linux-kernel - [PATCH net-next] net: uevent: also pass network device driver

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Message-ID: <20241115183346.597503-1-mail@tk154.de>
Date: Fri, 15 Nov 2024 19:33:46 +0100
From: Til Kaiser <mail@...54.de>
To: netdev@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
	Til Kaiser <mail@...54.de>
Subject: [PATCH net-next] net: uevent: also pass network device driver

Currently, for uevent, the interface name and
index are passed via shell variables.

This commit also passes the network device
driver as a shell variable to uevent.

Signed-off-by: Til Kaiser <mail@...54.de>
---
 net/core/net-sysfs.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/net/core/net-sysfs.c b/net/core/net-sysfs.c
index 05cf5347f25e..67aad5ca82f8 100644
--- a/net/core/net-sysfs.c
+++ b/net/core/net-sysfs.c
@@ -2000,6 +2000,7 @@ EXPORT_SYMBOL_GPL(net_ns_type_operations);
 static int netdev_uevent(const struct device *d, struct kobj_uevent_env *env)
 {
 	const struct net_device *dev = to_net_dev(d);
+	const char *driver = netdev_drivername(dev);
 	int retval;
 
 	/* pass interface to uevent. */
@@ -2012,6 +2013,12 @@ static int netdev_uevent(const struct device *d, struct kobj_uevent_env *env)
 	 * and is what RtNetlink uses natively.
 	 */
 	retval = add_uevent_var(env, "IFINDEX=%d", dev->ifindex);
+	if (retval)
+		goto exit;
+
+	if (driver[0])
+		/* pass driver to uevent. */
+		retval = add_uevent_var(env, "DRIVER=%s", driver);
 
 exit:
 	return retval;
-- 
2.47.0