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SubjectRe: [RFC PATCH 4/5] linux/virtio_net.h: Added Support for GSO_UDP_L4 offload.
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在 2022/1/25 下午4:47, Andrew Melnychenko 写道:
> Now, it's possible to convert vnet packets from/to skb.


I suggest to change the title to "net: support XXX offload in vnet header"

Thanks


>
> Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
> ---
> include/linux/virtio_net.h | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h
> index a960de68ac69..9311d41d0a81 100644
> --- a/include/linux/virtio_net.h
> +++ b/include/linux/virtio_net.h
> @@ -17,6 +17,9 @@ static inline bool virtio_net_hdr_match_proto(__be16 protocol, __u8 gso_type)
> case VIRTIO_NET_HDR_GSO_UDP:
> return protocol == cpu_to_be16(ETH_P_IP) ||
> protocol == cpu_to_be16(ETH_P_IPV6);
> + case VIRTIO_NET_HDR_GSO_UDP_L4:
> + return protocol == cpu_to_be16(ETH_P_IP) ||
> + protocol == cpu_to_be16(ETH_P_IPV6);
> default:
> return false;
> }
> @@ -31,6 +34,7 @@ static inline int virtio_net_hdr_set_proto(struct sk_buff *skb,
> switch (hdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN) {
> case VIRTIO_NET_HDR_GSO_TCPV4:
> case VIRTIO_NET_HDR_GSO_UDP:
> + case VIRTIO_NET_HDR_GSO_UDP_L4:
> skb->protocol = cpu_to_be16(ETH_P_IP);
> break;
> case VIRTIO_NET_HDR_GSO_TCPV6:
> @@ -69,6 +73,11 @@ static inline int virtio_net_hdr_to_skb(struct sk_buff *skb,
> ip_proto = IPPROTO_UDP;
> thlen = sizeof(struct udphdr);
> break;
> + case VIRTIO_NET_HDR_GSO_UDP_L4:
> + gso_type = SKB_GSO_UDP_L4;
> + ip_proto = IPPROTO_UDP;
> + thlen = sizeof(struct udphdr);
> + break;
> default:
> return -EINVAL;
> }
> @@ -182,6 +191,8 @@ static inline int virtio_net_hdr_from_skb(const struct sk_buff *skb,
> hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV4;
> else if (sinfo->gso_type & SKB_GSO_TCPV6)
> hdr->gso_type = VIRTIO_NET_HDR_GSO_TCPV6;
> + else if (sinfo->gso_type & SKB_GSO_UDP_L4)
> + hdr->gso_type = VIRTIO_NET_HDR_GSO_UDP_L4;
> else
> return -EINVAL;
> if (sinfo->gso_type & SKB_GSO_TCP_ECN)

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