1 #ifndef _LINUX_UTSNAME_H 2 #define _LINUX_UTSNAME_H 3 4 #define __OLD_UTS_LEN 8 5 6 struct oldold_utsname { 7 char sysname[9]; 8 char nodename[9]; 9 char release[9]; 10 char version[9]; 11 char machine[9]; 12 }; 13 14 #define __NEW_UTS_LEN 64 15 16 struct old_utsname { 17 char sysname[65]; 18 char nodename[65]; 19 char release[65]; 20 char version[65]; 21 char machine[65]; 22 }; 23 24 struct new_utsname { 25 char sysname[65]; 26 char nodename[65]; 27 char release[65]; 28 char version[65]; 29 char machine[65]; 30 char domainname[65]; 31 }; 32 33 #ifdef __KERNEL__ 34 35 #include <linux/sched.h> 36 #include <linux/kref.h> 37 #include <linux/nsproxy.h> 38 #include <asm/atomic.h> 39 40 struct uts_namespace { 41 struct kref kref; 42 struct new_utsname name; 43 }; 44 extern struct uts_namespace init_uts_ns; 45 46 static inline void get_uts_ns(struct uts_namespace *ns) 47 { 48 kref_get(&ns->kref); 49 } 50 51 extern struct uts_namespace *copy_utsname(unsigned long flags, 52 struct uts_namespace *ns); 53 extern void free_uts_ns(struct kref *kref); 54 55 static inline void put_uts_ns(struct uts_namespace *ns) 56 { 57 kref_put(&ns->kref, free_uts_ns); 58 } 59 static inline struct new_utsname *utsname(void) 60 { 61 return ¤t->nsproxy->uts_ns->name; 62 } 63 64 static inline struct new_utsname *init_utsname(void) 65 { 66 return &init_uts_ns.name; 67 } 68 69 extern struct rw_semaphore uts_sem; 70 71 #endif /* __KERNEL__ */ 72 73 #endif /* _LINUX_UTSNAME_H */ 74