On 07.06.2016 22:42, Philip Prindeville wrote:
> On 06/07/2016 02:23 PM, Hannes Frederic Sowa wrote:
>>
>> On Tue, Jun 7, 2016, at 21:48, Philip Prindeville wrote:
>>> static struct rtnl_link_ops ipgre_link_ops __read_mostly = {
>>> diff --git a/net/ipv4/ip_tunnel.c b/net/ipv4/ip_tunnel.c
>>> index d8f5e0a..95649eb 100644
>>> --- a/net/ipv4/ip_tunnel.c
>>> +++ b/net/ipv4/ip_tunnel.c
>>> @@ -682,7 +682,7 @@ void ip_tunnel_xmit(struct sk_buff *skb, struct
>>> net_device *dev,
>>> }
>>> df = tnl_params->frag_off;
>>> - if (skb->protocol == htons(ETH_P_IP))
>>> + if (skb->protocol == htons(ETH_P_IP) && !tunnel->ignore_df)
>>> df |= (inner_iph->frag_off&htons(IP_DF));
>>> max_headroom = LL_RESERVED_SPACE(rt->dst.dev) + sizeof(struct
>>> iphdr)
>> Is still enforce that we inherit the ttl from the inner header to the
>> outer header if we don't set df bit?
>>
>> Thanks,
>> Hannes
>
> That's correct. That happens a few lines above and we don't change that
> behavior with this patch.
It should be discouraged to use this feature, but I have to admit that I
already used stripping of DF bit, too.
Acked-by: Hannes Frederic Sowa <han...@stressinduktion.org>
Thanks,
Hannes
