From nobody Tue Sep 16 15:56:59 2025 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 6EA37C3DA7D for ; Sat, 31 Dec 2022 15:15:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232055AbiLaPPY (ORCPT ); Sat, 31 Dec 2022 10:15:24 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44154 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229842AbiLaPPT (ORCPT ); Sat, 31 Dec 2022 10:15:19 -0500 Received: from mail-pf1-x434.google.com (mail-pf1-x434.google.com [IPv6:2607:f8b0:4864:20::434]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C924C310; Sat, 31 Dec 2022 07:15:18 -0800 (PST) Received: by mail-pf1-x434.google.com with SMTP id a30so496320pfr.6; Sat, 31 Dec 2022 07:15:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=z1dUhnKe7gxJ0QUpJzxtakKCkxVA8FGz20WPR9Jz1/A=; b=Pfsdy4keTpSvVmVxuLNg3r5OP9eykOkfltTBMdPNeiWVWNbSgdh68ebjMbbkbmA3rS Ym56ZntslJpWn+omQpg3lnWStnO5L6Kept6rCqyNP0RtfHjAaF+0P2quWeZtMziPkltA sBvlfEeFyhI+4B09Ht1iLsYQ4veFIxPYk/7t7uItzCgMT3HFc/WQIA7VT0TAYNDkkJGv VgqZGiUpSZCa9g7Lk+o1V7Ar8v1rjyT5fk+jtMbTy75ufNZRKl0u/tCl/9SPbL+7mrWO SaCpkuMSmEKk9l8pXvt8kA5tjWPnp5Z/0AyPvkKNUXckJJq9si3owYvJ9FiM28AK795x mYeQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=z1dUhnKe7gxJ0QUpJzxtakKCkxVA8FGz20WPR9Jz1/A=; b=j8Efpbm2WzfH4nCGfh2Li+aLew9v4XSjfLP3YhHRHS7PWyyypZu/gsZemrM95jZ3gb Dn0zDbhuyFEfBWiN1S3gKMRtD/mSMIIa2syrdap9mP9a85mpzDh/Eoo5gU4rL2DvnqqH R/qQwNgBcAH6uE0k7wQdbshR/0fAcLAezl0d+zaAmzC+m4qY3c6QIr8CytgHi3SPR45c 1DFPjih3vRZkOFxBtmHAa3i15Saf/tIrRYWrSCaulWCBwIXcShOZCVz5paCnksENXCGe JMIYPnfssjmbii0tsHcwtXXxzBjinRJCzFqNPstQjLEgUjS63hPqjMy2sJhBxLbOLl8h h/dA== X-Gm-Message-State: AFqh2ko8amsH4ybileQqVLA5KqQ3S3RsBioX3m6+CIQeKuFpxm8ayjAn 6RrCimd+C1/kdvreGhLZ0Gk= X-Google-Smtp-Source: AMrXdXs3YnXxZr6dG5JSm/x6WvFszUmSOBr+k+fIrvn/yzJzy3QICOwDWoWaupvMdkjeDVOWj7Ydtg== X-Received: by 2002:aa7:9284:0:b0:581:6069:5c00 with SMTP id j4-20020aa79284000000b0058160695c00mr17152838pfa.28.1672499718315; Sat, 31 Dec 2022 07:15:18 -0800 (PST) Received: from WRT-WX9.. ([103.135.103.220]) by smtp.gmail.com with ESMTPSA id a8-20020aa78e88000000b005765a5ff1fasm385992pfr.213.2022.12.31.07.15.13 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 31 Dec 2022 07:15:17 -0800 (PST) From: Changbin Du To: Andrii Nakryiko , Alexei Starovoitov , Daniel Borkmann Cc: Martin KaFai Lau , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , bpf@vger.kernel.org, linux-kernel@vger.kernel.org, Changbin Du , Leo Yan , Andrii Nakryiko Subject: [PATCH] libbpf: Return -ENODATA for missing btf section Date: Sat, 31 Dec 2022 23:14:36 +0800 Message-Id: <20221231151436.6541-1-changbin.du@gmail.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" As discussed before, return -ENODATA (No data available) would be more meaningful than ENOENT (No such file or directory). Suggested-by: Leo Yan Cc: Andrii Nakryiko Signed-off-by: Changbin Du --- tools/lib/bpf/btf.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index dd2badf1a54e..2c89454c0136 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -991,7 +991,7 @@ static struct btf *btf_parse_elf(const char *path, stru= ct btf *base_btf, =20 if (!btf_data) { pr_warn("failed to find '%s' ELF section in %s\n", BTF_ELF_SEC, path); - err =3D -ENOENT; + err =3D -ENODATA; goto done; } btf =3D btf_new(btf_data->d_buf, btf_data->d_size, base_btf); --=20 2.37.2