1 #ifndef _LINUX_PID_NS_H
2 #define _LINUX_PID_NS_H
4 #include <linux/sched.h>
7 #include <linux/threads.h>
8 #include <linux/nsproxy.h>
9 #include <linux/kref.h>
16 #define PIDMAP_ENTRIES ((PID_MAX_LIMIT + 8*PAGE_SIZE - 1)/PAGE_SIZE/8)
18 struct bsd_acct_struct
;
20 struct pid_namespace
{
22 struct pidmap pidmap
[PIDMAP_ENTRIES
];
24 struct task_struct
*child_reaper
;
25 struct kmem_cache
*pid_cachep
;
27 struct pid_namespace
*parent
;
29 struct vfsmount
*proc_mnt
;
31 #ifdef CONFIG_BSD_PROCESS_ACCT
32 struct bsd_acct_struct
*bacct
;
36 int reboot
; /* group exit code if this pidns was rebooted */
39 extern struct pid_namespace init_pid_ns
;
42 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
44 if (ns
!= &init_pid_ns
)
49 extern struct pid_namespace
*copy_pid_ns(unsigned long flags
, struct pid_namespace
*ns
);
50 extern void free_pid_ns(struct kref
*kref
);
51 extern void zap_pid_ns_processes(struct pid_namespace
*pid_ns
);
52 extern int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
);
54 static inline void put_pid_ns(struct pid_namespace
*ns
)
56 if (ns
!= &init_pid_ns
)
57 kref_put(&ns
->kref
, free_pid_ns
);
60 #else /* !CONFIG_PID_NS */
61 #include <linux/err.h>
63 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
68 static inline struct pid_namespace
*
69 copy_pid_ns(unsigned long flags
, struct pid_namespace
*ns
)
71 if (flags
& CLONE_NEWPID
)
72 ns
= ERR_PTR(-EINVAL
);
76 static inline void put_pid_ns(struct pid_namespace
*ns
)
80 static inline void zap_pid_ns_processes(struct pid_namespace
*ns
)
85 static inline int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
)
89 #endif /* CONFIG_PID_NS */
91 extern struct pid_namespace
*task_active_pid_ns(struct task_struct
*tsk
);
92 void pidhash_init(void);
93 void pidmap_init(void);
95 #endif /* _LINUX_PID_NS_H */