Note: This bug is displayed in read-only format because
the product is no longer active in Red Hat Bugzilla.
RHEL Engineering is moving the tracking of its product development work on RHEL 6 through RHEL 9 to Red Hat Jira (issues.redhat.com). If you're a Red Hat customer, please continue to file support cases via the Red Hat customer portal. If you're not, please head to the "RHEL project" in Red Hat Jira and file new tickets here. Individual Bugzilla bugs in the statuses "NEW", "ASSIGNED", and "POST" are being migrated throughout September 2023. Bugs of Red Hat partners with an assigned Engineering Partner Manager (EPM) are migrated in late September as per pre-agreed dates. Bugs against components "kernel", "kernel-rt", and "kpatch" are only migrated if still in "NEW" or "ASSIGNED". If you cannot log in to RH Jira, please consult article #7032570. That failing, please send an e-mail to the RH Jira admins at rh-issues@redhat.com to troubleshoot your issue as a user management inquiry. The email creates a ServiceNow ticket with Red Hat. Individual Bugzilla bugs that are migrated will be moved to status "CLOSED", resolution "MIGRATED", and set with "MigratedToJIRA" in "Keywords". The link to the successor Jira issue will be found under "Links", have a little "two-footprint" icon next to it, and direct you to the "RHEL project" in Red Hat Jira (issue links are of type "https://issues.redhat.com/browse/RHEL-XXXX", where "X" is a digit). This same link will be available in a blue banner at the top of the page informing you that that bug has been migrated.
Description of problem:
the volume data should be erased, but can not change its format.
Version-Release number of selected component (if applicable):
libvirt-0.9.4-6.el6.x86_64
How reproducible:
always
Steps to Reproduce:
# qemu-img info /var/lib/libvirt/images/rhel6.img
image: /var/lib/libvirt/images/rhel6.img
file format: qcow2
virtual size: 512K (524288 bytes)
disk size: 392K
cluster_size: 65536
# virsh vol-wipe rhel6.img --pool default
Vol rhel6.img wiped
# qemu-img info /var/lib/libvirt/images/rhel6.img
image: /var/lib/libvirt/images/rhel6.img
file format: raw
virtual size: 512K (524288 bytes)
disk size: 0
Actual results:
Be changed from qcow2 to raw format after volume wiped.
Expected results:
Should be kept qcow2 format after volume wiped.
Additional info:
Since wiping the volume destroys all the data in it, the volume is raw because the qcow metadata has been removed. This is behavior by design, so I am closing as NOTABUG.
IMHO this is a bug, not an RFE.
Wiping a volume should only be wiping the data, not the file format info. The problem is that the current code is not paying attention to the file format when wiping data, it just blindly truncates the file to zero bytes. For non-raw formats, we should run 'qemu-img create' again after truncation to ensure the original file format structure is preserved.