1 /*
2 * Device event handling
3 * Linux ethernet bridge
4 *
5 * Authors:
6 * Lennert Buytenhek <buytenh@gnu.org>
7 *
8 * $Id: br_notify.c,v 1.2 2000/02/21 15:51:34 davem Exp $
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License
12 * as published by the Free Software Foundation; either version
13 * 2 of the License, or (at your option) any later version.
14 */
15
16 #include <linux/kernel.h>
17 #include <linux/if_bridge.h>
18 #include "br_private.h"
19
20 static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr);
21
22 struct notifier_block br_device_notifier =
23 {
24 br_device_event,
25 NULL,
26 0
27 };
28
29 static int br_device_event(struct notifier_block *unused, unsigned long event, void *ptr)
30 {
31 struct net_device *dev;
32 struct net_bridge_port *p;
33
34 dev = ptr;
35 p = dev->br_port;
36
37 if (p == NULL)
38 return NOTIFY_DONE;
39
40 switch (event)
41 {
42 case NETDEV_CHANGEADDR:
43 read_lock(&p->br->lock);
44 br_fdb_changeaddr(p, dev->dev_addr);
45 br_stp_recalculate_bridge_id(p->br);
46 read_unlock(&p->br->lock);
47 break;
48
49 case NETDEV_GOING_DOWN:
50 /* extend the protocol to send some kind of notification? */
51 break;
52
53 case NETDEV_DOWN:
54 if (p->br->dev.flags & IFF_UP) {
55 read_lock(&p->br->lock);
56 br_stp_disable_port(dev->br_port);
57 read_unlock(&p->br->lock);
58 }
59 break;
60
61 case NETDEV_UP:
62 if (p->br->dev.flags & IFF_UP) {
63 read_lock(&p->br->lock);
64 br_stp_enable_port(dev->br_port);
65 read_unlock(&p->br->lock);
66 }
67 break;
68
69 case NETDEV_UNREGISTER:
70 br_del_if(dev->br_port->br, dev);
71 break;
72 }
73
74 return NOTIFY_DONE;
75 }
76
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