vz: support cpu time in driver's domainGetInfo

Just straight-forward patch.
Use reference counting for privdom as stats internally could drop domain lock.
Signed-off-by: NNikolay Shirokovskiy <nshirokovskiy@virtuozzo.com>

src/vz/vz_driver.c

@@ -554,7 +554,7 @@ vzDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
     virDomainObjPtr privdom;
     int ret = -1;
 
-    if (!(privdom = vzDomObjFromDomain(domain)))
+    if (!(privdom = vzDomObjFromDomainRef(domain)))
         goto cleanup;
 
     info->state = virDomainObjGetState(privdom, NULL);
@@ -562,11 +562,24 @@ vzDomainGetInfo(virDomainPtr domain, virDomainInfoPtr info)
     info->maxMem = virDomainDefGetMemoryActual(privdom->def);
     info->nrVirtCpu = privdom->def->vcpus;
     info->cpuTime = 0;
+
+    if (virDomainObjIsActive(privdom)) {
+        unsigned long long vtime;
+        size_t i;
+
+        for (i = 0; i < privdom->def->vcpus; ++i) {
+            if (prlsdkGetVcpuStats(privdom, i, &vtime) < 0) {
+                virReportError(VIR_ERR_OPERATION_FAILED, "%s",
+                               _("cannot read cputime for domain"));
+                goto cleanup;
+            }
+            info->cpuTime += vtime;
+        }
+    }
     ret = 0;
 
  cleanup:
-    if (privdom)
-        virObjectUnlock(privdom);
+    virDomainObjEndAPI(&privdom);
     return ret;
 }