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virtio_net: large tx MTU support
We don't really have a max tx packet size limit, so allow configuring the device with up to 64k tx MTU. Signed-off-by: Mark McLoughlin <markmc@redhat.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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1 changed files with 12 additions and 0 deletions
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@ -613,6 +613,17 @@ static struct ethtool_ops virtnet_ethtool_ops = {
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.set_tso = ethtool_op_set_tso,
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.set_tso = ethtool_op_set_tso,
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};
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};
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#define MIN_MTU 68
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#define MAX_MTU 65535
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static int virtnet_change_mtu(struct net_device *dev, int new_mtu)
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{
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if (new_mtu < MIN_MTU || new_mtu > MAX_MTU)
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return -EINVAL;
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dev->mtu = new_mtu;
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return 0;
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}
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static int virtnet_probe(struct virtio_device *vdev)
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static int virtnet_probe(struct virtio_device *vdev)
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{
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{
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int err;
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int err;
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@ -628,6 +639,7 @@ static int virtnet_probe(struct virtio_device *vdev)
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dev->open = virtnet_open;
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dev->open = virtnet_open;
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dev->stop = virtnet_close;
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dev->stop = virtnet_close;
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dev->hard_start_xmit = start_xmit;
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dev->hard_start_xmit = start_xmit;
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dev->change_mtu = virtnet_change_mtu;
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dev->features = NETIF_F_HIGHDMA;
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dev->features = NETIF_F_HIGHDMA;
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#ifdef CONFIG_NET_POLL_CONTROLLER
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#ifdef CONFIG_NET_POLL_CONTROLLER
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dev->poll_controller = virtnet_netpoll;
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dev->poll_controller = virtnet_netpoll;
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