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 | { | |
29 | const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); | |
30 | struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; | |
31 | ||
32 | do { | |
33 | struct page *page = bvec->bv_page; | |
34 | ||
35 | if (--bvec >= bio->bi_io_vec) | |
36 | prefetchw(&bvec->bv_page->flags); | |
37 | ||
6bacf52f | 38 | if (unlikely(!uptodate)) { |
93dfe2ac JK |
39 | ClearPageUptodate(page); |
40 | SetPageError(page); | |
6bacf52f JK |
41 | } else { |
42 | SetPageUptodate(page); | |
93dfe2ac JK |
43 | } |
44 | unlock_page(page); | |
45 | } while (bvec >= bio->bi_io_vec); | |
46 | ||
47 | bio_put(bio); | |
48 | } | |
49 | ||
50 | static void f2fs_write_end_io(struct bio *bio, int err) | |
51 | { | |
52 | const int uptodate = test_bit(BIO_UPTODATE, &bio->bi_flags); | |
53 | struct bio_vec *bvec = bio->bi_io_vec + bio->bi_vcnt - 1; | |
54 | struct f2fs_sb_info *sbi = F2FS_SB(bvec->bv_page->mapping->host->i_sb); | |
55 | ||
56 | do { | |
57 | struct page *page = bvec->bv_page; | |
58 | ||
59 | if (--bvec >= bio->bi_io_vec) | |
60 | prefetchw(&bvec->bv_page->flags); | |
61 | ||
6bacf52f | 62 | if (unlikely(!uptodate)) { |
93dfe2ac JK |
63 | SetPageError(page); |
64 | set_bit(AS_EIO, &page->mapping->flags); | |
65 | set_ckpt_flags(sbi->ckpt, CP_ERROR_FLAG); | |
66 | sbi->sb->s_flags |= MS_RDONLY; | |
67 | } | |
68 | end_page_writeback(page); | |
69 | dec_page_count(sbi, F2FS_WRITEBACK); | |
70 | } while (bvec >= bio->bi_io_vec); | |
71 | ||
72 | if (bio->bi_private) | |
73 | complete(bio->bi_private); | |
74 | ||
75 | if (!get_pages(sbi, F2FS_WRITEBACK) && | |
76 | !list_empty(&sbi->cp_wait.task_list)) | |
77 | wake_up(&sbi->cp_wait); | |
78 | ||
79 | bio_put(bio); | |
80 | } | |
81 | ||
940a6d34 GZ |
82 | /* |
83 | * Low-level block read/write IO operations. | |
84 | */ | |
85 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
86 | int npages, bool is_read) | |
87 | { | |
88 | struct bio *bio; | |
89 | ||
90 | /* No failure on bio allocation */ | |
91 | bio = bio_alloc(GFP_NOIO, npages); | |
92 | ||
93 | bio->bi_bdev = sbi->sb->s_bdev; | |
94 | bio->bi_sector = SECTOR_FROM_BLOCK(sbi, blk_addr); | |
95 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; | |
96 | ||
97 | return bio; | |
98 | } | |
99 | ||
458e6197 | 100 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 101 | { |
458e6197 JK |
102 | struct f2fs_io_info *fio = &io->fio; |
103 | int rw; | |
93dfe2ac JK |
104 | |
105 | if (!io->bio) | |
106 | return; | |
107 | ||
7e8f2308 | 108 | rw = fio->rw; |
93dfe2ac JK |
109 | |
110 | if (is_read_io(rw)) { | |
940a6d34 GZ |
111 | trace_f2fs_submit_read_bio(io->sbi->sb, rw, |
112 | fio->type, io->bio); | |
76130cca | 113 | submit_bio(rw, io->bio); |
93dfe2ac | 114 | } else { |
940a6d34 GZ |
115 | trace_f2fs_submit_write_bio(io->sbi->sb, rw, |
116 | fio->type, io->bio); | |
117 | /* | |
118 | * META_FLUSH is only from the checkpoint procedure, and we | |
119 | * should wait this metadata bio for FS consistency. | |
120 | */ | |
121 | if (fio->type == META_FLUSH) { | |
122 | DECLARE_COMPLETION_ONSTACK(wait); | |
123 | io->bio->bi_private = &wait; | |
124 | submit_bio(rw, io->bio); | |
125 | wait_for_completion(&wait); | |
126 | } else { | |
127 | submit_bio(rw, io->bio); | |
128 | } | |
93dfe2ac | 129 | } |
940a6d34 | 130 | |
93dfe2ac JK |
131 | io->bio = NULL; |
132 | } | |
133 | ||
134 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
458e6197 | 135 | enum page_type type, int rw) |
93dfe2ac JK |
136 | { |
137 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
138 | struct f2fs_bio_info *io; | |
139 | ||
140 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
141 | ||
142 | mutex_lock(&io->io_mutex); | |
458e6197 JK |
143 | |
144 | /* change META to META_FLUSH in the checkpoint procedure */ | |
145 | if (type >= META_FLUSH) { | |
146 | io->fio.type = META_FLUSH; | |
147 | io->fio.rw = WRITE_FLUSH_FUA; | |
148 | } | |
149 | __submit_merged_bio(io); | |
93dfe2ac JK |
150 | mutex_unlock(&io->io_mutex); |
151 | } | |
152 | ||
153 | /* | |
154 | * Fill the locked page with data located in the block address. | |
155 | * Return unlocked page. | |
156 | */ | |
157 | int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page, | |
158 | block_t blk_addr, int rw) | |
159 | { | |
93dfe2ac JK |
160 | struct bio *bio; |
161 | ||
162 | trace_f2fs_submit_page_bio(page, blk_addr, rw); | |
163 | ||
164 | /* Allocate a new bio */ | |
940a6d34 | 165 | bio = __bio_alloc(sbi, blk_addr, 1, is_read_io(rw)); |
93dfe2ac JK |
166 | |
167 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
168 | bio_put(bio); | |
169 | f2fs_put_page(page, 1); | |
170 | return -EFAULT; | |
171 | } | |
172 | ||
173 | submit_bio(rw, bio); | |
174 | return 0; | |
175 | } | |
176 | ||
177 | void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page, | |
458e6197 | 178 | block_t blk_addr, struct f2fs_io_info *fio) |
93dfe2ac | 179 | { |
458e6197 | 180 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 181 | struct f2fs_bio_info *io; |
940a6d34 | 182 | bool is_read = is_read_io(fio->rw); |
93dfe2ac | 183 | |
940a6d34 | 184 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac JK |
185 | |
186 | verify_block_addr(sbi, blk_addr); | |
187 | ||
188 | mutex_lock(&io->io_mutex); | |
189 | ||
940a6d34 | 190 | if (!is_read) |
93dfe2ac JK |
191 | inc_page_count(sbi, F2FS_WRITEBACK); |
192 | ||
63a0b7cb | 193 | if (io->bio && (io->last_block_in_bio != blk_addr - 1 || |
458e6197 JK |
194 | io->fio.rw != fio->rw)) |
195 | __submit_merged_bio(io); | |
93dfe2ac JK |
196 | alloc_new: |
197 | if (io->bio == NULL) { | |
940a6d34 GZ |
198 | int bio_blocks = MAX_BIO_BLOCKS(max_hw_blocks(sbi)); |
199 | ||
200 | io->bio = __bio_alloc(sbi, blk_addr, bio_blocks, is_read); | |
458e6197 | 201 | io->fio = *fio; |
93dfe2ac JK |
202 | } |
203 | ||
204 | if (bio_add_page(io->bio, page, PAGE_CACHE_SIZE, 0) < | |
205 | PAGE_CACHE_SIZE) { | |
458e6197 | 206 | __submit_merged_bio(io); |
93dfe2ac JK |
207 | goto alloc_new; |
208 | } | |
209 | ||
210 | io->last_block_in_bio = blk_addr; | |
211 | ||
212 | mutex_unlock(&io->io_mutex); | |
458e6197 | 213 | trace_f2fs_submit_page_mbio(page, fio->rw, fio->type, blk_addr); |
93dfe2ac JK |
214 | } |
215 | ||
0a8165d7 | 216 | /* |
eb47b800 JK |
217 | * Lock ordering for the change of data block address: |
218 | * ->data_page | |
219 | * ->node_page | |
220 | * update block addresses in the node page | |
221 | */ | |
222 | static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) | |
223 | { | |
224 | struct f2fs_node *rn; | |
225 | __le32 *addr_array; | |
226 | struct page *node_page = dn->node_page; | |
227 | unsigned int ofs_in_node = dn->ofs_in_node; | |
228 | ||
5514f0aa | 229 | f2fs_wait_on_page_writeback(node_page, NODE); |
eb47b800 | 230 | |
45590710 | 231 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
232 | |
233 | /* Get physical address of data block */ | |
234 | addr_array = blkaddr_in_node(rn); | |
235 | addr_array[ofs_in_node] = cpu_to_le32(new_addr); | |
236 | set_page_dirty(node_page); | |
237 | } | |
238 | ||
239 | int reserve_new_block(struct dnode_of_data *dn) | |
240 | { | |
241 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
242 | ||
6bacf52f | 243 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 244 | return -EPERM; |
cfb271d4 | 245 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
246 | return -ENOSPC; |
247 | ||
c01e2853 NJ |
248 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
249 | ||
eb47b800 JK |
250 | __set_data_blkaddr(dn, NEW_ADDR); |
251 | dn->data_blkaddr = NEW_ADDR; | |
252 | sync_inode_page(dn); | |
253 | return 0; | |
254 | } | |
255 | ||
b600965c HL |
256 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
257 | { | |
258 | bool need_put = dn->inode_page ? false : true; | |
259 | int err; | |
260 | ||
a8865372 JK |
261 | /* if inode_page exists, index should be zero */ |
262 | f2fs_bug_on(!need_put && index); | |
263 | ||
b600965c HL |
264 | err = get_dnode_of_data(dn, index, ALLOC_NODE); |
265 | if (err) | |
266 | return err; | |
a8865372 | 267 | |
b600965c HL |
268 | if (dn->data_blkaddr == NULL_ADDR) |
269 | err = reserve_new_block(dn); | |
a8865372 | 270 | if (err || need_put) |
b600965c HL |
271 | f2fs_put_dnode(dn); |
272 | return err; | |
273 | } | |
274 | ||
eb47b800 JK |
275 | static int check_extent_cache(struct inode *inode, pgoff_t pgofs, |
276 | struct buffer_head *bh_result) | |
277 | { | |
278 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
eb47b800 JK |
279 | pgoff_t start_fofs, end_fofs; |
280 | block_t start_blkaddr; | |
281 | ||
c11abd1a JK |
282 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
283 | return 0; | |
284 | ||
eb47b800 JK |
285 | read_lock(&fi->ext.ext_lock); |
286 | if (fi->ext.len == 0) { | |
287 | read_unlock(&fi->ext.ext_lock); | |
288 | return 0; | |
289 | } | |
290 | ||
dcdfff65 JK |
291 | stat_inc_total_hit(inode->i_sb); |
292 | ||
eb47b800 JK |
293 | start_fofs = fi->ext.fofs; |
294 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
295 | start_blkaddr = fi->ext.blk_addr; | |
296 | ||
297 | if (pgofs >= start_fofs && pgofs <= end_fofs) { | |
298 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; | |
299 | size_t count; | |
300 | ||
301 | clear_buffer_new(bh_result); | |
302 | map_bh(bh_result, inode->i_sb, | |
303 | start_blkaddr + pgofs - start_fofs); | |
304 | count = end_fofs - pgofs + 1; | |
305 | if (count < (UINT_MAX >> blkbits)) | |
306 | bh_result->b_size = (count << blkbits); | |
307 | else | |
308 | bh_result->b_size = UINT_MAX; | |
309 | ||
dcdfff65 | 310 | stat_inc_read_hit(inode->i_sb); |
eb47b800 JK |
311 | read_unlock(&fi->ext.ext_lock); |
312 | return 1; | |
313 | } | |
314 | read_unlock(&fi->ext.ext_lock); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) | |
319 | { | |
320 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); | |
321 | pgoff_t fofs, start_fofs, end_fofs; | |
322 | block_t start_blkaddr, end_blkaddr; | |
c11abd1a | 323 | int need_update = true; |
eb47b800 | 324 | |
5d56b671 | 325 | f2fs_bug_on(blk_addr == NEW_ADDR); |
de93653f JK |
326 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + |
327 | dn->ofs_in_node; | |
eb47b800 JK |
328 | |
329 | /* Update the page address in the parent node */ | |
330 | __set_data_blkaddr(dn, blk_addr); | |
331 | ||
c11abd1a JK |
332 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
333 | return; | |
334 | ||
eb47b800 JK |
335 | write_lock(&fi->ext.ext_lock); |
336 | ||
337 | start_fofs = fi->ext.fofs; | |
338 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
339 | start_blkaddr = fi->ext.blk_addr; | |
340 | end_blkaddr = fi->ext.blk_addr + fi->ext.len - 1; | |
341 | ||
342 | /* Drop and initialize the matched extent */ | |
343 | if (fi->ext.len == 1 && fofs == start_fofs) | |
344 | fi->ext.len = 0; | |
345 | ||
346 | /* Initial extent */ | |
347 | if (fi->ext.len == 0) { | |
348 | if (blk_addr != NULL_ADDR) { | |
349 | fi->ext.fofs = fofs; | |
350 | fi->ext.blk_addr = blk_addr; | |
351 | fi->ext.len = 1; | |
352 | } | |
353 | goto end_update; | |
354 | } | |
355 | ||
6224da87 | 356 | /* Front merge */ |
eb47b800 JK |
357 | if (fofs == start_fofs - 1 && blk_addr == start_blkaddr - 1) { |
358 | fi->ext.fofs--; | |
359 | fi->ext.blk_addr--; | |
360 | fi->ext.len++; | |
361 | goto end_update; | |
362 | } | |
363 | ||
364 | /* Back merge */ | |
365 | if (fofs == end_fofs + 1 && blk_addr == end_blkaddr + 1) { | |
366 | fi->ext.len++; | |
367 | goto end_update; | |
368 | } | |
369 | ||
370 | /* Split the existing extent */ | |
371 | if (fi->ext.len > 1 && | |
372 | fofs >= start_fofs && fofs <= end_fofs) { | |
373 | if ((end_fofs - fofs) < (fi->ext.len >> 1)) { | |
374 | fi->ext.len = fofs - start_fofs; | |
375 | } else { | |
376 | fi->ext.fofs = fofs + 1; | |
377 | fi->ext.blk_addr = start_blkaddr + | |
378 | fofs - start_fofs + 1; | |
379 | fi->ext.len -= fofs - start_fofs + 1; | |
380 | } | |
c11abd1a JK |
381 | } else { |
382 | need_update = false; | |
eb47b800 | 383 | } |
eb47b800 | 384 | |
c11abd1a JK |
385 | /* Finally, if the extent is very fragmented, let's drop the cache. */ |
386 | if (fi->ext.len < F2FS_MIN_EXTENT_LEN) { | |
387 | fi->ext.len = 0; | |
388 | set_inode_flag(fi, FI_NO_EXTENT); | |
389 | need_update = true; | |
390 | } | |
eb47b800 JK |
391 | end_update: |
392 | write_unlock(&fi->ext.ext_lock); | |
c11abd1a JK |
393 | if (need_update) |
394 | sync_inode_page(dn); | |
395 | return; | |
eb47b800 JK |
396 | } |
397 | ||
c718379b | 398 | struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) |
eb47b800 JK |
399 | { |
400 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
401 | struct address_space *mapping = inode->i_mapping; | |
402 | struct dnode_of_data dn; | |
403 | struct page *page; | |
404 | int err; | |
405 | ||
406 | page = find_get_page(mapping, index); | |
407 | if (page && PageUptodate(page)) | |
408 | return page; | |
409 | f2fs_put_page(page, 0); | |
410 | ||
411 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 412 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
eb47b800 JK |
413 | if (err) |
414 | return ERR_PTR(err); | |
415 | f2fs_put_dnode(&dn); | |
416 | ||
417 | if (dn.data_blkaddr == NULL_ADDR) | |
418 | return ERR_PTR(-ENOENT); | |
419 | ||
420 | /* By fallocate(), there is no cached page, but with NEW_ADDR */ | |
6bacf52f | 421 | if (unlikely(dn.data_blkaddr == NEW_ADDR)) |
eb47b800 JK |
422 | return ERR_PTR(-EINVAL); |
423 | ||
6f85b352 | 424 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
eb47b800 JK |
425 | if (!page) |
426 | return ERR_PTR(-ENOMEM); | |
427 | ||
393ff91f JK |
428 | if (PageUptodate(page)) { |
429 | unlock_page(page); | |
430 | return page; | |
431 | } | |
432 | ||
93dfe2ac | 433 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
c718379b | 434 | sync ? READ_SYNC : READA); |
1069bbf7 CY |
435 | if (err) |
436 | return ERR_PTR(err); | |
437 | ||
c718379b JK |
438 | if (sync) { |
439 | wait_on_page_locked(page); | |
6bacf52f | 440 | if (unlikely(!PageUptodate(page))) { |
c718379b JK |
441 | f2fs_put_page(page, 0); |
442 | return ERR_PTR(-EIO); | |
443 | } | |
eb47b800 | 444 | } |
eb47b800 JK |
445 | return page; |
446 | } | |
447 | ||
0a8165d7 | 448 | /* |
eb47b800 JK |
449 | * If it tries to access a hole, return an error. |
450 | * Because, the callers, functions in dir.c and GC, should be able to know | |
451 | * whether this page exists or not. | |
452 | */ | |
453 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index) | |
454 | { | |
455 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
456 | struct address_space *mapping = inode->i_mapping; | |
457 | struct dnode_of_data dn; | |
458 | struct page *page; | |
459 | int err; | |
460 | ||
650495de | 461 | repeat: |
6f85b352 | 462 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
650495de JK |
463 | if (!page) |
464 | return ERR_PTR(-ENOMEM); | |
465 | ||
eb47b800 | 466 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 467 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
650495de JK |
468 | if (err) { |
469 | f2fs_put_page(page, 1); | |
eb47b800 | 470 | return ERR_PTR(err); |
650495de | 471 | } |
eb47b800 JK |
472 | f2fs_put_dnode(&dn); |
473 | ||
6bacf52f | 474 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
650495de | 475 | f2fs_put_page(page, 1); |
eb47b800 | 476 | return ERR_PTR(-ENOENT); |
650495de | 477 | } |
eb47b800 JK |
478 | |
479 | if (PageUptodate(page)) | |
480 | return page; | |
481 | ||
d59ff4df JK |
482 | /* |
483 | * A new dentry page is allocated but not able to be written, since its | |
484 | * new inode page couldn't be allocated due to -ENOSPC. | |
485 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
486 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
487 | */ | |
488 | if (dn.data_blkaddr == NEW_ADDR) { | |
489 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
490 | SetPageUptodate(page); | |
491 | return page; | |
492 | } | |
eb47b800 | 493 | |
93dfe2ac | 494 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, READ_SYNC); |
393ff91f | 495 | if (err) |
eb47b800 | 496 | return ERR_PTR(err); |
393ff91f JK |
497 | |
498 | lock_page(page); | |
6bacf52f | 499 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
500 | f2fs_put_page(page, 1); |
501 | return ERR_PTR(-EIO); | |
eb47b800 | 502 | } |
6bacf52f | 503 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
504 | f2fs_put_page(page, 1); |
505 | goto repeat; | |
eb47b800 JK |
506 | } |
507 | return page; | |
508 | } | |
509 | ||
0a8165d7 | 510 | /* |
eb47b800 JK |
511 | * Caller ensures that this data page is never allocated. |
512 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 513 | * |
4f4124d0 CY |
514 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
515 | * f2fs_unlock_op(). | |
a8865372 | 516 | * Note that, ipage is set only by make_empty_dir. |
eb47b800 | 517 | */ |
64aa7ed9 | 518 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 519 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 JK |
520 | { |
521 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
522 | struct address_space *mapping = inode->i_mapping; | |
523 | struct page *page; | |
524 | struct dnode_of_data dn; | |
525 | int err; | |
526 | ||
a8865372 | 527 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 528 | err = f2fs_reserve_block(&dn, index); |
eb47b800 JK |
529 | if (err) |
530 | return ERR_PTR(err); | |
afcb7ca0 | 531 | repeat: |
eb47b800 | 532 | page = grab_cache_page(mapping, index); |
a8865372 JK |
533 | if (!page) { |
534 | err = -ENOMEM; | |
535 | goto put_err; | |
536 | } | |
eb47b800 JK |
537 | |
538 | if (PageUptodate(page)) | |
539 | return page; | |
540 | ||
541 | if (dn.data_blkaddr == NEW_ADDR) { | |
542 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 543 | SetPageUptodate(page); |
eb47b800 | 544 | } else { |
93dfe2ac JK |
545 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
546 | READ_SYNC); | |
393ff91f | 547 | if (err) |
a8865372 JK |
548 | goto put_err; |
549 | ||
393ff91f | 550 | lock_page(page); |
6bacf52f | 551 | if (unlikely(!PageUptodate(page))) { |
393ff91f | 552 | f2fs_put_page(page, 1); |
a8865372 JK |
553 | err = -EIO; |
554 | goto put_err; | |
eb47b800 | 555 | } |
6bacf52f | 556 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
557 | f2fs_put_page(page, 1); |
558 | goto repeat; | |
eb47b800 JK |
559 | } |
560 | } | |
eb47b800 JK |
561 | |
562 | if (new_i_size && | |
563 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
564 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
565 | /* Only the directory inode sets new_i_size */ |
566 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
567 | mark_inode_dirty_sync(inode); |
568 | } | |
569 | return page; | |
a8865372 JK |
570 | |
571 | put_err: | |
572 | f2fs_put_dnode(&dn); | |
573 | return ERR_PTR(err); | |
eb47b800 JK |
574 | } |
575 | ||
bfad7c2d JK |
576 | static int __allocate_data_block(struct dnode_of_data *dn) |
577 | { | |
578 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
579 | struct f2fs_summary sum; | |
580 | block_t new_blkaddr; | |
581 | struct node_info ni; | |
582 | int type; | |
583 | ||
584 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
585 | return -EPERM; | |
586 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) | |
587 | return -ENOSPC; | |
588 | ||
589 | __set_data_blkaddr(dn, NEW_ADDR); | |
590 | dn->data_blkaddr = NEW_ADDR; | |
591 | ||
592 | get_node_info(sbi, dn->nid, &ni); | |
593 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
594 | ||
595 | type = CURSEG_WARM_DATA; | |
596 | ||
597 | allocate_data_block(sbi, NULL, NULL_ADDR, &new_blkaddr, &sum, type); | |
598 | ||
599 | /* direct IO doesn't use extent cache to maximize the performance */ | |
600 | set_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
601 | update_extent_cache(new_blkaddr, dn); | |
602 | clear_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
603 | ||
604 | dn->data_blkaddr = new_blkaddr; | |
605 | return 0; | |
606 | } | |
607 | ||
0a8165d7 | 608 | /* |
4f4124d0 CY |
609 | * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. |
610 | * If original data blocks are allocated, then give them to blockdev. | |
611 | * Otherwise, | |
612 | * a. preallocate requested block addresses | |
613 | * b. do not use extent cache for better performance | |
614 | * c. give the block addresses to blockdev | |
eb47b800 | 615 | */ |
bfad7c2d | 616 | static int get_data_block(struct inode *inode, sector_t iblock, |
eb47b800 JK |
617 | struct buffer_head *bh_result, int create) |
618 | { | |
bfad7c2d | 619 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
eb47b800 JK |
620 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; |
621 | unsigned maxblocks = bh_result->b_size >> blkbits; | |
622 | struct dnode_of_data dn; | |
bfad7c2d JK |
623 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
624 | pgoff_t pgofs, end_offset; | |
625 | int err = 0, ofs = 1; | |
626 | bool allocated = false; | |
eb47b800 JK |
627 | |
628 | /* Get the page offset from the block offset(iblock) */ | |
629 | pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits)); | |
630 | ||
bfad7c2d JK |
631 | if (check_extent_cache(inode, pgofs, bh_result)) |
632 | goto out; | |
633 | ||
634 | if (create) | |
635 | f2fs_lock_op(sbi); | |
eb47b800 JK |
636 | |
637 | /* When reading holes, we need its node page */ | |
638 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 639 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 640 | if (err) { |
bfad7c2d JK |
641 | if (err == -ENOENT) |
642 | err = 0; | |
643 | goto unlock_out; | |
848753aa | 644 | } |
1ec79083 JK |
645 | if (dn.data_blkaddr == NEW_ADDR) |
646 | goto put_out; | |
eb47b800 | 647 | |
bfad7c2d JK |
648 | if (dn.data_blkaddr != NULL_ADDR) { |
649 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
650 | } else if (create) { | |
651 | err = __allocate_data_block(&dn); | |
652 | if (err) | |
653 | goto put_out; | |
654 | allocated = true; | |
655 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
656 | } else { | |
657 | goto put_out; | |
658 | } | |
659 | ||
660 | end_offset = IS_INODE(dn.node_page) ? | |
661 | ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; | |
662 | bh_result->b_size = (((size_t)1) << blkbits); | |
663 | dn.ofs_in_node++; | |
664 | pgofs++; | |
665 | ||
666 | get_next: | |
667 | if (dn.ofs_in_node >= end_offset) { | |
668 | if (allocated) | |
669 | sync_inode_page(&dn); | |
670 | allocated = false; | |
671 | f2fs_put_dnode(&dn); | |
672 | ||
673 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
674 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 675 | if (err) { |
bfad7c2d JK |
676 | if (err == -ENOENT) |
677 | err = 0; | |
678 | goto unlock_out; | |
679 | } | |
1ec79083 JK |
680 | if (dn.data_blkaddr == NEW_ADDR) |
681 | goto put_out; | |
682 | ||
eb47b800 | 683 | end_offset = IS_INODE(dn.node_page) ? |
bfad7c2d JK |
684 | ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; |
685 | } | |
eb47b800 | 686 | |
bfad7c2d JK |
687 | if (maxblocks > (bh_result->b_size >> blkbits)) { |
688 | block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
689 | if (blkaddr == NULL_ADDR && create) { | |
690 | err = __allocate_data_block(&dn); | |
691 | if (err) | |
692 | goto sync_out; | |
693 | allocated = true; | |
694 | blkaddr = dn.data_blkaddr; | |
695 | } | |
eb47b800 | 696 | /* Give more consecutive addresses for the read ahead */ |
bfad7c2d JK |
697 | if (blkaddr == (bh_result->b_blocknr + ofs)) { |
698 | ofs++; | |
699 | dn.ofs_in_node++; | |
700 | pgofs++; | |
701 | bh_result->b_size += (((size_t)1) << blkbits); | |
702 | goto get_next; | |
703 | } | |
eb47b800 | 704 | } |
bfad7c2d JK |
705 | sync_out: |
706 | if (allocated) | |
707 | sync_inode_page(&dn); | |
708 | put_out: | |
eb47b800 | 709 | f2fs_put_dnode(&dn); |
bfad7c2d JK |
710 | unlock_out: |
711 | if (create) | |
712 | f2fs_unlock_op(sbi); | |
713 | out: | |
714 | trace_f2fs_get_data_block(inode, iblock, bh_result, err); | |
715 | return err; | |
eb47b800 JK |
716 | } |
717 | ||
718 | static int f2fs_read_data_page(struct file *file, struct page *page) | |
719 | { | |
9ffe0fb5 HL |
720 | struct inode *inode = page->mapping->host; |
721 | int ret; | |
722 | ||
723 | /* If the file has inline data, try to read it directlly */ | |
724 | if (f2fs_has_inline_data(inode)) | |
725 | ret = f2fs_read_inline_data(inode, page); | |
726 | else | |
727 | ret = mpage_readpage(page, get_data_block); | |
728 | ||
729 | return ret; | |
eb47b800 JK |
730 | } |
731 | ||
732 | static int f2fs_read_data_pages(struct file *file, | |
733 | struct address_space *mapping, | |
734 | struct list_head *pages, unsigned nr_pages) | |
735 | { | |
9ffe0fb5 HL |
736 | struct inode *inode = file->f_mapping->host; |
737 | ||
738 | /* If the file has inline data, skip readpages */ | |
739 | if (f2fs_has_inline_data(inode)) | |
740 | return 0; | |
741 | ||
bfad7c2d | 742 | return mpage_readpages(mapping, pages, nr_pages, get_data_block); |
eb47b800 JK |
743 | } |
744 | ||
458e6197 | 745 | int do_write_data_page(struct page *page, struct f2fs_io_info *fio) |
eb47b800 JK |
746 | { |
747 | struct inode *inode = page->mapping->host; | |
458e6197 | 748 | block_t old_blkaddr, new_blkaddr; |
eb47b800 JK |
749 | struct dnode_of_data dn; |
750 | int err = 0; | |
751 | ||
752 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 753 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
754 | if (err) |
755 | return err; | |
756 | ||
458e6197 | 757 | old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
758 | |
759 | /* This page is already truncated */ | |
458e6197 | 760 | if (old_blkaddr == NULL_ADDR) |
eb47b800 JK |
761 | goto out_writepage; |
762 | ||
763 | set_page_writeback(page); | |
764 | ||
765 | /* | |
766 | * If current allocation needs SSR, | |
767 | * it had better in-place writes for updated data. | |
768 | */ | |
458e6197 | 769 | if (unlikely(old_blkaddr != NEW_ADDR && |
b25958b6 HL |
770 | !is_cold_data(page) && |
771 | need_inplace_update(inode))) { | |
458e6197 | 772 | rewrite_data_page(page, old_blkaddr, fio); |
eb47b800 | 773 | } else { |
458e6197 JK |
774 | write_data_page(page, &dn, &new_blkaddr, fio); |
775 | update_extent_cache(new_blkaddr, &dn); | |
eb47b800 JK |
776 | } |
777 | out_writepage: | |
778 | f2fs_put_dnode(&dn); | |
779 | return err; | |
780 | } | |
781 | ||
782 | static int f2fs_write_data_page(struct page *page, | |
783 | struct writeback_control *wbc) | |
784 | { | |
785 | struct inode *inode = page->mapping->host; | |
786 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
787 | loff_t i_size = i_size_read(inode); | |
788 | const pgoff_t end_index = ((unsigned long long) i_size) | |
789 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 790 | unsigned offset = 0; |
39936837 | 791 | bool need_balance_fs = false; |
eb47b800 | 792 | int err = 0; |
458e6197 JK |
793 | struct f2fs_io_info fio = { |
794 | .type = DATA, | |
795 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC: WRITE, | |
458e6197 | 796 | }; |
eb47b800 JK |
797 | |
798 | if (page->index < end_index) | |
39936837 | 799 | goto write; |
eb47b800 JK |
800 | |
801 | /* | |
802 | * If the offset is out-of-range of file size, | |
803 | * this page does not have to be written to disk. | |
804 | */ | |
805 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
806 | if ((page->index >= end_index + 1) || !offset) { | |
807 | if (S_ISDIR(inode->i_mode)) { | |
808 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
809 | inode_dec_dirty_dents(inode); | |
810 | } | |
39936837 | 811 | goto out; |
eb47b800 JK |
812 | } |
813 | ||
814 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 815 | write: |
cfb271d4 | 816 | if (unlikely(sbi->por_doing)) { |
39936837 | 817 | err = AOP_WRITEPAGE_ACTIVATE; |
eb47b800 | 818 | goto redirty_out; |
39936837 | 819 | } |
eb47b800 | 820 | |
39936837 | 821 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 JK |
822 | if (S_ISDIR(inode->i_mode)) { |
823 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
824 | inode_dec_dirty_dents(inode); | |
458e6197 | 825 | err = do_write_data_page(page, &fio); |
39936837 | 826 | } else { |
e479556b | 827 | f2fs_lock_op(sbi); |
9ffe0fb5 HL |
828 | |
829 | if (f2fs_has_inline_data(inode) || f2fs_may_inline(inode)) { | |
830 | err = f2fs_write_inline_data(inode, page, offset); | |
831 | f2fs_unlock_op(sbi); | |
832 | goto out; | |
833 | } else { | |
834 | err = do_write_data_page(page, &fio); | |
835 | } | |
836 | ||
e479556b | 837 | f2fs_unlock_op(sbi); |
39936837 | 838 | need_balance_fs = true; |
eb47b800 | 839 | } |
39936837 JK |
840 | if (err == -ENOENT) |
841 | goto out; | |
842 | else if (err) | |
843 | goto redirty_out; | |
eb47b800 | 844 | |
c33ec326 | 845 | if (wbc->for_reclaim) { |
458e6197 | 846 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
c33ec326 JK |
847 | need_balance_fs = false; |
848 | } | |
eb47b800 | 849 | |
eb47b800 | 850 | clear_cold_data(page); |
39936837 | 851 | out: |
eb47b800 | 852 | unlock_page(page); |
39936837 | 853 | if (need_balance_fs) |
eb47b800 JK |
854 | f2fs_balance_fs(sbi); |
855 | return 0; | |
856 | ||
eb47b800 JK |
857 | redirty_out: |
858 | wbc->pages_skipped++; | |
859 | set_page_dirty(page); | |
39936837 | 860 | return err; |
eb47b800 JK |
861 | } |
862 | ||
863 | #define MAX_DESIRED_PAGES_WP 4096 | |
864 | ||
fa9150a8 NJ |
865 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
866 | void *data) | |
867 | { | |
868 | struct address_space *mapping = data; | |
869 | int ret = mapping->a_ops->writepage(page, wbc); | |
870 | mapping_set_error(mapping, ret); | |
871 | return ret; | |
872 | } | |
873 | ||
25ca923b | 874 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
875 | struct writeback_control *wbc) |
876 | { | |
877 | struct inode *inode = mapping->host; | |
878 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
531ad7d5 | 879 | bool locked = false; |
eb47b800 JK |
880 | int ret; |
881 | long excess_nrtw = 0, desired_nrtw; | |
882 | ||
cfb185a1 | 883 | /* deal with chardevs and other special file */ |
884 | if (!mapping->a_ops->writepage) | |
885 | return 0; | |
886 | ||
eb47b800 JK |
887 | if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) { |
888 | desired_nrtw = MAX_DESIRED_PAGES_WP; | |
889 | excess_nrtw = desired_nrtw - wbc->nr_to_write; | |
890 | wbc->nr_to_write = desired_nrtw; | |
891 | } | |
892 | ||
531ad7d5 | 893 | if (!S_ISDIR(inode->i_mode)) { |
eb47b800 | 894 | mutex_lock(&sbi->writepages); |
531ad7d5 JK |
895 | locked = true; |
896 | } | |
fa9150a8 | 897 | ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
531ad7d5 | 898 | if (locked) |
eb47b800 | 899 | mutex_unlock(&sbi->writepages); |
458e6197 JK |
900 | |
901 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
902 | |
903 | remove_dirty_dir_inode(inode); | |
904 | ||
905 | wbc->nr_to_write -= excess_nrtw; | |
906 | return ret; | |
907 | } | |
908 | ||
909 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, | |
910 | loff_t pos, unsigned len, unsigned flags, | |
911 | struct page **pagep, void **fsdata) | |
912 | { | |
913 | struct inode *inode = mapping->host; | |
914 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
915 | struct page *page; | |
916 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; | |
917 | struct dnode_of_data dn; | |
918 | int err = 0; | |
919 | ||
eb47b800 | 920 | f2fs_balance_fs(sbi); |
afcb7ca0 | 921 | repeat: |
9e09fc85 JK |
922 | err = f2fs_convert_inline_data(inode, pos + len); |
923 | if (err) | |
924 | return err; | |
925 | ||
eb47b800 JK |
926 | page = grab_cache_page_write_begin(mapping, index, flags); |
927 | if (!page) | |
928 | return -ENOMEM; | |
929 | *pagep = page; | |
930 | ||
9e09fc85 JK |
931 | if (f2fs_has_inline_data(inode) && (pos + len) <= MAX_INLINE_DATA) |
932 | goto inline_data; | |
9ffe0fb5 | 933 | |
e479556b | 934 | f2fs_lock_op(sbi); |
eb47b800 | 935 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 936 | err = f2fs_reserve_block(&dn, index); |
e479556b | 937 | f2fs_unlock_op(sbi); |
eb47b800 | 938 | |
b600965c HL |
939 | if (err) { |
940 | f2fs_put_page(page, 1); | |
941 | return err; | |
942 | } | |
9ffe0fb5 | 943 | inline_data: |
eb47b800 JK |
944 | if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) |
945 | return 0; | |
946 | ||
947 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
948 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
949 | unsigned end = start + len; | |
950 | ||
951 | /* Reading beyond i_size is simple: memset to zero */ | |
952 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
393ff91f | 953 | goto out; |
eb47b800 JK |
954 | } |
955 | ||
956 | if (dn.data_blkaddr == NEW_ADDR) { | |
957 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
958 | } else { | |
9ffe0fb5 HL |
959 | if (f2fs_has_inline_data(inode)) |
960 | err = f2fs_read_inline_data(inode, page); | |
961 | else | |
962 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, | |
93dfe2ac | 963 | READ_SYNC); |
393ff91f | 964 | if (err) |
eb47b800 | 965 | return err; |
393ff91f | 966 | lock_page(page); |
6bacf52f | 967 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
968 | f2fs_put_page(page, 1); |
969 | return -EIO; | |
eb47b800 | 970 | } |
6bacf52f | 971 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
972 | f2fs_put_page(page, 1); |
973 | goto repeat; | |
eb47b800 JK |
974 | } |
975 | } | |
393ff91f | 976 | out: |
eb47b800 JK |
977 | SetPageUptodate(page); |
978 | clear_cold_data(page); | |
979 | return 0; | |
980 | } | |
981 | ||
a1dd3c13 JK |
982 | static int f2fs_write_end(struct file *file, |
983 | struct address_space *mapping, | |
984 | loff_t pos, unsigned len, unsigned copied, | |
985 | struct page *page, void *fsdata) | |
986 | { | |
987 | struct inode *inode = page->mapping->host; | |
988 | ||
989 | SetPageUptodate(page); | |
990 | set_page_dirty(page); | |
991 | ||
992 | if (pos + copied > i_size_read(inode)) { | |
993 | i_size_write(inode, pos + copied); | |
994 | mark_inode_dirty(inode); | |
995 | update_inode_page(inode); | |
996 | } | |
997 | ||
75c3c8bc | 998 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
999 | return copied; |
1000 | } | |
1001 | ||
944fcfc1 JK |
1002 | static int check_direct_IO(struct inode *inode, int rw, |
1003 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
1004 | { | |
1005 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
1006 | int i; | |
1007 | ||
1008 | if (rw == READ) | |
1009 | return 0; | |
1010 | ||
1011 | if (offset & blocksize_mask) | |
1012 | return -EINVAL; | |
1013 | ||
1014 | for (i = 0; i < nr_segs; i++) | |
1015 | if (iov[i].iov_len & blocksize_mask) | |
1016 | return -EINVAL; | |
1017 | return 0; | |
1018 | } | |
1019 | ||
eb47b800 JK |
1020 | static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, |
1021 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
1022 | { | |
1023 | struct file *file = iocb->ki_filp; | |
1024 | struct inode *inode = file->f_mapping->host; | |
944fcfc1 | 1025 | |
9ffe0fb5 HL |
1026 | /* Let buffer I/O handle the inline data case. */ |
1027 | if (f2fs_has_inline_data(inode)) | |
1028 | return 0; | |
1029 | ||
944fcfc1 JK |
1030 | if (check_direct_IO(inode, rw, iov, offset, nr_segs)) |
1031 | return 0; | |
1032 | ||
eb47b800 | 1033 | return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, |
bfad7c2d | 1034 | get_data_block); |
eb47b800 JK |
1035 | } |
1036 | ||
d47992f8 LC |
1037 | static void f2fs_invalidate_data_page(struct page *page, unsigned int offset, |
1038 | unsigned int length) | |
eb47b800 JK |
1039 | { |
1040 | struct inode *inode = page->mapping->host; | |
1041 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
1042 | if (S_ISDIR(inode->i_mode) && PageDirty(page)) { | |
1043 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
1044 | inode_dec_dirty_dents(inode); | |
1045 | } | |
1046 | ClearPagePrivate(page); | |
1047 | } | |
1048 | ||
1049 | static int f2fs_release_data_page(struct page *page, gfp_t wait) | |
1050 | { | |
1051 | ClearPagePrivate(page); | |
c3850aa1 | 1052 | return 1; |
eb47b800 JK |
1053 | } |
1054 | ||
1055 | static int f2fs_set_data_page_dirty(struct page *page) | |
1056 | { | |
1057 | struct address_space *mapping = page->mapping; | |
1058 | struct inode *inode = mapping->host; | |
1059 | ||
26c6b887 JK |
1060 | trace_f2fs_set_page_dirty(page, DATA); |
1061 | ||
eb47b800 JK |
1062 | SetPageUptodate(page); |
1063 | if (!PageDirty(page)) { | |
1064 | __set_page_dirty_nobuffers(page); | |
1065 | set_dirty_dir_page(inode, page); | |
1066 | return 1; | |
1067 | } | |
1068 | return 0; | |
1069 | } | |
1070 | ||
c01e54b7 JK |
1071 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1072 | { | |
bfad7c2d | 1073 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1074 | } |
1075 | ||
eb47b800 JK |
1076 | const struct address_space_operations f2fs_dblock_aops = { |
1077 | .readpage = f2fs_read_data_page, | |
1078 | .readpages = f2fs_read_data_pages, | |
1079 | .writepage = f2fs_write_data_page, | |
1080 | .writepages = f2fs_write_data_pages, | |
1081 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1082 | .write_end = f2fs_write_end, |
eb47b800 JK |
1083 | .set_page_dirty = f2fs_set_data_page_dirty, |
1084 | .invalidatepage = f2fs_invalidate_data_page, | |
1085 | .releasepage = f2fs_release_data_page, | |
1086 | .direct_IO = f2fs_direct_IO, | |
c01e54b7 | 1087 | .bmap = f2fs_bmap, |
eb47b800 | 1088 | }; |