/*-
 * Copyright (c) 2017 Mellanox Technologies, Ltd.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice unmodified, this list of conditions, and the following
 *    disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#ifndef	_LINUXKPI_LINUX_PID_H_
#define	_LINUXKPI_LINUX_PID_H_

#include <sys/param.h>
#include <sys/systm.h>
#include <sys/proc.h>

enum pid_type {
	PIDTYPE_PID,
	PIDTYPE_PGID,
	PIDTYPE_SID,
	PIDTYPE_MAX
};

#define	pid_nr(n) (n)
#define	pid_vnr(n) (n)
#define	from_kuid_munged(a, uid) (uid)

#define	pid_task(pid, type) ({			\
	struct task_struct *__ts;		\
	CTASSERT((type) == PIDTYPE_PID);	\
	__ts = linux_pid_task(pid);		\
	__ts;					\
})

#define	get_pid_task(pid, type) ({		\
	struct task_struct *__ts;		\
	CTASSERT((type) == PIDTYPE_PID);	\
	__ts = linux_get_pid_task(pid);		\
	__ts;					\
})

#define	get_task_pid(task, type) ({		\
	CTASSERT((type) == PIDTYPE_PID);	\
	(task)->task_thread->td_tid;		\
})

struct task_struct;
extern struct task_struct *linux_pid_task(pid_t);
extern struct task_struct *linux_get_pid_task(pid_t);

#endif					/* _LINUXKPI_LINUX_PID_H_ */