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Date:   Fri, 11 Jan 2019 02:57:39 -0800
From:   Eric Dumazet <>
To:     Florian Westphal <>, Tom Herbert <>
Cc:     Linux Kernel Network Developers <>,
        "David S. Miller" <>,
        Eric Dumazet <>,
        Peter Oskolkov <>,
        Timothy Winters <>
Subject: Re: [PATCH v3 23/30] ipv6: defrag: drop non-last frags smaller than
 min mtu

On 01/10/2019 02:22 PM, Florian Westphal wrote:
> Tom Herbert <> wrote:
>> I couldn't find any mention of the advisory in the commit logs or
>> netdev discussion, and apparently there's no protocol requirement that
>> intermediate fragements need to be at least minimal MTU. Maybe this
>> patch should be reverted?
> Currently ipv6 reasm doesn't use rbtree infrastructure, so it would
> have to be converted first.

Section 4.5 of RFC 8200 allows for sending any fragment for
fragments as long they add up to the original packet. 

I do not believe we need an rbtree to implement this idea.

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