diff --git a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c.new
--- a/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c
+++ b/sys/contrib/openzfs/module/os/freebsd/zfs/zfs_vnops_os.c.new
@@ -6240,9 +6240,26 @@
 	struct vnode *outvp = ap->a_outvp;
 	struct mount *mp;
 	struct uio io;
-	int error;
+	int error, error2;
 	uint64_t len = *ap->a_lenp;
+	zfsvfs_t *outzfsvfs;
+	objset_t *outos;
+	bool done_startwrite;
 
+	error2 = 0;
+	mp = NULL;
+	error = vn_start_write(outvp, &mp, V_WAIT);
+	done_startwrite = true;
+	if (error == 0 && mp == outvp->v_mount) {
+		outzfsvfs = (zfsvfs_t *)mp->mnt_data;
+		outos = outzfsvfs->z_os;
+		if (!spa_feature_is_enabled(dmu_ojset_spa(outos),
+		    SPA_FEATURE_BLOCK_CLONING)) {
+			vn_finished_write(mp);
+			goto do_generic;
+		}
+	}
+
 	/*
 	 * TODO: If offset/length is not aligned to recordsize, use
 	 * vn_generic_copy_file_range() on this fragment.
@@ -6252,8 +6269,10 @@
 
 	/* Lock both vnodes, avoiding risk of deadlock. */
 	do {
-		mp = NULL;
-		error = vn_start_write(outvp, &mp, V_WAIT);
+		if (!done_startwrite) {
+			mp = NULL;
+			error = vn_start_write(outvp, &mp, V_WAIT);
+		}
 		if (error == 0) {
 			error = vn_lock(outvp, LK_EXCLUSIVE);
 			if (error == 0) {
@@ -6273,6 +6292,7 @@
 		}
 		if (mp != NULL)
 			vn_finished_write(mp);
+		done_startwrite = false;
 	} while (error == 0);
 	if (error != 0)
 		return (error);
@@ -6289,7 +6309,7 @@
 	if (error != 0)
 		goto unlock;
 
-	error = zfs_clone_range(VTOZ(invp), ap->a_inoffp, VTOZ(outvp),
+	error = error2 = zfs_clone_range(VTOZ(invp), ap->a_inoffp, VTOZ(outvp),
 	    ap->a_outoffp, &len, ap->a_outcred);
 	*ap->a_lenp = (size_t)len;
 
@@ -6299,6 +6319,17 @@
 	VOP_UNLOCK(outvp);
 	if (mp != NULL)
 		vn_finished_write(mp);
+
+	/*
+	 * Fall back if block_cloning is disabled
+	 * or other EXDEV failures from zfs_vnops.c
+	 */
+	if (error2 == EXDEV) {
+do_generic:
+		error = vn_generic_copy_file_range(ap->a_invp, ap->a_inoffp,
+		    ap->a_outvp, ap->a_outoffp, ap->a_lenp, ap->a_flags,
+		    ap->a_incred, ap->a_outcred, ap->a_fsizetd);
+	}
 
 	return (error);
 }