1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef BTRFS_EXTENT_IO_H
4 #define BTRFS_EXTENT_IO_H
5
6 #include <linux/rbtree.h>
7 #include <linux/refcount.h>
8 #include "ulist.h"
9
10 /* bits for the extent state */
11 #define EXTENT_DIRTY (1U << 0)
12 #define EXTENT_UPTODATE (1U << 1)
13 #define EXTENT_LOCKED (1U << 2)
14 #define EXTENT_NEW (1U << 3)
15 #define EXTENT_DELALLOC (1U << 4)
16 #define EXTENT_DEFRAG (1U << 5)
17 #define EXTENT_BOUNDARY (1U << 6)
18 #define EXTENT_NODATASUM (1U << 7)
19 #define EXTENT_CLEAR_META_RESV (1U << 8)
20 #define EXTENT_NEED_WAIT (1U << 9)
21 #define EXTENT_DAMAGED (1U << 10)
22 #define EXTENT_NORESERVE (1U << 11)
23 #define EXTENT_QGROUP_RESERVED (1U << 12)
24 #define EXTENT_CLEAR_DATA_RESV (1U << 13)
25 #define EXTENT_DELALLOC_NEW (1U << 14)
26 #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
27 EXTENT_CLEAR_DATA_RESV)
28 #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING)
29
30 /*
31 * Redefined bits above which are used only in the device allocation tree,
32 * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
33 * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
34 * manipulation functions
35 */
36 #define CHUNK_ALLOCATED EXTENT_DIRTY
37 #define CHUNK_TRIMMED EXTENT_DEFRAG
38 #define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \
39 CHUNK_TRIMMED)
40
41 /*
42 * flags for bio submission. The high bits indicate the compression
43 * type for this bio
44 */
45 #define EXTENT_BIO_COMPRESSED 1
46 #define EXTENT_BIO_FLAG_SHIFT 16
47
48 enum {
49 EXTENT_BUFFER_UPTODATE,
50 EXTENT_BUFFER_DIRTY,
51 EXTENT_BUFFER_CORRUPT,
52 /* this got triggered by readahead */
53 EXTENT_BUFFER_READAHEAD,
54 EXTENT_BUFFER_TREE_REF,
55 EXTENT_BUFFER_STALE,
56 EXTENT_BUFFER_WRITEBACK,
57 /* read IO error */
58 EXTENT_BUFFER_READ_ERR,
59 EXTENT_BUFFER_UNMAPPED,
60 EXTENT_BUFFER_IN_TREE,
61 /* write IO error */
62 EXTENT_BUFFER_WRITE_ERR,
63 };
64
65 /* these are flags for __process_pages_contig */
66 #define PAGE_UNLOCK (1 << 0)
67 #define PAGE_CLEAR_DIRTY (1 << 1)
68 #define PAGE_SET_WRITEBACK (1 << 2)
69 #define PAGE_END_WRITEBACK (1 << 3)
70 #define PAGE_SET_PRIVATE2 (1 << 4)
71 #define PAGE_SET_ERROR (1 << 5)
72 #define PAGE_LOCK (1 << 6)
73
74 /*
75 * page->private values. Every page that is controlled by the extent
76 * map has page->private set to one.
77 */
78 #define EXTENT_PAGE_PRIVATE 1
79
80 /*
81 * The extent buffer bitmap operations are done with byte granularity instead of
82 * word granularity for two reasons:
83 * 1. The bitmaps must be little-endian on disk.
84 * 2. Bitmap items are not guaranteed to be aligned to a word and therefore a
85 * single word in a bitmap may straddle two pages in the extent buffer.
86 */
87 #define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE)
88 #define BYTE_MASK ((1 << BITS_PER_BYTE) - 1)
89 #define BITMAP_FIRST_BYTE_MASK(start) \
90 ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK)
91 #define BITMAP_LAST_BYTE_MASK(nbits) \
92 (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1)))
93
94 struct extent_state;
95 struct btrfs_root;
96 struct btrfs_inode;
97 struct btrfs_io_bio;
98 struct io_failure_record;
99
100
101 typedef blk_status_t (extent_submit_bio_start_t)(void *private_data,
102 struct bio *bio, u64 bio_offset);
103
104 struct extent_io_ops {
105 /*
106 * The following callbacks must be always defined, the function
107 * pointer will be called unconditionally.
108 */
109 blk_status_t (*submit_bio_hook)(struct inode *inode, struct bio *bio,
110 int mirror_num, unsigned long bio_flags);
111 int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset,
112 struct page *page, u64 start, u64 end,
113 int mirror);
114 };
115
116 enum {
117 IO_TREE_FS_INFO_FREED_EXTENTS0,
118 IO_TREE_FS_INFO_FREED_EXTENTS1,
119 IO_TREE_INODE_IO,
120 IO_TREE_INODE_IO_FAILURE,
121 IO_TREE_RELOC_BLOCKS,
122 IO_TREE_TRANS_DIRTY_PAGES,
123 IO_TREE_ROOT_DIRTY_LOG_PAGES,
124 IO_TREE_SELFTEST,
125 };
126
127 struct extent_io_tree {
128 struct rb_root state;
129 struct btrfs_fs_info *fs_info;
130 void *private_data;
131 u64 dirty_bytes;
132 bool track_uptodate;
133
134 /* Who owns this io tree, should be one of IO_TREE_* */
135 u8 owner;
136
137 spinlock_t lock;
138 const struct extent_io_ops *ops;
139 };
140
141 struct extent_state {
142 u64 start;
143 u64 end; /* inclusive */
144 struct rb_node rb_node;
145
146 /* ADD NEW ELEMENTS AFTER THIS */
147 wait_queue_head_t wq;
148 refcount_t refs;
149 unsigned state;
150
151 struct io_failure_record *failrec;
152
153 #ifdef CONFIG_BTRFS_DEBUG
154 struct list_head leak_list;
155 #endif
156 };
157
158 #define INLINE_EXTENT_BUFFER_PAGES 16
159 #define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_SIZE)
160 struct extent_buffer {
161 u64 start;
162 unsigned long len;
163 unsigned long bflags;
164 struct btrfs_fs_info *fs_info;
165 spinlock_t refs_lock;
166 atomic_t refs;
167 atomic_t io_pages;
168 int read_mirror;
169 struct rcu_head rcu_head;
170 pid_t lock_owner;
171
172 int blocking_writers;
173 atomic_t blocking_readers;
174 bool lock_nested;
175 /* >= 0 if eb belongs to a log tree, -1 otherwise */
176 short log_index;
177
178 /* protects write locks */
179 rwlock_t lock;
180
181 /* readers use lock_wq while they wait for the write
182 * lock holders to unlock
183 */
184 wait_queue_head_t write_lock_wq;
185
186 /* writers use read_lock_wq while they wait for readers
187 * to unlock
188 */
189 wait_queue_head_t read_lock_wq;
190 struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
191 #ifdef CONFIG_BTRFS_DEBUG
192 int spinning_writers;
193 atomic_t spinning_readers;
194 atomic_t read_locks;
195 int write_locks;
196 struct list_head leak_list;
197 #endif
198 };
199
200 /*
201 * Structure to record how many bytes and which ranges are set/cleared
202 */
203 struct extent_changeset {
204 /* How many bytes are set/cleared in this operation */
205 u64 bytes_changed;
206
207 /* Changed ranges */
208 struct ulist range_changed;
209 };
210
extent_changeset_init(struct extent_changeset * changeset)211 static inline void extent_changeset_init(struct extent_changeset *changeset)
212 {
213 changeset->bytes_changed = 0;
214 ulist_init(&changeset->range_changed);
215 }
216
extent_changeset_alloc(void)217 static inline struct extent_changeset *extent_changeset_alloc(void)
218 {
219 struct extent_changeset *ret;
220
221 ret = kmalloc(sizeof(*ret), GFP_KERNEL);
222 if (!ret)
223 return NULL;
224
225 extent_changeset_init(ret);
226 return ret;
227 }
228
extent_changeset_release(struct extent_changeset * changeset)229 static inline void extent_changeset_release(struct extent_changeset *changeset)
230 {
231 if (!changeset)
232 return;
233 changeset->bytes_changed = 0;
234 ulist_release(&changeset->range_changed);
235 }
236
extent_changeset_free(struct extent_changeset * changeset)237 static inline void extent_changeset_free(struct extent_changeset *changeset)
238 {
239 if (!changeset)
240 return;
241 extent_changeset_release(changeset);
242 kfree(changeset);
243 }
244
extent_set_compress_type(unsigned long * bio_flags,int compress_type)245 static inline void extent_set_compress_type(unsigned long *bio_flags,
246 int compress_type)
247 {
248 *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT;
249 }
250
extent_compress_type(unsigned long bio_flags)251 static inline int extent_compress_type(unsigned long bio_flags)
252 {
253 return bio_flags >> EXTENT_BIO_FLAG_SHIFT;
254 }
255
256 struct extent_map_tree;
257
258 typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode,
259 struct page *page,
260 size_t pg_offset,
261 u64 start, u64 len,
262 int create);
263
264 void extent_io_tree_init(struct btrfs_fs_info *fs_info,
265 struct extent_io_tree *tree, unsigned int owner,
266 void *private_data);
267 void extent_io_tree_release(struct extent_io_tree *tree);
268 int try_release_extent_mapping(struct page *page, gfp_t mask);
269 int try_release_extent_buffer(struct page *page);
270 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
271 struct extent_state **cached);
272
lock_extent(struct extent_io_tree * tree,u64 start,u64 end)273 static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
274 {
275 return lock_extent_bits(tree, start, end, NULL);
276 }
277
278 int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
279 int extent_read_full_page(struct extent_io_tree *tree, struct page *page,
280 get_extent_t *get_extent, int mirror_num);
281 int __init extent_io_init(void);
282 void __cold extent_io_exit(void);
283
284 u64 count_range_bits(struct extent_io_tree *tree,
285 u64 *start, u64 search_end,
286 u64 max_bytes, unsigned bits, int contig);
287
288 void free_extent_state(struct extent_state *state);
289 int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
290 unsigned bits, int filled,
291 struct extent_state *cached_state);
292 int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
293 unsigned bits, struct extent_changeset *changeset);
294 int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
295 unsigned bits, int wake, int delete,
296 struct extent_state **cached);
297 int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
298 unsigned bits, int wake, int delete,
299 struct extent_state **cached, gfp_t mask,
300 struct extent_changeset *changeset);
301
unlock_extent(struct extent_io_tree * tree,u64 start,u64 end)302 static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
303 {
304 return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL);
305 }
306
unlock_extent_cached(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached)307 static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start,
308 u64 end, struct extent_state **cached)
309 {
310 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
311 GFP_NOFS, NULL);
312 }
313
unlock_extent_cached_atomic(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached)314 static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree,
315 u64 start, u64 end, struct extent_state **cached)
316 {
317 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
318 GFP_ATOMIC, NULL);
319 }
320
clear_extent_bits(struct extent_io_tree * tree,u64 start,u64 end,unsigned bits)321 static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
322 u64 end, unsigned bits)
323 {
324 int wake = 0;
325
326 if (bits & EXTENT_LOCKED)
327 wake = 1;
328
329 return clear_extent_bit(tree, start, end, bits, wake, 0, NULL);
330 }
331
332 int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
333 unsigned bits, struct extent_changeset *changeset);
334 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
335 unsigned bits, u64 *failed_start,
336 struct extent_state **cached_state, gfp_t mask);
337 int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
338 unsigned bits);
339
set_extent_bits(struct extent_io_tree * tree,u64 start,u64 end,unsigned bits)340 static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
341 u64 end, unsigned bits)
342 {
343 return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS);
344 }
345
clear_extent_uptodate(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached_state)346 static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
347 u64 end, struct extent_state **cached_state)
348 {
349 return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0,
350 cached_state, GFP_NOFS, NULL);
351 }
352
set_extent_dirty(struct extent_io_tree * tree,u64 start,u64 end,gfp_t mask)353 static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
354 u64 end, gfp_t mask)
355 {
356 return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL,
357 NULL, mask);
358 }
359
clear_extent_dirty(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached)360 static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
361 u64 end, struct extent_state **cached)
362 {
363 return clear_extent_bit(tree, start, end,
364 EXTENT_DIRTY | EXTENT_DELALLOC |
365 EXTENT_DO_ACCOUNTING, 0, 0, cached);
366 }
367
368 int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
369 unsigned bits, unsigned clear_bits,
370 struct extent_state **cached_state);
371
set_extent_delalloc(struct extent_io_tree * tree,u64 start,u64 end,unsigned int extra_bits,struct extent_state ** cached_state)372 static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
373 u64 end, unsigned int extra_bits,
374 struct extent_state **cached_state)
375 {
376 return set_extent_bit(tree, start, end,
377 EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits,
378 NULL, cached_state, GFP_NOFS);
379 }
380
set_extent_defrag(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached_state)381 static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
382 u64 end, struct extent_state **cached_state)
383 {
384 return set_extent_bit(tree, start, end,
385 EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
386 NULL, cached_state, GFP_NOFS);
387 }
388
set_extent_new(struct extent_io_tree * tree,u64 start,u64 end)389 static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
390 u64 end)
391 {
392 return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL,
393 GFP_NOFS);
394 }
395
set_extent_uptodate(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached_state,gfp_t mask)396 static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
397 u64 end, struct extent_state **cached_state, gfp_t mask)
398 {
399 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL,
400 cached_state, mask);
401 }
402
403 int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
404 u64 *start_ret, u64 *end_ret, unsigned bits,
405 struct extent_state **cached_state);
406 void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
407 u64 *start_ret, u64 *end_ret, unsigned bits);
408 int extent_invalidatepage(struct extent_io_tree *tree,
409 struct page *page, unsigned long offset);
410 int extent_write_full_page(struct page *page, struct writeback_control *wbc);
411 int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
412 int mode);
413 int extent_writepages(struct address_space *mapping,
414 struct writeback_control *wbc);
415 int btree_write_cache_pages(struct address_space *mapping,
416 struct writeback_control *wbc);
417 int extent_readpages(struct address_space *mapping, struct list_head *pages,
418 unsigned nr_pages);
419 int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
420 __u64 start, __u64 len);
421 void set_page_extent_mapped(struct page *page);
422
423 struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info,
424 u64 start);
425 struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
426 u64 start, unsigned long len);
427 struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info,
428 u64 start);
429 struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src);
430 struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info,
431 u64 start);
432 void free_extent_buffer(struct extent_buffer *eb);
433 void free_extent_buffer_stale(struct extent_buffer *eb);
434 #define WAIT_NONE 0
435 #define WAIT_COMPLETE 1
436 #define WAIT_PAGE_LOCK 2
437 int read_extent_buffer_pages(struct extent_buffer *eb, int wait,
438 int mirror_num);
439 void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
440
num_extent_pages(const struct extent_buffer * eb)441 static inline int num_extent_pages(const struct extent_buffer *eb)
442 {
443 return (round_up(eb->start + eb->len, PAGE_SIZE) >> PAGE_SHIFT) -
444 (eb->start >> PAGE_SHIFT);
445 }
446
extent_buffer_get(struct extent_buffer * eb)447 static inline void extent_buffer_get(struct extent_buffer *eb)
448 {
449 atomic_inc(&eb->refs);
450 }
451
extent_buffer_uptodate(struct extent_buffer * eb)452 static inline int extent_buffer_uptodate(struct extent_buffer *eb)
453 {
454 return test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags);
455 }
456
457 int memcmp_extent_buffer(const struct extent_buffer *eb, const void *ptrv,
458 unsigned long start, unsigned long len);
459 void read_extent_buffer(const struct extent_buffer *eb, void *dst,
460 unsigned long start,
461 unsigned long len);
462 int read_extent_buffer_to_user_nofault(const struct extent_buffer *eb,
463 void __user *dst, unsigned long start,
464 unsigned long len);
465 void write_extent_buffer_fsid(struct extent_buffer *eb, const void *src);
466 void write_extent_buffer_chunk_tree_uuid(struct extent_buffer *eb,
467 const void *src);
468 void write_extent_buffer(struct extent_buffer *eb, const void *src,
469 unsigned long start, unsigned long len);
470 void copy_extent_buffer_full(struct extent_buffer *dst,
471 struct extent_buffer *src);
472 void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src,
473 unsigned long dst_offset, unsigned long src_offset,
474 unsigned long len);
475 void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
476 unsigned long src_offset, unsigned long len);
477 void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
478 unsigned long src_offset, unsigned long len);
479 void memzero_extent_buffer(struct extent_buffer *eb, unsigned long start,
480 unsigned long len);
481 int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start,
482 unsigned long pos);
483 void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start,
484 unsigned long pos, unsigned long len);
485 void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start,
486 unsigned long pos, unsigned long len);
487 void clear_extent_buffer_dirty(struct extent_buffer *eb);
488 bool set_extent_buffer_dirty(struct extent_buffer *eb);
489 void set_extent_buffer_uptodate(struct extent_buffer *eb);
490 void clear_extent_buffer_uptodate(struct extent_buffer *eb);
491 int extent_buffer_under_io(struct extent_buffer *eb);
492 int map_private_extent_buffer(const struct extent_buffer *eb,
493 unsigned long offset, unsigned long min_len,
494 char **map, unsigned long *map_start,
495 unsigned long *map_len);
496 void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end);
497 void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end);
498 void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end,
499 struct page *locked_page,
500 unsigned bits_to_clear,
501 unsigned long page_ops);
502 struct bio *btrfs_bio_alloc(u64 first_byte);
503 struct bio *btrfs_io_bio_alloc(unsigned int nr_iovecs);
504 struct bio *btrfs_bio_clone(struct bio *bio);
505 struct bio *btrfs_bio_clone_partial(struct bio *orig, int offset, int size);
506
507 struct btrfs_fs_info;
508 struct btrfs_inode;
509
510 int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
511 u64 length, u64 logical, struct page *page,
512 unsigned int pg_offset, int mirror_num);
513 int clean_io_failure(struct btrfs_fs_info *fs_info,
514 struct extent_io_tree *failure_tree,
515 struct extent_io_tree *io_tree, u64 start,
516 struct page *page, u64 ino, unsigned int pg_offset);
517 void end_extent_writepage(struct page *page, int err, u64 start, u64 end);
518 int btrfs_repair_eb_io_failure(struct extent_buffer *eb, int mirror_num);
519
520 /*
521 * When IO fails, either with EIO or csum verification fails, we
522 * try other mirrors that might have a good copy of the data. This
523 * io_failure_record is used to record state as we go through all the
524 * mirrors. If another mirror has good data, the page is set up to date
525 * and things continue. If a good mirror can't be found, the original
526 * bio end_io callback is called to indicate things have failed.
527 */
528 struct io_failure_record {
529 struct page *page;
530 u64 start;
531 u64 len;
532 u64 logical;
533 unsigned long bio_flags;
534 int this_mirror;
535 int failed_mirror;
536 int in_validation;
537 };
538
539
540 void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start,
541 u64 end);
542 int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
543 struct io_failure_record **failrec_ret);
544 bool btrfs_check_repairable(struct inode *inode, unsigned failed_bio_pages,
545 struct io_failure_record *failrec, int fail_mirror);
546 struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio,
547 struct io_failure_record *failrec,
548 struct page *page, int pg_offset, int icsum,
549 bio_end_io_t *endio_func, void *data);
550 int free_io_failure(struct extent_io_tree *failure_tree,
551 struct extent_io_tree *io_tree,
552 struct io_failure_record *rec);
553 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
554 bool find_lock_delalloc_range(struct inode *inode,
555 struct page *locked_page, u64 *start,
556 u64 *end);
557 #endif
558 struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info,
559 u64 start);
560
561 #endif
562