1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __DRBD_INTERVAL_H
3*4882a593Smuzhiyun #define __DRBD_INTERVAL_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/types.h>
6*4882a593Smuzhiyun #include <linux/rbtree.h>
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun struct drbd_interval {
9*4882a593Smuzhiyun struct rb_node rb;
10*4882a593Smuzhiyun sector_t sector; /* start sector of the interval */
11*4882a593Smuzhiyun unsigned int size; /* size in bytes */
12*4882a593Smuzhiyun sector_t end; /* highest interval end in subtree */
13*4882a593Smuzhiyun unsigned int local:1 /* local or remote request? */;
14*4882a593Smuzhiyun unsigned int waiting:1; /* someone is waiting for completion */
15*4882a593Smuzhiyun unsigned int completed:1; /* this has been completed already;
16*4882a593Smuzhiyun * ignore for conflict detection */
17*4882a593Smuzhiyun };
18*4882a593Smuzhiyun
drbd_clear_interval(struct drbd_interval * i)19*4882a593Smuzhiyun static inline void drbd_clear_interval(struct drbd_interval *i)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun RB_CLEAR_NODE(&i->rb);
22*4882a593Smuzhiyun }
23*4882a593Smuzhiyun
drbd_interval_empty(struct drbd_interval * i)24*4882a593Smuzhiyun static inline bool drbd_interval_empty(struct drbd_interval *i)
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun return RB_EMPTY_NODE(&i->rb);
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun extern bool drbd_insert_interval(struct rb_root *, struct drbd_interval *);
30*4882a593Smuzhiyun extern bool drbd_contains_interval(struct rb_root *, sector_t,
31*4882a593Smuzhiyun struct drbd_interval *);
32*4882a593Smuzhiyun extern void drbd_remove_interval(struct rb_root *, struct drbd_interval *);
33*4882a593Smuzhiyun extern struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t,
34*4882a593Smuzhiyun unsigned int);
35*4882a593Smuzhiyun extern struct drbd_interval *drbd_next_overlap(struct drbd_interval *, sector_t,
36*4882a593Smuzhiyun unsigned int);
37*4882a593Smuzhiyun
38*4882a593Smuzhiyun #define drbd_for_each_overlap(i, root, sector, size) \
39*4882a593Smuzhiyun for (i = drbd_find_overlap(root, sector, size); \
40*4882a593Smuzhiyun i; \
41*4882a593Smuzhiyun i = drbd_next_overlap(i, sector, size))
42*4882a593Smuzhiyun
43*4882a593Smuzhiyun #endif /* __DRBD_INTERVAL_H */
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