DEFINE_RWLOCK(vcc_sklist_lock);
EXPORT_SYMBOL(vcc_sklist_lock);
+static ATOMIC_NOTIFIER_HEAD(atm_dev_notify_chain);
+
static void __vcc_insert_socket(struct sock *sk)
{
struct atm_vcc *vcc = atm_sk(sk);
}
EXPORT_SYMBOL(vcc_release_async);
+void atm_dev_signal_change(struct atm_dev *dev, char signal)
+{
+ pr_debug("%s signal=%d dev=%p number=%d dev->signal=%d\n",
+ __func__, signal, dev, dev->number, dev->signal);
+
+ /* atm driver sending invalid signal */
+ WARN_ON(signal < ATM_PHY_SIG_LOST || signal > ATM_PHY_SIG_FOUND);
+
+ if (dev->signal == signal)
+ return; /* no change */
+
+ dev->signal = signal;
+
+ atomic_notifier_call_chain(&atm_dev_notify_chain, signal, dev);
+}
+EXPORT_SYMBOL(atm_dev_signal_change);
void atm_dev_release_vccs(struct atm_dev *dev)
{
return vcc->dev->ops->getsockopt(vcc, level, optname, optval, len);
}
+int register_atmdevice_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&atm_dev_notify_chain, nb);
+}
+EXPORT_SYMBOL_GPL(register_atmdevice_notifier);
+
+void unregister_atmdevice_notifier(struct notifier_block *nb)
+{
+ atomic_notifier_chain_unregister(&atm_dev_notify_chain, nb);
+}
+EXPORT_SYMBOL_GPL(unregister_atmdevice_notifier);
+
static int __init atm_init(void)
{
int error;