[linux-next] LinuxNextTracking branch, master, updated. next-20140514

batman at open-mesh.org batman at open-mesh.org
Thu May 15 00:19:47 CEST 2014


The following commit has been merged in the master branch:
commit 709de13f0c532fe9c468c094aff069a725ed57fe
Author: Simon Wunderlich <simon at open-mesh.com>
Date:   Wed Mar 26 15:46:24 2014 +0100

    batman-adv: fix removing neigh_ifinfo
    
    When an interface is removed separately, all neighbors need to be
    checked if they have a neigh_ifinfo structure for that particular
    interface. If that is the case, remove that ifinfo so any references to
    a hard interface can be freed.
    
    This is a regression introduced by
    89652331c00f43574515059ecbf262d26d885717
    ("batman-adv: split tq information in neigh_node struct")
    
    Reported-by: Antonio Quartulli <antonio at open-mesh.com>
    Signed-off-by: Simon Wunderlich <simon at open-mesh.com>
    Signed-off-by: Marek Lindner <mareklindner at neomailbox.ch>
    Signed-off-by: Antonio Quartulli <antonio at meshcoding.com>

diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c
index 8104c3c..1785da3 100644
--- a/net/batman-adv/originator.c
+++ b/net/batman-adv/originator.c
@@ -707,6 +707,47 @@ free_orig_node:
 }
 
 /**
+ * batadv_purge_neigh_ifinfo - purge obsolete ifinfo entries from neighbor
+ * @bat_priv: the bat priv with all the soft interface information
+ * @neigh: orig node which is to be checked
+ */
+static void
+batadv_purge_neigh_ifinfo(struct batadv_priv *bat_priv,
+			  struct batadv_neigh_node *neigh)
+{
+	struct batadv_neigh_ifinfo *neigh_ifinfo;
+	struct batadv_hard_iface *if_outgoing;
+	struct hlist_node *node_tmp;
+
+	spin_lock_bh(&neigh->ifinfo_lock);
+
+	/* for all ifinfo objects for this neighinator */
+	hlist_for_each_entry_safe(neigh_ifinfo, node_tmp,
+				  &neigh->ifinfo_list, list) {
+		if_outgoing = neigh_ifinfo->if_outgoing;
+
+		/* always keep the default interface */
+		if (if_outgoing == BATADV_IF_DEFAULT)
+			continue;
+
+		/* don't purge if the interface is not (going) down */
+		if ((if_outgoing->if_status != BATADV_IF_INACTIVE) &&
+		    (if_outgoing->if_status != BATADV_IF_NOT_IN_USE) &&
+		    (if_outgoing->if_status != BATADV_IF_TO_BE_REMOVED))
+			continue;
+
+		batadv_dbg(BATADV_DBG_BATMAN, bat_priv,
+			   "neighbor/ifinfo purge: neighbor %pM, iface: %s\n",
+			   neigh->addr, if_outgoing->net_dev->name);
+
+		hlist_del_rcu(&neigh_ifinfo->list);
+		batadv_neigh_ifinfo_free_ref(neigh_ifinfo);
+	}
+
+	spin_unlock_bh(&neigh->ifinfo_lock);
+}
+
+/**
  * batadv_purge_orig_ifinfo - purge obsolete ifinfo entries from originator
  * @bat_priv: the bat priv with all the soft interface information
  * @orig_node: orig node which is to be checked
@@ -805,6 +846,11 @@ batadv_purge_orig_neighbors(struct batadv_priv *bat_priv,
 
 			hlist_del_rcu(&neigh_node->list);
 			batadv_neigh_node_free_ref(neigh_node);
+		} else {
+			/* only necessary if not the whole neighbor is to be
+			 * deleted, but some interface has been removed.
+			 */
+			batadv_purge_neigh_ifinfo(bat_priv, neigh_node);
 		}
 	}
 

-- 
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