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 | { | |
f568849e LT |
48 | struct f2fs_sb_info *sbi = F2FS_SB(bio->bi_io_vec->bv_page->mapping->host->i_sb); |
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); | |
58 | set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG); | |
59 | sbi->sb->s_flags |= MS_RDONLY; | |
60 | } | |
61 | end_page_writeback(page); | |
62 | dec_page_count(sbi, F2FS_WRITEBACK); | |
f568849e | 63 | } |
93dfe2ac JK |
64 | |
65 | if (bio->bi_private) | |
66 | complete(bio->bi_private); | |
67 | ||
68 | if (!get_pages(sbi, F2FS_WRITEBACK) && | |
69 | !list_empty(&sbi->cp_wait.task_list)) | |
70 | wake_up(&sbi->cp_wait); | |
71 | ||
72 | bio_put(bio); | |
73 | } | |
74 | ||
940a6d34 GZ |
75 | /* |
76 | * Low-level block read/write IO operations. | |
77 | */ | |
78 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
79 | int npages, bool is_read) | |
80 | { | |
81 | struct bio *bio; | |
82 | ||
83 | /* No failure on bio allocation */ | |
84 | bio = bio_alloc(GFP_NOIO, npages); | |
85 | ||
86 | bio->bi_bdev = sbi->sb->s_bdev; | |
f568849e | 87 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); |
940a6d34 GZ |
88 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
89 | ||
90 | return bio; | |
91 | } | |
92 | ||
458e6197 | 93 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 94 | { |
458e6197 JK |
95 | struct f2fs_io_info *fio = &io->fio; |
96 | int rw; | |
93dfe2ac JK |
97 | |
98 | if (!io->bio) | |
99 | return; | |
100 | ||
7e8f2308 | 101 | rw = fio->rw; |
93dfe2ac JK |
102 | |
103 | if (is_read_io(rw)) { | |
940a6d34 GZ |
104 | trace_f2fs_submit_read_bio(io->sbi->sb, rw, |
105 | fio->type, io->bio); | |
76130cca | 106 | submit_bio(rw, io->bio); |
93dfe2ac | 107 | } else { |
940a6d34 GZ |
108 | trace_f2fs_submit_write_bio(io->sbi->sb, rw, |
109 | fio->type, io->bio); | |
110 | /* | |
111 | * META_FLUSH is only from the checkpoint procedure, and we | |
112 | * should wait this metadata bio for FS consistency. | |
113 | */ | |
114 | if (fio->type == META_FLUSH) { | |
115 | DECLARE_COMPLETION_ONSTACK(wait); | |
116 | io->bio->bi_private = &wait; | |
117 | submit_bio(rw, io->bio); | |
118 | wait_for_completion(&wait); | |
119 | } else { | |
120 | submit_bio(rw, io->bio); | |
121 | } | |
93dfe2ac | 122 | } |
940a6d34 | 123 | |
93dfe2ac JK |
124 | io->bio = NULL; |
125 | } | |
126 | ||
127 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
458e6197 | 128 | enum page_type type, int rw) |
93dfe2ac JK |
129 | { |
130 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
131 | struct f2fs_bio_info *io; | |
132 | ||
133 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
134 | ||
135 | mutex_lock(&io->io_mutex); | |
458e6197 JK |
136 | |
137 | /* change META to META_FLUSH in the checkpoint procedure */ | |
138 | if (type >= META_FLUSH) { | |
139 | io->fio.type = META_FLUSH; | |
c434cbc0 | 140 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; |
458e6197 JK |
141 | } |
142 | __submit_merged_bio(io); | |
93dfe2ac JK |
143 | mutex_unlock(&io->io_mutex); |
144 | } | |
145 | ||
146 | /* | |
147 | * Fill the locked page with data located in the block address. | |
148 | * Return unlocked page. | |
149 | */ | |
150 | int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page, | |
151 | block_t blk_addr, int rw) | |
152 | { | |
93dfe2ac JK |
153 | struct bio *bio; |
154 | ||
155 | trace_f2fs_submit_page_bio(page, blk_addr, rw); | |
156 | ||
157 | /* Allocate a new bio */ | |
940a6d34 | 158 | bio = __bio_alloc(sbi, blk_addr, 1, is_read_io(rw)); |
93dfe2ac JK |
159 | |
160 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
161 | bio_put(bio); | |
162 | f2fs_put_page(page, 1); | |
163 | return -EFAULT; | |
164 | } | |
165 | ||
166 | submit_bio(rw, bio); | |
167 | return 0; | |
168 | } | |
169 | ||
170 | void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page, | |
458e6197 | 171 | block_t blk_addr, struct f2fs_io_info *fio) |
93dfe2ac | 172 | { |
458e6197 | 173 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 174 | struct f2fs_bio_info *io; |
940a6d34 | 175 | bool is_read = is_read_io(fio->rw); |
93dfe2ac | 176 | |
940a6d34 | 177 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac JK |
178 | |
179 | verify_block_addr(sbi, blk_addr); | |
180 | ||
181 | mutex_lock(&io->io_mutex); | |
182 | ||
940a6d34 | 183 | if (!is_read) |
93dfe2ac JK |
184 | inc_page_count(sbi, F2FS_WRITEBACK); |
185 | ||
63a0b7cb | 186 | if (io->bio && (io->last_block_in_bio != blk_addr - 1 || |
458e6197 JK |
187 | io->fio.rw != fio->rw)) |
188 | __submit_merged_bio(io); | |
93dfe2ac JK |
189 | alloc_new: |
190 | if (io->bio == NULL) { | |
940a6d34 GZ |
191 | int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); |
192 | ||
193 | io->bio = __bio_alloc(sbi, blk_addr, bio_blocks, is_read); | |
458e6197 | 194 | io->fio = *fio; |
93dfe2ac JK |
195 | } |
196 | ||
197 | if (bio_add_page(io->bio, page, PAGE_CACHE_SIZE, 0) < | |
198 | PAGE_CACHE_SIZE) { | |
458e6197 | 199 | __submit_merged_bio(io); |
93dfe2ac JK |
200 | goto alloc_new; |
201 | } | |
202 | ||
203 | io->last_block_in_bio = blk_addr; | |
204 | ||
205 | mutex_unlock(&io->io_mutex); | |
458e6197 | 206 | trace_f2fs_submit_page_mbio(page, fio->rw, fio->type, blk_addr); |
93dfe2ac JK |
207 | } |
208 | ||
0a8165d7 | 209 | /* |
eb47b800 JK |
210 | * Lock ordering for the change of data block address: |
211 | * ->data_page | |
212 | * ->node_page | |
213 | * update block addresses in the node page | |
214 | */ | |
215 | static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) | |
216 | { | |
217 | struct f2fs_node *rn; | |
218 | __le32 *addr_array; | |
219 | struct page *node_page = dn->node_page; | |
220 | unsigned int ofs_in_node = dn->ofs_in_node; | |
221 | ||
5514f0aa | 222 | f2fs_wait_on_page_writeback(node_page, NODE); |
eb47b800 | 223 | |
45590710 | 224 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
225 | |
226 | /* Get physical address of data block */ | |
227 | addr_array = blkaddr_in_node(rn); | |
228 | addr_array[ofs_in_node] = cpu_to_le32(new_addr); | |
229 | set_page_dirty(node_page); | |
230 | } | |
231 | ||
232 | int reserve_new_block(struct dnode_of_data *dn) | |
233 | { | |
234 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
235 | ||
6bacf52f | 236 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 237 | return -EPERM; |
cfb271d4 | 238 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
239 | return -ENOSPC; |
240 | ||
c01e2853 NJ |
241 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
242 | ||
eb47b800 JK |
243 | __set_data_blkaddr(dn, NEW_ADDR); |
244 | dn->data_blkaddr = NEW_ADDR; | |
a18ff063 | 245 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
246 | sync_inode_page(dn); |
247 | return 0; | |
248 | } | |
249 | ||
b600965c HL |
250 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
251 | { | |
252 | bool need_put = dn->inode_page ? false : true; | |
253 | int err; | |
254 | ||
a8865372 JK |
255 | /* if inode_page exists, index should be zero */ |
256 | f2fs_bug_on(!need_put && index); | |
257 | ||
b600965c HL |
258 | err = get_dnode_of_data(dn, index, ALLOC_NODE); |
259 | if (err) | |
260 | return err; | |
a8865372 | 261 | |
b600965c HL |
262 | if (dn->data_blkaddr == NULL_ADDR) |
263 | err = reserve_new_block(dn); | |
a8865372 | 264 | if (err || need_put) |
b600965c HL |
265 | f2fs_put_dnode(dn); |
266 | return err; | |
267 | } | |
268 | ||
eb47b800 JK |
269 | static int check_extent_cache(struct inode *inode, pgoff_t pgofs, |
270 | struct buffer_head *bh_result) | |
271 | { | |
272 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
eb47b800 JK |
273 | pgoff_t start_fofs, end_fofs; |
274 | block_t start_blkaddr; | |
275 | ||
c11abd1a JK |
276 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
277 | return 0; | |
278 | ||
eb47b800 JK |
279 | read_lock(&fi->ext.ext_lock); |
280 | if (fi->ext.len == 0) { | |
281 | read_unlock(&fi->ext.ext_lock); | |
282 | return 0; | |
283 | } | |
284 | ||
dcdfff65 JK |
285 | stat_inc_total_hit(inode->i_sb); |
286 | ||
eb47b800 JK |
287 | start_fofs = fi->ext.fofs; |
288 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
289 | start_blkaddr = fi->ext.blk_addr; | |
290 | ||
291 | if (pgofs >= start_fofs && pgofs <= end_fofs) { | |
292 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; | |
293 | size_t count; | |
294 | ||
295 | clear_buffer_new(bh_result); | |
296 | map_bh(bh_result, inode->i_sb, | |
297 | start_blkaddr + pgofs - start_fofs); | |
298 | count = end_fofs - pgofs + 1; | |
299 | if (count < (UINT_MAX >> blkbits)) | |
300 | bh_result->b_size = (count << blkbits); | |
301 | else | |
302 | bh_result->b_size = UINT_MAX; | |
303 | ||
dcdfff65 | 304 | stat_inc_read_hit(inode->i_sb); |
eb47b800 JK |
305 | read_unlock(&fi->ext.ext_lock); |
306 | return 1; | |
307 | } | |
308 | read_unlock(&fi->ext.ext_lock); | |
309 | return 0; | |
310 | } | |
311 | ||
312 | void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) | |
313 | { | |
314 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); | |
315 | pgoff_t fofs, start_fofs, end_fofs; | |
316 | block_t start_blkaddr, end_blkaddr; | |
c11abd1a | 317 | int need_update = true; |
eb47b800 | 318 | |
5d56b671 | 319 | f2fs_bug_on(blk_addr == NEW_ADDR); |
de93653f JK |
320 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + |
321 | dn->ofs_in_node; | |
eb47b800 JK |
322 | |
323 | /* Update the page address in the parent node */ | |
324 | __set_data_blkaddr(dn, blk_addr); | |
325 | ||
c11abd1a JK |
326 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
327 | return; | |
328 | ||
eb47b800 JK |
329 | write_lock(&fi->ext.ext_lock); |
330 | ||
331 | start_fofs = fi->ext.fofs; | |
332 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
333 | start_blkaddr = fi->ext.blk_addr; | |
334 | end_blkaddr = fi->ext.blk_addr + fi->ext.len - 1; | |
335 | ||
336 | /* Drop and initialize the matched extent */ | |
337 | if (fi->ext.len == 1 && fofs == start_fofs) | |
338 | fi->ext.len = 0; | |
339 | ||
340 | /* Initial extent */ | |
341 | if (fi->ext.len == 0) { | |
342 | if (blk_addr != NULL_ADDR) { | |
343 | fi->ext.fofs = fofs; | |
344 | fi->ext.blk_addr = blk_addr; | |
345 | fi->ext.len = 1; | |
346 | } | |
347 | goto end_update; | |
348 | } | |
349 | ||
6224da87 | 350 | /* Front merge */ |
eb47b800 JK |
351 | if (fofs == start_fofs - 1 && blk_addr == start_blkaddr - 1) { |
352 | fi->ext.fofs--; | |
353 | fi->ext.blk_addr--; | |
354 | fi->ext.len++; | |
355 | goto end_update; | |
356 | } | |
357 | ||
358 | /* Back merge */ | |
359 | if (fofs == end_fofs + 1 && blk_addr == end_blkaddr + 1) { | |
360 | fi->ext.len++; | |
361 | goto end_update; | |
362 | } | |
363 | ||
364 | /* Split the existing extent */ | |
365 | if (fi->ext.len > 1 && | |
366 | fofs >= start_fofs && fofs <= end_fofs) { | |
367 | if ((end_fofs - fofs) < (fi->ext.len >> 1)) { | |
368 | fi->ext.len = fofs - start_fofs; | |
369 | } else { | |
370 | fi->ext.fofs = fofs + 1; | |
371 | fi->ext.blk_addr = start_blkaddr + | |
372 | fofs - start_fofs + 1; | |
373 | fi->ext.len -= fofs - start_fofs + 1; | |
374 | } | |
c11abd1a JK |
375 | } else { |
376 | need_update = false; | |
eb47b800 | 377 | } |
eb47b800 | 378 | |
c11abd1a JK |
379 | /* Finally, if the extent is very fragmented, let's drop the cache. */ |
380 | if (fi->ext.len < F2FS_MIN_EXTENT_LEN) { | |
381 | fi->ext.len = 0; | |
382 | set_inode_flag(fi, FI_NO_EXTENT); | |
383 | need_update = true; | |
384 | } | |
eb47b800 JK |
385 | end_update: |
386 | write_unlock(&fi->ext.ext_lock); | |
c11abd1a JK |
387 | if (need_update) |
388 | sync_inode_page(dn); | |
389 | return; | |
eb47b800 JK |
390 | } |
391 | ||
c718379b | 392 | struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) |
eb47b800 JK |
393 | { |
394 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
395 | struct address_space *mapping = inode->i_mapping; | |
396 | struct dnode_of_data dn; | |
397 | struct page *page; | |
398 | int err; | |
399 | ||
400 | page = find_get_page(mapping, index); | |
401 | if (page && PageUptodate(page)) | |
402 | return page; | |
403 | f2fs_put_page(page, 0); | |
404 | ||
405 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 406 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
eb47b800 JK |
407 | if (err) |
408 | return ERR_PTR(err); | |
409 | f2fs_put_dnode(&dn); | |
410 | ||
411 | if (dn.data_blkaddr == NULL_ADDR) | |
412 | return ERR_PTR(-ENOENT); | |
413 | ||
414 | /* By fallocate(), there is no cached page, but with NEW_ADDR */ | |
6bacf52f | 415 | if (unlikely(dn.data_blkaddr == NEW_ADDR)) |
eb47b800 JK |
416 | return ERR_PTR(-EINVAL); |
417 | ||
6f85b352 | 418 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
eb47b800 JK |
419 | if (!page) |
420 | return ERR_PTR(-ENOMEM); | |
421 | ||
393ff91f JK |
422 | if (PageUptodate(page)) { |
423 | unlock_page(page); | |
424 | return page; | |
425 | } | |
426 | ||
93dfe2ac | 427 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
c718379b | 428 | sync ? READ_SYNC : READA); |
1069bbf7 CY |
429 | if (err) |
430 | return ERR_PTR(err); | |
431 | ||
c718379b JK |
432 | if (sync) { |
433 | wait_on_page_locked(page); | |
6bacf52f | 434 | if (unlikely(!PageUptodate(page))) { |
c718379b JK |
435 | f2fs_put_page(page, 0); |
436 | return ERR_PTR(-EIO); | |
437 | } | |
eb47b800 | 438 | } |
eb47b800 JK |
439 | return page; |
440 | } | |
441 | ||
0a8165d7 | 442 | /* |
eb47b800 JK |
443 | * If it tries to access a hole, return an error. |
444 | * Because, the callers, functions in dir.c and GC, should be able to know | |
445 | * whether this page exists or not. | |
446 | */ | |
447 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index) | |
448 | { | |
449 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
450 | struct address_space *mapping = inode->i_mapping; | |
451 | struct dnode_of_data dn; | |
452 | struct page *page; | |
453 | int err; | |
454 | ||
650495de | 455 | repeat: |
6f85b352 | 456 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
650495de JK |
457 | if (!page) |
458 | return ERR_PTR(-ENOMEM); | |
459 | ||
eb47b800 | 460 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 461 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
650495de JK |
462 | if (err) { |
463 | f2fs_put_page(page, 1); | |
eb47b800 | 464 | return ERR_PTR(err); |
650495de | 465 | } |
eb47b800 JK |
466 | f2fs_put_dnode(&dn); |
467 | ||
6bacf52f | 468 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
650495de | 469 | f2fs_put_page(page, 1); |
eb47b800 | 470 | return ERR_PTR(-ENOENT); |
650495de | 471 | } |
eb47b800 JK |
472 | |
473 | if (PageUptodate(page)) | |
474 | return page; | |
475 | ||
d59ff4df JK |
476 | /* |
477 | * A new dentry page is allocated but not able to be written, since its | |
478 | * new inode page couldn't be allocated due to -ENOSPC. | |
479 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
480 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
481 | */ | |
482 | if (dn.data_blkaddr == NEW_ADDR) { | |
483 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
484 | SetPageUptodate(page); | |
485 | return page; | |
486 | } | |
eb47b800 | 487 | |
93dfe2ac | 488 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, READ_SYNC); |
393ff91f | 489 | if (err) |
eb47b800 | 490 | return ERR_PTR(err); |
393ff91f JK |
491 | |
492 | lock_page(page); | |
6bacf52f | 493 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
494 | f2fs_put_page(page, 1); |
495 | return ERR_PTR(-EIO); | |
eb47b800 | 496 | } |
6bacf52f | 497 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
498 | f2fs_put_page(page, 1); |
499 | goto repeat; | |
eb47b800 JK |
500 | } |
501 | return page; | |
502 | } | |
503 | ||
0a8165d7 | 504 | /* |
eb47b800 JK |
505 | * Caller ensures that this data page is never allocated. |
506 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 507 | * |
4f4124d0 CY |
508 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
509 | * f2fs_unlock_op(). | |
a8865372 | 510 | * Note that, ipage is set only by make_empty_dir. |
eb47b800 | 511 | */ |
64aa7ed9 | 512 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 513 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 JK |
514 | { |
515 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
516 | struct address_space *mapping = inode->i_mapping; | |
517 | struct page *page; | |
518 | struct dnode_of_data dn; | |
519 | int err; | |
520 | ||
a8865372 | 521 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 522 | err = f2fs_reserve_block(&dn, index); |
eb47b800 JK |
523 | if (err) |
524 | return ERR_PTR(err); | |
afcb7ca0 | 525 | repeat: |
eb47b800 | 526 | page = grab_cache_page(mapping, index); |
a8865372 JK |
527 | if (!page) { |
528 | err = -ENOMEM; | |
529 | goto put_err; | |
530 | } | |
eb47b800 JK |
531 | |
532 | if (PageUptodate(page)) | |
533 | return page; | |
534 | ||
535 | if (dn.data_blkaddr == NEW_ADDR) { | |
536 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 537 | SetPageUptodate(page); |
eb47b800 | 538 | } else { |
93dfe2ac JK |
539 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
540 | READ_SYNC); | |
393ff91f | 541 | if (err) |
a8865372 JK |
542 | goto put_err; |
543 | ||
393ff91f | 544 | lock_page(page); |
6bacf52f | 545 | if (unlikely(!PageUptodate(page))) { |
393ff91f | 546 | f2fs_put_page(page, 1); |
a8865372 JK |
547 | err = -EIO; |
548 | goto put_err; | |
eb47b800 | 549 | } |
6bacf52f | 550 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
551 | f2fs_put_page(page, 1); |
552 | goto repeat; | |
eb47b800 JK |
553 | } |
554 | } | |
eb47b800 JK |
555 | |
556 | if (new_i_size && | |
557 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
558 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
559 | /* Only the directory inode sets new_i_size */ |
560 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
561 | } |
562 | return page; | |
a8865372 JK |
563 | |
564 | put_err: | |
565 | f2fs_put_dnode(&dn); | |
566 | return ERR_PTR(err); | |
eb47b800 JK |
567 | } |
568 | ||
bfad7c2d JK |
569 | static int __allocate_data_block(struct dnode_of_data *dn) |
570 | { | |
571 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
572 | struct f2fs_summary sum; | |
573 | block_t new_blkaddr; | |
574 | struct node_info ni; | |
575 | int type; | |
576 | ||
577 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
578 | return -EPERM; | |
579 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) | |
580 | return -ENOSPC; | |
581 | ||
582 | __set_data_blkaddr(dn, NEW_ADDR); | |
583 | dn->data_blkaddr = NEW_ADDR; | |
584 | ||
585 | get_node_info(sbi, dn->nid, &ni); | |
586 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
587 | ||
588 | type = CURSEG_WARM_DATA; | |
589 | ||
590 | allocate_data_block(sbi, NULL, NULL_ADDR, &new_blkaddr, &sum, type); | |
591 | ||
592 | /* direct IO doesn't use extent cache to maximize the performance */ | |
593 | set_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
594 | update_extent_cache(new_blkaddr, dn); | |
595 | clear_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
596 | ||
597 | dn->data_blkaddr = new_blkaddr; | |
598 | return 0; | |
599 | } | |
600 | ||
0a8165d7 | 601 | /* |
4f4124d0 CY |
602 | * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. |
603 | * If original data blocks are allocated, then give them to blockdev. | |
604 | * Otherwise, | |
605 | * a. preallocate requested block addresses | |
606 | * b. do not use extent cache for better performance | |
607 | * c. give the block addresses to blockdev | |
eb47b800 | 608 | */ |
bfad7c2d | 609 | static int get_data_block(struct inode *inode, sector_t iblock, |
eb47b800 JK |
610 | struct buffer_head *bh_result, int create) |
611 | { | |
bfad7c2d | 612 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
eb47b800 JK |
613 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; |
614 | unsigned maxblocks = bh_result->b_size >> blkbits; | |
615 | struct dnode_of_data dn; | |
bfad7c2d JK |
616 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
617 | pgoff_t pgofs, end_offset; | |
618 | int err = 0, ofs = 1; | |
619 | bool allocated = false; | |
eb47b800 JK |
620 | |
621 | /* Get the page offset from the block offset(iblock) */ | |
622 | pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits)); | |
623 | ||
bfad7c2d JK |
624 | if (check_extent_cache(inode, pgofs, bh_result)) |
625 | goto out; | |
626 | ||
627 | if (create) | |
628 | f2fs_lock_op(sbi); | |
eb47b800 JK |
629 | |
630 | /* When reading holes, we need its node page */ | |
631 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 632 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 633 | if (err) { |
bfad7c2d JK |
634 | if (err == -ENOENT) |
635 | err = 0; | |
636 | goto unlock_out; | |
848753aa | 637 | } |
1ec79083 JK |
638 | if (dn.data_blkaddr == NEW_ADDR) |
639 | goto put_out; | |
eb47b800 | 640 | |
bfad7c2d JK |
641 | if (dn.data_blkaddr != NULL_ADDR) { |
642 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
643 | } else if (create) { | |
644 | err = __allocate_data_block(&dn); | |
645 | if (err) | |
646 | goto put_out; | |
647 | allocated = true; | |
648 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
649 | } else { | |
650 | goto put_out; | |
651 | } | |
652 | ||
653 | end_offset = IS_INODE(dn.node_page) ? | |
654 | ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; | |
655 | bh_result->b_size = (((size_t)1) << blkbits); | |
656 | dn.ofs_in_node++; | |
657 | pgofs++; | |
658 | ||
659 | get_next: | |
660 | if (dn.ofs_in_node >= end_offset) { | |
661 | if (allocated) | |
662 | sync_inode_page(&dn); | |
663 | allocated = false; | |
664 | f2fs_put_dnode(&dn); | |
665 | ||
666 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
667 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 668 | if (err) { |
bfad7c2d JK |
669 | if (err == -ENOENT) |
670 | err = 0; | |
671 | goto unlock_out; | |
672 | } | |
1ec79083 JK |
673 | if (dn.data_blkaddr == NEW_ADDR) |
674 | goto put_out; | |
675 | ||
eb47b800 | 676 | end_offset = IS_INODE(dn.node_page) ? |
bfad7c2d JK |
677 | ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; |
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); | |
799 | if ((page->index >= end_index + 1) || !offset) { | |
800 | if (S_ISDIR(inode->i_mode)) { | |
801 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
802 | inode_dec_dirty_dents(inode); | |
803 | } | |
39936837 | 804 | goto out; |
eb47b800 JK |
805 | } |
806 | ||
807 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 808 | write: |
cfb271d4 | 809 | if (unlikely(sbi->por_doing)) { |
39936837 | 810 | err = AOP_WRITEPAGE_ACTIVATE; |
eb47b800 | 811 | goto redirty_out; |
39936837 | 812 | } |
eb47b800 | 813 | |
39936837 | 814 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 JK |
815 | if (S_ISDIR(inode->i_mode)) { |
816 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
817 | inode_dec_dirty_dents(inode); | |
458e6197 | 818 | err = do_write_data_page(page, &fio); |
39936837 | 819 | } else { |
e479556b | 820 | f2fs_lock_op(sbi); |
9ffe0fb5 HL |
821 | |
822 | if (f2fs_has_inline_data(inode) || f2fs_may_inline(inode)) { | |
823 | err = f2fs_write_inline_data(inode, page, offset); | |
824 | f2fs_unlock_op(sbi); | |
825 | goto out; | |
826 | } else { | |
827 | err = do_write_data_page(page, &fio); | |
828 | } | |
829 | ||
e479556b | 830 | f2fs_unlock_op(sbi); |
39936837 | 831 | need_balance_fs = true; |
eb47b800 | 832 | } |
39936837 JK |
833 | if (err == -ENOENT) |
834 | goto out; | |
835 | else if (err) | |
836 | goto redirty_out; | |
eb47b800 | 837 | |
c33ec326 | 838 | if (wbc->for_reclaim) { |
458e6197 | 839 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
c33ec326 JK |
840 | need_balance_fs = false; |
841 | } | |
eb47b800 | 842 | |
eb47b800 | 843 | clear_cold_data(page); |
39936837 | 844 | out: |
eb47b800 | 845 | unlock_page(page); |
39936837 | 846 | if (need_balance_fs) |
eb47b800 JK |
847 | f2fs_balance_fs(sbi); |
848 | return 0; | |
849 | ||
eb47b800 JK |
850 | redirty_out: |
851 | wbc->pages_skipped++; | |
852 | set_page_dirty(page); | |
39936837 | 853 | return err; |
eb47b800 JK |
854 | } |
855 | ||
856 | #define MAX_DESIRED_PAGES_WP 4096 | |
857 | ||
fa9150a8 NJ |
858 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
859 | void *data) | |
860 | { | |
861 | struct address_space *mapping = data; | |
862 | int ret = mapping->a_ops->writepage(page, wbc); | |
863 | mapping_set_error(mapping, ret); | |
864 | return ret; | |
865 | } | |
866 | ||
25ca923b | 867 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
868 | struct writeback_control *wbc) |
869 | { | |
870 | struct inode *inode = mapping->host; | |
871 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
531ad7d5 | 872 | bool locked = false; |
eb47b800 JK |
873 | int ret; |
874 | long excess_nrtw = 0, desired_nrtw; | |
875 | ||
cfb185a1 | 876 | /* deal with chardevs and other special file */ |
877 | if (!mapping->a_ops->writepage) | |
878 | return 0; | |
879 | ||
eb47b800 JK |
880 | if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) { |
881 | desired_nrtw = MAX_DESIRED_PAGES_WP; | |
882 | excess_nrtw = desired_nrtw - wbc->nr_to_write; | |
883 | wbc->nr_to_write = desired_nrtw; | |
884 | } | |
885 | ||
531ad7d5 | 886 | if (!S_ISDIR(inode->i_mode)) { |
eb47b800 | 887 | mutex_lock(&sbi->writepages); |
531ad7d5 JK |
888 | locked = true; |
889 | } | |
fa9150a8 | 890 | ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
531ad7d5 | 891 | if (locked) |
eb47b800 | 892 | mutex_unlock(&sbi->writepages); |
458e6197 JK |
893 | |
894 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
895 | |
896 | remove_dirty_dir_inode(inode); | |
897 | ||
898 | wbc->nr_to_write -= excess_nrtw; | |
899 | return ret; | |
900 | } | |
901 | ||
902 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, | |
903 | loff_t pos, unsigned len, unsigned flags, | |
904 | struct page **pagep, void **fsdata) | |
905 | { | |
906 | struct inode *inode = mapping->host; | |
907 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
908 | struct page *page; | |
909 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; | |
910 | struct dnode_of_data dn; | |
911 | int err = 0; | |
912 | ||
eb47b800 | 913 | f2fs_balance_fs(sbi); |
afcb7ca0 | 914 | repeat: |
9e09fc85 JK |
915 | err = f2fs_convert_inline_data(inode, pos + len); |
916 | if (err) | |
917 | return err; | |
918 | ||
eb47b800 JK |
919 | page = grab_cache_page_write_begin(mapping, index, flags); |
920 | if (!page) | |
921 | return -ENOMEM; | |
922 | *pagep = page; | |
923 | ||
9e09fc85 JK |
924 | if (f2fs_has_inline_data(inode) && (pos + len) <= MAX_INLINE_DATA) |
925 | goto inline_data; | |
9ffe0fb5 | 926 | |
e479556b | 927 | f2fs_lock_op(sbi); |
eb47b800 | 928 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 929 | err = f2fs_reserve_block(&dn, index); |
e479556b | 930 | f2fs_unlock_op(sbi); |
eb47b800 | 931 | |
b600965c HL |
932 | if (err) { |
933 | f2fs_put_page(page, 1); | |
934 | return err; | |
935 | } | |
9ffe0fb5 | 936 | inline_data: |
eb47b800 JK |
937 | if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) |
938 | return 0; | |
939 | ||
940 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
941 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
942 | unsigned end = start + len; | |
943 | ||
944 | /* Reading beyond i_size is simple: memset to zero */ | |
945 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
393ff91f | 946 | goto out; |
eb47b800 JK |
947 | } |
948 | ||
949 | if (dn.data_blkaddr == NEW_ADDR) { | |
950 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
951 | } else { | |
9ffe0fb5 HL |
952 | if (f2fs_has_inline_data(inode)) |
953 | err = f2fs_read_inline_data(inode, page); | |
954 | else | |
955 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, | |
93dfe2ac | 956 | READ_SYNC); |
393ff91f | 957 | if (err) |
eb47b800 | 958 | return err; |
393ff91f | 959 | lock_page(page); |
6bacf52f | 960 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
961 | f2fs_put_page(page, 1); |
962 | return -EIO; | |
eb47b800 | 963 | } |
6bacf52f | 964 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
965 | f2fs_put_page(page, 1); |
966 | goto repeat; | |
eb47b800 JK |
967 | } |
968 | } | |
393ff91f | 969 | out: |
eb47b800 JK |
970 | SetPageUptodate(page); |
971 | clear_cold_data(page); | |
972 | return 0; | |
973 | } | |
974 | ||
a1dd3c13 JK |
975 | static int f2fs_write_end(struct file *file, |
976 | struct address_space *mapping, | |
977 | loff_t pos, unsigned len, unsigned copied, | |
978 | struct page *page, void *fsdata) | |
979 | { | |
980 | struct inode *inode = page->mapping->host; | |
981 | ||
982 | SetPageUptodate(page); | |
983 | set_page_dirty(page); | |
984 | ||
985 | if (pos + copied > i_size_read(inode)) { | |
986 | i_size_write(inode, pos + copied); | |
987 | mark_inode_dirty(inode); | |
988 | update_inode_page(inode); | |
989 | } | |
990 | ||
75c3c8bc | 991 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
992 | return copied; |
993 | } | |
994 | ||
944fcfc1 JK |
995 | static int check_direct_IO(struct inode *inode, int rw, |
996 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
997 | { | |
998 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
999 | int i; | |
1000 | ||
1001 | if (rw == READ) | |
1002 | return 0; | |
1003 | ||
1004 | if (offset & blocksize_mask) | |
1005 | return -EINVAL; | |
1006 | ||
1007 | for (i = 0; i < nr_segs; i++) | |
1008 | if (iov[i].iov_len & blocksize_mask) | |
1009 | return -EINVAL; | |
1010 | return 0; | |
1011 | } | |
1012 | ||
eb47b800 JK |
1013 | static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, |
1014 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
1015 | { | |
1016 | struct file *file = iocb->ki_filp; | |
1017 | struct inode *inode = file->f_mapping->host; | |
944fcfc1 | 1018 | |
9ffe0fb5 HL |
1019 | /* Let buffer I/O handle the inline data case. */ |
1020 | if (f2fs_has_inline_data(inode)) | |
1021 | return 0; | |
1022 | ||
944fcfc1 JK |
1023 | if (check_direct_IO(inode, rw, iov, offset, nr_segs)) |
1024 | return 0; | |
1025 | ||
eb47b800 | 1026 | return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, |
bfad7c2d | 1027 | get_data_block); |
eb47b800 JK |
1028 | } |
1029 | ||
d47992f8 LC |
1030 | static void f2fs_invalidate_data_page(struct page *page, unsigned int offset, |
1031 | unsigned int length) | |
eb47b800 JK |
1032 | { |
1033 | struct inode *inode = page->mapping->host; | |
1034 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
1035 | if (S_ISDIR(inode->i_mode) && PageDirty(page)) { | |
1036 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
1037 | inode_dec_dirty_dents(inode); | |
1038 | } | |
1039 | ClearPagePrivate(page); | |
1040 | } | |
1041 | ||
1042 | static int f2fs_release_data_page(struct page *page, gfp_t wait) | |
1043 | { | |
1044 | ClearPagePrivate(page); | |
c3850aa1 | 1045 | return 1; |
eb47b800 JK |
1046 | } |
1047 | ||
1048 | static int f2fs_set_data_page_dirty(struct page *page) | |
1049 | { | |
1050 | struct address_space *mapping = page->mapping; | |
1051 | struct inode *inode = mapping->host; | |
1052 | ||
26c6b887 JK |
1053 | trace_f2fs_set_page_dirty(page, DATA); |
1054 | ||
eb47b800 | 1055 | SetPageUptodate(page); |
a18ff063 JK |
1056 | mark_inode_dirty(inode); |
1057 | ||
eb47b800 JK |
1058 | if (!PageDirty(page)) { |
1059 | __set_page_dirty_nobuffers(page); | |
1060 | set_dirty_dir_page(inode, page); | |
1061 | return 1; | |
1062 | } | |
1063 | return 0; | |
1064 | } | |
1065 | ||
c01e54b7 JK |
1066 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1067 | { | |
bfad7c2d | 1068 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1069 | } |
1070 | ||
eb47b800 JK |
1071 | const struct address_space_operations f2fs_dblock_aops = { |
1072 | .readpage = f2fs_read_data_page, | |
1073 | .readpages = f2fs_read_data_pages, | |
1074 | .writepage = f2fs_write_data_page, | |
1075 | .writepages = f2fs_write_data_pages, | |
1076 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1077 | .write_end = f2fs_write_end, |
eb47b800 JK |
1078 | .set_page_dirty = f2fs_set_data_page_dirty, |
1079 | .invalidatepage = f2fs_invalidate_data_page, | |
1080 | .releasepage = f2fs_release_data_page, | |
1081 | .direct_IO = f2fs_direct_IO, | |
c01e54b7 | 1082 | .bmap = f2fs_bmap, |
eb47b800 | 1083 | }; |