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Bug #1554
closedrbd rollback does not work with a snapshot of an empty image
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Description
Found this when testing python bindings for librbd. If you
1. create an rbd image
2. create a snapshot
3. write to the image
4. rollback to the snapshot
When you read the image again, you'll get the newly written data instead of zeroes, which is what the image contained when you snapshotted it.
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