Hi, On Sat, 24 Sep 2016 17:07:12 -0700 Cong Wang <xiyou.wangc...@gmail.com> wrote: > One problem to use your code for us is that, the RX side of veth > is inside containers, not visible to outside, perhaps we need some > more parameter to tell the netns before the device name/index? > Thoughts?
Well, this is way trickier... tc_mirred doesn't cope with netns movement of the target device. See 'mirred_device_event': upon NETDEV_UNREGISTER the 'tcfm_dev' gets nullified. (dev_change_net_namespace sequence includes NETDEV_UNREGISTER, dev_net_set, NETDEV_REGISTER). As upposed to veth, which keeps the peer netdev pointer (since veth peers lifetime is coupled), here in act_mirred we can't easily distinguish a "real" NETDEV_UNREGISTER vs a namespace change...
