+
trace_vfio_save_complete_precopy_start(vbasedev->name);
/* We reach here with device state STOP or STOP_COPY only */
@@ -974,12 +1011,129 @@ static int vfio_save_complete_precopy(QEMUFile *f, void
*opaque)
return ret;
}
+static int
+vfio_save_complete_precopy_async_thread_config_state(VFIODevice *vbasedev,
+ char *idstr,
+ uint32_t instance_id,
+ uint32_t idx)
+{
+ g_autoptr(QIOChannelBuffer) bioc = NULL;
+ g_autoptr(QEMUFile) f = NULL;
+ int ret;
+ g_autofree VFIODeviceStatePacket *packet = NULL;
+ size_t packet_len;
+
+ bioc = qio_channel_buffer_new(0);
+ qio_channel_set_name(QIO_CHANNEL(bioc), "vfio-device-config-save");
+
+ f = qemu_file_new_output(QIO_CHANNEL(bioc));
+
+ ret = vfio_save_device_config_state(f, vbasedev, NULL);
+ if (ret) {
+ return ret;
+ }
+
+ ret = qemu_fflush(f);
+ if (ret) {
+ return ret;
+ }
+
+ packet_len = sizeof(*packet) + bioc->usage;
+ packet = g_malloc0(packet_len);
+ packet->idx = idx;
+ packet->flags = VFIO_DEVICE_STATE_CONFIG_STATE;
+ memcpy(&packet->data, bioc->data, bioc->usage);
+
+ if (!multifd_queue_device_state(idstr, instance_id,
+ (char *)packet, packet_len)) {
+ return -1;
+ }
+
+ qatomic_add(&bytes_transferred, packet_len);
+
+ return 0;
+}
+
+static int vfio_save_complete_precopy_thread(char *idstr,
+ uint32_t instance_id,
+ bool *abort_flag,
+ void *opaque)
+{
+ VFIODevice *vbasedev = opaque;
+ VFIOMigration *migration = vbasedev->migration;
+ int ret;
+ g_autofree VFIODeviceStatePacket *packet = NULL;
+ uint32_t idx;
+
+ if (!migration->multifd_transfer) {
+ /* Nothing to do, vfio_save_complete_precopy() does the transfer. */
+ return 0;
+ }
+
+ trace_vfio_save_complete_precopy_thread_start(vbasedev->name,
+ idstr, instance_id);
+
+ /* We reach here with device state STOP or STOP_COPY only */
+ ret = vfio_migration_set_state(vbasedev, VFIO_DEVICE_STATE_STOP_COPY,
+ VFIO_DEVICE_STATE_STOP, NULL);
+ if (ret) {
+ goto ret_finish;
+ }
+
+ packet = g_malloc0(sizeof(*packet) + migration->data_buffer_size);
+
+ for (idx = 0; ; idx++) {
+ ssize_t data_size;
+ size_t packet_size;
+
+ if (qatomic_read(abort_flag)) {
+ ret = -ECANCELED;
+ goto ret_finish;
+ }
+
+ data_size = read(migration->data_fd, &packet->data,
+ migration->data_buffer_size);
+ if (data_size < 0) {
+ ret = -errno;
+ goto ret_finish;
+ } else if (data_size == 0) {
+ break;
+ }
+
+ packet->idx = idx;
+ packet_size = sizeof(*packet) + data_size;
+
+ if (!multifd_queue_device_state(idstr, instance_id,
+ (char *)packet, packet_size)) {
+ ret = -1;
+ goto ret_finish;
+ }
+
+ qatomic_add(&bytes_transferred, packet_size);
+ }
+
+ ret = vfio_save_complete_precopy_async_thread_config_state(vbasedev, idstr,
+ instance_id,
+ idx);