userns: Implent proc namespace operations
This allows entering a user namespace, and the ability
to store a reference to a user namespace with a bind
mount.
Addition of missing userns_ns_put in userns_install
from Gao feng <gaofeng@cn.fujitsu.com>
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
diff --git a/fs/proc/namespaces.c b/fs/proc/namespaces.c
index 2a17fd9..030250c 100644
--- a/fs/proc/namespaces.c
+++ b/fs/proc/namespaces.c
@@ -11,6 +11,7 @@
#include <net/net_namespace.h>
#include <linux/ipc_namespace.h>
#include <linux/pid_namespace.h>
+#include <linux/user_namespace.h>
#include "internal.h"
@@ -27,6 +28,9 @@
#ifdef CONFIG_PID_NS
&pidns_operations,
#endif
+#ifdef CONFIG_USER_NS
+ &userns_operations,
+#endif
&mntns_operations,
};