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=-8.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS 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 87DAFC433E1 for ; Wed, 31 Mar 2021 03:29:33 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6173361927 for ; Wed, 31 Mar 2021 03:29:33 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233455AbhCaD3B (ORCPT ); Tue, 30 Mar 2021 23:29:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44312 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233305AbhCaD2p (ORCPT ); Tue, 30 Mar 2021 23:28:45 -0400 Received: from mail-ot1-x330.google.com (mail-ot1-x330.google.com [IPv6:2607:f8b0:4864:20::330]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9047BC061574 for ; Tue, 30 Mar 2021 20:28:45 -0700 (PDT) Received: by mail-ot1-x330.google.com with SMTP id k14-20020a9d7dce0000b02901b866632f29so17700143otn.1 for ; Tue, 30 Mar 2021 20:28:45 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20150623.gappssmtp.com; s=20150623; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=YWqkHkXqjSSpodeGyf6JoDbRT3UAWqUxwXE4RX9bUXI=; b=Q1zGQHPl17buzrLUEgHFv2N82ENzftfFVy11LyG1DG+k9g1MY4Apy9TypTmcYZmFbE YK9aXi39PjeFM15QOYXGKxYDMGIR50i8SqQPlvA2/k+UBewWHiv8qpi2sXdG5h4eSGDO lkEoPINuszjJDJdzc1iNBUfm11AoTHWY19NJOQlIFYCyb4m4xn2lfgjLoh0qmOy20FSo JJM/C2A1supCIUox5qZ+ymU3HtDVh/6hcMzfXMVrWO8Fut+Y8/YWCt1Jloau1LWZRw7S z3ZFbvY+er7m2TExqcTD5trBTizCB05KaRh9JXdXJnI7z2WRMsR4ku541p5ycX7N4aWF T54Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=YWqkHkXqjSSpodeGyf6JoDbRT3UAWqUxwXE4RX9bUXI=; b=ZvjWy3+4bTQrhyzzvYw0ULM9b0uK8RPaHFifpztyrENn5u/14NAKKTTb8Khcxs9YI/ T9bvAqaIYvXhnzzNzi6J293wp0orMO8FSwFBr5S62n6fMgE4q/lh4wOGn4nf7Ty1fQ8D s4QILKlgegOESKpf7FEyHmefvgso0Up50Tpq93HzZKe6FK9IpRWHahTeOHJKp+XJCPUB 4EO6zz0D/ck0UwLzFPOoqtjH2/fWHQUHujtKpy+6ulqUU9q0aCAqxNO4BVpLqZuK/J7o ug8UX79aVHVzJ76/AqfKiZK5nomA2gLFKVVsmsjnz283h3witY3EllVAP5MmePHDae+G COMQ== X-Gm-Message-State: AOAM5319+GOn5utfgWbHaV3rxE6cEfWHq7y6ffc36s9Nq6NfCtGFmpQ2 +swGcfkYRQxeQhpYNPGb2FD2Y7gwtEpP43FdllAS0g== X-Google-Smtp-Source: ABdhPJzNDct2q5HLdhRjukH0jQt589qOnFQULvOQC8gYu/dXe8bQc1tXVdTzJgKLEew/j4BSIaVXho7vv/9CrSQi4PA= X-Received: by 2002:a9d:5d0a:: with SMTP id b10mr920324oti.180.1617161325029; Tue, 30 Mar 2021 20:28:45 -0700 (PDT) MIME-Version: 1.0 References: <20210325015124.1543397-1-kafai@fb.com> <20210330214301.ssskul54hyh67o77@kafai-mbp.dhcp.thefacebook.com> In-Reply-To: <20210330214301.ssskul54hyh67o77@kafai-mbp.dhcp.thefacebook.com> From: "Jiang Wang ." Date: Tue, 30 Mar 2021 20:28:34 -0700 Message-ID: Subject: Re: [External] Re: [PATCH v2 bpf-next 00/14] bpf: Support calling kernel function To: Martin KaFai Lau Cc: Cong Wang , Alexei Starovoitov , Lorenz Bauer , bpf , Alexei Starovoitov , Daniel Borkmann , Kernel Team , Networking Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org Hi Martin, I am working with Cong to get Clang/LLVM-13 to test. But I am confused whether CLANG/LLVM-13 is released or not. >From https://apt.llvm.org/ , I saw llvm-13 was released in Feb, but it does not have the diff you mentioned. >From the following links, I am not sure if LLVM-13 was really released or still in the process. https://llvm.org/docs/ReleaseNotes.html#external-open-source-projects-using-llvm-13 https://github.com/llvm/llvm-project/releases Did I miss something? Where could I get a good clang/llvm-13 ? Or maybe clang-14? Thanks Regards, Jiang On Tue, Mar 30, 2021 at 2:43 PM Martin KaFai Lau wrote: > > On Tue, Mar 30, 2021 at 12:58:22PM -0700, Cong Wang wrote: > > On Tue, Mar 30, 2021 at 7:36 AM Alexei Starovoitov > > wrote: > > > > > > On Tue, Mar 30, 2021 at 2:43 AM Lorenz Bauer wrote: > > > > > > > > On Thu, 25 Mar 2021 at 01:52, Martin KaFai Lau wrote: > > > > > > > > > > This series adds support to allow bpf program calling kernel function. > > > > > > > > I think there are more build problems with this. Has anyone hit this before? > > > > > > > > $ CLANG=clang-12 O=../kbuild/vm ./tools/testing/selftests/bpf/vmtest.sh -j 7 > > > > > > > > GEN-SKEL [test_progs-no_alu32] bind6_prog.skel.h > > > > libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1 > > > > GEN-SKEL [test_progs-no_alu32] bind_perm.skel.h > > > > libbpf: elf: skipping unrecognized data section(5) .rodata.str1.1 > > > > GEN-SKEL [test_progs-no_alu32] bpf_cubic.skel.h > > > > GEN-SKEL [test_progs-no_alu32] bpf_dctcp.skel.h > > > > GEN-SKEL [test_progs-no_alu32] bpf_flow.skel.h > > > > libbpf: failed to find BTF for extern 'tcp_cong_avoid_ai' [27] section: -2 > > > > Error: failed to open BPF object file: No such file or directory > > > > > > The doc update is on its way: > > > https://patchwork.kernel.org/project/netdevbpf/patch/20210330054156.2933804-1-kafai@fb.com/ > > > > We just updated our clang to 13, and I still get the same error above. > Please check if the llvm/clang has this diff > https://reviews.llvm.org/D93563