f0e49f6631
insert flow entry. During the route lookup the critical section is exited. It may happen, that after route lookup we will be executed on an other CPU that already has such flowentry. Before this change we simply freed the flowentry and returned to ip_output() with failure. Actually there is nothing wrong with using previously allocated flow entry, updating it properly. Thus, make flowentry_insert() return the new either old fle, and make use of it. Count reuses as "collisions" and real inserts as "inserts". Reviewed by: adrian Sponsored by: Netflix Sponsored by: Nginx, Inc.
79 lines
2.4 KiB
C
79 lines
2.4 KiB
C
/**************************************************************************
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Copyright (c) 2008-2010, 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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struct flowtable_stat {
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uint64_t ft_collisions;
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uint64_t ft_misses;
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uint64_t ft_free_checks;
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uint64_t ft_frees;
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uint64_t ft_hits;
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uint64_t ft_lookups;
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uint64_t ft_fail_lle_invalid;
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uint64_t ft_inserts;
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};
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#ifdef _KERNEL
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#define FL_HASH_ALL (1<<0) /* hash 4-tuple + protocol */
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#define FL_IPV6 (1<<9)
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#define FL_TCP (1<<11)
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#define FL_SCTP (1<<12)
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#define FL_UDP (1<<13)
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#define FL_DEBUG (1<<14)
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#define FL_DEBUG_ALL (1<<15)
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struct flowtable;
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struct flentry;
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struct route;
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struct route_in6;
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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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struct flentry *flowtable_lookup(sa_family_t, struct mbuf *);
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void flowtable_route_flush(sa_family_t, struct rtentry *);
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#ifdef INET
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void flow_to_route(struct flentry *fl, struct route *ro);
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#endif
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#ifdef INET6
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void flow_to_route_in6(struct flentry *fl, struct route_in6 *ro);
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#endif
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#endif /* _KERNEL */
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#endif /* !_NET_FLOWTABLE_H_ */
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