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Subject[PATCH net 07/17] selftests: mptcp: join: skip Fastclose tests if not supported
Selftests are supposed to run on any kernels, including the old ones not
supporting all MPTCP features.

One of them is the support of MP_FASTCLOSE introduced in commit
f284c0c77321 ("mptcp: implement fastclose xmit path").

If the MIB counter is not available, the test cannot be verified and the
behaviour will not be the expected one. So we can skip the test if the
counter is missing.

Link: https://github.com/multipath-tcp/mptcp_net-next/issues/368
Fixes: 01542c9bf9ab ("selftests: mptcp: add fastclose testcase")
Cc: stable@vger.kernel.org
Signed-off-by: Matthieu Baerts <matthieu.baerts@tessares.net>
---
tools/testing/selftests/net/mptcp/mptcp_join.sh | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 3da39febb09e..cfd43037c6d5 100755
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -261,6 +261,19 @@ reset()
return 0
}

+# $1: test name ; $2: counter to check
+reset_check_counter()
+{
+ reset "${1}" || return 1
+
+ local counter="${2}"
+
+ if ! nstat -asz "${counter}" | grep -wq "${counter}"; then
+ mark_as_skipped "counter '${counter}' is not available"
+ return 1
+ fi
+}
+
# $1: test name
reset_with_cookies()
{
@@ -3121,14 +3134,14 @@ fullmesh_tests()

fastclose_tests()
{
- if reset "fastclose test"; then
+ if reset_check_counter "fastclose test" "MPTcpExtMPFastcloseTx"; then
run_tests $ns1 $ns2 10.0.1.1 1024 0 fastclose_client
chk_join_nr 0 0 0
chk_fclose_nr 1 1
chk_rst_nr 1 1 invert
fi

- if reset "fastclose server test"; then
+ if reset_check_counter "fastclose server test" "MPTcpExtMPFastcloseRx"; then
run_tests $ns1 $ns2 10.0.1.1 1024 0 fastclose_server
chk_join_nr 0 0 0
chk_fclose_nr 1 1 invert
--
2.40.1

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