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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) | |
5b21f2ed | 18 | #define EXTENT_BOUNDARY (1 << 11) |
d1310b2e CM |
19 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
20 | ||
21 | /* | |
22 | * page->private values. Every page that is controlled by the extent | |
23 | * map has page->private set to one. | |
24 | */ | |
25 | #define EXTENT_PAGE_PRIVATE 1 | |
26 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
27 | ||
70dec807 CM |
28 | struct extent_state; |
29 | ||
44b8bd7e CM |
30 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
31 | struct bio *bio, int mirror_num); | |
d1310b2e CM |
32 | struct extent_io_ops { |
33 | int (*fill_delalloc)(struct inode *inode, u64 start, u64 end); | |
247e743c | 34 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 35 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 36 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 CM |
37 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
38 | size_t size, struct bio *bio); | |
d1310b2e | 39 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
40 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
41 | u64 start, u64 end, | |
42 | struct extent_state *state); | |
1259ab75 CM |
43 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
44 | u64 start, u64 end, | |
45 | struct extent_state *state); | |
70dec807 CM |
46 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
47 | struct extent_state *state); | |
1259ab75 | 48 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 49 | struct extent_state *state, int uptodate); |
291d673e | 50 | int (*set_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 51 | unsigned long old, unsigned long bits); |
291d673e | 52 | int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 53 | unsigned long old, unsigned long bits); |
4bef0848 | 54 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
55 | }; |
56 | ||
57 | struct extent_io_tree { | |
58 | struct rb_root state; | |
6af118ce | 59 | struct rb_root buffer; |
d1310b2e CM |
60 | struct address_space *mapping; |
61 | u64 dirty_bytes; | |
70dec807 | 62 | spinlock_t lock; |
6af118ce | 63 | spinlock_t buffer_lock; |
d1310b2e | 64 | struct extent_io_ops *ops; |
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; | |
d1310b2e CM |
90 | atomic_t refs; |
91 | int flags; | |
2d2ae547 | 92 | struct list_head leak_list; |
6af118ce | 93 | struct rb_node rb_node; |
a61e6f29 | 94 | struct mutex mutex; |
d1310b2e CM |
95 | }; |
96 | ||
97 | struct extent_map_tree; | |
98 | ||
d7fc640e CM |
99 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
100 | { | |
101 | struct rb_node *node; | |
102 | node = rb_next(&state->rb_node); | |
103 | if (!node) | |
104 | return NULL; | |
105 | return rb_entry(node, struct extent_state, rb_node); | |
106 | } | |
107 | ||
d1310b2e CM |
108 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
109 | struct page *page, | |
110 | size_t page_offset, | |
111 | u64 start, u64 len, | |
112 | int create); | |
113 | ||
114 | void extent_io_tree_init(struct extent_io_tree *tree, | |
115 | struct address_space *mapping, gfp_t mask); | |
d1310b2e | 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); | |
6af118ce | 119 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
120 | int try_release_extent_state(struct extent_map_tree *map, |
121 | struct extent_io_tree *tree, struct page *page, | |
122 | gfp_t mask); | |
d1310b2e CM |
123 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
124 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); | |
125 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, | |
126 | get_extent_t *get_extent); | |
127 | int __init extent_io_init(void); | |
128 | void extent_io_exit(void); | |
129 | ||
130 | u64 count_range_bits(struct extent_io_tree *tree, | |
131 | u64 *start, u64 search_end, | |
132 | u64 max_bytes, unsigned long bits); | |
133 | ||
134 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, | |
135 | int bits, int filled); | |
136 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, | |
137 | int bits, gfp_t mask); | |
e6dcd2dc CM |
138 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
139 | int bits, int wake, int delete, gfp_t mask); | |
d1310b2e CM |
140 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
141 | int bits, gfp_t mask); | |
142 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, | |
143 | gfp_t mask); | |
144 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, | |
145 | gfp_t mask); | |
146 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
147 | gfp_t mask); | |
148 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
149 | gfp_t mask); | |
e6dcd2dc CM |
150 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
151 | gfp_t mask); | |
152 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, | |
153 | u64 end, gfp_t mask); | |
d1310b2e CM |
154 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
155 | gfp_t mask); | |
e6dcd2dc CM |
156 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
157 | gfp_t mask); | |
d1310b2e CM |
158 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
159 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
160 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
161 | u64 start, int bits); | |
d1310b2e CM |
162 | int extent_invalidatepage(struct extent_io_tree *tree, |
163 | struct page *page, unsigned long offset); | |
164 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
165 | get_extent_t *get_extent, | |
166 | struct writeback_control *wbc); | |
167 | int extent_writepages(struct extent_io_tree *tree, | |
168 | struct address_space *mapping, | |
169 | get_extent_t *get_extent, | |
170 | struct writeback_control *wbc); | |
171 | int extent_readpages(struct extent_io_tree *tree, | |
172 | struct address_space *mapping, | |
173 | struct list_head *pages, unsigned nr_pages, | |
174 | get_extent_t get_extent); | |
175 | int extent_prepare_write(struct extent_io_tree *tree, | |
176 | struct inode *inode, struct page *page, | |
177 | unsigned from, unsigned to, get_extent_t *get_extent); | |
178 | int extent_commit_write(struct extent_io_tree *tree, | |
179 | struct inode *inode, struct page *page, | |
180 | unsigned from, unsigned to); | |
181 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, | |
182 | get_extent_t *get_extent); | |
183 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); | |
184 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); | |
185 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
186 | void set_page_extent_mapped(struct page *page); | |
187 | ||
188 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
189 | u64 start, unsigned long len, | |
190 | struct page *page0, | |
191 | gfp_t mask); | |
192 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, | |
193 | u64 start, unsigned long len, | |
194 | gfp_t mask); | |
195 | void free_extent_buffer(struct extent_buffer *eb); | |
196 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 197 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 198 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
199 | |
200 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
201 | { | |
202 | atomic_inc(&eb->refs); | |
203 | } | |
204 | ||
205 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
206 | unsigned long start, | |
207 | unsigned long len); | |
208 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
209 | unsigned long start, | |
210 | unsigned long len); | |
211 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
212 | unsigned long start, unsigned long len); | |
213 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
214 | unsigned long dst_offset, unsigned long src_offset, | |
215 | unsigned long len); | |
216 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
217 | unsigned long src_offset, unsigned long len); | |
218 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
219 | unsigned long src_offset, unsigned long len); | |
220 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
221 | unsigned long start, unsigned long len); | |
222 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, | |
223 | struct extent_buffer *eb); | |
e6dcd2dc CM |
224 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
225 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); | |
d1310b2e CM |
226 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
227 | struct extent_buffer *eb); | |
228 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
229 | struct extent_buffer *eb); | |
230 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
231 | struct extent_buffer *eb); | |
1259ab75 CM |
232 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
233 | struct extent_buffer *eb); | |
d1310b2e CM |
234 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
235 | struct extent_buffer *eb); | |
236 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
237 | unsigned long min_len, char **token, char **map, | |
238 | unsigned long *map_start, | |
239 | unsigned long *map_len, int km); | |
240 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
241 | unsigned long min_len, char **token, char **map, | |
242 | unsigned long *map_start, | |
243 | unsigned long *map_len, int km); | |
244 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); | |
ce9adaa5 CM |
245 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
246 | int extent_range_uptodate(struct extent_io_tree *tree, | |
247 | u64 start, u64 end); | |
d1310b2e | 248 | #endif |