On 3/9/21 5:43 AM, Tony Lu wrote:
> There are lots of net namespaces on the host runs containers like k8s.
> It is very common to see the same interface names among different net
> namespaces, such as eth0. It is not possible to distinguish them without
> net namespace inode.
>
> This adds net namespace inode for all net_dev events, help us
> distinguish between different net devices.
>
> Output:
> <idle>-0 [006] ..s. 133.306989: net_dev_xmit: net_inum=4026531992
> dev=eth0 skbaddr=0000000011a87c68 len=54 rc=0
>
> Signed-off-by: Tony Lu <ton...@linux.alibaba.com>
> ---
>
There was a proposal from Lorenz to use netns cookies (SO_NETNS_COOKIE) instead.
They have a guarantee of being not reused.
After 3d368ab87cf6681f9 ("net: initialize net->net_cookie at netns setup")
net->net_cookie is directly available.
