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Re: to compare journalised file systems

To: linux-xfs@xxxxxxxxxxx
Subject: Re: to compare journalised file systems
From: Ivan Rayner <ivanr@xxxxxxx>
Date: Thu, 17 Oct 2002 10:59:57 +1000
In-reply-to: <20021016221524.GM27982@xxxxxxxxxxxxxxx>
Organization: SGI
References: <20021016085626.GB27982@xxxxxxxxxxxxxxx> <Pine.LNX.4.44.0210160549420.966-100000@xxxxxxxxxxxxxxxxxxxxxx> <20021016203853.GH27982@xxxxxxxxxxxxxxx> <20021016232652.A14553@xxxxxxxxxxxxx> <20021016215043.GJ27982@xxxxxxxxxxxxxxx> <20021017000400.B21179@xxxxxxxxxxxxx> <20021016221524.GM27982@xxxxxxxxxxxxxxx>
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On Wed, 16 Oct 2002 14:15:24 -0800, Ethan Benson wrote:

> On Thu, Oct 17, 2002 at 12:04:00AM +0200, Andi Kleen wrote:
> > > xfs already honors an extended attribute for files only, the
> > > maintainers believe that honoring such a thing for directories is
> > > evil.
> > 
> > If 'the maintainers' really said such a thing then I disagree with
> > the maintainers. Honoring it for directories should be fine and I
> > can think of applications for it.
> 
> fine look up the list archives if you don't believe me.  when the
> change was first commited Ivan used the word evil specifically when
> referring to nodump on dirs.  there was a more detailed discussion a
> few monthes later, thier concern appears primarily security.

By the "maintainers" you mean me, since I was the one that implemented
it.

I don't remember using the word 'evil' -- obviously I was just
grandstanding.

It wasn't done for directories for 2 main reasons, that I recall:

1. Security.  I didn't like the idea of the owner of a directory
   deciding whether files, that might be hidden in the depths of
   a directory tree and could be owned by others, get dumped or
   not.  To allow this would be ... evil! :)

2. Simplicity and performance.  To expand this for directories in
   xfsdump would mean a fair bit more work (which would not have
   been approved as a project), and probably a real performance
   hit during dump processing.


Ivan
-- 
Ivan Rayner
ivanr@xxxxxxx


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