Re: genfs ignoring VOP_STRATEGY() buf's returned error

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Fri, Mar 27, 2009 at 02:45:15PM +0100, Reinoud Zandijk wrote:
> Dear Juergen,
> 
> On Fri, Mar 27, 2009 at 12:47:57PM +0100, Juergen Hannken-Illjes wrote:
> > On Thu, Mar 26, 2009 at 06:12:23PM +0100, Reinoud Zandijk wrote:
> > Chances are low you will get async errors here as the write requests are
> > still in transit.  If you are looking for errors from VOP_STRATEGY() you
> > mean something like:
> > 
> >     int error, allerror;
> > 
> >     allerror = 0;
> > 
> >     error = VOP_STRATEGY(devvp, bp);
> >     if (error && allerror == 0)
> >             allerror = error;
> >     
> > As we are writing devvp, allerror will catch only fscow errors.
> > spec_strategy() calls bdev_strategy() and returns 0.
> 
> What i want to catch is out-of-disc space for late allocation file systems
> like UDF. In those cases VOP_STRATEGY() will return an error. The structure of
> nested buffers will propagate the error code to the master buffer. When
> testing this patch it did catch the out-of-disc space and passed it to the
> cp(1) processes. So far it does what it should do.

Could this also affect cp on a ffs with quotas ?

-- 
Manuel Bouyer, LIP6, Universite Paris VI.           
Manuel.Bouyer%lip6.fr@localhost
     NetBSD: 26 ans d'experience feront toujours la difference
--