From patchwork Wed Dec 2 06:52:42 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrii Nakryiko X-Patchwork-Id: 1409350 Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=pass (p=none dis=none) header.from=kernel.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4Cm8np3xLTz9sTL for ; Wed, 2 Dec 2020 17:53:50 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728692AbgLBGxe convert rfc822-to-8bit (ORCPT ); Wed, 2 Dec 2020 01:53:34 -0500 Received: from mx0a-00082601.pphosted.com ([67.231.145.42]:26082 "EHLO mx0a-00082601.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726202AbgLBGxe (ORCPT ); Wed, 2 Dec 2020 01:53:34 -0500 Received: from pps.filterd (m0109334.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 0B26ni0r013685 for ; Tue, 1 Dec 2020 22:52:53 -0800 Received: from mail.thefacebook.com ([163.114.132.120]) by mx0a-00082601.pphosted.com with ESMTP id 355agssbgu-3 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Tue, 01 Dec 2020 22:52:53 -0800 Received: from intmgw003.03.ash8.facebook.com (2620:10d:c085:208::11) by mail.thefacebook.com (2620:10d:c085:11d::4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Tue, 1 Dec 2020 22:52:50 -0800 Received: by devbig012.ftw2.facebook.com (Postfix, from userid 137359) id 8D2402ECA750; Tue, 1 Dec 2020 22:52:50 -0800 (PST) From: Andrii Nakryiko To: , , , CC: , Subject: [PATCH bpf-next 2/3] libbpf: add base BTF accessor Date: Tue, 1 Dec 2020 22:52:42 -0800 Message-ID: <20201202065244.530571-3-andrii@kernel.org> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20201202065244.530571-1-andrii@kernel.org> References: <20201202065244.530571-1-andrii@kernel.org> MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.312,18.0.737 definitions=2020-12-02_01:2020-11-30,2020-12-02 signatures=0 X-Proofpoint-Spam-Details: rule=fb_default_notspam policy=fb_default score=0 mlxscore=0 malwarescore=0 phishscore=0 impostorscore=0 mlxlogscore=809 spamscore=0 adultscore=0 clxscore=1015 lowpriorityscore=0 bulkscore=0 priorityscore=1501 suspectscore=8 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2012020040 X-FB-Internal: deliver Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org Add ability to get base BTF. It can be also used to check if BTF is split BTF. Signed-off-by: Andrii Nakryiko --- tools/lib/bpf/btf.c | 5 +++++ tools/lib/bpf/btf.h | 1 + tools/lib/bpf/libbpf.map | 1 + 3 files changed, 7 insertions(+) diff --git a/tools/lib/bpf/btf.c b/tools/lib/bpf/btf.c index 8ff46cd30ca1..1935e83d309c 100644 --- a/tools/lib/bpf/btf.c +++ b/tools/lib/bpf/btf.c @@ -432,6 +432,11 @@ __u32 btf__get_nr_types(const struct btf *btf) return btf->start_id + btf->nr_types - 1; } +const struct btf *btf__base_btf(const struct btf *btf) +{ + return btf->base_btf; +} + /* internal helper returning non-const pointer to a type */ static struct btf_type *btf_type_by_id(struct btf *btf, __u32 type_id) { diff --git a/tools/lib/bpf/btf.h b/tools/lib/bpf/btf.h index 1093f6fe6800..1237bcd1dd17 100644 --- a/tools/lib/bpf/btf.h +++ b/tools/lib/bpf/btf.h @@ -51,6 +51,7 @@ LIBBPF_API __s32 btf__find_by_name(const struct btf *btf, LIBBPF_API __s32 btf__find_by_name_kind(const struct btf *btf, const char *type_name, __u32 kind); LIBBPF_API __u32 btf__get_nr_types(const struct btf *btf); +LIBBPF_API const struct btf *btf__base_btf(const struct btf *btf); LIBBPF_API const struct btf_type *btf__type_by_id(const struct btf *btf, __u32 id); LIBBPF_API size_t btf__pointer_size(const struct btf *btf); diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 29ff4807b909..ed55498c4122 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -340,6 +340,7 @@ LIBBPF_0.2.0 { LIBBPF_0.3.0 { global: + btf__base_btf; btf__parse_elf_split; btf__parse_raw_split; btf__parse_split;