ns proc: Add support for the network namespace.

[karo-tx-linux.git] / net / core / net_namespace.c

diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c
index 3f860261c5eea2be402ed0556a3a8b3f6fd7fc9b..bf7707e09a8086d8e36105c1cd8900568bbfb24e 100644 (file)
--- a/net/core/net_namespace.c
+++ b/net/core/net_namespace.c
@@ -573,3 +573,34 @@ void unregister_pernet_device(struct pernet_operations *ops)
        mutex_unlock(&net_mutex);
 }
 EXPORT_SYMBOL_GPL(unregister_pernet_device);
+
+#ifdef CONFIG_NET_NS
+static void *netns_get(struct task_struct *task)
+{
+       struct net *net;
+       rcu_read_lock();
+       net = get_net(task->nsproxy->net_ns);
+       rcu_read_unlock();
+       return net;
+}
+
+static void netns_put(void *ns)
+{
+       put_net(ns);
+}
+
+static int netns_install(struct nsproxy *nsproxy, void *ns)
+{
+       put_net(nsproxy->net_ns);
+       nsproxy->net_ns = get_net(ns);
+       return 0;
+}
+
+const struct proc_ns_operations netns_operations = {
+       .name           = "net",
+       .type           = CLONE_NEWNET,
+       .get            = netns_get,
+       .put            = netns_put,
+       .install        = netns_install,
+};
+#endif