Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
90c106c6 | 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 |
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> |
f9431861 | 40 | #include <common/lockfile.h> |
4b082b12 | 41 | #include <common/path.h> |
3ccdf997 | 42 | #include <common/daemonize.h> |
f40ef1d5 | 43 | #include <common/config/session-config.h> |
dcabc190 | 44 | #include <common/dynamic-buffer.h> |
76fcf151 | 45 | #include <lttng/event-internal.h> |
fac6795d | 46 | |
10a8a223 | 47 | #include "lttng-sessiond.h" |
7972aab2 | 48 | #include "buffer-registry.h" |
54d01ffb | 49 | #include "channel.h" |
2f77fc4b | 50 | #include "cmd.h" |
00e2e675 | 51 | #include "consumer.h" |
099e26bd | 52 | #include "context.h" |
54d01ffb | 53 | #include "event.h" |
90aa04a1 | 54 | #include "event-notifier-error-accounting.h" |
4771f025 | 55 | #include "kernel.h" |
f1e16794 | 56 | #include "kernel-consumer.h" |
75018ab6 | 57 | #include "lttng-ust-ctl.h" |
00e2e675 | 58 | #include "ust-consumer.h" |
8e68d1c8 | 59 | #include "utils.h" |
4063050c | 60 | #include "fd-limit.h" |
8782cc74 | 61 | #include "health-sessiond.h" |
8ac94142 | 62 | #include "testpoint.h" |
f9d2ba6a | 63 | #include "notify-apps.h" |
022d91ba | 64 | #include "agent-thread.h" |
fb198a11 | 65 | #include "save.h" |
b3530820 JG |
66 | #include "notification-thread.h" |
67 | #include "notification-thread-commands.h" | |
db66e574 | 68 | #include "rotation-thread.h" |
7c1d2758 | 69 | #include "agent.h" |
5e97de00 | 70 | #include "ht-cleanup.h" |
e6142f2e | 71 | #include "sessiond-config.h" |
8e319828 | 72 | #include "timer.h" |
a3707772 | 73 | #include "thread.h" |
917a718d | 74 | #include "client.h" |
5d1b0219 | 75 | #include "dispatch.h" |
1785d7f2 | 76 | #include "register.h" |
7649924e | 77 | #include "manage-apps.h" |
5b093681 | 78 | #include "manage-kernel.h" |
1d25334c | 79 | #include "modprobe.h" |
d85707b0 | 80 | #include "ust-sigbus.h" |
ebaeda94 | 81 | |
4fc83d94 PP |
82 | static const char *help_msg = |
83 | #ifdef LTTNG_EMBED_HELP | |
84 | #include <lttng-sessiond.8.h> | |
85 | #else | |
86 | NULL | |
87 | #endif | |
88 | ; | |
89 | ||
90aa04a1 | 90 | #define EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX 65535 |
761ffce2 FD |
91 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR \ |
92 | "event-notifier-error-buffer-size" | |
93 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR \ | |
94 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR "-kernel" | |
95 | #define EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR \ | |
96 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_BASE_OPTION_STR "-userspace" | |
97 | ||
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[] = { | |
0f5ea17c JG |
108 | { "client-sock", required_argument, 0, 'c' }, |
109 | { "apps-sock", required_argument, 0, 'a' }, | |
110 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
111 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
112 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
113 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
114 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
115 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
116 | { "consumerd32-path", required_argument, 0, '\0' }, | |
117 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
118 | { "consumerd64-path", required_argument, 0, '\0' }, | |
119 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
120 | { "daemonize", no_argument, 0, 'd' }, | |
121 | { "background", no_argument, 0, 'b' }, | |
122 | { "sig-parent", no_argument, 0, 'S' }, | |
123 | { "help", no_argument, 0, 'h' }, | |
124 | { "group", required_argument, 0, 'g' }, | |
125 | { "version", no_argument, 0, 'V' }, | |
126 | { "quiet", no_argument, 0, 'q' }, | |
127 | { "verbose", no_argument, 0, 'v' }, | |
128 | { "verbose-consumer", no_argument, 0, '\0' }, | |
129 | { "no-kernel", no_argument, 0, '\0' }, | |
130 | { "pidfile", required_argument, 0, 'p' }, | |
131 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
132 | { "config", required_argument, 0, 'f' }, | |
133 | { "load", required_argument, 0, 'l' }, | |
134 | { "kmod-probes", required_argument, 0, '\0' }, | |
135 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
761ffce2 FD |
136 | { EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, required_argument, 0, '\0' }, |
137 | { EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, required_argument, 0, '\0' }, | |
26296c48 JG |
138 | { NULL, 0, 0, 0 } |
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 | */ |
a7333da7 | 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 DG |
170 | /* |
171 | * Stop all threads by closing the thread quit pipe. | |
172 | */ | |
cf3af59e MD |
173 | static void stop_threads(void) |
174 | { | |
5eb91c98 DG |
175 | int ret; |
176 | ||
cf3af59e MD |
177 | /* Stopping all threads */ |
178 | DBG("Terminating all threads"); | |
a7333da7 | 179 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
180 | if (ret < 0) { |
181 | ERR("write error on thread quit pipe"); | |
182 | } | |
cf3af59e MD |
183 | } |
184 | ||
e975f9f8 DG |
185 | /* |
186 | * Close every consumer sockets. | |
187 | */ | |
188 | static void close_consumer_sockets(void) | |
189 | { | |
190 | int ret; | |
191 | ||
412d7227 SM |
192 | if (the_kconsumer_data.err_sock >= 0) { |
193 | ret = close(the_kconsumer_data.err_sock); | |
e975f9f8 DG |
194 | if (ret < 0) { |
195 | PERROR("kernel consumer err_sock close"); | |
196 | } | |
197 | } | |
412d7227 SM |
198 | if (the_ustconsumer32_data.err_sock >= 0) { |
199 | ret = close(the_ustconsumer32_data.err_sock); | |
e975f9f8 | 200 | if (ret < 0) { |
a76cbd9f | 201 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
202 | } |
203 | } | |
412d7227 SM |
204 | if (the_ustconsumer64_data.err_sock >= 0) { |
205 | ret = close(the_ustconsumer64_data.err_sock); | |
e975f9f8 | 206 | if (ret < 0) { |
a76cbd9f | 207 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
208 | } |
209 | } | |
412d7227 SM |
210 | if (the_kconsumer_data.cmd_sock >= 0) { |
211 | ret = close(the_kconsumer_data.cmd_sock); | |
e975f9f8 DG |
212 | if (ret < 0) { |
213 | PERROR("kernel consumer cmd_sock close"); | |
214 | } | |
215 | } | |
412d7227 SM |
216 | if (the_ustconsumer32_data.cmd_sock >= 0) { |
217 | ret = close(the_ustconsumer32_data.cmd_sock); | |
e975f9f8 | 218 | if (ret < 0) { |
a76cbd9f | 219 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
220 | } |
221 | } | |
412d7227 SM |
222 | if (the_ustconsumer64_data.cmd_sock >= 0) { |
223 | ret = close(the_ustconsumer64_data.cmd_sock); | |
e975f9f8 | 224 | if (ret < 0) { |
a76cbd9f | 225 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
226 | } |
227 | } | |
412d7227 SM |
228 | if (the_kconsumer_data.channel_monitor_pipe >= 0) { |
229 | ret = close(the_kconsumer_data.channel_monitor_pipe); | |
b3530820 JG |
230 | if (ret < 0) { |
231 | PERROR("kernel consumer channel monitor pipe close"); | |
232 | } | |
233 | } | |
412d7227 SM |
234 | if (the_ustconsumer32_data.channel_monitor_pipe >= 0) { |
235 | ret = close(the_ustconsumer32_data.channel_monitor_pipe); | |
b3530820 JG |
236 | if (ret < 0) { |
237 | PERROR("UST consumerd32 channel monitor pipe close"); | |
238 | } | |
239 | } | |
412d7227 SM |
240 | if (the_ustconsumer64_data.channel_monitor_pipe >= 0) { |
241 | ret = close(the_ustconsumer64_data.channel_monitor_pipe); | |
b3530820 JG |
242 | if (ret < 0) { |
243 | PERROR("UST consumerd64 channel monitor pipe close"); | |
244 | } | |
245 | } | |
e975f9f8 DG |
246 | } |
247 | ||
4e4714cb JR |
248 | /* |
249 | * Wait on consumer process termination. | |
250 | * | |
251 | * Need to be called with the consumer data lock held or from a context | |
252 | * ensuring no concurrent access to data (e.g: cleanup). | |
253 | */ | |
254 | static void wait_consumer(struct consumer_data *consumer_data) | |
255 | { | |
256 | pid_t ret; | |
257 | int status; | |
258 | ||
259 | if (consumer_data->pid <= 0) { | |
260 | return; | |
261 | } | |
262 | ||
263 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
264 | consumer_data->pid); | |
265 | ret = waitpid(consumer_data->pid, &status, 0); | |
266 | if (ret == -1) { | |
267 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 268 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
269 | ERR("consumerd termination with error: %d", |
270 | WEXITSTATUS(ret)); | |
271 | } | |
272 | consumer_data->pid = 0; | |
273 | } | |
274 | ||
fac6795d | 275 | /* |
4a15001e | 276 | * Cleanup the session daemon's data structures. |
fac6795d | 277 | */ |
4a15001e | 278 | static void sessiond_cleanup(void) |
fac6795d | 279 | { |
ef599319 | 280 | int ret; |
e32d7f27 | 281 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 282 | |
4a15001e | 283 | DBG("Cleanup sessiond"); |
e07ae692 | 284 | |
4e449f3f MD |
285 | /* |
286 | * Close the thread quit pipe. It has already done its job, | |
287 | * since we are now called. | |
288 | */ | |
a7333da7 | 289 | sessiond_close_quit_pipe(); |
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 | ||
e6142f2e | 299 | DBG("Removing sessiond and consumerd content of directory %s", |
412d7227 | 300 | the_config.rundir.value); |
8c6c56c2 MD |
301 | |
302 | /* sessiond */ | |
412d7227 SM |
303 | DBG("Removing %s", the_config.pid_file_path.value); |
304 | (void) unlink(the_config.pid_file_path.value); | |
8c6c56c2 | 305 | |
412d7227 SM |
306 | DBG("Removing %s", the_config.agent_port_file_path.value); |
307 | (void) unlink(the_config.agent_port_file_path.value); | |
cd9290dd | 308 | |
8c6c56c2 | 309 | /* kconsumerd */ |
412d7227 SM |
310 | DBG("Removing %s", the_kconsumer_data.err_unix_sock_path); |
311 | (void) unlink(the_kconsumer_data.err_unix_sock_path); | |
e6142f2e | 312 | |
412d7227 SM |
313 | DBG("Removing directory %s", the_config.kconsumerd_path.value); |
314 | (void) rmdir(the_config.kconsumerd_path.value); | |
8c6c56c2 MD |
315 | |
316 | /* ust consumerd 32 */ | |
412d7227 SM |
317 | DBG("Removing %s", the_config.consumerd32_err_unix_sock_path.value); |
318 | (void) unlink(the_config.consumerd32_err_unix_sock_path.value); | |
e6142f2e | 319 | |
412d7227 SM |
320 | DBG("Removing directory %s", the_config.consumerd32_path.value); |
321 | (void) rmdir(the_config.consumerd32_path.value); | |
8c6c56c2 MD |
322 | |
323 | /* ust consumerd 64 */ | |
412d7227 SM |
324 | DBG("Removing %s", the_config.consumerd64_err_unix_sock_path.value); |
325 | (void) unlink(the_config.consumerd64_err_unix_sock_path.value); | |
e6142f2e | 326 | |
412d7227 SM |
327 | DBG("Removing directory %s", the_config.consumerd64_path.value); |
328 | (void) rmdir(the_config.consumerd64_path.value); | |
5461b305 | 329 | |
99d688f2 | 330 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 331 | |
44760c20 JR |
332 | DBG("Cleaning up all per-event notifier domain agents"); |
333 | agent_by_event_notifier_domain_ht_destroy(); | |
334 | ||
6a4e4039 JG |
335 | DBG("Cleaning up all agent apps"); |
336 | agent_app_ht_clean(); | |
099e26bd | 337 | DBG("Closing all UST sockets"); |
56fff090 | 338 | ust_app_clean_list(); |
7972aab2 | 339 | buffer_reg_destroy_registries(); |
099e26bd | 340 | |
0787fc4b MD |
341 | close_consumer_sockets(); |
342 | ||
412d7227 SM |
343 | wait_consumer(&the_kconsumer_data); |
344 | wait_consumer(&the_ustconsumer64_data); | |
345 | wait_consumer(&the_ustconsumer32_data); | |
0787fc4b | 346 | |
412d7227 | 347 | if (is_root && !the_config.no_kernel) { |
7d268848 | 348 | cleanup_kernel_tracer(); |
2f50c8a3 | 349 | } |
2f77fc4b | 350 | |
c9cb3e7d JG |
351 | /* |
352 | * We do NOT rmdir rundir because there are other processes | |
353 | * using it, for instance lttng-relayd, which can start in | |
354 | * parallel with this teardown. | |
355 | */ | |
4a15001e MD |
356 | } |
357 | ||
358 | /* | |
359 | * Cleanup the daemon's option data structures. | |
360 | */ | |
361 | static void sessiond_cleanup_options(void) | |
362 | { | |
363 | DBG("Cleaning up options"); | |
364 | ||
412d7227 | 365 | sessiond_config_fini(&the_config); |
c9cb3e7d | 366 | |
7567352f | 367 | run_as_destroy_worker(); |
fac6795d DG |
368 | } |
369 | ||
917a718d | 370 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 371 | { |
917a718d | 372 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
373 | } |
374 | ||
00e2e675 | 375 | /* |
917a718d JG |
376 | * Take an option from the getopt output and set it in the right variable to be |
377 | * used later. | |
36b588ed | 378 | * |
917a718d | 379 | * Return 0 on success else a negative value. |
00e2e675 | 380 | */ |
917a718d | 381 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 382 | { |
917a718d | 383 | int ret = 0; |
fac6795d | 384 | |
c0232ea5 | 385 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
386 | if (!arg || *arg == '\0') { |
387 | ret = -EINVAL; | |
388 | goto end; | |
389 | } | |
e8fa9fb0 MD |
390 | if (lttng_is_setuid_setgid()) { |
391 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
392 | "-c, --client-sock"); | |
393 | } else { | |
412d7227 | 394 | config_string_set(&the_config.client_unix_sock_path, |
e6142f2e | 395 | strdup(arg)); |
412d7227 | 396 | if (!the_config.client_unix_sock_path.value) { |
e6142f2e JG |
397 | ret = -ENOMEM; |
398 | PERROR("strdup"); | |
399 | } | |
e8fa9fb0 | 400 | } |
c0232ea5 | 401 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
402 | if (!arg || *arg == '\0') { |
403 | ret = -EINVAL; | |
404 | goto end; | |
405 | } | |
e8fa9fb0 MD |
406 | if (lttng_is_setuid_setgid()) { |
407 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
408 | "-a, --apps-sock"); | |
409 | } else { | |
412d7227 | 410 | config_string_set(&the_config.apps_unix_sock_path, |
e6142f2e | 411 | strdup(arg)); |
412d7227 | 412 | if (!the_config.apps_unix_sock_path.value) { |
e6142f2e JG |
413 | ret = -ENOMEM; |
414 | PERROR("strdup"); | |
415 | } | |
e8fa9fb0 | 416 | } |
c0232ea5 | 417 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
412d7227 | 418 | the_config.daemonize = true; |
c0232ea5 | 419 | } else if (string_match(optname, "background") || opt == 'b') { |
412d7227 | 420 | the_config.background = true; |
c0232ea5 | 421 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
422 | if (!arg || *arg == '\0') { |
423 | ret = -EINVAL; | |
424 | goto end; | |
425 | } | |
e8fa9fb0 MD |
426 | if (lttng_is_setuid_setgid()) { |
427 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
428 | "-g, --group"); | |
429 | } else { | |
412d7227 | 430 | config_string_set(&the_config.tracing_group_name, |
e6142f2e | 431 | strdup(arg)); |
412d7227 | 432 | if (!the_config.tracing_group_name.value) { |
e8fa9fb0 | 433 | ret = -ENOMEM; |
e6142f2e | 434 | PERROR("strdup"); |
e8fa9fb0 | 435 | } |
db322c4d | 436 | } |
c0232ea5 | 437 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 438 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 439 | if (ret) { |
4fc83d94 | 440 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
441 | perror("exec"); |
442 | } | |
443 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 444 | } else if (string_match(optname, "version") || opt == 'V') { |
a3bc3918 | 445 | opt_print_version = 1; |
c0232ea5 | 446 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
412d7227 | 447 | the_config.sig_parent = true; |
c0232ea5 | 448 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
449 | if (!arg || *arg == '\0') { |
450 | ret = -EINVAL; | |
451 | goto end; | |
452 | } | |
e8fa9fb0 MD |
453 | if (lttng_is_setuid_setgid()) { |
454 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
455 | "--kconsumerd-err-sock"); | |
456 | } else { | |
412d7227 SM |
457 | config_string_set( |
458 | &the_config.kconsumerd_err_unix_sock_path, | |
e6142f2e | 459 | strdup(arg)); |
412d7227 | 460 | if (!the_config.kconsumerd_err_unix_sock_path.value) { |
e6142f2e JG |
461 | ret = -ENOMEM; |
462 | PERROR("strdup"); | |
463 | } | |
e8fa9fb0 | 464 | } |
c0232ea5 | 465 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
466 | if (!arg || *arg == '\0') { |
467 | ret = -EINVAL; | |
468 | goto end; | |
469 | } | |
e8fa9fb0 MD |
470 | if (lttng_is_setuid_setgid()) { |
471 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
472 | "--kconsumerd-cmd-sock"); | |
473 | } else { | |
412d7227 SM |
474 | config_string_set( |
475 | &the_config.kconsumerd_cmd_unix_sock_path, | |
e6142f2e | 476 | strdup(arg)); |
412d7227 | 477 | if (!the_config.kconsumerd_cmd_unix_sock_path.value) { |
e6142f2e JG |
478 | ret = -ENOMEM; |
479 | PERROR("strdup"); | |
480 | } | |
e8fa9fb0 | 481 | } |
c0232ea5 | 482 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
483 | if (!arg || *arg == '\0') { |
484 | ret = -EINVAL; | |
485 | goto end; | |
486 | } | |
e8fa9fb0 MD |
487 | if (lttng_is_setuid_setgid()) { |
488 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
489 | "--ustconsumerd64-err-sock"); | |
490 | } else { | |
412d7227 SM |
491 | config_string_set( |
492 | &the_config.consumerd64_err_unix_sock_path, | |
e6142f2e | 493 | strdup(arg)); |
412d7227 | 494 | if (!the_config.consumerd64_err_unix_sock_path.value) { |
e6142f2e JG |
495 | ret = -ENOMEM; |
496 | PERROR("strdup"); | |
497 | } | |
e8fa9fb0 | 498 | } |
c0232ea5 | 499 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
500 | if (!arg || *arg == '\0') { |
501 | ret = -EINVAL; | |
502 | goto end; | |
503 | } | |
e8fa9fb0 MD |
504 | if (lttng_is_setuid_setgid()) { |
505 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
506 | "--ustconsumerd64-cmd-sock"); | |
507 | } else { | |
412d7227 SM |
508 | config_string_set( |
509 | &the_config.consumerd64_cmd_unix_sock_path, | |
e6142f2e | 510 | strdup(arg)); |
412d7227 | 511 | if (!the_config.consumerd64_cmd_unix_sock_path.value) { |
e6142f2e JG |
512 | ret = -ENOMEM; |
513 | PERROR("strdup"); | |
514 | } | |
e8fa9fb0 | 515 | } |
c0232ea5 | 516 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
517 | if (!arg || *arg == '\0') { |
518 | ret = -EINVAL; | |
519 | goto end; | |
520 | } | |
e8fa9fb0 MD |
521 | if (lttng_is_setuid_setgid()) { |
522 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
523 | "--ustconsumerd32-err-sock"); | |
524 | } else { | |
412d7227 SM |
525 | config_string_set( |
526 | &the_config.consumerd32_err_unix_sock_path, | |
e6142f2e | 527 | strdup(arg)); |
412d7227 | 528 | if (!the_config.consumerd32_err_unix_sock_path.value) { |
e6142f2e JG |
529 | ret = -ENOMEM; |
530 | PERROR("strdup"); | |
531 | } | |
e8fa9fb0 | 532 | } |
c0232ea5 | 533 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
534 | if (!arg || *arg == '\0') { |
535 | ret = -EINVAL; | |
536 | goto end; | |
537 | } | |
e8fa9fb0 MD |
538 | if (lttng_is_setuid_setgid()) { |
539 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
540 | "--ustconsumerd32-cmd-sock"); | |
541 | } else { | |
412d7227 SM |
542 | config_string_set( |
543 | &the_config.consumerd32_cmd_unix_sock_path, | |
e6142f2e | 544 | strdup(arg)); |
412d7227 | 545 | if (!the_config.consumerd32_cmd_unix_sock_path.value) { |
e6142f2e JG |
546 | ret = -ENOMEM; |
547 | PERROR("strdup"); | |
548 | } | |
e8fa9fb0 | 549 | } |
c0232ea5 | 550 | } else if (string_match(optname, "no-kernel")) { |
412d7227 | 551 | the_config.no_kernel = true; |
c0232ea5 | 552 | } else if (string_match(optname, "quiet") || opt == 'q') { |
412d7227 | 553 | the_config.quiet = true; |
c0232ea5 | 554 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
555 | /* Verbose level can increase using multiple -v */ |
556 | if (arg) { | |
13755a18 | 557 | /* Value obtained from config file */ |
412d7227 | 558 | the_config.verbose = config_parse_value(arg); |
26296c48 | 559 | } else { |
13755a18 | 560 | /* -v used on command line */ |
412d7227 | 561 | the_config.verbose++; |
26296c48 | 562 | } |
13755a18 | 563 | /* Clamp value to [0, 3] */ |
412d7227 SM |
564 | the_config.verbose = the_config.verbose < 0 ? |
565 | 0 : | |
566 | (the_config.verbose <= 3 ? the_config.verbose : | |
567 | 3); | |
c0232ea5 | 568 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 569 | if (arg) { |
412d7227 | 570 | the_config.verbose_consumer = config_parse_value(arg); |
26296c48 | 571 | } else { |
412d7227 | 572 | the_config.verbose_consumer++; |
26296c48 | 573 | } |
c0232ea5 | 574 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
575 | if (!arg || *arg == '\0') { |
576 | ret = -EINVAL; | |
577 | goto end; | |
578 | } | |
e8fa9fb0 MD |
579 | if (lttng_is_setuid_setgid()) { |
580 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
581 | "--consumerd32-path"); | |
582 | } else { | |
412d7227 | 583 | config_string_set(&the_config.consumerd32_bin_path, |
e6142f2e | 584 | strdup(arg)); |
412d7227 | 585 | if (!the_config.consumerd32_bin_path.value) { |
e8fa9fb0 MD |
586 | PERROR("strdup"); |
587 | ret = -ENOMEM; | |
588 | } | |
db322c4d | 589 | } |
c0232ea5 | 590 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
591 | if (!arg || *arg == '\0') { |
592 | ret = -EINVAL; | |
593 | goto end; | |
594 | } | |
e8fa9fb0 MD |
595 | if (lttng_is_setuid_setgid()) { |
596 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
597 | "--consumerd32-libdir"); | |
598 | } else { | |
412d7227 | 599 | config_string_set(&the_config.consumerd32_lib_dir, |
e6142f2e | 600 | strdup(arg)); |
412d7227 | 601 | if (!the_config.consumerd32_lib_dir.value) { |
e8fa9fb0 MD |
602 | PERROR("strdup"); |
603 | ret = -ENOMEM; | |
604 | } | |
db322c4d | 605 | } |
c0232ea5 | 606 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
607 | if (!arg || *arg == '\0') { |
608 | ret = -EINVAL; | |
609 | goto end; | |
610 | } | |
e8fa9fb0 MD |
611 | if (lttng_is_setuid_setgid()) { |
612 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
613 | "--consumerd64-path"); | |
614 | } else { | |
412d7227 | 615 | config_string_set(&the_config.consumerd64_bin_path, |
e6142f2e | 616 | strdup(arg)); |
412d7227 | 617 | if (!the_config.consumerd64_bin_path.value) { |
e8fa9fb0 MD |
618 | PERROR("strdup"); |
619 | ret = -ENOMEM; | |
620 | } | |
db322c4d | 621 | } |
c0232ea5 | 622 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
623 | if (!arg || *arg == '\0') { |
624 | ret = -EINVAL; | |
625 | goto end; | |
626 | } | |
e8fa9fb0 MD |
627 | if (lttng_is_setuid_setgid()) { |
628 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
629 | "--consumerd64-libdir"); | |
630 | } else { | |
412d7227 | 631 | config_string_set(&the_config.consumerd64_lib_dir, |
e6142f2e | 632 | strdup(arg)); |
412d7227 | 633 | if (!the_config.consumerd64_lib_dir.value) { |
e8fa9fb0 MD |
634 | PERROR("strdup"); |
635 | ret = -ENOMEM; | |
636 | } | |
db322c4d | 637 | } |
c0232ea5 | 638 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
639 | if (!arg || *arg == '\0') { |
640 | ret = -EINVAL; | |
641 | goto end; | |
642 | } | |
e8fa9fb0 MD |
643 | if (lttng_is_setuid_setgid()) { |
644 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
645 | "-p, --pidfile"); | |
646 | } else { | |
412d7227 SM |
647 | config_string_set( |
648 | &the_config.pid_file_path, strdup(arg)); | |
649 | if (!the_config.pid_file_path.value) { | |
e8fa9fb0 MD |
650 | PERROR("strdup"); |
651 | ret = -ENOMEM; | |
652 | } | |
db322c4d | 653 | } |
c0232ea5 | 654 | } else if (string_match(optname, "agent-tcp-port")) { |
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.", | |
661 | "--agent-tcp-port"); | |
662 | } else { | |
663 | unsigned long v; | |
4d076222 | 664 | |
e8fa9fb0 MD |
665 | errno = 0; |
666 | v = strtoul(arg, NULL, 0); | |
667 | if (errno != 0 || !isdigit(arg[0])) { | |
668 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
669 | return -1; | |
670 | } | |
671 | if (v == 0 || v >= 65535) { | |
672 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
673 | return -1; | |
674 | } | |
412d7227 SM |
675 | the_config.agent_tcp_port.begin = |
676 | the_config.agent_tcp_port.end = (int) v; | |
2288467f | 677 | DBG3("Agent TCP port set to non default: %i", (int) v); |
26296c48 | 678 | } |
c0232ea5 | 679 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
680 | if (!arg || *arg == '\0') { |
681 | ret = -EINVAL; | |
682 | goto end; | |
683 | } | |
e8fa9fb0 MD |
684 | if (lttng_is_setuid_setgid()) { |
685 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
686 | "-l, --load"); | |
687 | } else { | |
412d7227 SM |
688 | config_string_set(&the_config.load_session_path, |
689 | strdup(arg)); | |
690 | if (!the_config.load_session_path.value) { | |
e8fa9fb0 MD |
691 | PERROR("strdup"); |
692 | ret = -ENOMEM; | |
693 | } | |
ef367a93 | 694 | } |
c0232ea5 | 695 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
696 | if (!arg || *arg == '\0') { |
697 | ret = -EINVAL; | |
698 | goto end; | |
699 | } | |
e8fa9fb0 MD |
700 | if (lttng_is_setuid_setgid()) { |
701 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
702 | "--kmod-probes"); | |
703 | } else { | |
412d7227 SM |
704 | config_string_set(&the_config.kmod_probes_list, |
705 | strdup(arg)); | |
706 | if (!the_config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
707 | PERROR("strdup"); |
708 | ret = -ENOMEM; | |
709 | } | |
c9d42407 | 710 | } |
c0232ea5 | 711 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
712 | if (!arg || *arg == '\0') { |
713 | ret = -EINVAL; | |
714 | goto end; | |
715 | } | |
e8fa9fb0 MD |
716 | if (lttng_is_setuid_setgid()) { |
717 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
718 | "--extra-kmod-probes"); | |
719 | } else { | |
412d7227 | 720 | config_string_set(&the_config.kmod_extra_probes_list, |
e6142f2e | 721 | strdup(arg)); |
412d7227 | 722 | if (!the_config.kmod_extra_probes_list.value) { |
e8fa9fb0 MD |
723 | PERROR("strdup"); |
724 | ret = -ENOMEM; | |
725 | } | |
db322c4d | 726 | } |
761ffce2 | 727 | } else if (string_match(optname, EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR)) { |
90aa04a1 FD |
728 | unsigned long v; |
729 | ||
730 | errno = 0; | |
731 | v = strtoul(arg, NULL, 0); | |
732 | if (errno != 0 || !isdigit(arg[0])) { | |
761ffce2 FD |
733 | ERR("Wrong value in --%s parameter: %s", |
734 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, arg); | |
90aa04a1 FD |
735 | return -1; |
736 | } | |
737 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
761ffce2 FD |
738 | ERR("Value out of range for --%s parameter: %s", |
739 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_KERNEL_OPTION_STR, arg); | |
90aa04a1 FD |
740 | return -1; |
741 | } | |
761ffce2 FD |
742 | the_config.event_notifier_buffer_size_kernel = (int) v; |
743 | DBG3("Number of event notifier error buffer kernel size to non default: %i", | |
744 | the_config.event_notifier_buffer_size_kernel); | |
745 | goto end; | |
746 | } else if (string_match(optname, EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR)) { | |
747 | unsigned long v; | |
748 | ||
749 | errno = 0; | |
750 | v = strtoul(arg, NULL, 0); | |
751 | if (errno != 0 || !isdigit(arg[0])) { | |
752 | ERR("Wrong value in --%s parameter: %s", | |
753 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, arg); | |
754 | return -1; | |
755 | } | |
756 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
757 | ERR("Value out of range for --%s parameter: %s", | |
758 | EVENT_NOTIFIER_ERROR_BUFFER_SIZE_USERSPACE_OPTION_STR, arg); | |
759 | return -1; | |
760 | } | |
761 | the_config.event_notifier_buffer_size_userspace = (int) v; | |
762 | DBG3("Number of event notifier error buffer userspace size to non default: %i", | |
763 | the_config.event_notifier_buffer_size_userspace); | |
90aa04a1 | 764 | goto end; |
c0232ea5 JG |
765 | } else if (string_match(optname, "config") || opt == 'f') { |
766 | /* This is handled in set_options() thus silent skip. */ | |
767 | goto end; | |
768 | } else { | |
26296c48 JG |
769 | /* Unknown option or other error. |
770 | * Error is printed by getopt, just return */ | |
771 | ret = -1; | |
772 | } | |
773 | ||
f3dd7ce7 | 774 | end: |
c5d350b2 JG |
775 | if (ret == -EINVAL) { |
776 | const char *opt_name = "unknown"; | |
777 | int i; | |
778 | ||
779 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
780 | i++) { | |
781 | if (opt == long_options[i].val) { | |
782 | opt_name = long_options[i].name; | |
783 | break; | |
784 | } | |
785 | } | |
786 | ||
787 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
788 | opt_name); | |
789 | } | |
f3dd7ce7 | 790 | |
26296c48 JG |
791 | return ret; |
792 | } | |
793 | ||
794 | /* | |
795 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 796 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
797 | * return value conventions. |
798 | */ | |
799 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
800 | { | |
801 | int ret = 0, i; | |
802 | ||
803 | if (!entry || !entry->name || !entry->value) { | |
804 | ret = -EINVAL; | |
805 | goto end; | |
806 | } | |
807 | ||
808 | /* Check if the option is to be ignored */ | |
809 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
810 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
811 | goto end; | |
812 | } | |
813 | } | |
814 | ||
815 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
816 | i++) { | |
817 | ||
818 | /* Ignore if not fully matched. */ | |
819 | if (strcmp(entry->name, long_options[i].name)) { | |
820 | continue; | |
821 | } | |
822 | ||
823 | /* | |
824 | * If the option takes no argument on the command line, we have to | |
825 | * check if the value is "true". We support non-zero numeric values, | |
826 | * true, on and yes. | |
827 | */ | |
828 | if (!long_options[i].has_arg) { | |
829 | ret = config_parse_value(entry->value); | |
830 | if (ret <= 0) { | |
831 | if (ret) { | |
832 | WARN("Invalid configuration value \"%s\" for option %s", | |
833 | entry->value, entry->name); | |
834 | } | |
835 | /* False, skip boolean config option. */ | |
836 | goto end; | |
4d076222 | 837 | } |
26296c48 JG |
838 | } |
839 | ||
840 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
841 | goto end; | |
842 | } | |
843 | ||
844 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
845 | ||
846 | end: | |
847 | return ret; | |
848 | } | |
849 | ||
a3bc3918 JR |
850 | static void print_version(void) { |
851 | fprintf(stdout, "%s\n", VERSION); | |
852 | } | |
853 | ||
26296c48 JG |
854 | /* |
855 | * daemon configuration loading and argument parsing | |
856 | */ | |
857 | static int set_options(int argc, char **argv) | |
858 | { | |
859 | int ret = 0, c = 0, option_index = 0; | |
860 | int orig_optopt = optopt, orig_optind = optind; | |
861 | char *optstring; | |
fcf27bee | 862 | char *config_path = NULL; |
26296c48 JG |
863 | |
864 | optstring = utils_generate_optstring(long_options, | |
865 | sizeof(long_options) / sizeof(struct option)); | |
866 | if (!optstring) { | |
867 | ret = -ENOMEM; | |
868 | goto end; | |
869 | } | |
870 | ||
871 | /* Check for the --config option */ | |
872 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
873 | &option_index)) != -1) { | |
874 | if (c == '?') { | |
875 | ret = -EINVAL; | |
876 | goto end; | |
877 | } else if (c != 'f') { | |
878 | /* if not equal to --config option. */ | |
879 | continue; | |
880 | } | |
881 | ||
e8fa9fb0 MD |
882 | if (lttng_is_setuid_setgid()) { |
883 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
884 | "-f, --config"); | |
885 | } else { | |
fcf27bee | 886 | free(config_path); |
e8fa9fb0 MD |
887 | config_path = utils_expand_path(optarg); |
888 | if (!config_path) { | |
889 | ERR("Failed to resolve path: %s", optarg); | |
890 | } | |
26296c48 JG |
891 | } |
892 | } | |
893 | ||
894 | ret = config_get_section_entries(config_path, config_section_name, | |
895 | config_entry_handler, NULL); | |
896 | if (ret) { | |
897 | if (ret > 0) { | |
898 | ERR("Invalid configuration option at line %i", ret); | |
899 | ret = -1; | |
900 | } | |
901 | goto end; | |
902 | } | |
903 | ||
904 | /* Reset getopt's global state */ | |
905 | optopt = orig_optopt; | |
906 | optind = orig_optind; | |
907 | while (1) { | |
c0232ea5 JG |
908 | option_index = -1; |
909 | /* | |
910 | * getopt_long() will not set option_index if it encounters a | |
911 | * short option. | |
912 | */ | |
913 | c = getopt_long(argc, argv, optstring, long_options, | |
914 | &option_index); | |
26296c48 | 915 | if (c == -1) { |
4d076222 DG |
916 | break; |
917 | } | |
26296c48 | 918 | |
c0232ea5 JG |
919 | /* |
920 | * Pass NULL as the long option name if popt left the index | |
921 | * unset. | |
922 | */ | |
923 | ret = set_option(c, optarg, | |
924 | option_index < 0 ? NULL : | |
925 | long_options[option_index].name); | |
26296c48 JG |
926 | if (ret < 0) { |
927 | break; | |
fac6795d DG |
928 | } |
929 | } | |
930 | ||
26296c48 | 931 | end: |
fcf27bee | 932 | free(config_path); |
26296c48 JG |
933 | free(optstring); |
934 | return ret; | |
fac6795d DG |
935 | } |
936 | ||
f472090a JG |
937 | /* |
938 | * Create lockfile using the rundir and return its fd. | |
939 | */ | |
940 | static int create_lockfile(void) | |
941 | { | |
412d7227 | 942 | return utils_create_lock_file(the_config.lock_file_path.value); |
f472090a JG |
943 | } |
944 | ||
fac6795d | 945 | /* |
54d01ffb DG |
946 | * Check if the global socket is available, and if a daemon is answering at the |
947 | * other side. If yes, error is returned. | |
f472090a JG |
948 | * |
949 | * Also attempts to create and hold the lock file. | |
fac6795d | 950 | */ |
cf3af59e | 951 | static int check_existing_daemon(void) |
fac6795d | 952 | { |
f472090a JG |
953 | int ret = 0; |
954 | ||
7d8234d9 | 955 | /* Is there anybody out there ? */ |
099e26bd | 956 | if (lttng_session_daemon_alive()) { |
f472090a JG |
957 | ret = -EEXIST; |
958 | goto end; | |
099e26bd | 959 | } |
b09c7c76 | 960 | |
f472090a JG |
961 | lockfile_fd = create_lockfile(); |
962 | if (lockfile_fd < 0) { | |
963 | ret = -EEXIST; | |
964 | goto end; | |
965 | } | |
966 | end: | |
967 | return ret; | |
968 | } | |
969 | ||
970 | static void sessiond_cleanup_lock_file(void) | |
971 | { | |
972 | int ret; | |
973 | ||
974 | /* | |
975 | * Cleanup lock file by deleting it and finaly closing it which will | |
976 | * release the file system lock. | |
977 | */ | |
978 | if (lockfile_fd >= 0) { | |
412d7227 | 979 | ret = remove(the_config.lock_file_path.value); |
f472090a JG |
980 | if (ret < 0) { |
981 | PERROR("remove lock file"); | |
982 | } | |
983 | ret = close(lockfile_fd); | |
984 | if (ret < 0) { | |
985 | PERROR("close lock file"); | |
986 | } | |
987 | } | |
fac6795d DG |
988 | } |
989 | ||
fac6795d | 990 | /* |
d063d709 | 991 | * Set the tracing group gid onto the client socket. |
5e16da05 | 992 | * |
d063d709 | 993 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 994 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 995 | */ |
be040666 | 996 | static int set_permissions(char *rundir) |
fac6795d DG |
997 | { |
998 | int ret; | |
996b65c8 | 999 | gid_t gid; |
fac6795d | 1000 | |
412d7227 SM |
1001 | ret = utils_get_group_id( |
1002 | the_config.tracing_group_name.value, true, &gid); | |
28ab59d0 JR |
1003 | if (ret) { |
1004 | /* Default to root group. */ | |
1005 | gid = 0; | |
1006 | } | |
fac6795d | 1007 | |
d6f42150 | 1008 | /* Set lttng run dir */ |
be040666 | 1009 | ret = chown(rundir, 0, gid); |
d6f42150 | 1010 | if (ret < 0) { |
be040666 | 1011 | ERR("Unable to set group on %s", rundir); |
76d7553f | 1012 | PERROR("chown"); |
d6f42150 DG |
1013 | } |
1014 | ||
6c71277b MD |
1015 | /* |
1016 | * Ensure all applications and tracing group can search the run | |
1017 | * dir. Allow everyone to read the directory, since it does not | |
1018 | * buy us anything to hide its content. | |
1019 | */ | |
1020 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
1021 | if (ret < 0) { |
1022 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 1023 | PERROR("chmod"); |
d1613cf5 JN |
1024 | } |
1025 | ||
d6f42150 | 1026 | /* lttng client socket path */ |
412d7227 | 1027 | ret = chown(the_config.client_unix_sock_path.value, 0, gid); |
fac6795d | 1028 | if (ret < 0) { |
412d7227 SM |
1029 | ERR("Unable to set group on %s", |
1030 | the_config.client_unix_sock_path.value); | |
76d7553f | 1031 | PERROR("chown"); |
d6f42150 DG |
1032 | } |
1033 | ||
3bd1e081 | 1034 | /* kconsumer error socket path */ |
412d7227 | 1035 | ret = chown(the_kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 1036 | if (ret < 0) { |
412d7227 SM |
1037 | ERR("Unable to set group on %s", |
1038 | the_kconsumer_data.err_unix_sock_path); | |
76d7553f | 1039 | PERROR("chown"); |
3bd1e081 MD |
1040 | } |
1041 | ||
7753dea8 | 1042 | /* 64-bit ustconsumer error socket path */ |
412d7227 | 1043 | ret = chown(the_ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 | 1044 | if (ret < 0) { |
412d7227 SM |
1045 | ERR("Unable to set group on %s", |
1046 | the_ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 1047 | PERROR("chown"); |
7753dea8 MD |
1048 | } |
1049 | ||
1050 | /* 32-bit ustconsumer compat32 error socket path */ | |
412d7227 | 1051 | ret = chown(the_ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1052 | if (ret < 0) { |
412d7227 SM |
1053 | ERR("Unable to set group on %s", |
1054 | the_ustconsumer32_data.err_unix_sock_path); | |
76d7553f | 1055 | PERROR("chown"); |
fac6795d DG |
1056 | } |
1057 | ||
d6f42150 | 1058 | DBG("All permissions are set"); |
e07ae692 | 1059 | |
fac6795d DG |
1060 | return ret; |
1061 | } | |
1062 | ||
d6f42150 | 1063 | /* |
d063d709 | 1064 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1065 | */ |
e6142f2e | 1066 | static int create_lttng_rundir(void) |
d6f42150 DG |
1067 | { |
1068 | int ret; | |
1069 | ||
412d7227 | 1070 | DBG3("Creating LTTng run directory: %s", the_config.rundir.value); |
67e40797 | 1071 | |
412d7227 | 1072 | ret = mkdir(the_config.rundir.value, S_IRWXU); |
d6f42150 | 1073 | if (ret < 0) { |
b1f11e69 | 1074 | if (errno != EEXIST) { |
412d7227 | 1075 | ERR("Unable to create %s", the_config.rundir.value); |
b1f11e69 DG |
1076 | goto error; |
1077 | } else { | |
1078 | ret = 0; | |
1079 | } | |
d6f42150 DG |
1080 | } |
1081 | ||
1082 | error: | |
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | /* | |
e6142f2e | 1087 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1088 | * session daemon. |
d6f42150 | 1089 | */ |
e6142f2e | 1090 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1091 | { |
1092 | int ret; | |
e6142f2e | 1093 | char *path = NULL; |
d6f42150 | 1094 | |
6c71277b | 1095 | switch (consumer_data->type) { |
7753dea8 | 1096 | case LTTNG_CONSUMER_KERNEL: |
412d7227 | 1097 | path = the_config.kconsumerd_path.value; |
7753dea8 MD |
1098 | break; |
1099 | case LTTNG_CONSUMER64_UST: | |
412d7227 | 1100 | path = the_config.consumerd64_path.value; |
7753dea8 MD |
1101 | break; |
1102 | case LTTNG_CONSUMER32_UST: | |
412d7227 | 1103 | path = the_config.consumerd32_path.value; |
7753dea8 MD |
1104 | break; |
1105 | default: | |
1106 | ERR("Consumer type unknown"); | |
1107 | ret = -EINVAL; | |
1108 | goto error; | |
d6f42150 | 1109 | } |
e6142f2e | 1110 | assert(path); |
d6f42150 | 1111 | |
67e40797 DG |
1112 | DBG2("Creating consumer directory: %s", path); |
1113 | ||
6c71277b | 1114 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1115 | if (ret < 0 && errno != EEXIST) { |
1116 | PERROR("mkdir"); | |
1117 | ERR("Failed to create %s", path); | |
1118 | goto error; | |
d6f42150 | 1119 | } |
6c71277b | 1120 | if (is_root) { |
28ab59d0 JR |
1121 | gid_t gid; |
1122 | ||
412d7227 SM |
1123 | ret = utils_get_group_id(the_config.tracing_group_name.value, |
1124 | true, &gid); | |
28ab59d0 JR |
1125 | if (ret) { |
1126 | /* Default to root group. */ | |
1127 | gid = 0; | |
1128 | } | |
1129 | ||
1130 | ret = chown(path, 0, gid); | |
6c71277b MD |
1131 | if (ret < 0) { |
1132 | ERR("Unable to set group on %s", path); | |
1133 | PERROR("chown"); | |
1134 | goto error; | |
1135 | } | |
1136 | } | |
d6f42150 | 1137 | |
e6142f2e | 1138 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1139 | consumer_data->err_sock = |
1140 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1141 | if (consumer_data->err_sock < 0) { | |
1142 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1143 | ret = -1; |
1144 | goto error; | |
1145 | } | |
1146 | ||
a24f05ab MD |
1147 | /* |
1148 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1149 | * show must go on. | |
1150 | */ | |
1151 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1152 | if (ret < 0) { | |
1153 | PERROR("utils_set_fd_cloexec"); | |
1154 | /* continue anyway */ | |
1155 | } | |
1156 | ||
d6f42150 | 1157 | /* File permission MUST be 660 */ |
3bd1e081 | 1158 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 1159 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1160 | if (ret < 0) { |
3bd1e081 | 1161 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1162 | PERROR("chmod"); |
d6f42150 DG |
1163 | goto error; |
1164 | } | |
1165 | ||
1166 | error: | |
1167 | return ret; | |
1168 | } | |
1169 | ||
fac6795d | 1170 | /* |
d063d709 | 1171 | * Signal handler for the daemon |
cf3af59e | 1172 | * |
54d01ffb DG |
1173 | * Simply stop all worker threads, leaving main() return gracefully after |
1174 | * joining all threads and calling cleanup(). | |
fac6795d | 1175 | */ |
d85707b0 | 1176 | static void sighandler(int sig, siginfo_t *siginfo, void *arg) |
fac6795d DG |
1177 | { |
1178 | switch (sig) { | |
cf3af59e | 1179 | case SIGINT: |
af87c45a | 1180 | DBG("SIGINT caught"); |
cf3af59e MD |
1181 | stop_threads(); |
1182 | break; | |
1183 | case SIGTERM: | |
af87c45a | 1184 | DBG("SIGTERM caught"); |
cf3af59e MD |
1185 | stop_threads(); |
1186 | break; | |
0bb7724a DG |
1187 | case SIGUSR1: |
1188 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1189 | break; | |
d85707b0 MD |
1190 | case SIGBUS: |
1191 | { | |
1192 | int write_ret; | |
1193 | const char msg[] = "Received SIGBUS, aborting program.\n"; | |
1194 | ||
1195 | lttng_ust_handle_sigbus(siginfo->si_addr); | |
1196 | /* | |
1197 | * If ustctl did not catch this signal (triggering a | |
1198 | * siglongjmp), abort the program. Otherwise, the execution | |
1199 | * will resume from the ust-ctl call which caused this error. | |
1200 | * | |
1201 | * The return value is ignored since the program aborts anyhow. | |
1202 | */ | |
1203 | write_ret = write(STDERR_FILENO, msg, sizeof(msg)); | |
1204 | (void) write_ret; | |
1205 | abort(); | |
1206 | } | |
cf3af59e MD |
1207 | default: |
1208 | break; | |
fac6795d | 1209 | } |
fac6795d DG |
1210 | } |
1211 | ||
1212 | /* | |
d063d709 | 1213 | * Setup signal handler for : |
1d4b027a | 1214 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1215 | */ |
1d4b027a | 1216 | static int set_signal_handler(void) |
fac6795d | 1217 | { |
1d4b027a DG |
1218 | int ret = 0; |
1219 | struct sigaction sa; | |
1220 | sigset_t sigset; | |
fac6795d | 1221 | |
1d4b027a | 1222 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1223 | PERROR("sigemptyset"); |
1d4b027a DG |
1224 | return ret; |
1225 | } | |
d6f42150 | 1226 | |
1d4b027a | 1227 | sa.sa_mask = sigset; |
d85707b0 | 1228 | sa.sa_flags = SA_SIGINFO; |
0072e5e2 | 1229 | |
d85707b0 | 1230 | sa.sa_sigaction = sighandler; |
1d4b027a | 1231 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 1232 | PERROR("sigaction"); |
1d4b027a | 1233 | return ret; |
d6f42150 DG |
1234 | } |
1235 | ||
1d4b027a | 1236 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 1237 | PERROR("sigaction"); |
1d4b027a | 1238 | return ret; |
d6f42150 | 1239 | } |
aaf26714 | 1240 | |
0072e5e2 | 1241 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 1242 | PERROR("sigaction"); |
1d4b027a | 1243 | return ret; |
8c0faa1d DG |
1244 | } |
1245 | ||
d85707b0 MD |
1246 | if ((ret = sigaction(SIGBUS, &sa, NULL)) < 0) { |
1247 | PERROR("sigaction"); | |
1248 | return ret; | |
1249 | } | |
1250 | ||
1251 | sa.sa_flags = 0; | |
0072e5e2 MD |
1252 | sa.sa_handler = SIG_IGN; |
1253 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
1254 | PERROR("sigaction"); |
1255 | return ret; | |
1256 | } | |
1257 | ||
d85707b0 | 1258 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE, SIGINT, and SIGBUS"); |
1d4b027a DG |
1259 | |
1260 | return ret; | |
fac6795d DG |
1261 | } |
1262 | ||
f3ed775e | 1263 | /* |
d063d709 | 1264 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1265 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
1266 | */ |
1267 | static void set_ulimit(void) | |
1268 | { | |
1269 | int ret; | |
1270 | struct rlimit lim; | |
1271 | ||
514bb9f0 | 1272 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1273 | lim.rlim_cur = 65535; |
1274 | lim.rlim_max = 65535; | |
1275 | ||
1276 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1277 | if (ret < 0) { | |
76d7553f | 1278 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1279 | } |
1280 | } | |
1281 | ||
4a15001e | 1282 | static int write_pidfile(void) |
35f90c40 | 1283 | { |
412d7227 | 1284 | return utils_create_pid_file(getpid(), the_config.pid_file_path.value); |
35f90c40 DG |
1285 | } |
1286 | ||
e6142f2e JG |
1287 | static int set_clock_plugin_env(void) |
1288 | { | |
1289 | int ret = 0; | |
1290 | char *env_value = NULL; | |
cd9290dd | 1291 | |
412d7227 | 1292 | if (!the_config.lttng_ust_clock_plugin.value) { |
e6142f2e JG |
1293 | goto end; |
1294 | } | |
1295 | ||
3cfcd698 | 1296 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", |
412d7227 | 1297 | the_config.lttng_ust_clock_plugin.value); |
cd9290dd | 1298 | if (ret < 0) { |
e6142f2e JG |
1299 | PERROR("asprintf"); |
1300 | goto end; | |
cd9290dd DG |
1301 | } |
1302 | ||
e6142f2e JG |
1303 | ret = putenv(env_value); |
1304 | if (ret) { | |
1305 | free(env_value); | |
1306 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1307 | goto end; | |
1308 | } | |
cd9290dd | 1309 | |
e6142f2e | 1310 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
412d7227 | 1311 | the_config.lttng_ust_clock_plugin.value); |
e6142f2e | 1312 | end: |
4a15001e | 1313 | return ret; |
ef367a93 JG |
1314 | } |
1315 | ||
99d688f2 JG |
1316 | static void destroy_all_sessions_and_wait(void) |
1317 | { | |
1318 | struct ltt_session *session, *tmp; | |
1319 | struct ltt_session_list *session_list; | |
1320 | ||
1321 | session_list = session_get_list(); | |
1322 | DBG("Initiating destruction of all sessions"); | |
1323 | ||
1324 | if (!session_list) { | |
1325 | return; | |
1326 | } | |
1327 | ||
99d688f2 JG |
1328 | session_lock_list(); |
1329 | /* Initiate the destruction of all sessions. */ | |
1330 | cds_list_for_each_entry_safe(session, tmp, | |
1331 | &session_list->head, list) { | |
1332 | if (!session_get(session)) { | |
1333 | continue; | |
1334 | } | |
1335 | ||
1336 | session_lock(session); | |
1337 | if (session->destroyed) { | |
1338 | goto unlock_session; | |
1339 | } | |
63763958 | 1340 | (void) cmd_stop_trace(session); |
412d7227 SM |
1341 | (void) cmd_destroy_session( |
1342 | session, the_notification_thread_handle, NULL); | |
99d688f2 JG |
1343 | unlock_session: |
1344 | session_unlock(session); | |
1345 | session_put(session); | |
1346 | } | |
1347 | session_unlock_list(); | |
1348 | ||
1349 | /* Wait for the destruction of all sessions to complete. */ | |
1350 | DBG("Waiting for the destruction of all sessions to complete"); | |
1351 | session_list_wait_empty(); | |
1352 | DBG("Destruction of all sessions completed"); | |
1353 | } | |
1354 | ||
b69a1b40 JG |
1355 | static void unregister_all_triggers(void) |
1356 | { | |
1357 | enum lttng_error_code ret_code; | |
1358 | enum lttng_trigger_status trigger_status; | |
1359 | struct lttng_triggers *triggers = NULL; | |
1360 | unsigned int trigger_count, i; | |
1361 | const struct lttng_credentials creds = { | |
e534f206 | 1362 | .uid = LTTNG_OPTIONAL_INIT_VALUE(0), |
b69a1b40 JG |
1363 | }; |
1364 | ||
1365 | DBG("Unregistering all triggers"); | |
1366 | ||
1367 | /* | |
1368 | * List all triggers as "root" since we wish to unregister all triggers. | |
1369 | */ | |
1370 | ret_code = notification_thread_command_list_triggers( | |
412d7227 SM |
1371 | the_notification_thread_handle, creds.uid.value, |
1372 | &triggers); | |
b69a1b40 JG |
1373 | if (ret_code != LTTNG_OK) { |
1374 | ERR("Failed to list triggers while unregistering all triggers"); | |
1375 | goto end; | |
1376 | } | |
1377 | ||
1378 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
1379 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1380 | ||
1381 | for (i = 0; i < trigger_count; i++) { | |
b69a1b40 JG |
1382 | uid_t trigger_owner; |
1383 | const char *trigger_name; | |
1384 | const struct lttng_trigger *trigger = | |
1385 | lttng_triggers_get_at_index(triggers, i); | |
1386 | ||
1387 | assert(trigger); | |
1388 | ||
1389 | trigger_status = lttng_trigger_get_owner_uid( | |
1390 | trigger, &trigger_owner); | |
1391 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1392 | ||
1393 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
0efb2ad7 JG |
1394 | trigger_name = trigger_status == LTTNG_TRIGGER_STATUS_OK ? |
1395 | trigger_name : "(anonymous)"; | |
b69a1b40 JG |
1396 | |
1397 | DBG("Unregistering trigger: trigger owner uid = %d, trigger name = '%s'", | |
1398 | (int) trigger_owner, trigger_name); | |
1399 | ||
412d7227 SM |
1400 | ret_code = cmd_unregister_trigger(&creds, trigger, |
1401 | the_notification_thread_handle); | |
b69a1b40 JG |
1402 | if (ret_code != LTTNG_OK) { |
1403 | ERR("Failed to unregister trigger: trigger owner uid = %d, trigger name = '%s', error: '%s'", | |
1404 | (int) trigger_owner, trigger_name, | |
1405 | lttng_strerror(-ret_code)); | |
1406 | /* Continue to unregister the remaining triggers. */ | |
1407 | } | |
1408 | } | |
1409 | end: | |
1410 | lttng_triggers_destroy(triggers); | |
1411 | } | |
1412 | ||
929f71ec JG |
1413 | static int run_as_worker_post_fork_cleanup(void *data) |
1414 | { | |
1415 | struct sessiond_config *sessiond_config = data; | |
1416 | ||
1417 | sessiond_config_fini(sessiond_config); | |
1418 | return 0; | |
1419 | } | |
1420 | ||
1421 | static int launch_run_as_worker(const char *procname) | |
1422 | { | |
1423 | /* | |
1424 | * Clean-up before forking the run-as worker. Any dynamically | |
1425 | * allocated memory of which the worker is not aware will | |
1426 | * be leaked as the process forks a run-as worker (and performs | |
1427 | * no exec*()). The same would apply to any opened fd. | |
1428 | */ | |
412d7227 SM |
1429 | return run_as_create_worker( |
1430 | procname, run_as_worker_post_fork_cleanup, &the_config); | |
929f71ec JG |
1431 | } |
1432 | ||
52a0e931 JG |
1433 | static void sessiond_uuid_log(void) |
1434 | { | |
c70636a7 | 1435 | char uuid_str[LTTNG_UUID_STR_LEN]; |
52a0e931 | 1436 | |
412d7227 | 1437 | lttng_uuid_to_str(the_sessiond_uuid, uuid_str); |
52a0e931 JG |
1438 | DBG("Starting lttng-sessiond {%s}", uuid_str); |
1439 | } | |
1440 | ||
fac6795d DG |
1441 | /* |
1442 | * main | |
1443 | */ | |
1444 | int main(int argc, char **argv) | |
1445 | { | |
4a15001e | 1446 | int ret = 0, retval = 0; |
e6142f2e | 1447 | const char *env_app_timeout; |
b3530820 JG |
1448 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
1449 | *ust64_channel_monitor_pipe = NULL, | |
1450 | *kernel_channel_monitor_pipe = NULL; | |
a3707772 | 1451 | struct lttng_thread *ht_cleanup_thread = NULL; |
bc26e826 | 1452 | struct timer_thread_parameters timer_thread_parameters; |
64d9b072 JG |
1453 | /* Rotation thread handle. */ |
1454 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
1455 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
1456 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
917a718d | 1457 | struct lttng_thread *client_thread = NULL; |
4a91420c | 1458 | struct lttng_thread *notification_thread = NULL; |
bd9addf7 | 1459 | struct lttng_thread *register_apps_thread = NULL; |
761ffce2 | 1460 | enum event_notifier_error_accounting_status event_notifier_error_accounting_status; |
fac6795d | 1461 | |
f5fb86c1 | 1462 | logger_set_thread_name("Main", false); |
335a95b7 MD |
1463 | init_kernel_workarounds(); |
1464 | ||
f6a9efaa DG |
1465 | rcu_register_thread(); |
1466 | ||
4a15001e MD |
1467 | if (set_signal_handler()) { |
1468 | retval = -1; | |
1469 | goto exit_set_signal_handler; | |
0bb7724a DG |
1470 | } |
1471 | ||
92816cc3 | 1472 | if (timer_signal_init()) { |
d086f507 JD |
1473 | retval = -1; |
1474 | goto exit_set_signal_handler; | |
1475 | } | |
1476 | ||
412d7227 SM |
1477 | the_page_size = sysconf(_SC_PAGESIZE); |
1478 | if (the_page_size < 0) { | |
12744796 | 1479 | PERROR("sysconf _SC_PAGESIZE"); |
412d7227 SM |
1480 | the_page_size = LONG_MAX; |
1481 | WARN("Fallback page size to %ld", the_page_size); | |
12744796 DG |
1482 | } |
1483 | ||
412d7227 | 1484 | ret = sessiond_config_init(&the_config); |
e6142f2e JG |
1485 | if (ret) { |
1486 | retval = -1; | |
1487 | goto exit_set_signal_handler; | |
1488 | } | |
1489 | ||
2788b494 JR |
1490 | /* |
1491 | * Init config from environment variables. | |
1492 | * Command line option override env configuration per-doc. Do env first. | |
1493 | */ | |
412d7227 | 1494 | sessiond_config_apply_env_config(&the_config); |
2788b494 | 1495 | |
4a15001e MD |
1496 | /* |
1497 | * Parse arguments and load the daemon configuration file. | |
1498 | * | |
1499 | * We have an exit_options exit path to free memory reserved by | |
1500 | * set_options. This is needed because the rest of sessiond_cleanup() | |
1501 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
1502 | * depends on set_options. | |
1503 | */ | |
fac6795d | 1504 | progname = argv[0]; |
4a15001e MD |
1505 | if (set_options(argc, argv)) { |
1506 | retval = -1; | |
1507 | goto exit_options; | |
fac6795d DG |
1508 | } |
1509 | ||
e6142f2e JG |
1510 | /* |
1511 | * Resolve all paths received as arguments, configuration option, or | |
1512 | * through environment variable as absolute paths. This is necessary | |
1513 | * since daemonizing causes the sessiond's current working directory | |
1514 | * to '/'. | |
1515 | */ | |
412d7227 | 1516 | ret = sessiond_config_resolve_paths(&the_config); |
e6142f2e JG |
1517 | if (ret) { |
1518 | goto exit_options; | |
1519 | } | |
1520 | ||
1521 | /* Apply config. */ | |
412d7227 SM |
1522 | lttng_opt_verbose = the_config.verbose; |
1523 | lttng_opt_quiet = the_config.quiet; | |
1524 | the_kconsumer_data.err_unix_sock_path = | |
1525 | the_config.kconsumerd_err_unix_sock_path.value; | |
1526 | the_kconsumer_data.cmd_unix_sock_path = | |
1527 | the_config.kconsumerd_cmd_unix_sock_path.value; | |
1528 | the_ustconsumer32_data.err_unix_sock_path = | |
1529 | the_config.consumerd32_err_unix_sock_path.value; | |
1530 | the_ustconsumer32_data.cmd_unix_sock_path = | |
1531 | the_config.consumerd32_cmd_unix_sock_path.value; | |
1532 | the_ustconsumer64_data.err_unix_sock_path = | |
1533 | the_config.consumerd64_err_unix_sock_path.value; | |
1534 | the_ustconsumer64_data.cmd_unix_sock_path = | |
1535 | the_config.consumerd64_cmd_unix_sock_path.value; | |
e6142f2e JG |
1536 | set_clock_plugin_env(); |
1537 | ||
412d7227 | 1538 | sessiond_config_log(&the_config); |
52a0e931 | 1539 | sessiond_uuid_log(); |
e6142f2e | 1540 | |
a3bc3918 JR |
1541 | if (opt_print_version) { |
1542 | print_version(); | |
1543 | retval = 0; | |
1544 | goto exit_options; | |
1545 | } | |
1546 | ||
f472090a JG |
1547 | if (create_lttng_rundir()) { |
1548 | retval = -1; | |
1549 | goto exit_options; | |
1550 | } | |
1551 | ||
1552 | /* Abort launch if a session daemon is already running. */ | |
1553 | if (check_existing_daemon()) { | |
1554 | ERR("A session daemon is already running."); | |
1555 | retval = -1; | |
1556 | goto exit_options; | |
1557 | } | |
1558 | ||
fac6795d | 1559 | /* Daemonize */ |
412d7227 | 1560 | if (the_config.daemonize || the_config.background) { |
ceed52b5 MD |
1561 | int i; |
1562 | ||
412d7227 SM |
1563 | ret = lttng_daemonize(&the_child_ppid, &recv_child_signal, |
1564 | !the_config.background); | |
53094c05 | 1565 | if (ret < 0) { |
4a15001e MD |
1566 | retval = -1; |
1567 | goto exit_options; | |
53094c05 | 1568 | } |
0bb7724a | 1569 | |
ceed52b5 | 1570 | /* |
0bb7724a | 1571 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 1572 | * closed, in case we are called with more opened file |
f472090a | 1573 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
1574 | */ |
1575 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
1576 | if (i == lockfile_fd) { |
1577 | continue; | |
1578 | } | |
ceed52b5 MD |
1579 | (void) close(i); |
1580 | } | |
1581 | } | |
1582 | ||
929f71ec | 1583 | if (launch_run_as_worker(argv[0]) < 0) { |
7567352f MD |
1584 | goto exit_create_run_as_worker_cleanup; |
1585 | } | |
1586 | ||
4a15001e MD |
1587 | /* |
1588 | * Starting from here, we can create threads. This needs to be after | |
1589 | * lttng_daemonize due to RCU. | |
1590 | */ | |
1591 | ||
1592 | /* | |
1593 | * Initialize the health check subsystem. This call should set the | |
1594 | * appropriate time values. | |
1595 | */ | |
412d7227 SM |
1596 | the_health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
1597 | if (!the_health_sessiond) { | |
4a15001e MD |
1598 | PERROR("health_app_create error"); |
1599 | retval = -1; | |
0d64e8fb | 1600 | goto stop_threads; |
4a15001e MD |
1601 | } |
1602 | ||
4a15001e | 1603 | /* Create thread to clean up RCU hash tables */ |
a3707772 JG |
1604 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
1605 | if (!ht_cleanup_thread) { | |
4a15001e | 1606 | retval = -1; |
0d64e8fb | 1607 | goto stop_threads; |
4a15001e MD |
1608 | } |
1609 | ||
ceed52b5 | 1610 | /* Create thread quit pipe */ |
a7333da7 | 1611 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e | 1612 | retval = -1; |
0d64e8fb | 1613 | goto stop_threads; |
fac6795d DG |
1614 | } |
1615 | ||
1616 | /* Check if daemon is UID = 0 */ | |
1617 | is_root = !getuid(); | |
fac6795d | 1618 | if (is_root) { |
67e40797 | 1619 | /* Create global run dir with root access */ |
67e40797 | 1620 | |
b3530820 JG |
1621 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
1622 | if (!kernel_channel_monitor_pipe) { | |
1623 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
1624 | retval = -1; | |
0d64e8fb | 1625 | goto stop_threads; |
b3530820 | 1626 | } |
412d7227 | 1627 | the_kconsumer_data.channel_monitor_pipe = |
b3530820 | 1628 | lttng_pipe_release_writefd( |
412d7227 SM |
1629 | kernel_channel_monitor_pipe); |
1630 | if (the_kconsumer_data.channel_monitor_pipe < 0) { | |
b3530820 | 1631 | retval = -1; |
0d64e8fb | 1632 | goto stop_threads; |
b3530820 | 1633 | } |
fac6795d DG |
1634 | } |
1635 | ||
5c827ce0 | 1636 | /* Set consumer initial state */ |
412d7227 SM |
1637 | the_kernel_consumerd_state = CONSUMER_STOPPED; |
1638 | the_ust_consumerd_state = CONSUMER_STOPPED; | |
5c827ce0 | 1639 | |
b3530820 JG |
1640 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
1641 | if (!ust32_channel_monitor_pipe) { | |
1642 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
1643 | retval = -1; | |
0d64e8fb | 1644 | goto stop_threads; |
b3530820 | 1645 | } |
412d7227 SM |
1646 | the_ustconsumer32_data.channel_monitor_pipe = |
1647 | lttng_pipe_release_writefd(ust32_channel_monitor_pipe); | |
1648 | if (the_ustconsumer32_data.channel_monitor_pipe < 0) { | |
b3530820 | 1649 | retval = -1; |
0d64e8fb | 1650 | goto stop_threads; |
b3530820 | 1651 | } |
62c43103 | 1652 | |
d086f507 | 1653 | /* |
92816cc3 JG |
1654 | * The rotation_thread_timer_queue structure is shared between the |
1655 | * sessiond timer thread and the rotation thread. The main thread keeps | |
1656 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 1657 | */ |
92816cc3 | 1658 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
1659 | if (!rotation_timer_queue) { |
1660 | retval = -1; | |
0d64e8fb | 1661 | goto stop_threads; |
d086f507 | 1662 | } |
bc26e826 JG |
1663 | timer_thread_parameters.rotation_thread_job_queue = |
1664 | rotation_timer_queue; | |
67e40797 | 1665 | |
b3530820 JG |
1666 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
1667 | if (!ust64_channel_monitor_pipe) { | |
1668 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
1669 | retval = -1; | |
0d64e8fb | 1670 | goto stop_threads; |
b3530820 | 1671 | } |
412d7227 SM |
1672 | the_ustconsumer64_data.channel_monitor_pipe = |
1673 | lttng_pipe_release_writefd(ust64_channel_monitor_pipe); | |
1674 | if (the_ustconsumer64_data.channel_monitor_pipe < 0) { | |
b3530820 | 1675 | retval = -1; |
0d64e8fb | 1676 | goto stop_threads; |
b3530820 | 1677 | } |
847177cd | 1678 | |
1427f9b2 DG |
1679 | /* |
1680 | * Init UST app hash table. Alloc hash table before this point since | |
1681 | * cleanup() can get called after that point. | |
1682 | */ | |
4a15001e | 1683 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 1684 | ERR("Failed to allocate UST app hash table"); |
4a15001e | 1685 | retval = -1; |
0d64e8fb | 1686 | goto stop_threads; |
4a15001e | 1687 | } |
1427f9b2 | 1688 | |
761ffce2 FD |
1689 | event_notifier_error_accounting_status = event_notifier_error_accounting_init( |
1690 | the_config.event_notifier_buffer_size_kernel, | |
1691 | the_config.event_notifier_buffer_size_userspace); | |
1692 | if (event_notifier_error_accounting_status != EVENT_NOTIFIER_ERROR_ACCOUNTING_STATUS_OK) { | |
1693 | ERR("Failed to initialize event notifier error accounting system"); | |
1694 | retval = -1; | |
1695 | goto stop_threads; | |
1696 | } | |
90aa04a1 | 1697 | |
6a4e4039 JG |
1698 | /* |
1699 | * Initialize agent app hash table. We allocate the hash table here | |
1700 | * since cleanup() can get called after this point. | |
1701 | */ | |
1702 | if (agent_app_ht_alloc()) { | |
1703 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e | 1704 | retval = -1; |
0d64e8fb | 1705 | goto stop_threads; |
f20baf8e DG |
1706 | } |
1707 | ||
44760c20 JR |
1708 | if (agent_by_event_notifier_domain_ht_create()) { |
1709 | ERR("Failed to allocate per-event notifier domain agent hash table"); | |
1710 | retval = -1; | |
1711 | goto stop_threads; | |
1712 | } | |
a88df331 DG |
1713 | /* |
1714 | * These actions must be executed as root. We do that *after* setting up | |
1715 | * the sockets path because we MUST make the check for another daemon using | |
1716 | * those paths *before* trying to set the kernel consumer sockets and init | |
1717 | * kernel tracer. | |
1718 | */ | |
1719 | if (is_root) { | |
412d7227 | 1720 | if (set_consumer_sockets(&the_kconsumer_data)) { |
4a15001e | 1721 | retval = -1; |
0d64e8fb | 1722 | goto stop_threads; |
7753dea8 MD |
1723 | } |
1724 | ||
a88df331 | 1725 | /* Setup kernel tracer */ |
412d7227 | 1726 | if (!the_config.no_kernel) { |
4fba7219 DG |
1727 | init_kernel_tracer(); |
1728 | } | |
a88df331 DG |
1729 | |
1730 | /* Set ulimit for open files */ | |
1731 | set_ulimit(); | |
fac6795d | 1732 | } |
4063050c MD |
1733 | /* init lttng_fd tracking must be done after set_ulimit. */ |
1734 | lttng_fd_init(); | |
fac6795d | 1735 | |
412d7227 | 1736 | if (set_consumer_sockets(&the_ustconsumer64_data)) { |
4a15001e | 1737 | retval = -1; |
0d64e8fb | 1738 | goto stop_threads; |
67e40797 DG |
1739 | } |
1740 | ||
412d7227 | 1741 | if (set_consumer_sockets(&the_ustconsumer32_data)) { |
4a15001e | 1742 | retval = -1; |
0d64e8fb | 1743 | goto stop_threads; |
67e40797 DG |
1744 | } |
1745 | ||
5b8719f5 | 1746 | /* Get parent pid if -S, --sig-parent is specified. */ |
412d7227 SM |
1747 | if (the_config.sig_parent) { |
1748 | the_ppid = getppid(); | |
5b8719f5 DG |
1749 | } |
1750 | ||
7a485870 | 1751 | /* Setup the kernel pipe for waking up the kernel thread */ |
412d7227 SM |
1752 | if (is_root && !the_config.no_kernel) { |
1753 | if (utils_create_pipe_cloexec(the_kernel_poll_pipe)) { | |
4a15001e | 1754 | retval = -1; |
0d64e8fb | 1755 | goto stop_threads; |
6620da75 | 1756 | } |
7a485870 DG |
1757 | } |
1758 | ||
099e26bd | 1759 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
1760 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
1761 | retval = -1; | |
0d64e8fb | 1762 | goto stop_threads; |
099e26bd DG |
1763 | } |
1764 | ||
d0b96690 | 1765 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
1766 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
1767 | retval = -1; | |
0d64e8fb | 1768 | goto stop_threads; |
d0b96690 DG |
1769 | } |
1770 | ||
7972aab2 DG |
1771 | /* Initialize global buffer per UID and PID registry. */ |
1772 | buffer_reg_init_uid_registry(); | |
1773 | buffer_reg_init_pid_registry(); | |
1774 | ||
099e26bd | 1775 | /* Init UST command queue. */ |
8bdee6e2 | 1776 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1777 | |
2f77fc4b | 1778 | cmd_init(); |
00e2e675 | 1779 | |
ae9e45b3 DG |
1780 | /* Check for the application socket timeout env variable. */ |
1781 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
1782 | if (env_app_timeout) { | |
412d7227 | 1783 | the_config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 1784 | } else { |
412d7227 | 1785 | the_config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
1786 | } |
1787 | ||
4a15001e MD |
1788 | ret = write_pidfile(); |
1789 | if (ret) { | |
1790 | ERR("Error in write_pidfile"); | |
1791 | retval = -1; | |
0d64e8fb | 1792 | goto stop_threads; |
4a15001e | 1793 | } |
35f90c40 | 1794 | |
554831e7 MD |
1795 | /* Initialize communication library */ |
1796 | lttcomm_init(); | |
4a15001e | 1797 | /* Initialize TCP timeout values */ |
d831c249 | 1798 | lttcomm_inet_init(); |
554831e7 | 1799 | |
12b4fb37 | 1800 | /* Create health-check thread. */ |
173fca4f | 1801 | if (!launch_health_management_thread()) { |
4a15001e | 1802 | retval = -1; |
0d64e8fb | 1803 | goto stop_threads; |
44a5e5eb DG |
1804 | } |
1805 | ||
b3530820 | 1806 | /* notification_thread_data acquires the pipes' read side. */ |
412d7227 SM |
1807 | the_notification_thread_handle = notification_thread_handle_create( |
1808 | ust32_channel_monitor_pipe, ust64_channel_monitor_pipe, | |
c8a9de5a | 1809 | kernel_channel_monitor_pipe); |
412d7227 | 1810 | if (!the_notification_thread_handle) { |
b3530820 JG |
1811 | retval = -1; |
1812 | ERR("Failed to create notification thread shared data"); | |
0d64e8fb | 1813 | goto stop_threads; |
b3530820 JG |
1814 | } |
1815 | ||
1816 | /* Create notification thread. */ | |
4a91420c | 1817 | notification_thread = launch_notification_thread( |
412d7227 | 1818 | the_notification_thread_handle); |
4a91420c | 1819 | if (!notification_thread) { |
b3530820 | 1820 | retval = -1; |
0d64e8fb | 1821 | goto stop_threads; |
b3530820 JG |
1822 | } |
1823 | ||
d086f507 | 1824 | /* Create timer thread. */ |
bc26e826 | 1825 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 1826 | retval = -1; |
0d64e8fb | 1827 | goto stop_threads; |
d086f507 | 1828 | } |
d086f507 | 1829 | |
db66e574 JD |
1830 | /* rotation_thread_data acquires the pipes' read side. */ |
1831 | rotation_thread_handle = rotation_thread_handle_create( | |
412d7227 | 1832 | rotation_timer_queue, the_notification_thread_handle); |
db66e574 JD |
1833 | if (!rotation_thread_handle) { |
1834 | retval = -1; | |
1835 | ERR("Failed to create rotation thread shared data"); | |
1836 | stop_threads(); | |
0d64e8fb | 1837 | goto stop_threads; |
db66e574 | 1838 | } |
db66e574 JD |
1839 | |
1840 | /* Create rotation thread. */ | |
64d9b072 | 1841 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 1842 | retval = -1; |
0d64e8fb | 1843 | goto stop_threads; |
db66e574 JD |
1844 | } |
1845 | ||
cf3af59e | 1846 | /* Create thread to manage the client socket */ |
917a718d JG |
1847 | client_thread = launch_client_thread(); |
1848 | if (!client_thread) { | |
4a15001e | 1849 | retval = -1; |
0d64e8fb | 1850 | goto stop_threads; |
cf3af59e | 1851 | } |
fac6795d | 1852 | |
308df7bb | 1853 | /* Set credentials of the client socket and rundir */ |
412d7227 | 1854 | if (is_root && set_permissions(the_config.rundir.value)) { |
308df7bb JG |
1855 | retval = -1; |
1856 | goto stop_threads; | |
1857 | } | |
1858 | ||
5d1b0219 JG |
1859 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], |
1860 | apps_cmd_notify_pipe[1])) { | |
4a15001e | 1861 | retval = -1; |
0d64e8fb | 1862 | goto stop_threads; |
099e26bd DG |
1863 | } |
1864 | ||
1865 | /* Create thread to manage application registration. */ | |
bd9addf7 JG |
1866 | register_apps_thread = launch_application_registration_thread( |
1867 | &ust_cmd_queue); | |
1868 | if (!register_apps_thread) { | |
4a15001e | 1869 | retval = -1; |
0d64e8fb | 1870 | goto stop_threads; |
099e26bd DG |
1871 | } |
1872 | ||
cf3af59e | 1873 | /* Create thread to manage application socket */ |
7649924e | 1874 | if (!launch_application_management_thread(apps_cmd_pipe[0])) { |
4a15001e | 1875 | retval = -1; |
0d64e8fb | 1876 | goto stop_threads; |
d0b96690 DG |
1877 | } |
1878 | ||
1879 | /* Create thread to manage application notify socket */ | |
971a61c6 | 1880 | if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) { |
4a15001e | 1881 | retval = -1; |
0d64e8fb | 1882 | goto stop_threads; |
cf3af59e | 1883 | } |
fac6795d | 1884 | |
8a7e4590 JG |
1885 | /* Create agent management thread. */ |
1886 | if (!launch_agent_management_thread()) { | |
4a15001e | 1887 | retval = -1; |
0d64e8fb | 1888 | goto stop_threads; |
4d076222 DG |
1889 | } |
1890 | ||
6620da75 | 1891 | /* Don't start this thread if kernel tracing is not requested nor root */ |
412d7227 | 1892 | if (is_root && !the_config.no_kernel) { |
6620da75 | 1893 | /* Create kernel thread to manage kernel event */ |
412d7227 | 1894 | if (!launch_kernel_management_thread(the_kernel_poll_pipe[0])) { |
4a15001e | 1895 | retval = -1; |
0d64e8fb | 1896 | goto stop_threads; |
6620da75 | 1897 | } |
352b58f5 JR |
1898 | |
1899 | if (kernel_get_notification_fd() >= 0) { | |
1900 | ret = notification_thread_command_add_tracer_event_source( | |
412d7227 | 1901 | the_notification_thread_handle, |
352b58f5 JR |
1902 | kernel_get_notification_fd(), |
1903 | LTTNG_DOMAIN_KERNEL); | |
1904 | if (ret != LTTNG_OK) { | |
1905 | ERR("Failed to add kernel trigger event source to notification thread"); | |
1906 | retval = -1; | |
1907 | goto stop_threads; | |
1908 | } | |
1909 | } | |
ef367a93 | 1910 | } |
7a485870 | 1911 | |
3316b9d6 | 1912 | /* Load sessions. */ |
412d7227 SM |
1913 | ret = config_load_session( |
1914 | the_config.load_session_path.value, NULL, 1, 1, NULL); | |
4a15001e | 1915 | if (ret) { |
3316b9d6 | 1916 | ERR("Session load failed: %s", error_get_str(ret)); |
4a15001e | 1917 | retval = -1; |
0d64e8fb | 1918 | goto stop_threads; |
4a15001e MD |
1919 | } |
1920 | ||
3316b9d6 JG |
1921 | /* Initialization completed. */ |
1922 | sessiond_signal_parents(); | |
1923 | ||
4a15001e MD |
1924 | /* |
1925 | * This is where we start awaiting program completion (e.g. through | |
1926 | * signal that asks threads to teardown). | |
1927 | */ | |
1928 | ||
99d688f2 | 1929 | /* Initiate teardown once activity occurs on the quit pipe. */ |
2d54bfb6 | 1930 | sessiond_wait_for_quit_pipe(-1); |
917a718d | 1931 | |
0d64e8fb | 1932 | stop_threads: |
90aa04a1 | 1933 | |
917a718d JG |
1934 | /* |
1935 | * Ensure that the client thread is no longer accepting new commands, | |
1936 | * which could cause new sessions to be created. | |
1937 | */ | |
0d64e8fb JG |
1938 | if (client_thread) { |
1939 | lttng_thread_shutdown(client_thread); | |
917a718d | 1940 | lttng_thread_put(client_thread); |
917a718d JG |
1941 | } |
1942 | ||
99d688f2 | 1943 | destroy_all_sessions_and_wait(); |
0d64e8fb | 1944 | |
b69a1b40 JG |
1945 | /* |
1946 | * At this point no new trigger can be registered (no sessions are | |
1947 | * running/rotating) and clients can't connect to the session daemon | |
1948 | * anymore. Unregister all triggers. | |
1949 | */ | |
1950 | unregister_all_triggers(); | |
1951 | ||
bd9addf7 JG |
1952 | if (register_apps_thread) { |
1953 | lttng_thread_shutdown(register_apps_thread); | |
1954 | lttng_thread_put(register_apps_thread); | |
1955 | } | |
a3707772 | 1956 | lttng_thread_list_shutdown_orphans(); |
917a718d | 1957 | |
4d62fbf8 MD |
1958 | /* |
1959 | * Wait for all pending call_rcu work to complete before tearing | |
1960 | * down data structures. call_rcu worker may be trying to | |
1961 | * perform lookups in those structures. | |
1962 | */ | |
1963 | rcu_barrier(); | |
4a15001e MD |
1964 | /* |
1965 | * sessiond_cleanup() is called when no other thread is running, except | |
1966 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
1967 | */ | |
1968 | rcu_thread_online(); | |
1969 | sessiond_cleanup(); | |
06f525de | 1970 | |
3b8a092f | 1971 | /* |
1d25334c | 1972 | * Wait for all pending call_rcu work to complete before shutting down |
3b8a092f FD |
1973 | * the notification thread. This call_rcu work includes shutting down |
1974 | * UST apps and event notifier pipes. | |
1975 | */ | |
1976 | rcu_barrier(); | |
1977 | ||
4a91420c JG |
1978 | if (notification_thread) { |
1979 | lttng_thread_shutdown(notification_thread); | |
1980 | lttng_thread_put(notification_thread); | |
1981 | } | |
1982 | ||
90aa04a1 | 1983 | /* |
1d25334c FD |
1984 | * Error accounting teardown has to be done after the teardown of all |
1985 | * event notifier pipes to ensure that no tracer may try to use the | |
1986 | * error accounting facilities. | |
90aa04a1 FD |
1987 | */ |
1988 | event_notifier_error_accounting_fini(); | |
1989 | ||
1d25334c FD |
1990 | /* |
1991 | * Unloading the kernel modules needs to be done after all kernel | |
1992 | * ressources have been released. In our case, this includes the | |
1993 | * notification fd, the event notifier group fd, error accounting fd, | |
1994 | * all event and event notifier fds, etc. | |
1995 | * | |
1996 | * In short, at this point, we need to have called close() on all fds | |
1997 | * received from the kernel tracer. | |
1998 | */ | |
412d7227 | 1999 | if (is_root && !the_config.no_kernel) { |
1d25334c FD |
2000 | DBG("Unloading kernel modules"); |
2001 | modprobe_remove_lttng_all(); | |
2002 | } | |
2003 | ||
c4d5de9d JG |
2004 | /* |
2005 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
2006 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
2007 | * the queue is empty before shutting down the clean-up thread. | |
2008 | */ | |
2009 | rcu_barrier(); | |
2010 | ||
a3707772 JG |
2011 | if (ht_cleanup_thread) { |
2012 | lttng_thread_shutdown(ht_cleanup_thread); | |
2013 | lttng_thread_put(ht_cleanup_thread); | |
2014 | } | |
2015 | ||
64d9b072 JG |
2016 | rcu_thread_offline(); |
2017 | rcu_unregister_thread(); | |
2018 | ||
2019 | if (rotation_thread_handle) { | |
2020 | rotation_thread_handle_destroy(rotation_thread_handle); | |
2021 | } | |
2022 | ||
d086f507 JD |
2023 | /* |
2024 | * After the rotation and timer thread have quit, we can safely destroy | |
2025 | * the rotation_timer_queue. | |
2026 | */ | |
92816cc3 | 2027 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
c8a9de5a JG |
2028 | /* |
2029 | * The teardown of the notification system is performed after the | |
2030 | * session daemon's teardown in order to allow it to be notified | |
2031 | * of the active session and channels at the moment of the teardown. | |
2032 | */ | |
412d7227 SM |
2033 | if (the_notification_thread_handle) { |
2034 | notification_thread_handle_destroy( | |
2035 | the_notification_thread_handle); | |
c8a9de5a | 2036 | } |
b3530820 JG |
2037 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
2038 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
2039 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
4a15001e | 2040 | |
412d7227 SM |
2041 | if (the_health_sessiond) { |
2042 | health_app_destroy(the_health_sessiond); | |
9bc2ec5f | 2043 | } |
7567352f | 2044 | exit_create_run_as_worker_cleanup: |
4a15001e | 2045 | exit_options: |
f472090a | 2046 | sessiond_cleanup_lock_file(); |
4a15001e MD |
2047 | sessiond_cleanup_options(); |
2048 | ||
2049 | exit_set_signal_handler: | |
2050 | if (!retval) { | |
cf3af59e | 2051 | exit(EXIT_SUCCESS); |
4a15001e MD |
2052 | } else { |
2053 | exit(EXIT_FAILURE); | |
67e40797 | 2054 | } |
fac6795d | 2055 | } |