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 struct pid_namespace
{
26 struct pidmap pidmap
[PIDMAP_ENTRIES
];
29 unsigned int nr_hashed
;
30 struct task_struct
*child_reaper
;
31 struct kmem_cache
*pid_cachep
;
33 struct pid_namespace
*parent
;
35 struct vfsmount
*proc_mnt
;
36 struct dentry
*proc_self
;
37 struct dentry
*proc_thread_self
;
39 #ifdef CONFIG_BSD_PROCESS_ACCT
42 struct user_namespace
*user_ns
;
43 struct ucounts
*ucounts
;
44 struct work_struct proc_work
;
47 int reboot
; /* group exit code if this pidns was rebooted */
51 extern struct pid_namespace init_pid_ns
;
53 #define PIDNS_HASH_ADDING (1U << 31)
56 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
58 if (ns
!= &init_pid_ns
)
63 extern struct pid_namespace
*copy_pid_ns(unsigned long flags
,
64 struct user_namespace
*user_ns
, struct pid_namespace
*ns
);
65 extern void zap_pid_ns_processes(struct pid_namespace
*pid_ns
);
66 extern int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
);
67 extern void put_pid_ns(struct pid_namespace
*ns
);
69 #else /* !CONFIG_PID_NS */
70 #include <linux/err.h>
72 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
77 static inline struct pid_namespace
*copy_pid_ns(unsigned long flags
,
78 struct user_namespace
*user_ns
, struct pid_namespace
*ns
)
80 if (flags
& CLONE_NEWPID
)
81 ns
= ERR_PTR(-EINVAL
);
85 static inline void put_pid_ns(struct pid_namespace
*ns
)
89 static inline void zap_pid_ns_processes(struct pid_namespace
*ns
)
94 static inline int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
)
98 #endif /* CONFIG_PID_NS */
100 extern struct pid_namespace
*task_active_pid_ns(struct task_struct
*tsk
);
101 void pidhash_init(void);
102 void pidmap_init(void);
104 #endif /* _LINUX_PID_NS_H */