1 #ifndef _LINUX_UTSNAME_H
2 #define _LINUX_UTSNAME_H
4 #define __OLD_UTS_LEN 8
6 struct oldold_utsname {
14 #define __NEW_UTS_LEN 64
25 char sysname[__NEW_UTS_LEN + 1];
26 char nodename[__NEW_UTS_LEN + 1];
27 char release[__NEW_UTS_LEN + 1];
28 char version[__NEW_UTS_LEN + 1];
29 char machine[__NEW_UTS_LEN + 1];
30 char domainname[__NEW_UTS_LEN + 1];
35 #include <linux/sched.h>
36 #include <linux/kref.h>
37 #include <linux/nsproxy.h>
38 #include <linux/err.h>
48 struct user_namespace;
49 extern struct user_namespace init_user_ns;
51 struct uts_namespace {
53 struct new_utsname name;
54 struct user_namespace *user_ns;
56 extern struct uts_namespace init_uts_ns;
59 static inline void get_uts_ns(struct uts_namespace *ns)
64 extern struct uts_namespace *copy_utsname(unsigned long flags,
65 struct task_struct *tsk);
66 extern void free_uts_ns(struct kref *kref);
68 static inline void put_uts_ns(struct uts_namespace *ns)
70 kref_put(&ns->kref, free_uts_ns);
73 static inline void get_uts_ns(struct uts_namespace *ns)
77 static inline void put_uts_ns(struct uts_namespace *ns)
81 static inline struct uts_namespace *copy_utsname(unsigned long flags,
82 struct task_struct *tsk)
84 if (flags & CLONE_NEWUTS)
85 return ERR_PTR(-EINVAL);
87 return tsk->nsproxy->uts_ns;
91 #ifdef CONFIG_PROC_SYSCTL
92 extern void uts_proc_notify(enum uts_proc proc);
94 static inline void uts_proc_notify(enum uts_proc proc)
99 static inline struct new_utsname *utsname(void)
101 return ¤t->nsproxy->uts_ns->name;
104 static inline struct new_utsname *init_utsname(void)
106 return &init_uts_ns.name;
109 extern struct rw_semaphore uts_sem;
111 #endif /* __KERNEL__ */
113 #endif /* _LINUX_UTSNAME_H */