1 #ifndef _LINUX_VIRTIO_NET_H
2 #define _LINUX_VIRTIO_NET_H
3 /* This header is BSD licensed so anyone can use the definitions to implement
4 * compatible drivers/servers. */
5 #include <linux/types.h>
6 #include <linux/virtio_config.h>
8 /* The ID for virtio_net */
9 #define VIRTIO_ID_NET 1
11 /* The feature bitmap for virtio net */
12 #define VIRTIO_NET_F_CSUM 0 /* Host handles pkts w/ partial csum */
13 #define VIRTIO_NET_F_GUEST_CSUM 1 /* Guest handles pkts w/ partial csum */
14 #define VIRTIO_NET_F_MAC 5 /* Host has given MAC address. */
15 #define VIRTIO_NET_F_GSO 6 /* Host handles pkts w/ any GSO type */
16 #define VIRTIO_NET_F_GUEST_TSO4 7 /* Guest can handle TSOv4 in. */
17 #define VIRTIO_NET_F_GUEST_TSO6 8 /* Guest can handle TSOv6 in. */
18 #define VIRTIO_NET_F_GUEST_ECN 9 /* Guest can handle TSO[6] w/ ECN in. */
19 #define VIRTIO_NET_F_GUEST_UFO 10 /* Guest can handle UFO in. */
20 #define VIRTIO_NET_F_HOST_TSO4 11 /* Host can handle TSOv4 in. */
21 #define VIRTIO_NET_F_HOST_TSO6 12 /* Host can handle TSOv6 in. */
22 #define VIRTIO_NET_F_HOST_ECN 13 /* Host can handle TSO[6] w/ ECN in. */
23 #define VIRTIO_NET_F_HOST_UFO 14 /* Host can handle UFO in. */
24 #define VIRTIO_NET_F_MRG_RXBUF 15 /* Host can merge receive buffers. */
26 struct virtio_net_config
28 /* The config defining mac address (if VIRTIO_NET_F_MAC) */
30 } __attribute__((packed
));
32 /* This is the first element of the scatter-gather list. If you don't
33 * specify GSO or CSUM features, you can simply ignore the header. */
36 #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset
38 #define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame
39 #define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO)
40 #define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO)
41 #define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP
42 #define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set
44 __u16 hdr_len
; /* Ethernet + IP + tcp/udp hdrs */
45 __u16 gso_size
; /* Bytes to append to hdr_len per frame */
46 __u16 csum_start
; /* Position to start checksumming from */
47 __u16 csum_offset
; /* Offset after that to place checksum */
50 /* This is the version of the header to use when the MRG_RXBUF
51 * feature has been negotiated. */
52 struct virtio_net_hdr_mrg_rxbuf
{
53 struct virtio_net_hdr hdr
;
54 __u16 num_buffers
; /* Number of merged rx buffers */
57 #endif /* _LINUX_VIRTIO_NET_H */
This page took 0.031279 seconds and 5 git commands to generate.