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/*
Copyright (C) SUSE LINUX GmbH 2016
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 <signal.h>
#include <poll.h>
#include <CUnit/CUnit.h>
#include "iscsi.h"
#include "scsi-lowlevel.h"
#include "iscsi-support.h"
#include "iscsi-test-cu.h"
#include "iscsi-multipath.h"
struct tests_async_read_state {
uint32_t dispatched;
uint32_t completed;
uint32_t prev_cmdsn;
};
static void
test_async_read_cb(struct iscsi_context *iscsi __attribute__((unused)),
int status, void *command_data, void *private_data)
{
struct scsi_task *atask = command_data;
struct tests_async_read_state *state = private_data;
state->completed++;
logging(LOG_VERBOSE, "READ10 completed: %d of %d (CmdSN=%d)",
state->completed, state->dispatched, atask->cmdsn);
CU_ASSERT_NOT_EQUAL(status, SCSI_STATUS_CHECK_CONDITION);
if ((state->completed > 1) && (atask->cmdsn != state->prev_cmdsn + 1)) {
logging(LOG_VERBOSE,
"out of order completion (CmdSN=%d, prev=%d)",
atask->cmdsn, state->prev_cmdsn);
}
state->prev_cmdsn = atask->cmdsn;
scsi_free_scsi_task(atask);
}
void
test_async_read(void)
{
int i, ret;
struct tests_async_read_state state = { 0, 0, 0 };
const int blocks_per_io = 8;
const int num_ios = 1000;
unsigned char *buf = NULL;
CHECK_FOR_DATALOSS;
CHECK_FOR_SBC;
CHECK_FOR_ISCSI(sd);
/* IOs in flight concurrently, so need a buffer large enough for all */
buf = calloc(block_size * blocks_per_io, num_ios);
CU_ASSERT_NOT_EQUAL(buf, NULL);
if (!buf)
goto out;
if (maximum_transfer_length
&& (maximum_transfer_length < (blocks_per_io * num_ios))) {
CU_PASS("[SKIPPED] device too small for async_read test");
goto out;
}
for (i = 0; i < num_ios; i++) {
uint32_t lba = i * blocks_per_io;
struct scsi_task *atask;
atask = scsi_cdb_read10(lba, blocks_per_io * block_size,
block_size, 0, 0, 0, 0, 0);
CU_ASSERT_PTR_NOT_NULL_FATAL(atask);
ret = scsi_task_add_data_in_buffer(atask,
blocks_per_io * block_size,
&buf[lba * block_size]);
CU_ASSERT_EQUAL(ret, 0);
ret = iscsi_scsi_command_async(sd->iscsi_ctx, sd->iscsi_lun,
atask, test_async_read_cb, NULL,
&state);
CU_ASSERT_EQUAL(ret, 0);
state.dispatched++;
logging(LOG_VERBOSE, "READ10 dispatched: %d of %d (cmdsn=%d)",
state.dispatched, num_ios, atask->cmdsn);
}
while (state.completed < state.dispatched) {
struct pollfd pfd;
pfd.fd = iscsi_get_fd(sd->iscsi_ctx);
pfd.events = iscsi_which_events(sd->iscsi_ctx);
ret = poll(&pfd, 1, -1);
CU_ASSERT_NOT_EQUAL(ret, -1);
ret = iscsi_service(sd->iscsi_ctx, pfd.revents);
CU_ASSERT_EQUAL(ret, 0);
}
out:
free(buf);
}
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