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

Add a test to create a systemd scope via the cgcreate command
line tool.  The scope is set as the default and used to create
a child cgroup.

-----------------------------------------------------------------
Test Results:
        Run Date:                          Apr 10 21:39:10
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
        Test                                          Time (sec)
        --------------------------------------------------------
        setup                                               0.00
        079-sudo-cgcreate_default_systemd_scope.py          5.06
        teardown                                            0.00
        --------------------------------------------------------
        Total Run Time                                      5.06

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
Reviewed-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>
(cherry picked from commit 8e29c7282c956bfb75847f6d46f55668be786817)

diff --git a/tests/ftests/079-sudo-cgcreate_default_systemd_scope.py b/tests/ftests/079-sudo-cgcreate_default_systemd_scope.py
new file mode 100755 (executable)
index 0000000..c42d371
--- /dev/null
+++ b/tests/ftests/079-sudo-cgcreate_default_systemd_scope.py
@@ -0,0 +1,104 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-only
+#
+# Test to create a default systemd scope using cgcreate
+#
+# Copyright (c) 2023 Oracle and/or its affiliates.
+# Author: Tom Hromatka <tom.hromatka@oracle.com>
+#
+
+from cgroup import Cgroup
+from process import Process
+from libcgroup import Mode
+from run import RunError
+from log import Log
+import consts
+import ftests
+import sys
+import os
+
+CONTROLLERS = ['cpu', 'pids']
+SLICE = 'libcgroup.slice'
+SCOPE_CGNAME = os.path.join(SLICE, '079cgcreate.scope')
+CHILD_CGNAME = 'childcg'
+
+
+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
+
+    Cgroup.create_and_validate(config, CONTROLLERS, SCOPE_CGNAME, create_scope=True,
+                               set_default_scope=True)
+
+    # get the placeholder PID that libcgroup placed in the scope
+    try:
+        pid = int(Cgroup.get(config, None, SCOPE_CGNAME, setting='cgroup.procs',
+                             print_headers=False, values_only=True, ignore_systemd=True))
+        # use the pid variable so that lint is happy
+        Log.log_debug('Cgroup {} has pid {}'.format(SCOPE_CGNAME, pid))
+    except RunError:
+        result = consts.TEST_FAILED
+        cause = 'Failed to read pid in {}\'s cgroup.procs'.format(SCOPE_CGNAME)
+        return result, cause
+
+    Cgroup.create_and_validate(config, None, CHILD_CGNAME)
+
+    return result, cause
+
+
+def teardown(config):
+    Cgroup.delete(config, None, CHILD_CGNAME)
+
+    pid = int(Cgroup.get(config, None, SCOPE_CGNAME, setting='cgroup.procs',
+                         print_headers=False, values_only=True, ignore_systemd=True))
+    Process.kill(config, pid)
+
+    # systemd will automatically remove the cgroup once there are no more pids in
+    # the cgroup, so we don't need to delete CGNAME.  But let's try to remove the
+    # slice
+    try:
+        Cgroup.delete(config, CONTROLLERS, SLICE)
+    except RunError:
+        pass
+
+
+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:

diff --git a/tests/ftests/Makefile.am b/tests/ftests/Makefile.am
index a5132ff389aa10fbe8911be4a26f3e0f87638733..744a5bab2cd86ceeb39a846a05274cb8aa314d01 100644 (file)
--- a/tests/ftests/Makefile.am
+++ b/tests/ftests/Makefile.am
@@ -99,6 +99,7 @@ EXTRA_DIST_PYTHON_TESTS = \
                          076-cgconfig-auto_convert.py \
                          077-pybindings-cgroup_get_procs.py \
                          078-sudo-cgcreate_systemd_scope.py \
+                         079-sudo-cgcreate_default_systemd_scope.py \
                          998-cgdelete-non-existing-shared-mnt-cgroup-v1.py
 # Intentionally omit the stress test from the extra dist
 # 999-stress-cgroup_init.py