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Re: [PATCH] nested partitions

From: Vladimir 'phcoder' Serbinenko
Subject: Re: [PATCH] nested partitions
Date: Mon, 3 Aug 2009 00:44:37 +0200

On Mon, Aug 3, 2009 at 12:25 AM, Robert Millan<address@hidden> wrote:
> On Mon, Aug 03, 2009 at 12:09:32AM +0200, Vladimir 'phcoder' Serbinenko wrote:
>> >> +      grub_device_close (dev);
>> >
>> > I don't think we should allow chainload at all in partitions other than 
>> > msdos
>> > ones.  There's no existing use of this for other labels "in the wild", and 
>> > we
>> > shouldn't encourage it to appear IMO.
>> Actually it's something which happens with GPT. Suppose you have an OS
>> on your GPT which has no multiboot support. In this case you use
>> gptsync to create a fake msdos partition map and boot your OS.
> So gpt could be the other exception because it is backward compatible with
> msdos labels (to some extent).
> But please let's not make a general rule out of this.  The chainloader is
> an implementation of the DOS MBR<->PBR boot protocol, which has been mimicked
> by others but is still only available on msdos labels.  If someone tries it
> on another partition label type, she should see an error.
> Btw, does this bugfix depend on the rest of nested partition changes?
Actually only superficially
> +           disk->partition = p->parent;
this line would be = 0; without nestpart patch. If you want I can
commit it separately.

The following line is bogus:
> +       /* In i386-pc, the id is equal to the BIOS drive number.  */
> +       drive = (int) disk->id;
It shouldn't have been here at all - it was written before
introduction of biosnum. I won't resend the patch because of this but
I corrected it in my local git
> --
> 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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Vladimir 'phcoder' Serbinenko

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