From owner-freebsd-fs  Wed Aug  7 22:54:37 2002
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Date: Wed, 7 Aug 2002 22:54:33 -0700
From: Alfred Perlstein <bright@mu.org>
To: Scott Long <scott_long@btc.adaptec.com>
Cc: Kelly Yancey <kbyanc@posi.net>,
	Terry Lambert <tlambert2@mindspring.com>,
	"David E. Cross" <crossd@cs.rpi.edu>, fs@freebsd.org,
	guptar@cs.rpi.edu
Subject: Re: vnodes (UFS journaling)?
Message-ID: <20020808055433.GG10953@elvis.mu.org>
References: <3D51BE6F.298F0AF@mindspring.com> <20020807214625.C667-100000@gateway.posi.net> <20020808052109.GC47545@hollin.btc.adaptec.com>
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* Scott Long <scott_long@btc.adaptec.com> [020807 22:25] wrote:
> 
> I'll chime in and say that, as much as it pains me to admit, Terry is
> right =-).  Manipualting the journal file from the vnode layer is
> the wrong way to go about this.  However, if you want to push forward
> in a quick-n-dirty manner right now, you could probably hack up
> ufs_lookup() to not return a vnode for the journal file.   Then you
> can keep your reference on the vnode and not worry about contention.

This is incorrect.  UFS snapshots return vnodes for the snapshot
files, it's just that the UFS code makes sure no one can write to
these special files.

To all those involved, if you want to help, please UTSL before
leading people astray. :(

-Alfred

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