Commit | Line | Data |
---|---|---|
2691221a MD |
1 | /* |
2 | * lttng-ust-comm.c | |
3 | * | |
4 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> | |
5 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | * | |
7 | * This library is free software; you can redistribute it and/or | |
8 | * modify it under the terms of the GNU Lesser General Public | |
9 | * License as published by the Free Software Foundation; only | |
10 | * version 2.1 of the License. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
15 | * Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public | |
18 | * License along with this library; if not, write to the Free Software | |
19 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
20 | */ | |
21 | ||
22 | #include <sys/types.h> | |
23 | #include <sys/socket.h> | |
2629549e | 24 | #include <sys/prctl.h> |
2691221a MD |
25 | #include <unistd.h> |
26 | #include <errno.h> | |
d9e99d10 | 27 | #include <pthread.h> |
11ff9c7d MD |
28 | #include <semaphore.h> |
29 | #include <time.h> | |
1ea11eab | 30 | #include <assert.h> |
95259bd0 | 31 | #include <urcu/uatomic.h> |
1ea11eab | 32 | |
edaa1431 MD |
33 | #include <lttng-ust-comm.h> |
34 | #include <ust/usterr-signal-safe.h> | |
35 | #include <ust/lttng-ust-abi.h> | |
36 | #include <ust/tracepoint.h> | |
d0a1ae63 | 37 | #include <ust/tracepoint-internal.h> |
edaa1431 MD |
38 | |
39 | /* | |
40 | * Has lttng ust comm constructor been called ? | |
41 | */ | |
42 | static int initialized; | |
43 | ||
1ea11eab MD |
44 | /* |
45 | * communication thread mutex. Held when handling a command, also held | |
46 | * by fork() to deal with removal of threads, and by exit path. | |
47 | */ | |
48 | static pthread_mutex_t lttng_ust_comm_mutex = PTHREAD_MUTEX_INITIALIZER; | |
49 | ||
50 | /* Should the ust comm thread quit ? */ | |
51 | static int lttng_ust_comm_should_quit; | |
52 | ||
11ff9c7d MD |
53 | /* |
54 | * Wait for either of these before continuing to the main | |
55 | * program: | |
56 | * - the register_done message from sessiond daemon | |
57 | * (will let the sessiond daemon enable sessions before main | |
58 | * starts.) | |
59 | * - sessiond daemon is not reachable. | |
60 | * - timeout (ensuring applications are resilient to session | |
61 | * daemon problems). | |
62 | */ | |
63 | static sem_t constructor_wait; | |
950aab0c MD |
64 | /* |
65 | * Doing this for both the global and local sessiond. | |
66 | */ | |
95259bd0 | 67 | static int sem_count = { 2 }; |
11ff9c7d | 68 | |
1ea11eab MD |
69 | /* |
70 | * Info about socket and associated listener thread. | |
71 | */ | |
72 | struct sock_info { | |
11ff9c7d | 73 | const char *name; |
1ea11eab MD |
74 | char sock_path[PATH_MAX]; |
75 | int socket; | |
76 | pthread_t ust_listener; /* listener thread */ | |
46050b1a | 77 | int root_handle; |
8d20bf54 MD |
78 | int constructor_sem_posted; |
79 | int allowed; | |
1ea11eab | 80 | }; |
2691221a MD |
81 | |
82 | /* Socket from app (connect) to session daemon (listen) for communication */ | |
1ea11eab | 83 | struct sock_info global_apps = { |
11ff9c7d | 84 | .name = "global", |
1ea11eab MD |
85 | .sock_path = DEFAULT_GLOBAL_APPS_UNIX_SOCK, |
86 | .socket = -1, | |
46050b1a | 87 | .root_handle = -1, |
8d20bf54 | 88 | .allowed = 1, |
1ea11eab | 89 | }; |
2691221a MD |
90 | |
91 | /* TODO: allow global_apps_sock_path override */ | |
92 | ||
1ea11eab | 93 | struct sock_info local_apps = { |
11ff9c7d | 94 | .name = "local", |
1ea11eab | 95 | .socket = -1, |
46050b1a | 96 | .root_handle = -1, |
8d20bf54 | 97 | .allowed = 0, /* Check setuid bit first */ |
1ea11eab | 98 | }; |
2691221a | 99 | |
edaa1431 MD |
100 | extern void ltt_ring_buffer_client_overwrite_init(void); |
101 | extern void ltt_ring_buffer_client_discard_init(void); | |
102 | extern void ltt_ring_buffer_metadata_client_init(void); | |
103 | extern void ltt_ring_buffer_client_overwrite_exit(void); | |
104 | extern void ltt_ring_buffer_client_discard_exit(void); | |
105 | extern void ltt_ring_buffer_metadata_client_exit(void); | |
106 | ||
2691221a | 107 | static |
8d20bf54 | 108 | int setup_local_apps(void) |
2691221a MD |
109 | { |
110 | const char *home_dir; | |
2691221a | 111 | |
8d20bf54 MD |
112 | /* |
113 | * Disallow per-user tracing for setuid binaries. | |
114 | */ | |
115 | if (getuid() != geteuid()) { | |
116 | local_apps.allowed = 0; | |
d0a1ae63 | 117 | return 0; |
8d20bf54 MD |
118 | } else { |
119 | local_apps.allowed = 1; | |
120 | } | |
2691221a MD |
121 | home_dir = (const char *) getenv("HOME"); |
122 | if (!home_dir) | |
123 | return -ENOENT; | |
1ea11eab | 124 | snprintf(local_apps.sock_path, PATH_MAX, |
2691221a | 125 | DEFAULT_HOME_APPS_UNIX_SOCK, home_dir); |
2691221a MD |
126 | return 0; |
127 | } | |
128 | ||
129 | static | |
130 | int register_app_to_sessiond(int socket) | |
131 | { | |
132 | ssize_t ret; | |
2629549e | 133 | int prctl_ret; |
2691221a | 134 | struct { |
e44418f3 MD |
135 | uint32_t major; |
136 | uint32_t minor; | |
2691221a | 137 | pid_t pid; |
5c33bde8 | 138 | pid_t ppid; |
2691221a | 139 | uid_t uid; |
83610856 | 140 | gid_t gid; |
2629549e | 141 | char name[16]; /* process name */ |
2691221a MD |
142 | } reg_msg; |
143 | ||
e44418f3 MD |
144 | reg_msg.major = LTTNG_UST_COMM_VERSION_MAJOR; |
145 | reg_msg.minor = LTTNG_UST_COMM_VERSION_MINOR; | |
2691221a | 146 | reg_msg.pid = getpid(); |
5c33bde8 | 147 | reg_msg.ppid = getppid(); |
2691221a | 148 | reg_msg.uid = getuid(); |
83610856 | 149 | reg_msg.gid = getgid(); |
2629549e MD |
150 | prctl_ret = prctl(PR_GET_NAME, (unsigned long) reg_msg.name, 0, 0, 0); |
151 | if (prctl_ret) { | |
152 | ERR("Error executing prctl"); | |
153 | return -errno; | |
154 | } | |
2691221a MD |
155 | |
156 | ret = lttcomm_send_unix_sock(socket, ®_msg, sizeof(reg_msg)); | |
157 | if (ret >= 0 && ret != sizeof(reg_msg)) | |
158 | return -EIO; | |
159 | return ret; | |
160 | } | |
161 | ||
d9e99d10 | 162 | static |
d3a492d1 | 163 | int send_reply(int sock, struct lttcomm_ust_reply *lur) |
d9e99d10 | 164 | { |
9eb62b9c | 165 | ssize_t len; |
d3a492d1 | 166 | |
a4be8962 | 167 | len = lttcomm_send_unix_sock(sock, lur, sizeof(*lur)); |
d3a492d1 | 168 | switch (len) { |
a4be8962 | 169 | case sizeof(*lur): |
d3a492d1 MD |
170 | DBG("message successfully sent"); |
171 | return 0; | |
172 | case -1: | |
173 | if (errno == ECONNRESET) { | |
174 | printf("remote end closed connection\n"); | |
175 | return 0; | |
176 | } | |
177 | return -1; | |
178 | default: | |
179 | printf("incorrect message size: %zd\n", len); | |
180 | return -1; | |
181 | } | |
182 | } | |
183 | ||
184 | static | |
edaa1431 | 185 | int handle_register_done(struct sock_info *sock_info) |
11ff9c7d MD |
186 | { |
187 | int ret; | |
188 | ||
edaa1431 MD |
189 | if (sock_info->constructor_sem_posted) |
190 | return 0; | |
191 | sock_info->constructor_sem_posted = 1; | |
95259bd0 MD |
192 | ret = uatomic_add_return(&sem_count, -1); |
193 | if (ret == 0) { | |
194 | ret = sem_post(&constructor_wait); | |
195 | assert(!ret); | |
196 | } | |
11ff9c7d MD |
197 | return 0; |
198 | } | |
199 | ||
200 | static | |
201 | int handle_message(struct sock_info *sock_info, | |
202 | int sock, struct lttcomm_ust_msg *lum) | |
d3a492d1 | 203 | { |
1ea11eab | 204 | int ret = 0; |
46050b1a MD |
205 | const struct objd_ops *ops; |
206 | struct lttcomm_ust_reply lur; | |
1ea11eab MD |
207 | |
208 | pthread_mutex_lock(<tng_ust_comm_mutex); | |
209 | ||
46050b1a MD |
210 | memset(&lur, 0, sizeof(lur)); |
211 | ||
1ea11eab | 212 | if (lttng_ust_comm_should_quit) { |
46050b1a | 213 | ret = -EPERM; |
1ea11eab MD |
214 | goto end; |
215 | } | |
9eb62b9c | 216 | |
46050b1a MD |
217 | ops = objd_ops(lum->handle); |
218 | if (!ops) { | |
219 | ret = -ENOENT; | |
220 | goto end; | |
1ea11eab | 221 | } |
46050b1a MD |
222 | |
223 | switch (lum->cmd) { | |
11ff9c7d MD |
224 | case LTTNG_UST_REGISTER_DONE: |
225 | if (lum->handle == LTTNG_UST_ROOT_HANDLE) | |
edaa1431 | 226 | ret = handle_register_done(sock_info); |
11ff9c7d MD |
227 | else |
228 | ret = -EINVAL; | |
229 | break; | |
46050b1a MD |
230 | case LTTNG_UST_RELEASE: |
231 | if (lum->handle == LTTNG_UST_ROOT_HANDLE) | |
232 | ret = -EPERM; | |
233 | else | |
234 | ret = objd_unref(lum->handle); | |
d9e99d10 MD |
235 | break; |
236 | default: | |
46050b1a MD |
237 | if (ops->cmd) |
238 | ret = ops->cmd(lum->handle, lum->cmd, | |
239 | (unsigned long) &lum->u); | |
240 | else | |
241 | ret = -ENOSYS; | |
242 | break; | |
d9e99d10 | 243 | } |
46050b1a | 244 | |
1ea11eab | 245 | end: |
46050b1a MD |
246 | lur.handle = lum->handle; |
247 | lur.cmd = lum->cmd; | |
248 | lur.ret_val = ret; | |
249 | if (ret >= 0) { | |
250 | lur.ret_code = LTTCOMM_OK; | |
251 | } else { | |
252 | lur.ret_code = LTTCOMM_SESSION_FAIL; | |
253 | } | |
254 | ret = send_reply(sock, &lur); | |
255 | ||
1ea11eab MD |
256 | pthread_mutex_unlock(<tng_ust_comm_mutex); |
257 | return ret; | |
d9e99d10 MD |
258 | } |
259 | ||
46050b1a MD |
260 | static |
261 | void cleanup_sock_info(struct sock_info *sock_info) | |
262 | { | |
263 | int ret; | |
264 | ||
265 | if (sock_info->socket != -1) { | |
266 | ret = close(sock_info->socket); | |
267 | if (ret) { | |
268 | ERR("Error closing local apps socket"); | |
269 | } | |
270 | sock_info->socket = -1; | |
271 | } | |
272 | if (sock_info->root_handle != -1) { | |
273 | ret = objd_unref(sock_info->root_handle); | |
274 | if (ret) { | |
275 | ERR("Error unref root handle"); | |
276 | } | |
277 | sock_info->root_handle = -1; | |
278 | } | |
279 | } | |
280 | ||
1ea11eab MD |
281 | /* |
282 | * This thread does not allocate any resource, except within | |
283 | * handle_message, within mutex protection. This mutex protects against | |
284 | * fork and exit. | |
285 | * The other moment it allocates resources is at socket connexion, which | |
286 | * is also protected by the mutex. | |
287 | */ | |
d9e99d10 MD |
288 | static |
289 | void *ust_listener_thread(void *arg) | |
290 | { | |
1ea11eab MD |
291 | struct sock_info *sock_info = arg; |
292 | int sock, ret; | |
d9e99d10 | 293 | |
9eb62b9c MD |
294 | /* Restart trying to connect to the session daemon */ |
295 | restart: | |
1ea11eab MD |
296 | pthread_mutex_lock(<tng_ust_comm_mutex); |
297 | ||
298 | if (lttng_ust_comm_should_quit) { | |
299 | pthread_mutex_unlock(<tng_ust_comm_mutex); | |
300 | goto quit; | |
301 | } | |
9eb62b9c | 302 | |
1ea11eab MD |
303 | if (sock_info->socket != -1) { |
304 | ret = close(sock_info->socket); | |
305 | if (ret) { | |
11ff9c7d | 306 | ERR("Error closing %s apps socket", sock_info->name); |
1ea11eab MD |
307 | } |
308 | sock_info->socket = -1; | |
309 | } | |
46050b1a | 310 | |
9eb62b9c MD |
311 | /* Check for sessiond availability with pipe TODO */ |
312 | ||
313 | /* Register */ | |
1ea11eab | 314 | ret = lttcomm_connect_unix_sock(sock_info->sock_path); |
9eb62b9c | 315 | if (ret < 0) { |
11ff9c7d MD |
316 | ERR("Error connecting to %s apps socket", sock_info->name); |
317 | /* | |
318 | * If we cannot find the sessiond daemon, don't delay | |
319 | * constructor execution. | |
320 | */ | |
edaa1431 | 321 | ret = handle_register_done(sock_info); |
11ff9c7d | 322 | assert(!ret); |
1ea11eab | 323 | pthread_mutex_unlock(<tng_ust_comm_mutex); |
4eef2998 | 324 | sleep(5); |
1ea11eab | 325 | goto restart; |
46050b1a MD |
326 | } |
327 | ||
328 | sock_info->socket = sock = ret; | |
329 | ||
330 | /* | |
331 | * Create only one root handle per listener thread for the whole | |
332 | * process lifetime. | |
333 | */ | |
334 | if (sock_info->root_handle == -1) { | |
335 | ret = lttng_abi_create_root_handle(); | |
336 | if (ret) { | |
337 | ERR("Error creating root handle"); | |
338 | pthread_mutex_unlock(<tng_ust_comm_mutex); | |
339 | goto quit; | |
340 | } | |
341 | sock_info->root_handle = ret; | |
9eb62b9c | 342 | } |
1ea11eab | 343 | |
9eb62b9c MD |
344 | ret = register_app_to_sessiond(sock); |
345 | if (ret < 0) { | |
11ff9c7d MD |
346 | ERR("Error registering to %s apps socket", sock_info->name); |
347 | /* | |
348 | * If we cannot register to the sessiond daemon, don't | |
349 | * delay constructor execution. | |
350 | */ | |
edaa1431 | 351 | ret = handle_register_done(sock_info); |
11ff9c7d | 352 | assert(!ret); |
46050b1a | 353 | pthread_mutex_unlock(<tng_ust_comm_mutex); |
9eb62b9c MD |
354 | sleep(5); |
355 | goto restart; | |
356 | } | |
46050b1a MD |
357 | pthread_mutex_unlock(<tng_ust_comm_mutex); |
358 | ||
d9e99d10 MD |
359 | for (;;) { |
360 | ssize_t len; | |
e7723462 | 361 | struct lttcomm_ust_msg lum; |
d9e99d10 | 362 | |
e7723462 | 363 | len = lttcomm_recv_unix_sock(sock, &lum, sizeof(lum)); |
d9e99d10 MD |
364 | switch (len) { |
365 | case 0: /* orderly shutdown */ | |
11ff9c7d | 366 | DBG("%s ltt-sessiond has performed an orderly shutdown\n", sock_info->name); |
d9e99d10 | 367 | goto end; |
e7723462 | 368 | case sizeof(lum): |
d9e99d10 | 369 | DBG("message received\n"); |
11ff9c7d | 370 | ret = handle_message(sock_info, sock, &lum); |
2a80c9d8 | 371 | if (ret < 0) { |
11ff9c7d | 372 | ERR("Error handling message for %s socket", sock_info->name); |
d9e99d10 MD |
373 | } |
374 | continue; | |
375 | case -1: | |
376 | if (errno == ECONNRESET) { | |
11ff9c7d | 377 | ERR("%s remote end closed connection\n", sock_info->name); |
d9e99d10 MD |
378 | goto end; |
379 | } | |
380 | goto end; | |
381 | default: | |
11ff9c7d | 382 | ERR("incorrect message size (%s socket): %zd\n", sock_info->name, len); |
d9e99d10 MD |
383 | continue; |
384 | } | |
385 | ||
386 | } | |
387 | end: | |
9eb62b9c | 388 | goto restart; /* try to reconnect */ |
1ea11eab | 389 | quit: |
d9e99d10 MD |
390 | return NULL; |
391 | } | |
392 | ||
cf12a773 MD |
393 | /* |
394 | * Return values: -1: don't wait. 0: wait forever. 1: timeout wait. | |
395 | */ | |
11ff9c7d MD |
396 | static |
397 | int get_timeout(struct timespec *constructor_timeout) | |
398 | { | |
cf12a773 MD |
399 | long constructor_delay_ms = LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS; |
400 | char *str_delay; | |
11ff9c7d MD |
401 | int ret; |
402 | ||
cf12a773 MD |
403 | str_delay = getenv("UST_REGISTER_TIMEOUT"); |
404 | if (str_delay) { | |
405 | constructor_delay_ms = strtol(str_delay, NULL, 10); | |
406 | } | |
407 | ||
408 | switch (constructor_delay_ms) { | |
409 | case -1:/* fall-through */ | |
410 | case 0: | |
411 | return constructor_delay_ms; | |
412 | default: | |
413 | break; | |
414 | } | |
415 | ||
416 | /* | |
417 | * If we are unable to find the current time, don't wait. | |
418 | */ | |
419 | ret = clock_gettime(CLOCK_REALTIME, constructor_timeout); | |
420 | if (ret) { | |
421 | return -1; | |
422 | } | |
95259bd0 MD |
423 | constructor_timeout->tv_sec += constructor_delay_ms / 1000UL; |
424 | constructor_timeout->tv_nsec += | |
425 | (constructor_delay_ms % 1000UL) * 1000000UL; | |
11ff9c7d MD |
426 | if (constructor_timeout->tv_nsec >= 1000000000UL) { |
427 | constructor_timeout->tv_sec++; | |
428 | constructor_timeout->tv_nsec -= 1000000000UL; | |
429 | } | |
cf12a773 | 430 | return 1; |
11ff9c7d | 431 | } |
d9e99d10 | 432 | |
2691221a MD |
433 | /* |
434 | * sessiond monitoring thread: monitor presence of global and per-user | |
435 | * sessiond by polling the application common named pipe. | |
436 | */ | |
437 | /* TODO */ | |
438 | ||
edaa1431 | 439 | void __attribute__((constructor)) lttng_ust_init(void) |
2691221a | 440 | { |
11ff9c7d | 441 | struct timespec constructor_timeout; |
cf12a773 | 442 | int timeout_mode; |
2691221a MD |
443 | int ret; |
444 | ||
edaa1431 MD |
445 | if (uatomic_xchg(&initialized, 1) == 1) |
446 | return; | |
447 | ||
448 | /* | |
449 | * We want precise control over the order in which we construct | |
450 | * our sub-libraries vs starting to receive commands from | |
451 | * sessiond (otherwise leading to errors when trying to create | |
452 | * sessiond before the init functions are completed). | |
453 | */ | |
2691221a | 454 | init_usterr(); |
edaa1431 MD |
455 | init_tracepoint(); |
456 | ltt_ring_buffer_metadata_client_init(); | |
457 | ltt_ring_buffer_client_overwrite_init(); | |
458 | ltt_ring_buffer_client_discard_init(); | |
2691221a | 459 | |
cf12a773 | 460 | timeout_mode = get_timeout(&constructor_timeout); |
11ff9c7d | 461 | |
95259bd0 | 462 | ret = sem_init(&constructor_wait, 0, 0); |
11ff9c7d MD |
463 | assert(!ret); |
464 | ||
8d20bf54 | 465 | ret = setup_local_apps(); |
2691221a | 466 | if (ret) { |
8d20bf54 | 467 | ERR("Error setting up to local apps"); |
2691221a | 468 | } |
1ea11eab MD |
469 | ret = pthread_create(&local_apps.ust_listener, NULL, |
470 | ust_listener_thread, &local_apps); | |
11ff9c7d | 471 | |
8d20bf54 MD |
472 | if (local_apps.allowed) { |
473 | ret = pthread_create(&global_apps.ust_listener, NULL, | |
474 | ust_listener_thread, &global_apps); | |
475 | } else { | |
476 | handle_register_done(&local_apps); | |
477 | } | |
478 | ||
cf12a773 MD |
479 | switch (timeout_mode) { |
480 | case 1: /* timeout wait */ | |
95259bd0 MD |
481 | do { |
482 | ret = sem_timedwait(&constructor_wait, | |
483 | &constructor_timeout); | |
484 | } while (ret < 0 && errno == EINTR); | |
cf12a773 MD |
485 | if (ret < 0 && errno == ETIMEDOUT) { |
486 | ERR("Timed out waiting for ltt-sessiond"); | |
487 | } else { | |
488 | assert(!ret); | |
489 | } | |
490 | break; | |
7b766b16 | 491 | case -1:/* wait forever */ |
95259bd0 MD |
492 | do { |
493 | ret = sem_wait(&constructor_wait); | |
494 | } while (ret < 0 && errno == EINTR); | |
11ff9c7d | 495 | assert(!ret); |
cf12a773 | 496 | break; |
7b766b16 | 497 | case 0: /* no timeout */ |
cf12a773 | 498 | break; |
11ff9c7d | 499 | } |
2691221a MD |
500 | } |
501 | ||
edaa1431 | 502 | void __attribute__((destructor)) lttng_ust_exit(void) |
2691221a MD |
503 | { |
504 | int ret; | |
505 | ||
9eb62b9c MD |
506 | /* |
507 | * Using pthread_cancel here because: | |
508 | * A) we don't want to hang application teardown. | |
509 | * B) the thread is not allocating any resource. | |
510 | */ | |
1ea11eab MD |
511 | |
512 | /* | |
513 | * Require the communication thread to quit. Synchronize with | |
514 | * mutexes to ensure it is not in a mutex critical section when | |
515 | * pthread_cancel is later called. | |
516 | */ | |
517 | pthread_mutex_lock(<tng_ust_comm_mutex); | |
518 | lttng_ust_comm_should_quit = 1; | |
519 | pthread_mutex_unlock(<tng_ust_comm_mutex); | |
520 | ||
1ea11eab | 521 | ret = pthread_cancel(global_apps.ust_listener); |
9eb62b9c MD |
522 | if (ret) { |
523 | ERR("Error cancelling global ust listener thread"); | |
2691221a | 524 | } |
46050b1a MD |
525 | |
526 | cleanup_sock_info(&global_apps); | |
1ea11eab | 527 | |
8d20bf54 MD |
528 | if (local_apps.allowed) { |
529 | ret = pthread_cancel(local_apps.ust_listener); | |
530 | if (ret) { | |
531 | ERR("Error cancelling local ust listener thread"); | |
532 | } | |
1ea11eab | 533 | |
8d20bf54 MD |
534 | cleanup_sock_info(&local_apps); |
535 | } | |
1ea11eab | 536 | |
b35d179d | 537 | lttng_ust_abi_exit(); |
1ea11eab | 538 | ltt_events_exit(); |
edaa1431 MD |
539 | ltt_ring_buffer_client_discard_exit(); |
540 | ltt_ring_buffer_client_overwrite_exit(); | |
541 | ltt_ring_buffer_metadata_client_exit(); | |
542 | exit_tracepoint(); | |
2691221a | 543 | } |