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) |
d1310b2e | 20 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
0ca1f7ce | 21 | #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC) |
d1310b2e | 22 | |
261507a0 LZ |
23 | /* |
24 | * flags for bio submission. The high bits indicate the compression | |
25 | * type for this bio | |
26 | */ | |
c8b97818 | 27 | #define EXTENT_BIO_COMPRESSED 1 |
261507a0 | 28 | #define EXTENT_BIO_FLAG_SHIFT 16 |
c8b97818 | 29 | |
b4ce94de CM |
30 | /* these are bit numbers for test/set bit */ |
31 | #define EXTENT_BUFFER_UPTODATE 0 | |
32 | #define EXTENT_BUFFER_BLOCKING 1 | |
b9473439 | 33 | #define EXTENT_BUFFER_DIRTY 2 |
a826d6dc | 34 | #define EXTENT_BUFFER_CORRUPT 3 |
b4ce94de | 35 | |
a791e35e CM |
36 | /* these are flags for extent_clear_unlock_delalloc */ |
37 | #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 | |
38 | #define EXTENT_CLEAR_UNLOCK 0x2 | |
39 | #define EXTENT_CLEAR_DELALLOC 0x4 | |
40 | #define EXTENT_CLEAR_DIRTY 0x8 | |
41 | #define EXTENT_SET_WRITEBACK 0x10 | |
42 | #define EXTENT_END_WRITEBACK 0x20 | |
43 | #define EXTENT_SET_PRIVATE2 0x40 | |
32c00aff | 44 | #define EXTENT_CLEAR_ACCOUNTING 0x80 |
a791e35e | 45 | |
d1310b2e CM |
46 | /* |
47 | * page->private values. Every page that is controlled by the extent | |
48 | * map has page->private set to one. | |
49 | */ | |
50 | #define EXTENT_PAGE_PRIVATE 1 | |
51 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
52 | ||
70dec807 CM |
53 | struct extent_state; |
54 | ||
44b8bd7e | 55 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 | 56 | struct bio *bio, int mirror_num, |
eaf25d93 | 57 | unsigned long bio_flags, u64 bio_offset); |
d1310b2e | 58 | struct extent_io_ops { |
c8b97818 | 59 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
60 | u64 start, u64 end, int *page_started, |
61 | unsigned long *nr_written); | |
247e743c | 62 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 63 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 64 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 65 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
66 | size_t size, struct bio *bio, |
67 | unsigned long bio_flags); | |
d1310b2e | 68 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
69 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
70 | u64 start, u64 end, | |
71 | struct extent_state *state); | |
1259ab75 CM |
72 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
73 | u64 start, u64 end, | |
74 | struct extent_state *state); | |
70dec807 CM |
75 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
76 | struct extent_state *state); | |
1259ab75 | 77 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 78 | struct extent_state *state, int uptodate); |
0ca1f7ce YZ |
79 | int (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
80 | int *bits); | |
9ed74f2d | 81 | int (*clear_bit_hook)(struct inode *inode, struct extent_state *state, |
0ca1f7ce | 82 | int *bits); |
9ed74f2d JB |
83 | int (*merge_extent_hook)(struct inode *inode, |
84 | struct extent_state *new, | |
85 | struct extent_state *other); | |
86 | int (*split_extent_hook)(struct inode *inode, | |
87 | struct extent_state *orig, u64 split); | |
4bef0848 | 88 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
89 | }; |
90 | ||
91 | struct extent_io_tree { | |
92 | struct rb_root state; | |
19fe0a8b | 93 | struct radix_tree_root buffer; |
d1310b2e CM |
94 | struct address_space *mapping; |
95 | u64 dirty_bytes; | |
70dec807 | 96 | spinlock_t lock; |
6af118ce | 97 | spinlock_t buffer_lock; |
d1310b2e | 98 | struct extent_io_ops *ops; |
d1310b2e CM |
99 | }; |
100 | ||
101 | struct extent_state { | |
102 | u64 start; | |
103 | u64 end; /* inclusive */ | |
d1310b2e | 104 | struct rb_node rb_node; |
9ed74f2d JB |
105 | |
106 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 107 | struct extent_io_tree *tree; |
d1310b2e CM |
108 | wait_queue_head_t wq; |
109 | atomic_t refs; | |
110 | unsigned long state; | |
9ed74f2d JB |
111 | u64 split_start; |
112 | u64 split_end; | |
d1310b2e CM |
113 | |
114 | /* for use by the FS */ | |
115 | u64 private; | |
116 | ||
2d2ae547 | 117 | struct list_head leak_list; |
d1310b2e CM |
118 | }; |
119 | ||
120 | struct extent_buffer { | |
121 | u64 start; | |
122 | unsigned long len; | |
d1310b2e CM |
123 | unsigned long map_start; |
124 | unsigned long map_len; | |
125 | struct page *first_page; | |
b4ce94de | 126 | unsigned long bflags; |
2d2ae547 | 127 | struct list_head leak_list; |
19fe0a8b | 128 | struct rcu_head rcu_head; |
9eb9104c | 129 | atomic_t refs; |
b4ce94de | 130 | |
bd681513 CM |
131 | /* count of read lock holders on the extent buffer */ |
132 | atomic_t write_locks; | |
133 | atomic_t read_locks; | |
134 | atomic_t blocking_writers; | |
135 | atomic_t blocking_readers; | |
136 | atomic_t spinning_readers; | |
137 | atomic_t spinning_writers; | |
138 | ||
139 | /* protects write locks */ | |
140 | rwlock_t lock; | |
141 | ||
142 | /* readers use lock_wq while they wait for the write | |
143 | * lock holders to unlock | |
144 | */ | |
145 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 146 | |
bd681513 CM |
147 | /* writers use read_lock_wq while they wait for readers |
148 | * to unlock | |
b4ce94de | 149 | */ |
bd681513 | 150 | wait_queue_head_t read_lock_wq; |
d1310b2e CM |
151 | }; |
152 | ||
261507a0 LZ |
153 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
154 | int compress_type) | |
155 | { | |
156 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
157 | } | |
158 | ||
159 | static inline int extent_compress_type(unsigned long bio_flags) | |
160 | { | |
161 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
162 | } | |
163 | ||
d1310b2e CM |
164 | struct extent_map_tree; |
165 | ||
166 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
167 | struct page *page, | |
306e16ce | 168 | size_t pg_offset, |
d1310b2e CM |
169 | u64 start, u64 len, |
170 | int create); | |
171 | ||
172 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 173 | struct address_space *mapping); |
d1310b2e | 174 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
175 | struct extent_io_tree *tree, struct page *page, |
176 | gfp_t mask); | |
6af118ce | 177 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
178 | int try_release_extent_state(struct extent_map_tree *map, |
179 | struct extent_io_tree *tree, struct page *page, | |
180 | gfp_t mask); | |
d1310b2e | 181 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 182 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 183 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 184 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
2ac55d41 JB |
185 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
186 | struct extent_state **cached, gfp_t mask); | |
25179201 JB |
187 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
188 | gfp_t mask); | |
d1310b2e CM |
189 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
190 | get_extent_t *get_extent); | |
191 | int __init extent_io_init(void); | |
192 | void extent_io_exit(void); | |
193 | ||
194 | u64 count_range_bits(struct extent_io_tree *tree, | |
195 | u64 *start, u64 search_end, | |
ec29ed5b | 196 | u64 max_bytes, unsigned long bits, int contig); |
d1310b2e | 197 | |
4845e44f | 198 | void free_extent_state(struct extent_state *state); |
d1310b2e | 199 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9655d298 | 200 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
201 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
202 | int bits, gfp_t mask); | |
e6dcd2dc | 203 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
204 | int bits, int wake, int delete, struct extent_state **cached, |
205 | gfp_t mask); | |
d1310b2e CM |
206 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
207 | int bits, gfp_t mask); | |
4845e44f CM |
208 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
209 | int bits, int exclusive_bits, u64 *failed_start, | |
210 | struct extent_state **cached_state, gfp_t mask); | |
d1310b2e | 211 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
507903b8 | 212 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
213 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, |
214 | gfp_t mask); | |
215 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
216 | gfp_t mask); | |
217 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
218 | gfp_t mask); | |
219 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, | |
2ac55d41 | 220 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
221 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
222 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
223 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
224 | u64 start, int bits); | |
d1310b2e CM |
225 | int extent_invalidatepage(struct extent_io_tree *tree, |
226 | struct page *page, unsigned long offset); | |
227 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
228 | get_extent_t *get_extent, | |
229 | struct writeback_control *wbc); | |
771ed689 CM |
230 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
231 | u64 start, u64 end, get_extent_t *get_extent, | |
232 | int mode); | |
d1310b2e CM |
233 | int extent_writepages(struct extent_io_tree *tree, |
234 | struct address_space *mapping, | |
235 | get_extent_t *get_extent, | |
236 | struct writeback_control *wbc); | |
237 | int extent_readpages(struct extent_io_tree *tree, | |
238 | struct address_space *mapping, | |
239 | struct list_head *pages, unsigned nr_pages, | |
240 | get_extent_t get_extent); | |
1506fcc8 YS |
241 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
242 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
243 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); |
244 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
245 | void set_page_extent_mapped(struct page *page); | |
246 | ||
247 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
248 | u64 start, unsigned long len, | |
ba144192 | 249 | struct page *page0); |
d1310b2e | 250 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, |
f09d1f60 | 251 | u64 start, unsigned long len); |
d1310b2e CM |
252 | void free_extent_buffer(struct extent_buffer *eb); |
253 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 254 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 255 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
256 | |
257 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
258 | { | |
259 | atomic_inc(&eb->refs); | |
260 | } | |
261 | ||
262 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
263 | unsigned long start, | |
264 | unsigned long len); | |
265 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
266 | unsigned long start, | |
267 | unsigned long len); | |
268 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
269 | unsigned long start, unsigned long len); | |
270 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
271 | unsigned long dst_offset, unsigned long src_offset, | |
272 | unsigned long len); | |
273 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
274 | unsigned long src_offset, unsigned long len); | |
275 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
276 | unsigned long src_offset, unsigned long len); | |
277 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
278 | unsigned long start, unsigned long len); | |
e6dcd2dc | 279 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); |
d1310b2e CM |
280 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
281 | struct extent_buffer *eb); | |
282 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
283 | struct extent_buffer *eb); | |
284 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
285 | struct extent_buffer *eb); | |
1259ab75 | 286 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
287 | struct extent_buffer *eb, |
288 | struct extent_state **cached_state); | |
d1310b2e | 289 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
290 | struct extent_buffer *eb, |
291 | struct extent_state *cached_state); | |
d1310b2e | 292 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 293 | unsigned long min_len, char **map, |
d1310b2e | 294 | unsigned long *map_start, |
a6591715 | 295 | unsigned long *map_len); |
ce9adaa5 CM |
296 | int extent_range_uptodate(struct extent_io_tree *tree, |
297 | u64 start, u64 end); | |
c8b97818 CM |
298 | int extent_clear_unlock_delalloc(struct inode *inode, |
299 | struct extent_io_tree *tree, | |
300 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 301 | unsigned long op); |
88f794ed MX |
302 | struct bio * |
303 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
304 | gfp_t gfp_flags); | |
d1310b2e | 305 | #endif |