Commit 4f49129b authored Aug 27, 2013 by Thomas Huth Committed by David S. Miller Sep 03, 2013

virtio-net: Set RXCSUM feature if GUEST_CSUM is available



If the VIRTIO_NET_F_GUEST_CSUM virtio feature is available, the guest
does not have to calculate the checksums on all received packets. This
is pretty much the same feature as RX checksum offloading on real
network cards, so the virtio-net driver should report this by setting
the NETIF_F_RXCSUM flag. When the user now runs "ethtool -k", he or she
can see whether the virtio-net interface has to calculate RX checksums
or not.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent 61c8106e

drivers/net/virtio_net.c

+2 −0

Original line number	Diff line number	Diff line
		@@ -1538,6 +1538,8 @@ static int virtnet_probe(struct virtio_device *vdev)
		dev->features \|= dev->hw_features & (NETIF_F_ALL_TSO\|NETIF_F_UFO);
		/* (!csum && gso) case will be fixed by register_netdev() */
		}
		if (virtio_has_feature(vdev, VIRTIO_NET_F_GUEST_CSUM))
		dev->features \|= NETIF_F_RXCSUM;

		dev->vlan_features = dev->features;

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