aboutsummaryrefslogtreecommitdiffstats
path: root/contrib/libs/liburing/test/helpers.c
blob: 0d897271d8ef9b8531586cdcb0c06fe455d56474 (plain) (blame)
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
#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
 * Description: Helpers for tests.
 */
#include <stdlib.h>
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdarg.h>
#include <sys/types.h>

#include <arpa/inet.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>

#include "helpers.h"
#include "liburing.h"

/*
 * Helper for allocating memory in tests.
 */
void *t_malloc(size_t size)
{
	void *ret;
	ret = malloc(size);
	assert(ret);
	return ret;
}

/*
 * Helper for binding socket to an ephemeral port.
 * The port number to be bound is returned in @addr->sin_port.
 */
int t_bind_ephemeral_port(int fd, struct sockaddr_in *addr)
{
	socklen_t addrlen;
	int ret;

	addr->sin_port = 0;
	if (bind(fd, (struct sockaddr *)addr, sizeof(*addr)))
		return -errno;

	addrlen = sizeof(*addr);
	ret = getsockname(fd, (struct sockaddr *)addr, &addrlen);
	assert(!ret);
	assert(addr->sin_port != 0);
	return 0;
}

/*
 * Helper for allocating size bytes aligned on a boundary.
 */
void t_posix_memalign(void **memptr, size_t alignment, size_t size)
{
	int ret;
	ret = posix_memalign(memptr, alignment, size);
	assert(!ret);
}

/*
 * Helper for allocating space for an array of nmemb elements
 * with size bytes for each element.
 */
void *t_calloc(size_t nmemb, size_t size)
{
	void *ret;
	ret = calloc(nmemb, size);
	assert(ret);
	return ret;
}

/*
 * Helper for creating file and write @size byte buf with 0xaa value in the file.
 */
static void __t_create_file(const char *file, size_t size, char pattern)
{
	ssize_t ret;
	char *buf;
	int fd;

	buf = t_malloc(size);
	memset(buf, pattern, size);

	fd = open(file, O_WRONLY | O_CREAT, 0644);
	assert(fd >= 0);

	ret = write(fd, buf, size);
	fsync(fd);
	close(fd);
	free(buf);
	assert(ret == size);
}

void t_create_file(const char *file, size_t size)
{
	__t_create_file(file, size, 0xaa);
}

void t_create_file_pattern(const char *file, size_t size, char pattern)
{
	__t_create_file(file, size, pattern);
}

/*
 * Helper for creating @buf_num number of iovec
 * with @buf_size bytes buffer of each iovec.
 */
struct iovec *t_create_buffers(size_t buf_num, size_t buf_size)
{
	struct iovec *vecs;
	int i;

	vecs = t_malloc(buf_num * sizeof(struct iovec));
	for (i = 0; i < buf_num; i++) {
		t_posix_memalign(&vecs[i].iov_base, buf_size, buf_size);
		vecs[i].iov_len = buf_size;
	}
	return vecs;
}

/*
 * Helper for setting up an io_uring instance, skipping if the given user isn't
 * allowed to.
 */
enum t_setup_ret t_create_ring_params(int depth, struct io_uring *ring,
				      struct io_uring_params *p)
{
	int ret;

	ret = io_uring_queue_init_params(depth, ring, p);
	if (!ret)
		return T_SETUP_OK;
	if ((p->flags & IORING_SETUP_SQPOLL) && ret == -EPERM && geteuid()) {
		fprintf(stdout, "SQPOLL skipped for regular user\n");
		return T_SETUP_SKIP;
	}

	if (ret != -EINVAL)
		fprintf(stderr, "queue_init: %s\n", strerror(-ret));
	return ret;
}

enum t_setup_ret t_create_ring(int depth, struct io_uring *ring,
			       unsigned int flags)
{
	struct io_uring_params p = { };

	p.flags = flags;
	return t_create_ring_params(depth, ring, &p);
}

enum t_setup_ret t_register_buffers(struct io_uring *ring,
				    const struct iovec *iovecs,
				    unsigned nr_iovecs)
{
	int ret;

	ret = io_uring_register_buffers(ring, iovecs, nr_iovecs);
	if (!ret)
		return T_SETUP_OK;

	if ((ret == -EPERM || ret == -ENOMEM) && geteuid()) {
		fprintf(stdout, "too large non-root buffer registration, skip\n");
		return T_SETUP_SKIP;
	}

	fprintf(stderr, "buffer register failed: %s\n", strerror(-ret));
	return ret;
}

int t_create_socket_pair(int fd[2], bool stream)
{
	int ret;
	int type = stream ? SOCK_STREAM : SOCK_DGRAM;
	int val;
	struct sockaddr_in serv_addr;
	struct sockaddr *paddr;
	socklen_t paddrlen;

	type |= SOCK_CLOEXEC;
	fd[0] = socket(AF_INET, type, 0);
	if (fd[0] < 0)
		return errno;
	fd[1] = socket(AF_INET, type, 0);
	if (fd[1] < 0) {
		ret = errno;
		close(fd[0]);
		return ret;
	}

	val = 1;
	if (setsockopt(fd[0], SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val)))
		goto errno_cleanup;

	memset(&serv_addr, 0, sizeof(serv_addr));
	serv_addr.sin_family = AF_INET;
	serv_addr.sin_port = 0;
	inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr);

	paddr = (struct sockaddr *)&serv_addr;
	paddrlen = sizeof(serv_addr);

	if (bind(fd[0], paddr, paddrlen)) {
		fprintf(stderr, "bind failed\n");
		goto errno_cleanup;
	}

	if (stream && listen(fd[0], 16)) {
		fprintf(stderr, "listen failed\n");
		goto errno_cleanup;
	}

	if (getsockname(fd[0], (struct sockaddr *)&serv_addr,
			(socklen_t *)&paddrlen)) {
		fprintf(stderr, "getsockname failed\n");
		goto errno_cleanup;
	}
	inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr);

	if (connect(fd[1], (struct sockaddr *)&serv_addr, paddrlen)) {
		fprintf(stderr, "connect failed\n");
		goto errno_cleanup;
	}

	if (!stream) {
		/* connect the other udp side */
		if (getsockname(fd[1], (struct sockaddr *)&serv_addr,
				(socklen_t *)&paddrlen)) {
			fprintf(stderr, "getsockname failed\n");
			goto errno_cleanup;
		}
		inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr);

		if (connect(fd[0], (struct sockaddr *)&serv_addr, paddrlen)) {
			fprintf(stderr, "connect failed\n");
			goto errno_cleanup;
		}
		return 0;
	}

	/* for stream case we must accept and cleanup the listen socket */

	ret = accept(fd[0], NULL, NULL);
	if (ret < 0)
		goto errno_cleanup;

	close(fd[0]);
	fd[0] = ret;

	return 0;

errno_cleanup:
	ret = errno;
	close(fd[0]);
	close(fd[1]);
	return ret;
}

bool t_probe_defer_taskrun(void)
{
	struct io_uring ring;
	int ret;

	ret = io_uring_queue_init(1, &ring, IORING_SETUP_SINGLE_ISSUER |
					    IORING_SETUP_DEFER_TASKRUN);
	if (ret < 0)
		return false;
	io_uring_queue_exit(&ring);
	return true;
}

/*
 * Sync internal state with kernel ring state on the SQ side. Returns the
 * number of pending items in the SQ ring, for the shared ring.
 */
unsigned __io_uring_flush_sq(struct io_uring *ring)
{
	struct io_uring_sq *sq = &ring->sq;
	unsigned tail = sq->sqe_tail;

	if (sq->sqe_head != tail) {
		sq->sqe_head = tail;
		/*
		 * Ensure kernel sees the SQE updates before the tail update.
		 */
		if (!(ring->flags & IORING_SETUP_SQPOLL))
			*sq->ktail = tail;
		else
			io_uring_smp_store_release(sq->ktail, tail);
	}
	/*
	* This load needs to be atomic, since sq->khead is written concurrently
	* by the kernel, but it doesn't need to be load_acquire, since the
	* kernel doesn't store to the submission queue; it advances khead just
	* to indicate that it's finished reading the submission queue entries
	* so they're available for us to write to.
	*/
	return tail - IO_URING_READ_ONCE(*sq->khead);
}

/*
 * Implementation of error(3), prints an error message and exits.
 */
void t_error(int status, int errnum, const char *format, ...)
{
	va_list args;
    	va_start(args, format);

	vfprintf(stderr, format, args);
    	if (errnum)
        	fprintf(stderr, ": %s", strerror(errnum));

	fprintf(stderr, "\n");
	va_end(args);
    	exit(status);
}