From mboxrd@z Thu Jan 1 00:00:00 1970 From: Zhu Yanjun Subject: [PATCH V2 0/1] ipv4: net namespace does not inherit network configurations Date: Thu, 21 Aug 2014 10:32:00 +0800 Message-ID: <1408588321-13537-1-git-send-email-Yanjun.Zhu@windriver.com> Cc: Zhu Yanjun To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org, zyjzyj2000@gmail.com, Yue.Tao@windriver.com, alexandre.dietsch@windriver.com, davem@davemloft.net, honkiko@gmail.com, cwang@twopensource.com Return-path: Sender: linux-kernel-owner@vger.kernel.org List-Id: netdev.vger.kernel.org V2: Following the advice from Cong Wang, I submit a patch as normal. Hi,all I did a test on kernel3.16 rc6: root@qemu1:~# echo 1 > /proc/sys/net/ipv6/conf/all/forwarding root@qemu1:~# echo 1 > /proc/sys/net/ipv4/conf/all/forwarding root@qemu1:~# ip netns list root@qemu1:~# ip netns add fib1 root@qemu1:~# ip netns exec fib1 bash root@qemu1:~# cat /proc/sys/net/ipv6/conf/all/forwarding 0 root@qemu1:~# cat /proc/sys/net/ipv4/conf/all/forwarding 1 The behavior of ipv4 and ipv6 is very inconsistent. I checked the kernel source code. I found that from this patch [ipv6: fix bad free of addrconf_init_net], the above difference appeared. Since a net namespace is independent to another. That is, there is no any relationship between the net namespaces. So the behavior of ipv4 is not correct. Based on this patch [ipv6: fix bad free of addrconf_init_net], I made a new patch to fix this problem on ipv4. Any reply is appreciated. Zhu Yanjun (1): ipv4: net namespace does not inherit network configurations net/ipv4/devinet.c | 29 ++++++++++++----------------- 1 file changed, 12 insertions(+), 17 deletions(-) -- 1.9.1