void
test_compareandwrite_miscompare(void)
{
int i, ret;
unsigned j;
unsigned char *buf = alloca(2 * 256 * block_size);
int maxbl;
CHECK_FOR_DATALOSS;
CHECK_FOR_SBC;
if (inq_bl && inq_bl->max_cmp) {
maxbl = inq_bl->max_cmp;
} else {
/* Assume we are not limited */
maxbl = 256;
}
logging(LOG_VERBOSE, LOG_BLANK_LINE);
logging(LOG_VERBOSE, "Test COMPARE_AND_WRITE of 1-256 blocks at the "
"start of the LUN. One Byte miscompare in the final block.");
for (i = 1; i < 256; i++) {
logging(LOG_VERBOSE, "Write %d blocks of 'A' at LBA:0", i);
memset(buf, 'A', 2 * i * block_size);
if (maximum_transfer_length && maximum_transfer_length < i) {
break;
}
ret = write16(iscsic, tgt_lun, 0, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
if (ret == -2) {
logging(LOG_NORMAL, "[SKIPPED] WRITE16 is not implemented.");
CU_PASS("WRITE16 is not implemented.");
return;
}
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Change byte 27 from the end to 'C' so that it does not match.");
buf[i * block_size - 27] = 'C';
if (i > maxbl) {
logging(LOG_VERBOSE, "Number of blocks %d is greater than "
"BlockLimits.MaximumCompareAndWriteLength(%d). "
"Command should fail with INVALID_FIELD_IN_CDB",
i, maxbl);
ret = compareandwrite_invalidfieldincdb(iscsic, tgt_lun, 0,
buf, 2 * i * block_size, block_size,
0, 0, 0, 0);
if (ret == -2) {
CU_PASS("[SKIPPED] Target does not support "
"COMPARE_AND_WRITE. Skipping test");
return;
}
CU_ASSERT_EQUAL(ret, 0);
continue;
}
memset(buf + i * block_size, 'B', i * block_size);
logging(LOG_VERBOSE, "Overwrite %d blocks with 'B' "
"at LBA:0 (if they all contain 'A')", i);
ret = compareandwrite_miscompare(iscsic, tgt_lun, 0,
buf, 2 * i * block_size, block_size, 0, 0, 0, 0);
if (ret == -2) {
CU_PASS("[SKIPPED] Target does not support "
"COMPARE_AND_WRITE. Skipping test");
return;
}
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Read %d blocks at LBA:0 and verify "
"they are still unchanged as 'A'", i);
ret = read16(iscsic, tgt_lun, 0, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
CU_ASSERT_EQUAL(ret, 0);
for (j = 0; j < i * block_size; j++) {
if (buf[j] != 'A') {
logging(LOG_VERBOSE, "[FAILED] Data changed "
"eventhough there was a miscompare");
CU_FAIL("Block was written to");
return;
}
}
}
logging(LOG_VERBOSE, "Test COMPARE_AND_WRITE of 1-256 blocks at the "
"end of the LUN");
for (i = 1; i < 256; i++) {
logging(LOG_VERBOSE, "Write %d blocks of 'A' at LBA:%" PRIu64,
i, num_blocks - i);
memset(buf, 'A', 2 * i * block_size);
if (maximum_transfer_length && maximum_transfer_length < i) {
break;
}
ret = write16(iscsic, tgt_lun, num_blocks - i, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Change byte 27 from the end to 'C' so that it does not match.");
buf[i * block_size - 27] = 'C';
if (i > maxbl) {
logging(LOG_VERBOSE, "Number of blocks %d is greater than "
"BlockLimits.MaximumCompareAndWriteLength(%d). "
"Command should fail with INVALID_FIELD_IN_CDB",
i, maxbl);
ret = compareandwrite_invalidfieldincdb(iscsic, tgt_lun, 0,
buf, 2 * i * block_size, block_size,
0, 0, 0, 0);
CU_ASSERT_EQUAL(ret, 0);
continue;
}
memset(buf + i * block_size, 'B', i * block_size);
logging(LOG_VERBOSE, "Overwrite %d blocks with 'B' "
"at LBA:%" PRIu64 " (if they all contain 'A')",
i, num_blocks - i);
ret = compareandwrite_miscompare(iscsic, tgt_lun,
num_blocks - i,
buf, 2 * i * block_size, block_size, 0, 0, 0, 0);
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Read %d blocks at LBA:%" PRIu64
"they are still unchanged as 'A'",
i, num_blocks - i);
ret = read16(iscsic, tgt_lun, num_blocks - i, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
CU_ASSERT_EQUAL(ret, 0);
for (j = 0; j < i * block_size; j++) {
if (buf[j] != 'A') {
logging(LOG_VERBOSE, "[FAILED] Data changed "
"eventhough there was a miscompare");
CU_FAIL("Block was written to");
return;
}
}
}
}
void
test_compareandwrite_miscompare(void)
{
int i, ret;
unsigned j;
unsigned char *buf = alloca(2 * 256 * block_size);
CHECK_FOR_DATALOSS;
CHECK_FOR_SBC;
logging(LOG_VERBOSE, LOG_BLANK_LINE);
logging(LOG_VERBOSE, "Test COMPARE_AND_WRITE of 1-256 blocks at the "
"start of the LUN. One Byte miscompare in the final block.");
for (i = 1; i < 256; i++) {
logging(LOG_VERBOSE, "Write %d blocks of 'A' at LBA:0", i);
memset(buf, 'A', 2 * i * block_size);
if (maximum_transfer_length && maximum_transfer_length < i) {
break;
}
ret = write16(iscsic, tgt_lun, 0, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
if (ret == -2) {
logging(LOG_NORMAL, "[SKIPPED] WRITE16 is not implemented.");
CU_PASS("WRITE16 is not implemented.");
return;
}
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Change byte 27 from the end to 'C' so that it does not match.");
buf[i * block_size - 27] = 'C';
memset(buf + i * block_size, 'B', i * block_size);
logging(LOG_VERBOSE, "Overwrite %d blocks with 'B' "
"at LBA:0 (if they all contain 'A')", i);
ret = compareandwrite_miscompare(iscsic, tgt_lun, 0,
buf, 2 * i * block_size, block_size, 0, 0, 0, 0);
if (ret == -2) {
CU_PASS("[SKIPPED] Target does not support "
"COMPARE_AND_WRITE. Skipping test");
return;
}
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Read %d blocks at LBA:0 and verify "
"they are still unchanged as 'A'", i);
ret = read16(iscsic, tgt_lun, 0, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
CU_ASSERT_EQUAL(ret, 0);
for (j = 0; j < i * block_size; j++) {
if (buf[j] != 'A') {
logging(LOG_VERBOSE, "[FAILED] Data changed "
"eventhough there was a miscompare");
CU_FAIL("Block was written to");
return;
}
}
}
logging(LOG_VERBOSE, "Test COMPARE_AND_WRITE of 1-256 blocks at the "
"end of the LUN");
for (i = 1; i < 256; i++) {
logging(LOG_VERBOSE, "Write %d blocks of 'A' at LBA:%" PRIu64,
i, num_blocks - i);
memset(buf, 'A', 2 * i * block_size);
if (maximum_transfer_length && maximum_transfer_length < i) {
break;
}
ret = write16(iscsic, tgt_lun, num_blocks - i, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Change byte 27 from the end to 'C' so that it does not match.");
buf[i * block_size - 27] = 'C';
memset(buf + i * block_size, 'B', i * block_size);
logging(LOG_VERBOSE, "Overwrite %d blocks with 'B' "
"at LBA:%" PRIu64 " (if they all contain 'A')",
i, num_blocks - i);
ret = compareandwrite_miscompare(iscsic, tgt_lun,
num_blocks - i,
buf, 2 * i * block_size, block_size, 0, 0, 0, 0);
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "Read %d blocks at LBA:%" PRIu64
"they are still unchanged as 'A'",
i, num_blocks - i);
ret = read16(iscsic, tgt_lun, num_blocks - i, i * block_size,
block_size, 0, 0, 0, 0, 0, buf);
CU_ASSERT_EQUAL(ret, 0);
for (j = 0; j < i * block_size; j++) {
if (buf[j] != 'A') {
logging(LOG_VERBOSE, "[FAILED] Data changed "
"eventhough there was a miscompare");
CU_FAIL("Block was written to");
return;
}
}
}
}
