Commit | Line | Data |
---|---|---|
67c5b804 MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
74d81a6c | 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
67c5b804 | 4 | * |
15f672f9 MD |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public | |
7 | * License as published by the Free Software Foundation; only | |
8 | * version 2.1 of the License. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, | |
67c5b804 | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15f672f9 MD |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
67c5b804 MD |
18 | */ |
19 | ||
20 | #define _GNU_SOURCE | |
21 | #include <limits.h> | |
fb31eb73 | 22 | #include <stdint.h> |
67c5b804 MD |
23 | #include <stdio.h> |
24 | #include <stdlib.h> | |
25 | #include <string.h> | |
26 | #include <sys/socket.h> | |
27 | #include <sys/stat.h> | |
28 | #include <sys/types.h> | |
29 | #include <sys/un.h> | |
30 | #include <unistd.h> | |
31 | #include <assert.h> | |
57773204 | 32 | #include <errno.h> |
11ba4bcb | 33 | #include <fcntl.h> |
67c5b804 | 34 | |
32ce8569 | 35 | #include <lttng/ust-ctl.h> |
b728d87e | 36 | #include <ust-comm.h> |
6548fca4 | 37 | #include <ust-fd.h> |
74d81a6c | 38 | #include <helper.h> |
7bc53e94 | 39 | #include <lttng/ust-error.h> |
32ce8569 | 40 | #include <lttng/ust-events.h> |
53569322 | 41 | #include <lttng/ust-dynamic-type.h> |
32ce8569 MD |
42 | #include <usterr-signal-safe.h> |
43 | ||
44 | #include "../liblttng-ust/compat.h" | |
7bc53e94 MD |
45 | |
46 | #define USTCOMM_CODE_OFFSET(code) \ | |
47 | (code == LTTNG_UST_OK ? 0 : (code - LTTNG_UST_ERR + 1)) | |
67c5b804 | 48 | |
74d81a6c MD |
49 | #define USTCOMM_MAX_SEND_FDS 4 |
50 | ||
53569322 MD |
51 | static |
52 | ssize_t count_fields_recursive(size_t nr_fields, | |
53 | const struct lttng_event_field *lttng_fields); | |
54 | static | |
55 | int serialize_one_field(struct lttng_session *session, | |
56 | struct ustctl_field *fields, size_t *iter_output, | |
57 | const struct lttng_event_field *lf); | |
58 | ||
67c5b804 MD |
59 | /* |
60 | * Human readable error message. | |
61 | */ | |
57773204 | 62 | static const char *ustcomm_readable_code[] = { |
7bc53e94 MD |
63 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_OK) ] = "Success", |
64 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR) ] = "Unknown error", | |
65 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOENT) ] = "No entry", | |
64b2564e DG |
66 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXIST) ] = "Object already exists", |
67 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL) ] = "Invalid argument", | |
68 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PERM) ] = "Permission denied", | |
69 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOSYS) ] = "Not implemented", | |
74d81a6c | 70 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXITING) ] = "Process is exiting", |
32ce8569 MD |
71 | |
72 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_MAGIC) ] = "Invalid magic number", | |
73 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_SOCKET_TYPE) ] = "Invalid socket type", | |
74 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_UNSUP_MAJOR) ] = "Unsupported major version", | |
67c5b804 MD |
75 | }; |
76 | ||
77 | /* | |
7bc53e94 | 78 | * lttng_ust_strerror |
67c5b804 | 79 | * |
7bc53e94 MD |
80 | * Receives positive error value. |
81 | * Return ptr to string representing a human readable | |
82 | * error code from the ustcomm_return_code enum. | |
67c5b804 | 83 | */ |
7bc53e94 | 84 | const char *lttng_ust_strerror(int code) |
67c5b804 | 85 | { |
7bc53e94 MD |
86 | if (code == LTTNG_UST_OK) |
87 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
88 | if (code < LTTNG_UST_ERR) | |
89 | return strerror(code); | |
90 | if (code >= LTTNG_UST_ERR_NR) | |
91 | code = LTTNG_UST_ERR; | |
92 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
67c5b804 MD |
93 | } |
94 | ||
95 | /* | |
74d81a6c | 96 | * ustcomm_connect_unix_sock |
67c5b804 | 97 | * |
74d81a6c | 98 | * Connect to unix socket using the path name. |
6548fca4 MD |
99 | * |
100 | * Caller handles FD tracker. | |
67c5b804 | 101 | */ |
451d66b2 | 102 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
103 | { |
104 | struct sockaddr_un sun; | |
7bc53e94 | 105 | int fd, ret; |
67c5b804 | 106 | |
204d45df MD |
107 | /* |
108 | * libust threads require the close-on-exec flag for all | |
109 | * resources so it does not leak file descriptors upon exec. | |
6daf0c26 | 110 | * SOCK_CLOEXEC is not used since it is linux specific. |
204d45df | 111 | */ |
11ba4bcb | 112 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
67c5b804 | 113 | if (fd < 0) { |
32ce8569 | 114 | PERROR("socket"); |
7bc53e94 | 115 | ret = -errno; |
67c5b804 MD |
116 | goto error; |
117 | } | |
451d66b2 MD |
118 | if (timeout >= 0) { |
119 | /* Give at least 10ms. */ | |
120 | if (timeout < 10) | |
121 | timeout = 10; | |
122 | ret = ustcomm_setsockopt_snd_timeout(fd, timeout); | |
123 | if (ret < 0) { | |
124 | WARN("Error setting connect socket send timeout"); | |
125 | } | |
126 | } | |
11ba4bcb MD |
127 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); |
128 | if (ret < 0) { | |
32ce8569 | 129 | PERROR("fcntl"); |
7bc53e94 | 130 | ret = -errno; |
11ba4bcb MD |
131 | goto error_fcntl; |
132 | } | |
67c5b804 MD |
133 | |
134 | memset(&sun, 0, sizeof(sun)); | |
135 | sun.sun_family = AF_UNIX; | |
136 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
137 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
138 | ||
139 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
140 | if (ret < 0) { | |
141 | /* | |
0b9aa170 MD |
142 | * Don't print message on connect ENOENT error, because |
143 | * connect is used in normal execution to detect if | |
144 | * sessiond is alive. ENOENT is when the unix socket | |
145 | * file does not exist, and ECONNREFUSED is when the | |
146 | * file exists but no sessiond is listening. | |
67c5b804 | 147 | */ |
0b9aa170 | 148 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 149 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 150 | PERROR("connect"); |
7bc53e94 | 151 | ret = -errno; |
8cf811d3 MD |
152 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
153 | ret = -EPIPE; | |
67c5b804 MD |
154 | goto error_connect; |
155 | } | |
156 | ||
157 | return fd; | |
158 | ||
159 | error_connect: | |
11ba4bcb | 160 | error_fcntl: |
7bc53e94 MD |
161 | { |
162 | int closeret; | |
163 | ||
164 | closeret = close(fd); | |
165 | if (closeret) | |
32ce8569 | 166 | PERROR("close"); |
7bc53e94 | 167 | } |
67c5b804 MD |
168 | error: |
169 | return ret; | |
170 | } | |
171 | ||
172 | /* | |
74d81a6c | 173 | * ustcomm_accept_unix_sock |
67c5b804 | 174 | * |
74d81a6c MD |
175 | * Do an accept(2) on the sock and return the |
176 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 177 | */ |
57773204 | 178 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
179 | { |
180 | int new_fd; | |
181 | struct sockaddr_un sun; | |
182 | socklen_t len = 0; | |
183 | ||
184 | /* Blocking call */ | |
185 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
186 | if (new_fd < 0) { | |
b869b5ae MD |
187 | if (errno != ECONNABORTED) |
188 | PERROR("accept"); | |
189 | new_fd = -errno; | |
190 | if (new_fd == -ECONNABORTED) | |
191 | new_fd = -EPIPE; | |
67c5b804 | 192 | } |
67c5b804 | 193 | return new_fd; |
67c5b804 MD |
194 | } |
195 | ||
196 | /* | |
74d81a6c | 197 | * ustcomm_create_unix_sock |
67c5b804 | 198 | * |
74d81a6c MD |
199 | * Creates a AF_UNIX local socket using pathname |
200 | * bind the socket upon creation and return the fd. | |
67c5b804 | 201 | */ |
57773204 | 202 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
203 | { |
204 | struct sockaddr_un sun; | |
7bc53e94 | 205 | int fd, ret; |
67c5b804 MD |
206 | |
207 | /* Create server socket */ | |
208 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 209 | PERROR("socket"); |
7bc53e94 | 210 | ret = -errno; |
67c5b804 MD |
211 | goto error; |
212 | } | |
213 | ||
214 | memset(&sun, 0, sizeof(sun)); | |
215 | sun.sun_family = AF_UNIX; | |
216 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
217 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
218 | ||
219 | /* Unlink the old file if present */ | |
220 | (void) unlink(pathname); | |
221 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
222 | if (ret < 0) { | |
32ce8569 | 223 | PERROR("bind"); |
7bc53e94 MD |
224 | ret = -errno; |
225 | goto error_close; | |
67c5b804 MD |
226 | } |
227 | ||
228 | return fd; | |
229 | ||
7bc53e94 MD |
230 | error_close: |
231 | { | |
232 | int closeret; | |
233 | ||
234 | closeret = close(fd); | |
235 | if (closeret) { | |
32ce8569 | 236 | PERROR("close"); |
7bc53e94 MD |
237 | } |
238 | } | |
67c5b804 MD |
239 | error: |
240 | return ret; | |
241 | } | |
242 | ||
243 | /* | |
74d81a6c | 244 | * ustcomm_listen_unix_sock |
67c5b804 | 245 | * |
74d81a6c | 246 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 247 | */ |
57773204 | 248 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
249 | { |
250 | int ret; | |
251 | ||
e41474be | 252 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 253 | if (ret < 0) { |
7bc53e94 | 254 | ret = -errno; |
32ce8569 | 255 | PERROR("listen"); |
67c5b804 MD |
256 | } |
257 | ||
258 | return ret; | |
259 | } | |
260 | ||
261 | /* | |
74d81a6c MD |
262 | * ustcomm_close_unix_sock |
263 | * | |
264 | * Shutdown cleanly a unix socket. | |
6548fca4 MD |
265 | * |
266 | * Handles fd tracker internally. | |
74d81a6c MD |
267 | */ |
268 | int ustcomm_close_unix_sock(int sock) | |
269 | { | |
270 | int ret; | |
271 | ||
6548fca4 | 272 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 273 | ret = close(sock); |
6548fca4 MD |
274 | if (!ret) { |
275 | lttng_ust_delete_fd_from_tracker(sock); | |
276 | } else { | |
32ce8569 | 277 | PERROR("close"); |
74d81a6c MD |
278 | ret = -errno; |
279 | } | |
6548fca4 | 280 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
281 | |
282 | return ret; | |
283 | } | |
284 | ||
285 | /* | |
286 | * ustcomm_recv_unix_sock | |
67c5b804 | 287 | * |
74d81a6c MD |
288 | * Receive data of size len in put that data into |
289 | * the buf param. Using recvmsg API. | |
290 | * Return the size of received data. | |
291 | * Return 0 on orderly shutdown. | |
67c5b804 | 292 | */ |
57773204 | 293 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 294 | { |
913b87f1 | 295 | struct msghdr msg; |
67c5b804 | 296 | struct iovec iov[1]; |
89c5b6ec MD |
297 | ssize_t ret = -1; |
298 | size_t len_last; | |
67c5b804 | 299 | |
913b87f1 MD |
300 | memset(&msg, 0, sizeof(msg)); |
301 | ||
67c5b804 MD |
302 | iov[0].iov_base = buf; |
303 | iov[0].iov_len = len; | |
304 | msg.msg_iov = iov; | |
305 | msg.msg_iovlen = 1; | |
306 | ||
7e3cfcbe | 307 | do { |
89c5b6ec | 308 | len_last = iov[0].iov_len; |
7e3cfcbe | 309 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
310 | if (ret > 0) { |
311 | iov[0].iov_base += ret; | |
312 | iov[0].iov_len -= ret; | |
313 | assert(ret <= len_last); | |
314 | } | |
315 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
316 | |
317 | if (ret < 0) { | |
318 | int shutret; | |
319 | ||
8cf811d3 | 320 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 321 | PERROR("recvmsg"); |
7bc53e94 | 322 | ret = -errno; |
8cf811d3 | 323 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 324 | ret = -EPIPE; |
7bc53e94 MD |
325 | |
326 | shutret = shutdown(sock, SHUT_RDWR); | |
327 | if (shutret) | |
32ce8569 | 328 | ERR("Socket shutdown error"); |
89c5b6ec MD |
329 | } else if (ret > 0) { |
330 | ret = len; | |
67c5b804 | 331 | } |
89c5b6ec | 332 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
333 | |
334 | return ret; | |
335 | } | |
336 | ||
337 | /* | |
74d81a6c | 338 | * ustcomm_send_unix_sock |
67c5b804 | 339 | * |
74d81a6c MD |
340 | * Send buf data of size len. Using sendmsg API. |
341 | * Return the size of sent data. | |
67c5b804 | 342 | */ |
32ce8569 | 343 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 344 | { |
913b87f1 | 345 | struct msghdr msg; |
67c5b804 | 346 | struct iovec iov[1]; |
7bc53e94 | 347 | ssize_t ret; |
67c5b804 | 348 | |
913b87f1 MD |
349 | memset(&msg, 0, sizeof(msg)); |
350 | ||
32ce8569 | 351 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
352 | iov[0].iov_len = len; |
353 | msg.msg_iov = iov; | |
354 | msg.msg_iovlen = 1; | |
355 | ||
1ea11eab MD |
356 | /* |
357 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
358 | * libust, so libust does not receive an unhandled SIGPIPE or | |
359 | * SIGURG. The sessiond receiver side can be made more resilient | |
360 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
361 | * libust side. | |
362 | */ | |
51d9d699 MD |
363 | do { |
364 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
365 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
366 | |
367 | if (ret < 0) { | |
368 | int shutret; | |
369 | ||
74d81a6c | 370 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 371 | PERROR("sendmsg"); |
7bc53e94 | 372 | ret = -errno; |
b869b5ae MD |
373 | if (ret == -ECONNRESET) |
374 | ret = -EPIPE; | |
7bc53e94 MD |
375 | |
376 | shutret = shutdown(sock, SHUT_RDWR); | |
377 | if (shutret) | |
32ce8569 | 378 | ERR("Socket shutdown error"); |
67c5b804 MD |
379 | } |
380 | ||
381 | return ret; | |
382 | } | |
383 | ||
384 | /* | |
74d81a6c | 385 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 386 | * |
74d81a6c | 387 | * Returns the size of data sent, or negative error value. |
67c5b804 | 388 | */ |
74d81a6c | 389 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 390 | { |
913b87f1 | 391 | struct msghdr msg; |
67c5b804 MD |
392 | struct cmsghdr *cmptr; |
393 | struct iovec iov[1]; | |
394 | ssize_t ret = -1; | |
395 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
396 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 397 | char dummy = 0; |
67c5b804 | 398 | |
913b87f1 | 399 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 400 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 401 | |
74d81a6c MD |
402 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
403 | return -EINVAL; | |
67c5b804 MD |
404 | |
405 | msg.msg_control = (caddr_t)tmp; | |
406 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
407 | ||
408 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
409 | if (!cmptr) |
410 | return -EINVAL; | |
67c5b804 MD |
411 | cmptr->cmsg_level = SOL_SOCKET; |
412 | cmptr->cmsg_type = SCM_RIGHTS; | |
413 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
414 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
415 | /* Sum of the length of all control messages in the buffer: */ | |
416 | msg.msg_controllen = cmptr->cmsg_len; | |
417 | ||
74d81a6c MD |
418 | iov[0].iov_base = &dummy; |
419 | iov[0].iov_len = 1; | |
67c5b804 MD |
420 | msg.msg_iov = iov; |
421 | msg.msg_iovlen = 1; | |
422 | ||
51d9d699 | 423 | do { |
0dafcd63 | 424 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 425 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 426 | if (ret < 0) { |
74d81a6c MD |
427 | /* |
428 | * We consider EPIPE and ECONNRESET as expected. | |
429 | */ | |
430 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 431 | PERROR("sendmsg"); |
74d81a6c | 432 | } |
b869b5ae MD |
433 | ret = -errno; |
434 | if (ret == -ECONNRESET) | |
435 | ret = -EPIPE; | |
74d81a6c MD |
436 | } |
437 | return ret; | |
438 | } | |
7bc53e94 | 439 | |
74d81a6c MD |
440 | /* |
441 | * Recv a message accompanied by fd(s) from a unix socket. | |
442 | * | |
74d81a6c MD |
443 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
444 | * actually received in nb_fd. | |
445 | * Returns -EPIPE on orderly shutdown. | |
446 | */ | |
447 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
448 | { | |
449 | struct iovec iov[1]; | |
450 | ssize_t ret = 0; | |
451 | struct cmsghdr *cmsg; | |
452 | size_t sizeof_fds = nb_fd * sizeof(int); | |
453 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
454 | struct msghdr msg; | |
455 | char dummy; | |
6daf0c26 | 456 | int i; |
7bc53e94 | 457 | |
74d81a6c | 458 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 459 | |
74d81a6c MD |
460 | /* Prepare to receive the structures */ |
461 | iov[0].iov_base = &dummy; | |
462 | iov[0].iov_len = 1; | |
463 | msg.msg_iov = iov; | |
464 | msg.msg_iovlen = 1; | |
465 | msg.msg_control = recv_fd; | |
466 | msg.msg_controllen = sizeof(recv_fd); | |
467 | ||
468 | do { | |
469 | ret = recvmsg(sock, &msg, 0); | |
470 | } while (ret < 0 && errno == EINTR); | |
471 | if (ret < 0) { | |
472 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 473 | PERROR("recvmsg fds"); |
74d81a6c | 474 | } |
8cf811d3 | 475 | ret = -errno; |
b869b5ae MD |
476 | if (ret == -ECONNRESET) |
477 | ret = -EPIPE; | |
74d81a6c MD |
478 | goto end; |
479 | } | |
480 | if (ret == 0) { | |
481 | /* orderly shutdown */ | |
482 | ret = -EPIPE; | |
483 | goto end; | |
484 | } | |
485 | if (ret != 1) { | |
32ce8569 | 486 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
487 | ret, 1); |
488 | goto end; | |
489 | } | |
490 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 491 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
492 | ret = -1; |
493 | goto end; | |
494 | } | |
495 | cmsg = CMSG_FIRSTHDR(&msg); | |
496 | if (!cmsg) { | |
32ce8569 | 497 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
498 | ret = -1; |
499 | goto end; | |
500 | } | |
501 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 502 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
503 | ret = -1; |
504 | goto end; | |
505 | } | |
506 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 507 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
508 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
509 | ret = -1; | |
510 | goto end; | |
511 | } | |
6daf0c26 | 512 | |
74d81a6c | 513 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); |
6daf0c26 JR |
514 | |
515 | /* Set FD_CLOEXEC */ | |
516 | for (i = 0; i < nb_fd; i++) { | |
517 | ret = fcntl(fds[i], F_SETFD, FD_CLOEXEC); | |
518 | if (ret < 0) { | |
519 | PERROR("fcntl failed to set FD_CLOEXEC on fd %d", | |
520 | fds[i]); | |
521 | } | |
522 | } | |
523 | ||
6b32a5c3 | 524 | ret = nb_fd; |
74d81a6c | 525 | end: |
67c5b804 MD |
526 | return ret; |
527 | } | |
57773204 MD |
528 | |
529 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
530 | { | |
531 | ssize_t len; | |
532 | ||
533 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
534 | switch (len) { | |
535 | case sizeof(*lum): | |
57773204 | 536 | break; |
57773204 | 537 | default: |
7bc53e94 | 538 | if (len < 0) { |
7bc53e94 MD |
539 | return len; |
540 | } else { | |
32ce8569 | 541 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
542 | return -EINVAL; |
543 | } | |
57773204 MD |
544 | } |
545 | return 0; | |
546 | } | |
547 | ||
548 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
549 | uint32_t expected_handle, uint32_t expected_cmd) | |
550 | { | |
551 | ssize_t len; | |
552 | ||
553 | memset(lur, 0, sizeof(*lur)); | |
554 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
555 | switch (len) { | |
556 | case 0: /* orderly shutdown */ | |
74d81a6c | 557 | return -EPIPE; |
57773204 | 558 | case sizeof(*lur): |
5dafeeaa MD |
559 | { |
560 | int err = 0; | |
561 | ||
57773204 | 562 | if (lur->handle != expected_handle) { |
32ce8569 | 563 | ERR("Unexpected result message handle: " |
74d81a6c MD |
564 | "expected: %u vs received: %u\n", |
565 | expected_handle, lur->handle); | |
5dafeeaa | 566 | err = 1; |
57773204 | 567 | } |
57773204 | 568 | if (lur->cmd != expected_cmd) { |
32ce8569 | 569 | ERR("Unexpected result message command " |
74d81a6c MD |
570 | "expected: %u vs received: %u\n", |
571 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
572 | err = 1; |
573 | } | |
574 | if (err) { | |
57773204 | 575 | return -EINVAL; |
5dafeeaa MD |
576 | } else { |
577 | return lur->ret_code; | |
57773204 | 578 | } |
5dafeeaa | 579 | } |
57773204 | 580 | default: |
8cf811d3 | 581 | if (len >= 0) { |
32ce8569 | 582 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 583 | } |
8cf811d3 | 584 | return len; |
57773204 MD |
585 | } |
586 | } | |
587 | ||
588 | int ustcomm_send_app_cmd(int sock, | |
589 | struct ustcomm_ust_msg *lum, | |
590 | struct ustcomm_ust_reply *lur) | |
591 | { | |
592 | int ret; | |
593 | ||
594 | ret = ustcomm_send_app_msg(sock, lum); | |
595 | if (ret) | |
596 | return ret; | |
c354a72c MD |
597 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
598 | if (ret > 0) | |
599 | return -EIO; | |
600 | return ret; | |
57773204 MD |
601 | } |
602 | ||
57773204 | 603 | /* |
74d81a6c MD |
604 | * chan_data is allocated internally if this function returns the |
605 | * expected var_len. | |
57773204 | 606 | */ |
74d81a6c | 607 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
608 | void **_chan_data, uint64_t var_len, |
609 | int *_wakeup_fd) | |
57773204 | 610 | { |
74d81a6c | 611 | void *chan_data; |
ff0f5728 | 612 | ssize_t len, nr_fd; |
f5c453e9 | 613 | int wakeup_fd, ret; |
57773204 | 614 | |
74d81a6c MD |
615 | if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) { |
616 | len = -EINVAL; | |
617 | goto error_check; | |
57773204 | 618 | } |
74d81a6c MD |
619 | /* Receive variable length data */ |
620 | chan_data = zmalloc(var_len); | |
621 | if (!chan_data) { | |
622 | len = -ENOMEM; | |
623 | goto error_alloc; | |
57773204 | 624 | } |
74d81a6c MD |
625 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
626 | if (len != var_len) { | |
627 | goto error_recv; | |
57773204 | 628 | } |
ff0f5728 | 629 | /* recv wakeup fd */ |
6548fca4 | 630 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
631 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
632 | if (nr_fd <= 0) { | |
6548fca4 | 633 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
634 | if (nr_fd < 0) { |
635 | len = nr_fd; | |
636 | goto error_recv; | |
637 | } else { | |
638 | len = -EIO; | |
639 | goto error_recv; | |
640 | } | |
641 | } | |
f5c453e9 JR |
642 | |
643 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
644 | if (ret < 0) { | |
f5c453e9 JR |
645 | ret = close(wakeup_fd); |
646 | if (ret) { | |
647 | PERROR("close on wakeup_fd"); | |
648 | } | |
649 | len = -EIO; | |
20d1999d | 650 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
651 | goto error_recv; |
652 | } | |
653 | ||
654 | *_wakeup_fd = ret; | |
6548fca4 | 655 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 656 | |
74d81a6c MD |
657 | *_chan_data = chan_data; |
658 | return len; | |
659 | ||
660 | error_recv: | |
661 | free(chan_data); | |
662 | error_alloc: | |
663 | error_check: | |
664 | return len; | |
665 | } | |
7bc53e94 | 666 | |
74d81a6c MD |
667 | int ustcomm_recv_stream_from_sessiond(int sock, |
668 | uint64_t *memory_map_size, | |
669 | int *shm_fd, int *wakeup_fd) | |
670 | { | |
671 | ssize_t len; | |
672 | int ret; | |
673 | int fds[2]; | |
674 | ||
675 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 676 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
677 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
678 | if (len <= 0) { | |
6548fca4 | 679 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
680 | if (len < 0) { |
681 | ret = len; | |
682 | goto error; | |
683 | } else { | |
684 | ret = -EIO; | |
685 | goto error; | |
686 | } | |
7bc53e94 | 687 | } |
f5c453e9 JR |
688 | |
689 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
690 | if (ret < 0) { | |
f5c453e9 JR |
691 | ret = close(fds[0]); |
692 | if (ret) { | |
693 | PERROR("close on received shm_fd"); | |
694 | } | |
695 | ret = -EIO; | |
20d1999d | 696 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
697 | goto error; |
698 | } | |
699 | *shm_fd = ret; | |
700 | ||
701 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
702 | if (ret < 0) { | |
f5c453e9 JR |
703 | ret = close(*shm_fd); |
704 | if (ret) { | |
705 | PERROR("close on shm_fd"); | |
706 | } | |
707 | *shm_fd = -1; | |
708 | ret = close(fds[1]); | |
709 | if (ret) { | |
710 | PERROR("close on received wakeup_fd"); | |
711 | } | |
712 | ret = -EIO; | |
20d1999d | 713 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
714 | goto error; |
715 | } | |
716 | *wakeup_fd = ret; | |
6548fca4 | 717 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
718 | return 0; |
719 | ||
720 | error: | |
57773204 MD |
721 | return ret; |
722 | } | |
32ce8569 MD |
723 | |
724 | /* | |
725 | * Returns 0 on success, negative error value on error. | |
726 | */ | |
727 | int ustcomm_send_reg_msg(int sock, | |
728 | enum ustctl_socket_type type, | |
729 | uint32_t bits_per_long, | |
730 | uint32_t uint8_t_alignment, | |
731 | uint32_t uint16_t_alignment, | |
732 | uint32_t uint32_t_alignment, | |
733 | uint32_t uint64_t_alignment, | |
734 | uint32_t long_alignment) | |
735 | { | |
736 | ssize_t len; | |
737 | struct ustctl_reg_msg reg_msg; | |
738 | ||
739 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
740 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
741 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
742 | reg_msg.pid = getpid(); | |
743 | reg_msg.ppid = getppid(); | |
744 | reg_msg.uid = getuid(); | |
745 | reg_msg.gid = getgid(); | |
746 | reg_msg.bits_per_long = bits_per_long; | |
747 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
748 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
749 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
750 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
751 | reg_msg.long_alignment = long_alignment; | |
752 | reg_msg.socket_type = type; | |
753 | lttng_ust_getprocname(reg_msg.name); | |
754 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); | |
755 | ||
756 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
757 | if (len > 0 && len != sizeof(reg_msg)) | |
758 | return -EIO; | |
759 | if (len < 0) | |
760 | return len; | |
761 | return 0; | |
762 | } | |
763 | ||
53569322 MD |
764 | static |
765 | ssize_t count_one_type(const struct lttng_type *lt) | |
766 | { | |
767 | switch (lt->atype) { | |
768 | case atype_integer: | |
769 | case atype_float: | |
770 | case atype_string: | |
771 | case atype_enum: | |
772 | case atype_array: | |
773 | case atype_sequence: | |
774 | return 1; | |
775 | case atype_struct: | |
776 | //TODO: implement non-empty struct. | |
777 | return 1; | |
778 | case atype_dynamic: | |
779 | { | |
780 | const struct lttng_event_field *choices; | |
781 | size_t nr_choices; | |
782 | int ret; | |
783 | ||
784 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
785 | &choices); | |
786 | if (ret) | |
787 | return ret; | |
788 | /* | |
789 | * One field for enum, one field for variant, and | |
790 | * one field per choice. | |
791 | */ | |
792 | return count_fields_recursive(nr_choices, choices) + 2; | |
793 | } | |
794 | default: | |
795 | return -EINVAL; | |
796 | } | |
797 | return 0; | |
798 | } | |
799 | ||
800 | static | |
801 | ssize_t count_fields_recursive(size_t nr_fields, | |
802 | const struct lttng_event_field *lttng_fields) | |
803 | { | |
804 | int i; | |
805 | ssize_t ret, count = 0; | |
806 | ||
807 | for (i = 0; i < nr_fields; i++) { | |
808 | const struct lttng_event_field *lf; | |
809 | ||
810 | lf = <tng_fields[i]; | |
811 | /* skip 'nowrite' fields */ | |
812 | if (lf->nowrite) | |
813 | continue; | |
814 | ret = count_one_type(&lf->type); | |
815 | if (ret < 0) | |
816 | return ret; /* error */ | |
817 | count += ret; | |
818 | } | |
819 | return count; | |
820 | } | |
821 | ||
822 | static | |
823 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
824 | const struct lttng_ctx_field *lttng_fields) | |
825 | { | |
826 | int i; | |
827 | ssize_t ret, count = 0; | |
828 | ||
829 | for (i = 0; i < nr_fields; i++) { | |
830 | const struct lttng_event_field *lf; | |
831 | ||
832 | lf = <tng_fields[i].event_field; | |
833 | /* skip 'nowrite' fields */ | |
834 | if (lf->nowrite) | |
835 | continue; | |
836 | ret = count_one_type(&lf->type); | |
837 | if (ret < 0) | |
838 | return ret; /* error */ | |
839 | count += ret; | |
840 | } | |
841 | return count; | |
842 | } | |
843 | ||
7f2348b8 | 844 | static |
735ea6a8 | 845 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
846 | enum lttng_string_encodings le) |
847 | { | |
848 | switch (le) { | |
849 | case lttng_encode_none: | |
850 | *ue = ustctl_encode_none; | |
851 | break; | |
852 | case lttng_encode_UTF8: | |
853 | *ue = ustctl_encode_UTF8; | |
854 | break; | |
855 | case lttng_encode_ASCII: | |
856 | *ue = ustctl_encode_ASCII; | |
857 | break; | |
858 | default: | |
859 | return -EINVAL; | |
860 | } | |
861 | return 0; | |
862 | } | |
863 | ||
32ce8569 | 864 | static |
c785c634 MD |
865 | int serialize_integer_type(struct ustctl_integer_type *uit, |
866 | const struct lttng_integer_type *lit) | |
867 | { | |
973eac63 GAPG |
868 | int32_t encoding; |
869 | ||
c785c634 MD |
870 | uit->size = lit->size; |
871 | uit->signedness = lit->signedness; | |
872 | uit->reverse_byte_order = lit->reverse_byte_order; | |
873 | uit->base = lit->base; | |
973eac63 | 874 | if (serialize_string_encoding(&encoding, lit->encoding)) |
c785c634 | 875 | return -EINVAL; |
973eac63 | 876 | uit->encoding = encoding; |
c785c634 MD |
877 | uit->alignment = lit->alignment; |
878 | return 0; | |
879 | } | |
880 | ||
881 | static | |
882 | int serialize_basic_type(struct lttng_session *session, | |
883 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 884 | enum lttng_abstract_types atype, |
32ce8569 MD |
885 | union _ustctl_basic_type *ubt, |
886 | const union _lttng_basic_type *lbt) | |
887 | { | |
888 | switch (atype) { | |
889 | case atype_integer: | |
890 | { | |
c785c634 | 891 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 892 | return -EINVAL; |
2b213b16 | 893 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
894 | break; |
895 | } | |
896 | case atype_string: | |
897 | { | |
973eac63 GAPG |
898 | int32_t encoding; |
899 | ||
900 | if (serialize_string_encoding(&encoding, lbt->string.encoding)) | |
7f2348b8 | 901 | return -EINVAL; |
973eac63 | 902 | ubt->string.encoding = encoding; |
2b213b16 | 903 | *uatype = ustctl_atype_string; |
32ce8569 MD |
904 | break; |
905 | } | |
906 | case atype_float: | |
907 | { | |
908 | struct ustctl_float_type *uft; | |
909 | const struct lttng_float_type *lft; | |
910 | ||
911 | uft = &ubt->_float; | |
912 | lft = &lbt->_float; | |
913 | uft->exp_dig = lft->exp_dig; | |
914 | uft->mant_dig = lft->mant_dig; | |
915 | uft->alignment = lft->alignment; | |
916 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 917 | *uatype = ustctl_atype_float; |
32ce8569 MD |
918 | break; |
919 | } | |
920 | case atype_enum: | |
c785c634 MD |
921 | { |
922 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
923 | LTTNG_UST_SYM_NAME_LEN); | |
924 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
925 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
926 | &lbt->enumeration.container_type)) | |
927 | return -EINVAL; | |
928 | if (session) { | |
929 | const struct lttng_enum *_enum; | |
930 | ||
b33b46f7 | 931 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
932 | if (!_enum) |
933 | return -EINVAL; | |
934 | ubt->enumeration.id = _enum->id; | |
935 | } else { | |
936 | ubt->enumeration.id = -1ULL; | |
937 | } | |
938 | *uatype = ustctl_atype_enum; | |
939 | break; | |
940 | } | |
32ce8569 MD |
941 | case atype_array: |
942 | case atype_sequence: | |
943 | default: | |
944 | return -EINVAL; | |
945 | } | |
946 | return 0; | |
32ce8569 MD |
947 | } |
948 | ||
949 | static | |
53569322 MD |
950 | int serialize_dynamic_type(struct lttng_session *session, |
951 | struct ustctl_field *fields, size_t *iter_output, | |
952 | const struct lttng_event_field *lf) | |
32ce8569 | 953 | { |
53569322 MD |
954 | const struct lttng_event_field *choices; |
955 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
956 | const struct lttng_type *tag_type; | |
957 | const struct lttng_event_field *tag_field_generic; | |
958 | struct lttng_event_field tag_field = { | |
959 | .name = tag_field_name, | |
960 | .nowrite = 0, | |
961 | }; | |
962 | struct ustctl_field *uf; | |
963 | size_t nr_choices, i; | |
32ce8569 MD |
964 | int ret; |
965 | ||
53569322 MD |
966 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
967 | tag_type = &tag_field_generic->type; | |
968 | ||
969 | /* Serialize enum field. */ | |
970 | strncpy(tag_field_name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
971 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
972 | strncat(tag_field_name, | |
973 | "_tag", | |
974 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
975 | tag_field.type = *tag_type; | |
976 | ret = serialize_one_field(session, fields, iter_output, | |
977 | &tag_field); | |
978 | if (ret) | |
979 | return ret; | |
980 | ||
981 | /* Serialize variant field. */ | |
982 | uf = &fields[*iter_output]; | |
983 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
984 | if (ret) | |
985 | return ret; | |
986 | ||
987 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
988 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
989 | uf->type.atype = ustctl_atype_variant; | |
990 | uf->type.u.variant.nr_choices = nr_choices; | |
991 | strncpy(uf->type.u.variant.tag_name, | |
992 | tag_field_name, | |
993 | LTTNG_UST_SYM_NAME_LEN); | |
994 | uf->type.u.variant.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
995 | (*iter_output)++; | |
996 | ||
997 | /* Serialize choice fields after variant. */ | |
998 | for (i = 0; i < nr_choices; i++) { | |
999 | ret = serialize_one_field(session, fields, | |
1000 | iter_output, &choices[i]); | |
1001 | if (ret) | |
1002 | return ret; | |
1003 | } | |
1004 | return 0; | |
1005 | } | |
1006 | ||
1007 | static | |
1008 | int serialize_one_field(struct lttng_session *session, | |
1009 | struct ustctl_field *fields, size_t *iter_output, | |
1010 | const struct lttng_event_field *lf) | |
1011 | { | |
1012 | const struct lttng_type *lt = &lf->type; | |
1013 | int ret; | |
1014 | ||
1015 | /* skip 'nowrite' fields */ | |
1016 | if (lf->nowrite) | |
1017 | return 0; | |
1018 | ||
32ce8569 MD |
1019 | switch (lt->atype) { |
1020 | case atype_integer: | |
1021 | case atype_float: | |
1022 | case atype_string: | |
c785c634 | 1023 | case atype_enum: |
53569322 MD |
1024 | { |
1025 | struct ustctl_field *uf = &fields[*iter_output]; | |
1026 | struct ustctl_type *ut = &uf->type; | |
973eac63 | 1027 | enum ustctl_abstract_types atype; |
53569322 MD |
1028 | |
1029 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1030 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
973eac63 | 1031 | ret = serialize_basic_type(session, &atype, lt->atype, |
32ce8569 MD |
1032 | &ut->u.basic, <->u.basic); |
1033 | if (ret) | |
1034 | return ret; | |
973eac63 | 1035 | ut->atype = atype; |
53569322 | 1036 | (*iter_output)++; |
32ce8569 | 1037 | break; |
53569322 | 1038 | } |
32ce8569 MD |
1039 | case atype_array: |
1040 | { | |
53569322 MD |
1041 | struct ustctl_field *uf = &fields[*iter_output]; |
1042 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1043 | struct ustctl_basic_type *ubt; |
1044 | const struct lttng_basic_type *lbt; | |
973eac63 | 1045 | enum ustctl_abstract_types atype; |
32ce8569 | 1046 | |
53569322 MD |
1047 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1048 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1049 | uf->type.atype = ustctl_atype_array; | |
32ce8569 MD |
1050 | ubt = &ut->u.array.elem_type; |
1051 | lbt = <->u.array.elem_type; | |
1052 | ut->u.array.length = lt->u.array.length; | |
973eac63 | 1053 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1054 | &ubt->u.basic, &lbt->u.basic); |
1055 | if (ret) | |
1056 | return -EINVAL; | |
973eac63 | 1057 | ubt->atype = atype; |
2b213b16 | 1058 | ut->atype = ustctl_atype_array; |
53569322 | 1059 | (*iter_output)++; |
32ce8569 MD |
1060 | break; |
1061 | } | |
1062 | case atype_sequence: | |
1063 | { | |
53569322 MD |
1064 | struct ustctl_field *uf = &fields[*iter_output]; |
1065 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1066 | struct ustctl_basic_type *ubt; |
1067 | const struct lttng_basic_type *lbt; | |
973eac63 | 1068 | enum ustctl_abstract_types atype; |
32ce8569 MD |
1069 | int ret; |
1070 | ||
53569322 MD |
1071 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1072 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1073 | uf->type.atype = ustctl_atype_sequence; | |
32ce8569 MD |
1074 | ubt = &ut->u.sequence.length_type; |
1075 | lbt = <->u.sequence.length_type; | |
973eac63 | 1076 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1077 | &ubt->u.basic, &lbt->u.basic); |
1078 | if (ret) | |
1079 | return -EINVAL; | |
973eac63 | 1080 | ubt->atype = atype; |
32ce8569 MD |
1081 | ubt = &ut->u.sequence.elem_type; |
1082 | lbt = <->u.sequence.elem_type; | |
973eac63 | 1083 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1084 | &ubt->u.basic, &lbt->u.basic); |
1085 | if (ret) | |
1086 | return -EINVAL; | |
973eac63 | 1087 | ubt->atype = atype; |
2b213b16 | 1088 | ut->atype = ustctl_atype_sequence; |
53569322 MD |
1089 | (*iter_output)++; |
1090 | break; | |
1091 | } | |
1092 | case atype_dynamic: | |
1093 | { | |
1094 | ret = serialize_dynamic_type(session, fields, iter_output, lf); | |
1095 | if (ret) | |
1096 | return -EINVAL; | |
1097 | break; | |
1098 | } | |
1099 | case atype_struct: | |
1100 | { | |
1101 | struct ustctl_field *uf = &fields[*iter_output]; | |
1102 | ||
1103 | /* | |
1104 | * TODO: add support for non-empty struct. | |
1105 | */ | |
1106 | if (lf->type.u._struct.nr_fields != 0) { | |
1107 | return -EINVAL; | |
1108 | } | |
1109 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1110 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1111 | uf->type.atype = ustctl_atype_struct; | |
1112 | uf->type.u._struct.nr_fields = 0; | |
1113 | (*iter_output)++; | |
32ce8569 MD |
1114 | break; |
1115 | } | |
32ce8569 MD |
1116 | default: |
1117 | return -EINVAL; | |
1118 | } | |
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static | |
c785c634 MD |
1123 | int serialize_fields(struct lttng_session *session, |
1124 | size_t *_nr_write_fields, | |
32ce8569 MD |
1125 | struct ustctl_field **ustctl_fields, |
1126 | size_t nr_fields, | |
1127 | const struct lttng_event_field *lttng_fields) | |
1128 | { | |
1129 | struct ustctl_field *fields; | |
53569322 MD |
1130 | int ret; |
1131 | size_t i, iter_output = 0; | |
1132 | ssize_t nr_write_fields; | |
1133 | ||
1134 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1135 | if (nr_write_fields < 0) { | |
1136 | return (int) nr_write_fields; | |
1137 | } | |
32ce8569 | 1138 | |
53569322 | 1139 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1140 | if (!fields) |
1141 | return -ENOMEM; | |
1142 | ||
1143 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1144 | ret = serialize_one_field(session, fields, &iter_output, |
1145 | <tng_fields[i]); | |
32ce8569 MD |
1146 | if (ret) |
1147 | goto error_type; | |
32ce8569 MD |
1148 | } |
1149 | ||
1150 | *_nr_write_fields = nr_write_fields; | |
1151 | *ustctl_fields = fields; | |
1152 | return 0; | |
1153 | ||
1154 | error_type: | |
1155 | free(fields); | |
1156 | return ret; | |
1157 | } | |
1158 | ||
c785c634 MD |
1159 | static |
1160 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1161 | size_t nr_entries, | |
1162 | const struct lttng_enum_entry *lttng_entries) | |
1163 | { | |
1164 | struct ustctl_enum_entry *entries; | |
1165 | int i; | |
1166 | ||
1167 | /* Serialize the entries */ | |
1168 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1169 | if (!entries) | |
1170 | return -ENOMEM; | |
1171 | for (i = 0; i < nr_entries; i++) { | |
1172 | struct ustctl_enum_entry *uentry; | |
1173 | const struct lttng_enum_entry *lentry; | |
1174 | ||
1175 | uentry = &entries[i]; | |
1176 | lentry = <tng_entries[i]; | |
1177 | ||
a6f80644 MD |
1178 | uentry->start.value = lentry->start.value; |
1179 | uentry->start.signedness = lentry->start.signedness; | |
1180 | uentry->end.value = lentry->end.value; | |
1181 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1182 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1183 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1184 | |
1185 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1186 | uentry->u.extra.options |= | |
1187 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1188 | } | |
c785c634 MD |
1189 | } |
1190 | *_entries = entries; | |
1191 | return 0; | |
1192 | } | |
1193 | ||
83e43212 | 1194 | static |
53569322 MD |
1195 | int serialize_ctx_fields(struct lttng_session *session, |
1196 | size_t *_nr_write_fields, | |
83e43212 MD |
1197 | struct ustctl_field **ustctl_fields, |
1198 | size_t nr_fields, | |
1199 | const struct lttng_ctx_field *lttng_fields) | |
1200 | { | |
1201 | struct ustctl_field *fields; | |
53569322 MD |
1202 | int ret; |
1203 | size_t i, iter_output = 0; | |
1204 | ssize_t nr_write_fields; | |
83e43212 | 1205 | |
53569322 MD |
1206 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1207 | lttng_fields); | |
1208 | if (nr_write_fields < 0) { | |
1209 | return (int) nr_write_fields; | |
1210 | } | |
1211 | ||
1212 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1213 | if (!fields) |
1214 | return -ENOMEM; | |
1215 | ||
1216 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1217 | ret = serialize_one_field(session, fields, &iter_output, |
1218 | <tng_fields[i].event_field); | |
83e43212 MD |
1219 | if (ret) |
1220 | goto error_type; | |
83e43212 MD |
1221 | } |
1222 | ||
1223 | *_nr_write_fields = nr_write_fields; | |
1224 | *ustctl_fields = fields; | |
1225 | return 0; | |
1226 | ||
1227 | error_type: | |
1228 | free(fields); | |
1229 | return ret; | |
1230 | } | |
1231 | ||
32ce8569 MD |
1232 | /* |
1233 | * Returns 0 on success, negative error value on error. | |
1234 | */ | |
1235 | int ustcomm_register_event(int sock, | |
c785c634 | 1236 | struct lttng_session *session, |
32ce8569 MD |
1237 | int session_objd, /* session descriptor */ |
1238 | int channel_objd, /* channel descriptor */ | |
1239 | const char *event_name, /* event name (input) */ | |
1240 | int loglevel, | |
1241 | const char *signature, /* event signature (input) */ | |
1242 | size_t nr_fields, /* fields */ | |
1243 | const struct lttng_event_field *lttng_fields, | |
1244 | const char *model_emf_uri, | |
1245 | uint32_t *id) /* event id (output) */ | |
1246 | { | |
1247 | ssize_t len; | |
1248 | struct { | |
1249 | struct ustcomm_notify_hdr header; | |
1250 | struct ustcomm_notify_event_msg m; | |
1251 | } msg; | |
1252 | struct { | |
1253 | struct ustcomm_notify_hdr header; | |
1254 | struct ustcomm_notify_event_reply r; | |
1255 | } reply; | |
1256 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1257 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1258 | size_t nr_write_fields = 0; |
1259 | int ret; | |
1260 | ||
1261 | memset(&msg, 0, sizeof(msg)); | |
1262 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1263 | msg.m.session_objd = session_objd; | |
1264 | msg.m.channel_objd = channel_objd; | |
1265 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1266 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1267 | msg.m.loglevel = loglevel; | |
1268 | signature_len = strlen(signature) + 1; | |
1269 | msg.m.signature_len = signature_len; | |
1270 | ||
1271 | /* Calculate fields len, serialize fields. */ | |
1272 | if (nr_fields > 0) { | |
c785c634 | 1273 | ret = serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1274 | nr_fields, lttng_fields); |
1275 | if (ret) | |
1276 | return ret; | |
1277 | } | |
1278 | ||
1279 | fields_len = sizeof(*fields) * nr_write_fields; | |
1280 | msg.m.fields_len = fields_len; | |
1281 | if (model_emf_uri) { | |
1282 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1283 | } else { | |
1284 | model_emf_uri_len = 0; | |
1285 | } | |
1286 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1287 | |
32ce8569 MD |
1288 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1289 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1290 | ret = -EIO; |
1291 | goto error_fields; | |
32ce8569 MD |
1292 | } |
1293 | if (len < 0) { | |
c785c634 MD |
1294 | ret = len; |
1295 | goto error_fields; | |
32ce8569 MD |
1296 | } |
1297 | ||
1298 | /* send signature */ | |
1299 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1300 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1301 | ret = -EIO; |
1302 | goto error_fields; | |
32ce8569 MD |
1303 | } |
1304 | if (len < 0) { | |
6b95617c MD |
1305 | ret = len; |
1306 | goto error_fields; | |
32ce8569 MD |
1307 | } |
1308 | ||
1309 | /* send fields */ | |
1310 | if (fields_len > 0) { | |
1311 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1312 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1313 | ret = -EIO; |
1314 | goto error_fields; | |
32ce8569 MD |
1315 | } |
1316 | if (len < 0) { | |
c785c634 MD |
1317 | ret = len; |
1318 | goto error_fields; | |
32ce8569 MD |
1319 | } |
1320 | } | |
6b95617c | 1321 | free(fields); |
32ce8569 MD |
1322 | |
1323 | if (model_emf_uri_len) { | |
1324 | /* send model_emf_uri */ | |
1325 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1326 | model_emf_uri_len); | |
c785c634 | 1327 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1328 | return -EIO; |
c785c634 MD |
1329 | } |
1330 | if (len < 0) { | |
6b95617c | 1331 | return len; |
c785c634 | 1332 | } |
32ce8569 MD |
1333 | } |
1334 | ||
1335 | /* receive reply */ | |
1336 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1337 | switch (len) { | |
1338 | case 0: /* orderly shutdown */ | |
1339 | return -EPIPE; | |
1340 | case sizeof(reply): | |
1341 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1342 | ERR("Unexpected result message command " | |
1343 | "expected: %u vs received: %u\n", | |
1344 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1345 | return -EINVAL; | |
1346 | } | |
1347 | if (reply.r.ret_code > 0) | |
1348 | return -EINVAL; | |
1349 | if (reply.r.ret_code < 0) | |
1350 | return reply.r.ret_code; | |
1351 | *id = reply.r.event_id; | |
1352 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1353 | event_name, reply.r.ret_code, reply.r.event_id); | |
1354 | return 0; | |
1355 | default: | |
1356 | if (len < 0) { | |
1357 | /* Transport level error */ | |
1358 | if (errno == EPIPE || errno == ECONNRESET) | |
1359 | len = -errno; | |
1360 | return len; | |
1361 | } else { | |
1362 | ERR("incorrect message size: %zd\n", len); | |
1363 | return len; | |
1364 | } | |
1365 | } | |
6b95617c | 1366 | /* Unreached. */ |
c785c634 | 1367 | |
6b95617c | 1368 | /* Error path only. */ |
c785c634 MD |
1369 | error_fields: |
1370 | free(fields); | |
1371 | return ret; | |
1372 | } | |
1373 | ||
1374 | /* | |
1375 | * Returns 0 on success, negative error value on error. | |
1376 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1377 | */ | |
1378 | int ustcomm_register_enum(int sock, | |
1379 | int session_objd, /* session descriptor */ | |
1380 | const char *enum_name, /* enum name (input) */ | |
1381 | size_t nr_entries, /* entries */ | |
1382 | const struct lttng_enum_entry *lttng_entries, | |
1383 | uint64_t *id) | |
1384 | { | |
1385 | ssize_t len; | |
1386 | struct { | |
1387 | struct ustcomm_notify_hdr header; | |
1388 | struct ustcomm_notify_enum_msg m; | |
1389 | } msg; | |
1390 | struct { | |
1391 | struct ustcomm_notify_hdr header; | |
1392 | struct ustcomm_notify_enum_reply r; | |
1393 | } reply; | |
1394 | size_t entries_len; | |
1395 | struct ustctl_enum_entry *entries = NULL; | |
1396 | int ret; | |
1397 | ||
1398 | memset(&msg, 0, sizeof(msg)); | |
1399 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1400 | msg.m.session_objd = session_objd; | |
1401 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1402 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1403 | ||
1404 | /* Calculate entries len, serialize entries. */ | |
1405 | if (nr_entries > 0) { | |
1406 | ret = serialize_entries(&entries, | |
1407 | nr_entries, lttng_entries); | |
1408 | if (ret) | |
1409 | return ret; | |
1410 | } | |
1411 | ||
1412 | entries_len = sizeof(*entries) * nr_entries; | |
1413 | msg.m.entries_len = entries_len; | |
1414 | ||
1415 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1416 | if (len > 0 && len != sizeof(msg)) { | |
1417 | ret = -EIO; | |
1418 | goto error_entries; | |
1419 | } | |
1420 | if (len < 0) { | |
1421 | ret = len; | |
1422 | goto error_entries; | |
1423 | } | |
1424 | ||
1425 | /* send entries */ | |
1426 | if (entries_len > 0) { | |
1427 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1428 | if (len > 0 && len != entries_len) { | |
1429 | ret = -EIO; | |
1430 | goto error_entries; | |
1431 | } | |
1432 | if (len < 0) { | |
1433 | ret = len; | |
1434 | goto error_entries; | |
1435 | } | |
1436 | } | |
1437 | free(entries); | |
1438 | entries = NULL; | |
1439 | ||
1440 | /* receive reply */ | |
1441 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1442 | switch (len) { | |
1443 | case 0: /* orderly shutdown */ | |
1444 | return -EPIPE; | |
1445 | case sizeof(reply): | |
1446 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1447 | ERR("Unexpected result message command " | |
1448 | "expected: %u vs received: %u\n", | |
1449 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1450 | return -EINVAL; | |
1451 | } | |
1452 | if (reply.r.ret_code > 0) | |
1453 | return -EINVAL; | |
1454 | if (reply.r.ret_code < 0) | |
1455 | return reply.r.ret_code; | |
1456 | *id = reply.r.enum_id; | |
1457 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1458 | enum_name, reply.r.ret_code); | |
1459 | return 0; | |
1460 | default: | |
1461 | if (len < 0) { | |
1462 | /* Transport level error */ | |
1463 | if (errno == EPIPE || errno == ECONNRESET) | |
1464 | len = -errno; | |
1465 | return len; | |
1466 | } else { | |
1467 | ERR("incorrect message size: %zd\n", len); | |
1468 | return len; | |
1469 | } | |
1470 | } | |
1471 | return ret; | |
1472 | ||
1473 | error_entries: | |
1474 | free(entries); | |
1475 | return ret; | |
32ce8569 MD |
1476 | } |
1477 | ||
1478 | /* | |
1479 | * Returns 0 on success, negative error value on error. | |
1480 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1481 | */ | |
1482 | int ustcomm_register_channel(int sock, | |
53569322 | 1483 | struct lttng_session *session, |
32ce8569 MD |
1484 | int session_objd, /* session descriptor */ |
1485 | int channel_objd, /* channel descriptor */ | |
1486 | size_t nr_ctx_fields, | |
83e43212 | 1487 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1488 | uint32_t *chan_id, /* channel id (output) */ |
1489 | int *header_type) /* header type (output) */ | |
1490 | { | |
1491 | ssize_t len; | |
1492 | struct { | |
1493 | struct ustcomm_notify_hdr header; | |
1494 | struct ustcomm_notify_channel_msg m; | |
1495 | } msg; | |
1496 | struct { | |
1497 | struct ustcomm_notify_hdr header; | |
1498 | struct ustcomm_notify_channel_reply r; | |
1499 | } reply; | |
1500 | size_t fields_len; | |
83e43212 | 1501 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1502 | int ret; |
1503 | size_t nr_write_fields = 0; | |
1504 | ||
1505 | memset(&msg, 0, sizeof(msg)); | |
1506 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1507 | msg.m.session_objd = session_objd; | |
1508 | msg.m.channel_objd = channel_objd; | |
1509 | ||
1510 | /* Calculate fields len, serialize fields. */ | |
1511 | if (nr_ctx_fields > 0) { | |
53569322 | 1512 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1513 | nr_ctx_fields, ctx_fields); |
1514 | if (ret) | |
1515 | return ret; | |
1516 | } | |
1517 | ||
1518 | fields_len = sizeof(*fields) * nr_write_fields; | |
1519 | msg.m.ctx_fields_len = fields_len; | |
1520 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1521 | if (len > 0 && len != sizeof(msg)) { | |
1522 | free(fields); | |
1523 | return -EIO; | |
1524 | } | |
1525 | if (len < 0) { | |
1526 | free(fields); | |
1527 | return len; | |
1528 | } | |
1529 | ||
1530 | /* send fields */ | |
1531 | if (fields_len > 0) { | |
1532 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1533 | free(fields); | |
1534 | if (len > 0 && len != fields_len) { | |
1535 | return -EIO; | |
1536 | } | |
1537 | if (len < 0) { | |
1538 | return len; | |
1539 | } | |
17ea789c MD |
1540 | } else { |
1541 | free(fields); | |
32ce8569 MD |
1542 | } |
1543 | ||
1544 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1545 | switch (len) { | |
1546 | case 0: /* orderly shutdown */ | |
1547 | return -EPIPE; | |
1548 | case sizeof(reply): | |
1549 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1550 | ERR("Unexpected result message command " | |
1551 | "expected: %u vs received: %u\n", | |
1552 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1553 | return -EINVAL; | |
1554 | } | |
1555 | if (reply.r.ret_code > 0) | |
1556 | return -EINVAL; | |
1557 | if (reply.r.ret_code < 0) | |
1558 | return reply.r.ret_code; | |
1559 | *chan_id = reply.r.chan_id; | |
1560 | switch (reply.r.header_type) { | |
1561 | case 1: | |
1562 | case 2: | |
1563 | *header_type = reply.r.header_type; | |
1564 | break; | |
1565 | default: | |
1566 | ERR("Unexpected channel header type %u\n", | |
1567 | reply.r.header_type); | |
1568 | return -EINVAL; | |
1569 | } | |
1570 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1571 | reply.r.chan_id, reply.r.header_type); | |
1572 | return 0; | |
1573 | default: | |
1574 | if (len < 0) { | |
1575 | /* Transport level error */ | |
1576 | if (errno == EPIPE || errno == ECONNRESET) | |
1577 | len = -errno; | |
1578 | return len; | |
1579 | } else { | |
1580 | ERR("incorrect message size: %zd\n", len); | |
1581 | return len; | |
1582 | } | |
1583 | } | |
1584 | } | |
ff517991 MD |
1585 | |
1586 | /* | |
1587 | * Set socket reciving timeout. | |
1588 | */ | |
1589 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1590 | { | |
1591 | int ret; | |
1592 | struct timeval tv; | |
1593 | ||
1594 | tv.tv_sec = msec / 1000; | |
1595 | tv.tv_usec = (msec * 1000 % 1000000); | |
1596 | ||
1597 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1598 | if (ret < 0) { | |
1599 | PERROR("setsockopt SO_RCVTIMEO"); | |
1600 | ret = -errno; | |
1601 | } | |
1602 | ||
1603 | return ret; | |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * Set socket sending timeout. | |
1608 | */ | |
1609 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1610 | { | |
1611 | int ret; | |
1612 | struct timeval tv; | |
1613 | ||
1614 | tv.tv_sec = msec / 1000; | |
1615 | tv.tv_usec = (msec * 1000) % 1000000; | |
1616 | ||
1617 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1618 | if (ret < 0) { | |
1619 | PERROR("setsockopt SO_SNDTIMEO"); | |
1620 | ret = -errno; | |
1621 | } | |
1622 | ||
1623 | return ret; | |
1624 | } |