On Tue, 2018-10-02 at 12:20 +0200, Laurent Vivier wrote: > v2: no new namespace, binfmt_misc data are now part of > the mount namespace > I put this in mount namespace instead of user namespace > because the mount namespace is already needed and > I don't want to force to have the user namespace for that. > As this is a filesystem, it seems logic to have it here. > > This allows to define a new interpreter for each new container. > > But the main goal is to be able to chroot to a directory > using a binfmt_misc interpreter without being root. Reading all this, I don't quite understand why this works for me and not for you (I think I get from your explanation that it doesn't work for you, but I might have missed something): jejb@jarvis:~> uname -m x86_64 jejb@jarvis:~> unshare -r -m root@jarvis:~# chroot /home/jejb/containers/aarch64 jarvis:/ # uname -m aarch64 Of course to get that to work I have an 'F' entry in /etc/binfmt.d/qemu-aarch64.conf Which means I'm running the host emulator in the container, which is what I want to do. I think another goal of the patches might be to use different emulators for different aarch64 containers? Do you have a use case for this, because right at the moment for arch emulation containers I think a single host wide entry per static emulator is the right approach. James
