Re: [Xen-devel] [RFC PATCH] xen-block: introduces extra request to pass-through SCSI commands

[Bob Liu <bob.liu@xxxxxxxxxx>]

Hi Juergen,

On 03/02/2016 03:39 PM, Juergen Gross wrote:
> On 01/03/16 19:08, Ian Jackson wrote:
>> Bob Liu writes ("Re: [RFC PATCH] xen-block: introduces extra request to 
>> pass-through SCSI commands"):
>>> One thing I'm still not sure about PVSCSI is do we have the same security 
>>> issue since LIO can interface to any block device.
>>> E.g when using a partition /dev/sda1 as the PVSCSI-backend, but the 
>>> PVSCSI-frontend may still send SCSI operates on LUN bases (the whole disk).
>>
>> I don't think you can use pvscsi to passthrough a partition such as
>> /dev/sda1.  Such a thing is not a SCSI command target.
> 
> It might be possible via the fileio target backend. In this case LUN
> based SCSI operations are ignored/refused/emulated by LIO.
> 

Do you know whether pvscsi can work on top of multipath(the device-mapper 
framework) or LVMs?
Thank you!

Bob

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