drbd_interval.h (1407B)
1/* SPDX-License-Identifier: GPL-2.0 */ 2#ifndef __DRBD_INTERVAL_H 3#define __DRBD_INTERVAL_H 4 5#include <linux/types.h> 6#include <linux/rbtree.h> 7 8struct drbd_interval { 9 struct rb_node rb; 10 sector_t sector; /* start sector of the interval */ 11 unsigned int size; /* size in bytes */ 12 sector_t end; /* highest interval end in subtree */ 13 unsigned int local:1 /* local or remote request? */; 14 unsigned int waiting:1; /* someone is waiting for completion */ 15 unsigned int completed:1; /* this has been completed already; 16 * ignore for conflict detection */ 17}; 18 19static inline void drbd_clear_interval(struct drbd_interval *i) 20{ 21 RB_CLEAR_NODE(&i->rb); 22} 23 24static inline bool drbd_interval_empty(struct drbd_interval *i) 25{ 26 return RB_EMPTY_NODE(&i->rb); 27} 28 29extern bool drbd_insert_interval(struct rb_root *, struct drbd_interval *); 30extern bool drbd_contains_interval(struct rb_root *, sector_t, 31 struct drbd_interval *); 32extern void drbd_remove_interval(struct rb_root *, struct drbd_interval *); 33extern struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t, 34 unsigned int); 35extern struct drbd_interval *drbd_next_overlap(struct drbd_interval *, sector_t, 36 unsigned int); 37 38#define drbd_for_each_overlap(i, root, sector, size) \ 39 for (i = drbd_find_overlap(root, sector, size); \ 40 i; \ 41 i = drbd_next_overlap(i, sector, size)) 42 43#endif /* __DRBD_INTERVAL_H */