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 BITS_PER_PAGE (PAGE_SIZE * 8)
17 #define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
18 #define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE)
20 struct bsd_acct_struct
;
22 struct pid_namespace
{
24 struct pidmap pidmap
[PIDMAP_ENTRIES
];
26 unsigned int nr_hashed
;
27 struct task_struct
*child_reaper
;
28 struct kmem_cache
*pid_cachep
;
30 struct pid_namespace
*parent
;
32 struct vfsmount
*proc_mnt
;
33 struct dentry
*proc_self
;
35 #ifdef CONFIG_BSD_PROCESS_ACCT
36 struct bsd_acct_struct
*bacct
;
38 struct user_namespace
*user_ns
;
39 struct work_struct proc_work
;
42 int reboot
; /* group exit code if this pidns was rebooted */
43 unsigned int proc_inum
;
46 extern struct pid_namespace init_pid_ns
;
48 #define PIDNS_HASH_ADDING (1U << 31)
51 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
53 if (ns
!= &init_pid_ns
)
58 extern struct pid_namespace
*copy_pid_ns(unsigned long flags
,
59 struct user_namespace
*user_ns
, struct pid_namespace
*ns
);
60 extern void zap_pid_ns_processes(struct pid_namespace
*pid_ns
);
61 extern int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
);
62 extern void put_pid_ns(struct pid_namespace
*ns
);
64 #else /* !CONFIG_PID_NS */
65 #include <linux/err.h>
67 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
72 static inline struct pid_namespace
*copy_pid_ns(unsigned long flags
,
73 struct user_namespace
*user_ns
, struct pid_namespace
*ns
)
75 if (flags
& CLONE_NEWPID
)
76 ns
= ERR_PTR(-EINVAL
);
80 static inline void put_pid_ns(struct pid_namespace
*ns
)
84 static inline void zap_pid_ns_processes(struct pid_namespace
*ns
)
89 static inline int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
)
93 #endif /* CONFIG_PID_NS */
95 extern struct pid_namespace
*task_active_pid_ns(struct task_struct
*tsk
);
96 void pidhash_init(void);
97 void pidmap_init(void);
99 #endif /* _LINUX_PID_NS_H */