ftests: Add a test to stress create systemd scope via cgcreate

Add a test to stress creation of systemd scope via the cgcreate command
line tool, by passing invalid slice and scope names.

-----------------------------------------------------------------
Test Results:
        Run Date:                          Aug 23 11:03:00
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                                   Time (sec)
        -------------------------------------------------
        setup                                        0.00
        997-sudo-cgcreate_systemd_scope.py           0.13
        teardown                                     0.00
        -------------------------------------------------
        Total Run Time                               0.13

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

diff --git a/tests/ftests/997-sudo-cgcreate_systemd_scope.py b/tests/ftests/997-sudo-cgcreate_systemd_scope.py
new file mode 100755 (executable)
index 0000000..f734f8f
--- /dev/null
+++ b/tests/ftests/997-sudo-cgcreate_systemd_scope.py
@@ -0,0 +1,127 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-only
+#
+# Stress test to create a systemd scope using cgcreate by
+# passing invalid systemd slice and scope names
+#
+# Copyright (c) 2023 Oracle and/or its affiliates.
+# Author: Kamalesh Babulal <kamalesh.babulal@oracle.com>
+#
+
+from cgroup import Cgroup
+from process import Process
+from libcgroup import Mode
+from run import RunError
+import consts
+import ftests
+import sys
+import os
+
+CONTROLLERS = ['cpu', 'pids']
+SLICE = 'libcgroup.slice'
+SCOPE = '997cgstress.scope'
+INVAL_SLICE_NAMES = ['997', '997.slic1', '997.slice1', '.slice']
+INVAL_SCOPE_NAMES = ['997', '997.scop1', '997.scope1', '.scope', 'cpu.scope']
+
+
+def prereqs(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    if config.args.container:
+        result = consts.TEST_SKIPPED
+        cause = 'This test cannot be run within a container'
+        return result, cause
+
+    if Cgroup.get_cgroup_mode(config) != Mode.CGROUP_MODE_UNIFIED:
+        result = consts.TEST_SKIPPED
+        cause = 'This test requires the unified cgroup hierarchy'
+
+    return result, cause
+
+
+def setup(config):
+    pass
+
+
+def test(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    for slice_name in INVAL_SLICE_NAMES:
+        CGNAME = os.path.join(slice_name, SCOPE)
+
+        try:
+            Cgroup.create_and_validate(config, CONTROLLERS, CGNAME, create_scope=True)
+        except RunError as re:
+            if 'Invalid unit name' not in str(re.stdout):
+                raise re
+        else:
+            result = consts.TEST_FAILED
+            tmp_cause = 'Erroneously succeeded in creating slice {}', format(CGNAME)
+            cause = '\n'.join(filter(None, [cause, tmp_cause]))
+
+    for scope_name in INVAL_SCOPE_NAMES:
+        CGNAME = os.path.join(SLICE, scope_name)
+
+        try:
+            Cgroup.create_and_validate(config, CONTROLLERS, CGNAME, create_scope=True)
+        except RunError as re:
+            if (
+                    'Invalid unit name' not in str(re.stdout) and
+                    'Invalid scope name, using controller name' not in str(re.stdout)
+               ):
+                raise re
+        else:
+            result = consts.TEST_FAILED
+            tmp_cause = 'Erroneously succeeded in creating scope {}', format(CGNAME)
+            cause = '\n'.join(filter(None, [cause, tmp_cause]))
+
+    return result, cause
+
+
+def teardown(config):
+    # try deleting INVAL_[SLICE, SCOPE] CGNAME for the cases, where it was erroneously created.
+    for slice_name in INVAL_SLICE_NAMES:
+        CGNAME = os.path.join(slice_name, SCOPE)
+
+        try:
+            pid = int(Cgroup.get(config, None, CGNAME, setting='cgroup.procs',
+                      print_headers=False, values_only=True, ignore_systemd=True))
+            print(pid)
+            Process.kill(config, pid)
+        except RunError:
+            pass
+
+    for scope_name in INVAL_SCOPE_NAMES:
+        CGNAME = os.path.join(SLICE, scope_name)
+
+        try:
+            pid = int(Cgroup.get(config, None, CGNAME, setting='cgroup.procs',
+                      print_headers=False, values_only=True, ignore_systemd=True))
+            Process.kill(config, pid)
+        except RunError:
+            pass
+
+
+def main(config):
+    [result, cause] = prereqs(config)
+    if result != consts.TEST_PASSED:
+        return [result, cause]
+
+    setup(config)
+
+    [result, cause] = test(config)
+    if result != consts.TEST_PASSED:
+        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: