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Linux kernel mirror (for testing)
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kernel
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linux
1#ifndef __DRBD_INTERVAL_H
2#define __DRBD_INTERVAL_H
3
4#include <linux/types.h>
5#include <linux/rbtree.h>
6
7struct 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 */
12 int local:1 /* local or remote request? */;
13 int waiting:1;
14};
15
16static inline void drbd_clear_interval(struct drbd_interval *i)
17{
18 RB_CLEAR_NODE(&i->rb);
19}
20
21static inline bool drbd_interval_empty(struct drbd_interval *i)
22{
23 return RB_EMPTY_NODE(&i->rb);
24}
25
26extern bool drbd_insert_interval(struct rb_root *, struct drbd_interval *);
27extern bool drbd_contains_interval(struct rb_root *, sector_t,
28 struct drbd_interval *);
29extern void drbd_remove_interval(struct rb_root *, struct drbd_interval *);
30extern struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t,
31 unsigned int);
32extern 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))
39
40#endif /* __DRBD_INTERVAL_H */