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Commit 529ec6ac authored by Jakub Kicinski's avatar Jakub Kicinski Committed by David S. Miller
Browse files

virtio_net: reject XDP programs using header adjustment 



commit 17bedab2 ("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: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Acked-by: default avatarJohn Fastabend <john.r.fastabend@intel.com>
Acked-by: default avatarJason Wang <jasowang@redhat.com>
Acked-by: default avatarMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b68df015

drivers/net/virtio_net.c

+5 −0
Original line number Diff line number Diff line
@@ -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) ||