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0e778c88c9
Some of the collisions that are occuring are due to flowtable lookups that succeed but have an invalid lle - typically because the L2 adjacency lookup hasn't completed. This would lead to a follow-up insert which would then fail (ie, collision) and the code would fall through to doing a slow-path L2/L3 lookup in the netinet/netinet6 code. This patch simply aborts storing a new flowtable entry if the lle isn't yet valid. Whilst I'm here, add a new pcpu counter for the item so the number of failures can be tracked separately from generic "collisions." Reviewed by: glebius MFC after: 10 days Sponsored by: Netflix, Inc.
78 lines
2.4 KiB
C
78 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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};
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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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