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Date:	Mon, 05 May 2014 13:12:28 -0400 (EDT)
From:	David Miller <>
Subject: Re: [PATCH net-next] unregister_netdevice : move RTM_DELLINK to
 until after ndo_uninit

Date: Thu,  1 May 2014 11:40:30 -0700

> From: roopa <>

Please fix your setup so that your real full name appears in the From:
tag, not just 'roopa'.  I fixed it up for you this time.

> This patch fixes ordering of rtnl notifications during unregister_netdevice
> by moving RTM_DELLINK notification to until after ndo_uninit.
> The problem was seen with unregistering bond netdevices.
> bond ndo_uninit callback generates a few RTM_NEWLINK notifications for
> NETDEV_CHANGEADDR and NETDEV_FEAT_CHANGE. This is seen mostly when the
> bond is deleted with slaves still enslaved to the bond.
> During unregister netdevice (rollback_registered_many to be specific)
> bond ndo_uninit is called after RTM_DELLINK notification goes out.
> This results in userspace seeing RTM_DELLINK followed by a couple of
> In userspace problem was seen with libnl. libnl cache deletes the bond
> when it sees RTM_DELLINK and re-adds the bond with the following
> RTM_NEWLINK. Resulting in a stale bond entry in libnl cache when the kernel
> has already deleted the bond.
> This patch has been tested for bond, bridges and vlan devices.
> Signed-off-by: Roopa Prabhu <>

Applied, thanks.
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