net/forwarding: requirements and problematic cases

Author: pvts-mat

kselftests/net/forwarding/README.rst

@@ -0,0 +1,22 @@
+Requirements
+============
+
+#. The tests require ``jq`` and ``mausezahn`` tools to run (packages
+   ``jq`` and ``netsniff-ng`` on RHEL)
+
+#. The file ``tools/testing/selftests/net/forwarding/forwarding.config``
+   must be created in kernel's source dir for the tests not to crash.
+   The
+   ``tools/testing/selftests/net/forwarding/forwarding.config.sample``
+   is provided in the repo as a prototype to start with. No need to
+   deviate from it though to have a working configuration - just copying
+   ``forwarding.config.sample`` to ``forwarding.config`` should be
+   enough to have functional ``net/forwarding`` tests collection.
+
+Problems
+========
+
+The tests ``sch_ets.sh``, ``sch_red.sh``, ``sch_tbf_ets.sh``,
+``sch_tbf_prio.sh``, ``sch_tbf_root.sh`` can hang the machine for more
+than 10 minutes. Whether it's expected or dyfunctional was not
+established yet. In either case this hinders efficient testing.