Re: [Qemu-devel] Re: [PATCH] virtio-blk: add SGI_IO passthru support

[Anthony Liguori]

Christoph Hellwig wrote:
> > Should we be 
> > handling some SCSI cmds internally to QEMU (like eject operations) and 
> > supporting media=cdrom in -drive for if=virtio?
> >     
>
> Not quite yet.  Eventually I want to support a virtio-scsi kind of
> transport which would use the same virtio-blk protocol but only send
> scsi commands.  We'd need a different driver on the Linux side for
> it that registers to the scsi layer.  On the QEMU side it could either
> do pass-through to a real scsi device using SG_IO or use the existing
> command scsi emulator in scsi-disk.c.
>   

Ah, excellent.  I think that's a great thing to do.  So do you think 
virtio-scsi would deprecate virtio-blk?

I've gotten a number of requests for exposing stuff like VPD through 
virtio-blk.  There's also a surprising amount of software out there that 
assumes /dev/sdX or /dev/hdX naming.

Regards,

Anthony Liguori