[PATCH net v2 03/17] selftests: forwarding: bridge_mdb: Check iproute2 version

[Ido Schimmel <idosch@nvidia.com>]

The selftest relies on iproute2 changes present in version 6.3, but the
test does not check for it, resulting in error:

 # ./bridge_mdb.sh

 INFO: # Host entries configuration tests
 TEST: Common host entries configuration tests (IPv4)                [FAIL]
         Managed to add IPv4 host entry with a filter mode
 TEST: Common host entries configuration tests (IPv6)                [FAIL]
         Managed to add IPv6 host entry with a filter mode
 TEST: Common host entries configuration tests (L2)                  [FAIL]
         Managed to add L2 host entry with a filter mode

 INFO: # Port group entries configuration tests - (*, G)
 Command "replace" is unknown, try "bridge mdb help".
 [...]

Fix by skipping the test if iproute2 is too old.

Fixes: b6d00da08610 ("selftests: forwarding: Add bridge MDB test")
Reported-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
Closes: https://lore.kernel.org/netdev/6b04b2ba-2372-6f6b-3ac8-b7cba1cfae83@alu.unizg.hr/
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Reviewed-by: Petr Machata <petrm@nvidia.com>
Tested-by: Mirsad Todorovac <mirsad.todorovac@alu.unizg.hr>
---
 tools/testing/selftests/net/forwarding/bridge_mdb.sh | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/testing/selftests/net/forwarding/bridge_mdb.sh b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
index ae3f9462a2b6..6f830b5f03c9 100755
--- a/tools/testing/selftests/net/forwarding/bridge_mdb.sh
+++ b/tools/testing/selftests/net/forwarding/bridge_mdb.sh
@@ -1206,6 +1206,11 @@ ctrl_test()
 	ctrl_mldv2_is_in_test
 }
 
+if ! bridge mdb help 2>&1 | grep -q "replace"; then
+	echo "SKIP: iproute2 too old, missing bridge mdb replace support"
+	exit $ksft_skip
+fi
+
 trap cleanup EXIT
 
 setup_prepare
-- 
2.40.1