linux-kernel - Re: [PATCH] kernel: Add Mount Option For Efivarfs

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Message-ID: <ZOeQU9ACbj41g2Ni@srcf.ucam.org>
Date:   Thu, 24 Aug 2023 18:16:03 +0100
From:   Matthew Garrett <mjg59@...f.ucam.org>
To:     Jiao Zhou <jiaozhou@...gle.com>
Cc:     Ard Biesheuvel <ardb@...nel.org>, Peter Jones <pjones@...hat.com>,
        linux-fsdevel@...r.kernel.org, Jeremy Kerr <jk@...abs.org>,
        linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] kernel: Add Mount Option For Efivarfs

On Thu, Aug 24, 2023 at 12:51:07PM +0100, Jiao Zhou wrote:
> We want to support fwupd for updating system firmware on Reven. Capsule updates
> need to create UEFI variables. Our current approach to UEFI variables of
> just allowing access to a static list of them at boot time won't work here.
> 
> I think we could add mount options to efivarfs to set the uid/gid. We'd
> then mount the file system with fwupd's uid/gid. This approach is used by a
> number of other filesystems that don't have native support for ownership,
> so I think it should be upstreamable.

Makes sense.

Acked-by: Matthew Garrett <mgarrett@...ora.tech>