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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> | |
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 */ |
b4ce94de | 38 | |
a791e35e CM |
39 | /* these are flags for extent_clear_unlock_delalloc */ |
40 | #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 | |
41 | #define EXTENT_CLEAR_UNLOCK 0x2 | |
42 | #define EXTENT_CLEAR_DELALLOC 0x4 | |
43 | #define EXTENT_CLEAR_DIRTY 0x8 | |
44 | #define EXTENT_SET_WRITEBACK 0x10 | |
45 | #define EXTENT_END_WRITEBACK 0x20 | |
46 | #define EXTENT_SET_PRIVATE2 0x40 | |
32c00aff | 47 | #define EXTENT_CLEAR_ACCOUNTING 0x80 |
a791e35e | 48 | |
d1310b2e CM |
49 | /* |
50 | * page->private values. Every page that is controlled by the extent | |
51 | * map has page->private set to one. | |
52 | */ | |
53 | #define EXTENT_PAGE_PRIVATE 1 | |
54 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
55 | ||
70dec807 CM |
56 | struct extent_state; |
57 | ||
44b8bd7e | 58 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 | 59 | struct bio *bio, int mirror_num, |
eaf25d93 | 60 | unsigned long bio_flags, u64 bio_offset); |
d1310b2e | 61 | struct extent_io_ops { |
c8b97818 | 62 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
63 | u64 start, u64 end, int *page_started, |
64 | unsigned long *nr_written); | |
247e743c | 65 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 66 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 67 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 68 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
69 | size_t size, struct bio *bio, |
70 | unsigned long bio_flags); | |
d1310b2e | 71 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f | 72 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
4a54c8c1 | 73 | u64 start, u64 end, u64 failed_mirror, |
7e38326f | 74 | struct extent_state *state); |
1259ab75 CM |
75 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
76 | u64 start, u64 end, | |
77 | struct extent_state *state); | |
70dec807 CM |
78 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
79 | struct extent_state *state); | |
1259ab75 | 80 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 81 | struct extent_state *state, int uptodate); |
1bf85046 JM |
82 | void (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
83 | int *bits); | |
84 | void (*clear_bit_hook)(struct inode *inode, struct extent_state *state, | |
85 | int *bits); | |
86 | void (*merge_extent_hook)(struct inode *inode, | |
87 | struct extent_state *new, | |
88 | struct extent_state *other); | |
89 | void (*split_extent_hook)(struct inode *inode, | |
90 | struct extent_state *orig, u64 split); | |
01d658f2 CM |
91 | int (*write_cache_pages_lock_hook)(struct page *page, void *data, |
92 | void (*flush_fn)(void *)); | |
d1310b2e CM |
93 | }; |
94 | ||
95 | struct extent_io_tree { | |
96 | struct rb_root state; | |
19fe0a8b | 97 | struct radix_tree_root buffer; |
d1310b2e CM |
98 | struct address_space *mapping; |
99 | u64 dirty_bytes; | |
70dec807 | 100 | spinlock_t lock; |
6af118ce | 101 | spinlock_t buffer_lock; |
d1310b2e | 102 | struct extent_io_ops *ops; |
d1310b2e CM |
103 | }; |
104 | ||
105 | struct extent_state { | |
106 | u64 start; | |
107 | u64 end; /* inclusive */ | |
d1310b2e | 108 | struct rb_node rb_node; |
9ed74f2d JB |
109 | |
110 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 111 | struct extent_io_tree *tree; |
d1310b2e CM |
112 | wait_queue_head_t wq; |
113 | atomic_t refs; | |
114 | unsigned long state; | |
115 | ||
116 | /* for use by the FS */ | |
117 | u64 private; | |
118 | ||
2d2ae547 | 119 | struct list_head leak_list; |
d1310b2e CM |
120 | }; |
121 | ||
122 | struct extent_buffer { | |
123 | u64 start; | |
124 | unsigned long len; | |
d1310b2e CM |
125 | unsigned long map_start; |
126 | unsigned long map_len; | |
127 | struct page *first_page; | |
b4ce94de | 128 | unsigned long bflags; |
2d2ae547 | 129 | struct list_head leak_list; |
19fe0a8b | 130 | struct rcu_head rcu_head; |
9eb9104c | 131 | atomic_t refs; |
b4ce94de | 132 | |
bd681513 CM |
133 | /* count of read lock holders on the extent buffer */ |
134 | atomic_t write_locks; | |
135 | atomic_t read_locks; | |
136 | atomic_t blocking_writers; | |
137 | atomic_t blocking_readers; | |
138 | atomic_t spinning_readers; | |
139 | atomic_t spinning_writers; | |
140 | ||
141 | /* protects write locks */ | |
142 | rwlock_t lock; | |
143 | ||
144 | /* readers use lock_wq while they wait for the write | |
145 | * lock holders to unlock | |
146 | */ | |
147 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 148 | |
bd681513 CM |
149 | /* writers use read_lock_wq while they wait for readers |
150 | * to unlock | |
b4ce94de | 151 | */ |
bd681513 | 152 | wait_queue_head_t read_lock_wq; |
d1310b2e CM |
153 | }; |
154 | ||
261507a0 LZ |
155 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
156 | int compress_type) | |
157 | { | |
158 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
159 | } | |
160 | ||
161 | static inline int extent_compress_type(unsigned long bio_flags) | |
162 | { | |
163 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
164 | } | |
165 | ||
d1310b2e CM |
166 | struct extent_map_tree; |
167 | ||
168 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
169 | struct page *page, | |
306e16ce | 170 | size_t pg_offset, |
d1310b2e CM |
171 | u64 start, u64 len, |
172 | int create); | |
173 | ||
174 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 175 | struct address_space *mapping); |
d1310b2e | 176 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
177 | struct extent_io_tree *tree, struct page *page, |
178 | gfp_t mask); | |
6af118ce | 179 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
180 | int try_release_extent_state(struct extent_map_tree *map, |
181 | struct extent_io_tree *tree, struct page *page, | |
182 | gfp_t mask); | |
d1310b2e | 183 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 184 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 185 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 186 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
2ac55d41 JB |
187 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
188 | struct extent_state **cached, gfp_t mask); | |
25179201 JB |
189 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
190 | gfp_t mask); | |
d1310b2e | 191 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 192 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
193 | int __init extent_io_init(void); |
194 | void extent_io_exit(void); | |
195 | ||
196 | u64 count_range_bits(struct extent_io_tree *tree, | |
197 | u64 *start, u64 search_end, | |
ec29ed5b | 198 | u64 max_bytes, unsigned long bits, int contig); |
d1310b2e | 199 | |
4845e44f | 200 | void free_extent_state(struct extent_state *state); |
d1310b2e | 201 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9655d298 | 202 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
203 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
204 | int bits, gfp_t mask); | |
e6dcd2dc | 205 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
206 | int bits, int wake, int delete, struct extent_state **cached, |
207 | gfp_t mask); | |
d1310b2e CM |
208 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
209 | int bits, gfp_t mask); | |
4845e44f CM |
210 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
211 | int bits, int exclusive_bits, u64 *failed_start, | |
212 | struct extent_state **cached_state, gfp_t mask); | |
d1310b2e | 213 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
507903b8 | 214 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
215 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, |
216 | gfp_t mask); | |
217 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
218 | gfp_t mask); | |
219 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
220 | gfp_t mask); | |
462d6fac JB |
221 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
222 | int bits, int clear_bits, gfp_t mask); | |
d1310b2e | 223 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
2ac55d41 | 224 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
225 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
226 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
227 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
228 | u64 start, int bits); | |
d1310b2e CM |
229 | int extent_invalidatepage(struct extent_io_tree *tree, |
230 | struct page *page, unsigned long offset); | |
231 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
232 | get_extent_t *get_extent, | |
233 | struct writeback_control *wbc); | |
771ed689 CM |
234 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
235 | u64 start, u64 end, get_extent_t *get_extent, | |
236 | int mode); | |
d1310b2e CM |
237 | int extent_writepages(struct extent_io_tree *tree, |
238 | struct address_space *mapping, | |
239 | get_extent_t *get_extent, | |
240 | struct writeback_control *wbc); | |
241 | int extent_readpages(struct extent_io_tree *tree, | |
242 | struct address_space *mapping, | |
243 | struct list_head *pages, unsigned nr_pages, | |
244 | get_extent_t get_extent); | |
1506fcc8 YS |
245 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
246 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
247 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); |
248 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
249 | void set_page_extent_mapped(struct page *page); | |
250 | ||
251 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
252 | u64 start, unsigned long len, | |
ba144192 | 253 | struct page *page0); |
d1310b2e | 254 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, |
f09d1f60 | 255 | u64 start, unsigned long len); |
d1310b2e | 256 | void free_extent_buffer(struct extent_buffer *eb); |
bb82ab88 AJ |
257 | #define WAIT_NONE 0 |
258 | #define WAIT_COMPLETE 1 | |
259 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 260 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
a86c12c7 | 261 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 262 | get_extent_t *get_extent, int mirror_num); |
4a54c8c1 JS |
263 | unsigned long num_extent_pages(u64 start, u64 len); |
264 | struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i); | |
d1310b2e CM |
265 | |
266 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
267 | { | |
268 | atomic_inc(&eb->refs); | |
269 | } | |
270 | ||
271 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
272 | unsigned long start, | |
273 | unsigned long len); | |
274 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
275 | unsigned long start, | |
276 | unsigned long len); | |
277 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
278 | unsigned long start, unsigned long len); | |
279 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
280 | unsigned long dst_offset, unsigned long src_offset, | |
281 | unsigned long len); | |
282 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
283 | unsigned long src_offset, unsigned long len); | |
284 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
285 | unsigned long src_offset, unsigned long len); | |
286 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
287 | unsigned long start, unsigned long len); | |
e6dcd2dc | 288 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); |
d1310b2e CM |
289 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
290 | struct extent_buffer *eb); | |
291 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
292 | struct extent_buffer *eb); | |
293 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
294 | struct extent_buffer *eb); | |
1259ab75 | 295 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
296 | struct extent_buffer *eb, |
297 | struct extent_state **cached_state); | |
d1310b2e | 298 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
299 | struct extent_buffer *eb, |
300 | struct extent_state *cached_state); | |
d1310b2e | 301 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 302 | unsigned long min_len, char **map, |
d1310b2e | 303 | unsigned long *map_start, |
a6591715 | 304 | unsigned long *map_len); |
ce9adaa5 CM |
305 | int extent_range_uptodate(struct extent_io_tree *tree, |
306 | u64 start, u64 end); | |
c8b97818 CM |
307 | int extent_clear_unlock_delalloc(struct inode *inode, |
308 | struct extent_io_tree *tree, | |
309 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 310 | unsigned long op); |
88f794ed MX |
311 | struct bio * |
312 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
313 | gfp_t gfp_flags); | |
4a54c8c1 JS |
314 | |
315 | struct btrfs_mapping_tree; | |
316 | ||
317 | int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, | |
318 | u64 length, u64 logical, struct page *page, | |
319 | int mirror_num); | |
d1310b2e | 320 | #endif |