linux/drivers/block/drbd/drbd_interval.h
Fabian Frederick 7e5fec3168 drbd: code cleanups without semantic changes
This contains various cosmetic fixes ranging from simple typos to
const-ifying, and using booleans properly.

Original commit messages from Fabian's patch set:
drbd: debugfs: constify drbd_version_fops
drbd: use seq_put instead of seq_print where possible
drbd: include linux/uaccess.h instead of asm/uaccess.h
drbd: use const char * const for drbd strings
drbd: kerneldoc warning fix in w_e_end_data_req()
drbd: use unsigned for one bit fields
drbd: use bool for peer is_ states
drbd: fix typo
drbd: use | for bitmask combination
drbd: use true/false for bool
drbd: fix drbd_bm_init() comments
drbd: introduce peer state union
drbd: fix maybe_pull_ahead() locking comments
drbd: use bool for growing
drbd: remove redundant declarations
drbd: replace if/BUG by BUG_ON

Signed-off-by: Fabian Frederick <fabf@skynet.be>
Signed-off-by: Roland Kammerer <roland.kammerer@linbit.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
2016-06-13 21:43:07 -06:00

43 lines
1.3 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 */
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 */
};
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 */