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" |
ebaeda94 | 77 | |
4fc83d94 PP |
78 | static const char *help_msg = |
79 | #ifdef LTTNG_EMBED_HELP | |
80 | #include <lttng-sessiond.8.h> | |
81 | #else | |
82 | NULL | |
83 | #endif | |
84 | ; | |
85 | ||
90aa04a1 FD |
86 | #define EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX 65535 |
87 | ||
fac6795d | 88 | const char *progname; |
c9cb3e7d | 89 | static int lockfile_fd = -1; |
a3bc3918 | 90 | static int opt_print_version; |
3bd1e081 | 91 | |
0bb7724a DG |
92 | /* Set to 1 when a SIGUSR1 signal is received. */ |
93 | static int recv_child_signal; | |
94 | ||
26296c48 JG |
95 | /* Command line options */ |
96 | static const struct option long_options[] = { | |
0f5ea17c JG |
97 | { "client-sock", required_argument, 0, 'c' }, |
98 | { "apps-sock", required_argument, 0, 'a' }, | |
99 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
100 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
101 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
102 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
103 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
104 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
105 | { "consumerd32-path", required_argument, 0, '\0' }, | |
106 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
107 | { "consumerd64-path", required_argument, 0, '\0' }, | |
108 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
109 | { "daemonize", no_argument, 0, 'd' }, | |
110 | { "background", no_argument, 0, 'b' }, | |
111 | { "sig-parent", no_argument, 0, 'S' }, | |
112 | { "help", no_argument, 0, 'h' }, | |
113 | { "group", required_argument, 0, 'g' }, | |
114 | { "version", no_argument, 0, 'V' }, | |
115 | { "quiet", no_argument, 0, 'q' }, | |
116 | { "verbose", no_argument, 0, 'v' }, | |
117 | { "verbose-consumer", no_argument, 0, '\0' }, | |
118 | { "no-kernel", no_argument, 0, '\0' }, | |
119 | { "pidfile", required_argument, 0, 'p' }, | |
120 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
121 | { "config", required_argument, 0, 'f' }, | |
122 | { "load", required_argument, 0, 'l' }, | |
123 | { "kmod-probes", required_argument, 0, '\0' }, | |
124 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
90aa04a1 | 125 | { "event-notifier-error-number-of-bucket", required_argument, 0, '\0' }, |
26296c48 JG |
126 | { NULL, 0, 0, 0 } |
127 | }; | |
128 | ||
129 | /* Command line options to ignore from configuration file */ | |
130 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
1d4b027a | 131 | |
099e26bd DG |
132 | /* |
133 | * This pipe is used to inform the thread managing application communication | |
134 | * that a command is queued and ready to be processed. | |
135 | */ | |
76d7553f | 136 | static int apps_cmd_pipe[2] = { -1, -1 }; |
971a61c6 | 137 | static int apps_cmd_notify_pipe[2] = { -1, -1 }; |
099e26bd | 138 | |
099e26bd DG |
139 | /* |
140 | * UST registration command queue. This queue is tied with a futex and uses a N | |
141 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
142 | * | |
b22c5da8 DG |
143 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
144 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
145 | * the line new application socket and monitors it for any I/O error or clean | |
146 | * close that triggers an unregistration of the application. | |
099e26bd DG |
147 | */ |
148 | static struct ust_cmd_queue ust_cmd_queue; | |
149 | ||
97bc1426 | 150 | /* |
a7333da7 | 151 | * Section name to look for in the daemon configuration file. |
97bc1426 | 152 | */ |
a7333da7 | 153 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 154 | |
a7333da7 JG |
155 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
156 | static int is_root; | |
5eb91c98 | 157 | |
099e26bd DG |
158 | /* |
159 | * Stop all threads by closing the thread quit pipe. | |
160 | */ | |
cf3af59e MD |
161 | static void stop_threads(void) |
162 | { | |
5eb91c98 DG |
163 | int ret; |
164 | ||
cf3af59e MD |
165 | /* Stopping all threads */ |
166 | DBG("Terminating all threads"); | |
a7333da7 | 167 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
168 | if (ret < 0) { |
169 | ERR("write error on thread quit pipe"); | |
170 | } | |
cf3af59e MD |
171 | } |
172 | ||
e975f9f8 DG |
173 | /* |
174 | * Close every consumer sockets. | |
175 | */ | |
176 | static void close_consumer_sockets(void) | |
177 | { | |
178 | int ret; | |
179 | ||
180 | if (kconsumer_data.err_sock >= 0) { | |
181 | ret = close(kconsumer_data.err_sock); | |
182 | if (ret < 0) { | |
183 | PERROR("kernel consumer err_sock close"); | |
184 | } | |
185 | } | |
186 | if (ustconsumer32_data.err_sock >= 0) { | |
187 | ret = close(ustconsumer32_data.err_sock); | |
188 | if (ret < 0) { | |
a76cbd9f | 189 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
190 | } |
191 | } | |
192 | if (ustconsumer64_data.err_sock >= 0) { | |
193 | ret = close(ustconsumer64_data.err_sock); | |
194 | if (ret < 0) { | |
a76cbd9f | 195 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
196 | } |
197 | } | |
198 | if (kconsumer_data.cmd_sock >= 0) { | |
199 | ret = close(kconsumer_data.cmd_sock); | |
200 | if (ret < 0) { | |
201 | PERROR("kernel consumer cmd_sock close"); | |
202 | } | |
203 | } | |
204 | if (ustconsumer32_data.cmd_sock >= 0) { | |
205 | ret = close(ustconsumer32_data.cmd_sock); | |
206 | if (ret < 0) { | |
a76cbd9f | 207 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
208 | } |
209 | } | |
210 | if (ustconsumer64_data.cmd_sock >= 0) { | |
211 | ret = close(ustconsumer64_data.cmd_sock); | |
212 | if (ret < 0) { | |
a76cbd9f | 213 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
214 | } |
215 | } | |
b3530820 JG |
216 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
217 | ret = close(kconsumer_data.channel_monitor_pipe); | |
218 | if (ret < 0) { | |
219 | PERROR("kernel consumer channel monitor pipe close"); | |
220 | } | |
221 | } | |
222 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
223 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
224 | if (ret < 0) { | |
225 | PERROR("UST consumerd32 channel monitor pipe close"); | |
226 | } | |
227 | } | |
228 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
229 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
230 | if (ret < 0) { | |
231 | PERROR("UST consumerd64 channel monitor pipe close"); | |
232 | } | |
233 | } | |
e975f9f8 DG |
234 | } |
235 | ||
4e4714cb JR |
236 | /* |
237 | * Wait on consumer process termination. | |
238 | * | |
239 | * Need to be called with the consumer data lock held or from a context | |
240 | * ensuring no concurrent access to data (e.g: cleanup). | |
241 | */ | |
242 | static void wait_consumer(struct consumer_data *consumer_data) | |
243 | { | |
244 | pid_t ret; | |
245 | int status; | |
246 | ||
247 | if (consumer_data->pid <= 0) { | |
248 | return; | |
249 | } | |
250 | ||
251 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
252 | consumer_data->pid); | |
253 | ret = waitpid(consumer_data->pid, &status, 0); | |
254 | if (ret == -1) { | |
255 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 256 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
257 | ERR("consumerd termination with error: %d", |
258 | WEXITSTATUS(ret)); | |
259 | } | |
260 | consumer_data->pid = 0; | |
261 | } | |
262 | ||
fac6795d | 263 | /* |
4a15001e | 264 | * Cleanup the session daemon's data structures. |
fac6795d | 265 | */ |
4a15001e | 266 | static void sessiond_cleanup(void) |
fac6795d | 267 | { |
ef599319 | 268 | int ret; |
e32d7f27 | 269 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 270 | |
4a15001e | 271 | DBG("Cleanup sessiond"); |
e07ae692 | 272 | |
4e449f3f MD |
273 | /* |
274 | * Close the thread quit pipe. It has already done its job, | |
275 | * since we are now called. | |
276 | */ | |
a7333da7 | 277 | sessiond_close_quit_pipe(); |
971a61c6 JG |
278 | utils_close_pipe(apps_cmd_pipe); |
279 | utils_close_pipe(apps_cmd_notify_pipe); | |
5b093681 | 280 | utils_close_pipe(kernel_poll_pipe); |
2f77fc4b | 281 | |
c9a2957d JG |
282 | ret = remove(config.pid_file_path.value); |
283 | if (ret < 0) { | |
284 | PERROR("remove pidfile %s", config.pid_file_path.value); | |
35f90c40 DG |
285 | } |
286 | ||
e6142f2e JG |
287 | DBG("Removing sessiond and consumerd content of directory %s", |
288 | config.rundir.value); | |
8c6c56c2 MD |
289 | |
290 | /* sessiond */ | |
e6142f2e JG |
291 | DBG("Removing %s", config.pid_file_path.value); |
292 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 293 | |
e6142f2e JG |
294 | DBG("Removing %s", config.agent_port_file_path.value); |
295 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 296 | |
8c6c56c2 | 297 | /* kconsumerd */ |
e6142f2e JG |
298 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
299 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
300 | ||
301 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
302 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
303 | |
304 | /* ust consumerd 32 */ | |
e6142f2e JG |
305 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
306 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
307 | ||
308 | DBG("Removing directory %s", config.consumerd32_path.value); | |
309 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
310 | |
311 | /* ust consumerd 64 */ | |
e6142f2e JG |
312 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
313 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
314 | ||
315 | DBG("Removing directory %s", config.consumerd64_path.value); | |
316 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 317 | |
99d688f2 | 318 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 319 | |
44760c20 JR |
320 | DBG("Cleaning up all per-event notifier domain agents"); |
321 | agent_by_event_notifier_domain_ht_destroy(); | |
322 | ||
6a4e4039 JG |
323 | DBG("Cleaning up all agent apps"); |
324 | agent_app_ht_clean(); | |
099e26bd | 325 | DBG("Closing all UST sockets"); |
56fff090 | 326 | ust_app_clean_list(); |
7972aab2 | 327 | buffer_reg_destroy_registries(); |
099e26bd | 328 | |
0787fc4b MD |
329 | close_consumer_sockets(); |
330 | ||
331 | wait_consumer(&kconsumer_data); | |
332 | wait_consumer(&ustconsumer64_data); | |
333 | wait_consumer(&ustconsumer32_data); | |
334 | ||
e6142f2e | 335 | if (is_root && !config.no_kernel) { |
7d268848 | 336 | cleanup_kernel_tracer(); |
2f50c8a3 | 337 | } |
2f77fc4b | 338 | |
c9cb3e7d JG |
339 | /* |
340 | * We do NOT rmdir rundir because there are other processes | |
341 | * using it, for instance lttng-relayd, which can start in | |
342 | * parallel with this teardown. | |
343 | */ | |
4a15001e MD |
344 | } |
345 | ||
346 | /* | |
347 | * Cleanup the daemon's option data structures. | |
348 | */ | |
349 | static void sessiond_cleanup_options(void) | |
350 | { | |
351 | DBG("Cleaning up options"); | |
352 | ||
e6142f2e | 353 | sessiond_config_fini(&config); |
c9cb3e7d | 354 | |
7567352f | 355 | run_as_destroy_worker(); |
fac6795d DG |
356 | } |
357 | ||
917a718d | 358 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 359 | { |
917a718d | 360 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
361 | } |
362 | ||
00e2e675 | 363 | /* |
917a718d JG |
364 | * Take an option from the getopt output and set it in the right variable to be |
365 | * used later. | |
36b588ed | 366 | * |
917a718d | 367 | * Return 0 on success else a negative value. |
00e2e675 | 368 | */ |
917a718d | 369 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 370 | { |
917a718d | 371 | int ret = 0; |
fac6795d | 372 | |
c0232ea5 | 373 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
374 | if (!arg || *arg == '\0') { |
375 | ret = -EINVAL; | |
376 | goto end; | |
377 | } | |
e8fa9fb0 MD |
378 | if (lttng_is_setuid_setgid()) { |
379 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
380 | "-c, --client-sock"); | |
381 | } else { | |
e6142f2e JG |
382 | config_string_set(&config.client_unix_sock_path, |
383 | strdup(arg)); | |
384 | if (!config.client_unix_sock_path.value) { | |
385 | ret = -ENOMEM; | |
386 | PERROR("strdup"); | |
387 | } | |
e8fa9fb0 | 388 | } |
c0232ea5 | 389 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
390 | if (!arg || *arg == '\0') { |
391 | ret = -EINVAL; | |
392 | goto end; | |
393 | } | |
e8fa9fb0 MD |
394 | if (lttng_is_setuid_setgid()) { |
395 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
396 | "-a, --apps-sock"); | |
397 | } else { | |
e6142f2e JG |
398 | config_string_set(&config.apps_unix_sock_path, |
399 | strdup(arg)); | |
400 | if (!config.apps_unix_sock_path.value) { | |
401 | ret = -ENOMEM; | |
402 | PERROR("strdup"); | |
403 | } | |
e8fa9fb0 | 404 | } |
c0232ea5 | 405 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 406 | config.daemonize = true; |
c0232ea5 | 407 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 408 | config.background = true; |
c0232ea5 | 409 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
410 | if (!arg || *arg == '\0') { |
411 | ret = -EINVAL; | |
412 | goto end; | |
413 | } | |
e8fa9fb0 MD |
414 | if (lttng_is_setuid_setgid()) { |
415 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
416 | "-g, --group"); | |
417 | } else { | |
e6142f2e JG |
418 | config_string_set(&config.tracing_group_name, |
419 | strdup(arg)); | |
420 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 421 | ret = -ENOMEM; |
e6142f2e | 422 | PERROR("strdup"); |
e8fa9fb0 | 423 | } |
db322c4d | 424 | } |
c0232ea5 | 425 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 426 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 427 | if (ret) { |
4fc83d94 | 428 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
429 | perror("exec"); |
430 | } | |
431 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 432 | } else if (string_match(optname, "version") || opt == 'V') { |
a3bc3918 | 433 | opt_print_version = 1; |
c0232ea5 | 434 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 435 | config.sig_parent = true; |
c0232ea5 | 436 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
437 | if (!arg || *arg == '\0') { |
438 | ret = -EINVAL; | |
439 | goto end; | |
440 | } | |
e8fa9fb0 MD |
441 | if (lttng_is_setuid_setgid()) { |
442 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
443 | "--kconsumerd-err-sock"); | |
444 | } else { | |
e6142f2e JG |
445 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
446 | strdup(arg)); | |
447 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
448 | ret = -ENOMEM; | |
449 | PERROR("strdup"); | |
450 | } | |
e8fa9fb0 | 451 | } |
c0232ea5 | 452 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
453 | if (!arg || *arg == '\0') { |
454 | ret = -EINVAL; | |
455 | goto end; | |
456 | } | |
e8fa9fb0 MD |
457 | if (lttng_is_setuid_setgid()) { |
458 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
459 | "--kconsumerd-cmd-sock"); | |
460 | } else { | |
e6142f2e JG |
461 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
462 | strdup(arg)); | |
463 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
464 | ret = -ENOMEM; | |
465 | PERROR("strdup"); | |
466 | } | |
e8fa9fb0 | 467 | } |
c0232ea5 | 468 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
469 | if (!arg || *arg == '\0') { |
470 | ret = -EINVAL; | |
471 | goto end; | |
472 | } | |
e8fa9fb0 MD |
473 | if (lttng_is_setuid_setgid()) { |
474 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
475 | "--ustconsumerd64-err-sock"); | |
476 | } else { | |
e6142f2e JG |
477 | config_string_set(&config.consumerd64_err_unix_sock_path, |
478 | strdup(arg)); | |
479 | if (!config.consumerd64_err_unix_sock_path.value) { | |
480 | ret = -ENOMEM; | |
481 | PERROR("strdup"); | |
482 | } | |
e8fa9fb0 | 483 | } |
c0232ea5 | 484 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
485 | if (!arg || *arg == '\0') { |
486 | ret = -EINVAL; | |
487 | goto end; | |
488 | } | |
e8fa9fb0 MD |
489 | if (lttng_is_setuid_setgid()) { |
490 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
491 | "--ustconsumerd64-cmd-sock"); | |
492 | } else { | |
e6142f2e JG |
493 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
494 | strdup(arg)); | |
495 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
496 | ret = -ENOMEM; | |
497 | PERROR("strdup"); | |
498 | } | |
e8fa9fb0 | 499 | } |
c0232ea5 | 500 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
501 | if (!arg || *arg == '\0') { |
502 | ret = -EINVAL; | |
503 | goto end; | |
504 | } | |
e8fa9fb0 MD |
505 | if (lttng_is_setuid_setgid()) { |
506 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
507 | "--ustconsumerd32-err-sock"); | |
508 | } else { | |
e6142f2e JG |
509 | config_string_set(&config.consumerd32_err_unix_sock_path, |
510 | strdup(arg)); | |
511 | if (!config.consumerd32_err_unix_sock_path.value) { | |
512 | ret = -ENOMEM; | |
513 | PERROR("strdup"); | |
514 | } | |
e8fa9fb0 | 515 | } |
c0232ea5 | 516 | } else if (string_match(optname, "ustconsumerd32-cmd-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-cmd-sock"); | |
524 | } else { | |
e6142f2e JG |
525 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
526 | strdup(arg)); | |
527 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
528 | ret = -ENOMEM; | |
529 | PERROR("strdup"); | |
530 | } | |
e8fa9fb0 | 531 | } |
c0232ea5 | 532 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 533 | config.no_kernel = true; |
c0232ea5 | 534 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 535 | config.quiet = true; |
c0232ea5 | 536 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
537 | /* Verbose level can increase using multiple -v */ |
538 | if (arg) { | |
13755a18 | 539 | /* Value obtained from config file */ |
e6142f2e | 540 | config.verbose = config_parse_value(arg); |
26296c48 | 541 | } else { |
13755a18 | 542 | /* -v used on command line */ |
e6142f2e | 543 | config.verbose++; |
26296c48 | 544 | } |
13755a18 | 545 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
546 | config.verbose = config.verbose < 0 ? 0 : |
547 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 548 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 549 | if (arg) { |
e6142f2e | 550 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 551 | } else { |
e6142f2e | 552 | config.verbose_consumer++; |
26296c48 | 553 | } |
c0232ea5 | 554 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
555 | if (!arg || *arg == '\0') { |
556 | ret = -EINVAL; | |
557 | goto end; | |
558 | } | |
e8fa9fb0 MD |
559 | if (lttng_is_setuid_setgid()) { |
560 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
561 | "--consumerd32-path"); | |
562 | } else { | |
e6142f2e JG |
563 | config_string_set(&config.consumerd32_bin_path, |
564 | strdup(arg)); | |
565 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
566 | PERROR("strdup"); |
567 | ret = -ENOMEM; | |
568 | } | |
db322c4d | 569 | } |
c0232ea5 | 570 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
571 | if (!arg || *arg == '\0') { |
572 | ret = -EINVAL; | |
573 | goto end; | |
574 | } | |
e8fa9fb0 MD |
575 | if (lttng_is_setuid_setgid()) { |
576 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
577 | "--consumerd32-libdir"); | |
578 | } else { | |
e6142f2e JG |
579 | config_string_set(&config.consumerd32_lib_dir, |
580 | strdup(arg)); | |
581 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
582 | PERROR("strdup"); |
583 | ret = -ENOMEM; | |
584 | } | |
db322c4d | 585 | } |
c0232ea5 | 586 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
587 | if (!arg || *arg == '\0') { |
588 | ret = -EINVAL; | |
589 | goto end; | |
590 | } | |
e8fa9fb0 MD |
591 | if (lttng_is_setuid_setgid()) { |
592 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
593 | "--consumerd64-path"); | |
594 | } else { | |
e6142f2e JG |
595 | config_string_set(&config.consumerd64_bin_path, |
596 | strdup(arg)); | |
597 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
598 | PERROR("strdup"); |
599 | ret = -ENOMEM; | |
600 | } | |
db322c4d | 601 | } |
c0232ea5 | 602 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
603 | if (!arg || *arg == '\0') { |
604 | ret = -EINVAL; | |
605 | goto end; | |
606 | } | |
e8fa9fb0 MD |
607 | if (lttng_is_setuid_setgid()) { |
608 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
609 | "--consumerd64-libdir"); | |
610 | } else { | |
e6142f2e JG |
611 | config_string_set(&config.consumerd64_lib_dir, |
612 | strdup(arg)); | |
613 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
614 | PERROR("strdup"); |
615 | ret = -ENOMEM; | |
616 | } | |
db322c4d | 617 | } |
c0232ea5 | 618 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
619 | if (!arg || *arg == '\0') { |
620 | ret = -EINVAL; | |
621 | goto end; | |
622 | } | |
e8fa9fb0 MD |
623 | if (lttng_is_setuid_setgid()) { |
624 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
625 | "-p, --pidfile"); | |
626 | } else { | |
e6142f2e JG |
627 | config_string_set(&config.pid_file_path, strdup(arg)); |
628 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
629 | PERROR("strdup"); |
630 | ret = -ENOMEM; | |
631 | } | |
db322c4d | 632 | } |
c0232ea5 | 633 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
634 | if (!arg || *arg == '\0') { |
635 | ret = -EINVAL; | |
636 | goto end; | |
637 | } | |
e8fa9fb0 MD |
638 | if (lttng_is_setuid_setgid()) { |
639 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
640 | "--agent-tcp-port"); | |
641 | } else { | |
642 | unsigned long v; | |
4d076222 | 643 | |
e8fa9fb0 MD |
644 | errno = 0; |
645 | v = strtoul(arg, NULL, 0); | |
646 | if (errno != 0 || !isdigit(arg[0])) { | |
647 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
648 | return -1; | |
649 | } | |
650 | if (v == 0 || v >= 65535) { | |
651 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
652 | return -1; | |
653 | } | |
2288467f JG |
654 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
655 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 656 | } |
c0232ea5 | 657 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
658 | if (!arg || *arg == '\0') { |
659 | ret = -EINVAL; | |
660 | goto end; | |
661 | } | |
e8fa9fb0 MD |
662 | if (lttng_is_setuid_setgid()) { |
663 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
664 | "-l, --load"); | |
665 | } else { | |
3cfcd698 | 666 | config_string_set(&config.load_session_path, strdup(arg)); |
e6142f2e | 667 | if (!config.load_session_path.value) { |
e8fa9fb0 MD |
668 | PERROR("strdup"); |
669 | ret = -ENOMEM; | |
670 | } | |
ef367a93 | 671 | } |
c0232ea5 | 672 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
673 | if (!arg || *arg == '\0') { |
674 | ret = -EINVAL; | |
675 | goto end; | |
676 | } | |
e8fa9fb0 MD |
677 | if (lttng_is_setuid_setgid()) { |
678 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
679 | "--kmod-probes"); | |
680 | } else { | |
e6142f2e JG |
681 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
682 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
683 | PERROR("strdup"); |
684 | ret = -ENOMEM; | |
685 | } | |
c9d42407 | 686 | } |
c0232ea5 | 687 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
688 | if (!arg || *arg == '\0') { |
689 | ret = -EINVAL; | |
690 | goto end; | |
691 | } | |
e8fa9fb0 MD |
692 | if (lttng_is_setuid_setgid()) { |
693 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
694 | "--extra-kmod-probes"); | |
695 | } else { | |
e6142f2e JG |
696 | config_string_set(&config.kmod_extra_probes_list, |
697 | strdup(arg)); | |
698 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
699 | PERROR("strdup"); |
700 | ret = -ENOMEM; | |
701 | } | |
db322c4d | 702 | } |
90aa04a1 FD |
703 | } else if (string_match(optname, "event-notifier-error-number-of-bucket")) { |
704 | unsigned long v; | |
705 | ||
706 | errno = 0; | |
707 | v = strtoul(arg, NULL, 0); | |
708 | if (errno != 0 || !isdigit(arg[0])) { | |
709 | ERR("Wrong value in --event-notifier-error-number-of-bucket parameter: %s", arg); | |
710 | return -1; | |
711 | } | |
712 | if (v == 0 || v >= EVENT_NOTIFIER_ERROR_COUNTER_NUMBER_OF_BUCKET_MAX) { | |
713 | ERR("Value out of range for --event-notifier-error-number-of-bucket parameter: %s", arg); | |
714 | return -1; | |
715 | } | |
716 | config.event_notifier_error_counter_bucket = (int) v; | |
717 | DBG3("Number of event notifier error counter set to non default: %i", | |
718 | config.event_notifier_error_counter_bucket); | |
719 | goto end; | |
c0232ea5 JG |
720 | } else if (string_match(optname, "config") || opt == 'f') { |
721 | /* This is handled in set_options() thus silent skip. */ | |
722 | goto end; | |
723 | } else { | |
26296c48 JG |
724 | /* Unknown option or other error. |
725 | * Error is printed by getopt, just return */ | |
726 | ret = -1; | |
727 | } | |
728 | ||
f3dd7ce7 | 729 | end: |
c5d350b2 JG |
730 | if (ret == -EINVAL) { |
731 | const char *opt_name = "unknown"; | |
732 | int i; | |
733 | ||
734 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
735 | i++) { | |
736 | if (opt == long_options[i].val) { | |
737 | opt_name = long_options[i].name; | |
738 | break; | |
739 | } | |
740 | } | |
741 | ||
742 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
743 | opt_name); | |
744 | } | |
f3dd7ce7 | 745 | |
26296c48 JG |
746 | return ret; |
747 | } | |
748 | ||
749 | /* | |
750 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 751 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
752 | * return value conventions. |
753 | */ | |
754 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
755 | { | |
756 | int ret = 0, i; | |
757 | ||
758 | if (!entry || !entry->name || !entry->value) { | |
759 | ret = -EINVAL; | |
760 | goto end; | |
761 | } | |
762 | ||
763 | /* Check if the option is to be ignored */ | |
764 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
765 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
766 | goto end; | |
767 | } | |
768 | } | |
769 | ||
770 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
771 | i++) { | |
772 | ||
773 | /* Ignore if not fully matched. */ | |
774 | if (strcmp(entry->name, long_options[i].name)) { | |
775 | continue; | |
776 | } | |
777 | ||
778 | /* | |
779 | * If the option takes no argument on the command line, we have to | |
780 | * check if the value is "true". We support non-zero numeric values, | |
781 | * true, on and yes. | |
782 | */ | |
783 | if (!long_options[i].has_arg) { | |
784 | ret = config_parse_value(entry->value); | |
785 | if (ret <= 0) { | |
786 | if (ret) { | |
787 | WARN("Invalid configuration value \"%s\" for option %s", | |
788 | entry->value, entry->name); | |
789 | } | |
790 | /* False, skip boolean config option. */ | |
791 | goto end; | |
4d076222 | 792 | } |
26296c48 JG |
793 | } |
794 | ||
795 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
796 | goto end; | |
797 | } | |
798 | ||
799 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
800 | ||
801 | end: | |
802 | return ret; | |
803 | } | |
804 | ||
a3bc3918 JR |
805 | static void print_version(void) { |
806 | fprintf(stdout, "%s\n", VERSION); | |
807 | } | |
808 | ||
26296c48 JG |
809 | /* |
810 | * daemon configuration loading and argument parsing | |
811 | */ | |
812 | static int set_options(int argc, char **argv) | |
813 | { | |
814 | int ret = 0, c = 0, option_index = 0; | |
815 | int orig_optopt = optopt, orig_optind = optind; | |
816 | char *optstring; | |
817 | const char *config_path = NULL; | |
818 | ||
819 | optstring = utils_generate_optstring(long_options, | |
820 | sizeof(long_options) / sizeof(struct option)); | |
821 | if (!optstring) { | |
822 | ret = -ENOMEM; | |
823 | goto end; | |
824 | } | |
825 | ||
826 | /* Check for the --config option */ | |
827 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
828 | &option_index)) != -1) { | |
829 | if (c == '?') { | |
830 | ret = -EINVAL; | |
831 | goto end; | |
832 | } else if (c != 'f') { | |
833 | /* if not equal to --config option. */ | |
834 | continue; | |
835 | } | |
836 | ||
e8fa9fb0 MD |
837 | if (lttng_is_setuid_setgid()) { |
838 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
839 | "-f, --config"); | |
840 | } else { | |
841 | config_path = utils_expand_path(optarg); | |
842 | if (!config_path) { | |
843 | ERR("Failed to resolve path: %s", optarg); | |
844 | } | |
26296c48 JG |
845 | } |
846 | } | |
847 | ||
848 | ret = config_get_section_entries(config_path, config_section_name, | |
849 | config_entry_handler, NULL); | |
850 | if (ret) { | |
851 | if (ret > 0) { | |
852 | ERR("Invalid configuration option at line %i", ret); | |
853 | ret = -1; | |
854 | } | |
855 | goto end; | |
856 | } | |
857 | ||
858 | /* Reset getopt's global state */ | |
859 | optopt = orig_optopt; | |
860 | optind = orig_optind; | |
861 | while (1) { | |
c0232ea5 JG |
862 | option_index = -1; |
863 | /* | |
864 | * getopt_long() will not set option_index if it encounters a | |
865 | * short option. | |
866 | */ | |
867 | c = getopt_long(argc, argv, optstring, long_options, | |
868 | &option_index); | |
26296c48 | 869 | if (c == -1) { |
4d076222 DG |
870 | break; |
871 | } | |
26296c48 | 872 | |
c0232ea5 JG |
873 | /* |
874 | * Pass NULL as the long option name if popt left the index | |
875 | * unset. | |
876 | */ | |
877 | ret = set_option(c, optarg, | |
878 | option_index < 0 ? NULL : | |
879 | long_options[option_index].name); | |
26296c48 JG |
880 | if (ret < 0) { |
881 | break; | |
fac6795d DG |
882 | } |
883 | } | |
884 | ||
26296c48 JG |
885 | end: |
886 | free(optstring); | |
887 | return ret; | |
fac6795d DG |
888 | } |
889 | ||
f472090a JG |
890 | /* |
891 | * Create lockfile using the rundir and return its fd. | |
892 | */ | |
893 | static int create_lockfile(void) | |
894 | { | |
3cfcd698 | 895 | return utils_create_lock_file(config.lock_file_path.value); |
f472090a JG |
896 | } |
897 | ||
fac6795d | 898 | /* |
54d01ffb DG |
899 | * Check if the global socket is available, and if a daemon is answering at the |
900 | * other side. If yes, error is returned. | |
f472090a JG |
901 | * |
902 | * Also attempts to create and hold the lock file. | |
fac6795d | 903 | */ |
cf3af59e | 904 | static int check_existing_daemon(void) |
fac6795d | 905 | { |
f472090a JG |
906 | int ret = 0; |
907 | ||
7d8234d9 | 908 | /* Is there anybody out there ? */ |
099e26bd | 909 | if (lttng_session_daemon_alive()) { |
f472090a JG |
910 | ret = -EEXIST; |
911 | goto end; | |
099e26bd | 912 | } |
b09c7c76 | 913 | |
f472090a JG |
914 | lockfile_fd = create_lockfile(); |
915 | if (lockfile_fd < 0) { | |
916 | ret = -EEXIST; | |
917 | goto end; | |
918 | } | |
919 | end: | |
920 | return ret; | |
921 | } | |
922 | ||
923 | static void sessiond_cleanup_lock_file(void) | |
924 | { | |
925 | int ret; | |
926 | ||
927 | /* | |
928 | * Cleanup lock file by deleting it and finaly closing it which will | |
929 | * release the file system lock. | |
930 | */ | |
931 | if (lockfile_fd >= 0) { | |
932 | ret = remove(config.lock_file_path.value); | |
933 | if (ret < 0) { | |
934 | PERROR("remove lock file"); | |
935 | } | |
936 | ret = close(lockfile_fd); | |
937 | if (ret < 0) { | |
938 | PERROR("close lock file"); | |
939 | } | |
940 | } | |
fac6795d DG |
941 | } |
942 | ||
fac6795d | 943 | /* |
d063d709 | 944 | * Set the tracing group gid onto the client socket. |
5e16da05 | 945 | * |
d063d709 | 946 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 947 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 948 | */ |
be040666 | 949 | static int set_permissions(char *rundir) |
fac6795d DG |
950 | { |
951 | int ret; | |
996b65c8 | 952 | gid_t gid; |
fac6795d | 953 | |
28ab59d0 JR |
954 | ret = utils_get_group_id(config.tracing_group_name.value, true, &gid); |
955 | if (ret) { | |
956 | /* Default to root group. */ | |
957 | gid = 0; | |
958 | } | |
fac6795d | 959 | |
d6f42150 | 960 | /* Set lttng run dir */ |
be040666 | 961 | ret = chown(rundir, 0, gid); |
d6f42150 | 962 | if (ret < 0) { |
be040666 | 963 | ERR("Unable to set group on %s", rundir); |
76d7553f | 964 | PERROR("chown"); |
d6f42150 DG |
965 | } |
966 | ||
6c71277b MD |
967 | /* |
968 | * Ensure all applications and tracing group can search the run | |
969 | * dir. Allow everyone to read the directory, since it does not | |
970 | * buy us anything to hide its content. | |
971 | */ | |
972 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
973 | if (ret < 0) { |
974 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 975 | PERROR("chmod"); |
d1613cf5 JN |
976 | } |
977 | ||
d6f42150 | 978 | /* lttng client socket path */ |
e6142f2e | 979 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 980 | if (ret < 0) { |
e6142f2e | 981 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 982 | PERROR("chown"); |
d6f42150 DG |
983 | } |
984 | ||
3bd1e081 | 985 | /* kconsumer error socket path */ |
6c71277b | 986 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 987 | if (ret < 0) { |
3bd1e081 | 988 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 989 | PERROR("chown"); |
3bd1e081 MD |
990 | } |
991 | ||
7753dea8 | 992 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 993 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
994 | if (ret < 0) { |
995 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 996 | PERROR("chown"); |
7753dea8 MD |
997 | } |
998 | ||
999 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 1000 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1001 | if (ret < 0) { |
7753dea8 | 1002 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 1003 | PERROR("chown"); |
fac6795d DG |
1004 | } |
1005 | ||
d6f42150 | 1006 | DBG("All permissions are set"); |
e07ae692 | 1007 | |
fac6795d DG |
1008 | return ret; |
1009 | } | |
1010 | ||
d6f42150 | 1011 | /* |
d063d709 | 1012 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1013 | */ |
e6142f2e | 1014 | static int create_lttng_rundir(void) |
d6f42150 DG |
1015 | { |
1016 | int ret; | |
1017 | ||
e6142f2e | 1018 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 1019 | |
e6142f2e | 1020 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 1021 | if (ret < 0) { |
b1f11e69 | 1022 | if (errno != EEXIST) { |
e6142f2e | 1023 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
1024 | goto error; |
1025 | } else { | |
1026 | ret = 0; | |
1027 | } | |
d6f42150 DG |
1028 | } |
1029 | ||
1030 | error: | |
1031 | return ret; | |
1032 | } | |
1033 | ||
1034 | /* | |
e6142f2e | 1035 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1036 | * session daemon. |
d6f42150 | 1037 | */ |
e6142f2e | 1038 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1039 | { |
1040 | int ret; | |
e6142f2e | 1041 | char *path = NULL; |
d6f42150 | 1042 | |
6c71277b | 1043 | switch (consumer_data->type) { |
7753dea8 | 1044 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 1045 | path = config.kconsumerd_path.value; |
7753dea8 MD |
1046 | break; |
1047 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 1048 | path = config.consumerd64_path.value; |
7753dea8 MD |
1049 | break; |
1050 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 1051 | path = config.consumerd32_path.value; |
7753dea8 MD |
1052 | break; |
1053 | default: | |
1054 | ERR("Consumer type unknown"); | |
1055 | ret = -EINVAL; | |
1056 | goto error; | |
d6f42150 | 1057 | } |
e6142f2e | 1058 | assert(path); |
d6f42150 | 1059 | |
67e40797 DG |
1060 | DBG2("Creating consumer directory: %s", path); |
1061 | ||
6c71277b | 1062 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1063 | if (ret < 0 && errno != EEXIST) { |
1064 | PERROR("mkdir"); | |
1065 | ERR("Failed to create %s", path); | |
1066 | goto error; | |
d6f42150 | 1067 | } |
6c71277b | 1068 | if (is_root) { |
28ab59d0 JR |
1069 | gid_t gid; |
1070 | ||
1071 | ret = utils_get_group_id(config.tracing_group_name.value, true, | |
1072 | &gid); | |
1073 | if (ret) { | |
1074 | /* Default to root group. */ | |
1075 | gid = 0; | |
1076 | } | |
1077 | ||
1078 | ret = chown(path, 0, gid); | |
6c71277b MD |
1079 | if (ret < 0) { |
1080 | ERR("Unable to set group on %s", path); | |
1081 | PERROR("chown"); | |
1082 | goto error; | |
1083 | } | |
1084 | } | |
d6f42150 | 1085 | |
e6142f2e | 1086 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1087 | consumer_data->err_sock = |
1088 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1089 | if (consumer_data->err_sock < 0) { | |
1090 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1091 | ret = -1; |
1092 | goto error; | |
1093 | } | |
1094 | ||
a24f05ab MD |
1095 | /* |
1096 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1097 | * show must go on. | |
1098 | */ | |
1099 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1100 | if (ret < 0) { | |
1101 | PERROR("utils_set_fd_cloexec"); | |
1102 | /* continue anyway */ | |
1103 | } | |
1104 | ||
d6f42150 | 1105 | /* File permission MUST be 660 */ |
3bd1e081 | 1106 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 1107 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1108 | if (ret < 0) { |
3bd1e081 | 1109 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1110 | PERROR("chmod"); |
d6f42150 DG |
1111 | goto error; |
1112 | } | |
1113 | ||
1114 | error: | |
1115 | return ret; | |
1116 | } | |
1117 | ||
fac6795d | 1118 | /* |
d063d709 | 1119 | * Signal handler for the daemon |
cf3af59e | 1120 | * |
54d01ffb DG |
1121 | * Simply stop all worker threads, leaving main() return gracefully after |
1122 | * joining all threads and calling cleanup(). | |
fac6795d DG |
1123 | */ |
1124 | static void sighandler(int sig) | |
1125 | { | |
1126 | switch (sig) { | |
cf3af59e | 1127 | case SIGINT: |
af87c45a | 1128 | DBG("SIGINT caught"); |
cf3af59e MD |
1129 | stop_threads(); |
1130 | break; | |
1131 | case SIGTERM: | |
af87c45a | 1132 | DBG("SIGTERM caught"); |
cf3af59e MD |
1133 | stop_threads(); |
1134 | break; | |
0bb7724a DG |
1135 | case SIGUSR1: |
1136 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1137 | break; | |
cf3af59e MD |
1138 | default: |
1139 | break; | |
fac6795d | 1140 | } |
fac6795d DG |
1141 | } |
1142 | ||
1143 | /* | |
d063d709 | 1144 | * Setup signal handler for : |
1d4b027a | 1145 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1146 | */ |
1d4b027a | 1147 | static int set_signal_handler(void) |
fac6795d | 1148 | { |
1d4b027a DG |
1149 | int ret = 0; |
1150 | struct sigaction sa; | |
1151 | sigset_t sigset; | |
fac6795d | 1152 | |
1d4b027a | 1153 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1154 | PERROR("sigemptyset"); |
1d4b027a DG |
1155 | return ret; |
1156 | } | |
d6f42150 | 1157 | |
1d4b027a DG |
1158 | sa.sa_mask = sigset; |
1159 | sa.sa_flags = 0; | |
0072e5e2 MD |
1160 | |
1161 | sa.sa_handler = sighandler; | |
1d4b027a | 1162 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 1163 | PERROR("sigaction"); |
1d4b027a | 1164 | return ret; |
d6f42150 DG |
1165 | } |
1166 | ||
1d4b027a | 1167 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 1168 | PERROR("sigaction"); |
1d4b027a | 1169 | return ret; |
d6f42150 | 1170 | } |
aaf26714 | 1171 | |
0072e5e2 | 1172 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 1173 | PERROR("sigaction"); |
1d4b027a | 1174 | return ret; |
8c0faa1d DG |
1175 | } |
1176 | ||
0072e5e2 MD |
1177 | sa.sa_handler = SIG_IGN; |
1178 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
1179 | PERROR("sigaction"); |
1180 | return ret; | |
1181 | } | |
1182 | ||
1183 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
1184 | |
1185 | return ret; | |
fac6795d DG |
1186 | } |
1187 | ||
f3ed775e | 1188 | /* |
d063d709 | 1189 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1190 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
1191 | */ |
1192 | static void set_ulimit(void) | |
1193 | { | |
1194 | int ret; | |
1195 | struct rlimit lim; | |
1196 | ||
514bb9f0 | 1197 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1198 | lim.rlim_cur = 65535; |
1199 | lim.rlim_max = 65535; | |
1200 | ||
1201 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1202 | if (ret < 0) { | |
76d7553f | 1203 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1204 | } |
1205 | } | |
1206 | ||
4a15001e | 1207 | static int write_pidfile(void) |
35f90c40 | 1208 | { |
3cfcd698 | 1209 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
1210 | } |
1211 | ||
e6142f2e JG |
1212 | static int set_clock_plugin_env(void) |
1213 | { | |
1214 | int ret = 0; | |
1215 | char *env_value = NULL; | |
cd9290dd | 1216 | |
e6142f2e JG |
1217 | if (!config.lttng_ust_clock_plugin.value) { |
1218 | goto end; | |
1219 | } | |
1220 | ||
3cfcd698 | 1221 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", |
e6142f2e | 1222 | config.lttng_ust_clock_plugin.value); |
cd9290dd | 1223 | if (ret < 0) { |
e6142f2e JG |
1224 | PERROR("asprintf"); |
1225 | goto end; | |
cd9290dd DG |
1226 | } |
1227 | ||
e6142f2e JG |
1228 | ret = putenv(env_value); |
1229 | if (ret) { | |
1230 | free(env_value); | |
1231 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1232 | goto end; | |
1233 | } | |
cd9290dd | 1234 | |
e6142f2e JG |
1235 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
1236 | config.lttng_ust_clock_plugin.value); | |
1237 | end: | |
4a15001e | 1238 | return ret; |
ef367a93 JG |
1239 | } |
1240 | ||
99d688f2 JG |
1241 | static void destroy_all_sessions_and_wait(void) |
1242 | { | |
1243 | struct ltt_session *session, *tmp; | |
1244 | struct ltt_session_list *session_list; | |
1245 | ||
1246 | session_list = session_get_list(); | |
1247 | DBG("Initiating destruction of all sessions"); | |
1248 | ||
1249 | if (!session_list) { | |
1250 | return; | |
1251 | } | |
1252 | ||
99d688f2 JG |
1253 | session_lock_list(); |
1254 | /* Initiate the destruction of all sessions. */ | |
1255 | cds_list_for_each_entry_safe(session, tmp, | |
1256 | &session_list->head, list) { | |
1257 | if (!session_get(session)) { | |
1258 | continue; | |
1259 | } | |
1260 | ||
1261 | session_lock(session); | |
1262 | if (session->destroyed) { | |
1263 | goto unlock_session; | |
1264 | } | |
63763958 | 1265 | (void) cmd_stop_trace(session); |
3e3665b8 JG |
1266 | (void) cmd_destroy_session(session, notification_thread_handle, |
1267 | NULL); | |
99d688f2 JG |
1268 | unlock_session: |
1269 | session_unlock(session); | |
1270 | session_put(session); | |
1271 | } | |
1272 | session_unlock_list(); | |
1273 | ||
1274 | /* Wait for the destruction of all sessions to complete. */ | |
1275 | DBG("Waiting for the destruction of all sessions to complete"); | |
1276 | session_list_wait_empty(); | |
1277 | DBG("Destruction of all sessions completed"); | |
1278 | } | |
1279 | ||
b69a1b40 JG |
1280 | static void unregister_all_triggers(void) |
1281 | { | |
1282 | enum lttng_error_code ret_code; | |
1283 | enum lttng_trigger_status trigger_status; | |
1284 | struct lttng_triggers *triggers = NULL; | |
1285 | unsigned int trigger_count, i; | |
1286 | const struct lttng_credentials creds = { | |
1287 | .uid = LTTNG_OPTIONAL_INIT_VALUE(0), | |
1288 | }; | |
1289 | ||
1290 | DBG("Unregistering all triggers"); | |
1291 | ||
1292 | /* | |
1293 | * List all triggers as "root" since we wish to unregister all triggers. | |
1294 | */ | |
1295 | ret_code = notification_thread_command_list_triggers( | |
1296 | notification_thread_handle, creds.uid.value, &triggers); | |
1297 | if (ret_code != LTTNG_OK) { | |
1298 | ERR("Failed to list triggers while unregistering all triggers"); | |
1299 | goto end; | |
1300 | } | |
1301 | ||
1302 | trigger_status = lttng_triggers_get_count(triggers, &trigger_count); | |
1303 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1304 | ||
1305 | for (i = 0; i < trigger_count; i++) { | |
1306 | enum lttng_error_code ret_code; | |
1307 | uid_t trigger_owner; | |
1308 | const char *trigger_name; | |
1309 | const struct lttng_trigger *trigger = | |
1310 | lttng_triggers_get_at_index(triggers, i); | |
1311 | ||
1312 | assert(trigger); | |
1313 | ||
1314 | trigger_status = lttng_trigger_get_owner_uid( | |
1315 | trigger, &trigger_owner); | |
1316 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1317 | ||
1318 | trigger_status = lttng_trigger_get_name(trigger, &trigger_name); | |
1319 | assert(trigger_status == LTTNG_TRIGGER_STATUS_OK); | |
1320 | ||
1321 | DBG("Unregistering trigger: trigger owner uid = %d, trigger name = '%s'", | |
1322 | (int) trigger_owner, trigger_name); | |
1323 | ||
1324 | ret_code = cmd_unregister_trigger( | |
1325 | &creds, trigger, notification_thread_handle); | |
1326 | if (ret_code != LTTNG_OK) { | |
1327 | ERR("Failed to unregister trigger: trigger owner uid = %d, trigger name = '%s', error: '%s'", | |
1328 | (int) trigger_owner, trigger_name, | |
1329 | lttng_strerror(-ret_code)); | |
1330 | /* Continue to unregister the remaining triggers. */ | |
1331 | } | |
1332 | } | |
1333 | end: | |
1334 | lttng_triggers_destroy(triggers); | |
1335 | } | |
1336 | ||
929f71ec JG |
1337 | static int run_as_worker_post_fork_cleanup(void *data) |
1338 | { | |
1339 | struct sessiond_config *sessiond_config = data; | |
1340 | ||
1341 | sessiond_config_fini(sessiond_config); | |
1342 | return 0; | |
1343 | } | |
1344 | ||
1345 | static int launch_run_as_worker(const char *procname) | |
1346 | { | |
1347 | /* | |
1348 | * Clean-up before forking the run-as worker. Any dynamically | |
1349 | * allocated memory of which the worker is not aware will | |
1350 | * be leaked as the process forks a run-as worker (and performs | |
1351 | * no exec*()). The same would apply to any opened fd. | |
1352 | */ | |
1353 | return run_as_create_worker(procname, run_as_worker_post_fork_cleanup, | |
1354 | &config); | |
1355 | } | |
1356 | ||
52a0e931 JG |
1357 | static void sessiond_uuid_log(void) |
1358 | { | |
c70636a7 | 1359 | char uuid_str[LTTNG_UUID_STR_LEN]; |
52a0e931 JG |
1360 | |
1361 | lttng_uuid_to_str(sessiond_uuid, uuid_str); | |
1362 | DBG("Starting lttng-sessiond {%s}", uuid_str); | |
1363 | } | |
1364 | ||
fac6795d DG |
1365 | /* |
1366 | * main | |
1367 | */ | |
1368 | int main(int argc, char **argv) | |
1369 | { | |
4a15001e | 1370 | int ret = 0, retval = 0; |
e6142f2e | 1371 | const char *env_app_timeout; |
b3530820 JG |
1372 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
1373 | *ust64_channel_monitor_pipe = NULL, | |
1374 | *kernel_channel_monitor_pipe = NULL; | |
a3707772 | 1375 | struct lttng_thread *ht_cleanup_thread = NULL; |
bc26e826 | 1376 | struct timer_thread_parameters timer_thread_parameters; |
64d9b072 JG |
1377 | /* Rotation thread handle. */ |
1378 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
1379 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
1380 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
917a718d | 1381 | struct lttng_thread *client_thread = NULL; |
4a91420c | 1382 | struct lttng_thread *notification_thread = NULL; |
bd9addf7 | 1383 | struct lttng_thread *register_apps_thread = NULL; |
fac6795d | 1384 | |
f5fb86c1 | 1385 | logger_set_thread_name("Main", false); |
335a95b7 MD |
1386 | init_kernel_workarounds(); |
1387 | ||
f6a9efaa DG |
1388 | rcu_register_thread(); |
1389 | ||
4a15001e MD |
1390 | if (set_signal_handler()) { |
1391 | retval = -1; | |
1392 | goto exit_set_signal_handler; | |
0bb7724a DG |
1393 | } |
1394 | ||
92816cc3 | 1395 | if (timer_signal_init()) { |
d086f507 JD |
1396 | retval = -1; |
1397 | goto exit_set_signal_handler; | |
1398 | } | |
1399 | ||
12744796 DG |
1400 | page_size = sysconf(_SC_PAGESIZE); |
1401 | if (page_size < 0) { | |
1402 | PERROR("sysconf _SC_PAGESIZE"); | |
1403 | page_size = LONG_MAX; | |
1404 | WARN("Fallback page size to %ld", page_size); | |
1405 | } | |
1406 | ||
e6142f2e JG |
1407 | ret = sessiond_config_init(&config); |
1408 | if (ret) { | |
1409 | retval = -1; | |
1410 | goto exit_set_signal_handler; | |
1411 | } | |
1412 | ||
2788b494 JR |
1413 | /* |
1414 | * Init config from environment variables. | |
1415 | * Command line option override env configuration per-doc. Do env first. | |
1416 | */ | |
1417 | sessiond_config_apply_env_config(&config); | |
1418 | ||
4a15001e MD |
1419 | /* |
1420 | * Parse arguments and load the daemon configuration file. | |
1421 | * | |
1422 | * We have an exit_options exit path to free memory reserved by | |
1423 | * set_options. This is needed because the rest of sessiond_cleanup() | |
1424 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
1425 | * depends on set_options. | |
1426 | */ | |
fac6795d | 1427 | progname = argv[0]; |
4a15001e MD |
1428 | if (set_options(argc, argv)) { |
1429 | retval = -1; | |
1430 | goto exit_options; | |
fac6795d DG |
1431 | } |
1432 | ||
e6142f2e JG |
1433 | /* |
1434 | * Resolve all paths received as arguments, configuration option, or | |
1435 | * through environment variable as absolute paths. This is necessary | |
1436 | * since daemonizing causes the sessiond's current working directory | |
1437 | * to '/'. | |
1438 | */ | |
1439 | ret = sessiond_config_resolve_paths(&config); | |
1440 | if (ret) { | |
1441 | goto exit_options; | |
1442 | } | |
1443 | ||
1444 | /* Apply config. */ | |
1445 | lttng_opt_verbose = config.verbose; | |
1446 | lttng_opt_quiet = config.quiet; | |
1447 | kconsumer_data.err_unix_sock_path = | |
1448 | config.kconsumerd_err_unix_sock_path.value; | |
1449 | kconsumer_data.cmd_unix_sock_path = | |
1450 | config.kconsumerd_cmd_unix_sock_path.value; | |
1451 | ustconsumer32_data.err_unix_sock_path = | |
1452 | config.consumerd32_err_unix_sock_path.value; | |
1453 | ustconsumer32_data.cmd_unix_sock_path = | |
1454 | config.consumerd32_cmd_unix_sock_path.value; | |
1455 | ustconsumer64_data.err_unix_sock_path = | |
1456 | config.consumerd64_err_unix_sock_path.value; | |
1457 | ustconsumer64_data.cmd_unix_sock_path = | |
1458 | config.consumerd64_cmd_unix_sock_path.value; | |
1459 | set_clock_plugin_env(); | |
1460 | ||
1461 | sessiond_config_log(&config); | |
52a0e931 | 1462 | sessiond_uuid_log(); |
e6142f2e | 1463 | |
a3bc3918 JR |
1464 | if (opt_print_version) { |
1465 | print_version(); | |
1466 | retval = 0; | |
1467 | goto exit_options; | |
1468 | } | |
1469 | ||
f472090a JG |
1470 | if (create_lttng_rundir()) { |
1471 | retval = -1; | |
1472 | goto exit_options; | |
1473 | } | |
1474 | ||
1475 | /* Abort launch if a session daemon is already running. */ | |
1476 | if (check_existing_daemon()) { | |
1477 | ERR("A session daemon is already running."); | |
1478 | retval = -1; | |
1479 | goto exit_options; | |
1480 | } | |
1481 | ||
fac6795d | 1482 | /* Daemonize */ |
e6142f2e | 1483 | if (config.daemonize || config.background) { |
ceed52b5 MD |
1484 | int i; |
1485 | ||
72dd7491 | 1486 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 1487 | !config.background); |
53094c05 | 1488 | if (ret < 0) { |
4a15001e MD |
1489 | retval = -1; |
1490 | goto exit_options; | |
53094c05 | 1491 | } |
0bb7724a | 1492 | |
ceed52b5 | 1493 | /* |
0bb7724a | 1494 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 1495 | * closed, in case we are called with more opened file |
f472090a | 1496 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
1497 | */ |
1498 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
1499 | if (i == lockfile_fd) { |
1500 | continue; | |
1501 | } | |
ceed52b5 MD |
1502 | (void) close(i); |
1503 | } | |
1504 | } | |
1505 | ||
929f71ec | 1506 | if (launch_run_as_worker(argv[0]) < 0) { |
7567352f MD |
1507 | goto exit_create_run_as_worker_cleanup; |
1508 | } | |
1509 | ||
4a15001e MD |
1510 | /* |
1511 | * Starting from here, we can create threads. This needs to be after | |
1512 | * lttng_daemonize due to RCU. | |
1513 | */ | |
1514 | ||
1515 | /* | |
1516 | * Initialize the health check subsystem. This call should set the | |
1517 | * appropriate time values. | |
1518 | */ | |
1519 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
1520 | if (!health_sessiond) { | |
1521 | PERROR("health_app_create error"); | |
1522 | retval = -1; | |
0d64e8fb | 1523 | goto stop_threads; |
4a15001e MD |
1524 | } |
1525 | ||
4a15001e | 1526 | /* Create thread to clean up RCU hash tables */ |
a3707772 JG |
1527 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
1528 | if (!ht_cleanup_thread) { | |
4a15001e | 1529 | retval = -1; |
0d64e8fb | 1530 | goto stop_threads; |
4a15001e MD |
1531 | } |
1532 | ||
ceed52b5 | 1533 | /* Create thread quit pipe */ |
a7333da7 | 1534 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e | 1535 | retval = -1; |
0d64e8fb | 1536 | goto stop_threads; |
fac6795d DG |
1537 | } |
1538 | ||
1539 | /* Check if daemon is UID = 0 */ | |
1540 | is_root = !getuid(); | |
fac6795d | 1541 | if (is_root) { |
67e40797 | 1542 | /* Create global run dir with root access */ |
67e40797 | 1543 | |
b3530820 JG |
1544 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
1545 | if (!kernel_channel_monitor_pipe) { | |
1546 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
1547 | retval = -1; | |
0d64e8fb | 1548 | goto stop_threads; |
b3530820 JG |
1549 | } |
1550 | kconsumer_data.channel_monitor_pipe = | |
1551 | lttng_pipe_release_writefd( | |
1552 | kernel_channel_monitor_pipe); | |
1553 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
1554 | retval = -1; | |
0d64e8fb | 1555 | goto stop_threads; |
b3530820 | 1556 | } |
fac6795d DG |
1557 | } |
1558 | ||
5c827ce0 DG |
1559 | /* Set consumer initial state */ |
1560 | kernel_consumerd_state = CONSUMER_STOPPED; | |
1561 | ust_consumerd_state = CONSUMER_STOPPED; | |
1562 | ||
b3530820 JG |
1563 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
1564 | if (!ust32_channel_monitor_pipe) { | |
1565 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
1566 | retval = -1; | |
0d64e8fb | 1567 | goto stop_threads; |
b3530820 JG |
1568 | } |
1569 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1570 | ust32_channel_monitor_pipe); | |
1571 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
1572 | retval = -1; | |
0d64e8fb | 1573 | goto stop_threads; |
b3530820 | 1574 | } |
62c43103 | 1575 | |
d086f507 | 1576 | /* |
92816cc3 JG |
1577 | * The rotation_thread_timer_queue structure is shared between the |
1578 | * sessiond timer thread and the rotation thread. The main thread keeps | |
1579 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 1580 | */ |
92816cc3 | 1581 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
1582 | if (!rotation_timer_queue) { |
1583 | retval = -1; | |
0d64e8fb | 1584 | goto stop_threads; |
d086f507 | 1585 | } |
bc26e826 JG |
1586 | timer_thread_parameters.rotation_thread_job_queue = |
1587 | rotation_timer_queue; | |
67e40797 | 1588 | |
b3530820 JG |
1589 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
1590 | if (!ust64_channel_monitor_pipe) { | |
1591 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
1592 | retval = -1; | |
0d64e8fb | 1593 | goto stop_threads; |
b3530820 JG |
1594 | } |
1595 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1596 | ust64_channel_monitor_pipe); | |
1597 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
1598 | retval = -1; | |
0d64e8fb | 1599 | goto stop_threads; |
b3530820 | 1600 | } |
847177cd | 1601 | |
1427f9b2 DG |
1602 | /* |
1603 | * Init UST app hash table. Alloc hash table before this point since | |
1604 | * cleanup() can get called after that point. | |
1605 | */ | |
4a15001e | 1606 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 1607 | ERR("Failed to allocate UST app hash table"); |
4a15001e | 1608 | retval = -1; |
0d64e8fb | 1609 | goto stop_threads; |
4a15001e | 1610 | } |
1427f9b2 | 1611 | |
90aa04a1 FD |
1612 | event_notifier_error_accounting_init(config.event_notifier_error_counter_bucket); |
1613 | ||
6a4e4039 JG |
1614 | /* |
1615 | * Initialize agent app hash table. We allocate the hash table here | |
1616 | * since cleanup() can get called after this point. | |
1617 | */ | |
1618 | if (agent_app_ht_alloc()) { | |
1619 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e | 1620 | retval = -1; |
0d64e8fb | 1621 | goto stop_threads; |
f20baf8e DG |
1622 | } |
1623 | ||
44760c20 JR |
1624 | if (agent_by_event_notifier_domain_ht_create()) { |
1625 | ERR("Failed to allocate per-event notifier domain agent hash table"); | |
1626 | retval = -1; | |
1627 | goto stop_threads; | |
1628 | } | |
a88df331 DG |
1629 | /* |
1630 | * These actions must be executed as root. We do that *after* setting up | |
1631 | * the sockets path because we MUST make the check for another daemon using | |
1632 | * those paths *before* trying to set the kernel consumer sockets and init | |
1633 | * kernel tracer. | |
1634 | */ | |
1635 | if (is_root) { | |
e6142f2e | 1636 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e | 1637 | retval = -1; |
0d64e8fb | 1638 | goto stop_threads; |
7753dea8 MD |
1639 | } |
1640 | ||
a88df331 | 1641 | /* Setup kernel tracer */ |
e6142f2e | 1642 | if (!config.no_kernel) { |
4fba7219 DG |
1643 | init_kernel_tracer(); |
1644 | } | |
a88df331 DG |
1645 | |
1646 | /* Set ulimit for open files */ | |
1647 | set_ulimit(); | |
fac6795d | 1648 | } |
4063050c MD |
1649 | /* init lttng_fd tracking must be done after set_ulimit. */ |
1650 | lttng_fd_init(); | |
fac6795d | 1651 | |
e6142f2e | 1652 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e | 1653 | retval = -1; |
0d64e8fb | 1654 | goto stop_threads; |
67e40797 DG |
1655 | } |
1656 | ||
e6142f2e | 1657 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e | 1658 | retval = -1; |
0d64e8fb | 1659 | goto stop_threads; |
67e40797 DG |
1660 | } |
1661 | ||
5b8719f5 | 1662 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 1663 | if (config.sig_parent) { |
5b8719f5 DG |
1664 | ppid = getppid(); |
1665 | } | |
1666 | ||
7a485870 | 1667 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 1668 | if (is_root && !config.no_kernel) { |
4a15001e MD |
1669 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
1670 | retval = -1; | |
0d64e8fb | 1671 | goto stop_threads; |
6620da75 | 1672 | } |
7a485870 DG |
1673 | } |
1674 | ||
099e26bd | 1675 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
1676 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
1677 | retval = -1; | |
0d64e8fb | 1678 | goto stop_threads; |
099e26bd DG |
1679 | } |
1680 | ||
d0b96690 | 1681 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
1682 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
1683 | retval = -1; | |
0d64e8fb | 1684 | goto stop_threads; |
d0b96690 DG |
1685 | } |
1686 | ||
7972aab2 DG |
1687 | /* Initialize global buffer per UID and PID registry. */ |
1688 | buffer_reg_init_uid_registry(); | |
1689 | buffer_reg_init_pid_registry(); | |
1690 | ||
099e26bd | 1691 | /* Init UST command queue. */ |
8bdee6e2 | 1692 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1693 | |
2f77fc4b | 1694 | cmd_init(); |
00e2e675 | 1695 | |
ae9e45b3 DG |
1696 | /* Check for the application socket timeout env variable. */ |
1697 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
1698 | if (env_app_timeout) { | |
e6142f2e | 1699 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 1700 | } else { |
e6142f2e | 1701 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
1702 | } |
1703 | ||
4a15001e MD |
1704 | ret = write_pidfile(); |
1705 | if (ret) { | |
1706 | ERR("Error in write_pidfile"); | |
1707 | retval = -1; | |
0d64e8fb | 1708 | goto stop_threads; |
4a15001e | 1709 | } |
35f90c40 | 1710 | |
554831e7 MD |
1711 | /* Initialize communication library */ |
1712 | lttcomm_init(); | |
4a15001e | 1713 | /* Initialize TCP timeout values */ |
d831c249 | 1714 | lttcomm_inet_init(); |
554831e7 | 1715 | |
12b4fb37 | 1716 | /* Create health-check thread. */ |
173fca4f | 1717 | if (!launch_health_management_thread()) { |
4a15001e | 1718 | retval = -1; |
0d64e8fb | 1719 | goto stop_threads; |
44a5e5eb DG |
1720 | } |
1721 | ||
b3530820 JG |
1722 | /* notification_thread_data acquires the pipes' read side. */ |
1723 | notification_thread_handle = notification_thread_handle_create( | |
1724 | ust32_channel_monitor_pipe, | |
1725 | ust64_channel_monitor_pipe, | |
c8a9de5a | 1726 | kernel_channel_monitor_pipe); |
b3530820 JG |
1727 | if (!notification_thread_handle) { |
1728 | retval = -1; | |
1729 | ERR("Failed to create notification thread shared data"); | |
0d64e8fb | 1730 | goto stop_threads; |
b3530820 JG |
1731 | } |
1732 | ||
1733 | /* Create notification thread. */ | |
4a91420c JG |
1734 | notification_thread = launch_notification_thread( |
1735 | notification_thread_handle); | |
1736 | if (!notification_thread) { | |
b3530820 | 1737 | retval = -1; |
0d64e8fb | 1738 | goto stop_threads; |
b3530820 JG |
1739 | } |
1740 | ||
d086f507 | 1741 | /* Create timer thread. */ |
bc26e826 | 1742 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 1743 | retval = -1; |
0d64e8fb | 1744 | goto stop_threads; |
d086f507 | 1745 | } |
d086f507 | 1746 | |
db66e574 JD |
1747 | /* rotation_thread_data acquires the pipes' read side. */ |
1748 | rotation_thread_handle = rotation_thread_handle_create( | |
90936dcf | 1749 | rotation_timer_queue, |
c8a9de5a | 1750 | notification_thread_handle); |
db66e574 JD |
1751 | if (!rotation_thread_handle) { |
1752 | retval = -1; | |
1753 | ERR("Failed to create rotation thread shared data"); | |
1754 | stop_threads(); | |
0d64e8fb | 1755 | goto stop_threads; |
db66e574 | 1756 | } |
db66e574 JD |
1757 | |
1758 | /* Create rotation thread. */ | |
64d9b072 | 1759 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 1760 | retval = -1; |
0d64e8fb | 1761 | goto stop_threads; |
db66e574 JD |
1762 | } |
1763 | ||
cf3af59e | 1764 | /* Create thread to manage the client socket */ |
917a718d JG |
1765 | client_thread = launch_client_thread(); |
1766 | if (!client_thread) { | |
4a15001e | 1767 | retval = -1; |
0d64e8fb | 1768 | goto stop_threads; |
cf3af59e | 1769 | } |
fac6795d | 1770 | |
308df7bb JG |
1771 | /* Set credentials of the client socket and rundir */ |
1772 | if (is_root && set_permissions(config.rundir.value)) { | |
1773 | retval = -1; | |
1774 | goto stop_threads; | |
1775 | } | |
1776 | ||
5d1b0219 JG |
1777 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], |
1778 | apps_cmd_notify_pipe[1])) { | |
4a15001e | 1779 | retval = -1; |
0d64e8fb | 1780 | goto stop_threads; |
099e26bd DG |
1781 | } |
1782 | ||
1783 | /* Create thread to manage application registration. */ | |
bd9addf7 JG |
1784 | register_apps_thread = launch_application_registration_thread( |
1785 | &ust_cmd_queue); | |
1786 | if (!register_apps_thread) { | |
4a15001e | 1787 | retval = -1; |
0d64e8fb | 1788 | goto stop_threads; |
099e26bd DG |
1789 | } |
1790 | ||
cf3af59e | 1791 | /* Create thread to manage application socket */ |
7649924e | 1792 | if (!launch_application_management_thread(apps_cmd_pipe[0])) { |
4a15001e | 1793 | retval = -1; |
0d64e8fb | 1794 | goto stop_threads; |
d0b96690 DG |
1795 | } |
1796 | ||
1797 | /* Create thread to manage application notify socket */ | |
971a61c6 | 1798 | if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) { |
4a15001e | 1799 | retval = -1; |
0d64e8fb | 1800 | goto stop_threads; |
cf3af59e | 1801 | } |
fac6795d | 1802 | |
8a7e4590 JG |
1803 | /* Create agent management thread. */ |
1804 | if (!launch_agent_management_thread()) { | |
4a15001e | 1805 | retval = -1; |
0d64e8fb | 1806 | goto stop_threads; |
4d076222 DG |
1807 | } |
1808 | ||
6620da75 | 1809 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 1810 | if (is_root && !config.no_kernel) { |
6620da75 | 1811 | /* Create kernel thread to manage kernel event */ |
5b093681 | 1812 | if (!launch_kernel_management_thread(kernel_poll_pipe[0])) { |
4a15001e | 1813 | retval = -1; |
0d64e8fb | 1814 | goto stop_threads; |
6620da75 | 1815 | } |
352b58f5 JR |
1816 | |
1817 | if (kernel_get_notification_fd() >= 0) { | |
1818 | ret = notification_thread_command_add_tracer_event_source( | |
1819 | notification_thread_handle, | |
1820 | kernel_get_notification_fd(), | |
1821 | LTTNG_DOMAIN_KERNEL); | |
1822 | if (ret != LTTNG_OK) { | |
1823 | ERR("Failed to add kernel trigger event source to notification thread"); | |
1824 | retval = -1; | |
1825 | goto stop_threads; | |
1826 | } | |
1827 | } | |
ef367a93 | 1828 | } |
7a485870 | 1829 | |
3316b9d6 JG |
1830 | /* Load sessions. */ |
1831 | ret = config_load_session(config.load_session_path.value, | |
1832 | NULL, 1, 1, NULL); | |
4a15001e | 1833 | if (ret) { |
3316b9d6 | 1834 | ERR("Session load failed: %s", error_get_str(ret)); |
4a15001e | 1835 | retval = -1; |
0d64e8fb | 1836 | goto stop_threads; |
4a15001e MD |
1837 | } |
1838 | ||
3316b9d6 JG |
1839 | /* Initialization completed. */ |
1840 | sessiond_signal_parents(); | |
1841 | ||
4a15001e MD |
1842 | /* |
1843 | * This is where we start awaiting program completion (e.g. through | |
1844 | * signal that asks threads to teardown). | |
1845 | */ | |
1846 | ||
99d688f2 | 1847 | /* Initiate teardown once activity occurs on the quit pipe. */ |
2d54bfb6 | 1848 | sessiond_wait_for_quit_pipe(-1); |
917a718d | 1849 | |
0d64e8fb | 1850 | stop_threads: |
90aa04a1 | 1851 | |
917a718d JG |
1852 | /* |
1853 | * Ensure that the client thread is no longer accepting new commands, | |
1854 | * which could cause new sessions to be created. | |
1855 | */ | |
0d64e8fb JG |
1856 | if (client_thread) { |
1857 | lttng_thread_shutdown(client_thread); | |
917a718d | 1858 | lttng_thread_put(client_thread); |
917a718d JG |
1859 | } |
1860 | ||
99d688f2 | 1861 | destroy_all_sessions_and_wait(); |
0d64e8fb | 1862 | |
b69a1b40 JG |
1863 | /* |
1864 | * At this point no new trigger can be registered (no sessions are | |
1865 | * running/rotating) and clients can't connect to the session daemon | |
1866 | * anymore. Unregister all triggers. | |
1867 | */ | |
1868 | unregister_all_triggers(); | |
1869 | ||
bd9addf7 JG |
1870 | if (register_apps_thread) { |
1871 | lttng_thread_shutdown(register_apps_thread); | |
1872 | lttng_thread_put(register_apps_thread); | |
1873 | } | |
a3707772 | 1874 | lttng_thread_list_shutdown_orphans(); |
917a718d | 1875 | |
4d62fbf8 MD |
1876 | /* |
1877 | * Wait for all pending call_rcu work to complete before tearing | |
1878 | * down data structures. call_rcu worker may be trying to | |
1879 | * perform lookups in those structures. | |
1880 | */ | |
1881 | rcu_barrier(); | |
4a15001e MD |
1882 | /* |
1883 | * sessiond_cleanup() is called when no other thread is running, except | |
1884 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
1885 | */ | |
1886 | rcu_thread_online(); | |
1887 | sessiond_cleanup(); | |
06f525de | 1888 | |
3b8a092f FD |
1889 | /* |
1890 | * Wait for all pending call_rcu work to complete tearing shutting down | |
1891 | * the notification thread. This call_rcu work includes shutting down | |
1892 | * UST apps and event notifier pipes. | |
1893 | */ | |
1894 | rcu_barrier(); | |
1895 | ||
4a91420c JG |
1896 | if (notification_thread) { |
1897 | lttng_thread_shutdown(notification_thread); | |
1898 | lttng_thread_put(notification_thread); | |
1899 | } | |
1900 | ||
90aa04a1 FD |
1901 | /* |
1902 | * Teardown of error accounting needs be done after the teardown of the | |
1903 | * notification thread as all error buckets must have been released by | |
1904 | * their users (conditions). | |
1905 | */ | |
1906 | event_notifier_error_accounting_fini(); | |
1907 | ||
c4d5de9d JG |
1908 | /* |
1909 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
1910 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
1911 | * the queue is empty before shutting down the clean-up thread. | |
1912 | */ | |
1913 | rcu_barrier(); | |
1914 | ||
a3707772 JG |
1915 | if (ht_cleanup_thread) { |
1916 | lttng_thread_shutdown(ht_cleanup_thread); | |
1917 | lttng_thread_put(ht_cleanup_thread); | |
1918 | } | |
1919 | ||
64d9b072 JG |
1920 | rcu_thread_offline(); |
1921 | rcu_unregister_thread(); | |
1922 | ||
1923 | if (rotation_thread_handle) { | |
1924 | rotation_thread_handle_destroy(rotation_thread_handle); | |
1925 | } | |
1926 | ||
d086f507 JD |
1927 | /* |
1928 | * After the rotation and timer thread have quit, we can safely destroy | |
1929 | * the rotation_timer_queue. | |
1930 | */ | |
92816cc3 | 1931 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
c8a9de5a JG |
1932 | /* |
1933 | * The teardown of the notification system is performed after the | |
1934 | * session daemon's teardown in order to allow it to be notified | |
1935 | * of the active session and channels at the moment of the teardown. | |
1936 | */ | |
1937 | if (notification_thread_handle) { | |
1938 | notification_thread_handle_destroy(notification_thread_handle); | |
1939 | } | |
b3530820 JG |
1940 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
1941 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
1942 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
4a15001e | 1943 | |
9bc2ec5f JR |
1944 | if (health_sessiond) { |
1945 | health_app_destroy(health_sessiond); | |
1946 | } | |
7567352f | 1947 | exit_create_run_as_worker_cleanup: |
4a15001e | 1948 | exit_options: |
f472090a | 1949 | sessiond_cleanup_lock_file(); |
4a15001e MD |
1950 | sessiond_cleanup_options(); |
1951 | ||
1952 | exit_set_signal_handler: | |
1953 | if (!retval) { | |
cf3af59e | 1954 | exit(EXIT_SUCCESS); |
4a15001e MD |
1955 | } else { |
1956 | exit(EXIT_FAILURE); | |
67e40797 | 1957 | } |
fac6795d | 1958 | } |