Tl;dr tried nearly everything, couldn't get it to recover, gave up and restored my old backup. I was running the newest Archlinux kernel release.
.. Extracting data with Btrfs restore was quite useless, Btrfs find root didn't list any object id's either, which I was unsure why. I guess I was just unlucky or the utility got changed since all the other people I've seen had used it. Still have a full dd image of the disk that I'll keep for a week or so, and a Btrfs-image, if anyone is at all interested. -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html