e6f2ce306c
Simulate VMware ESXi behaviour in issuing COMPARE AND WRITE requests against unwritten ranges. Signed-off-by: David Disseldorp <ddiss@suse.de>
79 lines
2.3 KiB
C
79 lines
2.3 KiB
C
/* -*- mode:c; tab-width:8; c-basic-offset:8; indent-tabs-mode:nil; -*- */
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/*
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Copyright (C) SUSE LINUX GmbH 2016
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Copyright (C) 2013 Ronnie Sahlberg <ronniesahlberg@gmail.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <inttypes.h>
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#include <stdlib.h>
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#include <CUnit/CUnit.h>
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#include "iscsi.h"
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#include "scsi-lowlevel.h"
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#include "iscsi-support.h"
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#include "iscsi-test-cu.h"
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void
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test_compareandwrite_unwritten(void)
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{
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int i;
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CHECK_FOR_DATALOSS;
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CHECK_FOR_SBC;
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logging(LOG_VERBOSE, LOG_BLANK_LINE);
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logging(LOG_VERBOSE, "Test COMPARE_AND_WRITE of 1-256 blocks at the "
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"start of the LUN, 1 block at a time");
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for (i = 1; i < 256; i++) {
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int caw_ret;
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unsigned char read_buf[block_size];
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/* semi-unique 'compare' buffer to trigger miscompare */
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memset(scratch, '%', block_size);
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memset(scratch + block_size, 'B', block_size);
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caw_ret = compareandwrite(sd, i, scratch, 2 * block_size,
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block_size,
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0, 0, 0, 0,
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EXPECT_MISCOMPARE);
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if (caw_ret == -2) {
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CU_PASS("[SKIPPED] COMPARE AND WRITE not supported");
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return;
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}
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READ16(sd, NULL, i, block_size,
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block_size, 0, 0, 0, 0, 0, read_buf,
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EXPECT_STATUS_GOOD);
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if (caw_ret == 0) {
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/* miscompare - confirm unwritten block doesn't match compare buf */
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CU_ASSERT_NOT_EQUAL(memcmp(read_buf, scratch,
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block_size), 0);
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} else {
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/*
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* unexpected CAW success, or failure with an ASCQ that
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* doesn't indicate miscompare - tolerate only the
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* former, by checking that the range now carries data
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* matching the CAW write buffer.
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*/
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CU_ASSERT_EQUAL(memcmp(read_buf, scratch + block_size,
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block_size), 0);
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}
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}
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}
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