Don't open code grabbing the block size; just use the helper.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Fix the calculation of the dmhuge size. The previous calculation
tried to calculate the size correctly, but got it wrong for 1k block
sizes. Therefore, clean the whole mess up.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Don't open-code _notrun checks for the rmapbt, just use the helper.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Make sure that we can handle multiple bmbt records mapping to a
single rmapbt record. This can happen if you fallocate more than
2^21 contiguous blocks to a file.
(Also add some helpers that can create huge devices with some
dm-zero and dm-snapshot fakery.)
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Eryu Guan <eguan@redhat.com>
Darrick J. Wong