Re: [DistroKit] [PATCH 7/8] rauc: add initial support

["Jan Lübbe" <jlu@pengutronix.de>]

On Thu, 2023-03-02 at 10:41 +0100, Roland Hieber wrote:
> On Mon, Feb 13, 2023 at 08:37:25AM +0100, Jan Lübbe wrote:
> > On Sun, 2023-02-12 at 23:14 +0100, Roland Hieber wrote:
> > > +++ b/projectroot/etc/rauc/system.conf
> > > @@ -0,0 +1,16 @@
> > > +[system]
> > > +compatible=@RAUC_BUNDLE_COMPATIBLE@
> > > +bootloader=barebox
> > > +
> > 
> > Please disable support for plain bundles.
> 
> ACK.
> 
> > Also, add a rauc data directory on the data partition so that we can use
> > adaptive updates and keep a global slot status file.
> 
> Okay, this turned out to be a bit more involved, because although there
> is a data partition, it currently not mounted, because there is no mount
> unit for it and also no fstab entry, and it also there's no file system
> on it because systemd-autoformat@mmcblk3.service fails to run because
> mkfs cannot find the partition because after the previous steps which
> resize the partition to fill the maximum space on the SD card result in
> the partition table needing to be re-read by the kernel, which fails
> because the rootfs from the same block device is already mounted.
> 
> And that is my current yak shaving status… I think the 'correct' way to
> do this would be using systemd-repart [1] before the rootfs is mounted
> (but maybe we need an initrd for that…? not sure…), or simply use the
> existing 512 MB data partition generated by genimage and let the user
> resize it manually when needed.
> 
> [1]: https://www.freedesktop.org/software/systemd/man/systemd-repart.html

On the LXA TAC we currently use systemd-repart for this:
https://github.com/linux-automation/meta-lxatac/tree/langdale/meta-lxatac-bsp/recipes-core/lxatac-repart

We use it from the running system (not initramfs).

Jan

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