On 8/10/17 10:48 AM, David Miller wrote:
> From: Andrew Lunn <and...@lunn.ch>
> Date: Thu, 10 Aug 2017 18:27:22 +0200
>> On Thu, Aug 10, 2017 at 05:24:55PM +0200, Vitaly Kuznetsov wrote:
>>> Andrew Lunn <and...@lunn.ch> writes:
>>>>> We are - rtnetlink_event() does the job. We, however, don't have a
>>>>> special IFLA_EVENT_* for name change and end up with IFLA_EVENT_NONE.
>>>> What is in this event? Old and new name? Just the new name?
>>> Basically, it's everything we know about the interface - type, index,
>>> name, mtu, qdisc, ... - see rtnl_fill_ifinfo(). Back to your question -
>>> it's only the new name.
>> So the program needs to keep track of ifindex to know which interface
>> has changed name. Doable.
>> I still expect this has the potential to break something. You probably
>> should be asking on linux-api for the API experts opinion.
> But a greater point is that nobody is monitoring device renames
> explicitly right now.

Just to throw in an example:

Learned of its use from a recent regression:

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