netdev - Re: [PATCH net-next] hyperv: Add handler for RNDIS_STATUS_NETWORK

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Message-Id: <20140623.130608.499310171187852386.davem@davemloft.net>
Date:	Mon, 23 Jun 2014 13:06:08 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	olaf@...fle.de
Cc:	haiyangz@...rosoft.com, greg@...ah.com, netdev@...r.kernel.org,
	jasowang@...hat.com, driverdev-devel@...uxdriverproject.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next] hyperv: Add handler for
 RNDIS_STATUS_NETWORK_CHANGE event

From: Olaf Hering <olaf@...fle.de>
Date: Mon, 23 Jun 2014 15:17:23 +0200

> On Mon, Jun 23, Haiyang Zhang wrote:
> 
>> > I think its reasonable to expect guest config changes on this new kind
>> > of host. Would a link-down/link-up event work? I'm sure it will, there
>> > is enough code floating around in the guests which handles cable unplug.
>> 
>> Do you mean netif_carrier_off() / netif_carrier_on()? They are already 
>> called in the code before this patch, but DHCP renew is not triggered by
>> them.
> 
> I do not know how to simulate a cable unplug. The point is that calling
> /etc/init.d/network will fail, at least in SLES12.
> Maybe some sort of "DHCP refresh required" event is required?
> Maybe the DHCP clients need to renew on cable unplug?
> No idea what the solution to the issue really is.

What's in the driver right now is definitely not it, and I want this
network restart code removed immediately.
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