42 lines
811 B
C
42 lines
811 B
C
#ifndef _NAMESPACE_H_
|
|
#define _NAMESPACE_H_
|
|
#ifdef __KERNEL__
|
|
|
|
#include <linux/mount.h>
|
|
#include <linux/sched.h>
|
|
|
|
struct namespace {
|
|
atomic_t count;
|
|
struct vfsmount * root;
|
|
struct list_head list;
|
|
struct rw_semaphore sem;
|
|
};
|
|
|
|
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
|