Commit | Line | Data |
---|---|---|
826d496d MD |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
0fdd1e2c | 3 | * Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
26296c48 | 4 | * 2013 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
fac6795d | 5 | * |
d14d33bf AM |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License, version 2 only, | |
8 | * as published by the Free Software Foundation. | |
91d76f53 | 9 | * |
d14d33bf AM |
10 | * This program is distributed in the hope that it will be useful, |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
91d76f53 | 14 | * |
d14d33bf AM |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program; if not, write to the Free Software Foundation, Inc., | |
17 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
18 | */ |
19 | ||
6c1c0768 | 20 | #define _LGPL_SOURCE |
fac6795d DG |
21 | #include <getopt.h> |
22 | #include <grp.h> | |
23 | #include <limits.h> | |
0bb7724a | 24 | #include <paths.h> |
fac6795d DG |
25 | #include <pthread.h> |
26 | #include <signal.h> | |
27 | #include <stdio.h> | |
28 | #include <stdlib.h> | |
29 | #include <string.h> | |
331744e3 | 30 | #include <inttypes.h> |
0fdd1e2c | 31 | #include <sys/mman.h> |
b73401da | 32 | #include <sys/mount.h> |
1e307fab | 33 | #include <sys/resource.h> |
fac6795d DG |
34 | #include <sys/socket.h> |
35 | #include <sys/stat.h> | |
36 | #include <sys/types.h> | |
0fdd1e2c | 37 | #include <sys/wait.h> |
5c827ce0 | 38 | #include <urcu/uatomic.h> |
fac6795d | 39 | #include <unistd.h> |
4f0b90ee | 40 | #include <ctype.h> |
fac6795d | 41 | |
990570ed | 42 | #include <common/common.h> |
d27c42b8 | 43 | #include <common/compat/socket.h> |
e8fa9fb0 | 44 | #include <common/compat/getenv.h> |
db758600 DG |
45 | #include <common/defaults.h> |
46 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 47 | #include <common/futex.h> |
00e2e675 | 48 | #include <common/relayd/relayd.h> |
81b86775 | 49 | #include <common/utils.h> |
3ccdf997 | 50 | #include <common/daemonize.h> |
f40ef1d5 | 51 | #include <common/config/session-config.h> |
dcabc190 | 52 | #include <common/dynamic-buffer.h> |
76fcf151 | 53 | #include <lttng/event-internal.h> |
fac6795d | 54 | |
10a8a223 | 55 | #include "lttng-sessiond.h" |
7972aab2 | 56 | #include "buffer-registry.h" |
54d01ffb | 57 | #include "channel.h" |
2f77fc4b | 58 | #include "cmd.h" |
00e2e675 | 59 | #include "consumer.h" |
099e26bd | 60 | #include "context.h" |
54d01ffb | 61 | #include "event.h" |
4771f025 | 62 | #include "kernel.h" |
f1e16794 | 63 | #include "kernel-consumer.h" |
096102bd | 64 | #include "modprobe.h" |
0fdd1e2c | 65 | #include "shm.h" |
1e307fab | 66 | #include "ust-ctl.h" |
00e2e675 | 67 | #include "ust-consumer.h" |
8e68d1c8 | 68 | #include "utils.h" |
4063050c | 69 | #include "fd-limit.h" |
8782cc74 | 70 | #include "health-sessiond.h" |
8ac94142 | 71 | #include "testpoint.h" |
f9d2ba6a | 72 | #include "notify-apps.h" |
022d91ba | 73 | #include "agent-thread.h" |
fb198a11 | 74 | #include "save.h" |
b3530820 JG |
75 | #include "notification-thread.h" |
76 | #include "notification-thread-commands.h" | |
db66e574 | 77 | #include "rotation-thread.h" |
0dbc2034 | 78 | #include "lttng-syscall.h" |
7c1d2758 | 79 | #include "agent.h" |
5e97de00 | 80 | #include "ht-cleanup.h" |
e6142f2e | 81 | #include "sessiond-config.h" |
8e319828 | 82 | #include "timer.h" |
a3707772 | 83 | #include "thread.h" |
917a718d | 84 | #include "client.h" |
5d1b0219 | 85 | #include "dispatch.h" |
1785d7f2 | 86 | #include "register.h" |
7649924e | 87 | #include "manage-apps.h" |
5b093681 | 88 | #include "manage-kernel.h" |
ebaeda94 | 89 | |
4fc83d94 PP |
90 | static const char *help_msg = |
91 | #ifdef LTTNG_EMBED_HELP | |
92 | #include <lttng-sessiond.8.h> | |
93 | #else | |
94 | NULL | |
95 | #endif | |
96 | ; | |
97 | ||
fac6795d | 98 | const char *progname; |
c9cb3e7d | 99 | static int lockfile_fd = -1; |
3bd1e081 | 100 | |
0bb7724a DG |
101 | /* Set to 1 when a SIGUSR1 signal is received. */ |
102 | static int recv_child_signal; | |
103 | ||
26296c48 JG |
104 | /* Command line options */ |
105 | static const struct option long_options[] = { | |
0f5ea17c JG |
106 | { "client-sock", required_argument, 0, 'c' }, |
107 | { "apps-sock", required_argument, 0, 'a' }, | |
108 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
109 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
110 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
111 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
112 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
113 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
114 | { "consumerd32-path", required_argument, 0, '\0' }, | |
115 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
116 | { "consumerd64-path", required_argument, 0, '\0' }, | |
117 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
118 | { "daemonize", no_argument, 0, 'd' }, | |
119 | { "background", no_argument, 0, 'b' }, | |
120 | { "sig-parent", no_argument, 0, 'S' }, | |
121 | { "help", no_argument, 0, 'h' }, | |
122 | { "group", required_argument, 0, 'g' }, | |
123 | { "version", no_argument, 0, 'V' }, | |
124 | { "quiet", no_argument, 0, 'q' }, | |
125 | { "verbose", no_argument, 0, 'v' }, | |
126 | { "verbose-consumer", no_argument, 0, '\0' }, | |
127 | { "no-kernel", no_argument, 0, '\0' }, | |
128 | { "pidfile", required_argument, 0, 'p' }, | |
129 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
130 | { "config", required_argument, 0, 'f' }, | |
131 | { "load", required_argument, 0, 'l' }, | |
132 | { "kmod-probes", required_argument, 0, '\0' }, | |
133 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
134 | { NULL, 0, 0, 0 } |
135 | }; | |
136 | ||
137 | /* Command line options to ignore from configuration file */ | |
138 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
1d4b027a | 139 | |
099e26bd DG |
140 | /* |
141 | * This pipe is used to inform the thread managing application communication | |
142 | * that a command is queued and ready to be processed. | |
143 | */ | |
76d7553f | 144 | static int apps_cmd_pipe[2] = { -1, -1 }; |
971a61c6 | 145 | static int apps_cmd_notify_pipe[2] = { -1, -1 }; |
099e26bd | 146 | |
099e26bd DG |
147 | /* |
148 | * UST registration command queue. This queue is tied with a futex and uses a N | |
149 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
150 | * | |
b22c5da8 DG |
151 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
152 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
153 | * the line new application socket and monitors it for any I/O error or clean | |
154 | * close that triggers an unregistration of the application. | |
099e26bd DG |
155 | */ |
156 | static struct ust_cmd_queue ust_cmd_queue; | |
157 | ||
2f77fc4b DG |
158 | static const char *module_proc_lttng = "/proc/lttng"; |
159 | ||
97bc1426 | 160 | /* |
a7333da7 | 161 | * Section name to look for in the daemon configuration file. |
97bc1426 | 162 | */ |
a7333da7 | 163 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 164 | |
a7333da7 JG |
165 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
166 | static int is_root; | |
5eb91c98 | 167 | |
099e26bd DG |
168 | /* |
169 | * Stop all threads by closing the thread quit pipe. | |
170 | */ | |
cf3af59e MD |
171 | static void stop_threads(void) |
172 | { | |
5eb91c98 DG |
173 | int ret; |
174 | ||
cf3af59e MD |
175 | /* Stopping all threads */ |
176 | DBG("Terminating all threads"); | |
a7333da7 | 177 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
178 | if (ret < 0) { |
179 | ERR("write error on thread quit pipe"); | |
180 | } | |
cf3af59e MD |
181 | } |
182 | ||
e975f9f8 DG |
183 | /* |
184 | * Close every consumer sockets. | |
185 | */ | |
186 | static void close_consumer_sockets(void) | |
187 | { | |
188 | int ret; | |
189 | ||
190 | if (kconsumer_data.err_sock >= 0) { | |
191 | ret = close(kconsumer_data.err_sock); | |
192 | if (ret < 0) { | |
193 | PERROR("kernel consumer err_sock close"); | |
194 | } | |
195 | } | |
196 | if (ustconsumer32_data.err_sock >= 0) { | |
197 | ret = close(ustconsumer32_data.err_sock); | |
198 | if (ret < 0) { | |
a76cbd9f | 199 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
200 | } |
201 | } | |
202 | if (ustconsumer64_data.err_sock >= 0) { | |
203 | ret = close(ustconsumer64_data.err_sock); | |
204 | if (ret < 0) { | |
a76cbd9f | 205 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
206 | } |
207 | } | |
208 | if (kconsumer_data.cmd_sock >= 0) { | |
209 | ret = close(kconsumer_data.cmd_sock); | |
210 | if (ret < 0) { | |
211 | PERROR("kernel consumer cmd_sock close"); | |
212 | } | |
213 | } | |
214 | if (ustconsumer32_data.cmd_sock >= 0) { | |
215 | ret = close(ustconsumer32_data.cmd_sock); | |
216 | if (ret < 0) { | |
a76cbd9f | 217 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
218 | } |
219 | } | |
220 | if (ustconsumer64_data.cmd_sock >= 0) { | |
221 | ret = close(ustconsumer64_data.cmd_sock); | |
222 | if (ret < 0) { | |
a76cbd9f | 223 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
224 | } |
225 | } | |
b3530820 JG |
226 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
227 | ret = close(kconsumer_data.channel_monitor_pipe); | |
228 | if (ret < 0) { | |
229 | PERROR("kernel consumer channel monitor pipe close"); | |
230 | } | |
231 | } | |
232 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
233 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
234 | if (ret < 0) { | |
235 | PERROR("UST consumerd32 channel monitor pipe close"); | |
236 | } | |
237 | } | |
238 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
239 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
240 | if (ret < 0) { | |
241 | PERROR("UST consumerd64 channel monitor pipe close"); | |
242 | } | |
243 | } | |
e975f9f8 DG |
244 | } |
245 | ||
4e4714cb JR |
246 | /* |
247 | * Wait on consumer process termination. | |
248 | * | |
249 | * Need to be called with the consumer data lock held or from a context | |
250 | * ensuring no concurrent access to data (e.g: cleanup). | |
251 | */ | |
252 | static void wait_consumer(struct consumer_data *consumer_data) | |
253 | { | |
254 | pid_t ret; | |
255 | int status; | |
256 | ||
257 | if (consumer_data->pid <= 0) { | |
258 | return; | |
259 | } | |
260 | ||
261 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
262 | consumer_data->pid); | |
263 | ret = waitpid(consumer_data->pid, &status, 0); | |
264 | if (ret == -1) { | |
265 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 266 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
267 | ERR("consumerd termination with error: %d", |
268 | WEXITSTATUS(ret)); | |
269 | } | |
270 | consumer_data->pid = 0; | |
271 | } | |
272 | ||
fac6795d | 273 | /* |
4a15001e | 274 | * Cleanup the session daemon's data structures. |
fac6795d | 275 | */ |
4a15001e | 276 | static void sessiond_cleanup(void) |
fac6795d | 277 | { |
ef599319 | 278 | int ret; |
e32d7f27 | 279 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 280 | |
4a15001e | 281 | DBG("Cleanup sessiond"); |
e07ae692 | 282 | |
4e449f3f MD |
283 | /* |
284 | * Close the thread quit pipe. It has already done its job, | |
285 | * since we are now called. | |
286 | */ | |
a7333da7 | 287 | sessiond_close_quit_pipe(); |
971a61c6 JG |
288 | utils_close_pipe(apps_cmd_pipe); |
289 | utils_close_pipe(apps_cmd_notify_pipe); | |
5b093681 | 290 | utils_close_pipe(kernel_poll_pipe); |
2f77fc4b | 291 | |
c9a2957d JG |
292 | ret = remove(config.pid_file_path.value); |
293 | if (ret < 0) { | |
294 | PERROR("remove pidfile %s", config.pid_file_path.value); | |
35f90c40 DG |
295 | } |
296 | ||
e6142f2e JG |
297 | DBG("Removing sessiond and consumerd content of directory %s", |
298 | config.rundir.value); | |
8c6c56c2 MD |
299 | |
300 | /* sessiond */ | |
e6142f2e JG |
301 | DBG("Removing %s", config.pid_file_path.value); |
302 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 303 | |
e6142f2e JG |
304 | DBG("Removing %s", config.agent_port_file_path.value); |
305 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 306 | |
8c6c56c2 | 307 | /* kconsumerd */ |
e6142f2e JG |
308 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
309 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
310 | ||
311 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
312 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
313 | |
314 | /* ust consumerd 32 */ | |
e6142f2e JG |
315 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
316 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
317 | ||
318 | DBG("Removing directory %s", config.consumerd32_path.value); | |
319 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
320 | |
321 | /* ust consumerd 64 */ | |
e6142f2e JG |
322 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
323 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
324 | ||
325 | DBG("Removing directory %s", config.consumerd64_path.value); | |
326 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 327 | |
99d688f2 | 328 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 329 | |
4e4714cb JR |
330 | wait_consumer(&kconsumer_data); |
331 | wait_consumer(&ustconsumer64_data); | |
332 | wait_consumer(&ustconsumer32_data); | |
333 | ||
6a4e4039 JG |
334 | DBG("Cleaning up all agent apps"); |
335 | agent_app_ht_clean(); | |
336 | ||
099e26bd | 337 | DBG("Closing all UST sockets"); |
56fff090 | 338 | ust_app_clean_list(); |
7972aab2 | 339 | buffer_reg_destroy_registries(); |
099e26bd | 340 | |
e6142f2e | 341 | if (is_root && !config.no_kernel) { |
4fba7219 | 342 | DBG2("Closing kernel fd"); |
a4b35e07 | 343 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
344 | ret = close(kernel_tracer_fd); |
345 | if (ret) { | |
346 | PERROR("close"); | |
347 | } | |
a4b35e07 | 348 | } |
2f50c8a3 | 349 | DBG("Unloading kernel modules"); |
096102bd | 350 | modprobe_remove_lttng_all(); |
834978fd | 351 | free(syscall_table); |
2f50c8a3 | 352 | } |
2f77fc4b | 353 | |
e975f9f8 DG |
354 | close_consumer_sockets(); |
355 | ||
c9cb3e7d JG |
356 | /* |
357 | * We do NOT rmdir rundir because there are other processes | |
358 | * using it, for instance lttng-relayd, which can start in | |
359 | * parallel with this teardown. | |
360 | */ | |
4a15001e MD |
361 | } |
362 | ||
363 | /* | |
364 | * Cleanup the daemon's option data structures. | |
365 | */ | |
366 | static void sessiond_cleanup_options(void) | |
367 | { | |
368 | DBG("Cleaning up options"); | |
369 | ||
e6142f2e | 370 | sessiond_config_fini(&config); |
c9cb3e7d | 371 | |
7567352f | 372 | run_as_destroy_worker(); |
fac6795d DG |
373 | } |
374 | ||
b73401da | 375 | /* |
096102bd | 376 | * Setup necessary data for kernel tracer action. |
b73401da | 377 | */ |
096102bd | 378 | static int init_kernel_tracer(void) |
b73401da DG |
379 | { |
380 | int ret; | |
b73401da | 381 | |
096102bd DG |
382 | /* Modprobe lttng kernel modules */ |
383 | ret = modprobe_lttng_control(); | |
b73401da | 384 | if (ret < 0) { |
b73401da DG |
385 | goto error; |
386 | } | |
387 | ||
096102bd DG |
388 | /* Open debugfs lttng */ |
389 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
390 | if (kernel_tracer_fd < 0) { | |
391 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 392 | goto error_open; |
54d01ffb DG |
393 | } |
394 | ||
2f77fc4b | 395 | /* Validate kernel version */ |
88076e89 JD |
396 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
397 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
398 | if (ret < 0) { |
399 | goto error_version; | |
b551a063 | 400 | } |
54d01ffb | 401 | |
2f77fc4b DG |
402 | ret = modprobe_lttng_data(); |
403 | if (ret < 0) { | |
404 | goto error_modules; | |
54d01ffb DG |
405 | } |
406 | ||
6e21424e JR |
407 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
408 | kernel_tracer_fd); | |
409 | if (ret < 0) { | |
410 | goto error_modules; | |
411 | } | |
412 | ||
413 | if (ret < 1) { | |
414 | WARN("Kernel tracer does not support buffer monitoring. " | |
415 | "The monitoring timer of channels in the kernel domain " | |
416 | "will be set to 0 (disabled)."); | |
417 | } | |
418 | ||
2f77fc4b DG |
419 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
420 | return 0; | |
421 | ||
422 | error_version: | |
423 | modprobe_remove_lttng_control(); | |
424 | ret = close(kernel_tracer_fd); | |
425 | if (ret) { | |
426 | PERROR("close"); | |
b551a063 | 427 | } |
2f77fc4b | 428 | kernel_tracer_fd = -1; |
f73fabfd | 429 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 430 | |
2f77fc4b DG |
431 | error_modules: |
432 | ret = close(kernel_tracer_fd); | |
433 | if (ret) { | |
434 | PERROR("close"); | |
b551a063 | 435 | } |
54d01ffb | 436 | |
2f77fc4b DG |
437 | error_open: |
438 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
439 | |
440 | error: | |
2f77fc4b DG |
441 | WARN("No kernel tracer available"); |
442 | kernel_tracer_fd = -1; | |
443 | if (!is_root) { | |
f73fabfd | 444 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 445 | } else { |
f73fabfd | 446 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 447 | } |
54d01ffb DG |
448 | } |
449 | ||
917a718d | 450 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 451 | { |
917a718d | 452 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
453 | } |
454 | ||
00e2e675 | 455 | /* |
917a718d JG |
456 | * Take an option from the getopt output and set it in the right variable to be |
457 | * used later. | |
36b588ed | 458 | * |
917a718d | 459 | * Return 0 on success else a negative value. |
00e2e675 | 460 | */ |
917a718d | 461 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 462 | { |
917a718d | 463 | int ret = 0; |
fac6795d | 464 | |
c0232ea5 | 465 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
466 | if (!arg || *arg == '\0') { |
467 | ret = -EINVAL; | |
468 | goto end; | |
469 | } | |
e8fa9fb0 MD |
470 | if (lttng_is_setuid_setgid()) { |
471 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
472 | "-c, --client-sock"); | |
473 | } else { | |
e6142f2e JG |
474 | config_string_set(&config.client_unix_sock_path, |
475 | strdup(arg)); | |
476 | if (!config.client_unix_sock_path.value) { | |
477 | ret = -ENOMEM; | |
478 | PERROR("strdup"); | |
479 | } | |
e8fa9fb0 | 480 | } |
c0232ea5 | 481 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
482 | if (!arg || *arg == '\0') { |
483 | ret = -EINVAL; | |
484 | goto end; | |
485 | } | |
e8fa9fb0 MD |
486 | if (lttng_is_setuid_setgid()) { |
487 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
488 | "-a, --apps-sock"); | |
489 | } else { | |
e6142f2e JG |
490 | config_string_set(&config.apps_unix_sock_path, |
491 | strdup(arg)); | |
492 | if (!config.apps_unix_sock_path.value) { | |
493 | ret = -ENOMEM; | |
494 | PERROR("strdup"); | |
495 | } | |
e8fa9fb0 | 496 | } |
c0232ea5 | 497 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 498 | config.daemonize = true; |
c0232ea5 | 499 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 500 | config.background = true; |
c0232ea5 | 501 | } else if (string_match(optname, "group") || opt == 'g') { |
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 | "-g, --group"); | |
509 | } else { | |
e6142f2e JG |
510 | config_string_set(&config.tracing_group_name, |
511 | strdup(arg)); | |
512 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 513 | ret = -ENOMEM; |
e6142f2e | 514 | PERROR("strdup"); |
e8fa9fb0 | 515 | } |
db322c4d | 516 | } |
c0232ea5 | 517 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 518 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 519 | if (ret) { |
4fc83d94 | 520 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
521 | perror("exec"); |
522 | } | |
523 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 524 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
525 | fprintf(stdout, "%s\n", VERSION); |
526 | exit(EXIT_SUCCESS); | |
c0232ea5 | 527 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 528 | config.sig_parent = true; |
c0232ea5 | 529 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
530 | if (!arg || *arg == '\0') { |
531 | ret = -EINVAL; | |
532 | goto end; | |
533 | } | |
e8fa9fb0 MD |
534 | if (lttng_is_setuid_setgid()) { |
535 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
536 | "--kconsumerd-err-sock"); | |
537 | } else { | |
e6142f2e JG |
538 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
539 | strdup(arg)); | |
540 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
541 | ret = -ENOMEM; | |
542 | PERROR("strdup"); | |
543 | } | |
e8fa9fb0 | 544 | } |
c0232ea5 | 545 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
546 | if (!arg || *arg == '\0') { |
547 | ret = -EINVAL; | |
548 | goto end; | |
549 | } | |
e8fa9fb0 MD |
550 | if (lttng_is_setuid_setgid()) { |
551 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
552 | "--kconsumerd-cmd-sock"); | |
553 | } else { | |
e6142f2e JG |
554 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
555 | strdup(arg)); | |
556 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
557 | ret = -ENOMEM; | |
558 | PERROR("strdup"); | |
559 | } | |
e8fa9fb0 | 560 | } |
c0232ea5 | 561 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
562 | if (!arg || *arg == '\0') { |
563 | ret = -EINVAL; | |
564 | goto end; | |
565 | } | |
e8fa9fb0 MD |
566 | if (lttng_is_setuid_setgid()) { |
567 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
568 | "--ustconsumerd64-err-sock"); | |
569 | } else { | |
e6142f2e JG |
570 | config_string_set(&config.consumerd64_err_unix_sock_path, |
571 | strdup(arg)); | |
572 | if (!config.consumerd64_err_unix_sock_path.value) { | |
573 | ret = -ENOMEM; | |
574 | PERROR("strdup"); | |
575 | } | |
e8fa9fb0 | 576 | } |
c0232ea5 | 577 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
578 | if (!arg || *arg == '\0') { |
579 | ret = -EINVAL; | |
580 | goto end; | |
581 | } | |
e8fa9fb0 MD |
582 | if (lttng_is_setuid_setgid()) { |
583 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
584 | "--ustconsumerd64-cmd-sock"); | |
585 | } else { | |
e6142f2e JG |
586 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
587 | strdup(arg)); | |
588 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
589 | ret = -ENOMEM; | |
590 | PERROR("strdup"); | |
591 | } | |
e8fa9fb0 | 592 | } |
c0232ea5 | 593 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
594 | if (!arg || *arg == '\0') { |
595 | ret = -EINVAL; | |
596 | goto end; | |
597 | } | |
e8fa9fb0 MD |
598 | if (lttng_is_setuid_setgid()) { |
599 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
600 | "--ustconsumerd32-err-sock"); | |
601 | } else { | |
e6142f2e JG |
602 | config_string_set(&config.consumerd32_err_unix_sock_path, |
603 | strdup(arg)); | |
604 | if (!config.consumerd32_err_unix_sock_path.value) { | |
605 | ret = -ENOMEM; | |
606 | PERROR("strdup"); | |
607 | } | |
e8fa9fb0 | 608 | } |
c0232ea5 | 609 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
610 | if (!arg || *arg == '\0') { |
611 | ret = -EINVAL; | |
612 | goto end; | |
613 | } | |
e8fa9fb0 MD |
614 | if (lttng_is_setuid_setgid()) { |
615 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
616 | "--ustconsumerd32-cmd-sock"); | |
617 | } else { | |
e6142f2e JG |
618 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
619 | strdup(arg)); | |
620 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
621 | ret = -ENOMEM; | |
622 | PERROR("strdup"); | |
623 | } | |
e8fa9fb0 | 624 | } |
c0232ea5 | 625 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 626 | config.no_kernel = true; |
c0232ea5 | 627 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 628 | config.quiet = true; |
c0232ea5 | 629 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
630 | /* Verbose level can increase using multiple -v */ |
631 | if (arg) { | |
13755a18 | 632 | /* Value obtained from config file */ |
e6142f2e | 633 | config.verbose = config_parse_value(arg); |
26296c48 | 634 | } else { |
13755a18 | 635 | /* -v used on command line */ |
e6142f2e | 636 | config.verbose++; |
26296c48 | 637 | } |
13755a18 | 638 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
639 | config.verbose = config.verbose < 0 ? 0 : |
640 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 641 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 642 | if (arg) { |
e6142f2e | 643 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 644 | } else { |
e6142f2e | 645 | config.verbose_consumer++; |
26296c48 | 646 | } |
c0232ea5 | 647 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
648 | if (!arg || *arg == '\0') { |
649 | ret = -EINVAL; | |
650 | goto end; | |
651 | } | |
e8fa9fb0 MD |
652 | if (lttng_is_setuid_setgid()) { |
653 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
654 | "--consumerd32-path"); | |
655 | } else { | |
e6142f2e JG |
656 | config_string_set(&config.consumerd32_bin_path, |
657 | strdup(arg)); | |
658 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
659 | PERROR("strdup"); |
660 | ret = -ENOMEM; | |
661 | } | |
db322c4d | 662 | } |
c0232ea5 | 663 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
664 | if (!arg || *arg == '\0') { |
665 | ret = -EINVAL; | |
666 | goto end; | |
667 | } | |
e8fa9fb0 MD |
668 | if (lttng_is_setuid_setgid()) { |
669 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
670 | "--consumerd32-libdir"); | |
671 | } else { | |
e6142f2e JG |
672 | config_string_set(&config.consumerd32_lib_dir, |
673 | strdup(arg)); | |
674 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
675 | PERROR("strdup"); |
676 | ret = -ENOMEM; | |
677 | } | |
db322c4d | 678 | } |
c0232ea5 | 679 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
680 | if (!arg || *arg == '\0') { |
681 | ret = -EINVAL; | |
682 | goto end; | |
683 | } | |
e8fa9fb0 MD |
684 | if (lttng_is_setuid_setgid()) { |
685 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
686 | "--consumerd64-path"); | |
687 | } else { | |
e6142f2e JG |
688 | config_string_set(&config.consumerd64_bin_path, |
689 | strdup(arg)); | |
690 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
691 | PERROR("strdup"); |
692 | ret = -ENOMEM; | |
693 | } | |
db322c4d | 694 | } |
c0232ea5 | 695 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
696 | if (!arg || *arg == '\0') { |
697 | ret = -EINVAL; | |
698 | goto end; | |
699 | } | |
e8fa9fb0 MD |
700 | if (lttng_is_setuid_setgid()) { |
701 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
702 | "--consumerd64-libdir"); | |
703 | } else { | |
e6142f2e JG |
704 | config_string_set(&config.consumerd64_lib_dir, |
705 | strdup(arg)); | |
706 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
707 | PERROR("strdup"); |
708 | ret = -ENOMEM; | |
709 | } | |
db322c4d | 710 | } |
c0232ea5 | 711 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
712 | if (!arg || *arg == '\0') { |
713 | ret = -EINVAL; | |
714 | goto end; | |
715 | } | |
e8fa9fb0 MD |
716 | if (lttng_is_setuid_setgid()) { |
717 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
718 | "-p, --pidfile"); | |
719 | } else { | |
e6142f2e JG |
720 | config_string_set(&config.pid_file_path, strdup(arg)); |
721 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
722 | PERROR("strdup"); |
723 | ret = -ENOMEM; | |
724 | } | |
db322c4d | 725 | } |
c0232ea5 | 726 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
727 | if (!arg || *arg == '\0') { |
728 | ret = -EINVAL; | |
729 | goto end; | |
730 | } | |
e8fa9fb0 MD |
731 | if (lttng_is_setuid_setgid()) { |
732 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
733 | "--agent-tcp-port"); | |
734 | } else { | |
735 | unsigned long v; | |
4d076222 | 736 | |
e8fa9fb0 MD |
737 | errno = 0; |
738 | v = strtoul(arg, NULL, 0); | |
739 | if (errno != 0 || !isdigit(arg[0])) { | |
740 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
741 | return -1; | |
742 | } | |
743 | if (v == 0 || v >= 65535) { | |
744 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
745 | return -1; | |
746 | } | |
2288467f JG |
747 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
748 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 749 | } |
c0232ea5 | 750 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
751 | if (!arg || *arg == '\0') { |
752 | ret = -EINVAL; | |
753 | goto end; | |
754 | } | |
e8fa9fb0 MD |
755 | if (lttng_is_setuid_setgid()) { |
756 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
757 | "-l, --load"); | |
758 | } else { | |
e6142f2e JG |
759 | config_string_set(&config.load_session_path, strdup(arg)); |
760 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
761 | PERROR("strdup"); |
762 | ret = -ENOMEM; | |
763 | } | |
ef367a93 | 764 | } |
c0232ea5 | 765 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
766 | if (!arg || *arg == '\0') { |
767 | ret = -EINVAL; | |
768 | goto end; | |
769 | } | |
e8fa9fb0 MD |
770 | if (lttng_is_setuid_setgid()) { |
771 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
772 | "--kmod-probes"); | |
773 | } else { | |
e6142f2e JG |
774 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
775 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
776 | PERROR("strdup"); |
777 | ret = -ENOMEM; | |
778 | } | |
c9d42407 | 779 | } |
c0232ea5 | 780 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
781 | if (!arg || *arg == '\0') { |
782 | ret = -EINVAL; | |
783 | goto end; | |
784 | } | |
e8fa9fb0 MD |
785 | if (lttng_is_setuid_setgid()) { |
786 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
787 | "--extra-kmod-probes"); | |
788 | } else { | |
e6142f2e JG |
789 | config_string_set(&config.kmod_extra_probes_list, |
790 | strdup(arg)); | |
791 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
792 | PERROR("strdup"); |
793 | ret = -ENOMEM; | |
794 | } | |
db322c4d | 795 | } |
c0232ea5 JG |
796 | } else if (string_match(optname, "config") || opt == 'f') { |
797 | /* This is handled in set_options() thus silent skip. */ | |
798 | goto end; | |
799 | } else { | |
26296c48 JG |
800 | /* Unknown option or other error. |
801 | * Error is printed by getopt, just return */ | |
802 | ret = -1; | |
803 | } | |
804 | ||
f3dd7ce7 | 805 | end: |
c5d350b2 JG |
806 | if (ret == -EINVAL) { |
807 | const char *opt_name = "unknown"; | |
808 | int i; | |
809 | ||
810 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
811 | i++) { | |
812 | if (opt == long_options[i].val) { | |
813 | opt_name = long_options[i].name; | |
814 | break; | |
815 | } | |
816 | } | |
817 | ||
818 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
819 | opt_name); | |
820 | } | |
f3dd7ce7 | 821 | |
26296c48 JG |
822 | return ret; |
823 | } | |
824 | ||
825 | /* | |
826 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 827 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
828 | * return value conventions. |
829 | */ | |
830 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
831 | { | |
832 | int ret = 0, i; | |
833 | ||
834 | if (!entry || !entry->name || !entry->value) { | |
835 | ret = -EINVAL; | |
836 | goto end; | |
837 | } | |
838 | ||
839 | /* Check if the option is to be ignored */ | |
840 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
841 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
842 | goto end; | |
843 | } | |
844 | } | |
845 | ||
846 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
847 | i++) { | |
848 | ||
849 | /* Ignore if not fully matched. */ | |
850 | if (strcmp(entry->name, long_options[i].name)) { | |
851 | continue; | |
852 | } | |
853 | ||
854 | /* | |
855 | * If the option takes no argument on the command line, we have to | |
856 | * check if the value is "true". We support non-zero numeric values, | |
857 | * true, on and yes. | |
858 | */ | |
859 | if (!long_options[i].has_arg) { | |
860 | ret = config_parse_value(entry->value); | |
861 | if (ret <= 0) { | |
862 | if (ret) { | |
863 | WARN("Invalid configuration value \"%s\" for option %s", | |
864 | entry->value, entry->name); | |
865 | } | |
866 | /* False, skip boolean config option. */ | |
867 | goto end; | |
4d076222 | 868 | } |
26296c48 JG |
869 | } |
870 | ||
871 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
872 | goto end; | |
873 | } | |
874 | ||
875 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
876 | ||
877 | end: | |
878 | return ret; | |
879 | } | |
880 | ||
881 | /* | |
882 | * daemon configuration loading and argument parsing | |
883 | */ | |
884 | static int set_options(int argc, char **argv) | |
885 | { | |
886 | int ret = 0, c = 0, option_index = 0; | |
887 | int orig_optopt = optopt, orig_optind = optind; | |
888 | char *optstring; | |
889 | const char *config_path = NULL; | |
890 | ||
891 | optstring = utils_generate_optstring(long_options, | |
892 | sizeof(long_options) / sizeof(struct option)); | |
893 | if (!optstring) { | |
894 | ret = -ENOMEM; | |
895 | goto end; | |
896 | } | |
897 | ||
898 | /* Check for the --config option */ | |
899 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
900 | &option_index)) != -1) { | |
901 | if (c == '?') { | |
902 | ret = -EINVAL; | |
903 | goto end; | |
904 | } else if (c != 'f') { | |
905 | /* if not equal to --config option. */ | |
906 | continue; | |
907 | } | |
908 | ||
e8fa9fb0 MD |
909 | if (lttng_is_setuid_setgid()) { |
910 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
911 | "-f, --config"); | |
912 | } else { | |
913 | config_path = utils_expand_path(optarg); | |
914 | if (!config_path) { | |
915 | ERR("Failed to resolve path: %s", optarg); | |
916 | } | |
26296c48 JG |
917 | } |
918 | } | |
919 | ||
920 | ret = config_get_section_entries(config_path, config_section_name, | |
921 | config_entry_handler, NULL); | |
922 | if (ret) { | |
923 | if (ret > 0) { | |
924 | ERR("Invalid configuration option at line %i", ret); | |
925 | ret = -1; | |
926 | } | |
927 | goto end; | |
928 | } | |
929 | ||
930 | /* Reset getopt's global state */ | |
931 | optopt = orig_optopt; | |
932 | optind = orig_optind; | |
933 | while (1) { | |
c0232ea5 JG |
934 | option_index = -1; |
935 | /* | |
936 | * getopt_long() will not set option_index if it encounters a | |
937 | * short option. | |
938 | */ | |
939 | c = getopt_long(argc, argv, optstring, long_options, | |
940 | &option_index); | |
26296c48 | 941 | if (c == -1) { |
4d076222 DG |
942 | break; |
943 | } | |
26296c48 | 944 | |
c0232ea5 JG |
945 | /* |
946 | * Pass NULL as the long option name if popt left the index | |
947 | * unset. | |
948 | */ | |
949 | ret = set_option(c, optarg, | |
950 | option_index < 0 ? NULL : | |
951 | long_options[option_index].name); | |
26296c48 JG |
952 | if (ret < 0) { |
953 | break; | |
fac6795d DG |
954 | } |
955 | } | |
956 | ||
26296c48 JG |
957 | end: |
958 | free(optstring); | |
959 | return ret; | |
fac6795d DG |
960 | } |
961 | ||
f472090a JG |
962 | /* |
963 | * Create lockfile using the rundir and return its fd. | |
964 | */ | |
965 | static int create_lockfile(void) | |
966 | { | |
967 | return utils_create_lock_file(config.lock_file_path.value); | |
968 | } | |
969 | ||
fac6795d | 970 | /* |
54d01ffb DG |
971 | * Check if the global socket is available, and if a daemon is answering at the |
972 | * other side. If yes, error is returned. | |
f472090a JG |
973 | * |
974 | * Also attempts to create and hold the lock file. | |
fac6795d | 975 | */ |
cf3af59e | 976 | static int check_existing_daemon(void) |
fac6795d | 977 | { |
f472090a JG |
978 | int ret = 0; |
979 | ||
7d8234d9 | 980 | /* Is there anybody out there ? */ |
099e26bd | 981 | if (lttng_session_daemon_alive()) { |
f472090a JG |
982 | ret = -EEXIST; |
983 | goto end; | |
099e26bd | 984 | } |
b09c7c76 | 985 | |
f472090a JG |
986 | lockfile_fd = create_lockfile(); |
987 | if (lockfile_fd < 0) { | |
988 | ret = -EEXIST; | |
989 | goto end; | |
990 | } | |
991 | end: | |
992 | return ret; | |
993 | } | |
994 | ||
995 | static void sessiond_cleanup_lock_file(void) | |
996 | { | |
997 | int ret; | |
998 | ||
999 | /* | |
1000 | * Cleanup lock file by deleting it and finaly closing it which will | |
1001 | * release the file system lock. | |
1002 | */ | |
1003 | if (lockfile_fd >= 0) { | |
1004 | ret = remove(config.lock_file_path.value); | |
1005 | if (ret < 0) { | |
1006 | PERROR("remove lock file"); | |
1007 | } | |
1008 | ret = close(lockfile_fd); | |
1009 | if (ret < 0) { | |
1010 | PERROR("close lock file"); | |
1011 | } | |
1012 | } | |
fac6795d DG |
1013 | } |
1014 | ||
fac6795d | 1015 | /* |
d063d709 | 1016 | * Set the tracing group gid onto the client socket. |
5e16da05 | 1017 | * |
d063d709 | 1018 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 1019 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 1020 | */ |
be040666 | 1021 | static int set_permissions(char *rundir) |
fac6795d DG |
1022 | { |
1023 | int ret; | |
996b65c8 | 1024 | gid_t gid; |
fac6795d | 1025 | |
28ab59d0 JR |
1026 | ret = utils_get_group_id(config.tracing_group_name.value, true, &gid); |
1027 | if (ret) { | |
1028 | /* Default to root group. */ | |
1029 | gid = 0; | |
1030 | } | |
fac6795d | 1031 | |
d6f42150 | 1032 | /* Set lttng run dir */ |
be040666 | 1033 | ret = chown(rundir, 0, gid); |
d6f42150 | 1034 | if (ret < 0) { |
be040666 | 1035 | ERR("Unable to set group on %s", rundir); |
76d7553f | 1036 | PERROR("chown"); |
d6f42150 DG |
1037 | } |
1038 | ||
6c71277b MD |
1039 | /* |
1040 | * Ensure all applications and tracing group can search the run | |
1041 | * dir. Allow everyone to read the directory, since it does not | |
1042 | * buy us anything to hide its content. | |
1043 | */ | |
1044 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
1045 | if (ret < 0) { |
1046 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 1047 | PERROR("chmod"); |
d1613cf5 JN |
1048 | } |
1049 | ||
d6f42150 | 1050 | /* lttng client socket path */ |
e6142f2e | 1051 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 1052 | if (ret < 0) { |
e6142f2e | 1053 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 1054 | PERROR("chown"); |
d6f42150 DG |
1055 | } |
1056 | ||
3bd1e081 | 1057 | /* kconsumer error socket path */ |
6c71277b | 1058 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 1059 | if (ret < 0) { |
3bd1e081 | 1060 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 1061 | PERROR("chown"); |
3bd1e081 MD |
1062 | } |
1063 | ||
7753dea8 | 1064 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 1065 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
1066 | if (ret < 0) { |
1067 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 1068 | PERROR("chown"); |
7753dea8 MD |
1069 | } |
1070 | ||
1071 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 1072 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1073 | if (ret < 0) { |
7753dea8 | 1074 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 1075 | PERROR("chown"); |
fac6795d DG |
1076 | } |
1077 | ||
d6f42150 | 1078 | DBG("All permissions are set"); |
e07ae692 | 1079 | |
fac6795d DG |
1080 | return ret; |
1081 | } | |
1082 | ||
d6f42150 | 1083 | /* |
d063d709 | 1084 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1085 | */ |
e6142f2e | 1086 | static int create_lttng_rundir(void) |
d6f42150 DG |
1087 | { |
1088 | int ret; | |
1089 | ||
e6142f2e | 1090 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 1091 | |
e6142f2e | 1092 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 1093 | if (ret < 0) { |
b1f11e69 | 1094 | if (errno != EEXIST) { |
e6142f2e | 1095 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
1096 | goto error; |
1097 | } else { | |
1098 | ret = 0; | |
1099 | } | |
d6f42150 DG |
1100 | } |
1101 | ||
1102 | error: | |
1103 | return ret; | |
1104 | } | |
1105 | ||
1106 | /* | |
e6142f2e | 1107 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1108 | * session daemon. |
d6f42150 | 1109 | */ |
e6142f2e | 1110 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1111 | { |
1112 | int ret; | |
e6142f2e | 1113 | char *path = NULL; |
d6f42150 | 1114 | |
6c71277b | 1115 | switch (consumer_data->type) { |
7753dea8 | 1116 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 1117 | path = config.kconsumerd_path.value; |
7753dea8 MD |
1118 | break; |
1119 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 1120 | path = config.consumerd64_path.value; |
7753dea8 MD |
1121 | break; |
1122 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 1123 | path = config.consumerd32_path.value; |
7753dea8 MD |
1124 | break; |
1125 | default: | |
1126 | ERR("Consumer type unknown"); | |
1127 | ret = -EINVAL; | |
1128 | goto error; | |
d6f42150 | 1129 | } |
e6142f2e | 1130 | assert(path); |
d6f42150 | 1131 | |
67e40797 DG |
1132 | DBG2("Creating consumer directory: %s", path); |
1133 | ||
6c71277b | 1134 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1135 | if (ret < 0 && errno != EEXIST) { |
1136 | PERROR("mkdir"); | |
1137 | ERR("Failed to create %s", path); | |
1138 | goto error; | |
d6f42150 | 1139 | } |
6c71277b | 1140 | if (is_root) { |
28ab59d0 JR |
1141 | gid_t gid; |
1142 | ||
1143 | ret = utils_get_group_id(config.tracing_group_name.value, true, | |
1144 | &gid); | |
1145 | if (ret) { | |
1146 | /* Default to root group. */ | |
1147 | gid = 0; | |
1148 | } | |
1149 | ||
1150 | ret = chown(path, 0, gid); | |
6c71277b MD |
1151 | if (ret < 0) { |
1152 | ERR("Unable to set group on %s", path); | |
1153 | PERROR("chown"); | |
1154 | goto error; | |
1155 | } | |
1156 | } | |
d6f42150 | 1157 | |
e6142f2e | 1158 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1159 | consumer_data->err_sock = |
1160 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1161 | if (consumer_data->err_sock < 0) { | |
1162 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1163 | ret = -1; |
1164 | goto error; | |
1165 | } | |
1166 | ||
a24f05ab MD |
1167 | /* |
1168 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1169 | * show must go on. | |
1170 | */ | |
1171 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1172 | if (ret < 0) { | |
1173 | PERROR("utils_set_fd_cloexec"); | |
1174 | /* continue anyway */ | |
1175 | } | |
1176 | ||
d6f42150 | 1177 | /* File permission MUST be 660 */ |
3bd1e081 | 1178 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 1179 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1180 | if (ret < 0) { |
3bd1e081 | 1181 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1182 | PERROR("chmod"); |
d6f42150 DG |
1183 | goto error; |
1184 | } | |
1185 | ||
1186 | error: | |
1187 | return ret; | |
1188 | } | |
1189 | ||
fac6795d | 1190 | /* |
d063d709 | 1191 | * Signal handler for the daemon |
cf3af59e | 1192 | * |
54d01ffb DG |
1193 | * Simply stop all worker threads, leaving main() return gracefully after |
1194 | * joining all threads and calling cleanup(). | |
fac6795d DG |
1195 | */ |
1196 | static void sighandler(int sig) | |
1197 | { | |
1198 | switch (sig) { | |
cf3af59e | 1199 | case SIGINT: |
af87c45a | 1200 | DBG("SIGINT caught"); |
cf3af59e MD |
1201 | stop_threads(); |
1202 | break; | |
1203 | case SIGTERM: | |
af87c45a | 1204 | DBG("SIGTERM caught"); |
cf3af59e MD |
1205 | stop_threads(); |
1206 | break; | |
0bb7724a DG |
1207 | case SIGUSR1: |
1208 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1209 | break; | |
cf3af59e MD |
1210 | default: |
1211 | break; | |
fac6795d | 1212 | } |
fac6795d DG |
1213 | } |
1214 | ||
1215 | /* | |
d063d709 | 1216 | * Setup signal handler for : |
1d4b027a | 1217 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1218 | */ |
1d4b027a | 1219 | static int set_signal_handler(void) |
fac6795d | 1220 | { |
1d4b027a DG |
1221 | int ret = 0; |
1222 | struct sigaction sa; | |
1223 | sigset_t sigset; | |
fac6795d | 1224 | |
1d4b027a | 1225 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1226 | PERROR("sigemptyset"); |
1d4b027a DG |
1227 | return ret; |
1228 | } | |
d6f42150 | 1229 | |
1d4b027a DG |
1230 | sa.sa_mask = sigset; |
1231 | sa.sa_flags = 0; | |
0072e5e2 MD |
1232 | |
1233 | sa.sa_handler = sighandler; | |
1d4b027a | 1234 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 1235 | PERROR("sigaction"); |
1d4b027a | 1236 | return ret; |
d6f42150 DG |
1237 | } |
1238 | ||
1d4b027a | 1239 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 1240 | PERROR("sigaction"); |
1d4b027a | 1241 | return ret; |
d6f42150 | 1242 | } |
aaf26714 | 1243 | |
0072e5e2 | 1244 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 1245 | PERROR("sigaction"); |
1d4b027a | 1246 | return ret; |
8c0faa1d DG |
1247 | } |
1248 | ||
0072e5e2 MD |
1249 | sa.sa_handler = SIG_IGN; |
1250 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
1251 | PERROR("sigaction"); |
1252 | return ret; | |
1253 | } | |
1254 | ||
1255 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
1256 | |
1257 | return ret; | |
fac6795d DG |
1258 | } |
1259 | ||
f3ed775e | 1260 | /* |
d063d709 | 1261 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1262 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
1263 | */ |
1264 | static void set_ulimit(void) | |
1265 | { | |
1266 | int ret; | |
1267 | struct rlimit lim; | |
1268 | ||
514bb9f0 | 1269 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1270 | lim.rlim_cur = 65535; |
1271 | lim.rlim_max = 65535; | |
1272 | ||
1273 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1274 | if (ret < 0) { | |
76d7553f | 1275 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1276 | } |
1277 | } | |
1278 | ||
4a15001e | 1279 | static int write_pidfile(void) |
35f90c40 | 1280 | { |
e6142f2e | 1281 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
1282 | } |
1283 | ||
e6142f2e JG |
1284 | static int set_clock_plugin_env(void) |
1285 | { | |
1286 | int ret = 0; | |
1287 | char *env_value = NULL; | |
cd9290dd | 1288 | |
e6142f2e JG |
1289 | if (!config.lttng_ust_clock_plugin.value) { |
1290 | goto end; | |
1291 | } | |
1292 | ||
1293 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
1294 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 1295 | if (ret < 0) { |
e6142f2e JG |
1296 | PERROR("asprintf"); |
1297 | goto end; | |
cd9290dd DG |
1298 | } |
1299 | ||
e6142f2e JG |
1300 | ret = putenv(env_value); |
1301 | if (ret) { | |
1302 | free(env_value); | |
1303 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1304 | goto end; | |
1305 | } | |
cd9290dd | 1306 | |
e6142f2e JG |
1307 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
1308 | config.lttng_ust_clock_plugin.value); | |
1309 | end: | |
4a15001e | 1310 | return ret; |
ef367a93 JG |
1311 | } |
1312 | ||
99d688f2 JG |
1313 | static void destroy_all_sessions_and_wait(void) |
1314 | { | |
1315 | struct ltt_session *session, *tmp; | |
1316 | struct ltt_session_list *session_list; | |
1317 | ||
1318 | session_list = session_get_list(); | |
1319 | DBG("Initiating destruction of all sessions"); | |
1320 | ||
1321 | if (!session_list) { | |
1322 | return; | |
1323 | } | |
1324 | ||
99d688f2 JG |
1325 | session_lock_list(); |
1326 | /* Initiate the destruction of all sessions. */ | |
1327 | cds_list_for_each_entry_safe(session, tmp, | |
1328 | &session_list->head, list) { | |
1329 | if (!session_get(session)) { | |
1330 | continue; | |
1331 | } | |
1332 | ||
1333 | session_lock(session); | |
1334 | if (session->destroyed) { | |
1335 | goto unlock_session; | |
1336 | } | |
63763958 | 1337 | (void) cmd_stop_trace(session); |
99d688f2 JG |
1338 | (void) cmd_destroy_session(session, |
1339 | notification_thread_handle); | |
1340 | unlock_session: | |
1341 | session_unlock(session); | |
1342 | session_put(session); | |
1343 | } | |
1344 | session_unlock_list(); | |
1345 | ||
1346 | /* Wait for the destruction of all sessions to complete. */ | |
1347 | DBG("Waiting for the destruction of all sessions to complete"); | |
1348 | session_list_wait_empty(); | |
1349 | DBG("Destruction of all sessions completed"); | |
1350 | } | |
1351 | ||
929f71ec JG |
1352 | static int run_as_worker_post_fork_cleanup(void *data) |
1353 | { | |
1354 | struct sessiond_config *sessiond_config = data; | |
1355 | ||
1356 | sessiond_config_fini(sessiond_config); | |
1357 | return 0; | |
1358 | } | |
1359 | ||
1360 | static int launch_run_as_worker(const char *procname) | |
1361 | { | |
1362 | /* | |
1363 | * Clean-up before forking the run-as worker. Any dynamically | |
1364 | * allocated memory of which the worker is not aware will | |
1365 | * be leaked as the process forks a run-as worker (and performs | |
1366 | * no exec*()). The same would apply to any opened fd. | |
1367 | */ | |
1368 | return run_as_create_worker(procname, run_as_worker_post_fork_cleanup, | |
1369 | &config); | |
1370 | } | |
1371 | ||
fac6795d DG |
1372 | /* |
1373 | * main | |
1374 | */ | |
1375 | int main(int argc, char **argv) | |
1376 | { | |
4a15001e | 1377 | int ret = 0, retval = 0; |
e6142f2e | 1378 | const char *env_app_timeout; |
b3530820 JG |
1379 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
1380 | *ust64_channel_monitor_pipe = NULL, | |
1381 | *kernel_channel_monitor_pipe = NULL; | |
a3707772 | 1382 | struct lttng_thread *ht_cleanup_thread = NULL; |
bc26e826 | 1383 | struct timer_thread_parameters timer_thread_parameters; |
64d9b072 JG |
1384 | /* Rotation thread handle. */ |
1385 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
1386 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
1387 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
917a718d | 1388 | struct lttng_thread *client_thread = NULL; |
4a91420c | 1389 | struct lttng_thread *notification_thread = NULL; |
bd9addf7 | 1390 | struct lttng_thread *register_apps_thread = NULL; |
fac6795d | 1391 | |
335a95b7 MD |
1392 | init_kernel_workarounds(); |
1393 | ||
f6a9efaa DG |
1394 | rcu_register_thread(); |
1395 | ||
4a15001e MD |
1396 | if (set_signal_handler()) { |
1397 | retval = -1; | |
1398 | goto exit_set_signal_handler; | |
0bb7724a DG |
1399 | } |
1400 | ||
92816cc3 | 1401 | if (timer_signal_init()) { |
d086f507 JD |
1402 | retval = -1; |
1403 | goto exit_set_signal_handler; | |
1404 | } | |
1405 | ||
12744796 DG |
1406 | page_size = sysconf(_SC_PAGESIZE); |
1407 | if (page_size < 0) { | |
1408 | PERROR("sysconf _SC_PAGESIZE"); | |
1409 | page_size = LONG_MAX; | |
1410 | WARN("Fallback page size to %ld", page_size); | |
1411 | } | |
1412 | ||
e6142f2e JG |
1413 | ret = sessiond_config_init(&config); |
1414 | if (ret) { | |
1415 | retval = -1; | |
1416 | goto exit_set_signal_handler; | |
1417 | } | |
1418 | ||
2788b494 JR |
1419 | /* |
1420 | * Init config from environment variables. | |
1421 | * Command line option override env configuration per-doc. Do env first. | |
1422 | */ | |
1423 | sessiond_config_apply_env_config(&config); | |
1424 | ||
4a15001e MD |
1425 | /* |
1426 | * Parse arguments and load the daemon configuration file. | |
1427 | * | |
1428 | * We have an exit_options exit path to free memory reserved by | |
1429 | * set_options. This is needed because the rest of sessiond_cleanup() | |
1430 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
1431 | * depends on set_options. | |
1432 | */ | |
fac6795d | 1433 | progname = argv[0]; |
4a15001e MD |
1434 | if (set_options(argc, argv)) { |
1435 | retval = -1; | |
1436 | goto exit_options; | |
fac6795d DG |
1437 | } |
1438 | ||
e6142f2e JG |
1439 | /* |
1440 | * Resolve all paths received as arguments, configuration option, or | |
1441 | * through environment variable as absolute paths. This is necessary | |
1442 | * since daemonizing causes the sessiond's current working directory | |
1443 | * to '/'. | |
1444 | */ | |
1445 | ret = sessiond_config_resolve_paths(&config); | |
1446 | if (ret) { | |
1447 | goto exit_options; | |
1448 | } | |
1449 | ||
1450 | /* Apply config. */ | |
1451 | lttng_opt_verbose = config.verbose; | |
1452 | lttng_opt_quiet = config.quiet; | |
1453 | kconsumer_data.err_unix_sock_path = | |
1454 | config.kconsumerd_err_unix_sock_path.value; | |
1455 | kconsumer_data.cmd_unix_sock_path = | |
1456 | config.kconsumerd_cmd_unix_sock_path.value; | |
1457 | ustconsumer32_data.err_unix_sock_path = | |
1458 | config.consumerd32_err_unix_sock_path.value; | |
1459 | ustconsumer32_data.cmd_unix_sock_path = | |
1460 | config.consumerd32_cmd_unix_sock_path.value; | |
1461 | ustconsumer64_data.err_unix_sock_path = | |
1462 | config.consumerd64_err_unix_sock_path.value; | |
1463 | ustconsumer64_data.cmd_unix_sock_path = | |
1464 | config.consumerd64_cmd_unix_sock_path.value; | |
1465 | set_clock_plugin_env(); | |
1466 | ||
1467 | sessiond_config_log(&config); | |
1468 | ||
f472090a JG |
1469 | if (create_lttng_rundir()) { |
1470 | retval = -1; | |
1471 | goto exit_options; | |
1472 | } | |
1473 | ||
1474 | /* Abort launch if a session daemon is already running. */ | |
1475 | if (check_existing_daemon()) { | |
1476 | ERR("A session daemon is already running."); | |
1477 | retval = -1; | |
1478 | goto exit_options; | |
1479 | } | |
1480 | ||
fac6795d | 1481 | /* Daemonize */ |
e6142f2e | 1482 | if (config.daemonize || config.background) { |
ceed52b5 MD |
1483 | int i; |
1484 | ||
72dd7491 | 1485 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 1486 | !config.background); |
53094c05 | 1487 | if (ret < 0) { |
4a15001e MD |
1488 | retval = -1; |
1489 | goto exit_options; | |
53094c05 | 1490 | } |
0bb7724a | 1491 | |
ceed52b5 | 1492 | /* |
0bb7724a | 1493 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 1494 | * closed, in case we are called with more opened file |
f472090a | 1495 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
1496 | */ |
1497 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
1498 | if (i == lockfile_fd) { |
1499 | continue; | |
1500 | } | |
ceed52b5 MD |
1501 | (void) close(i); |
1502 | } | |
1503 | } | |
1504 | ||
929f71ec | 1505 | if (launch_run_as_worker(argv[0]) < 0) { |
7567352f MD |
1506 | goto exit_create_run_as_worker_cleanup; |
1507 | } | |
1508 | ||
4a15001e MD |
1509 | /* |
1510 | * Starting from here, we can create threads. This needs to be after | |
1511 | * lttng_daemonize due to RCU. | |
1512 | */ | |
1513 | ||
1514 | /* | |
1515 | * Initialize the health check subsystem. This call should set the | |
1516 | * appropriate time values. | |
1517 | */ | |
1518 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
1519 | if (!health_sessiond) { | |
1520 | PERROR("health_app_create error"); | |
1521 | retval = -1; | |
0d64e8fb | 1522 | goto stop_threads; |
4a15001e MD |
1523 | } |
1524 | ||
4a15001e | 1525 | /* Create thread to clean up RCU hash tables */ |
a3707772 JG |
1526 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
1527 | if (!ht_cleanup_thread) { | |
4a15001e | 1528 | retval = -1; |
0d64e8fb | 1529 | goto stop_threads; |
4a15001e MD |
1530 | } |
1531 | ||
ceed52b5 | 1532 | /* Create thread quit pipe */ |
a7333da7 | 1533 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e | 1534 | retval = -1; |
0d64e8fb | 1535 | goto stop_threads; |
fac6795d DG |
1536 | } |
1537 | ||
1538 | /* Check if daemon is UID = 0 */ | |
1539 | is_root = !getuid(); | |
fac6795d | 1540 | if (is_root) { |
67e40797 | 1541 | /* Create global run dir with root access */ |
67e40797 | 1542 | |
b3530820 JG |
1543 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
1544 | if (!kernel_channel_monitor_pipe) { | |
1545 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
1546 | retval = -1; | |
0d64e8fb | 1547 | goto stop_threads; |
b3530820 JG |
1548 | } |
1549 | kconsumer_data.channel_monitor_pipe = | |
1550 | lttng_pipe_release_writefd( | |
1551 | kernel_channel_monitor_pipe); | |
1552 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
1553 | retval = -1; | |
0d64e8fb | 1554 | goto stop_threads; |
b3530820 | 1555 | } |
fac6795d DG |
1556 | } |
1557 | ||
5c827ce0 DG |
1558 | /* Set consumer initial state */ |
1559 | kernel_consumerd_state = CONSUMER_STOPPED; | |
1560 | ust_consumerd_state = CONSUMER_STOPPED; | |
1561 | ||
b3530820 JG |
1562 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
1563 | if (!ust32_channel_monitor_pipe) { | |
1564 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
1565 | retval = -1; | |
0d64e8fb | 1566 | goto stop_threads; |
b3530820 JG |
1567 | } |
1568 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1569 | ust32_channel_monitor_pipe); | |
1570 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
1571 | retval = -1; | |
0d64e8fb | 1572 | goto stop_threads; |
b3530820 | 1573 | } |
62c43103 | 1574 | |
d086f507 | 1575 | /* |
92816cc3 JG |
1576 | * The rotation_thread_timer_queue structure is shared between the |
1577 | * sessiond timer thread and the rotation thread. The main thread keeps | |
1578 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 1579 | */ |
92816cc3 | 1580 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
1581 | if (!rotation_timer_queue) { |
1582 | retval = -1; | |
0d64e8fb | 1583 | goto stop_threads; |
d086f507 | 1584 | } |
bc26e826 JG |
1585 | timer_thread_parameters.rotation_thread_job_queue = |
1586 | rotation_timer_queue; | |
67e40797 | 1587 | |
b3530820 JG |
1588 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
1589 | if (!ust64_channel_monitor_pipe) { | |
1590 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
1591 | retval = -1; | |
0d64e8fb | 1592 | goto stop_threads; |
b3530820 JG |
1593 | } |
1594 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1595 | ust64_channel_monitor_pipe); | |
1596 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
1597 | retval = -1; | |
0d64e8fb | 1598 | goto stop_threads; |
b3530820 | 1599 | } |
847177cd | 1600 | |
1427f9b2 DG |
1601 | /* |
1602 | * Init UST app hash table. Alloc hash table before this point since | |
1603 | * cleanup() can get called after that point. | |
1604 | */ | |
4a15001e | 1605 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 1606 | ERR("Failed to allocate UST app hash table"); |
4a15001e | 1607 | retval = -1; |
0d64e8fb | 1608 | goto stop_threads; |
4a15001e | 1609 | } |
1427f9b2 | 1610 | |
6a4e4039 JG |
1611 | /* |
1612 | * Initialize agent app hash table. We allocate the hash table here | |
1613 | * since cleanup() can get called after this point. | |
1614 | */ | |
1615 | if (agent_app_ht_alloc()) { | |
1616 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e | 1617 | retval = -1; |
0d64e8fb | 1618 | goto stop_threads; |
f20baf8e DG |
1619 | } |
1620 | ||
a88df331 DG |
1621 | /* |
1622 | * These actions must be executed as root. We do that *after* setting up | |
1623 | * the sockets path because we MUST make the check for another daemon using | |
1624 | * those paths *before* trying to set the kernel consumer sockets and init | |
1625 | * kernel tracer. | |
1626 | */ | |
1627 | if (is_root) { | |
e6142f2e | 1628 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e | 1629 | retval = -1; |
0d64e8fb | 1630 | goto stop_threads; |
7753dea8 MD |
1631 | } |
1632 | ||
a88df331 | 1633 | /* Setup kernel tracer */ |
e6142f2e | 1634 | if (!config.no_kernel) { |
4fba7219 | 1635 | init_kernel_tracer(); |
89588270 DG |
1636 | if (kernel_tracer_fd >= 0) { |
1637 | ret = syscall_init_table(); | |
1638 | if (ret < 0) { | |
4a15001e MD |
1639 | ERR("Unable to populate syscall table. " |
1640 | "Syscall tracing won't work " | |
1641 | "for this session daemon."); | |
89588270 | 1642 | } |
834978fd | 1643 | } |
4fba7219 | 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 | } |
ef367a93 | 1816 | } |
7a485870 | 1817 | |
3316b9d6 JG |
1818 | /* Load sessions. */ |
1819 | ret = config_load_session(config.load_session_path.value, | |
1820 | NULL, 1, 1, NULL); | |
4a15001e | 1821 | if (ret) { |
3316b9d6 | 1822 | ERR("Session load failed: %s", error_get_str(ret)); |
4a15001e | 1823 | retval = -1; |
0d64e8fb | 1824 | goto stop_threads; |
4a15001e MD |
1825 | } |
1826 | ||
3316b9d6 JG |
1827 | /* Initialization completed. */ |
1828 | sessiond_signal_parents(); | |
1829 | ||
4a15001e MD |
1830 | /* |
1831 | * This is where we start awaiting program completion (e.g. through | |
1832 | * signal that asks threads to teardown). | |
1833 | */ | |
1834 | ||
99d688f2 JG |
1835 | /* Initiate teardown once activity occurs on the quit pipe. */ |
1836 | sessiond_wait_for_quit_pipe(-1U); | |
917a718d | 1837 | |
0d64e8fb | 1838 | stop_threads: |
917a718d JG |
1839 | /* |
1840 | * Ensure that the client thread is no longer accepting new commands, | |
1841 | * which could cause new sessions to be created. | |
1842 | */ | |
0d64e8fb JG |
1843 | if (client_thread) { |
1844 | lttng_thread_shutdown(client_thread); | |
917a718d | 1845 | lttng_thread_put(client_thread); |
917a718d JG |
1846 | } |
1847 | ||
99d688f2 | 1848 | destroy_all_sessions_and_wait(); |
0d64e8fb | 1849 | |
bd9addf7 JG |
1850 | if (register_apps_thread) { |
1851 | lttng_thread_shutdown(register_apps_thread); | |
1852 | lttng_thread_put(register_apps_thread); | |
1853 | } | |
a3707772 | 1854 | lttng_thread_list_shutdown_orphans(); |
917a718d | 1855 | |
4d62fbf8 MD |
1856 | /* |
1857 | * Wait for all pending call_rcu work to complete before tearing | |
1858 | * down data structures. call_rcu worker may be trying to | |
1859 | * perform lookups in those structures. | |
1860 | */ | |
1861 | rcu_barrier(); | |
4a15001e MD |
1862 | /* |
1863 | * sessiond_cleanup() is called when no other thread is running, except | |
1864 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
1865 | */ | |
1866 | rcu_thread_online(); | |
1867 | sessiond_cleanup(); | |
06f525de | 1868 | |
4a91420c JG |
1869 | if (notification_thread) { |
1870 | lttng_thread_shutdown(notification_thread); | |
1871 | lttng_thread_put(notification_thread); | |
1872 | } | |
1873 | ||
c4d5de9d JG |
1874 | /* |
1875 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
1876 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
1877 | * the queue is empty before shutting down the clean-up thread. | |
1878 | */ | |
1879 | rcu_barrier(); | |
1880 | ||
a3707772 JG |
1881 | if (ht_cleanup_thread) { |
1882 | lttng_thread_shutdown(ht_cleanup_thread); | |
1883 | lttng_thread_put(ht_cleanup_thread); | |
1884 | } | |
1885 | ||
64d9b072 JG |
1886 | rcu_thread_offline(); |
1887 | rcu_unregister_thread(); | |
1888 | ||
1889 | if (rotation_thread_handle) { | |
1890 | rotation_thread_handle_destroy(rotation_thread_handle); | |
1891 | } | |
1892 | ||
d086f507 JD |
1893 | /* |
1894 | * After the rotation and timer thread have quit, we can safely destroy | |
1895 | * the rotation_timer_queue. | |
1896 | */ | |
92816cc3 | 1897 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
c8a9de5a JG |
1898 | /* |
1899 | * The teardown of the notification system is performed after the | |
1900 | * session daemon's teardown in order to allow it to be notified | |
1901 | * of the active session and channels at the moment of the teardown. | |
1902 | */ | |
1903 | if (notification_thread_handle) { | |
1904 | notification_thread_handle_destroy(notification_thread_handle); | |
1905 | } | |
b3530820 JG |
1906 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
1907 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
1908 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
4a15001e | 1909 | |
4a15001e | 1910 | health_app_destroy(health_sessiond); |
7567352f | 1911 | exit_create_run_as_worker_cleanup: |
4a15001e | 1912 | exit_options: |
f472090a | 1913 | sessiond_cleanup_lock_file(); |
4a15001e MD |
1914 | sessiond_cleanup_options(); |
1915 | ||
1916 | exit_set_signal_handler: | |
1917 | if (!retval) { | |
cf3af59e | 1918 | exit(EXIT_SUCCESS); |
4a15001e MD |
1919 | } else { |
1920 | exit(EXIT_FAILURE); | |
67e40797 | 1921 | } |
fac6795d | 1922 | } |