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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) |
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 |
ab0fff03 | 36 | #define EXTENT_BUFFER_READAHEAD 4 /* this got triggered by readahead */ |
b4ce94de | 37 | |
a791e35e CM |
38 | /* these are flags for extent_clear_unlock_delalloc */ |
39 | #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 | |
40 | #define EXTENT_CLEAR_UNLOCK 0x2 | |
41 | #define EXTENT_CLEAR_DELALLOC 0x4 | |
42 | #define EXTENT_CLEAR_DIRTY 0x8 | |
43 | #define EXTENT_SET_WRITEBACK 0x10 | |
44 | #define EXTENT_END_WRITEBACK 0x20 | |
45 | #define EXTENT_SET_PRIVATE2 0x40 | |
32c00aff | 46 | #define EXTENT_CLEAR_ACCOUNTING 0x80 |
a791e35e | 47 | |
d1310b2e CM |
48 | /* |
49 | * page->private values. Every page that is controlled by the extent | |
50 | * map has page->private set to one. | |
51 | */ | |
52 | #define EXTENT_PAGE_PRIVATE 1 | |
53 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
54 | ||
70dec807 CM |
55 | struct extent_state; |
56 | ||
44b8bd7e | 57 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 | 58 | struct bio *bio, int mirror_num, |
eaf25d93 | 59 | unsigned long bio_flags, u64 bio_offset); |
d1310b2e | 60 | struct extent_io_ops { |
c8b97818 | 61 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
62 | u64 start, u64 end, int *page_started, |
63 | unsigned long *nr_written); | |
247e743c | 64 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 65 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 66 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 67 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
68 | size_t size, struct bio *bio, |
69 | unsigned long bio_flags); | |
d1310b2e | 70 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
71 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
72 | u64 start, u64 end, | |
73 | struct extent_state *state); | |
1259ab75 CM |
74 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
75 | u64 start, u64 end, | |
76 | struct extent_state *state); | |
70dec807 CM |
77 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
78 | struct extent_state *state); | |
1259ab75 | 79 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 80 | struct extent_state *state, int uptodate); |
1bf85046 JM |
81 | void (*set_bit_hook)(struct inode *inode, struct extent_state *state, |
82 | int *bits); | |
83 | void (*clear_bit_hook)(struct inode *inode, struct extent_state *state, | |
84 | int *bits); | |
85 | void (*merge_extent_hook)(struct inode *inode, | |
86 | struct extent_state *new, | |
87 | struct extent_state *other); | |
88 | void (*split_extent_hook)(struct inode *inode, | |
89 | struct extent_state *orig, u64 split); | |
01d658f2 CM |
90 | int (*write_cache_pages_lock_hook)(struct page *page, void *data, |
91 | void (*flush_fn)(void *)); | |
d1310b2e CM |
92 | }; |
93 | ||
94 | struct extent_io_tree { | |
95 | struct rb_root state; | |
19fe0a8b | 96 | struct radix_tree_root buffer; |
d1310b2e CM |
97 | struct address_space *mapping; |
98 | u64 dirty_bytes; | |
70dec807 | 99 | spinlock_t lock; |
6af118ce | 100 | spinlock_t buffer_lock; |
d1310b2e | 101 | struct extent_io_ops *ops; |
d1310b2e CM |
102 | }; |
103 | ||
104 | struct extent_state { | |
105 | u64 start; | |
106 | u64 end; /* inclusive */ | |
d1310b2e | 107 | struct rb_node rb_node; |
9ed74f2d JB |
108 | |
109 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 110 | struct extent_io_tree *tree; |
d1310b2e CM |
111 | wait_queue_head_t wq; |
112 | atomic_t refs; | |
113 | unsigned long state; | |
114 | ||
115 | /* for use by the FS */ | |
116 | u64 private; | |
117 | ||
2d2ae547 | 118 | struct list_head leak_list; |
d1310b2e CM |
119 | }; |
120 | ||
121 | struct extent_buffer { | |
122 | u64 start; | |
123 | unsigned long len; | |
d1310b2e CM |
124 | unsigned long map_start; |
125 | unsigned long map_len; | |
126 | struct page *first_page; | |
b4ce94de | 127 | unsigned long bflags; |
2d2ae547 | 128 | struct list_head leak_list; |
19fe0a8b | 129 | struct rcu_head rcu_head; |
9eb9104c | 130 | atomic_t refs; |
b4ce94de | 131 | |
bd681513 CM |
132 | /* count of read lock holders on the extent buffer */ |
133 | atomic_t write_locks; | |
134 | atomic_t read_locks; | |
135 | atomic_t blocking_writers; | |
136 | atomic_t blocking_readers; | |
137 | atomic_t spinning_readers; | |
138 | atomic_t spinning_writers; | |
139 | ||
140 | /* protects write locks */ | |
141 | rwlock_t lock; | |
142 | ||
143 | /* readers use lock_wq while they wait for the write | |
144 | * lock holders to unlock | |
145 | */ | |
146 | wait_queue_head_t write_lock_wq; | |
b4ce94de | 147 | |
bd681513 CM |
148 | /* writers use read_lock_wq while they wait for readers |
149 | * to unlock | |
b4ce94de | 150 | */ |
bd681513 | 151 | wait_queue_head_t read_lock_wq; |
d1310b2e CM |
152 | }; |
153 | ||
261507a0 LZ |
154 | static inline void extent_set_compress_type(unsigned long *bio_flags, |
155 | int compress_type) | |
156 | { | |
157 | *bio_flags |= compress_type << EXTENT_BIO_FLAG_SHIFT; | |
158 | } | |
159 | ||
160 | static inline int extent_compress_type(unsigned long bio_flags) | |
161 | { | |
162 | return bio_flags >> EXTENT_BIO_FLAG_SHIFT; | |
163 | } | |
164 | ||
d1310b2e CM |
165 | struct extent_map_tree; |
166 | ||
167 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
168 | struct page *page, | |
306e16ce | 169 | size_t pg_offset, |
d1310b2e CM |
170 | u64 start, u64 len, |
171 | int create); | |
172 | ||
173 | void extent_io_tree_init(struct extent_io_tree *tree, | |
f993c883 | 174 | struct address_space *mapping); |
d1310b2e | 175 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
176 | struct extent_io_tree *tree, struct page *page, |
177 | gfp_t mask); | |
6af118ce | 178 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
179 | int try_release_extent_state(struct extent_map_tree *map, |
180 | struct extent_io_tree *tree, struct page *page, | |
181 | gfp_t mask); | |
d1310b2e | 182 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 183 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 184 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 185 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
2ac55d41 JB |
186 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
187 | struct extent_state **cached, gfp_t mask); | |
25179201 JB |
188 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
189 | gfp_t mask); | |
d1310b2e CM |
190 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
191 | get_extent_t *get_extent); | |
192 | int __init extent_io_init(void); | |
193 | void extent_io_exit(void); | |
194 | ||
195 | u64 count_range_bits(struct extent_io_tree *tree, | |
196 | u64 *start, u64 search_end, | |
ec29ed5b | 197 | u64 max_bytes, unsigned long bits, int contig); |
d1310b2e | 198 | |
4845e44f | 199 | void free_extent_state(struct extent_state *state); |
d1310b2e | 200 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
9655d298 | 201 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
202 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
203 | int bits, gfp_t mask); | |
e6dcd2dc | 204 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
205 | int bits, int wake, int delete, struct extent_state **cached, |
206 | gfp_t mask); | |
d1310b2e CM |
207 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
208 | int bits, gfp_t mask); | |
4845e44f CM |
209 | int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
210 | int bits, int exclusive_bits, u64 *failed_start, | |
211 | struct extent_state **cached_state, gfp_t mask); | |
d1310b2e | 212 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, |
507903b8 | 213 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
214 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, |
215 | gfp_t mask); | |
216 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
217 | gfp_t mask); | |
218 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
219 | gfp_t mask); | |
462d6fac JB |
220 | int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
221 | int bits, int clear_bits, gfp_t mask); | |
d1310b2e | 222 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
2ac55d41 | 223 | struct extent_state **cached_state, gfp_t mask); |
d1310b2e CM |
224 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
225 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
226 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
227 | u64 start, int bits); | |
d1310b2e CM |
228 | int extent_invalidatepage(struct extent_io_tree *tree, |
229 | struct page *page, unsigned long offset); | |
230 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
231 | get_extent_t *get_extent, | |
232 | struct writeback_control *wbc); | |
771ed689 CM |
233 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
234 | u64 start, u64 end, get_extent_t *get_extent, | |
235 | int mode); | |
d1310b2e CM |
236 | int extent_writepages(struct extent_io_tree *tree, |
237 | struct address_space *mapping, | |
238 | get_extent_t *get_extent, | |
239 | struct writeback_control *wbc); | |
240 | int extent_readpages(struct extent_io_tree *tree, | |
241 | struct address_space *mapping, | |
242 | struct list_head *pages, unsigned nr_pages, | |
243 | get_extent_t get_extent); | |
1506fcc8 YS |
244 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
245 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
246 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); |
247 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
248 | void set_page_extent_mapped(struct page *page); | |
249 | ||
250 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
251 | u64 start, unsigned long len, | |
ba144192 | 252 | struct page *page0); |
d1310b2e | 253 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, |
f09d1f60 | 254 | u64 start, unsigned long len); |
d1310b2e | 255 | void free_extent_buffer(struct extent_buffer *eb); |
bb82ab88 AJ |
256 | #define WAIT_NONE 0 |
257 | #define WAIT_COMPLETE 1 | |
258 | #define WAIT_PAGE_LOCK 2 | |
d1310b2e | 259 | int read_extent_buffer_pages(struct extent_io_tree *tree, |
a86c12c7 | 260 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 261 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
262 | |
263 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
264 | { | |
265 | atomic_inc(&eb->refs); | |
266 | } | |
267 | ||
268 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
269 | unsigned long start, | |
270 | unsigned long len); | |
271 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
272 | unsigned long start, | |
273 | unsigned long len); | |
274 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
275 | unsigned long start, unsigned long len); | |
276 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
277 | unsigned long dst_offset, unsigned long src_offset, | |
278 | unsigned long len); | |
279 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
280 | unsigned long src_offset, unsigned long len); | |
281 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
282 | unsigned long src_offset, unsigned long len); | |
283 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
284 | unsigned long start, unsigned long len); | |
e6dcd2dc | 285 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); |
d1310b2e CM |
286 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
287 | struct extent_buffer *eb); | |
288 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
289 | struct extent_buffer *eb); | |
290 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
291 | struct extent_buffer *eb); | |
1259ab75 | 292 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
293 | struct extent_buffer *eb, |
294 | struct extent_state **cached_state); | |
d1310b2e | 295 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
2ac55d41 JB |
296 | struct extent_buffer *eb, |
297 | struct extent_state *cached_state); | |
d1310b2e | 298 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
a6591715 | 299 | unsigned long min_len, char **map, |
d1310b2e | 300 | unsigned long *map_start, |
a6591715 | 301 | unsigned long *map_len); |
ce9adaa5 CM |
302 | int extent_range_uptodate(struct extent_io_tree *tree, |
303 | u64 start, u64 end); | |
c8b97818 CM |
304 | int extent_clear_unlock_delalloc(struct inode *inode, |
305 | struct extent_io_tree *tree, | |
306 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 307 | unsigned long op); |
88f794ed MX |
308 | struct bio * |
309 | btrfs_bio_alloc(struct block_device *bdev, u64 first_sector, int nr_vecs, | |
310 | gfp_t gfp_flags); | |
d1310b2e | 311 | #endif |