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
230
231
232
233
234
235
236
|
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: test io_uring_register_sync_cancel()
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "liburing.h"
#include "helpers.h"
static int no_sync_cancel;
static int test_sync_cancel_timeout(struct io_uring *ring, int async)
{
struct io_uring_sync_cancel_reg reg = { };
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int ret, fds[2], to_prep;
char buf[32];
if (pipe(fds) < 0) {
perror("pipe");
return 1;
}
to_prep = 1;
sqe = io_uring_get_sqe(ring);
io_uring_prep_read(sqe, fds[0], buf, sizeof(buf), 0);
sqe->user_data = 0x89;
if (async)
sqe->flags |= IOSQE_ASYNC;
ret = io_uring_submit(ring);
if (ret != to_prep) {
fprintf(stderr, "submit=%d\n", ret);
return 1;
}
usleep(10000);
reg.addr = 0x89;
reg.timeout.tv_nsec = 1;
ret = io_uring_register_sync_cancel(ring, ®);
if (async) {
/* we expect -ETIME here, but can race and get 0 */
if (ret != -ETIME && ret != 0) {
fprintf(stderr, "sync_cancel=%d\n", ret);
return 1;
}
} else {
if (ret < 0) {
fprintf(stderr, "sync_cancel=%d\n", ret);
return 1;
}
}
/*
* we could _almost_ use peek_cqe() here, but there is still
* a small gap where io-wq is done with the request and on
* its way to posting a completion, but hasn't done it just
* yet. the request is canceled and won't be doing any IO
* to buffers etc, but the cqe may not have quite arrived yet.
*/
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "peek=%d\n", ret);
return 1;
}
if (cqe->res >= 0) {
fprintf(stderr, "cqe->res=%d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
return 0;
}
static int test_sync_cancel(struct io_uring *ring, int async, int nr_all,
int use_fd)
{
struct io_uring_sync_cancel_reg reg = { };
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
int ret, fds[2], to_prep, i;
char buf[32];
if (pipe(fds) < 0) {
perror("pipe");
return 1;
}
to_prep = 1;
if (nr_all)
to_prep = 4;
for (i = 0; i < to_prep; i++) {
sqe = io_uring_get_sqe(ring);
io_uring_prep_read(sqe, fds[0], buf, sizeof(buf), 0);
sqe->user_data = 0x89;
if (async)
sqe->flags |= IOSQE_ASYNC;
}
ret = io_uring_submit(ring);
if (ret != to_prep) {
fprintf(stderr, "submit=%d\n", ret);
return 1;
}
usleep(10000);
if (!use_fd)
reg.addr = 0x89;
else
reg.fd = fds[0];
reg.timeout.tv_sec = 200;
if (nr_all)
reg.flags |= IORING_ASYNC_CANCEL_ALL;
if (use_fd)
reg.flags |= IORING_ASYNC_CANCEL_FD;
ret = io_uring_register_sync_cancel(ring, ®);
if (ret < 0) {
if (ret == -EINVAL && !no_sync_cancel) {
no_sync_cancel = 1;
return 0;
}
fprintf(stderr, "sync_cancel=%d\n", ret);
return 1;
}
for (i = 0; i < to_prep; i++) {
/*
* we could _almost_ use peek_cqe() here, but there is still
* a small gap where io-wq is done with the request and on
* its way to posting a completion, but hasn't done it just
* yet. the request is canceled and won't be doing any IO
* to buffers etc, but the cqe may not have quite arrived yet.
*/
ret = io_uring_wait_cqe(ring, &cqe);
if (ret) {
fprintf(stderr, "peek=%d\n", ret);
return 1;
}
if (cqe->res >= 0) {
fprintf(stderr, "cqe->res=%d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(ring, cqe);
}
return 0;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
int ret;
if (argc > 1)
return T_EXIT_SKIP;
ret = t_create_ring(7, &ring, 0);
if (ret == T_SETUP_SKIP)
return T_EXIT_SKIP;
else if (ret != T_SETUP_OK)
return ret;
ret = test_sync_cancel(&ring, 0, 0, 0);
if (ret) {
fprintf(stderr, "test_sync_cancel 0 0 0 failed\n");
return T_EXIT_FAIL;
}
if (no_sync_cancel)
return T_EXIT_SKIP;
ret = test_sync_cancel(&ring, 1, 0, 0);
if (ret) {
fprintf(stderr, "test_sync_cancel 1 0 0 failed\n");
return T_EXIT_FAIL;
}
ret = test_sync_cancel(&ring, 0, 1, 0);
if (ret) {
fprintf(stderr, "test_sync_cancel 0 1 0 failed\n");
return T_EXIT_FAIL;
}
ret = test_sync_cancel(&ring, 1, 1, 0);
if (ret) {
fprintf(stderr, "test_sync_cancel 1 1 0 failed\n");
return T_EXIT_FAIL;
}
ret = test_sync_cancel(&ring, 0, 0, 1);
if (ret) {
fprintf(stderr, "test_sync_cancel 0 0 1 failed\n");
return T_EXIT_FAIL;
}
ret = test_sync_cancel(&ring, 1, 0, 1);
if (ret) {
fprintf(stderr, "test_sync_cancel 1 0 1 failed\n");
return T_EXIT_FAIL;
}
ret = test_sync_cancel(&ring, 0, 1, 1);
if (ret) {
fprintf(stderr, "test_sync_cancel 0 1 1 failed\n");
return T_EXIT_FAIL;
}
ret = test_sync_cancel(&ring, 1, 1, 1);
if (ret) {
fprintf(stderr, "test_sync_cancel 1 1 1 failed\n");
return T_EXIT_FAIL;
}
ret = test_sync_cancel_timeout(&ring, 0);
if (ret) {
fprintf(stderr, "test_sync_cancel_timeout 0\n");
return T_EXIT_FAIL;
}
/* must be last, leaves request */
ret = test_sync_cancel_timeout(&ring, 1);
if (ret) {
fprintf(stderr, "test_sync_cancel_timeout 1\n");
return T_EXIT_FAIL;
}
return T_EXIT_PASS;
}
|
