linux-kernel - [PATCH net-next v3] net: openvswitch: Check vport net device name

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Message-Id: <20240417042031.157008-1-jun.gu@easystack.cn>
Date: Wed, 17 Apr 2024 12:20:31 +0800
From: "jun.gu" <jun.gu@...ystack.cn>
To: echaudro@...hat.com
Cc: dev@...nvswitch.org,
	jun.gu@...ystack.cn,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: [PATCH net-next v3] net: openvswitch: Check vport net device name

Check vport net device name to ensure the provided name is not one of
its aliases. This can avoid that ovs userspace create and destroy vport
repeatedly.

Signed-off-by: Jun Gu <jun.gu@...ystack.cn>
---
 net/openvswitch/vport-netdev.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/net/openvswitch/vport-netdev.c b/net/openvswitch/vport-netdev.c
index 903537a5da22..7003e76b8172 100644
--- a/net/openvswitch/vport-netdev.c
+++ b/net/openvswitch/vport-netdev.c
@@ -78,7 +78,10 @@ struct vport *ovs_netdev_link(struct vport *vport, const char *name)
 	int err;
 
 	vport->dev = dev_get_by_name(ovs_dp_get_net(vport->dp), name);
-	if (!vport->dev) {
+	/* Ensure that the device exists and that the provided
+	 * name is not one of its aliases.
+	 */
+	if ((!vport->dev) || strcmp(name, ovs_vport_name(vport))) {
 		err = -ENODEV;
 		goto error_free_vport;
 	}
-- 
2.25.1