On Thu, May 15, 2025 at 01:25:27PM +0200, Christian Brauner wrote: > Al, I want to kill this again and restore the pre v6.15 behavior. > Allowing mount propagation for detached trees was a crazy > idea on my part. It's a pain and it regresses userspace. If composefs is > broken by this then systemd will absolutely get broken by my change as > well. > > Something like this will allow to restore the status-quo: > -#define IS_MNT_NEW(m) (!(m)->mnt_ns) > +#define IS_MNT_NEW(m) (!(m)->mnt_ns || is_anon_ns((m)->mnt_ns)) FWIW, I'm not sure that ever had been quite correct, no matter how you call the macro. I'm not up to building a counterexample right now, will do in the morning...
