Commit | Line | Data |
---|---|---|
d1310b2e CM |
1 | #ifndef __EXTENTIO__ |
2 | #define __EXTENTIO__ | |
3 | ||
4 | #include <linux/rbtree.h> | |
b7ac31b7 | 5 | #include <linux/refcount.h> |
ac467772 | 6 | #include "ulist.h" |
d1310b2e CM |
7 | |
8 | /* bits for the extent state */ | |
9ee49a04 DS |
9 | #define EXTENT_DIRTY (1U << 0) |
10 | #define EXTENT_WRITEBACK (1U << 1) | |
11 | #define EXTENT_UPTODATE (1U << 2) | |
12 | #define EXTENT_LOCKED (1U << 3) | |
13 | #define EXTENT_NEW (1U << 4) | |
14 | #define EXTENT_DELALLOC (1U << 5) | |
15 | #define EXTENT_DEFRAG (1U << 6) | |
16 | #define EXTENT_BOUNDARY (1U << 9) | |
17 | #define EXTENT_NODATASUM (1U << 10) | |
a315e68f | 18 | #define EXTENT_CLEAR_META_RESV (1U << 11) |
9ee49a04 DS |
19 | #define EXTENT_FIRST_DELALLOC (1U << 12) |
20 | #define EXTENT_NEED_WAIT (1U << 13) | |
21 | #define EXTENT_DAMAGED (1U << 14) | |
22 | #define EXTENT_NORESERVE (1U << 15) | |
52472553 | 23 | #define EXTENT_QGROUP_RESERVED (1U << 16) |
18513091 | 24 | #define EXTENT_CLEAR_DATA_RESV (1U << 17) |
a7e3b975 | 25 | #define EXTENT_DELALLOC_NEW (1U << 18) |
9ee49a04 | 26 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
a315e68f FM |
27 | #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \ |
28 | EXTENT_CLEAR_DATA_RESV) | |
9ee49a04 | 29 | #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC) |
d1310b2e | 30 | |
261507a0 LZ |
31 | /* |
32 | * flags for bio submission. The high bits indicate the compression | |
33 | * type for this bio | |
34 | */ | |
c8b97818 | 35 | #define EXTENT_BIO_COMPRESSED 1 |
de0022b9 | 36 | #define EXTENT_BIO_TREE_LOG 2 |
261507a0 | 37 | #define EXTENT_BIO_FLAG_SHIFT 16 |
c8b97818 | 38 | |
b4ce94de CM |
39 | /* these are bit numbers for test/set bit */ |
40 | #define EXTENT_BUFFER_UPTODATE 0 | |
b9473439 | 41 | #define EXTENT_BUFFER_DIRTY 2 |
a826d6dc | 42 | #define EXTENT_BUFFER_CORRUPT 3 |
ab0fff03 | 43 | #define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */ |
3083ee2e JB |
44 | #define EXTENT_BUFFER_TREE_REF 5 |
45 | #define EXTENT_BUFFER_STALE 6 | |
0b32f4bb | 46 | #define EXTENT_BUFFER_WRITEBACK 7 |
656f30db | 47 | #define EXTENT_BUFFER_READ_ERR 8 /* read IO error */ |
815a51c7 | 48 | #define EXTENT_BUFFER_DUMMY 9 |
34b41ace | 49 | #define EXTENT_BUFFER_IN_TREE 10 |
656f30db | 50 | #define EXTENT_BUFFER_WRITE_ERR 11 /* write IO error */ |
b4ce94de | 51 | |
da2c7009 | 52 | /* these are flags for __process_pages_contig */ |
c2790a2e JB |
53 | #define PAGE_UNLOCK (1 << 0) |
54 | #define PAGE_CLEAR_DIRTY (1 << 1) | |
55 | #define PAGE_SET_WRITEBACK (1 << 2) | |
56 | #define PAGE_END_WRITEBACK (1 << 3) | |
57 | #define PAGE_SET_PRIVATE2 (1 << 4) | |
704de49d | 58 | #define PAGE_SET_ERROR (1 << 5) |
da2c7009 | 59 | #define PAGE_LOCK (1 << 6) |
a791e35e | 60 | |
d1310b2e CM |
61 | /* |
62 | * page->private values. Every page that is controlled by the extent | |
63 | * map has page->private set to one. | |
64 | */ | |
65 | #define EXTENT_PAGE_PRIVATE 1 | |
d1310b2e | 66 | |
2fe1d551 OS |
67 | /* |
68 | * The extent buffer bitmap operations are done with byte granularity instead of | |
69 | * word granularity for two reasons: | |
70 | * 1. The bitmaps must be little-endian on disk. | |
71 | * 2. Bitmap items are not guaranteed to be aligned to a word and therefore a | |
72 | * single word in a bitmap may straddle two pages in the extent buffer. | |
73 | */ | |
74 | #define BIT_BYTE(nr) ((nr) / BITS_PER_BYTE) | |
75 | #define BYTE_MASK ((1 << BITS_PER_BYTE) - 1) | |
76 | #define BITMAP_FIRST_BYTE_MASK(start) \ | |
77 | ((BYTE_MASK << ((start) & (BITS_PER_BYTE - 1))) & BYTE_MASK) | |
78 | #define BITMAP_LAST_BYTE_MASK(nbits) \ | |
79 | (BYTE_MASK >> (-(nbits) & (BITS_PER_BYTE - 1))) | |
80 | ||
81 | static inline int le_test_bit(int nr, const u8 *addr) | |
82 | { | |
83 | return 1U & (addr[BIT_BYTE(nr)] >> (nr & (BITS_PER_BYTE-1))); | |
84 | } | |
85 | ||
86 | extern void le_bitmap_set(u8 *map, unsigned int start, int len); | |
87 | extern void le_bitmap_clear(u8 *map, unsigned int start, int len); | |
88 | ||
70dec807 | 89 | struct extent_state; |
ea466794 | 90 | struct btrfs_root; |
6fc0ef68 | 91 | struct btrfs_inode; |
facc8a22 | 92 | struct btrfs_io_bio; |
47dc196a | 93 | struct io_failure_record; |
70dec807 | 94 | |
4e4cbee9 CH |
95 | typedef blk_status_t (extent_submit_bio_hook_t)(struct inode *inode, |
96 | struct bio *bio, int mirror_num, unsigned long bio_flags, | |
97 | u64 bio_offset); | |
d1310b2e | 98 | struct extent_io_ops { |
4d53dddb DS |
99 | /* |
100 | * The following callbacks must be allways defined, the function | |
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); | |
81a75f67 | 107 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
108 | size_t size, struct bio *bio, |
109 | unsigned long bio_flags); | |
20a7db8a | 110 | int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); |
4d53dddb DS |
111 | |
112 | /* | |
113 | * Optional hooks, called if the pointer is not NULL | |
114 | */ | |
115 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, | |
116 | u64 start, u64 end, int *page_started, | |
117 | unsigned long *nr_written); | |
4d53dddb DS |
118 | |
119 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); | |
c3988d63 | 120 | void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 121 | struct extent_state *state, int uptodate); |
1bf85046 | 122 | void (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
9ee49a04 | 123 | unsigned *bits); |
6fc0ef68 NB |
124 | void (*clear_bit_hook)(struct btrfs_inode *inode, |
125 | struct extent_state *state, | |
126 | unsigned *bits); | |
1bf85046 JM |
127 | void (*merge_extent_hook)(struct inode *inode, |
128 | struct extent_state *new, | |
129 | struct extent_state *other); | |
130 | void (*split_extent_hook)(struct inode *inode, | |
131 | struct extent_state *orig, u64 split); | |
d1310b2e CM |
132 | }; |
133 | ||
134 | struct extent_io_tree { | |
135 | struct rb_root state; | |
136 | struct address_space *mapping; | |
137 | u64 dirty_bytes; | |
0b32f4bb | 138 | int track_uptodate; |
70dec807 | 139 | spinlock_t lock; |
e8c9f186 | 140 | const struct extent_io_ops *ops; |
d1310b2e CM |
141 | }; |
142 | ||
143 | struct extent_state { | |
144 | u64 start; | |
145 | u64 end; /* inclusive */ | |
d1310b2e | 146 | struct rb_node rb_node; |
9ed74f2d JB |
147 | |
148 | /* ADD NEW ELEMENTS AFTER THIS */ | |
d1310b2e | 149 | wait_queue_head_t wq; |
b7ac31b7 | 150 | refcount_t refs; |
9ee49a04 | 151 | unsigned state; |
d1310b2e | 152 | |
47dc196a | 153 | struct io_failure_record *failrec; |
d1310b2e | 154 | |
6d49ba1b | 155 | #ifdef CONFIG_BTRFS_DEBUG |
2d2ae547 | 156 | struct list_head leak_list; |
6d49ba1b | 157 | #endif |
d1310b2e CM |
158 | }; |
159 | ||
727011e0 | 160 | #define INLINE_EXTENT_BUFFER_PAGES 16 |
09cbfeaf | 161 | #define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_SIZE) |
d1310b2e CM |
162 | struct extent_buffer { |
163 | u64 start; | |
164 | unsigned long len; | |
b4ce94de | 165 | unsigned long bflags; |
f28491e0 | 166 | struct btrfs_fs_info *fs_info; |
3083ee2e | 167 | spinlock_t refs_lock; |
727011e0 | 168 | atomic_t refs; |
0b32f4bb | 169 | atomic_t io_pages; |
5cf1ab56 | 170 | int read_mirror; |
19fe0a8b | 171 | struct rcu_head rcu_head; |
5b25f70f | 172 | pid_t lock_owner; |
b4ce94de | 173 | |
bd681513 CM |
174 | /* count of read lock holders on the extent buffer */ |
175 | atomic_t write_locks; | |
176 | atomic_t read_locks; | |
177 | atomic_t blocking_writers; | |
178 | atomic_t blocking_readers; | |
179 | atomic_t spinning_readers; | |
180 | atomic_t spinning_writers; | |
656f30db FM |
181 | short lock_nested; |
182 | /* >= 0 if eb belongs to a log tree, -1 otherwise */ | |
183 | short log_index; | |
bd681513 CM |
184 | |
185 | /* protects write locks */ | |
186 | rwlock_t lock; | |
187 | ||
188 | /* readers use lock_wq while they wait for the write | |
189 | * lock holders to unlock | |
190 | */ | |
191 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 192 | |
bd681513 CM |
193 | /* writers use read_lock_wq while they wait for readers |
194 | * to unlock | |
b4ce94de | 195 | */ |
bd681513 | 196 | wait_queue_head_t read_lock_wq; |
b8dae313 | 197 | struct page *pages[INLINE_EXTENT_BUFFER_PAGES]; |
6d49ba1b ES |
198 | #ifdef CONFIG_BTRFS_DEBUG |
199 | struct list_head leak_list; | |
200 | #endif | |
d1310b2e CM |
201 | }; |
202 | ||
ac467772 QW |
203 | /* |
204 | * Structure to record how many bytes and which ranges are set/cleared | |
205 | */ | |
206 | struct extent_changeset { | |
207 | /* How many bytes are set/cleared in this operation */ | |
208 | u64 bytes_changed; | |
209 | ||
210 | /* Changed ranges */ | |
53d32359 | 211 | struct ulist range_changed; |
ac467772 QW |
212 | }; |
213 | ||
261507a0 LZ |
214 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
215 | int compress_type) | |
216 | { | |
217 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
218 | } | |
219 | ||
220 | static inline int extent_compress_type(unsigned long bio_flags) | |
221 | { | |
222 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
223 | } | |
224 | ||
d1310b2e CM |
225 | struct extent_map_tree; |
226 | ||
fc4f21b1 | 227 | typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode, |
d1310b2e | 228 | struct page *page, |
306e16ce | 229 | size_t pg_offset, |
d1310b2e CM |
230 | u64 start, u64 len, |
231 | int create); | |
232 | ||
233 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 234 | struct address_space *mapping); |
d1310b2e | 235 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
236 | struct extent_io_tree *tree, struct page *page, |
237 | gfp_t mask); | |
f7a52a40 | 238 | int try_release_extent_buffer(struct page *page); |
1edbb734 | 239 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
ff13db41 | 240 | struct extent_state **cached); |
cd716d8f DS |
241 | |
242 | static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) | |
243 | { | |
244 | return lock_extent_bits(tree, start, end, NULL); | |
245 | } | |
246 | ||
d0082371 | 247 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); |
d1310b2e | 248 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 249 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
250 | int __init extent_io_init(void); |
251 | void extent_io_exit(void); | |
252 | ||
253 | u64 count_range_bits(struct extent_io_tree *tree, | |
254 | u64 *start, u64 search_end, | |
9ee49a04 | 255 | u64 max_bytes, unsigned bits, int contig); |
d1310b2e | 256 | |
4845e44f | 257 | void free_extent_state(struct extent_state *state); |
d1310b2e | 258 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 259 | unsigned bits, int filled, |
41074888 | 260 | struct extent_state *cached_state); |
fefdc557 | 261 | int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
f734c44a | 262 | unsigned bits, struct extent_changeset *changeset); |
e6dcd2dc | 263 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 264 | unsigned bits, int wake, int delete, |
41074888 | 265 | struct extent_state **cached, gfp_t mask); |
c6317955 | 266 | |
e83b1d91 DS |
267 | static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) |
268 | { | |
269 | return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL, | |
270 | GFP_NOFS); | |
271 | } | |
272 | ||
273 | static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start, | |
274 | u64 end, struct extent_state **cached, gfp_t mask) | |
275 | { | |
276 | return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, | |
277 | mask); | |
278 | } | |
279 | ||
280 | static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start, | |
91166212 | 281 | u64 end, unsigned bits) |
e83b1d91 DS |
282 | { |
283 | int wake = 0; | |
284 | ||
285 | if (bits & EXTENT_LOCKED) | |
286 | wake = 1; | |
287 | ||
91166212 DS |
288 | return clear_extent_bit(tree, start, end, bits, wake, 0, NULL, |
289 | GFP_NOFS); | |
e83b1d91 DS |
290 | } |
291 | ||
d38ed27f | 292 | int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c53b912 | 293 | unsigned bits, struct extent_changeset *changeset); |
4845e44f | 294 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 295 | unsigned bits, u64 *failed_start, |
4845e44f | 296 | struct extent_state **cached_state, gfp_t mask); |
c6317955 DS |
297 | |
298 | static inline int set_extent_bits(struct extent_io_tree *tree, u64 start, | |
ceeb0ae7 | 299 | u64 end, unsigned bits) |
c6317955 | 300 | { |
ceeb0ae7 | 301 | return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS); |
c6317955 DS |
302 | } |
303 | ||
e83b1d91 DS |
304 | static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, |
305 | u64 end, struct extent_state **cached_state, gfp_t mask) | |
306 | { | |
307 | return clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0, | |
308 | cached_state, mask); | |
309 | } | |
c6317955 DS |
310 | |
311 | static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start, | |
312 | u64 end, gfp_t mask) | |
313 | { | |
314 | return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, | |
315 | NULL, mask); | |
316 | } | |
317 | ||
e83b1d91 | 318 | static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start, |
af6f8f60 | 319 | u64 end) |
e83b1d91 DS |
320 | { |
321 | return clear_extent_bit(tree, start, end, | |
322 | EXTENT_DIRTY | EXTENT_DELALLOC | | |
af6f8f60 | 323 | EXTENT_DO_ACCOUNTING, 0, 0, NULL, GFP_NOFS); |
e83b1d91 DS |
324 | } |
325 | ||
462d6fac | 326 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9ee49a04 | 327 | unsigned bits, unsigned clear_bits, |
210aa277 | 328 | struct extent_state **cached_state); |
c6317955 DS |
329 | |
330 | static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start, | |
7cd8c752 | 331 | u64 end, struct extent_state **cached_state) |
c6317955 DS |
332 | { |
333 | return set_extent_bit(tree, start, end, | |
334 | EXTENT_DELALLOC | EXTENT_UPTODATE, | |
7cd8c752 | 335 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
336 | } |
337 | ||
338 | static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start, | |
018ed4f7 | 339 | u64 end, struct extent_state **cached_state) |
c6317955 DS |
340 | { |
341 | return set_extent_bit(tree, start, end, | |
342 | EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, | |
018ed4f7 | 343 | NULL, cached_state, GFP_NOFS); |
c6317955 DS |
344 | } |
345 | ||
346 | static inline int set_extent_new(struct extent_io_tree *tree, u64 start, | |
3744dbeb | 347 | u64 end) |
c6317955 | 348 | { |
3744dbeb DS |
349 | return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, |
350 | GFP_NOFS); | |
c6317955 DS |
351 | } |
352 | ||
353 | static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, | |
354 | u64 end, struct extent_state **cached_state, gfp_t mask) | |
355 | { | |
356 | return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL, | |
357 | cached_state, mask); | |
358 | } | |
359 | ||
d1310b2e | 360 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
9ee49a04 | 361 | u64 *start_ret, u64 *end_ret, unsigned bits, |
e6138876 | 362 | struct extent_state **cached_state); |
d1310b2e CM |
363 | int extent_invalidatepage(struct extent_io_tree *tree, |
364 | struct page *page, unsigned long offset); | |
365 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
366 | get_extent_t *get_extent, | |
367 | struct writeback_control *wbc); | |
771ed689 CM |
368 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
369 | u64 start, u64 end, get_extent_t *get_extent, | |
370 | int mode); | |
d1310b2e CM |
371 | int extent_writepages(struct extent_io_tree *tree, |
372 | struct address_space *mapping, | |
373 | get_extent_t *get_extent, | |
374 | struct writeback_control *wbc); | |
0b32f4bb JB |
375 | int btree_write_cache_pages(struct address_space *mapping, |
376 | struct writeback_control *wbc); | |
d1310b2e CM |
377 | int extent_readpages(struct extent_io_tree *tree, |
378 | struct address_space *mapping, | |
379 | struct list_head *pages, unsigned nr_pages, | |
380 | get_extent_t get_extent); | |
1506fcc8 YS |
381 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
382 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
383 | void set_page_extent_mapped(struct page *page); |
384 | ||
f28491e0 | 385 | struct extent_buffer *alloc_extent_buffer(struct btrfs_fs_info *fs_info, |
ce3e6984 | 386 | u64 start); |
0f331229 OS |
387 | struct extent_buffer *__alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
388 | u64 start, unsigned long len); | |
3f556f78 | 389 | struct extent_buffer *alloc_dummy_extent_buffer(struct btrfs_fs_info *fs_info, |
da17066c | 390 | u64 start); |
815a51c7 | 391 | struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src); |
f28491e0 | 392 | struct extent_buffer *find_extent_buffer(struct btrfs_fs_info *fs_info, |
452c75c3 | 393 | u64 start); |
d1310b2e | 394 | void free_extent_buffer(struct extent_buffer *eb); |
3083ee2e | 395 | void free_extent_buffer_stale(struct extent_buffer *eb); |
bb82ab88 AJ |
396 | #define WAIT_NONE 0 |
397 | #define WAIT_COMPLETE 1 | |
398 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 399 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
8436ea91 | 400 | struct extent_buffer *eb, int wait, |
f188591e | 401 | get_extent_t *get_extent, int mirror_num); |
fd8b2b61 | 402 | void wait_on_extent_buffer_writeback(struct extent_buffer *eb); |
479ed9ab RD |
403 | |
404 | static inline unsigned long num_extent_pages(u64 start, u64 len) | |
405 | { | |
09cbfeaf KS |
406 | return ((start + len + PAGE_SIZE - 1) >> PAGE_SHIFT) - |
407 | (start >> PAGE_SHIFT); | |
479ed9ab RD |
408 | } |
409 | ||
d1310b2e CM |
410 | static inline void extent_buffer_get(struct extent_buffer *eb) |
411 | { | |
412 | atomic_inc(&eb->refs); | |
413 | } | |
414 | ||
415 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
416 | unsigned long start, | |
417 | unsigned long len); | |
418 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
419 | unsigned long start, | |
420 | unsigned long len); | |
550ac1d8 GH |
421 | int read_extent_buffer_to_user(struct extent_buffer *eb, void __user *dst, |
422 | unsigned long start, | |
423 | unsigned long len); | |
f157bf76 DS |
424 | void write_extent_buffer_fsid(struct extent_buffer *eb, const void *src); |
425 | void write_extent_buffer_chunk_tree_uuid(struct extent_buffer *eb, | |
426 | const void *src); | |
d1310b2e CM |
427 | void write_extent_buffer(struct extent_buffer *eb, const void *src, |
428 | unsigned long start, unsigned long len); | |
58e8012c DS |
429 | void copy_extent_buffer_full(struct extent_buffer *dst, |
430 | struct extent_buffer *src); | |
d1310b2e CM |
431 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, |
432 | unsigned long dst_offset, unsigned long src_offset, | |
433 | unsigned long len); | |
434 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
435 | unsigned long src_offset, unsigned long len); | |
436 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
437 | unsigned long src_offset, unsigned long len); | |
b159fa28 DS |
438 | void memzero_extent_buffer(struct extent_buffer *eb, unsigned long start, |
439 | unsigned long len); | |
3e1e8bb7 OS |
440 | int extent_buffer_test_bit(struct extent_buffer *eb, unsigned long start, |
441 | unsigned long pos); | |
442 | void extent_buffer_bitmap_set(struct extent_buffer *eb, unsigned long start, | |
443 | unsigned long pos, unsigned long len); | |
444 | void extent_buffer_bitmap_clear(struct extent_buffer *eb, unsigned long start, | |
445 | unsigned long pos, unsigned long len); | |
1d4284bd | 446 | void clear_extent_buffer_dirty(struct extent_buffer *eb); |
0b32f4bb | 447 | int set_extent_buffer_dirty(struct extent_buffer *eb); |
09c25a8c | 448 | void set_extent_buffer_uptodate(struct extent_buffer *eb); |
69ba3927 | 449 | void clear_extent_buffer_uptodate(struct extent_buffer *eb); |
0b32f4bb | 450 | int extent_buffer_uptodate(struct extent_buffer *eb); |
a26e8c9f | 451 | int extent_buffer_under_io(struct extent_buffer *eb); |
d1310b2e | 452 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 453 | unsigned long min_len, char **map, |
d1310b2e | 454 | unsigned long *map_start, |
a6591715 | 455 | unsigned long *map_len); |
bd1fa4f0 | 456 | void extent_range_clear_dirty_for_io(struct inode *inode, u64 start, u64 end); |
f6311572 | 457 | void extent_range_redirty_for_io(struct inode *inode, u64 start, u64 end); |
a9d93e17 | 458 | void extent_clear_unlock_delalloc(struct inode *inode, u64 start, u64 end, |
ba8b04c1 | 459 | u64 delalloc_end, struct page *locked_page, |
9ee49a04 | 460 | unsigned bits_to_clear, |
c2790a2e | 461 | unsigned long page_ops); |
88f794ed MX |
462 | struct bio * |
463 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
464 | gfp_t gfp_flags); | |
9be3395b CM |
465 | struct bio *btrfs_io_bio_alloc(gfp_t gfp_mask, unsigned int nr_iovecs); |
466 | struct bio *btrfs_bio_clone(struct bio *bio, gfp_t gfp_mask); | |
4a54c8c1 | 467 | |
3ec706c8 | 468 | struct btrfs_fs_info; |
9d4f7f8a | 469 | struct btrfs_inode; |
4a54c8c1 | 470 | |
9d4f7f8a NB |
471 | int repair_io_failure(struct btrfs_inode *inode, u64 start, u64 length, |
472 | u64 logical, struct page *page, | |
473 | unsigned int pg_offset, int mirror_num); | |
b30cb441 NB |
474 | int clean_io_failure(struct btrfs_inode *inode, u64 start, |
475 | struct page *page, unsigned int pg_offset); | |
b5227c07 | 476 | void end_extent_writepage(struct page *page, int err, u64 start, u64 end); |
2ff7e61e JM |
477 | int repair_eb_io_failure(struct btrfs_fs_info *fs_info, |
478 | struct extent_buffer *eb, int mirror_num); | |
2fe6303e MX |
479 | |
480 | /* | |
481 | * When IO fails, either with EIO or csum verification fails, we | |
482 | * try other mirrors that might have a good copy of the data. This | |
483 | * io_failure_record is used to record state as we go through all the | |
484 | * mirrors. If another mirror has good data, the page is set up to date | |
485 | * and things continue. If a good mirror can't be found, the original | |
486 | * bio end_io callback is called to indicate things have failed. | |
487 | */ | |
488 | struct io_failure_record { | |
489 | struct page *page; | |
490 | u64 start; | |
491 | u64 len; | |
492 | u64 logical; | |
493 | unsigned long bio_flags; | |
494 | int this_mirror; | |
495 | int failed_mirror; | |
496 | int in_validation; | |
497 | }; | |
498 | ||
4ac1f4ac | 499 | |
7ab7956e NB |
500 | void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start, |
501 | u64 end); | |
2fe6303e MX |
502 | int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, |
503 | struct io_failure_record **failrec_ret); | |
504 | int btrfs_check_repairable(struct inode *inode, struct bio *failed_bio, | |
505 | struct io_failure_record *failrec, int fail_mirror); | |
506 | struct bio *btrfs_create_repair_bio(struct inode *inode, struct bio *failed_bio, | |
507 | struct io_failure_record *failrec, | |
508 | struct page *page, int pg_offset, int icsum, | |
8b110e39 | 509 | bio_end_io_t *endio_func, void *data); |
4ac1f4ac | 510 | int free_io_failure(struct btrfs_inode *inode, struct io_failure_record *rec); |
294e30fe JB |
511 | #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS |
512 | noinline u64 find_lock_delalloc_range(struct inode *inode, | |
513 | struct extent_io_tree *tree, | |
514 | struct page *locked_page, u64 *start, | |
515 | u64 *end, u64 max_bytes); | |
0d4cf4e6 | 516 | #endif |
faa2dbf0 | 517 | struct extent_buffer *alloc_test_extent_buffer(struct btrfs_fs_info *fs_info, |
da17066c | 518 | u64 start); |
294e30fe | 519 | #endif |