From 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Sat, 16 Apr 2005 15:20:36 -0700 Subject: Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! --- include/linux/namespace.h | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 include/linux/namespace.h (limited to 'include/linux/namespace.h') diff --git a/include/linux/namespace.h b/include/linux/namespace.h new file mode 100644 index 000000000000..9eca1558d72f --- /dev/null +++ b/include/linux/namespace.h @@ -0,0 +1,42 @@ +#ifndef _NAMESPACE_H_ +#define _NAMESPACE_H_ +#ifdef __KERNEL__ + +#include +#include + +struct namespace { + atomic_t count; + struct vfsmount * root; + struct list_head list; + struct rw_semaphore sem; +}; + +extern void umount_tree(struct vfsmount *); +extern int copy_namespace(int, struct task_struct *); +extern void __put_namespace(struct namespace *namespace); + +static inline void put_namespace(struct namespace *namespace) +{ + if (atomic_dec_and_test(&namespace->count)) + __put_namespace(namespace); +} + +static inline void exit_namespace(struct task_struct *p) +{ + struct namespace *namespace = p->namespace; + if (namespace) { + task_lock(p); + p->namespace = NULL; + task_unlock(p); + put_namespace(namespace); + } +} + +static inline void get_namespace(struct namespace *namespace) +{ + atomic_inc(&namespace->count); +} + +#endif +#endif -- cgit v1.2.3