> But it doesn't appear to me there's agreement on the way forward. vfsmounts > aren't going to do anything from what I can tell, but I could very well be > missing some detail. And Christian doesn't seem to want that as a solution. No, I really don't. I still think that it is fine to add a statx() flag indicating that a file is located on a subvolume. That allows interested userspace to bounce to an ioctl() where you can give it additional information in whatever form you like.
