[ceph-users] Re: report librbd bug export-diff

Hello dillaman: Problem: create a clone from a parent image, create a snapshot on the clone, when I use command "rbd export-diff <pool>/clone@snap <file> --whole-object", it can't diff parent image data. But I use this command without "--whole-object", it is ok. steps: 1、rbd create volumes/test1 -s 1G 2、write data to volumes/test1 (offset=0, len=8388608) 3、rbd snap create volumes/test1@snap 4、rbd snap protect volumes/test1@snap 5、rbd clone volumes/test1@snap volumes/clone1 6、write data to volumes/clone1 (offset=16777216, len=4194304) 7、rbd snap create volumes/clone1@snap1 8、rbd export-diff volumes/clone1@snap1 /root/diff1 --whole-object It only diffs data [16777216L, 20971520L] 9、rbd export-diff volumes/clone1@snap1 /root/diff2 It is ok and can diffs data [0L, 8388608L], [16777216L, 20971520L] If you confirm that this is a bug or fix it, please let me know, thank you very much.

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