Commit | Line | Data |
---|---|---|
67c5b804 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
67c5b804 | 3 | * |
c0c0989a MJ |
4 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
5 | * Copyright (C) 2011-2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
67c5b804 MD |
6 | */ |
7 | ||
67c5b804 | 8 | #include <limits.h> |
fb31eb73 | 9 | #include <stdint.h> |
67c5b804 MD |
10 | #include <stdio.h> |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <sys/socket.h> | |
14 | #include <sys/stat.h> | |
15 | #include <sys/types.h> | |
16 | #include <sys/un.h> | |
17 | #include <unistd.h> | |
18 | #include <assert.h> | |
57773204 | 19 | #include <errno.h> |
11ba4bcb | 20 | #include <fcntl.h> |
67c5b804 | 21 | |
32ce8569 | 22 | #include <lttng/ust-ctl.h> |
b728d87e | 23 | #include <ust-comm.h> |
6548fca4 | 24 | #include <ust-fd.h> |
864a1eda | 25 | #include <ust-helper.h> |
7bc53e94 | 26 | #include <lttng/ust-error.h> |
32ce8569 | 27 | #include <lttng/ust-events.h> |
ae4b659d | 28 | #include <ust-dynamic-type.h> |
32ce8569 MD |
29 | #include <usterr-signal-safe.h> |
30 | ||
31 | #include "../liblttng-ust/compat.h" | |
7bc53e94 MD |
32 | |
33 | #define USTCOMM_CODE_OFFSET(code) \ | |
34 | (code == LTTNG_UST_OK ? 0 : (code - LTTNG_UST_ERR + 1)) | |
67c5b804 | 35 | |
74d81a6c MD |
36 | #define USTCOMM_MAX_SEND_FDS 4 |
37 | ||
53569322 MD |
38 | static |
39 | ssize_t count_fields_recursive(size_t nr_fields, | |
40 | const struct lttng_event_field *lttng_fields); | |
41 | static | |
42 | int serialize_one_field(struct lttng_session *session, | |
43 | struct ustctl_field *fields, size_t *iter_output, | |
44 | const struct lttng_event_field *lf); | |
218deb69 MD |
45 | static |
46 | int serialize_fields(struct lttng_session *session, | |
47 | struct ustctl_field *ustctl_fields, | |
48 | size_t *iter_output, size_t nr_lttng_fields, | |
49 | const struct lttng_event_field *lttng_fields); | |
53569322 | 50 | |
67c5b804 MD |
51 | /* |
52 | * Human readable error message. | |
53 | */ | |
57773204 | 54 | static const char *ustcomm_readable_code[] = { |
7bc53e94 MD |
55 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_OK) ] = "Success", |
56 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR) ] = "Unknown error", | |
57 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOENT) ] = "No entry", | |
64b2564e DG |
58 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXIST) ] = "Object already exists", |
59 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL) ] = "Invalid argument", | |
60 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PERM) ] = "Permission denied", | |
61 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOSYS) ] = "Not implemented", | |
74d81a6c | 62 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXITING) ] = "Process is exiting", |
32ce8569 MD |
63 | |
64 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_MAGIC) ] = "Invalid magic number", | |
65 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_SOCKET_TYPE) ] = "Invalid socket type", | |
66 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_UNSUP_MAJOR) ] = "Unsupported major version", | |
a834901f MD |
67 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PEERCRED) ] = "Cannot get unix socket peer credentials", |
68 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PEERCRED_PID) ] = "Peer credentials PID is invalid. Socket appears to belong to a distinct, non-nested pid namespace.", | |
67c5b804 MD |
69 | }; |
70 | ||
71 | /* | |
7bc53e94 | 72 | * lttng_ust_strerror |
67c5b804 | 73 | * |
7bc53e94 MD |
74 | * Receives positive error value. |
75 | * Return ptr to string representing a human readable | |
76 | * error code from the ustcomm_return_code enum. | |
67c5b804 | 77 | */ |
7bc53e94 | 78 | const char *lttng_ust_strerror(int code) |
67c5b804 | 79 | { |
7bc53e94 MD |
80 | if (code == LTTNG_UST_OK) |
81 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
82 | if (code < LTTNG_UST_ERR) | |
83 | return strerror(code); | |
84 | if (code >= LTTNG_UST_ERR_NR) | |
85 | code = LTTNG_UST_ERR; | |
86 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
67c5b804 MD |
87 | } |
88 | ||
89 | /* | |
74d81a6c | 90 | * ustcomm_connect_unix_sock |
67c5b804 | 91 | * |
74d81a6c | 92 | * Connect to unix socket using the path name. |
6548fca4 MD |
93 | * |
94 | * Caller handles FD tracker. | |
67c5b804 | 95 | */ |
451d66b2 | 96 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
97 | { |
98 | struct sockaddr_un sun; | |
7bc53e94 | 99 | int fd, ret; |
67c5b804 | 100 | |
204d45df MD |
101 | /* |
102 | * libust threads require the close-on-exec flag for all | |
103 | * resources so it does not leak file descriptors upon exec. | |
6daf0c26 | 104 | * SOCK_CLOEXEC is not used since it is linux specific. |
204d45df | 105 | */ |
11ba4bcb | 106 | fd = socket(PF_UNIX, SOCK_STREAM, 0); |
67c5b804 | 107 | if (fd < 0) { |
32ce8569 | 108 | PERROR("socket"); |
7bc53e94 | 109 | ret = -errno; |
67c5b804 MD |
110 | goto error; |
111 | } | |
451d66b2 MD |
112 | if (timeout >= 0) { |
113 | /* Give at least 10ms. */ | |
114 | if (timeout < 10) | |
115 | timeout = 10; | |
116 | ret = ustcomm_setsockopt_snd_timeout(fd, timeout); | |
117 | if (ret < 0) { | |
118 | WARN("Error setting connect socket send timeout"); | |
119 | } | |
120 | } | |
11ba4bcb MD |
121 | ret = fcntl(fd, F_SETFD, FD_CLOEXEC); |
122 | if (ret < 0) { | |
32ce8569 | 123 | PERROR("fcntl"); |
7bc53e94 | 124 | ret = -errno; |
11ba4bcb MD |
125 | goto error_fcntl; |
126 | } | |
67c5b804 MD |
127 | |
128 | memset(&sun, 0, sizeof(sun)); | |
129 | sun.sun_family = AF_UNIX; | |
130 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
131 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
132 | ||
133 | ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
134 | if (ret < 0) { | |
135 | /* | |
0b9aa170 MD |
136 | * Don't print message on connect ENOENT error, because |
137 | * connect is used in normal execution to detect if | |
138 | * sessiond is alive. ENOENT is when the unix socket | |
139 | * file does not exist, and ECONNREFUSED is when the | |
140 | * file exists but no sessiond is listening. | |
67c5b804 | 141 | */ |
0b9aa170 | 142 | if (errno != ECONNREFUSED && errno != ECONNRESET |
bdd8ca83 | 143 | && errno != ENOENT && errno != EACCES) |
8cf811d3 | 144 | PERROR("connect"); |
7bc53e94 | 145 | ret = -errno; |
8cf811d3 MD |
146 | if (ret == -ECONNREFUSED || ret == -ECONNRESET) |
147 | ret = -EPIPE; | |
67c5b804 MD |
148 | goto error_connect; |
149 | } | |
150 | ||
151 | return fd; | |
152 | ||
153 | error_connect: | |
11ba4bcb | 154 | error_fcntl: |
7bc53e94 MD |
155 | { |
156 | int closeret; | |
157 | ||
158 | closeret = close(fd); | |
159 | if (closeret) | |
32ce8569 | 160 | PERROR("close"); |
7bc53e94 | 161 | } |
67c5b804 MD |
162 | error: |
163 | return ret; | |
164 | } | |
165 | ||
166 | /* | |
74d81a6c | 167 | * ustcomm_accept_unix_sock |
67c5b804 | 168 | * |
74d81a6c MD |
169 | * Do an accept(2) on the sock and return the |
170 | * new file descriptor. The socket MUST be bind(2) before. | |
67c5b804 | 171 | */ |
57773204 | 172 | int ustcomm_accept_unix_sock(int sock) |
67c5b804 MD |
173 | { |
174 | int new_fd; | |
175 | struct sockaddr_un sun; | |
176 | socklen_t len = 0; | |
177 | ||
178 | /* Blocking call */ | |
179 | new_fd = accept(sock, (struct sockaddr *) &sun, &len); | |
180 | if (new_fd < 0) { | |
b869b5ae MD |
181 | if (errno != ECONNABORTED) |
182 | PERROR("accept"); | |
183 | new_fd = -errno; | |
184 | if (new_fd == -ECONNABORTED) | |
185 | new_fd = -EPIPE; | |
67c5b804 | 186 | } |
67c5b804 | 187 | return new_fd; |
67c5b804 MD |
188 | } |
189 | ||
190 | /* | |
74d81a6c | 191 | * ustcomm_create_unix_sock |
67c5b804 | 192 | * |
74d81a6c MD |
193 | * Creates a AF_UNIX local socket using pathname |
194 | * bind the socket upon creation and return the fd. | |
67c5b804 | 195 | */ |
57773204 | 196 | int ustcomm_create_unix_sock(const char *pathname) |
67c5b804 MD |
197 | { |
198 | struct sockaddr_un sun; | |
7bc53e94 | 199 | int fd, ret; |
67c5b804 MD |
200 | |
201 | /* Create server socket */ | |
202 | if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) { | |
32ce8569 | 203 | PERROR("socket"); |
7bc53e94 | 204 | ret = -errno; |
67c5b804 MD |
205 | goto error; |
206 | } | |
207 | ||
208 | memset(&sun, 0, sizeof(sun)); | |
209 | sun.sun_family = AF_UNIX; | |
210 | strncpy(sun.sun_path, pathname, sizeof(sun.sun_path)); | |
211 | sun.sun_path[sizeof(sun.sun_path) - 1] = '\0'; | |
212 | ||
213 | /* Unlink the old file if present */ | |
214 | (void) unlink(pathname); | |
215 | ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun)); | |
216 | if (ret < 0) { | |
32ce8569 | 217 | PERROR("bind"); |
7bc53e94 MD |
218 | ret = -errno; |
219 | goto error_close; | |
67c5b804 MD |
220 | } |
221 | ||
222 | return fd; | |
223 | ||
7bc53e94 MD |
224 | error_close: |
225 | { | |
226 | int closeret; | |
227 | ||
228 | closeret = close(fd); | |
229 | if (closeret) { | |
32ce8569 | 230 | PERROR("close"); |
7bc53e94 MD |
231 | } |
232 | } | |
67c5b804 MD |
233 | error: |
234 | return ret; | |
235 | } | |
236 | ||
237 | /* | |
74d81a6c | 238 | * ustcomm_listen_unix_sock |
67c5b804 | 239 | * |
74d81a6c | 240 | * Make the socket listen using LTTNG_UST_COMM_MAX_LISTEN. |
67c5b804 | 241 | */ |
57773204 | 242 | int ustcomm_listen_unix_sock(int sock) |
67c5b804 MD |
243 | { |
244 | int ret; | |
245 | ||
e41474be | 246 | ret = listen(sock, LTTNG_UST_COMM_MAX_LISTEN); |
67c5b804 | 247 | if (ret < 0) { |
7bc53e94 | 248 | ret = -errno; |
32ce8569 | 249 | PERROR("listen"); |
67c5b804 MD |
250 | } |
251 | ||
252 | return ret; | |
253 | } | |
254 | ||
255 | /* | |
74d81a6c MD |
256 | * ustcomm_close_unix_sock |
257 | * | |
258 | * Shutdown cleanly a unix socket. | |
6548fca4 MD |
259 | * |
260 | * Handles fd tracker internally. | |
74d81a6c MD |
261 | */ |
262 | int ustcomm_close_unix_sock(int sock) | |
263 | { | |
264 | int ret; | |
265 | ||
6548fca4 | 266 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 267 | ret = close(sock); |
6548fca4 MD |
268 | if (!ret) { |
269 | lttng_ust_delete_fd_from_tracker(sock); | |
270 | } else { | |
32ce8569 | 271 | PERROR("close"); |
74d81a6c MD |
272 | ret = -errno; |
273 | } | |
6548fca4 | 274 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
275 | |
276 | return ret; | |
277 | } | |
278 | ||
279 | /* | |
280 | * ustcomm_recv_unix_sock | |
67c5b804 | 281 | * |
74d81a6c MD |
282 | * Receive data of size len in put that data into |
283 | * the buf param. Using recvmsg API. | |
284 | * Return the size of received data. | |
285 | * Return 0 on orderly shutdown. | |
67c5b804 | 286 | */ |
57773204 | 287 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 288 | { |
913b87f1 | 289 | struct msghdr msg; |
67c5b804 | 290 | struct iovec iov[1]; |
89c5b6ec MD |
291 | ssize_t ret = -1; |
292 | size_t len_last; | |
67c5b804 | 293 | |
913b87f1 MD |
294 | memset(&msg, 0, sizeof(msg)); |
295 | ||
67c5b804 MD |
296 | iov[0].iov_base = buf; |
297 | iov[0].iov_len = len; | |
298 | msg.msg_iov = iov; | |
299 | msg.msg_iovlen = 1; | |
300 | ||
7e3cfcbe | 301 | do { |
89c5b6ec | 302 | len_last = iov[0].iov_len; |
7e3cfcbe | 303 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
304 | if (ret > 0) { |
305 | iov[0].iov_base += ret; | |
306 | iov[0].iov_len -= ret; | |
307 | assert(ret <= len_last); | |
308 | } | |
309 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
310 | |
311 | if (ret < 0) { | |
312 | int shutret; | |
313 | ||
8cf811d3 | 314 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 315 | PERROR("recvmsg"); |
7bc53e94 | 316 | ret = -errno; |
8cf811d3 | 317 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 318 | ret = -EPIPE; |
7bc53e94 MD |
319 | |
320 | shutret = shutdown(sock, SHUT_RDWR); | |
321 | if (shutret) | |
32ce8569 | 322 | ERR("Socket shutdown error"); |
89c5b6ec MD |
323 | } else if (ret > 0) { |
324 | ret = len; | |
67c5b804 | 325 | } |
89c5b6ec | 326 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
327 | |
328 | return ret; | |
329 | } | |
330 | ||
331 | /* | |
74d81a6c | 332 | * ustcomm_send_unix_sock |
67c5b804 | 333 | * |
74d81a6c MD |
334 | * Send buf data of size len. Using sendmsg API. |
335 | * Return the size of sent data. | |
67c5b804 | 336 | */ |
32ce8569 | 337 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 338 | { |
913b87f1 | 339 | struct msghdr msg; |
67c5b804 | 340 | struct iovec iov[1]; |
7bc53e94 | 341 | ssize_t ret; |
67c5b804 | 342 | |
913b87f1 MD |
343 | memset(&msg, 0, sizeof(msg)); |
344 | ||
32ce8569 | 345 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
346 | iov[0].iov_len = len; |
347 | msg.msg_iov = iov; | |
348 | msg.msg_iovlen = 1; | |
349 | ||
1ea11eab MD |
350 | /* |
351 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
352 | * libust, so libust does not receive an unhandled SIGPIPE or | |
353 | * SIGURG. The sessiond receiver side can be made more resilient | |
354 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
355 | * libust side. | |
356 | */ | |
51d9d699 MD |
357 | do { |
358 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
359 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
360 | |
361 | if (ret < 0) { | |
362 | int shutret; | |
363 | ||
74d81a6c | 364 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 365 | PERROR("sendmsg"); |
7bc53e94 | 366 | ret = -errno; |
b869b5ae MD |
367 | if (ret == -ECONNRESET) |
368 | ret = -EPIPE; | |
7bc53e94 MD |
369 | |
370 | shutret = shutdown(sock, SHUT_RDWR); | |
371 | if (shutret) | |
32ce8569 | 372 | ERR("Socket shutdown error"); |
67c5b804 MD |
373 | } |
374 | ||
375 | return ret; | |
376 | } | |
377 | ||
378 | /* | |
74d81a6c | 379 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 380 | * |
74d81a6c | 381 | * Returns the size of data sent, or negative error value. |
67c5b804 | 382 | */ |
74d81a6c | 383 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 384 | { |
913b87f1 | 385 | struct msghdr msg; |
67c5b804 MD |
386 | struct cmsghdr *cmptr; |
387 | struct iovec iov[1]; | |
388 | ssize_t ret = -1; | |
389 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
390 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 391 | char dummy = 0; |
67c5b804 | 392 | |
913b87f1 | 393 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 394 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 395 | |
74d81a6c MD |
396 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
397 | return -EINVAL; | |
67c5b804 MD |
398 | |
399 | msg.msg_control = (caddr_t)tmp; | |
400 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
401 | ||
402 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
403 | if (!cmptr) |
404 | return -EINVAL; | |
67c5b804 MD |
405 | cmptr->cmsg_level = SOL_SOCKET; |
406 | cmptr->cmsg_type = SCM_RIGHTS; | |
407 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
408 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
409 | /* Sum of the length of all control messages in the buffer: */ | |
410 | msg.msg_controllen = cmptr->cmsg_len; | |
411 | ||
74d81a6c MD |
412 | iov[0].iov_base = &dummy; |
413 | iov[0].iov_len = 1; | |
67c5b804 MD |
414 | msg.msg_iov = iov; |
415 | msg.msg_iovlen = 1; | |
416 | ||
51d9d699 | 417 | do { |
0dafcd63 | 418 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 419 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 420 | if (ret < 0) { |
74d81a6c MD |
421 | /* |
422 | * We consider EPIPE and ECONNRESET as expected. | |
423 | */ | |
424 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 425 | PERROR("sendmsg"); |
74d81a6c | 426 | } |
b869b5ae MD |
427 | ret = -errno; |
428 | if (ret == -ECONNRESET) | |
429 | ret = -EPIPE; | |
74d81a6c MD |
430 | } |
431 | return ret; | |
432 | } | |
7bc53e94 | 433 | |
74d81a6c MD |
434 | /* |
435 | * Recv a message accompanied by fd(s) from a unix socket. | |
436 | * | |
74d81a6c MD |
437 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
438 | * actually received in nb_fd. | |
439 | * Returns -EPIPE on orderly shutdown. | |
440 | */ | |
441 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
442 | { | |
443 | struct iovec iov[1]; | |
444 | ssize_t ret = 0; | |
445 | struct cmsghdr *cmsg; | |
446 | size_t sizeof_fds = nb_fd * sizeof(int); | |
447 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
448 | struct msghdr msg; | |
449 | char dummy; | |
6daf0c26 | 450 | int i; |
7bc53e94 | 451 | |
74d81a6c | 452 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 453 | |
74d81a6c MD |
454 | /* Prepare to receive the structures */ |
455 | iov[0].iov_base = &dummy; | |
456 | iov[0].iov_len = 1; | |
457 | msg.msg_iov = iov; | |
458 | msg.msg_iovlen = 1; | |
459 | msg.msg_control = recv_fd; | |
460 | msg.msg_controllen = sizeof(recv_fd); | |
461 | ||
462 | do { | |
463 | ret = recvmsg(sock, &msg, 0); | |
464 | } while (ret < 0 && errno == EINTR); | |
465 | if (ret < 0) { | |
466 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 467 | PERROR("recvmsg fds"); |
74d81a6c | 468 | } |
8cf811d3 | 469 | ret = -errno; |
b869b5ae MD |
470 | if (ret == -ECONNRESET) |
471 | ret = -EPIPE; | |
74d81a6c MD |
472 | goto end; |
473 | } | |
474 | if (ret == 0) { | |
475 | /* orderly shutdown */ | |
476 | ret = -EPIPE; | |
477 | goto end; | |
478 | } | |
479 | if (ret != 1) { | |
32ce8569 | 480 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
481 | ret, 1); |
482 | goto end; | |
483 | } | |
484 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 485 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
486 | ret = -1; |
487 | goto end; | |
488 | } | |
489 | cmsg = CMSG_FIRSTHDR(&msg); | |
490 | if (!cmsg) { | |
32ce8569 | 491 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
492 | ret = -1; |
493 | goto end; | |
494 | } | |
495 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 496 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
497 | ret = -1; |
498 | goto end; | |
499 | } | |
500 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 501 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
502 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
503 | ret = -1; | |
504 | goto end; | |
505 | } | |
6daf0c26 | 506 | |
74d81a6c | 507 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); |
6daf0c26 JR |
508 | |
509 | /* Set FD_CLOEXEC */ | |
510 | for (i = 0; i < nb_fd; i++) { | |
511 | ret = fcntl(fds[i], F_SETFD, FD_CLOEXEC); | |
512 | if (ret < 0) { | |
513 | PERROR("fcntl failed to set FD_CLOEXEC on fd %d", | |
514 | fds[i]); | |
515 | } | |
516 | } | |
517 | ||
6b32a5c3 | 518 | ret = nb_fd; |
74d81a6c | 519 | end: |
67c5b804 MD |
520 | return ret; |
521 | } | |
57773204 MD |
522 | |
523 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
524 | { | |
525 | ssize_t len; | |
526 | ||
527 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
528 | switch (len) { | |
529 | case sizeof(*lum): | |
57773204 | 530 | break; |
57773204 | 531 | default: |
7bc53e94 | 532 | if (len < 0) { |
7bc53e94 MD |
533 | return len; |
534 | } else { | |
32ce8569 | 535 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
536 | return -EINVAL; |
537 | } | |
57773204 MD |
538 | } |
539 | return 0; | |
540 | } | |
541 | ||
542 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
543 | uint32_t expected_handle, uint32_t expected_cmd) | |
544 | { | |
545 | ssize_t len; | |
546 | ||
547 | memset(lur, 0, sizeof(*lur)); | |
548 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
549 | switch (len) { | |
550 | case 0: /* orderly shutdown */ | |
74d81a6c | 551 | return -EPIPE; |
57773204 | 552 | case sizeof(*lur): |
5dafeeaa MD |
553 | { |
554 | int err = 0; | |
555 | ||
57773204 | 556 | if (lur->handle != expected_handle) { |
32ce8569 | 557 | ERR("Unexpected result message handle: " |
74d81a6c MD |
558 | "expected: %u vs received: %u\n", |
559 | expected_handle, lur->handle); | |
5dafeeaa | 560 | err = 1; |
57773204 | 561 | } |
57773204 | 562 | if (lur->cmd != expected_cmd) { |
32ce8569 | 563 | ERR("Unexpected result message command " |
74d81a6c MD |
564 | "expected: %u vs received: %u\n", |
565 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
566 | err = 1; |
567 | } | |
568 | if (err) { | |
57773204 | 569 | return -EINVAL; |
5dafeeaa MD |
570 | } else { |
571 | return lur->ret_code; | |
57773204 | 572 | } |
5dafeeaa | 573 | } |
57773204 | 574 | default: |
8cf811d3 | 575 | if (len >= 0) { |
32ce8569 | 576 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 577 | } |
8cf811d3 | 578 | return len; |
57773204 MD |
579 | } |
580 | } | |
581 | ||
582 | int ustcomm_send_app_cmd(int sock, | |
583 | struct ustcomm_ust_msg *lum, | |
584 | struct ustcomm_ust_reply *lur) | |
585 | { | |
586 | int ret; | |
587 | ||
588 | ret = ustcomm_send_app_msg(sock, lum); | |
589 | if (ret) | |
590 | return ret; | |
c354a72c MD |
591 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
592 | if (ret > 0) | |
593 | return -EIO; | |
594 | return ret; | |
57773204 MD |
595 | } |
596 | ||
57773204 | 597 | /* |
74d81a6c MD |
598 | * chan_data is allocated internally if this function returns the |
599 | * expected var_len. | |
57773204 | 600 | */ |
74d81a6c | 601 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
602 | void **_chan_data, uint64_t var_len, |
603 | int *_wakeup_fd) | |
57773204 | 604 | { |
74d81a6c | 605 | void *chan_data; |
ff0f5728 | 606 | ssize_t len, nr_fd; |
f5c453e9 | 607 | int wakeup_fd, ret; |
57773204 | 608 | |
74d81a6c MD |
609 | if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) { |
610 | len = -EINVAL; | |
611 | goto error_check; | |
57773204 | 612 | } |
74d81a6c MD |
613 | /* Receive variable length data */ |
614 | chan_data = zmalloc(var_len); | |
615 | if (!chan_data) { | |
616 | len = -ENOMEM; | |
617 | goto error_alloc; | |
57773204 | 618 | } |
74d81a6c MD |
619 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
620 | if (len != var_len) { | |
621 | goto error_recv; | |
57773204 | 622 | } |
ff0f5728 | 623 | /* recv wakeup fd */ |
6548fca4 | 624 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
625 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
626 | if (nr_fd <= 0) { | |
6548fca4 | 627 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
628 | if (nr_fd < 0) { |
629 | len = nr_fd; | |
630 | goto error_recv; | |
631 | } else { | |
632 | len = -EIO; | |
633 | goto error_recv; | |
634 | } | |
635 | } | |
f5c453e9 JR |
636 | |
637 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
638 | if (ret < 0) { | |
f5c453e9 JR |
639 | ret = close(wakeup_fd); |
640 | if (ret) { | |
641 | PERROR("close on wakeup_fd"); | |
642 | } | |
643 | len = -EIO; | |
20d1999d | 644 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
645 | goto error_recv; |
646 | } | |
647 | ||
648 | *_wakeup_fd = ret; | |
6548fca4 | 649 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 650 | |
74d81a6c MD |
651 | *_chan_data = chan_data; |
652 | return len; | |
653 | ||
654 | error_recv: | |
655 | free(chan_data); | |
656 | error_alloc: | |
657 | error_check: | |
658 | return len; | |
659 | } | |
7bc53e94 | 660 | |
d8d2416d FD |
661 | ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock, |
662 | int *_event_notifier_notif_fd) | |
663 | { | |
664 | ssize_t nr_fd; | |
665 | int event_notifier_notif_fd, ret; | |
666 | ||
667 | /* Receive event_notifier notification fd */ | |
668 | lttng_ust_lock_fd_tracker(); | |
669 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &event_notifier_notif_fd, 1); | |
670 | if (nr_fd <= 0) { | |
671 | lttng_ust_unlock_fd_tracker(); | |
672 | if (nr_fd < 0) { | |
673 | ret = nr_fd; | |
674 | goto error; | |
675 | } else { | |
676 | ret = -EIO; | |
677 | goto error; | |
678 | } | |
679 | } | |
680 | ||
681 | ret = lttng_ust_add_fd_to_tracker(event_notifier_notif_fd); | |
682 | if (ret < 0) { | |
683 | ret = close(event_notifier_notif_fd); | |
684 | if (ret) { | |
685 | PERROR("close on event_notifier notif fd"); | |
686 | } | |
687 | ret = -EIO; | |
688 | lttng_ust_unlock_fd_tracker(); | |
689 | goto error; | |
690 | } | |
691 | ||
692 | *_event_notifier_notif_fd = ret; | |
693 | lttng_ust_unlock_fd_tracker(); | |
694 | ||
695 | ret = nr_fd; | |
696 | ||
697 | error: | |
698 | return ret; | |
699 | } | |
700 | ||
74d81a6c MD |
701 | int ustcomm_recv_stream_from_sessiond(int sock, |
702 | uint64_t *memory_map_size, | |
703 | int *shm_fd, int *wakeup_fd) | |
704 | { | |
705 | ssize_t len; | |
706 | int ret; | |
707 | int fds[2]; | |
708 | ||
709 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 710 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
711 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
712 | if (len <= 0) { | |
6548fca4 | 713 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
714 | if (len < 0) { |
715 | ret = len; | |
716 | goto error; | |
717 | } else { | |
718 | ret = -EIO; | |
719 | goto error; | |
720 | } | |
7bc53e94 | 721 | } |
f5c453e9 JR |
722 | |
723 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
724 | if (ret < 0) { | |
f5c453e9 JR |
725 | ret = close(fds[0]); |
726 | if (ret) { | |
727 | PERROR("close on received shm_fd"); | |
728 | } | |
729 | ret = -EIO; | |
20d1999d | 730 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
731 | goto error; |
732 | } | |
733 | *shm_fd = ret; | |
734 | ||
735 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
736 | if (ret < 0) { | |
f5c453e9 JR |
737 | ret = close(*shm_fd); |
738 | if (ret) { | |
739 | PERROR("close on shm_fd"); | |
740 | } | |
741 | *shm_fd = -1; | |
742 | ret = close(fds[1]); | |
743 | if (ret) { | |
744 | PERROR("close on received wakeup_fd"); | |
745 | } | |
746 | ret = -EIO; | |
20d1999d | 747 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
748 | goto error; |
749 | } | |
750 | *wakeup_fd = ret; | |
6548fca4 | 751 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
752 | return 0; |
753 | ||
754 | error: | |
57773204 MD |
755 | return ret; |
756 | } | |
32ce8569 | 757 | |
ebabbf58 MD |
758 | ssize_t ustcomm_recv_counter_from_sessiond(int sock, |
759 | void **_counter_data, uint64_t var_len) | |
760 | { | |
761 | void *counter_data; | |
762 | ssize_t len; | |
763 | ||
764 | if (var_len > LTTNG_UST_COUNTER_DATA_MAX_LEN) { | |
765 | len = -EINVAL; | |
766 | goto error_check; | |
767 | } | |
768 | /* Receive variable length data */ | |
769 | counter_data = zmalloc(var_len); | |
770 | if (!counter_data) { | |
771 | len = -ENOMEM; | |
772 | goto error_alloc; | |
773 | } | |
774 | len = ustcomm_recv_unix_sock(sock, counter_data, var_len); | |
775 | if (len != var_len) { | |
776 | goto error_recv; | |
777 | } | |
778 | *_counter_data = counter_data; | |
779 | return len; | |
780 | ||
781 | error_recv: | |
782 | free(counter_data); | |
783 | error_alloc: | |
784 | error_check: | |
785 | return len; | |
786 | } | |
787 | ||
788 | int ustcomm_recv_counter_shm_from_sessiond(int sock, | |
789 | int *shm_fd) | |
790 | { | |
791 | ssize_t len; | |
792 | int ret; | |
793 | int fds[1]; | |
794 | ||
795 | /* recv shm fd fd */ | |
796 | lttng_ust_lock_fd_tracker(); | |
797 | len = ustcomm_recv_fds_unix_sock(sock, fds, 1); | |
798 | if (len <= 0) { | |
799 | lttng_ust_unlock_fd_tracker(); | |
800 | if (len < 0) { | |
801 | ret = len; | |
802 | goto error; | |
803 | } else { | |
804 | ret = -EIO; | |
805 | goto error; | |
806 | } | |
807 | } | |
808 | ||
809 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
810 | if (ret < 0) { | |
811 | ret = close(fds[0]); | |
812 | if (ret) { | |
813 | PERROR("close on received shm_fd"); | |
814 | } | |
815 | ret = -EIO; | |
816 | lttng_ust_unlock_fd_tracker(); | |
817 | goto error; | |
818 | } | |
819 | *shm_fd = ret; | |
820 | lttng_ust_unlock_fd_tracker(); | |
821 | return 0; | |
822 | ||
823 | error: | |
824 | return ret; | |
825 | } | |
826 | ||
32ce8569 MD |
827 | /* |
828 | * Returns 0 on success, negative error value on error. | |
829 | */ | |
830 | int ustcomm_send_reg_msg(int sock, | |
831 | enum ustctl_socket_type type, | |
832 | uint32_t bits_per_long, | |
833 | uint32_t uint8_t_alignment, | |
834 | uint32_t uint16_t_alignment, | |
835 | uint32_t uint32_t_alignment, | |
836 | uint32_t uint64_t_alignment, | |
837 | uint32_t long_alignment) | |
838 | { | |
839 | ssize_t len; | |
840 | struct ustctl_reg_msg reg_msg; | |
841 | ||
842 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
843 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
844 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
845 | reg_msg.pid = getpid(); | |
846 | reg_msg.ppid = getppid(); | |
847 | reg_msg.uid = getuid(); | |
848 | reg_msg.gid = getgid(); | |
849 | reg_msg.bits_per_long = bits_per_long; | |
850 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
851 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
852 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
853 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
854 | reg_msg.long_alignment = long_alignment; | |
855 | reg_msg.socket_type = type; | |
0db3d6ee | 856 | lttng_pthread_getname_np(reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); |
32ce8569 MD |
857 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); |
858 | ||
859 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
860 | if (len > 0 && len != sizeof(reg_msg)) | |
861 | return -EIO; | |
862 | if (len < 0) | |
863 | return len; | |
864 | return 0; | |
865 | } | |
866 | ||
53569322 MD |
867 | static |
868 | ssize_t count_one_type(const struct lttng_type *lt) | |
869 | { | |
870 | switch (lt->atype) { | |
871 | case atype_integer: | |
872 | case atype_float: | |
873 | case atype_string: | |
874 | case atype_enum: | |
875 | case atype_array: | |
876 | case atype_sequence: | |
877 | return 1; | |
878 | case atype_struct: | |
218deb69 | 879 | return count_fields_recursive(lt->u.legacy._struct.nr_fields, |
cf22367f | 880 | lt->u.legacy._struct.fields) + 1; |
218deb69 MD |
881 | case atype_enum_nestable: |
882 | return count_one_type(lt->u.enum_nestable.container_type) + 1; | |
883 | case atype_array_nestable: | |
884 | return count_one_type(lt->u.array_nestable.elem_type) + 1; | |
885 | case atype_sequence_nestable: | |
886 | return count_one_type(lt->u.sequence_nestable.elem_type) + 1; | |
887 | case atype_struct_nestable: | |
888 | return count_fields_recursive(lt->u.struct_nestable.nr_fields, | |
cf22367f | 889 | lt->u.struct_nestable.fields) + 1; |
218deb69 | 890 | |
53569322 MD |
891 | case atype_dynamic: |
892 | { | |
893 | const struct lttng_event_field *choices; | |
894 | size_t nr_choices; | |
895 | int ret; | |
896 | ||
897 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
898 | &choices); | |
899 | if (ret) | |
900 | return ret; | |
901 | /* | |
cf22367f | 902 | * Two fields for enum, one field for variant, and |
53569322 MD |
903 | * one field per choice. |
904 | */ | |
cf22367f | 905 | return count_fields_recursive(nr_choices, choices) + 3; |
53569322 | 906 | } |
218deb69 | 907 | |
53569322 MD |
908 | default: |
909 | return -EINVAL; | |
910 | } | |
911 | return 0; | |
912 | } | |
913 | ||
914 | static | |
915 | ssize_t count_fields_recursive(size_t nr_fields, | |
916 | const struct lttng_event_field *lttng_fields) | |
917 | { | |
918 | int i; | |
919 | ssize_t ret, count = 0; | |
920 | ||
921 | for (i = 0; i < nr_fields; i++) { | |
922 | const struct lttng_event_field *lf; | |
923 | ||
924 | lf = <tng_fields[i]; | |
925 | /* skip 'nowrite' fields */ | |
926 | if (lf->nowrite) | |
927 | continue; | |
928 | ret = count_one_type(&lf->type); | |
929 | if (ret < 0) | |
930 | return ret; /* error */ | |
931 | count += ret; | |
932 | } | |
933 | return count; | |
934 | } | |
935 | ||
936 | static | |
937 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
938 | const struct lttng_ctx_field *lttng_fields) | |
939 | { | |
940 | int i; | |
941 | ssize_t ret, count = 0; | |
942 | ||
943 | for (i = 0; i < nr_fields; i++) { | |
944 | const struct lttng_event_field *lf; | |
945 | ||
946 | lf = <tng_fields[i].event_field; | |
947 | /* skip 'nowrite' fields */ | |
948 | if (lf->nowrite) | |
949 | continue; | |
950 | ret = count_one_type(&lf->type); | |
951 | if (ret < 0) | |
952 | return ret; /* error */ | |
953 | count += ret; | |
954 | } | |
955 | return count; | |
956 | } | |
957 | ||
7f2348b8 | 958 | static |
735ea6a8 | 959 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
960 | enum lttng_string_encodings le) |
961 | { | |
962 | switch (le) { | |
963 | case lttng_encode_none: | |
964 | *ue = ustctl_encode_none; | |
965 | break; | |
966 | case lttng_encode_UTF8: | |
967 | *ue = ustctl_encode_UTF8; | |
968 | break; | |
969 | case lttng_encode_ASCII: | |
970 | *ue = ustctl_encode_ASCII; | |
971 | break; | |
972 | default: | |
973 | return -EINVAL; | |
974 | } | |
975 | return 0; | |
976 | } | |
977 | ||
32ce8569 | 978 | static |
c785c634 MD |
979 | int serialize_integer_type(struct ustctl_integer_type *uit, |
980 | const struct lttng_integer_type *lit) | |
981 | { | |
973eac63 GAPG |
982 | int32_t encoding; |
983 | ||
c785c634 MD |
984 | uit->size = lit->size; |
985 | uit->signedness = lit->signedness; | |
986 | uit->reverse_byte_order = lit->reverse_byte_order; | |
987 | uit->base = lit->base; | |
973eac63 | 988 | if (serialize_string_encoding(&encoding, lit->encoding)) |
c785c634 | 989 | return -EINVAL; |
973eac63 | 990 | uit->encoding = encoding; |
c785c634 MD |
991 | uit->alignment = lit->alignment; |
992 | return 0; | |
993 | } | |
994 | ||
995 | static | |
996 | int serialize_basic_type(struct lttng_session *session, | |
997 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 998 | enum lttng_abstract_types atype, |
32ce8569 MD |
999 | union _ustctl_basic_type *ubt, |
1000 | const union _lttng_basic_type *lbt) | |
1001 | { | |
1002 | switch (atype) { | |
1003 | case atype_integer: | |
1004 | { | |
c785c634 | 1005 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 1006 | return -EINVAL; |
2b213b16 | 1007 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
1008 | break; |
1009 | } | |
1010 | case atype_string: | |
1011 | { | |
973eac63 GAPG |
1012 | int32_t encoding; |
1013 | ||
1014 | if (serialize_string_encoding(&encoding, lbt->string.encoding)) | |
7f2348b8 | 1015 | return -EINVAL; |
973eac63 | 1016 | ubt->string.encoding = encoding; |
2b213b16 | 1017 | *uatype = ustctl_atype_string; |
32ce8569 MD |
1018 | break; |
1019 | } | |
1020 | case atype_float: | |
1021 | { | |
1022 | struct ustctl_float_type *uft; | |
1023 | const struct lttng_float_type *lft; | |
1024 | ||
1025 | uft = &ubt->_float; | |
1026 | lft = &lbt->_float; | |
1027 | uft->exp_dig = lft->exp_dig; | |
1028 | uft->mant_dig = lft->mant_dig; | |
1029 | uft->alignment = lft->alignment; | |
1030 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 1031 | *uatype = ustctl_atype_float; |
32ce8569 MD |
1032 | break; |
1033 | } | |
1034 | case atype_enum: | |
c785c634 MD |
1035 | { |
1036 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
1037 | LTTNG_UST_SYM_NAME_LEN); | |
1038 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1039 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
1040 | &lbt->enumeration.container_type)) | |
1041 | return -EINVAL; | |
1042 | if (session) { | |
1043 | const struct lttng_enum *_enum; | |
1044 | ||
b33b46f7 | 1045 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
1046 | if (!_enum) |
1047 | return -EINVAL; | |
1048 | ubt->enumeration.id = _enum->id; | |
1049 | } else { | |
1050 | ubt->enumeration.id = -1ULL; | |
1051 | } | |
1052 | *uatype = ustctl_atype_enum; | |
1053 | break; | |
1054 | } | |
32ce8569 | 1055 | case atype_array: |
218deb69 | 1056 | case atype_array_nestable: |
32ce8569 | 1057 | case atype_sequence: |
218deb69 MD |
1058 | case atype_sequence_nestable: |
1059 | case atype_enum_nestable: | |
32ce8569 MD |
1060 | default: |
1061 | return -EINVAL; | |
1062 | } | |
1063 | return 0; | |
32ce8569 MD |
1064 | } |
1065 | ||
1066 | static | |
53569322 MD |
1067 | int serialize_dynamic_type(struct lttng_session *session, |
1068 | struct ustctl_field *fields, size_t *iter_output, | |
218deb69 | 1069 | const char *field_name) |
32ce8569 | 1070 | { |
53569322 MD |
1071 | const struct lttng_event_field *choices; |
1072 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
1073 | const struct lttng_type *tag_type; | |
1074 | const struct lttng_event_field *tag_field_generic; | |
1075 | struct lttng_event_field tag_field = { | |
1076 | .name = tag_field_name, | |
1077 | .nowrite = 0, | |
1078 | }; | |
1079 | struct ustctl_field *uf; | |
1080 | size_t nr_choices, i; | |
32ce8569 MD |
1081 | int ret; |
1082 | ||
53569322 MD |
1083 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
1084 | tag_type = &tag_field_generic->type; | |
1085 | ||
1086 | /* Serialize enum field. */ | |
218deb69 | 1087 | strncpy(tag_field_name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
1088 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1089 | strncat(tag_field_name, | |
1090 | "_tag", | |
1091 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
1092 | tag_field.type = *tag_type; | |
1093 | ret = serialize_one_field(session, fields, iter_output, | |
1094 | &tag_field); | |
1095 | if (ret) | |
1096 | return ret; | |
1097 | ||
1098 | /* Serialize variant field. */ | |
1099 | uf = &fields[*iter_output]; | |
1100 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
1101 | if (ret) | |
1102 | return ret; | |
1103 | ||
218deb69 | 1104 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
1105 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1106 | uf->type.atype = ustctl_atype_variant; | |
218deb69 MD |
1107 | uf->type.u.variant_nestable.nr_choices = nr_choices; |
1108 | strncpy(uf->type.u.variant_nestable.tag_name, | |
53569322 MD |
1109 | tag_field_name, |
1110 | LTTNG_UST_SYM_NAME_LEN); | |
218deb69 MD |
1111 | uf->type.u.variant_nestable.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1112 | uf->type.u.variant_nestable.alignment = 0; | |
53569322 MD |
1113 | (*iter_output)++; |
1114 | ||
1115 | /* Serialize choice fields after variant. */ | |
1116 | for (i = 0; i < nr_choices; i++) { | |
1117 | ret = serialize_one_field(session, fields, | |
1118 | iter_output, &choices[i]); | |
1119 | if (ret) | |
1120 | return ret; | |
1121 | } | |
1122 | return 0; | |
1123 | } | |
1124 | ||
1125 | static | |
218deb69 | 1126 | int serialize_one_type(struct lttng_session *session, |
53569322 | 1127 | struct ustctl_field *fields, size_t *iter_output, |
218deb69 | 1128 | const char *field_name, const struct lttng_type *lt) |
53569322 | 1129 | { |
53569322 MD |
1130 | int ret; |
1131 | ||
218deb69 MD |
1132 | /* |
1133 | * Serializing a type (rather than a field) generates a ustctl_field | |
1134 | * entry with 0-length name. | |
1135 | */ | |
53569322 | 1136 | |
32ce8569 MD |
1137 | switch (lt->atype) { |
1138 | case atype_integer: | |
1139 | case atype_float: | |
1140 | case atype_string: | |
c785c634 | 1141 | case atype_enum: |
53569322 MD |
1142 | { |
1143 | struct ustctl_field *uf = &fields[*iter_output]; | |
1144 | struct ustctl_type *ut = &uf->type; | |
973eac63 | 1145 | enum ustctl_abstract_types atype; |
53569322 | 1146 | |
218deb69 MD |
1147 | if (field_name) { |
1148 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1149 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1150 | } else { | |
1151 | uf->name[0] = '\0'; | |
1152 | } | |
973eac63 | 1153 | ret = serialize_basic_type(session, &atype, lt->atype, |
218deb69 | 1154 | &ut->u.legacy.basic, <->u.legacy.basic); |
32ce8569 MD |
1155 | if (ret) |
1156 | return ret; | |
973eac63 | 1157 | ut->atype = atype; |
53569322 | 1158 | (*iter_output)++; |
32ce8569 | 1159 | break; |
53569322 | 1160 | } |
32ce8569 MD |
1161 | case atype_array: |
1162 | { | |
53569322 MD |
1163 | struct ustctl_field *uf = &fields[*iter_output]; |
1164 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1165 | struct ustctl_basic_type *ubt; |
1166 | const struct lttng_basic_type *lbt; | |
973eac63 | 1167 | enum ustctl_abstract_types atype; |
32ce8569 | 1168 | |
218deb69 MD |
1169 | if (field_name) { |
1170 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1171 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1172 | } else { | |
1173 | uf->name[0] = '\0'; | |
1174 | } | |
1175 | ut->atype = ustctl_atype_array; | |
1176 | ubt = &ut->u.legacy.array.elem_type; | |
1177 | lbt = <->u.legacy.array.elem_type; | |
1178 | ut->u.legacy.array.length = lt->u.legacy.array.length; | |
973eac63 | 1179 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1180 | &ubt->u.basic, &lbt->u.basic); |
1181 | if (ret) | |
1182 | return -EINVAL; | |
973eac63 | 1183 | ubt->atype = atype; |
53569322 | 1184 | (*iter_output)++; |
32ce8569 MD |
1185 | break; |
1186 | } | |
218deb69 MD |
1187 | case atype_array_nestable: |
1188 | { | |
1189 | struct ustctl_field *uf = &fields[*iter_output]; | |
1190 | struct ustctl_type *ut = &uf->type; | |
1191 | ||
1192 | if (field_name) { | |
1193 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1194 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1195 | } else { | |
1196 | uf->name[0] = '\0'; | |
1197 | } | |
1198 | ut->atype = ustctl_atype_array_nestable; | |
1199 | ut->u.array_nestable.length = lt->u.array_nestable.length; | |
1200 | ut->u.array_nestable.alignment = lt->u.array_nestable.alignment; | |
1201 | (*iter_output)++; | |
1202 | ||
1203 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1204 | lt->u.array_nestable.elem_type); | |
1205 | if (ret) | |
1206 | return -EINVAL; | |
1207 | break; | |
1208 | } | |
32ce8569 MD |
1209 | case atype_sequence: |
1210 | { | |
53569322 MD |
1211 | struct ustctl_field *uf = &fields[*iter_output]; |
1212 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1213 | struct ustctl_basic_type *ubt; |
1214 | const struct lttng_basic_type *lbt; | |
973eac63 | 1215 | enum ustctl_abstract_types atype; |
32ce8569 | 1216 | |
218deb69 MD |
1217 | if (field_name) { |
1218 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1219 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1220 | } else { | |
1221 | uf->name[0] = '\0'; | |
1222 | } | |
53569322 | 1223 | uf->type.atype = ustctl_atype_sequence; |
218deb69 MD |
1224 | ubt = &ut->u.legacy.sequence.length_type; |
1225 | lbt = <->u.legacy.sequence.length_type; | |
973eac63 | 1226 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1227 | &ubt->u.basic, &lbt->u.basic); |
1228 | if (ret) | |
1229 | return -EINVAL; | |
973eac63 | 1230 | ubt->atype = atype; |
218deb69 MD |
1231 | ubt = &ut->u.legacy.sequence.elem_type; |
1232 | lbt = <->u.legacy.sequence.elem_type; | |
973eac63 | 1233 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1234 | &ubt->u.basic, &lbt->u.basic); |
1235 | if (ret) | |
1236 | return -EINVAL; | |
973eac63 | 1237 | ubt->atype = atype; |
53569322 MD |
1238 | (*iter_output)++; |
1239 | break; | |
1240 | } | |
218deb69 MD |
1241 | case atype_sequence_nestable: |
1242 | { | |
1243 | struct ustctl_field *uf = &fields[*iter_output]; | |
1244 | struct ustctl_type *ut = &uf->type; | |
1245 | ||
1246 | if (field_name) { | |
1247 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1248 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1249 | } else { | |
1250 | uf->name[0] = '\0'; | |
1251 | } | |
1252 | ut->atype = ustctl_atype_sequence_nestable; | |
1253 | strncpy(ut->u.sequence_nestable.length_name, | |
1254 | lt->u.sequence_nestable.length_name, | |
1255 | LTTNG_UST_SYM_NAME_LEN); | |
1256 | ut->u.sequence_nestable.length_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1257 | ut->u.sequence_nestable.alignment = lt->u.sequence_nestable.alignment; | |
1258 | (*iter_output)++; | |
1259 | ||
1260 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1261 | lt->u.sequence_nestable.elem_type); | |
1262 | if (ret) | |
1263 | return -EINVAL; | |
1264 | break; | |
1265 | } | |
53569322 MD |
1266 | case atype_dynamic: |
1267 | { | |
218deb69 MD |
1268 | ret = serialize_dynamic_type(session, fields, iter_output, |
1269 | field_name); | |
53569322 MD |
1270 | if (ret) |
1271 | return -EINVAL; | |
1272 | break; | |
1273 | } | |
1274 | case atype_struct: | |
1275 | { | |
1276 | struct ustctl_field *uf = &fields[*iter_output]; | |
1277 | ||
218deb69 MD |
1278 | if (field_name) { |
1279 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1280 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1281 | } else { | |
1282 | uf->name[0] = '\0'; | |
53569322 | 1283 | } |
53569322 | 1284 | uf->type.atype = ustctl_atype_struct; |
218deb69 | 1285 | uf->type.u.legacy._struct.nr_fields = lt->u.legacy._struct.nr_fields; |
53569322 | 1286 | (*iter_output)++; |
218deb69 MD |
1287 | |
1288 | ret = serialize_fields(session, fields, iter_output, | |
1289 | lt->u.legacy._struct.nr_fields, | |
1290 | lt->u.legacy._struct.fields); | |
1291 | if (ret) | |
1292 | return -EINVAL; | |
1293 | break; | |
1294 | } | |
1295 | case atype_struct_nestable: | |
1296 | { | |
1297 | struct ustctl_field *uf = &fields[*iter_output]; | |
1298 | ||
1299 | if (field_name) { | |
1300 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1301 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1302 | } else { | |
1303 | uf->name[0] = '\0'; | |
1304 | } | |
1305 | uf->type.atype = ustctl_atype_struct_nestable; | |
1306 | uf->type.u.struct_nestable.nr_fields = lt->u.struct_nestable.nr_fields; | |
1307 | uf->type.u.struct_nestable.alignment = lt->u.struct_nestable.alignment; | |
1308 | (*iter_output)++; | |
1309 | ||
1310 | ret = serialize_fields(session, fields, iter_output, | |
1311 | lt->u.struct_nestable.nr_fields, | |
1312 | lt->u.struct_nestable.fields); | |
1313 | if (ret) | |
1314 | return -EINVAL; | |
1315 | break; | |
1316 | } | |
1317 | case atype_enum_nestable: | |
1318 | { | |
1319 | struct ustctl_field *uf = &fields[*iter_output]; | |
1320 | struct ustctl_type *ut = &uf->type; | |
1321 | ||
1322 | if (field_name) { | |
1323 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1324 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1325 | } else { | |
1326 | uf->name[0] = '\0'; | |
1327 | } | |
1328 | strncpy(ut->u.enum_nestable.name, lt->u.enum_nestable.desc->name, | |
1329 | LTTNG_UST_SYM_NAME_LEN); | |
1330 | ut->u.enum_nestable.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1331 | ut->atype = ustctl_atype_enum_nestable; | |
1332 | (*iter_output)++; | |
1333 | ||
1334 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1335 | lt->u.enum_nestable.container_type); | |
1336 | if (ret) | |
1337 | return -EINVAL; | |
1338 | if (session) { | |
1339 | const struct lttng_enum *_enum; | |
1340 | ||
1341 | _enum = lttng_ust_enum_get_from_desc(session, lt->u.enum_nestable.desc); | |
1342 | if (!_enum) | |
1343 | return -EINVAL; | |
1344 | ut->u.enum_nestable.id = _enum->id; | |
1345 | } else { | |
1346 | ut->u.enum_nestable.id = -1ULL; | |
1347 | } | |
32ce8569 MD |
1348 | break; |
1349 | } | |
32ce8569 MD |
1350 | default: |
1351 | return -EINVAL; | |
1352 | } | |
1353 | return 0; | |
1354 | } | |
1355 | ||
218deb69 MD |
1356 | static |
1357 | int serialize_one_field(struct lttng_session *session, | |
1358 | struct ustctl_field *fields, size_t *iter_output, | |
1359 | const struct lttng_event_field *lf) | |
1360 | { | |
1361 | /* skip 'nowrite' fields */ | |
1362 | if (lf->nowrite) | |
1363 | return 0; | |
1364 | ||
1365 | return serialize_one_type(session, fields, iter_output, lf->name, &lf->type); | |
1366 | } | |
1367 | ||
32ce8569 | 1368 | static |
c785c634 | 1369 | int serialize_fields(struct lttng_session *session, |
218deb69 MD |
1370 | struct ustctl_field *ustctl_fields, |
1371 | size_t *iter_output, size_t nr_lttng_fields, | |
1372 | const struct lttng_event_field *lttng_fields) | |
1373 | { | |
1374 | int ret; | |
1375 | size_t i; | |
1376 | ||
1377 | for (i = 0; i < nr_lttng_fields; i++) { | |
1378 | ret = serialize_one_field(session, ustctl_fields, | |
1379 | iter_output, <tng_fields[i]); | |
1380 | if (ret) | |
1381 | return ret; | |
1382 | } | |
1383 | return 0; | |
1384 | } | |
1385 | ||
1386 | static | |
1387 | int alloc_serialize_fields(struct lttng_session *session, | |
c785c634 | 1388 | size_t *_nr_write_fields, |
32ce8569 MD |
1389 | struct ustctl_field **ustctl_fields, |
1390 | size_t nr_fields, | |
1391 | const struct lttng_event_field *lttng_fields) | |
1392 | { | |
1393 | struct ustctl_field *fields; | |
53569322 | 1394 | int ret; |
218deb69 | 1395 | size_t iter_output = 0; |
53569322 MD |
1396 | ssize_t nr_write_fields; |
1397 | ||
1398 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1399 | if (nr_write_fields < 0) { | |
1400 | return (int) nr_write_fields; | |
1401 | } | |
32ce8569 | 1402 | |
53569322 | 1403 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1404 | if (!fields) |
1405 | return -ENOMEM; | |
1406 | ||
218deb69 MD |
1407 | ret = serialize_fields(session, fields, &iter_output, nr_fields, |
1408 | lttng_fields); | |
1409 | if (ret) | |
1410 | goto error_type; | |
32ce8569 MD |
1411 | |
1412 | *_nr_write_fields = nr_write_fields; | |
1413 | *ustctl_fields = fields; | |
1414 | return 0; | |
1415 | ||
1416 | error_type: | |
1417 | free(fields); | |
1418 | return ret; | |
1419 | } | |
1420 | ||
c785c634 MD |
1421 | static |
1422 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1423 | size_t nr_entries, | |
1424 | const struct lttng_enum_entry *lttng_entries) | |
1425 | { | |
1426 | struct ustctl_enum_entry *entries; | |
1427 | int i; | |
1428 | ||
1429 | /* Serialize the entries */ | |
1430 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1431 | if (!entries) | |
1432 | return -ENOMEM; | |
1433 | for (i = 0; i < nr_entries; i++) { | |
1434 | struct ustctl_enum_entry *uentry; | |
1435 | const struct lttng_enum_entry *lentry; | |
1436 | ||
1437 | uentry = &entries[i]; | |
1438 | lentry = <tng_entries[i]; | |
1439 | ||
a6f80644 MD |
1440 | uentry->start.value = lentry->start.value; |
1441 | uentry->start.signedness = lentry->start.signedness; | |
1442 | uentry->end.value = lentry->end.value; | |
1443 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1444 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1445 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1446 | |
1447 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1448 | uentry->u.extra.options |= | |
1449 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1450 | } | |
c785c634 MD |
1451 | } |
1452 | *_entries = entries; | |
1453 | return 0; | |
1454 | } | |
1455 | ||
83e43212 | 1456 | static |
53569322 MD |
1457 | int serialize_ctx_fields(struct lttng_session *session, |
1458 | size_t *_nr_write_fields, | |
83e43212 MD |
1459 | struct ustctl_field **ustctl_fields, |
1460 | size_t nr_fields, | |
1461 | const struct lttng_ctx_field *lttng_fields) | |
1462 | { | |
1463 | struct ustctl_field *fields; | |
53569322 MD |
1464 | int ret; |
1465 | size_t i, iter_output = 0; | |
1466 | ssize_t nr_write_fields; | |
83e43212 | 1467 | |
53569322 MD |
1468 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1469 | lttng_fields); | |
1470 | if (nr_write_fields < 0) { | |
1471 | return (int) nr_write_fields; | |
1472 | } | |
1473 | ||
1474 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1475 | if (!fields) |
1476 | return -ENOMEM; | |
1477 | ||
1478 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1479 | ret = serialize_one_field(session, fields, &iter_output, |
1480 | <tng_fields[i].event_field); | |
83e43212 MD |
1481 | if (ret) |
1482 | goto error_type; | |
83e43212 MD |
1483 | } |
1484 | ||
1485 | *_nr_write_fields = nr_write_fields; | |
1486 | *ustctl_fields = fields; | |
1487 | return 0; | |
1488 | ||
1489 | error_type: | |
1490 | free(fields); | |
1491 | return ret; | |
1492 | } | |
1493 | ||
32ce8569 MD |
1494 | /* |
1495 | * Returns 0 on success, negative error value on error. | |
1496 | */ | |
1497 | int ustcomm_register_event(int sock, | |
c785c634 | 1498 | struct lttng_session *session, |
32ce8569 MD |
1499 | int session_objd, /* session descriptor */ |
1500 | int channel_objd, /* channel descriptor */ | |
1501 | const char *event_name, /* event name (input) */ | |
1502 | int loglevel, | |
1503 | const char *signature, /* event signature (input) */ | |
1504 | size_t nr_fields, /* fields */ | |
1505 | const struct lttng_event_field *lttng_fields, | |
1506 | const char *model_emf_uri, | |
1507 | uint32_t *id) /* event id (output) */ | |
1508 | { | |
1509 | ssize_t len; | |
1510 | struct { | |
1511 | struct ustcomm_notify_hdr header; | |
1512 | struct ustcomm_notify_event_msg m; | |
1513 | } msg; | |
1514 | struct { | |
1515 | struct ustcomm_notify_hdr header; | |
1516 | struct ustcomm_notify_event_reply r; | |
1517 | } reply; | |
1518 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1519 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1520 | size_t nr_write_fields = 0; |
1521 | int ret; | |
1522 | ||
1523 | memset(&msg, 0, sizeof(msg)); | |
1524 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1525 | msg.m.session_objd = session_objd; | |
1526 | msg.m.channel_objd = channel_objd; | |
1527 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1528 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1529 | msg.m.loglevel = loglevel; | |
1530 | signature_len = strlen(signature) + 1; | |
1531 | msg.m.signature_len = signature_len; | |
1532 | ||
1533 | /* Calculate fields len, serialize fields. */ | |
1534 | if (nr_fields > 0) { | |
218deb69 | 1535 | ret = alloc_serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1536 | nr_fields, lttng_fields); |
1537 | if (ret) | |
1538 | return ret; | |
1539 | } | |
1540 | ||
1541 | fields_len = sizeof(*fields) * nr_write_fields; | |
1542 | msg.m.fields_len = fields_len; | |
1543 | if (model_emf_uri) { | |
1544 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1545 | } else { | |
1546 | model_emf_uri_len = 0; | |
1547 | } | |
1548 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1549 | |
32ce8569 MD |
1550 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1551 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1552 | ret = -EIO; |
1553 | goto error_fields; | |
32ce8569 MD |
1554 | } |
1555 | if (len < 0) { | |
c785c634 MD |
1556 | ret = len; |
1557 | goto error_fields; | |
32ce8569 MD |
1558 | } |
1559 | ||
1560 | /* send signature */ | |
1561 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1562 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1563 | ret = -EIO; |
1564 | goto error_fields; | |
32ce8569 MD |
1565 | } |
1566 | if (len < 0) { | |
6b95617c MD |
1567 | ret = len; |
1568 | goto error_fields; | |
32ce8569 MD |
1569 | } |
1570 | ||
1571 | /* send fields */ | |
1572 | if (fields_len > 0) { | |
1573 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1574 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1575 | ret = -EIO; |
1576 | goto error_fields; | |
32ce8569 MD |
1577 | } |
1578 | if (len < 0) { | |
c785c634 MD |
1579 | ret = len; |
1580 | goto error_fields; | |
32ce8569 MD |
1581 | } |
1582 | } | |
6b95617c | 1583 | free(fields); |
32ce8569 MD |
1584 | |
1585 | if (model_emf_uri_len) { | |
1586 | /* send model_emf_uri */ | |
1587 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1588 | model_emf_uri_len); | |
c785c634 | 1589 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1590 | return -EIO; |
c785c634 MD |
1591 | } |
1592 | if (len < 0) { | |
6b95617c | 1593 | return len; |
c785c634 | 1594 | } |
32ce8569 MD |
1595 | } |
1596 | ||
1597 | /* receive reply */ | |
1598 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1599 | switch (len) { | |
1600 | case 0: /* orderly shutdown */ | |
1601 | return -EPIPE; | |
1602 | case sizeof(reply): | |
1603 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1604 | ERR("Unexpected result message command " | |
1605 | "expected: %u vs received: %u\n", | |
1606 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1607 | return -EINVAL; | |
1608 | } | |
1609 | if (reply.r.ret_code > 0) | |
1610 | return -EINVAL; | |
1611 | if (reply.r.ret_code < 0) | |
1612 | return reply.r.ret_code; | |
1613 | *id = reply.r.event_id; | |
1614 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1615 | event_name, reply.r.ret_code, reply.r.event_id); | |
1616 | return 0; | |
1617 | default: | |
1618 | if (len < 0) { | |
1619 | /* Transport level error */ | |
1620 | if (errno == EPIPE || errno == ECONNRESET) | |
1621 | len = -errno; | |
1622 | return len; | |
1623 | } else { | |
1624 | ERR("incorrect message size: %zd\n", len); | |
1625 | return len; | |
1626 | } | |
1627 | } | |
6b95617c | 1628 | /* Unreached. */ |
c785c634 | 1629 | |
6b95617c | 1630 | /* Error path only. */ |
c785c634 MD |
1631 | error_fields: |
1632 | free(fields); | |
1633 | return ret; | |
1634 | } | |
1635 | ||
1636 | /* | |
1637 | * Returns 0 on success, negative error value on error. | |
1638 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1639 | */ | |
1640 | int ustcomm_register_enum(int sock, | |
1641 | int session_objd, /* session descriptor */ | |
1642 | const char *enum_name, /* enum name (input) */ | |
1643 | size_t nr_entries, /* entries */ | |
1644 | const struct lttng_enum_entry *lttng_entries, | |
1645 | uint64_t *id) | |
1646 | { | |
1647 | ssize_t len; | |
1648 | struct { | |
1649 | struct ustcomm_notify_hdr header; | |
1650 | struct ustcomm_notify_enum_msg m; | |
1651 | } msg; | |
1652 | struct { | |
1653 | struct ustcomm_notify_hdr header; | |
1654 | struct ustcomm_notify_enum_reply r; | |
1655 | } reply; | |
1656 | size_t entries_len; | |
1657 | struct ustctl_enum_entry *entries = NULL; | |
1658 | int ret; | |
1659 | ||
1660 | memset(&msg, 0, sizeof(msg)); | |
1661 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1662 | msg.m.session_objd = session_objd; | |
1663 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1664 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1665 | ||
1666 | /* Calculate entries len, serialize entries. */ | |
1667 | if (nr_entries > 0) { | |
1668 | ret = serialize_entries(&entries, | |
1669 | nr_entries, lttng_entries); | |
1670 | if (ret) | |
1671 | return ret; | |
1672 | } | |
1673 | ||
1674 | entries_len = sizeof(*entries) * nr_entries; | |
1675 | msg.m.entries_len = entries_len; | |
1676 | ||
1677 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1678 | if (len > 0 && len != sizeof(msg)) { | |
1679 | ret = -EIO; | |
1680 | goto error_entries; | |
1681 | } | |
1682 | if (len < 0) { | |
1683 | ret = len; | |
1684 | goto error_entries; | |
1685 | } | |
1686 | ||
1687 | /* send entries */ | |
1688 | if (entries_len > 0) { | |
1689 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1690 | if (len > 0 && len != entries_len) { | |
1691 | ret = -EIO; | |
1692 | goto error_entries; | |
1693 | } | |
1694 | if (len < 0) { | |
1695 | ret = len; | |
1696 | goto error_entries; | |
1697 | } | |
1698 | } | |
1699 | free(entries); | |
1700 | entries = NULL; | |
1701 | ||
1702 | /* receive reply */ | |
1703 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1704 | switch (len) { | |
1705 | case 0: /* orderly shutdown */ | |
1706 | return -EPIPE; | |
1707 | case sizeof(reply): | |
1708 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1709 | ERR("Unexpected result message command " | |
1710 | "expected: %u vs received: %u\n", | |
1711 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1712 | return -EINVAL; | |
1713 | } | |
1714 | if (reply.r.ret_code > 0) | |
1715 | return -EINVAL; | |
1716 | if (reply.r.ret_code < 0) | |
1717 | return reply.r.ret_code; | |
1718 | *id = reply.r.enum_id; | |
1719 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1720 | enum_name, reply.r.ret_code); | |
1721 | return 0; | |
1722 | default: | |
1723 | if (len < 0) { | |
1724 | /* Transport level error */ | |
1725 | if (errno == EPIPE || errno == ECONNRESET) | |
1726 | len = -errno; | |
1727 | return len; | |
1728 | } else { | |
1729 | ERR("incorrect message size: %zd\n", len); | |
1730 | return len; | |
1731 | } | |
1732 | } | |
1733 | return ret; | |
1734 | ||
1735 | error_entries: | |
1736 | free(entries); | |
1737 | return ret; | |
32ce8569 MD |
1738 | } |
1739 | ||
1740 | /* | |
1741 | * Returns 0 on success, negative error value on error. | |
1742 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1743 | */ | |
1744 | int ustcomm_register_channel(int sock, | |
53569322 | 1745 | struct lttng_session *session, |
32ce8569 MD |
1746 | int session_objd, /* session descriptor */ |
1747 | int channel_objd, /* channel descriptor */ | |
1748 | size_t nr_ctx_fields, | |
83e43212 | 1749 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1750 | uint32_t *chan_id, /* channel id (output) */ |
1751 | int *header_type) /* header type (output) */ | |
1752 | { | |
1753 | ssize_t len; | |
1754 | struct { | |
1755 | struct ustcomm_notify_hdr header; | |
1756 | struct ustcomm_notify_channel_msg m; | |
1757 | } msg; | |
1758 | struct { | |
1759 | struct ustcomm_notify_hdr header; | |
1760 | struct ustcomm_notify_channel_reply r; | |
1761 | } reply; | |
1762 | size_t fields_len; | |
83e43212 | 1763 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1764 | int ret; |
1765 | size_t nr_write_fields = 0; | |
1766 | ||
1767 | memset(&msg, 0, sizeof(msg)); | |
1768 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1769 | msg.m.session_objd = session_objd; | |
1770 | msg.m.channel_objd = channel_objd; | |
1771 | ||
1772 | /* Calculate fields len, serialize fields. */ | |
1773 | if (nr_ctx_fields > 0) { | |
53569322 | 1774 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1775 | nr_ctx_fields, ctx_fields); |
1776 | if (ret) | |
1777 | return ret; | |
1778 | } | |
1779 | ||
1780 | fields_len = sizeof(*fields) * nr_write_fields; | |
1781 | msg.m.ctx_fields_len = fields_len; | |
1782 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1783 | if (len > 0 && len != sizeof(msg)) { | |
1784 | free(fields); | |
1785 | return -EIO; | |
1786 | } | |
1787 | if (len < 0) { | |
1788 | free(fields); | |
1789 | return len; | |
1790 | } | |
1791 | ||
1792 | /* send fields */ | |
1793 | if (fields_len > 0) { | |
1794 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1795 | free(fields); | |
1796 | if (len > 0 && len != fields_len) { | |
1797 | return -EIO; | |
1798 | } | |
1799 | if (len < 0) { | |
1800 | return len; | |
1801 | } | |
17ea789c MD |
1802 | } else { |
1803 | free(fields); | |
32ce8569 MD |
1804 | } |
1805 | ||
1806 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1807 | switch (len) { | |
1808 | case 0: /* orderly shutdown */ | |
1809 | return -EPIPE; | |
1810 | case sizeof(reply): | |
1811 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1812 | ERR("Unexpected result message command " | |
1813 | "expected: %u vs received: %u\n", | |
1814 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1815 | return -EINVAL; | |
1816 | } | |
1817 | if (reply.r.ret_code > 0) | |
1818 | return -EINVAL; | |
1819 | if (reply.r.ret_code < 0) | |
1820 | return reply.r.ret_code; | |
1821 | *chan_id = reply.r.chan_id; | |
1822 | switch (reply.r.header_type) { | |
1823 | case 1: | |
1824 | case 2: | |
1825 | *header_type = reply.r.header_type; | |
1826 | break; | |
1827 | default: | |
1828 | ERR("Unexpected channel header type %u\n", | |
1829 | reply.r.header_type); | |
1830 | return -EINVAL; | |
1831 | } | |
1832 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1833 | reply.r.chan_id, reply.r.header_type); | |
1834 | return 0; | |
1835 | default: | |
1836 | if (len < 0) { | |
1837 | /* Transport level error */ | |
1838 | if (errno == EPIPE || errno == ECONNRESET) | |
1839 | len = -errno; | |
1840 | return len; | |
1841 | } else { | |
1842 | ERR("incorrect message size: %zd\n", len); | |
1843 | return len; | |
1844 | } | |
1845 | } | |
1846 | } | |
ff517991 MD |
1847 | |
1848 | /* | |
1849 | * Set socket reciving timeout. | |
1850 | */ | |
1851 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1852 | { | |
1853 | int ret; | |
1854 | struct timeval tv; | |
1855 | ||
1856 | tv.tv_sec = msec / 1000; | |
1857 | tv.tv_usec = (msec * 1000 % 1000000); | |
1858 | ||
1859 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1860 | if (ret < 0) { | |
1861 | PERROR("setsockopt SO_RCVTIMEO"); | |
1862 | ret = -errno; | |
1863 | } | |
1864 | ||
1865 | return ret; | |
1866 | } | |
1867 | ||
1868 | /* | |
1869 | * Set socket sending timeout. | |
1870 | */ | |
1871 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1872 | { | |
1873 | int ret; | |
1874 | struct timeval tv; | |
1875 | ||
1876 | tv.tv_sec = msec / 1000; | |
1877 | tv.tv_usec = (msec * 1000) % 1000000; | |
1878 | ||
1879 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1880 | if (ret < 0) { | |
1881 | PERROR("setsockopt SO_SNDTIMEO"); | |
1882 | ret = -errno; | |
1883 | } | |
1884 | ||
1885 | return ret; | |
1886 | } |