forked from Minki/linux
5e4722645a
Instead of keeping a separate tree for local and remote write requests for finding requests and for conflict detection, use the same tree for both purposes. Introduce a flag to allow distinguishing the two possible types of entries in this tree. Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com> Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
33 lines
894 B
C
33 lines
894 B
C
#ifndef __DRBD_INTERVAL_H
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#define __DRBD_INTERVAL_H
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#include <linux/types.h>
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#include <linux/rbtree.h>
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struct drbd_interval {
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struct rb_node rb;
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sector_t sector; /* start sector of the interval */
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unsigned int size; /* size in bytes */
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sector_t end; /* highest interval end in subtree */
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int local:1 /* local or remote request? */;
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int waiting:1;
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};
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static inline void drbd_clear_interval(struct drbd_interval *i)
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{
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RB_CLEAR_NODE(&i->rb);
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}
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static inline bool drbd_interval_empty(struct drbd_interval *i)
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{
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return RB_EMPTY_NODE(&i->rb);
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}
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bool drbd_insert_interval(struct rb_root *, struct drbd_interval *);
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bool drbd_contains_interval(struct rb_root *, sector_t, struct drbd_interval *);
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void drbd_remove_interval(struct rb_root *, struct drbd_interval *);
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struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t,
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unsigned int);
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#endif /* __DRBD_INTERVAL_H */
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