1 /* 2 * Universal TUN/TAP device driver. 3 * Copyright (C) 1999-2000 Maxim Krasnyansky <[email protected]> 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) 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) 34 { 35 return ERR_PTR(-EINVAL); 36 } 37 static inline struct ptr_ring *tun_get_tx_ring(struct file *f) 38 { 39 return ERR_PTR(-EINVAL); 40 } 41 static inline bool tun_is_xdp_buff(void *ptr) 42 { 43 return false; 44 } 45 static inline void *tun_xdp_to_ptr(void *ptr) 46 { 47 return NULL; 48 } 49 static inline void *tun_ptr_to_xdp(void *ptr) 50 { 51 return NULL; 52 } 53 #endif /* CONFIG_TUN */ 54 #endif /* __IF_TUN_H */ 55