From patchwork Mon Apr 25 12:20:53 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christian Schoenebeck X-Patchwork-Id: 12825734 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B848AC433F5 for ; Mon, 25 Apr 2022 12:48:14 +0000 (UTC) Received: from localhost ([::1]:44234 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1niy8T-0007qA-P2 for qemu-devel@archiver.kernel.org; Mon, 25 Apr 2022 08:48:13 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37222) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <5ba5c1058b47466193a6716d5e30f69817fda707@lizzy.crudebyte.com>) id 1niy2I-0006KU-Oa; Mon, 25 Apr 2022 08:41:50 -0400 Received: from lizzy.crudebyte.com ([91.194.90.13]:36553) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from <5ba5c1058b47466193a6716d5e30f69817fda707@lizzy.crudebyte.com>) id 1niy2G-0002Ev-VO; Mon, 25 Apr 2022 08:41:50 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=crudebyte.com; s=lizzy; h=Cc:To:Subject:Date:From:References:In-Reply-To: Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Content-ID: Content-Description; bh=zIrDZd4x8Db0Bp3YUnjhpQ8lXXOO3jEp+5fUqSQpDeA=; b=YYKwX DWXmNszLy/fskLS6Ap8Phq/CZsS98Q/KnK2615vsgd9HFOm0yMiiK3OYqvjmi1xKq+UrqUXzyy9sJ gzaBNgA89I6HHXA2e4FqvXD74yaiL/3I3Nd8GpWxl+uRNrg1GROHrjOSveDEDTKdhEnZ550Mcdp7B 3Syb/wZGnOwraPm3QW7mHxy3M3GEiOgm9/inNTXszXmGlEuFui16G7zN8EfIyygaZPHHVKvmlQw6C yC5IcI+jO9pWAfLRSLTTC9S8Stx8y3B1YUwTXUr9TuDtZRxS5tHmkswZnp5jlLkK08HnJDwEBK9Us 7u7cEDTTQdunEYG3yK1JlMkJfQv0g==; Message-Id: <5ba5c1058b47466193a6716d5e30f69817fda707.1650889269.git.qemu_oss@crudebyte.com> In-Reply-To: References: From: Christian Schoenebeck Date: Mon, 25 Apr 2022 14:20:53 +0200 Subject: [PATCH v3 5/6] 9pfs: fix removing non-existent POSIX ACL xattr on macOS host To: qemu-devel@nongnu.org Cc: Will Cohen , Greg Kurz , Michael Roitzsch , Keno Fischer , Akihiko Odaki , qemu-stable@nongnu.org Received-SPF: none client-ip=91.194.90.13; envelope-from=5ba5c1058b47466193a6716d5e30f69817fda707@lizzy.crudebyte.com; helo=lizzy.crudebyte.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_NONE=0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" When mapped POSIX ACL is used, we are ignoring errors when trying to remove a POSIX ACL xattr that does not exist. On Linux hosts we would get ENODATA in such cases, on macOS hosts however we get ENOATTR instead. As we can be sure that ENOATTR is defined as being identical on Linux hosts (at least by qemu/xattr.h), it is safe to fix this issue by simply comparing against ENOATTR instead of ENODATA. This patch fixes e.g. a command on Linux guest like: cp --preserve=mode old new Signed-off-by: Christian Schoenebeck Link: https://lore.kernel.org/qemu-devel/2866993.yOYK24bMf6@silver/ Reviewed-by: Greg Kurz --- hw/9pfs/9p-posix-acl.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/hw/9pfs/9p-posix-acl.c b/hw/9pfs/9p-posix-acl.c index eadae270dd..4b2cb3c66c 100644 --- a/hw/9pfs/9p-posix-acl.c +++ b/hw/9pfs/9p-posix-acl.c @@ -65,7 +65,11 @@ static int mp_pacl_removexattr(FsContext *ctx, int ret; ret = local_removexattr_nofollow(ctx, path, MAP_ACL_ACCESS); - if (ret == -1 && errno == ENODATA) { + /* + * macOS returns ENOATTR (!=ENODATA on macOS), whereas Linux returns + * ENODATA (==ENOATTR on Linux), so checking for ENOATTR is fine + */ + if (ret == -1 && errno == ENOATTR) { /* * We don't get ENODATA error when trying to remove a * posix acl that is not present. So don't throw the error @@ -115,7 +119,11 @@ static int mp_dacl_removexattr(FsContext *ctx, int ret; ret = local_removexattr_nofollow(ctx, path, MAP_ACL_DEFAULT); - if (ret == -1 && errno == ENODATA) { + /* + * macOS returns ENOATTR (!=ENODATA on macOS), whereas Linux returns + * ENODATA (==ENOATTR on Linux), so checking for ENOATTR is fine + */ + if (ret == -1 && errno == ENOATTR) { /* * We don't get ENODATA error when trying to remove a * posix acl that is not present. So don't throw the error