Re: [nfsv4] draft-haynes-nfsv4-versioning-01

Christoph Hellwig <hch@lst.de> Thu, 23 October 2014 07:21 UTC

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Date: Thu, 23 Oct 2014 09:20:59 +0200
From: Christoph Hellwig <hch@lst.de>
To: Benny Halevy <bhalevy@primarydata.com>
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Subject: Re: [nfsv4] draft-haynes-nfsv4-versioning-01
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On Thu, Oct 23, 2014 at 09:18:26AM +0300, Benny Halevy wrote:
> Why wouldn't they be able to respond with "not supported"?
> Even today some callbacks are (feature) optional, e.g. CB_NOTIFY_DEVICEID

But clients needs to ask for it using a bitmasp in the GETDEVICEINFO
arguments.  I suspect if we really get a callback that doesn't have
an operation to request it we just need a attribute that the client
sets to allow it.