veth: Implement ethtool's get_channels() callback
Libbpf's xsk part calls get_channels() API to retrieve the queue count
of the underlying driver so that XSKMAP is sized accordingly.
Implement that in veth so multi queue scenarios can work properly.
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210329224316.17793-14-maciej.fijalkowski@intel.com
diff --git a/drivers/net/veth.c b/drivers/net/veth.c
index 91b73db..9e52564 100644
--- a/drivers/net/veth.c
+++ b/drivers/net/veth.c
@@ -218,6 +218,17 @@ static void veth_get_ethtool_stats(struct net_device *dev,
}
}
+static void veth_get_channels(struct net_device *dev,
+ struct ethtool_channels *channels)
+{
+ channels->tx_count = dev->real_num_tx_queues;
+ channels->rx_count = dev->real_num_rx_queues;
+ channels->max_tx = dev->real_num_tx_queues;
+ channels->max_rx = dev->real_num_rx_queues;
+ channels->combined_count = min(dev->real_num_rx_queues, dev->real_num_tx_queues);
+ channels->max_combined = min(dev->real_num_rx_queues, dev->real_num_tx_queues);
+}
+
static const struct ethtool_ops veth_ethtool_ops = {
.get_drvinfo = veth_get_drvinfo,
.get_link = ethtool_op_get_link,
@@ -226,6 +237,7 @@ static const struct ethtool_ops veth_ethtool_ops = {
.get_ethtool_stats = veth_get_ethtool_stats,
.get_link_ksettings = veth_get_link_ksettings,
.get_ts_info = ethtool_op_get_ts_info,
+ .get_channels = veth_get_channels,
};
/* general routines */