netdev - [RFC PATCH net-next 0/2] sit: allow to switch netns during encap/decap

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Message-Id: <1372083239-9451-1-git-send-email-nicolas.dichtel@6wind.com>
Date:	Mon, 24 Jun 2013 16:13:57 +0200
From:	Nicolas Dichtel <nicolas.dichtel@...nd.com>
To:	netdev@...r.kernel.org
Cc:	davem@...emloft.net, ebiederm@...ssion.com, bcrl@...ck.org,
	ravi.mlists@...il.com
Subject: [RFC PATCH net-next 0/2] sit: allow to switch netns during encap/decap


This patch is a follow up of the thread "switching network namespace midway":
http://marc.info/?t=135101459500004&r=1&w=2

The goal of this serie is to add x-netns support for the module sit, ie the
encapsulation addresses and the network device are not owned by the same
namespace.

Example to configure a tunnel:

modprobe sit
ip netns add netns1
ip link add sit1 type sit remote 10.16.0.121 local 10.16.0.249
ip l s sit1 netns netns1
ip netns exec netns1 ip l s lo up
ip netns exec netns1 ip l s sit1 up
ip netns exec netns1 ip a a dev sit1 192.168.2.123 remote 192.168.2.121
ip netns exec netns1 ip -6 a a dev sit1 2001:1234::123 remote 2001:1234::121

I sent this serie as an RFC to get feedback from people. Once this serie is
approved, I will add the same feature for the module ipip and ip6_tunnel.

 include/linux/netdevice.h |  1 +
 include/net/ip_tunnels.h  |  1 +
 net/core/dev.c            | 34 ++++++++++++++++++++++----------
 net/ipv4/ip_tunnel.c      |  7 ++++++-
 net/ipv6/sit.c            | 49 ++++++++++++++++++++++++-----------------------
 5 files changed, 57 insertions(+), 35 deletions(-)

Comments are welcome.

Regards,
Nicolas
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