[Storwize_SVC]Retype operation failure for GMCV due to update_clean_rate

[Prajakta]

Cinder Version - Yoga

Cinder Backend - IBM Storwize_SVC

Retype GMCV operations are failing for below scenarios
1)Retype a GMCV volume from gmcv-type to non-rep-type
2)Retype a GMCV 'in-use' volume from gmcv-type to non-rep-type
3)Retype a in-use GMCV volume with qos io throttling unit 'iops' to other
possible volume types with different qos io throttling units
4)Retype a in-use GMCV rep volume with qos io throttling unit 'iops_per_gb'
to other possible volume types with different qos io throttling units
5)Retype a in-use GMCV volume with qos io throttling unit 'mbps' to other
possible volume types with different qos io throttling units

Below is the command executed in storage and error received :
IBM_Storwize:os2076:superuser>svctask chfcmap -cleanrate 50 -autodelete on 455
CMMVC7154E The task cannot be completed because the specified FlashCopy mapping is controlled by a Metro Mirror or Global Mirror relationship.

The error msg is being invoked from update_clean_rate function in Retype operation in Storwize_SVC_Common.py(Lines 5585 , 2280,687).

Error msg in Cinder Volume logs -
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager rep_type = self._get_volume_replicated_type(ctxt, new_volume)
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager File "/opt/stack/cinder/cinder/volume/drivers/ibm/storwize_svc/storwize_svc_common.py", line 2289, in update_clean_rate
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager raise exception.InvalidInput(
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager File "/opt/stack/cinder/cinder/volume/drivers/ibm/storwize_svc/storwize_svc_common.py", line 687, in chfcmap
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager self.run_ssh_assert_no_output(ssh_cmd)

Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager raise exception.VolumeBackendAPIException(data=msg)
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager cinder.exception.VolumeBackendAPIException: Bad or unexpected response from the storage volume backend API: CLI Exception output:
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager command: ['svctask', 'chfcmap', '-cleanrate', '50', '-autodelete', 'on', '455']
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager stdout:
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager stderr: CMMVC7154E The task cannot be completed because the specified FlashCopy mapping is controlled by a Metro Mirror or Global Mirror relationship.
Mar 30 16:48:37 altranvm1 cinder-volume[844443]: ERROR cinder.volume.manager .