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];
28 unsigned int nr_hashed;
29 struct task_struct *child_reaper;
30 struct kmem_cache *pid_cachep;
32 struct pid_namespace *parent;
34 struct vfsmount *proc_mnt;
35 struct dentry *proc_self;
36 struct dentry *proc_thread_self;
38 #ifdef CONFIG_BSD_PROCESS_ACCT
39 struct bsd_acct_struct *bacct;
41 struct user_namespace *user_ns;
42 struct work_struct proc_work;
45 int reboot; /* group exit code if this pidns was rebooted */
46 unsigned int proc_inum;
49 extern struct pid_namespace init_pid_ns;
51 #define PIDNS_HASH_ADDING (1U << 31)
54 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
56 if (ns != &init_pid_ns)
61 extern struct pid_namespace *copy_pid_ns(unsigned long flags,
62 struct user_namespace *user_ns, struct pid_namespace *ns);
63 extern void zap_pid_ns_processes(struct pid_namespace *pid_ns);
64 extern int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd);
65 extern void put_pid_ns(struct pid_namespace *ns);
67 #else /* !CONFIG_PID_NS */
68 #include <linux/err.h>
70 static inline struct pid_namespace *get_pid_ns(struct pid_namespace *ns)
75 static inline struct pid_namespace *copy_pid_ns(unsigned long flags,
76 struct user_namespace *user_ns, struct pid_namespace *ns)
78 if (flags & CLONE_NEWPID)
79 ns = ERR_PTR(-EINVAL);
83 static inline void put_pid_ns(struct pid_namespace *ns)
87 static inline void zap_pid_ns_processes(struct pid_namespace *ns)
92 static inline int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
96 #endif /* CONFIG_PID_NS */
98 extern struct pid_namespace *task_active_pid_ns(struct task_struct *tsk);
99 void pidhash_init(void);
100 void pidmap_init(void);
102 #endif /* _LINUX_PID_NS_H */