tun: Implement ethtool's get_channels() callback
Implement the tun .get_channels functionality. This feature is necessary for some tools, such as libxdp, which need to retrieve the queue count. Signed-off-by: Yunjian Wang <wangyunjian@huawei.com> Reviewed-by: Jiri Pirko <jiri@nvidia.com> Reviewed-by: Willem de Bruijn <willemb@google.com> Acked-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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@ -3643,12 +3643,22 @@ static int tun_set_coalesce(struct net_device *dev,
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return 0;
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}
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static void tun_get_channels(struct net_device *dev,
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struct ethtool_channels *channels)
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{
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struct tun_struct *tun = netdev_priv(dev);
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channels->combined_count = tun->numqueues;
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channels->max_combined = tun->flags & IFF_MULTI_QUEUE ? MAX_TAP_QUEUES : 1;
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}
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static const struct ethtool_ops tun_ethtool_ops = {
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.supported_coalesce_params = ETHTOOL_COALESCE_RX_MAX_FRAMES,
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.get_drvinfo = tun_get_drvinfo,
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.get_msglevel = tun_get_msglevel,
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.set_msglevel = tun_set_msglevel,
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.get_link = ethtool_op_get_link,
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.get_channels = tun_get_channels,
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.get_ts_info = ethtool_op_get_ts_info,
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.get_coalesce = tun_get_coalesce,
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.set_coalesce = tun_set_coalesce,
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