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[net,4/4] selftests: mptcp: userspace pm: uniform verify events

Message ID 20230411-upstream-net-20230411-mptcp-fixes-v1-4-ca540f3ef986@tessares.net
State Accepted
Commit 711ae788cbbb82818531b55e32b09518ee09a11a
Headers show
Series mptcp: more fixes for 6.3 | expand

Commit Message

Matthieu Baerts April 11, 2023, 8:42 p.m. UTC
Simply adding a "sleep" before checking something is usually not a good
idea because the time that has been picked can not be enough or too
much. The best is to wait for events with a timeout.

In this selftest, 'sleep 0.5' is used more than 40 times. It is always
used before calling a 'verify_*' function except for this
verify_listener_events which has been added later.

At the end, using all these 'sleep 0.5' seems to work: the slow CIs
don't complain so far. Also because it doesn't take too much time, we
can just add two more 'sleep 0.5' to uniform what is done before calling
a 'verify_*' function. For the same reasons, we can also delay a bigger
refactoring to replace all these 'sleep 0.5' by functions waiting for
events instead of waiting for a fix time and hope for the best.

Fixes: 6c73008aa301 ("selftests: mptcp: listener test for userspace PM")
Cc: stable@vger.kernel.org
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
---
 tools/testing/selftests/net/mptcp/userspace_pm.sh | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/tools/testing/selftests/net/mptcp/userspace_pm.sh b/tools/testing/selftests/net/mptcp/userspace_pm.sh
index 48e52f995a98..b1eb7bce599d 100755
--- a/tools/testing/selftests/net/mptcp/userspace_pm.sh
+++ b/tools/testing/selftests/net/mptcp/userspace_pm.sh
@@ -913,6 +913,7 @@  test_listener()
 		$client4_port > /dev/null 2>&1 &
 	local listener_pid=$!
 
+	sleep 0.5
 	verify_listener_events $client_evts $LISTENER_CREATED $AF_INET 10.0.2.2 $client4_port
 
 	# ADD_ADDR from client to server machine reusing the subflow port
@@ -928,6 +929,7 @@  test_listener()
 	# Delete the listener from the client ns, if one was created
 	kill_wait $listener_pid
 
+	sleep 0.5
 	verify_listener_events $client_evts $LISTENER_CLOSED $AF_INET 10.0.2.2 $client4_port
 }