Re: [RFC] Reinstate NFS exportability for JFFS2.

David Woodhouse
2008-08-01T13:56:21Z

On Fri, 2008-08-01 at 14:36 +0100, David Woodhouse wrote:
> Those are needed by NFSv3 too -- and can be handled with a lookup_fh()
> method in the file system which is guaranteed to be called from within
> the filldir callback, and some support in the VFS for checking if it's a
> mountpoint.
>
> NFSv4 introduces another problem though, which is that it seems to be
> able to return the _full_ getattr() results for each object, and there's
> no real way round the fact that we need to do the ->lookup() for that.
>
> If sane clients aren't expected to _ask_ for that, though, then perhaps
> it would be OK to fall back to something like the existing
> readdir-to-buffer hack for that case, while most normal clients won't
> trigger it.

Or maybe we could just mask the offending attrs out of ->rd_bmval for
readdir calls, and say we don't support them? Would anyone scream if we
did that?

--
David Woodhouse Open Source Technology Centre
David.Woodhouse@intel.com Intel Corporation