1 #ifndef _LINUX_PID_NS_H
2 #define _LINUX_PID_NS_H
4 #include <linux/sched.h>
6 #include <linux/threads.h>
7 #include <linux/nsproxy.h>
8 #include <linux/kref.h>
15 #define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
17 struct pid_namespace {
19 struct pidmap pidmap[PIDMAP_ENTRIES];
21 struct task_struct *child_reaper;
22 struct kmem_cache *pid_cachep;
24 struct pid_namespace *parent;
26 struct vfsmount *proc_mnt;
30 extern struct pid_namespace init_pid_ns;
32 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
34 if (ns != &init_pid_ns)
39 extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns);
40 extern void free_pid_ns(struct kref *kref);
42 static inline void put_pid_ns(struct pid_namespace *ns)
44 if (ns != &init_pid_ns)
45 kref_put(&ns->kref, free_pid_ns);
48 static inline struct pid_namespace *task_active_pid_ns(struct task_struct *tsk)
50 return tsk->nsproxy->pid_ns;
53 static inline struct task_struct *task_child_reaper(struct task_struct *tsk)
55 BUG_ON(tsk != current);
56 return tsk->nsproxy->pid_ns->child_reaper;
59 #endif /* _LINUX_PID_NS_H */