xtensa: fix high memory/reserved memory collision
[cris-mirror.git] / include / linux / if_tun.h
blobc5b0a75a78121935e3ab2874c03a1b9bc123f1cf
1 /*
2 * Universal TUN/TAP device driver.
3 * Copyright (C) 1999-2000 Maxim Krasnyansky <max_mk@yahoo.com>
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.
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.
15 #ifndef __IF_TUN_H
16 #define __IF_TUN_H
18 #include <uapi/linux/if_tun.h>
20 #define TUN_XDP_FLAG 0x1UL
22 #if defined(CONFIG_TUN) || defined(CONFIG_TUN_MODULE)
23 struct socket *tun_get_socket(struct file *);
24 struct ptr_ring *tun_get_tx_ring(struct file *file);
25 bool tun_is_xdp_buff(void *ptr);
26 void *tun_xdp_to_ptr(void *ptr);
27 void *tun_ptr_to_xdp(void *ptr);
28 #else
29 #include <linux/err.h>
30 #include <linux/errno.h>
31 struct file;
32 struct socket;
33 static inline struct socket *tun_get_socket(struct file *f)
35 return ERR_PTR(-EINVAL);
37 static inline struct ptr_ring *tun_get_tx_ring(struct file *f)
39 return ERR_PTR(-EINVAL);
41 static inline bool tun_is_xdp_buff(void *ptr)
43 return false;
45 static inline void *tun_xdp_to_ptr(void *ptr)
47 return NULL;
49 static inline void *tun_ptr_to_xdp(void *ptr)
51 return NULL;
53 #endif /* CONFIG_TUN */
54 #endif /* __IF_TUN_H */