Comment 4 for bug 1968159

Reviewed: https://review.opendev.org/c/openstack/cinder/+/836944
Committed: https://opendev.org/openstack/cinder/commit/b99e73e96cb6448f81a2f4b2e8e624bf36bbff0e
Submitter: "Zuul (22348)"
Branch: master

commit b99e73e96cb6448f81a2f4b2e8e624bf36bbff0e
Author: haailani <email address hidden>
Date: Thu Apr 7 11:37:14 2022 +0000

    [SVf]:Fix retype failure for replication volume-type

    [Spectrum Virtualize family] While retyping GM to GM or MM to MM or
    GMCV to GMCV, chfcmap() call is being made which is resulting in retype
    operation failure.
    Error: CMMVC7154E The task cannot be completed because the specified
    FlashCopy mapping is controlled by a Metro Mirror or Global Mirror
    relationship.

    chfcmap() should not be called for any FC map which is rc_controlled.
    Hence while retyping global mirror to global mirror or
    metro mirror to metro mirror or GMCV to GMCV volume, this error comes
    up as the FC map of the volume is rc_controlled for these replication
    volume-types.

    Closes-Bug: #1968159
    Change-Id: Ic97a2501b4c895b2b655284bcc320036c2d4e217