crush: sync up with userspace
.. up to ceph.git commit 1db1abc8328d ("crush: eliminate ad hoc diff between kernel and userspace"). This fixes a bunch of recently pulled coding style issues and makes includes a bit cleaner. A patch "crush:Make the function crush_ln static" from Nicholas Krause <xerofoify@gmail.com> is folded in as crush_ln() has been made static in userspace as well. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
parent
8f529795ba
commit
b459be739f
|
@ -1,7 +1,11 @@
|
|||
#ifndef CEPH_CRUSH_CRUSH_H
|
||||
#define CEPH_CRUSH_CRUSH_H
|
||||
|
||||
#include <linux/types.h>
|
||||
#ifdef __KERNEL__
|
||||
# include <linux/types.h>
|
||||
#else
|
||||
# include "crush_compat.h"
|
||||
#endif
|
||||
|
||||
/*
|
||||
* CRUSH is a pseudo-random data distribution algorithm that
|
||||
|
@ -20,7 +24,11 @@
|
|||
#define CRUSH_MAGIC 0x00010000ul /* for detecting algorithm revisions */
|
||||
|
||||
#define CRUSH_MAX_DEPTH 10 /* max crush hierarchy depth */
|
||||
#define CRUSH_MAX_RULESET (1<<8) /* max crush ruleset number */
|
||||
#define CRUSH_MAX_RULES CRUSH_MAX_RULESET /* should be the same as max rulesets */
|
||||
|
||||
#define CRUSH_MAX_DEVICE_WEIGHT (100u * 0x10000u)
|
||||
#define CRUSH_MAX_BUCKET_WEIGHT (65535u * 0x10000u)
|
||||
|
||||
#define CRUSH_ITEM_UNDEF 0x7ffffffe /* undefined result (internal use only) */
|
||||
#define CRUSH_ITEM_NONE 0x7fffffff /* no result */
|
||||
|
@ -108,6 +116,15 @@ enum {
|
|||
};
|
||||
extern const char *crush_bucket_alg_name(int alg);
|
||||
|
||||
/*
|
||||
* although tree was a legacy algorithm, it has been buggy, so
|
||||
* exclude it.
|
||||
*/
|
||||
#define CRUSH_LEGACY_ALLOWED_BUCKET_ALGS ( \
|
||||
(1 << CRUSH_BUCKET_UNIFORM) | \
|
||||
(1 << CRUSH_BUCKET_LIST) | \
|
||||
(1 << CRUSH_BUCKET_STRAW))
|
||||
|
||||
struct crush_bucket {
|
||||
__s32 id; /* this'll be negative */
|
||||
__u16 type; /* non-zero; type=0 is reserved for devices */
|
||||
|
@ -174,7 +191,7 @@ struct crush_map {
|
|||
/* choose local attempts using a fallback permutation before
|
||||
* re-descent */
|
||||
__u32 choose_local_fallback_tries;
|
||||
/* choose attempts before giving up */
|
||||
/* choose attempts before giving up */
|
||||
__u32 choose_total_tries;
|
||||
/* attempt chooseleaf inner descent once for firstn mode; on
|
||||
* reject retry outer descent. Note that this does *not*
|
||||
|
@ -187,6 +204,25 @@ struct crush_map {
|
|||
* that want to limit reshuffling, a value of 3 or 4 will make the
|
||||
* mappings line up a bit better with previous mappings. */
|
||||
__u8 chooseleaf_vary_r;
|
||||
|
||||
#ifndef __KERNEL__
|
||||
/*
|
||||
* version 0 (original) of straw_calc has various flaws. version 1
|
||||
* fixes a few of them.
|
||||
*/
|
||||
__u8 straw_calc_version;
|
||||
|
||||
/*
|
||||
* allowed bucket algs is a bitmask, here the bit positions
|
||||
* are CRUSH_BUCKET_*. note that these are *bits* and
|
||||
* CRUSH_BUCKET_* values are not, so we need to or together (1
|
||||
* << CRUSH_BUCKET_WHATEVER). The 0th bit is not used to
|
||||
* minimize confusion (bucket type values start at 1).
|
||||
*/
|
||||
__u32 allowed_bucket_algs;
|
||||
|
||||
__u32 *choose_tries;
|
||||
#endif
|
||||
};
|
||||
|
||||
|
||||
|
|
|
@ -1,6 +1,12 @@
|
|||
#ifndef CEPH_CRUSH_HASH_H
|
||||
#define CEPH_CRUSH_HASH_H
|
||||
|
||||
#ifdef __KERNEL__
|
||||
# include <linux/types.h>
|
||||
#else
|
||||
# include "crush_compat.h"
|
||||
#endif
|
||||
|
||||
#define CRUSH_HASH_RJENKINS1 0
|
||||
|
||||
#define CRUSH_HASH_DEFAULT CRUSH_HASH_RJENKINS1
|
||||
|
|
|
@ -8,7 +8,7 @@
|
|||
* LGPL2
|
||||
*/
|
||||
|
||||
#include <linux/crush/crush.h>
|
||||
#include "crush.h"
|
||||
|
||||
extern int crush_find_rule(const struct crush_map *map, int ruleset, int type, int size);
|
||||
extern int crush_do_rule(const struct crush_map *map,
|
||||
|
|
|
@ -1,15 +1,11 @@
|
|||
|
||||
#ifdef __KERNEL__
|
||||
# include <linux/slab.h>
|
||||
# include <linux/crush/crush.h>
|
||||
#else
|
||||
# include <stdlib.h>
|
||||
# include <assert.h>
|
||||
# define kfree(x) do { if (x) free(x); } while (0)
|
||||
# define BUG_ON(x) assert(!(x))
|
||||
# include "crush_compat.h"
|
||||
# include "crush.h"
|
||||
#endif
|
||||
|
||||
#include <linux/crush/crush.h>
|
||||
|
||||
const char *crush_bucket_alg_name(int alg)
|
||||
{
|
||||
switch (alg) {
|
||||
|
@ -134,6 +130,9 @@ void crush_destroy(struct crush_map *map)
|
|||
kfree(map->rules);
|
||||
}
|
||||
|
||||
#ifndef __KERNEL__
|
||||
kfree(map->choose_tries);
|
||||
#endif
|
||||
kfree(map);
|
||||
}
|
||||
|
||||
|
|
|
@ -10,20 +10,20 @@
|
|||
*
|
||||
*/
|
||||
|
||||
#if defined(__linux__)
|
||||
#include <linux/types.h>
|
||||
#elif defined(__FreeBSD__)
|
||||
#include <sys/types.h>
|
||||
#endif
|
||||
|
||||
#ifndef CEPH_CRUSH_LN_H
|
||||
#define CEPH_CRUSH_LN_H
|
||||
|
||||
#ifdef __KERNEL__
|
||||
# include <linux/types.h>
|
||||
#else
|
||||
# include "crush_compat.h"
|
||||
#endif
|
||||
|
||||
// RH_LH_tbl[2*k] = 2^48/(1.0+k/128.0)
|
||||
// RH_LH_tbl[2*k+1] = 2^48*log2(1.0+k/128.0)
|
||||
|
||||
static int64_t __RH_LH_tbl[128*2+2] = {
|
||||
/*
|
||||
* RH_LH_tbl[2*k] = 2^48/(1.0+k/128.0)
|
||||
* RH_LH_tbl[2*k+1] = 2^48*log2(1.0+k/128.0)
|
||||
*/
|
||||
static __s64 __RH_LH_tbl[128*2+2] = {
|
||||
0x0001000000000000ll, 0x0000000000000000ll, 0x0000fe03f80fe040ll, 0x000002dfca16dde1ll,
|
||||
0x0000fc0fc0fc0fc1ll, 0x000005b9e5a170b4ll, 0x0000fa232cf25214ll, 0x0000088e68ea899all,
|
||||
0x0000f83e0f83e0f9ll, 0x00000b5d69bac77ell, 0x0000f6603d980f67ll, 0x00000e26fd5c8555ll,
|
||||
|
@ -89,11 +89,12 @@ static int64_t __RH_LH_tbl[128*2+2] = {
|
|||
0x0000820820820821ll, 0x0000fa2f045e7832ll, 0x000081848da8faf1ll, 0x0000fba577877d7dll,
|
||||
0x0000810204081021ll, 0x0000fd1a708bbe11ll, 0x0000808080808081ll, 0x0000fe8df263f957ll,
|
||||
0x0000800000000000ll, 0x0000ffff00000000ll,
|
||||
};
|
||||
};
|
||||
|
||||
|
||||
// LL_tbl[k] = 2^48*log2(1.0+k/2^15);
|
||||
static int64_t __LL_tbl[256] = {
|
||||
/*
|
||||
* LL_tbl[k] = 2^48*log2(1.0+k/2^15)
|
||||
*/
|
||||
static __s64 __LL_tbl[256] = {
|
||||
0x0000000000000000ull, 0x00000002e2a60a00ull, 0x000000070cb64ec5ull, 0x00000009ef50ce67ull,
|
||||
0x0000000cd1e588fdull, 0x0000000fb4747e9cull, 0x0000001296fdaf5eull, 0x0000001579811b58ull,
|
||||
0x000000185bfec2a1ull, 0x0000001b3e76a552ull, 0x0000001e20e8c380ull, 0x0000002103551d43ull,
|
||||
|
@ -160,7 +161,4 @@ static int64_t __LL_tbl[256] = {
|
|||
0x000002d4562d2ec6ull, 0x000002d73330209dull, 0x000002da102d63b0ull, 0x000002dced24f814ull,
|
||||
};
|
||||
|
||||
|
||||
|
||||
|
||||
#endif
|
||||
|
|
|
@ -1,6 +1,8 @@
|
|||
|
||||
#include <linux/types.h>
|
||||
#include <linux/crush/hash.h>
|
||||
#ifdef __KERNEL__
|
||||
# include <linux/crush/hash.h>
|
||||
#else
|
||||
# include "hash.h"
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Robert Jenkins' function for mixing 32-bit values
|
||||
|
|
|
@ -1,27 +1,31 @@
|
|||
/*
|
||||
* Ceph - scalable distributed file system
|
||||
*
|
||||
* Copyright (C) 2015 Intel Corporation All Rights Reserved
|
||||
*
|
||||
* This is free software; you can redistribute it and/or
|
||||
* modify it under the terms of the GNU Lesser General Public
|
||||
* License version 2.1, as published by the Free Software
|
||||
* Foundation. See file COPYING.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifdef __KERNEL__
|
||||
# include <linux/string.h>
|
||||
# include <linux/slab.h>
|
||||
# include <linux/bug.h>
|
||||
# include <linux/kernel.h>
|
||||
# ifndef dprintk
|
||||
# define dprintk(args...)
|
||||
# endif
|
||||
# include <linux/crush/crush.h>
|
||||
# include <linux/crush/hash.h>
|
||||
#else
|
||||
# include <string.h>
|
||||
# include <stdio.h>
|
||||
# include <stdlib.h>
|
||||
# include <assert.h>
|
||||
# define BUG_ON(x) assert(!(x))
|
||||
# define dprintk(args...) /* printf(args) */
|
||||
# define kmalloc(x, f) malloc(x)
|
||||
# define kfree(x) free(x)
|
||||
# include "crush_compat.h"
|
||||
# include "crush.h"
|
||||
# include "hash.h"
|
||||
#endif
|
||||
|
||||
#include <linux/crush/crush.h>
|
||||
#include <linux/crush/hash.h>
|
||||
#include "crush_ln_table.h"
|
||||
|
||||
#define dprintk(args...) /* printf(args) */
|
||||
|
||||
/*
|
||||
* Implement the core CRUSH mapping algorithm.
|
||||
*/
|
||||
|
@ -139,7 +143,7 @@ static int bucket_list_choose(struct crush_bucket_list *bucket,
|
|||
int i;
|
||||
|
||||
for (i = bucket->h.size-1; i >= 0; i--) {
|
||||
__u64 w = crush_hash32_4(bucket->h.hash,x, bucket->h.items[i],
|
||||
__u64 w = crush_hash32_4(bucket->h.hash, x, bucket->h.items[i],
|
||||
r, bucket->h.id);
|
||||
w &= 0xffff;
|
||||
dprintk("list_choose i=%d x=%d r=%d item %d weight %x "
|
||||
|
@ -238,43 +242,46 @@ static int bucket_straw_choose(struct crush_bucket_straw *bucket,
|
|||
return bucket->h.items[high];
|
||||
}
|
||||
|
||||
// compute 2^44*log2(input+1)
|
||||
uint64_t crush_ln(unsigned xin)
|
||||
/* compute 2^44*log2(input+1) */
|
||||
static __u64 crush_ln(unsigned int xin)
|
||||
{
|
||||
unsigned x=xin, x1;
|
||||
int iexpon, index1, index2;
|
||||
uint64_t RH, LH, LL, xl64, result;
|
||||
unsigned int x = xin, x1;
|
||||
int iexpon, index1, index2;
|
||||
__u64 RH, LH, LL, xl64, result;
|
||||
|
||||
x++;
|
||||
x++;
|
||||
|
||||
// normalize input
|
||||
iexpon = 15;
|
||||
while(!(x&0x18000)) { x<<=1; iexpon--; }
|
||||
/* normalize input */
|
||||
iexpon = 15;
|
||||
while (!(x & 0x18000)) {
|
||||
x <<= 1;
|
||||
iexpon--;
|
||||
}
|
||||
|
||||
index1 = (x>>8)<<1;
|
||||
// RH ~ 2^56/index1
|
||||
RH = __RH_LH_tbl[index1 - 256];
|
||||
// LH ~ 2^48 * log2(index1/256)
|
||||
LH = __RH_LH_tbl[index1 + 1 - 256];
|
||||
index1 = (x >> 8) << 1;
|
||||
/* RH ~ 2^56/index1 */
|
||||
RH = __RH_LH_tbl[index1 - 256];
|
||||
/* LH ~ 2^48 * log2(index1/256) */
|
||||
LH = __RH_LH_tbl[index1 + 1 - 256];
|
||||
|
||||
// RH*x ~ 2^48 * (2^15 + xf), xf<2^8
|
||||
xl64 = (int64_t)x * RH;
|
||||
xl64 >>= 48;
|
||||
x1 = xl64;
|
||||
/* RH*x ~ 2^48 * (2^15 + xf), xf<2^8 */
|
||||
xl64 = (__s64)x * RH;
|
||||
xl64 >>= 48;
|
||||
x1 = xl64;
|
||||
|
||||
result = iexpon;
|
||||
result <<= (12 + 32);
|
||||
result = iexpon;
|
||||
result <<= (12 + 32);
|
||||
|
||||
index2 = x1 & 0xff;
|
||||
// LL ~ 2^48*log2(1.0+index2/2^15)
|
||||
LL = __LL_tbl[index2];
|
||||
index2 = x1 & 0xff;
|
||||
/* LL ~ 2^48*log2(1.0+index2/2^15) */
|
||||
LL = __LL_tbl[index2];
|
||||
|
||||
LH = LH + LL;
|
||||
LH = LH + LL;
|
||||
|
||||
LH >>= (48-12 - 32);
|
||||
result += LH;
|
||||
LH >>= (48 - 12 - 32);
|
||||
result += LH;
|
||||
|
||||
return result;
|
||||
return result;
|
||||
}
|
||||
|
||||
|
||||
|
@ -290,9 +297,9 @@ uint64_t crush_ln(unsigned xin)
|
|||
static int bucket_straw2_choose(struct crush_bucket_straw2 *bucket,
|
||||
int x, int r)
|
||||
{
|
||||
unsigned i, high = 0;
|
||||
unsigned u;
|
||||
unsigned w;
|
||||
unsigned int i, high = 0;
|
||||
unsigned int u;
|
||||
unsigned int w;
|
||||
__s64 ln, draw, high_draw = 0;
|
||||
|
||||
for (i = 0; i < bucket->h.size; i++) {
|
||||
|
@ -567,6 +574,10 @@ reject:
|
|||
out[outpos] = item;
|
||||
outpos++;
|
||||
count--;
|
||||
#ifndef __KERNEL__
|
||||
if (map->choose_tries && ftotal <= map->choose_total_tries)
|
||||
map->choose_tries[ftotal]++;
|
||||
#endif
|
||||
}
|
||||
|
||||
dprintk("CHOOSE returns %d\n", outpos);
|
||||
|
@ -610,6 +621,20 @@ static void crush_choose_indep(const struct crush_map *map,
|
|||
}
|
||||
|
||||
for (ftotal = 0; left > 0 && ftotal < tries; ftotal++) {
|
||||
#ifdef DEBUG_INDEP
|
||||
if (out2 && ftotal) {
|
||||
dprintk("%u %d a: ", ftotal, left);
|
||||
for (rep = outpos; rep < endpos; rep++) {
|
||||
dprintk(" %d", out[rep]);
|
||||
}
|
||||
dprintk("\n");
|
||||
dprintk("%u %d b: ", ftotal, left);
|
||||
for (rep = outpos; rep < endpos; rep++) {
|
||||
dprintk(" %d", out2[rep]);
|
||||
}
|
||||
dprintk("\n");
|
||||
}
|
||||
#endif
|
||||
for (rep = outpos; rep < endpos; rep++) {
|
||||
if (out[rep] != CRUSH_ITEM_UNDEF)
|
||||
continue;
|
||||
|
@ -726,6 +751,24 @@ static void crush_choose_indep(const struct crush_map *map,
|
|||
out2[rep] = CRUSH_ITEM_NONE;
|
||||
}
|
||||
}
|
||||
#ifndef __KERNEL__
|
||||
if (map->choose_tries && ftotal <= map->choose_total_tries)
|
||||
map->choose_tries[ftotal]++;
|
||||
#endif
|
||||
#ifdef DEBUG_INDEP
|
||||
if (out2) {
|
||||
dprintk("%u %d a: ", ftotal, left);
|
||||
for (rep = outpos; rep < endpos; rep++) {
|
||||
dprintk(" %d", out[rep]);
|
||||
}
|
||||
dprintk("\n");
|
||||
dprintk("%u %d b: ", ftotal, left);
|
||||
for (rep = outpos; rep < endpos; rep++) {
|
||||
dprintk(" %d", out2[rep]);
|
||||
}
|
||||
dprintk("\n");
|
||||
}
|
||||
#endif
|
||||
}
|
||||
|
||||
/**
|
||||
|
@ -884,7 +927,7 @@ int crush_do_rule(const struct crush_map *map,
|
|||
0);
|
||||
} else {
|
||||
out_size = ((numrep < (result_max-osize)) ?
|
||||
numrep : (result_max-osize));
|
||||
numrep : (result_max-osize));
|
||||
crush_choose_indep(
|
||||
map,
|
||||
map->buckets[-1-w[i]],
|
||||
|
@ -930,5 +973,3 @@ int crush_do_rule(const struct crush_map *map,
|
|||
}
|
||||
return result_len;
|
||||
}
|
||||
|
||||
|
||||
|
|
Loading…
Reference in New Issue