On Tue, 10 May 2022 at 15:15, Miklos Szeredi <miklos@xxxxxxxxxx> wrote: > > On Tue, 10 May 2022 at 13:53, Christian Brauner <brauner@xxxxxxxxxx> wrote: > > > > What exactly are the attributes that systemd requires? > > > > We keep a repo with ideas for (kernel) extensions - we should probably > > publish that somewhere - but the list we used for a prototype roughly > > contains: > > > > * mount flags MOUNT_ATTR_RDONLY etc. > > * time flags MOUNT_ATTR_RELATIME etc. (could probably be combined with > > mount flags. We missed the opportunity to make them proper enums > > separate from other mount flags imho.) > > * propagation "flags" (MS_SHARED) > > * peer group > > * mnt_id of the mount > > * mnt_id of the mount's parent > > * owning userns > > Sounds good thus far. And hey, we don't even need a new syscall: > statx(2) could handle these fine. Oh, we need this indexed with a mount id, which statx can't do. So indeed, a new syscall may be the best choice. Thanks, Miklos
