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net: add netnotifier event for upper device change

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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
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@ -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);