Commit | Line | Data |
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a52d9a80 CM |
1 | #ifndef __EXTENTMAP__ |
2 | #define __EXTENTMAP__ | |
3 | ||
4 | #include <linux/rbtree.h> | |
5 | ||
5f39d397 | 6 | #define EXTENT_MAP_HOLE (u64)-3 |
a52d9a80 CM |
7 | #define EXTENT_MAP_INLINE (u64)-2 |
8 | #define EXTENT_MAP_DELALLOC (u64)-1 | |
9 | ||
5f39d397 CM |
10 | /* bits for the extent state */ |
11 | #define EXTENT_DIRTY 1 | |
12 | #define EXTENT_WRITEBACK (1 << 1) | |
13 | #define EXTENT_UPTODATE (1 << 2) | |
14 | #define EXTENT_LOCKED (1 << 3) | |
15 | #define EXTENT_NEW (1 << 4) | |
16 | #define EXTENT_DELALLOC (1 << 5) | |
6b80053d CM |
17 | #define EXTENT_DEFRAG (1 << 6) |
18 | #define EXTENT_DEFRAG_DONE (1 << 7) | |
4dc11904 | 19 | #define EXTENT_BUFFER_FILLED (1 << 8) |
19c00ddc | 20 | #define EXTENT_CSUM (1 << 9) |
5f39d397 CM |
21 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
22 | ||
19c00ddc CM |
23 | /* |
24 | * page->private values. Every page that is controlled by the extent | |
25 | * map has page->private set to one. | |
26 | */ | |
19c00ddc CM |
27 | #define EXTENT_PAGE_PRIVATE 1 |
28 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
29 | ||
5f39d397 | 30 | |
07157aac CM |
31 | struct extent_map_ops { |
32 | int (*fill_delalloc)(struct inode *inode, u64 start, u64 end); | |
33 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); | |
34 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); | |
35 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end); | |
0e2752a7 | 36 | void (*writepage_end_io_hook)(struct page *page, u64 start, u64 end); |
07157aac CM |
37 | }; |
38 | ||
a52d9a80 CM |
39 | struct extent_map_tree { |
40 | struct rb_root map; | |
41 | struct rb_root state; | |
42 | struct address_space *mapping; | |
43 | rwlock_t lock; | |
07157aac | 44 | struct extent_map_ops *ops; |
4dc11904 CM |
45 | spinlock_t lru_lock; |
46 | struct list_head buffer_lru; | |
47 | int lru_size; | |
a52d9a80 CM |
48 | }; |
49 | ||
50 | /* note, this must start with the same fields as fs/extent_map.c:tree_entry */ | |
51 | struct extent_map { | |
52 | u64 start; | |
53 | u64 end; /* inclusive */ | |
54 | int in_tree; | |
55 | struct rb_node rb_node; | |
56 | /* block_start and block_end are in bytes */ | |
57 | u64 block_start; | |
58 | u64 block_end; /* inclusive */ | |
59 | struct block_device *bdev; | |
60 | atomic_t refs; | |
61 | }; | |
62 | ||
63 | /* note, this must start with the same fields as fs/extent_map.c:tree_entry */ | |
64 | struct extent_state { | |
65 | u64 start; | |
66 | u64 end; /* inclusive */ | |
67 | int in_tree; | |
68 | struct rb_node rb_node; | |
69 | wait_queue_head_t wq; | |
70 | atomic_t refs; | |
71 | unsigned long state; | |
07157aac CM |
72 | |
73 | /* for use by the FS */ | |
74 | u64 private; | |
75 | ||
a52d9a80 CM |
76 | struct list_head list; |
77 | }; | |
78 | ||
79 | struct extent_buffer { | |
80 | u64 start; | |
5f39d397 | 81 | unsigned long len; |
db94535d CM |
82 | char *map_token; |
83 | char *kaddr; | |
84 | unsigned long map_start; | |
85 | unsigned long map_len; | |
810191ff | 86 | struct page *first_page; |
4dc11904 CM |
87 | struct list_head lru; |
88 | atomic_t refs; | |
89 | int flags; | |
a52d9a80 CM |
90 | }; |
91 | ||
92 | typedef struct extent_map *(get_extent_t)(struct inode *inode, | |
93 | struct page *page, | |
94 | size_t page_offset, | |
95 | u64 start, u64 end, | |
96 | int create); | |
97 | ||
98 | void extent_map_tree_init(struct extent_map_tree *tree, | |
99 | struct address_space *mapping, gfp_t mask); | |
19c00ddc | 100 | void extent_map_tree_empty_lru(struct extent_map_tree *tree); |
a52d9a80 CM |
101 | struct extent_map *lookup_extent_mapping(struct extent_map_tree *tree, |
102 | u64 start, u64 end); | |
103 | int add_extent_mapping(struct extent_map_tree *tree, | |
104 | struct extent_map *em); | |
105 | int remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em); | |
106 | int try_release_extent_mapping(struct extent_map_tree *tree, struct page *page); | |
107 | int lock_extent(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask); | |
108 | int unlock_extent(struct extent_map_tree *tree, u64 start, u64 end, gfp_t mask); | |
109 | struct extent_map *alloc_extent_map(gfp_t mask); | |
110 | void free_extent_map(struct extent_map *em); | |
111 | int extent_read_full_page(struct extent_map_tree *tree, struct page *page, | |
112 | get_extent_t *get_extent); | |
113 | void __init extent_map_init(void); | |
114 | void __exit extent_map_exit(void); | |
1a5bc167 CM |
115 | |
116 | int test_range_bit(struct extent_map_tree *tree, u64 start, u64 end, | |
117 | int bits, int filled); | |
96b5179d CM |
118 | int clear_extent_bits(struct extent_map_tree *tree, u64 start, u64 end, |
119 | int bits, gfp_t mask); | |
120 | int set_extent_bits(struct extent_map_tree *tree, u64 start, u64 end, | |
121 | int bits, gfp_t mask); | |
a52d9a80 CM |
122 | int set_extent_uptodate(struct extent_map_tree *tree, u64 start, u64 end, |
123 | gfp_t mask); | |
124 | int set_extent_new(struct extent_map_tree *tree, u64 start, u64 end, | |
125 | gfp_t mask); | |
126 | int set_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end, | |
127 | gfp_t mask); | |
5f39d397 CM |
128 | int clear_extent_dirty(struct extent_map_tree *tree, u64 start, u64 end, |
129 | gfp_t mask); | |
b888db2b CM |
130 | int set_extent_delalloc(struct extent_map_tree *tree, u64 start, u64 end, |
131 | gfp_t mask); | |
5f39d397 CM |
132 | int find_first_extent_bit(struct extent_map_tree *tree, u64 start, |
133 | u64 *start_ret, u64 *end_ret, int bits); | |
a52d9a80 CM |
134 | int extent_invalidatepage(struct extent_map_tree *tree, |
135 | struct page *page, unsigned long offset); | |
136 | int extent_write_full_page(struct extent_map_tree *tree, struct page *page, | |
137 | get_extent_t *get_extent, | |
138 | struct writeback_control *wbc); | |
b293f02e CM |
139 | int extent_writepages(struct extent_map_tree *tree, |
140 | struct address_space *mapping, | |
141 | get_extent_t *get_extent, | |
142 | struct writeback_control *wbc); | |
3ab2fb5a CM |
143 | int extent_readpages(struct extent_map_tree *tree, |
144 | struct address_space *mapping, | |
145 | struct list_head *pages, unsigned nr_pages, | |
146 | get_extent_t get_extent); | |
a52d9a80 CM |
147 | int extent_prepare_write(struct extent_map_tree *tree, |
148 | struct inode *inode, struct page *page, | |
149 | unsigned from, unsigned to, get_extent_t *get_extent); | |
150 | int extent_commit_write(struct extent_map_tree *tree, | |
151 | struct inode *inode, struct page *page, | |
152 | unsigned from, unsigned to); | |
d396c6f5 CH |
153 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, |
154 | get_extent_t *get_extent); | |
a52d9a80 | 155 | int set_range_dirty(struct extent_map_tree *tree, u64 start, u64 end); |
07157aac CM |
156 | int set_state_private(struct extent_map_tree *tree, u64 start, u64 private); |
157 | int get_state_private(struct extent_map_tree *tree, u64 start, u64 *private); | |
b3cfa35a | 158 | void set_page_extent_mapped(struct page *page); |
5f39d397 CM |
159 | |
160 | struct extent_buffer *alloc_extent_buffer(struct extent_map_tree *tree, | |
161 | u64 start, unsigned long len, | |
19c00ddc | 162 | struct page *page0, |
5f39d397 CM |
163 | gfp_t mask); |
164 | struct extent_buffer *find_extent_buffer(struct extent_map_tree *tree, | |
165 | u64 start, unsigned long len, | |
166 | gfp_t mask); | |
167 | void free_extent_buffer(struct extent_buffer *eb); | |
168 | int read_extent_buffer_pages(struct extent_map_tree *tree, | |
19c00ddc | 169 | struct extent_buffer *eb, u64 start, int wait); |
5f39d397 CM |
170 | |
171 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
172 | { | |
173 | atomic_inc(&eb->refs); | |
174 | } | |
175 | ||
5f39d397 CM |
176 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, |
177 | unsigned long start, | |
178 | unsigned long len); | |
179 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
180 | unsigned long start, | |
181 | unsigned long len); | |
182 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
183 | unsigned long start, unsigned long len); | |
184 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
185 | unsigned long dst_offset, unsigned long src_offset, | |
186 | unsigned long len); | |
187 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
188 | unsigned long src_offset, unsigned long len); | |
189 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
190 | unsigned long src_offset, unsigned long len); | |
191 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
192 | unsigned long start, unsigned long len); | |
193 | int wait_on_extent_buffer_writeback(struct extent_map_tree *tree, | |
194 | struct extent_buffer *eb); | |
195 | int clear_extent_buffer_dirty(struct extent_map_tree *tree, | |
196 | struct extent_buffer *eb); | |
197 | int set_extent_buffer_dirty(struct extent_map_tree *tree, | |
198 | struct extent_buffer *eb); | |
199 | int set_extent_buffer_uptodate(struct extent_map_tree *tree, | |
200 | struct extent_buffer *eb); | |
201 | int extent_buffer_uptodate(struct extent_map_tree *tree, | |
202 | struct extent_buffer *eb); | |
203 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
479965d6 | 204 | unsigned long min_len, char **token, char **map, |
5f39d397 CM |
205 | unsigned long *map_start, |
206 | unsigned long *map_len, int km); | |
19c00ddc CM |
207 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, |
208 | unsigned long min_len, char **token, char **map, | |
209 | unsigned long *map_start, | |
210 | unsigned long *map_len, int km); | |
5f39d397 | 211 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); |
a52d9a80 | 212 | #endif |