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=-3.9 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=no 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 86023C433FF for ; Tue, 13 Aug 2019 18:55:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5043D2084D for ; Tue, 13 Aug 2019 18:55:20 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=fb.com header.i=@fb.com header.b="DZK2D41U" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727954AbfHMSzT (ORCPT ); Tue, 13 Aug 2019 14:55:19 -0400 Received: from mx0b-00082601.pphosted.com ([67.231.153.30]:35256 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727182AbfHMSzT (ORCPT ); Tue, 13 Aug 2019 14:55:19 -0400 Received: from pps.filterd (m0089730.ppops.net [127.0.0.1]) by m0089730.ppops.net (8.16.0.27/8.16.0.27) with SMTP id x7DIrsHY030669 for ; Tue, 13 Aug 2019 11:55:18 -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=tu52X/aBM0QBHjL+mzrNRcQPeYQPOEPRN0uQWajrw2I=; b=DZK2D41UiyY7zvB/EvTmKFrFmYe1GbXhNRuXJ9UWwV65C162PjeFWR/ugzeeKSPoldIz 2etnIpI8KDkeULdudtGSplZpgzYFBcBBrCNRBQ8tqJJ0TywnHbWTvxQGSSf6dkyLk3Bv GtoFljFkO2VsO++v3yGfZLna3Uo7rgeRrJU= Received: from maileast.thefacebook.com ([163.114.130.16]) by m0089730.ppops.net with ESMTP id 2uc2tg010j-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 13 Aug 2019 11:55:18 -0700 Received: from mx-out.facebook.com (2620:10d:c0a8:1b::d) by mail.thefacebook.com (2620:10d:c0a8:82::d) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Tue, 13 Aug 2019 11:55:17 -0700 Received: by dev101.prn2.facebook.com (Postfix, from userid 137359) id A24FC861677; Tue, 13 Aug 2019 11:55:16 -0700 (PDT) Smtp-Origin-Hostprefix: dev From: Andrii Nakryiko Smtp-Origin-Hostname: dev101.prn2.facebook.com To: , , , , CC: , , Andrii Nakryiko Smtp-Origin-Cluster: prn2c23 Subject: [PATCH bpf-next 0/2] libbpf: make use of BTF through sysfs Date: Tue, 13 Aug 2019 11:54:41 -0700 Message-ID: <20190813185443.437829-1-andriin@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=2019-08-13_06:,, signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 priorityscore=1501 malwarescore=0 suspectscore=9 phishscore=0 bulkscore=0 spamscore=0 clxscore=1015 lowpriorityscore=0 mlxscore=0 impostorscore=0 mlxlogscore=276 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.0.1-1906280000 definitions=main-1908130177 X-FB-Internal: deliver Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Now that kernel's BTF is exposed through sysfs at well-known location, attempt to load it first as a target BTF for the purpose of BPF CO-RE relocations. Patch #1 is a follow-up patch to rename /sys/kernel/btf/kernel into /sys/kernel/btf/vmlinux. Patch #2 adds ability to load raw BTF contents from sysfs and expands the list of locations libbpf attempts to load vmlinux BTF from. Andrii Nakryiko (2): btf: rename /sys/kernel/btf/kernel into /sys/kernel/btf/vmlinux libbpf: attempt to load kernel BTF from sysfs first Documentation/ABI/testing/sysfs-kernel-btf | 2 +- kernel/bpf/sysfs_btf.c | 30 +++++----- scripts/link-vmlinux.sh | 18 +++--- tools/lib/bpf/libbpf.c | 64 +++++++++++++++++++--- 4 files changed, 82 insertions(+), 32 deletions(-) -- 2.17.1