netdev - Re: [PATCH net-next] veth: report NEWLINK event when moving the peer device in a new namespace

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Date:   Fri, 31 Aug 2018 09:24:31 -0600
From:   David Ahern <dsahern@...il.com>
To:     Lorenzo Bianconi <lorenzo.bianconi@...hat.com>, davem@...emloft.net
Cc:     netdev@...r.kernel.org
Subject: Re: [PATCH net-next] veth: report NEWLINK event when moving the peer
 device in a new namespace

On 8/31/18 5:43 AM, Lorenzo Bianconi wrote:
> When moving a veth device to another namespace, userspace receives a
> RTM_DELLINK message indicating the device has been removed from current
> netns. However, the other peer does not receive a netlink event
> containing new values for IFLA_LINK_NETNSID and IFLA_LINK veth
> attributes.
> Fix that behaviour sending to userspace a RTM_NEWLINK message in the peer
> namespace to report new IFLA_LINK_NETNSID/IFLA_LINK values
> 

A newlink message is generated in the new namespace. What information is
missing from that message?