[libvirt] [PATCH] Check return value of qemuMonitorDriveDel.

[Hu Tao]

If we don't check it, virsh users will get "Disk detached successfully"
even when qemuMonitorDriveDel fails.
---
 src/qemu/qemu_hotplug.c      |   10 ++++++++--
 src/qemu/qemu_monitor_json.c |    2 +-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/qemu/qemu_hotplug.c b/src/qemu/qemu_hotplug.c
index fb9db5a..70e9d8e 100644
--- a/src/qemu/qemu_hotplug.c
+++ b/src/qemu/qemu_hotplug.c
@@ -1187,7 +1187,10 @@ int qemuDomainDetachPciDiskDevice(struct qemud_driver *driver,
     }
 
     /* disconnect guest from host device */
-    qemuMonitorDriveDel(priv->mon, drivestr);
+    if (qemuMonitorDriveDel(priv->mon, drivestr) != 0) {
+        qemuDomainObjExitMonitor(vm);
+        goto cleanup;
+    }
 
     qemuDomainObjExitMonitorWithDriver(driver, vm);
 
@@ -1269,7 +1272,10 @@ int qemuDomainDetachSCSIDiskDevice(struct qemud_driver *driver,
     }
 
     /* disconnect guest from host device */
-    qemuMonitorDriveDel(priv->mon, drivestr);
+    if (qemuMonitorDriveDel(priv->mon, drivestr) != 0) {
+        qemuDomainObjExitMonitor(vm);
+        goto cleanup;
+    }
 
     qemuDomainObjExitMonitorWithDriver(driver, vm);
 
diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index d5e8d37..b088405 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -2338,7 +2338,7 @@ int qemuMonitorJSONDriveDel(qemuMonitorPtr mon,
     if (ret == 0) {
         /* See if drive_del isn't supported */
         if (qemuMonitorJSONHasError(reply, "CommandNotFound")) {
-            VIR_ERROR0(_("deleting disk is not supported.  "
+            qemuReportError(VIR_ERR_NO_SUPPORT, _("deleting disk is not supported.  "
                         "This may leak data if disk is reassigned"));
             ret = 1;
             goto cleanup;
-- 
1.7.3.1