xfs: add scrub cross-referencing helpers for the rmap btrees

Add a couple of functions to the rmap btrees that will be used
to cross-reference metadata against the rmapbt.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-01-16 18:52:13 -08:00
commit ed7c52d4bf
2 changed files with 72 additions and 0 deletions