Update cinder driver workaround

patches/cinder-vitastor.py

@@ -1,3 +1,8 @@
+# Workaround:
+# 461: allow to create volume from snapshot
+# 527: adjust iodepth for faster deletion
+# 591: add failure case when creating a volume 
+
 # Vitastor Driver for OpenStack Cinder
 #
 # --------------------------------------------
@@ -455,7 +460,7 @@ class VitastorDriver(driver.CloneableImageVD,
         vol_name = utils.convert_str(volume.name)
         snap_name = utils.convert_str(snapshot.name)
 
-        snap = self._get_image(vol_name+'@'+snap_name)
+        snap = self._get_image("volume-"+snapshot.volume_id+'@'+snap_name)
         if not snap:
             raise exception.SnapshotNotFound(snapshot_id = snap_name)
         snap_inode_id = int(resp['responses'][0]['kvs'][0]['value']['id'])
@@ -524,7 +529,7 @@ class VitastorDriver(driver.CloneableImageVD,
         for kv in layers:
             args = [
                 'vitastor-cli', 'rm-data', '--pool', str(kv['value']['pool_id']),
-                '--inode', str(kv['value']['id']), '--progress', '0',
+                '--inode', str(kv['value']['id']), '--iodepth', '4', '--progress', '0',
                 *(self._vitastor_args())
             ]
             try:
@@ -584,6 +589,8 @@ class VitastorDriver(driver.CloneableImageVD,
                 { 'request_put': { 'key': 'config/inode/'+pool_s+'/'+str(image_id), 'value': json.dumps({
                     **cfg, 'name': vol_name,
                 }) } },
+            ], 'failure': [
+                { 'request_put': { 'key': 'index/maxid/'+pool_s, 'value': image_id } },
             ] })
             if not resp.get('succeeded'):
                 # repeat