• The protocol_name "file" was added to the block driver when async IO was
    introduced.  This can be used to select that a file is treated as a raw
    device instead of probing for the type.  However, protocols are not subject
    to path interpretation which cases qcow2 images with raw base images to not
    function is the path was specified relatively.
    
    The fix is simply to remove the protocol_name from the raw block driver.  The
    proper way to force the use of a raw block format is to use the format= option
    with -drive.
    
    Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
    
    
    
    git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5233 c046a42c-6fe2-441c-8c8c-71466251a162
    aliguori authored
     
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