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) | |
e6dcd2dc CM |
16 | #define EXTENT_ORDERED (1 << 9) |
17 | #define EXTENT_ORDERED_METADATA (1 << 10) | |
5b21f2ed | 18 | #define EXTENT_BOUNDARY (1 << 11) |
17d217fe | 19 | #define EXTENT_NODATASUM (1 << 12) |
d1310b2e CM |
20 | #define EXTENT_IOBITS (EXTENT_LOCKED | EXTENT_WRITEBACK) |
21 | ||
c8b97818 CM |
22 | /* flags for bio submission */ |
23 | #define EXTENT_BIO_COMPRESSED 1 | |
24 | ||
b4ce94de CM |
25 | /* these are bit numbers for test/set bit */ |
26 | #define EXTENT_BUFFER_UPTODATE 0 | |
27 | #define EXTENT_BUFFER_BLOCKING 1 | |
28 | ||
d1310b2e CM |
29 | /* |
30 | * page->private values. Every page that is controlled by the extent | |
31 | * map has page->private set to one. | |
32 | */ | |
33 | #define EXTENT_PAGE_PRIVATE 1 | |
34 | #define EXTENT_PAGE_PRIVATE_FIRST_PAGE 3 | |
35 | ||
70dec807 CM |
36 | struct extent_state; |
37 | ||
44b8bd7e | 38 | typedef int (extent_submit_bio_hook_t)(struct inode *inode, int rw, |
c8b97818 CM |
39 | struct bio *bio, int mirror_num, |
40 | unsigned long bio_flags); | |
d1310b2e | 41 | struct extent_io_ops { |
c8b97818 | 42 | int (*fill_delalloc)(struct inode *inode, struct page *locked_page, |
771ed689 CM |
43 | u64 start, u64 end, int *page_started, |
44 | unsigned long *nr_written); | |
247e743c | 45 | int (*writepage_start_hook)(struct page *page, u64 start, u64 end); |
d1310b2e | 46 | int (*writepage_io_hook)(struct page *page, u64 start, u64 end); |
44b8bd7e | 47 | extent_submit_bio_hook_t *submit_bio_hook; |
239b14b3 | 48 | int (*merge_bio_hook)(struct page *page, unsigned long offset, |
c8b97818 CM |
49 | size_t size, struct bio *bio, |
50 | unsigned long bio_flags); | |
d1310b2e | 51 | int (*readpage_io_hook)(struct page *page, u64 start, u64 end); |
7e38326f CM |
52 | int (*readpage_io_failed_hook)(struct bio *bio, struct page *page, |
53 | u64 start, u64 end, | |
54 | struct extent_state *state); | |
1259ab75 CM |
55 | int (*writepage_io_failed_hook)(struct bio *bio, struct page *page, |
56 | u64 start, u64 end, | |
57 | struct extent_state *state); | |
70dec807 CM |
58 | int (*readpage_end_io_hook)(struct page *page, u64 start, u64 end, |
59 | struct extent_state *state); | |
1259ab75 | 60 | int (*writepage_end_io_hook)(struct page *page, u64 start, u64 end, |
e6dcd2dc | 61 | struct extent_state *state, int uptodate); |
291d673e | 62 | int (*set_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 63 | unsigned long old, unsigned long bits); |
291d673e | 64 | int (*clear_bit_hook)(struct inode *inode, u64 start, u64 end, |
b0c68f8b | 65 | unsigned long old, unsigned long bits); |
4bef0848 | 66 | int (*write_cache_pages_lock_hook)(struct page *page); |
d1310b2e CM |
67 | }; |
68 | ||
69 | struct extent_io_tree { | |
70 | struct rb_root state; | |
6af118ce | 71 | struct rb_root buffer; |
d1310b2e CM |
72 | struct address_space *mapping; |
73 | u64 dirty_bytes; | |
70dec807 | 74 | spinlock_t lock; |
6af118ce | 75 | spinlock_t buffer_lock; |
d1310b2e | 76 | struct extent_io_ops *ops; |
d1310b2e CM |
77 | }; |
78 | ||
79 | struct extent_state { | |
80 | u64 start; | |
81 | u64 end; /* inclusive */ | |
d1310b2e | 82 | struct rb_node rb_node; |
70dec807 | 83 | struct extent_io_tree *tree; |
d1310b2e CM |
84 | wait_queue_head_t wq; |
85 | atomic_t refs; | |
86 | unsigned long state; | |
87 | ||
88 | /* for use by the FS */ | |
89 | u64 private; | |
90 | ||
2d2ae547 | 91 | struct list_head leak_list; |
d1310b2e CM |
92 | }; |
93 | ||
94 | struct extent_buffer { | |
95 | u64 start; | |
96 | unsigned long len; | |
97 | char *map_token; | |
98 | char *kaddr; | |
99 | unsigned long map_start; | |
100 | unsigned long map_len; | |
101 | struct page *first_page; | |
b4ce94de | 102 | unsigned long bflags; |
d1310b2e | 103 | atomic_t refs; |
2d2ae547 | 104 | struct list_head leak_list; |
6af118ce | 105 | struct rb_node rb_node; |
b4ce94de CM |
106 | |
107 | /* the spinlock is used to protect most operations */ | |
108 | spinlock_t lock; | |
109 | ||
110 | /* | |
111 | * when we keep the lock held while blocking, waiters go onto | |
112 | * the wq | |
113 | */ | |
114 | wait_queue_head_t lock_wq; | |
d1310b2e CM |
115 | }; |
116 | ||
117 | struct extent_map_tree; | |
118 | ||
d7fc640e CM |
119 | static inline struct extent_state *extent_state_next(struct extent_state *state) |
120 | { | |
121 | struct rb_node *node; | |
122 | node = rb_next(&state->rb_node); | |
123 | if (!node) | |
124 | return NULL; | |
125 | return rb_entry(node, struct extent_state, rb_node); | |
126 | } | |
127 | ||
d1310b2e CM |
128 | typedef struct extent_map *(get_extent_t)(struct inode *inode, |
129 | struct page *page, | |
130 | size_t page_offset, | |
131 | u64 start, u64 len, | |
132 | int create); | |
133 | ||
134 | void extent_io_tree_init(struct extent_io_tree *tree, | |
135 | struct address_space *mapping, gfp_t mask); | |
d1310b2e | 136 | int try_release_extent_mapping(struct extent_map_tree *map, |
70dec807 CM |
137 | struct extent_io_tree *tree, struct page *page, |
138 | gfp_t mask); | |
6af118ce | 139 | int try_release_extent_buffer(struct extent_io_tree *tree, struct page *page); |
7b13b7b1 CM |
140 | int try_release_extent_state(struct extent_map_tree *map, |
141 | struct extent_io_tree *tree, struct page *page, | |
142 | gfp_t mask); | |
d1310b2e CM |
143 | int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); |
144 | int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end, gfp_t mask); | |
25179201 JB |
145 | int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, |
146 | gfp_t mask); | |
d1310b2e CM |
147 | int extent_read_full_page(struct extent_io_tree *tree, struct page *page, |
148 | get_extent_t *get_extent); | |
149 | int __init extent_io_init(void); | |
150 | void extent_io_exit(void); | |
151 | ||
152 | u64 count_range_bits(struct extent_io_tree *tree, | |
153 | u64 *start, u64 search_end, | |
154 | u64 max_bytes, unsigned long bits); | |
155 | ||
156 | int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, | |
157 | int bits, int filled); | |
158 | int clear_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, | |
159 | int bits, gfp_t mask); | |
e6dcd2dc CM |
160 | int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
161 | int bits, int wake, int delete, gfp_t mask); | |
d1310b2e CM |
162 | int set_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
163 | int bits, gfp_t mask); | |
164 | int set_extent_uptodate(struct extent_io_tree *tree, u64 start, u64 end, | |
165 | gfp_t mask); | |
166 | int set_extent_new(struct extent_io_tree *tree, u64 start, u64 end, | |
167 | gfp_t mask); | |
168 | int set_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
169 | gfp_t mask); | |
170 | int clear_extent_dirty(struct extent_io_tree *tree, u64 start, u64 end, | |
171 | gfp_t mask); | |
e6dcd2dc CM |
172 | int clear_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
173 | gfp_t mask); | |
174 | int clear_extent_ordered_metadata(struct extent_io_tree *tree, u64 start, | |
175 | u64 end, gfp_t mask); | |
d1310b2e CM |
176 | int set_extent_delalloc(struct extent_io_tree *tree, u64 start, u64 end, |
177 | gfp_t mask); | |
e6dcd2dc CM |
178 | int set_extent_ordered(struct extent_io_tree *tree, u64 start, u64 end, |
179 | gfp_t mask); | |
d1310b2e CM |
180 | int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
181 | u64 *start_ret, u64 *end_ret, int bits); | |
d7fc640e CM |
182 | struct extent_state *find_first_extent_bit_state(struct extent_io_tree *tree, |
183 | u64 start, int bits); | |
d1310b2e CM |
184 | int extent_invalidatepage(struct extent_io_tree *tree, |
185 | struct page *page, unsigned long offset); | |
186 | int extent_write_full_page(struct extent_io_tree *tree, struct page *page, | |
187 | get_extent_t *get_extent, | |
188 | struct writeback_control *wbc); | |
771ed689 CM |
189 | int extent_write_locked_range(struct extent_io_tree *tree, struct inode *inode, |
190 | u64 start, u64 end, get_extent_t *get_extent, | |
191 | int mode); | |
d1310b2e CM |
192 | int extent_writepages(struct extent_io_tree *tree, |
193 | struct address_space *mapping, | |
194 | get_extent_t *get_extent, | |
195 | struct writeback_control *wbc); | |
196 | int extent_readpages(struct extent_io_tree *tree, | |
197 | struct address_space *mapping, | |
198 | struct list_head *pages, unsigned nr_pages, | |
199 | get_extent_t get_extent); | |
200 | int extent_prepare_write(struct extent_io_tree *tree, | |
201 | struct inode *inode, struct page *page, | |
202 | unsigned from, unsigned to, get_extent_t *get_extent); | |
203 | int extent_commit_write(struct extent_io_tree *tree, | |
204 | struct inode *inode, struct page *page, | |
205 | unsigned from, unsigned to); | |
206 | sector_t extent_bmap(struct address_space *mapping, sector_t iblock, | |
207 | get_extent_t *get_extent); | |
1506fcc8 YS |
208 | int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo, |
209 | __u64 start, __u64 len, get_extent_t *get_extent); | |
d1310b2e CM |
210 | int set_range_dirty(struct extent_io_tree *tree, u64 start, u64 end); |
211 | int set_state_private(struct extent_io_tree *tree, u64 start, u64 private); | |
212 | int get_state_private(struct extent_io_tree *tree, u64 start, u64 *private); | |
213 | void set_page_extent_mapped(struct page *page); | |
214 | ||
215 | struct extent_buffer *alloc_extent_buffer(struct extent_io_tree *tree, | |
216 | u64 start, unsigned long len, | |
217 | struct page *page0, | |
218 | gfp_t mask); | |
219 | struct extent_buffer *find_extent_buffer(struct extent_io_tree *tree, | |
220 | u64 start, unsigned long len, | |
221 | gfp_t mask); | |
222 | void free_extent_buffer(struct extent_buffer *eb); | |
223 | int read_extent_buffer_pages(struct extent_io_tree *tree, | |
a86c12c7 | 224 | struct extent_buffer *eb, u64 start, int wait, |
f188591e | 225 | get_extent_t *get_extent, int mirror_num); |
d1310b2e CM |
226 | |
227 | static inline void extent_buffer_get(struct extent_buffer *eb) | |
228 | { | |
229 | atomic_inc(&eb->refs); | |
230 | } | |
231 | ||
232 | int memcmp_extent_buffer(struct extent_buffer *eb, const void *ptrv, | |
233 | unsigned long start, | |
234 | unsigned long len); | |
235 | void read_extent_buffer(struct extent_buffer *eb, void *dst, | |
236 | unsigned long start, | |
237 | unsigned long len); | |
238 | void write_extent_buffer(struct extent_buffer *eb, const void *src, | |
239 | unsigned long start, unsigned long len); | |
240 | void copy_extent_buffer(struct extent_buffer *dst, struct extent_buffer *src, | |
241 | unsigned long dst_offset, unsigned long src_offset, | |
242 | unsigned long len); | |
243 | void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
244 | unsigned long src_offset, unsigned long len); | |
245 | void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset, | |
246 | unsigned long src_offset, unsigned long len); | |
247 | void memset_extent_buffer(struct extent_buffer *eb, char c, | |
248 | unsigned long start, unsigned long len); | |
249 | int wait_on_extent_buffer_writeback(struct extent_io_tree *tree, | |
250 | struct extent_buffer *eb); | |
e6dcd2dc CM |
251 | int wait_on_extent_writeback(struct extent_io_tree *tree, u64 start, u64 end); |
252 | int wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, int bits); | |
d1310b2e CM |
253 | int clear_extent_buffer_dirty(struct extent_io_tree *tree, |
254 | struct extent_buffer *eb); | |
255 | int set_extent_buffer_dirty(struct extent_io_tree *tree, | |
256 | struct extent_buffer *eb); | |
257 | int set_extent_buffer_uptodate(struct extent_io_tree *tree, | |
258 | struct extent_buffer *eb); | |
1259ab75 CM |
259 | int clear_extent_buffer_uptodate(struct extent_io_tree *tree, |
260 | struct extent_buffer *eb); | |
d1310b2e CM |
261 | int extent_buffer_uptodate(struct extent_io_tree *tree, |
262 | struct extent_buffer *eb); | |
263 | int map_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
264 | unsigned long min_len, char **token, char **map, | |
265 | unsigned long *map_start, | |
266 | unsigned long *map_len, int km); | |
267 | int map_private_extent_buffer(struct extent_buffer *eb, unsigned long offset, | |
268 | unsigned long min_len, char **token, char **map, | |
269 | unsigned long *map_start, | |
270 | unsigned long *map_len, int km); | |
271 | void unmap_extent_buffer(struct extent_buffer *eb, char *token, int km); | |
ce9adaa5 CM |
272 | int release_extent_buffer_tail_pages(struct extent_buffer *eb); |
273 | int extent_range_uptodate(struct extent_io_tree *tree, | |
274 | u64 start, u64 end); | |
c8b97818 CM |
275 | int extent_clear_unlock_delalloc(struct inode *inode, |
276 | struct extent_io_tree *tree, | |
277 | u64 start, u64 end, struct page *locked_page, | |
771ed689 CM |
278 | int unlock_page, |
279 | int clear_unlock, | |
280 | int clear_delalloc, int clear_dirty, | |
281 | int set_writeback, | |
282 | int end_writeback); | |
d1310b2e | 283 | #endif |