There is a tool btrfsck but it will only tell you your file system is broken. It won't fix it. A working btrfsck has been promised since the begging of time but appears to have fallen by the wayside. That is a blocker for Fedora to make btrfs the default but that hasn't stopped others like Oracle. If your FS is borked there are things you can try though I don't remember the links off the top of my head.But I would try btrfsck first to see what it has to say.