block: bdrv_aligned_pwritev: Assert overlap range
This adds assertions that the request that we actually end up passing to the block driver (which includes RMW data and has therefore potentially been rounded to alignment boundaries) is fully covered by the overlap_{offset,size} fields of the associated BdrvTrackedRequest. Suggested-by: NLaszlo Ersek <lersek@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com> Reviewed-by: NEric Blake <eblake@redhat.com> Reviewed-by: NLaszlo Ersek <lersek@redhat.com>
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