#ifndef _LINUX_UTSNAME_H #define _LINUX_UTSNAME_H #define __OLD_UTS_LEN 8 struct oldold_utsname { char sysname[9]; char nodename[9]; char release[9]; char version[9]; char machine[9]; }; #define __NEW_UTS_LEN 64 struct old_utsname { char sysname[65]; char nodename[65]; char release[65]; char version[65]; char machine[65]; }; struct new_utsname { char sysname[__NEW_UTS_LEN + 1]; char nodename[__NEW_UTS_LEN + 1]; char release[__NEW_UTS_LEN + 1]; char version[__NEW_UTS_LEN + 1]; char machine[__NEW_UTS_LEN + 1]; char domainname[__NEW_UTS_LEN + 1]; }; #ifdef __KERNEL__ #include <linux/sched.h> #include <linux/kref.h> #include <linux/nsproxy.h> #include <linux/err.h> #include <asm/atomic.h> struct uts_namespace { struct kref kref; struct new_utsname name; }; extern struct uts_namespace init_uts_ns; #ifdef CONFIG_UTS_NS static inline void get_uts_ns(struct uts_namespace *ns) { kref_get(&ns->kref); } extern struct uts_namespace *copy_utsname(unsigned long flags, struct uts_namespace *ns); extern void free_uts_ns(struct kref *kref); static inline void put_uts_ns(struct uts_namespace *ns) { kref_put(&ns->kref, free_uts_ns); } #else static inline void get_uts_ns(struct uts_namespace *ns) { } static inline void put_uts_ns(struct uts_namespace *ns) { } static inline struct uts_namespace *copy_utsname(unsigned long flags, struct uts_namespace *ns) { if (flags & CLONE_NEWUTS) return ERR_PTR(-EINVAL); return ns; } #endif static inline struct new_utsname *utsname(void) { return ¤t->nsproxy->uts_ns->name; } static inline struct new_utsname *init_utsname(void) { return &init_uts_ns.name; } extern struct rw_semaphore uts_sem; #endif /* __KERNEL__ */ #endif /* _LINUX_UTSNAME_H */