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

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Date:	Sun, 11 Oct 2015 12:01:30 -0600
From:	David Ahern <dsa@...ulusnetworks.com>
To:	Hajime Tazaki <thehajime@...il.com>
Cc:	steffen.klassert@...unet.com, netdev@...r.kernel.org
Subject: Re: [PATCH net-next] net: Fix vti use case with oif in dst lookups
 for IPv6

On 10/11/15 8:24 AM, Hajime Tazaki wrote:
>
> I've faced this issue since the following patch was applied.
>
> commit 741a11d9e4103a8e1c590ef1280143fe654e4e33
> Author: David Ahern <dsa@...ulusnetworks.com>
> Date:   Mon Sep 28 10:12:13 2015 -0700
>
>      net: ipv6: Add RT6_LOOKUP_F_IFACE flag if oif is set
>
> I still couldn't spot which part (other than my posted call
> graph) is broken and am not sure whether the xfrm change
> affects or not (which I need to check the mip6 code again).

Ok, this is a separate problem from what Steffen is hitting.

>
>> Can you apply this patch, and then run:
>>
>> perf record -e fib6:* -a -g
>> perf script
>
> I'm using libos environment right now, so the perf trace
> can't be used as it is.

ok.

Some path in raw6_sendmsg is setting fl6.flowi6_oif. Can you instrument it?
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