xfs: count the blocks in a btree
authorDarrick J. Wong <darrick.wong@oracle.com>
Mon, 19 Sep 2016 00:25:20 +0000 (10:25 +1000)
committerDave Chinner <david@fromorbit.com>
Mon, 19 Sep 2016 00:25:20 +0000 (10:25 +1000)
commitc611cc0360cd924448c23ccd70ce8be703fcb4a6
tree8b421e59d4ebc171b0d7038d957cfd2b824c8db3
parent4ed3f68792f6a9c21a290ae777565e7562a09653
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>
fs/xfs/libxfs/xfs_btree.c
fs/xfs/libxfs/xfs_btree.h