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- #ifndef _LINUX_PID_NS_H
- #define _LINUX_PID_NS_H
- #include <linux/sched.h>
- #include <linux/mm.h>
- #include <linux/threads.h>
- #include <linux/pid.h>
- #include <linux/nsproxy.h>
- #include <linux/kref.h>
- struct pidmap {
- atomic_t nr_free;
- void *page;
- };
- #define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
- struct pid_namespace {
- struct kref kref;
- struct pidmap pidmap[PIDMAP_ENTRIES];
- int last_pid;
- struct task_struct *child_reaper;
- };
- extern struct pid_namespace init_pid_ns;
- static inline void get_pid_ns(struct pid_namespace *ns)
- {
- kref_get(&ns->kref);
- }
- extern int copy_pid_ns(int flags, struct task_struct *tsk);
- extern void free_pid_ns(struct kref *kref);
- static inline void put_pid_ns(struct pid_namespace *ns)
- {
- kref_put(&ns->kref, free_pid_ns);
- }
- static inline struct task_struct *child_reaper(struct task_struct *tsk)
- {
- return init_pid_ns.child_reaper;
- }
- #endif /* _LINUX_PID_NS_H */
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