[PATCH 6.4 110/206] selftests: forwarding: Add a helper to skip test when using veth pairs

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From: Ido Schimmel <idosch@xxxxxxxxxx>

commit 66e131861ab7bf754b50813216f5c6885cd32d63 upstream.

A handful of tests require physical loopbacks to be used instead of veth
pairs. Add a helper that these tests will invoke in order to be skipped
when executed with veth pairs.

Fixes: 64916b57c0b1 ("selftests: forwarding: Add speed and auto-negotiation test")
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxx>
Reviewed-by: Petr Machata <petrm@xxxxxxxxxx>
Tested-by: Mirsad Todorovac <mirsad.todorovac@xxxxxxxxxxxx>
Reviewed-by: Hangbin Liu <liuhangbin@xxxxxxxxx>
Acked-by: Nikolay Aleksandrov <razor@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230808141503.4060661-7-idosch@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 tools/testing/selftests/net/forwarding/lib.sh |   11 +++++++++++
 1 file changed, 11 insertions(+)

--- a/tools/testing/selftests/net/forwarding/lib.sh
+++ b/tools/testing/selftests/net/forwarding/lib.sh
@@ -164,6 +164,17 @@ check_port_mab_support()
 	fi
 }
 
+skip_on_veth()
+{
+	local kind=$(ip -j -d link show dev ${NETIFS[p1]} |
+		jq -r '.[].linkinfo.info_kind')
+
+	if [[ $kind == veth ]]; then
+		echo "SKIP: Test cannot be run with veth pairs"
+		exit $ksft_skip
+	fi
+}
+
 if [[ "$(id -u)" -ne 0 ]]; then
 	echo "SKIP: need root privileges"
 	exit $ksft_skip





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