From patchwork Fri Jun 19 22:57:16 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Bianconi X-Patchwork-Id: 217502 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=-9.1 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable 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 5CDE0C433DF for ; Fri, 19 Jun 2020 22:57:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 365802240A for ; Fri, 19 Jun 2020 22:57:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592607470; bh=3ZTl+A/Kacpq2EA0Kulq1UyudM0GeuQ/Ht1E3auto+w=; h=From:To:Cc:Subject:Date:List-ID:From; b=MGTtndfr4c5t/6qZdwtgkcoECXaXjTjV/nTG2X5i+BpC4Nm0Lm+1n/P8cQDDfN3oB F8wGUi2HPQxrEYgjkFjU4WeyXh1YbPILTpmN9/6hZ/ptj+bTd+S/zu2jT4Yu1CEDHq u87NU97saQtsZ6kSgcJXQ80zRYLLtdMa76TaPezw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730166AbgFSW5s (ORCPT ); Fri, 19 Jun 2020 18:57:48 -0400 Received: from mail.kernel.org ([198.145.29.99]:53236 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730154AbgFSW5o (ORCPT ); Fri, 19 Jun 2020 18:57:44 -0400 Received: from localhost.localdomain.com (unknown [151.48.138.186]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id CED4F21D7D; Fri, 19 Jun 2020 22:57:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592607463; bh=3ZTl+A/Kacpq2EA0Kulq1UyudM0GeuQ/Ht1E3auto+w=; h=From:To:Cc:Subject:Date:From; b=DOZgSg/spKDM3Zz1thY8RJMn/BJUwXPDZukfdMYGZf/31Q6WJJb1y034UyB4Ps8pV 5O4up5g44OYM4VyTdApQgkVRwlGYInqe3aWafBGGthacRsOGoR0wn3e7f3hPZnFwtW 4o6XQxFxilD3zcT5egN5eEMmFJjoAg9lbclo6CUg= From: Lorenzo Bianconi To: bpf@vger.kernel.org, netdev@vger.kernel.org Cc: davem@davemloft.net, ast@kernel.org, brouer@redhat.com, daniel@iogearbox.net, toke@redhat.com, lorenzo.bianconi@redhat.com, dsahern@kernel.org Subject: [PATCH v2 bpf-next 0/8] introduce support for XDP programs in CPUMAP Date: Sat, 20 Jun 2020 00:57:16 +0200 Message-Id: X-Mailer: git-send-email 2.26.2 MIME-Version: 1.0 Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Similar to what David Ahern proposed in [1] for DEVMAPs, introduce the capability to attach and run a XDP program to CPUMAP entries. The idea behind this feature is to add the possibility to define on which CPU run the eBPF program if the underlying hw does not support RSS. I respin patch 1/6 from a previous series sent by David [2]. The functionality has been tested on Marvell Espressobin, i40e and mlx5. Detailed tests results can be found here: https://github.com/xdp-project/xdp-project/blob/master/areas/cpumap/cpumap04-map-xdp-prog.org Changes since v1: - added performance test results - added kselftest support - fixed memory accounting with page_pool - extended xdp_redirect_cpu_user.c to load an external program to perform redirect - reported ifindex to attached eBPF program - moved bpf_cpumap_val definition to include/uapi/linux/bpf.h [1] https://patchwork.ozlabs.org/project/netdev/cover/20200529220716.75383-1-dsahern@kernel.org/ [2] https://patchwork.ozlabs.org/project/netdev/patch/20200513014607.40418-2-dsahern@kernel.org/ David Ahern (1): net: Refactor xdp_convert_buff_to_frame Lorenzo Bianconi (7): samples/bpf: xdp_redirect_cpu_user: do not update bpf maps in option loop cpumap: formalize map value as a named struct bpf: cpumap: add the possibility to attach an eBPF program to cpumap bpf: cpumap: implement XDP_REDIRECT for eBPF programs attached to map entries libbpf: add SEC name for xdp programs attached to CPUMAP samples/bpf: xdp_redirect_cpu: load a eBPF program on cpumap selftest: add tests for XDP programs in CPUMAP entries include/linux/bpf.h | 6 + include/net/xdp.h | 41 ++-- include/trace/events/xdp.h | 16 +- include/uapi/linux/bpf.h | 14 ++ kernel/bpf/cpumap.c | 161 +++++++++++--- net/core/dev.c | 8 + samples/bpf/xdp_redirect_cpu_kern.c | 25 ++- samples/bpf/xdp_redirect_cpu_user.c | 208 ++++++++++++++++-- tools/include/uapi/linux/bpf.h | 14 ++ tools/lib/bpf/libbpf.c | 2 + .../bpf/prog_tests/xdp_cpumap_attach.c | 70 ++++++ .../bpf/progs/test_xdp_with_cpumap_helpers.c | 38 ++++ 12 files changed, 531 insertions(+), 72 deletions(-) create mode 100644 tools/testing/selftests/bpf/prog_tests/xdp_cpumap_attach.c create mode 100644 tools/testing/selftests/bpf/progs/test_xdp_with_cpumap_helpers.c