X-Git-Url: https://git.openpandora.org/cgi-bin/gitweb.cgi?p=pandora-kernel.git;a=blobdiff_plain;f=net%2Fbatman-adv%2Ftranslation-table.c;h=d2d85a6cabccdc03484fce88625e74f122edf37e;hp=c7aafc7c5ed4854b2a46f6e37b5386ef937fee8e;hb=16e7b8c95fa6f8e57d9ab73597e31e3396f0c00d;hpb=3c00303206c3a1ccd86579efdc90bc35f140962e

diff --git a/net/batman-adv/translation-table.c b/net/batman-adv/translation-table.c
index c7aafc7c5ed4..d2d85a6cabcc 100644
--- a/net/batman-adv/translation-table.c
+++ b/net/batman-adv/translation-table.c
@@ -245,9 +245,11 @@ void tt_local_add(struct net_device *soft_iface, const uint8_t *addr,
 	if (tt_global_entry) {
 		/* This node is probably going to update its tt table */
 		tt_global_entry->orig_node->tt_poss_change = true;
-		/* The global entry has to be marked as PENDING and has to be
+		/* The global entry has to be marked as ROAMING and has to be
 		 * kept for consistency purpose */
-		tt_global_entry->flags |= TT_CLIENT_PENDING;
+		tt_global_entry->flags |= TT_CLIENT_ROAM;
+		tt_global_entry->roam_at = jiffies;
+
 		send_roam_adv(bat_priv, tt_global_entry->addr,
 			      tt_global_entry->orig_node);
 	}
@@ -694,6 +696,7 @@ void tt_global_del(struct bat_priv *bat_priv,
 		   const char *message, bool roaming)
 {
 	struct tt_global_entry *tt_global_entry = NULL;
+	struct tt_local_entry *tt_local_entry = NULL;
 
 	tt_global_entry = tt_global_hash_find(bat_priv, addr);
 	if (!tt_global_entry)
@@ -701,15 +704,29 @@ void tt_global_del(struct bat_priv *bat_priv,
 
 	if (tt_global_entry->orig_node == orig_node) {
 		if (roaming) {
-			tt_global_entry->flags |= TT_CLIENT_ROAM;
-			tt_global_entry->roam_at = jiffies;
-			goto out;
+			/* if we are deleting a global entry due to a roam
+			 * event, there are two possibilities:
+			 * 1) the client roamed from node A to node B => we mark
+			 *    it with TT_CLIENT_ROAM, we start a timer and we
+			 *    wait for node B to claim it. In case of timeout
+			 *    the entry is purged.
+			 * 2) the client roamed to us => we can directly delete
+			 *    the global entry, since it is useless now. */
+			tt_local_entry = tt_local_hash_find(bat_priv,
+							tt_global_entry->addr);
+			if (!tt_local_entry) {
+				tt_global_entry->flags |= TT_CLIENT_ROAM;
+				tt_global_entry->roam_at = jiffies;
+				goto out;
+			}
 		}
 		_tt_global_del(bat_priv, tt_global_entry, message);
 	}
 out:
 	if (tt_global_entry)
 		tt_global_entry_free_ref(tt_global_entry);
+	if (tt_local_entry)
+		tt_local_entry_free_ref(tt_local_entry);
 }
 
 void tt_global_del_orig(struct bat_priv *bat_priv,
@@ -935,6 +952,29 @@ uint16_t tt_local_crc(struct bat_priv *bat_priv)
 	return total;
 }
 
+/**
+ * batadv_tt_req_node_release - free tt_req node entry
+ * @ref: kref pointer of the tt req_node entry
+ */
+static void batadv_tt_req_node_release(struct kref *ref)
+{
+	struct tt_req_node *tt_req_node;
+
+	tt_req_node = container_of(ref, struct tt_req_node, refcount);
+
+	kfree(tt_req_node);
+}
+
+/**
+ * batadv_tt_req_node_put - decrement the tt_req_node refcounter and
+ *  possibly release it
+ * @tt_req_node: tt_req_node to be free'd
+ */
+static void batadv_tt_req_node_put(struct tt_req_node *tt_req_node)
+{
+	kref_put(&tt_req_node->refcount, batadv_tt_req_node_release);
+}
+
 static void tt_req_list_free(struct bat_priv *bat_priv)
 {
 	struct tt_req_node *node, *safe;
@@ -943,7 +983,7 @@ static void tt_req_list_free(struct bat_priv *bat_priv)
 
 	list_for_each_entry_safe(node, safe, &bat_priv->tt_req_list, list) {
 		list_del(&node->list);
-		kfree(node);
+		batadv_tt_req_node_put(node);
 	}
 
 	spin_unlock_bh(&bat_priv->tt_req_list_lock);
@@ -978,7 +1018,7 @@ static void tt_req_purge(struct bat_priv *bat_priv)
 		if (is_out_of_time(node->issued_at,
 		    TT_REQUEST_TIMEOUT * 1000)) {
 			list_del(&node->list);
-			kfree(node);
+			batadv_tt_req_node_put(node);
 		}
 	}
 	spin_unlock_bh(&bat_priv->tt_req_list_lock);
@@ -1003,9 +1043,11 @@ static struct tt_req_node *new_tt_req_node(struct bat_priv *bat_priv,
 	if (!tt_req_node)
 		goto unlock;
 
+	kref_init(&tt_req_node->refcount);
 	memcpy(tt_req_node->addr, orig_node->orig, ETH_ALEN);
 	tt_req_node->issued_at = jiffies;
 
+	kref_get(&tt_req_node->refcount);
 	list_add(&tt_req_node->list, &bat_priv->tt_req_list);
 unlock:
 	spin_unlock_bh(&bat_priv->tt_req_list_lock);
@@ -1157,12 +1199,19 @@ out:
 		hardif_free_ref(primary_if);
 	if (ret)
 		kfree_skb(skb);
+
 	if (ret && tt_req_node) {
 		spin_lock_bh(&bat_priv->tt_req_list_lock);
-		list_del(&tt_req_node->list);
+		if (!list_empty(&tt_req_node->list)) {
+			list_del(&tt_req_node->list);
+			batadv_tt_req_node_put(tt_req_node);
+		}
 		spin_unlock_bh(&bat_priv->tt_req_list_lock);
-		kfree(tt_req_node);
 	}
+
+	if (tt_req_node)
+		batadv_tt_req_node_put(tt_req_node);
+
 	return ret;
 }
 
@@ -1535,7 +1584,7 @@ void handle_tt_response(struct bat_priv *bat_priv,
 		if (!compare_eth(node->addr, tt_response->src))
 			continue;
 		list_del(&node->list);
-		kfree(node);
+		batadv_tt_req_node_put(node);
 	}
 	spin_unlock_bh(&bat_priv->tt_req_list_lock);
 
@@ -1799,10 +1848,10 @@ bool is_ap_isolated(struct bat_priv *bat_priv, uint8_t *src, uint8_t *dst)
 {
 	struct tt_local_entry *tt_local_entry = NULL;
 	struct tt_global_entry *tt_global_entry = NULL;
-	bool ret = true;
+	bool ret = false;
 
 	if (!atomic_read(&bat_priv->ap_isolation))
-		return false;
+		goto out;
 
 	tt_local_entry = tt_local_hash_find(bat_priv, dst);
 	if (!tt_local_entry)
@@ -1812,10 +1861,10 @@ bool is_ap_isolated(struct bat_priv *bat_priv, uint8_t *src, uint8_t *dst)
 	if (!tt_global_entry)
 		goto out;
 
-	if (_is_ap_isolated(tt_local_entry, tt_global_entry))
+	if (!_is_ap_isolated(tt_local_entry, tt_global_entry))
 		goto out;
 
-	ret = false;
+	ret = true;
 
 out:
 	if (tt_global_entry)