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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 | |
da2c7009 | 48 | /* these are flags for __process_pages_contig */ |
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) |
da2c7009 | 55 | #define PAGE_LOCK (1 << 6) |
a791e35e | 56 | |
d1310b2e CM |
57 | /* |
58 | * page->private values. Every page that is controlled by the extent | |
59 | * map has page->private set to one. | |
60 | */ | |
61 | #define EXTENT_PAGE_PRIVATE 1 | |
d1310b2e | 62 | |
2fe1d551 OS |
63 | /* |
64 | * The extent buffer bitmap operations are done with byte granularity instead of | |
65 | * word granularity for two reasons: | |
66 | * 1. The bitmaps must be little-endian on disk. | |
67 | * 2. Bitmap items are not guaranteed to be aligned to a word and therefore a | |
68 | * single word in a bitmap may straddle two pages in the extent buffer. | |
69 | */ | |
70 | #define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE) | |
71 | #define BYTE_MASK ((1 << BITS_PER_BYTE) - 1) | |
72 | #define BITMAP_FIRST_BYTE_MASK(start) \ | |
73 | ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK) | |
74 | #define BITMAP_LAST_BYTE_MASK(nbits) \ | |
75 | (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1))) | |
76 | ||
77 | static inline int le_test_bit(int nr, const u8 *addr) | |
78 | { | |
79 | return 1U & (addr[BIT_BYTE(nr)] >> (nr & (BITS_PER_BYTE-1))); | |
80 | } | |
81 | ||
82 | extern void le_bitmap_set(u8 *map, unsigned int start, int len); | |
83 | extern void le_bitmap_clear(u8 *map, unsigned int start, int len); | |
84 | ||
70dec807 | 85 | struct extent_state; |
ea466794 | 86 | struct btrfs_root; |
facc8a22 | 87 | struct btrfs_io_bio; |
47dc196a | 88 | struct io_failure_record; |
70dec807 | 89 | |
81a75f67 MC |
90 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, struct bio *bio, |
91 | int mirror_num, unsigned long bio_flags, | |
92 | u64 bio_offset); | |
d1310b2e | 93 | struct extent_io_ops { |
c8b97818 | 94 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
95 | u64 start, u64 end, int *page_started, |
96 | unsigned long *nr_written); | |
247e743c | 97 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 98 | extent_submit_bio_hook_t *submit_bio_hook; |
81a75f67 | 99 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
100 | size_t size, struct bio *bio, |
101 | unsigned long bio_flags); | |
ea466794 | 102 | int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); |
facc8a22 MX |
103 | int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset, |
104 | struct page *page, u64 start, u64 end, | |
105 | int mirror); | |
1259ab75 | 106 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 107 | struct extent_state *state, int uptodate); |
1bf85046 | 108 | void (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
9ee49a04 | 109 | unsigned *bits); |
1bf85046 | 110 | void (*clear_bit_hook)(struct inode *inode, struct extent_state *state, |
9ee49a04 | 111 | unsigned *bits); |
1bf85046 JM |
112 | void (*merge_extent_hook)(struct inode *inode, |
113 | struct extent_state *new, | |
114 | struct extent_state *other); | |
115 | void (*split_extent_hook)(struct inode *inode, | |
116 | struct extent_state *orig, u64 split); | |
d1310b2e CM |
117 | }; |
118 | ||
119 | struct extent_io_tree { | |
120 | struct rb_root state; | |
121 | struct address_space *mapping; | |
122 | u64 dirty_bytes; | |
0b32f4bb | 123 | int track_uptodate; |
70dec807 | 124 | spinlock_t lock; |
e8c9f186 | 125 | const struct extent_io_ops *ops; |
d1310b2e CM |
126 | }; |
127 | ||
128 | struct extent_state { | |
129 | u64 start; | |
130 | u64 end; /* inclusive */ | |
d1310b2e | 131 | struct rb_node rb_node; |
9ed74f2d JB |
132 | |
133 | /* ADD NEW ELEMENTS AFTER THIS */ | |
d1310b2e CM |
134 | wait_queue_head_t wq; |
135 | atomic_t refs; | |
9ee49a04 | 136 | unsigned state; |
d1310b2e | 137 | |
47dc196a | 138 | struct io_failure_record *failrec; |
d1310b2e | 139 | |
6d49ba1b | 140 | #ifdef CONFIG_BTRFS_DEBUG |
2d2ae547 | 141 | struct list_head leak_list; |
6d49ba1b | 142 | #endif |
d1310b2e CM |
143 | }; |
144 | ||
727011e0 | 145 | #define INLINE_EXTENT_BUFFER_PAGES 16 |
09cbfeaf | 146 | #define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_SIZE) |
d1310b2e CM |
147 | struct extent_buffer { |
148 | u64 start; | |
149 | unsigned long len; | |
b4ce94de | 150 | unsigned long bflags; |
f28491e0 | 151 | struct btrfs_fs_info *fs_info; |
3083ee2e | 152 | spinlock_t refs_lock; |
727011e0 | 153 | atomic_t refs; |
0b32f4bb | 154 | atomic_t io_pages; |
5cf1ab56 | 155 | int read_mirror; |
19fe0a8b | 156 | struct rcu_head rcu_head; |
5b25f70f | 157 | pid_t lock_owner; |
b4ce94de | 158 | |
bd681513 CM |
159 | /* count of read lock holders on the extent buffer */ |
160 | atomic_t write_locks; | |
161 | atomic_t read_locks; | |
162 | atomic_t blocking_writers; | |
163 | atomic_t blocking_readers; | |
164 | atomic_t spinning_readers; | |
165 | atomic_t spinning_writers; | |
656f30db FM |
166 | short lock_nested; |
167 | /* >= 0 if eb belongs to a log tree, -1 otherwise */ | |
168 | short log_index; | |
bd681513 CM |
169 | |
170 | /* protects write locks */ | |
171 | rwlock_t lock; | |
172 | ||
173 | /* readers use lock_wq while they wait for the write | |
174 | * lock holders to unlock | |
175 | */ | |
176 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 177 | |
bd681513 CM |
178 | /* writers use read_lock_wq while they wait for readers |
179 | * to unlock | |
b4ce94de | 180 | */ |
bd681513 | 181 | wait_queue_head_t read_lock_wq; |
b8dae313 | 182 | struct page *pages[INLINE_EXTENT_BUFFER_PAGES]; |
6d49ba1b ES |
183 | #ifdef CONFIG_BTRFS_DEBUG |
184 | struct list_head leak_list; | |
185 | #endif | |
d1310b2e CM |
186 | }; |
187 | ||
ac467772 QW |
188 | /* |
189 | * Structure to record how many bytes and which ranges are set/cleared | |
190 | */ | |
191 | struct extent_changeset { | |
192 | /* How many bytes are set/cleared in this operation */ | |
193 | u64 bytes_changed; | |
194 | ||
195 | /* Changed ranges */ | |
53d32359 | 196 | struct ulist range_changed; |
ac467772 QW |
197 | }; |
198 | ||
261507a0 LZ |
199 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
200 | int compress_type) | |
201 | { | |
202 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
203 | } | |
204 | ||
205 | static inline int extent_compress_type(unsigned long bio_flags) | |
206 | { | |
207 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
208 | } | |
209 | ||
d1310b2e CM |
210 | struct extent_map_tree; |
211 | ||
212 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
213 | struct page *page, | |
306e16ce | 214 | size_t pg_offset, |
d1310b2e CM |
215 | u64 start, u64 len, |
216 | int create); | |
217 | ||
218 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 219 | struct address_space *mapping); |
d1310b2e | 220 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
221 | struct extent_io_tree *tree, struct page *page, |
222 | gfp_t mask); | |
f7a52a40 | 223 | int try_release_extent_buffer(struct page *page); |
1edbb734 | 224 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
ff13db41 | 225 | struct extent_state **cached); |
cd716d8f DS |
226 | |
227 | static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) | |
228 | { | |
229 | return lock_extent_bits(tree, start, end, NULL); | |
230 | } | |
231 | ||
d0082371 | 232 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); |
d1310b2e | 233 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 234 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
235 | int __init extent_io_init(void); |
236 | void extent_io_exit(void); | |
237 | ||
238 | u64 count_range_bits(struct extent_io_tree *tree, | |
239 | u64 *start, u64 search_end, | |
9ee49a04 | 240 | u64 max_bytes, unsigned bits, int contig); |
d1310b2e | 241 | |
4845e44f | 242 | void free_extent_state(struct extent_state *state); |
d1310b2e | 243 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 244 | unsigned bits, int filled, |
41074888 | 245 | struct extent_state *cached_state); |
fefdc557 | 246 | int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
f734c44a | 247 | unsigned bits, struct extent_changeset *changeset); |
e6dcd2dc | 248 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 249 | unsigned bits, int wake, int delete, |
41074888 | 250 | struct extent_state **cached, gfp_t mask); |
c6317955 | 251 | |
e83b1d91 DS |
252 | static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) |
253 | { | |
254 | return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL, | |
255 | GFP_NOFS); | |
256 | } | |
257 | ||
258 | static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start, | |
259 | u64 end, struct extent_state **cached, gfp_t mask) | |
260 | { | |
261 | return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, | |
262 | mask); | |
263 | } | |
264 | ||
265 | static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start, | |
91166212 | 266 | u64 end, unsigned bits) |
e83b1d91 DS |
267 | { |
268 | int wake = 0; | |
269 | ||
270 | if (bits & EXTENT_LOCKED) | |
271 | wake = 1; | |
272 | ||
91166212 DS |
273 | return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, |
274 | GFP_NOFS); | |
e83b1d91 DS |
275 | } |
276 | ||
d38ed27f | 277 | int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c53b912 | 278 | unsigned bits, struct extent_changeset *changeset); |
4845e44f | 279 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 280 | unsigned bits, u64 *failed_start, |
4845e44f | 281 | struct extent_state **cached_state, gfp_t mask); |
c6317955 DS |
282 | |
283 | static inline int set_extent_bits(struct extent_io_tree *tree, u64 start, | |
ceeb0ae7 | 284 | u64 end, unsigned bits) |
c6317955 | 285 | { |
ceeb0ae7 | 286 | return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS); |
c6317955 DS |
287 | } |
288 | ||
e83b1d91 DS |
289 | static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, |
290 | u64 end, struct extent_state **cached_state, gfp_t mask) | |
291 | { | |
292 | return clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0, | |
293 | cached_state, mask); | |
294 | } | |
c6317955 DS |
295 | |
296 | static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start, | |
297 | u64 end, gfp_t mask) | |
298 | { | |
299 | return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, | |
300 | NULL, mask); | |
301 | } | |
302 | ||
e83b1d91 | 303 | static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start, |
af6f8f60 | 304 | u64 end) |
e83b1d91 DS |
305 | { |
306 | return clear_extent_bit(tree, start, end, | |
307 | EXTENT_DIRTY | EXTENT_DELALLOC | | |
af6f8f60 | 308 | EXTENT_DO_ACCOUNTING, 0, 0, NULL, GFP_NOFS); |
e83b1d91 DS |
309 | } |
310 | ||
462d6fac | 311 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 312 | unsigned bits, unsigned clear_bits, |
210aa277 | 313 | struct extent_state **cached_state); |
c6317955 DS |
314 | |
315 | static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start, | |
7cd8c752 | 316 | u64 end, struct extent_state **cached_state) |
c6317955 DS |
317 | { |
318 | return set_extent_bit(tree, start, end, | |
319 | EXTENT_DELALLOC | EXTENT_UPTODATE, | |
7cd8c752 | 320 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
321 | } |
322 | ||
323 | static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start, | |
018ed4f7 | 324 | u64 end, struct extent_state **cached_state) |
c6317955 DS |
325 | { |
326 | return set_extent_bit(tree, start, end, | |
327 | EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, | |
018ed4f7 | 328 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
329 | } |
330 | ||
331 | static inline int set_extent_new(struct extent_io_tree *tree, u64 start, | |
3744dbeb | 332 | u64 end) |
c6317955 | 333 | { |
3744dbeb DS |
334 | return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, |
335 | GFP_NOFS); | |
c6317955 DS |
336 | } |
337 | ||
338 | static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, | |
339 | u64 end, struct extent_state **cached_state, gfp_t mask) | |
340 | { | |
341 | return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL, | |
342 | cached_state, mask); | |
343 | } | |
344 | ||
d1310b2e | 345 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
9ee49a04 | 346 | u64 *start_ret, u64 *end_ret, unsigned bits, |
e6138876 | 347 | struct extent_state **cached_state); |
d1310b2e CM |
348 | int extent_invalidatepage(struct extent_io_tree *tree, |
349 | struct page *page, unsigned long offset); | |
350 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
351 | get_extent_t *get_extent, | |
352 | struct writeback_control *wbc); | |
771ed689 CM |
353 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
354 | u64 start, u64 end, get_extent_t *get_extent, | |
355 | int mode); | |
d1310b2e CM |
356 | int extent_writepages(struct extent_io_tree *tree, |
357 | struct address_space *mapping, | |
358 | get_extent_t *get_extent, | |
359 | struct writeback_control *wbc); | |
0b32f4bb JB |
360 | int btree_write_cache_pages(struct address_space *mapping, |
361 | struct writeback_control *wbc); | |
d1310b2e CM |
362 | int extent_readpages(struct extent_io_tree *tree, |
363 | struct address_space *mapping, | |
364 | struct list_head *pages, unsigned nr_pages, | |
365 | get_extent_t get_extent); | |
1506fcc8 YS |
366 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
367 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
368 | void set_page_extent_mapped(struct page *page); |
369 | ||
f28491e0 | 370 | struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, |
ce3e6984 | 371 | u64 start); |
0f331229 OS |
372 | struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
373 | u64 start, unsigned long len); | |
3f556f78 | 374 | struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
da17066c | 375 | u64 start); |
815a51c7 | 376 | struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src); |
f28491e0 | 377 | struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info, |
452c75c3 | 378 | u64 start); |
d1310b2e | 379 | void free_extent_buffer(struct extent_buffer *eb); |
3083ee2e | 380 | void free_extent_buffer_stale(struct extent_buffer *eb); |
bb82ab88 AJ |
381 | #define WAIT_NONE 0 |
382 | #define WAIT_COMPLETE 1 | |
383 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 384 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
8436ea91 | 385 | struct extent_buffer *eb, int wait, |
f188591e | 386 | get_extent_t *get_extent, int mirror_num); |
fd8b2b61 | 387 | void wait_on_extent_buffer_writeback(struct extent_buffer *eb); |
479ed9ab RD |
388 | |
389 | static inline unsigned long num_extent_pages(u64 start, u64 len) | |
390 | { | |
09cbfeaf KS |
391 | return ((start + len + PAGE_SIZE - 1) >> PAGE_SHIFT) - |
392 | (start >> PAGE_SHIFT); | |
479ed9ab RD |
393 | } |
394 | ||
d1310b2e CM |
395 | static inline void extent_buffer_get(struct extent_buffer *eb) |
396 | { | |
397 | atomic_inc(&eb->refs); | |
398 | } | |
399 | ||
400 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
401 | unsigned long start, | |
402 | unsigned long len); | |
403 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
404 | unsigned long start, | |
405 | unsigned long len); | |
550ac1d8 GH |
406 | int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst, |
407 | unsigned long start, | |
408 | unsigned long len); | |
f157bf76 DS |
409 | void write_extent_buffer_fsid(struct extent_buffer *eb, const void *src); |
410 | void write_extent_buffer_chunk_tree_uuid(struct extent_buffer *eb, | |
411 | const void *src); | |
d1310b2e CM |
412 | void write_extent_buffer(struct extent_buffer *eb, const void *src, |
413 | unsigned long start, unsigned long len); | |
58e8012c DS |
414 | void copy_extent_buffer_full(struct extent_buffer *dst, |
415 | struct extent_buffer *src); | |
d1310b2e CM |
416 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, |
417 | unsigned long dst_offset, unsigned long src_offset, | |
418 | unsigned long len); | |
419 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
420 | unsigned long src_offset, unsigned long len); | |
421 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
422 | unsigned long src_offset, unsigned long len); | |
b159fa28 DS |
423 | void memzero_extent_buffer(struct extent_buffer *eb, unsigned long start, |
424 | unsigned long len); | |
3e1e8bb7 OS |
425 | int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start, |
426 | unsigned long pos); | |
427 | void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start, | |
428 | unsigned long pos, unsigned long len); | |
429 | void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start, | |
430 | unsigned long pos, unsigned long len); | |
1d4284bd | 431 | void clear_extent_buffer_dirty(struct extent_buffer *eb); |
0b32f4bb | 432 | int set_extent_buffer_dirty(struct extent_buffer *eb); |
09c25a8c | 433 | void set_extent_buffer_uptodate(struct extent_buffer *eb); |
69ba3927 | 434 | void clear_extent_buffer_uptodate(struct extent_buffer *eb); |
0b32f4bb | 435 | int extent_buffer_uptodate(struct extent_buffer *eb); |
a26e8c9f | 436 | int extent_buffer_under_io(struct extent_buffer *eb); |
d1310b2e | 437 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 438 | unsigned long min_len, char **map, |
d1310b2e | 439 | unsigned long *map_start, |
a6591715 | 440 | unsigned long *map_len); |
bd1fa4f0 | 441 | void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end); |
f6311572 | 442 | void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end); |
a9d93e17 | 443 | void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end, |
ba8b04c1 | 444 | u64 delalloc_end, struct page *locked_page, |
9ee49a04 | 445 | unsigned bits_to_clear, |
c2790a2e | 446 | unsigned long page_ops); |
88f794ed MX |
447 | struct bio * |
448 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
449 | gfp_t gfp_flags); | |
9be3395b CM |
450 | struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs); |
451 | struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask); | |
4a54c8c1 | 452 | |
3ec706c8 | 453 | struct btrfs_fs_info; |
4a54c8c1 | 454 | |
1203b681 MX |
455 | int repair_io_failure(struct inode *inode, u64 start, u64 length, u64 logical, |
456 | struct page *page, unsigned int pg_offset, | |
457 | int mirror_num); | |
8b110e39 MX |
458 | int clean_io_failure(struct inode *inode, u64 start, struct page *page, |
459 | unsigned int pg_offset); | |
b5227c07 | 460 | void end_extent_writepage(struct page *page, int err, u64 start, u64 end); |
2ff7e61e JM |
461 | int repair_eb_io_failure(struct btrfs_fs_info *fs_info, |
462 | struct extent_buffer *eb, int mirror_num); | |
2fe6303e MX |
463 | |
464 | /* | |
465 | * When IO fails, either with EIO or csum verification fails, we | |
466 | * try other mirrors that might have a good copy of the data. This | |
467 | * io_failure_record is used to record state as we go through all the | |
468 | * mirrors. If another mirror has good data, the page is set up to date | |
469 | * and things continue. If a good mirror can't be found, the original | |
470 | * bio end_io callback is called to indicate things have failed. | |
471 | */ | |
472 | struct io_failure_record { | |
473 | struct page *page; | |
474 | u64 start; | |
475 | u64 len; | |
476 | u64 logical; | |
477 | unsigned long bio_flags; | |
478 | int this_mirror; | |
479 | int failed_mirror; | |
480 | int in_validation; | |
481 | }; | |
482 | ||
4ac1f4ac NB |
483 | struct btrfs_inode; |
484 | ||
f612496b | 485 | void btrfs_free_io_failure_record(struct inode *inode, u64 start, u64 end); |
2fe6303e MX |
486 | int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, |
487 | struct io_failure_record **failrec_ret); | |
488 | int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio, | |
489 | struct io_failure_record *failrec, int fail_mirror); | |
490 | struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio, | |
491 | struct io_failure_record *failrec, | |
492 | struct page *page, int pg_offset, int icsum, | |
8b110e39 | 493 | bio_end_io_t *endio_func, void *data); |
4ac1f4ac | 494 | int free_io_failure(struct btrfs_inode *inode, struct io_failure_record *rec); |
294e30fe JB |
495 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
496 | noinline u64 find_lock_delalloc_range(struct inode *inode, | |
497 | struct extent_io_tree *tree, | |
498 | struct page *locked_page, u64 *start, | |
499 | u64 *end, u64 max_bytes); | |
0d4cf4e6 | 500 | #endif |
faa2dbf0 | 501 | struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info, |
da17066c | 502 | u64 start); |
294e30fe | 503 | #endif |