NFS version 4 Protocol
RFC 3010
| Document | Type |
RFC - Proposed Standard
(December 2000; Errata)
Obsoleted by RFC 3530
Was draft-ietf-nfsv4 (nfsv4 WG)
|
|
|---|---|---|---|
| Authors | Carl Beame , David Robinson , Brent Callaghan , David Noveck , Robert Thurlow , Mike Eisler , Spencer Shepler | ||
| Last updated | 2020-01-21 | ||
| Stream | Internent Engineering Task Force (IETF) | ||
| Formats | plain text html pdf htmlized (tools) htmlized with errata bibtex | ||
| Stream | WG state | (None) | |
| Document shepherd | No shepherd assigned | ||
| IESG | IESG state | RFC 3010 (Proposed Standard) | |
| Consensus Boilerplate | Unknown | ||
| Telechat date | |||
| Responsible AD | (None) | ||
| Send notices to | (None) | ||
Network Working Group S. Shepler
Request for Comments: 3010 B. Callaghan
Obsoletes: 1813, 1094 D. Robinson
Category: Standards Track R. Thurlow
Sun Microsystems Inc.
C. Beame
Hummingbird Ltd.
M. Eisler
Zambeel, Inc.
D. Noveck
Network Appliance, Inc.
December 2000
NFS version 4 Protocol
Status of this Memo
This document specifies an Internet standards track protocol for the
Internet community, and requests discussion and suggestions for
improvements. Please refer to the current edition of the "Internet
Official Protocol Standards" (STD 1) for the standardization state
and status of this protocol. Distribution of this memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2000). All Rights Reserved.
Abstract
NFS (Network File System) version 4 is a distributed file system
protocol which owes heritage to NFS protocol versions 2 [RFC1094] and
3 [RFC1813]. Unlike earlier versions, the NFS version 4 protocol
supports traditional file access while integrating support for file
locking and the mount protocol. In addition, support for strong
security (and its negotiation), compound operations, client caching,
and internationalization have been added. Of course, attention has
been applied to making NFS version 4 operate well in an Internet
environment.
Key Words
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.
Shepler, et al. Standards Track [Page 1]
RFC 3010 NFS version 4 Protocol December 2000
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1. Overview of NFS Version 4 Features . . . . . . . . . . . . 6
1.1.1. RPC and Security . . . . . . . . . . . . . . . . . . . . 6
1.1.2. Procedure and Operation Structure . . . . . . . . . . . 7
1.1.3. File System Model . . . . . . . . . . . . . . . . . . . 8
1.1.3.1. Filehandle Types . . . . . . . . . . . . . . . . . . . 8
1.1.3.2. Attribute Types . . . . . . . . . . . . . . . . . . . 8
1.1.3.3. File System Replication and Migration . . . . . . . . 9
1.1.4. OPEN and CLOSE . . . . . . . . . . . . . . . . . . . . . 9
1.1.5. File locking . . . . . . . . . . . . . . . . . . . . . . 9
1.1.6. Client Caching and Delegation . . . . . . . . . . . . . 10
1.2. General Definitions . . . . . . . . . . . . . . . . . . . 11
2. Protocol Data Types . . . . . . . . . . . . . . . . . . . . 12
2.1. Basic Data Types . . . . . . . . . . . . . . . . . . . . . 12
2.2. Structured Data Types . . . . . . . . . . . . . . . . . . 14
3. RPC and Security Flavor . . . . . . . . . . . . . . . . . . 18
3.1. Ports and Transports . . . . . . . . . . . . . . . . . . . 18
3.2. Security Flavors . . . . . . . . . . . . . . . . . . . . . 18
3.2.1. Security mechanisms for NFS version 4 . . . . . . . . . 19
3.2.1.1. Kerberos V5 as security triple . . . . . . . . . . . . 19
3.2.1.2. LIPKEY as a security triple . . . . . . . . . . . . . 19
3.2.1.3. SPKM-3 as a security triple . . . . . . . . . . . . . 20
3.3. Security Negotiation . . . . . . . . . . . . . . . . . . . 21
3.3.1. Security Error . . . . . . . . . . . . . . . . . . . . . 21
3.3.2. SECINFO . . . . . . . . . . . . . . . . . . . . . . . . 21
3.4. Callback RPC Authentication . . . . . . . . . . . . . . . 22
4. Filehandles . . . . . . . . . . . . . . . . . . . . . . . . 23
4.1. Obtaining the First Filehandle . . . . . . . . . . . . . . 24
4.1.1. Root Filehandle . . . . . . . . . . . . . . . . . . . . 24
4.1.2. Public Filehandle . . . . . . . . . . . . . . . . . . . 24
4.2. Filehandle Types . . . . . . . . . . . . . . . . . . . . . 25
4.2.1. General Properties of a Filehandle . . . . . . . . . . . 25
4.2.2. Persistent Filehandle . . . . . . . . . . . . . . . . . 26
4.2.3. Volatile Filehandle . . . . . . . . . . . . . . . . . . 26
4.2.4. One Method of Constructing a Volatile Filehandle . . . . 28
4.3. Client Recovery from Filehandle Expiration . . . . . . . . 28
5. File Attributes . . . . . . . . . . . . . . . . . . . . . . 29
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