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) |
0ef8e451 | 20 | #define EXTENT_DAMAGED (1 << 13) |
d1310b2e | 21 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
0ca1f7ce | 22 | #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC) |
d1310b2e | 23 | |
261507a0 LZ |
24 | /* |
25 | * flags for bio submission. The high bits indicate the compression | |
26 | * type for this bio | |
27 | */ | |
c8b97818 | 28 | #define EXTENT_BIO_COMPRESSED 1 |
261507a0 | 29 | #define EXTENT_BIO_FLAG_SHIFT 16 |
c8b97818 | 30 | |
b4ce94de CM |
31 | /* these are bit numbers for test/set bit */ |
32 | #define EXTENT_BUFFER_UPTODATE 0 | |
33 | #define EXTENT_BUFFER_BLOCKING 1 | |
b9473439 | 34 | #define EXTENT_BUFFER_DIRTY 2 |
a826d6dc | 35 | #define EXTENT_BUFFER_CORRUPT 3 |
b4ce94de | 36 | |
a791e35e CM |
37 | /* these are flags for extent_clear_unlock_delalloc */ |
38 | #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 | |
39 | #define EXTENT_CLEAR_UNLOCK 0x2 | |
40 | #define EXTENT_CLEAR_DELALLOC 0x4 | |
41 | #define EXTENT_CLEAR_DIRTY 0x8 | |
42 | #define EXTENT_SET_WRITEBACK 0x10 | |
43 | #define EXTENT_END_WRITEBACK 0x20 | |
44 | #define EXTENT_SET_PRIVATE2 0x40 | |
32c00aff | 45 | #define EXTENT_CLEAR_ACCOUNTING 0x80 |
a791e35e | 46 | |
d1310b2e CM |
47 | /* |
48 | * page->private values. Every page that is controlled by the extent | |
49 | * map has page->private set to one. | |
50 | */ | |
51 | #define EXTENT_PAGE_PRIVATE 1 | |
52 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
53 | ||
70dec807 CM |
54 | struct extent_state; |
55 | ||
44b8bd7e | 56 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 | 57 | struct bio *bio, int mirror_num, |
eaf25d93 | 58 | unsigned long bio_flags, u64 bio_offset); |
d1310b2e | 59 | struct extent_io_ops { |
c8b97818 | 60 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
61 | u64 start, u64 end, int *page_started, |
62 | unsigned long *nr_written); | |
247e743c | 63 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 64 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 65 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 66 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
67 | size_t size, struct bio *bio, |
68 | unsigned long bio_flags); | |
d1310b2e | 69 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
70 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
71 | u64 start, u64 end, | |
72 | struct extent_state *state); | |
1259ab75 CM |
73 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
74 | u64 start, u64 end, | |
75 | struct extent_state *state); | |
70dec807 CM |
76 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
77 | struct extent_state *state); | |
1259ab75 | 78 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 79 | struct extent_state *state, int uptodate); |
1bf85046 JM |
80 | void (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
81 | int *bits); | |
82 | void (*clear_bit_hook)(struct inode *inode, struct extent_state *state, | |
83 | int *bits); | |
84 | void (*merge_extent_hook)(struct inode *inode, | |
85 | struct extent_state *new, | |
86 | struct extent_state *other); | |
87 | void (*split_extent_hook)(struct inode *inode, | |
88 | struct extent_state *orig, u64 split); | |
4bef0848 | 89 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
90 | }; |
91 | ||
92 | struct extent_io_tree { | |
93 | struct rb_root state; | |
19fe0a8b | 94 | struct radix_tree_root buffer; |
d1310b2e CM |
95 | struct address_space *mapping; |
96 | u64 dirty_bytes; | |
70dec807 | 97 | spinlock_t lock; |
6af118ce | 98 | spinlock_t buffer_lock; |
d1310b2e | 99 | struct extent_io_ops *ops; |
d1310b2e CM |
100 | }; |
101 | ||
102 | struct extent_state { | |
103 | u64 start; | |
104 | u64 end; /* inclusive */ | |
d1310b2e | 105 | struct rb_node rb_node; |
9ed74f2d JB |
106 | |
107 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 108 | struct extent_io_tree *tree; |
d1310b2e CM |
109 | wait_queue_head_t wq; |
110 | atomic_t refs; | |
111 | unsigned long state; | |
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; | |
d1310b2e CM |
122 | unsigned long map_start; |
123 | unsigned long map_len; | |
124 | struct page *first_page; | |
b4ce94de | 125 | unsigned long bflags; |
2d2ae547 | 126 | struct list_head leak_list; |
19fe0a8b | 127 | struct rcu_head rcu_head; |
9eb9104c | 128 | atomic_t refs; |
b4ce94de | 129 | |
bd681513 CM |
130 | /* count of read lock holders on the extent buffer */ |
131 | atomic_t write_locks; | |
132 | atomic_t read_locks; | |
133 | atomic_t blocking_writers; | |
134 | atomic_t blocking_readers; | |
135 | atomic_t spinning_readers; | |
136 | atomic_t spinning_writers; | |
137 | ||
138 | /* protects write locks */ | |
139 | rwlock_t lock; | |
140 | ||
141 | /* readers use lock_wq while they wait for the write | |
142 | * lock holders to unlock | |
143 | */ | |
144 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 145 | |
bd681513 CM |
146 | /* writers use read_lock_wq while they wait for readers |
147 | * to unlock | |
b4ce94de | 148 | */ |
bd681513 | 149 | wait_queue_head_t read_lock_wq; |
d1310b2e CM |
150 | }; |
151 | ||
261507a0 LZ |
152 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
153 | int compress_type) | |
154 | { | |
155 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
156 | } | |
157 | ||
158 | static inline int extent_compress_type(unsigned long bio_flags) | |
159 | { | |
160 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
161 | } | |
162 | ||
d1310b2e CM |
163 | struct extent_map_tree; |
164 | ||
165 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
166 | struct page *page, | |
306e16ce | 167 | size_t pg_offset, |
d1310b2e CM |
168 | u64 start, u64 len, |
169 | int create); | |
170 | ||
171 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 172 | struct address_space *mapping); |
d1310b2e | 173 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
174 | struct extent_io_tree *tree, struct page *page, |
175 | gfp_t mask); | |
6af118ce | 176 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
177 | int try_release_extent_state(struct extent_map_tree *map, |
178 | struct extent_io_tree *tree, struct page *page, | |
179 | gfp_t mask); | |
d1310b2e | 180 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 181 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 182 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 183 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
2ac55d41 JB |
184 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
185 | struct extent_state **cached, gfp_t mask); | |
25179201 JB |
186 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
187 | gfp_t mask); | |
d1310b2e | 188 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 189 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
190 | int __init extent_io_init(void); |
191 | void extent_io_exit(void); | |
192 | ||
193 | u64 count_range_bits(struct extent_io_tree *tree, | |
194 | u64 *start, u64 search_end, | |
ec29ed5b | 195 | u64 max_bytes, unsigned long bits, int contig); |
d1310b2e | 196 | |
4845e44f | 197 | void free_extent_state(struct extent_state *state); |
d1310b2e | 198 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9655d298 | 199 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
200 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
201 | int bits, gfp_t mask); | |
e6dcd2dc | 202 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
203 | int bits, int wake, int delete, struct extent_state **cached, |
204 | gfp_t mask); | |
d1310b2e CM |
205 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
206 | int bits, gfp_t mask); | |
4845e44f CM |
207 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
208 | int bits, int exclusive_bits, u64 *failed_start, | |
209 | struct extent_state **cached_state, gfp_t mask); | |
d1310b2e | 210 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
507903b8 | 211 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
212 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, |
213 | gfp_t mask); | |
214 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
215 | gfp_t mask); | |
216 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
217 | gfp_t mask); | |
218 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, | |
2ac55d41 | 219 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
220 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
221 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
222 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
223 | u64 start, int bits); | |
d1310b2e CM |
224 | int extent_invalidatepage(struct extent_io_tree *tree, |
225 | struct page *page, unsigned long offset); | |
226 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
227 | get_extent_t *get_extent, | |
228 | struct writeback_control *wbc); | |
771ed689 CM |
229 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
230 | u64 start, u64 end, get_extent_t *get_extent, | |
231 | int mode); | |
d1310b2e CM |
232 | int extent_writepages(struct extent_io_tree *tree, |
233 | struct address_space *mapping, | |
234 | get_extent_t *get_extent, | |
235 | struct writeback_control *wbc); | |
236 | int extent_readpages(struct extent_io_tree *tree, | |
237 | struct address_space *mapping, | |
238 | struct list_head *pages, unsigned nr_pages, | |
239 | get_extent_t get_extent); | |
1506fcc8 YS |
240 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
241 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
242 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); |
243 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
244 | void set_page_extent_mapped(struct page *page); | |
245 | ||
246 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
247 | u64 start, unsigned long len, | |
ba144192 | 248 | struct page *page0); |
d1310b2e | 249 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, |
f09d1f60 | 250 | u64 start, unsigned long len); |
d1310b2e CM |
251 | void free_extent_buffer(struct extent_buffer *eb); |
252 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 253 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 254 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
255 | |
256 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
257 | { | |
258 | atomic_inc(&eb->refs); | |
259 | } | |
260 | ||
261 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
262 | unsigned long start, | |
263 | unsigned long len); | |
264 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
265 | unsigned long start, | |
266 | unsigned long len); | |
267 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
268 | unsigned long start, unsigned long len); | |
269 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
270 | unsigned long dst_offset, unsigned long src_offset, | |
271 | unsigned long len); | |
272 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
273 | unsigned long src_offset, unsigned long len); | |
274 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
275 | unsigned long src_offset, unsigned long len); | |
276 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
277 | unsigned long start, unsigned long len); | |
e6dcd2dc | 278 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); |
d1310b2e CM |
279 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
280 | struct extent_buffer *eb); | |
281 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
282 | struct extent_buffer *eb); | |
283 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
284 | struct extent_buffer *eb); | |
1259ab75 | 285 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
286 | struct extent_buffer *eb, |
287 | struct extent_state **cached_state); | |
d1310b2e | 288 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
289 | struct extent_buffer *eb, |
290 | struct extent_state *cached_state); | |
d1310b2e | 291 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 292 | unsigned long min_len, char **map, |
d1310b2e | 293 | unsigned long *map_start, |
a6591715 | 294 | unsigned long *map_len); |
ce9adaa5 CM |
295 | int extent_range_uptodate(struct extent_io_tree *tree, |
296 | u64 start, u64 end); | |
c8b97818 CM |
297 | int extent_clear_unlock_delalloc(struct inode *inode, |
298 | struct extent_io_tree *tree, | |
299 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 300 | unsigned long op); |
88f794ed MX |
301 | struct bio * |
302 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
303 | gfp_t gfp_flags); | |
d1310b2e | 304 | #endif |