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