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#ifndef _NAMESPACE_H_
#define _NAMESPACE_H_
#ifdef __KERNEL__
struct namespace {
atomic_t count;
struct vfsmount * root;
struct list_head list;
struct rw_semaphore sem;
};
extern void umount_tree(struct vfsmount *);
static inline void put_namespace(struct namespace *namespace)
{
if (atomic_dec_and_test(&namespace->count)) {
down_write(&namespace->sem);
spin_lock(&dcache_lock);
umount_tree(namespace->root);
spin_unlock(&dcache_lock);
up_write(&namespace->sem);
kfree(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);
}
}
extern int copy_namespace(int, struct task_struct *);
static inline void get_namespace(struct namespace *namespace)
{
atomic_inc(&namespace->count);
}
#endif
#endif
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