Re: [OE-core] [PATCH v2] wic: add --extra-part-space option to set unused space

["Mathieu Dubois-Briand" <mathieu.dubois-briand@bootlin.com>]

On Fri Aug 8, 2025 at 4:49 PM CEST, pierre-loup.gosse via lists.openembedded.org wrote:
> From: Pierre-Loup GOSSE <pierre-loup.gosse@smile.fr>
>
> Currently, the content of the partition is filled by the filesystem
> without leaving any unused free space. The --extra-space flag adds
> extra space to the filesystem size, not to the partition.
>
> Unused free space after the filesystem can be useful for some cases,
> such as encrypting a partition at runtime. With --extra-part-space 32M,
> we ensure that the last 32M of the partition is unused: this space does
> not contain filesystem data and can store the LUKS2 header.
>
> The implementation sets a difference between the partition and
> filesystem size:
>   - With --fixed-size, the extra part space is removed from the
>     filesystem size.
>   - Otherwise (with or without --size flags), the extra part space is
>     added to the partition size.
>
> Signed-off-by: Pierre-Loup GOSSE <pierre-loup.gosse@smile.fr>
>
> CC: Alexander Kanavin <alex.kanavin@gmail.com>
> ---

Hi Pierre-Loup,

Thanks for the v2.

It looks like this is failing the selftests:

2025-08-09 08:38:22,672 - oe-selftest - INFO - 9: 75/92 535/635 (30.50s) (2 failed) (wic.Wic2.test_fixed_size_error)
2025-08-09 08:38:22,672 - oe-selftest - INFO - testtools.testresult.real._StringException: Traceback (most recent call last):
  File "/srv/pokybuild/yocto-worker/oe-selftest-fedora/build/meta/lib/oeqa/selftest/cases/wic.py", line 1221, in test_fixed_size_error
    p, _ = self._get_wic_partitions(wkspath, ignore_status=True)
           ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/srv/pokybuild/yocto-worker/oe-selftest-fedora/build/meta/lib/oeqa/selftest/cases/wic.py", line 1192, in _get_wic_partitions
    res = runCmd("parted -m %s unit kib p" % wicimg,
                 native_sysroot=native_sysroot, stderr=subprocess.PIPE)
  File "/srv/pokybuild/yocto-worker/oe-selftest-fedora/build/meta/lib/oeqa/utils/commands.py", line 214, in runCmd
    raise AssertionError("Command '%s' returned non-zero exit status %d:\n%s" % (command, result.status, exc_output))
AssertionError: Command 'parted -m None unit kib p' returned non-zero exit status 1:
WARNING: You are not superuser.  Watch out for permissions.
Error: Could not stat device None - No such file or directory.


https://autobuilder.yoctoproject.org/valkyrie/#/builders/48/builds/2050
https://autobuilder.yoctoproject.org/valkyrie/#/builders/35/builds/2121
https://autobuilder.yoctoproject.org/valkyrie/#/builders/23/builds/2271

Can you have a look at this issue please?

Best regards,
Mathieu

-- 
Mathieu Dubois-Briand, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com