The following commit has been merged in the master branch: commit d1829fa0c380ccf48a7b96795a6d4a01698d02a6 Author: Daniele Furlan daniele.furlan@gmail.com Date: Tue Jun 7 00:45:55 2011 +0200

batman-adv: accept delayed rebroadcasts to avoid bogus routing under heavy load

When a link is saturated (re)broadcasts of OGMs are delayed. Under heavy load this delay may exceed the orig interval which leads to OGMs being dropped (the code would only accept an OGM rebroadcast if it arrived before the next OGM was broadcasted). With this patch batman-adv will also accept delayed OGMs in order to avoid a bogus influence on the routing metric.

Signed-off-by: Daniele Furlan daniele.furlan@gmail.com Signed-off-by: Sven Eckelmann sven@narfation.org

diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 368ceeb..934f1f2 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -698,17 +698,16 @@ void receive_bat_packet(const struct ethhdr *ethhdr,

/* neighbor has to indicate direct link and it has to * come via the corresponding interface */ - /* if received seqno equals last send seqno save new - * seqno for bidirectional check */ + /* save packet seqno for bidirectional check */ if (has_directlink_flag && compare_eth(if_incoming->net_dev->dev_addr, - batman_packet->orig) && - (batman_packet->seqno - if_incoming_seqno + 2 == 0)) { + batman_packet->orig)) { offset = if_incoming->if_num * NUM_WORDS;

spin_lock_bh(&orig_neigh_node->ogm_cnt_lock); word = &(orig_neigh_node->bcast_own[offset]); - bit_mark(word, 0); + bit_mark(word, + if_incoming_seqno - batman_packet->seqno - 2); orig_neigh_node->bcast_own_sum[if_incoming->if_num] = bit_packet_count(word); spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock);