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> |
ae4b659d | 27 | #include <ust-dynamic-type.h> |
32ce8569 MD |
28 | #include <usterr-signal-safe.h> |
29 | ||
7753d283 | 30 | #include "../liblttng-ust/ust-events-internal.h" |
32ce8569 | 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, | |
a084756d | 40 | struct lttng_ust_event_field **lttng_fields); |
53569322 | 41 | static |
f69fe5fb | 42 | int serialize_one_field(struct lttng_ust_session *session, |
53569322 | 43 | struct ustctl_field *fields, size_t *iter_output, |
a084756d | 44 | struct lttng_ust_event_field *lf); |
218deb69 | 45 | static |
f69fe5fb | 46 | int serialize_fields(struct lttng_ust_session *session, |
218deb69 MD |
47 | struct ustctl_field *ustctl_fields, |
48 | size_t *iter_output, size_t nr_lttng_fields, | |
a084756d | 49 | struct lttng_ust_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 | |
fd17d7ce | 609 | if (var_len > LTTNG_UST_ABI_CHANNEL_DATA_MAX_LEN) { |
74d81a6c MD |
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 | ||
fd17d7ce | 764 | if (var_len > LTTNG_UST_ABI_COUNTER_DATA_MAX_LEN) { |
ebabbf58 MD |
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 | ||
fd17d7ce | 842 | reg_msg.magic = LTTNG_UST_ABI_COMM_MAGIC; |
32ce8569 MD |
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 | 867 | static |
a084756d | 868 | ssize_t count_one_type(struct lttng_ust_type_common *lt) |
53569322 | 869 | { |
a084756d MD |
870 | switch (lt->type) { |
871 | case lttng_ust_type_integer: | |
872 | case lttng_ust_type_float: | |
873 | case lttng_ust_type_string: | |
53569322 | 874 | return 1; |
a084756d MD |
875 | case lttng_ust_type_enum: |
876 | return count_one_type(lttng_ust_get_type_enum(lt)->container_type) + 1; | |
877 | case lttng_ust_type_array: | |
878 | return count_one_type(lttng_ust_get_type_array(lt)->elem_type) + 1; | |
879 | case lttng_ust_type_sequence: | |
880 | return count_one_type(lttng_ust_get_type_sequence(lt)->elem_type) + 1; | |
881 | case lttng_ust_type_struct: | |
882 | return count_fields_recursive(lttng_ust_get_type_struct(lt)->nr_fields, | |
883 | lttng_ust_get_type_struct(lt)->fields) + 1; | |
884 | ||
885 | case lttng_ust_type_dynamic: | |
53569322 | 886 | { |
a084756d | 887 | struct lttng_ust_event_field **choices; |
53569322 MD |
888 | size_t nr_choices; |
889 | int ret; | |
890 | ||
891 | ret = lttng_ust_dynamic_type_choices(&nr_choices, | |
892 | &choices); | |
893 | if (ret) | |
894 | return ret; | |
895 | /* | |
cf22367f | 896 | * Two fields for enum, one field for variant, and |
53569322 MD |
897 | * one field per choice. |
898 | */ | |
cf22367f | 899 | return count_fields_recursive(nr_choices, choices) + 3; |
53569322 | 900 | } |
218deb69 | 901 | |
53569322 MD |
902 | default: |
903 | return -EINVAL; | |
904 | } | |
905 | return 0; | |
906 | } | |
907 | ||
908 | static | |
909 | ssize_t count_fields_recursive(size_t nr_fields, | |
a084756d | 910 | struct lttng_ust_event_field **lttng_fields) |
53569322 MD |
911 | { |
912 | int i; | |
913 | ssize_t ret, count = 0; | |
914 | ||
915 | for (i = 0; i < nr_fields; i++) { | |
25cff019 | 916 | const struct lttng_ust_event_field *lf; |
53569322 | 917 | |
25cff019 | 918 | lf = lttng_fields[i]; |
53569322 MD |
919 | /* skip 'nowrite' fields */ |
920 | if (lf->nowrite) | |
921 | continue; | |
a084756d | 922 | ret = count_one_type(lf->type); |
53569322 MD |
923 | if (ret < 0) |
924 | return ret; /* error */ | |
925 | count += ret; | |
926 | } | |
927 | return count; | |
928 | } | |
929 | ||
930 | static | |
931 | ssize_t count_ctx_fields_recursive(size_t nr_fields, | |
daacdbfc | 932 | struct lttng_ust_ctx_field **lttng_fields) |
53569322 MD |
933 | { |
934 | int i; | |
935 | ssize_t ret, count = 0; | |
936 | ||
937 | for (i = 0; i < nr_fields; i++) { | |
25cff019 | 938 | const struct lttng_ust_event_field *lf; |
53569322 | 939 | |
daacdbfc | 940 | lf = lttng_fields[i]->event_field; |
53569322 MD |
941 | /* skip 'nowrite' fields */ |
942 | if (lf->nowrite) | |
943 | continue; | |
a084756d | 944 | ret = count_one_type(lf->type); |
53569322 MD |
945 | if (ret < 0) |
946 | return ret; /* error */ | |
947 | count += ret; | |
948 | } | |
949 | return count; | |
950 | } | |
951 | ||
31a85ea9 MD |
952 | static |
953 | int serialize_string_encoding(int32_t *ue, | |
a084756d | 954 | enum lttng_ust_string_encoding le) |
31a85ea9 MD |
955 | { |
956 | switch (le) { | |
a084756d | 957 | case lttng_ust_string_encoding_none: |
31a85ea9 MD |
958 | *ue = ustctl_encode_none; |
959 | break; | |
a084756d | 960 | case lttng_ust_string_encoding_UTF8: |
31a85ea9 MD |
961 | *ue = ustctl_encode_UTF8; |
962 | break; | |
a084756d | 963 | case lttng_ust_string_encoding_ASCII: |
31a85ea9 MD |
964 | *ue = ustctl_encode_ASCII; |
965 | break; | |
966 | default: | |
967 | return -EINVAL; | |
968 | } | |
969 | return 0; | |
970 | } | |
971 | ||
972 | static | |
973 | int serialize_integer_type(struct ustctl_integer_type *uit, | |
a084756d MD |
974 | const struct lttng_ust_type_integer *lit, |
975 | enum lttng_ust_string_encoding lencoding) | |
31a85ea9 MD |
976 | { |
977 | int32_t encoding; | |
978 | ||
979 | uit->size = lit->size; | |
980 | uit->signedness = lit->signedness; | |
981 | uit->reverse_byte_order = lit->reverse_byte_order; | |
982 | uit->base = lit->base; | |
a084756d | 983 | if (serialize_string_encoding(&encoding, lencoding)) |
31a85ea9 MD |
984 | return -EINVAL; |
985 | uit->encoding = encoding; | |
986 | uit->alignment = lit->alignment; | |
987 | return 0; | |
988 | } | |
989 | ||
32ce8569 | 990 | static |
f69fe5fb | 991 | int serialize_dynamic_type(struct lttng_ust_session *session, |
53569322 | 992 | struct ustctl_field *fields, size_t *iter_output, |
218deb69 | 993 | const char *field_name) |
32ce8569 | 994 | { |
a084756d | 995 | struct lttng_ust_event_field **choices; |
fd17d7ce | 996 | char tag_field_name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
a084756d MD |
997 | struct lttng_ust_type_common *tag_type; |
998 | struct lttng_ust_event_field *tag_field_generic; | |
25cff019 | 999 | struct lttng_ust_event_field tag_field = { |
53569322 MD |
1000 | .name = tag_field_name, |
1001 | .nowrite = 0, | |
1002 | }; | |
1003 | struct ustctl_field *uf; | |
1004 | size_t nr_choices, i; | |
32ce8569 MD |
1005 | int ret; |
1006 | ||
53569322 | 1007 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); |
a084756d | 1008 | tag_type = tag_field_generic->type; |
53569322 MD |
1009 | |
1010 | /* Serialize enum field. */ | |
fd17d7ce MD |
1011 | strncpy(tag_field_name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1012 | tag_field_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
53569322 MD |
1013 | strncat(tag_field_name, |
1014 | "_tag", | |
fd17d7ce | 1015 | LTTNG_UST_ABI_SYM_NAME_LEN - strlen(tag_field_name) - 1); |
a084756d | 1016 | tag_field.type = tag_type; |
53569322 MD |
1017 | ret = serialize_one_field(session, fields, iter_output, |
1018 | &tag_field); | |
1019 | if (ret) | |
1020 | return ret; | |
1021 | ||
1022 | /* Serialize variant field. */ | |
1023 | uf = &fields[*iter_output]; | |
1024 | ret = lttng_ust_dynamic_type_choices(&nr_choices, &choices); | |
1025 | if (ret) | |
1026 | return ret; | |
1027 | ||
fd17d7ce MD |
1028 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1029 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
53569322 | 1030 | uf->type.atype = ustctl_atype_variant; |
218deb69 MD |
1031 | uf->type.u.variant_nestable.nr_choices = nr_choices; |
1032 | strncpy(uf->type.u.variant_nestable.tag_name, | |
53569322 | 1033 | tag_field_name, |
fd17d7ce MD |
1034 | LTTNG_UST_ABI_SYM_NAME_LEN); |
1035 | uf->type.u.variant_nestable.tag_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 | 1036 | uf->type.u.variant_nestable.alignment = 0; |
53569322 MD |
1037 | (*iter_output)++; |
1038 | ||
1039 | /* Serialize choice fields after variant. */ | |
1040 | for (i = 0; i < nr_choices; i++) { | |
1041 | ret = serialize_one_field(session, fields, | |
25cff019 | 1042 | iter_output, choices[i]); |
53569322 MD |
1043 | if (ret) |
1044 | return ret; | |
1045 | } | |
1046 | return 0; | |
1047 | } | |
1048 | ||
1049 | static | |
f69fe5fb | 1050 | int serialize_one_type(struct lttng_ust_session *session, |
53569322 | 1051 | struct ustctl_field *fields, size_t *iter_output, |
a084756d MD |
1052 | const char *field_name, struct lttng_ust_type_common *lt, |
1053 | enum lttng_ust_string_encoding parent_encoding) | |
53569322 | 1054 | { |
53569322 MD |
1055 | int ret; |
1056 | ||
218deb69 MD |
1057 | /* |
1058 | * Serializing a type (rather than a field) generates a ustctl_field | |
1059 | * entry with 0-length name. | |
1060 | */ | |
53569322 | 1061 | |
a084756d MD |
1062 | switch (lt->type) { |
1063 | case lttng_ust_type_integer: | |
31a85ea9 MD |
1064 | { |
1065 | struct ustctl_field *uf = &fields[*iter_output]; | |
1066 | struct ustctl_type *ut = &uf->type; | |
1067 | ||
1068 | if (field_name) { | |
fd17d7ce MD |
1069 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1070 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1071 | } else { |
1072 | uf->name[0] = '\0'; | |
1073 | } | |
a084756d MD |
1074 | ret = serialize_integer_type(&ut->u.integer, lttng_ust_get_type_integer(lt), |
1075 | parent_encoding); | |
31a85ea9 MD |
1076 | if (ret) |
1077 | return ret; | |
1078 | ut->atype = ustctl_atype_integer; | |
1079 | (*iter_output)++; | |
1080 | break; | |
1081 | } | |
a084756d | 1082 | case lttng_ust_type_float: |
31a85ea9 MD |
1083 | { |
1084 | struct ustctl_field *uf = &fields[*iter_output]; | |
1085 | struct ustctl_type *ut = &uf->type; | |
1086 | struct ustctl_float_type *uft; | |
a084756d | 1087 | struct lttng_ust_type_float *lft; |
31a85ea9 MD |
1088 | |
1089 | if (field_name) { | |
fd17d7ce MD |
1090 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1091 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1092 | } else { |
1093 | uf->name[0] = '\0'; | |
1094 | } | |
1095 | uft = &ut->u._float; | |
a084756d | 1096 | lft = lttng_ust_get_type_float(lt); |
31a85ea9 MD |
1097 | uft->exp_dig = lft->exp_dig; |
1098 | uft->mant_dig = lft->mant_dig; | |
1099 | uft->alignment = lft->alignment; | |
1100 | uft->reverse_byte_order = lft->reverse_byte_order; | |
1101 | ut->atype = ustctl_atype_float; | |
1102 | (*iter_output)++; | |
1103 | break; | |
1104 | } | |
a084756d | 1105 | case lttng_ust_type_string: |
31a85ea9 MD |
1106 | { |
1107 | struct ustctl_field *uf = &fields[*iter_output]; | |
1108 | struct ustctl_type *ut = &uf->type; | |
1109 | int32_t encoding; | |
1110 | ||
1111 | if (field_name) { | |
fd17d7ce MD |
1112 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1113 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
31a85ea9 MD |
1114 | } else { |
1115 | uf->name[0] = '\0'; | |
1116 | } | |
a084756d | 1117 | ret = serialize_string_encoding(&encoding, lttng_ust_get_type_string(lt)->encoding); |
31a85ea9 MD |
1118 | if (ret) |
1119 | return ret; | |
1120 | ut->u.string.encoding = encoding; | |
1121 | ut->atype = ustctl_atype_string; | |
1122 | (*iter_output)++; | |
1123 | break; | |
1124 | } | |
a084756d | 1125 | case lttng_ust_type_array: |
218deb69 MD |
1126 | { |
1127 | struct ustctl_field *uf = &fields[*iter_output]; | |
1128 | struct ustctl_type *ut = &uf->type; | |
1129 | ||
1130 | if (field_name) { | |
fd17d7ce MD |
1131 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1132 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1133 | } else { |
1134 | uf->name[0] = '\0'; | |
1135 | } | |
1136 | ut->atype = ustctl_atype_array_nestable; | |
a084756d MD |
1137 | ut->u.array_nestable.length = lttng_ust_get_type_array(lt)->length; |
1138 | ut->u.array_nestable.alignment = lttng_ust_get_type_array(lt)->alignment; | |
218deb69 MD |
1139 | (*iter_output)++; |
1140 | ||
1141 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d MD |
1142 | lttng_ust_get_type_array(lt)->elem_type, |
1143 | lttng_ust_get_type_array(lt)->encoding); | |
218deb69 MD |
1144 | if (ret) |
1145 | return -EINVAL; | |
1146 | break; | |
1147 | } | |
a084756d | 1148 | case lttng_ust_type_sequence: |
218deb69 MD |
1149 | { |
1150 | struct ustctl_field *uf = &fields[*iter_output]; | |
1151 | struct ustctl_type *ut = &uf->type; | |
1152 | ||
1153 | if (field_name) { | |
fd17d7ce MD |
1154 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1155 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1156 | } else { |
1157 | uf->name[0] = '\0'; | |
1158 | } | |
1159 | ut->atype = ustctl_atype_sequence_nestable; | |
1160 | strncpy(ut->u.sequence_nestable.length_name, | |
a084756d | 1161 | lttng_ust_get_type_sequence(lt)->length_name, |
fd17d7ce MD |
1162 | LTTNG_UST_ABI_SYM_NAME_LEN); |
1163 | ut->u.sequence_nestable.length_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
a084756d | 1164 | ut->u.sequence_nestable.alignment = lttng_ust_get_type_sequence(lt)->alignment; |
218deb69 MD |
1165 | (*iter_output)++; |
1166 | ||
1167 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d MD |
1168 | lttng_ust_get_type_sequence(lt)->elem_type, |
1169 | lttng_ust_get_type_sequence(lt)->encoding); | |
218deb69 MD |
1170 | if (ret) |
1171 | return -EINVAL; | |
1172 | break; | |
1173 | } | |
a084756d | 1174 | case lttng_ust_type_dynamic: |
53569322 | 1175 | { |
218deb69 MD |
1176 | ret = serialize_dynamic_type(session, fields, iter_output, |
1177 | field_name); | |
53569322 MD |
1178 | if (ret) |
1179 | return -EINVAL; | |
1180 | break; | |
1181 | } | |
a084756d | 1182 | case lttng_ust_type_struct: |
218deb69 MD |
1183 | { |
1184 | struct ustctl_field *uf = &fields[*iter_output]; | |
1185 | ||
1186 | if (field_name) { | |
fd17d7ce MD |
1187 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1188 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1189 | } else { |
1190 | uf->name[0] = '\0'; | |
1191 | } | |
1192 | uf->type.atype = ustctl_atype_struct_nestable; | |
a084756d MD |
1193 | uf->type.u.struct_nestable.nr_fields = lttng_ust_get_type_struct(lt)->nr_fields; |
1194 | uf->type.u.struct_nestable.alignment = lttng_ust_get_type_struct(lt)->alignment; | |
218deb69 MD |
1195 | (*iter_output)++; |
1196 | ||
1197 | ret = serialize_fields(session, fields, iter_output, | |
a084756d MD |
1198 | lttng_ust_get_type_struct(lt)->nr_fields, |
1199 | lttng_ust_get_type_struct(lt)->fields); | |
218deb69 MD |
1200 | if (ret) |
1201 | return -EINVAL; | |
1202 | break; | |
1203 | } | |
a084756d | 1204 | case lttng_ust_type_enum: |
218deb69 MD |
1205 | { |
1206 | struct ustctl_field *uf = &fields[*iter_output]; | |
1207 | struct ustctl_type *ut = &uf->type; | |
1208 | ||
1209 | if (field_name) { | |
fd17d7ce MD |
1210 | strncpy(uf->name, field_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1211 | uf->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1212 | } else { |
1213 | uf->name[0] = '\0'; | |
1214 | } | |
a084756d | 1215 | strncpy(ut->u.enum_nestable.name, lttng_ust_get_type_enum(lt)->desc->name, |
fd17d7ce MD |
1216 | LTTNG_UST_ABI_SYM_NAME_LEN); |
1217 | ut->u.enum_nestable.name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
218deb69 MD |
1218 | ut->atype = ustctl_atype_enum_nestable; |
1219 | (*iter_output)++; | |
1220 | ||
1221 | ret = serialize_one_type(session, fields, iter_output, NULL, | |
a084756d MD |
1222 | lttng_ust_get_type_enum(lt)->container_type, |
1223 | lttng_ust_string_encoding_none); | |
218deb69 MD |
1224 | if (ret) |
1225 | return -EINVAL; | |
1226 | if (session) { | |
1227 | const struct lttng_enum *_enum; | |
1228 | ||
a084756d | 1229 | _enum = lttng_ust_enum_get_from_desc(session, lttng_ust_get_type_enum(lt)->desc); |
218deb69 MD |
1230 | if (!_enum) |
1231 | return -EINVAL; | |
1232 | ut->u.enum_nestable.id = _enum->id; | |
1233 | } else { | |
1234 | ut->u.enum_nestable.id = -1ULL; | |
1235 | } | |
32ce8569 MD |
1236 | break; |
1237 | } | |
32ce8569 MD |
1238 | default: |
1239 | return -EINVAL; | |
1240 | } | |
1241 | return 0; | |
1242 | } | |
1243 | ||
218deb69 | 1244 | static |
f69fe5fb | 1245 | int serialize_one_field(struct lttng_ust_session *session, |
218deb69 | 1246 | struct ustctl_field *fields, size_t *iter_output, |
a084756d | 1247 | struct lttng_ust_event_field *lf) |
218deb69 MD |
1248 | { |
1249 | /* skip 'nowrite' fields */ | |
1250 | if (lf->nowrite) | |
1251 | return 0; | |
1252 | ||
a084756d | 1253 | return serialize_one_type(session, fields, iter_output, lf->name, lf->type, lttng_ust_string_encoding_none); |
218deb69 MD |
1254 | } |
1255 | ||
32ce8569 | 1256 | static |
f69fe5fb | 1257 | int serialize_fields(struct lttng_ust_session *session, |
218deb69 MD |
1258 | struct ustctl_field *ustctl_fields, |
1259 | size_t *iter_output, size_t nr_lttng_fields, | |
a084756d | 1260 | struct lttng_ust_event_field **lttng_fields) |
218deb69 MD |
1261 | { |
1262 | int ret; | |
1263 | size_t i; | |
1264 | ||
1265 | for (i = 0; i < nr_lttng_fields; i++) { | |
1266 | ret = serialize_one_field(session, ustctl_fields, | |
25cff019 | 1267 | iter_output, lttng_fields[i]); |
218deb69 MD |
1268 | if (ret) |
1269 | return ret; | |
1270 | } | |
1271 | return 0; | |
1272 | } | |
1273 | ||
1274 | static | |
f69fe5fb | 1275 | int alloc_serialize_fields(struct lttng_ust_session *session, |
c785c634 | 1276 | size_t *_nr_write_fields, |
32ce8569 MD |
1277 | struct ustctl_field **ustctl_fields, |
1278 | size_t nr_fields, | |
a084756d | 1279 | struct lttng_ust_event_field **lttng_fields) |
32ce8569 MD |
1280 | { |
1281 | struct ustctl_field *fields; | |
53569322 | 1282 | int ret; |
218deb69 | 1283 | size_t iter_output = 0; |
53569322 MD |
1284 | ssize_t nr_write_fields; |
1285 | ||
1286 | nr_write_fields = count_fields_recursive(nr_fields, lttng_fields); | |
1287 | if (nr_write_fields < 0) { | |
1288 | return (int) nr_write_fields; | |
1289 | } | |
32ce8569 | 1290 | |
53569322 | 1291 | fields = zmalloc(nr_write_fields * sizeof(*fields)); |
32ce8569 MD |
1292 | if (!fields) |
1293 | return -ENOMEM; | |
1294 | ||
218deb69 MD |
1295 | ret = serialize_fields(session, fields, &iter_output, nr_fields, |
1296 | lttng_fields); | |
1297 | if (ret) | |
1298 | goto error_type; | |
32ce8569 MD |
1299 | |
1300 | *_nr_write_fields = nr_write_fields; | |
1301 | *ustctl_fields = fields; | |
1302 | return 0; | |
1303 | ||
1304 | error_type: | |
1305 | free(fields); | |
1306 | return ret; | |
1307 | } | |
1308 | ||
c785c634 MD |
1309 | static |
1310 | int serialize_entries(struct ustctl_enum_entry **_entries, | |
1311 | size_t nr_entries, | |
a084756d | 1312 | struct lttng_ust_enum_entry **lttng_entries) |
c785c634 MD |
1313 | { |
1314 | struct ustctl_enum_entry *entries; | |
1315 | int i; | |
1316 | ||
1317 | /* Serialize the entries */ | |
1318 | entries = zmalloc(nr_entries * sizeof(*entries)); | |
1319 | if (!entries) | |
1320 | return -ENOMEM; | |
1321 | for (i = 0; i < nr_entries; i++) { | |
1322 | struct ustctl_enum_entry *uentry; | |
891d6b55 | 1323 | const struct lttng_ust_enum_entry *lentry; |
c785c634 MD |
1324 | |
1325 | uentry = &entries[i]; | |
891d6b55 | 1326 | lentry = lttng_entries[i]; |
c785c634 | 1327 | |
a6f80644 MD |
1328 | uentry->start.value = lentry->start.value; |
1329 | uentry->start.signedness = lentry->start.signedness; | |
1330 | uentry->end.value = lentry->end.value; | |
1331 | uentry->end.signedness = lentry->end.signedness; | |
fd17d7ce MD |
1332 | strncpy(uentry->string, lentry->string, LTTNG_UST_ABI_SYM_NAME_LEN); |
1333 | uentry->string[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
3e762260 | 1334 | |
891d6b55 | 1335 | if (lentry->options & LTTNG_ENUM_ENTRY_OPTION_IS_AUTO) { |
3e762260 PP |
1336 | uentry->u.extra.options |= |
1337 | USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO; | |
1338 | } | |
c785c634 MD |
1339 | } |
1340 | *_entries = entries; | |
1341 | return 0; | |
1342 | } | |
1343 | ||
83e43212 | 1344 | static |
f69fe5fb | 1345 | int serialize_ctx_fields(struct lttng_ust_session *session, |
53569322 | 1346 | size_t *_nr_write_fields, |
83e43212 MD |
1347 | struct ustctl_field **ustctl_fields, |
1348 | size_t nr_fields, | |
daacdbfc | 1349 | struct lttng_ust_ctx_field **lttng_fields) |
83e43212 MD |
1350 | { |
1351 | struct ustctl_field *fields; | |
53569322 MD |
1352 | int ret; |
1353 | size_t i, iter_output = 0; | |
1354 | ssize_t nr_write_fields; | |
83e43212 | 1355 | |
53569322 MD |
1356 | nr_write_fields = count_ctx_fields_recursive(nr_fields, |
1357 | lttng_fields); | |
1358 | if (nr_write_fields < 0) { | |
1359 | return (int) nr_write_fields; | |
1360 | } | |
1361 | ||
1362 | fields = zmalloc(nr_write_fields * sizeof(*fields)); | |
83e43212 MD |
1363 | if (!fields) |
1364 | return -ENOMEM; | |
1365 | ||
1366 | for (i = 0; i < nr_fields; i++) { | |
53569322 | 1367 | ret = serialize_one_field(session, fields, &iter_output, |
daacdbfc | 1368 | lttng_fields[i]->event_field); |
83e43212 MD |
1369 | if (ret) |
1370 | goto error_type; | |
83e43212 MD |
1371 | } |
1372 | ||
1373 | *_nr_write_fields = nr_write_fields; | |
1374 | *ustctl_fields = fields; | |
1375 | return 0; | |
1376 | ||
1377 | error_type: | |
1378 | free(fields); | |
1379 | return ret; | |
1380 | } | |
1381 | ||
32ce8569 MD |
1382 | /* |
1383 | * Returns 0 on success, negative error value on error. | |
1384 | */ | |
1385 | int ustcomm_register_event(int sock, | |
f69fe5fb | 1386 | struct lttng_ust_session *session, |
32ce8569 MD |
1387 | int session_objd, /* session descriptor */ |
1388 | int channel_objd, /* channel descriptor */ | |
1389 | const char *event_name, /* event name (input) */ | |
1390 | int loglevel, | |
1391 | const char *signature, /* event signature (input) */ | |
1392 | size_t nr_fields, /* fields */ | |
a084756d | 1393 | struct lttng_ust_event_field **lttng_fields, |
32ce8569 MD |
1394 | const char *model_emf_uri, |
1395 | uint32_t *id) /* event id (output) */ | |
1396 | { | |
1397 | ssize_t len; | |
1398 | struct { | |
1399 | struct ustcomm_notify_hdr header; | |
1400 | struct ustcomm_notify_event_msg m; | |
1401 | } msg; | |
1402 | struct { | |
1403 | struct ustcomm_notify_hdr header; | |
1404 | struct ustcomm_notify_event_reply r; | |
1405 | } reply; | |
1406 | size_t signature_len, fields_len, model_emf_uri_len; | |
3bf32af0 | 1407 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1408 | size_t nr_write_fields = 0; |
1409 | int ret; | |
1410 | ||
1411 | memset(&msg, 0, sizeof(msg)); | |
1412 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_EVENT; | |
1413 | msg.m.session_objd = session_objd; | |
1414 | msg.m.channel_objd = channel_objd; | |
fd17d7ce MD |
1415 | strncpy(msg.m.event_name, event_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1416 | msg.m.event_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
32ce8569 MD |
1417 | msg.m.loglevel = loglevel; |
1418 | signature_len = strlen(signature) + 1; | |
1419 | msg.m.signature_len = signature_len; | |
1420 | ||
1421 | /* Calculate fields len, serialize fields. */ | |
1422 | if (nr_fields > 0) { | |
218deb69 | 1423 | ret = alloc_serialize_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1424 | nr_fields, lttng_fields); |
1425 | if (ret) | |
1426 | return ret; | |
1427 | } | |
1428 | ||
1429 | fields_len = sizeof(*fields) * nr_write_fields; | |
1430 | msg.m.fields_len = fields_len; | |
1431 | if (model_emf_uri) { | |
1432 | model_emf_uri_len = strlen(model_emf_uri) + 1; | |
1433 | } else { | |
1434 | model_emf_uri_len = 0; | |
1435 | } | |
1436 | msg.m.model_emf_uri_len = model_emf_uri_len; | |
c785c634 | 1437 | |
32ce8569 MD |
1438 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); |
1439 | if (len > 0 && len != sizeof(msg)) { | |
c785c634 MD |
1440 | ret = -EIO; |
1441 | goto error_fields; | |
32ce8569 MD |
1442 | } |
1443 | if (len < 0) { | |
c785c634 MD |
1444 | ret = len; |
1445 | goto error_fields; | |
32ce8569 MD |
1446 | } |
1447 | ||
1448 | /* send signature */ | |
1449 | len = ustcomm_send_unix_sock(sock, signature, signature_len); | |
1450 | if (len > 0 && len != signature_len) { | |
6b95617c MD |
1451 | ret = -EIO; |
1452 | goto error_fields; | |
32ce8569 MD |
1453 | } |
1454 | if (len < 0) { | |
6b95617c MD |
1455 | ret = len; |
1456 | goto error_fields; | |
32ce8569 MD |
1457 | } |
1458 | ||
1459 | /* send fields */ | |
1460 | if (fields_len > 0) { | |
1461 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
32ce8569 | 1462 | if (len > 0 && len != fields_len) { |
c785c634 MD |
1463 | ret = -EIO; |
1464 | goto error_fields; | |
32ce8569 MD |
1465 | } |
1466 | if (len < 0) { | |
c785c634 MD |
1467 | ret = len; |
1468 | goto error_fields; | |
32ce8569 MD |
1469 | } |
1470 | } | |
6b95617c | 1471 | free(fields); |
32ce8569 MD |
1472 | |
1473 | if (model_emf_uri_len) { | |
1474 | /* send model_emf_uri */ | |
1475 | len = ustcomm_send_unix_sock(sock, model_emf_uri, | |
1476 | model_emf_uri_len); | |
c785c634 | 1477 | if (len > 0 && len != model_emf_uri_len) { |
6b95617c | 1478 | return -EIO; |
c785c634 MD |
1479 | } |
1480 | if (len < 0) { | |
6b95617c | 1481 | return len; |
c785c634 | 1482 | } |
32ce8569 MD |
1483 | } |
1484 | ||
1485 | /* receive reply */ | |
1486 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1487 | switch (len) { | |
1488 | case 0: /* orderly shutdown */ | |
1489 | return -EPIPE; | |
1490 | case sizeof(reply): | |
1491 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1492 | ERR("Unexpected result message command " | |
1493 | "expected: %u vs received: %u\n", | |
1494 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1495 | return -EINVAL; | |
1496 | } | |
1497 | if (reply.r.ret_code > 0) | |
1498 | return -EINVAL; | |
1499 | if (reply.r.ret_code < 0) | |
1500 | return reply.r.ret_code; | |
1501 | *id = reply.r.event_id; | |
1502 | DBG("Sent register event notification for name \"%s\": ret_code %d, event_id %u\n", | |
1503 | event_name, reply.r.ret_code, reply.r.event_id); | |
1504 | return 0; | |
1505 | default: | |
1506 | if (len < 0) { | |
1507 | /* Transport level error */ | |
1508 | if (errno == EPIPE || errno == ECONNRESET) | |
1509 | len = -errno; | |
1510 | return len; | |
1511 | } else { | |
1512 | ERR("incorrect message size: %zd\n", len); | |
1513 | return len; | |
1514 | } | |
1515 | } | |
6b95617c | 1516 | /* Unreached. */ |
c785c634 | 1517 | |
6b95617c | 1518 | /* Error path only. */ |
c785c634 MD |
1519 | error_fields: |
1520 | free(fields); | |
1521 | return ret; | |
1522 | } | |
1523 | ||
1524 | /* | |
1525 | * Returns 0 on success, negative error value on error. | |
1526 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1527 | */ | |
1528 | int ustcomm_register_enum(int sock, | |
1529 | int session_objd, /* session descriptor */ | |
1530 | const char *enum_name, /* enum name (input) */ | |
1531 | size_t nr_entries, /* entries */ | |
a084756d | 1532 | struct lttng_ust_enum_entry **lttng_entries, |
c785c634 MD |
1533 | uint64_t *id) |
1534 | { | |
1535 | ssize_t len; | |
1536 | struct { | |
1537 | struct ustcomm_notify_hdr header; | |
1538 | struct ustcomm_notify_enum_msg m; | |
1539 | } msg; | |
1540 | struct { | |
1541 | struct ustcomm_notify_hdr header; | |
1542 | struct ustcomm_notify_enum_reply r; | |
1543 | } reply; | |
1544 | size_t entries_len; | |
1545 | struct ustctl_enum_entry *entries = NULL; | |
1546 | int ret; | |
1547 | ||
1548 | memset(&msg, 0, sizeof(msg)); | |
1549 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_ENUM; | |
1550 | msg.m.session_objd = session_objd; | |
fd17d7ce MD |
1551 | strncpy(msg.m.enum_name, enum_name, LTTNG_UST_ABI_SYM_NAME_LEN); |
1552 | msg.m.enum_name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
c785c634 MD |
1553 | |
1554 | /* Calculate entries len, serialize entries. */ | |
1555 | if (nr_entries > 0) { | |
1556 | ret = serialize_entries(&entries, | |
1557 | nr_entries, lttng_entries); | |
1558 | if (ret) | |
1559 | return ret; | |
1560 | } | |
1561 | ||
1562 | entries_len = sizeof(*entries) * nr_entries; | |
1563 | msg.m.entries_len = entries_len; | |
1564 | ||
1565 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1566 | if (len > 0 && len != sizeof(msg)) { | |
1567 | ret = -EIO; | |
1568 | goto error_entries; | |
1569 | } | |
1570 | if (len < 0) { | |
1571 | ret = len; | |
1572 | goto error_entries; | |
1573 | } | |
1574 | ||
1575 | /* send entries */ | |
1576 | if (entries_len > 0) { | |
1577 | len = ustcomm_send_unix_sock(sock, entries, entries_len); | |
1578 | if (len > 0 && len != entries_len) { | |
1579 | ret = -EIO; | |
1580 | goto error_entries; | |
1581 | } | |
1582 | if (len < 0) { | |
1583 | ret = len; | |
1584 | goto error_entries; | |
1585 | } | |
1586 | } | |
1587 | free(entries); | |
1588 | entries = NULL; | |
1589 | ||
1590 | /* receive reply */ | |
1591 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1592 | switch (len) { | |
1593 | case 0: /* orderly shutdown */ | |
1594 | return -EPIPE; | |
1595 | case sizeof(reply): | |
1596 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1597 | ERR("Unexpected result message command " | |
1598 | "expected: %u vs received: %u\n", | |
1599 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1600 | return -EINVAL; | |
1601 | } | |
1602 | if (reply.r.ret_code > 0) | |
1603 | return -EINVAL; | |
1604 | if (reply.r.ret_code < 0) | |
1605 | return reply.r.ret_code; | |
1606 | *id = reply.r.enum_id; | |
1607 | DBG("Sent register enum notification for name \"%s\": ret_code %d\n", | |
1608 | enum_name, reply.r.ret_code); | |
1609 | return 0; | |
1610 | default: | |
1611 | if (len < 0) { | |
1612 | /* Transport level error */ | |
1613 | if (errno == EPIPE || errno == ECONNRESET) | |
1614 | len = -errno; | |
1615 | return len; | |
1616 | } else { | |
1617 | ERR("incorrect message size: %zd\n", len); | |
1618 | return len; | |
1619 | } | |
1620 | } | |
1621 | return ret; | |
1622 | ||
1623 | error_entries: | |
1624 | free(entries); | |
1625 | return ret; | |
32ce8569 MD |
1626 | } |
1627 | ||
1628 | /* | |
1629 | * Returns 0 on success, negative error value on error. | |
1630 | * Returns -EPIPE or -ECONNRESET if other end has hung up. | |
1631 | */ | |
1632 | int ustcomm_register_channel(int sock, | |
f69fe5fb | 1633 | struct lttng_ust_session *session, |
32ce8569 MD |
1634 | int session_objd, /* session descriptor */ |
1635 | int channel_objd, /* channel descriptor */ | |
1636 | size_t nr_ctx_fields, | |
daacdbfc | 1637 | struct lttng_ust_ctx_field **ctx_fields, |
32ce8569 MD |
1638 | uint32_t *chan_id, /* channel id (output) */ |
1639 | int *header_type) /* header type (output) */ | |
1640 | { | |
1641 | ssize_t len; | |
1642 | struct { | |
1643 | struct ustcomm_notify_hdr header; | |
1644 | struct ustcomm_notify_channel_msg m; | |
1645 | } msg; | |
1646 | struct { | |
1647 | struct ustcomm_notify_hdr header; | |
1648 | struct ustcomm_notify_channel_reply r; | |
1649 | } reply; | |
1650 | size_t fields_len; | |
83e43212 | 1651 | struct ustctl_field *fields = NULL; |
32ce8569 MD |
1652 | int ret; |
1653 | size_t nr_write_fields = 0; | |
1654 | ||
1655 | memset(&msg, 0, sizeof(msg)); | |
1656 | msg.header.notify_cmd = USTCTL_NOTIFY_CMD_CHANNEL; | |
1657 | msg.m.session_objd = session_objd; | |
1658 | msg.m.channel_objd = channel_objd; | |
1659 | ||
1660 | /* Calculate fields len, serialize fields. */ | |
1661 | if (nr_ctx_fields > 0) { | |
53569322 | 1662 | ret = serialize_ctx_fields(session, &nr_write_fields, &fields, |
32ce8569 MD |
1663 | nr_ctx_fields, ctx_fields); |
1664 | if (ret) | |
1665 | return ret; | |
1666 | } | |
1667 | ||
1668 | fields_len = sizeof(*fields) * nr_write_fields; | |
1669 | msg.m.ctx_fields_len = fields_len; | |
1670 | len = ustcomm_send_unix_sock(sock, &msg, sizeof(msg)); | |
1671 | if (len > 0 && len != sizeof(msg)) { | |
1672 | free(fields); | |
1673 | return -EIO; | |
1674 | } | |
1675 | if (len < 0) { | |
1676 | free(fields); | |
1677 | return len; | |
1678 | } | |
1679 | ||
1680 | /* send fields */ | |
1681 | if (fields_len > 0) { | |
1682 | len = ustcomm_send_unix_sock(sock, fields, fields_len); | |
1683 | free(fields); | |
1684 | if (len > 0 && len != fields_len) { | |
1685 | return -EIO; | |
1686 | } | |
1687 | if (len < 0) { | |
1688 | return len; | |
1689 | } | |
17ea789c MD |
1690 | } else { |
1691 | free(fields); | |
32ce8569 MD |
1692 | } |
1693 | ||
1694 | len = ustcomm_recv_unix_sock(sock, &reply, sizeof(reply)); | |
1695 | switch (len) { | |
1696 | case 0: /* orderly shutdown */ | |
1697 | return -EPIPE; | |
1698 | case sizeof(reply): | |
1699 | if (reply.header.notify_cmd != msg.header.notify_cmd) { | |
1700 | ERR("Unexpected result message command " | |
1701 | "expected: %u vs received: %u\n", | |
1702 | msg.header.notify_cmd, reply.header.notify_cmd); | |
1703 | return -EINVAL; | |
1704 | } | |
1705 | if (reply.r.ret_code > 0) | |
1706 | return -EINVAL; | |
1707 | if (reply.r.ret_code < 0) | |
1708 | return reply.r.ret_code; | |
1709 | *chan_id = reply.r.chan_id; | |
1710 | switch (reply.r.header_type) { | |
1711 | case 1: | |
1712 | case 2: | |
1713 | *header_type = reply.r.header_type; | |
1714 | break; | |
1715 | default: | |
1716 | ERR("Unexpected channel header type %u\n", | |
1717 | reply.r.header_type); | |
1718 | return -EINVAL; | |
1719 | } | |
1720 | DBG("Sent register channel notification: chan_id %d, header_type %d\n", | |
1721 | reply.r.chan_id, reply.r.header_type); | |
1722 | return 0; | |
1723 | default: | |
1724 | if (len < 0) { | |
1725 | /* Transport level error */ | |
1726 | if (errno == EPIPE || errno == ECONNRESET) | |
1727 | len = -errno; | |
1728 | return len; | |
1729 | } else { | |
1730 | ERR("incorrect message size: %zd\n", len); | |
1731 | return len; | |
1732 | } | |
1733 | } | |
1734 | } | |
ff517991 MD |
1735 | |
1736 | /* | |
1737 | * Set socket reciving timeout. | |
1738 | */ | |
1739 | int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) | |
1740 | { | |
1741 | int ret; | |
1742 | struct timeval tv; | |
1743 | ||
1744 | tv.tv_sec = msec / 1000; | |
1745 | tv.tv_usec = (msec * 1000 % 1000000); | |
1746 | ||
1747 | ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); | |
1748 | if (ret < 0) { | |
1749 | PERROR("setsockopt SO_RCVTIMEO"); | |
1750 | ret = -errno; | |
1751 | } | |
1752 | ||
1753 | return ret; | |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * Set socket sending timeout. | |
1758 | */ | |
1759 | int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec) | |
1760 | { | |
1761 | int ret; | |
1762 | struct timeval tv; | |
1763 | ||
1764 | tv.tv_sec = msec / 1000; | |
1765 | tv.tv_usec = (msec * 1000) % 1000000; | |
1766 | ||
1767 | ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); | |
1768 | if (ret < 0) { | |
1769 | PERROR("setsockopt SO_SNDTIMEO"); | |
1770 | ret = -errno; | |
1771 | } | |
1772 | ||
1773 | return ret; | |
1774 | } |