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> |
c1286ff4 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> |
32cbbe59 | 31 | #include <trace/events/android_fs.h> |
eb47b800 | 32 | |
9e266223 CY |
33 | static bool __is_cp_guaranteed(struct page *page) |
34 | { | |
35 | struct address_space *mapping = page->mapping; | |
36 | struct inode *inode; | |
37 | struct f2fs_sb_info *sbi; | |
38 | ||
39 | if (!mapping) | |
40 | return false; | |
41 | ||
42 | inode = mapping->host; | |
43 | sbi = F2FS_I_SB(inode); | |
44 | ||
45 | if (inode->i_ino == F2FS_META_INO(sbi) || | |
46 | inode->i_ino == F2FS_NODE_INO(sbi) || | |
47 | S_ISDIR(inode->i_mode) || | |
48 | is_cold_data(page)) | |
49 | return true; | |
50 | return false; | |
51 | } | |
52 | ||
4246a0b6 | 53 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 54 | { |
f568849e LT |
55 | struct bio_vec *bvec; |
56 | int i; | |
93dfe2ac | 57 | |
c1286ff4 JK |
58 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
59 | if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) | |
60 | bio->bi_error = -EIO; | |
61 | #endif | |
62 | ||
4375a336 | 63 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 64 | if (bio->bi_error) { |
c1286ff4 | 65 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 66 | } else { |
c1286ff4 | 67 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
68 | return; |
69 | } | |
70 | } | |
71 | ||
12377024 CY |
72 | bio_for_each_segment_all(bvec, bio, i) { |
73 | struct page *page = bvec->bv_page; | |
f1e88660 | 74 | |
4246a0b6 | 75 | if (!bio->bi_error) { |
c1286ff4 JK |
76 | if (!PageUptodate(page)) |
77 | SetPageUptodate(page); | |
f1e88660 JK |
78 | } else { |
79 | ClearPageUptodate(page); | |
80 | SetPageError(page); | |
81 | } | |
82 | unlock_page(page); | |
83 | } | |
f1e88660 JK |
84 | bio_put(bio); |
85 | } | |
86 | ||
4246a0b6 | 87 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 88 | { |
1b1f559f | 89 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
90 | struct bio_vec *bvec; |
91 | int i; | |
93dfe2ac | 92 | |
f568849e | 93 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac | 94 | struct page *page = bvec->bv_page; |
9e266223 | 95 | enum count_type type = WB_DATA_TYPE(page); |
93dfe2ac | 96 | |
c1286ff4 | 97 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 98 | |
4246a0b6 | 99 | if (unlikely(bio->bi_error)) { |
93dfe2ac | 100 | set_bit(AS_EIO, &page->mapping->flags); |
c1286ff4 | 101 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac | 102 | } |
9e266223 CY |
103 | dec_page_count(sbi, type); |
104 | clear_cold_data(page); | |
93dfe2ac | 105 | end_page_writeback(page); |
f568849e | 106 | } |
9e266223 | 107 | if (!get_pages(sbi, F2FS_WB_CP_DATA) && |
c1286ff4 | 108 | wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
109 | wake_up(&sbi->cp_wait); |
110 | ||
111 | bio_put(bio); | |
112 | } | |
113 | ||
07f01079 JK |
114 | /* |
115 | * Return true, if pre_bio's bdev is same as its target device. | |
116 | */ | |
117 | struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, | |
118 | block_t blk_addr, struct bio *bio) | |
119 | { | |
120 | struct block_device *bdev = sbi->sb->s_bdev; | |
121 | int i; | |
122 | ||
123 | for (i = 0; i < sbi->s_ndevs; i++) { | |
124 | if (FDEV(i).start_blk <= blk_addr && | |
125 | FDEV(i).end_blk >= blk_addr) { | |
126 | blk_addr -= FDEV(i).start_blk; | |
127 | bdev = FDEV(i).bdev; | |
128 | break; | |
129 | } | |
130 | } | |
131 | if (bio) { | |
132 | bio->bi_bdev = bdev; | |
133 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); | |
134 | } | |
135 | return bdev; | |
136 | } | |
137 | ||
138 | int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) | |
139 | { | |
140 | int i; | |
141 | ||
142 | for (i = 0; i < sbi->s_ndevs; i++) | |
143 | if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) | |
144 | return i; | |
145 | return 0; | |
146 | } | |
147 | ||
148 | static bool __same_bdev(struct f2fs_sb_info *sbi, | |
149 | block_t blk_addr, struct bio *bio) | |
150 | { | |
151 | return f2fs_target_device(sbi, blk_addr, NULL) == bio->bi_bdev; | |
152 | } | |
153 | ||
940a6d34 GZ |
154 | /* |
155 | * Low-level block read/write IO operations. | |
156 | */ | |
157 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
158 | int npages, bool is_read) | |
159 | { | |
160 | struct bio *bio; | |
161 | ||
740432f8 | 162 | bio = f2fs_bio_alloc(npages); |
940a6d34 | 163 | |
07f01079 | 164 | f2fs_target_device(sbi, blk_addr, bio); |
940a6d34 | 165 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 166 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
167 | |
168 | return bio; | |
169 | } | |
170 | ||
dc45fd9e JK |
171 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
172 | struct bio *bio, enum page_type type) | |
c1286ff4 | 173 | { |
dc45fd9e | 174 | if (!is_read_io(bio_op(bio))) { |
22bbc1ef | 175 | if (f2fs_sb_mounted_blkzoned(sbi->sb) && |
c1286ff4 JK |
176 | current->plug && (type == DATA || type == NODE)) |
177 | blk_finish_plug(current->plug); | |
178 | } | |
dc45fd9e | 179 | submit_bio(0, bio); |
c1286ff4 JK |
180 | } |
181 | ||
458e6197 | 182 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 183 | { |
458e6197 | 184 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
185 | |
186 | if (!io->bio) | |
187 | return; | |
188 | ||
dc45fd9e | 189 | if (is_read_io(fio->op)) |
2ace38e0 | 190 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 191 | else |
2ace38e0 | 192 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 193 | |
dc45fd9e JK |
194 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
195 | ||
196 | __submit_bio(io->sbi, io->bio, fio->type); | |
93dfe2ac JK |
197 | io->bio = NULL; |
198 | } | |
199 | ||
c1286ff4 JK |
200 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
201 | struct page *page, nid_t ino) | |
202 | { | |
203 | struct bio_vec *bvec; | |
204 | struct page *target; | |
205 | int i; | |
206 | ||
207 | if (!io->bio) | |
208 | return false; | |
209 | ||
210 | if (!inode && !page && !ino) | |
211 | return true; | |
212 | ||
213 | bio_for_each_segment_all(bvec, io->bio, i) { | |
214 | ||
215 | if (bvec->bv_page->mapping) | |
216 | target = bvec->bv_page; | |
217 | else | |
218 | target = fscrypt_control_page(bvec->bv_page); | |
219 | ||
220 | if (inode && inode == target->mapping->host) | |
221 | return true; | |
222 | if (page && page == target) | |
223 | return true; | |
224 | if (ino && ino == ino_of_node(target)) | |
225 | return true; | |
226 | } | |
227 | ||
228 | return false; | |
229 | } | |
230 | ||
231 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, | |
232 | struct page *page, nid_t ino, | |
233 | enum page_type type) | |
234 | { | |
235 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
236 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
237 | bool ret; | |
238 | ||
239 | down_read(&io->io_rwsem); | |
240 | ret = __has_merged_page(io, inode, page, ino); | |
241 | up_read(&io->io_rwsem); | |
242 | return ret; | |
243 | } | |
244 | ||
245 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
246 | struct inode *inode, struct page *page, | |
247 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
248 | { |
249 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
250 | struct f2fs_bio_info *io; | |
251 | ||
252 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
253 | ||
df0f8dc0 | 254 | down_write(&io->io_rwsem); |
458e6197 | 255 | |
c1286ff4 JK |
256 | if (!__has_merged_page(io, inode, page, ino)) |
257 | goto out; | |
258 | ||
458e6197 JK |
259 | /* change META to META_FLUSH in the checkpoint procedure */ |
260 | if (type >= META_FLUSH) { | |
261 | io->fio.type = META_FLUSH; | |
dc45fd9e JK |
262 | io->fio.op = REQ_OP_WRITE; |
263 | io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
264 | if (!test_opt(sbi, NOBARRIER)) | |
265 | io->fio.op_flags |= REQ_FUA; | |
458e6197 JK |
266 | } |
267 | __submit_merged_bio(io); | |
c1286ff4 | 268 | out: |
df0f8dc0 | 269 | up_write(&io->io_rwsem); |
93dfe2ac JK |
270 | } |
271 | ||
c1286ff4 JK |
272 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
273 | int rw) | |
274 | { | |
275 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
276 | } | |
277 | ||
278 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
279 | struct inode *inode, struct page *page, | |
280 | nid_t ino, enum page_type type, int rw) | |
281 | { | |
282 | if (has_merged_page(sbi, inode, page, ino, type)) | |
283 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
284 | } | |
285 | ||
286 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) | |
287 | { | |
288 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
289 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
290 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
291 | } | |
292 | ||
93dfe2ac JK |
293 | /* |
294 | * Fill the locked page with data located in the block address. | |
295 | * Return unlocked page. | |
296 | */ | |
05ca3632 | 297 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 298 | { |
93dfe2ac | 299 | struct bio *bio; |
c1286ff4 JK |
300 | struct page *page = fio->encrypted_page ? |
301 | fio->encrypted_page : fio->page; | |
93dfe2ac | 302 | |
2ace38e0 | 303 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 304 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
305 | |
306 | /* Allocate a new bio */ | |
dc45fd9e | 307 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 308 | |
c1286ff4 | 309 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 310 | bio_put(bio); |
93dfe2ac JK |
311 | return -EFAULT; |
312 | } | |
dc45fd9e | 313 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 314 | |
dc45fd9e | 315 | __submit_bio(fio->sbi, bio, fio->type); |
93dfe2ac JK |
316 | return 0; |
317 | } | |
318 | ||
05ca3632 | 319 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 320 | { |
05ca3632 | 321 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 322 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 323 | struct f2fs_bio_info *io; |
dc45fd9e | 324 | bool is_read = is_read_io(fio->op); |
4375a336 | 325 | struct page *bio_page; |
93dfe2ac | 326 | |
940a6d34 | 327 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 328 | |
c1286ff4 JK |
329 | if (fio->old_blkaddr != NEW_ADDR) |
330 | verify_block_addr(sbi, fio->old_blkaddr); | |
331 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 332 | |
9e266223 CY |
333 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
334 | ||
335 | if (!is_read) | |
336 | inc_page_count(sbi, WB_DATA_TYPE(bio_page)); | |
337 | ||
df0f8dc0 | 338 | down_write(&io->io_rwsem); |
93dfe2ac | 339 | |
c1286ff4 | 340 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
dc45fd9e | 341 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) || |
07f01079 | 342 | !__same_bdev(sbi, fio->new_blkaddr, io->bio))) |
458e6197 | 343 | __submit_merged_bio(io); |
93dfe2ac JK |
344 | alloc_new: |
345 | if (io->bio == NULL) { | |
c1286ff4 | 346 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
04030d21 | 347 | BIO_MAX_PAGES, is_read); |
458e6197 | 348 | io->fio = *fio; |
93dfe2ac JK |
349 | } |
350 | ||
c1286ff4 JK |
351 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
352 | PAGE_SIZE) { | |
458e6197 | 353 | __submit_merged_bio(io); |
93dfe2ac JK |
354 | goto alloc_new; |
355 | } | |
356 | ||
c1286ff4 | 357 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 358 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 359 | |
df0f8dc0 | 360 | up_write(&io->io_rwsem); |
05ca3632 | 361 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
362 | } |
363 | ||
c1286ff4 JK |
364 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
365 | { | |
366 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
367 | __le32 *addr_array; | |
368 | ||
369 | /* Get physical address of data block */ | |
370 | addr_array = blkaddr_in_node(rn); | |
371 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
372 | } | |
373 | ||
0a8165d7 | 374 | /* |
eb47b800 JK |
375 | * Lock ordering for the change of data block address: |
376 | * ->data_page | |
377 | * ->node_page | |
378 | * update block addresses in the node page | |
379 | */ | |
216a620a | 380 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 381 | { |
c1286ff4 JK |
382 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
383 | __set_data_blkaddr(dn); | |
384 | if (set_page_dirty(dn->node_page)) | |
385 | dn->node_changed = true; | |
386 | } | |
eb47b800 | 387 | |
c1286ff4 JK |
388 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
389 | { | |
390 | dn->data_blkaddr = blkaddr; | |
391 | set_data_blkaddr(dn); | |
392 | f2fs_update_extent_cache(dn); | |
eb47b800 JK |
393 | } |
394 | ||
c1286ff4 JK |
395 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
396 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 397 | { |
4081363f | 398 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 399 | |
c1286ff4 JK |
400 | if (!count) |
401 | return 0; | |
402 | ||
403 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) | |
eb47b800 | 404 | return -EPERM; |
c1286ff4 | 405 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
406 | return -ENOSPC; |
407 | ||
c1286ff4 JK |
408 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
409 | dn->ofs_in_node, count); | |
c01e2853 | 410 | |
c1286ff4 JK |
411 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
412 | ||
413 | for (; count > 0; dn->ofs_in_node++) { | |
414 | block_t blkaddr = | |
415 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
416 | if (blkaddr == NULL_ADDR) { | |
417 | dn->data_blkaddr = NEW_ADDR; | |
418 | __set_data_blkaddr(dn); | |
419 | count--; | |
420 | } | |
421 | } | |
422 | ||
423 | if (set_page_dirty(dn->node_page)) | |
424 | dn->node_changed = true; | |
eb47b800 JK |
425 | return 0; |
426 | } | |
427 | ||
c1286ff4 JK |
428 | /* Should keep dn->ofs_in_node unchanged */ |
429 | int reserve_new_block(struct dnode_of_data *dn) | |
430 | { | |
431 | unsigned int ofs_in_node = dn->ofs_in_node; | |
432 | int ret; | |
433 | ||
434 | ret = reserve_new_blocks(dn, 1); | |
435 | dn->ofs_in_node = ofs_in_node; | |
436 | return ret; | |
437 | } | |
438 | ||
b600965c HL |
439 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
440 | { | |
441 | bool need_put = dn->inode_page ? false : true; | |
442 | int err; | |
443 | ||
444 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
445 | if (err) | |
446 | return err; | |
a8865372 | 447 | |
b600965c HL |
448 | if (dn->data_blkaddr == NULL_ADDR) |
449 | err = reserve_new_block(dn); | |
a8865372 | 450 | if (err || need_put) |
b600965c HL |
451 | f2fs_put_dnode(dn); |
452 | return err; | |
453 | } | |
454 | ||
759af1c9 | 455 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 456 | { |
028a41e8 | 457 | struct extent_info ei; |
759af1c9 | 458 | struct inode *inode = dn->inode; |
028a41e8 | 459 | |
759af1c9 FL |
460 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
461 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
462 | return 0; | |
429511cd | 463 | } |
028a41e8 | 464 | |
759af1c9 | 465 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
466 | } |
467 | ||
a56c7c6f | 468 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
dc45fd9e | 469 | int op_flags, bool for_write) |
eb47b800 | 470 | { |
eb47b800 JK |
471 | struct address_space *mapping = inode->i_mapping; |
472 | struct dnode_of_data dn; | |
473 | struct page *page; | |
cb3bc9ee | 474 | struct extent_info ei; |
eb47b800 | 475 | int err; |
cf04e8eb | 476 | struct f2fs_io_info fio = { |
05ca3632 | 477 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 478 | .type = DATA, |
dc45fd9e JK |
479 | .op = REQ_OP_READ, |
480 | .op_flags = op_flags, | |
4375a336 | 481 | .encrypted_page = NULL, |
cf04e8eb | 482 | }; |
eb47b800 | 483 | |
4375a336 JK |
484 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
485 | return read_mapping_page(mapping, index, NULL); | |
486 | ||
a56c7c6f | 487 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
488 | if (!page) |
489 | return ERR_PTR(-ENOMEM); | |
490 | ||
cb3bc9ee CY |
491 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
492 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
493 | goto got_it; | |
494 | } | |
495 | ||
eb47b800 | 496 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 497 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
498 | if (err) |
499 | goto put_err; | |
eb47b800 JK |
500 | f2fs_put_dnode(&dn); |
501 | ||
6bacf52f | 502 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
503 | err = -ENOENT; |
504 | goto put_err; | |
650495de | 505 | } |
cb3bc9ee | 506 | got_it: |
43f3eae1 JK |
507 | if (PageUptodate(page)) { |
508 | unlock_page(page); | |
eb47b800 | 509 | return page; |
43f3eae1 | 510 | } |
eb47b800 | 511 | |
d59ff4df JK |
512 | /* |
513 | * A new dentry page is allocated but not able to be written, since its | |
514 | * new inode page couldn't be allocated due to -ENOSPC. | |
515 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
516 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
517 | */ | |
518 | if (dn.data_blkaddr == NEW_ADDR) { | |
c1286ff4 JK |
519 | zero_user_segment(page, 0, PAGE_SIZE); |
520 | if (!PageUptodate(page)) | |
521 | SetPageUptodate(page); | |
43f3eae1 | 522 | unlock_page(page); |
d59ff4df JK |
523 | return page; |
524 | } | |
eb47b800 | 525 | |
c1286ff4 | 526 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
527 | fio.page = page; |
528 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 529 | if (err) |
86531d6b | 530 | goto put_err; |
43f3eae1 | 531 | return page; |
86531d6b JK |
532 | |
533 | put_err: | |
534 | f2fs_put_page(page, 1); | |
535 | return ERR_PTR(err); | |
43f3eae1 JK |
536 | } |
537 | ||
538 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
539 | { | |
540 | struct address_space *mapping = inode->i_mapping; | |
541 | struct page *page; | |
542 | ||
543 | page = find_get_page(mapping, index); | |
544 | if (page && PageUptodate(page)) | |
545 | return page; | |
546 | f2fs_put_page(page, 0); | |
547 | ||
dc45fd9e | 548 | page = get_read_data_page(inode, index, REQ_SYNC, false); |
43f3eae1 JK |
549 | if (IS_ERR(page)) |
550 | return page; | |
551 | ||
552 | if (PageUptodate(page)) | |
553 | return page; | |
554 | ||
555 | wait_on_page_locked(page); | |
556 | if (unlikely(!PageUptodate(page))) { | |
557 | f2fs_put_page(page, 0); | |
558 | return ERR_PTR(-EIO); | |
559 | } | |
560 | return page; | |
561 | } | |
562 | ||
563 | /* | |
564 | * If it tries to access a hole, return an error. | |
565 | * Because, the callers, functions in dir.c and GC, should be able to know | |
566 | * whether this page exists or not. | |
567 | */ | |
a56c7c6f JK |
568 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
569 | bool for_write) | |
43f3eae1 JK |
570 | { |
571 | struct address_space *mapping = inode->i_mapping; | |
572 | struct page *page; | |
573 | repeat: | |
dc45fd9e | 574 | page = get_read_data_page(inode, index, REQ_SYNC, for_write); |
43f3eae1 JK |
575 | if (IS_ERR(page)) |
576 | return page; | |
393ff91f | 577 | |
43f3eae1 | 578 | /* wait for read completion */ |
393ff91f | 579 | lock_page(page); |
6bacf52f | 580 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
581 | f2fs_put_page(page, 1); |
582 | goto repeat; | |
eb47b800 | 583 | } |
c1286ff4 JK |
584 | if (unlikely(!PageUptodate(page))) { |
585 | f2fs_put_page(page, 1); | |
586 | return ERR_PTR(-EIO); | |
587 | } | |
eb47b800 JK |
588 | return page; |
589 | } | |
590 | ||
0a8165d7 | 591 | /* |
eb47b800 JK |
592 | * Caller ensures that this data page is never allocated. |
593 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 594 | * |
4f4124d0 CY |
595 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
596 | * f2fs_unlock_op(). | |
470f00e9 CY |
597 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
598 | * ipage should be released by this function. | |
eb47b800 | 599 | */ |
64aa7ed9 | 600 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 601 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 602 | { |
eb47b800 JK |
603 | struct address_space *mapping = inode->i_mapping; |
604 | struct page *page; | |
605 | struct dnode_of_data dn; | |
606 | int err; | |
c1286ff4 | 607 | |
a56c7c6f | 608 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
609 | if (!page) { |
610 | /* | |
611 | * before exiting, we should make sure ipage will be released | |
612 | * if any error occur. | |
613 | */ | |
614 | f2fs_put_page(ipage, 1); | |
01f28610 | 615 | return ERR_PTR(-ENOMEM); |
470f00e9 | 616 | } |
eb47b800 | 617 | |
a8865372 | 618 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 619 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
620 | if (err) { |
621 | f2fs_put_page(page, 1); | |
eb47b800 | 622 | return ERR_PTR(err); |
a8865372 | 623 | } |
01f28610 JK |
624 | if (!ipage) |
625 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
626 | |
627 | if (PageUptodate(page)) | |
01f28610 | 628 | goto got_it; |
eb47b800 JK |
629 | |
630 | if (dn.data_blkaddr == NEW_ADDR) { | |
c1286ff4 JK |
631 | zero_user_segment(page, 0, PAGE_SIZE); |
632 | if (!PageUptodate(page)) | |
633 | SetPageUptodate(page); | |
eb47b800 | 634 | } else { |
4375a336 | 635 | f2fs_put_page(page, 1); |
a8865372 | 636 | |
c1286ff4 JK |
637 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
638 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
639 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 640 | if (IS_ERR(page)) |
c1286ff4 | 641 | return page; |
eb47b800 | 642 | } |
01f28610 | 643 | got_it: |
9edcdabf | 644 | if (new_i_size && i_size_read(inode) < |
c1286ff4 JK |
645 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
646 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); | |
eb47b800 JK |
647 | return page; |
648 | } | |
649 | ||
bfad7c2d JK |
650 | static int __allocate_data_block(struct dnode_of_data *dn) |
651 | { | |
4081363f | 652 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 653 | struct f2fs_summary sum; |
bfad7c2d | 654 | struct node_info ni; |
976e4c50 | 655 | pgoff_t fofs; |
c1286ff4 | 656 | blkcnt_t count = 1; |
bfad7c2d | 657 | |
c1286ff4 | 658 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 659 | return -EPERM; |
df6136ef CY |
660 | |
661 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
662 | if (dn->data_blkaddr == NEW_ADDR) | |
663 | goto alloc; | |
664 | ||
c1286ff4 | 665 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
666 | return -ENOSPC; |
667 | ||
df6136ef | 668 | alloc: |
bfad7c2d JK |
669 | get_node_info(sbi, dn->nid, &ni); |
670 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
671 | ||
df6136ef | 672 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
00e5a211 | 673 | &sum, CURSEG_WARM_DATA); |
216a620a | 674 | set_data_blkaddr(dn); |
bfad7c2d | 675 | |
976e4c50 | 676 | /* update i_size */ |
c1286ff4 | 677 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 678 | dn->ofs_in_node; |
c1286ff4 JK |
679 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
680 | f2fs_i_size_write(dn->inode, | |
681 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); | |
bfad7c2d JK |
682 | return 0; |
683 | } | |
684 | ||
8b2c7581 JK |
685 | static inline bool __force_buffered_io(struct inode *inode, int rw) |
686 | { | |
687 | return ((f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) || | |
688 | (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS)) || | |
689 | F2FS_I_SB(inode)->s_ndevs); | |
690 | } | |
691 | ||
bd8e4154 | 692 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 693 | { |
c1286ff4 JK |
694 | struct inode *inode = file_inode(iocb->ki_filp); |
695 | struct f2fs_map_blocks map; | |
bd8e4154 | 696 | int err = 0; |
f9811703 | 697 | |
c1286ff4 JK |
698 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
699 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); | |
700 | if (map.m_len > map.m_lblk) | |
701 | map.m_len -= map.m_lblk; | |
702 | else | |
703 | map.m_len = 0; | |
59b802e5 | 704 | |
c1286ff4 | 705 | map.m_next_pgofs = NULL; |
59b802e5 | 706 | |
c1286ff4 | 707 | if (iocb->ki_flags & IOCB_DIRECT) { |
bd8e4154 JK |
708 | err = f2fs_convert_inline_inode(inode); |
709 | if (err) | |
710 | return err; | |
8b2c7581 JK |
711 | return f2fs_map_blocks(inode, &map, 1, |
712 | __force_buffered_io(inode, WRITE) ? | |
713 | F2FS_GET_BLOCK_PRE_AIO : | |
714 | F2FS_GET_BLOCK_PRE_DIO); | |
59b802e5 | 715 | } |
c1286ff4 | 716 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { |
bd8e4154 JK |
717 | err = f2fs_convert_inline_inode(inode); |
718 | if (err) | |
719 | return err; | |
c1286ff4 JK |
720 | } |
721 | if (!f2fs_has_inline_data(inode)) | |
722 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
bd8e4154 | 723 | return err; |
59b802e5 JK |
724 | } |
725 | ||
0a8165d7 | 726 | /* |
003a3e1d JK |
727 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
728 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
729 | * If original data blocks are allocated, then give them to blockdev. |
730 | * Otherwise, | |
731 | * a. preallocate requested block addresses | |
732 | * b. do not use extent cache for better performance | |
733 | * c. give the block addresses to blockdev | |
eb47b800 | 734 | */ |
c1286ff4 | 735 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 736 | int create, int flag) |
eb47b800 | 737 | { |
003a3e1d | 738 | unsigned int maxblocks = map->m_len; |
eb47b800 | 739 | struct dnode_of_data dn; |
f9811703 | 740 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
c1286ff4 JK |
741 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
742 | pgoff_t pgofs, end_offset, end; | |
bfad7c2d | 743 | int err = 0, ofs = 1; |
c1286ff4 JK |
744 | unsigned int ofs_in_node, last_ofs_in_node; |
745 | blkcnt_t prealloc; | |
a2e7d1bf | 746 | struct extent_info ei; |
c1286ff4 JK |
747 | block_t blkaddr; |
748 | ||
749 | if (!maxblocks) | |
750 | return 0; | |
eb47b800 | 751 | |
003a3e1d JK |
752 | map->m_len = 0; |
753 | map->m_flags = 0; | |
754 | ||
755 | /* it only supports block size == page size */ | |
756 | pgofs = (pgoff_t)map->m_lblk; | |
c1286ff4 | 757 | end = pgofs + maxblocks; |
eb47b800 | 758 | |
c1286ff4 | 759 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
760 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
761 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
762 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 763 | goto out; |
a2e7d1bf | 764 | } |
bfad7c2d | 765 | |
c1286ff4 | 766 | next_dnode: |
59b802e5 | 767 | if (create) |
c1286ff4 | 768 | f2fs_lock_op(sbi); |
eb47b800 JK |
769 | |
770 | /* When reading holes, we need its node page */ | |
771 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 772 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 773 | if (err) { |
c1286ff4 JK |
774 | if (flag == F2FS_GET_BLOCK_BMAP) |
775 | map->m_pblk = 0; | |
776 | if (err == -ENOENT) { | |
bfad7c2d | 777 | err = 0; |
c1286ff4 JK |
778 | if (map->m_next_pgofs) |
779 | *map->m_next_pgofs = | |
780 | get_next_page_offset(&dn, pgofs); | |
781 | } | |
bfad7c2d | 782 | goto unlock_out; |
848753aa | 783 | } |
973163fc | 784 | |
c1286ff4 | 785 | prealloc = 0; |
b3441f8c | 786 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
c1286ff4 JK |
787 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
788 | ||
789 | next_block: | |
790 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
791 | ||
792 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 793 | if (create) { |
f9811703 CY |
794 | if (unlikely(f2fs_cp_error(sbi))) { |
795 | err = -EIO; | |
c1286ff4 JK |
796 | goto sync_out; |
797 | } | |
798 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { | |
799 | if (blkaddr == NULL_ADDR) { | |
800 | prealloc++; | |
801 | last_ofs_in_node = dn.ofs_in_node; | |
802 | } | |
803 | } else { | |
804 | err = __allocate_data_block(&dn); | |
332f40b4 | 805 | if (!err) |
c1286ff4 | 806 | set_inode_flag(inode, FI_APPEND_WRITE); |
f9811703 | 807 | } |
973163fc | 808 | if (err) |
c1286ff4 | 809 | goto sync_out; |
973163fc | 810 | map->m_flags = F2FS_MAP_NEW; |
c1286ff4 | 811 | blkaddr = dn.data_blkaddr; |
973163fc | 812 | } else { |
c1286ff4 JK |
813 | if (flag == F2FS_GET_BLOCK_BMAP) { |
814 | map->m_pblk = 0; | |
815 | goto sync_out; | |
973163fc | 816 | } |
c1286ff4 JK |
817 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
818 | blkaddr == NULL_ADDR) { | |
819 | if (map->m_next_pgofs) | |
820 | *map->m_next_pgofs = pgofs + 1; | |
821 | } | |
822 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
823 | blkaddr != NEW_ADDR) | |
824 | goto sync_out; | |
e2b4e2bc | 825 | } |
e2b4e2bc | 826 | } |
eb47b800 | 827 | |
c1286ff4 JK |
828 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
829 | goto skip; | |
830 | ||
831 | if (map->m_len == 0) { | |
832 | /* preallocated unwritten block should be mapped for fiemap. */ | |
833 | if (blkaddr == NEW_ADDR) | |
834 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
835 | map->m_flags |= F2FS_MAP_MAPPED; | |
836 | ||
837 | map->m_pblk = blkaddr; | |
838 | map->m_len = 1; | |
839 | } else if ((map->m_pblk != NEW_ADDR && | |
840 | blkaddr == (map->m_pblk + ofs)) || | |
841 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || | |
842 | flag == F2FS_GET_BLOCK_PRE_DIO) { | |
843 | ofs++; | |
844 | map->m_len++; | |
845 | } else { | |
846 | goto sync_out; | |
847 | } | |
bfad7c2d | 848 | |
c1286ff4 | 849 | skip: |
bfad7c2d JK |
850 | dn.ofs_in_node++; |
851 | pgofs++; | |
852 | ||
c1286ff4 JK |
853 | /* preallocate blocks in batch for one dnode page */ |
854 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
855 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
bfad7c2d | 856 | |
c1286ff4 JK |
857 | dn.ofs_in_node = ofs_in_node; |
858 | err = reserve_new_blocks(&dn, prealloc); | |
859 | if (err) | |
860 | goto sync_out; | |
e2b4e2bc | 861 | |
c1286ff4 JK |
862 | map->m_len += dn.ofs_in_node - ofs_in_node; |
863 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
864 | err = -ENOSPC; | |
865 | goto sync_out; | |
866 | } | |
867 | dn.ofs_in_node = end_offset; | |
bfad7c2d | 868 | } |
eb47b800 | 869 | |
c1286ff4 JK |
870 | if (pgofs >= end) |
871 | goto sync_out; | |
872 | else if (dn.ofs_in_node < end_offset) | |
873 | goto next_block; | |
973163fc | 874 | |
c1286ff4 | 875 | f2fs_put_dnode(&dn); |
973163fc | 876 | |
c1286ff4 JK |
877 | if (create) { |
878 | f2fs_unlock_op(sbi); | |
332f40b4 | 879 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 880 | } |
c1286ff4 JK |
881 | goto next_dnode; |
882 | ||
bfad7c2d | 883 | sync_out: |
eb47b800 | 884 | f2fs_put_dnode(&dn); |
bfad7c2d | 885 | unlock_out: |
c1286ff4 JK |
886 | if (create) { |
887 | f2fs_unlock_op(sbi); | |
332f40b4 | 888 | f2fs_balance_fs(sbi, dn.node_changed); |
c1286ff4 | 889 | } |
bfad7c2d | 890 | out: |
003a3e1d | 891 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 892 | return err; |
eb47b800 JK |
893 | } |
894 | ||
003a3e1d | 895 | static int __get_data_block(struct inode *inode, sector_t iblock, |
c1286ff4 JK |
896 | struct buffer_head *bh, int create, int flag, |
897 | pgoff_t *next_pgofs) | |
003a3e1d JK |
898 | { |
899 | struct f2fs_map_blocks map; | |
bd8e4154 | 900 | int err; |
003a3e1d JK |
901 | |
902 | map.m_lblk = iblock; | |
903 | map.m_len = bh->b_size >> inode->i_blkbits; | |
c1286ff4 | 904 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 905 | |
bd8e4154 JK |
906 | err = f2fs_map_blocks(inode, &map, create, flag); |
907 | if (!err) { | |
003a3e1d JK |
908 | map_bh(bh, inode->i_sb, map.m_pblk); |
909 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
910 | bh->b_size = map.m_len << inode->i_blkbits; | |
911 | } | |
bd8e4154 | 912 | return err; |
003a3e1d JK |
913 | } |
914 | ||
ccfb3000 | 915 | static int get_data_block(struct inode *inode, sector_t iblock, |
c1286ff4 JK |
916 | struct buffer_head *bh_result, int create, int flag, |
917 | pgoff_t *next_pgofs) | |
e2b4e2bc | 918 | { |
c1286ff4 JK |
919 | return __get_data_block(inode, iblock, bh_result, create, |
920 | flag, next_pgofs); | |
e2b4e2bc CY |
921 | } |
922 | ||
923 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
924 | struct buffer_head *bh_result, int create) |
925 | { | |
e2b4e2bc | 926 | return __get_data_block(inode, iblock, bh_result, create, |
c1286ff4 | 927 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
928 | } |
929 | ||
e2b4e2bc | 930 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
931 | struct buffer_head *bh_result, int create) |
932 | { | |
c1286ff4 JK |
933 | /* Block number less than F2FS MAX BLOCKS */ |
934 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) | |
935 | return -EFBIG; | |
936 | ||
e2b4e2bc | 937 | return __get_data_block(inode, iblock, bh_result, create, |
c1286ff4 | 938 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
939 | } |
940 | ||
7f63eb77 JK |
941 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
942 | { | |
943 | return (offset >> inode->i_blkbits); | |
944 | } | |
945 | ||
946 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
947 | { | |
948 | return (blk << inode->i_blkbits); | |
949 | } | |
950 | ||
9ab70134 JK |
951 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
952 | u64 start, u64 len) | |
953 | { | |
7f63eb77 JK |
954 | struct buffer_head map_bh; |
955 | sector_t start_blk, last_blk; | |
c1286ff4 | 956 | pgoff_t next_pgofs; |
7f63eb77 JK |
957 | u64 logical = 0, phys = 0, size = 0; |
958 | u32 flags = 0; | |
7f63eb77 JK |
959 | int ret = 0; |
960 | ||
961 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
962 | if (ret) | |
963 | return ret; | |
964 | ||
67f8cf3c JK |
965 | if (f2fs_has_inline_data(inode)) { |
966 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
967 | if (ret != -EAGAIN) | |
968 | return ret; | |
969 | } | |
970 | ||
c1286ff4 | 971 | inode_lock(inode); |
7f63eb77 | 972 | |
7f63eb77 JK |
973 | if (logical_to_blk(inode, len) == 0) |
974 | len = blk_to_logical(inode, 1); | |
975 | ||
976 | start_blk = logical_to_blk(inode, start); | |
977 | last_blk = logical_to_blk(inode, start + len - 1); | |
c1286ff4 | 978 | |
7f63eb77 JK |
979 | next: |
980 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
981 | map_bh.b_size = len; | |
982 | ||
e2b4e2bc | 983 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
c1286ff4 | 984 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
985 | if (ret) |
986 | goto out; | |
987 | ||
988 | /* HOLE */ | |
989 | if (!buffer_mapped(&map_bh)) { | |
c1286ff4 | 990 | start_blk = next_pgofs; |
9e3d0bf6 CY |
991 | |
992 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
993 | F2FS_I_SB(inode)->max_file_blocks)) | |
c1286ff4 | 994 | goto prep_next; |
9e3d0bf6 | 995 | |
c1286ff4 JK |
996 | flags |= FIEMAP_EXTENT_LAST; |
997 | } | |
7f63eb77 | 998 | |
c1286ff4 JK |
999 | if (size) { |
1000 | if (f2fs_encrypted_inode(inode)) | |
1001 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
7f63eb77 | 1002 | |
c1286ff4 JK |
1003 | ret = fiemap_fill_next_extent(fieinfo, logical, |
1004 | phys, size, flags); | |
1005 | } | |
7f63eb77 | 1006 | |
c1286ff4 JK |
1007 | if (start_blk > last_blk || ret) |
1008 | goto out; | |
7f63eb77 | 1009 | |
c1286ff4 JK |
1010 | logical = blk_to_logical(inode, start_blk); |
1011 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
1012 | size = map_bh.b_size; | |
1013 | flags = 0; | |
1014 | if (buffer_unwritten(&map_bh)) | |
1015 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 1016 | |
c1286ff4 JK |
1017 | start_blk += logical_to_blk(inode, size); |
1018 | ||
1019 | prep_next: | |
7f63eb77 JK |
1020 | cond_resched(); |
1021 | if (fatal_signal_pending(current)) | |
1022 | ret = -EINTR; | |
1023 | else | |
1024 | goto next; | |
1025 | out: | |
1026 | if (ret == 1) | |
1027 | ret = 0; | |
1028 | ||
c1286ff4 | 1029 | inode_unlock(inode); |
7f63eb77 | 1030 | return ret; |
9ab70134 JK |
1031 | } |
1032 | ||
c1286ff4 JK |
1033 | static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
1034 | unsigned nr_pages) | |
1035 | { | |
1036 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1037 | struct fscrypt_ctx *ctx = NULL; | |
c1286ff4 JK |
1038 | struct bio *bio; |
1039 | ||
1040 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1041 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
1042 | if (IS_ERR(ctx)) | |
1043 | return ERR_CAST(ctx); | |
1044 | ||
1045 | /* wait the page to be moved by cleaning */ | |
1046 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
1047 | } | |
1048 | ||
1049 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
1050 | if (!bio) { | |
1051 | if (ctx) | |
1052 | fscrypt_release_ctx(ctx); | |
1053 | return ERR_PTR(-ENOMEM); | |
1054 | } | |
07f01079 | 1055 | f2fs_target_device(sbi, blkaddr, bio); |
c1286ff4 JK |
1056 | bio->bi_end_io = f2fs_read_end_io; |
1057 | bio->bi_private = ctx; | |
1058 | ||
1059 | return bio; | |
1060 | } | |
1061 | ||
f1e88660 JK |
1062 | /* |
1063 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1064 | * Major change was from block_size == page_size in f2fs by default. | |
1065 | */ | |
1066 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1067 | struct list_head *pages, struct page *page, | |
1068 | unsigned nr_pages) | |
1069 | { | |
1070 | struct bio *bio = NULL; | |
1071 | unsigned page_idx; | |
1072 | sector_t last_block_in_bio = 0; | |
1073 | struct inode *inode = mapping->host; | |
1074 | const unsigned blkbits = inode->i_blkbits; | |
1075 | const unsigned blocksize = 1 << blkbits; | |
1076 | sector_t block_in_file; | |
1077 | sector_t last_block; | |
1078 | sector_t last_block_in_file; | |
1079 | sector_t block_nr; | |
f1e88660 JK |
1080 | struct f2fs_map_blocks map; |
1081 | ||
1082 | map.m_pblk = 0; | |
1083 | map.m_lblk = 0; | |
1084 | map.m_len = 0; | |
1085 | map.m_flags = 0; | |
c1286ff4 | 1086 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1087 | |
1088 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1089 | ||
1090 | prefetchw(&page->flags); | |
1091 | if (pages) { | |
1092 | page = list_entry(pages->prev, struct page, lru); | |
1093 | list_del(&page->lru); | |
1094 | if (add_to_page_cache_lru(page, mapping, | |
1095 | page->index, GFP_KERNEL)) | |
1096 | goto next_page; | |
1097 | } | |
1098 | ||
1099 | block_in_file = (sector_t)page->index; | |
1100 | last_block = block_in_file + nr_pages; | |
1101 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1102 | blkbits; | |
1103 | if (last_block > last_block_in_file) | |
1104 | last_block = last_block_in_file; | |
1105 | ||
1106 | /* | |
1107 | * Map blocks using the previous result first. | |
1108 | */ | |
1109 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1110 | block_in_file > map.m_lblk && | |
1111 | block_in_file < (map.m_lblk + map.m_len)) | |
1112 | goto got_it; | |
1113 | ||
1114 | /* | |
1115 | * Then do more f2fs_map_blocks() calls until we are | |
1116 | * done with this page. | |
1117 | */ | |
1118 | map.m_flags = 0; | |
1119 | ||
1120 | if (block_in_file < last_block) { | |
1121 | map.m_lblk = block_in_file; | |
1122 | map.m_len = last_block - block_in_file; | |
1123 | ||
46c9e141 | 1124 | if (f2fs_map_blocks(inode, &map, 0, |
c1286ff4 | 1125 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1126 | goto set_error_page; |
1127 | } | |
1128 | got_it: | |
1129 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1130 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1131 | SetPageMappedToDisk(page); | |
1132 | ||
1133 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1134 | SetPageUptodate(page); | |
1135 | goto confused; | |
1136 | } | |
1137 | } else { | |
c1286ff4 JK |
1138 | zero_user_segment(page, 0, PAGE_SIZE); |
1139 | if (!PageUptodate(page)) | |
1140 | SetPageUptodate(page); | |
f1e88660 JK |
1141 | unlock_page(page); |
1142 | goto next_page; | |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * This page will go to BIO. Do we need to send this | |
1147 | * BIO off first? | |
1148 | */ | |
07f01079 JK |
1149 | if (bio && (last_block_in_bio != block_nr - 1 || |
1150 | !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) { | |
f1e88660 | 1151 | submit_and_realloc: |
dc45fd9e | 1152 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1153 | bio = NULL; |
1154 | } | |
1155 | if (bio == NULL) { | |
c1286ff4 JK |
1156 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1157 | if (IS_ERR(bio)) { | |
1158 | bio = NULL; | |
f1e88660 | 1159 | goto set_error_page; |
4375a336 | 1160 | } |
dc45fd9e | 1161 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1162 | } |
1163 | ||
1164 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1165 | goto submit_and_realloc; | |
1166 | ||
1167 | last_block_in_bio = block_nr; | |
1168 | goto next_page; | |
1169 | set_error_page: | |
1170 | SetPageError(page); | |
c1286ff4 | 1171 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1172 | unlock_page(page); |
1173 | goto next_page; | |
1174 | confused: | |
1175 | if (bio) { | |
dc45fd9e | 1176 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1177 | bio = NULL; |
1178 | } | |
1179 | unlock_page(page); | |
1180 | next_page: | |
1181 | if (pages) | |
c1286ff4 | 1182 | put_page(page); |
f1e88660 JK |
1183 | } |
1184 | BUG_ON(pages && !list_empty(pages)); | |
1185 | if (bio) | |
dc45fd9e | 1186 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1187 | return 0; |
1188 | } | |
1189 | ||
eb47b800 JK |
1190 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1191 | { | |
9ffe0fb5 | 1192 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1193 | int ret = -EAGAIN; |
9ffe0fb5 | 1194 | |
c20e89cd CY |
1195 | trace_f2fs_readpage(page, DATA); |
1196 | ||
e1c42045 | 1197 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1198 | if (f2fs_has_inline_data(inode)) |
1199 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1200 | if (ret == -EAGAIN) |
f1e88660 | 1201 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1202 | return ret; |
eb47b800 JK |
1203 | } |
1204 | ||
1205 | static int f2fs_read_data_pages(struct file *file, | |
1206 | struct address_space *mapping, | |
1207 | struct list_head *pages, unsigned nr_pages) | |
1208 | { | |
9ffe0fb5 | 1209 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1210 | struct page *page = list_entry(pages->prev, struct page, lru); |
1211 | ||
1212 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1213 | |
1214 | /* If the file has inline data, skip readpages */ | |
1215 | if (f2fs_has_inline_data(inode)) | |
1216 | return 0; | |
1217 | ||
f1e88660 | 1218 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1219 | } |
1220 | ||
05ca3632 | 1221 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1222 | { |
05ca3632 | 1223 | struct page *page = fio->page; |
eb47b800 | 1224 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1225 | struct dnode_of_data dn; |
1226 | int err = 0; | |
1227 | ||
1228 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1229 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1230 | if (err) |
1231 | return err; | |
1232 | ||
c1286ff4 | 1233 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1234 | |
1235 | /* This page is already truncated */ | |
c1286ff4 | 1236 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1237 | ClearPageUptodate(page); |
eb47b800 | 1238 | goto out_writepage; |
2bca1e23 | 1239 | } |
eb47b800 | 1240 | |
4375a336 | 1241 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
c1286ff4 | 1242 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1243 | |
1244 | /* wait for GCed encrypted page writeback */ | |
1245 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
c1286ff4 JK |
1246 | fio->old_blkaddr); |
1247 | retry_encrypt: | |
1248 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1249 | gfp_flags); | |
4375a336 JK |
1250 | if (IS_ERR(fio->encrypted_page)) { |
1251 | err = PTR_ERR(fio->encrypted_page); | |
c1286ff4 JK |
1252 | if (err == -ENOMEM) { |
1253 | /* flush pending ios and wait for a while */ | |
1254 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1255 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1256 | gfp_flags |= __GFP_NOFAIL; | |
1257 | err = 0; | |
1258 | goto retry_encrypt; | |
1259 | } | |
4375a336 JK |
1260 | goto out_writepage; |
1261 | } | |
1262 | } | |
1263 | ||
eb47b800 JK |
1264 | set_page_writeback(page); |
1265 | ||
1266 | /* | |
1267 | * If current allocation needs SSR, | |
1268 | * it had better in-place writes for updated data. | |
1269 | */ | |
c1286ff4 | 1270 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1271 | !is_cold_data(page) && |
c1286ff4 | 1272 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1273 | need_inplace_update(inode))) { |
05ca3632 | 1274 | rewrite_data_page(fio); |
c1286ff4 | 1275 | set_inode_flag(inode, FI_UPDATE_WRITE); |
8ce67cb0 | 1276 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1277 | } else { |
05ca3632 | 1278 | write_data_page(&dn, fio); |
8ce67cb0 | 1279 | trace_f2fs_do_write_data_page(page, OPU); |
c1286ff4 | 1280 | set_inode_flag(inode, FI_APPEND_WRITE); |
3c6c2beb | 1281 | if (page->index == 0) |
c1286ff4 | 1282 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
eb47b800 JK |
1283 | } |
1284 | out_writepage: | |
1285 | f2fs_put_dnode(&dn); | |
1286 | return err; | |
1287 | } | |
1288 | ||
1289 | static int f2fs_write_data_page(struct page *page, | |
1290 | struct writeback_control *wbc) | |
1291 | { | |
1292 | struct inode *inode = page->mapping->host; | |
4081363f | 1293 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1294 | loff_t i_size = i_size_read(inode); |
1295 | const pgoff_t end_index = ((unsigned long long) i_size) | |
c1286ff4 JK |
1296 | >> PAGE_SHIFT; |
1297 | loff_t psize = (page->index + 1) << PAGE_SHIFT; | |
9ffe0fb5 | 1298 | unsigned offset = 0; |
39936837 | 1299 | bool need_balance_fs = false; |
eb47b800 | 1300 | int err = 0; |
458e6197 | 1301 | struct f2fs_io_info fio = { |
05ca3632 | 1302 | .sbi = sbi, |
458e6197 | 1303 | .type = DATA, |
dc45fd9e JK |
1304 | .op = REQ_OP_WRITE, |
1305 | .op_flags = wbc_to_write_flags(wbc), | |
05ca3632 | 1306 | .page = page, |
4375a336 | 1307 | .encrypted_page = NULL, |
458e6197 | 1308 | }; |
eb47b800 | 1309 | |
ecda0de3 CY |
1310 | trace_f2fs_writepage(page, DATA); |
1311 | ||
eb47b800 | 1312 | if (page->index < end_index) |
39936837 | 1313 | goto write; |
eb47b800 JK |
1314 | |
1315 | /* | |
1316 | * If the offset is out-of-range of file size, | |
1317 | * this page does not have to be written to disk. | |
1318 | */ | |
c1286ff4 | 1319 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1320 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1321 | goto out; |
eb47b800 | 1322 | |
c1286ff4 | 1323 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1324 | write: |
caf0047e | 1325 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1326 | goto redirty_out; |
1e84371f JK |
1327 | if (f2fs_is_drop_cache(inode)) |
1328 | goto out; | |
c1286ff4 JK |
1329 | /* we should not write 0'th page having journal header */ |
1330 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1331 | (!wbc->for_reclaim && | |
1332 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1333 | goto redirty_out; |
eb47b800 | 1334 | |
c1286ff4 JK |
1335 | /* we should bypass data pages to proceed the kworkder jobs */ |
1336 | if (unlikely(f2fs_cp_error(sbi))) { | |
1337 | mapping_set_error(page->mapping, -EIO); | |
1338 | goto out; | |
1339 | } | |
1340 | ||
39936837 | 1341 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1342 | if (S_ISDIR(inode->i_mode)) { |
05ca3632 | 1343 | err = do_write_data_page(&fio); |
8618b881 JK |
1344 | goto done; |
1345 | } | |
9ffe0fb5 | 1346 | |
8618b881 | 1347 | if (!wbc->for_reclaim) |
39936837 | 1348 | need_balance_fs = true; |
c1286ff4 | 1349 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1350 | goto redirty_out; |
eb47b800 | 1351 | |
b3d208f9 | 1352 | err = -EAGAIN; |
8618b881 | 1353 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1354 | if (f2fs_has_inline_data(inode)) |
1355 | err = f2fs_write_inline_data(inode, page); | |
1356 | if (err == -EAGAIN) | |
05ca3632 | 1357 | err = do_write_data_page(&fio); |
c1286ff4 JK |
1358 | if (F2FS_I(inode)->last_disk_size < psize) |
1359 | F2FS_I(inode)->last_disk_size = psize; | |
8618b881 JK |
1360 | f2fs_unlock_op(sbi); |
1361 | done: | |
1362 | if (err && err != -ENOENT) | |
1363 | goto redirty_out; | |
eb47b800 | 1364 | |
39936837 | 1365 | out: |
a7ffdbe2 | 1366 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1367 | if (err) |
1368 | ClearPageUptodate(page); | |
c1286ff4 JK |
1369 | |
1370 | if (wbc->for_reclaim) { | |
1371 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1372 | remove_dirty_inode(inode); | |
1373 | } | |
1374 | ||
eb47b800 | 1375 | unlock_page(page); |
c1286ff4 JK |
1376 | f2fs_balance_fs(sbi, need_balance_fs); |
1377 | ||
1378 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1379 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
c1286ff4 | 1380 | |
eb47b800 JK |
1381 | return 0; |
1382 | ||
eb47b800 | 1383 | redirty_out: |
76f60268 | 1384 | redirty_page_for_writepage(wbc, page); |
9a82dd23 CY |
1385 | if (!err) |
1386 | return AOP_WRITEPAGE_ACTIVATE; | |
c1286ff4 JK |
1387 | unlock_page(page); |
1388 | return err; | |
fa9150a8 NJ |
1389 | } |
1390 | ||
8f46dcae CY |
1391 | /* |
1392 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1393 | * The major change is making write step of cold data page separately from | |
1394 | * warm/hot data page. | |
1395 | */ | |
1396 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
c1286ff4 | 1397 | struct writeback_control *wbc) |
8f46dcae CY |
1398 | { |
1399 | int ret = 0; | |
1400 | int done = 0; | |
1401 | struct pagevec pvec; | |
1402 | int nr_pages; | |
1403 | pgoff_t uninitialized_var(writeback_index); | |
1404 | pgoff_t index; | |
1405 | pgoff_t end; /* Inclusive */ | |
1406 | pgoff_t done_index; | |
1407 | int cycled; | |
1408 | int range_whole = 0; | |
1409 | int tag; | |
c1286ff4 | 1410 | int nwritten = 0; |
8f46dcae CY |
1411 | |
1412 | pagevec_init(&pvec, 0); | |
c1286ff4 | 1413 | |
8f46dcae CY |
1414 | if (wbc->range_cyclic) { |
1415 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1416 | index = writeback_index; | |
1417 | if (index == 0) | |
1418 | cycled = 1; | |
1419 | else | |
1420 | cycled = 0; | |
1421 | end = -1; | |
1422 | } else { | |
c1286ff4 JK |
1423 | index = wbc->range_start >> PAGE_SHIFT; |
1424 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1425 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1426 | range_whole = 1; | |
1427 | cycled = 1; /* ignore range_cyclic tests */ | |
1428 | } | |
1429 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1430 | tag = PAGECACHE_TAG_TOWRITE; | |
1431 | else | |
1432 | tag = PAGECACHE_TAG_DIRTY; | |
1433 | retry: | |
1434 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1435 | tag_pages_for_writeback(mapping, index, end); | |
1436 | done_index = index; | |
1437 | while (!done && (index <= end)) { | |
1438 | int i; | |
1439 | ||
1440 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1441 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1442 | if (nr_pages == 0) | |
1443 | break; | |
1444 | ||
1445 | for (i = 0; i < nr_pages; i++) { | |
1446 | struct page *page = pvec.pages[i]; | |
1447 | ||
1448 | if (page->index > end) { | |
1449 | done = 1; | |
1450 | break; | |
1451 | } | |
1452 | ||
1453 | done_index = page->index; | |
1454 | ||
1455 | lock_page(page); | |
1456 | ||
1457 | if (unlikely(page->mapping != mapping)) { | |
1458 | continue_unlock: | |
1459 | unlock_page(page); | |
1460 | continue; | |
1461 | } | |
1462 | ||
1463 | if (!PageDirty(page)) { | |
1464 | /* someone wrote it for us */ | |
1465 | goto continue_unlock; | |
1466 | } | |
1467 | ||
8f46dcae CY |
1468 | if (PageWriteback(page)) { |
1469 | if (wbc->sync_mode != WB_SYNC_NONE) | |
c1286ff4 JK |
1470 | f2fs_wait_on_page_writeback(page, |
1471 | DATA, true); | |
8f46dcae CY |
1472 | else |
1473 | goto continue_unlock; | |
1474 | } | |
1475 | ||
1476 | BUG_ON(PageWriteback(page)); | |
1477 | if (!clear_page_dirty_for_io(page)) | |
1478 | goto continue_unlock; | |
1479 | ||
c1286ff4 | 1480 | ret = mapping->a_ops->writepage(page, wbc); |
8f46dcae | 1481 | if (unlikely(ret)) { |
9a82dd23 CY |
1482 | /* |
1483 | * keep nr_to_write, since vfs uses this to | |
1484 | * get # of written pages. | |
1485 | */ | |
1486 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1487 | unlock_page(page); | |
1488 | ret = 0; | |
1489 | continue; | |
1490 | } | |
c1286ff4 JK |
1491 | done_index = page->index + 1; |
1492 | done = 1; | |
1493 | break; | |
1494 | } else { | |
1495 | nwritten++; | |
8f46dcae CY |
1496 | } |
1497 | ||
1498 | if (--wbc->nr_to_write <= 0 && | |
1499 | wbc->sync_mode == WB_SYNC_NONE) { | |
1500 | done = 1; | |
1501 | break; | |
1502 | } | |
1503 | } | |
1504 | pagevec_release(&pvec); | |
1505 | cond_resched(); | |
1506 | } | |
1507 | ||
8f46dcae CY |
1508 | if (!cycled && !done) { |
1509 | cycled = 1; | |
1510 | index = 0; | |
1511 | end = writeback_index - 1; | |
1512 | goto retry; | |
1513 | } | |
1514 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1515 | mapping->writeback_index = done_index; | |
1516 | ||
c1286ff4 JK |
1517 | if (nwritten) |
1518 | f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping), mapping->host, | |
1519 | NULL, 0, DATA, WRITE); | |
1520 | ||
8f46dcae CY |
1521 | return ret; |
1522 | } | |
1523 | ||
25ca923b | 1524 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1525 | struct writeback_control *wbc) |
1526 | { | |
1527 | struct inode *inode = mapping->host; | |
4081363f | 1528 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
c1286ff4 | 1529 | struct blk_plug plug; |
eb47b800 | 1530 | int ret; |
e5748434 | 1531 | |
cfb185a1 | 1532 | /* deal with chardevs and other special file */ |
1533 | if (!mapping->a_ops->writepage) | |
1534 | return 0; | |
1535 | ||
6a290544 CY |
1536 | /* skip writing if there is no dirty page in this inode */ |
1537 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1538 | return 0; | |
1539 | ||
a1257023 JK |
1540 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1541 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1542 | available_free_memory(sbi, DIRTY_DENTS)) | |
1543 | goto skip_write; | |
1544 | ||
c1286ff4 JK |
1545 | /* skip writing during file defragment */ |
1546 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) | |
1547 | goto skip_write; | |
1548 | ||
d5669f7b JK |
1549 | /* during POR, we don't need to trigger writepage at all. */ |
1550 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1551 | goto skip_write; | |
1552 | ||
c1286ff4 | 1553 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
458e6197 | 1554 | |
c1286ff4 JK |
1555 | blk_start_plug(&plug); |
1556 | ret = f2fs_write_cache_pages(mapping, wbc); | |
1557 | blk_finish_plug(&plug); | |
1558 | /* | |
1559 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1560 | * to detect pending bios. | |
1561 | */ | |
eb47b800 | 1562 | |
c1286ff4 | 1563 | remove_dirty_inode(inode); |
eb47b800 | 1564 | return ret; |
d3baf95d JK |
1565 | |
1566 | skip_write: | |
a7ffdbe2 | 1567 | wbc->pages_skipped += get_dirty_pages(inode); |
c1286ff4 | 1568 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1569 | return 0; |
eb47b800 JK |
1570 | } |
1571 | ||
3aab8f82 CY |
1572 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1573 | { | |
1574 | struct inode *inode = mapping->host; | |
c1286ff4 JK |
1575 | loff_t i_size = i_size_read(inode); |
1576 | ||
1577 | if (to > i_size) { | |
1578 | truncate_pagecache(inode, i_size); | |
1579 | truncate_blocks(inode, i_size, true); | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | static int prepare_write_begin(struct f2fs_sb_info *sbi, | |
1584 | struct page *page, loff_t pos, unsigned len, | |
1585 | block_t *blk_addr, bool *node_changed) | |
1586 | { | |
1587 | struct inode *inode = page->mapping->host; | |
1588 | pgoff_t index = page->index; | |
1589 | struct dnode_of_data dn; | |
1590 | struct page *ipage; | |
1591 | bool locked = false; | |
1592 | struct extent_info ei; | |
1593 | int err = 0; | |
1594 | ||
1595 | /* | |
1596 | * we already allocated all the blocks, so we don't need to get | |
1597 | * the block addresses when there is no need to fill the page. | |
1598 | */ | |
1599 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE) | |
1600 | return 0; | |
3aab8f82 | 1601 | |
c1286ff4 JK |
1602 | if (f2fs_has_inline_data(inode) || |
1603 | (pos & PAGE_MASK) >= i_size_read(inode)) { | |
1604 | f2fs_lock_op(sbi); | |
1605 | locked = true; | |
3aab8f82 | 1606 | } |
c1286ff4 JK |
1607 | restart: |
1608 | /* check inline_data */ | |
1609 | ipage = get_node_page(sbi, inode->i_ino); | |
1610 | if (IS_ERR(ipage)) { | |
1611 | err = PTR_ERR(ipage); | |
1612 | goto unlock_out; | |
1613 | } | |
1614 | ||
1615 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1616 | ||
1617 | if (f2fs_has_inline_data(inode)) { | |
1618 | if (pos + len <= MAX_INLINE_DATA) { | |
1619 | read_inline_data(page, ipage); | |
1620 | set_inode_flag(inode, FI_DATA_EXIST); | |
1621 | if (inode->i_nlink) | |
1622 | set_inline_node(ipage); | |
1623 | } else { | |
1624 | err = f2fs_convert_inline_page(&dn, page); | |
1625 | if (err) | |
1626 | goto out; | |
1627 | if (dn.data_blkaddr == NULL_ADDR) | |
1628 | err = f2fs_get_block(&dn, index); | |
1629 | } | |
1630 | } else if (locked) { | |
1631 | err = f2fs_get_block(&dn, index); | |
1632 | } else { | |
1633 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1634 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1635 | } else { | |
1636 | /* hole case */ | |
1637 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
1638 | if (err || dn.data_blkaddr == NULL_ADDR) { | |
1639 | f2fs_put_dnode(&dn); | |
1640 | f2fs_lock_op(sbi); | |
1641 | locked = true; | |
1642 | goto restart; | |
1643 | } | |
1644 | } | |
1645 | } | |
1646 | ||
1647 | /* convert_inline_page can make node_changed */ | |
1648 | *blk_addr = dn.data_blkaddr; | |
1649 | *node_changed = dn.node_changed; | |
1650 | out: | |
1651 | f2fs_put_dnode(&dn); | |
1652 | unlock_out: | |
1653 | if (locked) | |
1654 | f2fs_unlock_op(sbi); | |
1655 | return err; | |
3aab8f82 CY |
1656 | } |
1657 | ||
eb47b800 JK |
1658 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1659 | loff_t pos, unsigned len, unsigned flags, | |
1660 | struct page **pagep, void **fsdata) | |
1661 | { | |
1662 | struct inode *inode = mapping->host; | |
4081363f | 1663 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1664 | struct page *page = NULL; |
c1286ff4 JK |
1665 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
1666 | bool need_balance = false; | |
1667 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1668 | int err = 0; |
1669 | ||
d854b688 MS |
1670 | if (trace_android_fs_datawrite_start_enabled()) { |
1671 | char *path, pathbuf[MAX_TRACE_PATHBUF_LEN]; | |
1672 | ||
1673 | path = android_fstrace_get_pathname(pathbuf, | |
1674 | MAX_TRACE_PATHBUF_LEN, | |
1675 | inode); | |
1676 | trace_android_fs_datawrite_start(inode, pos, len, | |
1677 | current->pid, path, | |
1678 | current->comm); | |
1679 | } | |
62aed044 CY |
1680 | trace_f2fs_write_begin(inode, pos, len, flags); |
1681 | ||
5f727395 JK |
1682 | /* |
1683 | * We should check this at this moment to avoid deadlock on inode page | |
1684 | * and #0 page. The locking rule for inline_data conversion should be: | |
1685 | * lock_page(page #0) -> lock_page(inode_page) | |
1686 | */ | |
1687 | if (index != 0) { | |
1688 | err = f2fs_convert_inline_inode(inode); | |
1689 | if (err) | |
1690 | goto fail; | |
1691 | } | |
afcb7ca0 | 1692 | repeat: |
eb47b800 | 1693 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1694 | if (!page) { |
1695 | err = -ENOMEM; | |
1696 | goto fail; | |
1697 | } | |
d5f66990 | 1698 | |
eb47b800 JK |
1699 | *pagep = page; |
1700 | ||
c1286ff4 JK |
1701 | err = prepare_write_begin(sbi, page, pos, len, |
1702 | &blkaddr, &need_balance); | |
1703 | if (err) | |
1704 | goto fail; | |
b3d208f9 | 1705 | |
c1286ff4 JK |
1706 | if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) { |
1707 | unlock_page(page); | |
1708 | f2fs_balance_fs(sbi, true); | |
1709 | lock_page(page); | |
1710 | if (page->mapping != mapping) { | |
1711 | /* The page got truncated from under us */ | |
1712 | f2fs_put_page(page, 1); | |
1713 | goto repeat; | |
b3d208f9 | 1714 | } |
b600965c | 1715 | } |
759af1c9 | 1716 | |
c1286ff4 | 1717 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1718 | |
08b39fbd CY |
1719 | /* wait for GCed encrypted page writeback */ |
1720 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
c1286ff4 | 1721 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1722 | |
c1286ff4 JK |
1723 | if (len == PAGE_SIZE || PageUptodate(page)) |
1724 | return 0; | |
eb47b800 | 1725 | |
c1286ff4 JK |
1726 | if (blkaddr == NEW_ADDR) { |
1727 | zero_user_segment(page, 0, PAGE_SIZE); | |
1728 | SetPageUptodate(page); | |
eb47b800 | 1729 | } else { |
c1286ff4 JK |
1730 | struct bio *bio; |
1731 | ||
1732 | bio = f2fs_grab_bio(inode, blkaddr, 1); | |
1733 | if (IS_ERR(bio)) { | |
1734 | err = PTR_ERR(bio); | |
9234f319 | 1735 | goto fail; |
c1286ff4 | 1736 | } |
dc45fd9e | 1737 | bio->bi_rw = READ_SYNC; |
c1286ff4 JK |
1738 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
1739 | bio_put(bio); | |
1740 | err = -EFAULT; | |
3aab8f82 | 1741 | goto fail; |
eb47b800 | 1742 | } |
c1286ff4 | 1743 | |
dc45fd9e | 1744 | __submit_bio(sbi, bio, DATA); |
c1286ff4 JK |
1745 | |
1746 | lock_page(page); | |
6bacf52f | 1747 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1748 | f2fs_put_page(page, 1); |
1749 | goto repeat; | |
eb47b800 | 1750 | } |
c1286ff4 JK |
1751 | if (unlikely(!PageUptodate(page))) { |
1752 | err = -EIO; | |
1753 | goto fail; | |
4375a336 | 1754 | } |
eb47b800 | 1755 | } |
eb47b800 | 1756 | return 0; |
9ba69cf9 | 1757 | |
3aab8f82 | 1758 | fail: |
86531d6b | 1759 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1760 | f2fs_write_failed(mapping, pos + len); |
1761 | return err; | |
eb47b800 JK |
1762 | } |
1763 | ||
a1dd3c13 JK |
1764 | static int f2fs_write_end(struct file *file, |
1765 | struct address_space *mapping, | |
1766 | loff_t pos, unsigned len, unsigned copied, | |
1767 | struct page *page, void *fsdata) | |
1768 | { | |
1769 | struct inode *inode = page->mapping->host; | |
1770 | ||
32cbbe59 | 1771 | trace_android_fs_datawrite_end(inode, pos, len); |
dfb2bf38 CY |
1772 | trace_f2fs_write_end(inode, pos, len, copied); |
1773 | ||
c1286ff4 JK |
1774 | /* |
1775 | * This should be come from len == PAGE_SIZE, and we expect copied | |
1776 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
1777 | * let generic_perform_write() try to copy data again through copied=0. | |
1778 | */ | |
1779 | if (!PageUptodate(page)) { | |
1780 | if (unlikely(copied != PAGE_SIZE)) | |
1781 | copied = 0; | |
1782 | else | |
1783 | SetPageUptodate(page); | |
a1dd3c13 | 1784 | } |
c1286ff4 JK |
1785 | if (!copied) |
1786 | goto unlock_out; | |
1787 | ||
1788 | set_page_dirty(page); | |
a1dd3c13 | 1789 | |
c1286ff4 JK |
1790 | if (pos + copied > i_size_read(inode)) |
1791 | f2fs_i_size_write(inode, pos + copied); | |
1792 | unlock_out: | |
75c3c8bc | 1793 | f2fs_put_page(page, 1); |
c1286ff4 | 1794 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1795 | return copied; |
1796 | } | |
1797 | ||
6f673763 OS |
1798 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1799 | loff_t offset) | |
944fcfc1 JK |
1800 | { |
1801 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1802 | |
944fcfc1 JK |
1803 | if (offset & blocksize_mask) |
1804 | return -EINVAL; | |
1805 | ||
5b46f25d AV |
1806 | if (iov_iter_alignment(iter) & blocksize_mask) |
1807 | return -EINVAL; | |
1808 | ||
944fcfc1 JK |
1809 | return 0; |
1810 | } | |
1811 | ||
22c6186e | 1812 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
c1286ff4 | 1813 | loff_t offset) |
eb47b800 | 1814 | { |
c1286ff4 | 1815 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1816 | struct inode *inode = mapping->host; |
1817 | size_t count = iov_iter_count(iter); | |
c1286ff4 | 1818 | int rw = iov_iter_rw(iter); |
3aab8f82 | 1819 | int err; |
944fcfc1 | 1820 | |
c15e8599 CY |
1821 | err = check_direct_IO(inode, iter, offset); |
1822 | if (err) | |
1823 | return err; | |
944fcfc1 | 1824 | |
8b2c7581 | 1825 | if (__force_buffered_io(inode, rw)) |
07f01079 | 1826 | return 0; |
70407fad | 1827 | |
32cbbe59 | 1828 | if (trace_android_fs_dataread_start_enabled() && |
d854b688 MS |
1829 | (iov_iter_rw(iter) == READ)) { |
1830 | char *path, pathbuf[MAX_TRACE_PATHBUF_LEN]; | |
1831 | ||
1832 | path = android_fstrace_get_pathname(pathbuf, | |
1833 | MAX_TRACE_PATHBUF_LEN, | |
1834 | inode); | |
32cbbe59 | 1835 | trace_android_fs_dataread_start(inode, offset, |
d854b688 | 1836 | count, current->pid, path, |
32cbbe59 | 1837 | current->comm); |
d854b688 | 1838 | } |
32cbbe59 | 1839 | if (trace_android_fs_datawrite_start_enabled() && |
d854b688 MS |
1840 | (iov_iter_rw(iter) == WRITE)) { |
1841 | char *path, pathbuf[MAX_TRACE_PATHBUF_LEN]; | |
32cbbe59 | 1842 | |
d854b688 MS |
1843 | path = android_fstrace_get_pathname(pathbuf, |
1844 | MAX_TRACE_PATHBUF_LEN, | |
1845 | inode); | |
1846 | trace_android_fs_datawrite_start(inode, offset, count, | |
1847 | current->pid, path, | |
1848 | current->comm); | |
1849 | } | |
c1286ff4 | 1850 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
59b802e5 | 1851 | |
c1286ff4 | 1852 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
e2b4e2bc | 1853 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
c1286ff4 JK |
1854 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
1855 | ||
1856 | if (rw == WRITE) { | |
1857 | if (err > 0) | |
1858 | set_inode_flag(inode, FI_UPDATE_WRITE); | |
1859 | else if (err < 0) | |
1860 | f2fs_write_failed(mapping, offset + count); | |
1861 | } | |
70407fad | 1862 | |
32cbbe59 MS |
1863 | if (trace_android_fs_dataread_start_enabled() && |
1864 | (iov_iter_rw(iter) == READ)) | |
1865 | trace_android_fs_dataread_end(inode, offset, count); | |
1866 | if (trace_android_fs_datawrite_start_enabled() && | |
1867 | (iov_iter_rw(iter) == WRITE)) | |
1868 | trace_android_fs_datawrite_end(inode, offset, count); | |
1869 | ||
c1286ff4 | 1870 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 1871 | |
3aab8f82 | 1872 | return err; |
eb47b800 JK |
1873 | } |
1874 | ||
487261f3 CY |
1875 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1876 | unsigned int length) | |
eb47b800 JK |
1877 | { |
1878 | struct inode *inode = page->mapping->host; | |
487261f3 | 1879 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1880 | |
487261f3 | 1881 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
c1286ff4 | 1882 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1883 | return; |
1884 | ||
487261f3 | 1885 | if (PageDirty(page)) { |
75bb19d8 | 1886 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 1887 | dec_page_count(sbi, F2FS_DIRTY_META); |
75bb19d8 | 1888 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 1889 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
75bb19d8 | 1890 | } else { |
487261f3 | 1891 | inode_dec_dirty_pages(inode); |
75bb19d8 CY |
1892 | remove_dirty_inode(inode); |
1893 | } | |
487261f3 | 1894 | } |
decd36b6 CY |
1895 | |
1896 | /* This is atomic written page, keep Private */ | |
1897 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1898 | return; | |
1899 | ||
c1286ff4 | 1900 | set_page_private(page, 0); |
eb47b800 JK |
1901 | ClearPagePrivate(page); |
1902 | } | |
1903 | ||
487261f3 | 1904 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1905 | { |
f68daeeb JK |
1906 | /* If this is dirty page, keep PagePrivate */ |
1907 | if (PageDirty(page)) | |
1908 | return 0; | |
1909 | ||
decd36b6 CY |
1910 | /* This is atomic written page, keep Private */ |
1911 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1912 | return 0; | |
1913 | ||
c1286ff4 | 1914 | set_page_private(page, 0); |
eb47b800 | 1915 | ClearPagePrivate(page); |
c3850aa1 | 1916 | return 1; |
eb47b800 JK |
1917 | } |
1918 | ||
c1286ff4 JK |
1919 | /* |
1920 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
1921 | * in very high speed storages. (e.g., pmem) | |
1922 | */ | |
1923 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
1924 | { | |
1925 | struct address_space *mapping = page->mapping; | |
1926 | struct mem_cgroup *memcg; | |
1927 | unsigned long flags; | |
1928 | ||
1929 | if (unlikely(!mapping)) | |
1930 | return; | |
1931 | ||
1932 | spin_lock(&mapping->private_lock); | |
1933 | memcg = mem_cgroup_begin_page_stat(page); | |
1934 | SetPageDirty(page); | |
1935 | spin_unlock(&mapping->private_lock); | |
1936 | ||
1937 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
1938 | WARN_ON_ONCE(!PageUptodate(page)); | |
1939 | account_page_dirtied(page, mapping, memcg); | |
1940 | radix_tree_tag_set(&mapping->page_tree, | |
1941 | page_index(page), PAGECACHE_TAG_DIRTY); | |
1942 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
1943 | ||
1944 | mem_cgroup_end_page_stat(memcg); | |
1945 | ||
1946 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
1947 | return; | |
1948 | } | |
1949 | ||
eb47b800 JK |
1950 | static int f2fs_set_data_page_dirty(struct page *page) |
1951 | { | |
1952 | struct address_space *mapping = page->mapping; | |
1953 | struct inode *inode = mapping->host; | |
1954 | ||
26c6b887 JK |
1955 | trace_f2fs_set_page_dirty(page, DATA); |
1956 | ||
c1286ff4 JK |
1957 | if (!PageUptodate(page)) |
1958 | SetPageUptodate(page); | |
34ba94ba | 1959 | |
1e84371f | 1960 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1961 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1962 | register_inmem_page(inode, page); | |
1963 | return 1; | |
1964 | } | |
1965 | /* | |
1966 | * Previously, this page has been registered, we just | |
1967 | * return here. | |
1968 | */ | |
1969 | return 0; | |
34ba94ba JK |
1970 | } |
1971 | ||
eb47b800 | 1972 | if (!PageDirty(page)) { |
c1286ff4 | 1973 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 1974 | update_dirty_page(inode, page); |
eb47b800 JK |
1975 | return 1; |
1976 | } | |
1977 | return 0; | |
1978 | } | |
1979 | ||
c01e54b7 JK |
1980 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1981 | { | |
454ae7e5 CY |
1982 | struct inode *inode = mapping->host; |
1983 | ||
1d373a0e JK |
1984 | if (f2fs_has_inline_data(inode)) |
1985 | return 0; | |
1986 | ||
1987 | /* make sure allocating whole blocks */ | |
1988 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1989 | filemap_write_and_wait(mapping); | |
1990 | ||
e2b4e2bc | 1991 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1992 | } |
1993 | ||
c1286ff4 JK |
1994 | #ifdef CONFIG_MIGRATION |
1995 | #include <linux/migrate.h> | |
1996 | ||
1997 | int f2fs_migrate_page(struct address_space *mapping, | |
1998 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
1999 | { | |
2000 | int rc, extra_count; | |
2001 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
2002 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
2003 | ||
2004 | BUG_ON(PageWriteback(page)); | |
2005 | ||
2006 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
2007 | if (atomic_written && !mutex_trylock(&fi->inmem_lock)) | |
2008 | return -EAGAIN; | |
2009 | ||
2010 | /* | |
2011 | * A reference is expected if PagePrivate set when move mapping, | |
2012 | * however F2FS breaks this for maintaining dirty page counts when | |
2013 | * truncating pages. So here adjusting the 'extra_count' make it work. | |
2014 | */ | |
2015 | extra_count = (atomic_written ? 1 : 0) - page_has_private(page); | |
2016 | rc = migrate_page_move_mapping(mapping, newpage, | |
2017 | page, NULL, mode, extra_count); | |
2018 | if (rc != MIGRATEPAGE_SUCCESS) { | |
2019 | if (atomic_written) | |
2020 | mutex_unlock(&fi->inmem_lock); | |
2021 | return rc; | |
2022 | } | |
2023 | ||
2024 | if (atomic_written) { | |
2025 | struct inmem_pages *cur; | |
2026 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
2027 | if (cur->page == page) { | |
2028 | cur->page = newpage; | |
2029 | break; | |
2030 | } | |
2031 | mutex_unlock(&fi->inmem_lock); | |
2032 | put_page(page); | |
2033 | get_page(newpage); | |
2034 | } | |
2035 | ||
2036 | if (PagePrivate(page)) | |
2037 | SetPagePrivate(newpage); | |
2038 | set_page_private(newpage, page_private(page)); | |
2039 | ||
2040 | migrate_page_copy(newpage, page); | |
2041 | ||
2042 | return MIGRATEPAGE_SUCCESS; | |
2043 | } | |
2044 | #endif | |
2045 | ||
eb47b800 JK |
2046 | const struct address_space_operations f2fs_dblock_aops = { |
2047 | .readpage = f2fs_read_data_page, | |
2048 | .readpages = f2fs_read_data_pages, | |
2049 | .writepage = f2fs_write_data_page, | |
2050 | .writepages = f2fs_write_data_pages, | |
2051 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 2052 | .write_end = f2fs_write_end, |
eb47b800 | 2053 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
2054 | .invalidatepage = f2fs_invalidate_page, |
2055 | .releasepage = f2fs_release_page, | |
eb47b800 | 2056 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 2057 | .bmap = f2fs_bmap, |
c1286ff4 JK |
2058 | #ifdef CONFIG_MIGRATION |
2059 | .migratepage = f2fs_migrate_page, | |
2060 | #endif | |
eb47b800 | 2061 | }; |