projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 0939b0e5 AG |
1 | #ifndef __DRBD_INTERVAL_H |
| 2 | #define __DRBD_INTERVAL_H | |
| 3 | ||
| 4 | #include <linux/types.h> | |
| 5 | #include <linux/rbtree.h> | |
| 6 | ||
| 7 | struct drbd_interval { | |
| 8 | struct rb_node rb; | |
| 9 | sector_t sector; /* start sector of the interval */ | |
| 10 | unsigned int size; /* size in bytes */ | |
| 11 | sector_t end; /* highest interval end in subtree */ | |
| 5e472264 | 12 | int local:1 /* local or remote request? */; |
| 53840641 | 13 | int waiting:1; |
| 0939b0e5 AG |
14 | }; |
| 15 | ||
| 16 | static inline void drbd_clear_interval(struct drbd_interval *i) | |
| 17 | { | |
| 18 | RB_CLEAR_NODE(&i->rb); | |
| 19 | } | |
| 20 | ||
| 21 | static inline bool drbd_interval_empty(struct drbd_interval *i) | |
| 22 | { | |
| 23 | return RB_EMPTY_NODE(&i->rb); | |
| 24 | } | |
| 25 | ||
| d0e22a26 AG |
26 | extern bool drbd_insert_interval(struct rb_root *, struct drbd_interval *); |
| 27 | extern bool drbd_contains_interval(struct rb_root *, sector_t, | |
| 28 | struct drbd_interval *); | |
| 29 | extern void drbd_remove_interval(struct rb_root *, struct drbd_interval *); | |
| 30 | extern struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t, | |
| 0939b0e5 | 31 | unsigned int); |
| d0e22a26 AG |
32 | extern struct drbd_interval *drbd_next_overlap(struct drbd_interval *, sector_t, |
| 33 | unsigned int); | |
| 34 | ||
| 35 | #define drbd_for_each_overlap(i, root, sector, size) \ | |
| 36 | for (i = drbd_find_overlap(root, sector, size); \ | |
| 37 | i; \ | |
| 38 | i = drbd_next_overlap(i, sector, size)) | |
| 0939b0e5 AG |
39 | |
| 40 | #endif /* __DRBD_INTERVAL_H */ |