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block: vhdx - add region overlap detection for image files
Regions in the image file cannot overlap - the log, region tables, and metdata must all be unique and non-overlapping. This adds region checking by means of a QLIST; there can be a variable number of regions and metadata (there may be metadata or region tables that we do not recognize / know about, but are not required). This adds the capability to register a region for later checking, and to check against registered regions for any overlap. Also, if neither the BAT or Metadata region tables are found, return error. Signed-off-by: Jeff Cody <jcody@redhat.com> Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
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