Comment 1 for bug 2000584

Reviewed: https://review.opendev.org/c/openstack/glance_store/+/843103
Committed: https://opendev.org/openstack/glance_store/commit/d0733a0f4f0c803ca0333605a21552dba1da931e
Submitter: "Zuul (22348)"
Branch: master

commit d0733a0f4f0c803ca0333605a21552dba1da931e
Author: whoami-rajat <email address hidden>
Date: Tue May 24 11:44:48 2022 +0530

    Refactor/restructure glance cinder store

    This is an effort to decouple some of the cinder backend specific
    code (like nfs, scaleio) from the generic logic.
    The purpose is to make the code modular and any change
    for a particular cinder backend should not affect the code path
    of other backends thereby reducing regression.
    This is also required for another use case of supporting extend
    of attached volumes added in [1].
    Following are the major changes done in this patch:

    1) Move cinder store to a new directory 'cinder' and rename
       'cinder.py' to 'store.py' (similar to swift)
    2) Create new files for nfs and scaleio backends for moving code
       specific to these backends into their own separate file.
       This also fixes one bug when using sparse files in nfs and
       we wait for file size to be equal to volume size (initially done
       for scaleio/powerflex backend) but this will never happen for
       nfs sparse files. See bug: 2000584
    3) Move cinder tests to 'tests/unit/cinder' directory and add tests
       for base, nfs and scaleio files.
    4) Modify/fix existing tests

    Closes-Bug: #2000584

    [1] https://review.opendev.org/c/openstack/glance_store/+/868742

    Depends-On: https://review.opendev.org/c/openstack/glance/+/869021

    Change-Id: I26c272b6c503e98fbbafca411d3eec47283bd6fc