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42 lines
855 B
42 lines
855 B
#ifndef _NAMESPACE_H_
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#define _NAMESPACE_H_
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#ifdef __KERNEL__
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#include <linux/mount.h>
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#include <linux/sched.h>
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struct namespace {
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atomic_t count;
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struct vfsmount * root;
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struct list_head list;
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struct rw_semaphore sem;
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};
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extern void umount_tree(struct vfsmount *);
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extern int copy_namespace(int, struct task_struct *);
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extern void __put_namespace(struct namespace *namespace);
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static inline void put_namespace(struct namespace *namespace)
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{
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if (atomic_dec_and_test(&namespace->count))
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__put_namespace(namespace);
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}
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static inline void exit_namespace(struct task_struct *p)
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{
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struct namespace *namespace = p->namespace;
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if (namespace) {
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task_lock(p);
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p->namespace = NULL;
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task_unlock(p);
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put_namespace(namespace);
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}
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}
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static inline void get_namespace(struct namespace *namespace)
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{
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atomic_inc(&namespace->count);
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}
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#endif
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#endif
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