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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TIMENS_H
#define _LINUX_TIMENS_H
#include <linux/sched.h>
#include <linux/kref.h>
#include <linux/nsproxy.h>
#include <linux/ns_common.h>
#include <linux/err.h>
struct user_namespace;
extern struct user_namespace init_user_ns;
struct time_namespace {
struct kref kref;
struct user_namespace *user_ns;
struct ucounts *ucounts;
struct ns_common ns;
} __randomize_layout;
extern struct time_namespace init_time_ns;
#ifdef CONFIG_TIME_NS
static inline struct time_namespace *get_time_ns(struct time_namespace *ns)
{
kref_get(&ns->kref);
return ns;
}
struct time_namespace *copy_time_ns(unsigned long flags,
struct user_namespace *user_ns,
struct time_namespace *old_ns);
void free_time_ns(struct kref *kref);
int timens_on_fork(struct nsproxy *nsproxy, struct task_struct *tsk);
static inline void put_time_ns(struct time_namespace *ns)
{
kref_put(&ns->kref, free_time_ns);
}
#else
static inline struct time_namespace *get_time_ns(struct time_namespace *ns)
{
return NULL;
}
static inline void put_time_ns(struct time_namespace *ns)
{
}
static inline
struct time_namespace *copy_time_ns(unsigned long flags,
struct user_namespace *user_ns,
struct time_namespace *old_ns)
{
if (flags & CLONE_NEWTIME)
return ERR_PTR(-EINVAL);
return old_ns;
}
static inline int timens_on_fork(struct nsproxy *nsproxy,
struct task_struct *tsk)
{
return 0;
}
#endif
#endif /* _LINUX_TIMENS_H */
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