/* * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO) * (a.k.a. Fault Tolerance or Continuous Replication) * * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. * Copyright (c) 2016 FUJITSU LIMITED * Copyright (c) 2016 Intel Corporation * * This work is licensed under the terms of the GNU GPL, version 2 or * later. See the COPYING file in the top-level directory. * */ #include "qemu/osdep.h" #include <migration/colo.h> #include "trace.h" typedef struct { bool colo_requested; } COLOInfo; static COLOInfo colo_info; COLOMode get_colo_mode(void) { if (migration_in_colo_state()) { return COLO_MODE_PRIMARY; } else if (migration_incoming_in_colo_state()) { return COLO_MODE_SECONDARY; } else { return COLO_MODE_UNKNOWN; } } static void colo_info_pre_save(void *opaque) { COLOInfo *s = opaque; s->colo_requested = migrate_colo_enabled(); } static bool colo_info_need(void *opaque) { return migrate_colo_enabled(); } static const VMStateDescription colo_state = { .name = "COLOState", .version_id = 1, .minimum_version_id = 1, .pre_save = colo_info_pre_save, .needed = colo_info_need, .fields = (VMStateField[]) { VMSTATE_BOOL(colo_requested, COLOInfo), VMSTATE_END_OF_LIST() }, }; void colo_info_init(void) { vmstate_register(NULL, 0, &colo_state, &colo_info); } bool migration_incoming_enable_colo(void) { return colo_info.colo_requested; } void migration_incoming_exit_colo(void) { colo_info.colo_requested = false; }