[pkg-dhcp-devel] Bug#553211: /sbin/dhclient: Patch.

[Michal Suchanek]

Excerpts from Andrew Pollock's message of Sun Nov 20 06:05:54 +0100 2011:
> On Wed, May 18, 2011 at 04:18:11PM +0200, Michal Suchanek wrote:

> 
> > 
> > This patch relies on kernel cache to hold the "ifconfig" and "route"
> > binaries while the network is down and on the network filesystem driver
> > to retry any transactions that might get lost while networking is
> > reenacted by dhclient.
> 
> So if I'm reading your patch correctly, it looks like just the act of doing
> an ifconfig up of an already up interface is enough to cause an NFS-mounted
> root filesystem to lose the plot?

No. The script does "ifconfig $interface inet 0 up" which clears the
internet address in the interface which obviously does break networking.

> 
> Unfortunately since you wrote your patch, we've gone and changed
> dhclient-script to use iproute2 instead of ifconfig and friends, so I'd like
> to know if the "ip link set dev blah up" we're now doing in place of the
> ifconfig call also causes the problem.

So long as it merely brings up the interface but does not change the
address it should not cause problems.

Thanks

Michal