Rules for NFSv4 Extensions and Minor Versions
draft-ietf-nfsv4-versioning-11

Document Type Active Internet-Draft (nfsv4 WG)
Last updated 2017-05-31 (latest revision 2017-05-30)
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NFSv4                                                          D. Noveck
Internet-Draft                                                    NetApp
Updates: 5661, 7862 (if approved)                           May 30, 2017
Intended status: Standards Track
Expires: December 1, 2017

             Rules for NFSv4 Extensions and Minor Versions
                     draft-ietf-nfsv4-versioning-11

Abstract

   This document describes the rules relating to the extension of 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 and
   other RFCs defining minor versions.

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
   working documents as Internet-Drafts.  The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current/.

   Internet-Drafts are draft documents valid for a maximum of six months
   and may be updated, replaced, or obsoleted by other documents at any
   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 December 1, 2017.

Copyright Notice

   Copyright (c) 2017 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

Noveck                  Expires December 1, 2017                [Page 1]
Internet-Draft               NFSv4 Extension                    May 2017

   to this document.  Code Components extracted from this document must
   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
   2.  Terminology . . . . . . . . . . . . . . . . . . . . . . . . .   3
     2.1.  Use of Keywords Defined in RFC2119  . . . . . . . . . . .   4
     2.2.  Use of Feature Statuses . . . . . . . . . . . . . . . . .   4
     2.3.  NFSv4 Versions  . . . . . . . . . . . . . . . . . . . . .   5
   3.  Consolidation of Extension Rules  . . . . . . . . . . . . . .   6
   4.  XDR Considerations  . . . . . . . . . . . . . . . . . . . . .   7
     4.1.  XDR Extension . . . . . . . . . . . . . . . . . . . . . .   8
     4.2.  Rules for XDR Extension within NFSv4  . . . . . . . . . .   8
     4.3.  Handling of Protocol Elements by Responders . . . . . . .   9
     4.4.  Inter-version Interoperability  . . . . . . . . . . . . .  11
       4.4.1.  Requirements for Knowledge of Protocol Elements . . .  11
       4.4.2.  Establishing Interoperability . . . . . . . . . . . .  12
       4.4.3.  Determining Knowledge of Protocol Elements  . . . . .  14
     4.5.  XDR Overlay . . . . . . . . . . . . . . . . . . . . . . .  15
   5.  Other NFSv4 Protocol Changes  . . . . . . . . . . . . . . . .  15
     5.1.  Field Interpretation and Use  . . . . . . . . . . . . . .  15
     5.2.  Behavioral Changes  . . . . . . . . . . . . . . . . . . .  16
   6.  Extending Existing Minor Versions . . . . . . . . . . . . . .  17
   7.  Minor Versions  . . . . . . . . . . . . . . . . . . . . . . .  18
     7.1.  Creation of New Minor Versions  . . . . . . . . . . . . .  18
   8.  Minor Version Interaction Rules . . . . . . . . . . . . . . .  18
     8.1.  Minor Version Identifier Transfer Issues  . . . . . . . .  18
     8.2.  Minor Version Compatibility . . . . . . . . . . . . . . .  19
   9.  Correction of Existing Minor Versions and Features  . . . . .  20
     9.1.  XDR Changes to Implement Protocol Corrections . . . . . .  20
     9.2.  XDR Corrections to OPTIONAL Features  . . . . . . . . . .  21
     9.3.  XDR Corrections to REQUIRED Features  . . . . . . . . . .  22
     9.4.  Addressing XDR Corrections in Later Minor Versions  . . .  23
   10. Security Considerations . . . . . . . . . . . . . . . . . . .  24
   11. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  24
   12. References  . . . . . . . . . . . . . . . . . . . . . . . . .  24
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