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#!/usr/bin/env python3
# SPDX-License-Identifier: LGPL-2.1-only
#
# Test to create a 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'
CGNAME = os.path.join(SLICE, '078cgcreate.scope')
IN_SCOPE_CHILD_CGNAME = os.path.join(CGNAME, 'in_scope_childcg')
OUT_OF_SCOPE_CHILD_CGNAME = '078outofscopechild'
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, CGNAME, create_scope=True)
# get the placeholder PID that libcgroup placed in the scope
try:
pid = int(Cgroup.get(config, None, 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(CGNAME, pid))
except RunError:
result = consts.TEST_FAILED
cause = 'Failed to read pid in {}\'s cgroup.procs'.format(CGNAME)
return result, cause
# Since the scope was created without being made the default, we must specify
# the entire path to operate on a child cgroup below the scope.
Cgroup.create_and_validate(config, None, IN_SCOPE_CHILD_CGNAME)
Cgroup.create_and_validate(config, None, OUT_OF_SCOPE_CHILD_CGNAME)
return result, cause
def teardown(config):
Cgroup.delete(config, None, IN_SCOPE_CHILD_CGNAME)
Cgroup.delete(config, None, OUT_OF_SCOPE_CHILD_CGNAME)
pid = int(Cgroup.get(config, None, 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:
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