[libvirt] [PATCH] qemu: monitor: Provide more information in generic block job error

Peter Krempa pkrempa at redhat.com
Wed Mar 5 14:15:31 UTC 2014


The qemuMonitorJSONBlockJob handles a few errors internally. If qemu
returns a different error we would report a rather unhelpful message:

 $ virsh blockpull gluster-job vda --base /dev/null
 error: internal error: Unexpected error

As the actual message from qemu contains a bit more info, let's use it
to report something a little more useful:

 $ virsh blockpull gluster-job vda --base /dev/null
 error: internal error: Unexpected error: (GenericError) 'Base '/dev/null' not found'
---
 src/qemu/qemu_monitor_json.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 9a5b812..ee3ae15 100644
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3678,8 +3678,12 @@ qemuMonitorJSONBlockJob(qemuMonitorPtr mon,
             virReportError(VIR_ERR_OPERATION_INVALID,
                            _("Command '%s' is not found"), cmd_name);
         } else {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("Unexpected error"));
+            virJSONValuePtr error = virJSONValueObjectGet(reply, "error");
+
+            virReportError(VIR_ERR_INTERNAL_ERROR,
+                           _("Unexpected error: (%s) '%s'"),
+                           NULLSTR(virJSONValueObjectGetString(error, "class")),
+                           NULLSTR(virJSONValueObjectGetString(error, "desc")));
         }
     }

-- 
1.9.0




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