[deliverable/linux.git] / include / linux / utsname.h

#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[65];
	char nodename[65];
	char release[65];
	char version[65];
	char machine[65];
	char domainname[65];
};

#ifdef __KERNEL__

#include <linux/sched.h>
#include <linux/kref.h>
#include <linux/nsproxy.h>
#include <asm/atomic.h>

struct uts_namespace {
	struct kref kref;
	struct new_utsname name;
};
extern struct uts_namespace init_uts_ns;

static inline void get_uts_ns(struct uts_namespace *ns)
{
	kref_get(&ns->kref);
}

#ifdef CONFIG_UTS_NS
extern struct uts_namespace *copy_utsname(int 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 struct uts_namespace *copy_utsname(int flags,
						struct uts_namespace *ns)
{
	return ns;
}

static inline void put_uts_ns(struct uts_namespace *ns)
{
}
#endif

static inline struct new_utsname *utsname(void)
{
	return &current->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 */
Commit	Line	Data
1da177e4 LT	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
b119f13f CLG	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
4865ecf1 SH	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	#ifdef CONFIG_UTS_NS
e3222c4e	52	extern struct uts_namespace copy_utsname(int flags, struct uts_namespace ns);
4865ecf1 SH	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	#else
e3222c4e BP	60	static inline struct uts_namespace *copy_utsname(int flags,
e3222c4e BP	61	struct uts_namespace *ns)
071df104	62	{
e3222c4e	63	return ns;
071df104 SH	64	}
071df104 SH	65
4865ecf1 SH	66	static inline void put_uts_ns(struct uts_namespace *ns)
	67	{
	68	}
	69	#endif
1da177e4	70
0bdd7aab SH	71	static inline struct new_utsname *utsname(void)
0bdd7aab SH	72	{
4865ecf1	73	return &current->nsproxy->uts_ns->name;
0bdd7aab SH	74	}
	75
	76	static inline struct new_utsname *init_utsname(void)
	77	{
4865ecf1	78	return &init_uts_ns.name;
0bdd7aab SH	79	}
0bdd7aab SH	80
1da177e4	81	extern struct rw_semaphore uts_sem;
b119f13f CLG	82
	83	#endif /* __KERNEL__ */
	84
	85	#endif /* _LINUX_UTSNAME_H */