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 #define TUNSETQUEUE _IOW('T', 217, int) 20 #define TUNSETVNETLE _IOW('T', 220, int) 21 #define TUNSETVNETBE _IOW('T', 222, int) 22 23 /* TUNSETIFF ifr flags */ 24 #define IFF_TAP 0x0002 25 #define IFF_NO_PI 0x1000 26 #define IFF_ONE_QUEUE 0x2000 27 #define IFF_VNET_HDR 0x4000 28 #define IFF_MULTI_QUEUE 0x0100 29 #define IFF_ATTACH_QUEUE 0x0200 30 #define IFF_DETACH_QUEUE 0x0400 31 32 /* Features for GSO (TUNSETOFFLOAD). */ 33 #define TUN_F_CSUM 0x01 /* You can hand me unchecksummed packets. */ 34 #define TUN_F_TSO4 0x02 /* I can handle TSO for IPv4 packets */ 35 #define TUN_F_TSO6 0x04 /* I can handle TSO for IPv6 packets */ 36 #define TUN_F_TSO_ECN 0x08 /* I can handle TSO with ECN bits. */ 37 #define TUN_F_UFO 0x10 /* I can handle UFO packets */ 38 39 /* Constants */ 40 #define PATH_NET_TUN "/dev/net/tun" 41 42 int vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq, 43 const char *mac, uint64_t features); 44 int vhost_kernel_tap_set_offload(int fd, uint64_t features); 45 int vhost_kernel_tap_set_queue(int fd, bool attach); 46 int tap_support_features(unsigned int *tap_features); 47 48 #endif 49