#include <net/netns/xfrm.h>
#include <net/netns/mpls.h>
#include <linux/ns_common.h>
+#include <linux/idr.h>
+#include <linux/skbuff.h>
struct user_namespace;
struct proc_dir_entry;
struct list_head exit_list; /* Use only net_mutex */
struct user_namespace *user_ns; /* Owning user namespace */
+ spinlock_t nsid_lock;
struct idr netns_ids;
struct ns_common ns;