virtio-net: ethtool configurable LRO
Virtio-net devices negotiate LRO support with the host. Display the initially negotiated state with ethtool -k. Also allow configuring it with ethtool -K, reusing the existing virtnet_set_guest_offloads helper that configures LRO for XDP. This is conditional on VIRTIO_NET_F_CTRL_GUEST_OFFLOADS. Virtio-net negotiates TSO4 and TSO6 separately, but ethtool does not distinguish between the two. Display LRO as on only if any offload is active. RTNL is held while calling virtnet_set_features, same as on the path from virtnet_xdp_set. Changes v1 -> v2 - allow ethtool config (-K) only if VIRTIO_NET_F_CTRL_GUEST_OFFLOADS - show LRO as enabled if any LRO variant is enabled - do not allow configuration while XDP is active - differentiate current features from the capable set, to restore on XDP down only those features that were active on XDP up - move test out of VIRTIO_NET_F_CSUM/TSO branch, which is tx only Signed-off-by:Willem de Bruijn <willemb@google.com> Acked-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
parent
c3e53369
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