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
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
|
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: run various openat2(2) tests
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/uio.h>
#include "helpers.h"
#include "liburing.h"
static int test_openat2(struct io_uring *ring, const char *path, int dfd,
bool direct, int fixed_index, int bad_how)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct open_how __how, *how;
int ret;
if (bad_how)
how = (struct open_how *) (uintptr_t) 0x1234;
else
how = &__how;
sqe = io_uring_get_sqe(ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
return -1;
}
if (!bad_how) {
memset(how, 0, sizeof(*how));
how->flags = O_RDWR;
}
if (!direct)
io_uring_prep_openat2(sqe, dfd, path, how);
else
io_uring_prep_openat2_direct(sqe, dfd, path, how, fixed_index);
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);
if (direct && ret > 0) {
close(ret);
return -EINVAL;
}
return ret;
}
static int test_open_fixed(const char *path, int dfd)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct io_uring ring;
const char pattern = 0xac;
char buffer[] = { 0, 0 };
int i, ret, fd = -1;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return -1;
}
ret = io_uring_register_files(&ring, &fd, 1);
if (ret) {
if (ret == -EINVAL || ret == -EBADF)
return 0;
fprintf(stderr, "%s: register ret=%d\n", __FUNCTION__, ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, 0, 0);
if (ret == -EINVAL) {
printf("fixed open isn't supported\n");
return 1;
} else if (ret) {
fprintf(stderr, "direct open failed %d\n", ret);
return -1;
}
sqe = io_uring_get_sqe(&ring);
io_uring_prep_write(sqe, 0, &pattern, 1, 0);
sqe->user_data = 1;
sqe->flags |= IOSQE_FIXED_FILE | IOSQE_IO_LINK;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_read(sqe, 0, buffer, 1, 0);
sqe->user_data = 2;
sqe->flags |= IOSQE_FIXED_FILE;
ret = io_uring_submit(&ring);
if (ret != 2) {
fprintf(stderr, "%s: got %d, wanted 2\n", __FUNCTION__, ret);
return -1;
}
for (i = 0; i < 2; i++) {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait completion %d\n", ret);
return -1;
}
if (cqe->res != 1) {
fprintf(stderr, "unexpectetd ret %d\n", cqe->res);
return -1;
}
io_uring_cqe_seen(&ring, cqe);
}
if (memcmp(&pattern, buffer, 1) != 0) {
fprintf(stderr, "buf validation failed\n");
return -1;
}
io_uring_queue_exit(&ring);
return 0;
}
static int test_open_fixed_fail(const char *path, int dfd)
{
struct io_uring ring;
int ret, fd = -1;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return -1;
}
ret = test_openat2(&ring, path, dfd, true, 0, 0);
if (ret != -ENXIO) {
fprintf(stderr, "install into not existing table, %i\n", ret);
return 1;
}
ret = io_uring_register_files(&ring, &fd, 1);
if (ret) {
if (ret == -EINVAL || ret == -EBADF)
return 0;
fprintf(stderr, "%s: register ret=%d\n", __FUNCTION__, ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, 1, 0);
if (ret != -EINVAL) {
fprintf(stderr, "install out of bounds, %i\n", ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, (1u << 16), 0);
if (ret != -EINVAL) {
fprintf(stderr, "install out of bounds or u16 overflow, %i\n", ret);
return -1;
}
ret = test_openat2(&ring, path, dfd, true, (1u << 16) + 1, 0);
if (ret != -EINVAL) {
fprintf(stderr, "install out of bounds or u16 overflow, %i\n", ret);
return -1;
}
io_uring_queue_exit(&ring);
return 0;
}
static int test_direct_reinstall(const char *path, int dfd)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
char buf[1] = { 0xfa };
struct io_uring ring;
int ret, pipe_fds[2];
ssize_t ret2;
if (pipe2(pipe_fds, O_NONBLOCK)) {
fprintf(stderr, "pipe() failed\n");
return -1;
}
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return -1;
}
ret = io_uring_register_files(&ring, pipe_fds, 2);
if (ret) {
fprintf(stderr, "%s: register ret=%d\n", __FUNCTION__, ret);
return -1;
}
/* reinstall into the second slot */
ret = test_openat2(&ring, path, dfd, true, 1, 0);
if (ret != 0) {
fprintf(stderr, "reinstall failed, %i\n", ret);
return -1;
}
/* verify it's reinstalled, first write into the slot... */
sqe = io_uring_get_sqe(&ring);
io_uring_prep_write(sqe, 1, buf, sizeof(buf), 0);
sqe->flags |= IOSQE_FIXED_FILE;
ret = io_uring_submit(&ring);
if (ret != 1) {
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 ret;
}
ret = cqe->res;
io_uring_cqe_seen(&ring, cqe);
if (ret != 1) {
fprintf(stderr, "invalid write %i\n", ret);
return -1;
}
/* ... and make sure nothing has been written to the pipe */
ret2 = read(pipe_fds[0], buf, 1);
if (ret2 != 0 && !(ret2 < 0 && errno == EAGAIN)) {
fprintf(stderr, "invalid pipe read, %d %d\n", errno, (int)ret2);
return -1;
}
close(pipe_fds[0]);
close(pipe_fds[1]);
io_uring_queue_exit(&ring);
return 0;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
const char *path, *path_rel;
int ret, do_unlink;
ret = io_uring_queue_init(8, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return 1;
}
if (argc > 1) {
path = "/tmp/.open.at2";
path_rel = argv[1];
do_unlink = 0;
} else {
path = "/tmp/.open.at2";
path_rel = ".open.at2";
do_unlink = 1;
}
t_create_file(path, 4096);
if (do_unlink)
t_create_file(path_rel, 4096);
ret = test_openat2(&ring, path, -1, false, 0, 0);
if (ret < 0) {
if (ret == -EINVAL) {
fprintf(stdout, "openat2 not supported, skipping\n");
goto done;
}
if (ret == -EPERM || ret == -EACCES)
return T_EXIT_SKIP;
fprintf(stderr, "test_openat2 absolute failed: %d\n", ret);
goto err;
}
ret = test_openat2(&ring, path_rel, AT_FDCWD, false, 0, 0);
if (ret < 0) {
if (ret == -EPERM || ret == -EACCES)
return T_EXIT_SKIP;
fprintf(stderr, "test_openat2 relative failed: %d\n", ret);
goto err;
}
ret = test_open_fixed(path, -1);
if (ret > 0)
goto done;
if (ret) {
fprintf(stderr, "test_open_fixed failed\n");
goto err;
}
ret = test_open_fixed_fail(path, -1);
if (ret) {
fprintf(stderr, "test_open_fixed_fail failed\n");
goto err;
}
ret = test_direct_reinstall(path, -1);
if (ret) {
fprintf(stderr, "test_direct_reinstall failed\n");
goto err;
}
ret = test_openat2(&ring, (const char *) (uintptr_t) 0x1234, AT_FDCWD, false, 0, 0);
if (ret != -EFAULT) {
fprintf(stderr, "test_openat2 bad address failed: %d\n", ret);
goto err;
}
ret = test_openat2(&ring, path_rel, AT_FDCWD, false, 0, 1);
if (ret != -EFAULT) {
fprintf(stderr, "test_openat2 bad how failed: %d\n", ret);
goto err;
}
done:
unlink(path);
if (do_unlink)
unlink(path_rel);
return 0;
err:
unlink(path);
if (do_unlink)
unlink(path_rel);
return 1;
}
|
