diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/migration/colo.h | 4 | ||||
| -rw-r--r-- | include/migration/vmstate.h | 14 |
2 files changed, 15 insertions, 3 deletions
diff --git a/include/migration/colo.h b/include/migration/colo.h index 99ce17aca7..f6fbe23ec9 100644 --- a/include/migration/colo.h +++ b/include/migration/colo.h @@ -22,8 +22,6 @@ enum colo_event { COLO_EVENT_FAILOVER, }; -void colo_info_init(void); - void migrate_start_colo_process(MigrationState *s); bool migration_in_colo_state(void); @@ -37,7 +35,7 @@ bool migration_incoming_in_colo_state(void); COLOMode get_colo_mode(void); /* failover */ -void colo_do_failover(MigrationState *s); +void colo_do_failover(void); void colo_checkpoint_notify(void *opaque); #endif diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index a668ec75b8..9224370ed5 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -1035,6 +1035,20 @@ extern const VMStateInfo vmstate_info_qtailq; #define VMSTATE_BUFFER_UNSAFE(_field, _state, _version, _size) \ VMSTATE_BUFFER_UNSAFE_INFO(_field, _state, _version, vmstate_info_buffer, _size) +/* + * These VMSTATE_UNUSED*() macros can be used to fill in the holes + * when some of the vmstate fields are obsolete to be compatible with + * migrations between new/old binaries. + * + * CAUTION: when using any of the VMSTATE_UNUSED*() macros please be + * sure that the size passed in is the size that was actually *sent* + * rather than the size of the *structure*. One example is the + * boolean type - the size of the structure can vary depending on the + * definition of boolean, however the size we actually sent is always + * 1 byte (please refer to implementation of VMSTATE_BOOL_V and + * vmstate_info_bool). So here we should always pass in size==1 + * rather than size==sizeof(bool). + */ #define VMSTATE_UNUSED_V(_v, _size) \ VMSTATE_UNUSED_BUFFER(NULL, _v, _size) |