110 lines
1.9 KiB
C
110 lines
1.9 KiB
C
/* SPDX-License-Identifier: MIT */
|
|
/*
|
|
* Description: test io_uring poll handling
|
|
*
|
|
*/
|
|
#include <errno.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <signal.h>
|
|
#include <sys/poll.h>
|
|
#include <sys/wait.h>
|
|
|
|
#include "liburing.h"
|
|
|
|
static void sig_alrm(int sig)
|
|
{
|
|
fprintf(stderr, "Timed out!\n");
|
|
exit(1);
|
|
}
|
|
|
|
int main(int argc, char *argv[])
|
|
{
|
|
struct io_uring_cqe *cqe;
|
|
struct io_uring_sqe *sqe;
|
|
struct io_uring ring;
|
|
int pipe1[2];
|
|
pid_t p;
|
|
int ret;
|
|
|
|
if (argc > 1)
|
|
return 0;
|
|
|
|
if (pipe(pipe1) != 0) {
|
|
perror("pipe");
|
|
return 1;
|
|
}
|
|
|
|
p = fork();
|
|
switch (p) {
|
|
case -1:
|
|
perror("fork");
|
|
exit(2);
|
|
case 0: {
|
|
struct sigaction act;
|
|
|
|
ret = io_uring_queue_init(1, &ring, 0);
|
|
if (ret) {
|
|
fprintf(stderr, "child: ring setup failed: %d\n", ret);
|
|
return 1;
|
|
}
|
|
|
|
memset(&act, 0, sizeof(act));
|
|
act.sa_handler = sig_alrm;
|
|
act.sa_flags = SA_RESTART;
|
|
sigaction(SIGALRM, &act, NULL);
|
|
alarm(1);
|
|
|
|
sqe = io_uring_get_sqe(&ring);
|
|
if (!sqe) {
|
|
fprintf(stderr, "get sqe failed\n");
|
|
return 1;
|
|
}
|
|
|
|
io_uring_prep_poll_add(sqe, pipe1[0], POLLIN);
|
|
io_uring_sqe_set_data(sqe, sqe);
|
|
|
|
ret = io_uring_submit(&ring);
|
|
if (ret <= 0) {
|
|
fprintf(stderr, "child: sqe submit failed: %d\n", ret);
|
|
return 1;
|
|
}
|
|
|
|
do {
|
|
ret = io_uring_wait_cqe(&ring, &cqe);
|
|
if (ret < 0) {
|
|
fprintf(stderr, "child: wait completion %d\n", ret);
|
|
break;
|
|
}
|
|
io_uring_cqe_seen(&ring, cqe);
|
|
} while (ret != 0);
|
|
|
|
if (ret < 0)
|
|
return 1;
|
|
if (cqe->user_data != (unsigned long) sqe) {
|
|
fprintf(stderr, "child: cqe doesn't match sqe\n");
|
|
return 1;
|
|
}
|
|
if ((cqe->res & POLLIN) != POLLIN) {
|
|
fprintf(stderr, "child: bad return value %ld\n",
|
|
(long) cqe->res);
|
|
return 1;
|
|
}
|
|
exit(0);
|
|
}
|
|
default:
|
|
do {
|
|
errno = 0;
|
|
ret = write(pipe1[1], "foo", 3);
|
|
} while (ret == -1 && errno == EINTR);
|
|
|
|
if (ret != 3) {
|
|
fprintf(stderr, "parent: bad write return %d\n", ret);
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
}
|