netdev - Re: [RFC PATCH 3/5] uapi/linux/virtio

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Date:   Wed, 9 Feb 2022 12:41:08 +0800
From:   Jason Wang <jasowang@...hat.com>
To:     Andrew Melnychenko <andrew@...nix.com>, davem@...emloft.net,
        kuba@...nel.org, mst@...hat.com, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        virtualization@...ts.linux-foundation.org
Cc:     yuri.benditovich@...nix.com, yan@...nix.com
Subject: Re: [RFC PATCH 3/5] uapi/linux/virtio_net.h: Added USO types.


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@...nix.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 */