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net: forbid underlaying devices to change its type 

It's not desired for underlaying devices to change type. At the time,
there is for example possible to have bond with changed type from
Ethernet to Infiniband as a port of a bridge. This patch fixes this.

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: Jay Vosburgh <fubar@us.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2010-03-10 10:30:19 +00:00 committed by David S. Miller
parent 3ca5b4042e
commit 1c01fe14a8
3 changed files with 11 additions and 0 deletions
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3
drivers/net/macvlan.c
View File

@ -748,6 +748,9 @@ static int macvlan_device_event(struct notifier_block *unused,
list_for_each_entry_safe(vlan, next, &port->vlans, list)
vlan->dev->rtnl_link_ops->dellink(vlan->dev, NULL);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
}
return NOTIFY_DONE;
}

4
net/8021q/vlan.c
View File

@ -530,6 +530,10 @@ static int vlan_device_event(struct notifier_block *unused, unsigned long event,
}
unregister_netdevice_many(&list);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
}
out:

4
net/bridge/br_notify.c
View File

@ -82,6 +82,10 @@ static int br_device_event(struct notifier_block *unused, unsigned long event, v
case NETDEV_UNREGISTER:
br_del_if(br, dev);
break;
case NETDEV_PRE_TYPE_CHANGE:
/* Forbid underlaying device to change its type. */
return NOTIFY_BAD;
}
/* Events that may cause spanning tree to refresh */