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SubjectRe: [RFC PATCH 1/4] drivers/net/virtio_net: Fixed vheader to use v1.
On Mon, Nov 1, 2021 at 10:40 AM Michael S. Tsirkin <mst@redhat.com> wrote:
>
> On Sun, Oct 31, 2021 at 06:59:56AM +0200, Andrew Melnychenko wrote:
> > The header v1 provides additional info about RSS.
> > Added changes to computing proper header length.
> > In the next patches, the header may contain RSS hash info
> > for the hash population.
> >
> > Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
> > ---
> > drivers/net/virtio_net.c | 6 +++---
> > 1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c
> > index 4ad25a8b0870..b72b21ac8ebd 100644
> > --- a/drivers/net/virtio_net.c
> > +++ b/drivers/net/virtio_net.c
> > @@ -240,13 +240,13 @@ struct virtnet_info {
> > };
> >
> > struct padded_vnet_hdr {
> > - struct virtio_net_hdr_mrg_rxbuf hdr;
> > + struct virtio_net_hdr_v1_hash hdr;
> > /*
> > * hdr is in a separate sg buffer, and data sg buffer shares same page
> > * with this header sg. This padding makes next sg 16 byte aligned
> > * after the header.
> > */
> > - char padding[4];
> > + char padding[12];
> > };
> >
> > static bool is_xdp_frame(void *ptr)
>
>
> This is not helpful as a separate patch, just reserving extra space.
> better squash with the patches making use of the change.

Ok.


>
> > @@ -1636,7 +1636,7 @@ static int xmit_skb(struct send_queue *sq, struct sk_buff *skb)
> > const unsigned char *dest = ((struct ethhdr *)skb->data)->h_dest;
> > struct virtnet_info *vi = sq->vq->vdev->priv;
> > int num_sg;
> > - unsigned hdr_len = vi->hdr_len;
> > + unsigned int hdr_len = vi->hdr_len;
> > bool can_push;
>
>
> if we want this, pls make it a separate patch.

Ok. I've added that change after checkpatch warnings. Technically,
checkpatch should not fail on the patch without that line.

>
>
> >
> > pr_debug("%s: xmit %p %pM\n", vi->dev->name, skb, dest);
> > --
> > 2.33.1
>

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