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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"
struct tests_async_abort_state {
struct scsi_task *wtask;
uint32_t wr_cancelled;
uint32_t wr_good;
uint32_t abort_ok;
uint32_t abort_bad_itt;
};
static void
test_async_write_cb(struct iscsi_context *iscsi __attribute__((unused)),
int status, void *command_data,
void *private_data)
{
struct scsi_task *wtask = command_data;
struct tests_async_abort_state *state = private_data;
if (status == SCSI_STATUS_GOOD) {
state->wr_good++;
logging(LOG_VERBOSE, "WRITE10 successful: (CmdSN=0x%x, "
"ITT=0x%x)", wtask->cmdsn, wtask->itt);
} else if (status == SCSI_STATUS_CANCELLED) {
state->wr_cancelled++;
logging(LOG_VERBOSE, "WRITE10 cancelled: (CmdSN=0x%x, "
"ITT=0x%x)", wtask->cmdsn, wtask->itt);
} else {
CU_ASSERT_NOT_EQUAL(status, SCSI_STATUS_CHECK_CONDITION);
}
}
static void
test_async_abort_cb(struct iscsi_context *iscsi __attribute__((unused)),
int status, void *command_data,
void *private_data)
{
uint32_t tmf_response;
struct tests_async_abort_state *state = private_data;
/* command_data NULL if a reconnect occured. see iscsi_reconnect_cb() */
CU_ASSERT_PTR_NOT_NULL_FATAL(command_data);
tmf_response = *(uint32_t *)command_data;
logging(LOG_VERBOSE, "ABORT TASK: TMF response %d for"
" RefCmdSN=0x%x, RefITT=0x%x",
tmf_response, state->wtask->cmdsn, state->wtask->itt);
if (tmf_response == ISCSI_TMR_FUNC_COMPLETE) {
state->abort_ok++;
logging(LOG_VERBOSE, "ABORT TASK completed");
} else if (tmf_response == ISCSI_TMR_TASK_DOES_NOT_EXIST) {
/* expected if the write has already been handled by the tgt */
state->abort_bad_itt++;
logging(LOG_VERBOSE, "ABORT TASK bad ITT");
} else {
logging(LOG_NORMAL, "ABORT TASK: unexpected TMF response %d for"
" RefCmdSN=0x%x, RefITT=0x%x",
tmf_response, state->wtask->cmdsn, state->wtask->itt);
CU_ASSERT_FATAL((tmf_response != ISCSI_TMR_FUNC_COMPLETE)
&& (tmf_response != ISCSI_TMR_TASK_DOES_NOT_EXIST));
}
CU_ASSERT_NOT_EQUAL(status, SCSI_STATUS_CHECK_CONDITION);
}
void
test_async_abort_simple(void)
{
int ret;
struct tests_async_abort_state state = { NULL, 0, 0, 0, 0 };
int blocks_per_io = 8;
unsigned char *buf;
uint64_t timeout_sec;
CHECK_FOR_DATALOSS;
CHECK_FOR_SBC;
CHECK_FOR_ISCSI(sd);
if (maximum_transfer_length
&& (maximum_transfer_length < (int)(blocks_per_io))) {
CU_PASS("[SKIPPED] device too small for async_abort test");
return;
}
buf = calloc(block_size, blocks_per_io);
CU_ASSERT(buf != NULL);
if (!buf)
return;
/* queue and dispatch write before the abort */
state.wtask = scsi_cdb_write10(0, blocks_per_io * block_size,
block_size, 0, 0, 0, 0, 0);
CU_ASSERT_PTR_NOT_NULL_FATAL(state.wtask);
ret = scsi_task_add_data_out_buffer(state.wtask,
blocks_per_io * block_size,
buf);
CU_ASSERT_EQUAL(ret, 0);
ret = iscsi_scsi_command_async(sd->iscsi_ctx, sd->iscsi_lun,
state.wtask, test_async_write_cb, NULL,
&state);
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "WRITE10 queued: (CmdSN=0x%x, ITT=0x%x)",
state.wtask->cmdsn, state.wtask->itt);
CU_ASSERT_EQUAL(iscsi_out_queue_length(sd->iscsi_ctx), 1);
logging(LOG_VERBOSE, "dispatching out queue...");
while ((uint32_t)iscsi_out_queue_length(sd->iscsi_ctx) > 0) {
struct pollfd pfd;
pfd.fd = iscsi_get_fd(sd->iscsi_ctx);
pfd.events = POLLOUT; /* only send */
ret = poll(&pfd, 1, 1000);
CU_ASSERT_NOT_EQUAL(ret, -1);
ret = iscsi_service(sd->iscsi_ctx, pfd.revents);
CU_ASSERT_EQUAL(ret, 0);
}
logging(LOG_VERBOSE, "dispatched");
/*
* queue abort - shouldn't cancel the dispatched task. TMF req should
* be sent to the target.
*/
ret = iscsi_task_mgmt_async(sd->iscsi_ctx,
state.wtask->lun, ISCSI_TM_ABORT_TASK,
state.wtask->itt, state.wtask->cmdsn,
test_async_abort_cb, &state);
CU_ASSERT_EQUAL(ret, 0);
logging(LOG_VERBOSE, "ABORT queued: (RefCmdSN=0x%x, "
"RefITT=0x%x)", state.wtask->cmdsn, state.wtask->itt);
/*
* wait for all responses, timeout in 5 seconds. Expected responses:
* + WRITE:good, ABORT:bad_itt - write completed before abort
* + WRITE:no-response, ABORT:ok - write aborted
*/
logging(LOG_VERBOSE, "dispatching abort and handling responses...");
timeout_sec = test_get_clock_sec() + 5;
while (test_get_clock_sec() <= timeout_sec) {
struct pollfd pfd;
pfd.fd = iscsi_get_fd(sd->iscsi_ctx);
pfd.events = iscsi_which_events(sd->iscsi_ctx);
ret = poll(&pfd, 1, 1000);
CU_ASSERT_NOT_EQUAL(ret, -1);
ret = iscsi_service(sd->iscsi_ctx, pfd.revents);
CU_ASSERT_EQUAL(ret, 0);
if (((state.wr_good == 1) && (state.abort_bad_itt == 1))
|| (state.abort_ok == 1)) {
logging(LOG_VERBOSE, "received all expected responses");
break;
}
}
logging(LOG_VERBOSE, "%d IOs completed, %d aborts successful, "
"%d aborts unsuccessful",
state.wr_good, state.abort_ok, state.abort_bad_itt);
if (state.abort_ok == 1) {
CU_ASSERT_EQUAL(state.wr_good, 0);
CU_ASSERT_EQUAL(state.wr_cancelled, 0);
CU_ASSERT_EQUAL(state.abort_bad_itt, 0);
} else if (state.abort_bad_itt == 1) {
CU_ASSERT_EQUAL(state.wr_good, 1);
CU_ASSERT_EQUAL(state.wr_cancelled, 0);
CU_ASSERT_EQUAL(state.abort_ok, 0);
} else {
CU_FAIL("unexpected WRITE/ABORT state");
}
/* Avoid that callbacks get invoked after this test finished */
iscsi_logout_sync(sd->iscsi_ctx);
iscsi_destroy_context(sd->iscsi_ctx);
scsi_free_scsi_task(state.wtask);
sd->iscsi_ctx = NULL;
free(buf);
}
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