static BlockAIOCB *iscsi_aio_ioctl(BlockDriverState *bs, unsigned long int req, void *buf, BlockCompletionFunc *cb, void *opaque) { IscsiLun *iscsilun = bs->opaque; struct iscsi_context *iscsi = iscsilun->iscsi; struct iscsi_data data; IscsiAIOCB *acb; acb = qemu_aio_get(&iscsi_aiocb_info, bs, cb, opaque); acb->iscsilun = iscsilun; acb->bh = NULL; acb->status = -EINPROGRESS; acb->buf = NULL; acb->ioh = buf; if (req != SG_IO) { iscsi_ioctl_handle_emulated(acb, req, buf); return &acb->common; acb->task = malloc(sizeof(struct scsi_task)); if (acb->task == NULL) { error_report("iSCSI: Failed to allocate task for scsi command. %s", iscsi_get_error(iscsi)); memset(acb->task, 0, sizeof(struct scsi_task)); switch (acb->ioh->dxfer_direction) { case SG_DXFER_TO_DEV: acb->task->xfer_dir = SCSI_XFER_WRITE; break; case SG_DXFER_FROM_DEV: acb->task->xfer_dir = SCSI_XFER_READ; break; default: acb->task->xfer_dir = SCSI_XFER_NONE; break; acb->task->cdb_size = acb->ioh->cmd_len; memcpy(&acb->task->cdb[0], acb->ioh->cmdp, acb->ioh->cmd_len); acb->task->expxferlen = acb->ioh->dxfer_len; data.size = 0; if (acb->task->xfer_dir == SCSI_XFER_WRITE) { if (acb->ioh->iovec_count == 0) { data.data = acb->ioh->dxferp; data.size = acb->ioh->dxfer_len; } else { scsi_task_set_iov_out(acb->task, (struct scsi_iovec *) acb->ioh->dxferp, acb->ioh->iovec_count); if (iscsi_scsi_command_async(iscsi, iscsilun->lun, acb->task, iscsi_aio_ioctl_cb, (data.size > 0) ? &data : NULL, acb) != 0) { scsi_free_scsi_task(acb->task); /* tell libiscsi to read straight into the buffer we got from ioctl */ if (acb->task->xfer_dir == SCSI_XFER_READ) { if (acb->ioh->iovec_count == 0) { scsi_task_add_data_in_buffer(acb->task, acb->ioh->dxfer_len, acb->ioh->dxferp); } else { scsi_task_set_iov_in(acb->task, (struct scsi_iovec *) acb->ioh->dxferp, acb->ioh->iovec_count); iscsi_set_events(iscsilun); return &acb->common;