The branch main has been updated by pouria: URL: https://cgit.FreeBSD.org/src/commit/?id=283ef95d1677b873903f8b8fa077fbfa3a5e0036
commit 283ef95d1677b873903f8b8fa077fbfa3a5e0036 Author: bigJ <[email protected]> AuthorDate: 2026-03-01 20:14:49 +0000 Commit: Pouria Mousavizadeh Tehrani <[email protected]> CommitDate: 2026-03-16 08:52:35 +0000 rss_config: Add option to enable rss udp hashing Added optional system tunable parameter to enable 4-tuple rss udp hashing. Signed-off-by: bigJ <[email protected]> Reviewed by: adrian, pouria Pull Request: https://github.com/freebsd/freebsd-src/pull/2057 --- sys/net/rss_config.c | 34 ++++++++++++++++++++++------------ 1 file changed, 22 insertions(+), 12 deletions(-) diff --git a/sys/net/rss_config.c b/sys/net/rss_config.c index 5be5aecd15d9..9b805085d5ce 100644 --- a/sys/net/rss_config.c +++ b/sys/net/rss_config.c @@ -150,6 +150,11 @@ int rss_debug = 0; SYSCTL_INT(_net_inet_rss, OID_AUTO, debug, CTLFLAG_RWTUN, &rss_debug, 0, "RSS debug level"); +static u_int rss_udp_4tuple = 0; +SYSCTL_INT(_net_inet_rss, OID_AUTO, udp_4tuple, CTLFLAG_RDTUN, + &rss_udp_4tuple, 0, + "Enable UDP 4-tuple RSS hashing (src/dst IP + src/dst port)"); + /* * RSS secret key, intended to prevent attacks on load-balancing. Its * effectiveness may be limited by algorithm choice and available entropy @@ -488,19 +493,24 @@ rss_gethashconfig(void) * So for now disable UDP 4-tuple hashing until all of the other * pieces are in place. */ - return ( + u_int config; + + config = RSS_HASHTYPE_RSS_IPV4 - | RSS_HASHTYPE_RSS_TCP_IPV4 - | RSS_HASHTYPE_RSS_IPV6 - | RSS_HASHTYPE_RSS_TCP_IPV6 - | RSS_HASHTYPE_RSS_IPV6_EX - | RSS_HASHTYPE_RSS_TCP_IPV6_EX -#if 0 - | RSS_HASHTYPE_RSS_UDP_IPV4 - | RSS_HASHTYPE_RSS_UDP_IPV6 - | RSS_HASHTYPE_RSS_UDP_IPV6_EX -#endif - ); + | RSS_HASHTYPE_RSS_TCP_IPV4 + | RSS_HASHTYPE_RSS_IPV6 + | RSS_HASHTYPE_RSS_TCP_IPV6 + | RSS_HASHTYPE_RSS_IPV6_EX + | RSS_HASHTYPE_RSS_TCP_IPV6_EX; + + if (rss_udp_4tuple) { + config |= + RSS_HASHTYPE_RSS_UDP_IPV4 + | RSS_HASHTYPE_RSS_UDP_IPV6 + | RSS_HASHTYPE_RSS_UDP_IPV6_EX; + } + + return (config); } /*
