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[2620:137:e000::3:5]) by mx.google.com with ESMTPS id ca11-20020a17090af30b00b00283a1ef6feasi6011220pjb.147.2023.11.20.03.46.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 20 Nov 2023 03:46:50 -0800 (PST) Received-SPF: pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::3:5 as permitted sender) client-ip=2620:137:e000::3:5; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=V9Hd9FtA; spf=pass (google.com: domain of linux-nfs-owner@vger.kernel.org designates 2620:137:e000::3:5 as permitted sender) smtp.mailfrom=linux-nfs-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by groat.vger.email (Postfix) with ESMTP id B4BAB8065ECB; Mon, 20 Nov 2023 03:46:47 -0800 (PST) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.11 at groat.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232582AbjKTLqi (ORCPT + 99 others); Mon, 20 Nov 2023 06:46:38 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:48186 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232566AbjKTLqi (ORCPT ); Mon, 20 Nov 2023 06:46:38 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A8F9D93 for ; Mon, 20 Nov 2023 03:46:34 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 0CB02C433C9; Mon, 20 Nov 2023 11:46:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1700480794; bh=M2b84uF6M/Lob5IrJYn4aQJpeybX+l2M+ccMnhzAHDw=; h=Subject:From:To:Date:In-Reply-To:References:From; b=V9Hd9FtAvH5CofsQnz2tDlLIW21SYARlwKKzQLBFcVfAnYwtW1eGlscHy7R8hYqO4 zx2G5mLn3N+sPNdHTP3n5f4xx4j9eQR37caEwzC3oSp7XTIFUi2SCrZeybjlc5v7v7 p0V+IrpwX/MajPS0Xen9T4A18aJlTzYMrviERRPci8glQDvTAIvDO+bqjTKsOBf2cJ QOf9ffwKfoXM6Ok9WQkL97Smox0p/wCDc0O9Mp7oP60qnOS3FsAKWkAoeKwTx1GDtD 0er9dicJBs4bQJJMjlov3aXOB4qwA8alSVIlczL5nMWBSrsSJafez+fN7vcsHjNKw5 fynE4F1pYryDw== Message-ID: <0d7966163db13d71cb4679d51db5cacf91f42b6b.camel@kernel.org> Subject: Re: How to set the NFSv4 "HIDDEN" attribute on Linux? From: Jeff Layton To: Cedric Blancher , Linux NFS Mailing List Date: Mon, 20 Nov 2023 06:46:32 -0500 In-Reply-To: References: <83a30ef92afa05d50232bd3c933f8eb45ed8f98b.camel@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; 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kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.1 (3.50.1-1.fc39) MIME-Version: 1.0 X-Spam-Status: No, score=-1.2 required=5.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on groat.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-nfs@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (groat.vger.email [0.0.0.0]); Mon, 20 Nov 2023 03:46:47 -0800 (PST) On Sun, 2023-11-19 at 17:51 +0100, Cedric Blancher wrote: > On Sat, 18 Nov 2023 at 12:56, Jeff Layton wrote: > >=20 > > On Sat, 2023-11-18 at 07:24 +0100, Cedric Blancher wrote: > > > Good morning! > > >=20 > > > NFSv4 has a "hidden" filesystem object attribute. How can I set that > > > on a Linux NFSv4 server, or in a filesystem exported on Linux via > > > NFSv4, so that the NFSv4 client gets this attribute for a file? > > >=20 > >=20 > > You can't. RFC 8881 defines that as "TRUE, if the file is considered > > hidden with respect to the Windows API." There is no analogous Linux > > inode attribute. >=20 > Can we use setfattr and getfattr to set/get the NFSv4.1 HIDDEN and > ARCHIVE? We have Windows NFSv4 clients (and kofemann/Roland's codebase > supports this), and that means we need to be able to set/get and > backup/restore these flags on the NFSv4 server side. >=20 No. They would need to be stored in the inode on the server somehow and there is no place to store them. These attributes are simply not supported by the Linux NFS server. --=20 Jeff Layton