2 * Copyright (C) 2006 IBM Corporation
4 * Author: Serge Hallyn <serue@us.ibm.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2 of the
12 #include <linux/module.h>
13 #include <linux/version.h>
14 #include <linux/nsproxy.h>
15 #include <linux/init_task.h>
17 struct nsproxy init_nsproxy = INIT_NSPROXY(init_nsproxy);
19 static inline void get_nsproxy(struct nsproxy *ns)
21 atomic_inc(&ns->count);
24 void get_task_namespaces(struct task_struct *tsk)
26 struct nsproxy *ns = tsk->nsproxy;
33 * creates a copy of "orig" with refcount 1.
34 * This does not grab references to the contained namespaces,
35 * so that needs to be done by dup_namespaces.
37 static inline struct nsproxy *clone_namespaces(struct nsproxy *orig)
41 ns = kmalloc(sizeof(struct nsproxy), GFP_KERNEL);
43 memcpy(ns, orig, sizeof(struct nsproxy));
44 atomic_set(&ns->count, 1);
50 * copies the nsproxy, setting refcount to 1, and grabbing a
51 * reference to all contained namespaces. Called from
54 struct nsproxy *dup_namespaces(struct nsproxy *orig)
56 struct nsproxy *ns = clone_namespaces(orig);
62 * called from clone. This now handles copy for nsproxy and all
65 int copy_namespaces(int flags, struct task_struct *tsk)
67 struct nsproxy *old_ns = tsk->nsproxy;
77 void free_nsproxy(struct nsproxy *ns)