Merge sys_clone()/sys_unshare() nsproxy and namespace handling

[safe/jmp/linux-2.6] / include / linux / nsproxy.h

diff --git a/include/linux/nsproxy.h b/include/linux/nsproxy.h
index 678e1d3..189e0dc 100644 (file)
--- a/include/linux/nsproxy.h
+++ b/include/linux/nsproxy.h
@@ -31,34 +31,27 @@ struct nsproxy {
 };
 extern struct nsproxy init_nsproxy;
 
-struct nsproxy *dup_namespaces(struct nsproxy *orig);
 int copy_namespaces(int flags, struct task_struct *tsk);
 void get_task_namespaces(struct task_struct *tsk);
 void free_nsproxy(struct nsproxy *ns);
-struct nsproxy *put_nsproxy(struct nsproxy *ns);
+int unshare_nsproxy_namespaces(unsigned long, struct nsproxy **,
+       struct fs_struct *);
 
-static inline void finalize_put_nsproxy(struct nsproxy *ns)
+static inline void put_nsproxy(struct nsproxy *ns)
 {
-       if (ns)
+       if (atomic_dec_and_test(&ns->count)) {
                free_nsproxy(ns);
+       }
 }
 
-static inline void put_and_finalize_nsproxy(struct nsproxy *ns)
+static inline void exit_task_namespaces(struct task_struct *p)
 {
-       finalize_put_nsproxy(put_nsproxy(ns));
-}
-
-static inline struct nsproxy *preexit_task_namespaces(struct task_struct *p)
-{
-       return put_nsproxy(p->nsproxy);
-}
-
-static inline void exit_task_namespaces(struct task_struct *p,
-                                               struct nsproxy *ns)
-{
-       task_lock(p);
-       p->nsproxy = NULL;
-       task_unlock(p);
-       finalize_put_nsproxy(ns);
+       struct nsproxy *ns = p->nsproxy;
+       if (ns) {
+               task_lock(p);
+               p->nsproxy = NULL;
+               task_unlock(p);
+               put_nsproxy(ns);
+       }
 }
 #endif