[PATCH net-next] net/xen-netfront: add kernel TX timestamps

[Daniel Drown]

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

Signed-off-by: Daniel Drown <dan-net...@drown.org>
---
 drivers/net/xen-netfront.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c
index 860a0cce346d..ed995df19247 100644
--- 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
-- 
2.21.3