tree 7bd1d45855ac7457be6d50338c60751f19e436d9
parent e9dc86534051b78e41e5b746cccc291b57a3a311
author Eric W. Biederman <ebiederm@xmission.com> 1189595138 +0200
committer David S. Miller <davem@sunset.davemloft.net> 1192060149 -0700

[NET]: Support multiple network namespaces with netlink

Each netlink socket will live in exactly one network namespace,
this includes the controlling kernel sockets.

This patch updates all of the existing netlink protocols
to only support the initial network namespace.  Request
by clients in other namespaces will get -ECONREFUSED.
As they would if the kernel did not have the support for
that netlink protocol compiled in.

As each netlink protocol is updated to be multiple network
namespace safe it can register multiple kernel sockets
to acquire a presence in the rest of the network namespaces.

The implementation in af_netlink is a simple filter implementation
at hash table insertion and hash table look up time.

Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>