[PATCH 5.10.y] selftests: mptcp: simult flows: skip if MPTCP is not supported

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commit 9161f21c74a1a0e7bb39eb84ea0c86b23c92fc87 upstream.

  Backport note: a simple conflict with 787eb1e4df93 ("selftests: mptcp:
  uniform 'rndh' variable") where a new line was added for something
  else in the same context.

Selftests are supposed to run on any kernels, including the old ones not
supporting MPTCP.

A new check is then added to make sure MPTCP is supported. If not, the
test stops and is marked as "skipped".

Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: 1a418cb8e888 ("mptcp: simult flow self-tests")
Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
Signed-off-by: Matthieu Baerts <matthieu.baerts@xxxxxxxxxxxx>
---
 tools/testing/selftests/net/mptcp/simult_flows.sh | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/testing/selftests/net/mptcp/simult_flows.sh b/tools/testing/selftests/net/mptcp/simult_flows.sh
index 8fcb28927818..b51afba244be 100755
--- a/tools/testing/selftests/net/mptcp/simult_flows.sh
+++ b/tools/testing/selftests/net/mptcp/simult_flows.sh
@@ -1,6 +1,8 @@
 #!/bin/bash
 # SPDX-License-Identifier: GPL-2.0
 
+. "$(dirname "${0}")/mptcp_lib.sh"
+
 rndh=$(printf %x $sec)-$(mktemp -u XXXXXX)
 ns1="ns1-$rndh"
 ns2="ns2-$rndh"
@@ -31,6 +33,8 @@ cleanup()
 	done
 }
 
+mptcp_lib_check_mptcp
+
 ip -Version > /dev/null 2>&1
 if [ $? -ne 0 ];then
 	echo "SKIP: Could not run test without ip tool"
-- 
2.39.2




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