netdev - Re: [PATCH net-next] net: Fix vti use case with oif in dst lookups for IPv6

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Message-ID: <5617F908.8060807@cumulusnetworks.com>
Date:	Fri, 9 Oct 2015 11:27:36 -0600
From:	David Ahern <dsa@...ulusnetworks.com>
To:	Steffen Klassert <steffen.klassert@...unet.com>,
	Hajime Tazaki <thehajime@...il.com>
Cc:	netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: Fix vti use case with oif in dst lookups
 for IPv6

On 10/9/15 1:17 AM, Steffen Klassert wrote:
>>> diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
>>> index 30caa289c5db..5cedfda4b241 100644
>>> --- a/net/ipv6/xfrm6_policy.c
>>> +++ b/net/ipv6/xfrm6_policy.c
>>> @@ -37,6 +37,7 @@ static struct dst_entry *xfrm6_dst_lookup(struct net *net, int tos, int oif,
>>>
>>>   	memset(&fl6, 0, sizeof(fl6));
>>>   	fl6.flowi6_oif = oif;
>>> +	fl6.flowi6_flags = FLOWI_FLAG_SKIP_NH_OIF;
>>>   	memcpy(&fl6.daddr, daddr, sizeof(fl6.daddr));
>>>   	if (saddr)
>>>   		memcpy(&fl6.saddr, saddr, sizeof(fl6.saddr));
>>
>> I found that this fix is still not sufficient with the mip6
>> (Mobile IPv6) use case.
>
> It does not even fix the vti case. The behaviour of the vti devices is
> the same, with and without the patch.
>

The attached patch applied to Linus' tree works for me. Currently the 
above change is not in his tree, so I added it to this patch. Once you 
confirm that it works for you I'll create the delta-patch for net and 
send out.

Thanks,
David

View attachment "really-fix-vti6-with-oif.patch" of type "text/plain" (1507 bytes)