From patchwork Tue Jun 21 16:37:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Roberto Sassu X-Patchwork-Id: 583735 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 36DC7C43334 for ; Tue, 21 Jun 2022 16:38:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233357AbiFUQi4 (ORCPT ); Tue, 21 Jun 2022 12:38:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52128 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230177AbiFUQiz (ORCPT ); Tue, 21 Jun 2022 12:38:55 -0400 Received: from frasgout.his.huawei.com (frasgout.his.huawei.com [185.176.79.56]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 8B71C1929E; Tue, 21 Jun 2022 09:38:53 -0700 (PDT) Received: from fraeml714-chm.china.huawei.com (unknown [172.18.147.201]) by frasgout.his.huawei.com (SkyGuard) with ESMTP id 4LSBz80lLDz6801q; Wed, 22 Jun 2022 00:38:28 +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; Tue, 21 Jun 2022 18:38:50 +0200 From: Roberto Sassu To: , , , , , , , CC: , , , , , , Roberto Sassu , Joanne Koong Subject: [PATCH v5 1/5] bpf: Export bpf_dynptr_get_size() Date: Tue, 21 Jun 2022 18:37:53 +0200 Message-ID: <20220621163757.760304-2-roberto.sassu@huawei.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220621163757.760304-1-roberto.sassu@huawei.com> References: <20220621163757.760304-1-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: linux-kselftest@vger.kernel.org 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 d05e1495a06e..3ec0f167e9d7 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -2521,5 +2521,6 @@ 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); #endif /* _LINUX_BPF_H */ 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; }