On Mon, Aug 02, 2021 at 02:18:29PM +1000, NeilBrown wrote: > For btrfs, the "location" is root.objectid ++ file.objectid. I think > the inode should become (file.objectid ^ swab64(root.objectid)). This > will provide numbers that are unique until you get very large subvols, > and very many subvols. If you snapshot a filesystem, I'd expect, at least by default, that inodes in the snapshot to stay the same as in the snapshotted filesystem. --b.
