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Thin provisioning[1] is a feature supported by SolidFire hardware but in the current driver implementation it is not managed by Cinder. Therefore, scheduler options to control thin provisioning would not work in this driver. In this patch, we make the SolidFire driver compliant with Cinder thin provisioning framework and also fix a few values that were not being properly reported. To keep the driver behavior consistent and avoid breaking rolling upgrades, a new option is added. So, by default, the driver will behave in the old way, and in the next releases this new option will be the new default. [1] https://specs.openstack.org/openstack/cinder-specs/specs/kilo/over-subscription-in-thin-provisioning.html Change-Id: Ibba1dcf3deef27a9e1272d4e806f3e09ebd4ca4a Closes-bug: #1784042
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