From: Christoph Hellwig <hch@infradead.org>
To: Douglas Gilbert <dougg@torque.net>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>,
Jody McIntyre <scjody@modernduck.com>,
linux1394-devel@lists.sourceforge.net,
Ben Collins <bcollins@debian.org>,
linux-scsi@vger.kernel.org
Subject: Re: [PATCH] sbp2: better check of transfer direction (protects from panic or oops)
Date: Sat, 10 Dec 2005 23:13:08 +0000 [thread overview]
Message-ID: <20051210231308.GA28639@infradead.org> (raw)
In-Reply-To: <439B4CCC.3050302@torque.net>
On Sun, Dec 11, 2005 at 07:46:52AM +1000, Douglas Gilbert wrote:
> SCSI does define various bidirectional commands, mostly
> in OSD (Object Storage) and a couple in SBC (for disks,
> RAID related). Linux does support not them yet.
>
> About the time when Linux supports command lengths
> greater than 16 bytes, it will also need to support
> bidirectional data transfers. Perhaps bidirectional
> data transfers would be implemented by two scatter
> gather lists.
Yes. but we can't just allow them for existing LLDDs because that would
open a _huge_ can of worms. We'll need a flag similar to how we handle
e.g. 16 byte cdb support.
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prev parent reply other threads:[~2005-12-10 23:13 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <200512082144.jB8Li6Ul022982@einhorn.in-berlin.de>
[not found] ` <20051209171922.GW19441@conscoop.ottawa.on.ca>
2005-12-09 19:01 ` [PATCH] sbp2: better check of transfer direction (protects from panic or oops) Stefan Richter
2005-12-09 19:34 ` Jody McIntyre
2005-12-09 20:51 ` Stefan Richter
2005-12-09 22:26 ` James Bottomley
2005-12-10 14:05 ` Stefan Richter
2005-12-10 18:21 ` Christoph Hellwig
2005-12-10 21:46 ` Douglas Gilbert
2005-12-10 23:13 ` Christoph Hellwig [this message]
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