Comment 16 for bug 1304234

Reviewed: https://review.openstack.org/197938
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=b2abe32ed02649dd2e21fbc945e8863798419450
Submitter: Jenkins
Branch: master

commit b2abe32ed02649dd2e21fbc945e8863798419450
Author: wanghao <email address hidden>
Date: Thu Jul 2 17:41:17 2015 +0800

    Validate value when user update quota

    Cinder currently doesn't check the existing resource
    when user lowers the quota sets. It should have an optional
    action that doesn't allow to update the quota of resources
    lower than current usage.

    This patch adds code to validate the update value of quota and
    ensure the value can't be lower than existing resource.

    APIImpact
    Add an optional boolean argument 'skip_validation' with default value True.
    {
      "quota_set": {xxxx},
      "skip_validation": 'True'/'False'
    }
    If skip_validation=False and the update value is lower than existing resource,
    API will return 400 Bad Request.

    Change-Id: I24428ce53e5d10e77235f372bb6d0b70ea672412
    Closes-Bug: #1304234