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> |
bb84a1ec | 21 | #include <inttypes.h> |
67c5b804 | 22 | |
32ce8569 | 23 | #include <lttng/ust-ctl.h> |
b728d87e | 24 | #include <ust-comm.h> |
6548fca4 | 25 | #include <ust-fd.h> |
74d81a6c | 26 | #include <helper.h> |
7bc53e94 | 27 | #include <lttng/ust-error.h> |
32ce8569 | 28 | #include <lttng/ust-events.h> |
53569322 | 29 | #include <lttng/ust-dynamic-type.h> |
32ce8569 MD |
30 | #include <usterr-signal-safe.h> |
31 | ||
32 | #include "../liblttng-ust/compat.h" | |
7bc53e94 MD |
33 | |
34 | #define USTCOMM_CODE_OFFSET(code) \ | |
35 | (code == LTTNG_UST_OK ? 0 : (code - LTTNG_UST_ERR + 1)) | |
67c5b804 | 36 | |
74d81a6c MD |
37 | #define USTCOMM_MAX_SEND_FDS 4 |
38 | ||
53569322 MD |
39 | static |
40 | ssize_t count_fields_recursive(size_t nr_fields, | |
41 | const struct lttng_event_field *lttng_fields); | |
42 | static | |
43 | int serialize_one_field(struct lttng_session *session, | |
44 | struct ustctl_field *fields, size_t *iter_output, | |
45 | const struct lttng_event_field *lf); | |
218deb69 MD |
46 | static |
47 | int serialize_fields(struct lttng_session *session, | |
48 | struct ustctl_field *ustctl_fields, | |
49 | size_t *iter_output, size_t nr_lttng_fields, | |
50 | const struct lttng_event_field *lttng_fields); | |
53569322 | 51 | |
67c5b804 MD |
52 | /* |
53 | * Human readable error message. | |
54 | */ | |
57773204 | 55 | static const char *ustcomm_readable_code[] = { |
7bc53e94 MD |
56 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_OK) ] = "Success", |
57 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR) ] = "Unknown error", | |
58 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOENT) ] = "No entry", | |
64b2564e DG |
59 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXIST) ] = "Object already exists", |
60 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL) ] = "Invalid argument", | |
61 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PERM) ] = "Permission denied", | |
62 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_NOSYS) ] = "Not implemented", | |
74d81a6c | 63 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_EXITING) ] = "Process is exiting", |
32ce8569 MD |
64 | |
65 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_MAGIC) ] = "Invalid magic number", | |
66 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_INVAL_SOCKET_TYPE) ] = "Invalid socket type", | |
67 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_UNSUP_MAJOR) ] = "Unsupported major version", | |
a834901f MD |
68 | [ USTCOMM_CODE_OFFSET(LTTNG_UST_ERR_PEERCRED) ] = "Cannot get unix socket peer credentials", |
69 | [ 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 |
70 | }; |
71 | ||
72 | /* | |
7bc53e94 | 73 | * lttng_ust_strerror |
67c5b804 | 74 | * |
7bc53e94 MD |
75 | * Receives positive error value. |
76 | * Return ptr to string representing a human readable | |
77 | * error code from the ustcomm_return_code enum. | |
67c5b804 | 78 | */ |
7bc53e94 | 79 | const char *lttng_ust_strerror(int code) |
67c5b804 | 80 | { |
7bc53e94 MD |
81 | if (code == LTTNG_UST_OK) |
82 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
83 | if (code < LTTNG_UST_ERR) | |
84 | return strerror(code); | |
85 | if (code >= LTTNG_UST_ERR_NR) | |
86 | code = LTTNG_UST_ERR; | |
87 | return ustcomm_readable_code[USTCOMM_CODE_OFFSET(code)]; | |
67c5b804 MD |
88 | } |
89 | ||
90 | /* | |
74d81a6c | 91 | * ustcomm_connect_unix_sock |
67c5b804 | 92 | * |
74d81a6c | 93 | * Connect to unix socket using the path name. |
6548fca4 MD |
94 | * |
95 | * Caller handles FD tracker. | |
67c5b804 | 96 | */ |
451d66b2 | 97 | int ustcomm_connect_unix_sock(const char *pathname, long timeout) |
67c5b804 MD |
98 | { |
99 | struct sockaddr_un sun; | |
7bc53e94 | 100 | int fd, ret; |
67c5b804 | 101 | |
204d45df MD |
102 | /* |
103 | * libust threads require the close-on-exec flag for all | |
104 | * resources so it does not leak file descriptors upon exec. | |
6daf0c26 | 105 | * SOCK_CLOEXEC is not used since it is linux specific. |
204d45df | 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. | |
6548fca4 MD |
260 | * |
261 | * Handles fd tracker internally. | |
74d81a6c MD |
262 | */ |
263 | int ustcomm_close_unix_sock(int sock) | |
264 | { | |
265 | int ret; | |
266 | ||
6548fca4 | 267 | lttng_ust_lock_fd_tracker(); |
74d81a6c | 268 | ret = close(sock); |
6548fca4 MD |
269 | if (!ret) { |
270 | lttng_ust_delete_fd_from_tracker(sock); | |
271 | } else { | |
32ce8569 | 272 | PERROR("close"); |
74d81a6c MD |
273 | ret = -errno; |
274 | } | |
6548fca4 | 275 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
276 | |
277 | return ret; | |
278 | } | |
279 | ||
280 | /* | |
281 | * ustcomm_recv_unix_sock | |
67c5b804 | 282 | * |
74d81a6c MD |
283 | * Receive data of size len in put that data into |
284 | * the buf param. Using recvmsg API. | |
285 | * Return the size of received data. | |
286 | * Return 0 on orderly shutdown. | |
67c5b804 | 287 | */ |
57773204 | 288 | ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len) |
67c5b804 | 289 | { |
913b87f1 | 290 | struct msghdr msg; |
67c5b804 | 291 | struct iovec iov[1]; |
89c5b6ec MD |
292 | ssize_t ret = -1; |
293 | size_t len_last; | |
67c5b804 | 294 | |
913b87f1 MD |
295 | memset(&msg, 0, sizeof(msg)); |
296 | ||
67c5b804 MD |
297 | iov[0].iov_base = buf; |
298 | iov[0].iov_len = len; | |
299 | msg.msg_iov = iov; | |
300 | msg.msg_iovlen = 1; | |
301 | ||
7e3cfcbe | 302 | do { |
89c5b6ec | 303 | len_last = iov[0].iov_len; |
7e3cfcbe | 304 | ret = recvmsg(sock, &msg, 0); |
89c5b6ec MD |
305 | if (ret > 0) { |
306 | iov[0].iov_base += ret; | |
307 | iov[0].iov_len -= ret; | |
308 | assert(ret <= len_last); | |
309 | } | |
310 | } while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR)); | |
7bc53e94 MD |
311 | |
312 | if (ret < 0) { | |
313 | int shutret; | |
314 | ||
8cf811d3 | 315 | if (errno != EPIPE && errno != ECONNRESET && errno != ECONNREFUSED) |
32ce8569 | 316 | PERROR("recvmsg"); |
7bc53e94 | 317 | ret = -errno; |
8cf811d3 | 318 | if (ret == -ECONNRESET || ret == -ECONNREFUSED) |
b869b5ae | 319 | ret = -EPIPE; |
7bc53e94 MD |
320 | |
321 | shutret = shutdown(sock, SHUT_RDWR); | |
322 | if (shutret) | |
32ce8569 | 323 | ERR("Socket shutdown error"); |
89c5b6ec MD |
324 | } else if (ret > 0) { |
325 | ret = len; | |
67c5b804 | 326 | } |
89c5b6ec | 327 | /* ret = 0 means an orderly shutdown. */ |
67c5b804 MD |
328 | |
329 | return ret; | |
330 | } | |
331 | ||
332 | /* | |
74d81a6c | 333 | * ustcomm_send_unix_sock |
67c5b804 | 334 | * |
74d81a6c MD |
335 | * Send buf data of size len. Using sendmsg API. |
336 | * Return the size of sent data. | |
67c5b804 | 337 | */ |
32ce8569 | 338 | ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len) |
67c5b804 | 339 | { |
913b87f1 | 340 | struct msghdr msg; |
67c5b804 | 341 | struct iovec iov[1]; |
7bc53e94 | 342 | ssize_t ret; |
67c5b804 | 343 | |
913b87f1 MD |
344 | memset(&msg, 0, sizeof(msg)); |
345 | ||
32ce8569 | 346 | iov[0].iov_base = (void *) buf; |
67c5b804 MD |
347 | iov[0].iov_len = len; |
348 | msg.msg_iov = iov; | |
349 | msg.msg_iovlen = 1; | |
350 | ||
1ea11eab MD |
351 | /* |
352 | * Using the MSG_NOSIGNAL when sending data from sessiond to | |
353 | * libust, so libust does not receive an unhandled SIGPIPE or | |
354 | * SIGURG. The sessiond receiver side can be made more resilient | |
355 | * by ignoring SIGPIPE, but we don't have this luxury on the | |
356 | * libust side. | |
357 | */ | |
51d9d699 MD |
358 | do { |
359 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); | |
360 | } while (ret < 0 && errno == EINTR); | |
7bc53e94 MD |
361 | |
362 | if (ret < 0) { | |
363 | int shutret; | |
364 | ||
74d81a6c | 365 | if (errno != EPIPE && errno != ECONNRESET) |
32ce8569 | 366 | PERROR("sendmsg"); |
7bc53e94 | 367 | ret = -errno; |
b869b5ae MD |
368 | if (ret == -ECONNRESET) |
369 | ret = -EPIPE; | |
7bc53e94 MD |
370 | |
371 | shutret = shutdown(sock, SHUT_RDWR); | |
372 | if (shutret) | |
32ce8569 | 373 | ERR("Socket shutdown error"); |
67c5b804 MD |
374 | } |
375 | ||
376 | return ret; | |
377 | } | |
378 | ||
379 | /* | |
74d81a6c | 380 | * Send a message accompanied by fd(s) over a unix socket. |
67c5b804 | 381 | * |
74d81a6c | 382 | * Returns the size of data sent, or negative error value. |
67c5b804 | 383 | */ |
74d81a6c | 384 | ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd) |
67c5b804 | 385 | { |
913b87f1 | 386 | struct msghdr msg; |
67c5b804 MD |
387 | struct cmsghdr *cmptr; |
388 | struct iovec iov[1]; | |
389 | ssize_t ret = -1; | |
390 | unsigned int sizeof_fds = nb_fd * sizeof(int); | |
391 | char tmp[CMSG_SPACE(sizeof_fds)]; | |
74d81a6c | 392 | char dummy = 0; |
67c5b804 | 393 | |
913b87f1 | 394 | memset(&msg, 0, sizeof(msg)); |
74d81a6c | 395 | memset(tmp, 0, CMSG_SPACE(sizeof_fds) * sizeof(char)); |
913b87f1 | 396 | |
74d81a6c MD |
397 | if (nb_fd > USTCOMM_MAX_SEND_FDS) |
398 | return -EINVAL; | |
67c5b804 MD |
399 | |
400 | msg.msg_control = (caddr_t)tmp; | |
401 | msg.msg_controllen = CMSG_LEN(sizeof_fds); | |
402 | ||
403 | cmptr = CMSG_FIRSTHDR(&msg); | |
34daae3e MD |
404 | if (!cmptr) |
405 | return -EINVAL; | |
67c5b804 MD |
406 | cmptr->cmsg_level = SOL_SOCKET; |
407 | cmptr->cmsg_type = SCM_RIGHTS; | |
408 | cmptr->cmsg_len = CMSG_LEN(sizeof_fds); | |
409 | memcpy(CMSG_DATA(cmptr), fds, sizeof_fds); | |
410 | /* Sum of the length of all control messages in the buffer: */ | |
411 | msg.msg_controllen = cmptr->cmsg_len; | |
412 | ||
74d81a6c MD |
413 | iov[0].iov_base = &dummy; |
414 | iov[0].iov_len = 1; | |
67c5b804 MD |
415 | msg.msg_iov = iov; |
416 | msg.msg_iovlen = 1; | |
417 | ||
51d9d699 | 418 | do { |
0dafcd63 | 419 | ret = sendmsg(sock, &msg, MSG_NOSIGNAL); |
51d9d699 | 420 | } while (ret < 0 && errno == EINTR); |
7bc53e94 | 421 | if (ret < 0) { |
74d81a6c MD |
422 | /* |
423 | * We consider EPIPE and ECONNRESET as expected. | |
424 | */ | |
425 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 426 | PERROR("sendmsg"); |
74d81a6c | 427 | } |
b869b5ae MD |
428 | ret = -errno; |
429 | if (ret == -ECONNRESET) | |
430 | ret = -EPIPE; | |
74d81a6c MD |
431 | } |
432 | return ret; | |
433 | } | |
7bc53e94 | 434 | |
74d81a6c MD |
435 | /* |
436 | * Recv a message accompanied by fd(s) from a unix socket. | |
437 | * | |
74d81a6c MD |
438 | * Expect at most "nb_fd" file descriptors. Returns the number of fd |
439 | * actually received in nb_fd. | |
440 | * Returns -EPIPE on orderly shutdown. | |
441 | */ | |
442 | ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd) | |
443 | { | |
444 | struct iovec iov[1]; | |
445 | ssize_t ret = 0; | |
446 | struct cmsghdr *cmsg; | |
447 | size_t sizeof_fds = nb_fd * sizeof(int); | |
448 | char recv_fd[CMSG_SPACE(sizeof_fds)]; | |
449 | struct msghdr msg; | |
450 | char dummy; | |
6daf0c26 | 451 | int i; |
7bc53e94 | 452 | |
74d81a6c | 453 | memset(&msg, 0, sizeof(msg)); |
67c5b804 | 454 | |
74d81a6c MD |
455 | /* Prepare to receive the structures */ |
456 | iov[0].iov_base = &dummy; | |
457 | iov[0].iov_len = 1; | |
458 | msg.msg_iov = iov; | |
459 | msg.msg_iovlen = 1; | |
460 | msg.msg_control = recv_fd; | |
461 | msg.msg_controllen = sizeof(recv_fd); | |
462 | ||
463 | do { | |
464 | ret = recvmsg(sock, &msg, 0); | |
465 | } while (ret < 0 && errno == EINTR); | |
466 | if (ret < 0) { | |
467 | if (errno != EPIPE && errno != ECONNRESET) { | |
32ce8569 | 468 | PERROR("recvmsg fds"); |
74d81a6c | 469 | } |
8cf811d3 | 470 | ret = -errno; |
b869b5ae MD |
471 | if (ret == -ECONNRESET) |
472 | ret = -EPIPE; | |
74d81a6c MD |
473 | goto end; |
474 | } | |
475 | if (ret == 0) { | |
476 | /* orderly shutdown */ | |
477 | ret = -EPIPE; | |
478 | goto end; | |
479 | } | |
480 | if (ret != 1) { | |
32ce8569 | 481 | ERR("Error: Received %zd bytes, expected %d\n", |
74d81a6c MD |
482 | ret, 1); |
483 | goto end; | |
484 | } | |
485 | if (msg.msg_flags & MSG_CTRUNC) { | |
32ce8569 | 486 | ERR("Error: Control message truncated.\n"); |
74d81a6c MD |
487 | ret = -1; |
488 | goto end; | |
489 | } | |
490 | cmsg = CMSG_FIRSTHDR(&msg); | |
491 | if (!cmsg) { | |
32ce8569 | 492 | ERR("Error: Invalid control message header\n"); |
74d81a6c MD |
493 | ret = -1; |
494 | goto end; | |
495 | } | |
496 | if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) { | |
32ce8569 | 497 | ERR("Didn't received any fd\n"); |
74d81a6c MD |
498 | ret = -1; |
499 | goto end; | |
500 | } | |
501 | if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) { | |
32ce8569 | 502 | ERR("Error: Received %zu bytes of ancillary data, expected %zu\n", |
74d81a6c MD |
503 | (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds)); |
504 | ret = -1; | |
505 | goto end; | |
506 | } | |
6daf0c26 | 507 | |
74d81a6c | 508 | memcpy(fds, CMSG_DATA(cmsg), sizeof_fds); |
6daf0c26 JR |
509 | |
510 | /* Set FD_CLOEXEC */ | |
511 | for (i = 0; i < nb_fd; i++) { | |
512 | ret = fcntl(fds[i], F_SETFD, FD_CLOEXEC); | |
513 | if (ret < 0) { | |
514 | PERROR("fcntl failed to set FD_CLOEXEC on fd %d", | |
515 | fds[i]); | |
516 | } | |
517 | } | |
518 | ||
6b32a5c3 | 519 | ret = nb_fd; |
74d81a6c | 520 | end: |
67c5b804 MD |
521 | return ret; |
522 | } | |
57773204 MD |
523 | |
524 | int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum) | |
525 | { | |
526 | ssize_t len; | |
527 | ||
528 | len = ustcomm_send_unix_sock(sock, lum, sizeof(*lum)); | |
529 | switch (len) { | |
530 | case sizeof(*lum): | |
57773204 | 531 | break; |
57773204 | 532 | default: |
7bc53e94 | 533 | if (len < 0) { |
7bc53e94 MD |
534 | return len; |
535 | } else { | |
32ce8569 | 536 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 MD |
537 | return -EINVAL; |
538 | } | |
57773204 MD |
539 | } |
540 | return 0; | |
541 | } | |
542 | ||
543 | int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur, | |
544 | uint32_t expected_handle, uint32_t expected_cmd) | |
545 | { | |
546 | ssize_t len; | |
547 | ||
548 | memset(lur, 0, sizeof(*lur)); | |
549 | len = ustcomm_recv_unix_sock(sock, lur, sizeof(*lur)); | |
550 | switch (len) { | |
551 | case 0: /* orderly shutdown */ | |
74d81a6c | 552 | return -EPIPE; |
57773204 | 553 | case sizeof(*lur): |
5dafeeaa MD |
554 | { |
555 | int err = 0; | |
556 | ||
57773204 | 557 | if (lur->handle != expected_handle) { |
32ce8569 | 558 | ERR("Unexpected result message handle: " |
74d81a6c MD |
559 | "expected: %u vs received: %u\n", |
560 | expected_handle, lur->handle); | |
5dafeeaa | 561 | err = 1; |
57773204 | 562 | } |
57773204 | 563 | if (lur->cmd != expected_cmd) { |
32ce8569 | 564 | ERR("Unexpected result message command " |
74d81a6c MD |
565 | "expected: %u vs received: %u\n", |
566 | expected_cmd, lur->cmd); | |
5dafeeaa MD |
567 | err = 1; |
568 | } | |
569 | if (err) { | |
57773204 | 570 | return -EINVAL; |
5dafeeaa MD |
571 | } else { |
572 | return lur->ret_code; | |
57773204 | 573 | } |
5dafeeaa | 574 | } |
57773204 | 575 | default: |
8cf811d3 | 576 | if (len >= 0) { |
32ce8569 | 577 | ERR("incorrect message size: %zd\n", len); |
7bc53e94 | 578 | } |
8cf811d3 | 579 | return len; |
57773204 MD |
580 | } |
581 | } | |
582 | ||
583 | int ustcomm_send_app_cmd(int sock, | |
584 | struct ustcomm_ust_msg *lum, | |
585 | struct ustcomm_ust_reply *lur) | |
586 | { | |
587 | int ret; | |
588 | ||
589 | ret = ustcomm_send_app_msg(sock, lum); | |
590 | if (ret) | |
591 | return ret; | |
c354a72c MD |
592 | ret = ustcomm_recv_app_reply(sock, lur, lum->handle, lum->cmd); |
593 | if (ret > 0) | |
594 | return -EIO; | |
595 | return ret; | |
57773204 MD |
596 | } |
597 | ||
57773204 | 598 | /* |
74d81a6c MD |
599 | * chan_data is allocated internally if this function returns the |
600 | * expected var_len. | |
57773204 | 601 | */ |
74d81a6c | 602 | ssize_t ustcomm_recv_channel_from_sessiond(int sock, |
ff0f5728 MD |
603 | void **_chan_data, uint64_t var_len, |
604 | int *_wakeup_fd) | |
57773204 | 605 | { |
74d81a6c | 606 | void *chan_data; |
ff0f5728 | 607 | ssize_t len, nr_fd; |
f5c453e9 | 608 | int wakeup_fd, ret; |
57773204 | 609 | |
74d81a6c MD |
610 | if (var_len > LTTNG_UST_CHANNEL_DATA_MAX_LEN) { |
611 | len = -EINVAL; | |
612 | goto error_check; | |
57773204 | 613 | } |
74d81a6c MD |
614 | /* Receive variable length data */ |
615 | chan_data = zmalloc(var_len); | |
616 | if (!chan_data) { | |
617 | len = -ENOMEM; | |
618 | goto error_alloc; | |
57773204 | 619 | } |
74d81a6c MD |
620 | len = ustcomm_recv_unix_sock(sock, chan_data, var_len); |
621 | if (len != var_len) { | |
622 | goto error_recv; | |
57773204 | 623 | } |
ff0f5728 | 624 | /* recv wakeup fd */ |
6548fca4 | 625 | lttng_ust_lock_fd_tracker(); |
ff0f5728 MD |
626 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &wakeup_fd, 1); |
627 | if (nr_fd <= 0) { | |
6548fca4 | 628 | lttng_ust_unlock_fd_tracker(); |
ff0f5728 MD |
629 | if (nr_fd < 0) { |
630 | len = nr_fd; | |
631 | goto error_recv; | |
632 | } else { | |
633 | len = -EIO; | |
634 | goto error_recv; | |
635 | } | |
636 | } | |
f5c453e9 JR |
637 | |
638 | ret = lttng_ust_add_fd_to_tracker(wakeup_fd); | |
639 | if (ret < 0) { | |
f5c453e9 JR |
640 | ret = close(wakeup_fd); |
641 | if (ret) { | |
642 | PERROR("close on wakeup_fd"); | |
643 | } | |
644 | len = -EIO; | |
20d1999d | 645 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
646 | goto error_recv; |
647 | } | |
648 | ||
649 | *_wakeup_fd = ret; | |
6548fca4 | 650 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 | 651 | |
74d81a6c MD |
652 | *_chan_data = chan_data; |
653 | return len; | |
654 | ||
655 | error_recv: | |
656 | free(chan_data); | |
657 | error_alloc: | |
658 | error_check: | |
659 | return len; | |
660 | } | |
7bc53e94 | 661 | |
d8d2416d FD |
662 | ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock, |
663 | int *_event_notifier_notif_fd) | |
664 | { | |
665 | ssize_t nr_fd; | |
666 | int event_notifier_notif_fd, ret; | |
667 | ||
668 | /* Receive event_notifier notification fd */ | |
669 | lttng_ust_lock_fd_tracker(); | |
670 | nr_fd = ustcomm_recv_fds_unix_sock(sock, &event_notifier_notif_fd, 1); | |
671 | if (nr_fd <= 0) { | |
672 | lttng_ust_unlock_fd_tracker(); | |
673 | if (nr_fd < 0) { | |
674 | ret = nr_fd; | |
675 | goto error; | |
676 | } else { | |
677 | ret = -EIO; | |
678 | goto error; | |
679 | } | |
680 | } | |
681 | ||
682 | ret = lttng_ust_add_fd_to_tracker(event_notifier_notif_fd); | |
683 | if (ret < 0) { | |
684 | ret = close(event_notifier_notif_fd); | |
685 | if (ret) { | |
686 | PERROR("close on event_notifier notif fd"); | |
687 | } | |
688 | ret = -EIO; | |
689 | lttng_ust_unlock_fd_tracker(); | |
690 | goto error; | |
691 | } | |
692 | ||
693 | *_event_notifier_notif_fd = ret; | |
694 | lttng_ust_unlock_fd_tracker(); | |
695 | ||
696 | ret = nr_fd; | |
697 | ||
698 | error: | |
699 | return ret; | |
700 | } | |
701 | ||
74d81a6c MD |
702 | int ustcomm_recv_stream_from_sessiond(int sock, |
703 | uint64_t *memory_map_size, | |
704 | int *shm_fd, int *wakeup_fd) | |
705 | { | |
706 | ssize_t len; | |
707 | int ret; | |
708 | int fds[2]; | |
709 | ||
710 | /* recv shm fd and wakeup fd */ | |
6548fca4 | 711 | lttng_ust_lock_fd_tracker(); |
74d81a6c MD |
712 | len = ustcomm_recv_fds_unix_sock(sock, fds, 2); |
713 | if (len <= 0) { | |
6548fca4 | 714 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
715 | if (len < 0) { |
716 | ret = len; | |
717 | goto error; | |
718 | } else { | |
719 | ret = -EIO; | |
720 | goto error; | |
721 | } | |
7bc53e94 | 722 | } |
f5c453e9 JR |
723 | |
724 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
725 | if (ret < 0) { | |
f5c453e9 JR |
726 | ret = close(fds[0]); |
727 | if (ret) { | |
728 | PERROR("close on received shm_fd"); | |
729 | } | |
730 | ret = -EIO; | |
20d1999d | 731 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
732 | goto error; |
733 | } | |
734 | *shm_fd = ret; | |
735 | ||
736 | ret = lttng_ust_add_fd_to_tracker(fds[1]); | |
737 | if (ret < 0) { | |
f5c453e9 JR |
738 | ret = close(*shm_fd); |
739 | if (ret) { | |
740 | PERROR("close on shm_fd"); | |
741 | } | |
742 | *shm_fd = -1; | |
743 | ret = close(fds[1]); | |
744 | if (ret) { | |
745 | PERROR("close on received wakeup_fd"); | |
746 | } | |
747 | ret = -EIO; | |
20d1999d | 748 | lttng_ust_unlock_fd_tracker(); |
f5c453e9 JR |
749 | goto error; |
750 | } | |
751 | *wakeup_fd = ret; | |
6548fca4 | 752 | lttng_ust_unlock_fd_tracker(); |
74d81a6c MD |
753 | return 0; |
754 | ||
755 | error: | |
57773204 MD |
756 | return ret; |
757 | } | |
32ce8569 | 758 | |
ebabbf58 MD |
759 | ssize_t ustcomm_recv_counter_from_sessiond(int sock, |
760 | void **_counter_data, uint64_t var_len) | |
761 | { | |
762 | void *counter_data; | |
763 | ssize_t len; | |
764 | ||
765 | if (var_len > LTTNG_UST_COUNTER_DATA_MAX_LEN) { | |
766 | len = -EINVAL; | |
767 | goto error_check; | |
768 | } | |
769 | /* Receive variable length data */ | |
770 | counter_data = zmalloc(var_len); | |
771 | if (!counter_data) { | |
772 | len = -ENOMEM; | |
773 | goto error_alloc; | |
774 | } | |
775 | len = ustcomm_recv_unix_sock(sock, counter_data, var_len); | |
776 | if (len != var_len) { | |
777 | goto error_recv; | |
778 | } | |
779 | *_counter_data = counter_data; | |
780 | return len; | |
781 | ||
782 | error_recv: | |
783 | free(counter_data); | |
784 | error_alloc: | |
785 | error_check: | |
786 | return len; | |
787 | } | |
788 | ||
789 | int ustcomm_recv_counter_shm_from_sessiond(int sock, | |
790 | int *shm_fd) | |
791 | { | |
792 | ssize_t len; | |
793 | int ret; | |
794 | int fds[1]; | |
795 | ||
796 | /* recv shm fd fd */ | |
797 | lttng_ust_lock_fd_tracker(); | |
798 | len = ustcomm_recv_fds_unix_sock(sock, fds, 1); | |
799 | if (len <= 0) { | |
800 | lttng_ust_unlock_fd_tracker(); | |
801 | if (len < 0) { | |
802 | ret = len; | |
803 | goto error; | |
804 | } else { | |
805 | ret = -EIO; | |
806 | goto error; | |
807 | } | |
808 | } | |
809 | ||
810 | ret = lttng_ust_add_fd_to_tracker(fds[0]); | |
811 | if (ret < 0) { | |
812 | ret = close(fds[0]); | |
813 | if (ret) { | |
814 | PERROR("close on received shm_fd"); | |
815 | } | |
816 | ret = -EIO; | |
817 | lttng_ust_unlock_fd_tracker(); | |
818 | goto error; | |
819 | } | |
820 | *shm_fd = ret; | |
821 | lttng_ust_unlock_fd_tracker(); | |
822 | return 0; | |
823 | ||
824 | error: | |
825 | return ret; | |
826 | } | |
827 | ||
32ce8569 MD |
828 | /* |
829 | * Returns 0 on success, negative error value on error. | |
830 | */ | |
831 | int ustcomm_send_reg_msg(int sock, | |
832 | enum ustctl_socket_type type, | |
833 | uint32_t bits_per_long, | |
834 | uint32_t uint8_t_alignment, | |
835 | uint32_t uint16_t_alignment, | |
836 | uint32_t uint32_t_alignment, | |
837 | uint32_t uint64_t_alignment, | |
838 | uint32_t long_alignment) | |
839 | { | |
840 | ssize_t len; | |
841 | struct ustctl_reg_msg reg_msg; | |
842 | ||
843 | reg_msg.magic = LTTNG_UST_COMM_MAGIC; | |
844 | reg_msg.major = LTTNG_UST_ABI_MAJOR_VERSION; | |
845 | reg_msg.minor = LTTNG_UST_ABI_MINOR_VERSION; | |
846 | reg_msg.pid = getpid(); | |
847 | reg_msg.ppid = getppid(); | |
848 | reg_msg.uid = getuid(); | |
849 | reg_msg.gid = getgid(); | |
850 | reg_msg.bits_per_long = bits_per_long; | |
851 | reg_msg.uint8_t_alignment = uint8_t_alignment; | |
852 | reg_msg.uint16_t_alignment = uint16_t_alignment; | |
853 | reg_msg.uint32_t_alignment = uint32_t_alignment; | |
854 | reg_msg.uint64_t_alignment = uint64_t_alignment; | |
855 | reg_msg.long_alignment = long_alignment; | |
856 | reg_msg.socket_type = type; | |
0db3d6ee | 857 | lttng_pthread_getname_np(reg_msg.name, LTTNG_UST_ABI_PROCNAME_LEN); |
32ce8569 MD |
858 | memset(reg_msg.padding, 0, sizeof(reg_msg.padding)); |
859 | ||
860 | len = ustcomm_send_unix_sock(sock, ®_msg, sizeof(reg_msg)); | |
861 | if (len > 0 && len != sizeof(reg_msg)) | |
862 | return -EIO; | |
863 | if (len < 0) | |
864 | return len; | |
865 | return 0; | |
866 | } | |
867 | ||
53569322 MD |
868 | static |
869 | ssize_t count_one_type(const struct lttng_type *lt) | |
870 | { | |
871 | switch (lt->atype) { | |
872 | case atype_integer: | |
873 | case atype_float: | |
874 | case atype_string: | |
875 | case atype_enum: | |
876 | case atype_array: | |
877 | case atype_sequence: | |
878 | return 1; | |
879 | case atype_struct: | |
218deb69 | 880 | return count_fields_recursive(lt->u.legacy._struct.nr_fields, |
cf22367f | 881 | lt->u.legacy._struct.fields) + 1; |
218deb69 MD |
882 | case atype_enum_nestable: |
883 | return count_one_type(lt->u.enum_nestable.container_type) + 1; | |
884 | case atype_array_nestable: | |
885 | return count_one_type(lt->u.array_nestable.elem_type) + 1; | |
886 | case atype_sequence_nestable: | |
887 | return count_one_type(lt->u.sequence_nestable.elem_type) + 1; | |
888 | case atype_struct_nestable: | |
889 | return count_fields_recursive(lt->u.struct_nestable.nr_fields, | |
cf22367f | 890 | lt->u.struct_nestable.fields) + 1; |
218deb69 | 891 | |
53569322 MD |
892 | case atype_dynamic: |
893 | { | |
894 | const struct lttng_event_field *choices; | |
895 | size_t nr_choices; | |
896 | int ret; | |
897 | ||
898 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
899 | &choices); | |
900 | if (ret) | |
901 | return ret; | |
902 | /* | |
cf22367f | 903 | * Two fields for enum, one field for variant, and |
53569322 MD |
904 | * one field per choice. |
905 | */ | |
cf22367f | 906 | return count_fields_recursive(nr_choices, choices) + 3; |
53569322 | 907 | } |
218deb69 | 908 | |
53569322 MD |
909 | default: |
910 | return -EINVAL; | |
911 | } | |
912 | return 0; | |
913 | } | |
914 | ||
915 | static | |
916 | ssize_t count_fields_recursive(size_t nr_fields, | |
917 | const struct lttng_event_field *lttng_fields) | |
918 | { | |
919 | int i; | |
920 | ssize_t ret, count = 0; | |
921 | ||
922 | for (i = 0; i < nr_fields; i++) { | |
923 | const struct lttng_event_field *lf; | |
924 | ||
925 | lf = <tng_fields[i]; | |
926 | /* skip 'nowrite' fields */ | |
927 | if (lf->nowrite) | |
928 | continue; | |
929 | ret = count_one_type(&lf->type); | |
930 | if (ret < 0) | |
931 | return ret; /* error */ | |
932 | count += ret; | |
933 | } | |
934 | return count; | |
935 | } | |
936 | ||
937 | static | |
938 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
939 | const struct lttng_ctx_field *lttng_fields) | |
940 | { | |
941 | int i; | |
942 | ssize_t ret, count = 0; | |
943 | ||
944 | for (i = 0; i < nr_fields; i++) { | |
945 | const struct lttng_event_field *lf; | |
946 | ||
947 | lf = <tng_fields[i].event_field; | |
948 | /* skip 'nowrite' fields */ | |
949 | if (lf->nowrite) | |
950 | continue; | |
951 | ret = count_one_type(&lf->type); | |
952 | if (ret < 0) | |
953 | return ret; /* error */ | |
954 | count += ret; | |
955 | } | |
956 | return count; | |
957 | } | |
958 | ||
7f2348b8 | 959 | static |
735ea6a8 | 960 | int serialize_string_encoding(int32_t *ue, |
7f2348b8 MD |
961 | enum lttng_string_encodings le) |
962 | { | |
963 | switch (le) { | |
964 | case lttng_encode_none: | |
965 | *ue = ustctl_encode_none; | |
966 | break; | |
967 | case lttng_encode_UTF8: | |
968 | *ue = ustctl_encode_UTF8; | |
969 | break; | |
970 | case lttng_encode_ASCII: | |
971 | *ue = ustctl_encode_ASCII; | |
972 | break; | |
973 | default: | |
974 | return -EINVAL; | |
975 | } | |
976 | return 0; | |
977 | } | |
978 | ||
32ce8569 | 979 | static |
c785c634 MD |
980 | int serialize_integer_type(struct ustctl_integer_type *uit, |
981 | const struct lttng_integer_type *lit) | |
982 | { | |
973eac63 GAPG |
983 | int32_t encoding; |
984 | ||
c785c634 MD |
985 | uit->size = lit->size; |
986 | uit->signedness = lit->signedness; | |
987 | uit->reverse_byte_order = lit->reverse_byte_order; | |
988 | uit->base = lit->base; | |
973eac63 | 989 | if (serialize_string_encoding(&encoding, lit->encoding)) |
c785c634 | 990 | return -EINVAL; |
973eac63 | 991 | uit->encoding = encoding; |
c785c634 MD |
992 | uit->alignment = lit->alignment; |
993 | return 0; | |
994 | } | |
995 | ||
996 | static | |
997 | int serialize_basic_type(struct lttng_session *session, | |
998 | enum ustctl_abstract_types *uatype, | |
2b213b16 | 999 | enum lttng_abstract_types atype, |
32ce8569 MD |
1000 | union _ustctl_basic_type *ubt, |
1001 | const union _lttng_basic_type *lbt) | |
1002 | { | |
1003 | switch (atype) { | |
1004 | case atype_integer: | |
1005 | { | |
c785c634 | 1006 | if (serialize_integer_type(&ubt->integer, &lbt->integer)) |
7f2348b8 | 1007 | return -EINVAL; |
2b213b16 | 1008 | *uatype = ustctl_atype_integer; |
32ce8569 MD |
1009 | break; |
1010 | } | |
1011 | case atype_string: | |
1012 | { | |
973eac63 GAPG |
1013 | int32_t encoding; |
1014 | ||
1015 | if (serialize_string_encoding(&encoding, lbt->string.encoding)) | |
7f2348b8 | 1016 | return -EINVAL; |
973eac63 | 1017 | ubt->string.encoding = encoding; |
2b213b16 | 1018 | *uatype = ustctl_atype_string; |
32ce8569 MD |
1019 | break; |
1020 | } | |
1021 | case atype_float: | |
1022 | { | |
1023 | struct ustctl_float_type *uft; | |
1024 | const struct lttng_float_type *lft; | |
1025 | ||
1026 | uft = &ubt->_float; | |
1027 | lft = &lbt->_float; | |
1028 | uft->exp_dig = lft->exp_dig; | |
1029 | uft->mant_dig = lft->mant_dig; | |
1030 | uft->alignment = lft->alignment; | |
1031 | uft->reverse_byte_order = lft->reverse_byte_order; | |
2b213b16 | 1032 | *uatype = ustctl_atype_float; |
32ce8569 MD |
1033 | break; |
1034 | } | |
1035 | case atype_enum: | |
c785c634 MD |
1036 | { |
1037 | strncpy(ubt->enumeration.name, lbt->enumeration.desc->name, | |
1038 | LTTNG_UST_SYM_NAME_LEN); | |
1039 | ubt->enumeration.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1040 | if (serialize_integer_type(&ubt->enumeration.container_type, | |
1041 | &lbt->enumeration.container_type)) | |
1042 | return -EINVAL; | |
1043 | if (session) { | |
1044 | const struct lttng_enum *_enum; | |
1045 | ||
b33b46f7 | 1046 | _enum = lttng_ust_enum_get_from_desc(session, lbt->enumeration.desc); |
c785c634 MD |
1047 | if (!_enum) |
1048 | return -EINVAL; | |
1049 | ubt->enumeration.id = _enum->id; | |
1050 | } else { | |
1051 | ubt->enumeration.id = -1ULL; | |
1052 | } | |
1053 | *uatype = ustctl_atype_enum; | |
1054 | break; | |
1055 | } | |
32ce8569 | 1056 | case atype_array: |
218deb69 | 1057 | case atype_array_nestable: |
32ce8569 | 1058 | case atype_sequence: |
218deb69 MD |
1059 | case atype_sequence_nestable: |
1060 | case atype_enum_nestable: | |
32ce8569 MD |
1061 | default: |
1062 | return -EINVAL; | |
1063 | } | |
1064 | return 0; | |
32ce8569 MD |
1065 | } |
1066 | ||
1067 | static | |
53569322 MD |
1068 | int serialize_dynamic_type(struct lttng_session *session, |
1069 | struct ustctl_field *fields, size_t *iter_output, | |
218deb69 | 1070 | const char *field_name) |
32ce8569 | 1071 | { |
53569322 MD |
1072 | const struct lttng_event_field *choices; |
1073 | char tag_field_name[LTTNG_UST_SYM_NAME_LEN]; | |
1074 | const struct lttng_type *tag_type; | |
1075 | const struct lttng_event_field *tag_field_generic; | |
1076 | struct lttng_event_field tag_field = { | |
1077 | .name = tag_field_name, | |
1078 | .nowrite = 0, | |
1079 | }; | |
1080 | struct ustctl_field *uf; | |
1081 | size_t nr_choices, i; | |
32ce8569 MD |
1082 | int ret; |
1083 | ||
53569322 MD |
1084 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
1085 | tag_type = &tag_field_generic->type; | |
1086 | ||
1087 | /* Serialize enum field. */ | |
218deb69 | 1088 | strncpy(tag_field_name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
1089 | tag_field_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1090 | strncat(tag_field_name, | |
1091 | "_tag", | |
1092 | LTTNG_UST_SYM_NAME_LEN - strlen(tag_field_name) - 1); | |
1093 | tag_field.type = *tag_type; | |
1094 | ret = serialize_one_field(session, fields, iter_output, | |
1095 | &tag_field); | |
1096 | if (ret) | |
1097 | return ret; | |
1098 | ||
1099 | /* Serialize variant field. */ | |
1100 | uf = &fields[*iter_output]; | |
1101 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
1102 | if (ret) | |
1103 | return ret; | |
1104 | ||
218deb69 | 1105 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); |
53569322 MD |
1106 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1107 | uf->type.atype = ustctl_atype_variant; | |
218deb69 MD |
1108 | uf->type.u.variant_nestable.nr_choices = nr_choices; |
1109 | strncpy(uf->type.u.variant_nestable.tag_name, | |
53569322 MD |
1110 | tag_field_name, |
1111 | LTTNG_UST_SYM_NAME_LEN); | |
218deb69 MD |
1112 | uf->type.u.variant_nestable.tag_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
1113 | uf->type.u.variant_nestable.alignment = 0; | |
53569322 MD |
1114 | (*iter_output)++; |
1115 | ||
1116 | /* Serialize choice fields after variant. */ | |
1117 | for (i = 0; i < nr_choices; i++) { | |
1118 | ret = serialize_one_field(session, fields, | |
1119 | iter_output, &choices[i]); | |
1120 | if (ret) | |
1121 | return ret; | |
1122 | } | |
1123 | return 0; | |
1124 | } | |
1125 | ||
1126 | static | |
218deb69 | 1127 | int serialize_one_type(struct lttng_session *session, |
53569322 | 1128 | struct ustctl_field *fields, size_t *iter_output, |
218deb69 | 1129 | const char *field_name, const struct lttng_type *lt) |
53569322 | 1130 | { |
53569322 MD |
1131 | int ret; |
1132 | ||
218deb69 MD |
1133 | /* |
1134 | * Serializing a type (rather than a field) generates a ustctl_field | |
1135 | * entry with 0-length name. | |
1136 | */ | |
53569322 | 1137 | |
32ce8569 MD |
1138 | switch (lt->atype) { |
1139 | case atype_integer: | |
1140 | case atype_float: | |
1141 | case atype_string: | |
c785c634 | 1142 | case atype_enum: |
53569322 MD |
1143 | { |
1144 | struct ustctl_field *uf = &fields[*iter_output]; | |
1145 | struct ustctl_type *ut = &uf->type; | |
973eac63 | 1146 | enum ustctl_abstract_types atype; |
53569322 | 1147 | |
218deb69 MD |
1148 | if (field_name) { |
1149 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1150 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1151 | } else { | |
1152 | uf->name[0] = '\0'; | |
1153 | } | |
973eac63 | 1154 | ret = serialize_basic_type(session, &atype, lt->atype, |
218deb69 | 1155 | &ut->u.legacy.basic, <->u.legacy.basic); |
32ce8569 MD |
1156 | if (ret) |
1157 | return ret; | |
973eac63 | 1158 | ut->atype = atype; |
53569322 | 1159 | (*iter_output)++; |
32ce8569 | 1160 | break; |
53569322 | 1161 | } |
32ce8569 MD |
1162 | case atype_array: |
1163 | { | |
53569322 MD |
1164 | struct ustctl_field *uf = &fields[*iter_output]; |
1165 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1166 | struct ustctl_basic_type *ubt; |
1167 | const struct lttng_basic_type *lbt; | |
973eac63 | 1168 | enum ustctl_abstract_types atype; |
32ce8569 | 1169 | |
218deb69 MD |
1170 | if (field_name) { |
1171 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1172 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1173 | } else { | |
1174 | uf->name[0] = '\0'; | |
1175 | } | |
1176 | ut->atype = ustctl_atype_array; | |
1177 | ubt = &ut->u.legacy.array.elem_type; | |
1178 | lbt = <->u.legacy.array.elem_type; | |
1179 | ut->u.legacy.array.length = lt->u.legacy.array.length; | |
973eac63 | 1180 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1181 | &ubt->u.basic, &lbt->u.basic); |
1182 | if (ret) | |
1183 | return -EINVAL; | |
973eac63 | 1184 | ubt->atype = atype; |
53569322 | 1185 | (*iter_output)++; |
32ce8569 MD |
1186 | break; |
1187 | } | |
218deb69 MD |
1188 | case atype_array_nestable: |
1189 | { | |
1190 | struct ustctl_field *uf = &fields[*iter_output]; | |
1191 | struct ustctl_type *ut = &uf->type; | |
1192 | ||
1193 | if (field_name) { | |
1194 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1195 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1196 | } else { | |
1197 | uf->name[0] = '\0'; | |
1198 | } | |
1199 | ut->atype = ustctl_atype_array_nestable; | |
1200 | ut->u.array_nestable.length = lt->u.array_nestable.length; | |
1201 | ut->u.array_nestable.alignment = lt->u.array_nestable.alignment; | |
1202 | (*iter_output)++; | |
1203 | ||
1204 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1205 | lt->u.array_nestable.elem_type); | |
1206 | if (ret) | |
1207 | return -EINVAL; | |
1208 | break; | |
1209 | } | |
32ce8569 MD |
1210 | case atype_sequence: |
1211 | { | |
53569322 MD |
1212 | struct ustctl_field *uf = &fields[*iter_output]; |
1213 | struct ustctl_type *ut = &uf->type; | |
32ce8569 MD |
1214 | struct ustctl_basic_type *ubt; |
1215 | const struct lttng_basic_type *lbt; | |
973eac63 | 1216 | enum ustctl_abstract_types atype; |
32ce8569 | 1217 | |
218deb69 MD |
1218 | if (field_name) { |
1219 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1220 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1221 | } else { | |
1222 | uf->name[0] = '\0'; | |
1223 | } | |
53569322 | 1224 | uf->type.atype = ustctl_atype_sequence; |
218deb69 MD |
1225 | ubt = &ut->u.legacy.sequence.length_type; |
1226 | lbt = <->u.legacy.sequence.length_type; | |
973eac63 | 1227 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1228 | &ubt->u.basic, &lbt->u.basic); |
1229 | if (ret) | |
1230 | return -EINVAL; | |
973eac63 | 1231 | ubt->atype = atype; |
218deb69 MD |
1232 | ubt = &ut->u.legacy.sequence.elem_type; |
1233 | lbt = <->u.legacy.sequence.elem_type; | |
973eac63 | 1234 | ret = serialize_basic_type(session, &atype, lbt->atype, |
32ce8569 MD |
1235 | &ubt->u.basic, &lbt->u.basic); |
1236 | if (ret) | |
1237 | return -EINVAL; | |
973eac63 | 1238 | ubt->atype = atype; |
53569322 MD |
1239 | (*iter_output)++; |
1240 | break; | |
1241 | } | |
218deb69 MD |
1242 | case atype_sequence_nestable: |
1243 | { | |
1244 | struct ustctl_field *uf = &fields[*iter_output]; | |
1245 | struct ustctl_type *ut = &uf->type; | |
1246 | ||
1247 | if (field_name) { | |
1248 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1249 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1250 | } else { | |
1251 | uf->name[0] = '\0'; | |
1252 | } | |
1253 | ut->atype = ustctl_atype_sequence_nestable; | |
1254 | strncpy(ut->u.sequence_nestable.length_name, | |
1255 | lt->u.sequence_nestable.length_name, | |
1256 | LTTNG_UST_SYM_NAME_LEN); | |
1257 | ut->u.sequence_nestable.length_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1258 | ut->u.sequence_nestable.alignment = lt->u.sequence_nestable.alignment; | |
1259 | (*iter_output)++; | |
1260 | ||
1261 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1262 | lt->u.sequence_nestable.elem_type); | |
1263 | if (ret) | |
1264 | return -EINVAL; | |
1265 | break; | |
1266 | } | |
53569322 MD |
1267 | case atype_dynamic: |
1268 | { | |
218deb69 MD |
1269 | ret = serialize_dynamic_type(session, fields, iter_output, |
1270 | field_name); | |
53569322 MD |
1271 | if (ret) |
1272 | return -EINVAL; | |
1273 | break; | |
1274 | } | |
1275 | case atype_struct: | |
1276 | { | |
1277 | struct ustctl_field *uf = &fields[*iter_output]; | |
1278 | ||
218deb69 MD |
1279 | if (field_name) { |
1280 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1281 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1282 | } else { | |
1283 | uf->name[0] = '\0'; | |
53569322 | 1284 | } |
53569322 | 1285 | uf->type.atype = ustctl_atype_struct; |
218deb69 | 1286 | uf->type.u.legacy._struct.nr_fields = lt->u.legacy._struct.nr_fields; |
53569322 | 1287 | (*iter_output)++; |
218deb69 MD |
1288 | |
1289 | ret = serialize_fields(session, fields, iter_output, | |
1290 | lt->u.legacy._struct.nr_fields, | |
1291 | lt->u.legacy._struct.fields); | |
1292 | if (ret) | |
1293 | return -EINVAL; | |
1294 | break; | |
1295 | } | |
1296 | case atype_struct_nestable: | |
1297 | { | |
1298 | struct ustctl_field *uf = &fields[*iter_output]; | |
1299 | ||
1300 | if (field_name) { | |
1301 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1302 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1303 | } else { | |
1304 | uf->name[0] = '\0'; | |
1305 | } | |
1306 | uf->type.atype = ustctl_atype_struct_nestable; | |
1307 | uf->type.u.struct_nestable.nr_fields = lt->u.struct_nestable.nr_fields; | |
1308 | uf->type.u.struct_nestable.alignment = lt->u.struct_nestable.alignment; | |
1309 | (*iter_output)++; | |
1310 | ||
1311 | ret = serialize_fields(session, fields, iter_output, | |
1312 | lt->u.struct_nestable.nr_fields, | |
1313 | lt->u.struct_nestable.fields); | |
1314 | if (ret) | |
1315 | return -EINVAL; | |
1316 | break; | |
1317 | } | |
1318 | case atype_enum_nestable: | |
1319 | { | |
1320 | struct ustctl_field *uf = &fields[*iter_output]; | |
1321 | struct ustctl_type *ut = &uf->type; | |
1322 | ||
1323 | if (field_name) { | |
1324 | strncpy(uf->name, field_name, LTTNG_UST_SYM_NAME_LEN); | |
1325 | uf->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1326 | } else { | |
1327 | uf->name[0] = '\0'; | |
1328 | } | |
1329 | strncpy(ut->u.enum_nestable.name, lt->u.enum_nestable.desc->name, | |
1330 | LTTNG_UST_SYM_NAME_LEN); | |
1331 | ut->u.enum_nestable.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1332 | ut->atype = ustctl_atype_enum_nestable; | |
1333 | (*iter_output)++; | |
1334 | ||
1335 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
1336 | lt->u.enum_nestable.container_type); | |
1337 | if (ret) | |
1338 | return -EINVAL; | |
1339 | if (session) { | |
1340 | const struct lttng_enum *_enum; | |
1341 | ||
1342 | _enum = lttng_ust_enum_get_from_desc(session, lt->u.enum_nestable.desc); | |
1343 | if (!_enum) | |
1344 | return -EINVAL; | |
1345 | ut->u.enum_nestable.id = _enum->id; | |
1346 | } else { | |
1347 | ut->u.enum_nestable.id = -1ULL; | |
1348 | } | |
32ce8569 MD |
1349 | break; |
1350 | } | |
32ce8569 MD |
1351 | default: |
1352 | return -EINVAL; | |
1353 | } | |
1354 | return 0; | |
1355 | } | |
1356 | ||
218deb69 MD |
1357 | static |
1358 | int serialize_one_field(struct lttng_session *session, | |
1359 | struct ustctl_field *fields, size_t *iter_output, | |
1360 | const struct lttng_event_field *lf) | |
1361 | { | |
1362 | /* skip 'nowrite' fields */ | |
1363 | if (lf->nowrite) | |
1364 | return 0; | |
1365 | ||
1366 | return serialize_one_type(session, fields, iter_output, lf->name, &lf->type); | |
1367 | } | |
1368 | ||
32ce8569 | 1369 | static |
c785c634 | 1370 | int serialize_fields(struct lttng_session *session, |
218deb69 MD |
1371 | struct ustctl_field *ustctl_fields, |
1372 | size_t *iter_output, size_t nr_lttng_fields, | |
1373 | const struct lttng_event_field *lttng_fields) | |
1374 | { | |
1375 | int ret; | |
1376 | size_t i; | |
1377 | ||
1378 | for (i = 0; i < nr_lttng_fields; i++) { | |
1379 | ret = serialize_one_field(session, ustctl_fields, | |
1380 | iter_output, <tng_fields[i]); | |
1381 | if (ret) | |
1382 | return ret; | |
1383 | } | |
1384 | return 0; | |
1385 | } | |
1386 | ||
1387 | static | |
1388 | int alloc_serialize_fields(struct lttng_session *session, | |
c785c634 | 1389 | size_t *_nr_write_fields, |
32ce8569 MD |
1390 | struct ustctl_field **ustctl_fields, |
1391 | size_t nr_fields, | |
1392 | const struct lttng_event_field *lttng_fields) | |
1393 | { | |
1394 | struct ustctl_field *fields; | |
53569322 | 1395 | int ret; |
218deb69 | 1396 | size_t iter_output = 0; |
53569322 MD |
1397 | ssize_t nr_write_fields; |
1398 | ||
1399 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1400 | if (nr_write_fields < 0) { | |
1401 | return (int) nr_write_fields; | |
1402 | } | |
32ce8569 | 1403 | |
53569322 | 1404 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1405 | if (!fields) |
1406 | return -ENOMEM; | |
1407 | ||
218deb69 MD |
1408 | ret = serialize_fields(session, fields, &iter_output, nr_fields, |
1409 | lttng_fields); | |
1410 | if (ret) | |
1411 | goto error_type; | |
32ce8569 MD |
1412 | |
1413 | *_nr_write_fields = nr_write_fields; | |
1414 | *ustctl_fields = fields; | |
1415 | return 0; | |
1416 | ||
1417 | error_type: | |
1418 | free(fields); | |
1419 | return ret; | |
1420 | } | |
1421 | ||
c785c634 MD |
1422 | static |
1423 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1424 | size_t nr_entries, | |
1425 | const struct lttng_enum_entry *lttng_entries) | |
1426 | { | |
1427 | struct ustctl_enum_entry *entries; | |
1428 | int i; | |
1429 | ||
1430 | /* Serialize the entries */ | |
1431 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1432 | if (!entries) | |
1433 | return -ENOMEM; | |
1434 | for (i = 0; i < nr_entries; i++) { | |
1435 | struct ustctl_enum_entry *uentry; | |
1436 | const struct lttng_enum_entry *lentry; | |
1437 | ||
1438 | uentry = &entries[i]; | |
1439 | lentry = <tng_entries[i]; | |
1440 | ||
a6f80644 MD |
1441 | uentry->start.value = lentry->start.value; |
1442 | uentry->start.signedness = lentry->start.signedness; | |
1443 | uentry->end.value = lentry->end.value; | |
1444 | uentry->end.signedness = lentry->end.signedness; | |
c785c634 MD |
1445 | strncpy(uentry->string, lentry->string, LTTNG_UST_SYM_NAME_LEN); |
1446 | uentry->string[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 PP |
1447 | |
1448 | if (lentry->u.extra.options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { | |
1449 | uentry->u.extra.options |= | |
1450 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1451 | } | |
c785c634 MD |
1452 | } |
1453 | *_entries = entries; | |
1454 | return 0; | |
1455 | } | |
1456 | ||
83e43212 | 1457 | static |
53569322 MD |
1458 | int serialize_ctx_fields(struct lttng_session *session, |
1459 | size_t *_nr_write_fields, | |
83e43212 MD |
1460 | struct ustctl_field **ustctl_fields, |
1461 | size_t nr_fields, | |
1462 | const struct lttng_ctx_field *lttng_fields) | |
1463 | { | |
1464 | struct ustctl_field *fields; | |
53569322 MD |
1465 | int ret; |
1466 | size_t i, iter_output = 0; | |
1467 | ssize_t nr_write_fields; | |
83e43212 | 1468 | |
53569322 MD |
1469 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1470 | lttng_fields); | |
1471 | if (nr_write_fields < 0) { | |
1472 | return (int) nr_write_fields; | |
1473 | } | |
1474 | ||
1475 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1476 | if (!fields) |
1477 | return -ENOMEM; | |
1478 | ||
1479 | for (i = 0; i < nr_fields; i++) { | |
53569322 MD |
1480 | ret = serialize_one_field(session, fields, &iter_output, |
1481 | <tng_fields[i].event_field); | |
83e43212 MD |
1482 | if (ret) |
1483 | goto error_type; | |
83e43212 MD |
1484 | } |
1485 | ||
1486 | *_nr_write_fields = nr_write_fields; | |
1487 | *ustctl_fields = fields; | |
1488 | return 0; | |
1489 | ||
1490 | error_type: | |
1491 | free(fields); | |
1492 | return ret; | |
1493 | } | |
1494 | ||
32ce8569 MD |
1495 | /* |
1496 | * Returns 0 on success, negative error value on error. | |
1497 | */ | |
1498 | int ustcomm_register_event(int sock, | |
c785c634 | 1499 | struct lttng_session *session, |
32ce8569 MD |
1500 | int session_objd, /* session descriptor */ |
1501 | int channel_objd, /* channel descriptor */ | |
1502 | const char *event_name, /* event name (input) */ | |
1503 | int loglevel, | |
1504 | const char *signature, /* event signature (input) */ | |
1505 | size_t nr_fields, /* fields */ | |
1506 | const struct lttng_event_field *lttng_fields, | |
1507 | const char *model_emf_uri, | |
bb84a1ec MD |
1508 | uint64_t user_token, |
1509 | uint32_t *event_id, /* event id (output) */ | |
1510 | uint64_t *counter_index) /* counter index (output) */ | |
32ce8569 MD |
1511 | { |
1512 | ssize_t len; | |
1513 | struct { | |
1514 | struct ustcomm_notify_hdr header; | |
1515 | struct ustcomm_notify_event_msg m; | |
1516 | } msg; | |
1517 | struct { | |
1518 | struct ustcomm_notify_hdr header; | |
1519 | struct ustcomm_notify_event_reply r; | |
1520 | } reply; | |
1521 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1522 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1523 | size_t nr_write_fields = 0; |
1524 | int ret; | |
1525 | ||
1526 | memset(&msg, 0, sizeof(msg)); | |
1527 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1528 | msg.m.session_objd = session_objd; | |
1529 | msg.m.channel_objd = channel_objd; | |
1530 | strncpy(msg.m.event_name, event_name, LTTNG_UST_SYM_NAME_LEN); | |
1531 | msg.m.event_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1532 | msg.m.loglevel = loglevel; | |
bb84a1ec | 1533 | msg.m.user_token = user_token; |
32ce8569 MD |
1534 | signature_len = strlen(signature) + 1; |
1535 | msg.m.signature_len = signature_len; | |
1536 | ||
1537 | /* Calculate fields len, serialize fields. */ | |
1538 | if (nr_fields > 0) { | |
218deb69 | 1539 | ret = alloc_serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1540 | nr_fields, lttng_fields); |
1541 | if (ret) | |
1542 | return ret; | |
1543 | } | |
1544 | ||
1545 | fields_len = sizeof(*fields) * nr_write_fields; | |
1546 | msg.m.fields_len = fields_len; | |
1547 | if (model_emf_uri) { | |
1548 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1549 | } else { | |
1550 | model_emf_uri_len = 0; | |
1551 | } | |
1552 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1553 | |
32ce8569 MD |
1554 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1555 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1556 | ret = -EIO; |
1557 | goto error_fields; | |
32ce8569 MD |
1558 | } |
1559 | if (len < 0) { | |
c785c634 MD |
1560 | ret = len; |
1561 | goto error_fields; | |
32ce8569 MD |
1562 | } |
1563 | ||
1564 | /* send signature */ | |
1565 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1566 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1567 | ret = -EIO; |
1568 | goto error_fields; | |
32ce8569 MD |
1569 | } |
1570 | if (len < 0) { | |
6b95617c MD |
1571 | ret = len; |
1572 | goto error_fields; | |
32ce8569 MD |
1573 | } |
1574 | ||
1575 | /* send fields */ | |
1576 | if (fields_len > 0) { | |
1577 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1578 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1579 | ret = -EIO; |
1580 | goto error_fields; | |
32ce8569 MD |
1581 | } |
1582 | if (len < 0) { | |
c785c634 MD |
1583 | ret = len; |
1584 | goto error_fields; | |
32ce8569 MD |
1585 | } |
1586 | } | |
6b95617c | 1587 | free(fields); |
32ce8569 MD |
1588 | |
1589 | if (model_emf_uri_len) { | |
1590 | /* send model_emf_uri */ | |
1591 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1592 | model_emf_uri_len); | |
c785c634 | 1593 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1594 | return -EIO; |
c785c634 MD |
1595 | } |
1596 | if (len < 0) { | |
6b95617c | 1597 | return len; |
c785c634 | 1598 | } |
32ce8569 MD |
1599 | } |
1600 | ||
1601 | /* receive reply */ | |
1602 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1603 | switch (len) { | |
1604 | case 0: /* orderly shutdown */ | |
1605 | return -EPIPE; | |
1606 | case sizeof(reply): | |
1607 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1608 | ERR("Unexpected result message command " | |
1609 | "expected: %u vs received: %u\n", | |
1610 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1611 | return -EINVAL; | |
1612 | } | |
1613 | if (reply.r.ret_code > 0) | |
1614 | return -EINVAL; | |
1615 | if (reply.r.ret_code < 0) | |
1616 | return reply.r.ret_code; | |
bb84a1ec MD |
1617 | *event_id = reply.r.event_id; |
1618 | *counter_index = reply.r.counter_index; | |
1619 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u, counter_index %" PRIu64 "\n", | |
1620 | event_name, reply.r.ret_code, reply.r.event_id, reply.r.counter_index); | |
32ce8569 MD |
1621 | return 0; |
1622 | default: | |
1623 | if (len < 0) { | |
1624 | /* Transport level error */ | |
1625 | if (errno == EPIPE || errno == ECONNRESET) | |
1626 | len = -errno; | |
1627 | return len; | |
1628 | } else { | |
1629 | ERR("incorrect message size: %zd\n", len); | |
1630 | return len; | |
1631 | } | |
1632 | } | |
6b95617c | 1633 | /* Unreached. */ |
c785c634 | 1634 | |
6b95617c | 1635 | /* Error path only. */ |
c785c634 MD |
1636 | error_fields: |
1637 | free(fields); | |
1638 | return ret; | |
1639 | } | |
1640 | ||
1641 | /* | |
1642 | * Returns 0 on success, negative error value on error. | |
1643 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1644 | */ | |
1645 | int ustcomm_register_enum(int sock, | |
1646 | int session_objd, /* session descriptor */ | |
1647 | const char *enum_name, /* enum name (input) */ | |
1648 | size_t nr_entries, /* entries */ | |
1649 | const struct lttng_enum_entry *lttng_entries, | |
1650 | uint64_t *id) | |
1651 | { | |
1652 | ssize_t len; | |
1653 | struct { | |
1654 | struct ustcomm_notify_hdr header; | |
1655 | struct ustcomm_notify_enum_msg m; | |
1656 | } msg; | |
1657 | struct { | |
1658 | struct ustcomm_notify_hdr header; | |
1659 | struct ustcomm_notify_enum_reply r; | |
1660 | } reply; | |
1661 | size_t entries_len; | |
1662 | struct ustctl_enum_entry *entries = NULL; | |
1663 | int ret; | |
1664 | ||
1665 | memset(&msg, 0, sizeof(msg)); | |
1666 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1667 | msg.m.session_objd = session_objd; | |
1668 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_SYM_NAME_LEN); | |
1669 | msg.m.enum_name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
1670 | ||
1671 | /* Calculate entries len, serialize entries. */ | |
1672 | if (nr_entries > 0) { | |
1673 | ret = serialize_entries(&entries, | |
1674 | nr_entries, lttng_entries); | |
1675 | if (ret) | |
1676 | return ret; | |
1677 | } | |
1678 | ||
1679 | entries_len = sizeof(*entries) * nr_entries; | |
1680 | msg.m.entries_len = entries_len; | |
1681 | ||
1682 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1683 | if (len > 0 && len != sizeof(msg)) { | |
1684 | ret = -EIO; | |
1685 | goto error_entries; | |
1686 | } | |
1687 | if (len < 0) { | |
1688 | ret = len; | |
1689 | goto error_entries; | |
1690 | } | |
1691 | ||
1692 | /* send entries */ | |
1693 | if (entries_len > 0) { | |
1694 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1695 | if (len > 0 && len != entries_len) { | |
1696 | ret = -EIO; | |
1697 | goto error_entries; | |
1698 | } | |
1699 | if (len < 0) { | |
1700 | ret = len; | |
1701 | goto error_entries; | |
1702 | } | |
1703 | } | |
1704 | free(entries); | |
1705 | entries = NULL; | |
1706 | ||
1707 | /* receive reply */ | |
1708 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1709 | switch (len) { | |
1710 | case 0: /* orderly shutdown */ | |
1711 | return -EPIPE; | |
1712 | case sizeof(reply): | |
1713 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1714 | ERR("Unexpected result message command " | |
1715 | "expected: %u vs received: %u\n", | |
1716 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1717 | return -EINVAL; | |
1718 | } | |
1719 | if (reply.r.ret_code > 0) | |
1720 | return -EINVAL; | |
1721 | if (reply.r.ret_code < 0) | |
1722 | return reply.r.ret_code; | |
1723 | *id = reply.r.enum_id; | |
1724 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1725 | enum_name, reply.r.ret_code); | |
1726 | return 0; | |
1727 | default: | |
1728 | if (len < 0) { | |
1729 | /* Transport level error */ | |
1730 | if (errno == EPIPE || errno == ECONNRESET) | |
1731 | len = -errno; | |
1732 | return len; | |
1733 | } else { | |
1734 | ERR("incorrect message size: %zd\n", len); | |
1735 | return len; | |
1736 | } | |
1737 | } | |
1738 | return ret; | |
1739 | ||
1740 | error_entries: | |
1741 | free(entries); | |
1742 | return ret; | |
32ce8569 MD |
1743 | } |
1744 | ||
1745 | /* | |
1746 | * Returns 0 on success, negative error value on error. | |
1747 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1748 | */ | |
1749 | int ustcomm_register_channel(int sock, | |
53569322 | 1750 | struct lttng_session *session, |
32ce8569 MD |
1751 | int session_objd, /* session descriptor */ |
1752 | int channel_objd, /* channel descriptor */ | |
1753 | size_t nr_ctx_fields, | |
83e43212 | 1754 | const struct lttng_ctx_field *ctx_fields, |
32ce8569 MD |
1755 | uint32_t *chan_id, /* channel id (output) */ |
1756 | int *header_type) /* header type (output) */ | |
1757 | { | |
1758 | ssize_t len; | |
1759 | struct { | |
1760 | struct ustcomm_notify_hdr header; | |
1761 | struct ustcomm_notify_channel_msg m; | |
1762 | } msg; | |
1763 | struct { | |
1764 | struct ustcomm_notify_hdr header; | |
1765 | struct ustcomm_notify_channel_reply r; | |
1766 | } reply; | |
1767 | size_t fields_len; | |
83e43212 | 1768 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1769 | int ret; |
1770 | size_t nr_write_fields = 0; | |
1771 | ||
1772 | memset(&msg, 0, sizeof(msg)); | |
1773 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1774 | msg.m.session_objd = session_objd; | |
1775 | msg.m.channel_objd = channel_objd; | |
1776 | ||
1777 | /* Calculate fields len, serialize fields. */ | |
1778 | if (nr_ctx_fields > 0) { | |
53569322 | 1779 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1780 | nr_ctx_fields, ctx_fields); |
1781 | if (ret) | |
1782 | return ret; | |
1783 | } | |
1784 | ||
1785 | fields_len = sizeof(*fields) * nr_write_fields; | |
1786 | msg.m.ctx_fields_len = fields_len; | |
1787 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1788 | if (len > 0 && len != sizeof(msg)) { | |
1789 | free(fields); | |
1790 | return -EIO; | |
1791 | } | |
1792 | if (len < 0) { | |
1793 | free(fields); | |
1794 | return len; | |
1795 | } | |
1796 | ||
1797 | /* send fields */ | |
1798 | if (fields_len > 0) { | |
1799 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1800 | free(fields); | |
1801 | if (len > 0 && len != fields_len) { | |
1802 | return -EIO; | |
1803 | } | |
1804 | if (len < 0) { | |
1805 | return len; | |
1806 | } | |
17ea789c MD |
1807 | } else { |
1808 | free(fields); | |
32ce8569 MD |
1809 | } |
1810 | ||
1811 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1812 | switch (len) { | |
1813 | case 0: /* orderly shutdown */ | |
1814 | return -EPIPE; | |
1815 | case sizeof(reply): | |
1816 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1817 | ERR("Unexpected result message command " | |
1818 | "expected: %u vs received: %u\n", | |
1819 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1820 | return -EINVAL; | |
1821 | } | |
1822 | if (reply.r.ret_code > 0) | |
1823 | return -EINVAL; | |
1824 | if (reply.r.ret_code < 0) | |
1825 | return reply.r.ret_code; | |
1826 | *chan_id = reply.r.chan_id; | |
1827 | switch (reply.r.header_type) { | |
1828 | case 1: | |
1829 | case 2: | |
1830 | *header_type = reply.r.header_type; | |
1831 | break; | |
1832 | default: | |
1833 | ERR("Unexpected channel header type %u\n", | |
1834 | reply.r.header_type); | |
1835 | return -EINVAL; | |
1836 | } | |
1837 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1838 | reply.r.chan_id, reply.r.header_type); | |
1839 | return 0; | |
1840 | default: | |
1841 | if (len < 0) { | |
1842 | /* Transport level error */ | |
1843 | if (errno == EPIPE || errno == ECONNRESET) | |
1844 | len = -errno; | |
1845 | return len; | |
1846 | } else { | |
1847 | ERR("incorrect message size: %zd\n", len); | |
1848 | return len; | |
1849 | } | |
1850 | } | |
1851 | } | |
ff517991 MD |
1852 | |
1853 | /* | |
1854 | * Set socket reciving timeout. | |
1855 | */ | |
1856 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1857 | { | |
1858 | int ret; | |
1859 | struct timeval tv; | |
1860 | ||
1861 | tv.tv_sec = msec / 1000; | |
1862 | tv.tv_usec = (msec * 1000 % 1000000); | |
1863 | ||
1864 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1865 | if (ret < 0) { | |
1866 | PERROR("setsockopt SO_RCVTIMEO"); | |
1867 | ret = -errno; | |
1868 | } | |
1869 | ||
1870 | return ret; | |
1871 | } | |
1872 | ||
1873 | /* | |
1874 | * Set socket sending timeout. | |
1875 | */ | |
1876 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1877 | { | |
1878 | int ret; | |
1879 | struct timeval tv; | |
1880 | ||
1881 | tv.tv_sec = msec / 1000; | |
1882 | tv.tv_usec = (msec * 1000) % 1000000; | |
1883 | ||
1884 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1885 | if (ret < 0) { | |
1886 | PERROR("setsockopt SO_SNDTIMEO"); | |
1887 | ret = -errno; | |
1888 | } | |
1889 | ||
1890 | return ret; | |
1891 | } |