[PATCH net-next v2 7/8] selftests: tls: skip the zero_len tests when TLS is unavailable

[Chuck Lever <cel@kernel.org>]

FIXTURE_SETUP(zero_len) returns early when ulp_sock_pair() reports
that the TCP_ULP setsockopt failed, so on a kernel built without
CONFIG_TLS the TLS_RX setsockopt never runs. TEST_F(zero_len, test)
then sends its raw records over a plain TCP socket, which returns
the ciphertext verbatim. All eight variants FAIL on a machine that
merely lacks TLS, and those failures mask any real regression in
the same run.

Skip the test when the fixture recorded notls, as the other
fixtures in this file do.

Fixes: a61a3e961baf ("selftests: tls: add tests for zero-length records")
Signed-off-by: Chuck Lever <cel@kernel.org>
---
 tools/testing/selftests/net/tls.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/testing/selftests/net/tls.c b/tools/testing/selftests/net/tls.c
index 419c6cc0cc5e..e6876b8caac8 100644
--- a/tools/testing/selftests/net/tls.c
+++ b/tools/testing/selftests/net/tls.c
@@ -2663,6 +2663,9 @@ TEST_F(zero_len, test)
 	int rec_off;
 	int i;
 
+	if (self->notls)
+		SKIP(return, "no TLS support");
+
 	zero_len_send_recs(_metadata, self->fd, variant->recs);
 
 	rec = &variant->recs[0];

-- 
2.55.0