[PATCH nft 2/3] tests/shell: skip "vlan_8021ad_tag" test instead of failing

[Thomas Haller <thaller@redhat.com>]

The test "vlan_8021ad_tag" requires recent kernel patches to pass. This
makes the test suite unusable to contributors, who don't also run the
required kernel.

Instead of failing, just skip the test.

If you run with a kernel that is supposed to pass all tests, consider
setting NFT_TEST_FAIL_ON_SKIP=y.

Fixes: 74cf3d16d8e9 ('tests: shell: add vlan match test case')
Signed-off-by: Thomas Haller <thaller@redhat.com>
---
 tests/shell/testcases/packetpath/vlan_8021ad_tag | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/tests/shell/testcases/packetpath/vlan_8021ad_tag b/tests/shell/testcases/packetpath/vlan_8021ad_tag
index 379a5710c1cb..246427062323 100755
--- a/tests/shell/testcases/packetpath/vlan_8021ad_tag
+++ b/tests/shell/testcases/packetpath/vlan_8021ad_tag
@@ -47,4 +47,9 @@ EOF
 ip netns exec "$ns1" ping -c 1 10.1.1.2
 
 ip netns exec "$ns2" $NFT list ruleset
-ip netns exec "$ns2" $NFT list chain netdev t c | grep 'counter packets 1 bytes 84'
+OUT="$(ip netns exec "$ns2" $NFT list chain netdev t c)"
+
+if ! printf "%s" "$OUT" | grep -q 'counter packets 1 bytes 84' ; then
+	echo "Filter did not match. Assume kernel lacks fix https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=af84f9e447a65b4b9f79e7e5d69e19039b431c56"
+	exit 77
+fi
-- 
2.41.0