LFSI_WRAPWAIT
if ((VTOI(ap->a_vp)->i_lfs_iflags & LFSI_WRAPWAIT))
VTOI(ap->a_vp)->i_lfs_iflags |= LFSI_WRAPWAIT;
VTOI(ap->a_vp)->i_lfs_iflags &= ~LFSI_WRAPWAIT;