net/xen-netfront: add kernel TX timestamps

This adds kernel TX timestamps to the xen-netfront driver.  Tested with chrony
on an AWS EC2 instance.

Signed-off-by: Daniel Drown <dan-netdev@drown.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 860a0cc..ed995df 100644 (file)
--- a/drivers/net/xen-netfront.c
+++ b/drivers/net/xen-netfront.c
@@ -754,6 +754,9 @@ static netdev_tx_t xennet_start_xmit(struct sk_buff *skb, struct net_device *dev
        /* First request has the packet length. */
        first_tx->size = skb->len;
 
+       /* timestamp packet in software */
+       skb_tx_timestamp(skb);
+
        RING_PUSH_REQUESTS_AND_CHECK_NOTIFY(&queue->tx, notify);
        if (notify)
                notify_remote_via_irq(queue->tx_irq);
@@ -2411,6 +2414,7 @@ static const struct ethtool_ops xennet_ethtool_ops =
        .get_sset_count = xennet_get_sset_count,
        .get_ethtool_stats = xennet_get_ethtool_stats,
        .get_strings = xennet_get_strings,
+       .get_ts_info = ethtool_op_get_ts_info,
 };
 
 #ifdef CONFIG_SYSFS