diff options
| author | Marek Lindner <lindner_marek@yahoo.de> | 2011-01-19 23:01:42 +0300 |
|---|---|---|
| committer | Marek Lindner <lindner_marek@yahoo.de> | 2011-03-05 14:50:00 +0300 |
| commit | 2ae2daf6c3f23364862a7d4f2ca79eab041b701b (patch) | |
| tree | 8b4c15f4c7733d9d1d3aa58fd80b6f998b9eca2c /net/batman-adv/routing.c | |
| parent | 16b1aba849eeb45d51a5de731cf103143439ffe1 (diff) | |
| download | linux-2ae2daf6c3f23364862a7d4f2ca79eab041b701b.tar.xz | |
batman-adv: protect ogm counter arrays with spinlock
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
Diffstat (limited to 'net/batman-adv/routing.c')
| -rw-r--r-- | net/batman-adv/routing.c | 27 |
1 files changed, 23 insertions, 4 deletions
diff --git a/net/batman-adv/routing.c b/net/batman-adv/routing.c index 1c31a0e9f90a..7627ebe50c4b 100644 --- a/net/batman-adv/routing.c +++ b/net/batman-adv/routing.c @@ -55,12 +55,14 @@ void slide_own_bcast_window(struct batman_if *batman_if) rcu_read_lock(); hlist_for_each_entry_rcu(bucket, walk, head, hlist) { orig_node = bucket->data; + spin_lock_bh(&orig_node->ogm_cnt_lock); word_index = batman_if->if_num * NUM_WORDS; word = &(orig_node->bcast_own[word_index]); bit_get_packet(bat_priv, word, 1, 0); orig_node->bcast_own_sum[batman_if->if_num] = bit_packet_count(word); + spin_unlock_bh(&orig_node->ogm_cnt_lock); } rcu_read_unlock(); } @@ -278,8 +280,10 @@ static void update_orig(struct bat_priv *bat_priv, char is_duplicate) { struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL; + struct orig_node *orig_node_tmp; struct hlist_node *node; int tmp_hna_buff_len; + uint8_t bcast_own_sum_orig, bcast_own_sum_neigh; bat_dbg(DBG_BATMAN, bat_priv, "update_originator(): " "Searching and updating originator entry of received packet\n"); @@ -351,10 +355,22 @@ static void update_orig(struct bat_priv *bat_priv, /* if the TQ is the same and the link not more symetric we * won't consider it either */ if ((orig_node->router) && - ((neigh_node->tq_avg == orig_node->router->tq_avg) && - (orig_node->router->orig_node->bcast_own_sum[if_incoming->if_num] - >= neigh_node->orig_node->bcast_own_sum[if_incoming->if_num]))) - goto update_hna; + (neigh_node->tq_avg == orig_node->router->tq_avg)) { + orig_node_tmp = orig_node->router->orig_node; + spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); + bcast_own_sum_orig = + orig_node_tmp->bcast_own_sum[if_incoming->if_num]; + spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); + + orig_node_tmp = neigh_node->orig_node; + spin_lock_bh(&orig_node_tmp->ogm_cnt_lock); + bcast_own_sum_neigh = + orig_node_tmp->bcast_own_sum[if_incoming->if_num]; + spin_unlock_bh(&orig_node_tmp->ogm_cnt_lock); + + if (bcast_own_sum_orig >= bcast_own_sum_neigh) + goto update_hna; + } update_routes(bat_priv, orig_node, neigh_node, hna_buff, tmp_hna_buff_len); @@ -705,10 +721,13 @@ void receive_bat_packet(struct ethhdr *ethhdr, batman_packet->orig) && (batman_packet->seqno - if_incoming_seqno + 2 == 0)) { 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); orig_neigh_node->bcast_own_sum[if_incoming->if_num] = bit_packet_count(word); + spin_unlock_bh(&orig_neigh_node->ogm_cnt_lock); } bat_dbg(DBG_BATMAN, bat_priv, "Drop packet: " |