NFSv4 Version Management
draft-ietf-nfsv4-versioning-05

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Last updated 2016-07-28
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NFSv4                                                          D. Noveck
Internet-Draft                                                       HPE
Updates: 5661 (if approved)                                July 28, 2016
Intended status: Standards Track
Expires: January 29, 2017

                        NFSv4 Version Management
                     draft-ietf-nfsv4-versioning-05

Abstract

   This document describes the management of versioning within the NFSv4
   family of protocols.  It covers the creation of minor versions, the
   addition of optional features to existing minor versions, and the
   correction of flaws in features already published as Proposed
   Standards.  The rules relating to the construction of minor versions
   and the interaction of minor version implementations that appear in
   this document supersede the minor versioning rules in RFC5661.

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF).  Note that other groups may also distribute
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   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
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   time.  It is inappropriate to use Internet-Drafts as reference
   material or to cite them other than as "work in progress."

   This Internet-Draft will expire on January 29, 2017.

Copyright Notice

   Copyright (c) 2016 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents
   (http://trustee.ietf.org/license-info) in effect on the date of
   publication of this document.  Please review these documents
   carefully, as they describe your rights and restrictions with respect
   to this document.  Code Components extracted from this document must

Noveck                  Expires January 29, 2017                [Page 1]
Internet-Draft              NFSv4 Versioning                   July 2016

   include Simplified BSD License text as described in Section 4.e of
   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
     1.1.  Existing Minor Versions . . . . . . . . . . . . . . . . .   4
     1.2.  Updated NFSv4 Version Management Framework  . . . . . . .   4
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   5
     2.1.  Use of Keywords Defined in RFC2119  . . . . . . . . . . .   6
     2.2.  Use of Feature Statuses . . . . . . . . . . . . . . . . .   7
     2.3.  NFSv4 Versions  . . . . . . . . . . . . . . . . . . . . .   8
   3.  Consolidation of Version Management Rules . . . . . . . . . .   9
   4.  XDR Considerations  . . . . . . . . . . . . . . . . . . . . .  11
     4.1.  XDR Extension . . . . . . . . . . . . . . . . . . . . . .  11
       4.1.1.  XDR Extension in General  . . . . . . . . . . . . . .  11
       4.1.2.  Particulars of XDR Extension within NFSv4 . . . . . .  12
       4.1.3.  Rules for XDR Extension within NFSv4  . . . . . . . .  13
     4.2.  Handling of Protocol Elements . . . . . . . . . . . . . .  13
     4.3.  Organization of Protocol Elements . . . . . . . . . . . .  15
     4.4.  Inter-version Interoperability  . . . . . . . . . . . . .  15
       4.4.1.  Requirements for Knowledge of Protocol Elements . . .  15
       4.4.2.  Establishing Interoperability . . . . . . . . . . . .  17
       4.4.3.  Determining Knowledge of Protocol Elements  . . . . .  18
       4.4.4.  Interoperability Between Version Groups . . . . . . .  19
   5.  Other NFSv4 Protocol Changes  . . . . . . . . . . . . . . . .  19
     5.1.  Non-XDR Protocol Changes  . . . . . . . . . . . . . . . .  20
       5.1.1.  Field Interpretation and Use  . . . . . . . . . . . .  20
       5.1.2.  Behavioral Changes  . . . . . . . . . . . . . . . . .  21
       5.1.3.  Rules for non-XDR changes . . . . . . . . . . . . . .  22
     5.2.  Specification of Associated Protocols . . . . . . . . . .  22
       5.2.1.  Associated Protocols via pNFS Mapping Types . . . . .  23
       5.2.2.  Additional Forms of Associated Protocols  . . . . . .  23
   6.  NFSv4 Protocol Features . . . . . . . . . . . . . . . . . . .  24
     6.1.  Previous Uses of the Feature Concept  . . . . . . . . . .  25
     6.2.  Rules for Protocol Feature Construction . . . . . . . . .  26
     6.3.  Statuses of Features  . . . . . . . . . . . . . . . . . .  26
     6.4.  Statuses of Protocol Elements Within Features . . . . . .  27
     6.5.  Determining Protocol Element Support  . . . . . . . . . .  29
     6.6.  Feature Discovery . . . . . . . . . . . . . . . . . . . .  30
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