int br_add_if(struct net_bridge *br, struct net_device *dev)
{
struct net_bridge_port *p;
if (dev->br_port != NULL)
return -EBUSY;
if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER)
return -EINVAL;
dev_hold(dev);
write_lock_bh(&br->lock);
if ((p = new_nbp(br, dev)) == NULL) {
write_unlock_bh(&br->lock);
dev_put(dev);
return -EXFULL;
}
dev_set_promiscuity(dev, 1);
br_stp_recalculate_bridge_id(br);
br_fdb_insert(br, p, dev->dev_addr, 1);
if ((br->dev.flags & IFF_UP) && (dev->flags & IFF_UP))
br_stp_enable_port(p);
write_unlock_bh(&br->lock);
return 0;
}
/*
* Handle changes in state of network devices enslaved to a bridge.
*
* Note: don't care about up/down if bridge itself is down, because
* port state is checked when bridge is brought up.
*/
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
struct net_bridge_port *p = dev->br_port;
struct net_bridge *br;
/* not a port of a bridge */
if (p == NULL)
return NOTIFY_DONE;
br = p->br;
switch (event) {
case NETDEV_CHANGEMTU:
dev_set_mtu(br->dev, br_min_mtu(br));
break;
case NETDEV_CHANGEADDR:
spin_lock_bh(&br->lock);
br_fdb_changeaddr(p, dev->dev_addr);
br_ifinfo_notify(RTM_NEWLINK, p);
br_stp_recalculate_bridge_id(br);
spin_unlock_bh(&br->lock);
break;
case NETDEV_CHANGE:
br_port_carrier_check(p);
break;
case NETDEV_FEAT_CHANGE:
spin_lock_bh(&br->lock);
if (netif_running(br->dev))
br_features_recompute(br);
spin_unlock_bh(&br->lock);
break;
case NETDEV_DOWN:
spin_lock_bh(&br->lock);
if (br->dev->flags & IFF_UP)
br_stp_disable_port(p);
spin_unlock_bh(&br->lock);
break;
case NETDEV_UP:
spin_lock_bh(&br->lock);
if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP))
br_stp_enable_port(p);
spin_unlock_bh(&br->lock);
break;
case NETDEV_UNREGISTER:
br_del_if(br, dev);
break;
}
return NOTIFY_DONE;
}
int br_del_if(struct net_bridge *br, struct net_device *dev)
{
int retval;
write_lock_bh(&br->lock);
retval = __br_del_if(br, dev);
br_stp_recalculate_bridge_id(br);
write_unlock_bh(&br->lock);
return retval;
}
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev;
struct net_bridge_port *p;
dev = ptr;
p = dev->br_port;
if (p == NULL)
return NOTIFY_DONE;
switch (event)
{
case NETDEV_CHANGEADDR:
read_lock(&p->br->lock);
br_fdb_changeaddr(p, dev->dev_addr);
br_stp_recalculate_bridge_id(p->br);
read_unlock(&p->br->lock);
break;
case NETDEV_GOING_DOWN:
/* extend the protocol to send some kind of notification? */
break;
case NETDEV_DOWN:
if (p->br->dev.flags & IFF_UP) {
read_lock(&p->br->lock);
#if 0
#ifdef STP_DISABLE_ETH
//Chris: stp+mesh
p->disable_by_mesh = 0;
#endif
#endif
br_stp_disable_port(dev->br_port);
read_unlock(&p->br->lock);
}
break;
case NETDEV_UP:
if (p->br->dev.flags & IFF_UP) {
read_lock(&p->br->lock);
br_stp_enable_port(dev->br_port);
read_unlock(&p->br->lock);
}
break;
case NETDEV_UNREGISTER:
br_del_if(dev->br_port->br, dev);
break;
}
return NOTIFY_DONE;
}
int br_add_if(struct net_bridge *br, struct net_device *dev)
{
struct net_bridge_port *p;
if (dev->br_port != NULL)
return -EBUSY;
#if 0
if (dev->flags & IFF_LOOPBACK || dev->type != ARPHRD_ETHER)
return -EINVAL;
#endif
if (dev->hard_start_xmit == br_dev_xmit)
return -ELOOP;
if (!is_valid_ether_addr(dev->dev_addr))
return -EADDRNOTAVAIL;
dev_hold(dev);
write_lock_bh(&br->lock);
if ((p = new_nbp(br, dev)) == NULL) {
write_unlock_bh(&br->lock);
dev_put(dev);
return -EXFULL;
}
dev_set_promiscuity(dev, 1);
br_stp_recalculate_bridge_id(br);
br_fdb_insert(br, p, dev->dev_addr, 1);
if ((br->dev.flags & IFF_UP) && (dev->flags & IFF_UP))
br_stp_enable_port(p);
write_unlock_bh(&br->lock);
return 0;
}
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
struct net_bridge_port *p = dev->br_port;
struct net_bridge *br;
int err;
/* not a port of a bridge */
if (p == NULL)
return NOTIFY_DONE;
br = p->br;
switch (event) {
case NETDEV_CHANGEMTU:
dev_set_mtu(br->dev, br_min_mtu(br));
break;
case NETDEV_CHANGEADDR:
spin_lock_bh(&br->lock);
br_fdb_changeaddr(p, dev->dev_addr);
br_stp_recalculate_bridge_id(br);
spin_unlock_bh(&br->lock);
break;
case NETDEV_CHANGE:
br_port_carrier_check(p);
break;
case NETDEV_FEAT_CHANGE:
spin_lock_bh(&br->lock);
if (netif_running(br->dev))
br_features_recompute(br);
spin_unlock_bh(&br->lock);
break;
case NETDEV_DOWN:
spin_lock_bh(&br->lock);
if (br->dev->flags & IFF_UP)
br_stp_disable_port(p);
spin_unlock_bh(&br->lock);
break;
case NETDEV_UP:
if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP)) {
spin_lock_bh(&br->lock);
br_stp_enable_port(p);
spin_unlock_bh(&br->lock);
}
break;
case NETDEV_UNREGISTER:
br_del_if(br, dev);
break;
case NETDEV_CHANGENAME:
err = br_sysfs_renameif(p);
if (err)
return notifier_from_errno(err);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
}
/* Events that may cause spanning tree to refresh */
if (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
event == NETDEV_CHANGE || event == NETDEV_DOWN)
br_ifinfo_notify(RTM_NEWLINK, p);
return NOTIFY_DONE;
}
/*
* Handle changes in state of network devices enslaved to a bridge.
*
* Note: don't care about up/down if bridge itself is down, because
* port state is checked when bridge is brought up.
*/
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct net_bridge_port *p;
struct net_bridge *br;
bool changed_addr;
int err;
/* register of bridge completed, add sysfs entries */
if ((dev->priv_flags & IFF_EBRIDGE) && event == NETDEV_REGISTER) {
br_sysfs_addbr(dev);
return NOTIFY_DONE;
}
/* not a port of a bridge */
p = br_port_get_rtnl(dev);
if (!p)
return NOTIFY_DONE;
br = p->br;
switch (event) {
case NETDEV_CHANGEMTU:
dev_set_mtu(br->dev, br_min_mtu(br));
break;
case NETDEV_CHANGEADDR:
spin_lock_bh(&br->lock);
br_fdb_changeaddr(p, dev->dev_addr);
changed_addr = br_stp_recalculate_bridge_id(br);
spin_unlock_bh(&br->lock);
if (changed_addr)
call_netdevice_notifiers(NETDEV_CHANGEADDR, br->dev);
break;
case NETDEV_CHANGE:
br_port_carrier_check(p);
break;
case NETDEV_FEAT_CHANGE:
netdev_update_features(br->dev);
break;
case NETDEV_DOWN:
spin_lock_bh(&br->lock);
if (br->dev->flags & IFF_UP)
br_stp_disable_port(p);
spin_unlock_bh(&br->lock);
break;
case NETDEV_UP:
if (netif_running(br->dev) && netif_oper_up(dev)) {
spin_lock_bh(&br->lock);
br_stp_enable_port(p);
spin_unlock_bh(&br->lock);
}
break;
case NETDEV_UNREGISTER:
br_del_if(br, dev);
break;
case NETDEV_CHANGENAME:
err = br_sysfs_renameif(p);
if (err)
return notifier_from_errno(err);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
case NETDEV_RESEND_IGMP:
/* Propagate to master device */
call_netdevice_notifiers(event, br->dev);
break;
}
/* Events that may cause spanning tree to refresh */
if (event == NETDEV_CHANGEADDR || event == NETDEV_UP ||
event == NETDEV_CHANGE || event == NETDEV_DOWN)
br_ifinfo_notify(RTM_NEWLINK, p);
return NOTIFY_DONE;
}
/*
* Handle changes in state of network devices enslaved to a bridge.
*
* Note: don't care about up/down if bridge itself is down, because
* port state is checked when bridge is brought up.
*/
static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
{
struct net_device *dev = ptr;
struct net_bridge_port *p = dev->br_port;
struct net_bridge *br;
/* not a port of a bridge */
if (p == NULL)
return NOTIFY_DONE;
br = p->br;
spin_lock_bh(&br->lock);
switch (event) {
case NETDEV_CHANGEMTU:
dev_set_mtu(br->dev, br_min_mtu(br));
break;
case NETDEV_CHANGEADDR:
br_fdb_changeaddr(p, dev->dev_addr);
br_stp_recalculate_bridge_id(br);
break;
case NETDEV_CHANGE: /* device is up but carrier changed */
if (!(br->dev->flags & IFF_UP))
break;
if (netif_carrier_ok(dev)) {
if (p->state == BR_STATE_DISABLED)
br_stp_enable_port(p);
} else {
if (p->state != BR_STATE_DISABLED)
br_stp_disable_port(p);
}
break;
case NETDEV_FEAT_CHANGE:
if (br->dev->flags & IFF_UP)
br_features_recompute(br);
/* could do recursive feature change notification
* but who would care??
*/
break;
case NETDEV_DOWN:
if (br->dev->flags & IFF_UP)
br_stp_disable_port(p);
break;
case NETDEV_UP:
if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP))
br_stp_enable_port(p);
break;
case NETDEV_UNREGISTER:
spin_unlock_bh(&br->lock);
br_del_if(br, dev);
goto done;
}
spin_unlock_bh(&br->lock);
done:
return NOTIFY_DONE;
}