Network File System (NFS) Version 4 Minor Version 2 External Data Representation Standard (XDR) Description
RFC 7863

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Internet Engineering Task Force (IETF)                         T. Haynes
Request for Comments: 7863                                  Primary Data
Category: Standards Track                                  November 2016
ISSN: 2070-1721

          Network File System (NFS) Version 4 Minor Version 2
        External Data Representation Standard (XDR) Description

Abstract

   This document provides the External Data Representation (XDR)
   description for NFS version 4 minor version 2.

Status of This Memo

   This is an Internet Standards Track document.

   This document is a product of the Internet Engineering Task Force
   (IETF).  It represents the consensus of the IETF community.  It has
   received public review and has been approved for publication by the
   Internet Engineering Steering Group (IESG).  Further information on
   Internet Standards is available in Section 2 of RFC 7841.

   Information about the current status of this document, any errata,
   and how to provide feedback on it may be obtained at
   http://www.rfc-editor.org/info/rfc7863.

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
   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.

Haynes                       Standards Track                    [Page 1]
RFC 7863                       NFSv4.2 XDR                 November 2016

Table of Contents

   1. Introduction ....................................................2
      1.1. Requirements Language ......................................2
   2. XDR Description of NFSv4.2 ......................................2
   3. Security Considerations ........................................86
   4. IANA Considerations ............................................86
   5. Normative References ...........................................86
   Acknowledgments ...................................................87
   Author's Address ..................................................87

1.  Introduction

   This document contains the External Data Representation (XDR)
   [RFC4506] description of the NFSv4.2 protocol [RFC7862].

1.1.  Requirements Language

   The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
   "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this
   document are to be interpreted as described in RFC 2119 [RFC2119].

2.  XDR Description of NFSv4.2

   In order to facilitate implementations that support all of NFSv4.0,
   NFSv4.1, and NFSv4.2, the description includes operations and other
   features of NFSv4.0 and NFSv4.1 that do not apply to NFSv4.2.  This
   XDR specification is fully compatible with the specification for
   NFSv4.0 [RFC7531], with the exception of the clientaddr4 structure,
   which has been replaced by (strictly, aliased to) netaddr4, which has
   the same members with the same purposes but the names have changed:

       (r_netid -> na_r_netid, r_addr -> na_r_addr)

   This effectively fully reconverges the NFSv4.0 [RFC7531] and NFSv4.1
   [RFC5662] strands of the XDR.

   The XDR description is provided in this document in a way that makes
   it simple for the reader to extract it into a form that is ready to
   compile.  The reader can feed this document in the following shell
   script to produce the machine-readable XDR description of NFSv4.2:

   <CODE BEGINS>

   #!/bin/sh
   grep "^  *///" | sed 's?^  */// ??' | sed 's?^  *///$??'

   <CODE ENDS>

Haynes                       Standards Track                    [Page 2]
RFC 7863                       NFSv4.2 XDR                 November 2016

   That is, if the above script is stored in a file called "extract.sh"
   and this document is in a file called "spec.txt", then the reader
   can do:

   <CODE BEGINS>

    sh extract.sh < spec.txt > nfs4_prot.x

   <CODE ENDS>

   The effect of the script is to remove leading white space from each
   line, plus a sentinel sequence of "///".

   The XDR description, with the sentinel sequence, follows:

   <CODE BEGINS>

   /// /*
   ///  * This file was machine generated for [RFC7862].
   ///  *
   ///  * Last updated Sun Mar 13 10:58:40 PDT 2016
   ///  */
   ///
   /// /*
   ///  * Copyright (c) 2016 IETF Trust and the persons identified
   ///  * as the authors.  All rights reserved.
   ///  *
   ///  * Redistribution and use in source and binary forms, with
   ///  * or without modification, are permitted provided that the
   ///  * following conditions are met: