netdev - Re: Question about an assignment in handle

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Date:	Wed, 26 May 2010 07:38:01 -0400
From:	jamal <hadi@...erus.ca>
To:	Herbert Xu <herbert@...dor.apana.org.au>
Cc:	Jiri Pirko <jpirko@...hat.com>, netdev@...r.kernel.org,
	davem@...emloft.net, kaber@...sh.net
Subject: Re: Question about an assignment in handle_ing()

On Wed, 2010-05-26 at 09:13 +1000, Herbert Xu wrote:

> If it did happen like you said then it would be a serious bug
> in our stack as everything else (including the TCP stack) relies
> on this.

It could have been a bug. Note this was not a simple test, so there
may be other factors involved. If you or Jiri are willing to run the
test i will construct a scenario which will test this out. It will need
a compile of the kernel and a small check in pedit to see if we see
cloned skbs when we run the two tcpdumps (and to make sure the tcpdumps
see the correct bytes). Otherwise i will get to it by weekend.
BTW: Jiri, out of curiosity - what was the issue seen that caused the
original question?

> But how can the caller make that decision when you return exactly
> the same value in the error case as the normal case?

Ok - i see your point Herbert ;-> 
it makes sense to have pedit have an error action code like some of the
others actions which defaults to a drop.
I will do a proper patch sometime this weekend.

cheers,
jamal

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