From: Alexei Starovoitov <alexei.starovoi...@gmail.com>
Date: Mon, 3 Aug 2015 21:23:40 -0700
> On Mon, Aug 03, 2015 at 05:27:26PM -0700, Pravin B Shelar wrote:
>> With addition of flow based tunneling, there is no need to
>> have special GRE vport. Removes all of the OVS specific
>> GRE code and make OVS use a ip_gre net_device.
>> Minimal GRE vport is kept to handle compatibility with
>> current userspace application.
>>
>> Signed-off-by: Pravin B Shelar <pshe...@nicira.com>
> ...
>> +#define GRE_TAP_FB_NAME "gretap0"
> ...
>> + /* fallback device is used for flow based tunneling. */
>> + if (!strcmp(dev->name, GRE_TAP_FB_NAME)) {
>> + struct ip_tunnel *t;
>> +
>> + t = netdev_priv(dev);
>> + t->flow_based_tunnel = true;
>> + eth_hw_addr_random(dev);
>> + netif_keep_dst(dev);
>> + }
>> +
>
> feature detection based on netdev name?
> meaning that there will be only one such device for the whole
> host? and namespaces cannot have their own gre tunnels?
> (since host 'gretap0' cannot be seen in netns)
Doing anything like this by netdev name is wrong.
Pravin you will need to do this in some other way.
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