From mboxrd@z Thu Jan 1 00:00:00 1970 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 A3ED9187876; Sat, 28 Sep 2024 13:02:53 +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=1727528573; cv=none; b=cc+52OnfmPIXiWnGKOOShw/qlCZyHPdLMELIPynBsEhiHBRJ/fizVVMqpZJ48XFPpHg3dn9UaEI1lhQa4c+v7w4prajjxofX2V1teh7tH35XRkhZK8cVeFniPkPt+dFmy9e95FGst5Qn5hCSqWoA2nJs/y7dac6z3p5OI1dY2cA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727528573; c=relaxed/simple; bh=urz7cW1OH9XkyT5GAilgziDYPmw013WbO3RQCNixOsc=; h=Message-ID:Date:MIME-Version:Subject:To:References:From: In-Reply-To:Content-Type; b=kPxgeyAYMYJljwwmFxmpkTlNuFiK0CPynfhOpZsliXDZh4rsGLzK9c+fieAijypFL1RzDO+/H1lo0PD9ZNZ30hdQqJeopeUYzq+gBB+8NhJ9EpYSAKtrT0qKcOTy4xOFqQZuaUzCvNmeWcxksw/lT3+5AhB3rCx9xbT04HM/TfE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=VX1wH/Aw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="VX1wH/Aw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 38213C4CEC3; Sat, 28 Sep 2024 13:02:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727528573; bh=urz7cW1OH9XkyT5GAilgziDYPmw013WbO3RQCNixOsc=; h=Date:Subject:To:References:From:In-Reply-To:From; b=VX1wH/Aw3LgHIRk8asB6TLmzWoWD6+i8+ctwZL7EWlZocXZTKTyhQHlqeTVHCAMU7 Vp+ZjwUS1YvDPps1shoV2dwis0FpzshNDthcE8AmKA7Ex05TtQj/P2JiKBMdJAvoEH bGywmBCHDj/MW48VLi9fOz8MND0wPHMVzj7EvP4z/hMSp69P/kcDOnSxQGT8SPEldv s0K8uVk50WrYUO6AkSddibLBpJp7bmT8FwYGXcRBCqDctQNLGAN+3hCYAGoI85WJls 9L/UhOfM24Aod9ZNmRRgiENEBzQ2D2mOqDNFU8C8ABpOY62chPtVfmHiiVZ7wlV5Nk 2ynOkpdFQcEHw== Message-ID: <7a2e8819-ac70-4070-a731-53994c72cd79@kernel.org> Date: Sat, 28 Sep 2024 15:02:47 +0200 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RFC 1/2] dt-bindings: mtd: ubi-volume: add 'volume-is-critical' property To: Daniel Golle , Miquel Raynal , Richard Weinberger , Vignesh Raghavendra , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Zhihao Cheng , John Crispin , linux-mtd@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 28/09/2024 14:47, Daniel Golle wrote: > Add the 'volume-is-critical' boolean property which marks a UBI volume > as critical for the device to boot. If set it prevents the user from > all kinds of write access to the volume as well as from renaming it or > detaching the UBI device it is located on. > > Signed-off-by: Daniel Golle > --- > .../devicetree/bindings/mtd/partitions/ubi-volume.yaml | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/Documentation/devicetree/bindings/mtd/partitions/ubi-volume.yaml b/Documentation/devicetree/bindings/mtd/partitions/ubi-volume.yaml > index 19736b26056b..2bd751bb7f9e 100644 > --- a/Documentation/devicetree/bindings/mtd/partitions/ubi-volume.yaml > +++ b/Documentation/devicetree/bindings/mtd/partitions/ubi-volume.yaml > @@ -29,6 +29,15 @@ properties: > description: > This container may reference an NVMEM layout parser. > > + volume-is-critical: > + description: This parameter, if present, indicates that the UBI volume > + contains early-boot firmware images or data which should not be clobbered. > + If set, it prevents the user from renaming the volume, writing to it or > + making any changes affecting it, as well as detaching the UBI device it is > + located on, so direct access to the underlying MTD device is prevented as > + well. > + type: boolean UBI volumes are mapping to partitions 1-to-1, right? So rather I would propose to use partition.yaml - we already have read-only there with very similar description. Best regards, Krzysztof