search for: hdr_ext

Curreclty virtion net header is fixed size and adding things to it is rather difficult to do. This series attempt to add the infrastructure as well as some extensions that try to resolve some deficiencies we currently have. First, vnet header only has space for 16 flags. This may not be enough in the future. The extensions will provide space for 32 possbile extension flags and 32 possible

Curreclty virtion net header is fixed size and adding things to it is rather difficult to do. This series attempt to add the infrastructure as well as some extensions that try to resolve some deficiencies we currently have. First, vnet header only has space for 16 flags. This may not be enough in the future. The extensions will provide space for 32 possbile extension flags and 32 possible

...diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c index 5ad6ee6..08e2709 100644 --- a/drivers/net/virtio_net.c +++ b/drivers/net/virtio_net.c @@ -145,6 +145,10 @@ struct virtnet_info { /* Packet virtio header size */ u8 hdr_len; + /* Header extensions were negotiated */ + bool hdr_ext; + u32 ext_mask; + /* Active statistics */ struct virtnet_stats __percpu *stats; @@ -174,6 +178,11 @@ struct virtnet_info { u32 speed; }; +struct virtio_net_hdr_max { + struct virtio_net_hdr_mrg_rxbuf hdr; + struct virtio_net_ext_hdr ext_hdr; +}; + static inline u8 padded_vnet_hdr(struc...

...virtio_device *vdev) if (virtio_has_feature(vdev, VIRTIO_NET_F_MRG_RXBUF)) vi->mergeable_rx_bufs = true; - if (virtio_has_feature(vdev, VIRTIO_NET_F_IP6_FRAGID)) + if (virtio_has_feature(vdev, VIRTIO_NET_F_IP6_FRAGID) || + virtio_has_feature(vdev, VIRTIO_NET_F_VLAN_OFFLOAD)) vi->hdr_ext = true; if (vi->hdr_ext) diff --git a/include/linux/virtio_net.h b/include/linux/virtio_net.h index 3b259dc..e790191 100644 --- a/include/linux/virtio_net.h +++ b/include/linux/virtio_net.h @@ -113,6 +113,14 @@ static inline int virtio_net_ext_to_skb(struct sk_buff *skb, ptr += sizeof(str...