Internationalization for the NFSv4 Protocols
draft-dnoveck-nfsv4-internationalization-02

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NFSv4                                                          D. Noveck
Internet-Draft                                                    NetApp
Updates: 5661, 7530 (if approved)                      September 6, 2020
Intended status: Standards Track
Expires: March 10, 2021

              Internationalization for the NFSv4 Protocols
              draft-dnoveck-nfsv4-internationalization-02

Abstract

   This document describes the handling of internationalization for all
   NFSv4 protocols, including NFSv4.0, NFSv4.1, NFSv4.2 and extensions
   thereof, and future minor versions.

   It updates RFC7530 and RFC5661.

Status of This Memo

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   This Internet-Draft will expire on March 10, 2021.

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

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Noveck                   Expires March 10, 2021                 [Page 1]
Internet-Draft          NFSv4 Inernationalization         September 2020

   the Trust Legal Provisions and are provided without warranty as
   described in the Simplified BSD License.

Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   3
   2.  Requirements Language . . . . . . . . . . . . . . . . . . . .   4
     2.1.  Requirements Language Definition  . . . . . . . . . . . .   4
     2.2.  Requirements Language Derivation  . . . . . . . . . . . .   4
   3.  History . . . . . . . . . . . . . . . . . . . . . . . . . . .   6
   4.  Changes Relative to RFC7530 . . . . . . . . . . . . . . . . .  11
   5.  Limitations on Internationalization-Related Processing in the
       NFSv4 Context . . . . . . . . . . . . . . . . . . . . . . . .  11
   6.  Summary of Server Behavior Types  . . . . . . . . . . . . . .  12
   7.  The Attribute Fs_charset_cap  . . . . . . . . . . . . . . . .  13
     7.1.  The Attribute Fs_charset_cap in Published NFSv4.1
           Specifications  . . . . . . . . . . . . . . . . . . . . .  14
     7.2.  The Attribute Fs_charset_cap in Future NFSv4.1
           Specifications  . . . . . . . . . . . . . . . . . . . . .  16
   8.  String Encoding . . . . . . . . . . . . . . . . . . . . . . .  18
   9.  Normalization . . . . . . . . . . . . . . . . . . . . . . . .  19
   10. Case-Insensitive Processing of File Names . . . . . . . . . .  19
     10.1.  Implementing Case-Insensitive Comparison of File Names .  23
     10.2.  Important Examples of Case-insensitive Handling of File
            Names  . . . . . . . . . . . . . . . . . . . . . . . . .  25
   11. Internationalization-related Processing of File Names by
       Clients . . . . . . . . . . . . . . . . . . . . . . . . . . .  28
     11.1.  Server Restrictions to Deal with Lack of Client
            Knowledge  . . . . . . . . . . . . . . . . . . . . . . .  29
     11.2.  Client Processing of File Names for Current NFSv4
            Protocols  . . . . . . . . . . . . . . . . . . . . . . .  30
     11.3.  Client Processing of File Names for Future NFSv4
            Protocols  . . . . . . . . . . . . . . . . . . . . . . .  34
   12. String Types with Processing Defined by Other Internet Areas   35
     12.1.  Effect of IDNA Changes . . . . . . . . . . . . . . . . .  37
     12.2.  Potential Compatibility Issues Related to IDNA Changes .  38
   13. Errors Related to UTF-8 . . . . . . . . . . . . . . . . . . .  40
   14. Servers That Accept File Component Names That Are Not Valid
       UTF-8 Strings . . . . . . . . . . . . . . . . . . . . . . . .  41
   15. Future Minor Versions and Extensions  . . . . . . . . . . . .  42
   16. IANA Considerations . . . . . . . . . . . . . . . . . . . . .  43
   17. Security Considerations . . . . . . . . . . . . . . . . . . .  43
   18. References  . . . . . . . . . . . . . . . . . . . . . . . . .  44