block dangerous passthrough operation

[Jens Axboe]

On 11/16/22 6:01 AM, Christoph Hellwig wrote:
> Hi all,
> 
> I recently had to debug some testing code that tried to send fabrics
> commands and caused a major havoc.  This series adds checks for various
> very low-level passthrough commands that have no business sent by anyone
> but the driver itself.  The list might now be complete, so discussion
> is welcome.

Honestly, I think this is a mess, and it's exactly why I didn't like
going down this path to begin with. I'm assuming that last 'now' above
should be a 'not'? This approach is not going to be maintainable.

-- 
Jens Axboe