Merge branch 'batman-adv/next' of git://git.open-mesh.org/ecsv/linux-merge

net/batman-adv/gateway_client.h

@@ -24,7 +24,7 @@
 
 void gw_deselect(struct bat_priv *bat_priv);
 void gw_election(struct bat_priv *bat_priv);
-void *gw_get_selected(struct bat_priv *bat_priv);
+struct orig_node *gw_get_selected_orig(struct bat_priv *bat_priv);
 void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node);
 void gw_node_update(struct bat_priv *bat_priv,
 		    struct orig_node *orig_node, uint8_t new_gwflags);

net/batman-adv/icmp_socket.c

@@ -218,23 +218,13 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
 	if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
 		goto dst_unreach;
 
-	rcu_read_lock();
 	orig_node = orig_hash_find(bat_priv, icmp_packet->dst);
-
 	if (!orig_node)
-		goto unlock;
-
-	neigh_node = orig_node->router;
+		goto dst_unreach;
 
+	neigh_node = orig_node_get_router(orig_node);
 	if (!neigh_node)
-		goto unlock;
-
-	if (!atomic_inc_not_zero(&neigh_node->refcount)) {
-		neigh_node = NULL;
-		goto unlock;
-	}
-
-	rcu_read_unlock();
+		goto dst_unreach;
 
 	if (!neigh_node->if_incoming)
 		goto dst_unreach;
@@ -252,8 +242,6 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
 	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
 	goto out;
 
-unlock:
-	rcu_read_unlock();
 dst_unreach:
 	icmp_packet->msg_type = DESTINATION_UNREACHABLE;
 	bat_socket_add_packet(socket_client, icmp_packet, packet_len);

net/batman-adv/originator.c

@@ -70,6 +70,21 @@ void neigh_node_free_ref(struct neigh_node *neigh_node)
 		call_rcu(&neigh_node->rcu, neigh_node_free_rcu);
 }
 
+/* increases the refcounter of a found router */
+struct neigh_node *orig_node_get_router(struct orig_node *orig_node)
+{
+	struct neigh_node *router;
+
+	rcu_read_lock();
+	router = rcu_dereference(orig_node->router);
+
+	if (router && !atomic_inc_not_zero(&router->refcount))
+		router = NULL;
+
+	rcu_read_unlock();
+	return router;
+}
+
 struct neigh_node *create_neighbor(struct orig_node *orig_node,
 				   struct orig_node *orig_neigh_node,
 				   uint8_t *neigh,
@@ -87,6 +102,7 @@ struct neigh_node *create_neighbor(struct orig_node *orig_node,
 
 	INIT_HLIST_NODE(&neigh_node->list);
 	INIT_LIST_HEAD(&neigh_node->bonding_list);
+	spin_lock_init(&neigh_node->tq_lock);
 
 	memcpy(neigh_node->addr, neigh, ETH_ALEN);
 	neigh_node->orig_node = orig_neigh_node;
@@ -390,7 +406,7 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 	struct hlist_node *node, *node_tmp;
 	struct hlist_head *head;
 	struct orig_node *orig_node;
-	struct neigh_node *neigh_node;
+	struct neigh_node *neigh_node, *neigh_node_tmp;
 	int batman_count = 0;
 	int last_seen_secs;
 	int last_seen_msecs;
@@ -421,37 +437,41 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
-			if (!orig_node->router)
+			neigh_node = orig_node_get_router(orig_node);
+			if (!neigh_node)
 				continue;
 
-			if (orig_node->router->tq_avg == 0)
-				continue;
+			if (neigh_node->tq_avg == 0)
+				goto next;
 
 			last_seen_secs = jiffies_to_msecs(jiffies -
 						orig_node->last_valid) / 1000;
 			last_seen_msecs = jiffies_to_msecs(jiffies -
 						orig_node->last_valid) % 1000;
 
-			neigh_node = orig_node->router;
 			seq_printf(seq, "%pM %4i.%03is   (%3i) %pM [%10s]:",
 				   orig_node->orig, last_seen_secs,
 				   last_seen_msecs, neigh_node->tq_avg,
 				   neigh_node->addr,
 				   neigh_node->if_incoming->net_dev->name);
 
-			hlist_for_each_entry_rcu(neigh_node, node_tmp,
+			hlist_for_each_entry_rcu(neigh_node_tmp, node_tmp,
 						 &orig_node->neigh_list, list) {
-				seq_printf(seq, " %pM (%3i)", neigh_node->addr,
-						neigh_node->tq_avg);
+				seq_printf(seq, " %pM (%3i)",
+					   neigh_node_tmp->addr,
+					   neigh_node_tmp->tq_avg);
 			}
 
 			seq_printf(seq, "\n");
 			batman_count++;
+
+next:
+			neigh_node_free_ref(neigh_node);
 		}
 		rcu_read_unlock();
 	}
 
-	if ((batman_count == 0))
+	if (batman_count == 0)
 		seq_printf(seq, "No batman nodes in range ...\n");
 
 	return 0;

net/batman-adv/originator.h

@@ -34,6 +34,7 @@ struct neigh_node *create_neighbor(struct orig_node *orig_node,
 				   uint8_t *neigh,
 				   struct hard_iface *if_incoming);
 void neigh_node_free_ref(struct neigh_node *neigh_node);
+struct neigh_node *orig_node_get_router(struct orig_node *orig_node);
 int orig_seq_print_text(struct seq_file *seq, void *offset);
 int orig_hash_add_if(struct hard_iface *hard_iface, int max_if_num);
 int orig_hash_del_if(struct hard_iface *hard_iface, int max_if_num);

net/batman-adv/send.c

@@ -308,6 +308,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
 			     struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
+	struct neigh_node *router;
 	unsigned char in_tq, in_ttl, tq_avg = 0;
 	unsigned long send_time;
 
@@ -316,6 +317,8 @@ void schedule_forward_packet(struct orig_node *orig_node,
 		return;
 	}
 
+	router = orig_node_get_router(orig_node);
+
 	in_tq = batman_packet->tq;
 	in_ttl = batman_packet->ttl;
 
@@ -324,20 +327,22 @@ void schedule_forward_packet(struct orig_node *orig_node,
 
 	/* rebroadcast tq of our best ranking neighbor to ensure the rebroadcast
 	 * of our best tq value */
-	if ((orig_node->router) && (orig_node->router->tq_avg != 0)) {
+	if (router && router->tq_avg != 0) {
 
 		/* rebroadcast ogm of best ranking neighbor as is */
-		if (!compare_eth(orig_node->router->addr, ethhdr->h_source)) {
-			batman_packet->tq = orig_node->router->tq_avg;
+		if (!compare_eth(router->addr, ethhdr->h_source)) {
+			batman_packet->tq = router->tq_avg;
 
-			if (orig_node->router->last_ttl)
-				batman_packet->ttl = orig_node->router->last_ttl
-							- 1;
+			if (router->last_ttl)
+				batman_packet->ttl = router->last_ttl - 1;
 		}
 
-		tq_avg = orig_node->router->tq_avg;
+		tq_avg = router->tq_avg;
 	}
 
+	if (router)
+		neigh_node_free_ref(router);
+
 	/* apply hop penalty */
 	batman_packet->tq = hop_penalty(batman_packet->tq, bat_priv);
 

net/batman-adv/soft-interface.c

@@ -90,10 +90,51 @@ static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
 		call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
 }
 
+static struct softif_neigh *softif_neigh_get_selected(struct bat_priv *bat_priv)
+{
+	struct softif_neigh *neigh;
+
+	rcu_read_lock();
+	neigh = rcu_dereference(bat_priv->softif_neigh);
+
+	if (neigh && !atomic_inc_not_zero(&neigh->refcount))
+		neigh = NULL;
+
+	rcu_read_unlock();
+	return neigh;
+}
+
+static void softif_neigh_select(struct bat_priv *bat_priv,
+				struct softif_neigh *new_neigh)
+{
+	struct softif_neigh *curr_neigh;
+
+	spin_lock_bh(&bat_priv->softif_neigh_lock);
+
+	if (new_neigh && !atomic_inc_not_zero(&new_neigh->refcount))
+		new_neigh = NULL;
+
+	curr_neigh = bat_priv->softif_neigh;
+	rcu_assign_pointer(bat_priv->softif_neigh, new_neigh);
+
+	if (curr_neigh)
+		softif_neigh_free_ref(curr_neigh);
+
+	spin_unlock_bh(&bat_priv->softif_neigh_lock);
+}
+
+static void softif_neigh_deselect(struct bat_priv *bat_priv)
+{
+	softif_neigh_select(bat_priv, NULL);
+}
+
 void softif_neigh_purge(struct bat_priv *bat_priv)
 {
-	struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+	struct softif_neigh *softif_neigh, *curr_softif_neigh;
 	struct hlist_node *node, *node_tmp;
+	char do_deselect = 0;
+
+	curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 
 	spin_lock_bh(&bat_priv->softif_neigh_lock);
 
@@ -105,22 +146,26 @@ void softif_neigh_purge(struct bat_priv *bat_priv)
 		    (atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE))
 			continue;
 
-		hlist_del_rcu(&softif_neigh->list);
-
-		if (bat_priv->softif_neigh == softif_neigh) {
+		if (curr_softif_neigh == softif_neigh) {
 			bat_dbg(DBG_ROUTES, bat_priv,
 				 "Current mesh exit point '%pM' vanished "
 				 "(vid: %d).\n",
 				 softif_neigh->addr, softif_neigh->vid);
-			softif_neigh_tmp = bat_priv->softif_neigh;
-			bat_priv->softif_neigh = NULL;
-			softif_neigh_free_ref(softif_neigh_tmp);
+			do_deselect = 1;
 		}
 
+		hlist_del_rcu(&softif_neigh->list);
 		softif_neigh_free_ref(softif_neigh);
 	}
 
 	spin_unlock_bh(&bat_priv->softif_neigh_lock);
+
+	/* soft_neigh_deselect() needs to acquire the softif_neigh_lock */
+	if (do_deselect)
+		softif_neigh_deselect(bat_priv);
+
+	if (curr_softif_neigh)
+		softif_neigh_free_ref(curr_softif_neigh);
 }
 
 static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
@@ -171,6 +216,7 @@ int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
 	struct bat_priv *bat_priv = netdev_priv(net_dev);
 	struct softif_neigh *softif_neigh;
 	struct hlist_node *node;
+	struct softif_neigh *curr_softif_neigh;
 
 	if (!bat_priv->primary_if) {
 		return seq_printf(seq, "BATMAN mesh %s disabled - "
@@ -180,14 +226,17 @@ int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
 
 	seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
 
+	curr_softif_neigh = softif_neigh_get_selected(bat_priv);
 	rcu_read_lock();
 	hlist_for_each_entry_rcu(softif_neigh, node,
 				 &bat_priv->softif_neigh_list, list)
 		seq_printf(seq, "%s %pM (vid: %d)\n",
-				bat_priv->softif_neigh == softif_neigh
+				curr_softif_neigh == softif_neigh
 				? "=>" : "  ", softif_neigh->addr,
 				softif_neigh->vid);
 	rcu_read_unlock();
+	if (curr_softif_neigh)
+		softif_neigh_free_ref(curr_softif_neigh);
 
 	return 0;
 }
@@ -198,7 +247,8 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 	struct bat_priv *bat_priv = netdev_priv(dev);
 	struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 	struct batman_packet *batman_packet;
-	struct softif_neigh *softif_neigh, *softif_neigh_tmp;
+	struct softif_neigh *softif_neigh;
+	struct softif_neigh *curr_softif_neigh = NULL;
 
 	if (ntohs(ethhdr->h_proto) == ETH_P_8021Q)
 		batman_packet = (struct batman_packet *)
@@ -223,7 +273,8 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 	if (!softif_neigh)
 		goto err;
 
-	if (bat_priv->softif_neigh == softif_neigh)
+	curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+	if (curr_softif_neigh == softif_neigh)
 		goto out;
 
 	/* we got a neighbor but its mac is 'bigger' than ours  */
@@ -232,38 +283,39 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 		goto out;
 
 	/* switch to new 'smallest neighbor' */
-	if ((bat_priv->softif_neigh) &&
-	    (memcmp(softif_neigh->addr, bat_priv->softif_neigh->addr,
+	if ((curr_softif_neigh) &&
+	    (memcmp(softif_neigh->addr, curr_softif_neigh->addr,
 							ETH_ALEN) < 0)) {
 		bat_dbg(DBG_ROUTES, bat_priv,
 			"Changing mesh exit point from %pM (vid: %d) "
 			"to %pM (vid: %d).\n",
-			 bat_priv->softif_neigh->addr,
-			 bat_priv->softif_neigh->vid,
+			 curr_softif_neigh->addr,
+			 curr_softif_neigh->vid,
 			 softif_neigh->addr, softif_neigh->vid);
-		softif_neigh_tmp = bat_priv->softif_neigh;
-		bat_priv->softif_neigh = softif_neigh;
-		softif_neigh_free_ref(softif_neigh_tmp);
-		/* we need to hold the additional reference */
-		goto err;
+
+		softif_neigh_select(bat_priv, softif_neigh);
+		goto out;
 	}
 
 	/* close own batX device and use softif_neigh as exit node */
-	if ((!bat_priv->softif_neigh) &&
+	if ((!curr_softif_neigh) &&
 	    (memcmp(softif_neigh->addr,
 		    bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN) < 0)) {
 		bat_dbg(DBG_ROUTES, bat_priv,
 			"Setting mesh exit point to %pM (vid: %d).\n",
 			softif_neigh->addr, softif_neigh->vid);
-		bat_priv->softif_neigh = softif_neigh;
-		/* we need to hold the additional reference */
-		goto err;
+
+		softif_neigh_select(bat_priv, softif_neigh);
+		goto out;
 	}
 
 out:
 	softif_neigh_free_ref(softif_neigh);
 err:
 	kfree_skb(skb);
+	if (curr_softif_neigh)
+		softif_neigh_free_ref(curr_softif_neigh);
+
 	return;
 }
 
@@ -321,6 +373,7 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 	struct bat_priv *bat_priv = netdev_priv(soft_iface);
 	struct bcast_packet *bcast_packet;
 	struct vlan_ethhdr *vhdr;
+	struct softif_neigh *curr_softif_neigh = NULL;
 	int data_len = skb->len, ret;
 	short vid = -1;
 	bool do_bcast = false;
@@ -348,7 +401,8 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 	 * if we have a another chosen mesh exit node in range
 	 * it will transport the packets to the mesh
 	 */
-	if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid))
+	curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+	if ((curr_softif_neigh) && (curr_softif_neigh->vid == vid))
 		goto dropped;
 
 	/* TODO: check this for locks */
@@ -410,6 +464,8 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 dropped_freed:
 	bat_priv->stats.tx_dropped++;
 end:
+	if (curr_softif_neigh)
+		softif_neigh_free_ref(curr_softif_neigh);
 	return NETDEV_TX_OK;
 }
 
@@ -421,6 +477,7 @@ void interface_rx(struct net_device *soft_iface,
 	struct unicast_packet *unicast_packet;
 	struct ethhdr *ethhdr;
 	struct vlan_ethhdr *vhdr;
+	struct softif_neigh *curr_softif_neigh = NULL;
 	short vid = -1;
 	int ret;
 
@@ -450,7 +507,8 @@ void interface_rx(struct net_device *soft_iface,
 	 * if we have a another chosen mesh exit node in range
 	 * it will transport the packets to the non-mesh network
 	 */
-	if ((bat_priv->softif_neigh) && (bat_priv->softif_neigh->vid == vid)) {
+	curr_softif_neigh = softif_neigh_get_selected(bat_priv);
+	if (curr_softif_neigh && (curr_softif_neigh->vid == vid)) {
 		skb_push(skb, hdr_size);
 		unicast_packet = (struct unicast_packet *)skb->data;
 
@@ -461,7 +519,7 @@ void interface_rx(struct net_device *soft_iface,
 		skb_reset_mac_header(skb);
 
 		memcpy(unicast_packet->dest,
-		       bat_priv->softif_neigh->addr, ETH_ALEN);
+		       curr_softif_neigh->addr, ETH_ALEN);
 		ret = route_unicast_packet(skb, recv_if);
 		if (ret == NET_RX_DROP)
 			goto dropped;
@@ -486,11 +544,13 @@ void interface_rx(struct net_device *soft_iface,
 	soft_iface->last_rx = jiffies;
 
 	netif_rx(skb);
-	return;
+	goto out;
 
 dropped:
 	kfree_skb(skb);
 out:
+	if (curr_softif_neigh)
+		softif_neigh_free_ref(curr_softif_neigh);
 	return;
 }
 
@@ -524,6 +584,7 @@ static void interface_setup(struct net_device *dev)
 	dev->hard_start_xmit = interface_tx;
 #endif
 	dev->destructor = free_netdev;
+	dev->tx_queue_len = 0;
 
 	/**
 	 * can't call min_mtu, because the needed variables

net/batman-adv/types.h

@@ -67,7 +67,7 @@ struct hard_iface {
 struct orig_node {
 	uint8_t orig[ETH_ALEN];
 	uint8_t primary_addr[ETH_ALEN];
-	struct neigh_node *router;
+	struct neigh_node __rcu *router; /* rcu protected pointer */
 	unsigned long *bcast_own;
 	uint8_t *bcast_own_sum;
 	unsigned long last_valid;
@@ -83,7 +83,7 @@ struct orig_node {
 	uint32_t last_bcast_seqno;
 	struct hlist_head neigh_list;
 	struct list_head frag_list;
-	spinlock_t neigh_list_lock; /* protects neighbor list */
+	spinlock_t neigh_list_lock; /* protects neigh_list and router */
 	atomic_t refcount;
 	struct rcu_head rcu;
 	struct hlist_node hash_entry;
@@ -125,6 +125,7 @@ struct neigh_node {
 	struct rcu_head rcu;
 	struct orig_node *orig_node;
 	struct hard_iface *if_incoming;
+	spinlock_t tq_lock;	/* protects: tq_recv, tq_index */
 };
 
 
@@ -146,7 +147,7 @@ struct bat_priv {
 	atomic_t batman_queue_left;
 	char num_ifaces;
 	struct hlist_head softif_neigh_list;
-	struct softif_neigh *softif_neigh;
+	struct softif_neigh __rcu *softif_neigh;
 	struct debug_log *debug_log;
 	struct hard_iface *primary_if;
 	struct kobject *mesh_obj;

net/batman-adv/unicast.c

@@ -289,7 +289,7 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
 
 	/* get routing information */
 	if (is_multicast_ether_addr(ethhdr->h_dest)) {
-		orig_node = (struct orig_node *)gw_get_selected(bat_priv);
+		orig_node = (struct orig_node *)gw_get_selected_orig(bat_priv);
 		if (orig_node)
 			goto find_router;
 	}

net/batman-adv/vis.c

@@ -558,6 +558,7 @@ static int find_best_vis_server(struct bat_priv *bat_priv,
 				struct vis_info *info)
 {
 	struct hashtable_t *hash = bat_priv->orig_hash;
+	struct neigh_node *router;
 	struct hlist_node *node;
 	struct hlist_head *head;
 	struct orig_node *orig_node;
@@ -571,13 +572,17 @@ static int find_best_vis_server(struct bat_priv *bat_priv,
 
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
-			if ((orig_node) && (orig_node->router) &&
-			    (orig_node->flags & VIS_SERVER) &&
-			    (orig_node->router->tq_avg > best_tq)) {
-				best_tq = orig_node->router->tq_avg;
+			router = orig_node_get_router(orig_node);
+			if (!router)
+				continue;
+
+			if ((orig_node->flags & VIS_SERVER) &&
+			    (router->tq_avg > best_tq)) {
+				best_tq = router->tq_avg;
 				memcpy(packet->target_orig, orig_node->orig,
 				       ETH_ALEN);
 			}
+			neigh_node_free_ref(router);
 		}
 		rcu_read_unlock();
 	}
@@ -605,7 +610,7 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 	struct hlist_node *node;
 	struct hlist_head *head;
 	struct orig_node *orig_node;
-	struct neigh_node *neigh_node;
+	struct neigh_node *router;
 	struct vis_info *info = (struct vis_info *)bat_priv->my_vis_info;
 	struct vis_packet *packet = (struct vis_packet *)info->skb_packet->data;
 	struct vis_info_entry *entry;
@@ -633,30 +638,32 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
-			neigh_node = orig_node->router;
-
-			if (!neigh_node)
+			router = orig_node_get_router(orig_node);
+			if (!router)
 				continue;
 
-			if (!compare_eth(neigh_node->addr, orig_node->orig))
-				continue;
+			if (!compare_eth(router->addr, orig_node->orig))
+				goto next;
 
-			if (neigh_node->if_incoming->if_status != IF_ACTIVE)
-				continue;
+			if (router->if_incoming->if_status != IF_ACTIVE)
+				goto next;
 
-			if (neigh_node->tq_avg < 1)
-				continue;
+			if (router->tq_avg < 1)
+				goto next;
 
 			/* fill one entry into buffer. */
 			entry = (struct vis_info_entry *)
 				      skb_put(info->skb_packet, sizeof(*entry));
 			memcpy(entry->src,
-			       neigh_node->if_incoming->net_dev->dev_addr,
+			       router->if_incoming->net_dev->dev_addr,
 			       ETH_ALEN);
 			memcpy(entry->dest, orig_node->orig, ETH_ALEN);
-			entry->quality = neigh_node->tq_avg;
+			entry->quality = router->tq_avg;
 			packet->entries++;
 
+next:
+			neigh_node_free_ref(router);
+
 			if (vis_packet_full(info))
 				goto unlock;
 		}
@@ -725,6 +732,7 @@ static void purge_vis_packets(struct bat_priv *bat_priv)
 static void broadcast_vis_packet(struct bat_priv *bat_priv,
 				 struct vis_info *info)
 {
+	struct neigh_node *router;
 	struct hashtable_t *hash = bat_priv->orig_hash;
 	struct hlist_node *node;
 	struct hlist_head *head;
@@ -745,19 +753,26 @@ static void broadcast_vis_packet(struct bat_priv *bat_priv,
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
 			/* if it's a vis server and reachable, send it. */
-			if ((!orig_node) || (!orig_node->router))
-				continue;
 			if (!(orig_node->flags & VIS_SERVER))
 				continue;
+
+			router = orig_node_get_router(orig_node);
+			if (!router)
+				continue;
+
 			/* don't send it if we already received the packet from
-			* this node. */
+			 * this node. */
 			if (recv_list_is_in(bat_priv, &info->recv_list,
-					    orig_node->orig))
+					    orig_node->orig)) {
+				neigh_node_free_ref(router);
 				continue;
+			}
 
 			memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
-			hard_iface = orig_node->router->if_incoming;
-			memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+			hard_iface = router->if_incoming;
+			memcpy(dstaddr, router->addr, ETH_ALEN);
+
+			neigh_node_free_ref(router);
 
 			skb = skb_clone(info->skb_packet, GFP_ATOMIC);
 			if (skb)
@@ -772,45 +787,29 @@ static void unicast_vis_packet(struct bat_priv *bat_priv,
 			       struct vis_info *info)
 {
 	struct orig_node *orig_node;
-	struct neigh_node *neigh_node = NULL;
+	struct neigh_node *router = NULL;
 	struct sk_buff *skb;
 	struct vis_packet *packet;
 
 	packet = (struct vis_packet *)info->skb_packet->data;
 
-	rcu_read_lock();
 	orig_node = orig_hash_find(bat_priv, packet->target_orig);
-
 	if (!orig_node)
-		goto unlock;
+		goto out;
 
-	neigh_node = orig_node->router;
-
-	if (!neigh_node)
-		goto unlock;
-
-	if (!atomic_inc_not_zero(&neigh_node->refcount)) {
-		neigh_node = NULL;
-		goto unlock;
-	}
-
-	rcu_read_unlock();
+	router = orig_node_get_router(orig_node);
+	if (!router)
+		goto out;
 
 	skb = skb_clone(info->skb_packet, GFP_ATOMIC);
 	if (skb)
-		send_skb_packet(skb, neigh_node->if_incoming,
-				neigh_node->addr);
-
-	goto out;
+		send_skb_packet(skb, router->if_incoming, router->addr);
 
-unlock:
-	rcu_read_unlock();
 out:
-	if (neigh_node)
-		neigh_node_free_ref(neigh_node);
+	if (router)
+		neigh_node_free_ref(router);
 	if (orig_node)
 		orig_node_free_ref(orig_node);
-	return;
 }
 
 /* only send one vis packet. called from send_vis_packets() */