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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 | ||
940a6d34 GZ |
90 | /* |
91 | * Low-level block read/write IO operations. | |
92 | */ | |
93 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
94 | int npages, bool is_read) | |
95 | { | |
96 | struct bio *bio; | |
97 | ||
740432f8 | 98 | bio = f2fs_bio_alloc(npages); |
940a6d34 GZ |
99 | |
100 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 101 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 102 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 103 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
104 | |
105 | return bio; | |
106 | } | |
107 | ||
4fc29c1a LT |
108 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
109 | struct bio *bio, enum page_type type) | |
f5730184 | 110 | { |
4fc29c1a | 111 | if (!is_read_io(bio_op(bio))) { |
f5730184 | 112 | atomic_inc(&sbi->nr_wb_bios); |
52763a4b JK |
113 | if (f2fs_sb_mounted_hmsmr(sbi->sb) && |
114 | current->plug && (type == DATA || type == NODE)) | |
19a5f5e2 JK |
115 | blk_finish_plug(current->plug); |
116 | } | |
4e49ea4a | 117 | submit_bio(bio); |
f5730184 JK |
118 | } |
119 | ||
458e6197 | 120 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 121 | { |
458e6197 | 122 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
123 | |
124 | if (!io->bio) | |
125 | return; | |
126 | ||
04d328de | 127 | if (is_read_io(fio->op)) |
2ace38e0 | 128 | trace_f2fs_submit_read_bio(io->sbi->sb, fio, io->bio); |
6a8f8ca5 | 129 | else |
2ace38e0 | 130 | trace_f2fs_submit_write_bio(io->sbi->sb, fio, io->bio); |
940a6d34 | 131 | |
04d328de MC |
132 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
133 | ||
4fc29c1a | 134 | __submit_bio(io->sbi, io->bio, fio->type); |
93dfe2ac JK |
135 | io->bio = NULL; |
136 | } | |
137 | ||
0c3a5797 CY |
138 | static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode, |
139 | struct page *page, nid_t ino) | |
0fd785eb | 140 | { |
0fd785eb CY |
141 | struct bio_vec *bvec; |
142 | struct page *target; | |
143 | int i; | |
144 | ||
0c3a5797 | 145 | if (!io->bio) |
0fd785eb | 146 | return false; |
0c3a5797 CY |
147 | |
148 | if (!inode && !page && !ino) | |
149 | return true; | |
0fd785eb CY |
150 | |
151 | bio_for_each_segment_all(bvec, io->bio, i) { | |
152 | ||
0b81d077 | 153 | if (bvec->bv_page->mapping) |
0fd785eb | 154 | target = bvec->bv_page; |
0b81d077 JK |
155 | else |
156 | target = fscrypt_control_page(bvec->bv_page); | |
0fd785eb | 157 | |
0c3a5797 CY |
158 | if (inode && inode == target->mapping->host) |
159 | return true; | |
160 | if (page && page == target) | |
161 | return true; | |
162 | if (ino && ino == ino_of_node(target)) | |
0fd785eb | 163 | return true; |
0fd785eb CY |
164 | } |
165 | ||
0fd785eb CY |
166 | return false; |
167 | } | |
168 | ||
0c3a5797 CY |
169 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, |
170 | struct page *page, nid_t ino, | |
171 | enum page_type type) | |
172 | { | |
173 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
174 | struct f2fs_bio_info *io = &sbi->write_io[btype]; | |
175 | bool ret; | |
176 | ||
177 | down_read(&io->io_rwsem); | |
178 | ret = __has_merged_page(io, inode, page, ino); | |
179 | up_read(&io->io_rwsem); | |
180 | return ret; | |
181 | } | |
182 | ||
183 | static void __f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
184 | struct inode *inode, struct page *page, | |
185 | nid_t ino, enum page_type type, int rw) | |
93dfe2ac JK |
186 | { |
187 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
188 | struct f2fs_bio_info *io; | |
189 | ||
190 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
191 | ||
df0f8dc0 | 192 | down_write(&io->io_rwsem); |
458e6197 | 193 | |
0c3a5797 CY |
194 | if (!__has_merged_page(io, inode, page, ino)) |
195 | goto out; | |
196 | ||
458e6197 JK |
197 | /* change META to META_FLUSH in the checkpoint procedure */ |
198 | if (type >= META_FLUSH) { | |
199 | io->fio.type = META_FLUSH; | |
04d328de | 200 | io->fio.op = REQ_OP_WRITE; |
0f7b2abd | 201 | if (test_opt(sbi, NOBARRIER)) |
04d328de | 202 | io->fio.op_flags = WRITE_FLUSH | REQ_META | REQ_PRIO; |
0f7b2abd | 203 | else |
04d328de MC |
204 | io->fio.op_flags = WRITE_FLUSH_FUA | REQ_META | |
205 | REQ_PRIO; | |
458e6197 JK |
206 | } |
207 | __submit_merged_bio(io); | |
0c3a5797 | 208 | out: |
df0f8dc0 | 209 | up_write(&io->io_rwsem); |
93dfe2ac JK |
210 | } |
211 | ||
0c3a5797 CY |
212 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, enum page_type type, |
213 | int rw) | |
214 | { | |
215 | __f2fs_submit_merged_bio(sbi, NULL, NULL, 0, type, rw); | |
216 | } | |
217 | ||
218 | void f2fs_submit_merged_bio_cond(struct f2fs_sb_info *sbi, | |
219 | struct inode *inode, struct page *page, | |
220 | nid_t ino, enum page_type type, int rw) | |
221 | { | |
222 | if (has_merged_page(sbi, inode, page, ino, type)) | |
223 | __f2fs_submit_merged_bio(sbi, inode, page, ino, type, rw); | |
224 | } | |
225 | ||
406657dd CY |
226 | void f2fs_flush_merged_bios(struct f2fs_sb_info *sbi) |
227 | { | |
228 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
229 | f2fs_submit_merged_bio(sbi, NODE, WRITE); | |
230 | f2fs_submit_merged_bio(sbi, META, WRITE); | |
231 | } | |
232 | ||
93dfe2ac JK |
233 | /* |
234 | * Fill the locked page with data located in the block address. | |
235 | * Return unlocked page. | |
236 | */ | |
05ca3632 | 237 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 238 | { |
93dfe2ac | 239 | struct bio *bio; |
0b81d077 JK |
240 | struct page *page = fio->encrypted_page ? |
241 | fio->encrypted_page : fio->page; | |
93dfe2ac | 242 | |
aafb3715 CY |
243 | if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr, |
244 | __is_meta_io(fio) ? META_GENERIC : DATA_GENERIC)) | |
245 | return -EFAULT; | |
246 | ||
2ace38e0 | 247 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 248 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
249 | |
250 | /* Allocate a new bio */ | |
04d328de | 251 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 252 | |
09cbfeaf | 253 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 254 | bio_put(bio); |
93dfe2ac JK |
255 | return -EFAULT; |
256 | } | |
04d328de | 257 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 258 | |
4fc29c1a | 259 | __submit_bio(fio->sbi, bio, fio->type); |
93dfe2ac JK |
260 | return 0; |
261 | } | |
262 | ||
05ca3632 | 263 | void f2fs_submit_page_mbio(struct f2fs_io_info *fio) |
93dfe2ac | 264 | { |
05ca3632 | 265 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 266 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 267 | struct f2fs_bio_info *io; |
04d328de | 268 | bool is_read = is_read_io(fio->op); |
4375a336 | 269 | struct page *bio_page; |
93dfe2ac | 270 | |
940a6d34 | 271 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 272 | |
d4511881 | 273 | if (__is_valid_data_blkaddr(fio->old_blkaddr)) |
89d78cf5 YH |
274 | verify_block_addr(fio, fio->old_blkaddr); |
275 | verify_block_addr(fio, fio->new_blkaddr); | |
93dfe2ac | 276 | |
df0f8dc0 | 277 | down_write(&io->io_rwsem); |
93dfe2ac | 278 | |
7a9d7548 | 279 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
04d328de | 280 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags))) |
458e6197 | 281 | __submit_merged_bio(io); |
93dfe2ac JK |
282 | alloc_new: |
283 | if (io->bio == NULL) { | |
90a893c7 | 284 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 285 | |
7a9d7548 CY |
286 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
287 | bio_blocks, is_read); | |
458e6197 | 288 | io->fio = *fio; |
93dfe2ac JK |
289 | } |
290 | ||
4375a336 JK |
291 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
292 | ||
09cbfeaf KS |
293 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < |
294 | PAGE_SIZE) { | |
458e6197 | 295 | __submit_merged_bio(io); |
93dfe2ac JK |
296 | goto alloc_new; |
297 | } | |
298 | ||
7a9d7548 | 299 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 300 | f2fs_trace_ios(fio, 0); |
93dfe2ac | 301 | |
df0f8dc0 | 302 | up_write(&io->io_rwsem); |
05ca3632 | 303 | trace_f2fs_submit_page_mbio(fio->page, fio); |
93dfe2ac JK |
304 | } |
305 | ||
46008c6d CY |
306 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
307 | { | |
308 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
309 | __le32 *addr_array; | |
310 | ||
311 | /* Get physical address of data block */ | |
312 | addr_array = blkaddr_in_node(rn); | |
313 | addr_array[dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); | |
314 | } | |
315 | ||
0a8165d7 | 316 | /* |
eb47b800 JK |
317 | * Lock ordering for the change of data block address: |
318 | * ->data_page | |
319 | * ->node_page | |
320 | * update block addresses in the node page | |
321 | */ | |
216a620a | 322 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 323 | { |
46008c6d CY |
324 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
325 | __set_data_blkaddr(dn); | |
326 | if (set_page_dirty(dn->node_page)) | |
12719ae1 | 327 | dn->node_changed = true; |
eb47b800 JK |
328 | } |
329 | ||
f28b3434 CY |
330 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
331 | { | |
332 | dn->data_blkaddr = blkaddr; | |
333 | set_data_blkaddr(dn); | |
334 | f2fs_update_extent_cache(dn); | |
335 | } | |
336 | ||
46008c6d CY |
337 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
338 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 339 | { |
4081363f | 340 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 341 | |
46008c6d CY |
342 | if (!count) |
343 | return 0; | |
344 | ||
91942321 | 345 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
eb47b800 | 346 | return -EPERM; |
46008c6d | 347 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
eb47b800 JK |
348 | return -ENOSPC; |
349 | ||
46008c6d CY |
350 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
351 | dn->ofs_in_node, count); | |
352 | ||
353 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); | |
354 | ||
355 | for (; count > 0; dn->ofs_in_node++) { | |
356 | block_t blkaddr = | |
357 | datablock_addr(dn->node_page, dn->ofs_in_node); | |
358 | if (blkaddr == NULL_ADDR) { | |
359 | dn->data_blkaddr = NEW_ADDR; | |
360 | __set_data_blkaddr(dn); | |
361 | count--; | |
362 | } | |
363 | } | |
364 | ||
365 | if (set_page_dirty(dn->node_page)) | |
366 | dn->node_changed = true; | |
eb47b800 JK |
367 | return 0; |
368 | } | |
369 | ||
46008c6d CY |
370 | /* Should keep dn->ofs_in_node unchanged */ |
371 | int reserve_new_block(struct dnode_of_data *dn) | |
372 | { | |
373 | unsigned int ofs_in_node = dn->ofs_in_node; | |
374 | int ret; | |
375 | ||
376 | ret = reserve_new_blocks(dn, 1); | |
377 | dn->ofs_in_node = ofs_in_node; | |
378 | return ret; | |
379 | } | |
380 | ||
b600965c HL |
381 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
382 | { | |
383 | bool need_put = dn->inode_page ? false : true; | |
384 | int err; | |
385 | ||
386 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
387 | if (err) | |
388 | return err; | |
a8865372 | 389 | |
b600965c HL |
390 | if (dn->data_blkaddr == NULL_ADDR) |
391 | err = reserve_new_block(dn); | |
a8865372 | 392 | if (err || need_put) |
b600965c HL |
393 | f2fs_put_dnode(dn); |
394 | return err; | |
395 | } | |
396 | ||
759af1c9 | 397 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 398 | { |
028a41e8 | 399 | struct extent_info ei; |
759af1c9 | 400 | struct inode *inode = dn->inode; |
028a41e8 | 401 | |
759af1c9 FL |
402 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
403 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
404 | return 0; | |
429511cd | 405 | } |
028a41e8 | 406 | |
759af1c9 | 407 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
408 | } |
409 | ||
a56c7c6f | 410 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
04d328de | 411 | int op_flags, bool for_write) |
eb47b800 | 412 | { |
eb47b800 JK |
413 | struct address_space *mapping = inode->i_mapping; |
414 | struct dnode_of_data dn; | |
415 | struct page *page; | |
cb3bc9ee | 416 | struct extent_info ei; |
eb47b800 | 417 | int err; |
cf04e8eb | 418 | struct f2fs_io_info fio = { |
05ca3632 | 419 | .sbi = F2FS_I_SB(inode), |
cf04e8eb | 420 | .type = DATA, |
04d328de MC |
421 | .op = REQ_OP_READ, |
422 | .op_flags = op_flags, | |
4375a336 | 423 | .encrypted_page = NULL, |
cf04e8eb | 424 | }; |
eb47b800 | 425 | |
4375a336 JK |
426 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
427 | return read_mapping_page(mapping, index, NULL); | |
428 | ||
a56c7c6f | 429 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
430 | if (!page) |
431 | return ERR_PTR(-ENOMEM); | |
432 | ||
cb3bc9ee CY |
433 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
434 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
435 | goto got_it; | |
436 | } | |
437 | ||
eb47b800 | 438 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 439 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
440 | if (err) |
441 | goto put_err; | |
eb47b800 JK |
442 | f2fs_put_dnode(&dn); |
443 | ||
6bacf52f | 444 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
445 | err = -ENOENT; |
446 | goto put_err; | |
650495de | 447 | } |
cb3bc9ee | 448 | got_it: |
43f3eae1 JK |
449 | if (PageUptodate(page)) { |
450 | unlock_page(page); | |
eb47b800 | 451 | return page; |
43f3eae1 | 452 | } |
eb47b800 | 453 | |
d59ff4df JK |
454 | /* |
455 | * A new dentry page is allocated but not able to be written, since its | |
456 | * new inode page couldn't be allocated due to -ENOSPC. | |
457 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
458 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
459 | */ | |
460 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 461 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
462 | if (!PageUptodate(page)) |
463 | SetPageUptodate(page); | |
43f3eae1 | 464 | unlock_page(page); |
d59ff4df JK |
465 | return page; |
466 | } | |
eb47b800 | 467 | |
7a9d7548 | 468 | fio.new_blkaddr = fio.old_blkaddr = dn.data_blkaddr; |
05ca3632 JK |
469 | fio.page = page; |
470 | err = f2fs_submit_page_bio(&fio); | |
393ff91f | 471 | if (err) |
86531d6b | 472 | goto put_err; |
43f3eae1 | 473 | return page; |
86531d6b JK |
474 | |
475 | put_err: | |
476 | f2fs_put_page(page, 1); | |
477 | return ERR_PTR(err); | |
43f3eae1 JK |
478 | } |
479 | ||
480 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
481 | { | |
482 | struct address_space *mapping = inode->i_mapping; | |
483 | struct page *page; | |
484 | ||
485 | page = find_get_page(mapping, index); | |
486 | if (page && PageUptodate(page)) | |
487 | return page; | |
488 | f2fs_put_page(page, 0); | |
489 | ||
a56c7c6f | 490 | page = get_read_data_page(inode, index, READ_SYNC, false); |
43f3eae1 JK |
491 | if (IS_ERR(page)) |
492 | return page; | |
493 | ||
494 | if (PageUptodate(page)) | |
495 | return page; | |
496 | ||
497 | wait_on_page_locked(page); | |
498 | if (unlikely(!PageUptodate(page))) { | |
499 | f2fs_put_page(page, 0); | |
500 | return ERR_PTR(-EIO); | |
501 | } | |
502 | return page; | |
503 | } | |
504 | ||
505 | /* | |
506 | * If it tries to access a hole, return an error. | |
507 | * Because, the callers, functions in dir.c and GC, should be able to know | |
508 | * whether this page exists or not. | |
509 | */ | |
a56c7c6f JK |
510 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
511 | bool for_write) | |
43f3eae1 JK |
512 | { |
513 | struct address_space *mapping = inode->i_mapping; | |
514 | struct page *page; | |
515 | repeat: | |
a56c7c6f | 516 | page = get_read_data_page(inode, index, READ_SYNC, for_write); |
43f3eae1 JK |
517 | if (IS_ERR(page)) |
518 | return page; | |
393ff91f | 519 | |
43f3eae1 | 520 | /* wait for read completion */ |
393ff91f | 521 | lock_page(page); |
6bacf52f | 522 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
523 | f2fs_put_page(page, 1); |
524 | goto repeat; | |
eb47b800 | 525 | } |
1563ac75 CY |
526 | if (unlikely(!PageUptodate(page))) { |
527 | f2fs_put_page(page, 1); | |
528 | return ERR_PTR(-EIO); | |
529 | } | |
eb47b800 JK |
530 | return page; |
531 | } | |
532 | ||
0a8165d7 | 533 | /* |
eb47b800 JK |
534 | * Caller ensures that this data page is never allocated. |
535 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 536 | * |
4f4124d0 CY |
537 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
538 | * f2fs_unlock_op(). | |
470f00e9 CY |
539 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
540 | * ipage should be released by this function. | |
eb47b800 | 541 | */ |
64aa7ed9 | 542 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 543 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 544 | { |
eb47b800 JK |
545 | struct address_space *mapping = inode->i_mapping; |
546 | struct page *page; | |
547 | struct dnode_of_data dn; | |
548 | int err; | |
7612118a | 549 | |
a56c7c6f | 550 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
551 | if (!page) { |
552 | /* | |
553 | * before exiting, we should make sure ipage will be released | |
554 | * if any error occur. | |
555 | */ | |
556 | f2fs_put_page(ipage, 1); | |
01f28610 | 557 | return ERR_PTR(-ENOMEM); |
470f00e9 | 558 | } |
eb47b800 | 559 | |
a8865372 | 560 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 561 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
562 | if (err) { |
563 | f2fs_put_page(page, 1); | |
eb47b800 | 564 | return ERR_PTR(err); |
a8865372 | 565 | } |
01f28610 JK |
566 | if (!ipage) |
567 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
568 | |
569 | if (PageUptodate(page)) | |
01f28610 | 570 | goto got_it; |
eb47b800 JK |
571 | |
572 | if (dn.data_blkaddr == NEW_ADDR) { | |
09cbfeaf | 573 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
574 | if (!PageUptodate(page)) |
575 | SetPageUptodate(page); | |
eb47b800 | 576 | } else { |
4375a336 | 577 | f2fs_put_page(page, 1); |
a8865372 | 578 | |
7612118a JK |
579 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
580 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
581 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 582 | if (IS_ERR(page)) |
7612118a | 583 | return page; |
eb47b800 | 584 | } |
01f28610 | 585 | got_it: |
9edcdabf | 586 | if (new_i_size && i_size_read(inode) < |
ee6d182f | 587 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
fc9581c8 | 588 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); |
eb47b800 JK |
589 | return page; |
590 | } | |
591 | ||
bfad7c2d JK |
592 | static int __allocate_data_block(struct dnode_of_data *dn) |
593 | { | |
4081363f | 594 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 595 | struct f2fs_summary sum; |
bfad7c2d | 596 | struct node_info ni; |
38aa0889 | 597 | int seg = CURSEG_WARM_DATA; |
976e4c50 | 598 | pgoff_t fofs; |
46008c6d | 599 | blkcnt_t count = 1; |
bfad7c2d | 600 | |
91942321 | 601 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 602 | return -EPERM; |
df6136ef CY |
603 | |
604 | dn->data_blkaddr = datablock_addr(dn->node_page, dn->ofs_in_node); | |
605 | if (dn->data_blkaddr == NEW_ADDR) | |
606 | goto alloc; | |
607 | ||
46008c6d | 608 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, &count))) |
bfad7c2d JK |
609 | return -ENOSPC; |
610 | ||
df6136ef | 611 | alloc: |
bfad7c2d JK |
612 | get_node_info(sbi, dn->nid, &ni); |
613 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
614 | ||
38aa0889 JK |
615 | if (dn->ofs_in_node == 0 && dn->inode_page == dn->node_page) |
616 | seg = CURSEG_DIRECT_IO; | |
617 | ||
df6136ef CY |
618 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
619 | &sum, seg); | |
216a620a | 620 | set_data_blkaddr(dn); |
bfad7c2d | 621 | |
976e4c50 | 622 | /* update i_size */ |
81ca7350 | 623 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 624 | dn->ofs_in_node; |
09cbfeaf | 625 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
fc9581c8 | 626 | f2fs_i_size_write(dn->inode, |
09cbfeaf | 627 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); |
bfad7c2d JK |
628 | return 0; |
629 | } | |
630 | ||
b439b103 | 631 | ssize_t f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 632 | { |
b439b103 | 633 | struct inode *inode = file_inode(iocb->ki_filp); |
5b8db7fa | 634 | struct f2fs_map_blocks map; |
b439b103 | 635 | ssize_t ret = 0; |
59b802e5 | 636 | |
0080c507 | 637 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
dfd02e4d CY |
638 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); |
639 | if (map.m_len > map.m_lblk) | |
640 | map.m_len -= map.m_lblk; | |
641 | else | |
642 | map.m_len = 0; | |
643 | ||
da85985c | 644 | map.m_next_pgofs = NULL; |
2a340760 | 645 | |
24b84912 JK |
646 | if (iocb->ki_flags & IOCB_DIRECT) { |
647 | ret = f2fs_convert_inline_inode(inode); | |
648 | if (ret) | |
649 | return ret; | |
650 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_DIO); | |
651 | } | |
652 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA) { | |
b439b103 JK |
653 | ret = f2fs_convert_inline_inode(inode); |
654 | if (ret) | |
655 | return ret; | |
b439b103 | 656 | } |
24b84912 JK |
657 | if (!f2fs_has_inline_data(inode)) |
658 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
b439b103 | 659 | return ret; |
59b802e5 JK |
660 | } |
661 | ||
0a8165d7 | 662 | /* |
003a3e1d JK |
663 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
664 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
665 | * If original data blocks are allocated, then give them to blockdev. |
666 | * Otherwise, | |
667 | * a. preallocate requested block addresses | |
668 | * b. do not use extent cache for better performance | |
669 | * c. give the block addresses to blockdev | |
eb47b800 | 670 | */ |
d323d005 | 671 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 672 | int create, int flag) |
eb47b800 | 673 | { |
003a3e1d | 674 | unsigned int maxblocks = map->m_len; |
eb47b800 | 675 | struct dnode_of_data dn; |
f9811703 | 676 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
ac6f1999 | 677 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
46008c6d | 678 | pgoff_t pgofs, end_offset, end; |
bfad7c2d | 679 | int err = 0, ofs = 1; |
46008c6d CY |
680 | unsigned int ofs_in_node, last_ofs_in_node; |
681 | blkcnt_t prealloc; | |
a2e7d1bf | 682 | struct extent_info ei; |
bfad7c2d | 683 | bool allocated = false; |
7df3a431 | 684 | block_t blkaddr; |
eb47b800 | 685 | |
dfd02e4d CY |
686 | if (!maxblocks) |
687 | return 0; | |
688 | ||
003a3e1d JK |
689 | map->m_len = 0; |
690 | map->m_flags = 0; | |
691 | ||
692 | /* it only supports block size == page size */ | |
693 | pgofs = (pgoff_t)map->m_lblk; | |
46008c6d | 694 | end = pgofs + maxblocks; |
eb47b800 | 695 | |
24b84912 | 696 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
697 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
698 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
699 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 700 | goto out; |
a2e7d1bf | 701 | } |
bfad7c2d | 702 | |
4fe71e88 | 703 | next_dnode: |
59b802e5 | 704 | if (create) |
3104af35 | 705 | f2fs_lock_op(sbi); |
eb47b800 JK |
706 | |
707 | /* When reading holes, we need its node page */ | |
708 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 709 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 710 | if (err) { |
43473f96 CY |
711 | if (flag == F2FS_GET_BLOCK_BMAP) |
712 | map->m_pblk = 0; | |
da85985c | 713 | if (err == -ENOENT) { |
bfad7c2d | 714 | err = 0; |
da85985c CY |
715 | if (map->m_next_pgofs) |
716 | *map->m_next_pgofs = | |
717 | get_next_page_offset(&dn, pgofs); | |
718 | } | |
bfad7c2d | 719 | goto unlock_out; |
848753aa | 720 | } |
973163fc | 721 | |
46008c6d | 722 | prealloc = 0; |
a299abd2 | 723 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
81ca7350 | 724 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
4fe71e88 CY |
725 | |
726 | next_block: | |
727 | blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
728 | ||
aafb3715 CY |
729 | if (__is_valid_data_blkaddr(blkaddr) && |
730 | !f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) { | |
731 | err = -EFAULT; | |
732 | goto sync_out; | |
733 | } | |
734 | ||
d4511881 | 735 | if (!is_valid_data_blkaddr(sbi, blkaddr)) { |
973163fc | 736 | if (create) { |
f9811703 CY |
737 | if (unlikely(f2fs_cp_error(sbi))) { |
738 | err = -EIO; | |
4fe71e88 | 739 | goto sync_out; |
f9811703 | 740 | } |
24b84912 | 741 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { |
46008c6d CY |
742 | if (blkaddr == NULL_ADDR) { |
743 | prealloc++; | |
744 | last_ofs_in_node = dn.ofs_in_node; | |
745 | } | |
24b84912 JK |
746 | } else { |
747 | err = __allocate_data_block(&dn); | |
46008c6d | 748 | if (!err) { |
91942321 | 749 | set_inode_flag(inode, FI_APPEND_WRITE); |
46008c6d CY |
750 | allocated = true; |
751 | } | |
24b84912 | 752 | } |
973163fc | 753 | if (err) |
4fe71e88 | 754 | goto sync_out; |
973163fc | 755 | map->m_flags = F2FS_MAP_NEW; |
4fe71e88 | 756 | blkaddr = dn.data_blkaddr; |
973163fc | 757 | } else { |
43473f96 CY |
758 | if (flag == F2FS_GET_BLOCK_BMAP) { |
759 | map->m_pblk = 0; | |
760 | goto sync_out; | |
761 | } | |
da85985c CY |
762 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
763 | blkaddr == NULL_ADDR) { | |
764 | if (map->m_next_pgofs) | |
765 | *map->m_next_pgofs = pgofs + 1; | |
766 | } | |
973163fc | 767 | if (flag != F2FS_GET_BLOCK_FIEMAP || |
43473f96 | 768 | blkaddr != NEW_ADDR) |
4fe71e88 | 769 | goto sync_out; |
e2b4e2bc | 770 | } |
e2b4e2bc | 771 | } |
eb47b800 | 772 | |
46008c6d CY |
773 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
774 | goto skip; | |
775 | ||
4fe71e88 CY |
776 | if (map->m_len == 0) { |
777 | /* preallocated unwritten block should be mapped for fiemap. */ | |
778 | if (blkaddr == NEW_ADDR) | |
779 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
780 | map->m_flags |= F2FS_MAP_MAPPED; | |
781 | ||
782 | map->m_pblk = blkaddr; | |
783 | map->m_len = 1; | |
784 | } else if ((map->m_pblk != NEW_ADDR && | |
785 | blkaddr == (map->m_pblk + ofs)) || | |
b439b103 | 786 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || |
46008c6d | 787 | flag == F2FS_GET_BLOCK_PRE_DIO) { |
4fe71e88 CY |
788 | ofs++; |
789 | map->m_len++; | |
790 | } else { | |
791 | goto sync_out; | |
792 | } | |
bfad7c2d | 793 | |
46008c6d | 794 | skip: |
bfad7c2d JK |
795 | dn.ofs_in_node++; |
796 | pgofs++; | |
797 | ||
46008c6d CY |
798 | /* preallocate blocks in batch for one dnode page */ |
799 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
800 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
7df3a431 | 801 | |
46008c6d CY |
802 | dn.ofs_in_node = ofs_in_node; |
803 | err = reserve_new_blocks(&dn, prealloc); | |
804 | if (err) | |
805 | goto sync_out; | |
58383bef | 806 | allocated = dn.node_changed; |
bfad7c2d | 807 | |
46008c6d CY |
808 | map->m_len += dn.ofs_in_node - ofs_in_node; |
809 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
810 | err = -ENOSPC; | |
811 | goto sync_out; | |
3104af35 | 812 | } |
46008c6d CY |
813 | dn.ofs_in_node = end_offset; |
814 | } | |
815 | ||
816 | if (pgofs >= end) | |
817 | goto sync_out; | |
818 | else if (dn.ofs_in_node < end_offset) | |
819 | goto next_block; | |
820 | ||
46008c6d CY |
821 | f2fs_put_dnode(&dn); |
822 | ||
823 | if (create) { | |
824 | f2fs_unlock_op(sbi); | |
825 | f2fs_balance_fs(sbi, allocated); | |
eb47b800 | 826 | } |
46008c6d CY |
827 | allocated = false; |
828 | goto next_dnode; | |
7df3a431 | 829 | |
bfad7c2d | 830 | sync_out: |
eb47b800 | 831 | f2fs_put_dnode(&dn); |
bfad7c2d | 832 | unlock_out: |
2a340760 | 833 | if (create) { |
3104af35 | 834 | f2fs_unlock_op(sbi); |
3c082b7b | 835 | f2fs_balance_fs(sbi, allocated); |
2a340760 | 836 | } |
bfad7c2d | 837 | out: |
003a3e1d | 838 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 839 | return err; |
eb47b800 JK |
840 | } |
841 | ||
003a3e1d | 842 | static int __get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
843 | struct buffer_head *bh, int create, int flag, |
844 | pgoff_t *next_pgofs) | |
003a3e1d JK |
845 | { |
846 | struct f2fs_map_blocks map; | |
847 | int ret; | |
848 | ||
849 | map.m_lblk = iblock; | |
850 | map.m_len = bh->b_size >> inode->i_blkbits; | |
da85985c | 851 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 852 | |
e2b4e2bc | 853 | ret = f2fs_map_blocks(inode, &map, create, flag); |
003a3e1d JK |
854 | if (!ret) { |
855 | map_bh(bh, inode->i_sb, map.m_pblk); | |
856 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
b8bf4b88 | 857 | bh->b_size = (u64)map.m_len << inode->i_blkbits; |
003a3e1d JK |
858 | } |
859 | return ret; | |
860 | } | |
861 | ||
ccfb3000 | 862 | static int get_data_block(struct inode *inode, sector_t iblock, |
da85985c CY |
863 | struct buffer_head *bh_result, int create, int flag, |
864 | pgoff_t *next_pgofs) | |
e2b4e2bc | 865 | { |
da85985c CY |
866 | return __get_data_block(inode, iblock, bh_result, create, |
867 | flag, next_pgofs); | |
e2b4e2bc CY |
868 | } |
869 | ||
870 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
871 | struct buffer_head *bh_result, int create) |
872 | { | |
e2b4e2bc | 873 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 874 | F2FS_GET_BLOCK_DIO, NULL); |
ccfb3000 JK |
875 | } |
876 | ||
e2b4e2bc | 877 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
878 | struct buffer_head *bh_result, int create) |
879 | { | |
179448bf | 880 | /* Block number less than F2FS MAX BLOCKS */ |
e0afc4d6 | 881 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) |
179448bf YH |
882 | return -EFBIG; |
883 | ||
e2b4e2bc | 884 | return __get_data_block(inode, iblock, bh_result, create, |
da85985c | 885 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
886 | } |
887 | ||
7f63eb77 JK |
888 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
889 | { | |
890 | return (offset >> inode->i_blkbits); | |
891 | } | |
892 | ||
893 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
894 | { | |
895 | return (blk << inode->i_blkbits); | |
896 | } | |
897 | ||
9ab70134 JK |
898 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
899 | u64 start, u64 len) | |
900 | { | |
7f63eb77 JK |
901 | struct buffer_head map_bh; |
902 | sector_t start_blk, last_blk; | |
da85985c | 903 | pgoff_t next_pgofs; |
de1475cc | 904 | loff_t isize; |
7f63eb77 JK |
905 | u64 logical = 0, phys = 0, size = 0; |
906 | u32 flags = 0; | |
7f63eb77 JK |
907 | int ret = 0; |
908 | ||
909 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
910 | if (ret) | |
911 | return ret; | |
912 | ||
67f8cf3c JK |
913 | if (f2fs_has_inline_data(inode)) { |
914 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
915 | if (ret != -EAGAIN) | |
916 | return ret; | |
917 | } | |
918 | ||
5955102c | 919 | inode_lock(inode); |
de1475cc FL |
920 | |
921 | isize = i_size_read(inode); | |
9a950d52 FL |
922 | if (start >= isize) |
923 | goto out; | |
7f63eb77 | 924 | |
9a950d52 FL |
925 | if (start + len > isize) |
926 | len = isize - start; | |
7f63eb77 JK |
927 | |
928 | if (logical_to_blk(inode, len) == 0) | |
929 | len = blk_to_logical(inode, 1); | |
930 | ||
931 | start_blk = logical_to_blk(inode, start); | |
932 | last_blk = logical_to_blk(inode, start + len - 1); | |
9a950d52 | 933 | |
7f63eb77 JK |
934 | next: |
935 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
936 | map_bh.b_size = len; | |
937 | ||
e2b4e2bc | 938 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
da85985c | 939 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
940 | if (ret) |
941 | goto out; | |
942 | ||
943 | /* HOLE */ | |
944 | if (!buffer_mapped(&map_bh)) { | |
da85985c | 945 | start_blk = next_pgofs; |
9a950d52 | 946 | /* Go through holes util pass the EOF */ |
da85985c | 947 | if (blk_to_logical(inode, start_blk) < isize) |
9a950d52 FL |
948 | goto prep_next; |
949 | /* Found a hole beyond isize means no more extents. | |
950 | * Note that the premise is that filesystems don't | |
951 | * punch holes beyond isize and keep size unchanged. | |
952 | */ | |
953 | flags |= FIEMAP_EXTENT_LAST; | |
954 | } | |
7f63eb77 | 955 | |
da5af127 CY |
956 | if (size) { |
957 | if (f2fs_encrypted_inode(inode)) | |
958 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
959 | ||
9a950d52 FL |
960 | ret = fiemap_fill_next_extent(fieinfo, logical, |
961 | phys, size, flags); | |
da5af127 | 962 | } |
7f63eb77 | 963 | |
9a950d52 FL |
964 | if (start_blk > last_blk || ret) |
965 | goto out; | |
7f63eb77 | 966 | |
9a950d52 FL |
967 | logical = blk_to_logical(inode, start_blk); |
968 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
969 | size = map_bh.b_size; | |
970 | flags = 0; | |
971 | if (buffer_unwritten(&map_bh)) | |
972 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 973 | |
9a950d52 | 974 | start_blk += logical_to_blk(inode, size); |
7f63eb77 | 975 | |
9a950d52 | 976 | prep_next: |
7f63eb77 JK |
977 | cond_resched(); |
978 | if (fatal_signal_pending(current)) | |
979 | ret = -EINTR; | |
980 | else | |
981 | goto next; | |
982 | out: | |
983 | if (ret == 1) | |
984 | ret = 0; | |
985 | ||
5955102c | 986 | inode_unlock(inode); |
7f63eb77 | 987 | return ret; |
9ab70134 JK |
988 | } |
989 | ||
6a7a3aed WY |
990 | static struct bio *f2fs_grab_bio(struct inode *inode, block_t blkaddr, |
991 | unsigned nr_pages) | |
78682f79 CY |
992 | { |
993 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
994 | struct fscrypt_ctx *ctx = NULL; | |
995 | struct block_device *bdev = sbi->sb->s_bdev; | |
996 | struct bio *bio; | |
997 | ||
b10a6ac2 CY |
998 | if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) |
999 | return ERR_PTR(-EFAULT); | |
1000 | ||
78682f79 CY |
1001 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
1002 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
1003 | if (IS_ERR(ctx)) | |
1004 | return ERR_CAST(ctx); | |
1005 | ||
1006 | /* wait the page to be moved by cleaning */ | |
1007 | f2fs_wait_on_encrypted_page_writeback(sbi, blkaddr); | |
1008 | } | |
1009 | ||
1010 | bio = bio_alloc(GFP_KERNEL, min_t(int, nr_pages, BIO_MAX_PAGES)); | |
1011 | if (!bio) { | |
1012 | if (ctx) | |
1013 | fscrypt_release_ctx(ctx); | |
1014 | return ERR_PTR(-ENOMEM); | |
1015 | } | |
1016 | bio->bi_bdev = bdev; | |
1017 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blkaddr); | |
1018 | bio->bi_end_io = f2fs_read_end_io; | |
1019 | bio->bi_private = ctx; | |
1020 | ||
1021 | return bio; | |
1022 | } | |
1023 | ||
f1e88660 JK |
1024 | /* |
1025 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1026 | * Major change was from block_size == page_size in f2fs by default. | |
1027 | */ | |
1028 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1029 | struct list_head *pages, struct page *page, | |
1030 | unsigned nr_pages) | |
1031 | { | |
1032 | struct bio *bio = NULL; | |
1033 | unsigned page_idx; | |
1034 | sector_t last_block_in_bio = 0; | |
1035 | struct inode *inode = mapping->host; | |
1036 | const unsigned blkbits = inode->i_blkbits; | |
1037 | const unsigned blocksize = 1 << blkbits; | |
1038 | sector_t block_in_file; | |
1039 | sector_t last_block; | |
1040 | sector_t last_block_in_file; | |
1041 | sector_t block_nr; | |
f1e88660 JK |
1042 | struct f2fs_map_blocks map; |
1043 | ||
1044 | map.m_pblk = 0; | |
1045 | map.m_lblk = 0; | |
1046 | map.m_len = 0; | |
1047 | map.m_flags = 0; | |
da85985c | 1048 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1049 | |
1050 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1051 | ||
1052 | prefetchw(&page->flags); | |
1053 | if (pages) { | |
1054 | page = list_entry(pages->prev, struct page, lru); | |
1055 | list_del(&page->lru); | |
1056 | if (add_to_page_cache_lru(page, mapping, | |
8a5c743e MH |
1057 | page->index, |
1058 | readahead_gfp_mask(mapping))) | |
f1e88660 JK |
1059 | goto next_page; |
1060 | } | |
1061 | ||
1062 | block_in_file = (sector_t)page->index; | |
1063 | last_block = block_in_file + nr_pages; | |
1064 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1065 | blkbits; | |
1066 | if (last_block > last_block_in_file) | |
1067 | last_block = last_block_in_file; | |
1068 | ||
1069 | /* | |
1070 | * Map blocks using the previous result first. | |
1071 | */ | |
1072 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1073 | block_in_file > map.m_lblk && | |
1074 | block_in_file < (map.m_lblk + map.m_len)) | |
1075 | goto got_it; | |
1076 | ||
1077 | /* | |
1078 | * Then do more f2fs_map_blocks() calls until we are | |
1079 | * done with this page. | |
1080 | */ | |
1081 | map.m_flags = 0; | |
1082 | ||
1083 | if (block_in_file < last_block) { | |
1084 | map.m_lblk = block_in_file; | |
1085 | map.m_len = last_block - block_in_file; | |
1086 | ||
46c9e141 | 1087 | if (f2fs_map_blocks(inode, &map, 0, |
da85985c | 1088 | F2FS_GET_BLOCK_READ)) |
f1e88660 JK |
1089 | goto set_error_page; |
1090 | } | |
1091 | got_it: | |
1092 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1093 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1094 | SetPageMappedToDisk(page); | |
1095 | ||
1096 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1097 | SetPageUptodate(page); | |
1098 | goto confused; | |
1099 | } | |
aafb3715 CY |
1100 | |
1101 | if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr, | |
1102 | DATA_GENERIC)) | |
1103 | goto set_error_page; | |
f1e88660 | 1104 | } else { |
09cbfeaf | 1105 | zero_user_segment(page, 0, PAGE_SIZE); |
237c0790 JK |
1106 | if (!PageUptodate(page)) |
1107 | SetPageUptodate(page); | |
f1e88660 JK |
1108 | unlock_page(page); |
1109 | goto next_page; | |
1110 | } | |
1111 | ||
1112 | /* | |
1113 | * This page will go to BIO. Do we need to send this | |
1114 | * BIO off first? | |
1115 | */ | |
1116 | if (bio && (last_block_in_bio != block_nr - 1)) { | |
1117 | submit_and_realloc: | |
4fc29c1a | 1118 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1119 | bio = NULL; |
1120 | } | |
1121 | if (bio == NULL) { | |
78682f79 | 1122 | bio = f2fs_grab_bio(inode, block_nr, nr_pages); |
1d353eb7 JK |
1123 | if (IS_ERR(bio)) { |
1124 | bio = NULL; | |
f1e88660 | 1125 | goto set_error_page; |
4375a336 | 1126 | } |
04d328de | 1127 | bio_set_op_attrs(bio, REQ_OP_READ, 0); |
f1e88660 JK |
1128 | } |
1129 | ||
1130 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1131 | goto submit_and_realloc; | |
1132 | ||
1133 | last_block_in_bio = block_nr; | |
1134 | goto next_page; | |
1135 | set_error_page: | |
1136 | SetPageError(page); | |
09cbfeaf | 1137 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1138 | unlock_page(page); |
1139 | goto next_page; | |
1140 | confused: | |
1141 | if (bio) { | |
4fc29c1a | 1142 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1143 | bio = NULL; |
1144 | } | |
1145 | unlock_page(page); | |
1146 | next_page: | |
1147 | if (pages) | |
09cbfeaf | 1148 | put_page(page); |
f1e88660 JK |
1149 | } |
1150 | BUG_ON(pages && !list_empty(pages)); | |
1151 | if (bio) | |
4fc29c1a | 1152 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1153 | return 0; |
1154 | } | |
1155 | ||
eb47b800 JK |
1156 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1157 | { | |
9ffe0fb5 | 1158 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1159 | int ret = -EAGAIN; |
9ffe0fb5 | 1160 | |
c20e89cd CY |
1161 | trace_f2fs_readpage(page, DATA); |
1162 | ||
e1c42045 | 1163 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1164 | if (f2fs_has_inline_data(inode)) |
1165 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1166 | if (ret == -EAGAIN) |
f1e88660 | 1167 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1168 | return ret; |
eb47b800 JK |
1169 | } |
1170 | ||
1171 | static int f2fs_read_data_pages(struct file *file, | |
1172 | struct address_space *mapping, | |
1173 | struct list_head *pages, unsigned nr_pages) | |
1174 | { | |
9ffe0fb5 | 1175 | struct inode *inode = file->f_mapping->host; |
b8c29400 CY |
1176 | struct page *page = list_entry(pages->prev, struct page, lru); |
1177 | ||
1178 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1179 | |
1180 | /* If the file has inline data, skip readpages */ | |
1181 | if (f2fs_has_inline_data(inode)) | |
1182 | return 0; | |
1183 | ||
f1e88660 | 1184 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1185 | } |
1186 | ||
05ca3632 | 1187 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1188 | { |
05ca3632 | 1189 | struct page *page = fio->page; |
eb47b800 | 1190 | struct inode *inode = page->mapping->host; |
eb47b800 JK |
1191 | struct dnode_of_data dn; |
1192 | int err = 0; | |
1193 | ||
1194 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 1195 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
1196 | if (err) |
1197 | return err; | |
1198 | ||
28bc106b | 1199 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1200 | |
1201 | /* This page is already truncated */ | |
7a9d7548 | 1202 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1203 | ClearPageUptodate(page); |
eb47b800 | 1204 | goto out_writepage; |
2bca1e23 | 1205 | } |
eb47b800 | 1206 | |
4375a336 | 1207 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) { |
b32e4482 | 1208 | gfp_t gfp_flags = GFP_NOFS; |
08b39fbd CY |
1209 | |
1210 | /* wait for GCed encrypted page writeback */ | |
1211 | f2fs_wait_on_encrypted_page_writeback(F2FS_I_SB(inode), | |
7a9d7548 | 1212 | fio->old_blkaddr); |
b32e4482 JK |
1213 | retry_encrypt: |
1214 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1215 | gfp_flags); | |
4375a336 JK |
1216 | if (IS_ERR(fio->encrypted_page)) { |
1217 | err = PTR_ERR(fio->encrypted_page); | |
b32e4482 JK |
1218 | if (err == -ENOMEM) { |
1219 | /* flush pending ios and wait for a while */ | |
1220 | f2fs_flush_merged_bios(F2FS_I_SB(inode)); | |
1221 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1222 | gfp_flags |= __GFP_NOFAIL; | |
1223 | err = 0; | |
1224 | goto retry_encrypt; | |
1225 | } | |
4375a336 JK |
1226 | goto out_writepage; |
1227 | } | |
1228 | } | |
1229 | ||
eb47b800 JK |
1230 | set_page_writeback(page); |
1231 | ||
aafb3715 CY |
1232 | if (__is_valid_data_blkaddr(fio->old_blkaddr) && |
1233 | !f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr, | |
1234 | DATA_GENERIC)) { | |
1235 | err = -EFAULT; | |
1236 | goto out_writepage; | |
1237 | } | |
eb47b800 JK |
1238 | /* |
1239 | * If current allocation needs SSR, | |
1240 | * it had better in-place writes for updated data. | |
1241 | */ | |
d4511881 | 1242 | if (unlikely(is_valid_data_blkaddr(fio->sbi, fio->old_blkaddr) && |
b25958b6 | 1243 | !is_cold_data(page) && |
2da3e027 | 1244 | !IS_ATOMIC_WRITTEN_PAGE(page) && |
b25958b6 | 1245 | need_inplace_update(inode))) { |
05ca3632 | 1246 | rewrite_data_page(fio); |
91942321 | 1247 | set_inode_flag(inode, FI_UPDATE_WRITE); |
8ce67cb0 | 1248 | trace_f2fs_do_write_data_page(page, IPU); |
eb47b800 | 1249 | } else { |
05ca3632 | 1250 | write_data_page(&dn, fio); |
8ce67cb0 | 1251 | trace_f2fs_do_write_data_page(page, OPU); |
91942321 | 1252 | set_inode_flag(inode, FI_APPEND_WRITE); |
3c6c2beb | 1253 | if (page->index == 0) |
91942321 | 1254 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); |
eb47b800 JK |
1255 | } |
1256 | out_writepage: | |
1257 | f2fs_put_dnode(&dn); | |
1258 | return err; | |
1259 | } | |
1260 | ||
1261 | static int f2fs_write_data_page(struct page *page, | |
1262 | struct writeback_control *wbc) | |
1263 | { | |
1264 | struct inode *inode = page->mapping->host; | |
4081363f | 1265 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1266 | loff_t i_size = i_size_read(inode); |
1267 | const pgoff_t end_index = ((unsigned long long) i_size) | |
09cbfeaf | 1268 | >> PAGE_SHIFT; |
26de9b11 | 1269 | loff_t psize = (page->index + 1) << PAGE_SHIFT; |
9ffe0fb5 | 1270 | unsigned offset = 0; |
39936837 | 1271 | bool need_balance_fs = false; |
eb47b800 | 1272 | int err = 0; |
458e6197 | 1273 | struct f2fs_io_info fio = { |
05ca3632 | 1274 | .sbi = sbi, |
458e6197 | 1275 | .type = DATA, |
04d328de MC |
1276 | .op = REQ_OP_WRITE, |
1277 | .op_flags = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : 0, | |
05ca3632 | 1278 | .page = page, |
4375a336 | 1279 | .encrypted_page = NULL, |
458e6197 | 1280 | }; |
eb47b800 | 1281 | |
ecda0de3 CY |
1282 | trace_f2fs_writepage(page, DATA); |
1283 | ||
eb47b800 | 1284 | if (page->index < end_index) |
39936837 | 1285 | goto write; |
eb47b800 JK |
1286 | |
1287 | /* | |
1288 | * If the offset is out-of-range of file size, | |
1289 | * this page does not have to be written to disk. | |
1290 | */ | |
09cbfeaf | 1291 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1292 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1293 | goto out; |
eb47b800 | 1294 | |
09cbfeaf | 1295 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1296 | write: |
caf0047e | 1297 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
eb47b800 | 1298 | goto redirty_out; |
1e84371f JK |
1299 | if (f2fs_is_drop_cache(inode)) |
1300 | goto out; | |
e6e5f561 JK |
1301 | /* we should not write 0'th page having journal header */ |
1302 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1303 | (!wbc->for_reclaim && | |
1304 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1305 | goto redirty_out; |
eb47b800 | 1306 | |
cf779cab JK |
1307 | /* we should bypass data pages to proceed the kworkder jobs */ |
1308 | if (unlikely(f2fs_cp_error(sbi))) { | |
7f319975 | 1309 | mapping_set_error(page->mapping, -EIO); |
a7ffdbe2 | 1310 | goto out; |
cf779cab JK |
1311 | } |
1312 | ||
39936837 | 1313 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1314 | if (S_ISDIR(inode->i_mode)) { |
05ca3632 | 1315 | err = do_write_data_page(&fio); |
8618b881 JK |
1316 | goto done; |
1317 | } | |
9ffe0fb5 | 1318 | |
8618b881 | 1319 | if (!wbc->for_reclaim) |
39936837 | 1320 | need_balance_fs = true; |
7f3037a5 | 1321 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1322 | goto redirty_out; |
eb47b800 | 1323 | |
b3d208f9 | 1324 | err = -EAGAIN; |
8618b881 | 1325 | f2fs_lock_op(sbi); |
b3d208f9 JK |
1326 | if (f2fs_has_inline_data(inode)) |
1327 | err = f2fs_write_inline_data(inode, page); | |
1328 | if (err == -EAGAIN) | |
05ca3632 | 1329 | err = do_write_data_page(&fio); |
26de9b11 JK |
1330 | if (F2FS_I(inode)->last_disk_size < psize) |
1331 | F2FS_I(inode)->last_disk_size = psize; | |
8618b881 JK |
1332 | f2fs_unlock_op(sbi); |
1333 | done: | |
1334 | if (err && err != -ENOENT) | |
1335 | goto redirty_out; | |
eb47b800 | 1336 | |
eb47b800 | 1337 | clear_cold_data(page); |
39936837 | 1338 | out: |
a7ffdbe2 | 1339 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1340 | if (err) |
1341 | ClearPageUptodate(page); | |
0c3a5797 CY |
1342 | |
1343 | if (wbc->for_reclaim) { | |
1344 | f2fs_submit_merged_bio_cond(sbi, NULL, page, 0, DATA, WRITE); | |
1345 | remove_dirty_inode(inode); | |
1346 | } | |
1347 | ||
eb47b800 | 1348 | unlock_page(page); |
2c4db1a6 | 1349 | f2fs_balance_fs(sbi, need_balance_fs); |
0c3a5797 CY |
1350 | |
1351 | if (unlikely(f2fs_cp_error(sbi))) | |
2aea39ec | 1352 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
0c3a5797 | 1353 | |
eb47b800 JK |
1354 | return 0; |
1355 | ||
eb47b800 | 1356 | redirty_out: |
76f60268 | 1357 | redirty_page_for_writepage(wbc, page); |
b230e6ca JK |
1358 | unlock_page(page); |
1359 | return err; | |
fa9150a8 NJ |
1360 | } |
1361 | ||
8f46dcae CY |
1362 | /* |
1363 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1364 | * The major change is making write step of cold data page separately from | |
1365 | * warm/hot data page. | |
1366 | */ | |
1367 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
b230e6ca | 1368 | struct writeback_control *wbc) |
8f46dcae CY |
1369 | { |
1370 | int ret = 0; | |
1371 | int done = 0; | |
1372 | struct pagevec pvec; | |
1373 | int nr_pages; | |
1374 | pgoff_t uninitialized_var(writeback_index); | |
1375 | pgoff_t index; | |
1376 | pgoff_t end; /* Inclusive */ | |
1377 | pgoff_t done_index; | |
1378 | int cycled; | |
1379 | int range_whole = 0; | |
1380 | int tag; | |
6ca56ca4 | 1381 | int nwritten = 0; |
8f46dcae CY |
1382 | |
1383 | pagevec_init(&pvec, 0); | |
46ae957f | 1384 | |
8f46dcae CY |
1385 | if (wbc->range_cyclic) { |
1386 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1387 | index = writeback_index; | |
1388 | if (index == 0) | |
1389 | cycled = 1; | |
1390 | else | |
1391 | cycled = 0; | |
1392 | end = -1; | |
1393 | } else { | |
09cbfeaf KS |
1394 | index = wbc->range_start >> PAGE_SHIFT; |
1395 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1396 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1397 | range_whole = 1; | |
1398 | cycled = 1; /* ignore range_cyclic tests */ | |
1399 | } | |
1400 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1401 | tag = PAGECACHE_TAG_TOWRITE; | |
1402 | else | |
1403 | tag = PAGECACHE_TAG_DIRTY; | |
1404 | retry: | |
1405 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1406 | tag_pages_for_writeback(mapping, index, end); | |
1407 | done_index = index; | |
1408 | while (!done && (index <= end)) { | |
1409 | int i; | |
1410 | ||
1411 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1412 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1413 | if (nr_pages == 0) | |
1414 | break; | |
1415 | ||
1416 | for (i = 0; i < nr_pages; i++) { | |
1417 | struct page *page = pvec.pages[i]; | |
1418 | ||
1419 | if (page->index > end) { | |
1420 | done = 1; | |
1421 | break; | |
1422 | } | |
1423 | ||
1424 | done_index = page->index; | |
1425 | ||
1426 | lock_page(page); | |
1427 | ||
1428 | if (unlikely(page->mapping != mapping)) { | |
1429 | continue_unlock: | |
1430 | unlock_page(page); | |
1431 | continue; | |
1432 | } | |
1433 | ||
1434 | if (!PageDirty(page)) { | |
1435 | /* someone wrote it for us */ | |
1436 | goto continue_unlock; | |
1437 | } | |
1438 | ||
8f46dcae CY |
1439 | if (PageWriteback(page)) { |
1440 | if (wbc->sync_mode != WB_SYNC_NONE) | |
fec1d657 JK |
1441 | f2fs_wait_on_page_writeback(page, |
1442 | DATA, true); | |
8f46dcae CY |
1443 | else |
1444 | goto continue_unlock; | |
1445 | } | |
1446 | ||
1447 | BUG_ON(PageWriteback(page)); | |
1448 | if (!clear_page_dirty_for_io(page)) | |
1449 | goto continue_unlock; | |
1450 | ||
b230e6ca | 1451 | ret = mapping->a_ops->writepage(page, wbc); |
8f46dcae | 1452 | if (unlikely(ret)) { |
b230e6ca JK |
1453 | done_index = page->index + 1; |
1454 | done = 1; | |
1455 | break; | |
6ca56ca4 CY |
1456 | } else { |
1457 | nwritten++; | |
8f46dcae CY |
1458 | } |
1459 | ||
1460 | if (--wbc->nr_to_write <= 0 && | |
1461 | wbc->sync_mode == WB_SYNC_NONE) { | |
1462 | done = 1; | |
1463 | break; | |
1464 | } | |
1465 | } | |
1466 | pagevec_release(&pvec); | |
1467 | cond_resched(); | |
1468 | } | |
1469 | ||
8f46dcae CY |
1470 | if (!cycled && !done) { |
1471 | cycled = 1; | |
1472 | index = 0; | |
1473 | end = writeback_index - 1; | |
1474 | goto retry; | |
1475 | } | |
1476 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1477 | mapping->writeback_index = done_index; | |
1478 | ||
6ca56ca4 CY |
1479 | if (nwritten) |
1480 | f2fs_submit_merged_bio_cond(F2FS_M_SB(mapping), mapping->host, | |
1481 | NULL, 0, DATA, WRITE); | |
1482 | ||
8f46dcae CY |
1483 | return ret; |
1484 | } | |
1485 | ||
25ca923b | 1486 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
1487 | struct writeback_control *wbc) |
1488 | { | |
1489 | struct inode *inode = mapping->host; | |
4081363f | 1490 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9dfa1baf | 1491 | struct blk_plug plug; |
eb47b800 | 1492 | int ret; |
eb47b800 | 1493 | |
cfb185a1 | 1494 | /* deal with chardevs and other special file */ |
1495 | if (!mapping->a_ops->writepage) | |
1496 | return 0; | |
1497 | ||
6a290544 CY |
1498 | /* skip writing if there is no dirty page in this inode */ |
1499 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1500 | return 0; | |
1501 | ||
a1257023 JK |
1502 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1503 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1504 | available_free_memory(sbi, DIRTY_DENTS)) | |
1505 | goto skip_write; | |
1506 | ||
d323d005 | 1507 | /* skip writing during file defragment */ |
91942321 | 1508 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) |
d323d005 CY |
1509 | goto skip_write; |
1510 | ||
d5669f7b JK |
1511 | /* during POR, we don't need to trigger writepage at all. */ |
1512 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1513 | goto skip_write; | |
1514 | ||
d31c7c3f YH |
1515 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
1516 | ||
9dfa1baf | 1517 | blk_start_plug(&plug); |
b230e6ca | 1518 | ret = f2fs_write_cache_pages(mapping, wbc); |
9dfa1baf | 1519 | blk_finish_plug(&plug); |
28ea6162 JK |
1520 | /* |
1521 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1522 | * to detect pending bios. | |
1523 | */ | |
458e6197 | 1524 | |
c227f912 | 1525 | remove_dirty_inode(inode); |
eb47b800 | 1526 | return ret; |
d3baf95d JK |
1527 | |
1528 | skip_write: | |
a7ffdbe2 | 1529 | wbc->pages_skipped += get_dirty_pages(inode); |
d31c7c3f | 1530 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1531 | return 0; |
eb47b800 JK |
1532 | } |
1533 | ||
3aab8f82 CY |
1534 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1535 | { | |
1536 | struct inode *inode = mapping->host; | |
819d9153 | 1537 | loff_t i_size = i_size_read(inode); |
3aab8f82 | 1538 | |
819d9153 JK |
1539 | if (to > i_size) { |
1540 | truncate_pagecache(inode, i_size); | |
1541 | truncate_blocks(inode, i_size, true); | |
3aab8f82 CY |
1542 | } |
1543 | } | |
1544 | ||
2aadac08 JK |
1545 | static int prepare_write_begin(struct f2fs_sb_info *sbi, |
1546 | struct page *page, loff_t pos, unsigned len, | |
1547 | block_t *blk_addr, bool *node_changed) | |
1548 | { | |
1549 | struct inode *inode = page->mapping->host; | |
1550 | pgoff_t index = page->index; | |
1551 | struct dnode_of_data dn; | |
1552 | struct page *ipage; | |
b4d07a3e JK |
1553 | bool locked = false; |
1554 | struct extent_info ei; | |
2aadac08 JK |
1555 | int err = 0; |
1556 | ||
24b84912 JK |
1557 | /* |
1558 | * we already allocated all the blocks, so we don't need to get | |
1559 | * the block addresses when there is no need to fill the page. | |
1560 | */ | |
5d4c0af4 | 1561 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE) |
24b84912 JK |
1562 | return 0; |
1563 | ||
b4d07a3e | 1564 | if (f2fs_has_inline_data(inode) || |
09cbfeaf | 1565 | (pos & PAGE_MASK) >= i_size_read(inode)) { |
b4d07a3e JK |
1566 | f2fs_lock_op(sbi); |
1567 | locked = true; | |
1568 | } | |
1569 | restart: | |
2aadac08 JK |
1570 | /* check inline_data */ |
1571 | ipage = get_node_page(sbi, inode->i_ino); | |
1572 | if (IS_ERR(ipage)) { | |
1573 | err = PTR_ERR(ipage); | |
1574 | goto unlock_out; | |
1575 | } | |
1576 | ||
1577 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1578 | ||
1579 | if (f2fs_has_inline_data(inode)) { | |
1580 | if (pos + len <= MAX_INLINE_DATA) { | |
1581 | read_inline_data(page, ipage); | |
91942321 | 1582 | set_inode_flag(inode, FI_DATA_EXIST); |
ab47036d CY |
1583 | if (inode->i_nlink) |
1584 | set_inline_node(ipage); | |
2aadac08 JK |
1585 | } else { |
1586 | err = f2fs_convert_inline_page(&dn, page); | |
1587 | if (err) | |
b4d07a3e JK |
1588 | goto out; |
1589 | if (dn.data_blkaddr == NULL_ADDR) | |
1590 | err = f2fs_get_block(&dn, index); | |
1591 | } | |
1592 | } else if (locked) { | |
1593 | err = f2fs_get_block(&dn, index); | |
1594 | } else { | |
1595 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1596 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1597 | } else { | |
b4d07a3e JK |
1598 | /* hole case */ |
1599 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
4da7bf5a | 1600 | if (err || dn.data_blkaddr == NULL_ADDR) { |
b4d07a3e JK |
1601 | f2fs_put_dnode(&dn); |
1602 | f2fs_lock_op(sbi); | |
1603 | locked = true; | |
1604 | goto restart; | |
1605 | } | |
2aadac08 JK |
1606 | } |
1607 | } | |
b4d07a3e | 1608 | |
2aadac08 JK |
1609 | /* convert_inline_page can make node_changed */ |
1610 | *blk_addr = dn.data_blkaddr; | |
1611 | *node_changed = dn.node_changed; | |
b4d07a3e | 1612 | out: |
2aadac08 JK |
1613 | f2fs_put_dnode(&dn); |
1614 | unlock_out: | |
b4d07a3e JK |
1615 | if (locked) |
1616 | f2fs_unlock_op(sbi); | |
2aadac08 JK |
1617 | return err; |
1618 | } | |
1619 | ||
eb47b800 JK |
1620 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1621 | loff_t pos, unsigned len, unsigned flags, | |
1622 | struct page **pagep, void **fsdata) | |
1623 | { | |
1624 | struct inode *inode = mapping->host; | |
4081363f | 1625 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1626 | struct page *page = NULL; |
09cbfeaf | 1627 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
2aadac08 JK |
1628 | bool need_balance = false; |
1629 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1630 | int err = 0; |
1631 | ||
62aed044 CY |
1632 | trace_f2fs_write_begin(inode, pos, len, flags); |
1633 | ||
5f727395 JK |
1634 | /* |
1635 | * We should check this at this moment to avoid deadlock on inode page | |
1636 | * and #0 page. The locking rule for inline_data conversion should be: | |
1637 | * lock_page(page #0) -> lock_page(inode_page) | |
1638 | */ | |
1639 | if (index != 0) { | |
1640 | err = f2fs_convert_inline_inode(inode); | |
1641 | if (err) | |
1642 | goto fail; | |
1643 | } | |
afcb7ca0 | 1644 | repeat: |
e9afe7c8 JK |
1645 | /* |
1646 | * Do not use grab_cache_page_write_begin() to avoid deadlock due to | |
1647 | * wait_for_stable_page. Will wait that below with our IO control. | |
1648 | */ | |
1649 | page = pagecache_get_page(mapping, index, | |
1650 | FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS); | |
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 | |
fcc85a4d JK |
1782 | if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode)) |
1783 | return 0; | |
36abef4e JK |
1784 | if (test_opt(F2FS_I_SB(inode), LFS)) |
1785 | return 0; | |
fcc85a4d | 1786 | |
5302fb00 | 1787 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
70407fad | 1788 | |
82e0a5aa | 1789 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
c8b8e32d | 1790 | err = blockdev_direct_IO(iocb, inode, iter, get_data_block_dio); |
82e0a5aa CY |
1791 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
1792 | ||
1793 | if (rw == WRITE) { | |
6bfc4919 | 1794 | if (err > 0) |
91942321 | 1795 | set_inode_flag(inode, FI_UPDATE_WRITE); |
6bfc4919 JK |
1796 | else if (err < 0) |
1797 | f2fs_write_failed(mapping, offset + count); | |
1798 | } | |
70407fad | 1799 | |
5302fb00 | 1800 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 1801 | |
3aab8f82 | 1802 | return err; |
eb47b800 JK |
1803 | } |
1804 | ||
487261f3 CY |
1805 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
1806 | unsigned int length) | |
eb47b800 JK |
1807 | { |
1808 | struct inode *inode = page->mapping->host; | |
487261f3 | 1809 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 1810 | |
487261f3 | 1811 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
09cbfeaf | 1812 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
1813 | return; |
1814 | ||
487261f3 CY |
1815 | if (PageDirty(page)) { |
1816 | if (inode->i_ino == F2FS_META_INO(sbi)) | |
1817 | dec_page_count(sbi, F2FS_DIRTY_META); | |
1818 | else if (inode->i_ino == F2FS_NODE_INO(sbi)) | |
1819 | dec_page_count(sbi, F2FS_DIRTY_NODES); | |
1820 | else | |
1821 | inode_dec_dirty_pages(inode); | |
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 | }; |