55 #define	NULL_NHASH(vp) (&null_node_hashtbl[vfs_hash_index(vp) & null_hash_mask])  argument
97 	struct vnode *vp;  in null_hashget_locked()  local
117 			vp = NULLTOV(a);  in null_hashget_locked()
118 			vref(vp);  in null_hashget_locked()
119 			return (vp);  in null_hashget_locked()
129 	struct vnode *vp;  in null_hashget()  local
136 	vp = null_hashget_locked(mp, lowervp);  in null_hashget()
139 	return (vp);  in null_hashget()
166 null_destroy_proto(struct vnode *vp, void *xp)  in null_destroy_proto()  argument
169 	lockmgr(&vp->v_lock, LK_EXCLUSIVE, NULL);  in null_destroy_proto()
170 	VI_LOCK(vp);  in null_destroy_proto()
171 	vp->v_data = NULL;  in null_destroy_proto()
172 	vp->v_vnlock = &vp->v_lock;  in null_destroy_proto()
173 	vp->v_op = &dead_vnodeops;  in null_destroy_proto()
174 	VI_UNLOCK(vp);  in null_destroy_proto()
175 	vgone(vp);  in null_destroy_proto()
176 	vput(vp);  in null_destroy_proto()
182  * Vp is the alias vnode, lowervp is the lower vnode.
192 	struct vnode *vp;  in null_nodeget()  local
213 	error = getnewvnode("nullfs", mp, &null_vnodeops, &vp);  in null_nodeget()
220 	VNPASS(vp->v_object == NULL, vp);  in null_nodeget()
221 	VNPASS((vn_irflag_read(vp) & VIRF_PGREAD) == 0, vp);  in null_nodeget()
224 	xp->null_vnode = vp;  in null_nodeget()
227 	vp->v_type = lowervp->v_type;  in null_nodeget()
228 	vp->v_data = xp;  in null_nodeget()
229 	vp->v_vnlock = lowervp->v_vnlock;  in null_nodeget()
234 		null_destroy_proto(vp, xp);  in null_nodeget()
245 		vp->v_object = lowervp->v_object;  in null_nodeget()
246 		vn_irflag_set(vp, VIRF_PGREAD);  in null_nodeget()
249 		vp->v_vflag |= VV_ROOT;  in null_nodeget()
251 	error = insmntque1(vp, mp);  in null_nodeget()
255 		vp->v_object = NULL;  in null_nodeget()
256 		null_destroy_proto(vp, xp);  in null_nodeget()
261 	vn_set_state(vp, VSTATE_CONSTRUCTED);  in null_nodeget()
263 	*vpp = vp;  in null_nodeget()
283 null_checkvp(struct vnode *vp, char *fil, int lno)  in null_checkvp()  argument
285 	struct null_node *a = VTONULL(vp);  in null_checkvp()
292 	if (vp->v_op != null_vnodeop_p) {  in null_checkvp()
299 		panic("null_checkvp %p", vp);  in null_checkvp()
303 		panic ("null with unref'ed lowervp, vp %p lvp %p",  in null_checkvp()
304 		    vp, a->null_lowervp);  in null_checkvp()