qemu: Introduce qemuMonitor[JSON]QueryDump

Add the query-dump API's in order to allow the dump-guest-memory
to be used to monitor progress. This will use the dump stats
extraction helper to fill a return buffer.

Reviewed-by: Jiri Denemark <jdenemar@redhat.com>

src/qemu/qemu_monitor.c

@@ -2775,6 +2775,16 @@ qemuMonitorMigrateCancel(qemuMonitorPtr mon)
 }
 
 
+int
+qemuMonitorQueryDump(qemuMonitorPtr mon,
+                     qemuMonitorDumpStatsPtr stats)
+{
+    QEMU_CHECK_MONITOR_JSON(mon);
+
+    return qemuMonitorJSONQueryDump(mon, stats);
+}
+
+
 /**
  * Returns 1 if @capability is supported, 0 if it's not, or -1 on error.
  */

src/qemu/qemu_monitor.h

@@ -790,6 +790,9 @@ int qemuMonitorMigrateCancel(qemuMonitorPtr mon);
 int qemuMonitorGetDumpGuestMemoryCapability(qemuMonitorPtr mon,
                                             const char *capability);
 
+int qemuMonitorQueryDump(qemuMonitorPtr mon,
+                         qemuMonitorDumpStatsPtr stats);
+
 int qemuMonitorDumpToFd(qemuMonitorPtr mon,
                         int fd,
                         const char *dumpformat);

src/qemu/qemu_monitor_json.c

@@ -3165,6 +3165,45 @@ int qemuMonitorJSONMigrateCancel(qemuMonitorPtr mon)
     return ret;
 }
 
+
+/* qemuMonitorJSONQueryDump:
+ * @mon: Monitor pointer
+ * @stats: Monitor dump stats
+ *
+ * Attempt to make a "query-dump" call, check for errors, and get/return
+ * the current from the reply
+ *
+ * Returns: 0 on success, -1 on failure
+ */
+int
+qemuMonitorJSONQueryDump(qemuMonitorPtr mon,
+                         qemuMonitorDumpStatsPtr stats)
+{
+    virJSONValuePtr cmd = qemuMonitorJSONMakeCommand("query-dump", NULL);
+    virJSONValuePtr reply = NULL;
+    virJSONValuePtr result = NULL;
+    int ret = -1;
+
+    if (!cmd)
+        return -1;
+
+    if (qemuMonitorJSONCommand(mon, cmd, &reply) < 0)
+        goto cleanup;
+
+    if (qemuMonitorJSONCheckError(cmd, reply) < 0)
+        goto cleanup;
+
+    result = virJSONValueObjectGetObject(reply, "return");
+
+    ret = qemuMonitorJSONExtractDumpStats(result, stats);
+
+ cleanup:
+    virJSONValueFree(cmd);
+    virJSONValueFree(reply);
+    return ret;
+}
+
+
 int
 qemuMonitorJSONGetDumpGuestMemoryCapability(qemuMonitorPtr mon,
                                             const char *capability)

src/qemu/qemu_monitor_json.h

@@ -162,6 +162,9 @@ int qemuMonitorJSONGetSpiceMigrationStatus(qemuMonitorPtr mon,
 
 int qemuMonitorJSONMigrateCancel(qemuMonitorPtr mon);
 
+int qemuMonitorJSONQueryDump(qemuMonitorPtr mon,
+                             qemuMonitorDumpStatsPtr stats);
+
 int qemuMonitorJSONGetDumpGuestMemoryCapability(qemuMonitorPtr mon,
                                                 const char *capability);