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From: David Miller <davem@davemloft.net>
To: hirofumi@mail.parknet.co.jp
Cc: netdev@vger.kernel.org
Subject: Re: problem of "ipv4: revert Set rt->rt_iif more sanely on output routes."
Date: Wed, 06 Apr 2011 22:34:00 -0700 (PDT)	[thread overview]
Message-ID: <20110406.223400.71127145.davem@davemloft.net> (raw)
In-Reply-To: <87ipuqsmwl.fsf@devron.myhome.or.jp>

From: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Date: Thu, 07 Apr 2011 13:31:06 +0900

> I'm not pretty sure though, output message is
> 
> 	ip_finish_output2: No header cache and no neighbour!
> 
> I'm not debugging this though,
> 
> static inline bool rt_is_output_route(struct rtable *rt)
> {
> 	return rt->rt_iif == 0;
> }
> 
> from review I guess the above is one of cause.

arp_bind_neighbour() is only called if rt_is_output_route() is true
or route is unicast.

If packet is sent using a route for which arp_bind_neighbour() has not
been called, you will see that warning message.

  reply	other threads:[~2011-04-07  5:34 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-04-05 13:05 problem of "ipv4: revert Set rt->rt_iif more sanely on output routes." OGAWA Hirofumi
2011-04-05 14:11 ` OGAWA Hirofumi
2011-04-05 14:57   ` OGAWA Hirofumi
2011-04-06 20:28 ` David Miller
2011-04-07  4:31   ` OGAWA Hirofumi
2011-04-07  5:34     ` David Miller [this message]
2011-04-07  5:42       ` David Miller
2011-04-07  7:19         ` OGAWA Hirofumi
2011-04-07  8:29           ` OGAWA Hirofumi
2011-04-07  8:32             ` OGAWA Hirofumi
2011-04-07 20:58               ` David Miller
2011-04-07 21:03             ` David Miller

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