[PATCH 2/7] nf: initialization of ipv4 defragmentation users counter

[Vasily Averin <vvs@parallels.com>]

Signed-off-by: Vasily Averin <vvs@openvz.org>
---
 net/ipv4/netfilter/nf_defrag_ipv4.c |   32 +++++++++++++++++++++++++++++++-
 1 files changed, 31 insertions(+), 1 deletions(-)

diff --git a/net/ipv4/netfilter/nf_defrag_ipv4.c b/net/ipv4/netfilter/nf_defrag_ipv4.c
index f40f321..f82685c 100644
--- a/net/ipv4/netfilter/nf_defrag_ipv4.c
+++ b/net/ipv4/netfilter/nf_defrag_ipv4.c
@@ -110,14 +110,44 @@ static struct nf_hook_ops ipv4_defrag_ops[] = {
 	},
 };
 
+static int nf_defrag_ipv4_net_init(struct net *net)
+{
+	atomic_set(&net->br_defrag_ipv4_users_count, 0);
+	return 0;
+}
+
+static void nf_defrag_ipv4_net_exit(struct net *net)
+{
+	if (unlikely(atomic_read(&net->br_defrag_ipv4_users_count) != 0)) {
+		pr_warn("net %p cleanup: br_defrag_users_count = %d\n",
+			net, atomic_read(&net->br_defrag_ipv4_users_count));
+	}
+}
+
+static struct pernet_operations nf_defrag_ipv4_net_ops = {
+	.init = nf_defrag_ipv4_net_init,
+	.exit = nf_defrag_ipv4_net_exit,
+};
+
 static int __init nf_defrag_init(void)
 {
-	return nf_register_hooks(ipv4_defrag_ops, ARRAY_SIZE(ipv4_defrag_ops));
+	int ret = 0;
+
+	ret = register_pernet_subsys(&nf_defrag_ipv4_net_ops);
+	if (ret)
+		goto out;
+
+	ret = nf_register_hooks(ipv4_defrag_ops, ARRAY_SIZE(ipv4_defrag_ops));
+	if (ret)
+		unregister_pernet_subsys(&nf_defrag_ipv4_net_ops);
+out:
+	return ret;
 }
 
 static void __exit nf_defrag_fini(void)
 {
 	nf_unregister_hooks(ipv4_defrag_ops, ARRAY_SIZE(ipv4_defrag_ops));
+	unregister_pernet_subsys(&nf_defrag_ipv4_net_ops);
 }
 
 void nf_defrag_ipv4_enable(void)
-- 
1.7.5.4