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