1 /* SPDX-License-Identifier: MIT */
2 /*
3 * Description: test CQ ring sizing
4 */
5 #include <errno.h>
6 #include <stdio.h>
7 #include <unistd.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <fcntl.h>
11
12 #include "liburing.h"
13
main(int argc,char * argv[])14 int main(int argc, char *argv[])
15 {
16 struct io_uring_params p;
17 struct io_uring ring;
18 int ret;
19
20 if (argc > 1)
21 return 0;
22
23 memset(&p, 0, sizeof(p));
24 p.flags = IORING_SETUP_CQSIZE;
25 p.cq_entries = 64;
26
27 ret = io_uring_queue_init_params(4, &ring, &p);
28 if (ret) {
29 if (ret == -EINVAL) {
30 printf("Skipped, not supported on this kernel\n");
31 goto done;
32 }
33 printf("ring setup failed\n");
34 return 1;
35 }
36
37 if (p.cq_entries < 64) {
38 printf("cq entries invalid (%d)\n", p.cq_entries);
39 goto err;
40 }
41 io_uring_queue_exit(&ring);
42
43 memset(&p, 0, sizeof(p));
44 p.flags = IORING_SETUP_CQSIZE;
45 p.cq_entries = 0;
46
47 ret = io_uring_queue_init_params(4, &ring, &p);
48 if (ret >= 0 || errno != EINVAL) {
49 printf("zero sized cq ring succeeded\n");
50 goto err;
51 }
52
53 done:
54 return 0;
55 err:
56 io_uring_queue_exit(&ring);
57 return 1;
58 }
59