[linux-2.6-block.git] / include / linux / if_tun.h

/*
 *  Universal TUN/TAP device driver.
 *  Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 */
#ifndef __IF_TUN_H
#define __IF_TUN_H

#include <uapi/linux/if_tun.h>

#define TUN_XDP_FLAG 0x1UL

#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
struct socket *tun_get_socket(struct file *);
struct ptr_ring *tun_get_tx_ring(struct file *file);
bool tun_is_xdp_frame(void *ptr);
void *tun_xdp_to_ptr(void *ptr);
void *tun_ptr_to_xdp(void *ptr);
void tun_ptr_free(void *ptr);
#else
#include <linux/err.h>
#include <linux/errno.h>
struct file;
struct socket;
static inline struct socket *tun_get_socket(struct file *f)
{
	return ERR_PTR(-EINVAL);
}
static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
{
	return ERR_PTR(-EINVAL);
}
static inline bool tun_is_xdp_frame(void *ptr)
{
	return false;
}
static inline void *tun_xdp_to_ptr(void *ptr)
{
	return NULL;
}
static inline void *tun_ptr_to_xdp(void *ptr)
{
	return NULL;
}
static inline void tun_ptr_free(void *ptr)
{
}
#endif /* CONFIG_TUN */
#endif /* __IF_TUN_H */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Universal TUN/TAP device driver.
	3	* Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; either version 2 of the License, or
	8	* (at your option) any later version.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
1da177e4	14	*/
1da177e4 LT	15	#ifndef __IF_TUN_H
	16	#define __IF_TUN_H
	17
607ca46e	18	#include <uapi/linux/if_tun.h>
1da177e4	19
fc72d1d5 JW	20	#define TUN_XDP_FLAG 0x1UL
fc72d1d5 JW	21
05c2828c MT	22	#if defined(CONFIG_TUN) \|\| defined(CONFIG_TUN_MODULE)
05c2828c MT	23	struct socket tun_get_socket(struct file );
5990a305	24	struct ptr_ring tun_get_tx_ring(struct file file);
1ffcbc85	25	bool tun_is_xdp_frame(void *ptr);
fc72d1d5 JW	26	void tun_xdp_to_ptr(void ptr);
fc72d1d5 JW	27	void tun_ptr_to_xdp(void ptr);
3a403076	28	void tun_ptr_free(void *ptr);
05c2828c MT	29	#else
	30	#include <linux/err.h>
	31	#include <linux/errno.h>
	32	struct file;
	33	struct socket;
	34	static inline struct socket tun_get_socket(struct file f)
	35	{
	36	return ERR_PTR(-EINVAL);
	37	}
5990a305	38	static inline struct ptr_ring tun_get_tx_ring(struct file f)
83339c6b JW	39	{
	40	return ERR_PTR(-EINVAL);
	41	}
1ffcbc85	42	static inline bool tun_is_xdp_frame(void *ptr)
fc72d1d5 JW	43	{
	44	return false;
	45	}
1125b008	46	static inline void tun_xdp_to_ptr(void ptr)
fc72d1d5 JW	47	{
	48	return NULL;
	49	}
1125b008	50	static inline void tun_ptr_to_xdp(void ptr)
fc72d1d5 JW	51	{
	52	return NULL;
	53	}
3a403076 JW	54	static inline void tun_ptr_free(void *ptr)
	55	{
	56	}
05c2828c	57	#endif /* CONFIG_TUN */
1da177e4	58	#endif /* __IF_TUN_H */