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];
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;
46 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
48 if (ns != &init_pid_ns)
53 extern struct pid_namespace *copy_pid_ns(unsigned long flags,
54 struct user_namespace *user_ns, struct pid_namespace *ns);
55 extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
56 extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
57 extern void put_pid_ns(struct pid_namespace *ns);
59 #else /* !CONFIG_PID_NS */
60 #include <linux/err.h>
62 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
67 static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
68 struct user_namespace *user_ns, struct pid_namespace *ns)
70 if (flags & CLONE_NEWPID)
71 ns = ERR_PTR(-EINVAL);
75 static inline void put_pid_ns(struct pid_namespace *ns)
79 static inline void zap_pid_ns_processes(struct pid_namespace *ns)
84 static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
88 #endif /* CONFIG_PID_NS */
90 extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
91 void pidhash_init(void);
92 void pidmap_init(void);
94 #endif /* _LINUX_PID_NS_H */