mirror of
https://github.com/torvalds/linux.git
synced 2024-12-25 12:21:37 +00:00
d0e22a260c
Add a macro and helper function for doing that. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
41 lines
1.2 KiB
C
41 lines
1.2 KiB
C
#ifndef __DRBD_INTERVAL_H
|
|
#define __DRBD_INTERVAL_H
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/rbtree.h>
|
|
|
|
struct drbd_interval {
|
|
struct rb_node rb;
|
|
sector_t sector; /* start sector of the interval */
|
|
unsigned int size; /* size in bytes */
|
|
sector_t end; /* highest interval end in subtree */
|
|
int local:1 /* local or remote request? */;
|
|
int waiting:1;
|
|
};
|
|
|
|
static inline void drbd_clear_interval(struct drbd_interval *i)
|
|
{
|
|
RB_CLEAR_NODE(&i->rb);
|
|
}
|
|
|
|
static inline bool drbd_interval_empty(struct drbd_interval *i)
|
|
{
|
|
return RB_EMPTY_NODE(&i->rb);
|
|
}
|
|
|
|
extern bool drbd_insert_interval(struct rb_root *, struct drbd_interval *);
|
|
extern bool drbd_contains_interval(struct rb_root *, sector_t,
|
|
struct drbd_interval *);
|
|
extern void drbd_remove_interval(struct rb_root *, struct drbd_interval *);
|
|
extern struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t,
|
|
unsigned int);
|
|
extern struct drbd_interval *drbd_next_overlap(struct drbd_interval *, sector_t,
|
|
unsigned int);
|
|
|
|
#define drbd_for_each_overlap(i, root, sector, size) \
|
|
for (i = drbd_find_overlap(root, sector, size); \
|
|
i; \
|
|
i = drbd_next_overlap(i, sector, size))
|
|
|
|
#endif /* __DRBD_INTERVAL_H */
|