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>
17 #define BITS_PER_PAGE (PAGE_SIZE * 8)
18 #define BITS_PER_PAGE_MASK (BITS_PER_PAGE-1)
19 #define PIDMAP_ENTRIES ((PID_MAX_LIMIT+BITS_PER_PAGE-1)/BITS_PER_PAGE)
21 struct bsd_acct_struct
;
23 struct pid_namespace
{
25 struct pidmap pidmap
[PIDMAP_ENTRIES
];
27 unsigned int nr_hashed
;
28 struct task_struct
*child_reaper
;
29 struct kmem_cache
*pid_cachep
;
31 struct pid_namespace
*parent
;
33 struct vfsmount
*proc_mnt
;
34 struct dentry
*proc_self
;
36 #ifdef CONFIG_BSD_PROCESS_ACCT
37 struct bsd_acct_struct
*bacct
;
39 struct user_namespace
*user_ns
;
40 struct work_struct proc_work
;
43 int reboot
; /* group exit code if this pidns was rebooted */
44 unsigned int proc_inum
;
47 extern struct pid_namespace init_pid_ns
;
49 #define PIDNS_HASH_ADDING (1U << 31)
52 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
54 if (ns
!= &init_pid_ns
)
59 extern struct pid_namespace
*copy_pid_ns(unsigned long flags
,
60 struct user_namespace
*user_ns
, struct pid_namespace
*ns
);
61 extern void zap_pid_ns_processes(struct pid_namespace
*pid_ns
);
62 extern int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
);
63 extern void put_pid_ns(struct pid_namespace
*ns
);
65 #else /* !CONFIG_PID_NS */
66 #include <linux/err.h>
68 static inline struct pid_namespace
*get_pid_ns(struct pid_namespace
*ns
)
73 static inline struct pid_namespace
*copy_pid_ns(unsigned long flags
,
74 struct user_namespace
*user_ns
, struct pid_namespace
*ns
)
76 if (flags
& CLONE_NEWPID
)
77 ns
= ERR_PTR(-EINVAL
);
81 static inline void put_pid_ns(struct pid_namespace
*ns
)
85 static inline void zap_pid_ns_processes(struct pid_namespace
*ns
)
90 static inline int reboot_pid_ns(struct pid_namespace
*pid_ns
, int cmd
)
94 #endif /* CONFIG_PID_NS */
96 extern struct pid_namespace
*task_active_pid_ns(struct task_struct
*tsk
);
97 void pidhash_init(void);
98 void pidmap_init(void);
100 #endif /* _LINUX_PID_NS_H */