On 2017年01月26日 06:56, 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> --- 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) ||
Acked-by: Jason Wang <jasow...@redhat.com>
