Bug List: (2 of 2)
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Bug 1954510 - [incremental_backup] bitmap lost when do blockcopy
Summary: [incremental_backup] bitmap lost when do blockcopy
Keywords:
Status: CLOSED DUPLICATE of bug 1953939
Alias: None
Product: Red Hat Enterprise Linux 9
Classification: Red Hat
Component: libvirt
Version: 9.0
Hardware: x86_64
OS: Linux
unspecified
medium
Target Milestone: beta
: ---
Assignee: Virtualization Maintenance
QA Contact: yisun
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2021-04-28 10:07 UTC by yisun
Modified: 2021-04-28 10:28 UTC (History)
2 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Environment:
Last Closed: 2021-04-28 10:28:43 UTC
Type: Bug
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)

Description yisun 2021-04-28 10:07:12 UTC 
Description:
[incremental_backup] bitmap lost when do blockcopy

Reproduced Versions:
libvirt-7.0.0-6.el9.x86_64
qemu-kvm-5.2.0-16.el9.x86_64

NOT REPRODUCED VERSIONS:
libvirt-7.0.0-13.module+el8.4.0+10604+5608c2b4.x86_64
qemu-kvm-5.2.0-15.module+el8.4.0+10650+50781ca0.x86_64

Reproducibility:
100%

Steps:
1. have a running vm
(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# virsh start avocado-vt-vm1
Domain 'avocado-vt-vm1' started

(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# virsh domblklist avocado-vt-vm1
 Target   Source
------------------------------------------------------------------------
 vda      /var/lib/avocado/data/avocado-vt/images/jeos-27-x86_64.qcow2

2. create a checkpoint on this vm's vda
(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# virsh checkpoint-create-as avocado-vt-vm1 ck1
Domain checkpoint ck1 created

3. block copy vda to /var/tmp/copy_dest.qcow2
(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# virsh blockcopy avocado-vt-vm1 vda /var/tmp/copy_dest.qcow2 --wait --verbose --transient-job --pivot
Block Copy: [100 %]
Successfully pivoted

4. try to delete the checkpoint created in step 2, failure happens
(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# virsh checkpoint-delete avocado-vt-vm1 ck1
error: Failed to delete checkpoint ck1
error: internal error: bitmap 'ck1' not found in backing chain of 'vda'

5. check the copy_dest.qcow2 with 'qemu-img info', no bitmap exists
(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# virsh destroy avocado-vt-vm1
Domain 'avocado-vt-vm1' destroyed

(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# qemu-img info /var/tmp/copy_dest.qcow2
image: /var/tmp/copy_dest.qcow2
file format: qcow2
virtual size: 10 GiB (10737418240 bytes)
disk size: 1.94 GiB
cluster_size: 65536
Format specific information:
    compat: 1.1
    compression type: zlib
    lazy refcounts: false
    refcount bits: 16
    corrupt: false
    extended l2: false

as comparison, the bitmap exists in original image
(.libvirt-ci-venv-ci-runtest-vUJ1lU) [root@dell-per740-38 ~]# qemu-img info /var/lib/avocado/data/avocado-vt/images/jeos-27-x86_64.qcow2
image: /var/lib/avocado/data/avocado-vt/images/jeos-27-x86_64.qcow2
file format: qcow2
virtual size: 10 GiB (10737418240 bytes)
disk size: 997 MiB
cluster_size: 65536
Format specific information:
    compat: 1.1
    compression type: zlib
    lazy refcounts: false
    bitmaps:
        [0]:
            flags:
                [0]: auto
            name: ck1
            granularity: 65536
    refcount bits: 16
    corrupt: false
    extended l2: false
Comment 2 Peter Krempa 2021-04-28 10:28:43 UTC 
Backups are not enabled and require qemu support for blockdev-reopen. Closing this as duplicate of the original bug report.

*** This bug has been marked as a duplicate of bug 1953939 ***
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Bug List: (2 of 2)