Hi, folkers There is some help needed for BP and Bug review, please see the links below. Those bps are introduced for enhancing the query ability of Cinder resources. We have finished and merged a part of it years ago. But there is still some work to do, I have been working on them for almost three years and updated them according to the reviewing comments many times. So, if there are no more updates required, please help me to finish those works, and it's very appreciated to merge them into Cinder project. Thank you very much. [1] bp: https://review.opendev.org/c/openstack/cinder/+/740146 [2] bp: https://review.opendev.org/c/openstack/cinder/+/733062 [3] bug: https://review.opendev.org/c/openstack/cinder/+/734415 -- Best Wishes For You!