libxl: use job functions in domain save operations

Saving domain memory and cpu state can take considerable time.
Use the recently added job functions and unlock the virDomainObj
while saving the domain.
Signed-off-by: NJim Fehlig <jfehlig@suse.com>

src/libxl/libxl_driver.c

@@ -1902,10 +1902,16 @@ libxlDoDomainSave(libxlDriverPrivatePtr driver, virDomainObjPtr vm,
         goto cleanup;
     }
 
-    if (libxl_domain_suspend(priv->ctx, vm->def->id, fd, 0, NULL) != 0) {
+    /* Unlock virDomainObj while saving domain */
+    virObjectUnlock(vm);
+    ret = libxl_domain_suspend(priv->ctx, vm->def->id, fd, 0, NULL);
+    virObjectLock(vm);
+
+    if (ret != 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("Failed to save domain '%d' with libxenlight"),
                        vm->def->id);
+        ret = -1;
         goto cleanup;
     }
 
@@ -1938,6 +1944,7 @@ libxlDomainSaveFlags(virDomainPtr dom, const char *to, const char *dxml,
     libxlDriverPrivatePtr driver = dom->conn->privateData;
     virDomainObjPtr vm;
     int ret = -1;
+    bool remove_dom = false;
 
     virCheckFlags(0, -1);
     if (dxml) {
@@ -1952,22 +1959,31 @@ libxlDomainSaveFlags(virDomainPtr dom, const char *to, const char *dxml,
     if (virDomainSaveFlagsEnsureACL(dom->conn, vm->def) < 0)
         goto cleanup;
 
+    if (libxlDomainObjBeginJob(driver, vm, LIBXL_JOB_MODIFY) < 0)
+        goto cleanup;
+
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("Domain is not running"));
-        goto cleanup;
+        goto endjob;
     }
 
     if (libxlDoDomainSave(driver, vm, to) < 0)
-        goto cleanup;
+        goto endjob;
 
-    if (!vm->persistent) {
-        virDomainObjListRemove(driver->domains, vm);
-        vm = NULL;
-    }
+    if (!vm->persistent)
+        remove_dom = true;
 
     ret = 0;
 
+endjob:
+    if (!libxlDomainObjEndJob(driver, vm))
+        vm = NULL;
+
 cleanup:
+    if (remove_dom && vm) {
+        virDomainObjListRemove(driver->domains, vm);
+        vm = NULL;
+    }
     if (vm)
         virObjectUnlock(vm);
     return ret;
@@ -2129,6 +2145,7 @@ libxlDomainManagedSave(virDomainPtr dom, unsigned int flags)
     virDomainObjPtr vm = NULL;
     char *name = NULL;
     int ret = -1;
+    bool remove_dom = false;
 
     virCheckFlags(0, -1);
 
@@ -2138,33 +2155,42 @@ libxlDomainManagedSave(virDomainPtr dom, unsigned int flags)
     if (virDomainManagedSaveEnsureACL(dom->conn, vm->def) < 0)
         goto cleanup;
 
+    if (libxlDomainObjBeginJob(driver, vm, LIBXL_JOB_MODIFY) < 0)
+        goto cleanup;
+
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID, "%s", _("Domain is not running"));
-        goto cleanup;
+        goto endjob;
     }
     if (!vm->persistent) {
         virReportError(VIR_ERR_OPERATION_INVALID, "%s",
                        _("cannot do managed save for transient domain"));
-        goto cleanup;
+        goto endjob;
     }
 
     name = libxlDomainManagedSavePath(driver, vm);
     if (name == NULL)
-        goto cleanup;
+        goto endjob;
 
     VIR_INFO("Saving state to %s", name);
 
     if (libxlDoDomainSave(driver, vm, name) < 0)
-        goto cleanup;
+        goto endjob;
 
-    if (!vm->persistent) {
-        virDomainObjListRemove(driver->domains, vm);
-        vm = NULL;
-    }
+    if (!vm->persistent)
+        remove_dom = true;
 
     ret = 0;
 
+endjob:
+    if (!libxlDomainObjEndJob(driver, vm))
+        vm = NULL;
+
 cleanup:
+    if (remove_dom && vm) {
+        virDomainObjListRemove(driver->domains, vm);
+        vm = NULL;
+    }
     if (vm)
         virObjectUnlock(vm);
     VIR_FREE(name);