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- #ifndef _NAMESPACE_H_
- #define _NAMESPACE_H_
- #ifdef __KERNEL__
- #include <linux/mount.h>
- #include <linux/sched.h>
- #include <linux/nsproxy.h>
- struct mnt_namespace {
- atomic_t count;
- struct vfsmount * root;
- struct list_head list;
- wait_queue_head_t poll;
- int event;
- };
- extern int copy_mnt_ns(int, struct task_struct *);
- extern void __put_mnt_ns(struct mnt_namespace *ns);
- extern struct mnt_namespace *dup_mnt_ns(struct task_struct *,
- struct fs_struct *);
- static inline void put_mnt_ns(struct mnt_namespace *ns)
- {
- if (atomic_dec_and_lock(&ns->count, &vfsmount_lock))
- /* releases vfsmount_lock */
- __put_mnt_ns(ns);
- }
- static inline void exit_mnt_ns(struct task_struct *p)
- {
- struct mnt_namespace *ns = p->nsproxy->mnt_ns;
- if (ns)
- put_mnt_ns(ns);
- }
- static inline void get_mnt_ns(struct mnt_namespace *ns)
- {
- atomic_inc(&ns->count);
- }
- #endif
- #endif
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