another mount -a problem, not related to btrfs

[Stanislav Brabec <sbrabec@suse.cz>]

Dne 3.2.2016 v 18:00 Stanislav Brabec napsal(a):
> Stanislav Brabec wrote:
>> (rw,relatime,space_cache,subvolid=258,subvol=/d0/dd0/ddd0/d2/dd2/ddd2/s3/bind-mnt)
>>
>
> After a discussion with David, we came to the conclusion that the
> problem is caused by bug in the mountinfo provided by kernel:
>
While working on a fix, I found a new bug, not related to btrfs:

truncate -s10M source.img
mkdir -p /source/subdir
mkdir -p /dest
/sbin/mkfs.ext4 source.img
losetup /dev/loop0 $PWD/source.img
echo "/dev/loop0 /source ext4 defaults 0 0" >>/etc/fstab
mount -a
mkdir -p /source/subdir
mount -o bind /source /dest
echo "/source/subdir /dest auto bind 0 0" >>/etc/fstab
mount -a

Got:
/dev/loop0 on /source type ext4 (rw,relatime,data=ordered)
/dev/loop0 on /dest type ext4 (rw,relatime,data=ordered)
/dev/loop0 on /dest type ext4 (rw,relatime,data=ordered)
/dev/loop0 on /source type ext4 (rw,relatime,data=ordered)
and empty /source

It apparently should not happen.

-- 
Best Regards / S pozdravem,

Stanislav Brabec
software developer
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