diff --git a/drivers/net/tun.c b/drivers/net/tun.c
index 589f0ca..94622e5 100644
--- a/drivers/net/tun.c
+++ b/drivers/net/tun.c
@@ -874,6 +874,8 @@
 
 	dev = __dev_get_by_name(net, ifr->ifr_name);
 	if (dev) {
+		if (ifr->ifr_flags & IFF_TUN_EXCL)
+			return -EBUSY;
 		if ((ifr->ifr_flags & IFF_TUN) && dev->netdev_ops == &tun_netdev_ops)
 			tun = netdev_priv(dev);
 		else if ((ifr->ifr_flags & IFF_TAP) && dev->netdev_ops == &tap_netdev_ops)
diff --git a/include/linux/if_tun.h b/include/linux/if_tun.h
index 049d6c9..915ba57 100644
--- a/include/linux/if_tun.h
+++ b/include/linux/if_tun.h
@@ -55,6 +55,7 @@
 #define IFF_NO_PI	0x1000
 #define IFF_ONE_QUEUE	0x2000
 #define IFF_VNET_HDR	0x4000
+#define IFF_TUN_EXCL	0x8000
 
 /* Features for GSO (TUNSETOFFLOAD). */
 #define TUN_F_CSUM	0x01	/* You can hand me unchecksummed packets. */