df_dotdot
dff->df_dotdot = dir;
file->df_dotdot = pn_dir;
df->df_dotdot = NULL;
pn = df->df_dotdot;
dff->df_dotdot = NULL;
if (df->df_dotdot == NULL)
assert(df->df_dotdot->pn_va.va_type == VDIR);
puffs_newinfo_setcookie(pni, df->df_dotdot);
puffs_newinfo_setvtype(pni, df->df_dotdot->pn_va.va_type);