QA output created by 327
Format and mount
Create the original files
root      --       0       0       0              4     0     0       
fsgqa     --    2048       0       0              2     0     0       
Set hard quota to prevent third reflink
root      --       0       0       0              4     0     0       
fsgqa     +-    2048       0    1024              2     0     0       
Try to reflink again
cp: failed to clone 'SCRATCH_MNT/test-327/file3' from 'SCRATCH_MNT/test-327/file1': Disk quota exceeded
root      --       0       0       0              4     0     0       
fsgqa     +-    2048       0    1024              3     0     0