ftests: add test to cgcreate of non default controllers

Add test to create cgroups with non default controllers (hugetlb, misc)
using the cgcreate.

-----------------------------------------------------------------
Test Results:
        Run Date:                          Oct 20 05:21:48
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                                           Time (sec)
        ---------------------------------------------------------
        setup                                                0.00
        091-cgcreate-non-default-controllers-v2.py           0.04
        teardown                                             0.00
        ---------------------------------------------------------
        Total Run Time                                       0.04

Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>

diff --git a/tests/ftests/091-cgcreate-non-default-controllers-v2.py b/tests/ftests/091-cgcreate-non-default-controllers-v2.py
new file mode 100755 (executable)
index 0000000..e279e3e
--- /dev/null
+++ b/tests/ftests/091-cgcreate-non-default-controllers-v2.py
@@ -0,0 +1,87 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-only
+#
+# cgcreate non default controller functionality test
+#
+# Copyright (c) 2023 Oracle and/or its affiliates.
+# Author: Kamalesh Babulal <kamalesh.babulal@oracle.com>
+#
+
+from cgroup import Cgroup, Mode
+import consts
+import ftests
+import sys
+import os
+
+CONTROLLERS = ['hugetlb', 'misc']
+
+CGNAME = '090cgcreate'
+CGNAME1 = os.path.join(CGNAME, 'childcg')
+CGNAME2 = os.path.join(CGNAME1, 'grandchildcg')
+
+
+def prereqs(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    if Cgroup.get_cgroup_mode(config) != Mode.CGROUP_MODE_UNIFIED:
+        result = consts.TEST_SKIPPED
+        cause = 'This test requires the unified cgroup v2 hierarchy'
+
+    return result, cause
+
+
+def setup(config):
+    Cgroup.create(config, CONTROLLERS, CGNAME2)
+
+
+def test(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    # checking if the controller is enabled in granchildcg, in turn will
+    # check its parent cgroup childcg's subtree_control file, if it's enabled
+    # in parent cgroup, it's also enabled in the grandparent too.
+    if not Cgroup.is_controller_enabled(config, CGNAME2, CONTROLLERS[0]):
+        result = consts.TEST_FAILED
+        cause = 'Controller {} is not enabled in the child cgroup'.format(CONTROLLERS[0])
+
+    if not Cgroup.is_controller_enabled(config, CGNAME2, CONTROLLERS[1]):
+        result = consts.TEST_FAILED
+        tmp_cause = 'Controller {} is not enabled in the child cgroup'.format(CONTROLLERS[1])
+        cause = '\n'.join(filter(None, [cause, tmp_cause]))
+
+    # for the grandchildcg read it cgroup.subtree_control, is_controller_enabled
+    # will check its parent cgroup childcg's subtree_control
+    if Cgroup.get(config, None, CGNAME2, setting='cgroup.subtree_control',
+                  print_headers=False, values_only=True):
+        result = consts.TEST_FAILED
+        tmp_cause = 'Controller {} enabled in grandchild cgroup'.format(CONTROLLERS[0])
+        cause = '\n'.join(filter(None, [cause, tmp_cause]))
+
+    return result, cause
+
+
+def teardown(config):
+    Cgroup.delete(config, CONTROLLERS, CGNAME, recursive=True)
+
+
+def main(config):
+    [result, cause] = prereqs(config)
+    if result != consts.TEST_PASSED:
+        return [result, cause]
+
+    setup(config)
+    [result, cause] = test(config)
+    teardown(config)
+
+    return [result, cause]
+
+
+if __name__ == '__main__':
+    config = ftests.parse_args()
+    # this test was invoked directly.  run only it
+    config.args.num = int(os.path.basename(__file__).split('-')[0])
+    sys.exit(ftests.main(config))
+
+# vim: set et ts=4 sw=4: