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Commit aa4e689e authored by Michael Walle's avatar Michael Walle Committed by David S. Miller
Browse files

veth: add software timestamping 



Provide a software TX timestamp as well as the ethtool query interface
and report the software timestamp capabilities.

Tested with "ethtool -T" and two linuxptp instances each bound to a
tunnel endpoint.

Signed-off-by: default avatarMichael Walle <michael@walle.cc>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent f061b48c

drivers/net/veth.c

+15 −0
Original line number Diff line number Diff line
@@ -24,6 +24,7 @@ 
#include <linux/filter.h>

#include <linux/ptr_ring.h>

#include <linux/bpf_trace.h>

#include <linux/net_tstamp.h>



#define DRV_NAME	"veth"

#define DRV_VERSION	"1.0"
@@ -114,6 +115,18 @@ static void veth_get_ethtool_stats(struct net_device *dev, 
	data[0] = peer ? peer->ifindex : 0;

}



static int veth_get_ts_info(struct net_device *dev,

			    struct ethtool_ts_info *info)

{

	info->so_timestamping =

		SOF_TIMESTAMPING_TX_SOFTWARE |

		SOF_TIMESTAMPING_RX_SOFTWARE |

		SOF_TIMESTAMPING_SOFTWARE;

	info->phc_index = -1;



	return 0;

}



static const struct ethtool_ops veth_ethtool_ops = {

	.get_drvinfo		= veth_get_drvinfo,

	.get_link		= ethtool_op_get_link,
@@ -121,6 +134,7 @@ static const struct ethtool_ops veth_ethtool_ops = { 
	.get_sset_count		= veth_get_sset_count,

	.get_ethtool_stats	= veth_get_ethtool_stats,

	.get_link_ksettings	= veth_get_link_ksettings,

	.get_ts_info		= veth_get_ts_info,

};



/* general routines */
@@ -201,6 +215,7 @@ static netdev_tx_t veth_xmit(struct sk_buff *skb, struct net_device *dev) 
			skb_record_rx_queue(skb, rxq);

	}



	skb_tx_timestamp(skb);

	if (likely(veth_forward_skb(rcv, skb, rq, rcv_xdp) == NET_RX_SUCCESS)) {

		struct pcpu_vstats *stats = this_cpu_ptr(dev->vstats);