[SVF]:Fix create volume on drp

[Spectrum Virtualize Family] While creating volumes on
data reduction pool, incorrect options were picked.

This patch fixes a bug caused by a case sensitive string
comparison that caused the code to incorrectly identify
whether DRP was enabled in a pool during intialization.

Closes-Bug: #1924568
Change-Id: I5a2914d77b85e4249774f6e366b93d8b997ea50f

cinder/tests/unit/volume/drivers/ibm/test_storwize_svc.py

@@ -5437,6 +5437,45 @@ class StorwizeSVCCommonDriverTestCase(test.TestCase):
                     if 'CMMVC7050E' not in e.stderr:
                         raise
 
+    @ddt.data(('yes'), ('Yes'), ('no'), ('NO'), (''))
+    @mock.patch.object(storwize_svc_common.StorwizeHelpers,
+                       'get_pool_attrs')
+    def test_build_pool_stats_drp(self, is_drp, get_pool_attrs):
+        get_pool_attrs.return_value = {'id': 1, 'name': 'openstack',
+                                       'data_reduction': is_drp,
+                                       'easy_tier': 'on',
+                                       'capacity': '20',
+                                       'free_capacity': '40',
+                                       'used_capacity': '0',
+                                       'real_capacity': '0',
+                                       'virtual_capacity': '0',
+                                       'status': 'online',
+                                       'site_id': '1',
+                                       'site_name': 'site1'}
+        pool = 'openstack'
+        pool_stats = self.driver._build_pool_stats(pool)
+        if is_drp in ['yes', 'Yes']:
+            self.assertTrue(pool_stats['data_reduction'])
+        else:
+            self.assertFalse(pool_stats['data_reduction'])
+
+    @mock.patch.object(storwize_svc_common.StorwizeHelpers,
+                       'get_pool_attrs')
+    def test_build_pool_stats_drp_none(self, get_pool_attrs):
+        get_pool_attrs.return_value = {'id': 1, 'name': 'openstack1',
+                                       'easy_tier': 'on',
+                                       'capacity': '20',
+                                       'free_capacity': '40',
+                                       'used_capacity': '0',
+                                       'real_capacity': '0',
+                                       'virtual_capacity': '0',
+                                       'status': 'online',
+                                       'site_id': '1',
+                                       'site_name': 'site1'}
+        pool = 'openstack1'
+        pool_stats = self.driver._build_pool_stats(pool)
+        self.assertFalse(pool_stats['data_reduction'])
+
     @ddt.data(('IOPs_limit', "50"), ('bandwidth_limit_MB', "100"))
     @mock.patch.object(storwize_svc_common.StorwizeHelpers, 'get_pool_volumes')
     @mock.patch.object(storwize_svc_common.StorwizeSSH, 'lsthrottle')

cinder/volume/drivers/ibm/storwize_svc/storwize_svc_common.py

@@ -6025,10 +6025,8 @@ class StorwizeSVCCommonDriver(san.SanDriver,
 
             # Get the data_reduction information for pool and set
             # is_dr_pool flag.
-            if pool_data.get('data_reduction') == 'Yes':
+            if pool_data.get('data_reduction'):
-                is_dr_pool = True
+                is_dr_pool = pool_data.get('data_reduction').lower() == 'yes'
-            elif pool_data.get('data_reduction') == 'No':
-                is_dr_pool = False
 
             pool_stats = {
                 'pool_name': pool_data['name'],

releasenotes/notes/bug-1924568-ibm-svf-fix_drp_vol_create_issue-d1b75c4befb0e993.yaml

@@ -0,0 +1,7 @@
+---
+fixes:
+  - |
+    IBM Spectrum Virtualize Family driver
+    `Bug #1924568 <https://bugs.launchpad.net/cinder/+bug/1924568>`_:
+    Fixed issues that occurred while creating volume on data reduction
+    pool.