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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) |
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 |
b4ce94de | 34 | |
a791e35e CM |
35 | /* these are flags for extent_clear_unlock_delalloc */ |
36 | #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 | |
37 | #define EXTENT_CLEAR_UNLOCK 0x2 | |
38 | #define EXTENT_CLEAR_DELALLOC 0x4 | |
39 | #define EXTENT_CLEAR_DIRTY 0x8 | |
40 | #define EXTENT_SET_WRITEBACK 0x10 | |
41 | #define EXTENT_END_WRITEBACK 0x20 | |
42 | #define EXTENT_SET_PRIVATE2 0x40 | |
32c00aff | 43 | #define EXTENT_CLEAR_ACCOUNTING 0x80 |
a791e35e | 44 | |
d1310b2e CM |
45 | /* |
46 | * page->private values. Every page that is controlled by the extent | |
47 | * map has page->private set to one. | |
48 | */ | |
49 | #define EXTENT_PAGE_PRIVATE 1 | |
50 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
51 | ||
70dec807 CM |
52 | struct extent_state; |
53 | ||
44b8bd7e | 54 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 | 55 | struct bio *bio, int mirror_num, |
eaf25d93 | 56 | unsigned long bio_flags, u64 bio_offset); |
d1310b2e | 57 | struct extent_io_ops { |
c8b97818 | 58 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
59 | u64 start, u64 end, int *page_started, |
60 | unsigned long *nr_written); | |
247e743c | 61 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 62 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 63 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 64 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
65 | size_t size, struct bio *bio, |
66 | unsigned long bio_flags); | |
d1310b2e | 67 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
68 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
69 | u64 start, u64 end, | |
70 | struct extent_state *state); | |
1259ab75 CM |
71 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
72 | u64 start, u64 end, | |
73 | struct extent_state *state); | |
70dec807 CM |
74 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
75 | struct extent_state *state); | |
1259ab75 | 76 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 77 | struct extent_state *state, int uptodate); |
0ca1f7ce YZ |
78 | int (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
79 | int *bits); | |
9ed74f2d | 80 | int (*clear_bit_hook)(struct inode *inode, struct extent_state *state, |
0ca1f7ce | 81 | int *bits); |
9ed74f2d JB |
82 | int (*merge_extent_hook)(struct inode *inode, |
83 | struct extent_state *new, | |
84 | struct extent_state *other); | |
85 | int (*split_extent_hook)(struct inode *inode, | |
86 | struct extent_state *orig, u64 split); | |
4bef0848 | 87 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
88 | }; |
89 | ||
90 | struct extent_io_tree { | |
91 | struct rb_root state; | |
19fe0a8b | 92 | struct radix_tree_root buffer; |
d1310b2e CM |
93 | struct address_space *mapping; |
94 | u64 dirty_bytes; | |
70dec807 | 95 | spinlock_t lock; |
6af118ce | 96 | spinlock_t buffer_lock; |
d1310b2e | 97 | struct extent_io_ops *ops; |
d1310b2e CM |
98 | }; |
99 | ||
100 | struct extent_state { | |
101 | u64 start; | |
102 | u64 end; /* inclusive */ | |
d1310b2e | 103 | struct rb_node rb_node; |
9ed74f2d JB |
104 | |
105 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 106 | struct extent_io_tree *tree; |
d1310b2e CM |
107 | wait_queue_head_t wq; |
108 | atomic_t refs; | |
109 | unsigned long state; | |
9ed74f2d JB |
110 | u64 split_start; |
111 | u64 split_end; | |
d1310b2e CM |
112 | |
113 | /* for use by the FS */ | |
114 | u64 private; | |
115 | ||
2d2ae547 | 116 | struct list_head leak_list; |
d1310b2e CM |
117 | }; |
118 | ||
119 | struct extent_buffer { | |
120 | u64 start; | |
121 | unsigned long len; | |
122 | char *map_token; | |
123 | char *kaddr; | |
124 | unsigned long map_start; | |
125 | unsigned long map_len; | |
126 | struct page *first_page; | |
b4ce94de | 127 | unsigned long bflags; |
d1310b2e | 128 | atomic_t refs; |
2d2ae547 | 129 | struct list_head leak_list; |
19fe0a8b | 130 | struct rcu_head rcu_head; |
b4ce94de CM |
131 | |
132 | /* the spinlock is used to protect most operations */ | |
133 | spinlock_t lock; | |
134 | ||
135 | /* | |
136 | * when we keep the lock held while blocking, waiters go onto | |
137 | * the wq | |
138 | */ | |
139 | wait_queue_head_t lock_wq; | |
d1310b2e CM |
140 | }; |
141 | ||
261507a0 LZ |
142 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
143 | int compress_type) | |
144 | { | |
145 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
146 | } | |
147 | ||
148 | static inline int extent_compress_type(unsigned long bio_flags) | |
149 | { | |
150 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
151 | } | |
152 | ||
d1310b2e CM |
153 | struct extent_map_tree; |
154 | ||
d7fc640e CM |
155 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
156 | { | |
157 | struct rb_node *node; | |
158 | node = rb_next(&state->rb_node); | |
159 | if (!node) | |
160 | return NULL; | |
161 | return rb_entry(node, struct extent_state, rb_node); | |
162 | } | |
163 | ||
d1310b2e CM |
164 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
165 | struct page *page, | |
166 | size_t page_offset, | |
167 | u64 start, u64 len, | |
168 | int create); | |
169 | ||
170 | void extent_io_tree_init(struct extent_io_tree *tree, | |
171 | struct address_space *mapping, gfp_t mask); | |
d1310b2e | 172 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
173 | struct extent_io_tree *tree, struct page *page, |
174 | gfp_t mask); | |
6af118ce | 175 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
176 | int try_release_extent_state(struct extent_map_tree *map, |
177 | struct extent_io_tree *tree, struct page *page, | |
178 | gfp_t mask); | |
d1310b2e | 179 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 180 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 181 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 182 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
2ac55d41 JB |
183 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
184 | struct extent_state **cached, gfp_t mask); | |
25179201 JB |
185 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
186 | gfp_t mask); | |
d1310b2e CM |
187 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
188 | get_extent_t *get_extent); | |
189 | int __init extent_io_init(void); | |
190 | void extent_io_exit(void); | |
191 | ||
192 | u64 count_range_bits(struct extent_io_tree *tree, | |
193 | u64 *start, u64 search_end, | |
194 | u64 max_bytes, unsigned long bits); | |
195 | ||
4845e44f | 196 | void free_extent_state(struct extent_state *state); |
d1310b2e | 197 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9655d298 | 198 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
199 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
200 | int bits, gfp_t mask); | |
e6dcd2dc | 201 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
202 | int bits, int wake, int delete, struct extent_state **cached, |
203 | gfp_t mask); | |
d1310b2e CM |
204 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
205 | int bits, gfp_t mask); | |
4845e44f CM |
206 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
207 | int bits, int exclusive_bits, u64 *failed_start, | |
208 | struct extent_state **cached_state, gfp_t mask); | |
d1310b2e CM |
209 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
210 | gfp_t mask); | |
211 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, | |
212 | gfp_t mask); | |
213 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
214 | gfp_t mask); | |
215 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
216 | gfp_t mask); | |
e6dcd2dc CM |
217 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
218 | gfp_t mask); | |
219 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, | |
220 | u64 end, gfp_t mask); | |
d1310b2e | 221 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
2ac55d41 | 222 | struct extent_state **cached_state, gfp_t mask); |
e6dcd2dc CM |
223 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
224 | 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); | |
245 | int extent_prepare_write(struct extent_io_tree *tree, | |
246 | struct inode *inode, struct page *page, | |
247 | unsigned from, unsigned to, get_extent_t *get_extent); | |
248 | int extent_commit_write(struct extent_io_tree *tree, | |
249 | struct inode *inode, struct page *page, | |
250 | unsigned from, unsigned to); | |
251 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, | |
252 | get_extent_t *get_extent); | |
1506fcc8 YS |
253 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
254 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
255 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); |
256 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); | |
257 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
258 | void set_page_extent_mapped(struct page *page); | |
259 | ||
260 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
261 | u64 start, unsigned long len, | |
262 | struct page *page0, | |
263 | gfp_t mask); | |
264 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, | |
265 | u64 start, unsigned long len, | |
266 | gfp_t mask); | |
267 | void free_extent_buffer(struct extent_buffer *eb); | |
268 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 269 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 270 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
271 | |
272 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
273 | { | |
274 | atomic_inc(&eb->refs); | |
275 | } | |
276 | ||
277 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
278 | unsigned long start, | |
279 | unsigned long len); | |
280 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
281 | unsigned long start, | |
282 | unsigned long len); | |
283 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
284 | unsigned long start, unsigned long len); | |
285 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
286 | unsigned long dst_offset, unsigned long src_offset, | |
287 | unsigned long len); | |
288 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
289 | unsigned long src_offset, unsigned long len); | |
290 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
291 | unsigned long src_offset, unsigned long len); | |
292 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
293 | unsigned long start, unsigned long len); | |
294 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, | |
295 | struct extent_buffer *eb); | |
e6dcd2dc CM |
296 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
297 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); | |
d1310b2e CM |
298 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
299 | struct extent_buffer *eb); | |
300 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
301 | struct extent_buffer *eb); | |
b9473439 CM |
302 | int test_extent_buffer_dirty(struct extent_io_tree *tree, |
303 | struct extent_buffer *eb); | |
d1310b2e CM |
304 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, |
305 | struct extent_buffer *eb); | |
1259ab75 | 306 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
307 | struct extent_buffer *eb, |
308 | struct extent_state **cached_state); | |
d1310b2e | 309 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
310 | struct extent_buffer *eb, |
311 | struct extent_state *cached_state); | |
d1310b2e CM |
312 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
313 | unsigned long min_len, char **token, char **map, | |
314 | unsigned long *map_start, | |
315 | unsigned long *map_len, int km); | |
316 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
317 | unsigned long min_len, char **token, char **map, | |
318 | unsigned long *map_start, | |
319 | unsigned long *map_len, int km); | |
320 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); | |
ce9adaa5 CM |
321 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
322 | int extent_range_uptodate(struct extent_io_tree *tree, | |
323 | u64 start, u64 end); | |
c8b97818 CM |
324 | int extent_clear_unlock_delalloc(struct inode *inode, |
325 | struct extent_io_tree *tree, | |
326 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 327 | unsigned long op); |
88f794ed MX |
328 | struct bio * |
329 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
330 | gfp_t gfp_flags); | |
d1310b2e | 331 | #endif |