[mirror_ubuntu-jammy-kernel.git] / include / linux / time_namespace.h

/* 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 */
Commit	Line	Data
769071ac AV	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _LINUX_TIMENS_H
	3	#define _LINUX_TIMENS_H
	4
	5
	6	#include <linux/sched.h>
	7	#include <linux/kref.h>
	8	#include <linux/nsproxy.h>
	9	#include <linux/ns_common.h>
	10	#include <linux/err.h>
	11
	12	struct user_namespace;
	13	extern struct user_namespace init_user_ns;
	14
	15	struct time_namespace {
	16	struct kref kref;
	17	struct user_namespace *user_ns;
	18	struct ucounts *ucounts;
	19	struct ns_common ns;
	20	} __randomize_layout;
	21
	22	extern struct time_namespace init_time_ns;
	23
	24	#ifdef CONFIG_TIME_NS
	25	static inline struct time_namespace get_time_ns(struct time_namespace ns)
	26	{
	27	kref_get(&ns->kref);
	28	return ns;
	29	}
	30
	31	struct time_namespace *copy_time_ns(unsigned long flags,
	32	struct user_namespace *user_ns,
	33	struct time_namespace *old_ns);
	34	void free_time_ns(struct kref *kref);
	35	int timens_on_fork(struct nsproxy nsproxy, struct task_struct tsk);
	36
	37	static inline void put_time_ns(struct time_namespace *ns)
	38	{
	39	kref_put(&ns->kref, free_time_ns);
	40	}
	41
	42	#else
	43	static inline struct time_namespace get_time_ns(struct time_namespace ns)
	44	{
	45	return NULL;
	46	}
	47
	48	static inline void put_time_ns(struct time_namespace *ns)
	49	{
	50	}
	51
	52	static inline
	53	struct time_namespace *copy_time_ns(unsigned long flags,
	54	struct user_namespace *user_ns,
	55	struct time_namespace *old_ns)
	56	{
	57	if (flags & CLONE_NEWTIME)
	58	return ERR_PTR(-EINVAL);
	59
	60	return old_ns;
	61	}
	62
	63	static inline int timens_on_fork(struct nsproxy *nsproxy,
	64	struct task_struct *tsk)
65	{
66	return 0;
67	}
68
69	#endif
70
71	#endif /* _LINUX_TIMENS_H */