1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(c) 2016 Intel Corporation
5 #ifndef _VHOST_KERNEL_TAP_H
6 #define _VHOST_KERNEL_TAP_H
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)
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
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 */
34 #define PATH_NET_TUN "/dev/net/tun"
36 int vhost_kernel_tap_setup(int tapfd, int hdr_size, uint64_t features);
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);