linux/fs/ceph/crush/hash.h
Sage Weil fb690390e3 ceph: make CRUSH hash function a bucket property
Make the integer hash function a property of the bucket it is used on.  This
allows us to gracefully add support for new hash functions without starting
from scatch.

Signed-off-by: Sage Weil <sage@newdream.net>
2009-11-07 20:18:22 -08:00

18 lines
518 B
C

#ifndef _CRUSH_HASH_H
#define _CRUSH_HASH_H
#define CRUSH_HASH_RJENKINS1 0
#define CRUSH_HASH_DEFAULT CRUSH_HASH_RJENKINS1
extern const char *crush_hash_name(int type);
extern __u32 crush_hash32(int type, __u32 a);
extern __u32 crush_hash32_2(int type, __u32 a, __u32 b);
extern __u32 crush_hash32_3(int type, __u32 a, __u32 b, __u32 c);
extern __u32 crush_hash32_4(int type, __u32 a, __u32 b, __u32 c, __u32 d);
extern __u32 crush_hash32_5(int type, __u32 a, __u32 b, __u32 c, __u32 d,
__u32 e);
#endif