BTRFS_BLOCK_GROUP_TREE_OBJECTID
case BTRFS_BLOCK_GROUP_TREE_OBJECTID:
case BTRFS_BLOCK_GROUP_TREE_OBJECTID:
location.objectid = BTRFS_BLOCK_GROUP_TREE_OBJECTID;
{ .id = BTRFS_BLOCK_GROUP_TREE_OBJECTID, DEFINE_NAME("block-group") },
{ BTRFS_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_TREE" },
{ BTRFS_BLOCK_GROUP_TREE_OBJECTID, "BLOCK_GROUP_TREE" },\