This is a note to let you know that I've just added the patch titled
net: In unregister_netdevice_notifier unregister the netdevices.
to the 3.3-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-in-unregister_netdevice_notifier-unregister-the-netdevices.patch
and it can be found in the queue-3.3 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <[email protected]> know about it.
>From e46e2813b4a0b98cf319c9c84afb7aa5950d7b9d Mon Sep 17 00:00:00 2001
From: "Eric W. Biederman" <[email protected]>
Date: Fri, 6 Apr 2012 15:33:35 +0000
Subject: net: In unregister_netdevice_notifier unregister the netdevices.
From: "Eric W. Biederman" <[email protected]>
[ Upstream commit 7d3d43dab4e978d8d9ad1acf8af15c9b1c4b0f0f ]
We already synthesize events in register_netdevice_notifier and synthesizing
events in unregister_netdevice_notifier allows to us remove the need for
special case cleanup code.
This change should be safe as it adds no new cases for existing callers
of unregiser_netdevice_notifier to handle.
Signed-off-by: Eric W. Biederman <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Signed-off-by: Greg Kroah-Hartman <[email protected]>
---
net/core/dev.c | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
--- a/net/core/dev.c
+++ b/net/core/dev.c
@@ -1412,14 +1412,34 @@ EXPORT_SYMBOL(register_netdevice_notifie
* register_netdevice_notifier(). The notifier is unlinked into the
* kernel structures and may then be reused. A negative errno code
* is returned on a failure.
+ *
+ * After unregistering unregister and down device events are synthesized
+ * for all devices on the device list to the removed notifier to remove
+ * the need for special case cleanup code.
*/
int unregister_netdevice_notifier(struct notifier_block *nb)
{
+ struct net_device *dev;
+ struct net *net;
int err;
rtnl_lock();
err = raw_notifier_chain_unregister(&netdev_chain, nb);
+ if (err)
+ goto unlock;
+
+ for_each_net(net) {
+ for_each_netdev(net, dev) {
+ if (dev->flags & IFF_UP) {
+ nb->notifier_call(nb, NETDEV_GOING_DOWN, dev);
+ nb->notifier_call(nb, NETDEV_DOWN, dev);
+ }
+ nb->notifier_call(nb, NETDEV_UNREGISTER, dev);
+ nb->notifier_call(nb, NETDEV_UNREGISTER_BATCH, dev);
+ }
+ }
+unlock:
rtnl_unlock();
return err;
}
Patches currently in stable-queue which might be from [email protected] are
queue-3.3/net-in-unregister_netdevice_notifier-unregister-the-netdevices.patch
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