ftests: Add a test for the memory abstraction layer

Add a test for the memory abstraction layer abstractions.
Currently only supports:
            memory.max <-> memory.limit_in_bytes
            memory.high <-> memory.soft_limit_in_bytes

-----------------------------------------------------------------
Test Results:
        Run Date:                          Apr 14 14:52:47
        Passed:                                  1 test(s)
        Skipped:                                 0 test(s)
        Failed:                                  0 test(s)
-----------------------------------------------------------------
Timing Results:
        Test                              Time (sec)
        --------------------------------------------
        setup                                   0.00
        093-cgxget-memory_settings.py           3.34
        teardown                                0.00
        --------------------------------------------
        Total Run Time                          3.34

[Kamalesh removed the unused exceptions variable (lint warnings)]
Signed-off-by: Tom Hromatka <tom.hromatka@oracle.com>
Signed-off-by: Kamalesh Babulal <kamalesh.babulal@oracle.com>

diff --git a/tests/ftests/093-cgxget-memory_settings.py b/tests/ftests/093-cgxget-memory_settings.py
new file mode 100755 (executable)
index 0000000..6e2cbad
--- /dev/null
+++ b/tests/ftests/093-cgxget-memory_settings.py
@@ -0,0 +1,201 @@
+#!/usr/bin/env python3
+# SPDX-License-Identifier: LGPL-2.1-only
+#
+# cgxget functionality test - various cpuset settings
+#
+# Copyright (c) 2021-2025 Oracle and/or its affiliates.
+# Author: Tom Hromatka <tom.hromatka@oracle.com>
+#
+
+from cgroup import Cgroup, CgroupVersion
+from run import RunError
+import consts
+import ftests
+import sys
+import os
+
+CONTROLLER = 'memory'
+CGNAME = '093cgxget'
+
+CGRP_VER_V1 = CgroupVersion.CGROUP_V1
+CGRP_VER_V2 = CgroupVersion.CGROUP_V2
+
+TABLE = [
+    # writesetting, writeval, writever, readsetting, readval, readver
+
+    # memory.limit_in_bytes -> memory.max
+    ['memory.limit_in_bytes', '0', CGRP_VER_V1,
+     'memory.limit_in_bytes', '0', CGRP_VER_V1],
+    ['memory.limit_in_bytes', '0', CGRP_VER_V1,
+     'memory.max', '0', CGRP_VER_V2],
+
+    ['memory.limit_in_bytes', '4096000', CGRP_VER_V1,
+     'memory.limit_in_bytes', '4096000', CGRP_VER_V1],
+    ['memory.limit_in_bytes', '8192000', CGRP_VER_V1,
+     'memory.max', '8192000', CGRP_VER_V2],
+
+    ['memory.limit_in_bytes', '9223372036854771712', CGRP_VER_V1,
+     'memory.limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+    ['memory.limit_in_bytes', '9223372036854771712', CGRP_VER_V1,
+     'memory.max', 'max', CGRP_VER_V2],
+
+    ['memory.limit_in_bytes', '9223372036860000000', CGRP_VER_V1,
+     'memory.limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+    ['memory.limit_in_bytes', '9223372036860000000', CGRP_VER_V1,
+     'memory.max', 'max', CGRP_VER_V2],
+
+    ['memory.limit_in_bytes', '-1', CGRP_VER_V1,
+     'memory.limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+    ['memory.limit_in_bytes', '-1', CGRP_VER_V1,
+     'memory.max', 'max', CGRP_VER_V2],
+
+    # memory.soft_limit_in_bytes -> memory.high
+    ['memory.soft_limit_in_bytes', '0', CGRP_VER_V1,
+     'memory.soft_limit_in_bytes', '0', CGRP_VER_V1],
+    ['memory.soft_limit_in_bytes', '0', CGRP_VER_V1,
+     'memory.high', '0', CGRP_VER_V2],
+
+    ['memory.soft_limit_in_bytes', '409600', CGRP_VER_V1,
+     'memory.soft_limit_in_bytes', '409600', CGRP_VER_V1],
+    ['memory.soft_limit_in_bytes', '819200', CGRP_VER_V1,
+     'memory.high', '819200', CGRP_VER_V2],
+
+    ['memory.soft_limit_in_bytes', '9223372036854771712', CGRP_VER_V1,
+     'memory.soft_limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+    ['memory.soft_limit_in_bytes', '9223372036854771712', CGRP_VER_V1,
+     'memory.high', 'max', CGRP_VER_V2],
+
+    ['memory.soft_limit_in_bytes', '9223372036860000000', CGRP_VER_V1,
+     'memory.soft_limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+    ['memory.soft_limit_in_bytes', '9223372036860000000', CGRP_VER_V1,
+     'memory.high', 'max', CGRP_VER_V2],
+
+    ['memory.soft_limit_in_bytes', '-1', CGRP_VER_V1,
+     'memory.soft_limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+    ['memory.soft_limit_in_bytes', '-1', CGRP_VER_V1,
+     'memory.high', 'max', CGRP_VER_V2],
+
+    # memory.max -> memory.limit_in_bytes
+    ['memory.max', '0', CGRP_VER_V2,
+     'memory.max', '0', CGRP_VER_V2],
+    ['memory.max', '0', CGRP_VER_V2,
+     'memory.limit_in_bytes', '0', CGRP_VER_V1],
+
+    ['memory.max', '40960', CGRP_VER_V2,
+     'memory.max', '40960', CGRP_VER_V2],
+    ['memory.max', '81920', CGRP_VER_V2,
+     'memory.limit_in_bytes', '81920', CGRP_VER_V1],
+
+    ['memory.max', 'max', CGRP_VER_V2,
+     'memory.max', 'max', CGRP_VER_V2],
+    ['memory.max', 'max', CGRP_VER_V2,
+     'memory.limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+
+    # memory.high -> memory.soft_limit_in_bytes
+    ['memory.high', '0', CGRP_VER_V2,
+     'memory.high', '0', CGRP_VER_V2],
+    ['memory.high', '0', CGRP_VER_V2,
+     'memory.soft_limit_in_bytes', '0', CGRP_VER_V1],
+
+    ['memory.high', '4096', CGRP_VER_V2,
+     'memory.high', '4096', CGRP_VER_V2],
+    ['memory.high', '8192', CGRP_VER_V2,
+     'memory.soft_limit_in_bytes', '8192', CGRP_VER_V1],
+
+    ['memory.high', 'max', CGRP_VER_V2,
+     'memory.high', 'max', CGRP_VER_V2],
+    ['memory.high', 'max', CGRP_VER_V2,
+     'memory.soft_limit_in_bytes', '9223372036854771712', CGRP_VER_V1],
+]
+
+
+def prereqs(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    return result, cause
+
+
+def setup(config):
+    Cgroup.create(config, CONTROLLER, CGNAME)
+
+
+def invalid_values_test(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    try:
+        Cgroup.xset(config, cgname=CGNAME, setting='memory.limit_in_bytes',
+                    value='-10', version=CGRP_VER_V1)
+    except RunError:
+        # we passed in an invalid value.  this should fail
+        pass
+    else:
+        result = consts.TEST_FAILED
+        cause = 'cgxset unexpectedly succeeded'
+
+    try:
+        Cgroup.xset(config, cgname=CGNAME, setting='memory.max',
+                    value='-10', version=CGRP_VER_V2)
+    except RunError:
+        # we passed in an invalid value.  this should fail
+        pass
+    else:
+        result = consts.TEST_FAILED
+        cause = 'cgxset unexpectedly succeeded'
+
+    return result, cause
+
+
+def test(config):
+    result = consts.TEST_PASSED
+    cause = None
+
+    result, cause = invalid_values_test(config)
+    if result != consts.TEST_PASSED:
+        return result, cause
+
+    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))
+
+# vim: set et ts=4 sw=4: