BTRFS_UUID_TREE_OBJECTID
case BTRFS_UUID_TREE_OBJECTID:
location.objectid = BTRFS_UUID_TREE_OBJECTID;
{ .id = BTRFS_UUID_TREE_OBJECTID, DEFINE_NAME("uuid") },
{ BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" },
uuid_root = btrfs_create_tree(trans, BTRFS_UUID_TREE_OBJECTID);
{ BTRFS_UUID_TREE_OBJECTID, "UUID_TREE" }, \