From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Hellwig Subject: Re: Support for CDB length > 16 Date: Tue, 18 Nov 2003 11:44:44 +0000 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <20031118114444.A24013@infradead.org> References: <3FB9E777.6020404@torque.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from pub234.cambridge.redhat.com ([213.86.99.234]:24334 "EHLO phoenix.infradead.org") by vger.kernel.org with ESMTP id S262591AbTKRLoz (ORCPT ); Tue, 18 Nov 2003 06:44:55 -0500 Content-Disposition: inline In-Reply-To: ; from LIRANS@il.ibm.com on Tue, Nov 18, 2003 at 01:15:31PM +0200 List-Id: linux-scsi@vger.kernel.org To: Liran Schour Cc: dougg@torque.net, linux-scsi@vger.kernel.org On Tue, Nov 18, 2003 at 01:15:31PM +0200, Liran Schour wrote: > > Is there an upper limit on the size of the cdb you are interested in > > (e.g. XDWRITE EXTENDED in SBC-2 is 64 bytes)? > I have an upperlimit of 256 bytes. That's far beyond what we could increase the cmnd buffers to. > > > How were you planning to pass the cdb (length > 16) to the kernel? > I am planning to build a filesystem in the kernel that will be over an OSD > SCSI device. This layer will interact directly with the SCSI system. I don't think there's a lot of chance to see your project supported in mainline kernels. Maybe we'll have to find a way to make it work when it's ready for mainline submission, but before that you're on your own..