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ceph: make CRUSH hash functions non-inline

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These are way to big to be inline.  I missed crush/* when doing the inline
audit for akpm's review.

Signed-off-by: Sage Weil <sage@newdream.net>
This commit is contained in:
Sage Weil 2009-11-06 16:39:26 -08:00
parent 1bdb70e590
commit c6cf726316
6 changed files with 107 additions and 96 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ceph/Makefile
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@ -11,7 +11,7 @@ ceph-objs := super.o inode.o dir.o file.o addr.o ioctl.o \
messenger.o msgpool.o buffer.o \
mds_client.o mdsmap.o \
mon_client.o \
osd_client.o osdmap.o crush/crush.o crush/mapper.o \
osd_client.o osdmap.o crush/crush.o crush/mapper.o crush/hash.o \
debugfs.o \
ceph_fs.o ceph_strings.o ceph_frag.o

1
fs/ceph/README
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@ -15,3 +15,4 @@ src/crush/crush.h fs/ceph/crush/crush.h
src/crush/mapper.c fs/ceph/crush/mapper.c
src/crush/mapper.h fs/ceph/crush/mapper.h
src/crush/hash.h fs/ceph/crush/hash.h
src/crush/hash.c fs/ceph/crush/hash.c

11
fs/ceph/crush/crush.c
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@ -10,6 +10,17 @@
#include "crush.h"
const char *crush_bucket_alg_name(int alg)
{
switch (alg) {
case CRUSH_BUCKET_UNIFORM: return "uniform";
case CRUSH_BUCKET_LIST: return "list";
case CRUSH_BUCKET_TREE: return "tree";
case CRUSH_BUCKET_STRAW: return "straw";
default: return "unknown";
}
}
/**
* crush_get_bucket_item_weight - Get weight of an item in given bucket
* @b: bucket pointer

11
fs/ceph/crush/crush.h
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@ -97,16 +97,7 @@ enum {
CRUSH_BUCKET_TREE = 3,
CRUSH_BUCKET_STRAW = 4
};
static inline const char *crush_bucket_alg_name(int alg)
{
switch (alg) {
case CRUSH_BUCKET_UNIFORM: return "uniform";
case CRUSH_BUCKET_LIST: return "list";
case CRUSH_BUCKET_TREE: return "tree";
case CRUSH_BUCKET_STRAW: return "straw";
default: return "unknown";
}
}
extern const char *crush_bucket_alg_name(int alg);
struct crush_bucket {
__s32 id; /* this'll be negative */

86
fs/ceph/crush/hash.c Normal file
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@ -0,0 +1,86 @@
#include <linux/types.h>
/*
* Robert Jenkins' function for mixing 32-bit values
* http://burtleburtle.net/bob/hash/evahash.html
* a, b = random bits, c = input and output
*/
#define crush_hashmix(a, b, c) do { \
a = a-b; a = a-c; a = a^(c>>13); \
b = b-c; b = b-a; b = b^(a<<8); \
c = c-a; c = c-b; c = c^(b>>13); \
a = a-b; a = a-c; a = a^(c>>12); \
b = b-c; b = b-a; b = b^(a<<16); \
c = c-a; c = c-b; c = c^(b>>5); \
a = a-b; a = a-c; a = a^(c>>3); \
b = b-c; b = b-a; b = b^(a<<10); \
c = c-a; c = c-b; c = c^(b>>15); \
} while (0)
#define crush_hash_seed 1315423911
__u32 crush_hash32(__u32 a)
{
__u32 hash = crush_hash_seed ^ a;
__u32 b = a;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(b, x, hash);
crush_hashmix(y, a, hash);
return hash;
}
__u32 crush_hash32_2(__u32 a, __u32 b)
{
__u32 hash = crush_hash_seed ^ a ^ b;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(x, a, hash);
crush_hashmix(b, y, hash);
return hash;
}
__u32 crush_hash32_3(__u32 a, __u32 b, __u32 c)
{
__u32 hash = crush_hash_seed ^ a ^ b ^ c;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(c, x, hash);
crush_hashmix(y, a, hash);
crush_hashmix(b, x, hash);
crush_hashmix(y, c, hash);
return hash;
}
__u32 crush_hash32_4(__u32 a, __u32 b, __u32 c, __u32 d)
{
__u32 hash = crush_hash_seed ^ a ^ b ^ c ^ d;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(c, d, hash);
crush_hashmix(a, x, hash);
crush_hashmix(y, b, hash);
crush_hashmix(c, x, hash);
crush_hashmix(y, d, hash);
return hash;
}
__u32 crush_hash32_5(__u32 a, __u32 b, __u32 c, __u32 d, __u32 e)
{
__u32 hash = crush_hash_seed ^ a ^ b ^ c ^ d ^ e;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(c, d, hash);
crush_hashmix(e, x, hash);
crush_hashmix(y, a, hash);
crush_hashmix(b, x, hash);
crush_hashmix(y, c, hash);
crush_hashmix(d, x, hash);
crush_hashmix(y, e, hash);
return hash;
}

92
fs/ceph/crush/hash.h
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@ -1,90 +1,12 @@
#ifndef _CRUSH_HASH_H
#define _CRUSH_HASH_H
/*
* Robert Jenkins' function for mixing 32-bit values
* http://burtleburtle.net/bob/hash/evahash.html
* a, b = random bits, c = input and output
*/
#define crush_hashmix(a, b, c) do { \
a = a-b; a = a-c; a = a^(c>>13); \
b = b-c; b = b-a; b = b^(a<<8); \
c = c-a; c = c-b; c = c^(b>>13); \
a = a-b; a = a-c; a = a^(c>>12); \
b = b-c; b = b-a; b = b^(a<<16); \
c = c-a; c = c-b; c = c^(b>>5); \
a = a-b; a = a-c; a = a^(c>>3); \
b = b-c; b = b-a; b = b^(a<<10); \
c = c-a; c = c-b; c = c^(b>>15); \
} while (0)
#define crush_hash_seed 1315423911
static inline __u32 crush_hash32(__u32 a)
{
__u32 hash = crush_hash_seed ^ a;
__u32 b = a;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(b, x, hash);
crush_hashmix(y, a, hash);
return hash;
}
static inline __u32 crush_hash32_2(__u32 a, __u32 b)
{
__u32 hash = crush_hash_seed ^ a ^ b;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(x, a, hash);
crush_hashmix(b, y, hash);
return hash;
}
static inline __u32 crush_hash32_3(__u32 a, __u32 b, __u32 c)
{
__u32 hash = crush_hash_seed ^ a ^ b ^ c;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(c, x, hash);
crush_hashmix(y, a, hash);
crush_hashmix(b, x, hash);
crush_hashmix(y, c, hash);
return hash;
}
static inline __u32 crush_hash32_4(__u32 a, __u32 b, __u32 c,
__u32 d)
{
__u32 hash = crush_hash_seed ^ a ^ b ^ c ^ d;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(c, d, hash);
crush_hashmix(a, x, hash);
crush_hashmix(y, b, hash);
crush_hashmix(c, x, hash);
crush_hashmix(y, d, hash);
return hash;
}
static inline __u32 crush_hash32_5(__u32 a, __u32 b, __u32 c,
__u32 d, __u32 e)
{
__u32 hash = crush_hash_seed ^ a ^ b ^ c ^ d ^ e;
__u32 x = 231232;
__u32 y = 1232;
crush_hashmix(a, b, hash);
crush_hashmix(c, d, hash);
crush_hashmix(e, x, hash);
crush_hashmix(y, a, hash);
crush_hashmix(b, x, hash);
crush_hashmix(y, c, hash);
crush_hashmix(d, x, hash);
crush_hashmix(y, e, hash);
return hash;
}
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);
#endif