for_reclaim) { | |
1311 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1312 | remove_dirty_inode(inode); | |
1313 | } | |
1314 | ||
eb47b800 | 1315 | unlock_page(page); |
2c4db1a6 | 1316 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1317 | |
1318 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1319 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1320 | |
eb47b800 JK |
1321 | return 0; |
1322 | ||
eb47b800 | 1323 | redirty_out: |
76f60268 | 1324 | redirty_page_for_writepage(wbc, page); |
b230e6ca JK |
1325 | unlock_page(page); |
1326 | return err; | |
fa9150a8 NJ |
1327 | } |
1328 | ||
8f46dcae CY |
1329 | /* |
1330 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1331 | * The major change is making write step of cold data page separately from | |
1332 | * warm/hot data page. | |
1333 | */ | |
1334 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b230e6ca | 1335 | struct writeback_control *wbc) |
8f46dcae CY |
1336 | { |
1337 | int ret = 0; | |
1338 | int done = 0; | |
1339 | struct pagevec pvec; | |
1340 | int nr_pages; | |
1341 | pgoff_t uninitialized_var(writeback_index); | |
1342 | pgoff_t index; | |
1343 | pgoff_t end; /* Inclusive */ | |
1344 | pgoff_t done_index; | |
1345 | int cycled; | |
1346 | int range_whole = 0; | |
1347 | int tag; | |
8f46dcae CY |
1348 | |
1349 | pagevec_init(&pvec, 0); | |
46ae957f | 1350 | |
8f46dcae CY |
1351 | if (wbc->range_cyclic) { |
1352 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1353 | index = writeback_index; | |
1354 | if (index == 0) | |
1355 | cycled = 1; | |
1356 | else | |
1357 | cycled = 0; | |
1358 | end = -1; | |
1359 | } else { | |
09cbfeaf KS |
1360 | index = wbc->range_start >> PAGE_SHIFT; |
1361 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1362 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1363 | range_whole = 1; | |
1364 | cycled = 1; /* ignore range_cyclic tests */ | |
1365 | } | |
1366 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1367 | tag = PAGECACHE_TAG_TOWRITE; | |
1368 | else | |
1369 | tag = PAGECACHE_TAG_DIRTY; | |
1370 | retry: | |
1371 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1372 | tag_pages_for_writeback(mapping, index, end); | |
1373 | done_index = index; | |
1374 | while (!done && (index <= end)) { | |
1375 | int i; | |
1376 | ||
1377 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1378 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1379 | if (nr_pages == 0) | |
1380 | break; | |
1381 | ||
1382 | for (i = 0; i < nr_pages; i++) { | |
1383 | struct page *page = pvec.pages[i]; | |
1384 | ||
1385 | if (page->index > end) { | |
1386 | done = 1; | |
1387 | break; | |
1388 | } | |
1389 | ||
1390 | done_index = page->index; | |
1391 | ||
1392 | lock_page(page); | |
1393 | ||
1394 | if (unlikely(page->mapping != mapping)) { | |
1395 | continue_unlock: | |
1396 | unlock_page(page); | |
1397 | continue; | |
1398 | } | |
1399 | ||
1400 | if (!PageDirty(page)) { | |
1401 | /* someone wrote it for us */ | |
1402 | goto continue_unlock; | |
1403 | } | |
1404 | ||
8f46dcae CY |
1405 | if (PageWriteback(page)) { |
1406 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1407 | f2fs_wait_on_page_writeback(page, |
1408 | DATA, true); | |
8f46dcae CY |
1409 | else |
1410 | goto continue_unlock; | |
1411 | } | |
1412 | ||
1413 | BUG_ON(PageWriteback(page)); | |
1414 | if (!clear_page_dirty_for_io(page)) | |
1415 | goto continue_unlock; | |
1416 | ||
b230e6ca | 1417 | ret = mapping->a_ops->writepage(page, wbc); |
8f46dcae | 1418 | if (unlikely(ret)) { |
b230e6ca JK |
1419 | done_index = page->index + 1; |
1420 | done = 1; | |
1421 | break; | |
8f46dcae CY |
1422 | } |
1423 | ||
1424 | if (--wbc->nr_to_write <= 0 && | |
1425 | wbc->sync_mode == WB_SYNC_NONE) { | |
1426 | done = 1; | |
1427 | break; | |
1428 | } | |
1429 | } | |
1430 | pagevec_release(&pvec); | |
1431 | cond_resched(); | |
1432 | } | |
1433 | ||
8f46dcae CY |
1434 | if (!cycled && !done) { |
1435 | cycled = 1; | |
1436 | index = 0; | |
1437 | end = writeback_index - 1; | |
1438 | goto retry; | |
1439 | } | |
1440 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1441 | mapping->writeback_index = done_index; | |
1442 | ||
1443 | return ret; | |
1444 | } | |
1445 | ||
25ca923b | 1446 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1447 | struct writeback_control *wbc) |
1448 | { | |
1449 | struct inode *inode = mapping->host; | |
4081363f | 1450 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 1451 | struct blk_plug plug; |
eb47b800 | 1452 | int ret; |
eb47b800 | 1453 | |
cfb185a1 | 1454 | /* deal with chardevs and other special file */ |
1455 | if (!mapping->a_ops->writepage) | |
1456 | return 0; | |
1457 | ||
6a290544 CY |
1458 | /* skip writing if there is no dirty page in this inode */ |
1459 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1460 | return 0; | |
1461 | ||
a1257023 JK |
1462 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1463 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1464 | available_free_memory(sbi, DIRTY_DENTS)) | |
1465 | goto skip_write; | |
1466 | ||
d323d005 | 1467 | /* skip writing during file defragment */ |
91942321 | 1468 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
1469 | goto skip_write; |
1470 | ||
d5669f7b JK |
1471 | /* during POR, we don't need to trigger writepage at all. */ |
1472 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1473 | goto skip_write; | |
1474 | ||
d31c7c3f YH |
1475 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1476 | ||
9dfa1baf | 1477 | blk_start_plug(&plug); |
b230e6ca | 1478 | ret = f2fs_write_cache_pages(mapping, wbc); |
9dfa1baf | 1479 | blk_finish_plug(&plug); |
28ea6162 JK |
1480 | /* |
1481 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1482 | * to detect pending bios. | |
1483 | */ | |
1484 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
458e6197 | 1485 | |
c227f912 | 1486 | remove_dirty_inode(inode); |
eb47b800 | 1487 | return ret; |
d3baf95d JK |
1488 | |
1489 | skip_write: | |
a7ffdbe2 | 1490 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1491 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1492 | return 0; |
eb47b800 JK |
1493 | } |
1494 | ||
3aab8f82 CY |
1495 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1496 | { | |
1497 | struct inode *inode = mapping->host; | |
819d9153 | 1498 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1499 | |
819d9153 JK |
1500 | if (to > i_size) { |
1501 | truncate_pagecache(inode, i_size); | |
1502 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1503 | } |
1504 | } | |
1505 | ||
2aadac08 JK |
1506 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1507 | struct page *page, loff_t pos, unsigned len, | |
1508 | block_t *blk_addr, bool *node_changed) | |
1509 | { | |
1510 | struct inode *inode = page->mapping->host; | |
1511 | pgoff_t index = page->index; | |
1512 | struct dnode_of_data dn; | |
1513 | struct page *ipage; | |
b4d07a3e JK |
1514 | bool locked = false; |
1515 | struct extent_info ei; | |
2aadac08 JK |
1516 | int err = 0; |
1517 | ||
24b84912 JK |
1518 | /* |
1519 | * we already allocated all the blocks, so we don't need to get | |
1520 | * the block addresses when there is no need to fill the page. | |
1521 | */ | |
1522 | if (!f2fs_has_inline_data(inode) && !f2fs_encrypted_inode(inode) && | |
09cbfeaf | 1523 | len == PAGE_SIZE) |
24b84912 JK |
1524 | return 0; |
1525 | ||
b4d07a3e | 1526 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1527 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1528 | f2fs_lock_op(sbi); |
1529 | locked = true; | |
1530 | } | |
1531 | restart: | |
2aadac08 JK |
1532 | /* check inline_data */ |
1533 | ipage = get_node_page(sbi, inode->i_ino); | |
1534 | if (IS_ERR(ipage)) { | |
1535 | err = PTR_ERR(ipage); | |
1536 | goto unlock_out; | |
1537 | } | |
1538 | ||
1539 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1540 | ||
1541 | if (f2fs_has_inline_data(inode)) { | |
1542 | if (pos + len <= MAX_INLINE_DATA) { | |
1543 | read_inline_data(page, ipage); | |
91942321 | 1544 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
1545 | if (inode->i_nlink) |
1546 | set_inline_node(ipage); | |
2aadac08 JK |
1547 | } else { |
1548 | err = f2fs_convert_inline_page(&dn, page); | |
1549 | if (err) | |
b4d07a3e JK |
1550 | goto out; |
1551 | if (dn.data_blkaddr == NULL_ADDR) | |
1552 | err = f2fs_get_block(&dn, index); | |
1553 | } | |
1554 | } else if (locked) { | |
1555 | err = f2fs_get_block(&dn, index); | |
1556 | } else { | |
1557 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1558 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1559 | } else { | |
b4d07a3e JK |
1560 | /* hole case */ |
1561 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1562 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1563 | f2fs_put_dnode(&dn); |
1564 | f2fs_lock_op(sbi); | |
1565 | locked = true; | |
1566 | goto restart; | |
1567 | } | |
2aadac08 JK |
1568 | } |
1569 | } | |
b4d07a3e | 1570 | |
2aadac08 JK |
1571 | /* convert_inline_page can make node_changed */ |
1572 | *blk_addr = dn.data_blkaddr; | |
1573 | *node_changed = dn.node_changed; | |
b4d07a3e | 1574 | out: |
2aadac08 JK |
1575 | f2fs_put_dnode(&dn); |
1576 | unlock_out: | |
b4d07a3e JK |
1577 | if (locked) |
1578 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1579 | return err; |
1580 | } | |
1581 | ||
eb47b800 JK |
1582 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1583 | loff_t pos, unsigned len, unsigned flags, | |
1584 | struct page **pagep, void **fsdata) | |
1585 | { | |
1586 | struct inode *inode = mapping->host; | |
4081363f | 1587 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1588 | struct page *page = NULL; |
09cbfeaf | 1589 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1590 | bool need_balance = false; |
1591 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1592 | int err = 0; |
1593 | ||
62aed044 CY |
1594 | trace_f2fs_write_begin(inode, pos, len, flags); |
1595 | ||
5f727395 JK |
1596 | /* |
1597 | * We should check this at this moment to avoid deadlock on inode page | |
1598 | * and #0 page. The locking rule for inline_data conversion should be: | |
1599 | * lock_page(page #0) -> lock_page(inode_page) | |
1600 | */ | |
1601 | if (index != 0) { | |
1602 | err = f2fs_convert_inline_inode(inode); | |
1603 | if (err) | |
1604 | goto fail; | |
1605 | } | |
afcb7ca0 | 1606 | repeat: |
eb47b800 | 1607 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1608 | if (!page) { |
1609 | err = -ENOMEM; | |
1610 | goto fail; | |
1611 | } | |
d5f66990 | 1612 | |
eb47b800 JK |
1613 | *pagep = page; |
1614 | ||
2aadac08 JK |
1615 | err = prepare_write_begin(sbi, page, pos, len, |
1616 | &blkaddr, &need_balance); | |
9ba69cf9 | 1617 | if (err) |
2aadac08 | 1618 | goto fail; |
9ba69cf9 | 1619 | |
2aadac08 | 1620 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 | 1621 | unlock_page(page); |
2c4db1a6 | 1622 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1623 | lock_page(page); |
1624 | if (page->mapping != mapping) { | |
1625 | /* The page got truncated from under us */ | |
1626 | f2fs_put_page(page, 1); | |
1627 | goto repeat; | |
1628 | } | |
1629 | } | |
1630 | ||
fec1d657 | 1631 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1632 | |
08b39fbd CY |
1633 | /* wait for GCed encrypted page writeback */ |
1634 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1635 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1636 | |
09cbfeaf | 1637 | if (len == PAGE_SIZE) |
90d4388a CY |
1638 | goto out_update; |
1639 | if (PageUptodate(page)) | |
1640 | goto out_clear; | |
eb47b800 | 1641 | |
09cbfeaf KS |
1642 | if ((pos & PAGE_MASK) >= i_size_read(inode)) { |
1643 | unsigned start = pos & (PAGE_SIZE - 1); | |
eb47b800 JK |
1644 | unsigned end = start + len; |
1645 | ||
1646 | /* Reading beyond i_size is simple: memset to zero */ | |
09cbfeaf | 1647 | zero_user_segments(page, 0, start, end, PAGE_SIZE); |
90d4388a | 1648 | goto out_update; |
eb47b800 JK |
1649 | } |
1650 | ||
2aadac08 | 1651 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1652 | zero_user_segment(page, 0, PAGE_SIZE); |
eb47b800 | 1653 | } else { |
78682f79 | 1654 | struct bio *bio; |
d54c795b | 1655 | |
78682f79 CY |
1656 | bio = f2fs_grab_bio(inode, blkaddr, 1); |
1657 | if (IS_ERR(bio)) { | |
1658 | err = PTR_ERR(bio); | |
3aab8f82 | 1659 | goto fail; |
eb47b800 | 1660 | } |
4fc29c1a | 1661 | bio_set_op_attrs(bio, REQ_OP_READ, READ_SYNC); |
78682f79 CY |
1662 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
1663 | bio_put(bio); | |
1664 | err = -EFAULT; | |
1665 | goto fail; | |
1666 | } | |
1667 | ||
4fc29c1a | 1668 | __submit_bio(sbi, bio, DATA); |
d54c795b | 1669 | |
393ff91f | 1670 | lock_page(page); |
6bacf52f | 1671 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1672 | f2fs_put_page(page, 1); |
1673 | goto repeat; | |
eb47b800 | 1674 | } |
1563ac75 CY |
1675 | if (unlikely(!PageUptodate(page))) { |
1676 | err = -EIO; | |
1677 | goto fail; | |
4375a336 | 1678 | } |
eb47b800 | 1679 | } |
90d4388a | 1680 | out_update: |
237c0790 JK |
1681 | if (!PageUptodate(page)) |
1682 | SetPageUptodate(page); | |
90d4388a | 1683 | out_clear: |
eb47b800 JK |
1684 | clear_cold_data(page); |
1685 | return 0; | |
9ba69cf9 | 1686 | |
3aab8f82 | 1687 | fail: |
86531d6b | 1688 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1689 | f2fs_write_failed(mapping, pos + len); |
1690 | return err; | |
eb47b800 JK |
1691 | } |
1692 | ||
a1dd3c13 JK |
1693 | static int f2fs_write_end(struct file *file, |
1694 | struct address_space *mapping, | |
1695 | loff_t pos, unsigned len, unsigned copied, | |
1696 | struct page *page, void *fsdata) | |
1697 | { | |
1698 | struct inode *inode = page->mapping->host; | |
1699 | ||
dfb2bf38 CY |
1700 | trace_f2fs_write_end(inode, pos, len, copied); |
1701 | ||
34ba94ba | 1702 | set_page_dirty(page); |
a2ee0a30 | 1703 | f2fs_put_page(page, 1); |
a1dd3c13 | 1704 | |
fc9581c8 JK |
1705 | if (pos + copied > i_size_read(inode)) |
1706 | f2fs_i_size_write(inode, pos + copied); | |
a1dd3c13 | 1707 | |
d0239e1b | 1708 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1709 | return copied; |
1710 | } | |
1711 | ||
6f673763 OS |
1712 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1713 | loff_t offset) | |
944fcfc1 JK |
1714 | { |
1715 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1716 | |
944fcfc1 JK |
1717 | if (offset & blocksize_mask) |
1718 | return -EINVAL; | |
1719 | ||
5b46f25d AV |
1720 | if (iov_iter_alignment(iter) & blocksize_mask) |
1721 | return -EINVAL; | |
1722 | ||
944fcfc1 JK |
1723 | return 0; |
1724 | } | |
1725 | ||
c8b8e32d | 1726 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 1727 | { |
b439b103 | 1728 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1729 | struct inode *inode = mapping->host; |
1730 | size_t count = iov_iter_count(iter); | |
c8b8e32d | 1731 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 1732 | int rw = iov_iter_rw(iter); |
3aab8f82 | 1733 | int err; |
944fcfc1 | 1734 | |
b439b103 | 1735 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1736 | if (err) |
1737 | return err; | |
9ffe0fb5 | 1738 | |
fcc85a4d JK |
1739 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1740 | return 0; | |
36abef4e JK |
1741 | if (test_opt(F2FS_I_SB(inode), LFS)) |
1742 | return 0; | |
fcc85a4d | 1743 | |
5302fb00 | 1744 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 1745 | |
82e0a5aa | 1746 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
c8b8e32d | 1747 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
82e0a5aa CY |
1748 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
1749 | ||
1750 | if (rw == WRITE) { | |
6bfc4919 | 1751 | if (err > 0) |
91942321 | 1752 | set_inode_flag(inode, FI_UPDATE_WRITE); |
6bfc4919 JK |
1753 | else if (err < 0) |
1754 | f2fs_write_failed(mapping, offset + count); | |
1755 | } | |
70407fad | 1756 | |
5302fb00 | 1757 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 1758 | |
3aab8f82 | 1759 | return err; |
eb47b800 JK |
1760 | } |
1761 | ||
487261f3 CY |
1762 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1763 | unsigned int length) | |
eb47b800 JK |
1764 | { |
1765 | struct inode *inode = page->mapping->host; | |
487261f3 | 1766 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1767 | |
487261f3 | 1768 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1769 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1770 | return; |
1771 | ||
487261f3 CY |
1772 | if (PageDirty(page)) { |
1773 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1774 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1775 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1776 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1777 | else | |
1778 | inode_dec_dirty_pages(inode); | |
1779 | } | |
decd36b6 CY |
1780 | |
1781 | /* This is atomic written page, keep Private */ | |
1782 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1783 | return; | |
1784 | ||
23dc974e | 1785 | set_page_private(page, 0); |
eb47b800 JK |
1786 | ClearPagePrivate(page); |
1787 | } | |
1788 | ||
487261f3 | 1789 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1790 | { |
f68daeeb JK |
1791 | /* If this is dirty page, keep PagePrivate */ |
1792 | if (PageDirty(page)) | |
1793 | return 0; | |
1794 | ||
decd36b6 CY |
1795 | /* This is atomic written page, keep Private */ |
1796 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1797 | return 0; | |
1798 | ||
23dc974e | 1799 | set_page_private(page, 0); |
eb47b800 | 1800 | ClearPagePrivate(page); |
c3850aa1 | 1801 | return 1; |
eb47b800 JK |
1802 | } |
1803 | ||
fe76b796 JK |
1804 | /* |
1805 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
1806 | * in very high speed storages. (e.g., pmem) | |
1807 | */ | |
1808 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
1809 | { | |
1810 | struct address_space *mapping = page->mapping; | |
1811 | unsigned long flags; | |
1812 | ||
1813 | if (unlikely(!mapping)) | |
1814 | return; | |
1815 | ||
1816 | spin_lock(&mapping->private_lock); | |
1817 | lock_page_memcg(page); | |
1818 | SetPageDirty(page); | |
1819 | spin_unlock(&mapping->private_lock); | |
1820 | ||
1821 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
1822 | WARN_ON_ONCE(!PageUptodate(page)); | |
1823 | account_page_dirtied(page, mapping); | |
1824 | radix_tree_tag_set(&mapping->page_tree, | |
1825 | page_index(page), PAGECACHE_TAG_DIRTY); | |
1826 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
1827 | unlock_page_memcg(page); | |
1828 | ||
1829 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
1830 | return; | |
1831 | } | |
1832 | ||
eb47b800 JK |
1833 | static int f2fs_set_data_page_dirty(struct page *page) |
1834 | { | |
1835 | struct address_space *mapping = page->mapping; | |
1836 | struct inode *inode = mapping->host; | |
1837 | ||
26c6b887 JK |
1838 | trace_f2fs_set_page_dirty(page, DATA); |
1839 | ||
237c0790 JK |
1840 | if (!PageUptodate(page)) |
1841 | SetPageUptodate(page); | |
34ba94ba | 1842 | |
1e84371f | 1843 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1844 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1845 | register_inmem_page(inode, page); | |
1846 | return 1; | |
1847 | } | |
1848 | /* | |
1849 | * Previously, this page has been registered, we just | |
1850 | * return here. | |
1851 | */ | |
1852 | return 0; | |
34ba94ba JK |
1853 | } |
1854 | ||
eb47b800 | 1855 | if (!PageDirty(page)) { |
fe76b796 | 1856 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 1857 | update_dirty_page(inode, page); |
eb47b800 JK |
1858 | return 1; |
1859 | } | |
1860 | return 0; | |
1861 | } | |
1862 | ||
c01e54b7 JK |
1863 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1864 | { | |
454ae7e5 CY |
1865 | struct inode *inode = mapping->host; |
1866 | ||
1d373a0e JK |
1867 | if (f2fs_has_inline_data(inode)) |
1868 | return 0; | |
1869 | ||
1870 | /* make sure allocating whole blocks */ | |
1871 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1872 | filemap_write_and_wait(mapping); | |
1873 | ||
e2b4e2bc | 1874 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1875 | } |
1876 | ||
eb47b800 JK |
1877 | const struct address_space_operations f2fs_dblock_aops = { |
1878 | .readpage = f2fs_read_data_page, | |
1879 | .readpages = f2fs_read_data_pages, | |
1880 | .writepage = f2fs_write_data_page, | |
1881 | .writepages = f2fs_write_data_pages, | |
1882 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1883 | .write_end = f2fs_write_end, |
eb47b800 | 1884 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1885 | .invalidatepage = f2fs_invalidate_page, |
1886 | .releasepage = f2fs_release_page, | |
eb47b800 | 1887 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1888 | .bmap = f2fs_bmap, |
eb47b800 | 1889 | }; |