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Commit | Line | Data |
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d1310b2e CM |
1 | #ifndef __EXTENTIO__ |
2 | #define __EXTENTIO__ | |
3 | ||
4 | #include <linux/rbtree.h> | |
ac467772 | 5 | #include "ulist.h" |
d1310b2e CM |
6 | |
7 | /* bits for the extent state */ | |
9ee49a04 DS |
8 | #define EXTENT_DIRTY (1U << 0) |
9 | #define EXTENT_WRITEBACK (1U << 1) | |
10 | #define EXTENT_UPTODATE (1U << 2) | |
11 | #define EXTENT_LOCKED (1U << 3) | |
12 | #define EXTENT_NEW (1U << 4) | |
13 | #define EXTENT_DELALLOC (1U << 5) | |
14 | #define EXTENT_DEFRAG (1U << 6) | |
15 | #define EXTENT_BOUNDARY (1U << 9) | |
16 | #define EXTENT_NODATASUM (1U << 10) | |
17 | #define EXTENT_DO_ACCOUNTING (1U << 11) | |
18 | #define EXTENT_FIRST_DELALLOC (1U << 12) | |
19 | #define EXTENT_NEED_WAIT (1U << 13) | |
20 | #define EXTENT_DAMAGED (1U << 14) | |
21 | #define EXTENT_NORESERVE (1U << 15) | |
52472553 | 22 | #define EXTENT_QGROUP_RESERVED (1U << 16) |
18513091 | 23 | #define EXTENT_CLEAR_DATA_RESV (1U << 17) |
9ee49a04 DS |
24 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
25 | #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC) | |
d1310b2e | 26 | |
261507a0 LZ |
27 | /* |
28 | * flags for bio submission. The high bits indicate the compression | |
29 | * type for this bio | |
30 | */ | |
c8b97818 | 31 | #define EXTENT_BIO_COMPRESSED 1 |
de0022b9 | 32 | #define EXTENT_BIO_TREE_LOG 2 |
261507a0 | 33 | #define EXTENT_BIO_FLAG_SHIFT 16 |
c8b97818 | 34 | |
b4ce94de CM |
35 | /* these are bit numbers for test/set bit */ |
36 | #define EXTENT_BUFFER_UPTODATE 0 | |
b9473439 | 37 | #define EXTENT_BUFFER_DIRTY 2 |
a826d6dc | 38 | #define EXTENT_BUFFER_CORRUPT 3 |
ab0fff03 | 39 | #define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */ |
3083ee2e JB |
40 | #define EXTENT_BUFFER_TREE_REF 5 |
41 | #define EXTENT_BUFFER_STALE 6 | |
0b32f4bb | 42 | #define EXTENT_BUFFER_WRITEBACK 7 |
656f30db | 43 | #define EXTENT_BUFFER_READ_ERR 8 /* read IO error */ |
815a51c7 | 44 | #define EXTENT_BUFFER_DUMMY 9 |
34b41ace | 45 | #define EXTENT_BUFFER_IN_TREE 10 |
656f30db | 46 | #define EXTENT_BUFFER_WRITE_ERR 11 /* write IO error */ |
b4ce94de | 47 | |
a791e35e | 48 | /* these are flags for extent_clear_unlock_delalloc */ |
c2790a2e JB |
49 | #define PAGE_UNLOCK (1 << 0) |
50 | #define PAGE_CLEAR_DIRTY (1 << 1) | |
51 | #define PAGE_SET_WRITEBACK (1 << 2) | |
52 | #define PAGE_END_WRITEBACK (1 << 3) | |
53 | #define PAGE_SET_PRIVATE2 (1 << 4) | |
704de49d | 54 | #define PAGE_SET_ERROR (1 << 5) |
a791e35e | 55 | |
d1310b2e CM |
56 | /* |
57 | * page->private values. Every page that is controlled by the extent | |
58 | * map has page->private set to one. | |
59 | */ | |
60 | #define EXTENT_PAGE_PRIVATE 1 | |
d1310b2e | 61 | |
2fe1d551 OS |
62 | /* |
63 | * The extent buffer bitmap operations are done with byte granularity instead of | |
64 | * word granularity for two reasons: | |
65 | * 1. The bitmaps must be little-endian on disk. | |
66 | * 2. Bitmap items are not guaranteed to be aligned to a word and therefore a | |
67 | * single word in a bitmap may straddle two pages in the extent buffer. | |
68 | */ | |
69 | #define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE) | |
70 | #define BYTE_MASK ((1 << BITS_PER_BYTE) - 1) | |
71 | #define BITMAP_FIRST_BYTE_MASK(start) \ | |
72 | ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK) | |
73 | #define BITMAP_LAST_BYTE_MASK(nbits) \ | |
74 | (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1))) | |
75 | ||
76 | static inline int le_test_bit(int nr, const u8 *addr) | |
77 | { | |
78 | return 1U & (addr[BIT_BYTE(nr)] >> (nr & (BITS_PER_BYTE-1))); | |
79 | } | |
80 | ||
81 | extern void le_bitmap_set(u8 *map, unsigned int start, int len); | |
82 | extern void le_bitmap_clear(u8 *map, unsigned int start, int len); | |
83 | ||
70dec807 | 84 | struct extent_state; |
ea466794 | 85 | struct btrfs_root; |
facc8a22 | 86 | struct btrfs_io_bio; |
47dc196a | 87 | struct io_failure_record; |
70dec807 | 88 | |
81a75f67 MC |
89 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, struct bio *bio, |
90 | int mirror_num, unsigned long bio_flags, | |
91 | u64 bio_offset); | |
d1310b2e | 92 | struct extent_io_ops { |
c8b97818 | 93 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
94 | u64 start, u64 end, int *page_started, |
95 | unsigned long *nr_written); | |
247e743c | 96 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 97 | extent_submit_bio_hook_t *submit_bio_hook; |
81a75f67 | 98 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
99 | size_t size, struct bio *bio, |
100 | unsigned long bio_flags); | |
ea466794 | 101 | int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); |
facc8a22 MX |
102 | int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset, |
103 | struct page *page, u64 start, u64 end, | |
104 | int mirror); | |
1259ab75 | 105 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 106 | struct extent_state *state, int uptodate); |
1bf85046 | 107 | void (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
9ee49a04 | 108 | unsigned *bits); |
1bf85046 | 109 | void (*clear_bit_hook)(struct inode *inode, struct extent_state *state, |
9ee49a04 | 110 | unsigned *bits); |
1bf85046 JM |
111 | void (*merge_extent_hook)(struct inode *inode, |
112 | struct extent_state *new, | |
113 | struct extent_state *other); | |
114 | void (*split_extent_hook)(struct inode *inode, | |
115 | struct extent_state *orig, u64 split); | |
d1310b2e CM |
116 | }; |
117 | ||
118 | struct extent_io_tree { | |
119 | struct rb_root state; | |
120 | struct address_space *mapping; | |
121 | u64 dirty_bytes; | |
0b32f4bb | 122 | int track_uptodate; |
70dec807 | 123 | spinlock_t lock; |
e8c9f186 | 124 | const struct extent_io_ops *ops; |
d1310b2e CM |
125 | }; |
126 | ||
127 | struct extent_state { | |
128 | u64 start; | |
129 | u64 end; /* inclusive */ | |
d1310b2e | 130 | struct rb_node rb_node; |
9ed74f2d JB |
131 | |
132 | /* ADD NEW ELEMENTS AFTER THIS */ | |
d1310b2e CM |
133 | wait_queue_head_t wq; |
134 | atomic_t refs; | |
9ee49a04 | 135 | unsigned state; |
d1310b2e | 136 | |
47dc196a | 137 | struct io_failure_record *failrec; |
d1310b2e | 138 | |
6d49ba1b | 139 | #ifdef CONFIG_BTRFS_DEBUG |
2d2ae547 | 140 | struct list_head leak_list; |
6d49ba1b | 141 | #endif |
d1310b2e CM |
142 | }; |
143 | ||
727011e0 | 144 | #define INLINE_EXTENT_BUFFER_PAGES 16 |
09cbfeaf | 145 | #define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_SIZE) |
d1310b2e CM |
146 | struct extent_buffer { |
147 | u64 start; | |
148 | unsigned long len; | |
b4ce94de | 149 | unsigned long bflags; |
f28491e0 | 150 | struct btrfs_fs_info *fs_info; |
3083ee2e | 151 | spinlock_t refs_lock; |
727011e0 | 152 | atomic_t refs; |
0b32f4bb | 153 | atomic_t io_pages; |
5cf1ab56 | 154 | int read_mirror; |
19fe0a8b | 155 | struct rcu_head rcu_head; |
5b25f70f | 156 | pid_t lock_owner; |
b4ce94de | 157 | |
bd681513 CM |
158 | /* count of read lock holders on the extent buffer */ |
159 | atomic_t write_locks; | |
160 | atomic_t read_locks; | |
161 | atomic_t blocking_writers; | |
162 | atomic_t blocking_readers; | |
163 | atomic_t spinning_readers; | |
164 | atomic_t spinning_writers; | |
656f30db FM |
165 | short lock_nested; |
166 | /* >= 0 if eb belongs to a log tree, -1 otherwise */ | |
167 | short log_index; | |
bd681513 CM |
168 | |
169 | /* protects write locks */ | |
170 | rwlock_t lock; | |
171 | ||
172 | /* readers use lock_wq while they wait for the write | |
173 | * lock holders to unlock | |
174 | */ | |
175 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 176 | |
bd681513 CM |
177 | /* writers use read_lock_wq while they wait for readers |
178 | * to unlock | |
b4ce94de | 179 | */ |
bd681513 | 180 | wait_queue_head_t read_lock_wq; |
b8dae313 | 181 | struct page *pages[INLINE_EXTENT_BUFFER_PAGES]; |
6d49ba1b ES |
182 | #ifdef CONFIG_BTRFS_DEBUG |
183 | struct list_head leak_list; | |
184 | #endif | |
d1310b2e CM |
185 | }; |
186 | ||
ac467772 QW |
187 | /* |
188 | * Structure to record how many bytes and which ranges are set/cleared | |
189 | */ | |
190 | struct extent_changeset { | |
191 | /* How many bytes are set/cleared in this operation */ | |
192 | u64 bytes_changed; | |
193 | ||
194 | /* Changed ranges */ | |
195 | struct ulist *range_changed; | |
196 | }; | |
197 | ||
261507a0 LZ |
198 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
199 | int compress_type) | |
200 | { | |
201 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
202 | } | |
203 | ||
204 | static inline int extent_compress_type(unsigned long bio_flags) | |
205 | { | |
206 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
207 | } | |
208 | ||
d1310b2e CM |
209 | struct extent_map_tree; |
210 | ||
211 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
212 | struct page *page, | |
306e16ce | 213 | size_t pg_offset, |
d1310b2e CM |
214 | u64 start, u64 len, |
215 | int create); | |
216 | ||
217 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 218 | struct address_space *mapping); |
d1310b2e | 219 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
220 | struct extent_io_tree *tree, struct page *page, |
221 | gfp_t mask); | |
f7a52a40 | 222 | int try_release_extent_buffer(struct page *page); |
1edbb734 | 223 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
ff13db41 | 224 | struct extent_state **cached); |
cd716d8f DS |
225 | |
226 | static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) | |
227 | { | |
228 | return lock_extent_bits(tree, start, end, NULL); | |
229 | } | |
230 | ||
d0082371 | 231 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); |
d1310b2e | 232 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 233 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
234 | int __init extent_io_init(void); |
235 | void extent_io_exit(void); | |
236 | ||
237 | u64 count_range_bits(struct extent_io_tree *tree, | |
238 | u64 *start, u64 search_end, | |
9ee49a04 | 239 | u64 max_bytes, unsigned bits, int contig); |
d1310b2e | 240 | |
4845e44f | 241 | void free_extent_state(struct extent_state *state); |
d1310b2e | 242 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 243 | unsigned bits, int filled, |
41074888 | 244 | struct extent_state *cached_state); |
fefdc557 | 245 | int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
f734c44a | 246 | unsigned bits, struct extent_changeset *changeset); |
e6dcd2dc | 247 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 248 | unsigned bits, int wake, int delete, |
41074888 | 249 | struct extent_state **cached, gfp_t mask); |
c6317955 | 250 | |
e83b1d91 DS |
251 | static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) |
252 | { | |
253 | return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL, | |
254 | GFP_NOFS); | |
255 | } | |
256 | ||
257 | static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start, | |
258 | u64 end, struct extent_state **cached, gfp_t mask) | |
259 | { | |
260 | return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, | |
261 | mask); | |
262 | } | |
263 | ||
264 | static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start, | |
91166212 | 265 | u64 end, unsigned bits) |
e83b1d91 DS |
266 | { |
267 | int wake = 0; | |
268 | ||
269 | if (bits & EXTENT_LOCKED) | |
270 | wake = 1; | |
271 | ||
91166212 DS |
272 | return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, |
273 | GFP_NOFS); | |
e83b1d91 DS |
274 | } |
275 | ||
d38ed27f | 276 | int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c53b912 | 277 | unsigned bits, struct extent_changeset *changeset); |
4845e44f | 278 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 279 | unsigned bits, u64 *failed_start, |
4845e44f | 280 | struct extent_state **cached_state, gfp_t mask); |
c6317955 DS |
281 | |
282 | static inline int set_extent_bits(struct extent_io_tree *tree, u64 start, | |
ceeb0ae7 | 283 | u64 end, unsigned bits) |
c6317955 | 284 | { |
ceeb0ae7 | 285 | return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS); |
c6317955 DS |
286 | } |
287 | ||
e83b1d91 DS |
288 | static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, |
289 | u64 end, struct extent_state **cached_state, gfp_t mask) | |
290 | { | |
291 | return clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0, | |
292 | cached_state, mask); | |
293 | } | |
c6317955 DS |
294 | |
295 | static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start, | |
296 | u64 end, gfp_t mask) | |
297 | { | |
298 | return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, | |
299 | NULL, mask); | |
300 | } | |
301 | ||
e83b1d91 | 302 | static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start, |
af6f8f60 | 303 | u64 end) |
e83b1d91 DS |
304 | { |
305 | return clear_extent_bit(tree, start, end, | |
306 | EXTENT_DIRTY | EXTENT_DELALLOC | | |
af6f8f60 | 307 | EXTENT_DO_ACCOUNTING, 0, 0, NULL, GFP_NOFS); |
e83b1d91 DS |
308 | } |
309 | ||
462d6fac | 310 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 311 | unsigned bits, unsigned clear_bits, |
210aa277 | 312 | struct extent_state **cached_state); |
c6317955 DS |
313 | |
314 | static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start, | |
7cd8c752 | 315 | u64 end, struct extent_state **cached_state) |
c6317955 DS |
316 | { |
317 | return set_extent_bit(tree, start, end, | |
318 | EXTENT_DELALLOC | EXTENT_UPTODATE, | |
7cd8c752 | 319 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
320 | } |
321 | ||
322 | static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start, | |
018ed4f7 | 323 | u64 end, struct extent_state **cached_state) |
c6317955 DS |
324 | { |
325 | return set_extent_bit(tree, start, end, | |
326 | EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, | |
018ed4f7 | 327 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
328 | } |
329 | ||
330 | static inline int set_extent_new(struct extent_io_tree *tree, u64 start, | |
3744dbeb | 331 | u64 end) |
c6317955 | 332 | { |
3744dbeb DS |
333 | return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, |
334 | GFP_NOFS); | |
c6317955 DS |
335 | } |
336 | ||
337 | static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, | |
338 | u64 end, struct extent_state **cached_state, gfp_t mask) | |
339 | { | |
340 | return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL, | |
341 | cached_state, mask); | |
342 | } | |
343 | ||
d1310b2e | 344 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
9ee49a04 | 345 | u64 *start_ret, u64 *end_ret, unsigned bits, |
e6138876 | 346 | struct extent_state **cached_state); |
d1310b2e CM |
347 | int extent_invalidatepage(struct extent_io_tree *tree, |
348 | struct page *page, unsigned long offset); | |
349 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
350 | get_extent_t *get_extent, | |
351 | struct writeback_control *wbc); | |
771ed689 CM |
352 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
353 | u64 start, u64 end, get_extent_t *get_extent, | |
354 | int mode); | |
d1310b2e CM |
355 | int extent_writepages(struct extent_io_tree *tree, |
356 | struct address_space *mapping, | |
357 | get_extent_t *get_extent, | |
358 | struct writeback_control *wbc); | |
0b32f4bb JB |
359 | int btree_write_cache_pages(struct address_space *mapping, |
360 | struct writeback_control *wbc); | |
d1310b2e CM |
361 | int extent_readpages(struct extent_io_tree *tree, |
362 | struct address_space *mapping, | |
363 | struct list_head *pages, unsigned nr_pages, | |
364 | get_extent_t get_extent); | |
1506fcc8 YS |
365 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
366 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
367 | void set_page_extent_mapped(struct page *page); |
368 | ||
f28491e0 | 369 | struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, |
ce3e6984 | 370 | u64 start); |
0f331229 OS |
371 | struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
372 | u64 start, unsigned long len); | |
3f556f78 | 373 | struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
b9ef22de | 374 | u64 start, u32 nodesize); |
815a51c7 | 375 | struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src); |
f28491e0 | 376 | struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info, |
452c75c3 | 377 | u64 start); |
d1310b2e | 378 | void free_extent_buffer(struct extent_buffer *eb); |
3083ee2e | 379 | void free_extent_buffer_stale(struct extent_buffer *eb); |
bb82ab88 AJ |
380 | #define WAIT_NONE 0 |
381 | #define WAIT_COMPLETE 1 | |
382 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 383 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
8436ea91 | 384 | struct extent_buffer *eb, int wait, |
f188591e | 385 | get_extent_t *get_extent, int mirror_num); |
fd8b2b61 | 386 | void wait_on_extent_buffer_writeback(struct extent_buffer *eb); |
479ed9ab RD |
387 | |
388 | static inline unsigned long num_extent_pages(u64 start, u64 len) | |
389 | { | |
09cbfeaf KS |
390 | return ((start + len + PAGE_SIZE - 1) >> PAGE_SHIFT) - |
391 | (start >> PAGE_SHIFT); | |
479ed9ab RD |
392 | } |
393 | ||
d1310b2e CM |
394 | static inline void extent_buffer_get(struct extent_buffer *eb) |
395 | { | |
396 | atomic_inc(&eb->refs); | |
397 | } | |
398 | ||
399 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
400 | unsigned long start, | |
401 | unsigned long len); | |
402 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
403 | unsigned long start, | |
404 | unsigned long len); | |
550ac1d8 GH |
405 | int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst, |
406 | unsigned long start, | |
407 | unsigned long len); | |
f157bf76 DS |
408 | void write_extent_buffer_fsid(struct extent_buffer *eb, const void *src); |
409 | void write_extent_buffer_chunk_tree_uuid(struct extent_buffer *eb, | |
410 | const void *src); | |
d1310b2e CM |
411 | void write_extent_buffer(struct extent_buffer *eb, const void *src, |
412 | unsigned long start, unsigned long len); | |
413 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
414 | unsigned long dst_offset, unsigned long src_offset, | |
415 | unsigned long len); | |
416 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
417 | unsigned long src_offset, unsigned long len); | |
418 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
419 | unsigned long src_offset, unsigned long len); | |
420 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
421 | unsigned long start, unsigned long len); | |
3e1e8bb7 OS |
422 | int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start, |
423 | unsigned long pos); | |
424 | void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start, | |
425 | unsigned long pos, unsigned long len); | |
426 | void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start, | |
427 | unsigned long pos, unsigned long len); | |
1d4284bd | 428 | void clear_extent_buffer_dirty(struct extent_buffer *eb); |
0b32f4bb | 429 | int set_extent_buffer_dirty(struct extent_buffer *eb); |
09c25a8c | 430 | void set_extent_buffer_uptodate(struct extent_buffer *eb); |
69ba3927 | 431 | void clear_extent_buffer_uptodate(struct extent_buffer *eb); |
0b32f4bb | 432 | int extent_buffer_uptodate(struct extent_buffer *eb); |
a26e8c9f | 433 | int extent_buffer_under_io(struct extent_buffer *eb); |
d1310b2e | 434 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 435 | unsigned long min_len, char **map, |
d1310b2e | 436 | unsigned long *map_start, |
a6591715 | 437 | unsigned long *map_len); |
bd1fa4f0 | 438 | void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end); |
f6311572 | 439 | void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end); |
a9d93e17 | 440 | void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end, |
ba8b04c1 | 441 | u64 delalloc_end, struct page *locked_page, |
9ee49a04 | 442 | unsigned bits_to_clear, |
c2790a2e | 443 | unsigned long page_ops); |
88f794ed MX |
444 | struct bio * |
445 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
446 | gfp_t gfp_flags); | |
9be3395b CM |
447 | struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs); |
448 | struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask); | |
4a54c8c1 | 449 | |
3ec706c8 | 450 | struct btrfs_fs_info; |
4a54c8c1 | 451 | |
1203b681 MX |
452 | int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical, |
453 | struct page *page, unsigned int pg_offset, | |
454 | int mirror_num); | |
8b110e39 MX |
455 | int clean_io_failure(struct inode *inode, u64 start, struct page *page, |
456 | unsigned int pg_offset); | |
b5227c07 | 457 | void end_extent_writepage(struct page *page, int err, u64 start, u64 end); |
ea466794 JB |
458 | int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb, |
459 | int mirror_num); | |
2fe6303e MX |
460 | |
461 | /* | |
462 | * When IO fails, either with EIO or csum verification fails, we | |
463 | * try other mirrors that might have a good copy of the data. This | |
464 | * io_failure_record is used to record state as we go through all the | |
465 | * mirrors. If another mirror has good data, the page is set up to date | |
466 | * and things continue. If a good mirror can't be found, the original | |
467 | * bio end_io callback is called to indicate things have failed. | |
468 | */ | |
469 | struct io_failure_record { | |
470 | struct page *page; | |
471 | u64 start; | |
472 | u64 len; | |
473 | u64 logical; | |
474 | unsigned long bio_flags; | |
475 | int this_mirror; | |
476 | int failed_mirror; | |
477 | int in_validation; | |
478 | }; | |
479 | ||
f612496b | 480 | void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end); |
2fe6303e MX |
481 | int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, |
482 | struct io_failure_record **failrec_ret); | |
483 | int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio, | |
484 | struct io_failure_record *failrec, int fail_mirror); | |
485 | struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio, | |
486 | struct io_failure_record *failrec, | |
487 | struct page *page, int pg_offset, int icsum, | |
8b110e39 MX |
488 | bio_end_io_t *endio_func, void *data); |
489 | int free_io_failure(struct inode *inode, struct io_failure_record *rec); | |
294e30fe JB |
490 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
491 | noinline u64 find_lock_delalloc_range(struct inode *inode, | |
492 | struct extent_io_tree *tree, | |
493 | struct page *locked_page, u64 *start, | |
494 | u64 *end, u64 max_bytes); | |
0d4cf4e6 | 495 | #endif |
faa2dbf0 | 496 | struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info, |
b9ef22de | 497 | u64 start, u32 nodesize); |
294e30fe | 498 | #endif |