.overlay directory

[Milton Miller II]

On Jan 6, 2021, Leo Cheng wrote:
> Hi Teams,
>  
> I’m engineer of developing openbmc.
> I have the issue of restore-defaults: targeted_clean and I find the
>targeted_clean function in the init script which is from
>meta-openbmc-mods\meta-common\recipes-phosphor\preinit-mounts\preinit
>-mounts

Hi.  

I'm not familiar with this directory.  Since you are talking about 
wolfpass I am guessing you are talking about intel modifications 
but don't have a full reference.

> 
>  
> 
> I can’t find /tmp/.rwfs/.overlay in BMC.
> 
>  
> Check Intel openbmc, /tmp/.rwfs/.overlay exists in BMC.
> 
>  
> How to add it? Do you have any idea?
>  


I do not know what the changes in this mods repository 
are about nor any background.  The original scripts 
operate under /run.

(I wrote the original init and update scripts and have
been involved in reviewing changes.  They are here 

https://github.com/openbmc/openbmc/blob/master/meta-phosphor/recipes-phosphor/initrdscripts/files/

>From looking at the snippit graphics there was a function 
targeted_clean that was trying to  preserve some files and 
remove the remainder.   

A similar function is availabe via the whitelist in the
original init scripts. 


While the wlist is hardcoded in
the existing repository it would be easy to implement 
dynamic build control of the content if we move it to 
the phosphor-misc repository


If the issue is about making only etc and var updatable,
I am willing to assist or write an update with someone to 
test.   The proposed filesystem stack would be similar to 
the ubi and emmc options with a writable /var containing 
the /etc overlay.

milton

> Thanks.
>  
> Best Regards,
> Leo Cheng
>