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)
19 #define TUNSETQUEUE _IOW('T', 217, int)
20 #define TUNSETVNETLE _IOW('T', 220, int)
21 #define TUNSETVNETBE _IOW('T', 222, int)
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
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 */
40 #define PATH_NET_TUN "/dev/net/tun"
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);