[libvirt] [PATCH] qemu: Obtain job before checking if domain is live

[Martin Kletzander]

Since obtaining a job can wait for another job to finish, the state
might change in the meantime.  And checking it more than once is
pointless.

Signed-off-by: Martin Kletzander <mkletzan at redhat.com>
---
 src/qemu/qemu_driver.c | 36 +++++++++++++++---------------------
 1 file changed, 15 insertions(+), 21 deletions(-)

diff --git a/src/qemu/qemu_driver.c b/src/qemu/qemu_driver.c
index efb3f854fb10..e677440c20b2 100644
--- a/src/qemu/qemu_driver.c
+++ b/src/qemu/qemu_driver.c
@@ -5388,16 +5388,16 @@ qemuDomainGetVcpusFlags(virDomainPtr dom, unsigned int flags)
         goto cleanup;

     if (flags & VIR_DOMAIN_VCPU_GUEST) {
+        if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
+            goto cleanup;
+
         if (!virDomainObjIsActive(vm)) {
             virReportError(VIR_ERR_INVALID_ARG, "%s",
                            _("vCPU count provided by the guest agent can only be "
                              "requested for live domains"));
-            goto cleanup;
+            goto endjob;
         }

-        if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_QUERY) < 0)
-            goto cleanup;
-
         if (!qemuDomainAgentAvailable(vm, true))
             goto endjob;

@@ -17796,10 +17796,13 @@ qemuDomainPMSuspendForDuration(virDomainPtr dom,
     if (virDomainPMSuspendForDurationEnsureACL(dom->conn, vm->def) < 0)
         goto cleanup;

+    if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
+        goto cleanup;
+
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID,
                        "%s", _("domain is not running"));
-        goto cleanup;
+        goto endjob;
     }

     if (!virQEMUCapsGet(priv->qemuCaps, QEMU_CAPS_WAKEUP) &&
@@ -17808,7 +17811,7 @@ qemuDomainPMSuspendForDuration(virDomainPtr dom,
         virReportError(VIR_ERR_ARGUMENT_UNSUPPORTED, "%s",
                        _("Unable to suspend domain due to "
                          "missing system_wakeup monitor command"));
-        goto cleanup;
+        goto endjob;
     }

     if (vm->def->pm.s3 || vm->def->pm.s4) {
@@ -17817,29 +17820,20 @@ qemuDomainPMSuspendForDuration(virDomainPtr dom,
              target == VIR_NODE_SUSPEND_TARGET_HYBRID)) {
             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                            _("S3 state is disabled for this domain"));
-            goto cleanup;
+            goto endjob;
         }

         if (vm->def->pm.s4 == VIR_TRISTATE_BOOL_NO &&
             target == VIR_NODE_SUSPEND_TARGET_DISK) {
             virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
                            _("S4 state is disabled for this domain"));
-            goto cleanup;
+            goto endjob;
         }
     }

-    if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
-        goto cleanup;
-
     if (!qemuDomainAgentAvailable(vm, true))
         goto endjob;

-    if (!virDomainObjIsActive(vm)) {
-        virReportError(VIR_ERR_OPERATION_INVALID,
-                       "%s", _("domain is not running"));
-        goto endjob;
-    }
-
     qemuDomainObjEnterAgent(vm);
     ret = qemuAgentSuspend(priv->agent, target);
     qemuDomainObjExitAgent(vm);
@@ -17942,15 +17936,15 @@ qemuDomainQemuAgentCommand(virDomainPtr domain,
     if (virDomainQemuAgentCommandEnsureACL(domain->conn, vm->def) < 0)
         goto cleanup;

+    if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
+        goto cleanup;
+
     if (!virDomainObjIsActive(vm)) {
         virReportError(VIR_ERR_OPERATION_INVALID,
                        "%s", _("domain is not running"));
-        goto cleanup;
+        goto endjob;
     }

-    if (qemuDomainObjBeginJob(driver, vm, QEMU_JOB_MODIFY) < 0)
-        goto cleanup;
-
     if (!qemuDomainAgentAvailable(vm, true))
         goto endjob;

-- 
2.8.4