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