nataraid(4): Add devstat support.
[dragonfly.git] / sys / net / toeplitz2.h
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1/*
2 * Copyright (c) 2009 The DragonFly Project. All rights reserved.
3 *
4 * This code is derived from software contributed to The DragonFly Project
5 * by Sepherosa Ziehau <sepherosa@gmail.com>
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 *
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in
15 * the documentation and/or other materials provided with the
16 * distribution.
17 * 3. Neither the name of The DragonFly Project nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific, prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 */
34
35#ifndef _NET_TOEPLITZ2_H_
36#define _NET_TOEPLITZ2_H_
37
38#ifndef _KERNEL
39#error "kernel only header file"
40#endif
41
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42#ifndef _SYS_SYSTM_H_
43#include <sys/systm.h>
44#endif
45
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46#define TOEPLITZ_KEYSEED_CNT 2
47
48extern uint32_t toeplitz_cache[TOEPLITZ_KEYSEED_CNT][256];
49
50static __inline uint32_t
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51toeplitz_rawhash_addrport(in_addr_t _faddr, in_addr_t _laddr,
52 in_port_t _fport, in_port_t _lport)
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53{
54 uint32_t _res;
55
56 _res = toeplitz_cache[0][_faddr & 0xff];
57 _res ^= toeplitz_cache[0][(_faddr >> 16) & 0xff];
58 _res ^= toeplitz_cache[0][_laddr & 0xff];
59 _res ^= toeplitz_cache[0][(_laddr >> 16) & 0xff];
60 _res ^= toeplitz_cache[0][_fport & 0xff];
61 _res ^= toeplitz_cache[0][_lport & 0xff];
62
63 _res ^= toeplitz_cache[1][(_faddr >> 8) & 0xff];
64 _res ^= toeplitz_cache[1][(_faddr >> 24) & 0xff];
65 _res ^= toeplitz_cache[1][(_laddr >> 8) & 0xff];
66 _res ^= toeplitz_cache[1][(_laddr >> 24) & 0xff];
67 _res ^= toeplitz_cache[1][(_fport >> 8) & 0xff];
68 _res ^= toeplitz_cache[1][(_lport >> 8) & 0xff];
69
70 return _res;
71}
72
73static __inline uint32_t
b73d4152 74toeplitz_rawhash_addr(in_addr_t _faddr, in_addr_t _laddr)
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75{
76 uint32_t _res;
77
78 _res = toeplitz_cache[0][_faddr & 0xff];
79 _res ^= toeplitz_cache[0][(_faddr >> 16) & 0xff];
80 _res ^= toeplitz_cache[0][_laddr & 0xff];
81 _res ^= toeplitz_cache[0][(_laddr >> 16) & 0xff];
82
83 _res ^= toeplitz_cache[1][(_faddr >> 8) & 0xff];
84 _res ^= toeplitz_cache[1][(_faddr >> 24) & 0xff];
85 _res ^= toeplitz_cache[1][(_laddr >> 8) & 0xff];
86 _res ^= toeplitz_cache[1][(_laddr >> 24) & 0xff];
87
88 return _res;
89}
90
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91static __inline int
92toeplitz_hash(uint32_t _rawhash)
93{
94 return (_rawhash & ncpus2_mask);
95}
96
cc85a685 97#endif /* !_NET_TOEPLITZ2_H_ */