From owner-freebsd-arch@FreeBSD.ORG  Wed Jul 21 12:29:23 2004
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To: Doug Rabson <dfr@nlsystems.com>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Wed, 21 Jul 2004 13:20:31 BST."
             <1090412431.7114.13.camel@builder02.qubesoft.com> 
Date: Wed, 21 Jul 2004 14:29:21 +0200
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cc: arch@freebsd.org
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Subject: Re: kldunload DIAGNOSTIC idea... 
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In message <1090412431.7114.13.camel@builder02.qubesoft.com>, Doug Rabson write
s:

>> The problem is that I cannot find the device_t without dereferencing
>> the struct cdev (either for si_driver[12] or the dev_t) and by then
>> it is too late.  There is no way we can avoid refcounting on the cdev.
>
>Ok, so you are going to handle this in specfs (or whatever replaces
>specfs)? That makes sense.

That's the only way I can see to avoid tons of copy&paste code all over
the drivers, because it's all the same for them.

>Any ideas on how network interfaces should
>work in this?

I talked with Robert briefly about this yesterday, and the problem
there is that struct ifnet is embedded in the softc.  If the softc
had a pointer to the ifnet, then we could do something similar, but
as long as it's embedded we're stuck.


-- 
Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
phk@FreeBSD.ORG         | TCP/IP since RFC 956
FreeBSD committer       | BSD since 4.3-tahoe    
Never attribute to malice what can adequately be explained by incompetence.