/*-
 * 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_ */