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veth: Implement ethtool's get_channels() callback

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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
This commit is contained in:
Maciej Fijalkowski 2021-03-30 00:43:12 +02:00 committed by Alexei Starovoitov
parent 0464b1ed07
commit 34829eec3b
1 changed files with 12 additions and 0 deletions
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12
drivers/net/veth.c
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@ -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 */