> -----Original Message----- > From: Vitaly Kuznetsov [mailto:vkuzn...@redhat.com] > Sent: Friday, October 30, 2015 6:56 AM > To: Haiyang Zhang <haiya...@microsoft.com> > Cc: Richard Weinberger <richard.weinber...@gmail.com>; David Miller > <da...@davemloft.net>; o...@aepfle.de; jasow...@redhat.com; driverdev- > de...@linuxdriverproject.org; LKML <linux-ker...@vger.kernel.org>; > netdev@vger.kernel.org > Subject: Re: [PATCH net-next] hyperv: Add handler for > RNDIS_STATUS_NETWORK_CHANGE event > > Haiyang Zhang <haiya...@microsoft.com> writes: > > >> -----Original Message----- > >> From: Richard Weinberger [mailto:richard.weinber...@gmail.com] > >> Sent: Tuesday, October 27, 2015 6:36 PM > >> To: David Miller <da...@davemloft.net> > >> Cc: Haiyang Zhang <haiya...@microsoft.com>; o...@aepfle.de; Greg > Kroah- > >> Hartman <g...@kroah.com>; netdev@vger.kernel.org; jasow...@redhat.com; > >> driverdev-de...@linuxdriverproject.org; LKML <linux- > >> ker...@vger.kernel.org> > >> Subject: Re: [PATCH net-next] hyperv: Add handler for > >> RNDIS_STATUS_NETWORK_CHANGE event > >> > >> On Mon, Jun 23, 2014 at 10:10 PM, David Miller <da...@davemloft.net> > >> wrote: > >> > From: Haiyang Zhang <haiya...@microsoft.com> > >> > Date: Mon, 23 Jun 2014 16:09:59 +0000 > >> > > >> >> 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? > >> > > >> > No, you are not going to keep the usermodehelper invocation in your > >> driver > >> > please remove it. It is absolutely inappropriate, and I strictly > do > >> not want > >> > to keep it in there because other people will copy it and then > we'll > >> have a > >> > real mess on our hands. > >> > >> Sorry for digging up this old thread. > >> While talking with some guys about usermodehelper abuses I came > across > >> this gem. > >> Mainline still contains that "/etc/init.d/network restart" code. > >> Haiyang, care to cleanup? > > > > Hi Richard and others, > > > > Thanks for the reminder. I will clean up the usermode helper. > > > > Do you have suggestions of trigger DHCP refresh from kernel mode? Any > > sample code in the existing kernel code? > > > > I think it's wrong to call dhcp refresh from kernel. What happens when > we reconnect normal hardware adapter to another network? Link goes down > and then up and userspace is supposed to react accordingly. I think we > should emulate something similar for RNDIS_STATUS_NETWORK_CHANGE.
When link is down physically for a few seconds, the DHCP will automatically refresh. I will add code to emulate this. There were some discussions around this and other possibilities previously... I agree emulating what happens with physically plug/unplug a cable is a reasonable way to trigger the DHCP refresh. Thanks, - Haiyang -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
