Author: adrian Date: Mon Aug 24 05:36:08 2015 New Revision: 287096 URL: https://svnweb.freebsd.org/changeset/base/287096
Log: Implement the IPv6 RSS software hash function. This isn't yet linked into the receive/transmit paths anywhere just yet. This is part of a GSoC 2015 project. Submitted by: Tiwei Bie <b...@mail.ustc.edu.cn> Reviewed by: hiren, gnn Differential Revision: https://reviews.freebsd.org/D3423 Modified: head/sys/netinet6/in6_rss.c head/sys/netinet6/in6_rss.h Modified: head/sys/netinet6/in6_rss.c ============================================================================== --- head/sys/netinet6/in6_rss.c Mon Aug 24 05:28:23 2015 (r287095) +++ head/sys/netinet6/in6_rss.c Mon Aug 24 05:36:08 2015 (r287096) @@ -101,3 +101,52 @@ rss_hash_ip6_4tuple(const struct in6_add datalen += sizeof(dstport); return (rss_hash(datalen, data)); } + +/* + * Calculate an appropriate ipv6 2-tuple or 4-tuple given the given + * IPv6 source/destination address, UDP or TCP source/destination ports + * and the protocol type. + * + * The protocol code may wish to do a software hash of the given + * tuple. This depends upon the currently configured RSS hash types. + * + * This assumes that the packet in question isn't a fragment. + * + * It also assumes the packet source/destination address + * are in "incoming" packet order (ie, source is "far" address.) + */ +int +rss_proto_software_hash_v6(const struct in6_addr *s, const struct in6_addr *d, + u_short sp, u_short dp, int proto, + uint32_t *hashval, uint32_t *hashtype) +{ + uint32_t hash; + + /* + * Next, choose the hash type depending upon the protocol + * identifier. + */ + if ((proto == IPPROTO_TCP) && + (rss_gethashconfig() & RSS_HASHTYPE_RSS_TCP_IPV6)) { + hash = rss_hash_ip6_4tuple(s, sp, d, dp); + *hashval = hash; + *hashtype = M_HASHTYPE_RSS_TCP_IPV6; + return (0); + } else if ((proto == IPPROTO_UDP) && + (rss_gethashconfig() & RSS_HASHTYPE_RSS_UDP_IPV6)) { + hash = rss_hash_ip6_4tuple(s, sp, d, dp); + *hashval = hash; + *hashtype = M_HASHTYPE_RSS_UDP_IPV6; + return (0); + } else if (rss_gethashconfig() & RSS_HASHTYPE_RSS_IPV6) { + /* RSS doesn't hash on other protocols like SCTP; so 2-tuple */ + hash = rss_hash_ip6_2tuple(s, d); + *hashval = hash; + *hashtype = M_HASHTYPE_RSS_IPV6; + return (0); + } + + /* No configured available hashtypes! */ + printf("%s: no available hashtypes!\n", __func__); + return (-1); +} Modified: head/sys/netinet6/in6_rss.h ============================================================================== --- head/sys/netinet6/in6_rss.h Mon Aug 24 05:28:23 2015 (r287095) +++ head/sys/netinet6/in6_rss.h Mon Aug 24 05:36:08 2015 (r287096) @@ -42,4 +42,12 @@ uint32_t rss_hash_ip6_4tuple(const struc uint32_t rss_hash_ip6_2tuple(const struct in6_addr *src, const struct in6_addr *dst); +/* + * Functions to calculate a software RSS hash for a given mbuf or + * packet detail. + */ +int rss_proto_software_hash_v6(const struct in6_addr *src, + const struct in6_addr *dst, u_short src_port, + u_short dst_port, int proto, uint32_t *hashval, + uint32_t *hashtype); #endif /* !_NETINET6_IN6_RSS_H_ */ _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
