IVPS: Disable sync daemon for IPv6 connections

Disable the sync daemon for IPv6 connections, works only with IPv4 for now.
Signed-off-by: Julius Volz <juliusv@google.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

net/ipv4/ipvs/ip_vs_core.c

@@ -1321,7 +1321,8 @@ ip_vs_in(unsigned int hooknum, struct sk_buff *skb,
 	 * encorage the standby servers to update the connections timeout
 	 */
 	atomic_inc(&cp->in_pkts);
-	if ((ip_vs_sync_state & IP_VS_STATE_MASTER) &&
+	if (af == AF_INET &&
+	    (ip_vs_sync_state & IP_VS_STATE_MASTER) &&
 	    (((cp->protocol != IPPROTO_TCP ||
 	       cp->state == IP_VS_TCP_S_ESTABLISHED) &&
 	      (atomic_read(&cp->in_pkts) % sysctl_ip_vs_sync_threshold[1]