Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | #ifndef _NAMESPACE_H_ |
2 | #define _NAMESPACE_H_ | |
3 | #ifdef __KERNEL__ | |
4 | ||
5 | #include <linux/mount.h> | |
6 | #include <linux/sched.h> | |
1651e14e | 7 | #include <linux/nsproxy.h> |
1da177e4 LT |
8 | |
9 | struct namespace { | |
10 | atomic_t count; | |
11 | struct vfsmount * root; | |
12 | struct list_head list; | |
5addc5dd AV |
13 | wait_queue_head_t poll; |
14 | int event; | |
1da177e4 LT |
15 | }; |
16 | ||
1da177e4 LT |
17 | extern int copy_namespace(int, struct task_struct *); |
18 | extern void __put_namespace(struct namespace *namespace); | |
741a2951 | 19 | extern struct namespace *dup_namespace(struct task_struct *, struct fs_struct *); |
1da177e4 LT |
20 | |
21 | static inline void put_namespace(struct namespace *namespace) | |
22 | { | |
1ce88cf4 MS |
23 | if (atomic_dec_and_lock(&namespace->count, &vfsmount_lock)) |
24 | /* releases vfsmount_lock */ | |
1da177e4 LT |
25 | __put_namespace(namespace); |
26 | } | |
27 | ||
28 | static inline void exit_namespace(struct task_struct *p) | |
29 | { | |
1651e14e | 30 | struct namespace *namespace = p->nsproxy->namespace; |
1da177e4 | 31 | if (namespace) { |
1da177e4 LT |
32 | put_namespace(namespace); |
33 | } | |
34 | } | |
35 | ||
36 | static inline void get_namespace(struct namespace *namespace) | |
37 | { | |
38 | atomic_inc(&namespace->count); | |
39 | } | |
40 | ||
41 | #endif | |
42 | #endif |