[ovs-dev] Use of netlink library

[Jesse Gross]

On Mon, Sep 24, 2012 at 7:48 AM, Saleha Asad <salehageti at gmail.com> wrote:
> Dear all,
>
> I am setting up a GRE tunnel using Open vSwitch. In the ovs-vsctl command
> when I set the gre interface I also declare a remote_ip in the options. To
> use the gre key I add another option named key. Please if anybody can help
> me in finding out that once I set the key in the gre options how is the
> netlink library used to bring this key from user space to kernel space and
> then the key is further used in the tunnel.c code to get stored in
> mutable->out_key field. If anyone could elaborate the procedure of bringing
> this key in kernel space it would be really helpful. Actually I want to
> create more options when I set up the tunnel and then use these options in
> my code, which I think would become very easy if I know the working of
> netlink library in OVS.

I think if you grep the source for the names of the options that you
are using it will quickly become apparent what values they cause to be
set.