diff options
Diffstat (limited to 'include/uapi/linux/virtio_net.h')
| -rw-r--r-- | include/uapi/linux/virtio_net.h | 54 |
1 files changed, 25 insertions, 29 deletions
diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h index 4a9b58113d6e..7bbee79ca293 100644 --- a/include/uapi/linux/virtio_net.h +++ b/include/uapi/linux/virtio_net.h @@ -74,39 +74,12 @@ struct virtio_net_config { __u16 max_virtqueue_pairs; } __attribute__((packed)); -#ifndef VIRTIO_NET_NO_LEGACY -/* This header comes first in the scatter-gather list. - * For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, it must - * be the first element of the scatter-gather list. If you don't - * specify GSO or CSUM features, you can simply ignore the header. */ -struct virtio_net_hdr { -#define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 // Use csum_start, csum_offset -#define VIRTIO_NET_HDR_F_DATA_VALID 2 // Csum is valid - __u8 flags; -#define VIRTIO_NET_HDR_GSO_NONE 0 // Not a GSO frame -#define VIRTIO_NET_HDR_GSO_TCPV4 1 // GSO frame, IPv4 TCP (TSO) -#define VIRTIO_NET_HDR_GSO_UDP 3 // GSO frame, IPv4 UDP (UFO) -#define VIRTIO_NET_HDR_GSO_TCPV6 4 // GSO frame, IPv6 TCP -#define VIRTIO_NET_HDR_GSO_ECN 0x80 // TCP has ECN set - __u8 gso_type; - __virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */ - __virtio16 gso_size; /* Bytes to append to hdr_len per frame */ - __virtio16 csum_start; /* Position to start checksumming from */ - __virtio16 csum_offset; /* Offset after that to place checksum */ -}; - -/* This is the version of the header to use when the MRG_RXBUF - * feature has been negotiated. */ -struct virtio_net_hdr_mrg_rxbuf { - struct virtio_net_hdr hdr; - __virtio16 num_buffers; /* Number of merged rx buffers */ -}; -#else /* ... VIRTIO_NET_NO_LEGACY */ /* * This header comes first in the scatter-gather list. If you don't * specify GSO or CSUM features, you can simply ignore the header. * - * This is bitwise-equivalent to the legacy struct virtio_net_hdr_mrg_rxbuf. + * This is bitwise-equivalent to the legacy struct virtio_net_hdr_mrg_rxbuf, + * only flattened. */ struct virtio_net_hdr_v1 { #define VIRTIO_NET_HDR_F_NEEDS_CSUM 1 /* Use csum_start, csum_offset */ @@ -124,6 +97,29 @@ struct virtio_net_hdr_v1 { __virtio16 csum_offset; /* Offset after that to place checksum */ __virtio16 num_buffers; /* Number of merged rx buffers */ }; + +#ifndef VIRTIO_NET_NO_LEGACY +/* This header comes first in the scatter-gather list. + * For legacy virtio, if VIRTIO_F_ANY_LAYOUT is not negotiated, it must + * be the first element of the scatter-gather list. If you don't + * specify GSO or CSUM features, you can simply ignore the header. */ +struct virtio_net_hdr { + /* See VIRTIO_NET_HDR_F_* */ + __u8 flags; + /* See VIRTIO_NET_HDR_GSO_* */ + __u8 gso_type; + __virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */ + __virtio16 gso_size; /* Bytes to append to hdr_len per frame */ + __virtio16 csum_start; /* Position to start checksumming from */ + __virtio16 csum_offset; /* Offset after that to place checksum */ +}; + +/* This is the version of the header to use when the MRG_RXBUF + * feature has been negotiated. */ +struct virtio_net_hdr_mrg_rxbuf { + struct virtio_net_hdr hdr; + __virtio16 num_buffers; /* Number of merged rx buffers */ +}; #endif /* ...VIRTIO_NET_NO_LEGACY */ /* |