Re: [LSF/MM ATTEND] Richacls

[Jeremy Allison <jra@samba.org>]

On Mon, Jan 12, 2015 at 04:06:44PM -0500, Andreas Gruenbacher wrote:
> Hello,
> 
> I would like to discuss the status and next steps for completing
> richacl support (http://en.wikipedia.org/wiki/Richacls) in
> the vfs, local file systems, nfs, cifs.
> 
> Right now, we don't have kernel support for a file permission
> model powerful enough to support both POSIX permissions and
> NFSv4 / CIFS access control lists at the same time.  As a result,
> support for the NFSv4 and CIFS permission models is very limited,
> and permission wise, Linux is neither a very good client nor
> server to other systems.  For example, the permission to only
> append to a file or to take ownership of a file cannot be
> represented.  When files are copied across systems, file
> permissions change or are lost.  This should be improved.
> 
> I've started working on this a long time ago but didn't have
> enough time to complete it.  More recently, Aneesh Kumar has
> spent time on this topic (http://lwn.net/Articles/596517/) but
> eventually also stopped working on it.  Things have improved on
> my side and I'll be able to work on this again now, though.
> 
> Thanks,
> Andreas

Andreas, I would be very keen on seeing you complete
this work, and am willing to actively test any code
you may produce with Samba !

Thanks,

Jeremy.