xfs: count the blocks in a btree

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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>

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Darrick J. Wong 2016-09-19 10:25:20 +10:00 • committed by Dave Chinner

parent 4ed3f68792

commit c611cc0360

2 changed files with 25 additions and 0 deletions

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23

fs/xfs/libxfs/xfs_btree.c

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2

fs/xfs/libxfs/xfs_btree.h

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