]> git.karo-electronics.de Git - linux-beck.git/commit
ipv4: introduce address lifetime
authorJiri Pirko <jiri@resnulli.us>
Thu, 24 Jan 2013 09:41:41 +0000 (09:41 +0000)
committerDavid S. Miller <davem@davemloft.net>
Tue, 29 Jan 2013 18:59:57 +0000 (13:59 -0500)
commit5c766d642bcaffd0c2a5b354db2068515b3846cf
treef5bb2ed37d70c79304c17911de77779ea92c1041
parent5a1dc31708701e54db1b2bb80215c67d61505d3e
ipv4: introduce address lifetime

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>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/linux/inetdevice.h
include/net/addrconf.h
net/ipv4/devinet.c
net/ipv6/addrconf.c