From patchwork Thu Jul 14 19:14:48 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 12918436 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 BCE60C433EF for ; Thu, 14 Jul 2022 19:16:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238657AbiGNTQ4 (ORCPT ); Thu, 14 Jul 2022 15:16:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229504AbiGNTQy (ORCPT ); Thu, 14 Jul 2022 15:16:54 -0400 X-Greylist: delayed 74 seconds by postgrey-1.37 at lindbergh.monkeyblade.net; Thu, 14 Jul 2022 12:16:53 PDT Received: from sinmsgout03.his.huawei.com (sinmsgout03.his.huawei.com [119.8.177.38]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id F1E5B2DA88 for ; Thu, 14 Jul 2022 12:16:53 -0700 (PDT) Received: from fraeml714-chm.china.huawei.com (unknown [172.18.156.149]) by sinmsgout03.his.huawei.com (SkyGuard) with ESMTP id 4LkPMz3v2mz9v79Y; Fri, 15 Jul 2022 03:15:43 +0800 (CST) Received: from roberto-ThinkStation-P620.huawei.com (10.204.63.22) by fraeml714-chm.china.huawei.com (10.206.15.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Thu, 14 Jul 2022 21:16:48 +0200 From: Roberto Sassu To: , , , , , , , CC: , Roberto Sassu , Joanne Koong Subject: [RFC][PATCH v8 05/12] bpf: Export bpf_dynptr_get_size() Date: Thu, 14 Jul 2022 21:14:48 +0200 Message-ID: <20220714191455.2101834-6-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220714191455.2101834-1-roberto.sassu@huawei.com> References: <20220714191455.2101834-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.63.22] X-ClientProxiedBy: lhreml754-chm.china.huawei.com (10.201.108.204) To fraeml714-chm.china.huawei.com (10.206.15.33) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: bpf@vger.kernel.org X-Patchwork-Delegate: bpf@iogearbox.net X-Patchwork-State: RFC Export bpf_dynptr_get_size(), so that kernel code dealing with eBPF dynamic pointers can obtain the real size of data carried by this data structure. Reviewed-by: Joanne Koong Signed-off-by: Roberto Sassu --- include/linux/bpf.h | 1 + kernel/bpf/helpers.c | 2 +- 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/bpf.h b/include/linux/bpf.h index a5bf00649995..788800e68793 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2544,6 +2544,7 @@ void bpf_dynptr_init(struct bpf_dynptr_kern *ptr, void *data, enum bpf_dynptr_type type, u32 offset, u32 size); void bpf_dynptr_set_null(struct bpf_dynptr_kern *ptr); int bpf_dynptr_check_size(u32 size); +u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr); #ifdef CONFIG_BPF_LSM void bpf_cgroup_atype_get(u32 attach_btf_id, int cgroup_atype); diff --git a/kernel/bpf/helpers.c b/kernel/bpf/helpers.c index a1c84d256f83..3f5ff8dbd3cb 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -1430,7 +1430,7 @@ static void bpf_dynptr_set_type(struct bpf_dynptr_kern *ptr, enum bpf_dynptr_typ ptr->size |= type << DYNPTR_TYPE_SHIFT; } -static u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr) +u32 bpf_dynptr_get_size(struct bpf_dynptr_kern *ptr) { return ptr->size & DYNPTR_SIZE_MASK; }