[libvirt] [PATCH 01/11] Introduce qemuDomainObjExitMonitorAlive

[Ján Tomko]

The domain might disappear during the time in monitor when
the virDomainObjPtr is unlocked, so the caller needs to check
if it's still alive.

Introduce a helper function for the callers that want to report
an error in this case.
---
 src/qemu/qemu_domain.c | 17 +++++++++++++++++
 src/qemu/qemu_domain.h |  3 +++
 2 files changed, 20 insertions(+)

diff --git a/src/qemu/qemu_domain.c b/src/qemu/qemu_domain.c
index 8dd427a..d074429 100644
--- a/src/qemu/qemu_domain.c
+++ b/src/qemu/qemu_domain.c
@@ -1606,6 +1606,23 @@ void qemuDomainObjExitMonitor(virQEMUDriverPtr driver,
     qemuDomainObjExitMonitorInternal(driver, obj);
 }
 
+/* obj must NOT be locked before calling
+ *
+ * Same as qemuDomainObjExitMonitor, but reports an error and
+ * returns -1 if the domain is no longer alive after exiting the monitor
+ */
+int qemuDomainObjExitMonitorAlive(virQEMUDriverPtr driver,
+                                  virDomainObjPtr obj)
+{
+    qemuDomainObjExitMonitorInternal(driver, obj);
+    if (!virDomainObjIsActive(obj)) {
+        virReportError(VIR_ERR_OPERATION_FAILED, "%s",
+                       _("domain is no longer running"));
+        return -1;
+    }
+    return 0;
+}
+
 /*
  * obj must be locked before calling
  *
diff --git a/src/qemu/qemu_domain.h b/src/qemu/qemu_domain.h
index ce5eba3..b8fec34 100644
--- a/src/qemu/qemu_domain.h
+++ b/src/qemu/qemu_domain.h
@@ -250,6 +250,9 @@ void qemuDomainObjEnterMonitor(virQEMUDriverPtr driver,
 void qemuDomainObjExitMonitor(virQEMUDriverPtr driver,
                               virDomainObjPtr obj)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
+int qemuDomainObjExitMonitorAlive(virQEMUDriverPtr driver,
+                                  virDomainObjPtr obj)
+    ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
 int qemuDomainObjEnterMonitorAsync(virQEMUDriverPtr driver,
                                    virDomainObjPtr obj,
                                    qemuDomainAsyncJob asyncJob)
-- 
2.0.4