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#!/usr/bin/env python3
# SPDX-License-Identifier: LGPL-2.1-only
#
# Test to exercise that libcgroup properly handles cgroups that are marked as "domain invalid"
#
# Copyright (c) 2023 Oracle and/or its affiliates
# Author: Tom Hromatka <tom.hromatka@oracle.com>
#
from cgroup import Cgroup as Cgroup, Mode
from process import Process
from run import RunError
import consts
import ftests
import sys
import os
CONTROLLER = 'cpu'
PARENTCG = '080domaininvalid'
CHILDCG = os.path.join(PARENTCG, 'childcg')
GRANDCHILDCG = os.path.join(CHILDCG, '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, CONTROLLER, PARENTCG)
Cgroup.create(config, CONTROLLER, CHILDCG)
config.process.create_process_in_cgroup(config, CONTROLLER, PARENTCG, ignore_systemd=True)
def test(config):
#
# test 1 - ensure that we can create and delete a cgroup (with no controllers) under a
# parent whose type is 'domain invalid'
#
Cgroup.create_and_validate(config, None, GRANDCHILDCG)
Cgroup.delete(config, None, GRANDCHILDCG)
#
# test 2 - attempt to add a process to the child cgroup. the kernel should not allow this,
# and libcgroup needs to handle this
#
pid = config.process.create_process(config)
try:
Cgroup.classify(config, CONTROLLER, CHILDCG, pid)
except RunError as re:
if 'Operation not supported' not in re.stderr:
raise re
finally:
Process.kill(config, pid)
#
# test 3 - attempt to enable a controller that enforces the no-processes-in-non-leaf-nodes
# rule. the kernel should not allow this
#
try:
Cgroup.subtree_control(config, CHILDCG, 'memory')
except RunError as re:
if 'No such file or directory' not in re.stderr:
raise re
return consts.TEST_PASSED, None
def teardown(config):
pids = Cgroup.get_pids_in_cgroup(config, PARENTCG, CONTROLLER)
Process.kill(config, pids)
Cgroup.delete(config, CONTROLLER, CHILDCG)
Cgroup.delete(config, CONTROLLER, PARENTCG)
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:
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