iscsi_target_parameters.c

/*******************************************************************************
 * This file contains main functions related to iSCSI Parameter negotiation.
 *
 * \u00a9 Copyright 2007-2011 RisingTide Systems LLC.
 *
 * Licensed to the Linux Foundation under the General Public License (GPL) version 2.
 *
 * Author: Nicholas A. Bellinger <nab@linux-iscsi.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 ******************************************************************************/

#include <linux/slab.h>

#include "iscsi_target_core.h"
#include "iscsi_target_util.h"
#include "iscsi_target_parameters.h"

int iscsi_login_rx_data(
	struct iscsi_conn *conn,
	char *buf,
	int length)
{
	int rx_got;
	struct kvec iov;

	memset(&iov, 0, sizeof(struct kvec));
	iov.iov_len	= length;
	iov.iov_base	= buf;

	/*
	 * Initial Marker-less Interval.
	 * Add the values regardless of IFMarker/OFMarker, considering
	 * it may not be negoitated yet.
	 */
	conn->of_marker += length;

	rx_got = rx_data(conn, &iov, 1, length);
	if (rx_got != length) {
		pr_err("rx_data returned %d, expecting %d.\n",
				rx_got, length);
		return -1;
	}

	return 0 ;
}

int iscsi_login_tx_data(
	struct iscsi_conn *conn,
	char *pdu_buf,
	char *text_buf,
	int text_length)
{
	int length, tx_sent;
	struct kvec iov[2];

	length = (ISCSI_HDR_LEN + text_length);

	memset(&iov[0], 0, 2 * sizeof(struct kvec));
	iov[0].iov_len		= ISCSI_HDR_LEN;
	iov[0].iov_base		= pdu_buf;
	iov[1].iov_len		= text_length;