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Eric Sandeen
298319fd4a
generic/564 wants to test for copy_range -f, but as it's implemented it calls copy_range with a length of zero which will silently return success from the VFS (at least on some kernels) even if the underlying fs doesn't support it. So patch this up 2 ways; perform the test with an explicit length so it's not a no-op, and go ahead test copy_range w/o -f in the test first just to be on the safe side (and for clearer failure messages.) Signed-off-by: Eric Sandeen <sandeen@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Eryu Guan <guaneryu@gmail.com>