The virtio_net driver doesn't dynamically change the RX-ring queue
layout and backing pages, but instead reject XDP setup if all the
conditions for XDP is not meet. Thus, the xdp_rxq_info also remains
fairly static. This allow us to simply add the reg/unreg to
net_device open/close functions.
V3:
- bugfix, also setup xdp.rxq in receive_mergeable()
- Tested bpf-sample prog inside guest on a virtio_net device
Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: virtualization@lists.linux-foundation.org Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com> Reviewed-by: Jason Wang <jasowang@redhat.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org>