netfilter: nf_conntrack: calculate per-protocol nlattr size

Signed-off-by: Holger Eitzenberger <holger@eitzenberger.org>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
index 2a8bee2..23b2c2e 100644
--- a/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
+++ b/net/ipv4/netfilter/nf_conntrack_proto_icmp.c
@@ -262,6 +262,11 @@
 
 	return 0;
 }
+
+static int icmp_nlattr_tuple_size(void)
+{
+	return nla_policy_len(icmp_nla_policy, CTA_PROTO_MAX + 1);
+}
 #endif
 
 #ifdef CONFIG_SYSCTL
@@ -309,6 +314,7 @@
 	.me			= NULL,
 #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE)
 	.tuple_to_nlattr	= icmp_tuple_to_nlattr,
+	.nlattr_tuple_size	= icmp_nlattr_tuple_size,
 	.nlattr_to_tuple	= icmp_nlattr_to_tuple,
 	.nla_policy		= icmp_nla_policy,
 #endif