VFSTOHFS
hmp = VFSTOHFS(mp);
hmp = VFSTOHFS(mp);
hmp = VFSTOHFS(mp);
hmp = VFSTOHFS(mp);
hmp = VFSTOHFS(mp);
vh = &VFSTOHFS(mp)->hm_vol.vh;
hmp = VFSTOHFS(mp);