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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) | |
e6dcd2dc CM |
16 | #define EXTENT_ORDERED (1 << 9) |
17 | #define EXTENT_ORDERED_METADATA (1 << 10) | |
d1310b2e CM |
18 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
19 | ||
20 | /* | |
21 | * page->private values. Every page that is controlled by the extent | |
22 | * map has page->private set to one. | |
23 | */ | |
24 | #define EXTENT_PAGE_PRIVATE 1 | |
25 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
26 | ||
70dec807 CM |
27 | struct extent_state; |
28 | ||
44b8bd7e CM |
29 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
30 | struct bio *bio, int mirror_num); | |
d1310b2e CM |
31 | struct extent_io_ops { |
32 | int (*fill_delalloc)(struct inode *inode, u64 start, u64 end); | |
247e743c | 33 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 34 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 35 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 CM |
36 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
37 | size_t size, struct bio *bio); | |
d1310b2e | 38 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
39 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
40 | u64 start, u64 end, | |
41 | struct extent_state *state); | |
1259ab75 CM |
42 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
43 | u64 start, u64 end, | |
44 | struct extent_state *state); | |
70dec807 CM |
45 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
46 | struct extent_state *state); | |
1259ab75 | 47 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 48 | struct extent_state *state, int uptodate); |
291d673e | 49 | int (*set_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 50 | unsigned long old, unsigned long bits); |
291d673e | 51 | int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 52 | unsigned long old, unsigned long bits); |
d1310b2e CM |
53 | }; |
54 | ||
55 | struct extent_io_tree { | |
56 | struct rb_root state; | |
57 | struct address_space *mapping; | |
58 | u64 dirty_bytes; | |
70dec807 | 59 | spinlock_t lock; |
d1310b2e CM |
60 | struct extent_io_ops *ops; |
61 | spinlock_t lru_lock; | |
62 | struct list_head buffer_lru; | |
63 | int lru_size; | |
80ea96b1 | 64 | struct extent_state *last; |
d1310b2e CM |
65 | }; |
66 | ||
67 | struct extent_state { | |
68 | u64 start; | |
69 | u64 end; /* inclusive */ | |
d1310b2e | 70 | struct rb_node rb_node; |
70dec807 | 71 | struct extent_io_tree *tree; |
d1310b2e CM |
72 | wait_queue_head_t wq; |
73 | atomic_t refs; | |
74 | unsigned long state; | |
75 | ||
76 | /* for use by the FS */ | |
77 | u64 private; | |
78 | ||
2d2ae547 | 79 | struct list_head leak_list; |
d1310b2e CM |
80 | }; |
81 | ||
82 | struct extent_buffer { | |
83 | u64 start; | |
84 | unsigned long len; | |
85 | char *map_token; | |
86 | char *kaddr; | |
87 | unsigned long map_start; | |
88 | unsigned long map_len; | |
89 | struct page *first_page; | |
90 | struct list_head lru; | |
91 | atomic_t refs; | |
92 | int flags; | |
2d2ae547 | 93 | struct list_head leak_list; |
d1310b2e CM |
94 | }; |
95 | ||
96 | struct extent_map_tree; | |
97 | ||
d7fc640e CM |
98 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
99 | { | |
100 | struct rb_node *node; | |
101 | node = rb_next(&state->rb_node); | |
102 | if (!node) | |
103 | return NULL; | |
104 | return rb_entry(node, struct extent_state, rb_node); | |
105 | } | |
106 | ||
d1310b2e CM |
107 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
108 | struct page *page, | |
109 | size_t page_offset, | |
110 | u64 start, u64 len, | |
111 | int create); | |
112 | ||
113 | void extent_io_tree_init(struct extent_io_tree *tree, | |
114 | struct address_space *mapping, gfp_t mask); | |
115 | void extent_io_tree_empty_lru(struct extent_io_tree *tree); | |
116 | int try_release_extent_mapping(struct extent_map_tree *map, | |
70dec807 CM |
117 | struct extent_io_tree *tree, struct page *page, |
118 | gfp_t mask); | |
7b13b7b1 CM |
119 | int try_release_extent_state(struct extent_map_tree *map, |
120 | struct extent_io_tree *tree, struct page *page, | |
121 | gfp_t mask); | |
d1310b2e CM |
122 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
123 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); | |
124 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, | |
125 | get_extent_t *get_extent); | |
126 | int __init extent_io_init(void); | |
127 | void extent_io_exit(void); | |
128 | ||
129 | u64 count_range_bits(struct extent_io_tree *tree, | |
130 | u64 *start, u64 search_end, | |
131 | u64 max_bytes, unsigned long bits); | |
132 | ||
133 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, | |
134 | int bits, int filled); | |
135 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, | |
136 | int bits, gfp_t mask); | |
e6dcd2dc CM |
137 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
138 | int bits, int wake, int delete, gfp_t mask); | |
d1310b2e CM |
139 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
140 | int bits, gfp_t mask); | |
141 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, | |
142 | gfp_t mask); | |
143 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, | |
144 | gfp_t mask); | |
145 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
146 | gfp_t mask); | |
147 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
148 | gfp_t mask); | |
e6dcd2dc CM |
149 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
150 | gfp_t mask); | |
151 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, | |
152 | u64 end, gfp_t mask); | |
d1310b2e CM |
153 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
154 | gfp_t mask); | |
e6dcd2dc CM |
155 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
156 | gfp_t mask); | |
d1310b2e CM |
157 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
158 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
159 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
160 | u64 start, int bits); | |
d1310b2e CM |
161 | int extent_invalidatepage(struct extent_io_tree *tree, |
162 | struct page *page, unsigned long offset); | |
163 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
164 | get_extent_t *get_extent, | |
165 | struct writeback_control *wbc); | |
166 | int extent_writepages(struct extent_io_tree *tree, | |
167 | struct address_space *mapping, | |
168 | get_extent_t *get_extent, | |
169 | struct writeback_control *wbc); | |
170 | int extent_readpages(struct extent_io_tree *tree, | |
171 | struct address_space *mapping, | |
172 | struct list_head *pages, unsigned nr_pages, | |
173 | get_extent_t get_extent); | |
174 | int extent_prepare_write(struct extent_io_tree *tree, | |
175 | struct inode *inode, struct page *page, | |
176 | unsigned from, unsigned to, get_extent_t *get_extent); | |
177 | int extent_commit_write(struct extent_io_tree *tree, | |
178 | struct inode *inode, struct page *page, | |
179 | unsigned from, unsigned to); | |
180 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, | |
181 | get_extent_t *get_extent); | |
182 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); | |
183 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); | |
184 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
185 | void set_page_extent_mapped(struct page *page); | |
186 | ||
187 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
188 | u64 start, unsigned long len, | |
189 | struct page *page0, | |
190 | gfp_t mask); | |
191 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, | |
192 | u64 start, unsigned long len, | |
193 | gfp_t mask); | |
194 | void free_extent_buffer(struct extent_buffer *eb); | |
195 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 196 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 197 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
198 | |
199 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
200 | { | |
201 | atomic_inc(&eb->refs); | |
202 | } | |
203 | ||
204 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
205 | unsigned long start, | |
206 | unsigned long len); | |
207 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
208 | unsigned long start, | |
209 | unsigned long len); | |
210 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
211 | unsigned long start, unsigned long len); | |
212 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
213 | unsigned long dst_offset, unsigned long src_offset, | |
214 | unsigned long len); | |
215 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
216 | unsigned long src_offset, unsigned long len); | |
217 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
218 | unsigned long src_offset, unsigned long len); | |
219 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
220 | unsigned long start, unsigned long len); | |
221 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, | |
222 | struct extent_buffer *eb); | |
e6dcd2dc CM |
223 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
224 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); | |
d1310b2e CM |
225 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
226 | struct extent_buffer *eb); | |
227 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
228 | struct extent_buffer *eb); | |
229 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
230 | struct extent_buffer *eb); | |
1259ab75 CM |
231 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
232 | struct extent_buffer *eb); | |
d1310b2e CM |
233 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
234 | struct extent_buffer *eb); | |
235 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
236 | unsigned long min_len, char **token, char **map, | |
237 | unsigned long *map_start, | |
238 | unsigned long *map_len, int km); | |
239 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
240 | unsigned long min_len, char **token, char **map, | |
241 | unsigned long *map_start, | |
242 | unsigned long *map_len, int km); | |
243 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); | |
728131d8 CM |
244 | int invalidate_extent_lru(struct extent_io_tree *tree, u64 start, |
245 | unsigned long len); | |
ce9adaa5 CM |
246 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
247 | int extent_range_uptodate(struct extent_io_tree *tree, | |
248 | u64 start, u64 end); | |
d1310b2e | 249 | #endif |