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> | |
7 | ||
8 | struct namespace { | |
9 | atomic_t count; | |
10 | struct vfsmount * root; | |
11 | struct list_head list; | |
5addc5dd AV |
12 | wait_queue_head_t poll; |
13 | int event; | |
1da177e4 LT |
14 | }; |
15 | ||
1da177e4 LT |
16 | extern int copy_namespace(int, struct task_struct *); |
17 | extern void __put_namespace(struct namespace *namespace); | |
18 | ||
19 | static inline void put_namespace(struct namespace *namespace) | |
20 | { | |
1ce88cf4 MS |
21 | if (atomic_dec_and_lock(&namespace->count, &vfsmount_lock)) |
22 | /* releases vfsmount_lock */ | |
1da177e4 LT |
23 | __put_namespace(namespace); |
24 | } | |
25 | ||
26 | static inline void exit_namespace(struct task_struct *p) | |
27 | { | |
28 | struct namespace *namespace = p->namespace; | |
29 | if (namespace) { | |
30 | task_lock(p); | |
31 | p->namespace = NULL; | |
32 | task_unlock(p); | |
33 | put_namespace(namespace); | |
34 | } | |
35 | } | |
36 | ||
37 | static inline void get_namespace(struct namespace *namespace) | |
38 | { | |
39 | atomic_inc(&namespace->count); | |
40 | } | |
41 | ||
42 | #endif | |
43 | #endif |