From patchwork Thu May 23 20:53:37 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mykyta Yatsenko mykyta.yatsenko5@gmail.com X-Patchwork-Id: 13672268 X-Patchwork-Delegate: bpf@iogearbox.net Received: from mail-lj1-f181.google.com (mail-lj1-f181.google.com [209.85.208.181]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 03C6984FB1 for ; Thu, 23 May 2024 20:53:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.181 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716497631; cv=none; b=NfW2Js54ArRo/2oxalS04xe6qRRN2bAjZitvwC51U/ZuBkRznrCD5rw34mRtyndFEjZZ+GhXPSa8Q49k+JywqnyWNmZSd3juobJnSkBpourgVv2+gdpTQHhIphPqm7sZXAKZGvhFt2Acnad57dIrG0/UnvSZ8+ZFqfOGG4zjSHU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1716497631; c=relaxed/simple; bh=ss3JtrMhosGvm+4ic1huq/MW0DeyeugcAZhDIMSSSRY=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=GSsH/cXyqXEt6GXfG+dQ092PaoxKcsV3xmxzVOFI2Ln58zScyaSE+EzpxS0xjtbsGQecRFhQacnNUWySLxGBj58uHM0A6bmTg/DebMw2x9sFaUZjoKPG1Dcr/6dylHQpjHlMHUk8ECMIkDqBo1L0GXfQUyHszgp32bEw3QhgcRM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com; spf=pass smtp.mailfrom=gmail.com; arc=none smtp.client-ip=209.85.208.181 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-lj1-f181.google.com with SMTP id 38308e7fff4ca-2e95a7622cfso1979951fa.2 for ; Thu, 23 May 2024 13:53:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716497628; x=1717102428; 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=5YK3PrwXXixlX2DnsKKSaolamZJCENyZh6+9FehPXCc=; b=Dlwx1kthKnuGC6e46R4+2V9YJqcUHFbeA3Xt9/po757fpmwdull+vDl4FTGMLMWCx5 lzdy7D0hZMmfFeO9Iu5LdqFrjo0sJYP6xchgAVIyNXuflODqMO4QCe46ImJDP9BPL4WK hhxgkDUbgBrOqdIWeo+eDQAaaasmLwHh27nLJpUwLSxMlTH2+Y/3D74fB8go+KSdgoeK jjZ17dZ7VOIQs1hHoq4iHSuHAgzTxqHeyDMe3RFRZPgGbh6ffKFP7t4uLb6zLK3oJjkF PyI9g1a/ypGw7XJHHPqFzrx3FSqdIRP/j4GV+r4W5JOyoe3GHD5iucj90jJQMWcRd952 2qKw== X-Gm-Message-State: AOJu0Ywz+Y4NqKOWw4VEyl3jFPp63GA2PfWOHY4QLKwpoKJ9/OdiNcqZ SM7qoskg8eEfToHN+r8QbMd0FstsjYgnZxwB9a8dWdHKiceczAP/GuEx+A== X-Google-Smtp-Source: AGHT+IHQGQiOXSM3NeM9Zz0n8pZRTpuAZssQRGn5euTxjynLxwm5DEJ0TP2n4rfzQ+4APM3ZUBTzZw== X-Received: by 2002:a2e:b003:0:b0:2e7:134d:f79a with SMTP id 38308e7fff4ca-2e95b03e0d8mr1735821fa.10.1716497627853; Thu, 23 May 2024 13:53:47 -0700 (PDT) Received: from yatsenko-fedora-K2202N0103767.thefacebook.com ([2620:10d:c092:500::7:4857]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-578524bb79esm180752a12.92.2024.05.23.13.53.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 May 2024 13:53:47 -0700 (PDT) From: Mykyta Yatsenko mykyta.yatsenko5@gmail.com To: bpf@vger.kernel.org, ast@kernel.org, andrii@kernel.org, daniel@iogearbox.net, kafai@meta.com, kernel-team@meta.com Cc: Mykyta Yatsenko Subject: [PATCH bpf-next] libbpf: configure log verbosity with env variable Date: Thu, 23 May 2024 21:53:37 +0100 Message-ID: <20240523205337.951410-1-yatsenko@meta.com> X-Mailer: git-send-email 2.45.0 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Patchwork-Delegate: bpf@iogearbox.net From: Mykyta Yatsenko Configure logging verbosity by setting LIBBPF_LOG environment variable. Only applying to default logger. Once user set their custom logging callback, it is up to them to filter. Signed-off-by: Mykyta Yatsenko --- tools/lib/bpf/libbpf.c | 18 +++++++++++++++++- 1 file changed, 17 insertions(+), 1 deletion(-) diff --git a/tools/lib/bpf/libbpf.c b/tools/lib/bpf/libbpf.c index 5401f2df463d..8805607073da 100644 --- a/tools/lib/bpf/libbpf.c +++ b/tools/lib/bpf/libbpf.c @@ -229,7 +229,23 @@ static const char * const prog_type_name[] = { static int __base_pr(enum libbpf_print_level level, const char *format, va_list args) { - if (level == LIBBPF_DEBUG) + static enum libbpf_print_level env_level = LIBBPF_INFO; + static bool initialized; + + if (!initialized) { + char *verbosity; + + initialized = true; + verbosity = getenv("LIBBPF_LOG"); + if (verbosity) { + if (strcmp(verbosity, "warn") == 0) + env_level = LIBBPF_WARN; + else if (strcmp(verbosity, "debug") == 0) + env_level = LIBBPF_DEBUG; + } + } + + if (env_level < level) return 0; return vfprintf(stderr, format, args);