Description of problem:
I have been unable to use this to update a disk quota. The quota attribute is located in /disks, not /disk_attachments.

Example:
curl -v -u "user@server:password" -H "Content-type: application/xml" -data "<disk_attachment><quota id='ccc'/></disk_attachment>" 'https://serverName/ovirt-engine/api/vms/xxx/diskattachments/bbb'

This returns invalid while attempting to update the disk directly:
curl -v -u "user@server:password" -H "Content-type: application/xml" -data "<diskt><quota id='ccc'/></disk>" 'https://serverName/ovirt-engine/api/disks/xxx'

returns the error message:
"<fault>
    <detail>Updating disk attributes other than QCOW version is permitted only for disk-attachments, which reside under VMs.</detail>
    <reason>Operation Failed</reason>
</fault>"

Is disk quota updating via the API no longer supported?

Version-Release number of selected component (if applicable):


How reproducible:
100%

Steps to Reproduce:
1. Use curl or some sdk package (like python) to update disk quota via API

Actual results:
Error message or operation failed.

Expected results:
Disk quota updated on a valid, powered-down VM.

Additional info: