test/accept.c - platform/external/liburing - Git at Google

 /* SPDX-License-Identifier: MIT */
 /*
  * Check that IORING_OP_ACCEPT works, and send some data across to verify we
  * didn't get a junk fd.
  */
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdint.h>
 #include <assert.h>

 #include <errno.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <sys/socket.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <sys/un.h>
 #include <netinet/tcp.h>
 #include <netinet/in.h>

 #include "helpers.h"
 #include "liburing.h"

 static int no_accept;

 struct data {
 	char buf[128];
 	struct iovec iov;
 };

 static void queue_send(struct io_uring *ring, int fd)
 {
 	struct io_uring_sqe *sqe;
 	struct data *d;

 	d = t_malloc(sizeof(*d));
 	d->iov.iov_base = d->buf;
 	d->iov.iov_len = sizeof(d->buf);

 	sqe = io_uring_get_sqe(ring);
 	io_uring_prep_writev(sqe, fd, &d->iov, 1, 0);
 }

 static void queue_recv(struct io_uring *ring, int fd)
 {
 	struct io_uring_sqe *sqe;
 	struct data *d;

 	d = t_malloc(sizeof(*d));
 	d->iov.iov_base = d->buf;
 	d->iov.iov_len = sizeof(d->buf);

 	sqe = io_uring_get_sqe(ring);
 	io_uring_prep_readv(sqe, fd, &d->iov, 1, 0);
 }

 static int accept_conn(struct io_uring *ring, int fd)
 {
 	struct io_uring_sqe *sqe;
 	struct io_uring_cqe *cqe;
 	int ret;

 	sqe = io_uring_get_sqe(ring);
 	io_uring_prep_accept(sqe, fd, NULL, NULL, 0);

 	ret = io_uring_submit(ring);
 	assert(ret != -1);

 	ret = io_uring_wait_cqe(ring, &cqe);
 	assert(!ret);
 	ret = cqe->res;
 	io_uring_cqe_seen(ring, cqe);
 	return ret;
 }

 static int start_accept_listen(struct sockaddr_in *addr, int port_off)
 {
 	int fd, ret;

 	fd = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);

 	int32_t val = 1;
 	ret = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val));
 	assert(ret != -1);
 	ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
 	assert(ret != -1);

 	struct sockaddr_in laddr;

 	if (!addr)
 		addr = &laddr;

 	addr->sin_family = AF_INET;
 	addr->sin_port = 0x1235 + port_off;
 	addr->sin_addr.s_addr = 0x0100007fU;

 	ret = bind(fd, (struct sockaddr*)addr, sizeof(*addr));
 	assert(ret != -1);
 	ret = listen(fd, 128);
 	assert(ret != -1);

 	return fd;
 }

 static int test(struct io_uring *ring, int accept_should_error)
 {
 	struct io_uring_cqe *cqe;
 	struct sockaddr_in addr;
 	uint32_t head;
 	uint32_t count = 0;
 	int done = 0;
 	int p_fd[2];
         int ret;

 	int32_t val, recv_s0 = start_accept_listen(&addr, 0);

 	p_fd[1] = socket(AF_INET, SOCK_STREAM | SOCK_CLOEXEC, IPPROTO_TCP);

 	val = 1;
 	ret = setsockopt(p_fd[1], IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
 	assert(ret != -1);

 	int32_t flags = fcntl(p_fd[1], F_GETFL, 0);
 	assert(flags != -1);

 	flags |= O_NONBLOCK;
 	ret = fcntl(p_fd[1], F_SETFL, flags);
 	assert(ret != -1);

 	ret = connect(p_fd[1], (struct sockaddr*)&addr, sizeof(addr));
 	assert(ret == -1);

 	flags = fcntl(p_fd[1], F_GETFL, 0);
 	assert(flags != -1);

 	flags &= ~O_NONBLOCK;
 	ret = fcntl(p_fd[1], F_SETFL, flags);
 	assert(ret != -1);

 	p_fd[0] = accept_conn(ring, recv_s0);
 	if (p_fd[0] == -EINVAL) {
 		if (accept_should_error)
 			goto out;
 		fprintf(stdout, "Accept not supported, skipping\n");
 		no_accept = 1;
 		goto out;
 	} else if (p_fd[0] < 0) {
 		if (accept_should_error &&
 		    (p_fd[0] == -EBADF || p_fd[0] == -EINVAL))
 			goto out;
 		fprintf(stderr, "Accept got %d\n", p_fd[0]);
 		goto err;
 	}

 	queue_send(ring, p_fd[1]);
 	queue_recv(ring, p_fd[0]);

 	ret = io_uring_submit_and_wait(ring, 2);
 	assert(ret != -1);

 	while (count < 2) {
 		io_uring_for_each_cqe(ring, head, cqe) {
 			if (cqe->res < 0) {
 				fprintf(stderr, "Got cqe res %d\n", cqe->res);
 				done = 1;
 				break;
 			}
 			assert(cqe->res == 128);
 			count++;
 		}

 		assert(count <= 2);
 		io_uring_cq_advance(ring, count);
 		if (done)
 			goto err;
 	}

 out:
 	close(p_fd[0]);
 	close(p_fd[1]);
 	close(recv_s0);
 	return 0;
 err:
 	close(p_fd[0]);
 	close(p_fd[1]);
 	close(recv_s0);
 	return 1;
 }

 static void sig_alrm(int sig)
 {
 	exit(0);
 }

 static int test_accept_pending_on_exit(void)
 {
 	struct io_uring m_io_uring;
 	struct io_uring_cqe *cqe;
 	struct io_uring_sqe *sqe;
 	int fd, ret;

 	ret = io_uring_queue_init(32, &m_io_uring, 0);
 	assert(ret >= 0);

 	fd = start_accept_listen(NULL, 0);

 	sqe = io_uring_get_sqe(&m_io_uring);
 	io_uring_prep_accept(sqe, fd, NULL, NULL, 0);
 	ret = io_uring_submit(&m_io_uring);
 	assert(ret != -1);

 	signal(SIGALRM, sig_alrm);
 	alarm(1);
 	ret = io_uring_wait_cqe(&m_io_uring, &cqe);
 	assert(!ret);
 	io_uring_cqe_seen(&m_io_uring, cqe);

 	io_uring_queue_exit(&m_io_uring);
 	return 0;
 }

 /*
  * Test issue many accepts and see if we handle cancellation on exit
  */
 static int test_accept_many(unsigned nr, unsigned usecs)
 {
 	struct io_uring m_io_uring;
 	struct io_uring_cqe *cqe;
 	struct io_uring_sqe *sqe;
 	unsigned long cur_lim;
 	struct rlimit rlim;
 	int *fds, i, ret;

 	if (getrlimit(RLIMIT_NPROC, &rlim) < 0) {
 		perror("getrlimit");
 		return 1;
 	}

 	cur_lim = rlim.rlim_cur;
 	rlim.rlim_cur = nr / 4;

 	if (setrlimit(RLIMIT_NPROC, &rlim) < 0) {
 		perror("setrlimit");
 		return 1;
 	}

 	ret = io_uring_queue_init(2 * nr, &m_io_uring, 0);
 	assert(ret >= 0);

 	fds = t_calloc(nr, sizeof(int));

 	for (i = 0; i < nr; i++)
 		fds[i] = start_accept_listen(NULL, i);

 	for (i = 0; i < nr; i++) {
 		sqe = io_uring_get_sqe(&m_io_uring);
 		io_uring_prep_accept(sqe, fds[i], NULL, NULL, 0);
 		sqe->user_data = 1 + i;
 		ret = io_uring_submit(&m_io_uring);
 		assert(ret == 1);
 	}

 	if (usecs)
 		usleep(usecs);

 	for (i = 0; i < nr; i++) {
 		if (io_uring_peek_cqe(&m_io_uring, &cqe))
 			break;
 		if (cqe->res != -ECANCELED) {
 			fprintf(stderr, "Expected cqe to be cancelled\n");
 			goto err;
 		}
 		io_uring_cqe_seen(&m_io_uring, cqe);
 	}
 out:
 	rlim.rlim_cur = cur_lim;
 	if (setrlimit(RLIMIT_NPROC, &rlim) < 0) {
 		perror("setrlimit");
 		return 1;
 	}

 	free(fds);
 	io_uring_queue_exit(&m_io_uring);
 	return 0;
 err:
 	ret = 1;
 	goto out;
 }

 static int test_accept_cancel(unsigned usecs)
 {
 	struct io_uring m_io_uring;
 	struct io_uring_cqe *cqe;
 	struct io_uring_sqe *sqe;
 	int fd, i, ret;

 	ret = io_uring_queue_init(32, &m_io_uring, 0);
 	assert(ret >= 0);

 	fd = start_accept_listen(NULL, 0);

 	sqe = io_uring_get_sqe(&m_io_uring);
 	io_uring_prep_accept(sqe, fd, NULL, NULL, 0);
 	sqe->user_data = 1;
         ret = io_uring_submit(&m_io_uring);
 	assert(ret == 1);

 	if (usecs)
 		usleep(usecs);

 	sqe = io_uring_get_sqe(&m_io_uring);
 	io_uring_prep_cancel(sqe, (void *) 1, 0);
 	sqe->user_data = 2;
 	ret = io_uring_submit(&m_io_uring);
 	assert(ret == 1);

 	for (i = 0; i < 2; i++) {
 		ret = io_uring_wait_cqe(&m_io_uring, &cqe);
 		assert(!ret);
 		/*
 		 * Two cases here:
 		 *
 		 * 1) We cancel the accept4() before it got started, we should
 		 *    get '0' for the cancel request and '-ECANCELED' for the
 		 *    accept request.
 		 * 2) We cancel the accept4() after it's already running, we
 		 *    should get '-EALREADY' for the cancel request and
 		 *    '-EINTR' for the accept request.
 		 */
 		if (cqe->user_data == 1) {
 			if (cqe->res != -EINTR && cqe->res != -ECANCELED) {
 				fprintf(stderr, "Cancelled accept got %d\n", cqe->res);
 				goto err;
 			}
 		} else if (cqe->user_data == 2) {
 			if (cqe->res != -EALREADY && cqe->res != 0) {
 				fprintf(stderr, "Cancel got %d\n", cqe->res);
 				goto err;
 			}
 		}
 		io_uring_cqe_seen(&m_io_uring, cqe);
 	}

 	io_uring_queue_exit(&m_io_uring);
 	return 0;
 err:
 	io_uring_queue_exit(&m_io_uring);
 	return 1;
 }

 static int test_accept(void)
 {
 	struct io_uring m_io_uring;
 	int ret;

 	ret = io_uring_queue_init(32, &m_io_uring, 0);
 	assert(ret >= 0);
 	ret = test(&m_io_uring, 0);
 	io_uring_queue_exit(&m_io_uring);
 	return ret;
 }

 static int test_accept_sqpoll(void)
 {
 	struct io_uring m_io_uring;
 	struct io_uring_params p = { };
 	int ret, should_fail;

 	p.flags = IORING_SETUP_SQPOLL;
 	ret = t_create_ring_params(32, &m_io_uring, &p);
 	if (ret == T_SETUP_SKIP)
 		return 0;
 	else if (ret < 0)
 		return ret;

 	should_fail = 1;
 	if (p.features & IORING_FEAT_SQPOLL_NONFIXED)
 		should_fail = 0;

 	ret = test(&m_io_uring, should_fail);
 	io_uring_queue_exit(&m_io_uring);
 	return ret;
 }

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

 	if (argc > 1)
 		return 0;

 	ret = test_accept();
 	if (ret) {
 		fprintf(stderr, "test_accept failed\n");
 		return ret;
 	}
 	if (no_accept)
 		return 0;

 	ret = test_accept_sqpoll();
 	if (ret) {
 		fprintf(stderr, "test_accept_sqpoll failed\n");
 		return ret;
 	}

 	ret = test_accept_cancel(0);
 	if (ret) {
 		fprintf(stderr, "test_accept_cancel nodelay failed\n");
 		return ret;
 	}

 	ret = test_accept_cancel(10000);
 	if (ret) {
 		fprintf(stderr, "test_accept_cancel delay failed\n");
 		return ret;
 	}

 	ret = test_accept_many(128, 0);
 	if (ret) {
 		fprintf(stderr, "test_accept_many failed\n");
 		return ret;
 	}

 	ret = test_accept_many(128, 100000);
 	if (ret) {
 		fprintf(stderr, "test_accept_many failed\n");
 		return ret;
 	}

 	ret = test_accept_pending_on_exit();
 	if (ret) {
 		fprintf(stderr, "test_accept_pending_on_exit failed\n");
 		return ret;
 	}

 	return 0;
 }
	/* SPDX-License-Identifier: MIT */
	/*
	* Check that IORING_OP_ACCEPT works, and send some data across to verify we
	* didn't get a junk fd.
	*/
	#include <stdio.h>
	#include <stdlib.h>
	#include <stdint.h>
	#include <assert.h>

	#include <errno.h>
	#include <fcntl.h>
	#include <unistd.h>
	#include <sys/socket.h>
	#include <sys/time.h>
	#include <sys/resource.h>
	#include <sys/un.h>
	#include <netinet/tcp.h>
	#include <netinet/in.h>

	#include "helpers.h"
	#include "liburing.h"

	static int no_accept;

	struct data {
	char buf[128];
	struct iovec iov;
	};

	static void queue_send(struct io_uring *ring, int fd)
	{
	struct io_uring_sqe *sqe;
	struct data *d;

	d = t_malloc(sizeof(*d));
	d->iov.iov_base = d->buf;
	d->iov.iov_len = sizeof(d->buf);

	sqe = io_uring_get_sqe(ring);
	io_uring_prep_writev(sqe, fd, &d->iov, 1, 0);
	}

	static void queue_recv(struct io_uring *ring, int fd)
	{
	struct io_uring_sqe *sqe;
	struct data *d;

	d = t_malloc(sizeof(*d));
	d->iov.iov_base = d->buf;
	d->iov.iov_len = sizeof(d->buf);

	sqe = io_uring_get_sqe(ring);
	io_uring_prep_readv(sqe, fd, &d->iov, 1, 0);
	}

	static int accept_conn(struct io_uring *ring, int fd)
	{
	struct io_uring_sqe *sqe;
	struct io_uring_cqe *cqe;
	int ret;

	sqe = io_uring_get_sqe(ring);
	io_uring_prep_accept(sqe, fd, NULL, NULL, 0);

	ret = io_uring_submit(ring);
	assert(ret != -1);

	ret = io_uring_wait_cqe(ring, &cqe);
	assert(!ret);
	ret = cqe->res;
	io_uring_cqe_seen(ring, cqe);
	return ret;
	}

	static int start_accept_listen(struct sockaddr_in *addr, int port_off)
	{
	int fd, ret;

	fd = socket(AF_INET, SOCK_STREAM \| SOCK_CLOEXEC, IPPROTO_TCP);

	int32_t val = 1;
	ret = setsockopt(fd, SOL_SOCKET, SO_REUSEPORT, &val, sizeof(val));
	assert(ret != -1);
	ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
	assert(ret != -1);

	struct sockaddr_in laddr;

	if (!addr)
	addr = &laddr;

	addr->sin_family = AF_INET;
	addr->sin_port = 0x1235 + port_off;
	addr->sin_addr.s_addr = 0x0100007fU;

	ret = bind(fd, (struct sockaddr)addr, sizeof(addr));
	assert(ret != -1);
	ret = listen(fd, 128);
	assert(ret != -1);

	return fd;
	}

	static int test(struct io_uring *ring, int accept_should_error)
	{
	struct io_uring_cqe *cqe;
	struct sockaddr_in addr;
	uint32_t head;
	uint32_t count = 0;
	int done = 0;
	int p_fd[2];
	int ret;

	int32_t val, recv_s0 = start_accept_listen(&addr, 0);

	p_fd[1] = socket(AF_INET, SOCK_STREAM \| SOCK_CLOEXEC, IPPROTO_TCP);

	val = 1;
	ret = setsockopt(p_fd[1], IPPROTO_TCP, TCP_NODELAY, &val, sizeof(val));
	assert(ret != -1);

	int32_t flags = fcntl(p_fd[1], F_GETFL, 0);
	assert(flags != -1);

	flags \|= O_NONBLOCK;
	ret = fcntl(p_fd[1], F_SETFL, flags);
	assert(ret != -1);

	ret = connect(p_fd[1], (struct sockaddr*)&addr, sizeof(addr));
	assert(ret == -1);

	flags = fcntl(p_fd[1], F_GETFL, 0);
	assert(flags != -1);

	flags &= ~O_NONBLOCK;
	ret = fcntl(p_fd[1], F_SETFL, flags);
	assert(ret != -1);

	p_fd[0] = accept_conn(ring, recv_s0);
	if (p_fd[0] == -EINVAL) {
	if (accept_should_error)
	goto out;
	fprintf(stdout, "Accept not supported, skipping\n");
	no_accept = 1;
	goto out;
	} else if (p_fd[0] < 0) {
	if (accept_should_error &&
	(p_fd[0] == -EBADF \|\| p_fd[0] == -EINVAL))
	goto out;
	fprintf(stderr, "Accept got %d\n", p_fd[0]);
	goto err;
	}

	queue_send(ring, p_fd[1]);
	queue_recv(ring, p_fd[0]);

	ret = io_uring_submit_and_wait(ring, 2);
	assert(ret != -1);

	while (count < 2) {
	io_uring_for_each_cqe(ring, head, cqe) {
	if (cqe->res < 0) {
	fprintf(stderr, "Got cqe res %d\n", cqe->res);
	done = 1;
	break;
	}
	assert(cqe->res == 128);
	count++;
	}

	assert(count <= 2);
	io_uring_cq_advance(ring, count);
	if (done)
	goto err;
	}

	out:
	close(p_fd[0]);
	close(p_fd[1]);
	close(recv_s0);
	return 0;
	err:
	close(p_fd[0]);
	close(p_fd[1]);
	close(recv_s0);
	return 1;
	}

	static void sig_alrm(int sig)
	{
	exit(0);
	}

	static int test_accept_pending_on_exit(void)
	{
	struct io_uring m_io_uring;
	struct io_uring_cqe *cqe;
	struct io_uring_sqe *sqe;
	int fd, ret;

	ret = io_uring_queue_init(32, &m_io_uring, 0);
	assert(ret >= 0);

	fd = start_accept_listen(NULL, 0);

	sqe = io_uring_get_sqe(&m_io_uring);
	io_uring_prep_accept(sqe, fd, NULL, NULL, 0);
	ret = io_uring_submit(&m_io_uring);
	assert(ret != -1);

	signal(SIGALRM, sig_alrm);
	alarm(1);
	ret = io_uring_wait_cqe(&m_io_uring, &cqe);
	assert(!ret);
	io_uring_cqe_seen(&m_io_uring, cqe);

	io_uring_queue_exit(&m_io_uring);
	return 0;
	}

	/*
	* Test issue many accepts and see if we handle cancellation on exit
	*/
	static int test_accept_many(unsigned nr, unsigned usecs)
	{
	struct io_uring m_io_uring;
	struct io_uring_cqe *cqe;
	struct io_uring_sqe *sqe;
	unsigned long cur_lim;
	struct rlimit rlim;
	int *fds, i, ret;

	if (getrlimit(RLIMIT_NPROC, &rlim) < 0) {
	perror("getrlimit");
	return 1;
	}

	cur_lim = rlim.rlim_cur;
	rlim.rlim_cur = nr / 4;

	if (setrlimit(RLIMIT_NPROC, &rlim) < 0) {
	perror("setrlimit");
	return 1;
	}

	ret = io_uring_queue_init(2 * nr, &m_io_uring, 0);
	assert(ret >= 0);

	fds = t_calloc(nr, sizeof(int));

	for (i = 0; i < nr; i++)
	fds[i] = start_accept_listen(NULL, i);

	for (i = 0; i < nr; i++) {
	sqe = io_uring_get_sqe(&m_io_uring);
	io_uring_prep_accept(sqe, fds[i], NULL, NULL, 0);
	sqe->user_data = 1 + i;
	ret = io_uring_submit(&m_io_uring);
	assert(ret == 1);
	}

	if (usecs)
	usleep(usecs);

	for (i = 0; i < nr; i++) {
	if (io_uring_peek_cqe(&m_io_uring, &cqe))
	break;
	if (cqe->res != -ECANCELED) {
	fprintf(stderr, "Expected cqe to be cancelled\n");
	goto err;
	}
	io_uring_cqe_seen(&m_io_uring, cqe);
	}
	out:
	rlim.rlim_cur = cur_lim;
	if (setrlimit(RLIMIT_NPROC, &rlim) < 0) {
	perror("setrlimit");
	return 1;
	}

	free(fds);
	io_uring_queue_exit(&m_io_uring);
	return 0;
	err:
	ret = 1;
	goto out;
	}

	static int test_accept_cancel(unsigned usecs)
	{
	struct io_uring m_io_uring;
	struct io_uring_cqe *cqe;
	struct io_uring_sqe *sqe;
	int fd, i, ret;

	ret = io_uring_queue_init(32, &m_io_uring, 0);
	assert(ret >= 0);

	fd = start_accept_listen(NULL, 0);

	sqe = io_uring_get_sqe(&m_io_uring);
	io_uring_prep_accept(sqe, fd, NULL, NULL, 0);
	sqe->user_data = 1;
	ret = io_uring_submit(&m_io_uring);
	assert(ret == 1);

	if (usecs)
	usleep(usecs);

	sqe = io_uring_get_sqe(&m_io_uring);
	io_uring_prep_cancel(sqe, (void *) 1, 0);
	sqe->user_data = 2;
	ret = io_uring_submit(&m_io_uring);
	assert(ret == 1);

	for (i = 0; i < 2; i++) {
	ret = io_uring_wait_cqe(&m_io_uring, &cqe);
	assert(!ret);
	/*
	* Two cases here:
	*
	* 1) We cancel the accept4() before it got started, we should
	* get '0' for the cancel request and '-ECANCELED' for the
	* accept request.
	* 2) We cancel the accept4() after it's already running, we
	* should get '-EALREADY' for the cancel request and
	* '-EINTR' for the accept request.
	*/
	if (cqe->user_data == 1) {
	if (cqe->res != -EINTR && cqe->res != -ECANCELED) {
	fprintf(stderr, "Cancelled accept got %d\n", cqe->res);
	goto err;
	}
	} else if (cqe->user_data == 2) {
	if (cqe->res != -EALREADY && cqe->res != 0) {
	fprintf(stderr, "Cancel got %d\n", cqe->res);
	goto err;
	}
	}
	io_uring_cqe_seen(&m_io_uring, cqe);
	}

	io_uring_queue_exit(&m_io_uring);
	return 0;
	err:
	io_uring_queue_exit(&m_io_uring);
	return 1;
	}

	static int test_accept(void)
	{
	struct io_uring m_io_uring;
	int ret;

	ret = io_uring_queue_init(32, &m_io_uring, 0);
	assert(ret >= 0);
	ret = test(&m_io_uring, 0);
	io_uring_queue_exit(&m_io_uring);
	return ret;
	}

	static int test_accept_sqpoll(void)
	{
	struct io_uring m_io_uring;
	struct io_uring_params p = { };
	int ret, should_fail;

	p.flags = IORING_SETUP_SQPOLL;
	ret = t_create_ring_params(32, &m_io_uring, &p);
	if (ret == T_SETUP_SKIP)
	return 0;
	else if (ret < 0)
	return ret;

	should_fail = 1;
	if (p.features & IORING_FEAT_SQPOLL_NONFIXED)
	should_fail = 0;

	ret = test(&m_io_uring, should_fail);
	io_uring_queue_exit(&m_io_uring);
	return ret;
	}

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

	if (argc > 1)
	return 0;

	ret = test_accept();
	if (ret) {
	fprintf(stderr, "test_accept failed\n");
	return ret;
	}
	if (no_accept)
	return 0;

	ret = test_accept_sqpoll();
	if (ret) {
	fprintf(stderr, "test_accept_sqpoll failed\n");
	return ret;
	}

	ret = test_accept_cancel(0);
	if (ret) {
	fprintf(stderr, "test_accept_cancel nodelay failed\n");
	return ret;
	}

	ret = test_accept_cancel(10000);
	if (ret) {
	fprintf(stderr, "test_accept_cancel delay failed\n");
	return ret;
	}

	ret = test_accept_many(128, 0);
	if (ret) {
	fprintf(stderr, "test_accept_many failed\n");
	return ret;
	}

	ret = test_accept_many(128, 100000);
	if (ret) {
	fprintf(stderr, "test_accept_many failed\n");
	return ret;
	}

	ret = test_accept_pending_on_exit();
	if (ret) {
	fprintf(stderr, "test_accept_pending_on_exit failed\n");
	return ret;
	}

	return 0;
	}