trackers: add sessiond tracker list implementation
[lttng-tools.git] / src / bin / lttng-sessiond / main.c
CommitLineData
826d496d
MD
1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
0fdd1e2c 3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
26296c48 4 * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
fac6795d 5 *
d14d33bf
AM
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
91d76f53 9 *
d14d33bf
AM
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
91d76f53 14 *
d14d33bf
AM
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
fac6795d
DG
18 */
19
6c1c0768 20#define _LGPL_SOURCE
fac6795d
DG
21#include <getopt.h>
22#include <grp.h>
23#include <limits.h>
0bb7724a 24#include <paths.h>
fac6795d
DG
25#include <pthread.h>
26#include <signal.h>
27#include <stdio.h>
28#include <stdlib.h>
29#include <string.h>
331744e3 30#include <inttypes.h>
0fdd1e2c 31#include <sys/mman.h>
b73401da 32#include <sys/mount.h>
1e307fab 33#include <sys/resource.h>
fac6795d
DG
34#include <sys/socket.h>
35#include <sys/stat.h>
36#include <sys/types.h>
0fdd1e2c 37#include <sys/wait.h>
5c827ce0 38#include <urcu/uatomic.h>
fac6795d 39#include <unistd.h>
4f0b90ee 40#include <ctype.h>
fac6795d 41
990570ed 42#include <common/common.h>
d27c42b8 43#include <common/compat/socket.h>
e8fa9fb0 44#include <common/compat/getenv.h>
db758600
DG
45#include <common/defaults.h>
46#include <common/kernel-consumer/kernel-consumer.h>
50c8f484 47#include <common/futex.h>
00e2e675 48#include <common/relayd/relayd.h>
81b86775 49#include <common/utils.h>
3ccdf997 50#include <common/daemonize.h>
f40ef1d5 51#include <common/config/session-config.h>
dcabc190 52#include <common/dynamic-buffer.h>
76fcf151 53#include <lttng/event-internal.h>
fac6795d 54
10a8a223 55#include "lttng-sessiond.h"
7972aab2 56#include "buffer-registry.h"
54d01ffb 57#include "channel.h"
2f77fc4b 58#include "cmd.h"
00e2e675 59#include "consumer.h"
099e26bd 60#include "context.h"
54d01ffb 61#include "event.h"
4771f025 62#include "kernel.h"
f1e16794 63#include "kernel-consumer.h"
0fdd1e2c 64#include "shm.h"
75018ab6 65#include "lttng-ust-ctl.h"
00e2e675 66#include "ust-consumer.h"
8e68d1c8 67#include "utils.h"
4063050c 68#include "fd-limit.h"
8782cc74 69#include "health-sessiond.h"
8ac94142 70#include "testpoint.h"
f9d2ba6a 71#include "notify-apps.h"
022d91ba 72#include "agent-thread.h"
fb198a11 73#include "save.h"
b3530820
JG
74#include "notification-thread.h"
75#include "notification-thread-commands.h"
db66e574 76#include "rotation-thread.h"
7c1d2758 77#include "agent.h"
5e97de00 78#include "ht-cleanup.h"
e6142f2e 79#include "sessiond-config.h"
8e319828 80#include "timer.h"
a3707772 81#include "thread.h"
917a718d 82#include "client.h"
5d1b0219 83#include "dispatch.h"
1785d7f2 84#include "register.h"
7649924e 85#include "manage-apps.h"
5b093681 86#include "manage-kernel.h"
ebaeda94 87
4fc83d94
PP
88static const char *help_msg =
89#ifdef LTTNG_EMBED_HELP
90#include <lttng-sessiond.8.h>
91#else
92NULL
93#endif
94;
95
fac6795d 96const char *progname;
c9cb3e7d 97static int lockfile_fd = -1;
a3bc3918 98static int opt_print_version;
3bd1e081 99
0bb7724a
DG
100/* Set to 1 when a SIGUSR1 signal is received. */
101static int recv_child_signal;
102
26296c48
JG
103/* Command line options */
104static const struct option long_options[] = {
0f5ea17c
JG
105 { "client-sock", required_argument, 0, 'c' },
106 { "apps-sock", required_argument, 0, 'a' },
107 { "kconsumerd-cmd-sock", required_argument, 0, '\0' },
108 { "kconsumerd-err-sock", required_argument, 0, '\0' },
109 { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' },
110 { "ustconsumerd32-err-sock", required_argument, 0, '\0' },
111 { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' },
112 { "ustconsumerd64-err-sock", required_argument, 0, '\0' },
113 { "consumerd32-path", required_argument, 0, '\0' },
114 { "consumerd32-libdir", required_argument, 0, '\0' },
115 { "consumerd64-path", required_argument, 0, '\0' },
116 { "consumerd64-libdir", required_argument, 0, '\0' },
117 { "daemonize", no_argument, 0, 'd' },
118 { "background", no_argument, 0, 'b' },
119 { "sig-parent", no_argument, 0, 'S' },
120 { "help", no_argument, 0, 'h' },
121 { "group", required_argument, 0, 'g' },
122 { "version", no_argument, 0, 'V' },
123 { "quiet", no_argument, 0, 'q' },
124 { "verbose", no_argument, 0, 'v' },
125 { "verbose-consumer", no_argument, 0, '\0' },
126 { "no-kernel", no_argument, 0, '\0' },
127 { "pidfile", required_argument, 0, 'p' },
128 { "agent-tcp-port", required_argument, 0, '\0' },
129 { "config", required_argument, 0, 'f' },
130 { "load", required_argument, 0, 'l' },
131 { "kmod-probes", required_argument, 0, '\0' },
132 { "extra-kmod-probes", required_argument, 0, '\0' },
26296c48
JG
133 { NULL, 0, 0, 0 }
134};
135
136/* Command line options to ignore from configuration file */
137static const char *config_ignore_options[] = { "help", "version", "config" };
1d4b027a 138
099e26bd
DG
139/*
140 * This pipe is used to inform the thread managing application communication
141 * that a command is queued and ready to be processed.
142 */
76d7553f 143static int apps_cmd_pipe[2] = { -1, -1 };
971a61c6 144static int apps_cmd_notify_pipe[2] = { -1, -1 };
099e26bd 145
099e26bd
DG
146/*
147 * UST registration command queue. This queue is tied with a futex and uses a N
148 * wakers / 1 waiter implemented and detailed in futex.c/.h
149 *
b22c5da8
DG
150 * The thread_registration_apps and thread_dispatch_ust_registration uses this
151 * queue along with the wait/wake scheme. The thread_manage_apps receives down
152 * the line new application socket and monitors it for any I/O error or clean
153 * close that triggers an unregistration of the application.
099e26bd
DG
154 */
155static struct ust_cmd_queue ust_cmd_queue;
156
97bc1426 157/*
a7333da7 158 * Section name to look for in the daemon configuration file.
97bc1426 159 */
a7333da7 160static const char * const config_section_name = "sessiond";
5e97de00 161
a7333da7
JG
162/* Am I root or not. Set to 1 if the daemon is running as root */
163static int is_root;
5eb91c98 164
099e26bd
DG
165/*
166 * Stop all threads by closing the thread quit pipe.
167 */
cf3af59e
MD
168static void stop_threads(void)
169{
5eb91c98
DG
170 int ret;
171
cf3af59e
MD
172 /* Stopping all threads */
173 DBG("Terminating all threads");
a7333da7 174 ret = sessiond_notify_quit_pipe();
5eb91c98
DG
175 if (ret < 0) {
176 ERR("write error on thread quit pipe");
177 }
cf3af59e
MD
178}
179
e975f9f8
DG
180/*
181 * Close every consumer sockets.
182 */
183static void close_consumer_sockets(void)
184{
185 int ret;
186
187 if (kconsumer_data.err_sock >= 0) {
188 ret = close(kconsumer_data.err_sock);
189 if (ret < 0) {
190 PERROR("kernel consumer err_sock close");
191 }
192 }
193 if (ustconsumer32_data.err_sock >= 0) {
194 ret = close(ustconsumer32_data.err_sock);
195 if (ret < 0) {
a76cbd9f 196 PERROR("UST consumerd32 err_sock close");
e975f9f8
DG
197 }
198 }
199 if (ustconsumer64_data.err_sock >= 0) {
200 ret = close(ustconsumer64_data.err_sock);
201 if (ret < 0) {
a76cbd9f 202 PERROR("UST consumerd64 err_sock close");
e975f9f8
DG
203 }
204 }
205 if (kconsumer_data.cmd_sock >= 0) {
206 ret = close(kconsumer_data.cmd_sock);
207 if (ret < 0) {
208 PERROR("kernel consumer cmd_sock close");
209 }
210 }
211 if (ustconsumer32_data.cmd_sock >= 0) {
212 ret = close(ustconsumer32_data.cmd_sock);
213 if (ret < 0) {
a76cbd9f 214 PERROR("UST consumerd32 cmd_sock close");
e975f9f8
DG
215 }
216 }
217 if (ustconsumer64_data.cmd_sock >= 0) {
218 ret = close(ustconsumer64_data.cmd_sock);
219 if (ret < 0) {
a76cbd9f 220 PERROR("UST consumerd64 cmd_sock close");
e975f9f8
DG
221 }
222 }
b3530820
JG
223 if (kconsumer_data.channel_monitor_pipe >= 0) {
224 ret = close(kconsumer_data.channel_monitor_pipe);
225 if (ret < 0) {
226 PERROR("kernel consumer channel monitor pipe close");
227 }
228 }
229 if (ustconsumer32_data.channel_monitor_pipe >= 0) {
230 ret = close(ustconsumer32_data.channel_monitor_pipe);
231 if (ret < 0) {
232 PERROR("UST consumerd32 channel monitor pipe close");
233 }
234 }
235 if (ustconsumer64_data.channel_monitor_pipe >= 0) {
236 ret = close(ustconsumer64_data.channel_monitor_pipe);
237 if (ret < 0) {
238 PERROR("UST consumerd64 channel monitor pipe close");
239 }
240 }
e975f9f8
DG
241}
242
4e4714cb
JR
243/*
244 * Wait on consumer process termination.
245 *
246 * Need to be called with the consumer data lock held or from a context
247 * ensuring no concurrent access to data (e.g: cleanup).
248 */
249static void wait_consumer(struct consumer_data *consumer_data)
250{
251 pid_t ret;
252 int status;
253
254 if (consumer_data->pid <= 0) {
255 return;
256 }
257
258 DBG("Waiting for complete teardown of consumerd (PID: %d)",
259 consumer_data->pid);
260 ret = waitpid(consumer_data->pid, &status, 0);
261 if (ret == -1) {
262 PERROR("consumerd waitpid pid: %d", consumer_data->pid)
1640c24c 263 } else if (!WIFEXITED(status)) {
4e4714cb
JR
264 ERR("consumerd termination with error: %d",
265 WEXITSTATUS(ret));
266 }
267 consumer_data->pid = 0;
268}
269
fac6795d 270/*
4a15001e 271 * Cleanup the session daemon's data structures.
fac6795d 272 */
4a15001e 273static void sessiond_cleanup(void)
fac6795d 274{
ef599319 275 int ret;
e32d7f27 276 struct ltt_session_list *session_list = session_get_list();
fac6795d 277
4a15001e 278 DBG("Cleanup sessiond");
e07ae692 279
4e449f3f
MD
280 /*
281 * Close the thread quit pipe. It has already done its job,
282 * since we are now called.
283 */
a7333da7 284 sessiond_close_quit_pipe();
971a61c6
JG
285 utils_close_pipe(apps_cmd_pipe);
286 utils_close_pipe(apps_cmd_notify_pipe);
5b093681 287 utils_close_pipe(kernel_poll_pipe);
2f77fc4b 288
c9a2957d
JG
289 ret = remove(config.pid_file_path.value);
290 if (ret < 0) {
291 PERROR("remove pidfile %s", config.pid_file_path.value);
35f90c40
DG
292 }
293
e6142f2e
JG
294 DBG("Removing sessiond and consumerd content of directory %s",
295 config.rundir.value);
8c6c56c2
MD
296
297 /* sessiond */
e6142f2e
JG
298 DBG("Removing %s", config.pid_file_path.value);
299 (void) unlink(config.pid_file_path.value);
8c6c56c2 300
e6142f2e
JG
301 DBG("Removing %s", config.agent_port_file_path.value);
302 (void) unlink(config.agent_port_file_path.value);
cd9290dd 303
8c6c56c2 304 /* kconsumerd */
e6142f2e
JG
305 DBG("Removing %s", kconsumer_data.err_unix_sock_path);
306 (void) unlink(kconsumer_data.err_unix_sock_path);
307
308 DBG("Removing directory %s", config.kconsumerd_path.value);
309 (void) rmdir(config.kconsumerd_path.value);
8c6c56c2
MD
310
311 /* ust consumerd 32 */
e6142f2e
JG
312 DBG("Removing %s", config.consumerd32_err_unix_sock_path.value);
313 (void) unlink(config.consumerd32_err_unix_sock_path.value);
314
315 DBG("Removing directory %s", config.consumerd32_path.value);
316 (void) rmdir(config.consumerd32_path.value);
8c6c56c2
MD
317
318 /* ust consumerd 64 */
e6142f2e
JG
319 DBG("Removing %s", config.consumerd64_err_unix_sock_path.value);
320 (void) unlink(config.consumerd64_err_unix_sock_path.value);
321
322 DBG("Removing directory %s", config.consumerd64_path.value);
323 (void) rmdir(config.consumerd64_path.value);
5461b305 324
99d688f2 325 pthread_mutex_destroy(&session_list->lock);
273ea72c 326
6a4e4039
JG
327 DBG("Cleaning up all agent apps");
328 agent_app_ht_clean();
099e26bd 329 DBG("Closing all UST sockets");
56fff090 330 ust_app_clean_list();
7972aab2 331 buffer_reg_destroy_registries();
099e26bd 332
0787fc4b
MD
333 close_consumer_sockets();
334
335 wait_consumer(&kconsumer_data);
336 wait_consumer(&ustconsumer64_data);
337 wait_consumer(&ustconsumer32_data);
338
e6142f2e 339 if (is_root && !config.no_kernel) {
7d268848 340 cleanup_kernel_tracer();
2f50c8a3 341 }
2f77fc4b 342
c9cb3e7d
JG
343 /*
344 * We do NOT rmdir rundir because there are other processes
345 * using it, for instance lttng-relayd, which can start in
346 * parallel with this teardown.
347 */
4a15001e
MD
348}
349
350/*
351 * Cleanup the daemon's option data structures.
352 */
353static void sessiond_cleanup_options(void)
354{
355 DBG("Cleaning up options");
356
e6142f2e 357 sessiond_config_fini(&config);
c9cb3e7d 358
7567352f 359 run_as_destroy_worker();
fac6795d
DG
360}
361
917a718d 362static int string_match(const char *str1, const char *str2)
54d01ffb 363{
917a718d 364 return (str1 && str2) && !strcmp(str1, str2);
54d01ffb
DG
365}
366
00e2e675 367/*
917a718d
JG
368 * Take an option from the getopt output and set it in the right variable to be
369 * used later.
36b588ed 370 *
917a718d 371 * Return 0 on success else a negative value.
00e2e675 372 */
917a718d 373static int set_option(int opt, const char *arg, const char *optname)
00e2e675 374{
917a718d 375 int ret = 0;
fac6795d 376
c0232ea5 377 if (string_match(optname, "client-sock") || opt == 'c') {
66b2ce8e
JG
378 if (!arg || *arg == '\0') {
379 ret = -EINVAL;
380 goto end;
381 }
e8fa9fb0
MD
382 if (lttng_is_setuid_setgid()) {
383 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
384 "-c, --client-sock");
385 } else {
e6142f2e
JG
386 config_string_set(&config.client_unix_sock_path,
387 strdup(arg));
388 if (!config.client_unix_sock_path.value) {
389 ret = -ENOMEM;
390 PERROR("strdup");
391 }
e8fa9fb0 392 }
c0232ea5 393 } else if (string_match(optname, "apps-sock") || opt == 'a') {
66b2ce8e
JG
394 if (!arg || *arg == '\0') {
395 ret = -EINVAL;
396 goto end;
397 }
e8fa9fb0
MD
398 if (lttng_is_setuid_setgid()) {
399 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
400 "-a, --apps-sock");
401 } else {
e6142f2e
JG
402 config_string_set(&config.apps_unix_sock_path,
403 strdup(arg));
404 if (!config.apps_unix_sock_path.value) {
405 ret = -ENOMEM;
406 PERROR("strdup");
407 }
e8fa9fb0 408 }
c0232ea5 409 } else if (string_match(optname, "daemonize") || opt == 'd') {
e6142f2e 410 config.daemonize = true;
c0232ea5 411 } else if (string_match(optname, "background") || opt == 'b') {
e6142f2e 412 config.background = true;
c0232ea5 413 } else if (string_match(optname, "group") || opt == 'g') {
66b2ce8e
JG
414 if (!arg || *arg == '\0') {
415 ret = -EINVAL;
416 goto end;
417 }
e8fa9fb0
MD
418 if (lttng_is_setuid_setgid()) {
419 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
420 "-g, --group");
421 } else {
e6142f2e
JG
422 config_string_set(&config.tracing_group_name,
423 strdup(arg));
424 if (!config.tracing_group_name.value) {
e8fa9fb0 425 ret = -ENOMEM;
e6142f2e 426 PERROR("strdup");
e8fa9fb0 427 }
db322c4d 428 }
c0232ea5 429 } else if (string_match(optname, "help") || opt == 'h') {
4fc83d94 430 ret = utils_show_help(8, "lttng-sessiond", help_msg);
8190767e 431 if (ret) {
4fc83d94 432 ERR("Cannot show --help for `lttng-sessiond`");
8190767e
PP
433 perror("exec");
434 }
435 exit(ret ? EXIT_FAILURE : EXIT_SUCCESS);
c0232ea5 436 } else if (string_match(optname, "version") || opt == 'V') {
a3bc3918 437 opt_print_version = 1;
c0232ea5 438 } else if (string_match(optname, "sig-parent") || opt == 'S') {
e6142f2e 439 config.sig_parent = true;
c0232ea5 440 } else if (string_match(optname, "kconsumerd-err-sock")) {
66b2ce8e
JG
441 if (!arg || *arg == '\0') {
442 ret = -EINVAL;
443 goto end;
444 }
e8fa9fb0
MD
445 if (lttng_is_setuid_setgid()) {
446 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
447 "--kconsumerd-err-sock");
448 } else {
e6142f2e
JG
449 config_string_set(&config.kconsumerd_err_unix_sock_path,
450 strdup(arg));
451 if (!config.kconsumerd_err_unix_sock_path.value) {
452 ret = -ENOMEM;
453 PERROR("strdup");
454 }
e8fa9fb0 455 }
c0232ea5 456 } else if (string_match(optname, "kconsumerd-cmd-sock")) {
66b2ce8e
JG
457 if (!arg || *arg == '\0') {
458 ret = -EINVAL;
459 goto end;
460 }
e8fa9fb0
MD
461 if (lttng_is_setuid_setgid()) {
462 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
463 "--kconsumerd-cmd-sock");
464 } else {
e6142f2e
JG
465 config_string_set(&config.kconsumerd_cmd_unix_sock_path,
466 strdup(arg));
467 if (!config.kconsumerd_cmd_unix_sock_path.value) {
468 ret = -ENOMEM;
469 PERROR("strdup");
470 }
e8fa9fb0 471 }
c0232ea5 472 } else if (string_match(optname, "ustconsumerd64-err-sock")) {
66b2ce8e
JG
473 if (!arg || *arg == '\0') {
474 ret = -EINVAL;
475 goto end;
476 }
e8fa9fb0
MD
477 if (lttng_is_setuid_setgid()) {
478 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
479 "--ustconsumerd64-err-sock");
480 } else {
e6142f2e
JG
481 config_string_set(&config.consumerd64_err_unix_sock_path,
482 strdup(arg));
483 if (!config.consumerd64_err_unix_sock_path.value) {
484 ret = -ENOMEM;
485 PERROR("strdup");
486 }
e8fa9fb0 487 }
c0232ea5 488 } else if (string_match(optname, "ustconsumerd64-cmd-sock")) {
66b2ce8e
JG
489 if (!arg || *arg == '\0') {
490 ret = -EINVAL;
491 goto end;
492 }
e8fa9fb0
MD
493 if (lttng_is_setuid_setgid()) {
494 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
495 "--ustconsumerd64-cmd-sock");
496 } else {
e6142f2e
JG
497 config_string_set(&config.consumerd64_cmd_unix_sock_path,
498 strdup(arg));
499 if (!config.consumerd64_cmd_unix_sock_path.value) {
500 ret = -ENOMEM;
501 PERROR("strdup");
502 }
e8fa9fb0 503 }
c0232ea5 504 } else if (string_match(optname, "ustconsumerd32-err-sock")) {
66b2ce8e
JG
505 if (!arg || *arg == '\0') {
506 ret = -EINVAL;
507 goto end;
508 }
e8fa9fb0
MD
509 if (lttng_is_setuid_setgid()) {
510 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
511 "--ustconsumerd32-err-sock");
512 } else {
e6142f2e
JG
513 config_string_set(&config.consumerd32_err_unix_sock_path,
514 strdup(arg));
515 if (!config.consumerd32_err_unix_sock_path.value) {
516 ret = -ENOMEM;
517 PERROR("strdup");
518 }
e8fa9fb0 519 }
c0232ea5 520 } else if (string_match(optname, "ustconsumerd32-cmd-sock")) {
66b2ce8e
JG
521 if (!arg || *arg == '\0') {
522 ret = -EINVAL;
523 goto end;
524 }
e8fa9fb0
MD
525 if (lttng_is_setuid_setgid()) {
526 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
527 "--ustconsumerd32-cmd-sock");
528 } else {
e6142f2e
JG
529 config_string_set(&config.consumerd32_cmd_unix_sock_path,
530 strdup(arg));
531 if (!config.consumerd32_cmd_unix_sock_path.value) {
532 ret = -ENOMEM;
533 PERROR("strdup");
534 }
e8fa9fb0 535 }
c0232ea5 536 } else if (string_match(optname, "no-kernel")) {
e6142f2e 537 config.no_kernel = true;
c0232ea5 538 } else if (string_match(optname, "quiet") || opt == 'q') {
6d9a9c65 539 config.quiet = true;
c0232ea5 540 } else if (string_match(optname, "verbose") || opt == 'v') {
26296c48
JG
541 /* Verbose level can increase using multiple -v */
542 if (arg) {
13755a18 543 /* Value obtained from config file */
e6142f2e 544 config.verbose = config_parse_value(arg);
26296c48 545 } else {
13755a18 546 /* -v used on command line */
e6142f2e 547 config.verbose++;
26296c48 548 }
13755a18 549 /* Clamp value to [0, 3] */
e6142f2e
JG
550 config.verbose = config.verbose < 0 ? 0 :
551 (config.verbose <= 3 ? config.verbose : 3);
c0232ea5 552 } else if (string_match(optname, "verbose-consumer")) {
26296c48 553 if (arg) {
e6142f2e 554 config.verbose_consumer = config_parse_value(arg);
26296c48 555 } else {
e6142f2e 556 config.verbose_consumer++;
26296c48 557 }
c0232ea5 558 } else if (string_match(optname, "consumerd32-path")) {
66b2ce8e
JG
559 if (!arg || *arg == '\0') {
560 ret = -EINVAL;
561 goto end;
562 }
e8fa9fb0
MD
563 if (lttng_is_setuid_setgid()) {
564 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
565 "--consumerd32-path");
566 } else {
e6142f2e
JG
567 config_string_set(&config.consumerd32_bin_path,
568 strdup(arg));
569 if (!config.consumerd32_bin_path.value) {
e8fa9fb0
MD
570 PERROR("strdup");
571 ret = -ENOMEM;
572 }
db322c4d 573 }
c0232ea5 574 } else if (string_match(optname, "consumerd32-libdir")) {
66b2ce8e
JG
575 if (!arg || *arg == '\0') {
576 ret = -EINVAL;
577 goto end;
578 }
e8fa9fb0
MD
579 if (lttng_is_setuid_setgid()) {
580 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
581 "--consumerd32-libdir");
582 } else {
e6142f2e
JG
583 config_string_set(&config.consumerd32_lib_dir,
584 strdup(arg));
585 if (!config.consumerd32_lib_dir.value) {
e8fa9fb0
MD
586 PERROR("strdup");
587 ret = -ENOMEM;
588 }
db322c4d 589 }
c0232ea5 590 } else if (string_match(optname, "consumerd64-path")) {
66b2ce8e
JG
591 if (!arg || *arg == '\0') {
592 ret = -EINVAL;
593 goto end;
594 }
e8fa9fb0
MD
595 if (lttng_is_setuid_setgid()) {
596 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
597 "--consumerd64-path");
598 } else {
e6142f2e
JG
599 config_string_set(&config.consumerd64_bin_path,
600 strdup(arg));
601 if (!config.consumerd64_bin_path.value) {
e8fa9fb0
MD
602 PERROR("strdup");
603 ret = -ENOMEM;
604 }
db322c4d 605 }
c0232ea5 606 } else if (string_match(optname, "consumerd64-libdir")) {
66b2ce8e
JG
607 if (!arg || *arg == '\0') {
608 ret = -EINVAL;
609 goto end;
610 }
e8fa9fb0
MD
611 if (lttng_is_setuid_setgid()) {
612 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
613 "--consumerd64-libdir");
614 } else {
e6142f2e
JG
615 config_string_set(&config.consumerd64_lib_dir,
616 strdup(arg));
617 if (!config.consumerd64_lib_dir.value) {
e8fa9fb0
MD
618 PERROR("strdup");
619 ret = -ENOMEM;
620 }
db322c4d 621 }
c0232ea5 622 } else if (string_match(optname, "pidfile") || opt == 'p') {
66b2ce8e
JG
623 if (!arg || *arg == '\0') {
624 ret = -EINVAL;
625 goto end;
626 }
e8fa9fb0
MD
627 if (lttng_is_setuid_setgid()) {
628 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
629 "-p, --pidfile");
630 } else {
e6142f2e
JG
631 config_string_set(&config.pid_file_path, strdup(arg));
632 if (!config.pid_file_path.value) {
e8fa9fb0
MD
633 PERROR("strdup");
634 ret = -ENOMEM;
635 }
db322c4d 636 }
c0232ea5 637 } else if (string_match(optname, "agent-tcp-port")) {
66b2ce8e
JG
638 if (!arg || *arg == '\0') {
639 ret = -EINVAL;
640 goto end;
641 }
e8fa9fb0
MD
642 if (lttng_is_setuid_setgid()) {
643 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
644 "--agent-tcp-port");
645 } else {
646 unsigned long v;
4d076222 647
e8fa9fb0
MD
648 errno = 0;
649 v = strtoul(arg, NULL, 0);
650 if (errno != 0 || !isdigit(arg[0])) {
651 ERR("Wrong value in --agent-tcp-port parameter: %s", arg);
652 return -1;
653 }
654 if (v == 0 || v >= 65535) {
655 ERR("Port overflow in --agent-tcp-port parameter: %s", arg);
656 return -1;
657 }
2288467f
JG
658 config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v;
659 DBG3("Agent TCP port set to non default: %i", (int) v);
26296c48 660 }
c0232ea5 661 } else if (string_match(optname, "load") || opt == 'l') {
66b2ce8e
JG
662 if (!arg || *arg == '\0') {
663 ret = -EINVAL;
664 goto end;
665 }
e8fa9fb0
MD
666 if (lttng_is_setuid_setgid()) {
667 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
668 "-l, --load");
669 } else {
e6142f2e
JG
670 config_string_set(&config.load_session_path, strdup(arg));
671 if (!config.load_session_path.value) {
e8fa9fb0
MD
672 PERROR("strdup");
673 ret = -ENOMEM;
674 }
ef367a93 675 }
c0232ea5 676 } else if (string_match(optname, "kmod-probes")) {
66b2ce8e
JG
677 if (!arg || *arg == '\0') {
678 ret = -EINVAL;
679 goto end;
680 }
e8fa9fb0
MD
681 if (lttng_is_setuid_setgid()) {
682 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
683 "--kmod-probes");
684 } else {
e6142f2e
JG
685 config_string_set(&config.kmod_probes_list, strdup(arg));
686 if (!config.kmod_probes_list.value) {
e8fa9fb0
MD
687 PERROR("strdup");
688 ret = -ENOMEM;
689 }
c9d42407 690 }
c0232ea5 691 } else if (string_match(optname, "extra-kmod-probes")) {
66b2ce8e
JG
692 if (!arg || *arg == '\0') {
693 ret = -EINVAL;
694 goto end;
695 }
e8fa9fb0
MD
696 if (lttng_is_setuid_setgid()) {
697 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
698 "--extra-kmod-probes");
699 } else {
e6142f2e
JG
700 config_string_set(&config.kmod_extra_probes_list,
701 strdup(arg));
702 if (!config.kmod_extra_probes_list.value) {
e8fa9fb0
MD
703 PERROR("strdup");
704 ret = -ENOMEM;
705 }
db322c4d 706 }
c0232ea5
JG
707 } else if (string_match(optname, "config") || opt == 'f') {
708 /* This is handled in set_options() thus silent skip. */
709 goto end;
710 } else {
26296c48
JG
711 /* Unknown option or other error.
712 * Error is printed by getopt, just return */
713 ret = -1;
714 }
715
f3dd7ce7 716end:
c5d350b2
JG
717 if (ret == -EINVAL) {
718 const char *opt_name = "unknown";
719 int i;
720
721 for (i = 0; i < sizeof(long_options) / sizeof(struct option);
722 i++) {
723 if (opt == long_options[i].val) {
724 opt_name = long_options[i].name;
725 break;
726 }
727 }
728
729 WARN("Invalid argument provided for option \"%s\", using default value.",
730 opt_name);
731 }
f3dd7ce7 732
26296c48
JG
733 return ret;
734}
735
736/*
737 * config_entry_handler_cb used to handle options read from a config file.
f40ef1d5 738 * See config_entry_handler_cb comment in common/config/session-config.h for the
26296c48
JG
739 * return value conventions.
740 */
741static int config_entry_handler(const struct config_entry *entry, void *unused)
742{
743 int ret = 0, i;
744
745 if (!entry || !entry->name || !entry->value) {
746 ret = -EINVAL;
747 goto end;
748 }
749
750 /* Check if the option is to be ignored */
751 for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) {
752 if (!strcmp(entry->name, config_ignore_options[i])) {
753 goto end;
754 }
755 }
756
757 for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1;
758 i++) {
759
760 /* Ignore if not fully matched. */
761 if (strcmp(entry->name, long_options[i].name)) {
762 continue;
763 }
764
765 /*
766 * If the option takes no argument on the command line, we have to
767 * check if the value is "true". We support non-zero numeric values,
768 * true, on and yes.
769 */
770 if (!long_options[i].has_arg) {
771 ret = config_parse_value(entry->value);
772 if (ret <= 0) {
773 if (ret) {
774 WARN("Invalid configuration value \"%s\" for option %s",
775 entry->value, entry->name);
776 }
777 /* False, skip boolean config option. */
778 goto end;
4d076222 779 }
26296c48
JG
780 }
781
782 ret = set_option(long_options[i].val, entry->value, entry->name);
783 goto end;
784 }
785
786 WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name);
787
788end:
789 return ret;
790}
791
a3bc3918
JR
792static void print_version(void) {
793 fprintf(stdout, "%s\n", VERSION);
794}
795
26296c48
JG
796/*
797 * daemon configuration loading and argument parsing
798 */
799static int set_options(int argc, char **argv)
800{
801 int ret = 0, c = 0, option_index = 0;
802 int orig_optopt = optopt, orig_optind = optind;
803 char *optstring;
804 const char *config_path = NULL;
805
806 optstring = utils_generate_optstring(long_options,
807 sizeof(long_options) / sizeof(struct option));
808 if (!optstring) {
809 ret = -ENOMEM;
810 goto end;
811 }
812
813 /* Check for the --config option */
814 while ((c = getopt_long(argc, argv, optstring, long_options,
815 &option_index)) != -1) {
816 if (c == '?') {
817 ret = -EINVAL;
818 goto end;
819 } else if (c != 'f') {
820 /* if not equal to --config option. */
821 continue;
822 }
823
e8fa9fb0
MD
824 if (lttng_is_setuid_setgid()) {
825 WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.",
826 "-f, --config");
827 } else {
828 config_path = utils_expand_path(optarg);
829 if (!config_path) {
830 ERR("Failed to resolve path: %s", optarg);
831 }
26296c48
JG
832 }
833 }
834
835 ret = config_get_section_entries(config_path, config_section_name,
836 config_entry_handler, NULL);
837 if (ret) {
838 if (ret > 0) {
839 ERR("Invalid configuration option at line %i", ret);
840 ret = -1;
841 }
842 goto end;
843 }
844
845 /* Reset getopt's global state */
846 optopt = orig_optopt;
847 optind = orig_optind;
848 while (1) {
c0232ea5
JG
849 option_index = -1;
850 /*
851 * getopt_long() will not set option_index if it encounters a
852 * short option.
853 */
854 c = getopt_long(argc, argv, optstring, long_options,
855 &option_index);
26296c48 856 if (c == -1) {
4d076222
DG
857 break;
858 }
26296c48 859
c0232ea5
JG
860 /*
861 * Pass NULL as the long option name if popt left the index
862 * unset.
863 */
864 ret = set_option(c, optarg,
865 option_index < 0 ? NULL :
866 long_options[option_index].name);
26296c48
JG
867 if (ret < 0) {
868 break;
fac6795d
DG
869 }
870 }
871
26296c48
JG
872end:
873 free(optstring);
874 return ret;
fac6795d
DG
875}
876
f472090a
JG
877/*
878 * Create lockfile using the rundir and return its fd.
879 */
880static int create_lockfile(void)
881{
882 return utils_create_lock_file(config.lock_file_path.value);
883}
884
fac6795d 885/*
54d01ffb
DG
886 * Check if the global socket is available, and if a daemon is answering at the
887 * other side. If yes, error is returned.
f472090a
JG
888 *
889 * Also attempts to create and hold the lock file.
fac6795d 890 */
cf3af59e 891static int check_existing_daemon(void)
fac6795d 892{
f472090a
JG
893 int ret = 0;
894
7d8234d9 895 /* Is there anybody out there ? */
099e26bd 896 if (lttng_session_daemon_alive()) {
f472090a
JG
897 ret = -EEXIST;
898 goto end;
099e26bd 899 }
b09c7c76 900
f472090a
JG
901 lockfile_fd = create_lockfile();
902 if (lockfile_fd < 0) {
903 ret = -EEXIST;
904 goto end;
905 }
906end:
907 return ret;
908}
909
910static void sessiond_cleanup_lock_file(void)
911{
912 int ret;
913
914 /*
915 * Cleanup lock file by deleting it and finaly closing it which will
916 * release the file system lock.
917 */
918 if (lockfile_fd >= 0) {
919 ret = remove(config.lock_file_path.value);
920 if (ret < 0) {
921 PERROR("remove lock file");
922 }
923 ret = close(lockfile_fd);
924 if (ret < 0) {
925 PERROR("close lock file");
926 }
927 }
fac6795d
DG
928}
929
fac6795d 930/*
d063d709 931 * Set the tracing group gid onto the client socket.
5e16da05 932 *
d063d709 933 * Race window between mkdir and chown is OK because we are going from more
d1613cf5 934 * permissive (root.root) to less permissive (root.tracing).
fac6795d 935 */
be040666 936static int set_permissions(char *rundir)
fac6795d
DG
937{
938 int ret;
996b65c8 939 gid_t gid;
fac6795d 940
28ab59d0
JR
941 ret = utils_get_group_id(config.tracing_group_name.value, true, &gid);
942 if (ret) {
943 /* Default to root group. */
944 gid = 0;
945 }
fac6795d 946
d6f42150 947 /* Set lttng run dir */
be040666 948 ret = chown(rundir, 0, gid);
d6f42150 949 if (ret < 0) {
be040666 950 ERR("Unable to set group on %s", rundir);
76d7553f 951 PERROR("chown");
d6f42150
DG
952 }
953
6c71277b
MD
954 /*
955 * Ensure all applications and tracing group can search the run
956 * dir. Allow everyone to read the directory, since it does not
957 * buy us anything to hide its content.
958 */
959 ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
d1613cf5
JN
960 if (ret < 0) {
961 ERR("Unable to set permissions on %s", rundir);
76d7553f 962 PERROR("chmod");
d1613cf5
JN
963 }
964
d6f42150 965 /* lttng client socket path */
e6142f2e 966 ret = chown(config.client_unix_sock_path.value, 0, gid);
fac6795d 967 if (ret < 0) {
e6142f2e 968 ERR("Unable to set group on %s", config.client_unix_sock_path.value);
76d7553f 969 PERROR("chown");
d6f42150
DG
970 }
971
3bd1e081 972 /* kconsumer error socket path */
6c71277b 973 ret = chown(kconsumer_data.err_unix_sock_path, 0, 0);
d6f42150 974 if (ret < 0) {
3bd1e081 975 ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path);
76d7553f 976 PERROR("chown");
3bd1e081
MD
977 }
978
7753dea8 979 /* 64-bit ustconsumer error socket path */
6c71277b 980 ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0);
7753dea8
MD
981 if (ret < 0) {
982 ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path);
76d7553f 983 PERROR("chown");
7753dea8
MD
984 }
985
986 /* 32-bit ustconsumer compat32 error socket path */
6c71277b 987 ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0);
3bd1e081 988 if (ret < 0) {
7753dea8 989 ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path);
76d7553f 990 PERROR("chown");
fac6795d
DG
991 }
992
d6f42150 993 DBG("All permissions are set");
e07ae692 994
fac6795d
DG
995 return ret;
996}
997
d6f42150 998/*
d063d709 999 * Create the lttng run directory needed for all global sockets and pipe.
d6f42150 1000 */
e6142f2e 1001static int create_lttng_rundir(void)
d6f42150
DG
1002{
1003 int ret;
1004
e6142f2e 1005 DBG3("Creating LTTng run directory: %s", config.rundir.value);
67e40797 1006
e6142f2e 1007 ret = mkdir(config.rundir.value, S_IRWXU);
d6f42150 1008 if (ret < 0) {
b1f11e69 1009 if (errno != EEXIST) {
e6142f2e 1010 ERR("Unable to create %s", config.rundir.value);
b1f11e69
DG
1011 goto error;
1012 } else {
1013 ret = 0;
1014 }
d6f42150
DG
1015 }
1016
1017error:
1018 return ret;
1019}
1020
1021/*
e6142f2e 1022 * Setup sockets and directory needed by the consumerds' communication with the
d063d709 1023 * session daemon.
d6f42150 1024 */
e6142f2e 1025static int set_consumer_sockets(struct consumer_data *consumer_data)
d6f42150
DG
1026{
1027 int ret;
e6142f2e 1028 char *path = NULL;
d6f42150 1029
6c71277b 1030 switch (consumer_data->type) {
7753dea8 1031 case LTTNG_CONSUMER_KERNEL:
e6142f2e 1032 path = config.kconsumerd_path.value;
7753dea8
MD
1033 break;
1034 case LTTNG_CONSUMER64_UST:
e6142f2e 1035 path = config.consumerd64_path.value;
7753dea8
MD
1036 break;
1037 case LTTNG_CONSUMER32_UST:
e6142f2e 1038 path = config.consumerd32_path.value;
7753dea8
MD
1039 break;
1040 default:
1041 ERR("Consumer type unknown");
1042 ret = -EINVAL;
1043 goto error;
d6f42150 1044 }
e6142f2e 1045 assert(path);
d6f42150 1046
67e40797
DG
1047 DBG2("Creating consumer directory: %s", path);
1048
6c71277b 1049 ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP);
e7e1ef17
JR
1050 if (ret < 0 && errno != EEXIST) {
1051 PERROR("mkdir");
1052 ERR("Failed to create %s", path);
1053 goto error;
d6f42150 1054 }
6c71277b 1055 if (is_root) {
28ab59d0
JR
1056 gid_t gid;
1057
1058 ret = utils_get_group_id(config.tracing_group_name.value, true,
1059 &gid);
1060 if (ret) {
1061 /* Default to root group. */
1062 gid = 0;
1063 }
1064
1065 ret = chown(path, 0, gid);
6c71277b
MD
1066 if (ret < 0) {
1067 ERR("Unable to set group on %s", path);
1068 PERROR("chown");
1069 goto error;
1070 }
1071 }
d6f42150 1072
e6142f2e 1073 /* Create the consumerd error unix socket */
3bd1e081
MD
1074 consumer_data->err_sock =
1075 lttcomm_create_unix_sock(consumer_data->err_unix_sock_path);
1076 if (consumer_data->err_sock < 0) {
1077 ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path);
d6f42150
DG
1078 ret = -1;
1079 goto error;
1080 }
1081
a24f05ab
MD
1082 /*
1083 * Set the CLOEXEC flag. Return code is useless because either way, the
1084 * show must go on.
1085 */
1086 ret = utils_set_fd_cloexec(consumer_data->err_sock);
1087 if (ret < 0) {
1088 PERROR("utils_set_fd_cloexec");
1089 /* continue anyway */
1090 }
1091
d6f42150 1092 /* File permission MUST be 660 */
3bd1e081 1093 ret = chmod(consumer_data->err_unix_sock_path,
54d01ffb 1094 S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP);
d6f42150 1095 if (ret < 0) {
3bd1e081 1096 ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path);
67e40797 1097 PERROR("chmod");
d6f42150
DG
1098 goto error;
1099 }
1100
1101error:
1102 return ret;
1103}
1104
fac6795d 1105/*
d063d709 1106 * Signal handler for the daemon
cf3af59e 1107 *
54d01ffb
DG
1108 * Simply stop all worker threads, leaving main() return gracefully after
1109 * joining all threads and calling cleanup().
fac6795d
DG
1110 */
1111static void sighandler(int sig)
1112{
1113 switch (sig) {
cf3af59e 1114 case SIGINT:
af87c45a 1115 DBG("SIGINT caught");
cf3af59e
MD
1116 stop_threads();
1117 break;
1118 case SIGTERM:
af87c45a 1119 DBG("SIGTERM caught");
cf3af59e
MD
1120 stop_threads();
1121 break;
0bb7724a
DG
1122 case SIGUSR1:
1123 CMM_STORE_SHARED(recv_child_signal, 1);
1124 break;
cf3af59e
MD
1125 default:
1126 break;
fac6795d 1127 }
fac6795d
DG
1128}
1129
1130/*
d063d709 1131 * Setup signal handler for :
1d4b027a 1132 * SIGINT, SIGTERM, SIGPIPE
fac6795d 1133 */
1d4b027a 1134static int set_signal_handler(void)
fac6795d 1135{
1d4b027a
DG
1136 int ret = 0;
1137 struct sigaction sa;
1138 sigset_t sigset;
fac6795d 1139
1d4b027a 1140 if ((ret = sigemptyset(&sigset)) < 0) {
76d7553f 1141 PERROR("sigemptyset");
1d4b027a
DG
1142 return ret;
1143 }
d6f42150 1144
1d4b027a
DG
1145 sa.sa_mask = sigset;
1146 sa.sa_flags = 0;
0072e5e2
MD
1147
1148 sa.sa_handler = sighandler;
1d4b027a 1149 if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) {
76d7553f 1150 PERROR("sigaction");
1d4b027a 1151 return ret;
d6f42150
DG
1152 }
1153
1d4b027a 1154 if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) {
76d7553f 1155 PERROR("sigaction");
1d4b027a 1156 return ret;
d6f42150 1157 }
aaf26714 1158
0072e5e2 1159 if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) {
76d7553f 1160 PERROR("sigaction");
1d4b027a 1161 return ret;
8c0faa1d
DG
1162 }
1163
0072e5e2
MD
1164 sa.sa_handler = SIG_IGN;
1165 if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) {
0bb7724a
DG
1166 PERROR("sigaction");
1167 return ret;
1168 }
1169
1170 DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT");
1d4b027a
DG
1171
1172 return ret;
fac6795d
DG
1173}
1174
f3ed775e 1175/*
d063d709 1176 * Set open files limit to unlimited. This daemon can open a large number of
514bb9f0 1177 * file descriptors in order to consume multiple kernel traces.
f3ed775e
DG
1178 */
1179static void set_ulimit(void)
1180{
1181 int ret;
1182 struct rlimit lim;
1183
514bb9f0 1184 /* The kernel does not allow an infinite limit for open files */
f3ed775e
DG
1185 lim.rlim_cur = 65535;
1186 lim.rlim_max = 65535;
1187
1188 ret = setrlimit(RLIMIT_NOFILE, &lim);
1189 if (ret < 0) {
76d7553f 1190 PERROR("failed to set open files limit");
f3ed775e
DG
1191 }
1192}
1193
4a15001e 1194static int write_pidfile(void)
35f90c40 1195{
e6142f2e 1196 return utils_create_pid_file(getpid(), config.pid_file_path.value);
35f90c40
DG
1197}
1198
e6142f2e
JG
1199static int set_clock_plugin_env(void)
1200{
1201 int ret = 0;
1202 char *env_value = NULL;
cd9290dd 1203
e6142f2e
JG
1204 if (!config.lttng_ust_clock_plugin.value) {
1205 goto end;
1206 }
1207
1208 ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s",
1209 config.lttng_ust_clock_plugin.value);
cd9290dd 1210 if (ret < 0) {
e6142f2e
JG
1211 PERROR("asprintf");
1212 goto end;
cd9290dd
DG
1213 }
1214
e6142f2e
JG
1215 ret = putenv(env_value);
1216 if (ret) {
1217 free(env_value);
1218 PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN");
1219 goto end;
1220 }
cd9290dd 1221
e6142f2e
JG
1222 DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"",
1223 config.lttng_ust_clock_plugin.value);
1224end:
4a15001e 1225 return ret;
ef367a93
JG
1226}
1227
99d688f2
JG
1228static void destroy_all_sessions_and_wait(void)
1229{
1230 struct ltt_session *session, *tmp;
1231 struct ltt_session_list *session_list;
1232
1233 session_list = session_get_list();
1234 DBG("Initiating destruction of all sessions");
1235
1236 if (!session_list) {
1237 return;
1238 }
1239
99d688f2
JG
1240 session_lock_list();
1241 /* Initiate the destruction of all sessions. */
1242 cds_list_for_each_entry_safe(session, tmp,
1243 &session_list->head, list) {
1244 if (!session_get(session)) {
1245 continue;
1246 }
1247
1248 session_lock(session);
1249 if (session->destroyed) {
1250 goto unlock_session;
1251 }
63763958 1252 (void) cmd_stop_trace(session);
3e3665b8
JG
1253 (void) cmd_destroy_session(session, notification_thread_handle,
1254 NULL);
99d688f2
JG
1255 unlock_session:
1256 session_unlock(session);
1257 session_put(session);
1258 }
1259 session_unlock_list();
1260
1261 /* Wait for the destruction of all sessions to complete. */
1262 DBG("Waiting for the destruction of all sessions to complete");
1263 session_list_wait_empty();
1264 DBG("Destruction of all sessions completed");
1265}
1266
929f71ec
JG
1267static int run_as_worker_post_fork_cleanup(void *data)
1268{
1269 struct sessiond_config *sessiond_config = data;
1270
1271 sessiond_config_fini(sessiond_config);
1272 return 0;
1273}
1274
1275static int launch_run_as_worker(const char *procname)
1276{
1277 /*
1278 * Clean-up before forking the run-as worker. Any dynamically
1279 * allocated memory of which the worker is not aware will
1280 * be leaked as the process forks a run-as worker (and performs
1281 * no exec*()). The same would apply to any opened fd.
1282 */
1283 return run_as_create_worker(procname, run_as_worker_post_fork_cleanup,
1284 &config);
1285}
1286
52a0e931
JG
1287static void sessiond_uuid_log(void)
1288{
c70636a7 1289 char uuid_str[LTTNG_UUID_STR_LEN];
52a0e931
JG
1290
1291 lttng_uuid_to_str(sessiond_uuid, uuid_str);
1292 DBG("Starting lttng-sessiond {%s}", uuid_str);
1293}
1294
fac6795d
DG
1295/*
1296 * main
1297 */
1298int main(int argc, char **argv)
1299{
4a15001e 1300 int ret = 0, retval = 0;
e6142f2e 1301 const char *env_app_timeout;
b3530820
JG
1302 struct lttng_pipe *ust32_channel_monitor_pipe = NULL,
1303 *ust64_channel_monitor_pipe = NULL,
1304 *kernel_channel_monitor_pipe = NULL;
a3707772 1305 struct lttng_thread *ht_cleanup_thread = NULL;
bc26e826 1306 struct timer_thread_parameters timer_thread_parameters;
64d9b072
JG
1307 /* Rotation thread handle. */
1308 struct rotation_thread_handle *rotation_thread_handle = NULL;
d086f507
JD
1309 /* Queue of rotation jobs populated by the sessiond-timer. */
1310 struct rotation_thread_timer_queue *rotation_timer_queue = NULL;
917a718d 1311 struct lttng_thread *client_thread = NULL;
4a91420c 1312 struct lttng_thread *notification_thread = NULL;
bd9addf7 1313 struct lttng_thread *register_apps_thread = NULL;
fac6795d 1314
335a95b7
MD
1315 init_kernel_workarounds();
1316
f6a9efaa
DG
1317 rcu_register_thread();
1318
4a15001e
MD
1319 if (set_signal_handler()) {
1320 retval = -1;
1321 goto exit_set_signal_handler;
0bb7724a
DG
1322 }
1323
92816cc3 1324 if (timer_signal_init()) {
d086f507
JD
1325 retval = -1;
1326 goto exit_set_signal_handler;
1327 }
1328
12744796
DG
1329 page_size = sysconf(_SC_PAGESIZE);
1330 if (page_size < 0) {
1331 PERROR("sysconf _SC_PAGESIZE");
1332 page_size = LONG_MAX;
1333 WARN("Fallback page size to %ld", page_size);
1334 }
1335
e6142f2e
JG
1336 ret = sessiond_config_init(&config);
1337 if (ret) {
1338 retval = -1;
1339 goto exit_set_signal_handler;
1340 }
1341
2788b494
JR
1342 /*
1343 * Init config from environment variables.
1344 * Command line option override env configuration per-doc. Do env first.
1345 */
1346 sessiond_config_apply_env_config(&config);
1347
4a15001e
MD
1348 /*
1349 * Parse arguments and load the daemon configuration file.
1350 *
1351 * We have an exit_options exit path to free memory reserved by
1352 * set_options. This is needed because the rest of sessiond_cleanup()
1353 * depends on ht_cleanup_thread, which depends on lttng_daemonize, which
1354 * depends on set_options.
1355 */
fac6795d 1356 progname = argv[0];
4a15001e
MD
1357 if (set_options(argc, argv)) {
1358 retval = -1;
1359 goto exit_options;
fac6795d
DG
1360 }
1361
e6142f2e
JG
1362 /*
1363 * Resolve all paths received as arguments, configuration option, or
1364 * through environment variable as absolute paths. This is necessary
1365 * since daemonizing causes the sessiond's current working directory
1366 * to '/'.
1367 */
1368 ret = sessiond_config_resolve_paths(&config);
1369 if (ret) {
1370 goto exit_options;
1371 }
1372
1373 /* Apply config. */
1374 lttng_opt_verbose = config.verbose;
1375 lttng_opt_quiet = config.quiet;
1376 kconsumer_data.err_unix_sock_path =
1377 config.kconsumerd_err_unix_sock_path.value;
1378 kconsumer_data.cmd_unix_sock_path =
1379 config.kconsumerd_cmd_unix_sock_path.value;
1380 ustconsumer32_data.err_unix_sock_path =
1381 config.consumerd32_err_unix_sock_path.value;
1382 ustconsumer32_data.cmd_unix_sock_path =
1383 config.consumerd32_cmd_unix_sock_path.value;
1384 ustconsumer64_data.err_unix_sock_path =
1385 config.consumerd64_err_unix_sock_path.value;
1386 ustconsumer64_data.cmd_unix_sock_path =
1387 config.consumerd64_cmd_unix_sock_path.value;
1388 set_clock_plugin_env();
1389
1390 sessiond_config_log(&config);
52a0e931 1391 sessiond_uuid_log();
e6142f2e 1392
a3bc3918
JR
1393 if (opt_print_version) {
1394 print_version();
1395 retval = 0;
1396 goto exit_options;
1397 }
1398
f472090a
JG
1399 if (create_lttng_rundir()) {
1400 retval = -1;
1401 goto exit_options;
1402 }
1403
1404 /* Abort launch if a session daemon is already running. */
1405 if (check_existing_daemon()) {
1406 ERR("A session daemon is already running.");
1407 retval = -1;
1408 goto exit_options;
1409 }
1410
fac6795d 1411 /* Daemonize */
e6142f2e 1412 if (config.daemonize || config.background) {
ceed52b5
MD
1413 int i;
1414
72dd7491 1415 ret = lttng_daemonize(&child_ppid, &recv_child_signal,
e6142f2e 1416 !config.background);
53094c05 1417 if (ret < 0) {
4a15001e
MD
1418 retval = -1;
1419 goto exit_options;
53094c05 1420 }
0bb7724a 1421
ceed52b5 1422 /*
0bb7724a 1423 * We are in the child. Make sure all other file descriptors are
4a15001e 1424 * closed, in case we are called with more opened file
f472090a 1425 * descriptors than the standard ones and the lock file.
ceed52b5
MD
1426 */
1427 for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) {
f472090a
JG
1428 if (i == lockfile_fd) {
1429 continue;
1430 }
ceed52b5
MD
1431 (void) close(i);
1432 }
1433 }
1434
929f71ec 1435 if (launch_run_as_worker(argv[0]) < 0) {
7567352f
MD
1436 goto exit_create_run_as_worker_cleanup;
1437 }
1438
4a15001e
MD
1439 /*
1440 * Starting from here, we can create threads. This needs to be after
1441 * lttng_daemonize due to RCU.
1442 */
1443
1444 /*
1445 * Initialize the health check subsystem. This call should set the
1446 * appropriate time values.
1447 */
1448 health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES);
1449 if (!health_sessiond) {
1450 PERROR("health_app_create error");
1451 retval = -1;
0d64e8fb 1452 goto stop_threads;
4a15001e
MD
1453 }
1454
4a15001e 1455 /* Create thread to clean up RCU hash tables */
a3707772
JG
1456 ht_cleanup_thread = launch_ht_cleanup_thread();
1457 if (!ht_cleanup_thread) {
4a15001e 1458 retval = -1;
0d64e8fb 1459 goto stop_threads;
4a15001e
MD
1460 }
1461
ceed52b5 1462 /* Create thread quit pipe */
a7333da7 1463 if (sessiond_init_thread_quit_pipe()) {
4a15001e 1464 retval = -1;
0d64e8fb 1465 goto stop_threads;
fac6795d
DG
1466 }
1467
1468 /* Check if daemon is UID = 0 */
1469 is_root = !getuid();
fac6795d 1470 if (is_root) {
67e40797 1471 /* Create global run dir with root access */
67e40797 1472
b3530820
JG
1473 kernel_channel_monitor_pipe = lttng_pipe_open(0);
1474 if (!kernel_channel_monitor_pipe) {
1475 ERR("Failed to create kernel consumer channel monitor pipe");
1476 retval = -1;
0d64e8fb 1477 goto stop_threads;
b3530820
JG
1478 }
1479 kconsumer_data.channel_monitor_pipe =
1480 lttng_pipe_release_writefd(
1481 kernel_channel_monitor_pipe);
1482 if (kconsumer_data.channel_monitor_pipe < 0) {
1483 retval = -1;
0d64e8fb 1484 goto stop_threads;
b3530820 1485 }
fac6795d
DG
1486 }
1487
5c827ce0
DG
1488 /* Set consumer initial state */
1489 kernel_consumerd_state = CONSUMER_STOPPED;
1490 ust_consumerd_state = CONSUMER_STOPPED;
1491
b3530820
JG
1492 ust32_channel_monitor_pipe = lttng_pipe_open(0);
1493 if (!ust32_channel_monitor_pipe) {
1494 ERR("Failed to create 32-bit user space consumer channel monitor pipe");
1495 retval = -1;
0d64e8fb 1496 goto stop_threads;
b3530820
JG
1497 }
1498 ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd(
1499 ust32_channel_monitor_pipe);
1500 if (ustconsumer32_data.channel_monitor_pipe < 0) {
1501 retval = -1;
0d64e8fb 1502 goto stop_threads;
b3530820 1503 }
62c43103 1504
d086f507 1505 /*
92816cc3
JG
1506 * The rotation_thread_timer_queue structure is shared between the
1507 * sessiond timer thread and the rotation thread. The main thread keeps
1508 * its ownership and destroys it when both threads have been joined.
d086f507 1509 */
92816cc3 1510 rotation_timer_queue = rotation_thread_timer_queue_create();
d086f507
JD
1511 if (!rotation_timer_queue) {
1512 retval = -1;
0d64e8fb 1513 goto stop_threads;
d086f507 1514 }
bc26e826
JG
1515 timer_thread_parameters.rotation_thread_job_queue =
1516 rotation_timer_queue;
67e40797 1517
b3530820
JG
1518 ust64_channel_monitor_pipe = lttng_pipe_open(0);
1519 if (!ust64_channel_monitor_pipe) {
1520 ERR("Failed to create 64-bit user space consumer channel monitor pipe");
1521 retval = -1;
0d64e8fb 1522 goto stop_threads;
b3530820
JG
1523 }
1524 ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd(
1525 ust64_channel_monitor_pipe);
1526 if (ustconsumer64_data.channel_monitor_pipe < 0) {
1527 retval = -1;
0d64e8fb 1528 goto stop_threads;
b3530820 1529 }
847177cd 1530
1427f9b2
DG
1531 /*
1532 * Init UST app hash table. Alloc hash table before this point since
1533 * cleanup() can get called after that point.
1534 */
4a15001e 1535 if (ust_app_ht_alloc()) {
ddbeb0f6 1536 ERR("Failed to allocate UST app hash table");
4a15001e 1537 retval = -1;
0d64e8fb 1538 goto stop_threads;
4a15001e 1539 }
1427f9b2 1540
6a4e4039
JG
1541 /*
1542 * Initialize agent app hash table. We allocate the hash table here
1543 * since cleanup() can get called after this point.
1544 */
1545 if (agent_app_ht_alloc()) {
1546 ERR("Failed to allocate Agent app hash table");
4a15001e 1547 retval = -1;
0d64e8fb 1548 goto stop_threads;
f20baf8e
DG
1549 }
1550
a88df331
DG
1551 /*
1552 * These actions must be executed as root. We do that *after* setting up
1553 * the sockets path because we MUST make the check for another daemon using
1554 * those paths *before* trying to set the kernel consumer sockets and init
1555 * kernel tracer.
1556 */
1557 if (is_root) {
e6142f2e 1558 if (set_consumer_sockets(&kconsumer_data)) {
4a15001e 1559 retval = -1;
0d64e8fb 1560 goto stop_threads;
7753dea8
MD
1561 }
1562
a88df331 1563 /* Setup kernel tracer */
e6142f2e 1564 if (!config.no_kernel) {
4fba7219
DG
1565 init_kernel_tracer();
1566 }
a88df331
DG
1567
1568 /* Set ulimit for open files */
1569 set_ulimit();
fac6795d 1570 }
4063050c
MD
1571 /* init lttng_fd tracking must be done after set_ulimit. */
1572 lttng_fd_init();
fac6795d 1573
e6142f2e 1574 if (set_consumer_sockets(&ustconsumer64_data)) {
4a15001e 1575 retval = -1;
0d64e8fb 1576 goto stop_threads;
67e40797
DG
1577 }
1578
e6142f2e 1579 if (set_consumer_sockets(&ustconsumer32_data)) {
4a15001e 1580 retval = -1;
0d64e8fb 1581 goto stop_threads;
67e40797
DG
1582 }
1583
5b8719f5 1584 /* Get parent pid if -S, --sig-parent is specified. */
e6142f2e 1585 if (config.sig_parent) {
5b8719f5
DG
1586 ppid = getppid();
1587 }
1588
7a485870 1589 /* Setup the kernel pipe for waking up the kernel thread */
e6142f2e 1590 if (is_root && !config.no_kernel) {
4a15001e
MD
1591 if (utils_create_pipe_cloexec(kernel_poll_pipe)) {
1592 retval = -1;
0d64e8fb 1593 goto stop_threads;
6620da75 1594 }
7a485870
DG
1595 }
1596
099e26bd 1597 /* Setup the thread apps communication pipe. */
4a15001e
MD
1598 if (utils_create_pipe_cloexec(apps_cmd_pipe)) {
1599 retval = -1;
0d64e8fb 1600 goto stop_threads;
099e26bd
DG
1601 }
1602
d0b96690 1603 /* Setup the thread apps notify communication pipe. */
4a15001e
MD
1604 if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) {
1605 retval = -1;
0d64e8fb 1606 goto stop_threads;
d0b96690
DG
1607 }
1608
7972aab2
DG
1609 /* Initialize global buffer per UID and PID registry. */
1610 buffer_reg_init_uid_registry();
1611 buffer_reg_init_pid_registry();
1612
099e26bd 1613 /* Init UST command queue. */
8bdee6e2 1614 cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail);
099e26bd 1615
2f77fc4b 1616 cmd_init();
00e2e675 1617
ae9e45b3
DG
1618 /* Check for the application socket timeout env variable. */
1619 env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV);
1620 if (env_app_timeout) {
e6142f2e 1621 config.app_socket_timeout = atoi(env_app_timeout);
ae9e45b3 1622 } else {
e6142f2e 1623 config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT;
ae9e45b3
DG
1624 }
1625
4a15001e
MD
1626 ret = write_pidfile();
1627 if (ret) {
1628 ERR("Error in write_pidfile");
1629 retval = -1;
0d64e8fb 1630 goto stop_threads;
4a15001e 1631 }
35f90c40 1632
554831e7
MD
1633 /* Initialize communication library */
1634 lttcomm_init();
4a15001e 1635 /* Initialize TCP timeout values */
d831c249 1636 lttcomm_inet_init();
554831e7 1637
12b4fb37 1638 /* Create health-check thread. */
173fca4f 1639 if (!launch_health_management_thread()) {
4a15001e 1640 retval = -1;
0d64e8fb 1641 goto stop_threads;
44a5e5eb
DG
1642 }
1643
b3530820
JG
1644 /* notification_thread_data acquires the pipes' read side. */
1645 notification_thread_handle = notification_thread_handle_create(
1646 ust32_channel_monitor_pipe,
1647 ust64_channel_monitor_pipe,
c8a9de5a 1648 kernel_channel_monitor_pipe);
b3530820
JG
1649 if (!notification_thread_handle) {
1650 retval = -1;
1651 ERR("Failed to create notification thread shared data");
0d64e8fb 1652 goto stop_threads;
b3530820
JG
1653 }
1654
1655 /* Create notification thread. */
4a91420c
JG
1656 notification_thread = launch_notification_thread(
1657 notification_thread_handle);
1658 if (!notification_thread) {
b3530820 1659 retval = -1;
0d64e8fb 1660 goto stop_threads;
b3530820
JG
1661 }
1662
d086f507 1663 /* Create timer thread. */
bc26e826 1664 if (!launch_timer_thread(&timer_thread_parameters)) {
d086f507 1665 retval = -1;
0d64e8fb 1666 goto stop_threads;
d086f507 1667 }
d086f507 1668
db66e574
JD
1669 /* rotation_thread_data acquires the pipes' read side. */
1670 rotation_thread_handle = rotation_thread_handle_create(
90936dcf 1671 rotation_timer_queue,
c8a9de5a 1672 notification_thread_handle);
db66e574
JD
1673 if (!rotation_thread_handle) {
1674 retval = -1;
1675 ERR("Failed to create rotation thread shared data");
1676 stop_threads();
0d64e8fb 1677 goto stop_threads;
db66e574 1678 }
db66e574
JD
1679
1680 /* Create rotation thread. */
64d9b072 1681 if (!launch_rotation_thread(rotation_thread_handle)) {
db66e574 1682 retval = -1;
0d64e8fb 1683 goto stop_threads;
db66e574
JD
1684 }
1685
cf3af59e 1686 /* Create thread to manage the client socket */
917a718d
JG
1687 client_thread = launch_client_thread();
1688 if (!client_thread) {
4a15001e 1689 retval = -1;
0d64e8fb 1690 goto stop_threads;
cf3af59e 1691 }
fac6795d 1692
308df7bb
JG
1693 /* Set credentials of the client socket and rundir */
1694 if (is_root && set_permissions(config.rundir.value)) {
1695 retval = -1;
1696 goto stop_threads;
1697 }
1698
5d1b0219
JG
1699 if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1],
1700 apps_cmd_notify_pipe[1])) {
4a15001e 1701 retval = -1;
0d64e8fb 1702 goto stop_threads;
099e26bd
DG
1703 }
1704
1705 /* Create thread to manage application registration. */
bd9addf7
JG
1706 register_apps_thread = launch_application_registration_thread(
1707 &ust_cmd_queue);
1708 if (!register_apps_thread) {
4a15001e 1709 retval = -1;
0d64e8fb 1710 goto stop_threads;
099e26bd
DG
1711 }
1712
cf3af59e 1713 /* Create thread to manage application socket */
7649924e 1714 if (!launch_application_management_thread(apps_cmd_pipe[0])) {
4a15001e 1715 retval = -1;
0d64e8fb 1716 goto stop_threads;
d0b96690
DG
1717 }
1718
1719 /* Create thread to manage application notify socket */
971a61c6 1720 if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) {
4a15001e 1721 retval = -1;
0d64e8fb 1722 goto stop_threads;
cf3af59e 1723 }
fac6795d 1724
8a7e4590
JG
1725 /* Create agent management thread. */
1726 if (!launch_agent_management_thread()) {
4a15001e 1727 retval = -1;
0d64e8fb 1728 goto stop_threads;
4d076222
DG
1729 }
1730
6620da75 1731 /* Don't start this thread if kernel tracing is not requested nor root */
e6142f2e 1732 if (is_root && !config.no_kernel) {
6620da75 1733 /* Create kernel thread to manage kernel event */
5b093681 1734 if (!launch_kernel_management_thread(kernel_poll_pipe[0])) {
4a15001e 1735 retval = -1;
0d64e8fb 1736 goto stop_threads;
6620da75 1737 }
ef367a93 1738 }
7a485870 1739
3316b9d6
JG
1740 /* Load sessions. */
1741 ret = config_load_session(config.load_session_path.value,
1742 NULL, 1, 1, NULL);
4a15001e 1743 if (ret) {
3316b9d6 1744 ERR("Session load failed: %s", error_get_str(ret));
4a15001e 1745 retval = -1;
0d64e8fb 1746 goto stop_threads;
4a15001e
MD
1747 }
1748
3316b9d6
JG
1749 /* Initialization completed. */
1750 sessiond_signal_parents();
1751
4a15001e
MD
1752 /*
1753 * This is where we start awaiting program completion (e.g. through
1754 * signal that asks threads to teardown).
1755 */
1756
99d688f2 1757 /* Initiate teardown once activity occurs on the quit pipe. */
2d54bfb6 1758 sessiond_wait_for_quit_pipe(-1);
917a718d 1759
0d64e8fb 1760stop_threads:
917a718d
JG
1761 /*
1762 * Ensure that the client thread is no longer accepting new commands,
1763 * which could cause new sessions to be created.
1764 */
0d64e8fb
JG
1765 if (client_thread) {
1766 lttng_thread_shutdown(client_thread);
917a718d 1767 lttng_thread_put(client_thread);
917a718d
JG
1768 }
1769
99d688f2 1770 destroy_all_sessions_and_wait();
0d64e8fb 1771
bd9addf7
JG
1772 if (register_apps_thread) {
1773 lttng_thread_shutdown(register_apps_thread);
1774 lttng_thread_put(register_apps_thread);
1775 }
a3707772 1776 lttng_thread_list_shutdown_orphans();
917a718d 1777
4d62fbf8
MD
1778 /*
1779 * Wait for all pending call_rcu work to complete before tearing
1780 * down data structures. call_rcu worker may be trying to
1781 * perform lookups in those structures.
1782 */
1783 rcu_barrier();
4a15001e
MD
1784 /*
1785 * sessiond_cleanup() is called when no other thread is running, except
1786 * the ht_cleanup thread, which is needed to destroy the hash tables.
1787 */
1788 rcu_thread_online();
1789 sessiond_cleanup();
06f525de 1790
4a91420c
JG
1791 if (notification_thread) {
1792 lttng_thread_shutdown(notification_thread);
1793 lttng_thread_put(notification_thread);
1794 }
1795
c4d5de9d
JG
1796 /*
1797 * Ensure all prior call_rcu are done. call_rcu callbacks may push
1798 * hash tables to the ht_cleanup thread. Therefore, we ensure that
1799 * the queue is empty before shutting down the clean-up thread.
1800 */
1801 rcu_barrier();
1802
a3707772
JG
1803 if (ht_cleanup_thread) {
1804 lttng_thread_shutdown(ht_cleanup_thread);
1805 lttng_thread_put(ht_cleanup_thread);
1806 }
1807
64d9b072
JG
1808 rcu_thread_offline();
1809 rcu_unregister_thread();
1810
1811 if (rotation_thread_handle) {
1812 rotation_thread_handle_destroy(rotation_thread_handle);
1813 }
1814
d086f507
JD
1815 /*
1816 * After the rotation and timer thread have quit, we can safely destroy
1817 * the rotation_timer_queue.
1818 */
92816cc3 1819 rotation_thread_timer_queue_destroy(rotation_timer_queue);
c8a9de5a
JG
1820 /*
1821 * The teardown of the notification system is performed after the
1822 * session daemon's teardown in order to allow it to be notified
1823 * of the active session and channels at the moment of the teardown.
1824 */
1825 if (notification_thread_handle) {
1826 notification_thread_handle_destroy(notification_thread_handle);
1827 }
b3530820
JG
1828 lttng_pipe_destroy(ust32_channel_monitor_pipe);
1829 lttng_pipe_destroy(ust64_channel_monitor_pipe);
1830 lttng_pipe_destroy(kernel_channel_monitor_pipe);
4a15001e 1831
9bc2ec5f
JR
1832 if (health_sessiond) {
1833 health_app_destroy(health_sessiond);
1834 }
7567352f 1835exit_create_run_as_worker_cleanup:
4a15001e 1836exit_options:
f472090a 1837 sessiond_cleanup_lock_file();
4a15001e
MD
1838 sessiond_cleanup_options();
1839
1840exit_set_signal_handler:
1841 if (!retval) {
cf3af59e 1842 exit(EXIT_SUCCESS);
4a15001e
MD
1843 } else {
1844 exit(EXIT_FAILURE);
67e40797 1845 }
fac6795d 1846}
This page took 0.358995 seconds and 4 git commands to generate.