netfilter: netns nf_conntrack: per-netns statistics

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
diff --git a/include/net/netns/conntrack.h b/include/net/netns/conntrack.h
index 9d5c162..fc0a46d 100644
--- a/include/net/netns/conntrack.h
+++ b/include/net/netns/conntrack.h
@@ -12,6 +12,7 @@
 	struct hlist_head	*hash;
 	struct hlist_head	*expect_hash;
 	struct hlist_head	unconfirmed;
+	struct ip_conntrack_stat *stat;
 #ifdef CONFIG_NF_CONNTRACK_EVENTS
 	struct nf_conntrack_ecache *ecache;
 #endif