From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: Re: [PATCH 1/2] Use sdev_scsi2lun for SCSI parallel drivers
Date: Fri, 4 Jul 2014 06:44:37 -0700
Message-ID: <20140704134437.GA12345@infradead.org>
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To: Hannes Reinecke <hare@suse.de>
Cc: James Bottomley <jbottomley@parallels.com>, Christoph Hellwig <hch@infradead.org>, linux-scsi@vger.kernel.org

On Fri, Jul 04, 2014 at 01:54:34PM +0200, Hannes Reinecke wrote:
> SCSI-2 defines only up to 256 LUNs with a flat namespace.
> This patch introduces an accessor 'sdev_scsi2lun' which should be
> used for these drivers to avoid problems when using 64-bit LUNs
> internally.

So what would be set in the upper 48 bits for those drivers?  We receive
the LUN over the wire to start with.