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Alex Elder authored
When a snapshot context update occurs, rbd_update_mapping_size() is called to set the capacity of the disk to record the updated size of the image in case it has changed. There's a bug though. The mapping size is in units of *bytes*. The code that updates the mapping size field is assigning a value that has been scaled down to *sectors*. Fix that. Also, check to see if the size has actually changed, and don't bother updating things (specifically, calling set_capacity()) if it has not. This resolves: http://tracker.ceph.com/issues/4833Signed-off-by:
Alex Elder <elder@inktank.com> Reviewed-by:
Josh Durgin <josh.durgin@inktank.com>
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