1 #ifndef _LINUX_UTSNAME_H 2 #define _LINUX_UTSNAME_H 3 4 #include <linux/sched.h> 5 #include <linux/kref.h> 6 #include <linux/nsproxy.h> 7 #include <asm/atomic.h> 8 9 #define __OLD_UTS_LEN 8 10 11 struct oldold_utsname { 12 char sysname[9]; 13 char nodename[9]; 14 char release[9]; 15 char version[9]; 16 char machine[9]; 17 }; 18 19 #define __NEW_UTS_LEN 64 20 21 struct old_utsname { 22 char sysname[65]; 23 char nodename[65]; 24 char release[65]; 25 char version[65]; 26 char machine[65]; 27 }; 28 29 struct new_utsname { 30 char sysname[65]; 31 char nodename[65]; 32 char release[65]; 33 char version[65]; 34 char machine[65]; 35 char domainname[65]; 36 }; 37 38 struct uts_namespace { 39 struct kref kref; 40 struct new_utsname name; 41 }; 42 extern struct uts_namespace init_uts_ns; 43 44 static inline void get_uts_ns(struct uts_namespace *ns) 45 { 46 kref_get(&ns->kref); 47 } 48 49 #ifdef CONFIG_UTS_NS 50 extern int copy_utsname(int flags, struct task_struct *tsk); 51 extern void free_uts_ns(struct kref *kref); 52 53 static inline void put_uts_ns(struct uts_namespace *ns) 54 { 55 kref_put(&ns->kref, free_uts_ns); 56 } 57 #else 58 static inline int copy_utsname(int flags, struct task_struct *tsk) 59 { 60 return 0; 61 } 62 static inline void put_uts_ns(struct uts_namespace *ns) 63 { 64 } 65 #endif 66 67 static inline struct new_utsname *utsname(void) 68 { 69 return ¤t->nsproxy->uts_ns->name; 70 } 71 72 static inline struct new_utsname *init_utsname(void) 73 { 74 return &init_uts_ns.name; 75 } 76 77 extern struct rw_semaphore uts_sem; 78 #endif 79