6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Alexander Sverdlin alexander.sverdlin@siemens.com
[ Upstream commit 57531b3416448d1ced36a2a974a4085ec43d57b0 ]
It seems that most of the tests prepare the interfaces once before the test run (setup_prepare()), rely on setup_wait() to wait for link and only then run the test(s).
local_termination brings the physical interfaces down and up during test run but never wait for them to come up. If the auto-negotiation takes some seconds, first test packets are being lost, which leads to false-negative test results.
Use setup_wait() in run_test() to make sure auto-negotiation has been completed after all simple_if_init() calls on physical interfaces and test packets will not be lost because of the race against link establishment.
Fixes: 90b9566aa5cd3f ("selftests: forwarding: add a test for local_termination.sh") Reviewed-by: Vladimir Oltean vladimir.oltean@nxp.com Signed-off-by: Alexander Sverdlin alexander.sverdlin@siemens.com Link: https://patch.msgid.link/20251106161213.459501-1-alexander.sverdlin@siemens.... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- tools/testing/selftests/net/forwarding/local_termination.sh | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/tools/testing/selftests/net/forwarding/local_termination.sh b/tools/testing/selftests/net/forwarding/local_termination.sh index 9b5a63519b949..6cde61f10fd0e 100755 --- a/tools/testing/selftests/net/forwarding/local_termination.sh +++ b/tools/testing/selftests/net/forwarding/local_termination.sh @@ -108,6 +108,8 @@ run_test() local smac=$(mac_get $h1) local rcv_dmac=$(mac_get $rcv_if_name)
+ setup_wait + tcpdump_start $rcv_if_name
mc_route_prepare $h1