Re: [Qemu-devel] [PATCH 00/16] QEMU vhost-scsi support

[ronnie sahlberg]

On Tue, Apr 24, 2012 at 7:13 PM, Stefan Hajnoczi <address@hidden> wrote:
> On Tue, Apr 24, 2012 at 8:05 AM, Paolo Bonzini <address@hidden> wrote:
>> Il 24/04/2012 06:21, ronnie sahlberg ha scritto:
>>> Hi Stefan,
>>>
>>> A little bit off-topic but
>>>
>>> When you design the proper place and API to plug virt-scsi into an
>>> external SCSI parser outside of qemu like the target in the kernel ...
>>>
>>> It would be very nice if one could also plug virt-scsi into libiscsi
>>> and pass the CDBs straight to the remote iSCSI target too.
>>> Keep some thoughts on virt-scsi + libiscsi integration.
>>
>> Yes, that makes a lot of sense.  It's a bit harder than scsi-generic but
>> we do want to get there.
>
> Yep.  I think previously there was discussion about a libiscsi
> SCSIDevice so that guest SCSI commands can be sent to libiscsi LUNs
> without going through the QEMU block layer.  (Another way to pass
> arbitrary SCSI commands to libiscsi is by hooking up .bdrv_aio_ioctl()
> with SG_IO scsi-generic compatible code in block/iscsi.c.)

bdrv_aio_ioctl() and SG_IO would mean #ifdef __linux__

So maybe it would be better to instead create a new hw/scsi-scsi.c
that calls straight into block/iscsi.c ?
That would be a lot more work than emulating SG_IO but would work on
all platforms.


Comments? How important is !linux support ?

regards
ronnie sahlberg