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/*
* Description: test if io_uring SQ poll kthread is stopped when the userspace
* process ended with or without closing the io_uring fd
*
*/
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <unistd.h>
#include <pthread.h>
#include <stdbool.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <sys/epoll.h>
#include "liburing.h"
#define SQ_THREAD_IDLE 2000
#define BUF_SIZE 128
#define KTHREAD_NAME "io_uring-sq"
enum {
TEST_OK = 0,
TEST_SKIPPED = 1,
TEST_FAILED = 2,
};
static int do_test_sq_poll_kthread_stopped(bool do_exit)
{
int ret = 0, pipe1[2];
struct io_uring_params param;
struct io_uring ring;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
uint8_t buf[BUF_SIZE];
struct iovec iov;
if (geteuid()) {
fprintf(stderr, "sqpoll requires root!\n");
return TEST_SKIPPED;
}
if (pipe(pipe1) != 0) {
perror("pipe");
return TEST_FAILED;
}
memset(¶m, 0, sizeof(param));
param.flags |= IORING_SETUP_SQPOLL;
param.sq_thread_idle = SQ_THREAD_IDLE;
ret = io_uring_queue_init_params(16, &ring, ¶m);
if (ret) {
fprintf(stderr, "ring setup failed\n");
ret = TEST_FAILED;
goto err_pipe;
}
ret = io_uring_register_files(&ring, &pipe1[1], 1);
if (ret) {
fprintf(stderr, "file reg failed: %d\n", ret);
ret = TEST_FAILED;
goto err_uring;
}
iov.iov_base = buf;
iov.iov_len = BUF_SIZE;
sqe = io_uring_get_sqe(&ring);
if (!sqe) {
fprintf(stderr, "io_uring_get_sqe failed\n");
ret = TEST_FAILED;
goto err_uring;
}
io_uring_prep_writev(sqe, 0, &iov, 1, 0);
sqe->flags |= IOSQE_FIXED_FILE;
ret = io_uring_submit(&ring);
if (ret < 0) {
fprintf(stderr, "io_uring_submit failed - ret: %d\n",
ret);
ret = TEST_FAILED;
goto err_uring;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "io_uring_wait_cqe - ret: %d\n",
ret);
ret = TEST_FAILED;
goto err_uring;
}
if (cqe->res != BUF_SIZE) {
fprintf(stderr, "unexpected cqe->res %d [expected %d]\n",
cqe->res, BUF_SIZE);
ret = TEST_FAILED;
goto err_uring;
}
io_uring_cqe_seen(&ring, cqe);
ret = TEST_OK;
err_uring:
if (do_exit)
io_uring_queue_exit(&ring);
err_pipe:
close(pipe1[0]);
close(pipe1[1]);
return ret;
}
int test_sq_poll_kthread_stopped(bool do_exit)
{
pid_t pid;
int status = 0;
pid = fork();
if (pid == 0) {
int ret = do_test_sq_poll_kthread_stopped(do_exit);
exit(ret);
}
pid = wait(&status);
if (status != 0)
return WEXITSTATUS(status);
sleep(1);
if (system("ps --ppid 2 | grep " KTHREAD_NAME) == 0) {
fprintf(stderr, "%s kthread still running!\n", KTHREAD_NAME);
return TEST_FAILED;
}
return 0;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return 0;
ret = test_sq_poll_kthread_stopped(true);
if (ret == TEST_SKIPPED) {
printf("test_sq_poll_kthread_stopped_exit: skipped\n");
} else if (ret == TEST_FAILED) {
fprintf(stderr, "test_sq_poll_kthread_stopped_exit failed\n");
return ret;
}
ret = test_sq_poll_kthread_stopped(false);
if (ret == TEST_SKIPPED) {
printf("test_sq_poll_kthread_stopped_noexit: skipped\n");
} else if (ret == TEST_FAILED) {
fprintf(stderr, "test_sq_poll_kthread_stopped_noexit failed\n");
return ret;
}
return 0;
}
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