netfilter: netns nat: per-netns bysource hash

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/net/netns/ipv4.h b/include/net/netns/ipv4.h
index b286b84..ece1c92 100644
--- a/include/net/netns/ipv4.h
+++ b/include/net/netns/ipv4.h
@@ -39,6 +39,8 @@
 	struct xt_table		*arptable_filter;
 	struct xt_table		*iptable_security;
 	struct xt_table		*nat_table;
+	struct hlist_head	*nat_bysource;
+	int			nat_vmalloced;
 #endif
 
 	int sysctl_icmp_echo_ignore_all;