1 #ifndef _LINUX_PID_NS_H
2 #define _LINUX_PID_NS_H
4 #include <linux/sched.h>
7 #include <linux/workqueue.h>
8 #include <linux/threads.h>
9 #include <linux/nsproxy.h>
10 #include <linux/kref.h>
11 #include <linux/ns_common.h>
18 #define BITS_PER_PAGE (PAGE_SIZE * 8)
19 #define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
20 #define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE)
24 enum { /* definitions for pid_namespace's hide_pid field */
26 HIDEPID_NO_ACCESS
= 1,
27 HIDEPID_INVISIBLE
= 2,
30 struct pid_namespace
{
32 struct pidmap pidmap
[PIDMAP_ENTRIES
];
35 unsigned int nr_hashed
;
36 struct task_struct
*child_reaper
;
37 struct kmem_cache
*pid_cachep
;
39 struct pid_namespace
*parent
;
41 struct vfsmount
*proc_mnt
;
42 struct dentry
*proc_self
;
43 struct dentry
*proc_thread_self
;
45 #ifdef CONFIG_BSD_PROCESS_ACCT
48 struct user_namespace
*user_ns
;
49 struct ucounts
*ucounts
;
50 struct work_struct proc_work
;
53 int reboot
; /* group exit code if this pidns was rebooted */
57 extern struct pid_namespace init_pid_ns
;
59 #define PIDNS_HASH_ADDING (1U << 31)
62 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
64 if (ns
!= &init_pid_ns
)
69 extern struct pid_namespace
*copy_pid_ns(unsigned long flags
,
70 struct user_namespace
*user_ns
, struct pid_namespace
*ns
);
71 extern void zap_pid_ns_processes(struct pid_namespace
*pid_ns
);
72 extern int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
);
73 extern void put_pid_ns(struct pid_namespace
*ns
);
75 #else /* !CONFIG_PID_NS */
76 #include <linux/err.h>
78 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
83 static inline struct pid_namespace
*copy_pid_ns(unsigned long flags
,
84 struct user_namespace
*user_ns
, struct pid_namespace
*ns
)
86 if (flags
& CLONE_NEWPID
)
87 ns
= ERR_PTR(-EINVAL
);
91 static inline void put_pid_ns(struct pid_namespace
*ns
)
95 static inline void zap_pid_ns_processes(struct pid_namespace
*ns
)
100 static inline int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
)
104 #endif /* CONFIG_PID_NS */
106 extern struct pid_namespace
*task_active_pid_ns(struct task_struct
*tsk
);
107 void pidhash_init(void);
108 void pidmap_init(void);
110 #endif /* _LINUX_PID_NS_H */