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

[Roland Hieber <rhi@pengutronix.de>]

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

 - Roland