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

[Matthew Wilcox]

On Wed, Jun 18, 2014 at 09:13:27AM -0600, Keith Busch wrote:
> On Wed, 18 Jun 2014, Dan McLeran wrote:
> >SCSI UNMAP should fail if the host sends down the command with Anchor set. The
> >current code does not check this condition. This patch checks Anchor and fails
> >Scsi->NVMe translation if Anchor is set.
> 
> The reference on nvmexpress.org says the command with anchor set is
> premissible "for resource-provisioned devices".

So ... we should check whether the namespace has NSFEAT bit 0 set before
failing the command?