1 files changed, 80 insertions, 66 deletions

diff --git a/net/batman-adv/vis.c b/net/batman-adv/vis.c
index f90212f42082..c39f20cc1ba6 100644
--- a/net/batman-adv/vis.c
+++ b/net/batman-adv/vis.c
@@ -194,7 +194,7 @@ 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);
+		return sprintf(buff, "TT %pM, ", entry->dest);
 	else if (compare_eth(entry->src, src))
 		return sprintf(buff, "TQ %pM %d, ", entry->dest,
 			       entry->quality);
@@ -204,6 +204,7 @@ 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 hard_iface *primary_if;
 	struct hlist_node *node;
 	struct hlist_head *head;
 	struct vis_info *info;
@@ -215,15 +216,18 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 	HLIST_HEAD(vis_if_list);
 	struct if_list_entry *entry;
 	struct hlist_node *pos, *n;
-	int i, j;
+	int i, j, ret = 0;
 	int vis_server = atomic_read(&bat_priv->vis_mode);
 	size_t buff_pos, buf_size;
 	char *buff;
 	int compare;
 
-	if ((!bat_priv->primary_if) ||
-	    (vis_server == VIS_TYPE_CLIENT_UPDATE))
-		return 0;
+	primary_if = primary_if_get_selected(bat_priv);
+	if (!primary_if)
+		goto out;
+
+	if (vis_server == VIS_TYPE_CLIENT_UPDATE)
+		goto out;
 
 	buf_size = 1;
 	/* Estimate length */
@@ -270,7 +274,8 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 	buff = kmalloc(buf_size, GFP_ATOMIC);
 	if (!buff) {
 		spin_unlock_bh(&bat_priv->vis_hash_lock);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 	buff[0] = '\0';
 	buff_pos = 0;
@@ -328,7 +333,10 @@ int vis_seq_print_text(struct seq_file *seq, void *offset)
 	seq_printf(seq, "%s", buff);
 	kfree(buff);
 
-	return 0;
+out:
+	if (primary_if)
+		hardif_free_ref(primary_if);
+	return ret;
 }
 
 /* add the info packet to the send list, if it was not
@@ -558,6 +566,7 @@ static int find_best_vis_server(struct bat_priv *bat_priv,
 				struct vis_info *info)
 {
 	struct hashtable_t *hash = bat_priv->orig_hash;
+	struct neigh_node *router;
 	struct hlist_node *node;
 	struct hlist_head *head;
 	struct orig_node *orig_node;
@@ -571,13 +580,17 @@ static int find_best_vis_server(struct bat_priv *bat_priv,
 
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
-			if ((orig_node) && (orig_node->router) &&
-			    (orig_node->flags & VIS_SERVER) &&
-			    (orig_node->router->tq_avg > best_tq)) {
-				best_tq = orig_node->router->tq_avg;
+			router = orig_node_get_router(orig_node);
+			if (!router)
+				continue;
+
+			if ((orig_node->flags & VIS_SERVER) &&
+			    (router->tq_avg > best_tq)) {
+				best_tq = router->tq_avg;
 				memcpy(packet->target_orig, orig_node->orig,
 				       ETH_ALEN);
 			}
+			neigh_node_free_ref(router);
 		}
 		rcu_read_unlock();
 	}
@@ -605,11 +618,11 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 	struct hlist_node *node;
 	struct hlist_head *head;
 	struct orig_node *orig_node;
-	struct neigh_node *neigh_node;
+	struct neigh_node *router;
 	struct vis_info *info = (struct vis_info *)bat_priv->my_vis_info;
 	struct vis_packet *packet = (struct vis_packet *)info->skb_packet->data;
 	struct vis_info_entry *entry;
-	struct hna_local_entry *hna_local_entry;
+	struct tt_local_entry *tt_local_entry;
 	int best_tq = -1, i;
 
 	info->first_seen = jiffies;
@@ -633,59 +646,61 @@ static int generate_vis_packet(struct bat_priv *bat_priv)
 
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
-			neigh_node = orig_node->router;
-
-			if (!neigh_node)
+			router = orig_node_get_router(orig_node);
+			if (!router)
 				continue;
 
-			if (!compare_eth(neigh_node->addr, orig_node->orig))
-				continue;
+			if (!compare_eth(router->addr, orig_node->orig))
+				goto next;
 
-			if (neigh_node->if_incoming->if_status != IF_ACTIVE)
-				continue;
+			if (router->if_incoming->if_status != IF_ACTIVE)
+				goto next;
 
-			if (neigh_node->tq_avg < 1)
-				continue;
+			if (router->tq_avg < 1)
+				goto next;
 
 			/* fill one entry into buffer. */
 			entry = (struct vis_info_entry *)
 				      skb_put(info->skb_packet, sizeof(*entry));
 			memcpy(entry->src,
-			       neigh_node->if_incoming->net_dev->dev_addr,
+			       router->if_incoming->net_dev->dev_addr,
 			       ETH_ALEN);
 			memcpy(entry->dest, orig_node->orig, ETH_ALEN);
-			entry->quality = neigh_node->tq_avg;
+			entry->quality = router->tq_avg;
 			packet->entries++;
 
+next:
+			neigh_node_free_ref(router);
+
 			if (vis_packet_full(info))
 				goto unlock;
 		}
 		rcu_read_unlock();
 	}
 
-	hash = bat_priv->hna_local_hash;
+	hash = bat_priv->tt_local_hash;
 
-	spin_lock_bh(&bat_priv->hna_lhash_lock);
+	spin_lock_bh(&bat_priv->tt_lhash_lock);
 	for (i = 0; i < hash->size; i++) {
 		head = &hash->table[i];
 
-		hlist_for_each_entry(hna_local_entry, node, head, hash_entry) {
+		hlist_for_each_entry(tt_local_entry, node, head, hash_entry) {
 			entry = (struct vis_info_entry *)
 					skb_put(info->skb_packet,
 						sizeof(*entry));
 			memset(entry->src, 0, ETH_ALEN);
-			memcpy(entry->dest, hna_local_entry->addr, ETH_ALEN);
-			entry->quality = 0; /* 0 means HNA */
+			memcpy(entry->dest, tt_local_entry->addr, ETH_ALEN);
+			entry->quality = 0; /* 0 means TT */
 			packet->entries++;
 
 			if (vis_packet_full(info)) {
-				spin_unlock_bh(&bat_priv->hna_lhash_lock);
+				spin_unlock_bh(&bat_priv->tt_lhash_lock);
 				return 0;
 			}
 		}
 	}
 
-	spin_unlock_bh(&bat_priv->hna_lhash_lock);
+	spin_unlock_bh(&bat_priv->tt_lhash_lock);
 	return 0;
 
 unlock:
@@ -725,6 +740,7 @@ static void purge_vis_packets(struct bat_priv *bat_priv)
 static void broadcast_vis_packet(struct bat_priv *bat_priv,
 				 struct vis_info *info)
 {
+	struct neigh_node *router;
 	struct hashtable_t *hash = bat_priv->orig_hash;
 	struct hlist_node *node;
 	struct hlist_head *head;
@@ -745,19 +761,26 @@ static void broadcast_vis_packet(struct bat_priv *bat_priv,
 		rcu_read_lock();
 		hlist_for_each_entry_rcu(orig_node, node, head, hash_entry) {
 			/* if it's a vis server and reachable, send it. */
-			if ((!orig_node) || (!orig_node->router))
-				continue;
 			if (!(orig_node->flags & VIS_SERVER))
 				continue;
+
+			router = orig_node_get_router(orig_node);
+			if (!router)
+				continue;
+
 			/* don't send it if we already received the packet from
-			* this node. */
+			 * this node. */
 			if (recv_list_is_in(bat_priv, &info->recv_list,
-					    orig_node->orig))
+					    orig_node->orig)) {
+				neigh_node_free_ref(router);
 				continue;
+			}
 
 			memcpy(packet->target_orig, orig_node->orig, ETH_ALEN);
-			hard_iface = orig_node->router->if_incoming;
-			memcpy(dstaddr, orig_node->router->addr, ETH_ALEN);
+			hard_iface = router->if_incoming;
+			memcpy(dstaddr, router->addr, ETH_ALEN);
+
+			neigh_node_free_ref(router);
 
 			skb = skb_clone(info->skb_packet, GFP_ATOMIC);
 			if (skb)
@@ -772,60 +795,48 @@ static void unicast_vis_packet(struct bat_priv *bat_priv,
 			       struct vis_info *info)
 {
 	struct orig_node *orig_node;
-	struct neigh_node *neigh_node = NULL;
+	struct neigh_node *router = NULL;
 	struct sk_buff *skb;
 	struct vis_packet *packet;
 
 	packet = (struct vis_packet *)info->skb_packet->data;
 
-	rcu_read_lock();
 	orig_node = orig_hash_find(bat_priv, packet->target_orig);
-
 	if (!orig_node)
-		goto unlock;
-
-	neigh_node = orig_node->router;
+		goto out;
 
-	if (!neigh_node)
-		goto unlock;
-
-	if (!atomic_inc_not_zero(&neigh_node->refcount)) {
-		neigh_node = NULL;
-		goto unlock;
-	}
-
-	rcu_read_unlock();
+	router = orig_node_get_router(orig_node);
+	if (!router)
+		goto out;
 
 	skb = skb_clone(info->skb_packet, GFP_ATOMIC);
 	if (skb)
-		send_skb_packet(skb, neigh_node->if_incoming,
-				neigh_node->addr);
+		send_skb_packet(skb, router->if_incoming, router->addr);
 
-	goto out;
-
-unlock:
-	rcu_read_unlock();
 out:
-	if (neigh_node)
-		neigh_node_free_ref(neigh_node);
+	if (router)
+		neigh_node_free_ref(router);
 	if (orig_node)
 		orig_node_free_ref(orig_node);
-	return;
 }
 
 /* only send one vis packet. called from send_vis_packets() */
 static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info)
 {
+	struct hard_iface *primary_if;
 	struct vis_packet *packet;
 
+	primary_if = primary_if_get_selected(bat_priv);
+	if (!primary_if)
+		goto out;
+
 	packet = (struct vis_packet *)info->skb_packet->data;
 	if (packet->ttl < 2) {
 		pr_debug("Error - can't send vis packet: ttl exceeded\n");
-		return;
+		goto out;
 	}
 
-	memcpy(packet->sender_orig, bat_priv->primary_if->net_dev->dev_addr,
-	       ETH_ALEN);
+	memcpy(packet->sender_orig, primary_if->net_dev->dev_addr, ETH_ALEN);
 	packet->ttl--;
 
 	if (is_broadcast_ether_addr(packet->target_orig))
@@ -833,6 +844,10 @@ static void send_vis_packet(struct bat_priv *bat_priv, struct vis_info *info)
 	else
 		unicast_vis_packet(bat_priv, info);
 	packet->ttl++; /* restore TTL */
+
+out:
+	if (primary_if)
+		hardif_free_ref(primary_if);
 }
 
 /* called from timer; send (and maybe generate) vis packet. */
@@ -859,8 +874,7 @@ static void send_vis_packets(struct work_struct *work)
 		kref_get(&info->refcount);
 		spin_unlock_bh(&bat_priv->vis_hash_lock);
 
-		if (bat_priv->primary_if)
-			send_vis_packet(bat_priv, info);
+		send_vis_packet(bat_priv, info);
 
 		spin_lock_bh(&bat_priv->vis_hash_lock);
 		send_list_del(info);