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 | ||
67c5b804 | 20 | #include <limits.h> |
fb31eb73 | 21 | #include <stdint.h> |
67c5b804 MD |
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); | |
218deb69 MD |
57 | static |
58 | int serialize_fields(struct lttng_session *session, | |
59 | struct ustctl_field *ustctl_fields, | |
60 | size_t *iter_output, size_t nr_lttng_fields, | |
61 | const struct lttng_event_field *lttng_fields); | |
53569322 | 62 | |
67c5b804 MD |
63 | /* |
64 | * Human readable error message. | |
65 | */ | |
57773204 | 66 | static const char *ustcomm_readable_code[] = { |
7bc53e94 MD |
67 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_OK) ] = "Success", |
68 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR) ] = "Unknown error", | |
69 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOENT) ] = "No entry", | |
64b2564e DG |
70 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXIST) ] = "Object already exists", |
71 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL) ] = "Invalid argument", | |
72 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PERM) ] = "Permission denied", | |
73 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOSYS) ] = "Not implemented", | |
74d81a6c | 74 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXITING) ] = "Process is exiting", |
32ce8569 MD |
75 | |
76 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_MAGIC) ] = "Invalid magic number", | |
77 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_SOCKET_TYPE) ] = "Invalid socket type", | |
78 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_UNSUP_MAJOR) ] = "Unsupported major version", | |
67c5b804 MD |
79 | }; |
80 | ||
81 | /* | |
7bc53e94 | 82 | * lttng_ust_strerror |
67c5b804 | 83 | * |
7bc53e94 MD |
84 | * Receives positive error value. |
85 | * Return ptr to string representing a human readable | |
86 | * error code from the ustcomm_return_code enum. | |
67c5b804 | 87 | */ |
7bc53e94 | 88 | const char *lttng_ust_strerror(int code) |
67c5b804 | 89 | { |
7bc53e94 MD |
90 | if (code == LTTNG_UST_OK) |
91 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
92 | if (code < LTTNG_UST_ERR) | |
93 | return strerror(code); | |
94 | if (code >= LTTNG_UST_ERR_NR) | |
95 | code = LTTNG_UST_ERR; | |
96 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
67c5b804 MD |
97 | } |
98 | ||
99 | /* | |
74d81a6c | 100 | * ustcomm_connect_unix_sock |
67c5b804 | 101 | * |
74d81a6c | 102 | * Connect to unix socket using the path name. |
6548fca4 MD |
103 | * |
104 | * Caller handles FD tracker. | |
67c5b804 | 105 | */ |
451d66b2 | 106 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
107 | { |
108 | struct sockaddr_un sun; | |
7bc53e94 | 109 | int fd, ret; |
67c5b804 | 110 | |
204d45df MD |
111 | /* |
112 | * libust threads require the close-on-exec flag for all | |
113 | * resources so it does not leak file descriptors upon exec. | |
6daf0c26 | 114 | * SOCK_CLOEXEC is not used since it is linux specific. |
204d45df | 115 | */ |
11ba4bcb | 116 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
67c5b804 | 117 | if (fd < 0) { |
32ce8569 | 118 | PERROR("socket"); |
7bc53e94 | 119 | ret = -errno; |
67c5b804 MD |
120 | goto error; |
121 | } | |
451d66b2 MD |
122 | if (timeout >= 0) { |
123 | /* Give at least 10ms. */ | |
124 | if (timeout < 10) | |
125 | timeout = 10; | |
126 | ret = ustcomm_setsockopt_snd_timeout(fd, timeout); | |
127 | if (ret < 0) { | |
128 | WARN("Error setting connect socket send timeout"); | |
129 | } | |
130 | } | |
11ba4bcb MD |
131 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); |
132 | if (ret < 0) { | |
32ce8569 | 133 | PERROR("fcntl"); |
7bc53e94 | 134 | ret = -errno; |
11ba4bcb MD |
135 | goto error_fcntl; |
136 | } | |
67c5b804 MD |
137 | |
138 | memset(&sun, 0, sizeof(sun)); | |
139 | sun.sun_family = AF_UNIX; | |
140 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
141 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
142 | ||
143 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
144 | if (ret < 0) { | |
145 | /* | |
0b9aa170 MD |
146 | * Don't print message on connect ENOENT error, because |
147 | * connect is used in normal execution to detect if | |
148 | * sessiond is alive. ENOENT is when the unix socket | |
149 | * file does not exist, and ECONNREFUSED is when the | |
150 | * file exists but no sessiond is listening. | |
67c5b804 | 151 | */ |
0b9aa170 | 152 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 153 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 154 | PERROR("connect"); |
7bc53e94 | 155 | ret = -errno; |
8cf811d3 MD |
156 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
157 | ret = -EPIPE; | |
67c5b804 MD |
158 | goto error_connect; |
159 | } | |
160 | ||
161 | return fd; | |
162 | ||
163 | error_connect: | |
11ba4bcb | 164 | error_fcntl: |
7bc53e94 MD |
165 | { |
166 | int closeret; | |
167 | ||
168 | closeret = close(fd); | |
169 | if (closeret) | |
32ce8569 | 170 | PERROR("close"); |
7bc53e94 | 171 | } |
67c5b804 MD |
172 | error: |
173 | return ret; | |
174 | } | |
175 | ||
176 | /* | |
74d81a6c | 177 | * ustcomm_accept_unix_sock |
67c5b804 | 178 | * |
74d81a6c MD |
179 | * Do an accept(2) on the sock and return the |
180 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 181 | */ |
57773204 | 182 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
183 | { |
184 | int new_fd; | |
185 | struct sockaddr_un sun; | |
186 | socklen_t len = 0; | |
187 | ||
188 | /* Blocking call */ | |
189 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
190 | if (new_fd < 0) { | |
b869b5ae MD |
191 | if (errno != ECONNABORTED) |
192 | PERROR("accept"); | |
193 | new_fd = -errno; | |
194 | if (new_fd == -ECONNABORTED) | |
195 | new_fd = -EPIPE; | |
67c5b804 | 196 | } |
67c5b804 | 197 | return new_fd; |
67c5b804 MD |
198 | } |
199 | ||
200 | /* | |
74d81a6c | 201 | * ustcomm_create_unix_sock |
67c5b804 | 202 | * |
74d81a6c MD |
203 | * Creates a AF_UNIX local socket using pathname |
204 | * bind the socket upon creation and return the fd. | |
67c5b804 | 205 | */ |
57773204 | 206 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
207 | { |
208 | struct sockaddr_un sun; | |
7bc53e94 | 209 | int fd, ret; |
67c5b804 MD |
210 | |
211 | /* Create server socket */ | |
212 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 213 | PERROR("socket"); |
7bc53e94 | 214 | ret = -errno; |
67c5b804 MD |
215 | goto error; |
216 | } | |
217 | ||
218 | memset(&sun, 0, sizeof(sun)); | |
219 | sun.sun_family = AF_UNIX; | |
220 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
221 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
222 | ||
223 | /* Unlink the old file if present */ | |
224 | (void) unlink(pathname); | |
225 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
226 | if (ret < 0) { | |
32ce8569 | 227 | PERROR("bind"); |
7bc53e94 MD |
228 | ret = -errno; |
229 | goto error_close; | |
67c5b804 MD |
230 | } |
231 | ||
232 | return fd; | |
233 | ||
7bc53e94 MD |
234 | error_close: |
235 | { | |
236 | int closeret; | |
237 | ||
238 | closeret = close(fd); | |
239 | if (closeret) { | |
32ce8569 | 240 | PERROR("close"); |
7bc53e94 MD |
241 | } |
242 | } | |
67c5b804 MD |
243 | error: |
244 | return ret; | |
245 | } | |
246 | ||
247 | /* | |
74d81a6c | 248 | * ustcomm_listen_unix_sock |
67c5b804 | 249 | * |
74d81a6c | 250 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 251 | */ |
57773204 | 252 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
253 | { |
254 | int ret; | |
255 | ||
e41474be | 256 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 257 | if (ret < 0) { |
7bc53e94 | 258 | ret = -errno; |
32ce8569 | 259 | PERROR("listen"); |
67c5b804 MD |
260 | } |
261 | ||
262 | return ret; | |
263 | } | |
264 | ||
265 | /* | |
74d81a6c MD |
266 | * ustcomm_close_unix_sock |
267 | * | |
268 | * Shutdown cleanly a unix socket. | |
6548fca4 MD |
269 | * |
270 | * Handles fd tracker internally. | |
74d81a6c MD |
271 | */ |
272 | int ustcomm_close_unix_sock(int sock) | |
273 | { | |
274 | int ret; | |
275 | ||
6548fca4 | 276 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 277 | ret = close(sock); |
6548fca4 MD |
278 | if (!ret) { |
279 | lttng_ust_delete_fd_from_tracker(sock); | |
280 | } else { | |
32ce8569 | 281 | PERROR("close"); |
74d81a6c MD |
282 | ret = -errno; |
283 | } | |
6548fca4 | 284 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
285 | |
286 | return ret; | |
287 | } | |
288 | ||
289 | /* | |
290 | * ustcomm_recv_unix_sock | |
67c5b804 | 291 | * |
74d81a6c MD |
292 | * Receive data of size len in put that data into |
293 | * the buf param. Using recvmsg API. | |
294 | * Return the size of received data. | |
295 | * Return 0 on orderly shutdown. | |
67c5b804 | 296 | */ |
57773204 | 297 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 298 | { |
913b87f1 | 299 | struct msghdr msg; |
67c5b804 | 300 | struct iovec iov[1]; |
89c5b6ec MD |
301 | ssize_t ret = -1; |
302 | size_t len_last; | |
67c5b804 | 303 | |
913b87f1 MD |
304 | memset(&msg, 0, sizeof(msg)); |
305 | ||
67c5b804 MD |
306 | iov[0].iov_base = buf; |
307 | iov[0].iov_len = len; | |
308 | msg.msg_iov = iov; | |
309 | msg.msg_iovlen = 1; | |
310 | ||
7e3cfcbe | 311 | do { |
89c5b6ec | 312 | len_last = iov[0].iov_len; |
7e3cfcbe | 313 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
314 | if (ret > 0) { |
315 | iov[0].iov_base += ret; | |
316 | iov[0].iov_len -= ret; | |
317 | assert(ret <= len_last); | |
318 | } | |
319 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
320 | |
321 | if (ret < 0) { | |
322 | int shutret; | |
323 | ||
8cf811d3 | 324 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 325 | PERROR("recvmsg"); |
7bc53e94 | 326 | ret = -errno; |
8cf811d3 | 327 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 328 | ret = -EPIPE; |
7bc53e94 MD |
329 | |
330 | shutret = shutdown(sock, SHUT_RDWR); | |
331 | if (shutret) | |
32ce8569 | 332 | ERR("Socket shutdown error"); |
89c5b6ec MD |
333 | } else if (ret > 0) { |
334 | ret = len; | |
67c5b804 | 335 | } |
89c5b6ec | 336 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
337 | |
338 | return ret; | |
339 | } | |
340 | ||
341 | /* | |
74d81a6c | 342 | * ustcomm_send_unix_sock |
67c5b804 | 343 | * |
74d81a6c MD |
344 | * Send buf data of size len. Using sendmsg API. |
345 | * Return the size of sent data. | |
67c5b804 | 346 | */ |
32ce8569 | 347 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 348 | { |
913b87f1 | 349 | struct msghdr msg; |
67c5b804 | 350 | struct iovec iov[1]; |
7bc53e94 | 351 | ssize_t ret; |
67c5b804 | 352 | |
913b87f1 MD |
353 | memset(&msg, 0, sizeof(msg)); |
354 | ||
32ce8569 | 355 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
356 | iov[0].iov_len = len; |
357 | msg.msg_iov = iov; | |
358 | msg.msg_iovlen = 1; | |
359 | ||
1ea11eab MD |
360 | /* |
361 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
362 | * libust, so libust does not receive an unhandled SIGPIPE or | |
363 | * SIGURG. The sessiond receiver side can be made more resilient | |
364 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
365 | * libust side. | |
366 | */ | |
51d9d699 MD |
367 | do { |
368 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
369 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
370 | |
371 | if (ret < 0) { | |
372 | int shutret; | |
373 | ||
74d81a6c | 374 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 375 | PERROR("sendmsg"); |
7bc53e94 | 376 | ret = -errno; |
b869b5ae MD |
377 | if (ret == -ECONNRESET) |
378 | ret = -EPIPE; | |
7bc53e94 MD |
379 | |
380 | shutret = shutdown(sock, SHUT_RDWR); | |
381 | if (shutret) | |
32ce8569 | 382 | ERR("Socket shutdown error"); |
67c5b804 MD |
383 | } |
384 | ||
385 | return ret; | |
386 | } | |
387 | ||
388 | /* | |
74d81a6c | 389 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 390 | * |
74d81a6c | 391 | * Returns the size of data sent, or negative error value. |
67c5b804 | 392 | */ |
74d81a6c | 393 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 394 | { |
913b87f1 | 395 | struct msghdr msg; |
67c5b804 MD |
396 | struct cmsghdr *cmptr; |
397 | struct iovec iov[1]; | |
398 | ssize_t ret = -1; | |
399 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
400 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 401 | char dummy = 0; |
67c5b804 | 402 | |
913b87f1 | 403 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 404 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 405 | |
74d81a6c MD |
406 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
407 | return -EINVAL; | |
67c5b804 MD |
408 | |
409 | msg.msg_control = (caddr_t)tmp; | |
410 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
411 | ||
412 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
413 | if (!cmptr) |
414 | return -EINVAL; | |
67c5b804 MD |
415 | cmptr->cmsg_level = SOL_SOCKET; |
416 | cmptr->cmsg_type = SCM_RIGHTS; | |
417 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
418 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
419 | /* Sum of the length of all control messages in the buffer: */ | |
420 | msg.msg_controllen = cmptr->cmsg_len; | |
421 | ||
74d81a6c MD |
422 | iov[0].iov_base = &dummy; |
423 | iov[0].iov_len = 1; | |
67c5b804 MD |
424 | msg.msg_iov = iov; |
425 | msg.msg_iovlen = 1; | |
426 | ||
51d9d699 | 427 | do { |
0dafcd63 | 428 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 429 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 430 | if (ret < 0) { |
74d81a6c MD |
431 | /* |
432 | * We consider EPIPE and ECONNRESET as expected. | |
433 | */ | |
434 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 435 | PERROR("sendmsg"); |
74d81a6c | 436 | } |
b869b5ae MD |
437 | ret = -errno; |
438 | if (ret == -ECONNRESET) | |
439 | ret = -EPIPE; | |
74d81a6c MD |
440 | } |
441 | return ret; | |
442 | } | |
7bc53e94 | 443 | |
74d81a6c MD |
444 | /* |
445 | * Recv a message accompanied by fd(s) from a unix socket. | |
446 | * | |
74d81a6c MD |
447 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
448 | * actually received in nb_fd. | |
449 | * Returns -EPIPE on orderly shutdown. | |
450 | */ | |
451 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
452 | { | |
453 | struct iovec iov[1]; | |
454 | ssize_t ret = 0; | |
455 | struct cmsghdr *cmsg; | |
456 | size_t sizeof_fds = nb_fd * sizeof(int); | |
457 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
458 | struct msghdr msg; | |
459 | char dummy; | |
6daf0c26 | 460 | int i; |
7bc53e94 | 461 | |
74d81a6c | 462 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 463 | |
74d81a6c MD |
464 | /* Prepare to receive the structures */ |
465 | iov[0].iov_base = &dummy; | |
466 | iov[0].iov_len = 1; | |
467 | msg.msg_iov = iov; | |
468 | msg.msg_iovlen = 1; | |
469 | msg.msg_control = recv_fd; | |
470 | msg.msg_controllen = sizeof(recv_fd); | |
471 | ||
472 | do { | |
473 | ret = recvmsg(sock, &msg, 0); | |
474 | } while (ret < 0 && errno == EINTR); | |
475 | if (ret < 0) { | |
476 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 477 | PERROR("recvmsg fds"); |
74d81a6c | 478 | } |
8cf811d3 | 479 | ret = -errno; |
b869b5ae MD |
480 | if (ret == -ECONNRESET) |
481 | ret = -EPIPE; | |
74d81a6c MD |
482 | goto end; |
483 | } | |
484 | if (ret == 0) { | |
485 | /* orderly shutdown */ | |
486 | ret = -EPIPE; | |
487 | goto end; | |
488 | } | |
489 | if (ret != 1) { | |
32ce8569 | 490 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
491 | ret, 1); |
492 | goto end; | |
493 | } | |
494 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 495 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
496 | ret = -1; |
497 | goto end; | |
498 | } | |
499 | cmsg = CMSG_FIRSTHDR(&msg); | |
500 | if (!cmsg) { | |
32ce8569 | 501 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
502 | ret = -1; |
503 | goto end; | |
504 | } | |
505 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 506 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
507 | ret = -1; |
508 | goto end; | |
509 | } | |
510 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 511 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
512 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
513 | ret = -1; | |
514 | goto end; | |
515 | } | |
6daf0c26 | 516 | |
74d81a6c | 517 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); |
6daf0c26 JR |
518 | |
519 | /* Set FD_CLOEXEC */ | |
520 | for (i = 0; i < nb_fd; i++) { | |
521 | ret = fcntl(fds[i], F_SETFD, FD_CLOEXEC); | |
522 | if (ret < 0) { | |
523 | PERROR("fcntl failed to set FD_CLOEXEC on fd %d", | |
524 | fds[i]); | |
525 | } | |
526 | } | |
527 | ||
6b32a5c3 | 528 | ret = nb_fd; |
74d81a6c | 529 | end: |
67c5b804 MD |
530 | return ret; |
531 | } | |
57773204 MD |
532 | |
533 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
534 | { | |
535 | ssize_t len; | |
536 | ||
537 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
538 | switch (len) { | |
539 | case sizeof(*lum): | |
57773204 | 540 | break; |
57773204 | 541 | default: |
7bc53e94 | 542 | if (len < 0) { |
7bc53e94 MD |
543 | return len; |
544 | } else { | |
32ce8569 | 545 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
546 | return -EINVAL; |
547 | } | |
57773204 MD |
548 | } |
549 | return 0; | |
550 | } | |
551 | ||
552 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
553 | uint32_t expected_handle, uint32_t expected_cmd) | |
554 | { | |
555 | ssize_t len; | |
556 | ||
557 | memset(lur, 0, sizeof(*lur)); | |
558 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
559 | switch (len) { | |
560 | case 0: /* orderly shutdown */ | |
74d81a6c | 561 | return -EPIPE; |
57773204 | 562 | case sizeof(*lur): |
5dafeeaa MD |
563 | { |
564 | int err = 0; | |
565 | ||
57773204 | 566 | if (lur->handle != expected_handle) { |
32ce8569 | 567 | ERR("Unexpected result message handle: " |
74d81a6c MD |
568 | "expected: %u vs received: %u\n", |
569 | expected_handle, lur->handle); | |
5dafeeaa | 570 | err = 1; |
57773204 | 571 | } |
57773204 | 572 | if (lur->cmd != expected_cmd) { |
32ce8569 | 573 | ERR("Unexpected result message command " |
74d81a6c MD |
574 | "expected: %u vs received: %u\n", |
575 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
576 | err = 1; |
577 | } | |
578 | if (err) { | |
57773204 | 579 | return -EINVAL; |
5dafeeaa MD |
580 | } else { |
581 | return lur->ret_code; | |
57773204 | 582 | } |
5dafeeaa | 583 | } |
57773204 | 584 | default: |
8cf811d3 | 585 | if (len >= 0) { |
32ce8569 | 586 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 587 | } |
8cf811d3 | 588 | return len; |
57773204 MD |
589 | } |
590 | } | |
591 | ||
592 | int ustcomm_send_app_cmd(int sock, | |
593 | struct ustcomm_ust_msg *lum, | |
594 | struct ustcomm_ust_reply *lur) | |
595 | { | |
596 | int ret; | |
597 | ||
598 | ret = ustcomm_send_app_msg(sock, lum); | |
599 | if (ret) | |
600 | return ret; | |
c354a72c MD |
601 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
602 | if (ret > 0) | |
603 | return -EIO; | |
604 | return ret; | |
57773204 MD |
605 | } |
606 | ||
57773204 | 607 | /* |
74d81a6c MD |
608 | * chan_data is allocated internally if this function returns the |
609 | * expected var_len. | |
57773204 | 610 | */ |
74d81a6c | 611 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
612 | void **_chan_data, uint64_t var_len, |
613 | int *_wakeup_fd) | |
57773204 | 614 | { |
74d81a6c | 615 | void *chan_data; |
ff0f5728 | 616 | ssize_t len, nr_fd; |
f5c453e9 | 617 | int wakeup_fd, ret; |
57773204 | 618 | |
74d81a6c MD |
619 | if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) { |
620 | len = -EINVAL; | |
621 | goto error_check; | |
57773204 | 622 | } |
74d81a6c MD |
623 | /* Receive variable length data */ |
624 | chan_data = zmalloc(var_len); | |
625 | if (!chan_data) { | |
626 | len = -ENOMEM; | |
627 | goto error_alloc; | |
57773204 | 628 | } |
74d81a6c MD |
629 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
630 | if (len != var_len) { | |
631 | goto error_recv; | |
57773204 | 632 | } |
ff0f5728 | 633 | /* recv wakeup fd */ |
6548fca4 | 634 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
635 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
636 | if (nr_fd <= 0) { | |
6548fca4 | 637 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
638 | if (nr_fd < 0) { |
639 | len = nr_fd; | |
640 | goto error_recv; | |
641 | } else { | |
642 | len = -EIO; | |
643 | goto error_recv; | |
644 | } | |
645 | } | |
f5c453e9 JR |
646 | |
647 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
648 | if (ret < 0) { | |
f5c453e9 JR |
649 | ret = close(wakeup_fd); |
650 | if (ret) { | |
651 | PERROR("close on wakeup_fd"); | |
652 | } | |
653 | len = -EIO; | |
20d1999d | 654 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
655 | goto error_recv; |
656 | } | |
657 | ||
658 | *_wakeup_fd = ret; | |
6548fca4 | 659 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 660 | |
74d81a6c MD |
661 | *_chan_data = chan_data; |
662 | return len; | |
663 | ||
664 | error_recv: | |
665 | free(chan_data); | |
666 | error_alloc: | |
667 | error_check: | |
668 | return len; | |
669 | } | |
7bc53e94 | 670 | |
d8d2416d FD |
671 | ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock, |
672 | int *_event_notifier_notif_fd) | |
673 | { | |
674 | ssize_t nr_fd; | |
675 | int event_notifier_notif_fd, ret; | |
676 | ||
677 | /* Receive event_notifier notification fd */ | |
678 | lttng_ust_lock_fd_tracker(); | |
679 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &event_notifier_notif_fd, 1); | |
680 | if (nr_fd <= 0) { | |
681 | lttng_ust_unlock_fd_tracker(); | |
682 | if (nr_fd < 0) { | |
683 | ret = nr_fd; | |
684 | goto error; | |
685 | } else { | |
686 | ret = -EIO; | |
687 | goto error; | |
688 | } | |
689 | } | |
690 | ||
691 | ret = lttng_ust_add_fd_to_tracker(event_notifier_notif_fd); | |
692 | if (ret < 0) { | |
693 | ret = close(event_notifier_notif_fd); | |
694 | if (ret) { | |
695 | PERROR("close on event_notifier notif fd"); | |
696 | } | |
697 | ret = -EIO; | |
698 | lttng_ust_unlock_fd_tracker(); | |
699 | goto error; | |
700 | } | |
701 | ||
702 | *_event_notifier_notif_fd = ret; | |
703 | lttng_ust_unlock_fd_tracker(); | |
704 | ||
705 | ret = nr_fd; | |
706 | ||
707 | error: | |
708 | return ret; | |
709 | } | |
710 | ||
74d81a6c MD |
711 | int ustcomm_recv_stream_from_sessiond(int sock, |
712 | uint64_t *memory_map_size, | |
713 | int *shm_fd, int *wakeup_fd) | |
714 | { | |
715 | ssize_t len; | |
716 | int ret; | |
717 | int fds[2]; | |
718 | ||
719 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 720 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
721 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
722 | if (len <= 0) { | |
6548fca4 | 723 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
724 | if (len < 0) { |
725 | ret = len; | |
726 | goto error; | |
727 | } else { | |
728 | ret = -EIO; | |
729 | goto error; | |
730 | } | |
7bc53e94 | 731 | } |
f5c453e9 JR |
732 | |
733 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
734 | if (ret < 0) { | |
f5c453e9 JR |
735 | ret = close(fds[0]); |
736 | if (ret) { | |
737 | PERROR("close on received shm_fd"); | |
738 | } | |
739 | ret = -EIO; | |
20d1999d | 740 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
741 | goto error; |
742 | } | |
743 | *shm_fd = ret; | |
744 | ||
745 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
746 | if (ret < 0) { | |
f5c453e9 JR |
747 | ret = close(*shm_fd); |
748 | if (ret) { | |
749 | PERROR("close on shm_fd"); | |
750 | } | |
751 | *shm_fd = -1; | |
752 | ret = close(fds[1]); | |
753 | if (ret) { | |
754 | PERROR("close on received wakeup_fd"); | |
755 | } | |
756 | ret = -EIO; | |
20d1999d | 757 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
758 | goto error; |
759 | } | |
760 | *wakeup_fd = ret; | |
6548fca4 | 761 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
762 | return 0; |
763 | ||
764 | error: | |
57773204 MD |
765 | return ret; |
766 | } | |
32ce8569 MD |
767 | |
768 | /* | |
769 | * Returns 0 on success, negative error value on error. | |
770 | */ | |
771 | int ustcomm_send_reg_msg(int sock, | |
772 | enum ustctl_socket_type type, | |
773 | uint32_t bits_per_long, | |
774 | uint32_t uint8_t_alignment, | |
775 | uint32_t uint16_t_alignment, | |
776 | uint32_t uint32_t_alignment, | |
777 | uint32_t uint64_t_alignment, | |
778 | uint32_t long_alignment) | |
779 | { | |
780 | ssize_t len; | |
781 | struct ustctl_reg_msg reg_msg; | |
782 | ||
783 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
784 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
785 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
786 | reg_msg.pid = getpid(); | |
787 | reg_msg.ppid = getppid(); | |
788 | reg_msg.uid = getuid(); | |
789 | reg_msg.gid = getgid(); | |
790 | reg_msg.bits_per_long = bits_per_long; | |
791 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
792 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
793 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
794 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
795 | reg_msg.long_alignment = long_alignment; | |
796 | reg_msg.socket_type = type; | |
0db3d6ee | 797 | lttng_pthread_getname_np(reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); |
32ce8569 MD |
798 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); |
799 | ||
800 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
801 | if (len > 0 && len != sizeof(reg_msg)) | |
802 | return -EIO; | |
803 | if (len < 0) | |
804 | return len; | |
805 | return 0; | |
806 | } | |
807 | ||
53569322 MD |
808 | static |
809 | ssize_t count_one_type(const struct lttng_type *lt) | |
810 | { | |
811 | switch (lt->atype) { | |
812 | case atype_integer: | |
813 | case atype_float: | |
814 | case atype_string: | |
815 | case atype_enum: | |
816 | case atype_array: | |
817 | case atype_sequence: | |
818 | return 1; | |
819 | case atype_struct: | |
218deb69 | 820 | return count_fields_recursive(lt->u.legacy._struct.nr_fields, |
cf22367f | 821 | lt->u.legacy._struct.fields) + 1; |
218deb69 MD |
822 | case atype_enum_nestable: |
823 | return count_one_type(lt->u.enum_nestable.container_type) + 1; | |
824 | case atype_array_nestable: | |
825 | return count_one_type(lt->u.array_nestable.elem_type) + 1; | |
826 | case atype_sequence_nestable: | |
827 | return count_one_type(lt->u.sequence_nestable.elem_type) + 1; | |
828 | case atype_struct_nestable: | |
829 | return count_fields_recursive(lt->u.struct_nestable.nr_fields, | |
cf22367f | 830 | lt->u.struct_nestable.fields) + 1; |
218deb69 | 831 | |
53569322 MD |
832 | case atype_dynamic: |
833 | { | |
834 | const struct lttng_event_field *choices; | |
835 | size_t nr_choices; | |
836 | int ret; | |
837 | ||
838 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
839 | &choices); | |
840 | if (ret) | |
841 | return ret; | |
842 | /* | |
cf22367f | 843 | * Two fields for enum, one field for variant, and |
53569322 MD |
844 | * one field per choice. |
845 | */ | |
cf22367f | 846 | return count_fields_recursive(nr_choices, choices) + 3; |
53569322 | 847 | } |
218deb69 | 848 | |
53569322 MD |
849 | default: |
850 | return -EINVAL; | |
851 | } | |
852 | return 0; | |
853 | } | |
854 | ||
855 | static | |
856 | ssize_t count_fields_recursive(size_t nr_fields, | |
857 | const struct lttng_event_field *lttng_fields) | |
858 | { | |
859 | int i; | |
860 | ssize_t ret, count = 0; | |
861 | ||
862 | for (i = 0; i < nr_fields; i++) { | |
863 | const struct lttng_event_field *lf; | |
864 | ||
865 | lf = <tng_fields[i]; | |
866 | /* skip 'nowrite' fields */ | |
867 | if (lf->nowrite) | |
868 | continue; | |
869 | ret = count_one_type(&lf->type); | |
870 | if (ret < 0) | |
871 | return ret; /* error */ | |
872 | count += ret; | |
873 | } | |
874 | return count; | |
875 | } | |
876 | ||
877 | static | |
878 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
879 | const struct lttng_ctx_field *lttng_fields) | |
880 | { | |
881 | int i; | |
882 | ssize_t ret, count = 0; | |
883 | ||
884 | for (i = 0; i < nr_fields; i++) { | |
885 | const struct lttng_event_field *lf; | |
886 | ||
887 | lf = <tng_fields[i].event_field; | |
888 | /* skip 'nowrite' fields */ | |
889 | if (lf->nowrite) | |
890 | continue; | |
891 | ret = count_one_type(&lf->type); | |
892 | if (ret < 0) | |
893 | return ret; /* error */ | |
894 | count += ret; | |
895 | } | |
896 | return count; | |
897 | } | |
898 | ||
7f2348b8 | 899 | static |
735ea6a8 | 900 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
901 | enum lttng_string_encodings le) |
902 | { | |
903 | switch (le) { | |
904 | case lttng_encode_none: | |
905 | *ue = ustctl_encode_none; | |
906 | break; | |
907 | case lttng_encode_UTF8: | |
908 | *ue = ustctl_encode_UTF8; | |
909 | break; | |
910 | case lttng_encode_ASCII: | |
911 | *ue = ustctl_encode_ASCII; | |
912 | break; | |
913 | default: | |
914 | return -EINVAL; | |
915 | } | |
916 | return 0; | |
917 | } | |
918 | ||
32ce8569 | 919 | static |
c785c634 MD |
920 | int serialize_integer_type(struct ustctl_integer_type *uit, |
921 | const struct lttng_integer_type *lit) | |
922 | { | |
973eac63 GAPG |
923 | int32_t encoding; |
924 | ||
c785c634 MD |
925 | uit->size = lit->size; |
926 | uit->signedness = lit->signedness; | |
927 | uit->reverse_byte_order = lit->reverse_byte_order; | |
928 | uit->base = lit->base; | |
973eac63 | 929 | if (serialize_string_encoding(&encoding, lit->encoding)) |
c785c634 | 930 | return -EINVAL; |
973eac63 | 931 | uit->encoding = encoding; |
c785c634 MD |
932 | uit->alignment = lit->alignment; |
933 | return 0; | |
934 | } | |
935 | ||
936 | static | |
937 | int serialize_basic_type(struct lttng_session *session, | |
938 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 939 | enum lttng_abstract_types atype, |
32ce8569 MD |
940 | union _ustctl_basic_type *ubt, |
941 | const union _lttng_basic_type *lbt) | |
942 | { | |
943 | switch (atype) { | |
944 | case atype_integer: | |
945 | { | |
c785c634 | 946 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 947 | return -EINVAL; |
2b213b16 | 948 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
949 | break; |
950 | } | |
951 | case atype_string: | |
952 | { | |
973eac63 GAPG |
953 | int32_t encoding; |
954 | ||
955 | if (serialize_string_encoding(&encoding, lbt->string.encoding)) | |
7f2348b8 | 956 | return -EINVAL; |
973eac63 | 957 | ubt->string.encoding = encoding; |
2b213b16 | 958 | *uatype = ustctl_atype_string; |
32ce8569 MD |
959 | break; |
960 | } | |
961 | case atype_float: | |
962 | { | |
963 | struct ustctl_float_type *uft; | |
964 | const struct lttng_float_type *lft; | |
965 | ||
966 | uft = &ubt->_float; | |
967 | lft = &lbt->_float; | |
968 | uft->exp_dig = lft->exp_dig; | |
969 | uft->mant_dig = lft->mant_dig; | |
970 | uft->alignment = lft->alignment; | |
971 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 972 | *uatype = ustctl_atype_float; |
32ce8569 MD |
973 | break; |
974 | } | |
975 | case atype_enum: | |
c785c634 MD |
976 | { |
977 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
978 | LTTNG_UST_SYM_NAME_LEN); | |
979 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
980 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
981 | &lbt->enumeration.container_type)) | |
982 | return -EINVAL; | |
983 | if (session) { | |
984 | const struct lttng_enum *_enum; | |
985 | ||
b33b46f7 | 986 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
987 | if (!_enum) |
988 | return -EINVAL; | |
989 | ubt->enumeration.id = _enum->id; | |
990 | } else { | |
991 | ubt->enumeration.id = -1ULL; | |
992 | } | |
993 | *uatype = ustctl_atype_enum; | |
994 | break; | |
995 | } | |
32ce8569 | 996 | case atype_array: |
218deb69 | 997 | case atype_array_nestable: |
32ce8569 | 998 | case atype_sequence: |
218deb69 MD |
999 | case atype_sequence_nestable: |
1000 | case atype_enum_nestable: | |
32ce8569 MD |
1001 | default: |
1002 | return -EINVAL; | |
1003 | } | |
1004 | return 0; | |
32ce8569 MD |
1005 | } |
1006 | ||
1007 | static | |
53569322 MD |
1008 | int serialize_dynamic_type(struct lttng_session *session, |
1009 | struct ustctl_field *fields, size_t *iter_output, | |
218deb69 | 1010 | const char *field_name) |
32ce8569 | 1011 | { |
53569322 MD |
1012 | const struct lttng_event_field *choices; |
1013 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
1014 | const struct lttng_type *tag_type; | |
1015 | const struct lttng_event_field *tag_field_generic; | |
1016 | struct lttng_event_field tag_field = { | |
1017 | .name = tag_field_name, | |
1018 | .nowrite = 0, | |
1019 | }; | |
1020 | struct ustctl_field *uf; | |
1021 | size_t nr_choices, i; | |
32ce8569 MD |
1022 | int ret; |
1023 | ||
53569322 MD |
1024 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
1025 | tag_type = &tag_field_generic->type; | |
1026 | ||
1027 | /* Serialize enum field. */ | |
218deb69 | 1028 | strncpy(tag_field_name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
1029 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1030 | strncat(tag_field_name, | |
1031 | "_tag", | |
1032 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
1033 | tag_field.type = *tag_type; | |
1034 | ret = serialize_one_field(session, fields, iter_output, | |
1035 | &tag_field); | |
1036 | if (ret) | |
1037 | return ret; | |
1038 | ||
1039 | /* Serialize variant field. */ | |
1040 | uf = &fields[*iter_output]; | |
1041 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
1042 | if (ret) | |
1043 | return ret; | |
1044 | ||
218deb69 | 1045 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
1046 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1047 | uf->type.atype = ustctl_atype_variant; | |
218deb69 MD |
1048 | uf->type.u.variant_nestable.nr_choices = nr_choices; |
1049 | strncpy(uf->type.u.variant_nestable.tag_name, | |
53569322 MD |
1050 | tag_field_name, |
1051 | LTTNG_UST_SYM_NAME_LEN); | |
218deb69 MD |
1052 | uf->type.u.variant_nestable.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1053 | uf->type.u.variant_nestable.alignment = 0; | |
53569322 MD |
1054 | (*iter_output)++; |
1055 | ||
1056 | /* Serialize choice fields after variant. */ | |
1057 | for (i = 0; i < nr_choices; i++) { | |
1058 | ret = serialize_one_field(session, fields, | |
1059 | iter_output, &choices[i]); | |
1060 | if (ret) | |
1061 | return ret; | |
1062 | } | |
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static | |
218deb69 | 1067 | int serialize_one_type(struct lttng_session *session, |
53569322 | 1068 | struct ustctl_field *fields, size_t *iter_output, |
218deb69 | 1069 | const char *field_name, const struct lttng_type *lt) |
53569322 | 1070 | { |
53569322 MD |
1071 | int ret; |
1072 | ||
218deb69 MD |
1073 | /* |
1074 | * Serializing a type (rather than a field) generates a ustctl_field | |
1075 | * entry with 0-length name. | |
1076 | */ | |
53569322 | 1077 | |
32ce8569 MD |
1078 | switch (lt->atype) { |
1079 | case atype_integer: | |
1080 | case atype_float: | |
1081 | case atype_string: | |
c785c634 | 1082 | case atype_enum: |
53569322 MD |
1083 | { |
1084 | struct ustctl_field *uf = &fields[*iter_output]; | |
1085 | struct ustctl_type *ut = &uf->type; | |
973eac63 | 1086 | enum ustctl_abstract_types atype; |
53569322 | 1087 | |
218deb69 MD |
1088 | if (field_name) { |
1089 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1090 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1091 | } else { | |
1092 | uf->name[0] = '\0'; | |
1093 | } | |
973eac63 | 1094 | ret = serialize_basic_type(session, &atype, lt->atype, |
218deb69 | 1095 | &ut->u.legacy.basic, <->u.legacy.basic); |
32ce8569 MD |
1096 | if (ret) |
1097 | return ret; | |
973eac63 | 1098 | ut->atype = atype; |
53569322 | 1099 | (*iter_output)++; |
32ce8569 | 1100 | break; |
53569322 | 1101 | } |
32ce8569 MD |
1102 | case atype_array: |
1103 | { | |
53569322 MD |
1104 | struct ustctl_field *uf = &fields[*iter_output]; |
1105 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1106 | struct ustctl_basic_type *ubt; |
1107 | const struct lttng_basic_type *lbt; | |
973eac63 | 1108 | enum ustctl_abstract_types atype; |
32ce8569 | 1109 | |
218deb69 MD |
1110 | if (field_name) { |
1111 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1112 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1113 | } else { | |
1114 | uf->name[0] = '\0'; | |
1115 | } | |
1116 | ut->atype = ustctl_atype_array; | |
1117 | ubt = &ut->u.legacy.array.elem_type; | |
1118 | lbt = <->u.legacy.array.elem_type; | |
1119 | ut->u.legacy.array.length = lt->u.legacy.array.length; | |
973eac63 | 1120 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1121 | &ubt->u.basic, &lbt->u.basic); |
1122 | if (ret) | |
1123 | return -EINVAL; | |
973eac63 | 1124 | ubt->atype = atype; |
53569322 | 1125 | (*iter_output)++; |
32ce8569 MD |
1126 | break; |
1127 | } | |
218deb69 MD |
1128 | case atype_array_nestable: |
1129 | { | |
1130 | struct ustctl_field *uf = &fields[*iter_output]; | |
1131 | struct ustctl_type *ut = &uf->type; | |
1132 | ||
1133 | if (field_name) { | |
1134 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1135 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1136 | } else { | |
1137 | uf->name[0] = '\0'; | |
1138 | } | |
1139 | ut->atype = ustctl_atype_array_nestable; | |
1140 | ut->u.array_nestable.length = lt->u.array_nestable.length; | |
1141 | ut->u.array_nestable.alignment = lt->u.array_nestable.alignment; | |
1142 | (*iter_output)++; | |
1143 | ||
1144 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1145 | lt->u.array_nestable.elem_type); | |
1146 | if (ret) | |
1147 | return -EINVAL; | |
1148 | break; | |
1149 | } | |
32ce8569 MD |
1150 | case atype_sequence: |
1151 | { | |
53569322 MD |
1152 | struct ustctl_field *uf = &fields[*iter_output]; |
1153 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1154 | struct ustctl_basic_type *ubt; |
1155 | const struct lttng_basic_type *lbt; | |
973eac63 | 1156 | enum ustctl_abstract_types atype; |
32ce8569 | 1157 | |
218deb69 MD |
1158 | if (field_name) { |
1159 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1160 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1161 | } else { | |
1162 | uf->name[0] = '\0'; | |
1163 | } | |
53569322 | 1164 | uf->type.atype = ustctl_atype_sequence; |
218deb69 MD |
1165 | ubt = &ut->u.legacy.sequence.length_type; |
1166 | lbt = <->u.legacy.sequence.length_type; | |
973eac63 | 1167 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1168 | &ubt->u.basic, &lbt->u.basic); |
1169 | if (ret) | |
1170 | return -EINVAL; | |
973eac63 | 1171 | ubt->atype = atype; |
218deb69 MD |
1172 | ubt = &ut->u.legacy.sequence.elem_type; |
1173 | lbt = <->u.legacy.sequence.elem_type; | |
973eac63 | 1174 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1175 | &ubt->u.basic, &lbt->u.basic); |
1176 | if (ret) | |
1177 | return -EINVAL; | |
973eac63 | 1178 | ubt->atype = atype; |
53569322 MD |
1179 | (*iter_output)++; |
1180 | break; | |
1181 | } | |
218deb69 MD |
1182 | case atype_sequence_nestable: |
1183 | { | |
1184 | struct ustctl_field *uf = &fields[*iter_output]; | |
1185 | struct ustctl_type *ut = &uf->type; | |
1186 | ||
1187 | if (field_name) { | |
1188 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1189 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1190 | } else { | |
1191 | uf->name[0] = '\0'; | |
1192 | } | |
1193 | ut->atype = ustctl_atype_sequence_nestable; | |
1194 | strncpy(ut->u.sequence_nestable.length_name, | |
1195 | lt->u.sequence_nestable.length_name, | |
1196 | LTTNG_UST_SYM_NAME_LEN); | |
1197 | ut->u.sequence_nestable.length_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1198 | ut->u.sequence_nestable.alignment = lt->u.sequence_nestable.alignment; | |
1199 | (*iter_output)++; | |
1200 | ||
1201 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1202 | lt->u.sequence_nestable.elem_type); | |
1203 | if (ret) | |
1204 | return -EINVAL; | |
1205 | break; | |
1206 | } | |
53569322 MD |
1207 | case atype_dynamic: |
1208 | { | |
218deb69 MD |
1209 | ret = serialize_dynamic_type(session, fields, iter_output, |
1210 | field_name); | |
53569322 MD |
1211 | if (ret) |
1212 | return -EINVAL; | |
1213 | break; | |
1214 | } | |
1215 | case atype_struct: | |
1216 | { | |
1217 | struct ustctl_field *uf = &fields[*iter_output]; | |
1218 | ||
218deb69 MD |
1219 | if (field_name) { |
1220 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1221 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1222 | } else { | |
1223 | uf->name[0] = '\0'; | |
53569322 | 1224 | } |
53569322 | 1225 | uf->type.atype = ustctl_atype_struct; |
218deb69 | 1226 | uf->type.u.legacy._struct.nr_fields = lt->u.legacy._struct.nr_fields; |
53569322 | 1227 | (*iter_output)++; |
218deb69 MD |
1228 | |
1229 | ret = serialize_fields(session, fields, iter_output, | |
1230 | lt->u.legacy._struct.nr_fields, | |
1231 | lt->u.legacy._struct.fields); | |
1232 | if (ret) | |
1233 | return -EINVAL; | |
1234 | break; | |
1235 | } | |
1236 | case atype_struct_nestable: | |
1237 | { | |
1238 | struct ustctl_field *uf = &fields[*iter_output]; | |
1239 | ||
1240 | if (field_name) { | |
1241 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1242 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1243 | } else { | |
1244 | uf->name[0] = '\0'; | |
1245 | } | |
1246 | uf->type.atype = ustctl_atype_struct_nestable; | |
1247 | uf->type.u.struct_nestable.nr_fields = lt->u.struct_nestable.nr_fields; | |
1248 | uf->type.u.struct_nestable.alignment = lt->u.struct_nestable.alignment; | |
1249 | (*iter_output)++; | |
1250 | ||
1251 | ret = serialize_fields(session, fields, iter_output, | |
1252 | lt->u.struct_nestable.nr_fields, | |
1253 | lt->u.struct_nestable.fields); | |
1254 | if (ret) | |
1255 | return -EINVAL; | |
1256 | break; | |
1257 | } | |
1258 | case atype_enum_nestable: | |
1259 | { | |
1260 | struct ustctl_field *uf = &fields[*iter_output]; | |
1261 | struct ustctl_type *ut = &uf->type; | |
1262 | ||
1263 | if (field_name) { | |
1264 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1265 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1266 | } else { | |
1267 | uf->name[0] = '\0'; | |
1268 | } | |
1269 | strncpy(ut->u.enum_nestable.name, lt->u.enum_nestable.desc->name, | |
1270 | LTTNG_UST_SYM_NAME_LEN); | |
1271 | ut->u.enum_nestable.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1272 | ut->atype = ustctl_atype_enum_nestable; | |
1273 | (*iter_output)++; | |
1274 | ||
1275 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1276 | lt->u.enum_nestable.container_type); | |
1277 | if (ret) | |
1278 | return -EINVAL; | |
1279 | if (session) { | |
1280 | const struct lttng_enum *_enum; | |
1281 | ||
1282 | _enum = lttng_ust_enum_get_from_desc(session, lt->u.enum_nestable.desc); | |
1283 | if (!_enum) | |
1284 | return -EINVAL; | |
1285 | ut->u.enum_nestable.id = _enum->id; | |
1286 | } else { | |
1287 | ut->u.enum_nestable.id = -1ULL; | |
1288 | } | |
32ce8569 MD |
1289 | break; |
1290 | } | |
32ce8569 MD |
1291 | default: |
1292 | return -EINVAL; | |
1293 | } | |
1294 | return 0; | |
1295 | } | |
1296 | ||
218deb69 MD |
1297 | static |
1298 | int serialize_one_field(struct lttng_session *session, | |
1299 | struct ustctl_field *fields, size_t *iter_output, | |
1300 | const struct lttng_event_field *lf) | |
1301 | { | |
1302 | /* skip 'nowrite' fields */ | |
1303 | if (lf->nowrite) | |
1304 | return 0; | |
1305 | ||
1306 | return serialize_one_type(session, fields, iter_output, lf->name, &lf->type); | |
1307 | } | |
1308 | ||
32ce8569 | 1309 | static |
c785c634 | 1310 | int serialize_fields(struct lttng_session *session, |
218deb69 MD |
1311 | struct ustctl_field *ustctl_fields, |
1312 | size_t *iter_output, size_t nr_lttng_fields, | |
1313 | const struct lttng_event_field *lttng_fields) | |
1314 | { | |
1315 | int ret; | |
1316 | size_t i; | |
1317 | ||
1318 | for (i = 0; i < nr_lttng_fields; i++) { | |
1319 | ret = serialize_one_field(session, ustctl_fields, | |
1320 | iter_output, <tng_fields[i]); | |
1321 | if (ret) | |
1322 | return ret; | |
1323 | } | |
1324 | return 0; | |
1325 | } | |
1326 | ||
1327 | static | |
1328 | int alloc_serialize_fields(struct lttng_session *session, | |
c785c634 | 1329 | size_t *_nr_write_fields, |
32ce8569 MD |
1330 | struct ustctl_field **ustctl_fields, |
1331 | size_t nr_fields, | |
1332 | const struct lttng_event_field *lttng_fields) | |
1333 | { | |
1334 | struct ustctl_field *fields; | |
53569322 | 1335 | int ret; |
218deb69 | 1336 | size_t iter_output = 0; |
53569322 MD |
1337 | ssize_t nr_write_fields; |
1338 | ||
1339 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1340 | if (nr_write_fields < 0) { | |
1341 | return (int) nr_write_fields; | |
1342 | } | |
32ce8569 | 1343 | |
53569322 | 1344 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1345 | if (!fields) |
1346 | return -ENOMEM; | |
1347 | ||
218deb69 MD |
1348 | ret = serialize_fields(session, fields, &iter_output, nr_fields, |
1349 | lttng_fields); | |
1350 | if (ret) | |
1351 | goto error_type; | |
32ce8569 MD |
1352 | |
1353 | *_nr_write_fields = nr_write_fields; | |
1354 | *ustctl_fields = fields; | |
1355 | return 0; | |
1356 | ||
1357 | error_type: | |
1358 | free(fields); | |
1359 | return ret; | |
1360 | } | |
1361 | ||
c785c634 MD |
1362 | static |
1363 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1364 | size_t nr_entries, | |
1365 | const struct lttng_enum_entry *lttng_entries) | |
1366 | { | |
1367 | struct ustctl_enum_entry *entries; | |
1368 | int i; | |
1369 | ||
1370 | /* Serialize the entries */ | |
1371 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1372 | if (!entries) | |
1373 | return -ENOMEM; | |
1374 | for (i = 0; i < nr_entries; i++) { | |
1375 | struct ustctl_enum_entry *uentry; | |
1376 | const struct lttng_enum_entry *lentry; | |
1377 | ||
1378 | uentry = &entries[i]; | |
1379 | lentry = <tng_entries[i]; | |
1380 | ||
a6f80644 MD |
1381 | uentry->start.value = lentry->start.value; |
1382 | uentry->start.signedness = lentry->start.signedness; | |
1383 | uentry->end.value = lentry->end.value; | |
1384 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1385 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1386 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1387 | |
1388 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1389 | uentry->u.extra.options |= | |
1390 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1391 | } | |
c785c634 MD |
1392 | } |
1393 | *_entries = entries; | |
1394 | return 0; | |
1395 | } | |
1396 | ||
83e43212 | 1397 | static |
53569322 MD |
1398 | int serialize_ctx_fields(struct lttng_session *session, |
1399 | size_t *_nr_write_fields, | |
83e43212 MD |
1400 | struct ustctl_field **ustctl_fields, |
1401 | size_t nr_fields, | |
1402 | const struct lttng_ctx_field *lttng_fields) | |
1403 | { | |
1404 | struct ustctl_field *fields; | |
53569322 MD |
1405 | int ret; |
1406 | size_t i, iter_output = 0; | |
1407 | ssize_t nr_write_fields; | |
83e43212 | 1408 | |
53569322 MD |
1409 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1410 | lttng_fields); | |
1411 | if (nr_write_fields < 0) { | |
1412 | return (int) nr_write_fields; | |
1413 | } | |
1414 | ||
1415 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1416 | if (!fields) |
1417 | return -ENOMEM; | |
1418 | ||
1419 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1420 | ret = serialize_one_field(session, fields, &iter_output, |
1421 | <tng_fields[i].event_field); | |
83e43212 MD |
1422 | if (ret) |
1423 | goto error_type; | |
83e43212 MD |
1424 | } |
1425 | ||
1426 | *_nr_write_fields = nr_write_fields; | |
1427 | *ustctl_fields = fields; | |
1428 | return 0; | |
1429 | ||
1430 | error_type: | |
1431 | free(fields); | |
1432 | return ret; | |
1433 | } | |
1434 | ||
32ce8569 MD |
1435 | /* |
1436 | * Returns 0 on success, negative error value on error. | |
1437 | */ | |
1438 | int ustcomm_register_event(int sock, | |
c785c634 | 1439 | struct lttng_session *session, |
32ce8569 MD |
1440 | int session_objd, /* session descriptor */ |
1441 | int channel_objd, /* channel descriptor */ | |
1442 | const char *event_name, /* event name (input) */ | |
1443 | int loglevel, | |
1444 | const char *signature, /* event signature (input) */ | |
1445 | size_t nr_fields, /* fields */ | |
1446 | const struct lttng_event_field *lttng_fields, | |
1447 | const char *model_emf_uri, | |
1448 | uint32_t *id) /* event id (output) */ | |
1449 | { | |
1450 | ssize_t len; | |
1451 | struct { | |
1452 | struct ustcomm_notify_hdr header; | |
1453 | struct ustcomm_notify_event_msg m; | |
1454 | } msg; | |
1455 | struct { | |
1456 | struct ustcomm_notify_hdr header; | |
1457 | struct ustcomm_notify_event_reply r; | |
1458 | } reply; | |
1459 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1460 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1461 | size_t nr_write_fields = 0; |
1462 | int ret; | |
1463 | ||
1464 | memset(&msg, 0, sizeof(msg)); | |
1465 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1466 | msg.m.session_objd = session_objd; | |
1467 | msg.m.channel_objd = channel_objd; | |
1468 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1469 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1470 | msg.m.loglevel = loglevel; | |
1471 | signature_len = strlen(signature) + 1; | |
1472 | msg.m.signature_len = signature_len; | |
1473 | ||
1474 | /* Calculate fields len, serialize fields. */ | |
1475 | if (nr_fields > 0) { | |
218deb69 | 1476 | ret = alloc_serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1477 | nr_fields, lttng_fields); |
1478 | if (ret) | |
1479 | return ret; | |
1480 | } | |
1481 | ||
1482 | fields_len = sizeof(*fields) * nr_write_fields; | |
1483 | msg.m.fields_len = fields_len; | |
1484 | if (model_emf_uri) { | |
1485 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1486 | } else { | |
1487 | model_emf_uri_len = 0; | |
1488 | } | |
1489 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1490 | |
32ce8569 MD |
1491 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1492 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1493 | ret = -EIO; |
1494 | goto error_fields; | |
32ce8569 MD |
1495 | } |
1496 | if (len < 0) { | |
c785c634 MD |
1497 | ret = len; |
1498 | goto error_fields; | |
32ce8569 MD |
1499 | } |
1500 | ||
1501 | /* send signature */ | |
1502 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1503 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1504 | ret = -EIO; |
1505 | goto error_fields; | |
32ce8569 MD |
1506 | } |
1507 | if (len < 0) { | |
6b95617c MD |
1508 | ret = len; |
1509 | goto error_fields; | |
32ce8569 MD |
1510 | } |
1511 | ||
1512 | /* send fields */ | |
1513 | if (fields_len > 0) { | |
1514 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1515 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1516 | ret = -EIO; |
1517 | goto error_fields; | |
32ce8569 MD |
1518 | } |
1519 | if (len < 0) { | |
c785c634 MD |
1520 | ret = len; |
1521 | goto error_fields; | |
32ce8569 MD |
1522 | } |
1523 | } | |
6b95617c | 1524 | free(fields); |
32ce8569 MD |
1525 | |
1526 | if (model_emf_uri_len) { | |
1527 | /* send model_emf_uri */ | |
1528 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1529 | model_emf_uri_len); | |
c785c634 | 1530 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1531 | return -EIO; |
c785c634 MD |
1532 | } |
1533 | if (len < 0) { | |
6b95617c | 1534 | return len; |
c785c634 | 1535 | } |
32ce8569 MD |
1536 | } |
1537 | ||
1538 | /* receive reply */ | |
1539 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1540 | switch (len) { | |
1541 | case 0: /* orderly shutdown */ | |
1542 | return -EPIPE; | |
1543 | case sizeof(reply): | |
1544 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1545 | ERR("Unexpected result message command " | |
1546 | "expected: %u vs received: %u\n", | |
1547 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1548 | return -EINVAL; | |
1549 | } | |
1550 | if (reply.r.ret_code > 0) | |
1551 | return -EINVAL; | |
1552 | if (reply.r.ret_code < 0) | |
1553 | return reply.r.ret_code; | |
1554 | *id = reply.r.event_id; | |
1555 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1556 | event_name, reply.r.ret_code, reply.r.event_id); | |
1557 | return 0; | |
1558 | default: | |
1559 | if (len < 0) { | |
1560 | /* Transport level error */ | |
1561 | if (errno == EPIPE || errno == ECONNRESET) | |
1562 | len = -errno; | |
1563 | return len; | |
1564 | } else { | |
1565 | ERR("incorrect message size: %zd\n", len); | |
1566 | return len; | |
1567 | } | |
1568 | } | |
6b95617c | 1569 | /* Unreached. */ |
c785c634 | 1570 | |
6b95617c | 1571 | /* Error path only. */ |
c785c634 MD |
1572 | error_fields: |
1573 | free(fields); | |
1574 | return ret; | |
1575 | } | |
1576 | ||
1577 | /* | |
1578 | * Returns 0 on success, negative error value on error. | |
1579 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1580 | */ | |
1581 | int ustcomm_register_enum(int sock, | |
1582 | int session_objd, /* session descriptor */ | |
1583 | const char *enum_name, /* enum name (input) */ | |
1584 | size_t nr_entries, /* entries */ | |
1585 | const struct lttng_enum_entry *lttng_entries, | |
1586 | uint64_t *id) | |
1587 | { | |
1588 | ssize_t len; | |
1589 | struct { | |
1590 | struct ustcomm_notify_hdr header; | |
1591 | struct ustcomm_notify_enum_msg m; | |
1592 | } msg; | |
1593 | struct { | |
1594 | struct ustcomm_notify_hdr header; | |
1595 | struct ustcomm_notify_enum_reply r; | |
1596 | } reply; | |
1597 | size_t entries_len; | |
1598 | struct ustctl_enum_entry *entries = NULL; | |
1599 | int ret; | |
1600 | ||
1601 | memset(&msg, 0, sizeof(msg)); | |
1602 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1603 | msg.m.session_objd = session_objd; | |
1604 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1605 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1606 | ||
1607 | /* Calculate entries len, serialize entries. */ | |
1608 | if (nr_entries > 0) { | |
1609 | ret = serialize_entries(&entries, | |
1610 | nr_entries, lttng_entries); | |
1611 | if (ret) | |
1612 | return ret; | |
1613 | } | |
1614 | ||
1615 | entries_len = sizeof(*entries) * nr_entries; | |
1616 | msg.m.entries_len = entries_len; | |
1617 | ||
1618 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1619 | if (len > 0 && len != sizeof(msg)) { | |
1620 | ret = -EIO; | |
1621 | goto error_entries; | |
1622 | } | |
1623 | if (len < 0) { | |
1624 | ret = len; | |
1625 | goto error_entries; | |
1626 | } | |
1627 | ||
1628 | /* send entries */ | |
1629 | if (entries_len > 0) { | |
1630 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1631 | if (len > 0 && len != entries_len) { | |
1632 | ret = -EIO; | |
1633 | goto error_entries; | |
1634 | } | |
1635 | if (len < 0) { | |
1636 | ret = len; | |
1637 | goto error_entries; | |
1638 | } | |
1639 | } | |
1640 | free(entries); | |
1641 | entries = NULL; | |
1642 | ||
1643 | /* receive reply */ | |
1644 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1645 | switch (len) { | |
1646 | case 0: /* orderly shutdown */ | |
1647 | return -EPIPE; | |
1648 | case sizeof(reply): | |
1649 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1650 | ERR("Unexpected result message command " | |
1651 | "expected: %u vs received: %u\n", | |
1652 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1653 | return -EINVAL; | |
1654 | } | |
1655 | if (reply.r.ret_code > 0) | |
1656 | return -EINVAL; | |
1657 | if (reply.r.ret_code < 0) | |
1658 | return reply.r.ret_code; | |
1659 | *id = reply.r.enum_id; | |
1660 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1661 | enum_name, reply.r.ret_code); | |
1662 | return 0; | |
1663 | default: | |
1664 | if (len < 0) { | |
1665 | /* Transport level error */ | |
1666 | if (errno == EPIPE || errno == ECONNRESET) | |
1667 | len = -errno; | |
1668 | return len; | |
1669 | } else { | |
1670 | ERR("incorrect message size: %zd\n", len); | |
1671 | return len; | |
1672 | } | |
1673 | } | |
1674 | return ret; | |
1675 | ||
1676 | error_entries: | |
1677 | free(entries); | |
1678 | return ret; | |
32ce8569 MD |
1679 | } |
1680 | ||
1681 | /* | |
1682 | * Returns 0 on success, negative error value on error. | |
1683 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1684 | */ | |
1685 | int ustcomm_register_channel(int sock, | |
53569322 | 1686 | struct lttng_session *session, |
32ce8569 MD |
1687 | int session_objd, /* session descriptor */ |
1688 | int channel_objd, /* channel descriptor */ | |
1689 | size_t nr_ctx_fields, | |
83e43212 | 1690 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1691 | uint32_t *chan_id, /* channel id (output) */ |
1692 | int *header_type) /* header type (output) */ | |
1693 | { | |
1694 | ssize_t len; | |
1695 | struct { | |
1696 | struct ustcomm_notify_hdr header; | |
1697 | struct ustcomm_notify_channel_msg m; | |
1698 | } msg; | |
1699 | struct { | |
1700 | struct ustcomm_notify_hdr header; | |
1701 | struct ustcomm_notify_channel_reply r; | |
1702 | } reply; | |
1703 | size_t fields_len; | |
83e43212 | 1704 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1705 | int ret; |
1706 | size_t nr_write_fields = 0; | |
1707 | ||
1708 | memset(&msg, 0, sizeof(msg)); | |
1709 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1710 | msg.m.session_objd = session_objd; | |
1711 | msg.m.channel_objd = channel_objd; | |
1712 | ||
1713 | /* Calculate fields len, serialize fields. */ | |
1714 | if (nr_ctx_fields > 0) { | |
53569322 | 1715 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1716 | nr_ctx_fields, ctx_fields); |
1717 | if (ret) | |
1718 | return ret; | |
1719 | } | |
1720 | ||
1721 | fields_len = sizeof(*fields) * nr_write_fields; | |
1722 | msg.m.ctx_fields_len = fields_len; | |
1723 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1724 | if (len > 0 && len != sizeof(msg)) { | |
1725 | free(fields); | |
1726 | return -EIO; | |
1727 | } | |
1728 | if (len < 0) { | |
1729 | free(fields); | |
1730 | return len; | |
1731 | } | |
1732 | ||
1733 | /* send fields */ | |
1734 | if (fields_len > 0) { | |
1735 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1736 | free(fields); | |
1737 | if (len > 0 && len != fields_len) { | |
1738 | return -EIO; | |
1739 | } | |
1740 | if (len < 0) { | |
1741 | return len; | |
1742 | } | |
17ea789c MD |
1743 | } else { |
1744 | free(fields); | |
32ce8569 MD |
1745 | } |
1746 | ||
1747 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1748 | switch (len) { | |
1749 | case 0: /* orderly shutdown */ | |
1750 | return -EPIPE; | |
1751 | case sizeof(reply): | |
1752 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1753 | ERR("Unexpected result message command " | |
1754 | "expected: %u vs received: %u\n", | |
1755 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1756 | return -EINVAL; | |
1757 | } | |
1758 | if (reply.r.ret_code > 0) | |
1759 | return -EINVAL; | |
1760 | if (reply.r.ret_code < 0) | |
1761 | return reply.r.ret_code; | |
1762 | *chan_id = reply.r.chan_id; | |
1763 | switch (reply.r.header_type) { | |
1764 | case 1: | |
1765 | case 2: | |
1766 | *header_type = reply.r.header_type; | |
1767 | break; | |
1768 | default: | |
1769 | ERR("Unexpected channel header type %u\n", | |
1770 | reply.r.header_type); | |
1771 | return -EINVAL; | |
1772 | } | |
1773 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1774 | reply.r.chan_id, reply.r.header_type); | |
1775 | return 0; | |
1776 | default: | |
1777 | if (len < 0) { | |
1778 | /* Transport level error */ | |
1779 | if (errno == EPIPE || errno == ECONNRESET) | |
1780 | len = -errno; | |
1781 | return len; | |
1782 | } else { | |
1783 | ERR("incorrect message size: %zd\n", len); | |
1784 | return len; | |
1785 | } | |
1786 | } | |
1787 | } | |
ff517991 MD |
1788 | |
1789 | /* | |
1790 | * Set socket reciving timeout. | |
1791 | */ | |
1792 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1793 | { | |
1794 | int ret; | |
1795 | struct timeval tv; | |
1796 | ||
1797 | tv.tv_sec = msec / 1000; | |
1798 | tv.tv_usec = (msec * 1000 % 1000000); | |
1799 | ||
1800 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1801 | if (ret < 0) { | |
1802 | PERROR("setsockopt SO_RCVTIMEO"); | |
1803 | ret = -errno; | |
1804 | } | |
1805 | ||
1806 | return ret; | |
1807 | } | |
1808 | ||
1809 | /* | |
1810 | * Set socket sending timeout. | |
1811 | */ | |
1812 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1813 | { | |
1814 | int ret; | |
1815 | struct timeval tv; | |
1816 | ||
1817 | tv.tv_sec = msec / 1000; | |
1818 | tv.tv_usec = (msec * 1000) % 1000000; | |
1819 | ||
1820 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1821 | if (ret < 0) { | |
1822 | PERROR("setsockopt SO_SNDTIMEO"); | |
1823 | ret = -errno; | |
1824 | } | |
1825 | ||
1826 | return ret; | |
1827 | } |