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net: add netnotifier event for upper device change 

Now when upper device is changed, event is not propagated via RT Netlink
to userspace. Userspace might never now about the change. Fix this by
adding upper-device-change notifier event.

Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jiri Pirko 2013-05-25 04:12:10 +00:00 committed by David S. Miller
parent 8513fbd880
commit 42e52bf9e3
2 changed files with 3 additions and 1 deletions
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1
include/linux/netdevice.h
View File

@ -1593,6 +1593,7 @@ struct packet_offload {
#define NETDEV_RELEASE 0x0012
#define NETDEV_NOTIFY_PEERS 0x0013
#define NETDEV_JOIN 0x0014
#define NETDEV_CHANGEUPPER 0x0015
extern int register_netdevice_notifier(struct notifier_block *nb);
extern int unregister_netdevice_notifier(struct notifier_block *nb);

3
net/core/dev.c
View File

@ -4411,7 +4411,7 @@ static int __netdev_upper_dev_link(struct net_device *dev,
else
list_add_tail_rcu(&upper->list, &dev->upper_dev_list);
dev_hold(upper_dev);
call_netdevice_notifiers(NETDEV_CHANGEUPPER, dev);
return 0;
}
@ -4471,6 +4471,7 @@ void netdev_upper_dev_unlink(struct net_device *dev,
list_del_rcu(&upper->list);
dev_put(upper_dev);
kfree_rcu(upper, rcu);
call_netdevice_notifiers(NETDEV_CHANGEUPPER, dev);
}
EXPORT_SYMBOL(netdev_upper_dev_unlink);