Created attachment 951367 [details]
engine and vdsm logs

Description of problem:
Have a RHEL 6.6 host deployed on my hosted-engine setup. Live snapshot creation is blocked because the the host's qemu doesn't support live snapshot, That's OK.
But when trying to live migrate a disk using this host, the operation is allowed.

Version-Release number of selected component (if applicable):
rhev3.5 vt7
RHEL6.6 host
rhevm-3.5.0-0.17.beta.el6ev.noarch
libvirt-0.10.2-46.el6.x86_64
qemu-kvm-rhev-0.12.1.2-2.448.el6.x86_64

How reproducible:
Always

Steps to Reproduce:
On a setup with a DC with more than 1 storage domaim from the same type (block/file)
1. Add a RHEL6.6 host with the mentioned qemu-kvm-rhev version to RHEVM, check that it does not support live snapshot
2. Create a VM with disk attached on one domain
3. Try to live migrate the disk to the second domain

Actual results:
Live storage migration is allowed although the host doesn't support live snapshot

The live snapshot creation operation fails:

2014-10-28 13:51:07,579 INFO  [org.ovirt.engine.core.bll.lsm.LiveMigrateVmDisksCommand] (org.ovirt.thread.pool-7-thread-2) [3fe078e6] Running command: LiveMigrateVmDisksCommand Task handler: LiveSnapshotTaskHandle
r internal: false. Entities affected :  ID: 0ad5eaa4-d093-4bcc-9177-d8404ae7d1b1 Type: DiskAction group CONFIGURE_DISK_STORAGE with role type USER,  ID: a727ba52-c7f5-4810-8368-7f30acbe3d31 Type: StorageAction gro
up CREATE_DISK with role type USER
2014-10-28 13:51:07,816 INFO  [org.ovirt.engine.core.bll.CreateAllSnapshotsFromVmCommand] (org.ovirt.thread.pool-7-thread-2) Command 7858b8a4-61ff-4ec3-bbb9-2a8b182114ed persisting async task placeholder for child
 command bf919c39-61d4-46d8-ab4d-c9c705ee31f2
2014-10-28 13:51:08,460 WARN  [org.ovirt.engine.core.bll.CreateAllSnapshotsFromVmCommand] (org.ovirt.thread.pool-7-thread-2) CanDoAction of action CreateAllSnapshotsFromVm failed. Reasons:VAR__ACTION__CREATE,VAR__
TYPE__SNAPSHOT,ACTION_TYPE_FAILED_QEMU_UNSUPPORTED_OPERATION

Expected results:
Live storage migration operation should be blocked on CDA if the host doesn't support live snapshot.

Additional info: engine and vdsm logs