| 1 | /* |
| 2 | * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO) |
| 3 | * (a.k.a. Fault Tolerance or Continuous Replication) |
| 4 | * |
| 5 | * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD. |
| 6 | * Copyright (c) 2016 FUJITSU LIMITED |
| 7 | * Copyright (c) 2016 Intel Corporation |
| 8 | * |
| 9 | * This work is licensed under the terms of the GNU GPL, version 2 or |
| 10 | * later. See the COPYING file in the top-level directory. |
| 11 | */ |
| 12 | |
| 13 | #ifndef QEMU_COLO_H |
| 14 | #define QEMU_COLO_H |
| 15 | |
| 16 | #include "qapi/qapi-types-migration.h" |
| 17 | |
| 18 | enum colo_event { |
| 19 | COLO_EVENT_NONE, |
| 20 | COLO_EVENT_CHECKPOINT, |
| 21 | COLO_EVENT_FAILOVER, |
| 22 | }; |
| 23 | |
| 24 | void migrate_start_colo_process(MigrationState *s); |
| 25 | bool migration_in_colo_state(void); |
| 26 | |
| 27 | /* loadvm */ |
| 28 | bool migration_incoming_in_colo_state(void); |
| 29 | |
| 30 | COLOMode get_colo_mode(void); |
| 31 | |
| 32 | /* failover */ |
| 33 | void colo_do_failover(void); |
| 34 | |
| 35 | /* |
| 36 | * colo_checkpoint_delay_set |
| 37 | * |
| 38 | * Handles change of x-checkpoint-delay migration parameter, called from |
| 39 | * migrate_params_apply() to notify COLO module about the change. |
| 40 | */ |
| 41 | void colo_checkpoint_delay_set(void); |
| 42 | |
| 43 | /* |
| 44 | * Starts COLO incoming process. Called from process_incoming_migration_co() |
| 45 | * after loading the state. |
| 46 | * |
| 47 | * Called with BQL locked, may temporary release BQL. |
| 48 | */ |
| 49 | void coroutine_fn colo_incoming_co(void); |
| 50 | |
| 51 | void colo_shutdown(void); |
| 52 | #endif |