qemu: Ignore missing memory statistics in query-migrate

We want to use query-migrate QMP command to check the current migration
state when reconnecting to active domains, but the reply we get to this
command may not contain any statistics at all if called on the
destination host.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
Reviewed-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>

diff --git a/src/qemu/qemu_monitor_json.c b/src/qemu/qemu_monitor_json.c
index 83d0600a75ea7175ef17c468da5d35fb4ad1156c..86b7f615c8ebe7375e82f8be0a1002e3978b704f 100644 (file)
--- a/src/qemu/qemu_monitor_json.c
+++ b/src/qemu/qemu_monitor_json.c
@@ -3249,56 +3249,49 @@ qemuMonitorJSONGetMigrationStatsReply(virJSONValue *reply,
     case QEMU_MONITOR_MIGRATION_STATUS_PRE_SWITCHOVER:
     case QEMU_MONITOR_MIGRATION_STATUS_DEVICE:
         ram = virJSONValueObjectGetObject(ret, "ram");
-        if (!ram) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("migration was active, but no RAM info was set"));
-            return -1;
-        }
+        if (ram) {
+            if (virJSONValueObjectGetNumberUlong(ram, "transferred",
+                                                 &stats->ram_transferred) < 0) {
+                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                               _("migration was active, but RAM 'transferred' data was missing"));
+                return -1;
+            }
+            if (virJSONValueObjectGetNumberUlong(ram, "remaining",
+                                                 &stats->ram_remaining) < 0) {
+                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                               _("migration was active, but RAM 'remaining' data was missing"));
+                return -1;
+            }
+            if (virJSONValueObjectGetNumberUlong(ram, "total",
+                                                 &stats->ram_total) < 0) {
+                virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                               _("migration was active, but RAM 'total' data was missing"));
+                return -1;
+            }
 
-        if (virJSONValueObjectGetNumberUlong(ram, "transferred",
-                                             &stats->ram_transferred) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("migration was active, but RAM 'transferred' "
-                             "data was missing"));
-            return -1;
-        }
-        if (virJSONValueObjectGetNumberUlong(ram, "remaining",
-                                             &stats->ram_remaining) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("migration was active, but RAM 'remaining' "
-                             "data was missing"));
-            return -1;
-        }
-        if (virJSONValueObjectGetNumberUlong(ram, "total",
-                                             &stats->ram_total) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("migration was active, but RAM 'total' "
-                             "data was missing"));
-            return -1;
-        }
+            if (virJSONValueObjectGetNumberDouble(ram, "mbps", &mbps) == 0 &&
+                mbps > 0) {
+                /* mpbs from QEMU reports Mbits/s (M as in 10^6 not Mi as 2^20) */
+                stats->ram_bps = mbps * (1000 * 1000 / 8);
+            }
 
-        if (virJSONValueObjectGetNumberDouble(ram, "mbps", &mbps) == 0 &&
-            mbps > 0) {
-            /* mpbs from QEMU reports Mbits/s (M as in 10^6 not Mi as 2^20) */
-            stats->ram_bps = mbps * (1000 * 1000 / 8);
+            if (virJSONValueObjectGetNumberUlong(ram, "duplicate",
+                                                 &stats->ram_duplicate) == 0)
+                stats->ram_duplicate_set = true;
+            ignore_value(virJSONValueObjectGetNumberUlong(ram, "normal",
+                                                          &stats->ram_normal));
+            ignore_value(virJSONValueObjectGetNumberUlong(ram, "normal-bytes",
+                                                          &stats->ram_normal_bytes));
+            ignore_value(virJSONValueObjectGetNumberUlong(ram, "dirty-pages-rate",
+                                                          &stats->ram_dirty_rate));
+            ignore_value(virJSONValueObjectGetNumberUlong(ram, "page-size",
+                                                          &stats->ram_page_size));
+            ignore_value(virJSONValueObjectGetNumberUlong(ram, "dirty-sync-count",
+                                                          &stats->ram_iteration));
+            ignore_value(virJSONValueObjectGetNumberUlong(ram, "postcopy-requests",
+                                                          &stats->ram_postcopy_reqs));
         }
 
-        if (virJSONValueObjectGetNumberUlong(ram, "duplicate",
-                                             &stats->ram_duplicate) == 0)
-            stats->ram_duplicate_set = true;
-        ignore_value(virJSONValueObjectGetNumberUlong(ram, "normal",
-                                                      &stats->ram_normal));
-        ignore_value(virJSONValueObjectGetNumberUlong(ram, "normal-bytes",
-                                                      &stats->ram_normal_bytes));
-        ignore_value(virJSONValueObjectGetNumberUlong(ram, "dirty-pages-rate",
-                                                      &stats->ram_dirty_rate));
-        ignore_value(virJSONValueObjectGetNumberUlong(ram, "page-size",
-                                                      &stats->ram_page_size));
-        ignore_value(virJSONValueObjectGetNumberUlong(ram, "dirty-sync-count",
-                                                      &stats->ram_iteration));
-        ignore_value(virJSONValueObjectGetNumberUlong(ram, "postcopy-requests",
-                                                      &stats->ram_postcopy_reqs));
-
         disk = virJSONValueObjectGetObject(ret, "disk");
         if (disk) {
             rc = virJSONValueObjectGetNumberUlong(disk, "transferred",