Date: Wed, 25 Jan 2006 16:14:52 -0800 From: Sam Leffler <sam@errno.com> To: Robert Watson <rwatson@freebsd.org> Cc: rizzo@icir.org, John-Mark Gurney <gurney_j@resnet.uoregon.edu>, julian@elischer.org, sthaug@nethelp.no, current@freebsd.org Subject: Re: if_flags usage etc. Message-ID: <43D8147C.5080609@errno.com> In-Reply-To: <20060125104901.X70912@fledge.watson.org> References: <20060124075437.B67285@xorpc.icir.org> <43D67C6E.7020403@errno.com> <43D6811D.9070309@elischer.org> <20060124.231504.74682748.sthaug@nethelp.no> <20060124223539.GH69162@funkthat.com> <20060125104901.X70912@fledge.watson.org>
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Robert Watson wrote: > > On Tue, 24 Jan 2006, John-Mark Gurney wrote: > >> sthaug@nethelp.no wrote this message on Tue, Jan 24, 2006 at 23:15 +0100: >> >>>> We should probably better document the interface "interface". if we are >>>> going to (as Sam suggests) >>>> do some cleanups we might as well consider what other changes should be >>>> put in at the same time. >>> >>> >>> A couple of other suggestions: >>> >>> - For software routers (quagga, zebra etc.) it would be very nice to >>> have "link up" / "link down" notifications to the routing process(es). >> >> >> already supported, either through kqueue, routing socket, or devd (I >> believe)... > > > However, I believe some interface drivers don't generate these events. > Drivers not supporting a specific event delivered by an interrupt > probably need to learn to poll for state changes so that they can > generate an event. I am not aware of any drivers that do not generate the events; only drivers that do not properly detect link status changes. Sam
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