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[147.75.80.249]) by mx.google.com with ESMTPS id k19-20020aa7d8d3000000b0057296a08f4csi2621718eds.584.2024.05.04.07.51.48 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 04 May 2024 07:51:49 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel+bounces-168710-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) client-ip=147.75.80.249; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b=DFTIeU2M; arc=pass (i=1 dkim=pass dkdomain=kernel.org); spf=pass (google.com: domain of linux-kernel+bounces-168710-linux.lists.archive=gmail.com@vger.kernel.org designates 147.75.80.249 as permitted sender) smtp.mailfrom="linux-kernel+bounces-168710-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id BC66C1F219D8 for ; Sat, 4 May 2024 14:51:48 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 1650C3C099; Sat, 4 May 2024 14:51:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="DFTIeU2M" Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 36058381AF; Sat, 4 May 2024 14:51:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714834300; cv=none; b=obd49fLwRO3rZR0U4HLNwmE0WTXIqv1waePpgFZH708r1d69pLHbRdg0FiQRZq4Et3apG5IN8BoTH3FGpZIm604tjJ1aFBVcJBL7fGK/W9/SCnecdbN53pzJjEv8dAuMv+fkrFMEwSudaBGPniTewBeqKnEmgmSpgQugvl5J2tE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714834300; c=relaxed/simple; bh=aPJA8cLtuHwQ++7MGOOb5vV8YMm+YCTpLz9ofx2QDTY=; h=Mime-Version:Content-Type:Date:Message-Id:To:Cc:Subject:From: References:In-Reply-To; b=bQxzHdLeJtoy50ckAuMYcdzSWf6NTVc1gkWVfNK9dmIrv2BYLPy7qC3/caBNSzXmx4+uvWYV5g7nXqYxETqi3OoanpTqMt6Vqb+DRDIfRMkS+Fi5MsUQg0CWpV9WkOty5ijHCCap+x0BrAOcL0ER4WFQkyyzX7sG5hBdGWpb6/s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=DFTIeU2M; arc=none smtp.client-ip=10.30.226.201 Received: by smtp.kernel.org (Postfix) with ESMTPSA id 73187C072AA; Sat, 4 May 2024 14:51:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1714834299; bh=aPJA8cLtuHwQ++7MGOOb5vV8YMm+YCTpLz9ofx2QDTY=; h=Date:To:Cc:Subject:From:References:In-Reply-To:From; b=DFTIeU2M/aA4EhAyhmcPJ28IRkmUiEFIIRzYRzza8DpNK0UEVRf1BvGdpD4aT32rc cj6hVVmfORvzICN5WqrqYXKVa7o6S6PkWNJniFQT3cKwIx51qejRa8zGQk+o6w45na PRU++DSR11RYTzxb0TfQcPpwuDguZ+cYaJueHNUMI2jx/hEnV/WCrkN2W9CA1rZJfV 2CvIqYh7FlW2FSlunM3SqNlWjhxs0Arrf5caPdPi8lOInEzpdd8AzYlqAIXstAh8o/ RT90wlHWyD3aLRM98/E9kEww/IJ/WestJtSNSREfuyI04clwwWhbqugYCb3/OSfULG 4sySUVX7BdDCA== Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Sat, 04 May 2024 17:51:33 +0300 Message-Id: To: "Ben Boeckel" Cc: "Ignat Korchagin" , "James Bottomley" , "Mimi Zohar" , "David Howells" , "Paul Moore" , "James Morris" , , , , , Subject: Re: [RFC PATCH 0/2] TPM derived keys From: "Jarkko Sakkinen" X-Mailer: aerc 0.17.0 References: <20240503221634.44274-1-ignat@cloudflare.com> In-Reply-To: On Sat May 4, 2024 at 4:55 PM EEST, Ben Boeckel wrote: > On Sat, May 04, 2024 at 03:21:11 +0300, Jarkko Sakkinen wrote: > > I have no idea for what the key created with this is even used, which > > makes this impossible to review. > > Additionally, there is nothing in Documentation/ for how userspace might > use or create them. This includes things like their description format > and describing available options. The whole user story is plain out broken. Documenting a feature that has no provable use case won't fix that part. So it is better to start with the cover letter. With the *existing* knowledge of the *real* issue I don't think we need this tbh. BR, Jarkko