Date: Wed, 15 Dec 1999 10:08:39 -0700 From: Wes Peters <wes@softweyr.com> To: Brian Somers <brian@Awfulhak.org> Cc: Warner Losh <imp@village.org>, freebsd-arch@freebsd.org, brian@hak.lan.Awfulhak.org Subject: Re: The if_detach problem Message-ID: <3857CB17.116DAF99@softweyr.com> References: <199912142145.VAA34161@hak.lan.Awfulhak.org>
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Brian Somers wrote:
>
> >
> > if_detach doesn't, at least not completely.
> >
> > That's a problem when you want to remove interfaces. One problem is
> > that the routing system caches ifaddr and other things. There is a
> > mechanism in place that could be used to clean things up.
> >
> > In the protosw there is a ctlinput routine which accepts various
> > commands. One way to deal with this is to send a new command when ifa
> > goes away. Right now when we do if_down we send a PRC_IFDOWN. Maybe
> > we need to invent a new PRC_, say PRC_IFDETACH. Then we wouldn't need
> > the kludges in if_detach. The ctlinput routines could then, in the
> > appropriate places, scrub the references to the interface that just
> > went away.
> >
> > I'd like to go down this path, any comments?
>
> Not comments, but my thoughts....
>
> Is there a lot to be gained by removing interfaces ?
Think PC Card/CardBus here, Brian. The interface truly is gone.
--
"Where am I, and what am I doing in this handbasket?"
Wes Peters Softweyr LLC
wes@softweyr.com http://softweyr.com/
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