On 19:54 10/02, Graham Cobb wrote: > On 10/02/2022 16:51, Goldwyn Rodrigues wrote: > > If a read-write root mount is remounted as read-only, the subvolume > > is also set to read-only. > > Errrr... Isn't that exactly what I want? > > If I have a btrfs filesystem with hundreds of subvols, some of which may > be mounted into various places in my filesystem, I would expect that if > I remount the main mountpoint as RO, that all the subvols become RO as > well. I actually don't mind if the behaviour went further and remounting > ANY of the mount points as RO would make them all RO. > > My mental model is that mounting a subvol somewhere is rather like a > bind mount. And a bind mount goes RO if the underlying fs goes RO - > doesn't it? > If we want bind mount, we would use bind mount. subvolume mounts and bind mounts are different and should be treated as different features. > Or am I just confused about what this patch is discussing? Root can also be considered as a unique subvolume with a unique subvolume id and a unique name=/ -- Goldwyn
