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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, |
32240a91 | 73 | u64 start, u64 end, int 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 | ||
727011e0 CM |
122 | #define INLINE_EXTENT_BUFFER_PAGES 16 |
123 | #define MAX_INLINE_EXTENT_BUFFER_SIZE (INLINE_EXTENT_BUFFER_PAGES * PAGE_CACHE_SIZE) | |
d1310b2e CM |
124 | struct extent_buffer { |
125 | u64 start; | |
126 | unsigned long len; | |
d1310b2e CM |
127 | unsigned long map_start; |
128 | unsigned long map_len; | |
b4ce94de | 129 | unsigned long bflags; |
4f2de97a | 130 | struct extent_io_tree *tree; |
727011e0 CM |
131 | atomic_t refs; |
132 | atomic_t pages_reading; | |
2d2ae547 | 133 | struct list_head leak_list; |
19fe0a8b | 134 | struct rcu_head rcu_head; |
5b25f70f | 135 | pid_t lock_owner; |
b4ce94de | 136 | |
bd681513 CM |
137 | /* count of read lock holders on the extent buffer */ |
138 | atomic_t write_locks; | |
139 | atomic_t read_locks; | |
140 | atomic_t blocking_writers; | |
141 | atomic_t blocking_readers; | |
142 | atomic_t spinning_readers; | |
143 | atomic_t spinning_writers; | |
5b25f70f | 144 | int lock_nested; |
bd681513 CM |
145 | |
146 | /* protects write locks */ | |
147 | rwlock_t lock; | |
148 | ||
149 | /* readers use lock_wq while they wait for the write | |
150 | * lock holders to unlock | |
151 | */ | |
152 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 153 | |
bd681513 CM |
154 | /* writers use read_lock_wq while they wait for readers |
155 | * to unlock | |
b4ce94de | 156 | */ |
bd681513 | 157 | wait_queue_head_t read_lock_wq; |
727011e0 CM |
158 | wait_queue_head_t lock_wq; |
159 | struct page *inline_pages[INLINE_EXTENT_BUFFER_PAGES]; | |
160 | struct page **pages; | |
d1310b2e CM |
161 | }; |
162 | ||
261507a0 LZ |
163 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
164 | int compress_type) | |
165 | { | |
166 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
167 | } | |
168 | ||
169 | static inline int extent_compress_type(unsigned long bio_flags) | |
170 | { | |
171 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
172 | } | |
173 | ||
d1310b2e CM |
174 | struct extent_map_tree; |
175 | ||
176 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
177 | struct page *page, | |
306e16ce | 178 | size_t pg_offset, |
d1310b2e CM |
179 | u64 start, u64 len, |
180 | int create); | |
181 | ||
182 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 183 | struct address_space *mapping); |
d1310b2e | 184 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
185 | struct extent_io_tree *tree, struct page *page, |
186 | gfp_t mask); | |
6af118ce | 187 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
188 | int try_release_extent_state(struct extent_map_tree *map, |
189 | struct extent_io_tree *tree, struct page *page, | |
190 | gfp_t mask); | |
d1310b2e | 191 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 192 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 193 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 194 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
2ac55d41 JB |
195 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
196 | struct extent_state **cached, gfp_t mask); | |
25179201 JB |
197 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
198 | gfp_t mask); | |
d1310b2e | 199 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
8ddc7d9c | 200 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
201 | int __init extent_io_init(void); |
202 | void extent_io_exit(void); | |
203 | ||
204 | u64 count_range_bits(struct extent_io_tree *tree, | |
205 | u64 *start, u64 search_end, | |
ec29ed5b | 206 | u64 max_bytes, unsigned long bits, int contig); |
d1310b2e | 207 | |
4845e44f | 208 | void free_extent_state(struct extent_state *state); |
d1310b2e | 209 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9655d298 | 210 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
211 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
212 | int bits, gfp_t mask); | |
e6dcd2dc | 213 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
214 | int bits, int wake, int delete, struct extent_state **cached, |
215 | gfp_t mask); | |
d1310b2e CM |
216 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
217 | int bits, gfp_t mask); | |
4845e44f CM |
218 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
219 | int bits, int exclusive_bits, u64 *failed_start, | |
220 | struct extent_state **cached_state, gfp_t mask); | |
d1310b2e | 221 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
507903b8 | 222 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
223 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, |
224 | gfp_t mask); | |
225 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
226 | gfp_t mask); | |
227 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
228 | gfp_t mask); | |
462d6fac JB |
229 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
230 | int bits, int clear_bits, gfp_t mask); | |
d1310b2e | 231 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
2ac55d41 | 232 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
233 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
234 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
235 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
236 | u64 start, int bits); | |
d1310b2e CM |
237 | int extent_invalidatepage(struct extent_io_tree *tree, |
238 | struct page *page, unsigned long offset); | |
239 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
240 | get_extent_t *get_extent, | |
241 | struct writeback_control *wbc); | |
771ed689 CM |
242 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
243 | u64 start, u64 end, get_extent_t *get_extent, | |
244 | int mode); | |
d1310b2e CM |
245 | int extent_writepages(struct extent_io_tree *tree, |
246 | struct address_space *mapping, | |
247 | get_extent_t *get_extent, | |
248 | struct writeback_control *wbc); | |
249 | int extent_readpages(struct extent_io_tree *tree, | |
250 | struct address_space *mapping, | |
251 | struct list_head *pages, unsigned nr_pages, | |
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_state_private(struct extent_io_tree *tree, u64 start, u64 private); |
256 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
257 | void set_page_extent_mapped(struct page *page); | |
258 | ||
259 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
727011e0 | 260 | u64 start, unsigned long len); |
d1310b2e | 261 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, |
f09d1f60 | 262 | u64 start, unsigned long len); |
d1310b2e | 263 | void free_extent_buffer(struct extent_buffer *eb); |
bb82ab88 AJ |
264 | #define WAIT_NONE 0 |
265 | #define WAIT_COMPLETE 1 | |
266 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 267 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
a86c12c7 | 268 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 269 | get_extent_t *get_extent, int mirror_num); |
4a54c8c1 JS |
270 | unsigned long num_extent_pages(u64 start, u64 len); |
271 | struct page *extent_buffer_page(struct extent_buffer *eb, unsigned long i); | |
d1310b2e CM |
272 | |
273 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
274 | { | |
275 | atomic_inc(&eb->refs); | |
276 | } | |
277 | ||
278 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
279 | unsigned long start, | |
280 | unsigned long len); | |
281 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
282 | unsigned long start, | |
283 | unsigned long len); | |
284 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
285 | unsigned long start, unsigned long len); | |
286 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
287 | unsigned long dst_offset, unsigned long src_offset, | |
288 | unsigned long len); | |
289 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
290 | unsigned long src_offset, unsigned long len); | |
291 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
292 | unsigned long src_offset, unsigned long len); | |
293 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
294 | unsigned long start, unsigned long len); | |
e6dcd2dc | 295 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); |
d1310b2e CM |
296 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
297 | struct extent_buffer *eb); | |
298 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
299 | struct extent_buffer *eb); | |
300 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
301 | struct extent_buffer *eb); | |
1259ab75 | 302 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
303 | struct extent_buffer *eb, |
304 | struct extent_state **cached_state); | |
d1310b2e | 305 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
306 | struct extent_buffer *eb, |
307 | struct extent_state *cached_state); | |
d1310b2e | 308 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 309 | unsigned long min_len, char **map, |
d1310b2e | 310 | unsigned long *map_start, |
a6591715 | 311 | unsigned long *map_len); |
ce9adaa5 CM |
312 | int extent_range_uptodate(struct extent_io_tree *tree, |
313 | u64 start, u64 end); | |
c8b97818 CM |
314 | int extent_clear_unlock_delalloc(struct inode *inode, |
315 | struct extent_io_tree *tree, | |
316 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 317 | unsigned long op); |
88f794ed MX |
318 | struct bio * |
319 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
320 | gfp_t gfp_flags); | |
4a54c8c1 JS |
321 | |
322 | struct btrfs_mapping_tree; | |
323 | ||
324 | int repair_io_failure(struct btrfs_mapping_tree *map_tree, u64 start, | |
325 | u64 length, u64 logical, struct page *page, | |
326 | int mirror_num); | |
87826df0 | 327 | int end_extent_writepage(struct page *page, int err, u64 start, u64 end); |
d1310b2e | 328 | #endif |