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. | |
110 | */ | |
11ba4bcb | 111 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
67c5b804 | 112 | if (fd < 0) { |
32ce8569 | 113 | PERROR("socket"); |
7bc53e94 | 114 | ret = -errno; |
67c5b804 MD |
115 | goto error; |
116 | } | |
451d66b2 MD |
117 | if (timeout >= 0) { |
118 | /* Give at least 10ms. */ | |
119 | if (timeout < 10) | |
120 | timeout = 10; | |
121 | ret = ustcomm_setsockopt_snd_timeout(fd, timeout); | |
122 | if (ret < 0) { | |
123 | WARN("Error setting connect socket send timeout"); | |
124 | } | |
125 | } | |
11ba4bcb MD |
126 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); |
127 | if (ret < 0) { | |
32ce8569 | 128 | PERROR("fcntl"); |
7bc53e94 | 129 | ret = -errno; |
11ba4bcb MD |
130 | goto error_fcntl; |
131 | } | |
67c5b804 MD |
132 | |
133 | memset(&sun, 0, sizeof(sun)); | |
134 | sun.sun_family = AF_UNIX; | |
135 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
136 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
137 | ||
138 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
139 | if (ret < 0) { | |
140 | /* | |
0b9aa170 MD |
141 | * Don't print message on connect ENOENT error, because |
142 | * connect is used in normal execution to detect if | |
143 | * sessiond is alive. ENOENT is when the unix socket | |
144 | * file does not exist, and ECONNREFUSED is when the | |
145 | * file exists but no sessiond is listening. | |
67c5b804 | 146 | */ |
0b9aa170 | 147 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 148 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 149 | PERROR("connect"); |
7bc53e94 | 150 | ret = -errno; |
8cf811d3 MD |
151 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
152 | ret = -EPIPE; | |
67c5b804 MD |
153 | goto error_connect; |
154 | } | |
155 | ||
156 | return fd; | |
157 | ||
158 | error_connect: | |
11ba4bcb | 159 | error_fcntl: |
7bc53e94 MD |
160 | { |
161 | int closeret; | |
162 | ||
163 | closeret = close(fd); | |
164 | if (closeret) | |
32ce8569 | 165 | PERROR("close"); |
7bc53e94 | 166 | } |
67c5b804 MD |
167 | error: |
168 | return ret; | |
169 | } | |
170 | ||
171 | /* | |
74d81a6c | 172 | * ustcomm_accept_unix_sock |
67c5b804 | 173 | * |
74d81a6c MD |
174 | * Do an accept(2) on the sock and return the |
175 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 176 | */ |
57773204 | 177 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
178 | { |
179 | int new_fd; | |
180 | struct sockaddr_un sun; | |
181 | socklen_t len = 0; | |
182 | ||
183 | /* Blocking call */ | |
184 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
185 | if (new_fd < 0) { | |
b869b5ae MD |
186 | if (errno != ECONNABORTED) |
187 | PERROR("accept"); | |
188 | new_fd = -errno; | |
189 | if (new_fd == -ECONNABORTED) | |
190 | new_fd = -EPIPE; | |
67c5b804 | 191 | } |
67c5b804 | 192 | return new_fd; |
67c5b804 MD |
193 | } |
194 | ||
195 | /* | |
74d81a6c | 196 | * ustcomm_create_unix_sock |
67c5b804 | 197 | * |
74d81a6c MD |
198 | * Creates a AF_UNIX local socket using pathname |
199 | * bind the socket upon creation and return the fd. | |
67c5b804 | 200 | */ |
57773204 | 201 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
202 | { |
203 | struct sockaddr_un sun; | |
7bc53e94 | 204 | int fd, ret; |
67c5b804 MD |
205 | |
206 | /* Create server socket */ | |
207 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 208 | PERROR("socket"); |
7bc53e94 | 209 | ret = -errno; |
67c5b804 MD |
210 | goto error; |
211 | } | |
212 | ||
213 | memset(&sun, 0, sizeof(sun)); | |
214 | sun.sun_family = AF_UNIX; | |
215 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
216 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
217 | ||
218 | /* Unlink the old file if present */ | |
219 | (void) unlink(pathname); | |
220 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
221 | if (ret < 0) { | |
32ce8569 | 222 | PERROR("bind"); |
7bc53e94 MD |
223 | ret = -errno; |
224 | goto error_close; | |
67c5b804 MD |
225 | } |
226 | ||
227 | return fd; | |
228 | ||
7bc53e94 MD |
229 | error_close: |
230 | { | |
231 | int closeret; | |
232 | ||
233 | closeret = close(fd); | |
234 | if (closeret) { | |
32ce8569 | 235 | PERROR("close"); |
7bc53e94 MD |
236 | } |
237 | } | |
67c5b804 MD |
238 | error: |
239 | return ret; | |
240 | } | |
241 | ||
242 | /* | |
74d81a6c | 243 | * ustcomm_listen_unix_sock |
67c5b804 | 244 | * |
74d81a6c | 245 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 246 | */ |
57773204 | 247 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
248 | { |
249 | int ret; | |
250 | ||
e41474be | 251 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 252 | if (ret < 0) { |
7bc53e94 | 253 | ret = -errno; |
32ce8569 | 254 | PERROR("listen"); |
67c5b804 MD |
255 | } |
256 | ||
257 | return ret; | |
258 | } | |
259 | ||
260 | /* | |
74d81a6c MD |
261 | * ustcomm_close_unix_sock |
262 | * | |
263 | * Shutdown cleanly a unix socket. | |
6548fca4 MD |
264 | * |
265 | * Handles fd tracker internally. | |
74d81a6c MD |
266 | */ |
267 | int ustcomm_close_unix_sock(int sock) | |
268 | { | |
269 | int ret; | |
270 | ||
6548fca4 | 271 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 272 | ret = close(sock); |
6548fca4 MD |
273 | if (!ret) { |
274 | lttng_ust_delete_fd_from_tracker(sock); | |
275 | } else { | |
32ce8569 | 276 | PERROR("close"); |
74d81a6c MD |
277 | ret = -errno; |
278 | } | |
6548fca4 | 279 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
280 | |
281 | return ret; | |
282 | } | |
283 | ||
284 | /* | |
285 | * ustcomm_recv_unix_sock | |
67c5b804 | 286 | * |
74d81a6c MD |
287 | * Receive data of size len in put that data into |
288 | * the buf param. Using recvmsg API. | |
289 | * Return the size of received data. | |
290 | * Return 0 on orderly shutdown. | |
67c5b804 | 291 | */ |
57773204 | 292 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 293 | { |
913b87f1 | 294 | struct msghdr msg; |
67c5b804 | 295 | struct iovec iov[1]; |
89c5b6ec MD |
296 | ssize_t ret = -1; |
297 | size_t len_last; | |
67c5b804 | 298 | |
913b87f1 MD |
299 | memset(&msg, 0, sizeof(msg)); |
300 | ||
67c5b804 MD |
301 | iov[0].iov_base = buf; |
302 | iov[0].iov_len = len; | |
303 | msg.msg_iov = iov; | |
304 | msg.msg_iovlen = 1; | |
305 | ||
7e3cfcbe | 306 | do { |
89c5b6ec | 307 | len_last = iov[0].iov_len; |
7e3cfcbe | 308 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
309 | if (ret > 0) { |
310 | iov[0].iov_base += ret; | |
311 | iov[0].iov_len -= ret; | |
312 | assert(ret <= len_last); | |
313 | } | |
314 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
315 | |
316 | if (ret < 0) { | |
317 | int shutret; | |
318 | ||
8cf811d3 | 319 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 320 | PERROR("recvmsg"); |
7bc53e94 | 321 | ret = -errno; |
8cf811d3 | 322 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 323 | ret = -EPIPE; |
7bc53e94 MD |
324 | |
325 | shutret = shutdown(sock, SHUT_RDWR); | |
326 | if (shutret) | |
32ce8569 | 327 | ERR("Socket shutdown error"); |
89c5b6ec MD |
328 | } else if (ret > 0) { |
329 | ret = len; | |
67c5b804 | 330 | } |
89c5b6ec | 331 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
332 | |
333 | return ret; | |
334 | } | |
335 | ||
336 | /* | |
74d81a6c | 337 | * ustcomm_send_unix_sock |
67c5b804 | 338 | * |
74d81a6c MD |
339 | * Send buf data of size len. Using sendmsg API. |
340 | * Return the size of sent data. | |
67c5b804 | 341 | */ |
32ce8569 | 342 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 343 | { |
913b87f1 | 344 | struct msghdr msg; |
67c5b804 | 345 | struct iovec iov[1]; |
7bc53e94 | 346 | ssize_t ret; |
67c5b804 | 347 | |
913b87f1 MD |
348 | memset(&msg, 0, sizeof(msg)); |
349 | ||
32ce8569 | 350 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
351 | iov[0].iov_len = len; |
352 | msg.msg_iov = iov; | |
353 | msg.msg_iovlen = 1; | |
354 | ||
1ea11eab MD |
355 | /* |
356 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
357 | * libust, so libust does not receive an unhandled SIGPIPE or | |
358 | * SIGURG. The sessiond receiver side can be made more resilient | |
359 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
360 | * libust side. | |
361 | */ | |
51d9d699 MD |
362 | do { |
363 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
364 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
365 | |
366 | if (ret < 0) { | |
367 | int shutret; | |
368 | ||
74d81a6c | 369 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 370 | PERROR("sendmsg"); |
7bc53e94 | 371 | ret = -errno; |
b869b5ae MD |
372 | if (ret == -ECONNRESET) |
373 | ret = -EPIPE; | |
7bc53e94 MD |
374 | |
375 | shutret = shutdown(sock, SHUT_RDWR); | |
376 | if (shutret) | |
32ce8569 | 377 | ERR("Socket shutdown error"); |
67c5b804 MD |
378 | } |
379 | ||
380 | return ret; | |
381 | } | |
382 | ||
383 | /* | |
74d81a6c | 384 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 385 | * |
74d81a6c | 386 | * Returns the size of data sent, or negative error value. |
67c5b804 | 387 | */ |
74d81a6c | 388 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 389 | { |
913b87f1 | 390 | struct msghdr msg; |
67c5b804 MD |
391 | struct cmsghdr *cmptr; |
392 | struct iovec iov[1]; | |
393 | ssize_t ret = -1; | |
394 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
395 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 396 | char dummy = 0; |
67c5b804 | 397 | |
913b87f1 | 398 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 399 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 400 | |
74d81a6c MD |
401 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
402 | return -EINVAL; | |
67c5b804 MD |
403 | |
404 | msg.msg_control = (caddr_t)tmp; | |
405 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
406 | ||
407 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
408 | if (!cmptr) |
409 | return -EINVAL; | |
67c5b804 MD |
410 | cmptr->cmsg_level = SOL_SOCKET; |
411 | cmptr->cmsg_type = SCM_RIGHTS; | |
412 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
413 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
414 | /* Sum of the length of all control messages in the buffer: */ | |
415 | msg.msg_controllen = cmptr->cmsg_len; | |
416 | ||
74d81a6c MD |
417 | iov[0].iov_base = &dummy; |
418 | iov[0].iov_len = 1; | |
67c5b804 MD |
419 | msg.msg_iov = iov; |
420 | msg.msg_iovlen = 1; | |
421 | ||
51d9d699 | 422 | do { |
0dafcd63 | 423 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 424 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 425 | if (ret < 0) { |
74d81a6c MD |
426 | /* |
427 | * We consider EPIPE and ECONNRESET as expected. | |
428 | */ | |
429 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 430 | PERROR("sendmsg"); |
74d81a6c | 431 | } |
b869b5ae MD |
432 | ret = -errno; |
433 | if (ret == -ECONNRESET) | |
434 | ret = -EPIPE; | |
74d81a6c MD |
435 | } |
436 | return ret; | |
437 | } | |
7bc53e94 | 438 | |
74d81a6c MD |
439 | /* |
440 | * Recv a message accompanied by fd(s) from a unix socket. | |
441 | * | |
74d81a6c MD |
442 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
443 | * actually received in nb_fd. | |
444 | * Returns -EPIPE on orderly shutdown. | |
445 | */ | |
446 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
447 | { | |
448 | struct iovec iov[1]; | |
449 | ssize_t ret = 0; | |
450 | struct cmsghdr *cmsg; | |
451 | size_t sizeof_fds = nb_fd * sizeof(int); | |
452 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
453 | struct msghdr msg; | |
454 | char dummy; | |
7bc53e94 | 455 | |
74d81a6c | 456 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 457 | |
74d81a6c MD |
458 | /* Prepare to receive the structures */ |
459 | iov[0].iov_base = &dummy; | |
460 | iov[0].iov_len = 1; | |
461 | msg.msg_iov = iov; | |
462 | msg.msg_iovlen = 1; | |
463 | msg.msg_control = recv_fd; | |
464 | msg.msg_controllen = sizeof(recv_fd); | |
465 | ||
466 | do { | |
467 | ret = recvmsg(sock, &msg, 0); | |
468 | } while (ret < 0 && errno == EINTR); | |
469 | if (ret < 0) { | |
470 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 471 | PERROR("recvmsg fds"); |
74d81a6c | 472 | } |
8cf811d3 | 473 | ret = -errno; |
b869b5ae MD |
474 | if (ret == -ECONNRESET) |
475 | ret = -EPIPE; | |
74d81a6c MD |
476 | goto end; |
477 | } | |
478 | if (ret == 0) { | |
479 | /* orderly shutdown */ | |
480 | ret = -EPIPE; | |
481 | goto end; | |
482 | } | |
483 | if (ret != 1) { | |
32ce8569 | 484 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
485 | ret, 1); |
486 | goto end; | |
487 | } | |
488 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 489 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
490 | ret = -1; |
491 | goto end; | |
492 | } | |
493 | cmsg = CMSG_FIRSTHDR(&msg); | |
494 | if (!cmsg) { | |
32ce8569 | 495 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
496 | ret = -1; |
497 | goto end; | |
498 | } | |
499 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 500 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
501 | ret = -1; |
502 | goto end; | |
503 | } | |
504 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 505 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
506 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
507 | ret = -1; | |
508 | goto end; | |
509 | } | |
510 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); | |
6b32a5c3 | 511 | ret = nb_fd; |
74d81a6c | 512 | end: |
67c5b804 MD |
513 | return ret; |
514 | } | |
57773204 MD |
515 | |
516 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
517 | { | |
518 | ssize_t len; | |
519 | ||
520 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
521 | switch (len) { | |
522 | case sizeof(*lum): | |
57773204 | 523 | break; |
57773204 | 524 | default: |
7bc53e94 | 525 | if (len < 0) { |
7bc53e94 MD |
526 | return len; |
527 | } else { | |
32ce8569 | 528 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
529 | return -EINVAL; |
530 | } | |
57773204 MD |
531 | } |
532 | return 0; | |
533 | } | |
534 | ||
535 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
536 | uint32_t expected_handle, uint32_t expected_cmd) | |
537 | { | |
538 | ssize_t len; | |
539 | ||
540 | memset(lur, 0, sizeof(*lur)); | |
541 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
542 | switch (len) { | |
543 | case 0: /* orderly shutdown */ | |
74d81a6c | 544 | return -EPIPE; |
57773204 | 545 | case sizeof(*lur): |
5dafeeaa MD |
546 | { |
547 | int err = 0; | |
548 | ||
57773204 | 549 | if (lur->handle != expected_handle) { |
32ce8569 | 550 | ERR("Unexpected result message handle: " |
74d81a6c MD |
551 | "expected: %u vs received: %u\n", |
552 | expected_handle, lur->handle); | |
5dafeeaa | 553 | err = 1; |
57773204 | 554 | } |
57773204 | 555 | if (lur->cmd != expected_cmd) { |
32ce8569 | 556 | ERR("Unexpected result message command " |
74d81a6c MD |
557 | "expected: %u vs received: %u\n", |
558 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
559 | err = 1; |
560 | } | |
561 | if (err) { | |
57773204 | 562 | return -EINVAL; |
5dafeeaa MD |
563 | } else { |
564 | return lur->ret_code; | |
57773204 | 565 | } |
5dafeeaa | 566 | } |
57773204 | 567 | default: |
8cf811d3 | 568 | if (len >= 0) { |
32ce8569 | 569 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 570 | } |
8cf811d3 | 571 | return len; |
57773204 MD |
572 | } |
573 | } | |
574 | ||
575 | int ustcomm_send_app_cmd(int sock, | |
576 | struct ustcomm_ust_msg *lum, | |
577 | struct ustcomm_ust_reply *lur) | |
578 | { | |
579 | int ret; | |
580 | ||
581 | ret = ustcomm_send_app_msg(sock, lum); | |
582 | if (ret) | |
583 | return ret; | |
c354a72c MD |
584 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
585 | if (ret > 0) | |
586 | return -EIO; | |
587 | return ret; | |
57773204 MD |
588 | } |
589 | ||
57773204 | 590 | /* |
74d81a6c MD |
591 | * chan_data is allocated internally if this function returns the |
592 | * expected var_len. | |
57773204 | 593 | */ |
74d81a6c | 594 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
595 | void **_chan_data, uint64_t var_len, |
596 | int *_wakeup_fd) | |
57773204 | 597 | { |
74d81a6c | 598 | void *chan_data; |
ff0f5728 | 599 | ssize_t len, nr_fd; |
f5c453e9 | 600 | int wakeup_fd, ret; |
57773204 | 601 | |
74d81a6c MD |
602 | if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) { |
603 | len = -EINVAL; | |
604 | goto error_check; | |
57773204 | 605 | } |
74d81a6c MD |
606 | /* Receive variable length data */ |
607 | chan_data = zmalloc(var_len); | |
608 | if (!chan_data) { | |
609 | len = -ENOMEM; | |
610 | goto error_alloc; | |
57773204 | 611 | } |
74d81a6c MD |
612 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
613 | if (len != var_len) { | |
614 | goto error_recv; | |
57773204 | 615 | } |
ff0f5728 | 616 | /* recv wakeup fd */ |
6548fca4 | 617 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
618 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
619 | if (nr_fd <= 0) { | |
6548fca4 | 620 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
621 | if (nr_fd < 0) { |
622 | len = nr_fd; | |
623 | goto error_recv; | |
624 | } else { | |
625 | len = -EIO; | |
626 | goto error_recv; | |
627 | } | |
628 | } | |
f5c453e9 JR |
629 | |
630 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
631 | if (ret < 0) { | |
f5c453e9 JR |
632 | ret = close(wakeup_fd); |
633 | if (ret) { | |
634 | PERROR("close on wakeup_fd"); | |
635 | } | |
636 | len = -EIO; | |
20d1999d | 637 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
638 | goto error_recv; |
639 | } | |
640 | ||
641 | *_wakeup_fd = ret; | |
6548fca4 | 642 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 643 | |
74d81a6c MD |
644 | *_chan_data = chan_data; |
645 | return len; | |
646 | ||
647 | error_recv: | |
648 | free(chan_data); | |
649 | error_alloc: | |
650 | error_check: | |
651 | return len; | |
652 | } | |
7bc53e94 | 653 | |
d5fc3224 FD |
654 | ssize_t ustcomm_recv_trigger_notif_fd_from_sessiond(int sock, |
655 | int *_trigger_notif_fd) | |
656 | { | |
657 | ssize_t nr_fd; | |
658 | int trigger_notif_fd, ret; | |
659 | ||
660 | /* Receive trigger notification fd */ | |
661 | lttng_ust_lock_fd_tracker(); | |
662 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &trigger_notif_fd, 1); | |
663 | if (nr_fd <= 0) { | |
664 | lttng_ust_unlock_fd_tracker(); | |
665 | if (nr_fd < 0) { | |
666 | ret = nr_fd; | |
667 | goto error; | |
668 | } else { | |
669 | ret = -EIO; | |
670 | goto error; | |
671 | } | |
672 | } | |
673 | ||
674 | ret = lttng_ust_add_fd_to_tracker(trigger_notif_fd); | |
675 | if (ret < 0) { | |
676 | ret = close(trigger_notif_fd); | |
677 | if (ret) { | |
678 | PERROR("close on trigger notif fd"); | |
679 | } | |
680 | ret = -EIO; | |
681 | lttng_ust_unlock_fd_tracker(); | |
682 | goto error; | |
683 | } | |
684 | ||
685 | *_trigger_notif_fd = ret; | |
686 | lttng_ust_unlock_fd_tracker(); | |
687 | ||
688 | ret = nr_fd; | |
689 | ||
690 | error: | |
691 | return ret; | |
692 | } | |
693 | ||
74d81a6c MD |
694 | int ustcomm_recv_stream_from_sessiond(int sock, |
695 | uint64_t *memory_map_size, | |
696 | int *shm_fd, int *wakeup_fd) | |
697 | { | |
698 | ssize_t len; | |
699 | int ret; | |
700 | int fds[2]; | |
701 | ||
702 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 703 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
704 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
705 | if (len <= 0) { | |
6548fca4 | 706 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
707 | if (len < 0) { |
708 | ret = len; | |
709 | goto error; | |
710 | } else { | |
711 | ret = -EIO; | |
712 | goto error; | |
713 | } | |
7bc53e94 | 714 | } |
f5c453e9 JR |
715 | |
716 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
717 | if (ret < 0) { | |
f5c453e9 JR |
718 | ret = close(fds[0]); |
719 | if (ret) { | |
720 | PERROR("close on received shm_fd"); | |
721 | } | |
722 | ret = -EIO; | |
20d1999d | 723 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
724 | goto error; |
725 | } | |
726 | *shm_fd = ret; | |
727 | ||
728 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
729 | if (ret < 0) { | |
f5c453e9 JR |
730 | ret = close(*shm_fd); |
731 | if (ret) { | |
732 | PERROR("close on shm_fd"); | |
733 | } | |
734 | *shm_fd = -1; | |
735 | ret = close(fds[1]); | |
736 | if (ret) { | |
737 | PERROR("close on received wakeup_fd"); | |
738 | } | |
739 | ret = -EIO; | |
20d1999d | 740 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
741 | goto error; |
742 | } | |
743 | *wakeup_fd = ret; | |
6548fca4 | 744 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
745 | return 0; |
746 | ||
747 | error: | |
57773204 MD |
748 | return ret; |
749 | } | |
32ce8569 MD |
750 | |
751 | /* | |
752 | * Returns 0 on success, negative error value on error. | |
753 | */ | |
754 | int ustcomm_send_reg_msg(int sock, | |
755 | enum ustctl_socket_type type, | |
756 | uint32_t bits_per_long, | |
757 | uint32_t uint8_t_alignment, | |
758 | uint32_t uint16_t_alignment, | |
759 | uint32_t uint32_t_alignment, | |
760 | uint32_t uint64_t_alignment, | |
761 | uint32_t long_alignment) | |
762 | { | |
763 | ssize_t len; | |
764 | struct ustctl_reg_msg reg_msg; | |
765 | ||
766 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
767 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
768 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
769 | reg_msg.pid = getpid(); | |
770 | reg_msg.ppid = getppid(); | |
771 | reg_msg.uid = getuid(); | |
772 | reg_msg.gid = getgid(); | |
773 | reg_msg.bits_per_long = bits_per_long; | |
774 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
775 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
776 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
777 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
778 | reg_msg.long_alignment = long_alignment; | |
779 | reg_msg.socket_type = type; | |
780 | lttng_ust_getprocname(reg_msg.name); | |
781 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); | |
782 | ||
783 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
784 | if (len > 0 && len != sizeof(reg_msg)) | |
785 | return -EIO; | |
786 | if (len < 0) | |
787 | return len; | |
788 | return 0; | |
789 | } | |
790 | ||
53569322 MD |
791 | static |
792 | ssize_t count_one_type(const struct lttng_type *lt) | |
793 | { | |
794 | switch (lt->atype) { | |
795 | case atype_integer: | |
796 | case atype_float: | |
797 | case atype_string: | |
798 | case atype_enum: | |
799 | case atype_array: | |
800 | case atype_sequence: | |
801 | return 1; | |
802 | case atype_struct: | |
803 | //TODO: implement non-empty struct. | |
804 | return 1; | |
805 | case atype_dynamic: | |
806 | { | |
807 | const struct lttng_event_field *choices; | |
808 | size_t nr_choices; | |
809 | int ret; | |
810 | ||
811 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
812 | &choices); | |
813 | if (ret) | |
814 | return ret; | |
815 | /* | |
816 | * One field for enum, one field for variant, and | |
817 | * one field per choice. | |
818 | */ | |
819 | return count_fields_recursive(nr_choices, choices) + 2; | |
820 | } | |
821 | default: | |
822 | return -EINVAL; | |
823 | } | |
824 | return 0; | |
825 | } | |
826 | ||
827 | static | |
828 | ssize_t count_fields_recursive(size_t nr_fields, | |
829 | const struct lttng_event_field *lttng_fields) | |
830 | { | |
831 | int i; | |
832 | ssize_t ret, count = 0; | |
833 | ||
834 | for (i = 0; i < nr_fields; i++) { | |
835 | const struct lttng_event_field *lf; | |
836 | ||
837 | lf = <tng_fields[i]; | |
838 | /* skip 'nowrite' fields */ | |
839 | if (lf->nowrite) | |
840 | continue; | |
841 | ret = count_one_type(&lf->type); | |
842 | if (ret < 0) | |
843 | return ret; /* error */ | |
844 | count += ret; | |
845 | } | |
846 | return count; | |
847 | } | |
848 | ||
849 | static | |
850 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
851 | const struct lttng_ctx_field *lttng_fields) | |
852 | { | |
853 | int i; | |
854 | ssize_t ret, count = 0; | |
855 | ||
856 | for (i = 0; i < nr_fields; i++) { | |
857 | const struct lttng_event_field *lf; | |
858 | ||
859 | lf = <tng_fields[i].event_field; | |
860 | /* skip 'nowrite' fields */ | |
861 | if (lf->nowrite) | |
862 | continue; | |
863 | ret = count_one_type(&lf->type); | |
864 | if (ret < 0) | |
865 | return ret; /* error */ | |
866 | count += ret; | |
867 | } | |
868 | return count; | |
869 | } | |
870 | ||
7f2348b8 | 871 | static |
735ea6a8 | 872 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
873 | enum lttng_string_encodings le) |
874 | { | |
875 | switch (le) { | |
876 | case lttng_encode_none: | |
877 | *ue = ustctl_encode_none; | |
878 | break; | |
879 | case lttng_encode_UTF8: | |
880 | *ue = ustctl_encode_UTF8; | |
881 | break; | |
882 | case lttng_encode_ASCII: | |
883 | *ue = ustctl_encode_ASCII; | |
884 | break; | |
885 | default: | |
886 | return -EINVAL; | |
887 | } | |
888 | return 0; | |
889 | } | |
890 | ||
32ce8569 | 891 | static |
c785c634 MD |
892 | int serialize_integer_type(struct ustctl_integer_type *uit, |
893 | const struct lttng_integer_type *lit) | |
894 | { | |
973eac63 GAPG |
895 | int32_t encoding; |
896 | ||
c785c634 MD |
897 | uit->size = lit->size; |
898 | uit->signedness = lit->signedness; | |
899 | uit->reverse_byte_order = lit->reverse_byte_order; | |
900 | uit->base = lit->base; | |
973eac63 | 901 | if (serialize_string_encoding(&encoding, lit->encoding)) |
c785c634 | 902 | return -EINVAL; |
973eac63 | 903 | uit->encoding = encoding; |
c785c634 MD |
904 | uit->alignment = lit->alignment; |
905 | return 0; | |
906 | } | |
907 | ||
908 | static | |
909 | int serialize_basic_type(struct lttng_session *session, | |
910 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 911 | enum lttng_abstract_types atype, |
32ce8569 MD |
912 | union _ustctl_basic_type *ubt, |
913 | const union _lttng_basic_type *lbt) | |
914 | { | |
915 | switch (atype) { | |
916 | case atype_integer: | |
917 | { | |
c785c634 | 918 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 919 | return -EINVAL; |
2b213b16 | 920 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
921 | break; |
922 | } | |
923 | case atype_string: | |
924 | { | |
973eac63 GAPG |
925 | int32_t encoding; |
926 | ||
927 | if (serialize_string_encoding(&encoding, lbt->string.encoding)) | |
7f2348b8 | 928 | return -EINVAL; |
973eac63 | 929 | ubt->string.encoding = encoding; |
2b213b16 | 930 | *uatype = ustctl_atype_string; |
32ce8569 MD |
931 | break; |
932 | } | |
933 | case atype_float: | |
934 | { | |
935 | struct ustctl_float_type *uft; | |
936 | const struct lttng_float_type *lft; | |
937 | ||
938 | uft = &ubt->_float; | |
939 | lft = &lbt->_float; | |
940 | uft->exp_dig = lft->exp_dig; | |
941 | uft->mant_dig = lft->mant_dig; | |
942 | uft->alignment = lft->alignment; | |
943 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 944 | *uatype = ustctl_atype_float; |
32ce8569 MD |
945 | break; |
946 | } | |
947 | case atype_enum: | |
c785c634 MD |
948 | { |
949 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
950 | LTTNG_UST_SYM_NAME_LEN); | |
951 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
952 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
953 | &lbt->enumeration.container_type)) | |
954 | return -EINVAL; | |
955 | if (session) { | |
956 | const struct lttng_enum *_enum; | |
957 | ||
b33b46f7 | 958 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
959 | if (!_enum) |
960 | return -EINVAL; | |
961 | ubt->enumeration.id = _enum->id; | |
962 | } else { | |
963 | ubt->enumeration.id = -1ULL; | |
964 | } | |
965 | *uatype = ustctl_atype_enum; | |
966 | break; | |
967 | } | |
32ce8569 MD |
968 | case atype_array: |
969 | case atype_sequence: | |
970 | default: | |
971 | return -EINVAL; | |
972 | } | |
973 | return 0; | |
32ce8569 MD |
974 | } |
975 | ||
976 | static | |
53569322 MD |
977 | int serialize_dynamic_type(struct lttng_session *session, |
978 | struct ustctl_field *fields, size_t *iter_output, | |
979 | const struct lttng_event_field *lf) | |
32ce8569 | 980 | { |
53569322 MD |
981 | const struct lttng_event_field *choices; |
982 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
983 | const struct lttng_type *tag_type; | |
984 | const struct lttng_event_field *tag_field_generic; | |
985 | struct lttng_event_field tag_field = { | |
986 | .name = tag_field_name, | |
987 | .nowrite = 0, | |
988 | }; | |
989 | struct ustctl_field *uf; | |
990 | size_t nr_choices, i; | |
32ce8569 MD |
991 | int ret; |
992 | ||
53569322 MD |
993 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
994 | tag_type = &tag_field_generic->type; | |
995 | ||
996 | /* Serialize enum field. */ | |
997 | strncpy(tag_field_name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
998 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
999 | strncat(tag_field_name, | |
1000 | "_tag", | |
1001 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
1002 | tag_field.type = *tag_type; | |
1003 | ret = serialize_one_field(session, fields, iter_output, | |
1004 | &tag_field); | |
1005 | if (ret) | |
1006 | return ret; | |
1007 | ||
1008 | /* Serialize variant field. */ | |
1009 | uf = &fields[*iter_output]; | |
1010 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
1011 | if (ret) | |
1012 | return ret; | |
1013 | ||
1014 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1015 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1016 | uf->type.atype = ustctl_atype_variant; | |
1017 | uf->type.u.variant.nr_choices = nr_choices; | |
1018 | strncpy(uf->type.u.variant.tag_name, | |
1019 | tag_field_name, | |
1020 | LTTNG_UST_SYM_NAME_LEN); | |
1021 | uf->type.u.variant.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1022 | (*iter_output)++; | |
1023 | ||
1024 | /* Serialize choice fields after variant. */ | |
1025 | for (i = 0; i < nr_choices; i++) { | |
1026 | ret = serialize_one_field(session, fields, | |
1027 | iter_output, &choices[i]); | |
1028 | if (ret) | |
1029 | return ret; | |
1030 | } | |
1031 | return 0; | |
1032 | } | |
1033 | ||
1034 | static | |
1035 | int serialize_one_field(struct lttng_session *session, | |
1036 | struct ustctl_field *fields, size_t *iter_output, | |
1037 | const struct lttng_event_field *lf) | |
1038 | { | |
1039 | const struct lttng_type *lt = &lf->type; | |
1040 | int ret; | |
1041 | ||
1042 | /* skip 'nowrite' fields */ | |
1043 | if (lf->nowrite) | |
1044 | return 0; | |
1045 | ||
32ce8569 MD |
1046 | switch (lt->atype) { |
1047 | case atype_integer: | |
1048 | case atype_float: | |
1049 | case atype_string: | |
c785c634 | 1050 | case atype_enum: |
53569322 MD |
1051 | { |
1052 | struct ustctl_field *uf = &fields[*iter_output]; | |
1053 | struct ustctl_type *ut = &uf->type; | |
973eac63 | 1054 | enum ustctl_abstract_types atype; |
53569322 MD |
1055 | |
1056 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1057 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
973eac63 | 1058 | ret = serialize_basic_type(session, &atype, lt->atype, |
32ce8569 MD |
1059 | &ut->u.basic, <->u.basic); |
1060 | if (ret) | |
1061 | return ret; | |
973eac63 | 1062 | ut->atype = atype; |
53569322 | 1063 | (*iter_output)++; |
32ce8569 | 1064 | break; |
53569322 | 1065 | } |
32ce8569 MD |
1066 | case atype_array: |
1067 | { | |
53569322 MD |
1068 | struct ustctl_field *uf = &fields[*iter_output]; |
1069 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1070 | struct ustctl_basic_type *ubt; |
1071 | const struct lttng_basic_type *lbt; | |
973eac63 | 1072 | enum ustctl_abstract_types atype; |
32ce8569 | 1073 | |
53569322 MD |
1074 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1075 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1076 | uf->type.atype = ustctl_atype_array; | |
32ce8569 MD |
1077 | ubt = &ut->u.array.elem_type; |
1078 | lbt = <->u.array.elem_type; | |
1079 | ut->u.array.length = lt->u.array.length; | |
973eac63 | 1080 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1081 | &ubt->u.basic, &lbt->u.basic); |
1082 | if (ret) | |
1083 | return -EINVAL; | |
973eac63 | 1084 | ubt->atype = atype; |
2b213b16 | 1085 | ut->atype = ustctl_atype_array; |
53569322 | 1086 | (*iter_output)++; |
32ce8569 MD |
1087 | break; |
1088 | } | |
1089 | case atype_sequence: | |
1090 | { | |
53569322 MD |
1091 | struct ustctl_field *uf = &fields[*iter_output]; |
1092 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1093 | struct ustctl_basic_type *ubt; |
1094 | const struct lttng_basic_type *lbt; | |
973eac63 | 1095 | enum ustctl_abstract_types atype; |
32ce8569 MD |
1096 | int ret; |
1097 | ||
53569322 MD |
1098 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1099 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1100 | uf->type.atype = ustctl_atype_sequence; | |
32ce8569 MD |
1101 | ubt = &ut->u.sequence.length_type; |
1102 | lbt = <->u.sequence.length_type; | |
973eac63 | 1103 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1104 | &ubt->u.basic, &lbt->u.basic); |
1105 | if (ret) | |
1106 | return -EINVAL; | |
973eac63 | 1107 | ubt->atype = atype; |
32ce8569 MD |
1108 | ubt = &ut->u.sequence.elem_type; |
1109 | lbt = <->u.sequence.elem_type; | |
973eac63 | 1110 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1111 | &ubt->u.basic, &lbt->u.basic); |
1112 | if (ret) | |
1113 | return -EINVAL; | |
973eac63 | 1114 | ubt->atype = atype; |
2b213b16 | 1115 | ut->atype = ustctl_atype_sequence; |
53569322 MD |
1116 | (*iter_output)++; |
1117 | break; | |
1118 | } | |
1119 | case atype_dynamic: | |
1120 | { | |
1121 | ret = serialize_dynamic_type(session, fields, iter_output, lf); | |
1122 | if (ret) | |
1123 | return -EINVAL; | |
1124 | break; | |
1125 | } | |
1126 | case atype_struct: | |
1127 | { | |
1128 | struct ustctl_field *uf = &fields[*iter_output]; | |
1129 | ||
1130 | /* | |
1131 | * TODO: add support for non-empty struct. | |
1132 | */ | |
1133 | if (lf->type.u._struct.nr_fields != 0) { | |
1134 | return -EINVAL; | |
1135 | } | |
1136 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1137 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1138 | uf->type.atype = ustctl_atype_struct; | |
1139 | uf->type.u._struct.nr_fields = 0; | |
1140 | (*iter_output)++; | |
32ce8569 MD |
1141 | break; |
1142 | } | |
32ce8569 MD |
1143 | default: |
1144 | return -EINVAL; | |
1145 | } | |
1146 | return 0; | |
1147 | } | |
1148 | ||
1149 | static | |
c785c634 MD |
1150 | int serialize_fields(struct lttng_session *session, |
1151 | size_t *_nr_write_fields, | |
32ce8569 MD |
1152 | struct ustctl_field **ustctl_fields, |
1153 | size_t nr_fields, | |
1154 | const struct lttng_event_field *lttng_fields) | |
1155 | { | |
1156 | struct ustctl_field *fields; | |
53569322 MD |
1157 | int ret; |
1158 | size_t i, iter_output = 0; | |
1159 | ssize_t nr_write_fields; | |
1160 | ||
1161 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1162 | if (nr_write_fields < 0) { | |
1163 | return (int) nr_write_fields; | |
1164 | } | |
32ce8569 | 1165 | |
53569322 | 1166 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1167 | if (!fields) |
1168 | return -ENOMEM; | |
1169 | ||
1170 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1171 | ret = serialize_one_field(session, fields, &iter_output, |
1172 | <tng_fields[i]); | |
32ce8569 MD |
1173 | if (ret) |
1174 | goto error_type; | |
32ce8569 MD |
1175 | } |
1176 | ||
1177 | *_nr_write_fields = nr_write_fields; | |
1178 | *ustctl_fields = fields; | |
1179 | return 0; | |
1180 | ||
1181 | error_type: | |
1182 | free(fields); | |
1183 | return ret; | |
1184 | } | |
1185 | ||
c785c634 MD |
1186 | static |
1187 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1188 | size_t nr_entries, | |
1189 | const struct lttng_enum_entry *lttng_entries) | |
1190 | { | |
1191 | struct ustctl_enum_entry *entries; | |
1192 | int i; | |
1193 | ||
1194 | /* Serialize the entries */ | |
1195 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1196 | if (!entries) | |
1197 | return -ENOMEM; | |
1198 | for (i = 0; i < nr_entries; i++) { | |
1199 | struct ustctl_enum_entry *uentry; | |
1200 | const struct lttng_enum_entry *lentry; | |
1201 | ||
1202 | uentry = &entries[i]; | |
1203 | lentry = <tng_entries[i]; | |
1204 | ||
a6f80644 MD |
1205 | uentry->start.value = lentry->start.value; |
1206 | uentry->start.signedness = lentry->start.signedness; | |
1207 | uentry->end.value = lentry->end.value; | |
1208 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1209 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1210 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1211 | |
1212 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1213 | uentry->u.extra.options |= | |
1214 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1215 | } | |
c785c634 MD |
1216 | } |
1217 | *_entries = entries; | |
1218 | return 0; | |
1219 | } | |
1220 | ||
83e43212 | 1221 | static |
53569322 MD |
1222 | int serialize_ctx_fields(struct lttng_session *session, |
1223 | size_t *_nr_write_fields, | |
83e43212 MD |
1224 | struct ustctl_field **ustctl_fields, |
1225 | size_t nr_fields, | |
1226 | const struct lttng_ctx_field *lttng_fields) | |
1227 | { | |
1228 | struct ustctl_field *fields; | |
53569322 MD |
1229 | int ret; |
1230 | size_t i, iter_output = 0; | |
1231 | ssize_t nr_write_fields; | |
83e43212 | 1232 | |
53569322 MD |
1233 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1234 | lttng_fields); | |
1235 | if (nr_write_fields < 0) { | |
1236 | return (int) nr_write_fields; | |
1237 | } | |
1238 | ||
1239 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1240 | if (!fields) |
1241 | return -ENOMEM; | |
1242 | ||
1243 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1244 | ret = serialize_one_field(session, fields, &iter_output, |
1245 | <tng_fields[i].event_field); | |
83e43212 MD |
1246 | if (ret) |
1247 | goto error_type; | |
83e43212 MD |
1248 | } |
1249 | ||
1250 | *_nr_write_fields = nr_write_fields; | |
1251 | *ustctl_fields = fields; | |
1252 | return 0; | |
1253 | ||
1254 | error_type: | |
1255 | free(fields); | |
1256 | return ret; | |
1257 | } | |
1258 | ||
32ce8569 MD |
1259 | /* |
1260 | * Returns 0 on success, negative error value on error. | |
1261 | */ | |
1262 | int ustcomm_register_event(int sock, | |
c785c634 | 1263 | struct lttng_session *session, |
32ce8569 MD |
1264 | int session_objd, /* session descriptor */ |
1265 | int channel_objd, /* channel descriptor */ | |
1266 | const char *event_name, /* event name (input) */ | |
1267 | int loglevel, | |
1268 | const char *signature, /* event signature (input) */ | |
1269 | size_t nr_fields, /* fields */ | |
1270 | const struct lttng_event_field *lttng_fields, | |
1271 | const char *model_emf_uri, | |
1272 | uint32_t *id) /* event id (output) */ | |
1273 | { | |
1274 | ssize_t len; | |
1275 | struct { | |
1276 | struct ustcomm_notify_hdr header; | |
1277 | struct ustcomm_notify_event_msg m; | |
1278 | } msg; | |
1279 | struct { | |
1280 | struct ustcomm_notify_hdr header; | |
1281 | struct ustcomm_notify_event_reply r; | |
1282 | } reply; | |
1283 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1284 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1285 | size_t nr_write_fields = 0; |
1286 | int ret; | |
1287 | ||
1288 | memset(&msg, 0, sizeof(msg)); | |
1289 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1290 | msg.m.session_objd = session_objd; | |
1291 | msg.m.channel_objd = channel_objd; | |
1292 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1293 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1294 | msg.m.loglevel = loglevel; | |
1295 | signature_len = strlen(signature) + 1; | |
1296 | msg.m.signature_len = signature_len; | |
1297 | ||
1298 | /* Calculate fields len, serialize fields. */ | |
1299 | if (nr_fields > 0) { | |
c785c634 | 1300 | ret = serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1301 | nr_fields, lttng_fields); |
1302 | if (ret) | |
1303 | return ret; | |
1304 | } | |
1305 | ||
1306 | fields_len = sizeof(*fields) * nr_write_fields; | |
1307 | msg.m.fields_len = fields_len; | |
1308 | if (model_emf_uri) { | |
1309 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1310 | } else { | |
1311 | model_emf_uri_len = 0; | |
1312 | } | |
1313 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1314 | |
32ce8569 MD |
1315 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1316 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1317 | ret = -EIO; |
1318 | goto error_fields; | |
32ce8569 MD |
1319 | } |
1320 | if (len < 0) { | |
c785c634 MD |
1321 | ret = len; |
1322 | goto error_fields; | |
32ce8569 MD |
1323 | } |
1324 | ||
1325 | /* send signature */ | |
1326 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1327 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1328 | ret = -EIO; |
1329 | goto error_fields; | |
32ce8569 MD |
1330 | } |
1331 | if (len < 0) { | |
6b95617c MD |
1332 | ret = len; |
1333 | goto error_fields; | |
32ce8569 MD |
1334 | } |
1335 | ||
1336 | /* send fields */ | |
1337 | if (fields_len > 0) { | |
1338 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1339 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1340 | ret = -EIO; |
1341 | goto error_fields; | |
32ce8569 MD |
1342 | } |
1343 | if (len < 0) { | |
c785c634 MD |
1344 | ret = len; |
1345 | goto error_fields; | |
32ce8569 MD |
1346 | } |
1347 | } | |
6b95617c | 1348 | free(fields); |
32ce8569 MD |
1349 | |
1350 | if (model_emf_uri_len) { | |
1351 | /* send model_emf_uri */ | |
1352 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1353 | model_emf_uri_len); | |
c785c634 | 1354 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1355 | return -EIO; |
c785c634 MD |
1356 | } |
1357 | if (len < 0) { | |
6b95617c | 1358 | return len; |
c785c634 | 1359 | } |
32ce8569 MD |
1360 | } |
1361 | ||
1362 | /* receive reply */ | |
1363 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1364 | switch (len) { | |
1365 | case 0: /* orderly shutdown */ | |
1366 | return -EPIPE; | |
1367 | case sizeof(reply): | |
1368 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1369 | ERR("Unexpected result message command " | |
1370 | "expected: %u vs received: %u\n", | |
1371 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1372 | return -EINVAL; | |
1373 | } | |
1374 | if (reply.r.ret_code > 0) | |
1375 | return -EINVAL; | |
1376 | if (reply.r.ret_code < 0) | |
1377 | return reply.r.ret_code; | |
1378 | *id = reply.r.event_id; | |
1379 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1380 | event_name, reply.r.ret_code, reply.r.event_id); | |
1381 | return 0; | |
1382 | default: | |
1383 | if (len < 0) { | |
1384 | /* Transport level error */ | |
1385 | if (errno == EPIPE || errno == ECONNRESET) | |
1386 | len = -errno; | |
1387 | return len; | |
1388 | } else { | |
1389 | ERR("incorrect message size: %zd\n", len); | |
1390 | return len; | |
1391 | } | |
1392 | } | |
6b95617c | 1393 | /* Unreached. */ |
c785c634 | 1394 | |
6b95617c | 1395 | /* Error path only. */ |
c785c634 MD |
1396 | error_fields: |
1397 | free(fields); | |
1398 | return ret; | |
1399 | } | |
1400 | ||
1401 | /* | |
1402 | * Returns 0 on success, negative error value on error. | |
1403 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1404 | */ | |
1405 | int ustcomm_register_enum(int sock, | |
1406 | int session_objd, /* session descriptor */ | |
1407 | const char *enum_name, /* enum name (input) */ | |
1408 | size_t nr_entries, /* entries */ | |
1409 | const struct lttng_enum_entry *lttng_entries, | |
1410 | uint64_t *id) | |
1411 | { | |
1412 | ssize_t len; | |
1413 | struct { | |
1414 | struct ustcomm_notify_hdr header; | |
1415 | struct ustcomm_notify_enum_msg m; | |
1416 | } msg; | |
1417 | struct { | |
1418 | struct ustcomm_notify_hdr header; | |
1419 | struct ustcomm_notify_enum_reply r; | |
1420 | } reply; | |
1421 | size_t entries_len; | |
1422 | struct ustctl_enum_entry *entries = NULL; | |
1423 | int ret; | |
1424 | ||
1425 | memset(&msg, 0, sizeof(msg)); | |
1426 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1427 | msg.m.session_objd = session_objd; | |
1428 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1429 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1430 | ||
1431 | /* Calculate entries len, serialize entries. */ | |
1432 | if (nr_entries > 0) { | |
1433 | ret = serialize_entries(&entries, | |
1434 | nr_entries, lttng_entries); | |
1435 | if (ret) | |
1436 | return ret; | |
1437 | } | |
1438 | ||
1439 | entries_len = sizeof(*entries) * nr_entries; | |
1440 | msg.m.entries_len = entries_len; | |
1441 | ||
1442 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1443 | if (len > 0 && len != sizeof(msg)) { | |
1444 | ret = -EIO; | |
1445 | goto error_entries; | |
1446 | } | |
1447 | if (len < 0) { | |
1448 | ret = len; | |
1449 | goto error_entries; | |
1450 | } | |
1451 | ||
1452 | /* send entries */ | |
1453 | if (entries_len > 0) { | |
1454 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1455 | if (len > 0 && len != entries_len) { | |
1456 | ret = -EIO; | |
1457 | goto error_entries; | |
1458 | } | |
1459 | if (len < 0) { | |
1460 | ret = len; | |
1461 | goto error_entries; | |
1462 | } | |
1463 | } | |
1464 | free(entries); | |
1465 | entries = NULL; | |
1466 | ||
1467 | /* receive reply */ | |
1468 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1469 | switch (len) { | |
1470 | case 0: /* orderly shutdown */ | |
1471 | return -EPIPE; | |
1472 | case sizeof(reply): | |
1473 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1474 | ERR("Unexpected result message command " | |
1475 | "expected: %u vs received: %u\n", | |
1476 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1477 | return -EINVAL; | |
1478 | } | |
1479 | if (reply.r.ret_code > 0) | |
1480 | return -EINVAL; | |
1481 | if (reply.r.ret_code < 0) | |
1482 | return reply.r.ret_code; | |
1483 | *id = reply.r.enum_id; | |
1484 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1485 | enum_name, reply.r.ret_code); | |
1486 | return 0; | |
1487 | default: | |
1488 | if (len < 0) { | |
1489 | /* Transport level error */ | |
1490 | if (errno == EPIPE || errno == ECONNRESET) | |
1491 | len = -errno; | |
1492 | return len; | |
1493 | } else { | |
1494 | ERR("incorrect message size: %zd\n", len); | |
1495 | return len; | |
1496 | } | |
1497 | } | |
1498 | return ret; | |
1499 | ||
1500 | error_entries: | |
1501 | free(entries); | |
1502 | return ret; | |
32ce8569 MD |
1503 | } |
1504 | ||
1505 | /* | |
1506 | * Returns 0 on success, negative error value on error. | |
1507 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1508 | */ | |
1509 | int ustcomm_register_channel(int sock, | |
53569322 | 1510 | struct lttng_session *session, |
32ce8569 MD |
1511 | int session_objd, /* session descriptor */ |
1512 | int channel_objd, /* channel descriptor */ | |
1513 | size_t nr_ctx_fields, | |
83e43212 | 1514 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1515 | uint32_t *chan_id, /* channel id (output) */ |
1516 | int *header_type) /* header type (output) */ | |
1517 | { | |
1518 | ssize_t len; | |
1519 | struct { | |
1520 | struct ustcomm_notify_hdr header; | |
1521 | struct ustcomm_notify_channel_msg m; | |
1522 | } msg; | |
1523 | struct { | |
1524 | struct ustcomm_notify_hdr header; | |
1525 | struct ustcomm_notify_channel_reply r; | |
1526 | } reply; | |
1527 | size_t fields_len; | |
83e43212 | 1528 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1529 | int ret; |
1530 | size_t nr_write_fields = 0; | |
1531 | ||
1532 | memset(&msg, 0, sizeof(msg)); | |
1533 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1534 | msg.m.session_objd = session_objd; | |
1535 | msg.m.channel_objd = channel_objd; | |
1536 | ||
1537 | /* Calculate fields len, serialize fields. */ | |
1538 | if (nr_ctx_fields > 0) { | |
53569322 | 1539 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1540 | nr_ctx_fields, ctx_fields); |
1541 | if (ret) | |
1542 | return ret; | |
1543 | } | |
1544 | ||
1545 | fields_len = sizeof(*fields) * nr_write_fields; | |
1546 | msg.m.ctx_fields_len = fields_len; | |
1547 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1548 | if (len > 0 && len != sizeof(msg)) { | |
1549 | free(fields); | |
1550 | return -EIO; | |
1551 | } | |
1552 | if (len < 0) { | |
1553 | free(fields); | |
1554 | return len; | |
1555 | } | |
1556 | ||
1557 | /* send fields */ | |
1558 | if (fields_len > 0) { | |
1559 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1560 | free(fields); | |
1561 | if (len > 0 && len != fields_len) { | |
1562 | return -EIO; | |
1563 | } | |
1564 | if (len < 0) { | |
1565 | return len; | |
1566 | } | |
17ea789c MD |
1567 | } else { |
1568 | free(fields); | |
32ce8569 MD |
1569 | } |
1570 | ||
1571 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1572 | switch (len) { | |
1573 | case 0: /* orderly shutdown */ | |
1574 | return -EPIPE; | |
1575 | case sizeof(reply): | |
1576 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1577 | ERR("Unexpected result message command " | |
1578 | "expected: %u vs received: %u\n", | |
1579 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1580 | return -EINVAL; | |
1581 | } | |
1582 | if (reply.r.ret_code > 0) | |
1583 | return -EINVAL; | |
1584 | if (reply.r.ret_code < 0) | |
1585 | return reply.r.ret_code; | |
1586 | *chan_id = reply.r.chan_id; | |
1587 | switch (reply.r.header_type) { | |
1588 | case 1: | |
1589 | case 2: | |
1590 | *header_type = reply.r.header_type; | |
1591 | break; | |
1592 | default: | |
1593 | ERR("Unexpected channel header type %u\n", | |
1594 | reply.r.header_type); | |
1595 | return -EINVAL; | |
1596 | } | |
1597 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1598 | reply.r.chan_id, reply.r.header_type); | |
1599 | return 0; | |
1600 | default: | |
1601 | if (len < 0) { | |
1602 | /* Transport level error */ | |
1603 | if (errno == EPIPE || errno == ECONNRESET) | |
1604 | len = -errno; | |
1605 | return len; | |
1606 | } else { | |
1607 | ERR("incorrect message size: %zd\n", len); | |
1608 | return len; | |
1609 | } | |
1610 | } | |
1611 | } | |
ff517991 MD |
1612 | |
1613 | /* | |
1614 | * Set socket reciving timeout. | |
1615 | */ | |
1616 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1617 | { | |
1618 | int ret; | |
1619 | struct timeval tv; | |
1620 | ||
1621 | tv.tv_sec = msec / 1000; | |
1622 | tv.tv_usec = (msec * 1000 % 1000000); | |
1623 | ||
1624 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1625 | if (ret < 0) { | |
1626 | PERROR("setsockopt SO_RCVTIMEO"); | |
1627 | ret = -errno; | |
1628 | } | |
1629 | ||
1630 | return ret; | |
1631 | } | |
1632 | ||
1633 | /* | |
1634 | * Set socket sending timeout. | |
1635 | */ | |
1636 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1637 | { | |
1638 | int ret; | |
1639 | struct timeval tv; | |
1640 | ||
1641 | tv.tv_sec = msec / 1000; | |
1642 | tv.tv_usec = (msec * 1000) % 1000000; | |
1643 | ||
1644 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1645 | if (ret < 0) { | |
1646 | PERROR("setsockopt SO_SNDTIMEO"); | |
1647 | ret = -errno; | |
1648 | } | |
1649 | ||
1650 | return ret; | |
1651 | } |