/* 
   Copyright (C) 2013 Ronnie Sahlberg <ronniesahlberg@gmail.com>
   
   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 <alloca.h>

#include <CUnit/CUnit.h>

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


void
test_writesame16_unmap_until_end(void)
{
	int i, ret;
	unsigned int j;
	unsigned char *buf = alloca(256 * block_size);

	CHECK_FOR_DATALOSS;
	CHECK_FOR_THIN_PROVISIONING;
	CHECK_FOR_LBPWS;
	CHECK_FOR_SBC;

	logging(LOG_VERBOSE, LOG_BLANK_LINE);
	logging(LOG_VERBOSE, "Test WRITESAME16 of 1-256 blocks at the end of the LUN by setting number-of-blocks==0");
	for (i = 1; i <= 256; i++) {
		logging(LOG_VERBOSE, "Write %d blocks of 0xFF", i);
		memset(buf, 0xff, block_size * i);
		ret = write16(iscsic, tgt_lun, num_blocks - i,
			      i * block_size, block_size,
			      0, 0, 0, 0, 0, buf);

		logging(LOG_VERBOSE, "Unmap %d blocks using WRITESAME16", i);
		ret = writesame16(iscsic, tgt_lun, num_blocks - i,
				  0, i,
				  0, 1, 0, 0, NULL);
		if (ret == -2) {
			logging(LOG_NORMAL, "[SKIPPED] WRITESAME16 is not implemented.");
			CU_PASS("[SKIPPED] Target does not support WRITESAME16. Skipping test");
			return;
		}
		CU_ASSERT_EQUAL(ret, 0);

		if (rc16->lbprz) {
			logging(LOG_VERBOSE, "LBPRZ is set. Read the unmapped "
				"blocks back and verify they are all zero");

			logging(LOG_VERBOSE, "Read %d blocks and verify they "
				"are now zero", i);
			ret = read16(iscsic, tgt_lun, num_blocks - i,
				     i * block_size, block_size,
				     0, 0, 0, 0, 0, buf);
			for (j = 0; j < block_size * i; j++) {
				if (buf[j] != 0) {
					CU_ASSERT_EQUAL(buf[j], 0);
				}
			}
		} else {
			logging(LOG_VERBOSE, "LBPRZ is clear. Skip the read "
				"and verify zero test");
		}
	}
}