storage: allow VM snapshots without memory for KVM when global settin…

…g allows (apache#8062)

This removes the conditional logic where comment notest to remove it
after PR apache#5297 is merged that is applicable for ACS 4.18+. Only when the
global setting is enabled and memory isn't selected, VM snapshot could
be allowed for VMs on KVM that have qemu-guest-agent running.

Signed-off-by: Rohit Yadav <[email protected]>

engine/storage/snapshot/src/main/java/org/apache/cloudstack/storage/vmsnapshot/StorageVMSnapshotStrategy.java

@@ -59,7 +59,6 @@
 import com.cloud.storage.GuestOSVO;
 import com.cloud.storage.Snapshot;
 import com.cloud.storage.SnapshotVO;
-import com.cloud.storage.Storage;
 import com.cloud.storage.VolumeApiService;
 import com.cloud.storage.VolumeVO;
 import com.cloud.storage.dao.SnapshotDao;
@@ -360,10 +359,6 @@ public StrategyPriority canHandle(VMSnapshot vmSnapshot) {
 
     @Override
     public StrategyPriority canHandle(Long vmId, Long rootPoolId, boolean snapshotMemory) {
-        //This check could be removed when PR #5297 is merged
-        if (vmHasNFSOrLocalVolumes(vmId)) {
-            return StrategyPriority.CANT_HANDLE;
-        }
         if (SnapshotManager.VmStorageSnapshotKvm.value() && !snapshotMemory) {
             UserVmVO vm = userVmDao.findById(vmId);
             if (vm.getState() == VirtualMachine.State.Running) {
@@ -465,17 +460,4 @@ protected CreateSnapshotPayload setPayload(VolumeInfo vol, SnapshotVO snapshotCr
         payload.setQuiescevm(false);
         return payload;
     }
-
-    private boolean vmHasNFSOrLocalVolumes(long vmId) {
-        List<VolumeObjectTO> volumeTOs = vmSnapshotHelper.getVolumeTOList(vmId);
-
-        for (VolumeObjectTO volumeTO : volumeTOs) {
-            Long poolId = volumeTO.getPoolId();
-            Storage.StoragePoolType poolType = vmSnapshotHelper.getStoragePoolType(poolId);
-            if (poolType == Storage.StoragePoolType.NetworkFilesystem || poolType == Storage.StoragePoolType.Filesystem) {
-                return true;
-            }
-        }
-        return false;
-    }
 }