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Date:   Sat, 27 Aug 2016 09:09:11 +0800
From:   Eli Cooper <>
To:     Shmulik Ladkani <>,
        Tom Herbert <>
Cc:, "David S . Miller" <>
Subject: Re: [PATCH] ipv6: Don't unset flowi6_proto in ipxip6_tnl_xmit()


On 2016/8/27 3:49, Shmulik Ladkani wrote:
> However new users of 'ip6_tnl_xmit' (e.g. __gre6_xmit callers) may still
> have their 'fl6->flowi6_proto' not armed.
> Maybe the right fix is assigning 'fl6->flowi6_proto = proto', either at
> start of 'ip6_tnl_xmit' or just prior the ip6_route_output() call.

The only other user of ip6_tnl_xmit() is ip6gre, and it has its
fl6->flowi6_proto set in ip6gre_tnl_link_config() as in commit
252f3f5a1189 ("ip6_gre: Set flowi6_proto as IPPROTO_GRE in xmit path.")

Assigning flowi6_proto at the start of ip6_tnl_xmit() was also my first
idea, but I was unsure which fix would be better.


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