selftests: netfilter: fix conntrack_dump_flush retval on unsupported kernel

With CONFIG_NETFILTER=n test passes instead of skip.  Before:

 ./run_kselftest.sh -t net/netfilter:conntrack_dump_flush
[..]
 # Starting 3 tests from 1 test cases.
 #  RUN           conntrack_dump_flush.test_dump_by_zone ...
 mnl_socket_open: Protocol not supported
[..]
 ok 3 conntrack_dump_flush.test_flush_by_zone_default
 # PASSED: 3 / 3 tests passed.
 # Totals: pass:3 fail:0 xfail:0 xpass:0 skip:0 error:0

After:
  mnl_socket_open: Protocol not supported
[..]
  ok 3 conntrack_dump_flush.test_flush_by_zone_default # SKIP cannot open netlink_netfilter socket
  # PASSED: 3 / 3 tests passed.
  # Totals: pass:0 fail:0 xfail:0 xpass:0 skip:3 error:0

Signed-off-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20240422103358.3511-1-fw@strlen.de
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c
index ca8d6b9..bd9317b 100644 (file)
--- a/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c
+++ b/tools/testing/selftests/net/netfilter/conntrack_dump_flush.c
@@ -313,13 +313,11 @@ FIXTURE_SETUP(conntrack_dump_flush)
        self->sock = mnl_socket_open(NETLINK_NETFILTER);
        if (!self->sock) {
                perror("mnl_socket_open");
-               exit(EXIT_FAILURE);
+               SKIP(return, "cannot open netlink_netfilter socket");
        }
 
-       if (mnl_socket_bind(self->sock, 0, MNL_SOCKET_AUTOPID) < 0) {
-               perror("mnl_socket_bind");
-               exit(EXIT_FAILURE);
-       }
+       ret = mnl_socket_bind(self->sock, 0, MNL_SOCKET_AUTOPID);
+       EXPECT_EQ(ret, 0);
 
        ret = conntracK_count_zone(self->sock, TEST_ZONE_ID);
        if (ret < 0 && errno == EPERM)