RDMA Protocol Extensions
draft-ietf-storm-rdmap-ext-02

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Storage Maintenance (storm) Working Group                    Hemal Shah
Internet Draft                                     Broadcom Corporation
Intended status: Standards Track                            Felix Marti
Expires: July 2012                                      Wael Noureddine
                                                       Asgeir Eiriksson
                                            Chelsio Communications, Inc.
                                                           Robert Sharp
                                                      Intel Corporation
                                                        January 9, 2012

                         RDMA Protocol Extensions
                     draft-ietf-storm-rdmap-ext-02.txt

Status of this Memo

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

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   This Internet-Draft will expire on July 9, 2012.

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   Copyright (c) 2012 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
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   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
   2. Requirements Language..........................................3
   3. Glossary.......................................................3
   4. Header Format Extensions.......................................5
      4.1. RDMAP Control and Invalidate STag Fields..................5
      4.2. RDMA Message Definitions..................................6
   5. Atomic Operations..............................................7
      5.1. Atomic Operation Details..................................8
         5.1.1. FetchAdd.............................................8
         5.1.2. Swap.................................................9
         5.1.3. CmpSwap.............................................10
      5.2. Atomic Operations........................................11
         5.2.1. Atomic Operation Request Message....................12
         5.2.2. Atomic Operation Response Message...................15
      5.3. Atomicity Guarantees.....................................17
      5.4. Atomic Operations Ordering and Completion Rules..........17
   6. Immediate Data................................................18
      6.1. RDMAP Interactions with ULP for Immediate Data...........18
      6.2. Immediate Data Header Format.............................18
      6.3. Immediate Data or Immediate Data with SE Message.........19
      6.4. Ordering and Completions.................................20
   7. Ordering and Completions Table................................20
   8. Error Processing..............................................23
      8.1. Errors Detected at the Local Peer........................23
      8.2. Errors Detected at the Remote Peer.......................24

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   9. Security Considerations.......................................24
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