On Wed, 24 Jan 2024 16:57:20 +0800, Liang Chen <liangchen.li...@gmail.com> wrote: > For the XDP_PASS scenario of the XDP path, the skb constructed with > xdp_buff does not include the virtio header. Adding the virtio header > information back when creating the skb. > > Signed-off-by: Liang Chen <liangchen.li...@gmail.com> > --- > drivers/net/virtio_net.c | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > index b56828804e5f..2de46eb4c661 100644 > --- a/drivers/net/virtio_net.c > +++ b/drivers/net/virtio_net.c > @@ -1270,6 +1270,9 @@ static struct sk_buff *receive_small_xdp(struct > net_device *dev, > if (unlikely(!skb)) > goto err; > > + /* Store the original virtio header for subsequent use by the driver. */ > + memcpy(skb_vnet_common_hdr(skb), &virtnet_xdp.hdr, vi->hdr_len);
About this, a spec is waiting for voting. This may change the logic of the csum offset and so on. Please not do this. Thanks. > + > if (metasize) > skb_metadata_set(skb, metasize); > > @@ -1635,6 +1638,9 @@ static struct sk_buff *receive_mergeable_xdp(struct > net_device *dev, > head_skb = build_skb_from_xdp_buff(dev, vi, xdp, > xdp_frags_truesz); > if (unlikely(!head_skb)) > break; > + /* Store the original virtio header for subsequent use by the > driver. */ > + memcpy(skb_vnet_common_hdr(head_skb), &virtnet_xdp.hdr, > vi->hdr_len); > + > return head_skb; > > case XDP_TX: > -- > 2.40.1 >
