[5/5] batman-adv: Protect global TQ window with a spinlock
Commit Message
Signed-off-by: Linus Lüssing <linus.luessing@web.de>
---
originator.c | 1 +
routing.c | 4 ++++
types.h | 1 +
3 files changed, 6 insertions(+), 0 deletions(-)
@@ -102,6 +102,7 @@ struct neigh_node *create_neighbor(struct orig_node *orig_node,
INIT_HLIST_NODE(&neigh_node->list);
INIT_LIST_HEAD(&neigh_node->bonding_list);
+ spin_lock_init(&neigh_node->tq_lock);
memcpy(neigh_node->addr, neigh, ETH_ALEN);
neigh_node->orig_node = orig_neigh_node;
@@ -408,10 +408,12 @@ static void update_orig(struct bat_priv *bat_priv,
if (is_duplicate)
continue;
+ spin_lock_bh(&tmp_neigh_node->tq_lock);
ring_buffer_set(tmp_neigh_node->tq_recv,
&tmp_neigh_node->tq_index, 0);
tmp_neigh_node->tq_avg =
ring_buffer_avg(tmp_neigh_node->tq_recv);
+ spin_unlock_bh(&tmp_neigh_node->tq_lock);
}
if (!neigh_node) {
@@ -436,10 +438,12 @@ static void update_orig(struct bat_priv *bat_priv,
orig_node->flags = batman_packet->flags;
neigh_node->last_valid = jiffies;
+ spin_lock_bh(&neigh_node->tq_lock);
ring_buffer_set(neigh_node->tq_recv,
&neigh_node->tq_index,
batman_packet->tq);
neigh_node->tq_avg = ring_buffer_avg(neigh_node->tq_recv);
+ spin_unlock_bh(&neigh_node->tq_lock);
if (!is_duplicate) {
orig_node->last_ttl = batman_packet->ttl;
@@ -125,6 +125,7 @@ struct neigh_node {
struct rcu_head rcu;
struct orig_node *orig_node;
struct hard_iface *if_incoming;
+ spinlock_t tq_lock; /* protects: tq_recv, tq_index */
};