[stgt] VSCSI Target Driver

Erlon Cruz sombrafam at gmail.com
Thu May 27 15:57:44 CEST 2010


>>       Im working in a project aimed to port Linux virtio to Power
>
> you are talking about drivers/virtio?

Yes, we want virtio paravirtual drivers (block, net and char) running
on top of Power LPARs and communicating with the VIO server.

>> Platform, and also documenting vscsi underling operation. While
>> reading ibmvstgt.c driver, I found something I cant understand:
>>       The SCSI command is extracted from this transport frame (SRP)
>> and then pushed to the user space daemon 'tgtd' which process it,
>> right?
>
> Right.

Hmm, I got it. One more thing, what happen then with the
scatter/gatter list stored in the SRP frame? Is it sent to the user
space too? If so, how will this information be sent back to the kernel
once, in the user space?

Regards,
Erlon
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