]>
Commit | Line | Data |
---|---|---|
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 | ||
c8b97818 CM |
21 | /* flags for bio submission */ |
22 | #define EXTENT_BIO_COMPRESSED 1 | |
23 | ||
d1310b2e CM |
24 | /* |
25 | * page->private values. Every page that is controlled by the extent | |
26 | * map has page->private set to one. | |
27 | */ | |
28 | #define EXTENT_PAGE_PRIVATE 1 | |
29 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
30 | ||
70dec807 CM |
31 | struct extent_state; |
32 | ||
44b8bd7e | 33 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 CM |
34 | struct bio *bio, int mirror_num, |
35 | unsigned long bio_flags); | |
d1310b2e | 36 | struct extent_io_ops { |
c8b97818 CM |
37 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
38 | u64 start, u64 end, int *page_started); | |
247e743c | 39 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 40 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 41 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 42 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
43 | size_t size, struct bio *bio, |
44 | unsigned long bio_flags); | |
d1310b2e | 45 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
46 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
47 | u64 start, u64 end, | |
48 | struct extent_state *state); | |
1259ab75 CM |
49 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
50 | u64 start, u64 end, | |
51 | struct extent_state *state); | |
70dec807 CM |
52 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
53 | struct extent_state *state); | |
1259ab75 | 54 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 55 | struct extent_state *state, int uptodate); |
291d673e | 56 | int (*set_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 57 | unsigned long old, unsigned long bits); |
291d673e | 58 | int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 59 | unsigned long old, unsigned long bits); |
4bef0848 | 60 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
61 | }; |
62 | ||
63 | struct extent_io_tree { | |
64 | struct rb_root state; | |
6af118ce | 65 | struct rb_root buffer; |
d1310b2e CM |
66 | struct address_space *mapping; |
67 | u64 dirty_bytes; | |
70dec807 | 68 | spinlock_t lock; |
6af118ce | 69 | spinlock_t buffer_lock; |
d1310b2e | 70 | struct extent_io_ops *ops; |
d1310b2e CM |
71 | }; |
72 | ||
73 | struct extent_state { | |
74 | u64 start; | |
75 | u64 end; /* inclusive */ | |
d1310b2e | 76 | struct rb_node rb_node; |
70dec807 | 77 | struct extent_io_tree *tree; |
d1310b2e CM |
78 | wait_queue_head_t wq; |
79 | atomic_t refs; | |
80 | unsigned long state; | |
81 | ||
82 | /* for use by the FS */ | |
83 | u64 private; | |
84 | ||
2d2ae547 | 85 | struct list_head leak_list; |
d1310b2e CM |
86 | }; |
87 | ||
88 | struct extent_buffer { | |
89 | u64 start; | |
90 | unsigned long len; | |
91 | char *map_token; | |
92 | char *kaddr; | |
93 | unsigned long map_start; | |
94 | unsigned long map_len; | |
95 | struct page *first_page; | |
d1310b2e CM |
96 | atomic_t refs; |
97 | int flags; | |
2d2ae547 | 98 | struct list_head leak_list; |
6af118ce | 99 | struct rb_node rb_node; |
a61e6f29 | 100 | struct mutex mutex; |
d1310b2e CM |
101 | }; |
102 | ||
103 | struct extent_map_tree; | |
104 | ||
d7fc640e CM |
105 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
106 | { | |
107 | struct rb_node *node; | |
108 | node = rb_next(&state->rb_node); | |
109 | if (!node) | |
110 | return NULL; | |
111 | return rb_entry(node, struct extent_state, rb_node); | |
112 | } | |
113 | ||
d1310b2e CM |
114 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
115 | struct page *page, | |
116 | size_t page_offset, | |
117 | u64 start, u64 len, | |
118 | int create); | |
119 | ||
120 | void extent_io_tree_init(struct extent_io_tree *tree, | |
121 | struct address_space *mapping, gfp_t mask); | |
d1310b2e | 122 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
123 | struct extent_io_tree *tree, struct page *page, |
124 | gfp_t mask); | |
6af118ce | 125 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
126 | int try_release_extent_state(struct extent_map_tree *map, |
127 | struct extent_io_tree *tree, struct page *page, | |
128 | gfp_t mask); | |
d1310b2e CM |
129 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
130 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); | |
25179201 JB |
131 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
132 | gfp_t mask); | |
d1310b2e CM |
133 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
134 | get_extent_t *get_extent); | |
135 | int __init extent_io_init(void); | |
136 | void extent_io_exit(void); | |
137 | ||
138 | u64 count_range_bits(struct extent_io_tree *tree, | |
139 | u64 *start, u64 search_end, | |
140 | u64 max_bytes, unsigned long bits); | |
141 | ||
142 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, | |
143 | int bits, int filled); | |
144 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, | |
145 | int bits, gfp_t mask); | |
e6dcd2dc CM |
146 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
147 | int bits, int wake, int delete, gfp_t mask); | |
d1310b2e CM |
148 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
149 | int bits, gfp_t mask); | |
150 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, | |
151 | gfp_t mask); | |
152 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, | |
153 | gfp_t mask); | |
154 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
155 | gfp_t mask); | |
156 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
157 | gfp_t mask); | |
e6dcd2dc CM |
158 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
159 | gfp_t mask); | |
160 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, | |
161 | u64 end, gfp_t mask); | |
d1310b2e CM |
162 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
163 | gfp_t mask); | |
e6dcd2dc CM |
164 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
165 | gfp_t mask); | |
d1310b2e CM |
166 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
167 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
168 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
169 | u64 start, int bits); | |
d1310b2e CM |
170 | int extent_invalidatepage(struct extent_io_tree *tree, |
171 | struct page *page, unsigned long offset); | |
172 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
173 | get_extent_t *get_extent, | |
174 | struct writeback_control *wbc); | |
175 | int extent_writepages(struct extent_io_tree *tree, | |
176 | struct address_space *mapping, | |
177 | get_extent_t *get_extent, | |
178 | struct writeback_control *wbc); | |
179 | int extent_readpages(struct extent_io_tree *tree, | |
180 | struct address_space *mapping, | |
181 | struct list_head *pages, unsigned nr_pages, | |
182 | get_extent_t get_extent); | |
183 | int extent_prepare_write(struct extent_io_tree *tree, | |
184 | struct inode *inode, struct page *page, | |
185 | unsigned from, unsigned to, get_extent_t *get_extent); | |
186 | int extent_commit_write(struct extent_io_tree *tree, | |
187 | struct inode *inode, struct page *page, | |
188 | unsigned from, unsigned to); | |
189 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, | |
190 | get_extent_t *get_extent); | |
191 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); | |
192 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); | |
193 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
194 | void set_page_extent_mapped(struct page *page); | |
195 | ||
196 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
197 | u64 start, unsigned long len, | |
198 | struct page *page0, | |
199 | gfp_t mask); | |
200 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, | |
201 | u64 start, unsigned long len, | |
202 | gfp_t mask); | |
203 | void free_extent_buffer(struct extent_buffer *eb); | |
204 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 205 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 206 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
207 | |
208 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
209 | { | |
210 | atomic_inc(&eb->refs); | |
211 | } | |
212 | ||
213 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
214 | unsigned long start, | |
215 | unsigned long len); | |
216 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
217 | unsigned long start, | |
218 | unsigned long len); | |
219 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
220 | unsigned long start, unsigned long len); | |
221 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
222 | unsigned long dst_offset, unsigned long src_offset, | |
223 | unsigned long len); | |
224 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
225 | unsigned long src_offset, unsigned long len); | |
226 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
227 | unsigned long src_offset, unsigned long len); | |
228 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
229 | unsigned long start, unsigned long len); | |
230 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, | |
231 | struct extent_buffer *eb); | |
e6dcd2dc CM |
232 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
233 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); | |
d1310b2e CM |
234 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
235 | struct extent_buffer *eb); | |
236 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
237 | struct extent_buffer *eb); | |
238 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
239 | struct extent_buffer *eb); | |
1259ab75 CM |
240 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
241 | struct extent_buffer *eb); | |
d1310b2e CM |
242 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
243 | struct extent_buffer *eb); | |
244 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
245 | unsigned long min_len, char **token, char **map, | |
246 | unsigned long *map_start, | |
247 | unsigned long *map_len, int km); | |
248 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
249 | unsigned long min_len, char **token, char **map, | |
250 | unsigned long *map_start, | |
251 | unsigned long *map_len, int km); | |
252 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); | |
ce9adaa5 CM |
253 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
254 | int extent_range_uptodate(struct extent_io_tree *tree, | |
255 | u64 start, u64 end); | |
c8b97818 CM |
256 | int extent_clear_unlock_delalloc(struct inode *inode, |
257 | struct extent_io_tree *tree, | |
258 | u64 start, u64 end, struct page *locked_page, | |
259 | int clear_dirty, int set_writeback, | |
260 | int clear_writeback); | |
d1310b2e | 261 | #endif |