Directory max size for virtual user under container
 

Hi. I am running Debian under virtual container. I need to set max size of directory for each of vsftpd virtual users - because they are virtual, I cannot use user quotas. I was wondering, if I could create images with filesystem and mount them, but I cannot access /dev/loop device from container. Is there any other way, how to set max directory size in virtual container?
Any help appreciated.

I remember reading about this, I will ask a friend and see if he has any ideas.

Thank you :)