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
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
|
#include "../config-host.h"
/* 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 <poll.h>
#include <sys/wait.h>
#include <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);
}
static int test_poll_cancel(void)
{
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 (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, (__u64)(uintptr_t)&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;
}
close(pipe1[0]);
close(pipe1[1]);
io_uring_cqe_seen(&ring, cqe);
io_uring_queue_exit(&ring);
return 0;
}
static int __test_poll_cancel_with_timeouts(void)
{
struct __kernel_timespec ts = { .tv_sec = 10, };
struct io_uring ring, ring2;
struct io_uring_sqe *sqe;
int ret, off_nr = 1000;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return 1;
}
ret = io_uring_queue_init(1, &ring2, 0);
if (ret) {
fprintf(stderr, "ring setup failed: %d\n", ret);
return 1;
}
/* test timeout-offset triggering path during cancellation */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_timeout(sqe, &ts, off_nr, 0);
/* poll ring2 to trigger cancellation on exit() */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_poll_add(sqe, ring2.ring_fd, POLLIN);
sqe->flags |= IOSQE_IO_LINK;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_link_timeout(sqe, &ts, 0);
ret = io_uring_submit(&ring);
if (ret != 3) {
fprintf(stderr, "sqe submit failed\n");
return 1;
}
/* just drop all rings/etc. intact, exit() will clean them up */
return 0;
}
static int test_poll_cancel_with_timeouts(void)
{
int ret;
pid_t p;
p = fork();
if (p == -1) {
fprintf(stderr, "fork() failed\n");
return 1;
}
if (p == 0) {
ret = __test_poll_cancel_with_timeouts();
exit(ret);
} else {
int wstatus;
if (waitpid(p, &wstatus, 0) == (pid_t)-1) {
perror("waitpid()");
return 1;
}
if (!WIFEXITED(wstatus) || WEXITSTATUS(wstatus)) {
fprintf(stderr, "child failed %i\n", WEXITSTATUS(wstatus));
return 1;
}
}
return 0;
}
int main(int argc, char *argv[])
{
int ret;
if (argc > 1)
return 0;
ret = test_poll_cancel();
if (ret) {
fprintf(stderr, "test_poll_cancel failed\n");
return -1;
}
ret = test_poll_cancel_with_timeouts();
if (ret) {
fprintf(stderr, "test_poll_cancel_with_timeouts failed\n");
return -1;
}
return 0;
}
|
