netlink calls should have timeouts

[cpuguy83]

Netlink can be slow, or sometimes not even respond even in a normal case (or so I'm told).
In one case where we have a known kernel bug stuck calls waiting for netlink to respond cause the daemon to freeze (since a container lock is held).

It would be awesome if calls to netlink could use a timeout so we can avoid these types of hangs.

[cpuguy83]

ping @mrjana

[cpuguy83]

Any chance we can get this for 1.13?
How can I help?

[aboch]

I opened vishvananda/netlink#170 for this.