[Qemu-devel] [PATCH v3 0/7] parallels format support improvements

["Denis V. Lunev" <den@openvz.org>]

The patchset implements additional compatibility bits for Parallels
format:
- initial support of parsing of Parallels DiskDeskriptor.xml
  Typically Parallels disk bundle consists of several images which are
  glued by XML disk descriptor. Also XML hides inside several important
  parameters which are not available in the image header.
- support for padded Parallels images.
  For the time being Parallels was created an optimization for such OSes
  in its desktop product. Desktop users are not qualified enough to create
  properly aligned installations. Thus Parallels makes a blind guess
  on a customer behalf and creates so-called "padded" images if guest
  OS type is specified as WinXP, Win2k and Win2k3.

The code uses approach from VMDK support, either image or XML descriptor
could be used. Though there is temporary hack in the opening code:
BlockDriverState->file is being reopened inside parallels_open. I prefer
to keep this code in this state till proper Parallels snapshots support
in order to minimize current changes.

Changes from v2:
- (patch 1) changed libxml2 addition as suggested by Michael Tokarev
- (patch 2) changed API of xml_find/xml_get_text to avoid memcpy to variable
  on stack
- (patch 2) dropped predefined value for PARALLELS_XML/PARALLELS_IMAGE
- (patch 2) other minor changes (spelling, placement)
- (patch 3) quoted TEST_IMG as suggested by Jeff Cody
- (patches 4, 6) quoted TEST_IMG as suggested by Jeff Cody

Changes from v1:
- dropped already merged part (original patches 1-3)

CC: Jeff Cody <jcody@redhat.com>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Stefan Hajnoczi <stefanha@redhat.com>
CC: Roman Kagan <rkagan@parallels.com>
CC: Denis V. Lunev <den@openvz.org>