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> | |
15 | #include <linux/writeback.h> | |
16 | #include <linux/backing-dev.h> | |
8f46dcae | 17 | #include <linux/pagevec.h> |
eb47b800 JK |
18 | #include <linux/blkdev.h> |
19 | #include <linux/bio.h> | |
690e4a3e | 20 | #include <linux/prefetch.h> |
e2e40f2c | 21 | #include <linux/uio.h> |
c1286ff4 JK |
22 | #include <linux/mm.h> |
23 | #include <linux/memcontrol.h> | |
f1e88660 | 24 | #include <linux/cleancache.h> |
eb47b800 JK |
25 | |
26 | #include "f2fs.h" | |
27 | #include "node.h" | |
28 | #include "segment.h" | |
db9f7c1a | 29 | #include "trace.h" |
848753aa | 30 | #include <trace/events/f2fs.h> |
32cbbe59 | 31 | #include <trace/events/android_fs.h> |
eb47b800 | 32 | |
9e266223 CY |
33 | static bool __is_cp_guaranteed(struct page *page) |
34 | { | |
35 | struct address_space *mapping = page->mapping; | |
36 | struct inode *inode; | |
37 | struct f2fs_sb_info *sbi; | |
38 | ||
39 | if (!mapping) | |
40 | return false; | |
41 | ||
42 | inode = mapping->host; | |
43 | sbi = F2FS_I_SB(inode); | |
44 | ||
45 | if (inode->i_ino == F2FS_META_INO(sbi) || | |
46 | inode->i_ino == F2FS_NODE_INO(sbi) || | |
47 | S_ISDIR(inode->i_mode) || | |
48 | is_cold_data(page)) | |
49 | return true; | |
50 | return false; | |
51 | } | |
52 | ||
4246a0b6 | 53 | static void f2fs_read_end_io(struct bio *bio) |
93dfe2ac | 54 | { |
f568849e LT |
55 | struct bio_vec *bvec; |
56 | int i; | |
93dfe2ac | 57 | |
c1286ff4 | 58 | #ifdef CONFIG_F2FS_FAULT_INJECTION |
13f00235 JK |
59 | if (time_to_inject(F2FS_P_SB(bio->bi_io_vec->bv_page), FAULT_IO)) { |
60 | f2fs_show_injection_info(FAULT_IO); | |
c1286ff4 | 61 | bio->bi_error = -EIO; |
13f00235 | 62 | } |
c1286ff4 JK |
63 | #endif |
64 | ||
4375a336 | 65 | if (f2fs_bio_encrypted(bio)) { |
4246a0b6 | 66 | if (bio->bi_error) { |
c1286ff4 | 67 | fscrypt_release_ctx(bio->bi_private); |
4375a336 | 68 | } else { |
c1286ff4 | 69 | fscrypt_decrypt_bio_pages(bio->bi_private, bio); |
4375a336 JK |
70 | return; |
71 | } | |
72 | } | |
73 | ||
12377024 CY |
74 | bio_for_each_segment_all(bvec, bio, i) { |
75 | struct page *page = bvec->bv_page; | |
f1e88660 | 76 | |
4246a0b6 | 77 | if (!bio->bi_error) { |
c1286ff4 JK |
78 | if (!PageUptodate(page)) |
79 | SetPageUptodate(page); | |
f1e88660 JK |
80 | } else { |
81 | ClearPageUptodate(page); | |
82 | SetPageError(page); | |
83 | } | |
84 | unlock_page(page); | |
85 | } | |
f1e88660 JK |
86 | bio_put(bio); |
87 | } | |
88 | ||
4246a0b6 | 89 | static void f2fs_write_end_io(struct bio *bio) |
93dfe2ac | 90 | { |
1b1f559f | 91 | struct f2fs_sb_info *sbi = bio->bi_private; |
f568849e LT |
92 | struct bio_vec *bvec; |
93 | int i; | |
93dfe2ac | 94 | |
f568849e | 95 | bio_for_each_segment_all(bvec, bio, i) { |
93dfe2ac | 96 | struct page *page = bvec->bv_page; |
9e266223 | 97 | enum count_type type = WB_DATA_TYPE(page); |
93dfe2ac | 98 | |
b3fcb700 JK |
99 | if (IS_DUMMY_WRITTEN_PAGE(page)) { |
100 | set_page_private(page, (unsigned long)NULL); | |
101 | ClearPagePrivate(page); | |
102 | unlock_page(page); | |
103 | mempool_free(page, sbi->write_io_dummy); | |
104 | ||
105 | if (unlikely(bio->bi_error)) | |
106 | f2fs_stop_checkpoint(sbi, true); | |
107 | continue; | |
108 | } | |
109 | ||
c1286ff4 | 110 | fscrypt_pullback_bio_page(&page, true); |
4375a336 | 111 | |
4246a0b6 | 112 | if (unlikely(bio->bi_error)) { |
93dfe2ac | 113 | set_bit(AS_EIO, &page->mapping->flags); |
c1286ff4 | 114 | f2fs_stop_checkpoint(sbi, true); |
93dfe2ac | 115 | } |
9e266223 CY |
116 | dec_page_count(sbi, type); |
117 | clear_cold_data(page); | |
93dfe2ac | 118 | end_page_writeback(page); |
f568849e | 119 | } |
9e266223 | 120 | if (!get_pages(sbi, F2FS_WB_CP_DATA) && |
c1286ff4 | 121 | wq_has_sleeper(&sbi->cp_wait)) |
93dfe2ac JK |
122 | wake_up(&sbi->cp_wait); |
123 | ||
124 | bio_put(bio); | |
125 | } | |
126 | ||
07f01079 JK |
127 | /* |
128 | * Return true, if pre_bio's bdev is same as its target device. | |
129 | */ | |
130 | struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi, | |
131 | block_t blk_addr, struct bio *bio) | |
132 | { | |
133 | struct block_device *bdev = sbi->sb->s_bdev; | |
134 | int i; | |
135 | ||
136 | for (i = 0; i < sbi->s_ndevs; i++) { | |
137 | if (FDEV(i).start_blk <= blk_addr && | |
138 | FDEV(i).end_blk >= blk_addr) { | |
139 | blk_addr -= FDEV(i).start_blk; | |
140 | bdev = FDEV(i).bdev; | |
141 | break; | |
142 | } | |
143 | } | |
144 | if (bio) { | |
145 | bio->bi_bdev = bdev; | |
146 | bio->bi_iter.bi_sector = SECTOR_FROM_BLOCK(blk_addr); | |
147 | } | |
148 | return bdev; | |
149 | } | |
150 | ||
151 | int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr) | |
152 | { | |
153 | int i; | |
154 | ||
155 | for (i = 0; i < sbi->s_ndevs; i++) | |
156 | if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr) | |
157 | return i; | |
158 | return 0; | |
159 | } | |
160 | ||
161 | static bool __same_bdev(struct f2fs_sb_info *sbi, | |
162 | block_t blk_addr, struct bio *bio) | |
163 | { | |
164 | return f2fs_target_device(sbi, blk_addr, NULL) == bio->bi_bdev; | |
165 | } | |
166 | ||
940a6d34 GZ |
167 | /* |
168 | * Low-level block read/write IO operations. | |
169 | */ | |
170 | static struct bio *__bio_alloc(struct f2fs_sb_info *sbi, block_t blk_addr, | |
171 | int npages, bool is_read) | |
172 | { | |
173 | struct bio *bio; | |
174 | ||
353c1624 | 175 | bio = f2fs_bio_alloc(sbi, npages, true); |
940a6d34 | 176 | |
07f01079 | 177 | f2fs_target_device(sbi, blk_addr, bio); |
940a6d34 | 178 | bio->bi_end_io = is_read ? f2fs_read_end_io : f2fs_write_end_io; |
12377024 | 179 | bio->bi_private = is_read ? NULL : sbi; |
940a6d34 GZ |
180 | |
181 | return bio; | |
182 | } | |
183 | ||
dc45fd9e JK |
184 | static inline void __submit_bio(struct f2fs_sb_info *sbi, |
185 | struct bio *bio, enum page_type type) | |
c1286ff4 | 186 | { |
dc45fd9e | 187 | if (!is_read_io(bio_op(bio))) { |
b3fcb700 JK |
188 | unsigned int start; |
189 | ||
22bbc1ef | 190 | if (f2fs_sb_mounted_blkzoned(sbi->sb) && |
c1286ff4 JK |
191 | current->plug && (type == DATA || type == NODE)) |
192 | blk_finish_plug(current->plug); | |
b3fcb700 JK |
193 | |
194 | if (type != DATA && type != NODE) | |
195 | goto submit_io; | |
196 | ||
197 | start = bio->bi_iter.bi_size >> F2FS_BLKSIZE_BITS; | |
198 | start %= F2FS_IO_SIZE(sbi); | |
199 | ||
200 | if (start == 0) | |
201 | goto submit_io; | |
202 | ||
203 | /* fill dummy pages */ | |
204 | for (; start < F2FS_IO_SIZE(sbi); start++) { | |
205 | struct page *page = | |
206 | mempool_alloc(sbi->write_io_dummy, | |
207 | GFP_NOIO | __GFP_ZERO | __GFP_NOFAIL); | |
208 | f2fs_bug_on(sbi, !page); | |
209 | ||
210 | SetPagePrivate(page); | |
211 | set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE); | |
212 | lock_page(page); | |
213 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) | |
214 | f2fs_bug_on(sbi, 1); | |
215 | } | |
216 | /* | |
217 | * In the NODE case, we lose next block address chain. So, we | |
218 | * need to do checkpoint in f2fs_sync_file. | |
219 | */ | |
220 | if (type == NODE) | |
221 | set_sbi_flag(sbi, SBI_NEED_CP); | |
c1286ff4 | 222 | } |
b3fcb700 | 223 | submit_io: |
8ef4f0ca JK |
224 | if (is_read_io(bio_op(bio))) |
225 | trace_f2fs_submit_read_bio(sbi->sb, type, bio); | |
226 | else | |
227 | trace_f2fs_submit_write_bio(sbi->sb, type, bio); | |
13f00235 | 228 | submit_bio(bio_op(bio), bio); |
c1286ff4 JK |
229 | } |
230 | ||
458e6197 | 231 | static void __submit_merged_bio(struct f2fs_bio_info *io) |
93dfe2ac | 232 | { |
458e6197 | 233 | struct f2fs_io_info *fio = &io->fio; |
93dfe2ac JK |
234 | |
235 | if (!io->bio) | |
236 | return; | |
237 | ||
8ef4f0ca JK |
238 | bio_set_op_attrs(io->bio, fio->op, fio->op_flags); |
239 | ||
dc45fd9e | 240 | if (is_read_io(fio->op)) |
8ef4f0ca | 241 | trace_f2fs_prepare_read_bio(io->sbi->sb, fio->type, io->bio); |
6a8f8ca5 | 242 | else |
8ef4f0ca | 243 | trace_f2fs_prepare_write_bio(io->sbi->sb, fio->type, io->bio); |
dc45fd9e JK |
244 | |
245 | __submit_bio(io->sbi, io->bio, fio->type); | |
93dfe2ac JK |
246 | io->bio = NULL; |
247 | } | |
248 | ||
13f00235 JK |
249 | static bool __has_merged_page(struct f2fs_bio_info *io, |
250 | struct inode *inode, nid_t ino, pgoff_t idx) | |
c1286ff4 JK |
251 | { |
252 | struct bio_vec *bvec; | |
253 | struct page *target; | |
254 | int i; | |
255 | ||
256 | if (!io->bio) | |
257 | return false; | |
258 | ||
13f00235 | 259 | if (!inode && !ino) |
c1286ff4 JK |
260 | return true; |
261 | ||
262 | bio_for_each_segment_all(bvec, io->bio, i) { | |
263 | ||
264 | if (bvec->bv_page->mapping) | |
265 | target = bvec->bv_page; | |
266 | else | |
267 | target = fscrypt_control_page(bvec->bv_page); | |
268 | ||
13f00235 JK |
269 | if (idx != target->index) |
270 | continue; | |
271 | ||
c1286ff4 JK |
272 | if (inode && inode == target->mapping->host) |
273 | return true; | |
c1286ff4 JK |
274 | if (ino && ino == ino_of_node(target)) |
275 | return true; | |
276 | } | |
277 | ||
278 | return false; | |
279 | } | |
280 | ||
281 | static bool has_merged_page(struct f2fs_sb_info *sbi, struct inode *inode, | |
13f00235 | 282 | nid_t ino, pgoff_t idx, enum page_type type) |
c1286ff4 JK |
283 | { |
284 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
13f00235 JK |
285 | enum temp_type temp; |
286 | struct f2fs_bio_info *io; | |
287 | bool ret = false; | |
288 | ||
289 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { | |
290 | io = sbi->write_io[btype] + temp; | |
c1286ff4 | 291 | |
13f00235 JK |
292 | down_read(&io->io_rwsem); |
293 | ret = __has_merged_page(io, inode, ino, idx); | |
294 | up_read(&io->io_rwsem); | |
295 | ||
296 | /* TODO: use HOT temp only for meta pages now. */ | |
297 | if (ret || btype == META) | |
298 | break; | |
299 | } | |
c1286ff4 JK |
300 | return ret; |
301 | } | |
302 | ||
13f00235 JK |
303 | static void __f2fs_submit_merged_write(struct f2fs_sb_info *sbi, |
304 | enum page_type type, enum temp_type temp) | |
93dfe2ac JK |
305 | { |
306 | enum page_type btype = PAGE_TYPE_OF_BIO(type); | |
13f00235 | 307 | struct f2fs_bio_info *io = sbi->write_io[btype] + temp; |
93dfe2ac | 308 | |
df0f8dc0 | 309 | down_write(&io->io_rwsem); |
458e6197 JK |
310 | |
311 | /* change META to META_FLUSH in the checkpoint procedure */ | |
312 | if (type >= META_FLUSH) { | |
313 | io->fio.type = META_FLUSH; | |
dc45fd9e | 314 | io->fio.op = REQ_OP_WRITE; |
13f00235 | 315 | io->fio.op_flags = REQ_META | REQ_PRIO; |
dc45fd9e | 316 | if (!test_opt(sbi, NOBARRIER)) |
13f00235 | 317 | io->fio.op_flags |= WRITE_FLUSH | REQ_FUA; |
458e6197 JK |
318 | } |
319 | __submit_merged_bio(io); | |
df0f8dc0 | 320 | up_write(&io->io_rwsem); |
93dfe2ac JK |
321 | } |
322 | ||
13f00235 JK |
323 | static void __submit_merged_write_cond(struct f2fs_sb_info *sbi, |
324 | struct inode *inode, nid_t ino, pgoff_t idx, | |
325 | enum page_type type, bool force) | |
326 | { | |
327 | enum temp_type temp; | |
328 | ||
329 | if (!force && !has_merged_page(sbi, inode, ino, idx, type)) | |
330 | return; | |
331 | ||
332 | for (temp = HOT; temp < NR_TEMP_TYPE; temp++) { | |
333 | ||
334 | __f2fs_submit_merged_write(sbi, type, temp); | |
335 | ||
336 | /* TODO: use HOT temp only for meta pages now. */ | |
337 | if (type >= META) | |
338 | break; | |
339 | } | |
340 | } | |
341 | ||
342 | void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type) | |
c1286ff4 | 343 | { |
13f00235 | 344 | __submit_merged_write_cond(sbi, NULL, 0, 0, type, true); |
c1286ff4 JK |
345 | } |
346 | ||
13f00235 JK |
347 | void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi, |
348 | struct inode *inode, nid_t ino, pgoff_t idx, | |
349 | enum page_type type) | |
c1286ff4 | 350 | { |
13f00235 | 351 | __submit_merged_write_cond(sbi, inode, ino, idx, type, false); |
c1286ff4 JK |
352 | } |
353 | ||
13f00235 | 354 | void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi) |
c1286ff4 | 355 | { |
13f00235 JK |
356 | f2fs_submit_merged_write(sbi, DATA); |
357 | f2fs_submit_merged_write(sbi, NODE); | |
358 | f2fs_submit_merged_write(sbi, META); | |
c1286ff4 JK |
359 | } |
360 | ||
93dfe2ac JK |
361 | /* |
362 | * Fill the locked page with data located in the block address. | |
13f00235 | 363 | * A caller needs to unlock the page on failure. |
93dfe2ac | 364 | */ |
05ca3632 | 365 | int f2fs_submit_page_bio(struct f2fs_io_info *fio) |
93dfe2ac | 366 | { |
93dfe2ac | 367 | struct bio *bio; |
c1286ff4 JK |
368 | struct page *page = fio->encrypted_page ? |
369 | fio->encrypted_page : fio->page; | |
93dfe2ac | 370 | |
2ace38e0 | 371 | trace_f2fs_submit_page_bio(page, fio); |
05ca3632 | 372 | f2fs_trace_ios(fio, 0); |
93dfe2ac JK |
373 | |
374 | /* Allocate a new bio */ | |
dc45fd9e | 375 | bio = __bio_alloc(fio->sbi, fio->new_blkaddr, 1, is_read_io(fio->op)); |
93dfe2ac | 376 | |
c1286ff4 | 377 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { |
93dfe2ac | 378 | bio_put(bio); |
93dfe2ac JK |
379 | return -EFAULT; |
380 | } | |
dc45fd9e | 381 | bio_set_op_attrs(bio, fio->op, fio->op_flags); |
93dfe2ac | 382 | |
dc45fd9e | 383 | __submit_bio(fio->sbi, bio, fio->type); |
13f00235 JK |
384 | |
385 | if (!is_read_io(fio->op)) | |
386 | inc_page_count(fio->sbi, WB_DATA_TYPE(fio->page)); | |
93dfe2ac JK |
387 | return 0; |
388 | } | |
389 | ||
13f00235 | 390 | int f2fs_submit_page_write(struct f2fs_io_info *fio) |
93dfe2ac | 391 | { |
05ca3632 | 392 | struct f2fs_sb_info *sbi = fio->sbi; |
458e6197 | 393 | enum page_type btype = PAGE_TYPE_OF_BIO(fio->type); |
13f00235 | 394 | struct f2fs_bio_info *io = sbi->write_io[btype] + fio->temp; |
4375a336 | 395 | struct page *bio_page; |
b3fcb700 | 396 | int err = 0; |
93dfe2ac | 397 | |
13f00235 JK |
398 | f2fs_bug_on(sbi, is_read_io(fio->op)); |
399 | ||
400 | down_write(&io->io_rwsem); | |
401 | next: | |
402 | if (fio->in_list) { | |
403 | spin_lock(&io->io_lock); | |
404 | if (list_empty(&io->io_list)) { | |
405 | spin_unlock(&io->io_lock); | |
406 | goto out_fail; | |
407 | } | |
408 | fio = list_first_entry(&io->io_list, | |
409 | struct f2fs_io_info, list); | |
410 | list_del(&fio->list); | |
411 | spin_unlock(&io->io_lock); | |
412 | } | |
93dfe2ac | 413 | |
c1286ff4 JK |
414 | if (fio->old_blkaddr != NEW_ADDR) |
415 | verify_block_addr(sbi, fio->old_blkaddr); | |
416 | verify_block_addr(sbi, fio->new_blkaddr); | |
93dfe2ac | 417 | |
9e266223 CY |
418 | bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page; |
419 | ||
353c1624 JK |
420 | /* set submitted = true as a return value */ |
421 | fio->submitted = true; | |
9e266223 | 422 | |
13f00235 | 423 | inc_page_count(sbi, WB_DATA_TYPE(bio_page)); |
93dfe2ac | 424 | |
c1286ff4 | 425 | if (io->bio && (io->last_block_in_bio != fio->new_blkaddr - 1 || |
dc45fd9e | 426 | (io->fio.op != fio->op || io->fio.op_flags != fio->op_flags) || |
07f01079 | 427 | !__same_bdev(sbi, fio->new_blkaddr, io->bio))) |
458e6197 | 428 | __submit_merged_bio(io); |
93dfe2ac JK |
429 | alloc_new: |
430 | if (io->bio == NULL) { | |
b3fcb700 JK |
431 | if ((fio->type == DATA || fio->type == NODE) && |
432 | fio->new_blkaddr & F2FS_IO_SIZE_MASK(sbi)) { | |
433 | err = -EAGAIN; | |
434 | dec_page_count(sbi, WB_DATA_TYPE(bio_page)); | |
435 | goto out_fail; | |
436 | } | |
c1286ff4 | 437 | io->bio = __bio_alloc(sbi, fio->new_blkaddr, |
13f00235 | 438 | BIO_MAX_PAGES, false); |
458e6197 | 439 | io->fio = *fio; |
93dfe2ac JK |
440 | } |
441 | ||
13f00235 | 442 | if (bio_add_page(io->bio, bio_page, PAGE_SIZE, 0) < PAGE_SIZE) { |
458e6197 | 443 | __submit_merged_bio(io); |
93dfe2ac JK |
444 | goto alloc_new; |
445 | } | |
446 | ||
c1286ff4 | 447 | io->last_block_in_bio = fio->new_blkaddr; |
05ca3632 | 448 | f2fs_trace_ios(fio, 0); |
13f00235 JK |
449 | |
450 | trace_f2fs_submit_page_write(fio->page, fio); | |
451 | ||
452 | if (fio->in_list) | |
453 | goto next; | |
b3fcb700 | 454 | out_fail: |
df0f8dc0 | 455 | up_write(&io->io_rwsem); |
b3fcb700 | 456 | return err; |
93dfe2ac JK |
457 | } |
458 | ||
13f00235 JK |
459 | static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr, |
460 | unsigned nr_pages) | |
461 | { | |
462 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); | |
463 | struct fscrypt_ctx *ctx = NULL; | |
464 | struct bio *bio; | |
465 | ||
466 | if (f2fs_encrypted_file(inode)) { | |
467 | ctx = fscrypt_get_ctx(inode, GFP_NOFS); | |
468 | if (IS_ERR(ctx)) | |
469 | return ERR_CAST(ctx); | |
470 | ||
471 | /* wait the page to be moved by cleaning */ | |
472 | f2fs_wait_on_block_writeback(sbi, blkaddr); | |
473 | } | |
474 | ||
353c1624 | 475 | bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false); |
13f00235 JK |
476 | if (!bio) { |
477 | if (ctx) | |
478 | fscrypt_release_ctx(ctx); | |
479 | return ERR_PTR(-ENOMEM); | |
480 | } | |
481 | f2fs_target_device(sbi, blkaddr, bio); | |
482 | bio->bi_end_io = f2fs_read_end_io; | |
483 | bio->bi_private = ctx; | |
484 | bio_set_op_attrs(bio, REQ_OP_READ, 0); | |
485 | ||
486 | return bio; | |
487 | } | |
488 | ||
489 | /* This can handle encryption stuffs */ | |
490 | static int f2fs_submit_page_read(struct inode *inode, struct page *page, | |
491 | block_t blkaddr) | |
492 | { | |
493 | struct bio *bio = f2fs_grab_read_bio(inode, blkaddr, 1); | |
494 | ||
495 | if (IS_ERR(bio)) | |
496 | return PTR_ERR(bio); | |
497 | ||
498 | if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) { | |
499 | bio_put(bio); | |
500 | return -EFAULT; | |
501 | } | |
502 | __submit_bio(F2FS_I_SB(inode), bio, DATA); | |
503 | return 0; | |
504 | } | |
505 | ||
c1286ff4 JK |
506 | static void __set_data_blkaddr(struct dnode_of_data *dn) |
507 | { | |
508 | struct f2fs_node *rn = F2FS_NODE(dn->node_page); | |
509 | __le32 *addr_array; | |
13f00235 JK |
510 | int base = 0; |
511 | ||
512 | if (IS_INODE(dn->node_page) && f2fs_has_extra_attr(dn->inode)) | |
513 | base = get_extra_isize(dn->inode); | |
c1286ff4 JK |
514 | |
515 | /* Get physical address of data block */ | |
516 | addr_array = blkaddr_in_node(rn); | |
13f00235 | 517 | addr_array[base + dn->ofs_in_node] = cpu_to_le32(dn->data_blkaddr); |
c1286ff4 JK |
518 | } |
519 | ||
0a8165d7 | 520 | /* |
eb47b800 JK |
521 | * Lock ordering for the change of data block address: |
522 | * ->data_page | |
523 | * ->node_page | |
524 | * update block addresses in the node page | |
525 | */ | |
216a620a | 526 | void set_data_blkaddr(struct dnode_of_data *dn) |
eb47b800 | 527 | { |
c1286ff4 JK |
528 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
529 | __set_data_blkaddr(dn); | |
530 | if (set_page_dirty(dn->node_page)) | |
531 | dn->node_changed = true; | |
532 | } | |
eb47b800 | 533 | |
c1286ff4 JK |
534 | void f2fs_update_data_blkaddr(struct dnode_of_data *dn, block_t blkaddr) |
535 | { | |
536 | dn->data_blkaddr = blkaddr; | |
537 | set_data_blkaddr(dn); | |
538 | f2fs_update_extent_cache(dn); | |
eb47b800 JK |
539 | } |
540 | ||
c1286ff4 JK |
541 | /* dn->ofs_in_node will be returned with up-to-date last block pointer */ |
542 | int reserve_new_blocks(struct dnode_of_data *dn, blkcnt_t count) | |
eb47b800 | 543 | { |
4081363f | 544 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
13f00235 | 545 | int err; |
eb47b800 | 546 | |
c1286ff4 JK |
547 | if (!count) |
548 | return 0; | |
549 | ||
550 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) | |
eb47b800 | 551 | return -EPERM; |
13f00235 JK |
552 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
553 | return err; | |
eb47b800 | 554 | |
c1286ff4 JK |
555 | trace_f2fs_reserve_new_blocks(dn->inode, dn->nid, |
556 | dn->ofs_in_node, count); | |
c01e2853 | 557 | |
c1286ff4 JK |
558 | f2fs_wait_on_page_writeback(dn->node_page, NODE, true); |
559 | ||
560 | for (; count > 0; dn->ofs_in_node++) { | |
13f00235 JK |
561 | block_t blkaddr = datablock_addr(dn->inode, |
562 | dn->node_page, dn->ofs_in_node); | |
c1286ff4 JK |
563 | if (blkaddr == NULL_ADDR) { |
564 | dn->data_blkaddr = NEW_ADDR; | |
565 | __set_data_blkaddr(dn); | |
566 | count--; | |
567 | } | |
568 | } | |
569 | ||
570 | if (set_page_dirty(dn->node_page)) | |
571 | dn->node_changed = true; | |
eb47b800 JK |
572 | return 0; |
573 | } | |
574 | ||
c1286ff4 JK |
575 | /* Should keep dn->ofs_in_node unchanged */ |
576 | int reserve_new_block(struct dnode_of_data *dn) | |
577 | { | |
578 | unsigned int ofs_in_node = dn->ofs_in_node; | |
579 | int ret; | |
580 | ||
581 | ret = reserve_new_blocks(dn, 1); | |
582 | dn->ofs_in_node = ofs_in_node; | |
583 | return ret; | |
584 | } | |
585 | ||
b600965c HL |
586 | int f2fs_reserve_block(struct dnode_of_data *dn, pgoff_t index) |
587 | { | |
588 | bool need_put = dn->inode_page ? false : true; | |
589 | int err; | |
590 | ||
591 | err = get_dnode_of_data(dn, index, ALLOC_NODE); | |
592 | if (err) | |
593 | return err; | |
a8865372 | 594 | |
b600965c HL |
595 | if (dn->data_blkaddr == NULL_ADDR) |
596 | err = reserve_new_block(dn); | |
a8865372 | 597 | if (err || need_put) |
b600965c HL |
598 | f2fs_put_dnode(dn); |
599 | return err; | |
600 | } | |
601 | ||
759af1c9 | 602 | int f2fs_get_block(struct dnode_of_data *dn, pgoff_t index) |
eb47b800 | 603 | { |
13f00235 | 604 | struct extent_info ei = {0,0,0}; |
759af1c9 | 605 | struct inode *inode = dn->inode; |
028a41e8 | 606 | |
759af1c9 FL |
607 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
608 | dn->data_blkaddr = ei.blk + index - ei.fofs; | |
609 | return 0; | |
429511cd | 610 | } |
028a41e8 | 611 | |
759af1c9 | 612 | return f2fs_reserve_block(dn, index); |
eb47b800 JK |
613 | } |
614 | ||
a56c7c6f | 615 | struct page *get_read_data_page(struct inode *inode, pgoff_t index, |
dc45fd9e | 616 | int op_flags, bool for_write) |
eb47b800 | 617 | { |
eb47b800 JK |
618 | struct address_space *mapping = inode->i_mapping; |
619 | struct dnode_of_data dn; | |
620 | struct page *page; | |
13f00235 | 621 | struct extent_info ei = {0,0,0}; |
eb47b800 | 622 | int err; |
4375a336 | 623 | |
a56c7c6f | 624 | page = f2fs_grab_cache_page(mapping, index, for_write); |
650495de JK |
625 | if (!page) |
626 | return ERR_PTR(-ENOMEM); | |
627 | ||
cb3bc9ee CY |
628 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { |
629 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
630 | goto got_it; | |
631 | } | |
632 | ||
eb47b800 | 633 | set_new_dnode(&dn, inode, NULL, NULL, 0); |
266e97a8 | 634 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); |
86531d6b JK |
635 | if (err) |
636 | goto put_err; | |
eb47b800 JK |
637 | f2fs_put_dnode(&dn); |
638 | ||
6bacf52f | 639 | if (unlikely(dn.data_blkaddr == NULL_ADDR)) { |
86531d6b JK |
640 | err = -ENOENT; |
641 | goto put_err; | |
650495de | 642 | } |
cb3bc9ee | 643 | got_it: |
43f3eae1 JK |
644 | if (PageUptodate(page)) { |
645 | unlock_page(page); | |
eb47b800 | 646 | return page; |
43f3eae1 | 647 | } |
eb47b800 | 648 | |
d59ff4df JK |
649 | /* |
650 | * A new dentry page is allocated but not able to be written, since its | |
651 | * new inode page couldn't be allocated due to -ENOSPC. | |
652 | * In such the case, its blkaddr can be remained as NEW_ADDR. | |
653 | * see, f2fs_add_link -> get_new_data_page -> init_inode_metadata. | |
654 | */ | |
655 | if (dn.data_blkaddr == NEW_ADDR) { | |
c1286ff4 JK |
656 | zero_user_segment(page, 0, PAGE_SIZE); |
657 | if (!PageUptodate(page)) | |
658 | SetPageUptodate(page); | |
43f3eae1 | 659 | unlock_page(page); |
d59ff4df JK |
660 | return page; |
661 | } | |
eb47b800 | 662 | |
13f00235 | 663 | err = f2fs_submit_page_read(inode, page, dn.data_blkaddr); |
393ff91f | 664 | if (err) |
86531d6b | 665 | goto put_err; |
43f3eae1 | 666 | return page; |
86531d6b JK |
667 | |
668 | put_err: | |
669 | f2fs_put_page(page, 1); | |
670 | return ERR_PTR(err); | |
43f3eae1 JK |
671 | } |
672 | ||
673 | struct page *find_data_page(struct inode *inode, pgoff_t index) | |
674 | { | |
675 | struct address_space *mapping = inode->i_mapping; | |
676 | struct page *page; | |
677 | ||
678 | page = find_get_page(mapping, index); | |
679 | if (page && PageUptodate(page)) | |
680 | return page; | |
681 | f2fs_put_page(page, 0); | |
682 | ||
dc45fd9e | 683 | page = get_read_data_page(inode, index, REQ_SYNC, false); |
43f3eae1 JK |
684 | if (IS_ERR(page)) |
685 | return page; | |
686 | ||
687 | if (PageUptodate(page)) | |
688 | return page; | |
689 | ||
690 | wait_on_page_locked(page); | |
691 | if (unlikely(!PageUptodate(page))) { | |
692 | f2fs_put_page(page, 0); | |
693 | return ERR_PTR(-EIO); | |
694 | } | |
695 | return page; | |
696 | } | |
697 | ||
698 | /* | |
699 | * If it tries to access a hole, return an error. | |
700 | * Because, the callers, functions in dir.c and GC, should be able to know | |
701 | * whether this page exists or not. | |
702 | */ | |
a56c7c6f JK |
703 | struct page *get_lock_data_page(struct inode *inode, pgoff_t index, |
704 | bool for_write) | |
43f3eae1 JK |
705 | { |
706 | struct address_space *mapping = inode->i_mapping; | |
707 | struct page *page; | |
708 | repeat: | |
dc45fd9e | 709 | page = get_read_data_page(inode, index, REQ_SYNC, for_write); |
43f3eae1 JK |
710 | if (IS_ERR(page)) |
711 | return page; | |
393ff91f | 712 | |
43f3eae1 | 713 | /* wait for read completion */ |
393ff91f | 714 | lock_page(page); |
6bacf52f | 715 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
716 | f2fs_put_page(page, 1); |
717 | goto repeat; | |
eb47b800 | 718 | } |
c1286ff4 JK |
719 | if (unlikely(!PageUptodate(page))) { |
720 | f2fs_put_page(page, 1); | |
721 | return ERR_PTR(-EIO); | |
722 | } | |
eb47b800 JK |
723 | return page; |
724 | } | |
725 | ||
0a8165d7 | 726 | /* |
eb47b800 JK |
727 | * Caller ensures that this data page is never allocated. |
728 | * A new zero-filled data page is allocated in the page cache. | |
39936837 | 729 | * |
4f4124d0 CY |
730 | * Also, caller should grab and release a rwsem by calling f2fs_lock_op() and |
731 | * f2fs_unlock_op(). | |
470f00e9 CY |
732 | * Note that, ipage is set only by make_empty_dir, and if any error occur, |
733 | * ipage should be released by this function. | |
eb47b800 | 734 | */ |
64aa7ed9 | 735 | struct page *get_new_data_page(struct inode *inode, |
a8865372 | 736 | struct page *ipage, pgoff_t index, bool new_i_size) |
eb47b800 | 737 | { |
eb47b800 JK |
738 | struct address_space *mapping = inode->i_mapping; |
739 | struct page *page; | |
740 | struct dnode_of_data dn; | |
741 | int err; | |
c1286ff4 | 742 | |
a56c7c6f | 743 | page = f2fs_grab_cache_page(mapping, index, true); |
470f00e9 CY |
744 | if (!page) { |
745 | /* | |
746 | * before exiting, we should make sure ipage will be released | |
747 | * if any error occur. | |
748 | */ | |
749 | f2fs_put_page(ipage, 1); | |
01f28610 | 750 | return ERR_PTR(-ENOMEM); |
470f00e9 | 751 | } |
eb47b800 | 752 | |
a8865372 | 753 | set_new_dnode(&dn, inode, ipage, NULL, 0); |
b600965c | 754 | err = f2fs_reserve_block(&dn, index); |
01f28610 JK |
755 | if (err) { |
756 | f2fs_put_page(page, 1); | |
eb47b800 | 757 | return ERR_PTR(err); |
a8865372 | 758 | } |
01f28610 JK |
759 | if (!ipage) |
760 | f2fs_put_dnode(&dn); | |
eb47b800 JK |
761 | |
762 | if (PageUptodate(page)) | |
01f28610 | 763 | goto got_it; |
eb47b800 JK |
764 | |
765 | if (dn.data_blkaddr == NEW_ADDR) { | |
c1286ff4 JK |
766 | zero_user_segment(page, 0, PAGE_SIZE); |
767 | if (!PageUptodate(page)) | |
768 | SetPageUptodate(page); | |
eb47b800 | 769 | } else { |
4375a336 | 770 | f2fs_put_page(page, 1); |
a8865372 | 771 | |
c1286ff4 JK |
772 | /* if ipage exists, blkaddr should be NEW_ADDR */ |
773 | f2fs_bug_on(F2FS_I_SB(inode), ipage); | |
774 | page = get_lock_data_page(inode, index, true); | |
4375a336 | 775 | if (IS_ERR(page)) |
c1286ff4 | 776 | return page; |
eb47b800 | 777 | } |
01f28610 | 778 | got_it: |
9edcdabf | 779 | if (new_i_size && i_size_read(inode) < |
c1286ff4 JK |
780 | ((loff_t)(index + 1) << PAGE_SHIFT)) |
781 | f2fs_i_size_write(inode, ((loff_t)(index + 1) << PAGE_SHIFT)); | |
eb47b800 JK |
782 | return page; |
783 | } | |
784 | ||
bfad7c2d JK |
785 | static int __allocate_data_block(struct dnode_of_data *dn) |
786 | { | |
4081363f | 787 | struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode); |
bfad7c2d | 788 | struct f2fs_summary sum; |
bfad7c2d | 789 | struct node_info ni; |
976e4c50 | 790 | pgoff_t fofs; |
c1286ff4 | 791 | blkcnt_t count = 1; |
13f00235 | 792 | int err; |
bfad7c2d | 793 | |
c1286ff4 | 794 | if (unlikely(is_inode_flag_set(dn->inode, FI_NO_ALLOC))) |
bfad7c2d | 795 | return -EPERM; |
df6136ef | 796 | |
13f00235 JK |
797 | dn->data_blkaddr = datablock_addr(dn->inode, |
798 | dn->node_page, dn->ofs_in_node); | |
df6136ef CY |
799 | if (dn->data_blkaddr == NEW_ADDR) |
800 | goto alloc; | |
801 | ||
13f00235 JK |
802 | if (unlikely((err = inc_valid_block_count(sbi, dn->inode, &count)))) |
803 | return err; | |
bfad7c2d | 804 | |
df6136ef | 805 | alloc: |
bfad7c2d JK |
806 | get_node_info(sbi, dn->nid, &ni); |
807 | set_summary(&sum, dn->nid, dn->ofs_in_node, ni.version); | |
808 | ||
df6136ef | 809 | allocate_data_block(sbi, NULL, dn->data_blkaddr, &dn->data_blkaddr, |
13f00235 | 810 | &sum, CURSEG_WARM_DATA, NULL, false); |
216a620a | 811 | set_data_blkaddr(dn); |
bfad7c2d | 812 | |
976e4c50 | 813 | /* update i_size */ |
c1286ff4 | 814 | fofs = start_bidx_of_node(ofs_of_node(dn->node_page), dn->inode) + |
976e4c50 | 815 | dn->ofs_in_node; |
c1286ff4 JK |
816 | if (i_size_read(dn->inode) < ((loff_t)(fofs + 1) << PAGE_SHIFT)) |
817 | f2fs_i_size_write(dn->inode, | |
818 | ((loff_t)(fofs + 1) << PAGE_SHIFT)); | |
bfad7c2d JK |
819 | return 0; |
820 | } | |
821 | ||
8b2c7581 JK |
822 | static inline bool __force_buffered_io(struct inode *inode, int rw) |
823 | { | |
13f00235 | 824 | return (f2fs_encrypted_file(inode) || |
8b2c7581 JK |
825 | (rw == WRITE && test_opt(F2FS_I_SB(inode), LFS)) || |
826 | F2FS_I_SB(inode)->s_ndevs); | |
827 | } | |
828 | ||
bd8e4154 | 829 | int f2fs_preallocate_blocks(struct kiocb *iocb, struct iov_iter *from) |
59b802e5 | 830 | { |
c1286ff4 JK |
831 | struct inode *inode = file_inode(iocb->ki_filp); |
832 | struct f2fs_map_blocks map; | |
bd8e4154 | 833 | int err = 0; |
f9811703 | 834 | |
353c1624 JK |
835 | /* convert inline data for Direct I/O*/ |
836 | if (iocb->ki_flags & IOCB_DIRECT) { | |
837 | err = f2fs_convert_inline_inode(inode); | |
838 | if (err) | |
839 | return err; | |
840 | } | |
841 | ||
13f00235 JK |
842 | if (is_inode_flag_set(inode, FI_NO_PREALLOC)) |
843 | return 0; | |
844 | ||
c1286ff4 JK |
845 | map.m_lblk = F2FS_BLK_ALIGN(iocb->ki_pos); |
846 | map.m_len = F2FS_BYTES_TO_BLK(iocb->ki_pos + iov_iter_count(from)); | |
847 | if (map.m_len > map.m_lblk) | |
848 | map.m_len -= map.m_lblk; | |
849 | else | |
850 | map.m_len = 0; | |
59b802e5 | 851 | |
c1286ff4 | 852 | map.m_next_pgofs = NULL; |
59b802e5 | 853 | |
353c1624 | 854 | if (iocb->ki_flags & IOCB_DIRECT) |
8b2c7581 JK |
855 | return f2fs_map_blocks(inode, &map, 1, |
856 | __force_buffered_io(inode, WRITE) ? | |
857 | F2FS_GET_BLOCK_PRE_AIO : | |
858 | F2FS_GET_BLOCK_PRE_DIO); | |
13f00235 | 859 | if (iocb->ki_pos + iov_iter_count(from) > MAX_INLINE_DATA(inode)) { |
bd8e4154 JK |
860 | err = f2fs_convert_inline_inode(inode); |
861 | if (err) | |
862 | return err; | |
c1286ff4 JK |
863 | } |
864 | if (!f2fs_has_inline_data(inode)) | |
865 | return f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO); | |
bd8e4154 | 866 | return err; |
59b802e5 JK |
867 | } |
868 | ||
13f00235 JK |
869 | static inline void __do_map_lock(struct f2fs_sb_info *sbi, int flag, bool lock) |
870 | { | |
871 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { | |
872 | if (lock) | |
873 | down_read(&sbi->node_change); | |
874 | else | |
875 | up_read(&sbi->node_change); | |
876 | } else { | |
877 | if (lock) | |
878 | f2fs_lock_op(sbi); | |
879 | else | |
880 | f2fs_unlock_op(sbi); | |
881 | } | |
882 | } | |
883 | ||
0a8165d7 | 884 | /* |
003a3e1d JK |
885 | * f2fs_map_blocks() now supported readahead/bmap/rw direct_IO with |
886 | * f2fs_map_blocks structure. | |
4f4124d0 CY |
887 | * If original data blocks are allocated, then give them to blockdev. |
888 | * Otherwise, | |
889 | * a. preallocate requested block addresses | |
890 | * b. do not use extent cache for better performance | |
891 | * c. give the block addresses to blockdev | |
eb47b800 | 892 | */ |
c1286ff4 | 893 | int f2fs_map_blocks(struct inode *inode, struct f2fs_map_blocks *map, |
e2b4e2bc | 894 | int create, int flag) |
eb47b800 | 895 | { |
003a3e1d | 896 | unsigned int maxblocks = map->m_len; |
eb47b800 | 897 | struct dnode_of_data dn; |
f9811703 | 898 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
c1286ff4 JK |
899 | int mode = create ? ALLOC_NODE : LOOKUP_NODE; |
900 | pgoff_t pgofs, end_offset, end; | |
bfad7c2d | 901 | int err = 0, ofs = 1; |
c1286ff4 JK |
902 | unsigned int ofs_in_node, last_ofs_in_node; |
903 | blkcnt_t prealloc; | |
13f00235 | 904 | struct extent_info ei = {0,0,0}; |
c1286ff4 JK |
905 | block_t blkaddr; |
906 | ||
907 | if (!maxblocks) | |
908 | return 0; | |
eb47b800 | 909 | |
003a3e1d JK |
910 | map->m_len = 0; |
911 | map->m_flags = 0; | |
912 | ||
913 | /* it only supports block size == page size */ | |
914 | pgofs = (pgoff_t)map->m_lblk; | |
c1286ff4 | 915 | end = pgofs + maxblocks; |
eb47b800 | 916 | |
c1286ff4 | 917 | if (!create && f2fs_lookup_extent_cache(inode, pgofs, &ei)) { |
003a3e1d JK |
918 | map->m_pblk = ei.blk + pgofs - ei.fofs; |
919 | map->m_len = min((pgoff_t)maxblocks, ei.fofs + ei.len - pgofs); | |
920 | map->m_flags = F2FS_MAP_MAPPED; | |
bfad7c2d | 921 | goto out; |
a2e7d1bf | 922 | } |
bfad7c2d | 923 | |
c1286ff4 | 924 | next_dnode: |
59b802e5 | 925 | if (create) |
13f00235 | 926 | __do_map_lock(sbi, flag, true); |
eb47b800 JK |
927 | |
928 | /* When reading holes, we need its node page */ | |
929 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
bfad7c2d | 930 | err = get_dnode_of_data(&dn, pgofs, mode); |
1ec79083 | 931 | if (err) { |
c1286ff4 JK |
932 | if (flag == F2FS_GET_BLOCK_BMAP) |
933 | map->m_pblk = 0; | |
934 | if (err == -ENOENT) { | |
bfad7c2d | 935 | err = 0; |
c1286ff4 JK |
936 | if (map->m_next_pgofs) |
937 | *map->m_next_pgofs = | |
938 | get_next_page_offset(&dn, pgofs); | |
939 | } | |
bfad7c2d | 940 | goto unlock_out; |
848753aa | 941 | } |
973163fc | 942 | |
c1286ff4 | 943 | prealloc = 0; |
b3441f8c | 944 | last_ofs_in_node = ofs_in_node = dn.ofs_in_node; |
c1286ff4 JK |
945 | end_offset = ADDRS_PER_PAGE(dn.node_page, inode); |
946 | ||
947 | next_block: | |
13f00235 | 948 | blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node); |
c1286ff4 JK |
949 | |
950 | if (blkaddr == NEW_ADDR || blkaddr == NULL_ADDR) { | |
973163fc | 951 | if (create) { |
f9811703 CY |
952 | if (unlikely(f2fs_cp_error(sbi))) { |
953 | err = -EIO; | |
c1286ff4 JK |
954 | goto sync_out; |
955 | } | |
956 | if (flag == F2FS_GET_BLOCK_PRE_AIO) { | |
957 | if (blkaddr == NULL_ADDR) { | |
958 | prealloc++; | |
959 | last_ofs_in_node = dn.ofs_in_node; | |
960 | } | |
961 | } else { | |
962 | err = __allocate_data_block(&dn); | |
332f40b4 | 963 | if (!err) |
c1286ff4 | 964 | set_inode_flag(inode, FI_APPEND_WRITE); |
f9811703 | 965 | } |
973163fc | 966 | if (err) |
c1286ff4 | 967 | goto sync_out; |
13f00235 | 968 | map->m_flags |= F2FS_MAP_NEW; |
c1286ff4 | 969 | blkaddr = dn.data_blkaddr; |
973163fc | 970 | } else { |
c1286ff4 JK |
971 | if (flag == F2FS_GET_BLOCK_BMAP) { |
972 | map->m_pblk = 0; | |
973 | goto sync_out; | |
973163fc | 974 | } |
c1286ff4 JK |
975 | if (flag == F2FS_GET_BLOCK_FIEMAP && |
976 | blkaddr == NULL_ADDR) { | |
977 | if (map->m_next_pgofs) | |
978 | *map->m_next_pgofs = pgofs + 1; | |
979 | } | |
980 | if (flag != F2FS_GET_BLOCK_FIEMAP || | |
981 | blkaddr != NEW_ADDR) | |
982 | goto sync_out; | |
e2b4e2bc | 983 | } |
e2b4e2bc | 984 | } |
eb47b800 | 985 | |
c1286ff4 JK |
986 | if (flag == F2FS_GET_BLOCK_PRE_AIO) |
987 | goto skip; | |
988 | ||
989 | if (map->m_len == 0) { | |
990 | /* preallocated unwritten block should be mapped for fiemap. */ | |
991 | if (blkaddr == NEW_ADDR) | |
992 | map->m_flags |= F2FS_MAP_UNWRITTEN; | |
993 | map->m_flags |= F2FS_MAP_MAPPED; | |
994 | ||
995 | map->m_pblk = blkaddr; | |
996 | map->m_len = 1; | |
997 | } else if ((map->m_pblk != NEW_ADDR && | |
998 | blkaddr == (map->m_pblk + ofs)) || | |
999 | (map->m_pblk == NEW_ADDR && blkaddr == NEW_ADDR) || | |
1000 | flag == F2FS_GET_BLOCK_PRE_DIO) { | |
1001 | ofs++; | |
1002 | map->m_len++; | |
1003 | } else { | |
1004 | goto sync_out; | |
1005 | } | |
bfad7c2d | 1006 | |
c1286ff4 | 1007 | skip: |
bfad7c2d JK |
1008 | dn.ofs_in_node++; |
1009 | pgofs++; | |
1010 | ||
c1286ff4 JK |
1011 | /* preallocate blocks in batch for one dnode page */ |
1012 | if (flag == F2FS_GET_BLOCK_PRE_AIO && | |
1013 | (pgofs == end || dn.ofs_in_node == end_offset)) { | |
bfad7c2d | 1014 | |
c1286ff4 JK |
1015 | dn.ofs_in_node = ofs_in_node; |
1016 | err = reserve_new_blocks(&dn, prealloc); | |
1017 | if (err) | |
1018 | goto sync_out; | |
e2b4e2bc | 1019 | |
c1286ff4 JK |
1020 | map->m_len += dn.ofs_in_node - ofs_in_node; |
1021 | if (prealloc && dn.ofs_in_node != last_ofs_in_node + 1) { | |
1022 | err = -ENOSPC; | |
1023 | goto sync_out; | |
1024 | } | |
1025 | dn.ofs_in_node = end_offset; | |
bfad7c2d | 1026 | } |
eb47b800 | 1027 | |
c1286ff4 JK |
1028 | if (pgofs >= end) |
1029 | goto sync_out; | |
1030 | else if (dn.ofs_in_node < end_offset) | |
1031 | goto next_block; | |
973163fc | 1032 | |
c1286ff4 | 1033 | f2fs_put_dnode(&dn); |
973163fc | 1034 | |
c1286ff4 | 1035 | if (create) { |
13f00235 | 1036 | __do_map_lock(sbi, flag, false); |
332f40b4 | 1037 | f2fs_balance_fs(sbi, dn.node_changed); |
eb47b800 | 1038 | } |
c1286ff4 JK |
1039 | goto next_dnode; |
1040 | ||
bfad7c2d | 1041 | sync_out: |
eb47b800 | 1042 | f2fs_put_dnode(&dn); |
bfad7c2d | 1043 | unlock_out: |
c1286ff4 | 1044 | if (create) { |
13f00235 | 1045 | __do_map_lock(sbi, flag, false); |
332f40b4 | 1046 | f2fs_balance_fs(sbi, dn.node_changed); |
c1286ff4 | 1047 | } |
bfad7c2d | 1048 | out: |
003a3e1d | 1049 | trace_f2fs_map_blocks(inode, map, err); |
bfad7c2d | 1050 | return err; |
eb47b800 JK |
1051 | } |
1052 | ||
003a3e1d | 1053 | static int __get_data_block(struct inode *inode, sector_t iblock, |
c1286ff4 JK |
1054 | struct buffer_head *bh, int create, int flag, |
1055 | pgoff_t *next_pgofs) | |
003a3e1d JK |
1056 | { |
1057 | struct f2fs_map_blocks map; | |
bd8e4154 | 1058 | int err; |
003a3e1d JK |
1059 | |
1060 | map.m_lblk = iblock; | |
1061 | map.m_len = bh->b_size >> inode->i_blkbits; | |
c1286ff4 | 1062 | map.m_next_pgofs = next_pgofs; |
003a3e1d | 1063 | |
bd8e4154 JK |
1064 | err = f2fs_map_blocks(inode, &map, create, flag); |
1065 | if (!err) { | |
003a3e1d JK |
1066 | map_bh(bh, inode->i_sb, map.m_pblk); |
1067 | bh->b_state = (bh->b_state & ~F2FS_MAP_FLAGS) | map.m_flags; | |
13f00235 | 1068 | bh->b_size = (u64)map.m_len << inode->i_blkbits; |
003a3e1d | 1069 | } |
bd8e4154 | 1070 | return err; |
003a3e1d JK |
1071 | } |
1072 | ||
ccfb3000 | 1073 | static int get_data_block(struct inode *inode, sector_t iblock, |
c1286ff4 JK |
1074 | struct buffer_head *bh_result, int create, int flag, |
1075 | pgoff_t *next_pgofs) | |
e2b4e2bc | 1076 | { |
c1286ff4 JK |
1077 | return __get_data_block(inode, iblock, bh_result, create, |
1078 | flag, next_pgofs); | |
e2b4e2bc CY |
1079 | } |
1080 | ||
1081 | static int get_data_block_dio(struct inode *inode, sector_t iblock, | |
ccfb3000 JK |
1082 | struct buffer_head *bh_result, int create) |
1083 | { | |
e2b4e2bc | 1084 | return __get_data_block(inode, iblock, bh_result, create, |
13f00235 | 1085 | F2FS_GET_BLOCK_DEFAULT, NULL); |
ccfb3000 JK |
1086 | } |
1087 | ||
e2b4e2bc | 1088 | static int get_data_block_bmap(struct inode *inode, sector_t iblock, |
ccfb3000 JK |
1089 | struct buffer_head *bh_result, int create) |
1090 | { | |
c1286ff4 JK |
1091 | /* Block number less than F2FS MAX BLOCKS */ |
1092 | if (unlikely(iblock >= F2FS_I_SB(inode)->max_file_blocks)) | |
1093 | return -EFBIG; | |
1094 | ||
e2b4e2bc | 1095 | return __get_data_block(inode, iblock, bh_result, create, |
c1286ff4 | 1096 | F2FS_GET_BLOCK_BMAP, NULL); |
ccfb3000 JK |
1097 | } |
1098 | ||
7f63eb77 JK |
1099 | static inline sector_t logical_to_blk(struct inode *inode, loff_t offset) |
1100 | { | |
1101 | return (offset >> inode->i_blkbits); | |
1102 | } | |
1103 | ||
1104 | static inline loff_t blk_to_logical(struct inode *inode, sector_t blk) | |
1105 | { | |
1106 | return (blk << inode->i_blkbits); | |
1107 | } | |
1108 | ||
9ab70134 JK |
1109 | int f2fs_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
1110 | u64 start, u64 len) | |
1111 | { | |
7f63eb77 JK |
1112 | struct buffer_head map_bh; |
1113 | sector_t start_blk, last_blk; | |
c1286ff4 | 1114 | pgoff_t next_pgofs; |
7f63eb77 JK |
1115 | u64 logical = 0, phys = 0, size = 0; |
1116 | u32 flags = 0; | |
7f63eb77 JK |
1117 | int ret = 0; |
1118 | ||
1119 | ret = fiemap_check_flags(fieinfo, FIEMAP_FLAG_SYNC); | |
1120 | if (ret) | |
1121 | return ret; | |
1122 | ||
67f8cf3c JK |
1123 | if (f2fs_has_inline_data(inode)) { |
1124 | ret = f2fs_inline_data_fiemap(inode, fieinfo, start, len); | |
1125 | if (ret != -EAGAIN) | |
1126 | return ret; | |
1127 | } | |
1128 | ||
c1286ff4 | 1129 | inode_lock(inode); |
7f63eb77 | 1130 | |
7f63eb77 JK |
1131 | if (logical_to_blk(inode, len) == 0) |
1132 | len = blk_to_logical(inode, 1); | |
1133 | ||
1134 | start_blk = logical_to_blk(inode, start); | |
1135 | last_blk = logical_to_blk(inode, start + len - 1); | |
c1286ff4 | 1136 | |
7f63eb77 JK |
1137 | next: |
1138 | memset(&map_bh, 0, sizeof(struct buffer_head)); | |
1139 | map_bh.b_size = len; | |
1140 | ||
e2b4e2bc | 1141 | ret = get_data_block(inode, start_blk, &map_bh, 0, |
c1286ff4 | 1142 | F2FS_GET_BLOCK_FIEMAP, &next_pgofs); |
7f63eb77 JK |
1143 | if (ret) |
1144 | goto out; | |
1145 | ||
1146 | /* HOLE */ | |
1147 | if (!buffer_mapped(&map_bh)) { | |
c1286ff4 | 1148 | start_blk = next_pgofs; |
9e3d0bf6 CY |
1149 | |
1150 | if (blk_to_logical(inode, start_blk) < blk_to_logical(inode, | |
1151 | F2FS_I_SB(inode)->max_file_blocks)) | |
c1286ff4 | 1152 | goto prep_next; |
9e3d0bf6 | 1153 | |
c1286ff4 JK |
1154 | flags |= FIEMAP_EXTENT_LAST; |
1155 | } | |
7f63eb77 | 1156 | |
c1286ff4 JK |
1157 | if (size) { |
1158 | if (f2fs_encrypted_inode(inode)) | |
1159 | flags |= FIEMAP_EXTENT_DATA_ENCRYPTED; | |
7f63eb77 | 1160 | |
c1286ff4 JK |
1161 | ret = fiemap_fill_next_extent(fieinfo, logical, |
1162 | phys, size, flags); | |
1163 | } | |
7f63eb77 | 1164 | |
c1286ff4 JK |
1165 | if (start_blk > last_blk || ret) |
1166 | goto out; | |
7f63eb77 | 1167 | |
c1286ff4 JK |
1168 | logical = blk_to_logical(inode, start_blk); |
1169 | phys = blk_to_logical(inode, map_bh.b_blocknr); | |
1170 | size = map_bh.b_size; | |
1171 | flags = 0; | |
1172 | if (buffer_unwritten(&map_bh)) | |
1173 | flags = FIEMAP_EXTENT_UNWRITTEN; | |
7f63eb77 | 1174 | |
c1286ff4 JK |
1175 | start_blk += logical_to_blk(inode, size); |
1176 | ||
1177 | prep_next: | |
7f63eb77 JK |
1178 | cond_resched(); |
1179 | if (fatal_signal_pending(current)) | |
1180 | ret = -EINTR; | |
1181 | else | |
1182 | goto next; | |
1183 | out: | |
1184 | if (ret == 1) | |
1185 | ret = 0; | |
1186 | ||
c1286ff4 | 1187 | inode_unlock(inode); |
7f63eb77 | 1188 | return ret; |
9ab70134 JK |
1189 | } |
1190 | ||
f1e88660 JK |
1191 | /* |
1192 | * This function was originally taken from fs/mpage.c, and customized for f2fs. | |
1193 | * Major change was from block_size == page_size in f2fs by default. | |
1194 | */ | |
1195 | static int f2fs_mpage_readpages(struct address_space *mapping, | |
1196 | struct list_head *pages, struct page *page, | |
1197 | unsigned nr_pages) | |
1198 | { | |
1199 | struct bio *bio = NULL; | |
1200 | unsigned page_idx; | |
1201 | sector_t last_block_in_bio = 0; | |
1202 | struct inode *inode = mapping->host; | |
1203 | const unsigned blkbits = inode->i_blkbits; | |
1204 | const unsigned blocksize = 1 << blkbits; | |
1205 | sector_t block_in_file; | |
1206 | sector_t last_block; | |
1207 | sector_t last_block_in_file; | |
1208 | sector_t block_nr; | |
f1e88660 JK |
1209 | struct f2fs_map_blocks map; |
1210 | ||
1211 | map.m_pblk = 0; | |
1212 | map.m_lblk = 0; | |
1213 | map.m_len = 0; | |
1214 | map.m_flags = 0; | |
c1286ff4 | 1215 | map.m_next_pgofs = NULL; |
f1e88660 JK |
1216 | |
1217 | for (page_idx = 0; nr_pages; page_idx++, nr_pages--) { | |
1218 | ||
f1e88660 | 1219 | if (pages) { |
7129702a | 1220 | page = list_last_entry(pages, struct page, lru); |
13f00235 JK |
1221 | |
1222 | prefetchw(&page->flags); | |
f1e88660 JK |
1223 | list_del(&page->lru); |
1224 | if (add_to_page_cache_lru(page, mapping, | |
1225 | page->index, GFP_KERNEL)) | |
1226 | goto next_page; | |
1227 | } | |
1228 | ||
1229 | block_in_file = (sector_t)page->index; | |
1230 | last_block = block_in_file + nr_pages; | |
1231 | last_block_in_file = (i_size_read(inode) + blocksize - 1) >> | |
1232 | blkbits; | |
1233 | if (last_block > last_block_in_file) | |
1234 | last_block = last_block_in_file; | |
1235 | ||
1236 | /* | |
1237 | * Map blocks using the previous result first. | |
1238 | */ | |
1239 | if ((map.m_flags & F2FS_MAP_MAPPED) && | |
1240 | block_in_file > map.m_lblk && | |
1241 | block_in_file < (map.m_lblk + map.m_len)) | |
1242 | goto got_it; | |
1243 | ||
1244 | /* | |
1245 | * Then do more f2fs_map_blocks() calls until we are | |
1246 | * done with this page. | |
1247 | */ | |
1248 | map.m_flags = 0; | |
1249 | ||
1250 | if (block_in_file < last_block) { | |
1251 | map.m_lblk = block_in_file; | |
1252 | map.m_len = last_block - block_in_file; | |
1253 | ||
46c9e141 | 1254 | if (f2fs_map_blocks(inode, &map, 0, |
13f00235 | 1255 | F2FS_GET_BLOCK_DEFAULT)) |
f1e88660 JK |
1256 | goto set_error_page; |
1257 | } | |
1258 | got_it: | |
1259 | if ((map.m_flags & F2FS_MAP_MAPPED)) { | |
1260 | block_nr = map.m_pblk + block_in_file - map.m_lblk; | |
1261 | SetPageMappedToDisk(page); | |
1262 | ||
1263 | if (!PageUptodate(page) && !cleancache_get_page(page)) { | |
1264 | SetPageUptodate(page); | |
1265 | goto confused; | |
1266 | } | |
1267 | } else { | |
c1286ff4 JK |
1268 | zero_user_segment(page, 0, PAGE_SIZE); |
1269 | if (!PageUptodate(page)) | |
1270 | SetPageUptodate(page); | |
f1e88660 JK |
1271 | unlock_page(page); |
1272 | goto next_page; | |
1273 | } | |
1274 | ||
1275 | /* | |
1276 | * This page will go to BIO. Do we need to send this | |
1277 | * BIO off first? | |
1278 | */ | |
07f01079 JK |
1279 | if (bio && (last_block_in_bio != block_nr - 1 || |
1280 | !__same_bdev(F2FS_I_SB(inode), block_nr, bio))) { | |
f1e88660 | 1281 | submit_and_realloc: |
dc45fd9e | 1282 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1283 | bio = NULL; |
1284 | } | |
1285 | if (bio == NULL) { | |
13f00235 | 1286 | bio = f2fs_grab_read_bio(inode, block_nr, nr_pages); |
c1286ff4 JK |
1287 | if (IS_ERR(bio)) { |
1288 | bio = NULL; | |
f1e88660 | 1289 | goto set_error_page; |
4375a336 | 1290 | } |
f1e88660 JK |
1291 | } |
1292 | ||
1293 | if (bio_add_page(bio, page, blocksize, 0) < blocksize) | |
1294 | goto submit_and_realloc; | |
1295 | ||
1296 | last_block_in_bio = block_nr; | |
1297 | goto next_page; | |
1298 | set_error_page: | |
1299 | SetPageError(page); | |
c1286ff4 | 1300 | zero_user_segment(page, 0, PAGE_SIZE); |
f1e88660 JK |
1301 | unlock_page(page); |
1302 | goto next_page; | |
1303 | confused: | |
1304 | if (bio) { | |
dc45fd9e | 1305 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1306 | bio = NULL; |
1307 | } | |
1308 | unlock_page(page); | |
1309 | next_page: | |
1310 | if (pages) | |
c1286ff4 | 1311 | put_page(page); |
f1e88660 JK |
1312 | } |
1313 | BUG_ON(pages && !list_empty(pages)); | |
1314 | if (bio) | |
dc45fd9e | 1315 | __submit_bio(F2FS_I_SB(inode), bio, DATA); |
f1e88660 JK |
1316 | return 0; |
1317 | } | |
1318 | ||
eb47b800 JK |
1319 | static int f2fs_read_data_page(struct file *file, struct page *page) |
1320 | { | |
9ffe0fb5 | 1321 | struct inode *inode = page->mapping->host; |
b3d208f9 | 1322 | int ret = -EAGAIN; |
9ffe0fb5 | 1323 | |
c20e89cd CY |
1324 | trace_f2fs_readpage(page, DATA); |
1325 | ||
e1c42045 | 1326 | /* If the file has inline data, try to read it directly */ |
9ffe0fb5 HL |
1327 | if (f2fs_has_inline_data(inode)) |
1328 | ret = f2fs_read_inline_data(inode, page); | |
b3d208f9 | 1329 | if (ret == -EAGAIN) |
f1e88660 | 1330 | ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1); |
9ffe0fb5 | 1331 | return ret; |
eb47b800 JK |
1332 | } |
1333 | ||
1334 | static int f2fs_read_data_pages(struct file *file, | |
1335 | struct address_space *mapping, | |
1336 | struct list_head *pages, unsigned nr_pages) | |
1337 | { | |
353c1624 | 1338 | struct inode *inode = mapping->host; |
7129702a | 1339 | struct page *page = list_last_entry(pages, struct page, lru); |
b8c29400 CY |
1340 | |
1341 | trace_f2fs_readpages(inode, page, nr_pages); | |
9ffe0fb5 HL |
1342 | |
1343 | /* If the file has inline data, skip readpages */ | |
1344 | if (f2fs_has_inline_data(inode)) | |
1345 | return 0; | |
1346 | ||
f1e88660 | 1347 | return f2fs_mpage_readpages(mapping, pages, NULL, nr_pages); |
eb47b800 JK |
1348 | } |
1349 | ||
13f00235 JK |
1350 | static int encrypt_one_page(struct f2fs_io_info *fio) |
1351 | { | |
1352 | struct inode *inode = fio->page->mapping->host; | |
1353 | gfp_t gfp_flags = GFP_NOFS; | |
1354 | ||
1355 | if (!f2fs_encrypted_file(inode)) | |
1356 | return 0; | |
1357 | ||
1358 | /* wait for GCed encrypted page writeback */ | |
1359 | f2fs_wait_on_block_writeback(fio->sbi, fio->old_blkaddr); | |
1360 | ||
1361 | retry_encrypt: | |
1362 | fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page, | |
1363 | PAGE_SIZE, 0, fio->page->index, gfp_flags); | |
1364 | if (!IS_ERR(fio->encrypted_page)) | |
1365 | return 0; | |
1366 | ||
1367 | /* flush pending IOs and wait for a while in the ENOMEM case */ | |
1368 | if (PTR_ERR(fio->encrypted_page) == -ENOMEM) { | |
1369 | f2fs_flush_merged_writes(fio->sbi); | |
1370 | congestion_wait(BLK_RW_ASYNC, HZ/50); | |
1371 | gfp_flags |= __GFP_NOFAIL; | |
1372 | goto retry_encrypt; | |
1373 | } | |
1374 | return PTR_ERR(fio->encrypted_page); | |
1375 | } | |
1376 | ||
1377 | static inline bool need_inplace_update(struct f2fs_io_info *fio) | |
1378 | { | |
1379 | struct inode *inode = fio->page->mapping->host; | |
1380 | ||
1381 | if (S_ISDIR(inode->i_mode) || f2fs_is_atomic_file(inode)) | |
1382 | return false; | |
1383 | if (is_cold_data(fio->page)) | |
1384 | return false; | |
1385 | if (IS_ATOMIC_WRITTEN_PAGE(fio->page)) | |
1386 | return false; | |
1387 | ||
1388 | return need_inplace_update_policy(inode, fio); | |
1389 | } | |
1390 | ||
1391 | static inline bool valid_ipu_blkaddr(struct f2fs_io_info *fio) | |
1392 | { | |
1393 | if (fio->old_blkaddr == NEW_ADDR) | |
1394 | return false; | |
1395 | if (fio->old_blkaddr == NULL_ADDR) | |
1396 | return false; | |
1397 | return true; | |
1398 | } | |
1399 | ||
05ca3632 | 1400 | int do_write_data_page(struct f2fs_io_info *fio) |
eb47b800 | 1401 | { |
05ca3632 | 1402 | struct page *page = fio->page; |
eb47b800 | 1403 | struct inode *inode = page->mapping->host; |
eb47b800 | 1404 | struct dnode_of_data dn; |
13f00235 JK |
1405 | struct extent_info ei = {0,0,0}; |
1406 | bool ipu_force = false; | |
eb47b800 JK |
1407 | int err = 0; |
1408 | ||
1409 | set_new_dnode(&dn, inode, NULL, NULL, 0); | |
13f00235 JK |
1410 | if (need_inplace_update(fio) && |
1411 | f2fs_lookup_extent_cache(inode, page->index, &ei)) { | |
1412 | fio->old_blkaddr = ei.blk + page->index - ei.fofs; | |
1413 | ||
1414 | if (valid_ipu_blkaddr(fio)) { | |
1415 | ipu_force = true; | |
1416 | fio->need_lock = LOCK_DONE; | |
1417 | goto got_it; | |
1418 | } | |
1419 | } | |
1420 | ||
1421 | /* Deadlock due to between page->lock and f2fs_lock_op */ | |
1422 | if (fio->need_lock == LOCK_REQ && !f2fs_trylock_op(fio->sbi)) | |
1423 | return -EAGAIN; | |
1424 | ||
266e97a8 | 1425 | err = get_dnode_of_data(&dn, page->index, LOOKUP_NODE); |
eb47b800 | 1426 | if (err) |
13f00235 | 1427 | goto out; |
eb47b800 | 1428 | |
c1286ff4 | 1429 | fio->old_blkaddr = dn.data_blkaddr; |
eb47b800 JK |
1430 | |
1431 | /* This page is already truncated */ | |
c1286ff4 | 1432 | if (fio->old_blkaddr == NULL_ADDR) { |
2bca1e23 | 1433 | ClearPageUptodate(page); |
eb47b800 | 1434 | goto out_writepage; |
2bca1e23 | 1435 | } |
13f00235 JK |
1436 | got_it: |
1437 | /* | |
1438 | * If current allocation needs SSR, | |
1439 | * it had better in-place writes for updated data. | |
1440 | */ | |
1441 | if (ipu_force || (valid_ipu_blkaddr(fio) && need_inplace_update(fio))) { | |
1442 | err = encrypt_one_page(fio); | |
1443 | if (err) | |
1444 | goto out_writepage; | |
eb47b800 | 1445 | |
13f00235 JK |
1446 | set_page_writeback(page); |
1447 | f2fs_put_dnode(&dn); | |
1448 | if (fio->need_lock == LOCK_REQ) | |
1449 | f2fs_unlock_op(fio->sbi); | |
1450 | err = rewrite_data_page(fio); | |
1451 | trace_f2fs_do_write_data_page(fio->page, IPU); | |
1452 | set_inode_flag(inode, FI_UPDATE_WRITE); | |
1453 | return err; | |
1454 | } | |
08b39fbd | 1455 | |
13f00235 JK |
1456 | if (fio->need_lock == LOCK_RETRY) { |
1457 | if (!f2fs_trylock_op(fio->sbi)) { | |
1458 | err = -EAGAIN; | |
4375a336 JK |
1459 | goto out_writepage; |
1460 | } | |
13f00235 | 1461 | fio->need_lock = LOCK_REQ; |
4375a336 JK |
1462 | } |
1463 | ||
13f00235 JK |
1464 | err = encrypt_one_page(fio); |
1465 | if (err) | |
1466 | goto out_writepage; | |
1467 | ||
eb47b800 JK |
1468 | set_page_writeback(page); |
1469 | ||
13f00235 JK |
1470 | /* LFS mode write path */ |
1471 | write_data_page(&dn, fio); | |
1472 | trace_f2fs_do_write_data_page(page, OPU); | |
1473 | set_inode_flag(inode, FI_APPEND_WRITE); | |
1474 | if (page->index == 0) | |
1475 | set_inode_flag(inode, FI_FIRST_BLOCK_WRITTEN); | |
eb47b800 JK |
1476 | out_writepage: |
1477 | f2fs_put_dnode(&dn); | |
13f00235 JK |
1478 | out: |
1479 | if (fio->need_lock == LOCK_REQ) | |
1480 | f2fs_unlock_op(fio->sbi); | |
eb47b800 JK |
1481 | return err; |
1482 | } | |
1483 | ||
13f00235 JK |
1484 | static int __write_data_page(struct page *page, bool *submitted, |
1485 | struct writeback_control *wbc, | |
1486 | enum iostat_type io_type) | |
eb47b800 JK |
1487 | { |
1488 | struct inode *inode = page->mapping->host; | |
4081363f | 1489 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
eb47b800 JK |
1490 | loff_t i_size = i_size_read(inode); |
1491 | const pgoff_t end_index = ((unsigned long long) i_size) | |
c1286ff4 JK |
1492 | >> PAGE_SHIFT; |
1493 | loff_t psize = (page->index + 1) << PAGE_SHIFT; | |
9ffe0fb5 | 1494 | unsigned offset = 0; |
39936837 | 1495 | bool need_balance_fs = false; |
eb47b800 | 1496 | int err = 0; |
458e6197 | 1497 | struct f2fs_io_info fio = { |
05ca3632 | 1498 | .sbi = sbi, |
353c1624 | 1499 | .ino = inode->i_ino, |
458e6197 | 1500 | .type = DATA, |
dc45fd9e JK |
1501 | .op = REQ_OP_WRITE, |
1502 | .op_flags = wbc_to_write_flags(wbc), | |
13f00235 | 1503 | .old_blkaddr = NULL_ADDR, |
05ca3632 | 1504 | .page = page, |
4375a336 | 1505 | .encrypted_page = NULL, |
13f00235 JK |
1506 | .submitted = false, |
1507 | .need_lock = LOCK_RETRY, | |
1508 | .io_type = io_type, | |
458e6197 | 1509 | }; |
eb47b800 | 1510 | |
ecda0de3 CY |
1511 | trace_f2fs_writepage(page, DATA); |
1512 | ||
13f00235 JK |
1513 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) |
1514 | goto redirty_out; | |
1515 | ||
eb47b800 | 1516 | if (page->index < end_index) |
39936837 | 1517 | goto write; |
eb47b800 JK |
1518 | |
1519 | /* | |
1520 | * If the offset is out-of-range of file size, | |
1521 | * this page does not have to be written to disk. | |
1522 | */ | |
c1286ff4 | 1523 | offset = i_size & (PAGE_SIZE - 1); |
76f60268 | 1524 | if ((page->index >= end_index + 1) || !offset) |
39936837 | 1525 | goto out; |
eb47b800 | 1526 | |
c1286ff4 | 1527 | zero_user_segment(page, offset, PAGE_SIZE); |
39936837 | 1528 | write: |
1e84371f JK |
1529 | if (f2fs_is_drop_cache(inode)) |
1530 | goto out; | |
c1286ff4 JK |
1531 | /* we should not write 0'th page having journal header */ |
1532 | if (f2fs_is_volatile_file(inode) && (!page->index || | |
1533 | (!wbc->for_reclaim && | |
1534 | available_free_memory(sbi, BASE_CHECK)))) | |
1e84371f | 1535 | goto redirty_out; |
eb47b800 | 1536 | |
c1286ff4 JK |
1537 | /* we should bypass data pages to proceed the kworkder jobs */ |
1538 | if (unlikely(f2fs_cp_error(sbi))) { | |
1539 | mapping_set_error(page->mapping, -EIO); | |
1540 | goto out; | |
1541 | } | |
1542 | ||
39936837 | 1543 | /* Dentry blocks are controlled by checkpoint */ |
eb47b800 | 1544 | if (S_ISDIR(inode->i_mode)) { |
13f00235 | 1545 | fio.need_lock = LOCK_DONE; |
05ca3632 | 1546 | err = do_write_data_page(&fio); |
8618b881 JK |
1547 | goto done; |
1548 | } | |
9ffe0fb5 | 1549 | |
8618b881 | 1550 | if (!wbc->for_reclaim) |
39936837 | 1551 | need_balance_fs = true; |
c1286ff4 | 1552 | else if (has_not_enough_free_secs(sbi, 0, 0)) |
39936837 | 1553 | goto redirty_out; |
13f00235 JK |
1554 | else |
1555 | set_inode_flag(inode, FI_HOT_DATA); | |
eb47b800 | 1556 | |
b3d208f9 | 1557 | err = -EAGAIN; |
13f00235 | 1558 | if (f2fs_has_inline_data(inode)) { |
b3d208f9 | 1559 | err = f2fs_write_inline_data(inode, page); |
13f00235 JK |
1560 | if (!err) |
1561 | goto out; | |
1562 | } | |
1563 | ||
1564 | if (err == -EAGAIN) { | |
05ca3632 | 1565 | err = do_write_data_page(&fio); |
13f00235 JK |
1566 | if (err == -EAGAIN) { |
1567 | fio.need_lock = LOCK_REQ; | |
1568 | err = do_write_data_page(&fio); | |
1569 | } | |
1570 | } | |
353c1624 JK |
1571 | |
1572 | down_write(&F2FS_I(inode)->i_sem); | |
c1286ff4 JK |
1573 | if (F2FS_I(inode)->last_disk_size < psize) |
1574 | F2FS_I(inode)->last_disk_size = psize; | |
353c1624 | 1575 | up_write(&F2FS_I(inode)->i_sem); |
13f00235 | 1576 | |
8618b881 JK |
1577 | done: |
1578 | if (err && err != -ENOENT) | |
1579 | goto redirty_out; | |
eb47b800 | 1580 | |
39936837 | 1581 | out: |
a7ffdbe2 | 1582 | inode_dec_dirty_pages(inode); |
2bca1e23 JK |
1583 | if (err) |
1584 | ClearPageUptodate(page); | |
c1286ff4 JK |
1585 | |
1586 | if (wbc->for_reclaim) { | |
13f00235 JK |
1587 | f2fs_submit_merged_write_cond(sbi, inode, 0, page->index, DATA); |
1588 | clear_inode_flag(inode, FI_HOT_DATA); | |
c1286ff4 | 1589 | remove_dirty_inode(inode); |
13f00235 | 1590 | submitted = NULL; |
c1286ff4 JK |
1591 | } |
1592 | ||
eb47b800 | 1593 | unlock_page(page); |
13f00235 JK |
1594 | if (!S_ISDIR(inode->i_mode)) |
1595 | f2fs_balance_fs(sbi, need_balance_fs); | |
1596 | ||
1597 | if (unlikely(f2fs_cp_error(sbi))) { | |
1598 | f2fs_submit_merged_write(sbi, DATA); | |
1599 | submitted = NULL; | |
1600 | } | |
c1286ff4 | 1601 | |
13f00235 JK |
1602 | if (submitted) |
1603 | *submitted = fio.submitted; | |
c1286ff4 | 1604 | |
eb47b800 JK |
1605 | return 0; |
1606 | ||
eb47b800 | 1607 | redirty_out: |
76f60268 | 1608 | redirty_page_for_writepage(wbc, page); |
9a82dd23 CY |
1609 | if (!err) |
1610 | return AOP_WRITEPAGE_ACTIVATE; | |
c1286ff4 JK |
1611 | unlock_page(page); |
1612 | return err; | |
fa9150a8 NJ |
1613 | } |
1614 | ||
13f00235 JK |
1615 | static int f2fs_write_data_page(struct page *page, |
1616 | struct writeback_control *wbc) | |
1617 | { | |
1618 | return __write_data_page(page, NULL, wbc, FS_DATA_IO); | |
1619 | } | |
1620 | ||
8f46dcae CY |
1621 | /* |
1622 | * This function was copied from write_cche_pages from mm/page-writeback.c. | |
1623 | * The major change is making write step of cold data page separately from | |
1624 | * warm/hot data page. | |
1625 | */ | |
1626 | static int f2fs_write_cache_pages(struct address_space *mapping, | |
13f00235 JK |
1627 | struct writeback_control *wbc, |
1628 | enum iostat_type io_type) | |
8f46dcae CY |
1629 | { |
1630 | int ret = 0; | |
1631 | int done = 0; | |
1632 | struct pagevec pvec; | |
1633 | int nr_pages; | |
1634 | pgoff_t uninitialized_var(writeback_index); | |
1635 | pgoff_t index; | |
1636 | pgoff_t end; /* Inclusive */ | |
1637 | pgoff_t done_index; | |
13f00235 | 1638 | pgoff_t last_idx = ULONG_MAX; |
8f46dcae CY |
1639 | int cycled; |
1640 | int range_whole = 0; | |
1641 | int tag; | |
8f46dcae CY |
1642 | |
1643 | pagevec_init(&pvec, 0); | |
c1286ff4 | 1644 | |
13f00235 JK |
1645 | if (get_dirty_pages(mapping->host) <= |
1646 | SM_I(F2FS_M_SB(mapping))->min_hot_blocks) | |
1647 | set_inode_flag(mapping->host, FI_HOT_DATA); | |
1648 | else | |
1649 | clear_inode_flag(mapping->host, FI_HOT_DATA); | |
1650 | ||
8f46dcae CY |
1651 | if (wbc->range_cyclic) { |
1652 | writeback_index = mapping->writeback_index; /* prev offset */ | |
1653 | index = writeback_index; | |
1654 | if (index == 0) | |
1655 | cycled = 1; | |
1656 | else | |
1657 | cycled = 0; | |
1658 | end = -1; | |
1659 | } else { | |
c1286ff4 JK |
1660 | index = wbc->range_start >> PAGE_SHIFT; |
1661 | end = wbc->range_end >> PAGE_SHIFT; | |
8f46dcae CY |
1662 | if (wbc->range_start == 0 && wbc->range_end == LLONG_MAX) |
1663 | range_whole = 1; | |
1664 | cycled = 1; /* ignore range_cyclic tests */ | |
1665 | } | |
1666 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1667 | tag = PAGECACHE_TAG_TOWRITE; | |
1668 | else | |
1669 | tag = PAGECACHE_TAG_DIRTY; | |
1670 | retry: | |
1671 | if (wbc->sync_mode == WB_SYNC_ALL || wbc->tagged_writepages) | |
1672 | tag_pages_for_writeback(mapping, index, end); | |
1673 | done_index = index; | |
1674 | while (!done && (index <= end)) { | |
1675 | int i; | |
1676 | ||
1677 | nr_pages = pagevec_lookup_tag(&pvec, mapping, &index, tag, | |
1678 | min(end - index, (pgoff_t)PAGEVEC_SIZE - 1) + 1); | |
1679 | if (nr_pages == 0) | |
1680 | break; | |
1681 | ||
1682 | for (i = 0; i < nr_pages; i++) { | |
1683 | struct page *page = pvec.pages[i]; | |
13f00235 | 1684 | bool submitted = false; |
8f46dcae CY |
1685 | |
1686 | if (page->index > end) { | |
1687 | done = 1; | |
1688 | break; | |
1689 | } | |
1690 | ||
1691 | done_index = page->index; | |
13f00235 | 1692 | retry_write: |
8f46dcae CY |
1693 | lock_page(page); |
1694 | ||
1695 | if (unlikely(page->mapping != mapping)) { | |
1696 | continue_unlock: | |
1697 | unlock_page(page); | |
1698 | continue; | |
1699 | } | |
1700 | ||
1701 | if (!PageDirty(page)) { | |
1702 | /* someone wrote it for us */ | |
1703 | goto continue_unlock; | |
1704 | } | |
1705 | ||
8f46dcae CY |
1706 | if (PageWriteback(page)) { |
1707 | if (wbc->sync_mode != WB_SYNC_NONE) | |
c1286ff4 JK |
1708 | f2fs_wait_on_page_writeback(page, |
1709 | DATA, true); | |
8f46dcae CY |
1710 | else |
1711 | goto continue_unlock; | |
1712 | } | |
1713 | ||
1714 | BUG_ON(PageWriteback(page)); | |
1715 | if (!clear_page_dirty_for_io(page)) | |
1716 | goto continue_unlock; | |
1717 | ||
13f00235 | 1718 | ret = __write_data_page(page, &submitted, wbc, io_type); |
8f46dcae | 1719 | if (unlikely(ret)) { |
9a82dd23 CY |
1720 | /* |
1721 | * keep nr_to_write, since vfs uses this to | |
1722 | * get # of written pages. | |
1723 | */ | |
1724 | if (ret == AOP_WRITEPAGE_ACTIVATE) { | |
1725 | unlock_page(page); | |
1726 | ret = 0; | |
1727 | continue; | |
13f00235 JK |
1728 | } else if (ret == -EAGAIN) { |
1729 | ret = 0; | |
1730 | if (wbc->sync_mode == WB_SYNC_ALL) { | |
1731 | cond_resched(); | |
1732 | congestion_wait(BLK_RW_ASYNC, | |
1733 | HZ/50); | |
1734 | goto retry_write; | |
1735 | } | |
1736 | continue; | |
9a82dd23 | 1737 | } |
c1286ff4 JK |
1738 | done_index = page->index + 1; |
1739 | done = 1; | |
1740 | break; | |
13f00235 JK |
1741 | } else if (submitted) { |
1742 | last_idx = page->index; | |
8f46dcae CY |
1743 | } |
1744 | ||
13f00235 JK |
1745 | /* give a priority to WB_SYNC threads */ |
1746 | if ((atomic_read(&F2FS_M_SB(mapping)->wb_sync_req) || | |
1747 | --wbc->nr_to_write <= 0) && | |
1748 | wbc->sync_mode == WB_SYNC_NONE) { | |
8f46dcae CY |
1749 | done = 1; |
1750 | break; | |
1751 | } | |
1752 | } | |
1753 | pagevec_release(&pvec); | |
1754 | cond_resched(); | |
1755 | } | |
1756 | ||
8f46dcae CY |
1757 | if (!cycled && !done) { |
1758 | cycled = 1; | |
1759 | index = 0; | |
1760 | end = writeback_index - 1; | |
1761 | goto retry; | |
1762 | } | |
1763 | if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0)) | |
1764 | mapping->writeback_index = done_index; | |
1765 | ||
13f00235 JK |
1766 | if (last_idx != ULONG_MAX) |
1767 | f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host, | |
1768 | 0, last_idx, DATA); | |
c1286ff4 | 1769 | |
8f46dcae CY |
1770 | return ret; |
1771 | } | |
1772 | ||
13f00235 JK |
1773 | int __f2fs_write_data_pages(struct address_space *mapping, |
1774 | struct writeback_control *wbc, | |
1775 | enum iostat_type io_type) | |
eb47b800 JK |
1776 | { |
1777 | struct inode *inode = mapping->host; | |
4081363f | 1778 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
c1286ff4 | 1779 | struct blk_plug plug; |
eb47b800 | 1780 | int ret; |
e5748434 | 1781 | |
cfb185a1 | 1782 | /* deal with chardevs and other special file */ |
1783 | if (!mapping->a_ops->writepage) | |
1784 | return 0; | |
1785 | ||
6a290544 CY |
1786 | /* skip writing if there is no dirty page in this inode */ |
1787 | if (!get_dirty_pages(inode) && wbc->sync_mode == WB_SYNC_NONE) | |
1788 | return 0; | |
1789 | ||
13f00235 JK |
1790 | /* during POR, we don't need to trigger writepage at all. */ |
1791 | if (unlikely(is_sbi_flag_set(sbi, SBI_POR_DOING))) | |
1792 | goto skip_write; | |
1793 | ||
a1257023 JK |
1794 | if (S_ISDIR(inode->i_mode) && wbc->sync_mode == WB_SYNC_NONE && |
1795 | get_dirty_pages(inode) < nr_pages_to_skip(sbi, DATA) && | |
1796 | available_free_memory(sbi, DIRTY_DENTS)) | |
1797 | goto skip_write; | |
1798 | ||
c1286ff4 JK |
1799 | /* skip writing during file defragment */ |
1800 | if (is_inode_flag_set(inode, FI_DO_DEFRAG)) | |
1801 | goto skip_write; | |
1802 | ||
c1286ff4 | 1803 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
458e6197 | 1804 | |
13f00235 JK |
1805 | /* to avoid spliting IOs due to mixed WB_SYNC_ALL and WB_SYNC_NONE */ |
1806 | if (wbc->sync_mode == WB_SYNC_ALL) | |
1807 | atomic_inc(&sbi->wb_sync_req); | |
1808 | else if (atomic_read(&sbi->wb_sync_req)) | |
1809 | goto skip_write; | |
1810 | ||
c1286ff4 | 1811 | blk_start_plug(&plug); |
13f00235 | 1812 | ret = f2fs_write_cache_pages(mapping, wbc, io_type); |
c1286ff4 | 1813 | blk_finish_plug(&plug); |
13f00235 JK |
1814 | |
1815 | if (wbc->sync_mode == WB_SYNC_ALL) | |
1816 | atomic_dec(&sbi->wb_sync_req); | |
c1286ff4 JK |
1817 | /* |
1818 | * if some pages were truncated, we cannot guarantee its mapping->host | |
1819 | * to detect pending bios. | |
1820 | */ | |
eb47b800 | 1821 | |
c1286ff4 | 1822 | remove_dirty_inode(inode); |
eb47b800 | 1823 | return ret; |
d3baf95d JK |
1824 | |
1825 | skip_write: | |
a7ffdbe2 | 1826 | wbc->pages_skipped += get_dirty_pages(inode); |
c1286ff4 | 1827 | trace_f2fs_writepages(mapping->host, wbc, DATA); |
d3baf95d | 1828 | return 0; |
eb47b800 JK |
1829 | } |
1830 | ||
13f00235 JK |
1831 | static int f2fs_write_data_pages(struct address_space *mapping, |
1832 | struct writeback_control *wbc) | |
1833 | { | |
1834 | struct inode *inode = mapping->host; | |
1835 | ||
1836 | return __f2fs_write_data_pages(mapping, wbc, | |
1837 | F2FS_I(inode)->cp_task == current ? | |
1838 | FS_CP_DATA_IO : FS_DATA_IO); | |
1839 | } | |
1840 | ||
3aab8f82 CY |
1841 | static void f2fs_write_failed(struct address_space *mapping, loff_t to) |
1842 | { | |
1843 | struct inode *inode = mapping->host; | |
c1286ff4 JK |
1844 | loff_t i_size = i_size_read(inode); |
1845 | ||
1846 | if (to > i_size) { | |
13f00235 | 1847 | down_write(&F2FS_I(inode)->i_mmap_sem); |
c1286ff4 JK |
1848 | truncate_pagecache(inode, i_size); |
1849 | truncate_blocks(inode, i_size, true); | |
13f00235 | 1850 | up_write(&F2FS_I(inode)->i_mmap_sem); |
c1286ff4 JK |
1851 | } |
1852 | } | |
1853 | ||
1854 | static int prepare_write_begin(struct f2fs_sb_info *sbi, | |
1855 | struct page *page, loff_t pos, unsigned len, | |
1856 | block_t *blk_addr, bool *node_changed) | |
1857 | { | |
1858 | struct inode *inode = page->mapping->host; | |
1859 | pgoff_t index = page->index; | |
1860 | struct dnode_of_data dn; | |
1861 | struct page *ipage; | |
1862 | bool locked = false; | |
13f00235 | 1863 | struct extent_info ei = {0,0,0}; |
c1286ff4 JK |
1864 | int err = 0; |
1865 | ||
1866 | /* | |
1867 | * we already allocated all the blocks, so we don't need to get | |
1868 | * the block addresses when there is no need to fill the page. | |
1869 | */ | |
13f00235 JK |
1870 | if (!f2fs_has_inline_data(inode) && len == PAGE_SIZE && |
1871 | !is_inode_flag_set(inode, FI_NO_PREALLOC)) | |
c1286ff4 | 1872 | return 0; |
3aab8f82 | 1873 | |
c1286ff4 JK |
1874 | if (f2fs_has_inline_data(inode) || |
1875 | (pos & PAGE_MASK) >= i_size_read(inode)) { | |
13f00235 | 1876 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, true); |
c1286ff4 | 1877 | locked = true; |
3aab8f82 | 1878 | } |
c1286ff4 JK |
1879 | restart: |
1880 | /* check inline_data */ | |
1881 | ipage = get_node_page(sbi, inode->i_ino); | |
1882 | if (IS_ERR(ipage)) { | |
1883 | err = PTR_ERR(ipage); | |
1884 | goto unlock_out; | |
1885 | } | |
1886 | ||
1887 | set_new_dnode(&dn, inode, ipage, ipage, 0); | |
1888 | ||
1889 | if (f2fs_has_inline_data(inode)) { | |
13f00235 | 1890 | if (pos + len <= MAX_INLINE_DATA(inode)) { |
c1286ff4 JK |
1891 | read_inline_data(page, ipage); |
1892 | set_inode_flag(inode, FI_DATA_EXIST); | |
1893 | if (inode->i_nlink) | |
1894 | set_inline_node(ipage); | |
1895 | } else { | |
1896 | err = f2fs_convert_inline_page(&dn, page); | |
1897 | if (err) | |
1898 | goto out; | |
1899 | if (dn.data_blkaddr == NULL_ADDR) | |
1900 | err = f2fs_get_block(&dn, index); | |
1901 | } | |
1902 | } else if (locked) { | |
1903 | err = f2fs_get_block(&dn, index); | |
1904 | } else { | |
1905 | if (f2fs_lookup_extent_cache(inode, index, &ei)) { | |
1906 | dn.data_blkaddr = ei.blk + index - ei.fofs; | |
1907 | } else { | |
1908 | /* hole case */ | |
1909 | err = get_dnode_of_data(&dn, index, LOOKUP_NODE); | |
1910 | if (err || dn.data_blkaddr == NULL_ADDR) { | |
1911 | f2fs_put_dnode(&dn); | |
13f00235 JK |
1912 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, |
1913 | true); | |
c1286ff4 JK |
1914 | locked = true; |
1915 | goto restart; | |
1916 | } | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | /* convert_inline_page can make node_changed */ | |
1921 | *blk_addr = dn.data_blkaddr; | |
1922 | *node_changed = dn.node_changed; | |
1923 | out: | |
1924 | f2fs_put_dnode(&dn); | |
1925 | unlock_out: | |
1926 | if (locked) | |
13f00235 | 1927 | __do_map_lock(sbi, F2FS_GET_BLOCK_PRE_AIO, false); |
c1286ff4 | 1928 | return err; |
3aab8f82 CY |
1929 | } |
1930 | ||
eb47b800 JK |
1931 | static int f2fs_write_begin(struct file *file, struct address_space *mapping, |
1932 | loff_t pos, unsigned len, unsigned flags, | |
1933 | struct page **pagep, void **fsdata) | |
1934 | { | |
1935 | struct inode *inode = mapping->host; | |
4081363f | 1936 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
86531d6b | 1937 | struct page *page = NULL; |
c1286ff4 JK |
1938 | pgoff_t index = ((unsigned long long) pos) >> PAGE_SHIFT; |
1939 | bool need_balance = false; | |
1940 | block_t blkaddr = NULL_ADDR; | |
eb47b800 JK |
1941 | int err = 0; |
1942 | ||
d854b688 MS |
1943 | if (trace_android_fs_datawrite_start_enabled()) { |
1944 | char *path, pathbuf[MAX_TRACE_PATHBUF_LEN]; | |
1945 | ||
1946 | path = android_fstrace_get_pathname(pathbuf, | |
1947 | MAX_TRACE_PATHBUF_LEN, | |
1948 | inode); | |
1949 | trace_android_fs_datawrite_start(inode, pos, len, | |
1950 | current->pid, path, | |
1951 | current->comm); | |
1952 | } | |
62aed044 CY |
1953 | trace_f2fs_write_begin(inode, pos, len, flags); |
1954 | ||
353c1624 JK |
1955 | if (f2fs_is_atomic_file(inode) && |
1956 | !available_free_memory(sbi, INMEM_PAGES)) { | |
1957 | err = -ENOMEM; | |
1958 | goto fail; | |
1959 | } | |
1960 | ||
5f727395 JK |
1961 | /* |
1962 | * We should check this at this moment to avoid deadlock on inode page | |
1963 | * and #0 page. The locking rule for inline_data conversion should be: | |
1964 | * lock_page(page #0) -> lock_page(inode_page) | |
1965 | */ | |
1966 | if (index != 0) { | |
1967 | err = f2fs_convert_inline_inode(inode); | |
1968 | if (err) | |
1969 | goto fail; | |
1970 | } | |
afcb7ca0 | 1971 | repeat: |
13f00235 JK |
1972 | /* |
1973 | * Do not use grab_cache_page_write_begin() to avoid deadlock due to | |
1974 | * wait_for_stable_page. Will wait that below with our IO control. | |
1975 | */ | |
353c1624 JK |
1976 | page = f2fs_pagecache_get_page(mapping, index, |
1977 | FGP_LOCK | FGP_WRITE | FGP_CREAT, GFP_NOFS); | |
3aab8f82 CY |
1978 | if (!page) { |
1979 | err = -ENOMEM; | |
1980 | goto fail; | |
1981 | } | |
d5f66990 | 1982 | |
eb47b800 JK |
1983 | *pagep = page; |
1984 | ||
c1286ff4 JK |
1985 | err = prepare_write_begin(sbi, page, pos, len, |
1986 | &blkaddr, &need_balance); | |
1987 | if (err) | |
1988 | goto fail; | |
b3d208f9 | 1989 | |
c1286ff4 JK |
1990 | if (need_balance && has_not_enough_free_secs(sbi, 0, 0)) { |
1991 | unlock_page(page); | |
1992 | f2fs_balance_fs(sbi, true); | |
1993 | lock_page(page); | |
1994 | if (page->mapping != mapping) { | |
1995 | /* The page got truncated from under us */ | |
1996 | f2fs_put_page(page, 1); | |
1997 | goto repeat; | |
b3d208f9 | 1998 | } |
b600965c | 1999 | } |
759af1c9 | 2000 | |
c1286ff4 | 2001 | f2fs_wait_on_page_writeback(page, DATA, false); |
b3d208f9 | 2002 | |
08b39fbd | 2003 | /* wait for GCed encrypted page writeback */ |
13f00235 JK |
2004 | if (f2fs_encrypted_file(inode)) |
2005 | f2fs_wait_on_block_writeback(sbi, blkaddr); | |
08b39fbd | 2006 | |
c1286ff4 JK |
2007 | if (len == PAGE_SIZE || PageUptodate(page)) |
2008 | return 0; | |
eb47b800 | 2009 | |
ff919929 YH |
2010 | if (!(pos & (PAGE_SIZE - 1)) && (pos + len) >= i_size_read(inode)) { |
2011 | zero_user_segment(page, len, PAGE_SIZE); | |
2012 | return 0; | |
2013 | } | |
2014 | ||
c1286ff4 JK |
2015 | if (blkaddr == NEW_ADDR) { |
2016 | zero_user_segment(page, 0, PAGE_SIZE); | |
2017 | SetPageUptodate(page); | |
eb47b800 | 2018 | } else { |
13f00235 JK |
2019 | err = f2fs_submit_page_read(inode, page, blkaddr); |
2020 | if (err) | |
3aab8f82 | 2021 | goto fail; |
c1286ff4 JK |
2022 | |
2023 | lock_page(page); | |
6bacf52f | 2024 | if (unlikely(page->mapping != mapping)) { |
afcb7ca0 JK |
2025 | f2fs_put_page(page, 1); |
2026 | goto repeat; | |
eb47b800 | 2027 | } |
c1286ff4 JK |
2028 | if (unlikely(!PageUptodate(page))) { |
2029 | err = -EIO; | |
2030 | goto fail; | |
4375a336 | 2031 | } |
eb47b800 | 2032 | } |
eb47b800 | 2033 | return 0; |
9ba69cf9 | 2034 | |
3aab8f82 | 2035 | fail: |
86531d6b | 2036 | f2fs_put_page(page, 1); |
3aab8f82 | 2037 | f2fs_write_failed(mapping, pos + len); |
353c1624 JK |
2038 | if (f2fs_is_atomic_file(inode)) |
2039 | drop_inmem_pages_all(sbi); | |
3aab8f82 | 2040 | return err; |
eb47b800 JK |
2041 | } |
2042 | ||
a1dd3c13 JK |
2043 | static int f2fs_write_end(struct file *file, |
2044 | struct address_space *mapping, | |
2045 | loff_t pos, unsigned len, unsigned copied, | |
2046 | struct page *page, void *fsdata) | |
2047 | { | |
2048 | struct inode *inode = page->mapping->host; | |
2049 | ||
32cbbe59 | 2050 | trace_android_fs_datawrite_end(inode, pos, len); |
dfb2bf38 CY |
2051 | trace_f2fs_write_end(inode, pos, len, copied); |
2052 | ||
c1286ff4 JK |
2053 | /* |
2054 | * This should be come from len == PAGE_SIZE, and we expect copied | |
2055 | * should be PAGE_SIZE. Otherwise, we treat it with zero copied and | |
2056 | * let generic_perform_write() try to copy data again through copied=0. | |
2057 | */ | |
2058 | if (!PageUptodate(page)) { | |
ff919929 | 2059 | if (unlikely(copied != len)) |
c1286ff4 JK |
2060 | copied = 0; |
2061 | else | |
2062 | SetPageUptodate(page); | |
a1dd3c13 | 2063 | } |
c1286ff4 JK |
2064 | if (!copied) |
2065 | goto unlock_out; | |
2066 | ||
2067 | set_page_dirty(page); | |
a1dd3c13 | 2068 | |
c1286ff4 JK |
2069 | if (pos + copied > i_size_read(inode)) |
2070 | f2fs_i_size_write(inode, pos + copied); | |
2071 | unlock_out: | |
75c3c8bc | 2072 | f2fs_put_page(page, 1); |
c1286ff4 | 2073 | f2fs_update_time(F2FS_I_SB(inode), REQ_TIME); |
a1dd3c13 JK |
2074 | return copied; |
2075 | } | |
2076 | ||
6f673763 OS |
2077 | static int check_direct_IO(struct inode *inode, struct iov_iter *iter, |
2078 | loff_t offset) | |
944fcfc1 JK |
2079 | { |
2080 | unsigned blocksize_mask = inode->i_sb->s_blocksize - 1; | |
944fcfc1 | 2081 | |
944fcfc1 JK |
2082 | if (offset & blocksize_mask) |
2083 | return -EINVAL; | |
2084 | ||
5b46f25d AV |
2085 | if (iov_iter_alignment(iter) & blocksize_mask) |
2086 | return -EINVAL; | |
2087 | ||
944fcfc1 JK |
2088 | return 0; |
2089 | } | |
2090 | ||
22c6186e | 2091 | static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter, |
c1286ff4 | 2092 | loff_t offset) |
eb47b800 | 2093 | { |
c1286ff4 | 2094 | struct address_space *mapping = iocb->ki_filp->f_mapping; |
3aab8f82 CY |
2095 | struct inode *inode = mapping->host; |
2096 | size_t count = iov_iter_count(iter); | |
c1286ff4 | 2097 | int rw = iov_iter_rw(iter); |
3aab8f82 | 2098 | int err; |
944fcfc1 | 2099 | |
c15e8599 CY |
2100 | err = check_direct_IO(inode, iter, offset); |
2101 | if (err) | |
2102 | return err; | |
944fcfc1 | 2103 | |
8b2c7581 | 2104 | if (__force_buffered_io(inode, rw)) |
07f01079 | 2105 | return 0; |
70407fad | 2106 | |
32cbbe59 | 2107 | if (trace_android_fs_dataread_start_enabled() && |
d854b688 MS |
2108 | (iov_iter_rw(iter) == READ)) { |
2109 | char *path, pathbuf[MAX_TRACE_PATHBUF_LEN]; | |
2110 | ||
2111 | path = android_fstrace_get_pathname(pathbuf, | |
2112 | MAX_TRACE_PATHBUF_LEN, | |
2113 | inode); | |
32cbbe59 | 2114 | trace_android_fs_dataread_start(inode, offset, |
d854b688 | 2115 | count, current->pid, path, |
32cbbe59 | 2116 | current->comm); |
d854b688 | 2117 | } |
32cbbe59 | 2118 | if (trace_android_fs_datawrite_start_enabled() && |
d854b688 MS |
2119 | (iov_iter_rw(iter) == WRITE)) { |
2120 | char *path, pathbuf[MAX_TRACE_PATHBUF_LEN]; | |
32cbbe59 | 2121 | |
d854b688 MS |
2122 | path = android_fstrace_get_pathname(pathbuf, |
2123 | MAX_TRACE_PATHBUF_LEN, | |
2124 | inode); | |
2125 | trace_android_fs_datawrite_start(inode, offset, count, | |
2126 | current->pid, path, | |
2127 | current->comm); | |
2128 | } | |
c1286ff4 | 2129 | trace_f2fs_direct_IO_enter(inode, offset, count, rw); |
59b802e5 | 2130 | |
c1286ff4 | 2131 | down_read(&F2FS_I(inode)->dio_rwsem[rw]); |
e2b4e2bc | 2132 | err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio); |
c1286ff4 JK |
2133 | up_read(&F2FS_I(inode)->dio_rwsem[rw]); |
2134 | ||
2135 | if (rw == WRITE) { | |
13f00235 JK |
2136 | if (err > 0) { |
2137 | f2fs_update_iostat(F2FS_I_SB(inode), APP_DIRECT_IO, | |
2138 | err); | |
c1286ff4 | 2139 | set_inode_flag(inode, FI_UPDATE_WRITE); |
13f00235 | 2140 | } else if (err < 0) { |
c1286ff4 | 2141 | f2fs_write_failed(mapping, offset + count); |
13f00235 | 2142 | } |
c1286ff4 | 2143 | } |
70407fad | 2144 | |
32cbbe59 MS |
2145 | if (trace_android_fs_dataread_start_enabled() && |
2146 | (iov_iter_rw(iter) == READ)) | |
2147 | trace_android_fs_dataread_end(inode, offset, count); | |
2148 | if (trace_android_fs_datawrite_start_enabled() && | |
2149 | (iov_iter_rw(iter) == WRITE)) | |
2150 | trace_android_fs_datawrite_end(inode, offset, count); | |
2151 | ||
c1286ff4 | 2152 | trace_f2fs_direct_IO_exit(inode, offset, count, rw, err); |
70407fad | 2153 | |
3aab8f82 | 2154 | return err; |
eb47b800 JK |
2155 | } |
2156 | ||
487261f3 CY |
2157 | void f2fs_invalidate_page(struct page *page, unsigned int offset, |
2158 | unsigned int length) | |
eb47b800 JK |
2159 | { |
2160 | struct inode *inode = page->mapping->host; | |
487261f3 | 2161 | struct f2fs_sb_info *sbi = F2FS_I_SB(inode); |
a7ffdbe2 | 2162 | |
487261f3 | 2163 | if (inode->i_ino >= F2FS_ROOT_INO(sbi) && |
c1286ff4 | 2164 | (offset % PAGE_SIZE || length != PAGE_SIZE)) |
a7ffdbe2 JK |
2165 | return; |
2166 | ||
487261f3 | 2167 | if (PageDirty(page)) { |
75bb19d8 | 2168 | if (inode->i_ino == F2FS_META_INO(sbi)) { |
487261f3 | 2169 | dec_page_count(sbi, F2FS_DIRTY_META); |
75bb19d8 | 2170 | } else if (inode->i_ino == F2FS_NODE_INO(sbi)) { |
487261f3 | 2171 | dec_page_count(sbi, F2FS_DIRTY_NODES); |
75bb19d8 | 2172 | } else { |
487261f3 | 2173 | inode_dec_dirty_pages(inode); |
75bb19d8 CY |
2174 | remove_dirty_inode(inode); |
2175 | } | |
487261f3 | 2176 | } |
decd36b6 CY |
2177 | |
2178 | /* This is atomic written page, keep Private */ | |
2179 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
13f00235 | 2180 | return drop_inmem_page(inode, page); |
decd36b6 | 2181 | |
c1286ff4 | 2182 | set_page_private(page, 0); |
eb47b800 JK |
2183 | ClearPagePrivate(page); |
2184 | } | |
2185 | ||
487261f3 | 2186 | int f2fs_release_page(struct page *page, gfp_t wait) |
eb47b800 | 2187 | { |
f68daeeb JK |
2188 | /* If this is dirty page, keep PagePrivate */ |
2189 | if (PageDirty(page)) | |
2190 | return 0; | |
2191 | ||
decd36b6 CY |
2192 | /* This is atomic written page, keep Private */ |
2193 | if (IS_ATOMIC_WRITTEN_PAGE(page)) | |
2194 | return 0; | |
2195 | ||
c1286ff4 | 2196 | set_page_private(page, 0); |
eb47b800 | 2197 | ClearPagePrivate(page); |
c3850aa1 | 2198 | return 1; |
eb47b800 JK |
2199 | } |
2200 | ||
c1286ff4 JK |
2201 | /* |
2202 | * This was copied from __set_page_dirty_buffers which gives higher performance | |
2203 | * in very high speed storages. (e.g., pmem) | |
2204 | */ | |
2205 | void f2fs_set_page_dirty_nobuffers(struct page *page) | |
2206 | { | |
2207 | struct address_space *mapping = page->mapping; | |
2208 | struct mem_cgroup *memcg; | |
2209 | unsigned long flags; | |
2210 | ||
2211 | if (unlikely(!mapping)) | |
2212 | return; | |
2213 | ||
2214 | spin_lock(&mapping->private_lock); | |
2215 | memcg = mem_cgroup_begin_page_stat(page); | |
2216 | SetPageDirty(page); | |
2217 | spin_unlock(&mapping->private_lock); | |
2218 | ||
2219 | spin_lock_irqsave(&mapping->tree_lock, flags); | |
2220 | WARN_ON_ONCE(!PageUptodate(page)); | |
2221 | account_page_dirtied(page, mapping, memcg); | |
2222 | radix_tree_tag_set(&mapping->page_tree, | |
2223 | page_index(page), PAGECACHE_TAG_DIRTY); | |
2224 | spin_unlock_irqrestore(&mapping->tree_lock, flags); | |
2225 | ||
2226 | mem_cgroup_end_page_stat(memcg); | |
2227 | ||
2228 | __mark_inode_dirty(mapping->host, I_DIRTY_PAGES); | |
2229 | return; | |
2230 | } | |
2231 | ||
eb47b800 JK |
2232 | static int f2fs_set_data_page_dirty(struct page *page) |
2233 | { | |
2234 | struct address_space *mapping = page->mapping; | |
2235 | struct inode *inode = mapping->host; | |
2236 | ||
26c6b887 JK |
2237 | trace_f2fs_set_page_dirty(page, DATA); |
2238 | ||
c1286ff4 JK |
2239 | if (!PageUptodate(page)) |
2240 | SetPageUptodate(page); | |
34ba94ba | 2241 | |
dc8b8cea | 2242 | if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) { |
decd36b6 CY |
2243 | if (!IS_ATOMIC_WRITTEN_PAGE(page)) { |
2244 | register_inmem_page(inode, page); | |
2245 | return 1; | |
2246 | } | |
2247 | /* | |
2248 | * Previously, this page has been registered, we just | |
2249 | * return here. | |
2250 | */ | |
2251 | return 0; | |
34ba94ba JK |
2252 | } |
2253 | ||
eb47b800 | 2254 | if (!PageDirty(page)) { |
c1286ff4 | 2255 | f2fs_set_page_dirty_nobuffers(page); |
a7ffdbe2 | 2256 | update_dirty_page(inode, page); |
eb47b800 JK |
2257 | return 1; |
2258 | } | |
2259 | return 0; | |
2260 | } | |
2261 | ||
c01e54b7 JK |
2262 | static sector_t f2fs_bmap(struct address_space *mapping, sector_t block) |
2263 | { | |
454ae7e5 CY |
2264 | struct inode *inode = mapping->host; |
2265 | ||
1d373a0e JK |
2266 | if (f2fs_has_inline_data(inode)) |
2267 | return 0; | |
2268 | ||
2269 | /* make sure allocating whole blocks */ | |
2270 | if (mapping_tagged(mapping, PAGECACHE_TAG_DIRTY)) | |
2271 | filemap_write_and_wait(mapping); | |
2272 | ||
e2b4e2bc | 2273 | return generic_block_bmap(mapping, block, get_data_block_bmap); |
429511cd CY |
2274 | } |
2275 | ||
c1286ff4 JK |
2276 | #ifdef CONFIG_MIGRATION |
2277 | #include <linux/migrate.h> | |
2278 | ||
2279 | int f2fs_migrate_page(struct address_space *mapping, | |
2280 | struct page *newpage, struct page *page, enum migrate_mode mode) | |
2281 | { | |
2282 | int rc, extra_count; | |
2283 | struct f2fs_inode_info *fi = F2FS_I(mapping->host); | |
2284 | bool atomic_written = IS_ATOMIC_WRITTEN_PAGE(page); | |
2285 | ||
2286 | BUG_ON(PageWriteback(page)); | |
2287 | ||
2288 | /* migrating an atomic written page is safe with the inmem_lock hold */ | |
13f00235 JK |
2289 | if (atomic_written) { |
2290 | if (mode != MIGRATE_SYNC) | |
2291 | return -EBUSY; | |
2292 | if (!mutex_trylock(&fi->inmem_lock)) | |
2293 | return -EAGAIN; | |
2294 | } | |
c1286ff4 JK |
2295 | |
2296 | /* | |
2297 | * A reference is expected if PagePrivate set when move mapping, | |
2298 | * however F2FS breaks this for maintaining dirty page counts when | |
2299 | * truncating pages. So here adjusting the 'extra_count' make it work. | |
2300 | */ | |
2301 | extra_count = (atomic_written ? 1 : 0) - page_has_private(page); | |
2302 | rc = migrate_page_move_mapping(mapping, newpage, | |
2303 | page, NULL, mode, extra_count); | |
2304 | if (rc != MIGRATEPAGE_SUCCESS) { | |
2305 | if (atomic_written) | |
2306 | mutex_unlock(&fi->inmem_lock); | |
2307 | return rc; | |
2308 | } | |
2309 | ||
2310 | if (atomic_written) { | |
2311 | struct inmem_pages *cur; | |
2312 | list_for_each_entry(cur, &fi->inmem_pages, list) | |
2313 | if (cur->page == page) { | |
2314 | cur->page = newpage; | |
2315 | break; | |
2316 | } | |
2317 | mutex_unlock(&fi->inmem_lock); | |
2318 | put_page(page); | |
2319 | get_page(newpage); | |
2320 | } | |
2321 | ||
2322 | if (PagePrivate(page)) | |
2323 | SetPagePrivate(newpage); | |
2324 | set_page_private(newpage, page_private(page)); | |
2325 | ||
2326 | migrate_page_copy(newpage, page); | |
2327 | ||
2328 | return MIGRATEPAGE_SUCCESS; | |
2329 | } | |
2330 | #endif | |
2331 | ||
eb47b800 JK |
2332 | const struct address_space_operations f2fs_dblock_aops = { |
2333 | .readpage = f2fs_read_data_page, | |
2334 | .readpages = f2fs_read_data_pages, | |
2335 | .writepage = f2fs_write_data_page, | |
2336 | .writepages = f2fs_write_data_pages, | |
2337 | .write_begin = f2fs_write_begin, | |
a1dd3c13 | 2338 | .write_end = f2fs_write_end, |
eb47b800 | 2339 | .set_page_dirty = f2fs_set_data_page_dirty, |
487261f3 CY |
2340 | .invalidatepage = f2fs_invalidate_page, |
2341 | .releasepage = f2fs_release_page, | |
eb47b800 | 2342 | .direct_IO = f2fs_direct_IO, |
c01e54b7 | 2343 | .bmap = f2fs_bmap, |
c1286ff4 JK |
2344 | #ifdef CONFIG_MIGRATION |
2345 | .migratepage = f2fs_migrate_page, | |
2346 | #endif | |
eb47b800 | 2347 | }; |