[stgt] Using tgtd to pass through a SCSI tape drive

[FUJITA Tomonori]

On Sat, 31 Jul 2010 18:31:38 +1000
Mark Harvey <markh794 at gmail.com> wrote:

> > Probably, tgtd shouldn't set timeout. And tgtd also needs to pass
> > through task management functions from initiators.
> >
> > The state of tgt pass though support is that it probably works, but it
> > might useful on some cases.
> >   
> I'm not really up on 'task management' so I'm not really in a position 
> to comment.

e.g. ISCSI_OP_SCSI_TMFUNC for iSCSI. If an initiator sends ABORT_TASK,
we need to pass though it.


> What I was thinking would be a "good idea"(tm) is for the bs_sg to issue 
> a SCSI persistent reservation (exclusive) to the device under control, 
> allow tgt to handle SCSI persistent reservation per initiator. This 
> would prevent an application on the local host accessing the target 
> while under tgt control.

But what we do if an initiator sends PR?

I don't think we need to worry about local access. That's the
responsibility of users. You can mess up disk even with it mounted.
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