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tun: Implement ethtool's get_channels() callback

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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>
This commit is contained in:
Yunjian Wang 2024-02-02 15:53:20 +08:00 committed by David S. Miller
parent bd8a8d5ec5
commit 45a96c407e
1 changed files with 10 additions and 0 deletions
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10
drivers/net/tun.c
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@ -3643,12 +3643,22 @@ static int tun_set_coalesce(struct net_device *dev,
return 0;
}
static void tun_get_channels(struct net_device *dev,
struct ethtool_channels *channels)
{
struct tun_struct *tun = netdev_priv(dev);
channels->combined_count = tun->numqueues;
channels->max_combined = tun->flags & IFF_MULTI_QUEUE ? MAX_TAP_QUEUES : 1;
}
static const struct ethtool_ops tun_ethtool_ops = {
.supported_coalesce_params = ETHTOOL_COALESCE_RX_MAX_FRAMES,
.get_drvinfo = tun_get_drvinfo,
.get_msglevel = tun_get_msglevel,
.set_msglevel = tun_set_msglevel,
.get_link = ethtool_op_get_link,
.get_channels = tun_get_channels,
.get_ts_info = ethtool_op_get_ts_info,
.get_coalesce = tun_get_coalesce,
.set_coalesce = tun_set_coalesce,