ftests: Add a cgxget/cgxset test for the cpuset controller

Add a functional test that exercises the cpuset v1/v2 mappings.

-----------------------------------------------------------------
Test Results:
        Run Date:                          Sep 08 11:17:19
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                                    Time (sec)
        ---------------------------------------------------------
        setup                                         0.00
        038-cgxget-cpuset_settings.py                 1.34
        teardown                                      0.00
        ---------------------------------------------------------
        Total Run Time                                1.34

Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>

diff --git a/ftests/038-cgxget-cpuset_settings.py b/ftests/038-cgxget-cpuset_settings.py
new file mode 100755 (executable)
index 0000000..ebed88e
--- /dev/null
+++ b/ftests/038-cgxget-cpuset_settings.py
@@ -0,0 +1,116 @@
+#!/usr/bin/env python3
+#
+# cgxget functionality test - various cpuset settings
+#
+# Copyright (c) 2021-2022 Oracle and/or its affiliates.
+# Author: Tom Hromatka <tom.hromatka@oracle.com>
+#
+
+#
+# This library is free software; you can redistribute it and/or modify it
+# under the terms of version 2.1 of the GNU Lesser General Public License as
+# published by the Free Software Foundation.
+#
+# This library is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
+# for more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with this library; if not, see <http://www.gnu.org/licenses>.
+#
+
+from cgroup import Cgroup, CgroupVersion
+import consts
+import ftests
+import os
+from run import Run
+import sys
+
+CONTROLLER = 'cpuset'
+CGNAME = '038cgxget'
+
+TABLE = [
+    # writesetting, writeval, writever, readsetting, readval, readver
+    ['cpuset.cpus', '0-1', CgroupVersion.CGROUP_V1, 'cpuset.cpus', '0-1', CgroupVersion.CGROUP_V1],
+    ['cpuset.cpus', '0-1', CgroupVersion.CGROUP_V1, 'cpuset.cpus', '0-1', CgroupVersion.CGROUP_V2],
+    ['cpuset.cpus', '0-1', CgroupVersion.CGROUP_V1, 'cpuset.effective_cpus', '0-1', CgroupVersion.CGROUP_V1],
+    ['cpuset.cpus', '0-1', CgroupVersion.CGROUP_V1, 'cpuset.cpus.effective', '0-1', CgroupVersion.CGROUP_V2],
+    ['cpuset.cpus', '1', CgroupVersion.CGROUP_V2, 'cpuset.cpus', '1', CgroupVersion.CGROUP_V1],
+    ['cpuset.cpus', '1', CgroupVersion.CGROUP_V2, 'cpuset.cpus', '1', CgroupVersion.CGROUP_V2],
+
+    ['cpuset.mems', '0', CgroupVersion.CGROUP_V1, 'cpuset.mems', '0', CgroupVersion.CGROUP_V1],
+    ['cpuset.mems', '0', CgroupVersion.CGROUP_V1, 'cpuset.mems', '0', CgroupVersion.CGROUP_V2],
+    ['cpuset.mems', '0', CgroupVersion.CGROUP_V2, 'cpuset.mems', '0', CgroupVersion.CGROUP_V1],
+    ['cpuset.mems', '0', CgroupVersion.CGROUP_V2, 'cpuset.mems', '0', CgroupVersion.CGROUP_V2],
+    ['cpuset.mems', '0', CgroupVersion.CGROUP_V1, 'cpuset.effective_mems', '0', CgroupVersion.CGROUP_V1],
+    ['cpuset.mems', '0', CgroupVersion.CGROUP_V1, 'cpuset.mems.effective', '0', CgroupVersion.CGROUP_V2],
+
+    ['cpuset.cpu_exclusive', '1', CgroupVersion.CGROUP_V1, 'cpuset.cpu_exclusive', '1', CgroupVersion.CGROUP_V1],
+    ['cpuset.cpu_exclusive', '1', CgroupVersion.CGROUP_V1, 'cpuset.cpus.partition', 'root', CgroupVersion.CGROUP_V2],
+    ['cpuset.cpu_exclusive', '0', CgroupVersion.CGROUP_V1, 'cpuset.cpu_exclusive', '0', CgroupVersion.CGROUP_V1],
+    ['cpuset.cpu_exclusive', '0', CgroupVersion.CGROUP_V1, 'cpuset.cpus.partition', 'member', CgroupVersion.CGROUP_V2],
+
+    ['cpuset.cpus.partition', 'root', CgroupVersion.CGROUP_V2, 'cpuset.cpu_exclusive', '1', CgroupVersion.CGROUP_V1],
+    ['cpuset.cpus.partition', 'root', CgroupVersion.CGROUP_V2, 'cpuset.cpus.partition', 'root', CgroupVersion.CGROUP_V2],
+    ['cpuset.cpus.partition', 'member', CgroupVersion.CGROUP_V2, 'cpuset.cpu_exclusive', '0', CgroupVersion.CGROUP_V1],
+    ['cpuset.cpus.partition', 'member', CgroupVersion.CGROUP_V2, 'cpuset.cpus.partition', 'member', CgroupVersion.CGROUP_V2],
+]
+
+def prereqs(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    nproc = Run.run('nproc')
+    if int(nproc) < 2:
+        result = consts.TEST_SKIPPED
+        cause = "This test requires 2 or more processors"
+
+    if config.args.container:
+        result = consts.TEST_SKIPPED
+        cause = "This test cannot be run within a container"
+        return result, cause
+
+    return result, cause
+
+def setup(config):
+    Cgroup.create(config, CONTROLLER, CGNAME)
+
+def test(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    for entry in TABLE:
+        Cgroup.xset(config, cgname=CGNAME, setting=entry[0], value=entry[1],
+                    version=entry[2])
+
+        out = Cgroup.xget(config, cgname=CGNAME, setting=entry[3],
+                          version=entry[5], values_only=True,
+                          print_headers=False)
+        if out != entry[4]:
+            result = consts.TEST_FAILED
+            cause = "After setting {}={}, expected {}={}, but received {}={}".format(
+                    entry[0], entry[1], entry[3], entry[4], entry[3], out)
+            return result, cause
+
+    return result, cause
+
+def teardown(config):
+    Cgroup.delete(config, CONTROLLER, CGNAME)
+
+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))