qemu: Refactor lookup of domain object

Use the helper to lookup the domain object in the remaining places.

This patch also fixes error reporting when the domain was not found in several
functions that were printing the raw UUID buffer instead of the formatted
string. The offending functions were:

qemuDomainGetInterfaceParameters
qemuDomainSetInterfaceParameters
qemuGetSchedulerParametersFlags
qemuSetSchedulerParametersFlags
qemuDomainGetNumaParameters
qemuDomainSetNumaParameters
qemuDomainGetMemoryParameters
qemuDomainSetMemoryParameters
qemuDomainGetBlkioParameters
qemuDomainSetBlkioParameters
qemuDomainGetCPUStats

src/qemu/qemu_driver.c

@@ -1572,15 +1572,9 @@ static int qemuDomainSuspend(virDomainPtr dom) {
     int state;
     virQEMUDriverConfigPtr cfg = NULL;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID,
                        "%s", _("domain is not running"));
@@ -1654,15 +1648,8 @@ static int qemuDomainResume(virDomainPtr dom) {
     virQEMUDriverConfigPtr cfg = NULL;
     virCapsPtr caps = NULL;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -1956,14 +1943,8 @@ qemuDomainDestroyFlags(virDomainPtr dom,
 
     virCheckFlags(VIR_DOMAIN_DESTROY_GRACEFUL, -1);
 
-    vm  = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     priv = vm->privateData;
 
@@ -2185,14 +2166,8 @@ static int qemuDomainInjectNMI(virDomainPtr domain, unsigned int flags)
 
     virCheckFlags(0, -1);
 
-    vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(domain->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(domain)))
+        return -1;
 
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID,
@@ -2968,14 +2943,8 @@ qemuDomainSaveFlags(virDomainPtr dom, const char *path, const char *dxml,
         }
     }
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
+    if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
-    }
 
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID,
@@ -3274,15 +3243,8 @@ static int qemuDomainCoreDump(virDomainPtr dom,
                   VIR_DUMP_BYPASS_CACHE | VIR_DUMP_RESET |
                   VIR_DUMP_MEMORY_ONLY, -1);
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (qemuDomainObjBeginAsyncJob(driver, vm,
                                    QEMU_ASYNC_JOB_DUMP) < 0)
@@ -4477,17 +4439,10 @@ static int qemuDomainGetSecurityLabel(virDomainPtr dom, virSecurityLabelPtr secl
     virDomainObjPtr vm;
     int ret = -1;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
     memset(seclabel, 0, sizeof(*seclabel));
 
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!virDomainVirtTypeToString(vm->def->virtType)) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -4534,16 +4489,8 @@ static int qemuDomainGetSecurityLabelList(virDomainPtr dom,
     virDomainObjPtr vm;
     int i, ret = -1;
 
-    /* Protect domain data with qemu lock */
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!virDomainVirtTypeToString(vm->def->virtType)) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
@@ -5142,15 +5089,8 @@ static char *qemuDomainGetXMLDesc(virDomainPtr dom,
 
     /* Flags checked by virDomainDefFormat */
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
+    if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
-    }
 
     priv = vm->privateData;
 
@@ -5484,15 +5424,8 @@ qemuDomainStartWithFlags(virDomainPtr dom, unsigned int flags)
                   VIR_DOMAIN_START_BYPASS_CACHE |
                   VIR_DOMAIN_START_FORCE_BOOT, -1);
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
         goto cleanup;
@@ -5629,16 +5562,10 @@ qemuDomainUndefineFlags(virDomainPtr dom,
     virCheckFlags(VIR_DOMAIN_UNDEFINE_MANAGED_SAVE |
                   VIR_DOMAIN_UNDEFINE_SNAPSHOTS_METADATA, -1);
 
-    cfg = virQEMUDriverGetConfig(driver);
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    cfg = virQEMUDriverGetConfig(driver);
 
     if (!vm->persistent) {
         virReportError(VIR_ERR_OPERATION_INVALID,
@@ -6434,14 +6361,9 @@ qemuDomainModifyDeviceFlags(virDomainPtr dom, const char *xml,
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
+    if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
-    }
+
     priv = vm->privateData;
 
     if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
@@ -6635,15 +6557,10 @@ static int qemuDomainSetAutostart(virDomainPtr dom,
     int ret = -1;
     virQEMUDriverConfigPtr cfg = NULL;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
+
     cfg = virQEMUDriverGetConfig(driver);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
 
     if (!vm->persistent) {
         virReportError(VIR_ERR_OPERATION_INVALID,
@@ -6913,12 +6830,9 @@ qemuDomainSetBlkioParameters(virDomainPtr dom,
                                        NULL) < 0)
         return -1;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
+
     cfg = virQEMUDriverGetConfig(driver);
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
@@ -7070,13 +6984,8 @@ qemuDomainGetBlkioParameters(virDomainPtr dom,
      * that can't parse it.  */
     flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
@@ -7396,13 +7305,8 @@ qemuDomainGetMemoryParameters(virDomainPtr dom,
     /* We don't return strings, and thus trivially support this flag.  */
     flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
@@ -7561,13 +7465,9 @@ qemuDomainSetNumaParameters(virDomainPtr dom,
                                        NULL) < 0)
         return -1;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
     cfg = virQEMUDriverGetConfig(driver);
 
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
@@ -7715,13 +7615,8 @@ qemuDomainGetNumaParameters(virDomainPtr dom,
      * that can't parse it.  */
     flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
@@ -7923,13 +7818,8 @@ qemuSetSchedulerParametersFlags(virDomainPtr dom,
                                        NULL) < 0)
         return -1;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -8211,13 +8101,8 @@ qemuGetSchedulerParametersFlags(virDomainPtr dom,
         cpu_bw_status = !!rc;
     }
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
+    if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
-    }
 
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
@@ -8739,13 +8624,8 @@ qemuDomainSetInterfaceParameters(virDomainPtr dom,
                                        NULL) < 0)
         return -1;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -8907,13 +8787,8 @@ qemuDomainGetInterfaceParameters(virDomainPtr dom,
 
     flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), dom->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
@@ -9559,14 +9434,8 @@ qemuDomainMigratePerform(virDomainPtr dom,
         goto cleanup;
     }
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
+    if (!(vm = qemuDomObjFromDomain(dom)))
         goto cleanup;
-    }
 
     if (flags & VIR_MIGRATE_PEER2PEER) {
         dconnuri = uri;
@@ -9645,14 +9514,8 @@ qemuDomainMigrateBegin3(virDomainPtr domain,
 
     virCheckFlags(QEMU_MIGRATION_FLAGS, NULL);
 
-    vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(domain->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(domain)))
+        return NULL;
 
     if ((flags & VIR_MIGRATE_CHANGE_PROTECTION)) {
         if (qemuMigrationJobStart(driver, vm, QEMU_ASYNC_JOB_MIGRATION_OUT) < 0)
@@ -9822,26 +9685,16 @@ qemuDomainMigratePerform3(virDomainPtr dom,
 {
     virQEMUDriverPtr driver = dom->conn->privateData;
     virDomainObjPtr vm;
-    int ret = -1;
 
     virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
 
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(dom->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
-
-    ret = qemuMigrationPerform(driver, dom->conn, vm, xmlin,
-                               dconnuri, uri, cookiein, cookieinlen,
-                               cookieout, cookieoutlen,
-                               flags, dname, resource, true);
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
-cleanup:
-    return ret;
+    return qemuMigrationPerform(driver, dom->conn, vm, xmlin,
+                                dconnuri, uri, cookiein, cookieinlen,
+                                cookieout, cookieoutlen,
+                                flags, dname, resource, true);
 }
 
 
@@ -9894,14 +9747,8 @@ qemuDomainMigrateConfirm3(virDomainPtr domain,
 
     virCheckFlags(QEMU_MIGRATION_FLAGS, -1);
 
-    vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
-    if (!vm) {
-        char uuidstr[VIR_UUID_STRING_BUFLEN];
-        virUUIDFormat(domain->uuid, uuidstr);
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(domain)))
+        return -1;
 
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -11553,12 +11400,9 @@ qemuDomainSnapshotCreateXML(virDomainPtr domain,
         parse_flags |= VIR_DOMAIN_SNAPSHOT_PARSE_REDEFINE;
 
     virUUIDFormat(domain->uuid, uuidstr);
-    vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
-    if (!vm) {
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
+
+    if (!(vm = qemuDomObjFromDomain(domain)))
         goto cleanup;
-    }
 
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -12230,7 +12074,6 @@ static int qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
     virDomainObjPtr vm = NULL;
     int ret = -1;
     virDomainSnapshotObjPtr snap = NULL;
-    char uuidstr[VIR_UUID_STRING_BUFLEN];
     virDomainEventPtr event = NULL;
     virDomainEventPtr event2 = NULL;
     int detail;
@@ -12258,13 +12101,8 @@ static int qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
      * and use of FORCE can cause multiple transitions.
      */
 
-    virUUIDFormat(snapshot->domain->uuid, uuidstr);
-    vm = virDomainObjListFindByUUID(driver->domains, snapshot->domain->uuid);
-    if (!vm) {
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromSnapshot(snapshot)))
+        return -1;
 
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -12616,7 +12454,6 @@ static int qemuDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
     virDomainObjPtr vm = NULL;
     int ret = -1;
     virDomainSnapshotObjPtr snap = NULL;
-    char uuidstr[VIR_UUID_STRING_BUFLEN];
     virQEMUSnapRemove rem;
     virQEMUSnapReparent rep;
     bool metadata_only = !!(flags & VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY);
@@ -12627,13 +12464,8 @@ static int qemuDomainSnapshotDelete(virDomainSnapshotPtr snapshot,
                   VIR_DOMAIN_SNAPSHOT_DELETE_METADATA_ONLY |
                   VIR_DOMAIN_SNAPSHOT_DELETE_CHILDREN_ONLY, -1);
 
-    virUUIDFormat(snapshot->domain->uuid, uuidstr);
-    vm = virDomainObjListFindByUUID(driver->domains, snapshot->domain->uuid);
-    if (!vm) {
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromSnapshot(snapshot)))
+        return -1;
 
     cfg = virQEMUDriverGetConfig(driver);
     if (!(snap = qemuSnapObjFromSnapshot(vm, snapshot)))
@@ -13220,7 +13052,6 @@ qemuDomainBlockJobImpl(virDomainPtr dom, const char *path, const char *base,
     virQEMUDriverPtr driver = dom->conn->privateData;
     virDomainObjPtr vm = NULL;
     qemuDomainObjPrivatePtr priv;
-    char uuidstr[VIR_UUID_STRING_BUFLEN];
     char *device = NULL;
     int ret = -1;
     bool async = false;
@@ -13228,13 +13059,9 @@ qemuDomainBlockJobImpl(virDomainPtr dom, const char *path, const char *base,
     int idx;
     virDomainDiskDefPtr disk;
 
-    virUUIDFormat(dom->uuid, uuidstr);
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
+
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                        _("domain is not running"));
@@ -13775,20 +13602,14 @@ qemuDomainOpenGraphics(virDomainPtr dom,
 {
     virQEMUDriverPtr driver = dom->conn->privateData;
     virDomainObjPtr vm = NULL;
-    char uuidstr[VIR_UUID_STRING_BUFLEN];
     int ret = -1;
     qemuDomainObjPrivatePtr priv;
     const char *protocol;
 
     virCheckFlags(VIR_DOMAIN_OPEN_GRAPHICS_SKIPAUTH, -1);
 
-    virUUIDFormat(dom->uuid, uuidstr);
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID,
@@ -13847,7 +13668,6 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
     virDomainDefPtr persistentDef = NULL;
     virDomainBlockIoTuneInfo info;
     virDomainBlockIoTuneInfo *oldinfo;
-    char uuidstr[VIR_UUID_STRING_BUFLEN];
     const char *device = NULL;
     int ret = -1;
     int i;
@@ -13877,13 +13697,9 @@ qemuDomainSetBlockIoTune(virDomainPtr dom,
 
     memset(&info, 0, sizeof(info));
 
-    virUUIDFormat(dom->uuid, uuidstr);
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
+
     priv = vm->privateData;
     cfg = virQEMUDriverGetConfig(driver);
 
@@ -14025,7 +13841,6 @@ qemuDomainGetBlockIoTune(virDomainPtr dom,
     qemuDomainObjPrivatePtr priv;
     virDomainDefPtr persistentDef = NULL;
     virDomainBlockIoTuneInfo reply;
-    char uuidstr[VIR_UUID_STRING_BUFLEN];
     const char *device = NULL;
     int ret = -1;
     int i;
@@ -14038,13 +13853,8 @@ qemuDomainGetBlockIoTune(virDomainPtr dom,
     /* We don't return strings, and thus trivially support this flag.  */
     flags &= ~VIR_TYPED_PARAM_STRING_OKAY;
 
-    virUUIDFormat(dom->uuid, uuidstr);
-    vm = virDomainObjListFindByUUID(driver->domains, dom->uuid);
-    if (!vm) {
-        virReportError(VIR_ERR_NO_DOMAIN,
-                       _("no domain with matching uuid '%s'"), uuidstr);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(dom)))
+        return -1;
 
     if (!(caps = virQEMUDriverGetCapabilities(driver, false)))
         goto cleanup;
@@ -14627,12 +14437,8 @@ qemuDomainGetCPUStats(virDomainPtr domain,
 
     virCheckFlags(VIR_TYPED_PARAM_STRING_OKAY, -1);
 
-    vm = virDomainObjListFindByUUID(driver->domains, domain->uuid);
-    if (vm == NULL) {
-        virReportError(VIR_ERR_INTERNAL_ERROR,
-                       _("No such domain %s"), domain->uuid);
-        goto cleanup;
-    }
+    if (!(vm = qemuDomObjFromDomain(domain)))
+        return -1;
 
     isActive = virDomainObjIsActive(vm);
     if (!isActive) {