Index: sys/sysctl.h
===================================================================
RCS file: /cvs/src/sys/sys/sysctl.h,v
diff -u -p -r1.243 sysctl.h
--- sys/sysctl.h	5 Jul 2025 09:24:37 -0000	1.243
+++ sys/sysctl.h	14 Jul 2025 08:49:37 -0000
@@ -1054,7 +1054,7 @@ struct mbuf_queue;
 int sysctl_mq(int *, u_int, void *, size_t *, void *, size_t,
     struct mbuf_queue *);
 struct rtentry;
-int sysctl_dumpentry(struct rtentry *, void *, unsigned int);
+int sysctl_dumpentry(const struct rtentry *, void *, unsigned int);
 int sysctl_rtable(int *, u_int, void *, size_t *, void *, size_t);
 int sysctl_clockrate(char *, size_t *, void *);
 #if defined(GPROF) || defined(DDBPROF)
Index: net/rtable.c
===================================================================
RCS file: /cvs/src/sys/net/rtable.c,v
diff -u -p -r1.92 rtable.c
--- net/rtable.c	10 Jul 2025 05:28:13 -0000	1.92
+++ net/rtable.c	14 Jul 2025 08:49:37 -0000
@@ -783,6 +783,37 @@ rtable_walk(unsigned int rtableid, sa_fa
 	return (error);
 }
 
+int
+rtable_read(unsigned int rtableid, sa_family_t af,
+    int (*func)(const struct rtentry *, void *, unsigned int), void *arg)
+{
+	struct rtable			*tbl;
+	struct art_iter			 ai;
+	struct art_node			*an;
+	int				 error;
+
+	tbl = rtable_get(rtableid, af);
+	if (tbl == NULL)
+		return (EAFNOSUPPORT);
+
+	rw_enter_write(&tbl->r_lock);
+	ART_FOREACH(an, tbl->r_art, &ai) {
+		struct rtentry *rt;
+		for (rt = SMR_PTR_GET_LOCKED(&an->an_value); rt != NULL;
+		    rt = SMR_PTR_GET_LOCKED(&rt->rt_next)) {
+			error = func(rt, arg, rtableid);
+			if (error != 0) {
+				art_iter_close(&ai);
+				goto leave;
+			}
+		}
+	}
+leave:
+	rw_exit_write(&tbl->r_lock);
+
+	return (error);
+}
+
 struct rtentry *
 rtable_iterate(struct rtentry *rt0)
 {
Index: net/rtable.h
===================================================================
RCS file: /cvs/src/sys/net/rtable.h,v
diff -u -p -r1.34 rtable.h
--- net/rtable.h	10 Jul 2025 05:28:13 -0000	1.34
+++ net/rtable.h	14 Jul 2025 08:49:37 -0000
@@ -69,6 +69,9 @@ int		 rtable_delete(unsigned int, const 
 		     const struct sockaddr *, struct rtentry *);
 int		 rtable_walk(unsigned int, sa_family_t, struct rtentry **,
 		     int (*)(struct rtentry *, void *, unsigned int), void *);
+int		 rtable_read(unsigned int, sa_family_t,
+		     int (*)(const struct rtentry *, void *, unsigned int),
+		     void *);
 
 int		 rtable_mpath_capable(unsigned int, sa_family_t);
 int		 rtable_mpath_reprio(unsigned int, struct sockaddr *, int,
Index: net/rtsock.c
===================================================================
RCS file: /cvs/src/sys/net/rtsock.c,v
diff -u -p -r1.385 rtsock.c
--- net/rtsock.c	7 Jul 2025 02:28:50 -0000	1.385
+++ net/rtsock.c	14 Jul 2025 08:49:37 -0000
@@ -1955,7 +1955,7 @@ rtm_proposal(struct ifnet *ifp, struct r
  * This is used in dumping the kernel table via sysctl().
  */
 int
-sysctl_dumpentry(struct rtentry *rt, void *v, unsigned int id)
+sysctl_dumpentry(const struct rtentry *rt, void *v, unsigned int id)
 {
 	struct walkarg		*w = v;
 	int			 error = 0, size;
@@ -2231,8 +2231,7 @@ sysctl_rtable(int *name, u_int namelen, 
 			if (af != 0 && af != i)
 				continue;
 
-			error = rtable_walk(tableid, i, NULL, sysctl_dumpentry,
-			    &w);
+			error = rtable_read(tableid, i, sysctl_dumpentry, &w);
 			if (error == EAFNOSUPPORT)
 				error = 0;
 			if (error)