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Date: Sat, 10 May 2014 17:35:10 +0200 From: Antonio Quartulli <antonio@...hcoding.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, b.a.t.m.a.n@...ts.open-mesh.org, Simon Wunderlich <simon@...n-mesh.com>, Marek Lindner <mareklindner@...mailbox.ch>, Antonio Quartulli <antonio@...hcoding.com> Subject: [PATCH 4/4] batman-adv: fix removing neigh_ifinfo From: Simon Wunderlich <simon@...n-mesh.com> 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@...n-mesh.com> Signed-off-by: Simon Wunderlich <simon@...n-mesh.com> Signed-off-by: Marek Lindner <mareklindner@...mailbox.ch> Signed-off-by: Antonio Quartulli <antonio@...hcoding.com> --- net/batman-adv/originator.c | 46 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) diff --git a/net/batman-adv/originator.c b/net/batman-adv/originator.c index 8104c3c..427c07d 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_node: 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 neccesary if not the whole neighbor is to be deleted, + * but some interface has been removed. + */ + batadv_purge_neigh_ifinfo(bat_priv, neigh_node); } } -- 1.8.5.5 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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