From e7cb2f638f7e4f5f95ca7956566de70e5e915ba3 Mon Sep 17 00:00:00 2001
From: Hannes Laimer <h.laimer@proxmox.com>
Date: Fri, 23 Oct 2026 13:14:28 +0200
Subject: [PATCH] selftests: forwarding: vxlan_reserved: add gbp changelink
 test

On a device created with gbp, run the reserved bit probes before and
after an unrelated changelink. Check that what the device accepts has
not changed.

Signed-off-by: Hannes Laimer <h.laimer@proxmox.com>
Reviewed-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Link: https://patch.msgid.link/20261023-b4-vxlan-changelink-gbp-v1-2-f0d13951c09b@proxmox.com
Tested-by: Gabriel Goller <g.goller@proxmox.com>
Reviewed-by: Gabriel Goller <g.goller@proxmox.com>
Reviewed-by: Hangbin Liu <liuhangbin@kylinos.cn>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
---
 .../selftests/net/forwarding/vxlan_reserved.sh    | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/vxlan_reserved.sh b/tools/testing/selftests/net/forwarding/vxlan_reserved.sh
index 709845123727..0ce264cc57f8 100755
--- a/tools/testing/selftests/net/forwarding/vxlan_reserved.sh
+++ b/tools/testing/selftests/net/forwarding/vxlan_reserved.sh
@@ -40,6 +40,7 @@
 	reserved_31_test
 	reserved_56_test
 	reserved_63_test
+	gbp_changelink_test
     "}
 
 NUM_NETIFS=4
@@ -338,6 +339,20 @@ reserved_63_test()
 	    reserved_test 63
 }
 
+gbp_changelink_test_do()
+{
+	vxlan_device_add gbp
+	__default_test_do 25 "gbp"
+	ip link set dev vx1 type vxlan ageing 300
+	__default_test_do 25 "gbp after changelink"
+}
+
+gbp_changelink_test()
+{
+	in_defer_scope \
+	    gbp_changelink_test_do
+}
+
 trap cleanup EXIT
 
 setup_prepare