From mboxrd@z Thu Jan  1 00:00:00 1970
Message-ID: <f158dc670706301115t729d89edu9f8201598b25757a@mail.gmail.com>
Date: Sat, 30 Jun 2007 11:15:45 -0700
From: "Latchesar Ionkov" <lucho@gmx.net>
To: "Fans of the OS Plan 9 from Bell Labs" <9fans@cse.psu.edu>
Subject: Re: [9fans] What do I need for a small 9P2000 server @ Linux ?
In-Reply-To: <20070630174553.GT28917@kris.home>
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On 6/30/07, Kris Maglione <bsdaemon@comcast.net> wrote:
> On Sat, Jun 30, 2007 at 07:39:12PM +0200, Enrico Weigelt wrote:
> >I'm not sure if spfs sends this zero or libixp doesn't decode it.
> >With npfs I've got the same problem.
>
> spfs sends it. styxmon has nothing to do with libixp.
>
> >But it's interesting that the Linux 9p driver doesn't have any
> >problem w/ spfs or npfs. No idea if it does an similar hack as mine.
>
> lib9pclient ignores the iounit entirely. npfs does this, which
> is nowhere in the spec, and thus confuses me:
>
>         fid->iounit = rc->iounit;
>         if (!fid->iounit || fid->iounit>fid->fsys->msize-IOHDRSZ)
>                 fid->iounit = fid->fsys->msize-IOHDRSZ;

If the client gets iounit equal to zero, it has to pick a
greater-than-zero number. msize - IOHDRSZ is the maximum number of
bytes that can be read/written with a single message.

    Lucho