216 	if (upperdvp != NULLVP) {  in union_parsepath()
225 	if (lowerdvp != NULLVP) {  in union_parsepath()
344 		if (dvp == NULLVP)  in union_lookup()
360 	uppervp = NULLVP;  in union_lookup()
361 	lowervp = NULLVP;  in union_lookup()
370 	if (upperdvp != NULLVP) {  in union_lookup()
376 			} else if (lowerdvp != NULLVP) {  in union_lookup()
394 	if (lowerdvp != NULLVP && !iswhiteout) {  in union_lookup()
426 		if ((cnp->cn_flags & ISDOTDOT) && dun->un_pvp != NULLVP) {  in union_lookup()
428 			if (lowervp != NULLVP) {  in union_lookup()
473 	*ap->a_vpp = NULLVP;  in union_lookup()
499 					if (lowervp != NULLVP)  in union_lookup()
505 				if (lowervp != NULLVP) {  in union_lookup()
507 					lowervp = NULLVP;  in union_lookup()
517 	if (lowervp != NULLVP)  in union_lookup()
524 		if (uppervp != NULLVP)  in union_lookup()
526 		if (lowervp != NULLVP)  in union_lookup()
547 	if (dvp != NULLVP) {  in union_create()
559 		error = union_allocvp(ap->a_vpp, mp, NULLVP, NULLVP, cnp, vp,  in union_create()
560 				NULLVP, 1);  in union_create()
580 	if (un->un_uppervp == NULLVP)  in union_whiteout()
599 	if (dvp != NULLVP) {  in union_mknod()
609 		error = union_allocvp(ap->a_vpp, mp, NULLVP, NULLVP,  in union_mknod()
610 				      cnp, vp, NULLVP, 1);  in union_mknod()
639 	if (tvp == NULLVP) {  in union_open()
702 	if (vp != NULLVP) {  in union_close()
711 	KASSERT(vp != NULLVP);  in union_close()
780 	if (un->un_uppervp == NULLVP &&  in union_access()
792 	if ((vp = un->un_uppervp) != NULLVP) {  in union_access()
797 	if ((vp = un->un_lowervp) != NULLVP) {  in union_access()
851 	if (vp != NULLVP) {  in union_getattr()
859 	if (vp == NULLVP) {  in union_getattr()
863 		if (vp != NULLVP)  in union_getattr()
866 		vp = NULLVP;  in union_getattr()
869 	if (vp != NULLVP) {  in union_getattr()
947 	if ((un->un_uppervp == NULLVP) &&  in union_setattr()
961 	if (un->un_uppervp != NULLVP) {  in union_setattr()
968 		KASSERT(un->un_lowervp != NULLVP);  in union_setattr()
1045 	if (vp == NULLVP) {  in union_write()
1167 	if (targetvp != NULLVP) {  in union_fsync()
1210 	if (dun->un_uppervp == NULLVP)  in union_remove()
1213 	if (un->un_uppervp != NULLVP) {  in union_remove()
1257 		if (un->un_uppervp == NULLVP) {  in union_link()
1280 				vp  = NULLVP;  in union_link()
1281 				if (dun->un_uppervp == NULLVP)  in union_link()
1288 				if (vp != NULLVP) {  in union_link()
1305 	if (dvp == NULLVP)  in union_link()
1339 		if (un->un_uppervp == NULLVP) {  in union_rename()
1356 		if (un->un_uppervp == NULLVP) {  in union_rename()
1362 		if (un->un_lowervp != NULLVP)  in union_rename()
1371 		if (un->un_uppervp == NULLVP) {  in union_rename()
1386 	if (tvp != NULLVP && tvp->v_op == union_vnodeop_p) {  in union_rename()
1390 		if (tvp != NULLVP) {  in union_rename()
1400 	if (tvp != NULLVP)  in union_rename()
1434 	if (dvp != NULLVP) {  in union_mkdir()
1446 				NULLVP, cnp, vp, NULLVP, 1);  in union_mkdir()
1468 	if (dun->un_uppervp == NULLVP)  in union_rmdir()
1477 	if (un->un_uppervp != NULLVP) {  in union_rmdir()
1513 	if (dvp != NULLVP) {  in union_symlink()
1548 		KASSERT(un->un_uppervp == NULLVP);  in union_readdir()
1549 		KASSERT(un->un_lowervp != NULLVP);  in union_readdir()
1556 	if (vp == NULLVP)  in union_readdir()
1631 		for (vpp = un->un_dircache; *vpp != NULLVP; vpp++)  in union_inactive()
1781 	if (UPPERVP(vp) != NULLVP)  in union_print()
1783 	if (LOWERVP(vp) != NULLVP)  in union_print()
1787 		for (vpp = VTOUNION(vp)->un_dircache; *vpp != NULLVP; vpp++)  in union_print()
1862 	KASSERT(ovp != NULLVP);  in union_strategy()
1879 	KASSERT(ovp != NULLVP);  in union_bwrite()