Re: [meta-rockchip][PATCH v2 1/2] provide a filesystem overlay example

[Trevor Woerner <twoerner@gmail.com>]

On Fri 2025-12-12 @ 01:24:19 PM, Trevor Woerner wrote:
> Most implementations that use an A/B, full-partition update mechanism
> (such as RAUC configured for this scenario) need some way of preserving
> system configurations in a location that survives updates. The RAUC demo
> provided in this layer is an example of a full-partition update,
> therefore provide an example of using a filesystem overlay to preserve
> the /etc and /home locations.
> 
> This example is gated by a configuration knob:
> 
> 	RK_OVERLAY_DEMO
> 
> Signed-off-by: Trevor Woerner <twoerner@gmail.com>
> ---
> changes since v1:
> - the commit message was updated to identify the locations that the demo
>   will overlay (/etc and /home)
> - the README blurb was updated:
>   - to also indicate which locations will have an overlay in the demo
>   - to indicate the kernel config requirement
>   - to explain options on how to include the root's home directory in
>     the overlay
> - use the standard bitbake variable to place the unit files in the
>   standard systemd system unit file location (/usr/lib/systemd)
> - use RequiresMountsFor as the overlay mount unit's dependency mechanism
> ---
>  README                                        | 50 +++++++++++++++++++
>  conf/machine/include/rockchip-rauc.inc        |  1 +
>  .../systemd/data-partition-overlay_1.0.bb     | 22 ++++++++
>  .../recipes-core/systemd/files/etc.mount      | 12 +++++
>  .../recipes-core/systemd/files/home.mount     | 12 +++++
>  5 files changed, 97 insertions(+)
>  create mode 100644 dynamic-layers/rk-rauc-demo/recipes-core/systemd/data-partition-overlay_1.0.bb
>  create mode 100644 dynamic-layers/rk-rauc-demo/recipes-core/systemd/files/etc.mount
>  create mode 100644 dynamic-layers/rk-rauc-demo/recipes-core/systemd/files/home.mount

Pushed to meta-rockchip, master branch.