34b07340ff
as well as providing stateful load balancing when used with RADIX_MPATH. - Currently compiled in to i386 and amd64 but disabled by default, it can be enabled at runtime with 'sysctl net.inet.flowtable.enable=1'. - Embedded users can remove it entirely from the kernel by adding 'nooption FLOWTABLE' to their kernel config files. - A minimal hookup will be added to ip_output in a subsequent commit. I would like to see more review before bringing in changes that require more churn. Supported by: Bitgravity Inc.
78 lines
2.3 KiB
C
78 lines
2.3 KiB
C
/**************************************************************************
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Copyright (c) 2008-2009, BitGravity Inc.
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Neither the name of the BitGravity Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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$FreeBSD$
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***************************************************************************/
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#ifndef _NET_FLOWTABLE_H_
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#define _NET_FLOWTABLE_H_
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#ifdef _KERNEL
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#include "opt_route.h"
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#include <net/ethernet.h>
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#include <netinet/in.h>
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#define FL_HASH_PORTS (1<<0) /* hash 4-tuple + protocol */
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#define FL_PCPU (1<<1) /* pcpu cache */
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struct flowtable;
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extern struct flowtable *ip_ft;
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extern struct flowtable *ip_forward_ft;
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#ifdef FLOWTABLE
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struct flowtable *flowtable_alloc(int nentry, int flags);
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/*
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* Given a flow table, look up the L3 and L2 information and
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* return it in the route
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*
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*/
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int flowtable_lookup(struct flowtable *ft, struct mbuf *m,
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struct route *ro);
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#else
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static __inline struct flowtable *
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flowtable_alloc(int nentry, int flags)
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{
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return (NULL);
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}
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static __inline int
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flowtable_lookup(struct flowtable *ft, struct mbuf *m,
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struct route *ro)
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{
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return (ENOTSUP);
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}
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#endif
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#endif
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#endif
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