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SubjectRe: [RFC PATCH 3/5] uapi/linux/virtio_net.h: Added USO types.
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在 2022/1/25 下午4:47, Andrew Melnychenko 写道:
> Added new GSO type for USO: VIRTIO_NET_HDR_GSO_UDP_L4.
> Feature VIRTIO_NET_F_HOST_USO allows to enable NETIF_F_GSO_UDP_L4.
> Separated VIRTIO_NET_F_GUEST_USO4 & VIRTIO_NET_F_GUEST_USO6 features
> required for Windows guests.
>
> Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
> ---
> include/uapi/linux/virtio_net.h | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/include/uapi/linux/virtio_net.h b/include/uapi/linux/virtio_net.h
> index 3f55a4215f11..620addc5767b 100644
> --- a/include/uapi/linux/virtio_net.h
> +++ b/include/uapi/linux/virtio_net.h
> @@ -56,6 +56,9 @@
> #define VIRTIO_NET_F_MQ 22 /* Device supports Receive Flow
> * Steering */
> #define VIRTIO_NET_F_CTRL_MAC_ADDR 23 /* Set MAC address */
> +#define VIRTIO_NET_F_GUEST_USO4 54 /* Guest can handle USOv4 in. */
> +#define VIRTIO_NET_F_GUEST_USO6 55 /* Guest can handle USOv6 in. */
> +#define VIRTIO_NET_F_HOST_USO 56 /* Host can handle USO in. */


I think it's better to be consistent here. Either we split in both guest
and host or not.

Thanks


>
> #define VIRTIO_NET_F_HASH_REPORT 57 /* Supports hash report */
> #define VIRTIO_NET_F_RSS 60 /* Supports RSS RX steering */
> @@ -130,6 +133,7 @@ struct virtio_net_hdr_v1 {
> #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_UDP_L4 5 /* GSO frame, IPv4 & IPv6 UDP (USO) */
> #define VIRTIO_NET_HDR_GSO_ECN 0x80 /* TCP has ECN set */
> __u8 gso_type;
> __virtio16 hdr_len; /* Ethernet + IP + tcp/udp hdrs */

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