From patchwork Wed Aug 10 16:59:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 12940791 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 99A7AC2BB43 for ; Wed, 10 Aug 2022 16:59:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233029AbiHJQ74 (ORCPT ); Wed, 10 Aug 2022 12:59:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232920AbiHJQ7z (ORCPT ); Wed, 10 Aug 2022 12:59:55 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 736BD2D1F5; Wed, 10 Aug 2022 09:59:54 -0700 (PDT) Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.207]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4M2x1b17hdz682sK; Thu, 11 Aug 2022 00:57:07 +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; Wed, 10 Aug 2022 18:59:51 +0200 From: Roberto Sassu To: , , , , , , , , , , , , , , , , , , , CC: , , , , , , Roberto Sassu , Joanne Koong Subject: [PATCH v10 3/9] bpf: Export bpf_dynptr_get_size() Date: Wed, 10 Aug 2022 18:59:26 +0200 Message-ID: <20220810165932.2143413-4-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220810165932.2143413-1-roberto.sassu@huawei.com> References: <20220810165932.2143413-1-roberto.sassu@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.204.63.22] X-ClientProxiedBy: lhrpeml100005.china.huawei.com (7.191.160.25) To fraeml714-chm.china.huawei.com (10.206.15.33) X-CFilter-Loop: Reflected Precedence: bulk List-ID: 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 a627a02cf8ab..a82f8c559ae2 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2563,6 +2563,7 @@ 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 3c1b9bbcf971..e4637ccb3016 100644 --- a/kernel/bpf/helpers.c +++ b/kernel/bpf/helpers.c @@ -1442,7 +1442,7 @@ 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; }