Christoph Hellwig <[email protected]> wrote on 08.02.2006 15:08:39:
> On Wed, Feb 08, 2006 at 01:37:09PM +0100, Heiko Carstens wrote:
> > From: Horst Hummel <[email protected]>
> >
> > Because of missing discipline validition dasd ioctls calls may not
return
> > when called on a device handled by a different discipline.
> > (e.g calling ECKD specific BIODASDGATTR on an FBA device).
> > This addresses one of the issues Christoph has with the dasd driver.
>
> Nack. the right way to do this is to have per-discipline ioctl
methods,
> even if we can't remove the dasd_ioctl_register interface yet due to
> other disagreements. Just resurect those parts of my patch.
>
As I already tried to explain, the DASD ioctls are _not_ discipline
related. A discipline is more or less a 'access method to a physical
DASD'. Sine the ioctls are related to 'functional components', each
ioctl could be valid in combination with none, one, two or every of
the currently supported disciplines (ECKD, FBA, DIAG).
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