From patchwork Tue Jul 13 06:20:07 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Kerr X-Patchwork-Id: 477363 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3D130C07E96 for ; Tue, 13 Jul 2021 06:27:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 25B8F60FF2 for ; Tue, 13 Jul 2021 06:27:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234150AbhGMGaX (ORCPT ); Tue, 13 Jul 2021 02:30:23 -0400 Received: from pi.codeconstruct.com.au ([203.29.241.158]:59288 "EHLO codeconstruct.com.au" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233852AbhGMGaP (ORCPT ); Tue, 13 Jul 2021 02:30:15 -0400 Received: by codeconstruct.com.au (Postfix, from userid 10000) id B7DF121436; Tue, 13 Jul 2021 14:21:34 +0800 (AWST) From: Jeremy Kerr To: netdev@vger.kernel.org Cc: Matt Johnston , Andrew Jeffery Subject: [PATCH RFC net-next v2 00/16] Add Management Component Transport Protocol support Date: Tue, 13 Jul 2021 14:20:07 +0800 Message-Id: <20210713062023.3286895-1-jk@codeconstruct.com.au> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This (RFC) series adds core MCTP support to the kernel. From the Kconfig description: Management Component Transport Protocol (MCTP) is an in-system protocol for communicating between management controllers and their managed devices (peripherals, host processors, etc.). The protocol is defined by DMTF specification DSP0236. This option enables core MCTP support. For communicating with other devices, you'll want to enable a driver for a specific hardware channel. This implementation allows a sockets-based API for sending and receiving MCTP messages via sendmsg/recvmsg on SOCK_DGRAM sockets. Kernel stack control is all via netlink, using existing RTM_* messages. The userspace ABI change is fairly small; just the necessary AF_/ETH_P_/ARPHDR_ constants, a new sockaddr, and a new netlink attribute. For MAINTAINERS, I've just included netdev@ as the list entry. I'm happy to alter this based on preferences here - an alternative would be the OpenBMC list (the main user of the MCTP interface), or we can create a new list entirely. We have a couple of interface drivers almost ready to go at the moment, but those can wait until the core code has some review. Review, comments, questions etc. are most welcome. Cheers, Jeremy v2: - change wording to match spec terminology: controller -> component - require specific capabilities for bind() & sendmsg() - add address and tag defintions to uapi - add selinux AF_MCTP table definitions - remove strict cflags; warnings are present in common headers - limit maximum reassembly size Jeremy Kerr (10): mctp: Add MCTP base mctp: Add base socket/protocol definitions mctp: Add base packet definitions mctp: Add sockaddr_mctp to uapi mctp: Add initial driver infrastructure mctp: Add device handling and netlink interface mctp: Add initial routing framework mctp: Populate socket implementation mctp: Implement message fragmentation & reassembly mctp: Add MCTP overview document Matt Johnston (6): mctp: Add netlink route management mctp: Add neighbour implementation mctp: Add neighbour netlink interface mctp: Add dest neighbour lladdr to route output mctp: Allow per-netns default networks mctp: Allow MCTP on tun devices Documentation/networking/index.rst | 1 + Documentation/networking/mctp.rst | 213 ++++++ MAINTAINERS | 12 + drivers/net/Kconfig | 2 + drivers/net/Makefile | 1 + drivers/net/mctp/Kconfig | 8 + drivers/net/mctp/Makefile | 0 include/linux/netdevice.h | 3 + include/linux/socket.h | 6 +- include/net/mctp.h | 235 ++++++ include/net/mctpdevice.h | 42 ++ include/net/net_namespace.h | 4 + include/net/netns/mctp.h | 36 + include/uapi/linux/if_arp.h | 1 + include/uapi/linux/if_ether.h | 3 + include/uapi/linux/if_link.h | 10 + include/uapi/linux/mctp.h | 36 + net/Kconfig | 1 + net/Makefile | 1 + net/mctp/Kconfig | 13 + net/mctp/Makefile | 3 + net/mctp/af_mctp.c | 396 ++++++++++ net/mctp/device.c | 370 +++++++++ net/mctp/neigh.c | 342 +++++++++ net/mctp/route.c | 1086 +++++++++++++++++++++++++++ security/selinux/hooks.c | 4 +- security/selinux/include/classmap.h | 4 +- 27 files changed, 2830 insertions(+), 3 deletions(-) create mode 100644 Documentation/networking/mctp.rst create mode 100644 drivers/net/mctp/Kconfig create mode 100644 drivers/net/mctp/Makefile create mode 100644 include/net/mctp.h create mode 100644 include/net/mctpdevice.h create mode 100644 include/net/netns/mctp.h create mode 100644 include/uapi/linux/mctp.h create mode 100644 net/mctp/Kconfig create mode 100644 net/mctp/Makefile create mode 100644 net/mctp/af_mctp.c create mode 100644 net/mctp/device.c create mode 100644 net/mctp/neigh.c create mode 100644 net/mctp/route.c