From mboxrd@z Thu Jan 1 00:00:00 1970 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=-3.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 84FEFC33C9E for ; Tue, 7 Jan 2020 13:03:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 64A072080A for ; Tue, 7 Jan 2020 13:03:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728066AbgAGNDe (ORCPT ); Tue, 7 Jan 2020 08:03:34 -0500 Received: from mx2.suse.de ([195.135.220.15]:35632 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726937AbgAGNDe (ORCPT ); Tue, 7 Jan 2020 08:03:34 -0500 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx2.suse.de (Postfix) with ESMTP id 48252B089; Tue, 7 Jan 2020 13:03:32 +0000 (UTC) From: Michal Rostecki To: bpf@vger.kernel.org Cc: Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , Quentin Monnet , Stanislav Fomichev , Jakub Kicinski , Prashant Bhole , Peter Wu , netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH bpf-next v2 0/2] bpftool/libbpf: Add probe for large INSN limit Date: Tue, 7 Jan 2020 14:03:04 +0100 Message-Id: <20200107130308.20242-1-mrostecki@opensuse.org> X-Mailer: git-send-email 2.16.4 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series implements a new BPF feature probe which checks for the commit c04c0d2b968a ("bpf: increase complexity limit and maximum program size"), which increases the maximum program size to 1M. It's based on the similar check in Cilium, although Cilium is already aiming to use bpftool checks and eventually drop all its custom checks. Examples of outputs: # bpftool feature probe [...] Scanning miscellaneous eBPF features... Large complexity limit and maximum program size (1M) is available # bpftool feature probe macros [...] /*** eBPF misc features ***/ #define HAVE_HAVE_LARGE_INSN_LIMIT # bpftool feature probe -j | jq '.["misc"]' { "have_large_insn_limit": true } v1 -> v2: - Test for 'BPF_MAXINSNS + 1' number of total insns. - Remove info about the current 1M limit from probe's description. Michal Rostecki (2): libbpf: Add probe for large INSN limit bpftool: Add misc secion and probe for large INSN limit tools/bpf/bpftool/feature.c | 18 ++++++++++++++++++ tools/lib/bpf/libbpf.h | 1 + tools/lib/bpf/libbpf.map | 1 + tools/lib/bpf/libbpf_probes.c | 21 +++++++++++++++++++++ 4 files changed, 41 insertions(+) -- 2.16.4