Commit | Line | Data |
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b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
9888c340 DS |
2 | |
3 | #ifndef BTRFS_EXTENT_IO_H | |
4 | #define BTRFS_EXTENT_IO_H | |
d1310b2e CM |
5 | |
6 | #include <linux/rbtree.h> | |
b7ac31b7 | 7 | #include <linux/refcount.h> |
ac467772 | 8 | #include "ulist.h" |
d1310b2e CM |
9 | |
10 | /* bits for the extent state */ | |
9ee49a04 DS |
11 | #define EXTENT_DIRTY (1U << 0) |
12 | #define EXTENT_WRITEBACK (1U << 1) | |
13 | #define EXTENT_UPTODATE (1U << 2) | |
14 | #define EXTENT_LOCKED (1U << 3) | |
15 | #define EXTENT_NEW (1U << 4) | |
16 | #define EXTENT_DELALLOC (1U << 5) | |
17 | #define EXTENT_DEFRAG (1U << 6) | |
18 | #define EXTENT_BOUNDARY (1U << 9) | |
19 | #define EXTENT_NODATASUM (1U << 10) | |
a315e68f | 20 | #define EXTENT_CLEAR_META_RESV (1U << 11) |
ba8f5206 NB |
21 | #define EXTENT_NEED_WAIT (1U << 12) |
22 | #define EXTENT_DAMAGED (1U << 13) | |
23 | #define EXTENT_NORESERVE (1U << 14) | |
24 | #define EXTENT_QGROUP_RESERVED (1U << 15) | |
25 | #define EXTENT_CLEAR_DATA_RESV (1U << 16) | |
26 | #define EXTENT_DELALLOC_NEW (1U << 17) | |
9ee49a04 | 27 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
a315e68f FM |
28 | #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \ |
29 | EXTENT_CLEAR_DATA_RESV) | |
ba8f5206 | 30 | #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING) |
d1310b2e | 31 | |
261507a0 LZ |
32 | /* |
33 | * flags for bio submission. The high bits indicate the compression | |
34 | * type for this bio | |
35 | */ | |
c8b97818 | 36 | #define EXTENT_BIO_COMPRESSED 1 |
261507a0 | 37 | #define EXTENT_BIO_FLAG_SHIFT 16 |
c8b97818 | 38 | |
80cb3836 DS |
39 | enum { |
40 | EXTENT_BUFFER_UPTODATE, | |
41 | EXTENT_BUFFER_DIRTY, | |
42 | EXTENT_BUFFER_CORRUPT, | |
43 | /* this got triggered by readahead */ | |
44 | EXTENT_BUFFER_READAHEAD, | |
45 | EXTENT_BUFFER_TREE_REF, | |
46 | EXTENT_BUFFER_STALE, | |
47 | EXTENT_BUFFER_WRITEBACK, | |
48 | /* read IO error */ | |
49 | EXTENT_BUFFER_READ_ERR, | |
50 | EXTENT_BUFFER_UNMAPPED, | |
51 | EXTENT_BUFFER_IN_TREE, | |
52 | /* write IO error */ | |
53 | EXTENT_BUFFER_WRITE_ERR, | |
54 | }; | |
b4ce94de | 55 | |
da2c7009 | 56 | /* these are flags for __process_pages_contig */ |
c2790a2e JB |
57 | #define PAGE_UNLOCK (1 << 0) |
58 | #define PAGE_CLEAR_DIRTY (1 << 1) | |
59 | #define PAGE_SET_WRITEBACK (1 << 2) | |
60 | #define PAGE_END_WRITEBACK (1 << 3) | |
61 | #define PAGE_SET_PRIVATE2 (1 << 4) | |
704de49d | 62 | #define PAGE_SET_ERROR (1 << 5) |
da2c7009 | 63 | #define PAGE_LOCK (1 << 6) |
a791e35e | 64 | |
d1310b2e CM |
65 | /* |
66 | * page->private values. Every page that is controlled by the extent | |
67 | * map has page->private set to one. | |
68 | */ | |
69 | #define EXTENT_PAGE_PRIVATE 1 | |
d1310b2e | 70 | |
2fe1d551 OS |
71 | /* |
72 | * The extent buffer bitmap operations are done with byte granularity instead of | |
73 | * word granularity for two reasons: | |
74 | * 1. The bitmaps must be little-endian on disk. | |
75 | * 2. Bitmap items are not guaranteed to be aligned to a word and therefore a | |
76 | * single word in a bitmap may straddle two pages in the extent buffer. | |
77 | */ | |
78 | #define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE) | |
79 | #define BYTE_MASK ((1 << BITS_PER_BYTE) - 1) | |
80 | #define BITMAP_FIRST_BYTE_MASK(start) \ | |
81 | ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK) | |
82 | #define BITMAP_LAST_BYTE_MASK(nbits) \ | |
83 | (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1))) | |
84 | ||
70dec807 | 85 | struct extent_state; |
ea466794 | 86 | struct btrfs_root; |
6fc0ef68 | 87 | struct btrfs_inode; |
facc8a22 | 88 | struct btrfs_io_bio; |
47dc196a | 89 | struct io_failure_record; |
70dec807 | 90 | |
8c27cb35 | 91 | typedef blk_status_t (extent_submit_bio_hook_t)(void *private_data, struct bio *bio, |
81a75f67 MC |
92 | int mirror_num, unsigned long bio_flags, |
93 | u64 bio_offset); | |
a758781d DS |
94 | |
95 | typedef blk_status_t (extent_submit_bio_start_t)(void *private_data, | |
d0779291 | 96 | struct bio *bio, u64 bio_offset); |
a758781d | 97 | |
d1310b2e | 98 | struct extent_io_ops { |
4d53dddb | 99 | /* |
52042d8e | 100 | * The following callbacks must be always defined, the function |
4d53dddb DS |
101 | * pointer will be called unconditionally. |
102 | */ | |
44b8bd7e | 103 | extent_submit_bio_hook_t *submit_bio_hook; |
4d53dddb DS |
104 | int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset, |
105 | struct page *page, u64 start, u64 end, | |
106 | int mirror); | |
d1310b2e CM |
107 | }; |
108 | ||
109 | struct extent_io_tree { | |
110 | struct rb_root state; | |
c6100a4b | 111 | void *private_data; |
d1310b2e | 112 | u64 dirty_bytes; |
0b32f4bb | 113 | int track_uptodate; |
70dec807 | 114 | spinlock_t lock; |
e8c9f186 | 115 | const struct extent_io_ops *ops; |
d1310b2e CM |
116 | }; |
117 | ||
118 | struct extent_state { | |
119 | u64 start; | |
120 | u64 end; /* inclusive */ | |
d1310b2e | 121 | struct rb_node rb_node; |
9ed74f2d JB |
122 | |
123 | /* ADD NEW ELEMENTS AFTER THIS */ | |
d1310b2e | 124 | wait_queue_head_t wq; |
b7ac31b7 | 125 | refcount_t refs; |
9ee49a04 | 126 | unsigned state; |
d1310b2e | 127 | |
47dc196a | 128 | struct io_failure_record *failrec; |
d1310b2e | 129 | |
6d49ba1b | 130 | #ifdef CONFIG_BTRFS_DEBUG |
2d2ae547 | 131 | struct list_head leak_list; |
6d49ba1b | 132 | #endif |
d1310b2e CM |
133 | }; |
134 | ||
727011e0 | 135 | #define INLINE_EXTENT_BUFFER_PAGES 16 |
09cbfeaf | 136 | #define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_SIZE) |
d1310b2e CM |
137 | struct extent_buffer { |
138 | u64 start; | |
139 | unsigned long len; | |
b4ce94de | 140 | unsigned long bflags; |
f28491e0 | 141 | struct btrfs_fs_info *fs_info; |
3083ee2e | 142 | spinlock_t refs_lock; |
727011e0 | 143 | atomic_t refs; |
0b32f4bb | 144 | atomic_t io_pages; |
5cf1ab56 | 145 | int read_mirror; |
19fe0a8b | 146 | struct rcu_head rcu_head; |
5b25f70f | 147 | pid_t lock_owner; |
b4ce94de | 148 | |
bd681513 CM |
149 | /* count of read lock holders on the extent buffer */ |
150 | atomic_t write_locks; | |
151 | atomic_t read_locks; | |
152 | atomic_t blocking_writers; | |
153 | atomic_t blocking_readers; | |
154 | atomic_t spinning_readers; | |
155 | atomic_t spinning_writers; | |
656f30db FM |
156 | short lock_nested; |
157 | /* >= 0 if eb belongs to a log tree, -1 otherwise */ | |
158 | short log_index; | |
bd681513 CM |
159 | |
160 | /* protects write locks */ | |
161 | rwlock_t lock; | |
162 | ||
163 | /* readers use lock_wq while they wait for the write | |
164 | * lock holders to unlock | |
165 | */ | |
166 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 167 | |
bd681513 CM |
168 | /* writers use read_lock_wq while they wait for readers |
169 | * to unlock | |
b4ce94de | 170 | */ |
bd681513 | 171 | wait_queue_head_t read_lock_wq; |
b8dae313 | 172 | struct page *pages[INLINE_EXTENT_BUFFER_PAGES]; |
6d49ba1b ES |
173 | #ifdef CONFIG_BTRFS_DEBUG |
174 | struct list_head leak_list; | |
175 | #endif | |
d1310b2e CM |
176 | }; |
177 | ||
ac467772 QW |
178 | /* |
179 | * Structure to record how many bytes and which ranges are set/cleared | |
180 | */ | |
181 | struct extent_changeset { | |
182 | /* How many bytes are set/cleared in this operation */ | |
7bc329c1 | 183 | unsigned int bytes_changed; |
ac467772 QW |
184 | |
185 | /* Changed ranges */ | |
53d32359 | 186 | struct ulist range_changed; |
ac467772 QW |
187 | }; |
188 | ||
364ecf36 QW |
189 | static inline void extent_changeset_init(struct extent_changeset *changeset) |
190 | { | |
191 | changeset->bytes_changed = 0; | |
192 | ulist_init(&changeset->range_changed); | |
193 | } | |
194 | ||
195 | static inline struct extent_changeset *extent_changeset_alloc(void) | |
196 | { | |
197 | struct extent_changeset *ret; | |
198 | ||
199 | ret = kmalloc(sizeof(*ret), GFP_KERNEL); | |
200 | if (!ret) | |
201 | return NULL; | |
202 | ||
203 | extent_changeset_init(ret); | |
204 | return ret; | |
205 | } | |
206 | ||
207 | static inline void extent_changeset_release(struct extent_changeset *changeset) | |
208 | { | |
209 | if (!changeset) | |
210 | return; | |
211 | changeset->bytes_changed = 0; | |
212 | ulist_release(&changeset->range_changed); | |
213 | } | |
214 | ||
215 | static inline void extent_changeset_free(struct extent_changeset *changeset) | |
216 | { | |
217 | if (!changeset) | |
218 | return; | |
219 | extent_changeset_release(changeset); | |
220 | kfree(changeset); | |
221 | } | |
222 | ||
261507a0 LZ |
223 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
224 | int compress_type) | |
225 | { | |
226 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
227 | } | |
228 | ||
229 | static inline int extent_compress_type(unsigned long bio_flags) | |
230 | { | |
231 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
232 | } | |
233 | ||
d1310b2e CM |
234 | struct extent_map_tree; |
235 | ||
fc4f21b1 | 236 | typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode, |
d1310b2e | 237 | struct page *page, |
306e16ce | 238 | size_t pg_offset, |
d1310b2e CM |
239 | u64 start, u64 len, |
240 | int create); | |
241 | ||
c6100a4b | 242 | void extent_io_tree_init(struct extent_io_tree *tree, void *private_data); |
477a30ba | 243 | int try_release_extent_mapping(struct page *page, gfp_t mask); |
f7a52a40 | 244 | int try_release_extent_buffer(struct page *page); |
1edbb734 | 245 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
ff13db41 | 246 | struct extent_state **cached); |
cd716d8f DS |
247 | |
248 | static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) | |
249 | { | |
250 | return lock_extent_bits(tree, start, end, NULL); | |
251 | } | |
252 | ||
d0082371 | 253 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); |
d1310b2e | 254 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 255 | get_extent_t *get_extent, int mirror_num); |
d1310b2e | 256 | int __init extent_io_init(void); |
e67c718b | 257 | void __cold extent_io_exit(void); |
d1310b2e CM |
258 | |
259 | u64 count_range_bits(struct extent_io_tree *tree, | |
260 | u64 *start, u64 search_end, | |
9ee49a04 | 261 | u64 max_bytes, unsigned bits, int contig); |
d1310b2e | 262 | |
4845e44f | 263 | void free_extent_state(struct extent_state *state); |
d1310b2e | 264 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 265 | unsigned bits, int filled, |
41074888 | 266 | struct extent_state *cached_state); |
fefdc557 | 267 | int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
f734c44a | 268 | unsigned bits, struct extent_changeset *changeset); |
e6dcd2dc | 269 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 270 | unsigned bits, int wake, int delete, |
ae0f1625 | 271 | struct extent_state **cached); |
66b0c887 DS |
272 | int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
273 | unsigned bits, int wake, int delete, | |
274 | struct extent_state **cached, gfp_t mask, | |
275 | struct extent_changeset *changeset); | |
c6317955 | 276 | |
e83b1d91 DS |
277 | static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) |
278 | { | |
ae0f1625 | 279 | return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL); |
e83b1d91 DS |
280 | } |
281 | ||
282 | static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start, | |
e43bbe5e | 283 | u64 end, struct extent_state **cached) |
e83b1d91 | 284 | { |
66b0c887 | 285 | return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, |
e43bbe5e | 286 | GFP_NOFS, NULL); |
e83b1d91 DS |
287 | } |
288 | ||
d810a4be DS |
289 | static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree, |
290 | u64 start, u64 end, struct extent_state **cached) | |
e83b1d91 | 291 | { |
d810a4be DS |
292 | return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, |
293 | GFP_ATOMIC, NULL); | |
e83b1d91 DS |
294 | } |
295 | ||
296 | static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start, | |
91166212 | 297 | u64 end, unsigned bits) |
e83b1d91 DS |
298 | { |
299 | int wake = 0; | |
300 | ||
301 | if (bits & EXTENT_LOCKED) | |
302 | wake = 1; | |
303 | ||
ae0f1625 | 304 | return clear_extent_bit(tree, start, end, bits, wake, 0, NULL); |
e83b1d91 DS |
305 | } |
306 | ||
d38ed27f | 307 | int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c53b912 | 308 | unsigned bits, struct extent_changeset *changeset); |
4845e44f | 309 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 310 | unsigned bits, u64 *failed_start, |
4845e44f | 311 | struct extent_state **cached_state, gfp_t mask); |
c6317955 DS |
312 | |
313 | static inline int set_extent_bits(struct extent_io_tree *tree, u64 start, | |
ceeb0ae7 | 314 | u64 end, unsigned bits) |
c6317955 | 315 | { |
ceeb0ae7 | 316 | return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS); |
c6317955 DS |
317 | } |
318 | ||
e83b1d91 | 319 | static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, |
f08dc36f | 320 | u64 end, struct extent_state **cached_state) |
e83b1d91 | 321 | { |
66b0c887 | 322 | return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0, |
f08dc36f | 323 | cached_state, GFP_NOFS, NULL); |
e83b1d91 | 324 | } |
c6317955 DS |
325 | |
326 | static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start, | |
327 | u64 end, gfp_t mask) | |
328 | { | |
329 | return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, | |
330 | NULL, mask); | |
331 | } | |
332 | ||
e83b1d91 | 333 | static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start, |
0e6ec385 | 334 | u64 end, struct extent_state **cached) |
e83b1d91 DS |
335 | { |
336 | return clear_extent_bit(tree, start, end, | |
337 | EXTENT_DIRTY | EXTENT_DELALLOC | | |
0e6ec385 | 338 | EXTENT_DO_ACCOUNTING, 0, 0, cached); |
e83b1d91 DS |
339 | } |
340 | ||
462d6fac | 341 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 342 | unsigned bits, unsigned clear_bits, |
210aa277 | 343 | struct extent_state **cached_state); |
c6317955 DS |
344 | |
345 | static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start, | |
e3b8a485 FM |
346 | u64 end, unsigned int extra_bits, |
347 | struct extent_state **cached_state) | |
c6317955 DS |
348 | { |
349 | return set_extent_bit(tree, start, end, | |
e3b8a485 | 350 | EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits, |
7cd8c752 | 351 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
352 | } |
353 | ||
354 | static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start, | |
018ed4f7 | 355 | u64 end, struct extent_state **cached_state) |
c6317955 DS |
356 | { |
357 | return set_extent_bit(tree, start, end, | |
358 | EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, | |
018ed4f7 | 359 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
360 | } |
361 | ||
362 | static inline int set_extent_new(struct extent_io_tree *tree, u64 start, | |
3744dbeb | 363 | u64 end) |
c6317955 | 364 | { |
3744dbeb DS |
365 | return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, |
366 | GFP_NOFS); | |
c6317955 DS |
367 | } |
368 | ||
369 | static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, | |
370 | u64 end, struct extent_state **cached_state, gfp_t mask) | |
371 | { | |
372 | return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL, | |
373 | cached_state, mask); | |
374 | } | |
375 | ||
d1310b2e | 376 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
9ee49a04 | 377 | u64 *start_ret, u64 *end_ret, unsigned bits, |
e6138876 | 378 | struct extent_state **cached_state); |
d1310b2e CM |
379 | int extent_invalidatepage(struct extent_io_tree *tree, |
380 | struct page *page, unsigned long offset); | |
0a9b0e53 | 381 | int extent_write_full_page(struct page *page, struct writeback_control *wbc); |
5e3ee236 | 382 | int extent_write_locked_range(struct inode *inode, u64 start, u64 end, |
771ed689 | 383 | int mode); |
8ae225a8 | 384 | int extent_writepages(struct address_space *mapping, |
d1310b2e | 385 | struct writeback_control *wbc); |
0b32f4bb JB |
386 | int btree_write_cache_pages(struct address_space *mapping, |
387 | struct writeback_control *wbc); | |
2a3ff0ad NB |
388 | int extent_readpages(struct address_space *mapping, struct list_head *pages, |
389 | unsigned nr_pages); | |
1506fcc8 | 390 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
2135fb9b | 391 | __u64 start, __u64 len); |
d1310b2e CM |
392 | void set_page_extent_mapped(struct page *page); |
393 | ||
f28491e0 | 394 | struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, |
ce3e6984 | 395 | u64 start); |
0f331229 OS |
396 | struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
397 | u64 start, unsigned long len); | |
3f556f78 | 398 | struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
da17066c | 399 | u64 start); |
815a51c7 | 400 | struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src); |
f28491e0 | 401 | struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info, |
452c75c3 | 402 | u64 start); |
d1310b2e | 403 | void free_extent_buffer(struct extent_buffer *eb); |
3083ee2e | 404 | void free_extent_buffer_stale(struct extent_buffer *eb); |
bb82ab88 AJ |
405 | #define WAIT_NONE 0 |
406 | #define WAIT_COMPLETE 1 | |
407 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 408 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
8436ea91 | 409 | struct extent_buffer *eb, int wait, |
6af49dbd | 410 | int mirror_num); |
fd8b2b61 | 411 | void wait_on_extent_buffer_writeback(struct extent_buffer *eb); |
479ed9ab | 412 | |
cc5e31a4 | 413 | static inline int num_extent_pages(const struct extent_buffer *eb) |
479ed9ab | 414 | { |
8791d432 DS |
415 | return (round_up(eb->start + eb->len, PAGE_SIZE) >> PAGE_SHIFT) - |
416 | (eb->start >> PAGE_SHIFT); | |
479ed9ab RD |
417 | } |
418 | ||
d1310b2e CM |
419 | static inline void extent_buffer_get(struct extent_buffer *eb) |
420 | { | |
421 | atomic_inc(&eb->refs); | |
422 | } | |
423 | ||
ba020491 AJ |
424 | static inline int extent_buffer_uptodate(struct extent_buffer *eb) |
425 | { | |
426 | return test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags); | |
427 | } | |
428 | ||
1cbb1f45 JM |
429 | int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv, |
430 | unsigned long start, unsigned long len); | |
431 | void read_extent_buffer(const struct extent_buffer *eb, void *dst, | |
d1310b2e CM |
432 | unsigned long start, |
433 | unsigned long len); | |
1cbb1f45 JM |
434 | int read_extent_buffer_to_user(const struct extent_buffer *eb, |
435 | void __user *dst, unsigned long start, | |
550ac1d8 | 436 | unsigned long len); |
f157bf76 DS |
437 | void write_extent_buffer_fsid(struct extent_buffer *eb, const void *src); |
438 | void write_extent_buffer_chunk_tree_uuid(struct extent_buffer *eb, | |
439 | const void *src); | |
d1310b2e CM |
440 | void write_extent_buffer(struct extent_buffer *eb, const void *src, |
441 | unsigned long start, unsigned long len); | |
58e8012c DS |
442 | void copy_extent_buffer_full(struct extent_buffer *dst, |
443 | struct extent_buffer *src); | |
d1310b2e CM |
444 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, |
445 | unsigned long dst_offset, unsigned long src_offset, | |
446 | unsigned long len); | |
447 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
448 | unsigned long src_offset, unsigned long len); | |
449 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
450 | unsigned long src_offset, unsigned long len); | |
b159fa28 DS |
451 | void memzero_extent_buffer(struct extent_buffer *eb, unsigned long start, |
452 | unsigned long len); | |
3e1e8bb7 OS |
453 | int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start, |
454 | unsigned long pos); | |
455 | void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start, | |
456 | unsigned long pos, unsigned long len); | |
457 | void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start, | |
458 | unsigned long pos, unsigned long len); | |
1d4284bd | 459 | void clear_extent_buffer_dirty(struct extent_buffer *eb); |
abb57ef3 | 460 | bool set_extent_buffer_dirty(struct extent_buffer *eb); |
09c25a8c | 461 | void set_extent_buffer_uptodate(struct extent_buffer *eb); |
69ba3927 | 462 | void clear_extent_buffer_uptodate(struct extent_buffer *eb); |
a26e8c9f | 463 | int extent_buffer_under_io(struct extent_buffer *eb); |
1cbb1f45 JM |
464 | int map_private_extent_buffer(const struct extent_buffer *eb, |
465 | unsigned long offset, unsigned long min_len, | |
466 | char **map, unsigned long *map_start, | |
467 | unsigned long *map_len); | |
bd1fa4f0 | 468 | void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end); |
f6311572 | 469 | void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end); |
a9d93e17 | 470 | void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end, |
ba8b04c1 | 471 | u64 delalloc_end, struct page *locked_page, |
9ee49a04 | 472 | unsigned bits_to_clear, |
c2790a2e | 473 | unsigned long page_ops); |
c821e7f3 | 474 | struct bio *btrfs_bio_alloc(struct block_device *bdev, u64 first_byte); |
c5e4c3d7 | 475 | struct bio *btrfs_io_bio_alloc(unsigned int nr_iovecs); |
8b6c1d56 | 476 | struct bio *btrfs_bio_clone(struct bio *bio); |
e477094f | 477 | struct bio *btrfs_bio_clone_partial(struct bio *orig, int offset, int size); |
4a54c8c1 | 478 | |
3ec706c8 | 479 | struct btrfs_fs_info; |
9d4f7f8a | 480 | struct btrfs_inode; |
4a54c8c1 | 481 | |
6ec656bc JB |
482 | int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start, |
483 | u64 length, u64 logical, struct page *page, | |
484 | unsigned int pg_offset, int mirror_num); | |
7870d082 JB |
485 | int clean_io_failure(struct btrfs_fs_info *fs_info, |
486 | struct extent_io_tree *failure_tree, | |
487 | struct extent_io_tree *io_tree, u64 start, | |
488 | struct page *page, u64 ino, unsigned int pg_offset); | |
b5227c07 | 489 | void end_extent_writepage(struct page *page, int err, u64 start, u64 end); |
2ff7e61e JM |
490 | int repair_eb_io_failure(struct btrfs_fs_info *fs_info, |
491 | struct extent_buffer *eb, int mirror_num); | |
2fe6303e MX |
492 | |
493 | /* | |
494 | * When IO fails, either with EIO or csum verification fails, we | |
495 | * try other mirrors that might have a good copy of the data. This | |
496 | * io_failure_record is used to record state as we go through all the | |
497 | * mirrors. If another mirror has good data, the page is set up to date | |
498 | * and things continue. If a good mirror can't be found, the original | |
499 | * bio end_io callback is called to indicate things have failed. | |
500 | */ | |
501 | struct io_failure_record { | |
502 | struct page *page; | |
503 | u64 start; | |
504 | u64 len; | |
505 | u64 logical; | |
506 | unsigned long bio_flags; | |
507 | int this_mirror; | |
508 | int failed_mirror; | |
509 | int in_validation; | |
510 | }; | |
511 | ||
4ac1f4ac | 512 | |
7ab7956e NB |
513 | void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start, |
514 | u64 end); | |
2fe6303e MX |
515 | int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, |
516 | struct io_failure_record **failrec_ret); | |
a0b60d72 | 517 | bool btrfs_check_repairable(struct inode *inode, unsigned failed_bio_pages, |
c3cfb656 | 518 | struct io_failure_record *failrec, int fail_mirror); |
2fe6303e MX |
519 | struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio, |
520 | struct io_failure_record *failrec, | |
521 | struct page *page, int pg_offset, int icsum, | |
8b110e39 | 522 | bio_end_io_t *endio_func, void *data); |
7870d082 JB |
523 | int free_io_failure(struct extent_io_tree *failure_tree, |
524 | struct extent_io_tree *io_tree, | |
525 | struct io_failure_record *rec); | |
294e30fe | 526 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
3522e903 | 527 | bool find_lock_delalloc_range(struct inode *inode, struct extent_io_tree *tree, |
ce9f967f JT |
528 | struct page *locked_page, u64 *start, |
529 | u64 *end); | |
0d4cf4e6 | 530 | #endif |
faa2dbf0 | 531 | struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info, |
da17066c | 532 | u64 start); |
9888c340 | 533 | |
294e30fe | 534 | #endif |