#define MIN(x, y) ((x) < (y) ? (x) : (y))
+/* protect update critical side of if_list - but not the content */
+static DEFINE_SPINLOCK(if_list_lock);
+
struct batman_if *get_batman_if_by_netdev(struct net_device *net_dev)
{
struct batman_if *batman_if;
INIT_LIST_HEAD(&batman_if->list);
check_known_mac_addr(batman_if->net_dev->dev_addr);
+
+ spin_lock(&if_list_lock);
list_add_tail_rcu(&batman_if->list, &if_list);
+ spin_unlock(&if_list_lock);
+
return batman_if;
free_if:
return;
batman_if->if_status = IF_TO_BE_REMOVED;
+
+ /* caller must take if_list_lock */
list_del_rcu(&batman_if->list);
sysfs_del_hardif(&batman_if->hardif_obj);
dev_put(batman_if->net_dev);
{
struct batman_if *batman_if, *batman_if_tmp;
+ rtnl_lock();
+ spin_lock(&if_list_lock);
list_for_each_entry_safe(batman_if, batman_if_tmp, &if_list, list) {
- rtnl_lock();
hardif_remove_interface(batman_if);
- rtnl_unlock();
}
+ spin_unlock(&if_list_lock);
+ rtnl_unlock();
}
static int hard_if_event(struct notifier_block *this,
hardif_deactivate_interface(batman_if);
break;
case NETDEV_UNREGISTER:
+ spin_lock(&if_list_lock);
hardif_remove_interface(batman_if);
+ spin_unlock(&if_list_lock);
break;
case NETDEV_CHANGEMTU:
if (batman_if->soft_iface)