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Re: [nfsv4] Eric Rescorla's Discuss on draft-ietf-nfsv4-xattrs-05: (with DISCUSS)

Christoph Hellwig <hch@lst.de> Tue, 06 June 2017 06:30 UTC

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Date: Tue, 06 Jun 2017 08:30:27 +0200
From: Christoph Hellwig <hch@lst.de>
To: Nico Williams <nico@cryptonector.com>
Cc: "J. Bruce Fields" <bfields@fieldses.org>, Eric Rescorla <ekr@rtfm.com>, draft-ietf-nfsv4-xattrs@ietf.org, nfsv4-chairs@ietf.org, NFSv4 <nfsv4@ietf.org>, Spencer Dawkins at IETF <spencerdawkins.ietf@gmail.com>, The IESG <iesg@ietf.org>
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Subject: Re: [nfsv4] Eric Rescorla's Discuss on draft-ietf-nfsv4-xattrs-05: (with DISCUSS)
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On Mon, Jun 05, 2017 at 01:56:21PM -0500, Nico Williams wrote:
> > (and the rest of that paragraph).
> 
> I see a "system xattrs" extension in NFSv4's future.

I don't.  And I'm going to do all in my powers so that I don't have
to see it.  The "system" xattrs in Linux were a major mistakes that
no one should repeat - it's another ioctl-like way to do arbitrary
syscalls without the usual process and a resulting low quality.  We
should no extend this to NFS.

Anything actually useful provided through "system" xattrs in Linux
could be implemented using a new fattr4 values as a NFSv4 extension,
but it should go through proper WG review.

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