Storage Maintenance (storm) Working Group Hemal Shah
Internet Draft Broadcom Corporation
Intended status: Standards Track Felix Marti
Expires: July 2013 Wael Noureddine
Asgeir Eiriksson
Chelsio Communications, Inc.
Robert Sharp
Intel Corporation
January 9, 2013
RDMA Protocol Extensions
draft-ietf-storm-rdmap-ext-04.txt
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Internet-Draft RDMA Protocol Extensions January 2013
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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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