[PATCH] NVMe: Fail SCSI->NVMe translation for UNMAP when anchor is set

[Keith Busch]

On Wed, 18 Jun 2014, Mayes, Barrett N wrote:
>> On the one hand, it says that ANC_SUP shall be set to 0.
>
> LSI proposed the following and asked for feedback by June 9.  I don't recall
> seeing any comments to this on the public reflector.
>
> ANC_SUC
> Shall be set to 0, to indicate that setting the ANCHOR bit in UNMAP is not
> supported if the namespace is not resource or thin provisioned.

> Shall be set to 1, to indicate that setting the ANCHOR bit in UNMAP is
> supported if the namespace is resource provisioned. May be set to 1 if the
> namespace is thin provisioned.

I looked at the proposal and the translation for the PROVISIONING TYPE
would indicate any device that supports UNMAP also supports ANCHOR.