1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
|
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: Check that trying to read two eventfd events will still
* return one when generated. There was a kernel commit that
* all of a sudden pretended that anonymous inodes were
* regular files, which broke the io_uring short read/write
* handling logic. See:
*
* https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cfd86ef7e8e7
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <poll.h>
#include <sys/eventfd.h>
#include "liburing.h"
#include "helpers.h"
static void sig_alrm(int sig)
{
fprintf(stderr, "Test failed due to timeout\n");
exit(T_EXIT_FAIL);
}
int main(int argc, char *argv[])
{
struct io_uring_params p = {};
struct sigaction act = { };
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct io_uring ring;
uint64_t ptr[2], tmp;
int ret, evfd;
if (argc > 1)
return T_EXIT_SKIP;
ret = io_uring_queue_init_params(8, &ring, &p);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return T_EXIT_FAIL;
}
evfd = eventfd(0, EFD_CLOEXEC | EFD_NONBLOCK);
if (evfd < 0) {
perror("eventfd");
return T_EXIT_FAIL;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_read(sqe, evfd, ptr, sizeof(ptr), 0);
sqe->user_data = 1;
io_uring_submit(&ring);
act.sa_handler = sig_alrm;
sigaction(SIGALRM, &act, NULL);
alarm(1);
usleep(10000);
tmp = 1;
ret = write(evfd, &tmp, sizeof(tmp));
if (ret < 0) {
perror("write");
return T_EXIT_FAIL;
} else if (ret != sizeof(tmp)) {
fprintf(stderr, "Short eventfd write\n");
return T_EXIT_FAIL;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait: %d\n", ret);
return T_EXIT_FAIL;
}
io_uring_cqe_seen(&ring, cqe);
close(evfd);
return 0;
}
|
