net/openvswitch/flow.c

385 static int parse_ipv6hdr(struct sk_buff *skb, struct sw_flow_key *key)
400 	get_ipv6_ext_hdrs(skb, nh, &key->ipv6.exthdrs);
402 	key->ip.proto = NEXTHDR_NONE;
403 	key->ip.tos = ipv6_get_dsfield(nh);
404 	key->ip.ttl = nh->hop_limit;
405 	key->ipv6.label = *(__be32 *)nh & htonl(IPV6_FLOWINFO_FLOWLABEL);
406 	key->ipv6.addr.src = nh->saddr;
407 	key->ipv6.addr.dst = nh->daddr;
412 			key->ip.frag = OVS_FRAG_TYPE_LATER;
413 			key->ip.proto = NEXTHDR_FRAGMENT;
416 		key->ip.frag = OVS_FRAG_TYPE_FIRST;
418 		key->ip.frag = OVS_FRAG_TYPE_NONE;
423 	 * used to set key->ip.frag above.
430 	key->ip.proto = nexthdr;
486 static void clear_vlan(struct sw_flow_key *key)
488 	key->eth.vlan.tci = 0;
489 	key->eth.vlan.tpid = 0;
490 	key->eth.cvlan.tci = 0;
491 	key->eth.cvlan.tpid = 0;
494 static int parse_vlan(struct sk_buff *skb, struct sw_flow_key *key)
499 		key->eth.vlan.tci = htons(skb->vlan_tci) | htons(VLAN_CFI_MASK);
500 		key->eth.vlan.tpid = skb->vlan_proto;
503 		res = parse_vlan_tag(skb, &key->eth.vlan, true);
509 	res = parse_vlan_tag(skb, &key->eth.cvlan, false);
554 static int parse_icmpv6(struct sk_buff *skb, struct sw_flow_key *key,
562 	key->tp.src = htons(icmp->icmp6_type);
563 	key->tp.dst = htons(icmp->icmp6_code);
564 	memset(&key->ipv6.nd, 0, sizeof(key->ipv6.nd));
583 		key->ipv6.nd.target = nd->target;
601 				if (unlikely(!is_zero_ether_addr(key->ipv6.nd.sll)))
603 				ether_addr_copy(key->ipv6.nd.sll,
607 				if (unlikely(!is_zero_ether_addr(key->ipv6.nd.tll)))
609 				ether_addr_copy(key->ipv6.nd.tll,
621 	memset(&key->ipv6.nd.target, 0, sizeof(key->ipv6.nd.target));
622 	memset(key->ipv6.nd.sll, 0, sizeof(key->ipv6.nd.sll));
623 	memset(key->ipv6.nd.tll, 0, sizeof(key->ipv6.nd.tll));
628 static int parse_nsh(struct sk_buff *skb, struct sw_flow_key *key)
651 	key->nsh.base.flags = nsh_get_flags(nh);
652 	key->nsh.base.ttl = nsh_get_ttl(nh);
653 	key->nsh.base.mdtype = nh->mdtype;
654 	key->nsh.base.np = nh->np;
655 	key->nsh.base.path_hdr = nh->path_hdr;
656 	switch (key->nsh.base.mdtype) {
660 		memcpy(key->nsh.context, nh->md1.context,
664 		memset(key->nsh.context, 0,
678  * @key: output flow key
682 static int key_extract_l3l4(struct sk_buff *skb, struct sw_flow_key *key)
687 	if (key->eth.type == htons(ETH_P_IP)) {
693 			memset(&key->ip, 0, sizeof(key->ip));
694 			memset(&key->ipv4, 0, sizeof(key->ipv4));
703 		key->ipv4.addr.src = nh->saddr;
704 		key->ipv4.addr.dst = nh->daddr;
706 		key->ip.proto = nh->protocol;
707 		key->ip.tos = nh->tos;
708 		key->ip.ttl = nh->ttl;
712 			key->ip.frag = OVS_FRAG_TYPE_LATER;
713 			memset(&key->tp, 0, sizeof(key->tp));
718 			key->ip.frag = OVS_FRAG_TYPE_FIRST;
720 			key->ip.frag = OVS_FRAG_TYPE_NONE;
723 		if (key->ip.proto == IPPROTO_TCP) {
726 				key->tp.src = tcp->source;
727 				key->tp.dst = tcp->dest;
728 				key->tp.flags = TCP_FLAGS_BE16(tcp);
730 				memset(&key->tp, 0, sizeof(key->tp));
733 		} else if (key->ip.proto == IPPROTO_UDP) {
736 				key->tp.src = udp->source;
737 				key->tp.dst = udp->dest;
739 				memset(&key->tp, 0, sizeof(key->tp));
741 		} else if (key->ip.proto == IPPROTO_SCTP) {
744 				key->tp.src = sctp->source;
745 				key->tp.dst = sctp->dest;
747 				memset(&key->tp, 0, sizeof(key->tp));
749 		} else if (key->ip.proto == IPPROTO_ICMP) {
755 				key->tp.src = htons(icmp->type);
756 				key->tp.dst = htons(icmp->code);
758 				memset(&key->tp, 0, sizeof(key->tp));
762 	} else if (key->eth.type == htons(ETH_P_ARP) ||
763 		   key->eth.type == htons(ETH_P_RARP)) {
777 				key->ip.proto = ntohs(arp->ar_op);
779 				key->ip.proto = 0;
781 			memcpy(&key->ipv4.addr.src, arp->ar_sip, sizeof(key->ipv4.addr.src));
782 			memcpy(&key->ipv4.addr.dst, arp->ar_tip, sizeof(key->ipv4.addr.dst));
783 			ether_addr_copy(key->ipv4.arp.sha, arp->ar_sha);
784 			ether_addr_copy(key->ipv4.arp.tha, arp->ar_tha);
786 			memset(&key->ip, 0, sizeof(key->ip));
787 			memset(&key->ipv4, 0, sizeof(key->ipv4));
789 	} else if (eth_p_mpls(key->eth.type)) {
792 		memset(&key->mpls, 0, sizeof(key->mpls));
805 				memcpy(&key->mpls.lse[label_count - 1], &lse,
818 		key->mpls.num_labels_mask = GENMASK(label_count - 1, 0);
819 	} else if (key->eth.type == htons(ETH_P_IPV6)) {
822 		nh_len = parse_ipv6hdr(skb, key);
826 				memset(&key->ip, 0, sizeof(key->ip));
827 				memset(&key->ipv6.addr, 0, sizeof(key->ipv6.addr));
839 		if (key->ip.frag == OVS_FRAG_TYPE_LATER) {
840 			memset(&key->tp, 0, sizeof(key->tp));
844 			key->ip.frag = OVS_FRAG_TYPE_FIRST;
847 		if (key->ip.proto == NEXTHDR_TCP) {
850 				key->tp.src = tcp->source;
851 				key->tp.dst = tcp->dest;
852 				key->tp.flags = TCP_FLAGS_BE16(tcp);
854 				memset(&key->tp, 0, sizeof(key->tp));
856 		} else if (key->ip.proto == NEXTHDR_UDP) {
859 				key->tp.src = udp->source;
860 				key->tp.dst = udp->dest;
862 				memset(&key->tp, 0, sizeof(key->tp));
864 		} else if (key->ip.proto == NEXTHDR_SCTP) {
867 				key->tp.src = sctp->source;
868 				key->tp.dst = sctp->dest;
870 				memset(&key->tp, 0, sizeof(key->tp));
872 		} else if (key->ip.proto == NEXTHDR_ICMP) {
874 				error = parse_icmpv6(skb, key, nh_len);
878 				memset(&key->tp, 0, sizeof(key->tp));
881 	} else if (key->eth.type == htons(ETH_P_NSH)) {
882 		error = parse_nsh(skb, key);
890  * key_extract - extracts a flow key from an Ethernet frame.
893  * @key: output flow key
904  *    - skb->transport_header: If key->eth.type is ETH_P_IP or ETH_P_IPV6
907  *      For other key->eth.type values it is left untouched.
910  *      Equals to key->eth.type.
914 static int key_extract(struct sk_buff *skb, struct sw_flow_key *key)
919 	key->tp.flags = 0;
924 	clear_vlan(key);
925 	if (ovs_key_mac_proto(key) == MAC_PROTO_NONE) {
930 		key->eth.type = skb->protocol;
933 		ether_addr_copy(key->eth.src, eth->h_source);
934 		ether_addr_copy(key->eth.dst, eth->h_dest);
941 		if (unlikely(parse_vlan(skb, key)))
944 		key->eth.type = parse_ethertype(skb);
945 		if (unlikely(key->eth.type == htons(0)))
952 		if (key->eth.cvlan.tci & htons(VLAN_CFI_MASK))
953 			skb->protocol = key->eth.cvlan.tpid;
955 			skb->protocol = key->eth.type;
963 	/* Fill out L3/L4 key info, if any */
964 	return key_extract_l3l4(skb, key);
970 int ovs_flow_key_update_l3l4(struct sk_buff *skb, struct sw_flow_key *key)
972 	return key_extract_l3l4(skb, key);
975 int ovs_flow_key_update(struct sk_buff *skb, struct sw_flow_key *key)
979 	res = key_extract(skb, key);
981 		key->mac_proto &= ~SW_FLOW_KEY_INVALID;
1001 			 struct sk_buff *skb, struct sw_flow_key *key)
1012 		key->tun_proto = ip_tunnel_info_af(tun_info);
1013 		memcpy(&key->tun_key, &tun_info->key, sizeof(key->tun_key));
1018 					> sizeof(key->tun_opts));
1020 			ip_tunnel_info_opts_get(TUN_METADATA_OPTS(key, tun_info->options_len),
1022 			key->tun_opts_len = tun_info->options_len;
1024 			key->tun_opts_len = 0;
1027 		key->tun_proto = 0;
1028 		key->tun_opts_len = 0;
1029 		memset(&key->tun_key, 0, sizeof(key->tun_key));
1032 	key->phy.priority = skb->priority;
1033 	key->phy.in_port = OVS_CB(skb)->input_vport->port_no;
1034 	key->phy.skb_mark = skb->mark;
1035 	key->ovs_flow_hash = 0;
1039 	key->mac_proto = res;
1044 		key->recirc_id = tc_ext && !tc_ext->act_miss ?
1052 		key->recirc_id = 0;
1055 	key->recirc_id = 0;
1058 	err = key_extract(skb, key);
1060 		ovs_ct_fill_key(skb, key, post_ct);   /* Must be after key_extract(). */
1063 				key->ct_zone = zone;
1066 					key->ct_state &= ~OVS_CS_F_DST_NAT;
1068 					key->ct_state &= ~OVS_CS_F_SRC_NAT;
1077 				   struct sw_flow_key *key, bool log)
1088 	err = ovs_nla_get_flow_metadata(net, a, attrs, key, log);
1097 	 * For L2 packet key eth type would be zero. skb protocol
1098 	 * would be set to correct value later during key-extact.
1101 	skb->protocol = key->eth.type;
1102 	err = key_extract(skb, key);
1107 	 * for packets for which it makes sense.  Otherwise the key may be
1108 	 * corrupted due to overlapping key fields.
1111 	    key->eth.type != htons(ETH_P_IP))
1114 	    (key->eth.type != htons(ETH_P_IPV6) ||
1115 	     sw_flow_key_is_nd(key)))