diff options
| author | Longpeng(Mike) <longpeng2@huawei.com> | 2020-11-05 17:17:26 +0800 |
|---|---|---|
| committer | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2020-11-12 15:52:20 +0000 |
| commit | 6ba11211bd616237d028fb5d27f8576fc8cf7b1c (patch) | |
| tree | 2796e5b696d91cae0453ea2065d25be655e55684 /migration | |
| parent | 9e8424088c5648959e4c5d715290e6cfa96df087 (diff) | |
migration: handle CANCELLING state in migration_completion()
The following sequence may cause the VM abort during migration:
1. RUN_STATE_RUNNING,MIGRATION_STATUS_ACTIVE
2. before call migration_completion(), we send migrate_cancel
QMP command, the state machine is changed to:
RUN_STATE_RUNNING,MIGRATION_STATUS_CANCELLING
3. call migration_completion(), and the state machine is
switch to: RUN_STATE_RUNNING,MIGRATION_STATUS_COMPLETED
4. call migration_iteration_finish(), because the migration
status is COMPLETED, so it will try to set the runstate
to POSTMIGRATE, but RUNNING-->POSTMIGRATE is an invalid
transition, so abort().
The migration_completion() should not change the migration state
to COMPLETED if it is already changed to CANCELLING.
Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
Message-Id: <20201105091726.148-1-longpeng2@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Diffstat (limited to 'migration')
| -rw-r--r-- | migration/migration.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/migration/migration.c b/migration/migration.c index f696e22fab..87a9b59f83 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -3061,6 +3061,8 @@ static void migration_completion(MigrationState *s) qemu_savevm_state_complete_postcopy(s->to_dst_file); trace_migration_completion_postcopy_end_after_complete(); + } else if (s->state == MIGRATION_STATUS_CANCELLING) { + goto fail; } /* |