Hi! I'm currently writing a btrfs-rescue tool and therefor began to study the btrfs-on-disk structures in detail. The root tree contains a ROOT_ITEM entry for *every* subvolume in the whole file system, but only DIR_ITEM entries for subvolumes that were created in the root directory of the filesystem. If we have a destroyed root directory, there is no way to access subvolumes stored deeper in the fs-tree by name. It might be nice to have the ability to mount a subvolume by object-id. A simple tool could list all available subvolumes with their object-ids, generation numbers, and so on. Greetings, Michael -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
