Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dir.c
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dir.c
+++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dsl_dir.c
@@ -1888,6 +1888,13 @@
 		}
 	}
 
+	error = zvol_check_open(ddra->ddra_oldname);
+	if (error != 0) {
+		dsl_dir_rele(newparent, FTAG);
+		dsl_dir_rele(dd, FTAG);
+		return (error);
+	}
+
 	dsl_dir_rele(newparent, FTAG);
 	dsl_dir_rele(dd, FTAG);
 	return (0);
Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zvol.h
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zvol.h
+++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/sys/zvol.h
@@ -36,6 +36,7 @@
 #define	ZVOL_ZAP_OBJ		2ULL
 
 #ifdef _KERNEL
+extern int zvol_check_open(const char *);
 extern int zvol_check_volsize(uint64_t volsize, uint64_t blocksize);
 extern int zvol_check_volblocksize(uint64_t volblocksize);
 extern int zvol_get_stats(objset_t *os, nvlist_t *nv);
Index: sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c
===================================================================
--- sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c
+++ sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c
@@ -3062,6 +3062,24 @@
 	PICKUP_GIANT();
 }
 
+int
+zvol_check_open(const char *name)
+{
+	zvol_state_t *zv;
+	int rc;
+
+	mutex_enter(&zfsdev_state_lock);
+	if ((zv = zvol_minor_lookup(name)) == NULL) {
+		mutex_exit(&zfsdev_state_lock);
+		return (SET_ERROR(ENXIO));
+	}
+	rc = zv->zv_total_opens;
+	mutex_exit(&zfsdev_state_lock);
+	if (rc > 0)
+		return (SET_ERROR(EBUSY));
+	return (0);
+}
+
 static int
 zvol_d_open(struct cdev *dev, int flags, int fmt, struct thread *td)
 {