Commit | Line | Data |
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d1310b2e CM |
1 | #ifndef __EXTENTIO__ |
2 | #define __EXTENTIO__ | |
3 | ||
4 | #include <linux/rbtree.h> | |
5 | ||
6 | /* bits for the extent state */ | |
7 | #define EXTENT_DIRTY 1 | |
8 | #define EXTENT_WRITEBACK (1 << 1) | |
9 | #define EXTENT_UPTODATE (1 << 2) | |
10 | #define EXTENT_LOCKED (1 << 3) | |
11 | #define EXTENT_NEW (1 << 4) | |
12 | #define EXTENT_DELALLOC (1 << 5) | |
13 | #define EXTENT_DEFRAG (1 << 6) | |
14 | #define EXTENT_DEFRAG_DONE (1 << 7) | |
15 | #define EXTENT_BUFFER_FILLED (1 << 8) | |
8b62b72b CM |
16 | #define EXTENT_BOUNDARY (1 << 9) |
17 | #define EXTENT_NODATASUM (1 << 10) | |
32c00aff | 18 | #define EXTENT_DO_ACCOUNTING (1 << 11) |
0ca1f7ce | 19 | #define EXTENT_FIRST_DELALLOC (1 << 12) |
1728366e | 20 | #define EXTENT_NEED_WAIT (1 << 13) |
806468f8 | 21 | #define EXTENT_DAMAGED (1 << 14) |
d1310b2e | 22 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
0ca1f7ce | 23 | #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC) |
d1310b2e | 24 | |
261507a0 LZ |
25 | /* |
26 | * flags for bio submission. The high bits indicate the compression | |
27 | * type for this bio | |
28 | */ | |
c8b97818 | 29 | #define EXTENT_BIO_COMPRESSED 1 |
261507a0 | 30 | #define EXTENT_BIO_FLAG_SHIFT 16 |
c8b97818 | 31 | |
b4ce94de CM |
32 | /* these are bit numbers for test/set bit */ |
33 | #define EXTENT_BUFFER_UPTODATE 0 | |
34 | #define EXTENT_BUFFER_BLOCKING 1 | |
b9473439 | 35 | #define EXTENT_BUFFER_DIRTY 2 |
a826d6dc | 36 | #define EXTENT_BUFFER_CORRUPT 3 |
ab0fff03 | 37 | #define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */ |
3083ee2e JB |
38 | #define EXTENT_BUFFER_TREE_REF 5 |
39 | #define EXTENT_BUFFER_STALE 6 | |
0b32f4bb JB |
40 | #define EXTENT_BUFFER_WRITEBACK 7 |
41 | #define EXTENT_BUFFER_IOERR 8 | |
815a51c7 | 42 | #define EXTENT_BUFFER_DUMMY 9 |
b4ce94de | 43 | |
a791e35e CM |
44 | /* these are flags for extent_clear_unlock_delalloc */ |
45 | #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 | |
46 | #define EXTENT_CLEAR_UNLOCK 0x2 | |
47 | #define EXTENT_CLEAR_DELALLOC 0x4 | |
48 | #define EXTENT_CLEAR_DIRTY 0x8 | |
49 | #define EXTENT_SET_WRITEBACK 0x10 | |
50 | #define EXTENT_END_WRITEBACK 0x20 | |
51 | #define EXTENT_SET_PRIVATE2 0x40 | |
32c00aff | 52 | #define EXTENT_CLEAR_ACCOUNTING 0x80 |
a791e35e | 53 | |
d1310b2e CM |
54 | /* |
55 | * page->private values. Every page that is controlled by the extent | |
56 | * map has page->private set to one. | |
57 | */ | |
58 | #define EXTENT_PAGE_PRIVATE 1 | |
59 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
60 | ||
70dec807 | 61 | struct extent_state; |
ea466794 | 62 | struct btrfs_root; |
70dec807 | 63 | |
44b8bd7e | 64 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 | 65 | struct bio *bio, int mirror_num, |
eaf25d93 | 66 | unsigned long bio_flags, u64 bio_offset); |
d1310b2e | 67 | struct extent_io_ops { |
c8b97818 | 68 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
69 | u64 start, u64 end, int *page_started, |
70 | unsigned long *nr_written); | |
247e743c | 71 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 72 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 73 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 74 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
75 | size_t size, struct bio *bio, |
76 | unsigned long bio_flags); | |
d1310b2e | 77 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
ea466794 | 78 | int (*readpage_io_failed_hook)(struct page *page, int failed_mirror); |
70dec807 | 79 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
5cf1ab56 | 80 | struct extent_state *state, int mirror); |
1259ab75 | 81 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 82 | struct extent_state *state, int uptodate); |
1bf85046 JM |
83 | void (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
84 | int *bits); | |
85 | void (*clear_bit_hook)(struct inode *inode, struct extent_state *state, | |
86 | int *bits); | |
87 | void (*merge_extent_hook)(struct inode *inode, | |
88 | struct extent_state *new, | |
89 | struct extent_state *other); | |
90 | void (*split_extent_hook)(struct inode *inode, | |
91 | struct extent_state *orig, u64 split); | |
01d658f2 CM |
92 | int (*write_cache_pages_lock_hook)(struct page *page, void *data, |
93 | void (*flush_fn)(void *)); | |
d1310b2e CM |
94 | }; |
95 | ||
96 | struct extent_io_tree { | |
97 | struct rb_root state; | |
19fe0a8b | 98 | struct radix_tree_root buffer; |
d1310b2e CM |
99 | struct address_space *mapping; |
100 | u64 dirty_bytes; | |
0b32f4bb | 101 | int track_uptodate; |
70dec807 | 102 | spinlock_t lock; |
6af118ce | 103 | spinlock_t buffer_lock; |
d1310b2e | 104 | struct extent_io_ops *ops; |
d1310b2e CM |
105 | }; |
106 | ||
107 | struct extent_state { | |
108 | u64 start; | |
109 | u64 end; /* inclusive */ | |
d1310b2e | 110 | struct rb_node rb_node; |
9ed74f2d JB |
111 | |
112 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 113 | struct extent_io_tree *tree; |
d1310b2e CM |
114 | wait_queue_head_t wq; |
115 | atomic_t refs; | |
116 | unsigned long state; | |
117 | ||
118 | /* for use by the FS */ | |
119 | u64 private; | |
120 | ||
2d2ae547 | 121 | struct list_head leak_list; |
d1310b2e CM |
122 | }; |
123 | ||
727011e0 CM |
124 | #define INLINE_EXTENT_BUFFER_PAGES 16 |
125 | #define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_CACHE_SIZE) | |
d1310b2e CM |
126 | struct extent_buffer { |
127 | u64 start; | |
128 | unsigned long len; | |
d1310b2e CM |
129 | unsigned long map_start; |
130 | unsigned long map_len; | |
b4ce94de | 131 | unsigned long bflags; |
4f2de97a | 132 | struct extent_io_tree *tree; |
3083ee2e | 133 | spinlock_t refs_lock; |
727011e0 | 134 | atomic_t refs; |
0b32f4bb | 135 | atomic_t io_pages; |
5cf1ab56 | 136 | int read_mirror; |
2d2ae547 | 137 | struct list_head leak_list; |
19fe0a8b | 138 | struct rcu_head rcu_head; |
5b25f70f | 139 | pid_t lock_owner; |
b4ce94de | 140 | |
bd681513 CM |
141 | /* count of read lock holders on the extent buffer */ |
142 | atomic_t write_locks; | |
143 | atomic_t read_locks; | |
144 | atomic_t blocking_writers; | |
145 | atomic_t blocking_readers; | |
146 | atomic_t spinning_readers; | |
147 | atomic_t spinning_writers; | |
5b25f70f | 148 | int lock_nested; |
bd681513 CM |
149 | |
150 | /* protects write locks */ | |
151 | rwlock_t lock; | |
152 | ||
153 | /* readers use lock_wq while they wait for the write | |
154 | * lock holders to unlock | |
155 | */ | |
156 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 157 | |
bd681513 CM |
158 | /* writers use read_lock_wq while they wait for readers |
159 | * to unlock | |
b4ce94de | 160 | */ |
bd681513 | 161 | wait_queue_head_t read_lock_wq; |
727011e0 CM |
162 | wait_queue_head_t lock_wq; |
163 | struct page *inline_pages[INLINE_EXTENT_BUFFER_PAGES]; | |
164 | struct page **pages; | |
d1310b2e CM |
165 | }; |
166 | ||
261507a0 LZ |
167 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
168 | int compress_type) | |
169 | { | |
170 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
171 | } | |
172 | ||
173 | static inline int extent_compress_type(unsigned long bio_flags) | |
174 | { | |
175 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
176 | } | |
177 | ||
d1310b2e CM |
178 | struct extent_map_tree; |
179 | ||
180 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
181 | struct page *page, | |
306e16ce | 182 | size_t pg_offset, |
d1310b2e CM |
183 | u64 start, u64 len, |
184 | int create); | |
185 | ||
186 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 187 | struct address_space *mapping); |
d1310b2e | 188 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
189 | struct extent_io_tree *tree, struct page *page, |
190 | gfp_t mask); | |
3083ee2e | 191 | int try_release_extent_buffer(struct page *page, gfp_t mask); |
7b13b7b1 CM |
192 | int try_release_extent_state(struct extent_map_tree *map, |
193 | struct extent_io_tree *tree, struct page *page, | |
194 | gfp_t mask); | |
d0082371 | 195 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end); |
1edbb734 | 196 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
d0082371 JM |
197 | int bits, struct extent_state **cached); |
198 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end); | |
2ac55d41 JB |
199 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
200 | struct extent_state **cached, gfp_t mask); | |
d0082371 | 201 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); |
d1310b2e | 202 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 203 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
204 | int __init extent_io_init(void); |
205 | void extent_io_exit(void); | |
206 | ||
207 | u64 count_range_bits(struct extent_io_tree *tree, | |
208 | u64 *start, u64 search_end, | |
ec29ed5b | 209 | u64 max_bytes, unsigned long bits, int contig); |
d1310b2e | 210 | |
4845e44f | 211 | void free_extent_state(struct extent_state *state); |
d1310b2e | 212 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9655d298 | 213 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
214 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
215 | int bits, gfp_t mask); | |
e6dcd2dc | 216 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
217 | int bits, int wake, int delete, struct extent_state **cached, |
218 | gfp_t mask); | |
d1310b2e CM |
219 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
220 | int bits, gfp_t mask); | |
4845e44f | 221 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
3fbe5c02 | 222 | int bits, u64 *failed_start, |
4845e44f | 223 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e | 224 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
507903b8 | 225 | struct extent_state **cached_state, gfp_t mask); |
5fd02043 JB |
226 | int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
227 | struct extent_state **cached_state, gfp_t mask); | |
d1310b2e CM |
228 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, |
229 | gfp_t mask); | |
230 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
231 | gfp_t mask); | |
232 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
233 | gfp_t mask); | |
462d6fac JB |
234 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
235 | int bits, int clear_bits, gfp_t mask); | |
d1310b2e | 236 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
2ac55d41 | 237 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
238 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
239 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
240 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
241 | u64 start, int bits); | |
d1310b2e CM |
242 | int extent_invalidatepage(struct extent_io_tree *tree, |
243 | struct page *page, unsigned long offset); | |
244 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
245 | get_extent_t *get_extent, | |
246 | struct writeback_control *wbc); | |
771ed689 CM |
247 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
248 | u64 start, u64 end, get_extent_t *get_extent, | |
249 | int mode); | |
d1310b2e CM |
250 | int extent_writepages(struct extent_io_tree *tree, |
251 | struct address_space *mapping, | |
252 | get_extent_t *get_extent, | |
253 | struct writeback_control *wbc); | |
0b32f4bb JB |
254 | int btree_write_cache_pages(struct address_space *mapping, |
255 | struct writeback_control *wbc); | |
d1310b2e CM |
256 | int extent_readpages(struct extent_io_tree *tree, |
257 | struct address_space *mapping, | |
258 | struct list_head *pages, unsigned nr_pages, | |
259 | get_extent_t get_extent); | |
1506fcc8 YS |
260 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
261 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
262 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); |
263 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
264 | void set_page_extent_mapped(struct page *page); | |
265 | ||
266 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
727011e0 | 267 | u64 start, unsigned long len); |
815a51c7 JS |
268 | struct extent_buffer *alloc_dummy_extent_buffer(u64 start, unsigned long len); |
269 | struct extent_buffer *btrfs_clone_extent_buffer(struct extent_buffer *src); | |
d1310b2e | 270 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, |
f09d1f60 | 271 | u64 start, unsigned long len); |
d1310b2e | 272 | void free_extent_buffer(struct extent_buffer *eb); |
3083ee2e | 273 | void free_extent_buffer_stale(struct extent_buffer *eb); |
bb82ab88 AJ |
274 | #define WAIT_NONE 0 |
275 | #define WAIT_COMPLETE 1 | |
276 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 277 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
a86c12c7 | 278 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 279 | get_extent_t *get_extent, int mirror_num); |
4a54c8c1 JS |
280 | unsigned long num_extent_pages(u64 start, u64 len); |
281 | struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i); | |
d1310b2e CM |
282 | |
283 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
284 | { | |
285 | atomic_inc(&eb->refs); | |
286 | } | |
287 | ||
288 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
289 | unsigned long start, | |
290 | unsigned long len); | |
291 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
292 | unsigned long start, | |
293 | unsigned long len); | |
294 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
295 | unsigned long start, unsigned long len); | |
296 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
297 | unsigned long dst_offset, unsigned long src_offset, | |
298 | unsigned long len); | |
299 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
300 | unsigned long src_offset, unsigned long len); | |
301 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
302 | unsigned long src_offset, unsigned long len); | |
303 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
304 | unsigned long start, unsigned long len); | |
143bede5 | 305 | void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); |
1d4284bd | 306 | void clear_extent_buffer_dirty(struct extent_buffer *eb); |
0b32f4bb JB |
307 | int set_extent_buffer_dirty(struct extent_buffer *eb); |
308 | int set_extent_buffer_uptodate(struct extent_buffer *eb); | |
309 | int clear_extent_buffer_uptodate(struct extent_buffer *eb); | |
310 | int extent_buffer_uptodate(struct extent_buffer *eb); | |
d1310b2e | 311 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 312 | unsigned long min_len, char **map, |
d1310b2e | 313 | unsigned long *map_start, |
a6591715 | 314 | unsigned long *map_len); |
ce9adaa5 CM |
315 | int extent_range_uptodate(struct extent_io_tree *tree, |
316 | u64 start, u64 end); | |
c8b97818 CM |
317 | int extent_clear_unlock_delalloc(struct inode *inode, |
318 | struct extent_io_tree *tree, | |
319 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 320 | unsigned long op); |
88f794ed MX |
321 | struct bio * |
322 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
323 | gfp_t gfp_flags); | |
4a54c8c1 JS |
324 | |
325 | struct btrfs_mapping_tree; | |
326 | ||
327 | int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, | |
328 | u64 length, u64 logical, struct page *page, | |
329 | int mirror_num); | |
87826df0 | 330 | int end_extent_writepage(struct page *page, int err, u64 start, u64 end); |
ea466794 JB |
331 | int repair_eb_io_failure(struct btrfs_root *root, struct extent_buffer *eb, |
332 | int mirror_num); | |
d1310b2e | 333 | #endif |