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 unsigned int nr_hashed
;
25 struct task_struct
*child_reaper
;
26 struct kmem_cache
*pid_cachep
;
28 struct pid_namespace
*parent
;
30 struct vfsmount
*proc_mnt
;
32 #ifdef CONFIG_BSD_PROCESS_ACCT
33 struct bsd_acct_struct
*bacct
;
35 struct user_namespace
*user_ns
;
36 struct work_struct proc_work
;
39 int reboot
; /* group exit code if this pidns was rebooted */
40 unsigned int proc_inum
;
43 extern struct pid_namespace init_pid_ns
;
45 #define PIDNS_HASH_ADDING (1U << 31)
48 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
50 if (ns
!= &init_pid_ns
)
55 extern struct pid_namespace
*copy_pid_ns(unsigned long flags
,
56 struct user_namespace
*user_ns
, struct pid_namespace
*ns
);
57 extern void zap_pid_ns_processes(struct pid_namespace
*pid_ns
);
58 extern int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
);
59 extern void put_pid_ns(struct pid_namespace
*ns
);
61 #else /* !CONFIG_PID_NS */
62 #include <linux/err.h>
64 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
69 static inline struct pid_namespace
*copy_pid_ns(unsigned long flags
,
70 struct user_namespace
*user_ns
, struct pid_namespace
*ns
)
72 if (flags
& CLONE_NEWPID
)
73 ns
= ERR_PTR(-EINVAL
);
77 static inline void put_pid_ns(struct pid_namespace
*ns
)
81 static inline void zap_pid_ns_processes(struct pid_namespace
*ns
)
86 static inline int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
)
90 #endif /* CONFIG_PID_NS */
92 extern struct pid_namespace
*task_active_pid_ns(struct task_struct
*tsk
);
93 void pidhash_init(void);
94 void pidmap_init(void);
96 #endif /* _LINUX_PID_NS_H */