From owner-freebsd-net@FreeBSD.ORG Fri Oct 3 18:50:22 2003 Return-Path: Delivered-To: freebsd-net@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 7FCF916A4BF for ; Fri, 3 Oct 2003 18:50:22 -0700 (PDT) Received: from smtp.noos.fr (nan-smtp-09.noos.net [212.198.2.80]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1B5B343FCB for ; Fri, 3 Oct 2003 18:50:20 -0700 (PDT) (envelope-from root@noos.fr) Received: (qmail 1409845 invoked by uid 0); 4 Oct 2003 01:46:14 -0000 Received: (qmail 226322 invoked by uid 0); 30 Sep 2003 22:26:53 -0000 Received: from unknown (HELO mx2.freebsd.org) ([216.136.204.119]) (envelope-sender ) by 212.198.2.80 (qmail-ldap-1.03) with SMTP for ; 30 Sep 2003 22:26:53 -0000 Received: from hub.freebsd.org (hub.freebsd.org [216.136.204.18]) by mx2.freebsd.org (Postfix) with ESMTP id 2DF8357215; Tue, 30 Sep 2003 10:58:49 -0700 (PDT) (envelope-from owner-freebsd-arch@freebsd.org) Received: from hub.freebsd.org (localhost [127.0.0.1]) by hub.freebsd.org (Postfix) with ESMTP id 86A3516A4E9; Tue, 30 Sep 2003 10:58:47 -0700 (PDT) Delivered-To: freebsd-arch@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 6279C16A4B3; Tue, 30 Sep 2003 10:56:46 -0700 (PDT) Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.86.163]) by mx1.FreeBSD.org (Postfix) with ESMTP id 1C0F944011; Tue, 30 Sep 2003 10:56:45 -0700 (PDT) (envelope-from phk@phk.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.12.9/8.12.9) with ESMTP id h8UHufOP013248; Tue, 30 Sep 2003 19:56:42 +0200 (CEST) (envelope-from phk@phk.freebsd.dk) To: Brooks Davis From: "Poul-Henning Kamp" In-Reply-To: Your message of "Tue, 30 Sep 2003 10:15:36 PDT." <20030930171535.GA31908@Odin.AC.HMC.Edu> Date: Tue, 30 Sep 2003 19:56:41 +0200 Message-ID: <13247.1064944601@critter.freebsd.dk> X-BeenThere: freebsd-arch@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list Sender: owner-freebsd-arch@freebsd.org Errors-To: owner-freebsd-arch@freebsd.org cc: arch@FreeBSD.org cc: net@FreeBSD.org Subject: Re: adding if_dev member to struct ifnet X-BeenThere: freebsd-net@freebsd.org List-Id: Networking and TCP/IP with FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 04 Oct 2003 01:50:22 -0000 In message <20030930171535.GA31908@Odin.AC.HMC.Edu>, Brooks Davis writes: >> Somebody please explain how this would work for non-hardware >> interfaces like if_loop, if_tun, if_tap etc ? > >if_dev would be NULL when a device_t was not available. Code which used >this feature would be required to either check that if_dev was non-NULL >before trying to use it or have special knowldege that it only gets >called with struct ifnet instances which have a non-NULL if_dev member. >For instance, driver routines which take a struct ifnet would know that >they are only called on their own ifnet so they could assume they had >filled it in. So you'd still have to keep the if_name + if_unit around for the drivers which do not have a device_t ? -- 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. _______________________________________________ freebsd-arch@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-arch To unsubscribe, send any mail to "freebsd-arch-unsubscribe@freebsd.org"