From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 78660804 for ; Mon, 5 Jun 2023 08:57:50 +0000 (UTC) Received: from mail-pg1-x52b.google.com (mail-pg1-x52b.google.com [IPv6:2607:f8b0:4864:20::52b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CEAB0F2 for ; Mon, 5 Jun 2023 01:57:48 -0700 (PDT) Received: by mail-pg1-x52b.google.com with SMTP id 41be03b00d2f7-53404873a19so2222726a12.3 for ; Mon, 05 Jun 2023 01:57:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1685955468; x=1688547468; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=FaHv+GqIuupfkrZUyUWk5Q4hx0WfnhqmWCBGMeHIKLU=; b=KeqlD1aRIsDdM6Vqb4akcJ6zcHhsL9ilA7kuJStql37FzHCIKmjFm/Jn+j4TItsmc1 D1Hh8CqYkJk1EViC7NfSnKpn++JEkbeCyx2rPig9TO9bEtL2bAlKJP9EscH77aKClu64 KIKiFbaLoCt+H+FsdyGy0HxP+EbvqlEaTPg0XsTMwsUtE5r3NpyNGXEc88Z1DmDwQKqp jkWG8roq/gVLvo8OPgzQ81+b3x56lbc9+VFsW2e0ikjQNlxA8UU7IxppXnXFU2to3v6B n5W5ySoJ33mvPpjwmDZmM9QK52Wb272wMfnxs04AmvOy0tgsT5xGc6UvNB0/cwNXdKX8 0uEg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1685955468; x=1688547468; 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=FaHv+GqIuupfkrZUyUWk5Q4hx0WfnhqmWCBGMeHIKLU=; b=CgCTEvOezobUmZLMYOKjpUy2+n3HkwXqk9B8eIZfMCHM03zysjZo6hwZ79qOORbDt4 Gr27gtpu9jjcOlm3vWjeeh8gYLkk4nboz5jddr4NafhGqgvkg4ymuFt9OxBfDtbfWelw KiShHJ1xj4ryau3ExqNmolYZOfvv4GcTnqFGdnb8SDx9P7cnrXo/AvJb1V2T/6gsVdKu Vh1Pv+4OTfVgcNZrftCcDp531fZ7LjymN/y9mIioHUI5FT/zcTol0Oy9spe47Q6skcFX otweDgQ36xvV3S68ZH9d4eFHL7Mdpb9rN6wLMNG7ENyMqJG0nGc9+XYav8QF58S/hT/E LtPw== X-Gm-Message-State: AC+VfDzQfP104P4Aj3QHAR37DX7weLa0T0eLKrLJpv5mi+V9vuMPkWjN t9bbo1u75AVwGSl0a6CUDm4XTTrsfKM= X-Google-Smtp-Source: ACHHUZ4fNchsr8TsS3+zd1hpNU/yW7WfoRC3DF0t1G0hg+esIXbE66paMXNH6KGHLjufqn9Qv7HUOQ== X-Received: by 2002:a17:90a:181:b0:256:dbfb:9b5e with SMTP id 1-20020a17090a018100b00256dbfb9b5emr2418000pjc.29.1685955467794; Mon, 05 Jun 2023 01:57:47 -0700 (PDT) Received: from localhost.localdomain ([120.26.165.80]) by smtp.gmail.com with ESMTPSA id mv7-20020a17090b198700b0024dfb8271a4sm5503901pjb.21.2023.06.05.01.57.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jun 2023 01:57:47 -0700 (PDT) From: Yang Bo X-Google-Original-From: Yang Bo To: bpf@vger.kernel.org Cc: ast@kernel.org, Yang Bo Subject: [PATCH 0/2] Add api to manipulate global varaible Date: Mon, 5 Jun 2023 16:57:31 +0800 Message-Id: <20230605085733.1833-1-yb203166@antfin.com> X-Mailer: git-send-email 2.40.1 Precedence: bulk X-Mailing-List: bpf@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,HK_RANDOM_ENVFROM, HK_RANDOM_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net From: Yang Bo We (the antgroup) has a requirement to manipulate global variables. The platform to manage bpf bytecode has no idea about varaibles' type/size/address. It only has some strings (like key = value) passed from admin. We find a way to parse BTF and then query/update the variables. There may be better ways to do it. This approach is what we can find for now. Yang Bo (2): Add api to manipulate global variable mini test case. tools/lib/bpf/bpf.c | 808 ++++++++++++++++++++++++++++++++++++ tools/lib/bpf/bpf.h | 9 + tools/lib/bpf/libbpf.map | 2 + tools/lib/bpf/mini/Makefile | 2 + tools/lib/bpf/mini/main.c | 130 ++++++ 5 files changed, 951 insertions(+) create mode 100644 tools/lib/bpf/mini/Makefile create mode 100644 tools/lib/bpf/mini/main.c -- 2.40.0