Comment 7 for bug 1450649

The current migration code has already provided a chance for different drivers to implement the method

def update_migrated_volume(self, ctxt, volume, backend_volume):

to do some necessary updates after the migration is done.

I provide a patch implementing this method for LVM and Storwize driver in terms of adding the code to rename the back-end volume.
I think other storage back-ends can also implement in a similar way.