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 */