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) 23 struct socket *tun_get_socket(struct file *); 24 struct ptr_ring *tun_get_tx_ring(struct file *file); 25 bool tun_is_xdp_frame(void *ptr); 26 void *tun_xdp_to_ptr(void *ptr); 27 void *tun_ptr_to_xdp(void *ptr); 28 void tun_ptr_free(void *ptr); 29 #else 30 #include <linux/err.h> 31 #include <linux/errno.h> 32 struct file; 33 struct socket; tun_get_socket(struct file * f)34static inline struct socket *tun_get_socket(struct file *f) 35 { 36 return ERR_PTR(-EINVAL); 37 } tun_get_tx_ring(struct file * f)38static inline struct ptr_ring *tun_get_tx_ring(struct file *f) 39 { 40 return ERR_PTR(-EINVAL); 41 } tun_is_xdp_frame(void * ptr)42static inline bool tun_is_xdp_frame(void *ptr) 43 { 44 return false; 45 } tun_xdp_to_ptr(void * ptr)46static inline void *tun_xdp_to_ptr(void *ptr) 47 { 48 return NULL; 49 } tun_ptr_to_xdp(void * ptr)50static inline void *tun_ptr_to_xdp(void *ptr) 51 { 52 return NULL; 53 } tun_ptr_free(void * ptr)54static inline void tun_ptr_free(void *ptr) 55 { 56 } 57 #endif /* CONFIG_TUN */ 58 #endif /* __IF_TUN_H */ 59
