Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa MJ |
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 |
28ab034a JG |
11 | #include "agent-thread.hpp" |
12 | #include "agent.hpp" | |
13 | #include "buffer-registry.hpp" | |
14 | #include "channel.hpp" | |
15 | #include "client.hpp" | |
16 | #include "cmd.hpp" | |
17 | #include "consumer.hpp" | |
18 | #include "context.hpp" | |
19 | #include "dispatch.hpp" | |
20 | #include "event-notifier-error-accounting.hpp" | |
21 | #include "event.hpp" | |
22 | #include "fd-limit.hpp" | |
23 | #include "health-sessiond.hpp" | |
24 | #include "kernel-consumer.hpp" | |
25 | #include "kernel.hpp" | |
26 | #include "lttng-sessiond.hpp" | |
27 | #include "lttng-ust-ctl.hpp" | |
28 | #include "manage-apps.hpp" | |
29 | #include "manage-kernel.hpp" | |
30 | #include "modprobe.hpp" | |
31 | #include "notification-thread-commands.hpp" | |
32 | #include "notification-thread.hpp" | |
33 | #include "notify-apps.hpp" | |
34 | #include "register.hpp" | |
35 | #include "rotation-thread.hpp" | |
36 | #include "save.hpp" | |
37 | #include "sessiond-config.hpp" | |
38 | #include "testpoint.hpp" | |
39 | #include "thread.hpp" | |
40 | #include "timer.hpp" | |
41 | #include "ust-consumer.hpp" | |
42 | #include "ust-sigbus.hpp" | |
43 | #include "utils.hpp" | |
44 | ||
45 | #include <common/common.hpp> | |
46 | #include <common/compat/getenv.hpp> | |
47 | #include <common/compat/socket.hpp> | |
48 | #include <common/config/session-config.hpp> | |
49 | #include <common/daemonize.hpp> | |
50 | #include <common/defaults.hpp> | |
51 | #include <common/dynamic-buffer.hpp> | |
52 | #include <common/futex.hpp> | |
53 | #include <common/ini-config/ini-config.hpp> | |
54 | #include <common/kernel-consumer/kernel-consumer.hpp> | |
51379287 | 55 | #include <common/lockfile.hpp> |
28ab034a JG |
56 | #include <common/logging-utils.hpp> |
57 | #include <common/path.hpp> | |
58 | #include <common/relayd/relayd.hpp> | |
59 | #include <common/utils.hpp> | |
60 | ||
61 | #include <lttng/event-internal.hpp> | |
62 | ||
63 | #include <ctype.h> | |
fac6795d DG |
64 | #include <getopt.h> |
65 | #include <grp.h> | |
28ab034a | 66 | #include <inttypes.h> |
fac6795d | 67 | #include <limits.h> |
0bb7724a | 68 | #include <paths.h> |
fac6795d DG |
69 | #include <pthread.h> |
70 | #include <signal.h> | |
71 | #include <stdio.h> | |
72 | #include <stdlib.h> | |
73 | #include <string.h> | |
0fdd1e2c | 74 | #include <sys/mman.h> |
b73401da | 75 | #include <sys/mount.h> |
1e307fab | 76 | #include <sys/resource.h> |
fac6795d DG |
77 | #include <sys/socket.h> |
78 | #include <sys/stat.h> | |
79 | #include <sys/types.h> | |
0fdd1e2c | 80 | #include <sys/wait.h> |
fac6795d | 81 | #include <unistd.h> |
28ab034a | 82 | #include <urcu/uatomic.h> |
ebaeda94 | 83 | |
4fc83d94 PP |
84 | static const char *help_msg = |
85 | #ifdef LTTNG_EMBED_HELP | |
86 | #include <lttng-sessiond.8.h> | |
87 | #else | |
cd9adb8b | 88 | nullptr |
4fc83d94 | 89 | #endif |
28ab034a | 90 | ; |
4fc83d94 | 91 | |
90aa04a1 | 92 | #define EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX 65535 |
28ab034a | 93 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR "event-notifier-error-buffer-size" |
761ffce2 | 94 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR \ |
28ab034a | 95 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR "-kernel" |
761ffce2 | 96 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR \ |
28ab034a | 97 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR "-userspace" |
90aa04a1 | 98 | |
fac6795d | 99 | const char *progname; |
c9cb3e7d | 100 | static int lockfile_fd = -1; |
a3bc3918 | 101 | static int opt_print_version; |
3bd1e081 | 102 | |
0bb7724a DG |
103 | /* Set to 1 when a SIGUSR1 signal is received. */ |
104 | static int recv_child_signal; | |
105 | ||
26296c48 JG |
106 | /* Command line options */ |
107 | static const struct option long_options[] = { | |
cd9adb8b JG |
108 | { "client-sock", required_argument, nullptr, 'c' }, |
109 | { "apps-sock", required_argument, nullptr, 'a' }, | |
110 | { "kconsumerd-cmd-sock", required_argument, nullptr, '\0' }, | |
111 | { "kconsumerd-err-sock", required_argument, nullptr, '\0' }, | |
112 | { "ustconsumerd32-cmd-sock", required_argument, nullptr, '\0' }, | |
113 | { "ustconsumerd32-err-sock", required_argument, nullptr, '\0' }, | |
114 | { "ustconsumerd64-cmd-sock", required_argument, nullptr, '\0' }, | |
115 | { "ustconsumerd64-err-sock", required_argument, nullptr, '\0' }, | |
116 | { "consumerd32-path", required_argument, nullptr, '\0' }, | |
117 | { "consumerd32-libdir", required_argument, nullptr, '\0' }, | |
118 | { "consumerd64-path", required_argument, nullptr, '\0' }, | |
119 | { "consumerd64-libdir", required_argument, nullptr, '\0' }, | |
120 | { "daemonize", no_argument, nullptr, 'd' }, | |
121 | { "background", no_argument, nullptr, 'b' }, | |
122 | { "sig-parent", no_argument, nullptr, 'S' }, | |
123 | { "help", no_argument, nullptr, 'h' }, | |
124 | { "group", required_argument, nullptr, 'g' }, | |
125 | { "version", no_argument, nullptr, 'V' }, | |
126 | { "quiet", no_argument, nullptr, 'q' }, | |
127 | { "verbose", no_argument, nullptr, 'v' }, | |
128 | { "verbose-consumer", no_argument, nullptr, '\0' }, | |
129 | { "no-kernel", no_argument, nullptr, '\0' }, | |
130 | { "pidfile", required_argument, nullptr, 'p' }, | |
131 | { "agent-tcp-port", required_argument, nullptr, '\0' }, | |
132 | { "config", required_argument, nullptr, 'f' }, | |
133 | { "load", required_argument, nullptr, 'l' }, | |
134 | { "kmod-probes", required_argument, nullptr, '\0' }, | |
135 | { "extra-kmod-probes", required_argument, nullptr, '\0' }, | |
136 | { EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, required_argument, nullptr, '\0' }, | |
137 | { EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, required_argument, nullptr, '\0' }, | |
138 | { nullptr, 0, nullptr, 0 } | |
26296c48 JG |
139 | }; |
140 | ||
141 | /* Command line options to ignore from configuration file */ | |
142 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
1d4b027a | 143 | |
099e26bd DG |
144 | /* |
145 | * This pipe is used to inform the thread managing application communication | |
146 | * that a command is queued and ready to be processed. | |
147 | */ | |
76d7553f | 148 | static int apps_cmd_pipe[2] = { -1, -1 }; |
971a61c6 | 149 | static int apps_cmd_notify_pipe[2] = { -1, -1 }; |
099e26bd | 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 | ||
97bc1426 | 162 | /* |
a7333da7 | 163 | * Section name to look for in the daemon configuration file. |
97bc1426 | 164 | */ |
28ab034a | 165 | static const char *const config_section_name = "sessiond"; |
5e97de00 | 166 | |
a7333da7 JG |
167 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
168 | static int is_root; | |
5eb91c98 | 169 | |
099e26bd | 170 | /* |
f90a04ed MJ |
171 | * Notify the main thread to initiate the teardown of the worker threads by |
172 | * writing to the main quit pipe. | |
099e26bd | 173 | */ |
cd9adb8b | 174 | static void notify_main_quit_pipe() |
cf3af59e | 175 | { |
5eb91c98 DG |
176 | int ret; |
177 | ||
cf3af59e | 178 | /* Stopping all threads */ |
f90a04ed MJ |
179 | DBG("Notify the main thread to terminate all worker threads"); |
180 | ret = sessiond_notify_main_quit_pipe(); | |
5eb91c98 | 181 | if (ret < 0) { |
f90a04ed | 182 | ERR("write error on main quit pipe"); |
5eb91c98 | 183 | } |
cf3af59e MD |
184 | } |
185 | ||
e975f9f8 DG |
186 | /* |
187 | * Close every consumer sockets. | |
188 | */ | |
cd9adb8b | 189 | static void close_consumer_sockets() |
e975f9f8 DG |
190 | { |
191 | int ret; | |
192 | ||
412d7227 SM |
193 | if (the_kconsumer_data.err_sock >= 0) { |
194 | ret = close(the_kconsumer_data.err_sock); | |
e975f9f8 DG |
195 | if (ret < 0) { |
196 | PERROR("kernel consumer err_sock close"); | |
197 | } | |
198 | } | |
412d7227 SM |
199 | if (the_ustconsumer32_data.err_sock >= 0) { |
200 | ret = close(the_ustconsumer32_data.err_sock); | |
e975f9f8 | 201 | if (ret < 0) { |
a76cbd9f | 202 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
203 | } |
204 | } | |
412d7227 SM |
205 | if (the_ustconsumer64_data.err_sock >= 0) { |
206 | ret = close(the_ustconsumer64_data.err_sock); | |
e975f9f8 | 207 | if (ret < 0) { |
a76cbd9f | 208 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
209 | } |
210 | } | |
412d7227 SM |
211 | if (the_kconsumer_data.cmd_sock >= 0) { |
212 | ret = close(the_kconsumer_data.cmd_sock); | |
e975f9f8 DG |
213 | if (ret < 0) { |
214 | PERROR("kernel consumer cmd_sock close"); | |
215 | } | |
216 | } | |
412d7227 SM |
217 | if (the_ustconsumer32_data.cmd_sock >= 0) { |
218 | ret = close(the_ustconsumer32_data.cmd_sock); | |
e975f9f8 | 219 | if (ret < 0) { |
a76cbd9f | 220 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
221 | } |
222 | } | |
412d7227 SM |
223 | if (the_ustconsumer64_data.cmd_sock >= 0) { |
224 | ret = close(the_ustconsumer64_data.cmd_sock); | |
e975f9f8 | 225 | if (ret < 0) { |
a76cbd9f | 226 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
227 | } |
228 | } | |
412d7227 SM |
229 | if (the_kconsumer_data.channel_monitor_pipe >= 0) { |
230 | ret = close(the_kconsumer_data.channel_monitor_pipe); | |
b3530820 JG |
231 | if (ret < 0) { |
232 | PERROR("kernel consumer channel monitor pipe close"); | |
233 | } | |
234 | } | |
412d7227 SM |
235 | if (the_ustconsumer32_data.channel_monitor_pipe >= 0) { |
236 | ret = close(the_ustconsumer32_data.channel_monitor_pipe); | |
b3530820 JG |
237 | if (ret < 0) { |
238 | PERROR("UST consumerd32 channel monitor pipe close"); | |
239 | } | |
240 | } | |
412d7227 SM |
241 | if (the_ustconsumer64_data.channel_monitor_pipe >= 0) { |
242 | ret = close(the_ustconsumer64_data.channel_monitor_pipe); | |
b3530820 JG |
243 | if (ret < 0) { |
244 | PERROR("UST consumerd64 channel monitor pipe close"); | |
245 | } | |
246 | } | |
e975f9f8 DG |
247 | } |
248 | ||
4e4714cb JR |
249 | /* |
250 | * Wait on consumer process termination. | |
251 | * | |
252 | * Need to be called with the consumer data lock held or from a context | |
253 | * ensuring no concurrent access to data (e.g: cleanup). | |
254 | */ | |
255 | static void wait_consumer(struct consumer_data *consumer_data) | |
256 | { | |
257 | pid_t ret; | |
258 | int status; | |
259 | ||
260 | if (consumer_data->pid <= 0) { | |
261 | return; | |
262 | } | |
263 | ||
28ab034a | 264 | DBG("Waiting for complete teardown of consumerd (PID: %d)", consumer_data->pid); |
4e4714cb JR |
265 | ret = waitpid(consumer_data->pid, &status, 0); |
266 | if (ret == -1) { | |
267 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
28ab034a JG |
268 | } else if (!WIFEXITED(status)) { |
269 | ERR("consumerd termination with error: %d", WEXITSTATUS(ret)); | |
4e4714cb JR |
270 | } |
271 | consumer_data->pid = 0; | |
272 | } | |
273 | ||
fac6795d | 274 | /* |
4a15001e | 275 | * Cleanup the session daemon's data structures. |
fac6795d | 276 | */ |
cd9adb8b | 277 | static void sessiond_cleanup() |
fac6795d | 278 | { |
ef599319 | 279 | int ret; |
fac6795d | 280 | |
4a15001e | 281 | DBG("Cleanup sessiond"); |
e07ae692 | 282 | |
4e449f3f | 283 | /* |
f90a04ed MJ |
284 | * Close the main quit pipe. It has already done its job, since we are |
285 | * now cleaning up. | |
4e449f3f | 286 | */ |
f90a04ed MJ |
287 | sessiond_close_main_quit_pipe(); |
288 | ||
289 | /* Close all other pipes. */ | |
971a61c6 JG |
290 | utils_close_pipe(apps_cmd_pipe); |
291 | utils_close_pipe(apps_cmd_notify_pipe); | |
412d7227 | 292 | utils_close_pipe(the_kernel_poll_pipe); |
2f77fc4b | 293 | |
412d7227 | 294 | ret = remove(the_config.pid_file_path.value); |
c9a2957d | 295 | if (ret < 0) { |
412d7227 | 296 | PERROR("remove pidfile %s", the_config.pid_file_path.value); |
35f90c40 DG |
297 | } |
298 | ||
28ab034a | 299 | DBG("Removing sessiond and consumerd content of directory %s", the_config.rundir.value); |
8c6c56c2 MD |
300 | |
301 | /* sessiond */ | |
412d7227 SM |
302 | DBG("Removing %s", the_config.pid_file_path.value); |
303 | (void) unlink(the_config.pid_file_path.value); | |
8c6c56c2 | 304 | |
412d7227 SM |
305 | DBG("Removing %s", the_config.agent_port_file_path.value); |
306 | (void) unlink(the_config.agent_port_file_path.value); | |
cd9290dd | 307 | |
8c6c56c2 | 308 | /* kconsumerd */ |
412d7227 SM |
309 | DBG("Removing %s", the_kconsumer_data.err_unix_sock_path); |
310 | (void) unlink(the_kconsumer_data.err_unix_sock_path); | |
e6142f2e | 311 | |
412d7227 SM |
312 | DBG("Removing directory %s", the_config.kconsumerd_path.value); |
313 | (void) rmdir(the_config.kconsumerd_path.value); | |
8c6c56c2 MD |
314 | |
315 | /* ust consumerd 32 */ | |
412d7227 SM |
316 | DBG("Removing %s", the_config.consumerd32_err_unix_sock_path.value); |
317 | (void) unlink(the_config.consumerd32_err_unix_sock_path.value); | |
e6142f2e | 318 | |
412d7227 SM |
319 | DBG("Removing directory %s", the_config.consumerd32_path.value); |
320 | (void) rmdir(the_config.consumerd32_path.value); | |
8c6c56c2 MD |
321 | |
322 | /* ust consumerd 64 */ | |
412d7227 SM |
323 | DBG("Removing %s", the_config.consumerd64_err_unix_sock_path.value); |
324 | (void) unlink(the_config.consumerd64_err_unix_sock_path.value); | |
e6142f2e | 325 | |
412d7227 SM |
326 | DBG("Removing directory %s", the_config.consumerd64_path.value); |
327 | (void) rmdir(the_config.consumerd64_path.value); | |
5461b305 | 328 | |
44760c20 JR |
329 | DBG("Cleaning up all per-event notifier domain agents"); |
330 | agent_by_event_notifier_domain_ht_destroy(); | |
331 | ||
6a4e4039 JG |
332 | DBG("Cleaning up all agent apps"); |
333 | agent_app_ht_clean(); | |
099e26bd | 334 | DBG("Closing all UST sockets"); |
56fff090 | 335 | ust_app_clean_list(); |
7972aab2 | 336 | buffer_reg_destroy_registries(); |
099e26bd | 337 | |
0787fc4b MD |
338 | close_consumer_sockets(); |
339 | ||
412d7227 SM |
340 | wait_consumer(&the_kconsumer_data); |
341 | wait_consumer(&the_ustconsumer64_data); | |
342 | wait_consumer(&the_ustconsumer32_data); | |
0787fc4b | 343 | |
412d7227 | 344 | if (is_root && !the_config.no_kernel) { |
7d268848 | 345 | cleanup_kernel_tracer(); |
2f50c8a3 | 346 | } |
2f77fc4b | 347 | |
c9cb3e7d JG |
348 | /* |
349 | * We do NOT rmdir rundir because there are other processes | |
350 | * using it, for instance lttng-relayd, which can start in | |
351 | * parallel with this teardown. | |
352 | */ | |
4a15001e MD |
353 | } |
354 | ||
355 | /* | |
356 | * Cleanup the daemon's option data structures. | |
357 | */ | |
cd9adb8b | 358 | static void sessiond_cleanup_options() |
4a15001e MD |
359 | { |
360 | DBG("Cleaning up options"); | |
361 | ||
412d7227 | 362 | sessiond_config_fini(&the_config); |
c9cb3e7d | 363 | |
7567352f | 364 | run_as_destroy_worker(); |
fac6795d DG |
365 | } |
366 | ||
917a718d | 367 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 368 | { |
917a718d | 369 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
370 | } |
371 | ||
00e2e675 | 372 | /* |
917a718d JG |
373 | * Take an option from the getopt output and set it in the right variable to be |
374 | * used later. | |
36b588ed | 375 | * |
917a718d | 376 | * Return 0 on success else a negative value. |
00e2e675 | 377 | */ |
917a718d | 378 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 379 | { |
917a718d | 380 | int ret = 0; |
fac6795d | 381 | |
c0232ea5 | 382 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
383 | if (!arg || *arg == '\0') { |
384 | ret = -EINVAL; | |
385 | goto end; | |
386 | } | |
e8fa9fb0 MD |
387 | if (lttng_is_setuid_setgid()) { |
388 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 389 | "-c, --client-sock"); |
e8fa9fb0 | 390 | } else { |
28ab034a | 391 | config_string_set(&the_config.client_unix_sock_path, strdup(arg)); |
412d7227 | 392 | if (!the_config.client_unix_sock_path.value) { |
e6142f2e JG |
393 | ret = -ENOMEM; |
394 | PERROR("strdup"); | |
395 | } | |
e8fa9fb0 | 396 | } |
c0232ea5 | 397 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
398 | if (!arg || *arg == '\0') { |
399 | ret = -EINVAL; | |
400 | goto end; | |
401 | } | |
e8fa9fb0 MD |
402 | if (lttng_is_setuid_setgid()) { |
403 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 404 | "-a, --apps-sock"); |
e8fa9fb0 | 405 | } else { |
28ab034a | 406 | config_string_set(&the_config.apps_unix_sock_path, strdup(arg)); |
412d7227 | 407 | if (!the_config.apps_unix_sock_path.value) { |
e6142f2e JG |
408 | ret = -ENOMEM; |
409 | PERROR("strdup"); | |
410 | } | |
e8fa9fb0 | 411 | } |
c0232ea5 | 412 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
412d7227 | 413 | the_config.daemonize = true; |
c0232ea5 | 414 | } else if (string_match(optname, "background") || opt == 'b') { |
412d7227 | 415 | the_config.background = true; |
c0232ea5 | 416 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
417 | if (!arg || *arg == '\0') { |
418 | ret = -EINVAL; | |
419 | goto end; | |
420 | } | |
e8fa9fb0 MD |
421 | if (lttng_is_setuid_setgid()) { |
422 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 423 | "-g, --group"); |
e8fa9fb0 | 424 | } else { |
28ab034a | 425 | config_string_set(&the_config.tracing_group_name, strdup(arg)); |
412d7227 | 426 | if (!the_config.tracing_group_name.value) { |
e8fa9fb0 | 427 | ret = -ENOMEM; |
e6142f2e | 428 | PERROR("strdup"); |
e8fa9fb0 | 429 | } |
db322c4d | 430 | } |
c0232ea5 | 431 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 432 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 433 | if (ret) { |
4fc83d94 | 434 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
435 | perror("exec"); |
436 | } | |
437 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 438 | } else if (string_match(optname, "version") || opt == 'V') { |
a3bc3918 | 439 | opt_print_version = 1; |
c0232ea5 | 440 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
412d7227 | 441 | the_config.sig_parent = true; |
c0232ea5 | 442 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
443 | if (!arg || *arg == '\0') { |
444 | ret = -EINVAL; | |
445 | goto end; | |
446 | } | |
e8fa9fb0 MD |
447 | if (lttng_is_setuid_setgid()) { |
448 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 449 | "--kconsumerd-err-sock"); |
e8fa9fb0 | 450 | } else { |
28ab034a | 451 | config_string_set(&the_config.kconsumerd_err_unix_sock_path, strdup(arg)); |
412d7227 | 452 | if (!the_config.kconsumerd_err_unix_sock_path.value) { |
e6142f2e JG |
453 | ret = -ENOMEM; |
454 | PERROR("strdup"); | |
455 | } | |
e8fa9fb0 | 456 | } |
c0232ea5 | 457 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
458 | if (!arg || *arg == '\0') { |
459 | ret = -EINVAL; | |
460 | goto end; | |
461 | } | |
e8fa9fb0 MD |
462 | if (lttng_is_setuid_setgid()) { |
463 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 464 | "--kconsumerd-cmd-sock"); |
e8fa9fb0 | 465 | } else { |
28ab034a | 466 | config_string_set(&the_config.kconsumerd_cmd_unix_sock_path, strdup(arg)); |
412d7227 | 467 | if (!the_config.kconsumerd_cmd_unix_sock_path.value) { |
e6142f2e JG |
468 | ret = -ENOMEM; |
469 | PERROR("strdup"); | |
470 | } | |
e8fa9fb0 | 471 | } |
c0232ea5 | 472 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
473 | if (!arg || *arg == '\0') { |
474 | ret = -EINVAL; | |
475 | goto end; | |
476 | } | |
e8fa9fb0 MD |
477 | if (lttng_is_setuid_setgid()) { |
478 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 479 | "--ustconsumerd64-err-sock"); |
e8fa9fb0 | 480 | } else { |
28ab034a | 481 | config_string_set(&the_config.consumerd64_err_unix_sock_path, strdup(arg)); |
412d7227 | 482 | if (!the_config.consumerd64_err_unix_sock_path.value) { |
e6142f2e JG |
483 | ret = -ENOMEM; |
484 | PERROR("strdup"); | |
485 | } | |
e8fa9fb0 | 486 | } |
c0232ea5 | 487 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
488 | if (!arg || *arg == '\0') { |
489 | ret = -EINVAL; | |
490 | goto end; | |
491 | } | |
e8fa9fb0 MD |
492 | if (lttng_is_setuid_setgid()) { |
493 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 494 | "--ustconsumerd64-cmd-sock"); |
e8fa9fb0 | 495 | } else { |
28ab034a | 496 | config_string_set(&the_config.consumerd64_cmd_unix_sock_path, strdup(arg)); |
412d7227 | 497 | if (!the_config.consumerd64_cmd_unix_sock_path.value) { |
e6142f2e JG |
498 | ret = -ENOMEM; |
499 | PERROR("strdup"); | |
500 | } | |
e8fa9fb0 | 501 | } |
c0232ea5 | 502 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
503 | if (!arg || *arg == '\0') { |
504 | ret = -EINVAL; | |
505 | goto end; | |
506 | } | |
e8fa9fb0 MD |
507 | if (lttng_is_setuid_setgid()) { |
508 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 509 | "--ustconsumerd32-err-sock"); |
e8fa9fb0 | 510 | } else { |
28ab034a | 511 | config_string_set(&the_config.consumerd32_err_unix_sock_path, strdup(arg)); |
412d7227 | 512 | if (!the_config.consumerd32_err_unix_sock_path.value) { |
e6142f2e JG |
513 | ret = -ENOMEM; |
514 | PERROR("strdup"); | |
515 | } | |
e8fa9fb0 | 516 | } |
c0232ea5 | 517 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
518 | if (!arg || *arg == '\0') { |
519 | ret = -EINVAL; | |
520 | goto end; | |
521 | } | |
e8fa9fb0 MD |
522 | if (lttng_is_setuid_setgid()) { |
523 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 524 | "--ustconsumerd32-cmd-sock"); |
e8fa9fb0 | 525 | } else { |
28ab034a | 526 | config_string_set(&the_config.consumerd32_cmd_unix_sock_path, strdup(arg)); |
412d7227 | 527 | if (!the_config.consumerd32_cmd_unix_sock_path.value) { |
e6142f2e JG |
528 | ret = -ENOMEM; |
529 | PERROR("strdup"); | |
530 | } | |
e8fa9fb0 | 531 | } |
c0232ea5 | 532 | } else if (string_match(optname, "no-kernel")) { |
412d7227 | 533 | the_config.no_kernel = true; |
c0232ea5 | 534 | } else if (string_match(optname, "quiet") || opt == 'q') { |
412d7227 | 535 | the_config.quiet = true; |
c0232ea5 | 536 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
537 | /* Verbose level can increase using multiple -v */ |
538 | if (arg) { | |
13755a18 | 539 | /* Value obtained from config file */ |
412d7227 | 540 | the_config.verbose = config_parse_value(arg); |
26296c48 | 541 | } else { |
13755a18 | 542 | /* -v used on command line */ |
412d7227 | 543 | the_config.verbose++; |
26296c48 | 544 | } |
13755a18 | 545 | /* Clamp value to [0, 3] */ |
412d7227 | 546 | the_config.verbose = the_config.verbose < 0 ? |
28ab034a JG |
547 | 0 : |
548 | (the_config.verbose <= 3 ? the_config.verbose : 3); | |
c0232ea5 | 549 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 550 | if (arg) { |
412d7227 | 551 | the_config.verbose_consumer = config_parse_value(arg); |
26296c48 | 552 | } else { |
412d7227 | 553 | the_config.verbose_consumer++; |
26296c48 | 554 | } |
c0232ea5 | 555 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
556 | if (!arg || *arg == '\0') { |
557 | ret = -EINVAL; | |
558 | goto end; | |
559 | } | |
e8fa9fb0 MD |
560 | if (lttng_is_setuid_setgid()) { |
561 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 562 | "--consumerd32-path"); |
e8fa9fb0 | 563 | } else { |
28ab034a | 564 | config_string_set(&the_config.consumerd32_bin_path, strdup(arg)); |
412d7227 | 565 | if (!the_config.consumerd32_bin_path.value) { |
e8fa9fb0 MD |
566 | PERROR("strdup"); |
567 | ret = -ENOMEM; | |
568 | } | |
db322c4d | 569 | } |
c0232ea5 | 570 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
571 | if (!arg || *arg == '\0') { |
572 | ret = -EINVAL; | |
573 | goto end; | |
574 | } | |
e8fa9fb0 MD |
575 | if (lttng_is_setuid_setgid()) { |
576 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 577 | "--consumerd32-libdir"); |
e8fa9fb0 | 578 | } else { |
28ab034a | 579 | config_string_set(&the_config.consumerd32_lib_dir, strdup(arg)); |
412d7227 | 580 | if (!the_config.consumerd32_lib_dir.value) { |
e8fa9fb0 MD |
581 | PERROR("strdup"); |
582 | ret = -ENOMEM; | |
583 | } | |
db322c4d | 584 | } |
c0232ea5 | 585 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
586 | if (!arg || *arg == '\0') { |
587 | ret = -EINVAL; | |
588 | goto end; | |
589 | } | |
e8fa9fb0 MD |
590 | if (lttng_is_setuid_setgid()) { |
591 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 592 | "--consumerd64-path"); |
e8fa9fb0 | 593 | } else { |
28ab034a | 594 | config_string_set(&the_config.consumerd64_bin_path, strdup(arg)); |
412d7227 | 595 | if (!the_config.consumerd64_bin_path.value) { |
e8fa9fb0 MD |
596 | PERROR("strdup"); |
597 | ret = -ENOMEM; | |
598 | } | |
db322c4d | 599 | } |
c0232ea5 | 600 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
601 | if (!arg || *arg == '\0') { |
602 | ret = -EINVAL; | |
603 | goto end; | |
604 | } | |
e8fa9fb0 MD |
605 | if (lttng_is_setuid_setgid()) { |
606 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 607 | "--consumerd64-libdir"); |
e8fa9fb0 | 608 | } else { |
28ab034a | 609 | config_string_set(&the_config.consumerd64_lib_dir, strdup(arg)); |
412d7227 | 610 | if (!the_config.consumerd64_lib_dir.value) { |
e8fa9fb0 MD |
611 | PERROR("strdup"); |
612 | ret = -ENOMEM; | |
613 | } | |
db322c4d | 614 | } |
c0232ea5 | 615 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
616 | if (!arg || *arg == '\0') { |
617 | ret = -EINVAL; | |
618 | goto end; | |
619 | } | |
e8fa9fb0 MD |
620 | if (lttng_is_setuid_setgid()) { |
621 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 622 | "-p, --pidfile"); |
e8fa9fb0 | 623 | } else { |
28ab034a | 624 | config_string_set(&the_config.pid_file_path, strdup(arg)); |
412d7227 | 625 | if (!the_config.pid_file_path.value) { |
e8fa9fb0 MD |
626 | PERROR("strdup"); |
627 | ret = -ENOMEM; | |
628 | } | |
db322c4d | 629 | } |
c0232ea5 | 630 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
631 | if (!arg || *arg == '\0') { |
632 | ret = -EINVAL; | |
633 | goto end; | |
634 | } | |
e8fa9fb0 MD |
635 | if (lttng_is_setuid_setgid()) { |
636 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 637 | "--agent-tcp-port"); |
e8fa9fb0 MD |
638 | } else { |
639 | unsigned long v; | |
4d076222 | 640 | |
e8fa9fb0 | 641 | errno = 0; |
cd9adb8b | 642 | v = strtoul(arg, nullptr, 0); |
e8fa9fb0 MD |
643 | if (errno != 0 || !isdigit(arg[0])) { |
644 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
645 | return -1; | |
646 | } | |
647 | if (v == 0 || v >= 65535) { | |
648 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
649 | return -1; | |
650 | } | |
28ab034a | 651 | the_config.agent_tcp_port.begin = the_config.agent_tcp_port.end = (int) v; |
2288467f | 652 | DBG3("Agent TCP port set to non default: %i", (int) v); |
26296c48 | 653 | } |
c0232ea5 | 654 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
655 | if (!arg || *arg == '\0') { |
656 | ret = -EINVAL; | |
657 | goto end; | |
658 | } | |
e8fa9fb0 MD |
659 | if (lttng_is_setuid_setgid()) { |
660 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 661 | "-l, --load"); |
e8fa9fb0 | 662 | } else { |
28ab034a | 663 | config_string_set(&the_config.load_session_path, strdup(arg)); |
412d7227 | 664 | if (!the_config.load_session_path.value) { |
e8fa9fb0 MD |
665 | PERROR("strdup"); |
666 | ret = -ENOMEM; | |
667 | } | |
ef367a93 | 668 | } |
c0232ea5 | 669 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
670 | if (!arg || *arg == '\0') { |
671 | ret = -EINVAL; | |
672 | goto end; | |
673 | } | |
e8fa9fb0 MD |
674 | if (lttng_is_setuid_setgid()) { |
675 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 676 | "--kmod-probes"); |
e8fa9fb0 | 677 | } else { |
28ab034a | 678 | config_string_set(&the_config.kmod_probes_list, strdup(arg)); |
412d7227 | 679 | if (!the_config.kmod_probes_list.value) { |
e8fa9fb0 MD |
680 | PERROR("strdup"); |
681 | ret = -ENOMEM; | |
682 | } | |
c9d42407 | 683 | } |
c0232ea5 | 684 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
685 | if (!arg || *arg == '\0') { |
686 | ret = -EINVAL; | |
687 | goto end; | |
688 | } | |
e8fa9fb0 MD |
689 | if (lttng_is_setuid_setgid()) { |
690 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 691 | "--extra-kmod-probes"); |
e8fa9fb0 | 692 | } else { |
28ab034a | 693 | config_string_set(&the_config.kmod_extra_probes_list, strdup(arg)); |
412d7227 | 694 | if (!the_config.kmod_extra_probes_list.value) { |
e8fa9fb0 MD |
695 | PERROR("strdup"); |
696 | ret = -ENOMEM; | |
697 | } | |
db322c4d | 698 | } |
761ffce2 | 699 | } else if (string_match(optname, EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR)) { |
90aa04a1 FD |
700 | unsigned long v; |
701 | ||
702 | errno = 0; | |
cd9adb8b | 703 | v = strtoul(arg, nullptr, 0); |
90aa04a1 | 704 | if (errno != 0 || !isdigit(arg[0])) { |
761ffce2 | 705 | ERR("Wrong value in --%s parameter: %s", |
28ab034a JG |
706 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, |
707 | arg); | |
90aa04a1 FD |
708 | return -1; |
709 | } | |
710 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
761ffce2 | 711 | ERR("Value out of range for --%s parameter: %s", |
28ab034a JG |
712 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, |
713 | arg); | |
90aa04a1 FD |
714 | return -1; |
715 | } | |
761ffce2 FD |
716 | the_config.event_notifier_buffer_size_kernel = (int) v; |
717 | DBG3("Number of event notifier error buffer kernel size to non default: %i", | |
28ab034a | 718 | the_config.event_notifier_buffer_size_kernel); |
761ffce2 FD |
719 | goto end; |
720 | } else if (string_match(optname, EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR)) { | |
721 | unsigned long v; | |
722 | ||
723 | errno = 0; | |
cd9adb8b | 724 | v = strtoul(arg, nullptr, 0); |
761ffce2 FD |
725 | if (errno != 0 || !isdigit(arg[0])) { |
726 | ERR("Wrong value in --%s parameter: %s", | |
28ab034a JG |
727 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, |
728 | arg); | |
761ffce2 FD |
729 | return -1; |
730 | } | |
731 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
732 | ERR("Value out of range for --%s parameter: %s", | |
28ab034a JG |
733 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, |
734 | arg); | |
761ffce2 FD |
735 | return -1; |
736 | } | |
737 | the_config.event_notifier_buffer_size_userspace = (int) v; | |
738 | DBG3("Number of event notifier error buffer userspace size to non default: %i", | |
28ab034a | 739 | the_config.event_notifier_buffer_size_userspace); |
90aa04a1 | 740 | goto end; |
c0232ea5 JG |
741 | } else if (string_match(optname, "config") || opt == 'f') { |
742 | /* This is handled in set_options() thus silent skip. */ | |
743 | goto end; | |
744 | } else { | |
26296c48 JG |
745 | /* Unknown option or other error. |
746 | * Error is printed by getopt, just return */ | |
747 | ret = -1; | |
748 | } | |
749 | ||
f3dd7ce7 | 750 | end: |
c5d350b2 JG |
751 | if (ret == -EINVAL) { |
752 | const char *opt_name = "unknown"; | |
753 | int i; | |
754 | ||
28ab034a | 755 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); i++) { |
c5d350b2 JG |
756 | if (opt == long_options[i].val) { |
757 | opt_name = long_options[i].name; | |
758 | break; | |
759 | } | |
760 | } | |
761 | ||
28ab034a | 762 | WARN("Invalid argument provided for option \"%s\", using default value.", opt_name); |
c5d350b2 | 763 | } |
f3dd7ce7 | 764 | |
26296c48 JG |
765 | return ret; |
766 | } | |
767 | ||
768 | /* | |
769 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 770 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
771 | * return value conventions. |
772 | */ | |
f46376a1 | 773 | static int config_entry_handler(const struct config_entry *entry, |
28ab034a | 774 | void *unused __attribute__((unused))) |
26296c48 JG |
775 | { |
776 | int ret = 0, i; | |
777 | ||
778 | if (!entry || !entry->name || !entry->value) { | |
779 | ret = -EINVAL; | |
780 | goto end; | |
781 | } | |
782 | ||
783 | /* Check if the option is to be ignored */ | |
784 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
785 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
786 | goto end; | |
787 | } | |
788 | } | |
789 | ||
28ab034a | 790 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; i++) { |
26296c48 | 791 | /* Ignore if not fully matched. */ |
5c7248cd | 792 | if (strcmp(entry->name, long_options[i].name) != 0) { |
26296c48 JG |
793 | continue; |
794 | } | |
795 | ||
796 | /* | |
797 | * If the option takes no argument on the command line, we have to | |
798 | * check if the value is "true". We support non-zero numeric values, | |
799 | * true, on and yes. | |
800 | */ | |
801 | if (!long_options[i].has_arg) { | |
802 | ret = config_parse_value(entry->value); | |
803 | if (ret <= 0) { | |
804 | if (ret) { | |
805 | WARN("Invalid configuration value \"%s\" for option %s", | |
28ab034a JG |
806 | entry->value, |
807 | entry->name); | |
26296c48 JG |
808 | } |
809 | /* False, skip boolean config option. */ | |
810 | goto end; | |
4d076222 | 811 | } |
26296c48 JG |
812 | } |
813 | ||
814 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
815 | goto end; | |
816 | } | |
817 | ||
818 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
819 | ||
820 | end: | |
821 | return ret; | |
822 | } | |
823 | ||
cd9adb8b | 824 | static void print_version() |
28ab034a | 825 | { |
a3bc3918 JR |
826 | fprintf(stdout, "%s\n", VERSION); |
827 | } | |
828 | ||
26296c48 JG |
829 | /* |
830 | * daemon configuration loading and argument parsing | |
831 | */ | |
832 | static int set_options(int argc, char **argv) | |
833 | { | |
834 | int ret = 0, c = 0, option_index = 0; | |
835 | int orig_optopt = optopt, orig_optind = optind; | |
836 | char *optstring; | |
cd9adb8b | 837 | char *config_path = nullptr; |
26296c48 JG |
838 | |
839 | optstring = utils_generate_optstring(long_options, | |
28ab034a | 840 | sizeof(long_options) / sizeof(struct option)); |
26296c48 JG |
841 | if (!optstring) { |
842 | ret = -ENOMEM; | |
843 | goto end; | |
844 | } | |
845 | ||
846 | /* Check for the --config option */ | |
28ab034a | 847 | while ((c = getopt_long(argc, argv, optstring, long_options, &option_index)) != -1) { |
26296c48 JG |
848 | if (c == '?') { |
849 | ret = -EINVAL; | |
850 | goto end; | |
851 | } else if (c != 'f') { | |
852 | /* if not equal to --config option. */ | |
853 | continue; | |
854 | } | |
855 | ||
e8fa9fb0 MD |
856 | if (lttng_is_setuid_setgid()) { |
857 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
28ab034a | 858 | "-f, --config"); |
e8fa9fb0 | 859 | } else { |
fcf27bee | 860 | free(config_path); |
e8fa9fb0 MD |
861 | config_path = utils_expand_path(optarg); |
862 | if (!config_path) { | |
863 | ERR("Failed to resolve path: %s", optarg); | |
864 | } | |
26296c48 JG |
865 | } |
866 | } | |
867 | ||
28ab034a | 868 | ret = config_get_section_entries( |
cd9adb8b | 869 | config_path, config_section_name, config_entry_handler, nullptr); |
26296c48 JG |
870 | if (ret) { |
871 | if (ret > 0) { | |
872 | ERR("Invalid configuration option at line %i", ret); | |
873 | ret = -1; | |
874 | } | |
875 | goto end; | |
876 | } | |
877 | ||
878 | /* Reset getopt's global state */ | |
879 | optopt = orig_optopt; | |
880 | optind = orig_optind; | |
cd9adb8b | 881 | while (true) { |
c0232ea5 JG |
882 | option_index = -1; |
883 | /* | |
884 | * getopt_long() will not set option_index if it encounters a | |
885 | * short option. | |
886 | */ | |
28ab034a | 887 | c = getopt_long(argc, argv, optstring, long_options, &option_index); |
26296c48 | 888 | if (c == -1) { |
4d076222 DG |
889 | break; |
890 | } | |
26296c48 | 891 | |
c0232ea5 JG |
892 | /* |
893 | * Pass NULL as the long option name if popt left the index | |
894 | * unset. | |
895 | */ | |
28ab034a | 896 | ret = set_option( |
cd9adb8b | 897 | c, optarg, option_index < 0 ? nullptr : long_options[option_index].name); |
26296c48 JG |
898 | if (ret < 0) { |
899 | break; | |
fac6795d DG |
900 | } |
901 | } | |
902 | ||
26296c48 | 903 | end: |
fcf27bee | 904 | free(config_path); |
26296c48 JG |
905 | free(optstring); |
906 | return ret; | |
fac6795d DG |
907 | } |
908 | ||
f472090a JG |
909 | /* |
910 | * Create lockfile using the rundir and return its fd. | |
911 | */ | |
cd9adb8b | 912 | static int create_lockfile() |
f472090a | 913 | { |
412d7227 | 914 | return utils_create_lock_file(the_config.lock_file_path.value); |
f472090a JG |
915 | } |
916 | ||
fac6795d | 917 | /* |
54d01ffb DG |
918 | * Check if the global socket is available, and if a daemon is answering at the |
919 | * other side. If yes, error is returned. | |
f472090a JG |
920 | * |
921 | * Also attempts to create and hold the lock file. | |
fac6795d | 922 | */ |
cd9adb8b | 923 | static int check_existing_daemon() |
fac6795d | 924 | { |
f472090a JG |
925 | int ret = 0; |
926 | ||
7d8234d9 | 927 | /* Is there anybody out there ? */ |
099e26bd | 928 | if (lttng_session_daemon_alive()) { |
f472090a JG |
929 | ret = -EEXIST; |
930 | goto end; | |
099e26bd | 931 | } |
b09c7c76 | 932 | |
f472090a JG |
933 | lockfile_fd = create_lockfile(); |
934 | if (lockfile_fd < 0) { | |
935 | ret = -EEXIST; | |
936 | goto end; | |
937 | } | |
938 | end: | |
939 | return ret; | |
940 | } | |
941 | ||
cd9adb8b | 942 | static void sessiond_cleanup_lock_file() |
f472090a JG |
943 | { |
944 | int ret; | |
945 | ||
946 | /* | |
947 | * Cleanup lock file by deleting it and finaly closing it which will | |
948 | * release the file system lock. | |
949 | */ | |
950 | if (lockfile_fd >= 0) { | |
412d7227 | 951 | ret = remove(the_config.lock_file_path.value); |
f472090a JG |
952 | if (ret < 0) { |
953 | PERROR("remove lock file"); | |
954 | } | |
955 | ret = close(lockfile_fd); | |
956 | if (ret < 0) { | |
957 | PERROR("close lock file"); | |
958 | } | |
959 | } | |
fac6795d DG |
960 | } |
961 | ||
fac6795d | 962 | /* |
d063d709 | 963 | * Set the tracing group gid onto the client socket. |
5e16da05 | 964 | * |
d063d709 | 965 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 966 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 967 | */ |
be040666 | 968 | static int set_permissions(char *rundir) |
fac6795d DG |
969 | { |
970 | int ret; | |
996b65c8 | 971 | gid_t gid; |
fac6795d | 972 | |
28ab034a | 973 | ret = utils_get_group_id(the_config.tracing_group_name.value, true, &gid); |
28ab59d0 JR |
974 | if (ret) { |
975 | /* Default to root group. */ | |
976 | gid = 0; | |
977 | } | |
fac6795d | 978 | |
d6f42150 | 979 | /* Set lttng run dir */ |
be040666 | 980 | ret = chown(rundir, 0, gid); |
d6f42150 | 981 | if (ret < 0) { |
be040666 | 982 | ERR("Unable to set group on %s", rundir); |
76d7553f | 983 | PERROR("chown"); |
d6f42150 DG |
984 | } |
985 | ||
6c71277b MD |
986 | /* |
987 | * Ensure all applications and tracing group can search the run | |
988 | * dir. Allow everyone to read the directory, since it does not | |
989 | * buy us anything to hide its content. | |
990 | */ | |
991 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
992 | if (ret < 0) { |
993 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 994 | PERROR("chmod"); |
d1613cf5 JN |
995 | } |
996 | ||
d6f42150 | 997 | /* lttng client socket path */ |
412d7227 | 998 | ret = chown(the_config.client_unix_sock_path.value, 0, gid); |
fac6795d | 999 | if (ret < 0) { |
28ab034a | 1000 | ERR("Unable to set group on %s", the_config.client_unix_sock_path.value); |
76d7553f | 1001 | PERROR("chown"); |
d6f42150 DG |
1002 | } |
1003 | ||
3bd1e081 | 1004 | /* kconsumer error socket path */ |
412d7227 | 1005 | ret = chown(the_kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 1006 | if (ret < 0) { |
28ab034a | 1007 | ERR("Unable to set group on %s", the_kconsumer_data.err_unix_sock_path); |
76d7553f | 1008 | PERROR("chown"); |
3bd1e081 MD |
1009 | } |
1010 | ||
7753dea8 | 1011 | /* 64-bit ustconsumer error socket path */ |
412d7227 | 1012 | ret = chown(the_ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 | 1013 | if (ret < 0) { |
28ab034a | 1014 | ERR("Unable to set group on %s", the_ustconsumer64_data.err_unix_sock_path); |
76d7553f | 1015 | PERROR("chown"); |
7753dea8 MD |
1016 | } |
1017 | ||
1018 | /* 32-bit ustconsumer compat32 error socket path */ | |
412d7227 | 1019 | ret = chown(the_ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1020 | if (ret < 0) { |
28ab034a | 1021 | ERR("Unable to set group on %s", the_ustconsumer32_data.err_unix_sock_path); |
76d7553f | 1022 | PERROR("chown"); |
fac6795d DG |
1023 | } |
1024 | ||
d6f42150 | 1025 | DBG("All permissions are set"); |
e07ae692 | 1026 | |
fac6795d DG |
1027 | return ret; |
1028 | } | |
1029 | ||
d6f42150 | 1030 | /* |
d063d709 | 1031 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1032 | */ |
cd9adb8b | 1033 | static int create_lttng_rundir() |
d6f42150 DG |
1034 | { |
1035 | int ret; | |
1036 | ||
412d7227 | 1037 | DBG3("Creating LTTng run directory: %s", the_config.rundir.value); |
67e40797 | 1038 | |
412d7227 | 1039 | ret = mkdir(the_config.rundir.value, S_IRWXU); |
d6f42150 | 1040 | if (ret < 0) { |
b1f11e69 | 1041 | if (errno != EEXIST) { |
412d7227 | 1042 | ERR("Unable to create %s", the_config.rundir.value); |
b1f11e69 DG |
1043 | goto error; |
1044 | } else { | |
1045 | ret = 0; | |
1046 | } | |
d6f42150 DG |
1047 | } |
1048 | ||
1049 | error: | |
1050 | return ret; | |
1051 | } | |
1052 | ||
1053 | /* | |
e6142f2e | 1054 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1055 | * session daemon. |
d6f42150 | 1056 | */ |
e6142f2e | 1057 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1058 | { |
1059 | int ret; | |
cd9adb8b | 1060 | char *path = nullptr; |
d6f42150 | 1061 | |
6c71277b | 1062 | switch (consumer_data->type) { |
7753dea8 | 1063 | case LTTNG_CONSUMER_KERNEL: |
412d7227 | 1064 | path = the_config.kconsumerd_path.value; |
7753dea8 MD |
1065 | break; |
1066 | case LTTNG_CONSUMER64_UST: | |
412d7227 | 1067 | path = the_config.consumerd64_path.value; |
7753dea8 MD |
1068 | break; |
1069 | case LTTNG_CONSUMER32_UST: | |
412d7227 | 1070 | path = the_config.consumerd32_path.value; |
7753dea8 MD |
1071 | break; |
1072 | default: | |
1073 | ERR("Consumer type unknown"); | |
1074 | ret = -EINVAL; | |
1075 | goto error; | |
d6f42150 | 1076 | } |
a0377dfe | 1077 | LTTNG_ASSERT(path); |
d6f42150 | 1078 | |
67e40797 DG |
1079 | DBG2("Creating consumer directory: %s", path); |
1080 | ||
6c71277b | 1081 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1082 | if (ret < 0 && errno != EEXIST) { |
1083 | PERROR("mkdir"); | |
1084 | ERR("Failed to create %s", path); | |
1085 | goto error; | |
d6f42150 | 1086 | } |
6c71277b | 1087 | if (is_root) { |
28ab59d0 JR |
1088 | gid_t gid; |
1089 | ||
28ab034a | 1090 | ret = utils_get_group_id(the_config.tracing_group_name.value, true, &gid); |
28ab59d0 JR |
1091 | if (ret) { |
1092 | /* Default to root group. */ | |
1093 | gid = 0; | |
1094 | } | |
1095 | ||
1096 | ret = chown(path, 0, gid); | |
6c71277b MD |
1097 | if (ret < 0) { |
1098 | ERR("Unable to set group on %s", path); | |
1099 | PERROR("chown"); | |
1100 | goto error; | |
1101 | } | |
1102 | } | |
d6f42150 | 1103 | |
e6142f2e | 1104 | /* Create the consumerd error unix socket */ |
28ab034a | 1105 | consumer_data->err_sock = lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); |
3bd1e081 MD |
1106 | if (consumer_data->err_sock < 0) { |
1107 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1108 | ret = -1; |
1109 | goto error; | |
1110 | } | |
1111 | ||
a24f05ab MD |
1112 | /* |
1113 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1114 | * show must go on. | |
1115 | */ | |
1116 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1117 | if (ret < 0) { | |
1118 | PERROR("utils_set_fd_cloexec"); | |
1119 | /* continue anyway */ | |
1120 | } | |
1121 | ||
d6f42150 | 1122 | /* File permission MUST be 660 */ |
28ab034a | 1123 | ret = chmod(consumer_data->err_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1124 | if (ret < 0) { |
3bd1e081 | 1125 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1126 | PERROR("chmod"); |
d6f42150 DG |
1127 | goto error; |
1128 | } | |
1129 | ||
1130 | error: | |
1131 | return ret; | |
1132 | } | |
1133 | ||
fac6795d | 1134 | /* |
d063d709 | 1135 | * Signal handler for the daemon |
cf3af59e | 1136 | * |
54d01ffb DG |
1137 | * Simply stop all worker threads, leaving main() return gracefully after |
1138 | * joining all threads and calling cleanup(). | |
fac6795d | 1139 | */ |
28ab034a | 1140 | static void sighandler(int sig, siginfo_t *siginfo, void *arg __attribute__((unused))) |
fac6795d DG |
1141 | { |
1142 | switch (sig) { | |
cf3af59e | 1143 | case SIGINT: |
af87c45a | 1144 | DBG("SIGINT caught"); |
f90a04ed | 1145 | notify_main_quit_pipe(); |
cf3af59e MD |
1146 | break; |
1147 | case SIGTERM: | |
af87c45a | 1148 | DBG("SIGTERM caught"); |
f90a04ed | 1149 | notify_main_quit_pipe(); |
cf3af59e | 1150 | break; |
0bb7724a DG |
1151 | case SIGUSR1: |
1152 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1153 | break; | |
881fc67f MD |
1154 | case SIGBUS: |
1155 | { | |
1156 | int write_ret; | |
1157 | const char msg[] = "Received SIGBUS, aborting program.\n"; | |
1158 | ||
1159 | lttng_ust_handle_sigbus(siginfo->si_addr); | |
1160 | /* | |
1161 | * If ustctl did not catch this signal (triggering a | |
1162 | * siglongjmp), abort the program. Otherwise, the execution | |
1163 | * will resume from the ust-ctl call which caused this error. | |
1164 | * | |
1165 | * The return value is ignored since the program aborts anyhow. | |
1166 | */ | |
1167 | write_ret = write(STDERR_FILENO, msg, sizeof(msg)); | |
1168 | (void) write_ret; | |
1169 | abort(); | |
1170 | } | |
cf3af59e MD |
1171 | default: |
1172 | break; | |
fac6795d | 1173 | } |
fac6795d DG |
1174 | } |
1175 | ||
1176 | /* | |
d063d709 | 1177 | * Setup signal handler for : |
1d4b027a | 1178 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1179 | */ |
cd9adb8b | 1180 | static int set_signal_handler() |
fac6795d | 1181 | { |
1d4b027a DG |
1182 | int ret = 0; |
1183 | struct sigaction sa; | |
1184 | sigset_t sigset; | |
fac6795d | 1185 | |
1d4b027a | 1186 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1187 | PERROR("sigemptyset"); |
1d4b027a DG |
1188 | return ret; |
1189 | } | |
d6f42150 | 1190 | |
1d4b027a | 1191 | sa.sa_mask = sigset; |
881fc67f | 1192 | sa.sa_flags = SA_SIGINFO; |
0072e5e2 | 1193 | |
881fc67f | 1194 | sa.sa_sigaction = sighandler; |
cd9adb8b | 1195 | if ((ret = sigaction(SIGTERM, &sa, nullptr)) < 0) { |
76d7553f | 1196 | PERROR("sigaction"); |
1d4b027a | 1197 | return ret; |
d6f42150 DG |
1198 | } |
1199 | ||
cd9adb8b | 1200 | if ((ret = sigaction(SIGINT, &sa, nullptr)) < 0) { |
76d7553f | 1201 | PERROR("sigaction"); |
1d4b027a | 1202 | return ret; |
d6f42150 | 1203 | } |
aaf26714 | 1204 | |
cd9adb8b | 1205 | if ((ret = sigaction(SIGUSR1, &sa, nullptr)) < 0) { |
76d7553f | 1206 | PERROR("sigaction"); |
1d4b027a | 1207 | return ret; |
8c0faa1d DG |
1208 | } |
1209 | ||
cd9adb8b | 1210 | if ((ret = sigaction(SIGBUS, &sa, nullptr)) < 0) { |
881fc67f MD |
1211 | PERROR("sigaction"); |
1212 | return ret; | |
1213 | } | |
1214 | ||
1215 | sa.sa_flags = 0; | |
0072e5e2 | 1216 | sa.sa_handler = SIG_IGN; |
cd9adb8b | 1217 | if ((ret = sigaction(SIGPIPE, &sa, nullptr)) < 0) { |
0bb7724a DG |
1218 | PERROR("sigaction"); |
1219 | return ret; | |
1220 | } | |
1221 | ||
881fc67f | 1222 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE, SIGINT, and SIGBUS"); |
1d4b027a DG |
1223 | |
1224 | return ret; | |
fac6795d DG |
1225 | } |
1226 | ||
f3ed775e | 1227 | /* |
d063d709 | 1228 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1229 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e | 1230 | */ |
cd9adb8b | 1231 | static void set_ulimit() |
f3ed775e DG |
1232 | { |
1233 | int ret; | |
1234 | struct rlimit lim; | |
1235 | ||
514bb9f0 | 1236 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1237 | lim.rlim_cur = 65535; |
1238 | lim.rlim_max = 65535; | |
1239 | ||
1240 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1241 | if (ret < 0) { | |
76d7553f | 1242 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1243 | } |
1244 | } | |
1245 | ||
cd9adb8b | 1246 | static int write_pidfile() |
35f90c40 | 1247 | { |
412d7227 | 1248 | return utils_create_pid_file(getpid(), the_config.pid_file_path.value); |
35f90c40 DG |
1249 | } |
1250 | ||
cd9adb8b | 1251 | static int set_clock_plugin_env() |
e6142f2e JG |
1252 | { |
1253 | int ret = 0; | |
cd9adb8b | 1254 | char *env_value = nullptr; |
cd9290dd | 1255 | |
412d7227 | 1256 | if (!the_config.lttng_ust_clock_plugin.value) { |
e6142f2e JG |
1257 | goto end; |
1258 | } | |
1259 | ||
28ab034a JG |
1260 | ret = asprintf( |
1261 | &env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", the_config.lttng_ust_clock_plugin.value); | |
cd9290dd | 1262 | if (ret < 0) { |
e6142f2e JG |
1263 | PERROR("asprintf"); |
1264 | goto end; | |
cd9290dd DG |
1265 | } |
1266 | ||
e6142f2e JG |
1267 | ret = putenv(env_value); |
1268 | if (ret) { | |
1269 | free(env_value); | |
1270 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1271 | goto end; | |
1272 | } | |
cd9290dd | 1273 | |
e6142f2e | 1274 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
28ab034a | 1275 | the_config.lttng_ust_clock_plugin.value); |
e6142f2e | 1276 | end: |
4a15001e | 1277 | return ret; |
ef367a93 JG |
1278 | } |
1279 | ||
cd9adb8b | 1280 | static void destroy_all_sessions_and_wait() |
99d688f2 | 1281 | { |
a0a4f314 | 1282 | struct ltt_session *raw_session_ptr, *tmp; |
99d688f2 JG |
1283 | struct ltt_session_list *session_list; |
1284 | ||
99d688f2 JG |
1285 | DBG("Initiating destruction of all sessions"); |
1286 | ||
d9a970b7 JG |
1287 | auto list_lock = lttng::sessiond::lock_session_list(); |
1288 | ||
1289 | session_list = session_get_list(); | |
99d688f2 JG |
1290 | if (!session_list) { |
1291 | return; | |
1292 | } | |
1293 | ||
99d688f2 | 1294 | /* Initiate the destruction of all sessions. */ |
a0a4f314 JG |
1295 | cds_list_for_each_entry_safe (raw_session_ptr, tmp, &session_list->head, list) { |
1296 | const auto session = [raw_session_ptr]() { | |
1297 | session_get(raw_session_ptr); | |
1298 | raw_session_ptr->lock(); | |
1299 | return ltt_session::locked_ref(*raw_session_ptr); | |
1300 | }(); | |
99d688f2 | 1301 | |
99d688f2 | 1302 | if (session->destroyed) { |
a0a4f314 | 1303 | continue; |
99d688f2 | 1304 | } |
a0a4f314 | 1305 | |
63763958 | 1306 | (void) cmd_stop_trace(session); |
0038180d | 1307 | (void) cmd_destroy_session(session, nullptr); |
99d688f2 | 1308 | } |
99d688f2 JG |
1309 | |
1310 | /* Wait for the destruction of all sessions to complete. */ | |
1311 | DBG("Waiting for the destruction of all sessions to complete"); | |
d9a970b7 | 1312 | session_list_wait_empty(std::move(list_lock)); |
99d688f2 JG |
1313 | DBG("Destruction of all sessions completed"); |
1314 | } | |
1315 | ||
cd9adb8b | 1316 | static void unregister_all_triggers() |
b69a1b40 JG |
1317 | { |
1318 | enum lttng_error_code ret_code; | |
1319 | enum lttng_trigger_status trigger_status; | |
cd9adb8b | 1320 | struct lttng_triggers *triggers = nullptr; |
b69a1b40 JG |
1321 | unsigned int trigger_count, i; |
1322 | const struct lttng_credentials creds = { | |
e534f206 | 1323 | .uid = LTTNG_OPTIONAL_INIT_VALUE(0), |
1c9a0b0e | 1324 | .gid = LTTNG_OPTIONAL_INIT_UNSET, |
b69a1b40 JG |
1325 | }; |
1326 | ||
1327 | DBG("Unregistering all triggers"); | |
1328 | ||
1329 | /* | |
1330 | * List all triggers as "root" since we wish to unregister all triggers. | |
1331 | */ | |
1332 | ret_code = notification_thread_command_list_triggers( | |
28ab034a | 1333 | the_notification_thread_handle, creds.uid.value, &triggers); |
b69a1b40 JG |
1334 | if (ret_code != LTTNG_OK) { |
1335 | ERR("Failed to list triggers while unregistering all triggers"); | |
1336 | goto end; | |
1337 | } | |
1338 | ||
1339 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
a0377dfe | 1340 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
b69a1b40 JG |
1341 | |
1342 | for (i = 0; i < trigger_count; i++) { | |
b69a1b40 JG |
1343 | uid_t trigger_owner; |
1344 | const char *trigger_name; | |
28ab034a | 1345 | const struct lttng_trigger *trigger = lttng_triggers_get_at_index(triggers, i); |
b69a1b40 | 1346 | |
a0377dfe | 1347 | LTTNG_ASSERT(trigger); |
b69a1b40 | 1348 | |
28ab034a | 1349 | trigger_status = lttng_trigger_get_owner_uid(trigger, &trigger_owner); |
a0377dfe | 1350 | LTTNG_ASSERT(trigger_status == LTTNG_TRIGGER_STATUS_OK); |
b69a1b40 JG |
1351 | |
1352 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
28ab034a JG |
1353 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? trigger_name : |
1354 | "(anonymous)"; | |
b69a1b40 JG |
1355 | |
1356 | DBG("Unregistering trigger: trigger owner uid = %d, trigger name = '%s'", | |
28ab034a JG |
1357 | (int) trigger_owner, |
1358 | trigger_name); | |
b69a1b40 | 1359 | |
28ab034a | 1360 | ret_code = cmd_unregister_trigger(&creds, trigger, the_notification_thread_handle); |
b69a1b40 JG |
1361 | if (ret_code != LTTNG_OK) { |
1362 | ERR("Failed to unregister trigger: trigger owner uid = %d, trigger name = '%s', error: '%s'", | |
28ab034a JG |
1363 | (int) trigger_owner, |
1364 | trigger_name, | |
1365 | lttng_strerror(-ret_code)); | |
b69a1b40 JG |
1366 | /* Continue to unregister the remaining triggers. */ |
1367 | } | |
1368 | } | |
1369 | end: | |
1370 | lttng_triggers_destroy(triggers); | |
1371 | } | |
1372 | ||
929f71ec JG |
1373 | static int run_as_worker_post_fork_cleanup(void *data) |
1374 | { | |
7966af57 | 1375 | struct sessiond_config *sessiond_config = (struct sessiond_config *) data; |
929f71ec JG |
1376 | |
1377 | sessiond_config_fini(sessiond_config); | |
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | static int launch_run_as_worker(const char *procname) | |
1382 | { | |
1383 | /* | |
1384 | * Clean-up before forking the run-as worker. Any dynamically | |
1385 | * allocated memory of which the worker is not aware will | |
1386 | * be leaked as the process forks a run-as worker (and performs | |
1387 | * no exec*()). The same would apply to any opened fd. | |
1388 | */ | |
28ab034a | 1389 | return run_as_create_worker(procname, run_as_worker_post_fork_cleanup, &the_config); |
929f71ec JG |
1390 | } |
1391 | ||
cd9adb8b | 1392 | static void sessiond_uuid_log() |
52a0e931 | 1393 | { |
c70636a7 | 1394 | char uuid_str[LTTNG_UUID_STR_LEN]; |
52a0e931 | 1395 | |
412d7227 | 1396 | lttng_uuid_to_str(the_sessiond_uuid, uuid_str); |
52a0e931 JG |
1397 | DBG("Starting lttng-sessiond {%s}", uuid_str); |
1398 | } | |
1399 | ||
fac6795d DG |
1400 | /* |
1401 | * main | |
1402 | */ | |
64f8e493 | 1403 | static int _main(int argc, char **argv) |
fac6795d | 1404 | { |
4a15001e | 1405 | int ret = 0, retval = 0; |
e6142f2e | 1406 | const char *env_app_timeout; |
cd9adb8b JG |
1407 | struct lttng_pipe *ust32_channel_monitor_pipe = nullptr, |
1408 | *ust64_channel_monitor_pipe = nullptr, | |
1409 | *kernel_channel_monitor_pipe = nullptr; | |
bc26e826 | 1410 | struct timer_thread_parameters timer_thread_parameters; |
d086f507 | 1411 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
0038180d | 1412 | lttng::sessiond::rotation_thread_timer_queue *rotation_timer_queue = nullptr; |
cd9adb8b JG |
1413 | struct lttng_thread *client_thread = nullptr; |
1414 | struct lttng_thread *notification_thread = nullptr; | |
1415 | struct lttng_thread *register_apps_thread = nullptr; | |
761ffce2 | 1416 | enum event_notifier_error_accounting_status event_notifier_error_accounting_status; |
fac6795d | 1417 | |
f5fb86c1 | 1418 | logger_set_thread_name("Main", false); |
335a95b7 MD |
1419 | init_kernel_workarounds(); |
1420 | ||
f6a9efaa DG |
1421 | rcu_register_thread(); |
1422 | ||
4a15001e MD |
1423 | if (set_signal_handler()) { |
1424 | retval = -1; | |
1425 | goto exit_set_signal_handler; | |
0bb7724a DG |
1426 | } |
1427 | ||
92816cc3 | 1428 | if (timer_signal_init()) { |
d086f507 JD |
1429 | retval = -1; |
1430 | goto exit_set_signal_handler; | |
1431 | } | |
1432 | ||
81663f07 | 1433 | the_page_size = sysconf(_SC_PAGE_SIZE); |
412d7227 | 1434 | if (the_page_size < 0) { |
81663f07 | 1435 | PERROR("sysconf _SC_PAGE_SIZE"); |
412d7227 SM |
1436 | the_page_size = LONG_MAX; |
1437 | WARN("Fallback page size to %ld", the_page_size); | |
12744796 DG |
1438 | } |
1439 | ||
412d7227 | 1440 | ret = sessiond_config_init(&the_config); |
e6142f2e JG |
1441 | if (ret) { |
1442 | retval = -1; | |
1443 | goto exit_set_signal_handler; | |
1444 | } | |
1445 | ||
2788b494 JR |
1446 | /* |
1447 | * Init config from environment variables. | |
1448 | * Command line option override env configuration per-doc. Do env first. | |
1449 | */ | |
412d7227 | 1450 | sessiond_config_apply_env_config(&the_config); |
2788b494 | 1451 | |
4a15001e MD |
1452 | /* |
1453 | * Parse arguments and load the daemon configuration file. | |
1454 | * | |
1455 | * We have an exit_options exit path to free memory reserved by | |
3c339053 | 1456 | * set_options. |
4a15001e | 1457 | */ |
fac6795d | 1458 | progname = argv[0]; |
4a15001e MD |
1459 | if (set_options(argc, argv)) { |
1460 | retval = -1; | |
1461 | goto exit_options; | |
fac6795d DG |
1462 | } |
1463 | ||
e6142f2e JG |
1464 | /* |
1465 | * Resolve all paths received as arguments, configuration option, or | |
1466 | * through environment variable as absolute paths. This is necessary | |
1467 | * since daemonizing causes the sessiond's current working directory | |
1468 | * to '/'. | |
1469 | */ | |
412d7227 | 1470 | ret = sessiond_config_resolve_paths(&the_config); |
e6142f2e JG |
1471 | if (ret) { |
1472 | goto exit_options; | |
1473 | } | |
1474 | ||
1475 | /* Apply config. */ | |
412d7227 SM |
1476 | lttng_opt_verbose = the_config.verbose; |
1477 | lttng_opt_quiet = the_config.quiet; | |
28ab034a JG |
1478 | the_kconsumer_data.err_unix_sock_path = the_config.kconsumerd_err_unix_sock_path.value; |
1479 | the_kconsumer_data.cmd_unix_sock_path = the_config.kconsumerd_cmd_unix_sock_path.value; | |
1480 | the_ustconsumer32_data.err_unix_sock_path = the_config.consumerd32_err_unix_sock_path.value; | |
1481 | the_ustconsumer32_data.cmd_unix_sock_path = the_config.consumerd32_cmd_unix_sock_path.value; | |
1482 | the_ustconsumer64_data.err_unix_sock_path = the_config.consumerd64_err_unix_sock_path.value; | |
1483 | the_ustconsumer64_data.cmd_unix_sock_path = the_config.consumerd64_cmd_unix_sock_path.value; | |
e6142f2e JG |
1484 | set_clock_plugin_env(); |
1485 | ||
412d7227 | 1486 | sessiond_config_log(&the_config); |
52a0e931 | 1487 | sessiond_uuid_log(); |
e35e95ea | 1488 | lttng::logging::log_system_information(PRINT_DBG); |
e6142f2e | 1489 | |
a3bc3918 JR |
1490 | if (opt_print_version) { |
1491 | print_version(); | |
1492 | retval = 0; | |
1493 | goto exit_options; | |
1494 | } | |
1495 | ||
f472090a JG |
1496 | if (create_lttng_rundir()) { |
1497 | retval = -1; | |
1498 | goto exit_options; | |
1499 | } | |
1500 | ||
1501 | /* Abort launch if a session daemon is already running. */ | |
1502 | if (check_existing_daemon()) { | |
1503 | ERR("A session daemon is already running."); | |
1504 | retval = -1; | |
1505 | goto exit_options; | |
1506 | } | |
1507 | ||
fac6795d | 1508 | /* Daemonize */ |
412d7227 | 1509 | if (the_config.daemonize || the_config.background) { |
ceed52b5 MD |
1510 | int i; |
1511 | ||
28ab034a | 1512 | ret = lttng_daemonize(&the_child_ppid, &recv_child_signal, !the_config.background); |
53094c05 | 1513 | if (ret < 0) { |
4a15001e MD |
1514 | retval = -1; |
1515 | goto exit_options; | |
53094c05 | 1516 | } |
0bb7724a | 1517 | |
ceed52b5 | 1518 | /* |
0bb7724a | 1519 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 1520 | * closed, in case we are called with more opened file |
f472090a | 1521 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
1522 | */ |
1523 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
1524 | if (i == lockfile_fd) { |
1525 | continue; | |
1526 | } | |
ceed52b5 MD |
1527 | (void) close(i); |
1528 | } | |
1529 | } | |
1530 | ||
929f71ec | 1531 | if (launch_run_as_worker(argv[0]) < 0) { |
7567352f MD |
1532 | goto exit_create_run_as_worker_cleanup; |
1533 | } | |
1534 | ||
4a15001e MD |
1535 | /* |
1536 | * Starting from here, we can create threads. This needs to be after | |
1537 | * lttng_daemonize due to RCU. | |
1538 | */ | |
1539 | ||
1540 | /* | |
1541 | * Initialize the health check subsystem. This call should set the | |
1542 | * appropriate time values. | |
1543 | */ | |
412d7227 SM |
1544 | the_health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
1545 | if (!the_health_sessiond) { | |
4a15001e MD |
1546 | PERROR("health_app_create error"); |
1547 | retval = -1; | |
0d64e8fb | 1548 | goto stop_threads; |
4a15001e MD |
1549 | } |
1550 | ||
f90a04ed MJ |
1551 | /* Create main quit pipe */ |
1552 | if (sessiond_init_main_quit_pipe()) { | |
4a15001e | 1553 | retval = -1; |
0d64e8fb | 1554 | goto stop_threads; |
fac6795d DG |
1555 | } |
1556 | ||
1557 | /* Check if daemon is UID = 0 */ | |
1558 | is_root = !getuid(); | |
fac6795d | 1559 | if (is_root) { |
67e40797 | 1560 | /* Create global run dir with root access */ |
67e40797 | 1561 | |
b3530820 JG |
1562 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
1563 | if (!kernel_channel_monitor_pipe) { | |
1564 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
1565 | retval = -1; | |
0d64e8fb | 1566 | goto stop_threads; |
b3530820 | 1567 | } |
412d7227 | 1568 | the_kconsumer_data.channel_monitor_pipe = |
28ab034a | 1569 | lttng_pipe_release_writefd(kernel_channel_monitor_pipe); |
412d7227 | 1570 | if (the_kconsumer_data.channel_monitor_pipe < 0) { |
b3530820 | 1571 | retval = -1; |
0d64e8fb | 1572 | goto stop_threads; |
b3530820 | 1573 | } |
fac6795d DG |
1574 | } |
1575 | ||
5c827ce0 | 1576 | /* Set consumer initial state */ |
412d7227 SM |
1577 | the_kernel_consumerd_state = CONSUMER_STOPPED; |
1578 | the_ust_consumerd_state = CONSUMER_STOPPED; | |
5c827ce0 | 1579 | |
b3530820 JG |
1580 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
1581 | if (!ust32_channel_monitor_pipe) { | |
1582 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
1583 | retval = -1; | |
0d64e8fb | 1584 | goto stop_threads; |
b3530820 | 1585 | } |
412d7227 | 1586 | the_ustconsumer32_data.channel_monitor_pipe = |
28ab034a | 1587 | lttng_pipe_release_writefd(ust32_channel_monitor_pipe); |
412d7227 | 1588 | if (the_ustconsumer32_data.channel_monitor_pipe < 0) { |
b3530820 | 1589 | retval = -1; |
0d64e8fb | 1590 | goto stop_threads; |
b3530820 | 1591 | } |
62c43103 | 1592 | |
d086f507 | 1593 | /* |
92816cc3 JG |
1594 | * The rotation_thread_timer_queue structure is shared between the |
1595 | * sessiond timer thread and the rotation thread. The main thread keeps | |
1596 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 1597 | */ |
0038180d | 1598 | rotation_timer_queue = lttng::sessiond::rotation_thread_timer_queue_create(); |
d086f507 JD |
1599 | if (!rotation_timer_queue) { |
1600 | retval = -1; | |
0d64e8fb | 1601 | goto stop_threads; |
d086f507 | 1602 | } |
28ab034a | 1603 | timer_thread_parameters.rotation_thread_job_queue = rotation_timer_queue; |
67e40797 | 1604 | |
b3530820 JG |
1605 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
1606 | if (!ust64_channel_monitor_pipe) { | |
1607 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
1608 | retval = -1; | |
0d64e8fb | 1609 | goto stop_threads; |
b3530820 | 1610 | } |
412d7227 | 1611 | the_ustconsumer64_data.channel_monitor_pipe = |
28ab034a | 1612 | lttng_pipe_release_writefd(ust64_channel_monitor_pipe); |
412d7227 | 1613 | if (the_ustconsumer64_data.channel_monitor_pipe < 0) { |
b3530820 | 1614 | retval = -1; |
0d64e8fb | 1615 | goto stop_threads; |
b3530820 | 1616 | } |
847177cd | 1617 | |
1427f9b2 DG |
1618 | /* |
1619 | * Init UST app hash table. Alloc hash table before this point since | |
1620 | * cleanup() can get called after that point. | |
1621 | */ | |
4a15001e | 1622 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 1623 | ERR("Failed to allocate UST app hash table"); |
4a15001e | 1624 | retval = -1; |
0d64e8fb | 1625 | goto stop_threads; |
4a15001e | 1626 | } |
1427f9b2 | 1627 | |
761ffce2 | 1628 | event_notifier_error_accounting_status = event_notifier_error_accounting_init( |
28ab034a JG |
1629 | the_config.event_notifier_buffer_size_kernel, |
1630 | the_config.event_notifier_buffer_size_userspace); | |
761ffce2 FD |
1631 | if (event_notifier_error_accounting_status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { |
1632 | ERR("Failed to initialize event notifier error accounting system"); | |
1633 | retval = -1; | |
1634 | goto stop_threads; | |
1635 | } | |
90aa04a1 | 1636 | |
6a4e4039 JG |
1637 | /* |
1638 | * Initialize agent app hash table. We allocate the hash table here | |
1639 | * since cleanup() can get called after this point. | |
1640 | */ | |
1641 | if (agent_app_ht_alloc()) { | |
1642 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e | 1643 | retval = -1; |
0d64e8fb | 1644 | goto stop_threads; |
f20baf8e DG |
1645 | } |
1646 | ||
44760c20 JR |
1647 | if (agent_by_event_notifier_domain_ht_create()) { |
1648 | ERR("Failed to allocate per-event notifier domain agent hash table"); | |
1649 | retval = -1; | |
1650 | goto stop_threads; | |
1651 | } | |
a88df331 DG |
1652 | /* |
1653 | * These actions must be executed as root. We do that *after* setting up | |
1654 | * the sockets path because we MUST make the check for another daemon using | |
1655 | * those paths *before* trying to set the kernel consumer sockets and init | |
1656 | * kernel tracer. | |
1657 | */ | |
1658 | if (is_root) { | |
412d7227 | 1659 | if (set_consumer_sockets(&the_kconsumer_data)) { |
4a15001e | 1660 | retval = -1; |
0d64e8fb | 1661 | goto stop_threads; |
7753dea8 MD |
1662 | } |
1663 | ||
a88df331 | 1664 | /* Setup kernel tracer */ |
412d7227 | 1665 | if (!the_config.no_kernel) { |
4fba7219 DG |
1666 | init_kernel_tracer(); |
1667 | } | |
a88df331 DG |
1668 | |
1669 | /* Set ulimit for open files */ | |
1670 | set_ulimit(); | |
fac6795d | 1671 | } |
4063050c MD |
1672 | /* init lttng_fd tracking must be done after set_ulimit. */ |
1673 | lttng_fd_init(); | |
fac6795d | 1674 | |
412d7227 | 1675 | if (set_consumer_sockets(&the_ustconsumer64_data)) { |
4a15001e | 1676 | retval = -1; |
0d64e8fb | 1677 | goto stop_threads; |
67e40797 DG |
1678 | } |
1679 | ||
412d7227 | 1680 | if (set_consumer_sockets(&the_ustconsumer32_data)) { |
4a15001e | 1681 | retval = -1; |
0d64e8fb | 1682 | goto stop_threads; |
67e40797 DG |
1683 | } |
1684 | ||
5b8719f5 | 1685 | /* Get parent pid if -S, --sig-parent is specified. */ |
412d7227 SM |
1686 | if (the_config.sig_parent) { |
1687 | the_ppid = getppid(); | |
5b8719f5 DG |
1688 | } |
1689 | ||
7a485870 | 1690 | /* Setup the kernel pipe for waking up the kernel thread */ |
412d7227 SM |
1691 | if (is_root && !the_config.no_kernel) { |
1692 | if (utils_create_pipe_cloexec(the_kernel_poll_pipe)) { | |
4a15001e | 1693 | retval = -1; |
0d64e8fb | 1694 | goto stop_threads; |
6620da75 | 1695 | } |
7a485870 DG |
1696 | } |
1697 | ||
099e26bd | 1698 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
1699 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
1700 | retval = -1; | |
0d64e8fb | 1701 | goto stop_threads; |
099e26bd DG |
1702 | } |
1703 | ||
d0b96690 | 1704 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
1705 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
1706 | retval = -1; | |
0d64e8fb | 1707 | goto stop_threads; |
d0b96690 DG |
1708 | } |
1709 | ||
7972aab2 DG |
1710 | /* Initialize global buffer per UID and PID registry. */ |
1711 | buffer_reg_init_uid_registry(); | |
1712 | buffer_reg_init_pid_registry(); | |
1713 | ||
099e26bd | 1714 | /* Init UST command queue. */ |
8bdee6e2 | 1715 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1716 | |
2f77fc4b | 1717 | cmd_init(); |
00e2e675 | 1718 | |
ae9e45b3 DG |
1719 | /* Check for the application socket timeout env variable. */ |
1720 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
1721 | if (env_app_timeout) { | |
412d7227 | 1722 | the_config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 1723 | } else { |
412d7227 | 1724 | the_config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
1725 | } |
1726 | ||
4a15001e MD |
1727 | ret = write_pidfile(); |
1728 | if (ret) { | |
1729 | ERR("Error in write_pidfile"); | |
1730 | retval = -1; | |
0d64e8fb | 1731 | goto stop_threads; |
4a15001e | 1732 | } |
35f90c40 | 1733 | |
554831e7 MD |
1734 | /* Initialize communication library */ |
1735 | lttcomm_init(); | |
4a15001e | 1736 | /* Initialize TCP timeout values */ |
d831c249 | 1737 | lttcomm_inet_init(); |
554831e7 | 1738 | |
12b4fb37 | 1739 | /* Create health-check thread. */ |
173fca4f | 1740 | if (!launch_health_management_thread()) { |
4a15001e | 1741 | retval = -1; |
0d64e8fb | 1742 | goto stop_threads; |
44a5e5eb DG |
1743 | } |
1744 | ||
b3530820 | 1745 | /* notification_thread_data acquires the pipes' read side. */ |
28ab034a JG |
1746 | the_notification_thread_handle = |
1747 | notification_thread_handle_create(ust32_channel_monitor_pipe, | |
1748 | ust64_channel_monitor_pipe, | |
1749 | kernel_channel_monitor_pipe); | |
412d7227 | 1750 | if (!the_notification_thread_handle) { |
b3530820 JG |
1751 | retval = -1; |
1752 | ERR("Failed to create notification thread shared data"); | |
0d64e8fb | 1753 | goto stop_threads; |
b3530820 JG |
1754 | } |
1755 | ||
1756 | /* Create notification thread. */ | |
28ab034a | 1757 | notification_thread = launch_notification_thread(the_notification_thread_handle); |
4a91420c | 1758 | if (!notification_thread) { |
b3530820 | 1759 | retval = -1; |
0d64e8fb | 1760 | goto stop_threads; |
b3530820 JG |
1761 | } |
1762 | ||
d086f507 | 1763 | /* Create timer thread. */ |
bc26e826 | 1764 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 1765 | retval = -1; |
0d64e8fb | 1766 | goto stop_threads; |
d086f507 | 1767 | } |
d086f507 | 1768 | |
0038180d | 1769 | try { |
28f23191 JG |
1770 | the_rotation_thread_handle = lttng::make_unique<lttng::sessiond::rotation_thread>( |
1771 | *rotation_timer_queue, *the_notification_thread_handle); | |
0038180d | 1772 | } catch (const std::exception& e) { |
db66e574 | 1773 | retval = -1; |
0038180d | 1774 | ERR("Failed to create rotation thread: %s", e.what()); |
0d64e8fb | 1775 | goto stop_threads; |
db66e574 | 1776 | } |
db66e574 | 1777 | |
0038180d JG |
1778 | try { |
1779 | the_rotation_thread_handle->launch_thread(); | |
1780 | } catch (const std::exception& e) { | |
db66e574 | 1781 | retval = -1; |
0038180d | 1782 | ERR("Failed to launch rotation thread: %s", e.what()); |
0d64e8fb | 1783 | goto stop_threads; |
db66e574 JD |
1784 | } |
1785 | ||
cf3af59e | 1786 | /* Create thread to manage the client socket */ |
917a718d JG |
1787 | client_thread = launch_client_thread(); |
1788 | if (!client_thread) { | |
4a15001e | 1789 | retval = -1; |
0d64e8fb | 1790 | goto stop_threads; |
cf3af59e | 1791 | } |
fac6795d | 1792 | |
308df7bb | 1793 | /* Set credentials of the client socket and rundir */ |
412d7227 | 1794 | if (is_root && set_permissions(the_config.rundir.value)) { |
308df7bb JG |
1795 | retval = -1; |
1796 | goto stop_threads; | |
1797 | } | |
1798 | ||
28ab034a | 1799 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], apps_cmd_notify_pipe[1])) { |
4a15001e | 1800 | retval = -1; |
0d64e8fb | 1801 | goto stop_threads; |
099e26bd DG |
1802 | } |
1803 | ||
1804 | /* Create thread to manage application registration. */ | |
28ab034a | 1805 | register_apps_thread = launch_application_registration_thread(&ust_cmd_queue); |
bd9addf7 | 1806 | if (!register_apps_thread) { |
4a15001e | 1807 | retval = -1; |
0d64e8fb | 1808 | goto stop_threads; |
099e26bd DG |
1809 | } |
1810 | ||
cf3af59e | 1811 | /* Create thread to manage application socket */ |
7649924e | 1812 | if (!launch_application_management_thread(apps_cmd_pipe[0])) { |
4a15001e | 1813 | retval = -1; |
0d64e8fb | 1814 | goto stop_threads; |
d0b96690 DG |
1815 | } |
1816 | ||
1817 | /* Create thread to manage application notify socket */ | |
971a61c6 | 1818 | if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) { |
4a15001e | 1819 | retval = -1; |
0d64e8fb | 1820 | goto stop_threads; |
cf3af59e | 1821 | } |
fac6795d | 1822 | |
8a7e4590 JG |
1823 | /* Create agent management thread. */ |
1824 | if (!launch_agent_management_thread()) { | |
4a15001e | 1825 | retval = -1; |
0d64e8fb | 1826 | goto stop_threads; |
4d076222 DG |
1827 | } |
1828 | ||
6620da75 | 1829 | /* Don't start this thread if kernel tracing is not requested nor root */ |
412d7227 | 1830 | if (is_root && !the_config.no_kernel) { |
6620da75 | 1831 | /* Create kernel thread to manage kernel event */ |
412d7227 | 1832 | if (!launch_kernel_management_thread(the_kernel_poll_pipe[0])) { |
4a15001e | 1833 | retval = -1; |
0d64e8fb | 1834 | goto stop_threads; |
6620da75 | 1835 | } |
352b58f5 JR |
1836 | |
1837 | if (kernel_get_notification_fd() >= 0) { | |
1838 | ret = notification_thread_command_add_tracer_event_source( | |
28ab034a JG |
1839 | the_notification_thread_handle, |
1840 | kernel_get_notification_fd(), | |
1841 | LTTNG_DOMAIN_KERNEL); | |
352b58f5 JR |
1842 | if (ret != LTTNG_OK) { |
1843 | ERR("Failed to add kernel trigger event source to notification thread"); | |
1844 | retval = -1; | |
1845 | goto stop_threads; | |
1846 | } | |
1847 | } | |
ef367a93 | 1848 | } |
7a485870 | 1849 | |
3316b9d6 | 1850 | /* Load sessions. */ |
cd9adb8b | 1851 | ret = config_load_session(the_config.load_session_path.value, nullptr, 1, 1, nullptr); |
4a15001e | 1852 | if (ret) { |
3316b9d6 | 1853 | ERR("Session load failed: %s", error_get_str(ret)); |
4a15001e | 1854 | retval = -1; |
0d64e8fb | 1855 | goto stop_threads; |
4a15001e MD |
1856 | } |
1857 | ||
3316b9d6 JG |
1858 | /* Initialization completed. */ |
1859 | sessiond_signal_parents(); | |
1860 | ||
4a15001e MD |
1861 | /* |
1862 | * This is where we start awaiting program completion (e.g. through | |
1863 | * signal that asks threads to teardown). | |
1864 | */ | |
1865 | ||
f90a04ed MJ |
1866 | /* Initiate teardown once activity occurs on the main quit pipe. */ |
1867 | sessiond_wait_for_main_quit_pipe(-1); | |
917a718d | 1868 | |
0d64e8fb | 1869 | stop_threads: |
90aa04a1 | 1870 | |
f90a04ed MJ |
1871 | DBG("Terminating all threads"); |
1872 | ||
917a718d JG |
1873 | /* |
1874 | * Ensure that the client thread is no longer accepting new commands, | |
1875 | * which could cause new sessions to be created. | |
1876 | */ | |
0d64e8fb JG |
1877 | if (client_thread) { |
1878 | lttng_thread_shutdown(client_thread); | |
917a718d | 1879 | lttng_thread_put(client_thread); |
917a718d JG |
1880 | } |
1881 | ||
99d688f2 | 1882 | destroy_all_sessions_and_wait(); |
0d64e8fb | 1883 | |
b69a1b40 JG |
1884 | /* |
1885 | * At this point no new trigger can be registered (no sessions are | |
1886 | * running/rotating) and clients can't connect to the session daemon | |
1887 | * anymore. Unregister all triggers. | |
1888 | */ | |
1889 | unregister_all_triggers(); | |
1890 | ||
bd9addf7 JG |
1891 | if (register_apps_thread) { |
1892 | lttng_thread_shutdown(register_apps_thread); | |
1893 | lttng_thread_put(register_apps_thread); | |
1894 | } | |
a3707772 | 1895 | lttng_thread_list_shutdown_orphans(); |
917a718d | 1896 | |
4d62fbf8 MD |
1897 | /* |
1898 | * Wait for all pending call_rcu work to complete before tearing | |
1899 | * down data structures. call_rcu worker may be trying to | |
1900 | * perform lookups in those structures. | |
1901 | */ | |
1902 | rcu_barrier(); | |
3c339053 | 1903 | |
4a15001e MD |
1904 | rcu_thread_online(); |
1905 | sessiond_cleanup(); | |
06f525de | 1906 | |
3b8a092f | 1907 | /* |
1d25334c | 1908 | * Wait for all pending call_rcu work to complete before shutting down |
3b8a092f FD |
1909 | * the notification thread. This call_rcu work includes shutting down |
1910 | * UST apps and event notifier pipes. | |
1911 | */ | |
1912 | rcu_barrier(); | |
1913 | ||
4a91420c JG |
1914 | if (notification_thread) { |
1915 | lttng_thread_shutdown(notification_thread); | |
1916 | lttng_thread_put(notification_thread); | |
1917 | } | |
1918 | ||
90aa04a1 | 1919 | /* |
1d25334c FD |
1920 | * Error accounting teardown has to be done after the teardown of all |
1921 | * event notifier pipes to ensure that no tracer may try to use the | |
1922 | * error accounting facilities. | |
90aa04a1 FD |
1923 | */ |
1924 | event_notifier_error_accounting_fini(); | |
1925 | ||
1d25334c FD |
1926 | /* |
1927 | * Unloading the kernel modules needs to be done after all kernel | |
1928 | * ressources have been released. In our case, this includes the | |
1929 | * notification fd, the event notifier group fd, error accounting fd, | |
1930 | * all event and event notifier fds, etc. | |
1931 | * | |
1932 | * In short, at this point, we need to have called close() on all fds | |
1933 | * received from the kernel tracer. | |
1934 | */ | |
412d7227 | 1935 | if (is_root && !the_config.no_kernel) { |
1d25334c | 1936 | DBG("Unloading kernel modules"); |
28ab034a | 1937 | modprobe_remove_lttng_all(); |
1d25334c FD |
1938 | } |
1939 | ||
64d9b072 JG |
1940 | rcu_thread_offline(); |
1941 | rcu_unregister_thread(); | |
1942 | ||
d086f507 JD |
1943 | /* |
1944 | * After the rotation and timer thread have quit, we can safely destroy | |
1945 | * the rotation_timer_queue. | |
1946 | */ | |
92816cc3 | 1947 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
c8a9de5a JG |
1948 | /* |
1949 | * The teardown of the notification system is performed after the | |
1950 | * session daemon's teardown in order to allow it to be notified | |
1951 | * of the active session and channels at the moment of the teardown. | |
1952 | */ | |
412d7227 | 1953 | if (the_notification_thread_handle) { |
28ab034a | 1954 | notification_thread_handle_destroy(the_notification_thread_handle); |
c8a9de5a | 1955 | } |
b3530820 JG |
1956 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
1957 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
1958 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
4a15001e | 1959 | |
412d7227 SM |
1960 | if (the_health_sessiond) { |
1961 | health_app_destroy(the_health_sessiond); | |
9bc2ec5f | 1962 | } |
7567352f | 1963 | exit_create_run_as_worker_cleanup: |
4a15001e | 1964 | exit_options: |
f472090a | 1965 | sessiond_cleanup_lock_file(); |
4a15001e MD |
1966 | sessiond_cleanup_options(); |
1967 | ||
1968 | exit_set_signal_handler: | |
1969 | if (!retval) { | |
cf3af59e | 1970 | exit(EXIT_SUCCESS); |
4a15001e MD |
1971 | } else { |
1972 | exit(EXIT_FAILURE); | |
67e40797 | 1973 | } |
fac6795d | 1974 | } |
64f8e493 JG |
1975 | |
1976 | int main(int argc, char **argv) | |
1977 | { | |
1978 | try { | |
1979 | return _main(argc, argv); | |
1980 | } catch (const std::exception& e) { | |
ae26b182 | 1981 | ERR_FMT("Unhandled exception caught by main thread: {}", e.what()); |
64f8e493 JG |
1982 | abort(); |
1983 | } | |
1984 | } |