Selftests are supposed to run on any kernels, including the old ones not
supporting all MPTCP features.
One of them is the support of TCP_FASTOPEN socket option with MPTCP
connections introduced by commit 4ffb0a02346c ("mptcp: add TCP_FASTOPEN
sock option").
It is possible to look for "mptcp_fastopen_" in kallsyms to know if the
feature is supported or not.
Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: ca7ae8916043 ("selftests: mptcp: mptfo Initiator/Listener")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
---
tools/testing/selftests/net/mptcp/mptcp_connect.sh | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index 895114fb6832..773dd770a567 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -777,6 +777,11 @@ run_tests_peekmode()
run_tests_mptfo()
{
+ if ! mptcp_lib_kallsyms_has "mptcp_fastopen_"; then
+ echo "INFO: TFO not supported by the kernel: SKIP"
+ return
+ fi
+
echo "INFO: with MPTFO start"
ip netns exec "$ns1" sysctl -q net.ipv4.tcp_fastopen=2
ip netns exec "$ns2" sysctl -q net.ipv4.tcp_fastopen=1
--
2.40.1
