Re: XATTRs in NFS?

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On Oct 27, 2013, at 12:56 PM, Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:

> On Sun, Oct 27, 2013 at 12:31:46PM +0000, Myklebust, Trond wrote:
>> The NFSv4 working group has no authority to do so. POSIX would be the right address.
> 
> The complete lack of clue, authority or even defined semantics didn't
> stop them from defining their ACL model.  User extended attributes are
> harmless compared to that, even if everyone has subtly different
> flavours.
> 

The user xattrs are in principle harmless. What about "trusted.*"?

BTW: caching any xattrs is a problem. There is no close-to-open model that you can use and neither is there locking. This is already causing a problem for labeled nfs...

Trond--
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