qemu: Use qemuDomainCheckABIStability where needed

Most places which want to check ABI stability for an active domain need
to call this API rather than the original
qemuDomainDefCheckABIStability. The only exception is in snapshots where
we need to decide what to do depending on the saved image data.

https://bugzilla.redhat.com/show_bug.cgi?id=1460952Signed-off-by: NJiri Denemark <jdenemar@redhat.com>
Reviewed-by: NPavel Hrdina <phrdina@redhat.com>

src/qemu/qemu_driver.c

@@ -3340,7 +3340,7 @@ qemuDomainSaveInternal(virQEMUDriverPtr driver, virDomainPtr dom,
                                             VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE))) {
             goto endjob;
         }
-        if (!qemuDomainDefCheckABIStability(driver, vm->def, def)) {
+        if (!qemuDomainCheckABIStability(driver, vm, def)) {
             virDomainDefFree(def);
             goto endjob;
         }
@@ -15412,39 +15412,50 @@ qemuDomainRevertToSnapshot(virDomainSnapshotPtr snapshot,
          * to have finer control.  */
         if (virDomainObjIsActive(vm)) {
             /* Transitions 5, 6, 8, 9 */
-            /* Replace the CPU in config and put the original one in priv
-             * once we're done.
-             */
-            if (cookie && cookie->cpu && config->cpu) {
-                origCPU = config->cpu;
-                if (!(config->cpu = virCPUDefCopy(cookie->cpu)))
-                    goto endjob;
-            }
-
             /* Check for ABI compatibility. We need to do this check against
              * the migratable XML or it will always fail otherwise */
-            if (config &&
-                !qemuDomainDefCheckABIStability(driver, vm->def, config)) {
-                virErrorPtr err = virGetLastError();
-
-                if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_FORCE)) {
-                    /* Re-spawn error using correct category. */
-                    if (err->code == VIR_ERR_CONFIG_UNSUPPORTED)
-                        virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY, "%s",
-                                       err->str2);
-                    goto endjob;
+            if (config) {
+                bool compatible;
+
+                /* Replace the CPU in config and put the original one in priv
+                 * once we're done. When we have the updated CPU def in the
+                 * cookie, we don't want to replace the CPU in migratable def
+                 * when doing ABI checks to make sure the current CPU exactly
+                 * matches the one used at the time the snapshot was taken.
+                 */
+                if (cookie && cookie->cpu && config->cpu) {
+                    origCPU = config->cpu;
+                    if (!(config->cpu = virCPUDefCopy(cookie->cpu)))
+                        goto endjob;
+
+                    compatible = qemuDomainDefCheckABIStability(driver, vm->def,
+                                                                config);
+                } else {
+                    compatible = qemuDomainCheckABIStability(driver, vm, config);
+                }
+
+                if (!compatible) {
+                    virErrorPtr err = virGetLastError();
+
+                    if (!(flags & VIR_DOMAIN_SNAPSHOT_REVERT_FORCE)) {
+                        /* Re-spawn error using correct category. */
+                        if (err->code == VIR_ERR_CONFIG_UNSUPPORTED)
+                            virReportError(VIR_ERR_SNAPSHOT_REVERT_RISKY, "%s",
+                                           err->str2);
+                        goto endjob;
+                    }
+                    virResetError(err);
+                    qemuProcessStop(driver, vm,
+                                    VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT,
+                                    QEMU_ASYNC_JOB_START, 0);
+                    virDomainAuditStop(vm, "from-snapshot");
+                    detail = VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT;
+                    event = virDomainEventLifecycleNewFromObj(vm,
+                                                     VIR_DOMAIN_EVENT_STOPPED,
+                                                     detail);
+                    qemuDomainEventQueue(driver, event);
+                    goto load;
                 }
-                virResetError(err);
-                qemuProcessStop(driver, vm,
-                                VIR_DOMAIN_SHUTOFF_FROM_SNAPSHOT,
-                                QEMU_ASYNC_JOB_START, 0);
-                virDomainAuditStop(vm, "from-snapshot");
-                detail = VIR_DOMAIN_EVENT_STOPPED_FROM_SNAPSHOT;
-                event = virDomainEventLifecycleNewFromObj(vm,
-                                                 VIR_DOMAIN_EVENT_STOPPED,
-                                                 detail);
-                qemuDomainEventQueue(driver, event);
-                goto load;
             }
 
             priv = vm->privateData;

src/qemu/qemu_migration.c

@@ -2059,7 +2059,7 @@ qemuMigrationBeginPhase(virQEMUDriverPtr driver,
                                             VIR_DOMAIN_DEF_PARSE_SKIP_VALIDATE)))
             goto cleanup;
 
-        if (!qemuDomainDefCheckABIStability(driver, vm->def, def))
+        if (!qemuDomainCheckABIStability(driver, vm, def))
             goto cleanup;
 
         rv = qemuDomainDefFormatLive(driver, def, NULL, false, true);