ipvs: Pass ipvs into ip_vs_out_icmp and ip_vs_out_icmp_v6

This removes the need to compute ipvs with the hack "net_ipvs(skb_net(skb))"
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Acked-by: Julian Anastasov <ja@ssi.bg>
Signed-off-by: Simon Horman <horms@verge.net.au>

net/netfilter/ipvs/ip_vs_core.c

@@ -897,10 +897,9 @@ static int handle_response_icmp(int af, struct sk_buff *skb,
  *	Find any that might be relevant, check against existing connections.
  *	Currently handles error types - unreachable, quench, ttl exceeded.
  */
-static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
-			  unsigned int hooknum)
+static int ip_vs_out_icmp(struct netns_ipvs *ipvs, struct sk_buff *skb,
+			  int *related, unsigned int hooknum)
 {
-	struct netns_ipvs *ipvs = net_ipvs(skb_net(skb));
 	struct iphdr *iph;
 	struct icmphdr	_icmph, *ic;
 	struct iphdr	_ciph, *cih;	/* The ip header contained within the ICMP */
@@ -973,10 +972,10 @@ static int ip_vs_out_icmp(struct sk_buff *skb, int *related,
 }
 
 #ifdef CONFIG_IP_VS_IPV6
-static int ip_vs_out_icmp_v6(struct sk_buff *skb, int *related,
-			     unsigned int hooknum, struct ip_vs_iphdr *ipvsh)
+static int ip_vs_out_icmp_v6(struct netns_ipvs *ipvs, struct sk_buff *skb,
+			     int *related,  unsigned int hooknum,
+			     struct ip_vs_iphdr *ipvsh)
 {
-	struct netns_ipvs *ipvs = net_ipvs(skb_net(skb));
 	struct icmp6hdr	_icmph, *ic;
 	struct ip_vs_iphdr ciph = {.flags = 0, .fragoffs = 0};/*Contained IP */
 	struct ip_vs_conn *cp;
@@ -1208,7 +1207,7 @@ ip_vs_out(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, in
 	if (af == AF_INET6) {
 		if (unlikely(iph.protocol == IPPROTO_ICMPV6)) {
 			int related;
-			int verdict = ip_vs_out_icmp_v6(skb, &related,
+			int verdict = ip_vs_out_icmp_v6(ipvs, skb, &related,
 							hooknum, &iph);
 
 			if (related)
@@ -1218,7 +1217,7 @@ ip_vs_out(struct netns_ipvs *ipvs, unsigned int hooknum, struct sk_buff *skb, in
 #endif
 		if (unlikely(iph.protocol == IPPROTO_ICMP)) {
 			int related;
-			int verdict = ip_vs_out_icmp(skb, &related, hooknum);
+			int verdict = ip_vs_out_icmp(ipvs, skb, &related, hooknum);
 
 			if (related)
 				return verdict;