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 | ||
a569469e | 229 | f2fs_wait_on_page_writeback(node_page, NODE, false); |
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 | ||
261 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
262 | if (err) | |
263 | return err; | |
264 | if (dn->data_blkaddr == NULL_ADDR) | |
265 | err = reserve_new_block(dn); | |
266 | ||
267 | if (need_put) | |
268 | f2fs_put_dnode(dn); | |
269 | return err; | |
270 | } | |
271 | ||
eb47b800 JK |
272 | static int check_extent_cache(struct inode *inode, pgoff_t pgofs, |
273 | struct buffer_head *bh_result) | |
274 | { | |
275 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
eb47b800 JK |
276 | pgoff_t start_fofs, end_fofs; |
277 | block_t start_blkaddr; | |
278 | ||
c11abd1a JK |
279 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
280 | return 0; | |
281 | ||
eb47b800 JK |
282 | read_lock(&fi->ext.ext_lock); |
283 | if (fi->ext.len == 0) { | |
284 | read_unlock(&fi->ext.ext_lock); | |
285 | return 0; | |
286 | } | |
287 | ||
dcdfff65 JK |
288 | stat_inc_total_hit(inode->i_sb); |
289 | ||
eb47b800 JK |
290 | start_fofs = fi->ext.fofs; |
291 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
292 | start_blkaddr = fi->ext.blk_addr; | |
293 | ||
294 | if (pgofs >= start_fofs && pgofs <= end_fofs) { | |
295 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; | |
296 | size_t count; | |
297 | ||
298 | clear_buffer_new(bh_result); | |
299 | map_bh(bh_result, inode->i_sb, | |
300 | start_blkaddr + pgofs - start_fofs); | |
301 | count = end_fofs - pgofs + 1; | |
302 | if (count < (UINT_MAX >> blkbits)) | |
303 | bh_result->b_size = (count << blkbits); | |
304 | else | |
305 | bh_result->b_size = UINT_MAX; | |
306 | ||
dcdfff65 | 307 | stat_inc_read_hit(inode->i_sb); |
eb47b800 JK |
308 | read_unlock(&fi->ext.ext_lock); |
309 | return 1; | |
310 | } | |
311 | read_unlock(&fi->ext.ext_lock); | |
312 | return 0; | |
313 | } | |
314 | ||
315 | void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) | |
316 | { | |
317 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); | |
318 | pgoff_t fofs, start_fofs, end_fofs; | |
319 | block_t start_blkaddr, end_blkaddr; | |
c11abd1a | 320 | int need_update = true; |
eb47b800 | 321 | |
5d56b671 | 322 | f2fs_bug_on(blk_addr == NEW_ADDR); |
de93653f JK |
323 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + |
324 | dn->ofs_in_node; | |
eb47b800 JK |
325 | |
326 | /* Update the page address in the parent node */ | |
327 | __set_data_blkaddr(dn, blk_addr); | |
328 | ||
c11abd1a JK |
329 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
330 | return; | |
331 | ||
eb47b800 JK |
332 | write_lock(&fi->ext.ext_lock); |
333 | ||
334 | start_fofs = fi->ext.fofs; | |
335 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
336 | start_blkaddr = fi->ext.blk_addr; | |
337 | end_blkaddr = fi->ext.blk_addr + fi->ext.len - 1; | |
338 | ||
339 | /* Drop and initialize the matched extent */ | |
340 | if (fi->ext.len == 1 && fofs == start_fofs) | |
341 | fi->ext.len = 0; | |
342 | ||
343 | /* Initial extent */ | |
344 | if (fi->ext.len == 0) { | |
345 | if (blk_addr != NULL_ADDR) { | |
346 | fi->ext.fofs = fofs; | |
347 | fi->ext.blk_addr = blk_addr; | |
348 | fi->ext.len = 1; | |
349 | } | |
350 | goto end_update; | |
351 | } | |
352 | ||
6224da87 | 353 | /* Front merge */ |
eb47b800 JK |
354 | if (fofs == start_fofs - 1 && blk_addr == start_blkaddr - 1) { |
355 | fi->ext.fofs--; | |
356 | fi->ext.blk_addr--; | |
357 | fi->ext.len++; | |
358 | goto end_update; | |
359 | } | |
360 | ||
361 | /* Back merge */ | |
362 | if (fofs == end_fofs + 1 && blk_addr == end_blkaddr + 1) { | |
363 | fi->ext.len++; | |
364 | goto end_update; | |
365 | } | |
366 | ||
367 | /* Split the existing extent */ | |
368 | if (fi->ext.len > 1 && | |
369 | fofs >= start_fofs && fofs <= end_fofs) { | |
370 | if ((end_fofs - fofs) < (fi->ext.len >> 1)) { | |
371 | fi->ext.len = fofs - start_fofs; | |
372 | } else { | |
373 | fi->ext.fofs = fofs + 1; | |
374 | fi->ext.blk_addr = start_blkaddr + | |
375 | fofs - start_fofs + 1; | |
376 | fi->ext.len -= fofs - start_fofs + 1; | |
377 | } | |
c11abd1a JK |
378 | } else { |
379 | need_update = false; | |
eb47b800 | 380 | } |
eb47b800 | 381 | |
c11abd1a JK |
382 | /* Finally, if the extent is very fragmented, let's drop the cache. */ |
383 | if (fi->ext.len < F2FS_MIN_EXTENT_LEN) { | |
384 | fi->ext.len = 0; | |
385 | set_inode_flag(fi, FI_NO_EXTENT); | |
386 | need_update = true; | |
387 | } | |
eb47b800 JK |
388 | end_update: |
389 | write_unlock(&fi->ext.ext_lock); | |
c11abd1a JK |
390 | if (need_update) |
391 | sync_inode_page(dn); | |
392 | return; | |
eb47b800 JK |
393 | } |
394 | ||
c718379b | 395 | struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) |
eb47b800 JK |
396 | { |
397 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
398 | struct address_space *mapping = inode->i_mapping; | |
399 | struct dnode_of_data dn; | |
400 | struct page *page; | |
401 | int err; | |
402 | ||
403 | page = find_get_page(mapping, index); | |
404 | if (page && PageUptodate(page)) | |
405 | return page; | |
406 | f2fs_put_page(page, 0); | |
407 | ||
408 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 409 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
eb47b800 JK |
410 | if (err) |
411 | return ERR_PTR(err); | |
412 | f2fs_put_dnode(&dn); | |
413 | ||
414 | if (dn.data_blkaddr == NULL_ADDR) | |
415 | return ERR_PTR(-ENOENT); | |
416 | ||
417 | /* By fallocate(), there is no cached page, but with NEW_ADDR */ | |
6bacf52f | 418 | if (unlikely(dn.data_blkaddr == NEW_ADDR)) |
eb47b800 JK |
419 | return ERR_PTR(-EINVAL); |
420 | ||
6f85b352 | 421 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
eb47b800 JK |
422 | if (!page) |
423 | return ERR_PTR(-ENOMEM); | |
424 | ||
393ff91f JK |
425 | if (PageUptodate(page)) { |
426 | unlock_page(page); | |
427 | return page; | |
428 | } | |
429 | ||
93dfe2ac | 430 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
c718379b | 431 | sync ? READ_SYNC : READA); |
1069bbf7 CY |
432 | if (err) |
433 | return ERR_PTR(err); | |
434 | ||
c718379b JK |
435 | if (sync) { |
436 | wait_on_page_locked(page); | |
6bacf52f | 437 | if (unlikely(!PageUptodate(page))) { |
c718379b JK |
438 | f2fs_put_page(page, 0); |
439 | return ERR_PTR(-EIO); | |
440 | } | |
eb47b800 | 441 | } |
eb47b800 JK |
442 | return page; |
443 | } | |
444 | ||
0a8165d7 | 445 | /* |
eb47b800 JK |
446 | * If it tries to access a hole, return an error. |
447 | * Because, the callers, functions in dir.c and GC, should be able to know | |
448 | * whether this page exists or not. | |
449 | */ | |
450 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index) | |
451 | { | |
452 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
453 | struct address_space *mapping = inode->i_mapping; | |
454 | struct dnode_of_data dn; | |
455 | struct page *page; | |
456 | int err; | |
457 | ||
650495de | 458 | repeat: |
6f85b352 | 459 | page = grab_cache_page_write_begin(mapping, index, AOP_FLAG_NOFS); |
650495de JK |
460 | if (!page) |
461 | return ERR_PTR(-ENOMEM); | |
462 | ||
eb47b800 | 463 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 464 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
650495de JK |
465 | if (err) { |
466 | f2fs_put_page(page, 1); | |
eb47b800 | 467 | return ERR_PTR(err); |
650495de | 468 | } |
eb47b800 JK |
469 | f2fs_put_dnode(&dn); |
470 | ||
6bacf52f | 471 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
650495de | 472 | f2fs_put_page(page, 1); |
eb47b800 | 473 | return ERR_PTR(-ENOENT); |
650495de | 474 | } |
eb47b800 JK |
475 | |
476 | if (PageUptodate(page)) | |
477 | return page; | |
478 | ||
d59ff4df JK |
479 | /* |
480 | * A new dentry page is allocated but not able to be written, since its | |
481 | * new inode page couldn't be allocated due to -ENOSPC. | |
482 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
483 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
484 | */ | |
485 | if (dn.data_blkaddr == NEW_ADDR) { | |
486 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
487 | SetPageUptodate(page); | |
488 | return page; | |
489 | } | |
eb47b800 | 490 | |
93dfe2ac | 491 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, READ_SYNC); |
393ff91f | 492 | if (err) |
eb47b800 | 493 | return ERR_PTR(err); |
393ff91f JK |
494 | |
495 | lock_page(page); | |
6bacf52f | 496 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
497 | f2fs_put_page(page, 1); |
498 | return ERR_PTR(-EIO); | |
eb47b800 | 499 | } |
6bacf52f | 500 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
501 | f2fs_put_page(page, 1); |
502 | goto repeat; | |
eb47b800 JK |
503 | } |
504 | return page; | |
505 | } | |
506 | ||
0a8165d7 | 507 | /* |
eb47b800 JK |
508 | * Caller ensures that this data page is never allocated. |
509 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 510 | * |
4f4124d0 CY |
511 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
512 | * f2fs_unlock_op(). | |
44a83ff6 | 513 | * Note that, npage is set only by make_empty_dir. |
eb47b800 | 514 | */ |
64aa7ed9 JK |
515 | struct page *get_new_data_page(struct inode *inode, |
516 | struct page *npage, pgoff_t index, bool new_i_size) | |
eb47b800 JK |
517 | { |
518 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
519 | struct address_space *mapping = inode->i_mapping; | |
520 | struct page *page; | |
521 | struct dnode_of_data dn; | |
522 | int err; | |
523 | ||
64aa7ed9 | 524 | set_new_dnode(&dn, inode, npage, npage, 0); |
b600965c | 525 | err = f2fs_reserve_block(&dn, index); |
eb47b800 JK |
526 | if (err) |
527 | return ERR_PTR(err); | |
afcb7ca0 | 528 | repeat: |
eb47b800 JK |
529 | page = grab_cache_page(mapping, index); |
530 | if (!page) | |
531 | return ERR_PTR(-ENOMEM); | |
532 | ||
533 | if (PageUptodate(page)) | |
534 | return page; | |
535 | ||
536 | if (dn.data_blkaddr == NEW_ADDR) { | |
537 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 538 | SetPageUptodate(page); |
eb47b800 | 539 | } else { |
93dfe2ac JK |
540 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, |
541 | READ_SYNC); | |
393ff91f | 542 | if (err) |
eb47b800 | 543 | return ERR_PTR(err); |
393ff91f | 544 | lock_page(page); |
6bacf52f | 545 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
546 | f2fs_put_page(page, 1); |
547 | return ERR_PTR(-EIO); | |
eb47b800 | 548 | } |
6bacf52f | 549 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
550 | f2fs_put_page(page, 1); |
551 | goto repeat; | |
eb47b800 JK |
552 | } |
553 | } | |
eb47b800 JK |
554 | |
555 | if (new_i_size && | |
556 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
557 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
558 | /* Only the directory inode sets new_i_size */ |
559 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
560 | mark_inode_dirty_sync(inode); |
561 | } | |
562 | return page; | |
563 | } | |
564 | ||
bfad7c2d JK |
565 | static int __allocate_data_block(struct dnode_of_data *dn) |
566 | { | |
567 | struct f2fs_sb_info *sbi = F2FS_SB(dn->inode->i_sb); | |
568 | struct f2fs_summary sum; | |
569 | block_t new_blkaddr; | |
570 | struct node_info ni; | |
571 | int type; | |
572 | ||
573 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
574 | return -EPERM; | |
575 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) | |
576 | return -ENOSPC; | |
577 | ||
578 | __set_data_blkaddr(dn, NEW_ADDR); | |
579 | dn->data_blkaddr = NEW_ADDR; | |
580 | ||
581 | get_node_info(sbi, dn->nid, &ni); | |
582 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
583 | ||
584 | type = CURSEG_WARM_DATA; | |
585 | ||
586 | allocate_data_block(sbi, NULL, NULL_ADDR, &new_blkaddr, &sum, type); | |
587 | ||
588 | /* direct IO doesn't use extent cache to maximize the performance */ | |
589 | set_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
590 | update_extent_cache(new_blkaddr, dn); | |
591 | clear_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
592 | ||
593 | dn->data_blkaddr = new_blkaddr; | |
594 | return 0; | |
595 | } | |
596 | ||
0a8165d7 | 597 | /* |
4f4124d0 CY |
598 | * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. |
599 | * If original data blocks are allocated, then give them to blockdev. | |
600 | * Otherwise, | |
601 | * a. preallocate requested block addresses | |
602 | * b. do not use extent cache for better performance | |
603 | * c. give the block addresses to blockdev | |
eb47b800 | 604 | */ |
bfad7c2d | 605 | static int get_data_block(struct inode *inode, sector_t iblock, |
eb47b800 JK |
606 | struct buffer_head *bh_result, int create) |
607 | { | |
bfad7c2d | 608 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); |
eb47b800 JK |
609 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; |
610 | unsigned maxblocks = bh_result->b_size >> blkbits; | |
611 | struct dnode_of_data dn; | |
bfad7c2d JK |
612 | int mode = create ? ALLOC_NODE : LOOKUP_NODE_RA; |
613 | pgoff_t pgofs, end_offset; | |
614 | int err = 0, ofs = 1; | |
615 | bool allocated = false; | |
eb47b800 JK |
616 | |
617 | /* Get the page offset from the block offset(iblock) */ | |
618 | pgofs = (pgoff_t)(iblock >> (PAGE_CACHE_SHIFT - blkbits)); | |
619 | ||
bfad7c2d JK |
620 | if (check_extent_cache(inode, pgofs, bh_result)) |
621 | goto out; | |
622 | ||
623 | if (create) | |
624 | f2fs_lock_op(sbi); | |
eb47b800 JK |
625 | |
626 | /* When reading holes, we need its node page */ | |
627 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 628 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 629 | if (err) { |
bfad7c2d JK |
630 | if (err == -ENOENT) |
631 | err = 0; | |
632 | goto unlock_out; | |
848753aa | 633 | } |
1ec79083 JK |
634 | if (dn.data_blkaddr == NEW_ADDR) |
635 | goto put_out; | |
eb47b800 | 636 | |
bfad7c2d JK |
637 | if (dn.data_blkaddr != NULL_ADDR) { |
638 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
639 | } else if (create) { | |
640 | err = __allocate_data_block(&dn); | |
641 | if (err) | |
642 | goto put_out; | |
643 | allocated = true; | |
644 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
645 | } else { | |
646 | goto put_out; | |
647 | } | |
648 | ||
649 | end_offset = IS_INODE(dn.node_page) ? | |
650 | ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; | |
651 | bh_result->b_size = (((size_t)1) << blkbits); | |
652 | dn.ofs_in_node++; | |
653 | pgofs++; | |
654 | ||
655 | get_next: | |
656 | if (dn.ofs_in_node >= end_offset) { | |
657 | if (allocated) | |
658 | sync_inode_page(&dn); | |
659 | allocated = false; | |
660 | f2fs_put_dnode(&dn); | |
661 | ||
662 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
663 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 664 | if (err) { |
bfad7c2d JK |
665 | if (err == -ENOENT) |
666 | err = 0; | |
667 | goto unlock_out; | |
668 | } | |
1ec79083 JK |
669 | if (dn.data_blkaddr == NEW_ADDR) |
670 | goto put_out; | |
671 | ||
eb47b800 | 672 | end_offset = IS_INODE(dn.node_page) ? |
bfad7c2d JK |
673 | ADDRS_PER_INODE(F2FS_I(inode)) : ADDRS_PER_BLOCK; |
674 | } | |
eb47b800 | 675 | |
bfad7c2d JK |
676 | if (maxblocks > (bh_result->b_size >> blkbits)) { |
677 | block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
678 | if (blkaddr == NULL_ADDR && create) { | |
679 | err = __allocate_data_block(&dn); | |
680 | if (err) | |
681 | goto sync_out; | |
682 | allocated = true; | |
683 | blkaddr = dn.data_blkaddr; | |
684 | } | |
eb47b800 | 685 | /* Give more consecutive addresses for the read ahead */ |
bfad7c2d JK |
686 | if (blkaddr == (bh_result->b_blocknr + ofs)) { |
687 | ofs++; | |
688 | dn.ofs_in_node++; | |
689 | pgofs++; | |
690 | bh_result->b_size += (((size_t)1) << blkbits); | |
691 | goto get_next; | |
692 | } | |
eb47b800 | 693 | } |
bfad7c2d JK |
694 | sync_out: |
695 | if (allocated) | |
696 | sync_inode_page(&dn); | |
697 | put_out: | |
eb47b800 | 698 | f2fs_put_dnode(&dn); |
bfad7c2d JK |
699 | unlock_out: |
700 | if (create) | |
701 | f2fs_unlock_op(sbi); | |
702 | out: | |
703 | trace_f2fs_get_data_block(inode, iblock, bh_result, err); | |
704 | return err; | |
eb47b800 JK |
705 | } |
706 | ||
707 | static int f2fs_read_data_page(struct file *file, struct page *page) | |
708 | { | |
9ffe0fb5 HL |
709 | struct inode *inode = page->mapping->host; |
710 | int ret; | |
711 | ||
712 | /* If the file has inline data, try to read it directlly */ | |
713 | if (f2fs_has_inline_data(inode)) | |
714 | ret = f2fs_read_inline_data(inode, page); | |
715 | else | |
716 | ret = mpage_readpage(page, get_data_block); | |
717 | ||
718 | return ret; | |
eb47b800 JK |
719 | } |
720 | ||
721 | static int f2fs_read_data_pages(struct file *file, | |
722 | struct address_space *mapping, | |
723 | struct list_head *pages, unsigned nr_pages) | |
724 | { | |
9ffe0fb5 HL |
725 | struct inode *inode = file->f_mapping->host; |
726 | ||
727 | /* If the file has inline data, skip readpages */ | |
728 | if (f2fs_has_inline_data(inode)) | |
729 | return 0; | |
730 | ||
bfad7c2d | 731 | return mpage_readpages(mapping, pages, nr_pages, get_data_block); |
eb47b800 JK |
732 | } |
733 | ||
458e6197 | 734 | int do_write_data_page(struct page *page, struct f2fs_io_info *fio) |
eb47b800 JK |
735 | { |
736 | struct inode *inode = page->mapping->host; | |
458e6197 | 737 | block_t old_blkaddr, new_blkaddr; |
eb47b800 JK |
738 | struct dnode_of_data dn; |
739 | int err = 0; | |
740 | ||
741 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 742 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
743 | if (err) |
744 | return err; | |
745 | ||
458e6197 | 746 | old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
747 | |
748 | /* This page is already truncated */ | |
458e6197 | 749 | if (old_blkaddr == NULL_ADDR) |
eb47b800 JK |
750 | goto out_writepage; |
751 | ||
752 | set_page_writeback(page); | |
753 | ||
754 | /* | |
755 | * If current allocation needs SSR, | |
756 | * it had better in-place writes for updated data. | |
757 | */ | |
458e6197 | 758 | if (unlikely(old_blkaddr != NEW_ADDR && |
b25958b6 HL |
759 | !is_cold_data(page) && |
760 | need_inplace_update(inode))) { | |
458e6197 | 761 | rewrite_data_page(page, old_blkaddr, fio); |
eb47b800 | 762 | } else { |
458e6197 JK |
763 | write_data_page(page, &dn, &new_blkaddr, fio); |
764 | update_extent_cache(new_blkaddr, &dn); | |
eb47b800 JK |
765 | } |
766 | out_writepage: | |
767 | f2fs_put_dnode(&dn); | |
768 | return err; | |
769 | } | |
770 | ||
771 | static int f2fs_write_data_page(struct page *page, | |
772 | struct writeback_control *wbc) | |
773 | { | |
774 | struct inode *inode = page->mapping->host; | |
775 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
776 | loff_t i_size = i_size_read(inode); | |
777 | const pgoff_t end_index = ((unsigned long long) i_size) | |
778 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 779 | unsigned offset = 0; |
39936837 | 780 | bool need_balance_fs = false; |
eb47b800 | 781 | int err = 0; |
458e6197 JK |
782 | struct f2fs_io_info fio = { |
783 | .type = DATA, | |
784 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC: WRITE, | |
458e6197 | 785 | }; |
eb47b800 JK |
786 | |
787 | if (page->index < end_index) | |
39936837 | 788 | goto write; |
eb47b800 JK |
789 | |
790 | /* | |
791 | * If the offset is out-of-range of file size, | |
792 | * this page does not have to be written to disk. | |
793 | */ | |
794 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
795 | if ((page->index >= end_index + 1) || !offset) { | |
796 | if (S_ISDIR(inode->i_mode)) { | |
797 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
798 | inode_dec_dirty_dents(inode); | |
799 | } | |
39936837 | 800 | goto out; |
eb47b800 JK |
801 | } |
802 | ||
803 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 804 | write: |
cfb271d4 | 805 | if (unlikely(sbi->por_doing)) { |
39936837 | 806 | err = AOP_WRITEPAGE_ACTIVATE; |
eb47b800 | 807 | goto redirty_out; |
39936837 | 808 | } |
eb47b800 | 809 | |
39936837 | 810 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 JK |
811 | if (S_ISDIR(inode->i_mode)) { |
812 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
813 | inode_dec_dirty_dents(inode); | |
458e6197 | 814 | err = do_write_data_page(page, &fio); |
39936837 | 815 | } else { |
e479556b | 816 | f2fs_lock_op(sbi); |
9ffe0fb5 HL |
817 | |
818 | if (f2fs_has_inline_data(inode) || f2fs_may_inline(inode)) { | |
819 | err = f2fs_write_inline_data(inode, page, offset); | |
820 | f2fs_unlock_op(sbi); | |
821 | goto out; | |
822 | } else { | |
823 | err = do_write_data_page(page, &fio); | |
824 | } | |
825 | ||
e479556b | 826 | f2fs_unlock_op(sbi); |
39936837 | 827 | need_balance_fs = true; |
eb47b800 | 828 | } |
39936837 JK |
829 | if (err == -ENOENT) |
830 | goto out; | |
831 | else if (err) | |
832 | goto redirty_out; | |
eb47b800 JK |
833 | |
834 | if (wbc->for_reclaim) | |
458e6197 | 835 | f2fs_submit_merged_bio(sbi, DATA, WRITE); |
eb47b800 | 836 | |
eb47b800 | 837 | clear_cold_data(page); |
39936837 | 838 | out: |
eb47b800 | 839 | unlock_page(page); |
39936837 | 840 | if (need_balance_fs) |
eb47b800 JK |
841 | f2fs_balance_fs(sbi); |
842 | return 0; | |
843 | ||
eb47b800 JK |
844 | redirty_out: |
845 | wbc->pages_skipped++; | |
846 | set_page_dirty(page); | |
39936837 | 847 | return err; |
eb47b800 JK |
848 | } |
849 | ||
850 | #define MAX_DESIRED_PAGES_WP 4096 | |
851 | ||
fa9150a8 NJ |
852 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
853 | void *data) | |
854 | { | |
855 | struct address_space *mapping = data; | |
856 | int ret = mapping->a_ops->writepage(page, wbc); | |
857 | mapping_set_error(mapping, ret); | |
858 | return ret; | |
859 | } | |
860 | ||
25ca923b | 861 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
862 | struct writeback_control *wbc) |
863 | { | |
864 | struct inode *inode = mapping->host; | |
865 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
531ad7d5 | 866 | bool locked = false; |
eb47b800 JK |
867 | int ret; |
868 | long excess_nrtw = 0, desired_nrtw; | |
869 | ||
cfb185a1 | 870 | /* deal with chardevs and other special file */ |
871 | if (!mapping->a_ops->writepage) | |
872 | return 0; | |
873 | ||
eb47b800 JK |
874 | if (wbc->nr_to_write < MAX_DESIRED_PAGES_WP) { |
875 | desired_nrtw = MAX_DESIRED_PAGES_WP; | |
876 | excess_nrtw = desired_nrtw - wbc->nr_to_write; | |
877 | wbc->nr_to_write = desired_nrtw; | |
878 | } | |
879 | ||
531ad7d5 | 880 | if (!S_ISDIR(inode->i_mode)) { |
eb47b800 | 881 | mutex_lock(&sbi->writepages); |
531ad7d5 JK |
882 | locked = true; |
883 | } | |
fa9150a8 | 884 | ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
531ad7d5 | 885 | if (locked) |
eb47b800 | 886 | mutex_unlock(&sbi->writepages); |
458e6197 JK |
887 | |
888 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
889 | |
890 | remove_dirty_dir_inode(inode); | |
891 | ||
892 | wbc->nr_to_write -= excess_nrtw; | |
893 | return ret; | |
894 | } | |
895 | ||
896 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, | |
897 | loff_t pos, unsigned len, unsigned flags, | |
898 | struct page **pagep, void **fsdata) | |
899 | { | |
900 | struct inode *inode = mapping->host; | |
901 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
902 | struct page *page; | |
903 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; | |
904 | struct dnode_of_data dn; | |
905 | int err = 0; | |
906 | ||
eb47b800 | 907 | f2fs_balance_fs(sbi); |
afcb7ca0 | 908 | repeat: |
9e09fc85 JK |
909 | err = f2fs_convert_inline_data(inode, pos + len); |
910 | if (err) | |
911 | return err; | |
912 | ||
eb47b800 JK |
913 | page = grab_cache_page_write_begin(mapping, index, flags); |
914 | if (!page) | |
915 | return -ENOMEM; | |
916 | *pagep = page; | |
917 | ||
9e09fc85 JK |
918 | if (f2fs_has_inline_data(inode) && (pos + len) <= MAX_INLINE_DATA) |
919 | goto inline_data; | |
9ffe0fb5 | 920 | |
e479556b | 921 | f2fs_lock_op(sbi); |
eb47b800 | 922 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
b600965c | 923 | err = f2fs_reserve_block(&dn, index); |
e479556b | 924 | f2fs_unlock_op(sbi); |
eb47b800 | 925 | |
b600965c HL |
926 | if (err) { |
927 | f2fs_put_page(page, 1); | |
928 | return err; | |
929 | } | |
9ffe0fb5 | 930 | inline_data: |
eb47b800 JK |
931 | if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) |
932 | return 0; | |
933 | ||
934 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { | |
935 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
936 | unsigned end = start + len; | |
937 | ||
938 | /* Reading beyond i_size is simple: memset to zero */ | |
939 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
393ff91f | 940 | goto out; |
eb47b800 JK |
941 | } |
942 | ||
943 | if (dn.data_blkaddr == NEW_ADDR) { | |
944 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
945 | } else { | |
9ffe0fb5 HL |
946 | if (f2fs_has_inline_data(inode)) |
947 | err = f2fs_read_inline_data(inode, page); | |
948 | else | |
949 | err = f2fs_submit_page_bio(sbi, page, dn.data_blkaddr, | |
93dfe2ac | 950 | READ_SYNC); |
393ff91f | 951 | if (err) |
eb47b800 | 952 | return err; |
393ff91f | 953 | lock_page(page); |
6bacf52f | 954 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
955 | f2fs_put_page(page, 1); |
956 | return -EIO; | |
eb47b800 | 957 | } |
6bacf52f | 958 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
959 | f2fs_put_page(page, 1); |
960 | goto repeat; | |
eb47b800 JK |
961 | } |
962 | } | |
393ff91f | 963 | out: |
eb47b800 JK |
964 | SetPageUptodate(page); |
965 | clear_cold_data(page); | |
966 | return 0; | |
967 | } | |
968 | ||
a1dd3c13 JK |
969 | static int f2fs_write_end(struct file *file, |
970 | struct address_space *mapping, | |
971 | loff_t pos, unsigned len, unsigned copied, | |
972 | struct page *page, void *fsdata) | |
973 | { | |
974 | struct inode *inode = page->mapping->host; | |
975 | ||
976 | SetPageUptodate(page); | |
977 | set_page_dirty(page); | |
978 | ||
979 | if (pos + copied > i_size_read(inode)) { | |
980 | i_size_write(inode, pos + copied); | |
981 | mark_inode_dirty(inode); | |
982 | update_inode_page(inode); | |
983 | } | |
984 | ||
75c3c8bc | 985 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
986 | return copied; |
987 | } | |
988 | ||
944fcfc1 JK |
989 | static int check_direct_IO(struct inode *inode, int rw, |
990 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
991 | { | |
992 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
993 | int i; | |
994 | ||
995 | if (rw == READ) | |
996 | return 0; | |
997 | ||
998 | if (offset & blocksize_mask) | |
999 | return -EINVAL; | |
1000 | ||
1001 | for (i = 0; i < nr_segs; i++) | |
1002 | if (iov[i].iov_len & blocksize_mask) | |
1003 | return -EINVAL; | |
1004 | return 0; | |
1005 | } | |
1006 | ||
eb47b800 JK |
1007 | static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, |
1008 | const struct iovec *iov, loff_t offset, unsigned long nr_segs) | |
1009 | { | |
1010 | struct file *file = iocb->ki_filp; | |
1011 | struct inode *inode = file->f_mapping->host; | |
944fcfc1 | 1012 | |
9ffe0fb5 HL |
1013 | /* Let buffer I/O handle the inline data case. */ |
1014 | if (f2fs_has_inline_data(inode)) | |
1015 | return 0; | |
1016 | ||
944fcfc1 JK |
1017 | if (check_direct_IO(inode, rw, iov, offset, nr_segs)) |
1018 | return 0; | |
1019 | ||
eb47b800 | 1020 | return blockdev_direct_IO(rw, iocb, inode, iov, offset, nr_segs, |
bfad7c2d | 1021 | get_data_block); |
eb47b800 JK |
1022 | } |
1023 | ||
d47992f8 LC |
1024 | static void f2fs_invalidate_data_page(struct page *page, unsigned int offset, |
1025 | unsigned int length) | |
eb47b800 JK |
1026 | { |
1027 | struct inode *inode = page->mapping->host; | |
1028 | struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); | |
1029 | if (S_ISDIR(inode->i_mode) && PageDirty(page)) { | |
1030 | dec_page_count(sbi, F2FS_DIRTY_DENTS); | |
1031 | inode_dec_dirty_dents(inode); | |
1032 | } | |
1033 | ClearPagePrivate(page); | |
1034 | } | |
1035 | ||
1036 | static int f2fs_release_data_page(struct page *page, gfp_t wait) | |
1037 | { | |
1038 | ClearPagePrivate(page); | |
c3850aa1 | 1039 | return 1; |
eb47b800 JK |
1040 | } |
1041 | ||
1042 | static int f2fs_set_data_page_dirty(struct page *page) | |
1043 | { | |
1044 | struct address_space *mapping = page->mapping; | |
1045 | struct inode *inode = mapping->host; | |
1046 | ||
26c6b887 JK |
1047 | trace_f2fs_set_page_dirty(page, DATA); |
1048 | ||
eb47b800 JK |
1049 | SetPageUptodate(page); |
1050 | if (!PageDirty(page)) { | |
1051 | __set_page_dirty_nobuffers(page); | |
1052 | set_dirty_dir_page(inode, page); | |
1053 | return 1; | |
1054 | } | |
1055 | return 0; | |
1056 | } | |
1057 | ||
c01e54b7 JK |
1058 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1059 | { | |
bfad7c2d | 1060 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1061 | } |
1062 | ||
eb47b800 JK |
1063 | const struct address_space_operations f2fs_dblock_aops = { |
1064 | .readpage = f2fs_read_data_page, | |
1065 | .readpages = f2fs_read_data_pages, | |
1066 | .writepage = f2fs_write_data_page, | |
1067 | .writepages = f2fs_write_data_pages, | |
1068 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1069 | .write_end = f2fs_write_end, |
eb47b800 JK |
1070 | .set_page_dirty = f2fs_set_data_page_dirty, |
1071 | .invalidatepage = f2fs_invalidate_data_page, | |
1072 | .releasepage = f2fs_release_data_page, | |
1073 | .direct_IO = f2fs_direct_IO, | |
c01e54b7 | 1074 | .bmap = f2fs_bmap, |
eb47b800 | 1075 | }; |