Re: [PATCH] support identification of Xen virtual block devices

[Ian Campbell <ijc@hellion.org.uk>]

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On Thu, 2009-04-16 at 22:17 +0200, Kay Sievers wrote:
> On Thu, Apr 16, 2009 at 20:37, Ian Campbell <ijc@hellion.org.uk> wrote:
> >
> > * Add xenvb_id utility to identify Xen disk and CD-ROM devices.
> 
> What's the reason xen optical drives don't behave like real drives,
> and need a xen specific tool? That sounds rather odd,

They aren't proper SCSI devices so you can't do SCSI inquiry like
cdrom_id wants, the properties you can query from a Xen vbd are very
basic, basically just TYPE=disk|cd.

I suppose I could make the SCSI INQ stuff in cdrom_id optional, since
the CDROM_GET_CAPABILITY ioctl is implemented. Would that be preferred?
It would be essentially making the stuff added in
fd7a285e6293fddd3fbc68b519dcd367adeb72c4 optional.

> > * Add support to path_id for Xen vbd devices
> 
> Applied this part.

Thanks,
Ian.

-- 
Ian Campbell

BOFH excuse #350:

paradigm shift...without a clutch

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