libiscsi/test-tool/test_extendedcopy_descr_limits.c

/*
   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"

int init_xcopy_descr(unsigned char *buf, int offset, int num_tgt_desc,
		int num_seg_desc, int *tgt_desc_len, int *seg_desc_len)
{
	int i;

	/* Initialize target descriptor list with num_tgt_desc
	 * target descriptor */
	for (i = 0; i < num_tgt_desc; i++)
		offset += populate_tgt_desc(buf+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 num_seg_desc
	 * segment descriptor */
	for (i = 0; i < num_seg_desc; i++)
		offset += populate_seg_desc_b2b(buf+offset, 0, 0, 0, 0,
				2048, 0, num_blocks - 2048);
	*seg_desc_len = offset - XCOPY_DESC_OFFSET - *tgt_desc_len;

	return offset;
}

void
test_extendedcopy_descr_limits(void)
{
	int ret;
	struct iscsi_data data;
	unsigned char *xcopybuf;
	struct scsi_copy_results_op_params *opp;
	int tgt_desc_len = 0, seg_desc_len = 0;
	unsigned int alloc_len;

	logging(LOG_VERBOSE, LOG_BLANK_LINE);
	logging(LOG_VERBOSE, "Test EXTENDED COPY descriptor limits");

	CHECK_FOR_DATALOSS;

	logging(LOG_VERBOSE, "Issue RECEIVE COPY RESULTS (OPERATING PARAMS)");
	ret = receive_copy_results(sd, SCSI_COPY_RESULTS_OP_PARAMS, 0,
			(void **)&opp, EXPECT_STATUS_GOOD);
	if (ret < 0) {
		CU_PASS("[SKIPPED] Target does not support "
				"RECEIVE_COPY_RESULTS. Skipping test");
		return;
	}
	CU_ASSERT_EQUAL(ret, 0);

	/* Allocate buffer to accommodate (MAX+1) target and
	 * segment descriptors */
	alloc_len = XCOPY_DESC_OFFSET +
		(opp->max_target_desc_count+1) *
		get_desc_len(IDENT_DESCR_TGT_DESCR) +
		(opp->max_segment_desc_count+1) *
		get_desc_len(BLK_TO_BLK_SEG_DESCR);
	data.data = alloca(alloc_len);
	xcopybuf = data.data;
	memset(xcopybuf, 0, alloc_len);

	logging(LOG_VERBOSE,
			"Test sending more than supported target descriptors");
	data.size = init_xcopy_descr(xcopybuf, XCOPY_DESC_OFFSET,
			(opp->max_target_desc_count+1), 1,
			&tgt_desc_len, &seg_desc_len);
	populate_param_header(xcopybuf, 1, 0, 0, 0,
			tgt_desc_len, seg_desc_len, 0);
	ret = extendedcopy(sd, &data, EXPECT_TOO_MANY_DESCR);
	if (ret == -2) {
		CU_PASS("[SKIPPED] Target does not support "
				"EXTENDED_COPY. Skipping test");
		return;
	}
	CU_ASSERT_EQUAL(ret, 0);

	logging(LOG_VERBOSE,
			"Test sending more than supported segment descriptors");
	memset(xcopybuf, 0, alloc_len);
	data.size = init_xcopy_descr(xcopybuf, XCOPY_DESC_OFFSET, 1,
			(opp->max_segment_desc_count+1),
			&tgt_desc_len, &seg_desc_len);
	populate_param_header(xcopybuf, 2, 0, 0, 0,
			tgt_desc_len, seg_desc_len, 0);
	ret = extendedcopy(sd, &data, EXPECT_TOO_MANY_DESCR);
	CU_ASSERT_EQUAL(ret, 0);

	logging(LOG_VERBOSE,
			"Test sending descriptors > Maximum Descriptor List Length");
	memset(xcopybuf, 0, alloc_len);
	if (opp->max_desc_list_length < alloc_len) {
		data.size = init_xcopy_descr(xcopybuf, XCOPY_DESC_OFFSET,
				(opp->max_target_desc_count+1),
				(opp->max_segment_desc_count+1),
				&tgt_desc_len, &seg_desc_len);
		populate_param_header(xcopybuf, 3, 0, 0, 0,
				tgt_desc_len, seg_desc_len, 0);
		ret = extendedcopy(sd, &data, EXPECT_PARAM_LIST_LEN_ERR);
		CU_ASSERT_EQUAL(ret, 0);
	}
}