netdev - Re: IGMP on IPv6

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Message-ID: <CAM_iQpWYuQdxF0AOEMHRy7BSmxMVUb-7w7OdgYeOKe6atATsFQ@mail.gmail.com>
Date:   Mon, 17 Apr 2017 14:38:48 -0700
From:   Cong Wang <xiyou.wangcong@...il.com>
To:     Murali Karicheri <m-karicheri2@...com>
Cc:     Hangbin Liu <liuhangbin@...il.com>,
        "open list:TI NETCP ETHERNET DRIVER" <netdev@...r.kernel.org>,
        David Miller <davem@...emloft.net>
Subject: Re: IGMP on IPv6

Hello,

On Thu, Apr 13, 2017 at 9:36 AM, Murali Karicheri <m-karicheri2@...com> wrote:
> On 03/22/2017 11:04 AM, Murali Karicheri wrote:
>> This is going directly to the slave Ethernet interface.
>>
>> When I put a WARN_ONCE, I found this is coming directly from
>> mld_ifc_timer_expire() -> mld_sendpack() -> ip6_output()
>>
>> Do you think this is fixed in latest kernel at master? If so, could
>> you point me to some commits.
>>
>>
> Ping... I see this behavior is also seen on v4.9.x Kernel. Any clue if
> this is fixed by some commit or I need to debug? I see IGMPv6 has some
> fixes on the list to make it similar to IGMPv4. So can someone clarify this is
> is a bug at IGMPv6 code or I need to look into the HSR driver code?
> Since IGMPv4 is going over the HSR interface I am assuming this is a
> bug in the IGMPv6 code. But since I have not experience with this code
> can some expert comment please?
>

How did you configure your network interfaces and IPv4/IPv6 multicast?
IOW, how did you reproduce this? For example, did you change your
HSR setup when this happened since you mentioned
NETDEV_CHANGEUPPER?