1 /* SPDX-License-Identifier: MIT */
2 /*
3 * Description: Test poll against ring itself. A buggy kernel will end up
4 * having io_wq_* workers pending, as the circular reference
5 * will prevent full exit.
6 *
7 */
8 #include <errno.h>
9 #include <stdio.h>
10 #include <unistd.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <poll.h>
14
15 #include "liburing.h"
16
main(int argc,char * argv[])17 int main(int argc, char *argv[])
18 {
19 struct io_uring_sqe *sqe;
20 struct io_uring ring;
21 int ret;
22
23 if (argc > 1)
24 return 0;
25
26 ret = io_uring_queue_init(1, &ring, 0);
27 if (ret) {
28 fprintf(stderr, "child: ring setup failed: %d\n", ret);
29 return 1;
30 }
31
32 sqe = io_uring_get_sqe(&ring);
33 if (!sqe) {
34 fprintf(stderr, "get sqe failed\n");
35 return 1;
36 }
37
38 io_uring_prep_poll_add(sqe, ring.ring_fd, POLLIN);
39 io_uring_sqe_set_data(sqe, sqe);
40
41 ret = io_uring_submit(&ring);
42 if (ret <= 0) {
43 fprintf(stderr, "child: sqe submit failed: %d\n", ret);
44 return 1;
45 }
46
47 return 0;
48 }
49