ext4_dir_htree_level
if (add_level && levels == ext4_dir_htree_level(sb)) {
if (ext4_dir_htree_level(sb) < EXT4_HTREE_LEVEL) {
if (indirect >= ext4_dir_htree_level(dir->i_sb)) {
ext4_dir_htree_level(dir->i_sb));
if (ext4_dir_htree_level(dir->i_sb) < EXT4_HTREE_LEVEL) {