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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_UTS_NAMESPACE_H
#define _LINUX_UTS_NAMESPACE_H
#include <linux/ns_common.h>
#include <uapi/linux/utsname.h>
struct user_namespace;
extern struct user_namespace init_user_ns;
struct uts_namespace {
struct new_utsname name;
struct user_namespace *user_ns;
struct ucounts *ucounts;
struct ns_common ns;
} __randomize_layout;
extern struct uts_namespace init_uts_ns;
#ifdef CONFIG_UTS_NS
static inline struct uts_namespace *to_uts_ns(struct ns_common *ns)
{
return container_of(ns, struct uts_namespace, ns);
}
static inline void get_uts_ns(struct uts_namespace *ns)
{
ns_ref_inc(ns);
}
extern struct uts_namespace *copy_utsname(u64 flags,
struct user_namespace *user_ns, struct uts_namespace *old_ns);
extern void free_uts_ns(struct uts_namespace *ns);
static inline void put_uts_ns(struct uts_namespace *ns)
{
if (ns_ref_put(ns))
free_uts_ns(ns);
}
void uts_ns_init(void);
#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(u64 flags,
struct user_namespace *user_ns, struct uts_namespace *old_ns)
{
if (flags & CLONE_NEWUTS)
return ERR_PTR(-EINVAL);
return old_ns;
}
static inline void uts_ns_init(void)
{
}
#endif
#endif /* _LINUX_UTS_NAMESPACE_H */