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Re: [RFT,PATCH] Move embedding to appropriate partmap files

From: Robert Millan
Subject: Re: [RFT,PATCH] Move embedding to appropriate partmap files
Date: Fri, 16 Oct 2009 23:07:22 +0200
User-agent: Mutt/1.5.18 (2008-05-17)

On Fri, Oct 16, 2009 at 12:58:42PM +0200, Vladimir 'phcoder' Serbinenko wrote:
> Robert Millan wrote:
> > On Thu, Aug 13, 2009 at 10:53:23PM +0200, Vladimir 'phcoder' Serbinenko 
> > wrote:
> >   
> >>>> We may want to embed more in the future. Actually I think it's not
> >>>> ad-hoc. Basically partition map defines a function which gives back
> >>>> the sectors available for embedding.
> >>>>         
> >>> Is embedding useful elsewhere?
> >>>       
> >> Yes. Consider a world of checksummed filesystems. In such world you
> >> can't change the contents of the file by just writing to its blocklist
> >> since it will break the checksum. Similar problems exist with RAIDs
> >> and LVMs. On some systems we can't put grub-env in a file. For these
> >> cases we can embed grub-env somewhere where we can write it with ease
> >>     
> >
> > Ok.  Feel free to use partmap/ then.  But please make sure #ifdefs only
> > enable those functions where they are going to be used.  That'd be
> > GRUB_MACHINE_PCBIOS for now, if later code in other ports relies on them,
> > this can be changed.
> >
> >   
> This patch fixes an important bug - namely overwriting extended
> partition tables

Is there a simpler way to resolve this?  I don't object to the
restructuring you propose, but it seems too intrusive to do this
just a few hours before we release 1.97.

Robert Millan

  The DRM opt-in fallacy: "Your data belongs to us. We will decide when (and
  how) you may access your data; but nobody's threatening your freedom: we
  still allow you to remove your data and not access it at all."

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