From patchwork Fri Sep 18 13:34:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Alan Maguire X-Patchwork-Id: 11785161 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id D6312112E for ; Fri, 18 Sep 2020 13:36:51 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id B13E220795 for ; Fri, 18 Sep 2020 13:36:51 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=oracle.com header.i=@oracle.com header.b="wdE+PRqn" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726902AbgIRNgn (ORCPT ); Fri, 18 Sep 2020 09:36:43 -0400 Received: from aserp2120.oracle.com ([141.146.126.78]:43368 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726154AbgIRNgj (ORCPT ); Fri, 18 Sep 2020 09:36:39 -0400 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 08IDZ646150561; Fri, 18 Sep 2020 13:35:45 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=corp-2020-01-29; bh=VdeIIb6+r5dYvzRqaqo955U9WnA2C9KjSUXChz7K0ZU=; b=wdE+PRqniNbVNOFGpfUgFS6iohlhE0o7llN0g4Bv0yIBo3wxaDQpFGt22zYboJ0C8/57 SRI5rxC0rO9TAr2uc3tp8Fj8GfXjfean/EgVpwZWQuBhpL4tPc4ovVD58P0DlagiDyIB 5yxopuBi786SQl0uHGwDFOkV+hEAVtBNIKq6UAHST5mDjH4xZIF1tERDIpNCciXUSyeP 9R80mRLitq7qaR5HQLyhgzRpQXp+FInSiUYPlCJ63YzP40K4lJMeSvDIsT4vdm0Uzu+q P750Ic6Zi80k4wbZRS33md0oqdjB7t6FCJAxzmrLggPIJyyYMWYcrZyFEwFMNOJesKe7 NQ== Received: from aserp3030.oracle.com (aserp3030.oracle.com [141.146.126.71]) by aserp2120.oracle.com with ESMTP id 33gp9mq5qb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Fri, 18 Sep 2020 13:35:45 +0000 Received: from pps.filterd (aserp3030.oracle.com [127.0.0.1]) by aserp3030.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 08IDU80x142528; Fri, 18 Sep 2020 13:35:45 GMT Received: from aserv0121.oracle.com (aserv0121.oracle.com [141.146.126.235]) by aserp3030.oracle.com with ESMTP id 33khppqeu2-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 18 Sep 2020 13:35:44 +0000 Received: from abhmp0009.oracle.com (abhmp0009.oracle.com [141.146.116.15]) by aserv0121.oracle.com (8.14.4/8.13.8) with ESMTP id 08IDZe84020800; Fri, 18 Sep 2020 13:35:40 GMT Received: from localhost.uk.oracle.com (/10.175.217.104) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Fri, 18 Sep 2020 13:35:40 +0000 From: Alan Maguire To: ast@kernel.org, daniel@iogearbox.net, andriin@fb.com, yhs@fb.com Cc: linux@rasmusvillemoes.dk, andriy.shevchenko@linux.intel.com, pmladek@suse.com, kafai@fb.com, songliubraving@fb.com, john.fastabend@gmail.com, kpsingh@chromium.org, shuah@kernel.org, rdna@fb.com, scott.branden@broadcom.com, quentin@isovalent.com, cneirabustos@gmail.com, jakub@cloudflare.com, mingo@redhat.com, rostedt@goodmis.org, bpf@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-kselftest@vger.kernel.org, acme@kernel.org, Alan Maguire Subject: [PATCH v5 bpf-next 1/6] bpf: provide function to get vmlinux BTF information Date: Fri, 18 Sep 2020 14:34:30 +0100 Message-Id: <1600436075-2961-2-git-send-email-alan.maguire@oracle.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1600436075-2961-1-git-send-email-alan.maguire@oracle.com> References: <1600436075-2961-1-git-send-email-alan.maguire@oracle.com> X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9747 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 malwarescore=0 suspectscore=0 mlxlogscore=999 phishscore=0 mlxscore=0 adultscore=0 spamscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009180110 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9747 signatures=668679 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 bulkscore=0 mlxlogscore=999 adultscore=0 malwarescore=0 clxscore=1015 lowpriorityscore=0 phishscore=0 spamscore=0 priorityscore=1501 suspectscore=0 impostorscore=0 mlxscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2006250000 definitions=main-2009180110 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org It will be used later for BPF structure display support Signed-off-by: Alan Maguire --- include/linux/bpf.h | 2 ++ kernel/bpf/verifier.c | 18 ++++++++++++------ 2 files changed, 14 insertions(+), 6 deletions(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index c6d9f2c..c0ad5d8 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -1330,6 +1330,8 @@ int bpf_check(struct bpf_prog **fp, union bpf_attr *attr, union bpf_attr __user *uattr); void bpf_patch_call_args(struct bpf_insn *insn, u32 stack_depth); +struct btf *bpf_get_btf_vmlinux(void); + /* Map specifics */ struct xdp_buff; struct sk_buff; diff --git a/kernel/bpf/verifier.c b/kernel/bpf/verifier.c index 814bc6c..11d7985 100644 --- a/kernel/bpf/verifier.c +++ b/kernel/bpf/verifier.c @@ -11311,6 +11311,17 @@ static int check_attach_btf_id(struct bpf_verifier_env *env) } } +struct btf *bpf_get_btf_vmlinux(void) +{ + if (!btf_vmlinux && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) { + mutex_lock(&bpf_verifier_lock); + if (!btf_vmlinux) + btf_vmlinux = btf_parse_vmlinux(); + mutex_unlock(&bpf_verifier_lock); + } + return btf_vmlinux; +} + int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, union bpf_attr __user *uattr) { @@ -11344,12 +11355,7 @@ int bpf_check(struct bpf_prog **prog, union bpf_attr *attr, env->ops = bpf_verifier_ops[env->prog->type]; is_priv = bpf_capable(); - if (!btf_vmlinux && IS_ENABLED(CONFIG_DEBUG_INFO_BTF)) { - mutex_lock(&bpf_verifier_lock); - if (!btf_vmlinux) - btf_vmlinux = btf_parse_vmlinux(); - mutex_unlock(&bpf_verifier_lock); - } + bpf_get_btf_vmlinux(); /* grab the mutex to protect few globals used by verifier */ if (!is_priv)