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

net/batman-adv/aggregation.c

@@ -35,7 +35,7 @@ static bool can_aggregate_with(struct batman_packet *new_batman_packet,
 			       int packet_len,
 			       unsigned long send_time,
 			       bool directlink,
-			       struct batman_if *if_incoming,
+			       struct hard_iface *if_incoming,
 			       struct forw_packet *forw_packet)
 {
 	struct batman_packet *batman_packet =
@@ -99,7 +99,7 @@ static bool can_aggregate_with(struct batman_packet *new_batman_packet,
 /* create a new aggregated packet and add this packet to it */
 static void new_aggregated_packet(unsigned char *packet_buff, int packet_len,
 				  unsigned long send_time, bool direct_link,
-				  struct batman_if *if_incoming,
+				  struct hard_iface *if_incoming,
 				  int own_packet)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
@@ -188,7 +188,7 @@ static void aggregate(struct forw_packet *forw_packet_aggr,
 
 void add_bat_packet_to_list(struct bat_priv *bat_priv,
 			    unsigned char *packet_buff, int packet_len,
-			    struct batman_if *if_incoming, char own_packet,
+			    struct hard_iface *if_incoming, char own_packet,
 			    unsigned long send_time)
 {
 	/**
@@ -247,7 +247,7 @@ void add_bat_packet_to_list(struct bat_priv *bat_priv,
 
 /* unpack the aggregated packets and process them one by one */
 void receive_aggr_bat_packet(struct ethhdr *ethhdr, unsigned char *packet_buff,
-			     int packet_len, struct batman_if *if_incoming)
+			     int packet_len, struct hard_iface *if_incoming)
 {
 	struct batman_packet *batman_packet;
 	int buff_pos = 0;

net/batman-adv/aggregation.h

@@ -35,9 +35,9 @@ static inline int aggregated_packet(int buff_pos, int packet_len, int num_hna)
 
 void add_bat_packet_to_list(struct bat_priv *bat_priv,
 			    unsigned char *packet_buff, int packet_len,
-			    struct batman_if *if_incoming, char own_packet,
+			    struct hard_iface *if_incoming, char own_packet,
 			    unsigned long send_time);
 void receive_aggr_bat_packet(struct ethhdr *ethhdr, unsigned char *packet_buff,
-			     int packet_len, struct batman_if *if_incoming);
+			     int packet_len, struct hard_iface *if_incoming);
 
 #endif /* _NET_BATMAN_ADV_AGGREGATION_H_ */

net/batman-adv/bat_sysfs.c

@@ -441,16 +441,16 @@ static ssize_t show_mesh_iface(struct kobject *kobj, struct attribute *attr,
 			       char *buff)
 {
 	struct net_device *net_dev = kobj_to_netdev(kobj);
-	struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 	ssize_t length;
 
-	if (!batman_if)
+	if (!hard_iface)
 		return 0;
 
-	length = sprintf(buff, "%s\n", batman_if->if_status == IF_NOT_IN_USE ?
-			 "none" : batman_if->soft_iface->name);
+	length = sprintf(buff, "%s\n", hard_iface->if_status == IF_NOT_IN_USE ?
+			 "none" : hard_iface->soft_iface->name);
 
-	kref_put(&batman_if->refcount, hardif_free_ref);
+	hardif_free_ref(hard_iface);
 
 	return length;
 }
@@ -459,11 +459,11 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
 				char *buff, size_t count)
 {
 	struct net_device *net_dev = kobj_to_netdev(kobj);
-	struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 	int status_tmp = -1;
-	int ret;
+	int ret = count;
 
-	if (!batman_if)
+	if (!hard_iface)
 		return count;
 
 	if (buff[count - 1] == '\n')
@@ -472,7 +472,7 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
 	if (strlen(buff) >= IFNAMSIZ) {
 		pr_err("Invalid parameter for 'mesh_iface' setting received: "
 		       "interface name too long '%s'\n", buff);
-		kref_put(&batman_if->refcount, hardif_free_ref);
+		hardif_free_ref(hard_iface);
 		return -EINVAL;
 	}
 
@@ -481,30 +481,31 @@ static ssize_t store_mesh_iface(struct kobject *kobj, struct attribute *attr,
 	else
 		status_tmp = IF_I_WANT_YOU;
 
-	if ((batman_if->if_status == status_tmp) || ((batman_if->soft_iface) &&
-	    (strncmp(batman_if->soft_iface->name, buff, IFNAMSIZ) == 0))) {
-		kref_put(&batman_if->refcount, hardif_free_ref);
-		return count;
-	}
+	if (hard_iface->if_status == status_tmp)
+		goto out;
+
+	if ((hard_iface->soft_iface) &&
+	    (strncmp(hard_iface->soft_iface->name, buff, IFNAMSIZ) == 0))
+		goto out;
 
 	if (status_tmp == IF_NOT_IN_USE) {
 		rtnl_lock();
-		hardif_disable_interface(batman_if);
+		hardif_disable_interface(hard_iface);
 		rtnl_unlock();
-		kref_put(&batman_if->refcount, hardif_free_ref);
-		return count;
+		goto out;
 	}
 
 	/* if the interface already is in use */
-	if (batman_if->if_status != IF_NOT_IN_USE) {
+	if (hard_iface->if_status != IF_NOT_IN_USE) {
 		rtnl_lock();
-		hardif_disable_interface(batman_if);
+		hardif_disable_interface(hard_iface);
 		rtnl_unlock();
 	}
 
-	ret = hardif_enable_interface(batman_if, buff);
-	kref_put(&batman_if->refcount, hardif_free_ref);
+	ret = hardif_enable_interface(hard_iface, buff);
 
+out:
+	hardif_free_ref(hard_iface);
 	return ret;
 }
 
@@ -512,13 +513,13 @@ static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
 				 char *buff)
 {
 	struct net_device *net_dev = kobj_to_netdev(kobj);
-	struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 	ssize_t length;
 
-	if (!batman_if)
+	if (!hard_iface)
 		return 0;
 
-	switch (batman_if->if_status) {
+	switch (hard_iface->if_status) {
 	case IF_TO_BE_REMOVED:
 		length = sprintf(buff, "disabling\n");
 		break;
@@ -537,7 +538,7 @@ static ssize_t show_iface_status(struct kobject *kobj, struct attribute *attr,
 		break;
 	}
 
-	kref_put(&batman_if->refcount, hardif_free_ref);
+	hardif_free_ref(hard_iface);
 
 	return length;
 }

net/batman-adv/gateway_client.c

@@ -28,58 +28,75 @@
 #include <linux/udp.h>
 #include <linux/if_vlan.h>
 
-static void gw_node_free_ref(struct kref *refcount)
+static void gw_node_free_rcu(struct rcu_head *rcu)
 {
 	struct gw_node *gw_node;
 
-	gw_node = container_of(refcount, struct gw_node, refcount);
+	gw_node = container_of(rcu, struct gw_node, rcu);
 	kfree(gw_node);
 }
 
-static void gw_node_free_rcu(struct rcu_head *rcu)
+static void gw_node_free_ref(struct gw_node *gw_node)
 {
-	struct gw_node *gw_node;
-
-	gw_node = container_of(rcu, struct gw_node, rcu);
-	kref_put(&gw_node->refcount, gw_node_free_ref);
+	if (atomic_dec_and_test(&gw_node->refcount))
+		call_rcu(&gw_node->rcu, gw_node_free_rcu);
 }
 
 void *gw_get_selected(struct bat_priv *bat_priv)
 {
-	struct gw_node *curr_gateway_tmp = bat_priv->curr_gw;
+	struct gw_node *curr_gateway_tmp;
+	struct orig_node *orig_node = NULL;
 
+	rcu_read_lock();
+	curr_gateway_tmp = rcu_dereference(bat_priv->curr_gw);
 	if (!curr_gateway_tmp)
-		return NULL;
+		goto out;
+
+	orig_node = curr_gateway_tmp->orig_node;
+	if (!orig_node)
+		goto out;
 
-	return curr_gateway_tmp->orig_node;
+	if (!atomic_inc_not_zero(&orig_node->refcount))
+		orig_node = NULL;
+
+out:
+	rcu_read_unlock();
+	return orig_node;
 }
 
 void gw_deselect(struct bat_priv *bat_priv)
 {
-	struct gw_node *gw_node = bat_priv->curr_gw;
+	struct gw_node *gw_node;
 
-	bat_priv->curr_gw = NULL;
+	spin_lock_bh(&bat_priv->gw_list_lock);
+	gw_node = rcu_dereference(bat_priv->curr_gw);
+	rcu_assign_pointer(bat_priv->curr_gw, NULL);
+	spin_unlock_bh(&bat_priv->gw_list_lock);
 
 	if (gw_node)
-		kref_put(&gw_node->refcount, gw_node_free_ref);
+		gw_node_free_ref(gw_node);
 }
 
-static struct gw_node *gw_select(struct bat_priv *bat_priv,
-			  struct gw_node *new_gw_node)
+static void gw_select(struct bat_priv *bat_priv, struct gw_node *new_gw_node)
 {
-	struct gw_node *curr_gw_node = bat_priv->curr_gw;
+	struct gw_node *curr_gw_node;
 
-	if (new_gw_node)
-		kref_get(&new_gw_node->refcount);
+	if (new_gw_node && !atomic_inc_not_zero(&new_gw_node->refcount))
+		new_gw_node = NULL;
+
+	spin_lock_bh(&bat_priv->gw_list_lock);
+	curr_gw_node = rcu_dereference(bat_priv->curr_gw);
+	rcu_assign_pointer(bat_priv->curr_gw, new_gw_node);
+	spin_unlock_bh(&bat_priv->gw_list_lock);
 
-	bat_priv->curr_gw = new_gw_node;
-	return curr_gw_node;
+	if (curr_gw_node)
+		gw_node_free_ref(curr_gw_node);
 }
 
 void gw_election(struct bat_priv *bat_priv)
 {
 	struct hlist_node *node;
-	struct gw_node *gw_node, *curr_gw_tmp = NULL, *old_gw_node = NULL;
+	struct gw_node *gw_node, *curr_gw, *curr_gw_tmp = NULL;
 	uint8_t max_tq = 0;
 	uint32_t max_gw_factor = 0, tmp_gw_factor = 0;
 	int down, up;
@@ -93,19 +110,23 @@ void gw_election(struct bat_priv *bat_priv)
 	if (atomic_read(&bat_priv->gw_mode) != GW_MODE_CLIENT)
 		return;
 
-	if (bat_priv->curr_gw)
+	rcu_read_lock();
+	curr_gw = rcu_dereference(bat_priv->curr_gw);
+	if (curr_gw) {
+		rcu_read_unlock();
 		return;
+	}
 
-	rcu_read_lock();
 	if (hlist_empty(&bat_priv->gw_list)) {
-		rcu_read_unlock();
 
-		if (bat_priv->curr_gw) {
+		if (curr_gw) {
+			rcu_read_unlock();
 			bat_dbg(DBG_BATMAN, bat_priv,
 				"Removing selected gateway - "
 				"no gateway in range\n");
 			gw_deselect(bat_priv);
-		}
+		} else
+			rcu_read_unlock();
 
 		return;
 	}
@@ -154,12 +175,12 @@ void gw_election(struct bat_priv *bat_priv)
 			max_gw_factor = tmp_gw_factor;
 	}
 
-	if (bat_priv->curr_gw != curr_gw_tmp) {
-		if ((bat_priv->curr_gw) && (!curr_gw_tmp))
+	if (curr_gw != curr_gw_tmp) {
+		if ((curr_gw) && (!curr_gw_tmp))
 			bat_dbg(DBG_BATMAN, bat_priv,
 				"Removing selected gateway - "
 				"no gateway in range\n");
-		else if ((!bat_priv->curr_gw) && (curr_gw_tmp))
+		else if ((!curr_gw) && (curr_gw_tmp))
 			bat_dbg(DBG_BATMAN, bat_priv,
 				"Adding route to gateway %pM "
 				"(gw_flags: %i, tq: %i)\n",
@@ -174,43 +195,43 @@ void gw_election(struct bat_priv *bat_priv)
 				curr_gw_tmp->orig_node->gw_flags,
 				curr_gw_tmp->orig_node->router->tq_avg);
 
-		old_gw_node = gw_select(bat_priv, curr_gw_tmp);
+		gw_select(bat_priv, curr_gw_tmp);
 	}
 
 	rcu_read_unlock();
-
-	/* the kfree() has to be outside of the rcu lock */
-	if (old_gw_node)
-		kref_put(&old_gw_node->refcount, gw_node_free_ref);
 }
 
 void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node)
 {
-	struct gw_node *curr_gateway_tmp = bat_priv->curr_gw;
+	struct gw_node *curr_gateway_tmp;
 	uint8_t gw_tq_avg, orig_tq_avg;
 
+	rcu_read_lock();
+	curr_gateway_tmp = rcu_dereference(bat_priv->curr_gw);
 	if (!curr_gateway_tmp)
-		return;
+		goto out_rcu;
 
 	if (!curr_gateway_tmp->orig_node)
-		goto deselect;
+		goto deselect_rcu;
 
 	if (!curr_gateway_tmp->orig_node->router)
-		goto deselect;
+		goto deselect_rcu;
 
 	/* this node already is the gateway */
 	if (curr_gateway_tmp->orig_node == orig_node)
-		return;
+		goto out_rcu;
 
 	if (!orig_node->router)
-		return;
+		goto out_rcu;
 
 	gw_tq_avg = curr_gateway_tmp->orig_node->router->tq_avg;
+	rcu_read_unlock();
+
 	orig_tq_avg = orig_node->router->tq_avg;
 
 	/* the TQ value has to be better */
 	if (orig_tq_avg < gw_tq_avg)
-		return;
+		goto out;
 
 	/**
 	 * if the routing class is greater than 3 the value tells us how much
@@ -218,15 +239,23 @@ void gw_check_election(struct bat_priv *bat_priv, struct orig_node *orig_node)
 	 **/
 	if ((atomic_read(&bat_priv->gw_sel_class) > 3) &&
 	    (orig_tq_avg - gw_tq_avg < atomic_read(&bat_priv->gw_sel_class)))
-		return;
+		goto out;
 
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"Restarting gateway selection: better gateway found (tq curr: "
 		"%i, tq new: %i)\n",
 		gw_tq_avg, orig_tq_avg);
+	goto deselect;
 
+out_rcu:
+	rcu_read_unlock();
+	goto out;
+deselect_rcu:
+	rcu_read_unlock();
 deselect:
 	gw_deselect(bat_priv);
+out:
+	return;
 }
 
 static void gw_node_add(struct bat_priv *bat_priv,
@@ -242,7 +271,7 @@ static void gw_node_add(struct bat_priv *bat_priv,
 	memset(gw_node, 0, sizeof(struct gw_node));
 	INIT_HLIST_NODE(&gw_node->list);
 	gw_node->orig_node = orig_node;
-	kref_init(&gw_node->refcount);
+	atomic_set(&gw_node->refcount, 1);
 
 	spin_lock_bh(&bat_priv->gw_list_lock);
 	hlist_add_head_rcu(&gw_node->list, &bat_priv->gw_list);
@@ -283,7 +312,7 @@ void gw_node_update(struct bat_priv *bat_priv,
 				"Gateway %pM removed from gateway list\n",
 				orig_node->orig);
 
-			if (gw_node == bat_priv->curr_gw) {
+			if (gw_node == rcu_dereference(bat_priv->curr_gw)) {
 				rcu_read_unlock();
 				gw_deselect(bat_priv);
 				return;
@@ -321,11 +350,11 @@ void gw_node_purge(struct bat_priv *bat_priv)
 		    atomic_read(&bat_priv->mesh_state) == MESH_ACTIVE)
 			continue;
 
-		if (bat_priv->curr_gw == gw_node)
+		if (rcu_dereference(bat_priv->curr_gw) == gw_node)
 			gw_deselect(bat_priv);
 
 		hlist_del_rcu(&gw_node->list);
-		call_rcu(&gw_node->rcu, gw_node_free_rcu);
+		gw_node_free_ref(gw_node);
 	}
 
 
@@ -335,12 +364,16 @@ void gw_node_purge(struct bat_priv *bat_priv)
 static int _write_buffer_text(struct bat_priv *bat_priv,
 			      struct seq_file *seq, struct gw_node *gw_node)
 {
-	int down, up;
+	struct gw_node *curr_gw;
+	int down, up, ret;
 
 	gw_bandwidth_to_kbit(gw_node->orig_node->gw_flags, &down, &up);
 
-	return seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %3i - %i%s/%i%s\n",
-		       (bat_priv->curr_gw == gw_node ? "=>" : "  "),
+	rcu_read_lock();
+	curr_gw = rcu_dereference(bat_priv->curr_gw);
+
+	ret = seq_printf(seq, "%s %pM (%3i) %pM [%10s]: %3i - %i%s/%i%s\n",
+		       (curr_gw == gw_node ? "=>" : "  "),
 		       gw_node->orig_node->orig,
 		       gw_node->orig_node->router->tq_avg,
 		       gw_node->orig_node->router->addr,
@@ -350,6 +383,9 @@ static int _write_buffer_text(struct bat_priv *bat_priv,
 		       (down > 2048 ? "MBit" : "KBit"),
 		       (up > 2048 ? up / 1024 : up),
 		       (up > 2048 ? "MBit" : "KBit"));
+
+	rcu_read_unlock();
+	return ret;
 }
 
 int gw_client_seq_print_text(struct seq_file *seq, void *offset)
@@ -470,8 +506,12 @@ int gw_is_target(struct bat_priv *bat_priv, struct sk_buff *skb)
 	if (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER)
 		return -1;
 
-	if (!bat_priv->curr_gw)
+	rcu_read_lock();
+	if (!rcu_dereference(bat_priv->curr_gw)) {
+		rcu_read_unlock();
 		return 0;
+	}
+	rcu_read_unlock();
 
 	return 1;
 }

net/batman-adv/hard-interface.c

@@ -31,8 +31,8 @@
 
 #include <linux/if_arp.h>
 
-/* protect update critical side of if_list - but not the content */
-static DEFINE_SPINLOCK(if_list_lock);
+/* protect update critical side of hardif_list - but not the content */
+static DEFINE_SPINLOCK(hardif_list_lock);
 
 
 static int batman_skb_recv(struct sk_buff *skb,
@@ -40,33 +40,31 @@ static int batman_skb_recv(struct sk_buff *skb,
 			   struct packet_type *ptype,
 			   struct net_device *orig_dev);
 
-static void hardif_free_rcu(struct rcu_head *rcu)
+void hardif_free_rcu(struct rcu_head *rcu)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 
-	batman_if = container_of(rcu, struct batman_if, rcu);
-	dev_put(batman_if->net_dev);
-	kref_put(&batman_if->refcount, hardif_free_ref);
+	hard_iface = container_of(rcu, struct hard_iface, rcu);
+	dev_put(hard_iface->net_dev);
+	kfree(hard_iface);
 }
 
-struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev)
+struct hard_iface *hardif_get_by_netdev(struct net_device *net_dev)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->net_dev == net_dev)
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if (hard_iface->net_dev == net_dev &&
+		    atomic_inc_not_zero(&hard_iface->refcount))
 			goto out;
 	}
 
-	batman_if = NULL;
+	hard_iface = NULL;
 
 out:
-	if (batman_if)
-		kref_get(&batman_if->refcount);
-
 	rcu_read_unlock();
-	return batman_if;
+	return hard_iface;
 }
 
 static int is_valid_iface(struct net_device *net_dev)
@@ -81,13 +79,8 @@ static int is_valid_iface(struct net_device *net_dev)
 		return 0;
 
 	/* no batman over batman */
-#ifdef HAVE_NET_DEVICE_OPS
-	if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
-		return 0;
-#else
-	if (net_dev->hard_start_xmit == interface_tx)
+	if (softif_is_valid(net_dev))
 		return 0;
-#endif
 
 	/* Device is being bridged */
 	/* if (net_dev->priv_flags & IFF_BRIDGE_PORT)
@@ -96,27 +89,25 @@ static int is_valid_iface(struct net_device *net_dev)
 	return 1;
 }
 
-static struct batman_if *get_active_batman_if(struct net_device *soft_iface)
+static struct hard_iface *hardif_get_active(struct net_device *soft_iface)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->soft_iface != soft_iface)
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if (hard_iface->soft_iface != soft_iface)
 			continue;
 
-		if (batman_if->if_status == IF_ACTIVE)
+		if (hard_iface->if_status == IF_ACTIVE &&
+		    atomic_inc_not_zero(&hard_iface->refcount))
 			goto out;
 	}
 
-	batman_if = NULL;
+	hard_iface = NULL;
 
 out:
-	if (batman_if)
-		kref_get(&batman_if->refcount);
-
 	rcu_read_unlock();
-	return batman_if;
+	return hard_iface;
 }
 
 static void update_primary_addr(struct bat_priv *bat_priv)
@@ -132,24 +123,24 @@ static void update_primary_addr(struct bat_priv *bat_priv)
 }
 
 static void set_primary_if(struct bat_priv *bat_priv,
-			   struct batman_if *batman_if)
+			   struct hard_iface *hard_iface)
 {
 	struct batman_packet *batman_packet;
-	struct batman_if *old_if;
+	struct hard_iface *old_if;
 
-	if (batman_if)
-		kref_get(&batman_if->refcount);
+	if (hard_iface && !atomic_inc_not_zero(&hard_iface->refcount))
+		hard_iface = NULL;
 
 	old_if = bat_priv->primary_if;
-	bat_priv->primary_if = batman_if;
+	bat_priv->primary_if = hard_iface;
 
 	if (old_if)
-		kref_put(&old_if->refcount, hardif_free_ref);
+		hardif_free_ref(old_if);
 
 	if (!bat_priv->primary_if)
 		return;
 
-	batman_packet = (struct batman_packet *)(batman_if->packet_buff);
+	batman_packet = (struct batman_packet *)(hard_iface->packet_buff);
 	batman_packet->flags = PRIMARIES_FIRST_HOP;
 	batman_packet->ttl = TTL;
 
@@ -162,42 +153,42 @@ static void set_primary_if(struct bat_priv *bat_priv,
 	atomic_set(&bat_priv->hna_local_changed, 1);
 }
 
-static bool hardif_is_iface_up(struct batman_if *batman_if)
+static bool hardif_is_iface_up(struct hard_iface *hard_iface)
 {
-	if (batman_if->net_dev->flags & IFF_UP)
+	if (hard_iface->net_dev->flags & IFF_UP)
 		return true;
 
 	return false;
 }
 
-static void update_mac_addresses(struct batman_if *batman_if)
+static void update_mac_addresses(struct hard_iface *hard_iface)
 {
-	memcpy(((struct batman_packet *)(batman_if->packet_buff))->orig,
-	       batman_if->net_dev->dev_addr, ETH_ALEN);
-	memcpy(((struct batman_packet *)(batman_if->packet_buff))->prev_sender,
-	       batman_if->net_dev->dev_addr, ETH_ALEN);
+	memcpy(((struct batman_packet *)(hard_iface->packet_buff))->orig,
+	       hard_iface->net_dev->dev_addr, ETH_ALEN);
+	memcpy(((struct batman_packet *)(hard_iface->packet_buff))->prev_sender,
+	       hard_iface->net_dev->dev_addr, ETH_ALEN);
 }
 
 static void check_known_mac_addr(struct net_device *net_dev)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if ((batman_if->if_status != IF_ACTIVE) &&
-		    (batman_if->if_status != IF_TO_BE_ACTIVATED))
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if ((hard_iface->if_status != IF_ACTIVE) &&
+		    (hard_iface->if_status != IF_TO_BE_ACTIVATED))
 			continue;
 
-		if (batman_if->net_dev == net_dev)
+		if (hard_iface->net_dev == net_dev)
 			continue;
 
-		if (!compare_orig(batman_if->net_dev->dev_addr,
-				  net_dev->dev_addr))
+		if (!compare_eth(hard_iface->net_dev->dev_addr,
+				 net_dev->dev_addr))
 			continue;
 
 		pr_warning("The newly added mac address (%pM) already exists "
 			   "on: %s\n", net_dev->dev_addr,
-			   batman_if->net_dev->name);
+			   hard_iface->net_dev->name);
 		pr_warning("It is strongly recommended to keep mac addresses "
 			   "unique to avoid problems!\n");
 	}
@@ -207,7 +198,7 @@ static void check_known_mac_addr(struct net_device *net_dev)
 int hardif_min_mtu(struct net_device *soft_iface)
 {
 	struct bat_priv *bat_priv = netdev_priv(soft_iface);
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 	/* allow big frames if all devices are capable to do so
 	 * (have MTU > 1500 + BAT_HEADER_LEN) */
 	int min_mtu = ETH_DATA_LEN;
@@ -216,15 +207,15 @@ int hardif_min_mtu(struct net_device *soft_iface)
 		goto out;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if ((batman_if->if_status != IF_ACTIVE) &&
-		    (batman_if->if_status != IF_TO_BE_ACTIVATED))
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if ((hard_iface->if_status != IF_ACTIVE) &&
+		    (hard_iface->if_status != IF_TO_BE_ACTIVATED))
 			continue;
 
-		if (batman_if->soft_iface != soft_iface)
+		if (hard_iface->soft_iface != soft_iface)
 			continue;
 
-		min_mtu = min_t(int, batman_if->net_dev->mtu - BAT_HEADER_LEN,
+		min_mtu = min_t(int, hard_iface->net_dev->mtu - BAT_HEADER_LEN,
 				min_mtu);
 	}
 	rcu_read_unlock();
@@ -242,77 +233,95 @@ void update_min_mtu(struct net_device *soft_iface)
 		soft_iface->mtu = min_mtu;
 }
 
-static void hardif_activate_interface(struct batman_if *batman_if)
+static void hardif_activate_interface(struct hard_iface *hard_iface)
 {
 	struct bat_priv *bat_priv;
 
-	if (batman_if->if_status != IF_INACTIVE)
+	if (hard_iface->if_status != IF_INACTIVE)
 		return;
 
-	bat_priv = netdev_priv(batman_if->soft_iface);
+	bat_priv = netdev_priv(hard_iface->soft_iface);
 
-	update_mac_addresses(batman_if);
-	batman_if->if_status = IF_TO_BE_ACTIVATED;
+	update_mac_addresses(hard_iface);
+	hard_iface->if_status = IF_TO_BE_ACTIVATED;
 
 	/**
 	 * the first active interface becomes our primary interface or
 	 * the next active interface after the old primay interface was removed
 	 */
 	if (!bat_priv->primary_if)
-		set_primary_if(bat_priv, batman_if);
+		set_primary_if(bat_priv, hard_iface);
 
-	bat_info(batman_if->soft_iface, "Interface activated: %s\n",
-		 batman_if->net_dev->name);
+	bat_info(hard_iface->soft_iface, "Interface activated: %s\n",
+		 hard_iface->net_dev->name);
 
-	update_min_mtu(batman_if->soft_iface);
+	update_min_mtu(hard_iface->soft_iface);
 	return;
 }
 
-static void hardif_deactivate_interface(struct batman_if *batman_if)
+static void hardif_deactivate_interface(struct hard_iface *hard_iface)
 {
-	if ((batman_if->if_status != IF_ACTIVE) &&
-	   (batman_if->if_status != IF_TO_BE_ACTIVATED))
+	if ((hard_iface->if_status != IF_ACTIVE) &&
+	    (hard_iface->if_status != IF_TO_BE_ACTIVATED))
 		return;
 
-	batman_if->if_status = IF_INACTIVE;
+	hard_iface->if_status = IF_INACTIVE;
 
-	bat_info(batman_if->soft_iface, "Interface deactivated: %s\n",
-		 batman_if->net_dev->name);
+	bat_info(hard_iface->soft_iface, "Interface deactivated: %s\n",
+		 hard_iface->net_dev->name);
 
-	update_min_mtu(batman_if->soft_iface);
+	update_min_mtu(hard_iface->soft_iface);
 }
 
-int hardif_enable_interface(struct batman_if *batman_if, char *iface_name)
+int hardif_enable_interface(struct hard_iface *hard_iface, char *iface_name)
 {
 	struct bat_priv *bat_priv;
 	struct batman_packet *batman_packet;
+	struct net_device *soft_iface;
+	int ret;
+
+	if (hard_iface->if_status != IF_NOT_IN_USE)
+		goto out;
 
-	if (batman_if->if_status != IF_NOT_IN_USE)
+	if (!atomic_inc_not_zero(&hard_iface->refcount))
 		goto out;
 
-	batman_if->soft_iface = dev_get_by_name(&init_net, iface_name);
+	soft_iface = dev_get_by_name(&init_net, iface_name);
 
-	if (!batman_if->soft_iface) {
-		batman_if->soft_iface = softif_create(iface_name);
+	if (!soft_iface) {
+		soft_iface = softif_create(iface_name);
 
-		if (!batman_if->soft_iface)
+		if (!soft_iface) {
+			ret = -ENOMEM;
 			goto err;
+		}
 
 		/* dev_get_by_name() increases the reference counter for us */
-		dev_hold(batman_if->soft_iface);
+		dev_hold(soft_iface);
 	}
 
-	bat_priv = netdev_priv(batman_if->soft_iface);
-	batman_if->packet_len = BAT_PACKET_LEN;
-	batman_if->packet_buff = kmalloc(batman_if->packet_len, GFP_ATOMIC);
+	if (!softif_is_valid(soft_iface)) {
+		pr_err("Can't create batman mesh interface %s: "
+		       "already exists as regular interface\n",
+		       soft_iface->name);
+		dev_put(soft_iface);
+		ret = -EINVAL;
+		goto err;
+	}
+
+	hard_iface->soft_iface = soft_iface;
+	bat_priv = netdev_priv(hard_iface->soft_iface);
+	hard_iface->packet_len = BAT_PACKET_LEN;
+	hard_iface->packet_buff = kmalloc(hard_iface->packet_len, GFP_ATOMIC);
 
-	if (!batman_if->packet_buff) {
-		bat_err(batman_if->soft_iface, "Can't add interface packet "
-			"(%s): out of memory\n", batman_if->net_dev->name);
+	if (!hard_iface->packet_buff) {
+		bat_err(hard_iface->soft_iface, "Can't add interface packet "
+			"(%s): out of memory\n", hard_iface->net_dev->name);
+		ret = -ENOMEM;
 		goto err;
 	}
 
-	batman_packet = (struct batman_packet *)(batman_if->packet_buff);
+	batman_packet = (struct batman_packet *)(hard_iface->packet_buff);
 	batman_packet->packet_type = BAT_PACKET;
 	batman_packet->version = COMPAT_VERSION;
 	batman_packet->flags = 0;
@@ -320,107 +329,107 @@ int hardif_enable_interface(struct batman_if *batman_if, char *iface_name)
 	batman_packet->tq = TQ_MAX_VALUE;
 	batman_packet->num_hna = 0;
 
-	batman_if->if_num = bat_priv->num_ifaces;
+	hard_iface->if_num = bat_priv->num_ifaces;
 	bat_priv->num_ifaces++;
-	batman_if->if_status = IF_INACTIVE;
-	orig_hash_add_if(batman_if, bat_priv->num_ifaces);
+	hard_iface->if_status = IF_INACTIVE;
+	orig_hash_add_if(hard_iface, bat_priv->num_ifaces);
 
-	batman_if->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN);
-	batman_if->batman_adv_ptype.func = batman_skb_recv;
-	batman_if->batman_adv_ptype.dev = batman_if->net_dev;
-	kref_get(&batman_if->refcount);
-	dev_add_pack(&batman_if->batman_adv_ptype);
+	hard_iface->batman_adv_ptype.type = __constant_htons(ETH_P_BATMAN);
+	hard_iface->batman_adv_ptype.func = batman_skb_recv;
+	hard_iface->batman_adv_ptype.dev = hard_iface->net_dev;
+	dev_add_pack(&hard_iface->batman_adv_ptype);
 
-	atomic_set(&batman_if->seqno, 1);
-	atomic_set(&batman_if->frag_seqno, 1);
-	bat_info(batman_if->soft_iface, "Adding interface: %s\n",
-		 batman_if->net_dev->name);
+	atomic_set(&hard_iface->seqno, 1);
+	atomic_set(&hard_iface->frag_seqno, 1);
+	bat_info(hard_iface->soft_iface, "Adding interface: %s\n",
+		 hard_iface->net_dev->name);
 
-	if (atomic_read(&bat_priv->fragmentation) && batman_if->net_dev->mtu <
+	if (atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu <
 		ETH_DATA_LEN + BAT_HEADER_LEN)
-		bat_info(batman_if->soft_iface,
+		bat_info(hard_iface->soft_iface,
 			"The MTU of interface %s is too small (%i) to handle "
 			"the transport of batman-adv packets. Packets going "
 			"over this interface will be fragmented on layer2 "
 			"which could impact the performance. Setting the MTU "
 			"to %zi would solve the problem.\n",
-			batman_if->net_dev->name, batman_if->net_dev->mtu,
+			hard_iface->net_dev->name, hard_iface->net_dev->mtu,
 			ETH_DATA_LEN + BAT_HEADER_LEN);
 
-	if (!atomic_read(&bat_priv->fragmentation) && batman_if->net_dev->mtu <
+	if (!atomic_read(&bat_priv->fragmentation) && hard_iface->net_dev->mtu <
 		ETH_DATA_LEN + BAT_HEADER_LEN)
-		bat_info(batman_if->soft_iface,
+		bat_info(hard_iface->soft_iface,
 			"The MTU of interface %s is too small (%i) to handle "
 			"the transport of batman-adv packets. If you experience"
 			" problems getting traffic through try increasing the "
 			"MTU to %zi.\n",
-			batman_if->net_dev->name, batman_if->net_dev->mtu,
+			hard_iface->net_dev->name, hard_iface->net_dev->mtu,
 			ETH_DATA_LEN + BAT_HEADER_LEN);
 
-	if (hardif_is_iface_up(batman_if))
-		hardif_activate_interface(batman_if);
+	if (hardif_is_iface_up(hard_iface))
+		hardif_activate_interface(hard_iface);
 	else
-		bat_err(batman_if->soft_iface, "Not using interface %s "
+		bat_err(hard_iface->soft_iface, "Not using interface %s "
 			"(retrying later): interface not active\n",
-			batman_if->net_dev->name);
+			hard_iface->net_dev->name);
 
 	/* begin scheduling originator messages on that interface */
-	schedule_own_packet(batman_if);
+	schedule_own_packet(hard_iface);
 
 out:
 	return 0;
 
 err:
-	return -ENOMEM;
+	hardif_free_ref(hard_iface);
+	return ret;
 }
 
-void hardif_disable_interface(struct batman_if *batman_if)
+void hardif_disable_interface(struct hard_iface *hard_iface)
 {
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 
-	if (batman_if->if_status == IF_ACTIVE)
-		hardif_deactivate_interface(batman_if);
+	if (hard_iface->if_status == IF_ACTIVE)
+		hardif_deactivate_interface(hard_iface);
 
-	if (batman_if->if_status != IF_INACTIVE)
+	if (hard_iface->if_status != IF_INACTIVE)
 		return;
 
-	bat_info(batman_if->soft_iface, "Removing interface: %s\n",
-		 batman_if->net_dev->name);
-	dev_remove_pack(&batman_if->batman_adv_ptype);
-	kref_put(&batman_if->refcount, hardif_free_ref);
+	bat_info(hard_iface->soft_iface, "Removing interface: %s\n",
+		 hard_iface->net_dev->name);
+	dev_remove_pack(&hard_iface->batman_adv_ptype);
 
 	bat_priv->num_ifaces--;
-	orig_hash_del_if(batman_if, bat_priv->num_ifaces);
+	orig_hash_del_if(hard_iface, bat_priv->num_ifaces);
 
-	if (batman_if == bat_priv->primary_if) {
-		struct batman_if *new_if;
+	if (hard_iface == bat_priv->primary_if) {
+		struct hard_iface *new_if;
 
-		new_if = get_active_batman_if(batman_if->soft_iface);
+		new_if = hardif_get_active(hard_iface->soft_iface);
 		set_primary_if(bat_priv, new_if);
 
 		if (new_if)
-			kref_put(&new_if->refcount, hardif_free_ref);
+			hardif_free_ref(new_if);
 	}
 
-	kfree(batman_if->packet_buff);
-	batman_if->packet_buff = NULL;
-	batman_if->if_status = IF_NOT_IN_USE;
+	kfree(hard_iface->packet_buff);
+	hard_iface->packet_buff = NULL;
+	hard_iface->if_status = IF_NOT_IN_USE;
 
-	/* delete all references to this batman_if */
+	/* delete all references to this hard_iface */
 	purge_orig_ref(bat_priv);
-	purge_outstanding_packets(bat_priv, batman_if);
-	dev_put(batman_if->soft_iface);
+	purge_outstanding_packets(bat_priv, hard_iface);
+	dev_put(hard_iface->soft_iface);
 
 	/* nobody uses this interface anymore */
 	if (!bat_priv->num_ifaces)
-		softif_destroy(batman_if->soft_iface);
+		softif_destroy(hard_iface->soft_iface);
 
-	batman_if->soft_iface = NULL;
+	hard_iface->soft_iface = NULL;
+	hardif_free_ref(hard_iface);
 }
 
-static struct batman_if *hardif_add_interface(struct net_device *net_dev)
+static struct hard_iface *hardif_add_interface(struct net_device *net_dev)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 	int ret;
 
 	ret = is_valid_iface(net_dev);
@@ -429,73 +438,73 @@ static struct batman_if *hardif_add_interface(struct net_device *net_dev)
 
 	dev_hold(net_dev);
 
-	batman_if = kmalloc(sizeof(struct batman_if), GFP_ATOMIC);
-	if (!batman_if) {
+	hard_iface = kmalloc(sizeof(struct hard_iface), GFP_ATOMIC);
+	if (!hard_iface) {
 		pr_err("Can't add interface (%s): out of memory\n",
 		       net_dev->name);
 		goto release_dev;
 	}
 
-	ret = sysfs_add_hardif(&batman_if->hardif_obj, net_dev);
+	ret = sysfs_add_hardif(&hard_iface->hardif_obj, net_dev);
 	if (ret)
 		goto free_if;
 
-	batman_if->if_num = -1;
-	batman_if->net_dev = net_dev;
-	batman_if->soft_iface = NULL;
-	batman_if->if_status = IF_NOT_IN_USE;
-	INIT_LIST_HEAD(&batman_if->list);
-	kref_init(&batman_if->refcount);
+	hard_iface->if_num = -1;
+	hard_iface->net_dev = net_dev;
+	hard_iface->soft_iface = NULL;
+	hard_iface->if_status = IF_NOT_IN_USE;
+	INIT_LIST_HEAD(&hard_iface->list);
+	/* extra reference for return */
+	atomic_set(&hard_iface->refcount, 2);
 
-	check_known_mac_addr(batman_if->net_dev);
+	check_known_mac_addr(hard_iface->net_dev);
 
-	spin_lock(&if_list_lock);
-	list_add_tail_rcu(&batman_if->list, &if_list);
-	spin_unlock(&if_list_lock);
+	spin_lock(&hardif_list_lock);
+	list_add_tail_rcu(&hard_iface->list, &hardif_list);
+	spin_unlock(&hardif_list_lock);
 
-	/* extra reference for return */
-	kref_get(&batman_if->refcount);
-	return batman_if;
+	return hard_iface;
 
 free_if:
-	kfree(batman_if);
+	kfree(hard_iface);
 release_dev:
 	dev_put(net_dev);
 out:
 	return NULL;
 }
 
-static void hardif_remove_interface(struct batman_if *batman_if)
+static void hardif_remove_interface(struct hard_iface *hard_iface)
 {
 	/* first deactivate interface */
-	if (batman_if->if_status != IF_NOT_IN_USE)
-		hardif_disable_interface(batman_if);
+	if (hard_iface->if_status != IF_NOT_IN_USE)
+		hardif_disable_interface(hard_iface);
 
-	if (batman_if->if_status != IF_NOT_IN_USE)
+	if (hard_iface->if_status != IF_NOT_IN_USE)
 		return;
 
-	batman_if->if_status = IF_TO_BE_REMOVED;
-	sysfs_del_hardif(&batman_if->hardif_obj);
-	call_rcu(&batman_if->rcu, hardif_free_rcu);
+	hard_iface->if_status = IF_TO_BE_REMOVED;
+	sysfs_del_hardif(&hard_iface->hardif_obj);
+	hardif_free_ref(hard_iface);
 }
 
 void hardif_remove_interfaces(void)
 {
-	struct batman_if *batman_if, *batman_if_tmp;
+	struct hard_iface *hard_iface, *hard_iface_tmp;
 	struct list_head if_queue;
 
 	INIT_LIST_HEAD(&if_queue);
 
-	spin_lock(&if_list_lock);
-	list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) {
-		list_del_rcu(&batman_if->list);
-		list_add_tail(&batman_if->list, &if_queue);
+	spin_lock(&hardif_list_lock);
+	list_for_each_entry_safe(hard_iface, hard_iface_tmp,
+				 &hardif_list, list) {
+		list_del_rcu(&hard_iface->list);
+		list_add_tail(&hard_iface->list, &if_queue);
 	}
-	spin_unlock(&if_list_lock);
+	spin_unlock(&hardif_list_lock);
 
 	rtnl_lock();
-	list_for_each_entry_safe(batman_if, batman_if_tmp, &if_queue, list) {
-		hardif_remove_interface(batman_if);
+	list_for_each_entry_safe(hard_iface, hard_iface_tmp, &if_queue, list) {
+		hardif_remove_interface(hard_iface);
 	}
 	rtnl_unlock();
 }
@@ -504,43 +513,43 @@ static int hard_if_event(struct notifier_block *this,
 			 unsigned long event, void *ptr)
 {
 	struct net_device *net_dev = (struct net_device *)ptr;
-	struct batman_if *batman_if = get_batman_if_by_netdev(net_dev);
+	struct hard_iface *hard_iface = hardif_get_by_netdev(net_dev);
 	struct bat_priv *bat_priv;
 
-	if (!batman_if && event == NETDEV_REGISTER)
-		batman_if = hardif_add_interface(net_dev);
+	if (!hard_iface && event == NETDEV_REGISTER)
+		hard_iface = hardif_add_interface(net_dev);
 
-	if (!batman_if)
+	if (!hard_iface)
 		goto out;
 
 	switch (event) {
 	case NETDEV_UP:
-		hardif_activate_interface(batman_if);
+		hardif_activate_interface(hard_iface);
 		break;
 	case NETDEV_GOING_DOWN:
 	case NETDEV_DOWN:
-		hardif_deactivate_interface(batman_if);
+		hardif_deactivate_interface(hard_iface);
 		break;
 	case NETDEV_UNREGISTER:
-		spin_lock(&if_list_lock);
-		list_del_rcu(&batman_if->list);
-		spin_unlock(&if_list_lock);
+		spin_lock(&hardif_list_lock);
+		list_del_rcu(&hard_iface->list);
+		spin_unlock(&hardif_list_lock);
 
-		hardif_remove_interface(batman_if);
+		hardif_remove_interface(hard_iface);
 		break;
 	case NETDEV_CHANGEMTU:
-		if (batman_if->soft_iface)
-			update_min_mtu(batman_if->soft_iface);
+		if (hard_iface->soft_iface)
+			update_min_mtu(hard_iface->soft_iface);
 		break;
 	case NETDEV_CHANGEADDR:
-		if (batman_if->if_status == IF_NOT_IN_USE)
+		if (hard_iface->if_status == IF_NOT_IN_USE)
 			goto hardif_put;
 
-		check_known_mac_addr(batman_if->net_dev);
-		update_mac_addresses(batman_if);
+		check_known_mac_addr(hard_iface->net_dev);
+		update_mac_addresses(hard_iface);
 
-		bat_priv = netdev_priv(batman_if->soft_iface);
-		if (batman_if == bat_priv->primary_if)
+		bat_priv = netdev_priv(hard_iface->soft_iface);
+		if (hard_iface == bat_priv->primary_if)
 			update_primary_addr(bat_priv);
 		break;
 	default:
@@ -548,7 +557,7 @@ static int hard_if_event(struct notifier_block *this,
 	};
 
 hardif_put:
-	kref_put(&batman_if->refcount, hardif_free_ref);
+	hardif_free_ref(hard_iface);
 out:
 	return NOTIFY_DONE;
 }
@@ -561,10 +570,10 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
 {
 	struct bat_priv *bat_priv;
 	struct batman_packet *batman_packet;
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 	int ret;
 
-	batman_if = container_of(ptype, struct batman_if, batman_adv_ptype);
+	hard_iface = container_of(ptype, struct hard_iface, batman_adv_ptype);
 	skb = skb_share_check(skb, GFP_ATOMIC);
 
 	/* skb was released by skb_share_check() */
@@ -580,16 +589,16 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
 				|| !skb_mac_header(skb)))
 		goto err_free;
 
-	if (!batman_if->soft_iface)
+	if (!hard_iface->soft_iface)
 		goto err_free;
 
-	bat_priv = netdev_priv(batman_if->soft_iface);
+	bat_priv = netdev_priv(hard_iface->soft_iface);
 
 	if (atomic_read(&bat_priv->mesh_state) != MESH_ACTIVE)
 		goto err_free;
 
 	/* discard frames on not active interfaces */
-	if (batman_if->if_status != IF_ACTIVE)
+	if (hard_iface->if_status != IF_ACTIVE)
 		goto err_free;
 
 	batman_packet = (struct batman_packet *)skb->data;
@@ -607,32 +616,32 @@ static int batman_skb_recv(struct sk_buff *skb, struct net_device *dev,
 	switch (batman_packet->packet_type) {
 		/* batman originator packet */
 	case BAT_PACKET:
-		ret = recv_bat_packet(skb, batman_if);
+		ret = recv_bat_packet(skb, hard_iface);
 		break;
 
 		/* batman icmp packet */
 	case BAT_ICMP:
-		ret = recv_icmp_packet(skb, batman_if);
+		ret = recv_icmp_packet(skb, hard_iface);
 		break;
 
 		/* unicast packet */
 	case BAT_UNICAST:
-		ret = recv_unicast_packet(skb, batman_if);
+		ret = recv_unicast_packet(skb, hard_iface);
 		break;
 
 		/* fragmented unicast packet */
 	case BAT_UNICAST_FRAG:
-		ret = recv_ucast_frag_packet(skb, batman_if);
+		ret = recv_ucast_frag_packet(skb, hard_iface);
 		break;
 
 		/* broadcast packet */
 	case BAT_BCAST:
-		ret = recv_bcast_packet(skb, batman_if);
+		ret = recv_bcast_packet(skb, hard_iface);
 		break;
 
 		/* vis packet */
 	case BAT_VIS:
-		ret = recv_vis_packet(skb, batman_if);
+		ret = recv_vis_packet(skb, hard_iface);
 		break;
 	default:
 		ret = NET_RX_DROP;

net/batman-adv/hard-interface.h

@@ -31,19 +31,18 @@
 
 extern struct notifier_block hard_if_notifier;
 
-struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev);
-int hardif_enable_interface(struct batman_if *batman_if, char *iface_name);
-void hardif_disable_interface(struct batman_if *batman_if);
+struct hard_iface *hardif_get_by_netdev(struct net_device *net_dev);
+int hardif_enable_interface(struct hard_iface *hard_iface, char *iface_name);
+void hardif_disable_interface(struct hard_iface *hard_iface);
 void hardif_remove_interfaces(void);
 int hardif_min_mtu(struct net_device *soft_iface);
 void update_min_mtu(struct net_device *soft_iface);
+void hardif_free_rcu(struct rcu_head *rcu);
 
-static inline void hardif_free_ref(struct kref *refcount)
+static inline void hardif_free_ref(struct hard_iface *hard_iface)
 {
-	struct batman_if *batman_if;
-
-	batman_if = container_of(refcount, struct batman_if, refcount);
-	kfree(batman_if);
+	if (atomic_dec_and_test(&hard_iface->refcount))
+		call_rcu(&hard_iface->rcu, hardif_free_rcu);
 }
 
 #endif /* _NET_BATMAN_ADV_HARD_INTERFACE_H_ */

net/batman-adv/hash.c

@@ -27,13 +27,16 @@ static void hash_init(struct hashtable_t *hash)
 {
 	int i;
 
-	for (i = 0 ; i < hash->size; i++)
+	for (i = 0 ; i < hash->size; i++) {
 		INIT_HLIST_HEAD(&hash->table[i]);
+		spin_lock_init(&hash->list_locks[i]);
+	}
 }
 
 /* free only the hashtable and the hash itself. */
 void hash_destroy(struct hashtable_t *hash)
 {
+	kfree(hash->list_locks);
 	kfree(hash->table);
 	kfree(hash);
 }
@@ -43,20 +46,25 @@ struct hashtable_t *hash_new(int size)
 {
 	struct hashtable_t *hash;
 
-	hash = kmalloc(sizeof(struct hashtable_t) , GFP_ATOMIC);
-
+	hash = kmalloc(sizeof(struct hashtable_t), GFP_ATOMIC);
 	if (!hash)
 		return NULL;
 
-	hash->size = size;
 	hash->table = kmalloc(sizeof(struct element_t *) * size, GFP_ATOMIC);
+	if (!hash->table)
+		goto free_hash;
 
-	if (!hash->table) {
-		kfree(hash);
-		return NULL;
-	}
+	hash->list_locks = kmalloc(sizeof(spinlock_t) * size, GFP_ATOMIC);
+	if (!hash->list_locks)
+		goto free_table;
 
+	hash->size = size;
 	hash_init(hash);
-
 	return hash;
+
+free_table:
+	kfree(hash->table);
+free_hash:
+	kfree(hash);
+	return NULL;
 }

net/batman-adv/hash.h

@@ -28,21 +28,17 @@
  * compare 2 element datas for their keys,
  * return 0 if same and not 0 if not
  * same */
-typedef int (*hashdata_compare_cb)(void *, void *);
+typedef int (*hashdata_compare_cb)(struct hlist_node *, void *);
 
 /* the hashfunction, should return an index
  * based on the key in the data of the first
  * argument and the size the second */
 typedef int (*hashdata_choose_cb)(void *, int);
-typedef void (*hashdata_free_cb)(void *, void *);
-
-struct element_t {
-	void *data;		/* pointer to the data */
-	struct hlist_node hlist;	/* bucket list pointer */
-};
+typedef void (*hashdata_free_cb)(struct hlist_node *, void *);
 
 struct hashtable_t {
-	struct hlist_head *table;   /* the hashtable itself, with the buckets */
+	struct hlist_head *table;   /* the hashtable itself with the buckets */
+	spinlock_t *list_locks;     /* spinlock for each hash list entry */
 	int size;		    /* size of hashtable */
 };
 
@@ -59,21 +55,22 @@ static inline void hash_delete(struct hashtable_t *hash,
 			       hashdata_free_cb free_cb, void *arg)
 {
 	struct hlist_head *head;
-	struct hlist_node *walk, *safe;
-	struct element_t *bucket;
+	struct hlist_node *node, *node_tmp;
+	spinlock_t *list_lock; /* spinlock to protect write access */
 	int i;
 
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
+		list_lock = &hash->list_locks[i];
 
-		hlist_for_each_safe(walk, safe, head) {
-			bucket = hlist_entry(walk, struct element_t, hlist);
-			if (free_cb)
-				free_cb(bucket->data, arg);
+		spin_lock_bh(list_lock);
+		hlist_for_each_safe(node, node_tmp, head) {
+			hlist_del_rcu(node);
 
-			hlist_del(walk);
-			kfree(bucket);
+			if (free_cb)
+				free_cb(node, arg);
 		}
+		spin_unlock_bh(list_lock);
 	}
 
 	hash_destroy(hash);
@@ -82,35 +79,41 @@ static inline void hash_delete(struct hashtable_t *hash,
 /* adds data to the hashtable. returns 0 on success, -1 on error */
 static inline int hash_add(struct hashtable_t *hash,
 			   hashdata_compare_cb compare,
-			   hashdata_choose_cb choose, void *data)
+			   hashdata_choose_cb choose,
+			   void *data, struct hlist_node *data_node)
 {
 	int index;
 	struct hlist_head *head;
-	struct hlist_node *walk, *safe;
-	struct element_t *bucket;
+	struct hlist_node *node;
+	spinlock_t *list_lock; /* spinlock to protect write access */
 
 	if (!hash)
-		return -1;
+		goto err;
 
 	index = choose(data, hash->size);
 	head = &hash->table[index];
+	list_lock = &hash->list_locks[index];
+
+	rcu_read_lock();
+	__hlist_for_each_rcu(node, head) {
+		if (!compare(node, data))
+			continue;
 
-	hlist_for_each_safe(walk, safe, head) {
-		bucket = hlist_entry(walk, struct element_t, hlist);
-		if (compare(bucket->data, data))
-			return -1;
+		goto err_unlock;
 	}
+	rcu_read_unlock();
 
 	/* no duplicate found in list, add new element */
-	bucket = kmalloc(sizeof(struct element_t), GFP_ATOMIC);
-
-	if (!bucket)
-		return -1;
-
-	bucket->data = data;
-	hlist_add_head(&bucket->hlist, head);
+	spin_lock_bh(list_lock);
+	hlist_add_head_rcu(data_node, head);
+	spin_unlock_bh(list_lock);
 
 	return 0;
+
+err_unlock:
+	rcu_read_unlock();
+err:
+	return -1;
 }
 
 /* removes data from hash, if found. returns pointer do data on success, so you
@@ -122,50 +125,25 @@ static inline void *hash_remove(struct hashtable_t *hash,
 				hashdata_choose_cb choose, void *data)
 {
 	size_t index;
-	struct hlist_node *walk;
-	struct element_t *bucket;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	void *data_save;
+	void *data_save = NULL;
 
 	index = choose(data, hash->size);
 	head = &hash->table[index];
 
-	hlist_for_each_entry(bucket, walk, head, hlist) {
-		if (compare(bucket->data, data)) {
-			data_save = bucket->data;
-			hlist_del(walk);
-			kfree(bucket);
-			return data_save;
-		}
-	}
-
-	return NULL;
-}
-
-/* finds data, based on the key in keydata. returns the found data on success,
- * or NULL on error */
-static inline void *hash_find(struct hashtable_t *hash,
-			      hashdata_compare_cb compare,
-			      hashdata_choose_cb choose, void *keydata)
-{
-	int index;
-	struct hlist_head *head;
-	struct hlist_node *walk;
-	struct element_t *bucket;
-
-	if (!hash)
-		return NULL;
-
-	index = choose(keydata , hash->size);
-	head = &hash->table[index];
+	spin_lock_bh(&hash->list_locks[index]);
+	hlist_for_each(node, head) {
+		if (!compare(node, data))
+			continue;
 
-	hlist_for_each(walk, head) {
-		bucket = hlist_entry(walk, struct element_t, hlist);
-		if (compare(bucket->data, keydata))
-			return bucket->data;
+		data_save = node;
+		hlist_del_rcu(node);
+		break;
 	}
+	spin_unlock_bh(&hash->list_locks[index]);
 
-	return NULL;
+	return data_save;
 }
 
 #endif /* _NET_BATMAN_ADV_HASH_H_ */

net/batman-adv/icmp_socket.c

@@ -156,10 +156,9 @@ static ssize_t bat_socket_write(struct file *file, const char __user *buff,
 	struct sk_buff *skb;
 	struct icmp_packet_rr *icmp_packet;
 
-	struct orig_node *orig_node;
-	struct batman_if *batman_if;
+	struct orig_node *orig_node = NULL;
+	struct neigh_node *neigh_node = NULL;
 	size_t packet_len = sizeof(struct icmp_packet);
-	uint8_t dstaddr[ETH_ALEN];
 
 	if (len < sizeof(struct icmp_packet)) {
 		bat_dbg(DBG_BATMAN, bat_priv,
@@ -219,47 +218,52 @@ 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;
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
-						   compare_orig, choose_orig,
-						   icmp_packet->dst));
+	rcu_read_lock();
+	orig_node = orig_hash_find(bat_priv, icmp_packet->dst);
 
 	if (!orig_node)
 		goto unlock;
 
-	if (!orig_node->router)
+	neigh_node = orig_node->router;
+
+	if (!neigh_node)
 		goto unlock;
 
-	batman_if = orig_node->router->if_incoming;
-	memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+	if (!atomic_inc_not_zero(&neigh_node->refcount)) {
+		neigh_node = NULL;
+		goto unlock;
+	}
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	rcu_read_unlock();
 
-	if (!batman_if)
+	if (!neigh_node->if_incoming)
 		goto dst_unreach;
 
-	if (batman_if->if_status != IF_ACTIVE)
+	if (neigh_node->if_incoming->if_status != IF_ACTIVE)
 		goto dst_unreach;
 
 	memcpy(icmp_packet->orig,
 	       bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
 
 	if (packet_len == sizeof(struct icmp_packet_rr))
-		memcpy(icmp_packet->rr, batman_if->net_dev->dev_addr, ETH_ALEN);
-
-
-	send_skb_packet(skb, batman_if, dstaddr);
+		memcpy(icmp_packet->rr,
+		       neigh_node->if_incoming->net_dev->dev_addr, ETH_ALEN);
 
+	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
 	goto out;
 
 unlock:
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	rcu_read_unlock();
 dst_unreach:
 	icmp_packet->msg_type = DESTINATION_UNREACHABLE;
 	bat_socket_add_packet(socket_client, icmp_packet, packet_len);
 free_skb:
 	kfree_skb(skb);
 out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		orig_node_free_ref(orig_node);
 	return len;
 }
 

net/batman-adv/main.c

@@ -33,7 +33,7 @@
 #include "vis.h"
 #include "hash.h"
 
-struct list_head if_list;
+struct list_head hardif_list;
 
 unsigned char broadcast_addr[] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
 
@@ -41,7 +41,7 @@ struct workqueue_struct *bat_event_workqueue;
 
 static int __init batman_init(void)
 {
-	INIT_LIST_HEAD(&if_list);
+	INIT_LIST_HEAD(&hardif_list);
 
 	/* the name should not be longer than 10 chars - see
 	 * http://lwn.net/Articles/23634/ */
@@ -79,7 +79,6 @@ int mesh_init(struct net_device *soft_iface)
 {
 	struct bat_priv *bat_priv = netdev_priv(soft_iface);
 
-	spin_lock_init(&bat_priv->orig_hash_lock);
 	spin_lock_init(&bat_priv->forw_bat_list_lock);
 	spin_lock_init(&bat_priv->forw_bcast_list_lock);
 	spin_lock_init(&bat_priv->hna_lhash_lock);
@@ -154,14 +153,14 @@ void dec_module_count(void)
 
 int is_my_mac(uint8_t *addr)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->if_status != IF_ACTIVE)
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if (hard_iface->if_status != IF_ACTIVE)
 			continue;
 
-		if (compare_orig(batman_if->net_dev->dev_addr, addr)) {
+		if (compare_eth(hard_iface->net_dev->dev_addr, addr)) {
 			rcu_read_unlock();
 			return 1;
 		}

net/batman-adv/main.h

@@ -122,7 +122,7 @@
 #define REVISION_VERSION_STR " "REVISION_VERSION
 #endif
 
-extern struct list_head if_list;
+extern struct list_head hardif_list;
 
 extern unsigned char broadcast_addr[];
 extern struct workqueue_struct *bat_event_workqueue;
@@ -165,4 +165,14 @@ static inline void bat_dbg(char type __always_unused,
 		pr_err("%s: " fmt, _netdev->name, ## arg);		\
 	} while (0)
 
+/**
+ * returns 1 if they are the same ethernet addr
+ *
+ * note: can't use compare_ether_addr() as it requires aligned memory
+ */
+static inline int compare_eth(void *data1, void *data2)
+{
+	return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
+}
+
 #endif /* _NET_BATMAN_ADV_MAIN_H_ */

net/batman-adv/originator.c

@@ -44,24 +44,36 @@ int originator_init(struct bat_priv *bat_priv)
 	if (bat_priv->orig_hash)
 		return 1;
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
 	bat_priv->orig_hash = hash_new(1024);
 
 	if (!bat_priv->orig_hash)
 		goto err;
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
 	start_purge_timer(bat_priv);
 	return 1;
 
 err:
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
 	return 0;
 }
 
-struct neigh_node *
-create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
-		uint8_t *neigh, struct batman_if *if_incoming)
+static void neigh_node_free_rcu(struct rcu_head *rcu)
+{
+	struct neigh_node *neigh_node;
+
+	neigh_node = container_of(rcu, struct neigh_node, rcu);
+	kfree(neigh_node);
+}
+
+void neigh_node_free_ref(struct neigh_node *neigh_node)
+{
+	if (atomic_dec_and_test(&neigh_node->refcount))
+		call_rcu(&neigh_node->rcu, neigh_node_free_rcu);
+}
+
+struct neigh_node *create_neighbor(struct orig_node *orig_node,
+				   struct orig_node *orig_neigh_node,
+				   uint8_t *neigh,
+				   struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct neigh_node *neigh_node;
@@ -73,50 +85,94 @@ create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
 	if (!neigh_node)
 		return NULL;
 
-	INIT_LIST_HEAD(&neigh_node->list);
+	INIT_HLIST_NODE(&neigh_node->list);
+	INIT_LIST_HEAD(&neigh_node->bonding_list);
 
 	memcpy(neigh_node->addr, neigh, ETH_ALEN);
 	neigh_node->orig_node = orig_neigh_node;
 	neigh_node->if_incoming = if_incoming;
 
-	list_add_tail(&neigh_node->list, &orig_node->neigh_list);
+	/* extra reference for return */
+	atomic_set(&neigh_node->refcount, 2);
+
+	spin_lock_bh(&orig_node->neigh_list_lock);
+	hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);
+	spin_unlock_bh(&orig_node->neigh_list_lock);
 	return neigh_node;
 }
 
-static void free_orig_node(void *data, void *arg)
+static void orig_node_free_rcu(struct rcu_head *rcu)
 {
-	struct list_head *list_pos, *list_pos_tmp;
-	struct neigh_node *neigh_node;
-	struct orig_node *orig_node = (struct orig_node *)data;
-	struct bat_priv *bat_priv = (struct bat_priv *)arg;
+	struct hlist_node *node, *node_tmp;
+	struct neigh_node *neigh_node, *tmp_neigh_node;
+	struct orig_node *orig_node;
 
-	/* for all neighbors towards this originator ... */
-	list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
-		neigh_node = list_entry(list_pos, struct neigh_node, list);
+	orig_node = container_of(rcu, struct orig_node, rcu);
+
+	spin_lock_bh(&orig_node->neigh_list_lock);
+
+	/* for all bonding members ... */
+	list_for_each_entry_safe(neigh_node, tmp_neigh_node,
+				 &orig_node->bond_list, bonding_list) {
+		list_del_rcu(&neigh_node->bonding_list);
+		neigh_node_free_ref(neigh_node);
+	}
 
-		list_del(list_pos);
-		kfree(neigh_node);
+	/* for all neighbors towards this originator ... */
+	hlist_for_each_entry_safe(neigh_node, node, node_tmp,
+				  &orig_node->neigh_list, list) {
+		hlist_del_rcu(&neigh_node->list);
+		neigh_node_free_ref(neigh_node);
 	}
 
+	spin_unlock_bh(&orig_node->neigh_list_lock);
+
 	frag_list_free(&orig_node->frag_list);
-	hna_global_del_orig(bat_priv, orig_node, "originator timed out");
+	hna_global_del_orig(orig_node->bat_priv, orig_node,
+			    "originator timed out");
 
 	kfree(orig_node->bcast_own);
 	kfree(orig_node->bcast_own_sum);
 	kfree(orig_node);
 }
 
+void orig_node_free_ref(struct orig_node *orig_node)
+{
+	if (atomic_dec_and_test(&orig_node->refcount))
+		call_rcu(&orig_node->rcu, orig_node_free_rcu);
+}
+
 void originator_free(struct bat_priv *bat_priv)
 {
-	if (!bat_priv->orig_hash)
+	struct hashtable_t *hash = bat_priv->orig_hash;
+	struct hlist_node *node, *node_tmp;
+	struct hlist_head *head;
+	spinlock_t *list_lock; /* spinlock to protect write access */
+	struct orig_node *orig_node;
+	int i;
+
+	if (!hash)
 		return;
 
 	cancel_delayed_work_sync(&bat_priv->orig_work);
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	hash_delete(bat_priv->orig_hash, free_orig_node, bat_priv);
 	bat_priv->orig_hash = NULL;
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+
+	for (i = 0; i < hash->size; i++) {
+		head = &hash->table[i];
+		list_lock = &hash->list_locks[i];
+
+		spin_lock_bh(list_lock);
+		hlist_for_each_entry_safe(orig_node, node, node_tmp,
+					  head, hash_entry) {
+
+			hlist_del_rcu(node);
+			orig_node_free_ref(orig_node);
+		}
+		spin_unlock_bh(list_lock);
+	}
+
+	hash_destroy(hash);
 }
 
 /* this function finds or creates an originator entry for the given
@@ -127,10 +183,7 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
 	int size;
 	int hash_added;
 
-	orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
-						   compare_orig, choose_orig,
-						   addr));
-
+	orig_node = orig_hash_find(bat_priv, addr);
 	if (orig_node)
 		return orig_node;
 
@@ -141,8 +194,16 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
 	if (!orig_node)
 		return NULL;
 
-	INIT_LIST_HEAD(&orig_node->neigh_list);
+	INIT_HLIST_HEAD(&orig_node->neigh_list);
+	INIT_LIST_HEAD(&orig_node->bond_list);
+	spin_lock_init(&orig_node->ogm_cnt_lock);
+	spin_lock_init(&orig_node->bcast_seqno_lock);
+	spin_lock_init(&orig_node->neigh_list_lock);
+
+	/* extra reference for return */
+	atomic_set(&orig_node->refcount, 2);
 
+	orig_node->bat_priv = bat_priv;
 	memcpy(orig_node->orig, addr, ETH_ALEN);
 	orig_node->router = NULL;
 	orig_node->hna_buff = NULL;
@@ -151,6 +212,8 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
 	orig_node->batman_seqno_reset = jiffies - 1
 					- msecs_to_jiffies(RESET_PROTECTION_MS);
 
+	atomic_set(&orig_node->bond_candidates, 0);
+
 	size = bat_priv->num_ifaces * sizeof(unsigned long) * NUM_WORDS;
 
 	orig_node->bcast_own = kzalloc(size, GFP_ATOMIC);
@@ -166,8 +229,8 @@ struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr)
 	if (!orig_node->bcast_own_sum)
 		goto free_bcast_own;
 
-	hash_added = hash_add(bat_priv->orig_hash, compare_orig, choose_orig,
-			      orig_node);
+	hash_added = hash_add(bat_priv->orig_hash, compare_orig,
+			      choose_orig, orig_node, &orig_node->hash_entry);
 	if (hash_added < 0)
 		goto free_bcast_own_sum;
 
@@ -185,23 +248,30 @@ static bool purge_orig_neighbors(struct bat_priv *bat_priv,
 				 struct orig_node *orig_node,
 				 struct neigh_node **best_neigh_node)
 {
-	struct list_head *list_pos, *list_pos_tmp;
+	struct hlist_node *node, *node_tmp;
 	struct neigh_node *neigh_node;
 	bool neigh_purged = false;
 
 	*best_neigh_node = NULL;
 
+	spin_lock_bh(&orig_node->neigh_list_lock);
+
 	/* for all neighbors towards this originator ... */
-	list_for_each_safe(list_pos, list_pos_tmp, &orig_node->neigh_list) {
-		neigh_node = list_entry(list_pos, struct neigh_node, list);
+	hlist_for_each_entry_safe(neigh_node, node, node_tmp,
+				  &orig_node->neigh_list, list) {
 
 		if ((time_after(jiffies,
 			neigh_node->last_valid + PURGE_TIMEOUT * HZ)) ||
 		    (neigh_node->if_incoming->if_status == IF_INACTIVE) ||
+		    (neigh_node->if_incoming->if_status == IF_NOT_IN_USE) ||
 		    (neigh_node->if_incoming->if_status == IF_TO_BE_REMOVED)) {
 
-			if (neigh_node->if_incoming->if_status ==
-							IF_TO_BE_REMOVED)
+			if ((neigh_node->if_incoming->if_status ==
+								IF_INACTIVE) ||
+			    (neigh_node->if_incoming->if_status ==
+							IF_NOT_IN_USE) ||
+			    (neigh_node->if_incoming->if_status ==
+							IF_TO_BE_REMOVED))
 				bat_dbg(DBG_BATMAN, bat_priv,
 					"neighbor purge: originator %pM, "
 					"neighbor: %pM, iface: %s\n",
@@ -215,14 +285,18 @@ static bool purge_orig_neighbors(struct bat_priv *bat_priv,
 					(neigh_node->last_valid / HZ));
 
 			neigh_purged = true;
-			list_del(list_pos);
-			kfree(neigh_node);
+
+			hlist_del_rcu(&neigh_node->list);
+			bonding_candidate_del(orig_node, neigh_node);
+			neigh_node_free_ref(neigh_node);
 		} else {
 			if ((!*best_neigh_node) ||
 			    (neigh_node->tq_avg > (*best_neigh_node)->tq_avg))
 				*best_neigh_node = neigh_node;
 		}
 	}
+
+	spin_unlock_bh(&orig_node->neigh_list_lock);
 	return neigh_purged;
 }
 
@@ -245,9 +319,6 @@ static bool purge_orig_node(struct bat_priv *bat_priv,
 				      best_neigh_node,
 				      orig_node->hna_buff,
 				      orig_node->hna_buff_len);
-			/* update bonding candidates, we could have lost
-			 * some candidates. */
-			update_bonding_candidates(orig_node);
 		}
 	}
 
@@ -257,40 +328,38 @@ static bool purge_orig_node(struct bat_priv *bat_priv,
 static void _purge_orig(struct bat_priv *bat_priv)
 {
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk, *safe;
+	struct hlist_node *node, *node_tmp;
 	struct hlist_head *head;
-	struct element_t *bucket;
+	spinlock_t *list_lock; /* spinlock to protect write access */
 	struct orig_node *orig_node;
 	int i;
 
 	if (!hash)
 		return;
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-
 	/* for all origins... */
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
+		list_lock = &hash->list_locks[i];
 
-		hlist_for_each_entry_safe(bucket, walk, safe, head, hlist) {
-			orig_node = bucket->data;
-
+		spin_lock_bh(list_lock);
+		hlist_for_each_entry_safe(orig_node, node, node_tmp,
+					  head, hash_entry) {
 			if (purge_orig_node(bat_priv, orig_node)) {
 				if (orig_node->gw_flags)
 					gw_node_delete(bat_priv, orig_node);
-				hlist_del(walk);
-				kfree(bucket);
-				free_orig_node(orig_node, bat_priv);
+				hlist_del_rcu(node);
+				orig_node_free_ref(orig_node);
+				continue;
 			}
 
 			if (time_after(jiffies, orig_node->last_frag_packet +
 						msecs_to_jiffies(FRAG_TIMEOUT)))
 				frag_list_free(&orig_node->frag_list);
 		}
+		spin_unlock_bh(list_lock);
 	}
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
-
 	gw_node_purge(bat_priv);
 	gw_election(bat_priv);
 
@@ -318,9 +387,8 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 	struct net_device *net_dev = (struct net_device *)seq->private;
 	struct bat_priv *bat_priv = netdev_priv(net_dev);
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk;
+	struct hlist_node *node, *node_tmp;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct orig_node *orig_node;
 	struct neigh_node *neigh_node;
 	int batman_count = 0;
@@ -348,14 +416,11 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 		   "Originator", "last-seen", "#", TQ_MAX_VALUE, "Nexthop",
 		   "outgoingIF", "Potential nexthops");
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			orig_node = bucket->data;
-
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
 			if (!orig_node->router)
 				continue;
 
@@ -374,8 +439,8 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 				   neigh_node->addr,
 				   neigh_node->if_incoming->net_dev->name);
 
-			list_for_each_entry(neigh_node, &orig_node->neigh_list,
-					    list) {
+			hlist_for_each_entry_rcu(neigh_node, node_tmp,
+						 &orig_node->neigh_list, list) {
 				seq_printf(seq, " %pM (%3i)", neigh_node->addr,
 						neigh_node->tq_avg);
 			}
@@ -383,10 +448,9 @@ int orig_seq_print_text(struct seq_file *seq, void *offset)
 			seq_printf(seq, "\n");
 			batman_count++;
 		}
+		rcu_read_unlock();
 	}
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
-
 	if ((batman_count == 0))
 		seq_printf(seq, "No batman nodes in range ...\n");
 
@@ -423,36 +487,36 @@ static int orig_node_add_if(struct orig_node *orig_node, int max_if_num)
 	return 0;
 }
 
-int orig_hash_add_if(struct batman_if *batman_if, int max_if_num)
+int orig_hash_add_if(struct hard_iface *hard_iface, int max_if_num)
 {
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct orig_node *orig_node;
-	int i;
+	int i, ret;
 
 	/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
 	 * if_num */
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			orig_node = bucket->data;
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+			spin_lock_bh(&orig_node->ogm_cnt_lock);
+			ret = orig_node_add_if(orig_node, max_if_num);
+			spin_unlock_bh(&orig_node->ogm_cnt_lock);
 
-			if (orig_node_add_if(orig_node, max_if_num) == -1)
+			if (ret == -1)
 				goto err;
 		}
+		rcu_read_unlock();
 	}
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
 	return 0;
 
 err:
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	rcu_read_unlock();
 	return -ENOMEM;
 }
 
@@ -508,57 +572,55 @@ static int orig_node_del_if(struct orig_node *orig_node,
 	return 0;
 }
 
-int orig_hash_del_if(struct batman_if *batman_if, int max_if_num)
+int orig_hash_del_if(struct hard_iface *hard_iface, int max_if_num)
 {
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
-	struct batman_if *batman_if_tmp;
+	struct hard_iface *hard_iface_tmp;
 	struct orig_node *orig_node;
 	int i, ret;
 
 	/* resize all orig nodes because orig_node->bcast_own(_sum) depend on
 	 * if_num */
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			orig_node = bucket->data;
-
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+			spin_lock_bh(&orig_node->ogm_cnt_lock);
 			ret = orig_node_del_if(orig_node, max_if_num,
-					batman_if->if_num);
+					hard_iface->if_num);
+			spin_unlock_bh(&orig_node->ogm_cnt_lock);
 
 			if (ret == -1)
 				goto err;
 		}
+		rcu_read_unlock();
 	}
 
 	/* renumber remaining batman interfaces _inside_ of orig_hash_lock */
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if_tmp, &if_list, list) {
-		if (batman_if_tmp->if_status == IF_NOT_IN_USE)
+	list_for_each_entry_rcu(hard_iface_tmp, &hardif_list, list) {
+		if (hard_iface_tmp->if_status == IF_NOT_IN_USE)
 			continue;
 
-		if (batman_if == batman_if_tmp)
+		if (hard_iface == hard_iface_tmp)
 			continue;
 
-		if (batman_if->soft_iface != batman_if_tmp->soft_iface)
+		if (hard_iface->soft_iface != hard_iface_tmp->soft_iface)
 			continue;
 
-		if (batman_if_tmp->if_num > batman_if->if_num)
-			batman_if_tmp->if_num--;
+		if (hard_iface_tmp->if_num > hard_iface->if_num)
+			hard_iface_tmp->if_num--;
 	}
 	rcu_read_unlock();
 
-	batman_if->if_num = -1;
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	hard_iface->if_num = -1;
 	return 0;
 
 err:
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	rcu_read_unlock();
 	return -ENOMEM;
 }

net/batman-adv/originator.h

@@ -22,21 +22,28 @@
 #ifndef _NET_BATMAN_ADV_ORIGINATOR_H_
 #define _NET_BATMAN_ADV_ORIGINATOR_H_
 
+#include "hash.h"
+
 int originator_init(struct bat_priv *bat_priv);
 void originator_free(struct bat_priv *bat_priv);
 void purge_orig_ref(struct bat_priv *bat_priv);
+void orig_node_free_ref(struct orig_node *orig_node);
 struct orig_node *get_orig_node(struct bat_priv *bat_priv, uint8_t *addr);
-struct neigh_node *
-create_neighbor(struct orig_node *orig_node, struct orig_node *orig_neigh_node,
-		uint8_t *neigh, struct batman_if *if_incoming);
+struct neigh_node *create_neighbor(struct orig_node *orig_node,
+				   struct orig_node *orig_neigh_node,
+				   uint8_t *neigh,
+				   struct hard_iface *if_incoming);
+void neigh_node_free_ref(struct neigh_node *neigh_node);
 int orig_seq_print_text(struct seq_file *seq, void *offset);
-int orig_hash_add_if(struct batman_if *batman_if, int max_if_num);
-int orig_hash_del_if(struct batman_if *batman_if, int max_if_num);
+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);
 
 
 /* returns 1 if they are the same originator */
-static inline int compare_orig(void *data1, void *data2)
+static inline int compare_orig(struct hlist_node *node, void *data2)
 {
+	void *data1 = container_of(node, struct orig_node, hash_entry);
+
 	return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
 }
 
@@ -61,4 +68,35 @@ static inline int choose_orig(void *data, int32_t size)
 	return hash % size;
 }
 
+static inline struct orig_node *orig_hash_find(struct bat_priv *bat_priv,
+					       void *data)
+{
+	struct hashtable_t *hash = bat_priv->orig_hash;
+	struct hlist_head *head;
+	struct hlist_node *node;
+	struct orig_node *orig_node, *orig_node_tmp = NULL;
+	int index;
+
+	if (!hash)
+		return NULL;
+
+	index = choose_orig(data, hash->size);
+	head = &hash->table[index];
+
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+		if (!compare_eth(orig_node, data))
+			continue;
+
+		if (!atomic_inc_not_zero(&orig_node->refcount))
+			continue;
+
+		orig_node_tmp = orig_node;
+		break;
+	}
+	rcu_read_unlock();
+
+	return orig_node_tmp;
+}
+
 #endif /* _NET_BATMAN_ADV_ORIGINATOR_H_ */

net/batman-adv/routing.c

@@ -35,35 +35,33 @@
 #include "gateway_client.h"
 #include "unicast.h"
 
-void slide_own_bcast_window(struct batman_if *batman_if)
+void slide_own_bcast_window(struct hard_iface *hard_iface)
 {
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct orig_node *orig_node;
 	unsigned long *word;
 	int i;
 	size_t word_index;
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			orig_node = bucket->data;
-			word_index = batman_if->if_num * NUM_WORDS;
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
+			spin_lock_bh(&orig_node->ogm_cnt_lock);
+			word_index = hard_iface->if_num * NUM_WORDS;
 			word = &(orig_node->bcast_own[word_index]);
 
 			bit_get_packet(bat_priv, word, 1, 0);
-			orig_node->bcast_own_sum[batman_if->if_num] =
+			orig_node->bcast_own_sum[hard_iface->if_num] =
 				bit_packet_count(word);
+			spin_unlock_bh(&orig_node->ogm_cnt_lock);
 		}
+		rcu_read_unlock();
 	}
-
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
 }
 
 static void update_HNA(struct bat_priv *bat_priv, struct orig_node *orig_node,
@@ -89,6 +87,8 @@ static void update_route(struct bat_priv *bat_priv,
 			 struct neigh_node *neigh_node,
 			 unsigned char *hna_buff, int hna_buff_len)
 {
+	struct neigh_node *neigh_node_tmp;
+
 	/* route deleted */
 	if ((orig_node->router) && (!neigh_node)) {
 
@@ -115,7 +115,12 @@ static void update_route(struct bat_priv *bat_priv,
 			orig_node->router->addr);
 	}
 
+	if (neigh_node && !atomic_inc_not_zero(&neigh_node->refcount))
+		neigh_node = NULL;
+	neigh_node_tmp = orig_node->router;
 	orig_node->router = neigh_node;
+	if (neigh_node_tmp)
+		neigh_node_free_ref(neigh_node_tmp);
 }
 
 
@@ -138,73 +143,93 @@ void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
 static int is_bidirectional_neigh(struct orig_node *orig_node,
 				struct orig_node *orig_neigh_node,
 				struct batman_packet *batman_packet,
-				struct batman_if *if_incoming)
+				struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
-	struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
+	struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
+	struct hlist_node *node;
 	unsigned char total_count;
+	uint8_t orig_eq_count, neigh_rq_count, tq_own;
+	int tq_asym_penalty, ret = 0;
 
 	if (orig_node == orig_neigh_node) {
-		list_for_each_entry(tmp_neigh_node,
-				    &orig_node->neigh_list,
-				    list) {
-
-			if (compare_orig(tmp_neigh_node->addr,
-					 orig_neigh_node->orig) &&
-			    (tmp_neigh_node->if_incoming == if_incoming))
-				neigh_node = tmp_neigh_node;
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(tmp_neigh_node, node,
+					 &orig_node->neigh_list, list) {
+
+			if (!compare_eth(tmp_neigh_node->addr,
+					 orig_neigh_node->orig))
+				continue;
+
+			if (tmp_neigh_node->if_incoming != if_incoming)
+				continue;
+
+			if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+				continue;
+
+			neigh_node = tmp_neigh_node;
 		}
+		rcu_read_unlock();
 
 		if (!neigh_node)
 			neigh_node = create_neighbor(orig_node,
 						     orig_neigh_node,
 						     orig_neigh_node->orig,
 						     if_incoming);
-		/* create_neighbor failed, return 0 */
 		if (!neigh_node)
-			return 0;
+			goto out;
 
 		neigh_node->last_valid = jiffies;
 	} else {
 		/* find packet count of corresponding one hop neighbor */
-		list_for_each_entry(tmp_neigh_node,
-				    &orig_neigh_node->neigh_list, list) {
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(tmp_neigh_node, node,
+					 &orig_neigh_node->neigh_list, list) {
+
+			if (!compare_eth(tmp_neigh_node->addr,
+					 orig_neigh_node->orig))
+				continue;
+
+			if (tmp_neigh_node->if_incoming != if_incoming)
+				continue;
 
-			if (compare_orig(tmp_neigh_node->addr,
-					 orig_neigh_node->orig) &&
-			    (tmp_neigh_node->if_incoming == if_incoming))
-				neigh_node = tmp_neigh_node;
+			if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+				continue;
+
+			neigh_node = tmp_neigh_node;
 		}
+		rcu_read_unlock();
 
 		if (!neigh_node)
 			neigh_node = create_neighbor(orig_neigh_node,
 						     orig_neigh_node,
 						     orig_neigh_node->orig,
 						     if_incoming);
-		/* create_neighbor failed, return 0 */
 		if (!neigh_node)
-			return 0;
+			goto out;
 	}
 
 	orig_node->last_valid = jiffies;
 
+	spin_lock_bh(&orig_node->ogm_cnt_lock);
+	orig_eq_count = orig_neigh_node->bcast_own_sum[if_incoming->if_num];
+	neigh_rq_count = neigh_node->real_packet_count;
+	spin_unlock_bh(&orig_node->ogm_cnt_lock);
+
 	/* pay attention to not get a value bigger than 100 % */
-	total_count = (orig_neigh_node->bcast_own_sum[if_incoming->if_num] >
-		       neigh_node->real_packet_count ?
-		       neigh_node->real_packet_count :
-		       orig_neigh_node->bcast_own_sum[if_incoming->if_num]);
+	total_count = (orig_eq_count > neigh_rq_count ?
+		       neigh_rq_count : orig_eq_count);
 
 	/* if we have too few packets (too less data) we set tq_own to zero */
 	/* if we receive too few packets it is not considered bidirectional */
 	if ((total_count < TQ_LOCAL_BIDRECT_SEND_MINIMUM) ||
-	    (neigh_node->real_packet_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
-		orig_neigh_node->tq_own = 0;
+	    (neigh_rq_count < TQ_LOCAL_BIDRECT_RECV_MINIMUM))
+		tq_own = 0;
 	else
 		/* neigh_node->real_packet_count is never zero as we
 		 * only purge old information when getting new
 		 * information */
-		orig_neigh_node->tq_own = (TQ_MAX_VALUE * total_count) /
-			neigh_node->real_packet_count;
+		tq_own = (TQ_MAX_VALUE * total_count) /	neigh_rq_count;
 
 	/*
 	 * 1 - ((1-x) ** 3), normalized to TQ_MAX_VALUE this does
@@ -212,20 +237,16 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
 	 * punishes asymmetric links more.  This will give a value
 	 * between 0 and TQ_MAX_VALUE
 	 */
-	orig_neigh_node->tq_asym_penalty =
-		TQ_MAX_VALUE -
-		(TQ_MAX_VALUE *
-		 (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
-		 (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count) *
-		 (TQ_LOCAL_WINDOW_SIZE - neigh_node->real_packet_count)) /
-		(TQ_LOCAL_WINDOW_SIZE *
-		 TQ_LOCAL_WINDOW_SIZE *
-		 TQ_LOCAL_WINDOW_SIZE);
-
-	batman_packet->tq = ((batman_packet->tq *
-			      orig_neigh_node->tq_own *
-			      orig_neigh_node->tq_asym_penalty) /
-			     (TQ_MAX_VALUE * TQ_MAX_VALUE));
+	tq_asym_penalty = TQ_MAX_VALUE - (TQ_MAX_VALUE *
+				(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
+				(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count) *
+				(TQ_LOCAL_WINDOW_SIZE - neigh_rq_count)) /
+					(TQ_LOCAL_WINDOW_SIZE *
+					 TQ_LOCAL_WINDOW_SIZE *
+					 TQ_LOCAL_WINDOW_SIZE);
+
+	batman_packet->tq = ((batman_packet->tq * tq_own * tq_asym_penalty) /
+						(TQ_MAX_VALUE * TQ_MAX_VALUE));
 
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"bidirectional: "
@@ -233,34 +254,141 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
 		"real recv = %2i, local tq: %3i, asym_penalty: %3i, "
 		"total tq: %3i\n",
 		orig_node->orig, orig_neigh_node->orig, total_count,
-		neigh_node->real_packet_count, orig_neigh_node->tq_own,
-		orig_neigh_node->tq_asym_penalty, batman_packet->tq);
+		neigh_rq_count, tq_own,	tq_asym_penalty, batman_packet->tq);
 
 	/* if link has the minimum required transmission quality
 	 * consider it bidirectional */
 	if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
-		return 1;
+		ret = 1;
 
-	return 0;
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	return ret;
+}
+
+/* caller must hold the neigh_list_lock */
+void bonding_candidate_del(struct orig_node *orig_node,
+			   struct neigh_node *neigh_node)
+{
+	/* this neighbor is not part of our candidate list */
+	if (list_empty(&neigh_node->bonding_list))
+		goto out;
+
+	list_del_rcu(&neigh_node->bonding_list);
+	INIT_LIST_HEAD(&neigh_node->bonding_list);
+	neigh_node_free_ref(neigh_node);
+	atomic_dec(&orig_node->bond_candidates);
+
+out:
+	return;
+}
+
+static void bonding_candidate_add(struct orig_node *orig_node,
+				  struct neigh_node *neigh_node)
+{
+	struct hlist_node *node;
+	struct neigh_node *tmp_neigh_node;
+	uint8_t best_tq, interference_candidate = 0;
+
+	spin_lock_bh(&orig_node->neigh_list_lock);
+
+	/* only consider if it has the same primary address ...  */
+	if (!compare_eth(orig_node->orig,
+			 neigh_node->orig_node->primary_addr))
+		goto candidate_del;
+
+	if (!orig_node->router)
+		goto candidate_del;
+
+	best_tq = orig_node->router->tq_avg;
+
+	/* ... and is good enough to be considered */
+	if (neigh_node->tq_avg < best_tq - BONDING_TQ_THRESHOLD)
+		goto candidate_del;
+
+	/**
+	 * check if we have another candidate with the same mac address or
+	 * interface. If we do, we won't select this candidate because of
+	 * possible interference.
+	 */
+	hlist_for_each_entry_rcu(tmp_neigh_node, node,
+				 &orig_node->neigh_list, list) {
+
+		if (tmp_neigh_node == neigh_node)
+			continue;
+
+		/* we only care if the other candidate is even
+		* considered as candidate. */
+		if (list_empty(&tmp_neigh_node->bonding_list))
+			continue;
+
+		if ((neigh_node->if_incoming == tmp_neigh_node->if_incoming) ||
+		    (compare_eth(neigh_node->addr, tmp_neigh_node->addr))) {
+			interference_candidate = 1;
+			break;
+		}
+	}
+
+	/* don't care further if it is an interference candidate */
+	if (interference_candidate)
+		goto candidate_del;
+
+	/* this neighbor already is part of our candidate list */
+	if (!list_empty(&neigh_node->bonding_list))
+		goto out;
+
+	if (!atomic_inc_not_zero(&neigh_node->refcount))
+		goto out;
+
+	list_add_rcu(&neigh_node->bonding_list, &orig_node->bond_list);
+	atomic_inc(&orig_node->bond_candidates);
+	goto out;
+
+candidate_del:
+	bonding_candidate_del(orig_node, neigh_node);
+
+out:
+	spin_unlock_bh(&orig_node->neigh_list_lock);
+	return;
+}
+
+/* copy primary address for bonding */
+static void bonding_save_primary(struct orig_node *orig_node,
+				 struct orig_node *orig_neigh_node,
+				 struct batman_packet *batman_packet)
+{
+	if (!(batman_packet->flags & PRIMARIES_FIRST_HOP))
+		return;
+
+	memcpy(orig_neigh_node->primary_addr, orig_node->orig, ETH_ALEN);
 }
 
 static void update_orig(struct bat_priv *bat_priv,
 			struct orig_node *orig_node,
 			struct ethhdr *ethhdr,
 			struct batman_packet *batman_packet,
-			struct batman_if *if_incoming,
+			struct hard_iface *if_incoming,
 			unsigned char *hna_buff, int hna_buff_len,
 			char is_duplicate)
 {
 	struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
+	struct orig_node *orig_node_tmp;
+	struct hlist_node *node;
 	int tmp_hna_buff_len;
+	uint8_t bcast_own_sum_orig, bcast_own_sum_neigh;
 
 	bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): "
 		"Searching and updating originator entry of received packet\n");
 
-	list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
-		if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
-		    (tmp_neigh_node->if_incoming == if_incoming)) {
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(tmp_neigh_node, node,
+				 &orig_node->neigh_list, list) {
+		if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
+		    (tmp_neigh_node->if_incoming == if_incoming) &&
+		     atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
+			if (neigh_node)
+				neigh_node_free_ref(neigh_node);
 			neigh_node = tmp_neigh_node;
 			continue;
 		}
@@ -279,16 +407,20 @@ static void update_orig(struct bat_priv *bat_priv,
 
 		orig_tmp = get_orig_node(bat_priv, ethhdr->h_source);
 		if (!orig_tmp)
-			return;
+			goto unlock;
 
 		neigh_node = create_neighbor(orig_node, orig_tmp,
 					     ethhdr->h_source, if_incoming);
+
+		orig_node_free_ref(orig_tmp);
 		if (!neigh_node)
-			return;
+			goto unlock;
 	} else
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Updating existing last-hop neighbor of originator\n");
 
+	rcu_read_unlock();
+
 	orig_node->flags = batman_packet->flags;
 	neigh_node->last_valid = jiffies;
 
@@ -302,6 +434,8 @@ static void update_orig(struct bat_priv *bat_priv,
 		neigh_node->last_ttl = batman_packet->ttl;
 	}
 
+	bonding_candidate_add(orig_node, neigh_node);
+
 	tmp_hna_buff_len = (hna_buff_len > batman_packet->num_hna * ETH_ALEN ?
 			    batman_packet->num_hna * ETH_ALEN : hna_buff_len);
 
@@ -318,10 +452,22 @@ static void update_orig(struct bat_priv *bat_priv,
 	/* if the TQ is the same and the link not more symetric we
 	 * won't consider it either */
 	if ((orig_node->router) &&
-	     ((neigh_node->tq_avg == orig_node->router->tq_avg) &&
-	     (orig_node->router->orig_node->bcast_own_sum[if_incoming->if_num]
-	      >= neigh_node->orig_node->bcast_own_sum[if_incoming->if_num])))
-		goto update_hna;
+	     (neigh_node->tq_avg == orig_node->router->tq_avg)) {
+		orig_node_tmp = orig_node->router->orig_node;
+		spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
+		bcast_own_sum_orig =
+			orig_node_tmp->bcast_own_sum[if_incoming->if_num];
+		spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
+
+		orig_node_tmp = neigh_node->orig_node;
+		spin_lock_bh(&orig_node_tmp->ogm_cnt_lock);
+		bcast_own_sum_neigh =
+			orig_node_tmp->bcast_own_sum[if_incoming->if_num];
+		spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock);
+
+		if (bcast_own_sum_orig >= bcast_own_sum_neigh)
+			goto update_hna;
+	}
 
 	update_routes(bat_priv, orig_node, neigh_node,
 		      hna_buff, tmp_hna_buff_len);
@@ -342,6 +488,14 @@ static void update_orig(struct bat_priv *bat_priv,
 	    (atomic_read(&bat_priv->gw_mode) == GW_MODE_CLIENT) &&
 	    (atomic_read(&bat_priv->gw_sel_class) > 2))
 		gw_check_election(bat_priv, orig_node);
+
+	goto out;
+
+unlock:
+	rcu_read_unlock();
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
 }
 
 /* checks whether the host restarted and is in the protection time.
@@ -379,34 +533,38 @@ static int window_protected(struct bat_priv *bat_priv,
  */
 static char count_real_packets(struct ethhdr *ethhdr,
 			       struct batman_packet *batman_packet,
-			       struct batman_if *if_incoming)
+			       struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	struct orig_node *orig_node;
 	struct neigh_node *tmp_neigh_node;
+	struct hlist_node *node;
 	char is_duplicate = 0;
 	int32_t seq_diff;
 	int need_update = 0;
-	int set_mark;
+	int set_mark, ret = -1;
 
 	orig_node = get_orig_node(bat_priv, batman_packet->orig);
 	if (!orig_node)
 		return 0;
 
+	spin_lock_bh(&orig_node->ogm_cnt_lock);
 	seq_diff = batman_packet->seqno - orig_node->last_real_seqno;
 
 	/* signalize caller that the packet is to be dropped. */
 	if (window_protected(bat_priv, seq_diff,
 			     &orig_node->batman_seqno_reset))
-		return -1;
+		goto out;
 
-	list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(tmp_neigh_node, node,
+				 &orig_node->neigh_list, list) {
 
 		is_duplicate |= get_bit_status(tmp_neigh_node->real_bits,
 					       orig_node->last_real_seqno,
 					       batman_packet->seqno);
 
-		if (compare_orig(tmp_neigh_node->addr, ethhdr->h_source) &&
+		if (compare_eth(tmp_neigh_node->addr, ethhdr->h_source) &&
 		    (tmp_neigh_node->if_incoming == if_incoming))
 			set_mark = 1;
 		else
@@ -420,6 +578,7 @@ static char count_real_packets(struct ethhdr *ethhdr,
 		tmp_neigh_node->real_packet_count =
 			bit_packet_count(tmp_neigh_node->real_bits);
 	}
+	rcu_read_unlock();
 
 	if (need_update) {
 		bat_dbg(DBG_BATMAN, bat_priv,
@@ -428,121 +587,21 @@ static char count_real_packets(struct ethhdr *ethhdr,
 		orig_node->last_real_seqno = batman_packet->seqno;
 	}
 
-	return is_duplicate;
-}
-
-/* copy primary address for bonding */
-static void mark_bonding_address(struct orig_node *orig_node,
-				 struct orig_node *orig_neigh_node,
-				 struct batman_packet *batman_packet)
-
-{
-	if (batman_packet->flags & PRIMARIES_FIRST_HOP)
-		memcpy(orig_neigh_node->primary_addr,
-		       orig_node->orig, ETH_ALEN);
-
-	return;
-}
-
-/* mark possible bond.candidates in the neighbor list */
-void update_bonding_candidates(struct orig_node *orig_node)
-{
-	int candidates;
-	int interference_candidate;
-	int best_tq;
-	struct neigh_node *tmp_neigh_node, *tmp_neigh_node2;
-	struct neigh_node *first_candidate, *last_candidate;
-
-	/* update the candidates for this originator */
-	if (!orig_node->router) {
-		orig_node->bond.candidates = 0;
-		return;
-	}
-
-	best_tq = orig_node->router->tq_avg;
-
-	/* update bond.candidates */
-
-	candidates = 0;
-
-	/* mark other nodes which also received "PRIMARIES FIRST HOP" packets
-	 * as "bonding partner" */
-
-	/* first, zero the list */
-	list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
-		tmp_neigh_node->next_bond_candidate = NULL;
-	}
-
-	first_candidate = NULL;
-	last_candidate = NULL;
-	list_for_each_entry(tmp_neigh_node, &orig_node->neigh_list, list) {
-
-		/* only consider if it has the same primary address ...  */
-		if (memcmp(orig_node->orig,
-				tmp_neigh_node->orig_node->primary_addr,
-				ETH_ALEN) != 0)
-			continue;
-
-		/* ... and is good enough to be considered */
-		if (tmp_neigh_node->tq_avg < best_tq - BONDING_TQ_THRESHOLD)
-			continue;
-
-		/* check if we have another candidate with the same
-		 * mac address or interface. If we do, we won't
-		 * select this candidate because of possible interference. */
-
-		interference_candidate = 0;
-		list_for_each_entry(tmp_neigh_node2,
-				&orig_node->neigh_list, list) {
-
-			if (tmp_neigh_node2 == tmp_neigh_node)
-				continue;
-
-			/* we only care if the other candidate is even
-			 * considered as candidate. */
-			if (!tmp_neigh_node2->next_bond_candidate)
-				continue;
-
-
-			if ((tmp_neigh_node->if_incoming ==
-				tmp_neigh_node2->if_incoming)
-				|| (memcmp(tmp_neigh_node->addr,
-				tmp_neigh_node2->addr, ETH_ALEN) == 0)) {
-
-				interference_candidate = 1;
-				break;
-			}
-		}
-		/* don't care further if it is an interference candidate */
-		if (interference_candidate)
-			continue;
-
-		if (!first_candidate) {
-			first_candidate = tmp_neigh_node;
-			tmp_neigh_node->next_bond_candidate = first_candidate;
-		} else
-			tmp_neigh_node->next_bond_candidate = last_candidate;
-
-		last_candidate = tmp_neigh_node;
-
-		candidates++;
-	}
-
-	if (candidates > 0) {
-		first_candidate->next_bond_candidate = last_candidate;
-		orig_node->bond.selected = first_candidate;
-	}
+	ret = is_duplicate;
 
-	orig_node->bond.candidates = candidates;
+out:
+	spin_unlock_bh(&orig_node->ogm_cnt_lock);
+	orig_node_free_ref(orig_node);
+	return ret;
 }
 
 void receive_bat_packet(struct ethhdr *ethhdr,
-				struct batman_packet *batman_packet,
-				unsigned char *hna_buff, int hna_buff_len,
-				struct batman_if *if_incoming)
+			struct batman_packet *batman_packet,
+			unsigned char *hna_buff, int hna_buff_len,
+			struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 	struct orig_node *orig_neigh_node, *orig_node;
 	char has_directlink_flag;
 	char is_my_addr = 0, is_my_orig = 0, is_my_oldorig = 0;
@@ -570,8 +629,8 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 
 	has_directlink_flag = (batman_packet->flags & DIRECTLINK ? 1 : 0);
 
-	is_single_hop_neigh = (compare_orig(ethhdr->h_source,
-					    batman_packet->orig) ? 1 : 0);
+	is_single_hop_neigh = (compare_eth(ethhdr->h_source,
+					   batman_packet->orig) ? 1 : 0);
 
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"Received BATMAN packet via NB: %pM, IF: %s [%pM] "
@@ -584,26 +643,26 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 		has_directlink_flag);
 
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->if_status != IF_ACTIVE)
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if (hard_iface->if_status != IF_ACTIVE)
 			continue;
 
-		if (batman_if->soft_iface != if_incoming->soft_iface)
+		if (hard_iface->soft_iface != if_incoming->soft_iface)
 			continue;
 
-		if (compare_orig(ethhdr->h_source,
-				 batman_if->net_dev->dev_addr))
+		if (compare_eth(ethhdr->h_source,
+				hard_iface->net_dev->dev_addr))
 			is_my_addr = 1;
 
-		if (compare_orig(batman_packet->orig,
-				 batman_if->net_dev->dev_addr))
+		if (compare_eth(batman_packet->orig,
+				hard_iface->net_dev->dev_addr))
 			is_my_orig = 1;
 
-		if (compare_orig(batman_packet->prev_sender,
-				 batman_if->net_dev->dev_addr))
+		if (compare_eth(batman_packet->prev_sender,
+				hard_iface->net_dev->dev_addr))
 			is_my_oldorig = 1;
 
-		if (compare_orig(ethhdr->h_source, broadcast_addr))
+		if (compare_eth(ethhdr->h_source, broadcast_addr))
 			is_broadcast = 1;
 	}
 	rcu_read_unlock();
@@ -635,7 +694,6 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 		int offset;
 
 		orig_neigh_node = get_orig_node(bat_priv, ethhdr->h_source);
-
 		if (!orig_neigh_node)
 			return;
 
@@ -644,18 +702,22 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 		/* if received seqno equals last send seqno save new
 		 * seqno for bidirectional check */
 		if (has_directlink_flag &&
-		    compare_orig(if_incoming->net_dev->dev_addr,
-				 batman_packet->orig) &&
+		    compare_eth(if_incoming->net_dev->dev_addr,
+				batman_packet->orig) &&
 		    (batman_packet->seqno - if_incoming_seqno + 2 == 0)) {
 			offset = if_incoming->if_num * NUM_WORDS;
+
+			spin_lock_bh(&orig_neigh_node->ogm_cnt_lock);
 			word = &(orig_neigh_node->bcast_own[offset]);
 			bit_mark(word, 0);
 			orig_neigh_node->bcast_own_sum[if_incoming->if_num] =
 				bit_packet_count(word);
+			spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);
 		}
 
 		bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: "
 			"originator packet from myself (via neighbor)\n");
+		orig_node_free_ref(orig_neigh_node);
 		return;
 	}
 
@@ -676,27 +738,27 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: packet within seqno protection time "
 			"(sender: %pM)\n", ethhdr->h_source);
-		return;
+		goto out;
 	}
 
 	if (batman_packet->tq == 0) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: originator packet with tq equal 0\n");
-		return;
+		goto out;
 	}
 
 	/* avoid temporary routing loops */
 	if ((orig_node->router) &&
 	    (orig_node->router->orig_node->router) &&
-	    (compare_orig(orig_node->router->addr,
-			  batman_packet->prev_sender)) &&
-	    !(compare_orig(batman_packet->orig, batman_packet->prev_sender)) &&
-	    (compare_orig(orig_node->router->addr,
-			  orig_node->router->orig_node->router->addr))) {
+	    (compare_eth(orig_node->router->addr,
+			 batman_packet->prev_sender)) &&
+	    !(compare_eth(batman_packet->orig, batman_packet->prev_sender)) &&
+	    (compare_eth(orig_node->router->addr,
+			 orig_node->router->orig_node->router->addr))) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: ignoring all rebroadcast packets that "
 			"may make me loop (sender: %pM)\n", ethhdr->h_source);
-		return;
+		goto out;
 	}
 
 	/* if sender is a direct neighbor the sender mac equals
@@ -705,19 +767,21 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 			   orig_node :
 			   get_orig_node(bat_priv, ethhdr->h_source));
 	if (!orig_neigh_node)
-		return;
+		goto out;
 
 	/* drop packet if sender is not a direct neighbor and if we
 	 * don't route towards it */
 	if (!is_single_hop_neigh && (!orig_neigh_node->router)) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: OGM via unknown neighbor!\n");
-		return;
+		goto out_neigh;
 	}
 
 	is_bidirectional = is_bidirectional_neigh(orig_node, orig_neigh_node,
 						batman_packet, if_incoming);
 
+	bonding_save_primary(orig_node, orig_neigh_node, batman_packet);
+
 	/* update ranking if it is not a duplicate or has the same
 	 * seqno and similar ttl as the non-duplicate */
 	if (is_bidirectional &&
@@ -727,9 +791,6 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 		update_orig(bat_priv, orig_node, ethhdr, batman_packet,
 			    if_incoming, hna_buff, hna_buff_len, is_duplicate);
 
-	mark_bonding_address(orig_node, orig_neigh_node, batman_packet);
-	update_bonding_candidates(orig_node);
-
 	/* is single hop (direct) neighbor */
 	if (is_single_hop_neigh) {
 
@@ -739,31 +800,36 @@ void receive_bat_packet(struct ethhdr *ethhdr,
 
 		bat_dbg(DBG_BATMAN, bat_priv, "Forwarding packet: "
 			"rebroadcast neighbor packet with direct link flag\n");
-		return;
+		goto out_neigh;
 	}
 
 	/* multihop originator */
 	if (!is_bidirectional) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: not received via bidirectional link\n");
-		return;
+		goto out_neigh;
 	}
 
 	if (is_duplicate) {
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"Drop packet: duplicate packet received\n");
-		return;
+		goto out_neigh;
 	}
 
 	bat_dbg(DBG_BATMAN, bat_priv,
 		"Forwarding packet: rebroadcast originator packet\n");
 	schedule_forward_packet(orig_node, ethhdr, batman_packet,
 				0, hna_buff_len, if_incoming);
+
+out_neigh:
+	if ((orig_neigh_node) && (!is_single_hop_neigh))
+		orig_node_free_ref(orig_neigh_node);
+out:
+	orig_node_free_ref(orig_node);
 }
 
-int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
+int recv_bat_packet(struct sk_buff *skb, struct hard_iface *hard_iface)
 {
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
 	struct ethhdr *ethhdr;
 
 	/* drop packet if it has not necessary minimum size */
@@ -790,12 +856,10 @@ int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
 
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
 	receive_aggr_bat_packet(ethhdr,
 				skb->data,
 				skb_headlen(skb),
-				batman_if);
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+				hard_iface);
 
 	kfree_skb(skb);
 	return NET_RX_SUCCESS;
@@ -804,68 +868,75 @@ int recv_bat_packet(struct sk_buff *skb, struct batman_if *batman_if)
 static int recv_my_icmp_packet(struct bat_priv *bat_priv,
 			       struct sk_buff *skb, size_t icmp_len)
 {
-	struct orig_node *orig_node;
+	struct orig_node *orig_node = NULL;
+	struct neigh_node *neigh_node = NULL;
 	struct icmp_packet_rr *icmp_packet;
-	struct batman_if *batman_if;
-	int ret;
-	uint8_t dstaddr[ETH_ALEN];
+	int ret = NET_RX_DROP;
 
 	icmp_packet = (struct icmp_packet_rr *)skb->data;
 
 	/* add data to device queue */
 	if (icmp_packet->msg_type != ECHO_REQUEST) {
 		bat_socket_receive_packet(icmp_packet, icmp_len);
-		return NET_RX_DROP;
+		goto out;
 	}
 
 	if (!bat_priv->primary_if)
-		return NET_RX_DROP;
+		goto out;
 
 	/* answer echo request (ping) */
 	/* get routing information */
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
-						   compare_orig, choose_orig,
-						   icmp_packet->orig));
-	ret = NET_RX_DROP;
-
-	if ((orig_node) && (orig_node->router)) {
-
-		/* don't lock while sending the packets ... we therefore
-		 * copy the required data before sending */
-		batman_if = orig_node->router->if_incoming;
-		memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
-
-		/* create a copy of the skb, if needed, to modify it. */
-		if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-			return NET_RX_DROP;
+	rcu_read_lock();
+	orig_node = orig_hash_find(bat_priv, icmp_packet->orig);
+
+	if (!orig_node)
+		goto unlock;
 
-		icmp_packet = (struct icmp_packet_rr *)skb->data;
+	neigh_node = orig_node->router;
 
-		memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
-		memcpy(icmp_packet->orig,
-		       bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
-		icmp_packet->msg_type = ECHO_REPLY;
-		icmp_packet->ttl = TTL;
+	if (!neigh_node)
+		goto unlock;
 
-		send_skb_packet(skb, batman_if, dstaddr);
-		ret = NET_RX_SUCCESS;
+	if (!atomic_inc_not_zero(&neigh_node->refcount)) {
+		neigh_node = NULL;
+		goto unlock;
+	}
 
-	} else
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
+	rcu_read_unlock();
+
+	/* create a copy of the skb, if needed, to modify it. */
+	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+		goto out;
+
+	icmp_packet = (struct icmp_packet_rr *)skb->data;
 
+	memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+	memcpy(icmp_packet->orig,
+		bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+	icmp_packet->msg_type = ECHO_REPLY;
+	icmp_packet->ttl = TTL;
+
+	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+	ret = NET_RX_SUCCESS;
+	goto out;
+
+unlock:
+	rcu_read_unlock();
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		orig_node_free_ref(orig_node);
 	return ret;
 }
 
 static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
 				  struct sk_buff *skb)
 {
-	struct orig_node *orig_node;
+	struct orig_node *orig_node = NULL;
+	struct neigh_node *neigh_node = NULL;
 	struct icmp_packet *icmp_packet;
-	struct batman_if *batman_if;
-	int ret;
-	uint8_t dstaddr[ETH_ALEN];
+	int ret = NET_RX_DROP;
 
 	icmp_packet = (struct icmp_packet *)skb->data;
 
@@ -874,59 +945,67 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
 		pr_debug("Warning - can't forward icmp packet from %pM to "
 			 "%pM: ttl exceeded\n", icmp_packet->orig,
 			 icmp_packet->dst);
-		return NET_RX_DROP;
+		goto out;
 	}
 
 	if (!bat_priv->primary_if)
-		return NET_RX_DROP;
+		goto out;
 
 	/* get routing information */
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	orig_node = ((struct orig_node *)
-		     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-			       icmp_packet->orig));
-	ret = NET_RX_DROP;
-
-	if ((orig_node) && (orig_node->router)) {
-
-		/* don't lock while sending the packets ... we therefore
-		 * copy the required data before sending */
-		batman_if = orig_node->router->if_incoming;
-		memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
-
-		/* create a copy of the skb, if needed, to modify it. */
-		if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-			return NET_RX_DROP;
+	rcu_read_lock();
+	orig_node = orig_hash_find(bat_priv, icmp_packet->orig);
 
-		icmp_packet = (struct icmp_packet *) skb->data;
+	if (!orig_node)
+		goto unlock;
 
-		memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
-		memcpy(icmp_packet->orig,
-		       bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
-		icmp_packet->msg_type = TTL_EXCEEDED;
-		icmp_packet->ttl = TTL;
+	neigh_node = orig_node->router;
 
-		send_skb_packet(skb, batman_if, dstaddr);
-		ret = NET_RX_SUCCESS;
+	if (!neigh_node)
+		goto unlock;
 
-	} else
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
+	if (!atomic_inc_not_zero(&neigh_node->refcount)) {
+		neigh_node = NULL;
+		goto unlock;
+	}
+
+	rcu_read_unlock();
+
+	/* create a copy of the skb, if needed, to modify it. */
+	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+		goto out;
 
+	icmp_packet = (struct icmp_packet *)skb->data;
+
+	memcpy(icmp_packet->dst, icmp_packet->orig, ETH_ALEN);
+	memcpy(icmp_packet->orig,
+		bat_priv->primary_if->net_dev->dev_addr, ETH_ALEN);
+	icmp_packet->msg_type = TTL_EXCEEDED;
+	icmp_packet->ttl = TTL;
+
+	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+	ret = NET_RX_SUCCESS;
+	goto out;
+
+unlock:
+	rcu_read_unlock();
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		orig_node_free_ref(orig_node);
 	return ret;
 }
 
 
-int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
 	struct icmp_packet_rr *icmp_packet;
 	struct ethhdr *ethhdr;
-	struct orig_node *orig_node;
-	struct batman_if *batman_if;
+	struct orig_node *orig_node = NULL;
+	struct neigh_node *neigh_node = NULL;
 	int hdr_size = sizeof(struct icmp_packet);
-	int ret;
-	uint8_t dstaddr[ETH_ALEN];
+	int ret = NET_RX_DROP;
 
 	/**
 	 * we truncate all incoming icmp packets if they don't match our size
@@ -936,21 +1015,21 @@ int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
 
 	/* drop packet if it has not necessary minimum size */
 	if (unlikely(!pskb_may_pull(skb, hdr_size)))
-		return NET_RX_DROP;
+		goto out;
 
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
 	/* packet with unicast indication but broadcast recipient */
 	if (is_broadcast_ether_addr(ethhdr->h_dest))
-		return NET_RX_DROP;
+		goto out;
 
 	/* packet with broadcast sender address */
 	if (is_broadcast_ether_addr(ethhdr->h_source))
-		return NET_RX_DROP;
+		goto out;
 
 	/* not for me */
 	if (!is_my_mac(ethhdr->h_dest))
-		return NET_RX_DROP;
+		goto out;
 
 	icmp_packet = (struct icmp_packet_rr *)skb->data;
 
@@ -970,50 +1049,59 @@ int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
 	if (icmp_packet->ttl < 2)
 		return recv_icmp_ttl_exceeded(bat_priv, skb);
 
-	ret = NET_RX_DROP;
-
 	/* get routing information */
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	orig_node = ((struct orig_node *)
-		     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-			       icmp_packet->dst));
+	rcu_read_lock();
+	orig_node = orig_hash_find(bat_priv, icmp_packet->dst);
 
-	if ((orig_node) && (orig_node->router)) {
+	if (!orig_node)
+		goto unlock;
 
-		/* don't lock while sending the packets ... we therefore
-		 * copy the required data before sending */
-		batman_if = orig_node->router->if_incoming;
-		memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
+	neigh_node = orig_node->router;
 
-		/* create a copy of the skb, if needed, to modify it. */
-		if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-			return NET_RX_DROP;
+	if (!neigh_node)
+		goto unlock;
 
-		icmp_packet = (struct icmp_packet_rr *)skb->data;
+	if (!atomic_inc_not_zero(&neigh_node->refcount)) {
+		neigh_node = NULL;
+		goto unlock;
+	}
 
-		/* decrement ttl */
-		icmp_packet->ttl--;
+	rcu_read_unlock();
 
-		/* route it */
-		send_skb_packet(skb, batman_if, dstaddr);
-		ret = NET_RX_SUCCESS;
+	/* create a copy of the skb, if needed, to modify it. */
+	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
+		goto out;
 
-	} else
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
+	icmp_packet = (struct icmp_packet_rr *)skb->data;
+
+	/* decrement ttl */
+	icmp_packet->ttl--;
+
+	/* route it */
+	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+	ret = NET_RX_SUCCESS;
+	goto out;
 
+unlock:
+	rcu_read_unlock();
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		orig_node_free_ref(orig_node);
 	return ret;
 }
 
 /* find a suitable router for this originator, and use
- * bonding if possible. */
+ * bonding if possible. increases the found neighbors
+ * refcount.*/
 struct neigh_node *find_router(struct bat_priv *bat_priv,
 			       struct orig_node *orig_node,
-			       struct batman_if *recv_if)
+			       struct hard_iface *recv_if)
 {
 	struct orig_node *primary_orig_node;
 	struct orig_node *router_orig;
-	struct neigh_node *router, *first_candidate, *best_router;
+	struct neigh_node *router, *first_candidate, *tmp_neigh_node;
 	static uint8_t zero_mac[ETH_ALEN] = {0, 0, 0, 0, 0, 0};
 	int bonding_enabled;
 
@@ -1025,78 +1113,128 @@ struct neigh_node *find_router(struct bat_priv *bat_priv,
 
 	/* without bonding, the first node should
 	 * always choose the default router. */
-
 	bonding_enabled = atomic_read(&bat_priv->bonding);
 
-	if ((!recv_if) && (!bonding_enabled))
-		return orig_node->router;
-
+	rcu_read_lock();
+	/* select default router to output */
+	router = orig_node->router;
 	router_orig = orig_node->router->orig_node;
+	if (!router_orig || !atomic_inc_not_zero(&router->refcount)) {
+		rcu_read_unlock();
+		return NULL;
+	}
+
+	if ((!recv_if) && (!bonding_enabled))
+		goto return_router;
 
 	/* if we have something in the primary_addr, we can search
 	 * for a potential bonding candidate. */
-	if (memcmp(router_orig->primary_addr, zero_mac, ETH_ALEN) == 0)
-		return orig_node->router;
+	if (compare_eth(router_orig->primary_addr, zero_mac))
+		goto return_router;
 
 	/* find the orig_node which has the primary interface. might
 	 * even be the same as our router_orig in many cases */
 
-	if (memcmp(router_orig->primary_addr,
-				router_orig->orig, ETH_ALEN) == 0) {
+	if (compare_eth(router_orig->primary_addr, router_orig->orig)) {
 		primary_orig_node = router_orig;
 	} else {
-		primary_orig_node = hash_find(bat_priv->orig_hash, compare_orig,
-					       choose_orig,
-					       router_orig->primary_addr);
-
+		primary_orig_node = orig_hash_find(bat_priv,
+						   router_orig->primary_addr);
 		if (!primary_orig_node)
-			return orig_node->router;
+			goto return_router;
+
+		orig_node_free_ref(primary_orig_node);
 	}
 
 	/* with less than 2 candidates, we can't do any
 	 * bonding and prefer the original router. */
-
-	if (primary_orig_node->bond.candidates < 2)
-		return orig_node->router;
+	if (atomic_read(&primary_orig_node->bond_candidates) < 2)
+		goto return_router;
 
 
 	/* all nodes between should choose a candidate which
 	 * is is not on the interface where the packet came
 	 * in. */
-	first_candidate = primary_orig_node->bond.selected;
-	router = first_candidate;
+
+	neigh_node_free_ref(router);
+	first_candidate = NULL;
+	router = NULL;
 
 	if (bonding_enabled) {
 		/* in the bonding case, send the packets in a round
 		 * robin fashion over the remaining interfaces. */
-		do {
+
+		list_for_each_entry_rcu(tmp_neigh_node,
+				&primary_orig_node->bond_list, bonding_list) {
+			if (!first_candidate)
+				first_candidate = tmp_neigh_node;
 			/* recv_if == NULL on the first node. */
-			if (router->if_incoming != recv_if)
+			if (tmp_neigh_node->if_incoming != recv_if &&
+			    atomic_inc_not_zero(&tmp_neigh_node->refcount)) {
+				router = tmp_neigh_node;
 				break;
+			}
+		}
 
-			router = router->next_bond_candidate;
-		} while (router != first_candidate);
+		/* use the first candidate if nothing was found. */
+		if (!router && first_candidate &&
+		    atomic_inc_not_zero(&first_candidate->refcount))
+			router = first_candidate;
 
-		primary_orig_node->bond.selected = router->next_bond_candidate;
+		if (!router) {
+			rcu_read_unlock();
+			return NULL;
+		}
+
+		/* selected should point to the next element
+		 * after the current router */
+		spin_lock_bh(&primary_orig_node->neigh_list_lock);
+		/* this is a list_move(), which unfortunately
+		 * does not exist as rcu version */
+		list_del_rcu(&primary_orig_node->bond_list);
+		list_add_rcu(&primary_orig_node->bond_list,
+				&router->bonding_list);
+		spin_unlock_bh(&primary_orig_node->neigh_list_lock);
 
 	} else {
 		/* if bonding is disabled, use the best of the
 		 * remaining candidates which are not using
 		 * this interface. */
-		best_router = first_candidate;
+		list_for_each_entry_rcu(tmp_neigh_node,
+			&primary_orig_node->bond_list, bonding_list) {
+			if (!first_candidate)
+				first_candidate = tmp_neigh_node;
 
-		do {
 			/* recv_if == NULL on the first node. */
-			if ((router->if_incoming != recv_if) &&
-				(router->tq_avg > best_router->tq_avg))
-					best_router = router;
+			if (tmp_neigh_node->if_incoming == recv_if)
+				continue;
 
-			router = router->next_bond_candidate;
-		} while (router != first_candidate);
+			if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
+				continue;
 
-		router = best_router;
-	}
+			/* if we don't have a router yet
+			 * or this one is better, choose it. */
+			if ((!router) ||
+			    (tmp_neigh_node->tq_avg > router->tq_avg)) {
+				/* decrement refcount of
+				 * previously selected router */
+				if (router)
+					neigh_node_free_ref(router);
+
+				router = tmp_neigh_node;
+				atomic_inc_not_zero(&router->refcount);
+			}
+
+			neigh_node_free_ref(tmp_neigh_node);
+		}
 
+		/* use the first candidate if nothing was found. */
+		if (!router && first_candidate &&
+		    atomic_inc_not_zero(&first_candidate->refcount))
+			router = first_candidate;
+	}
+return_router:
+	rcu_read_unlock();
 	return router;
 }
 
@@ -1125,17 +1263,14 @@ static int check_unicast_packet(struct sk_buff *skb, int hdr_size)
 	return 0;
 }
 
-int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
-			 int hdr_size)
+int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
-	struct orig_node *orig_node;
-	struct neigh_node *router;
-	struct batman_if *batman_if;
-	uint8_t dstaddr[ETH_ALEN];
+	struct orig_node *orig_node = NULL;
+	struct neigh_node *neigh_node = NULL;
 	struct unicast_packet *unicast_packet;
 	struct ethhdr *ethhdr = (struct ethhdr *)skb_mac_header(skb);
-	int ret;
+	int ret = NET_RX_DROP;
 	struct sk_buff *new_skb;
 
 	unicast_packet = (struct unicast_packet *)skb->data;
@@ -1145,53 +1280,51 @@ int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
 		pr_debug("Warning - can't forward unicast packet from %pM to "
 			 "%pM: ttl exceeded\n", ethhdr->h_source,
 			 unicast_packet->dest);
-		return NET_RX_DROP;
+		goto out;
 	}
 
 	/* get routing information */
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	orig_node = ((struct orig_node *)
-		     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-			       unicast_packet->dest));
-
-	router = find_router(bat_priv, orig_node, recv_if);
+	rcu_read_lock();
+	orig_node = orig_hash_find(bat_priv, unicast_packet->dest);
 
-	if (!router) {
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
-		return NET_RX_DROP;
-	}
+	if (!orig_node)
+		goto unlock;
 
-	/* don't lock while sending the packets ... we therefore
-	 * copy the required data before sending */
+	rcu_read_unlock();
 
-	batman_if = router->if_incoming;
-	memcpy(dstaddr, router->addr, ETH_ALEN);
+	/* find_router() increases neigh_nodes refcount if found. */
+	neigh_node = find_router(bat_priv, orig_node, recv_if);
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	if (!neigh_node)
+		goto out;
 
 	/* create a copy of the skb, if needed, to modify it. */
 	if (skb_cow(skb, sizeof(struct ethhdr)) < 0)
-		return NET_RX_DROP;
+		goto out;
 
 	unicast_packet = (struct unicast_packet *)skb->data;
 
 	if (unicast_packet->packet_type == BAT_UNICAST &&
 	    atomic_read(&bat_priv->fragmentation) &&
-	    skb->len > batman_if->net_dev->mtu)
-		return frag_send_skb(skb, bat_priv, batman_if,
-				     dstaddr);
+	    skb->len > neigh_node->if_incoming->net_dev->mtu) {
+		ret = frag_send_skb(skb, bat_priv,
+				    neigh_node->if_incoming, neigh_node->addr);
+		goto out;
+	}
 
 	if (unicast_packet->packet_type == BAT_UNICAST_FRAG &&
-	    frag_can_reassemble(skb, batman_if->net_dev->mtu)) {
+	    frag_can_reassemble(skb, neigh_node->if_incoming->net_dev->mtu)) {
 
 		ret = frag_reassemble_skb(skb, bat_priv, &new_skb);
 
 		if (ret == NET_RX_DROP)
-			return NET_RX_DROP;
+			goto out;
 
 		/* packet was buffered for late merge */
-		if (!new_skb)
-			return NET_RX_SUCCESS;
+		if (!new_skb) {
+			ret = NET_RX_SUCCESS;
+			goto out;
+		}
 
 		skb = new_skb;
 		unicast_packet = (struct unicast_packet *)skb->data;
@@ -1201,12 +1334,21 @@ int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
 	unicast_packet->ttl--;
 
 	/* route it */
-	send_skb_packet(skb, batman_if, dstaddr);
+	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+	ret = NET_RX_SUCCESS;
+	goto out;
 
-	return NET_RX_SUCCESS;
+unlock:
+	rcu_read_unlock();
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		orig_node_free_ref(orig_node);
+	return ret;
 }
 
-int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct unicast_packet *unicast_packet;
 	int hdr_size = sizeof(struct unicast_packet);
@@ -1222,10 +1364,10 @@ int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if)
 		return NET_RX_SUCCESS;
 	}
 
-	return route_unicast_packet(skb, recv_if, hdr_size);
+	return route_unicast_packet(skb, recv_if);
 }
 
-int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
 	struct unicast_frag_packet *unicast_packet;
@@ -1255,89 +1397,96 @@ int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if)
 		return NET_RX_SUCCESS;
 	}
 
-	return route_unicast_packet(skb, recv_if, hdr_size);
+	return route_unicast_packet(skb, recv_if);
 }
 
 
-int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct bat_priv *bat_priv = netdev_priv(recv_if->soft_iface);
-	struct orig_node *orig_node;
+	struct orig_node *orig_node = NULL;
 	struct bcast_packet *bcast_packet;
 	struct ethhdr *ethhdr;
 	int hdr_size = sizeof(struct bcast_packet);
+	int ret = NET_RX_DROP;
 	int32_t seq_diff;
 
 	/* drop packet if it has not necessary minimum size */
 	if (unlikely(!pskb_may_pull(skb, hdr_size)))
-		return NET_RX_DROP;
+		goto out;
 
 	ethhdr = (struct ethhdr *)skb_mac_header(skb);
 
 	/* packet with broadcast indication but unicast recipient */
 	if (!is_broadcast_ether_addr(ethhdr->h_dest))
-		return NET_RX_DROP;
+		goto out;
 
 	/* packet with broadcast sender address */
 	if (is_broadcast_ether_addr(ethhdr->h_source))
-		return NET_RX_DROP;
+		goto out;
 
 	/* ignore broadcasts sent by myself */
 	if (is_my_mac(ethhdr->h_source))
-		return NET_RX_DROP;
+		goto out;
 
 	bcast_packet = (struct bcast_packet *)skb->data;
 
 	/* ignore broadcasts originated by myself */
 	if (is_my_mac(bcast_packet->orig))
-		return NET_RX_DROP;
+		goto out;
 
 	if (bcast_packet->ttl < 2)
-		return NET_RX_DROP;
+		goto out;
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	orig_node = ((struct orig_node *)
-		     hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-			       bcast_packet->orig));
+	rcu_read_lock();
+	orig_node = orig_hash_find(bat_priv, bcast_packet->orig);
 
-	if (!orig_node) {
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
-		return NET_RX_DROP;
-	}
+	if (!orig_node)
+		goto rcu_unlock;
+
+	rcu_read_unlock();
+
+	spin_lock_bh(&orig_node->bcast_seqno_lock);
 
 	/* check whether the packet is a duplicate */
-	if (get_bit_status(orig_node->bcast_bits,
-			   orig_node->last_bcast_seqno,
-			   ntohl(bcast_packet->seqno))) {
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
-		return NET_RX_DROP;
-	}
+	if (get_bit_status(orig_node->bcast_bits, orig_node->last_bcast_seqno,
+			   ntohl(bcast_packet->seqno)))
+		goto spin_unlock;
 
 	seq_diff = ntohl(bcast_packet->seqno) - orig_node->last_bcast_seqno;
 
 	/* check whether the packet is old and the host just restarted. */
 	if (window_protected(bat_priv, seq_diff,
-			     &orig_node->bcast_seqno_reset)) {
-		spin_unlock_bh(&bat_priv->orig_hash_lock);
-		return NET_RX_DROP;
-	}
+			     &orig_node->bcast_seqno_reset))
+		goto spin_unlock;
 
 	/* mark broadcast in flood history, update window position
 	 * if required. */
 	if (bit_get_packet(bat_priv, orig_node->bcast_bits, seq_diff, 1))
 		orig_node->last_bcast_seqno = ntohl(bcast_packet->seqno);
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	spin_unlock_bh(&orig_node->bcast_seqno_lock);
+
 	/* rebroadcast packet */
 	add_bcast_packet_to_list(bat_priv, skb);
 
 	/* broadcast for me */
 	interface_rx(recv_if->soft_iface, skb, recv_if, hdr_size);
+	ret = NET_RX_SUCCESS;
+	goto out;
 
-	return NET_RX_SUCCESS;
+rcu_unlock:
+	rcu_read_unlock();
+	goto out;
+spin_unlock:
+	spin_unlock_bh(&orig_node->bcast_seqno_lock);
+out:
+	if (orig_node)
+		orig_node_free_ref(orig_node);
+	return ret;
 }
 
-int recv_vis_packet(struct sk_buff *skb, struct batman_if *recv_if)
+int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if)
 {
 	struct vis_packet *vis_packet;
 	struct ethhdr *ethhdr;

net/batman-adv/routing.h

@@ -22,24 +22,25 @@
 #ifndef _NET_BATMAN_ADV_ROUTING_H_
 #define _NET_BATMAN_ADV_ROUTING_H_
 
-void slide_own_bcast_window(struct batman_if *batman_if);
+void slide_own_bcast_window(struct hard_iface *hard_iface);
 void receive_bat_packet(struct ethhdr *ethhdr,
 				struct batman_packet *batman_packet,
 				unsigned char *hna_buff, int hna_buff_len,
-				struct batman_if *if_incoming);
+				struct hard_iface *if_incoming);
 void update_routes(struct bat_priv *bat_priv, struct orig_node *orig_node,
 		   struct neigh_node *neigh_node, unsigned char *hna_buff,
 		   int hna_buff_len);
-int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
-			 int hdr_size);
-int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if);
-int recv_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if);
-int recv_ucast_frag_packet(struct sk_buff *skb, struct batman_if *recv_if);
-int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if);
-int recv_vis_packet(struct sk_buff *skb, struct batman_if *recv_if);
-int recv_bat_packet(struct sk_buff *skb, struct batman_if *recv_if);
+int route_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_icmp_packet(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_unicast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_ucast_frag_packet(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_bcast_packet(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_vis_packet(struct sk_buff *skb, struct hard_iface *recv_if);
+int recv_bat_packet(struct sk_buff *skb, struct hard_iface *recv_if);
 struct neigh_node *find_router(struct bat_priv *bat_priv,
-		struct orig_node *orig_node, struct batman_if *recv_if);
-void update_bonding_candidates(struct orig_node *orig_node);
+			       struct orig_node *orig_node,
+			       struct hard_iface *recv_if);
+void bonding_candidate_del(struct orig_node *orig_node,
+			   struct neigh_node *neigh_node);
 
 #endif /* _NET_BATMAN_ADV_ROUTING_H_ */

net/batman-adv/send.c

@@ -56,20 +56,20 @@ static unsigned long forward_send_time(void)
 /* send out an already prepared packet to the given address via the
  * specified batman interface */
 int send_skb_packet(struct sk_buff *skb,
-				struct batman_if *batman_if,
+				struct hard_iface *hard_iface,
 				uint8_t *dst_addr)
 {
 	struct ethhdr *ethhdr;
 
-	if (batman_if->if_status != IF_ACTIVE)
+	if (hard_iface->if_status != IF_ACTIVE)
 		goto send_skb_err;
 
-	if (unlikely(!batman_if->net_dev))
+	if (unlikely(!hard_iface->net_dev))
 		goto send_skb_err;
 
-	if (!(batman_if->net_dev->flags & IFF_UP)) {
+	if (!(hard_iface->net_dev->flags & IFF_UP)) {
 		pr_warning("Interface %s is not up - can't send packet via "
-			   "that interface!\n", batman_if->net_dev->name);
+			   "that interface!\n", hard_iface->net_dev->name);
 		goto send_skb_err;
 	}
 
@@ -80,7 +80,7 @@ int send_skb_packet(struct sk_buff *skb,
 	skb_reset_mac_header(skb);
 
 	ethhdr = (struct ethhdr *) skb_mac_header(skb);
-	memcpy(ethhdr->h_source, batman_if->net_dev->dev_addr, ETH_ALEN);
+	memcpy(ethhdr->h_source, hard_iface->net_dev->dev_addr, ETH_ALEN);
 	memcpy(ethhdr->h_dest, dst_addr, ETH_ALEN);
 	ethhdr->h_proto = __constant_htons(ETH_P_BATMAN);
 
@@ -88,7 +88,7 @@ int send_skb_packet(struct sk_buff *skb,
 	skb->priority = TC_PRIO_CONTROL;
 	skb->protocol = __constant_htons(ETH_P_BATMAN);
 
-	skb->dev = batman_if->net_dev;
+	skb->dev = hard_iface->net_dev;
 
 	/* dev_queue_xmit() returns a negative result on error.	 However on
 	 * congestion and traffic shaping, it drops and returns NET_XMIT_DROP
@@ -102,16 +102,16 @@ int send_skb_packet(struct sk_buff *skb,
 
 /* Send a packet to a given interface */
 static void send_packet_to_if(struct forw_packet *forw_packet,
-			      struct batman_if *batman_if)
+			      struct hard_iface *hard_iface)
 {
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	char *fwd_str;
 	uint8_t packet_num;
 	int16_t buff_pos;
 	struct batman_packet *batman_packet;
 	struct sk_buff *skb;
 
-	if (batman_if->if_status != IF_ACTIVE)
+	if (hard_iface->if_status != IF_ACTIVE)
 		return;
 
 	packet_num = 0;
@@ -126,7 +126,7 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
 		/* we might have aggregated direct link packets with an
 		 * ordinary base packet */
 		if ((forw_packet->direct_link_flags & (1 << packet_num)) &&
-		    (forw_packet->if_incoming == batman_if))
+		    (forw_packet->if_incoming == hard_iface))
 			batman_packet->flags |= DIRECTLINK;
 		else
 			batman_packet->flags &= ~DIRECTLINK;
@@ -142,7 +142,8 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
 			batman_packet->tq, batman_packet->ttl,
 			(batman_packet->flags & DIRECTLINK ?
 			 "on" : "off"),
-			batman_if->net_dev->name, batman_if->net_dev->dev_addr);
+			hard_iface->net_dev->name,
+			hard_iface->net_dev->dev_addr);
 
 		buff_pos += sizeof(struct batman_packet) +
 			(batman_packet->num_hna * ETH_ALEN);
@@ -154,13 +155,13 @@ static void send_packet_to_if(struct forw_packet *forw_packet,
 	/* create clone because function is called more than once */
 	skb = skb_clone(forw_packet->skb, GFP_ATOMIC);
 	if (skb)
-		send_skb_packet(skb, batman_if, broadcast_addr);
+		send_skb_packet(skb, hard_iface, broadcast_addr);
 }
 
 /* send a batman packet */
 static void send_packet(struct forw_packet *forw_packet)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 	struct net_device *soft_iface;
 	struct bat_priv *bat_priv;
 	struct batman_packet *batman_packet =
@@ -204,17 +205,17 @@ static void send_packet(struct forw_packet *forw_packet)
 
 	/* broadcast on every interface */
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->soft_iface != soft_iface)
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if (hard_iface->soft_iface != soft_iface)
 			continue;
 
-		send_packet_to_if(forw_packet, batman_if);
+		send_packet_to_if(forw_packet, hard_iface);
 	}
 	rcu_read_unlock();
 }
 
 static void rebuild_batman_packet(struct bat_priv *bat_priv,
-				  struct batman_if *batman_if)
+				  struct hard_iface *hard_iface)
 {
 	int new_len;
 	unsigned char *new_buff;
@@ -226,7 +227,7 @@ static void rebuild_batman_packet(struct bat_priv *bat_priv,
 
 	/* keep old buffer if kmalloc should fail */
 	if (new_buff) {
-		memcpy(new_buff, batman_if->packet_buff,
+		memcpy(new_buff, hard_iface->packet_buff,
 		       sizeof(struct batman_packet));
 		batman_packet = (struct batman_packet *)new_buff;
 
@@ -234,21 +235,21 @@ static void rebuild_batman_packet(struct bat_priv *bat_priv,
 				new_buff + sizeof(struct batman_packet),
 				new_len - sizeof(struct batman_packet));
 
-		kfree(batman_if->packet_buff);
-		batman_if->packet_buff = new_buff;
-		batman_if->packet_len = new_len;
+		kfree(hard_iface->packet_buff);
+		hard_iface->packet_buff = new_buff;
+		hard_iface->packet_len = new_len;
 	}
 }
 
-void schedule_own_packet(struct batman_if *batman_if)
+void schedule_own_packet(struct hard_iface *hard_iface)
 {
-	struct bat_priv *bat_priv = netdev_priv(batman_if->soft_iface);
+	struct bat_priv *bat_priv = netdev_priv(hard_iface->soft_iface);
 	unsigned long send_time;
 	struct batman_packet *batman_packet;
 	int vis_server;
 
-	if ((batman_if->if_status == IF_NOT_IN_USE) ||
-	    (batman_if->if_status == IF_TO_BE_REMOVED))
+	if ((hard_iface->if_status == IF_NOT_IN_USE) ||
+	    (hard_iface->if_status == IF_TO_BE_REMOVED))
 		return;
 
 	vis_server = atomic_read(&bat_priv->vis_mode);
@@ -260,51 +261,51 @@ void schedule_own_packet(struct batman_if *batman_if)
 	 * outdated packets (especially uninitialized mac addresses) in the
 	 * packet queue
 	 */
-	if (batman_if->if_status == IF_TO_BE_ACTIVATED)
-		batman_if->if_status = IF_ACTIVE;
+	if (hard_iface->if_status == IF_TO_BE_ACTIVATED)
+		hard_iface->if_status = IF_ACTIVE;
 
 	/* if local hna has changed and interface is a primary interface */
 	if ((atomic_read(&bat_priv->hna_local_changed)) &&
-	    (batman_if == bat_priv->primary_if))
-		rebuild_batman_packet(bat_priv, batman_if);
+	    (hard_iface == bat_priv->primary_if))
+		rebuild_batman_packet(bat_priv, hard_iface);
 
 	/**
 	 * NOTE: packet_buff might just have been re-allocated in
 	 * rebuild_batman_packet()
 	 */
-	batman_packet = (struct batman_packet *)batman_if->packet_buff;
+	batman_packet = (struct batman_packet *)hard_iface->packet_buff;
 
 	/* change sequence number to network order */
 	batman_packet->seqno =
-		htonl((uint32_t)atomic_read(&batman_if->seqno));
+		htonl((uint32_t)atomic_read(&hard_iface->seqno));
 
 	if (vis_server == VIS_TYPE_SERVER_SYNC)
 		batman_packet->flags |= VIS_SERVER;
 	else
 		batman_packet->flags &= ~VIS_SERVER;
 
-	if ((batman_if == bat_priv->primary_if) &&
+	if ((hard_iface == bat_priv->primary_if) &&
 	    (atomic_read(&bat_priv->gw_mode) == GW_MODE_SERVER))
 		batman_packet->gw_flags =
 				(uint8_t)atomic_read(&bat_priv->gw_bandwidth);
 	else
 		batman_packet->gw_flags = 0;
 
-	atomic_inc(&batman_if->seqno);
+	atomic_inc(&hard_iface->seqno);
 
-	slide_own_bcast_window(batman_if);
+	slide_own_bcast_window(hard_iface);
 	send_time = own_send_time(bat_priv);
 	add_bat_packet_to_list(bat_priv,
-			       batman_if->packet_buff,
-			       batman_if->packet_len,
-			       batman_if, 1, send_time);
+			       hard_iface->packet_buff,
+			       hard_iface->packet_len,
+			       hard_iface, 1, send_time);
 }
 
 void schedule_forward_packet(struct orig_node *orig_node,
 			     struct ethhdr *ethhdr,
 			     struct batman_packet *batman_packet,
 			     uint8_t directlink, int hna_buff_len,
-			     struct batman_if *if_incoming)
+			     struct hard_iface *if_incoming)
 {
 	struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
 	unsigned char in_tq, in_ttl, tq_avg = 0;
@@ -326,7 +327,7 @@ void schedule_forward_packet(struct orig_node *orig_node,
 	if ((orig_node->router) && (orig_node->router->tq_avg != 0)) {
 
 		/* rebroadcast ogm of best ranking neighbor as is */
-		if (!compare_orig(orig_node->router->addr, ethhdr->h_source)) {
+		if (!compare_eth(orig_node->router->addr, ethhdr->h_source)) {
 			batman_packet->tq = orig_node->router->tq_avg;
 
 			if (orig_node->router->last_ttl)
@@ -443,7 +444,7 @@ int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb)
 
 static void send_outstanding_bcast_packet(struct work_struct *work)
 {
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 	struct delayed_work *delayed_work =
 		container_of(work, struct delayed_work, work);
 	struct forw_packet *forw_packet =
@@ -461,14 +462,14 @@ static void send_outstanding_bcast_packet(struct work_struct *work)
 
 	/* rebroadcast packet */
 	rcu_read_lock();
-	list_for_each_entry_rcu(batman_if, &if_list, list) {
-		if (batman_if->soft_iface != soft_iface)
+	list_for_each_entry_rcu(hard_iface, &hardif_list, list) {
+		if (hard_iface->soft_iface != soft_iface)
 			continue;
 
 		/* send a copy of the saved skb */
 		skb1 = skb_clone(forw_packet->skb, GFP_ATOMIC);
 		if (skb1)
-			send_skb_packet(skb1, batman_if, broadcast_addr);
+			send_skb_packet(skb1, hard_iface, broadcast_addr);
 	}
 	rcu_read_unlock();
 
@@ -521,15 +522,15 @@ void send_outstanding_bat_packet(struct work_struct *work)
 }
 
 void purge_outstanding_packets(struct bat_priv *bat_priv,
-			       struct batman_if *batman_if)
+			       struct hard_iface *hard_iface)
 {
 	struct forw_packet *forw_packet;
 	struct hlist_node *tmp_node, *safe_tmp_node;
 
-	if (batman_if)
+	if (hard_iface)
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"purge_outstanding_packets(): %s\n",
-			batman_if->net_dev->name);
+			hard_iface->net_dev->name);
 	else
 		bat_dbg(DBG_BATMAN, bat_priv,
 			"purge_outstanding_packets()\n");
@@ -543,8 +544,8 @@ void purge_outstanding_packets(struct bat_priv *bat_priv,
 		 * if purge_outstanding_packets() was called with an argmument
 		 * we delete only packets belonging to the given interface
 		 */
-		if ((batman_if) &&
-		    (forw_packet->if_incoming != batman_if))
+		if ((hard_iface) &&
+		    (forw_packet->if_incoming != hard_iface))
 			continue;
 
 		spin_unlock_bh(&bat_priv->forw_bcast_list_lock);
@@ -567,8 +568,8 @@ void purge_outstanding_packets(struct bat_priv *bat_priv,
 		 * if purge_outstanding_packets() was called with an argmument
 		 * we delete only packets belonging to the given interface
 		 */
-		if ((batman_if) &&
-		    (forw_packet->if_incoming != batman_if))
+		if ((hard_iface) &&
+		    (forw_packet->if_incoming != hard_iface))
 			continue;
 
 		spin_unlock_bh(&bat_priv->forw_bat_list_lock);

net/batman-adv/send.h

@@ -23,17 +23,17 @@
 #define _NET_BATMAN_ADV_SEND_H_
 
 int send_skb_packet(struct sk_buff *skb,
-				struct batman_if *batman_if,
+				struct hard_iface *hard_iface,
 				uint8_t *dst_addr);
-void schedule_own_packet(struct batman_if *batman_if);
+void schedule_own_packet(struct hard_iface *hard_iface);
 void schedule_forward_packet(struct orig_node *orig_node,
 			     struct ethhdr *ethhdr,
 			     struct batman_packet *batman_packet,
 			     uint8_t directlink, int hna_buff_len,
-			     struct batman_if *if_outgoing);
+			     struct hard_iface *if_outgoing);
 int add_bcast_packet_to_list(struct bat_priv *bat_priv, struct sk_buff *skb);
 void send_outstanding_bat_packet(struct work_struct *work);
 void purge_outstanding_packets(struct bat_priv *bat_priv,
-			       struct batman_if *batman_if);
+			       struct hard_iface *hard_iface);
 
 #endif /* _NET_BATMAN_ADV_SEND_H_ */

net/batman-adv/soft-interface.c

@@ -29,14 +29,12 @@
 #include "hash.h"
 #include "gateway_common.h"
 #include "gateway_client.h"
-#include "send.h"
 #include "bat_sysfs.h"
 #include <linux/slab.h>
 #include <linux/ethtool.h>
 #include <linux/etherdevice.h>
 #include <linux/if_vlan.h>
 #include "unicast.h"
-#include "routing.h"
 
 
 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd);
@@ -78,20 +76,18 @@ int my_skb_head_push(struct sk_buff *skb, unsigned int len)
 	return 0;
 }
 
-static void softif_neigh_free_ref(struct kref *refcount)
+static void softif_neigh_free_rcu(struct rcu_head *rcu)
 {
 	struct softif_neigh *softif_neigh;
 
-	softif_neigh = container_of(refcount, struct softif_neigh, refcount);
+	softif_neigh = container_of(rcu, struct softif_neigh, rcu);
 	kfree(softif_neigh);
 }
 
-static void softif_neigh_free_rcu(struct rcu_head *rcu)
+static void softif_neigh_free_ref(struct softif_neigh *softif_neigh)
 {
-	struct softif_neigh *softif_neigh;
-
-	softif_neigh = container_of(rcu, struct softif_neigh, rcu);
-	kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
+	if (atomic_dec_and_test(&softif_neigh->refcount))
+		call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
 }
 
 void softif_neigh_purge(struct bat_priv *bat_priv)
@@ -118,11 +114,10 @@ void softif_neigh_purge(struct bat_priv *bat_priv)
 				 softif_neigh->addr, softif_neigh->vid);
 			softif_neigh_tmp = bat_priv->softif_neigh;
 			bat_priv->softif_neigh = NULL;
-			kref_put(&softif_neigh_tmp->refcount,
-				 softif_neigh_free_ref);
+			softif_neigh_free_ref(softif_neigh_tmp);
 		}
 
-		call_rcu(&softif_neigh->rcu, softif_neigh_free_rcu);
+		softif_neigh_free_ref(softif_neigh);
 	}
 
 	spin_unlock_bh(&bat_priv->softif_neigh_lock);
@@ -137,14 +132,17 @@ static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
 	rcu_read_lock();
 	hlist_for_each_entry_rcu(softif_neigh, node,
 				 &bat_priv->softif_neigh_list, list) {
-		if (memcmp(softif_neigh->addr, addr, ETH_ALEN) != 0)
+		if (!compare_eth(softif_neigh->addr, addr))
 			continue;
 
 		if (softif_neigh->vid != vid)
 			continue;
 
+		if (!atomic_inc_not_zero(&softif_neigh->refcount))
+			continue;
+
 		softif_neigh->last_seen = jiffies;
-		goto found;
+		goto out;
 	}
 
 	softif_neigh = kzalloc(sizeof(struct softif_neigh), GFP_ATOMIC);
@@ -154,15 +152,14 @@ static struct softif_neigh *softif_neigh_get(struct bat_priv *bat_priv,
 	memcpy(softif_neigh->addr, addr, ETH_ALEN);
 	softif_neigh->vid = vid;
 	softif_neigh->last_seen = jiffies;
-	kref_init(&softif_neigh->refcount);
+	/* initialize with 2 - caller decrements counter by one */
+	atomic_set(&softif_neigh->refcount, 2);
 
 	INIT_HLIST_NODE(&softif_neigh->list);
 	spin_lock_bh(&bat_priv->softif_neigh_lock);
 	hlist_add_head_rcu(&softif_neigh->list, &bat_priv->softif_neigh_list);
 	spin_unlock_bh(&bat_priv->softif_neigh_lock);
 
-found:
-	kref_get(&softif_neigh->refcount);
 out:
 	rcu_read_unlock();
 	return softif_neigh;
@@ -174,8 +171,6 @@ 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;
-	size_t buf_size, pos;
-	char *buff;
 
 	if (!bat_priv->primary_if) {
 		return seq_printf(seq, "BATMAN mesh %s disabled - "
@@ -185,33 +180,15 @@ int softif_neigh_seq_print_text(struct seq_file *seq, void *offset)
 
 	seq_printf(seq, "Softif neighbor list (%s)\n", net_dev->name);
 
-	buf_size = 1;
-	/* Estimate length for: "   xx:xx:xx:xx:xx:xx\n" */
 	rcu_read_lock();
 	hlist_for_each_entry_rcu(softif_neigh, node,
 				 &bat_priv->softif_neigh_list, list)
-		buf_size += 30;
-	rcu_read_unlock();
-
-	buff = kmalloc(buf_size, GFP_ATOMIC);
-	if (!buff)
-		return -ENOMEM;
-
-	buff[0] = '\0';
-	pos = 0;
-
-	rcu_read_lock();
-	hlist_for_each_entry_rcu(softif_neigh, node,
-				 &bat_priv->softif_neigh_list, list) {
-		pos += snprintf(buff + pos, 31, "%s %pM (vid: %d)\n",
+		seq_printf(seq, "%s %pM (vid: %d)\n",
 				bat_priv->softif_neigh == softif_neigh
 				? "=>" : "  ", softif_neigh->addr,
 				softif_neigh->vid);
-	}
 	rcu_read_unlock();
 
-	seq_printf(seq, "%s", buff);
-	kfree(buff);
 	return 0;
 }
 
@@ -266,7 +243,7 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 			 softif_neigh->addr, softif_neigh->vid);
 		softif_neigh_tmp = bat_priv->softif_neigh;
 		bat_priv->softif_neigh = softif_neigh;
-		kref_put(&softif_neigh_tmp->refcount, softif_neigh_free_ref);
+		softif_neigh_free_ref(softif_neigh_tmp);
 		/* we need to hold the additional reference */
 		goto err;
 	}
@@ -284,7 +261,7 @@ static void softif_batman_recv(struct sk_buff *skb, struct net_device *dev,
 	}
 
 out:
-	kref_put(&softif_neigh->refcount, softif_neigh_free_ref);
+	softif_neigh_free_ref(softif_neigh);
 err:
 	kfree_skb(skb);
 	return;
@@ -437,7 +414,7 @@ int interface_tx(struct sk_buff *skb, struct net_device *soft_iface)
 }
 
 void interface_rx(struct net_device *soft_iface,
-		  struct sk_buff *skb, struct batman_if *recv_if,
+		  struct sk_buff *skb, struct hard_iface *recv_if,
 		  int hdr_size)
 {
 	struct bat_priv *bat_priv = netdev_priv(soft_iface);
@@ -485,7 +462,7 @@ void interface_rx(struct net_device *soft_iface,
 
 		memcpy(unicast_packet->dest,
 		       bat_priv->softif_neigh->addr, ETH_ALEN);
-		ret = route_unicast_packet(skb, recv_if, hdr_size);
+		ret = route_unicast_packet(skb, recv_if);
 		if (ret == NET_RX_DROP)
 			goto dropped;
 
@@ -645,6 +622,19 @@ void softif_destroy(struct net_device *soft_iface)
 	unregister_netdevice(soft_iface);
 }
 
+int softif_is_valid(struct net_device *net_dev)
+{
+#ifdef HAVE_NET_DEVICE_OPS
+	if (net_dev->netdev_ops->ndo_start_xmit == interface_tx)
+		return 1;
+#else
+	if (net_dev->hard_start_xmit == interface_tx)
+		return 1;
+#endif
+
+	return 0;
+}
+
 /* ethtool */
 static int bat_get_settings(struct net_device *dev, struct ethtool_cmd *cmd)
 {

net/batman-adv/soft-interface.h

@@ -27,9 +27,10 @@ int softif_neigh_seq_print_text(struct seq_file *seq, void *offset);
 void softif_neigh_purge(struct bat_priv *bat_priv);
 int interface_tx(struct sk_buff *skb, struct net_device *soft_iface);
 void interface_rx(struct net_device *soft_iface,
-		  struct sk_buff *skb, struct batman_if *recv_if,
+		  struct sk_buff *skb, struct hard_iface *recv_if,
 		  int hdr_size);
 struct net_device *softif_create(char *name);
 void softif_destroy(struct net_device *soft_iface);
+int softif_is_valid(struct net_device *net_dev);
 
 #endif /* _NET_BATMAN_ADV_SOFT_INTERFACE_H_ */

net/batman-adv/translation-table.c

@@ -30,12 +30,85 @@ static void _hna_global_del_orig(struct bat_priv *bat_priv,
 				 struct hna_global_entry *hna_global_entry,
 				 char *message);
 
+/* returns 1 if they are the same mac addr */
+static int compare_lhna(struct hlist_node *node, void *data2)
+{
+	void *data1 = container_of(node, struct hna_local_entry, hash_entry);
+
+	return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
+}
+
+/* returns 1 if they are the same mac addr */
+static int compare_ghna(struct hlist_node *node, void *data2)
+{
+	void *data1 = container_of(node, struct hna_global_entry, hash_entry);
+
+	return (memcmp(data1, data2, ETH_ALEN) == 0 ? 1 : 0);
+}
+
 static void hna_local_start_timer(struct bat_priv *bat_priv)
 {
 	INIT_DELAYED_WORK(&bat_priv->hna_work, hna_local_purge);
 	queue_delayed_work(bat_event_workqueue, &bat_priv->hna_work, 10 * HZ);
 }
 
+static struct hna_local_entry *hna_local_hash_find(struct bat_priv *bat_priv,
+						   void *data)
+{
+	struct hashtable_t *hash = bat_priv->hna_local_hash;
+	struct hlist_head *head;
+	struct hlist_node *node;
+	struct hna_local_entry *hna_local_entry, *hna_local_entry_tmp = NULL;
+	int index;
+
+	if (!hash)
+		return NULL;
+
+	index = choose_orig(data, hash->size);
+	head = &hash->table[index];
+
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(hna_local_entry, node, head, hash_entry) {
+		if (!compare_eth(hna_local_entry, data))
+			continue;
+
+		hna_local_entry_tmp = hna_local_entry;
+		break;
+	}
+	rcu_read_unlock();
+
+	return hna_local_entry_tmp;
+}
+
+static struct hna_global_entry *hna_global_hash_find(struct bat_priv *bat_priv,
+						     void *data)
+{
+	struct hashtable_t *hash = bat_priv->hna_global_hash;
+	struct hlist_head *head;
+	struct hlist_node *node;
+	struct hna_global_entry *hna_global_entry;
+	struct hna_global_entry *hna_global_entry_tmp = NULL;
+	int index;
+
+	if (!hash)
+		return NULL;
+
+	index = choose_orig(data, hash->size);
+	head = &hash->table[index];
+
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(hna_global_entry, node, head, hash_entry) {
+		if (!compare_eth(hna_global_entry, data))
+			continue;
+
+		hna_global_entry_tmp = hna_global_entry;
+		break;
+	}
+	rcu_read_unlock();
+
+	return hna_global_entry_tmp;
+}
+
 int hna_local_init(struct bat_priv *bat_priv)
 {
 	if (bat_priv->hna_local_hash)
@@ -60,10 +133,7 @@ void hna_local_add(struct net_device *soft_iface, uint8_t *addr)
 	int required_bytes;
 
 	spin_lock_bh(&bat_priv->hna_lhash_lock);
-	hna_local_entry =
-		((struct hna_local_entry *)hash_find(bat_priv->hna_local_hash,
-						     compare_orig, choose_orig,
-						     addr));
+	hna_local_entry = hna_local_hash_find(bat_priv, addr);
 	spin_unlock_bh(&bat_priv->hna_lhash_lock);
 
 	if (hna_local_entry) {
@@ -99,15 +169,15 @@ void hna_local_add(struct net_device *soft_iface, uint8_t *addr)
 	hna_local_entry->last_seen = jiffies;
 
 	/* the batman interface mac address should never be purged */
-	if (compare_orig(addr, soft_iface->dev_addr))
+	if (compare_eth(addr, soft_iface->dev_addr))
 		hna_local_entry->never_purge = 1;
 	else
 		hna_local_entry->never_purge = 0;
 
 	spin_lock_bh(&bat_priv->hna_lhash_lock);
 
-	hash_add(bat_priv->hna_local_hash, compare_orig, choose_orig,
-		 hna_local_entry);
+	hash_add(bat_priv->hna_local_hash, compare_lhna, choose_orig,
+		 hna_local_entry, &hna_local_entry->hash_entry);
 	bat_priv->num_local_hna++;
 	atomic_set(&bat_priv->hna_local_changed, 1);
 
@@ -116,9 +186,7 @@ void hna_local_add(struct net_device *soft_iface, uint8_t *addr)
 	/* remove address from global hash if present */
 	spin_lock_bh(&bat_priv->hna_ghash_lock);
 
-	hna_global_entry = ((struct hna_global_entry *)
-				hash_find(bat_priv->hna_global_hash,
-					  compare_orig, choose_orig, addr));
+	hna_global_entry = hna_global_hash_find(bat_priv, addr);
 
 	if (hna_global_entry)
 		_hna_global_del_orig(bat_priv, hna_global_entry,
@@ -132,28 +200,27 @@ int hna_local_fill_buffer(struct bat_priv *bat_priv,
 {
 	struct hashtable_t *hash = bat_priv->hna_local_hash;
 	struct hna_local_entry *hna_local_entry;
-	struct element_t *bucket;
-	int i;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	int count = 0;
+	int i, count = 0;
 
 	spin_lock_bh(&bat_priv->hna_lhash_lock);
 
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(hna_local_entry, node,
+					 head, hash_entry) {
 			if (buff_len < (count + 1) * ETH_ALEN)
 				break;
 
-			hna_local_entry = bucket->data;
 			memcpy(buff + (count * ETH_ALEN), hna_local_entry->addr,
 			       ETH_ALEN);
 
 			count++;
 		}
+		rcu_read_unlock();
 	}
 
 	/* if we did not get all new local hnas see you next time  ;-) */
@@ -170,12 +237,11 @@ int hna_local_seq_print_text(struct seq_file *seq, void *offset)
 	struct bat_priv *bat_priv = netdev_priv(net_dev);
 	struct hashtable_t *hash = bat_priv->hna_local_hash;
 	struct hna_local_entry *hna_local_entry;
-	int i;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	size_t buf_size, pos;
 	char *buff;
+	int i;
 
 	if (!bat_priv->primary_if) {
 		return seq_printf(seq, "BATMAN mesh %s disabled - "
@@ -194,8 +260,10 @@ int hna_local_seq_print_text(struct seq_file *seq, void *offset)
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each(walk, head)
+		rcu_read_lock();
+		__hlist_for_each_rcu(node, head)
 			buf_size += 21;
+		rcu_read_unlock();
 	}
 
 	buff = kmalloc(buf_size, GFP_ATOMIC);
@@ -203,18 +271,20 @@ int hna_local_seq_print_text(struct seq_file *seq, void *offset)
 		spin_unlock_bh(&bat_priv->hna_lhash_lock);
 		return -ENOMEM;
 	}
+
 	buff[0] = '\0';
 	pos = 0;
 
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			hna_local_entry = bucket->data;
-
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(hna_local_entry, node,
+					 head, hash_entry) {
 			pos += snprintf(buff + pos, 22, " * %pM\n",
 					hna_local_entry->addr);
 		}
+		rcu_read_unlock();
 	}
 
 	spin_unlock_bh(&bat_priv->hna_lhash_lock);
@@ -224,9 +294,10 @@ int hna_local_seq_print_text(struct seq_file *seq, void *offset)
 	return 0;
 }
 
-static void _hna_local_del(void *data, void *arg)
+static void _hna_local_del(struct hlist_node *node, void *arg)
 {
 	struct bat_priv *bat_priv = (struct bat_priv *)arg;
+	void *data = container_of(node, struct hna_local_entry, hash_entry);
 
 	kfree(data);
 	bat_priv->num_local_hna--;
@@ -240,9 +311,9 @@ static void hna_local_del(struct bat_priv *bat_priv,
 	bat_dbg(DBG_ROUTES, bat_priv, "Deleting local hna entry (%pM): %s\n",
 		hna_local_entry->addr, message);
 
-	hash_remove(bat_priv->hna_local_hash, compare_orig, choose_orig,
+	hash_remove(bat_priv->hna_local_hash, compare_lhna, choose_orig,
 		    hna_local_entry->addr);
-	_hna_local_del(hna_local_entry, bat_priv);
+	_hna_local_del(&hna_local_entry->hash_entry, bat_priv);
 }
 
 void hna_local_remove(struct bat_priv *bat_priv,
@@ -252,9 +323,7 @@ void hna_local_remove(struct bat_priv *bat_priv,
 
 	spin_lock_bh(&bat_priv->hna_lhash_lock);
 
-	hna_local_entry = (struct hna_local_entry *)
-		hash_find(bat_priv->hna_local_hash, compare_orig, choose_orig,
-			  addr);
+	hna_local_entry = hna_local_hash_find(bat_priv, addr);
 
 	if (hna_local_entry)
 		hna_local_del(bat_priv, hna_local_entry, message);
@@ -270,27 +339,29 @@ static void hna_local_purge(struct work_struct *work)
 		container_of(delayed_work, struct bat_priv, hna_work);
 	struct hashtable_t *hash = bat_priv->hna_local_hash;
 	struct hna_local_entry *hna_local_entry;
-	int i;
-	struct hlist_node *walk, *safe;
+	struct hlist_node *node, *node_tmp;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	unsigned long timeout;
+	int i;
 
 	spin_lock_bh(&bat_priv->hna_lhash_lock);
 
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry_safe(bucket, walk, safe, head, hlist) {
-			hna_local_entry = bucket->data;
+		hlist_for_each_entry_safe(hna_local_entry, node, node_tmp,
+					  head, hash_entry) {
+			if (hna_local_entry->never_purge)
+				continue;
 
 			timeout = hna_local_entry->last_seen;
 			timeout += LOCAL_HNA_TIMEOUT * HZ;
 
-			if ((!hna_local_entry->never_purge) &&
-			    time_after(jiffies, timeout))
-				hna_local_del(bat_priv, hna_local_entry,
-					"address timed out");
+			if (time_before(jiffies, timeout))
+				continue;
+
+			hna_local_del(bat_priv, hna_local_entry,
+				      "address timed out");
 		}
 	}
 
@@ -334,9 +405,7 @@ void hna_global_add_orig(struct bat_priv *bat_priv,
 		spin_lock_bh(&bat_priv->hna_ghash_lock);
 
 		hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
-		hna_global_entry = (struct hna_global_entry *)
-			hash_find(bat_priv->hna_global_hash, compare_orig,
-				  choose_orig, hna_ptr);
+		hna_global_entry = hna_global_hash_find(bat_priv, hna_ptr);
 
 		if (!hna_global_entry) {
 			spin_unlock_bh(&bat_priv->hna_ghash_lock);
@@ -356,8 +425,9 @@ void hna_global_add_orig(struct bat_priv *bat_priv,
 				hna_global_entry->addr, orig_node->orig);
 
 			spin_lock_bh(&bat_priv->hna_ghash_lock);
-			hash_add(bat_priv->hna_global_hash, compare_orig,
-				 choose_orig, hna_global_entry);
+			hash_add(bat_priv->hna_global_hash, compare_ghna,
+				 choose_orig, hna_global_entry,
+				 &hna_global_entry->hash_entry);
 
 		}
 
@@ -368,9 +438,7 @@ void hna_global_add_orig(struct bat_priv *bat_priv,
 		spin_lock_bh(&bat_priv->hna_lhash_lock);
 
 		hna_ptr = hna_buff + (hna_buff_count * ETH_ALEN);
-		hna_local_entry = (struct hna_local_entry *)
-			hash_find(bat_priv->hna_local_hash, compare_orig,
-				  choose_orig, hna_ptr);
+		hna_local_entry = hna_local_hash_find(bat_priv, hna_ptr);
 
 		if (hna_local_entry)
 			hna_local_del(bat_priv, hna_local_entry,
@@ -400,12 +468,11 @@ int hna_global_seq_print_text(struct seq_file *seq, void *offset)
 	struct bat_priv *bat_priv = netdev_priv(net_dev);
 	struct hashtable_t *hash = bat_priv->hna_global_hash;
 	struct hna_global_entry *hna_global_entry;
-	int i;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	size_t buf_size, pos;
 	char *buff;
+	int i;
 
 	if (!bat_priv->primary_if) {
 		return seq_printf(seq, "BATMAN mesh %s disabled - "
@@ -423,8 +490,10 @@ int hna_global_seq_print_text(struct seq_file *seq, void *offset)
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each(walk, head)
+		rcu_read_lock();
+		__hlist_for_each_rcu(node, head)
 			buf_size += 43;
+		rcu_read_unlock();
 	}
 
 	buff = kmalloc(buf_size, GFP_ATOMIC);
@@ -438,14 +507,15 @@ int hna_global_seq_print_text(struct seq_file *seq, void *offset)
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			hna_global_entry = bucket->data;
-
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(hna_global_entry, node,
+					 head, hash_entry) {
 			pos += snprintf(buff + pos, 44,
 					" * %pM via %pM\n",
 					hna_global_entry->addr,
 					hna_global_entry->orig_node->orig);
 		}
+		rcu_read_unlock();
 	}
 
 	spin_unlock_bh(&bat_priv->hna_ghash_lock);
@@ -464,7 +534,7 @@ static void _hna_global_del_orig(struct bat_priv *bat_priv,
 		hna_global_entry->addr, hna_global_entry->orig_node->orig,
 		message);
 
-	hash_remove(bat_priv->hna_global_hash, compare_orig, choose_orig,
+	hash_remove(bat_priv->hna_global_hash, compare_ghna, choose_orig,
 		    hna_global_entry->addr);
 	kfree(hna_global_entry);
 }
@@ -483,9 +553,7 @@ void hna_global_del_orig(struct bat_priv *bat_priv,
 
 	while ((hna_buff_count + 1) * ETH_ALEN <= orig_node->hna_buff_len) {
 		hna_ptr = orig_node->hna_buff + (hna_buff_count * ETH_ALEN);
-		hna_global_entry = (struct hna_global_entry *)
-			hash_find(bat_priv->hna_global_hash, compare_orig,
-				  choose_orig, hna_ptr);
+		hna_global_entry = hna_global_hash_find(bat_priv, hna_ptr);
 
 		if ((hna_global_entry) &&
 		    (hna_global_entry->orig_node == orig_node))
@@ -502,8 +570,10 @@ void hna_global_del_orig(struct bat_priv *bat_priv,
 	orig_node->hna_buff = NULL;
 }
 
-static void hna_global_del(void *data, void *arg)
+static void hna_global_del(struct hlist_node *node, void *arg)
 {
+	void *data = container_of(node, struct hna_global_entry, hash_entry);
+
 	kfree(data);
 }
 
@@ -519,15 +589,20 @@ void hna_global_free(struct bat_priv *bat_priv)
 struct orig_node *transtable_search(struct bat_priv *bat_priv, uint8_t *addr)
 {
 	struct hna_global_entry *hna_global_entry;
+	struct orig_node *orig_node = NULL;
 
 	spin_lock_bh(&bat_priv->hna_ghash_lock);
-	hna_global_entry = (struct hna_global_entry *)
-				hash_find(bat_priv->hna_global_hash,
-					  compare_orig, choose_orig, addr);
-	spin_unlock_bh(&bat_priv->hna_ghash_lock);
+	hna_global_entry = hna_global_hash_find(bat_priv, addr);
 
 	if (!hna_global_entry)
-		return NULL;
+		goto out;
 
-	return hna_global_entry->orig_node;
+	if (!atomic_inc_not_zero(&hna_global_entry->orig_node->refcount))
+		goto out;
+
+	orig_node = hna_global_entry->orig_node;
+
+out:
+	spin_unlock_bh(&bat_priv->hna_ghash_lock);
+	return orig_node;
 }

net/batman-adv/types.h

@@ -33,7 +33,7 @@
 	 sizeof(struct bcast_packet))))
 
 
-struct batman_if {
+struct hard_iface {
 	struct list_head list;
 	int16_t if_num;
 	char if_status;
@@ -43,7 +43,7 @@ struct batman_if {
 	unsigned char *packet_buff;
 	int packet_len;
 	struct kobject *hardif_obj;
-	struct kref refcount;
+	atomic_t refcount;
 	struct packet_type batman_adv_ptype;
 	struct net_device *soft_iface;
 	struct rcu_head rcu;
@@ -70,8 +70,6 @@ struct orig_node {
 	struct neigh_node *router;
 	unsigned long *bcast_own;
 	uint8_t *bcast_own_sum;
-	uint8_t tq_own;
-	int tq_asym_penalty;
 	unsigned long last_valid;
 	unsigned long bcast_seqno_reset;
 	unsigned long batman_seqno_reset;
@@ -83,20 +81,28 @@ struct orig_node {
 	uint8_t last_ttl;
 	unsigned long bcast_bits[NUM_WORDS];
 	uint32_t last_bcast_seqno;
-	struct list_head neigh_list;
+	struct hlist_head neigh_list;
 	struct list_head frag_list;
+	spinlock_t neigh_list_lock; /* protects neighbor list */
+	atomic_t refcount;
+	struct rcu_head rcu;
+	struct hlist_node hash_entry;
+	struct bat_priv *bat_priv;
 	unsigned long last_frag_packet;
-	struct {
-		uint8_t candidates;
-		struct neigh_node *selected;
-	} bond;
+	spinlock_t ogm_cnt_lock; /* protects: bcast_own, bcast_own_sum,
+				  * neigh_node->real_bits,
+				  * neigh_node->real_packet_count */
+	spinlock_t bcast_seqno_lock; /* protects bcast_bits,
+				      *	 last_bcast_seqno */
+	atomic_t bond_candidates;
+	struct list_head bond_list;
 };
 
 struct gw_node {
 	struct hlist_node list;
 	struct orig_node *orig_node;
 	unsigned long deleted;
-	struct kref refcount;
+	atomic_t refcount;
 	struct rcu_head rcu;
 };
 
@@ -105,18 +111,20 @@ struct gw_node {
  *	@last_valid: when last packet via this neighbor was received
  */
 struct neigh_node {
-	struct list_head list;
+	struct hlist_node list;
 	uint8_t addr[ETH_ALEN];
 	uint8_t real_packet_count;
 	uint8_t tq_recv[TQ_GLOBAL_WINDOW_SIZE];
 	uint8_t tq_index;
 	uint8_t tq_avg;
 	uint8_t last_ttl;
-	struct neigh_node *next_bond_candidate;
+	struct list_head bonding_list;
 	unsigned long last_valid;
 	unsigned long real_bits[NUM_WORDS];
+	atomic_t refcount;
+	struct rcu_head rcu;
 	struct orig_node *orig_node;
-	struct batman_if *if_incoming;
+	struct hard_iface *if_incoming;
 };
 
 
@@ -140,7 +148,7 @@ struct bat_priv {
 	struct hlist_head softif_neigh_list;
 	struct softif_neigh *softif_neigh;
 	struct debug_log *debug_log;
-	struct batman_if *primary_if;
+	struct hard_iface *primary_if;
 	struct kobject *mesh_obj;
 	struct dentry *debug_dir;
 	struct hlist_head forw_bat_list;
@@ -151,12 +159,11 @@ struct bat_priv {
 	struct hashtable_t *hna_local_hash;
 	struct hashtable_t *hna_global_hash;
 	struct hashtable_t *vis_hash;
-	spinlock_t orig_hash_lock; /* protects orig_hash */
 	spinlock_t forw_bat_list_lock; /* protects forw_bat_list */
 	spinlock_t forw_bcast_list_lock; /* protects  */
 	spinlock_t hna_lhash_lock; /* protects hna_local_hash */
 	spinlock_t hna_ghash_lock; /* protects hna_global_hash */
-	spinlock_t gw_list_lock; /* protects gw_list */
+	spinlock_t gw_list_lock; /* protects gw_list and curr_gw */
 	spinlock_t vis_hash_lock; /* protects vis_hash */
 	spinlock_t vis_list_lock; /* protects vis_info::recv_list */
 	spinlock_t softif_neigh_lock; /* protects soft-interface neigh list */
@@ -165,7 +172,7 @@ struct bat_priv {
 	struct delayed_work hna_work;
 	struct delayed_work orig_work;
 	struct delayed_work vis_work;
-	struct gw_node *curr_gw;
+	struct gw_node __rcu *curr_gw;  /* rcu protected pointer */
 	struct vis_info *my_vis_info;
 };
 
@@ -188,11 +195,13 @@ struct hna_local_entry {
 	uint8_t addr[ETH_ALEN];
 	unsigned long last_seen;
 	char never_purge;
+	struct hlist_node hash_entry;
 };
 
 struct hna_global_entry {
 	uint8_t addr[ETH_ALEN];
 	struct orig_node *orig_node;
+	struct hlist_node hash_entry;
 };
 
 /**
@@ -208,7 +217,7 @@ struct forw_packet {
 	uint32_t direct_link_flags;
 	uint8_t num_packets;
 	struct delayed_work delayed_work;
-	struct batman_if *if_incoming;
+	struct hard_iface *if_incoming;
 };
 
 /* While scanning for vis-entries of a particular vis-originator
@@ -242,6 +251,7 @@ struct vis_info {
 			     * from.  we should not reply to them. */
 	struct list_head send_list;
 	struct kref refcount;
+	struct hlist_node hash_entry;
 	struct bat_priv *bat_priv;
 	/* this packet might be part of the vis send queue. */
 	struct sk_buff *skb_packet;
@@ -264,7 +274,7 @@ struct softif_neigh {
 	uint8_t addr[ETH_ALEN];
 	unsigned long last_seen;
 	short vid;
-	struct kref refcount;
+	atomic_t refcount;
 	struct rcu_head rcu;
 };
 

net/batman-adv/unicast.c

@@ -183,15 +183,10 @@ int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
 		(struct unicast_frag_packet *)skb->data;
 
 	*new_skb = NULL;
-	spin_lock_bh(&bat_priv->orig_hash_lock);
-	orig_node = ((struct orig_node *)
-		    hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
-			      unicast_packet->orig));
 
-	if (!orig_node) {
-		pr_debug("couldn't find originator in orig_hash\n");
+	orig_node = orig_hash_find(bat_priv, unicast_packet->orig);
+	if (!orig_node)
 		goto out;
-	}
 
 	orig_node->last_frag_packet = jiffies;
 
@@ -215,14 +210,15 @@ int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
 	/* if not, merge failed */
 	if (*new_skb)
 		ret = NET_RX_SUCCESS;
-out:
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
 
+out:
+	if (orig_node)
+		orig_node_free_ref(orig_node);
 	return ret;
 }
 
 int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
-		  struct batman_if *batman_if, uint8_t dstaddr[])
+		  struct hard_iface *hard_iface, uint8_t dstaddr[])
 {
 	struct unicast_packet tmp_uc, *unicast_packet;
 	struct sk_buff *frag_skb;
@@ -267,12 +263,12 @@ int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
 	frag1->flags = UNI_FRAG_HEAD | large_tail;
 	frag2->flags = large_tail;
 
-	seqno = atomic_add_return(2, &batman_if->frag_seqno);
+	seqno = atomic_add_return(2, &hard_iface->frag_seqno);
 	frag1->seqno = htons(seqno - 1);
 	frag2->seqno = htons(seqno);
 
-	send_skb_packet(skb, batman_if, dstaddr);
-	send_skb_packet(frag_skb, batman_if, dstaddr);
+	send_skb_packet(skb, hard_iface, dstaddr);
+	send_skb_packet(frag_skb, hard_iface, dstaddr);
 	return NET_RX_SUCCESS;
 
 drop_frag:
@@ -286,40 +282,37 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
 {
 	struct ethhdr *ethhdr = (struct ethhdr *)skb->data;
 	struct unicast_packet *unicast_packet;
-	struct orig_node *orig_node = NULL;
-	struct batman_if *batman_if;
-	struct neigh_node *router;
+	struct orig_node *orig_node;
+	struct neigh_node *neigh_node;
 	int data_len = skb->len;
-	uint8_t dstaddr[6];
-
-	spin_lock_bh(&bat_priv->orig_hash_lock);
+	int ret = 1;
 
 	/* get routing information */
-	if (is_multicast_ether_addr(ethhdr->h_dest))
+	if (is_multicast_ether_addr(ethhdr->h_dest)) {
 		orig_node = (struct orig_node *)gw_get_selected(bat_priv);
+		if (orig_node)
+			goto find_router;
+	}
 
-	/* check for hna host */
-	if (!orig_node)
-		orig_node = transtable_search(bat_priv, ethhdr->h_dest);
-
-	router = find_router(bat_priv, orig_node, NULL);
-
-	if (!router)
-		goto unlock;
-
-	/* don't lock while sending the packets ... we therefore
-		* copy the required data before sending */
+	/* check for hna host - increases orig_node refcount */
+	orig_node = transtable_search(bat_priv, ethhdr->h_dest);
 
-	batman_if = router->if_incoming;
-	memcpy(dstaddr, router->addr, ETH_ALEN);
+find_router:
+	/**
+	 * find_router():
+	 *  - if orig_node is NULL it returns NULL
+	 *  - increases neigh_nodes refcount if found.
+	 */
+	neigh_node = find_router(bat_priv, orig_node, NULL);
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	if (!neigh_node)
+		goto out;
 
-	if (batman_if->if_status != IF_ACTIVE)
-		goto dropped;
+	if (neigh_node->if_incoming->if_status != IF_ACTIVE)
+		goto out;
 
 	if (my_skb_head_push(skb, sizeof(struct unicast_packet)) < 0)
-		goto dropped;
+		goto out;
 
 	unicast_packet = (struct unicast_packet *)skb->data;
 
@@ -333,18 +326,24 @@ int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv)
 
 	if (atomic_read(&bat_priv->fragmentation) &&
 	    data_len + sizeof(struct unicast_packet) >
-	    batman_if->net_dev->mtu) {
+				neigh_node->if_incoming->net_dev->mtu) {
 		/* send frag skb decreases ttl */
 		unicast_packet->ttl++;
-		return frag_send_skb(skb, bat_priv, batman_if,
-				     dstaddr);
+		ret = frag_send_skb(skb, bat_priv,
+				    neigh_node->if_incoming, neigh_node->addr);
+		goto out;
 	}
-	send_skb_packet(skb, batman_if, dstaddr);
-	return 0;
 
-unlock:
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
-dropped:
-	kfree_skb(skb);
-	return 1;
+	send_skb_packet(skb, neigh_node->if_incoming, neigh_node->addr);
+	ret = 0;
+	goto out;
+
+out:
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		orig_node_free_ref(orig_node);
+	if (ret == 1)
+		kfree_skb(skb);
+	return ret;
 }

net/batman-adv/unicast.h

@@ -32,7 +32,7 @@ int frag_reassemble_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
 void frag_list_free(struct list_head *head);
 int unicast_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv);
 int frag_send_skb(struct sk_buff *skb, struct bat_priv *bat_priv,
-		  struct batman_if *batman_if, uint8_t dstaddr[]);
+		  struct hard_iface *hard_iface, uint8_t dstaddr[]);
 
 static inline int frag_can_reassemble(struct sk_buff *skb, int mtu)
 {

net/batman-adv/vis.c

@@ -68,15 +68,16 @@ static void free_info(struct kref *ref)
 }
 
 /* Compare two vis packets, used by the hashing algorithm */
-static int vis_info_cmp(void *data1, void *data2)
+static int vis_info_cmp(struct hlist_node *node, void *data2)
 {
 	struct vis_info *d1, *d2;
 	struct vis_packet *p1, *p2;
-	d1 = data1;
+
+	d1 = container_of(node, struct vis_info, hash_entry);
 	d2 = data2;
 	p1 = (struct vis_packet *)d1->skb_packet->data;
 	p2 = (struct vis_packet *)d2->skb_packet->data;
-	return compare_orig(p1->vis_orig, p2->vis_orig);
+	return compare_eth(p1->vis_orig, p2->vis_orig);
 }
 
 /* hash function to choose an entry in a hash table of given size */
@@ -104,6 +105,34 @@ static int vis_info_choose(void *data, int size)
 	return hash % size;
 }
 
+static struct vis_info *vis_hash_find(struct bat_priv *bat_priv,
+				      void *data)
+{
+	struct hashtable_t *hash = bat_priv->vis_hash;
+	struct hlist_head *head;
+	struct hlist_node *node;
+	struct vis_info *vis_info, *vis_info_tmp = NULL;
+	int index;
+
+	if (!hash)
+		return NULL;
+
+	index = vis_info_choose(data, hash->size);
+	head = &hash->table[index];
+
+	rcu_read_lock();
+	hlist_for_each_entry_rcu(vis_info, node, head, hash_entry) {
+		if (!vis_info_cmp(node, data))
+			continue;
+
+		vis_info_tmp = vis_info;
+		break;
+	}
+	rcu_read_unlock();
+
+	return vis_info_tmp;
+}
+
 /* insert interface to the list of interfaces of one originator, if it
  * does not already exist in the list */
 static void vis_data_insert_interface(const uint8_t *interface,
@@ -114,7 +143,7 @@ static void vis_data_insert_interface(const uint8_t *interface,
 	struct hlist_node *pos;
 
 	hlist_for_each_entry(entry, pos, if_list, list) {
-		if (compare_orig(entry->addr, (void *)interface))
+		if (compare_eth(entry->addr, (void *)interface))
 			return;
 	}
 
@@ -166,7 +195,7 @@ static ssize_t vis_data_read_entry(char *buff, struct vis_info_entry *entry,
 	/* maximal length: max(4+17+2, 3+17+1+3+2) == 26 */
 	if (primary && entry->quality == 0)
 		return sprintf(buff, "HNA %pM, ", entry->dest);
-	else if (compare_orig(entry->src, src))
+	else if (compare_eth(entry->src, src))
 		return sprintf(buff, "TQ %pM %d, ", entry->dest,
 			       entry->quality);
 
@@ -175,9 +204,8 @@ static ssize_t vis_data_read_entry(char *buff, struct vis_info_entry *entry,
 
 int vis_seq_print_text(struct seq_file *seq, void *offset)
 {
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct vis_info *info;
 	struct vis_packet *packet;
 	struct vis_info_entry *entries;
@@ -203,8 +231,8 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			info = bucket->data;
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(info, node, head, hash_entry) {
 			packet = (struct vis_packet *)info->skb_packet->data;
 			entries = (struct vis_info_entry *)
 				((char *)packet + sizeof(struct vis_packet));
@@ -213,7 +241,7 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 				if (entries[j].quality == 0)
 					continue;
 				compare =
-				 compare_orig(entries[j].src, packet->vis_orig);
+				 compare_eth(entries[j].src, packet->vis_orig);
 				vis_data_insert_interface(entries[j].src,
 							  &vis_if_list,
 							  compare);
@@ -223,7 +251,7 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 				buf_size += 18 + 26 * packet->entries;
 
 				/* add primary/secondary records */
-				if (compare_orig(entry->addr, packet->vis_orig))
+				if (compare_eth(entry->addr, packet->vis_orig))
 					buf_size +=
 					  vis_data_count_prim_sec(&vis_if_list);
 
@@ -236,6 +264,7 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 				kfree(entry);
 			}
 		}
+		rcu_read_unlock();
 	}
 
 	buff = kmalloc(buf_size, GFP_ATOMIC);
@@ -249,8 +278,8 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			info = bucket->data;
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(info, node, head, hash_entry) {
 			packet = (struct vis_packet *)info->skb_packet->data;
 			entries = (struct vis_info_entry *)
 				((char *)packet + sizeof(struct vis_packet));
@@ -259,7 +288,7 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 				if (entries[j].quality == 0)
 					continue;
 				compare =
-				 compare_orig(entries[j].src, packet->vis_orig);
+				 compare_eth(entries[j].src, packet->vis_orig);
 				vis_data_insert_interface(entries[j].src,
 							  &vis_if_list,
 							  compare);
@@ -277,7 +306,7 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 							entry->primary);
 
 				/* add primary/secondary records */
-				if (compare_orig(entry->addr, packet->vis_orig))
+				if (compare_eth(entry->addr, packet->vis_orig))
 					buff_pos +=
 					 vis_data_read_prim_sec(buff + buff_pos,
 								&vis_if_list);
@@ -291,6 +320,7 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 				kfree(entry);
 			}
 		}
+		rcu_read_unlock();
 	}
 
 	spin_unlock_bh(&bat_priv->vis_hash_lock);
@@ -345,7 +375,7 @@ static int recv_list_is_in(struct bat_priv *bat_priv,
 
 	spin_lock_bh(&bat_priv->vis_list_lock);
 	list_for_each_entry(entry, recv_list, list) {
-		if (memcmp(entry->mac, mac, ETH_ALEN) == 0) {
+		if (compare_eth(entry->mac, mac)) {
 			spin_unlock_bh(&bat_priv->vis_list_lock);
 			return 1;
 		}
@@ -381,8 +411,7 @@ static struct vis_info *add_packet(struct bat_priv *bat_priv,
 						     sizeof(struct vis_packet));
 
 	memcpy(search_packet->vis_orig, vis_packet->vis_orig, ETH_ALEN);
-	old_info = hash_find(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
-			     &search_elem);
+	old_info = vis_hash_find(bat_priv, &search_elem);
 	kfree_skb(search_elem.skb_packet);
 
 	if (old_info) {
@@ -442,7 +471,7 @@ static struct vis_info *add_packet(struct bat_priv *bat_priv,
 
 	/* try to add it */
 	hash_added = hash_add(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
-			      info);
+			      info, &info->hash_entry);
 	if (hash_added < 0) {
 		/* did not work (for some reason) */
 		kref_put(&info->refcount, free_info);
@@ -529,9 +558,8 @@ static int find_best_vis_server(struct bat_priv *bat_priv,
 				struct vis_info *info)
 {
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct orig_node *orig_node;
 	struct vis_packet *packet;
 	int best_tq = -1, i;
@@ -541,16 +569,17 @@ static int find_best_vis_server(struct bat_priv *bat_priv,
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			orig_node = bucket->data;
+		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)) {
+			    (orig_node->flags & VIS_SERVER) &&
+			    (orig_node->router->tq_avg > best_tq)) {
 				best_tq = orig_node->router->tq_avg;
 				memcpy(packet->target_orig, orig_node->orig,
 				       ETH_ALEN);
 			}
 		}
+		rcu_read_unlock();
 	}
 
 	return best_tq;
@@ -573,9 +602,8 @@ static bool vis_packet_full(struct vis_info *info)
 static int generate_vis_packet(struct bat_priv *bat_priv)
 {
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct orig_node *orig_node;
 	struct neigh_node *neigh_node;
 	struct vis_info *info = (struct vis_info *)bat_priv->my_vis_info;
@@ -587,7 +615,6 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 	info->first_seen = jiffies;
 	packet->vis_type = atomic_read(&bat_priv->vis_mode);
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
 	memcpy(packet->target_orig, broadcast_addr, ETH_ALEN);
 	packet->ttl = TTL;
 	packet->seqno = htonl(ntohl(packet->seqno) + 1);
@@ -597,23 +624,21 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 	if (packet->vis_type == VIS_TYPE_CLIENT_UPDATE) {
 		best_tq = find_best_vis_server(bat_priv, info);
 
-		if (best_tq < 0) {
-			spin_unlock_bh(&bat_priv->orig_hash_lock);
+		if (best_tq < 0)
 			return -1;
-		}
 	}
 
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			orig_node = bucket->data;
+		rcu_read_lock();
+		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
 			neigh_node = orig_node->router;
 
 			if (!neigh_node)
 				continue;
 
-			if (!compare_orig(neigh_node->addr, orig_node->orig))
+			if (!compare_eth(neigh_node->addr, orig_node->orig))
 				continue;
 
 			if (neigh_node->if_incoming->if_status != IF_ACTIVE)
@@ -632,23 +657,19 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 			entry->quality = neigh_node->tq_avg;
 			packet->entries++;
 
-			if (vis_packet_full(info)) {
-				spin_unlock_bh(&bat_priv->orig_hash_lock);
-				return 0;
-			}
+			if (vis_packet_full(info))
+				goto unlock;
 		}
+		rcu_read_unlock();
 	}
 
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
-
 	hash = bat_priv->hna_local_hash;
 
 	spin_lock_bh(&bat_priv->hna_lhash_lock);
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			hna_local_entry = bucket->data;
+		hlist_for_each_entry(hna_local_entry, node, head, hash_entry) {
 			entry = (struct vis_info_entry *)
 					skb_put(info->skb_packet,
 						sizeof(*entry));
@@ -666,6 +687,10 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 
 	spin_unlock_bh(&bat_priv->hna_lhash_lock);
 	return 0;
+
+unlock:
+	rcu_read_unlock();
+	return 0;
 }
 
 /* free old vis packets. Must be called with this vis_hash_lock
@@ -674,25 +699,22 @@ static void purge_vis_packets(struct bat_priv *bat_priv)
 {
 	int i;
 	struct hashtable_t *hash = bat_priv->vis_hash;
-	struct hlist_node *walk, *safe;
+	struct hlist_node *node, *node_tmp;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct vis_info *info;
 
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry_safe(bucket, walk, safe, head, hlist) {
-			info = bucket->data;
-
+		hlist_for_each_entry_safe(info, node, node_tmp,
+					  head, hash_entry) {
 			/* never purge own data. */
 			if (info == bat_priv->my_vis_info)
 				continue;
 
 			if (time_after(jiffies,
 				       info->first_seen + VIS_TIMEOUT * HZ)) {
-				hlist_del(walk);
-				kfree(bucket);
+				hlist_del(node);
 				send_list_del(info);
 				kref_put(&info->refcount, free_info);
 			}
@@ -704,27 +726,24 @@ static void broadcast_vis_packet(struct bat_priv *bat_priv,
 				 struct vis_info *info)
 {
 	struct hashtable_t *hash = bat_priv->orig_hash;
-	struct hlist_node *walk;
+	struct hlist_node *node;
 	struct hlist_head *head;
-	struct element_t *bucket;
 	struct orig_node *orig_node;
 	struct vis_packet *packet;
 	struct sk_buff *skb;
-	struct batman_if *batman_if;
+	struct hard_iface *hard_iface;
 	uint8_t dstaddr[ETH_ALEN];
 	int i;
 
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
 	packet = (struct vis_packet *)info->skb_packet->data;
 
 	/* send to all routers in range. */
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(bucket, walk, head, hlist) {
-			orig_node = bucket->data;
-
+		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;
@@ -737,54 +756,61 @@ static void broadcast_vis_packet(struct bat_priv *bat_priv,
 				continue;
 
 			memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
-			batman_if = orig_node->router->if_incoming;
+			hard_iface = orig_node->router->if_incoming;
 			memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-			spin_unlock_bh(&bat_priv->orig_hash_lock);
 
 			skb = skb_clone(info->skb_packet, GFP_ATOMIC);
 			if (skb)
-				send_skb_packet(skb, batman_if, dstaddr);
+				send_skb_packet(skb, hard_iface, dstaddr);
 
-			spin_lock_bh(&bat_priv->orig_hash_lock);
 		}
-
+		rcu_read_unlock();
 	}
-
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
 }
 
 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 sk_buff *skb;
 	struct vis_packet *packet;
-	struct batman_if *batman_if;
-	uint8_t dstaddr[ETH_ALEN];
 
-	spin_lock_bh(&bat_priv->orig_hash_lock);
 	packet = (struct vis_packet *)info->skb_packet->data;
-	orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
-						   compare_orig, choose_orig,
-						   packet->target_orig));
 
-	if ((!orig_node) || (!orig_node->router))
-		goto out;
+	rcu_read_lock();
+	orig_node = orig_hash_find(bat_priv, packet->target_orig);
 
-	/* don't lock while sending the packets ... we therefore
-	 * copy the required data before sending */
-	batman_if = orig_node->router->if_incoming;
-	memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	if (!orig_node)
+		goto unlock;
+
+	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();
 
 	skb = skb_clone(info->skb_packet, GFP_ATOMIC);
 	if (skb)
-		send_skb_packet(skb, batman_if, dstaddr);
+		send_skb_packet(skb, neigh_node->if_incoming,
+				neigh_node->addr);
 
-	return;
+	goto out;
 
+unlock:
+	rcu_read_unlock();
 out:
-	spin_unlock_bh(&bat_priv->orig_hash_lock);
+	if (neigh_node)
+		neigh_node_free_ref(neigh_node);
+	if (orig_node)
+		orig_node_free_ref(orig_node);
+	return;
 }
 
 /* only send one vis packet. called from send_vis_packets() */
@@ -896,7 +922,8 @@ int vis_init(struct bat_priv *bat_priv)
 	INIT_LIST_HEAD(&bat_priv->vis_send_list);
 
 	hash_added = hash_add(bat_priv->vis_hash, vis_info_cmp, vis_info_choose,
-			      bat_priv->my_vis_info);
+			      bat_priv->my_vis_info,
+			      &bat_priv->my_vis_info->hash_entry);
 	if (hash_added < 0) {
 		pr_err("Can't add own vis packet into hash\n");
 		/* not in hash, need to remove it manually. */
@@ -918,10 +945,11 @@ int vis_init(struct bat_priv *bat_priv)
 }
 
 /* Decrease the reference count on a hash item info */
-static void free_info_ref(void *data, void *arg)
+static void free_info_ref(struct hlist_node *node, void *arg)
 {
-	struct vis_info *info = data;
+	struct vis_info *info;
 
+	info = container_of(node, struct vis_info, hash_entry);
 	send_list_del(info);
 	kref_put(&info->refcount, free_info);
 }