netdev - [PATCH 1/1] xen-netback: add software timestamp capabilities

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Message-Id: <20231010142630.984585-2-luca.fancellu@arm.com>
Date: Tue, 10 Oct 2023 15:26:30 +0100
From: Luca Fancellu <luca.fancellu@....com>
To: linux-kernel@...r.kernel.org
Cc: Wei Liu <wei.liu@...nel.org>,
	Paul Durrant <paul@....org>,
	xen-devel@...ts.xenproject.org,
	netdev@...r.kernel.org,
	Rahul Singh <rahul.singh@....com>
Subject: [PATCH 1/1] xen-netback: add software timestamp capabilities

Add software timestamp capabilities to the xen-netback driver
by advertising it on the struct ethtool_ops and calling
skb_tx_timestamp before passing the buffer to the queue.

Signed-off-by: Luca Fancellu <luca.fancellu@....com>
---
 drivers/net/xen-netback/interface.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/net/xen-netback/interface.c b/drivers/net/xen-netback/interface.c
index f3f2c07423a6..b71158967123 100644
--- a/drivers/net/xen-netback/interface.c
+++ b/drivers/net/xen-netback/interface.c
@@ -254,6 +254,9 @@ xenvif_start_xmit(struct sk_buff *skb, struct net_device *dev)
 	if (vif->hash.alg == XEN_NETIF_CTRL_HASH_ALGORITHM_NONE)
 		skb_clear_hash(skb);
 
+	/* timestamp packet in software */
+	skb_tx_timestamp(skb);
+
 	if (!xenvif_rx_queue_tail(queue, skb))
 		goto drop;
 
@@ -460,7 +463,7 @@ static void xenvif_get_strings(struct net_device *dev, u32 stringset, u8 * data)
 
 static const struct ethtool_ops xenvif_ethtool_ops = {
 	.get_link	= ethtool_op_get_link,
-
+	.get_ts_info 	= ethtool_op_get_ts_info,
 	.get_sset_count = xenvif_get_sset_count,
 	.get_ethtool_stats = xenvif_get_ethtool_stats,
 	.get_strings = xenvif_get_strings,
-- 
2.34.1