Commit 529ec6ac authored Jan 25, 2017 by Jakub Kicinski Committed by David S. Miller Jan 25, 2017

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: 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>

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) \|\|

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