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RDMA Protocol Extensions
draft-ietf-storm-rdmap-ext-10

Document type: Active Internet-Draft (storm WG)
Document stream: IETF
Last updated: 2014-04-17 (latest revision 2014-04-16)
Intended RFC status: Proposed Standard
Other versions: plain text, pdf, html

IETF State: Submitted to IESG for Publication Oct 2013
Consensus: Unknown
Document shepherd: Tom Talpey
Shepherd Write-Up: Last changed 2014-03-05

IESG State: Approved-announcement sent
IANA Action State: None
Responsible AD: Martin Stiemerling
Send notices to: storm-chairs@tools.ietf.org, draft-ietf-storm-rdmap-ext@tools.ietf.org

Storage Maintenance (storm) Working Group                    Hemal Shah
Internet Draft                                     Broadcom Corporation
Intended status: Standards Track                            Felix Marti
Expires: October 2014                                   Wael Noureddine
                                                       Asgeir Eiriksson
                                            Chelsio Communications, Inc.
                                                           Robert Sharp
                                                      Intel Corporation
                                                         April 16, 2014

                         RDMA Protocol Extensions
                     draft-ietf-storm-rdmap-ext-10.txt

Status of this Memo

   This Internet-Draft is submitted to IETF in full conformance with
   the provisions of BCP 78 and BCP 79.

   Internet-Drafts are working documents of the Internet Engineering
   Task Force (IETF). Note that other groups may also distribute
   working documents as Internet-Drafts. The list of current Internet-
   Drafts is at http://datatracker.ietf.org/drafts/current.

   Internet-Drafts are draft documents valid for a maximum of six
   months and may be updated, replaced, or obsoleted by other documents
   at any time.  It is inappropriate to use Internet-Drafts as
   reference material or to cite them other than as "work in progress."

   This Internet-Draft will expire on October 16, 2014.

Copyright Notice

   Copyright (c) 2014 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

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   Section 4.e of the Trust Legal Provisions and are provided without
   warranty as described in the Simplified BSD License.

Abstract

   This document specifies extensions to the IETF Remote Direct Memory
   Access Protocol (RDMAP RFC5040). RDMAP provides read and write
   services directly to applications and enables data to be transferred
   directly into Upper Layer Protocol (ULP) Buffers without
   intermediate data copies. The extensions specified in this document
   provide the following capabilities and/or improvements: Atomic
   Operations and Immediate Data.

Table of Contents

   1. Introduction...................................................3
      1.1. Discovery of RDMAP Extensions.............................4
   2. Requirements Language..........................................5
   3. Glossary.......................................................5
   4. Header Format Extensions.......................................7
      4.1. RDMAP Control and Invalidate STag Fields..................7
      4.2. RDMA Message Definitions..................................9
   5. Atomic Operations..............................................9
      5.1. Atomic Operation Details.................................11
         5.1.1. FetchAdd............................................11
         5.1.2. CmpSwap.............................................12
      5.2. Atomic Operations........................................14
         5.2.1. Atomic Operation Request Message....................14
         5.2.2. Atomic Operation Response Message...................18
      5.3. Atomicity Guarantees.....................................19
      5.4. Atomic Operations Ordering and Completion Rules..........19
   6. Immediate Data................................................21
      6.1. RDMAP Interactions with ULP for Immediate Data...........21
      6.2. Immediate Data Header Format.............................22
      6.3. Immediate Data or Immediate Data with SE Message.........22
      6.4. Ordering and Completions.................................23
   7. Ordering and Completions Table................................23
   8. Error Processing..............................................26
      8.1. Errors Detected at the Local Peer........................26
      8.2. Errors Detected at the Remote Peer.......................27

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   9. Security Considerations.......................................28

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