Date: Fri, 17 Feb 2012 07:48:35 -0800 From: Marcel Moolenaar <marcel@xcllnt.net> To: Gleb Smirnoff <glebius@FreeBSD.org> Cc: net@FreeBSD.org Subject: Re: Abstracting struct ifnet Message-ID: <E23BCF0B-1C2F-4767-B2C5-ADAC62AEE7AF@xcllnt.net> In-Reply-To: <20120217135320.GJ55075@FreeBSD.org> References: <338757D1-6B1E-49CF-983F-5D5851066FD3@xcllnt.net> <20120217135320.GJ55075@FreeBSD.org>
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On Feb 17, 2012, at 5:53 AM, Gleb Smirnoff wrote: > M> Thoughts, feedback and suggestion are welcome, > > Is it possible to make the structure the driver points to opaque? > > Once made, that would allow us to hack on the ifnet (or on its > successor - iflogical) more aggressively without breaking ABI/API. Yes, that's the idea. Backward compatibility kinda conflicts with making struct ifnet entirely abstract, but I don't see that as a problem without solution. Only as a problem for which an acceptable solution must be found. For example: you can introduce a define that either old or new drivers use to indicate whether they need full visibility or whether an abstract type works. This then drives what is defined/declared and how it's defined/declared. -- Marcel Moolenaar marcel@xcllnt.net
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