xfs_repair: try to correct sb_unit value from secondaries

If the primary superblock's sb_unit leads to a rootino calculation that
doesn't match sb_rootino /but/ we can find a secondary superblock whose
sb_unit does match, fix the primary.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
2 files changed