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
|
/* SPDX-License-Identifier: MIT */
/*
* Description: run various openat(2) tests
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <limits.h>
#include "helpers.h"
#include "liburing.h"
#define FDS 800
static int no_direct_pick;
static int submit_wait(struct io_uring *ring)
{
struct io_uring_cqe *cqe;
int ret;
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 completion %d\n", ret);
return 1;
}
ret = cqe->res;
io_uring_cqe_seen(ring, cqe);
return ret;
}
static inline int try_close(struct io_uring *ring, int slot)
{
struct io_uring_sqe *sqe;
sqe = io_uring_get_sqe(ring);
io_uring_prep_close_direct(sqe, slot);
return submit_wait(ring);
}
static int do_opens(struct io_uring *ring, const char *path, int nr,
int expect_enfile)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
int i, ret;
for (i = 0; i < nr; i++) {
sqe = io_uring_get_sqe(ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
goto err;
}
io_uring_prep_openat_direct(sqe, -1, path, O_RDONLY, 0, 0);
sqe->file_index = UINT_MAX;
ret = io_uring_submit(ring);
if (ret <= 0) {
fprintf(stderr, "sqe submit failed: %d\n", ret);
goto err;
}
}
for (i = 0; i < nr; i++) {
ret = io_uring_wait_cqe(ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait completion %d\n", ret);
goto err;
}
ret = cqe->res;
if (ret < 0) {
if (!expect_enfile || ret != -ENFILE) {
printf("open=%d, %d\n", cqe->res, i);
goto err;
}
if (!i && ret == -EINVAL) {
no_direct_pick = 1;
return 0;
}
}
io_uring_cqe_seen(ring, cqe);
}
return 0;
err:
return 1;
}
static int test_openat(struct io_uring *ring, const char *path)
{
int ret, i;
/* open all */
ret = do_opens(ring, path, FDS, 0);
if (ret)
goto err;
if (no_direct_pick)
return 0;
/* now close 100 randomly */
for (i = 0; i < 100; i++) {
do {
int slot = rand() % FDS;
ret = try_close(ring, slot);
if (ret == -EBADF)
continue;
break;
} while (1);
}
/* opening 100 should work, we closed 100 */
ret = do_opens(ring, path, 100, 0);
if (ret)
goto err;
/* we should be full now, expect -ENFILE */
ret = do_opens(ring, path, 1, 1);
if (ret)
goto err;
return ret;
err:
fprintf(stderr,"%s: err=%d\n", __FUNCTION__, ret);
return -1;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
const char *path;
int ret;
if (argc > 1)
return 0;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return 1;
}
ret = io_uring_register_files_sparse(&ring, FDS);
if (ret ) {
if (ret != -EINVAL) {
fprintf(stderr, "Sparse file registration failed\n");
return 1;
}
/* skip, kernel doesn't support sparse file array */
return 0;
}
path = "/tmp/.open.close";
t_create_file(path, 4096);
ret = test_openat(&ring, path);
if (ret < 0) {
if (ret == -EINVAL) {
fprintf(stdout, "Open not supported, skipping\n");
goto done;
}
fprintf(stderr, "test_openat absolute failed: %d\n", ret);
goto err;
}
done:
unlink(path);
return 0;
err:
unlink(path);
return 1;
}
|
