projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| b2441318 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
| 0939b0e5 AG |
2 | #ifndef __DRBD_INTERVAL_H |
| 3 | #define __DRBD_INTERVAL_H | |
| 4 | ||
| 5 | #include <linux/types.h> | |
| 6 | #include <linux/rbtree.h> | |
| 7 | ||
| 8 | struct drbd_interval { | |
| 9 | struct rb_node rb; | |
| 7e5fec31 FF |
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 */ | |
| 0939b0e5 AG |
17 | }; |
| 18 | ||
| 19 | static inline void drbd_clear_interval(struct drbd_interval *i) | |
| 20 | { | |
| 21 | RB_CLEAR_NODE(&i->rb); | |
| 22 | } | |
| 23 | ||
| 24 | static inline bool drbd_interval_empty(struct drbd_interval *i) | |
| 25 | { | |
| 26 | return RB_EMPTY_NODE(&i->rb); | |
| 27 | } | |
| 28 | ||
| d0e22a26 AG |
29 | extern bool drbd_insert_interval(struct rb_root *, struct drbd_interval *); |
| 30 | extern bool drbd_contains_interval(struct rb_root *, sector_t, | |
| 31 | struct drbd_interval *); | |
| 32 | extern void drbd_remove_interval(struct rb_root *, struct drbd_interval *); | |
| 33 | extern struct drbd_interval *drbd_find_overlap(struct rb_root *, sector_t, | |
| 0939b0e5 | 34 | unsigned int); |
| d0e22a26 AG |
35 | extern 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)) | |
| 0939b0e5 AG |
42 | |
| 43 | #endif /* __DRBD_INTERVAL_H */ |