Network File System (NFS) Direct Data Placement
RFC 5667
Document | Type |
RFC - Proposed Standard
(January 2010; No errata)
Obsoleted by RFC 8267
|
|
---|---|---|---|
Authors | Tom Talpey , Brent Callaghan | ||
Last updated | 2015-10-14 | ||
Stream | IETF | ||
Formats | plain text html pdf htmlized bibtex | ||
Stream | WG state | (None) | |
Document shepherd | No shepherd assigned | ||
IESG | IESG state | RFC 5667 (Proposed Standard) | |
Consensus Boilerplate | Unknown | ||
Telechat date | |||
Responsible AD | Lars Eggert | ||
Send notices to | (None) |
Internet Engineering Task Force (IETF) T. Talpey Request for Comments: 5667 Unaffiliated Category: Standards Track B. Callaghan ISSN: 2070-1721 Apple January 2010 Network File System (NFS) Direct Data Placement Abstract This document defines the bindings of the various Network File System (NFS) versions to the Remote Direct Memory Access (RDMA) operations supported by the RPC/RDMA transport protocol. It describes the use of direct data placement by means of server-initiated RDMA operations into client-supplied buffers for implementations of NFS versions 2, 3, 4, and 4.1 over such an RDMA transport. 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 5741. 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/rfc5667. Copyright Notice Copyright (c) 2010 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. Talpey & Callaghan Standards Track [Page 1] RFC 5667 NFS Direct Data Placement January 2010 This document may contain material from IETF Documents or IETF Contributions published or made publicly available before November 10, 2008. The person(s) controlling the copyright in some of this material may not have granted the IETF Trust the right to allow modifications of such material outside the IETF Standards Process. Without obtaining an adequate license from the person(s) controlling the copyright in such materials, this document may not be modified outside the IETF Standards Process, and derivative works of it may not be created outside the IETF Standards Process, except to format it for publication as an RFC or to translate it into languages other than English. Table of Contents 1. Introduction ....................................................2 1.1. Requirements Language ......................................2 2. Transfers from NFS Client to NFS Server .........................3 3. Transfers from NFS Server to NFS Client .........................3 4. NFS Versions 2 and 3 Mapping ....................................4 5. NFS Version 4 Mapping ...........................................6 5.1. NFS Version 4 Callbacks ....................................7 6. Port Usage Considerations .......................................8 7. Security Considerations .........................................9 8. Acknowledgments .................................................9 9. References ......................................................9 9.1. Normative References .......................................9 9.2. Informative References ....................................10 1. Introduction The Remote Direct Memory Access (RDMA) Transport for Remote Procedure Call (RPC) [RFC5666] allows an RPC client application to post buffers in a Chunk list for specific arguments and results from an RPC call. The RDMA transport header conveys this list of client buffer addresses to the server where the application can associate them with client data and use RDMA operations to transfer the results directly to and from the posted buffers on the client. The client and server must agree on a consistent mapping of posted buffers to RPC. This document details the mapping for each version of the NFS protocol [RFC1094] [RFC1813] [RFC3530] [RFC5661]. 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 [RFC2119]. Talpey & Callaghan Standards Track [Page 2] RFC 5667 NFS Direct Data Placement January 2010Show full document text