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=-2.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,T_DKIMWL_WL_HIGH,USER_AGENT_GIT autolearn=ham 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 4B0A5C4321A for ; Tue, 11 Jun 2019 00:57:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 22DDB20820 for ; Tue, 11 Jun 2019 00:57:00 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="oaZ/Ksl/" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390080AbfFKA46 (ORCPT ); Mon, 10 Jun 2019 20:56:58 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:38926 "EHLO mx0b-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2389164AbfFKA45 (ORCPT ); Mon, 10 Jun 2019 20:56:57 -0400 Received: from pps.filterd (m0148460.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x5B0hoZB022150 for ; Mon, 10 Jun 2019 17:56:56 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=fb.com; h=from : to : cc : subject : date : message-id : mime-version : content-type; s=facebook; bh=srw5tfveHj9krlvBEHzIgoUlpexOB0gVJJfWJxn3m54=; b=oaZ/Ksl//Y8Tm9fwIIpq2MEkB+ZQwEFu5gqzaziu8Jz2OBRqi9a9i+RlnWl36mH9e+UT tsHDalmd5isBUBCcrGL/woUCte5hv3bYhZarC+KXM50hnk8SKTlxq3VOtL5cnYs5VzoQ azjI1TPq7dLfKx03KSYq7hIFI3KK3Vb4cSY= Received: from maileast.thefacebook.com ([163.114.130.16]) by mx0a-00082601.pphosted.com with ESMTP id 2t1r8j2hnx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Mon, 10 Jun 2019 17:56:56 -0700 Received: from mx-out.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:83::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Mon, 10 Jun 2019 17:56:55 -0700 Received: by devvm3632.prn2.facebook.com (Postfix, from userid 172007) id 96FE2D0D72E0; Mon, 10 Jun 2019 17:56:53 -0700 (PDT) Smtp-Origin-Hostprefix: devvm From: Hechao Li Smtp-Origin-Hostname: devvm3632.prn2.facebook.com To: CC: , , , , Hechao Li Smtp-Origin-Cluster: prn2c23 Subject: [PATCH v6 bpf-next 0/3] Add a new API libbpf_num_possible_cpus() Date: Mon, 10 Jun 2019 17:56:49 -0700 Message-ID: <20190611005652.3827331-1-hechaol@fb.com> X-Mailer: git-send-email 2.17.1 X-FB-Internal: Safe MIME-Version: 1.0 Content-Type: text/plain X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-06-10_10:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=13 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1810050000 definitions=main-1906110003 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Getting number of possible CPUs is commonly used for per-CPU BPF maps and perf_event_maps. Add a new API libbpf_num_possible_cpus() that helps user with per-CPU related operations and remove duplicate implementations in bpftool and selftests. v2: Save errno before calling pr_warning in case it is changed. v3: Make sure libbpf_num_possible_cpus never returns 0 so that user only has to check if ret value < 0. v4: Fix error code when reading 0 bytes from possible CPU file. v5: Fix selftests compliation issue. v6: Split commit to reuse libbpf_num_possible_cpus() into two commits: One commit to remove bpf_util.h from test BPF C programs. One commit to reuse libbpf_num_possible_cpus() in bpftools and bpf_util.h. Hechao Li (3): bpf: add a new API libbpf_num_possible_cpus() selftests/bpf: remove bpf_util.h from BPF C progs bpf: use libbpf_num_possible_cpus internally tools/bpf/bpftool/common.c | 53 ++--------------- tools/lib/bpf/libbpf.c | 57 +++++++++++++++++++ tools/lib/bpf/libbpf.h | 16 ++++++ tools/lib/bpf/libbpf.map | 1 + tools/testing/selftests/bpf/bpf_endian.h | 1 + tools/testing/selftests/bpf/bpf_util.h | 37 ++---------- .../selftests/bpf/progs/sockmap_parse_prog.c | 1 - .../bpf/progs/sockmap_tcp_msg_prog.c | 2 +- .../bpf/progs/sockmap_verdict_prog.c | 1 - .../selftests/bpf/progs/test_sysctl_prog.c | 5 +- 10 files changed, 90 insertions(+), 84 deletions(-) -- 2.17.1