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Commit | Line | Data |
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0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
fe76b796 JK |
22 | #include <linux/mm.h> |
23 | #include <linux/memcontrol.h> | |
f1e88660 | 24 | #include <linux/cleancache.h> |
eb47b800 JK |
25 | |
26 | #include "f2fs.h" | |
27 | #include "node.h" | |
28 | #include "segment.h" | |
db9f7c1a | 29 | #include "trace.h" |
848753aa | 30 | #include <trace/events/f2fs.h> |
eb47b800 | 31 | |
4246a0b6 | 32 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 33 | { |
f568849e LT |
34 | struct bio_vec *bvec; |
35 | int i; | |
93dfe2ac | 36 | |
8b038c70 | 37 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
1ecc0c5c | 38 | if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) |
8b038c70 CY |
39 | bio->bi_error = -EIO; |
40 | #endif | |
41 | ||
4375a336 | 42 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 43 | if (bio->bi_error) { |
0b81d077 | 44 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 45 | } else { |
0b81d077 | 46 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
47 | return; |
48 | } | |
49 | } | |
50 | ||
12377024 CY |
51 | bio_for_each_segment_all(bvec, bio, i) { |
52 | struct page *page = bvec->bv_page; | |
f1e88660 | 53 | |
4246a0b6 | 54 | if (!bio->bi_error) { |
237c0790 JK |
55 | if (!PageUptodate(page)) |
56 | SetPageUptodate(page); | |
f1e88660 JK |
57 | } else { |
58 | ClearPageUptodate(page); | |
59 | SetPageError(page); | |
60 | } | |
61 | unlock_page(page); | |
62 | } | |
f1e88660 JK |
63 | bio_put(bio); |
64 | } | |
65 | ||
4246a0b6 | 66 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 67 | { |
1b1f559f | 68 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
69 | struct bio_vec *bvec; |
70 | int i; | |
93dfe2ac | 71 | |
f568849e | 72 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
73 | struct page *page = bvec->bv_page; |
74 | ||
0b81d077 | 75 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 76 | |
4246a0b6 | 77 | if (unlikely(bio->bi_error)) { |
5114a97a | 78 | mapping_set_error(page->mapping, -EIO); |
38f91ca8 | 79 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac JK |
80 | } |
81 | end_page_writeback(page); | |
f568849e | 82 | } |
f5730184 JK |
83 | if (atomic_dec_and_test(&sbi->nr_wb_bios) && |
84 | wq_has_sleeper(&sbi->cp_wait)) | |
93dfe2ac JK |
85 | wake_up(&sbi->cp_wait); |
86 | ||
87 | bio_put(bio); | |
88 | } | |
89 | ||
3c62be17 JK |
90 | /* |
91 | * Return true, if pre_bio's bdev is same as its target device. | |
92 | */ | |
93 | struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, | |
94 | block_t blk_addr, struct bio *bio) | |
95 | { | |
96 | struct block_device *bdev = sbi->sb->s_bdev; | |
97 | int i; | |
98 | ||
99 | for (i = 0; i < sbi->s_ndevs; i++) { | |
100 | if (FDEV(i).start_blk <= blk_addr && | |
101 | FDEV(i).end_blk >= blk_addr) { | |
102 | blk_addr -= FDEV(i).start_blk; | |
103 | bdev = FDEV(i).bdev; | |
104 | break; | |
105 | } | |
106 | } | |
107 | if (bio) { | |
108 | bio->bi_bdev = bdev; | |
109 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); | |
110 | } | |
111 | return bdev; | |
112 | } | |
113 | ||
114 | int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) | |
115 | { | |
116 | int i; | |
117 | ||
118 | for (i = 0; i < sbi->s_ndevs; i++) | |
119 | if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) | |
120 | return i; | |
121 | return 0; | |
122 | } | |
123 | ||
124 | static bool __same_bdev(struct f2fs_sb_info *sbi, | |
125 | block_t blk_addr, struct bio *bio) | |
126 | { | |
127 | return f2fs_target_device(sbi, blk_addr, NULL) == bio->bi_bdev; | |
128 | } | |
129 | ||
940a6d34 GZ |
130 | /* |
131 | * Low-level block read/write IO operations. | |
132 | */ | |
133 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
134 | int npages, bool is_read) | |
135 | { | |
136 | struct bio *bio; | |
137 | ||
740432f8 | 138 | bio = f2fs_bio_alloc(npages); |
940a6d34 | 139 | |
3c62be17 | 140 | f2fs_target_device(sbi, blk_addr, bio); |
940a6d34 | 141 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 142 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
143 | |
144 | return bio; | |
145 | } | |
146 | ||
4fc29c1a LT |
147 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
148 | struct bio *bio, enum page_type type) | |
f5730184 | 149 | { |
4fc29c1a | 150 | if (!is_read_io(bio_op(bio))) { |
f5730184 | 151 | atomic_inc(&sbi->nr_wb_bios); |
0bfd7a09 | 152 | if (f2fs_sb_mounted_blkzoned(sbi->sb) && |
52763a4b | 153 | current->plug && (type == DATA || type == NODE)) |
19a5f5e2 JK |
154 | blk_finish_plug(current->plug); |
155 | } | |
4e49ea4a | 156 | submit_bio(bio); |
f5730184 JK |
157 | } |
158 | ||
458e6197 | 159 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 160 | { |
458e6197 | 161 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
162 | |
163 | if (!io->bio) | |
164 | return; | |
165 | ||
04d328de | 166 | if (is_read_io(fio->op)) |
2ace38e0 | 167 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 168 | else |
2ace38e0 | 169 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 170 | |
04d328de MC |
171 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
172 | ||
4fc29c1a | 173 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
174 | io->bio = NULL; |
175 | } | |
176 | ||
0c3a5797 CY |
177 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
178 | struct page *page, nid_t ino) | |
0fd785eb | 179 | { |
0fd785eb CY |
180 | struct bio_vec *bvec; |
181 | struct page *target; | |
182 | int i; | |
183 | ||
0c3a5797 | 184 | if (!io->bio) |
0fd785eb | 185 | return false; |
0c3a5797 CY |
186 | |
187 | if (!inode && !page && !ino) | |
188 | return true; | |
0fd785eb CY |
189 | |
190 | bio_for_each_segment_all(bvec, io->bio, i) { | |
191 | ||
0b81d077 | 192 | if (bvec->bv_page->mapping) |
0fd785eb | 193 | target = bvec->bv_page; |
0b81d077 JK |
194 | else |
195 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 196 | |
0c3a5797 CY |
197 | if (inode && inode == target->mapping->host) |
198 | return true; | |
199 | if (page && page == target) | |
200 | return true; | |
201 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 202 | return true; |
0fd785eb CY |
203 | } |
204 | ||
0fd785eb CY |
205 | return false; |
206 | } | |
207 | ||
0c3a5797 CY |
208 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
209 | struct page *page, nid_t ino, | |
210 | enum page_type type) | |
211 | { | |
212 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
213 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
214 | bool ret; | |
215 | ||
216 | down_read(&io->io_rwsem); | |
217 | ret = __has_merged_page(io, inode, page, ino); | |
218 | up_read(&io->io_rwsem); | |
219 | return ret; | |
220 | } | |
221 | ||
222 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
223 | struct inode *inode, struct page *page, | |
224 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
225 | { |
226 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
227 | struct f2fs_bio_info *io; | |
228 | ||
229 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
230 | ||
df0f8dc0 | 231 | down_write(&io->io_rwsem); |
458e6197 | 232 | |
0c3a5797 CY |
233 | if (!__has_merged_page(io, inode, page, ino)) |
234 | goto out; | |
235 | ||
458e6197 JK |
236 | /* change META to META_FLUSH in the checkpoint procedure */ |
237 | if (type >= META_FLUSH) { | |
238 | io->fio.type = META_FLUSH; | |
04d328de | 239 | io->fio.op = REQ_OP_WRITE; |
0f7b2abd | 240 | if (test_opt(sbi, NOBARRIER)) |
04d328de | 241 | io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO; |
0f7b2abd | 242 | else |
04d328de MC |
243 | io->fio.op_flags = WRITE_FLUSH_FUA | REQ_META | |
244 | REQ_PRIO; | |
458e6197 JK |
245 | } |
246 | __submit_merged_bio(io); | |
0c3a5797 | 247 | out: |
df0f8dc0 | 248 | up_write(&io->io_rwsem); |
93dfe2ac JK |
249 | } |
250 | ||
0c3a5797 CY |
251 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
252 | int rw) | |
253 | { | |
254 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
255 | } | |
256 | ||
257 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
258 | struct inode *inode, struct page *page, | |
259 | nid_t ino, enum page_type type, int rw) | |
260 | { | |
261 | if (has_merged_page(sbi, inode, page, ino, type)) | |
262 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
263 | } | |
264 | ||
406657dd CY |
265 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
266 | { | |
267 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
268 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
269 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
270 | } | |
271 | ||
93dfe2ac JK |
272 | /* |
273 | * Fill the locked page with data located in the block address. | |
274 | * Return unlocked page. | |
275 | */ | |
05ca3632 | 276 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 277 | { |
93dfe2ac | 278 | struct bio *bio; |
0b81d077 JK |
279 | struct page *page = fio->encrypted_page ? |
280 | fio->encrypted_page : fio->page; | |
93dfe2ac | 281 | |
2ace38e0 | 282 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 283 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
284 | |
285 | /* Allocate a new bio */ | |
04d328de | 286 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 287 | |
09cbfeaf | 288 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 289 | bio_put(bio); |
93dfe2ac JK |
290 | return -EFAULT; |
291 | } | |
04d328de | 292 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 293 | |
4fc29c1a | 294 | __submit_bio(fio->sbi, bio, fio->type); |
93dfe2ac JK |
295 | return 0; |
296 | } | |
297 | ||
05ca3632 | 298 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 299 | { |
05ca3632 | 300 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 301 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 302 | struct f2fs_bio_info *io; |
04d328de | 303 | bool is_read = is_read_io(fio->op); |
4375a336 | 304 | struct page *bio_page; |
93dfe2ac | 305 | |
940a6d34 | 306 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 307 | |
7a9d7548 CY |
308 | if (fio->old_blkaddr != NEW_ADDR) |
309 | verify_block_addr(sbi, fio->old_blkaddr); | |
310 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 311 | |
df0f8dc0 | 312 | down_write(&io->io_rwsem); |
93dfe2ac | 313 | |
7a9d7548 | 314 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
3c62be17 JK |
315 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) || |
316 | !__same_bdev(sbi, fio->new_blkaddr, io->bio))) | |
458e6197 | 317 | __submit_merged_bio(io); |
93dfe2ac JK |
318 | alloc_new: |
319 | if (io->bio == NULL) { | |
7a9d7548 | 320 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
664ba972 | 321 | BIO_MAX_PAGES, is_read); |
458e6197 | 322 | io->fio = *fio; |
93dfe2ac JK |
323 | } |
324 | ||
4375a336 JK |
325 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
326 | ||
09cbfeaf KS |
327 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
328 | PAGE_SIZE) { | |
458e6197 | 329 | __submit_merged_bio(io); |
93dfe2ac JK |
330 | goto alloc_new; |
331 | } | |
332 | ||
7a9d7548 | 333 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 334 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 335 | |
df0f8dc0 | 336 | up_write(&io->io_rwsem); |
05ca3632 | 337 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
338 | } |
339 | ||
46008c6d CY |
340 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
341 | { | |
342 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
343 | __le32 *addr_array; | |
344 | ||
345 | /* Get physical address of data block */ | |
346 | addr_array = blkaddr_in_node(rn); | |
347 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
348 | } | |
349 | ||
0a8165d7 | 350 | /* |
eb47b800 JK |
351 | * Lock ordering for the change of data block address: |
352 | * ->data_page | |
353 | * ->node_page | |
354 | * update block addresses in the node page | |
355 | */ | |
216a620a | 356 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 357 | { |
46008c6d CY |
358 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
359 | __set_data_blkaddr(dn); | |
360 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 361 | dn->node_changed = true; |
eb47b800 JK |
362 | } |
363 | ||
f28b3434 CY |
364 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
365 | { | |
366 | dn->data_blkaddr = blkaddr; | |
367 | set_data_blkaddr(dn); | |
368 | f2fs_update_extent_cache(dn); | |
369 | } | |
370 | ||
46008c6d CY |
371 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
372 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 373 | { |
4081363f | 374 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 375 | |
46008c6d CY |
376 | if (!count) |
377 | return 0; | |
378 | ||
91942321 | 379 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 380 | return -EPERM; |
46008c6d | 381 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
382 | return -ENOSPC; |
383 | ||
46008c6d CY |
384 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
385 | dn->ofs_in_node, count); | |
386 | ||
387 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
388 | ||
389 | for (; count > 0; dn->ofs_in_node++) { | |
390 | block_t blkaddr = | |
391 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
392 | if (blkaddr == NULL_ADDR) { | |
393 | dn->data_blkaddr = NEW_ADDR; | |
394 | __set_data_blkaddr(dn); | |
395 | count--; | |
396 | } | |
397 | } | |
398 | ||
399 | if (set_page_dirty(dn->node_page)) | |
400 | dn->node_changed = true; | |
eb47b800 JK |
401 | return 0; |
402 | } | |
403 | ||
46008c6d CY |
404 | /* Should keep dn->ofs_in_node unchanged */ |
405 | int reserve_new_block(struct dnode_of_data *dn) | |
406 | { | |
407 | unsigned int ofs_in_node = dn->ofs_in_node; | |
408 | int ret; | |
409 | ||
410 | ret = reserve_new_blocks(dn, 1); | |
411 | dn->ofs_in_node = ofs_in_node; | |
412 | return ret; | |
413 | } | |
414 | ||
b600965c HL |
415 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
416 | { | |
417 | bool need_put = dn->inode_page ? false : true; | |
418 | int err; | |
419 | ||
420 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
421 | if (err) | |
422 | return err; | |
a8865372 | 423 | |
b600965c HL |
424 | if (dn->data_blkaddr == NULL_ADDR) |
425 | err = reserve_new_block(dn); | |
a8865372 | 426 | if (err || need_put) |
b600965c HL |
427 | f2fs_put_dnode(dn); |
428 | return err; | |
429 | } | |
430 | ||
759af1c9 | 431 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 432 | { |
028a41e8 | 433 | struct extent_info ei; |
759af1c9 | 434 | struct inode *inode = dn->inode; |
028a41e8 | 435 | |
759af1c9 FL |
436 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
437 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
438 | return 0; | |
429511cd | 439 | } |
028a41e8 | 440 | |
759af1c9 | 441 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
442 | } |
443 | ||
a56c7c6f | 444 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 445 | int op_flags, bool for_write) |
eb47b800 | 446 | { |
eb47b800 JK |
447 | struct address_space *mapping = inode->i_mapping; |
448 | struct dnode_of_data dn; | |
449 | struct page *page; | |
cb3bc9ee | 450 | struct extent_info ei; |
eb47b800 | 451 | int err; |
cf04e8eb | 452 | struct f2fs_io_info fio = { |
05ca3632 | 453 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 454 | .type = DATA, |
04d328de MC |
455 | .op = REQ_OP_READ, |
456 | .op_flags = op_flags, | |
4375a336 | 457 | .encrypted_page = NULL, |
cf04e8eb | 458 | }; |
eb47b800 | 459 | |
4375a336 JK |
460 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
461 | return read_mapping_page(mapping, index, NULL); | |
462 | ||
a56c7c6f | 463 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
464 | if (!page) |
465 | return ERR_PTR(-ENOMEM); | |
466 | ||
cb3bc9ee CY |
467 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
468 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
469 | goto got_it; | |
470 | } | |
471 | ||
eb47b800 | 472 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 473 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
474 | if (err) |
475 | goto put_err; | |
eb47b800 JK |
476 | f2fs_put_dnode(&dn); |
477 | ||
6bacf52f | 478 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
479 | err = -ENOENT; |
480 | goto put_err; | |
650495de | 481 | } |
cb3bc9ee | 482 | got_it: |
43f3eae1 JK |
483 | if (PageUptodate(page)) { |
484 | unlock_page(page); | |
eb47b800 | 485 | return page; |
43f3eae1 | 486 | } |
eb47b800 | 487 | |
d59ff4df JK |
488 | /* |
489 | * A new dentry page is allocated but not able to be written, since its | |
490 | * new inode page couldn't be allocated due to -ENOSPC. | |
491 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
492 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
493 | */ | |
494 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 495 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
496 | if (!PageUptodate(page)) |
497 | SetPageUptodate(page); | |
43f3eae1 | 498 | unlock_page(page); |
d59ff4df JK |
499 | return page; |
500 | } | |
eb47b800 | 501 | |
7a9d7548 | 502 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
503 | fio.page = page; |
504 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 505 | if (err) |
86531d6b | 506 | goto put_err; |
43f3eae1 | 507 | return page; |
86531d6b JK |
508 | |
509 | put_err: | |
510 | f2fs_put_page(page, 1); | |
511 | return ERR_PTR(err); | |
43f3eae1 JK |
512 | } |
513 | ||
514 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
515 | { | |
516 | struct address_space *mapping = inode->i_mapping; | |
517 | struct page *page; | |
518 | ||
519 | page = find_get_page(mapping, index); | |
520 | if (page && PageUptodate(page)) | |
521 | return page; | |
522 | f2fs_put_page(page, 0); | |
523 | ||
a56c7c6f | 524 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
525 | if (IS_ERR(page)) |
526 | return page; | |
527 | ||
528 | if (PageUptodate(page)) | |
529 | return page; | |
530 | ||
531 | wait_on_page_locked(page); | |
532 | if (unlikely(!PageUptodate(page))) { | |
533 | f2fs_put_page(page, 0); | |
534 | return ERR_PTR(-EIO); | |
535 | } | |
536 | return page; | |
537 | } | |
538 | ||
539 | /* | |
540 | * If it tries to access a hole, return an error. | |
541 | * Because, the callers, functions in dir.c and GC, should be able to know | |
542 | * whether this page exists or not. | |
543 | */ | |
a56c7c6f JK |
544 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
545 | bool for_write) | |
43f3eae1 JK |
546 | { |
547 | struct address_space *mapping = inode->i_mapping; | |
548 | struct page *page; | |
549 | repeat: | |
a56c7c6f | 550 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
551 | if (IS_ERR(page)) |
552 | return page; | |
393ff91f | 553 | |
43f3eae1 | 554 | /* wait for read completion */ |
393ff91f | 555 | lock_page(page); |
6bacf52f | 556 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
557 | f2fs_put_page(page, 1); |
558 | goto repeat; | |
eb47b800 | 559 | } |
1563ac75 CY |
560 | if (unlikely(!PageUptodate(page))) { |
561 | f2fs_put_page(page, 1); | |
562 | return ERR_PTR(-EIO); | |
563 | } | |
eb47b800 JK |
564 | return page; |
565 | } | |
566 | ||
0a8165d7 | 567 | /* |
eb47b800 JK |
568 | * Caller ensures that this data page is never allocated. |
569 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 570 | * |
4f4124d0 CY |
571 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
572 | * f2fs_unlock_op(). | |
470f00e9 CY |
573 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
574 | * ipage should be released by this function. | |
eb47b800 | 575 | */ |
64aa7ed9 | 576 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 577 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 578 | { |
eb47b800 JK |
579 | struct address_space *mapping = inode->i_mapping; |
580 | struct page *page; | |
581 | struct dnode_of_data dn; | |
582 | int err; | |
7612118a | 583 | |
a56c7c6f | 584 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
585 | if (!page) { |
586 | /* | |
587 | * before exiting, we should make sure ipage will be released | |
588 | * if any error occur. | |
589 | */ | |
590 | f2fs_put_page(ipage, 1); | |
01f28610 | 591 | return ERR_PTR(-ENOMEM); |
470f00e9 | 592 | } |
eb47b800 | 593 | |
a8865372 | 594 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 595 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
596 | if (err) { |
597 | f2fs_put_page(page, 1); | |
eb47b800 | 598 | return ERR_PTR(err); |
a8865372 | 599 | } |
01f28610 JK |
600 | if (!ipage) |
601 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
602 | |
603 | if (PageUptodate(page)) | |
01f28610 | 604 | goto got_it; |
eb47b800 JK |
605 | |
606 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 607 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
608 | if (!PageUptodate(page)) |
609 | SetPageUptodate(page); | |
eb47b800 | 610 | } else { |
4375a336 | 611 | f2fs_put_page(page, 1); |
a8865372 | 612 | |
7612118a JK |
613 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
614 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
615 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 616 | if (IS_ERR(page)) |
7612118a | 617 | return page; |
eb47b800 | 618 | } |
01f28610 | 619 | got_it: |
9edcdabf | 620 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 621 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 622 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
623 | return page; |
624 | } | |
625 | ||
bfad7c2d JK |
626 | static int __allocate_data_block(struct dnode_of_data *dn) |
627 | { | |
4081363f | 628 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 629 | struct f2fs_summary sum; |
bfad7c2d | 630 | struct node_info ni; |
976e4c50 | 631 | pgoff_t fofs; |
46008c6d | 632 | blkcnt_t count = 1; |
bfad7c2d | 633 | |
91942321 | 634 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 635 | return -EPERM; |
df6136ef CY |
636 | |
637 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
638 | if (dn->data_blkaddr == NEW_ADDR) | |
639 | goto alloc; | |
640 | ||
46008c6d | 641 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
642 | return -ENOSPC; |
643 | ||
df6136ef | 644 | alloc: |
bfad7c2d JK |
645 | get_node_info(sbi, dn->nid, &ni); |
646 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
647 | ||
df6136ef | 648 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
6ae1be13 | 649 | &sum, CURSEG_WARM_DATA); |
216a620a | 650 | set_data_blkaddr(dn); |
bfad7c2d | 651 | |
976e4c50 | 652 | /* update i_size */ |
81ca7350 | 653 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 654 | dn->ofs_in_node; |
09cbfeaf | 655 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 656 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 657 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
658 | return 0; |
659 | } | |
660 | ||
c040ff9d JK |
661 | static inline bool __force_buffered_io(struct inode *inode, int rw) |
662 | { | |
663 | return ((f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) || | |
664 | (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS)) || | |
665 | F2FS_I_SB(inode)->s_ndevs); | |
666 | } | |
667 | ||
a7de6086 | 668 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 669 | { |
b439b103 | 670 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 671 | struct f2fs_map_blocks map; |
a7de6086 | 672 | int err = 0; |
59b802e5 | 673 | |
0080c507 | 674 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
675 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
676 | if (map.m_len > map.m_lblk) | |
677 | map.m_len -= map.m_lblk; | |
678 | else | |
679 | map.m_len = 0; | |
680 | ||
da85985c | 681 | map.m_next_pgofs = NULL; |
2a340760 | 682 | |
24b84912 | 683 | if (iocb->ki_flags & IOCB_DIRECT) { |
a7de6086 JK |
684 | err = f2fs_convert_inline_inode(inode); |
685 | if (err) | |
686 | return err; | |
c040ff9d JK |
687 | return f2fs_map_blocks(inode, &map, 1, |
688 | __force_buffered_io(inode, WRITE) ? | |
689 | F2FS_GET_BLOCK_PRE_AIO : | |
690 | F2FS_GET_BLOCK_PRE_DIO); | |
24b84912 JK |
691 | } |
692 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
a7de6086 JK |
693 | err = f2fs_convert_inline_inode(inode); |
694 | if (err) | |
695 | return err; | |
b439b103 | 696 | } |
24b84912 JK |
697 | if (!f2fs_has_inline_data(inode)) |
698 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
a7de6086 | 699 | return err; |
59b802e5 JK |
700 | } |
701 | ||
0a8165d7 | 702 | /* |
003a3e1d JK |
703 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
704 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
705 | * If original data blocks are allocated, then give them to blockdev. |
706 | * Otherwise, | |
707 | * a. preallocate requested block addresses | |
708 | * b. do not use extent cache for better performance | |
709 | * c. give the block addresses to blockdev | |
eb47b800 | 710 | */ |
d323d005 | 711 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 712 | int create, int flag) |
eb47b800 | 713 | { |
003a3e1d | 714 | unsigned int maxblocks = map->m_len; |
eb47b800 | 715 | struct dnode_of_data dn; |
f9811703 | 716 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 717 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 718 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 719 | int err = 0, ofs = 1; |
46008c6d CY |
720 | unsigned int ofs_in_node, last_ofs_in_node; |
721 | blkcnt_t prealloc; | |
a2e7d1bf | 722 | struct extent_info ei; |
7df3a431 | 723 | block_t blkaddr; |
eb47b800 | 724 | |
dfd02e4d CY |
725 | if (!maxblocks) |
726 | return 0; | |
727 | ||
003a3e1d JK |
728 | map->m_len = 0; |
729 | map->m_flags = 0; | |
730 | ||
731 | /* it only supports block size == page size */ | |
732 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 733 | end = pgofs + maxblocks; |
eb47b800 | 734 | |
24b84912 | 735 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
736 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
737 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
738 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 739 | goto out; |
a2e7d1bf | 740 | } |
bfad7c2d | 741 | |
4fe71e88 | 742 | next_dnode: |
59b802e5 | 743 | if (create) |
3104af35 | 744 | f2fs_lock_op(sbi); |
eb47b800 JK |
745 | |
746 | /* When reading holes, we need its node page */ | |
747 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 748 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 749 | if (err) { |
43473f96 CY |
750 | if (flag == F2FS_GET_BLOCK_BMAP) |
751 | map->m_pblk = 0; | |
da85985c | 752 | if (err == -ENOENT) { |
bfad7c2d | 753 | err = 0; |
da85985c CY |
754 | if (map->m_next_pgofs) |
755 | *map->m_next_pgofs = | |
756 | get_next_page_offset(&dn, pgofs); | |
757 | } | |
bfad7c2d | 758 | goto unlock_out; |
848753aa | 759 | } |
973163fc | 760 | |
46008c6d | 761 | prealloc = 0; |
230436b3 | 762 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 763 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
764 | |
765 | next_block: | |
766 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
767 | ||
768 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 769 | if (create) { |
f9811703 CY |
770 | if (unlikely(f2fs_cp_error(sbi))) { |
771 | err = -EIO; | |
4fe71e88 | 772 | goto sync_out; |
f9811703 | 773 | } |
24b84912 | 774 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
775 | if (blkaddr == NULL_ADDR) { |
776 | prealloc++; | |
777 | last_ofs_in_node = dn.ofs_in_node; | |
778 | } | |
24b84912 JK |
779 | } else { |
780 | err = __allocate_data_block(&dn); | |
6f2d8ed6 | 781 | if (!err) |
91942321 | 782 | set_inode_flag(inode, FI_APPEND_WRITE); |
24b84912 | 783 | } |
973163fc | 784 | if (err) |
4fe71e88 | 785 | goto sync_out; |
973163fc | 786 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 787 | blkaddr = dn.data_blkaddr; |
973163fc | 788 | } else { |
43473f96 CY |
789 | if (flag == F2FS_GET_BLOCK_BMAP) { |
790 | map->m_pblk = 0; | |
791 | goto sync_out; | |
792 | } | |
da85985c CY |
793 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
794 | blkaddr == NULL_ADDR) { | |
795 | if (map->m_next_pgofs) | |
796 | *map->m_next_pgofs = pgofs + 1; | |
797 | } | |
973163fc | 798 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 799 | blkaddr != NEW_ADDR) |
4fe71e88 | 800 | goto sync_out; |
e2b4e2bc | 801 | } |
e2b4e2bc | 802 | } |
eb47b800 | 803 | |
46008c6d CY |
804 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
805 | goto skip; | |
806 | ||
4fe71e88 CY |
807 | if (map->m_len == 0) { |
808 | /* preallocated unwritten block should be mapped for fiemap. */ | |
809 | if (blkaddr == NEW_ADDR) | |
810 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
811 | map->m_flags |= F2FS_MAP_MAPPED; | |
812 | ||
813 | map->m_pblk = blkaddr; | |
814 | map->m_len = 1; | |
815 | } else if ((map->m_pblk != NEW_ADDR && | |
816 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 817 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 818 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
819 | ofs++; |
820 | map->m_len++; | |
821 | } else { | |
822 | goto sync_out; | |
823 | } | |
bfad7c2d | 824 | |
46008c6d | 825 | skip: |
bfad7c2d JK |
826 | dn.ofs_in_node++; |
827 | pgofs++; | |
828 | ||
46008c6d CY |
829 | /* preallocate blocks in batch for one dnode page */ |
830 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
831 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 832 | |
46008c6d CY |
833 | dn.ofs_in_node = ofs_in_node; |
834 | err = reserve_new_blocks(&dn, prealloc); | |
835 | if (err) | |
836 | goto sync_out; | |
bfad7c2d | 837 | |
46008c6d CY |
838 | map->m_len += dn.ofs_in_node - ofs_in_node; |
839 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
840 | err = -ENOSPC; | |
841 | goto sync_out; | |
3104af35 | 842 | } |
46008c6d CY |
843 | dn.ofs_in_node = end_offset; |
844 | } | |
845 | ||
846 | if (pgofs >= end) | |
847 | goto sync_out; | |
848 | else if (dn.ofs_in_node < end_offset) | |
849 | goto next_block; | |
850 | ||
46008c6d CY |
851 | f2fs_put_dnode(&dn); |
852 | ||
853 | if (create) { | |
854 | f2fs_unlock_op(sbi); | |
6f2d8ed6 | 855 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 856 | } |
46008c6d | 857 | goto next_dnode; |
7df3a431 | 858 | |
bfad7c2d | 859 | sync_out: |
eb47b800 | 860 | f2fs_put_dnode(&dn); |
bfad7c2d | 861 | unlock_out: |
2a340760 | 862 | if (create) { |
3104af35 | 863 | f2fs_unlock_op(sbi); |
6f2d8ed6 | 864 | f2fs_balance_fs(sbi, dn.node_changed); |
2a340760 | 865 | } |
bfad7c2d | 866 | out: |
003a3e1d | 867 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 868 | return err; |
eb47b800 JK |
869 | } |
870 | ||
003a3e1d | 871 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
872 | struct buffer_head *bh, int create, int flag, |
873 | pgoff_t *next_pgofs) | |
003a3e1d JK |
874 | { |
875 | struct f2fs_map_blocks map; | |
a7de6086 | 876 | int err; |
003a3e1d JK |
877 | |
878 | map.m_lblk = iblock; | |
879 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 880 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 881 | |
a7de6086 JK |
882 | err = f2fs_map_blocks(inode, &map, create, flag); |
883 | if (!err) { | |
003a3e1d JK |
884 | map_bh(bh, inode->i_sb, map.m_pblk); |
885 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
886 | bh->b_size = map.m_len << inode->i_blkbits; | |
887 | } | |
a7de6086 | 888 | return err; |
003a3e1d JK |
889 | } |
890 | ||
ccfb3000 | 891 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
892 | struct buffer_head *bh_result, int create, int flag, |
893 | pgoff_t *next_pgofs) | |
e2b4e2bc | 894 | { |
da85985c CY |
895 | return __get_data_block(inode, iblock, bh_result, create, |
896 | flag, next_pgofs); | |
e2b4e2bc CY |
897 | } |
898 | ||
899 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
900 | struct buffer_head *bh_result, int create) |
901 | { | |
e2b4e2bc | 902 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 903 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
904 | } |
905 | ||
e2b4e2bc | 906 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
907 | struct buffer_head *bh_result, int create) |
908 | { | |
179448bf | 909 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 910 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
911 | return -EFBIG; |
912 | ||
e2b4e2bc | 913 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 914 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
915 | } |
916 | ||
7f63eb77 JK |
917 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
918 | { | |
919 | return (offset >> inode->i_blkbits); | |
920 | } | |
921 | ||
922 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
923 | { | |
924 | return (blk << inode->i_blkbits); | |
925 | } | |
926 | ||
9ab70134 JK |
927 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
928 | u64 start, u64 len) | |
929 | { | |
7f63eb77 JK |
930 | struct buffer_head map_bh; |
931 | sector_t start_blk, last_blk; | |
da85985c | 932 | pgoff_t next_pgofs; |
7f63eb77 JK |
933 | u64 logical = 0, phys = 0, size = 0; |
934 | u32 flags = 0; | |
7f63eb77 JK |
935 | int ret = 0; |
936 | ||
937 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
938 | if (ret) | |
939 | return ret; | |
940 | ||
67f8cf3c JK |
941 | if (f2fs_has_inline_data(inode)) { |
942 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
943 | if (ret != -EAGAIN) | |
944 | return ret; | |
945 | } | |
946 | ||
5955102c | 947 | inode_lock(inode); |
de1475cc | 948 | |
7f63eb77 JK |
949 | if (logical_to_blk(inode, len) == 0) |
950 | len = blk_to_logical(inode, 1); | |
951 | ||
952 | start_blk = logical_to_blk(inode, start); | |
953 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 954 | |
7f63eb77 JK |
955 | next: |
956 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
957 | map_bh.b_size = len; | |
958 | ||
e2b4e2bc | 959 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 960 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
961 | if (ret) |
962 | goto out; | |
963 | ||
964 | /* HOLE */ | |
965 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 966 | start_blk = next_pgofs; |
58736fa6 CY |
967 | |
968 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
969 | F2FS_I_SB(inode)->max_file_blocks)) | |
9a950d52 | 970 | goto prep_next; |
58736fa6 | 971 | |
9a950d52 FL |
972 | flags |= FIEMAP_EXTENT_LAST; |
973 | } | |
7f63eb77 | 974 | |
da5af127 CY |
975 | if (size) { |
976 | if (f2fs_encrypted_inode(inode)) | |
977 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
978 | ||
9a950d52 FL |
979 | ret = fiemap_fill_next_extent(fieinfo, logical, |
980 | phys, size, flags); | |
da5af127 | 981 | } |
7f63eb77 | 982 | |
9a950d52 FL |
983 | if (start_blk > last_blk || ret) |
984 | goto out; | |
7f63eb77 | 985 | |
9a950d52 FL |
986 | logical = blk_to_logical(inode, start_blk); |
987 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
988 | size = map_bh.b_size; | |
989 | flags = 0; | |
990 | if (buffer_unwritten(&map_bh)) | |
991 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 992 | |
9a950d52 | 993 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 994 | |
9a950d52 | 995 | prep_next: |
7f63eb77 JK |
996 | cond_resched(); |
997 | if (fatal_signal_pending(current)) | |
998 | ret = -EINTR; | |
999 | else | |
1000 | goto next; | |
1001 | out: | |
1002 | if (ret == 1) | |
1003 | ret = 0; | |
1004 | ||
5955102c | 1005 | inode_unlock(inode); |
7f63eb77 | 1006 | return ret; |
9ab70134 JK |
1007 | } |
1008 | ||
6a7a3aed WY |
1009 | static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
1010 | unsigned nr_pages) | |
78682f79 CY |
1011 | { |
1012 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
1013 | struct fscrypt_ctx *ctx = NULL; | |
78682f79 CY |
1014 | struct bio *bio; |
1015 | ||
1016 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { | |
1017 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
1018 | if (IS_ERR(ctx)) | |
1019 | return ERR_CAST(ctx); | |
1020 | ||
1021 | /* wait the page to be moved by cleaning */ | |
1022 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
1023 | } | |
1024 | ||
1025 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
1026 | if (!bio) { | |
1027 | if (ctx) | |
1028 | fscrypt_release_ctx(ctx); | |
1029 | return ERR_PTR(-ENOMEM); | |
1030 | } | |
3c62be17 | 1031 | f2fs_target_device(sbi, blkaddr, bio); |
78682f79 CY |
1032 | bio->bi_end_io = f2fs_read_end_io; |
1033 | bio->bi_private = ctx; | |
1034 | ||
1035 | return bio; | |
1036 | } | |
1037 | ||
f1e88660 JK |
1038 | /* |
1039 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1040 | * Major change was from block_size == page_size in f2fs by default. | |
1041 | */ | |
1042 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1043 | struct list_head *pages, struct page *page, | |
1044 | unsigned nr_pages) | |
1045 | { | |
1046 | struct bio *bio = NULL; | |
1047 | unsigned page_idx; | |
1048 | sector_t last_block_in_bio = 0; | |
1049 | struct inode *inode = mapping->host; | |
1050 | const unsigned blkbits = inode->i_blkbits; | |
1051 | const unsigned blocksize = 1 << blkbits; | |
1052 | sector_t block_in_file; | |
1053 | sector_t last_block; | |
1054 | sector_t last_block_in_file; | |
1055 | sector_t block_nr; | |
f1e88660 JK |
1056 | struct f2fs_map_blocks map; |
1057 | ||
1058 | map.m_pblk = 0; | |
1059 | map.m_lblk = 0; | |
1060 | map.m_len = 0; | |
1061 | map.m_flags = 0; | |
da85985c | 1062 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1063 | |
1064 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1065 | ||
1066 | prefetchw(&page->flags); | |
1067 | if (pages) { | |
1068 | page = list_entry(pages->prev, struct page, lru); | |
1069 | list_del(&page->lru); | |
1070 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1071 | page->index, |
1072 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1073 | goto next_page; |
1074 | } | |
1075 | ||
1076 | block_in_file = (sector_t)page->index; | |
1077 | last_block = block_in_file + nr_pages; | |
1078 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1079 | blkbits; | |
1080 | if (last_block > last_block_in_file) | |
1081 | last_block = last_block_in_file; | |
1082 | ||
1083 | /* | |
1084 | * Map blocks using the previous result first. | |
1085 | */ | |
1086 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1087 | block_in_file > map.m_lblk && | |
1088 | block_in_file < (map.m_lblk + map.m_len)) | |
1089 | goto got_it; | |
1090 | ||
1091 | /* | |
1092 | * Then do more f2fs_map_blocks() calls until we are | |
1093 | * done with this page. | |
1094 | */ | |
1095 | map.m_flags = 0; | |
1096 | ||
1097 | if (block_in_file < last_block) { | |
1098 | map.m_lblk = block_in_file; | |
1099 | map.m_len = last_block - block_in_file; | |
1100 | ||
46c9e141 | 1101 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1102 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1103 | goto set_error_page; |
1104 | } | |
1105 | got_it: | |
1106 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1107 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1108 | SetPageMappedToDisk(page); | |
1109 | ||
1110 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1111 | SetPageUptodate(page); | |
1112 | goto confused; | |
1113 | } | |
1114 | } else { | |
09cbfeaf | 1115 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
1116 | if (!PageUptodate(page)) |
1117 | SetPageUptodate(page); | |
f1e88660 JK |
1118 | unlock_page(page); |
1119 | goto next_page; | |
1120 | } | |
1121 | ||
1122 | /* | |
1123 | * This page will go to BIO. Do we need to send this | |
1124 | * BIO off first? | |
1125 | */ | |
3c62be17 JK |
1126 | if (bio && (last_block_in_bio != block_nr - 1 || |
1127 | !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) { | |
f1e88660 | 1128 | submit_and_realloc: |
4fc29c1a | 1129 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1130 | bio = NULL; |
1131 | } | |
1132 | if (bio == NULL) { | |
78682f79 | 1133 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1d353eb7 JK |
1134 | if (IS_ERR(bio)) { |
1135 | bio = NULL; | |
f1e88660 | 1136 | goto set_error_page; |
4375a336 | 1137 | } |
04d328de | 1138 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1139 | } |
1140 | ||
1141 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1142 | goto submit_and_realloc; | |
1143 | ||
1144 | last_block_in_bio = block_nr; | |
1145 | goto next_page; | |
1146 | set_error_page: | |
1147 | SetPageError(page); | |
09cbfeaf | 1148 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1149 | unlock_page(page); |
1150 | goto next_page; | |
1151 | confused: | |
1152 | if (bio) { | |
4fc29c1a | 1153 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1154 | bio = NULL; |
1155 | } | |
1156 | unlock_page(page); | |
1157 | next_page: | |
1158 | if (pages) | |
09cbfeaf | 1159 | put_page(page); |
f1e88660 JK |
1160 | } |
1161 | BUG_ON(pages && !list_empty(pages)); | |
1162 | if (bio) | |
4fc29c1a | 1163 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1164 | return 0; |
1165 | } | |
1166 | ||
eb47b800 JK |
1167 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1168 | { | |
9ffe0fb5 | 1169 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1170 | int ret = -EAGAIN; |
9ffe0fb5 | 1171 | |
c20e89cd CY |
1172 | trace_f2fs_readpage(page, DATA); |
1173 | ||
e1c42045 | 1174 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1175 | if (f2fs_has_inline_data(inode)) |
1176 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1177 | if (ret == -EAGAIN) |
f1e88660 | 1178 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1179 | return ret; |
eb47b800 JK |
1180 | } |
1181 | ||
1182 | static int f2fs_read_data_pages(struct file *file, | |
1183 | struct address_space *mapping, | |
1184 | struct list_head *pages, unsigned nr_pages) | |
1185 | { | |
9ffe0fb5 | 1186 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1187 | struct page *page = list_entry(pages->prev, struct page, lru); |
1188 | ||
1189 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1190 | |
1191 | /* If the file has inline data, skip readpages */ | |
1192 | if (f2fs_has_inline_data(inode)) | |
1193 | return 0; | |
1194 | ||
f1e88660 | 1195 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1196 | } |
1197 | ||
05ca3632 | 1198 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1199 | { |
05ca3632 | 1200 | struct page *page = fio->page; |
eb47b800 | 1201 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1202 | struct dnode_of_data dn; |
1203 | int err = 0; | |
1204 | ||
1205 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1206 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1207 | if (err) |
1208 | return err; | |
1209 | ||
28bc106b | 1210 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1211 | |
1212 | /* This page is already truncated */ | |
7a9d7548 | 1213 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1214 | ClearPageUptodate(page); |
eb47b800 | 1215 | goto out_writepage; |
2bca1e23 | 1216 | } |
eb47b800 | 1217 | |
4375a336 | 1218 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1219 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1220 | |
1221 | /* wait for GCed encrypted page writeback */ | |
1222 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1223 | fio->old_blkaddr); |
b32e4482 JK |
1224 | retry_encrypt: |
1225 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1226 | gfp_flags); | |
4375a336 JK |
1227 | if (IS_ERR(fio->encrypted_page)) { |
1228 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1229 | if (err == -ENOMEM) { |
1230 | /* flush pending ios and wait for a while */ | |
1231 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1232 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1233 | gfp_flags |= __GFP_NOFAIL; | |
1234 | err = 0; | |
1235 | goto retry_encrypt; | |
1236 | } | |
4375a336 JK |
1237 | goto out_writepage; |
1238 | } | |
1239 | } | |
1240 | ||
eb47b800 JK |
1241 | set_page_writeback(page); |
1242 | ||
1243 | /* | |
1244 | * If current allocation needs SSR, | |
1245 | * it had better in-place writes for updated data. | |
1246 | */ | |
7a9d7548 | 1247 | if (unlikely(fio->old_blkaddr != NEW_ADDR && |
b25958b6 | 1248 | !is_cold_data(page) && |
2da3e027 | 1249 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1250 | need_inplace_update(inode))) { |
05ca3632 | 1251 | rewrite_data_page(fio); |
91942321 | 1252 | set_inode_flag(inode, FI_UPDATE_WRITE); |
8ce67cb0 | 1253 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1254 | } else { |
05ca3632 | 1255 | write_data_page(&dn, fio); |
8ce67cb0 | 1256 | trace_f2fs_do_write_data_page(page, OPU); |
91942321 | 1257 | set_inode_flag(inode, FI_APPEND_WRITE); |
3c6c2beb | 1258 | if (page->index == 0) |
91942321 | 1259 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
eb47b800 JK |
1260 | } |
1261 | out_writepage: | |
1262 | f2fs_put_dnode(&dn); | |
1263 | return err; | |
1264 | } | |
1265 | ||
1266 | static int f2fs_write_data_page(struct page *page, | |
1267 | struct writeback_control *wbc) | |
1268 | { | |
1269 | struct inode *inode = page->mapping->host; | |
4081363f | 1270 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1271 | loff_t i_size = i_size_read(inode); |
1272 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1273 | >> PAGE_SHIFT; |
26de9b11 | 1274 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1275 | unsigned offset = 0; |
39936837 | 1276 | bool need_balance_fs = false; |
eb47b800 | 1277 | int err = 0; |
458e6197 | 1278 | struct f2fs_io_info fio = { |
05ca3632 | 1279 | .sbi = sbi, |
458e6197 | 1280 | .type = DATA, |
04d328de MC |
1281 | .op = REQ_OP_WRITE, |
1282 | .op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0, | |
05ca3632 | 1283 | .page = page, |
4375a336 | 1284 | .encrypted_page = NULL, |
458e6197 | 1285 | }; |
eb47b800 | 1286 | |
ecda0de3 CY |
1287 | trace_f2fs_writepage(page, DATA); |
1288 | ||
eb47b800 | 1289 | if (page->index < end_index) |
39936837 | 1290 | goto write; |
eb47b800 JK |
1291 | |
1292 | /* | |
1293 | * If the offset is out-of-range of file size, | |
1294 | * this page does not have to be written to disk. | |
1295 | */ | |
09cbfeaf | 1296 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1297 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1298 | goto out; |
eb47b800 | 1299 | |
09cbfeaf | 1300 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1301 | write: |
caf0047e | 1302 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1303 | goto redirty_out; |
1e84371f JK |
1304 | if (f2fs_is_drop_cache(inode)) |
1305 | goto out; | |
e6e5f561 JK |
1306 | /* we should not write 0'th page having journal header */ |
1307 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1308 | (!wbc->for_reclaim && | |
1309 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1310 | goto redirty_out; |
eb47b800 | 1311 | |
cf779cab JK |
1312 | /* we should bypass data pages to proceed the kworkder jobs */ |
1313 | if (unlikely(f2fs_cp_error(sbi))) { | |
7f319975 | 1314 | mapping_set_error(page->mapping, -EIO); |
a7ffdbe2 | 1315 | goto out; |
cf779cab JK |
1316 | } |
1317 | ||
39936837 | 1318 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1319 | if (S_ISDIR(inode->i_mode)) { |
05ca3632 | 1320 | err = do_write_data_page(&fio); |
8618b881 JK |
1321 | goto done; |
1322 | } | |
9ffe0fb5 | 1323 | |
8618b881 | 1324 | if (!wbc->for_reclaim) |
39936837 | 1325 | need_balance_fs = true; |
7f3037a5 | 1326 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1327 | goto redirty_out; |
eb47b800 | 1328 | |
b3d208f9 | 1329 | err = -EAGAIN; |
8618b881 | 1330 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1331 | if (f2fs_has_inline_data(inode)) |
1332 | err = f2fs_write_inline_data(inode, page); | |
1333 | if (err == -EAGAIN) | |
05ca3632 | 1334 | err = do_write_data_page(&fio); |
26de9b11 JK |
1335 | if (F2FS_I(inode)->last_disk_size < psize) |
1336 | F2FS_I(inode)->last_disk_size = psize; | |
8618b881 JK |
1337 | f2fs_unlock_op(sbi); |
1338 | done: | |
1339 | if (err && err != -ENOENT) | |
1340 | goto redirty_out; | |
eb47b800 | 1341 | |
eb47b800 | 1342 | clear_cold_data(page); |
39936837 | 1343 | out: |
a7ffdbe2 | 1344 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1345 | if (err) |
1346 | ClearPageUptodate(page); | |
0c3a5797 CY |
1347 | |
1348 | if (wbc->for_reclaim) { | |
1349 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1350 | remove_dirty_inode(inode); | |
1351 | } | |
1352 | ||
eb47b800 | 1353 | unlock_page(page); |
2c4db1a6 | 1354 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1355 | |
1356 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1357 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1358 | |
eb47b800 JK |
1359 | return 0; |
1360 | ||
eb47b800 | 1361 | redirty_out: |
76f60268 | 1362 | redirty_page_for_writepage(wbc, page); |
b230e6ca JK |
1363 | unlock_page(page); |
1364 | return err; | |
fa9150a8 NJ |
1365 | } |
1366 | ||
8f46dcae CY |
1367 | /* |
1368 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1369 | * The major change is making write step of cold data page separately from | |
1370 | * warm/hot data page. | |
1371 | */ | |
1372 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b230e6ca | 1373 | struct writeback_control *wbc) |
8f46dcae CY |
1374 | { |
1375 | int ret = 0; | |
1376 | int done = 0; | |
1377 | struct pagevec pvec; | |
1378 | int nr_pages; | |
1379 | pgoff_t uninitialized_var(writeback_index); | |
1380 | pgoff_t index; | |
1381 | pgoff_t end; /* Inclusive */ | |
1382 | pgoff_t done_index; | |
1383 | int cycled; | |
1384 | int range_whole = 0; | |
1385 | int tag; | |
6ca56ca4 | 1386 | int nwritten = 0; |
8f46dcae CY |
1387 | |
1388 | pagevec_init(&pvec, 0); | |
46ae957f | 1389 | |
8f46dcae CY |
1390 | if (wbc->range_cyclic) { |
1391 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1392 | index = writeback_index; | |
1393 | if (index == 0) | |
1394 | cycled = 1; | |
1395 | else | |
1396 | cycled = 0; | |
1397 | end = -1; | |
1398 | } else { | |
09cbfeaf KS |
1399 | index = wbc->range_start >> PAGE_SHIFT; |
1400 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1401 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1402 | range_whole = 1; | |
1403 | cycled = 1; /* ignore range_cyclic tests */ | |
1404 | } | |
1405 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1406 | tag = PAGECACHE_TAG_TOWRITE; | |
1407 | else | |
1408 | tag = PAGECACHE_TAG_DIRTY; | |
1409 | retry: | |
1410 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1411 | tag_pages_for_writeback(mapping, index, end); | |
1412 | done_index = index; | |
1413 | while (!done && (index <= end)) { | |
1414 | int i; | |
1415 | ||
1416 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1417 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1418 | if (nr_pages == 0) | |
1419 | break; | |
1420 | ||
1421 | for (i = 0; i < nr_pages; i++) { | |
1422 | struct page *page = pvec.pages[i]; | |
1423 | ||
1424 | if (page->index > end) { | |
1425 | done = 1; | |
1426 | break; | |
1427 | } | |
1428 | ||
1429 | done_index = page->index; | |
1430 | ||
1431 | lock_page(page); | |
1432 | ||
1433 | if (unlikely(page->mapping != mapping)) { | |
1434 | continue_unlock: | |
1435 | unlock_page(page); | |
1436 | continue; | |
1437 | } | |
1438 | ||
1439 | if (!PageDirty(page)) { | |
1440 | /* someone wrote it for us */ | |
1441 | goto continue_unlock; | |
1442 | } | |
1443 | ||
8f46dcae CY |
1444 | if (PageWriteback(page)) { |
1445 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1446 | f2fs_wait_on_page_writeback(page, |
1447 | DATA, true); | |
8f46dcae CY |
1448 | else |
1449 | goto continue_unlock; | |
1450 | } | |
1451 | ||
1452 | BUG_ON(PageWriteback(page)); | |
1453 | if (!clear_page_dirty_for_io(page)) | |
1454 | goto continue_unlock; | |
1455 | ||
b230e6ca | 1456 | ret = mapping->a_ops->writepage(page, wbc); |
8f46dcae | 1457 | if (unlikely(ret)) { |
b230e6ca JK |
1458 | done_index = page->index + 1; |
1459 | done = 1; | |
1460 | break; | |
6ca56ca4 CY |
1461 | } else { |
1462 | nwritten++; | |
8f46dcae CY |
1463 | } |
1464 | ||
1465 | if (--wbc->nr_to_write <= 0 && | |
1466 | wbc->sync_mode == WB_SYNC_NONE) { | |
1467 | done = 1; | |
1468 | break; | |
1469 | } | |
1470 | } | |
1471 | pagevec_release(&pvec); | |
1472 | cond_resched(); | |
1473 | } | |
1474 | ||
8f46dcae CY |
1475 | if (!cycled && !done) { |
1476 | cycled = 1; | |
1477 | index = 0; | |
1478 | end = writeback_index - 1; | |
1479 | goto retry; | |
1480 | } | |
1481 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1482 | mapping->writeback_index = done_index; | |
1483 | ||
6ca56ca4 CY |
1484 | if (nwritten) |
1485 | f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping), mapping->host, | |
1486 | NULL, 0, DATA, WRITE); | |
1487 | ||
8f46dcae CY |
1488 | return ret; |
1489 | } | |
1490 | ||
25ca923b | 1491 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1492 | struct writeback_control *wbc) |
1493 | { | |
1494 | struct inode *inode = mapping->host; | |
4081363f | 1495 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 1496 | struct blk_plug plug; |
eb47b800 | 1497 | int ret; |
eb47b800 | 1498 | |
cfb185a1 | 1499 | /* deal with chardevs and other special file */ |
1500 | if (!mapping->a_ops->writepage) | |
1501 | return 0; | |
1502 | ||
6a290544 CY |
1503 | /* skip writing if there is no dirty page in this inode */ |
1504 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1505 | return 0; | |
1506 | ||
a1257023 JK |
1507 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1508 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1509 | available_free_memory(sbi, DIRTY_DENTS)) | |
1510 | goto skip_write; | |
1511 | ||
d323d005 | 1512 | /* skip writing during file defragment */ |
91942321 | 1513 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
1514 | goto skip_write; |
1515 | ||
d5669f7b JK |
1516 | /* during POR, we don't need to trigger writepage at all. */ |
1517 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1518 | goto skip_write; | |
1519 | ||
d31c7c3f YH |
1520 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1521 | ||
9dfa1baf | 1522 | blk_start_plug(&plug); |
b230e6ca | 1523 | ret = f2fs_write_cache_pages(mapping, wbc); |
9dfa1baf | 1524 | blk_finish_plug(&plug); |
28ea6162 JK |
1525 | /* |
1526 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1527 | * to detect pending bios. | |
1528 | */ | |
458e6197 | 1529 | |
c227f912 | 1530 | remove_dirty_inode(inode); |
eb47b800 | 1531 | return ret; |
d3baf95d JK |
1532 | |
1533 | skip_write: | |
a7ffdbe2 | 1534 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1535 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1536 | return 0; |
eb47b800 JK |
1537 | } |
1538 | ||
3aab8f82 CY |
1539 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1540 | { | |
1541 | struct inode *inode = mapping->host; | |
819d9153 | 1542 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1543 | |
819d9153 JK |
1544 | if (to > i_size) { |
1545 | truncate_pagecache(inode, i_size); | |
1546 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1547 | } |
1548 | } | |
1549 | ||
2aadac08 JK |
1550 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1551 | struct page *page, loff_t pos, unsigned len, | |
1552 | block_t *blk_addr, bool *node_changed) | |
1553 | { | |
1554 | struct inode *inode = page->mapping->host; | |
1555 | pgoff_t index = page->index; | |
1556 | struct dnode_of_data dn; | |
1557 | struct page *ipage; | |
b4d07a3e JK |
1558 | bool locked = false; |
1559 | struct extent_info ei; | |
2aadac08 JK |
1560 | int err = 0; |
1561 | ||
24b84912 JK |
1562 | /* |
1563 | * we already allocated all the blocks, so we don't need to get | |
1564 | * the block addresses when there is no need to fill the page. | |
1565 | */ | |
5d4c0af4 | 1566 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE) |
24b84912 JK |
1567 | return 0; |
1568 | ||
b4d07a3e | 1569 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1570 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1571 | f2fs_lock_op(sbi); |
1572 | locked = true; | |
1573 | } | |
1574 | restart: | |
2aadac08 JK |
1575 | /* check inline_data */ |
1576 | ipage = get_node_page(sbi, inode->i_ino); | |
1577 | if (IS_ERR(ipage)) { | |
1578 | err = PTR_ERR(ipage); | |
1579 | goto unlock_out; | |
1580 | } | |
1581 | ||
1582 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1583 | ||
1584 | if (f2fs_has_inline_data(inode)) { | |
1585 | if (pos + len <= MAX_INLINE_DATA) { | |
1586 | read_inline_data(page, ipage); | |
91942321 | 1587 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
1588 | if (inode->i_nlink) |
1589 | set_inline_node(ipage); | |
2aadac08 JK |
1590 | } else { |
1591 | err = f2fs_convert_inline_page(&dn, page); | |
1592 | if (err) | |
b4d07a3e JK |
1593 | goto out; |
1594 | if (dn.data_blkaddr == NULL_ADDR) | |
1595 | err = f2fs_get_block(&dn, index); | |
1596 | } | |
1597 | } else if (locked) { | |
1598 | err = f2fs_get_block(&dn, index); | |
1599 | } else { | |
1600 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1601 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1602 | } else { | |
b4d07a3e JK |
1603 | /* hole case */ |
1604 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1605 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1606 | f2fs_put_dnode(&dn); |
1607 | f2fs_lock_op(sbi); | |
1608 | locked = true; | |
1609 | goto restart; | |
1610 | } | |
2aadac08 JK |
1611 | } |
1612 | } | |
b4d07a3e | 1613 | |
2aadac08 JK |
1614 | /* convert_inline_page can make node_changed */ |
1615 | *blk_addr = dn.data_blkaddr; | |
1616 | *node_changed = dn.node_changed; | |
b4d07a3e | 1617 | out: |
2aadac08 JK |
1618 | f2fs_put_dnode(&dn); |
1619 | unlock_out: | |
b4d07a3e JK |
1620 | if (locked) |
1621 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1622 | return err; |
1623 | } | |
1624 | ||
eb47b800 JK |
1625 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1626 | loff_t pos, unsigned len, unsigned flags, | |
1627 | struct page **pagep, void **fsdata) | |
1628 | { | |
1629 | struct inode *inode = mapping->host; | |
4081363f | 1630 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1631 | struct page *page = NULL; |
09cbfeaf | 1632 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1633 | bool need_balance = false; |
1634 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1635 | int err = 0; |
1636 | ||
62aed044 CY |
1637 | trace_f2fs_write_begin(inode, pos, len, flags); |
1638 | ||
5f727395 JK |
1639 | /* |
1640 | * We should check this at this moment to avoid deadlock on inode page | |
1641 | * and #0 page. The locking rule for inline_data conversion should be: | |
1642 | * lock_page(page #0) -> lock_page(inode_page) | |
1643 | */ | |
1644 | if (index != 0) { | |
1645 | err = f2fs_convert_inline_inode(inode); | |
1646 | if (err) | |
1647 | goto fail; | |
1648 | } | |
afcb7ca0 | 1649 | repeat: |
eb47b800 | 1650 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
1651 | if (!page) { |
1652 | err = -ENOMEM; | |
1653 | goto fail; | |
1654 | } | |
d5f66990 | 1655 | |
eb47b800 JK |
1656 | *pagep = page; |
1657 | ||
2aadac08 JK |
1658 | err = prepare_write_begin(sbi, page, pos, len, |
1659 | &blkaddr, &need_balance); | |
9ba69cf9 | 1660 | if (err) |
2aadac08 | 1661 | goto fail; |
9ba69cf9 | 1662 | |
7f3037a5 | 1663 | if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) { |
2a340760 | 1664 | unlock_page(page); |
2c4db1a6 | 1665 | f2fs_balance_fs(sbi, true); |
2a340760 JK |
1666 | lock_page(page); |
1667 | if (page->mapping != mapping) { | |
1668 | /* The page got truncated from under us */ | |
1669 | f2fs_put_page(page, 1); | |
1670 | goto repeat; | |
1671 | } | |
1672 | } | |
1673 | ||
fec1d657 | 1674 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 1675 | |
08b39fbd CY |
1676 | /* wait for GCed encrypted page writeback */ |
1677 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) | |
2aadac08 | 1678 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); |
08b39fbd | 1679 | |
649d7df2 JK |
1680 | if (len == PAGE_SIZE || PageUptodate(page)) |
1681 | return 0; | |
eb47b800 | 1682 | |
2aadac08 | 1683 | if (blkaddr == NEW_ADDR) { |
09cbfeaf | 1684 | zero_user_segment(page, 0, PAGE_SIZE); |
649d7df2 | 1685 | SetPageUptodate(page); |
eb47b800 | 1686 | } else { |
78682f79 | 1687 | struct bio *bio; |
d54c795b | 1688 | |
78682f79 CY |
1689 | bio = f2fs_grab_bio(inode, blkaddr, 1); |
1690 | if (IS_ERR(bio)) { | |
1691 | err = PTR_ERR(bio); | |
3aab8f82 | 1692 | goto fail; |
eb47b800 | 1693 | } |
4fc29c1a | 1694 | bio_set_op_attrs(bio, REQ_OP_READ, READ_SYNC); |
78682f79 CY |
1695 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
1696 | bio_put(bio); | |
1697 | err = -EFAULT; | |
1698 | goto fail; | |
1699 | } | |
1700 | ||
4fc29c1a | 1701 | __submit_bio(sbi, bio, DATA); |
d54c795b | 1702 | |
393ff91f | 1703 | lock_page(page); |
6bacf52f | 1704 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1705 | f2fs_put_page(page, 1); |
1706 | goto repeat; | |
eb47b800 | 1707 | } |
1563ac75 CY |
1708 | if (unlikely(!PageUptodate(page))) { |
1709 | err = -EIO; | |
1710 | goto fail; | |
4375a336 | 1711 | } |
eb47b800 | 1712 | } |
eb47b800 | 1713 | return 0; |
9ba69cf9 | 1714 | |
3aab8f82 | 1715 | fail: |
86531d6b | 1716 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1717 | f2fs_write_failed(mapping, pos + len); |
1718 | return err; | |
eb47b800 JK |
1719 | } |
1720 | ||
a1dd3c13 JK |
1721 | static int f2fs_write_end(struct file *file, |
1722 | struct address_space *mapping, | |
1723 | loff_t pos, unsigned len, unsigned copied, | |
1724 | struct page *page, void *fsdata) | |
1725 | { | |
1726 | struct inode *inode = page->mapping->host; | |
1727 | ||
dfb2bf38 CY |
1728 | trace_f2fs_write_end(inode, pos, len, copied); |
1729 | ||
649d7df2 JK |
1730 | /* |
1731 | * This should be come from len == PAGE_SIZE, and we expect copied | |
1732 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
1733 | * let generic_perform_write() try to copy data again through copied=0. | |
1734 | */ | |
1735 | if (!PageUptodate(page)) { | |
1736 | if (unlikely(copied != PAGE_SIZE)) | |
1737 | copied = 0; | |
1738 | else | |
1739 | SetPageUptodate(page); | |
1740 | } | |
1741 | if (!copied) | |
1742 | goto unlock_out; | |
1743 | ||
34ba94ba | 1744 | set_page_dirty(page); |
649d7df2 | 1745 | clear_cold_data(page); |
a1dd3c13 | 1746 | |
fc9581c8 JK |
1747 | if (pos + copied > i_size_read(inode)) |
1748 | f2fs_i_size_write(inode, pos + copied); | |
649d7df2 | 1749 | unlock_out: |
3024c9a1 | 1750 | f2fs_put_page(page, 1); |
d0239e1b | 1751 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
1752 | return copied; |
1753 | } | |
1754 | ||
6f673763 OS |
1755 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
1756 | loff_t offset) | |
944fcfc1 JK |
1757 | { |
1758 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 1759 | |
944fcfc1 JK |
1760 | if (offset & blocksize_mask) |
1761 | return -EINVAL; | |
1762 | ||
5b46f25d AV |
1763 | if (iov_iter_alignment(iter) & blocksize_mask) |
1764 | return -EINVAL; | |
1765 | ||
944fcfc1 JK |
1766 | return 0; |
1767 | } | |
1768 | ||
c8b8e32d | 1769 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter) |
eb47b800 | 1770 | { |
b439b103 | 1771 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
1772 | struct inode *inode = mapping->host; |
1773 | size_t count = iov_iter_count(iter); | |
c8b8e32d | 1774 | loff_t offset = iocb->ki_pos; |
82e0a5aa | 1775 | int rw = iov_iter_rw(iter); |
3aab8f82 | 1776 | int err; |
944fcfc1 | 1777 | |
b439b103 | 1778 | err = check_direct_IO(inode, iter, offset); |
b9d777b8 JK |
1779 | if (err) |
1780 | return err; | |
9ffe0fb5 | 1781 | |
c040ff9d | 1782 | if (__force_buffered_io(inode, rw)) |
3c62be17 | 1783 | return 0; |
fcc85a4d | 1784 | |
5302fb00 | 1785 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 1786 | |
82e0a5aa | 1787 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
c8b8e32d | 1788 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
82e0a5aa CY |
1789 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
1790 | ||
1791 | if (rw == WRITE) { | |
6bfc4919 | 1792 | if (err > 0) |
91942321 | 1793 | set_inode_flag(inode, FI_UPDATE_WRITE); |
6bfc4919 JK |
1794 | else if (err < 0) |
1795 | f2fs_write_failed(mapping, offset + count); | |
1796 | } | |
70407fad | 1797 | |
5302fb00 | 1798 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 1799 | |
3aab8f82 | 1800 | return err; |
eb47b800 JK |
1801 | } |
1802 | ||
487261f3 CY |
1803 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1804 | unsigned int length) | |
eb47b800 JK |
1805 | { |
1806 | struct inode *inode = page->mapping->host; | |
487261f3 | 1807 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1808 | |
487261f3 | 1809 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1810 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1811 | return; |
1812 | ||
487261f3 | 1813 | if (PageDirty(page)) { |
933439c8 | 1814 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 1815 | dec_page_count(sbi, F2FS_DIRTY_META); |
933439c8 | 1816 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 1817 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
933439c8 | 1818 | } else { |
487261f3 | 1819 | inode_dec_dirty_pages(inode); |
933439c8 CY |
1820 | remove_dirty_inode(inode); |
1821 | } | |
487261f3 | 1822 | } |
decd36b6 CY |
1823 | |
1824 | /* This is atomic written page, keep Private */ | |
1825 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1826 | return; | |
1827 | ||
23dc974e | 1828 | set_page_private(page, 0); |
eb47b800 JK |
1829 | ClearPagePrivate(page); |
1830 | } | |
1831 | ||
487261f3 | 1832 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 1833 | { |
f68daeeb JK |
1834 | /* If this is dirty page, keep PagePrivate */ |
1835 | if (PageDirty(page)) | |
1836 | return 0; | |
1837 | ||
decd36b6 CY |
1838 | /* This is atomic written page, keep Private */ |
1839 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
1840 | return 0; | |
1841 | ||
23dc974e | 1842 | set_page_private(page, 0); |
eb47b800 | 1843 | ClearPagePrivate(page); |
c3850aa1 | 1844 | return 1; |
eb47b800 JK |
1845 | } |
1846 | ||
fe76b796 JK |
1847 | /* |
1848 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
1849 | * in very high speed storages. (e.g., pmem) | |
1850 | */ | |
1851 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
1852 | { | |
1853 | struct address_space *mapping = page->mapping; | |
1854 | unsigned long flags; | |
1855 | ||
1856 | if (unlikely(!mapping)) | |
1857 | return; | |
1858 | ||
1859 | spin_lock(&mapping->private_lock); | |
1860 | lock_page_memcg(page); | |
1861 | SetPageDirty(page); | |
1862 | spin_unlock(&mapping->private_lock); | |
1863 | ||
1864 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
1865 | WARN_ON_ONCE(!PageUptodate(page)); | |
1866 | account_page_dirtied(page, mapping); | |
1867 | radix_tree_tag_set(&mapping->page_tree, | |
1868 | page_index(page), PAGECACHE_TAG_DIRTY); | |
1869 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
1870 | unlock_page_memcg(page); | |
1871 | ||
1872 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
1873 | return; | |
1874 | } | |
1875 | ||
eb47b800 JK |
1876 | static int f2fs_set_data_page_dirty(struct page *page) |
1877 | { | |
1878 | struct address_space *mapping = page->mapping; | |
1879 | struct inode *inode = mapping->host; | |
1880 | ||
26c6b887 JK |
1881 | trace_f2fs_set_page_dirty(page, DATA); |
1882 | ||
237c0790 JK |
1883 | if (!PageUptodate(page)) |
1884 | SetPageUptodate(page); | |
34ba94ba | 1885 | |
1e84371f | 1886 | if (f2fs_is_atomic_file(inode)) { |
decd36b6 CY |
1887 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
1888 | register_inmem_page(inode, page); | |
1889 | return 1; | |
1890 | } | |
1891 | /* | |
1892 | * Previously, this page has been registered, we just | |
1893 | * return here. | |
1894 | */ | |
1895 | return 0; | |
34ba94ba JK |
1896 | } |
1897 | ||
eb47b800 | 1898 | if (!PageDirty(page)) { |
fe76b796 | 1899 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 1900 | update_dirty_page(inode, page); |
eb47b800 JK |
1901 | return 1; |
1902 | } | |
1903 | return 0; | |
1904 | } | |
1905 | ||
c01e54b7 JK |
1906 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1907 | { | |
454ae7e5 CY |
1908 | struct inode *inode = mapping->host; |
1909 | ||
1d373a0e JK |
1910 | if (f2fs_has_inline_data(inode)) |
1911 | return 0; | |
1912 | ||
1913 | /* make sure allocating whole blocks */ | |
1914 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
1915 | filemap_write_and_wait(mapping); | |
1916 | ||
e2b4e2bc | 1917 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
1918 | } |
1919 | ||
5b7a487c WG |
1920 | #ifdef CONFIG_MIGRATION |
1921 | #include <linux/migrate.h> | |
1922 | ||
1923 | int f2fs_migrate_page(struct address_space *mapping, | |
1924 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
1925 | { | |
1926 | int rc, extra_count; | |
1927 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
1928 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
1929 | ||
1930 | BUG_ON(PageWriteback(page)); | |
1931 | ||
1932 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
1933 | if (atomic_written && !mutex_trylock(&fi->inmem_lock)) | |
1934 | return -EAGAIN; | |
1935 | ||
1936 | /* | |
1937 | * A reference is expected if PagePrivate set when move mapping, | |
1938 | * however F2FS breaks this for maintaining dirty page counts when | |
1939 | * truncating pages. So here adjusting the 'extra_count' make it work. | |
1940 | */ | |
1941 | extra_count = (atomic_written ? 1 : 0) - page_has_private(page); | |
1942 | rc = migrate_page_move_mapping(mapping, newpage, | |
1943 | page, NULL, mode, extra_count); | |
1944 | if (rc != MIGRATEPAGE_SUCCESS) { | |
1945 | if (atomic_written) | |
1946 | mutex_unlock(&fi->inmem_lock); | |
1947 | return rc; | |
1948 | } | |
1949 | ||
1950 | if (atomic_written) { | |
1951 | struct inmem_pages *cur; | |
1952 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
1953 | if (cur->page == page) { | |
1954 | cur->page = newpage; | |
1955 | break; | |
1956 | } | |
1957 | mutex_unlock(&fi->inmem_lock); | |
1958 | put_page(page); | |
1959 | get_page(newpage); | |
1960 | } | |
1961 | ||
1962 | if (PagePrivate(page)) | |
1963 | SetPagePrivate(newpage); | |
1964 | set_page_private(newpage, page_private(page)); | |
1965 | ||
1966 | migrate_page_copy(newpage, page); | |
1967 | ||
1968 | return MIGRATEPAGE_SUCCESS; | |
1969 | } | |
1970 | #endif | |
1971 | ||
eb47b800 JK |
1972 | const struct address_space_operations f2fs_dblock_aops = { |
1973 | .readpage = f2fs_read_data_page, | |
1974 | .readpages = f2fs_read_data_pages, | |
1975 | .writepage = f2fs_write_data_page, | |
1976 | .writepages = f2fs_write_data_pages, | |
1977 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1978 | .write_end = f2fs_write_end, |
eb47b800 | 1979 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
1980 | .invalidatepage = f2fs_invalidate_page, |
1981 | .releasepage = f2fs_release_page, | |
eb47b800 | 1982 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 1983 | .bmap = f2fs_bmap, |
5b7a487c WG |
1984 | #ifdef CONFIG_MIGRATION |
1985 | .migratepage = f2fs_migrate_page, | |
1986 | #endif | |
eb47b800 | 1987 | }; |