Commit | Line | Data |
---|---|---|
67c5b804 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
67c5b804 | 3 | * |
c0c0989a MJ |
4 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
5 | * Copyright (C) 2011-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
67c5b804 MD |
6 | */ |
7 | ||
67c5b804 | 8 | #include <limits.h> |
fb31eb73 | 9 | #include <stdint.h> |
67c5b804 MD |
10 | #include <stdio.h> |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/socket.h> | |
14 | #include <sys/stat.h> | |
15 | #include <sys/types.h> | |
16 | #include <sys/un.h> | |
17 | #include <unistd.h> | |
18 | #include <assert.h> | |
57773204 | 19 | #include <errno.h> |
11ba4bcb | 20 | #include <fcntl.h> |
67c5b804 | 21 | |
32ce8569 | 22 | #include <lttng/ust-ctl.h> |
9d315d6d MJ |
23 | #include "common/ustcomm.h" |
24 | #include "common/ust-fd.h" | |
25 | #include "common/macros.h" | |
9d315d6d MJ |
26 | #include "common/dynamic-type.h" |
27 | #include "common/logging.h" | |
32ce8569 | 28 | |
36c52fff | 29 | #include "common/events.h" |
27b98e6c | 30 | #include "common/compat/pthread.h" |
7bc53e94 | 31 | |
74d81a6c MD |
32 | #define USTCOMM_MAX_SEND_FDS 4 |
33 | ||
53569322 MD |
34 | static |
35 | ssize_t count_fields_recursive(size_t nr_fields, | |
3d33ca1d | 36 | const struct lttng_ust_event_field * const *lttng_fields); |
53569322 | 37 | static |
f69fe5fb | 38 | int serialize_one_field(struct lttng_ust_session *session, |
249cffb5 | 39 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
28db0827 MD |
40 | const struct lttng_ust_event_field *lf, |
41 | const char **prev_field_name); | |
218deb69 | 42 | static |
f69fe5fb | 43 | int serialize_fields(struct lttng_ust_session *session, |
249cffb5 | 44 | struct lttng_ust_ctl_field *lttng_ust_ctl_fields, |
218deb69 | 45 | size_t *iter_output, size_t nr_lttng_fields, |
3d33ca1d | 46 | const struct lttng_ust_event_field * const *lttng_fields); |
53569322 | 47 | |
67c5b804 | 48 | /* |
74d81a6c | 49 | * ustcomm_connect_unix_sock |
67c5b804 | 50 | * |
74d81a6c | 51 | * Connect to unix socket using the path name. |
6548fca4 MD |
52 | * |
53 | * Caller handles FD tracker. | |
67c5b804 | 54 | */ |
451d66b2 | 55 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
56 | { |
57 | struct sockaddr_un sun; | |
7bc53e94 | 58 | int fd, ret; |
67c5b804 | 59 | |
204d45df MD |
60 | /* |
61 | * libust threads require the close-on-exec flag for all | |
62 | * resources so it does not leak file descriptors upon exec. | |
6daf0c26 | 63 | * SOCK_CLOEXEC is not used since it is linux specific. |
204d45df | 64 | */ |
11ba4bcb | 65 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
67c5b804 | 66 | if (fd < 0) { |
32ce8569 | 67 | PERROR("socket"); |
7bc53e94 | 68 | ret = -errno; |
67c5b804 MD |
69 | goto error; |
70 | } | |
451d66b2 MD |
71 | if (timeout >= 0) { |
72 | /* Give at least 10ms. */ | |
73 | if (timeout < 10) | |
74 | timeout = 10; | |
75 | ret = ustcomm_setsockopt_snd_timeout(fd, timeout); | |
76 | if (ret < 0) { | |
77 | WARN("Error setting connect socket send timeout"); | |
78 | } | |
79 | } | |
11ba4bcb MD |
80 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); |
81 | if (ret < 0) { | |
32ce8569 | 82 | PERROR("fcntl"); |
7bc53e94 | 83 | ret = -errno; |
11ba4bcb MD |
84 | goto error_fcntl; |
85 | } | |
67c5b804 MD |
86 | |
87 | memset(&sun, 0, sizeof(sun)); | |
88 | sun.sun_family = AF_UNIX; | |
89 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
90 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
91 | ||
92 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
93 | if (ret < 0) { | |
94 | /* | |
0b9aa170 MD |
95 | * Don't print message on connect ENOENT error, because |
96 | * connect is used in normal execution to detect if | |
97 | * sessiond is alive. ENOENT is when the unix socket | |
98 | * file does not exist, and ECONNREFUSED is when the | |
99 | * file exists but no sessiond is listening. | |
67c5b804 | 100 | */ |
0b9aa170 | 101 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 102 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 103 | PERROR("connect"); |
7bc53e94 | 104 | ret = -errno; |
8cf811d3 MD |
105 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
106 | ret = -EPIPE; | |
67c5b804 MD |
107 | goto error_connect; |
108 | } | |
109 | ||
110 | return fd; | |
111 | ||
112 | error_connect: | |
11ba4bcb | 113 | error_fcntl: |
7bc53e94 MD |
114 | { |
115 | int closeret; | |
116 | ||
117 | closeret = close(fd); | |
118 | if (closeret) | |
32ce8569 | 119 | PERROR("close"); |
7bc53e94 | 120 | } |
67c5b804 MD |
121 | error: |
122 | return ret; | |
123 | } | |
124 | ||
125 | /* | |
74d81a6c | 126 | * ustcomm_accept_unix_sock |
67c5b804 | 127 | * |
74d81a6c MD |
128 | * Do an accept(2) on the sock and return the |
129 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 130 | */ |
57773204 | 131 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
132 | { |
133 | int new_fd; | |
134 | struct sockaddr_un sun; | |
135 | socklen_t len = 0; | |
136 | ||
137 | /* Blocking call */ | |
138 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
139 | if (new_fd < 0) { | |
b869b5ae MD |
140 | if (errno != ECONNABORTED) |
141 | PERROR("accept"); | |
142 | new_fd = -errno; | |
143 | if (new_fd == -ECONNABORTED) | |
144 | new_fd = -EPIPE; | |
67c5b804 | 145 | } |
67c5b804 | 146 | return new_fd; |
67c5b804 MD |
147 | } |
148 | ||
149 | /* | |
74d81a6c | 150 | * ustcomm_create_unix_sock |
67c5b804 | 151 | * |
74d81a6c MD |
152 | * Creates a AF_UNIX local socket using pathname |
153 | * bind the socket upon creation and return the fd. | |
67c5b804 | 154 | */ |
57773204 | 155 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
156 | { |
157 | struct sockaddr_un sun; | |
7bc53e94 | 158 | int fd, ret; |
67c5b804 MD |
159 | |
160 | /* Create server socket */ | |
161 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 162 | PERROR("socket"); |
7bc53e94 | 163 | ret = -errno; |
67c5b804 MD |
164 | goto error; |
165 | } | |
166 | ||
167 | memset(&sun, 0, sizeof(sun)); | |
168 | sun.sun_family = AF_UNIX; | |
169 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
170 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
171 | ||
172 | /* Unlink the old file if present */ | |
173 | (void) unlink(pathname); | |
174 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
175 | if (ret < 0) { | |
32ce8569 | 176 | PERROR("bind"); |
7bc53e94 MD |
177 | ret = -errno; |
178 | goto error_close; | |
67c5b804 MD |
179 | } |
180 | ||
181 | return fd; | |
182 | ||
7bc53e94 MD |
183 | error_close: |
184 | { | |
185 | int closeret; | |
186 | ||
187 | closeret = close(fd); | |
188 | if (closeret) { | |
32ce8569 | 189 | PERROR("close"); |
7bc53e94 MD |
190 | } |
191 | } | |
67c5b804 MD |
192 | error: |
193 | return ret; | |
194 | } | |
195 | ||
196 | /* | |
74d81a6c | 197 | * ustcomm_listen_unix_sock |
67c5b804 | 198 | * |
74d81a6c | 199 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 200 | */ |
57773204 | 201 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
202 | { |
203 | int ret; | |
204 | ||
e41474be | 205 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 206 | if (ret < 0) { |
7bc53e94 | 207 | ret = -errno; |
32ce8569 | 208 | PERROR("listen"); |
67c5b804 MD |
209 | } |
210 | ||
211 | return ret; | |
212 | } | |
213 | ||
214 | /* | |
74d81a6c MD |
215 | * ustcomm_close_unix_sock |
216 | * | |
217 | * Shutdown cleanly a unix socket. | |
6548fca4 MD |
218 | * |
219 | * Handles fd tracker internally. | |
74d81a6c MD |
220 | */ |
221 | int ustcomm_close_unix_sock(int sock) | |
222 | { | |
223 | int ret; | |
224 | ||
6548fca4 | 225 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 226 | ret = close(sock); |
6548fca4 MD |
227 | if (!ret) { |
228 | lttng_ust_delete_fd_from_tracker(sock); | |
229 | } else { | |
32ce8569 | 230 | PERROR("close"); |
74d81a6c MD |
231 | ret = -errno; |
232 | } | |
6548fca4 | 233 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
234 | |
235 | return ret; | |
236 | } | |
237 | ||
238 | /* | |
239 | * ustcomm_recv_unix_sock | |
67c5b804 | 240 | * |
74d81a6c MD |
241 | * Receive data of size len in put that data into |
242 | * the buf param. Using recvmsg API. | |
243 | * Return the size of received data. | |
244 | * Return 0 on orderly shutdown. | |
67c5b804 | 245 | */ |
57773204 | 246 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 247 | { |
913b87f1 | 248 | struct msghdr msg; |
67c5b804 | 249 | struct iovec iov[1]; |
89c5b6ec MD |
250 | ssize_t ret = -1; |
251 | size_t len_last; | |
67c5b804 | 252 | |
913b87f1 MD |
253 | memset(&msg, 0, sizeof(msg)); |
254 | ||
67c5b804 MD |
255 | iov[0].iov_base = buf; |
256 | iov[0].iov_len = len; | |
257 | msg.msg_iov = iov; | |
258 | msg.msg_iovlen = 1; | |
259 | ||
7e3cfcbe | 260 | do { |
89c5b6ec | 261 | len_last = iov[0].iov_len; |
7e3cfcbe | 262 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
263 | if (ret > 0) { |
264 | iov[0].iov_base += ret; | |
265 | iov[0].iov_len -= ret; | |
266 | assert(ret <= len_last); | |
267 | } | |
268 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
269 | |
270 | if (ret < 0) { | |
271 | int shutret; | |
272 | ||
8cf811d3 | 273 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 274 | PERROR("recvmsg"); |
7bc53e94 | 275 | ret = -errno; |
8cf811d3 | 276 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 277 | ret = -EPIPE; |
7bc53e94 MD |
278 | |
279 | shutret = shutdown(sock, SHUT_RDWR); | |
280 | if (shutret) | |
32ce8569 | 281 | ERR("Socket shutdown error"); |
89c5b6ec MD |
282 | } else if (ret > 0) { |
283 | ret = len; | |
67c5b804 | 284 | } |
89c5b6ec | 285 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
286 | |
287 | return ret; | |
288 | } | |
289 | ||
290 | /* | |
74d81a6c | 291 | * ustcomm_send_unix_sock |
67c5b804 | 292 | * |
74d81a6c MD |
293 | * Send buf data of size len. Using sendmsg API. |
294 | * Return the size of sent data. | |
67c5b804 | 295 | */ |
32ce8569 | 296 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 297 | { |
913b87f1 | 298 | struct msghdr msg; |
67c5b804 | 299 | struct iovec iov[1]; |
7bc53e94 | 300 | ssize_t ret; |
67c5b804 | 301 | |
913b87f1 MD |
302 | memset(&msg, 0, sizeof(msg)); |
303 | ||
32ce8569 | 304 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
305 | iov[0].iov_len = len; |
306 | msg.msg_iov = iov; | |
307 | msg.msg_iovlen = 1; | |
308 | ||
1ea11eab MD |
309 | /* |
310 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
311 | * libust, so libust does not receive an unhandled SIGPIPE or | |
312 | * SIGURG. The sessiond receiver side can be made more resilient | |
313 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
314 | * libust side. | |
315 | */ | |
51d9d699 MD |
316 | do { |
317 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
318 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
319 | |
320 | if (ret < 0) { | |
321 | int shutret; | |
322 | ||
74d81a6c | 323 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 324 | PERROR("sendmsg"); |
7bc53e94 | 325 | ret = -errno; |
b869b5ae MD |
326 | if (ret == -ECONNRESET) |
327 | ret = -EPIPE; | |
7bc53e94 MD |
328 | |
329 | shutret = shutdown(sock, SHUT_RDWR); | |
330 | if (shutret) | |
32ce8569 | 331 | ERR("Socket shutdown error"); |
67c5b804 MD |
332 | } |
333 | ||
334 | return ret; | |
335 | } | |
336 | ||
337 | /* | |
74d81a6c | 338 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 339 | * |
74d81a6c | 340 | * Returns the size of data sent, or negative error value. |
67c5b804 | 341 | */ |
74d81a6c | 342 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 343 | { |
913b87f1 | 344 | struct msghdr msg; |
67c5b804 MD |
345 | struct cmsghdr *cmptr; |
346 | struct iovec iov[1]; | |
347 | ssize_t ret = -1; | |
348 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
349 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 350 | char dummy = 0; |
67c5b804 | 351 | |
913b87f1 | 352 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 353 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 354 | |
74d81a6c MD |
355 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
356 | return -EINVAL; | |
67c5b804 MD |
357 | |
358 | msg.msg_control = (caddr_t)tmp; | |
359 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
360 | ||
361 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
362 | if (!cmptr) |
363 | return -EINVAL; | |
67c5b804 MD |
364 | cmptr->cmsg_level = SOL_SOCKET; |
365 | cmptr->cmsg_type = SCM_RIGHTS; | |
366 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
367 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
368 | /* Sum of the length of all control messages in the buffer: */ | |
369 | msg.msg_controllen = cmptr->cmsg_len; | |
370 | ||
74d81a6c MD |
371 | iov[0].iov_base = &dummy; |
372 | iov[0].iov_len = 1; | |
67c5b804 MD |
373 | msg.msg_iov = iov; |
374 | msg.msg_iovlen = 1; | |
375 | ||
51d9d699 | 376 | do { |
0dafcd63 | 377 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 378 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 379 | if (ret < 0) { |
74d81a6c MD |
380 | /* |
381 | * We consider EPIPE and ECONNRESET as expected. | |
382 | */ | |
383 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 384 | PERROR("sendmsg"); |
74d81a6c | 385 | } |
b869b5ae MD |
386 | ret = -errno; |
387 | if (ret == -ECONNRESET) | |
388 | ret = -EPIPE; | |
74d81a6c MD |
389 | } |
390 | return ret; | |
391 | } | |
7bc53e94 | 392 | |
74d81a6c MD |
393 | /* |
394 | * Recv a message accompanied by fd(s) from a unix socket. | |
395 | * | |
74d81a6c MD |
396 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
397 | * actually received in nb_fd. | |
398 | * Returns -EPIPE on orderly shutdown. | |
399 | */ | |
400 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
401 | { | |
402 | struct iovec iov[1]; | |
403 | ssize_t ret = 0; | |
404 | struct cmsghdr *cmsg; | |
405 | size_t sizeof_fds = nb_fd * sizeof(int); | |
406 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
407 | struct msghdr msg; | |
408 | char dummy; | |
6daf0c26 | 409 | int i; |
7bc53e94 | 410 | |
74d81a6c | 411 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 412 | |
74d81a6c MD |
413 | /* Prepare to receive the structures */ |
414 | iov[0].iov_base = &dummy; | |
415 | iov[0].iov_len = 1; | |
416 | msg.msg_iov = iov; | |
417 | msg.msg_iovlen = 1; | |
418 | msg.msg_control = recv_fd; | |
419 | msg.msg_controllen = sizeof(recv_fd); | |
420 | ||
421 | do { | |
422 | ret = recvmsg(sock, &msg, 0); | |
423 | } while (ret < 0 && errno == EINTR); | |
424 | if (ret < 0) { | |
425 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 426 | PERROR("recvmsg fds"); |
74d81a6c | 427 | } |
8cf811d3 | 428 | ret = -errno; |
b869b5ae MD |
429 | if (ret == -ECONNRESET) |
430 | ret = -EPIPE; | |
74d81a6c MD |
431 | goto end; |
432 | } | |
433 | if (ret == 0) { | |
434 | /* orderly shutdown */ | |
435 | ret = -EPIPE; | |
436 | goto end; | |
437 | } | |
438 | if (ret != 1) { | |
32ce8569 | 439 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
440 | ret, 1); |
441 | goto end; | |
442 | } | |
443 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 444 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
445 | ret = -1; |
446 | goto end; | |
447 | } | |
448 | cmsg = CMSG_FIRSTHDR(&msg); | |
449 | if (!cmsg) { | |
32ce8569 | 450 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
451 | ret = -1; |
452 | goto end; | |
453 | } | |
454 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 455 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
456 | ret = -1; |
457 | goto end; | |
458 | } | |
459 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 460 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
461 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
462 | ret = -1; | |
463 | goto end; | |
464 | } | |
6daf0c26 | 465 | |
74d81a6c | 466 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); |
6daf0c26 JR |
467 | |
468 | /* Set FD_CLOEXEC */ | |
469 | for (i = 0; i < nb_fd; i++) { | |
470 | ret = fcntl(fds[i], F_SETFD, FD_CLOEXEC); | |
471 | if (ret < 0) { | |
472 | PERROR("fcntl failed to set FD_CLOEXEC on fd %d", | |
473 | fds[i]); | |
474 | } | |
475 | } | |
476 | ||
6b32a5c3 | 477 | ret = nb_fd; |
74d81a6c | 478 | end: |
67c5b804 MD |
479 | return ret; |
480 | } | |
57773204 MD |
481 | |
482 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
483 | { | |
484 | ssize_t len; | |
485 | ||
486 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
487 | switch (len) { | |
488 | case sizeof(*lum): | |
57773204 | 489 | break; |
57773204 | 490 | default: |
7bc53e94 | 491 | if (len < 0) { |
7bc53e94 MD |
492 | return len; |
493 | } else { | |
32ce8569 | 494 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
495 | return -EINVAL; |
496 | } | |
57773204 MD |
497 | } |
498 | return 0; | |
499 | } | |
500 | ||
501 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
502 | uint32_t expected_handle, uint32_t expected_cmd) | |
503 | { | |
504 | ssize_t len; | |
505 | ||
506 | memset(lur, 0, sizeof(*lur)); | |
507 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
508 | switch (len) { | |
509 | case 0: /* orderly shutdown */ | |
74d81a6c | 510 | return -EPIPE; |
57773204 | 511 | case sizeof(*lur): |
5dafeeaa MD |
512 | { |
513 | int err = 0; | |
514 | ||
57773204 | 515 | if (lur->handle != expected_handle) { |
32ce8569 | 516 | ERR("Unexpected result message handle: " |
74d81a6c MD |
517 | "expected: %u vs received: %u\n", |
518 | expected_handle, lur->handle); | |
5dafeeaa | 519 | err = 1; |
57773204 | 520 | } |
57773204 | 521 | if (lur->cmd != expected_cmd) { |
32ce8569 | 522 | ERR("Unexpected result message command " |
74d81a6c MD |
523 | "expected: %u vs received: %u\n", |
524 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
525 | err = 1; |
526 | } | |
527 | if (err) { | |
57773204 | 528 | return -EINVAL; |
5dafeeaa MD |
529 | } else { |
530 | return lur->ret_code; | |
57773204 | 531 | } |
5dafeeaa | 532 | } |
57773204 | 533 | default: |
8cf811d3 | 534 | if (len >= 0) { |
32ce8569 | 535 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 536 | } |
8cf811d3 | 537 | return len; |
57773204 MD |
538 | } |
539 | } | |
540 | ||
541 | int ustcomm_send_app_cmd(int sock, | |
542 | struct ustcomm_ust_msg *lum, | |
543 | struct ustcomm_ust_reply *lur) | |
544 | { | |
545 | int ret; | |
546 | ||
547 | ret = ustcomm_send_app_msg(sock, lum); | |
548 | if (ret) | |
549 | return ret; | |
c354a72c MD |
550 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
551 | if (ret > 0) | |
552 | return -EIO; | |
553 | return ret; | |
57773204 MD |
554 | } |
555 | ||
57773204 | 556 | /* |
74d81a6c MD |
557 | * chan_data is allocated internally if this function returns the |
558 | * expected var_len. | |
57773204 | 559 | */ |
74d81a6c | 560 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
561 | void **_chan_data, uint64_t var_len, |
562 | int *_wakeup_fd) | |
57773204 | 563 | { |
74d81a6c | 564 | void *chan_data; |
ff0f5728 | 565 | ssize_t len, nr_fd; |
f5c453e9 | 566 | int wakeup_fd, ret; |
57773204 | 567 | |
fd17d7ce | 568 | if (var_len > LTTNG_UST_ABI_CHANNEL_DATA_MAX_LEN) { |
74d81a6c MD |
569 | len = -EINVAL; |
570 | goto error_check; | |
57773204 | 571 | } |
74d81a6c MD |
572 | /* Receive variable length data */ |
573 | chan_data = zmalloc(var_len); | |
574 | if (!chan_data) { | |
575 | len = -ENOMEM; | |
576 | goto error_alloc; | |
57773204 | 577 | } |
74d81a6c MD |
578 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
579 | if (len != var_len) { | |
580 | goto error_recv; | |
57773204 | 581 | } |
ff0f5728 | 582 | /* recv wakeup fd */ |
6548fca4 | 583 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
584 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
585 | if (nr_fd <= 0) { | |
6548fca4 | 586 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
587 | if (nr_fd < 0) { |
588 | len = nr_fd; | |
589 | goto error_recv; | |
590 | } else { | |
591 | len = -EIO; | |
592 | goto error_recv; | |
593 | } | |
594 | } | |
f5c453e9 JR |
595 | |
596 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
597 | if (ret < 0) { | |
f5c453e9 JR |
598 | ret = close(wakeup_fd); |
599 | if (ret) { | |
600 | PERROR("close on wakeup_fd"); | |
601 | } | |
602 | len = -EIO; | |
20d1999d | 603 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
604 | goto error_recv; |
605 | } | |
606 | ||
607 | *_wakeup_fd = ret; | |
6548fca4 | 608 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 609 | |
74d81a6c MD |
610 | *_chan_data = chan_data; |
611 | return len; | |
612 | ||
613 | error_recv: | |
614 | free(chan_data); | |
615 | error_alloc: | |
616 | error_check: | |
617 | return len; | |
618 | } | |
7bc53e94 | 619 | |
d8d2416d FD |
620 | ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock, |
621 | int *_event_notifier_notif_fd) | |
622 | { | |
623 | ssize_t nr_fd; | |
624 | int event_notifier_notif_fd, ret; | |
625 | ||
626 | /* Receive event_notifier notification fd */ | |
627 | lttng_ust_lock_fd_tracker(); | |
628 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &event_notifier_notif_fd, 1); | |
629 | if (nr_fd <= 0) { | |
630 | lttng_ust_unlock_fd_tracker(); | |
631 | if (nr_fd < 0) { | |
632 | ret = nr_fd; | |
633 | goto error; | |
634 | } else { | |
635 | ret = -EIO; | |
636 | goto error; | |
637 | } | |
638 | } | |
639 | ||
640 | ret = lttng_ust_add_fd_to_tracker(event_notifier_notif_fd); | |
641 | if (ret < 0) { | |
642 | ret = close(event_notifier_notif_fd); | |
643 | if (ret) { | |
644 | PERROR("close on event_notifier notif fd"); | |
645 | } | |
646 | ret = -EIO; | |
647 | lttng_ust_unlock_fd_tracker(); | |
648 | goto error; | |
649 | } | |
650 | ||
651 | *_event_notifier_notif_fd = ret; | |
652 | lttng_ust_unlock_fd_tracker(); | |
653 | ||
654 | ret = nr_fd; | |
655 | ||
656 | error: | |
657 | return ret; | |
658 | } | |
659 | ||
74d81a6c | 660 | int ustcomm_recv_stream_from_sessiond(int sock, |
2208d8b5 | 661 | uint64_t *memory_map_size __attribute__((unused)), |
74d81a6c MD |
662 | int *shm_fd, int *wakeup_fd) |
663 | { | |
664 | ssize_t len; | |
665 | int ret; | |
666 | int fds[2]; | |
667 | ||
668 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 669 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
670 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
671 | if (len <= 0) { | |
6548fca4 | 672 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
673 | if (len < 0) { |
674 | ret = len; | |
675 | goto error; | |
676 | } else { | |
677 | ret = -EIO; | |
678 | goto error; | |
679 | } | |
7bc53e94 | 680 | } |
f5c453e9 JR |
681 | |
682 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
683 | if (ret < 0) { | |
f5c453e9 JR |
684 | ret = close(fds[0]); |
685 | if (ret) { | |
686 | PERROR("close on received shm_fd"); | |
687 | } | |
688 | ret = -EIO; | |
20d1999d | 689 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
690 | goto error; |
691 | } | |
692 | *shm_fd = ret; | |
693 | ||
694 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
695 | if (ret < 0) { | |
f5c453e9 JR |
696 | ret = close(*shm_fd); |
697 | if (ret) { | |
698 | PERROR("close on shm_fd"); | |
699 | } | |
700 | *shm_fd = -1; | |
701 | ret = close(fds[1]); | |
702 | if (ret) { | |
703 | PERROR("close on received wakeup_fd"); | |
704 | } | |
705 | ret = -EIO; | |
20d1999d | 706 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
707 | goto error; |
708 | } | |
709 | *wakeup_fd = ret; | |
6548fca4 | 710 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
711 | return 0; |
712 | ||
713 | error: | |
57773204 MD |
714 | return ret; |
715 | } | |
32ce8569 | 716 | |
ebabbf58 MD |
717 | ssize_t ustcomm_recv_counter_from_sessiond(int sock, |
718 | void **_counter_data, uint64_t var_len) | |
719 | { | |
720 | void *counter_data; | |
721 | ssize_t len; | |
722 | ||
fd17d7ce | 723 | if (var_len > LTTNG_UST_ABI_COUNTER_DATA_MAX_LEN) { |
ebabbf58 MD |
724 | len = -EINVAL; |
725 | goto error_check; | |
726 | } | |
727 | /* Receive variable length data */ | |
728 | counter_data = zmalloc(var_len); | |
729 | if (!counter_data) { | |
730 | len = -ENOMEM; | |
731 | goto error_alloc; | |
732 | } | |
733 | len = ustcomm_recv_unix_sock(sock, counter_data, var_len); | |
734 | if (len != var_len) { | |
735 | goto error_recv; | |
736 | } | |
737 | *_counter_data = counter_data; | |
738 | return len; | |
739 | ||
740 | error_recv: | |
741 | free(counter_data); | |
742 | error_alloc: | |
743 | error_check: | |
744 | return len; | |
745 | } | |
746 | ||
747 | int ustcomm_recv_counter_shm_from_sessiond(int sock, | |
748 | int *shm_fd) | |
749 | { | |
750 | ssize_t len; | |
751 | int ret; | |
752 | int fds[1]; | |
753 | ||
754 | /* recv shm fd fd */ | |
755 | lttng_ust_lock_fd_tracker(); | |
756 | len = ustcomm_recv_fds_unix_sock(sock, fds, 1); | |
757 | if (len <= 0) { | |
758 | lttng_ust_unlock_fd_tracker(); | |
759 | if (len < 0) { | |
760 | ret = len; | |
761 | goto error; | |
762 | } else { | |
763 | ret = -EIO; | |
764 | goto error; | |
765 | } | |
766 | } | |
767 | ||
768 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
769 | if (ret < 0) { | |
770 | ret = close(fds[0]); | |
771 | if (ret) { | |
772 | PERROR("close on received shm_fd"); | |
773 | } | |
774 | ret = -EIO; | |
775 | lttng_ust_unlock_fd_tracker(); | |
776 | goto error; | |
777 | } | |
778 | *shm_fd = ret; | |
779 | lttng_ust_unlock_fd_tracker(); | |
780 | return 0; | |
781 | ||
782 | error: | |
783 | return ret; | |
784 | } | |
785 | ||
32ce8569 MD |
786 | /* |
787 | * Returns 0 on success, negative error value on error. | |
788 | */ | |
789 | int ustcomm_send_reg_msg(int sock, | |
249cffb5 | 790 | enum lttng_ust_ctl_socket_type type, |
32ce8569 MD |
791 | uint32_t bits_per_long, |
792 | uint32_t uint8_t_alignment, | |
793 | uint32_t uint16_t_alignment, | |
794 | uint32_t uint32_t_alignment, | |
795 | uint32_t uint64_t_alignment, | |
796 | uint32_t long_alignment) | |
797 | { | |
798 | ssize_t len; | |
249cffb5 | 799 | struct lttng_ust_ctl_reg_msg reg_msg; |
32ce8569 | 800 | |
fd17d7ce | 801 | reg_msg.magic = LTTNG_UST_ABI_COMM_MAGIC; |
32ce8569 MD |
802 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; |
803 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
804 | reg_msg.pid = getpid(); | |
805 | reg_msg.ppid = getppid(); | |
806 | reg_msg.uid = getuid(); | |
807 | reg_msg.gid = getgid(); | |
808 | reg_msg.bits_per_long = bits_per_long; | |
809 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
810 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
811 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
812 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
813 | reg_msg.long_alignment = long_alignment; | |
814 | reg_msg.socket_type = type; | |
0db3d6ee | 815 | lttng_pthread_getname_np(reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); |
32ce8569 MD |
816 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); |
817 | ||
818 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
819 | if (len > 0 && len != sizeof(reg_msg)) | |
820 | return -EIO; | |
821 | if (len < 0) | |
822 | return len; | |
823 | return 0; | |
824 | } | |
825 | ||
53569322 | 826 | static |
4e48b5d2 | 827 | ssize_t count_one_type(const struct lttng_ust_type_common *lt) |
53569322 | 828 | { |
a084756d MD |
829 | switch (lt->type) { |
830 | case lttng_ust_type_integer: | |
831 | case lttng_ust_type_float: | |
832 | case lttng_ust_type_string: | |
53569322 | 833 | return 1; |
a084756d MD |
834 | case lttng_ust_type_enum: |
835 | return count_one_type(lttng_ust_get_type_enum(lt)->container_type) + 1; | |
836 | case lttng_ust_type_array: | |
837 | return count_one_type(lttng_ust_get_type_array(lt)->elem_type) + 1; | |
838 | case lttng_ust_type_sequence: | |
839 | return count_one_type(lttng_ust_get_type_sequence(lt)->elem_type) + 1; | |
840 | case lttng_ust_type_struct: | |
841 | return count_fields_recursive(lttng_ust_get_type_struct(lt)->nr_fields, | |
842 | lttng_ust_get_type_struct(lt)->fields) + 1; | |
843 | ||
844 | case lttng_ust_type_dynamic: | |
53569322 | 845 | { |
3d33ca1d | 846 | const struct lttng_ust_event_field * const *choices; |
53569322 MD |
847 | size_t nr_choices; |
848 | int ret; | |
849 | ||
850 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
851 | &choices); | |
852 | if (ret) | |
853 | return ret; | |
854 | /* | |
cf22367f | 855 | * Two fields for enum, one field for variant, and |
53569322 MD |
856 | * one field per choice. |
857 | */ | |
cf22367f | 858 | return count_fields_recursive(nr_choices, choices) + 3; |
53569322 | 859 | } |
218deb69 | 860 | |
53569322 MD |
861 | default: |
862 | return -EINVAL; | |
863 | } | |
864 | return 0; | |
865 | } | |
866 | ||
867 | static | |
868 | ssize_t count_fields_recursive(size_t nr_fields, | |
3d33ca1d | 869 | const struct lttng_ust_event_field * const *lttng_fields) |
53569322 MD |
870 | { |
871 | int i; | |
872 | ssize_t ret, count = 0; | |
873 | ||
874 | for (i = 0; i < nr_fields; i++) { | |
25cff019 | 875 | const struct lttng_ust_event_field *lf; |
53569322 | 876 | |
25cff019 | 877 | lf = lttng_fields[i]; |
53569322 MD |
878 | /* skip 'nowrite' fields */ |
879 | if (lf->nowrite) | |
880 | continue; | |
a084756d | 881 | ret = count_one_type(lf->type); |
53569322 MD |
882 | if (ret < 0) |
883 | return ret; /* error */ | |
884 | count += ret; | |
885 | } | |
886 | return count; | |
887 | } | |
888 | ||
889 | static | |
890 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
4e48b5d2 | 891 | struct lttng_ust_ctx_field *lttng_fields) |
53569322 MD |
892 | { |
893 | int i; | |
894 | ssize_t ret, count = 0; | |
895 | ||
896 | for (i = 0; i < nr_fields; i++) { | |
25cff019 | 897 | const struct lttng_ust_event_field *lf; |
53569322 | 898 | |
4e48b5d2 | 899 | lf = lttng_fields[i].event_field; |
53569322 MD |
900 | /* skip 'nowrite' fields */ |
901 | if (lf->nowrite) | |
902 | continue; | |
a084756d | 903 | ret = count_one_type(lf->type); |
53569322 MD |
904 | if (ret < 0) |
905 | return ret; /* error */ | |
906 | count += ret; | |
907 | } | |
908 | return count; | |
909 | } | |
910 | ||
31a85ea9 MD |
911 | static |
912 | int serialize_string_encoding(int32_t *ue, | |
a084756d | 913 | enum lttng_ust_string_encoding le) |
31a85ea9 MD |
914 | { |
915 | switch (le) { | |
a084756d | 916 | case lttng_ust_string_encoding_none: |
249cffb5 | 917 | *ue = lttng_ust_ctl_encode_none; |
31a85ea9 | 918 | break; |
a084756d | 919 | case lttng_ust_string_encoding_UTF8: |
249cffb5 | 920 | *ue = lttng_ust_ctl_encode_UTF8; |
31a85ea9 | 921 | break; |
a084756d | 922 | case lttng_ust_string_encoding_ASCII: |
249cffb5 | 923 | *ue = lttng_ust_ctl_encode_ASCII; |
31a85ea9 MD |
924 | break; |
925 | default: | |
926 | return -EINVAL; | |
927 | } | |
928 | return 0; | |
929 | } | |
930 | ||
931 | static | |
249cffb5 | 932 | int serialize_integer_type(struct lttng_ust_ctl_integer_type *uit, |
a084756d MD |
933 | const struct lttng_ust_type_integer *lit, |
934 | enum lttng_ust_string_encoding lencoding) | |
31a85ea9 MD |
935 | { |
936 | int32_t encoding; | |
937 | ||
938 | uit->size = lit->size; | |
939 | uit->signedness = lit->signedness; | |
940 | uit->reverse_byte_order = lit->reverse_byte_order; | |
941 | uit->base = lit->base; | |
a084756d | 942 | if (serialize_string_encoding(&encoding, lencoding)) |
31a85ea9 MD |
943 | return -EINVAL; |
944 | uit->encoding = encoding; | |
945 | uit->alignment = lit->alignment; | |
946 | return 0; | |
947 | } | |
948 | ||
32ce8569 | 949 | static |
f69fe5fb | 950 | int serialize_dynamic_type(struct lttng_ust_session *session, |
249cffb5 | 951 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
218deb69 | 952 | const char *field_name) |
32ce8569 | 953 | { |
3d33ca1d | 954 | const struct lttng_ust_event_field * const *choices; |
fd17d7ce | 955 | char tag_field_name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
4e48b5d2 MD |
956 | const struct lttng_ust_type_common *tag_type; |
957 | const struct lttng_ust_event_field *tag_field_generic; | |
25cff019 | 958 | struct lttng_ust_event_field tag_field = { |
53569322 MD |
959 | .name = tag_field_name, |
960 | .nowrite = 0, | |
961 | }; | |
249cffb5 | 962 | struct lttng_ust_ctl_field *uf; |
53569322 | 963 | size_t nr_choices, i; |
32ce8569 MD |
964 | int ret; |
965 | ||
53569322 | 966 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
a084756d | 967 | tag_type = tag_field_generic->type; |
53569322 MD |
968 | |
969 | /* Serialize enum field. */ | |
fd17d7ce MD |
970 | strncpy(tag_field_name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
971 | tag_field_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
53569322 MD |
972 | strncat(tag_field_name, |
973 | "_tag", | |
fd17d7ce | 974 | LTTNG_UST_ABI_SYM_NAME_LEN - strlen(tag_field_name) - 1); |
a084756d | 975 | tag_field.type = tag_type; |
53569322 | 976 | ret = serialize_one_field(session, fields, iter_output, |
28db0827 | 977 | &tag_field, NULL); |
53569322 MD |
978 | if (ret) |
979 | return ret; | |
980 | ||
981 | /* Serialize variant field. */ | |
982 | uf = &fields[*iter_output]; | |
983 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
984 | if (ret) | |
985 | return ret; | |
986 | ||
fd17d7ce MD |
987 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
988 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
249cffb5 | 989 | uf->type.atype = lttng_ust_ctl_atype_variant; |
218deb69 MD |
990 | uf->type.u.variant_nestable.nr_choices = nr_choices; |
991 | strncpy(uf->type.u.variant_nestable.tag_name, | |
53569322 | 992 | tag_field_name, |
fd17d7ce MD |
993 | LTTNG_UST_ABI_SYM_NAME_LEN); |
994 | uf->type.u.variant_nestable.tag_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 | 995 | uf->type.u.variant_nestable.alignment = 0; |
53569322 MD |
996 | (*iter_output)++; |
997 | ||
998 | /* Serialize choice fields after variant. */ | |
999 | for (i = 0; i < nr_choices; i++) { | |
1000 | ret = serialize_one_field(session, fields, | |
28db0827 | 1001 | iter_output, choices[i], NULL); |
53569322 MD |
1002 | if (ret) |
1003 | return ret; | |
1004 | } | |
1005 | return 0; | |
1006 | } | |
1007 | ||
1008 | static | |
f69fe5fb | 1009 | int serialize_one_type(struct lttng_ust_session *session, |
249cffb5 | 1010 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
4e48b5d2 | 1011 | const char *field_name, const struct lttng_ust_type_common *lt, |
28db0827 MD |
1012 | enum lttng_ust_string_encoding parent_encoding, |
1013 | const char *prev_field_name) | |
53569322 | 1014 | { |
53569322 MD |
1015 | int ret; |
1016 | ||
218deb69 | 1017 | /* |
249cffb5 | 1018 | * Serializing a type (rather than a field) generates a lttng_ust_ctl_field |
218deb69 MD |
1019 | * entry with 0-length name. |
1020 | */ | |
53569322 | 1021 | |
a084756d MD |
1022 | switch (lt->type) { |
1023 | case lttng_ust_type_integer: | |
31a85ea9 | 1024 | { |
249cffb5 MJ |
1025 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1026 | struct lttng_ust_ctl_type *ut = &uf->type; | |
31a85ea9 MD |
1027 | |
1028 | if (field_name) { | |
fd17d7ce MD |
1029 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1030 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1031 | } else { |
1032 | uf->name[0] = '\0'; | |
1033 | } | |
a084756d MD |
1034 | ret = serialize_integer_type(&ut->u.integer, lttng_ust_get_type_integer(lt), |
1035 | parent_encoding); | |
31a85ea9 MD |
1036 | if (ret) |
1037 | return ret; | |
249cffb5 | 1038 | ut->atype = lttng_ust_ctl_atype_integer; |
31a85ea9 MD |
1039 | (*iter_output)++; |
1040 | break; | |
1041 | } | |
a084756d | 1042 | case lttng_ust_type_float: |
31a85ea9 | 1043 | { |
249cffb5 MJ |
1044 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1045 | struct lttng_ust_ctl_type *ut = &uf->type; | |
1046 | struct lttng_ust_ctl_float_type *uft; | |
4e48b5d2 | 1047 | const struct lttng_ust_type_float *lft; |
31a85ea9 MD |
1048 | |
1049 | if (field_name) { | |
fd17d7ce MD |
1050 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1051 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1052 | } else { |
1053 | uf->name[0] = '\0'; | |
1054 | } | |
1055 | uft = &ut->u._float; | |
a084756d | 1056 | lft = lttng_ust_get_type_float(lt); |
31a85ea9 MD |
1057 | uft->exp_dig = lft->exp_dig; |
1058 | uft->mant_dig = lft->mant_dig; | |
1059 | uft->alignment = lft->alignment; | |
1060 | uft->reverse_byte_order = lft->reverse_byte_order; | |
249cffb5 | 1061 | ut->atype = lttng_ust_ctl_atype_float; |
31a85ea9 MD |
1062 | (*iter_output)++; |
1063 | break; | |
1064 | } | |
a084756d | 1065 | case lttng_ust_type_string: |
31a85ea9 | 1066 | { |
249cffb5 MJ |
1067 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1068 | struct lttng_ust_ctl_type *ut = &uf->type; | |
31a85ea9 MD |
1069 | int32_t encoding; |
1070 | ||
1071 | if (field_name) { | |
fd17d7ce MD |
1072 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1073 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1074 | } else { |
1075 | uf->name[0] = '\0'; | |
1076 | } | |
a084756d | 1077 | ret = serialize_string_encoding(&encoding, lttng_ust_get_type_string(lt)->encoding); |
31a85ea9 MD |
1078 | if (ret) |
1079 | return ret; | |
1080 | ut->u.string.encoding = encoding; | |
249cffb5 | 1081 | ut->atype = lttng_ust_ctl_atype_string; |
31a85ea9 MD |
1082 | (*iter_output)++; |
1083 | break; | |
1084 | } | |
a084756d | 1085 | case lttng_ust_type_array: |
218deb69 | 1086 | { |
249cffb5 MJ |
1087 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1088 | struct lttng_ust_ctl_type *ut = &uf->type; | |
218deb69 MD |
1089 | |
1090 | if (field_name) { | |
fd17d7ce MD |
1091 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1092 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1093 | } else { |
1094 | uf->name[0] = '\0'; | |
1095 | } | |
249cffb5 | 1096 | ut->atype = lttng_ust_ctl_atype_array_nestable; |
a084756d MD |
1097 | ut->u.array_nestable.length = lttng_ust_get_type_array(lt)->length; |
1098 | ut->u.array_nestable.alignment = lttng_ust_get_type_array(lt)->alignment; | |
218deb69 MD |
1099 | (*iter_output)++; |
1100 | ||
1101 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d | 1102 | lttng_ust_get_type_array(lt)->elem_type, |
28db0827 | 1103 | lttng_ust_get_type_array(lt)->encoding, NULL); |
218deb69 MD |
1104 | if (ret) |
1105 | return -EINVAL; | |
1106 | break; | |
1107 | } | |
a084756d | 1108 | case lttng_ust_type_sequence: |
218deb69 | 1109 | { |
249cffb5 MJ |
1110 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1111 | struct lttng_ust_ctl_type *ut = &uf->type; | |
28db0827 | 1112 | const char *length_name = lttng_ust_get_type_sequence(lt)->length_name; |
218deb69 MD |
1113 | |
1114 | if (field_name) { | |
fd17d7ce MD |
1115 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1116 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1117 | } else { |
1118 | uf->name[0] = '\0'; | |
1119 | } | |
249cffb5 | 1120 | ut->atype = lttng_ust_ctl_atype_sequence_nestable; |
28db0827 MD |
1121 | /* |
1122 | * If length_name field is NULL, use the previous field | |
1123 | * as length. | |
1124 | */ | |
1125 | if (!length_name) | |
1126 | length_name = prev_field_name; | |
1127 | if (!length_name) | |
1128 | return -EINVAL; | |
218deb69 | 1129 | strncpy(ut->u.sequence_nestable.length_name, |
28db0827 | 1130 | length_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
fd17d7ce | 1131 | ut->u.sequence_nestable.length_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; |
a084756d | 1132 | ut->u.sequence_nestable.alignment = lttng_ust_get_type_sequence(lt)->alignment; |
218deb69 MD |
1133 | (*iter_output)++; |
1134 | ||
1135 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d | 1136 | lttng_ust_get_type_sequence(lt)->elem_type, |
28db0827 | 1137 | lttng_ust_get_type_sequence(lt)->encoding, NULL); |
218deb69 MD |
1138 | if (ret) |
1139 | return -EINVAL; | |
1140 | break; | |
1141 | } | |
a084756d | 1142 | case lttng_ust_type_dynamic: |
53569322 | 1143 | { |
218deb69 MD |
1144 | ret = serialize_dynamic_type(session, fields, iter_output, |
1145 | field_name); | |
53569322 MD |
1146 | if (ret) |
1147 | return -EINVAL; | |
1148 | break; | |
1149 | } | |
a084756d | 1150 | case lttng_ust_type_struct: |
218deb69 | 1151 | { |
249cffb5 | 1152 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
218deb69 MD |
1153 | |
1154 | if (field_name) { | |
fd17d7ce MD |
1155 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1156 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1157 | } else { |
1158 | uf->name[0] = '\0'; | |
1159 | } | |
249cffb5 | 1160 | uf->type.atype = lttng_ust_ctl_atype_struct_nestable; |
a084756d MD |
1161 | uf->type.u.struct_nestable.nr_fields = lttng_ust_get_type_struct(lt)->nr_fields; |
1162 | uf->type.u.struct_nestable.alignment = lttng_ust_get_type_struct(lt)->alignment; | |
218deb69 MD |
1163 | (*iter_output)++; |
1164 | ||
1165 | ret = serialize_fields(session, fields, iter_output, | |
a084756d MD |
1166 | lttng_ust_get_type_struct(lt)->nr_fields, |
1167 | lttng_ust_get_type_struct(lt)->fields); | |
218deb69 MD |
1168 | if (ret) |
1169 | return -EINVAL; | |
1170 | break; | |
1171 | } | |
a084756d | 1172 | case lttng_ust_type_enum: |
218deb69 | 1173 | { |
249cffb5 MJ |
1174 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1175 | struct lttng_ust_ctl_type *ut = &uf->type; | |
218deb69 MD |
1176 | |
1177 | if (field_name) { | |
fd17d7ce MD |
1178 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1179 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1180 | } else { |
1181 | uf->name[0] = '\0'; | |
1182 | } | |
a084756d | 1183 | strncpy(ut->u.enum_nestable.name, lttng_ust_get_type_enum(lt)->desc->name, |
fd17d7ce MD |
1184 | LTTNG_UST_ABI_SYM_NAME_LEN); |
1185 | ut->u.enum_nestable.name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
249cffb5 | 1186 | ut->atype = lttng_ust_ctl_atype_enum_nestable; |
218deb69 MD |
1187 | (*iter_output)++; |
1188 | ||
1189 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d | 1190 | lttng_ust_get_type_enum(lt)->container_type, |
28db0827 | 1191 | lttng_ust_string_encoding_none, NULL); |
218deb69 MD |
1192 | if (ret) |
1193 | return -EINVAL; | |
1194 | if (session) { | |
1195 | const struct lttng_enum *_enum; | |
1196 | ||
a084756d | 1197 | _enum = lttng_ust_enum_get_from_desc(session, lttng_ust_get_type_enum(lt)->desc); |
218deb69 MD |
1198 | if (!_enum) |
1199 | return -EINVAL; | |
1200 | ut->u.enum_nestable.id = _enum->id; | |
1201 | } else { | |
1202 | ut->u.enum_nestable.id = -1ULL; | |
1203 | } | |
32ce8569 MD |
1204 | break; |
1205 | } | |
32ce8569 MD |
1206 | default: |
1207 | return -EINVAL; | |
1208 | } | |
1209 | return 0; | |
1210 | } | |
1211 | ||
218deb69 | 1212 | static |
f69fe5fb | 1213 | int serialize_one_field(struct lttng_ust_session *session, |
249cffb5 | 1214 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
28db0827 MD |
1215 | const struct lttng_ust_event_field *lf, |
1216 | const char **prev_field_name_p) | |
218deb69 | 1217 | { |
28db0827 MD |
1218 | const char *prev_field_name = NULL; |
1219 | int ret; | |
1220 | ||
218deb69 MD |
1221 | /* skip 'nowrite' fields */ |
1222 | if (lf->nowrite) | |
1223 | return 0; | |
1224 | ||
28db0827 MD |
1225 | if (prev_field_name_p) |
1226 | prev_field_name = *prev_field_name_p; | |
1227 | ret = serialize_one_type(session, fields, iter_output, lf->name, lf->type, | |
1228 | lttng_ust_string_encoding_none, prev_field_name); | |
1229 | if (prev_field_name_p) | |
1230 | *prev_field_name_p = lf->name; | |
1231 | return ret; | |
218deb69 MD |
1232 | } |
1233 | ||
32ce8569 | 1234 | static |
f69fe5fb | 1235 | int serialize_fields(struct lttng_ust_session *session, |
249cffb5 | 1236 | struct lttng_ust_ctl_field *lttng_ust_ctl_fields, |
218deb69 | 1237 | size_t *iter_output, size_t nr_lttng_fields, |
3d33ca1d | 1238 | const struct lttng_ust_event_field * const *lttng_fields) |
218deb69 | 1239 | { |
28db0827 | 1240 | const char *prev_field_name = NULL; |
218deb69 MD |
1241 | int ret; |
1242 | size_t i; | |
1243 | ||
1244 | for (i = 0; i < nr_lttng_fields; i++) { | |
249cffb5 | 1245 | ret = serialize_one_field(session, lttng_ust_ctl_fields, |
28db0827 MD |
1246 | iter_output, lttng_fields[i], |
1247 | &prev_field_name); | |
218deb69 MD |
1248 | if (ret) |
1249 | return ret; | |
1250 | } | |
1251 | return 0; | |
1252 | } | |
1253 | ||
1254 | static | |
f69fe5fb | 1255 | int alloc_serialize_fields(struct lttng_ust_session *session, |
c785c634 | 1256 | size_t *_nr_write_fields, |
249cffb5 | 1257 | struct lttng_ust_ctl_field **lttng_ust_ctl_fields, |
32ce8569 | 1258 | size_t nr_fields, |
3d33ca1d | 1259 | const struct lttng_ust_event_field * const *lttng_fields) |
32ce8569 | 1260 | { |
249cffb5 | 1261 | struct lttng_ust_ctl_field *fields; |
53569322 | 1262 | int ret; |
218deb69 | 1263 | size_t iter_output = 0; |
53569322 MD |
1264 | ssize_t nr_write_fields; |
1265 | ||
1266 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1267 | if (nr_write_fields < 0) { | |
1268 | return (int) nr_write_fields; | |
1269 | } | |
32ce8569 | 1270 | |
53569322 | 1271 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1272 | if (!fields) |
1273 | return -ENOMEM; | |
1274 | ||
218deb69 MD |
1275 | ret = serialize_fields(session, fields, &iter_output, nr_fields, |
1276 | lttng_fields); | |
1277 | if (ret) | |
1278 | goto error_type; | |
32ce8569 MD |
1279 | |
1280 | *_nr_write_fields = nr_write_fields; | |
249cffb5 | 1281 | *lttng_ust_ctl_fields = fields; |
32ce8569 MD |
1282 | return 0; |
1283 | ||
1284 | error_type: | |
1285 | free(fields); | |
1286 | return ret; | |
1287 | } | |
1288 | ||
c785c634 | 1289 | static |
249cffb5 | 1290 | int serialize_entries(struct lttng_ust_ctl_enum_entry **_entries, |
c785c634 | 1291 | size_t nr_entries, |
3d33ca1d | 1292 | const struct lttng_ust_enum_entry * const *lttng_entries) |
c785c634 | 1293 | { |
249cffb5 | 1294 | struct lttng_ust_ctl_enum_entry *entries; |
c785c634 MD |
1295 | int i; |
1296 | ||
1297 | /* Serialize the entries */ | |
1298 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1299 | if (!entries) | |
1300 | return -ENOMEM; | |
1301 | for (i = 0; i < nr_entries; i++) { | |
249cffb5 | 1302 | struct lttng_ust_ctl_enum_entry *uentry; |
891d6b55 | 1303 | const struct lttng_ust_enum_entry *lentry; |
c785c634 MD |
1304 | |
1305 | uentry = &entries[i]; | |
891d6b55 | 1306 | lentry = lttng_entries[i]; |
c785c634 | 1307 | |
a6f80644 MD |
1308 | uentry->start.value = lentry->start.value; |
1309 | uentry->start.signedness = lentry->start.signedness; | |
1310 | uentry->end.value = lentry->end.value; | |
1311 | uentry->end.signedness = lentry->end.signedness; | |
fd17d7ce MD |
1312 | strncpy(uentry->string, lentry->string, LTTNG_UST_ABI_SYM_NAME_LEN); |
1313 | uentry->string[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 | 1314 | |
1a37a873 | 1315 | if (lentry->options & LTTNG_UST_ENUM_ENTRY_OPTION_IS_AUTO) { |
3e762260 | 1316 | uentry->u.extra.options |= |
249cffb5 | 1317 | LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; |
3e762260 | 1318 | } |
c785c634 MD |
1319 | } |
1320 | *_entries = entries; | |
1321 | return 0; | |
1322 | } | |
1323 | ||
83e43212 | 1324 | static |
f69fe5fb | 1325 | int serialize_ctx_fields(struct lttng_ust_session *session, |
53569322 | 1326 | size_t *_nr_write_fields, |
249cffb5 | 1327 | struct lttng_ust_ctl_field **lttng_ust_ctl_fields, |
83e43212 | 1328 | size_t nr_fields, |
4e48b5d2 | 1329 | struct lttng_ust_ctx_field *lttng_fields) |
83e43212 | 1330 | { |
249cffb5 | 1331 | struct lttng_ust_ctl_field *fields; |
28db0827 | 1332 | const char *prev_field_name = NULL; |
53569322 MD |
1333 | size_t i, iter_output = 0; |
1334 | ssize_t nr_write_fields; | |
28db0827 | 1335 | int ret; |
83e43212 | 1336 | |
53569322 MD |
1337 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1338 | lttng_fields); | |
1339 | if (nr_write_fields < 0) { | |
1340 | return (int) nr_write_fields; | |
1341 | } | |
1342 | ||
1343 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1344 | if (!fields) |
1345 | return -ENOMEM; | |
1346 | ||
1347 | for (i = 0; i < nr_fields; i++) { | |
53569322 | 1348 | ret = serialize_one_field(session, fields, &iter_output, |
28db0827 | 1349 | lttng_fields[i].event_field, &prev_field_name); |
83e43212 MD |
1350 | if (ret) |
1351 | goto error_type; | |
83e43212 MD |
1352 | } |
1353 | ||
1354 | *_nr_write_fields = nr_write_fields; | |
249cffb5 | 1355 | *lttng_ust_ctl_fields = fields; |
83e43212 MD |
1356 | return 0; |
1357 | ||
1358 | error_type: | |
1359 | free(fields); | |
1360 | return ret; | |
1361 | } | |
1362 | ||
32ce8569 MD |
1363 | /* |
1364 | * Returns 0 on success, negative error value on error. | |
1365 | */ | |
1366 | int ustcomm_register_event(int sock, | |
f69fe5fb | 1367 | struct lttng_ust_session *session, |
32ce8569 MD |
1368 | int session_objd, /* session descriptor */ |
1369 | int channel_objd, /* channel descriptor */ | |
1370 | const char *event_name, /* event name (input) */ | |
1371 | int loglevel, | |
1372 | const char *signature, /* event signature (input) */ | |
1373 | size_t nr_fields, /* fields */ | |
3d33ca1d | 1374 | const struct lttng_ust_event_field * const *lttng_fields, |
32ce8569 MD |
1375 | const char *model_emf_uri, |
1376 | uint32_t *id) /* event id (output) */ | |
1377 | { | |
1378 | ssize_t len; | |
1379 | struct { | |
1380 | struct ustcomm_notify_hdr header; | |
1381 | struct ustcomm_notify_event_msg m; | |
1382 | } msg; | |
1383 | struct { | |
1384 | struct ustcomm_notify_hdr header; | |
1385 | struct ustcomm_notify_event_reply r; | |
1386 | } reply; | |
1387 | size_t signature_len, fields_len, model_emf_uri_len; | |
249cffb5 | 1388 | struct lttng_ust_ctl_field *fields = NULL; |
32ce8569 MD |
1389 | size_t nr_write_fields = 0; |
1390 | int ret; | |
1391 | ||
1392 | memset(&msg, 0, sizeof(msg)); | |
249cffb5 | 1393 | msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_EVENT; |
32ce8569 MD |
1394 | msg.m.session_objd = session_objd; |
1395 | msg.m.channel_objd = channel_objd; | |
fd17d7ce MD |
1396 | strncpy(msg.m.event_name, event_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1397 | msg.m.event_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
32ce8569 MD |
1398 | msg.m.loglevel = loglevel; |
1399 | signature_len = strlen(signature) + 1; | |
1400 | msg.m.signature_len = signature_len; | |
1401 | ||
1402 | /* Calculate fields len, serialize fields. */ | |
1403 | if (nr_fields > 0) { | |
218deb69 | 1404 | ret = alloc_serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1405 | nr_fields, lttng_fields); |
1406 | if (ret) | |
1407 | return ret; | |
1408 | } | |
1409 | ||
1410 | fields_len = sizeof(*fields) * nr_write_fields; | |
1411 | msg.m.fields_len = fields_len; | |
1412 | if (model_emf_uri) { | |
1413 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1414 | } else { | |
1415 | model_emf_uri_len = 0; | |
1416 | } | |
1417 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1418 | |
32ce8569 MD |
1419 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1420 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1421 | ret = -EIO; |
1422 | goto error_fields; | |
32ce8569 MD |
1423 | } |
1424 | if (len < 0) { | |
c785c634 MD |
1425 | ret = len; |
1426 | goto error_fields; | |
32ce8569 MD |
1427 | } |
1428 | ||
1429 | /* send signature */ | |
1430 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1431 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1432 | ret = -EIO; |
1433 | goto error_fields; | |
32ce8569 MD |
1434 | } |
1435 | if (len < 0) { | |
6b95617c MD |
1436 | ret = len; |
1437 | goto error_fields; | |
32ce8569 MD |
1438 | } |
1439 | ||
1440 | /* send fields */ | |
1441 | if (fields_len > 0) { | |
1442 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1443 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1444 | ret = -EIO; |
1445 | goto error_fields; | |
32ce8569 MD |
1446 | } |
1447 | if (len < 0) { | |
c785c634 MD |
1448 | ret = len; |
1449 | goto error_fields; | |
32ce8569 MD |
1450 | } |
1451 | } | |
6b95617c | 1452 | free(fields); |
32ce8569 MD |
1453 | |
1454 | if (model_emf_uri_len) { | |
1455 | /* send model_emf_uri */ | |
1456 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1457 | model_emf_uri_len); | |
c785c634 | 1458 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1459 | return -EIO; |
c785c634 MD |
1460 | } |
1461 | if (len < 0) { | |
6b95617c | 1462 | return len; |
c785c634 | 1463 | } |
32ce8569 MD |
1464 | } |
1465 | ||
1466 | /* receive reply */ | |
1467 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1468 | switch (len) { | |
1469 | case 0: /* orderly shutdown */ | |
1470 | return -EPIPE; | |
1471 | case sizeof(reply): | |
1472 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1473 | ERR("Unexpected result message command " | |
1474 | "expected: %u vs received: %u\n", | |
1475 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1476 | return -EINVAL; | |
1477 | } | |
1478 | if (reply.r.ret_code > 0) | |
1479 | return -EINVAL; | |
1480 | if (reply.r.ret_code < 0) | |
1481 | return reply.r.ret_code; | |
1482 | *id = reply.r.event_id; | |
1483 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1484 | event_name, reply.r.ret_code, reply.r.event_id); | |
1485 | return 0; | |
1486 | default: | |
1487 | if (len < 0) { | |
1488 | /* Transport level error */ | |
1489 | if (errno == EPIPE || errno == ECONNRESET) | |
1490 | len = -errno; | |
1491 | return len; | |
1492 | } else { | |
1493 | ERR("incorrect message size: %zd\n", len); | |
1494 | return len; | |
1495 | } | |
1496 | } | |
6b95617c | 1497 | /* Unreached. */ |
c785c634 | 1498 | |
6b95617c | 1499 | /* Error path only. */ |
c785c634 MD |
1500 | error_fields: |
1501 | free(fields); | |
1502 | return ret; | |
1503 | } | |
1504 | ||
1505 | /* | |
1506 | * Returns 0 on success, negative error value on error. | |
1507 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1508 | */ | |
1509 | int ustcomm_register_enum(int sock, | |
1510 | int session_objd, /* session descriptor */ | |
1511 | const char *enum_name, /* enum name (input) */ | |
1512 | size_t nr_entries, /* entries */ | |
3d33ca1d | 1513 | const struct lttng_ust_enum_entry * const *lttng_entries, |
c785c634 MD |
1514 | uint64_t *id) |
1515 | { | |
1516 | ssize_t len; | |
1517 | struct { | |
1518 | struct ustcomm_notify_hdr header; | |
1519 | struct ustcomm_notify_enum_msg m; | |
1520 | } msg; | |
1521 | struct { | |
1522 | struct ustcomm_notify_hdr header; | |
1523 | struct ustcomm_notify_enum_reply r; | |
1524 | } reply; | |
1525 | size_t entries_len; | |
249cffb5 | 1526 | struct lttng_ust_ctl_enum_entry *entries = NULL; |
c785c634 MD |
1527 | int ret; |
1528 | ||
1529 | memset(&msg, 0, sizeof(msg)); | |
249cffb5 | 1530 | msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_ENUM; |
c785c634 | 1531 | msg.m.session_objd = session_objd; |
fd17d7ce MD |
1532 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1533 | msg.m.enum_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
c785c634 MD |
1534 | |
1535 | /* Calculate entries len, serialize entries. */ | |
1536 | if (nr_entries > 0) { | |
1537 | ret = serialize_entries(&entries, | |
1538 | nr_entries, lttng_entries); | |
1539 | if (ret) | |
1540 | return ret; | |
1541 | } | |
1542 | ||
1543 | entries_len = sizeof(*entries) * nr_entries; | |
1544 | msg.m.entries_len = entries_len; | |
1545 | ||
1546 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1547 | if (len > 0 && len != sizeof(msg)) { | |
1548 | ret = -EIO; | |
1549 | goto error_entries; | |
1550 | } | |
1551 | if (len < 0) { | |
1552 | ret = len; | |
1553 | goto error_entries; | |
1554 | } | |
1555 | ||
1556 | /* send entries */ | |
1557 | if (entries_len > 0) { | |
1558 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1559 | if (len > 0 && len != entries_len) { | |
1560 | ret = -EIO; | |
1561 | goto error_entries; | |
1562 | } | |
1563 | if (len < 0) { | |
1564 | ret = len; | |
1565 | goto error_entries; | |
1566 | } | |
1567 | } | |
1568 | free(entries); | |
1569 | entries = NULL; | |
1570 | ||
1571 | /* receive reply */ | |
1572 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1573 | switch (len) { | |
1574 | case 0: /* orderly shutdown */ | |
1575 | return -EPIPE; | |
1576 | case sizeof(reply): | |
1577 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1578 | ERR("Unexpected result message command " | |
1579 | "expected: %u vs received: %u\n", | |
1580 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1581 | return -EINVAL; | |
1582 | } | |
1583 | if (reply.r.ret_code > 0) | |
1584 | return -EINVAL; | |
1585 | if (reply.r.ret_code < 0) | |
1586 | return reply.r.ret_code; | |
1587 | *id = reply.r.enum_id; | |
1588 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1589 | enum_name, reply.r.ret_code); | |
1590 | return 0; | |
1591 | default: | |
1592 | if (len < 0) { | |
1593 | /* Transport level error */ | |
1594 | if (errno == EPIPE || errno == ECONNRESET) | |
1595 | len = -errno; | |
1596 | return len; | |
1597 | } else { | |
1598 | ERR("incorrect message size: %zd\n", len); | |
1599 | return len; | |
1600 | } | |
1601 | } | |
1602 | return ret; | |
1603 | ||
1604 | error_entries: | |
1605 | free(entries); | |
1606 | return ret; | |
32ce8569 MD |
1607 | } |
1608 | ||
1609 | /* | |
1610 | * Returns 0 on success, negative error value on error. | |
1611 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1612 | */ | |
1613 | int ustcomm_register_channel(int sock, | |
f69fe5fb | 1614 | struct lttng_ust_session *session, |
32ce8569 MD |
1615 | int session_objd, /* session descriptor */ |
1616 | int channel_objd, /* channel descriptor */ | |
1617 | size_t nr_ctx_fields, | |
4e48b5d2 | 1618 | struct lttng_ust_ctx_field *ctx_fields, |
32ce8569 MD |
1619 | uint32_t *chan_id, /* channel id (output) */ |
1620 | int *header_type) /* header type (output) */ | |
1621 | { | |
1622 | ssize_t len; | |
1623 | struct { | |
1624 | struct ustcomm_notify_hdr header; | |
1625 | struct ustcomm_notify_channel_msg m; | |
1626 | } msg; | |
1627 | struct { | |
1628 | struct ustcomm_notify_hdr header; | |
1629 | struct ustcomm_notify_channel_reply r; | |
1630 | } reply; | |
1631 | size_t fields_len; | |
249cffb5 | 1632 | struct lttng_ust_ctl_field *fields = NULL; |
32ce8569 MD |
1633 | int ret; |
1634 | size_t nr_write_fields = 0; | |
1635 | ||
1636 | memset(&msg, 0, sizeof(msg)); | |
249cffb5 | 1637 | msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_CHANNEL; |
32ce8569 MD |
1638 | msg.m.session_objd = session_objd; |
1639 | msg.m.channel_objd = channel_objd; | |
1640 | ||
1641 | /* Calculate fields len, serialize fields. */ | |
1642 | if (nr_ctx_fields > 0) { | |
53569322 | 1643 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1644 | nr_ctx_fields, ctx_fields); |
1645 | if (ret) | |
1646 | return ret; | |
1647 | } | |
1648 | ||
1649 | fields_len = sizeof(*fields) * nr_write_fields; | |
1650 | msg.m.ctx_fields_len = fields_len; | |
1651 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1652 | if (len > 0 && len != sizeof(msg)) { | |
1653 | free(fields); | |
1654 | return -EIO; | |
1655 | } | |
1656 | if (len < 0) { | |
1657 | free(fields); | |
1658 | return len; | |
1659 | } | |
1660 | ||
1661 | /* send fields */ | |
1662 | if (fields_len > 0) { | |
1663 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1664 | free(fields); | |
1665 | if (len > 0 && len != fields_len) { | |
1666 | return -EIO; | |
1667 | } | |
1668 | if (len < 0) { | |
1669 | return len; | |
1670 | } | |
17ea789c MD |
1671 | } else { |
1672 | free(fields); | |
32ce8569 MD |
1673 | } |
1674 | ||
1675 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1676 | switch (len) { | |
1677 | case 0: /* orderly shutdown */ | |
1678 | return -EPIPE; | |
1679 | case sizeof(reply): | |
1680 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1681 | ERR("Unexpected result message command " | |
1682 | "expected: %u vs received: %u\n", | |
1683 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1684 | return -EINVAL; | |
1685 | } | |
1686 | if (reply.r.ret_code > 0) | |
1687 | return -EINVAL; | |
1688 | if (reply.r.ret_code < 0) | |
1689 | return reply.r.ret_code; | |
1690 | *chan_id = reply.r.chan_id; | |
1691 | switch (reply.r.header_type) { | |
1692 | case 1: | |
1693 | case 2: | |
1694 | *header_type = reply.r.header_type; | |
1695 | break; | |
1696 | default: | |
1697 | ERR("Unexpected channel header type %u\n", | |
1698 | reply.r.header_type); | |
1699 | return -EINVAL; | |
1700 | } | |
1701 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1702 | reply.r.chan_id, reply.r.header_type); | |
1703 | return 0; | |
1704 | default: | |
1705 | if (len < 0) { | |
1706 | /* Transport level error */ | |
1707 | if (errno == EPIPE || errno == ECONNRESET) | |
1708 | len = -errno; | |
1709 | return len; | |
1710 | } else { | |
1711 | ERR("incorrect message size: %zd\n", len); | |
1712 | return len; | |
1713 | } | |
1714 | } | |
1715 | } | |
ff517991 MD |
1716 | |
1717 | /* | |
1718 | * Set socket reciving timeout. | |
1719 | */ | |
1720 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1721 | { | |
1722 | int ret; | |
1723 | struct timeval tv; | |
1724 | ||
1725 | tv.tv_sec = msec / 1000; | |
1726 | tv.tv_usec = (msec * 1000 % 1000000); | |
1727 | ||
1728 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1729 | if (ret < 0) { | |
1730 | PERROR("setsockopt SO_RCVTIMEO"); | |
1731 | ret = -errno; | |
1732 | } | |
1733 | ||
1734 | return ret; | |
1735 | } | |
1736 | ||
1737 | /* | |
1738 | * Set socket sending timeout. | |
1739 | */ | |
1740 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1741 | { | |
1742 | int ret; | |
1743 | struct timeval tv; | |
1744 | ||
1745 | tv.tv_sec = msec / 1000; | |
1746 | tv.tv_usec = (msec * 1000) % 1000000; | |
1747 | ||
1748 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1749 | if (ret < 0) { | |
1750 | PERROR("setsockopt SO_SNDTIMEO"); | |
1751 | ret = -errno; | |
1752 | } | |
1753 | ||
1754 | return ret; | |
1755 | } |