netdev - Re: [patch, v2] IPVS: Add handling of incoming ICMPV6 messages

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Message-ID: <4A9BDCEA.1090008@trash.net>
Date:	Mon, 31 Aug 2009 16:23:38 +0200
From:	Patrick McHardy <kaber@...sh.net>
To:	Simon Horman <horms@...ge.net.au>
CC:	lvs-devel@...r.kernel.org, netdev@...r.kernel.org,
	David Miller <davem@...emloft.net>,
	Julius Volz <julius.volz@...il.com>,
	Rob Gallagher <robert.gallagher@...net.ie>
Subject: Re: [patch, v2] IPVS: Add handling of incoming ICMPV6 messages

Simon Horman wrote:
> From: Julius Volz <julius.volz@...il.com>
> 
> IPVS: Add handling of incoming ICMPV6 messages
> 
> Add handling of incoming ICMPv6 messages.
> This follows the handling of IPv4 ICMP messages.
> 
> Amongst ther things this problem allows IPVS to behave sensibly
> when an ICMPV6_PKT_TOOBIG message is received:
> 
>     This message is received when a realserver sends a packet >PMTU to the
>     client. The hop on this path with insufficient MTU will generate an
>     ICMPv6 Packet Too Big message back to the VIP. The LVS server receives
>     this message, but the call to the function handling this has been
>     missing. Thus, IPVS fails to forward the message to the real server,
>     which then does not adjust the path MTU. This patch adds the missing
>     call to ip_vs_in_icmp_v6() in ip_vs_in() to handle this situation.
> 
>     Thanks to Rob Gallagher from HEAnet for reporting this issue and for
>     testing this patch in production (with direct routing mode).

Applied, thanks.
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