[Qemu-devel] [PATCH V6 11/17] qapi: Add new command to query colo status

[Zhang Chen]

Libvirt or other high level software can use this command query colo status.
You can test this command like that:
{'execute':'query-colo-status'}

Signed-off-by: Zhang Chen <address@hidden>
---
 migration/colo.c    | 31 +++++++++++++++++++++++++++++++
 qapi/migration.json | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 64 insertions(+)

diff --git a/migration/colo.c b/migration/colo.c
index 8ca6381..127db3c 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -237,6 +237,37 @@ void qmp_xen_colo_do_checkpoint(Error **errp)
 #endif
 }
 
+COLOStatus *qmp_query_colo_status(Error **errp)
+{
+    MigrationState *m;
+    MigrationIncomingState *mis;
+    COLOStatus *s = g_new0(COLOStatus, 1);
+
+    if (get_colo_mode() == COLO_MODE_PRIMARY) {
+        m = migrate_get_current();
+
+        if (m->state == MIGRATION_STATUS_COLO) {
+            s->colo_running = true;
+        } else {
+            s->colo_running = false;
+        }
+        s->mode = COLO_MODE_PRIMARY;
+    } else {
+        mis = migration_incoming_get_current();
+
+        if (mis->state == MIGRATION_STATUS_COLO) {
+            s->colo_running = true;
+        } else {
+            s->colo_running = false;
+        }
+        s->mode = COLO_MODE_SECONDARY;
+    }
+
+    s->reason = failover_get_state();
+
+    return s;
+}
+
 static void colo_send_message(QEMUFile *f, COLOMessage msg,
                               Error **errp)
 {
diff --git a/qapi/migration.json b/qapi/migration.json
index 6c6c50e..8ccdd21 100644
--- a/qapi/migration.json
+++ b/qapi/migration.json
@@ -1201,3 +1201,36 @@
 # Since: 2.9
 ##
 { 'command': 'xen-colo-do-checkpoint' }
+
+##
+# @COLOStatus:
+#
+# The result format for 'query-colo-status'.
+#
+# @mode: which COLO mode the VM was in when it exited.
+#
+# @colo-running: if true means COLO running well, otherwise COLO have done.
+#
+# @reason: describes the reason for the COLO exit.
+#
+# Since: 2.12
+##
+{ 'struct': 'COLOStatus',
+  'data': { 'mode': 'COLOMode', 'colo-running': 'bool', 'reason': 
'COLOExitReason' } }
+
+##
+# @query-colo-status:
+#
+# Query COLO status while the vm is running.
+#
+# Returns: A @COLOStatus object showing the status.
+#
+# Example:
+#
+# -> { "execute": "query-colo-status" }
+# <- { "return": { "mode": "primary", "colo-running": true, "reason": 
"request" } }
+#
+# Since: 2.12
+##
+{ 'command': 'query-colo-status',
+  'returns': 'COLOStatus' }
-- 
2.7.4