fe267a5590
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts. No functional change intended.
154 lines
4.5 KiB
C
154 lines
4.5 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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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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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include "opt_inet6.h"
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#include "opt_rss.h"
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/socket.h>
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#include <net/rss_config.h>
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#include <netinet/in.h>
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#include <netinet/in_pcb.h>
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#ifdef INET6
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#include <netinet6/in6_pcb.h>
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#include <netinet6/in6_rss.h>
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#endif /* INET6 */
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/*
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* Given a hash of whatever the covered tuple might be, return a pcbgroup
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* index. Where RSS is supported, try to align bucket selection with RSS CPU
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* affinity strategy.
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*/
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static __inline u_int
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in6_pcbgroup_getbucket(struct inpcbinfo *pcbinfo, uint32_t hash)
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{
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#ifdef RSS
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return (rss_getbucket(hash));
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#else
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return (hash % pcbinfo->ipi_npcbgroups);
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#endif
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}
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/*
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* Map a (hashtype, hash) tuple into a connection group, or NULL if the hash
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* information is insufficient to identify the pcbgroup. This might occur if
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* a TCP packet turnsup with a 2-tuple hash, or if an RSS hash is present but
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* RSS is not compiled into the kernel.
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*/
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struct inpcbgroup *
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in6_pcbgroup_byhash(struct inpcbinfo *pcbinfo, u_int hashtype, uint32_t hash)
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{
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#ifdef RSS
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if ((pcbinfo->ipi_hashfields == IPI_HASHFIELDS_4TUPLE &&
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hashtype == M_HASHTYPE_RSS_TCP_IPV6) ||
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(pcbinfo->ipi_hashfields == IPI_HASHFIELDS_4TUPLE &&
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hashtype == M_HASHTYPE_RSS_UDP_IPV6) ||
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(pcbinfo->ipi_hashfields == IPI_HASHFIELDS_2TUPLE &&
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hashtype == M_HASHTYPE_RSS_IPV6))
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return (&pcbinfo->ipi_pcbgroups[
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in6_pcbgroup_getbucket(pcbinfo, hash)]);
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#endif
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return (NULL);
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}
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struct inpcbgroup *
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in6_pcbgroup_bymbuf(struct inpcbinfo *pcbinfo, struct mbuf *m)
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{
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return (in6_pcbgroup_byhash(pcbinfo, M_HASHTYPE_GET(m),
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m->m_pkthdr.flowid));
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}
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struct inpcbgroup *
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in6_pcbgroup_bytuple(struct inpcbinfo *pcbinfo, const struct in6_addr *laddrp,
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u_short lport, const struct in6_addr *faddrp, u_short fport)
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{
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uint32_t hash;
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/*
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* RSS note: we pass foreign addr/port as source, and local addr/port
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* as destination, as we want to align with what the hardware is
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* doing.
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*/
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switch (pcbinfo->ipi_hashfields) {
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case IPI_HASHFIELDS_4TUPLE:
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#ifdef RSS
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hash = rss_hash_ip6_4tuple(faddrp, fport, laddrp, lport);
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#else
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hash = faddrp->s6_addr32[3] ^ fport;
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#endif
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break;
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case IPI_HASHFIELDS_2TUPLE:
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#ifdef RSS
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hash = rss_hash_ip6_2tuple(faddrp, laddrp);
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#else
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hash = faddrp->s6_addr32[3] ^ laddrp->s6_addr32[3];
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#endif
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break;
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default:
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hash = 0;
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}
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return (&pcbinfo->ipi_pcbgroups[in6_pcbgroup_getbucket(pcbinfo,
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hash)]);
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}
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struct inpcbgroup *
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in6_pcbgroup_byinpcb(struct inpcb *inp)
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{
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#ifdef RSS
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/*
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* Listen sockets with INP_RSS_BUCKET_SET set have a pre-determined
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* RSS bucket and thus we should use this pcbgroup, rather than
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* using a tuple or hash.
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*
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* XXX should verify that there's actually pcbgroups and inp_rss_listen_bucket
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* fits in that!
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*/
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if (inp->inp_flags2 & INP_RSS_BUCKET_SET)
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return (&inp->inp_pcbinfo->ipi_pcbgroups[inp->inp_rss_listen_bucket]);
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#endif
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return (in6_pcbgroup_bytuple(inp->inp_pcbinfo, &inp->in6p_laddr,
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inp->inp_lport, &inp->in6p_faddr, inp->inp_fport));
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}
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