On Wed, Jan 25, 2017 at 02:56:36PM -0800, Jakub Kicinski wrote: > commit 17bedab27231 ("bpf: xdp: Allow head adjustment in XDP prog") > added a new XDP helper to prepend and remove data from a frame. > Make virtio_net reject programs making use of this helper until > proper support is added. > > Signed-off-by: Jakub Kicinski <jakub.kicin...@netronome.com> > Acked-by: John Fastabend <john.r.fastab...@intel.com>
Acked-by: Michael S. Tsirkin <m...@redhat.com> > --- > drivers/net/virtio_net.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > index f9bf94887ff1..a2aac4fd8e42 100644 > --- a/drivers/net/virtio_net.c > +++ b/drivers/net/virtio_net.c > @@ -1710,6 +1710,11 @@ static int virtnet_xdp_set(struct net_device *dev, > struct bpf_prog *prog) > u16 xdp_qp = 0, curr_qp; > int i, err; > > + if (prog && prog->xdp_adjust_head) { > + netdev_warn(dev, "Does not support bpf_xdp_adjust_head()\n"); > + return -EOPNOTSUPP; > + } > + > if (virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_TSO4) || > virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_TSO6) || > virtio_has_feature(vi->vdev, VIRTIO_NET_F_GUEST_ECN) || > -- > 2.11.0