Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
fac6795d | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
91d76f53 | 7 | * |
fac6795d DG |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
fac6795d DG |
11 | #include <getopt.h> |
12 | #include <grp.h> | |
13 | #include <limits.h> | |
0bb7724a | 14 | #include <paths.h> |
fac6795d DG |
15 | #include <pthread.h> |
16 | #include <signal.h> | |
17 | #include <stdio.h> | |
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
331744e3 | 20 | #include <inttypes.h> |
0fdd1e2c | 21 | #include <sys/mman.h> |
b73401da | 22 | #include <sys/mount.h> |
1e307fab | 23 | #include <sys/resource.h> |
fac6795d DG |
24 | #include <sys/socket.h> |
25 | #include <sys/stat.h> | |
26 | #include <sys/types.h> | |
0fdd1e2c | 27 | #include <sys/wait.h> |
5c827ce0 | 28 | #include <urcu/uatomic.h> |
fac6795d | 29 | #include <unistd.h> |
4f0b90ee | 30 | #include <ctype.h> |
fac6795d | 31 | |
990570ed | 32 | #include <common/common.h> |
d27c42b8 | 33 | #include <common/compat/socket.h> |
e8fa9fb0 | 34 | #include <common/compat/getenv.h> |
db758600 DG |
35 | #include <common/defaults.h> |
36 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 37 | #include <common/futex.h> |
00e2e675 | 38 | #include <common/relayd/relayd.h> |
81b86775 | 39 | #include <common/utils.h> |
3ccdf997 | 40 | #include <common/daemonize.h> |
f40ef1d5 | 41 | #include <common/config/session-config.h> |
dcabc190 | 42 | #include <common/dynamic-buffer.h> |
76fcf151 | 43 | #include <lttng/event-internal.h> |
fac6795d | 44 | |
10a8a223 | 45 | #include "lttng-sessiond.h" |
7972aab2 | 46 | #include "buffer-registry.h" |
54d01ffb | 47 | #include "channel.h" |
2f77fc4b | 48 | #include "cmd.h" |
00e2e675 | 49 | #include "consumer.h" |
099e26bd | 50 | #include "context.h" |
54d01ffb | 51 | #include "event.h" |
90aa04a1 | 52 | #include "event-notifier-error-accounting.h" |
4771f025 | 53 | #include "kernel.h" |
f1e16794 | 54 | #include "kernel-consumer.h" |
75018ab6 | 55 | #include "lttng-ust-ctl.h" |
00e2e675 | 56 | #include "ust-consumer.h" |
8e68d1c8 | 57 | #include "utils.h" |
4063050c | 58 | #include "fd-limit.h" |
8782cc74 | 59 | #include "health-sessiond.h" |
8ac94142 | 60 | #include "testpoint.h" |
f9d2ba6a | 61 | #include "notify-apps.h" |
022d91ba | 62 | #include "agent-thread.h" |
fb198a11 | 63 | #include "save.h" |
b3530820 JG |
64 | #include "notification-thread.h" |
65 | #include "notification-thread-commands.h" | |
db66e574 | 66 | #include "rotation-thread.h" |
7c1d2758 | 67 | #include "agent.h" |
5e97de00 | 68 | #include "ht-cleanup.h" |
e6142f2e | 69 | #include "sessiond-config.h" |
8e319828 | 70 | #include "timer.h" |
a3707772 | 71 | #include "thread.h" |
917a718d | 72 | #include "client.h" |
5d1b0219 | 73 | #include "dispatch.h" |
1785d7f2 | 74 | #include "register.h" |
7649924e | 75 | #include "manage-apps.h" |
5b093681 | 76 | #include "manage-kernel.h" |
1d25334c | 77 | #include "modprobe.h" |
881fc67f | 78 | #include "ust-sigbus.h" |
ebaeda94 | 79 | |
4fc83d94 PP |
80 | static const char *help_msg = |
81 | #ifdef LTTNG_EMBED_HELP | |
82 | #include <lttng-sessiond.8.h> | |
83 | #else | |
84 | NULL | |
85 | #endif | |
86 | ; | |
87 | ||
90aa04a1 | 88 | #define EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX 65535 |
761ffce2 FD |
89 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR \ |
90 | "event-notifier-error-buffer-size" | |
91 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR \ | |
92 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR "-kernel" | |
93 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR \ | |
94 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR "-userspace" | |
95 | ||
90aa04a1 | 96 | |
fac6795d | 97 | const char *progname; |
c9cb3e7d | 98 | static int lockfile_fd = -1; |
a3bc3918 | 99 | static int opt_print_version; |
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' }, | |
761ffce2 FD |
134 | { EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, required_argument, 0, '\0' }, |
135 | { EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, required_argument, 0, '\0' }, | |
26296c48 JG |
136 | { NULL, 0, 0, 0 } |
137 | }; | |
138 | ||
139 | /* Command line options to ignore from configuration file */ | |
140 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
1d4b027a | 141 | |
099e26bd DG |
142 | /* |
143 | * This pipe is used to inform the thread managing application communication | |
144 | * that a command is queued and ready to be processed. | |
145 | */ | |
76d7553f | 146 | static int apps_cmd_pipe[2] = { -1, -1 }; |
971a61c6 | 147 | static int apps_cmd_notify_pipe[2] = { -1, -1 }; |
099e26bd | 148 | |
099e26bd DG |
149 | /* |
150 | * UST registration command queue. This queue is tied with a futex and uses a N | |
151 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
152 | * | |
b22c5da8 DG |
153 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
154 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
155 | * the line new application socket and monitors it for any I/O error or clean | |
156 | * close that triggers an unregistration of the application. | |
099e26bd DG |
157 | */ |
158 | static struct ust_cmd_queue ust_cmd_queue; | |
159 | ||
97bc1426 | 160 | /* |
a7333da7 | 161 | * Section name to look for in the daemon configuration file. |
97bc1426 | 162 | */ |
a7333da7 | 163 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 164 | |
a7333da7 JG |
165 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
166 | static int is_root; | |
5eb91c98 | 167 | |
099e26bd DG |
168 | /* |
169 | * Stop all threads by closing the thread quit pipe. | |
170 | */ | |
cf3af59e MD |
171 | static void stop_threads(void) |
172 | { | |
5eb91c98 DG |
173 | int ret; |
174 | ||
cf3af59e MD |
175 | /* Stopping all threads */ |
176 | DBG("Terminating all threads"); | |
a7333da7 | 177 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
178 | if (ret < 0) { |
179 | ERR("write error on thread quit pipe"); | |
180 | } | |
cf3af59e MD |
181 | } |
182 | ||
e975f9f8 DG |
183 | /* |
184 | * Close every consumer sockets. | |
185 | */ | |
186 | static void close_consumer_sockets(void) | |
187 | { | |
188 | int ret; | |
189 | ||
412d7227 SM |
190 | if (the_kconsumer_data.err_sock >= 0) { |
191 | ret = close(the_kconsumer_data.err_sock); | |
e975f9f8 DG |
192 | if (ret < 0) { |
193 | PERROR("kernel consumer err_sock close"); | |
194 | } | |
195 | } | |
412d7227 SM |
196 | if (the_ustconsumer32_data.err_sock >= 0) { |
197 | ret = close(the_ustconsumer32_data.err_sock); | |
e975f9f8 | 198 | if (ret < 0) { |
a76cbd9f | 199 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
200 | } |
201 | } | |
412d7227 SM |
202 | if (the_ustconsumer64_data.err_sock >= 0) { |
203 | ret = close(the_ustconsumer64_data.err_sock); | |
e975f9f8 | 204 | if (ret < 0) { |
a76cbd9f | 205 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
206 | } |
207 | } | |
412d7227 SM |
208 | if (the_kconsumer_data.cmd_sock >= 0) { |
209 | ret = close(the_kconsumer_data.cmd_sock); | |
e975f9f8 DG |
210 | if (ret < 0) { |
211 | PERROR("kernel consumer cmd_sock close"); | |
212 | } | |
213 | } | |
412d7227 SM |
214 | if (the_ustconsumer32_data.cmd_sock >= 0) { |
215 | ret = close(the_ustconsumer32_data.cmd_sock); | |
e975f9f8 | 216 | if (ret < 0) { |
a76cbd9f | 217 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
218 | } |
219 | } | |
412d7227 SM |
220 | if (the_ustconsumer64_data.cmd_sock >= 0) { |
221 | ret = close(the_ustconsumer64_data.cmd_sock); | |
e975f9f8 | 222 | if (ret < 0) { |
a76cbd9f | 223 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
224 | } |
225 | } | |
412d7227 SM |
226 | if (the_kconsumer_data.channel_monitor_pipe >= 0) { |
227 | ret = close(the_kconsumer_data.channel_monitor_pipe); | |
b3530820 JG |
228 | if (ret < 0) { |
229 | PERROR("kernel consumer channel monitor pipe close"); | |
230 | } | |
231 | } | |
412d7227 SM |
232 | if (the_ustconsumer32_data.channel_monitor_pipe >= 0) { |
233 | ret = close(the_ustconsumer32_data.channel_monitor_pipe); | |
b3530820 JG |
234 | if (ret < 0) { |
235 | PERROR("UST consumerd32 channel monitor pipe close"); | |
236 | } | |
237 | } | |
412d7227 SM |
238 | if (the_ustconsumer64_data.channel_monitor_pipe >= 0) { |
239 | ret = close(the_ustconsumer64_data.channel_monitor_pipe); | |
b3530820 JG |
240 | if (ret < 0) { |
241 | PERROR("UST consumerd64 channel monitor pipe close"); | |
242 | } | |
243 | } | |
e975f9f8 DG |
244 | } |
245 | ||
4e4714cb JR |
246 | /* |
247 | * Wait on consumer process termination. | |
248 | * | |
249 | * Need to be called with the consumer data lock held or from a context | |
250 | * ensuring no concurrent access to data (e.g: cleanup). | |
251 | */ | |
252 | static void wait_consumer(struct consumer_data *consumer_data) | |
253 | { | |
254 | pid_t ret; | |
255 | int status; | |
256 | ||
257 | if (consumer_data->pid <= 0) { | |
258 | return; | |
259 | } | |
260 | ||
261 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
262 | consumer_data->pid); | |
263 | ret = waitpid(consumer_data->pid, &status, 0); | |
264 | if (ret == -1) { | |
265 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 266 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
267 | ERR("consumerd termination with error: %d", |
268 | WEXITSTATUS(ret)); | |
269 | } | |
270 | consumer_data->pid = 0; | |
271 | } | |
272 | ||
fac6795d | 273 | /* |
4a15001e | 274 | * Cleanup the session daemon's data structures. |
fac6795d | 275 | */ |
4a15001e | 276 | static void sessiond_cleanup(void) |
fac6795d | 277 | { |
ef599319 | 278 | int ret; |
e32d7f27 | 279 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 280 | |
4a15001e | 281 | DBG("Cleanup sessiond"); |
e07ae692 | 282 | |
4e449f3f MD |
283 | /* |
284 | * Close the thread quit pipe. It has already done its job, | |
285 | * since we are now called. | |
286 | */ | |
a7333da7 | 287 | sessiond_close_quit_pipe(); |
971a61c6 JG |
288 | utils_close_pipe(apps_cmd_pipe); |
289 | utils_close_pipe(apps_cmd_notify_pipe); | |
412d7227 | 290 | utils_close_pipe(the_kernel_poll_pipe); |
2f77fc4b | 291 | |
412d7227 | 292 | ret = remove(the_config.pid_file_path.value); |
c9a2957d | 293 | if (ret < 0) { |
412d7227 | 294 | PERROR("remove pidfile %s", the_config.pid_file_path.value); |
35f90c40 DG |
295 | } |
296 | ||
e6142f2e | 297 | DBG("Removing sessiond and consumerd content of directory %s", |
412d7227 | 298 | the_config.rundir.value); |
8c6c56c2 MD |
299 | |
300 | /* sessiond */ | |
412d7227 SM |
301 | DBG("Removing %s", the_config.pid_file_path.value); |
302 | (void) unlink(the_config.pid_file_path.value); | |
8c6c56c2 | 303 | |
412d7227 SM |
304 | DBG("Removing %s", the_config.agent_port_file_path.value); |
305 | (void) unlink(the_config.agent_port_file_path.value); | |
cd9290dd | 306 | |
8c6c56c2 | 307 | /* kconsumerd */ |
412d7227 SM |
308 | DBG("Removing %s", the_kconsumer_data.err_unix_sock_path); |
309 | (void) unlink(the_kconsumer_data.err_unix_sock_path); | |
e6142f2e | 310 | |
412d7227 SM |
311 | DBG("Removing directory %s", the_config.kconsumerd_path.value); |
312 | (void) rmdir(the_config.kconsumerd_path.value); | |
8c6c56c2 MD |
313 | |
314 | /* ust consumerd 32 */ | |
412d7227 SM |
315 | DBG("Removing %s", the_config.consumerd32_err_unix_sock_path.value); |
316 | (void) unlink(the_config.consumerd32_err_unix_sock_path.value); | |
e6142f2e | 317 | |
412d7227 SM |
318 | DBG("Removing directory %s", the_config.consumerd32_path.value); |
319 | (void) rmdir(the_config.consumerd32_path.value); | |
8c6c56c2 MD |
320 | |
321 | /* ust consumerd 64 */ | |
412d7227 SM |
322 | DBG("Removing %s", the_config.consumerd64_err_unix_sock_path.value); |
323 | (void) unlink(the_config.consumerd64_err_unix_sock_path.value); | |
e6142f2e | 324 | |
412d7227 SM |
325 | DBG("Removing directory %s", the_config.consumerd64_path.value); |
326 | (void) rmdir(the_config.consumerd64_path.value); | |
5461b305 | 327 | |
99d688f2 | 328 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 329 | |
44760c20 JR |
330 | DBG("Cleaning up all per-event notifier domain agents"); |
331 | agent_by_event_notifier_domain_ht_destroy(); | |
332 | ||
6a4e4039 JG |
333 | DBG("Cleaning up all agent apps"); |
334 | agent_app_ht_clean(); | |
099e26bd | 335 | DBG("Closing all UST sockets"); |
56fff090 | 336 | ust_app_clean_list(); |
7972aab2 | 337 | buffer_reg_destroy_registries(); |
099e26bd | 338 | |
0787fc4b MD |
339 | close_consumer_sockets(); |
340 | ||
412d7227 SM |
341 | wait_consumer(&the_kconsumer_data); |
342 | wait_consumer(&the_ustconsumer64_data); | |
343 | wait_consumer(&the_ustconsumer32_data); | |
0787fc4b | 344 | |
412d7227 | 345 | if (is_root && !the_config.no_kernel) { |
7d268848 | 346 | cleanup_kernel_tracer(); |
2f50c8a3 | 347 | } |
2f77fc4b | 348 | |
c9cb3e7d JG |
349 | /* |
350 | * We do NOT rmdir rundir because there are other processes | |
351 | * using it, for instance lttng-relayd, which can start in | |
352 | * parallel with this teardown. | |
353 | */ | |
4a15001e MD |
354 | } |
355 | ||
356 | /* | |
357 | * Cleanup the daemon's option data structures. | |
358 | */ | |
359 | static void sessiond_cleanup_options(void) | |
360 | { | |
361 | DBG("Cleaning up options"); | |
362 | ||
412d7227 | 363 | sessiond_config_fini(&the_config); |
c9cb3e7d | 364 | |
7567352f | 365 | run_as_destroy_worker(); |
fac6795d DG |
366 | } |
367 | ||
917a718d | 368 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 369 | { |
917a718d | 370 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
371 | } |
372 | ||
00e2e675 | 373 | /* |
917a718d JG |
374 | * Take an option from the getopt output and set it in the right variable to be |
375 | * used later. | |
36b588ed | 376 | * |
917a718d | 377 | * Return 0 on success else a negative value. |
00e2e675 | 378 | */ |
917a718d | 379 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 380 | { |
917a718d | 381 | int ret = 0; |
fac6795d | 382 | |
c0232ea5 | 383 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
384 | if (!arg || *arg == '\0') { |
385 | ret = -EINVAL; | |
386 | goto end; | |
387 | } | |
e8fa9fb0 MD |
388 | if (lttng_is_setuid_setgid()) { |
389 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
390 | "-c, --client-sock"); | |
391 | } else { | |
412d7227 | 392 | config_string_set(&the_config.client_unix_sock_path, |
e6142f2e | 393 | strdup(arg)); |
412d7227 | 394 | if (!the_config.client_unix_sock_path.value) { |
e6142f2e JG |
395 | ret = -ENOMEM; |
396 | PERROR("strdup"); | |
397 | } | |
e8fa9fb0 | 398 | } |
c0232ea5 | 399 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
400 | if (!arg || *arg == '\0') { |
401 | ret = -EINVAL; | |
402 | goto end; | |
403 | } | |
e8fa9fb0 MD |
404 | if (lttng_is_setuid_setgid()) { |
405 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
406 | "-a, --apps-sock"); | |
407 | } else { | |
412d7227 | 408 | config_string_set(&the_config.apps_unix_sock_path, |
e6142f2e | 409 | strdup(arg)); |
412d7227 | 410 | if (!the_config.apps_unix_sock_path.value) { |
e6142f2e JG |
411 | ret = -ENOMEM; |
412 | PERROR("strdup"); | |
413 | } | |
e8fa9fb0 | 414 | } |
c0232ea5 | 415 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
412d7227 | 416 | the_config.daemonize = true; |
c0232ea5 | 417 | } else if (string_match(optname, "background") || opt == 'b') { |
412d7227 | 418 | the_config.background = true; |
c0232ea5 | 419 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
420 | if (!arg || *arg == '\0') { |
421 | ret = -EINVAL; | |
422 | goto end; | |
423 | } | |
e8fa9fb0 MD |
424 | if (lttng_is_setuid_setgid()) { |
425 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
426 | "-g, --group"); | |
427 | } else { | |
412d7227 | 428 | config_string_set(&the_config.tracing_group_name, |
e6142f2e | 429 | strdup(arg)); |
412d7227 | 430 | if (!the_config.tracing_group_name.value) { |
e8fa9fb0 | 431 | ret = -ENOMEM; |
e6142f2e | 432 | PERROR("strdup"); |
e8fa9fb0 | 433 | } |
db322c4d | 434 | } |
c0232ea5 | 435 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 436 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 437 | if (ret) { |
4fc83d94 | 438 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
439 | perror("exec"); |
440 | } | |
441 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 442 | } else if (string_match(optname, "version") || opt == 'V') { |
a3bc3918 | 443 | opt_print_version = 1; |
c0232ea5 | 444 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
412d7227 | 445 | the_config.sig_parent = true; |
c0232ea5 | 446 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
447 | if (!arg || *arg == '\0') { |
448 | ret = -EINVAL; | |
449 | goto end; | |
450 | } | |
e8fa9fb0 MD |
451 | if (lttng_is_setuid_setgid()) { |
452 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
453 | "--kconsumerd-err-sock"); | |
454 | } else { | |
412d7227 SM |
455 | config_string_set( |
456 | &the_config.kconsumerd_err_unix_sock_path, | |
e6142f2e | 457 | strdup(arg)); |
412d7227 | 458 | if (!the_config.kconsumerd_err_unix_sock_path.value) { |
e6142f2e JG |
459 | ret = -ENOMEM; |
460 | PERROR("strdup"); | |
461 | } | |
e8fa9fb0 | 462 | } |
c0232ea5 | 463 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
464 | if (!arg || *arg == '\0') { |
465 | ret = -EINVAL; | |
466 | goto end; | |
467 | } | |
e8fa9fb0 MD |
468 | if (lttng_is_setuid_setgid()) { |
469 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
470 | "--kconsumerd-cmd-sock"); | |
471 | } else { | |
412d7227 SM |
472 | config_string_set( |
473 | &the_config.kconsumerd_cmd_unix_sock_path, | |
e6142f2e | 474 | strdup(arg)); |
412d7227 | 475 | if (!the_config.kconsumerd_cmd_unix_sock_path.value) { |
e6142f2e JG |
476 | ret = -ENOMEM; |
477 | PERROR("strdup"); | |
478 | } | |
e8fa9fb0 | 479 | } |
c0232ea5 | 480 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
481 | if (!arg || *arg == '\0') { |
482 | ret = -EINVAL; | |
483 | goto end; | |
484 | } | |
e8fa9fb0 MD |
485 | if (lttng_is_setuid_setgid()) { |
486 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
487 | "--ustconsumerd64-err-sock"); | |
488 | } else { | |
412d7227 SM |
489 | config_string_set( |
490 | &the_config.consumerd64_err_unix_sock_path, | |
e6142f2e | 491 | strdup(arg)); |
412d7227 | 492 | if (!the_config.consumerd64_err_unix_sock_path.value) { |
e6142f2e JG |
493 | ret = -ENOMEM; |
494 | PERROR("strdup"); | |
495 | } | |
e8fa9fb0 | 496 | } |
c0232ea5 | 497 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
498 | if (!arg || *arg == '\0') { |
499 | ret = -EINVAL; | |
500 | goto end; | |
501 | } | |
e8fa9fb0 MD |
502 | if (lttng_is_setuid_setgid()) { |
503 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
504 | "--ustconsumerd64-cmd-sock"); | |
505 | } else { | |
412d7227 SM |
506 | config_string_set( |
507 | &the_config.consumerd64_cmd_unix_sock_path, | |
e6142f2e | 508 | strdup(arg)); |
412d7227 | 509 | if (!the_config.consumerd64_cmd_unix_sock_path.value) { |
e6142f2e JG |
510 | ret = -ENOMEM; |
511 | PERROR("strdup"); | |
512 | } | |
e8fa9fb0 | 513 | } |
c0232ea5 | 514 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
515 | if (!arg || *arg == '\0') { |
516 | ret = -EINVAL; | |
517 | goto end; | |
518 | } | |
e8fa9fb0 MD |
519 | if (lttng_is_setuid_setgid()) { |
520 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
521 | "--ustconsumerd32-err-sock"); | |
522 | } else { | |
412d7227 SM |
523 | config_string_set( |
524 | &the_config.consumerd32_err_unix_sock_path, | |
e6142f2e | 525 | strdup(arg)); |
412d7227 | 526 | if (!the_config.consumerd32_err_unix_sock_path.value) { |
e6142f2e JG |
527 | ret = -ENOMEM; |
528 | PERROR("strdup"); | |
529 | } | |
e8fa9fb0 | 530 | } |
c0232ea5 | 531 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
532 | if (!arg || *arg == '\0') { |
533 | ret = -EINVAL; | |
534 | goto end; | |
535 | } | |
e8fa9fb0 MD |
536 | if (lttng_is_setuid_setgid()) { |
537 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
538 | "--ustconsumerd32-cmd-sock"); | |
539 | } else { | |
412d7227 SM |
540 | config_string_set( |
541 | &the_config.consumerd32_cmd_unix_sock_path, | |
e6142f2e | 542 | strdup(arg)); |
412d7227 | 543 | if (!the_config.consumerd32_cmd_unix_sock_path.value) { |
e6142f2e JG |
544 | ret = -ENOMEM; |
545 | PERROR("strdup"); | |
546 | } | |
e8fa9fb0 | 547 | } |
c0232ea5 | 548 | } else if (string_match(optname, "no-kernel")) { |
412d7227 | 549 | the_config.no_kernel = true; |
c0232ea5 | 550 | } else if (string_match(optname, "quiet") || opt == 'q') { |
412d7227 | 551 | the_config.quiet = true; |
c0232ea5 | 552 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
553 | /* Verbose level can increase using multiple -v */ |
554 | if (arg) { | |
13755a18 | 555 | /* Value obtained from config file */ |
412d7227 | 556 | the_config.verbose = config_parse_value(arg); |
26296c48 | 557 | } else { |
13755a18 | 558 | /* -v used on command line */ |
412d7227 | 559 | the_config.verbose++; |
26296c48 | 560 | } |
13755a18 | 561 | /* Clamp value to [0, 3] */ |
412d7227 SM |
562 | the_config.verbose = the_config.verbose < 0 ? |
563 | 0 : | |
564 | (the_config.verbose <= 3 ? the_config.verbose : | |
565 | 3); | |
c0232ea5 | 566 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 567 | if (arg) { |
412d7227 | 568 | the_config.verbose_consumer = config_parse_value(arg); |
26296c48 | 569 | } else { |
412d7227 | 570 | the_config.verbose_consumer++; |
26296c48 | 571 | } |
c0232ea5 | 572 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
573 | if (!arg || *arg == '\0') { |
574 | ret = -EINVAL; | |
575 | goto end; | |
576 | } | |
e8fa9fb0 MD |
577 | if (lttng_is_setuid_setgid()) { |
578 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
579 | "--consumerd32-path"); | |
580 | } else { | |
412d7227 | 581 | config_string_set(&the_config.consumerd32_bin_path, |
e6142f2e | 582 | strdup(arg)); |
412d7227 | 583 | if (!the_config.consumerd32_bin_path.value) { |
e8fa9fb0 MD |
584 | PERROR("strdup"); |
585 | ret = -ENOMEM; | |
586 | } | |
db322c4d | 587 | } |
c0232ea5 | 588 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
589 | if (!arg || *arg == '\0') { |
590 | ret = -EINVAL; | |
591 | goto end; | |
592 | } | |
e8fa9fb0 MD |
593 | if (lttng_is_setuid_setgid()) { |
594 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
595 | "--consumerd32-libdir"); | |
596 | } else { | |
412d7227 | 597 | config_string_set(&the_config.consumerd32_lib_dir, |
e6142f2e | 598 | strdup(arg)); |
412d7227 | 599 | if (!the_config.consumerd32_lib_dir.value) { |
e8fa9fb0 MD |
600 | PERROR("strdup"); |
601 | ret = -ENOMEM; | |
602 | } | |
db322c4d | 603 | } |
c0232ea5 | 604 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
605 | if (!arg || *arg == '\0') { |
606 | ret = -EINVAL; | |
607 | goto end; | |
608 | } | |
e8fa9fb0 MD |
609 | if (lttng_is_setuid_setgid()) { |
610 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
611 | "--consumerd64-path"); | |
612 | } else { | |
412d7227 | 613 | config_string_set(&the_config.consumerd64_bin_path, |
e6142f2e | 614 | strdup(arg)); |
412d7227 | 615 | if (!the_config.consumerd64_bin_path.value) { |
e8fa9fb0 MD |
616 | PERROR("strdup"); |
617 | ret = -ENOMEM; | |
618 | } | |
db322c4d | 619 | } |
c0232ea5 | 620 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
621 | if (!arg || *arg == '\0') { |
622 | ret = -EINVAL; | |
623 | goto end; | |
624 | } | |
e8fa9fb0 MD |
625 | if (lttng_is_setuid_setgid()) { |
626 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
627 | "--consumerd64-libdir"); | |
628 | } else { | |
412d7227 | 629 | config_string_set(&the_config.consumerd64_lib_dir, |
e6142f2e | 630 | strdup(arg)); |
412d7227 | 631 | if (!the_config.consumerd64_lib_dir.value) { |
e8fa9fb0 MD |
632 | PERROR("strdup"); |
633 | ret = -ENOMEM; | |
634 | } | |
db322c4d | 635 | } |
c0232ea5 | 636 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
637 | if (!arg || *arg == '\0') { |
638 | ret = -EINVAL; | |
639 | goto end; | |
640 | } | |
e8fa9fb0 MD |
641 | if (lttng_is_setuid_setgid()) { |
642 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
643 | "-p, --pidfile"); | |
644 | } else { | |
412d7227 SM |
645 | config_string_set( |
646 | &the_config.pid_file_path, strdup(arg)); | |
647 | if (!the_config.pid_file_path.value) { | |
e8fa9fb0 MD |
648 | PERROR("strdup"); |
649 | ret = -ENOMEM; | |
650 | } | |
db322c4d | 651 | } |
c0232ea5 | 652 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
653 | if (!arg || *arg == '\0') { |
654 | ret = -EINVAL; | |
655 | goto end; | |
656 | } | |
e8fa9fb0 MD |
657 | if (lttng_is_setuid_setgid()) { |
658 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
659 | "--agent-tcp-port"); | |
660 | } else { | |
661 | unsigned long v; | |
4d076222 | 662 | |
e8fa9fb0 MD |
663 | errno = 0; |
664 | v = strtoul(arg, NULL, 0); | |
665 | if (errno != 0 || !isdigit(arg[0])) { | |
666 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
667 | return -1; | |
668 | } | |
669 | if (v == 0 || v >= 65535) { | |
670 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
671 | return -1; | |
672 | } | |
412d7227 SM |
673 | the_config.agent_tcp_port.begin = |
674 | the_config.agent_tcp_port.end = (int) v; | |
2288467f | 675 | DBG3("Agent TCP port set to non default: %i", (int) v); |
26296c48 | 676 | } |
c0232ea5 | 677 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
678 | if (!arg || *arg == '\0') { |
679 | ret = -EINVAL; | |
680 | goto end; | |
681 | } | |
e8fa9fb0 MD |
682 | if (lttng_is_setuid_setgid()) { |
683 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
684 | "-l, --load"); | |
685 | } else { | |
412d7227 SM |
686 | config_string_set(&the_config.load_session_path, |
687 | strdup(arg)); | |
688 | if (!the_config.load_session_path.value) { | |
e8fa9fb0 MD |
689 | PERROR("strdup"); |
690 | ret = -ENOMEM; | |
691 | } | |
ef367a93 | 692 | } |
c0232ea5 | 693 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
694 | if (!arg || *arg == '\0') { |
695 | ret = -EINVAL; | |
696 | goto end; | |
697 | } | |
e8fa9fb0 MD |
698 | if (lttng_is_setuid_setgid()) { |
699 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
700 | "--kmod-probes"); | |
701 | } else { | |
412d7227 SM |
702 | config_string_set(&the_config.kmod_probes_list, |
703 | strdup(arg)); | |
704 | if (!the_config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
705 | PERROR("strdup"); |
706 | ret = -ENOMEM; | |
707 | } | |
c9d42407 | 708 | } |
c0232ea5 | 709 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
710 | if (!arg || *arg == '\0') { |
711 | ret = -EINVAL; | |
712 | goto end; | |
713 | } | |
e8fa9fb0 MD |
714 | if (lttng_is_setuid_setgid()) { |
715 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
716 | "--extra-kmod-probes"); | |
717 | } else { | |
412d7227 | 718 | config_string_set(&the_config.kmod_extra_probes_list, |
e6142f2e | 719 | strdup(arg)); |
412d7227 | 720 | if (!the_config.kmod_extra_probes_list.value) { |
e8fa9fb0 MD |
721 | PERROR("strdup"); |
722 | ret = -ENOMEM; | |
723 | } | |
db322c4d | 724 | } |
761ffce2 | 725 | } else if (string_match(optname, EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR)) { |
90aa04a1 FD |
726 | unsigned long v; |
727 | ||
728 | errno = 0; | |
729 | v = strtoul(arg, NULL, 0); | |
730 | if (errno != 0 || !isdigit(arg[0])) { | |
761ffce2 FD |
731 | ERR("Wrong value in --%s parameter: %s", |
732 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, arg); | |
90aa04a1 FD |
733 | return -1; |
734 | } | |
735 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
761ffce2 FD |
736 | ERR("Value out of range for --%s parameter: %s", |
737 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, arg); | |
90aa04a1 FD |
738 | return -1; |
739 | } | |
761ffce2 FD |
740 | the_config.event_notifier_buffer_size_kernel = (int) v; |
741 | DBG3("Number of event notifier error buffer kernel size to non default: %i", | |
742 | the_config.event_notifier_buffer_size_kernel); | |
743 | goto end; | |
744 | } else if (string_match(optname, EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR)) { | |
745 | unsigned long v; | |
746 | ||
747 | errno = 0; | |
748 | v = strtoul(arg, NULL, 0); | |
749 | if (errno != 0 || !isdigit(arg[0])) { | |
750 | ERR("Wrong value in --%s parameter: %s", | |
751 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, arg); | |
752 | return -1; | |
753 | } | |
754 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
755 | ERR("Value out of range for --%s parameter: %s", | |
756 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, arg); | |
757 | return -1; | |
758 | } | |
759 | the_config.event_notifier_buffer_size_userspace = (int) v; | |
760 | DBG3("Number of event notifier error buffer userspace size to non default: %i", | |
761 | the_config.event_notifier_buffer_size_userspace); | |
90aa04a1 | 762 | goto end; |
c0232ea5 JG |
763 | } else if (string_match(optname, "config") || opt == 'f') { |
764 | /* This is handled in set_options() thus silent skip. */ | |
765 | goto end; | |
766 | } else { | |
26296c48 JG |
767 | /* Unknown option or other error. |
768 | * Error is printed by getopt, just return */ | |
769 | ret = -1; | |
770 | } | |
771 | ||
f3dd7ce7 | 772 | end: |
c5d350b2 JG |
773 | if (ret == -EINVAL) { |
774 | const char *opt_name = "unknown"; | |
775 | int i; | |
776 | ||
777 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
778 | i++) { | |
779 | if (opt == long_options[i].val) { | |
780 | opt_name = long_options[i].name; | |
781 | break; | |
782 | } | |
783 | } | |
784 | ||
785 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
786 | opt_name); | |
787 | } | |
f3dd7ce7 | 788 | |
26296c48 JG |
789 | return ret; |
790 | } | |
791 | ||
792 | /* | |
793 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 794 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
795 | * return value conventions. |
796 | */ | |
797 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
798 | { | |
799 | int ret = 0, i; | |
800 | ||
801 | if (!entry || !entry->name || !entry->value) { | |
802 | ret = -EINVAL; | |
803 | goto end; | |
804 | } | |
805 | ||
806 | /* Check if the option is to be ignored */ | |
807 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
808 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
809 | goto end; | |
810 | } | |
811 | } | |
812 | ||
813 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
814 | i++) { | |
815 | ||
816 | /* Ignore if not fully matched. */ | |
817 | if (strcmp(entry->name, long_options[i].name)) { | |
818 | continue; | |
819 | } | |
820 | ||
821 | /* | |
822 | * If the option takes no argument on the command line, we have to | |
823 | * check if the value is "true". We support non-zero numeric values, | |
824 | * true, on and yes. | |
825 | */ | |
826 | if (!long_options[i].has_arg) { | |
827 | ret = config_parse_value(entry->value); | |
828 | if (ret <= 0) { | |
829 | if (ret) { | |
830 | WARN("Invalid configuration value \"%s\" for option %s", | |
831 | entry->value, entry->name); | |
832 | } | |
833 | /* False, skip boolean config option. */ | |
834 | goto end; | |
4d076222 | 835 | } |
26296c48 JG |
836 | } |
837 | ||
838 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
839 | goto end; | |
840 | } | |
841 | ||
842 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
843 | ||
844 | end: | |
845 | return ret; | |
846 | } | |
847 | ||
a3bc3918 JR |
848 | static void print_version(void) { |
849 | fprintf(stdout, "%s\n", VERSION); | |
850 | } | |
851 | ||
26296c48 JG |
852 | /* |
853 | * daemon configuration loading and argument parsing | |
854 | */ | |
855 | static int set_options(int argc, char **argv) | |
856 | { | |
857 | int ret = 0, c = 0, option_index = 0; | |
858 | int orig_optopt = optopt, orig_optind = optind; | |
859 | char *optstring; | |
fcf27bee | 860 | char *config_path = NULL; |
26296c48 JG |
861 | |
862 | optstring = utils_generate_optstring(long_options, | |
863 | sizeof(long_options) / sizeof(struct option)); | |
864 | if (!optstring) { | |
865 | ret = -ENOMEM; | |
866 | goto end; | |
867 | } | |
868 | ||
869 | /* Check for the --config option */ | |
870 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
871 | &option_index)) != -1) { | |
872 | if (c == '?') { | |
873 | ret = -EINVAL; | |
874 | goto end; | |
875 | } else if (c != 'f') { | |
876 | /* if not equal to --config option. */ | |
877 | continue; | |
878 | } | |
879 | ||
e8fa9fb0 MD |
880 | if (lttng_is_setuid_setgid()) { |
881 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
882 | "-f, --config"); | |
883 | } else { | |
fcf27bee | 884 | free(config_path); |
e8fa9fb0 MD |
885 | config_path = utils_expand_path(optarg); |
886 | if (!config_path) { | |
887 | ERR("Failed to resolve path: %s", optarg); | |
888 | } | |
26296c48 JG |
889 | } |
890 | } | |
891 | ||
892 | ret = config_get_section_entries(config_path, config_section_name, | |
893 | config_entry_handler, NULL); | |
894 | if (ret) { | |
895 | if (ret > 0) { | |
896 | ERR("Invalid configuration option at line %i", ret); | |
897 | ret = -1; | |
898 | } | |
899 | goto end; | |
900 | } | |
901 | ||
902 | /* Reset getopt's global state */ | |
903 | optopt = orig_optopt; | |
904 | optind = orig_optind; | |
905 | while (1) { | |
c0232ea5 JG |
906 | option_index = -1; |
907 | /* | |
908 | * getopt_long() will not set option_index if it encounters a | |
909 | * short option. | |
910 | */ | |
911 | c = getopt_long(argc, argv, optstring, long_options, | |
912 | &option_index); | |
26296c48 | 913 | if (c == -1) { |
4d076222 DG |
914 | break; |
915 | } | |
26296c48 | 916 | |
c0232ea5 JG |
917 | /* |
918 | * Pass NULL as the long option name if popt left the index | |
919 | * unset. | |
920 | */ | |
921 | ret = set_option(c, optarg, | |
922 | option_index < 0 ? NULL : | |
923 | long_options[option_index].name); | |
26296c48 JG |
924 | if (ret < 0) { |
925 | break; | |
fac6795d DG |
926 | } |
927 | } | |
928 | ||
26296c48 | 929 | end: |
fcf27bee | 930 | free(config_path); |
26296c48 JG |
931 | free(optstring); |
932 | return ret; | |
fac6795d DG |
933 | } |
934 | ||
f472090a JG |
935 | /* |
936 | * Create lockfile using the rundir and return its fd. | |
937 | */ | |
938 | static int create_lockfile(void) | |
939 | { | |
412d7227 | 940 | return utils_create_lock_file(the_config.lock_file_path.value); |
f472090a JG |
941 | } |
942 | ||
fac6795d | 943 | /* |
54d01ffb DG |
944 | * Check if the global socket is available, and if a daemon is answering at the |
945 | * other side. If yes, error is returned. | |
f472090a JG |
946 | * |
947 | * Also attempts to create and hold the lock file. | |
fac6795d | 948 | */ |
cf3af59e | 949 | static int check_existing_daemon(void) |
fac6795d | 950 | { |
f472090a JG |
951 | int ret = 0; |
952 | ||
7d8234d9 | 953 | /* Is there anybody out there ? */ |
099e26bd | 954 | if (lttng_session_daemon_alive()) { |
f472090a JG |
955 | ret = -EEXIST; |
956 | goto end; | |
099e26bd | 957 | } |
b09c7c76 | 958 | |
f472090a JG |
959 | lockfile_fd = create_lockfile(); |
960 | if (lockfile_fd < 0) { | |
961 | ret = -EEXIST; | |
962 | goto end; | |
963 | } | |
964 | end: | |
965 | return ret; | |
966 | } | |
967 | ||
968 | static void sessiond_cleanup_lock_file(void) | |
969 | { | |
970 | int ret; | |
971 | ||
972 | /* | |
973 | * Cleanup lock file by deleting it and finaly closing it which will | |
974 | * release the file system lock. | |
975 | */ | |
976 | if (lockfile_fd >= 0) { | |
412d7227 | 977 | ret = remove(the_config.lock_file_path.value); |
f472090a JG |
978 | if (ret < 0) { |
979 | PERROR("remove lock file"); | |
980 | } | |
981 | ret = close(lockfile_fd); | |
982 | if (ret < 0) { | |
983 | PERROR("close lock file"); | |
984 | } | |
985 | } | |
fac6795d DG |
986 | } |
987 | ||
fac6795d | 988 | /* |
d063d709 | 989 | * Set the tracing group gid onto the client socket. |
5e16da05 | 990 | * |
d063d709 | 991 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 992 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 993 | */ |
be040666 | 994 | static int set_permissions(char *rundir) |
fac6795d DG |
995 | { |
996 | int ret; | |
996b65c8 | 997 | gid_t gid; |
fac6795d | 998 | |
412d7227 SM |
999 | ret = utils_get_group_id( |
1000 | the_config.tracing_group_name.value, true, &gid); | |
28ab59d0 JR |
1001 | if (ret) { |
1002 | /* Default to root group. */ | |
1003 | gid = 0; | |
1004 | } | |
fac6795d | 1005 | |
d6f42150 | 1006 | /* Set lttng run dir */ |
be040666 | 1007 | ret = chown(rundir, 0, gid); |
d6f42150 | 1008 | if (ret < 0) { |
be040666 | 1009 | ERR("Unable to set group on %s", rundir); |
76d7553f | 1010 | PERROR("chown"); |
d6f42150 DG |
1011 | } |
1012 | ||
6c71277b MD |
1013 | /* |
1014 | * Ensure all applications and tracing group can search the run | |
1015 | * dir. Allow everyone to read the directory, since it does not | |
1016 | * buy us anything to hide its content. | |
1017 | */ | |
1018 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
1019 | if (ret < 0) { |
1020 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 1021 | PERROR("chmod"); |
d1613cf5 JN |
1022 | } |
1023 | ||
d6f42150 | 1024 | /* lttng client socket path */ |
412d7227 | 1025 | ret = chown(the_config.client_unix_sock_path.value, 0, gid); |
fac6795d | 1026 | if (ret < 0) { |
412d7227 SM |
1027 | ERR("Unable to set group on %s", |
1028 | the_config.client_unix_sock_path.value); | |
76d7553f | 1029 | PERROR("chown"); |
d6f42150 DG |
1030 | } |
1031 | ||
3bd1e081 | 1032 | /* kconsumer error socket path */ |
412d7227 | 1033 | ret = chown(the_kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 1034 | if (ret < 0) { |
412d7227 SM |
1035 | ERR("Unable to set group on %s", |
1036 | the_kconsumer_data.err_unix_sock_path); | |
76d7553f | 1037 | PERROR("chown"); |
3bd1e081 MD |
1038 | } |
1039 | ||
7753dea8 | 1040 | /* 64-bit ustconsumer error socket path */ |
412d7227 | 1041 | ret = chown(the_ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 | 1042 | if (ret < 0) { |
412d7227 SM |
1043 | ERR("Unable to set group on %s", |
1044 | the_ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 1045 | PERROR("chown"); |
7753dea8 MD |
1046 | } |
1047 | ||
1048 | /* 32-bit ustconsumer compat32 error socket path */ | |
412d7227 | 1049 | ret = chown(the_ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1050 | if (ret < 0) { |
412d7227 SM |
1051 | ERR("Unable to set group on %s", |
1052 | the_ustconsumer32_data.err_unix_sock_path); | |
76d7553f | 1053 | PERROR("chown"); |
fac6795d DG |
1054 | } |
1055 | ||
d6f42150 | 1056 | DBG("All permissions are set"); |
e07ae692 | 1057 | |
fac6795d DG |
1058 | return ret; |
1059 | } | |
1060 | ||
d6f42150 | 1061 | /* |
d063d709 | 1062 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1063 | */ |
e6142f2e | 1064 | static int create_lttng_rundir(void) |
d6f42150 DG |
1065 | { |
1066 | int ret; | |
1067 | ||
412d7227 | 1068 | DBG3("Creating LTTng run directory: %s", the_config.rundir.value); |
67e40797 | 1069 | |
412d7227 | 1070 | ret = mkdir(the_config.rundir.value, S_IRWXU); |
d6f42150 | 1071 | if (ret < 0) { |
b1f11e69 | 1072 | if (errno != EEXIST) { |
412d7227 | 1073 | ERR("Unable to create %s", the_config.rundir.value); |
b1f11e69 DG |
1074 | goto error; |
1075 | } else { | |
1076 | ret = 0; | |
1077 | } | |
d6f42150 DG |
1078 | } |
1079 | ||
1080 | error: | |
1081 | return ret; | |
1082 | } | |
1083 | ||
1084 | /* | |
e6142f2e | 1085 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1086 | * session daemon. |
d6f42150 | 1087 | */ |
e6142f2e | 1088 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1089 | { |
1090 | int ret; | |
e6142f2e | 1091 | char *path = NULL; |
d6f42150 | 1092 | |
6c71277b | 1093 | switch (consumer_data->type) { |
7753dea8 | 1094 | case LTTNG_CONSUMER_KERNEL: |
412d7227 | 1095 | path = the_config.kconsumerd_path.value; |
7753dea8 MD |
1096 | break; |
1097 | case LTTNG_CONSUMER64_UST: | |
412d7227 | 1098 | path = the_config.consumerd64_path.value; |
7753dea8 MD |
1099 | break; |
1100 | case LTTNG_CONSUMER32_UST: | |
412d7227 | 1101 | path = the_config.consumerd32_path.value; |
7753dea8 MD |
1102 | break; |
1103 | default: | |
1104 | ERR("Consumer type unknown"); | |
1105 | ret = -EINVAL; | |
1106 | goto error; | |
d6f42150 | 1107 | } |
e6142f2e | 1108 | assert(path); |
d6f42150 | 1109 | |
67e40797 DG |
1110 | DBG2("Creating consumer directory: %s", path); |
1111 | ||
6c71277b | 1112 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1113 | if (ret < 0 && errno != EEXIST) { |
1114 | PERROR("mkdir"); | |
1115 | ERR("Failed to create %s", path); | |
1116 | goto error; | |
d6f42150 | 1117 | } |
6c71277b | 1118 | if (is_root) { |
28ab59d0 JR |
1119 | gid_t gid; |
1120 | ||
412d7227 SM |
1121 | ret = utils_get_group_id(the_config.tracing_group_name.value, |
1122 | true, &gid); | |
28ab59d0 JR |
1123 | if (ret) { |
1124 | /* Default to root group. */ | |
1125 | gid = 0; | |
1126 | } | |
1127 | ||
1128 | ret = chown(path, 0, gid); | |
6c71277b MD |
1129 | if (ret < 0) { |
1130 | ERR("Unable to set group on %s", path); | |
1131 | PERROR("chown"); | |
1132 | goto error; | |
1133 | } | |
1134 | } | |
d6f42150 | 1135 | |
e6142f2e | 1136 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1137 | consumer_data->err_sock = |
1138 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1139 | if (consumer_data->err_sock < 0) { | |
1140 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1141 | ret = -1; |
1142 | goto error; | |
1143 | } | |
1144 | ||
a24f05ab MD |
1145 | /* |
1146 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1147 | * show must go on. | |
1148 | */ | |
1149 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1150 | if (ret < 0) { | |
1151 | PERROR("utils_set_fd_cloexec"); | |
1152 | /* continue anyway */ | |
1153 | } | |
1154 | ||
d6f42150 | 1155 | /* File permission MUST be 660 */ |
3bd1e081 | 1156 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 1157 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1158 | if (ret < 0) { |
3bd1e081 | 1159 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1160 | PERROR("chmod"); |
d6f42150 DG |
1161 | goto error; |
1162 | } | |
1163 | ||
1164 | error: | |
1165 | return ret; | |
1166 | } | |
1167 | ||
fac6795d | 1168 | /* |
d063d709 | 1169 | * Signal handler for the daemon |
cf3af59e | 1170 | * |
54d01ffb DG |
1171 | * Simply stop all worker threads, leaving main() return gracefully after |
1172 | * joining all threads and calling cleanup(). | |
fac6795d | 1173 | */ |
881fc67f | 1174 | static void sighandler(int sig, siginfo_t *siginfo, void *arg) |
fac6795d DG |
1175 | { |
1176 | switch (sig) { | |
cf3af59e | 1177 | case SIGINT: |
af87c45a | 1178 | DBG("SIGINT caught"); |
cf3af59e MD |
1179 | stop_threads(); |
1180 | break; | |
1181 | case SIGTERM: | |
af87c45a | 1182 | DBG("SIGTERM caught"); |
cf3af59e MD |
1183 | stop_threads(); |
1184 | break; | |
0bb7724a DG |
1185 | case SIGUSR1: |
1186 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1187 | break; | |
881fc67f MD |
1188 | case SIGBUS: |
1189 | { | |
1190 | int write_ret; | |
1191 | const char msg[] = "Received SIGBUS, aborting program.\n"; | |
1192 | ||
1193 | lttng_ust_handle_sigbus(siginfo->si_addr); | |
1194 | /* | |
1195 | * If ustctl did not catch this signal (triggering a | |
1196 | * siglongjmp), abort the program. Otherwise, the execution | |
1197 | * will resume from the ust-ctl call which caused this error. | |
1198 | * | |
1199 | * The return value is ignored since the program aborts anyhow. | |
1200 | */ | |
1201 | write_ret = write(STDERR_FILENO, msg, sizeof(msg)); | |
1202 | (void) write_ret; | |
1203 | abort(); | |
1204 | } | |
cf3af59e MD |
1205 | default: |
1206 | break; | |
fac6795d | 1207 | } |
fac6795d DG |
1208 | } |
1209 | ||
1210 | /* | |
d063d709 | 1211 | * Setup signal handler for : |
1d4b027a | 1212 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1213 | */ |
1d4b027a | 1214 | static int set_signal_handler(void) |
fac6795d | 1215 | { |
1d4b027a DG |
1216 | int ret = 0; |
1217 | struct sigaction sa; | |
1218 | sigset_t sigset; | |
fac6795d | 1219 | |
1d4b027a | 1220 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1221 | PERROR("sigemptyset"); |
1d4b027a DG |
1222 | return ret; |
1223 | } | |
d6f42150 | 1224 | |
1d4b027a | 1225 | sa.sa_mask = sigset; |
881fc67f | 1226 | sa.sa_flags = SA_SIGINFO; |
0072e5e2 | 1227 | |
881fc67f | 1228 | sa.sa_sigaction = sighandler; |
1d4b027a | 1229 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 1230 | PERROR("sigaction"); |
1d4b027a | 1231 | return ret; |
d6f42150 DG |
1232 | } |
1233 | ||
1d4b027a | 1234 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 1235 | PERROR("sigaction"); |
1d4b027a | 1236 | return ret; |
d6f42150 | 1237 | } |
aaf26714 | 1238 | |
0072e5e2 | 1239 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 1240 | PERROR("sigaction"); |
1d4b027a | 1241 | return ret; |
8c0faa1d DG |
1242 | } |
1243 | ||
881fc67f MD |
1244 | if ((ret = sigaction(SIGBUS, &sa, NULL)) < 0) { |
1245 | PERROR("sigaction"); | |
1246 | return ret; | |
1247 | } | |
1248 | ||
1249 | sa.sa_flags = 0; | |
0072e5e2 MD |
1250 | sa.sa_handler = SIG_IGN; |
1251 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
1252 | PERROR("sigaction"); |
1253 | return ret; | |
1254 | } | |
1255 | ||
881fc67f | 1256 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE, SIGINT, and SIGBUS"); |
1d4b027a DG |
1257 | |
1258 | return ret; | |
fac6795d DG |
1259 | } |
1260 | ||
f3ed775e | 1261 | /* |
d063d709 | 1262 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1263 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
1264 | */ |
1265 | static void set_ulimit(void) | |
1266 | { | |
1267 | int ret; | |
1268 | struct rlimit lim; | |
1269 | ||
514bb9f0 | 1270 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1271 | lim.rlim_cur = 65535; |
1272 | lim.rlim_max = 65535; | |
1273 | ||
1274 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1275 | if (ret < 0) { | |
76d7553f | 1276 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1277 | } |
1278 | } | |
1279 | ||
4a15001e | 1280 | static int write_pidfile(void) |
35f90c40 | 1281 | { |
412d7227 | 1282 | return utils_create_pid_file(getpid(), the_config.pid_file_path.value); |
35f90c40 DG |
1283 | } |
1284 | ||
e6142f2e JG |
1285 | static int set_clock_plugin_env(void) |
1286 | { | |
1287 | int ret = 0; | |
1288 | char *env_value = NULL; | |
cd9290dd | 1289 | |
412d7227 | 1290 | if (!the_config.lttng_ust_clock_plugin.value) { |
e6142f2e JG |
1291 | goto end; |
1292 | } | |
1293 | ||
3cfcd698 | 1294 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", |
412d7227 | 1295 | the_config.lttng_ust_clock_plugin.value); |
cd9290dd | 1296 | if (ret < 0) { |
e6142f2e JG |
1297 | PERROR("asprintf"); |
1298 | goto end; | |
cd9290dd DG |
1299 | } |
1300 | ||
e6142f2e JG |
1301 | ret = putenv(env_value); |
1302 | if (ret) { | |
1303 | free(env_value); | |
1304 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1305 | goto end; | |
1306 | } | |
cd9290dd | 1307 | |
e6142f2e | 1308 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
412d7227 | 1309 | the_config.lttng_ust_clock_plugin.value); |
e6142f2e | 1310 | end: |
4a15001e | 1311 | return ret; |
ef367a93 JG |
1312 | } |
1313 | ||
99d688f2 JG |
1314 | static void destroy_all_sessions_and_wait(void) |
1315 | { | |
1316 | struct ltt_session *session, *tmp; | |
1317 | struct ltt_session_list *session_list; | |
1318 | ||
1319 | session_list = session_get_list(); | |
1320 | DBG("Initiating destruction of all sessions"); | |
1321 | ||
1322 | if (!session_list) { | |
1323 | return; | |
1324 | } | |
1325 | ||
99d688f2 JG |
1326 | session_lock_list(); |
1327 | /* Initiate the destruction of all sessions. */ | |
1328 | cds_list_for_each_entry_safe(session, tmp, | |
1329 | &session_list->head, list) { | |
1330 | if (!session_get(session)) { | |
1331 | continue; | |
1332 | } | |
1333 | ||
1334 | session_lock(session); | |
1335 | if (session->destroyed) { | |
1336 | goto unlock_session; | |
1337 | } | |
63763958 | 1338 | (void) cmd_stop_trace(session); |
412d7227 SM |
1339 | (void) cmd_destroy_session( |
1340 | session, the_notification_thread_handle, NULL); | |
99d688f2 JG |
1341 | unlock_session: |
1342 | session_unlock(session); | |
1343 | session_put(session); | |
1344 | } | |
1345 | session_unlock_list(); | |
1346 | ||
1347 | /* Wait for the destruction of all sessions to complete. */ | |
1348 | DBG("Waiting for the destruction of all sessions to complete"); | |
1349 | session_list_wait_empty(); | |
1350 | DBG("Destruction of all sessions completed"); | |
1351 | } | |
1352 | ||
b69a1b40 JG |
1353 | static void unregister_all_triggers(void) |
1354 | { | |
1355 | enum lttng_error_code ret_code; | |
1356 | enum lttng_trigger_status trigger_status; | |
1357 | struct lttng_triggers *triggers = NULL; | |
1358 | unsigned int trigger_count, i; | |
1359 | const struct lttng_credentials creds = { | |
e534f206 | 1360 | .uid = LTTNG_OPTIONAL_INIT_VALUE(0), |
b69a1b40 JG |
1361 | }; |
1362 | ||
1363 | DBG("Unregistering all triggers"); | |
1364 | ||
1365 | /* | |
1366 | * List all triggers as "root" since we wish to unregister all triggers. | |
1367 | */ | |
1368 | ret_code = notification_thread_command_list_triggers( | |
412d7227 SM |
1369 | the_notification_thread_handle, creds.uid.value, |
1370 | &triggers); | |
b69a1b40 JG |
1371 | if (ret_code != LTTNG_OK) { |
1372 | ERR("Failed to list triggers while unregistering all triggers"); | |
1373 | goto end; | |
1374 | } | |
1375 | ||
1376 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
1377 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1378 | ||
1379 | for (i = 0; i < trigger_count; i++) { | |
b69a1b40 JG |
1380 | uid_t trigger_owner; |
1381 | const char *trigger_name; | |
1382 | const struct lttng_trigger *trigger = | |
1383 | lttng_triggers_get_at_index(triggers, i); | |
1384 | ||
1385 | assert(trigger); | |
1386 | ||
1387 | trigger_status = lttng_trigger_get_owner_uid( | |
1388 | trigger, &trigger_owner); | |
1389 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1390 | ||
1391 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
0efb2ad7 JG |
1392 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? |
1393 | trigger_name : "(anonymous)"; | |
b69a1b40 JG |
1394 | |
1395 | DBG("Unregistering trigger: trigger owner uid = %d, trigger name = '%s'", | |
1396 | (int) trigger_owner, trigger_name); | |
1397 | ||
412d7227 SM |
1398 | ret_code = cmd_unregister_trigger(&creds, trigger, |
1399 | the_notification_thread_handle); | |
b69a1b40 JG |
1400 | if (ret_code != LTTNG_OK) { |
1401 | ERR("Failed to unregister trigger: trigger owner uid = %d, trigger name = '%s', error: '%s'", | |
1402 | (int) trigger_owner, trigger_name, | |
1403 | lttng_strerror(-ret_code)); | |
1404 | /* Continue to unregister the remaining triggers. */ | |
1405 | } | |
1406 | } | |
1407 | end: | |
1408 | lttng_triggers_destroy(triggers); | |
1409 | } | |
1410 | ||
929f71ec JG |
1411 | static int run_as_worker_post_fork_cleanup(void *data) |
1412 | { | |
1413 | struct sessiond_config *sessiond_config = data; | |
1414 | ||
1415 | sessiond_config_fini(sessiond_config); | |
1416 | return 0; | |
1417 | } | |
1418 | ||
1419 | static int launch_run_as_worker(const char *procname) | |
1420 | { | |
1421 | /* | |
1422 | * Clean-up before forking the run-as worker. Any dynamically | |
1423 | * allocated memory of which the worker is not aware will | |
1424 | * be leaked as the process forks a run-as worker (and performs | |
1425 | * no exec*()). The same would apply to any opened fd. | |
1426 | */ | |
412d7227 SM |
1427 | return run_as_create_worker( |
1428 | procname, run_as_worker_post_fork_cleanup, &the_config); | |
929f71ec JG |
1429 | } |
1430 | ||
52a0e931 JG |
1431 | static void sessiond_uuid_log(void) |
1432 | { | |
c70636a7 | 1433 | char uuid_str[LTTNG_UUID_STR_LEN]; |
52a0e931 | 1434 | |
412d7227 | 1435 | lttng_uuid_to_str(the_sessiond_uuid, uuid_str); |
52a0e931 JG |
1436 | DBG("Starting lttng-sessiond {%s}", uuid_str); |
1437 | } | |
1438 | ||
fac6795d DG |
1439 | /* |
1440 | * main | |
1441 | */ | |
1442 | int main(int argc, char **argv) | |
1443 | { | |
4a15001e | 1444 | int ret = 0, retval = 0; |
e6142f2e | 1445 | const char *env_app_timeout; |
b3530820 JG |
1446 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
1447 | *ust64_channel_monitor_pipe = NULL, | |
1448 | *kernel_channel_monitor_pipe = NULL; | |
a3707772 | 1449 | struct lttng_thread *ht_cleanup_thread = NULL; |
bc26e826 | 1450 | struct timer_thread_parameters timer_thread_parameters; |
64d9b072 JG |
1451 | /* Rotation thread handle. */ |
1452 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
1453 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
1454 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
917a718d | 1455 | struct lttng_thread *client_thread = NULL; |
4a91420c | 1456 | struct lttng_thread *notification_thread = NULL; |
bd9addf7 | 1457 | struct lttng_thread *register_apps_thread = NULL; |
761ffce2 | 1458 | enum event_notifier_error_accounting_status event_notifier_error_accounting_status; |
fac6795d | 1459 | |
f5fb86c1 | 1460 | logger_set_thread_name("Main", false); |
335a95b7 MD |
1461 | init_kernel_workarounds(); |
1462 | ||
f6a9efaa DG |
1463 | rcu_register_thread(); |
1464 | ||
4a15001e MD |
1465 | if (set_signal_handler()) { |
1466 | retval = -1; | |
1467 | goto exit_set_signal_handler; | |
0bb7724a DG |
1468 | } |
1469 | ||
92816cc3 | 1470 | if (timer_signal_init()) { |
d086f507 JD |
1471 | retval = -1; |
1472 | goto exit_set_signal_handler; | |
1473 | } | |
1474 | ||
412d7227 SM |
1475 | the_page_size = sysconf(_SC_PAGESIZE); |
1476 | if (the_page_size < 0) { | |
12744796 | 1477 | PERROR("sysconf _SC_PAGESIZE"); |
412d7227 SM |
1478 | the_page_size = LONG_MAX; |
1479 | WARN("Fallback page size to %ld", the_page_size); | |
12744796 DG |
1480 | } |
1481 | ||
412d7227 | 1482 | ret = sessiond_config_init(&the_config); |
e6142f2e JG |
1483 | if (ret) { |
1484 | retval = -1; | |
1485 | goto exit_set_signal_handler; | |
1486 | } | |
1487 | ||
2788b494 JR |
1488 | /* |
1489 | * Init config from environment variables. | |
1490 | * Command line option override env configuration per-doc. Do env first. | |
1491 | */ | |
412d7227 | 1492 | sessiond_config_apply_env_config(&the_config); |
2788b494 | 1493 | |
4a15001e MD |
1494 | /* |
1495 | * Parse arguments and load the daemon configuration file. | |
1496 | * | |
1497 | * We have an exit_options exit path to free memory reserved by | |
1498 | * set_options. This is needed because the rest of sessiond_cleanup() | |
1499 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
1500 | * depends on set_options. | |
1501 | */ | |
fac6795d | 1502 | progname = argv[0]; |
4a15001e MD |
1503 | if (set_options(argc, argv)) { |
1504 | retval = -1; | |
1505 | goto exit_options; | |
fac6795d DG |
1506 | } |
1507 | ||
e6142f2e JG |
1508 | /* |
1509 | * Resolve all paths received as arguments, configuration option, or | |
1510 | * through environment variable as absolute paths. This is necessary | |
1511 | * since daemonizing causes the sessiond's current working directory | |
1512 | * to '/'. | |
1513 | */ | |
412d7227 | 1514 | ret = sessiond_config_resolve_paths(&the_config); |
e6142f2e JG |
1515 | if (ret) { |
1516 | goto exit_options; | |
1517 | } | |
1518 | ||
1519 | /* Apply config. */ | |
412d7227 SM |
1520 | lttng_opt_verbose = the_config.verbose; |
1521 | lttng_opt_quiet = the_config.quiet; | |
1522 | the_kconsumer_data.err_unix_sock_path = | |
1523 | the_config.kconsumerd_err_unix_sock_path.value; | |
1524 | the_kconsumer_data.cmd_unix_sock_path = | |
1525 | the_config.kconsumerd_cmd_unix_sock_path.value; | |
1526 | the_ustconsumer32_data.err_unix_sock_path = | |
1527 | the_config.consumerd32_err_unix_sock_path.value; | |
1528 | the_ustconsumer32_data.cmd_unix_sock_path = | |
1529 | the_config.consumerd32_cmd_unix_sock_path.value; | |
1530 | the_ustconsumer64_data.err_unix_sock_path = | |
1531 | the_config.consumerd64_err_unix_sock_path.value; | |
1532 | the_ustconsumer64_data.cmd_unix_sock_path = | |
1533 | the_config.consumerd64_cmd_unix_sock_path.value; | |
e6142f2e JG |
1534 | set_clock_plugin_env(); |
1535 | ||
412d7227 | 1536 | sessiond_config_log(&the_config); |
52a0e931 | 1537 | sessiond_uuid_log(); |
e6142f2e | 1538 | |
a3bc3918 JR |
1539 | if (opt_print_version) { |
1540 | print_version(); | |
1541 | retval = 0; | |
1542 | goto exit_options; | |
1543 | } | |
1544 | ||
f472090a JG |
1545 | if (create_lttng_rundir()) { |
1546 | retval = -1; | |
1547 | goto exit_options; | |
1548 | } | |
1549 | ||
1550 | /* Abort launch if a session daemon is already running. */ | |
1551 | if (check_existing_daemon()) { | |
1552 | ERR("A session daemon is already running."); | |
1553 | retval = -1; | |
1554 | goto exit_options; | |
1555 | } | |
1556 | ||
fac6795d | 1557 | /* Daemonize */ |
412d7227 | 1558 | if (the_config.daemonize || the_config.background) { |
ceed52b5 MD |
1559 | int i; |
1560 | ||
412d7227 SM |
1561 | ret = lttng_daemonize(&the_child_ppid, &recv_child_signal, |
1562 | !the_config.background); | |
53094c05 | 1563 | if (ret < 0) { |
4a15001e MD |
1564 | retval = -1; |
1565 | goto exit_options; | |
53094c05 | 1566 | } |
0bb7724a | 1567 | |
ceed52b5 | 1568 | /* |
0bb7724a | 1569 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 1570 | * closed, in case we are called with more opened file |
f472090a | 1571 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
1572 | */ |
1573 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
1574 | if (i == lockfile_fd) { |
1575 | continue; | |
1576 | } | |
ceed52b5 MD |
1577 | (void) close(i); |
1578 | } | |
1579 | } | |
1580 | ||
929f71ec | 1581 | if (launch_run_as_worker(argv[0]) < 0) { |
7567352f MD |
1582 | goto exit_create_run_as_worker_cleanup; |
1583 | } | |
1584 | ||
4a15001e MD |
1585 | /* |
1586 | * Starting from here, we can create threads. This needs to be after | |
1587 | * lttng_daemonize due to RCU. | |
1588 | */ | |
1589 | ||
1590 | /* | |
1591 | * Initialize the health check subsystem. This call should set the | |
1592 | * appropriate time values. | |
1593 | */ | |
412d7227 SM |
1594 | the_health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
1595 | if (!the_health_sessiond) { | |
4a15001e MD |
1596 | PERROR("health_app_create error"); |
1597 | retval = -1; | |
0d64e8fb | 1598 | goto stop_threads; |
4a15001e MD |
1599 | } |
1600 | ||
4a15001e | 1601 | /* Create thread to clean up RCU hash tables */ |
a3707772 JG |
1602 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
1603 | if (!ht_cleanup_thread) { | |
4a15001e | 1604 | retval = -1; |
0d64e8fb | 1605 | goto stop_threads; |
4a15001e MD |
1606 | } |
1607 | ||
ceed52b5 | 1608 | /* Create thread quit pipe */ |
a7333da7 | 1609 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e | 1610 | retval = -1; |
0d64e8fb | 1611 | goto stop_threads; |
fac6795d DG |
1612 | } |
1613 | ||
1614 | /* Check if daemon is UID = 0 */ | |
1615 | is_root = !getuid(); | |
fac6795d | 1616 | if (is_root) { |
67e40797 | 1617 | /* Create global run dir with root access */ |
67e40797 | 1618 | |
b3530820 JG |
1619 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
1620 | if (!kernel_channel_monitor_pipe) { | |
1621 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
1622 | retval = -1; | |
0d64e8fb | 1623 | goto stop_threads; |
b3530820 | 1624 | } |
412d7227 | 1625 | the_kconsumer_data.channel_monitor_pipe = |
b3530820 | 1626 | lttng_pipe_release_writefd( |
412d7227 SM |
1627 | kernel_channel_monitor_pipe); |
1628 | if (the_kconsumer_data.channel_monitor_pipe < 0) { | |
b3530820 | 1629 | retval = -1; |
0d64e8fb | 1630 | goto stop_threads; |
b3530820 | 1631 | } |
fac6795d DG |
1632 | } |
1633 | ||
5c827ce0 | 1634 | /* Set consumer initial state */ |
412d7227 SM |
1635 | the_kernel_consumerd_state = CONSUMER_STOPPED; |
1636 | the_ust_consumerd_state = CONSUMER_STOPPED; | |
5c827ce0 | 1637 | |
b3530820 JG |
1638 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
1639 | if (!ust32_channel_monitor_pipe) { | |
1640 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
1641 | retval = -1; | |
0d64e8fb | 1642 | goto stop_threads; |
b3530820 | 1643 | } |
412d7227 SM |
1644 | the_ustconsumer32_data.channel_monitor_pipe = |
1645 | lttng_pipe_release_writefd(ust32_channel_monitor_pipe); | |
1646 | if (the_ustconsumer32_data.channel_monitor_pipe < 0) { | |
b3530820 | 1647 | retval = -1; |
0d64e8fb | 1648 | goto stop_threads; |
b3530820 | 1649 | } |
62c43103 | 1650 | |
d086f507 | 1651 | /* |
92816cc3 JG |
1652 | * The rotation_thread_timer_queue structure is shared between the |
1653 | * sessiond timer thread and the rotation thread. The main thread keeps | |
1654 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 1655 | */ |
92816cc3 | 1656 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
1657 | if (!rotation_timer_queue) { |
1658 | retval = -1; | |
0d64e8fb | 1659 | goto stop_threads; |
d086f507 | 1660 | } |
bc26e826 JG |
1661 | timer_thread_parameters.rotation_thread_job_queue = |
1662 | rotation_timer_queue; | |
67e40797 | 1663 | |
b3530820 JG |
1664 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
1665 | if (!ust64_channel_monitor_pipe) { | |
1666 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
1667 | retval = -1; | |
0d64e8fb | 1668 | goto stop_threads; |
b3530820 | 1669 | } |
412d7227 SM |
1670 | the_ustconsumer64_data.channel_monitor_pipe = |
1671 | lttng_pipe_release_writefd(ust64_channel_monitor_pipe); | |
1672 | if (the_ustconsumer64_data.channel_monitor_pipe < 0) { | |
b3530820 | 1673 | retval = -1; |
0d64e8fb | 1674 | goto stop_threads; |
b3530820 | 1675 | } |
847177cd | 1676 | |
1427f9b2 DG |
1677 | /* |
1678 | * Init UST app hash table. Alloc hash table before this point since | |
1679 | * cleanup() can get called after that point. | |
1680 | */ | |
4a15001e | 1681 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 1682 | ERR("Failed to allocate UST app hash table"); |
4a15001e | 1683 | retval = -1; |
0d64e8fb | 1684 | goto stop_threads; |
4a15001e | 1685 | } |
1427f9b2 | 1686 | |
761ffce2 FD |
1687 | event_notifier_error_accounting_status = event_notifier_error_accounting_init( |
1688 | the_config.event_notifier_buffer_size_kernel, | |
1689 | the_config.event_notifier_buffer_size_userspace); | |
1690 | if (event_notifier_error_accounting_status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
1691 | ERR("Failed to initialize event notifier error accounting system"); | |
1692 | retval = -1; | |
1693 | goto stop_threads; | |
1694 | } | |
90aa04a1 | 1695 | |
6a4e4039 JG |
1696 | /* |
1697 | * Initialize agent app hash table. We allocate the hash table here | |
1698 | * since cleanup() can get called after this point. | |
1699 | */ | |
1700 | if (agent_app_ht_alloc()) { | |
1701 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e | 1702 | retval = -1; |
0d64e8fb | 1703 | goto stop_threads; |
f20baf8e DG |
1704 | } |
1705 | ||
44760c20 JR |
1706 | if (agent_by_event_notifier_domain_ht_create()) { |
1707 | ERR("Failed to allocate per-event notifier domain agent hash table"); | |
1708 | retval = -1; | |
1709 | goto stop_threads; | |
1710 | } | |
a88df331 DG |
1711 | /* |
1712 | * These actions must be executed as root. We do that *after* setting up | |
1713 | * the sockets path because we MUST make the check for another daemon using | |
1714 | * those paths *before* trying to set the kernel consumer sockets and init | |
1715 | * kernel tracer. | |
1716 | */ | |
1717 | if (is_root) { | |
412d7227 | 1718 | if (set_consumer_sockets(&the_kconsumer_data)) { |
4a15001e | 1719 | retval = -1; |
0d64e8fb | 1720 | goto stop_threads; |
7753dea8 MD |
1721 | } |
1722 | ||
a88df331 | 1723 | /* Setup kernel tracer */ |
412d7227 | 1724 | if (!the_config.no_kernel) { |
4fba7219 DG |
1725 | init_kernel_tracer(); |
1726 | } | |
a88df331 DG |
1727 | |
1728 | /* Set ulimit for open files */ | |
1729 | set_ulimit(); | |
fac6795d | 1730 | } |
4063050c MD |
1731 | /* init lttng_fd tracking must be done after set_ulimit. */ |
1732 | lttng_fd_init(); | |
fac6795d | 1733 | |
412d7227 | 1734 | if (set_consumer_sockets(&the_ustconsumer64_data)) { |
4a15001e | 1735 | retval = -1; |
0d64e8fb | 1736 | goto stop_threads; |
67e40797 DG |
1737 | } |
1738 | ||
412d7227 | 1739 | if (set_consumer_sockets(&the_ustconsumer32_data)) { |
4a15001e | 1740 | retval = -1; |
0d64e8fb | 1741 | goto stop_threads; |
67e40797 DG |
1742 | } |
1743 | ||
5b8719f5 | 1744 | /* Get parent pid if -S, --sig-parent is specified. */ |
412d7227 SM |
1745 | if (the_config.sig_parent) { |
1746 | the_ppid = getppid(); | |
5b8719f5 DG |
1747 | } |
1748 | ||
7a485870 | 1749 | /* Setup the kernel pipe for waking up the kernel thread */ |
412d7227 SM |
1750 | if (is_root && !the_config.no_kernel) { |
1751 | if (utils_create_pipe_cloexec(the_kernel_poll_pipe)) { | |
4a15001e | 1752 | retval = -1; |
0d64e8fb | 1753 | goto stop_threads; |
6620da75 | 1754 | } |
7a485870 DG |
1755 | } |
1756 | ||
099e26bd | 1757 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
1758 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
1759 | retval = -1; | |
0d64e8fb | 1760 | goto stop_threads; |
099e26bd DG |
1761 | } |
1762 | ||
d0b96690 | 1763 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
1764 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
1765 | retval = -1; | |
0d64e8fb | 1766 | goto stop_threads; |
d0b96690 DG |
1767 | } |
1768 | ||
7972aab2 DG |
1769 | /* Initialize global buffer per UID and PID registry. */ |
1770 | buffer_reg_init_uid_registry(); | |
1771 | buffer_reg_init_pid_registry(); | |
1772 | ||
099e26bd | 1773 | /* Init UST command queue. */ |
8bdee6e2 | 1774 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1775 | |
2f77fc4b | 1776 | cmd_init(); |
00e2e675 | 1777 | |
ae9e45b3 DG |
1778 | /* Check for the application socket timeout env variable. */ |
1779 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
1780 | if (env_app_timeout) { | |
412d7227 | 1781 | the_config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 1782 | } else { |
412d7227 | 1783 | the_config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
1784 | } |
1785 | ||
4a15001e MD |
1786 | ret = write_pidfile(); |
1787 | if (ret) { | |
1788 | ERR("Error in write_pidfile"); | |
1789 | retval = -1; | |
0d64e8fb | 1790 | goto stop_threads; |
4a15001e | 1791 | } |
35f90c40 | 1792 | |
554831e7 MD |
1793 | /* Initialize communication library */ |
1794 | lttcomm_init(); | |
4a15001e | 1795 | /* Initialize TCP timeout values */ |
d831c249 | 1796 | lttcomm_inet_init(); |
554831e7 | 1797 | |
12b4fb37 | 1798 | /* Create health-check thread. */ |
173fca4f | 1799 | if (!launch_health_management_thread()) { |
4a15001e | 1800 | retval = -1; |
0d64e8fb | 1801 | goto stop_threads; |
44a5e5eb DG |
1802 | } |
1803 | ||
b3530820 | 1804 | /* notification_thread_data acquires the pipes' read side. */ |
412d7227 SM |
1805 | the_notification_thread_handle = notification_thread_handle_create( |
1806 | ust32_channel_monitor_pipe, ust64_channel_monitor_pipe, | |
c8a9de5a | 1807 | kernel_channel_monitor_pipe); |
412d7227 | 1808 | if (!the_notification_thread_handle) { |
b3530820 JG |
1809 | retval = -1; |
1810 | ERR("Failed to create notification thread shared data"); | |
0d64e8fb | 1811 | goto stop_threads; |
b3530820 JG |
1812 | } |
1813 | ||
1814 | /* Create notification thread. */ | |
4a91420c | 1815 | notification_thread = launch_notification_thread( |
412d7227 | 1816 | the_notification_thread_handle); |
4a91420c | 1817 | if (!notification_thread) { |
b3530820 | 1818 | retval = -1; |
0d64e8fb | 1819 | goto stop_threads; |
b3530820 JG |
1820 | } |
1821 | ||
d086f507 | 1822 | /* Create timer thread. */ |
bc26e826 | 1823 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 1824 | retval = -1; |
0d64e8fb | 1825 | goto stop_threads; |
d086f507 | 1826 | } |
d086f507 | 1827 | |
db66e574 JD |
1828 | /* rotation_thread_data acquires the pipes' read side. */ |
1829 | rotation_thread_handle = rotation_thread_handle_create( | |
412d7227 | 1830 | rotation_timer_queue, the_notification_thread_handle); |
db66e574 JD |
1831 | if (!rotation_thread_handle) { |
1832 | retval = -1; | |
1833 | ERR("Failed to create rotation thread shared data"); | |
1834 | stop_threads(); | |
0d64e8fb | 1835 | goto stop_threads; |
db66e574 | 1836 | } |
db66e574 JD |
1837 | |
1838 | /* Create rotation thread. */ | |
64d9b072 | 1839 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 1840 | retval = -1; |
0d64e8fb | 1841 | goto stop_threads; |
db66e574 JD |
1842 | } |
1843 | ||
cf3af59e | 1844 | /* Create thread to manage the client socket */ |
917a718d JG |
1845 | client_thread = launch_client_thread(); |
1846 | if (!client_thread) { | |
4a15001e | 1847 | retval = -1; |
0d64e8fb | 1848 | goto stop_threads; |
cf3af59e | 1849 | } |
fac6795d | 1850 | |
308df7bb | 1851 | /* Set credentials of the client socket and rundir */ |
412d7227 | 1852 | if (is_root && set_permissions(the_config.rundir.value)) { |
308df7bb JG |
1853 | retval = -1; |
1854 | goto stop_threads; | |
1855 | } | |
1856 | ||
5d1b0219 JG |
1857 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], |
1858 | apps_cmd_notify_pipe[1])) { | |
4a15001e | 1859 | retval = -1; |
0d64e8fb | 1860 | goto stop_threads; |
099e26bd DG |
1861 | } |
1862 | ||
1863 | /* Create thread to manage application registration. */ | |
bd9addf7 JG |
1864 | register_apps_thread = launch_application_registration_thread( |
1865 | &ust_cmd_queue); | |
1866 | if (!register_apps_thread) { | |
4a15001e | 1867 | retval = -1; |
0d64e8fb | 1868 | goto stop_threads; |
099e26bd DG |
1869 | } |
1870 | ||
cf3af59e | 1871 | /* Create thread to manage application socket */ |
7649924e | 1872 | if (!launch_application_management_thread(apps_cmd_pipe[0])) { |
4a15001e | 1873 | retval = -1; |
0d64e8fb | 1874 | goto stop_threads; |
d0b96690 DG |
1875 | } |
1876 | ||
1877 | /* Create thread to manage application notify socket */ | |
971a61c6 | 1878 | if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) { |
4a15001e | 1879 | retval = -1; |
0d64e8fb | 1880 | goto stop_threads; |
cf3af59e | 1881 | } |
fac6795d | 1882 | |
8a7e4590 JG |
1883 | /* Create agent management thread. */ |
1884 | if (!launch_agent_management_thread()) { | |
4a15001e | 1885 | retval = -1; |
0d64e8fb | 1886 | goto stop_threads; |
4d076222 DG |
1887 | } |
1888 | ||
6620da75 | 1889 | /* Don't start this thread if kernel tracing is not requested nor root */ |
412d7227 | 1890 | if (is_root && !the_config.no_kernel) { |
6620da75 | 1891 | /* Create kernel thread to manage kernel event */ |
412d7227 | 1892 | if (!launch_kernel_management_thread(the_kernel_poll_pipe[0])) { |
4a15001e | 1893 | retval = -1; |
0d64e8fb | 1894 | goto stop_threads; |
6620da75 | 1895 | } |
352b58f5 JR |
1896 | |
1897 | if (kernel_get_notification_fd() >= 0) { | |
1898 | ret = notification_thread_command_add_tracer_event_source( | |
412d7227 | 1899 | the_notification_thread_handle, |
352b58f5 JR |
1900 | kernel_get_notification_fd(), |
1901 | LTTNG_DOMAIN_KERNEL); | |
1902 | if (ret != LTTNG_OK) { | |
1903 | ERR("Failed to add kernel trigger event source to notification thread"); | |
1904 | retval = -1; | |
1905 | goto stop_threads; | |
1906 | } | |
1907 | } | |
ef367a93 | 1908 | } |
7a485870 | 1909 | |
3316b9d6 | 1910 | /* Load sessions. */ |
412d7227 SM |
1911 | ret = config_load_session( |
1912 | the_config.load_session_path.value, NULL, 1, 1, NULL); | |
4a15001e | 1913 | if (ret) { |
3316b9d6 | 1914 | ERR("Session load failed: %s", error_get_str(ret)); |
4a15001e | 1915 | retval = -1; |
0d64e8fb | 1916 | goto stop_threads; |
4a15001e MD |
1917 | } |
1918 | ||
3316b9d6 JG |
1919 | /* Initialization completed. */ |
1920 | sessiond_signal_parents(); | |
1921 | ||
4a15001e MD |
1922 | /* |
1923 | * This is where we start awaiting program completion (e.g. through | |
1924 | * signal that asks threads to teardown). | |
1925 | */ | |
1926 | ||
99d688f2 | 1927 | /* Initiate teardown once activity occurs on the quit pipe. */ |
2d54bfb6 | 1928 | sessiond_wait_for_quit_pipe(-1); |
917a718d | 1929 | |
0d64e8fb | 1930 | stop_threads: |
90aa04a1 | 1931 | |
917a718d JG |
1932 | /* |
1933 | * Ensure that the client thread is no longer accepting new commands, | |
1934 | * which could cause new sessions to be created. | |
1935 | */ | |
0d64e8fb JG |
1936 | if (client_thread) { |
1937 | lttng_thread_shutdown(client_thread); | |
917a718d | 1938 | lttng_thread_put(client_thread); |
917a718d JG |
1939 | } |
1940 | ||
99d688f2 | 1941 | destroy_all_sessions_and_wait(); |
0d64e8fb | 1942 | |
b69a1b40 JG |
1943 | /* |
1944 | * At this point no new trigger can be registered (no sessions are | |
1945 | * running/rotating) and clients can't connect to the session daemon | |
1946 | * anymore. Unregister all triggers. | |
1947 | */ | |
1948 | unregister_all_triggers(); | |
1949 | ||
bd9addf7 JG |
1950 | if (register_apps_thread) { |
1951 | lttng_thread_shutdown(register_apps_thread); | |
1952 | lttng_thread_put(register_apps_thread); | |
1953 | } | |
a3707772 | 1954 | lttng_thread_list_shutdown_orphans(); |
917a718d | 1955 | |
4d62fbf8 MD |
1956 | /* |
1957 | * Wait for all pending call_rcu work to complete before tearing | |
1958 | * down data structures. call_rcu worker may be trying to | |
1959 | * perform lookups in those structures. | |
1960 | */ | |
1961 | rcu_barrier(); | |
4a15001e MD |
1962 | /* |
1963 | * sessiond_cleanup() is called when no other thread is running, except | |
1964 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
1965 | */ | |
1966 | rcu_thread_online(); | |
1967 | sessiond_cleanup(); | |
06f525de | 1968 | |
3b8a092f | 1969 | /* |
1d25334c | 1970 | * Wait for all pending call_rcu work to complete before shutting down |
3b8a092f FD |
1971 | * the notification thread. This call_rcu work includes shutting down |
1972 | * UST apps and event notifier pipes. | |
1973 | */ | |
1974 | rcu_barrier(); | |
1975 | ||
4a91420c JG |
1976 | if (notification_thread) { |
1977 | lttng_thread_shutdown(notification_thread); | |
1978 | lttng_thread_put(notification_thread); | |
1979 | } | |
1980 | ||
90aa04a1 | 1981 | /* |
1d25334c FD |
1982 | * Error accounting teardown has to be done after the teardown of all |
1983 | * event notifier pipes to ensure that no tracer may try to use the | |
1984 | * error accounting facilities. | |
90aa04a1 FD |
1985 | */ |
1986 | event_notifier_error_accounting_fini(); | |
1987 | ||
1d25334c FD |
1988 | /* |
1989 | * Unloading the kernel modules needs to be done after all kernel | |
1990 | * ressources have been released. In our case, this includes the | |
1991 | * notification fd, the event notifier group fd, error accounting fd, | |
1992 | * all event and event notifier fds, etc. | |
1993 | * | |
1994 | * In short, at this point, we need to have called close() on all fds | |
1995 | * received from the kernel tracer. | |
1996 | */ | |
412d7227 | 1997 | if (is_root && !the_config.no_kernel) { |
1d25334c FD |
1998 | DBG("Unloading kernel modules"); |
1999 | modprobe_remove_lttng_all(); | |
2000 | } | |
2001 | ||
c4d5de9d JG |
2002 | /* |
2003 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
2004 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
2005 | * the queue is empty before shutting down the clean-up thread. | |
2006 | */ | |
2007 | rcu_barrier(); | |
2008 | ||
a3707772 JG |
2009 | if (ht_cleanup_thread) { |
2010 | lttng_thread_shutdown(ht_cleanup_thread); | |
2011 | lttng_thread_put(ht_cleanup_thread); | |
2012 | } | |
2013 | ||
64d9b072 JG |
2014 | rcu_thread_offline(); |
2015 | rcu_unregister_thread(); | |
2016 | ||
2017 | if (rotation_thread_handle) { | |
2018 | rotation_thread_handle_destroy(rotation_thread_handle); | |
2019 | } | |
2020 | ||
d086f507 JD |
2021 | /* |
2022 | * After the rotation and timer thread have quit, we can safely destroy | |
2023 | * the rotation_timer_queue. | |
2024 | */ | |
92816cc3 | 2025 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
c8a9de5a JG |
2026 | /* |
2027 | * The teardown of the notification system is performed after the | |
2028 | * session daemon's teardown in order to allow it to be notified | |
2029 | * of the active session and channels at the moment of the teardown. | |
2030 | */ | |
412d7227 SM |
2031 | if (the_notification_thread_handle) { |
2032 | notification_thread_handle_destroy( | |
2033 | the_notification_thread_handle); | |
c8a9de5a | 2034 | } |
b3530820 JG |
2035 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
2036 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
2037 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
4a15001e | 2038 | |
412d7227 SM |
2039 | if (the_health_sessiond) { |
2040 | health_app_destroy(the_health_sessiond); | |
9bc2ec5f | 2041 | } |
7567352f | 2042 | exit_create_run_as_worker_cleanup: |
4a15001e | 2043 | exit_options: |
f472090a | 2044 | sessiond_cleanup_lock_file(); |
4a15001e MD |
2045 | sessiond_cleanup_options(); |
2046 | ||
2047 | exit_set_signal_handler: | |
2048 | if (!retval) { | |
cf3af59e | 2049 | exit(EXIT_SUCCESS); |
4a15001e MD |
2050 | } else { |
2051 | exit(EXIT_FAILURE); | |
67e40797 | 2052 | } |
fac6795d | 2053 | } |