PowerMax Driver - Fix for force flag

The force flag [1] can be passed to rest.py in 2 ways,
as its own parameter and as part of the internal extra_specs
dict that is set by the driver. This fix checks both location
to see if this force flag should be passed to the REST payload.

[1] https://review.opendev.org/c/openstack/cinder/+/746758

Closes-Bug: #1981420
Change-Id: I990b3e5d85054165281b7ed14cbfcc125365b20d

cinder/tests/unit/volume/drivers/dell_emc/powermax/test_powermax_rest.py

@@ -2554,3 +2554,28 @@ class PowerMaxRestTest(test.TestCase):
                 self.data.array, self.data.device_id,
                 self.data.test_snapshot_snap_name)
             self.assertEqual('0', snap_id)
+
+    def test_check_force(self):
+        extra_specs = {'pool_name': 'Diamond+DSS+SRP_1+000197800123',
+                       'slo': 'Diamond',
+                       'srp': 'SRP_1',
+                       'array': '000123456789',
+                       'interval': 3,
+                       'retries': 120}
+        self.assertEqual(
+            'false', self.rest._check_force(extra_specs))
+        self.assertEqual(
+            'false', self.rest._check_force(
+                self.data.extra_specs, force_flag=False))
+        self.assertEqual(
+            'true', self.rest._check_force(
+                self.data.extra_specs, force_flag=True))
+        extra_specs[utils.FORCE_VOL_EDIT] = True
+        self.assertEqual(
+            'true', self.rest._check_force(extra_specs))
+        self.assertEqual(
+            'true', self.rest._check_force(
+                extra_specs, force_flag=False))
+        self.assertEqual(
+            'true', self.rest._check_force(
+                extra_specs, force_flag=True))

cinder/volume/drivers/dell_emc/powermax/rest.py

@@ -1257,7 +1257,7 @@ class PowerMaxRest(object):
         if not isinstance(device_id, list):
             device_id = [device_id]
 
-        force_add = "true" if force else "false"
+        force_add = self._check_force(extra_specs, force)
 
         payload = ({"executionOption": "ASYNCHRONOUS",
                     "editStorageGroupActionParam": {
@@ -1282,8 +1282,7 @@ class PowerMaxRest(object):
         :param extra_specs: the extra specifications
         """
 
-        force_vol_edit = (
-            "true" if utils.FORCE_VOL_EDIT in extra_specs else "false")
+        force_vol_edit = self._check_force(extra_specs)
         if not isinstance(device_id, list):
             device_id = [device_id]
         payload = ({"executionOption": "ASYNCHRONOUS",
@@ -1410,7 +1409,7 @@ class PowerMaxRest(object):
         :param extra_specs: extra specifications
         :param force: force flag (necessary on a detach)
         """
-        force_flag = "true" if force else "false"
+        force_flag = self._check_force(extra_specs, force)
         payload = ({"executionOption": "ASYNCHRONOUS",
                     "editStorageGroupActionParam": {
                         "moveVolumeToStorageGroupParam": {
@@ -2200,8 +2199,7 @@ class PowerMaxRest(object):
         """
         action, operation, payload = '', '', {}
         copy = 'true' if copy else 'false'
-        force = (
-            "true" if utils.FORCE_VOL_EDIT in extra_specs else "false")
+        force = self._check_force(extra_specs)
 
         if link:
             action = "Link"
@@ -3562,3 +3560,18 @@ class PowerMaxRest(object):
         return (self.ucode_major_level >= utils.UCODE_5978 and
                 self.ucode_minor_level >= utils.UCODE_5978_HICKORY) or (
                     self.ucode_major_level >= utils.UCODE_6079)
+
+    @staticmethod
+    def _check_force(extra_specs, force_flag=False):
+        """Determine whether force should be used
+
+        Returns 'true' if force_flag is True or FORCE_VOL_EDIT is set in
+        extra_specs, otherwise returns 'false'.
+
+        :param extra_specs: extra specs dict
+        :param force_flag: force flag boolean
+
+        :returns: str (true or false)
+        """
+        return "true" if force_flag else (
+            "true" if utils.FORCE_VOL_EDIT in extra_specs else "false")

releasenotes/notes/bug-1981420-dell-powermax-fix-for-force-flag-9320910dfbf998d2.yaml

@@ -0,0 +1,8 @@
+---
+fixes:
+  - |
+    `Dell PowerMax Driver Bug #1981420 <https://bugs.launchpad.net/cinder/+bug/1981420>`_:
+    Fixed issue faced while creating synchronous volume which was caused by
+    incorrect handling of the force flag. This is corrected by checking volume
+    type extra specs for the value of "force_vol_edit"  parameter along with the
+    "force" parameter.