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 unsigned int nr_hashed;
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;
45 #define PIDNS_HASH_ADDING (1U << 31)
48 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
50 if (ns != &init_pid_ns)
55 extern struct pid_namespace *copy_pid_ns(unsigned long flags,
56 struct user_namespace *user_ns, struct pid_namespace *ns);
57 extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
58 extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
59 extern void put_pid_ns(struct pid_namespace *ns);
61 #else /* !CONFIG_PID_NS */
62 #include <linux/err.h>
64 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
69 static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
70 struct user_namespace *user_ns, struct pid_namespace *ns)
72 if (flags & CLONE_NEWPID)
73 ns = ERR_PTR(-EINVAL);
77 static inline void put_pid_ns(struct pid_namespace *ns)
81 static inline void zap_pid_ns_processes(struct pid_namespace *ns)
86 static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
90 #endif /* CONFIG_PID_NS */
92 extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
93 void pidhash_init(void);
94 void pidmap_init(void);
96 #endif /* _LINUX_PID_NS_H */