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Date: Mon, 5 Aug 2013 17:05:36 +0200
From: Kevin Wolf <kwolf@redhat.com>
Message-ID: <20130805150536.GK2654@dhcp-200-207.str.redhat.com>
References: <cover.1375325971.git.jcody@redhat.com>
	<595d71cf1cd25ac9deff521bceb82b8c3da888d0.1375325971.git.jcody@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH v2 2/9] block: vhdx - add header update
	capability.
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To: Jeff Cody <jcody@redhat.com>
Cc: famz@redhat.com, qemu-devel@nongnu.org, stefanha@redhat.com

Am 01.08.2013 um 05:23 hat Jeff Cody geschrieben:
> This adds the ability to update the headers in a VHDX image, including
> generating a new MS-compatible GUID.
> 
> As VHDX depends on uuid.h, VHDX is now a configurable build option.  If
> VHDX support is enabled, that will also enable uuid as well.  The
> default is to have VHDX enabled.
> 
> To enable/disable VHDX:  --enable-vhdx, --disable-vhdx
> 
> Signed-off-by: Jeff Cody <jcody@redhat.com>

I knew I'd forget to mention something I had seen...

> +    /* overwrite the actual VHDXHeader portion */
> +    memcpy(buffer, inactive_header, sizeof(VHDXHeader));
> +    inactive_header->checksum = vhdx_update_checksum(buffer,
> +                                                     VHDX_HEADER_SIZE, 4);

This I would prefer as offsetof(VHDXHeader, checksum) instead of a magic
number 4.

Kevin