[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 <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 &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>
58bfdd6d	38	#include <linux/err.h>
b119f13f CLG	39	#include <asm/atomic.h>
b119f13f CLG	40
4865ecf1 SH	41	struct uts_namespace {
	42	struct kref kref;
	43	struct new_utsname name;
	44	};
	45	extern struct uts_namespace init_uts_ns;
	46
58bfdd6d	47	#ifdef CONFIG_UTS_NS
4865ecf1 SH	48	static inline void get_uts_ns(struct uts_namespace *ns)
	49	{
	50	kref_get(&ns->kref);
	51	}
	52
213dd266 EB	53	extern struct uts_namespace *copy_utsname(unsigned long flags,
213dd266 EB	54	struct uts_namespace *ns);
4865ecf1 SH	55	extern void free_uts_ns(struct kref *kref);
	56
	57	static inline void put_uts_ns(struct uts_namespace *ns)
	58	{
	59	kref_put(&ns->kref, free_uts_ns);
	60	}
58bfdd6d PE	61	#else
	62	static inline void get_uts_ns(struct uts_namespace *ns)
	63	{
	64	}
	65
	66	static inline void put_uts_ns(struct uts_namespace *ns)
	67	{
	68	}
	69
	70	static inline struct uts_namespace *copy_utsname(unsigned long flags,
	71	struct uts_namespace *ns)
	72	{
	73	if (flags & CLONE_NEWUTS)
	74	return ERR_PTR(-EINVAL);
	75
	76	return ns;
	77	}
	78	#endif
	79
0bdd7aab SH	80	static inline struct new_utsname *utsname(void)
0bdd7aab SH	81	{
4865ecf1	82	return &current->nsproxy->uts_ns->name;
0bdd7aab SH	83	}
	84
	85	static inline struct new_utsname *init_utsname(void)
	86	{
4865ecf1	87	return &init_uts_ns.name;
0bdd7aab SH	88	}
0bdd7aab SH	89
1da177e4	90	extern struct rw_semaphore uts_sem;
b119f13f CLG	91
	92	#endif /* __KERNEL__ */
	93
	94	#endif /* _LINUX_UTSNAME_H */