/* -*-  mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil;  -*- */
/*
   Copyright (C) 2013 Ronnie Sahlberg <ronniesahlberg@gmail.com>
   Copyright (C) 2015 David Disseldorp

   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.

   You should have received a copy of the GNU General Public License
   along with this program; if not, see <http://www.gnu.org/licenses/>.
*/

#include <stdio.h>
#include <stdlib.h>

#include <CUnit/CUnit.h>

#include "iscsi.h"
#include "scsi-lowlevel.h"
#include "iscsi-support.h"
#include "iscsi-test-cu.h"
#include "iscsi-multipath.h"

void
test_multipathio_simple(void)
{
	int write_path;
	unsigned char *write_buf = alloca(256 * block_size);
	unsigned char *read_buf = alloca(256 * block_size);

	CHECK_FOR_DATALOSS;
	CHECK_FOR_SBC;
	MPATH_SKIP_IF_UNAVAILABLE(mp_sds, mp_num_sds);

	logging(LOG_VERBOSE, LOG_BLANK_LINE);
	memset(write_buf, 0xa6, 256 * block_size);

	for (write_path = 0; write_path < mp_num_sds; write_path++) {
		int i, ret;
		int read_path;

		/* read back written data using a different path */
		read_path = (write_path + 1) % mp_num_sds;

		logging(LOG_VERBOSE,
			"Test multipath WRITE10/READ10 of 1-256 blocks using "
			"path %d", write_path);

		for (i = 1; i <= 256; i++) {
			if (maximum_transfer_length
					&& maximum_transfer_length < i) {
				break;
			}
			ret = write10(mp_sds[write_path], 0, i * block_size,
				      block_size, 0, 0, 0, 0, 0, write_buf,
				      EXPECT_STATUS_GOOD);
			if (ret == -2) {
				logging(LOG_NORMAL,
					"[SKIPPED] WRITE16 not implemented.");
				CU_PASS("WRITE16 is not implemented.");
				return;
			}
			CU_ASSERT_EQUAL(ret, 0);

			ret = read10(mp_sds[read_path], NULL, 0, i * block_size,
				     block_size, 0, 0, 0, 0, 0, read_buf,
				     EXPECT_STATUS_GOOD);
			CU_ASSERT_EQUAL(ret, 0);

			/* compare written and read data */
			CU_ASSERT_EQUAL(0,
				memcmp(write_buf, read_buf, i * block_size));
		}

	}
}