[9fans] Re: etherelnk3.c

[jim mckie jmk@plan9.bell-labs.com]

actually, it's easier. you can turn a Block-based driver into
a filesystem driver with a handful of #defines, two trivial functions
and a couple of #ifdefs (i know, we don't actually approve of that).
#ifdefs are only necessary because Blocks use read and write pointers
and Msgbufs use a base and count.

--jim

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>From cse.psu.edu!owner-9fans Mon Dec 15 13:30:30 EST 1997
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Date: Mon, 15 Dec 1997 12:14:33 -0600
From: "G. David Butler" <dbSystems.com!gdb>
Message-Id: <199712151814.MAA16085@ns.dbSystems.com>
To: cse.psu.edu!9fans
Subject: Re: [9fans] Re: etherelnk3.c
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>From: eld@jewel.ucsd.edu (Eric Dorman)
>> From: "G. David Butler" <gdb@dbSystems.com>
>> To: 9fans@cse.psu.edu
>> Subject: [9fans] Re: etherelnk3.c
>> 
>  Another thing to consider is how these changes would affect
>the integration of ether drivers between the fs and terminal code.
>Integrating these two trees first allieviates a whole mess of 
>existing problems and ensures that this type of effort won't 
>have to be done again (perhaps differently, even) for fs.

In fact the problem becomes worse since Blocks don't exist
in the fs.  There we would have to use Msgbufs.