From patchwork Tue Feb 14 23:12:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ilya Leoshkevich X-Patchwork-Id: 13140996 X-Patchwork-Delegate: bpf@iogearbox.net Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 98385C6379F for ; Tue, 14 Feb 2023 23:12:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232803AbjBNXMz (ORCPT ); Tue, 14 Feb 2023 18:12:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44840 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232865AbjBNXMx (ORCPT ); Tue, 14 Feb 2023 18:12:53 -0500 Received: from mx0a-001b2d01.pphosted.com (mx0b-001b2d01.pphosted.com [148.163.158.5]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2853E1B5 for ; Tue, 14 Feb 2023 15:12:49 -0800 (PST) Received: from pps.filterd (m0098420.ppops.net [127.0.0.1]) by mx0b-001b2d01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 31EMi8nh028094; Tue, 14 Feb 2023 23:12:31 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ibm.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=pp1; bh=zLf5pdxQOXdmqzTFhgclQM/YYwXeaMLO71r6cu5ljls=; b=gyNQEwOoxmsy68YvaEWn4gEd9zQhiuZ4YnAEelT/yUS++JEovfbhcvZFZbB9r9oGF7k+ sVQhtHfySA5IOJNRKx4AG2NvvV1TQnWxXrRVbBFA0WXn2EswGH/g2MajQJtciIwd9lxo Jju3w0PaP4CA50CFFEnbcz91XJ2PmWIMMOtyYtCgOQ1AIGIz2a5AFRkGm+c4V5cK1Mkt 9MU+/mBV1T2IFTL8K2IuB/Avk3RuTqMtVGfUjkCCJmU+NG5BW70EdrJmj7UiUsNU8157 QK/VBGHUmczNscycoiwC+nuOq3xscw2QdhrbXdp67tMIRuy5rZURq/SDlM5luLaQIEWC XQ== Received: from ppma03ams.nl.ibm.com (62.31.33a9.ip4.static.sl-reverse.com [169.51.49.98]) by mx0b-001b2d01.pphosted.com (PPS) with ESMTPS id 3nrkbprjav-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 14 Feb 2023 23:12:31 +0000 Received: from pps.filterd (ppma03ams.nl.ibm.com [127.0.0.1]) by ppma03ams.nl.ibm.com (8.17.1.19/8.17.1.19) with ESMTP id 31EKAhK0017639; Tue, 14 Feb 2023 23:12:29 GMT Received: from smtprelay04.fra02v.mail.ibm.com ([9.218.2.228]) by ppma03ams.nl.ibm.com (PPS) with ESMTPS id 3np2n6mmuj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 14 Feb 2023 23:12:29 +0000 Received: from smtpav07.fra02v.mail.ibm.com (smtpav07.fra02v.mail.ibm.com [10.20.54.106]) by smtprelay04.fra02v.mail.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 31ENCPK523527784 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 14 Feb 2023 23:12:25 GMT Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 785752004D; Tue, 14 Feb 2023 23:12:25 +0000 (GMT) Received: from smtpav07.fra02v.mail.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id E506620040; Tue, 14 Feb 2023 23:12:24 +0000 (GMT) Received: from heavy.lan (unknown [9.171.53.135]) by smtpav07.fra02v.mail.ibm.com (Postfix) with ESMTP; Tue, 14 Feb 2023 23:12:24 +0000 (GMT) From: Ilya Leoshkevich To: Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko Cc: bpf@vger.kernel.org, Heiko Carstens , Vasily Gorbik , Alexander Gordeev , Ilya Leoshkevich Subject: [PATCH bpf-next v3 1/8] libbpf: Introduce bpf_{btf,link,map,prog}_get_info_by_fd() Date: Wed, 15 Feb 2023 00:12:14 +0100 Message-Id: <20230214231221.249277-2-iii@linux.ibm.com> X-Mailer: git-send-email 2.39.1 In-Reply-To: <20230214231221.249277-1-iii@linux.ibm.com> References: <20230214231221.249277-1-iii@linux.ibm.com> MIME-Version: 1.0 X-TM-AS-GCONF: 00 X-Proofpoint-GUID: K21ET8jyE9jtyxR1X-bT5_SqESQmTAKc X-Proofpoint-ORIG-GUID: K21ET8jyE9jtyxR1X-bT5_SqESQmTAKc X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-14_15,2023-02-14_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 lowpriorityscore=0 mlxlogscore=999 priorityscore=1501 adultscore=0 suspectscore=0 mlxscore=0 malwarescore=0 impostorscore=0 spamscore=0 bulkscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302140198 Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net These are type-safe wrappers around bpf_obj_get_info_by_fd(). They found one problem in selftests, and are also useful for adding Memory Sanitizer annotations. Signed-off-by: Ilya Leoshkevich --- tools/lib/bpf/bpf.c | 24 ++++++++++++++++++++++++ tools/lib/bpf/bpf.h | 13 +++++++++++++ tools/lib/bpf/libbpf.map | 5 +++++ 3 files changed, 42 insertions(+) diff --git a/tools/lib/bpf/bpf.c b/tools/lib/bpf/bpf.c index 9aff98f42a3d..b562019271fe 100644 --- a/tools/lib/bpf/bpf.c +++ b/tools/lib/bpf/bpf.c @@ -1044,6 +1044,30 @@ int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len) return libbpf_err_errno(err); } +int bpf_prog_get_info_by_fd(int prog_fd, struct bpf_prog_info *info, + __u32 *info_len) +{ + return bpf_obj_get_info_by_fd(prog_fd, info, info_len); +} + +int bpf_map_get_info_by_fd(int map_fd, struct bpf_map_info *info, + __u32 *info_len) +{ + return bpf_obj_get_info_by_fd(map_fd, info, info_len); +} + +int bpf_btf_get_info_by_fd(int btf_fd, struct bpf_btf_info *info, + __u32 *info_len) +{ + return bpf_obj_get_info_by_fd(btf_fd, info, info_len); +} + +int bpf_link_get_info_by_fd(int link_fd, struct bpf_link_info *info, + __u32 *info_len) +{ + return bpf_obj_get_info_by_fd(link_fd, info, info_len); +} + int bpf_raw_tracepoint_open(const char *name, int prog_fd) { const size_t attr_sz = offsetofend(union bpf_attr, raw_tracepoint); diff --git a/tools/lib/bpf/bpf.h b/tools/lib/bpf/bpf.h index 7468978d3c27..9f698088c9bc 100644 --- a/tools/lib/bpf/bpf.h +++ b/tools/lib/bpf/bpf.h @@ -386,6 +386,19 @@ LIBBPF_API int bpf_link_get_fd_by_id(__u32 id); LIBBPF_API int bpf_link_get_fd_by_id_opts(__u32 id, const struct bpf_get_fd_by_id_opts *opts); LIBBPF_API int bpf_obj_get_info_by_fd(int bpf_fd, void *info, __u32 *info_len); +/* Type-safe variants of bpf_obj_get_info_by_fd(). The callers still needs to + * pass info_len, which should normally be + * sizeof(struct bpf_{prog,map,btf,link}_info), in order to be compatible with + * different libbpf and kernel versions. + */ +LIBBPF_API int bpf_prog_get_info_by_fd(int prog_fd, struct bpf_prog_info *info, + __u32 *info_len); +LIBBPF_API int bpf_map_get_info_by_fd(int map_fd, struct bpf_map_info *info, + __u32 *info_len); +LIBBPF_API int bpf_btf_get_info_by_fd(int btf_fd, struct bpf_btf_info *info, + __u32 *info_len); +LIBBPF_API int bpf_link_get_info_by_fd(int link_fd, struct bpf_link_info *info, + __u32 *info_len); struct bpf_prog_query_opts { size_t sz; /* size of this struct for forward/backward compatibility */ diff --git a/tools/lib/bpf/libbpf.map b/tools/lib/bpf/libbpf.map index 11c36a3c1a9f..50dde1f6521e 100644 --- a/tools/lib/bpf/libbpf.map +++ b/tools/lib/bpf/libbpf.map @@ -384,4 +384,9 @@ LIBBPF_1.1.0 { } LIBBPF_1.0.0; LIBBPF_1.2.0 { + global: + bpf_btf_get_info_by_fd; + bpf_link_get_info_by_fd; + bpf_map_get_info_by_fd; + bpf_prog_get_info_by_fd; } LIBBPF_1.1.0;