1 /* SPDX-License-Identifier: BSD-3-Clause 2 * Copyright(c) 2016 Intel Corporation 3 */ 4 5 #ifndef _VHOST_KERNEL_TAP_H 6 #define _VHOST_KERNEL_TAP_H 7 8 #include <stdbool.h> 9 #include <sys/ioctl.h> 10 11 /* TUN ioctls */ 12 #define TUNSETIFF _IOW('T', 202, int) 13 #define TUNGETFEATURES _IOR('T', 207, unsigned int) 14 #define TUNSETOFFLOAD _IOW('T', 208, unsigned int) 15 #define TUNGETIFF _IOR('T', 210, unsigned int) 16 #define TUNSETSNDBUF _IOW('T', 212, int) 17 #define TUNGETVNETHDRSZ _IOR('T', 215, int) 18 #define TUNSETVNETHDRSZ _IOW('T', 216, int) 19 20 /* TUNSETIFF ifr flags */ 21 #define IFF_TAP 0x0002 22 #define IFF_NO_PI 0x1000 23 #define IFF_VNET_HDR 0x4000 24 #define IFF_MULTI_QUEUE 0x0100 25 26 /* Features for GSO (TUNSETOFFLOAD). */ 27 #define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */ 28 #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ 29 #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ 30 #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ 31 #define TUN_F_UFO 0x10 /* I can handle UFO packets */ 32 33 /* Constants */ 34 #define PATH_NET_TUN "/dev/net/tun" 35 36 int vhost_kernel_tap_setup(int tapfd, int hdr_size, uint64_t features); 37 38 int tap_support_features(unsigned int *tap_features); 39 int tap_open(const char *ifname, bool multi_queue); 40 int tap_get_name(int tapfd, char **ifname); 41 int tap_get_flags(int tapfd, unsigned int *tap_flags); 42 int tap_set_mac(int tapfd, uint8_t *mac); 43 44 #endif 45