Re: [patch net-next] ipv4: introduce address lifetime

[David Miller <davem@davemloft.net>]

From: Jiri Pirko <jiri@resnulli.us>
Date: Thu, 24 Jan 2013 20:41:41 +0100

> There are some usecase when lifetime of ipv4 addresses might be helpful.
> For example:
> 1) initramfs networkmanager uses a DHCP daemon to learn network
> configuration parameters
> 2) initramfs networkmanager addresses, routes and DNS configuration
> 3) initramfs networkmanager is requested to stop
> 4) initramfs networkmanager stops all daemons including dhclient
> 5) there are addresses and routes configured but no daemon running. If
> the system doesn't start networkmanager for some reason, addresses and
> routes will be used forever, which violates RFC 2131.
> 
> This patch is essentially a backport of ivp6 address lifetime mechanism
> for ipv4 addresses.
> 
> Current "ip" tool supports this without any patch (since it does not
> distinguish between ipv4 and ipv6 addresses in this perspective.
> 
> Also, this should be back-compatible with all current netlink users.
> 
> Reported-by: Pavel Šimerda <psimerda@redhat.com>
> Signed-off-by: Jiri Pirko <jiri@resnulli.us>

Seems reasonable, applied, thanks.