qapi: Convert migrate_cancel

Signed-off-by: NLuiz Capitulino <lcapitulino@redhat.com>

hmp-commands.hx

@@ -771,8 +771,7 @@ ETEXI
         .args_type  = "",
         .params     = "",
         .help       = "cancel the current VM migration",
-        .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_migrate_cancel,
+        .mhandler.cmd = hmp_migrate_cancel,
     },
 
 STEXI

hmp.c

@@ -662,3 +662,8 @@ void hmp_snapshot_blkdev(Monitor *mon, const QDict *qdict)
     qmp_blockdev_snapshot_sync(device, filename, !!format, format, &errp);
     hmp_handle_error(mon, &errp);
 }
+
+void hmp_migrate_cancel(Monitor *mon, const QDict *qdict)
+{
+    qmp_migrate_cancel(NULL);
+}

hmp.h

@@ -46,5 +46,6 @@ void hmp_block_passwd(Monitor *mon, const QDict *qdict);
 void hmp_balloon(Monitor *mon, const QDict *qdict);
 void hmp_block_resize(Monitor *mon, const QDict *qdict);
 void hmp_snapshot_blkdev(Monitor *mon, const QDict *qdict);
+void hmp_migrate_cancel(Monitor *mon, const QDict *qdict);
 
 #endif

migration.c

@@ -468,10 +468,9 @@ int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
     return 0;
 }
 
-int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data)
+void qmp_migrate_cancel(Error **errp)
 {
     migrate_fd_cancel(migrate_get_current());
-    return 0;
 }
 
 int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data)

migration.h

@@ -42,8 +42,6 @@ int qemu_start_incoming_migration(const char *uri);
 
 int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
 
-int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data);
-
 int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data);
 
 uint64_t migrate_max_downtime(void);

qapi-schema.json

@@ -1127,3 +1127,16 @@
 { 'command': 'human-monitor-command',
   'data': {'command-line': 'str', '*cpu-index': 'int'},
   'returns': 'str' } 
+
+##
+# @migrate_cancel
+#
+# Cancel the current executing migration process.
+#
+# Returns: nothing on success
+#
+# Notes: This command succeeds even if there is no migration process running.
+#
+# Since: 0.14.0
+##
+{ 'command': 'migrate_cancel' }

qmp-commands.hx

@@ -471,10 +471,7 @@ EQMP
     {
         .name       = "migrate_cancel",
         .args_type  = "",
-        .params     = "",
-        .help       = "cancel the current VM migration",
-        .user_print = monitor_user_noop,
-        .mhandler.cmd_new = do_migrate_cancel,
+        .mhandler.cmd_new = qmp_marshal_input_migrate_cancel,
     },
 
 SQMP