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migration: migration_stop_vm() helper

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Provide a helper for non-COLO use case of migration to stop a VM.  This
prepares for adding some downtime relevant tracepoints to migration, where
they may or may not apply to COLO.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <20231030163346.765724-5-peterx@redhat.com>
This commit is contained in:
Peter Xu 2023-10-30 12:33:45 -04:00 committed by Juan Quintela
parent 3c80f14272
commit 93bdf888fa
2 changed files with 10 additions and 3 deletions
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11
migration/migration.c
View File

@ -149,6 +149,11 @@ static gint page_request_addr_cmp(gconstpointer ap, gconstpointer bp)
return (a > b) - (a < b);
}
int migration_stop_vm(RunState state)
{
return vm_stop_force_state(state);
}
void migration_object_init(void)
{
/* This can only be called once. */
@ -2169,7 +2174,7 @@ static int postcopy_start(MigrationState *ms, Error **errp)
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL);
global_state_store();
ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
ret = migration_stop_vm(RUN_STATE_FINISH_MIGRATE);
if (ret < 0) {
goto fail;
}
@ -2371,7 +2376,7 @@ static int migration_completion_precopy(MigrationState *s,
s->vm_old_state = runstate_get();
global_state_store();
ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
ret = migration_stop_vm(RUN_STATE_FINISH_MIGRATE);
trace_migration_completion_vm_stop(ret);
if (ret < 0) {
goto out_unlock;
@ -3222,7 +3227,7 @@ static void *bg_migration_thread(void *opaque)
global_state_store();
/* Forcibly stop VM before saving state of vCPUs and devices */
if (vm_stop_force_state(RUN_STATE_PAUSED)) {
if (migration_stop_vm(RUN_STATE_PAUSED)) {
goto fail;
}
/*

2
migration/migration.h
View File

@ -544,4 +544,6 @@ void migration_rp_wait(MigrationState *s);
*/
void migration_rp_kick(MigrationState *s);
int migration_stop_vm(RunState state);
#endif