[Bug 1808928] Re: Bitmap Extra data is not supported

[John Snow]

Sorry, that formatted *terribly*... please see the attachment for a raw
text version with arbitrarily long columns that looks nicer. :(

** Attachment added: "Raw text for comment #7 with better formatting (?)"
   
https://bugs.launchpad.net/qemu/+bug/1808928/+attachment/5490362/+files/bztemp

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https://bugs.launchpad.net/bugs/1808928

Title:
  Bitmap Extra data is not supported

Status in QEMU:
  Incomplete

Bug description:
  i am using dirty bitmaps and drive-backup. It works as aspected.

  Lately, i encounter a disastrous error. There is not any information
  about that situation. I cannot reach/open/attach/info or anything with
  a qcow2 file.

  virsh version
  Compiled against library: libvirt 4.10.0
  Using library: libvirt 4.10.0
  Using API: QEMU 4.10.0
  Running hypervisor: QEMU 2.12.0

  "qemu-img: Could not open '/var/lib/libvirt/images/test.qcow2': Bitmap
  extra data is not supported"

  what is that mean? what should i do?
  i cannot remove bitmap. i cannot open image or query.

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