Re: [Qemu-devel] [PATCH v3 0/4] Initial VHDX support

[Stefan Hajnoczi <stefanha@gmail.com>]

On Mon, Apr 29, 2013 at 02:48:15PM -0400, Jeff Cody wrote:
> 
> Differences from v2:
> 
> 
> Patch 2/4:  changed 2 uint8_t[16] to MSGUID (Kevin)
>             renamed all strucs to proper style (Kevin)
>             indentations / style (Kevin)
>             Removed/fixed outdated comments (Stefan)
>             dropped vhdx_header_padded (Kevin)            
>             
> Patch 3/4:  removed hunk that was meant for old patch 5/5 (Fam)
>             check VHDX header version field (Fam)
>             validate file type id in open and not just probe (Kevin)
>             allow headers with seq # of 0 if other header is invalid (Kevin)
>             fixed masking typo for parent meta present (Kevin)
>             removed error check for 512-byte sectors (Kevin)
>             verify region and metadata table guid are unique (Kevin)
>             removed signed/unsigned comparisons (Stefan)
>             sanity checking on rt.entry_count (Stefan)
>             use clz_() instead of inline code (Stefan)
>             bat_rt.length sanity check - compute it rather
>                than trust the entry length (Stefan)
> 
> Patch 5 (v2): Dropped
> 
> This adds the initial support for VHDX image files.  
> 
> It currently only supports read operations of VHDX, for fixed and dynamic files.
> 
> Notably, the following is not yet supported:
>     * Differencing files
>     * Log replay (so we will refuse to open any images that are not 'clean')
>     * .bdrv_create()
>     * write operations other than to the header
> 
> 
> Jeff Cody (4):
>   qemu: add castagnoli crc32c checksum algorithm
>   block: vhdx header for the QEMU support of VHDX images
>   block: initial VHDX driver support framework - supports open and probe
>   block: add read-only support to VHDX image format.
> 
>  block/Makefile.objs   |   1 +
>  block/vhdx.c          | 972 ++++++++++++++++++++++++++++++++++++++++++++++++++
>  block/vhdx.h          | 325 +++++++++++++++++
>  include/qemu/crc32c.h |  35 ++
>  util/Makefile.objs    |   1 +
>  util/crc32c.c         | 115 ++++++
>  6 files changed, 1449 insertions(+)
>  create mode 100644 block/vhdx.c
>  create mode 100644 block/vhdx.h
>  create mode 100644 include/qemu/crc32c.h
>  create mode 100644 util/crc32c.c

Do you have links to vhdx files I can test?

Thanks, applied to my block tree:
https://github.com/stefanha/qemu/commits/block

Stefan