Commit | Line | Data |
---|---|---|
67c5b804 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
67c5b804 | 3 | * |
2137460a | 4 | * Copyright (C) 2011 EfficiOS Inc. |
c0c0989a | 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> |
b187bcd5 | 21 | #include <inttypes.h> |
67c5b804 | 22 | |
32ce8569 | 23 | #include <lttng/ust-ctl.h> |
9d315d6d MJ |
24 | #include "common/ustcomm.h" |
25 | #include "common/ust-fd.h" | |
26 | #include "common/macros.h" | |
9d315d6d MJ |
27 | #include "common/dynamic-type.h" |
28 | #include "common/logging.h" | |
32ce8569 | 29 | |
36c52fff | 30 | #include "common/events.h" |
27b98e6c | 31 | #include "common/compat/pthread.h" |
7bc53e94 | 32 | |
74d81a6c MD |
33 | #define USTCOMM_MAX_SEND_FDS 4 |
34 | ||
53569322 MD |
35 | static |
36 | ssize_t count_fields_recursive(size_t nr_fields, | |
3d33ca1d | 37 | const struct lttng_ust_event_field * const *lttng_fields); |
53569322 | 38 | static |
f69fe5fb | 39 | int serialize_one_field(struct lttng_ust_session *session, |
249cffb5 | 40 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
28db0827 MD |
41 | const struct lttng_ust_event_field *lf, |
42 | const char **prev_field_name); | |
218deb69 | 43 | static |
f69fe5fb | 44 | int serialize_fields(struct lttng_ust_session *session, |
249cffb5 | 45 | struct lttng_ust_ctl_field *lttng_ust_ctl_fields, |
218deb69 | 46 | size_t *iter_output, size_t nr_lttng_fields, |
3d33ca1d | 47 | const struct lttng_ust_event_field * const *lttng_fields); |
53569322 | 48 | |
67c5b804 | 49 | /* |
74d81a6c | 50 | * ustcomm_connect_unix_sock |
67c5b804 | 51 | * |
74d81a6c | 52 | * Connect to unix socket using the path name. |
6548fca4 MD |
53 | * |
54 | * Caller handles FD tracker. | |
67c5b804 | 55 | */ |
451d66b2 | 56 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
57 | { |
58 | struct sockaddr_un sun; | |
7bc53e94 | 59 | int fd, ret; |
67c5b804 | 60 | |
204d45df MD |
61 | /* |
62 | * libust threads require the close-on-exec flag for all | |
63 | * resources so it does not leak file descriptors upon exec. | |
64 | */ | |
8a8c2117 | 65 | fd = socket(PF_UNIX, SOCK_STREAM | SOCK_CLOEXEC, 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 | } | |
67c5b804 MD |
80 | |
81 | memset(&sun, 0, sizeof(sun)); | |
82 | sun.sun_family = AF_UNIX; | |
83 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
84 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
85 | ||
a34c2ec0 | 86 | DBG("Connecting to '%s'", sun.sun_path); |
67c5b804 MD |
87 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); |
88 | if (ret < 0) { | |
89 | /* | |
0b9aa170 MD |
90 | * Don't print message on connect ENOENT error, because |
91 | * connect is used in normal execution to detect if | |
92 | * sessiond is alive. ENOENT is when the unix socket | |
93 | * file does not exist, and ECONNREFUSED is when the | |
94 | * file exists but no sessiond is listening. | |
67c5b804 | 95 | */ |
0b9aa170 | 96 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 97 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 98 | PERROR("connect"); |
7bc53e94 | 99 | ret = -errno; |
8cf811d3 MD |
100 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
101 | ret = -EPIPE; | |
67c5b804 MD |
102 | goto error_connect; |
103 | } | |
104 | ||
105 | return fd; | |
106 | ||
107 | error_connect: | |
7bc53e94 MD |
108 | { |
109 | int closeret; | |
110 | ||
111 | closeret = close(fd); | |
112 | if (closeret) | |
32ce8569 | 113 | PERROR("close"); |
7bc53e94 | 114 | } |
67c5b804 MD |
115 | error: |
116 | return ret; | |
117 | } | |
118 | ||
119 | /* | |
74d81a6c | 120 | * ustcomm_accept_unix_sock |
67c5b804 | 121 | * |
74d81a6c MD |
122 | * Do an accept(2) on the sock and return the |
123 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 124 | */ |
57773204 | 125 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
126 | { |
127 | int new_fd; | |
128 | struct sockaddr_un sun; | |
129 | socklen_t len = 0; | |
130 | ||
131 | /* Blocking call */ | |
132 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
133 | if (new_fd < 0) { | |
b869b5ae MD |
134 | if (errno != ECONNABORTED) |
135 | PERROR("accept"); | |
136 | new_fd = -errno; | |
137 | if (new_fd == -ECONNABORTED) | |
138 | new_fd = -EPIPE; | |
67c5b804 | 139 | } |
67c5b804 | 140 | return new_fd; |
67c5b804 MD |
141 | } |
142 | ||
143 | /* | |
74d81a6c | 144 | * ustcomm_create_unix_sock |
67c5b804 | 145 | * |
74d81a6c MD |
146 | * Creates a AF_UNIX local socket using pathname |
147 | * bind the socket upon creation and return the fd. | |
67c5b804 | 148 | */ |
57773204 | 149 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
150 | { |
151 | struct sockaddr_un sun; | |
7bc53e94 | 152 | int fd, ret; |
67c5b804 MD |
153 | |
154 | /* Create server socket */ | |
155 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 156 | PERROR("socket"); |
7bc53e94 | 157 | ret = -errno; |
67c5b804 MD |
158 | goto error; |
159 | } | |
160 | ||
161 | memset(&sun, 0, sizeof(sun)); | |
162 | sun.sun_family = AF_UNIX; | |
163 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
164 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
165 | ||
166 | /* Unlink the old file if present */ | |
167 | (void) unlink(pathname); | |
168 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
169 | if (ret < 0) { | |
32ce8569 | 170 | PERROR("bind"); |
7bc53e94 MD |
171 | ret = -errno; |
172 | goto error_close; | |
67c5b804 MD |
173 | } |
174 | ||
175 | return fd; | |
176 | ||
7bc53e94 MD |
177 | error_close: |
178 | { | |
179 | int closeret; | |
180 | ||
181 | closeret = close(fd); | |
182 | if (closeret) { | |
32ce8569 | 183 | PERROR("close"); |
7bc53e94 MD |
184 | } |
185 | } | |
67c5b804 MD |
186 | error: |
187 | return ret; | |
188 | } | |
189 | ||
190 | /* | |
74d81a6c | 191 | * ustcomm_listen_unix_sock |
67c5b804 | 192 | * |
74d81a6c | 193 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 194 | */ |
57773204 | 195 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
196 | { |
197 | int ret; | |
198 | ||
e41474be | 199 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 200 | if (ret < 0) { |
7bc53e94 | 201 | ret = -errno; |
32ce8569 | 202 | PERROR("listen"); |
67c5b804 MD |
203 | } |
204 | ||
205 | return ret; | |
206 | } | |
207 | ||
208 | /* | |
74d81a6c MD |
209 | * ustcomm_close_unix_sock |
210 | * | |
b2be0f7b | 211 | * Close unix socket. |
6548fca4 MD |
212 | * |
213 | * Handles fd tracker internally. | |
74d81a6c MD |
214 | */ |
215 | int ustcomm_close_unix_sock(int sock) | |
216 | { | |
217 | int ret; | |
218 | ||
6548fca4 | 219 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 220 | ret = close(sock); |
6548fca4 MD |
221 | if (!ret) { |
222 | lttng_ust_delete_fd_from_tracker(sock); | |
223 | } else { | |
32ce8569 | 224 | PERROR("close"); |
74d81a6c MD |
225 | ret = -errno; |
226 | } | |
6548fca4 | 227 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
228 | |
229 | return ret; | |
230 | } | |
231 | ||
b2be0f7b MD |
232 | /* |
233 | * ustcomm_shutdown_unix_sock | |
234 | * | |
235 | * Shutdown unix socket. Keeps the file descriptor open, but shutdown | |
236 | * communication. | |
237 | */ | |
238 | int ustcomm_shutdown_unix_sock(int sock) | |
239 | { | |
240 | int ret; | |
241 | ||
242 | ret = shutdown(sock, SHUT_RDWR); | |
243 | if (ret) { | |
244 | PERROR("Socket shutdown error"); | |
245 | ret = -errno; | |
246 | } | |
247 | return ret; | |
248 | } | |
249 | ||
74d81a6c MD |
250 | /* |
251 | * ustcomm_recv_unix_sock | |
67c5b804 | 252 | * |
74d81a6c MD |
253 | * Receive data of size len in put that data into |
254 | * the buf param. Using recvmsg API. | |
255 | * Return the size of received data. | |
256 | * Return 0 on orderly shutdown. | |
67c5b804 | 257 | */ |
57773204 | 258 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 259 | { |
913b87f1 | 260 | struct msghdr msg; |
67c5b804 | 261 | struct iovec iov[1]; |
89c5b6ec MD |
262 | ssize_t ret = -1; |
263 | size_t len_last; | |
67c5b804 | 264 | |
913b87f1 MD |
265 | memset(&msg, 0, sizeof(msg)); |
266 | ||
67c5b804 MD |
267 | iov[0].iov_base = buf; |
268 | iov[0].iov_len = len; | |
269 | msg.msg_iov = iov; | |
270 | msg.msg_iovlen = 1; | |
271 | ||
7e3cfcbe | 272 | do { |
89c5b6ec | 273 | len_last = iov[0].iov_len; |
7e3cfcbe | 274 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
275 | if (ret > 0) { |
276 | iov[0].iov_base += ret; | |
277 | iov[0].iov_len -= ret; | |
278 | assert(ret <= len_last); | |
279 | } | |
280 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
281 | |
282 | if (ret < 0) { | |
8cf811d3 | 283 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 284 | PERROR("recvmsg"); |
7bc53e94 | 285 | ret = -errno; |
8cf811d3 | 286 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 287 | ret = -EPIPE; |
7bc53e94 | 288 | |
b2be0f7b | 289 | (void) ustcomm_shutdown_unix_sock(sock); |
89c5b6ec MD |
290 | } else if (ret > 0) { |
291 | ret = len; | |
67c5b804 | 292 | } |
89c5b6ec | 293 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
294 | |
295 | return ret; | |
296 | } | |
297 | ||
298 | /* | |
74d81a6c | 299 | * ustcomm_send_unix_sock |
67c5b804 | 300 | * |
74d81a6c MD |
301 | * Send buf data of size len. Using sendmsg API. |
302 | * Return the size of sent data. | |
67c5b804 | 303 | */ |
32ce8569 | 304 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 305 | { |
913b87f1 | 306 | struct msghdr msg; |
67c5b804 | 307 | struct iovec iov[1]; |
7bc53e94 | 308 | ssize_t ret; |
67c5b804 | 309 | |
913b87f1 MD |
310 | memset(&msg, 0, sizeof(msg)); |
311 | ||
32ce8569 | 312 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
313 | iov[0].iov_len = len; |
314 | msg.msg_iov = iov; | |
315 | msg.msg_iovlen = 1; | |
316 | ||
1ea11eab MD |
317 | /* |
318 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
319 | * libust, so libust does not receive an unhandled SIGPIPE or | |
320 | * SIGURG. The sessiond receiver side can be made more resilient | |
321 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
322 | * libust side. | |
323 | */ | |
51d9d699 MD |
324 | do { |
325 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
326 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
327 | |
328 | if (ret < 0) { | |
74d81a6c | 329 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 330 | PERROR("sendmsg"); |
7bc53e94 | 331 | ret = -errno; |
b869b5ae MD |
332 | if (ret == -ECONNRESET) |
333 | ret = -EPIPE; | |
7bc53e94 | 334 | |
b2be0f7b | 335 | (void) ustcomm_shutdown_unix_sock(sock); |
67c5b804 MD |
336 | } |
337 | ||
338 | return ret; | |
339 | } | |
340 | ||
341 | /* | |
74d81a6c | 342 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 343 | * |
74d81a6c | 344 | * Returns the size of data sent, or negative error value. |
67c5b804 | 345 | */ |
74d81a6c | 346 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 347 | { |
913b87f1 | 348 | struct msghdr msg; |
67c5b804 MD |
349 | struct cmsghdr *cmptr; |
350 | struct iovec iov[1]; | |
351 | ssize_t ret = -1; | |
352 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
353 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 354 | char dummy = 0; |
67c5b804 | 355 | |
913b87f1 | 356 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 357 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 358 | |
74d81a6c MD |
359 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
360 | return -EINVAL; | |
67c5b804 MD |
361 | |
362 | msg.msg_control = (caddr_t)tmp; | |
363 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
364 | ||
365 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
366 | if (!cmptr) |
367 | return -EINVAL; | |
67c5b804 MD |
368 | cmptr->cmsg_level = SOL_SOCKET; |
369 | cmptr->cmsg_type = SCM_RIGHTS; | |
370 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
371 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
372 | /* Sum of the length of all control messages in the buffer: */ | |
373 | msg.msg_controllen = cmptr->cmsg_len; | |
374 | ||
74d81a6c MD |
375 | iov[0].iov_base = &dummy; |
376 | iov[0].iov_len = 1; | |
67c5b804 MD |
377 | msg.msg_iov = iov; |
378 | msg.msg_iovlen = 1; | |
379 | ||
51d9d699 | 380 | do { |
0dafcd63 | 381 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 382 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 383 | if (ret < 0) { |
74d81a6c MD |
384 | /* |
385 | * We consider EPIPE and ECONNRESET as expected. | |
386 | */ | |
387 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 388 | PERROR("sendmsg"); |
74d81a6c | 389 | } |
b869b5ae MD |
390 | ret = -errno; |
391 | if (ret == -ECONNRESET) | |
392 | ret = -EPIPE; | |
74d81a6c MD |
393 | } |
394 | return ret; | |
395 | } | |
7bc53e94 | 396 | |
74d81a6c MD |
397 | /* |
398 | * Recv a message accompanied by fd(s) from a unix socket. | |
399 | * | |
74d81a6c MD |
400 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
401 | * actually received in nb_fd. | |
402 | * Returns -EPIPE on orderly shutdown. | |
403 | */ | |
404 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
405 | { | |
406 | struct iovec iov[1]; | |
407 | ssize_t ret = 0; | |
408 | struct cmsghdr *cmsg; | |
409 | size_t sizeof_fds = nb_fd * sizeof(int); | |
410 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
411 | struct msghdr msg; | |
412 | char dummy; | |
7bc53e94 | 413 | |
74d81a6c | 414 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 415 | |
74d81a6c MD |
416 | /* Prepare to receive the structures */ |
417 | iov[0].iov_base = &dummy; | |
418 | iov[0].iov_len = 1; | |
419 | msg.msg_iov = iov; | |
420 | msg.msg_iovlen = 1; | |
421 | msg.msg_control = recv_fd; | |
422 | msg.msg_controllen = sizeof(recv_fd); | |
423 | ||
424 | do { | |
8a8c2117 | 425 | ret = recvmsg(sock, &msg, MSG_CMSG_CLOEXEC); |
74d81a6c MD |
426 | } while (ret < 0 && errno == EINTR); |
427 | if (ret < 0) { | |
428 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 429 | PERROR("recvmsg fds"); |
74d81a6c | 430 | } |
8cf811d3 | 431 | ret = -errno; |
b869b5ae MD |
432 | if (ret == -ECONNRESET) |
433 | ret = -EPIPE; | |
74d81a6c MD |
434 | goto end; |
435 | } | |
436 | if (ret == 0) { | |
437 | /* orderly shutdown */ | |
438 | ret = -EPIPE; | |
439 | goto end; | |
440 | } | |
441 | if (ret != 1) { | |
32ce8569 | 442 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
443 | ret, 1); |
444 | goto end; | |
445 | } | |
446 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 447 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
448 | ret = -1; |
449 | goto end; | |
450 | } | |
451 | cmsg = CMSG_FIRSTHDR(&msg); | |
452 | if (!cmsg) { | |
32ce8569 | 453 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
454 | ret = -1; |
455 | goto end; | |
456 | } | |
457 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 458 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
459 | ret = -1; |
460 | goto end; | |
461 | } | |
462 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 463 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
464 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
465 | ret = -1; | |
466 | goto end; | |
467 | } | |
6daf0c26 | 468 | |
74d81a6c | 469 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); |
6daf0c26 | 470 | |
6b32a5c3 | 471 | ret = nb_fd; |
74d81a6c | 472 | end: |
67c5b804 MD |
473 | return ret; |
474 | } | |
57773204 MD |
475 | |
476 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
477 | { | |
478 | ssize_t len; | |
479 | ||
480 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
481 | switch (len) { | |
482 | case sizeof(*lum): | |
57773204 | 483 | break; |
57773204 | 484 | default: |
7bc53e94 | 485 | if (len < 0) { |
7bc53e94 MD |
486 | return len; |
487 | } else { | |
32ce8569 | 488 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
489 | return -EINVAL; |
490 | } | |
57773204 MD |
491 | } |
492 | return 0; | |
493 | } | |
494 | ||
495 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
496 | uint32_t expected_handle, uint32_t expected_cmd) | |
497 | { | |
498 | ssize_t len; | |
499 | ||
500 | memset(lur, 0, sizeof(*lur)); | |
501 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
502 | switch (len) { | |
503 | case 0: /* orderly shutdown */ | |
74d81a6c | 504 | return -EPIPE; |
57773204 | 505 | case sizeof(*lur): |
5dafeeaa MD |
506 | { |
507 | int err = 0; | |
508 | ||
57773204 | 509 | if (lur->handle != expected_handle) { |
32ce8569 | 510 | ERR("Unexpected result message handle: " |
74d81a6c MD |
511 | "expected: %u vs received: %u\n", |
512 | expected_handle, lur->handle); | |
5dafeeaa | 513 | err = 1; |
57773204 | 514 | } |
57773204 | 515 | if (lur->cmd != expected_cmd) { |
32ce8569 | 516 | ERR("Unexpected result message command " |
74d81a6c MD |
517 | "expected: %u vs received: %u\n", |
518 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
519 | err = 1; |
520 | } | |
521 | if (err) { | |
57773204 | 522 | return -EINVAL; |
5dafeeaa MD |
523 | } else { |
524 | return lur->ret_code; | |
57773204 | 525 | } |
5dafeeaa | 526 | } |
57773204 | 527 | default: |
8cf811d3 | 528 | if (len >= 0) { |
32ce8569 | 529 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 530 | } |
8cf811d3 | 531 | return len; |
57773204 MD |
532 | } |
533 | } | |
534 | ||
535 | int ustcomm_send_app_cmd(int sock, | |
536 | struct ustcomm_ust_msg *lum, | |
537 | struct ustcomm_ust_reply *lur) | |
538 | { | |
539 | int ret; | |
540 | ||
541 | ret = ustcomm_send_app_msg(sock, lum); | |
542 | if (ret) | |
543 | return ret; | |
c354a72c MD |
544 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
545 | if (ret > 0) | |
546 | return -EIO; | |
547 | return ret; | |
57773204 MD |
548 | } |
549 | ||
57773204 | 550 | /* |
74d81a6c MD |
551 | * chan_data is allocated internally if this function returns the |
552 | * expected var_len. | |
57773204 | 553 | */ |
74d81a6c | 554 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
555 | void **_chan_data, uint64_t var_len, |
556 | int *_wakeup_fd) | |
57773204 | 557 | { |
74d81a6c | 558 | void *chan_data; |
ff0f5728 | 559 | ssize_t len, nr_fd; |
f5c453e9 | 560 | int wakeup_fd, ret; |
57773204 | 561 | |
fd17d7ce | 562 | if (var_len > LTTNG_UST_ABI_CHANNEL_DATA_MAX_LEN) { |
74d81a6c MD |
563 | len = -EINVAL; |
564 | goto error_check; | |
57773204 | 565 | } |
74d81a6c MD |
566 | /* Receive variable length data */ |
567 | chan_data = zmalloc(var_len); | |
568 | if (!chan_data) { | |
569 | len = -ENOMEM; | |
570 | goto error_alloc; | |
57773204 | 571 | } |
74d81a6c MD |
572 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
573 | if (len != var_len) { | |
574 | goto error_recv; | |
57773204 | 575 | } |
ff0f5728 | 576 | /* recv wakeup fd */ |
6548fca4 | 577 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
578 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
579 | if (nr_fd <= 0) { | |
6548fca4 | 580 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
581 | if (nr_fd < 0) { |
582 | len = nr_fd; | |
583 | goto error_recv; | |
584 | } else { | |
585 | len = -EIO; | |
586 | goto error_recv; | |
587 | } | |
588 | } | |
f5c453e9 JR |
589 | |
590 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
591 | if (ret < 0) { | |
f5c453e9 JR |
592 | ret = close(wakeup_fd); |
593 | if (ret) { | |
594 | PERROR("close on wakeup_fd"); | |
595 | } | |
596 | len = -EIO; | |
20d1999d | 597 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
598 | goto error_recv; |
599 | } | |
600 | ||
601 | *_wakeup_fd = ret; | |
6548fca4 | 602 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 603 | |
74d81a6c MD |
604 | *_chan_data = chan_data; |
605 | return len; | |
606 | ||
607 | error_recv: | |
608 | free(chan_data); | |
609 | error_alloc: | |
610 | error_check: | |
611 | return len; | |
612 | } | |
7bc53e94 | 613 | |
d8d2416d FD |
614 | ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock, |
615 | int *_event_notifier_notif_fd) | |
616 | { | |
617 | ssize_t nr_fd; | |
618 | int event_notifier_notif_fd, ret; | |
619 | ||
620 | /* Receive event_notifier notification fd */ | |
621 | lttng_ust_lock_fd_tracker(); | |
622 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &event_notifier_notif_fd, 1); | |
623 | if (nr_fd <= 0) { | |
624 | lttng_ust_unlock_fd_tracker(); | |
625 | if (nr_fd < 0) { | |
626 | ret = nr_fd; | |
627 | goto error; | |
628 | } else { | |
629 | ret = -EIO; | |
630 | goto error; | |
631 | } | |
632 | } | |
633 | ||
634 | ret = lttng_ust_add_fd_to_tracker(event_notifier_notif_fd); | |
635 | if (ret < 0) { | |
636 | ret = close(event_notifier_notif_fd); | |
637 | if (ret) { | |
638 | PERROR("close on event_notifier notif fd"); | |
639 | } | |
640 | ret = -EIO; | |
641 | lttng_ust_unlock_fd_tracker(); | |
642 | goto error; | |
643 | } | |
644 | ||
645 | *_event_notifier_notif_fd = ret; | |
646 | lttng_ust_unlock_fd_tracker(); | |
647 | ||
648 | ret = nr_fd; | |
649 | ||
650 | error: | |
651 | return ret; | |
652 | } | |
653 | ||
74d81a6c | 654 | int ustcomm_recv_stream_from_sessiond(int sock, |
2208d8b5 | 655 | uint64_t *memory_map_size __attribute__((unused)), |
74d81a6c MD |
656 | int *shm_fd, int *wakeup_fd) |
657 | { | |
658 | ssize_t len; | |
659 | int ret; | |
660 | int fds[2]; | |
661 | ||
662 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 663 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
664 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
665 | if (len <= 0) { | |
6548fca4 | 666 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
667 | if (len < 0) { |
668 | ret = len; | |
669 | goto error; | |
670 | } else { | |
671 | ret = -EIO; | |
672 | goto error; | |
673 | } | |
7bc53e94 | 674 | } |
f5c453e9 JR |
675 | |
676 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
677 | if (ret < 0) { | |
f5c453e9 JR |
678 | ret = close(fds[0]); |
679 | if (ret) { | |
680 | PERROR("close on received shm_fd"); | |
681 | } | |
682 | ret = -EIO; | |
20d1999d | 683 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
684 | goto error; |
685 | } | |
686 | *shm_fd = ret; | |
687 | ||
688 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
689 | if (ret < 0) { | |
f5c453e9 JR |
690 | ret = close(*shm_fd); |
691 | if (ret) { | |
692 | PERROR("close on shm_fd"); | |
693 | } | |
694 | *shm_fd = -1; | |
695 | ret = close(fds[1]); | |
696 | if (ret) { | |
697 | PERROR("close on received wakeup_fd"); | |
698 | } | |
699 | ret = -EIO; | |
20d1999d | 700 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
701 | goto error; |
702 | } | |
703 | *wakeup_fd = ret; | |
6548fca4 | 704 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
705 | return 0; |
706 | ||
707 | error: | |
57773204 MD |
708 | return ret; |
709 | } | |
32ce8569 | 710 | |
428d8ee5 MD |
711 | ssize_t ustcomm_recv_var_len_cmd_from_sessiond(int sock, |
712 | void **_data, uint32_t var_len) | |
ebabbf58 | 713 | { |
428d8ee5 | 714 | void *data; |
ebabbf58 MD |
715 | ssize_t len; |
716 | ||
428d8ee5 | 717 | if (var_len > LTTNG_UST_ABI_CMD_MAX_LEN) { |
ebabbf58 MD |
718 | len = -EINVAL; |
719 | goto error_check; | |
720 | } | |
721 | /* Receive variable length data */ | |
428d8ee5 MD |
722 | data = zmalloc(var_len); |
723 | if (!data) { | |
ebabbf58 MD |
724 | len = -ENOMEM; |
725 | goto error_alloc; | |
726 | } | |
428d8ee5 | 727 | len = ustcomm_recv_unix_sock(sock, data, var_len); |
ebabbf58 MD |
728 | if (len != var_len) { |
729 | goto error_recv; | |
730 | } | |
428d8ee5 | 731 | *_data = data; |
ebabbf58 MD |
732 | return len; |
733 | ||
734 | error_recv: | |
428d8ee5 | 735 | free(data); |
ebabbf58 MD |
736 | error_alloc: |
737 | error_check: | |
738 | return len; | |
739 | } | |
740 | ||
741 | int ustcomm_recv_counter_shm_from_sessiond(int sock, | |
742 | int *shm_fd) | |
743 | { | |
744 | ssize_t len; | |
745 | int ret; | |
746 | int fds[1]; | |
747 | ||
748 | /* recv shm fd fd */ | |
749 | lttng_ust_lock_fd_tracker(); | |
750 | len = ustcomm_recv_fds_unix_sock(sock, fds, 1); | |
751 | if (len <= 0) { | |
752 | lttng_ust_unlock_fd_tracker(); | |
753 | if (len < 0) { | |
754 | ret = len; | |
755 | goto error; | |
756 | } else { | |
757 | ret = -EIO; | |
758 | goto error; | |
759 | } | |
760 | } | |
761 | ||
762 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
763 | if (ret < 0) { | |
764 | ret = close(fds[0]); | |
765 | if (ret) { | |
766 | PERROR("close on received shm_fd"); | |
767 | } | |
768 | ret = -EIO; | |
769 | lttng_ust_unlock_fd_tracker(); | |
770 | goto error; | |
771 | } | |
772 | *shm_fd = ret; | |
773 | lttng_ust_unlock_fd_tracker(); | |
774 | return 0; | |
775 | ||
776 | error: | |
777 | return ret; | |
778 | } | |
779 | ||
32ce8569 MD |
780 | /* |
781 | * Returns 0 on success, negative error value on error. | |
782 | */ | |
783 | int ustcomm_send_reg_msg(int sock, | |
249cffb5 | 784 | enum lttng_ust_ctl_socket_type type, |
32ce8569 MD |
785 | uint32_t bits_per_long, |
786 | uint32_t uint8_t_alignment, | |
787 | uint32_t uint16_t_alignment, | |
788 | uint32_t uint32_t_alignment, | |
789 | uint32_t uint64_t_alignment, | |
c117e988 JG |
790 | uint32_t long_alignment, |
791 | const char *procname) | |
32ce8569 MD |
792 | { |
793 | ssize_t len; | |
249cffb5 | 794 | struct lttng_ust_ctl_reg_msg reg_msg; |
32ce8569 | 795 | |
fd17d7ce | 796 | reg_msg.magic = LTTNG_UST_ABI_COMM_MAGIC; |
32ce8569 MD |
797 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; |
798 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
799 | reg_msg.pid = getpid(); | |
800 | reg_msg.ppid = getppid(); | |
801 | reg_msg.uid = getuid(); | |
802 | reg_msg.gid = getgid(); | |
803 | reg_msg.bits_per_long = bits_per_long; | |
804 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
805 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
806 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
807 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
808 | reg_msg.long_alignment = long_alignment; | |
809 | reg_msg.socket_type = type; | |
c117e988 JG |
810 | memset(reg_msg.name, 0, sizeof(reg_msg.name)); |
811 | strncpy(reg_msg.name, procname, sizeof(reg_msg.name) - 1); | |
32ce8569 MD |
812 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); |
813 | ||
814 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
815 | if (len > 0 && len != sizeof(reg_msg)) | |
816 | return -EIO; | |
817 | if (len < 0) | |
818 | return len; | |
819 | return 0; | |
820 | } | |
821 | ||
53569322 | 822 | static |
4e48b5d2 | 823 | ssize_t count_one_type(const struct lttng_ust_type_common *lt) |
53569322 | 824 | { |
a084756d MD |
825 | switch (lt->type) { |
826 | case lttng_ust_type_integer: | |
827 | case lttng_ust_type_float: | |
828 | case lttng_ust_type_string: | |
53569322 | 829 | return 1; |
a084756d MD |
830 | case lttng_ust_type_enum: |
831 | return count_one_type(lttng_ust_get_type_enum(lt)->container_type) + 1; | |
832 | case lttng_ust_type_array: | |
833 | return count_one_type(lttng_ust_get_type_array(lt)->elem_type) + 1; | |
834 | case lttng_ust_type_sequence: | |
835 | return count_one_type(lttng_ust_get_type_sequence(lt)->elem_type) + 1; | |
836 | case lttng_ust_type_struct: | |
837 | return count_fields_recursive(lttng_ust_get_type_struct(lt)->nr_fields, | |
838 | lttng_ust_get_type_struct(lt)->fields) + 1; | |
839 | ||
840 | case lttng_ust_type_dynamic: | |
53569322 | 841 | { |
3d33ca1d | 842 | const struct lttng_ust_event_field * const *choices; |
53569322 MD |
843 | size_t nr_choices; |
844 | int ret; | |
845 | ||
846 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
847 | &choices); | |
848 | if (ret) | |
849 | return ret; | |
850 | /* | |
cf22367f | 851 | * Two fields for enum, one field for variant, and |
53569322 MD |
852 | * one field per choice. |
853 | */ | |
cf22367f | 854 | return count_fields_recursive(nr_choices, choices) + 3; |
53569322 | 855 | } |
218deb69 | 856 | |
53569322 MD |
857 | default: |
858 | return -EINVAL; | |
859 | } | |
860 | return 0; | |
861 | } | |
862 | ||
863 | static | |
864 | ssize_t count_fields_recursive(size_t nr_fields, | |
3d33ca1d | 865 | const struct lttng_ust_event_field * const *lttng_fields) |
53569322 MD |
866 | { |
867 | int i; | |
868 | ssize_t ret, count = 0; | |
869 | ||
870 | for (i = 0; i < nr_fields; i++) { | |
25cff019 | 871 | const struct lttng_ust_event_field *lf; |
53569322 | 872 | |
25cff019 | 873 | lf = lttng_fields[i]; |
53569322 MD |
874 | /* skip 'nowrite' fields */ |
875 | if (lf->nowrite) | |
876 | continue; | |
a084756d | 877 | ret = count_one_type(lf->type); |
53569322 MD |
878 | if (ret < 0) |
879 | return ret; /* error */ | |
880 | count += ret; | |
881 | } | |
882 | return count; | |
883 | } | |
884 | ||
885 | static | |
886 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
4e48b5d2 | 887 | struct lttng_ust_ctx_field *lttng_fields) |
53569322 MD |
888 | { |
889 | int i; | |
890 | ssize_t ret, count = 0; | |
891 | ||
892 | for (i = 0; i < nr_fields; i++) { | |
25cff019 | 893 | const struct lttng_ust_event_field *lf; |
53569322 | 894 | |
4e48b5d2 | 895 | lf = lttng_fields[i].event_field; |
53569322 MD |
896 | /* skip 'nowrite' fields */ |
897 | if (lf->nowrite) | |
898 | continue; | |
a084756d | 899 | ret = count_one_type(lf->type); |
53569322 MD |
900 | if (ret < 0) |
901 | return ret; /* error */ | |
902 | count += ret; | |
903 | } | |
904 | return count; | |
905 | } | |
906 | ||
31a85ea9 MD |
907 | static |
908 | int serialize_string_encoding(int32_t *ue, | |
a084756d | 909 | enum lttng_ust_string_encoding le) |
31a85ea9 MD |
910 | { |
911 | switch (le) { | |
a084756d | 912 | case lttng_ust_string_encoding_none: |
249cffb5 | 913 | *ue = lttng_ust_ctl_encode_none; |
31a85ea9 | 914 | break; |
a084756d | 915 | case lttng_ust_string_encoding_UTF8: |
249cffb5 | 916 | *ue = lttng_ust_ctl_encode_UTF8; |
31a85ea9 | 917 | break; |
a084756d | 918 | case lttng_ust_string_encoding_ASCII: |
249cffb5 | 919 | *ue = lttng_ust_ctl_encode_ASCII; |
31a85ea9 MD |
920 | break; |
921 | default: | |
922 | return -EINVAL; | |
923 | } | |
924 | return 0; | |
925 | } | |
926 | ||
927 | static | |
249cffb5 | 928 | int serialize_integer_type(struct lttng_ust_ctl_integer_type *uit, |
a084756d MD |
929 | const struct lttng_ust_type_integer *lit, |
930 | enum lttng_ust_string_encoding lencoding) | |
31a85ea9 MD |
931 | { |
932 | int32_t encoding; | |
933 | ||
934 | uit->size = lit->size; | |
935 | uit->signedness = lit->signedness; | |
936 | uit->reverse_byte_order = lit->reverse_byte_order; | |
937 | uit->base = lit->base; | |
a084756d | 938 | if (serialize_string_encoding(&encoding, lencoding)) |
31a85ea9 MD |
939 | return -EINVAL; |
940 | uit->encoding = encoding; | |
941 | uit->alignment = lit->alignment; | |
942 | return 0; | |
943 | } | |
944 | ||
32ce8569 | 945 | static |
f69fe5fb | 946 | int serialize_dynamic_type(struct lttng_ust_session *session, |
249cffb5 | 947 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
218deb69 | 948 | const char *field_name) |
32ce8569 | 949 | { |
3d33ca1d | 950 | const struct lttng_ust_event_field * const *choices; |
fd17d7ce | 951 | char tag_field_name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
4e48b5d2 MD |
952 | const struct lttng_ust_type_common *tag_type; |
953 | const struct lttng_ust_event_field *tag_field_generic; | |
25cff019 | 954 | struct lttng_ust_event_field tag_field = { |
53569322 MD |
955 | .name = tag_field_name, |
956 | .nowrite = 0, | |
957 | }; | |
249cffb5 | 958 | struct lttng_ust_ctl_field *uf; |
53569322 | 959 | size_t nr_choices, i; |
32ce8569 MD |
960 | int ret; |
961 | ||
53569322 | 962 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
a084756d | 963 | tag_type = tag_field_generic->type; |
53569322 MD |
964 | |
965 | /* Serialize enum field. */ | |
fd17d7ce MD |
966 | strncpy(tag_field_name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
967 | tag_field_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
53569322 MD |
968 | strncat(tag_field_name, |
969 | "_tag", | |
fd17d7ce | 970 | LTTNG_UST_ABI_SYM_NAME_LEN - strlen(tag_field_name) - 1); |
a084756d | 971 | tag_field.type = tag_type; |
53569322 | 972 | ret = serialize_one_field(session, fields, iter_output, |
28db0827 | 973 | &tag_field, NULL); |
53569322 MD |
974 | if (ret) |
975 | return ret; | |
976 | ||
977 | /* Serialize variant field. */ | |
978 | uf = &fields[*iter_output]; | |
979 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
980 | if (ret) | |
981 | return ret; | |
982 | ||
fd17d7ce MD |
983 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
984 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
61c70d37 | 985 | uf->type.atype = lttng_ust_ctl_atype_variant_nestable; |
218deb69 MD |
986 | uf->type.u.variant_nestable.nr_choices = nr_choices; |
987 | strncpy(uf->type.u.variant_nestable.tag_name, | |
53569322 | 988 | tag_field_name, |
fd17d7ce MD |
989 | LTTNG_UST_ABI_SYM_NAME_LEN); |
990 | uf->type.u.variant_nestable.tag_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 | 991 | uf->type.u.variant_nestable.alignment = 0; |
53569322 MD |
992 | (*iter_output)++; |
993 | ||
994 | /* Serialize choice fields after variant. */ | |
995 | for (i = 0; i < nr_choices; i++) { | |
996 | ret = serialize_one_field(session, fields, | |
28db0827 | 997 | iter_output, choices[i], NULL); |
53569322 MD |
998 | if (ret) |
999 | return ret; | |
1000 | } | |
1001 | return 0; | |
1002 | } | |
1003 | ||
1004 | static | |
f69fe5fb | 1005 | int serialize_one_type(struct lttng_ust_session *session, |
249cffb5 | 1006 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
4e48b5d2 | 1007 | const char *field_name, const struct lttng_ust_type_common *lt, |
28db0827 MD |
1008 | enum lttng_ust_string_encoding parent_encoding, |
1009 | const char *prev_field_name) | |
53569322 | 1010 | { |
53569322 MD |
1011 | int ret; |
1012 | ||
218deb69 | 1013 | /* |
249cffb5 | 1014 | * Serializing a type (rather than a field) generates a lttng_ust_ctl_field |
218deb69 MD |
1015 | * entry with 0-length name. |
1016 | */ | |
53569322 | 1017 | |
a084756d MD |
1018 | switch (lt->type) { |
1019 | case lttng_ust_type_integer: | |
31a85ea9 | 1020 | { |
249cffb5 MJ |
1021 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1022 | struct lttng_ust_ctl_type *ut = &uf->type; | |
31a85ea9 MD |
1023 | |
1024 | if (field_name) { | |
fd17d7ce MD |
1025 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1026 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1027 | } else { |
1028 | uf->name[0] = '\0'; | |
1029 | } | |
a084756d MD |
1030 | ret = serialize_integer_type(&ut->u.integer, lttng_ust_get_type_integer(lt), |
1031 | parent_encoding); | |
31a85ea9 MD |
1032 | if (ret) |
1033 | return ret; | |
249cffb5 | 1034 | ut->atype = lttng_ust_ctl_atype_integer; |
31a85ea9 MD |
1035 | (*iter_output)++; |
1036 | break; | |
1037 | } | |
a084756d | 1038 | case lttng_ust_type_float: |
31a85ea9 | 1039 | { |
249cffb5 MJ |
1040 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1041 | struct lttng_ust_ctl_type *ut = &uf->type; | |
1042 | struct lttng_ust_ctl_float_type *uft; | |
4e48b5d2 | 1043 | const struct lttng_ust_type_float *lft; |
31a85ea9 MD |
1044 | |
1045 | if (field_name) { | |
fd17d7ce MD |
1046 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1047 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1048 | } else { |
1049 | uf->name[0] = '\0'; | |
1050 | } | |
1051 | uft = &ut->u._float; | |
a084756d | 1052 | lft = lttng_ust_get_type_float(lt); |
31a85ea9 MD |
1053 | uft->exp_dig = lft->exp_dig; |
1054 | uft->mant_dig = lft->mant_dig; | |
1055 | uft->alignment = lft->alignment; | |
1056 | uft->reverse_byte_order = lft->reverse_byte_order; | |
249cffb5 | 1057 | ut->atype = lttng_ust_ctl_atype_float; |
31a85ea9 MD |
1058 | (*iter_output)++; |
1059 | break; | |
1060 | } | |
a084756d | 1061 | case lttng_ust_type_string: |
31a85ea9 | 1062 | { |
249cffb5 MJ |
1063 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1064 | struct lttng_ust_ctl_type *ut = &uf->type; | |
31a85ea9 MD |
1065 | int32_t encoding; |
1066 | ||
1067 | if (field_name) { | |
fd17d7ce MD |
1068 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1069 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1070 | } else { |
1071 | uf->name[0] = '\0'; | |
1072 | } | |
a084756d | 1073 | ret = serialize_string_encoding(&encoding, lttng_ust_get_type_string(lt)->encoding); |
31a85ea9 MD |
1074 | if (ret) |
1075 | return ret; | |
1076 | ut->u.string.encoding = encoding; | |
249cffb5 | 1077 | ut->atype = lttng_ust_ctl_atype_string; |
31a85ea9 MD |
1078 | (*iter_output)++; |
1079 | break; | |
1080 | } | |
a084756d | 1081 | case lttng_ust_type_array: |
218deb69 | 1082 | { |
249cffb5 MJ |
1083 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1084 | struct lttng_ust_ctl_type *ut = &uf->type; | |
218deb69 MD |
1085 | |
1086 | if (field_name) { | |
fd17d7ce MD |
1087 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1088 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1089 | } else { |
1090 | uf->name[0] = '\0'; | |
1091 | } | |
249cffb5 | 1092 | ut->atype = lttng_ust_ctl_atype_array_nestable; |
a084756d MD |
1093 | ut->u.array_nestable.length = lttng_ust_get_type_array(lt)->length; |
1094 | ut->u.array_nestable.alignment = lttng_ust_get_type_array(lt)->alignment; | |
218deb69 MD |
1095 | (*iter_output)++; |
1096 | ||
1097 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d | 1098 | lttng_ust_get_type_array(lt)->elem_type, |
28db0827 | 1099 | lttng_ust_get_type_array(lt)->encoding, NULL); |
218deb69 MD |
1100 | if (ret) |
1101 | return -EINVAL; | |
1102 | break; | |
1103 | } | |
a084756d | 1104 | case lttng_ust_type_sequence: |
218deb69 | 1105 | { |
249cffb5 MJ |
1106 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1107 | struct lttng_ust_ctl_type *ut = &uf->type; | |
28db0827 | 1108 | const char *length_name = lttng_ust_get_type_sequence(lt)->length_name; |
218deb69 MD |
1109 | |
1110 | if (field_name) { | |
fd17d7ce MD |
1111 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1112 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1113 | } else { |
1114 | uf->name[0] = '\0'; | |
1115 | } | |
249cffb5 | 1116 | ut->atype = lttng_ust_ctl_atype_sequence_nestable; |
28db0827 MD |
1117 | /* |
1118 | * If length_name field is NULL, use the previous field | |
1119 | * as length. | |
1120 | */ | |
1121 | if (!length_name) | |
1122 | length_name = prev_field_name; | |
1123 | if (!length_name) | |
1124 | return -EINVAL; | |
218deb69 | 1125 | strncpy(ut->u.sequence_nestable.length_name, |
28db0827 | 1126 | length_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
fd17d7ce | 1127 | ut->u.sequence_nestable.length_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; |
a084756d | 1128 | ut->u.sequence_nestable.alignment = lttng_ust_get_type_sequence(lt)->alignment; |
218deb69 MD |
1129 | (*iter_output)++; |
1130 | ||
1131 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d | 1132 | lttng_ust_get_type_sequence(lt)->elem_type, |
28db0827 | 1133 | lttng_ust_get_type_sequence(lt)->encoding, NULL); |
218deb69 MD |
1134 | if (ret) |
1135 | return -EINVAL; | |
1136 | break; | |
1137 | } | |
a084756d | 1138 | case lttng_ust_type_dynamic: |
53569322 | 1139 | { |
218deb69 MD |
1140 | ret = serialize_dynamic_type(session, fields, iter_output, |
1141 | field_name); | |
53569322 MD |
1142 | if (ret) |
1143 | return -EINVAL; | |
1144 | break; | |
1145 | } | |
a084756d | 1146 | case lttng_ust_type_struct: |
218deb69 | 1147 | { |
249cffb5 | 1148 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
218deb69 MD |
1149 | |
1150 | if (field_name) { | |
fd17d7ce MD |
1151 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1152 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1153 | } else { |
1154 | uf->name[0] = '\0'; | |
1155 | } | |
249cffb5 | 1156 | uf->type.atype = lttng_ust_ctl_atype_struct_nestable; |
a084756d MD |
1157 | uf->type.u.struct_nestable.nr_fields = lttng_ust_get_type_struct(lt)->nr_fields; |
1158 | uf->type.u.struct_nestable.alignment = lttng_ust_get_type_struct(lt)->alignment; | |
218deb69 MD |
1159 | (*iter_output)++; |
1160 | ||
1161 | ret = serialize_fields(session, fields, iter_output, | |
a084756d MD |
1162 | lttng_ust_get_type_struct(lt)->nr_fields, |
1163 | lttng_ust_get_type_struct(lt)->fields); | |
218deb69 MD |
1164 | if (ret) |
1165 | return -EINVAL; | |
1166 | break; | |
1167 | } | |
a084756d | 1168 | case lttng_ust_type_enum: |
218deb69 | 1169 | { |
249cffb5 MJ |
1170 | struct lttng_ust_ctl_field *uf = &fields[*iter_output]; |
1171 | struct lttng_ust_ctl_type *ut = &uf->type; | |
218deb69 MD |
1172 | |
1173 | if (field_name) { | |
fd17d7ce MD |
1174 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1175 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1176 | } else { |
1177 | uf->name[0] = '\0'; | |
1178 | } | |
a084756d | 1179 | strncpy(ut->u.enum_nestable.name, lttng_ust_get_type_enum(lt)->desc->name, |
fd17d7ce MD |
1180 | LTTNG_UST_ABI_SYM_NAME_LEN); |
1181 | ut->u.enum_nestable.name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
249cffb5 | 1182 | ut->atype = lttng_ust_ctl_atype_enum_nestable; |
218deb69 MD |
1183 | (*iter_output)++; |
1184 | ||
1185 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d | 1186 | lttng_ust_get_type_enum(lt)->container_type, |
28db0827 | 1187 | lttng_ust_string_encoding_none, NULL); |
218deb69 MD |
1188 | if (ret) |
1189 | return -EINVAL; | |
1190 | if (session) { | |
1191 | const struct lttng_enum *_enum; | |
1192 | ||
a084756d | 1193 | _enum = lttng_ust_enum_get_from_desc(session, lttng_ust_get_type_enum(lt)->desc); |
218deb69 MD |
1194 | if (!_enum) |
1195 | return -EINVAL; | |
1196 | ut->u.enum_nestable.id = _enum->id; | |
1197 | } else { | |
1198 | ut->u.enum_nestable.id = -1ULL; | |
1199 | } | |
32ce8569 MD |
1200 | break; |
1201 | } | |
32ce8569 MD |
1202 | default: |
1203 | return -EINVAL; | |
1204 | } | |
1205 | return 0; | |
1206 | } | |
1207 | ||
218deb69 | 1208 | static |
f69fe5fb | 1209 | int serialize_one_field(struct lttng_ust_session *session, |
249cffb5 | 1210 | struct lttng_ust_ctl_field *fields, size_t *iter_output, |
28db0827 MD |
1211 | const struct lttng_ust_event_field *lf, |
1212 | const char **prev_field_name_p) | |
218deb69 | 1213 | { |
28db0827 MD |
1214 | const char *prev_field_name = NULL; |
1215 | int ret; | |
1216 | ||
218deb69 MD |
1217 | /* skip 'nowrite' fields */ |
1218 | if (lf->nowrite) | |
1219 | return 0; | |
1220 | ||
28db0827 MD |
1221 | if (prev_field_name_p) |
1222 | prev_field_name = *prev_field_name_p; | |
1223 | ret = serialize_one_type(session, fields, iter_output, lf->name, lf->type, | |
1224 | lttng_ust_string_encoding_none, prev_field_name); | |
1225 | if (prev_field_name_p) | |
1226 | *prev_field_name_p = lf->name; | |
1227 | return ret; | |
218deb69 MD |
1228 | } |
1229 | ||
32ce8569 | 1230 | static |
f69fe5fb | 1231 | int serialize_fields(struct lttng_ust_session *session, |
249cffb5 | 1232 | struct lttng_ust_ctl_field *lttng_ust_ctl_fields, |
218deb69 | 1233 | size_t *iter_output, size_t nr_lttng_fields, |
3d33ca1d | 1234 | const struct lttng_ust_event_field * const *lttng_fields) |
218deb69 | 1235 | { |
28db0827 | 1236 | const char *prev_field_name = NULL; |
218deb69 MD |
1237 | int ret; |
1238 | size_t i; | |
1239 | ||
1240 | for (i = 0; i < nr_lttng_fields; i++) { | |
249cffb5 | 1241 | ret = serialize_one_field(session, lttng_ust_ctl_fields, |
28db0827 MD |
1242 | iter_output, lttng_fields[i], |
1243 | &prev_field_name); | |
218deb69 MD |
1244 | if (ret) |
1245 | return ret; | |
1246 | } | |
1247 | return 0; | |
1248 | } | |
1249 | ||
1250 | static | |
f69fe5fb | 1251 | int alloc_serialize_fields(struct lttng_ust_session *session, |
c785c634 | 1252 | size_t *_nr_write_fields, |
249cffb5 | 1253 | struct lttng_ust_ctl_field **lttng_ust_ctl_fields, |
32ce8569 | 1254 | size_t nr_fields, |
3d33ca1d | 1255 | const struct lttng_ust_event_field * const *lttng_fields) |
32ce8569 | 1256 | { |
249cffb5 | 1257 | struct lttng_ust_ctl_field *fields; |
53569322 | 1258 | int ret; |
218deb69 | 1259 | size_t iter_output = 0; |
53569322 MD |
1260 | ssize_t nr_write_fields; |
1261 | ||
1262 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1263 | if (nr_write_fields < 0) { | |
1264 | return (int) nr_write_fields; | |
1265 | } | |
32ce8569 | 1266 | |
53569322 | 1267 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1268 | if (!fields) |
1269 | return -ENOMEM; | |
1270 | ||
218deb69 MD |
1271 | ret = serialize_fields(session, fields, &iter_output, nr_fields, |
1272 | lttng_fields); | |
1273 | if (ret) | |
1274 | goto error_type; | |
32ce8569 MD |
1275 | |
1276 | *_nr_write_fields = nr_write_fields; | |
249cffb5 | 1277 | *lttng_ust_ctl_fields = fields; |
32ce8569 MD |
1278 | return 0; |
1279 | ||
1280 | error_type: | |
1281 | free(fields); | |
1282 | return ret; | |
1283 | } | |
1284 | ||
c785c634 | 1285 | static |
249cffb5 | 1286 | int serialize_entries(struct lttng_ust_ctl_enum_entry **_entries, |
c785c634 | 1287 | size_t nr_entries, |
3d33ca1d | 1288 | const struct lttng_ust_enum_entry * const *lttng_entries) |
c785c634 | 1289 | { |
249cffb5 | 1290 | struct lttng_ust_ctl_enum_entry *entries; |
c785c634 MD |
1291 | int i; |
1292 | ||
1293 | /* Serialize the entries */ | |
1294 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1295 | if (!entries) | |
1296 | return -ENOMEM; | |
1297 | for (i = 0; i < nr_entries; i++) { | |
249cffb5 | 1298 | struct lttng_ust_ctl_enum_entry *uentry; |
891d6b55 | 1299 | const struct lttng_ust_enum_entry *lentry; |
c785c634 MD |
1300 | |
1301 | uentry = &entries[i]; | |
891d6b55 | 1302 | lentry = lttng_entries[i]; |
c785c634 | 1303 | |
a6f80644 MD |
1304 | uentry->start.value = lentry->start.value; |
1305 | uentry->start.signedness = lentry->start.signedness; | |
1306 | uentry->end.value = lentry->end.value; | |
1307 | uentry->end.signedness = lentry->end.signedness; | |
fd17d7ce MD |
1308 | strncpy(uentry->string, lentry->string, LTTNG_UST_ABI_SYM_NAME_LEN); |
1309 | uentry->string[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 | 1310 | |
1a37a873 | 1311 | if (lentry->options & LTTNG_UST_ENUM_ENTRY_OPTION_IS_AUTO) { |
3e762260 | 1312 | uentry->u.extra.options |= |
249cffb5 | 1313 | LTTNG_UST_CTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; |
3e762260 | 1314 | } |
c785c634 MD |
1315 | } |
1316 | *_entries = entries; | |
1317 | return 0; | |
1318 | } | |
1319 | ||
83e43212 | 1320 | static |
f69fe5fb | 1321 | int serialize_ctx_fields(struct lttng_ust_session *session, |
53569322 | 1322 | size_t *_nr_write_fields, |
249cffb5 | 1323 | struct lttng_ust_ctl_field **lttng_ust_ctl_fields, |
83e43212 | 1324 | size_t nr_fields, |
4e48b5d2 | 1325 | struct lttng_ust_ctx_field *lttng_fields) |
83e43212 | 1326 | { |
249cffb5 | 1327 | struct lttng_ust_ctl_field *fields; |
28db0827 | 1328 | const char *prev_field_name = NULL; |
53569322 MD |
1329 | size_t i, iter_output = 0; |
1330 | ssize_t nr_write_fields; | |
28db0827 | 1331 | int ret; |
83e43212 | 1332 | |
53569322 MD |
1333 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1334 | lttng_fields); | |
1335 | if (nr_write_fields < 0) { | |
1336 | return (int) nr_write_fields; | |
1337 | } | |
1338 | ||
1339 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1340 | if (!fields) |
1341 | return -ENOMEM; | |
1342 | ||
1343 | for (i = 0; i < nr_fields; i++) { | |
53569322 | 1344 | ret = serialize_one_field(session, fields, &iter_output, |
28db0827 | 1345 | lttng_fields[i].event_field, &prev_field_name); |
83e43212 MD |
1346 | if (ret) |
1347 | goto error_type; | |
83e43212 MD |
1348 | } |
1349 | ||
1350 | *_nr_write_fields = nr_write_fields; | |
249cffb5 | 1351 | *lttng_ust_ctl_fields = fields; |
83e43212 MD |
1352 | return 0; |
1353 | ||
1354 | error_type: | |
1355 | free(fields); | |
1356 | return ret; | |
1357 | } | |
1358 | ||
32ce8569 MD |
1359 | /* |
1360 | * Returns 0 on success, negative error value on error. | |
1361 | */ | |
1362 | int ustcomm_register_event(int sock, | |
f69fe5fb | 1363 | struct lttng_ust_session *session, |
32ce8569 MD |
1364 | int session_objd, /* session descriptor */ |
1365 | int channel_objd, /* channel descriptor */ | |
1366 | const char *event_name, /* event name (input) */ | |
1367 | int loglevel, | |
1368 | const char *signature, /* event signature (input) */ | |
1369 | size_t nr_fields, /* fields */ | |
3d33ca1d | 1370 | const struct lttng_ust_event_field * const *lttng_fields, |
32ce8569 | 1371 | const char *model_emf_uri, |
b187bcd5 | 1372 | uint64_t user_token, |
24f7193c | 1373 | uint32_t *id) /* event id (output) */ |
32ce8569 MD |
1374 | { |
1375 | ssize_t len; | |
1376 | struct { | |
1377 | struct ustcomm_notify_hdr header; | |
1378 | struct ustcomm_notify_event_msg m; | |
1379 | } msg; | |
1380 | struct { | |
1381 | struct ustcomm_notify_hdr header; | |
1382 | struct ustcomm_notify_event_reply r; | |
1383 | } reply; | |
1384 | size_t signature_len, fields_len, model_emf_uri_len; | |
249cffb5 | 1385 | struct lttng_ust_ctl_field *fields = NULL; |
32ce8569 MD |
1386 | size_t nr_write_fields = 0; |
1387 | int ret; | |
1388 | ||
1389 | memset(&msg, 0, sizeof(msg)); | |
249cffb5 | 1390 | msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_EVENT; |
32ce8569 MD |
1391 | msg.m.session_objd = session_objd; |
1392 | msg.m.channel_objd = channel_objd; | |
fd17d7ce MD |
1393 | strncpy(msg.m.event_name, event_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1394 | msg.m.event_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
32ce8569 | 1395 | msg.m.loglevel = loglevel; |
b187bcd5 | 1396 | msg.m.user_token = user_token; |
32ce8569 MD |
1397 | signature_len = strlen(signature) + 1; |
1398 | msg.m.signature_len = signature_len; | |
1399 | ||
1400 | /* Calculate fields len, serialize fields. */ | |
1401 | if (nr_fields > 0) { | |
218deb69 | 1402 | ret = alloc_serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1403 | nr_fields, lttng_fields); |
1404 | if (ret) | |
1405 | return ret; | |
1406 | } | |
1407 | ||
1408 | fields_len = sizeof(*fields) * nr_write_fields; | |
1409 | msg.m.fields_len = fields_len; | |
1410 | if (model_emf_uri) { | |
1411 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1412 | } else { | |
1413 | model_emf_uri_len = 0; | |
1414 | } | |
1415 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1416 | |
32ce8569 MD |
1417 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1418 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1419 | ret = -EIO; |
1420 | goto error_fields; | |
32ce8569 MD |
1421 | } |
1422 | if (len < 0) { | |
c785c634 MD |
1423 | ret = len; |
1424 | goto error_fields; | |
32ce8569 MD |
1425 | } |
1426 | ||
1427 | /* send signature */ | |
1428 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1429 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1430 | ret = -EIO; |
1431 | goto error_fields; | |
32ce8569 MD |
1432 | } |
1433 | if (len < 0) { | |
6b95617c MD |
1434 | ret = len; |
1435 | goto error_fields; | |
32ce8569 MD |
1436 | } |
1437 | ||
1438 | /* send fields */ | |
1439 | if (fields_len > 0) { | |
1440 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1441 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1442 | ret = -EIO; |
1443 | goto error_fields; | |
32ce8569 MD |
1444 | } |
1445 | if (len < 0) { | |
c785c634 MD |
1446 | ret = len; |
1447 | goto error_fields; | |
32ce8569 MD |
1448 | } |
1449 | } | |
6b95617c | 1450 | free(fields); |
32ce8569 MD |
1451 | |
1452 | if (model_emf_uri_len) { | |
1453 | /* send model_emf_uri */ | |
1454 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1455 | model_emf_uri_len); | |
c785c634 | 1456 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1457 | return -EIO; |
c785c634 MD |
1458 | } |
1459 | if (len < 0) { | |
6b95617c | 1460 | return len; |
c785c634 | 1461 | } |
32ce8569 MD |
1462 | } |
1463 | ||
1464 | /* receive reply */ | |
1465 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1466 | switch (len) { | |
1467 | case 0: /* orderly shutdown */ | |
1468 | return -EPIPE; | |
1469 | case sizeof(reply): | |
1470 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1471 | ERR("Unexpected result message command " | |
1472 | "expected: %u vs received: %u\n", | |
1473 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1474 | return -EINVAL; | |
1475 | } | |
1476 | if (reply.r.ret_code > 0) | |
1477 | return -EINVAL; | |
1478 | if (reply.r.ret_code < 0) | |
1479 | return reply.r.ret_code; | |
1e9d0add | 1480 | *id = reply.r.id; |
24f7193c | 1481 | DBG("Sent register event notification for name \"%s\": ret_code %d, id %" PRIu32 "\n", |
1e9d0add | 1482 | event_name, reply.r.ret_code, reply.r.id); |
32ce8569 MD |
1483 | return 0; |
1484 | default: | |
1485 | if (len < 0) { | |
1486 | /* Transport level error */ | |
1487 | if (errno == EPIPE || errno == ECONNRESET) | |
1488 | len = -errno; | |
1489 | return len; | |
1490 | } else { | |
1491 | ERR("incorrect message size: %zd\n", len); | |
1492 | return len; | |
1493 | } | |
1494 | } | |
6b95617c | 1495 | /* Unreached. */ |
c785c634 | 1496 | |
6b95617c | 1497 | /* Error path only. */ |
c785c634 MD |
1498 | error_fields: |
1499 | free(fields); | |
1500 | return ret; | |
1501 | } | |
1502 | ||
24f7193c MD |
1503 | /* |
1504 | * Returns 0 on success, negative error value on error. | |
1505 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1506 | */ | |
1507 | int ustcomm_register_key(int sock, | |
1508 | int session_objd, /* session descriptor */ | |
1509 | int map_objd, /* map descriptor */ | |
1510 | uint32_t dimension, | |
1511 | const uint64_t *dimension_indexes, | |
1512 | const char *key_string, /* key string (input) */ | |
1513 | uint64_t user_token, | |
1514 | uint64_t *index) /* (output) */ | |
1515 | { | |
1516 | ssize_t len; | |
1517 | struct { | |
1518 | struct ustcomm_notify_hdr header; | |
1519 | struct ustcomm_notify_key_msg m; | |
1520 | } msg; | |
1521 | struct { | |
1522 | struct ustcomm_notify_hdr header; | |
1523 | struct ustcomm_notify_key_reply r; | |
1524 | } reply; | |
1525 | size_t dimension_indexes_len; | |
1526 | int ret; | |
1527 | ||
1528 | memset(&msg, 0, sizeof(msg)); | |
1529 | msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_KEY; | |
1530 | msg.m.session_objd = session_objd; | |
1531 | msg.m.map_objd = map_objd; | |
1532 | msg.m.dimension = dimension; | |
1533 | dimension_indexes_len = sizeof(uint64_t) * dimension; | |
1534 | msg.m.key_string_len = strlen(key_string) + 1; | |
1535 | msg.m.user_token = user_token; | |
1536 | ||
1537 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1538 | if (len > 0 && len != sizeof(msg)) { | |
1539 | ret = -EIO; | |
1540 | goto error_send; | |
1541 | } | |
1542 | if (len < 0) { | |
1543 | ret = len; | |
1544 | goto error_send; | |
1545 | } | |
1546 | ||
1547 | /* send dimension_indexes */ | |
1548 | if (dimension_indexes) { | |
1549 | len = ustcomm_send_unix_sock(sock, dimension_indexes, dimension_indexes_len); | |
1550 | if (len > 0 && len != dimension_indexes_len) { | |
1551 | ret = -EIO; | |
1552 | goto error_dimension_indexes; | |
1553 | } | |
1554 | if (len < 0) { | |
1555 | ret = len; | |
1556 | goto error_dimension_indexes; | |
1557 | } | |
1558 | } | |
1559 | ||
1560 | /* send key_string */ | |
1561 | len = ustcomm_send_unix_sock(sock, key_string, msg.m.key_string_len); | |
1562 | if (len > 0 && len != dimension_indexes_len) { | |
1563 | ret = -EIO; | |
1564 | goto error_dimension_indexes; | |
1565 | } | |
1566 | if (len < 0) { | |
1567 | ret = len; | |
1568 | goto error_dimension_indexes; | |
1569 | } | |
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 | *index = reply.r.index; | |
1588 | DBG("Sent register key notification for key \"%s\": ret_code %d, index %" PRIu64 "\n", | |
1589 | key_string, reply.r.ret_code, reply.r.index); | |
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 | /* Unreached. */ | |
1603 | ||
1604 | /* Error path only. */ | |
1605 | error_dimension_indexes: | |
1606 | error_send: | |
1607 | return ret; | |
1608 | } | |
1609 | ||
c785c634 MD |
1610 | /* |
1611 | * Returns 0 on success, negative error value on error. | |
1612 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1613 | */ | |
1614 | int ustcomm_register_enum(int sock, | |
1615 | int session_objd, /* session descriptor */ | |
1616 | const char *enum_name, /* enum name (input) */ | |
1617 | size_t nr_entries, /* entries */ | |
3d33ca1d | 1618 | const struct lttng_ust_enum_entry * const *lttng_entries, |
c785c634 MD |
1619 | uint64_t *id) |
1620 | { | |
1621 | ssize_t len; | |
1622 | struct { | |
1623 | struct ustcomm_notify_hdr header; | |
1624 | struct ustcomm_notify_enum_msg m; | |
1625 | } msg; | |
1626 | struct { | |
1627 | struct ustcomm_notify_hdr header; | |
1628 | struct ustcomm_notify_enum_reply r; | |
1629 | } reply; | |
1630 | size_t entries_len; | |
249cffb5 | 1631 | struct lttng_ust_ctl_enum_entry *entries = NULL; |
c785c634 MD |
1632 | int ret; |
1633 | ||
1634 | memset(&msg, 0, sizeof(msg)); | |
249cffb5 | 1635 | msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_ENUM; |
c785c634 | 1636 | msg.m.session_objd = session_objd; |
fd17d7ce MD |
1637 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1638 | msg.m.enum_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
c785c634 MD |
1639 | |
1640 | /* Calculate entries len, serialize entries. */ | |
1641 | if (nr_entries > 0) { | |
1642 | ret = serialize_entries(&entries, | |
1643 | nr_entries, lttng_entries); | |
1644 | if (ret) | |
1645 | return ret; | |
1646 | } | |
1647 | ||
1648 | entries_len = sizeof(*entries) * nr_entries; | |
1649 | msg.m.entries_len = entries_len; | |
1650 | ||
1651 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1652 | if (len > 0 && len != sizeof(msg)) { | |
1653 | ret = -EIO; | |
1654 | goto error_entries; | |
1655 | } | |
1656 | if (len < 0) { | |
1657 | ret = len; | |
1658 | goto error_entries; | |
1659 | } | |
1660 | ||
1661 | /* send entries */ | |
1662 | if (entries_len > 0) { | |
1663 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1664 | if (len > 0 && len != entries_len) { | |
1665 | ret = -EIO; | |
1666 | goto error_entries; | |
1667 | } | |
1668 | if (len < 0) { | |
1669 | ret = len; | |
1670 | goto error_entries; | |
1671 | } | |
1672 | } | |
1673 | free(entries); | |
1674 | entries = NULL; | |
1675 | ||
1676 | /* receive reply */ | |
1677 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1678 | switch (len) { | |
1679 | case 0: /* orderly shutdown */ | |
1680 | return -EPIPE; | |
1681 | case sizeof(reply): | |
1682 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1683 | ERR("Unexpected result message command " | |
1684 | "expected: %u vs received: %u\n", | |
1685 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1686 | return -EINVAL; | |
1687 | } | |
1688 | if (reply.r.ret_code > 0) | |
1689 | return -EINVAL; | |
1690 | if (reply.r.ret_code < 0) | |
1691 | return reply.r.ret_code; | |
1692 | *id = reply.r.enum_id; | |
1693 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1694 | enum_name, reply.r.ret_code); | |
1695 | return 0; | |
1696 | default: | |
1697 | if (len < 0) { | |
1698 | /* Transport level error */ | |
1699 | if (errno == EPIPE || errno == ECONNRESET) | |
1700 | len = -errno; | |
1701 | return len; | |
1702 | } else { | |
1703 | ERR("incorrect message size: %zd\n", len); | |
1704 | return len; | |
1705 | } | |
1706 | } | |
1707 | return ret; | |
1708 | ||
1709 | error_entries: | |
1710 | free(entries); | |
1711 | return ret; | |
32ce8569 MD |
1712 | } |
1713 | ||
1714 | /* | |
1715 | * Returns 0 on success, negative error value on error. | |
1716 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1717 | */ | |
1718 | int ustcomm_register_channel(int sock, | |
f69fe5fb | 1719 | struct lttng_ust_session *session, |
32ce8569 MD |
1720 | int session_objd, /* session descriptor */ |
1721 | int channel_objd, /* channel descriptor */ | |
1722 | size_t nr_ctx_fields, | |
4e48b5d2 | 1723 | struct lttng_ust_ctx_field *ctx_fields, |
32ce8569 MD |
1724 | uint32_t *chan_id, /* channel id (output) */ |
1725 | int *header_type) /* header type (output) */ | |
1726 | { | |
1727 | ssize_t len; | |
1728 | struct { | |
1729 | struct ustcomm_notify_hdr header; | |
1730 | struct ustcomm_notify_channel_msg m; | |
1731 | } msg; | |
1732 | struct { | |
1733 | struct ustcomm_notify_hdr header; | |
1734 | struct ustcomm_notify_channel_reply r; | |
1735 | } reply; | |
1736 | size_t fields_len; | |
249cffb5 | 1737 | struct lttng_ust_ctl_field *fields = NULL; |
32ce8569 MD |
1738 | int ret; |
1739 | size_t nr_write_fields = 0; | |
1740 | ||
1741 | memset(&msg, 0, sizeof(msg)); | |
249cffb5 | 1742 | msg.header.notify_cmd = LTTNG_UST_CTL_NOTIFY_CMD_CHANNEL; |
32ce8569 MD |
1743 | msg.m.session_objd = session_objd; |
1744 | msg.m.channel_objd = channel_objd; | |
1745 | ||
1746 | /* Calculate fields len, serialize fields. */ | |
1747 | if (nr_ctx_fields > 0) { | |
53569322 | 1748 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1749 | nr_ctx_fields, ctx_fields); |
1750 | if (ret) | |
1751 | return ret; | |
1752 | } | |
1753 | ||
1754 | fields_len = sizeof(*fields) * nr_write_fields; | |
1755 | msg.m.ctx_fields_len = fields_len; | |
1756 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1757 | if (len > 0 && len != sizeof(msg)) { | |
1758 | free(fields); | |
1759 | return -EIO; | |
1760 | } | |
1761 | if (len < 0) { | |
1762 | free(fields); | |
1763 | return len; | |
1764 | } | |
1765 | ||
1766 | /* send fields */ | |
1767 | if (fields_len > 0) { | |
1768 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1769 | free(fields); | |
1770 | if (len > 0 && len != fields_len) { | |
1771 | return -EIO; | |
1772 | } | |
1773 | if (len < 0) { | |
1774 | return len; | |
1775 | } | |
17ea789c MD |
1776 | } else { |
1777 | free(fields); | |
32ce8569 MD |
1778 | } |
1779 | ||
1780 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1781 | switch (len) { | |
1782 | case 0: /* orderly shutdown */ | |
1783 | return -EPIPE; | |
1784 | case sizeof(reply): | |
1785 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1786 | ERR("Unexpected result message command " | |
1787 | "expected: %u vs received: %u\n", | |
1788 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1789 | return -EINVAL; | |
1790 | } | |
1791 | if (reply.r.ret_code > 0) | |
1792 | return -EINVAL; | |
1793 | if (reply.r.ret_code < 0) | |
1794 | return reply.r.ret_code; | |
1795 | *chan_id = reply.r.chan_id; | |
1796 | switch (reply.r.header_type) { | |
1797 | case 1: | |
1798 | case 2: | |
1799 | *header_type = reply.r.header_type; | |
1800 | break; | |
1801 | default: | |
1802 | ERR("Unexpected channel header type %u\n", | |
1803 | reply.r.header_type); | |
1804 | return -EINVAL; | |
1805 | } | |
1806 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1807 | reply.r.chan_id, reply.r.header_type); | |
1808 | return 0; | |
1809 | default: | |
1810 | if (len < 0) { | |
1811 | /* Transport level error */ | |
1812 | if (errno == EPIPE || errno == ECONNRESET) | |
1813 | len = -errno; | |
1814 | return len; | |
1815 | } else { | |
1816 | ERR("incorrect message size: %zd\n", len); | |
1817 | return len; | |
1818 | } | |
1819 | } | |
1820 | } | |
ff517991 MD |
1821 | |
1822 | /* | |
2fbda51c | 1823 | * Set socket receiving timeout. |
ff517991 MD |
1824 | */ |
1825 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1826 | { | |
1827 | int ret; | |
1828 | struct timeval tv; | |
1829 | ||
1830 | tv.tv_sec = msec / 1000; | |
1831 | tv.tv_usec = (msec * 1000 % 1000000); | |
1832 | ||
1833 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1834 | if (ret < 0) { | |
1835 | PERROR("setsockopt SO_RCVTIMEO"); | |
1836 | ret = -errno; | |
1837 | } | |
1838 | ||
1839 | return ret; | |
1840 | } | |
1841 | ||
1842 | /* | |
1843 | * Set socket sending timeout. | |
1844 | */ | |
1845 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1846 | { | |
1847 | int ret; | |
1848 | struct timeval tv; | |
1849 | ||
1850 | tv.tv_sec = msec / 1000; | |
1851 | tv.tv_usec = (msec * 1000) % 1000000; | |
1852 | ||
1853 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1854 | if (ret < 0) { | |
1855 | PERROR("setsockopt SO_SNDTIMEO"); | |
1856 | ret = -errno; | |
1857 | } | |
1858 | ||
1859 | return ret; | |
1860 | } |