Commit | Line | Data |
---|---|---|
0a8165d7 | 1 | /* |
eb47b800 JK |
2 | * fs/f2fs/data.c |
3 | * | |
4 | * Copyright (c) 2012 Samsung Electronics Co., Ltd. | |
5 | * http://www.samsung.com/ | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/fs.h> | |
12 | #include <linux/f2fs_fs.h> | |
13 | #include <linux/buffer_head.h> | |
14 | #include <linux/mpage.h> | |
a27bb332 | 15 | #include <linux/aio.h> |
eb47b800 JK |
16 | #include <linux/writeback.h> |
17 | #include <linux/backing-dev.h> | |
18 | #include <linux/blkdev.h> | |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
eb47b800 JK |
21 | |
22 | #include "f2fs.h" | |
23 | #include "node.h" | |
24 | #include "segment.h" | |
848753aa | 25 | #include <trace/events/f2fs.h> |
eb47b800 | 26 | |
93dfe2ac JK |
27 | static void f2fs_read_end_io(struct bio *bio, int err) |
28 | { | |
f568849e LT |
29 | struct bio_vec *bvec; |
30 | int i; | |
93dfe2ac | 31 | |
f568849e | 32 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
33 | struct page *page = bvec->bv_page; |
34 | ||
f568849e LT |
35 | if (!err) { |
36 | SetPageUptodate(page); | |
37 | } else { | |
93dfe2ac JK |
38 | ClearPageUptodate(page); |
39 | SetPageError(page); | |
40 | } | |
41 | unlock_page(page); | |
f568849e | 42 | } |
93dfe2ac JK |
43 | bio_put(bio); |
44 | } | |
45 | ||
46 | static void f2fs_write_end_io(struct bio *bio, int err) | |
47 | { | |
1b1f559f | 48 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
49 | struct bio_vec *bvec; |
50 | int i; | |
93dfe2ac | 51 | |
f568849e | 52 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
53 | struct page *page = bvec->bv_page; |
54 | ||
f568849e | 55 | if (unlikely(err)) { |
93dfe2ac JK |
56 | SetPageError(page); |
57 | set_bit(AS_EIO, &page->mapping->flags); | |
744602cf | 58 | f2fs_stop_checkpoint(sbi); |
93dfe2ac JK |
59 | } |
60 | end_page_writeback(page); | |
61 | dec_page_count(sbi, F2FS_WRITEBACK); | |
f568849e | 62 | } |
93dfe2ac | 63 | |
1b1f559f JK |
64 | if (sbi->wait_io) { |
65 | complete(sbi->wait_io); | |
66 | sbi->wait_io = NULL; | |
67 | } | |
93dfe2ac JK |
68 | |
69 | if (!get_pages(sbi, F2FS_WRITEBACK) && | |
70 | !list_empty(&sbi->cp_wait.task_list)) | |
71 | wake_up(&sbi->cp_wait); | |
72 | ||
73 | bio_put(bio); | |
74 | } | |
75 | ||
940a6d34 GZ |
76 | /* |
77 | * Low-level block read/write IO operations. | |
78 | */ | |
79 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
80 | int npages, bool is_read) | |
81 | { | |
82 | struct bio *bio; | |
83 | ||
84 | /* No failure on bio allocation */ | |
85 | bio = bio_alloc(GFP_NOIO, npages); | |
86 | ||
87 | bio->bi_bdev = sbi->sb->s_bdev; | |
f568849e | 88 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); |
940a6d34 | 89 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
1b1f559f | 90 | bio->bi_private = sbi; |
940a6d34 GZ |
91 | |
92 | return bio; | |
93 | } | |
94 | ||
458e6197 | 95 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 96 | { |
458e6197 JK |
97 | struct f2fs_io_info *fio = &io->fio; |
98 | int rw; | |
93dfe2ac JK |
99 | |
100 | if (!io->bio) | |
101 | return; | |
102 | ||
7e8f2308 | 103 | rw = fio->rw; |
93dfe2ac JK |
104 | |
105 | if (is_read_io(rw)) { | |
940a6d34 GZ |
106 | trace_f2fs_submit_read_bio(io->sbi->sb, rw, |
107 | fio->type, io->bio); | |
76130cca | 108 | submit_bio(rw, io->bio); |
93dfe2ac | 109 | } else { |
940a6d34 GZ |
110 | trace_f2fs_submit_write_bio(io->sbi->sb, rw, |
111 | fio->type, io->bio); | |
112 | /* | |
113 | * META_FLUSH is only from the checkpoint procedure, and we | |
114 | * should wait this metadata bio for FS consistency. | |
115 | */ | |
116 | if (fio->type == META_FLUSH) { | |
117 | DECLARE_COMPLETION_ONSTACK(wait); | |
1b1f559f | 118 | io->sbi->wait_io = &wait; |
940a6d34 GZ |
119 | submit_bio(rw, io->bio); |
120 | wait_for_completion(&wait); | |
121 | } else { | |
122 | submit_bio(rw, io->bio); | |
123 | } | |
93dfe2ac | 124 | } |
940a6d34 | 125 | |
93dfe2ac JK |
126 | io->bio = NULL; |
127 | } | |
128 | ||
129 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
458e6197 | 130 | enum page_type type, int rw) |
93dfe2ac JK |
131 | { |
132 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
133 | struct f2fs_bio_info *io; | |
134 | ||
135 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
136 | ||
df0f8dc0 | 137 | down_write(&io->io_rwsem); |
458e6197 JK |
138 | |
139 | /* change META to META_FLUSH in the checkpoint procedure */ | |
140 | if (type >= META_FLUSH) { | |
141 | io->fio.type = META_FLUSH; | |
c434cbc0 | 142 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; |
458e6197 JK |
143 | } |
144 | __submit_merged_bio(io); | |
df0f8dc0 | 145 | up_write(&io->io_rwsem); |
93dfe2ac JK |
146 | } |
147 | ||
148 | /* | |
149 | * Fill the locked page with data located in the block address. | |
150 | * Return unlocked page. | |
151 | */ | |
152 | int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page, | |
153 | block_t blk_addr, int rw) | |
154 | { | |
93dfe2ac JK |
155 | struct bio *bio; |
156 | ||
157 | trace_f2fs_submit_page_bio(page, blk_addr, rw); | |
158 | ||
159 | /* Allocate a new bio */ | |
940a6d34 | 160 | bio = __bio_alloc(sbi, blk_addr, 1, is_read_io(rw)); |
93dfe2ac JK |
161 | |
162 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
163 | bio_put(bio); | |
164 | f2fs_put_page(page, 1); | |
165 | return -EFAULT; | |
166 | } | |
167 | ||
168 | submit_bio(rw, bio); | |
169 | return 0; | |
170 | } | |
171 | ||
172 | void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page, | |
458e6197 | 173 | block_t blk_addr, struct f2fs_io_info *fio) |
93dfe2ac | 174 | { |
458e6197 | 175 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 176 | struct f2fs_bio_info *io; |
940a6d34 | 177 | bool is_read = is_read_io(fio->rw); |
93dfe2ac | 178 | |
940a6d34 | 179 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac JK |
180 | |
181 | verify_block_addr(sbi, blk_addr); | |
182 | ||
df0f8dc0 | 183 | down_write(&io->io_rwsem); |
93dfe2ac | 184 | |
940a6d34 | 185 | if (!is_read) |
93dfe2ac JK |
186 | inc_page_count(sbi, F2FS_WRITEBACK); |
187 | ||
63a0b7cb | 188 | if (io->bio && (io->last_block_in_bio != blk_addr - 1 || |
458e6197 JK |
189 | io->fio.rw != fio->rw)) |
190 | __submit_merged_bio(io); | |
93dfe2ac JK |
191 | alloc_new: |
192 | if (io->bio == NULL) { | |
940a6d34 GZ |
193 | int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); |
194 | ||
195 | io->bio = __bio_alloc(sbi, blk_addr, bio_blocks, is_read); | |
458e6197 | 196 | io->fio = *fio; |
93dfe2ac JK |
197 | } |
198 | ||
199 | if (bio_add_page(io->bio, page, PAGE_CACHE_SIZE, 0) < | |
200 | PAGE_CACHE_SIZE) { | |
458e6197 | 201 | __submit_merged_bio(io); |
93dfe2ac JK |
202 | goto alloc_new; |
203 | } | |
204 | ||
205 | io->last_block_in_bio = blk_addr; | |
206 | ||
df0f8dc0 | 207 | up_write(&io->io_rwsem); |
458e6197 | 208 | trace_f2fs_submit_page_mbio(page, fio->rw, fio->type, blk_addr); |
93dfe2ac JK |
209 | } |
210 | ||
0a8165d7 | 211 | /* |
eb47b800 JK |
212 | * Lock ordering for the change of data block address: |
213 | * ->data_page | |
214 | * ->node_page | |
215 | * update block addresses in the node page | |
216 | */ | |
217 | static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) | |
218 | { | |
219 | struct f2fs_node *rn; | |
220 | __le32 *addr_array; | |
221 | struct page *node_page = dn->node_page; | |
222 | unsigned int ofs_in_node = dn->ofs_in_node; | |
223 | ||
5514f0aa | 224 | f2fs_wait_on_page_writeback(node_page, NODE); |
eb47b800 | 225 | |
45590710 | 226 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
227 | |
228 | /* Get physical address of data block */ | |
229 | addr_array = blkaddr_in_node(rn); | |
230 | addr_array[ofs_in_node] = cpu_to_le32(new_addr); | |
231 | set_page_dirty(node_page); | |
232 | } | |
233 | ||
234 | int reserve_new_block(struct dnode_of_data *dn) | |
235 | { | |
236 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
237 | ||
6bacf52f | 238 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 239 | return -EPERM; |
cfb271d4 | 240 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
241 | return -ENOSPC; |
242 | ||
c01e2853 NJ |
243 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
244 | ||
eb47b800 JK |
245 | __set_data_blkaddr(dn, NEW_ADDR); |
246 | dn->data_blkaddr = NEW_ADDR; | |
a18ff063 | 247 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
248 | sync_inode_page(dn); |
249 | return 0; | |
250 | } | |
251 | ||
b600965c HL |
252 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
253 | { | |
254 | bool need_put = dn->inode_page ? false : true; | |
255 | int err; | |
256 | ||
a8865372 JK |
257 | /* if inode_page exists, index should be zero */ |
258 | f2fs_bug_on(!need_put && index); | |
259 | ||
b600965c HL |
260 | err = get_dnode_of_data(dn, index, ALLOC_NODE); |
261 | if (err) | |
262 | return err; | |
a8865372 | 263 | |
b600965c HL |
264 | if (dn->data_blkaddr == NULL_ADDR) |
265 | err = reserve_new_block(dn); | |
a8865372 | 266 | if (err || need_put) |
b600965c HL |
267 | f2fs_put_dnode(dn); |
268 | return err; | |
269 | } | |
270 | ||
eb47b800 JK |
271 | static int check_extent_cache(struct inode *inode, pgoff_t pgofs, |
272 | struct buffer_head *bh_result) | |
273 | { | |
274 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
eb47b800 JK |
275 | pgoff_t start_fofs, end_fofs; |
276 | block_t start_blkaddr; | |
277 | ||
c11abd1a JK |
278 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
279 | return 0; | |
280 | ||
eb47b800 JK |
281 | read_lock(&fi->ext.ext_lock); |
282 | if (fi->ext.len == 0) { | |
283 | read_unlock(&fi->ext.ext_lock); | |
284 | return 0; | |
285 | } | |
286 | ||
dcdfff65 JK |
287 | stat_inc_total_hit(inode->i_sb); |
288 | ||
eb47b800 JK |
289 | start_fofs = fi->ext.fofs; |
290 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
291 | start_blkaddr = fi->ext.blk_addr; | |
292 | ||
293 | if (pgofs >= start_fofs && pgofs <= end_fofs) { | |
294 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; | |
295 | size_t count; | |
296 | ||
297 | clear_buffer_new(bh_result); | |
298 | map_bh(bh_result, inode->i_sb, | |
299 | start_blkaddr + pgofs - start_fofs); | |
300 | count = end_fofs - pgofs + 1; | |
301 | if (count < (UINT_MAX >> blkbits)) | |
302 | bh_result->b_size = (count << blkbits); | |
303 | else | |
304 | bh_result->b_size = UINT_MAX; | |
305 | ||
dcdfff65 | 306 | stat_inc_read_hit(inode->i_sb); |
eb47b800 JK |
307 | read_unlock(&fi->ext.ext_lock); |
308 | return 1; | |
309 | } | |
310 | read_unlock(&fi->ext.ext_lock); | |
311 | return 0; | |
312 | } | |
313 | ||
314 | void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) | |
315 | { | |
316 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); | |
317 | pgoff_t fofs, start_fofs, end_fofs; | |
318 | block_t start_blkaddr, end_blkaddr; | |
c11abd1a | 319 | int need_update = true; |
eb47b800 | 320 | |
5d56b671 | 321 | f2fs_bug_on(blk_addr == NEW_ADDR); |
de93653f JK |
322 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + |
323 | dn->ofs_in_node; | |
eb47b800 JK |
324 | |
325 | /* Update the page address in the parent node */ | |
326 | __set_data_blkaddr(dn, blk_addr); | |
327 | ||
c11abd1a JK |
328 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
329 | return; | |
330 | ||
eb47b800 JK |
331 | write_lock(&fi->ext.ext_lock); |
332 | ||
333 | start_fofs = fi->ext.fofs; | |
334 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
335 | start_blkaddr = fi->ext.blk_addr; | |
336 | end_blkaddr = fi->ext.blk_addr + fi->ext.len - 1; | |
337 | ||
338 | /* Drop and initialize the matched extent */ | |
339 | if (fi->ext.len == 1 && fofs == start_fofs) | |
340 | fi->ext.len = 0; | |
341 | ||
342 | /* Initial extent */ | |
343 | if (fi->ext.len == 0) { | |
344 | if (blk_addr != NULL_ADDR) { | |
345 | fi->ext.fofs = fofs; | |
346 | fi->ext.blk_addr = blk_addr; | |
347 | fi->ext.len = 1; | |
348 | } | |
349 | goto end_update; | |
350 | } | |
351 | ||
6224da87 | 352 | /* Front merge */ |
eb47b800 JK |
353 | if (fofs == start_fofs - 1 && blk_addr == start_blkaddr - 1) { |
354 | fi->ext.fofs--; | |
355 | fi->ext.blk_addr--; | |
356 | fi->ext.len++; | |
357 | goto end_update; | |
358 | } | |
359 | ||
360 | /* Back merge */ | |
361 | if (fofs == end_fofs + 1 && blk_addr == end_blkaddr + 1) { | |
362 | fi->ext.len++; | |
363 | goto end_update; | |
364 | } | |
365 | ||
366 | /* Split the existing extent */ | |
367 | if (fi->ext.len > 1 && | |
368 | fofs >= start_fofs && fofs <= end_fofs) { | |
369 | if ((end_fofs - fofs) < (fi->ext.len >> 1)) { | |
370 | fi->ext.len = fofs - start_fofs; | |
371 | } else { | |
372 | fi->ext.fofs = fofs + 1; | |
373 | fi->ext.blk_addr = start_blkaddr + | |
374 | fofs - start_fofs + 1; | |
375 | fi->ext.len -= fofs - start_fofs + 1; | |
376 | } | |
c11abd1a JK |
377 | } else { |
378 | need_update = false; | |
eb47b800 | 379 | } |
eb47b800 | 380 | |
c11abd1a JK |
381 | /* Finally, if the extent is very fragmented, let's drop the cache. */ |
382 | if (fi->ext.len < F2FS_MIN_EXTENT_LEN) { | |
383 | fi->ext.len = 0; | |
384 | set_inode_flag(fi, FI_NO_EXTENT); | |
385 | need_update = true; | |
386 | } | |
eb47b800 JK |
387 | end_update: |
388 | write_unlock(&fi->ext.ext_lock); | |
c11abd1a JK |
389 | if (need_update) |
390 | sync_inode_page(dn); | |
391 | return; | |
eb47b800 JK |
392 | } |
393 | ||
c718379b | 394 | struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) |
eb47b800 JK |
395 | { |
396 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
397 | struct address_space *mapping = inode->i_mapping; | |
398 | struct dnode_of_data dn; | |
399 | struct page *page; | |
400 | int err; | |
401 | ||
402 | page = find_get_page(mapping, index); | |
403 | if (page && PageUptodate(page)) | |
404 | return page; | |
405 | f2fs_put_page(page, 0); | |
406 | ||
407 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 408 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
eb47b800 JK |
409 | if (err) |
410 | return ERR_PTR(err); | |
411 | f2fs_put_dnode(&dn); | |
412 | ||
413 | if (dn.data_blkaddr == NULL_ADDR) | |
414 | return ERR_PTR(-ENOENT); | |
415 | ||
416 | /* By fallocate(), there is no cached page, but with NEW_ADDR */ | |
6bacf52f | 417 | if (unlikely(dn.data_blkaddr == NEW_ADDR)) |
eb47b800 JK |
418 | return ERR_PTR(-EINVAL); |
419 | ||
6f85b352 | 420 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
eb47b800 JK |
421 | if (!page) |
422 | return ERR_PTR(-ENOMEM); | |
423 | ||
393ff91f JK |
424 | if (PageUptodate(page)) { |
425 | unlock_page(page); | |
426 | return page; | |
427 | } | |
428 | ||
93dfe2ac | 429 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
c718379b | 430 | sync ? READ_SYNC : READA); |
1069bbf7 CY |
431 | if (err) |
432 | return ERR_PTR(err); | |
433 | ||
c718379b JK |
434 | if (sync) { |
435 | wait_on_page_locked(page); | |
6bacf52f | 436 | if (unlikely(!PageUptodate(page))) { |
c718379b JK |
437 | f2fs_put_page(page, 0); |
438 | return ERR_PTR(-EIO); | |
439 | } | |
eb47b800 | 440 | } |
eb47b800 JK |
441 | return page; |
442 | } | |
443 | ||
0a8165d7 | 444 | /* |
eb47b800 JK |
445 | * If it tries to access a hole, return an error. |
446 | * Because, the callers, functions in dir.c and GC, should be able to know | |
447 | * whether this page exists or not. | |
448 | */ | |
449 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index) | |
450 | { | |
451 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
452 | struct address_space *mapping = inode->i_mapping; | |
453 | struct dnode_of_data dn; | |
454 | struct page *page; | |
455 | int err; | |
456 | ||
650495de | 457 | repeat: |
6f85b352 | 458 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
650495de JK |
459 | if (!page) |
460 | return ERR_PTR(-ENOMEM); | |
461 | ||
eb47b800 | 462 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 463 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
650495de JK |
464 | if (err) { |
465 | f2fs_put_page(page, 1); | |
eb47b800 | 466 | return ERR_PTR(err); |
650495de | 467 | } |
eb47b800 JK |
468 | f2fs_put_dnode(&dn); |
469 | ||
6bacf52f | 470 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
650495de | 471 | f2fs_put_page(page, 1); |
eb47b800 | 472 | return ERR_PTR(-ENOENT); |
650495de | 473 | } |
eb47b800 JK |
474 | |
475 | if (PageUptodate(page)) | |
476 | return page; | |
477 | ||
d59ff4df JK |
478 | /* |
479 | * A new dentry page is allocated but not able to be written, since its | |
480 | * new inode page couldn't be allocated due to -ENOSPC. | |
481 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
482 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
483 | */ | |
484 | if (dn.data_blkaddr == NEW_ADDR) { | |
485 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
486 | SetPageUptodate(page); | |
487 | return page; | |
488 | } | |
eb47b800 | 489 | |
93dfe2ac | 490 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, READ_SYNC); |
393ff91f | 491 | if (err) |
eb47b800 | 492 | return ERR_PTR(err); |
393ff91f JK |
493 | |
494 | lock_page(page); | |
6bacf52f | 495 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
496 | f2fs_put_page(page, 1); |
497 | return ERR_PTR(-EIO); | |
eb47b800 | 498 | } |
6bacf52f | 499 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
500 | f2fs_put_page(page, 1); |
501 | goto repeat; | |
eb47b800 JK |
502 | } |
503 | return page; | |
504 | } | |
505 | ||
0a8165d7 | 506 | /* |
eb47b800 JK |
507 | * Caller ensures that this data page is never allocated. |
508 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 509 | * |
4f4124d0 CY |
510 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
511 | * f2fs_unlock_op(). | |
a8865372 | 512 | * Note that, ipage is set only by make_empty_dir. |
eb47b800 | 513 | */ |
64aa7ed9 | 514 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 515 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 JK |
516 | { |
517 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
518 | struct address_space *mapping = inode->i_mapping; | |
519 | struct page *page; | |
520 | struct dnode_of_data dn; | |
521 | int err; | |
522 | ||
a8865372 | 523 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 524 | err = f2fs_reserve_block(&dn, index); |
eb47b800 JK |
525 | if (err) |
526 | return ERR_PTR(err); | |
afcb7ca0 | 527 | repeat: |
eb47b800 | 528 | page = grab_cache_page(mapping, index); |
a8865372 JK |
529 | if (!page) { |
530 | err = -ENOMEM; | |
531 | goto put_err; | |
532 | } | |
eb47b800 JK |
533 | |
534 | if (PageUptodate(page)) | |
535 | return page; | |
536 | ||
537 | if (dn.data_blkaddr == NEW_ADDR) { | |
538 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 539 | SetPageUptodate(page); |
eb47b800 | 540 | } else { |
93dfe2ac JK |
541 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
542 | READ_SYNC); | |
393ff91f | 543 | if (err) |
a8865372 JK |
544 | goto put_err; |
545 | ||
393ff91f | 546 | lock_page(page); |
6bacf52f | 547 | if (unlikely(!PageUptodate(page))) { |
393ff91f | 548 | f2fs_put_page(page, 1); |
a8865372 JK |
549 | err = -EIO; |
550 | goto put_err; | |
eb47b800 | 551 | } |
6bacf52f | 552 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
553 | f2fs_put_page(page, 1); |
554 | goto repeat; | |
eb47b800 JK |
555 | } |
556 | } | |
eb47b800 JK |
557 | |
558 | if (new_i_size && | |
559 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
560 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
561 | /* Only the directory inode sets new_i_size */ |
562 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
563 | } |
564 | return page; | |
a8865372 JK |
565 | |
566 | put_err: | |
567 | f2fs_put_dnode(&dn); | |
568 | return ERR_PTR(err); | |
eb47b800 JK |
569 | } |
570 | ||
bfad7c2d JK |
571 | static int __allocate_data_block(struct dnode_of_data *dn) |
572 | { | |
573 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
574 | struct f2fs_summary sum; | |
575 | block_t new_blkaddr; | |
576 | struct node_info ni; | |
577 | int type; | |
578 | ||
579 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
580 | return -EPERM; | |
581 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) | |
582 | return -ENOSPC; | |
583 | ||
584 | __set_data_blkaddr(dn, NEW_ADDR); | |
585 | dn->data_blkaddr = NEW_ADDR; | |
586 | ||
587 | get_node_info(sbi, dn->nid, &ni); | |
588 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
589 | ||
590 | type = CURSEG_WARM_DATA; | |
591 | ||
592 | allocate_data_block(sbi, NULL, NULL_ADDR, &new_blkaddr, &sum, type); | |
593 | ||
594 | /* direct IO doesn't use extent cache to maximize the performance */ | |
595 | set_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
596 | update_extent_cache(new_blkaddr, dn); | |
597 | clear_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
598 | ||
599 | dn->data_blkaddr = new_blkaddr; | |
600 | return 0; | |
601 | } | |
602 | ||
0a8165d7 | 603 | /* |
4f4124d0 CY |
604 | * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. |
605 | * If original data blocks are allocated, then give them to blockdev. | |
606 | * Otherwise, | |
607 | * a. preallocate requested block addresses | |
608 | * b. do not use extent cache for better performance | |
609 | * c. give the block addresses to blockdev | |
eb47b800 | 610 | */ |
bfad7c2d | 611 | static int get_data_block(struct inode *inode, sector_t iblock, |
eb47b800 JK |
612 | struct buffer_head *bh_result, int create) |
613 | { | |
bfad7c2d | 614 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
eb47b800 JK |
615 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; |
616 | unsigned maxblocks = bh_result->b_size >> blkbits; | |
617 | struct dnode_of_data dn; | |
bfad7c2d JK |
618 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
619 | pgoff_t pgofs, end_offset; | |
620 | int err = 0, ofs = 1; | |
621 | bool allocated = false; | |
eb47b800 JK |
622 | |
623 | /* Get the page offset from the block offset(iblock) */ | |
624 | pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits)); | |
625 | ||
bfad7c2d JK |
626 | if (check_extent_cache(inode, pgofs, bh_result)) |
627 | goto out; | |
628 | ||
629 | if (create) | |
630 | f2fs_lock_op(sbi); | |
eb47b800 JK |
631 | |
632 | /* When reading holes, we need its node page */ | |
633 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 634 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 635 | if (err) { |
bfad7c2d JK |
636 | if (err == -ENOENT) |
637 | err = 0; | |
638 | goto unlock_out; | |
848753aa | 639 | } |
1ec79083 JK |
640 | if (dn.data_blkaddr == NEW_ADDR) |
641 | goto put_out; | |
eb47b800 | 642 | |
bfad7c2d JK |
643 | if (dn.data_blkaddr != NULL_ADDR) { |
644 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
645 | } else if (create) { | |
646 | err = __allocate_data_block(&dn); | |
647 | if (err) | |
648 | goto put_out; | |
649 | allocated = true; | |
650 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
651 | } else { | |
652 | goto put_out; | |
653 | } | |
654 | ||
6403eb1f | 655 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d JK |
656 | bh_result->b_size = (((size_t)1) << blkbits); |
657 | dn.ofs_in_node++; | |
658 | pgofs++; | |
659 | ||
660 | get_next: | |
661 | if (dn.ofs_in_node >= end_offset) { | |
662 | if (allocated) | |
663 | sync_inode_page(&dn); | |
664 | allocated = false; | |
665 | f2fs_put_dnode(&dn); | |
666 | ||
667 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
668 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 669 | if (err) { |
bfad7c2d JK |
670 | if (err == -ENOENT) |
671 | err = 0; | |
672 | goto unlock_out; | |
673 | } | |
1ec79083 JK |
674 | if (dn.data_blkaddr == NEW_ADDR) |
675 | goto put_out; | |
676 | ||
6403eb1f | 677 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 678 | } |
eb47b800 | 679 | |
bfad7c2d JK |
680 | if (maxblocks > (bh_result->b_size >> blkbits)) { |
681 | block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
682 | if (blkaddr == NULL_ADDR && create) { | |
683 | err = __allocate_data_block(&dn); | |
684 | if (err) | |
685 | goto sync_out; | |
686 | allocated = true; | |
687 | blkaddr = dn.data_blkaddr; | |
688 | } | |
eb47b800 | 689 | /* Give more consecutive addresses for the read ahead */ |
bfad7c2d JK |
690 | if (blkaddr == (bh_result->b_blocknr + ofs)) { |
691 | ofs++; | |
692 | dn.ofs_in_node++; | |
693 | pgofs++; | |
694 | bh_result->b_size += (((size_t)1) << blkbits); | |
695 | goto get_next; | |
696 | } | |
eb47b800 | 697 | } |
bfad7c2d JK |
698 | sync_out: |
699 | if (allocated) | |
700 | sync_inode_page(&dn); | |
701 | put_out: | |
eb47b800 | 702 | f2fs_put_dnode(&dn); |
bfad7c2d JK |
703 | unlock_out: |
704 | if (create) | |
705 | f2fs_unlock_op(sbi); | |
706 | out: | |
707 | trace_f2fs_get_data_block(inode, iblock, bh_result, err); | |
708 | return err; | |
eb47b800 JK |
709 | } |
710 | ||
711 | static int f2fs_read_data_page(struct file *file, struct page *page) | |
712 | { | |
9ffe0fb5 HL |
713 | struct inode *inode = page->mapping->host; |
714 | int ret; | |
715 | ||
716 | /* If the file has inline data, try to read it directlly */ | |
717 | if (f2fs_has_inline_data(inode)) | |
718 | ret = f2fs_read_inline_data(inode, page); | |
719 | else | |
720 | ret = mpage_readpage(page, get_data_block); | |
721 | ||
722 | return ret; | |
eb47b800 JK |
723 | } |
724 | ||
725 | static int f2fs_read_data_pages(struct file *file, | |
726 | struct address_space *mapping, | |
727 | struct list_head *pages, unsigned nr_pages) | |
728 | { | |
9ffe0fb5 HL |
729 | struct inode *inode = file->f_mapping->host; |
730 | ||
731 | /* If the file has inline data, skip readpages */ | |
732 | if (f2fs_has_inline_data(inode)) | |
733 | return 0; | |
734 | ||
bfad7c2d | 735 | return mpage_readpages(mapping, pages, nr_pages, get_data_block); |
eb47b800 JK |
736 | } |
737 | ||
458e6197 | 738 | int do_write_data_page(struct page *page, struct f2fs_io_info *fio) |
eb47b800 JK |
739 | { |
740 | struct inode *inode = page->mapping->host; | |
458e6197 | 741 | block_t old_blkaddr, new_blkaddr; |
eb47b800 JK |
742 | struct dnode_of_data dn; |
743 | int err = 0; | |
744 | ||
745 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 746 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
747 | if (err) |
748 | return err; | |
749 | ||
458e6197 | 750 | old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
751 | |
752 | /* This page is already truncated */ | |
458e6197 | 753 | if (old_blkaddr == NULL_ADDR) |
eb47b800 JK |
754 | goto out_writepage; |
755 | ||
756 | set_page_writeback(page); | |
757 | ||
758 | /* | |
759 | * If current allocation needs SSR, | |
760 | * it had better in-place writes for updated data. | |
761 | */ | |
458e6197 | 762 | if (unlikely(old_blkaddr != NEW_ADDR && |
b25958b6 HL |
763 | !is_cold_data(page) && |
764 | need_inplace_update(inode))) { | |
458e6197 | 765 | rewrite_data_page(page, old_blkaddr, fio); |
eb47b800 | 766 | } else { |
458e6197 JK |
767 | write_data_page(page, &dn, &new_blkaddr, fio); |
768 | update_extent_cache(new_blkaddr, &dn); | |
eb47b800 JK |
769 | } |
770 | out_writepage: | |
771 | f2fs_put_dnode(&dn); | |
772 | return err; | |
773 | } | |
774 | ||
775 | static int f2fs_write_data_page(struct page *page, | |
776 | struct writeback_control *wbc) | |
777 | { | |
778 | struct inode *inode = page->mapping->host; | |
779 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
780 | loff_t i_size = i_size_read(inode); | |
781 | const pgoff_t end_index = ((unsigned long long) i_size) | |
782 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 783 | unsigned offset = 0; |
39936837 | 784 | bool need_balance_fs = false; |
eb47b800 | 785 | int err = 0; |
458e6197 JK |
786 | struct f2fs_io_info fio = { |
787 | .type = DATA, | |
6c311ec6 | 788 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
458e6197 | 789 | }; |
eb47b800 JK |
790 | |
791 | if (page->index < end_index) | |
39936837 | 792 | goto write; |
eb47b800 JK |
793 | |
794 | /* | |
795 | * If the offset is out-of-range of file size, | |
796 | * this page does not have to be written to disk. | |
797 | */ | |
798 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 799 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 800 | goto out; |
eb47b800 JK |
801 | |
802 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 803 | write: |
8618b881 | 804 | if (unlikely(sbi->por_doing)) |
eb47b800 JK |
805 | goto redirty_out; |
806 | ||
39936837 | 807 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 808 | if (S_ISDIR(inode->i_mode)) { |
458e6197 | 809 | err = do_write_data_page(page, &fio); |
8618b881 JK |
810 | goto done; |
811 | } | |
9ffe0fb5 | 812 | |
8618b881 | 813 | if (!wbc->for_reclaim) |
39936837 | 814 | need_balance_fs = true; |
8618b881 | 815 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 816 | goto redirty_out; |
eb47b800 | 817 | |
8618b881 JK |
818 | f2fs_lock_op(sbi); |
819 | if (f2fs_has_inline_data(inode) || f2fs_may_inline(inode)) | |
820 | err = f2fs_write_inline_data(inode, page, offset); | |
821 | else | |
822 | err = do_write_data_page(page, &fio); | |
823 | f2fs_unlock_op(sbi); | |
824 | done: | |
825 | if (err && err != -ENOENT) | |
826 | goto redirty_out; | |
eb47b800 | 827 | |
eb47b800 | 828 | clear_cold_data(page); |
39936837 | 829 | out: |
76f60268 | 830 | inode_dec_dirty_dents(inode); |
eb47b800 | 831 | unlock_page(page); |
39936837 | 832 | if (need_balance_fs) |
eb47b800 | 833 | f2fs_balance_fs(sbi); |
2aea39ec JK |
834 | if (wbc->for_reclaim) |
835 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
836 | return 0; |
837 | ||
eb47b800 | 838 | redirty_out: |
76f60268 | 839 | redirty_page_for_writepage(wbc, page); |
8618b881 | 840 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
841 | } |
842 | ||
fa9150a8 NJ |
843 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
844 | void *data) | |
845 | { | |
846 | struct address_space *mapping = data; | |
847 | int ret = mapping->a_ops->writepage(page, wbc); | |
848 | mapping_set_error(mapping, ret); | |
849 | return ret; | |
850 | } | |
851 | ||
25ca923b | 852 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
853 | struct writeback_control *wbc) |
854 | { | |
855 | struct inode *inode = mapping->host; | |
856 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
531ad7d5 | 857 | bool locked = false; |
eb47b800 | 858 | int ret; |
50c8cdb3 | 859 | long diff; |
eb47b800 | 860 | |
cfb185a1 | 861 | /* deal with chardevs and other special file */ |
862 | if (!mapping->a_ops->writepage) | |
863 | return 0; | |
864 | ||
87d6f890 | 865 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
6fb03f3a JK |
866 | get_dirty_dents(inode) < nr_pages_to_skip(sbi, DATA) && |
867 | available_free_memory(sbi, DIRTY_DENTS)) | |
d3baf95d | 868 | goto skip_write; |
87d6f890 | 869 | |
50c8cdb3 | 870 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 871 | |
531ad7d5 | 872 | if (!S_ISDIR(inode->i_mode)) { |
eb47b800 | 873 | mutex_lock(&sbi->writepages); |
531ad7d5 JK |
874 | locked = true; |
875 | } | |
fa9150a8 | 876 | ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
531ad7d5 | 877 | if (locked) |
eb47b800 | 878 | mutex_unlock(&sbi->writepages); |
458e6197 JK |
879 | |
880 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
881 | |
882 | remove_dirty_dir_inode(inode); | |
883 | ||
50c8cdb3 | 884 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 885 | return ret; |
d3baf95d JK |
886 | |
887 | skip_write: | |
888 | wbc->pages_skipped += get_dirty_dents(inode); | |
889 | return 0; | |
eb47b800 JK |
890 | } |
891 | ||
892 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, | |
893 | loff_t pos, unsigned len, unsigned flags, | |
894 | struct page **pagep, void **fsdata) | |
895 | { | |
896 | struct inode *inode = mapping->host; | |
897 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
898 | struct page *page; | |
899 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; | |
900 | struct dnode_of_data dn; | |
901 | int err = 0; | |
902 | ||
eb47b800 | 903 | f2fs_balance_fs(sbi); |
afcb7ca0 | 904 | repeat: |
9e09fc85 JK |
905 | err = f2fs_convert_inline_data(inode, pos + len); |
906 | if (err) | |
907 | return err; | |
908 | ||
eb47b800 JK |
909 | page = grab_cache_page_write_begin(mapping, index, flags); |
910 | if (!page) | |
911 | return -ENOMEM; | |
912 | *pagep = page; | |
913 | ||
9e09fc85 JK |
914 | if (f2fs_has_inline_data(inode) && (pos + len) <= MAX_INLINE_DATA) |
915 | goto inline_data; | |
9ffe0fb5 | 916 | |
e479556b | 917 | f2fs_lock_op(sbi); |
eb47b800 | 918 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 919 | err = f2fs_reserve_block(&dn, index); |
e479556b | 920 | f2fs_unlock_op(sbi); |
eb47b800 | 921 | |
b600965c HL |
922 | if (err) { |
923 | f2fs_put_page(page, 1); | |
924 | return err; | |
925 | } | |
9ffe0fb5 | 926 | inline_data: |
eb47b800 JK |
927 | if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) |
928 | return 0; | |
929 | ||
930 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
931 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
932 | unsigned end = start + len; | |
933 | ||
934 | /* Reading beyond i_size is simple: memset to zero */ | |
935 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
393ff91f | 936 | goto out; |
eb47b800 JK |
937 | } |
938 | ||
939 | if (dn.data_blkaddr == NEW_ADDR) { | |
940 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
941 | } else { | |
d54c795b | 942 | if (f2fs_has_inline_data(inode)) { |
9ffe0fb5 | 943 | err = f2fs_read_inline_data(inode, page); |
d54c795b CY |
944 | if (err) { |
945 | page_cache_release(page); | |
946 | return err; | |
947 | } | |
948 | } else { | |
9ffe0fb5 | 949 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
93dfe2ac | 950 | READ_SYNC); |
d54c795b CY |
951 | if (err) |
952 | return err; | |
953 | } | |
954 | ||
393ff91f | 955 | lock_page(page); |
6bacf52f | 956 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
957 | f2fs_put_page(page, 1); |
958 | return -EIO; | |
eb47b800 | 959 | } |
6bacf52f | 960 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
961 | f2fs_put_page(page, 1); |
962 | goto repeat; | |
eb47b800 JK |
963 | } |
964 | } | |
393ff91f | 965 | out: |
eb47b800 JK |
966 | SetPageUptodate(page); |
967 | clear_cold_data(page); | |
968 | return 0; | |
969 | } | |
970 | ||
a1dd3c13 JK |
971 | static int f2fs_write_end(struct file *file, |
972 | struct address_space *mapping, | |
973 | loff_t pos, unsigned len, unsigned copied, | |
974 | struct page *page, void *fsdata) | |
975 | { | |
976 | struct inode *inode = page->mapping->host; | |
977 | ||
978 | SetPageUptodate(page); | |
979 | set_page_dirty(page); | |
980 | ||
981 | if (pos + copied > i_size_read(inode)) { | |
982 | i_size_write(inode, pos + copied); | |
983 | mark_inode_dirty(inode); | |
984 | update_inode_page(inode); | |
985 | } | |
986 | ||
75c3c8bc | 987 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
988 | return copied; |
989 | } | |
990 | ||
944fcfc1 JK |
991 | static int check_direct_IO(struct inode *inode, int rw, |
992 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
993 | { | |
994 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
995 | int i; | |
996 | ||
997 | if (rw == READ) | |
998 | return 0; | |
999 | ||
1000 | if (offset & blocksize_mask) | |
1001 | return -EINVAL; | |
1002 | ||
1003 | for (i = 0; i < nr_segs; i++) | |
1004 | if (iov[i].iov_len & blocksize_mask) | |
1005 | return -EINVAL; | |
1006 | return 0; | |
1007 | } | |
1008 | ||
eb47b800 JK |
1009 | static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, |
1010 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
1011 | { | |
1012 | struct file *file = iocb->ki_filp; | |
1013 | struct inode *inode = file->f_mapping->host; | |
944fcfc1 | 1014 | |
9ffe0fb5 HL |
1015 | /* Let buffer I/O handle the inline data case. */ |
1016 | if (f2fs_has_inline_data(inode)) | |
1017 | return 0; | |
1018 | ||
944fcfc1 JK |
1019 | if (check_direct_IO(inode, rw, iov, offset, nr_segs)) |
1020 | return 0; | |
1021 | ||
eb47b800 | 1022 | return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, |
bfad7c2d | 1023 | get_data_block); |
eb47b800 JK |
1024 | } |
1025 | ||
d47992f8 LC |
1026 | static void f2fs_invalidate_data_page(struct page *page, unsigned int offset, |
1027 | unsigned int length) | |
eb47b800 JK |
1028 | { |
1029 | struct inode *inode = page->mapping->host; | |
1fe54f9d | 1030 | if (PageDirty(page)) |
eb47b800 | 1031 | inode_dec_dirty_dents(inode); |
eb47b800 JK |
1032 | ClearPagePrivate(page); |
1033 | } | |
1034 | ||
1035 | static int f2fs_release_data_page(struct page *page, gfp_t wait) | |
1036 | { | |
1037 | ClearPagePrivate(page); | |
c3850aa1 | 1038 | return 1; |
eb47b800 JK |
1039 | } |
1040 | ||
1041 | static int f2fs_set_data_page_dirty(struct page *page) | |
1042 | { | |
1043 | struct address_space *mapping = page->mapping; | |
1044 | struct inode *inode = mapping->host; | |
1045 | ||
26c6b887 JK |
1046 | trace_f2fs_set_page_dirty(page, DATA); |
1047 | ||
eb47b800 | 1048 | SetPageUptodate(page); |
a18ff063 JK |
1049 | mark_inode_dirty(inode); |
1050 | ||
eb47b800 JK |
1051 | if (!PageDirty(page)) { |
1052 | __set_page_dirty_nobuffers(page); | |
1053 | set_dirty_dir_page(inode, page); | |
1054 | return 1; | |
1055 | } | |
1056 | return 0; | |
1057 | } | |
1058 | ||
c01e54b7 JK |
1059 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1060 | { | |
454ae7e5 CY |
1061 | struct inode *inode = mapping->host; |
1062 | ||
1063 | if (f2fs_has_inline_data(inode)) | |
1064 | return 0; | |
1065 | ||
bfad7c2d | 1066 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1067 | } |
1068 | ||
eb47b800 JK |
1069 | const struct address_space_operations f2fs_dblock_aops = { |
1070 | .readpage = f2fs_read_data_page, | |
1071 | .readpages = f2fs_read_data_pages, | |
1072 | .writepage = f2fs_write_data_page, | |
1073 | .writepages = f2fs_write_data_pages, | |
1074 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1075 | .write_end = f2fs_write_end, |
eb47b800 JK |
1076 | .set_page_dirty = f2fs_set_data_page_dirty, |
1077 | .invalidatepage = f2fs_invalidate_data_page, | |
1078 | .releasepage = f2fs_release_data_page, | |
1079 | .direct_IO = f2fs_direct_IO, | |
c01e54b7 | 1080 | .bmap = f2fs_bmap, |
eb47b800 | 1081 | }; |