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virtio_net: reject XDP programs using header adjustment 

commit 17bedab272 ("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.kicinski@netronome.com>
Acked-by: John Fastabend <john.r.fastabend@intel.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
hifive-unleashed-5.1
Jakub Kicinski 2017-01-25 14:56:36 -08:00 committed by David S. Miller
parent b68df01560
commit 529ec6ac26
1 changed files with 5 additions and 0 deletions
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5
drivers/net/virtio_net.c
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@ -1715,6 +1715,11 @@ 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) ||