diff options
Diffstat (limited to 'net/atm/common.c')
| -rw-r--r-- | net/atm/common.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/net/atm/common.c b/net/atm/common.c index b43feb1a3995..940404a73b3d 100644 --- a/net/atm/common.c +++ b/net/atm/common.c @@ -37,6 +37,8 @@ EXPORT_SYMBOL(vcc_hash); 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); @@ -212,6 +214,22 @@ void vcc_release_async(struct atm_vcc *vcc, int reply) } 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) { @@ -781,6 +799,18 @@ int vcc_getsockopt(struct socket *sock, int level, int optname, 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; |