From patchwork Sat Aug 27 11:12:15 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: xiujianfeng X-Patchwork-Id: 600638 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 8ACE6ECAAD2 for ; Sat, 27 Aug 2022 11:16:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1345404AbiH0LQI (ORCPT ); Sat, 27 Aug 2022 07:16:08 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47766 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234486AbiH0LQD (ORCPT ); Sat, 27 Aug 2022 07:16:03 -0400 Received: from szxga08-in.huawei.com (szxga08-in.huawei.com [45.249.212.255]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3223E24945; Sat, 27 Aug 2022 04:15:56 -0700 (PDT) Received: from dggpeml500023.china.huawei.com (unknown [172.30.72.53]) by szxga08-in.huawei.com (SkyGuard) with ESMTP id 4MFDYx3ZmPz1N7JN; Sat, 27 Aug 2022 19:12:21 +0800 (CST) Received: from ubuntu1804.huawei.com (10.67.174.58) by dggpeml500023.china.huawei.com (7.185.36.114) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.24; Sat, 27 Aug 2022 19:15:55 +0800 From: Xiu Jianfeng To: , , , , , CC: , , , Subject: [PATCH -next v2 6/6] landlock: update chmod and chown support in document Date: Sat, 27 Aug 2022 19:12:15 +0800 Message-ID: <20220827111215.131442-7-xiujianfeng@huawei.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20220827111215.131442-1-xiujianfeng@huawei.com> References: <20220827111215.131442-1-xiujianfeng@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.67.174.58] X-ClientProxiedBy: dggems705-chm.china.huawei.com (10.3.19.182) To dggpeml500023.china.huawei.com (7.185.36.114) X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org update LANDLOCK_ACCESS_FS_{CHMOD, CHGRP} support and add abi change in the document. Signed-off-by: Xiu Jianfeng --- Documentation/userspace-api/landlock.rst | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/Documentation/userspace-api/landlock.rst b/Documentation/userspace-api/landlock.rst index 2509c2fbf98f..0e97a7998fa1 100644 --- a/Documentation/userspace-api/landlock.rst +++ b/Documentation/userspace-api/landlock.rst @@ -61,7 +61,9 @@ the need to be explicit about the denied-by-default access rights. LANDLOCK_ACCESS_FS_MAKE_BLOCK | LANDLOCK_ACCESS_FS_MAKE_SYM | LANDLOCK_ACCESS_FS_REFER | - LANDLOCK_ACCESS_FS_TRUNCATE, + LANDLOCK_ACCESS_FS_TRUNCATE | + LANDLOCK_ACCESS_FS_CHMOD | + LANDLOCK_ACCESS_FS_CHGRP }; Because we may not know on which kernel version an application will be @@ -90,6 +92,11 @@ the ABI. case 2: /* Removes LANDLOCK_ACCESS_FS_TRUNCATE for ABI < 3 */ ruleset_attr.handled_access_fs &= ~LANDLOCK_ACCESS_FS_TRUNCATE; + __attribute__((fallthrough)); + case 3: + /* Removes LANDLOCK_ACCESS_FS_{CHMOD, CHGRP} for ABI < 4 */ + ruleset_attr.handled_access_fs &= ~(LANDLOCK_ACCESS_FS_CHMOD | + LANDLOCK_ACCESS_FS_CHGRP); } This enables to create an inclusive ruleset that will contain our rules.