netdev - [RFC PATCH v3 4/5] Convert netdevsim driver to use ndo_hwtstamp

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Date:   Wed,  5 Apr 2023 00:33:30 -0600
From:   Maxim Georgiev <glipus@...il.com>
To:     kory.maincent@...tlin.com
Cc:     kuba@...nel.org, netdev@...r.kernel.org, glipus@...il.com,
        maxime.chevallier@...tlin.com, vladimir.oltean@....com,
        vadim.fedorenko@...ux.dev, richardcochran@...il.com,
        gerhard@...leder-embedded.com
Subject: [RFC PATCH v3 4/5] Convert netdevsim driver to use ndo_hwtstamp_get/set for hw timestamp requests

Changing netdevsim driver to use the newly introduced ndo_hwtstamp_get/set
callback functions instead of implementing full-blown SIOCGHWTSTAMP/
SIOCSHWTSTAMP IOCTLs handling logic.

Suggested-by: Jakub Kicinski <kuba@...nel.org>
Signed-off-by: Maxim Georgiev <glipus@...il.com>
---
 drivers/net/netdevsim/netdev.c    | 24 ++++++++++++++++++++++++
 drivers/net/netdevsim/netdevsim.h |  1 +
 2 files changed, 25 insertions(+)

diff --git a/drivers/net/netdevsim/netdev.c b/drivers/net/netdevsim/netdev.c
index 35fa1ca98671..6c29dfa3bb4e 100644
--- a/drivers/net/netdevsim/netdev.c
+++ b/drivers/net/netdevsim/netdev.c
@@ -238,6 +238,28 @@ nsim_set_features(struct net_device *dev, netdev_features_t features)
 	return 0;
 }
 
+static int
+nsim_hwtstamp_get(struct net_device *dev,
+		  struct kernel_hwtstamp_config *kernel_config,
+		  struct netlink_ext_ack *extack)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+
+	*kernel_config = ns->hw_tstamp_config;
+	return 0;
+}
+
+static int
+nsim_hwtstamp_set(struct net_device *dev,
+		  struct kernel_hwtstamp_config *kernel_config,
+		  struct netlink_ext_ack *extack)
+{
+	struct netdevsim *ns = netdev_priv(dev);
+
+	ns->hw_tstamp_config = *kernel_config;
+	return 0;
+}
+
 static const struct net_device_ops nsim_netdev_ops = {
 	.ndo_start_xmit		= nsim_start_xmit,
 	.ndo_set_rx_mode	= nsim_set_rx_mode,
@@ -256,6 +278,8 @@ static const struct net_device_ops nsim_netdev_ops = {
 	.ndo_setup_tc		= nsim_setup_tc,
 	.ndo_set_features	= nsim_set_features,
 	.ndo_bpf		= nsim_bpf,
+	.ndo_hwtstamp_get	= nsim_hwtstamp_get,
+	.ndo_hwtstamp_set	= nsim_hwtstamp_set,
 };
 
 static const struct net_device_ops nsim_vf_netdev_ops = {
diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
index 7d8ed8d8df5c..e78e88a0baa1 100644
--- a/drivers/net/netdevsim/netdevsim.h
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -102,6 +102,7 @@ struct netdevsim {
 	} udp_ports;
 
 	struct nsim_ethtool ethtool;
+	struct kernel_hwtstamp_config hw_tstamp_config;
 };
 
 struct netdevsim *
-- 
2.39.2