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batman-adv: increase refcount in create_neighbor to be consistent

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Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
This commit is contained in:
Marek Lindner 2011-02-18 12:28:11 +00:00
parent 7b36e8eef9
commit 1605d0d60b
2 changed files with 30 additions and 37 deletions
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4
net/batman-adv/originator.c
View File

@ -94,7 +94,9 @@ struct neigh_node *create_neighbor(struct orig_node *orig_node,
memcpy(neigh_node->addr, neigh, ETH_ALEN);
neigh_node->orig_node = orig_neigh_node;
neigh_node->if_incoming = if_incoming;
atomic_set(&neigh_node->refcount, 1);
/* extra reference for return */
atomic_set(&neigh_node->refcount, 2);
spin_lock_bh(&orig_node->neigh_list_lock);
hlist_add_head_rcu(&neigh_node->list, &orig_node->neigh_list);

63
net/batman-adv/routing.c
View File

@ -150,7 +150,7 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
struct batman_if *if_incoming)
{
struct bat_priv *bat_priv = netdev_priv(if_incoming->soft_iface);
struct neigh_node *neigh_node = NULL, *tmp_neigh_node = NULL;
struct neigh_node *neigh_node = NULL, *tmp_neigh_node;
struct hlist_node *node;
unsigned char total_count;
uint8_t orig_eq_count, neigh_rq_count, tq_own;
@ -161,27 +161,27 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_node->neigh_list, list) {
if (compare_eth(tmp_neigh_node->addr,
orig_neigh_node->orig) &&
(tmp_neigh_node->if_incoming == if_incoming))
neigh_node = tmp_neigh_node;
if (!compare_eth(tmp_neigh_node->addr,
orig_neigh_node->orig))
continue;
if (tmp_neigh_node->if_incoming != if_incoming)
continue;
if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
continue;
neigh_node = tmp_neigh_node;
}
rcu_read_unlock();
if (!neigh_node)
neigh_node = create_neighbor(orig_node,
orig_neigh_node,
orig_neigh_node->orig,
if_incoming);
/* create_neighbor failed, return 0 */
if (!neigh_node)
goto unlock;
if (!atomic_inc_not_zero(&neigh_node->refcount)) {
neigh_node = NULL;
goto unlock;
}
rcu_read_unlock();
goto out;
neigh_node->last_valid = jiffies;
} else {
@ -190,27 +190,27 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
hlist_for_each_entry_rcu(tmp_neigh_node, node,
&orig_neigh_node->neigh_list, list) {
if (compare_eth(tmp_neigh_node->addr,
orig_neigh_node->orig) &&
(tmp_neigh_node->if_incoming == if_incoming))
neigh_node = tmp_neigh_node;
if (!compare_eth(tmp_neigh_node->addr,
orig_neigh_node->orig))
continue;
if (tmp_neigh_node->if_incoming != if_incoming)
continue;
if (!atomic_inc_not_zero(&tmp_neigh_node->refcount))
continue;
neigh_node = tmp_neigh_node;
}
rcu_read_unlock();
if (!neigh_node)
neigh_node = create_neighbor(orig_neigh_node,
orig_neigh_node,
orig_neigh_node->orig,
if_incoming);
/* create_neighbor failed, return 0 */
if (!neigh_node)
goto unlock;
if (!atomic_inc_not_zero(&neigh_node->refcount)) {
neigh_node = NULL;
goto unlock;
}
rcu_read_unlock();
goto out;
}
orig_node->last_valid = jiffies;
@ -265,10 +265,6 @@ static int is_bidirectional_neigh(struct orig_node *orig_node,
if (batman_packet->tq >= TQ_TOTAL_BIDRECT_LIMIT)
ret = 1;
goto out;
unlock:
rcu_read_unlock();
out:
if (neigh_node)
neigh_node_free_ref(neigh_node);
@ -423,11 +419,6 @@ static void update_orig(struct bat_priv *bat_priv,
orig_node_free_ref(orig_tmp);
if (!neigh_node)
goto unlock;
if (!atomic_inc_not_zero(&neigh_node->refcount)) {
neigh_node = NULL;
goto unlock;
}
} else
bat_dbg(DBG_BATMAN, bat_priv,
"Updating existing last-hop neighbor of originator\n");