tree ab3083179c621c3e8d0be3980aaed96528f90599
parent 293b2f70b4a16a1ca91efd28ef3d6634262c6887
author Tao Ma <tao.ma@oracle.com> 1251251248 +0800
committer Joel Becker <joel.becker@oracle.com> 1253675378 -0700

ocfs2: CoW a reflinked cluster when it is truncated.

When we truncate a file to a specific size which resides in a reflinked
cluster, we need to CoW it since ocfs2_zero_range_for_truncate will
zero the space after the size(just another type of write).

So we add a "max_cpos" in ocfs2_refcount_cow so that it will stop when
it hit the max cluster offset.

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