From owner-freebsd-net Wed Mar 27 10:11:51 2002 Delivered-To: freebsd-net@freebsd.org Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by hub.freebsd.org (Postfix) with ESMTP id 5D17A37B41A for ; Wed, 27 Mar 2002 10:11:46 -0800 (PST) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id NAA28306; Wed, 27 Mar 2002 13:11:44 -0500 (EST) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.6/8.9.1) id g2RIBEL73857; Wed, 27 Mar 2002 13:11:14 -0500 (EST) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15522.2882.479989.695082@grasshopper.cs.duke.edu> Date: Wed, 27 Mar 2002 13:11:14 -0500 (EST) To: Archie Cobbs Cc: Luigi Rizzo , freebsd-net@FreeBSD.ORG Subject: Re: ip_output and ENOBUFS In-Reply-To: <200203271753.g2RHr0L41197@arch20m.dellroad.org> References: <20020326231657.A16810@iguana.icir.org> <200203271753.g2RHr0L41197@arch20m.dellroad.org> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-net@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org Archie Cobbs writes: > Luigi Rizzo writes: > > > Is if_tx_rdy() something that can be used generally or does it only > > > work with dummynet ? > > > > well, the function is dummynet-specific, but I would certainly like > > a generic callback list to be implemented in ifnet which is > > invoked on tx_empty events. > > Me too :-) > > > The problem as usual is that you have to touch every single device > > driver... Fortunately we can leave the ifnet structure unmodified > > because i just discovered there is an ifindex2ifnet array which is > > managed and can be extended to point to additional ifnet state that > > does not fit in the immutable one... > > Why is it important to avoid changing 'struct ifnet' ? To maintain binary compatability for commercial network drivers. Currently, network driver modules built on 4.1.1 work on all versions of FreeBSD through 4.5-STABLE. Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-net" in the body of the message