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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
|
/* SPDX-License-Identifier: MIT */
/*
* Description: test io_uring poll cancel handling
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include <sys/signal.h>
#include "liburing.h"
struct poll_data {
unsigned is_poll;
unsigned is_cancel;
};
static void sig_alrm(int sig)
{
fprintf(stderr, "Timed out!\n");
exit(1);
}
int main(int argc, char *argv[])
{
struct io_uring ring;
int pipe1[2];
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct poll_data *pd, pds[2];
struct sigaction act;
int ret;
if (argc > 1)
return 0;
if (pipe(pipe1) != 0) {
perror("pipe");
return 1;
}
ret = io_uring_queue_init(2, &ring, 0);
if (ret) {
fprintf(stderr, "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);
pds[0].is_poll = 1;
pds[0].is_cancel = 0;
io_uring_sqe_set_data(sqe, &pds[0]);
ret = io_uring_submit(&ring);
if (ret <= 0) {
fprintf(stderr, "sqe submit failed\n");
return 1;
}
sqe = io_uring_get_sqe(&ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
return 1;
}
pds[1].is_poll = 0;
pds[1].is_cancel = 1;
io_uring_prep_poll_remove(sqe, &pds[0]);
io_uring_sqe_set_data(sqe, &pds[1]);
ret = io_uring_submit(&ring);
if (ret <= 0) {
fprintf(stderr, "sqe submit failed: %d\n", ret);
return 1;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait cqe failed: %d\n", ret);
return 1;
}
pd = io_uring_cqe_get_data(cqe);
if (pd->is_poll && cqe->res != -ECANCELED) {
fprintf(stderr ,"sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
} else if (pd->is_cancel && cqe->res) {
fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
}
io_uring_cqe_seen(&ring, cqe);
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait_cqe: %d\n", ret);
return 1;
}
pd = io_uring_cqe_get_data(cqe);
if (pd->is_poll && cqe->res != -ECANCELED) {
fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
} else if (pd->is_cancel && cqe->res) {
fprintf(stderr, "sqe (add=%d/remove=%d) failed with %ld\n",
pd->is_poll, pd->is_cancel,
(long) cqe->res);
return 1;
}
io_uring_cqe_seen(&ring, cqe);
return 0;
}
|
