diff options
| author | Sage Weil <sage@newdream.net> | 2009-11-07 20:18:22 -0800 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2009-11-07 20:18:22 -0800 |
| commit | fb690390e305ea51e1883b105c7d3c52d7100ba5 (patch) | |
| tree | c099a71133225b1d22bba976e93dc6ab92a08986 /fs/ceph/crush/hash.h | |
| parent | 1654dd0cf5ee1827322aca156af7d96d757201c7 (diff) | |
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>
Diffstat (limited to 'fs/ceph/crush/hash.h')
| -rw-r--r-- | fs/ceph/crush/hash.h | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/fs/ceph/crush/hash.h b/fs/ceph/crush/hash.h index 9ce89f85dc7d..ff48e110e4bb 100644 --- a/fs/ceph/crush/hash.h +++ b/fs/ceph/crush/hash.h @@ -1,12 +1,17 @@ #ifndef _CRUSH_HASH_H #define _CRUSH_HASH_H -extern __u32 crush_hash32(__u32 a); -extern __u32 crush_hash32_2(__u32 a, __u32 b); -extern __u32 crush_hash32_3(__u32 a, __u32 b, __u32 c); -extern __u32 crush_hash32_4(__u32 a, __u32 b, __u32 c, - __u32 d); -extern __u32 crush_hash32_5(__u32 a, __u32 b, __u32 c, - __u32 d, __u32 e); +#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 |