ROOTFS_SIZE calculation

General Discussions
1

Hi,

I’m facing to a problem during do_image_ext4 task with my yocto project an especially during ROOTFS size calculation.

I’ve integrated Mender with these parameters:

MENDER_STORAGE_TOTAL_SIZE_MB_DEFAULT = "15028"
MENDER_STORAGE_TOTAL_SIZE_MB = "15028"
MENDER_DATA_PART_SIZE_MB = "7514"

So Mender calculate these partitions

boot => 16MB
rootA => 3749 MB
rootB => 37549MB

The size of my ROOTFS (without data directory) is 1GB.
During the build, a custom recipe move about 4GB into the data directory of the ROOTFS.

The problem is that during do_image_ext4 task, there is a check that verify if ROOTFS size do not exceed rootA/B partition size, and it fails because the check integrate data directory.

Is there a way to avoid that?

2

Depends a bit on which Yocto version you are running, but this has been fixed already,

This has been backported to thud

3

Thank you very much for the reply, I’m using sumo version so I’ve found another solution, I have overriden the the function “get_rootfs_size” of the poky image class and updated this line:

output = subprocess.check_output(['du', '-ks', '--exclude=data',
                                      d.getVar('IMAGE_ROOTFS')])
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