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![Darrick J. Wong](https://secure.gravatar.com/avatar/adf7ddc62e9e4818594d54e4fe7adbb3.jpg?s=96&d=mm)
Darrick J. Wong committed 1946b91cee4
xfs: define the on-disk refcount btree format Start constructing the refcount btree implementation by establishing the on-disk format and everything needed to read, write, and manipulate the refcount btree blocks. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Christoph Hellwig <hch@lst.de>