tree 8b421e59d4ebc171b0d7038d957cfd2b824c8db3
parent 4ed3f68792f6a9c21a290ae777565e7562a09653
author Darrick J. Wong <darrick.wong@oracle.com> 1474244720 +1000
committer Dave Chinner <david@fromorbit.com> 1474244720 +1000

xfs: count the blocks in a btree

Provide a helper method to count the number of blocks in a short form
btree.  The refcount and rmap btrees need to know the number of blocks
already in use to set up their per-AG block reservations during mount.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>