From patchwork Tue Feb 28 09:24:50 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "D. Wythe" X-Patchwork-Id: 13154568 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 91D2BC7EE30 for ; Tue, 28 Feb 2023 09:25:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229720AbjB1JZH (ORCPT ); Tue, 28 Feb 2023 04:25:07 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38894 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229565AbjB1JZG (ORCPT ); Tue, 28 Feb 2023 04:25:06 -0500 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F2BFF55A7; Tue, 28 Feb 2023 01:25:03 -0800 (PST) X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R131e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=ay29a033018046056;MF=alibuda@linux.alibaba.com;NM=1;PH=DS;RN=12;SR=0;TI=SMTPD_---0Vcix4w._1677576294; Received: from j66a10360.sqa.eu95.tbsite.net(mailfrom:alibuda@linux.alibaba.com fp:SMTPD_---0Vcix4w._1677576294) by smtp.aliyun-inc.com; Tue, 28 Feb 2023 17:25:00 +0800 From: "D. Wythe" To: kgraul@linux.ibm.com, wenjia@linux.ibm.com, jaka@linux.ibm.com, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org Cc: kuba@kernel.org, davem@davemloft.net, netdev@vger.kernel.org, linux-s390@vger.kernel.org, linux-rdma@vger.kernel.org, bpf@vger.kernel.org Subject: [PATCH bpf-next v3 0/4] net/smc: Introduce BPF injection capability Date: Tue, 28 Feb 2023 17:24:50 +0800 Message-Id: <1677576294-33411-1-git-send-email-alibuda@linux.alibaba.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: "D. Wythe" This patches attempt to introduce BPF injection capability for SMC, and add selftest to ensure code stability. As we all know that the SMC protocol is not suitable for all scenarios, especially for short-lived. However, for most applications, they cannot guarantee that there are no such scenarios at all. Therefore, apps may need some specific strategies to decide shall we need to use SMC or not, for example, apps can limit the scope of the SMC to a specific IP address or port. Based on the consideration of transparent replacement, we hope that apps can remain transparent even if they need to formulate some specific strategies for SMC using. That is, do not need to recompile their code. On the other hand, we need to ensure the scalability of strategies implementation. Although it is simple to use socket options or sysctl, it will bring more complexity to subsequent expansion. Fortunately, BPF can solve these concerns very well, users can write thire own strategies in eBPF to choose whether to use SMC or not. And it's quite easy for them to modify their strategies in the future. This patches implement injection capability for SMC via struct_ops. In that way, we can add new injection scenarios in the future. v3 -> v2: 1. fix checkpatch error and warning. 2. split patch for better review. 3. enhance selftest to cover more scenarios. v2 -> v1: 1. fix compile error and warning. D. Wythe (4): net/smc: move smc_sock related structure definition bpf: add SMC support in BPF struct_ops net/smc: add BPF injection on smc negotiation bpf/selftests: add selftest for SMC bpf capability include/linux/btf_ids.h | 12 + include/net/smc.h | 248 ++++++++++++++++++ kernel/bpf/bpf_struct_ops_types.h | 4 + net/Makefile | 5 + net/smc/af_smc.c | 15 +- net/smc/bpf_smc_struct_ops.c | 148 +++++++++++ net/smc/smc.h | 224 ---------------- tools/testing/selftests/bpf/prog_tests/bpf_smc.c | 37 +++ tools/testing/selftests/bpf/progs/bpf_smc.c | 320 +++++++++++++++++++++++ 9 files changed, 788 insertions(+), 225 deletions(-) create mode 100644 net/smc/bpf_smc_struct_ops.c create mode 100644 tools/testing/selftests/bpf/prog_tests/bpf_smc.c create mode 100644 tools/testing/selftests/bpf/progs/bpf_smc.c