geneve: implement geneve_get_sk_family helper

Similarly to the existing vxlan_get_sk_family.
Signed-off-by: NJiri Benc <jbenc@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/geneve.c

@@ -110,6 +110,11 @@ static __be64 vni_to_tunnel_id(const __u8 *vni)
 #endif
 }
 
+static sa_family_t geneve_get_sk_family(struct geneve_sock *gs)
+{
+	return gs->sock->sk->sk_family;
+}
+
 static struct geneve_dev *geneve_lookup(struct geneve_sock *gs,
 					__be32 addr, u8 vni[])
 {
@@ -165,16 +170,13 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
 	static u8 zero_vni[3];
 	u8 *vni;
 	int err = 0;
-	sa_family_t sa_family;
 #if IS_ENABLED(CONFIG_IPV6)
 	struct ipv6hdr *ip6h = NULL;
 	struct in6_addr addr6;
 	static struct in6_addr zero_addr6;
 #endif
 
-	sa_family = gs->sock->sk->sk_family;
-
-	if (sa_family == AF_INET) {
+	if (geneve_get_sk_family(gs) == AF_INET) {
 		iph = ip_hdr(skb); /* outer IP header... */
 
 		if (gs->collect_md) {
@@ -188,7 +190,7 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
 
 		geneve = geneve_lookup(gs, addr, vni);
 #if IS_ENABLED(CONFIG_IPV6)
-	} else if (sa_family == AF_INET6) {
+	} else if (geneve_get_sk_family(gs) == AF_INET6) {
 		ip6h = ipv6_hdr(skb); /* outer IPv6 header... */
 
 		if (gs->collect_md) {
@@ -213,7 +215,7 @@ static void geneve_rx(struct geneve_sock *gs, struct sk_buff *skb)
 			(gnvh->oam ? TUNNEL_OAM : 0) |
 			(gnvh->critical ? TUNNEL_CRIT_OPT : 0);
 
-		tun_dst = udp_tun_rx_dst(skb, sa_family, flags,
+		tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags,
 					 vni_to_tunnel_id(gnvh->vni),
 					 gnvh->opt_len * 4);
 		if (!tun_dst)
@@ -392,7 +394,7 @@ static void geneve_notify_add_rx_port(struct geneve_sock *gs)
 	struct net_device *dev;
 	struct sock *sk = gs->sock->sk;
 	struct net *net = sock_net(sk);
-	sa_family_t sa_family = sk->sk_family;
+	sa_family_t sa_family = geneve_get_sk_family(gs);
 	__be16 port = inet_sk(sk)->inet_sport;
 	int err;
 
@@ -553,7 +555,7 @@ static void geneve_notify_del_rx_port(struct geneve_sock *gs)
 	struct net_device *dev;
 	struct sock *sk = gs->sock->sk;
 	struct net *net = sock_net(sk);
-	sa_family_t sa_family = sk->sk_family;
+	sa_family_t sa_family = geneve_get_sk_family(gs);
 	__be16 port = inet_sk(sk)->inet_sport;
 
 	rcu_read_lock();
@@ -596,7 +598,7 @@ static struct geneve_sock *geneve_find_sock(struct geneve_net *gn,
 
 	list_for_each_entry(gs, &gn->sock_list, list) {
 		if (inet_sk(gs->sock->sk)->inet_sport == dst_port &&
-		    inet_sk(gs->sock->sk)->sk.sk_family == family) {
+		    geneve_get_sk_family(gs) == family) {
 			return gs;
 		}
 	}