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 */