[GitHub/mt8127/android_kernel_alcatel_ttab.git] / include / linux / utsname.h

#ifndef _LINUX_UTSNAME_H
#define _LINUX_UTSNAME_H


#include <linux/sched.h>
#include <linux/kref.h>
#include <linux/nsproxy.h>
#include <linux/err.h>
#include <uapi/linux/utsname.h>

enum uts_proc {
	UTS_PROC_OSTYPE,
	UTS_PROC_OSRELEASE,
	UTS_PROC_VERSION,
	UTS_PROC_HOSTNAME,
	UTS_PROC_DOMAINNAME,
};

struct user_namespace;
extern struct user_namespace init_user_ns;

struct uts_namespace {
	struct kref kref;
	struct new_utsname name;
	struct user_namespace *user_ns;
};
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 task_struct *tsk);
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 task_struct *tsk)
{
	if (flags & CLONE_NEWUTS)
		return ERR_PTR(-EINVAL);

	return tsk->nsproxy->uts_ns;
}
#endif

#ifdef CONFIG_PROC_SYSCTL
extern void uts_proc_notify(enum uts_proc proc);
#else
static inline void uts_proc_notify(enum uts_proc proc)
{
}
#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 /* _LINUX_UTSNAME_H */
Commit	Line	Data
	1	#ifndef _LINUX_UTSNAME_H
	2	#define _LINUX_UTSNAME_H
	3
	4
	5	#include <linux/sched.h>
	6	#include <linux/kref.h>
	7	#include <linux/nsproxy.h>
	8	#include <linux/err.h>
	9	#include <uapi/linux/utsname.h>
	10
	11	enum uts_proc {
	12	UTS_PROC_OSTYPE,
	13	UTS_PROC_OSRELEASE,
	14	UTS_PROC_VERSION,
	15	UTS_PROC_HOSTNAME,
	16	UTS_PROC_DOMAINNAME,
	17	};
	18
	19	struct user_namespace;
	20	extern struct user_namespace init_user_ns;
	21
	22	struct uts_namespace {
	23	struct kref kref;
	24	struct new_utsname name;
	25	struct user_namespace *user_ns;
	26	};
	27	extern struct uts_namespace init_uts_ns;
	28
	29	#ifdef CONFIG_UTS_NS
	30	static inline void get_uts_ns(struct uts_namespace *ns)
	31	{
	32	kref_get(&ns->kref);
	33	}
	34
	35	extern struct uts_namespace *copy_utsname(unsigned long flags,
	36	struct task_struct *tsk);
	37	extern void free_uts_ns(struct kref *kref);
	38
	39	static inline void put_uts_ns(struct uts_namespace *ns)
	40	{
	41	kref_put(&ns->kref, free_uts_ns);
	42	}
	43	#else
	44	static inline void get_uts_ns(struct uts_namespace *ns)
	45	{
	46	}
	47
	48	static inline void put_uts_ns(struct uts_namespace *ns)
	49	{
	50	}
	51
	52	static inline struct uts_namespace *copy_utsname(unsigned long flags,
	53	struct task_struct *tsk)
	54	{
	55	if (flags & CLONE_NEWUTS)
	56	return ERR_PTR(-EINVAL);
	57
	58	return tsk->nsproxy->uts_ns;
	59	}
	60	#endif
	61
	62	#ifdef CONFIG_PROC_SYSCTL
	63	extern void uts_proc_notify(enum uts_proc proc);
	64	#else
	65	static inline void uts_proc_notify(enum uts_proc proc)
	66	{
	67	}
	68	#endif
	69
	70	static inline struct new_utsname *utsname(void)
	71	{
	72	return &current->nsproxy->uts_ns->name;
	73	}
	74
	75	static inline struct new_utsname *init_utsname(void)
	76	{
	77	return &init_uts_ns.name;
	78	}
	79
	80	extern struct rw_semaphore uts_sem;
	81
	82	#endif /* _LINUX_UTSNAME_H */