RFC 1813 (rfc1813) - Page 3 of 127

NFS Version 3 Protocol Specification

Alternative Format: Original Text Document
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RFC 1813                 NFS Version 3 Protocol                June 1995


   5.2.5     EXPORT: Return export list . . . . . . . . . . . . . . 113
   6.    Appendix II: Lock manager protocol . . . . . . . . . . . . 114
   6.1     RPC Information  . . . . . . . . . . . . . . . . . . . . 114
   6.1.1     Authentication . . . . . . . . . . . . . . . . . . . . 114
   6.1.2     Constants  . . . . . . . . . . . . . . . . . . . . . . 114
   6.1.3     Transport Address  . . . . . . . . . . . . . . . . . . 115
   6.1.4     Basic Data Types . . . . . . . . . . . . . . . . . . . 115
   6.2     NLM Procedures . . . . . . . . . . . . . . . . . . . . . 118
   6.2.0     NULL: Do nothing . . . . . . . . . . . . . . . . . . . 120
   6.3     Implementation issues  . . . . . . . . . . . . . . . . . 120
   6.3.1     64-bit offsets and lengths . . . . . . . . . . . . . . 120
   6.3.2     File handles . . . . . . . . . . . . . . . . . . . . . 120
   7.    Appendix III: Bibliography . . . . . . . . . . . . . . . . 122
   8.    Security Considerations  . . . . . . . . . . . . . . . . . 125
   9.    Acknowledgements . . . . . . . . . . . . . . . . . . . . . 125
   10.   Authors' Addresses . . . . . . . . . . . . . . . . . . . . 126

1. Introduction

   Sun's NFS protocol provides transparent remote access to shared
   file systems across networks. The NFS protocol is designed to be
   machine, operating system, network architecture, and transport
   protocol independent. This independence is achieved through the
   use of Remote Procedure Call (RPC) primitives built on top of an
   eXternal Data Representation (XDR).  Implementations of the NFS
   version 2 protocol exist for a variety of machines, from personal
   computers to supercomputers. The initial version of the NFS
   protocol is specified in the Network File System Protocol
   Specification [RFC 1094]. A description of the initial
   implementation can be found in [Sandberg].

   The supporting MOUNT protocol performs the operating
   system-specific functions that allow clients to attach remote
   directory trees to a point within the local file system. The
   mount process also allows the server to grant remote access
   privileges to a restricted set of clients via export control.

   The Lock Manager provides support for file locking when used in
   the NFS environment. The Network Lock Manager (NLM) protocol
   isolates the inherently stateful aspects of file locking into a
   separate protocol.

   A complete description of the above protocols and their
   implementation is to be found in [X/OpenNFS].

   The purpose of this document is to:





Callaghan, el al             Informational
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