selftests: mptcp: add MPC backup tests

Add a couple of test-cases covering the newly introduced
features - priority update for the MPC subflow.

Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

diff --git a/tools/testing/selftests/net/mptcp/mptcp_join.sh b/tools/testing/selftests/net/mptcp/mptcp_join.sh
index 55efe2a..ff83ef4 100755 (executable)
--- a/tools/testing/selftests/net/mptcp/mptcp_join.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_join.sh
@@ -2428,6 +2428,36 @@ backup_tests()
                chk_add_nr 1 1
                chk_prio_nr 1 1
        fi
+
+       if reset "mpc backup"; then
+               pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
+               run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
+               chk_join_nr 0 0 0
+               chk_prio_nr 0 1
+       fi
+
+       if reset "mpc backup both sides"; then
+               pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow,backup
+               pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow,backup
+               run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow
+               chk_join_nr 0 0 0
+               chk_prio_nr 1 1
+       fi
+
+       if reset "mpc switch to backup"; then
+               pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
+               run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
+               chk_join_nr 0 0 0
+               chk_prio_nr 0 1
+       fi
+
+       if reset "mpc switch to backup both sides"; then
+               pm_nl_add_endpoint $ns1 10.0.1.1 flags subflow
+               pm_nl_add_endpoint $ns2 10.0.1.2 flags subflow
+               run_tests $ns1 $ns2 10.0.1.1 0 0 0 slow backup
+               chk_join_nr 0 0 0
+               chk_prio_nr 1 1
+       fi
 }
 
 add_addr_ports_tests()