[mirror_ubuntu-eoan-kernel.git] / tools / testing / selftests / futex / functional / futex_requeue_pi.c

// SPDX-License-Identifier: GPL-2.0-or-later
/******************************************************************************
 *
 *   Copyright © International Business Machines  Corp., 2006-2008
 *
 * DESCRIPTION
 *      This test excercises the futex syscall op codes needed for requeuing
 *      priority inheritance aware POSIX condition variables and mutexes.
 *
 * AUTHORS
 *      Sripathi Kodi <sripathik@in.ibm.com>
 *      Darren Hart <dvhart@linux.intel.com>
 *
 * HISTORY
 *      2008-Jan-13: Initial version by Sripathi Kodi <sripathik@in.ibm.com>
 *      2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
 *
 *****************************************************************************/

#include <errno.h>
#include <limits.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include "atomic.h"
#include "futextest.h"
#include "logging.h"

#define TEST_NAME "futex-requeue-pi"
#define MAX_WAKE_ITERS 1000
#define THREAD_MAX 10
#define SIGNAL_PERIOD_US 100

atomic_t waiters_blocked = ATOMIC_INITIALIZER;
atomic_t waiters_woken = ATOMIC_INITIALIZER;

futex_t f1 = FUTEX_INITIALIZER;
futex_t f2 = FUTEX_INITIALIZER;
futex_t wake_complete = FUTEX_INITIALIZER;

/* Test option defaults */
static long timeout_ns;
static int broadcast;
static int owner;
static int locked;

struct thread_arg {
	long id;
	struct timespec *timeout;
	int lock;
	int ret;
};
#define THREAD_ARG_INITIALIZER { 0, NULL, 0, 0 }

void usage(char *prog)
{
	printf("Usage: %s\n", prog);
	printf("  -b	Broadcast wakeup (all waiters)\n");
	printf("  -c	Use color\n");
	printf("  -h	Display this help message\n");
	printf("  -l	Lock the pi futex across requeue\n");
	printf("  -o	Use a third party pi futex owner during requeue (cancels -l)\n");
	printf("  -t N	Timeout in nanoseconds (default: 0)\n");
	printf("  -v L	Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
	       VQUIET, VCRITICAL, VINFO);
}

int create_rt_thread(pthread_t *pth, void*(*func)(void *), void *arg,
		     int policy, int prio)
{
	int ret;
	struct sched_param schedp;
	pthread_attr_t attr;

	pthread_attr_init(&attr);
	memset(&schedp, 0, sizeof(schedp));

	ret = pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
	if (ret) {
		error("pthread_attr_setinheritsched\n", ret);
		return -1;
	}

	ret = pthread_attr_setschedpolicy(&attr, policy);
	if (ret) {
		error("pthread_attr_setschedpolicy\n", ret);
		return -1;
	}

	schedp.sched_priority = prio;
	ret = pthread_attr_setschedparam(&attr, &schedp);
	if (ret) {
		error("pthread_attr_setschedparam\n", ret);
		return -1;
	}

	ret = pthread_create(pth, &attr, func, arg);
	if (ret) {
		error("pthread_create\n", ret);
		return -1;
	}
	return 0;
}


void *waiterfn(void *arg)
{
	struct thread_arg *args = (struct thread_arg *)arg;
	futex_t old_val;

	info("Waiter %ld: running\n", args->id);
	/* Each thread sleeps for a different amount of time
	 * This is to avoid races, because we don't lock the
	 * external mutex here */
	usleep(1000 * (long)args->id);

	old_val = f1;
	atomic_inc(&waiters_blocked);
	info("Calling futex_wait_requeue_pi: %p (%u) -> %p\n",
	     &f1, f1, &f2);
	args->ret = futex_wait_requeue_pi(&f1, old_val, &f2, args->timeout,
					  FUTEX_PRIVATE_FLAG);

	info("waiter %ld woke with %d %s\n", args->id, args->ret,
	     args->ret < 0 ? strerror(errno) : "");
	atomic_inc(&waiters_woken);
	if (args->ret < 0) {
		if (args->timeout && errno == ETIMEDOUT)
			args->ret = 0;
		else {
			args->ret = RET_ERROR;
			error("futex_wait_requeue_pi\n", errno);
		}
		futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
	}
	futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);

	info("Waiter %ld: exiting with %d\n", args->id, args->ret);
	pthread_exit((void *)&args->ret);
}

void *broadcast_wakerfn(void *arg)
{
	struct thread_arg *args = (struct thread_arg *)arg;
	int nr_requeue = INT_MAX;
	int task_count = 0;
	futex_t old_val;
	int nr_wake = 1;
	int i = 0;

	info("Waker: waiting for waiters to block\n");
	while (waiters_blocked.val < THREAD_MAX)
		usleep(1000);
	usleep(1000);

	info("Waker: Calling broadcast\n");
	if (args->lock) {
		info("Calling FUTEX_LOCK_PI on mutex=%x @ %p\n", f2, &f2);
		futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
	}
 continue_requeue:
	old_val = f1;
	args->ret = futex_cmp_requeue_pi(&f1, old_val, &f2, nr_wake, nr_requeue,
				   FUTEX_PRIVATE_FLAG);
	if (args->ret < 0) {
		args->ret = RET_ERROR;
		error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
	} else if (++i < MAX_WAKE_ITERS) {
		task_count += args->ret;
		if (task_count < THREAD_MAX - waiters_woken.val)
			goto continue_requeue;
	} else {
		error("max broadcast iterations (%d) reached with %d/%d tasks woken or requeued\n",
		       0, MAX_WAKE_ITERS, task_count, THREAD_MAX);
		args->ret = RET_ERROR;
	}

	futex_wake(&wake_complete, 1, FUTEX_PRIVATE_FLAG);

	if (args->lock)
		futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);

	if (args->ret > 0)
		args->ret = task_count;

	info("Waker: exiting with %d\n", args->ret);
	pthread_exit((void *)&args->ret);
}

void *signal_wakerfn(void *arg)
{
	struct thread_arg *args = (struct thread_arg *)arg;
	unsigned int old_val;
	int nr_requeue = 0;
	int task_count = 0;
	int nr_wake = 1;
	int i = 0;

	info("Waker: waiting for waiters to block\n");
	while (waiters_blocked.val < THREAD_MAX)
		usleep(1000);
	usleep(1000);

	while (task_count < THREAD_MAX && waiters_woken.val < THREAD_MAX) {
		info("task_count: %d, waiters_woken: %d\n",
		     task_count, waiters_woken.val);
		if (args->lock) {
			info("Calling FUTEX_LOCK_PI on mutex=%x @ %p\n",
			     f2, &f2);
			futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
		}
		info("Waker: Calling signal\n");
		/* cond_signal */
		old_val = f1;
		args->ret = futex_cmp_requeue_pi(&f1, old_val, &f2,
						 nr_wake, nr_requeue,
						 FUTEX_PRIVATE_FLAG);
		if (args->ret < 0)
			args->ret = -errno;
		info("futex: %x\n", f2);
		if (args->lock) {
			info("Calling FUTEX_UNLOCK_PI on mutex=%x @ %p\n",
			     f2, &f2);
			futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
		}
		info("futex: %x\n", f2);
		if (args->ret < 0) {
			error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
			args->ret = RET_ERROR;
			break;
		}

		task_count += args->ret;
		usleep(SIGNAL_PERIOD_US);
		i++;
		/* we have to loop at least THREAD_MAX times */
		if (i > MAX_WAKE_ITERS + THREAD_MAX) {
			error("max signaling iterations (%d) reached, giving up on pending waiters.\n",
			      0, MAX_WAKE_ITERS + THREAD_MAX);
			args->ret = RET_ERROR;
			break;
		}
	}

	futex_wake(&wake_complete, 1, FUTEX_PRIVATE_FLAG);

	if (args->ret >= 0)
		args->ret = task_count;

	info("Waker: exiting with %d\n", args->ret);
	info("Waker: waiters_woken: %d\n", waiters_woken.val);
	pthread_exit((void *)&args->ret);
}

void *third_party_blocker(void *arg)
{
	struct thread_arg *args = (struct thread_arg *)arg;
	int ret2 = 0;

	args->ret = futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
	if (args->ret)
		goto out;
	args->ret = futex_wait(&wake_complete, wake_complete, NULL,
			       FUTEX_PRIVATE_FLAG);
	ret2 = futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);

 out:
	if (args->ret || ret2) {
		error("third_party_blocker() futex error", 0);
		args->ret = RET_ERROR;
	}

	pthread_exit((void *)&args->ret);
}

int unit_test(int broadcast, long lock, int third_party_owner, long timeout_ns)
{
	void *(*wakerfn)(void *) = signal_wakerfn;
	struct thread_arg blocker_arg = THREAD_ARG_INITIALIZER;
	struct thread_arg waker_arg = THREAD_ARG_INITIALIZER;
	pthread_t waiter[THREAD_MAX], waker, blocker;
	struct timespec ts, *tsp = NULL;
	struct thread_arg args[THREAD_MAX];
	int *waiter_ret;
	int i, ret = RET_PASS;

	if (timeout_ns) {
		time_t secs;

		info("timeout_ns = %ld\n", timeout_ns);
		ret = clock_gettime(CLOCK_MONOTONIC, &ts);
		secs = (ts.tv_nsec + timeout_ns) / 1000000000;
		ts.tv_nsec = ((int64_t)ts.tv_nsec + timeout_ns) % 1000000000;
		ts.tv_sec += secs;
		info("ts.tv_sec  = %ld\n", ts.tv_sec);
		info("ts.tv_nsec = %ld\n", ts.tv_nsec);
		tsp = &ts;
	}

	if (broadcast)
		wakerfn = broadcast_wakerfn;

	if (third_party_owner) {
		if (create_rt_thread(&blocker, third_party_blocker,
				     (void *)&blocker_arg, SCHED_FIFO, 1)) {
			error("Creating third party blocker thread failed\n",
			      errno);
			ret = RET_ERROR;
			goto out;
		}
	}

	atomic_set(&waiters_woken, 0);
	for (i = 0; i < THREAD_MAX; i++) {
		args[i].id = i;
		args[i].timeout = tsp;
		info("Starting thread %d\n", i);
		if (create_rt_thread(&waiter[i], waiterfn, (void *)&args[i],
				     SCHED_FIFO, 1)) {
			error("Creating waiting thread failed\n", errno);
			ret = RET_ERROR;
			goto out;
		}
	}
	waker_arg.lock = lock;
	if (create_rt_thread(&waker, wakerfn, (void *)&waker_arg,
			     SCHED_FIFO, 1)) {
		error("Creating waker thread failed\n", errno);
		ret = RET_ERROR;
		goto out;
	}

	/* Wait for threads to finish */
	/* Store the first error or failure encountered in waiter_ret */
	waiter_ret = &args[0].ret;
	for (i = 0; i < THREAD_MAX; i++)
		pthread_join(waiter[i],
			     *waiter_ret ? NULL : (void **)&waiter_ret);

	if (third_party_owner)
		pthread_join(blocker, NULL);
	pthread_join(waker, NULL);

out:
	if (!ret) {
		if (*waiter_ret)
			ret = *waiter_ret;
		else if (waker_arg.ret < 0)
			ret = waker_arg.ret;
		else if (blocker_arg.ret)
			ret = blocker_arg.ret;
	}

	return ret;
}

int main(int argc, char *argv[])
{
	int c, ret;

	while ((c = getopt(argc, argv, "bchlot:v:")) != -1) {
		switch (c) {
		case 'b':
			broadcast = 1;
			break;
		case 'c':
			log_color(1);
			break;
		case 'h':
			usage(basename(argv[0]));
			exit(0);
		case 'l':
			locked = 1;
			break;
		case 'o':
			owner = 1;
			locked = 0;
			break;
		case 't':
			timeout_ns = atoi(optarg);
			break;
		case 'v':
			log_verbosity(atoi(optarg));
			break;
		default:
			usage(basename(argv[0]));
			exit(1);
		}
	}

	ksft_print_header();
	ksft_set_plan(1);
	ksft_print_msg("%s: Test requeue functionality\n", basename(argv[0]));
	ksft_print_msg(
		"\tArguments: broadcast=%d locked=%d owner=%d timeout=%ldns\n",
		broadcast, locked, owner, timeout_ns);

	/*
	 * FIXME: unit_test is obsolete now that we parse options and the
	 * various style of runs are done by run.sh - simplify the code and move
	 * unit_test into main()
	 */
	ret = unit_test(broadcast, locked, owner, timeout_ns);

	print_result(TEST_NAME, ret);
	return ret;
}
Commit	Line	Data
2874c5fd	1	// SPDX-License-Identifier: GPL-2.0-or-later
2aa8470f DH	2	/******************************************************************************
	3	*
	4	* Copyright © International Business Machines Corp., 2006-2008
	5	*
2aa8470f DH	6	* DESCRIPTION
	7	* This test excercises the futex syscall op codes needed for requeuing
	8	* priority inheritance aware POSIX condition variables and mutexes.
	9	*
	10	* AUTHORS
	11	* Sripathi Kodi <sripathik@in.ibm.com>
	12	* Darren Hart <dvhart@linux.intel.com>
	13	*
	14	* HISTORY
	15	* 2008-Jan-13: Initial version by Sripathi Kodi <sripathik@in.ibm.com>
	16	* 2009-Nov-6: futex test adaptation by Darren Hart <dvhart@linux.intel.com>
	17	*
	18	*****************************************************************************/
	19
	20	#include <errno.h>
	21	#include <limits.h>
	22	#include <pthread.h>
	23	#include <stdio.h>
	24	#include <stdlib.h>
	25	#include <signal.h>
	26	#include <string.h>
	27	#include "atomic.h"
	28	#include "futextest.h"
	29	#include "logging.h"
	30
1f666e52	31	#define TEST_NAME "futex-requeue-pi"
2aa8470f DH	32	#define MAX_WAKE_ITERS 1000
	33	#define THREAD_MAX 10
	34	#define SIGNAL_PERIOD_US 100
	35
	36	atomic_t waiters_blocked = ATOMIC_INITIALIZER;
	37	atomic_t waiters_woken = ATOMIC_INITIALIZER;
	38
	39	futex_t f1 = FUTEX_INITIALIZER;
	40	futex_t f2 = FUTEX_INITIALIZER;
	41	futex_t wake_complete = FUTEX_INITIALIZER;
	42
	43	/* Test option defaults */
	44	static long timeout_ns;
	45	static int broadcast;
	46	static int owner;
	47	static int locked;
	48
	49	struct thread_arg {
	50	long id;
	51	struct timespec *timeout;
	52	int lock;
	53	int ret;
	54	};
	55	#define THREAD_ARG_INITIALIZER { 0, NULL, 0, 0 }
	56
	57	void usage(char *prog)
	58	{
	59	printf("Usage: %s\n", prog);
	60	printf(" -b Broadcast wakeup (all waiters)\n");
	61	printf(" -c Use color\n");
	62	printf(" -h Display this help message\n");
	63	printf(" -l Lock the pi futex across requeue\n");
	64	printf(" -o Use a third party pi futex owner during requeue (cancels -l)\n");
	65	printf(" -t N Timeout in nanoseconds (default: 0)\n");
	66	printf(" -v L Verbosity level: %d=QUIET %d=CRITICAL %d=INFO\n",
	67	VQUIET, VCRITICAL, VINFO);
	68	}
	69
	70	int create_rt_thread(pthread_t pth, void(func)(void ), void *arg,
	71	int policy, int prio)
	72	{
	73	int ret;
	74	struct sched_param schedp;
	75	pthread_attr_t attr;
	76
	77	pthread_attr_init(&attr);
	78	memset(&schedp, 0, sizeof(schedp));
	79
	80	ret = pthread_attr_setinheritsched(&attr, PTHREAD_EXPLICIT_SCHED);
	81	if (ret) {
	82	error("pthread_attr_setinheritsched\n", ret);
	83	return -1;
	84	}
	85
	86	ret = pthread_attr_setschedpolicy(&attr, policy);
	87	if (ret) {
	88	error("pthread_attr_setschedpolicy\n", ret);
	89	return -1;
	90	}
	91
	92	schedp.sched_priority = prio;
	93	ret = pthread_attr_setschedparam(&attr, &schedp);
	94	if (ret) {
	95	error("pthread_attr_setschedparam\n", ret);
96	return -1;
97	}
98
99	ret = pthread_create(pth, &attr, func, arg);
100	if (ret) {
101	error("pthread_create\n", ret);
102	return -1;
103	}
104	return 0;
105	}
106
107
108	void waiterfn(void arg)
109	{
110	struct thread_arg args = (struct thread_arg )arg;
111	futex_t old_val;
112
113	info("Waiter %ld: running\n", args->id);
114	/* Each thread sleeps for a different amount of time
115	* This is to avoid races, because we don't lock the
116	* external mutex here */
117	usleep(1000 * (long)args->id);
118
119	old_val = f1;
120	atomic_inc(&waiters_blocked);
121	info("Calling futex_wait_requeue_pi: %p (%u) -> %p\n",
122	&f1, f1, &f2);
123	args->ret = futex_wait_requeue_pi(&f1, old_val, &f2, args->timeout,
124	FUTEX_PRIVATE_FLAG);
125
126	info("waiter %ld woke with %d %s\n", args->id, args->ret,
127	args->ret < 0 ? strerror(errno) : "");
128	atomic_inc(&waiters_woken);
129	if (args->ret < 0) {
130	if (args->timeout && errno == ETIMEDOUT)
131	args->ret = 0;
132	else {
133	args->ret = RET_ERROR;
134	error("futex_wait_requeue_pi\n", errno);
135	}
136	futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
137	}
138	futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
139
140	info("Waiter %ld: exiting with %d\n", args->id, args->ret);
141	pthread_exit((void *)&args->ret);
142	}
143
144	void broadcast_wakerfn(void arg)
145	{
146	struct thread_arg args = (struct thread_arg )arg;
147	int nr_requeue = INT_MAX;
148	int task_count = 0;
149	futex_t old_val;
150	int nr_wake = 1;
151	int i = 0;
152
153	info("Waker: waiting for waiters to block\n");
154	while (waiters_blocked.val < THREAD_MAX)
155	usleep(1000);
156	usleep(1000);
157
158	info("Waker: Calling broadcast\n");
159	if (args->lock) {
160	info("Calling FUTEX_LOCK_PI on mutex=%x @ %p\n", f2, &f2);
161	futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
162	}
163	continue_requeue:
164	old_val = f1;
165	args->ret = futex_cmp_requeue_pi(&f1, old_val, &f2, nr_wake, nr_requeue,
166	FUTEX_PRIVATE_FLAG);
167	if (args->ret < 0) {
168	args->ret = RET_ERROR;
169	error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
170	} else if (++i < MAX_WAKE_ITERS) {
171	task_count += args->ret;
172	if (task_count < THREAD_MAX - waiters_woken.val)
173	goto continue_requeue;
174	} else {
175	error("max broadcast iterations (%d) reached with %d/%d tasks woken or requeued\n",
176	0, MAX_WAKE_ITERS, task_count, THREAD_MAX);
177	args->ret = RET_ERROR;
178	}
179
180	futex_wake(&wake_complete, 1, FUTEX_PRIVATE_FLAG);
181
182	if (args->lock)
183	futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
184
185	if (args->ret > 0)
186	args->ret = task_count;
187
188	info("Waker: exiting with %d\n", args->ret);
189	pthread_exit((void *)&args->ret);
190	}
191
192	void signal_wakerfn(void arg)
193	{
194	struct thread_arg args = (struct thread_arg )arg;
195	unsigned int old_val;
196	int nr_requeue = 0;
197	int task_count = 0;
198	int nr_wake = 1;
199	int i = 0;
200
201	info("Waker: waiting for waiters to block\n");
202	while (waiters_blocked.val < THREAD_MAX)
203	usleep(1000);
204	usleep(1000);
205
206	while (task_count < THREAD_MAX && waiters_woken.val < THREAD_MAX) {
207	info("task_count: %d, waiters_woken: %d\n",
208	task_count, waiters_woken.val);
209	if (args->lock) {
210	info("Calling FUTEX_LOCK_PI on mutex=%x @ %p\n",
211	f2, &f2);
212	futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
213	}
214	info("Waker: Calling signal\n");
215	/* cond_signal */
216	old_val = f1;
217	args->ret = futex_cmp_requeue_pi(&f1, old_val, &f2,
218	nr_wake, nr_requeue,
219	FUTEX_PRIVATE_FLAG);
220	if (args->ret < 0)
221	args->ret = -errno;
222	info("futex: %x\n", f2);
223	if (args->lock) {
224	info("Calling FUTEX_UNLOCK_PI on mutex=%x @ %p\n",
225	f2, &f2);
226	futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
227	}
228	info("futex: %x\n", f2);
229	if (args->ret < 0) {
230	error("FUTEX_CMP_REQUEUE_PI failed\n", errno);
231	args->ret = RET_ERROR;
232	break;
233	}
234
235	task_count += args->ret;
236	usleep(SIGNAL_PERIOD_US);
237	i++;
238	/* we have to loop at least THREAD_MAX times */
239	if (i > MAX_WAKE_ITERS + THREAD_MAX) {
240	error("max signaling iterations (%d) reached, giving up on pending waiters.\n",
241	0, MAX_WAKE_ITERS + THREAD_MAX);
242	args->ret = RET_ERROR;
243	break;
244	}
245	}
246
247	futex_wake(&wake_complete, 1, FUTEX_PRIVATE_FLAG);
248
249	if (args->ret >= 0)
250	args->ret = task_count;
251
252	info("Waker: exiting with %d\n", args->ret);
253	info("Waker: waiters_woken: %d\n", waiters_woken.val);
254	pthread_exit((void *)&args->ret);
255	}
256
257	void third_party_blocker(void arg)
258	{
259	struct thread_arg args = (struct thread_arg )arg;
260	int ret2 = 0;
261
262	args->ret = futex_lock_pi(&f2, NULL, 0, FUTEX_PRIVATE_FLAG);
263	if (args->ret)
264	goto out;
265	args->ret = futex_wait(&wake_complete, wake_complete, NULL,
266	FUTEX_PRIVATE_FLAG);
267	ret2 = futex_unlock_pi(&f2, FUTEX_PRIVATE_FLAG);
268
269	out:
270	if (args->ret \|\| ret2) {
271	error("third_party_blocker() futex error", 0);
272	args->ret = RET_ERROR;
273	}
274
275	pthread_exit((void *)&args->ret);
276	}
277
278	int unit_test(int broadcast, long lock, int third_party_owner, long timeout_ns)
279	{
280	void (wakerfn)(void *) = signal_wakerfn;
281	struct thread_arg blocker_arg = THREAD_ARG_INITIALIZER;
282	struct thread_arg waker_arg = THREAD_ARG_INITIALIZER;
283	pthread_t waiter[THREAD_MAX], waker, blocker;
284	struct timespec ts, *tsp = NULL;
285	struct thread_arg args[THREAD_MAX];
286	int *waiter_ret;
287	int i, ret = RET_PASS;
288
289	if (timeout_ns) {
290	time_t secs;
291
292	info("timeout_ns = %ld\n", timeout_ns);
293	ret = clock_gettime(CLOCK_MONOTONIC, &ts);
294	secs = (ts.tv_nsec + timeout_ns) / 1000000000;
295	ts.tv_nsec = ((int64_t)ts.tv_nsec + timeout_ns) % 1000000000;
296	ts.tv_sec += secs;
297	info("ts.tv_sec = %ld\n", ts.tv_sec);
298	info("ts.tv_nsec = %ld\n", ts.tv_nsec);
299	tsp = &ts;
300	}
301
302	if (broadcast)
303	wakerfn = broadcast_wakerfn;
304
305	if (third_party_owner) {
306	if (create_rt_thread(&blocker, third_party_blocker,
307	(void *)&blocker_arg, SCHED_FIFO, 1)) {
308	error("Creating third party blocker thread failed\n",
309	errno);
310	ret = RET_ERROR;
311	goto out;
312	}
313	}
314
315	atomic_set(&waiters_woken, 0);
316	for (i = 0; i < THREAD_MAX; i++) {
317	args[i].id = i;
318	args[i].timeout = tsp;
319	info("Starting thread %d\n", i);
320	if (create_rt_thread(&waiter[i], waiterfn, (void *)&args[i],
321	SCHED_FIFO, 1)) {
322	error("Creating waiting thread failed\n", errno);
323	ret = RET_ERROR;
324	goto out;
325	}
326	}
327	waker_arg.lock = lock;
328	if (create_rt_thread(&waker, wakerfn, (void *)&waker_arg,
329	SCHED_FIFO, 1)) {
330	error("Creating waker thread failed\n", errno);
331	ret = RET_ERROR;
332	goto out;
333	}
334
335	/* Wait for threads to finish */
336	/* Store the first error or failure encountered in waiter_ret */
337	waiter_ret = &args[0].ret;
338	for (i = 0; i < THREAD_MAX; i++)
339	pthread_join(waiter[i],
340	waiter_ret ? NULL : (void *)&waiter_ret);
341
342	if (third_party_owner)
343	pthread_join(blocker, NULL);
344	pthread_join(waker, NULL);
345
346	out:
347	if (!ret) {
348	if (*waiter_ret)
349	ret = *waiter_ret;
350	else if (waker_arg.ret < 0)
351	ret = waker_arg.ret;
352	else if (blocker_arg.ret)
353	ret = blocker_arg.ret;
354	}
355
356	return ret;
357	}
358
359	int main(int argc, char *argv[])
360	{
361	int c, ret;
362
363	while ((c = getopt(argc, argv, "bchlot:v:")) != -1) {
364	switch (c) {
365	case 'b':
366	broadcast = 1;
367	break;
368	case 'c':
369	log_color(1);
370	break;
371	case 'h':
372	usage(basename(argv[0]));
373	exit(0);
374	case 'l':
375	locked = 1;
376	break;
377	case 'o':
378	owner = 1;
379	locked = 0;
380	break;
381	case 't':
382	timeout_ns = atoi(optarg);
383	break;
384	case 'v':
385	log_verbosity(atoi(optarg));
386	break;
387	default:
388	usage(basename(argv[0]));
389	exit(1);
390	}
391	}
392
b274e75c	393	ksft_print_header();
5821ba96	394	ksft_set_plan(1);
b274e75c SK	395	ksft_print_msg("%s: Test requeue functionality\n", basename(argv[0]));
	396	ksft_print_msg(
	397	"\tArguments: broadcast=%d locked=%d owner=%d timeout=%ldns\n",
	398	broadcast, locked, owner, timeout_ns);
2aa8470f DH	399
	400	/*
	401	* FIXME: unit_test is obsolete now that we parse options and the
	402	* various style of runs are done by run.sh - simplify the code and move
	403	* unit_test into main()
	404	*/
	405	ret = unit_test(broadcast, locked, owner, timeout_ns);
	406
1f666e52	407	print_result(TEST_NAME, ret);
2aa8470f DH	408	return ret;
2aa8470f DH	409	}