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 | |
74d81a6c MD |
671 | int ustcomm_recv_stream_from_sessiond(int sock, |
672 | uint64_t *memory_map_size, | |
673 | int *shm_fd, int *wakeup_fd) | |
674 | { | |
675 | ssize_t len; | |
676 | int ret; | |
677 | int fds[2]; | |
678 | ||
679 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 680 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
681 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
682 | if (len <= 0) { | |
6548fca4 | 683 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
684 | if (len < 0) { |
685 | ret = len; | |
686 | goto error; | |
687 | } else { | |
688 | ret = -EIO; | |
689 | goto error; | |
690 | } | |
7bc53e94 | 691 | } |
f5c453e9 JR |
692 | |
693 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
694 | if (ret < 0) { | |
f5c453e9 JR |
695 | ret = close(fds[0]); |
696 | if (ret) { | |
697 | PERROR("close on received shm_fd"); | |
698 | } | |
699 | ret = -EIO; | |
20d1999d | 700 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
701 | goto error; |
702 | } | |
703 | *shm_fd = ret; | |
704 | ||
705 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
706 | if (ret < 0) { | |
f5c453e9 JR |
707 | ret = close(*shm_fd); |
708 | if (ret) { | |
709 | PERROR("close on shm_fd"); | |
710 | } | |
711 | *shm_fd = -1; | |
712 | ret = close(fds[1]); | |
713 | if (ret) { | |
714 | PERROR("close on received wakeup_fd"); | |
715 | } | |
716 | ret = -EIO; | |
20d1999d | 717 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
718 | goto error; |
719 | } | |
720 | *wakeup_fd = ret; | |
6548fca4 | 721 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
722 | return 0; |
723 | ||
724 | error: | |
57773204 MD |
725 | return ret; |
726 | } | |
32ce8569 MD |
727 | |
728 | /* | |
729 | * Returns 0 on success, negative error value on error. | |
730 | */ | |
731 | int ustcomm_send_reg_msg(int sock, | |
732 | enum ustctl_socket_type type, | |
733 | uint32_t bits_per_long, | |
734 | uint32_t uint8_t_alignment, | |
735 | uint32_t uint16_t_alignment, | |
736 | uint32_t uint32_t_alignment, | |
737 | uint32_t uint64_t_alignment, | |
738 | uint32_t long_alignment) | |
739 | { | |
740 | ssize_t len; | |
741 | struct ustctl_reg_msg reg_msg; | |
742 | ||
743 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
744 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
745 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
746 | reg_msg.pid = getpid(); | |
747 | reg_msg.ppid = getppid(); | |
748 | reg_msg.uid = getuid(); | |
749 | reg_msg.gid = getgid(); | |
750 | reg_msg.bits_per_long = bits_per_long; | |
751 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
752 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
753 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
754 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
755 | reg_msg.long_alignment = long_alignment; | |
756 | reg_msg.socket_type = type; | |
0db3d6ee | 757 | lttng_pthread_getname_np(reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); |
32ce8569 MD |
758 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); |
759 | ||
760 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
761 | if (len > 0 && len != sizeof(reg_msg)) | |
762 | return -EIO; | |
763 | if (len < 0) | |
764 | return len; | |
765 | return 0; | |
766 | } | |
767 | ||
53569322 MD |
768 | static |
769 | ssize_t count_one_type(const struct lttng_type *lt) | |
770 | { | |
771 | switch (lt->atype) { | |
772 | case atype_integer: | |
773 | case atype_float: | |
774 | case atype_string: | |
775 | case atype_enum: | |
776 | case atype_array: | |
777 | case atype_sequence: | |
778 | return 1; | |
779 | case atype_struct: | |
218deb69 | 780 | return count_fields_recursive(lt->u.legacy._struct.nr_fields, |
cf22367f | 781 | lt->u.legacy._struct.fields) + 1; |
218deb69 MD |
782 | case atype_enum_nestable: |
783 | return count_one_type(lt->u.enum_nestable.container_type) + 1; | |
784 | case atype_array_nestable: | |
785 | return count_one_type(lt->u.array_nestable.elem_type) + 1; | |
786 | case atype_sequence_nestable: | |
787 | return count_one_type(lt->u.sequence_nestable.elem_type) + 1; | |
788 | case atype_struct_nestable: | |
789 | return count_fields_recursive(lt->u.struct_nestable.nr_fields, | |
cf22367f | 790 | lt->u.struct_nestable.fields) + 1; |
218deb69 | 791 | |
53569322 MD |
792 | case atype_dynamic: |
793 | { | |
794 | const struct lttng_event_field *choices; | |
795 | size_t nr_choices; | |
796 | int ret; | |
797 | ||
798 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
799 | &choices); | |
800 | if (ret) | |
801 | return ret; | |
802 | /* | |
cf22367f | 803 | * Two fields for enum, one field for variant, and |
53569322 MD |
804 | * one field per choice. |
805 | */ | |
cf22367f | 806 | return count_fields_recursive(nr_choices, choices) + 3; |
53569322 | 807 | } |
218deb69 | 808 | |
53569322 MD |
809 | default: |
810 | return -EINVAL; | |
811 | } | |
812 | return 0; | |
813 | } | |
814 | ||
815 | static | |
816 | ssize_t count_fields_recursive(size_t nr_fields, | |
817 | const struct lttng_event_field *lttng_fields) | |
818 | { | |
819 | int i; | |
820 | ssize_t ret, count = 0; | |
821 | ||
822 | for (i = 0; i < nr_fields; i++) { | |
823 | const struct lttng_event_field *lf; | |
824 | ||
825 | lf = <tng_fields[i]; | |
826 | /* skip 'nowrite' fields */ | |
827 | if (lf->nowrite) | |
828 | continue; | |
829 | ret = count_one_type(&lf->type); | |
830 | if (ret < 0) | |
831 | return ret; /* error */ | |
832 | count += ret; | |
833 | } | |
834 | return count; | |
835 | } | |
836 | ||
837 | static | |
838 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
839 | const struct lttng_ctx_field *lttng_fields) | |
840 | { | |
841 | int i; | |
842 | ssize_t ret, count = 0; | |
843 | ||
844 | for (i = 0; i < nr_fields; i++) { | |
845 | const struct lttng_event_field *lf; | |
846 | ||
847 | lf = <tng_fields[i].event_field; | |
848 | /* skip 'nowrite' fields */ | |
849 | if (lf->nowrite) | |
850 | continue; | |
851 | ret = count_one_type(&lf->type); | |
852 | if (ret < 0) | |
853 | return ret; /* error */ | |
854 | count += ret; | |
855 | } | |
856 | return count; | |
857 | } | |
858 | ||
7f2348b8 | 859 | static |
735ea6a8 | 860 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
861 | enum lttng_string_encodings le) |
862 | { | |
863 | switch (le) { | |
864 | case lttng_encode_none: | |
865 | *ue = ustctl_encode_none; | |
866 | break; | |
867 | case lttng_encode_UTF8: | |
868 | *ue = ustctl_encode_UTF8; | |
869 | break; | |
870 | case lttng_encode_ASCII: | |
871 | *ue = ustctl_encode_ASCII; | |
872 | break; | |
873 | default: | |
874 | return -EINVAL; | |
875 | } | |
876 | return 0; | |
877 | } | |
878 | ||
32ce8569 | 879 | static |
c785c634 MD |
880 | int serialize_integer_type(struct ustctl_integer_type *uit, |
881 | const struct lttng_integer_type *lit) | |
882 | { | |
973eac63 GAPG |
883 | int32_t encoding; |
884 | ||
c785c634 MD |
885 | uit->size = lit->size; |
886 | uit->signedness = lit->signedness; | |
887 | uit->reverse_byte_order = lit->reverse_byte_order; | |
888 | uit->base = lit->base; | |
973eac63 | 889 | if (serialize_string_encoding(&encoding, lit->encoding)) |
c785c634 | 890 | return -EINVAL; |
973eac63 | 891 | uit->encoding = encoding; |
c785c634 MD |
892 | uit->alignment = lit->alignment; |
893 | return 0; | |
894 | } | |
895 | ||
896 | static | |
897 | int serialize_basic_type(struct lttng_session *session, | |
898 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 899 | enum lttng_abstract_types atype, |
32ce8569 MD |
900 | union _ustctl_basic_type *ubt, |
901 | const union _lttng_basic_type *lbt) | |
902 | { | |
903 | switch (atype) { | |
904 | case atype_integer: | |
905 | { | |
c785c634 | 906 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 907 | return -EINVAL; |
2b213b16 | 908 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
909 | break; |
910 | } | |
911 | case atype_string: | |
912 | { | |
973eac63 GAPG |
913 | int32_t encoding; |
914 | ||
915 | if (serialize_string_encoding(&encoding, lbt->string.encoding)) | |
7f2348b8 | 916 | return -EINVAL; |
973eac63 | 917 | ubt->string.encoding = encoding; |
2b213b16 | 918 | *uatype = ustctl_atype_string; |
32ce8569 MD |
919 | break; |
920 | } | |
921 | case atype_float: | |
922 | { | |
923 | struct ustctl_float_type *uft; | |
924 | const struct lttng_float_type *lft; | |
925 | ||
926 | uft = &ubt->_float; | |
927 | lft = &lbt->_float; | |
928 | uft->exp_dig = lft->exp_dig; | |
929 | uft->mant_dig = lft->mant_dig; | |
930 | uft->alignment = lft->alignment; | |
931 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 932 | *uatype = ustctl_atype_float; |
32ce8569 MD |
933 | break; |
934 | } | |
935 | case atype_enum: | |
c785c634 MD |
936 | { |
937 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
938 | LTTNG_UST_SYM_NAME_LEN); | |
939 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
940 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
941 | &lbt->enumeration.container_type)) | |
942 | return -EINVAL; | |
943 | if (session) { | |
944 | const struct lttng_enum *_enum; | |
945 | ||
b33b46f7 | 946 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
947 | if (!_enum) |
948 | return -EINVAL; | |
949 | ubt->enumeration.id = _enum->id; | |
950 | } else { | |
951 | ubt->enumeration.id = -1ULL; | |
952 | } | |
953 | *uatype = ustctl_atype_enum; | |
954 | break; | |
955 | } | |
32ce8569 | 956 | case atype_array: |
218deb69 | 957 | case atype_array_nestable: |
32ce8569 | 958 | case atype_sequence: |
218deb69 MD |
959 | case atype_sequence_nestable: |
960 | case atype_enum_nestable: | |
32ce8569 MD |
961 | default: |
962 | return -EINVAL; | |
963 | } | |
964 | return 0; | |
32ce8569 MD |
965 | } |
966 | ||
967 | static | |
53569322 MD |
968 | int serialize_dynamic_type(struct lttng_session *session, |
969 | struct ustctl_field *fields, size_t *iter_output, | |
218deb69 | 970 | const char *field_name) |
32ce8569 | 971 | { |
53569322 MD |
972 | const struct lttng_event_field *choices; |
973 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
974 | const struct lttng_type *tag_type; | |
975 | const struct lttng_event_field *tag_field_generic; | |
976 | struct lttng_event_field tag_field = { | |
977 | .name = tag_field_name, | |
978 | .nowrite = 0, | |
979 | }; | |
980 | struct ustctl_field *uf; | |
981 | size_t nr_choices, i; | |
32ce8569 MD |
982 | int ret; |
983 | ||
53569322 MD |
984 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
985 | tag_type = &tag_field_generic->type; | |
986 | ||
987 | /* Serialize enum field. */ | |
218deb69 | 988 | strncpy(tag_field_name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
989 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
990 | strncat(tag_field_name, | |
991 | "_tag", | |
992 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
993 | tag_field.type = *tag_type; | |
994 | ret = serialize_one_field(session, fields, iter_output, | |
995 | &tag_field); | |
996 | if (ret) | |
997 | return ret; | |
998 | ||
999 | /* Serialize variant field. */ | |
1000 | uf = &fields[*iter_output]; | |
1001 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
1002 | if (ret) | |
1003 | return ret; | |
1004 | ||
218deb69 | 1005 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
1006 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1007 | uf->type.atype = ustctl_atype_variant; | |
218deb69 MD |
1008 | uf->type.u.variant_nestable.nr_choices = nr_choices; |
1009 | strncpy(uf->type.u.variant_nestable.tag_name, | |
53569322 MD |
1010 | tag_field_name, |
1011 | LTTNG_UST_SYM_NAME_LEN); | |
218deb69 MD |
1012 | uf->type.u.variant_nestable.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1013 | uf->type.u.variant_nestable.alignment = 0; | |
53569322 MD |
1014 | (*iter_output)++; |
1015 | ||
1016 | /* Serialize choice fields after variant. */ | |
1017 | for (i = 0; i < nr_choices; i++) { | |
1018 | ret = serialize_one_field(session, fields, | |
1019 | iter_output, &choices[i]); | |
1020 | if (ret) | |
1021 | return ret; | |
1022 | } | |
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static | |
218deb69 | 1027 | int serialize_one_type(struct lttng_session *session, |
53569322 | 1028 | struct ustctl_field *fields, size_t *iter_output, |
218deb69 | 1029 | const char *field_name, const struct lttng_type *lt) |
53569322 | 1030 | { |
53569322 MD |
1031 | int ret; |
1032 | ||
218deb69 MD |
1033 | /* |
1034 | * Serializing a type (rather than a field) generates a ustctl_field | |
1035 | * entry with 0-length name. | |
1036 | */ | |
53569322 | 1037 | |
32ce8569 MD |
1038 | switch (lt->atype) { |
1039 | case atype_integer: | |
1040 | case atype_float: | |
1041 | case atype_string: | |
c785c634 | 1042 | case atype_enum: |
53569322 MD |
1043 | { |
1044 | struct ustctl_field *uf = &fields[*iter_output]; | |
1045 | struct ustctl_type *ut = &uf->type; | |
973eac63 | 1046 | enum ustctl_abstract_types atype; |
53569322 | 1047 | |
218deb69 MD |
1048 | if (field_name) { |
1049 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1050 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1051 | } else { | |
1052 | uf->name[0] = '\0'; | |
1053 | } | |
973eac63 | 1054 | ret = serialize_basic_type(session, &atype, lt->atype, |
218deb69 | 1055 | &ut->u.legacy.basic, <->u.legacy.basic); |
32ce8569 MD |
1056 | if (ret) |
1057 | return ret; | |
973eac63 | 1058 | ut->atype = atype; |
53569322 | 1059 | (*iter_output)++; |
32ce8569 | 1060 | break; |
53569322 | 1061 | } |
32ce8569 MD |
1062 | case atype_array: |
1063 | { | |
53569322 MD |
1064 | struct ustctl_field *uf = &fields[*iter_output]; |
1065 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1066 | struct ustctl_basic_type *ubt; |
1067 | const struct lttng_basic_type *lbt; | |
973eac63 | 1068 | enum ustctl_abstract_types atype; |
32ce8569 | 1069 | |
218deb69 MD |
1070 | if (field_name) { |
1071 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1072 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1073 | } else { | |
1074 | uf->name[0] = '\0'; | |
1075 | } | |
1076 | ut->atype = ustctl_atype_array; | |
1077 | ubt = &ut->u.legacy.array.elem_type; | |
1078 | lbt = <->u.legacy.array.elem_type; | |
1079 | ut->u.legacy.array.length = lt->u.legacy.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; |
53569322 | 1085 | (*iter_output)++; |
32ce8569 MD |
1086 | break; |
1087 | } | |
218deb69 MD |
1088 | case atype_array_nestable: |
1089 | { | |
1090 | struct ustctl_field *uf = &fields[*iter_output]; | |
1091 | struct ustctl_type *ut = &uf->type; | |
1092 | ||
1093 | if (field_name) { | |
1094 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1095 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1096 | } else { | |
1097 | uf->name[0] = '\0'; | |
1098 | } | |
1099 | ut->atype = ustctl_atype_array_nestable; | |
1100 | ut->u.array_nestable.length = lt->u.array_nestable.length; | |
1101 | ut->u.array_nestable.alignment = lt->u.array_nestable.alignment; | |
1102 | (*iter_output)++; | |
1103 | ||
1104 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1105 | lt->u.array_nestable.elem_type); | |
1106 | if (ret) | |
1107 | return -EINVAL; | |
1108 | break; | |
1109 | } | |
32ce8569 MD |
1110 | case atype_sequence: |
1111 | { | |
53569322 MD |
1112 | struct ustctl_field *uf = &fields[*iter_output]; |
1113 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1114 | struct ustctl_basic_type *ubt; |
1115 | const struct lttng_basic_type *lbt; | |
973eac63 | 1116 | enum ustctl_abstract_types atype; |
32ce8569 | 1117 | |
218deb69 MD |
1118 | if (field_name) { |
1119 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1120 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1121 | } else { | |
1122 | uf->name[0] = '\0'; | |
1123 | } | |
53569322 | 1124 | uf->type.atype = ustctl_atype_sequence; |
218deb69 MD |
1125 | ubt = &ut->u.legacy.sequence.length_type; |
1126 | lbt = <->u.legacy.sequence.length_type; | |
973eac63 | 1127 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1128 | &ubt->u.basic, &lbt->u.basic); |
1129 | if (ret) | |
1130 | return -EINVAL; | |
973eac63 | 1131 | ubt->atype = atype; |
218deb69 MD |
1132 | ubt = &ut->u.legacy.sequence.elem_type; |
1133 | lbt = <->u.legacy.sequence.elem_type; | |
973eac63 | 1134 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1135 | &ubt->u.basic, &lbt->u.basic); |
1136 | if (ret) | |
1137 | return -EINVAL; | |
973eac63 | 1138 | ubt->atype = atype; |
53569322 MD |
1139 | (*iter_output)++; |
1140 | break; | |
1141 | } | |
218deb69 MD |
1142 | case atype_sequence_nestable: |
1143 | { | |
1144 | struct ustctl_field *uf = &fields[*iter_output]; | |
1145 | struct ustctl_type *ut = &uf->type; | |
1146 | ||
1147 | if (field_name) { | |
1148 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1149 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1150 | } else { | |
1151 | uf->name[0] = '\0'; | |
1152 | } | |
1153 | ut->atype = ustctl_atype_sequence_nestable; | |
1154 | strncpy(ut->u.sequence_nestable.length_name, | |
1155 | lt->u.sequence_nestable.length_name, | |
1156 | LTTNG_UST_SYM_NAME_LEN); | |
1157 | ut->u.sequence_nestable.length_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1158 | ut->u.sequence_nestable.alignment = lt->u.sequence_nestable.alignment; | |
1159 | (*iter_output)++; | |
1160 | ||
1161 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1162 | lt->u.sequence_nestable.elem_type); | |
1163 | if (ret) | |
1164 | return -EINVAL; | |
1165 | break; | |
1166 | } | |
53569322 MD |
1167 | case atype_dynamic: |
1168 | { | |
218deb69 MD |
1169 | ret = serialize_dynamic_type(session, fields, iter_output, |
1170 | field_name); | |
53569322 MD |
1171 | if (ret) |
1172 | return -EINVAL; | |
1173 | break; | |
1174 | } | |
1175 | case atype_struct: | |
1176 | { | |
1177 | struct ustctl_field *uf = &fields[*iter_output]; | |
1178 | ||
218deb69 MD |
1179 | if (field_name) { |
1180 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1181 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1182 | } else { | |
1183 | uf->name[0] = '\0'; | |
53569322 | 1184 | } |
53569322 | 1185 | uf->type.atype = ustctl_atype_struct; |
218deb69 | 1186 | uf->type.u.legacy._struct.nr_fields = lt->u.legacy._struct.nr_fields; |
53569322 | 1187 | (*iter_output)++; |
218deb69 MD |
1188 | |
1189 | ret = serialize_fields(session, fields, iter_output, | |
1190 | lt->u.legacy._struct.nr_fields, | |
1191 | lt->u.legacy._struct.fields); | |
1192 | if (ret) | |
1193 | return -EINVAL; | |
1194 | break; | |
1195 | } | |
1196 | case atype_struct_nestable: | |
1197 | { | |
1198 | struct ustctl_field *uf = &fields[*iter_output]; | |
1199 | ||
1200 | if (field_name) { | |
1201 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1202 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1203 | } else { | |
1204 | uf->name[0] = '\0'; | |
1205 | } | |
1206 | uf->type.atype = ustctl_atype_struct_nestable; | |
1207 | uf->type.u.struct_nestable.nr_fields = lt->u.struct_nestable.nr_fields; | |
1208 | uf->type.u.struct_nestable.alignment = lt->u.struct_nestable.alignment; | |
1209 | (*iter_output)++; | |
1210 | ||
1211 | ret = serialize_fields(session, fields, iter_output, | |
1212 | lt->u.struct_nestable.nr_fields, | |
1213 | lt->u.struct_nestable.fields); | |
1214 | if (ret) | |
1215 | return -EINVAL; | |
1216 | break; | |
1217 | } | |
1218 | case atype_enum_nestable: | |
1219 | { | |
1220 | struct ustctl_field *uf = &fields[*iter_output]; | |
1221 | struct ustctl_type *ut = &uf->type; | |
1222 | ||
1223 | if (field_name) { | |
1224 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1225 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1226 | } else { | |
1227 | uf->name[0] = '\0'; | |
1228 | } | |
1229 | strncpy(ut->u.enum_nestable.name, lt->u.enum_nestable.desc->name, | |
1230 | LTTNG_UST_SYM_NAME_LEN); | |
1231 | ut->u.enum_nestable.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1232 | ut->atype = ustctl_atype_enum_nestable; | |
1233 | (*iter_output)++; | |
1234 | ||
1235 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1236 | lt->u.enum_nestable.container_type); | |
1237 | if (ret) | |
1238 | return -EINVAL; | |
1239 | if (session) { | |
1240 | const struct lttng_enum *_enum; | |
1241 | ||
1242 | _enum = lttng_ust_enum_get_from_desc(session, lt->u.enum_nestable.desc); | |
1243 | if (!_enum) | |
1244 | return -EINVAL; | |
1245 | ut->u.enum_nestable.id = _enum->id; | |
1246 | } else { | |
1247 | ut->u.enum_nestable.id = -1ULL; | |
1248 | } | |
32ce8569 MD |
1249 | break; |
1250 | } | |
32ce8569 MD |
1251 | default: |
1252 | return -EINVAL; | |
1253 | } | |
1254 | return 0; | |
1255 | } | |
1256 | ||
218deb69 MD |
1257 | static |
1258 | int serialize_one_field(struct lttng_session *session, | |
1259 | struct ustctl_field *fields, size_t *iter_output, | |
1260 | const struct lttng_event_field *lf) | |
1261 | { | |
1262 | /* skip 'nowrite' fields */ | |
1263 | if (lf->nowrite) | |
1264 | return 0; | |
1265 | ||
1266 | return serialize_one_type(session, fields, iter_output, lf->name, &lf->type); | |
1267 | } | |
1268 | ||
32ce8569 | 1269 | static |
c785c634 | 1270 | int serialize_fields(struct lttng_session *session, |
218deb69 MD |
1271 | struct ustctl_field *ustctl_fields, |
1272 | size_t *iter_output, size_t nr_lttng_fields, | |
1273 | const struct lttng_event_field *lttng_fields) | |
1274 | { | |
1275 | int ret; | |
1276 | size_t i; | |
1277 | ||
1278 | for (i = 0; i < nr_lttng_fields; i++) { | |
1279 | ret = serialize_one_field(session, ustctl_fields, | |
1280 | iter_output, <tng_fields[i]); | |
1281 | if (ret) | |
1282 | return ret; | |
1283 | } | |
1284 | return 0; | |
1285 | } | |
1286 | ||
1287 | static | |
1288 | int alloc_serialize_fields(struct lttng_session *session, | |
c785c634 | 1289 | size_t *_nr_write_fields, |
32ce8569 MD |
1290 | struct ustctl_field **ustctl_fields, |
1291 | size_t nr_fields, | |
1292 | const struct lttng_event_field *lttng_fields) | |
1293 | { | |
1294 | struct ustctl_field *fields; | |
53569322 | 1295 | int ret; |
218deb69 | 1296 | size_t iter_output = 0; |
53569322 MD |
1297 | ssize_t nr_write_fields; |
1298 | ||
1299 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1300 | if (nr_write_fields < 0) { | |
1301 | return (int) nr_write_fields; | |
1302 | } | |
32ce8569 | 1303 | |
53569322 | 1304 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1305 | if (!fields) |
1306 | return -ENOMEM; | |
1307 | ||
218deb69 MD |
1308 | ret = serialize_fields(session, fields, &iter_output, nr_fields, |
1309 | lttng_fields); | |
1310 | if (ret) | |
1311 | goto error_type; | |
32ce8569 MD |
1312 | |
1313 | *_nr_write_fields = nr_write_fields; | |
1314 | *ustctl_fields = fields; | |
1315 | return 0; | |
1316 | ||
1317 | error_type: | |
1318 | free(fields); | |
1319 | return ret; | |
1320 | } | |
1321 | ||
c785c634 MD |
1322 | static |
1323 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1324 | size_t nr_entries, | |
1325 | const struct lttng_enum_entry *lttng_entries) | |
1326 | { | |
1327 | struct ustctl_enum_entry *entries; | |
1328 | int i; | |
1329 | ||
1330 | /* Serialize the entries */ | |
1331 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1332 | if (!entries) | |
1333 | return -ENOMEM; | |
1334 | for (i = 0; i < nr_entries; i++) { | |
1335 | struct ustctl_enum_entry *uentry; | |
1336 | const struct lttng_enum_entry *lentry; | |
1337 | ||
1338 | uentry = &entries[i]; | |
1339 | lentry = <tng_entries[i]; | |
1340 | ||
a6f80644 MD |
1341 | uentry->start.value = lentry->start.value; |
1342 | uentry->start.signedness = lentry->start.signedness; | |
1343 | uentry->end.value = lentry->end.value; | |
1344 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1345 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1346 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1347 | |
1348 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1349 | uentry->u.extra.options |= | |
1350 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1351 | } | |
c785c634 MD |
1352 | } |
1353 | *_entries = entries; | |
1354 | return 0; | |
1355 | } | |
1356 | ||
83e43212 | 1357 | static |
53569322 MD |
1358 | int serialize_ctx_fields(struct lttng_session *session, |
1359 | size_t *_nr_write_fields, | |
83e43212 MD |
1360 | struct ustctl_field **ustctl_fields, |
1361 | size_t nr_fields, | |
1362 | const struct lttng_ctx_field *lttng_fields) | |
1363 | { | |
1364 | struct ustctl_field *fields; | |
53569322 MD |
1365 | int ret; |
1366 | size_t i, iter_output = 0; | |
1367 | ssize_t nr_write_fields; | |
83e43212 | 1368 | |
53569322 MD |
1369 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1370 | lttng_fields); | |
1371 | if (nr_write_fields < 0) { | |
1372 | return (int) nr_write_fields; | |
1373 | } | |
1374 | ||
1375 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1376 | if (!fields) |
1377 | return -ENOMEM; | |
1378 | ||
1379 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1380 | ret = serialize_one_field(session, fields, &iter_output, |
1381 | <tng_fields[i].event_field); | |
83e43212 MD |
1382 | if (ret) |
1383 | goto error_type; | |
83e43212 MD |
1384 | } |
1385 | ||
1386 | *_nr_write_fields = nr_write_fields; | |
1387 | *ustctl_fields = fields; | |
1388 | return 0; | |
1389 | ||
1390 | error_type: | |
1391 | free(fields); | |
1392 | return ret; | |
1393 | } | |
1394 | ||
32ce8569 MD |
1395 | /* |
1396 | * Returns 0 on success, negative error value on error. | |
1397 | */ | |
1398 | int ustcomm_register_event(int sock, | |
c785c634 | 1399 | struct lttng_session *session, |
32ce8569 MD |
1400 | int session_objd, /* session descriptor */ |
1401 | int channel_objd, /* channel descriptor */ | |
1402 | const char *event_name, /* event name (input) */ | |
1403 | int loglevel, | |
1404 | const char *signature, /* event signature (input) */ | |
1405 | size_t nr_fields, /* fields */ | |
1406 | const struct lttng_event_field *lttng_fields, | |
1407 | const char *model_emf_uri, | |
1408 | uint32_t *id) /* event id (output) */ | |
1409 | { | |
1410 | ssize_t len; | |
1411 | struct { | |
1412 | struct ustcomm_notify_hdr header; | |
1413 | struct ustcomm_notify_event_msg m; | |
1414 | } msg; | |
1415 | struct { | |
1416 | struct ustcomm_notify_hdr header; | |
1417 | struct ustcomm_notify_event_reply r; | |
1418 | } reply; | |
1419 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1420 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1421 | size_t nr_write_fields = 0; |
1422 | int ret; | |
1423 | ||
1424 | memset(&msg, 0, sizeof(msg)); | |
1425 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1426 | msg.m.session_objd = session_objd; | |
1427 | msg.m.channel_objd = channel_objd; | |
1428 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1429 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1430 | msg.m.loglevel = loglevel; | |
1431 | signature_len = strlen(signature) + 1; | |
1432 | msg.m.signature_len = signature_len; | |
1433 | ||
1434 | /* Calculate fields len, serialize fields. */ | |
1435 | if (nr_fields > 0) { | |
218deb69 | 1436 | ret = alloc_serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1437 | nr_fields, lttng_fields); |
1438 | if (ret) | |
1439 | return ret; | |
1440 | } | |
1441 | ||
1442 | fields_len = sizeof(*fields) * nr_write_fields; | |
1443 | msg.m.fields_len = fields_len; | |
1444 | if (model_emf_uri) { | |
1445 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1446 | } else { | |
1447 | model_emf_uri_len = 0; | |
1448 | } | |
1449 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1450 | |
32ce8569 MD |
1451 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1452 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1453 | ret = -EIO; |
1454 | goto error_fields; | |
32ce8569 MD |
1455 | } |
1456 | if (len < 0) { | |
c785c634 MD |
1457 | ret = len; |
1458 | goto error_fields; | |
32ce8569 MD |
1459 | } |
1460 | ||
1461 | /* send signature */ | |
1462 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1463 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1464 | ret = -EIO; |
1465 | goto error_fields; | |
32ce8569 MD |
1466 | } |
1467 | if (len < 0) { | |
6b95617c MD |
1468 | ret = len; |
1469 | goto error_fields; | |
32ce8569 MD |
1470 | } |
1471 | ||
1472 | /* send fields */ | |
1473 | if (fields_len > 0) { | |
1474 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1475 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1476 | ret = -EIO; |
1477 | goto error_fields; | |
32ce8569 MD |
1478 | } |
1479 | if (len < 0) { | |
c785c634 MD |
1480 | ret = len; |
1481 | goto error_fields; | |
32ce8569 MD |
1482 | } |
1483 | } | |
6b95617c | 1484 | free(fields); |
32ce8569 MD |
1485 | |
1486 | if (model_emf_uri_len) { | |
1487 | /* send model_emf_uri */ | |
1488 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1489 | model_emf_uri_len); | |
c785c634 | 1490 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1491 | return -EIO; |
c785c634 MD |
1492 | } |
1493 | if (len < 0) { | |
6b95617c | 1494 | return len; |
c785c634 | 1495 | } |
32ce8569 MD |
1496 | } |
1497 | ||
1498 | /* receive reply */ | |
1499 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1500 | switch (len) { | |
1501 | case 0: /* orderly shutdown */ | |
1502 | return -EPIPE; | |
1503 | case sizeof(reply): | |
1504 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1505 | ERR("Unexpected result message command " | |
1506 | "expected: %u vs received: %u\n", | |
1507 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1508 | return -EINVAL; | |
1509 | } | |
1510 | if (reply.r.ret_code > 0) | |
1511 | return -EINVAL; | |
1512 | if (reply.r.ret_code < 0) | |
1513 | return reply.r.ret_code; | |
1514 | *id = reply.r.event_id; | |
1515 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1516 | event_name, reply.r.ret_code, reply.r.event_id); | |
1517 | return 0; | |
1518 | default: | |
1519 | if (len < 0) { | |
1520 | /* Transport level error */ | |
1521 | if (errno == EPIPE || errno == ECONNRESET) | |
1522 | len = -errno; | |
1523 | return len; | |
1524 | } else { | |
1525 | ERR("incorrect message size: %zd\n", len); | |
1526 | return len; | |
1527 | } | |
1528 | } | |
6b95617c | 1529 | /* Unreached. */ |
c785c634 | 1530 | |
6b95617c | 1531 | /* Error path only. */ |
c785c634 MD |
1532 | error_fields: |
1533 | free(fields); | |
1534 | return ret; | |
1535 | } | |
1536 | ||
1537 | /* | |
1538 | * Returns 0 on success, negative error value on error. | |
1539 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1540 | */ | |
1541 | int ustcomm_register_enum(int sock, | |
1542 | int session_objd, /* session descriptor */ | |
1543 | const char *enum_name, /* enum name (input) */ | |
1544 | size_t nr_entries, /* entries */ | |
1545 | const struct lttng_enum_entry *lttng_entries, | |
1546 | uint64_t *id) | |
1547 | { | |
1548 | ssize_t len; | |
1549 | struct { | |
1550 | struct ustcomm_notify_hdr header; | |
1551 | struct ustcomm_notify_enum_msg m; | |
1552 | } msg; | |
1553 | struct { | |
1554 | struct ustcomm_notify_hdr header; | |
1555 | struct ustcomm_notify_enum_reply r; | |
1556 | } reply; | |
1557 | size_t entries_len; | |
1558 | struct ustctl_enum_entry *entries = NULL; | |
1559 | int ret; | |
1560 | ||
1561 | memset(&msg, 0, sizeof(msg)); | |
1562 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1563 | msg.m.session_objd = session_objd; | |
1564 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1565 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1566 | ||
1567 | /* Calculate entries len, serialize entries. */ | |
1568 | if (nr_entries > 0) { | |
1569 | ret = serialize_entries(&entries, | |
1570 | nr_entries, lttng_entries); | |
1571 | if (ret) | |
1572 | return ret; | |
1573 | } | |
1574 | ||
1575 | entries_len = sizeof(*entries) * nr_entries; | |
1576 | msg.m.entries_len = entries_len; | |
1577 | ||
1578 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1579 | if (len > 0 && len != sizeof(msg)) { | |
1580 | ret = -EIO; | |
1581 | goto error_entries; | |
1582 | } | |
1583 | if (len < 0) { | |
1584 | ret = len; | |
1585 | goto error_entries; | |
1586 | } | |
1587 | ||
1588 | /* send entries */ | |
1589 | if (entries_len > 0) { | |
1590 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1591 | if (len > 0 && len != entries_len) { | |
1592 | ret = -EIO; | |
1593 | goto error_entries; | |
1594 | } | |
1595 | if (len < 0) { | |
1596 | ret = len; | |
1597 | goto error_entries; | |
1598 | } | |
1599 | } | |
1600 | free(entries); | |
1601 | entries = NULL; | |
1602 | ||
1603 | /* receive reply */ | |
1604 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1605 | switch (len) { | |
1606 | case 0: /* orderly shutdown */ | |
1607 | return -EPIPE; | |
1608 | case sizeof(reply): | |
1609 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1610 | ERR("Unexpected result message command " | |
1611 | "expected: %u vs received: %u\n", | |
1612 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1613 | return -EINVAL; | |
1614 | } | |
1615 | if (reply.r.ret_code > 0) | |
1616 | return -EINVAL; | |
1617 | if (reply.r.ret_code < 0) | |
1618 | return reply.r.ret_code; | |
1619 | *id = reply.r.enum_id; | |
1620 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1621 | enum_name, reply.r.ret_code); | |
1622 | return 0; | |
1623 | default: | |
1624 | if (len < 0) { | |
1625 | /* Transport level error */ | |
1626 | if (errno == EPIPE || errno == ECONNRESET) | |
1627 | len = -errno; | |
1628 | return len; | |
1629 | } else { | |
1630 | ERR("incorrect message size: %zd\n", len); | |
1631 | return len; | |
1632 | } | |
1633 | } | |
1634 | return ret; | |
1635 | ||
1636 | error_entries: | |
1637 | free(entries); | |
1638 | return ret; | |
32ce8569 MD |
1639 | } |
1640 | ||
1641 | /* | |
1642 | * Returns 0 on success, negative error value on error. | |
1643 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1644 | */ | |
1645 | int ustcomm_register_channel(int sock, | |
53569322 | 1646 | struct lttng_session *session, |
32ce8569 MD |
1647 | int session_objd, /* session descriptor */ |
1648 | int channel_objd, /* channel descriptor */ | |
1649 | size_t nr_ctx_fields, | |
83e43212 | 1650 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1651 | uint32_t *chan_id, /* channel id (output) */ |
1652 | int *header_type) /* header type (output) */ | |
1653 | { | |
1654 | ssize_t len; | |
1655 | struct { | |
1656 | struct ustcomm_notify_hdr header; | |
1657 | struct ustcomm_notify_channel_msg m; | |
1658 | } msg; | |
1659 | struct { | |
1660 | struct ustcomm_notify_hdr header; | |
1661 | struct ustcomm_notify_channel_reply r; | |
1662 | } reply; | |
1663 | size_t fields_len; | |
83e43212 | 1664 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1665 | int ret; |
1666 | size_t nr_write_fields = 0; | |
1667 | ||
1668 | memset(&msg, 0, sizeof(msg)); | |
1669 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1670 | msg.m.session_objd = session_objd; | |
1671 | msg.m.channel_objd = channel_objd; | |
1672 | ||
1673 | /* Calculate fields len, serialize fields. */ | |
1674 | if (nr_ctx_fields > 0) { | |
53569322 | 1675 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1676 | nr_ctx_fields, ctx_fields); |
1677 | if (ret) | |
1678 | return ret; | |
1679 | } | |
1680 | ||
1681 | fields_len = sizeof(*fields) * nr_write_fields; | |
1682 | msg.m.ctx_fields_len = fields_len; | |
1683 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1684 | if (len > 0 && len != sizeof(msg)) { | |
1685 | free(fields); | |
1686 | return -EIO; | |
1687 | } | |
1688 | if (len < 0) { | |
1689 | free(fields); | |
1690 | return len; | |
1691 | } | |
1692 | ||
1693 | /* send fields */ | |
1694 | if (fields_len > 0) { | |
1695 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1696 | free(fields); | |
1697 | if (len > 0 && len != fields_len) { | |
1698 | return -EIO; | |
1699 | } | |
1700 | if (len < 0) { | |
1701 | return len; | |
1702 | } | |
17ea789c MD |
1703 | } else { |
1704 | free(fields); | |
32ce8569 MD |
1705 | } |
1706 | ||
1707 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1708 | switch (len) { | |
1709 | case 0: /* orderly shutdown */ | |
1710 | return -EPIPE; | |
1711 | case sizeof(reply): | |
1712 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1713 | ERR("Unexpected result message command " | |
1714 | "expected: %u vs received: %u\n", | |
1715 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1716 | return -EINVAL; | |
1717 | } | |
1718 | if (reply.r.ret_code > 0) | |
1719 | return -EINVAL; | |
1720 | if (reply.r.ret_code < 0) | |
1721 | return reply.r.ret_code; | |
1722 | *chan_id = reply.r.chan_id; | |
1723 | switch (reply.r.header_type) { | |
1724 | case 1: | |
1725 | case 2: | |
1726 | *header_type = reply.r.header_type; | |
1727 | break; | |
1728 | default: | |
1729 | ERR("Unexpected channel header type %u\n", | |
1730 | reply.r.header_type); | |
1731 | return -EINVAL; | |
1732 | } | |
1733 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1734 | reply.r.chan_id, reply.r.header_type); | |
1735 | return 0; | |
1736 | default: | |
1737 | if (len < 0) { | |
1738 | /* Transport level error */ | |
1739 | if (errno == EPIPE || errno == ECONNRESET) | |
1740 | len = -errno; | |
1741 | return len; | |
1742 | } else { | |
1743 | ERR("incorrect message size: %zd\n", len); | |
1744 | return len; | |
1745 | } | |
1746 | } | |
1747 | } | |
ff517991 MD |
1748 | |
1749 | /* | |
1750 | * Set socket reciving timeout. | |
1751 | */ | |
1752 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1753 | { | |
1754 | int ret; | |
1755 | struct timeval tv; | |
1756 | ||
1757 | tv.tv_sec = msec / 1000; | |
1758 | tv.tv_usec = (msec * 1000 % 1000000); | |
1759 | ||
1760 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1761 | if (ret < 0) { | |
1762 | PERROR("setsockopt SO_RCVTIMEO"); | |
1763 | ret = -errno; | |
1764 | } | |
1765 | ||
1766 | return ret; | |
1767 | } | |
1768 | ||
1769 | /* | |
1770 | * Set socket sending timeout. | |
1771 | */ | |
1772 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1773 | { | |
1774 | int ret; | |
1775 | struct timeval tv; | |
1776 | ||
1777 | tv.tv_sec = msec / 1000; | |
1778 | tv.tv_usec = (msec * 1000) % 1000000; | |
1779 | ||
1780 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1781 | if (ret < 0) { | |
1782 | PERROR("setsockopt SO_SNDTIMEO"); | |
1783 | ret = -errno; | |
1784 | } | |
1785 | ||
1786 | return ret; | |
1787 | } |