What were you trying to do that didn't work?

Create file image with rbd data file failed by qemu-img

Please provide the package NVR for which the bug is seen:

libvirt-10.10.0-1.el10.x86_64
qemu-kvm-9.1.0-7.el10.x86_64

How reproducible is this bug?:

100%

Steps to reproduce

1.Prepare a rbd server with pool/image.
[rbd server]# docker exec mon rbd ls virtual-disk-ceph-pool
datastore_rbd.qcow2

2. Create file image by using the above pool/image as the data file.

# qemu-img create -f qcow2 -o data_file=rbd:virtual-disk-ceph-pool/datastore_rbd.qcow2@<ceph_mon> /var/lib/libvirt/images/datastore_rbd.qcow2 500M
Formatting '/var/lib/libvirt/images/datastore_rbd.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=524288000 data_file=rbd:virtual-disk-ceph-pool/datastore_rbd.qcow2@<ceph_mon> lazy_refcounts=off refcount_bits=16
qemu-img: /var/lib/libvirt/images/datastore_rbd.qcow2: error rbd create: File exists

# ll /var/lib/libvirt/images/datastore_rbd.qcow2
ls: cannot access '/var/lib/libvirt/images/datastore_rbd.qcow2': No such file or directory

3. Delete the pool/image in rbd server and try again.
[rbd server]# docker exec mon rbd rm virtual-disk-ceph-pool/datastore_rbd.qcow2
Removing image: 100% complete...done.

# qemu-img create -f qcow2 -o data_file=rbd:virtual-disk-ceph-pool/datastore_rbd.qcow2@<ceph_mon> /var/lib/libvirt/images/datastore_rbd.qcow2 500M
Formatting '/var/lib/libvirt/images/datastore_rbd.qcow2', fmt=qcow2 cluster_size=65536 extended_l2=off compression_type=zlib size=524288000 data_file=rbd:virtual-disk-ceph-pool/datastore_rbd.qcow2@<ceph_mon> lazy_refcounts=off refcount_bits=16
qemu-img: /var/lib/libvirt/images/datastore_rbd.qcow2: error reading header from test_datafile.img: No such file or directory

Expected results

Create successfully.

Actual results

Create failed.

Additional info:
The nbd/rbd network related data file test scenarios in libvirt are low priority.