Commit | Line | Data |
---|---|---|
826d496d | 1 | /* |
ab5be9fa MJ |
2 | * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca> |
3 | * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
4 | * Copyright (C) 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> | |
fac6795d | 5 | * |
ab5be9fa | 6 | * SPDX-License-Identifier: GPL-2.0-only |
91d76f53 | 7 | * |
fac6795d DG |
8 | */ |
9 | ||
6c1c0768 | 10 | #define _LGPL_SOURCE |
fac6795d DG |
11 | #include <getopt.h> |
12 | #include <grp.h> | |
13 | #include <limits.h> | |
0bb7724a | 14 | #include <paths.h> |
fac6795d DG |
15 | #include <pthread.h> |
16 | #include <signal.h> | |
17 | #include <stdio.h> | |
18 | #include <stdlib.h> | |
19 | #include <string.h> | |
331744e3 | 20 | #include <inttypes.h> |
0fdd1e2c | 21 | #include <sys/mman.h> |
b73401da | 22 | #include <sys/mount.h> |
1e307fab | 23 | #include <sys/resource.h> |
fac6795d DG |
24 | #include <sys/socket.h> |
25 | #include <sys/stat.h> | |
26 | #include <sys/types.h> | |
0fdd1e2c | 27 | #include <sys/wait.h> |
5c827ce0 | 28 | #include <urcu/uatomic.h> |
fac6795d | 29 | #include <unistd.h> |
4f0b90ee | 30 | #include <ctype.h> |
fac6795d | 31 | |
990570ed | 32 | #include <common/common.h> |
d27c42b8 | 33 | #include <common/compat/socket.h> |
e8fa9fb0 | 34 | #include <common/compat/getenv.h> |
db758600 DG |
35 | #include <common/defaults.h> |
36 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 37 | #include <common/futex.h> |
00e2e675 | 38 | #include <common/relayd/relayd.h> |
81b86775 | 39 | #include <common/utils.h> |
3ccdf997 | 40 | #include <common/daemonize.h> |
f40ef1d5 | 41 | #include <common/config/session-config.h> |
dcabc190 | 42 | #include <common/dynamic-buffer.h> |
76fcf151 | 43 | #include <lttng/event-internal.h> |
fac6795d | 44 | |
10a8a223 | 45 | #include "lttng-sessiond.h" |
7972aab2 | 46 | #include "buffer-registry.h" |
54d01ffb | 47 | #include "channel.h" |
2f77fc4b | 48 | #include "cmd.h" |
00e2e675 | 49 | #include "consumer.h" |
099e26bd | 50 | #include "context.h" |
54d01ffb | 51 | #include "event.h" |
90aa04a1 | 52 | #include "event-notifier-error-accounting.h" |
4771f025 | 53 | #include "kernel.h" |
f1e16794 | 54 | #include "kernel-consumer.h" |
75018ab6 | 55 | #include "lttng-ust-ctl.h" |
00e2e675 | 56 | #include "ust-consumer.h" |
8e68d1c8 | 57 | #include "utils.h" |
4063050c | 58 | #include "fd-limit.h" |
8782cc74 | 59 | #include "health-sessiond.h" |
8ac94142 | 60 | #include "testpoint.h" |
f9d2ba6a | 61 | #include "notify-apps.h" |
022d91ba | 62 | #include "agent-thread.h" |
fb198a11 | 63 | #include "save.h" |
b3530820 JG |
64 | #include "notification-thread.h" |
65 | #include "notification-thread-commands.h" | |
db66e574 | 66 | #include "rotation-thread.h" |
7c1d2758 | 67 | #include "agent.h" |
5e97de00 | 68 | #include "ht-cleanup.h" |
e6142f2e | 69 | #include "sessiond-config.h" |
8e319828 | 70 | #include "timer.h" |
a3707772 | 71 | #include "thread.h" |
917a718d | 72 | #include "client.h" |
5d1b0219 | 73 | #include "dispatch.h" |
1785d7f2 | 74 | #include "register.h" |
7649924e | 75 | #include "manage-apps.h" |
5b093681 | 76 | #include "manage-kernel.h" |
1d25334c | 77 | #include "modprobe.h" |
ebaeda94 | 78 | |
4fc83d94 PP |
79 | static const char *help_msg = |
80 | #ifdef LTTNG_EMBED_HELP | |
81 | #include <lttng-sessiond.8.h> | |
82 | #else | |
83 | NULL | |
84 | #endif | |
85 | ; | |
86 | ||
90aa04a1 FD |
87 | #define EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX 65535 |
88 | ||
fac6795d | 89 | const char *progname; |
c9cb3e7d | 90 | static int lockfile_fd = -1; |
a3bc3918 | 91 | static int opt_print_version; |
3bd1e081 | 92 | |
0bb7724a DG |
93 | /* Set to 1 when a SIGUSR1 signal is received. */ |
94 | static int recv_child_signal; | |
95 | ||
26296c48 JG |
96 | /* Command line options */ |
97 | static const struct option long_options[] = { | |
0f5ea17c JG |
98 | { "client-sock", required_argument, 0, 'c' }, |
99 | { "apps-sock", required_argument, 0, 'a' }, | |
100 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
101 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
102 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
103 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
104 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
105 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
106 | { "consumerd32-path", required_argument, 0, '\0' }, | |
107 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
108 | { "consumerd64-path", required_argument, 0, '\0' }, | |
109 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
110 | { "daemonize", no_argument, 0, 'd' }, | |
111 | { "background", no_argument, 0, 'b' }, | |
112 | { "sig-parent", no_argument, 0, 'S' }, | |
113 | { "help", no_argument, 0, 'h' }, | |
114 | { "group", required_argument, 0, 'g' }, | |
115 | { "version", no_argument, 0, 'V' }, | |
116 | { "quiet", no_argument, 0, 'q' }, | |
117 | { "verbose", no_argument, 0, 'v' }, | |
118 | { "verbose-consumer", no_argument, 0, '\0' }, | |
119 | { "no-kernel", no_argument, 0, '\0' }, | |
120 | { "pidfile", required_argument, 0, 'p' }, | |
121 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
122 | { "config", required_argument, 0, 'f' }, | |
123 | { "load", required_argument, 0, 'l' }, | |
124 | { "kmod-probes", required_argument, 0, '\0' }, | |
125 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
90aa04a1 | 126 | { "event-notifier-error-number-of-bucket", required_argument, 0, '\0' }, |
26296c48 JG |
127 | { NULL, 0, 0, 0 } |
128 | }; | |
129 | ||
130 | /* Command line options to ignore from configuration file */ | |
131 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
1d4b027a | 132 | |
099e26bd DG |
133 | /* |
134 | * This pipe is used to inform the thread managing application communication | |
135 | * that a command is queued and ready to be processed. | |
136 | */ | |
76d7553f | 137 | static int apps_cmd_pipe[2] = { -1, -1 }; |
971a61c6 | 138 | static int apps_cmd_notify_pipe[2] = { -1, -1 }; |
099e26bd | 139 | |
099e26bd DG |
140 | /* |
141 | * UST registration command queue. This queue is tied with a futex and uses a N | |
142 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
143 | * | |
b22c5da8 DG |
144 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
145 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
146 | * the line new application socket and monitors it for any I/O error or clean | |
147 | * close that triggers an unregistration of the application. | |
099e26bd DG |
148 | */ |
149 | static struct ust_cmd_queue ust_cmd_queue; | |
150 | ||
97bc1426 | 151 | /* |
a7333da7 | 152 | * Section name to look for in the daemon configuration file. |
97bc1426 | 153 | */ |
a7333da7 | 154 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 155 | |
a7333da7 JG |
156 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
157 | static int is_root; | |
5eb91c98 | 158 | |
099e26bd DG |
159 | /* |
160 | * Stop all threads by closing the thread quit pipe. | |
161 | */ | |
cf3af59e MD |
162 | static void stop_threads(void) |
163 | { | |
5eb91c98 DG |
164 | int ret; |
165 | ||
cf3af59e MD |
166 | /* Stopping all threads */ |
167 | DBG("Terminating all threads"); | |
a7333da7 | 168 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
169 | if (ret < 0) { |
170 | ERR("write error on thread quit pipe"); | |
171 | } | |
cf3af59e MD |
172 | } |
173 | ||
e975f9f8 DG |
174 | /* |
175 | * Close every consumer sockets. | |
176 | */ | |
177 | static void close_consumer_sockets(void) | |
178 | { | |
179 | int ret; | |
180 | ||
181 | if (kconsumer_data.err_sock >= 0) { | |
182 | ret = close(kconsumer_data.err_sock); | |
183 | if (ret < 0) { | |
184 | PERROR("kernel consumer err_sock close"); | |
185 | } | |
186 | } | |
187 | if (ustconsumer32_data.err_sock >= 0) { | |
188 | ret = close(ustconsumer32_data.err_sock); | |
189 | if (ret < 0) { | |
a76cbd9f | 190 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
191 | } |
192 | } | |
193 | if (ustconsumer64_data.err_sock >= 0) { | |
194 | ret = close(ustconsumer64_data.err_sock); | |
195 | if (ret < 0) { | |
a76cbd9f | 196 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
197 | } |
198 | } | |
199 | if (kconsumer_data.cmd_sock >= 0) { | |
200 | ret = close(kconsumer_data.cmd_sock); | |
201 | if (ret < 0) { | |
202 | PERROR("kernel consumer cmd_sock close"); | |
203 | } | |
204 | } | |
205 | if (ustconsumer32_data.cmd_sock >= 0) { | |
206 | ret = close(ustconsumer32_data.cmd_sock); | |
207 | if (ret < 0) { | |
a76cbd9f | 208 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
209 | } |
210 | } | |
211 | if (ustconsumer64_data.cmd_sock >= 0) { | |
212 | ret = close(ustconsumer64_data.cmd_sock); | |
213 | if (ret < 0) { | |
a76cbd9f | 214 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
215 | } |
216 | } | |
b3530820 JG |
217 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
218 | ret = close(kconsumer_data.channel_monitor_pipe); | |
219 | if (ret < 0) { | |
220 | PERROR("kernel consumer channel monitor pipe close"); | |
221 | } | |
222 | } | |
223 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
224 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
225 | if (ret < 0) { | |
226 | PERROR("UST consumerd32 channel monitor pipe close"); | |
227 | } | |
228 | } | |
229 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
230 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
231 | if (ret < 0) { | |
232 | PERROR("UST consumerd64 channel monitor pipe close"); | |
233 | } | |
234 | } | |
e975f9f8 DG |
235 | } |
236 | ||
4e4714cb JR |
237 | /* |
238 | * Wait on consumer process termination. | |
239 | * | |
240 | * Need to be called with the consumer data lock held or from a context | |
241 | * ensuring no concurrent access to data (e.g: cleanup). | |
242 | */ | |
243 | static void wait_consumer(struct consumer_data *consumer_data) | |
244 | { | |
245 | pid_t ret; | |
246 | int status; | |
247 | ||
248 | if (consumer_data->pid <= 0) { | |
249 | return; | |
250 | } | |
251 | ||
252 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
253 | consumer_data->pid); | |
254 | ret = waitpid(consumer_data->pid, &status, 0); | |
255 | if (ret == -1) { | |
256 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 257 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
258 | ERR("consumerd termination with error: %d", |
259 | WEXITSTATUS(ret)); | |
260 | } | |
261 | consumer_data->pid = 0; | |
262 | } | |
263 | ||
fac6795d | 264 | /* |
4a15001e | 265 | * Cleanup the session daemon's data structures. |
fac6795d | 266 | */ |
4a15001e | 267 | static void sessiond_cleanup(void) |
fac6795d | 268 | { |
ef599319 | 269 | int ret; |
e32d7f27 | 270 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 271 | |
4a15001e | 272 | DBG("Cleanup sessiond"); |
e07ae692 | 273 | |
4e449f3f MD |
274 | /* |
275 | * Close the thread quit pipe. It has already done its job, | |
276 | * since we are now called. | |
277 | */ | |
a7333da7 | 278 | sessiond_close_quit_pipe(); |
971a61c6 JG |
279 | utils_close_pipe(apps_cmd_pipe); |
280 | utils_close_pipe(apps_cmd_notify_pipe); | |
5b093681 | 281 | utils_close_pipe(kernel_poll_pipe); |
2f77fc4b | 282 | |
c9a2957d JG |
283 | ret = remove(config.pid_file_path.value); |
284 | if (ret < 0) { | |
285 | PERROR("remove pidfile %s", config.pid_file_path.value); | |
35f90c40 DG |
286 | } |
287 | ||
e6142f2e JG |
288 | DBG("Removing sessiond and consumerd content of directory %s", |
289 | config.rundir.value); | |
8c6c56c2 MD |
290 | |
291 | /* sessiond */ | |
e6142f2e JG |
292 | DBG("Removing %s", config.pid_file_path.value); |
293 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 294 | |
e6142f2e JG |
295 | DBG("Removing %s", config.agent_port_file_path.value); |
296 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 297 | |
8c6c56c2 | 298 | /* kconsumerd */ |
e6142f2e JG |
299 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
300 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
301 | ||
302 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
303 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
304 | |
305 | /* ust consumerd 32 */ | |
e6142f2e JG |
306 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
307 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
308 | ||
309 | DBG("Removing directory %s", config.consumerd32_path.value); | |
310 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
311 | |
312 | /* ust consumerd 64 */ | |
e6142f2e JG |
313 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
314 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
315 | ||
316 | DBG("Removing directory %s", config.consumerd64_path.value); | |
317 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 318 | |
99d688f2 | 319 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 320 | |
44760c20 JR |
321 | DBG("Cleaning up all per-event notifier domain agents"); |
322 | agent_by_event_notifier_domain_ht_destroy(); | |
323 | ||
6a4e4039 JG |
324 | DBG("Cleaning up all agent apps"); |
325 | agent_app_ht_clean(); | |
099e26bd | 326 | DBG("Closing all UST sockets"); |
56fff090 | 327 | ust_app_clean_list(); |
7972aab2 | 328 | buffer_reg_destroy_registries(); |
099e26bd | 329 | |
0787fc4b MD |
330 | close_consumer_sockets(); |
331 | ||
332 | wait_consumer(&kconsumer_data); | |
333 | wait_consumer(&ustconsumer64_data); | |
334 | wait_consumer(&ustconsumer32_data); | |
335 | ||
e6142f2e | 336 | if (is_root && !config.no_kernel) { |
7d268848 | 337 | cleanup_kernel_tracer(); |
2f50c8a3 | 338 | } |
2f77fc4b | 339 | |
c9cb3e7d JG |
340 | /* |
341 | * We do NOT rmdir rundir because there are other processes | |
342 | * using it, for instance lttng-relayd, which can start in | |
343 | * parallel with this teardown. | |
344 | */ | |
4a15001e MD |
345 | } |
346 | ||
347 | /* | |
348 | * Cleanup the daemon's option data structures. | |
349 | */ | |
350 | static void sessiond_cleanup_options(void) | |
351 | { | |
352 | DBG("Cleaning up options"); | |
353 | ||
e6142f2e | 354 | sessiond_config_fini(&config); |
c9cb3e7d | 355 | |
7567352f | 356 | run_as_destroy_worker(); |
fac6795d DG |
357 | } |
358 | ||
917a718d | 359 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 360 | { |
917a718d | 361 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
362 | } |
363 | ||
00e2e675 | 364 | /* |
917a718d JG |
365 | * Take an option from the getopt output and set it in the right variable to be |
366 | * used later. | |
36b588ed | 367 | * |
917a718d | 368 | * Return 0 on success else a negative value. |
00e2e675 | 369 | */ |
917a718d | 370 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 371 | { |
917a718d | 372 | int ret = 0; |
fac6795d | 373 | |
c0232ea5 | 374 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
375 | if (!arg || *arg == '\0') { |
376 | ret = -EINVAL; | |
377 | goto end; | |
378 | } | |
e8fa9fb0 MD |
379 | if (lttng_is_setuid_setgid()) { |
380 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
381 | "-c, --client-sock"); | |
382 | } else { | |
e6142f2e JG |
383 | config_string_set(&config.client_unix_sock_path, |
384 | strdup(arg)); | |
385 | if (!config.client_unix_sock_path.value) { | |
386 | ret = -ENOMEM; | |
387 | PERROR("strdup"); | |
388 | } | |
e8fa9fb0 | 389 | } |
c0232ea5 | 390 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
391 | if (!arg || *arg == '\0') { |
392 | ret = -EINVAL; | |
393 | goto end; | |
394 | } | |
e8fa9fb0 MD |
395 | if (lttng_is_setuid_setgid()) { |
396 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
397 | "-a, --apps-sock"); | |
398 | } else { | |
e6142f2e JG |
399 | config_string_set(&config.apps_unix_sock_path, |
400 | strdup(arg)); | |
401 | if (!config.apps_unix_sock_path.value) { | |
402 | ret = -ENOMEM; | |
403 | PERROR("strdup"); | |
404 | } | |
e8fa9fb0 | 405 | } |
c0232ea5 | 406 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 407 | config.daemonize = true; |
c0232ea5 | 408 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 409 | config.background = true; |
c0232ea5 | 410 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
411 | if (!arg || *arg == '\0') { |
412 | ret = -EINVAL; | |
413 | goto end; | |
414 | } | |
e8fa9fb0 MD |
415 | if (lttng_is_setuid_setgid()) { |
416 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
417 | "-g, --group"); | |
418 | } else { | |
e6142f2e JG |
419 | config_string_set(&config.tracing_group_name, |
420 | strdup(arg)); | |
421 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 422 | ret = -ENOMEM; |
e6142f2e | 423 | PERROR("strdup"); |
e8fa9fb0 | 424 | } |
db322c4d | 425 | } |
c0232ea5 | 426 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 427 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 428 | if (ret) { |
4fc83d94 | 429 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
430 | perror("exec"); |
431 | } | |
432 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 433 | } else if (string_match(optname, "version") || opt == 'V') { |
a3bc3918 | 434 | opt_print_version = 1; |
c0232ea5 | 435 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 436 | config.sig_parent = true; |
c0232ea5 | 437 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
438 | if (!arg || *arg == '\0') { |
439 | ret = -EINVAL; | |
440 | goto end; | |
441 | } | |
e8fa9fb0 MD |
442 | if (lttng_is_setuid_setgid()) { |
443 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
444 | "--kconsumerd-err-sock"); | |
445 | } else { | |
e6142f2e JG |
446 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
447 | strdup(arg)); | |
448 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
449 | ret = -ENOMEM; | |
450 | PERROR("strdup"); | |
451 | } | |
e8fa9fb0 | 452 | } |
c0232ea5 | 453 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
454 | if (!arg || *arg == '\0') { |
455 | ret = -EINVAL; | |
456 | goto end; | |
457 | } | |
e8fa9fb0 MD |
458 | if (lttng_is_setuid_setgid()) { |
459 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
460 | "--kconsumerd-cmd-sock"); | |
461 | } else { | |
e6142f2e JG |
462 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
463 | strdup(arg)); | |
464 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
465 | ret = -ENOMEM; | |
466 | PERROR("strdup"); | |
467 | } | |
e8fa9fb0 | 468 | } |
c0232ea5 | 469 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
470 | if (!arg || *arg == '\0') { |
471 | ret = -EINVAL; | |
472 | goto end; | |
473 | } | |
e8fa9fb0 MD |
474 | if (lttng_is_setuid_setgid()) { |
475 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
476 | "--ustconsumerd64-err-sock"); | |
477 | } else { | |
e6142f2e JG |
478 | config_string_set(&config.consumerd64_err_unix_sock_path, |
479 | strdup(arg)); | |
480 | if (!config.consumerd64_err_unix_sock_path.value) { | |
481 | ret = -ENOMEM; | |
482 | PERROR("strdup"); | |
483 | } | |
e8fa9fb0 | 484 | } |
c0232ea5 | 485 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
486 | if (!arg || *arg == '\0') { |
487 | ret = -EINVAL; | |
488 | goto end; | |
489 | } | |
e8fa9fb0 MD |
490 | if (lttng_is_setuid_setgid()) { |
491 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
492 | "--ustconsumerd64-cmd-sock"); | |
493 | } else { | |
e6142f2e JG |
494 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
495 | strdup(arg)); | |
496 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
497 | ret = -ENOMEM; | |
498 | PERROR("strdup"); | |
499 | } | |
e8fa9fb0 | 500 | } |
c0232ea5 | 501 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
502 | if (!arg || *arg == '\0') { |
503 | ret = -EINVAL; | |
504 | goto end; | |
505 | } | |
e8fa9fb0 MD |
506 | if (lttng_is_setuid_setgid()) { |
507 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
508 | "--ustconsumerd32-err-sock"); | |
509 | } else { | |
e6142f2e JG |
510 | config_string_set(&config.consumerd32_err_unix_sock_path, |
511 | strdup(arg)); | |
512 | if (!config.consumerd32_err_unix_sock_path.value) { | |
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.", | |
524 | "--ustconsumerd32-cmd-sock"); | |
525 | } else { | |
e6142f2e JG |
526 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
527 | strdup(arg)); | |
528 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
529 | ret = -ENOMEM; | |
530 | PERROR("strdup"); | |
531 | } | |
e8fa9fb0 | 532 | } |
c0232ea5 | 533 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 534 | config.no_kernel = true; |
c0232ea5 | 535 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 536 | config.quiet = true; |
c0232ea5 | 537 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
538 | /* Verbose level can increase using multiple -v */ |
539 | if (arg) { | |
13755a18 | 540 | /* Value obtained from config file */ |
e6142f2e | 541 | config.verbose = config_parse_value(arg); |
26296c48 | 542 | } else { |
13755a18 | 543 | /* -v used on command line */ |
e6142f2e | 544 | config.verbose++; |
26296c48 | 545 | } |
13755a18 | 546 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
547 | config.verbose = config.verbose < 0 ? 0 : |
548 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 549 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 550 | if (arg) { |
e6142f2e | 551 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 552 | } else { |
e6142f2e | 553 | 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.", | |
562 | "--consumerd32-path"); | |
563 | } else { | |
e6142f2e JG |
564 | config_string_set(&config.consumerd32_bin_path, |
565 | strdup(arg)); | |
566 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
567 | PERROR("strdup"); |
568 | ret = -ENOMEM; | |
569 | } | |
db322c4d | 570 | } |
c0232ea5 | 571 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
572 | if (!arg || *arg == '\0') { |
573 | ret = -EINVAL; | |
574 | goto end; | |
575 | } | |
e8fa9fb0 MD |
576 | if (lttng_is_setuid_setgid()) { |
577 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
578 | "--consumerd32-libdir"); | |
579 | } else { | |
e6142f2e JG |
580 | config_string_set(&config.consumerd32_lib_dir, |
581 | strdup(arg)); | |
582 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
583 | PERROR("strdup"); |
584 | ret = -ENOMEM; | |
585 | } | |
db322c4d | 586 | } |
c0232ea5 | 587 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
588 | if (!arg || *arg == '\0') { |
589 | ret = -EINVAL; | |
590 | goto end; | |
591 | } | |
e8fa9fb0 MD |
592 | if (lttng_is_setuid_setgid()) { |
593 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
594 | "--consumerd64-path"); | |
595 | } else { | |
e6142f2e JG |
596 | config_string_set(&config.consumerd64_bin_path, |
597 | strdup(arg)); | |
598 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
599 | PERROR("strdup"); |
600 | ret = -ENOMEM; | |
601 | } | |
db322c4d | 602 | } |
c0232ea5 | 603 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
604 | if (!arg || *arg == '\0') { |
605 | ret = -EINVAL; | |
606 | goto end; | |
607 | } | |
e8fa9fb0 MD |
608 | if (lttng_is_setuid_setgid()) { |
609 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
610 | "--consumerd64-libdir"); | |
611 | } else { | |
e6142f2e JG |
612 | config_string_set(&config.consumerd64_lib_dir, |
613 | strdup(arg)); | |
614 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
615 | PERROR("strdup"); |
616 | ret = -ENOMEM; | |
617 | } | |
db322c4d | 618 | } |
c0232ea5 | 619 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
620 | if (!arg || *arg == '\0') { |
621 | ret = -EINVAL; | |
622 | goto end; | |
623 | } | |
e8fa9fb0 MD |
624 | if (lttng_is_setuid_setgid()) { |
625 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
626 | "-p, --pidfile"); | |
627 | } else { | |
e6142f2e JG |
628 | config_string_set(&config.pid_file_path, strdup(arg)); |
629 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
630 | PERROR("strdup"); |
631 | ret = -ENOMEM; | |
632 | } | |
db322c4d | 633 | } |
c0232ea5 | 634 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
635 | if (!arg || *arg == '\0') { |
636 | ret = -EINVAL; | |
637 | goto end; | |
638 | } | |
e8fa9fb0 MD |
639 | if (lttng_is_setuid_setgid()) { |
640 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
641 | "--agent-tcp-port"); | |
642 | } else { | |
643 | unsigned long v; | |
4d076222 | 644 | |
e8fa9fb0 MD |
645 | errno = 0; |
646 | v = strtoul(arg, NULL, 0); | |
647 | if (errno != 0 || !isdigit(arg[0])) { | |
648 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
649 | return -1; | |
650 | } | |
651 | if (v == 0 || v >= 65535) { | |
652 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
653 | return -1; | |
654 | } | |
2288467f JG |
655 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
656 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 657 | } |
c0232ea5 | 658 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
659 | if (!arg || *arg == '\0') { |
660 | ret = -EINVAL; | |
661 | goto end; | |
662 | } | |
e8fa9fb0 MD |
663 | if (lttng_is_setuid_setgid()) { |
664 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
665 | "-l, --load"); | |
666 | } else { | |
3cfcd698 | 667 | config_string_set(&config.load_session_path, strdup(arg)); |
e6142f2e | 668 | if (!config.load_session_path.value) { |
e8fa9fb0 MD |
669 | PERROR("strdup"); |
670 | ret = -ENOMEM; | |
671 | } | |
ef367a93 | 672 | } |
c0232ea5 | 673 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
674 | if (!arg || *arg == '\0') { |
675 | ret = -EINVAL; | |
676 | goto end; | |
677 | } | |
e8fa9fb0 MD |
678 | if (lttng_is_setuid_setgid()) { |
679 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
680 | "--kmod-probes"); | |
681 | } else { | |
e6142f2e JG |
682 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
683 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
684 | PERROR("strdup"); |
685 | ret = -ENOMEM; | |
686 | } | |
c9d42407 | 687 | } |
c0232ea5 | 688 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
689 | if (!arg || *arg == '\0') { |
690 | ret = -EINVAL; | |
691 | goto end; | |
692 | } | |
e8fa9fb0 MD |
693 | if (lttng_is_setuid_setgid()) { |
694 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
695 | "--extra-kmod-probes"); | |
696 | } else { | |
e6142f2e JG |
697 | config_string_set(&config.kmod_extra_probes_list, |
698 | strdup(arg)); | |
699 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
700 | PERROR("strdup"); |
701 | ret = -ENOMEM; | |
702 | } | |
db322c4d | 703 | } |
90aa04a1 FD |
704 | } else if (string_match(optname, "event-notifier-error-number-of-bucket")) { |
705 | unsigned long v; | |
706 | ||
707 | errno = 0; | |
708 | v = strtoul(arg, NULL, 0); | |
709 | if (errno != 0 || !isdigit(arg[0])) { | |
710 | ERR("Wrong value in --event-notifier-error-number-of-bucket parameter: %s", arg); | |
711 | return -1; | |
712 | } | |
713 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
714 | ERR("Value out of range for --event-notifier-error-number-of-bucket parameter: %s", arg); | |
715 | return -1; | |
716 | } | |
717 | config.event_notifier_error_counter_bucket = (int) v; | |
718 | DBG3("Number of event notifier error counter set to non default: %i", | |
719 | config.event_notifier_error_counter_bucket); | |
720 | goto end; | |
c0232ea5 JG |
721 | } else if (string_match(optname, "config") || opt == 'f') { |
722 | /* This is handled in set_options() thus silent skip. */ | |
723 | goto end; | |
724 | } else { | |
26296c48 JG |
725 | /* Unknown option or other error. |
726 | * Error is printed by getopt, just return */ | |
727 | ret = -1; | |
728 | } | |
729 | ||
f3dd7ce7 | 730 | end: |
c5d350b2 JG |
731 | if (ret == -EINVAL) { |
732 | const char *opt_name = "unknown"; | |
733 | int i; | |
734 | ||
735 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
736 | i++) { | |
737 | if (opt == long_options[i].val) { | |
738 | opt_name = long_options[i].name; | |
739 | break; | |
740 | } | |
741 | } | |
742 | ||
743 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
744 | opt_name); | |
745 | } | |
f3dd7ce7 | 746 | |
26296c48 JG |
747 | return ret; |
748 | } | |
749 | ||
750 | /* | |
751 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 752 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
753 | * return value conventions. |
754 | */ | |
755 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
756 | { | |
757 | int ret = 0, i; | |
758 | ||
759 | if (!entry || !entry->name || !entry->value) { | |
760 | ret = -EINVAL; | |
761 | goto end; | |
762 | } | |
763 | ||
764 | /* Check if the option is to be ignored */ | |
765 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
766 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
767 | goto end; | |
768 | } | |
769 | } | |
770 | ||
771 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
772 | i++) { | |
773 | ||
774 | /* Ignore if not fully matched. */ | |
775 | if (strcmp(entry->name, long_options[i].name)) { | |
776 | continue; | |
777 | } | |
778 | ||
779 | /* | |
780 | * If the option takes no argument on the command line, we have to | |
781 | * check if the value is "true". We support non-zero numeric values, | |
782 | * true, on and yes. | |
783 | */ | |
784 | if (!long_options[i].has_arg) { | |
785 | ret = config_parse_value(entry->value); | |
786 | if (ret <= 0) { | |
787 | if (ret) { | |
788 | WARN("Invalid configuration value \"%s\" for option %s", | |
789 | entry->value, entry->name); | |
790 | } | |
791 | /* False, skip boolean config option. */ | |
792 | goto end; | |
4d076222 | 793 | } |
26296c48 JG |
794 | } |
795 | ||
796 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
797 | goto end; | |
798 | } | |
799 | ||
800 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
801 | ||
802 | end: | |
803 | return ret; | |
804 | } | |
805 | ||
a3bc3918 JR |
806 | static void print_version(void) { |
807 | fprintf(stdout, "%s\n", VERSION); | |
808 | } | |
809 | ||
26296c48 JG |
810 | /* |
811 | * daemon configuration loading and argument parsing | |
812 | */ | |
813 | static int set_options(int argc, char **argv) | |
814 | { | |
815 | int ret = 0, c = 0, option_index = 0; | |
816 | int orig_optopt = optopt, orig_optind = optind; | |
817 | char *optstring; | |
818 | const char *config_path = NULL; | |
819 | ||
820 | optstring = utils_generate_optstring(long_options, | |
821 | sizeof(long_options) / sizeof(struct option)); | |
822 | if (!optstring) { | |
823 | ret = -ENOMEM; | |
824 | goto end; | |
825 | } | |
826 | ||
827 | /* Check for the --config option */ | |
828 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
829 | &option_index)) != -1) { | |
830 | if (c == '?') { | |
831 | ret = -EINVAL; | |
832 | goto end; | |
833 | } else if (c != 'f') { | |
834 | /* if not equal to --config option. */ | |
835 | continue; | |
836 | } | |
837 | ||
e8fa9fb0 MD |
838 | if (lttng_is_setuid_setgid()) { |
839 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
840 | "-f, --config"); | |
841 | } else { | |
842 | config_path = utils_expand_path(optarg); | |
843 | if (!config_path) { | |
844 | ERR("Failed to resolve path: %s", optarg); | |
845 | } | |
26296c48 JG |
846 | } |
847 | } | |
848 | ||
849 | ret = config_get_section_entries(config_path, config_section_name, | |
850 | config_entry_handler, NULL); | |
851 | if (ret) { | |
852 | if (ret > 0) { | |
853 | ERR("Invalid configuration option at line %i", ret); | |
854 | ret = -1; | |
855 | } | |
856 | goto end; | |
857 | } | |
858 | ||
859 | /* Reset getopt's global state */ | |
860 | optopt = orig_optopt; | |
861 | optind = orig_optind; | |
862 | while (1) { | |
c0232ea5 JG |
863 | option_index = -1; |
864 | /* | |
865 | * getopt_long() will not set option_index if it encounters a | |
866 | * short option. | |
867 | */ | |
868 | c = getopt_long(argc, argv, optstring, long_options, | |
869 | &option_index); | |
26296c48 | 870 | if (c == -1) { |
4d076222 DG |
871 | break; |
872 | } | |
26296c48 | 873 | |
c0232ea5 JG |
874 | /* |
875 | * Pass NULL as the long option name if popt left the index | |
876 | * unset. | |
877 | */ | |
878 | ret = set_option(c, optarg, | |
879 | option_index < 0 ? NULL : | |
880 | long_options[option_index].name); | |
26296c48 JG |
881 | if (ret < 0) { |
882 | break; | |
fac6795d DG |
883 | } |
884 | } | |
885 | ||
26296c48 JG |
886 | end: |
887 | free(optstring); | |
888 | return ret; | |
fac6795d DG |
889 | } |
890 | ||
f472090a JG |
891 | /* |
892 | * Create lockfile using the rundir and return its fd. | |
893 | */ | |
894 | static int create_lockfile(void) | |
895 | { | |
3cfcd698 | 896 | return utils_create_lock_file(config.lock_file_path.value); |
f472090a JG |
897 | } |
898 | ||
fac6795d | 899 | /* |
54d01ffb DG |
900 | * Check if the global socket is available, and if a daemon is answering at the |
901 | * other side. If yes, error is returned. | |
f472090a JG |
902 | * |
903 | * Also attempts to create and hold the lock file. | |
fac6795d | 904 | */ |
cf3af59e | 905 | static int check_existing_daemon(void) |
fac6795d | 906 | { |
f472090a JG |
907 | int ret = 0; |
908 | ||
7d8234d9 | 909 | /* Is there anybody out there ? */ |
099e26bd | 910 | if (lttng_session_daemon_alive()) { |
f472090a JG |
911 | ret = -EEXIST; |
912 | goto end; | |
099e26bd | 913 | } |
b09c7c76 | 914 | |
f472090a JG |
915 | lockfile_fd = create_lockfile(); |
916 | if (lockfile_fd < 0) { | |
917 | ret = -EEXIST; | |
918 | goto end; | |
919 | } | |
920 | end: | |
921 | return ret; | |
922 | } | |
923 | ||
924 | static void sessiond_cleanup_lock_file(void) | |
925 | { | |
926 | int ret; | |
927 | ||
928 | /* | |
929 | * Cleanup lock file by deleting it and finaly closing it which will | |
930 | * release the file system lock. | |
931 | */ | |
932 | if (lockfile_fd >= 0) { | |
933 | ret = remove(config.lock_file_path.value); | |
934 | if (ret < 0) { | |
935 | PERROR("remove lock file"); | |
936 | } | |
937 | ret = close(lockfile_fd); | |
938 | if (ret < 0) { | |
939 | PERROR("close lock file"); | |
940 | } | |
941 | } | |
fac6795d DG |
942 | } |
943 | ||
fac6795d | 944 | /* |
d063d709 | 945 | * Set the tracing group gid onto the client socket. |
5e16da05 | 946 | * |
d063d709 | 947 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 948 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 949 | */ |
be040666 | 950 | static int set_permissions(char *rundir) |
fac6795d DG |
951 | { |
952 | int ret; | |
996b65c8 | 953 | gid_t gid; |
fac6795d | 954 | |
28ab59d0 JR |
955 | ret = utils_get_group_id(config.tracing_group_name.value, true, &gid); |
956 | if (ret) { | |
957 | /* Default to root group. */ | |
958 | gid = 0; | |
959 | } | |
fac6795d | 960 | |
d6f42150 | 961 | /* Set lttng run dir */ |
be040666 | 962 | ret = chown(rundir, 0, gid); |
d6f42150 | 963 | if (ret < 0) { |
be040666 | 964 | ERR("Unable to set group on %s", rundir); |
76d7553f | 965 | PERROR("chown"); |
d6f42150 DG |
966 | } |
967 | ||
6c71277b MD |
968 | /* |
969 | * Ensure all applications and tracing group can search the run | |
970 | * dir. Allow everyone to read the directory, since it does not | |
971 | * buy us anything to hide its content. | |
972 | */ | |
973 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
974 | if (ret < 0) { |
975 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 976 | PERROR("chmod"); |
d1613cf5 JN |
977 | } |
978 | ||
d6f42150 | 979 | /* lttng client socket path */ |
e6142f2e | 980 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 981 | if (ret < 0) { |
e6142f2e | 982 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 983 | PERROR("chown"); |
d6f42150 DG |
984 | } |
985 | ||
3bd1e081 | 986 | /* kconsumer error socket path */ |
6c71277b | 987 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 988 | if (ret < 0) { |
3bd1e081 | 989 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 990 | PERROR("chown"); |
3bd1e081 MD |
991 | } |
992 | ||
7753dea8 | 993 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 994 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
995 | if (ret < 0) { |
996 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 997 | PERROR("chown"); |
7753dea8 MD |
998 | } |
999 | ||
1000 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 1001 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1002 | if (ret < 0) { |
7753dea8 | 1003 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 1004 | PERROR("chown"); |
fac6795d DG |
1005 | } |
1006 | ||
d6f42150 | 1007 | DBG("All permissions are set"); |
e07ae692 | 1008 | |
fac6795d DG |
1009 | return ret; |
1010 | } | |
1011 | ||
d6f42150 | 1012 | /* |
d063d709 | 1013 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1014 | */ |
e6142f2e | 1015 | static int create_lttng_rundir(void) |
d6f42150 DG |
1016 | { |
1017 | int ret; | |
1018 | ||
e6142f2e | 1019 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 1020 | |
e6142f2e | 1021 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 1022 | if (ret < 0) { |
b1f11e69 | 1023 | if (errno != EEXIST) { |
e6142f2e | 1024 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
1025 | goto error; |
1026 | } else { | |
1027 | ret = 0; | |
1028 | } | |
d6f42150 DG |
1029 | } |
1030 | ||
1031 | error: | |
1032 | return ret; | |
1033 | } | |
1034 | ||
1035 | /* | |
e6142f2e | 1036 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1037 | * session daemon. |
d6f42150 | 1038 | */ |
e6142f2e | 1039 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1040 | { |
1041 | int ret; | |
e6142f2e | 1042 | char *path = NULL; |
d6f42150 | 1043 | |
6c71277b | 1044 | switch (consumer_data->type) { |
7753dea8 | 1045 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 1046 | path = config.kconsumerd_path.value; |
7753dea8 MD |
1047 | break; |
1048 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 1049 | path = config.consumerd64_path.value; |
7753dea8 MD |
1050 | break; |
1051 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 1052 | path = config.consumerd32_path.value; |
7753dea8 MD |
1053 | break; |
1054 | default: | |
1055 | ERR("Consumer type unknown"); | |
1056 | ret = -EINVAL; | |
1057 | goto error; | |
d6f42150 | 1058 | } |
e6142f2e | 1059 | assert(path); |
d6f42150 | 1060 | |
67e40797 DG |
1061 | DBG2("Creating consumer directory: %s", path); |
1062 | ||
6c71277b | 1063 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1064 | if (ret < 0 && errno != EEXIST) { |
1065 | PERROR("mkdir"); | |
1066 | ERR("Failed to create %s", path); | |
1067 | goto error; | |
d6f42150 | 1068 | } |
6c71277b | 1069 | if (is_root) { |
28ab59d0 JR |
1070 | gid_t gid; |
1071 | ||
1072 | ret = utils_get_group_id(config.tracing_group_name.value, true, | |
1073 | &gid); | |
1074 | if (ret) { | |
1075 | /* Default to root group. */ | |
1076 | gid = 0; | |
1077 | } | |
1078 | ||
1079 | ret = chown(path, 0, gid); | |
6c71277b MD |
1080 | if (ret < 0) { |
1081 | ERR("Unable to set group on %s", path); | |
1082 | PERROR("chown"); | |
1083 | goto error; | |
1084 | } | |
1085 | } | |
d6f42150 | 1086 | |
e6142f2e | 1087 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1088 | consumer_data->err_sock = |
1089 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1090 | if (consumer_data->err_sock < 0) { | |
1091 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1092 | ret = -1; |
1093 | goto error; | |
1094 | } | |
1095 | ||
a24f05ab MD |
1096 | /* |
1097 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1098 | * show must go on. | |
1099 | */ | |
1100 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1101 | if (ret < 0) { | |
1102 | PERROR("utils_set_fd_cloexec"); | |
1103 | /* continue anyway */ | |
1104 | } | |
1105 | ||
d6f42150 | 1106 | /* File permission MUST be 660 */ |
3bd1e081 | 1107 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 1108 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1109 | if (ret < 0) { |
3bd1e081 | 1110 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1111 | PERROR("chmod"); |
d6f42150 DG |
1112 | goto error; |
1113 | } | |
1114 | ||
1115 | error: | |
1116 | return ret; | |
1117 | } | |
1118 | ||
fac6795d | 1119 | /* |
d063d709 | 1120 | * Signal handler for the daemon |
cf3af59e | 1121 | * |
54d01ffb DG |
1122 | * Simply stop all worker threads, leaving main() return gracefully after |
1123 | * joining all threads and calling cleanup(). | |
fac6795d DG |
1124 | */ |
1125 | static void sighandler(int sig) | |
1126 | { | |
1127 | switch (sig) { | |
cf3af59e | 1128 | case SIGINT: |
af87c45a | 1129 | DBG("SIGINT caught"); |
cf3af59e MD |
1130 | stop_threads(); |
1131 | break; | |
1132 | case SIGTERM: | |
af87c45a | 1133 | DBG("SIGTERM caught"); |
cf3af59e MD |
1134 | stop_threads(); |
1135 | break; | |
0bb7724a DG |
1136 | case SIGUSR1: |
1137 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1138 | break; | |
cf3af59e MD |
1139 | default: |
1140 | break; | |
fac6795d | 1141 | } |
fac6795d DG |
1142 | } |
1143 | ||
1144 | /* | |
d063d709 | 1145 | * Setup signal handler for : |
1d4b027a | 1146 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1147 | */ |
1d4b027a | 1148 | static int set_signal_handler(void) |
fac6795d | 1149 | { |
1d4b027a DG |
1150 | int ret = 0; |
1151 | struct sigaction sa; | |
1152 | sigset_t sigset; | |
fac6795d | 1153 | |
1d4b027a | 1154 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1155 | PERROR("sigemptyset"); |
1d4b027a DG |
1156 | return ret; |
1157 | } | |
d6f42150 | 1158 | |
1d4b027a DG |
1159 | sa.sa_mask = sigset; |
1160 | sa.sa_flags = 0; | |
0072e5e2 MD |
1161 | |
1162 | sa.sa_handler = sighandler; | |
1d4b027a | 1163 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 1164 | PERROR("sigaction"); |
1d4b027a | 1165 | return ret; |
d6f42150 DG |
1166 | } |
1167 | ||
1d4b027a | 1168 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 1169 | PERROR("sigaction"); |
1d4b027a | 1170 | return ret; |
d6f42150 | 1171 | } |
aaf26714 | 1172 | |
0072e5e2 | 1173 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 1174 | PERROR("sigaction"); |
1d4b027a | 1175 | return ret; |
8c0faa1d DG |
1176 | } |
1177 | ||
0072e5e2 MD |
1178 | sa.sa_handler = SIG_IGN; |
1179 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
1180 | PERROR("sigaction"); |
1181 | return ret; | |
1182 | } | |
1183 | ||
1184 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
1185 | |
1186 | return ret; | |
fac6795d DG |
1187 | } |
1188 | ||
f3ed775e | 1189 | /* |
d063d709 | 1190 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1191 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
1192 | */ |
1193 | static void set_ulimit(void) | |
1194 | { | |
1195 | int ret; | |
1196 | struct rlimit lim; | |
1197 | ||
514bb9f0 | 1198 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1199 | lim.rlim_cur = 65535; |
1200 | lim.rlim_max = 65535; | |
1201 | ||
1202 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1203 | if (ret < 0) { | |
76d7553f | 1204 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1205 | } |
1206 | } | |
1207 | ||
4a15001e | 1208 | static int write_pidfile(void) |
35f90c40 | 1209 | { |
3cfcd698 | 1210 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
1211 | } |
1212 | ||
e6142f2e JG |
1213 | static int set_clock_plugin_env(void) |
1214 | { | |
1215 | int ret = 0; | |
1216 | char *env_value = NULL; | |
cd9290dd | 1217 | |
e6142f2e JG |
1218 | if (!config.lttng_ust_clock_plugin.value) { |
1219 | goto end; | |
1220 | } | |
1221 | ||
3cfcd698 | 1222 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", |
e6142f2e | 1223 | config.lttng_ust_clock_plugin.value); |
cd9290dd | 1224 | if (ret < 0) { |
e6142f2e JG |
1225 | PERROR("asprintf"); |
1226 | goto end; | |
cd9290dd DG |
1227 | } |
1228 | ||
e6142f2e JG |
1229 | ret = putenv(env_value); |
1230 | if (ret) { | |
1231 | free(env_value); | |
1232 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1233 | goto end; | |
1234 | } | |
cd9290dd | 1235 | |
e6142f2e JG |
1236 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
1237 | config.lttng_ust_clock_plugin.value); | |
1238 | end: | |
4a15001e | 1239 | return ret; |
ef367a93 JG |
1240 | } |
1241 | ||
99d688f2 JG |
1242 | static void destroy_all_sessions_and_wait(void) |
1243 | { | |
1244 | struct ltt_session *session, *tmp; | |
1245 | struct ltt_session_list *session_list; | |
1246 | ||
1247 | session_list = session_get_list(); | |
1248 | DBG("Initiating destruction of all sessions"); | |
1249 | ||
1250 | if (!session_list) { | |
1251 | return; | |
1252 | } | |
1253 | ||
99d688f2 JG |
1254 | session_lock_list(); |
1255 | /* Initiate the destruction of all sessions. */ | |
1256 | cds_list_for_each_entry_safe(session, tmp, | |
1257 | &session_list->head, list) { | |
1258 | if (!session_get(session)) { | |
1259 | continue; | |
1260 | } | |
1261 | ||
1262 | session_lock(session); | |
1263 | if (session->destroyed) { | |
1264 | goto unlock_session; | |
1265 | } | |
63763958 | 1266 | (void) cmd_stop_trace(session); |
3e3665b8 JG |
1267 | (void) cmd_destroy_session(session, notification_thread_handle, |
1268 | NULL); | |
99d688f2 JG |
1269 | unlock_session: |
1270 | session_unlock(session); | |
1271 | session_put(session); | |
1272 | } | |
1273 | session_unlock_list(); | |
1274 | ||
1275 | /* Wait for the destruction of all sessions to complete. */ | |
1276 | DBG("Waiting for the destruction of all sessions to complete"); | |
1277 | session_list_wait_empty(); | |
1278 | DBG("Destruction of all sessions completed"); | |
1279 | } | |
1280 | ||
b69a1b40 JG |
1281 | static void unregister_all_triggers(void) |
1282 | { | |
1283 | enum lttng_error_code ret_code; | |
1284 | enum lttng_trigger_status trigger_status; | |
1285 | struct lttng_triggers *triggers = NULL; | |
1286 | unsigned int trigger_count, i; | |
1287 | const struct lttng_credentials creds = { | |
1288 | .uid = LTTNG_OPTIONAL_INIT_VALUE(0), | |
1289 | }; | |
1290 | ||
1291 | DBG("Unregistering all triggers"); | |
1292 | ||
1293 | /* | |
1294 | * List all triggers as "root" since we wish to unregister all triggers. | |
1295 | */ | |
1296 | ret_code = notification_thread_command_list_triggers( | |
1297 | notification_thread_handle, creds.uid.value, &triggers); | |
1298 | if (ret_code != LTTNG_OK) { | |
1299 | ERR("Failed to list triggers while unregistering all triggers"); | |
1300 | goto end; | |
1301 | } | |
1302 | ||
1303 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
1304 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1305 | ||
1306 | for (i = 0; i < trigger_count; i++) { | |
1307 | enum lttng_error_code ret_code; | |
1308 | uid_t trigger_owner; | |
1309 | const char *trigger_name; | |
1310 | const struct lttng_trigger *trigger = | |
1311 | lttng_triggers_get_at_index(triggers, i); | |
1312 | ||
1313 | assert(trigger); | |
1314 | ||
1315 | trigger_status = lttng_trigger_get_owner_uid( | |
1316 | trigger, &trigger_owner); | |
1317 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1318 | ||
1319 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
1320 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1321 | ||
1322 | DBG("Unregistering trigger: trigger owner uid = %d, trigger name = '%s'", | |
1323 | (int) trigger_owner, trigger_name); | |
1324 | ||
1325 | ret_code = cmd_unregister_trigger( | |
1326 | &creds, trigger, notification_thread_handle); | |
1327 | if (ret_code != LTTNG_OK) { | |
1328 | ERR("Failed to unregister trigger: trigger owner uid = %d, trigger name = '%s', error: '%s'", | |
1329 | (int) trigger_owner, trigger_name, | |
1330 | lttng_strerror(-ret_code)); | |
1331 | /* Continue to unregister the remaining triggers. */ | |
1332 | } | |
1333 | } | |
1334 | end: | |
1335 | lttng_triggers_destroy(triggers); | |
1336 | } | |
1337 | ||
929f71ec JG |
1338 | static int run_as_worker_post_fork_cleanup(void *data) |
1339 | { | |
1340 | struct sessiond_config *sessiond_config = data; | |
1341 | ||
1342 | sessiond_config_fini(sessiond_config); | |
1343 | return 0; | |
1344 | } | |
1345 | ||
1346 | static int launch_run_as_worker(const char *procname) | |
1347 | { | |
1348 | /* | |
1349 | * Clean-up before forking the run-as worker. Any dynamically | |
1350 | * allocated memory of which the worker is not aware will | |
1351 | * be leaked as the process forks a run-as worker (and performs | |
1352 | * no exec*()). The same would apply to any opened fd. | |
1353 | */ | |
1354 | return run_as_create_worker(procname, run_as_worker_post_fork_cleanup, | |
1355 | &config); | |
1356 | } | |
1357 | ||
52a0e931 JG |
1358 | static void sessiond_uuid_log(void) |
1359 | { | |
c70636a7 | 1360 | char uuid_str[LTTNG_UUID_STR_LEN]; |
52a0e931 JG |
1361 | |
1362 | lttng_uuid_to_str(sessiond_uuid, uuid_str); | |
1363 | DBG("Starting lttng-sessiond {%s}", uuid_str); | |
1364 | } | |
1365 | ||
fac6795d DG |
1366 | /* |
1367 | * main | |
1368 | */ | |
1369 | int main(int argc, char **argv) | |
1370 | { | |
4a15001e | 1371 | int ret = 0, retval = 0; |
e6142f2e | 1372 | const char *env_app_timeout; |
b3530820 JG |
1373 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
1374 | *ust64_channel_monitor_pipe = NULL, | |
1375 | *kernel_channel_monitor_pipe = NULL; | |
a3707772 | 1376 | struct lttng_thread *ht_cleanup_thread = NULL; |
bc26e826 | 1377 | struct timer_thread_parameters timer_thread_parameters; |
64d9b072 JG |
1378 | /* Rotation thread handle. */ |
1379 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
1380 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
1381 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
917a718d | 1382 | struct lttng_thread *client_thread = NULL; |
4a91420c | 1383 | struct lttng_thread *notification_thread = NULL; |
bd9addf7 | 1384 | struct lttng_thread *register_apps_thread = NULL; |
fac6795d | 1385 | |
f5fb86c1 | 1386 | logger_set_thread_name("Main", false); |
335a95b7 MD |
1387 | init_kernel_workarounds(); |
1388 | ||
f6a9efaa DG |
1389 | rcu_register_thread(); |
1390 | ||
4a15001e MD |
1391 | if (set_signal_handler()) { |
1392 | retval = -1; | |
1393 | goto exit_set_signal_handler; | |
0bb7724a DG |
1394 | } |
1395 | ||
92816cc3 | 1396 | if (timer_signal_init()) { |
d086f507 JD |
1397 | retval = -1; |
1398 | goto exit_set_signal_handler; | |
1399 | } | |
1400 | ||
12744796 DG |
1401 | page_size = sysconf(_SC_PAGESIZE); |
1402 | if (page_size < 0) { | |
1403 | PERROR("sysconf _SC_PAGESIZE"); | |
1404 | page_size = LONG_MAX; | |
1405 | WARN("Fallback page size to %ld", page_size); | |
1406 | } | |
1407 | ||
e6142f2e JG |
1408 | ret = sessiond_config_init(&config); |
1409 | if (ret) { | |
1410 | retval = -1; | |
1411 | goto exit_set_signal_handler; | |
1412 | } | |
1413 | ||
2788b494 JR |
1414 | /* |
1415 | * Init config from environment variables. | |
1416 | * Command line option override env configuration per-doc. Do env first. | |
1417 | */ | |
1418 | sessiond_config_apply_env_config(&config); | |
1419 | ||
4a15001e MD |
1420 | /* |
1421 | * Parse arguments and load the daemon configuration file. | |
1422 | * | |
1423 | * We have an exit_options exit path to free memory reserved by | |
1424 | * set_options. This is needed because the rest of sessiond_cleanup() | |
1425 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
1426 | * depends on set_options. | |
1427 | */ | |
fac6795d | 1428 | progname = argv[0]; |
4a15001e MD |
1429 | if (set_options(argc, argv)) { |
1430 | retval = -1; | |
1431 | goto exit_options; | |
fac6795d DG |
1432 | } |
1433 | ||
e6142f2e JG |
1434 | /* |
1435 | * Resolve all paths received as arguments, configuration option, or | |
1436 | * through environment variable as absolute paths. This is necessary | |
1437 | * since daemonizing causes the sessiond's current working directory | |
1438 | * to '/'. | |
1439 | */ | |
1440 | ret = sessiond_config_resolve_paths(&config); | |
1441 | if (ret) { | |
1442 | goto exit_options; | |
1443 | } | |
1444 | ||
1445 | /* Apply config. */ | |
1446 | lttng_opt_verbose = config.verbose; | |
1447 | lttng_opt_quiet = config.quiet; | |
1448 | kconsumer_data.err_unix_sock_path = | |
1449 | config.kconsumerd_err_unix_sock_path.value; | |
1450 | kconsumer_data.cmd_unix_sock_path = | |
1451 | config.kconsumerd_cmd_unix_sock_path.value; | |
1452 | ustconsumer32_data.err_unix_sock_path = | |
1453 | config.consumerd32_err_unix_sock_path.value; | |
1454 | ustconsumer32_data.cmd_unix_sock_path = | |
1455 | config.consumerd32_cmd_unix_sock_path.value; | |
1456 | ustconsumer64_data.err_unix_sock_path = | |
1457 | config.consumerd64_err_unix_sock_path.value; | |
1458 | ustconsumer64_data.cmd_unix_sock_path = | |
1459 | config.consumerd64_cmd_unix_sock_path.value; | |
1460 | set_clock_plugin_env(); | |
1461 | ||
1462 | sessiond_config_log(&config); | |
52a0e931 | 1463 | sessiond_uuid_log(); |
e6142f2e | 1464 | |
a3bc3918 JR |
1465 | if (opt_print_version) { |
1466 | print_version(); | |
1467 | retval = 0; | |
1468 | goto exit_options; | |
1469 | } | |
1470 | ||
f472090a JG |
1471 | if (create_lttng_rundir()) { |
1472 | retval = -1; | |
1473 | goto exit_options; | |
1474 | } | |
1475 | ||
1476 | /* Abort launch if a session daemon is already running. */ | |
1477 | if (check_existing_daemon()) { | |
1478 | ERR("A session daemon is already running."); | |
1479 | retval = -1; | |
1480 | goto exit_options; | |
1481 | } | |
1482 | ||
fac6795d | 1483 | /* Daemonize */ |
e6142f2e | 1484 | if (config.daemonize || config.background) { |
ceed52b5 MD |
1485 | int i; |
1486 | ||
72dd7491 | 1487 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 1488 | !config.background); |
53094c05 | 1489 | if (ret < 0) { |
4a15001e MD |
1490 | retval = -1; |
1491 | goto exit_options; | |
53094c05 | 1492 | } |
0bb7724a | 1493 | |
ceed52b5 | 1494 | /* |
0bb7724a | 1495 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 1496 | * closed, in case we are called with more opened file |
f472090a | 1497 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
1498 | */ |
1499 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
1500 | if (i == lockfile_fd) { |
1501 | continue; | |
1502 | } | |
ceed52b5 MD |
1503 | (void) close(i); |
1504 | } | |
1505 | } | |
1506 | ||
929f71ec | 1507 | if (launch_run_as_worker(argv[0]) < 0) { |
7567352f MD |
1508 | goto exit_create_run_as_worker_cleanup; |
1509 | } | |
1510 | ||
4a15001e MD |
1511 | /* |
1512 | * Starting from here, we can create threads. This needs to be after | |
1513 | * lttng_daemonize due to RCU. | |
1514 | */ | |
1515 | ||
1516 | /* | |
1517 | * Initialize the health check subsystem. This call should set the | |
1518 | * appropriate time values. | |
1519 | */ | |
1520 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
1521 | if (!health_sessiond) { | |
1522 | PERROR("health_app_create error"); | |
1523 | retval = -1; | |
0d64e8fb | 1524 | goto stop_threads; |
4a15001e MD |
1525 | } |
1526 | ||
4a15001e | 1527 | /* Create thread to clean up RCU hash tables */ |
a3707772 JG |
1528 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
1529 | if (!ht_cleanup_thread) { | |
4a15001e | 1530 | retval = -1; |
0d64e8fb | 1531 | goto stop_threads; |
4a15001e MD |
1532 | } |
1533 | ||
ceed52b5 | 1534 | /* Create thread quit pipe */ |
a7333da7 | 1535 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e | 1536 | retval = -1; |
0d64e8fb | 1537 | goto stop_threads; |
fac6795d DG |
1538 | } |
1539 | ||
1540 | /* Check if daemon is UID = 0 */ | |
1541 | is_root = !getuid(); | |
fac6795d | 1542 | if (is_root) { |
67e40797 | 1543 | /* Create global run dir with root access */ |
67e40797 | 1544 | |
b3530820 JG |
1545 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
1546 | if (!kernel_channel_monitor_pipe) { | |
1547 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
1548 | retval = -1; | |
0d64e8fb | 1549 | goto stop_threads; |
b3530820 JG |
1550 | } |
1551 | kconsumer_data.channel_monitor_pipe = | |
1552 | lttng_pipe_release_writefd( | |
1553 | kernel_channel_monitor_pipe); | |
1554 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
1555 | retval = -1; | |
0d64e8fb | 1556 | goto stop_threads; |
b3530820 | 1557 | } |
fac6795d DG |
1558 | } |
1559 | ||
5c827ce0 DG |
1560 | /* Set consumer initial state */ |
1561 | kernel_consumerd_state = CONSUMER_STOPPED; | |
1562 | ust_consumerd_state = CONSUMER_STOPPED; | |
1563 | ||
b3530820 JG |
1564 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
1565 | if (!ust32_channel_monitor_pipe) { | |
1566 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
1567 | retval = -1; | |
0d64e8fb | 1568 | goto stop_threads; |
b3530820 JG |
1569 | } |
1570 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1571 | ust32_channel_monitor_pipe); | |
1572 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
1573 | retval = -1; | |
0d64e8fb | 1574 | goto stop_threads; |
b3530820 | 1575 | } |
62c43103 | 1576 | |
d086f507 | 1577 | /* |
92816cc3 JG |
1578 | * The rotation_thread_timer_queue structure is shared between the |
1579 | * sessiond timer thread and the rotation thread. The main thread keeps | |
1580 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 1581 | */ |
92816cc3 | 1582 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
1583 | if (!rotation_timer_queue) { |
1584 | retval = -1; | |
0d64e8fb | 1585 | goto stop_threads; |
d086f507 | 1586 | } |
bc26e826 JG |
1587 | timer_thread_parameters.rotation_thread_job_queue = |
1588 | rotation_timer_queue; | |
67e40797 | 1589 | |
b3530820 JG |
1590 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
1591 | if (!ust64_channel_monitor_pipe) { | |
1592 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
1593 | retval = -1; | |
0d64e8fb | 1594 | goto stop_threads; |
b3530820 JG |
1595 | } |
1596 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1597 | ust64_channel_monitor_pipe); | |
1598 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
1599 | retval = -1; | |
0d64e8fb | 1600 | goto stop_threads; |
b3530820 | 1601 | } |
847177cd | 1602 | |
1427f9b2 DG |
1603 | /* |
1604 | * Init UST app hash table. Alloc hash table before this point since | |
1605 | * cleanup() can get called after that point. | |
1606 | */ | |
4a15001e | 1607 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 1608 | ERR("Failed to allocate UST app hash table"); |
4a15001e | 1609 | retval = -1; |
0d64e8fb | 1610 | goto stop_threads; |
4a15001e | 1611 | } |
1427f9b2 | 1612 | |
90aa04a1 FD |
1613 | event_notifier_error_accounting_init(config.event_notifier_error_counter_bucket); |
1614 | ||
6a4e4039 JG |
1615 | /* |
1616 | * Initialize agent app hash table. We allocate the hash table here | |
1617 | * since cleanup() can get called after this point. | |
1618 | */ | |
1619 | if (agent_app_ht_alloc()) { | |
1620 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e | 1621 | retval = -1; |
0d64e8fb | 1622 | goto stop_threads; |
f20baf8e DG |
1623 | } |
1624 | ||
44760c20 JR |
1625 | if (agent_by_event_notifier_domain_ht_create()) { |
1626 | ERR("Failed to allocate per-event notifier domain agent hash table"); | |
1627 | retval = -1; | |
1628 | goto stop_threads; | |
1629 | } | |
a88df331 DG |
1630 | /* |
1631 | * These actions must be executed as root. We do that *after* setting up | |
1632 | * the sockets path because we MUST make the check for another daemon using | |
1633 | * those paths *before* trying to set the kernel consumer sockets and init | |
1634 | * kernel tracer. | |
1635 | */ | |
1636 | if (is_root) { | |
e6142f2e | 1637 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e | 1638 | retval = -1; |
0d64e8fb | 1639 | goto stop_threads; |
7753dea8 MD |
1640 | } |
1641 | ||
a88df331 | 1642 | /* Setup kernel tracer */ |
e6142f2e | 1643 | if (!config.no_kernel) { |
4fba7219 DG |
1644 | init_kernel_tracer(); |
1645 | } | |
a88df331 DG |
1646 | |
1647 | /* Set ulimit for open files */ | |
1648 | set_ulimit(); | |
fac6795d | 1649 | } |
4063050c MD |
1650 | /* init lttng_fd tracking must be done after set_ulimit. */ |
1651 | lttng_fd_init(); | |
fac6795d | 1652 | |
e6142f2e | 1653 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e | 1654 | retval = -1; |
0d64e8fb | 1655 | goto stop_threads; |
67e40797 DG |
1656 | } |
1657 | ||
e6142f2e | 1658 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e | 1659 | retval = -1; |
0d64e8fb | 1660 | goto stop_threads; |
67e40797 DG |
1661 | } |
1662 | ||
5b8719f5 | 1663 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 1664 | if (config.sig_parent) { |
5b8719f5 DG |
1665 | ppid = getppid(); |
1666 | } | |
1667 | ||
7a485870 | 1668 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 1669 | if (is_root && !config.no_kernel) { |
4a15001e MD |
1670 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
1671 | retval = -1; | |
0d64e8fb | 1672 | goto stop_threads; |
6620da75 | 1673 | } |
7a485870 DG |
1674 | } |
1675 | ||
099e26bd | 1676 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
1677 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
1678 | retval = -1; | |
0d64e8fb | 1679 | goto stop_threads; |
099e26bd DG |
1680 | } |
1681 | ||
d0b96690 | 1682 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
1683 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
1684 | retval = -1; | |
0d64e8fb | 1685 | goto stop_threads; |
d0b96690 DG |
1686 | } |
1687 | ||
7972aab2 DG |
1688 | /* Initialize global buffer per UID and PID registry. */ |
1689 | buffer_reg_init_uid_registry(); | |
1690 | buffer_reg_init_pid_registry(); | |
1691 | ||
099e26bd | 1692 | /* Init UST command queue. */ |
8bdee6e2 | 1693 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1694 | |
2f77fc4b | 1695 | cmd_init(); |
00e2e675 | 1696 | |
ae9e45b3 DG |
1697 | /* Check for the application socket timeout env variable. */ |
1698 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
1699 | if (env_app_timeout) { | |
e6142f2e | 1700 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 1701 | } else { |
e6142f2e | 1702 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
1703 | } |
1704 | ||
4a15001e MD |
1705 | ret = write_pidfile(); |
1706 | if (ret) { | |
1707 | ERR("Error in write_pidfile"); | |
1708 | retval = -1; | |
0d64e8fb | 1709 | goto stop_threads; |
4a15001e | 1710 | } |
35f90c40 | 1711 | |
554831e7 MD |
1712 | /* Initialize communication library */ |
1713 | lttcomm_init(); | |
4a15001e | 1714 | /* Initialize TCP timeout values */ |
d831c249 | 1715 | lttcomm_inet_init(); |
554831e7 | 1716 | |
12b4fb37 | 1717 | /* Create health-check thread. */ |
173fca4f | 1718 | if (!launch_health_management_thread()) { |
4a15001e | 1719 | retval = -1; |
0d64e8fb | 1720 | goto stop_threads; |
44a5e5eb DG |
1721 | } |
1722 | ||
b3530820 JG |
1723 | /* notification_thread_data acquires the pipes' read side. */ |
1724 | notification_thread_handle = notification_thread_handle_create( | |
1725 | ust32_channel_monitor_pipe, | |
1726 | ust64_channel_monitor_pipe, | |
c8a9de5a | 1727 | kernel_channel_monitor_pipe); |
b3530820 JG |
1728 | if (!notification_thread_handle) { |
1729 | retval = -1; | |
1730 | ERR("Failed to create notification thread shared data"); | |
0d64e8fb | 1731 | goto stop_threads; |
b3530820 JG |
1732 | } |
1733 | ||
1734 | /* Create notification thread. */ | |
4a91420c JG |
1735 | notification_thread = launch_notification_thread( |
1736 | notification_thread_handle); | |
1737 | if (!notification_thread) { | |
b3530820 | 1738 | retval = -1; |
0d64e8fb | 1739 | goto stop_threads; |
b3530820 JG |
1740 | } |
1741 | ||
d086f507 | 1742 | /* Create timer thread. */ |
bc26e826 | 1743 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 1744 | retval = -1; |
0d64e8fb | 1745 | goto stop_threads; |
d086f507 | 1746 | } |
d086f507 | 1747 | |
db66e574 JD |
1748 | /* rotation_thread_data acquires the pipes' read side. */ |
1749 | rotation_thread_handle = rotation_thread_handle_create( | |
90936dcf | 1750 | rotation_timer_queue, |
c8a9de5a | 1751 | notification_thread_handle); |
db66e574 JD |
1752 | if (!rotation_thread_handle) { |
1753 | retval = -1; | |
1754 | ERR("Failed to create rotation thread shared data"); | |
1755 | stop_threads(); | |
0d64e8fb | 1756 | goto stop_threads; |
db66e574 | 1757 | } |
db66e574 JD |
1758 | |
1759 | /* Create rotation thread. */ | |
64d9b072 | 1760 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 1761 | retval = -1; |
0d64e8fb | 1762 | goto stop_threads; |
db66e574 JD |
1763 | } |
1764 | ||
cf3af59e | 1765 | /* Create thread to manage the client socket */ |
917a718d JG |
1766 | client_thread = launch_client_thread(); |
1767 | if (!client_thread) { | |
4a15001e | 1768 | retval = -1; |
0d64e8fb | 1769 | goto stop_threads; |
cf3af59e | 1770 | } |
fac6795d | 1771 | |
308df7bb JG |
1772 | /* Set credentials of the client socket and rundir */ |
1773 | if (is_root && set_permissions(config.rundir.value)) { | |
1774 | retval = -1; | |
1775 | goto stop_threads; | |
1776 | } | |
1777 | ||
5d1b0219 JG |
1778 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], |
1779 | apps_cmd_notify_pipe[1])) { | |
4a15001e | 1780 | retval = -1; |
0d64e8fb | 1781 | goto stop_threads; |
099e26bd DG |
1782 | } |
1783 | ||
1784 | /* Create thread to manage application registration. */ | |
bd9addf7 JG |
1785 | register_apps_thread = launch_application_registration_thread( |
1786 | &ust_cmd_queue); | |
1787 | if (!register_apps_thread) { | |
4a15001e | 1788 | retval = -1; |
0d64e8fb | 1789 | goto stop_threads; |
099e26bd DG |
1790 | } |
1791 | ||
cf3af59e | 1792 | /* Create thread to manage application socket */ |
7649924e | 1793 | if (!launch_application_management_thread(apps_cmd_pipe[0])) { |
4a15001e | 1794 | retval = -1; |
0d64e8fb | 1795 | goto stop_threads; |
d0b96690 DG |
1796 | } |
1797 | ||
1798 | /* Create thread to manage application notify socket */ | |
971a61c6 | 1799 | if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) { |
4a15001e | 1800 | retval = -1; |
0d64e8fb | 1801 | goto stop_threads; |
cf3af59e | 1802 | } |
fac6795d | 1803 | |
8a7e4590 JG |
1804 | /* Create agent management thread. */ |
1805 | if (!launch_agent_management_thread()) { | |
4a15001e | 1806 | retval = -1; |
0d64e8fb | 1807 | goto stop_threads; |
4d076222 DG |
1808 | } |
1809 | ||
6620da75 | 1810 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 1811 | if (is_root && !config.no_kernel) { |
6620da75 | 1812 | /* Create kernel thread to manage kernel event */ |
5b093681 | 1813 | if (!launch_kernel_management_thread(kernel_poll_pipe[0])) { |
4a15001e | 1814 | retval = -1; |
0d64e8fb | 1815 | goto stop_threads; |
6620da75 | 1816 | } |
352b58f5 JR |
1817 | |
1818 | if (kernel_get_notification_fd() >= 0) { | |
1819 | ret = notification_thread_command_add_tracer_event_source( | |
1820 | notification_thread_handle, | |
1821 | kernel_get_notification_fd(), | |
1822 | LTTNG_DOMAIN_KERNEL); | |
1823 | if (ret != LTTNG_OK) { | |
1824 | ERR("Failed to add kernel trigger event source to notification thread"); | |
1825 | retval = -1; | |
1826 | goto stop_threads; | |
1827 | } | |
1828 | } | |
ef367a93 | 1829 | } |
7a485870 | 1830 | |
3316b9d6 JG |
1831 | /* Load sessions. */ |
1832 | ret = config_load_session(config.load_session_path.value, | |
1833 | NULL, 1, 1, NULL); | |
4a15001e | 1834 | if (ret) { |
3316b9d6 | 1835 | ERR("Session load failed: %s", error_get_str(ret)); |
4a15001e | 1836 | retval = -1; |
0d64e8fb | 1837 | goto stop_threads; |
4a15001e MD |
1838 | } |
1839 | ||
3316b9d6 JG |
1840 | /* Initialization completed. */ |
1841 | sessiond_signal_parents(); | |
1842 | ||
4a15001e MD |
1843 | /* |
1844 | * This is where we start awaiting program completion (e.g. through | |
1845 | * signal that asks threads to teardown). | |
1846 | */ | |
1847 | ||
99d688f2 | 1848 | /* Initiate teardown once activity occurs on the quit pipe. */ |
2d54bfb6 | 1849 | sessiond_wait_for_quit_pipe(-1); |
917a718d | 1850 | |
0d64e8fb | 1851 | stop_threads: |
90aa04a1 | 1852 | |
917a718d JG |
1853 | /* |
1854 | * Ensure that the client thread is no longer accepting new commands, | |
1855 | * which could cause new sessions to be created. | |
1856 | */ | |
0d64e8fb JG |
1857 | if (client_thread) { |
1858 | lttng_thread_shutdown(client_thread); | |
917a718d | 1859 | lttng_thread_put(client_thread); |
917a718d JG |
1860 | } |
1861 | ||
99d688f2 | 1862 | destroy_all_sessions_and_wait(); |
0d64e8fb | 1863 | |
b69a1b40 JG |
1864 | /* |
1865 | * At this point no new trigger can be registered (no sessions are | |
1866 | * running/rotating) and clients can't connect to the session daemon | |
1867 | * anymore. Unregister all triggers. | |
1868 | */ | |
1869 | unregister_all_triggers(); | |
1870 | ||
bd9addf7 JG |
1871 | if (register_apps_thread) { |
1872 | lttng_thread_shutdown(register_apps_thread); | |
1873 | lttng_thread_put(register_apps_thread); | |
1874 | } | |
a3707772 | 1875 | lttng_thread_list_shutdown_orphans(); |
917a718d | 1876 | |
4d62fbf8 MD |
1877 | /* |
1878 | * Wait for all pending call_rcu work to complete before tearing | |
1879 | * down data structures. call_rcu worker may be trying to | |
1880 | * perform lookups in those structures. | |
1881 | */ | |
1882 | rcu_barrier(); | |
4a15001e MD |
1883 | /* |
1884 | * sessiond_cleanup() is called when no other thread is running, except | |
1885 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
1886 | */ | |
1887 | rcu_thread_online(); | |
1888 | sessiond_cleanup(); | |
06f525de | 1889 | |
3b8a092f | 1890 | /* |
1d25334c | 1891 | * Wait for all pending call_rcu work to complete before shutting down |
3b8a092f FD |
1892 | * the notification thread. This call_rcu work includes shutting down |
1893 | * UST apps and event notifier pipes. | |
1894 | */ | |
1895 | rcu_barrier(); | |
1896 | ||
4a91420c JG |
1897 | if (notification_thread) { |
1898 | lttng_thread_shutdown(notification_thread); | |
1899 | lttng_thread_put(notification_thread); | |
1900 | } | |
1901 | ||
90aa04a1 | 1902 | /* |
1d25334c FD |
1903 | * Error accounting teardown has to be done after the teardown of all |
1904 | * event notifier pipes to ensure that no tracer may try to use the | |
1905 | * error accounting facilities. | |
90aa04a1 FD |
1906 | */ |
1907 | event_notifier_error_accounting_fini(); | |
1908 | ||
1d25334c FD |
1909 | /* |
1910 | * Unloading the kernel modules needs to be done after all kernel | |
1911 | * ressources have been released. In our case, this includes the | |
1912 | * notification fd, the event notifier group fd, error accounting fd, | |
1913 | * all event and event notifier fds, etc. | |
1914 | * | |
1915 | * In short, at this point, we need to have called close() on all fds | |
1916 | * received from the kernel tracer. | |
1917 | */ | |
1918 | if (is_root && !config.no_kernel) { | |
1919 | DBG("Unloading kernel modules"); | |
1920 | modprobe_remove_lttng_all(); | |
1921 | } | |
1922 | ||
c4d5de9d JG |
1923 | /* |
1924 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
1925 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
1926 | * the queue is empty before shutting down the clean-up thread. | |
1927 | */ | |
1928 | rcu_barrier(); | |
1929 | ||
a3707772 JG |
1930 | if (ht_cleanup_thread) { |
1931 | lttng_thread_shutdown(ht_cleanup_thread); | |
1932 | lttng_thread_put(ht_cleanup_thread); | |
1933 | } | |
1934 | ||
64d9b072 JG |
1935 | rcu_thread_offline(); |
1936 | rcu_unregister_thread(); | |
1937 | ||
1938 | if (rotation_thread_handle) { | |
1939 | rotation_thread_handle_destroy(rotation_thread_handle); | |
1940 | } | |
1941 | ||
d086f507 JD |
1942 | /* |
1943 | * After the rotation and timer thread have quit, we can safely destroy | |
1944 | * the rotation_timer_queue. | |
1945 | */ | |
92816cc3 | 1946 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
c8a9de5a JG |
1947 | /* |
1948 | * The teardown of the notification system is performed after the | |
1949 | * session daemon's teardown in order to allow it to be notified | |
1950 | * of the active session and channels at the moment of the teardown. | |
1951 | */ | |
1952 | if (notification_thread_handle) { | |
1953 | notification_thread_handle_destroy(notification_thread_handle); | |
1954 | } | |
b3530820 JG |
1955 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
1956 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
1957 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
4a15001e | 1958 | |
9bc2ec5f JR |
1959 | if (health_sessiond) { |
1960 | health_app_destroy(health_sessiond); | |
1961 | } | |
7567352f | 1962 | exit_create_run_as_worker_cleanup: |
4a15001e | 1963 | exit_options: |
f472090a | 1964 | sessiond_cleanup_lock_file(); |
4a15001e MD |
1965 | sessiond_cleanup_options(); |
1966 | ||
1967 | exit_set_signal_handler: | |
1968 | if (!retval) { | |
cf3af59e | 1969 | exit(EXIT_SUCCESS); |
4a15001e MD |
1970 | } else { |
1971 | exit(EXIT_FAILURE); | |
67e40797 | 1972 | } |
fac6795d | 1973 | } |