Re: letting glabel recognise a media change

On Monday, October 11, 2010 4:11:56 pm Pawel Jakub Dawidek wrote:
> On Mon, Oct 11, 2010 at 11:03:26AM -0400, John Baldwin wrote:
> > With CD drives you are also rather stuck in that the existing ABI for
> > controlling CD drives (e.g. ioctls in 3rd party software to eject a CD) are
> > done on the /dev/cdX device.  Ideally enclosures for removable media would
> > be separate devices from the removable media itself, but a lot of existing
> > software for CD's would break if this changes now.
> 
> Right, but I still wonder if we could execute provider orphan and
> retaste on various events like media insertion or removal. If media is
> removed we orphan provider and recreate it, which will trigger retaste,
> and this is fine there will be nothing to read from or write to (we will
> simply return errors as we do now, I think). This way we nicely
> co-operate with GEOM, but also with other tools that don't require media
> to be present (if there is no media devfs entry still exists and handles
> ioctls, it just return errors on read requests).

Oh, I would be fine with that.  I was just explaining the legacy reasons for
why we can't do the obvious thing and have separate devices for media and
media holders.

-- 
John Baldwin