4433f420e5
Speed of a interface may not be available until carrier is detected in the case of autonegotiation. To get the correct value we need to recheck speed after carrier event. But the check needs to be done in a context that is similar to normal ethtool interface (can sleep). Also, delay check for 1ms to try avoid any carrier bounce transitions. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: David S. Miller <davem@davemloft.net>
88 lines
2 KiB
C
88 lines
2 KiB
C
/*
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* Device event handling
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* Linux ethernet bridge
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*
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* Authors:
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* Lennert Buytenhek <buytenh@gnu.org>
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*
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* $Id: br_notify.c,v 1.2 2000/02/21 15:51:34 davem Exp $
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/kernel.h>
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#include "br_private.h"
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static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr);
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struct notifier_block br_device_notifier = {
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.notifier_call = br_device_event
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};
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/*
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* Handle changes in state of network devices enslaved to a bridge.
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*
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* Note: don't care about up/down if bridge itself is down, because
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* port state is checked when bridge is brought up.
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*/
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static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
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{
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struct net_device *dev = ptr;
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struct net_bridge_port *p = dev->br_port;
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struct net_bridge *br;
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/* not a port of a bridge */
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if (p == NULL)
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return NOTIFY_DONE;
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br = p->br;
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spin_lock_bh(&br->lock);
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switch (event) {
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case NETDEV_CHANGEMTU:
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dev_set_mtu(br->dev, br_min_mtu(br));
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break;
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case NETDEV_CHANGEADDR:
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br_fdb_changeaddr(p, dev->dev_addr);
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br_stp_recalculate_bridge_id(br);
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break;
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case NETDEV_CHANGE:
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if (br->dev->flags & IFF_UP)
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schedule_delayed_work(&p->carrier_check, BR_PORT_DEBOUNCE);
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break;
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case NETDEV_FEAT_CHANGE:
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if (br->dev->flags & IFF_UP)
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br_features_recompute(br);
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/* could do recursive feature change notification
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* but who would care??
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*/
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break;
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case NETDEV_DOWN:
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if (br->dev->flags & IFF_UP)
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br_stp_disable_port(p);
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break;
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case NETDEV_UP:
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if (netif_carrier_ok(dev) && (br->dev->flags & IFF_UP))
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br_stp_enable_port(p);
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break;
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case NETDEV_UNREGISTER:
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spin_unlock_bh(&br->lock);
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br_del_if(br, dev);
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goto done;
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}
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spin_unlock_bh(&br->lock);
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done:
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return NOTIFY_DONE;
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}
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