diff options
Diffstat (limited to 'sys/netinet/in_rss.c')
| -rw-r--r-- | sys/netinet/in_rss.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/sys/netinet/in_rss.c b/sys/netinet/in_rss.c index f3184175a7cf..05659b97fe7c 100644 --- a/sys/netinet/in_rss.c +++ b/sys/netinet/in_rss.c @@ -152,6 +152,48 @@ rss_proto_software_hash_v4(struct in_addr s, struct in_addr d, } /* + * Calculate an appropriate ipv4 2-tuple or 4-tuple given the given + * IPv4 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. + * + * It assumes the packet source/destination address + * are in "outgoing" packet order (ie, destination is "far" address.) + */ +uint32_t +xps_proto_software_hash_v4(struct in_addr s, struct in_addr d, + u_short sp, u_short dp, int proto, 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_IPV4)) { + hash = rss_hash_ip4_4tuple(d, dp, s, sp); + *hashtype = M_HASHTYPE_RSS_TCP_IPV4; + return (hash); + } else if ((proto == IPPROTO_UDP) && + (rss_gethashconfig() & RSS_HASHTYPE_RSS_UDP_IPV4)) { + hash = rss_hash_ip4_4tuple(d, dp, s, sp); + *hashtype = M_HASHTYPE_RSS_UDP_IPV4; + return (hash); + } else if (rss_gethashconfig() & RSS_HASHTYPE_RSS_IPV4) { + /* RSS doesn't hash on other protocols like SCTP; so 2-tuple */ + hash = rss_hash_ip4_2tuple(d, s); + *hashtype = M_HASHTYPE_RSS_IPV4; + return (hash); + } + + *hashtype = M_HASHTYPE_NONE; + return (0); +} + +/* * Do a software calculation of the RSS for the given mbuf. * * This is typically used by the input path to recalculate the RSS after |