[OpenAFS-devel] semantics of stat'ing a mount point

[Derek Atkins]

Honestly, I haven't come up with an architecture that would use it.
But being able to differentiate different errors is _always_ a good
thing.

-derek

Derrick J Brashear <shadow@dementia.org> writes:

> On 23 Feb 2001, Derek Atkins wrote:
> 
> > It would be useful in the case of dynamic cell insertion to
> > differentiate between "unknown cell" and "unknown volume".  So,
> > I say keep it how it is.
> 
> How so? Differentiationmay be useful, but I can't think how this could be
> exploited usefully for that; Once you're making changes in the cache
> manager, whatthe clients see doesn't matter
> 
> -D
> 
> > Derrick J Brashear <shadow@dementia.org> writes:
> > 
> > > In previous AFS versions, stat'ing an AFS mount point returns ENODEV for
> > > an unknown volume, but ENOENT if the mount point is for an unknown cell.
> > > 
> > > A patch proposes to change that to consistently return ENODEV. Is anyone
> > > relying on the distinction? Cases could be made for
> > > -ENOENT represents a missing entry in the CellServDB for the cell
> > > -mount points should be treated like dangling symlinks and always return
> > > ENOENT when invalid
> > > 
> > > The latter would be a considerable semantic change, though.
> > > 
> > > -D
> > > 
> > > 
> > > 
> > > 
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> > 
> > -- 
> >        Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
> >        Member, MIT Student Information Processing Board  (SIPB)
> >        URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
> >        warlord@MIT.EDU                        PGP key available
> > 
> 
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-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord@MIT.EDU                        PGP key available