On Tue, 10 Jan 2017 19:29:21 +0530, Pravin Shelar wrote:
> OVS kernel module has compile time checks for various kernel features,
> if any of required tunnel feature is missing OVS kernel module
> compiles in support for its own tunnel implementation. This compat
> tunnel implementation is exposed as ovs_* tunnel device.
> Therefore if ovs_geneve device availability shows that current kernel
> tunnel device does not support all features and we should use OVS
> compat tunnel implementation. To use compat-tunnel implementation we
> have to use gnetlink interface. OVS compat tunnels code do not support
> LWT interface.
I've been trying to wrap my head around this for some time already but
I'm afraid I may still not understand what you mean.
By "exposed as ovs_* tunnel device", do you mean rtnetlink kind? If so,
then the steps to create the interface (a geneve tunnel in this example)
would be:
create an ovs_geneve interface using rtnetlink
if successful {
delete the created interface
create geneve interface using genetlink
if successful {
done
} else {
fail
}
} else {
create lwtunnel geneve interface using rtnetlink
check parameters of the created interface
if it is lwtunnel {
done
} else {
delete the created interface
create geneve interface using genetlink
if successful {
done
} else {
fail
}
}
}
Is it what you have in mind?
Jiri
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