static int coroutine_fn iscsi_co_writev(BlockDriverState *bs, int64_t sector_num, int nb_sectors, QEMUIOVector *iov) { IscsiLun *iscsilun = bs->opaque; struct IscsiTask iTask; uint64_t lba; uint32_t num_sectors; uint8_t *data = NULL; uint8_t *buf = NULL; if (!is_request_lun_aligned(sector_num, nb_sectors, iscsilun)) { return -EINVAL; } lba = sector_qemu2lun(sector_num, iscsilun); num_sectors = sector_qemu2lun(nb_sectors, iscsilun); #if !defined(LIBISCSI_FEATURE_IOVECTOR) /* if the iovec only contains one buffer we can pass it directly */ if (iov->niov == 1) { data = iov->iov[0].iov_base; } else { size_t size = MIN(nb_sectors * BDRV_SECTOR_SIZE, iov->size); buf = g_malloc(size); qemu_iovec_to_buf(iov, 0, buf, size); data = buf; } #endif iscsi_co_init_iscsitask(iscsilun, &iTask); retry: if (iscsilun->use_16_for_rw) { iTask.task = iscsi_write16_task(iscsilun->iscsi, iscsilun->lun, lba, data, num_sectors * iscsilun->block_size, iscsilun->block_size, 0, 0, 0, 0, 0, iscsi_co_generic_cb, &iTask); } else { iTask.task = iscsi_write10_task(iscsilun->iscsi, iscsilun->lun, lba, data, num_sectors * iscsilun->block_size, iscsilun->block_size, 0, 0, 0, 0, 0, iscsi_co_generic_cb, &iTask); } if (iTask.task == NULL) { g_free(buf); return -ENOMEM; } #if defined(LIBISCSI_FEATURE_IOVECTOR) scsi_task_set_iov_out(iTask.task, (struct scsi_iovec *) iov->iov, iov->niov); #endif while (!iTask.complete) { iscsi_set_events(iscsilun); qemu_coroutine_yield(); } if (iTask.task != NULL) { scsi_free_scsi_task(iTask.task); iTask.task = NULL; } if (iTask.do_retry) { iTask.complete = 0; goto retry; } g_free(buf); if (iTask.status != SCSI_STATUS_GOOD) { return -EIO; } iscsi_allocationmap_set(iscsilun, sector_num, nb_sectors); return 0; }