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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) | |
d1310b2e CM |
18 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
19 | ||
c8b97818 CM |
20 | /* flags for bio submission */ |
21 | #define EXTENT_BIO_COMPRESSED 1 | |
22 | ||
b4ce94de CM |
23 | /* these are bit numbers for test/set bit */ |
24 | #define EXTENT_BUFFER_UPTODATE 0 | |
25 | #define EXTENT_BUFFER_BLOCKING 1 | |
b9473439 | 26 | #define EXTENT_BUFFER_DIRTY 2 |
b4ce94de | 27 | |
d1310b2e CM |
28 | /* |
29 | * page->private values. Every page that is controlled by the extent | |
30 | * map has page->private set to one. | |
31 | */ | |
32 | #define EXTENT_PAGE_PRIVATE 1 | |
33 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
34 | ||
70dec807 CM |
35 | struct extent_state; |
36 | ||
44b8bd7e | 37 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 CM |
38 | struct bio *bio, int mirror_num, |
39 | unsigned long bio_flags); | |
d1310b2e | 40 | struct extent_io_ops { |
c8b97818 | 41 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
42 | u64 start, u64 end, int *page_started, |
43 | unsigned long *nr_written); | |
247e743c | 44 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 45 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 46 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 47 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
48 | size_t size, struct bio *bio, |
49 | unsigned long bio_flags); | |
d1310b2e | 50 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
51 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
52 | u64 start, u64 end, | |
53 | struct extent_state *state); | |
1259ab75 CM |
54 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
55 | u64 start, u64 end, | |
56 | struct extent_state *state); | |
70dec807 CM |
57 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
58 | struct extent_state *state); | |
1259ab75 | 59 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 60 | struct extent_state *state, int uptodate); |
291d673e | 61 | int (*set_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 62 | unsigned long old, unsigned long bits); |
9ed74f2d JB |
63 | int (*clear_bit_hook)(struct inode *inode, struct extent_state *state, |
64 | unsigned long bits); | |
65 | int (*merge_extent_hook)(struct inode *inode, | |
66 | struct extent_state *new, | |
67 | struct extent_state *other); | |
68 | int (*split_extent_hook)(struct inode *inode, | |
69 | struct extent_state *orig, u64 split); | |
4bef0848 | 70 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
71 | }; |
72 | ||
73 | struct extent_io_tree { | |
74 | struct rb_root state; | |
6af118ce | 75 | struct rb_root buffer; |
d1310b2e CM |
76 | struct address_space *mapping; |
77 | u64 dirty_bytes; | |
70dec807 | 78 | spinlock_t lock; |
6af118ce | 79 | spinlock_t buffer_lock; |
d1310b2e | 80 | struct extent_io_ops *ops; |
d1310b2e CM |
81 | }; |
82 | ||
83 | struct extent_state { | |
84 | u64 start; | |
85 | u64 end; /* inclusive */ | |
d1310b2e | 86 | struct rb_node rb_node; |
9ed74f2d JB |
87 | |
88 | /* ADD NEW ELEMENTS AFTER THIS */ | |
70dec807 | 89 | struct extent_io_tree *tree; |
d1310b2e CM |
90 | wait_queue_head_t wq; |
91 | atomic_t refs; | |
92 | unsigned long state; | |
9ed74f2d JB |
93 | u64 split_start; |
94 | u64 split_end; | |
d1310b2e CM |
95 | |
96 | /* for use by the FS */ | |
97 | u64 private; | |
98 | ||
2d2ae547 | 99 | struct list_head leak_list; |
d1310b2e CM |
100 | }; |
101 | ||
102 | struct extent_buffer { | |
103 | u64 start; | |
104 | unsigned long len; | |
105 | char *map_token; | |
106 | char *kaddr; | |
107 | unsigned long map_start; | |
108 | unsigned long map_len; | |
109 | struct page *first_page; | |
b4ce94de | 110 | unsigned long bflags; |
d1310b2e | 111 | atomic_t refs; |
2d2ae547 | 112 | struct list_head leak_list; |
6af118ce | 113 | struct rb_node rb_node; |
b4ce94de CM |
114 | |
115 | /* the spinlock is used to protect most operations */ | |
116 | spinlock_t lock; | |
117 | ||
118 | /* | |
119 | * when we keep the lock held while blocking, waiters go onto | |
120 | * the wq | |
121 | */ | |
122 | wait_queue_head_t lock_wq; | |
d1310b2e CM |
123 | }; |
124 | ||
125 | struct extent_map_tree; | |
126 | ||
d7fc640e CM |
127 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
128 | { | |
129 | struct rb_node *node; | |
130 | node = rb_next(&state->rb_node); | |
131 | if (!node) | |
132 | return NULL; | |
133 | return rb_entry(node, struct extent_state, rb_node); | |
134 | } | |
135 | ||
d1310b2e CM |
136 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
137 | struct page *page, | |
138 | size_t page_offset, | |
139 | u64 start, u64 len, | |
140 | int create); | |
141 | ||
142 | void extent_io_tree_init(struct extent_io_tree *tree, | |
143 | struct address_space *mapping, gfp_t mask); | |
d1310b2e | 144 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
145 | struct extent_io_tree *tree, struct page *page, |
146 | gfp_t mask); | |
6af118ce | 147 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
148 | int try_release_extent_state(struct extent_map_tree *map, |
149 | struct extent_io_tree *tree, struct page *page, | |
150 | gfp_t mask); | |
d1310b2e | 151 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
1edbb734 | 152 | int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d | 153 | int bits, struct extent_state **cached, gfp_t mask); |
d1310b2e | 154 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
25179201 JB |
155 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
156 | gfp_t mask); | |
d1310b2e CM |
157 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
158 | get_extent_t *get_extent); | |
159 | int __init extent_io_init(void); | |
160 | void extent_io_exit(void); | |
161 | ||
162 | u64 count_range_bits(struct extent_io_tree *tree, | |
163 | u64 *start, u64 search_end, | |
164 | u64 max_bytes, unsigned long bits); | |
165 | ||
166 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, | |
9655d298 | 167 | int bits, int filled, struct extent_state *cached_state); |
d1310b2e CM |
168 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
169 | int bits, gfp_t mask); | |
e6dcd2dc | 170 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
2c64c53d CM |
171 | int bits, int wake, int delete, struct extent_state **cached, |
172 | gfp_t mask); | |
d1310b2e CM |
173 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
174 | int bits, gfp_t mask); | |
175 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, | |
176 | gfp_t mask); | |
177 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, | |
178 | gfp_t mask); | |
179 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
180 | gfp_t mask); | |
181 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
182 | gfp_t mask); | |
e6dcd2dc CM |
183 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
184 | gfp_t mask); | |
185 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, | |
186 | u64 end, gfp_t mask); | |
d1310b2e CM |
187 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
188 | gfp_t mask); | |
e6dcd2dc CM |
189 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
190 | gfp_t mask); | |
d1310b2e CM |
191 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
192 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
193 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
194 | u64 start, int bits); | |
d1310b2e CM |
195 | int extent_invalidatepage(struct extent_io_tree *tree, |
196 | struct page *page, unsigned long offset); | |
197 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
198 | get_extent_t *get_extent, | |
199 | struct writeback_control *wbc); | |
771ed689 CM |
200 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
201 | u64 start, u64 end, get_extent_t *get_extent, | |
202 | int mode); | |
d1310b2e CM |
203 | int extent_writepages(struct extent_io_tree *tree, |
204 | struct address_space *mapping, | |
205 | get_extent_t *get_extent, | |
206 | struct writeback_control *wbc); | |
207 | int extent_readpages(struct extent_io_tree *tree, | |
208 | struct address_space *mapping, | |
209 | struct list_head *pages, unsigned nr_pages, | |
210 | get_extent_t get_extent); | |
211 | int extent_prepare_write(struct extent_io_tree *tree, | |
212 | struct inode *inode, struct page *page, | |
213 | unsigned from, unsigned to, get_extent_t *get_extent); | |
214 | int extent_commit_write(struct extent_io_tree *tree, | |
215 | struct inode *inode, struct page *page, | |
216 | unsigned from, unsigned to); | |
217 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, | |
218 | get_extent_t *get_extent); | |
1506fcc8 YS |
219 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
220 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
221 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); |
222 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); | |
223 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
224 | void set_page_extent_mapped(struct page *page); | |
225 | ||
226 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
227 | u64 start, unsigned long len, | |
228 | struct page *page0, | |
229 | gfp_t mask); | |
230 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, | |
231 | u64 start, unsigned long len, | |
232 | gfp_t mask); | |
233 | void free_extent_buffer(struct extent_buffer *eb); | |
234 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 235 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 236 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
237 | |
238 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
239 | { | |
240 | atomic_inc(&eb->refs); | |
241 | } | |
242 | ||
243 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
244 | unsigned long start, | |
245 | unsigned long len); | |
246 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
247 | unsigned long start, | |
248 | unsigned long len); | |
249 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
250 | unsigned long start, unsigned long len); | |
251 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
252 | unsigned long dst_offset, unsigned long src_offset, | |
253 | unsigned long len); | |
254 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
255 | unsigned long src_offset, unsigned long len); | |
256 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
257 | unsigned long src_offset, unsigned long len); | |
258 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
259 | unsigned long start, unsigned long len); | |
260 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, | |
261 | struct extent_buffer *eb); | |
e6dcd2dc CM |
262 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
263 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); | |
d1310b2e CM |
264 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
265 | struct extent_buffer *eb); | |
266 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
267 | struct extent_buffer *eb); | |
b9473439 CM |
268 | int test_extent_buffer_dirty(struct extent_io_tree *tree, |
269 | struct extent_buffer *eb); | |
d1310b2e CM |
270 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, |
271 | struct extent_buffer *eb); | |
1259ab75 CM |
272 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
273 | struct extent_buffer *eb); | |
d1310b2e CM |
274 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
275 | struct extent_buffer *eb); | |
276 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
277 | unsigned long min_len, char **token, char **map, | |
278 | unsigned long *map_start, | |
279 | unsigned long *map_len, int km); | |
280 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
281 | unsigned long min_len, char **token, char **map, | |
282 | unsigned long *map_start, | |
283 | unsigned long *map_len, int km); | |
284 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); | |
ce9adaa5 CM |
285 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
286 | int extent_range_uptodate(struct extent_io_tree *tree, | |
287 | u64 start, u64 end); | |
c8b97818 CM |
288 | int extent_clear_unlock_delalloc(struct inode *inode, |
289 | struct extent_io_tree *tree, | |
290 | u64 start, u64 end, struct page *locked_page, | |
771ed689 CM |
291 | int unlock_page, |
292 | int clear_unlock, | |
293 | int clear_delalloc, int clear_dirty, | |
294 | int set_writeback, | |
8b62b72b CM |
295 | int end_writeback, |
296 | int set_private2); | |
d1310b2e | 297 | #endif |