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> |
f1e88660 | 22 | #include <linux/cleancache.h> |
eb47b800 JK |
23 | |
24 | #include "f2fs.h" | |
25 | #include "node.h" | |
26 | #include "segment.h" | |
db9f7c1a | 27 | #include "trace.h" |
848753aa | 28 | #include <trace/events/f2fs.h> |
eb47b800 | 29 | |
4246a0b6 | 30 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 31 | { |
f568849e LT |
32 | struct bio_vec *bvec; |
33 | int i; | |
93dfe2ac | 34 | |
4375a336 | 35 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 36 | if (bio->bi_error) { |
0b81d077 | 37 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 38 | } else { |
0b81d077 | 39 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
40 | return; |
41 | } | |
42 | } | |
43 | ||
12377024 CY |
44 | bio_for_each_segment_all(bvec, bio, i) { |
45 | struct page *page = bvec->bv_page; | |
f1e88660 | 46 | |
4246a0b6 | 47 | if (!bio->bi_error) { |
f1e88660 JK |
48 | SetPageUptodate(page); |
49 | } else { | |
50 | ClearPageUptodate(page); | |
51 | SetPageError(page); | |
52 | } | |
53 | unlock_page(page); | |
54 | } | |
f1e88660 JK |
55 | bio_put(bio); |
56 | } | |
57 | ||
4246a0b6 | 58 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 59 | { |
1b1f559f | 60 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
61 | struct bio_vec *bvec; |
62 | int i; | |
93dfe2ac | 63 | |
f568849e | 64 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
65 | struct page *page = bvec->bv_page; |
66 | ||
0b81d077 | 67 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 68 | |
4246a0b6 | 69 | if (unlikely(bio->bi_error)) { |
93dfe2ac | 70 | set_bit(AS_EIO, &page->mapping->flags); |
38f91ca8 | 71 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac JK |
72 | } |
73 | end_page_writeback(page); | |
f568849e | 74 | } |
f5730184 JK |
75 | if (atomic_dec_and_test(&sbi->nr_wb_bios) && |
76 | wq_has_sleeper(&sbi->cp_wait)) | |
93dfe2ac JK |
77 | wake_up(&sbi->cp_wait); |
78 | ||
79 | bio_put(bio); | |
80 | } | |
81 | ||
940a6d34 GZ |
82 | /* |
83 | * Low-level block read/write IO operations. | |
84 | */ | |
85 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
86 | int npages, bool is_read) | |
87 | { | |
88 | struct bio *bio; | |
89 | ||
740432f8 | 90 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
91 | |
92 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 93 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 94 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 95 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
96 | |
97 | return bio; | |
98 | } | |
99 | ||
04d328de | 100 | static inline void __submit_bio(struct f2fs_sb_info *sbi, struct bio *bio) |
f5730184 | 101 | { |
04d328de | 102 | if (!is_read_io(bio_op(bio))) |
f5730184 | 103 | atomic_inc(&sbi->nr_wb_bios); |
4e49ea4a | 104 | submit_bio(bio); |
f5730184 JK |
105 | } |
106 | ||
458e6197 | 107 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 108 | { |
458e6197 | 109 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
110 | |
111 | if (!io->bio) | |
112 | return; | |
113 | ||
04d328de | 114 | if (is_read_io(fio->op)) |
2ace38e0 | 115 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 116 | else |
2ace38e0 | 117 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 118 | |
04d328de MC |
119 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
120 | ||
121 | __submit_bio(io->sbi, io->bio); | |
93dfe2ac JK |
122 | io->bio = NULL; |
123 | } | |
124 | ||
0c3a5797 CY |
125 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
126 | struct page *page, nid_t ino) | |
0fd785eb | 127 | { |
0fd785eb CY |
128 | struct bio_vec *bvec; |
129 | struct page *target; | |
130 | int i; | |
131 | ||
0c3a5797 | 132 | if (!io->bio) |
0fd785eb | 133 | return false; |
0c3a5797 CY |
134 | |
135 | if (!inode && !page && !ino) | |
136 | return true; | |
0fd785eb CY |
137 | |
138 | bio_for_each_segment_all(bvec, io->bio, i) { | |
139 | ||
0b81d077 | 140 | if (bvec->bv_page->mapping) |
0fd785eb | 141 | target = bvec->bv_page; |
0b81d077 JK |
142 | else |
143 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 144 | |
0c3a5797 CY |
145 | if (inode && inode == target->mapping->host) |
146 | return true; | |
147 | if (page && page == target) | |
148 | return true; | |
149 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 150 | return true; |
0fd785eb CY |
151 | } |
152 | ||
0fd785eb CY |
153 | return false; |
154 | } | |
155 | ||
0c3a5797 CY |
156 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
157 | struct page *page, nid_t ino, | |
158 | enum page_type type) | |
159 | { | |
160 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
161 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
162 | bool ret; | |
163 | ||
164 | down_read(&io->io_rwsem); | |
165 | ret = __has_merged_page(io, inode, page, ino); | |
166 | up_read(&io->io_rwsem); | |
167 | return ret; | |
168 | } | |
169 | ||
170 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
171 | struct inode *inode, struct page *page, | |
172 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
173 | { |
174 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
175 | struct f2fs_bio_info *io; | |
176 | ||
177 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
178 | ||
df0f8dc0 | 179 | down_write(&io->io_rwsem); |
458e6197 | 180 | |
0c3a5797 CY |
181 | if (!__has_merged_page(io, inode, page, ino)) |
182 | goto out; | |
183 | ||
458e6197 JK |
184 | /* change META to META_FLUSH in the checkpoint procedure */ |
185 | if (type >= META_FLUSH) { | |
186 | io->fio.type = META_FLUSH; | |
04d328de | 187 | io->fio.op = REQ_OP_WRITE; |
0f7b2abd | 188 | if (test_opt(sbi, NOBARRIER)) |
04d328de | 189 | io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO; |
0f7b2abd | 190 | else |
04d328de MC |
191 | io->fio.op_flags = WRITE_FLUSH_FUA | REQ_META | |
192 | REQ_PRIO; | |
458e6197 JK |
193 | } |
194 | __submit_merged_bio(io); | |
0c3a5797 | 195 | out: |
df0f8dc0 | 196 | up_write(&io->io_rwsem); |
93dfe2ac JK |
197 | } |
198 | ||
0c3a5797 CY |
199 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
200 | int rw) | |
201 | { | |
202 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
203 | } | |
204 | ||
205 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
206 | struct inode *inode, struct page *page, | |
207 | nid_t ino, enum page_type type, int rw) | |
208 | { | |
209 | if (has_merged_page(sbi, inode, page, ino, type)) | |
210 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
211 | } | |
212 | ||
406657dd CY |
213 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
214 | { | |
215 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
216 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
217 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
218 | } | |
219 | ||
93dfe2ac JK |
220 | /* |
221 | * Fill the locked page with data located in the block address. | |
222 | * Return unlocked page. | |
223 | */ | |
05ca3632 | 224 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 225 | { |
93dfe2ac | 226 | struct bio *bio; |
0b81d077 JK |
227 | struct page *page = fio->encrypted_page ? |
228 | fio->encrypted_page : fio->page; | |
93dfe2ac | 229 | |
2ace38e0 | 230 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 231 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
232 | |
233 | /* Allocate a new bio */ | |
04d328de | 234 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 235 | |
09cbfeaf | 236 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 237 | bio_put(bio); |
93dfe2ac JK |
238 | return -EFAULT; |
239 | } | |
04d328de MC |
240 | bio->bi_rw = fio->op_flags; |
241 | bio_set_op_attrs(bio, fio->op, fio->op_flags); | |
93dfe2ac | 242 | |
04d328de | 243 | __submit_bio(fio->sbi, bio); |
93dfe2ac JK |
244 | return 0; |
245 | } | |
246 | ||
05ca3632 | 247 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 248 | { |
05ca3632 | 249 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 250 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 251 | struct f2fs_bio_info *io; |
04d328de | 252 | bool is_read = is_read_io(fio->op); |
4375a336 | 253 | struct page *bio_page; |
93dfe2ac | 254 | |
940a6d34 | 255 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 256 | |
7a9d7548 CY |
257 | if (fio->old_blkaddr != NEW_ADDR) |
258 | verify_block_addr(sbi, fio->old_blkaddr); | |
259 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 260 | |
df0f8dc0 | 261 | down_write(&io->io_rwsem); |
93dfe2ac | 262 | |
7a9d7548 | 263 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
04d328de | 264 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags))) |
458e6197 | 265 | __submit_merged_bio(io); |
93dfe2ac JK |
266 | alloc_new: |
267 | if (io->bio == NULL) { | |
90a893c7 | 268 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 269 | |
7a9d7548 CY |
270 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
271 | bio_blocks, is_read); | |
458e6197 | 272 | io->fio = *fio; |
93dfe2ac JK |
273 | } |
274 | ||
4375a336 JK |
275 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
276 | ||
09cbfeaf KS |
277 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
278 | PAGE_SIZE) { | |
458e6197 | 279 | __submit_merged_bio(io); |
93dfe2ac JK |
280 | goto alloc_new; |
281 | } | |
282 | ||
7a9d7548 | 283 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 284 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 285 | |
df0f8dc0 | 286 | up_write(&io->io_rwsem); |
05ca3632 | 287 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
288 | } |
289 | ||
46008c6d CY |
290 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
291 | { | |
292 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
293 | __le32 *addr_array; | |
294 | ||
295 | /* Get physical address of data block */ | |
296 | addr_array = blkaddr_in_node(rn); | |
297 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
298 | } | |
299 | ||
0a8165d7 | 300 | /* |
eb47b800 JK |
301 | * Lock ordering for the change of data block address: |
302 | * ->data_page | |
303 | * ->node_page | |
304 | * update block addresses in the node page | |
305 | */ | |
216a620a | 306 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 307 | { |
46008c6d CY |
308 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
309 | __set_data_blkaddr(dn); | |
310 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 311 | dn->node_changed = true; |
eb47b800 JK |
312 | } |
313 | ||
f28b3434 CY |
314 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
315 | { | |
316 | dn->data_blkaddr = blkaddr; | |
317 | set_data_blkaddr(dn); | |
318 | f2fs_update_extent_cache(dn); | |
319 | } | |
320 | ||
46008c6d CY |
321 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
322 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 323 | { |
4081363f | 324 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 325 | |
46008c6d CY |
326 | if (!count) |
327 | return 0; | |
328 | ||
6bacf52f | 329 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 330 | return -EPERM; |
46008c6d | 331 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
332 | return -ENOSPC; |
333 | ||
46008c6d CY |
334 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
335 | dn->ofs_in_node, count); | |
336 | ||
337 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
338 | ||
339 | for (; count > 0; dn->ofs_in_node++) { | |
340 | block_t blkaddr = | |
341 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
342 | if (blkaddr == NULL_ADDR) { | |
343 | dn->data_blkaddr = NEW_ADDR; | |
344 | __set_data_blkaddr(dn); | |
345 | count--; | |
346 | } | |
347 | } | |
348 | ||
349 | if (set_page_dirty(dn->node_page)) | |
350 | dn->node_changed = true; | |
c01e2853 | 351 | |
a18ff063 | 352 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
353 | sync_inode_page(dn); |
354 | return 0; | |
355 | } | |
356 | ||
46008c6d CY |
357 | /* Should keep dn->ofs_in_node unchanged */ |
358 | int reserve_new_block(struct dnode_of_data *dn) | |
359 | { | |
360 | unsigned int ofs_in_node = dn->ofs_in_node; | |
361 | int ret; | |
362 | ||
363 | ret = reserve_new_blocks(dn, 1); | |
364 | dn->ofs_in_node = ofs_in_node; | |
365 | return ret; | |
366 | } | |
367 | ||
b600965c HL |
368 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
369 | { | |
370 | bool need_put = dn->inode_page ? false : true; | |
371 | int err; | |
372 | ||
373 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
374 | if (err) | |
375 | return err; | |
a8865372 | 376 | |
b600965c HL |
377 | if (dn->data_blkaddr == NULL_ADDR) |
378 | err = reserve_new_block(dn); | |
a8865372 | 379 | if (err || need_put) |
b600965c HL |
380 | f2fs_put_dnode(dn); |
381 | return err; | |
382 | } | |
383 | ||
759af1c9 | 384 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 385 | { |
028a41e8 | 386 | struct extent_info ei; |
759af1c9 | 387 | struct inode *inode = dn->inode; |
028a41e8 | 388 | |
759af1c9 FL |
389 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
390 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
391 | return 0; | |
429511cd | 392 | } |
028a41e8 | 393 | |
759af1c9 | 394 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
395 | } |
396 | ||
a56c7c6f | 397 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 398 | int op_flags, bool for_write) |
eb47b800 | 399 | { |
eb47b800 JK |
400 | struct address_space *mapping = inode->i_mapping; |
401 | struct dnode_of_data dn; | |
402 | struct page *page; | |
cb3bc9ee | 403 | struct extent_info ei; |
eb47b800 | 404 | int err; |
cf04e8eb | 405 | struct f2fs_io_info fio = { |
05ca3632 | 406 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 407 | .type = DATA, |
04d328de MC |
408 | .op = REQ_OP_READ, |
409 | .op_flags = op_flags, | |
4375a336 | 410 | .encrypted_page = NULL, |
cf04e8eb | 411 | }; |
eb47b800 | 412 | |
4375a336 JK |
413 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
414 | return read_mapping_page(mapping, index, NULL); | |
415 | ||
a56c7c6f | 416 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
417 | if (!page) |
418 | return ERR_PTR(-ENOMEM); | |
419 | ||
cb3bc9ee CY |
420 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
421 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
422 | goto got_it; | |
423 | } | |
424 | ||
eb47b800 | 425 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 426 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
427 | if (err) |
428 | goto put_err; | |
eb47b800 JK |
429 | f2fs_put_dnode(&dn); |
430 | ||
6bacf52f | 431 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
432 | err = -ENOENT; |
433 | goto put_err; | |
650495de | 434 | } |
cb3bc9ee | 435 | got_it: |
43f3eae1 JK |
436 | if (PageUptodate(page)) { |
437 | unlock_page(page); | |
eb47b800 | 438 | return page; |
43f3eae1 | 439 | } |
eb47b800 | 440 | |
d59ff4df JK |
441 | /* |
442 | * A new dentry page is allocated but not able to be written, since its | |
443 | * new inode page couldn't be allocated due to -ENOSPC. | |
444 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
445 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
446 | */ | |
447 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 448 | zero_user_segment(page, 0, PAGE_SIZE); |
d59ff4df | 449 | SetPageUptodate(page); |
43f3eae1 | 450 | unlock_page(page); |
d59ff4df JK |
451 | return page; |
452 | } | |
eb47b800 | 453 | |
7a9d7548 | 454 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
455 | fio.page = page; |
456 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 457 | if (err) |
86531d6b | 458 | goto put_err; |
43f3eae1 | 459 | return page; |
86531d6b JK |
460 | |
461 | put_err: | |
462 | f2fs_put_page(page, 1); | |
463 | return ERR_PTR(err); | |
43f3eae1 JK |
464 | } |
465 | ||
466 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
467 | { | |
468 | struct address_space *mapping = inode->i_mapping; | |
469 | struct page *page; | |
470 | ||
471 | page = find_get_page(mapping, index); | |
472 | if (page && PageUptodate(page)) | |
473 | return page; | |
474 | f2fs_put_page(page, 0); | |
475 | ||
a56c7c6f | 476 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
477 | if (IS_ERR(page)) |
478 | return page; | |
479 | ||
480 | if (PageUptodate(page)) | |
481 | return page; | |
482 | ||
483 | wait_on_page_locked(page); | |
484 | if (unlikely(!PageUptodate(page))) { | |
485 | f2fs_put_page(page, 0); | |
486 | return ERR_PTR(-EIO); | |
487 | } | |
488 | return page; | |
489 | } | |
490 | ||
491 | /* | |
492 | * If it tries to access a hole, return an error. | |
493 | * Because, the callers, functions in dir.c and GC, should be able to know | |
494 | * whether this page exists or not. | |
495 | */ | |
a56c7c6f JK |
496 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
497 | bool for_write) | |
43f3eae1 JK |
498 | { |
499 | struct address_space *mapping = inode->i_mapping; | |
500 | struct page *page; | |
501 | repeat: | |
a56c7c6f | 502 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
503 | if (IS_ERR(page)) |
504 | return page; | |
393ff91f | 505 | |
43f3eae1 | 506 | /* wait for read completion */ |
393ff91f | 507 | lock_page(page); |
6bacf52f | 508 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
509 | f2fs_put_page(page, 1); |
510 | return ERR_PTR(-EIO); | |
eb47b800 | 511 | } |
6bacf52f | 512 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
513 | f2fs_put_page(page, 1); |
514 | goto repeat; | |
eb47b800 JK |
515 | } |
516 | return page; | |
517 | } | |
518 | ||
0a8165d7 | 519 | /* |
eb47b800 JK |
520 | * Caller ensures that this data page is never allocated. |
521 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 522 | * |
4f4124d0 CY |
523 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
524 | * f2fs_unlock_op(). | |
470f00e9 CY |
525 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
526 | * ipage should be released by this function. | |
eb47b800 | 527 | */ |
64aa7ed9 | 528 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 529 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 530 | { |
eb47b800 JK |
531 | struct address_space *mapping = inode->i_mapping; |
532 | struct page *page; | |
533 | struct dnode_of_data dn; | |
534 | int err; | |
7612118a | 535 | |
a56c7c6f | 536 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
537 | if (!page) { |
538 | /* | |
539 | * before exiting, we should make sure ipage will be released | |
540 | * if any error occur. | |
541 | */ | |
542 | f2fs_put_page(ipage, 1); | |
01f28610 | 543 | return ERR_PTR(-ENOMEM); |
470f00e9 | 544 | } |
eb47b800 | 545 | |
a8865372 | 546 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 547 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
548 | if (err) { |
549 | f2fs_put_page(page, 1); | |
eb47b800 | 550 | return ERR_PTR(err); |
a8865372 | 551 | } |
01f28610 JK |
552 | if (!ipage) |
553 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
554 | |
555 | if (PageUptodate(page)) | |
01f28610 | 556 | goto got_it; |
eb47b800 JK |
557 | |
558 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 559 | zero_user_segment(page, 0, PAGE_SIZE); |
393ff91f | 560 | SetPageUptodate(page); |
eb47b800 | 561 | } else { |
4375a336 | 562 | f2fs_put_page(page, 1); |
a8865372 | 563 | |
7612118a JK |
564 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
565 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
566 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 567 | if (IS_ERR(page)) |
7612118a | 568 | return page; |
eb47b800 | 569 | } |
01f28610 | 570 | got_it: |
9edcdabf | 571 | if (new_i_size && i_size_read(inode) < |
09cbfeaf KS |
572 | ((loff_t)(index + 1) << PAGE_SHIFT)) { |
573 | i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); | |
699489bb JK |
574 | /* Only the directory inode sets new_i_size */ |
575 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
576 | } |
577 | return page; | |
578 | } | |
579 | ||
bfad7c2d JK |
580 | static int __allocate_data_block(struct dnode_of_data *dn) |
581 | { | |
4081363f | 582 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 583 | struct f2fs_summary sum; |
bfad7c2d | 584 | struct node_info ni; |
38aa0889 | 585 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 586 | pgoff_t fofs; |
46008c6d | 587 | blkcnt_t count = 1; |
bfad7c2d JK |
588 | |
589 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
590 | return -EPERM; | |
df6136ef CY |
591 | |
592 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
593 | if (dn->data_blkaddr == NEW_ADDR) | |
594 | goto alloc; | |
595 | ||
46008c6d | 596 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
597 | return -ENOSPC; |
598 | ||
df6136ef | 599 | alloc: |
bfad7c2d JK |
600 | get_node_info(sbi, dn->nid, &ni); |
601 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
602 | ||
38aa0889 JK |
603 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
604 | seg = CURSEG_DIRECT_IO; | |
605 | ||
df6136ef CY |
606 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
607 | &sum, seg); | |
216a620a | 608 | set_data_blkaddr(dn); |
bfad7c2d | 609 | |
976e4c50 | 610 | /* update i_size */ |
81ca7350 | 611 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 612 | dn->ofs_in_node; |
09cbfeaf | 613 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
9edcdabf | 614 | i_size_write(dn->inode, |
09cbfeaf | 615 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
616 | return 0; |
617 | } | |
618 | ||
b439b103 | 619 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 620 | { |
b439b103 | 621 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 622 | struct f2fs_map_blocks map; |
b439b103 | 623 | ssize_t ret = 0; |
59b802e5 | 624 | |
0080c507 JK |
625 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
626 | map.m_len = F2FS_BYTES_TO_BLK(iov_iter_count(from)); | |
da85985c | 627 | map.m_next_pgofs = NULL; |
2a340760 | 628 | |
24b84912 JK |
629 | if (f2fs_encrypted_inode(inode)) |
630 | return 0; | |
631 | ||
632 | if (iocb->ki_flags & IOCB_DIRECT) { | |
633 | ret = f2fs_convert_inline_inode(inode); | |
634 | if (ret) | |
635 | return ret; | |
636 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); | |
637 | } | |
638 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
b439b103 JK |
639 | ret = f2fs_convert_inline_inode(inode); |
640 | if (ret) | |
641 | return ret; | |
b439b103 | 642 | } |
24b84912 JK |
643 | if (!f2fs_has_inline_data(inode)) |
644 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
b439b103 | 645 | return ret; |
59b802e5 JK |
646 | } |
647 | ||
0a8165d7 | 648 | /* |
003a3e1d JK |
649 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
650 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
651 | * If original data blocks are allocated, then give them to blockdev. |
652 | * Otherwise, | |
653 | * a. preallocate requested block addresses | |
654 | * b. do not use extent cache for better performance | |
655 | * c. give the block addresses to blockdev | |
eb47b800 | 656 | */ |
d323d005 | 657 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 658 | int create, int flag) |
eb47b800 | 659 | { |
003a3e1d | 660 | unsigned int maxblocks = map->m_len; |
eb47b800 | 661 | struct dnode_of_data dn; |
f9811703 | 662 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
bfad7c2d | 663 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
46008c6d | 664 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 665 | int err = 0, ofs = 1; |
46008c6d CY |
666 | unsigned int ofs_in_node, last_ofs_in_node; |
667 | blkcnt_t prealloc; | |
a2e7d1bf | 668 | struct extent_info ei; |
bfad7c2d | 669 | bool allocated = false; |
7df3a431 | 670 | block_t blkaddr; |
eb47b800 | 671 | |
003a3e1d JK |
672 | map->m_len = 0; |
673 | map->m_flags = 0; | |
674 | ||
675 | /* it only supports block size == page size */ | |
676 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 677 | end = pgofs + maxblocks; |
eb47b800 | 678 | |
24b84912 | 679 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
680 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
681 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
682 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 683 | goto out; |
a2e7d1bf | 684 | } |
bfad7c2d | 685 | |
4fe71e88 | 686 | next_dnode: |
59b802e5 | 687 | if (create) |
3104af35 | 688 | f2fs_lock_op(sbi); |
eb47b800 JK |
689 | |
690 | /* When reading holes, we need its node page */ | |
691 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 692 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 693 | if (err) { |
43473f96 CY |
694 | if (flag == F2FS_GET_BLOCK_BMAP) |
695 | map->m_pblk = 0; | |
da85985c | 696 | if (err == -ENOENT) { |
bfad7c2d | 697 | err = 0; |
da85985c CY |
698 | if (map->m_next_pgofs) |
699 | *map->m_next_pgofs = | |
700 | get_next_page_offset(&dn, pgofs); | |
701 | } | |
bfad7c2d | 702 | goto unlock_out; |
848753aa | 703 | } |
973163fc | 704 | |
46008c6d CY |
705 | prealloc = 0; |
706 | ofs_in_node = dn.ofs_in_node; | |
81ca7350 | 707 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
708 | |
709 | next_block: | |
710 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
711 | ||
712 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 713 | if (create) { |
f9811703 CY |
714 | if (unlikely(f2fs_cp_error(sbi))) { |
715 | err = -EIO; | |
4fe71e88 | 716 | goto sync_out; |
f9811703 | 717 | } |
24b84912 | 718 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
719 | if (blkaddr == NULL_ADDR) { |
720 | prealloc++; | |
721 | last_ofs_in_node = dn.ofs_in_node; | |
722 | } | |
24b84912 JK |
723 | } else { |
724 | err = __allocate_data_block(&dn); | |
46008c6d | 725 | if (!err) { |
6bfc4919 JK |
726 | set_inode_flag(F2FS_I(inode), |
727 | FI_APPEND_WRITE); | |
46008c6d CY |
728 | allocated = true; |
729 | } | |
24b84912 | 730 | } |
973163fc | 731 | if (err) |
4fe71e88 | 732 | goto sync_out; |
973163fc | 733 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 734 | blkaddr = dn.data_blkaddr; |
973163fc | 735 | } else { |
43473f96 CY |
736 | if (flag == F2FS_GET_BLOCK_BMAP) { |
737 | map->m_pblk = 0; | |
738 | goto sync_out; | |
739 | } | |
da85985c CY |
740 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
741 | blkaddr == NULL_ADDR) { | |
742 | if (map->m_next_pgofs) | |
743 | *map->m_next_pgofs = pgofs + 1; | |
744 | } | |
973163fc | 745 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 746 | blkaddr != NEW_ADDR) |
4fe71e88 | 747 | goto sync_out; |
e2b4e2bc | 748 | } |
e2b4e2bc | 749 | } |
eb47b800 | 750 | |
46008c6d CY |
751 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
752 | goto skip; | |
753 | ||
4fe71e88 CY |
754 | if (map->m_len == 0) { |
755 | /* preallocated unwritten block should be mapped for fiemap. */ | |
756 | if (blkaddr == NEW_ADDR) | |
757 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
758 | map->m_flags |= F2FS_MAP_MAPPED; | |
759 | ||
760 | map->m_pblk = blkaddr; | |
761 | map->m_len = 1; | |
762 | } else if ((map->m_pblk != NEW_ADDR && | |
763 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 764 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 765 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
766 | ofs++; |
767 | map->m_len++; | |
768 | } else { | |
769 | goto sync_out; | |
770 | } | |
bfad7c2d | 771 | |
46008c6d | 772 | skip: |
bfad7c2d JK |
773 | dn.ofs_in_node++; |
774 | pgofs++; | |
775 | ||
46008c6d CY |
776 | /* preallocate blocks in batch for one dnode page */ |
777 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
778 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 779 | |
46008c6d CY |
780 | dn.ofs_in_node = ofs_in_node; |
781 | err = reserve_new_blocks(&dn, prealloc); | |
782 | if (err) | |
783 | goto sync_out; | |
bfad7c2d | 784 | |
46008c6d CY |
785 | map->m_len += dn.ofs_in_node - ofs_in_node; |
786 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
787 | err = -ENOSPC; | |
788 | goto sync_out; | |
3104af35 | 789 | } |
46008c6d CY |
790 | dn.ofs_in_node = end_offset; |
791 | } | |
792 | ||
793 | if (pgofs >= end) | |
794 | goto sync_out; | |
795 | else if (dn.ofs_in_node < end_offset) | |
796 | goto next_block; | |
797 | ||
798 | if (allocated) | |
799 | sync_inode_page(&dn); | |
800 | f2fs_put_dnode(&dn); | |
801 | ||
802 | if (create) { | |
803 | f2fs_unlock_op(sbi); | |
804 | f2fs_balance_fs(sbi, allocated); | |
eb47b800 | 805 | } |
46008c6d CY |
806 | allocated = false; |
807 | goto next_dnode; | |
7df3a431 | 808 | |
bfad7c2d JK |
809 | sync_out: |
810 | if (allocated) | |
811 | sync_inode_page(&dn); | |
eb47b800 | 812 | f2fs_put_dnode(&dn); |
bfad7c2d | 813 | unlock_out: |
2a340760 | 814 | if (create) { |
3104af35 | 815 | f2fs_unlock_op(sbi); |
3c082b7b | 816 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 817 | } |
bfad7c2d | 818 | out: |
003a3e1d | 819 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 820 | return err; |
eb47b800 JK |
821 | } |
822 | ||
003a3e1d | 823 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
824 | struct buffer_head *bh, int create, int flag, |
825 | pgoff_t *next_pgofs) | |
003a3e1d JK |
826 | { |
827 | struct f2fs_map_blocks map; | |
828 | int ret; | |
829 | ||
830 | map.m_lblk = iblock; | |
831 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 832 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 833 | |
e2b4e2bc | 834 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
835 | if (!ret) { |
836 | map_bh(bh, inode->i_sb, map.m_pblk); | |
837 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
838 | bh->b_size = map.m_len << inode->i_blkbits; | |
839 | } | |
840 | return ret; | |
841 | } | |
842 | ||
ccfb3000 | 843 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
844 | struct buffer_head *bh_result, int create, int flag, |
845 | pgoff_t *next_pgofs) | |
e2b4e2bc | 846 | { |
da85985c CY |
847 | return __get_data_block(inode, iblock, bh_result, create, |
848 | flag, next_pgofs); | |
e2b4e2bc CY |
849 | } |
850 | ||
851 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
852 | struct buffer_head *bh_result, int create) |
853 | { | |
e2b4e2bc | 854 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 855 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
856 | } |
857 | ||
e2b4e2bc | 858 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
859 | struct buffer_head *bh_result, int create) |
860 | { | |
179448bf | 861 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 862 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
863 | return -EFBIG; |
864 | ||
e2b4e2bc | 865 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 866 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
867 | } |
868 | ||
7f63eb77 JK |
869 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
870 | { | |
871 | return (offset >> inode->i_blkbits); | |
872 | } | |
873 | ||
874 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
875 | { | |
876 | return (blk << inode->i_blkbits); | |
877 | } | |
878 | ||
9ab70134 JK |
879 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
880 | u64 start, u64 len) | |
881 | { | |
7f63eb77 JK |
882 | struct buffer_head map_bh; |
883 | sector_t start_blk, last_blk; | |
da85985c | 884 | pgoff_t next_pgofs; |
de1475cc | 885 | loff_t isize; |
7f63eb77 JK |
886 | u64 logical = 0, phys = 0, size = 0; |
887 | u32 flags = 0; | |
7f63eb77 JK |
888 | int ret = 0; |
889 | ||
890 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
891 | if (ret) | |
892 | return ret; | |
893 | ||
67f8cf3c JK |
894 | if (f2fs_has_inline_data(inode)) { |
895 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
896 | if (ret != -EAGAIN) | |
897 | return ret; | |
898 | } | |
899 | ||
5955102c | 900 | inode_lock(inode); |
de1475cc FL |
901 | |
902 | isize = i_size_read(inode); | |
9a950d52 FL |
903 | if (start >= isize) |
904 | goto out; | |
7f63eb77 | 905 | |
9a950d52 FL |
906 | if (start + len > isize) |
907 | len = isize - start; | |
7f63eb77 JK |
908 | |
909 | if (logical_to_blk(inode, len) == 0) | |
910 | len = blk_to_logical(inode, 1); | |
911 | ||
912 | start_blk = logical_to_blk(inode, start); | |
913 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 914 | |
7f63eb77 JK |
915 | next: |
916 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
917 | map_bh.b_size = len; | |
918 | ||
e2b4e2bc | 919 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 920 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
921 | if (ret) |
922 | goto out; | |
923 | ||
924 | /* HOLE */ | |
925 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 926 | start_blk = next_pgofs; |
9a950d52 | 927 | /* Go through holes util pass the EOF */ |
da85985c | 928 | if (blk_to_logical(inode, start_blk) < isize) |
9a950d52 FL |
929 | goto prep_next; |
930 | /* Found a hole beyond isize means no more extents. | |
931 | * Note that the premise is that filesystems don't | |
932 | * punch holes beyond isize and keep size unchanged. | |
933 | */ | |
934 | flags |= FIEMAP_EXTENT_LAST; | |
935 | } | |
7f63eb77 | 936 | |
da5af127 CY |
937 | if (size) { |
938 | if (f2fs_encrypted_inode(inode)) | |
939 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
940 | ||
9a950d52 FL |
941 | ret = fiemap_fill_next_extent(fieinfo, logical, |
942 | phys, size, flags); | |
da5af127 | 943 | } |
7f63eb77 | 944 | |
9a950d52 FL |
945 | if (start_blk > last_blk || ret) |
946 | goto out; | |
7f63eb77 | 947 | |
9a950d52 FL |
948 | logical = blk_to_logical(inode, start_blk); |
949 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
950 | size = map_bh.b_size; | |
951 | flags = 0; | |
952 | if (buffer_unwritten(&map_bh)) | |
953 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 954 | |
9a950d52 | 955 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 956 | |
9a950d52 | 957 | prep_next: |
7f63eb77 JK |
958 | cond_resched(); |
959 | if (fatal_signal_pending(current)) | |
960 | ret = -EINTR; | |
961 | else | |
962 | goto next; | |
963 | out: | |
964 | if (ret == 1) | |
965 | ret = 0; | |
966 | ||
5955102c | 967 | inode_unlock(inode); |
7f63eb77 | 968 | return ret; |
9ab70134 JK |
969 | } |
970 | ||
f1e88660 JK |
971 | /* |
972 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
973 | * Major change was from block_size == page_size in f2fs by default. | |
974 | */ | |
975 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
976 | struct list_head *pages, struct page *page, | |
977 | unsigned nr_pages) | |
978 | { | |
979 | struct bio *bio = NULL; | |
980 | unsigned page_idx; | |
981 | sector_t last_block_in_bio = 0; | |
982 | struct inode *inode = mapping->host; | |
983 | const unsigned blkbits = inode->i_blkbits; | |
984 | const unsigned blocksize = 1 << blkbits; | |
985 | sector_t block_in_file; | |
986 | sector_t last_block; | |
987 | sector_t last_block_in_file; | |
988 | sector_t block_nr; | |
989 | struct block_device *bdev = inode->i_sb->s_bdev; | |
990 | struct f2fs_map_blocks map; | |
991 | ||
992 | map.m_pblk = 0; | |
993 | map.m_lblk = 0; | |
994 | map.m_len = 0; | |
995 | map.m_flags = 0; | |
da85985c | 996 | map.m_next_pgofs = NULL; |
f1e88660 JK |
997 | |
998 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
999 | ||
1000 | prefetchw(&page->flags); | |
1001 | if (pages) { | |
1002 | page = list_entry(pages->prev, struct page, lru); | |
1003 | list_del(&page->lru); | |
1004 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1005 | page->index, |
1006 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1007 | goto next_page; |
1008 | } | |
1009 | ||
1010 | block_in_file = (sector_t)page->index; | |
1011 | last_block = block_in_file + nr_pages; | |
1012 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1013 | blkbits; | |
1014 | if (last_block > last_block_in_file) | |
1015 | last_block = last_block_in_file; | |
1016 | ||
1017 | /* | |
1018 | * Map blocks using the previous result first. | |
1019 | */ | |
1020 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1021 | block_in_file > map.m_lblk && | |
1022 | block_in_file < (map.m_lblk + map.m_len)) | |
1023 | goto got_it; | |
1024 | ||
1025 | /* | |
1026 | * Then do more f2fs_map_blocks() calls until we are | |
1027 | * done with this page. | |
1028 | */ | |
1029 | map.m_flags = 0; | |
1030 | ||
1031 | if (block_in_file < last_block) { | |
1032 | map.m_lblk = block_in_file; | |
1033 | map.m_len = last_block - block_in_file; | |
1034 | ||
46c9e141 | 1035 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1036 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1037 | goto set_error_page; |
1038 | } | |
1039 | got_it: | |
1040 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1041 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1042 | SetPageMappedToDisk(page); | |
1043 | ||
1044 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1045 | SetPageUptodate(page); | |
1046 | goto confused; | |
1047 | } | |
1048 | } else { | |
09cbfeaf | 1049 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1050 | SetPageUptodate(page); |
1051 | unlock_page(page); | |
1052 | goto next_page; | |
1053 | } | |
1054 | ||
1055 | /* | |
1056 | * This page will go to BIO. Do we need to send this | |
1057 | * BIO off first? | |
1058 | */ | |
1059 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
1060 | submit_and_realloc: | |
04d328de | 1061 | __submit_bio(F2FS_I_SB(inode), bio); |
f1e88660 JK |
1062 | bio = NULL; |
1063 | } | |
1064 | if (bio == NULL) { | |
0b81d077 | 1065 | struct fscrypt_ctx *ctx = NULL; |
4375a336 JK |
1066 | |
1067 | if (f2fs_encrypted_inode(inode) && | |
1068 | S_ISREG(inode->i_mode)) { | |
4375a336 | 1069 | |
b32e4482 | 1070 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); |
4375a336 JK |
1071 | if (IS_ERR(ctx)) |
1072 | goto set_error_page; | |
1073 | ||
1074 | /* wait the page to be moved by cleaning */ | |
08b39fbd CY |
1075 | f2fs_wait_on_encrypted_page_writeback( |
1076 | F2FS_I_SB(inode), block_nr); | |
4375a336 JK |
1077 | } |
1078 | ||
f1e88660 | 1079 | bio = bio_alloc(GFP_KERNEL, |
b54ffb73 | 1080 | min_t(int, nr_pages, BIO_MAX_PAGES)); |
4375a336 JK |
1081 | if (!bio) { |
1082 | if (ctx) | |
0b81d077 | 1083 | fscrypt_release_ctx(ctx); |
f1e88660 | 1084 | goto set_error_page; |
4375a336 | 1085 | } |
f1e88660 JK |
1086 | bio->bi_bdev = bdev; |
1087 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(block_nr); | |
12377024 | 1088 | bio->bi_end_io = f2fs_read_end_io; |
4375a336 | 1089 | bio->bi_private = ctx; |
04d328de | 1090 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1091 | } |
1092 | ||
1093 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1094 | goto submit_and_realloc; | |
1095 | ||
1096 | last_block_in_bio = block_nr; | |
1097 | goto next_page; | |
1098 | set_error_page: | |
1099 | SetPageError(page); | |
09cbfeaf | 1100 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1101 | unlock_page(page); |
1102 | goto next_page; | |
1103 | confused: | |
1104 | if (bio) { | |
04d328de | 1105 | __submit_bio(F2FS_I_SB(inode), bio); |
f1e88660 JK |
1106 | bio = NULL; |
1107 | } | |
1108 | unlock_page(page); | |
1109 | next_page: | |
1110 | if (pages) | |
09cbfeaf | 1111 | put_page(page); |
f1e88660 JK |
1112 | } |
1113 | BUG_ON(pages && !list_empty(pages)); | |
1114 | if (bio) | |
04d328de | 1115 | __submit_bio(F2FS_I_SB(inode), bio); |
f1e88660 JK |
1116 | return 0; |
1117 | } | |
1118 | ||
eb47b800 JK |
1119 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1120 | { | |
9ffe0fb5 | 1121 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1122 | int ret = -EAGAIN; |
9ffe0fb5 | 1123 | |
c20e89cd CY |
1124 | trace_f2fs_readpage(page, DATA); |
1125 | ||
e1c42045 | 1126 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1127 | if (f2fs_has_inline_data(inode)) |
1128 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1129 | if (ret == -EAGAIN) |
f1e88660 | 1130 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1131 | return ret; |
eb47b800 JK |
1132 | } |
1133 | ||
1134 | static int f2fs_read_data_pages(struct file *file, | |
1135 | struct address_space *mapping, | |
1136 | struct list_head *pages, unsigned nr_pages) | |
1137 | { | |
9ffe0fb5 | 1138 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1139 | struct page *page = list_entry(pages->prev, struct page, lru); |
1140 | ||
1141 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1142 | |
1143 | /* If the file has inline data, skip readpages */ | |
1144 | if (f2fs_has_inline_data(inode)) | |
1145 | return 0; | |
1146 | ||
f1e88660 | 1147 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1148 | } |
1149 | ||
05ca3632 | 1150 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1151 | { |
05ca3632 | 1152 | struct page *page = fio->page; |
eb47b800 | 1153 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1154 | struct dnode_of_data dn; |
1155 | int err = 0; | |
1156 | ||
1157 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1158 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1159 | if (err) |
1160 | return err; | |
1161 | ||
28bc106b | 1162 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1163 | |
1164 | /* This page is already truncated */ | |
7a9d7548 | 1165 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1166 | ClearPageUptodate(page); |
eb47b800 | 1167 | goto out_writepage; |
2bca1e23 | 1168 | } |
eb47b800 | 1169 | |
4375a336 | 1170 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1171 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1172 | |
1173 | /* wait for GCed encrypted page writeback */ | |
1174 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1175 | fio->old_blkaddr); |
b32e4482 JK |
1176 | retry_encrypt: |
1177 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1178 | gfp_flags); | |
4375a336 JK |
1179 | if (IS_ERR(fio->encrypted_page)) { |
1180 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1181 | if (err == -ENOMEM) { |
1182 | /* flush pending ios and wait for a while */ | |
1183 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1184 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1185 | gfp_flags |= __GFP_NOFAIL; | |
1186 | err = 0; | |
1187 | goto retry_encrypt; | |
1188 | } | |
4375a336 JK |
1189 | goto out_writepage; |
1190 | } | |
1191 | } | |
1192 | ||
eb47b800 JK |
1193 | set_page_writeback(page); |
1194 | ||
1195 | /* | |
1196 | * If current allocation needs SSR, | |
1197 | * it had better in-place writes for updated data. | |
1198 | */ | |
7a9d7548 | 1199 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1200 | !is_cold_data(page) && |
2da3e027 | 1201 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1202 | need_inplace_update(inode))) { |
05ca3632 | 1203 | rewrite_data_page(fio); |
fff04f90 | 1204 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
8ce67cb0 | 1205 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1206 | } else { |
05ca3632 | 1207 | write_data_page(&dn, fio); |
8ce67cb0 | 1208 | trace_f2fs_do_write_data_page(page, OPU); |
fff04f90 | 1209 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
3c6c2beb JK |
1210 | if (page->index == 0) |
1211 | set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1212 | } |
1213 | out_writepage: | |
1214 | f2fs_put_dnode(&dn); | |
1215 | return err; | |
1216 | } | |
1217 | ||
1218 | static int f2fs_write_data_page(struct page *page, | |
1219 | struct writeback_control *wbc) | |
1220 | { | |
1221 | struct inode *inode = page->mapping->host; | |
4081363f | 1222 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1223 | loff_t i_size = i_size_read(inode); |
1224 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1225 | >> PAGE_SHIFT; |
9ffe0fb5 | 1226 | unsigned offset = 0; |
39936837 | 1227 | bool need_balance_fs = false; |
eb47b800 | 1228 | int err = 0; |
458e6197 | 1229 | struct f2fs_io_info fio = { |
05ca3632 | 1230 | .sbi = sbi, |
458e6197 | 1231 | .type = DATA, |
04d328de MC |
1232 | .op = REQ_OP_WRITE, |
1233 | .op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0, | |
05ca3632 | 1234 | .page = page, |
4375a336 | 1235 | .encrypted_page = NULL, |
458e6197 | 1236 | }; |
eb47b800 | 1237 | |
ecda0de3 CY |
1238 | trace_f2fs_writepage(page, DATA); |
1239 | ||
eb47b800 | 1240 | if (page->index < end_index) |
39936837 | 1241 | goto write; |
eb47b800 JK |
1242 | |
1243 | /* | |
1244 | * If the offset is out-of-range of file size, | |
1245 | * this page does not have to be written to disk. | |
1246 | */ | |
09cbfeaf | 1247 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1248 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1249 | goto out; |
eb47b800 | 1250 | |
09cbfeaf | 1251 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1252 | write: |
caf0047e | 1253 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1254 | goto redirty_out; |
1e84371f JK |
1255 | if (f2fs_is_drop_cache(inode)) |
1256 | goto out; | |
e6e5f561 JK |
1257 | /* we should not write 0'th page having journal header */ |
1258 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1259 | (!wbc->for_reclaim && | |
1260 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1261 | goto redirty_out; |
eb47b800 | 1262 | |
39936837 | 1263 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1264 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
1265 | if (unlikely(f2fs_cp_error(sbi))) |
1266 | goto redirty_out; | |
05ca3632 | 1267 | err = do_write_data_page(&fio); |
8618b881 JK |
1268 | goto done; |
1269 | } | |
9ffe0fb5 | 1270 | |
cf779cab JK |
1271 | /* we should bypass data pages to proceed the kworkder jobs */ |
1272 | if (unlikely(f2fs_cp_error(sbi))) { | |
1273 | SetPageError(page); | |
a7ffdbe2 | 1274 | goto out; |
cf779cab JK |
1275 | } |
1276 | ||
8618b881 | 1277 | if (!wbc->for_reclaim) |
39936837 | 1278 | need_balance_fs = true; |
8618b881 | 1279 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 1280 | goto redirty_out; |
eb47b800 | 1281 | |
b3d208f9 | 1282 | err = -EAGAIN; |
8618b881 | 1283 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1284 | if (f2fs_has_inline_data(inode)) |
1285 | err = f2fs_write_inline_data(inode, page); | |
1286 | if (err == -EAGAIN) | |
05ca3632 | 1287 | err = do_write_data_page(&fio); |
8618b881 JK |
1288 | f2fs_unlock_op(sbi); |
1289 | done: | |
1290 | if (err && err != -ENOENT) | |
1291 | goto redirty_out; | |
eb47b800 | 1292 | |
eb47b800 | 1293 | clear_cold_data(page); |
39936837 | 1294 | out: |
a7ffdbe2 | 1295 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1296 | if (err) |
1297 | ClearPageUptodate(page); | |
0c3a5797 CY |
1298 | |
1299 | if (wbc->for_reclaim) { | |
1300 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1301 | remove_dirty_inode(inode); | |
1302 | } | |
1303 | ||
eb47b800 | 1304 | unlock_page(page); |
2c4db1a6 | 1305 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1306 | |
1307 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1308 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1309 | |
eb47b800 JK |
1310 | return 0; |
1311 | ||
eb47b800 | 1312 | redirty_out: |
76f60268 | 1313 | redirty_page_for_writepage(wbc, page); |
8618b881 | 1314 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
1315 | } |
1316 | ||
fa9150a8 NJ |
1317 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
1318 | void *data) | |
1319 | { | |
1320 | struct address_space *mapping = data; | |
1321 | int ret = mapping->a_ops->writepage(page, wbc); | |
1322 | mapping_set_error(mapping, ret); | |
1323 | return ret; | |
1324 | } | |
1325 | ||
8f46dcae CY |
1326 | /* |
1327 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1328 | * The major change is making write step of cold data page separately from | |
1329 | * warm/hot data page. | |
1330 | */ | |
1331 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
1332 | struct writeback_control *wbc, writepage_t writepage, | |
1333 | void *data) | |
1334 | { | |
1335 | int ret = 0; | |
1336 | int done = 0; | |
1337 | struct pagevec pvec; | |
1338 | int nr_pages; | |
1339 | pgoff_t uninitialized_var(writeback_index); | |
1340 | pgoff_t index; | |
1341 | pgoff_t end; /* Inclusive */ | |
1342 | pgoff_t done_index; | |
1343 | int cycled; | |
1344 | int range_whole = 0; | |
1345 | int tag; | |
1346 | int step = 0; | |
1347 | ||
1348 | pagevec_init(&pvec, 0); | |
1349 | next: | |
1350 | if (wbc->range_cyclic) { | |
1351 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1352 | index = writeback_index; | |
1353 | if (index == 0) | |
1354 | cycled = 1; | |
1355 | else | |
1356 | cycled = 0; | |
1357 | end = -1; | |
1358 | } else { | |
09cbfeaf KS |
1359 | index = wbc->range_start >> PAGE_SHIFT; |
1360 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1361 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1362 | range_whole = 1; | |
1363 | cycled = 1; /* ignore range_cyclic tests */ | |
1364 | } | |
1365 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1366 | tag = PAGECACHE_TAG_TOWRITE; | |
1367 | else | |
1368 | tag = PAGECACHE_TAG_DIRTY; | |
1369 | retry: | |
1370 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1371 | tag_pages_for_writeback(mapping, index, end); | |
1372 | done_index = index; | |
1373 | while (!done && (index <= end)) { | |
1374 | int i; | |
1375 | ||
1376 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1377 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1378 | if (nr_pages == 0) | |
1379 | break; | |
1380 | ||
1381 | for (i = 0; i < nr_pages; i++) { | |
1382 | struct page *page = pvec.pages[i]; | |
1383 | ||
1384 | if (page->index > end) { | |
1385 | done = 1; | |
1386 | break; | |
1387 | } | |
1388 | ||
1389 | done_index = page->index; | |
1390 | ||
1391 | lock_page(page); | |
1392 | ||
1393 | if (unlikely(page->mapping != mapping)) { | |
1394 | continue_unlock: | |
1395 | unlock_page(page); | |
1396 | continue; | |
1397 | } | |
1398 | ||
1399 | if (!PageDirty(page)) { | |
1400 | /* someone wrote it for us */ | |
1401 | goto continue_unlock; | |
1402 | } | |
1403 | ||
737f1899 | 1404 | if (step == is_cold_data(page)) |
8f46dcae CY |
1405 | goto continue_unlock; |
1406 | ||
1407 | if (PageWriteback(page)) { | |
1408 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1409 | f2fs_wait_on_page_writeback(page, |
1410 | DATA, true); | |
8f46dcae CY |
1411 | else |
1412 | goto continue_unlock; | |
1413 | } | |
1414 | ||
1415 | BUG_ON(PageWriteback(page)); | |
1416 | if (!clear_page_dirty_for_io(page)) | |
1417 | goto continue_unlock; | |
1418 | ||
1419 | ret = (*writepage)(page, wbc, data); | |
1420 | if (unlikely(ret)) { | |
1421 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1422 | unlock_page(page); | |
1423 | ret = 0; | |
1424 | } else { | |
1425 | done_index = page->index + 1; | |
1426 | done = 1; | |
1427 | break; | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | if (--wbc->nr_to_write <= 0 && | |
1432 | wbc->sync_mode == WB_SYNC_NONE) { | |
1433 | done = 1; | |
1434 | break; | |
1435 | } | |
1436 | } | |
1437 | pagevec_release(&pvec); | |
1438 | cond_resched(); | |
1439 | } | |
1440 | ||
1441 | if (step < 1) { | |
1442 | step++; | |
1443 | goto next; | |
1444 | } | |
1445 | ||
1446 | if (!cycled && !done) { | |
1447 | cycled = 1; | |
1448 | index = 0; | |
1449 | end = writeback_index - 1; | |
1450 | goto retry; | |
1451 | } | |
1452 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1453 | mapping->writeback_index = done_index; | |
1454 | ||
1455 | return ret; | |
1456 | } | |
1457 | ||
25ca923b | 1458 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1459 | struct writeback_control *wbc) |
1460 | { | |
1461 | struct inode *inode = mapping->host; | |
4081363f | 1462 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
5463e7c1 | 1463 | bool locked = false; |
eb47b800 | 1464 | int ret; |
50c8cdb3 | 1465 | long diff; |
eb47b800 | 1466 | |
cfb185a1 | 1467 | /* deal with chardevs and other special file */ |
1468 | if (!mapping->a_ops->writepage) | |
1469 | return 0; | |
1470 | ||
6a290544 CY |
1471 | /* skip writing if there is no dirty page in this inode */ |
1472 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1473 | return 0; | |
1474 | ||
a1257023 JK |
1475 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1476 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1477 | available_free_memory(sbi, DIRTY_DENTS)) | |
1478 | goto skip_write; | |
1479 | ||
d323d005 CY |
1480 | /* skip writing during file defragment */ |
1481 | if (is_inode_flag_set(F2FS_I(inode), FI_DO_DEFRAG)) | |
1482 | goto skip_write; | |
1483 | ||
d5669f7b JK |
1484 | /* during POR, we don't need to trigger writepage at all. */ |
1485 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1486 | goto skip_write; | |
1487 | ||
d31c7c3f YH |
1488 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1489 | ||
50c8cdb3 | 1490 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 1491 | |
25c13551 | 1492 | if (!S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_ALL) { |
5463e7c1 JK |
1493 | mutex_lock(&sbi->writepages); |
1494 | locked = true; | |
1495 | } | |
8f46dcae | 1496 | ret = f2fs_write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
0c3a5797 | 1497 | f2fs_submit_merged_bio_cond(sbi, inode, NULL, 0, DATA, WRITE); |
5463e7c1 JK |
1498 | if (locked) |
1499 | mutex_unlock(&sbi->writepages); | |
458e6197 | 1500 | |
c227f912 | 1501 | remove_dirty_inode(inode); |
eb47b800 | 1502 | |
50c8cdb3 | 1503 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 1504 | return ret; |
d3baf95d JK |
1505 | |
1506 | skip_write: | |
a7ffdbe2 | 1507 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1508 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1509 | return 0; |
eb47b800 JK |
1510 | } |
1511 | ||
3aab8f82 CY |
1512 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1513 | { | |
1514 | struct inode *inode = mapping->host; | |
819d9153 | 1515 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1516 | |
819d9153 JK |
1517 | if (to > i_size) { |
1518 | truncate_pagecache(inode, i_size); | |
1519 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1520 | } |
1521 | } | |
1522 | ||
2aadac08 JK |
1523 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1524 | struct page *page, loff_t pos, unsigned len, | |
1525 | block_t *blk_addr, bool *node_changed) | |
1526 | { | |
1527 | struct inode *inode = page->mapping->host; | |
1528 | pgoff_t index = page->index; | |
1529 | struct dnode_of_data dn; | |
1530 | struct page *ipage; | |
b4d07a3e JK |
1531 | bool locked = false; |
1532 | struct extent_info ei; | |
2aadac08 JK |
1533 | int err = 0; |
1534 | ||
24b84912 JK |
1535 | /* |
1536 | * we already allocated all the blocks, so we don't need to get | |
1537 | * the block addresses when there is no need to fill the page. | |
1538 | */ | |
1539 | if (!f2fs_has_inline_data(inode) && !f2fs_encrypted_inode(inode) && | |
09cbfeaf | 1540 | len == PAGE_SIZE) |
24b84912 JK |
1541 | return 0; |
1542 | ||
b4d07a3e | 1543 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1544 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1545 | f2fs_lock_op(sbi); |
1546 | locked = true; | |
1547 | } | |
1548 | restart: | |
2aadac08 JK |
1549 | /* check inline_data */ |
1550 | ipage = get_node_page(sbi, inode->i_ino); | |
1551 | if (IS_ERR(ipage)) { | |
1552 | err = PTR_ERR(ipage); | |
1553 | goto unlock_out; | |
1554 | } | |
1555 | ||
1556 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1557 | ||
1558 | if (f2fs_has_inline_data(inode)) { | |
1559 | if (pos + len <= MAX_INLINE_DATA) { | |
1560 | read_inline_data(page, ipage); | |
1561 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
ab47036d CY |
1562 | if (inode->i_nlink) |
1563 | set_inline_node(ipage); | |
2aadac08 JK |
1564 | } else { |
1565 | err = f2fs_convert_inline_page(&dn, page); | |
1566 | if (err) | |
b4d07a3e JK |
1567 | goto out; |
1568 | if (dn.data_blkaddr == NULL_ADDR) | |
1569 | err = f2fs_get_block(&dn, index); | |
1570 | } | |
1571 | } else if (locked) { | |
1572 | err = f2fs_get_block(&dn, index); | |
1573 | } else { | |
1574 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1575 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1576 | } else { | |
b4d07a3e JK |
1577 | /* hole case */ |
1578 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1579 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1580 | f2fs_put_dnode(&dn); |
1581 | f2fs_lock_op(sbi); | |
1582 | locked = true; | |
1583 | goto restart; | |
1584 | } | |
2aadac08 JK |
1585 | } |
1586 | } | |
b4d07a3e | 1587 | |
2aadac08 JK |
1588 | /* convert_inline_page can make node_changed */ |
1589 | *blk_addr = dn.data_blkaddr; | |
1590 | *node_changed = dn.node_changed; | |
b4d07a3e | 1591 | out: |
2aadac08 JK |
1592 | f2fs_put_dnode(&dn); |
1593 | unlock_out: | |
b4d07a3e JK |
1594 | if (locked) |
1595 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1596 | return err; |
1597 | } | |
1598 | ||
eb47b800 JK |
1599 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1600 | loff_t pos, unsigned len, unsigned flags, | |
1601 | struct page **pagep, void **fsdata) | |
1602 | { | |
1603 | struct inode *inode = mapping->host; | |
4081363f | 1604 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1605 | struct page *page = NULL; |
09cbfeaf | 1606 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1607 | bool need_balance = false; |
1608 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1609 | int err = 0; |
1610 | ||
62aed044 CY |
1611 | trace_f2fs_write_begin(inode, pos, len, flags); |
1612 | ||
5f727395 JK |
1613 | /* |
1614 | * We should check this at this moment to avoid deadlock on inode page | |
1615 | * and #0 page. The locking rule for inline_data conversion should be: | |
1616 | * lock_page(page #0) -> lock_page(inode_page) | |
1617 | */ | |
1618 | if (index != 0) { | |
1619 | err = f2fs_convert_inline_inode(inode); | |
1620 | if (err) | |
1621 | goto fail; | |
1622 | } | |
afcb7ca0 | 1623 | repeat: |
eb47b800 | 1624 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1625 | if (!page) { |
1626 | err = -ENOMEM; | |
1627 | goto fail; | |
1628 | } | |
d5f66990 | 1629 | |
eb47b800 JK |
1630 | *pagep = page; |
1631 | ||
2aadac08 JK |
1632 | err = prepare_write_begin(sbi, page, pos, len, |
1633 | &blkaddr, &need_balance); | |
9ba69cf9 | 1634 | if (err) |
2aadac08 | 1635 | goto fail; |
9ba69cf9 | 1636 | |
2aadac08 | 1637 | if (need_balance && has_not_enough_free_secs(sbi, 0)) { |
2a340760 | 1638 | unlock_page(page); |
2c4db1a6 | 1639 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1640 | lock_page(page); |
1641 | if (page->mapping != mapping) { | |
1642 | /* The page got truncated from under us */ | |
1643 | f2fs_put_page(page, 1); | |
1644 | goto repeat; | |
1645 | } | |
1646 | } | |
1647 | ||
fec1d657 | 1648 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1649 | |
08b39fbd CY |
1650 | /* wait for GCed encrypted page writeback */ |
1651 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1652 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1653 | |
09cbfeaf | 1654 | if (len == PAGE_SIZE) |
90d4388a CY |
1655 | goto out_update; |
1656 | if (PageUptodate(page)) | |
1657 | goto out_clear; | |
eb47b800 | 1658 | |
09cbfeaf KS |
1659 | if ((pos & PAGE_MASK) >= i_size_read(inode)) { |
1660 | unsigned start = pos & (PAGE_SIZE - 1); | |
eb47b800 JK |
1661 | unsigned end = start + len; |
1662 | ||
1663 | /* Reading beyond i_size is simple: memset to zero */ | |
09cbfeaf | 1664 | zero_user_segments(page, 0, start, end, PAGE_SIZE); |
90d4388a | 1665 | goto out_update; |
eb47b800 JK |
1666 | } |
1667 | ||
2aadac08 | 1668 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1669 | zero_user_segment(page, 0, PAGE_SIZE); |
eb47b800 | 1670 | } else { |
cf04e8eb | 1671 | struct f2fs_io_info fio = { |
05ca3632 | 1672 | .sbi = sbi, |
cf04e8eb | 1673 | .type = DATA, |
04d328de MC |
1674 | .op = REQ_OP_READ, |
1675 | .op_flags = READ_SYNC, | |
7a9d7548 CY |
1676 | .old_blkaddr = blkaddr, |
1677 | .new_blkaddr = blkaddr, | |
05ca3632 | 1678 | .page = page, |
4375a336 | 1679 | .encrypted_page = NULL, |
cf04e8eb | 1680 | }; |
05ca3632 | 1681 | err = f2fs_submit_page_bio(&fio); |
9234f319 JK |
1682 | if (err) |
1683 | goto fail; | |
d54c795b | 1684 | |
393ff91f | 1685 | lock_page(page); |
6bacf52f | 1686 | if (unlikely(!PageUptodate(page))) { |
3aab8f82 CY |
1687 | err = -EIO; |
1688 | goto fail; | |
eb47b800 | 1689 | } |
6bacf52f | 1690 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1691 | f2fs_put_page(page, 1); |
1692 | goto repeat; | |
eb47b800 | 1693 | } |
4375a336 JK |
1694 | |
1695 | /* avoid symlink page */ | |
1696 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
0b81d077 | 1697 | err = fscrypt_decrypt_page(page); |
86531d6b | 1698 | if (err) |
4375a336 | 1699 | goto fail; |
4375a336 | 1700 | } |
eb47b800 | 1701 | } |
90d4388a | 1702 | out_update: |
eb47b800 | 1703 | SetPageUptodate(page); |
90d4388a | 1704 | out_clear: |
eb47b800 JK |
1705 | clear_cold_data(page); |
1706 | return 0; | |
9ba69cf9 | 1707 | |
3aab8f82 | 1708 | fail: |
86531d6b | 1709 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1710 | f2fs_write_failed(mapping, pos + len); |
1711 | return err; | |
eb47b800 JK |
1712 | } |
1713 | ||
a1dd3c13 JK |
1714 | static int f2fs_write_end(struct file *file, |
1715 | struct address_space *mapping, | |
1716 | loff_t pos, unsigned len, unsigned copied, | |
1717 | struct page *page, void *fsdata) | |
1718 | { | |
1719 | struct inode *inode = page->mapping->host; | |
1720 | ||
dfb2bf38 CY |
1721 | trace_f2fs_write_end(inode, pos, len, copied); |
1722 | ||
34ba94ba | 1723 | set_page_dirty(page); |
a1dd3c13 JK |
1724 | |
1725 | if (pos + copied > i_size_read(inode)) { | |
1726 | i_size_write(inode, pos + copied); | |
1727 | mark_inode_dirty(inode); | |
a1dd3c13 JK |
1728 | } |
1729 | ||
75c3c8bc | 1730 | f2fs_put_page(page, 1); |
d0239e1b | 1731 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1732 | return copied; |
1733 | } | |
1734 | ||
6f673763 OS |
1735 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1736 | loff_t offset) | |
944fcfc1 JK |
1737 | { |
1738 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1739 | |
944fcfc1 JK |
1740 | if (offset & blocksize_mask) |
1741 | return -EINVAL; | |
1742 | ||
5b46f25d AV |
1743 | if (iov_iter_alignment(iter) & blocksize_mask) |
1744 | return -EINVAL; | |
1745 | ||
944fcfc1 JK |
1746 | return 0; |
1747 | } | |
1748 | ||
c8b8e32d | 1749 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 1750 | { |
b439b103 | 1751 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1752 | struct inode *inode = mapping->host; |
1753 | size_t count = iov_iter_count(iter); | |
c8b8e32d | 1754 | loff_t offset = iocb->ki_pos; |
3aab8f82 | 1755 | int err; |
944fcfc1 | 1756 | |
b439b103 | 1757 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1758 | if (err) |
1759 | return err; | |
9ffe0fb5 | 1760 | |
fcc85a4d JK |
1761 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1762 | return 0; | |
1763 | ||
6f673763 | 1764 | trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter)); |
70407fad | 1765 | |
c8b8e32d | 1766 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
6bfc4919 JK |
1767 | if (iov_iter_rw(iter) == WRITE) { |
1768 | if (err > 0) | |
1769 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); | |
1770 | else if (err < 0) | |
1771 | f2fs_write_failed(mapping, offset + count); | |
1772 | } | |
70407fad | 1773 | |
6f673763 | 1774 | trace_f2fs_direct_IO_exit(inode, offset, count, iov_iter_rw(iter), err); |
70407fad | 1775 | |
3aab8f82 | 1776 | return err; |
eb47b800 JK |
1777 | } |
1778 | ||
487261f3 CY |
1779 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1780 | unsigned int length) | |
eb47b800 JK |
1781 | { |
1782 | struct inode *inode = page->mapping->host; | |
487261f3 | 1783 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1784 | |
487261f3 | 1785 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1786 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1787 | return; |
1788 | ||
487261f3 CY |
1789 | if (PageDirty(page)) { |
1790 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1791 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1792 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1793 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1794 | else | |
1795 | inode_dec_dirty_pages(inode); | |
1796 | } | |
decd36b6 CY |
1797 | |
1798 | /* This is atomic written page, keep Private */ | |
1799 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1800 | return; | |
1801 | ||
23dc974e | 1802 | set_page_private(page, 0); |
eb47b800 JK |
1803 | ClearPagePrivate(page); |
1804 | } | |
1805 | ||
487261f3 | 1806 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1807 | { |
f68daeeb JK |
1808 | /* If this is dirty page, keep PagePrivate */ |
1809 | if (PageDirty(page)) | |
1810 | return 0; | |
1811 | ||
decd36b6 CY |
1812 | /* This is atomic written page, keep Private */ |
1813 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1814 | return 0; | |
1815 | ||
23dc974e | 1816 | set_page_private(page, 0); |
eb47b800 | 1817 | ClearPagePrivate(page); |
c3850aa1 | 1818 | return 1; |
eb47b800 JK |
1819 | } |
1820 | ||
1821 | static int f2fs_set_data_page_dirty(struct page *page) | |
1822 | { | |
1823 | struct address_space *mapping = page->mapping; | |
1824 | struct inode *inode = mapping->host; | |
1825 | ||
26c6b887 JK |
1826 | trace_f2fs_set_page_dirty(page, DATA); |
1827 | ||
eb47b800 | 1828 | SetPageUptodate(page); |
34ba94ba | 1829 | |
1e84371f | 1830 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1831 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1832 | register_inmem_page(inode, page); | |
1833 | return 1; | |
1834 | } | |
1835 | /* | |
1836 | * Previously, this page has been registered, we just | |
1837 | * return here. | |
1838 | */ | |
1839 | return 0; | |
34ba94ba JK |
1840 | } |
1841 | ||
eb47b800 JK |
1842 | if (!PageDirty(page)) { |
1843 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1844 | update_dirty_page(inode, page); |
eb47b800 JK |
1845 | return 1; |
1846 | } | |
1847 | return 0; | |
1848 | } | |
1849 | ||
c01e54b7 JK |
1850 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1851 | { | |
454ae7e5 CY |
1852 | struct inode *inode = mapping->host; |
1853 | ||
1d373a0e JK |
1854 | if (f2fs_has_inline_data(inode)) |
1855 | return 0; | |
1856 | ||
1857 | /* make sure allocating whole blocks */ | |
1858 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1859 | filemap_write_and_wait(mapping); | |
1860 | ||
e2b4e2bc | 1861 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1862 | } |
1863 | ||
eb47b800 JK |
1864 | const struct address_space_operations f2fs_dblock_aops = { |
1865 | .readpage = f2fs_read_data_page, | |
1866 | .readpages = f2fs_read_data_pages, | |
1867 | .writepage = f2fs_write_data_page, | |
1868 | .writepages = f2fs_write_data_pages, | |
1869 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1870 | .write_end = f2fs_write_end, |
eb47b800 | 1871 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1872 | .invalidatepage = f2fs_invalidate_page, |
1873 | .releasepage = f2fs_release_page, | |
eb47b800 | 1874 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1875 | .bmap = f2fs_bmap, |
eb47b800 | 1876 | }; |