[nfsv4] Spencer Dawkins' Yes on draft-ietf-nfsv4-versioning-09: (with COMMENT)

Spencer Dawkins <spencerdawkins.ietf@gmail.com> Fri, 12 May 2017 14:36 UTC

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From: Spencer Dawkins <spencerdawkins.ietf@gmail.com>
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Date: Fri, 12 May 2017 07:36:44 -0700
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Subject: [nfsv4] Spencer Dawkins' Yes on draft-ietf-nfsv4-versioning-09: (with COMMENT)
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Spencer Dawkins has entered the following ballot position for
draft-ietf-nfsv4-versioning-09: Yes

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COMMENT:
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Russ Housley has provided a Gen-ART review for -09 version of this
document, and the author is responding to those comments.

I did have one question that came up during AD Evaluation that I wanted
to mention.

The first two drafts that used this mechanism (umask and xattrs) used two
different idioms for discovering support. The xaddrs draft defines an
xaddr_support attribute, while umask does not.

In conversations with the working group, the reasoning was that xattrs
defines a number of operations, so discovering that the complete
mechanism is supported before you start trying to use the attributes
makes sense, while umask defines only one attribute, and for any
attribute, you can find out if it is supported within a given file system
by interrogating the appropriate bit position in the REQUIRED attribute
supported_attrs, so there is no advantage to adding a umask_support
attribute. 

That all made perfect sense to me, but the explanation was helpful enough
to me that I wonder if it's worth a sentence or two, pointing out that
some protocol designers may choose one idiom, while other protocol
designers choose the other, and saying that's not a problem.

If the answer is "that explanation isn't needed", that won't change my
ballot position from Yes, of course.