xfs_db: convert rtsummary geometry

Add two rtsummary related conversion routines to rtconvert:

Convert a rtbitmap file block number and free extent log length to a
file block number and info word offset within the rt summary file;

Convert a free extent log length, summary info word offset, and summary
file block number to a file block number within the rt bitmap file.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2 files changed