1 #ifndef _LINUX_UTSNAME_H
2 #define _LINUX_UTSNAME_H
5 #include <linux/sched.h>
6 #include <linux/kref.h>
7 #include <linux/nsproxy.h>
9 #include <uapi/linux/utsname.h>
19 struct user_namespace;
20 extern struct user_namespace init_user_ns;
22 struct uts_namespace {
24 struct new_utsname name;
25 struct user_namespace *user_ns;
27 extern struct uts_namespace init_uts_ns;
30 static inline void get_uts_ns(struct uts_namespace *ns)
35 extern struct uts_namespace *copy_utsname(unsigned long flags,
36 struct task_struct *tsk);
37 extern void free_uts_ns(struct kref *kref);
39 static inline void put_uts_ns(struct uts_namespace *ns)
41 kref_put(&ns->kref, free_uts_ns);
44 static inline void get_uts_ns(struct uts_namespace *ns)
48 static inline void put_uts_ns(struct uts_namespace *ns)
52 static inline struct uts_namespace *copy_utsname(unsigned long flags,
53 struct task_struct *tsk)
55 if (flags & CLONE_NEWUTS)
56 return ERR_PTR(-EINVAL);
58 return tsk->nsproxy->uts_ns;
62 #ifdef CONFIG_PROC_SYSCTL
63 extern void uts_proc_notify(enum uts_proc proc);
65 static inline void uts_proc_notify(enum uts_proc proc)
70 static inline struct new_utsname *utsname(void)
72 return ¤t->nsproxy->uts_ns->name;
75 static inline struct new_utsname *init_utsname(void)
77 return &init_uts_ns.name;
80 extern struct rw_semaphore uts_sem;
82 #endif /* _LINUX_UTSNAME_H */