Commit | Line | Data |
---|---|---|
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" |
096102bd | 64 | #include "modprobe.h" |
0fdd1e2c | 65 | #include "shm.h" |
1e307fab | 66 | #include "ust-ctl.h" |
00e2e675 | 67 | #include "ust-consumer.h" |
8e68d1c8 | 68 | #include "utils.h" |
4063050c | 69 | #include "fd-limit.h" |
8782cc74 | 70 | #include "health-sessiond.h" |
8ac94142 | 71 | #include "testpoint.h" |
d0b96690 | 72 | #include "ust-thread.h" |
022d91ba | 73 | #include "agent-thread.h" |
fb198a11 | 74 | #include "save.h" |
ef367a93 | 75 | #include "load-session-thread.h" |
b3530820 JG |
76 | #include "notification-thread.h" |
77 | #include "notification-thread-commands.h" | |
db66e574 | 78 | #include "rotation-thread.h" |
0dbc2034 | 79 | #include "lttng-syscall.h" |
7c1d2758 | 80 | #include "agent.h" |
5e97de00 | 81 | #include "ht-cleanup.h" |
e6142f2e | 82 | #include "sessiond-config.h" |
432b38d7 | 83 | #include "timer.h" |
548468b9 | 84 | #include "thread.h" |
050e613c | 85 | #include "client.h" |
dd5875e7 | 86 | #include "dispatch.h" |
22b80785 | 87 | #include "register.h" |
cdffb210 | 88 | #include "manage-apps.h" |
ebaeda94 | 89 | |
4fc83d94 PP |
90 | static const char *help_msg = |
91 | #ifdef LTTNG_EMBED_HELP | |
92 | #include <lttng-sessiond.8.h> | |
93 | #else | |
94 | NULL | |
95 | #endif | |
96 | ; | |
97 | ||
fac6795d | 98 | const char *progname; |
c9cb3e7d | 99 | static int lockfile_fd = -1; |
3bd1e081 | 100 | |
0bb7724a DG |
101 | /* Set to 1 when a SIGUSR1 signal is received. */ |
102 | static int recv_child_signal; | |
103 | ||
26296c48 JG |
104 | /* Command line options */ |
105 | static const struct option long_options[] = { | |
0f5ea17c JG |
106 | { "client-sock", required_argument, 0, 'c' }, |
107 | { "apps-sock", required_argument, 0, 'a' }, | |
108 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
109 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
110 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
111 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
112 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
113 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
114 | { "consumerd32-path", required_argument, 0, '\0' }, | |
115 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
116 | { "consumerd64-path", required_argument, 0, '\0' }, | |
117 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
118 | { "daemonize", no_argument, 0, 'd' }, | |
119 | { "background", no_argument, 0, 'b' }, | |
120 | { "sig-parent", no_argument, 0, 'S' }, | |
121 | { "help", no_argument, 0, 'h' }, | |
122 | { "group", required_argument, 0, 'g' }, | |
123 | { "version", no_argument, 0, 'V' }, | |
124 | { "quiet", no_argument, 0, 'q' }, | |
125 | { "verbose", no_argument, 0, 'v' }, | |
126 | { "verbose-consumer", no_argument, 0, '\0' }, | |
127 | { "no-kernel", no_argument, 0, '\0' }, | |
128 | { "pidfile", required_argument, 0, 'p' }, | |
129 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
130 | { "config", required_argument, 0, 'f' }, | |
131 | { "load", required_argument, 0, 'l' }, | |
132 | { "kmod-probes", required_argument, 0, '\0' }, | |
133 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
134 | { NULL, 0, 0, 0 } |
135 | }; | |
136 | ||
137 | /* Command line options to ignore from configuration file */ | |
138 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
1d4b027a | 139 | |
099e26bd DG |
140 | /* |
141 | * This pipe is used to inform the thread managing application communication | |
142 | * that a command is queued and ready to be processed. | |
143 | */ | |
76d7553f | 144 | static int apps_cmd_pipe[2] = { -1, -1 }; |
53c51aaa | 145 | static int apps_cmd_notify_pipe[2] = { -1, -1 }; |
099e26bd | 146 | |
1d4b027a | 147 | /* Pthread, Mutexes and Semaphores */ |
7a485870 | 148 | static pthread_t kernel_thread; |
ef367a93 | 149 | static pthread_t load_session_thread; |
5eb91c98 | 150 | |
099e26bd DG |
151 | /* |
152 | * UST registration command queue. This queue is tied with a futex and uses a N | |
153 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
154 | * | |
b22c5da8 DG |
155 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
156 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
157 | * the line new application socket and monitors it for any I/O error or clean | |
158 | * close that triggers an unregistration of the application. | |
099e26bd DG |
159 | */ |
160 | static struct ust_cmd_queue ust_cmd_queue; | |
161 | ||
2f77fc4b DG |
162 | static const char *module_proc_lttng = "/proc/lttng"; |
163 | ||
ef367a93 | 164 | /* Load session thread information to operate. */ |
51bb4dbb | 165 | static struct load_session_thread_data *load_info; |
7c1d2758 | 166 | |
97bc1426 | 167 | /* |
51bb4dbb | 168 | * Section name to look for in the daemon configuration file. |
97bc1426 | 169 | */ |
51bb4dbb | 170 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 171 | |
51bb4dbb JG |
172 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
173 | static int is_root; | |
5eb91c98 | 174 | |
099e26bd DG |
175 | /* |
176 | * Stop all threads by closing the thread quit pipe. | |
177 | */ | |
cf3af59e MD |
178 | static void stop_threads(void) |
179 | { | |
5eb91c98 DG |
180 | int ret; |
181 | ||
cf3af59e MD |
182 | /* Stopping all threads */ |
183 | DBG("Terminating all threads"); | |
51bb4dbb | 184 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
185 | if (ret < 0) { |
186 | ERR("write error on thread quit pipe"); | |
187 | } | |
cf3af59e MD |
188 | } |
189 | ||
e975f9f8 DG |
190 | /* |
191 | * Close every consumer sockets. | |
192 | */ | |
193 | static void close_consumer_sockets(void) | |
194 | { | |
195 | int ret; | |
196 | ||
197 | if (kconsumer_data.err_sock >= 0) { | |
198 | ret = close(kconsumer_data.err_sock); | |
199 | if (ret < 0) { | |
200 | PERROR("kernel consumer err_sock close"); | |
201 | } | |
202 | } | |
203 | if (ustconsumer32_data.err_sock >= 0) { | |
204 | ret = close(ustconsumer32_data.err_sock); | |
205 | if (ret < 0) { | |
a76cbd9f | 206 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
207 | } |
208 | } | |
209 | if (ustconsumer64_data.err_sock >= 0) { | |
210 | ret = close(ustconsumer64_data.err_sock); | |
211 | if (ret < 0) { | |
a76cbd9f | 212 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
213 | } |
214 | } | |
215 | if (kconsumer_data.cmd_sock >= 0) { | |
216 | ret = close(kconsumer_data.cmd_sock); | |
217 | if (ret < 0) { | |
218 | PERROR("kernel consumer cmd_sock close"); | |
219 | } | |
220 | } | |
221 | if (ustconsumer32_data.cmd_sock >= 0) { | |
222 | ret = close(ustconsumer32_data.cmd_sock); | |
223 | if (ret < 0) { | |
a76cbd9f | 224 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
225 | } |
226 | } | |
227 | if (ustconsumer64_data.cmd_sock >= 0) { | |
228 | ret = close(ustconsumer64_data.cmd_sock); | |
229 | if (ret < 0) { | |
a76cbd9f | 230 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
231 | } |
232 | } | |
b3530820 JG |
233 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
234 | ret = close(kconsumer_data.channel_monitor_pipe); | |
235 | if (ret < 0) { | |
236 | PERROR("kernel consumer channel monitor pipe close"); | |
237 | } | |
238 | } | |
239 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
240 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
241 | if (ret < 0) { | |
242 | PERROR("UST consumerd32 channel monitor pipe close"); | |
243 | } | |
244 | } | |
245 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
246 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
247 | if (ret < 0) { | |
248 | PERROR("UST consumerd64 channel monitor pipe close"); | |
249 | } | |
250 | } | |
e975f9f8 DG |
251 | } |
252 | ||
4e4714cb JR |
253 | /* |
254 | * Wait on consumer process termination. | |
255 | * | |
256 | * Need to be called with the consumer data lock held or from a context | |
257 | * ensuring no concurrent access to data (e.g: cleanup). | |
258 | */ | |
259 | static void wait_consumer(struct consumer_data *consumer_data) | |
260 | { | |
261 | pid_t ret; | |
262 | int status; | |
263 | ||
264 | if (consumer_data->pid <= 0) { | |
265 | return; | |
266 | } | |
267 | ||
268 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
269 | consumer_data->pid); | |
270 | ret = waitpid(consumer_data->pid, &status, 0); | |
271 | if (ret == -1) { | |
272 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 273 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
274 | ERR("consumerd termination with error: %d", |
275 | WEXITSTATUS(ret)); | |
276 | } | |
277 | consumer_data->pid = 0; | |
278 | } | |
279 | ||
fac6795d | 280 | /* |
4a15001e | 281 | * Cleanup the session daemon's data structures. |
fac6795d | 282 | */ |
4a15001e | 283 | static void sessiond_cleanup(void) |
fac6795d | 284 | { |
ef599319 | 285 | int ret; |
48a86f68 | 286 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 287 | |
4a15001e | 288 | DBG("Cleanup sessiond"); |
e07ae692 | 289 | |
4e449f3f MD |
290 | /* |
291 | * Close the thread quit pipe. It has already done its job, | |
292 | * since we are now called. | |
293 | */ | |
51bb4dbb | 294 | sessiond_close_quit_pipe(); |
53c51aaa JG |
295 | utils_close_pipe(apps_cmd_pipe); |
296 | utils_close_pipe(apps_cmd_notify_pipe); | |
2f77fc4b | 297 | |
c9a2957d JG |
298 | ret = remove(config.pid_file_path.value); |
299 | if (ret < 0) { | |
300 | PERROR("remove pidfile %s", config.pid_file_path.value); | |
35f90c40 DG |
301 | } |
302 | ||
e6142f2e JG |
303 | DBG("Removing sessiond and consumerd content of directory %s", |
304 | config.rundir.value); | |
8c6c56c2 MD |
305 | |
306 | /* sessiond */ | |
e6142f2e JG |
307 | DBG("Removing %s", config.pid_file_path.value); |
308 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 309 | |
e6142f2e JG |
310 | DBG("Removing %s", config.agent_port_file_path.value); |
311 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 312 | |
8c6c56c2 | 313 | /* kconsumerd */ |
e6142f2e JG |
314 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
315 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
316 | ||
317 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
318 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
319 | |
320 | /* ust consumerd 32 */ | |
e6142f2e JG |
321 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
322 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
323 | ||
324 | DBG("Removing directory %s", config.consumerd32_path.value); | |
325 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
326 | |
327 | /* ust consumerd 64 */ | |
e6142f2e JG |
328 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
329 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
330 | ||
331 | DBG("Removing directory %s", config.consumerd64_path.value); | |
332 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 333 | |
6af972a2 | 334 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 335 | |
4e4714cb JR |
336 | wait_consumer(&kconsumer_data); |
337 | wait_consumer(&ustconsumer64_data); | |
338 | wait_consumer(&ustconsumer32_data); | |
339 | ||
6a4e4039 JG |
340 | DBG("Cleaning up all agent apps"); |
341 | agent_app_ht_clean(); | |
342 | ||
099e26bd | 343 | DBG("Closing all UST sockets"); |
56fff090 | 344 | ust_app_clean_list(); |
7972aab2 | 345 | buffer_reg_destroy_registries(); |
099e26bd | 346 | |
e6142f2e | 347 | if (is_root && !config.no_kernel) { |
4fba7219 | 348 | DBG2("Closing kernel fd"); |
a4b35e07 | 349 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
350 | ret = close(kernel_tracer_fd); |
351 | if (ret) { | |
352 | PERROR("close"); | |
353 | } | |
a4b35e07 | 354 | } |
2f50c8a3 | 355 | DBG("Unloading kernel modules"); |
096102bd | 356 | modprobe_remove_lttng_all(); |
834978fd | 357 | free(syscall_table); |
2f50c8a3 | 358 | } |
2f77fc4b | 359 | |
e975f9f8 DG |
360 | close_consumer_sockets(); |
361 | ||
ef367a93 JG |
362 | if (load_info) { |
363 | load_session_destroy_data(load_info); | |
364 | free(load_info); | |
365 | } | |
366 | ||
c9cb3e7d JG |
367 | /* |
368 | * We do NOT rmdir rundir because there are other processes | |
369 | * using it, for instance lttng-relayd, which can start in | |
370 | * parallel with this teardown. | |
371 | */ | |
4a15001e MD |
372 | } |
373 | ||
374 | /* | |
375 | * Cleanup the daemon's option data structures. | |
376 | */ | |
377 | static void sessiond_cleanup_options(void) | |
378 | { | |
379 | DBG("Cleaning up options"); | |
380 | ||
e6142f2e | 381 | sessiond_config_fini(&config); |
c9cb3e7d | 382 | |
7567352f | 383 | run_as_destroy_worker(); |
fac6795d DG |
384 | } |
385 | ||
7a485870 | 386 | /* |
5eb91c98 | 387 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 388 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 389 | */ |
5eb91c98 | 390 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 391 | { |
5eb91c98 | 392 | int ret; |
7a485870 | 393 | struct ltt_kernel_channel *channel; |
48a86f68 JG |
394 | struct ltt_session *session; |
395 | const struct ltt_session_list *session_list = session_get_list(); | |
7a485870 | 396 | |
5eb91c98 | 397 | DBG("Updating kernel poll set"); |
7a485870 | 398 | |
54d01ffb | 399 | session_lock_list(); |
48a86f68 JG |
400 | cds_list_for_each_entry(session, &session_list->head, list) { |
401 | if (!session_get(session)) { | |
402 | continue; | |
403 | } | |
54d01ffb | 404 | session_lock(session); |
7a485870 | 405 | if (session->kernel_session == NULL) { |
54d01ffb | 406 | session_unlock(session); |
48a86f68 | 407 | session_put(session); |
7a485870 DG |
408 | continue; |
409 | } | |
7a485870 | 410 | |
54d01ffb DG |
411 | cds_list_for_each_entry(channel, |
412 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
413 | /* Add channel fd to the kernel poll set */ |
414 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
415 | if (ret < 0) { | |
54d01ffb | 416 | session_unlock(session); |
48a86f68 | 417 | session_put(session); |
5eb91c98 DG |
418 | goto error; |
419 | } | |
420 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 421 | } |
54d01ffb | 422 | session_unlock(session); |
7a485870 | 423 | } |
54d01ffb | 424 | session_unlock_list(); |
7a485870 | 425 | |
5eb91c98 | 426 | return 0; |
7a485870 DG |
427 | |
428 | error: | |
54d01ffb | 429 | session_unlock_list(); |
7a485870 DG |
430 | return -1; |
431 | } | |
432 | ||
433 | /* | |
54d01ffb | 434 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 435 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 436 | * |
d063d709 | 437 | * Useful for CPU hotplug feature. |
7a485870 | 438 | */ |
7f032058 | 439 | static int update_kernel_stream(int fd) |
7a485870 DG |
440 | { |
441 | int ret = 0; | |
442 | struct ltt_session *session; | |
173af62f | 443 | struct ltt_kernel_session *ksess; |
7a485870 | 444 | struct ltt_kernel_channel *channel; |
48a86f68 | 445 | const struct ltt_session_list *session_list = session_get_list(); |
7a485870 DG |
446 | |
447 | DBG("Updating kernel streams for channel fd %d", fd); | |
448 | ||
54d01ffb | 449 | session_lock_list(); |
48a86f68 JG |
450 | cds_list_for_each_entry(session, &session_list->head, list) { |
451 | if (!session_get(session)) { | |
452 | continue; | |
453 | } | |
54d01ffb | 454 | session_lock(session); |
7a485870 | 455 | if (session->kernel_session == NULL) { |
54d01ffb | 456 | session_unlock(session); |
48a86f68 | 457 | session_put(session); |
7a485870 DG |
458 | continue; |
459 | } | |
173af62f | 460 | ksess = session->kernel_session; |
d9800920 | 461 | |
4a15001e MD |
462 | cds_list_for_each_entry(channel, |
463 | &ksess->channel_list.head, list) { | |
464 | struct lttng_ht_iter iter; | |
465 | struct consumer_socket *socket; | |
d9800920 | 466 | |
4a15001e MD |
467 | if (channel->fd != fd) { |
468 | continue; | |
469 | } | |
470 | DBG("Channel found, updating kernel streams"); | |
471 | ret = kernel_open_channel_stream(channel); | |
472 | if (ret < 0) { | |
473 | goto error; | |
474 | } | |
475 | /* Update the stream global counter */ | |
476 | ksess->stream_count_global += ret; | |
477 | ||
478 | /* | |
479 | * Have we already sent fds to the consumer? If yes, it | |
480 | * means that tracing is started so it is safe to send | |
481 | * our updated stream fds. | |
482 | */ | |
483 | if (ksess->consumer_fds_sent != 1 | |
484 | || ksess->consumer == NULL) { | |
485 | ret = -1; | |
486 | goto error; | |
487 | } | |
488 | ||
489 | rcu_read_lock(); | |
490 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
491 | &iter.iter, socket, node.node) { | |
492 | pthread_mutex_lock(socket->lock); | |
1fc1b7c8 | 493 | ret = kernel_consumer_send_channel_streams(socket, |
4a15001e MD |
494 | channel, ksess, |
495 | session->output_traces ? 1 : 0); | |
496 | pthread_mutex_unlock(socket->lock); | |
497 | if (ret < 0) { | |
e7fe706f | 498 | rcu_read_unlock(); |
4a15001e | 499 | goto error; |
7a485870 | 500 | } |
7a485870 | 501 | } |
4a15001e | 502 | rcu_read_unlock(); |
7a485870 | 503 | } |
54d01ffb | 504 | session_unlock(session); |
48a86f68 | 505 | session_put(session); |
7a485870 | 506 | } |
54d01ffb | 507 | session_unlock_list(); |
b3c750d2 | 508 | return ret; |
7a485870 | 509 | |
b3c750d2 | 510 | error: |
54d01ffb | 511 | session_unlock(session); |
48a86f68 | 512 | session_put(session); |
54d01ffb | 513 | session_unlock_list(); |
7a485870 DG |
514 | return ret; |
515 | } | |
516 | ||
517 | /* | |
d063d709 | 518 | * This thread manage event coming from the kernel. |
7a485870 | 519 | * |
d063d709 DG |
520 | * Features supported in this thread: |
521 | * -) CPU Hotplug | |
7a485870 DG |
522 | */ |
523 | static void *thread_manage_kernel(void *data) | |
524 | { | |
139ac872 | 525 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 526 | uint32_t revents, nb_fd; |
7a485870 | 527 | char tmp; |
5eb91c98 | 528 | struct lttng_poll_event events; |
7a485870 | 529 | |
6993eeb3 | 530 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 531 | |
6c71277b | 532 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 533 | |
d5d63bf1 DG |
534 | /* |
535 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 536 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 537 | */ |
6d737ce4 | 538 | lttng_poll_init(&events); |
d5d63bf1 | 539 | |
e547b070 | 540 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
541 | goto error_testpoint; |
542 | } | |
8ac94142 | 543 | |
840cb59c | 544 | health_code_update(); |
44a5e5eb | 545 | |
e547b070 | 546 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 547 | goto error_testpoint; |
6993eeb3 CB |
548 | } |
549 | ||
7a485870 | 550 | while (1) { |
840cb59c | 551 | health_code_update(); |
44a5e5eb | 552 | |
7a485870 | 553 | if (update_poll_flag == 1) { |
d21b0d71 DG |
554 | /* Clean events object. We are about to populate it again. */ |
555 | lttng_poll_clean(&events); | |
556 | ||
d0b96690 | 557 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
558 | if (ret < 0) { |
559 | goto error_poll_create; | |
560 | } | |
561 | ||
562 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
563 | if (ret < 0) { | |
564 | goto error; | |
565 | } | |
5f822d0a | 566 | |
d21b0d71 | 567 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
568 | ret = update_kernel_poll(&events); |
569 | if (ret < 0) { | |
7a485870 DG |
570 | goto error; |
571 | } | |
572 | update_poll_flag = 0; | |
573 | } | |
574 | ||
7fa2082e | 575 | DBG("Thread kernel polling"); |
7a485870 DG |
576 | |
577 | /* Poll infinite value of time */ | |
88f2b785 | 578 | restart: |
a78af745 | 579 | health_poll_entry(); |
5eb91c98 | 580 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
581 | DBG("Thread kernel return from poll on %d fds", |
582 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 583 | health_poll_exit(); |
7a485870 | 584 | if (ret < 0) { |
88f2b785 MD |
585 | /* |
586 | * Restart interrupted system call. | |
587 | */ | |
588 | if (errno == EINTR) { | |
589 | goto restart; | |
590 | } | |
7a485870 DG |
591 | goto error; |
592 | } else if (ret == 0) { | |
593 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
594 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
595 | "This should not have happened! Continuing..."); | |
7a485870 DG |
596 | continue; |
597 | } | |
598 | ||
0d9c5d77 DG |
599 | nb_fd = ret; |
600 | ||
5eb91c98 DG |
601 | for (i = 0; i < nb_fd; i++) { |
602 | /* Fetch once the poll data */ | |
603 | revents = LTTNG_POLL_GETEV(&events, i); | |
604 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 605 | |
840cb59c | 606 | health_code_update(); |
44a5e5eb | 607 | |
fd20dac9 MD |
608 | if (!revents) { |
609 | /* No activity for this FD (poll implementation). */ | |
610 | continue; | |
611 | } | |
612 | ||
5eb91c98 | 613 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 614 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 615 | if (ret) { |
139ac872 MD |
616 | err = 0; |
617 | goto exit; | |
5eb91c98 | 618 | } |
7a485870 | 619 | |
5eb91c98 | 620 | /* Check for data on kernel pipe */ |
03e43155 MD |
621 | if (revents & LPOLLIN) { |
622 | if (pollfd == kernel_poll_pipe[0]) { | |
623 | (void) lttng_read(kernel_poll_pipe[0], | |
624 | &tmp, 1); | |
625 | /* | |
626 | * Ret value is useless here, if this pipe gets any actions an | |
627 | * update is required anyway. | |
628 | */ | |
629 | update_poll_flag = 1; | |
630 | continue; | |
631 | } else { | |
632 | /* | |
633 | * New CPU detected by the kernel. Adding kernel stream to | |
634 | * kernel session and updating the kernel consumer | |
635 | */ | |
7f032058 | 636 | ret = update_kernel_stream(pollfd); |
5eb91c98 DG |
637 | if (ret < 0) { |
638 | continue; | |
639 | } | |
640 | break; | |
7a485870 | 641 | } |
03e43155 MD |
642 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
643 | update_poll_flag = 1; | |
644 | continue; | |
645 | } else { | |
646 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
647 | goto error; | |
7a485870 DG |
648 | } |
649 | } | |
650 | } | |
651 | ||
139ac872 | 652 | exit: |
7a485870 | 653 | error: |
5eb91c98 | 654 | lttng_poll_clean(&events); |
76d7553f | 655 | error_poll_create: |
6993eeb3 | 656 | error_testpoint: |
6620da75 DG |
657 | utils_close_pipe(kernel_poll_pipe); |
658 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 659 | if (err) { |
840cb59c | 660 | health_error(); |
139ac872 | 661 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
662 | WARN("Kernel thread died unexpectedly. " |
663 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 664 | } |
8782cc74 | 665 | health_unregister(health_sessiond); |
76d7553f | 666 | DBG("Kernel thread dying"); |
7a485870 DG |
667 | return NULL; |
668 | } | |
669 | ||
a23ec3a7 DG |
670 | /* |
671 | * Signal pthread condition of the consumer data that the thread. | |
672 | */ | |
673 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
674 | { | |
675 | pthread_mutex_lock(&data->cond_mutex); | |
676 | ||
677 | /* | |
678 | * The state is set before signaling. It can be any value, it's the waiter | |
679 | * job to correctly interpret this condition variable associated to the | |
680 | * consumer pthread_cond. | |
681 | * | |
682 | * A value of 0 means that the corresponding thread of the consumer data | |
683 | * was not started. 1 indicates that the thread has started and is ready | |
684 | * for action. A negative value means that there was an error during the | |
685 | * thread bootstrap. | |
686 | */ | |
687 | data->consumer_thread_is_ready = state; | |
688 | (void) pthread_cond_signal(&data->cond); | |
689 | ||
690 | pthread_mutex_unlock(&data->cond_mutex); | |
691 | } | |
692 | ||
1d4b027a | 693 | /* |
3bd1e081 | 694 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 695 | */ |
050e613c | 696 | void *thread_manage_consumer(void *data) |
1d4b027a | 697 | { |
42fc1d0b | 698 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 699 | uint32_t revents, nb_fd; |
1d4b027a | 700 | enum lttcomm_return_code code; |
5eb91c98 | 701 | struct lttng_poll_event events; |
3bd1e081 | 702 | struct consumer_data *consumer_data = data; |
b3530820 | 703 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 704 | |
3bd1e081 | 705 | DBG("[thread] Manage consumer started"); |
1d4b027a | 706 | |
34c1e15a MD |
707 | rcu_register_thread(); |
708 | rcu_thread_online(); | |
709 | ||
6c71277b | 710 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 711 | |
855060f8 | 712 | health_code_update(); |
9449cc75 | 713 | |
5eb91c98 | 714 | /* |
331744e3 JD |
715 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
716 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 717 | */ |
331744e3 | 718 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 719 | if (ret < 0) { |
76d7553f | 720 | goto error_poll; |
5eb91c98 | 721 | } |
273ea72c | 722 | |
edb8b045 DG |
723 | /* |
724 | * The error socket here is already in a listening state which was done | |
725 | * just before spawning this thread to avoid a race between the consumer | |
726 | * daemon exec trying to connect and the listen() call. | |
727 | */ | |
3bd1e081 | 728 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
729 | if (ret < 0) { |
730 | goto error; | |
731 | } | |
732 | ||
840cb59c | 733 | health_code_update(); |
44a5e5eb | 734 | |
331744e3 | 735 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 736 | restart: |
a78af745 | 737 | health_poll_entry(); |
8ac94142 | 738 | |
e547b070 | 739 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
740 | goto error; |
741 | } | |
8ac94142 | 742 | |
5eb91c98 | 743 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 744 | health_poll_exit(); |
273ea72c | 745 | if (ret < 0) { |
88f2b785 MD |
746 | /* |
747 | * Restart interrupted system call. | |
748 | */ | |
749 | if (errno == EINTR) { | |
750 | goto restart; | |
751 | } | |
273ea72c DG |
752 | goto error; |
753 | } | |
754 | ||
0d9c5d77 DG |
755 | nb_fd = ret; |
756 | ||
5eb91c98 DG |
757 | for (i = 0; i < nb_fd; i++) { |
758 | /* Fetch once the poll data */ | |
759 | revents = LTTNG_POLL_GETEV(&events, i); | |
760 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
761 | ||
840cb59c | 762 | health_code_update(); |
44a5e5eb | 763 | |
fd20dac9 MD |
764 | if (!revents) { |
765 | /* No activity for this FD (poll implementation). */ | |
766 | continue; | |
767 | } | |
768 | ||
5eb91c98 | 769 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 770 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 771 | if (ret) { |
139ac872 MD |
772 | err = 0; |
773 | goto exit; | |
5eb91c98 DG |
774 | } |
775 | ||
776 | /* Event on the registration socket */ | |
3bd1e081 | 777 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
778 | if (revents & LPOLLIN) { |
779 | continue; | |
780 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 781 | ERR("consumer err socket poll error"); |
5eb91c98 | 782 | goto error; |
03e43155 MD |
783 | } else { |
784 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
785 | goto error; | |
5eb91c98 DG |
786 | } |
787 | } | |
273ea72c DG |
788 | } |
789 | ||
3bd1e081 | 790 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
791 | if (sock < 0) { |
792 | goto error; | |
793 | } | |
794 | ||
b662582b DG |
795 | /* |
796 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
797 | * show must go on. | |
798 | */ | |
799 | (void) utils_set_fd_cloexec(sock); | |
800 | ||
840cb59c | 801 | health_code_update(); |
44a5e5eb | 802 | |
3bd1e081 | 803 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 804 | |
712ea556 | 805 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
806 | ret = lttcomm_recv_unix_sock(sock, &code, |
807 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
808 | if (ret <= 0) { |
809 | goto error; | |
810 | } | |
811 | ||
840cb59c | 812 | health_code_update(); |
b3530820 | 813 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 814 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
815 | lttcomm_get_readable_code(-code)); |
816 | goto error; | |
817 | } | |
818 | ||
b3530820 JG |
819 | /* Connect both command and metadata sockets. */ |
820 | consumer_data->cmd_sock = | |
821 | lttcomm_connect_unix_sock( | |
822 | consumer_data->cmd_unix_sock_path); | |
823 | consumer_data->metadata_fd = | |
824 | lttcomm_connect_unix_sock( | |
825 | consumer_data->cmd_unix_sock_path); | |
826 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
827 | PERROR("consumer connect cmd socket"); | |
828 | /* On error, signal condition and quit. */ | |
829 | signal_consumer_condition(consumer_data, -1); | |
830 | goto error; | |
831 | } | |
832 | ||
833 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
834 | ||
835 | /* Create metadata socket lock. */ | |
836 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
837 | if (consumer_data->metadata_sock.lock == NULL) { | |
838 | PERROR("zmalloc pthread mutex"); | |
839 | goto error; | |
840 | } | |
841 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
842 | ||
843 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
844 | DBG("Consumer metadata socket ready (fd: %d)", | |
845 | consumer_data->metadata_fd); | |
846 | ||
847 | /* | |
848 | * Remove the consumerd error sock since we've established a connection. | |
849 | */ | |
3bd1e081 | 850 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 851 | if (ret < 0) { |
72079cae DG |
852 | goto error; |
853 | } | |
854 | ||
331744e3 | 855 | /* Add new accepted error socket. */ |
5eb91c98 DG |
856 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
857 | if (ret < 0) { | |
72079cae | 858 | goto error; |
5eb91c98 DG |
859 | } |
860 | ||
331744e3 | 861 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 862 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
863 | LPOLLIN | LPOLLRDHUP); |
864 | if (ret < 0) { | |
865 | goto error; | |
866 | } | |
867 | ||
840cb59c | 868 | health_code_update(); |
44a5e5eb | 869 | |
b3530820 | 870 | /* |
62c43103 | 871 | * Transfer the write-end of the channel monitoring and rotate pipe |
82528808 | 872 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE command. |
b3530820 JG |
873 | */ |
874 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
875 | if (!cmd_socket_wrapper) { | |
876 | goto error; | |
877 | } | |
3e4dc117 | 878 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
879 | |
880 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
881 | consumer_data->channel_monitor_pipe); | |
882 | if (ret) { | |
883 | goto error; | |
884 | } | |
62c43103 | 885 | |
b3530820 JG |
886 | /* Discard the socket wrapper as it is no longer needed. */ |
887 | consumer_destroy_socket(cmd_socket_wrapper); | |
888 | cmd_socket_wrapper = NULL; | |
889 | ||
890 | /* The thread is completely initialized, signal that it is ready. */ | |
891 | signal_consumer_condition(consumer_data, 1); | |
892 | ||
331744e3 | 893 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 894 | restart_poll: |
331744e3 | 895 | while (1) { |
42fc1d0b DG |
896 | health_code_update(); |
897 | ||
898 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
899 | if (should_quit) { | |
900 | /* Not a health error. */ | |
901 | err = 0; | |
902 | goto exit; | |
903 | } | |
904 | ||
331744e3 JD |
905 | health_poll_entry(); |
906 | ret = lttng_poll_wait(&events, -1); | |
907 | health_poll_exit(); | |
908 | if (ret < 0) { | |
909 | /* | |
910 | * Restart interrupted system call. | |
911 | */ | |
912 | if (errno == EINTR) { | |
913 | goto restart_poll; | |
914 | } | |
915 | goto error; | |
88f2b785 | 916 | } |
72079cae | 917 | |
331744e3 | 918 | nb_fd = ret; |
0d9c5d77 | 919 | |
331744e3 JD |
920 | for (i = 0; i < nb_fd; i++) { |
921 | /* Fetch once the poll data */ | |
922 | revents = LTTNG_POLL_GETEV(&events, i); | |
923 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 924 | |
331744e3 | 925 | health_code_update(); |
44a5e5eb | 926 | |
fd20dac9 MD |
927 | if (!revents) { |
928 | /* No activity for this FD (poll implementation). */ | |
929 | continue; | |
930 | } | |
931 | ||
42fc1d0b DG |
932 | /* |
933 | * Thread quit pipe has been triggered, flag that we should stop | |
934 | * but continue the current loop to handle potential data from | |
935 | * consumer. | |
936 | */ | |
937 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 938 | |
331744e3 JD |
939 | if (pollfd == sock) { |
940 | /* Event on the consumerd socket */ | |
03e43155 MD |
941 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
942 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
943 | ERR("consumer err socket second poll error"); |
944 | goto error; | |
945 | } | |
946 | health_code_update(); | |
947 | /* Wait for any kconsumerd error */ | |
948 | ret = lttcomm_recv_unix_sock(sock, &code, | |
949 | sizeof(enum lttcomm_return_code)); | |
950 | if (ret <= 0) { | |
951 | ERR("consumer closed the command socket"); | |
952 | goto error; | |
953 | } | |
954 | ||
955 | ERR("consumer return code : %s", | |
956 | lttcomm_get_readable_code(-code)); | |
957 | ||
958 | goto exit; | |
4ce514c4 | 959 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
960 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
961 | && !(revents & LPOLLIN)) { | |
962 | ERR("consumer err metadata socket second poll error"); | |
963 | goto error; | |
964 | } | |
331744e3 JD |
965 | /* UST metadata requests */ |
966 | ret = ust_consumer_metadata_request( | |
967 | &consumer_data->metadata_sock); | |
968 | if (ret < 0) { | |
969 | ERR("Handling metadata request"); | |
970 | goto error; | |
971 | } | |
5eb91c98 | 972 | } |
42fc1d0b | 973 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 974 | } |
331744e3 | 975 | health_code_update(); |
5eb91c98 DG |
976 | } |
977 | ||
139ac872 | 978 | exit: |
1d4b027a | 979 | error: |
fdadac08 DG |
980 | /* |
981 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
982 | * thread might be using them so get exclusive access which will abort all |
983 | * other consumer command by other threads. | |
fdadac08 DG |
984 | */ |
985 | pthread_mutex_lock(&consumer_data->lock); | |
986 | ||
5c827ce0 DG |
987 | /* Immediately set the consumerd state to stopped */ |
988 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
989 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
990 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
991 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
992 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
993 | } else { | |
994 | /* Code flow error... */ | |
995 | assert(0); | |
996 | } | |
997 | ||
76d7553f MD |
998 | if (consumer_data->err_sock >= 0) { |
999 | ret = close(consumer_data->err_sock); | |
1000 | if (ret) { | |
1001 | PERROR("close"); | |
1002 | } | |
a76cbd9f | 1003 | consumer_data->err_sock = -1; |
76d7553f MD |
1004 | } |
1005 | if (consumer_data->cmd_sock >= 0) { | |
1006 | ret = close(consumer_data->cmd_sock); | |
1007 | if (ret) { | |
1008 | PERROR("close"); | |
1009 | } | |
a76cbd9f | 1010 | consumer_data->cmd_sock = -1; |
76d7553f | 1011 | } |
96544455 SS |
1012 | if (consumer_data->metadata_sock.fd_ptr && |
1013 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1014 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1015 | if (ret) { |
1016 | PERROR("close"); | |
1017 | } | |
1018 | } | |
76d7553f MD |
1019 | if (sock >= 0) { |
1020 | ret = close(sock); | |
1021 | if (ret) { | |
1022 | PERROR("close"); | |
1023 | } | |
1024 | } | |
273ea72c | 1025 | |
3bd1e081 MD |
1026 | unlink(consumer_data->err_unix_sock_path); |
1027 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1028 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1029 | |
fdadac08 | 1030 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1031 | if (consumer_data->metadata_sock.lock) { |
1032 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1033 | free(consumer_data->metadata_sock.lock); | |
1034 | } | |
5eb91c98 | 1035 | lttng_poll_clean(&events); |
b3530820 JG |
1036 | |
1037 | if (cmd_socket_wrapper) { | |
1038 | consumer_destroy_socket(cmd_socket_wrapper); | |
1039 | } | |
76d7553f | 1040 | error_poll: |
139ac872 | 1041 | if (err) { |
840cb59c | 1042 | health_error(); |
139ac872 MD |
1043 | ERR("Health error occurred in %s", __func__); |
1044 | } | |
8782cc74 | 1045 | health_unregister(health_sessiond); |
76d7553f | 1046 | DBG("consumer thread cleanup completed"); |
0177d773 | 1047 | |
34c1e15a MD |
1048 | rcu_thread_offline(); |
1049 | rcu_unregister_thread(); | |
1050 | ||
5eb91c98 | 1051 | return NULL; |
099e26bd DG |
1052 | } |
1053 | ||
b73401da | 1054 | /* |
096102bd | 1055 | * Setup necessary data for kernel tracer action. |
b73401da | 1056 | */ |
096102bd | 1057 | static int init_kernel_tracer(void) |
b73401da DG |
1058 | { |
1059 | int ret; | |
b73401da | 1060 | |
096102bd DG |
1061 | /* Modprobe lttng kernel modules */ |
1062 | ret = modprobe_lttng_control(); | |
b73401da | 1063 | if (ret < 0) { |
b73401da DG |
1064 | goto error; |
1065 | } | |
1066 | ||
096102bd DG |
1067 | /* Open debugfs lttng */ |
1068 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1069 | if (kernel_tracer_fd < 0) { | |
1070 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 1071 | goto error_open; |
54d01ffb DG |
1072 | } |
1073 | ||
2f77fc4b | 1074 | /* Validate kernel version */ |
88076e89 JD |
1075 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
1076 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
1077 | if (ret < 0) { |
1078 | goto error_version; | |
b551a063 | 1079 | } |
54d01ffb | 1080 | |
2f77fc4b DG |
1081 | ret = modprobe_lttng_data(); |
1082 | if (ret < 0) { | |
1083 | goto error_modules; | |
54d01ffb DG |
1084 | } |
1085 | ||
6e21424e JR |
1086 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
1087 | kernel_tracer_fd); | |
1088 | if (ret < 0) { | |
1089 | goto error_modules; | |
1090 | } | |
1091 | ||
1092 | if (ret < 1) { | |
1093 | WARN("Kernel tracer does not support buffer monitoring. " | |
1094 | "The monitoring timer of channels in the kernel domain " | |
1095 | "will be set to 0 (disabled)."); | |
1096 | } | |
1097 | ||
2f77fc4b DG |
1098 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
1099 | return 0; | |
1100 | ||
1101 | error_version: | |
1102 | modprobe_remove_lttng_control(); | |
1103 | ret = close(kernel_tracer_fd); | |
1104 | if (ret) { | |
1105 | PERROR("close"); | |
b551a063 | 1106 | } |
2f77fc4b | 1107 | kernel_tracer_fd = -1; |
f73fabfd | 1108 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 1109 | |
2f77fc4b DG |
1110 | error_modules: |
1111 | ret = close(kernel_tracer_fd); | |
1112 | if (ret) { | |
1113 | PERROR("close"); | |
b551a063 | 1114 | } |
54d01ffb | 1115 | |
2f77fc4b DG |
1116 | error_open: |
1117 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
1118 | |
1119 | error: | |
2f77fc4b DG |
1120 | WARN("No kernel tracer available"); |
1121 | kernel_tracer_fd = -1; | |
1122 | if (!is_root) { | |
f73fabfd | 1123 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 1124 | } else { |
f73fabfd | 1125 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 1126 | } |
54d01ffb DG |
1127 | } |
1128 | ||
050e613c | 1129 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 1130 | { |
050e613c | 1131 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
1132 | } |
1133 | ||
00e2e675 | 1134 | /* |
050e613c JG |
1135 | * Take an option from the getopt output and set it in the right variable to be |
1136 | * used later. | |
36b588ed | 1137 | * |
050e613c | 1138 | * Return 0 on success else a negative value. |
00e2e675 | 1139 | */ |
050e613c | 1140 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 1141 | { |
050e613c | 1142 | int ret = 0; |
fac6795d | 1143 | |
c0232ea5 | 1144 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
1145 | if (!arg || *arg == '\0') { |
1146 | ret = -EINVAL; | |
1147 | goto end; | |
1148 | } | |
e8fa9fb0 MD |
1149 | if (lttng_is_setuid_setgid()) { |
1150 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1151 | "-c, --client-sock"); | |
1152 | } else { | |
e6142f2e JG |
1153 | config_string_set(&config.client_unix_sock_path, |
1154 | strdup(arg)); | |
1155 | if (!config.client_unix_sock_path.value) { | |
1156 | ret = -ENOMEM; | |
1157 | PERROR("strdup"); | |
1158 | } | |
e8fa9fb0 | 1159 | } |
c0232ea5 | 1160 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
1161 | if (!arg || *arg == '\0') { |
1162 | ret = -EINVAL; | |
1163 | goto end; | |
1164 | } | |
e8fa9fb0 MD |
1165 | if (lttng_is_setuid_setgid()) { |
1166 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1167 | "-a, --apps-sock"); | |
1168 | } else { | |
e6142f2e JG |
1169 | config_string_set(&config.apps_unix_sock_path, |
1170 | strdup(arg)); | |
1171 | if (!config.apps_unix_sock_path.value) { | |
1172 | ret = -ENOMEM; | |
1173 | PERROR("strdup"); | |
1174 | } | |
e8fa9fb0 | 1175 | } |
c0232ea5 | 1176 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 1177 | config.daemonize = true; |
c0232ea5 | 1178 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 1179 | config.background = true; |
c0232ea5 | 1180 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
1181 | if (!arg || *arg == '\0') { |
1182 | ret = -EINVAL; | |
1183 | goto end; | |
1184 | } | |
e8fa9fb0 MD |
1185 | if (lttng_is_setuid_setgid()) { |
1186 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1187 | "-g, --group"); | |
1188 | } else { | |
e6142f2e JG |
1189 | config_string_set(&config.tracing_group_name, |
1190 | strdup(arg)); | |
1191 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 1192 | ret = -ENOMEM; |
e6142f2e | 1193 | PERROR("strdup"); |
e8fa9fb0 | 1194 | } |
db322c4d | 1195 | } |
c0232ea5 | 1196 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 1197 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 1198 | if (ret) { |
4fc83d94 | 1199 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
1200 | perror("exec"); |
1201 | } | |
1202 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 1203 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
1204 | fprintf(stdout, "%s\n", VERSION); |
1205 | exit(EXIT_SUCCESS); | |
c0232ea5 | 1206 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 1207 | config.sig_parent = true; |
c0232ea5 | 1208 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
1209 | if (!arg || *arg == '\0') { |
1210 | ret = -EINVAL; | |
1211 | goto end; | |
1212 | } | |
e8fa9fb0 MD |
1213 | if (lttng_is_setuid_setgid()) { |
1214 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1215 | "--kconsumerd-err-sock"); | |
1216 | } else { | |
e6142f2e JG |
1217 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
1218 | strdup(arg)); | |
1219 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
1220 | ret = -ENOMEM; | |
1221 | PERROR("strdup"); | |
1222 | } | |
e8fa9fb0 | 1223 | } |
c0232ea5 | 1224 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
1225 | if (!arg || *arg == '\0') { |
1226 | ret = -EINVAL; | |
1227 | goto end; | |
1228 | } | |
e8fa9fb0 MD |
1229 | if (lttng_is_setuid_setgid()) { |
1230 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1231 | "--kconsumerd-cmd-sock"); | |
1232 | } else { | |
e6142f2e JG |
1233 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
1234 | strdup(arg)); | |
1235 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
1236 | ret = -ENOMEM; | |
1237 | PERROR("strdup"); | |
1238 | } | |
e8fa9fb0 | 1239 | } |
c0232ea5 | 1240 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
1241 | if (!arg || *arg == '\0') { |
1242 | ret = -EINVAL; | |
1243 | goto end; | |
1244 | } | |
e8fa9fb0 MD |
1245 | if (lttng_is_setuid_setgid()) { |
1246 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1247 | "--ustconsumerd64-err-sock"); | |
1248 | } else { | |
e6142f2e JG |
1249 | config_string_set(&config.consumerd64_err_unix_sock_path, |
1250 | strdup(arg)); | |
1251 | if (!config.consumerd64_err_unix_sock_path.value) { | |
1252 | ret = -ENOMEM; | |
1253 | PERROR("strdup"); | |
1254 | } | |
e8fa9fb0 | 1255 | } |
c0232ea5 | 1256 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
1257 | if (!arg || *arg == '\0') { |
1258 | ret = -EINVAL; | |
1259 | goto end; | |
1260 | } | |
e8fa9fb0 MD |
1261 | if (lttng_is_setuid_setgid()) { |
1262 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1263 | "--ustconsumerd64-cmd-sock"); | |
1264 | } else { | |
e6142f2e JG |
1265 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
1266 | strdup(arg)); | |
1267 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
1268 | ret = -ENOMEM; | |
1269 | PERROR("strdup"); | |
1270 | } | |
e8fa9fb0 | 1271 | } |
c0232ea5 | 1272 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
1273 | if (!arg || *arg == '\0') { |
1274 | ret = -EINVAL; | |
1275 | goto end; | |
1276 | } | |
e8fa9fb0 MD |
1277 | if (lttng_is_setuid_setgid()) { |
1278 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1279 | "--ustconsumerd32-err-sock"); | |
1280 | } else { | |
e6142f2e JG |
1281 | config_string_set(&config.consumerd32_err_unix_sock_path, |
1282 | strdup(arg)); | |
1283 | if (!config.consumerd32_err_unix_sock_path.value) { | |
1284 | ret = -ENOMEM; | |
1285 | PERROR("strdup"); | |
1286 | } | |
e8fa9fb0 | 1287 | } |
c0232ea5 | 1288 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
1289 | if (!arg || *arg == '\0') { |
1290 | ret = -EINVAL; | |
1291 | goto end; | |
1292 | } | |
e8fa9fb0 MD |
1293 | if (lttng_is_setuid_setgid()) { |
1294 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1295 | "--ustconsumerd32-cmd-sock"); | |
1296 | } else { | |
e6142f2e JG |
1297 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
1298 | strdup(arg)); | |
1299 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
1300 | ret = -ENOMEM; | |
1301 | PERROR("strdup"); | |
1302 | } | |
e8fa9fb0 | 1303 | } |
c0232ea5 | 1304 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 1305 | config.no_kernel = true; |
c0232ea5 | 1306 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 1307 | config.quiet = true; |
c0232ea5 | 1308 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
1309 | /* Verbose level can increase using multiple -v */ |
1310 | if (arg) { | |
13755a18 | 1311 | /* Value obtained from config file */ |
e6142f2e | 1312 | config.verbose = config_parse_value(arg); |
26296c48 | 1313 | } else { |
13755a18 | 1314 | /* -v used on command line */ |
e6142f2e | 1315 | config.verbose++; |
26296c48 | 1316 | } |
13755a18 | 1317 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
1318 | config.verbose = config.verbose < 0 ? 0 : |
1319 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 1320 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 1321 | if (arg) { |
e6142f2e | 1322 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 1323 | } else { |
e6142f2e | 1324 | config.verbose_consumer++; |
26296c48 | 1325 | } |
c0232ea5 | 1326 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
1327 | if (!arg || *arg == '\0') { |
1328 | ret = -EINVAL; | |
1329 | goto end; | |
1330 | } | |
e8fa9fb0 MD |
1331 | if (lttng_is_setuid_setgid()) { |
1332 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1333 | "--consumerd32-path"); | |
1334 | } else { | |
e6142f2e JG |
1335 | config_string_set(&config.consumerd32_bin_path, |
1336 | strdup(arg)); | |
1337 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
1338 | PERROR("strdup"); |
1339 | ret = -ENOMEM; | |
1340 | } | |
db322c4d | 1341 | } |
c0232ea5 | 1342 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
1343 | if (!arg || *arg == '\0') { |
1344 | ret = -EINVAL; | |
1345 | goto end; | |
1346 | } | |
e8fa9fb0 MD |
1347 | if (lttng_is_setuid_setgid()) { |
1348 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1349 | "--consumerd32-libdir"); | |
1350 | } else { | |
e6142f2e JG |
1351 | config_string_set(&config.consumerd32_lib_dir, |
1352 | strdup(arg)); | |
1353 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
1354 | PERROR("strdup"); |
1355 | ret = -ENOMEM; | |
1356 | } | |
db322c4d | 1357 | } |
c0232ea5 | 1358 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
1359 | if (!arg || *arg == '\0') { |
1360 | ret = -EINVAL; | |
1361 | goto end; | |
1362 | } | |
e8fa9fb0 MD |
1363 | if (lttng_is_setuid_setgid()) { |
1364 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1365 | "--consumerd64-path"); | |
1366 | } else { | |
e6142f2e JG |
1367 | config_string_set(&config.consumerd64_bin_path, |
1368 | strdup(arg)); | |
1369 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
1370 | PERROR("strdup"); |
1371 | ret = -ENOMEM; | |
1372 | } | |
db322c4d | 1373 | } |
c0232ea5 | 1374 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
1375 | if (!arg || *arg == '\0') { |
1376 | ret = -EINVAL; | |
1377 | goto end; | |
1378 | } | |
e8fa9fb0 MD |
1379 | if (lttng_is_setuid_setgid()) { |
1380 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1381 | "--consumerd64-libdir"); | |
1382 | } else { | |
e6142f2e JG |
1383 | config_string_set(&config.consumerd64_lib_dir, |
1384 | strdup(arg)); | |
1385 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
1386 | PERROR("strdup"); |
1387 | ret = -ENOMEM; | |
1388 | } | |
db322c4d | 1389 | } |
c0232ea5 | 1390 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
1391 | if (!arg || *arg == '\0') { |
1392 | ret = -EINVAL; | |
1393 | goto end; | |
1394 | } | |
e8fa9fb0 MD |
1395 | if (lttng_is_setuid_setgid()) { |
1396 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1397 | "-p, --pidfile"); | |
1398 | } else { | |
e6142f2e JG |
1399 | config_string_set(&config.pid_file_path, strdup(arg)); |
1400 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
1401 | PERROR("strdup"); |
1402 | ret = -ENOMEM; | |
1403 | } | |
db322c4d | 1404 | } |
c0232ea5 | 1405 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
1406 | if (!arg || *arg == '\0') { |
1407 | ret = -EINVAL; | |
1408 | goto end; | |
1409 | } | |
e8fa9fb0 MD |
1410 | if (lttng_is_setuid_setgid()) { |
1411 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1412 | "--agent-tcp-port"); | |
1413 | } else { | |
1414 | unsigned long v; | |
4d076222 | 1415 | |
e8fa9fb0 MD |
1416 | errno = 0; |
1417 | v = strtoul(arg, NULL, 0); | |
1418 | if (errno != 0 || !isdigit(arg[0])) { | |
1419 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
1420 | return -1; | |
1421 | } | |
1422 | if (v == 0 || v >= 65535) { | |
1423 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
1424 | return -1; | |
1425 | } | |
2288467f JG |
1426 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
1427 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 1428 | } |
c0232ea5 | 1429 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
1430 | if (!arg || *arg == '\0') { |
1431 | ret = -EINVAL; | |
1432 | goto end; | |
1433 | } | |
e8fa9fb0 MD |
1434 | if (lttng_is_setuid_setgid()) { |
1435 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1436 | "-l, --load"); | |
1437 | } else { | |
e6142f2e JG |
1438 | config_string_set(&config.load_session_path, strdup(arg)); |
1439 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
1440 | PERROR("strdup"); |
1441 | ret = -ENOMEM; | |
1442 | } | |
ef367a93 | 1443 | } |
c0232ea5 | 1444 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
1445 | if (!arg || *arg == '\0') { |
1446 | ret = -EINVAL; | |
1447 | goto end; | |
1448 | } | |
e8fa9fb0 MD |
1449 | if (lttng_is_setuid_setgid()) { |
1450 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1451 | "--kmod-probes"); | |
1452 | } else { | |
e6142f2e JG |
1453 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
1454 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
1455 | PERROR("strdup"); |
1456 | ret = -ENOMEM; | |
1457 | } | |
c9d42407 | 1458 | } |
c0232ea5 | 1459 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
1460 | if (!arg || *arg == '\0') { |
1461 | ret = -EINVAL; | |
1462 | goto end; | |
1463 | } | |
e8fa9fb0 MD |
1464 | if (lttng_is_setuid_setgid()) { |
1465 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1466 | "--extra-kmod-probes"); | |
1467 | } else { | |
e6142f2e JG |
1468 | config_string_set(&config.kmod_extra_probes_list, |
1469 | strdup(arg)); | |
1470 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
1471 | PERROR("strdup"); |
1472 | ret = -ENOMEM; | |
1473 | } | |
db322c4d | 1474 | } |
c0232ea5 JG |
1475 | } else if (string_match(optname, "config") || opt == 'f') { |
1476 | /* This is handled in set_options() thus silent skip. */ | |
1477 | goto end; | |
1478 | } else { | |
26296c48 JG |
1479 | /* Unknown option or other error. |
1480 | * Error is printed by getopt, just return */ | |
1481 | ret = -1; | |
1482 | } | |
1483 | ||
f3dd7ce7 | 1484 | end: |
c5d350b2 JG |
1485 | if (ret == -EINVAL) { |
1486 | const char *opt_name = "unknown"; | |
1487 | int i; | |
1488 | ||
1489 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
1490 | i++) { | |
1491 | if (opt == long_options[i].val) { | |
1492 | opt_name = long_options[i].name; | |
1493 | break; | |
1494 | } | |
1495 | } | |
1496 | ||
1497 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
1498 | opt_name); | |
1499 | } | |
f3dd7ce7 | 1500 | |
26296c48 JG |
1501 | return ret; |
1502 | } | |
1503 | ||
1504 | /* | |
1505 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 1506 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
1507 | * return value conventions. |
1508 | */ | |
1509 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
1510 | { | |
1511 | int ret = 0, i; | |
1512 | ||
1513 | if (!entry || !entry->name || !entry->value) { | |
1514 | ret = -EINVAL; | |
1515 | goto end; | |
1516 | } | |
1517 | ||
1518 | /* Check if the option is to be ignored */ | |
1519 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
1520 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
1521 | goto end; | |
1522 | } | |
1523 | } | |
1524 | ||
1525 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
1526 | i++) { | |
1527 | ||
1528 | /* Ignore if not fully matched. */ | |
1529 | if (strcmp(entry->name, long_options[i].name)) { | |
1530 | continue; | |
1531 | } | |
1532 | ||
1533 | /* | |
1534 | * If the option takes no argument on the command line, we have to | |
1535 | * check if the value is "true". We support non-zero numeric values, | |
1536 | * true, on and yes. | |
1537 | */ | |
1538 | if (!long_options[i].has_arg) { | |
1539 | ret = config_parse_value(entry->value); | |
1540 | if (ret <= 0) { | |
1541 | if (ret) { | |
1542 | WARN("Invalid configuration value \"%s\" for option %s", | |
1543 | entry->value, entry->name); | |
1544 | } | |
1545 | /* False, skip boolean config option. */ | |
1546 | goto end; | |
4d076222 | 1547 | } |
26296c48 JG |
1548 | } |
1549 | ||
1550 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
1551 | goto end; | |
1552 | } | |
1553 | ||
1554 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
1555 | ||
1556 | end: | |
1557 | return ret; | |
1558 | } | |
1559 | ||
1560 | /* | |
1561 | * daemon configuration loading and argument parsing | |
1562 | */ | |
1563 | static int set_options(int argc, char **argv) | |
1564 | { | |
1565 | int ret = 0, c = 0, option_index = 0; | |
1566 | int orig_optopt = optopt, orig_optind = optind; | |
1567 | char *optstring; | |
1568 | const char *config_path = NULL; | |
1569 | ||
1570 | optstring = utils_generate_optstring(long_options, | |
1571 | sizeof(long_options) / sizeof(struct option)); | |
1572 | if (!optstring) { | |
1573 | ret = -ENOMEM; | |
1574 | goto end; | |
1575 | } | |
1576 | ||
1577 | /* Check for the --config option */ | |
1578 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
1579 | &option_index)) != -1) { | |
1580 | if (c == '?') { | |
1581 | ret = -EINVAL; | |
1582 | goto end; | |
1583 | } else if (c != 'f') { | |
1584 | /* if not equal to --config option. */ | |
1585 | continue; | |
1586 | } | |
1587 | ||
e8fa9fb0 MD |
1588 | if (lttng_is_setuid_setgid()) { |
1589 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1590 | "-f, --config"); | |
1591 | } else { | |
1592 | config_path = utils_expand_path(optarg); | |
1593 | if (!config_path) { | |
1594 | ERR("Failed to resolve path: %s", optarg); | |
1595 | } | |
26296c48 JG |
1596 | } |
1597 | } | |
1598 | ||
1599 | ret = config_get_section_entries(config_path, config_section_name, | |
1600 | config_entry_handler, NULL); | |
1601 | if (ret) { | |
1602 | if (ret > 0) { | |
1603 | ERR("Invalid configuration option at line %i", ret); | |
1604 | ret = -1; | |
1605 | } | |
1606 | goto end; | |
1607 | } | |
1608 | ||
1609 | /* Reset getopt's global state */ | |
1610 | optopt = orig_optopt; | |
1611 | optind = orig_optind; | |
1612 | while (1) { | |
c0232ea5 JG |
1613 | option_index = -1; |
1614 | /* | |
1615 | * getopt_long() will not set option_index if it encounters a | |
1616 | * short option. | |
1617 | */ | |
1618 | c = getopt_long(argc, argv, optstring, long_options, | |
1619 | &option_index); | |
26296c48 | 1620 | if (c == -1) { |
4d076222 DG |
1621 | break; |
1622 | } | |
26296c48 | 1623 | |
c0232ea5 JG |
1624 | /* |
1625 | * Pass NULL as the long option name if popt left the index | |
1626 | * unset. | |
1627 | */ | |
1628 | ret = set_option(c, optarg, | |
1629 | option_index < 0 ? NULL : | |
1630 | long_options[option_index].name); | |
26296c48 JG |
1631 | if (ret < 0) { |
1632 | break; | |
fac6795d DG |
1633 | } |
1634 | } | |
1635 | ||
26296c48 JG |
1636 | end: |
1637 | free(optstring); | |
1638 | return ret; | |
fac6795d DG |
1639 | } |
1640 | ||
f472090a JG |
1641 | /* |
1642 | * Create lockfile using the rundir and return its fd. | |
1643 | */ | |
1644 | static int create_lockfile(void) | |
1645 | { | |
1646 | return utils_create_lock_file(config.lock_file_path.value); | |
1647 | } | |
1648 | ||
fac6795d | 1649 | /* |
54d01ffb DG |
1650 | * Check if the global socket is available, and if a daemon is answering at the |
1651 | * other side. If yes, error is returned. | |
f472090a JG |
1652 | * |
1653 | * Also attempts to create and hold the lock file. | |
fac6795d | 1654 | */ |
cf3af59e | 1655 | static int check_existing_daemon(void) |
fac6795d | 1656 | { |
f472090a JG |
1657 | int ret = 0; |
1658 | ||
7d8234d9 | 1659 | /* Is there anybody out there ? */ |
099e26bd | 1660 | if (lttng_session_daemon_alive()) { |
f472090a JG |
1661 | ret = -EEXIST; |
1662 | goto end; | |
099e26bd | 1663 | } |
b09c7c76 | 1664 | |
f472090a JG |
1665 | lockfile_fd = create_lockfile(); |
1666 | if (lockfile_fd < 0) { | |
1667 | ret = -EEXIST; | |
1668 | goto end; | |
1669 | } | |
1670 | end: | |
1671 | return ret; | |
1672 | } | |
1673 | ||
1674 | static void sessiond_cleanup_lock_file(void) | |
1675 | { | |
1676 | int ret; | |
1677 | ||
1678 | /* | |
1679 | * Cleanup lock file by deleting it and finaly closing it which will | |
1680 | * release the file system lock. | |
1681 | */ | |
1682 | if (lockfile_fd >= 0) { | |
1683 | ret = remove(config.lock_file_path.value); | |
1684 | if (ret < 0) { | |
1685 | PERROR("remove lock file"); | |
1686 | } | |
1687 | ret = close(lockfile_fd); | |
1688 | if (ret < 0) { | |
1689 | PERROR("close lock file"); | |
1690 | } | |
1691 | } | |
fac6795d DG |
1692 | } |
1693 | ||
fac6795d | 1694 | /* |
d063d709 | 1695 | * Set the tracing group gid onto the client socket. |
5e16da05 | 1696 | * |
d063d709 | 1697 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 1698 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 1699 | */ |
be040666 | 1700 | static int set_permissions(char *rundir) |
fac6795d DG |
1701 | { |
1702 | int ret; | |
996b65c8 | 1703 | gid_t gid; |
fac6795d | 1704 | |
e6142f2e | 1705 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 1706 | |
d6f42150 | 1707 | /* Set lttng run dir */ |
be040666 | 1708 | ret = chown(rundir, 0, gid); |
d6f42150 | 1709 | if (ret < 0) { |
be040666 | 1710 | ERR("Unable to set group on %s", rundir); |
76d7553f | 1711 | PERROR("chown"); |
d6f42150 DG |
1712 | } |
1713 | ||
6c71277b MD |
1714 | /* |
1715 | * Ensure all applications and tracing group can search the run | |
1716 | * dir. Allow everyone to read the directory, since it does not | |
1717 | * buy us anything to hide its content. | |
1718 | */ | |
1719 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
1720 | if (ret < 0) { |
1721 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 1722 | PERROR("chmod"); |
d1613cf5 JN |
1723 | } |
1724 | ||
d6f42150 | 1725 | /* lttng client socket path */ |
e6142f2e | 1726 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 1727 | if (ret < 0) { |
e6142f2e | 1728 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 1729 | PERROR("chown"); |
d6f42150 DG |
1730 | } |
1731 | ||
3bd1e081 | 1732 | /* kconsumer error socket path */ |
6c71277b | 1733 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 1734 | if (ret < 0) { |
3bd1e081 | 1735 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 1736 | PERROR("chown"); |
3bd1e081 MD |
1737 | } |
1738 | ||
7753dea8 | 1739 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 1740 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
1741 | if (ret < 0) { |
1742 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 1743 | PERROR("chown"); |
7753dea8 MD |
1744 | } |
1745 | ||
1746 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 1747 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1748 | if (ret < 0) { |
7753dea8 | 1749 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 1750 | PERROR("chown"); |
fac6795d DG |
1751 | } |
1752 | ||
d6f42150 | 1753 | DBG("All permissions are set"); |
e07ae692 | 1754 | |
fac6795d DG |
1755 | return ret; |
1756 | } | |
1757 | ||
d6f42150 | 1758 | /* |
d063d709 | 1759 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1760 | */ |
e6142f2e | 1761 | static int create_lttng_rundir(void) |
d6f42150 DG |
1762 | { |
1763 | int ret; | |
1764 | ||
e6142f2e | 1765 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 1766 | |
e6142f2e | 1767 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 1768 | if (ret < 0) { |
b1f11e69 | 1769 | if (errno != EEXIST) { |
e6142f2e | 1770 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
1771 | goto error; |
1772 | } else { | |
1773 | ret = 0; | |
1774 | } | |
d6f42150 DG |
1775 | } |
1776 | ||
1777 | error: | |
1778 | return ret; | |
1779 | } | |
1780 | ||
1781 | /* | |
e6142f2e | 1782 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1783 | * session daemon. |
d6f42150 | 1784 | */ |
e6142f2e | 1785 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1786 | { |
1787 | int ret; | |
e6142f2e | 1788 | char *path = NULL; |
d6f42150 | 1789 | |
6c71277b | 1790 | switch (consumer_data->type) { |
7753dea8 | 1791 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 1792 | path = config.kconsumerd_path.value; |
7753dea8 MD |
1793 | break; |
1794 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 1795 | path = config.consumerd64_path.value; |
7753dea8 MD |
1796 | break; |
1797 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 1798 | path = config.consumerd32_path.value; |
7753dea8 MD |
1799 | break; |
1800 | default: | |
1801 | ERR("Consumer type unknown"); | |
1802 | ret = -EINVAL; | |
1803 | goto error; | |
d6f42150 | 1804 | } |
e6142f2e | 1805 | assert(path); |
d6f42150 | 1806 | |
67e40797 DG |
1807 | DBG2("Creating consumer directory: %s", path); |
1808 | ||
6c71277b | 1809 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1810 | if (ret < 0 && errno != EEXIST) { |
1811 | PERROR("mkdir"); | |
1812 | ERR("Failed to create %s", path); | |
1813 | goto error; | |
d6f42150 | 1814 | } |
6c71277b | 1815 | if (is_root) { |
e6142f2e | 1816 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
1817 | if (ret < 0) { |
1818 | ERR("Unable to set group on %s", path); | |
1819 | PERROR("chown"); | |
1820 | goto error; | |
1821 | } | |
1822 | } | |
d6f42150 | 1823 | |
e6142f2e | 1824 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1825 | consumer_data->err_sock = |
1826 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1827 | if (consumer_data->err_sock < 0) { | |
1828 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1829 | ret = -1; |
1830 | goto error; | |
1831 | } | |
1832 | ||
a24f05ab MD |
1833 | /* |
1834 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1835 | * show must go on. | |
1836 | */ | |
1837 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1838 | if (ret < 0) { | |
1839 | PERROR("utils_set_fd_cloexec"); | |
1840 | /* continue anyway */ | |
1841 | } | |
1842 | ||
d6f42150 | 1843 | /* File permission MUST be 660 */ |
3bd1e081 | 1844 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 1845 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1846 | if (ret < 0) { |
3bd1e081 | 1847 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1848 | PERROR("chmod"); |
d6f42150 DG |
1849 | goto error; |
1850 | } | |
1851 | ||
1852 | error: | |
1853 | return ret; | |
1854 | } | |
1855 | ||
fac6795d | 1856 | /* |
d063d709 | 1857 | * Signal handler for the daemon |
cf3af59e | 1858 | * |
54d01ffb DG |
1859 | * Simply stop all worker threads, leaving main() return gracefully after |
1860 | * joining all threads and calling cleanup(). | |
fac6795d DG |
1861 | */ |
1862 | static void sighandler(int sig) | |
1863 | { | |
1864 | switch (sig) { | |
cf3af59e | 1865 | case SIGINT: |
af87c45a | 1866 | DBG("SIGINT caught"); |
cf3af59e MD |
1867 | stop_threads(); |
1868 | break; | |
1869 | case SIGTERM: | |
af87c45a | 1870 | DBG("SIGTERM caught"); |
cf3af59e MD |
1871 | stop_threads(); |
1872 | break; | |
0bb7724a DG |
1873 | case SIGUSR1: |
1874 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1875 | break; | |
cf3af59e MD |
1876 | default: |
1877 | break; | |
fac6795d | 1878 | } |
fac6795d DG |
1879 | } |
1880 | ||
1881 | /* | |
d063d709 | 1882 | * Setup signal handler for : |
1d4b027a | 1883 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1884 | */ |
1d4b027a | 1885 | static int set_signal_handler(void) |
fac6795d | 1886 | { |
1d4b027a DG |
1887 | int ret = 0; |
1888 | struct sigaction sa; | |
1889 | sigset_t sigset; | |
fac6795d | 1890 | |
1d4b027a | 1891 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1892 | PERROR("sigemptyset"); |
1d4b027a DG |
1893 | return ret; |
1894 | } | |
d6f42150 | 1895 | |
1d4b027a DG |
1896 | sa.sa_mask = sigset; |
1897 | sa.sa_flags = 0; | |
0072e5e2 MD |
1898 | |
1899 | sa.sa_handler = sighandler; | |
1d4b027a | 1900 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 1901 | PERROR("sigaction"); |
1d4b027a | 1902 | return ret; |
d6f42150 DG |
1903 | } |
1904 | ||
1d4b027a | 1905 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 1906 | PERROR("sigaction"); |
1d4b027a | 1907 | return ret; |
d6f42150 | 1908 | } |
aaf26714 | 1909 | |
0072e5e2 | 1910 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 1911 | PERROR("sigaction"); |
1d4b027a | 1912 | return ret; |
8c0faa1d DG |
1913 | } |
1914 | ||
0072e5e2 MD |
1915 | sa.sa_handler = SIG_IGN; |
1916 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
1917 | PERROR("sigaction"); |
1918 | return ret; | |
1919 | } | |
1920 | ||
1921 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
1922 | |
1923 | return ret; | |
fac6795d DG |
1924 | } |
1925 | ||
f3ed775e | 1926 | /* |
d063d709 | 1927 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1928 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
1929 | */ |
1930 | static void set_ulimit(void) | |
1931 | { | |
1932 | int ret; | |
1933 | struct rlimit lim; | |
1934 | ||
514bb9f0 | 1935 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1936 | lim.rlim_cur = 65535; |
1937 | lim.rlim_max = 65535; | |
1938 | ||
1939 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1940 | if (ret < 0) { | |
76d7553f | 1941 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1942 | } |
1943 | } | |
1944 | ||
4a15001e | 1945 | static int write_pidfile(void) |
35f90c40 | 1946 | { |
e6142f2e | 1947 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
1948 | } |
1949 | ||
e6142f2e JG |
1950 | static int set_clock_plugin_env(void) |
1951 | { | |
1952 | int ret = 0; | |
1953 | char *env_value = NULL; | |
cd9290dd | 1954 | |
e6142f2e JG |
1955 | if (!config.lttng_ust_clock_plugin.value) { |
1956 | goto end; | |
1957 | } | |
1958 | ||
1959 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
1960 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 1961 | if (ret < 0) { |
e6142f2e JG |
1962 | PERROR("asprintf"); |
1963 | goto end; | |
cd9290dd DG |
1964 | } |
1965 | ||
e6142f2e JG |
1966 | ret = putenv(env_value); |
1967 | if (ret) { | |
1968 | free(env_value); | |
1969 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1970 | goto end; | |
1971 | } | |
cd9290dd | 1972 | |
e6142f2e JG |
1973 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
1974 | config.lttng_ust_clock_plugin.value); | |
1975 | end: | |
4a15001e | 1976 | return ret; |
ef367a93 JG |
1977 | } |
1978 | ||
6af972a2 JG |
1979 | static void destroy_all_sessions_and_wait(void) |
1980 | { | |
1981 | struct ltt_session *session, *tmp; | |
1982 | struct ltt_session_list *session_list; | |
1983 | ||
1984 | session_list = session_get_list(); | |
1985 | DBG("Initiating destruction of all sessions"); | |
1986 | ||
1987 | if (!session_list) { | |
1988 | return; | |
1989 | } | |
1990 | ||
6af972a2 JG |
1991 | session_lock_list(); |
1992 | /* Initiate the destruction of all sessions. */ | |
1993 | cds_list_for_each_entry_safe(session, tmp, | |
1994 | &session_list->head, list) { | |
1995 | if (!session_get(session)) { | |
1996 | continue; | |
1997 | } | |
1998 | ||
1999 | session_lock(session); | |
2000 | if (session->destroyed) { | |
2001 | goto unlock_session; | |
2002 | } | |
2003 | (void) cmd_destroy_session(session, | |
2004 | notification_thread_handle); | |
2005 | unlock_session: | |
2006 | session_unlock(session); | |
2007 | session_put(session); | |
2008 | } | |
2009 | session_unlock_list(); | |
2010 | ||
2011 | /* Wait for the destruction of all sessions to complete. */ | |
2012 | DBG("Waiting for the destruction of all sessions to complete"); | |
2013 | session_list_wait_empty(); | |
2014 | DBG("Destruction of all sessions completed"); | |
2015 | } | |
2016 | ||
fac6795d DG |
2017 | /* |
2018 | * main | |
2019 | */ | |
2020 | int main(int argc, char **argv) | |
2021 | { | |
4a15001e | 2022 | int ret = 0, retval = 0; |
fac6795d | 2023 | void *status; |
e6142f2e | 2024 | const char *env_app_timeout; |
b3530820 JG |
2025 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
2026 | *ust64_channel_monitor_pipe = NULL, | |
2027 | *kernel_channel_monitor_pipe = NULL; | |
548468b9 | 2028 | struct lttng_thread *ht_cleanup_thread = NULL; |
a5ab9e05 | 2029 | struct timer_thread_parameters timer_thread_parameters; |
a430759b JG |
2030 | /* Rotation thread handle. */ |
2031 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
2032 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
2033 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
050e613c | 2034 | struct lttng_thread *client_thread = NULL; |
fac6795d | 2035 | |
335a95b7 MD |
2036 | init_kernel_workarounds(); |
2037 | ||
f6a9efaa DG |
2038 | rcu_register_thread(); |
2039 | ||
4a15001e MD |
2040 | if (set_signal_handler()) { |
2041 | retval = -1; | |
2042 | goto exit_set_signal_handler; | |
0bb7724a DG |
2043 | } |
2044 | ||
82528808 | 2045 | if (timer_signal_init()) { |
d086f507 JD |
2046 | retval = -1; |
2047 | goto exit_set_signal_handler; | |
2048 | } | |
2049 | ||
12744796 DG |
2050 | page_size = sysconf(_SC_PAGESIZE); |
2051 | if (page_size < 0) { | |
2052 | PERROR("sysconf _SC_PAGESIZE"); | |
2053 | page_size = LONG_MAX; | |
2054 | WARN("Fallback page size to %ld", page_size); | |
2055 | } | |
2056 | ||
e6142f2e JG |
2057 | ret = sessiond_config_init(&config); |
2058 | if (ret) { | |
2059 | retval = -1; | |
2060 | goto exit_set_signal_handler; | |
2061 | } | |
2062 | ||
2788b494 JR |
2063 | /* |
2064 | * Init config from environment variables. | |
2065 | * Command line option override env configuration per-doc. Do env first. | |
2066 | */ | |
2067 | sessiond_config_apply_env_config(&config); | |
2068 | ||
4a15001e MD |
2069 | /* |
2070 | * Parse arguments and load the daemon configuration file. | |
2071 | * | |
2072 | * We have an exit_options exit path to free memory reserved by | |
2073 | * set_options. This is needed because the rest of sessiond_cleanup() | |
2074 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
2075 | * depends on set_options. | |
2076 | */ | |
fac6795d | 2077 | progname = argv[0]; |
4a15001e MD |
2078 | if (set_options(argc, argv)) { |
2079 | retval = -1; | |
2080 | goto exit_options; | |
fac6795d DG |
2081 | } |
2082 | ||
e6142f2e JG |
2083 | /* |
2084 | * Resolve all paths received as arguments, configuration option, or | |
2085 | * through environment variable as absolute paths. This is necessary | |
2086 | * since daemonizing causes the sessiond's current working directory | |
2087 | * to '/'. | |
2088 | */ | |
2089 | ret = sessiond_config_resolve_paths(&config); | |
2090 | if (ret) { | |
2091 | goto exit_options; | |
2092 | } | |
2093 | ||
2094 | /* Apply config. */ | |
2095 | lttng_opt_verbose = config.verbose; | |
2096 | lttng_opt_quiet = config.quiet; | |
2097 | kconsumer_data.err_unix_sock_path = | |
2098 | config.kconsumerd_err_unix_sock_path.value; | |
2099 | kconsumer_data.cmd_unix_sock_path = | |
2100 | config.kconsumerd_cmd_unix_sock_path.value; | |
2101 | ustconsumer32_data.err_unix_sock_path = | |
2102 | config.consumerd32_err_unix_sock_path.value; | |
2103 | ustconsumer32_data.cmd_unix_sock_path = | |
2104 | config.consumerd32_cmd_unix_sock_path.value; | |
2105 | ustconsumer64_data.err_unix_sock_path = | |
2106 | config.consumerd64_err_unix_sock_path.value; | |
2107 | ustconsumer64_data.cmd_unix_sock_path = | |
2108 | config.consumerd64_cmd_unix_sock_path.value; | |
2109 | set_clock_plugin_env(); | |
2110 | ||
2111 | sessiond_config_log(&config); | |
2112 | ||
f472090a JG |
2113 | if (create_lttng_rundir()) { |
2114 | retval = -1; | |
2115 | goto exit_options; | |
2116 | } | |
2117 | ||
2118 | /* Abort launch if a session daemon is already running. */ | |
2119 | if (check_existing_daemon()) { | |
2120 | ERR("A session daemon is already running."); | |
2121 | retval = -1; | |
2122 | goto exit_options; | |
2123 | } | |
2124 | ||
fac6795d | 2125 | /* Daemonize */ |
e6142f2e | 2126 | if (config.daemonize || config.background) { |
ceed52b5 MD |
2127 | int i; |
2128 | ||
72dd7491 | 2129 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 2130 | !config.background); |
53094c05 | 2131 | if (ret < 0) { |
4a15001e MD |
2132 | retval = -1; |
2133 | goto exit_options; | |
53094c05 | 2134 | } |
0bb7724a | 2135 | |
ceed52b5 | 2136 | /* |
0bb7724a | 2137 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 2138 | * closed, in case we are called with more opened file |
f472090a | 2139 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
2140 | */ |
2141 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
2142 | if (i == lockfile_fd) { |
2143 | continue; | |
2144 | } | |
ceed52b5 MD |
2145 | (void) close(i); |
2146 | } | |
2147 | } | |
2148 | ||
7567352f MD |
2149 | if (run_as_create_worker(argv[0]) < 0) { |
2150 | goto exit_create_run_as_worker_cleanup; | |
2151 | } | |
2152 | ||
4a15001e MD |
2153 | /* |
2154 | * Starting from here, we can create threads. This needs to be after | |
2155 | * lttng_daemonize due to RCU. | |
2156 | */ | |
2157 | ||
2158 | /* | |
2159 | * Initialize the health check subsystem. This call should set the | |
2160 | * appropriate time values. | |
2161 | */ | |
2162 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
2163 | if (!health_sessiond) { | |
2164 | PERROR("health_app_create error"); | |
2165 | retval = -1; | |
2166 | goto exit_health_sessiond_cleanup; | |
2167 | } | |
2168 | ||
4a15001e | 2169 | /* Create thread to clean up RCU hash tables */ |
548468b9 JG |
2170 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
2171 | if (!ht_cleanup_thread) { | |
4a15001e MD |
2172 | retval = -1; |
2173 | goto exit_ht_cleanup; | |
2174 | } | |
2175 | ||
ceed52b5 | 2176 | /* Create thread quit pipe */ |
51bb4dbb | 2177 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e MD |
2178 | retval = -1; |
2179 | goto exit_init_data; | |
fac6795d DG |
2180 | } |
2181 | ||
2182 | /* Check if daemon is UID = 0 */ | |
2183 | is_root = !getuid(); | |
fac6795d | 2184 | if (is_root) { |
67e40797 | 2185 | /* Create global run dir with root access */ |
67e40797 | 2186 | |
b3530820 JG |
2187 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
2188 | if (!kernel_channel_monitor_pipe) { | |
2189 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
2190 | retval = -1; | |
2191 | goto exit_init_data; | |
2192 | } | |
2193 | kconsumer_data.channel_monitor_pipe = | |
2194 | lttng_pipe_release_writefd( | |
2195 | kernel_channel_monitor_pipe); | |
2196 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
2197 | retval = -1; | |
2198 | goto exit_init_data; | |
2199 | } | |
fac6795d DG |
2200 | } |
2201 | ||
5c827ce0 DG |
2202 | /* Set consumer initial state */ |
2203 | kernel_consumerd_state = CONSUMER_STOPPED; | |
2204 | ust_consumerd_state = CONSUMER_STOPPED; | |
2205 | ||
b3530820 JG |
2206 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
2207 | if (!ust32_channel_monitor_pipe) { | |
2208 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
2209 | retval = -1; | |
2210 | goto exit_init_data; | |
2211 | } | |
2212 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
2213 | ust32_channel_monitor_pipe); | |
2214 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
2215 | retval = -1; | |
2216 | goto exit_init_data; | |
2217 | } | |
62c43103 | 2218 | |
d086f507 | 2219 | /* |
82528808 JG |
2220 | * The rotation_thread_timer_queue structure is shared between the |
2221 | * sessiond timer thread and the rotation thread. The main thread keeps | |
2222 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 2223 | */ |
82528808 | 2224 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
2225 | if (!rotation_timer_queue) { |
2226 | retval = -1; | |
2227 | goto exit_init_data; | |
2228 | } | |
a5ab9e05 JG |
2229 | timer_thread_parameters.rotation_thread_job_queue = |
2230 | rotation_timer_queue; | |
67e40797 | 2231 | |
b3530820 JG |
2232 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
2233 | if (!ust64_channel_monitor_pipe) { | |
2234 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
2235 | retval = -1; | |
2236 | goto exit_init_data; | |
2237 | } | |
2238 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
2239 | ust64_channel_monitor_pipe); | |
2240 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
2241 | retval = -1; | |
2242 | goto exit_init_data; | |
2243 | } | |
847177cd | 2244 | |
1427f9b2 DG |
2245 | /* |
2246 | * Init UST app hash table. Alloc hash table before this point since | |
2247 | * cleanup() can get called after that point. | |
2248 | */ | |
4a15001e | 2249 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 2250 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
2251 | retval = -1; |
2252 | goto exit_init_data; | |
2253 | } | |
1427f9b2 | 2254 | |
6a4e4039 JG |
2255 | /* |
2256 | * Initialize agent app hash table. We allocate the hash table here | |
2257 | * since cleanup() can get called after this point. | |
2258 | */ | |
2259 | if (agent_app_ht_alloc()) { | |
2260 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
2261 | retval = -1; |
2262 | goto exit_init_data; | |
f20baf8e DG |
2263 | } |
2264 | ||
a88df331 DG |
2265 | /* |
2266 | * These actions must be executed as root. We do that *after* setting up | |
2267 | * the sockets path because we MUST make the check for another daemon using | |
2268 | * those paths *before* trying to set the kernel consumer sockets and init | |
2269 | * kernel tracer. | |
2270 | */ | |
2271 | if (is_root) { | |
e6142f2e | 2272 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
2273 | retval = -1; |
2274 | goto exit_init_data; | |
7753dea8 MD |
2275 | } |
2276 | ||
a88df331 | 2277 | /* Setup kernel tracer */ |
e6142f2e | 2278 | if (!config.no_kernel) { |
4fba7219 | 2279 | init_kernel_tracer(); |
89588270 DG |
2280 | if (kernel_tracer_fd >= 0) { |
2281 | ret = syscall_init_table(); | |
2282 | if (ret < 0) { | |
4a15001e MD |
2283 | ERR("Unable to populate syscall table. " |
2284 | "Syscall tracing won't work " | |
2285 | "for this session daemon."); | |
89588270 | 2286 | } |
834978fd | 2287 | } |
4fba7219 | 2288 | } |
a88df331 DG |
2289 | |
2290 | /* Set ulimit for open files */ | |
2291 | set_ulimit(); | |
fac6795d | 2292 | } |
4063050c MD |
2293 | /* init lttng_fd tracking must be done after set_ulimit. */ |
2294 | lttng_fd_init(); | |
fac6795d | 2295 | |
e6142f2e | 2296 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
2297 | retval = -1; |
2298 | goto exit_init_data; | |
67e40797 DG |
2299 | } |
2300 | ||
e6142f2e | 2301 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
2302 | retval = -1; |
2303 | goto exit_init_data; | |
67e40797 DG |
2304 | } |
2305 | ||
fac6795d | 2306 | /* Set credentials to socket */ |
e6142f2e | 2307 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
2308 | retval = -1; |
2309 | goto exit_init_data; | |
fac6795d DG |
2310 | } |
2311 | ||
5b8719f5 | 2312 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 2313 | if (config.sig_parent) { |
5b8719f5 DG |
2314 | ppid = getppid(); |
2315 | } | |
2316 | ||
7a485870 | 2317 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 2318 | if (is_root && !config.no_kernel) { |
4a15001e MD |
2319 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
2320 | retval = -1; | |
2321 | goto exit_init_data; | |
6620da75 | 2322 | } |
7a485870 DG |
2323 | } |
2324 | ||
099e26bd | 2325 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
2326 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
2327 | retval = -1; | |
2328 | goto exit_init_data; | |
099e26bd DG |
2329 | } |
2330 | ||
d0b96690 | 2331 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
2332 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
2333 | retval = -1; | |
2334 | goto exit_init_data; | |
d0b96690 DG |
2335 | } |
2336 | ||
7972aab2 DG |
2337 | /* Initialize global buffer per UID and PID registry. */ |
2338 | buffer_reg_init_uid_registry(); | |
2339 | buffer_reg_init_pid_registry(); | |
2340 | ||
099e26bd | 2341 | /* Init UST command queue. */ |
8bdee6e2 | 2342 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 2343 | |
2f77fc4b | 2344 | cmd_init(); |
00e2e675 | 2345 | |
ae9e45b3 DG |
2346 | /* Check for the application socket timeout env variable. */ |
2347 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
2348 | if (env_app_timeout) { | |
e6142f2e | 2349 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 2350 | } else { |
e6142f2e | 2351 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
2352 | } |
2353 | ||
4a15001e MD |
2354 | ret = write_pidfile(); |
2355 | if (ret) { | |
2356 | ERR("Error in write_pidfile"); | |
2357 | retval = -1; | |
2358 | goto exit_init_data; | |
2359 | } | |
35f90c40 | 2360 | |
554831e7 MD |
2361 | /* Initialize communication library */ |
2362 | lttcomm_init(); | |
4a15001e | 2363 | /* Initialize TCP timeout values */ |
d831c249 | 2364 | lttcomm_inet_init(); |
554831e7 | 2365 | |
ef367a93 | 2366 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
2367 | retval = -1; |
2368 | goto exit_init_data; | |
ef367a93 | 2369 | } |
e6142f2e | 2370 | load_info->path = config.load_session_path.value; |
ef367a93 | 2371 | |
12b4fb37 | 2372 | /* Create health-check thread. */ |
225221a8 | 2373 | if (!launch_health_management_thread()) { |
4a15001e | 2374 | retval = -1; |
44a5e5eb DG |
2375 | goto exit_health; |
2376 | } | |
2377 | ||
b3530820 JG |
2378 | /* notification_thread_data acquires the pipes' read side. */ |
2379 | notification_thread_handle = notification_thread_handle_create( | |
2380 | ust32_channel_monitor_pipe, | |
2381 | ust64_channel_monitor_pipe, | |
8898b0da | 2382 | kernel_channel_monitor_pipe); |
b3530820 JG |
2383 | if (!notification_thread_handle) { |
2384 | retval = -1; | |
2385 | ERR("Failed to create notification thread shared data"); | |
b3530820 JG |
2386 | goto exit_notification; |
2387 | } | |
2388 | ||
2389 | /* Create notification thread. */ | |
8898b0da | 2390 | if (!launch_notification_thread(notification_thread_handle)) { |
b3530820 | 2391 | retval = -1; |
b3530820 JG |
2392 | goto exit_notification; |
2393 | } | |
2394 | ||
d086f507 | 2395 | /* Create timer thread. */ |
a5ab9e05 | 2396 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 2397 | retval = -1; |
d086f507 JD |
2398 | goto exit_notification; |
2399 | } | |
d086f507 | 2400 | |
db66e574 JD |
2401 | /* rotation_thread_data acquires the pipes' read side. */ |
2402 | rotation_thread_handle = rotation_thread_handle_create( | |
90936dcf | 2403 | rotation_timer_queue, |
8898b0da | 2404 | notification_thread_handle); |
db66e574 JD |
2405 | if (!rotation_thread_handle) { |
2406 | retval = -1; | |
2407 | ERR("Failed to create rotation thread shared data"); | |
2408 | stop_threads(); | |
2409 | goto exit_rotation; | |
2410 | } | |
db66e574 JD |
2411 | |
2412 | /* Create rotation thread. */ | |
a430759b | 2413 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 2414 | retval = -1; |
db66e574 JD |
2415 | goto exit_rotation; |
2416 | } | |
2417 | ||
cf3af59e | 2418 | /* Create thread to manage the client socket */ |
050e613c JG |
2419 | client_thread = launch_client_thread(); |
2420 | if (!client_thread) { | |
4a15001e | 2421 | retval = -1; |
cf3af59e MD |
2422 | goto exit_client; |
2423 | } | |
fac6795d | 2424 | |
dd5875e7 JG |
2425 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], |
2426 | apps_cmd_notify_pipe[1])) { | |
4a15001e | 2427 | retval = -1; |
099e26bd DG |
2428 | goto exit_dispatch; |
2429 | } | |
2430 | ||
2431 | /* Create thread to manage application registration. */ | |
22b80785 | 2432 | if (!launch_application_registration_thread(&ust_cmd_queue)) { |
4a15001e | 2433 | retval = -1; |
099e26bd DG |
2434 | goto exit_reg_apps; |
2435 | } | |
2436 | ||
cf3af59e | 2437 | /* Create thread to manage application socket */ |
cdffb210 | 2438 | if (!launch_application_management_thread(apps_cmd_pipe[0])) { |
4a15001e | 2439 | retval = -1; |
d0b96690 DG |
2440 | goto exit_apps; |
2441 | } | |
2442 | ||
2443 | /* Create thread to manage application notify socket */ | |
53c51aaa | 2444 | if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) { |
4a15001e | 2445 | retval = -1; |
9563b0ad | 2446 | goto exit_apps_notify; |
cf3af59e | 2447 | } |
fac6795d | 2448 | |
7baf7871 JG |
2449 | /* Create agent management thread. */ |
2450 | if (!launch_agent_management_thread()) { | |
4a15001e | 2451 | retval = -1; |
022d91ba | 2452 | goto exit_agent_reg; |
4d076222 DG |
2453 | } |
2454 | ||
6620da75 | 2455 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 2456 | if (is_root && !config.no_kernel) { |
6620da75 | 2457 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 2458 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 2459 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
2460 | if (ret) { |
2461 | errno = ret; | |
6620da75 | 2462 | PERROR("pthread_create kernel"); |
4a15001e | 2463 | retval = -1; |
b3530820 | 2464 | stop_threads(); |
6620da75 DG |
2465 | goto exit_kernel; |
2466 | } | |
ef367a93 | 2467 | } |
7a485870 | 2468 | |
4a15001e | 2469 | /* Create session loading thread. */ |
1a1a34b4 MJ |
2470 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
2471 | thread_load_session, load_info); | |
4a15001e MD |
2472 | if (ret) { |
2473 | errno = ret; | |
2474 | PERROR("pthread_create load_session_thread"); | |
2475 | retval = -1; | |
b3530820 | 2476 | stop_threads(); |
4a15001e MD |
2477 | goto exit_load_session; |
2478 | } | |
2479 | ||
2480 | /* | |
2481 | * This is where we start awaiting program completion (e.g. through | |
2482 | * signal that asks threads to teardown). | |
2483 | */ | |
2484 | ||
2485 | ret = pthread_join(load_session_thread, &status); | |
2486 | if (ret) { | |
2487 | errno = ret; | |
2488 | PERROR("pthread_join load_session_thread"); | |
2489 | retval = -1; | |
2490 | } | |
6af972a2 JG |
2491 | |
2492 | /* Initiate teardown once activity occurs on the quit pipe. */ | |
2493 | sessiond_wait_for_quit_pipe(-1U); | |
050e613c JG |
2494 | |
2495 | /* | |
2496 | * Ensure that the client thread is no longer accepting new commands, | |
2497 | * which could cause new sessions to be created. | |
2498 | */ | |
2499 | if (!lttng_thread_shutdown(client_thread)) { | |
2500 | ERR("Failed to shutdown the client thread, continuing teardown"); | |
2501 | lttng_thread_put(client_thread); | |
2502 | client_thread = NULL; | |
2503 | } | |
2504 | ||
6af972a2 | 2505 | destroy_all_sessions_and_wait(); |
4a15001e | 2506 | exit_load_session: |
ef367a93 | 2507 | |
e6142f2e | 2508 | if (is_root && !config.no_kernel) { |
6620da75 | 2509 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
2510 | if (ret) { |
2511 | errno = ret; | |
6620da75 | 2512 | PERROR("pthread_join"); |
4a15001e | 2513 | retval = -1; |
6620da75 | 2514 | } |
fac6795d | 2515 | } |
cf3af59e | 2516 | exit_kernel: |
022d91ba | 2517 | exit_agent_reg: |
9563b0ad | 2518 | exit_apps_notify: |
cf3af59e | 2519 | exit_apps: |
099e26bd | 2520 | exit_reg_apps: |
099e26bd | 2521 | exit_dispatch: |
b3530820 | 2522 | exit_client: |
db66e574 | 2523 | exit_rotation: |
b3530820 | 2524 | exit_notification: |
548468b9 | 2525 | lttng_thread_list_shutdown_orphans(); |
b3530820 | 2526 | exit_health: |
4a15001e | 2527 | exit_init_data: |
050e613c JG |
2528 | if (client_thread) { |
2529 | lttng_thread_put(client_thread); | |
2530 | } | |
2531 | ||
4d62fbf8 MD |
2532 | /* |
2533 | * Wait for all pending call_rcu work to complete before tearing | |
2534 | * down data structures. call_rcu worker may be trying to | |
2535 | * perform lookups in those structures. | |
2536 | */ | |
2537 | rcu_barrier(); | |
4a15001e MD |
2538 | /* |
2539 | * sessiond_cleanup() is called when no other thread is running, except | |
2540 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
2541 | */ | |
2542 | rcu_thread_online(); | |
2543 | sessiond_cleanup(); | |
06f525de | 2544 | |
c4d5de9d JG |
2545 | /* |
2546 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
2547 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
2548 | * the queue is empty before shutting down the clean-up thread. | |
2549 | */ | |
2550 | rcu_barrier(); | |
2551 | ||
548468b9 JG |
2552 | if (ht_cleanup_thread) { |
2553 | lttng_thread_shutdown(ht_cleanup_thread); | |
2554 | lttng_thread_put(ht_cleanup_thread); | |
2555 | } | |
2556 | ||
a430759b JG |
2557 | rcu_thread_offline(); |
2558 | rcu_unregister_thread(); | |
2559 | ||
2560 | if (rotation_thread_handle) { | |
2561 | rotation_thread_handle_destroy(rotation_thread_handle); | |
2562 | } | |
2563 | ||
d086f507 JD |
2564 | /* |
2565 | * After the rotation and timer thread have quit, we can safely destroy | |
2566 | * the rotation_timer_queue. | |
2567 | */ | |
82528808 | 2568 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
8898b0da JG |
2569 | /* |
2570 | * The teardown of the notification system is performed after the | |
2571 | * session daemon's teardown in order to allow it to be notified | |
2572 | * of the active session and channels at the moment of the teardown. | |
2573 | */ | |
2574 | if (notification_thread_handle) { | |
2575 | notification_thread_handle_destroy(notification_thread_handle); | |
2576 | } | |
b3530820 JG |
2577 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
2578 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
2579 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
0b2dc8df | 2580 | exit_ht_cleanup: |
4a15001e | 2581 | |
4a15001e MD |
2582 | health_app_destroy(health_sessiond); |
2583 | exit_health_sessiond_cleanup: | |
7567352f | 2584 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
2585 | |
2586 | exit_options: | |
f472090a | 2587 | sessiond_cleanup_lock_file(); |
4a15001e MD |
2588 | sessiond_cleanup_options(); |
2589 | ||
2590 | exit_set_signal_handler: | |
2591 | if (!retval) { | |
cf3af59e | 2592 | exit(EXIT_SUCCESS); |
4a15001e MD |
2593 | } else { |
2594 | exit(EXIT_FAILURE); | |
67e40797 | 2595 | } |
fac6795d | 2596 | } |