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H A Dextent_map.hdiff e73a819db9c2d6c4065b7cab7374709b6939e8f1 Tue Aug 11 08:33:14 CEST 2009 Tao Ma <tao.ma@oracle.com> ocfs2: Add support for incrementing refcount in the tree.

Given a physical cpos and length, increment the refcount
in the tree. If the extent has not been seen before, a refcount
record is created for it. Refcount records may be merged or
split by this operation.

Signed-off-by: Tao Ma <tao.ma@oracle.com>