On 04/18/2011 04:05 PM, Hannes Reinecke wrote:
My proposal would be to implement a full virtio-scsi _host_, and extend
the proposal to be able to handle the transport layer too.
Yes, I have added this independently from Friday to today, and it is why
I haven't sent the proposal yet.
At the lastest we would need to include a LUN address before the CDB,
and define TMF command values for proper error recovery.
I haven't yet worked out TMF, but I did add a LUN.
That way we could handle hotplug / -unplug via a simple host rescan
It's a bit more complicated because you also want guest-initiated
unplug, and SAM transport reset events include more than hotplug/unplug.
I couldn't find that in either SPC or SAM indeed. It seems like a
pretty widespread assumption though. Perhaps Nicholas or Hannes know
where it comes from.
96 bytes is a carry-over from scsi parallel. We shouldn't rely
on a fixed length here but rather use an additional pointer/iovec and
length field.
Check SG_IO header on how it's done.
Will do.
Paolo
