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- /* SPDX-License-Identifier: GPL-2.0-only */
- #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 */
- sector_t end; /* highest interval end in subtree */
- unsigned int size; /* size in bytes */
- unsigned int local:1 /* local or remote request? */;
- unsigned int waiting:1; /* someone is waiting for completion */
- unsigned int completed:1; /* this has been completed already;
- * ignore for conflict detection */
- /* to resume a partially successful drbd_al_begin_io_nonblock(); */
- unsigned int partially_in_al_next_enr;
- };
- 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 */
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