From 2c9639ecabdb18c3281eba03c509f55efde80aa0 Mon Sep 17 00:00:00 2001
From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Date: Tue, 28 Feb 2017 11:01:56 -0800
Subject: [PATCH 1/2] Add a new qmp command to start/stop replication

We can call this qmp command to start/stop replication outside of qemu.
Like Xen colo need this function.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Wen Congyang <wencongyang@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
---
 migration/colo.c | 26 ++++++++++++++++++++++++++
 qapi-schema.json | 25 +++++++++++++++++++++++++
 2 files changed, 51 insertions(+)

diff --git a/migration/colo.c b/migration/colo.c
index 712308ed5e..46bc84db2d 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -19,6 +19,8 @@
 #include "qemu/error-report.h"
 #include "qapi/error.h"
 #include "migration/failover.h"
+#include "replication.h"
+#include "qmp-commands.h"
 
 static bool vmstate_loading;
 
@@ -147,6 +149,30 @@ void colo_do_failover(MigrationState *s)
     }
 }
 
+void qmp_xen_set_replication(bool enable, bool primary,
+                             bool has_failover, bool failover,
+                             Error **errp)
+{
+    ReplicationMode mode = primary ?
+                           REPLICATION_MODE_PRIMARY :
+                           REPLICATION_MODE_SECONDARY;
+
+    if (has_failover && enable) {
+        error_setg(errp, "Parameter 'failover' is only for"
+                   " stopping replication");
+        return;
+    }
+
+    if (enable) {
+        replication_start_all(mode, errp);
+    } else {
+        if (!has_failover) {
+            failover = NULL;
+        }
+        replication_stop_all(failover, failover ? NULL : errp);
+    }
+}
+
 static void colo_send_message(QEMUFile *f, COLOMessage msg,
                               Error **errp)
 {
diff --git a/qapi-schema.json b/qapi-schema.json
index 150ee98e9e..dbc1ebce34 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -5989,6 +5989,31 @@
 ##
 { 'command': 'xen-load-devices-state', 'data': {'filename': 'str'} }
 
+##
+# @xen-set-replication:
+#
+# Enable or disable replication.
+#
+# @enable: true to enable, false to disable.
+#
+# @primary: true for primary or false for secondary.
+#
+# @failover: #optional true to do failover, false to stop. but cannot be
+#            specified if 'enable' is true. default value is false.
+#
+# Returns: nothing.
+#
+# Example:
+#
+# -> { "execute": "xen-set-replication",
+#      "arguments": {"enable": true, "primary": false} }
+# <- { "return": {} }
+#
+# Since: 2.9
+##
+{ 'command': 'xen-set-replication',
+  'data': { 'enable': 'bool', 'primary': 'bool', '*failover' : 'bool' } }
+
 ##
 # @GICCapability:
 #

From daa33c52153df48ef0a7d06013f8ca6f24eff92f Mon Sep 17 00:00:00 2001
From: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Date: Sat, 25 Feb 2017 10:46:04 +0800
Subject: [PATCH 2/2] Add a new qmp command to do checkpoint, query xen
 replication status

We can call this qmp command to do checkpoint outside of qemu.
Xen colo will need this function.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Wen Congyang <wencongyang@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Stefano Stabellini <sstabellini@kernel.org>
---
 migration/colo.c | 23 +++++++++++++++++++++++
 qapi-schema.json | 48 ++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 71 insertions(+)

diff --git a/migration/colo.c b/migration/colo.c
index 46bc84db2d..c19eb3f073 100644
--- a/migration/colo.c
+++ b/migration/colo.c
@@ -173,6 +173,29 @@ void qmp_xen_set_replication(bool enable, bool primary,
     }
 }
 
+ReplicationStatus *qmp_query_xen_replication_status(Error **errp)
+{
+    Error *err = NULL;
+    ReplicationStatus *s = g_new0(ReplicationStatus, 1);
+
+    replication_get_error_all(&err);
+    if (err) {
+        s->error = true;
+        s->has_desc = true;
+        s->desc = g_strdup(error_get_pretty(err));
+    } else {
+        s->error = false;
+    }
+
+    error_free(err);
+    return s;
+}
+
+void qmp_xen_colo_do_checkpoint(Error **errp)
+{
+    replication_do_checkpoint_all(errp);
+}
+
 static void colo_send_message(QEMUFile *f, COLOMessage msg,
                               Error **errp)
 {
diff --git a/qapi-schema.json b/qapi-schema.json
index dbc1ebce34..d6186d4c9e 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -6014,6 +6014,54 @@
 { 'command': 'xen-set-replication',
   'data': { 'enable': 'bool', 'primary': 'bool', '*failover' : 'bool' } }
 
+##
+# @ReplicationStatus:
+#
+# The result format for 'query-xen-replication-status'.
+#
+# @error: true if an error happened, false if replication is normal.
+#
+# @desc: #optional the human readable error description string, when
+#        @error is 'true'.
+#
+# Since: 2.9
+##
+{ 'struct': 'ReplicationStatus',
+  'data': { 'error': 'bool', '*desc': 'str' } }
+
+##
+# @query-xen-replication-status:
+#
+# Query replication status while the vm is running.
+#
+# Returns: A @ReplicationResult object showing the status.
+#
+# Example:
+#
+# -> { "execute": "query-xen-replication-status" }
+# <- { "return": { "error": false } }
+#
+# Since: 2.9
+##
+{ 'command': 'query-xen-replication-status',
+  'returns': 'ReplicationStatus' }
+
+##
+# @xen-colo-do-checkpoint:
+#
+# Xen uses this command to notify replication to trigger a checkpoint.
+#
+# Returns: nothing.
+#
+# Example:
+#
+# -> { "execute": "xen-colo-do-checkpoint" }
+# <- { "return": {} }
+#
+# Since: 2.9
+##
+{ 'command': 'xen-colo-do-checkpoint' }
+
 ##
 # @GICCapability:
 #