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

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Message-ID: <4ee8be5360a44b5abfa6df871ec45527@DFM-DB3MBX15-06.exchange.corp.microsoft.com>
Date:	Mon, 23 Jun 2014 18:21:13 +0000
From:	Haiyang Zhang <haiyangz@...rosoft.com>
To:	Olaf Hering <olaf@...fle.de>
CC:	Greg KH <greg@...ah.com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"jasowang@...hat.com" <jasowang@...hat.com>,
	"driverdev-devel@...uxdriverproject.org" 
	<driverdev-devel@...uxdriverproject.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"davem@...emloft.net" <davem@...emloft.net>
Subject: RE: [PATCH net-next] hyperv: Add handler for
 RNDIS_STATUS_NETWORK_CHANGE event



> -----Original Message-----
> From: Olaf Hering [mailto:olaf@...fle.de]
> Sent: Monday, June 23, 2014 12:27 PM
> To: Haiyang Zhang
> Cc: Greg KH; netdev@...r.kernel.org; jasowang@...hat.com; driverdev-
> devel@...uxdriverproject.org; linux-kernel@...r.kernel.org;
> davem@...emloft.net
> Subject: Re: [PATCH net-next] hyperv: Add handler for
> RNDIS_STATUS_NETWORK_CHANGE event
> 
> On Mon, Jun 23, Haiyang Zhang wrote:
> 
> > I have tried some possibilities, like IF_OPER_DORMANT then IF_OPER_UP
> > with
> > netdev_state_change() etc. but not able to trigger DHCP review. I will
> > look at this further...
> 
> Is there a link down/up event anyway?
> If the interface is configured to "on hotplug" or "on cable plugged in"
> or whatever the setting name is, the network scripts should do something. Even
> if its not a DHCP renew.

Yes, there is a link down/up event from the host, we currently call netif_carrier_off() 
/ netif_carrier_on() with these events. Will hotplug scripts be triggered by 
netif_carrier_off/on? Where are the scripts located at (SLES)?

> 
> > So, what's the equivalent or similar command to "network restart" on
> > SLES12? Could you update the command line for the usermodehelper when
> > porting this patch to SLES 12?
> 
> I see a /sbin/rcnetwork in SLES, which links either to '/etc/init.d/network' or
> 'service'. This could be used as a quick workaround.

Thanks for the info!

Thanks,
- Haiyang