static void virtio_blk_migration_state_changed(Notifier *notifier, void *data) { VirtIOBlock *s = container_of(notifier, VirtIOBlock, migration_state_notifier); MigrationState *mig = data; Error *err = NULL; if (migration_in_setup(mig)) { if (!s->dataplane) { return; } virtio_blk_data_plane_destroy(s->dataplane); s->dataplane = NULL; } else if (migration_has_finished(mig) || migration_has_failed(mig)) { if (s->dataplane) { return; } bdrv_drain_all(); /* complete in-flight non-dataplane requests */ virtio_blk_data_plane_create(VIRTIO_DEVICE(s), &s->conf, &s->dataplane, &err); if (err != NULL) { error_report("%s", error_get_pretty(err)); error_free(err); } } }