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Date:      Wed, 05 Jan 2005 14:33:33 -0700
From:      Scott Long <scottl@freebsd.org>
To:        Roman Kurakin <rik@cronyx.ru>
Cc:        Julian Elischer <julian@elischer.org>
Subject:   Re: netgraph(4) initialization order
Message-ID:  <41DC5D2D.8040308@freebsd.org>
In-Reply-To: <41DC5910.8030905@cronyx.ru>
References:  <41DB08B9.6090801@savvis.net> <41DB1310.4060807@cronyx.ru> <41DB1700.7060708@savvis.net> <41DB1839.9080104@elischer.org> <41DC4FA2.8070609@savvis.net> <41DC5398.8020508@freebsd.org> <41DC5561.4090005@savvis.net> <41DC5690.3090205@freebsd.org> <41DC5910.8030905@cronyx.ru>

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Roman Kurakin wrote:

> Scott Long:
> 
>> Maksim Yevmenkin wrote:
>>
>>> Scott Long wrote:
>>>
>>>> Maksim Yevmenkin wrote:
>>>>
>>>>> Dear Hackers,
>>>>>
>>>>> any objections to the attached patch?
>>>>>
>>>>
>>>> Yes, as I stated in another email, I think that the core netgraph
>>>> module should be initialized before the SI_SUB_DRIVERS step.  I
>>>> propose creating a new sysinit called SI_SUB_NETGRAPH with a value
>>>> of 0x30100000.  That way it comes after SI_SUB_IF and before
>>>> SI_SUB_DRIVERS.  This make fiddling with SI_ORDER_* unneccesary.
>>>
>>>
>>>
>>> how about new attached patch?
>>>
>>> thanks,
>>> max
>>
>>
>>
>> Exactly what I had in mind =-)  Have you tested this out to make sure
>> it fixes the problem cases? 
> 
> 
> But this wouldn't save from the same problem it the future.
> 
> rik
> 

What same problem?  This ensures that the netgraph core gets initialized
before any driver.  Keeping it at SI_SUB_DRIVERS and trying to order the
it via SI_ORDER_* is risky because you can't guarantee that some other
driver won't try to also take SI_ORDER_FIRST.

Scott



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