Scarthgap recipe to save and package to secondary partition

Scarthgap recipe to save and package to secondary partition

[pierre.daye]

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Hello,

I am updating our system from Honnister to Scarthgap.
I do have a wks file that prepare the system with multiple partitions (a boot, two rootfs, one persistent media and one swap).

> 
> part /boot --source bootimg-partition --ondisk mmcblk1 --fstype=vfat
> --label boot_A --active --align 4096 --size 20 --fsoptions "vfat
> rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro"
> 
> part / --source rootfs --ondisk mmcblk1 --fstype=ext4 --label root_A
> --align 4096 --exclude-path=media/
> part --source rootfs --ondisk mmcblk1 --fstype=ext4 --label root_B --align
> 4096
> part /media --rootfs-dir=${IMAGE_ROOTFS}/media --size=128M --ondisk
> mmcblk1 --fstype=ext4 --label data --align 4096
> part swap --ondisk mmcblk1 --size 44 --label swap --fstype=swap
> --size=2048M --overhead-factor 1
> 

I am trying to store configuration files onto the persistent media partition in one of my recipes. I am showing here the relevant part:

> 
> do_install:append() {
> mkdir -p ${D}/media/data/calibrations
> install -m 0644 ${S}/../system_config.json
> ${D}/media/data/system_config.json
> install -m 0644 ${S}/../system_config_temperature.json
> ${D}/media/data/system_config_temperature.json
> install -m 0644 ${S}/../calib_0000_00_00_00_00_00.raw
> ${D}/media/data/calibrations/calib_0000_00_00_00_00_00.raw
> }
> FILES:${PN} += "/usr/share/p3_paradigms/*"
> FILES:${PN} += "/media/data/* "
> FILES:${PN} += "/media/data/calibrations/* "
> 

The recipe was working great under honnister and my wic file contained the media partition and all the files I copied into it with the recipe. However, when I use the same approach with Scarthgap, I have QA error for empty-dirs

> 
> do_package_qa: QA Issue: embedded-services installs files in /media, but
> it is expected to be empty [empty-dirs]
> 

Any idea on how I can solve this? What am I doing wrongly?
Thanks!

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Re: [yocto] Scarthgap recipe to save and package to secondary partition

[Gyorgy Sarvari]

> Any idea on how I can solve this? What am I doing wrongly?
> Thanks!
>

You could try to remove /media from QA_EMPTY_DIRS in distro.conf or 
similar place:

QA_EMPTY_DIRS:remove = "/media"

See also: 
https://docs.yoctoproject.org/ref-manual/variables.html#term-QA_EMPTY_DIRS

Re: [yocto] Scarthgap recipe to save and package to secondary partition

[Gyorgy Sarvari]

On 12.12.24 14:19, Gyorgy Sarvari wrote:
>> Any idea on how I can solve this? What am I doing wrongly?
>> Thanks!
>>
>
> You could try to remove /media from QA_EMPTY_DIRS in distro.conf or 
> similar place:
>
> QA_EMPTY_DIRS:remove = "/media"
>
> See also: 
> https://docs.yoctoproject.org/ref-manual/variables.html#term-QA_EMPTY_DIRS
>
Small self-correction (and regrettable noise): looking at it a bit more, 
it isn't necessary to make it a global config, it should be enough to 
add it to the package recipe itself. (But the main idea remains the same)

Re: [yocto] Scarthgap recipe to save and package to secondary partition

[pierre.daye]

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Hello

Thanks for the update, I do not have the error anymore! That is a great step forward but the files are not populated on the /media partition...

any supplemental thoughts?

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Re: [yocto] Scarthgap recipe to save and package to secondary partition

[pierre.daye]

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... I finally figured it out!

This is how the wks file should be defined:

> 
> part /boot --source bootimg-partition --ondisk mmcblk1 --fstype=vfat
> --label boot_A --active --align 4096 --size 20 --fsoptions "vfat
> rw,relatime,fmask=0022,dmask=0022,codepage=437,iocharset=iso8859-1,shortname=mixed,errors=remount-ro"
> 
> part / --source rootfs --ondisk mmcblk1 --fstype=ext4 --label root_A
> --align 4096 --exclude-path=media/
> part --source rootfs --ondisk mmcblk1 --fstype=ext4 --label root_B --align
> 4096 --exclude-path=media/
> part /media --source rootfs --rootfs-dir=${IMAGE_ROOTFS}/media --size=128M
> --ondisk mmcblk1 --fstype=ext4 --label data --align 4096
> part swap --ondisk mmcblk1 --size 44 --label swap --fstype=swap
> --size=2048M --overhead-factor 1
> 
> 

Notice the fact that:

* The mounted point should be excluded from both the root_A and root_B
* The media partition should be sourced on rootfs
* The media partition needs the --rootfs-dir=${IMAGE_ROOTFS}/media options (otherwise the whole rootfs is copied onto /media

Using this in the original method in the recipe above makes it works as expected (if you add the QA_EMPTY_DIRS:remove = "/media"

Thanks

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