package org.ovirt.engine.core.bll.scheduling.policyunits;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.inject.Inject;
import org.ovirt.engine.core.bll.hostdev.HostDeviceManager;
import org.ovirt.engine.core.bll.scheduling.PolicyUnitImpl;
import org.ovirt.engine.core.bll.scheduling.SchedulingUnit;
import org.ovirt.engine.core.bll.scheduling.pending.PendingResourceManager;
import org.ovirt.engine.core.common.businessentities.Cluster;
import org.ovirt.engine.core.common.businessentities.VDS;
import org.ovirt.engine.core.common.businessentities.VM;
import org.ovirt.engine.core.common.errors.EngineMessage;
import org.ovirt.engine.core.common.scheduling.PerHostMessages;
import org.ovirt.engine.core.common.scheduling.PolicyUnit;
import org.ovirt.engine.core.common.scheduling.PolicyUnitType;
import org.ovirt.engine.core.compat.Guid;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Filters hosts based on the passthroughSupported flag when the VM requires hostdev passthrough
*/
@SchedulingUnit(
guid = "728a21f1-f97e-4d32-bc3e-b3cc49756abb",
name = "HostDevice",
description = "Filters out hosts not supporting VM required host devices",
type = PolicyUnitType.FILTER
)
public class HostDeviceFilterPolicyUnit extends PolicyUnitImpl {
private static final Logger log = LoggerFactory.getLogger(HostDeviceFilterPolicyUnit.class);
@Inject
private HostDeviceManager hostDeviceManager;
public HostDeviceFilterPolicyUnit(PolicyUnit policyUnit, PendingResourceManager pendingResourceManager) {
super(policyUnit, pendingResourceManager);
}
@Override
public List<VDS> filter(Cluster cluster, List<VDS> hosts, VM vm, Map<String, String> parameters, PerHostMessages messages) {
// noop if VM does not require host devices
if (!hostDeviceManager.checkVmNeedsDirectPassthrough(vm)) {
return hosts;
}
boolean hasPciDevices = hostDeviceManager.checkVmNeedsPciDevices(vm.getId());
// In case of direct host device passthrough the 'dedicatedVmForVdsList' contains exactly 1 element.
Guid hostId = vm.getDedicatedVmForVdsList().get(0);
List<VDS> list = new ArrayList<>();
for (VDS host : hosts) {
if (hasPciDevices && !host.isHostDevicePassthroughEnabled()) {
messages.addMessage(host.getId(), EngineMessage.VAR__DETAIL__HOSTDEV_DISABLED.toString());
log.debug("Host '{}' does not support host device passthrough", host.getName());
continue;
}
if (!hostId.equals(host.getId())) {
messages.addMessage(host.getId(), EngineMessage.VAR__DETAIL__WRONG_HOST_FOR_REQUESTED_HOST_DEVICES.toString());
log.debug("Host '{}' does not provide required host devices", host.getName());
continue;
}
if (!hostDeviceManager.checkVmHostDeviceAvailability(vm, host.getId())) {
messages.addMessage(host.getId(), EngineMessage.VAR__DETAIL__HOST_DEVICE_UNAVAILABLE.toString());
log.debug("Some of the devices on host '{}' are unavailable", host.getName());
continue;
}
list.add(host);
}
return list;
}
}