I have a BTRFS filesystem with a set of subvolumes in it. So far so good. I need to change the name of a subvolume, unfortunately the btrfs program does not allow me to rename a subvolume. Searching with Google has yielded some results, one said I can just mv, the other said I can just snapshot to a new name and delete the old subvolume. Before I crash my partition and have to reload it from the backup (it's quite large), my question is:

• What is the currently best way to rename a subvolume?
• Is it ok to just mv it, or will it invalidate some internal structures?
• Is making a new snapshot and removing the old subvolume the way to go, or has this some drawbacks?

I know everything is still experimental, but for my purposes it has been working quite well (so far, and I have incremental backups for each day).