Ejemplo n.º 1
0
/**
 * iscsi_iser_task_init - Initialize task
 * @task: iscsi task
 *
 * Initialize the task for the scsi command or mgmt command.
 */
static int
iscsi_iser_task_init(struct iscsi_task *task)
{
	struct iscsi_iser_task *iser_task = task->dd_data;

	if (iser_initialize_task_headers(task, &iser_task->desc))
			return -ENOMEM;

	/* mgmt task */
	if (!task->sc)
		return 0;

	iser_task->command_sent = 0;
	iser_task_rdma_init(iser_task);
	return 0;
}
Ejemplo n.º 2
0
/**
 * iscsi_iser_task_init() - Initialize iscsi-iser task
 * @task: iscsi task
 *
 * Initialize the task for the scsi command or mgmt command.
 *
 * Return: Returns zero on success or -ENOMEM when failing
 *         to init task headers (dma mapping error).
 */
static int
iscsi_iser_task_init(struct iscsi_task *task)
{
	struct iscsi_iser_task *iser_task = task->dd_data;
	int ret;

	ret = iser_initialize_task_headers(task, &iser_task->desc);
	if (ret) {
		iser_err("Failed to init task %p, err = %d\n",
			 iser_task, ret);
		return ret;
	}

	/* mgmt task */
	if (!task->sc)
		return 0;

	iser_task->command_sent = 0;
	iser_task_rdma_init(iser_task);
	iser_task->sc = task->sc;

	return 0;
}
/**
 * iser_send_data_out - send data out PDU
 */
int iser_send_data_out(struct iscsi_conn *conn,
		       struct iscsi_task *task,
		       struct iscsi_data *hdr)
{
	struct iser_conn *iser_conn = conn->dd_data;
	struct iscsi_iser_task *iser_task = task->dd_data;
	struct iser_tx_desc *tx_desc = NULL;
	struct iser_mem_reg *mem_reg;
	unsigned long buf_offset;
	unsigned long data_seg_len;
	uint32_t itt;
	int err;
	struct ib_sge *tx_dsg;

	itt = (__force uint32_t)hdr->itt;
	data_seg_len = ntoh24(hdr->dlength);
	buf_offset   = ntohl(hdr->offset);

	iser_dbg("%s itt %d dseg_len %d offset %d\n",
		 __func__,(int)itt,(int)data_seg_len,(int)buf_offset);

	tx_desc = kmem_cache_zalloc(ig.desc_cache, GFP_ATOMIC);
	if (tx_desc == NULL) {
		iser_err("Failed to alloc desc for post dataout\n");
		return -ENOMEM;
	}

	tx_desc->type = ISCSI_TX_DATAOUT;
	tx_desc->iser_header.flags = ISER_VER;
	memcpy(&tx_desc->iscsi_header, hdr, sizeof(struct iscsi_hdr));

	/* build the tx desc */
	err = iser_initialize_task_headers(task, tx_desc);
	if (err)
		goto send_data_out_error;

	mem_reg = &iser_task->rdma_reg[ISER_DIR_OUT];
	tx_dsg = &tx_desc->tx_sg[1];
	tx_dsg->addr = mem_reg->sge.addr + buf_offset;
	tx_dsg->length = data_seg_len;
	tx_dsg->lkey = mem_reg->sge.lkey;
	tx_desc->num_sge = 2;

	if (buf_offset + data_seg_len > iser_task->data[ISER_DIR_OUT].data_len) {
		iser_err("Offset:%ld & DSL:%ld in Data-Out "
			 "inconsistent with total len:%ld, itt:%d\n",
			 buf_offset, data_seg_len,
			 iser_task->data[ISER_DIR_OUT].data_len, itt);
		err = -EINVAL;
		goto send_data_out_error;
	}
	iser_dbg("data-out itt: %d, offset: %ld, sz: %ld\n",
		 itt, buf_offset, data_seg_len);


	err = iser_post_send(&iser_conn->ib_conn, tx_desc, true);
	if (!err)
		return 0;

send_data_out_error:
	kmem_cache_free(ig.desc_cache, tx_desc);
	iser_err("conn %p failed err %d\n", conn, err);
	return err;
}