void inet_add_protocol(struct inet_protocol *prot)
{
unsigned char hash;
struct inet_protocol *p2;
hash = prot->protocol & (MAX_INET_PROTOS - 1);
br_write_lock_bh(BR_NETPROTO_LOCK);
prot ->next = inet_protos[hash];
inet_protos[hash] = prot;
prot->copy = 0;
/*
* Set the copy bit if we need to.
*/
p2 = (struct inet_protocol *) prot->next;
while (p2) {
if (p2->protocol == prot->protocol) {
prot->copy = 1;
break;
}
p2 = (struct inet_protocol *) p2->next;
}
br_write_unlock_bh(BR_NETPROTO_LOCK);
}
static void del_ifs(struct net_bridge *br)
{
br_write_lock_bh(BR_NETPROTO_LOCK);
write_lock(&br->lock);
while (br->port_list != NULL)
__br_del_if(br, br->port_list->dev);
write_unlock(&br->lock);
br_write_unlock_bh(BR_NETPROTO_LOCK);
}
int inet_del_protocol(struct inet_protocol *prot)
{
struct inet_protocol *p;
struct inet_protocol *lp = NULL;
unsigned char hash;
hash = prot->protocol & (MAX_INET_PROTOS - 1);
br_write_lock_bh(BR_NETPROTO_LOCK);
if (prot == inet_protos[hash]) {
inet_protos[hash] = (struct inet_protocol *) inet_protos[hash]->next;
br_write_unlock_bh(BR_NETPROTO_LOCK);
return 0;
}
p = (struct inet_protocol *) inet_protos[hash];
if (p != NULL && p->protocol == prot->protocol)
lp = p;
while (p) {
/*
* We have to worry if the protocol being deleted is
* the last one on the list, then we may need to reset
* someone's copied bit.
*/
if (p->next && p->next == prot) {
/*
* if we are the last one with this protocol and
* there is a previous one, reset its copy bit.
*/
if (prot->copy == 0 && lp != NULL)
lp->copy = 0;
p->next = prot->next;
br_write_unlock_bh(BR_NETPROTO_LOCK);
return 0;
}
if (p->next != NULL && p->next->protocol == prot->protocol)
lp = p->next;
p = (struct inet_protocol *) p->next;
}
br_write_unlock_bh(BR_NETPROTO_LOCK);
return -1;
}
/* Noone stores the protocol anywhere; simply delete it. */
void ip_nat_protocol_unregister(struct ip_nat_protocol *proto)
{
WRITE_LOCK(&ip_nat_lock);
LIST_DELETE(&protos, proto);
WRITE_UNLOCK(&ip_nat_lock);
/* Someone could be still looking at the proto in a bh. */
br_write_lock_bh(BR_NETPROTO_LOCK);
br_write_unlock_bh(BR_NETPROTO_LOCK);
MOD_DEC_USE_COUNT;
}
int br_del_if(struct net_bridge *br, struct net_device *dev)
{
int retval;
br_write_lock_bh(BR_NETPROTO_LOCK);
write_lock(&br->lock);
retval = __br_del_if(br, dev);
br_stp_recalculate_bridge_id(br);
write_unlock(&br->lock);
br_write_unlock_bh(BR_NETPROTO_LOCK);
return retval;
}
static void __exit br_deinit(void)
{
unregister_netdevice_notifier(&br_device_notifier);
br_call_ioctl_atomic(__br_clear_ioctl_hook);
br_write_lock_bh(BR_NETPROTO_LOCK);
br_handle_frame_hook = NULL;
br_write_unlock_bh(BR_NETPROTO_LOCK);
#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
br_fdb_get_hook = NULL;
br_fdb_put_hook = NULL;
#endif
}
static void __exit br_deinit(void)
{
#if defined(CONFIG_BRIDGE_NF_EBTABLES) || defined(CONFIG_BRIDGE_NF_EBTABLES_MODULE)
br_netfilter_fini();
#endif
unregister_netdevice_notifier(&br_device_notifier);
rtnl_lock();
br_ioctl_hook = NULL;
rtnl_unlock();
br_write_lock_bh(BR_NETPROTO_LOCK);
br_handle_frame_hook = NULL;
br_write_unlock_bh(BR_NETPROTO_LOCK);
#if defined(CONFIG_ATM_LANE) || defined(CONFIG_ATM_LANE_MODULE)
br_fdb_get_hook = NULL;
br_fdb_put_hook = NULL;
#endif
}