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authorLinus Lüssing <linus.luessing@c0d3.blue>2014-10-30 05:40:47 +0100
committerAntonio Quartulli <antonio@meshcoding.com>2015-01-06 11:06:04 +0100
commita5164886b0bdadd662f9715a7541432c4d1a0d99 (patch)
treed3c4c5bbaec4cf190551490635fadc0f8f565b9f /net
parentbatman-adv: fix counter for multicast supporting nodes (diff)
downloadlinux-a5164886b0bdadd662f9715a7541432c4d1a0d99.tar.xz
linux-a5164886b0bdadd662f9715a7541432c4d1a0d99.zip
batman-adv: fix multicast counter when purging originators
When purging an orig_node we should only decrease counter tracking the number of nodes without multicast optimizations support if it was increased through this orig_node before. A not yet quite initialized orig_node (meaning it did not have its turn in the mcast-tvlv handler so far) which gets purged would not adhere to this and will lead to a counter imbalance. Fixing this by adding a check whether the orig_node is mcast-initalized before decreasing the counter in the mcast-orig_node-purging routine. Introduced by 60432d756cf06e597ef9da511402dd059b112447 ("batman-adv: Announce new capability via multicast TVLV") Reported-by: Tobias Hachmer <tobias@hachmer.de> Signed-off-by: Linus Lüssing <linus.luessing@c0d3.blue> Signed-off-by: Marek Lindner <mareklindner@neomailbox.ch> Signed-off-by: Antonio Quartulli <antonio@meshcoding.com>
Diffstat (limited to 'net')
-rw-r--r--net/batman-adv/multicast.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/net/batman-adv/multicast.c b/net/batman-adv/multicast.c
index d3503fbfec93..b24e4bb64fb5 100644
--- a/net/batman-adv/multicast.c
+++ b/net/batman-adv/multicast.c
@@ -740,7 +740,8 @@ void batadv_mcast_purge_orig(struct batadv_orig_node *orig)
{
struct batadv_priv *bat_priv = orig->bat_priv;
- if (!(orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST))
+ if (!(orig->capabilities & BATADV_ORIG_CAPA_HAS_MCAST) &&
+ orig->capa_initialized & BATADV_ORIG_CAPA_HAS_MCAST)
atomic_dec(&bat_priv->mcast.num_disabled);
batadv_mcast_want_unsnoop_update(bat_priv, orig, BATADV_NO_FLAGS);