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>
8 #include <linux/ns_common.h>
10 #include <uapi/linux/utsname.h>
20 struct user_namespace;
21 extern struct user_namespace init_user_ns;
23 struct uts_namespace {
25 struct new_utsname name;
26 struct user_namespace *user_ns;
29 extern struct uts_namespace init_uts_ns;
32 static inline void get_uts_ns(struct uts_namespace *ns)
37 extern struct uts_namespace *copy_utsname(unsigned long flags,
38 struct user_namespace *user_ns, struct uts_namespace *old_ns);
39 extern void free_uts_ns(struct kref *kref);
41 static inline void put_uts_ns(struct uts_namespace *ns)
43 kref_put(&ns->kref, free_uts_ns);
46 static inline void get_uts_ns(struct uts_namespace *ns)
50 static inline void put_uts_ns(struct uts_namespace *ns)
54 static inline struct uts_namespace *copy_utsname(unsigned long flags,
55 struct user_namespace *user_ns, struct uts_namespace *old_ns)
57 if (flags & CLONE_NEWUTS)
58 return ERR_PTR(-EINVAL);
64 #ifdef CONFIG_PROC_SYSCTL
65 extern void uts_proc_notify(enum uts_proc proc);
67 static inline void uts_proc_notify(enum uts_proc proc)
72 static inline struct new_utsname *utsname(void)
74 return ¤t->nsproxy->uts_ns->name;
77 static inline struct new_utsname *init_utsname(void)
79 return &init_uts_ns.name;
82 extern struct rw_semaphore uts_sem;
84 #endif /* _LINUX_UTSNAME_H */