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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) |
d1310b2e CM |
19 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
20 | ||
c8b97818 CM |
21 | /* flags for bio submission */ |
22 | #define EXTENT_BIO_COMPRESSED 1 | |
23 | ||
b4ce94de CM |
24 | /* these are bit numbers for test/set bit */ |
25 | #define EXTENT_BUFFER_UPTODATE 0 | |
26 | #define EXTENT_BUFFER_BLOCKING 1 | |
b9473439 | 27 | #define EXTENT_BUFFER_DIRTY 2 |
b4ce94de | 28 | |
a791e35e CM |
29 | /* these are flags for extent_clear_unlock_delalloc */ |
30 | #define EXTENT_CLEAR_UNLOCK_PAGE 0x1 | |
31 | #define EXTENT_CLEAR_UNLOCK 0x2 | |
32 | #define EXTENT_CLEAR_DELALLOC 0x4 | |
33 | #define EXTENT_CLEAR_DIRTY 0x8 | |
34 | #define EXTENT_SET_WRITEBACK 0x10 | |
35 | #define EXTENT_END_WRITEBACK 0x20 | |
36 | #define EXTENT_SET_PRIVATE2 0x40 | |
32c00aff | 37 | #define EXTENT_CLEAR_ACCOUNTING 0x80 |
a791e35e | 38 | |
d1310b2e CM |
39 | /* |
40 | * page->private values. Every page that is controlled by the extent | |
41 | * map has page->private set to one. | |
42 | */ | |
43 | #define EXTENT_PAGE_PRIVATE 1 | |
44 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
45 | ||
70dec807 CM |
46 | struct extent_state; |
47 | ||
44b8bd7e | 48 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 CM |
49 | struct bio *bio, int mirror_num, |
50 | unsigned long bio_flags); | |
d1310b2e | 51 | struct extent_io_ops { |
c8b97818 | 52 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
53 | u64 start, u64 end, int *page_started, |
54 | unsigned long *nr_written); | |
247e743c | 55 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 56 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 57 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 58 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
59 | size_t size, struct bio *bio, |
60 | unsigned long bio_flags); | |
d1310b2e | 61 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
62 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
63 | u64 start, u64 end, | |
64 | struct extent_state *state); | |
1259ab75 CM |
65 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
66 | u64 start, u64 end, | |
67 | struct extent_state *state); | |
70dec807 CM |
68 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
69 | struct extent_state *state); | |
1259ab75 | 70 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 71 | struct extent_state *state, int uptodate); |
291d673e | 72 | int (*set_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 73 | unsigned long old, unsigned long bits); |
9ed74f2d JB |
74 | int (*clear_bit_hook)(struct inode *inode, struct extent_state *state, |
75 | unsigned long bits); | |
76 | int (*merge_extent_hook)(struct inode *inode, | |
77 | struct extent_state *new, | |
78 | struct extent_state *other); | |
79 | int (*split_extent_hook)(struct inode *inode, | |
80 | struct extent_state *orig, u64 split); | |
4bef0848 | 81 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
82 | }; |
83 | ||
84 | struct extent_io_tree { | |
85 | struct rb_root state; | |
6af118ce | 86 | struct rb_root buffer; |
d1310b2e CM |
87 | struct address_space *mapping; |
88 | u64 dirty_bytes; | |
70dec807 | 89 | spinlock_t lock; |
6af118ce | 90 | spinlock_t buffer_lock; |
d1310b2e | 91 | struct extent_io_ops *ops; |
d1310b2e CM |
92 | }; |
93 | ||
94 | struct extent_state { | |
95 | u64 start; | |
96 | u64 end; /* inclusive */ | |
d1310b2e | 97 | struct rb_node rb_node; |
9ed74f2d JB |
98 | |
99 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 100 | struct extent_io_tree *tree; |
d1310b2e CM |
101 | wait_queue_head_t wq; |
102 | atomic_t refs; | |
103 | unsigned long state; | |
9ed74f2d JB |
104 | u64 split_start; |
105 | u64 split_end; | |
d1310b2e CM |
106 | |
107 | /* for use by the FS */ | |
108 | u64 private; | |
109 | ||
2d2ae547 | 110 | struct list_head leak_list; |
d1310b2e CM |
111 | }; |
112 | ||
113 | struct extent_buffer { | |
114 | u64 start; | |
115 | unsigned long len; | |
116 | char *map_token; | |
117 | char *kaddr; | |
118 | unsigned long map_start; | |
119 | unsigned long map_len; | |
120 | struct page *first_page; | |
b4ce94de | 121 | unsigned long bflags; |
d1310b2e | 122 | atomic_t refs; |
2d2ae547 | 123 | struct list_head leak_list; |
6af118ce | 124 | struct rb_node rb_node; |
b4ce94de CM |
125 | |
126 | /* the spinlock is used to protect most operations */ | |
127 | spinlock_t lock; | |
128 | ||
129 | /* | |
130 | * when we keep the lock held while blocking, waiters go onto | |
131 | * the wq | |
132 | */ | |
133 | wait_queue_head_t lock_wq; | |
d1310b2e CM |
134 | }; |
135 | ||
136 | struct extent_map_tree; | |
137 | ||
d7fc640e CM |
138 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
139 | { | |
140 | struct rb_node *node; | |
141 | node = rb_next(&state->rb_node); | |
142 | if (!node) | |
143 | return NULL; | |
144 | return rb_entry(node, struct extent_state, rb_node); | |
145 | } | |
146 | ||
d1310b2e CM |
147 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
148 | struct page *page, | |
149 | size_t page_offset, | |
150 | u64 start, u64 len, | |
151 | int create); | |
152 | ||
153 | void extent_io_tree_init(struct extent_io_tree *tree, | |
154 | struct address_space *mapping, gfp_t mask); | |
d1310b2e | 155 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
156 | struct extent_io_tree *tree, struct page *page, |
157 | gfp_t mask); | |
6af118ce | 158 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
159 | int try_release_extent_state(struct extent_map_tree *map, |
160 | struct extent_io_tree *tree, struct page *page, | |
161 | gfp_t mask); | |
d1310b2e | 162 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 163 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 164 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 165 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
2ac55d41 JB |
166 | int unlock_extent_cached(struct extent_io_tree *tree, u64 start, u64 end, |
167 | struct extent_state **cached, gfp_t mask); | |
25179201 JB |
168 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
169 | gfp_t mask); | |
d1310b2e CM |
170 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
171 | get_extent_t *get_extent); | |
172 | int __init extent_io_init(void); | |
173 | void extent_io_exit(void); | |
174 | ||
175 | u64 count_range_bits(struct extent_io_tree *tree, | |
176 | u64 *start, u64 search_end, | |
177 | u64 max_bytes, unsigned long bits); | |
178 | ||
179 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, | |
9655d298 | 180 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
181 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
182 | int bits, gfp_t mask); | |
e6dcd2dc | 183 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
184 | int bits, int wake, int delete, struct extent_state **cached, |
185 | gfp_t mask); | |
d1310b2e CM |
186 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
187 | int bits, gfp_t mask); | |
188 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, | |
189 | gfp_t mask); | |
190 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, | |
191 | gfp_t mask); | |
192 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
193 | gfp_t mask); | |
194 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
195 | gfp_t mask); | |
e6dcd2dc CM |
196 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
197 | gfp_t mask); | |
198 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, | |
199 | u64 end, gfp_t mask); | |
d1310b2e | 200 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
2ac55d41 | 201 | struct extent_state **cached_state, gfp_t mask); |
e6dcd2dc CM |
202 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
203 | gfp_t mask); | |
d1310b2e CM |
204 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
205 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
206 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
207 | u64 start, int bits); | |
d1310b2e CM |
208 | int extent_invalidatepage(struct extent_io_tree *tree, |
209 | struct page *page, unsigned long offset); | |
210 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
211 | get_extent_t *get_extent, | |
212 | struct writeback_control *wbc); | |
771ed689 CM |
213 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
214 | u64 start, u64 end, get_extent_t *get_extent, | |
215 | int mode); | |
d1310b2e CM |
216 | int extent_writepages(struct extent_io_tree *tree, |
217 | struct address_space *mapping, | |
218 | get_extent_t *get_extent, | |
219 | struct writeback_control *wbc); | |
220 | int extent_readpages(struct extent_io_tree *tree, | |
221 | struct address_space *mapping, | |
222 | struct list_head *pages, unsigned nr_pages, | |
223 | get_extent_t get_extent); | |
224 | int extent_prepare_write(struct extent_io_tree *tree, | |
225 | struct inode *inode, struct page *page, | |
226 | unsigned from, unsigned to, get_extent_t *get_extent); | |
227 | int extent_commit_write(struct extent_io_tree *tree, | |
228 | struct inode *inode, struct page *page, | |
229 | unsigned from, unsigned to); | |
230 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, | |
231 | get_extent_t *get_extent); | |
1506fcc8 YS |
232 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
233 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
234 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); |
235 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); | |
236 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
237 | void set_page_extent_mapped(struct page *page); | |
238 | ||
239 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
240 | u64 start, unsigned long len, | |
241 | struct page *page0, | |
242 | gfp_t mask); | |
243 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, | |
244 | u64 start, unsigned long len, | |
245 | gfp_t mask); | |
246 | void free_extent_buffer(struct extent_buffer *eb); | |
247 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 248 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 249 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
250 | |
251 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
252 | { | |
253 | atomic_inc(&eb->refs); | |
254 | } | |
255 | ||
256 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
257 | unsigned long start, | |
258 | unsigned long len); | |
259 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
260 | unsigned long start, | |
261 | unsigned long len); | |
262 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
263 | unsigned long start, unsigned long len); | |
264 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
265 | unsigned long dst_offset, unsigned long src_offset, | |
266 | unsigned long len); | |
267 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
268 | unsigned long src_offset, unsigned long len); | |
269 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
270 | unsigned long src_offset, unsigned long len); | |
271 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
272 | unsigned long start, unsigned long len); | |
273 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, | |
274 | struct extent_buffer *eb); | |
e6dcd2dc CM |
275 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
276 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); | |
d1310b2e CM |
277 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
278 | struct extent_buffer *eb); | |
279 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
280 | struct extent_buffer *eb); | |
b9473439 CM |
281 | int test_extent_buffer_dirty(struct extent_io_tree *tree, |
282 | struct extent_buffer *eb); | |
d1310b2e CM |
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 CM |
291 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
292 | unsigned long min_len, char **token, char **map, | |
293 | unsigned long *map_start, | |
294 | unsigned long *map_len, int km); | |
295 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
296 | unsigned long min_len, char **token, char **map, | |
297 | unsigned long *map_start, | |
298 | unsigned long *map_len, int km); | |
299 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); | |
ce9adaa5 CM |
300 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
301 | int extent_range_uptodate(struct extent_io_tree *tree, | |
302 | u64 start, u64 end); | |
c8b97818 CM |
303 | int extent_clear_unlock_delalloc(struct inode *inode, |
304 | struct extent_io_tree *tree, | |
305 | u64 start, u64 end, struct page *locked_page, | |
a791e35e | 306 | unsigned long op); |
d1310b2e | 307 | #endif |