/*
   Copyright (c) 2015 SanDisk Corp.

   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 <string.h>
#include <stdlib.h>

#include <CUnit/CUnit.h>

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

void
test_extendedcopy_simple(void)
{
	int ret;
	int tgt_desc_len = 0, seg_desc_len = 0, offset = XCOPY_DESC_OFFSET;
	struct iscsi_data data;
	unsigned char *xcopybuf;
	unsigned char *buf1 = malloc(2048*block_size);
	unsigned char *buf2 = malloc(2048*block_size);

	logging(LOG_VERBOSE, LOG_BLANK_LINE);
	logging(LOG_VERBOSE,
			"Test EXTENDED COPY of 2048 blocks from start of LUN to end of LUN");

	CHECK_FOR_DATALOSS;

	logging(LOG_VERBOSE, "Write 2048 blocks of 'A' at LBA:0");
	memset(buf1, 'A', 2048*block_size);
	ret = write16(sd, 0, 2048*block_size, block_size, 0, 0, 0, 0, 0,
			buf1, EXPECT_STATUS_GOOD);
	if (ret == -2) {
		logging(LOG_NORMAL, "[SKIPPED] WRITE16 is not implemented.");
		CU_PASS("WRITE16 is not implemented.");
		goto finished;
	}
	CU_ASSERT_EQUAL(ret, 0);

	data.size = XCOPY_DESC_OFFSET +
		get_desc_len(IDENT_DESCR_TGT_DESCR) +
		get_desc_len(BLK_TO_BLK_SEG_DESCR);
	data.data = alloca(data.size);
	xcopybuf = data.data;
	memset(xcopybuf, 0, data.size);

	/* Initialize target descriptor list with one target descriptor */
	offset += populate_tgt_desc(xcopybuf+offset, IDENT_DESCR_TGT_DESCR,
			LU_ID_TYPE_LUN, 0, 0, 0, 0, sd);
	tgt_desc_len = offset - XCOPY_DESC_OFFSET;

	/* Iniitialize segment descriptor list with one segment descriptor */
	offset += populate_seg_desc_b2b(xcopybuf+offset, 0, 0, 0, 0,
			2048, 0, num_blocks - 2048);
	seg_desc_len = offset - XCOPY_DESC_OFFSET - tgt_desc_len;

	/* Initialize the parameter list header */
	populate_param_header(xcopybuf, 1, 0, LIST_ID_USAGE_DISCARD, 0,
			tgt_desc_len, seg_desc_len, 0);

	ret = extendedcopy(sd, &data, EXPECT_STATUS_GOOD);
	if (ret == -2) {
		CU_PASS("[SKIPPED] Target does not support "
				"EXTENDED_COPY. Skipping test");
		goto finished;
	}
	CU_ASSERT_EQUAL(ret, 0);

	logging(LOG_VERBOSE, "Read 2048 blocks from end of the LUN");
	ret = read16(sd, NULL, num_blocks - 2048, 2048*block_size,
			block_size, 0, 0, 0, 0, 0, buf2,
			EXPECT_STATUS_GOOD);
	CU_ASSERT_EQUAL(ret, 0);

	ret = memcmp(buf1, buf2, 2048);
	if (ret != 0)
		CU_FAIL("Blocks were not copied correctly");

 finished:
	free(buf1);
	free(buf2);
}