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304a16180f
To be shared with DCCP (and others), this is the start of a series of patches
that will expose the already generic TCP hash table routines.
The few changes noticed when calling gcc -S before/after on a pentium4 were of
this type:
movl 40(%esp), %edx
cmpl %esi, 472(%edx)
je .L168
- pushl $291
+ pushl $272
pushl $.LC0
pushl $.LC1
pushl $.LC2
[acme@toy net-2.6.14]$ size net/ipv4/tcp_ipv4.before.o net/ipv4/tcp_ipv4.after.o
text data bss dec hex filename
17804 516 140 18460 481c net/ipv4/tcp_ipv4.before.o
17804 516 140 18460 481c net/ipv4/tcp_ipv4.after.o
Holler if some weird architecture has issues with things like this 8)
Signed-off-by: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
40 lines
1.2 KiB
C
40 lines
1.2 KiB
C
/*
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* INET An implementation of the TCP/IP protocol suite for the LINUX
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* operating system. INET is implemented using the BSD Socket
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* interface as the means of communication with the user level.
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*
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* Authors: Lotsa people, from code originally in tcp
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef _INET_HASHTABLES_H
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#define _INET_HASHTABLES_H
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#include <linux/types.h>
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static inline int inet_ehashfn(const __u32 laddr, const __u16 lport,
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const __u32 faddr, const __u16 fport,
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const int ehash_size)
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{
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int h = (laddr ^ lport) ^ (faddr ^ fport);
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h ^= h >> 16;
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h ^= h >> 8;
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return h & (ehash_size - 1);
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}
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static inline int inet_sk_ehashfn(const struct sock *sk, const int ehash_size)
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{
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const struct inet_sock *inet = inet_sk(sk);
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const __u32 laddr = inet->rcv_saddr;
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const __u16 lport = inet->num;
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const __u32 faddr = inet->daddr;
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const __u16 fport = inet->dport;
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return inet_ehashfn(laddr, lport, faddr, fport, ehash_size);
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}
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#endif /* _INET_HASHTABLES_H */
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