
This implements get, add, delete methods for cinder storage driver to enable users to upload/download the images to/from the volumes. This also will be useful for users who want to utilize storage features such as copy-on-write cloning for creating a new volume from an image volume efficiently. Change-Id: Ie228d1d95365e81881691af4cb8b170335a73868 Implements: blueprint cinder-store-upload-download