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" | |
db9f7c1a | 25 | #include "trace.h" |
848753aa | 26 | #include <trace/events/f2fs.h> |
eb47b800 | 27 | |
93dfe2ac JK |
28 | static void f2fs_read_end_io(struct bio *bio, int err) |
29 | { | |
f568849e LT |
30 | struct bio_vec *bvec; |
31 | int i; | |
93dfe2ac | 32 | |
f568849e | 33 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
34 | struct page *page = bvec->bv_page; |
35 | ||
f568849e LT |
36 | if (!err) { |
37 | SetPageUptodate(page); | |
38 | } else { | |
93dfe2ac JK |
39 | ClearPageUptodate(page); |
40 | SetPageError(page); | |
41 | } | |
42 | unlock_page(page); | |
f568849e | 43 | } |
93dfe2ac JK |
44 | bio_put(bio); |
45 | } | |
46 | ||
47 | static void f2fs_write_end_io(struct bio *bio, int err) | |
48 | { | |
1b1f559f | 49 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
50 | struct bio_vec *bvec; |
51 | int i; | |
93dfe2ac | 52 | |
f568849e | 53 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac JK |
54 | struct page *page = bvec->bv_page; |
55 | ||
f568849e | 56 | if (unlikely(err)) { |
cf779cab | 57 | set_page_dirty(page); |
93dfe2ac | 58 | set_bit(AS_EIO, &page->mapping->flags); |
744602cf | 59 | f2fs_stop_checkpoint(sbi); |
93dfe2ac JK |
60 | } |
61 | end_page_writeback(page); | |
62 | dec_page_count(sbi, F2FS_WRITEBACK); | |
f568849e | 63 | } |
93dfe2ac | 64 | |
93dfe2ac JK |
65 | if (!get_pages(sbi, F2FS_WRITEBACK) && |
66 | !list_empty(&sbi->cp_wait.task_list)) | |
67 | wake_up(&sbi->cp_wait); | |
68 | ||
69 | bio_put(bio); | |
70 | } | |
71 | ||
940a6d34 GZ |
72 | /* |
73 | * Low-level block read/write IO operations. | |
74 | */ | |
75 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
76 | int npages, bool is_read) | |
77 | { | |
78 | struct bio *bio; | |
79 | ||
80 | /* No failure on bio allocation */ | |
81 | bio = bio_alloc(GFP_NOIO, npages); | |
82 | ||
83 | bio->bi_bdev = sbi->sb->s_bdev; | |
55cf9cb6 | 84 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); |
940a6d34 | 85 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
1b1f559f | 86 | bio->bi_private = sbi; |
940a6d34 GZ |
87 | |
88 | return bio; | |
89 | } | |
90 | ||
458e6197 | 91 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 92 | { |
458e6197 | 93 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
94 | |
95 | if (!io->bio) | |
96 | return; | |
97 | ||
6a8f8ca5 JK |
98 | if (is_read_io(fio->rw)) |
99 | trace_f2fs_submit_read_bio(io->sbi->sb, fio->rw, | |
100 | fio->type, io->bio); | |
101 | else | |
102 | trace_f2fs_submit_write_bio(io->sbi->sb, fio->rw, | |
103 | fio->type, io->bio); | |
940a6d34 | 104 | |
6a8f8ca5 | 105 | submit_bio(fio->rw, io->bio); |
93dfe2ac JK |
106 | io->bio = NULL; |
107 | } | |
108 | ||
109 | void f2fs_submit_merged_bio(struct f2fs_sb_info *sbi, | |
458e6197 | 110 | enum page_type type, int rw) |
93dfe2ac JK |
111 | { |
112 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
113 | struct f2fs_bio_info *io; | |
114 | ||
115 | io = is_read_io(rw) ? &sbi->read_io : &sbi->write_io[btype]; | |
116 | ||
df0f8dc0 | 117 | down_write(&io->io_rwsem); |
458e6197 JK |
118 | |
119 | /* change META to META_FLUSH in the checkpoint procedure */ | |
120 | if (type >= META_FLUSH) { | |
121 | io->fio.type = META_FLUSH; | |
0f7b2abd JK |
122 | if (test_opt(sbi, NOBARRIER)) |
123 | io->fio.rw = WRITE_FLUSH | REQ_META | REQ_PRIO; | |
124 | else | |
125 | io->fio.rw = WRITE_FLUSH_FUA | REQ_META | REQ_PRIO; | |
458e6197 JK |
126 | } |
127 | __submit_merged_bio(io); | |
df0f8dc0 | 128 | up_write(&io->io_rwsem); |
93dfe2ac JK |
129 | } |
130 | ||
131 | /* | |
132 | * Fill the locked page with data located in the block address. | |
133 | * Return unlocked page. | |
134 | */ | |
135 | int f2fs_submit_page_bio(struct f2fs_sb_info *sbi, struct page *page, | |
cf04e8eb | 136 | struct f2fs_io_info *fio) |
93dfe2ac | 137 | { |
93dfe2ac JK |
138 | struct bio *bio; |
139 | ||
3e1c8f12 | 140 | trace_f2fs_submit_page_bio(page, fio->blk_addr, fio->rw, fio->type); |
db9f7c1a | 141 | f2fs_trace_ios(page, fio, 0); |
93dfe2ac JK |
142 | |
143 | /* Allocate a new bio */ | |
cf04e8eb | 144 | bio = __bio_alloc(sbi, fio->blk_addr, 1, is_read_io(fio->rw)); |
93dfe2ac JK |
145 | |
146 | if (bio_add_page(bio, page, PAGE_CACHE_SIZE, 0) < PAGE_CACHE_SIZE) { | |
147 | bio_put(bio); | |
148 | f2fs_put_page(page, 1); | |
149 | return -EFAULT; | |
150 | } | |
151 | ||
cf04e8eb | 152 | submit_bio(fio->rw, bio); |
93dfe2ac JK |
153 | return 0; |
154 | } | |
155 | ||
156 | void f2fs_submit_page_mbio(struct f2fs_sb_info *sbi, struct page *page, | |
cf04e8eb | 157 | struct f2fs_io_info *fio) |
93dfe2ac | 158 | { |
458e6197 | 159 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
93dfe2ac | 160 | struct f2fs_bio_info *io; |
940a6d34 | 161 | bool is_read = is_read_io(fio->rw); |
93dfe2ac | 162 | |
940a6d34 | 163 | io = is_read ? &sbi->read_io : &sbi->write_io[btype]; |
93dfe2ac | 164 | |
cf04e8eb | 165 | verify_block_addr(sbi, fio->blk_addr); |
93dfe2ac | 166 | |
df0f8dc0 | 167 | down_write(&io->io_rwsem); |
93dfe2ac | 168 | |
940a6d34 | 169 | if (!is_read) |
93dfe2ac JK |
170 | inc_page_count(sbi, F2FS_WRITEBACK); |
171 | ||
cf04e8eb | 172 | if (io->bio && (io->last_block_in_bio != fio->blk_addr - 1 || |
458e6197 JK |
173 | io->fio.rw != fio->rw)) |
174 | __submit_merged_bio(io); | |
93dfe2ac JK |
175 | alloc_new: |
176 | if (io->bio == NULL) { | |
90a893c7 | 177 | int bio_blocks = MAX_BIO_BLOCKS(sbi); |
940a6d34 | 178 | |
cf04e8eb | 179 | io->bio = __bio_alloc(sbi, fio->blk_addr, bio_blocks, is_read); |
458e6197 | 180 | io->fio = *fio; |
93dfe2ac JK |
181 | } |
182 | ||
183 | if (bio_add_page(io->bio, page, PAGE_CACHE_SIZE, 0) < | |
184 | PAGE_CACHE_SIZE) { | |
458e6197 | 185 | __submit_merged_bio(io); |
93dfe2ac JK |
186 | goto alloc_new; |
187 | } | |
188 | ||
cf04e8eb | 189 | io->last_block_in_bio = fio->blk_addr; |
db9f7c1a | 190 | f2fs_trace_ios(page, fio, 0); |
93dfe2ac | 191 | |
df0f8dc0 | 192 | up_write(&io->io_rwsem); |
3e1c8f12 | 193 | trace_f2fs_submit_page_mbio(page, fio->blk_addr, fio->rw, fio->type); |
93dfe2ac JK |
194 | } |
195 | ||
0a8165d7 | 196 | /* |
eb47b800 JK |
197 | * Lock ordering for the change of data block address: |
198 | * ->data_page | |
199 | * ->node_page | |
200 | * update block addresses in the node page | |
201 | */ | |
202 | static void __set_data_blkaddr(struct dnode_of_data *dn, block_t new_addr) | |
203 | { | |
204 | struct f2fs_node *rn; | |
205 | __le32 *addr_array; | |
206 | struct page *node_page = dn->node_page; | |
207 | unsigned int ofs_in_node = dn->ofs_in_node; | |
208 | ||
5514f0aa | 209 | f2fs_wait_on_page_writeback(node_page, NODE); |
eb47b800 | 210 | |
45590710 | 211 | rn = F2FS_NODE(node_page); |
eb47b800 JK |
212 | |
213 | /* Get physical address of data block */ | |
214 | addr_array = blkaddr_in_node(rn); | |
215 | addr_array[ofs_in_node] = cpu_to_le32(new_addr); | |
216 | set_page_dirty(node_page); | |
217 | } | |
218 | ||
219 | int reserve_new_block(struct dnode_of_data *dn) | |
220 | { | |
4081363f | 221 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
eb47b800 | 222 | |
6bacf52f | 223 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) |
eb47b800 | 224 | return -EPERM; |
cfb271d4 | 225 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) |
eb47b800 JK |
226 | return -ENOSPC; |
227 | ||
c01e2853 NJ |
228 | trace_f2fs_reserve_new_block(dn->inode, dn->nid, dn->ofs_in_node); |
229 | ||
eb47b800 JK |
230 | __set_data_blkaddr(dn, NEW_ADDR); |
231 | dn->data_blkaddr = NEW_ADDR; | |
a18ff063 | 232 | mark_inode_dirty(dn->inode); |
eb47b800 JK |
233 | sync_inode_page(dn); |
234 | return 0; | |
235 | } | |
236 | ||
b600965c HL |
237 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
238 | { | |
239 | bool need_put = dn->inode_page ? false : true; | |
240 | int err; | |
241 | ||
242 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
243 | if (err) | |
244 | return err; | |
a8865372 | 245 | |
b600965c HL |
246 | if (dn->data_blkaddr == NULL_ADDR) |
247 | err = reserve_new_block(dn); | |
a8865372 | 248 | if (err || need_put) |
b600965c HL |
249 | f2fs_put_dnode(dn); |
250 | return err; | |
251 | } | |
252 | ||
eb47b800 JK |
253 | static int check_extent_cache(struct inode *inode, pgoff_t pgofs, |
254 | struct buffer_head *bh_result) | |
255 | { | |
256 | struct f2fs_inode_info *fi = F2FS_I(inode); | |
eb47b800 JK |
257 | pgoff_t start_fofs, end_fofs; |
258 | block_t start_blkaddr; | |
259 | ||
c11abd1a JK |
260 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
261 | return 0; | |
262 | ||
eb47b800 JK |
263 | read_lock(&fi->ext.ext_lock); |
264 | if (fi->ext.len == 0) { | |
265 | read_unlock(&fi->ext.ext_lock); | |
266 | return 0; | |
267 | } | |
268 | ||
dcdfff65 JK |
269 | stat_inc_total_hit(inode->i_sb); |
270 | ||
eb47b800 JK |
271 | start_fofs = fi->ext.fofs; |
272 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
273 | start_blkaddr = fi->ext.blk_addr; | |
274 | ||
275 | if (pgofs >= start_fofs && pgofs <= end_fofs) { | |
276 | unsigned int blkbits = inode->i_sb->s_blocksize_bits; | |
277 | size_t count; | |
278 | ||
279 | clear_buffer_new(bh_result); | |
280 | map_bh(bh_result, inode->i_sb, | |
281 | start_blkaddr + pgofs - start_fofs); | |
282 | count = end_fofs - pgofs + 1; | |
283 | if (count < (UINT_MAX >> blkbits)) | |
284 | bh_result->b_size = (count << blkbits); | |
285 | else | |
286 | bh_result->b_size = UINT_MAX; | |
287 | ||
dcdfff65 | 288 | stat_inc_read_hit(inode->i_sb); |
eb47b800 JK |
289 | read_unlock(&fi->ext.ext_lock); |
290 | return 1; | |
291 | } | |
292 | read_unlock(&fi->ext.ext_lock); | |
293 | return 0; | |
294 | } | |
295 | ||
296 | void update_extent_cache(block_t blk_addr, struct dnode_of_data *dn) | |
297 | { | |
298 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); | |
299 | pgoff_t fofs, start_fofs, end_fofs; | |
300 | block_t start_blkaddr, end_blkaddr; | |
c11abd1a | 301 | int need_update = true; |
eb47b800 | 302 | |
9850cf4a | 303 | f2fs_bug_on(F2FS_I_SB(dn->inode), blk_addr == NEW_ADDR); |
de93653f JK |
304 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + |
305 | dn->ofs_in_node; | |
eb47b800 JK |
306 | |
307 | /* Update the page address in the parent node */ | |
308 | __set_data_blkaddr(dn, blk_addr); | |
309 | ||
c11abd1a JK |
310 | if (is_inode_flag_set(fi, FI_NO_EXTENT)) |
311 | return; | |
312 | ||
eb47b800 JK |
313 | write_lock(&fi->ext.ext_lock); |
314 | ||
315 | start_fofs = fi->ext.fofs; | |
316 | end_fofs = fi->ext.fofs + fi->ext.len - 1; | |
317 | start_blkaddr = fi->ext.blk_addr; | |
318 | end_blkaddr = fi->ext.blk_addr + fi->ext.len - 1; | |
319 | ||
320 | /* Drop and initialize the matched extent */ | |
321 | if (fi->ext.len == 1 && fofs == start_fofs) | |
322 | fi->ext.len = 0; | |
323 | ||
324 | /* Initial extent */ | |
325 | if (fi->ext.len == 0) { | |
326 | if (blk_addr != NULL_ADDR) { | |
327 | fi->ext.fofs = fofs; | |
328 | fi->ext.blk_addr = blk_addr; | |
329 | fi->ext.len = 1; | |
330 | } | |
331 | goto end_update; | |
332 | } | |
333 | ||
6224da87 | 334 | /* Front merge */ |
eb47b800 JK |
335 | if (fofs == start_fofs - 1 && blk_addr == start_blkaddr - 1) { |
336 | fi->ext.fofs--; | |
337 | fi->ext.blk_addr--; | |
338 | fi->ext.len++; | |
339 | goto end_update; | |
340 | } | |
341 | ||
342 | /* Back merge */ | |
343 | if (fofs == end_fofs + 1 && blk_addr == end_blkaddr + 1) { | |
344 | fi->ext.len++; | |
345 | goto end_update; | |
346 | } | |
347 | ||
348 | /* Split the existing extent */ | |
349 | if (fi->ext.len > 1 && | |
350 | fofs >= start_fofs && fofs <= end_fofs) { | |
351 | if ((end_fofs - fofs) < (fi->ext.len >> 1)) { | |
352 | fi->ext.len = fofs - start_fofs; | |
353 | } else { | |
354 | fi->ext.fofs = fofs + 1; | |
355 | fi->ext.blk_addr = start_blkaddr + | |
356 | fofs - start_fofs + 1; | |
357 | fi->ext.len -= fofs - start_fofs + 1; | |
358 | } | |
c11abd1a JK |
359 | } else { |
360 | need_update = false; | |
eb47b800 | 361 | } |
eb47b800 | 362 | |
c11abd1a JK |
363 | /* Finally, if the extent is very fragmented, let's drop the cache. */ |
364 | if (fi->ext.len < F2FS_MIN_EXTENT_LEN) { | |
365 | fi->ext.len = 0; | |
366 | set_inode_flag(fi, FI_NO_EXTENT); | |
367 | need_update = true; | |
368 | } | |
eb47b800 JK |
369 | end_update: |
370 | write_unlock(&fi->ext.ext_lock); | |
c11abd1a JK |
371 | if (need_update) |
372 | sync_inode_page(dn); | |
373 | return; | |
eb47b800 JK |
374 | } |
375 | ||
c718379b | 376 | struct page *find_data_page(struct inode *inode, pgoff_t index, bool sync) |
eb47b800 | 377 | { |
eb47b800 JK |
378 | struct address_space *mapping = inode->i_mapping; |
379 | struct dnode_of_data dn; | |
380 | struct page *page; | |
381 | int err; | |
cf04e8eb JK |
382 | struct f2fs_io_info fio = { |
383 | .type = DATA, | |
384 | .rw = sync ? READ_SYNC : READA, | |
385 | }; | |
eb47b800 JK |
386 | |
387 | page = find_get_page(mapping, index); | |
388 | if (page && PageUptodate(page)) | |
389 | return page; | |
390 | f2fs_put_page(page, 0); | |
391 | ||
392 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 393 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
eb47b800 JK |
394 | if (err) |
395 | return ERR_PTR(err); | |
396 | f2fs_put_dnode(&dn); | |
397 | ||
398 | if (dn.data_blkaddr == NULL_ADDR) | |
399 | return ERR_PTR(-ENOENT); | |
400 | ||
401 | /* By fallocate(), there is no cached page, but with NEW_ADDR */ | |
6bacf52f | 402 | if (unlikely(dn.data_blkaddr == NEW_ADDR)) |
eb47b800 JK |
403 | return ERR_PTR(-EINVAL); |
404 | ||
9ac1349a | 405 | page = grab_cache_page(mapping, index); |
eb47b800 JK |
406 | if (!page) |
407 | return ERR_PTR(-ENOMEM); | |
408 | ||
393ff91f JK |
409 | if (PageUptodate(page)) { |
410 | unlock_page(page); | |
411 | return page; | |
412 | } | |
413 | ||
cf04e8eb JK |
414 | fio.blk_addr = dn.data_blkaddr; |
415 | err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio); | |
1069bbf7 CY |
416 | if (err) |
417 | return ERR_PTR(err); | |
418 | ||
c718379b JK |
419 | if (sync) { |
420 | wait_on_page_locked(page); | |
6bacf52f | 421 | if (unlikely(!PageUptodate(page))) { |
c718379b JK |
422 | f2fs_put_page(page, 0); |
423 | return ERR_PTR(-EIO); | |
424 | } | |
eb47b800 | 425 | } |
eb47b800 JK |
426 | return page; |
427 | } | |
428 | ||
0a8165d7 | 429 | /* |
eb47b800 JK |
430 | * If it tries to access a hole, return an error. |
431 | * Because, the callers, functions in dir.c and GC, should be able to know | |
432 | * whether this page exists or not. | |
433 | */ | |
434 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index) | |
435 | { | |
eb47b800 JK |
436 | struct address_space *mapping = inode->i_mapping; |
437 | struct dnode_of_data dn; | |
438 | struct page *page; | |
439 | int err; | |
cf04e8eb JK |
440 | struct f2fs_io_info fio = { |
441 | .type = DATA, | |
442 | .rw = READ_SYNC, | |
443 | }; | |
650495de | 444 | repeat: |
9ac1349a | 445 | page = grab_cache_page(mapping, index); |
650495de JK |
446 | if (!page) |
447 | return ERR_PTR(-ENOMEM); | |
448 | ||
eb47b800 | 449 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 450 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
650495de JK |
451 | if (err) { |
452 | f2fs_put_page(page, 1); | |
eb47b800 | 453 | return ERR_PTR(err); |
650495de | 454 | } |
eb47b800 JK |
455 | f2fs_put_dnode(&dn); |
456 | ||
6bacf52f | 457 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
650495de | 458 | f2fs_put_page(page, 1); |
eb47b800 | 459 | return ERR_PTR(-ENOENT); |
650495de | 460 | } |
eb47b800 JK |
461 | |
462 | if (PageUptodate(page)) | |
463 | return page; | |
464 | ||
d59ff4df JK |
465 | /* |
466 | * A new dentry page is allocated but not able to be written, since its | |
467 | * new inode page couldn't be allocated due to -ENOSPC. | |
468 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
469 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
470 | */ | |
471 | if (dn.data_blkaddr == NEW_ADDR) { | |
472 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
473 | SetPageUptodate(page); | |
474 | return page; | |
475 | } | |
eb47b800 | 476 | |
cf04e8eb JK |
477 | fio.blk_addr = dn.data_blkaddr; |
478 | err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio); | |
393ff91f | 479 | if (err) |
eb47b800 | 480 | return ERR_PTR(err); |
393ff91f JK |
481 | |
482 | lock_page(page); | |
6bacf52f | 483 | if (unlikely(!PageUptodate(page))) { |
393ff91f JK |
484 | f2fs_put_page(page, 1); |
485 | return ERR_PTR(-EIO); | |
eb47b800 | 486 | } |
6bacf52f | 487 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
488 | f2fs_put_page(page, 1); |
489 | goto repeat; | |
eb47b800 JK |
490 | } |
491 | return page; | |
492 | } | |
493 | ||
0a8165d7 | 494 | /* |
eb47b800 JK |
495 | * Caller ensures that this data page is never allocated. |
496 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 497 | * |
4f4124d0 CY |
498 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
499 | * f2fs_unlock_op(). | |
a8865372 | 500 | * Note that, ipage is set only by make_empty_dir. |
eb47b800 | 501 | */ |
64aa7ed9 | 502 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 503 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 504 | { |
eb47b800 JK |
505 | struct address_space *mapping = inode->i_mapping; |
506 | struct page *page; | |
507 | struct dnode_of_data dn; | |
508 | int err; | |
509 | ||
a8865372 | 510 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 511 | err = f2fs_reserve_block(&dn, index); |
eb47b800 JK |
512 | if (err) |
513 | return ERR_PTR(err); | |
afcb7ca0 | 514 | repeat: |
eb47b800 | 515 | page = grab_cache_page(mapping, index); |
a8865372 JK |
516 | if (!page) { |
517 | err = -ENOMEM; | |
518 | goto put_err; | |
519 | } | |
eb47b800 JK |
520 | |
521 | if (PageUptodate(page)) | |
522 | return page; | |
523 | ||
524 | if (dn.data_blkaddr == NEW_ADDR) { | |
525 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); | |
393ff91f | 526 | SetPageUptodate(page); |
eb47b800 | 527 | } else { |
cf04e8eb JK |
528 | struct f2fs_io_info fio = { |
529 | .type = DATA, | |
530 | .rw = READ_SYNC, | |
531 | .blk_addr = dn.data_blkaddr, | |
532 | }; | |
533 | err = f2fs_submit_page_bio(F2FS_I_SB(inode), page, &fio); | |
393ff91f | 534 | if (err) |
a8865372 JK |
535 | goto put_err; |
536 | ||
393ff91f | 537 | lock_page(page); |
6bacf52f | 538 | if (unlikely(!PageUptodate(page))) { |
393ff91f | 539 | f2fs_put_page(page, 1); |
a8865372 JK |
540 | err = -EIO; |
541 | goto put_err; | |
eb47b800 | 542 | } |
6bacf52f | 543 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
544 | f2fs_put_page(page, 1); |
545 | goto repeat; | |
eb47b800 JK |
546 | } |
547 | } | |
eb47b800 JK |
548 | |
549 | if (new_i_size && | |
550 | i_size_read(inode) < ((index + 1) << PAGE_CACHE_SHIFT)) { | |
551 | i_size_write(inode, ((index + 1) << PAGE_CACHE_SHIFT)); | |
699489bb JK |
552 | /* Only the directory inode sets new_i_size */ |
553 | set_inode_flag(F2FS_I(inode), FI_UPDATE_DIR); | |
eb47b800 JK |
554 | } |
555 | return page; | |
a8865372 JK |
556 | |
557 | put_err: | |
558 | f2fs_put_dnode(&dn); | |
559 | return ERR_PTR(err); | |
eb47b800 JK |
560 | } |
561 | ||
bfad7c2d JK |
562 | static int __allocate_data_block(struct dnode_of_data *dn) |
563 | { | |
4081363f | 564 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
976e4c50 | 565 | struct f2fs_inode_info *fi = F2FS_I(dn->inode); |
bfad7c2d JK |
566 | struct f2fs_summary sum; |
567 | block_t new_blkaddr; | |
568 | struct node_info ni; | |
976e4c50 | 569 | pgoff_t fofs; |
bfad7c2d JK |
570 | int type; |
571 | ||
572 | if (unlikely(is_inode_flag_set(F2FS_I(dn->inode), FI_NO_ALLOC))) | |
573 | return -EPERM; | |
574 | if (unlikely(!inc_valid_block_count(sbi, dn->inode, 1))) | |
575 | return -ENOSPC; | |
576 | ||
577 | __set_data_blkaddr(dn, NEW_ADDR); | |
578 | dn->data_blkaddr = NEW_ADDR; | |
579 | ||
580 | get_node_info(sbi, dn->nid, &ni); | |
581 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
582 | ||
583 | type = CURSEG_WARM_DATA; | |
584 | ||
585 | allocate_data_block(sbi, NULL, NULL_ADDR, &new_blkaddr, &sum, type); | |
586 | ||
587 | /* direct IO doesn't use extent cache to maximize the performance */ | |
588 | set_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
589 | update_extent_cache(new_blkaddr, dn); | |
590 | clear_inode_flag(F2FS_I(dn->inode), FI_NO_EXTENT); | |
591 | ||
976e4c50 JK |
592 | /* update i_size */ |
593 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), fi) + | |
594 | dn->ofs_in_node; | |
595 | if (i_size_read(dn->inode) < ((fofs + 1) << PAGE_CACHE_SHIFT)) | |
596 | i_size_write(dn->inode, ((fofs + 1) << PAGE_CACHE_SHIFT)); | |
597 | ||
bfad7c2d JK |
598 | dn->data_blkaddr = new_blkaddr; |
599 | return 0; | |
600 | } | |
601 | ||
0a8165d7 | 602 | /* |
4f4124d0 CY |
603 | * get_data_block() now supported readahead/bmap/rw direct_IO with mapped bh. |
604 | * If original data blocks are allocated, then give them to blockdev. | |
605 | * Otherwise, | |
606 | * a. preallocate requested block addresses | |
607 | * b. do not use extent cache for better performance | |
608 | * c. give the block addresses to blockdev | |
eb47b800 | 609 | */ |
ccfb3000 JK |
610 | static int __get_data_block(struct inode *inode, sector_t iblock, |
611 | struct buffer_head *bh_result, int create, bool fiemap) | |
eb47b800 JK |
612 | { |
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 | ||
79e35dc3 | 627 | if (create) { |
4081363f JK |
628 | f2fs_balance_fs(F2FS_I_SB(inode)); |
629 | f2fs_lock_op(F2FS_I_SB(inode)); | |
79e35dc3 | 630 | } |
eb47b800 JK |
631 | |
632 | /* When reading holes, we need its node page */ | |
633 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 634 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 635 | if (err) { |
bfad7c2d JK |
636 | if (err == -ENOENT) |
637 | err = 0; | |
638 | goto unlock_out; | |
848753aa | 639 | } |
ccfb3000 | 640 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 | 641 | goto put_out; |
eb47b800 | 642 | |
bfad7c2d JK |
643 | if (dn.data_blkaddr != NULL_ADDR) { |
644 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
645 | } else if (create) { | |
646 | err = __allocate_data_block(&dn); | |
647 | if (err) | |
648 | goto put_out; | |
649 | allocated = true; | |
650 | map_bh(bh_result, inode->i_sb, dn.data_blkaddr); | |
651 | } else { | |
652 | goto put_out; | |
653 | } | |
654 | ||
6403eb1f | 655 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d JK |
656 | bh_result->b_size = (((size_t)1) << blkbits); |
657 | dn.ofs_in_node++; | |
658 | pgofs++; | |
659 | ||
660 | get_next: | |
661 | if (dn.ofs_in_node >= end_offset) { | |
662 | if (allocated) | |
663 | sync_inode_page(&dn); | |
664 | allocated = false; | |
665 | f2fs_put_dnode(&dn); | |
666 | ||
667 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
668 | err = get_dnode_of_data(&dn, pgofs, mode); | |
1ec79083 | 669 | if (err) { |
bfad7c2d JK |
670 | if (err == -ENOENT) |
671 | err = 0; | |
672 | goto unlock_out; | |
673 | } | |
ccfb3000 | 674 | if (dn.data_blkaddr == NEW_ADDR && !fiemap) |
1ec79083 JK |
675 | goto put_out; |
676 | ||
6403eb1f | 677 | end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode)); |
bfad7c2d | 678 | } |
eb47b800 | 679 | |
bfad7c2d JK |
680 | if (maxblocks > (bh_result->b_size >> blkbits)) { |
681 | block_t blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node); | |
682 | if (blkaddr == NULL_ADDR && create) { | |
683 | err = __allocate_data_block(&dn); | |
684 | if (err) | |
685 | goto sync_out; | |
686 | allocated = true; | |
687 | blkaddr = dn.data_blkaddr; | |
688 | } | |
e1c42045 | 689 | /* Give more consecutive addresses for the readahead */ |
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) | |
4081363f | 705 | f2fs_unlock_op(F2FS_I_SB(inode)); |
bfad7c2d JK |
706 | out: |
707 | trace_f2fs_get_data_block(inode, iblock, bh_result, err); | |
708 | return err; | |
eb47b800 JK |
709 | } |
710 | ||
ccfb3000 JK |
711 | static int get_data_block(struct inode *inode, sector_t iblock, |
712 | struct buffer_head *bh_result, int create) | |
713 | { | |
714 | return __get_data_block(inode, iblock, bh_result, create, false); | |
715 | } | |
716 | ||
717 | static int get_data_block_fiemap(struct inode *inode, sector_t iblock, | |
718 | struct buffer_head *bh_result, int create) | |
719 | { | |
720 | return __get_data_block(inode, iblock, bh_result, create, true); | |
721 | } | |
722 | ||
9ab70134 JK |
723 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
724 | u64 start, u64 len) | |
725 | { | |
ccfb3000 JK |
726 | return generic_block_fiemap(inode, fieinfo, |
727 | start, len, get_data_block_fiemap); | |
9ab70134 JK |
728 | } |
729 | ||
eb47b800 JK |
730 | static int f2fs_read_data_page(struct file *file, struct page *page) |
731 | { | |
9ffe0fb5 | 732 | struct inode *inode = page->mapping->host; |
b3d208f9 | 733 | int ret = -EAGAIN; |
9ffe0fb5 | 734 | |
c20e89cd CY |
735 | trace_f2fs_readpage(page, DATA); |
736 | ||
e1c42045 | 737 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
738 | if (f2fs_has_inline_data(inode)) |
739 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 740 | if (ret == -EAGAIN) |
9ffe0fb5 HL |
741 | ret = mpage_readpage(page, get_data_block); |
742 | ||
743 | return ret; | |
eb47b800 JK |
744 | } |
745 | ||
746 | static int f2fs_read_data_pages(struct file *file, | |
747 | struct address_space *mapping, | |
748 | struct list_head *pages, unsigned nr_pages) | |
749 | { | |
9ffe0fb5 HL |
750 | struct inode *inode = file->f_mapping->host; |
751 | ||
752 | /* If the file has inline data, skip readpages */ | |
753 | if (f2fs_has_inline_data(inode)) | |
754 | return 0; | |
755 | ||
bfad7c2d | 756 | return mpage_readpages(mapping, pages, nr_pages, get_data_block); |
eb47b800 JK |
757 | } |
758 | ||
458e6197 | 759 | int do_write_data_page(struct page *page, struct f2fs_io_info *fio) |
eb47b800 JK |
760 | { |
761 | struct inode *inode = page->mapping->host; | |
eb47b800 JK |
762 | struct dnode_of_data dn; |
763 | int err = 0; | |
764 | ||
765 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
266e97a8 | 766 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 JK |
767 | if (err) |
768 | return err; | |
769 | ||
cf04e8eb | 770 | fio->blk_addr = dn.data_blkaddr; |
eb47b800 JK |
771 | |
772 | /* This page is already truncated */ | |
cf04e8eb | 773 | if (fio->blk_addr == NULL_ADDR) |
eb47b800 JK |
774 | goto out_writepage; |
775 | ||
776 | set_page_writeback(page); | |
777 | ||
778 | /* | |
779 | * If current allocation needs SSR, | |
780 | * it had better in-place writes for updated data. | |
781 | */ | |
cf04e8eb | 782 | if (unlikely(fio->blk_addr != NEW_ADDR && |
b25958b6 HL |
783 | !is_cold_data(page) && |
784 | need_inplace_update(inode))) { | |
cf04e8eb | 785 | rewrite_data_page(page, fio); |
fff04f90 | 786 | set_inode_flag(F2FS_I(inode), FI_UPDATE_WRITE); |
eb47b800 | 787 | } else { |
cf04e8eb JK |
788 | write_data_page(page, &dn, fio); |
789 | update_extent_cache(fio->blk_addr, &dn); | |
fff04f90 | 790 | set_inode_flag(F2FS_I(inode), FI_APPEND_WRITE); |
eb47b800 JK |
791 | } |
792 | out_writepage: | |
793 | f2fs_put_dnode(&dn); | |
794 | return err; | |
795 | } | |
796 | ||
797 | static int f2fs_write_data_page(struct page *page, | |
798 | struct writeback_control *wbc) | |
799 | { | |
800 | struct inode *inode = page->mapping->host; | |
4081363f | 801 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
802 | loff_t i_size = i_size_read(inode); |
803 | const pgoff_t end_index = ((unsigned long long) i_size) | |
804 | >> PAGE_CACHE_SHIFT; | |
9ffe0fb5 | 805 | unsigned offset = 0; |
39936837 | 806 | bool need_balance_fs = false; |
eb47b800 | 807 | int err = 0; |
458e6197 JK |
808 | struct f2fs_io_info fio = { |
809 | .type = DATA, | |
6c311ec6 | 810 | .rw = (wbc->sync_mode == WB_SYNC_ALL) ? WRITE_SYNC : WRITE, |
458e6197 | 811 | }; |
eb47b800 | 812 | |
ecda0de3 CY |
813 | trace_f2fs_writepage(page, DATA); |
814 | ||
eb47b800 | 815 | if (page->index < end_index) |
39936837 | 816 | goto write; |
eb47b800 JK |
817 | |
818 | /* | |
819 | * If the offset is out-of-range of file size, | |
820 | * this page does not have to be written to disk. | |
821 | */ | |
822 | offset = i_size & (PAGE_CACHE_SIZE - 1); | |
76f60268 | 823 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 824 | goto out; |
eb47b800 JK |
825 | |
826 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); | |
39936837 | 827 | write: |
8618b881 | 828 | if (unlikely(sbi->por_doing)) |
eb47b800 | 829 | goto redirty_out; |
1e84371f JK |
830 | if (f2fs_is_drop_cache(inode)) |
831 | goto out; | |
832 | if (f2fs_is_volatile_file(inode) && !wbc->for_reclaim && | |
833 | available_free_memory(sbi, BASE_CHECK)) | |
834 | goto redirty_out; | |
eb47b800 | 835 | |
39936837 | 836 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 837 | if (S_ISDIR(inode->i_mode)) { |
cf779cab JK |
838 | if (unlikely(f2fs_cp_error(sbi))) |
839 | goto redirty_out; | |
458e6197 | 840 | err = do_write_data_page(page, &fio); |
8618b881 JK |
841 | goto done; |
842 | } | |
9ffe0fb5 | 843 | |
cf779cab JK |
844 | /* we should bypass data pages to proceed the kworkder jobs */ |
845 | if (unlikely(f2fs_cp_error(sbi))) { | |
846 | SetPageError(page); | |
847 | unlock_page(page); | |
a7ffdbe2 | 848 | goto out; |
cf779cab JK |
849 | } |
850 | ||
8618b881 | 851 | if (!wbc->for_reclaim) |
39936837 | 852 | need_balance_fs = true; |
8618b881 | 853 | else if (has_not_enough_free_secs(sbi, 0)) |
39936837 | 854 | goto redirty_out; |
eb47b800 | 855 | |
b3d208f9 | 856 | err = -EAGAIN; |
8618b881 | 857 | f2fs_lock_op(sbi); |
b3d208f9 JK |
858 | if (f2fs_has_inline_data(inode)) |
859 | err = f2fs_write_inline_data(inode, page); | |
860 | if (err == -EAGAIN) | |
8618b881 JK |
861 | err = do_write_data_page(page, &fio); |
862 | f2fs_unlock_op(sbi); | |
863 | done: | |
864 | if (err && err != -ENOENT) | |
865 | goto redirty_out; | |
eb47b800 | 866 | |
eb47b800 | 867 | clear_cold_data(page); |
39936837 | 868 | out: |
a7ffdbe2 | 869 | inode_dec_dirty_pages(inode); |
eb47b800 | 870 | unlock_page(page); |
39936837 | 871 | if (need_balance_fs) |
eb47b800 | 872 | f2fs_balance_fs(sbi); |
2aea39ec JK |
873 | if (wbc->for_reclaim) |
874 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
875 | return 0; |
876 | ||
eb47b800 | 877 | redirty_out: |
76f60268 | 878 | redirty_page_for_writepage(wbc, page); |
8618b881 | 879 | return AOP_WRITEPAGE_ACTIVATE; |
eb47b800 JK |
880 | } |
881 | ||
fa9150a8 NJ |
882 | static int __f2fs_writepage(struct page *page, struct writeback_control *wbc, |
883 | void *data) | |
884 | { | |
885 | struct address_space *mapping = data; | |
886 | int ret = mapping->a_ops->writepage(page, wbc); | |
887 | mapping_set_error(mapping, ret); | |
888 | return ret; | |
889 | } | |
890 | ||
25ca923b | 891 | static int f2fs_write_data_pages(struct address_space *mapping, |
eb47b800 JK |
892 | struct writeback_control *wbc) |
893 | { | |
894 | struct inode *inode = mapping->host; | |
4081363f | 895 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
531ad7d5 | 896 | bool locked = false; |
eb47b800 | 897 | int ret; |
50c8cdb3 | 898 | long diff; |
eb47b800 | 899 | |
e5748434 CY |
900 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
901 | ||
cfb185a1 | 902 | /* deal with chardevs and other special file */ |
903 | if (!mapping->a_ops->writepage) | |
904 | return 0; | |
905 | ||
87d6f890 | 906 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
a7ffdbe2 | 907 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && |
6fb03f3a | 908 | available_free_memory(sbi, DIRTY_DENTS)) |
d3baf95d | 909 | goto skip_write; |
87d6f890 | 910 | |
50c8cdb3 | 911 | diff = nr_pages_to_write(sbi, DATA, wbc); |
eb47b800 | 912 | |
531ad7d5 | 913 | if (!S_ISDIR(inode->i_mode)) { |
eb47b800 | 914 | mutex_lock(&sbi->writepages); |
531ad7d5 JK |
915 | locked = true; |
916 | } | |
fa9150a8 | 917 | ret = write_cache_pages(mapping, wbc, __f2fs_writepage, mapping); |
531ad7d5 | 918 | if (locked) |
eb47b800 | 919 | mutex_unlock(&sbi->writepages); |
458e6197 JK |
920 | |
921 | f2fs_submit_merged_bio(sbi, DATA, WRITE); | |
eb47b800 JK |
922 | |
923 | remove_dirty_dir_inode(inode); | |
924 | ||
50c8cdb3 | 925 | wbc->nr_to_write = max((long)0, wbc->nr_to_write - diff); |
eb47b800 | 926 | return ret; |
d3baf95d JK |
927 | |
928 | skip_write: | |
a7ffdbe2 | 929 | wbc->pages_skipped += get_dirty_pages(inode); |
d3baf95d | 930 | return 0; |
eb47b800 JK |
931 | } |
932 | ||
3aab8f82 CY |
933 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
934 | { | |
935 | struct inode *inode = mapping->host; | |
936 | ||
937 | if (to > inode->i_size) { | |
938 | truncate_pagecache(inode, inode->i_size); | |
764aa3e9 | 939 | truncate_blocks(inode, inode->i_size, true); |
3aab8f82 CY |
940 | } |
941 | } | |
942 | ||
eb47b800 JK |
943 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
944 | loff_t pos, unsigned len, unsigned flags, | |
945 | struct page **pagep, void **fsdata) | |
946 | { | |
947 | struct inode *inode = mapping->host; | |
4081363f | 948 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
9ba69cf9 | 949 | struct page *page, *ipage; |
eb47b800 JK |
950 | pgoff_t index = ((unsigned long long) pos) >> PAGE_CACHE_SHIFT; |
951 | struct dnode_of_data dn; | |
952 | int err = 0; | |
953 | ||
62aed044 CY |
954 | trace_f2fs_write_begin(inode, pos, len, flags); |
955 | ||
eb47b800 | 956 | f2fs_balance_fs(sbi); |
5f727395 JK |
957 | |
958 | /* | |
959 | * We should check this at this moment to avoid deadlock on inode page | |
960 | * and #0 page. The locking rule for inline_data conversion should be: | |
961 | * lock_page(page #0) -> lock_page(inode_page) | |
962 | */ | |
963 | if (index != 0) { | |
964 | err = f2fs_convert_inline_inode(inode); | |
965 | if (err) | |
966 | goto fail; | |
967 | } | |
afcb7ca0 | 968 | repeat: |
eb47b800 | 969 | page = grab_cache_page_write_begin(mapping, index, flags); |
3aab8f82 CY |
970 | if (!page) { |
971 | err = -ENOMEM; | |
972 | goto fail; | |
973 | } | |
d5f66990 | 974 | |
eb47b800 JK |
975 | *pagep = page; |
976 | ||
e479556b | 977 | f2fs_lock_op(sbi); |
9ba69cf9 JK |
978 | |
979 | /* check inline_data */ | |
980 | ipage = get_node_page(sbi, inode->i_ino); | |
cd34e296 CY |
981 | if (IS_ERR(ipage)) { |
982 | err = PTR_ERR(ipage); | |
9ba69cf9 | 983 | goto unlock_fail; |
cd34e296 | 984 | } |
9ba69cf9 | 985 | |
b3d208f9 JK |
986 | set_new_dnode(&dn, inode, ipage, ipage, 0); |
987 | ||
9ba69cf9 | 988 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 JK |
989 | if (pos + len <= MAX_INLINE_DATA) { |
990 | read_inline_data(page, ipage); | |
991 | set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); | |
992 | sync_inode_page(&dn); | |
993 | goto put_next; | |
b3d208f9 | 994 | } |
5f727395 JK |
995 | err = f2fs_convert_inline_page(&dn, page); |
996 | if (err) | |
997 | goto put_fail; | |
b600965c | 998 | } |
9ba69cf9 JK |
999 | err = f2fs_reserve_block(&dn, index); |
1000 | if (err) | |
8cdcb713 | 1001 | goto put_fail; |
b3d208f9 | 1002 | put_next: |
9ba69cf9 JK |
1003 | f2fs_put_dnode(&dn); |
1004 | f2fs_unlock_op(sbi); | |
1005 | ||
eb47b800 JK |
1006 | if ((len == PAGE_CACHE_SIZE) || PageUptodate(page)) |
1007 | return 0; | |
1008 | ||
b3d208f9 JK |
1009 | f2fs_wait_on_page_writeback(page, DATA); |
1010 | ||
eb47b800 JK |
1011 | if ((pos & PAGE_CACHE_MASK) >= i_size_read(inode)) { |
1012 | unsigned start = pos & (PAGE_CACHE_SIZE - 1); | |
1013 | unsigned end = start + len; | |
1014 | ||
1015 | /* Reading beyond i_size is simple: memset to zero */ | |
1016 | zero_user_segments(page, 0, start, end, PAGE_CACHE_SIZE); | |
393ff91f | 1017 | goto out; |
eb47b800 JK |
1018 | } |
1019 | ||
b3d208f9 | 1020 | if (dn.data_blkaddr == NEW_ADDR) { |
eb47b800 JK |
1021 | zero_user_segment(page, 0, PAGE_CACHE_SIZE); |
1022 | } else { | |
cf04e8eb JK |
1023 | struct f2fs_io_info fio = { |
1024 | .type = DATA, | |
1025 | .rw = READ_SYNC, | |
1026 | .blk_addr = dn.data_blkaddr, | |
1027 | }; | |
1028 | err = f2fs_submit_page_bio(sbi, page, &fio); | |
9234f319 JK |
1029 | if (err) |
1030 | goto fail; | |
d54c795b | 1031 | |
393ff91f | 1032 | lock_page(page); |
6bacf52f | 1033 | if (unlikely(!PageUptodate(page))) { |
393ff91f | 1034 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1035 | err = -EIO; |
1036 | goto fail; | |
eb47b800 | 1037 | } |
6bacf52f | 1038 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
1039 | f2fs_put_page(page, 1); |
1040 | goto repeat; | |
eb47b800 JK |
1041 | } |
1042 | } | |
393ff91f | 1043 | out: |
eb47b800 JK |
1044 | SetPageUptodate(page); |
1045 | clear_cold_data(page); | |
1046 | return 0; | |
9ba69cf9 | 1047 | |
8cdcb713 JK |
1048 | put_fail: |
1049 | f2fs_put_dnode(&dn); | |
9ba69cf9 JK |
1050 | unlock_fail: |
1051 | f2fs_unlock_op(sbi); | |
b3d208f9 | 1052 | f2fs_put_page(page, 1); |
3aab8f82 CY |
1053 | fail: |
1054 | f2fs_write_failed(mapping, pos + len); | |
1055 | return err; | |
eb47b800 JK |
1056 | } |
1057 | ||
a1dd3c13 JK |
1058 | static int f2fs_write_end(struct file *file, |
1059 | struct address_space *mapping, | |
1060 | loff_t pos, unsigned len, unsigned copied, | |
1061 | struct page *page, void *fsdata) | |
1062 | { | |
1063 | struct inode *inode = page->mapping->host; | |
1064 | ||
dfb2bf38 CY |
1065 | trace_f2fs_write_end(inode, pos, len, copied); |
1066 | ||
34ba94ba | 1067 | set_page_dirty(page); |
a1dd3c13 JK |
1068 | |
1069 | if (pos + copied > i_size_read(inode)) { | |
1070 | i_size_write(inode, pos + copied); | |
1071 | mark_inode_dirty(inode); | |
1072 | update_inode_page(inode); | |
1073 | } | |
1074 | ||
75c3c8bc | 1075 | f2fs_put_page(page, 1); |
a1dd3c13 JK |
1076 | return copied; |
1077 | } | |
1078 | ||
944fcfc1 | 1079 | static int check_direct_IO(struct inode *inode, int rw, |
5b46f25d | 1080 | struct iov_iter *iter, loff_t offset) |
944fcfc1 JK |
1081 | { |
1082 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 JK |
1083 | |
1084 | if (rw == READ) | |
1085 | return 0; | |
1086 | ||
1087 | if (offset & blocksize_mask) | |
1088 | return -EINVAL; | |
1089 | ||
5b46f25d AV |
1090 | if (iov_iter_alignment(iter) & blocksize_mask) |
1091 | return -EINVAL; | |
1092 | ||
944fcfc1 JK |
1093 | return 0; |
1094 | } | |
1095 | ||
eb47b800 | 1096 | static ssize_t f2fs_direct_IO(int rw, struct kiocb *iocb, |
d8d3d94b | 1097 | struct iov_iter *iter, loff_t offset) |
eb47b800 JK |
1098 | { |
1099 | struct file *file = iocb->ki_filp; | |
3aab8f82 CY |
1100 | struct address_space *mapping = file->f_mapping; |
1101 | struct inode *inode = mapping->host; | |
1102 | size_t count = iov_iter_count(iter); | |
1103 | int err; | |
944fcfc1 | 1104 | |
b3d208f9 JK |
1105 | /* we don't need to use inline_data strictly */ |
1106 | if (f2fs_has_inline_data(inode)) { | |
1107 | err = f2fs_convert_inline_inode(inode); | |
1108 | if (err) | |
1109 | return err; | |
1110 | } | |
9ffe0fb5 | 1111 | |
5b46f25d | 1112 | if (check_direct_IO(inode, rw, iter, offset)) |
944fcfc1 JK |
1113 | return 0; |
1114 | ||
70407fad CY |
1115 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
1116 | ||
3aab8f82 CY |
1117 | err = blockdev_direct_IO(rw, iocb, inode, iter, offset, get_data_block); |
1118 | if (err < 0 && (rw & WRITE)) | |
1119 | f2fs_write_failed(mapping, offset + count); | |
70407fad CY |
1120 | |
1121 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); | |
1122 | ||
3aab8f82 | 1123 | return err; |
eb47b800 JK |
1124 | } |
1125 | ||
d47992f8 LC |
1126 | static void f2fs_invalidate_data_page(struct page *page, unsigned int offset, |
1127 | unsigned int length) | |
eb47b800 JK |
1128 | { |
1129 | struct inode *inode = page->mapping->host; | |
a7ffdbe2 JK |
1130 | |
1131 | if (offset % PAGE_CACHE_SIZE || length != PAGE_CACHE_SIZE) | |
1132 | return; | |
1133 | ||
1fe54f9d | 1134 | if (PageDirty(page)) |
a7ffdbe2 | 1135 | inode_dec_dirty_pages(inode); |
eb47b800 JK |
1136 | ClearPagePrivate(page); |
1137 | } | |
1138 | ||
1139 | static int f2fs_release_data_page(struct page *page, gfp_t wait) | |
1140 | { | |
1141 | ClearPagePrivate(page); | |
c3850aa1 | 1142 | return 1; |
eb47b800 JK |
1143 | } |
1144 | ||
1145 | static int f2fs_set_data_page_dirty(struct page *page) | |
1146 | { | |
1147 | struct address_space *mapping = page->mapping; | |
1148 | struct inode *inode = mapping->host; | |
1149 | ||
26c6b887 JK |
1150 | trace_f2fs_set_page_dirty(page, DATA); |
1151 | ||
eb47b800 | 1152 | SetPageUptodate(page); |
34ba94ba | 1153 | |
1e84371f | 1154 | if (f2fs_is_atomic_file(inode)) { |
34ba94ba JK |
1155 | register_inmem_page(inode, page); |
1156 | return 1; | |
1157 | } | |
1158 | ||
a18ff063 JK |
1159 | mark_inode_dirty(inode); |
1160 | ||
eb47b800 JK |
1161 | if (!PageDirty(page)) { |
1162 | __set_page_dirty_nobuffers(page); | |
a7ffdbe2 | 1163 | update_dirty_page(inode, page); |
eb47b800 JK |
1164 | return 1; |
1165 | } | |
1166 | return 0; | |
1167 | } | |
1168 | ||
c01e54b7 JK |
1169 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
1170 | { | |
454ae7e5 CY |
1171 | struct inode *inode = mapping->host; |
1172 | ||
b3d208f9 JK |
1173 | /* we don't need to use inline_data strictly */ |
1174 | if (f2fs_has_inline_data(inode)) { | |
1175 | int err = f2fs_convert_inline_inode(inode); | |
1176 | if (err) | |
1177 | return err; | |
1178 | } | |
bfad7c2d | 1179 | return generic_block_bmap(mapping, block, get_data_block); |
c01e54b7 JK |
1180 | } |
1181 | ||
eb47b800 JK |
1182 | const struct address_space_operations f2fs_dblock_aops = { |
1183 | .readpage = f2fs_read_data_page, | |
1184 | .readpages = f2fs_read_data_pages, | |
1185 | .writepage = f2fs_write_data_page, | |
1186 | .writepages = f2fs_write_data_pages, | |
1187 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 1188 | .write_end = f2fs_write_end, |
eb47b800 JK |
1189 | .set_page_dirty = f2fs_set_data_page_dirty, |
1190 | .invalidatepage = f2fs_invalidate_data_page, | |
1191 | .releasepage = f2fs_release_data_page, | |
1192 | .direct_IO = f2fs_direct_IO, | |
c01e54b7 | 1193 | .bmap = f2fs_bmap, |
eb47b800 | 1194 | }; |