leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

batman-adv: protect each hash row with rcu locks

Browse Source 
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>
This commit is contained in:
Marek Lindner
2011-01-19 20:01:40 +00:00
parent a775eb847a
commit fb778ea173
8 changed files with 141 additions and 45 deletions
Download Patch File Download Diff File Expand all files Collapse all files

16
net/batman-adv/routing.c
View File

@@ -52,7 +52,8 @@ void slide_own_bcast_window(struct batman_if *batman_if)
for (i = 0; i < hash->size; i++) {
head = &hash->table[i];
hlist_for_each_entry(bucket, walk, head, hlist) {
rcu_read_lock();
hlist_for_each_entry_rcu(bucket, walk, head, hlist) {
orig_node = bucket->data;
word_index = batman_if->if_num * NUM_WORDS;
word = &(orig_node->bcast_own[word_index]);
@@ -61,6 +62,7 @@ void slide_own_bcast_window(struct batman_if *batman_if)
orig_node->bcast_own_sum[batman_if->if_num] =
bit_packet_count(word);
}
rcu_read_unlock();
}
spin_unlock_bh(&bat_priv->orig_hash_lock);
@@ -873,9 +875,11 @@ static int recv_my_icmp_packet(struct bat_priv *bat_priv,
/* answer echo request (ping) */
/* get routing information */
spin_lock_bh(&bat_priv->orig_hash_lock);
rcu_read_lock();
orig_node = ((struct orig_node *)hash_find(bat_priv->orig_hash,
compare_orig, choose_orig,
icmp_packet->orig));
rcu_read_unlock();
ret = NET_RX_DROP;
if ((orig_node) && (orig_node->router)) {
@@ -931,9 +935,11 @@ static int recv_icmp_ttl_exceeded(struct bat_priv *bat_priv,
/* get routing information */
spin_lock_bh(&bat_priv->orig_hash_lock);
rcu_read_lock();
orig_node = ((struct orig_node *)
hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
icmp_packet->orig));
rcu_read_unlock();
ret = NET_RX_DROP;
if ((orig_node) && (orig_node->router)) {
@@ -1023,9 +1029,11 @@ int recv_icmp_packet(struct sk_buff *skb, struct batman_if *recv_if)
/* get routing information */
spin_lock_bh(&bat_priv->orig_hash_lock);
rcu_read_lock();
orig_node = ((struct orig_node *)
hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
icmp_packet->dst));
rcu_read_unlock();
if ((orig_node) && (orig_node->router)) {
@@ -1094,9 +1102,11 @@ struct neigh_node *find_router(struct bat_priv *bat_priv,
router_orig->orig, ETH_ALEN) == 0) {
primary_orig_node = router_orig;
} else {
rcu_read_lock();
primary_orig_node = hash_find(bat_priv->orig_hash, compare_orig,
choose_orig,
router_orig->primary_addr);
rcu_read_unlock();
if (!primary_orig_node)
return orig_node->router;
@@ -1199,9 +1209,11 @@ int route_unicast_packet(struct sk_buff *skb, struct batman_if *recv_if,
/* get routing information */
spin_lock_bh(&bat_priv->orig_hash_lock);
rcu_read_lock();
orig_node = ((struct orig_node *)
hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
unicast_packet->dest));
rcu_read_unlock();
router = find_router(bat_priv, orig_node, recv_if);
@@ -1345,9 +1357,11 @@ int recv_bcast_packet(struct sk_buff *skb, struct batman_if *recv_if)
return NET_RX_DROP;
spin_lock_bh(&bat_priv->orig_hash_lock);
rcu_read_lock();
orig_node = ((struct orig_node *)
hash_find(bat_priv->orig_hash, compare_orig, choose_orig,
bcast_packet->orig));
rcu_read_unlock();
if (!orig_node) {
spin_unlock_bh(&bat_priv->orig_hash_lock);