block/vpc: Use the correct max sector count for VHD images
The old VHD_MAX_SECTORS value is incorrect, and is a throwback to the CHS calculations. The VHD specification allows images up to 2040 GiB, which (using 512 byte sectors) corresponds to a maximum number of sectors of 0xff000000, rather than the old value of 0xfe0001ff. Update VHD_MAX_SECTORS to reflect the correct value. Also, update comment references to the actual size limit, and correct one compare so that we can have sizes up to the limit. Signed-off-by: NJeff Cody <jcody@redhat.com> Reviewed-by: NStefan Hajnoczi <stefanha@redhat.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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