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To: Eno Thereska <eno@andrew.cmu.edu>
From: "Poul-Henning Kamp" <phk@phk.freebsd.dk>
In-Reply-To: Your message of "Sun, 03 Aug 2003 19:11:39 EDT."
             <3F2D96AB.9000607@andrew.cmu.edu> 
Date: Mon, 04 Aug 2003 07:43:44 +0200
Message-ID: <10994.1059975824@critter.freebsd.dk>
cc: freebsd hackers <freebsd-hackers@freebsd.org>
Subject: Re: getting from bio to buf in dastrategy() 
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In message <3F2D96AB.9000607@andrew.cmu.edu>, Eno Thereska writes:
>Hi all,
>
>I am hacking into the FreeBSD 5.0 code.
>I jumped from using 4.4 to 5.0 and a couple of things
>have changed. Here is my question:
>
>in /sys/cam/scsi/scsi_da.c the dastrategy()
>function takes as an argument "struct bio* bp"
>Now I need to get to the "struct *buf" that bp
>belongs to.

You can't do that, there may not be any struct buf.

-- 
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.