Index: head/sys/netinet6/in6.h
===================================================================
--- head/sys/netinet6/in6.h
+++ head/sys/netinet6/in6.h
@@ -485,6 +485,8 @@
 #define	IPV6_FLOWID		67 /* int; flowid of given socket */
 #define	IPV6_FLOWTYPE		68 /* int; flowtype of given socket */
 #define	IPV6_RSSBUCKETID	69 /* int; RSS bucket ID of given socket */
+#define	IPV6_RECVFLOWID		70 /* bool; receive IP6 flowid/flowtype w/ datagram */
+#define	IPV6_RECVRSSBUCKETID	71 /* bool; receive IP6 RSS bucket id w/ datagram */
 
 /*
  * The following option is private; do not use it from user applications.
Index: head/sys/netinet6/ip6_input.c
===================================================================
--- head/sys/netinet6/ip6_input.c
+++ head/sys/netinet6/ip6_input.c
@@ -93,6 +93,7 @@
 #include <net/if_dl.h>
 #include <net/route.h>
 #include <net/netisr.h>
+#include <net/rss_config.h>
 #include <net/pfil.h>
 #include <net/vnet.h>
 
@@ -1349,6 +1350,44 @@
 	  loopend:
 		;
 	}
+
+	if (in6p->inp_flags2 & INP_RECVFLOWID) {
+		uint32_t flowid, flow_type;
+
+		flowid = m->m_pkthdr.flowid;
+		flow_type = M_HASHTYPE_GET(m);
+
+		/*
+		 * XXX should handle the failure of one or the
+		 * other - don't populate both?
+		 */
+		*mp = sbcreatecontrol((caddr_t) &flowid,
+		    sizeof(uint32_t), IPV6_FLOWID, IPPROTO_IPV6);
+		if (*mp)
+			mp = &(*mp)->m_next;
+		*mp = sbcreatecontrol((caddr_t) &flow_type,
+		    sizeof(uint32_t), IPV6_FLOWTYPE, IPPROTO_IPV6);
+		if (*mp)
+			mp = &(*mp)->m_next;
+	}
+
+#ifdef	RSS
+	if (in6p->inp_flags2 & INP_RECVRSSBUCKETID) {
+		uint32_t flowid, flow_type;
+		uint32_t rss_bucketid;
+
+		flowid = m->m_pkthdr.flowid;
+		flow_type = M_HASHTYPE_GET(m);
+
+		if (rss_hash2bucket(flowid, flow_type, &rss_bucketid) == 0) {
+			*mp = sbcreatecontrol((caddr_t) &rss_bucketid,
+			   sizeof(uint32_t), IPV6_RSSBUCKETID, IPPROTO_IPV6);
+			if (*mp)
+				mp = &(*mp)->m_next;
+		}
+	}
+#endif
+
 }
 #undef IS2292
 
Index: head/sys/netinet6/ip6_output.c
===================================================================
--- head/sys/netinet6/ip6_output.c
+++ head/sys/netinet6/ip6_output.c
@@ -1400,6 +1400,10 @@
 			case IPV6_RECVRTHDR:
 			case IPV6_RECVPATHMTU:
 			case IPV6_RECVTCLASS:
+			case IPV6_RECVFLOWID:
+#ifdef	RSS
+			case IPV6_RECVRSSBUCKETID:
+#endif
 			case IPV6_V6ONLY:
 			case IPV6_AUTOFLOWLABEL:
 			case IPV6_BINDANY:
@@ -1548,6 +1552,16 @@
 						OPTSET(IN6P_MTU);
 					break;
 
+				case IPV6_RECVFLOWID:
+					OPTSET2(INP_RECVFLOWID, optval);
+					break;
+
+#ifdef	RSS
+				case IPV6_RECVRSSBUCKETID:
+					OPTSET2(INP_RECVRSSBUCKETID, optval);
+					break;
+#endif
+
 				case IPV6_V6ONLY:
 					/*
 					 * make setsockopt(IPV6_V6ONLY)
@@ -1811,8 +1825,10 @@
 			case IPV6_BINDANY:
 			case IPV6_FLOWID:
 			case IPV6_FLOWTYPE:
+			case IPV6_RECVFLOWID:
 #ifdef	RSS
 			case IPV6_RSSBUCKETID:
+			case IPV6_RECVRSSBUCKETID:
 #endif
 				switch (optname) {
 
@@ -1883,6 +1899,10 @@
 				case IPV6_FLOWTYPE:
 					optval = in6p->inp_flowtype;
 					break;
+
+				case IPV6_RECVFLOWID:
+					optval = OPTBIT2(INP_RECVFLOWID);
+					break;
 #ifdef	RSS
 				case IPV6_RSSBUCKETID:
 					retval =
@@ -1894,6 +1914,10 @@
 					else
 						error = EINVAL;
 					break;
+
+				case IPV6_RECVRSSBUCKETID:
+					optval = OPTBIT2(INP_RECVRSSBUCKETID);
+					break;
 #endif
 
 				case IPV6_BINDMULTI: