Barebox and ext4 ? problems

[Holger Schurig <holgerschurig@gmail.com>]

Hi,

i just noticed that Barebox 2017.08.0 has trouble with one of my ext4
partitions. My i.mX6q device has both SD-Card and eMMC. Normally I boot
from SD-Card, and then from there I use normal "fdisk" / "mkfs.ext4 -F
-j -L $label /dev/$dev" to create the ext4 partitions. Then I mount this
and rsync the contents of the SD-Card into the eMMC partition.

Now, when I boot into Barebox, I can't access the /boot device. Look at
the weird flags:

barebox:/ detect mmc3 
barebox:/ mkdir /mnt
barebox:/ mount /dev/mmc3.0 /mnt/
barebox:/ ll /mnt
drwxrwxrwx              0 .
drwxrwxrwx              0 ..
?---------              0 bin
?---------              0 boot
?---------              0 dev
drwxr-xr-x           4096 etc
lrwxrwxrwx              9 home -> /opt/home
drwxr-xr-x           4096 lib
drwx------          16384 lost+found
drwxr-xr-x           4096 media
?---------              0 mnt
?---------              0 opt
?---------              0 proc
drwxr-xr-x           4096 root
drwxr-xr-x           4096 run
drwxr-xr-x           4096 sbin
?---------              0 srv
?---------              0 sys
?---------              0 tmp
drwxr-xr-x           4096 usr
drwxr-xr-x           4096 var


So, some directories like "boot" aren't directories. Moreover, some
directories that I can access have the wrong contents:

barebox:/ ll /mnt/media/media
drwxr-xr-x           4096 .
drwxrwxrwx              0 ..
crw-r-----              0 console
lrwxrwxrwx             11 core -> /proc/kcore
lrwxrwxrwx             14 fd -> /proc/self/fd/
crw-rw-rw-              0 full
crw-r-----              0 kmem
brw-r-----              0 loop0
brw-r-----              0 loop1
brw-r-----              0 loop2
brw-r-----              0 loop3
brw-r-----              0 loop4
brw-r-----              0 loop5
brw-r-----              0 loop6
brw-r-----              0 loop7
...

/media should however be empty, not contain files from /dev !!!



The SD-Card however is correct:

barebox:/ umount /mnt
barebox:/ detect mmc1
barebox:/ mount /dev/mmc1.0 /mnt/
barebox:/ ll /mnt/
drwxrwxrwx              0 .
drwxrwxrwx              0 ..
drwxr-xr-x           4096 bin
drwxr-xr-x           1024 boot
drwxr-xr-x           1024 dev
drwxr-xr-x           5120 etc
lrwxrwxrwx              9 home -> /opt/home
drwxr-xr-x           1024 lib
drwxr-xr-x           1024 media
drwxr-xr-x           1024 mnt
drwxr-xr-x           1024 opt
drwxr-xr-x           1024 proc
drwx------           1024 root
drwxr-xr-x           1024 run
drwxr-xr-x           3072 sbin
drwxr-xr-x           1024 srv
drwxr-xr-x           1024 sys
drwxrwxrwt           1024 tmp
drwxr-xr-x           1024 usr
drwxr-xr-x           1024 var

(also the /media there is empty). Similarly, when I mount the eMMC from
Linux, I also get the correct files:

root@my:~# mount /dev/mmcblk0p1 /mnt/
root@my:~# ll /mnt/
total 84
drwxr-xr-x  2 root root  4096 Aug 14 14:57 bin/
drwxr-xr-x  2 root root  4096 Aug 14 15:38 boot/
drwxr-xr-x  3 root root  4096 Aug 14 14:56 dev/
drwxr-xr-x 58 root root  4096 Aug 14 15:38 etc/
lrwxrwxrwx  1 root root     9 Aug 14 15:37 home -> /opt/home/
drwxr-xr-x 11 root root  4096 Aug 14 14:56 lib/
drwx------  2 root root 16384 Aug 14 16:07 lost+found/
drwxr-xr-x  3 root root  4096 Sep 30  2016 media/
drwxr-xr-x  2 root root  4096 Sep 30  2016 mnt/
drwxr-xr-x  2 root root  4096 Aug 14 14:58 opt/
drwxr-xr-x  2 root root  4096 Sep 30  2016 proc/
drwx------  4 root root  4096 Aug 14 15:01 root/
drwxr-xr-x  3 root root  4096 Aug 14 14:58 run/
drwxr-xr-x  2 root root  4096 Aug 14 15:02 sbin/
drwxr-xr-x  2 root root  4096 Sep 30  2016 srv/
drwxr-xr-x  2 root root  4096 Sep 30  2016 sys/
drwxrwxrwt  2 root root  4096 Aug 14 15:53 tmp/
drwxr-xr-x 10 root root  4096 Sep 30  2016 usr/
drwxr-xr-x 11 root root  4096 Sep 30  2016 var/


Questions:

* Did Linux 4.9.x or e2fsprogs 1.42.12-2+b1 from Debian Stretch use some
  partition flags / format that Barebox 2017.08.0 doesn't support?
* any ideas on how to debug this further?


Greetings,
Holger

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