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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: tests for getevents timeout
*
*/
#include <stdio.h>
#include <sys/time.h>
#include <unistd.h>
#include <pthread.h>
#include "liburing.h"
#include "helpers.h"
#define TIMEOUT_MSEC 200
#define TIMEOUT_SEC 10
static int thread_ret0, thread_ret1;
static int cnt = 0;
static pthread_mutex_t mutex;
static void msec_to_ts(struct __kernel_timespec *ts, unsigned int msec)
{
ts->tv_sec = msec / 1000;
ts->tv_nsec = (msec % 1000) * 1000000;
}
static int test_return_before_timeout(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
int ret;
bool retried = false;
struct __kernel_timespec ts;
msec_to_ts(&ts, TIMEOUT_MSEC);
sqe = io_uring_get_sqe(ring);
io_uring_prep_nop(sqe);
ret = io_uring_submit(ring);
if (ret <= 0) {
fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
return 1;
}
again:
ret = io_uring_wait_cqe_timeout(ring, &cqe, &ts);
if (ret == -ETIME && (ring->flags & IORING_SETUP_SQPOLL) && !retried) {
/*
* there is a small chance SQPOLL hasn't been waked up yet,
* give it one more try.
*/
printf("warning: funky SQPOLL timing\n");
sleep(1);
retried = true;
goto again;
} else if (ret < 0) {
fprintf(stderr, "%s: timeout error: %d\n", __FUNCTION__, ret);
return 1;
}
io_uring_cqe_seen(ring, cqe);
return 0;
}
static int test_return_after_timeout(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
int ret;
struct __kernel_timespec ts;
struct timeval tv;
unsigned long long exp;
msec_to_ts(&ts, TIMEOUT_MSEC);
gettimeofday(&tv, NULL);
ret = io_uring_wait_cqe_timeout(ring, &cqe, &ts);
exp = mtime_since_now(&tv);
if (ret != -ETIME) {
fprintf(stderr, "%s: timeout error: %d\n", __FUNCTION__, ret);
return 1;
}
if (exp < TIMEOUT_MSEC / 2 || exp > (TIMEOUT_MSEC * 3) / 2) {
fprintf(stderr, "%s: Timeout seems wonky (got %llu)\n", __FUNCTION__, exp);
return 1;
}
return 0;
}
static int __reap_thread_fn(void *data)
{
struct io_uring *ring = (struct io_uring *)data;
struct io_uring_cqe *cqe;
struct __kernel_timespec ts;
msec_to_ts(&ts, TIMEOUT_SEC);
pthread_mutex_lock(&mutex);
cnt++;
pthread_mutex_unlock(&mutex);
return io_uring_wait_cqe_timeout(ring, &cqe, &ts);
}
static void *reap_thread_fn0(void *data)
{
thread_ret0 = __reap_thread_fn(data);
return NULL;
}
static void *reap_thread_fn1(void *data)
{
thread_ret1 = __reap_thread_fn(data);
return NULL;
}
/*
* This is to test issuing a sqe in main thread and reaping it in two child-thread
* at the same time. To see if timeout feature works or not.
*/
static int test_multi_threads_timeout(void)
{
struct io_uring ring;
int ret;
bool both_wait = false;
pthread_t reap_thread0, reap_thread1;
struct io_uring_sqe *sqe;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "%s: ring setup failed: %d\n", __FUNCTION__, ret);
return 1;
}
pthread_create(&reap_thread0, NULL, reap_thread_fn0, &ring);
pthread_create(&reap_thread1, NULL, reap_thread_fn1, &ring);
/*
* make two threads both enter io_uring_wait_cqe_timeout() before issuing the sqe
* as possible as we can. So that there are two threads in the ctx->wait queue.
* In this way, we can test if a cqe wakes up two threads at the same time.
*/
while(!both_wait) {
pthread_mutex_lock(&mutex);
if (cnt == 2)
both_wait = true;
pthread_mutex_unlock(&mutex);
sleep(1);
}
sqe = io_uring_get_sqe(&ring);
if (!sqe) {
fprintf(stderr, "%s: get sqe failed\n", __FUNCTION__);
goto err;
}
io_uring_prep_nop(sqe);
ret = io_uring_submit(&ring);
if (ret <= 0) {
fprintf(stderr, "%s: sqe submit failed: %d\n", __FUNCTION__, ret);
goto err;
}
pthread_join(reap_thread0, NULL);
pthread_join(reap_thread1, NULL);
if ((thread_ret0 && thread_ret0 != -ETIME) || (thread_ret1 && thread_ret1 != -ETIME)) {
fprintf(stderr, "%s: thread wait cqe timeout failed: %d %d\n",
__FUNCTION__, thread_ret0, thread_ret1);
goto err;
}
return 0;
err:
return 1;
}
int main(int argc, char *argv[])
{
struct io_uring ring_normal, ring_sq;
int ret;
if (argc > 1)
return 0;
ret = io_uring_queue_init(8, &ring_normal, 0);
if (ret) {
fprintf(stderr, "ring_normal setup failed: %d\n", ret);
return 1;
}
if (!(ring_normal.features & IORING_FEAT_EXT_ARG)) {
fprintf(stderr, "feature IORING_FEAT_EXT_ARG not supported, skipping.\n");
return 0;
}
ret = test_return_before_timeout(&ring_normal);
if (ret) {
fprintf(stderr, "ring_normal: test_return_before_timeout failed\n");
return ret;
}
ret = test_return_after_timeout(&ring_normal);
if (ret) {
fprintf(stderr, "ring_normal: test_return_after_timeout failed\n");
return ret;
}
ret = io_uring_queue_init(8, &ring_sq, IORING_SETUP_SQPOLL);
if (ret) {
fprintf(stderr, "ring_sq setup failed: %d\n", ret);
return 1;
}
ret = test_return_before_timeout(&ring_sq);
if (ret) {
fprintf(stderr, "ring_sq: test_return_before_timeout failed\n");
return ret;
}
ret = test_return_after_timeout(&ring_sq);
if (ret) {
fprintf(stderr, "ring_sq: test_return_after_timeout failed\n");
return ret;
}
ret = test_multi_threads_timeout();
if (ret) {
fprintf(stderr, "test_multi_threads_timeout failed\n");
return ret;
}
return 0;
}
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