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];
24 struct task_struct *child_reaper;
25 struct kmem_cache *pid_cachep;
27 struct pid_namespace *parent;
29 struct vfsmount *proc_mnt;
31 #ifdef CONFIG_BSD_PROCESS_ACCT
32 struct bsd_acct_struct *bacct;
36 int reboot; /* group exit code if this pidns was rebooted */
39 extern struct pid_namespace init_pid_ns;
42 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
44 if (ns != &init_pid_ns)
49 extern struct pid_namespace *copy_pid_ns(unsigned long flags, struct pid_namespace *ns);
50 extern void free_pid_ns(struct kref *kref);
51 extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
52 extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
54 static inline void put_pid_ns(struct pid_namespace *ns)
56 if (ns != &init_pid_ns)
57 kref_put(&ns->kref, free_pid_ns);
60 #else /* !CONFIG_PID_NS */
61 #include <linux/err.h>
63 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
68 static inline struct pid_namespace *
69 copy_pid_ns(unsigned long flags, struct pid_namespace *ns)
71 if (flags & CLONE_NEWPID)
72 ns = ERR_PTR(-EINVAL);
76 static inline void put_pid_ns(struct pid_namespace *ns)
80 static inline void zap_pid_ns_processes(struct pid_namespace *ns)
85 static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
89 #endif /* CONFIG_PID_NS */
91 extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
92 void pidhash_init(void);
93 void pidmap_init(void);
95 #endif /* _LINUX_PID_NS_H */