0be189151f
This mirrors the basic IPv4 implementation - IPv6 packets under RSS now are checked for a correct RSS hash and if one isn't provided, it's done in software. This only handles the initial receive - it doesn't yet handle reinjecting / rehashing packets after being decapsulated from various tunneling setups. That'll come in some follow-up work. For non-RSS users, this is almost a giant no-op. It does change a couple of ipv6 methods to use const mbuf * instead of mbuf * but it doesn't have any functional changes. So, the following now occurs: * If the NIC doesn't do any RSS hashing, it's all done in software. Single-queue, non-RSS NICs will now have the RX path distributed into multiple receive netisr queues. * If the NIC provides the wrong hash (eg only IPv6 hash when we needed an IPv6 TCP hash, or IPv6 UDP hash when we expected IPv6 hash) then the hash is recalculated. * .. if the hash is recalculated, it'll end up being injected into the correct netisr queue for v6 processing. Submitted by: Tiwei Bie <btw@mail.ustc.edu.cn> Differential Revision: https://reviews.freebsd.org/D3504
59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
/*-
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* Copyright (c) 2010-2011 Juniper Networks, Inc.
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* All rights reserved.
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*
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* This software was developed by Robert N. M. Watson under contract
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* to Juniper Networks, Inc.
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*
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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
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* 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 AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _NETINET6_IN6_RSS_H_
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#define _NETINET6_IN6_RSS_H_
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#include <netinet/in.h> /* in_addr_t */
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/*
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* Network stack interface to generate a hash for a protocol tuple.
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*/
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uint32_t rss_hash_ip6_4tuple(const struct in6_addr *src, u_short srcport,
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const struct in6_addr *dst, u_short dstport);
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uint32_t rss_hash_ip6_2tuple(const struct in6_addr *src,
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const struct in6_addr *dst);
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/*
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* Functions to calculate a software RSS hash for a given mbuf or
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* packet detail.
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*/
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int rss_mbuf_software_hash_v6(const struct mbuf *m, int dir,
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uint32_t *hashval, uint32_t *hashtype);
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int rss_proto_software_hash_v6(const struct in6_addr *src,
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const struct in6_addr *dst, u_short src_port,
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u_short dst_port, int proto, uint32_t *hashval,
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uint32_t *hashtype);
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struct mbuf * rss_soft_m2cpuid_v6(struct mbuf *m, uintptr_t source,
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u_int *cpuid);
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#endif /* !_NETINET6_IN6_RSS_H_ */
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