[PATCH net v3] selftests: net: local_termination: annotate the expected failures

[Jakub Kicinski <kuba@kernel.org>]

Vladimir said when adding this test:

  The bridge driver fares particularly badly [...] mainly because
  it does not implement IFF_UNICAST_FLT.

See commit 90b9566aa5cd ("selftests: forwarding: add a test for
local_termination.sh").

We don't want to hide the known gaps, but having a test which
always fails prevents us from catching regressions. Report
the cases we know may fail as XFAIL.

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
CC: liuhangbin@gmail.com
CC: shuah@kernel.org
CC: linux-kselftest@vger.kernel.org
CC: Petr Machata <petrm@nvidia.com>
CC: vladimir.oltean@nxp.com

v3:
 - use xfail_on_veth correctly as a "prefix" call
 - dropping Vladimir's tags since the code is quite different now
v2: https://lore.kernel.org/r/20240509235553.5740-1-kuba@kernel.org/
 - remove duplicated log_test_xfail
v1: https://lore.kernel.org/all/20240509235553.5740-1-kuba@kernel.org/
---
 .../net/forwarding/local_termination.sh       | 30 +++++++++++--------
 1 file changed, 18 insertions(+), 12 deletions(-)

diff --git a/tools/testing/selftests/net/forwarding/local_termination.sh b/tools/testing/selftests/net/forwarding/local_termination.sh
index c5b0cbc85b3e..4b364cdf3ef0 100755
--- a/tools/testing/selftests/net/forwarding/local_termination.sh
+++ b/tools/testing/selftests/net/forwarding/local_termination.sh
@@ -155,25 +155,30 @@ run_test()
 		"$smac > $MACVLAN_ADDR, ethertype IPv4 (0x0800)" \
 		true
 
-	check_rcv $rcv_if_name "Unicast IPv4 to unknown MAC address" \
-		"$smac > $UNKNOWN_UC_ADDR1, ethertype IPv4 (0x0800)" \
-		false
+	xfail_on_veth $h1 \
+		check_rcv $rcv_if_name "Unicast IPv4 to unknown MAC address" \
+			"$smac > $UNKNOWN_UC_ADDR1, ethertype IPv4 (0x0800)" \
+			false
 
 	check_rcv $rcv_if_name "Unicast IPv4 to unknown MAC address, promisc" \
 		"$smac > $UNKNOWN_UC_ADDR2, ethertype IPv4 (0x0800)" \
 		true
 
-	check_rcv $rcv_if_name "Unicast IPv4 to unknown MAC address, allmulti" \
-		"$smac > $UNKNOWN_UC_ADDR3, ethertype IPv4 (0x0800)" \
-		false
+	xfail_on_veth $h1 \
+		check_rcv $rcv_if_name \
+			"Unicast IPv4 to unknown MAC address, allmulti" \
+			"$smac > $UNKNOWN_UC_ADDR3, ethertype IPv4 (0x0800)" \
+			false
 
 	check_rcv $rcv_if_name "Multicast IPv4 to joined group" \
 		"$smac > $JOINED_MACV4_MC_ADDR, ethertype IPv4 (0x0800)" \
 		true
 
-	check_rcv $rcv_if_name "Multicast IPv4 to unknown group" \
-		"$smac > $UNKNOWN_MACV4_MC_ADDR1, ethertype IPv4 (0x0800)" \
-		false
+	xfail_on_veth $h1 \
+		check_rcv $rcv_if_name \
+			"Multicast IPv4 to unknown group" \
+			"$smac > $UNKNOWN_MACV4_MC_ADDR1, ethertype IPv4 (0x0800)" \
+			false
 
 	check_rcv $rcv_if_name "Multicast IPv4 to unknown group, promisc" \
 		"$smac > $UNKNOWN_MACV4_MC_ADDR2, ethertype IPv4 (0x0800)" \
@@ -187,9 +192,10 @@ run_test()
 		"$smac > $JOINED_MACV6_MC_ADDR, ethertype IPv6 (0x86dd)" \
 		true
 
-	check_rcv $rcv_if_name "Multicast IPv6 to unknown group" \
-		"$smac > $UNKNOWN_MACV6_MC_ADDR1, ethertype IPv6 (0x86dd)" \
-		false
+	xfail_on_veth $h1 \
+		check_rcv $rcv_if_name "Multicast IPv6 to unknown group" \
+			"$smac > $UNKNOWN_MACV6_MC_ADDR1, ethertype IPv6 (0x86dd)" \
+			false
 
 	check_rcv $rcv_if_name "Multicast IPv6 to unknown group, promisc" \
 		"$smac > $UNKNOWN_MACV6_MC_ADDR2, ethertype IPv6 (0x86dd)" \
-- 
2.45.0