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> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <sys/socket.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/un.h> | |
29 | #include <unistd.h> | |
30 | #include <assert.h> | |
57773204 | 31 | #include <errno.h> |
11ba4bcb | 32 | #include <fcntl.h> |
67c5b804 | 33 | |
32ce8569 | 34 | #include <lttng/ust-ctl.h> |
b728d87e | 35 | #include <ust-comm.h> |
6548fca4 | 36 | #include <ust-fd.h> |
74d81a6c | 37 | #include <helper.h> |
7bc53e94 | 38 | #include <lttng/ust-error.h> |
32ce8569 | 39 | #include <lttng/ust-events.h> |
53569322 | 40 | #include <lttng/ust-dynamic-type.h> |
32ce8569 MD |
41 | #include <usterr-signal-safe.h> |
42 | ||
43 | #include "../liblttng-ust/compat.h" | |
7bc53e94 MD |
44 | |
45 | #define USTCOMM_CODE_OFFSET(code) \ | |
46 | (code == LTTNG_UST_OK ? 0 : (code - LTTNG_UST_ERR + 1)) | |
67c5b804 | 47 | |
74d81a6c MD |
48 | #define USTCOMM_MAX_SEND_FDS 4 |
49 | ||
53569322 MD |
50 | static |
51 | ssize_t count_fields_recursive(size_t nr_fields, | |
52 | const struct lttng_event_field *lttng_fields); | |
53 | static | |
54 | int serialize_one_field(struct lttng_session *session, | |
55 | struct ustctl_field *fields, size_t *iter_output, | |
56 | const struct lttng_event_field *lf); | |
57 | ||
67c5b804 MD |
58 | /* |
59 | * Human readable error message. | |
60 | */ | |
57773204 | 61 | static const char *ustcomm_readable_code[] = { |
7bc53e94 MD |
62 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_OK) ] = "Success", |
63 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR) ] = "Unknown error", | |
64 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOENT) ] = "No entry", | |
64b2564e DG |
65 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXIST) ] = "Object already exists", |
66 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL) ] = "Invalid argument", | |
67 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PERM) ] = "Permission denied", | |
68 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOSYS) ] = "Not implemented", | |
74d81a6c | 69 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXITING) ] = "Process is exiting", |
32ce8569 MD |
70 | |
71 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_MAGIC) ] = "Invalid magic number", | |
72 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_SOCKET_TYPE) ] = "Invalid socket type", | |
73 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_UNSUP_MAJOR) ] = "Unsupported major version", | |
4a07ff75 MD |
74 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PEERCRED) ] = "Cannot get unix socket peer credentials", |
75 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PEERCRED_PID) ] = "Peer credentials PID is invalid. Socket appears to belong to a distinct, non-nested pid namespace.", | |
67c5b804 MD |
76 | }; |
77 | ||
78 | /* | |
7bc53e94 | 79 | * lttng_ust_strerror |
67c5b804 | 80 | * |
7bc53e94 MD |
81 | * Receives positive error value. |
82 | * Return ptr to string representing a human readable | |
83 | * error code from the ustcomm_return_code enum. | |
67c5b804 | 84 | */ |
7bc53e94 | 85 | const char *lttng_ust_strerror(int code) |
67c5b804 | 86 | { |
7bc53e94 MD |
87 | if (code == LTTNG_UST_OK) |
88 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
89 | if (code < LTTNG_UST_ERR) | |
90 | return strerror(code); | |
91 | if (code >= LTTNG_UST_ERR_NR) | |
92 | code = LTTNG_UST_ERR; | |
93 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
67c5b804 MD |
94 | } |
95 | ||
96 | /* | |
74d81a6c | 97 | * ustcomm_connect_unix_sock |
67c5b804 | 98 | * |
74d81a6c | 99 | * Connect to unix socket using the path name. |
6548fca4 MD |
100 | * |
101 | * Caller handles FD tracker. | |
67c5b804 | 102 | */ |
451d66b2 | 103 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
104 | { |
105 | struct sockaddr_un sun; | |
7bc53e94 | 106 | int fd, ret; |
67c5b804 | 107 | |
204d45df MD |
108 | /* |
109 | * libust threads require the close-on-exec flag for all | |
110 | * resources so it does not leak file descriptors upon exec. | |
18ef3e51 | 111 | * SOCK_CLOEXEC is not used since it is linux specific. |
204d45df | 112 | */ |
11ba4bcb | 113 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
67c5b804 | 114 | if (fd < 0) { |
32ce8569 | 115 | PERROR("socket"); |
7bc53e94 | 116 | ret = -errno; |
67c5b804 MD |
117 | goto error; |
118 | } | |
451d66b2 MD |
119 | if (timeout >= 0) { |
120 | /* Give at least 10ms. */ | |
121 | if (timeout < 10) | |
122 | timeout = 10; | |
123 | ret = ustcomm_setsockopt_snd_timeout(fd, timeout); | |
124 | if (ret < 0) { | |
125 | WARN("Error setting connect socket send timeout"); | |
126 | } | |
127 | } | |
11ba4bcb MD |
128 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); |
129 | if (ret < 0) { | |
32ce8569 | 130 | PERROR("fcntl"); |
7bc53e94 | 131 | ret = -errno; |
11ba4bcb MD |
132 | goto error_fcntl; |
133 | } | |
67c5b804 MD |
134 | |
135 | memset(&sun, 0, sizeof(sun)); | |
136 | sun.sun_family = AF_UNIX; | |
137 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
138 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
139 | ||
140 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
141 | if (ret < 0) { | |
142 | /* | |
0b9aa170 MD |
143 | * Don't print message on connect ENOENT error, because |
144 | * connect is used in normal execution to detect if | |
145 | * sessiond is alive. ENOENT is when the unix socket | |
146 | * file does not exist, and ECONNREFUSED is when the | |
147 | * file exists but no sessiond is listening. | |
67c5b804 | 148 | */ |
0b9aa170 | 149 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 150 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 151 | PERROR("connect"); |
7bc53e94 | 152 | ret = -errno; |
8cf811d3 MD |
153 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
154 | ret = -EPIPE; | |
67c5b804 MD |
155 | goto error_connect; |
156 | } | |
157 | ||
158 | return fd; | |
159 | ||
160 | error_connect: | |
11ba4bcb | 161 | error_fcntl: |
7bc53e94 MD |
162 | { |
163 | int closeret; | |
164 | ||
165 | closeret = close(fd); | |
166 | if (closeret) | |
32ce8569 | 167 | PERROR("close"); |
7bc53e94 | 168 | } |
67c5b804 MD |
169 | error: |
170 | return ret; | |
171 | } | |
172 | ||
173 | /* | |
74d81a6c | 174 | * ustcomm_accept_unix_sock |
67c5b804 | 175 | * |
74d81a6c MD |
176 | * Do an accept(2) on the sock and return the |
177 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 178 | */ |
57773204 | 179 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
180 | { |
181 | int new_fd; | |
182 | struct sockaddr_un sun; | |
183 | socklen_t len = 0; | |
184 | ||
185 | /* Blocking call */ | |
186 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
187 | if (new_fd < 0) { | |
b869b5ae MD |
188 | if (errno != ECONNABORTED) |
189 | PERROR("accept"); | |
190 | new_fd = -errno; | |
191 | if (new_fd == -ECONNABORTED) | |
192 | new_fd = -EPIPE; | |
67c5b804 | 193 | } |
67c5b804 | 194 | return new_fd; |
67c5b804 MD |
195 | } |
196 | ||
197 | /* | |
74d81a6c | 198 | * ustcomm_create_unix_sock |
67c5b804 | 199 | * |
74d81a6c MD |
200 | * Creates a AF_UNIX local socket using pathname |
201 | * bind the socket upon creation and return the fd. | |
67c5b804 | 202 | */ |
57773204 | 203 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
204 | { |
205 | struct sockaddr_un sun; | |
7bc53e94 | 206 | int fd, ret; |
67c5b804 MD |
207 | |
208 | /* Create server socket */ | |
209 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 210 | PERROR("socket"); |
7bc53e94 | 211 | ret = -errno; |
67c5b804 MD |
212 | goto error; |
213 | } | |
214 | ||
215 | memset(&sun, 0, sizeof(sun)); | |
216 | sun.sun_family = AF_UNIX; | |
217 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
218 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
219 | ||
220 | /* Unlink the old file if present */ | |
221 | (void) unlink(pathname); | |
222 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
223 | if (ret < 0) { | |
32ce8569 | 224 | PERROR("bind"); |
7bc53e94 MD |
225 | ret = -errno; |
226 | goto error_close; | |
67c5b804 MD |
227 | } |
228 | ||
229 | return fd; | |
230 | ||
7bc53e94 MD |
231 | error_close: |
232 | { | |
233 | int closeret; | |
234 | ||
235 | closeret = close(fd); | |
236 | if (closeret) { | |
32ce8569 | 237 | PERROR("close"); |
7bc53e94 MD |
238 | } |
239 | } | |
67c5b804 MD |
240 | error: |
241 | return ret; | |
242 | } | |
243 | ||
244 | /* | |
74d81a6c | 245 | * ustcomm_listen_unix_sock |
67c5b804 | 246 | * |
74d81a6c | 247 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 248 | */ |
57773204 | 249 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
250 | { |
251 | int ret; | |
252 | ||
e41474be | 253 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 254 | if (ret < 0) { |
7bc53e94 | 255 | ret = -errno; |
32ce8569 | 256 | PERROR("listen"); |
67c5b804 MD |
257 | } |
258 | ||
259 | return ret; | |
260 | } | |
261 | ||
262 | /* | |
74d81a6c MD |
263 | * ustcomm_close_unix_sock |
264 | * | |
265 | * Shutdown cleanly a unix socket. | |
6548fca4 MD |
266 | * |
267 | * Handles fd tracker internally. | |
74d81a6c MD |
268 | */ |
269 | int ustcomm_close_unix_sock(int sock) | |
270 | { | |
271 | int ret; | |
272 | ||
6548fca4 | 273 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 274 | ret = close(sock); |
6548fca4 MD |
275 | if (!ret) { |
276 | lttng_ust_delete_fd_from_tracker(sock); | |
277 | } else { | |
32ce8569 | 278 | PERROR("close"); |
74d81a6c MD |
279 | ret = -errno; |
280 | } | |
6548fca4 | 281 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
282 | |
283 | return ret; | |
284 | } | |
285 | ||
286 | /* | |
287 | * ustcomm_recv_unix_sock | |
67c5b804 | 288 | * |
74d81a6c MD |
289 | * Receive data of size len in put that data into |
290 | * the buf param. Using recvmsg API. | |
291 | * Return the size of received data. | |
292 | * Return 0 on orderly shutdown. | |
67c5b804 | 293 | */ |
57773204 | 294 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 295 | { |
913b87f1 | 296 | struct msghdr msg; |
67c5b804 | 297 | struct iovec iov[1]; |
89c5b6ec MD |
298 | ssize_t ret = -1; |
299 | size_t len_last; | |
67c5b804 | 300 | |
913b87f1 MD |
301 | memset(&msg, 0, sizeof(msg)); |
302 | ||
67c5b804 MD |
303 | iov[0].iov_base = buf; |
304 | iov[0].iov_len = len; | |
305 | msg.msg_iov = iov; | |
306 | msg.msg_iovlen = 1; | |
307 | ||
7e3cfcbe | 308 | do { |
89c5b6ec | 309 | len_last = iov[0].iov_len; |
7e3cfcbe | 310 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
311 | if (ret > 0) { |
312 | iov[0].iov_base += ret; | |
313 | iov[0].iov_len -= ret; | |
314 | assert(ret <= len_last); | |
315 | } | |
316 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
317 | |
318 | if (ret < 0) { | |
319 | int shutret; | |
320 | ||
8cf811d3 | 321 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 322 | PERROR("recvmsg"); |
7bc53e94 | 323 | ret = -errno; |
8cf811d3 | 324 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 325 | ret = -EPIPE; |
7bc53e94 MD |
326 | |
327 | shutret = shutdown(sock, SHUT_RDWR); | |
328 | if (shutret) | |
32ce8569 | 329 | ERR("Socket shutdown error"); |
89c5b6ec MD |
330 | } else if (ret > 0) { |
331 | ret = len; | |
67c5b804 | 332 | } |
89c5b6ec | 333 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
334 | |
335 | return ret; | |
336 | } | |
337 | ||
338 | /* | |
74d81a6c | 339 | * ustcomm_send_unix_sock |
67c5b804 | 340 | * |
74d81a6c MD |
341 | * Send buf data of size len. Using sendmsg API. |
342 | * Return the size of sent data. | |
67c5b804 | 343 | */ |
32ce8569 | 344 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 345 | { |
913b87f1 | 346 | struct msghdr msg; |
67c5b804 | 347 | struct iovec iov[1]; |
7bc53e94 | 348 | ssize_t ret; |
67c5b804 | 349 | |
913b87f1 MD |
350 | memset(&msg, 0, sizeof(msg)); |
351 | ||
32ce8569 | 352 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
353 | iov[0].iov_len = len; |
354 | msg.msg_iov = iov; | |
355 | msg.msg_iovlen = 1; | |
356 | ||
1ea11eab MD |
357 | /* |
358 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
359 | * libust, so libust does not receive an unhandled SIGPIPE or | |
360 | * SIGURG. The sessiond receiver side can be made more resilient | |
361 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
362 | * libust side. | |
363 | */ | |
51d9d699 MD |
364 | do { |
365 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
366 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
367 | |
368 | if (ret < 0) { | |
369 | int shutret; | |
370 | ||
74d81a6c | 371 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 372 | PERROR("sendmsg"); |
7bc53e94 | 373 | ret = -errno; |
b869b5ae MD |
374 | if (ret == -ECONNRESET) |
375 | ret = -EPIPE; | |
7bc53e94 MD |
376 | |
377 | shutret = shutdown(sock, SHUT_RDWR); | |
378 | if (shutret) | |
32ce8569 | 379 | ERR("Socket shutdown error"); |
67c5b804 MD |
380 | } |
381 | ||
382 | return ret; | |
383 | } | |
384 | ||
385 | /* | |
74d81a6c | 386 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 387 | * |
74d81a6c | 388 | * Returns the size of data sent, or negative error value. |
67c5b804 | 389 | */ |
74d81a6c | 390 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 391 | { |
913b87f1 | 392 | struct msghdr msg; |
67c5b804 MD |
393 | struct cmsghdr *cmptr; |
394 | struct iovec iov[1]; | |
395 | ssize_t ret = -1; | |
396 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
397 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 398 | char dummy = 0; |
67c5b804 | 399 | |
913b87f1 | 400 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 401 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 402 | |
74d81a6c MD |
403 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
404 | return -EINVAL; | |
67c5b804 MD |
405 | |
406 | msg.msg_control = (caddr_t)tmp; | |
407 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
408 | ||
409 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
410 | if (!cmptr) |
411 | return -EINVAL; | |
67c5b804 MD |
412 | cmptr->cmsg_level = SOL_SOCKET; |
413 | cmptr->cmsg_type = SCM_RIGHTS; | |
414 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
415 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
416 | /* Sum of the length of all control messages in the buffer: */ | |
417 | msg.msg_controllen = cmptr->cmsg_len; | |
418 | ||
74d81a6c MD |
419 | iov[0].iov_base = &dummy; |
420 | iov[0].iov_len = 1; | |
67c5b804 MD |
421 | msg.msg_iov = iov; |
422 | msg.msg_iovlen = 1; | |
423 | ||
51d9d699 | 424 | do { |
0dafcd63 | 425 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 426 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 427 | if (ret < 0) { |
74d81a6c MD |
428 | /* |
429 | * We consider EPIPE and ECONNRESET as expected. | |
430 | */ | |
431 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 432 | PERROR("sendmsg"); |
74d81a6c | 433 | } |
b869b5ae MD |
434 | ret = -errno; |
435 | if (ret == -ECONNRESET) | |
436 | ret = -EPIPE; | |
74d81a6c MD |
437 | } |
438 | return ret; | |
439 | } | |
7bc53e94 | 440 | |
74d81a6c MD |
441 | /* |
442 | * Recv a message accompanied by fd(s) from a unix socket. | |
443 | * | |
74d81a6c MD |
444 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
445 | * actually received in nb_fd. | |
446 | * Returns -EPIPE on orderly shutdown. | |
447 | */ | |
448 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
449 | { | |
450 | struct iovec iov[1]; | |
451 | ssize_t ret = 0; | |
452 | struct cmsghdr *cmsg; | |
453 | size_t sizeof_fds = nb_fd * sizeof(int); | |
454 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
455 | struct msghdr msg; | |
456 | char dummy; | |
18ef3e51 | 457 | int i; |
7bc53e94 | 458 | |
74d81a6c | 459 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 460 | |
74d81a6c MD |
461 | /* Prepare to receive the structures */ |
462 | iov[0].iov_base = &dummy; | |
463 | iov[0].iov_len = 1; | |
464 | msg.msg_iov = iov; | |
465 | msg.msg_iovlen = 1; | |
466 | msg.msg_control = recv_fd; | |
467 | msg.msg_controllen = sizeof(recv_fd); | |
468 | ||
469 | do { | |
470 | ret = recvmsg(sock, &msg, 0); | |
471 | } while (ret < 0 && errno == EINTR); | |
472 | if (ret < 0) { | |
473 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 474 | PERROR("recvmsg fds"); |
74d81a6c | 475 | } |
8cf811d3 | 476 | ret = -errno; |
b869b5ae MD |
477 | if (ret == -ECONNRESET) |
478 | ret = -EPIPE; | |
74d81a6c MD |
479 | goto end; |
480 | } | |
481 | if (ret == 0) { | |
482 | /* orderly shutdown */ | |
483 | ret = -EPIPE; | |
484 | goto end; | |
485 | } | |
486 | if (ret != 1) { | |
32ce8569 | 487 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
488 | ret, 1); |
489 | goto end; | |
490 | } | |
491 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 492 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
493 | ret = -1; |
494 | goto end; | |
495 | } | |
496 | cmsg = CMSG_FIRSTHDR(&msg); | |
497 | if (!cmsg) { | |
32ce8569 | 498 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
499 | ret = -1; |
500 | goto end; | |
501 | } | |
502 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 503 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
504 | ret = -1; |
505 | goto end; | |
506 | } | |
507 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 508 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
509 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
510 | ret = -1; | |
511 | goto end; | |
512 | } | |
18ef3e51 | 513 | |
74d81a6c | 514 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); |
18ef3e51 JR |
515 | |
516 | /* Set FD_CLOEXEC */ | |
517 | for (i = 0; i < nb_fd; i++) { | |
518 | ret = fcntl(fds[i], F_SETFD, FD_CLOEXEC); | |
519 | if (ret < 0) { | |
520 | PERROR("fcntl failed to set FD_CLOEXEC on fd %d", | |
521 | fds[i]); | |
522 | } | |
523 | } | |
524 | ||
b2a050e0 | 525 | ret = nb_fd; |
74d81a6c | 526 | end: |
67c5b804 MD |
527 | return ret; |
528 | } | |
57773204 MD |
529 | |
530 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
531 | { | |
532 | ssize_t len; | |
533 | ||
534 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
535 | switch (len) { | |
536 | case sizeof(*lum): | |
57773204 | 537 | break; |
57773204 | 538 | default: |
7bc53e94 | 539 | if (len < 0) { |
7bc53e94 MD |
540 | return len; |
541 | } else { | |
32ce8569 | 542 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
543 | return -EINVAL; |
544 | } | |
57773204 MD |
545 | } |
546 | return 0; | |
547 | } | |
548 | ||
549 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
550 | uint32_t expected_handle, uint32_t expected_cmd) | |
551 | { | |
552 | ssize_t len; | |
553 | ||
554 | memset(lur, 0, sizeof(*lur)); | |
555 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
556 | switch (len) { | |
557 | case 0: /* orderly shutdown */ | |
74d81a6c | 558 | return -EPIPE; |
57773204 | 559 | case sizeof(*lur): |
5dafeeaa MD |
560 | { |
561 | int err = 0; | |
562 | ||
57773204 | 563 | if (lur->handle != expected_handle) { |
32ce8569 | 564 | ERR("Unexpected result message handle: " |
74d81a6c MD |
565 | "expected: %u vs received: %u\n", |
566 | expected_handle, lur->handle); | |
5dafeeaa | 567 | err = 1; |
57773204 | 568 | } |
57773204 | 569 | if (lur->cmd != expected_cmd) { |
32ce8569 | 570 | ERR("Unexpected result message command " |
74d81a6c MD |
571 | "expected: %u vs received: %u\n", |
572 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
573 | err = 1; |
574 | } | |
575 | if (err) { | |
57773204 | 576 | return -EINVAL; |
5dafeeaa MD |
577 | } else { |
578 | return lur->ret_code; | |
57773204 | 579 | } |
5dafeeaa | 580 | } |
57773204 | 581 | default: |
8cf811d3 | 582 | if (len >= 0) { |
32ce8569 | 583 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 584 | } |
8cf811d3 | 585 | return len; |
57773204 MD |
586 | } |
587 | } | |
588 | ||
589 | int ustcomm_send_app_cmd(int sock, | |
590 | struct ustcomm_ust_msg *lum, | |
591 | struct ustcomm_ust_reply *lur) | |
592 | { | |
593 | int ret; | |
594 | ||
595 | ret = ustcomm_send_app_msg(sock, lum); | |
596 | if (ret) | |
597 | return ret; | |
c354a72c MD |
598 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
599 | if (ret > 0) | |
600 | return -EIO; | |
601 | return ret; | |
57773204 MD |
602 | } |
603 | ||
57773204 | 604 | /* |
74d81a6c MD |
605 | * chan_data is allocated internally if this function returns the |
606 | * expected var_len. | |
57773204 | 607 | */ |
74d81a6c | 608 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
609 | void **_chan_data, uint64_t var_len, |
610 | int *_wakeup_fd) | |
57773204 | 611 | { |
74d81a6c | 612 | void *chan_data; |
ff0f5728 | 613 | ssize_t len, nr_fd; |
f5c453e9 | 614 | int wakeup_fd, ret; |
57773204 | 615 | |
74d81a6c MD |
616 | if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) { |
617 | len = -EINVAL; | |
618 | goto error_check; | |
57773204 | 619 | } |
74d81a6c MD |
620 | /* Receive variable length data */ |
621 | chan_data = zmalloc(var_len); | |
622 | if (!chan_data) { | |
623 | len = -ENOMEM; | |
624 | goto error_alloc; | |
57773204 | 625 | } |
74d81a6c MD |
626 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
627 | if (len != var_len) { | |
628 | goto error_recv; | |
57773204 | 629 | } |
ff0f5728 | 630 | /* recv wakeup fd */ |
6548fca4 | 631 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
632 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
633 | if (nr_fd <= 0) { | |
6548fca4 | 634 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
635 | if (nr_fd < 0) { |
636 | len = nr_fd; | |
637 | goto error_recv; | |
638 | } else { | |
639 | len = -EIO; | |
640 | goto error_recv; | |
641 | } | |
642 | } | |
f5c453e9 JR |
643 | |
644 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
645 | if (ret < 0) { | |
646 | lttng_ust_unlock_fd_tracker(); | |
647 | ret = close(wakeup_fd); | |
648 | if (ret) { | |
649 | PERROR("close on wakeup_fd"); | |
650 | } | |
651 | len = -EIO; | |
652 | goto error_recv; | |
653 | } | |
654 | ||
655 | *_wakeup_fd = ret; | |
6548fca4 | 656 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 657 | |
74d81a6c MD |
658 | *_chan_data = chan_data; |
659 | return len; | |
660 | ||
661 | error_recv: | |
662 | free(chan_data); | |
663 | error_alloc: | |
664 | error_check: | |
665 | return len; | |
666 | } | |
7bc53e94 | 667 | |
74d81a6c MD |
668 | int ustcomm_recv_stream_from_sessiond(int sock, |
669 | uint64_t *memory_map_size, | |
670 | int *shm_fd, int *wakeup_fd) | |
671 | { | |
672 | ssize_t len; | |
673 | int ret; | |
674 | int fds[2]; | |
675 | ||
676 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 677 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
678 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
679 | if (len <= 0) { | |
6548fca4 | 680 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
681 | if (len < 0) { |
682 | ret = len; | |
683 | goto error; | |
684 | } else { | |
685 | ret = -EIO; | |
686 | goto error; | |
687 | } | |
7bc53e94 | 688 | } |
f5c453e9 JR |
689 | |
690 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
691 | if (ret < 0) { | |
692 | lttng_ust_unlock_fd_tracker(); | |
693 | ret = close(fds[0]); | |
694 | if (ret) { | |
695 | PERROR("close on received shm_fd"); | |
696 | } | |
697 | ret = -EIO; | |
698 | goto error; | |
699 | } | |
700 | *shm_fd = ret; | |
701 | ||
702 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
703 | if (ret < 0) { | |
704 | lttng_ust_unlock_fd_tracker(); | |
705 | ret = close(*shm_fd); | |
706 | if (ret) { | |
707 | PERROR("close on shm_fd"); | |
708 | } | |
709 | *shm_fd = -1; | |
710 | ret = close(fds[1]); | |
711 | if (ret) { | |
712 | PERROR("close on received wakeup_fd"); | |
713 | } | |
714 | ret = -EIO; | |
715 | goto error; | |
716 | } | |
717 | *wakeup_fd = ret; | |
6548fca4 | 718 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
719 | return 0; |
720 | ||
721 | error: | |
57773204 MD |
722 | return ret; |
723 | } | |
32ce8569 MD |
724 | |
725 | /* | |
726 | * Returns 0 on success, negative error value on error. | |
727 | */ | |
728 | int ustcomm_send_reg_msg(int sock, | |
729 | enum ustctl_socket_type type, | |
730 | uint32_t bits_per_long, | |
731 | uint32_t uint8_t_alignment, | |
732 | uint32_t uint16_t_alignment, | |
733 | uint32_t uint32_t_alignment, | |
734 | uint32_t uint64_t_alignment, | |
735 | uint32_t long_alignment) | |
736 | { | |
737 | ssize_t len; | |
738 | struct ustctl_reg_msg reg_msg; | |
739 | ||
740 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
741 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
742 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
743 | reg_msg.pid = getpid(); | |
744 | reg_msg.ppid = getppid(); | |
745 | reg_msg.uid = getuid(); | |
746 | reg_msg.gid = getgid(); | |
747 | reg_msg.bits_per_long = bits_per_long; | |
748 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
749 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
750 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
751 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
752 | reg_msg.long_alignment = long_alignment; | |
753 | reg_msg.socket_type = type; | |
754 | lttng_ust_getprocname(reg_msg.name); | |
755 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); | |
756 | ||
757 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
758 | if (len > 0 && len != sizeof(reg_msg)) | |
759 | return -EIO; | |
760 | if (len < 0) | |
761 | return len; | |
762 | return 0; | |
763 | } | |
764 | ||
53569322 MD |
765 | static |
766 | ssize_t count_one_type(const struct lttng_type *lt) | |
767 | { | |
768 | switch (lt->atype) { | |
769 | case atype_integer: | |
770 | case atype_float: | |
771 | case atype_string: | |
772 | case atype_enum: | |
773 | case atype_array: | |
774 | case atype_sequence: | |
775 | return 1; | |
776 | case atype_struct: | |
777 | //TODO: implement non-empty struct. | |
778 | return 1; | |
779 | case atype_dynamic: | |
780 | { | |
781 | const struct lttng_event_field *choices; | |
782 | size_t nr_choices; | |
783 | int ret; | |
784 | ||
785 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
786 | &choices); | |
787 | if (ret) | |
788 | return ret; | |
789 | /* | |
790 | * One field for enum, one field for variant, and | |
791 | * one field per choice. | |
792 | */ | |
793 | return count_fields_recursive(nr_choices, choices) + 2; | |
794 | } | |
795 | default: | |
796 | return -EINVAL; | |
797 | } | |
798 | return 0; | |
799 | } | |
800 | ||
801 | static | |
802 | ssize_t count_fields_recursive(size_t nr_fields, | |
803 | const struct lttng_event_field *lttng_fields) | |
804 | { | |
805 | int i; | |
806 | ssize_t ret, count = 0; | |
807 | ||
808 | for (i = 0; i < nr_fields; i++) { | |
809 | const struct lttng_event_field *lf; | |
810 | ||
811 | lf = <tng_fields[i]; | |
812 | /* skip 'nowrite' fields */ | |
813 | if (lf->nowrite) | |
814 | continue; | |
815 | ret = count_one_type(&lf->type); | |
816 | if (ret < 0) | |
817 | return ret; /* error */ | |
818 | count += ret; | |
819 | } | |
820 | return count; | |
821 | } | |
822 | ||
823 | static | |
824 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
825 | const struct lttng_ctx_field *lttng_fields) | |
826 | { | |
827 | int i; | |
828 | ssize_t ret, count = 0; | |
829 | ||
830 | for (i = 0; i < nr_fields; i++) { | |
831 | const struct lttng_event_field *lf; | |
832 | ||
833 | lf = <tng_fields[i].event_field; | |
834 | /* skip 'nowrite' fields */ | |
835 | if (lf->nowrite) | |
836 | continue; | |
837 | ret = count_one_type(&lf->type); | |
838 | if (ret < 0) | |
839 | return ret; /* error */ | |
840 | count += ret; | |
841 | } | |
842 | return count; | |
843 | } | |
844 | ||
7f2348b8 | 845 | static |
735ea6a8 | 846 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
847 | enum lttng_string_encodings le) |
848 | { | |
849 | switch (le) { | |
850 | case lttng_encode_none: | |
851 | *ue = ustctl_encode_none; | |
852 | break; | |
853 | case lttng_encode_UTF8: | |
854 | *ue = ustctl_encode_UTF8; | |
855 | break; | |
856 | case lttng_encode_ASCII: | |
857 | *ue = ustctl_encode_ASCII; | |
858 | break; | |
859 | default: | |
860 | return -EINVAL; | |
861 | } | |
862 | return 0; | |
863 | } | |
864 | ||
32ce8569 | 865 | static |
c785c634 MD |
866 | int serialize_integer_type(struct ustctl_integer_type *uit, |
867 | const struct lttng_integer_type *lit) | |
868 | { | |
973eac63 GAPG |
869 | int32_t encoding; |
870 | ||
c785c634 MD |
871 | uit->size = lit->size; |
872 | uit->signedness = lit->signedness; | |
873 | uit->reverse_byte_order = lit->reverse_byte_order; | |
874 | uit->base = lit->base; | |
973eac63 | 875 | if (serialize_string_encoding(&encoding, lit->encoding)) |
c785c634 | 876 | return -EINVAL; |
973eac63 | 877 | uit->encoding = encoding; |
c785c634 MD |
878 | uit->alignment = lit->alignment; |
879 | return 0; | |
880 | } | |
881 | ||
882 | static | |
883 | int serialize_basic_type(struct lttng_session *session, | |
884 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 885 | enum lttng_abstract_types atype, |
32ce8569 MD |
886 | union _ustctl_basic_type *ubt, |
887 | const union _lttng_basic_type *lbt) | |
888 | { | |
889 | switch (atype) { | |
890 | case atype_integer: | |
891 | { | |
c785c634 | 892 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 893 | return -EINVAL; |
2b213b16 | 894 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
895 | break; |
896 | } | |
897 | case atype_string: | |
898 | { | |
973eac63 GAPG |
899 | int32_t encoding; |
900 | ||
901 | if (serialize_string_encoding(&encoding, lbt->string.encoding)) | |
7f2348b8 | 902 | return -EINVAL; |
973eac63 | 903 | ubt->string.encoding = encoding; |
2b213b16 | 904 | *uatype = ustctl_atype_string; |
32ce8569 MD |
905 | break; |
906 | } | |
907 | case atype_float: | |
908 | { | |
909 | struct ustctl_float_type *uft; | |
910 | const struct lttng_float_type *lft; | |
911 | ||
912 | uft = &ubt->_float; | |
913 | lft = &lbt->_float; | |
914 | uft->exp_dig = lft->exp_dig; | |
915 | uft->mant_dig = lft->mant_dig; | |
916 | uft->alignment = lft->alignment; | |
917 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 918 | *uatype = ustctl_atype_float; |
32ce8569 MD |
919 | break; |
920 | } | |
921 | case atype_enum: | |
c785c634 MD |
922 | { |
923 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
924 | LTTNG_UST_SYM_NAME_LEN); | |
925 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
926 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
927 | &lbt->enumeration.container_type)) | |
928 | return -EINVAL; | |
929 | if (session) { | |
930 | const struct lttng_enum *_enum; | |
931 | ||
b33b46f7 | 932 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
933 | if (!_enum) |
934 | return -EINVAL; | |
935 | ubt->enumeration.id = _enum->id; | |
936 | } else { | |
937 | ubt->enumeration.id = -1ULL; | |
938 | } | |
939 | *uatype = ustctl_atype_enum; | |
940 | break; | |
941 | } | |
32ce8569 MD |
942 | case atype_array: |
943 | case atype_sequence: | |
944 | default: | |
945 | return -EINVAL; | |
946 | } | |
947 | return 0; | |
32ce8569 MD |
948 | } |
949 | ||
950 | static | |
53569322 MD |
951 | int serialize_dynamic_type(struct lttng_session *session, |
952 | struct ustctl_field *fields, size_t *iter_output, | |
953 | const struct lttng_event_field *lf) | |
32ce8569 | 954 | { |
53569322 MD |
955 | const struct lttng_event_field *choices; |
956 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
957 | const struct lttng_type *tag_type; | |
958 | const struct lttng_event_field *tag_field_generic; | |
959 | struct lttng_event_field tag_field = { | |
960 | .name = tag_field_name, | |
961 | .nowrite = 0, | |
962 | }; | |
963 | struct ustctl_field *uf; | |
964 | size_t nr_choices, i; | |
32ce8569 MD |
965 | int ret; |
966 | ||
53569322 MD |
967 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
968 | tag_type = &tag_field_generic->type; | |
969 | ||
970 | /* Serialize enum field. */ | |
971 | strncpy(tag_field_name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
972 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
973 | strncat(tag_field_name, | |
974 | "_tag", | |
975 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
976 | tag_field.type = *tag_type; | |
977 | ret = serialize_one_field(session, fields, iter_output, | |
978 | &tag_field); | |
979 | if (ret) | |
980 | return ret; | |
981 | ||
982 | /* Serialize variant field. */ | |
983 | uf = &fields[*iter_output]; | |
984 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
985 | if (ret) | |
986 | return ret; | |
987 | ||
988 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
989 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
990 | uf->type.atype = ustctl_atype_variant; | |
991 | uf->type.u.variant.nr_choices = nr_choices; | |
992 | strncpy(uf->type.u.variant.tag_name, | |
993 | tag_field_name, | |
994 | LTTNG_UST_SYM_NAME_LEN); | |
995 | uf->type.u.variant.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
996 | (*iter_output)++; | |
997 | ||
998 | /* Serialize choice fields after variant. */ | |
999 | for (i = 0; i < nr_choices; i++) { | |
1000 | ret = serialize_one_field(session, fields, | |
1001 | iter_output, &choices[i]); | |
1002 | if (ret) | |
1003 | return ret; | |
1004 | } | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static | |
1009 | int serialize_one_field(struct lttng_session *session, | |
1010 | struct ustctl_field *fields, size_t *iter_output, | |
1011 | const struct lttng_event_field *lf) | |
1012 | { | |
1013 | const struct lttng_type *lt = &lf->type; | |
1014 | int ret; | |
1015 | ||
1016 | /* skip 'nowrite' fields */ | |
1017 | if (lf->nowrite) | |
1018 | return 0; | |
1019 | ||
32ce8569 MD |
1020 | switch (lt->atype) { |
1021 | case atype_integer: | |
1022 | case atype_float: | |
1023 | case atype_string: | |
c785c634 | 1024 | case atype_enum: |
53569322 MD |
1025 | { |
1026 | struct ustctl_field *uf = &fields[*iter_output]; | |
1027 | struct ustctl_type *ut = &uf->type; | |
973eac63 | 1028 | enum ustctl_abstract_types atype; |
53569322 MD |
1029 | |
1030 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1031 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
973eac63 | 1032 | ret = serialize_basic_type(session, &atype, lt->atype, |
32ce8569 MD |
1033 | &ut->u.basic, <->u.basic); |
1034 | if (ret) | |
1035 | return ret; | |
973eac63 | 1036 | ut->atype = atype; |
53569322 | 1037 | (*iter_output)++; |
32ce8569 | 1038 | break; |
53569322 | 1039 | } |
32ce8569 MD |
1040 | case atype_array: |
1041 | { | |
53569322 MD |
1042 | struct ustctl_field *uf = &fields[*iter_output]; |
1043 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1044 | struct ustctl_basic_type *ubt; |
1045 | const struct lttng_basic_type *lbt; | |
973eac63 | 1046 | enum ustctl_abstract_types atype; |
32ce8569 | 1047 | |
53569322 MD |
1048 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1049 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1050 | uf->type.atype = ustctl_atype_array; | |
32ce8569 MD |
1051 | ubt = &ut->u.array.elem_type; |
1052 | lbt = <->u.array.elem_type; | |
1053 | ut->u.array.length = lt->u.array.length; | |
973eac63 | 1054 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1055 | &ubt->u.basic, &lbt->u.basic); |
1056 | if (ret) | |
1057 | return -EINVAL; | |
973eac63 | 1058 | ubt->atype = atype; |
2b213b16 | 1059 | ut->atype = ustctl_atype_array; |
53569322 | 1060 | (*iter_output)++; |
32ce8569 MD |
1061 | break; |
1062 | } | |
1063 | case atype_sequence: | |
1064 | { | |
53569322 MD |
1065 | struct ustctl_field *uf = &fields[*iter_output]; |
1066 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1067 | struct ustctl_basic_type *ubt; |
1068 | const struct lttng_basic_type *lbt; | |
973eac63 | 1069 | enum ustctl_abstract_types atype; |
32ce8569 MD |
1070 | int ret; |
1071 | ||
53569322 MD |
1072 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1073 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1074 | uf->type.atype = ustctl_atype_sequence; | |
32ce8569 MD |
1075 | ubt = &ut->u.sequence.length_type; |
1076 | lbt = <->u.sequence.length_type; | |
973eac63 | 1077 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1078 | &ubt->u.basic, &lbt->u.basic); |
1079 | if (ret) | |
1080 | return -EINVAL; | |
973eac63 | 1081 | ubt->atype = atype; |
32ce8569 MD |
1082 | ubt = &ut->u.sequence.elem_type; |
1083 | lbt = <->u.sequence.elem_type; | |
973eac63 | 1084 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1085 | &ubt->u.basic, &lbt->u.basic); |
1086 | if (ret) | |
1087 | return -EINVAL; | |
973eac63 | 1088 | ubt->atype = atype; |
2b213b16 | 1089 | ut->atype = ustctl_atype_sequence; |
53569322 MD |
1090 | (*iter_output)++; |
1091 | break; | |
1092 | } | |
1093 | case atype_dynamic: | |
1094 | { | |
1095 | ret = serialize_dynamic_type(session, fields, iter_output, lf); | |
1096 | if (ret) | |
1097 | return -EINVAL; | |
1098 | break; | |
1099 | } | |
1100 | case atype_struct: | |
1101 | { | |
1102 | struct ustctl_field *uf = &fields[*iter_output]; | |
1103 | ||
1104 | /* | |
1105 | * TODO: add support for non-empty struct. | |
1106 | */ | |
1107 | if (lf->type.u._struct.nr_fields != 0) { | |
1108 | return -EINVAL; | |
1109 | } | |
1110 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1111 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1112 | uf->type.atype = ustctl_atype_struct; | |
1113 | uf->type.u._struct.nr_fields = 0; | |
1114 | (*iter_output)++; | |
32ce8569 MD |
1115 | break; |
1116 | } | |
32ce8569 MD |
1117 | default: |
1118 | return -EINVAL; | |
1119 | } | |
1120 | return 0; | |
1121 | } | |
1122 | ||
1123 | static | |
c785c634 MD |
1124 | int serialize_fields(struct lttng_session *session, |
1125 | size_t *_nr_write_fields, | |
32ce8569 MD |
1126 | struct ustctl_field **ustctl_fields, |
1127 | size_t nr_fields, | |
1128 | const struct lttng_event_field *lttng_fields) | |
1129 | { | |
1130 | struct ustctl_field *fields; | |
53569322 MD |
1131 | int ret; |
1132 | size_t i, iter_output = 0; | |
1133 | ssize_t nr_write_fields; | |
1134 | ||
1135 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1136 | if (nr_write_fields < 0) { | |
1137 | return (int) nr_write_fields; | |
1138 | } | |
32ce8569 | 1139 | |
53569322 | 1140 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1141 | if (!fields) |
1142 | return -ENOMEM; | |
1143 | ||
1144 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1145 | ret = serialize_one_field(session, fields, &iter_output, |
1146 | <tng_fields[i]); | |
32ce8569 MD |
1147 | if (ret) |
1148 | goto error_type; | |
32ce8569 MD |
1149 | } |
1150 | ||
1151 | *_nr_write_fields = nr_write_fields; | |
1152 | *ustctl_fields = fields; | |
1153 | return 0; | |
1154 | ||
1155 | error_type: | |
1156 | free(fields); | |
1157 | return ret; | |
1158 | } | |
1159 | ||
c785c634 MD |
1160 | static |
1161 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1162 | size_t nr_entries, | |
1163 | const struct lttng_enum_entry *lttng_entries) | |
1164 | { | |
1165 | struct ustctl_enum_entry *entries; | |
1166 | int i; | |
1167 | ||
1168 | /* Serialize the entries */ | |
1169 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1170 | if (!entries) | |
1171 | return -ENOMEM; | |
1172 | for (i = 0; i < nr_entries; i++) { | |
1173 | struct ustctl_enum_entry *uentry; | |
1174 | const struct lttng_enum_entry *lentry; | |
1175 | ||
1176 | uentry = &entries[i]; | |
1177 | lentry = <tng_entries[i]; | |
1178 | ||
a6f80644 MD |
1179 | uentry->start.value = lentry->start.value; |
1180 | uentry->start.signedness = lentry->start.signedness; | |
1181 | uentry->end.value = lentry->end.value; | |
1182 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1183 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1184 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1185 | |
1186 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1187 | uentry->u.extra.options |= | |
1188 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1189 | } | |
c785c634 MD |
1190 | } |
1191 | *_entries = entries; | |
1192 | return 0; | |
1193 | } | |
1194 | ||
83e43212 | 1195 | static |
53569322 MD |
1196 | int serialize_ctx_fields(struct lttng_session *session, |
1197 | size_t *_nr_write_fields, | |
83e43212 MD |
1198 | struct ustctl_field **ustctl_fields, |
1199 | size_t nr_fields, | |
1200 | const struct lttng_ctx_field *lttng_fields) | |
1201 | { | |
1202 | struct ustctl_field *fields; | |
53569322 MD |
1203 | int ret; |
1204 | size_t i, iter_output = 0; | |
1205 | ssize_t nr_write_fields; | |
83e43212 | 1206 | |
53569322 MD |
1207 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1208 | lttng_fields); | |
1209 | if (nr_write_fields < 0) { | |
1210 | return (int) nr_write_fields; | |
1211 | } | |
1212 | ||
1213 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1214 | if (!fields) |
1215 | return -ENOMEM; | |
1216 | ||
1217 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1218 | ret = serialize_one_field(session, fields, &iter_output, |
1219 | <tng_fields[i].event_field); | |
83e43212 MD |
1220 | if (ret) |
1221 | goto error_type; | |
83e43212 MD |
1222 | } |
1223 | ||
1224 | *_nr_write_fields = nr_write_fields; | |
1225 | *ustctl_fields = fields; | |
1226 | return 0; | |
1227 | ||
1228 | error_type: | |
1229 | free(fields); | |
1230 | return ret; | |
1231 | } | |
1232 | ||
32ce8569 MD |
1233 | /* |
1234 | * Returns 0 on success, negative error value on error. | |
1235 | */ | |
1236 | int ustcomm_register_event(int sock, | |
c785c634 | 1237 | struct lttng_session *session, |
32ce8569 MD |
1238 | int session_objd, /* session descriptor */ |
1239 | int channel_objd, /* channel descriptor */ | |
1240 | const char *event_name, /* event name (input) */ | |
1241 | int loglevel, | |
1242 | const char *signature, /* event signature (input) */ | |
1243 | size_t nr_fields, /* fields */ | |
1244 | const struct lttng_event_field *lttng_fields, | |
1245 | const char *model_emf_uri, | |
1246 | uint32_t *id) /* event id (output) */ | |
1247 | { | |
1248 | ssize_t len; | |
1249 | struct { | |
1250 | struct ustcomm_notify_hdr header; | |
1251 | struct ustcomm_notify_event_msg m; | |
1252 | } msg; | |
1253 | struct { | |
1254 | struct ustcomm_notify_hdr header; | |
1255 | struct ustcomm_notify_event_reply r; | |
1256 | } reply; | |
1257 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1258 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1259 | size_t nr_write_fields = 0; |
1260 | int ret; | |
1261 | ||
1262 | memset(&msg, 0, sizeof(msg)); | |
1263 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1264 | msg.m.session_objd = session_objd; | |
1265 | msg.m.channel_objd = channel_objd; | |
1266 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1267 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1268 | msg.m.loglevel = loglevel; | |
1269 | signature_len = strlen(signature) + 1; | |
1270 | msg.m.signature_len = signature_len; | |
1271 | ||
1272 | /* Calculate fields len, serialize fields. */ | |
1273 | if (nr_fields > 0) { | |
c785c634 | 1274 | ret = serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1275 | nr_fields, lttng_fields); |
1276 | if (ret) | |
1277 | return ret; | |
1278 | } | |
1279 | ||
1280 | fields_len = sizeof(*fields) * nr_write_fields; | |
1281 | msg.m.fields_len = fields_len; | |
1282 | if (model_emf_uri) { | |
1283 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1284 | } else { | |
1285 | model_emf_uri_len = 0; | |
1286 | } | |
1287 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1288 | |
32ce8569 MD |
1289 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1290 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1291 | ret = -EIO; |
1292 | goto error_fields; | |
32ce8569 MD |
1293 | } |
1294 | if (len < 0) { | |
c785c634 MD |
1295 | ret = len; |
1296 | goto error_fields; | |
32ce8569 MD |
1297 | } |
1298 | ||
1299 | /* send signature */ | |
1300 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1301 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1302 | ret = -EIO; |
1303 | goto error_fields; | |
32ce8569 MD |
1304 | } |
1305 | if (len < 0) { | |
6b95617c MD |
1306 | ret = len; |
1307 | goto error_fields; | |
32ce8569 MD |
1308 | } |
1309 | ||
1310 | /* send fields */ | |
1311 | if (fields_len > 0) { | |
1312 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1313 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1314 | ret = -EIO; |
1315 | goto error_fields; | |
32ce8569 MD |
1316 | } |
1317 | if (len < 0) { | |
c785c634 MD |
1318 | ret = len; |
1319 | goto error_fields; | |
32ce8569 MD |
1320 | } |
1321 | } | |
6b95617c | 1322 | free(fields); |
32ce8569 MD |
1323 | |
1324 | if (model_emf_uri_len) { | |
1325 | /* send model_emf_uri */ | |
1326 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1327 | model_emf_uri_len); | |
c785c634 | 1328 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1329 | return -EIO; |
c785c634 MD |
1330 | } |
1331 | if (len < 0) { | |
6b95617c | 1332 | return len; |
c785c634 | 1333 | } |
32ce8569 MD |
1334 | } |
1335 | ||
1336 | /* receive reply */ | |
1337 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1338 | switch (len) { | |
1339 | case 0: /* orderly shutdown */ | |
1340 | return -EPIPE; | |
1341 | case sizeof(reply): | |
1342 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1343 | ERR("Unexpected result message command " | |
1344 | "expected: %u vs received: %u\n", | |
1345 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1346 | return -EINVAL; | |
1347 | } | |
1348 | if (reply.r.ret_code > 0) | |
1349 | return -EINVAL; | |
1350 | if (reply.r.ret_code < 0) | |
1351 | return reply.r.ret_code; | |
1352 | *id = reply.r.event_id; | |
1353 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1354 | event_name, reply.r.ret_code, reply.r.event_id); | |
1355 | return 0; | |
1356 | default: | |
1357 | if (len < 0) { | |
1358 | /* Transport level error */ | |
1359 | if (errno == EPIPE || errno == ECONNRESET) | |
1360 | len = -errno; | |
1361 | return len; | |
1362 | } else { | |
1363 | ERR("incorrect message size: %zd\n", len); | |
1364 | return len; | |
1365 | } | |
1366 | } | |
6b95617c | 1367 | /* Unreached. */ |
c785c634 | 1368 | |
6b95617c | 1369 | /* Error path only. */ |
c785c634 MD |
1370 | error_fields: |
1371 | free(fields); | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | /* | |
1376 | * Returns 0 on success, negative error value on error. | |
1377 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1378 | */ | |
1379 | int ustcomm_register_enum(int sock, | |
1380 | int session_objd, /* session descriptor */ | |
1381 | const char *enum_name, /* enum name (input) */ | |
1382 | size_t nr_entries, /* entries */ | |
1383 | const struct lttng_enum_entry *lttng_entries, | |
1384 | uint64_t *id) | |
1385 | { | |
1386 | ssize_t len; | |
1387 | struct { | |
1388 | struct ustcomm_notify_hdr header; | |
1389 | struct ustcomm_notify_enum_msg m; | |
1390 | } msg; | |
1391 | struct { | |
1392 | struct ustcomm_notify_hdr header; | |
1393 | struct ustcomm_notify_enum_reply r; | |
1394 | } reply; | |
1395 | size_t entries_len; | |
1396 | struct ustctl_enum_entry *entries = NULL; | |
1397 | int ret; | |
1398 | ||
1399 | memset(&msg, 0, sizeof(msg)); | |
1400 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1401 | msg.m.session_objd = session_objd; | |
1402 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1403 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1404 | ||
1405 | /* Calculate entries len, serialize entries. */ | |
1406 | if (nr_entries > 0) { | |
1407 | ret = serialize_entries(&entries, | |
1408 | nr_entries, lttng_entries); | |
1409 | if (ret) | |
1410 | return ret; | |
1411 | } | |
1412 | ||
1413 | entries_len = sizeof(*entries) * nr_entries; | |
1414 | msg.m.entries_len = entries_len; | |
1415 | ||
1416 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1417 | if (len > 0 && len != sizeof(msg)) { | |
1418 | ret = -EIO; | |
1419 | goto error_entries; | |
1420 | } | |
1421 | if (len < 0) { | |
1422 | ret = len; | |
1423 | goto error_entries; | |
1424 | } | |
1425 | ||
1426 | /* send entries */ | |
1427 | if (entries_len > 0) { | |
1428 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1429 | if (len > 0 && len != entries_len) { | |
1430 | ret = -EIO; | |
1431 | goto error_entries; | |
1432 | } | |
1433 | if (len < 0) { | |
1434 | ret = len; | |
1435 | goto error_entries; | |
1436 | } | |
1437 | } | |
1438 | free(entries); | |
1439 | entries = NULL; | |
1440 | ||
1441 | /* receive reply */ | |
1442 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1443 | switch (len) { | |
1444 | case 0: /* orderly shutdown */ | |
1445 | return -EPIPE; | |
1446 | case sizeof(reply): | |
1447 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1448 | ERR("Unexpected result message command " | |
1449 | "expected: %u vs received: %u\n", | |
1450 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1451 | return -EINVAL; | |
1452 | } | |
1453 | if (reply.r.ret_code > 0) | |
1454 | return -EINVAL; | |
1455 | if (reply.r.ret_code < 0) | |
1456 | return reply.r.ret_code; | |
1457 | *id = reply.r.enum_id; | |
1458 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1459 | enum_name, reply.r.ret_code); | |
1460 | return 0; | |
1461 | default: | |
1462 | if (len < 0) { | |
1463 | /* Transport level error */ | |
1464 | if (errno == EPIPE || errno == ECONNRESET) | |
1465 | len = -errno; | |
1466 | return len; | |
1467 | } else { | |
1468 | ERR("incorrect message size: %zd\n", len); | |
1469 | return len; | |
1470 | } | |
1471 | } | |
1472 | return ret; | |
1473 | ||
1474 | error_entries: | |
1475 | free(entries); | |
1476 | return ret; | |
32ce8569 MD |
1477 | } |
1478 | ||
1479 | /* | |
1480 | * Returns 0 on success, negative error value on error. | |
1481 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1482 | */ | |
1483 | int ustcomm_register_channel(int sock, | |
53569322 | 1484 | struct lttng_session *session, |
32ce8569 MD |
1485 | int session_objd, /* session descriptor */ |
1486 | int channel_objd, /* channel descriptor */ | |
1487 | size_t nr_ctx_fields, | |
83e43212 | 1488 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1489 | uint32_t *chan_id, /* channel id (output) */ |
1490 | int *header_type) /* header type (output) */ | |
1491 | { | |
1492 | ssize_t len; | |
1493 | struct { | |
1494 | struct ustcomm_notify_hdr header; | |
1495 | struct ustcomm_notify_channel_msg m; | |
1496 | } msg; | |
1497 | struct { | |
1498 | struct ustcomm_notify_hdr header; | |
1499 | struct ustcomm_notify_channel_reply r; | |
1500 | } reply; | |
1501 | size_t fields_len; | |
83e43212 | 1502 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1503 | int ret; |
1504 | size_t nr_write_fields = 0; | |
1505 | ||
1506 | memset(&msg, 0, sizeof(msg)); | |
1507 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1508 | msg.m.session_objd = session_objd; | |
1509 | msg.m.channel_objd = channel_objd; | |
1510 | ||
1511 | /* Calculate fields len, serialize fields. */ | |
1512 | if (nr_ctx_fields > 0) { | |
53569322 | 1513 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1514 | nr_ctx_fields, ctx_fields); |
1515 | if (ret) | |
1516 | return ret; | |
1517 | } | |
1518 | ||
1519 | fields_len = sizeof(*fields) * nr_write_fields; | |
1520 | msg.m.ctx_fields_len = fields_len; | |
1521 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1522 | if (len > 0 && len != sizeof(msg)) { | |
1523 | free(fields); | |
1524 | return -EIO; | |
1525 | } | |
1526 | if (len < 0) { | |
1527 | free(fields); | |
1528 | return len; | |
1529 | } | |
1530 | ||
1531 | /* send fields */ | |
1532 | if (fields_len > 0) { | |
1533 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1534 | free(fields); | |
1535 | if (len > 0 && len != fields_len) { | |
1536 | return -EIO; | |
1537 | } | |
1538 | if (len < 0) { | |
1539 | return len; | |
1540 | } | |
17ea789c MD |
1541 | } else { |
1542 | free(fields); | |
32ce8569 MD |
1543 | } |
1544 | ||
1545 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1546 | switch (len) { | |
1547 | case 0: /* orderly shutdown */ | |
1548 | return -EPIPE; | |
1549 | case sizeof(reply): | |
1550 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1551 | ERR("Unexpected result message command " | |
1552 | "expected: %u vs received: %u\n", | |
1553 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1554 | return -EINVAL; | |
1555 | } | |
1556 | if (reply.r.ret_code > 0) | |
1557 | return -EINVAL; | |
1558 | if (reply.r.ret_code < 0) | |
1559 | return reply.r.ret_code; | |
1560 | *chan_id = reply.r.chan_id; | |
1561 | switch (reply.r.header_type) { | |
1562 | case 1: | |
1563 | case 2: | |
1564 | *header_type = reply.r.header_type; | |
1565 | break; | |
1566 | default: | |
1567 | ERR("Unexpected channel header type %u\n", | |
1568 | reply.r.header_type); | |
1569 | return -EINVAL; | |
1570 | } | |
1571 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1572 | reply.r.chan_id, reply.r.header_type); | |
1573 | return 0; | |
1574 | default: | |
1575 | if (len < 0) { | |
1576 | /* Transport level error */ | |
1577 | if (errno == EPIPE || errno == ECONNRESET) | |
1578 | len = -errno; | |
1579 | return len; | |
1580 | } else { | |
1581 | ERR("incorrect message size: %zd\n", len); | |
1582 | return len; | |
1583 | } | |
1584 | } | |
1585 | } | |
ff517991 MD |
1586 | |
1587 | /* | |
1588 | * Set socket reciving timeout. | |
1589 | */ | |
1590 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1591 | { | |
1592 | int ret; | |
1593 | struct timeval tv; | |
1594 | ||
1595 | tv.tv_sec = msec / 1000; | |
1596 | tv.tv_usec = (msec * 1000 % 1000000); | |
1597 | ||
1598 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1599 | if (ret < 0) { | |
1600 | PERROR("setsockopt SO_RCVTIMEO"); | |
1601 | ret = -errno; | |
1602 | } | |
1603 | ||
1604 | return ret; | |
1605 | } | |
1606 | ||
1607 | /* | |
1608 | * Set socket sending timeout. | |
1609 | */ | |
1610 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1611 | { | |
1612 | int ret; | |
1613 | struct timeval tv; | |
1614 | ||
1615 | tv.tv_sec = msec / 1000; | |
1616 | tv.tv_usec = (msec * 1000) % 1000000; | |
1617 | ||
1618 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1619 | if (ret < 0) { | |
1620 | PERROR("setsockopt SO_SNDTIMEO"); | |
1621 | ret = -errno; | |
1622 | } | |
1623 | ||
1624 | return ret; | |
1625 | } |