Yocto image ubuntu rootfs snapd not running

• OJ

  O. JUD

  11/17/22, 11:11 PM

  Hi, 

  Snapd is not running as expected in the ubuntu build.

  It seems that XZ support for squashfs is missing in kernel build. Is there a reason for that ? 

  Regards

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• KK

  Kothandaraman Kannadasan Staff member

  11/18/22, 1:56 AM

  Hi @O. JUD, Our latest Ubuntu image seems like working well. So, please download our image from here, https://www.ipi.wiki/pages/downloads-imx8mplus. Meanwhile, I will try to check with our software team.

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• OJ

  O. JUD

  11/18/22, 9:32 AM

  Hi Kothandaraman

  I'm not using your Image but i'm building Ubuntu as described on this page : https://www.ipi.wiki/pages/imx8mp-docs?page=HowToBuildUbuntu.html .

  I need to add new devices modules in your kernel so i rebuilt it with your procedure "bitbake core-image-minimal" put  the bootfs on sdcard and added my own Ubuntu rootfs. 

  i'm currently using hardknott_v1_2 with kernel 5.10.35 as my device driver support only 5.10 kernel. SQUASHFS is enabled in  lec-imx8mp_defconfig but not CONFIG_SQUASHFS_XZ when i launch snap install something i have the error bellow : 

  error: system does not fully support snapd: cannot mount squashfs image using "squashfs": mount:
         /tmp/syscheck-mountpoint-271219186: wrong fs type, bad option, bad superblock on /dev/loop0,
         missing codepage or helper program, or other error.

  And dmesg shows : 

  [ 1471.862320] Filesystem uses "xz" compression. This is not supported
  [ 1477.838311] Filesystem uses "xz" compression. This is not supported

  I suppose i need add CONFIG_SQUASHFS_XZ  in lec-imx8mp_defconfig then rebuild the kernel.  

  Rgds

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• OJ

  O. JUD

  11/18/22, 10:00 PM

  @Kothandaraman Kannadasan , I have checked your last Ubuntu image and its the same .

  I checked https://github.com/ADLINK/meta-adlink-nxp/blob/hardknott/recipes-kernel/linux/linux-imx/lec-imx8mm_defconfig too and CONFIG_SQUASHFS_XZ is not enabled. 

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• KK

  Kothandaraman Kannadasan Staff member

  11/21/22, 12:40 AM

  Hi @O. JUD, sorry for the inconvenience. Definitely, we will take your feedback and make them enable.

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• OJ

  O. JUD

  11/21/22, 3:37 PM

  thnks

  I made it work by adding these lines in lec-imx8mp_defconfig 

  CONFIG_SQUASHFS_FILE_CACHE=y

  CONFIG_SQUASHFS_DECOMP_SINGLE=y

  CONFIG_SQUASHFS_XATTR=y

  CONFIG_SQUASHFS_ZLIB=y

  CONFIG_SQUASHFS_LZO=y

  CONFIG_SQUASHFS_XZ=y

  CONFIG_SQUASHFS_FRAGMENT_CACHE_SIZE=3

  CONFIG_CGROUPS=y

  CONFIG_CGROUP_WRITEBACK=y

  CONFIG_CGROUP_SCHED=y

  CONFIG_CGROUP_FREEZER=y

  CONFIG_CGROUP_BPF=y

  CONFIG_SOCK_CGROUP_DATA=y

  CONFIG_NET_CLS_CGROUP=m

  CONFIG_CGROUP_NET_PRIO=y

  CONFIG_CGROUP_NET_CLASSID=y
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