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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 422 | giacomo | 1 | #ifndef _NAMESPACE_H_ |
| 2 | #define _NAMESPACE_H_ |
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| 3 | #ifdef __KERNEL__ |
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| 4 | |||
| 5 | #include <linux/mount.h> |
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| 6 | #include <linux/sched.h> |
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| 7 | |||
| 8 | struct namespace { |
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| 9 | atomic_t count; |
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| 10 | struct vfsmount * root; |
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| 11 | struct list_head list; |
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| 12 | struct rw_semaphore sem; |
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| 13 | }; |
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| 14 | |||
| 15 | extern void umount_tree(struct vfsmount *); |
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| 16 | extern int copy_namespace(int, struct task_struct *); |
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| 17 | void __put_namespace(struct namespace *namespace); |
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| 18 | |||
| 19 | static inline void put_namespace(struct namespace *namespace) |
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| 20 | { |
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| 21 | if (atomic_dec_and_test(&namespace->count)) |
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| 22 | __put_namespace(namespace); |
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| 23 | } |
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| 24 | |||
| 25 | static inline void exit_namespace(struct task_struct *p) |
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| 26 | { |
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| 27 | struct namespace *namespace = p->namespace; |
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| 28 | if (namespace) { |
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| 29 | task_lock(p); |
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| 30 | p->namespace = NULL; |
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| 31 | task_unlock(p); |
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| 32 | put_namespace(namespace); |
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| 33 | } |
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| 34 | } |
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| 35 | |||
| 36 | static inline void get_namespace(struct namespace *namespace) |
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| 37 | { |
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| 38 | atomic_inc(&namespace->count); |
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| 39 | } |
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| 40 | |||
| 41 | #endif |
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| 42 | #endif |