Linux kernel mirror (for testing)
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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.
14 */
15#ifndef __IF_TUN_H
16#define __IF_TUN_H
17
18#include <uapi/linux/if_tun.h>
19
20#define TUN_XDP_FLAG 0x1UL
21
22#if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
23struct socket *tun_get_socket(struct file *);
24struct ptr_ring *tun_get_tx_ring(struct file *file);
25bool tun_is_xdp_buff(void *ptr);
26void *tun_xdp_to_ptr(void *ptr);
27void *tun_ptr_to_xdp(void *ptr);
28#else
29#include <linux/err.h>
30#include <linux/errno.h>
31struct file;
32struct socket;
33static inline struct socket *tun_get_socket(struct file *f)
34{
35 return ERR_PTR(-EINVAL);
36}
37static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
38{
39 return ERR_PTR(-EINVAL);
40}
41static inline bool tun_is_xdp_buff(void *ptr)
42{
43 return false;
44}
45static inline void *tun_xdp_to_ptr(void *ptr)
46{
47 return NULL;
48}
49static inline void *tun_ptr_to_xdp(void *ptr)
50{
51 return NULL;
52}
53#endif /* CONFIG_TUN */
54#endif /* __IF_TUN_H */