From patchwork Sun Sep 27 22:09:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andreas Gruenbacher X-Patchwork-Id: 7274371 Return-Path: X-Original-To: patchwork-linux-fsdevel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 530B39F1D5 for ; Sun, 27 Sep 2015 22:26:58 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 715162072E for ; Sun, 27 Sep 2015 22:26:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9084A2071A for ; Sun, 27 Sep 2015 22:26:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756295AbbI0WMG (ORCPT ); Sun, 27 Sep 2015 18:12:06 -0400 Received: from mx1.redhat.com ([209.132.183.28]:46414 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1756007AbbI0WMD (ORCPT ); Sun, 27 Sep 2015 18:12:03 -0400 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) by mx1.redhat.com (Postfix) with ESMTPS id 9D4B5C0B1B3F; Sun, 27 Sep 2015 22:12:03 +0000 (UTC) Received: from nuc.home.com (vpn1-4-81.ams2.redhat.com [10.36.4.81]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id t8RM9cds030610; Sun, 27 Sep 2015 18:11:58 -0400 From: Andreas Gruenbacher To: Alexander Viro , "Theodore Ts'o" , Andreas Dilger , "J. Bruce Fields" , Jeff Layton , Trond Myklebust , Anna Schumaker , linux-ext4@vger.kernel.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-nfs@vger.kernel.org, linux-api@vger.kernel.org Subject: [PATCH v8 24/41] richacl: Set the other permissions to the other mask Date: Mon, 28 Sep 2015 00:09:15 +0200 Message-Id: <1443391772-10171-25-git-send-email-agruenba@redhat.com> In-Reply-To: <1443391772-10171-1-git-send-email-agruenba@redhat.com> References: <1443391772-10171-1-git-send-email-agruenba@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Change the acl so that everyone@ is granted the permissions set in the other mask. Signed-off-by: Andreas Gruenbacher Reviewed-by: J. Bruce Fields --- fs/richacl_compat.c | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) diff --git a/fs/richacl_compat.c b/fs/richacl_compat.c index 16deeb4..21ee31e 100644 --- a/fs/richacl_compat.c +++ b/fs/richacl_compat.c @@ -462,3 +462,44 @@ richacl_set_owner_permissions(struct richacl_alloc *alloc) } return 0; } + +/** + * richacl_set_other_permissions - set the other permissions to the other mask + * @alloc: acl and number of allocated entries + * @added: permissions added for everyone@ + * + * Change the acl so that everyone@ is granted the permissions set in the other + * mask. This leaves at most one efective everyone@ allow entry at the end of + * the acl. If everyone@ end up being granted additional permissions, these + * permissions are returned in @added. + */ +static int +richacl_set_other_permissions(struct richacl_alloc *alloc, unsigned int *added) +{ + struct richacl *acl = alloc->acl; + unsigned int x = RICHACE_POSIX_ALWAYS_ALLOWED; + unsigned int other_mask = acl->a_other_mask & ~x; + struct richace *ace; + + if (!(other_mask && + (acl->a_flags & RICHACL_WRITE_THROUGH))) + return 0; + + *added = other_mask; + ace = acl->a_entries + acl->a_count - 1; + if (acl->a_count == 0 || + !richace_is_everyone(ace) || + richace_is_inherit_only(ace)) { + ace++; + if (richacl_insert_entry(alloc, &ace)) + return -1; + ace->e_type = RICHACE_ACCESS_ALLOWED_ACE_TYPE; + ace->e_flags = RICHACE_SPECIAL_WHO; + ace->e_mask = other_mask; + ace->e_id.special = RICHACE_EVERYONE_SPECIAL_ID; + } else { + *added &= ~ace->e_mask; + richace_change_mask(alloc, &ace, other_mask); + } + return 0; +}