Commit | Line | Data |
---|---|---|
67c5b804 MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
74d81a6c | 3 | * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
67c5b804 | 4 | * |
15f672f9 MD |
5 | * This library is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU Lesser General Public | |
7 | * License as published by the Free Software Foundation; only | |
8 | * version 2.1 of the License. | |
9 | * | |
10 | * This library is distributed in the hope that it will be useful, | |
67c5b804 | 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
15f672f9 MD |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | * Lesser General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU Lesser General Public | |
16 | * License along with this library; if not, write to the Free Software | |
17 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
67c5b804 MD |
18 | */ |
19 | ||
20 | #define _GNU_SOURCE | |
21 | #include <limits.h> | |
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <string.h> | |
25 | #include <sys/socket.h> | |
26 | #include <sys/stat.h> | |
27 | #include <sys/types.h> | |
28 | #include <sys/un.h> | |
29 | #include <unistd.h> | |
30 | #include <assert.h> | |
57773204 | 31 | #include <errno.h> |
11ba4bcb | 32 | #include <fcntl.h> |
67c5b804 | 33 | |
32ce8569 | 34 | #include <lttng/ust-ctl.h> |
b728d87e | 35 | #include <ust-comm.h> |
6548fca4 | 36 | #include <ust-fd.h> |
74d81a6c | 37 | #include <helper.h> |
7bc53e94 | 38 | #include <lttng/ust-error.h> |
32ce8569 | 39 | #include <lttng/ust-events.h> |
53569322 | 40 | #include <lttng/ust-dynamic-type.h> |
32ce8569 MD |
41 | #include <usterr-signal-safe.h> |
42 | ||
43 | #include "../liblttng-ust/compat.h" | |
7bc53e94 MD |
44 | |
45 | #define USTCOMM_CODE_OFFSET(code) \ | |
46 | (code == LTTNG_UST_OK ? 0 : (code - LTTNG_UST_ERR + 1)) | |
67c5b804 | 47 | |
74d81a6c MD |
48 | #define USTCOMM_MAX_SEND_FDS 4 |
49 | ||
53569322 MD |
50 | static |
51 | ssize_t count_fields_recursive(size_t nr_fields, | |
52 | const struct lttng_event_field *lttng_fields); | |
53 | static | |
54 | int serialize_one_field(struct lttng_session *session, | |
55 | struct ustctl_field *fields, size_t *iter_output, | |
56 | const struct lttng_event_field *lf); | |
57 | ||
67c5b804 MD |
58 | /* |
59 | * Human readable error message. | |
60 | */ | |
57773204 | 61 | static const char *ustcomm_readable_code[] = { |
7bc53e94 MD |
62 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_OK) ] = "Success", |
63 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR) ] = "Unknown error", | |
64 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOENT) ] = "No entry", | |
64b2564e DG |
65 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXIST) ] = "Object already exists", |
66 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL) ] = "Invalid argument", | |
67 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PERM) ] = "Permission denied", | |
68 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOSYS) ] = "Not implemented", | |
74d81a6c | 69 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXITING) ] = "Process is exiting", |
32ce8569 MD |
70 | |
71 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_MAGIC) ] = "Invalid magic number", | |
72 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_SOCKET_TYPE) ] = "Invalid socket type", | |
73 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_UNSUP_MAJOR) ] = "Unsupported major version", | |
67c5b804 MD |
74 | }; |
75 | ||
76 | /* | |
7bc53e94 | 77 | * lttng_ust_strerror |
67c5b804 | 78 | * |
7bc53e94 MD |
79 | * Receives positive error value. |
80 | * Return ptr to string representing a human readable | |
81 | * error code from the ustcomm_return_code enum. | |
67c5b804 | 82 | */ |
7bc53e94 | 83 | const char *lttng_ust_strerror(int code) |
67c5b804 | 84 | { |
7bc53e94 MD |
85 | if (code == LTTNG_UST_OK) |
86 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
87 | if (code < LTTNG_UST_ERR) | |
88 | return strerror(code); | |
89 | if (code >= LTTNG_UST_ERR_NR) | |
90 | code = LTTNG_UST_ERR; | |
91 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
67c5b804 MD |
92 | } |
93 | ||
94 | /* | |
74d81a6c | 95 | * ustcomm_connect_unix_sock |
67c5b804 | 96 | * |
74d81a6c | 97 | * Connect to unix socket using the path name. |
6548fca4 MD |
98 | * |
99 | * Caller handles FD tracker. | |
67c5b804 | 100 | */ |
451d66b2 | 101 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
102 | { |
103 | struct sockaddr_un sun; | |
7bc53e94 | 104 | int fd, ret; |
67c5b804 | 105 | |
204d45df MD |
106 | /* |
107 | * libust threads require the close-on-exec flag for all | |
108 | * resources so it does not leak file descriptors upon exec. | |
109 | */ | |
11ba4bcb | 110 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
67c5b804 | 111 | if (fd < 0) { |
32ce8569 | 112 | PERROR("socket"); |
7bc53e94 | 113 | ret = -errno; |
67c5b804 MD |
114 | goto error; |
115 | } | |
451d66b2 MD |
116 | if (timeout >= 0) { |
117 | /* Give at least 10ms. */ | |
118 | if (timeout < 10) | |
119 | timeout = 10; | |
120 | ret = ustcomm_setsockopt_snd_timeout(fd, timeout); | |
121 | if (ret < 0) { | |
122 | WARN("Error setting connect socket send timeout"); | |
123 | } | |
124 | } | |
11ba4bcb MD |
125 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); |
126 | if (ret < 0) { | |
32ce8569 | 127 | PERROR("fcntl"); |
7bc53e94 | 128 | ret = -errno; |
11ba4bcb MD |
129 | goto error_fcntl; |
130 | } | |
67c5b804 MD |
131 | |
132 | memset(&sun, 0, sizeof(sun)); | |
133 | sun.sun_family = AF_UNIX; | |
134 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
135 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
136 | ||
137 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
138 | if (ret < 0) { | |
139 | /* | |
0b9aa170 MD |
140 | * Don't print message on connect ENOENT error, because |
141 | * connect is used in normal execution to detect if | |
142 | * sessiond is alive. ENOENT is when the unix socket | |
143 | * file does not exist, and ECONNREFUSED is when the | |
144 | * file exists but no sessiond is listening. | |
67c5b804 | 145 | */ |
0b9aa170 | 146 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 147 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 148 | PERROR("connect"); |
7bc53e94 | 149 | ret = -errno; |
8cf811d3 MD |
150 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
151 | ret = -EPIPE; | |
67c5b804 MD |
152 | goto error_connect; |
153 | } | |
154 | ||
155 | return fd; | |
156 | ||
157 | error_connect: | |
11ba4bcb | 158 | error_fcntl: |
7bc53e94 MD |
159 | { |
160 | int closeret; | |
161 | ||
162 | closeret = close(fd); | |
163 | if (closeret) | |
32ce8569 | 164 | PERROR("close"); |
7bc53e94 | 165 | } |
67c5b804 MD |
166 | error: |
167 | return ret; | |
168 | } | |
169 | ||
170 | /* | |
74d81a6c | 171 | * ustcomm_accept_unix_sock |
67c5b804 | 172 | * |
74d81a6c MD |
173 | * Do an accept(2) on the sock and return the |
174 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 175 | */ |
57773204 | 176 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
177 | { |
178 | int new_fd; | |
179 | struct sockaddr_un sun; | |
180 | socklen_t len = 0; | |
181 | ||
182 | /* Blocking call */ | |
183 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
184 | if (new_fd < 0) { | |
b869b5ae MD |
185 | if (errno != ECONNABORTED) |
186 | PERROR("accept"); | |
187 | new_fd = -errno; | |
188 | if (new_fd == -ECONNABORTED) | |
189 | new_fd = -EPIPE; | |
67c5b804 | 190 | } |
67c5b804 | 191 | return new_fd; |
67c5b804 MD |
192 | } |
193 | ||
194 | /* | |
74d81a6c | 195 | * ustcomm_create_unix_sock |
67c5b804 | 196 | * |
74d81a6c MD |
197 | * Creates a AF_UNIX local socket using pathname |
198 | * bind the socket upon creation and return the fd. | |
67c5b804 | 199 | */ |
57773204 | 200 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
201 | { |
202 | struct sockaddr_un sun; | |
7bc53e94 | 203 | int fd, ret; |
67c5b804 MD |
204 | |
205 | /* Create server socket */ | |
206 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 207 | PERROR("socket"); |
7bc53e94 | 208 | ret = -errno; |
67c5b804 MD |
209 | goto error; |
210 | } | |
211 | ||
212 | memset(&sun, 0, sizeof(sun)); | |
213 | sun.sun_family = AF_UNIX; | |
214 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
215 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
216 | ||
217 | /* Unlink the old file if present */ | |
218 | (void) unlink(pathname); | |
219 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
220 | if (ret < 0) { | |
32ce8569 | 221 | PERROR("bind"); |
7bc53e94 MD |
222 | ret = -errno; |
223 | goto error_close; | |
67c5b804 MD |
224 | } |
225 | ||
226 | return fd; | |
227 | ||
7bc53e94 MD |
228 | error_close: |
229 | { | |
230 | int closeret; | |
231 | ||
232 | closeret = close(fd); | |
233 | if (closeret) { | |
32ce8569 | 234 | PERROR("close"); |
7bc53e94 MD |
235 | } |
236 | } | |
67c5b804 MD |
237 | error: |
238 | return ret; | |
239 | } | |
240 | ||
241 | /* | |
74d81a6c | 242 | * ustcomm_listen_unix_sock |
67c5b804 | 243 | * |
74d81a6c | 244 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 245 | */ |
57773204 | 246 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
247 | { |
248 | int ret; | |
249 | ||
e41474be | 250 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 251 | if (ret < 0) { |
7bc53e94 | 252 | ret = -errno; |
32ce8569 | 253 | PERROR("listen"); |
67c5b804 MD |
254 | } |
255 | ||
256 | return ret; | |
257 | } | |
258 | ||
259 | /* | |
74d81a6c MD |
260 | * ustcomm_close_unix_sock |
261 | * | |
262 | * Shutdown cleanly a unix socket. | |
6548fca4 MD |
263 | * |
264 | * Handles fd tracker internally. | |
74d81a6c MD |
265 | */ |
266 | int ustcomm_close_unix_sock(int sock) | |
267 | { | |
268 | int ret; | |
269 | ||
6548fca4 | 270 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 271 | ret = close(sock); |
6548fca4 MD |
272 | if (!ret) { |
273 | lttng_ust_delete_fd_from_tracker(sock); | |
274 | } else { | |
32ce8569 | 275 | PERROR("close"); |
74d81a6c MD |
276 | ret = -errno; |
277 | } | |
6548fca4 | 278 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
279 | |
280 | return ret; | |
281 | } | |
282 | ||
283 | /* | |
284 | * ustcomm_recv_unix_sock | |
67c5b804 | 285 | * |
74d81a6c MD |
286 | * Receive data of size len in put that data into |
287 | * the buf param. Using recvmsg API. | |
288 | * Return the size of received data. | |
289 | * Return 0 on orderly shutdown. | |
67c5b804 | 290 | */ |
57773204 | 291 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 292 | { |
913b87f1 | 293 | struct msghdr msg; |
67c5b804 | 294 | struct iovec iov[1]; |
89c5b6ec MD |
295 | ssize_t ret = -1; |
296 | size_t len_last; | |
67c5b804 | 297 | |
913b87f1 MD |
298 | memset(&msg, 0, sizeof(msg)); |
299 | ||
67c5b804 MD |
300 | iov[0].iov_base = buf; |
301 | iov[0].iov_len = len; | |
302 | msg.msg_iov = iov; | |
303 | msg.msg_iovlen = 1; | |
304 | ||
7e3cfcbe | 305 | do { |
89c5b6ec | 306 | len_last = iov[0].iov_len; |
7e3cfcbe | 307 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
308 | if (ret > 0) { |
309 | iov[0].iov_base += ret; | |
310 | iov[0].iov_len -= ret; | |
311 | assert(ret <= len_last); | |
312 | } | |
313 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
314 | |
315 | if (ret < 0) { | |
316 | int shutret; | |
317 | ||
8cf811d3 | 318 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 319 | PERROR("recvmsg"); |
7bc53e94 | 320 | ret = -errno; |
8cf811d3 | 321 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 322 | ret = -EPIPE; |
7bc53e94 MD |
323 | |
324 | shutret = shutdown(sock, SHUT_RDWR); | |
325 | if (shutret) | |
32ce8569 | 326 | ERR("Socket shutdown error"); |
89c5b6ec MD |
327 | } else if (ret > 0) { |
328 | ret = len; | |
67c5b804 | 329 | } |
89c5b6ec | 330 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
331 | |
332 | return ret; | |
333 | } | |
334 | ||
335 | /* | |
74d81a6c | 336 | * ustcomm_send_unix_sock |
67c5b804 | 337 | * |
74d81a6c MD |
338 | * Send buf data of size len. Using sendmsg API. |
339 | * Return the size of sent data. | |
67c5b804 | 340 | */ |
32ce8569 | 341 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 342 | { |
913b87f1 | 343 | struct msghdr msg; |
67c5b804 | 344 | struct iovec iov[1]; |
7bc53e94 | 345 | ssize_t ret; |
67c5b804 | 346 | |
913b87f1 MD |
347 | memset(&msg, 0, sizeof(msg)); |
348 | ||
32ce8569 | 349 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
350 | iov[0].iov_len = len; |
351 | msg.msg_iov = iov; | |
352 | msg.msg_iovlen = 1; | |
353 | ||
1ea11eab MD |
354 | /* |
355 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
356 | * libust, so libust does not receive an unhandled SIGPIPE or | |
357 | * SIGURG. The sessiond receiver side can be made more resilient | |
358 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
359 | * libust side. | |
360 | */ | |
51d9d699 MD |
361 | do { |
362 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
363 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
364 | |
365 | if (ret < 0) { | |
366 | int shutret; | |
367 | ||
74d81a6c | 368 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 369 | PERROR("sendmsg"); |
7bc53e94 | 370 | ret = -errno; |
b869b5ae MD |
371 | if (ret == -ECONNRESET) |
372 | ret = -EPIPE; | |
7bc53e94 MD |
373 | |
374 | shutret = shutdown(sock, SHUT_RDWR); | |
375 | if (shutret) | |
32ce8569 | 376 | ERR("Socket shutdown error"); |
67c5b804 MD |
377 | } |
378 | ||
379 | return ret; | |
380 | } | |
381 | ||
382 | /* | |
74d81a6c | 383 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 384 | * |
74d81a6c | 385 | * Returns the size of data sent, or negative error value. |
67c5b804 | 386 | */ |
74d81a6c | 387 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 388 | { |
913b87f1 | 389 | struct msghdr msg; |
67c5b804 MD |
390 | struct cmsghdr *cmptr; |
391 | struct iovec iov[1]; | |
392 | ssize_t ret = -1; | |
393 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
394 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 395 | char dummy = 0; |
67c5b804 | 396 | |
913b87f1 | 397 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 398 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 399 | |
74d81a6c MD |
400 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
401 | return -EINVAL; | |
67c5b804 MD |
402 | |
403 | msg.msg_control = (caddr_t)tmp; | |
404 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
405 | ||
406 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
407 | if (!cmptr) |
408 | return -EINVAL; | |
67c5b804 MD |
409 | cmptr->cmsg_level = SOL_SOCKET; |
410 | cmptr->cmsg_type = SCM_RIGHTS; | |
411 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
412 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
413 | /* Sum of the length of all control messages in the buffer: */ | |
414 | msg.msg_controllen = cmptr->cmsg_len; | |
415 | ||
74d81a6c MD |
416 | iov[0].iov_base = &dummy; |
417 | iov[0].iov_len = 1; | |
67c5b804 MD |
418 | msg.msg_iov = iov; |
419 | msg.msg_iovlen = 1; | |
420 | ||
51d9d699 | 421 | do { |
0dafcd63 | 422 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 423 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 424 | if (ret < 0) { |
74d81a6c MD |
425 | /* |
426 | * We consider EPIPE and ECONNRESET as expected. | |
427 | */ | |
428 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 429 | PERROR("sendmsg"); |
74d81a6c | 430 | } |
b869b5ae MD |
431 | ret = -errno; |
432 | if (ret == -ECONNRESET) | |
433 | ret = -EPIPE; | |
74d81a6c MD |
434 | } |
435 | return ret; | |
436 | } | |
7bc53e94 | 437 | |
74d81a6c MD |
438 | /* |
439 | * Recv a message accompanied by fd(s) from a unix socket. | |
440 | * | |
441 | * Returns the size of received data, or negative error value. | |
442 | * | |
443 | * Expect at most "nb_fd" file descriptors. Returns the number of fd | |
444 | * actually received in nb_fd. | |
445 | * Returns -EPIPE on orderly shutdown. | |
446 | */ | |
447 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
448 | { | |
449 | struct iovec iov[1]; | |
450 | ssize_t ret = 0; | |
451 | struct cmsghdr *cmsg; | |
452 | size_t sizeof_fds = nb_fd * sizeof(int); | |
453 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
454 | struct msghdr msg; | |
455 | char dummy; | |
7bc53e94 | 456 | |
74d81a6c | 457 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 458 | |
74d81a6c MD |
459 | /* Prepare to receive the structures */ |
460 | iov[0].iov_base = &dummy; | |
461 | iov[0].iov_len = 1; | |
462 | msg.msg_iov = iov; | |
463 | msg.msg_iovlen = 1; | |
464 | msg.msg_control = recv_fd; | |
465 | msg.msg_controllen = sizeof(recv_fd); | |
466 | ||
467 | do { | |
468 | ret = recvmsg(sock, &msg, 0); | |
469 | } while (ret < 0 && errno == EINTR); | |
470 | if (ret < 0) { | |
471 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 472 | PERROR("recvmsg fds"); |
74d81a6c | 473 | } |
8cf811d3 | 474 | ret = -errno; |
b869b5ae MD |
475 | if (ret == -ECONNRESET) |
476 | ret = -EPIPE; | |
74d81a6c MD |
477 | goto end; |
478 | } | |
479 | if (ret == 0) { | |
480 | /* orderly shutdown */ | |
481 | ret = -EPIPE; | |
482 | goto end; | |
483 | } | |
484 | if (ret != 1) { | |
32ce8569 | 485 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
486 | ret, 1); |
487 | goto end; | |
488 | } | |
489 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 490 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
491 | ret = -1; |
492 | goto end; | |
493 | } | |
494 | cmsg = CMSG_FIRSTHDR(&msg); | |
495 | if (!cmsg) { | |
32ce8569 | 496 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
497 | ret = -1; |
498 | goto end; | |
499 | } | |
500 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 501 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
502 | ret = -1; |
503 | goto end; | |
504 | } | |
505 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 506 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
507 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
508 | ret = -1; | |
509 | goto end; | |
510 | } | |
511 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); | |
512 | ret = sizeof_fds; | |
513 | end: | |
67c5b804 MD |
514 | return ret; |
515 | } | |
57773204 MD |
516 | |
517 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
518 | { | |
519 | ssize_t len; | |
520 | ||
521 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
522 | switch (len) { | |
523 | case sizeof(*lum): | |
57773204 | 524 | break; |
57773204 | 525 | default: |
7bc53e94 | 526 | if (len < 0) { |
7bc53e94 MD |
527 | return len; |
528 | } else { | |
32ce8569 | 529 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
530 | return -EINVAL; |
531 | } | |
57773204 MD |
532 | } |
533 | return 0; | |
534 | } | |
535 | ||
536 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
537 | uint32_t expected_handle, uint32_t expected_cmd) | |
538 | { | |
539 | ssize_t len; | |
540 | ||
541 | memset(lur, 0, sizeof(*lur)); | |
542 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
543 | switch (len) { | |
544 | case 0: /* orderly shutdown */ | |
74d81a6c | 545 | return -EPIPE; |
57773204 | 546 | case sizeof(*lur): |
5dafeeaa MD |
547 | { |
548 | int err = 0; | |
549 | ||
57773204 | 550 | if (lur->handle != expected_handle) { |
32ce8569 | 551 | ERR("Unexpected result message handle: " |
74d81a6c MD |
552 | "expected: %u vs received: %u\n", |
553 | expected_handle, lur->handle); | |
5dafeeaa | 554 | err = 1; |
57773204 | 555 | } |
57773204 | 556 | if (lur->cmd != expected_cmd) { |
32ce8569 | 557 | ERR("Unexpected result message command " |
74d81a6c MD |
558 | "expected: %u vs received: %u\n", |
559 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
560 | err = 1; |
561 | } | |
562 | if (err) { | |
57773204 | 563 | return -EINVAL; |
5dafeeaa MD |
564 | } else { |
565 | return lur->ret_code; | |
57773204 | 566 | } |
5dafeeaa | 567 | } |
57773204 | 568 | default: |
8cf811d3 | 569 | if (len >= 0) { |
32ce8569 | 570 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 571 | } |
8cf811d3 | 572 | return len; |
57773204 MD |
573 | } |
574 | } | |
575 | ||
576 | int ustcomm_send_app_cmd(int sock, | |
577 | struct ustcomm_ust_msg *lum, | |
578 | struct ustcomm_ust_reply *lur) | |
579 | { | |
580 | int ret; | |
581 | ||
582 | ret = ustcomm_send_app_msg(sock, lum); | |
583 | if (ret) | |
584 | return ret; | |
c354a72c MD |
585 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
586 | if (ret > 0) | |
587 | return -EIO; | |
588 | return ret; | |
57773204 MD |
589 | } |
590 | ||
57773204 | 591 | /* |
74d81a6c MD |
592 | * chan_data is allocated internally if this function returns the |
593 | * expected var_len. | |
57773204 | 594 | */ |
74d81a6c | 595 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
596 | void **_chan_data, uint64_t var_len, |
597 | int *_wakeup_fd) | |
57773204 | 598 | { |
74d81a6c | 599 | void *chan_data; |
ff0f5728 | 600 | ssize_t len, nr_fd; |
f5c453e9 | 601 | int wakeup_fd, ret; |
57773204 | 602 | |
74d81a6c MD |
603 | if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) { |
604 | len = -EINVAL; | |
605 | goto error_check; | |
57773204 | 606 | } |
74d81a6c MD |
607 | /* Receive variable length data */ |
608 | chan_data = zmalloc(var_len); | |
609 | if (!chan_data) { | |
610 | len = -ENOMEM; | |
611 | goto error_alloc; | |
57773204 | 612 | } |
74d81a6c MD |
613 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
614 | if (len != var_len) { | |
615 | goto error_recv; | |
57773204 | 616 | } |
ff0f5728 | 617 | /* recv wakeup fd */ |
6548fca4 | 618 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
619 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
620 | if (nr_fd <= 0) { | |
6548fca4 | 621 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
622 | if (nr_fd < 0) { |
623 | len = nr_fd; | |
624 | goto error_recv; | |
625 | } else { | |
626 | len = -EIO; | |
627 | goto error_recv; | |
628 | } | |
629 | } | |
f5c453e9 JR |
630 | |
631 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
632 | if (ret < 0) { | |
633 | lttng_ust_unlock_fd_tracker(); | |
634 | ret = close(wakeup_fd); | |
635 | if (ret) { | |
636 | PERROR("close on wakeup_fd"); | |
637 | } | |
638 | len = -EIO; | |
639 | goto error_recv; | |
640 | } | |
641 | ||
642 | *_wakeup_fd = ret; | |
6548fca4 | 643 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 644 | |
74d81a6c MD |
645 | *_chan_data = chan_data; |
646 | return len; | |
647 | ||
648 | error_recv: | |
649 | free(chan_data); | |
650 | error_alloc: | |
651 | error_check: | |
652 | return len; | |
653 | } | |
7bc53e94 | 654 | |
74d81a6c MD |
655 | int ustcomm_recv_stream_from_sessiond(int sock, |
656 | uint64_t *memory_map_size, | |
657 | int *shm_fd, int *wakeup_fd) | |
658 | { | |
659 | ssize_t len; | |
660 | int ret; | |
661 | int fds[2]; | |
662 | ||
663 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 664 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
665 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
666 | if (len <= 0) { | |
6548fca4 | 667 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
668 | if (len < 0) { |
669 | ret = len; | |
670 | goto error; | |
671 | } else { | |
672 | ret = -EIO; | |
673 | goto error; | |
674 | } | |
7bc53e94 | 675 | } |
f5c453e9 JR |
676 | |
677 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
678 | if (ret < 0) { | |
679 | lttng_ust_unlock_fd_tracker(); | |
680 | ret = close(fds[0]); | |
681 | if (ret) { | |
682 | PERROR("close on received shm_fd"); | |
683 | } | |
684 | ret = -EIO; | |
685 | goto error; | |
686 | } | |
687 | *shm_fd = ret; | |
688 | ||
689 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
690 | if (ret < 0) { | |
691 | lttng_ust_unlock_fd_tracker(); | |
692 | ret = close(*shm_fd); | |
693 | if (ret) { | |
694 | PERROR("close on shm_fd"); | |
695 | } | |
696 | *shm_fd = -1; | |
697 | ret = close(fds[1]); | |
698 | if (ret) { | |
699 | PERROR("close on received wakeup_fd"); | |
700 | } | |
701 | ret = -EIO; | |
702 | goto error; | |
703 | } | |
704 | *wakeup_fd = ret; | |
6548fca4 | 705 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
706 | return 0; |
707 | ||
708 | error: | |
57773204 MD |
709 | return ret; |
710 | } | |
32ce8569 MD |
711 | |
712 | /* | |
713 | * Returns 0 on success, negative error value on error. | |
714 | */ | |
715 | int ustcomm_send_reg_msg(int sock, | |
716 | enum ustctl_socket_type type, | |
717 | uint32_t bits_per_long, | |
718 | uint32_t uint8_t_alignment, | |
719 | uint32_t uint16_t_alignment, | |
720 | uint32_t uint32_t_alignment, | |
721 | uint32_t uint64_t_alignment, | |
722 | uint32_t long_alignment) | |
723 | { | |
724 | ssize_t len; | |
725 | struct ustctl_reg_msg reg_msg; | |
726 | ||
727 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
728 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
729 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
730 | reg_msg.pid = getpid(); | |
731 | reg_msg.ppid = getppid(); | |
732 | reg_msg.uid = getuid(); | |
733 | reg_msg.gid = getgid(); | |
734 | reg_msg.bits_per_long = bits_per_long; | |
735 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
736 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
737 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
738 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
739 | reg_msg.long_alignment = long_alignment; | |
740 | reg_msg.socket_type = type; | |
741 | lttng_ust_getprocname(reg_msg.name); | |
742 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); | |
743 | ||
744 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
745 | if (len > 0 && len != sizeof(reg_msg)) | |
746 | return -EIO; | |
747 | if (len < 0) | |
748 | return len; | |
749 | return 0; | |
750 | } | |
751 | ||
53569322 MD |
752 | static |
753 | ssize_t count_one_type(const struct lttng_type *lt) | |
754 | { | |
755 | switch (lt->atype) { | |
756 | case atype_integer: | |
757 | case atype_float: | |
758 | case atype_string: | |
759 | case atype_enum: | |
760 | case atype_array: | |
761 | case atype_sequence: | |
762 | return 1; | |
763 | case atype_struct: | |
764 | //TODO: implement non-empty struct. | |
765 | return 1; | |
766 | case atype_dynamic: | |
767 | { | |
768 | const struct lttng_event_field *choices; | |
769 | size_t nr_choices; | |
770 | int ret; | |
771 | ||
772 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
773 | &choices); | |
774 | if (ret) | |
775 | return ret; | |
776 | /* | |
777 | * One field for enum, one field for variant, and | |
778 | * one field per choice. | |
779 | */ | |
780 | return count_fields_recursive(nr_choices, choices) + 2; | |
781 | } | |
782 | default: | |
783 | return -EINVAL; | |
784 | } | |
785 | return 0; | |
786 | } | |
787 | ||
788 | static | |
789 | ssize_t count_fields_recursive(size_t nr_fields, | |
790 | const struct lttng_event_field *lttng_fields) | |
791 | { | |
792 | int i; | |
793 | ssize_t ret, count = 0; | |
794 | ||
795 | for (i = 0; i < nr_fields; i++) { | |
796 | const struct lttng_event_field *lf; | |
797 | ||
798 | lf = <tng_fields[i]; | |
799 | /* skip 'nowrite' fields */ | |
800 | if (lf->nowrite) | |
801 | continue; | |
802 | ret = count_one_type(&lf->type); | |
803 | if (ret < 0) | |
804 | return ret; /* error */ | |
805 | count += ret; | |
806 | } | |
807 | return count; | |
808 | } | |
809 | ||
810 | static | |
811 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
812 | const struct lttng_ctx_field *lttng_fields) | |
813 | { | |
814 | int i; | |
815 | ssize_t ret, count = 0; | |
816 | ||
817 | for (i = 0; i < nr_fields; i++) { | |
818 | const struct lttng_event_field *lf; | |
819 | ||
820 | lf = <tng_fields[i].event_field; | |
821 | /* skip 'nowrite' fields */ | |
822 | if (lf->nowrite) | |
823 | continue; | |
824 | ret = count_one_type(&lf->type); | |
825 | if (ret < 0) | |
826 | return ret; /* error */ | |
827 | count += ret; | |
828 | } | |
829 | return count; | |
830 | } | |
831 | ||
7f2348b8 | 832 | static |
735ea6a8 | 833 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
834 | enum lttng_string_encodings le) |
835 | { | |
836 | switch (le) { | |
837 | case lttng_encode_none: | |
838 | *ue = ustctl_encode_none; | |
839 | break; | |
840 | case lttng_encode_UTF8: | |
841 | *ue = ustctl_encode_UTF8; | |
842 | break; | |
843 | case lttng_encode_ASCII: | |
844 | *ue = ustctl_encode_ASCII; | |
845 | break; | |
846 | default: | |
847 | return -EINVAL; | |
848 | } | |
849 | return 0; | |
850 | } | |
851 | ||
32ce8569 | 852 | static |
c785c634 MD |
853 | int serialize_integer_type(struct ustctl_integer_type *uit, |
854 | const struct lttng_integer_type *lit) | |
855 | { | |
856 | uit->size = lit->size; | |
857 | uit->signedness = lit->signedness; | |
858 | uit->reverse_byte_order = lit->reverse_byte_order; | |
859 | uit->base = lit->base; | |
860 | if (serialize_string_encoding(&uit->encoding, lit->encoding)) | |
861 | return -EINVAL; | |
862 | uit->alignment = lit->alignment; | |
863 | return 0; | |
864 | } | |
865 | ||
866 | static | |
867 | int serialize_basic_type(struct lttng_session *session, | |
868 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 869 | enum lttng_abstract_types atype, |
32ce8569 MD |
870 | union _ustctl_basic_type *ubt, |
871 | const union _lttng_basic_type *lbt) | |
872 | { | |
873 | switch (atype) { | |
874 | case atype_integer: | |
875 | { | |
c785c634 | 876 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 877 | return -EINVAL; |
2b213b16 | 878 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
879 | break; |
880 | } | |
881 | case atype_string: | |
882 | { | |
7f2348b8 MD |
883 | if (serialize_string_encoding(&ubt->string.encoding, |
884 | lbt->string.encoding)) | |
885 | return -EINVAL; | |
2b213b16 | 886 | *uatype = ustctl_atype_string; |
32ce8569 MD |
887 | break; |
888 | } | |
889 | case atype_float: | |
890 | { | |
891 | struct ustctl_float_type *uft; | |
892 | const struct lttng_float_type *lft; | |
893 | ||
894 | uft = &ubt->_float; | |
895 | lft = &lbt->_float; | |
896 | uft->exp_dig = lft->exp_dig; | |
897 | uft->mant_dig = lft->mant_dig; | |
898 | uft->alignment = lft->alignment; | |
899 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 900 | *uatype = ustctl_atype_float; |
32ce8569 MD |
901 | break; |
902 | } | |
903 | case atype_enum: | |
c785c634 MD |
904 | { |
905 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
906 | LTTNG_UST_SYM_NAME_LEN); | |
907 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
908 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
909 | &lbt->enumeration.container_type)) | |
910 | return -EINVAL; | |
911 | if (session) { | |
912 | const struct lttng_enum *_enum; | |
913 | ||
b33b46f7 | 914 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
915 | if (!_enum) |
916 | return -EINVAL; | |
917 | ubt->enumeration.id = _enum->id; | |
918 | } else { | |
919 | ubt->enumeration.id = -1ULL; | |
920 | } | |
921 | *uatype = ustctl_atype_enum; | |
922 | break; | |
923 | } | |
32ce8569 MD |
924 | case atype_array: |
925 | case atype_sequence: | |
926 | default: | |
927 | return -EINVAL; | |
928 | } | |
929 | return 0; | |
32ce8569 MD |
930 | } |
931 | ||
932 | static | |
53569322 MD |
933 | int serialize_dynamic_type(struct lttng_session *session, |
934 | struct ustctl_field *fields, size_t *iter_output, | |
935 | const struct lttng_event_field *lf) | |
32ce8569 | 936 | { |
53569322 MD |
937 | const struct lttng_event_field *choices; |
938 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
939 | const struct lttng_type *tag_type; | |
940 | const struct lttng_event_field *tag_field_generic; | |
941 | struct lttng_event_field tag_field = { | |
942 | .name = tag_field_name, | |
943 | .nowrite = 0, | |
944 | }; | |
945 | struct ustctl_field *uf; | |
946 | size_t nr_choices, i; | |
32ce8569 MD |
947 | int ret; |
948 | ||
53569322 MD |
949 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
950 | tag_type = &tag_field_generic->type; | |
951 | ||
952 | /* Serialize enum field. */ | |
953 | strncpy(tag_field_name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
954 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
955 | strncat(tag_field_name, | |
956 | "_tag", | |
957 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
958 | tag_field.type = *tag_type; | |
959 | ret = serialize_one_field(session, fields, iter_output, | |
960 | &tag_field); | |
961 | if (ret) | |
962 | return ret; | |
963 | ||
964 | /* Serialize variant field. */ | |
965 | uf = &fields[*iter_output]; | |
966 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
967 | if (ret) | |
968 | return ret; | |
969 | ||
970 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
971 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
972 | uf->type.atype = ustctl_atype_variant; | |
973 | uf->type.u.variant.nr_choices = nr_choices; | |
974 | strncpy(uf->type.u.variant.tag_name, | |
975 | tag_field_name, | |
976 | LTTNG_UST_SYM_NAME_LEN); | |
977 | uf->type.u.variant.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
978 | (*iter_output)++; | |
979 | ||
980 | /* Serialize choice fields after variant. */ | |
981 | for (i = 0; i < nr_choices; i++) { | |
982 | ret = serialize_one_field(session, fields, | |
983 | iter_output, &choices[i]); | |
984 | if (ret) | |
985 | return ret; | |
986 | } | |
987 | return 0; | |
988 | } | |
989 | ||
990 | static | |
991 | int serialize_one_field(struct lttng_session *session, | |
992 | struct ustctl_field *fields, size_t *iter_output, | |
993 | const struct lttng_event_field *lf) | |
994 | { | |
995 | const struct lttng_type *lt = &lf->type; | |
996 | int ret; | |
997 | ||
998 | /* skip 'nowrite' fields */ | |
999 | if (lf->nowrite) | |
1000 | return 0; | |
1001 | ||
32ce8569 MD |
1002 | switch (lt->atype) { |
1003 | case atype_integer: | |
1004 | case atype_float: | |
1005 | case atype_string: | |
c785c634 | 1006 | case atype_enum: |
53569322 MD |
1007 | { |
1008 | struct ustctl_field *uf = &fields[*iter_output]; | |
1009 | struct ustctl_type *ut = &uf->type; | |
1010 | ||
1011 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1012 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
c785c634 | 1013 | ret = serialize_basic_type(session, &ut->atype, lt->atype, |
32ce8569 MD |
1014 | &ut->u.basic, <->u.basic); |
1015 | if (ret) | |
1016 | return ret; | |
53569322 | 1017 | (*iter_output)++; |
32ce8569 | 1018 | break; |
53569322 | 1019 | } |
32ce8569 MD |
1020 | case atype_array: |
1021 | { | |
53569322 MD |
1022 | struct ustctl_field *uf = &fields[*iter_output]; |
1023 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1024 | struct ustctl_basic_type *ubt; |
1025 | const struct lttng_basic_type *lbt; | |
32ce8569 | 1026 | |
53569322 MD |
1027 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1028 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1029 | uf->type.atype = ustctl_atype_array; | |
32ce8569 MD |
1030 | ubt = &ut->u.array.elem_type; |
1031 | lbt = <->u.array.elem_type; | |
1032 | ut->u.array.length = lt->u.array.length; | |
c785c634 | 1033 | ret = serialize_basic_type(session, &ubt->atype, lbt->atype, |
32ce8569 MD |
1034 | &ubt->u.basic, &lbt->u.basic); |
1035 | if (ret) | |
1036 | return -EINVAL; | |
2b213b16 | 1037 | ut->atype = ustctl_atype_array; |
53569322 | 1038 | (*iter_output)++; |
32ce8569 MD |
1039 | break; |
1040 | } | |
1041 | case atype_sequence: | |
1042 | { | |
53569322 MD |
1043 | struct ustctl_field *uf = &fields[*iter_output]; |
1044 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1045 | struct ustctl_basic_type *ubt; |
1046 | const struct lttng_basic_type *lbt; | |
1047 | int ret; | |
1048 | ||
53569322 MD |
1049 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); |
1050 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1051 | uf->type.atype = ustctl_atype_sequence; | |
32ce8569 MD |
1052 | ubt = &ut->u.sequence.length_type; |
1053 | lbt = <->u.sequence.length_type; | |
c785c634 | 1054 | ret = serialize_basic_type(session, &ubt->atype, lbt->atype, |
32ce8569 MD |
1055 | &ubt->u.basic, &lbt->u.basic); |
1056 | if (ret) | |
1057 | return -EINVAL; | |
1058 | ubt = &ut->u.sequence.elem_type; | |
1059 | lbt = <->u.sequence.elem_type; | |
c785c634 | 1060 | ret = serialize_basic_type(session, &ubt->atype, lbt->atype, |
32ce8569 MD |
1061 | &ubt->u.basic, &lbt->u.basic); |
1062 | if (ret) | |
1063 | return -EINVAL; | |
2b213b16 | 1064 | ut->atype = ustctl_atype_sequence; |
53569322 MD |
1065 | (*iter_output)++; |
1066 | break; | |
1067 | } | |
1068 | case atype_dynamic: | |
1069 | { | |
1070 | ret = serialize_dynamic_type(session, fields, iter_output, lf); | |
1071 | if (ret) | |
1072 | return -EINVAL; | |
1073 | break; | |
1074 | } | |
1075 | case atype_struct: | |
1076 | { | |
1077 | struct ustctl_field *uf = &fields[*iter_output]; | |
1078 | ||
1079 | /* | |
1080 | * TODO: add support for non-empty struct. | |
1081 | */ | |
1082 | if (lf->type.u._struct.nr_fields != 0) { | |
1083 | return -EINVAL; | |
1084 | } | |
1085 | strncpy(uf->name, lf->name, LTTNG_UST_SYM_NAME_LEN); | |
1086 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1087 | uf->type.atype = ustctl_atype_struct; | |
1088 | uf->type.u._struct.nr_fields = 0; | |
1089 | (*iter_output)++; | |
32ce8569 MD |
1090 | break; |
1091 | } | |
32ce8569 MD |
1092 | default: |
1093 | return -EINVAL; | |
1094 | } | |
1095 | return 0; | |
1096 | } | |
1097 | ||
1098 | static | |
c785c634 MD |
1099 | int serialize_fields(struct lttng_session *session, |
1100 | size_t *_nr_write_fields, | |
32ce8569 MD |
1101 | struct ustctl_field **ustctl_fields, |
1102 | size_t nr_fields, | |
1103 | const struct lttng_event_field *lttng_fields) | |
1104 | { | |
1105 | struct ustctl_field *fields; | |
53569322 MD |
1106 | int ret; |
1107 | size_t i, iter_output = 0; | |
1108 | ssize_t nr_write_fields; | |
1109 | ||
1110 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1111 | if (nr_write_fields < 0) { | |
1112 | return (int) nr_write_fields; | |
1113 | } | |
32ce8569 | 1114 | |
53569322 | 1115 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1116 | if (!fields) |
1117 | return -ENOMEM; | |
1118 | ||
1119 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1120 | ret = serialize_one_field(session, fields, &iter_output, |
1121 | <tng_fields[i]); | |
32ce8569 MD |
1122 | if (ret) |
1123 | goto error_type; | |
32ce8569 MD |
1124 | } |
1125 | ||
1126 | *_nr_write_fields = nr_write_fields; | |
1127 | *ustctl_fields = fields; | |
1128 | return 0; | |
1129 | ||
1130 | error_type: | |
1131 | free(fields); | |
1132 | return ret; | |
1133 | } | |
1134 | ||
c785c634 MD |
1135 | static |
1136 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1137 | size_t nr_entries, | |
1138 | const struct lttng_enum_entry *lttng_entries) | |
1139 | { | |
1140 | struct ustctl_enum_entry *entries; | |
1141 | int i; | |
1142 | ||
1143 | /* Serialize the entries */ | |
1144 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1145 | if (!entries) | |
1146 | return -ENOMEM; | |
1147 | for (i = 0; i < nr_entries; i++) { | |
1148 | struct ustctl_enum_entry *uentry; | |
1149 | const struct lttng_enum_entry *lentry; | |
1150 | ||
1151 | uentry = &entries[i]; | |
1152 | lentry = <tng_entries[i]; | |
1153 | ||
a6f80644 MD |
1154 | uentry->start.value = lentry->start.value; |
1155 | uentry->start.signedness = lentry->start.signedness; | |
1156 | uentry->end.value = lentry->end.value; | |
1157 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1158 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1159 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1160 | |
1161 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1162 | uentry->u.extra.options |= | |
1163 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1164 | } | |
c785c634 MD |
1165 | } |
1166 | *_entries = entries; | |
1167 | return 0; | |
1168 | } | |
1169 | ||
83e43212 | 1170 | static |
53569322 MD |
1171 | int serialize_ctx_fields(struct lttng_session *session, |
1172 | size_t *_nr_write_fields, | |
83e43212 MD |
1173 | struct ustctl_field **ustctl_fields, |
1174 | size_t nr_fields, | |
1175 | const struct lttng_ctx_field *lttng_fields) | |
1176 | { | |
1177 | struct ustctl_field *fields; | |
53569322 MD |
1178 | int ret; |
1179 | size_t i, iter_output = 0; | |
1180 | ssize_t nr_write_fields; | |
83e43212 | 1181 | |
53569322 MD |
1182 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1183 | lttng_fields); | |
1184 | if (nr_write_fields < 0) { | |
1185 | return (int) nr_write_fields; | |
1186 | } | |
1187 | ||
1188 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1189 | if (!fields) |
1190 | return -ENOMEM; | |
1191 | ||
1192 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1193 | ret = serialize_one_field(session, fields, &iter_output, |
1194 | <tng_fields[i].event_field); | |
83e43212 MD |
1195 | if (ret) |
1196 | goto error_type; | |
83e43212 MD |
1197 | } |
1198 | ||
1199 | *_nr_write_fields = nr_write_fields; | |
1200 | *ustctl_fields = fields; | |
1201 | return 0; | |
1202 | ||
1203 | error_type: | |
1204 | free(fields); | |
1205 | return ret; | |
1206 | } | |
1207 | ||
32ce8569 MD |
1208 | /* |
1209 | * Returns 0 on success, negative error value on error. | |
1210 | */ | |
1211 | int ustcomm_register_event(int sock, | |
c785c634 | 1212 | struct lttng_session *session, |
32ce8569 MD |
1213 | int session_objd, /* session descriptor */ |
1214 | int channel_objd, /* channel descriptor */ | |
1215 | const char *event_name, /* event name (input) */ | |
1216 | int loglevel, | |
1217 | const char *signature, /* event signature (input) */ | |
1218 | size_t nr_fields, /* fields */ | |
1219 | const struct lttng_event_field *lttng_fields, | |
1220 | const char *model_emf_uri, | |
1221 | uint32_t *id) /* event id (output) */ | |
1222 | { | |
1223 | ssize_t len; | |
1224 | struct { | |
1225 | struct ustcomm_notify_hdr header; | |
1226 | struct ustcomm_notify_event_msg m; | |
1227 | } msg; | |
1228 | struct { | |
1229 | struct ustcomm_notify_hdr header; | |
1230 | struct ustcomm_notify_event_reply r; | |
1231 | } reply; | |
1232 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1233 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1234 | size_t nr_write_fields = 0; |
1235 | int ret; | |
1236 | ||
1237 | memset(&msg, 0, sizeof(msg)); | |
1238 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1239 | msg.m.session_objd = session_objd; | |
1240 | msg.m.channel_objd = channel_objd; | |
1241 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1242 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1243 | msg.m.loglevel = loglevel; | |
1244 | signature_len = strlen(signature) + 1; | |
1245 | msg.m.signature_len = signature_len; | |
1246 | ||
1247 | /* Calculate fields len, serialize fields. */ | |
1248 | if (nr_fields > 0) { | |
c785c634 | 1249 | ret = serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1250 | nr_fields, lttng_fields); |
1251 | if (ret) | |
1252 | return ret; | |
1253 | } | |
1254 | ||
1255 | fields_len = sizeof(*fields) * nr_write_fields; | |
1256 | msg.m.fields_len = fields_len; | |
1257 | if (model_emf_uri) { | |
1258 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1259 | } else { | |
1260 | model_emf_uri_len = 0; | |
1261 | } | |
1262 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1263 | |
32ce8569 MD |
1264 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1265 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1266 | ret = -EIO; |
1267 | goto error_fields; | |
32ce8569 MD |
1268 | } |
1269 | if (len < 0) { | |
c785c634 MD |
1270 | ret = len; |
1271 | goto error_fields; | |
32ce8569 MD |
1272 | } |
1273 | ||
1274 | /* send signature */ | |
1275 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1276 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1277 | ret = -EIO; |
1278 | goto error_fields; | |
32ce8569 MD |
1279 | } |
1280 | if (len < 0) { | |
6b95617c MD |
1281 | ret = len; |
1282 | goto error_fields; | |
32ce8569 MD |
1283 | } |
1284 | ||
1285 | /* send fields */ | |
1286 | if (fields_len > 0) { | |
1287 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1288 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1289 | ret = -EIO; |
1290 | goto error_fields; | |
32ce8569 MD |
1291 | } |
1292 | if (len < 0) { | |
c785c634 MD |
1293 | ret = len; |
1294 | goto error_fields; | |
32ce8569 MD |
1295 | } |
1296 | } | |
6b95617c | 1297 | free(fields); |
32ce8569 MD |
1298 | |
1299 | if (model_emf_uri_len) { | |
1300 | /* send model_emf_uri */ | |
1301 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1302 | model_emf_uri_len); | |
c785c634 | 1303 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1304 | return -EIO; |
c785c634 MD |
1305 | } |
1306 | if (len < 0) { | |
6b95617c | 1307 | return len; |
c785c634 | 1308 | } |
32ce8569 MD |
1309 | } |
1310 | ||
1311 | /* receive reply */ | |
1312 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1313 | switch (len) { | |
1314 | case 0: /* orderly shutdown */ | |
1315 | return -EPIPE; | |
1316 | case sizeof(reply): | |
1317 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1318 | ERR("Unexpected result message command " | |
1319 | "expected: %u vs received: %u\n", | |
1320 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1321 | return -EINVAL; | |
1322 | } | |
1323 | if (reply.r.ret_code > 0) | |
1324 | return -EINVAL; | |
1325 | if (reply.r.ret_code < 0) | |
1326 | return reply.r.ret_code; | |
1327 | *id = reply.r.event_id; | |
1328 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1329 | event_name, reply.r.ret_code, reply.r.event_id); | |
1330 | return 0; | |
1331 | default: | |
1332 | if (len < 0) { | |
1333 | /* Transport level error */ | |
1334 | if (errno == EPIPE || errno == ECONNRESET) | |
1335 | len = -errno; | |
1336 | return len; | |
1337 | } else { | |
1338 | ERR("incorrect message size: %zd\n", len); | |
1339 | return len; | |
1340 | } | |
1341 | } | |
6b95617c | 1342 | /* Unreached. */ |
c785c634 | 1343 | |
6b95617c | 1344 | /* Error path only. */ |
c785c634 MD |
1345 | error_fields: |
1346 | free(fields); | |
1347 | return ret; | |
1348 | } | |
1349 | ||
1350 | /* | |
1351 | * Returns 0 on success, negative error value on error. | |
1352 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1353 | */ | |
1354 | int ustcomm_register_enum(int sock, | |
1355 | int session_objd, /* session descriptor */ | |
1356 | const char *enum_name, /* enum name (input) */ | |
1357 | size_t nr_entries, /* entries */ | |
1358 | const struct lttng_enum_entry *lttng_entries, | |
1359 | uint64_t *id) | |
1360 | { | |
1361 | ssize_t len; | |
1362 | struct { | |
1363 | struct ustcomm_notify_hdr header; | |
1364 | struct ustcomm_notify_enum_msg m; | |
1365 | } msg; | |
1366 | struct { | |
1367 | struct ustcomm_notify_hdr header; | |
1368 | struct ustcomm_notify_enum_reply r; | |
1369 | } reply; | |
1370 | size_t entries_len; | |
1371 | struct ustctl_enum_entry *entries = NULL; | |
1372 | int ret; | |
1373 | ||
1374 | memset(&msg, 0, sizeof(msg)); | |
1375 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1376 | msg.m.session_objd = session_objd; | |
1377 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1378 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1379 | ||
1380 | /* Calculate entries len, serialize entries. */ | |
1381 | if (nr_entries > 0) { | |
1382 | ret = serialize_entries(&entries, | |
1383 | nr_entries, lttng_entries); | |
1384 | if (ret) | |
1385 | return ret; | |
1386 | } | |
1387 | ||
1388 | entries_len = sizeof(*entries) * nr_entries; | |
1389 | msg.m.entries_len = entries_len; | |
1390 | ||
1391 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1392 | if (len > 0 && len != sizeof(msg)) { | |
1393 | ret = -EIO; | |
1394 | goto error_entries; | |
1395 | } | |
1396 | if (len < 0) { | |
1397 | ret = len; | |
1398 | goto error_entries; | |
1399 | } | |
1400 | ||
1401 | /* send entries */ | |
1402 | if (entries_len > 0) { | |
1403 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1404 | if (len > 0 && len != entries_len) { | |
1405 | ret = -EIO; | |
1406 | goto error_entries; | |
1407 | } | |
1408 | if (len < 0) { | |
1409 | ret = len; | |
1410 | goto error_entries; | |
1411 | } | |
1412 | } | |
1413 | free(entries); | |
1414 | entries = NULL; | |
1415 | ||
1416 | /* receive reply */ | |
1417 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1418 | switch (len) { | |
1419 | case 0: /* orderly shutdown */ | |
1420 | return -EPIPE; | |
1421 | case sizeof(reply): | |
1422 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1423 | ERR("Unexpected result message command " | |
1424 | "expected: %u vs received: %u\n", | |
1425 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1426 | return -EINVAL; | |
1427 | } | |
1428 | if (reply.r.ret_code > 0) | |
1429 | return -EINVAL; | |
1430 | if (reply.r.ret_code < 0) | |
1431 | return reply.r.ret_code; | |
1432 | *id = reply.r.enum_id; | |
1433 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1434 | enum_name, reply.r.ret_code); | |
1435 | return 0; | |
1436 | default: | |
1437 | if (len < 0) { | |
1438 | /* Transport level error */ | |
1439 | if (errno == EPIPE || errno == ECONNRESET) | |
1440 | len = -errno; | |
1441 | return len; | |
1442 | } else { | |
1443 | ERR("incorrect message size: %zd\n", len); | |
1444 | return len; | |
1445 | } | |
1446 | } | |
1447 | return ret; | |
1448 | ||
1449 | error_entries: | |
1450 | free(entries); | |
1451 | return ret; | |
32ce8569 MD |
1452 | } |
1453 | ||
1454 | /* | |
1455 | * Returns 0 on success, negative error value on error. | |
1456 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1457 | */ | |
1458 | int ustcomm_register_channel(int sock, | |
53569322 | 1459 | struct lttng_session *session, |
32ce8569 MD |
1460 | int session_objd, /* session descriptor */ |
1461 | int channel_objd, /* channel descriptor */ | |
1462 | size_t nr_ctx_fields, | |
83e43212 | 1463 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1464 | uint32_t *chan_id, /* channel id (output) */ |
1465 | int *header_type) /* header type (output) */ | |
1466 | { | |
1467 | ssize_t len; | |
1468 | struct { | |
1469 | struct ustcomm_notify_hdr header; | |
1470 | struct ustcomm_notify_channel_msg m; | |
1471 | } msg; | |
1472 | struct { | |
1473 | struct ustcomm_notify_hdr header; | |
1474 | struct ustcomm_notify_channel_reply r; | |
1475 | } reply; | |
1476 | size_t fields_len; | |
83e43212 | 1477 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1478 | int ret; |
1479 | size_t nr_write_fields = 0; | |
1480 | ||
1481 | memset(&msg, 0, sizeof(msg)); | |
1482 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1483 | msg.m.session_objd = session_objd; | |
1484 | msg.m.channel_objd = channel_objd; | |
1485 | ||
1486 | /* Calculate fields len, serialize fields. */ | |
1487 | if (nr_ctx_fields > 0) { | |
53569322 | 1488 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1489 | nr_ctx_fields, ctx_fields); |
1490 | if (ret) | |
1491 | return ret; | |
1492 | } | |
1493 | ||
1494 | fields_len = sizeof(*fields) * nr_write_fields; | |
1495 | msg.m.ctx_fields_len = fields_len; | |
1496 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1497 | if (len > 0 && len != sizeof(msg)) { | |
1498 | free(fields); | |
1499 | return -EIO; | |
1500 | } | |
1501 | if (len < 0) { | |
1502 | free(fields); | |
1503 | return len; | |
1504 | } | |
1505 | ||
1506 | /* send fields */ | |
1507 | if (fields_len > 0) { | |
1508 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1509 | free(fields); | |
1510 | if (len > 0 && len != fields_len) { | |
1511 | return -EIO; | |
1512 | } | |
1513 | if (len < 0) { | |
1514 | return len; | |
1515 | } | |
17ea789c MD |
1516 | } else { |
1517 | free(fields); | |
32ce8569 MD |
1518 | } |
1519 | ||
1520 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1521 | switch (len) { | |
1522 | case 0: /* orderly shutdown */ | |
1523 | return -EPIPE; | |
1524 | case sizeof(reply): | |
1525 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1526 | ERR("Unexpected result message command " | |
1527 | "expected: %u vs received: %u\n", | |
1528 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1529 | return -EINVAL; | |
1530 | } | |
1531 | if (reply.r.ret_code > 0) | |
1532 | return -EINVAL; | |
1533 | if (reply.r.ret_code < 0) | |
1534 | return reply.r.ret_code; | |
1535 | *chan_id = reply.r.chan_id; | |
1536 | switch (reply.r.header_type) { | |
1537 | case 1: | |
1538 | case 2: | |
1539 | *header_type = reply.r.header_type; | |
1540 | break; | |
1541 | default: | |
1542 | ERR("Unexpected channel header type %u\n", | |
1543 | reply.r.header_type); | |
1544 | return -EINVAL; | |
1545 | } | |
1546 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1547 | reply.r.chan_id, reply.r.header_type); | |
1548 | return 0; | |
1549 | default: | |
1550 | if (len < 0) { | |
1551 | /* Transport level error */ | |
1552 | if (errno == EPIPE || errno == ECONNRESET) | |
1553 | len = -errno; | |
1554 | return len; | |
1555 | } else { | |
1556 | ERR("incorrect message size: %zd\n", len); | |
1557 | return len; | |
1558 | } | |
1559 | } | |
1560 | } | |
ff517991 MD |
1561 | |
1562 | /* | |
1563 | * Set socket reciving timeout. | |
1564 | */ | |
1565 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1566 | { | |
1567 | int ret; | |
1568 | struct timeval tv; | |
1569 | ||
1570 | tv.tv_sec = msec / 1000; | |
1571 | tv.tv_usec = (msec * 1000 % 1000000); | |
1572 | ||
1573 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1574 | if (ret < 0) { | |
1575 | PERROR("setsockopt SO_RCVTIMEO"); | |
1576 | ret = -errno; | |
1577 | } | |
1578 | ||
1579 | return ret; | |
1580 | } | |
1581 | ||
1582 | /* | |
1583 | * Set socket sending timeout. | |
1584 | */ | |
1585 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1586 | { | |
1587 | int ret; | |
1588 | struct timeval tv; | |
1589 | ||
1590 | tv.tv_sec = msec / 1000; | |
1591 | tv.tv_usec = (msec * 1000) % 1000000; | |
1592 | ||
1593 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1594 | if (ret < 0) { | |
1595 | PERROR("setsockopt SO_SNDTIMEO"); | |
1596 | ret = -errno; | |
1597 | } | |
1598 | ||
1599 | return ret; | |
1600 | } |