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" |
4ac33400 | 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" |
432b38d7 | 82 | #include "timer.h" |
548468b9 | 83 | #include "thread.h" |
050e613c | 84 | #include "client.h" |
dd5875e7 | 85 | #include "dispatch.h" |
22b80785 | 86 | #include "register.h" |
cdffb210 | 87 | #include "manage-apps.h" |
45f6525f | 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 }; |
53c51aaa | 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 | /* |
51bb4dbb | 161 | * Section name to look for in the daemon configuration file. |
97bc1426 | 162 | */ |
51bb4dbb | 163 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 164 | |
51bb4dbb 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"); | |
51bb4dbb | 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; |
48a86f68 | 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 | */ | |
51bb4dbb | 287 | sessiond_close_quit_pipe(); |
53c51aaa JG |
288 | utils_close_pipe(apps_cmd_pipe); |
289 | utils_close_pipe(apps_cmd_notify_pipe); | |
45f6525f | 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 | |
6af972a2 | 328 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 329 | |
6a4e4039 JG |
330 | DBG("Cleaning up all agent apps"); |
331 | agent_app_ht_clean(); | |
099e26bd | 332 | DBG("Closing all UST sockets"); |
56fff090 | 333 | ust_app_clean_list(); |
7972aab2 | 334 | buffer_reg_destroy_registries(); |
099e26bd | 335 | |
caf7f341 MD |
336 | close_consumer_sockets(); |
337 | ||
338 | wait_consumer(&kconsumer_data); | |
339 | wait_consumer(&ustconsumer64_data); | |
340 | wait_consumer(&ustconsumer32_data); | |
341 | ||
e6142f2e | 342 | if (is_root && !config.no_kernel) { |
4fba7219 | 343 | DBG2("Closing kernel fd"); |
a4b35e07 | 344 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
345 | ret = close(kernel_tracer_fd); |
346 | if (ret) { | |
347 | PERROR("close"); | |
348 | } | |
a4b35e07 | 349 | } |
2f50c8a3 | 350 | DBG("Unloading kernel modules"); |
096102bd | 351 | modprobe_remove_lttng_all(); |
834978fd | 352 | free(syscall_table); |
2f50c8a3 | 353 | } |
2f77fc4b | 354 | |
c9cb3e7d JG |
355 | /* |
356 | * We do NOT rmdir rundir because there are other processes | |
357 | * using it, for instance lttng-relayd, which can start in | |
358 | * parallel with this teardown. | |
359 | */ | |
4a15001e MD |
360 | } |
361 | ||
362 | /* | |
363 | * Cleanup the daemon's option data structures. | |
364 | */ | |
365 | static void sessiond_cleanup_options(void) | |
366 | { | |
367 | DBG("Cleaning up options"); | |
368 | ||
e6142f2e | 369 | sessiond_config_fini(&config); |
c9cb3e7d | 370 | |
7567352f | 371 | run_as_destroy_worker(); |
fac6795d DG |
372 | } |
373 | ||
b73401da | 374 | /* |
096102bd | 375 | * Setup necessary data for kernel tracer action. |
b73401da | 376 | */ |
096102bd | 377 | static int init_kernel_tracer(void) |
b73401da DG |
378 | { |
379 | int ret; | |
b73401da | 380 | |
096102bd DG |
381 | /* Modprobe lttng kernel modules */ |
382 | ret = modprobe_lttng_control(); | |
b73401da | 383 | if (ret < 0) { |
b73401da DG |
384 | goto error; |
385 | } | |
386 | ||
096102bd DG |
387 | /* Open debugfs lttng */ |
388 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
389 | if (kernel_tracer_fd < 0) { | |
390 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 391 | goto error_open; |
54d01ffb DG |
392 | } |
393 | ||
2f77fc4b | 394 | /* Validate kernel version */ |
88076e89 JD |
395 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
396 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
397 | if (ret < 0) { |
398 | goto error_version; | |
b551a063 | 399 | } |
54d01ffb | 400 | |
2f77fc4b DG |
401 | ret = modprobe_lttng_data(); |
402 | if (ret < 0) { | |
403 | goto error_modules; | |
54d01ffb DG |
404 | } |
405 | ||
6e21424e JR |
406 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
407 | kernel_tracer_fd); | |
408 | if (ret < 0) { | |
409 | goto error_modules; | |
410 | } | |
411 | ||
412 | if (ret < 1) { | |
413 | WARN("Kernel tracer does not support buffer monitoring. " | |
414 | "The monitoring timer of channels in the kernel domain " | |
415 | "will be set to 0 (disabled)."); | |
416 | } | |
417 | ||
2f77fc4b DG |
418 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
419 | return 0; | |
420 | ||
421 | error_version: | |
422 | modprobe_remove_lttng_control(); | |
423 | ret = close(kernel_tracer_fd); | |
424 | if (ret) { | |
425 | PERROR("close"); | |
b551a063 | 426 | } |
2f77fc4b | 427 | kernel_tracer_fd = -1; |
f73fabfd | 428 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 429 | |
2f77fc4b DG |
430 | error_modules: |
431 | ret = close(kernel_tracer_fd); | |
432 | if (ret) { | |
433 | PERROR("close"); | |
b551a063 | 434 | } |
54d01ffb | 435 | |
2f77fc4b DG |
436 | error_open: |
437 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
438 | |
439 | error: | |
2f77fc4b DG |
440 | WARN("No kernel tracer available"); |
441 | kernel_tracer_fd = -1; | |
442 | if (!is_root) { | |
f73fabfd | 443 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 444 | } else { |
f73fabfd | 445 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 446 | } |
54d01ffb DG |
447 | } |
448 | ||
050e613c | 449 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 450 | { |
050e613c | 451 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
452 | } |
453 | ||
00e2e675 | 454 | /* |
050e613c JG |
455 | * Take an option from the getopt output and set it in the right variable to be |
456 | * used later. | |
36b588ed | 457 | * |
050e613c | 458 | * Return 0 on success else a negative value. |
00e2e675 | 459 | */ |
050e613c | 460 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 461 | { |
050e613c | 462 | int ret = 0; |
fac6795d | 463 | |
c0232ea5 | 464 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
465 | if (!arg || *arg == '\0') { |
466 | ret = -EINVAL; | |
467 | goto end; | |
468 | } | |
e8fa9fb0 MD |
469 | if (lttng_is_setuid_setgid()) { |
470 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
471 | "-c, --client-sock"); | |
472 | } else { | |
e6142f2e JG |
473 | config_string_set(&config.client_unix_sock_path, |
474 | strdup(arg)); | |
475 | if (!config.client_unix_sock_path.value) { | |
476 | ret = -ENOMEM; | |
477 | PERROR("strdup"); | |
478 | } | |
e8fa9fb0 | 479 | } |
c0232ea5 | 480 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
481 | if (!arg || *arg == '\0') { |
482 | ret = -EINVAL; | |
483 | goto end; | |
484 | } | |
e8fa9fb0 MD |
485 | if (lttng_is_setuid_setgid()) { |
486 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
487 | "-a, --apps-sock"); | |
488 | } else { | |
e6142f2e JG |
489 | config_string_set(&config.apps_unix_sock_path, |
490 | strdup(arg)); | |
491 | if (!config.apps_unix_sock_path.value) { | |
492 | ret = -ENOMEM; | |
493 | PERROR("strdup"); | |
494 | } | |
e8fa9fb0 | 495 | } |
c0232ea5 | 496 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 497 | config.daemonize = true; |
c0232ea5 | 498 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 499 | config.background = true; |
c0232ea5 | 500 | } else if (string_match(optname, "group") || opt == 'g') { |
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 | "-g, --group"); | |
508 | } else { | |
e6142f2e JG |
509 | config_string_set(&config.tracing_group_name, |
510 | strdup(arg)); | |
511 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 512 | ret = -ENOMEM; |
e6142f2e | 513 | PERROR("strdup"); |
e8fa9fb0 | 514 | } |
db322c4d | 515 | } |
c0232ea5 | 516 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 517 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 518 | if (ret) { |
4fc83d94 | 519 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
520 | perror("exec"); |
521 | } | |
522 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 523 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
524 | fprintf(stdout, "%s\n", VERSION); |
525 | exit(EXIT_SUCCESS); | |
c0232ea5 | 526 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 527 | config.sig_parent = true; |
c0232ea5 | 528 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
529 | if (!arg || *arg == '\0') { |
530 | ret = -EINVAL; | |
531 | goto end; | |
532 | } | |
e8fa9fb0 MD |
533 | if (lttng_is_setuid_setgid()) { |
534 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
535 | "--kconsumerd-err-sock"); | |
536 | } else { | |
e6142f2e JG |
537 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
538 | strdup(arg)); | |
539 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
540 | ret = -ENOMEM; | |
541 | PERROR("strdup"); | |
542 | } | |
e8fa9fb0 | 543 | } |
c0232ea5 | 544 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
545 | if (!arg || *arg == '\0') { |
546 | ret = -EINVAL; | |
547 | goto end; | |
548 | } | |
e8fa9fb0 MD |
549 | if (lttng_is_setuid_setgid()) { |
550 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
551 | "--kconsumerd-cmd-sock"); | |
552 | } else { | |
e6142f2e JG |
553 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
554 | strdup(arg)); | |
555 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
556 | ret = -ENOMEM; | |
557 | PERROR("strdup"); | |
558 | } | |
e8fa9fb0 | 559 | } |
c0232ea5 | 560 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
561 | if (!arg || *arg == '\0') { |
562 | ret = -EINVAL; | |
563 | goto end; | |
564 | } | |
e8fa9fb0 MD |
565 | if (lttng_is_setuid_setgid()) { |
566 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
567 | "--ustconsumerd64-err-sock"); | |
568 | } else { | |
e6142f2e JG |
569 | config_string_set(&config.consumerd64_err_unix_sock_path, |
570 | strdup(arg)); | |
571 | if (!config.consumerd64_err_unix_sock_path.value) { | |
572 | ret = -ENOMEM; | |
573 | PERROR("strdup"); | |
574 | } | |
e8fa9fb0 | 575 | } |
c0232ea5 | 576 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
577 | if (!arg || *arg == '\0') { |
578 | ret = -EINVAL; | |
579 | goto end; | |
580 | } | |
e8fa9fb0 MD |
581 | if (lttng_is_setuid_setgid()) { |
582 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
583 | "--ustconsumerd64-cmd-sock"); | |
584 | } else { | |
e6142f2e JG |
585 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
586 | strdup(arg)); | |
587 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
588 | ret = -ENOMEM; | |
589 | PERROR("strdup"); | |
590 | } | |
e8fa9fb0 | 591 | } |
c0232ea5 | 592 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
593 | if (!arg || *arg == '\0') { |
594 | ret = -EINVAL; | |
595 | goto end; | |
596 | } | |
e8fa9fb0 MD |
597 | if (lttng_is_setuid_setgid()) { |
598 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
599 | "--ustconsumerd32-err-sock"); | |
600 | } else { | |
e6142f2e JG |
601 | config_string_set(&config.consumerd32_err_unix_sock_path, |
602 | strdup(arg)); | |
603 | if (!config.consumerd32_err_unix_sock_path.value) { | |
604 | ret = -ENOMEM; | |
605 | PERROR("strdup"); | |
606 | } | |
e8fa9fb0 | 607 | } |
c0232ea5 | 608 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
609 | if (!arg || *arg == '\0') { |
610 | ret = -EINVAL; | |
611 | goto end; | |
612 | } | |
e8fa9fb0 MD |
613 | if (lttng_is_setuid_setgid()) { |
614 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
615 | "--ustconsumerd32-cmd-sock"); | |
616 | } else { | |
e6142f2e JG |
617 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
618 | strdup(arg)); | |
619 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
620 | ret = -ENOMEM; | |
621 | PERROR("strdup"); | |
622 | } | |
e8fa9fb0 | 623 | } |
c0232ea5 | 624 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 625 | config.no_kernel = true; |
c0232ea5 | 626 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 627 | config.quiet = true; |
c0232ea5 | 628 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
629 | /* Verbose level can increase using multiple -v */ |
630 | if (arg) { | |
13755a18 | 631 | /* Value obtained from config file */ |
e6142f2e | 632 | config.verbose = config_parse_value(arg); |
26296c48 | 633 | } else { |
13755a18 | 634 | /* -v used on command line */ |
e6142f2e | 635 | config.verbose++; |
26296c48 | 636 | } |
13755a18 | 637 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
638 | config.verbose = config.verbose < 0 ? 0 : |
639 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 640 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 641 | if (arg) { |
e6142f2e | 642 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 643 | } else { |
e6142f2e | 644 | config.verbose_consumer++; |
26296c48 | 645 | } |
c0232ea5 | 646 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
647 | if (!arg || *arg == '\0') { |
648 | ret = -EINVAL; | |
649 | goto end; | |
650 | } | |
e8fa9fb0 MD |
651 | if (lttng_is_setuid_setgid()) { |
652 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
653 | "--consumerd32-path"); | |
654 | } else { | |
e6142f2e JG |
655 | config_string_set(&config.consumerd32_bin_path, |
656 | strdup(arg)); | |
657 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
658 | PERROR("strdup"); |
659 | ret = -ENOMEM; | |
660 | } | |
db322c4d | 661 | } |
c0232ea5 | 662 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
663 | if (!arg || *arg == '\0') { |
664 | ret = -EINVAL; | |
665 | goto end; | |
666 | } | |
e8fa9fb0 MD |
667 | if (lttng_is_setuid_setgid()) { |
668 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
669 | "--consumerd32-libdir"); | |
670 | } else { | |
e6142f2e JG |
671 | config_string_set(&config.consumerd32_lib_dir, |
672 | strdup(arg)); | |
673 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
674 | PERROR("strdup"); |
675 | ret = -ENOMEM; | |
676 | } | |
db322c4d | 677 | } |
c0232ea5 | 678 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
679 | if (!arg || *arg == '\0') { |
680 | ret = -EINVAL; | |
681 | goto end; | |
682 | } | |
e8fa9fb0 MD |
683 | if (lttng_is_setuid_setgid()) { |
684 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
685 | "--consumerd64-path"); | |
686 | } else { | |
e6142f2e JG |
687 | config_string_set(&config.consumerd64_bin_path, |
688 | strdup(arg)); | |
689 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
690 | PERROR("strdup"); |
691 | ret = -ENOMEM; | |
692 | } | |
db322c4d | 693 | } |
c0232ea5 | 694 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
695 | if (!arg || *arg == '\0') { |
696 | ret = -EINVAL; | |
697 | goto end; | |
698 | } | |
e8fa9fb0 MD |
699 | if (lttng_is_setuid_setgid()) { |
700 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
701 | "--consumerd64-libdir"); | |
702 | } else { | |
e6142f2e JG |
703 | config_string_set(&config.consumerd64_lib_dir, |
704 | strdup(arg)); | |
705 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
706 | PERROR("strdup"); |
707 | ret = -ENOMEM; | |
708 | } | |
db322c4d | 709 | } |
c0232ea5 | 710 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
711 | if (!arg || *arg == '\0') { |
712 | ret = -EINVAL; | |
713 | goto end; | |
714 | } | |
e8fa9fb0 MD |
715 | if (lttng_is_setuid_setgid()) { |
716 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
717 | "-p, --pidfile"); | |
718 | } else { | |
e6142f2e JG |
719 | config_string_set(&config.pid_file_path, strdup(arg)); |
720 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
721 | PERROR("strdup"); |
722 | ret = -ENOMEM; | |
723 | } | |
db322c4d | 724 | } |
c0232ea5 | 725 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
726 | if (!arg || *arg == '\0') { |
727 | ret = -EINVAL; | |
728 | goto end; | |
729 | } | |
e8fa9fb0 MD |
730 | if (lttng_is_setuid_setgid()) { |
731 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
732 | "--agent-tcp-port"); | |
733 | } else { | |
734 | unsigned long v; | |
4d076222 | 735 | |
e8fa9fb0 MD |
736 | errno = 0; |
737 | v = strtoul(arg, NULL, 0); | |
738 | if (errno != 0 || !isdigit(arg[0])) { | |
739 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
740 | return -1; | |
741 | } | |
742 | if (v == 0 || v >= 65535) { | |
743 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
744 | return -1; | |
745 | } | |
2288467f JG |
746 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
747 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 748 | } |
c0232ea5 | 749 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
750 | if (!arg || *arg == '\0') { |
751 | ret = -EINVAL; | |
752 | goto end; | |
753 | } | |
e8fa9fb0 MD |
754 | if (lttng_is_setuid_setgid()) { |
755 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
756 | "-l, --load"); | |
757 | } else { | |
e6142f2e JG |
758 | config_string_set(&config.load_session_path, strdup(arg)); |
759 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
760 | PERROR("strdup"); |
761 | ret = -ENOMEM; | |
762 | } | |
ef367a93 | 763 | } |
c0232ea5 | 764 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
765 | if (!arg || *arg == '\0') { |
766 | ret = -EINVAL; | |
767 | goto end; | |
768 | } | |
e8fa9fb0 MD |
769 | if (lttng_is_setuid_setgid()) { |
770 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
771 | "--kmod-probes"); | |
772 | } else { | |
e6142f2e JG |
773 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
774 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
775 | PERROR("strdup"); |
776 | ret = -ENOMEM; | |
777 | } | |
c9d42407 | 778 | } |
c0232ea5 | 779 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
780 | if (!arg || *arg == '\0') { |
781 | ret = -EINVAL; | |
782 | goto end; | |
783 | } | |
e8fa9fb0 MD |
784 | if (lttng_is_setuid_setgid()) { |
785 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
786 | "--extra-kmod-probes"); | |
787 | } else { | |
e6142f2e JG |
788 | config_string_set(&config.kmod_extra_probes_list, |
789 | strdup(arg)); | |
790 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
791 | PERROR("strdup"); |
792 | ret = -ENOMEM; | |
793 | } | |
db322c4d | 794 | } |
c0232ea5 JG |
795 | } else if (string_match(optname, "config") || opt == 'f') { |
796 | /* This is handled in set_options() thus silent skip. */ | |
797 | goto end; | |
798 | } else { | |
26296c48 JG |
799 | /* Unknown option or other error. |
800 | * Error is printed by getopt, just return */ | |
801 | ret = -1; | |
802 | } | |
803 | ||
f3dd7ce7 | 804 | end: |
c5d350b2 JG |
805 | if (ret == -EINVAL) { |
806 | const char *opt_name = "unknown"; | |
807 | int i; | |
808 | ||
809 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
810 | i++) { | |
811 | if (opt == long_options[i].val) { | |
812 | opt_name = long_options[i].name; | |
813 | break; | |
814 | } | |
815 | } | |
816 | ||
817 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
818 | opt_name); | |
819 | } | |
f3dd7ce7 | 820 | |
26296c48 JG |
821 | return ret; |
822 | } | |
823 | ||
824 | /* | |
825 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 826 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
827 | * return value conventions. |
828 | */ | |
829 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
830 | { | |
831 | int ret = 0, i; | |
832 | ||
833 | if (!entry || !entry->name || !entry->value) { | |
834 | ret = -EINVAL; | |
835 | goto end; | |
836 | } | |
837 | ||
838 | /* Check if the option is to be ignored */ | |
839 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
840 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
841 | goto end; | |
842 | } | |
843 | } | |
844 | ||
845 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
846 | i++) { | |
847 | ||
848 | /* Ignore if not fully matched. */ | |
849 | if (strcmp(entry->name, long_options[i].name)) { | |
850 | continue; | |
851 | } | |
852 | ||
853 | /* | |
854 | * If the option takes no argument on the command line, we have to | |
855 | * check if the value is "true". We support non-zero numeric values, | |
856 | * true, on and yes. | |
857 | */ | |
858 | if (!long_options[i].has_arg) { | |
859 | ret = config_parse_value(entry->value); | |
860 | if (ret <= 0) { | |
861 | if (ret) { | |
862 | WARN("Invalid configuration value \"%s\" for option %s", | |
863 | entry->value, entry->name); | |
864 | } | |
865 | /* False, skip boolean config option. */ | |
866 | goto end; | |
4d076222 | 867 | } |
26296c48 JG |
868 | } |
869 | ||
870 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
871 | goto end; | |
872 | } | |
873 | ||
874 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
875 | ||
876 | end: | |
877 | return ret; | |
878 | } | |
879 | ||
880 | /* | |
881 | * daemon configuration loading and argument parsing | |
882 | */ | |
883 | static int set_options(int argc, char **argv) | |
884 | { | |
885 | int ret = 0, c = 0, option_index = 0; | |
886 | int orig_optopt = optopt, orig_optind = optind; | |
887 | char *optstring; | |
888 | const char *config_path = NULL; | |
889 | ||
890 | optstring = utils_generate_optstring(long_options, | |
891 | sizeof(long_options) / sizeof(struct option)); | |
892 | if (!optstring) { | |
893 | ret = -ENOMEM; | |
894 | goto end; | |
895 | } | |
896 | ||
897 | /* Check for the --config option */ | |
898 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
899 | &option_index)) != -1) { | |
900 | if (c == '?') { | |
901 | ret = -EINVAL; | |
902 | goto end; | |
903 | } else if (c != 'f') { | |
904 | /* if not equal to --config option. */ | |
905 | continue; | |
906 | } | |
907 | ||
e8fa9fb0 MD |
908 | if (lttng_is_setuid_setgid()) { |
909 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
910 | "-f, --config"); | |
911 | } else { | |
912 | config_path = utils_expand_path(optarg); | |
913 | if (!config_path) { | |
914 | ERR("Failed to resolve path: %s", optarg); | |
915 | } | |
26296c48 JG |
916 | } |
917 | } | |
918 | ||
919 | ret = config_get_section_entries(config_path, config_section_name, | |
920 | config_entry_handler, NULL); | |
921 | if (ret) { | |
922 | if (ret > 0) { | |
923 | ERR("Invalid configuration option at line %i", ret); | |
924 | ret = -1; | |
925 | } | |
926 | goto end; | |
927 | } | |
928 | ||
929 | /* Reset getopt's global state */ | |
930 | optopt = orig_optopt; | |
931 | optind = orig_optind; | |
932 | while (1) { | |
c0232ea5 JG |
933 | option_index = -1; |
934 | /* | |
935 | * getopt_long() will not set option_index if it encounters a | |
936 | * short option. | |
937 | */ | |
938 | c = getopt_long(argc, argv, optstring, long_options, | |
939 | &option_index); | |
26296c48 | 940 | if (c == -1) { |
4d076222 DG |
941 | break; |
942 | } | |
26296c48 | 943 | |
c0232ea5 JG |
944 | /* |
945 | * Pass NULL as the long option name if popt left the index | |
946 | * unset. | |
947 | */ | |
948 | ret = set_option(c, optarg, | |
949 | option_index < 0 ? NULL : | |
950 | long_options[option_index].name); | |
26296c48 JG |
951 | if (ret < 0) { |
952 | break; | |
fac6795d DG |
953 | } |
954 | } | |
955 | ||
26296c48 JG |
956 | end: |
957 | free(optstring); | |
958 | return ret; | |
fac6795d DG |
959 | } |
960 | ||
f472090a JG |
961 | /* |
962 | * Create lockfile using the rundir and return its fd. | |
963 | */ | |
964 | static int create_lockfile(void) | |
965 | { | |
966 | return utils_create_lock_file(config.lock_file_path.value); | |
967 | } | |
968 | ||
fac6795d | 969 | /* |
54d01ffb DG |
970 | * Check if the global socket is available, and if a daemon is answering at the |
971 | * other side. If yes, error is returned. | |
f472090a JG |
972 | * |
973 | * Also attempts to create and hold the lock file. | |
fac6795d | 974 | */ |
cf3af59e | 975 | static int check_existing_daemon(void) |
fac6795d | 976 | { |
f472090a JG |
977 | int ret = 0; |
978 | ||
7d8234d9 | 979 | /* Is there anybody out there ? */ |
099e26bd | 980 | if (lttng_session_daemon_alive()) { |
f472090a JG |
981 | ret = -EEXIST; |
982 | goto end; | |
099e26bd | 983 | } |
b09c7c76 | 984 | |
f472090a JG |
985 | lockfile_fd = create_lockfile(); |
986 | if (lockfile_fd < 0) { | |
987 | ret = -EEXIST; | |
988 | goto end; | |
989 | } | |
990 | end: | |
991 | return ret; | |
992 | } | |
993 | ||
994 | static void sessiond_cleanup_lock_file(void) | |
995 | { | |
996 | int ret; | |
997 | ||
998 | /* | |
999 | * Cleanup lock file by deleting it and finaly closing it which will | |
1000 | * release the file system lock. | |
1001 | */ | |
1002 | if (lockfile_fd >= 0) { | |
1003 | ret = remove(config.lock_file_path.value); | |
1004 | if (ret < 0) { | |
1005 | PERROR("remove lock file"); | |
1006 | } | |
1007 | ret = close(lockfile_fd); | |
1008 | if (ret < 0) { | |
1009 | PERROR("close lock file"); | |
1010 | } | |
1011 | } | |
fac6795d DG |
1012 | } |
1013 | ||
fac6795d | 1014 | /* |
d063d709 | 1015 | * Set the tracing group gid onto the client socket. |
5e16da05 | 1016 | * |
d063d709 | 1017 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 1018 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 1019 | */ |
be040666 | 1020 | static int set_permissions(char *rundir) |
fac6795d DG |
1021 | { |
1022 | int ret; | |
996b65c8 | 1023 | gid_t gid; |
fac6795d | 1024 | |
6710e5aa JR |
1025 | ret = utils_get_group_id(config.tracing_group_name.value, true, &gid); |
1026 | if (ret) { | |
1027 | /* Default to root group. */ | |
1028 | gid = 0; | |
1029 | } | |
fac6795d | 1030 | |
d6f42150 | 1031 | /* Set lttng run dir */ |
be040666 | 1032 | ret = chown(rundir, 0, gid); |
d6f42150 | 1033 | if (ret < 0) { |
be040666 | 1034 | ERR("Unable to set group on %s", rundir); |
76d7553f | 1035 | PERROR("chown"); |
d6f42150 DG |
1036 | } |
1037 | ||
6c71277b MD |
1038 | /* |
1039 | * Ensure all applications and tracing group can search the run | |
1040 | * dir. Allow everyone to read the directory, since it does not | |
1041 | * buy us anything to hide its content. | |
1042 | */ | |
1043 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
1044 | if (ret < 0) { |
1045 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 1046 | PERROR("chmod"); |
d1613cf5 JN |
1047 | } |
1048 | ||
d6f42150 | 1049 | /* lttng client socket path */ |
e6142f2e | 1050 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 1051 | if (ret < 0) { |
e6142f2e | 1052 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 1053 | PERROR("chown"); |
d6f42150 DG |
1054 | } |
1055 | ||
3bd1e081 | 1056 | /* kconsumer error socket path */ |
6c71277b | 1057 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 1058 | if (ret < 0) { |
3bd1e081 | 1059 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 1060 | PERROR("chown"); |
3bd1e081 MD |
1061 | } |
1062 | ||
7753dea8 | 1063 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 1064 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
1065 | if (ret < 0) { |
1066 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 1067 | PERROR("chown"); |
7753dea8 MD |
1068 | } |
1069 | ||
1070 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 1071 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1072 | if (ret < 0) { |
7753dea8 | 1073 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 1074 | PERROR("chown"); |
fac6795d DG |
1075 | } |
1076 | ||
d6f42150 | 1077 | DBG("All permissions are set"); |
e07ae692 | 1078 | |
fac6795d DG |
1079 | return ret; |
1080 | } | |
1081 | ||
d6f42150 | 1082 | /* |
d063d709 | 1083 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1084 | */ |
e6142f2e | 1085 | static int create_lttng_rundir(void) |
d6f42150 DG |
1086 | { |
1087 | int ret; | |
1088 | ||
e6142f2e | 1089 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 1090 | |
e6142f2e | 1091 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 1092 | if (ret < 0) { |
b1f11e69 | 1093 | if (errno != EEXIST) { |
e6142f2e | 1094 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
1095 | goto error; |
1096 | } else { | |
1097 | ret = 0; | |
1098 | } | |
d6f42150 DG |
1099 | } |
1100 | ||
1101 | error: | |
1102 | return ret; | |
1103 | } | |
1104 | ||
1105 | /* | |
e6142f2e | 1106 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1107 | * session daemon. |
d6f42150 | 1108 | */ |
e6142f2e | 1109 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1110 | { |
1111 | int ret; | |
e6142f2e | 1112 | char *path = NULL; |
d6f42150 | 1113 | |
6c71277b | 1114 | switch (consumer_data->type) { |
7753dea8 | 1115 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 1116 | path = config.kconsumerd_path.value; |
7753dea8 MD |
1117 | break; |
1118 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 1119 | path = config.consumerd64_path.value; |
7753dea8 MD |
1120 | break; |
1121 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 1122 | path = config.consumerd32_path.value; |
7753dea8 MD |
1123 | break; |
1124 | default: | |
1125 | ERR("Consumer type unknown"); | |
1126 | ret = -EINVAL; | |
1127 | goto error; | |
d6f42150 | 1128 | } |
e6142f2e | 1129 | assert(path); |
d6f42150 | 1130 | |
67e40797 DG |
1131 | DBG2("Creating consumer directory: %s", path); |
1132 | ||
6c71277b | 1133 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1134 | if (ret < 0 && errno != EEXIST) { |
1135 | PERROR("mkdir"); | |
1136 | ERR("Failed to create %s", path); | |
1137 | goto error; | |
d6f42150 | 1138 | } |
6c71277b | 1139 | if (is_root) { |
6710e5aa JR |
1140 | gid_t gid; |
1141 | ||
1142 | ret = utils_get_group_id(config.tracing_group_name.value, true, | |
1143 | &gid); | |
1144 | if (ret) { | |
1145 | /* Default to root group. */ | |
1146 | gid = 0; | |
1147 | } | |
1148 | ||
1149 | ret = chown(path, 0, gid); | |
6c71277b MD |
1150 | if (ret < 0) { |
1151 | ERR("Unable to set group on %s", path); | |
1152 | PERROR("chown"); | |
1153 | goto error; | |
1154 | } | |
1155 | } | |
d6f42150 | 1156 | |
e6142f2e | 1157 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1158 | consumer_data->err_sock = |
1159 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1160 | if (consumer_data->err_sock < 0) { | |
1161 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1162 | ret = -1; |
1163 | goto error; | |
1164 | } | |
1165 | ||
a24f05ab MD |
1166 | /* |
1167 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1168 | * show must go on. | |
1169 | */ | |
1170 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
1171 | if (ret < 0) { | |
1172 | PERROR("utils_set_fd_cloexec"); | |
1173 | /* continue anyway */ | |
1174 | } | |
1175 | ||
d6f42150 | 1176 | /* File permission MUST be 660 */ |
3bd1e081 | 1177 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 1178 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 1179 | if (ret < 0) { |
3bd1e081 | 1180 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 1181 | PERROR("chmod"); |
d6f42150 DG |
1182 | goto error; |
1183 | } | |
1184 | ||
1185 | error: | |
1186 | return ret; | |
1187 | } | |
1188 | ||
fac6795d | 1189 | /* |
d063d709 | 1190 | * Signal handler for the daemon |
cf3af59e | 1191 | * |
54d01ffb DG |
1192 | * Simply stop all worker threads, leaving main() return gracefully after |
1193 | * joining all threads and calling cleanup(). | |
fac6795d DG |
1194 | */ |
1195 | static void sighandler(int sig) | |
1196 | { | |
1197 | switch (sig) { | |
cf3af59e | 1198 | case SIGINT: |
af87c45a | 1199 | DBG("SIGINT caught"); |
cf3af59e MD |
1200 | stop_threads(); |
1201 | break; | |
1202 | case SIGTERM: | |
af87c45a | 1203 | DBG("SIGTERM caught"); |
cf3af59e MD |
1204 | stop_threads(); |
1205 | break; | |
0bb7724a DG |
1206 | case SIGUSR1: |
1207 | CMM_STORE_SHARED(recv_child_signal, 1); | |
1208 | break; | |
cf3af59e MD |
1209 | default: |
1210 | break; | |
fac6795d | 1211 | } |
fac6795d DG |
1212 | } |
1213 | ||
1214 | /* | |
d063d709 | 1215 | * Setup signal handler for : |
1d4b027a | 1216 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 1217 | */ |
1d4b027a | 1218 | static int set_signal_handler(void) |
fac6795d | 1219 | { |
1d4b027a DG |
1220 | int ret = 0; |
1221 | struct sigaction sa; | |
1222 | sigset_t sigset; | |
fac6795d | 1223 | |
1d4b027a | 1224 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 1225 | PERROR("sigemptyset"); |
1d4b027a DG |
1226 | return ret; |
1227 | } | |
d6f42150 | 1228 | |
1d4b027a DG |
1229 | sa.sa_mask = sigset; |
1230 | sa.sa_flags = 0; | |
0072e5e2 MD |
1231 | |
1232 | sa.sa_handler = sighandler; | |
1d4b027a | 1233 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 1234 | PERROR("sigaction"); |
1d4b027a | 1235 | return ret; |
d6f42150 DG |
1236 | } |
1237 | ||
1d4b027a | 1238 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 1239 | PERROR("sigaction"); |
1d4b027a | 1240 | return ret; |
d6f42150 | 1241 | } |
aaf26714 | 1242 | |
0072e5e2 | 1243 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 1244 | PERROR("sigaction"); |
1d4b027a | 1245 | return ret; |
8c0faa1d DG |
1246 | } |
1247 | ||
0072e5e2 MD |
1248 | sa.sa_handler = SIG_IGN; |
1249 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
1250 | PERROR("sigaction"); |
1251 | return ret; | |
1252 | } | |
1253 | ||
1254 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
1255 | |
1256 | return ret; | |
fac6795d DG |
1257 | } |
1258 | ||
f3ed775e | 1259 | /* |
d063d709 | 1260 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 1261 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
1262 | */ |
1263 | static void set_ulimit(void) | |
1264 | { | |
1265 | int ret; | |
1266 | struct rlimit lim; | |
1267 | ||
514bb9f0 | 1268 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
1269 | lim.rlim_cur = 65535; |
1270 | lim.rlim_max = 65535; | |
1271 | ||
1272 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
1273 | if (ret < 0) { | |
76d7553f | 1274 | PERROR("failed to set open files limit"); |
f3ed775e DG |
1275 | } |
1276 | } | |
1277 | ||
4a15001e | 1278 | static int write_pidfile(void) |
35f90c40 | 1279 | { |
e6142f2e | 1280 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
1281 | } |
1282 | ||
e6142f2e JG |
1283 | static int set_clock_plugin_env(void) |
1284 | { | |
1285 | int ret = 0; | |
1286 | char *env_value = NULL; | |
cd9290dd | 1287 | |
e6142f2e JG |
1288 | if (!config.lttng_ust_clock_plugin.value) { |
1289 | goto end; | |
1290 | } | |
1291 | ||
1292 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
1293 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 1294 | if (ret < 0) { |
e6142f2e JG |
1295 | PERROR("asprintf"); |
1296 | goto end; | |
cd9290dd DG |
1297 | } |
1298 | ||
e6142f2e JG |
1299 | ret = putenv(env_value); |
1300 | if (ret) { | |
1301 | free(env_value); | |
1302 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
1303 | goto end; | |
1304 | } | |
cd9290dd | 1305 | |
e6142f2e JG |
1306 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
1307 | config.lttng_ust_clock_plugin.value); | |
1308 | end: | |
4a15001e | 1309 | return ret; |
ef367a93 JG |
1310 | } |
1311 | ||
6af972a2 JG |
1312 | static void destroy_all_sessions_and_wait(void) |
1313 | { | |
1314 | struct ltt_session *session, *tmp; | |
1315 | struct ltt_session_list *session_list; | |
1316 | ||
1317 | session_list = session_get_list(); | |
1318 | DBG("Initiating destruction of all sessions"); | |
1319 | ||
1320 | if (!session_list) { | |
1321 | return; | |
1322 | } | |
1323 | ||
6af972a2 JG |
1324 | session_lock_list(); |
1325 | /* Initiate the destruction of all sessions. */ | |
1326 | cds_list_for_each_entry_safe(session, tmp, | |
1327 | &session_list->head, list) { | |
1328 | if (!session_get(session)) { | |
1329 | continue; | |
1330 | } | |
1331 | ||
1332 | session_lock(session); | |
1333 | if (session->destroyed) { | |
1334 | goto unlock_session; | |
1335 | } | |
293d47db | 1336 | (void) cmd_stop_trace(session); |
823a1989 JG |
1337 | (void) cmd_destroy_session(session, notification_thread_handle, |
1338 | NULL); | |
6af972a2 JG |
1339 | unlock_session: |
1340 | session_unlock(session); | |
1341 | session_put(session); | |
1342 | } | |
1343 | session_unlock_list(); | |
1344 | ||
1345 | /* Wait for the destruction of all sessions to complete. */ | |
1346 | DBG("Waiting for the destruction of all sessions to complete"); | |
1347 | session_list_wait_empty(); | |
1348 | DBG("Destruction of all sessions completed"); | |
1349 | } | |
1350 | ||
5bedd986 JG |
1351 | static int run_as_worker_post_fork_cleanup(void *data) |
1352 | { | |
1353 | struct sessiond_config *sessiond_config = data; | |
1354 | ||
1355 | sessiond_config_fini(sessiond_config); | |
1356 | return 0; | |
1357 | } | |
1358 | ||
1359 | static int launch_run_as_worker(const char *procname) | |
1360 | { | |
1361 | /* | |
1362 | * Clean-up before forking the run-as worker. Any dynamically | |
1363 | * allocated memory of which the worker is not aware will | |
1364 | * be leaked as the process forks a run-as worker (and performs | |
1365 | * no exec*()). The same would apply to any opened fd. | |
1366 | */ | |
1367 | return run_as_create_worker(procname, run_as_worker_post_fork_cleanup, | |
1368 | &config); | |
1369 | } | |
1370 | ||
3438f6f5 JG |
1371 | static void sessiond_uuid_log(void) |
1372 | { | |
1373 | char uuid_str[UUID_STR_LEN]; | |
1374 | ||
1375 | lttng_uuid_to_str(sessiond_uuid, uuid_str); | |
1376 | DBG("Starting lttng-sessiond {%s}", uuid_str); | |
1377 | } | |
1378 | ||
fac6795d DG |
1379 | /* |
1380 | * main | |
1381 | */ | |
1382 | int main(int argc, char **argv) | |
1383 | { | |
4a15001e | 1384 | int ret = 0, retval = 0; |
e6142f2e | 1385 | const char *env_app_timeout; |
b3530820 JG |
1386 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
1387 | *ust64_channel_monitor_pipe = NULL, | |
1388 | *kernel_channel_monitor_pipe = NULL; | |
548468b9 | 1389 | struct lttng_thread *ht_cleanup_thread = NULL; |
a5ab9e05 | 1390 | struct timer_thread_parameters timer_thread_parameters; |
a430759b JG |
1391 | /* Rotation thread handle. */ |
1392 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
1393 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
1394 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
050e613c | 1395 | struct lttng_thread *client_thread = NULL; |
4de27698 | 1396 | struct lttng_thread *notification_thread = NULL; |
143745a6 | 1397 | struct lttng_thread *register_apps_thread = NULL; |
fac6795d | 1398 | |
335a95b7 MD |
1399 | init_kernel_workarounds(); |
1400 | ||
f6a9efaa DG |
1401 | rcu_register_thread(); |
1402 | ||
4a15001e MD |
1403 | if (set_signal_handler()) { |
1404 | retval = -1; | |
1405 | goto exit_set_signal_handler; | |
0bb7724a DG |
1406 | } |
1407 | ||
82528808 | 1408 | if (timer_signal_init()) { |
d086f507 JD |
1409 | retval = -1; |
1410 | goto exit_set_signal_handler; | |
1411 | } | |
1412 | ||
12744796 DG |
1413 | page_size = sysconf(_SC_PAGESIZE); |
1414 | if (page_size < 0) { | |
1415 | PERROR("sysconf _SC_PAGESIZE"); | |
1416 | page_size = LONG_MAX; | |
1417 | WARN("Fallback page size to %ld", page_size); | |
1418 | } | |
1419 | ||
e6142f2e JG |
1420 | ret = sessiond_config_init(&config); |
1421 | if (ret) { | |
1422 | retval = -1; | |
1423 | goto exit_set_signal_handler; | |
1424 | } | |
1425 | ||
2788b494 JR |
1426 | /* |
1427 | * Init config from environment variables. | |
1428 | * Command line option override env configuration per-doc. Do env first. | |
1429 | */ | |
1430 | sessiond_config_apply_env_config(&config); | |
1431 | ||
4a15001e MD |
1432 | /* |
1433 | * Parse arguments and load the daemon configuration file. | |
1434 | * | |
1435 | * We have an exit_options exit path to free memory reserved by | |
1436 | * set_options. This is needed because the rest of sessiond_cleanup() | |
1437 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
1438 | * depends on set_options. | |
1439 | */ | |
fac6795d | 1440 | progname = argv[0]; |
4a15001e MD |
1441 | if (set_options(argc, argv)) { |
1442 | retval = -1; | |
1443 | goto exit_options; | |
fac6795d DG |
1444 | } |
1445 | ||
e6142f2e JG |
1446 | /* |
1447 | * Resolve all paths received as arguments, configuration option, or | |
1448 | * through environment variable as absolute paths. This is necessary | |
1449 | * since daemonizing causes the sessiond's current working directory | |
1450 | * to '/'. | |
1451 | */ | |
1452 | ret = sessiond_config_resolve_paths(&config); | |
1453 | if (ret) { | |
1454 | goto exit_options; | |
1455 | } | |
1456 | ||
1457 | /* Apply config. */ | |
1458 | lttng_opt_verbose = config.verbose; | |
1459 | lttng_opt_quiet = config.quiet; | |
1460 | kconsumer_data.err_unix_sock_path = | |
1461 | config.kconsumerd_err_unix_sock_path.value; | |
1462 | kconsumer_data.cmd_unix_sock_path = | |
1463 | config.kconsumerd_cmd_unix_sock_path.value; | |
1464 | ustconsumer32_data.err_unix_sock_path = | |
1465 | config.consumerd32_err_unix_sock_path.value; | |
1466 | ustconsumer32_data.cmd_unix_sock_path = | |
1467 | config.consumerd32_cmd_unix_sock_path.value; | |
1468 | ustconsumer64_data.err_unix_sock_path = | |
1469 | config.consumerd64_err_unix_sock_path.value; | |
1470 | ustconsumer64_data.cmd_unix_sock_path = | |
1471 | config.consumerd64_cmd_unix_sock_path.value; | |
1472 | set_clock_plugin_env(); | |
1473 | ||
1474 | sessiond_config_log(&config); | |
3438f6f5 | 1475 | sessiond_uuid_log(); |
e6142f2e | 1476 | |
f472090a JG |
1477 | if (create_lttng_rundir()) { |
1478 | retval = -1; | |
1479 | goto exit_options; | |
1480 | } | |
1481 | ||
1482 | /* Abort launch if a session daemon is already running. */ | |
1483 | if (check_existing_daemon()) { | |
1484 | ERR("A session daemon is already running."); | |
1485 | retval = -1; | |
1486 | goto exit_options; | |
1487 | } | |
1488 | ||
fac6795d | 1489 | /* Daemonize */ |
e6142f2e | 1490 | if (config.daemonize || config.background) { |
ceed52b5 MD |
1491 | int i; |
1492 | ||
72dd7491 | 1493 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 1494 | !config.background); |
53094c05 | 1495 | if (ret < 0) { |
4a15001e MD |
1496 | retval = -1; |
1497 | goto exit_options; | |
53094c05 | 1498 | } |
0bb7724a | 1499 | |
ceed52b5 | 1500 | /* |
0bb7724a | 1501 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 1502 | * closed, in case we are called with more opened file |
f472090a | 1503 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
1504 | */ |
1505 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
1506 | if (i == lockfile_fd) { |
1507 | continue; | |
1508 | } | |
ceed52b5 MD |
1509 | (void) close(i); |
1510 | } | |
1511 | } | |
1512 | ||
5bedd986 | 1513 | if (launch_run_as_worker(argv[0]) < 0) { |
7567352f MD |
1514 | goto exit_create_run_as_worker_cleanup; |
1515 | } | |
1516 | ||
4a15001e MD |
1517 | /* |
1518 | * Starting from here, we can create threads. This needs to be after | |
1519 | * lttng_daemonize due to RCU. | |
1520 | */ | |
1521 | ||
1522 | /* | |
1523 | * Initialize the health check subsystem. This call should set the | |
1524 | * appropriate time values. | |
1525 | */ | |
1526 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
1527 | if (!health_sessiond) { | |
1528 | PERROR("health_app_create error"); | |
1529 | retval = -1; | |
813ef6cb | 1530 | goto stop_threads; |
4a15001e MD |
1531 | } |
1532 | ||
4a15001e | 1533 | /* Create thread to clean up RCU hash tables */ |
548468b9 JG |
1534 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
1535 | if (!ht_cleanup_thread) { | |
4a15001e | 1536 | retval = -1; |
813ef6cb | 1537 | goto stop_threads; |
4a15001e MD |
1538 | } |
1539 | ||
ceed52b5 | 1540 | /* Create thread quit pipe */ |
51bb4dbb | 1541 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e | 1542 | retval = -1; |
813ef6cb | 1543 | goto stop_threads; |
fac6795d DG |
1544 | } |
1545 | ||
1546 | /* Check if daemon is UID = 0 */ | |
1547 | is_root = !getuid(); | |
fac6795d | 1548 | if (is_root) { |
67e40797 | 1549 | /* Create global run dir with root access */ |
67e40797 | 1550 | |
b3530820 JG |
1551 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
1552 | if (!kernel_channel_monitor_pipe) { | |
1553 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
1554 | retval = -1; | |
813ef6cb | 1555 | goto stop_threads; |
b3530820 JG |
1556 | } |
1557 | kconsumer_data.channel_monitor_pipe = | |
1558 | lttng_pipe_release_writefd( | |
1559 | kernel_channel_monitor_pipe); | |
1560 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
1561 | retval = -1; | |
813ef6cb | 1562 | goto stop_threads; |
b3530820 | 1563 | } |
fac6795d DG |
1564 | } |
1565 | ||
5c827ce0 DG |
1566 | /* Set consumer initial state */ |
1567 | kernel_consumerd_state = CONSUMER_STOPPED; | |
1568 | ust_consumerd_state = CONSUMER_STOPPED; | |
1569 | ||
b3530820 JG |
1570 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
1571 | if (!ust32_channel_monitor_pipe) { | |
1572 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
1573 | retval = -1; | |
813ef6cb | 1574 | goto stop_threads; |
b3530820 JG |
1575 | } |
1576 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1577 | ust32_channel_monitor_pipe); | |
1578 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
1579 | retval = -1; | |
813ef6cb | 1580 | goto stop_threads; |
b3530820 | 1581 | } |
62c43103 | 1582 | |
d086f507 | 1583 | /* |
82528808 JG |
1584 | * The rotation_thread_timer_queue structure is shared between the |
1585 | * sessiond timer thread and the rotation thread. The main thread keeps | |
1586 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 1587 | */ |
82528808 | 1588 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
1589 | if (!rotation_timer_queue) { |
1590 | retval = -1; | |
813ef6cb | 1591 | goto stop_threads; |
d086f507 | 1592 | } |
a5ab9e05 JG |
1593 | timer_thread_parameters.rotation_thread_job_queue = |
1594 | rotation_timer_queue; | |
67e40797 | 1595 | |
b3530820 JG |
1596 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
1597 | if (!ust64_channel_monitor_pipe) { | |
1598 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
1599 | retval = -1; | |
813ef6cb | 1600 | goto stop_threads; |
b3530820 JG |
1601 | } |
1602 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
1603 | ust64_channel_monitor_pipe); | |
1604 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
1605 | retval = -1; | |
813ef6cb | 1606 | goto stop_threads; |
b3530820 | 1607 | } |
847177cd | 1608 | |
1427f9b2 DG |
1609 | /* |
1610 | * Init UST app hash table. Alloc hash table before this point since | |
1611 | * cleanup() can get called after that point. | |
1612 | */ | |
4a15001e | 1613 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 1614 | ERR("Failed to allocate UST app hash table"); |
4a15001e | 1615 | retval = -1; |
813ef6cb | 1616 | goto stop_threads; |
4a15001e | 1617 | } |
1427f9b2 | 1618 | |
6a4e4039 JG |
1619 | /* |
1620 | * Initialize agent app hash table. We allocate the hash table here | |
1621 | * since cleanup() can get called after this point. | |
1622 | */ | |
1623 | if (agent_app_ht_alloc()) { | |
1624 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e | 1625 | retval = -1; |
813ef6cb | 1626 | goto stop_threads; |
f20baf8e DG |
1627 | } |
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; |
813ef6cb | 1638 | goto stop_threads; |
7753dea8 MD |
1639 | } |
1640 | ||
a88df331 | 1641 | /* Setup kernel tracer */ |
e6142f2e | 1642 | if (!config.no_kernel) { |
4fba7219 | 1643 | init_kernel_tracer(); |
89588270 DG |
1644 | if (kernel_tracer_fd >= 0) { |
1645 | ret = syscall_init_table(); | |
1646 | if (ret < 0) { | |
4a15001e MD |
1647 | ERR("Unable to populate syscall table. " |
1648 | "Syscall tracing won't work " | |
1649 | "for this session daemon."); | |
89588270 | 1650 | } |
834978fd | 1651 | } |
4fba7219 | 1652 | } |
a88df331 DG |
1653 | |
1654 | /* Set ulimit for open files */ | |
1655 | set_ulimit(); | |
fac6795d | 1656 | } |
4063050c MD |
1657 | /* init lttng_fd tracking must be done after set_ulimit. */ |
1658 | lttng_fd_init(); | |
fac6795d | 1659 | |
e6142f2e | 1660 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e | 1661 | retval = -1; |
813ef6cb | 1662 | goto stop_threads; |
67e40797 DG |
1663 | } |
1664 | ||
e6142f2e | 1665 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e | 1666 | retval = -1; |
813ef6cb | 1667 | goto stop_threads; |
67e40797 DG |
1668 | } |
1669 | ||
5b8719f5 | 1670 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 1671 | if (config.sig_parent) { |
5b8719f5 DG |
1672 | ppid = getppid(); |
1673 | } | |
1674 | ||
7a485870 | 1675 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 1676 | if (is_root && !config.no_kernel) { |
4a15001e MD |
1677 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
1678 | retval = -1; | |
813ef6cb | 1679 | goto stop_threads; |
6620da75 | 1680 | } |
7a485870 DG |
1681 | } |
1682 | ||
099e26bd | 1683 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
1684 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
1685 | retval = -1; | |
813ef6cb | 1686 | goto stop_threads; |
099e26bd DG |
1687 | } |
1688 | ||
d0b96690 | 1689 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
1690 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
1691 | retval = -1; | |
813ef6cb | 1692 | goto stop_threads; |
d0b96690 DG |
1693 | } |
1694 | ||
7972aab2 DG |
1695 | /* Initialize global buffer per UID and PID registry. */ |
1696 | buffer_reg_init_uid_registry(); | |
1697 | buffer_reg_init_pid_registry(); | |
1698 | ||
099e26bd | 1699 | /* Init UST command queue. */ |
8bdee6e2 | 1700 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1701 | |
2f77fc4b | 1702 | cmd_init(); |
00e2e675 | 1703 | |
ae9e45b3 DG |
1704 | /* Check for the application socket timeout env variable. */ |
1705 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
1706 | if (env_app_timeout) { | |
e6142f2e | 1707 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 1708 | } else { |
e6142f2e | 1709 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
1710 | } |
1711 | ||
4a15001e MD |
1712 | ret = write_pidfile(); |
1713 | if (ret) { | |
1714 | ERR("Error in write_pidfile"); | |
1715 | retval = -1; | |
813ef6cb | 1716 | goto stop_threads; |
4a15001e | 1717 | } |
35f90c40 | 1718 | |
554831e7 MD |
1719 | /* Initialize communication library */ |
1720 | lttcomm_init(); | |
4a15001e | 1721 | /* Initialize TCP timeout values */ |
d831c249 | 1722 | lttcomm_inet_init(); |
554831e7 | 1723 | |
12b4fb37 | 1724 | /* Create health-check thread. */ |
225221a8 | 1725 | if (!launch_health_management_thread()) { |
4a15001e | 1726 | retval = -1; |
813ef6cb | 1727 | goto stop_threads; |
44a5e5eb DG |
1728 | } |
1729 | ||
b3530820 JG |
1730 | /* notification_thread_data acquires the pipes' read side. */ |
1731 | notification_thread_handle = notification_thread_handle_create( | |
1732 | ust32_channel_monitor_pipe, | |
1733 | ust64_channel_monitor_pipe, | |
8898b0da | 1734 | kernel_channel_monitor_pipe); |
b3530820 JG |
1735 | if (!notification_thread_handle) { |
1736 | retval = -1; | |
1737 | ERR("Failed to create notification thread shared data"); | |
813ef6cb | 1738 | goto stop_threads; |
b3530820 JG |
1739 | } |
1740 | ||
1741 | /* Create notification thread. */ | |
4de27698 JG |
1742 | notification_thread = launch_notification_thread( |
1743 | notification_thread_handle); | |
1744 | if (!notification_thread) { | |
b3530820 | 1745 | retval = -1; |
813ef6cb | 1746 | goto stop_threads; |
b3530820 JG |
1747 | } |
1748 | ||
d086f507 | 1749 | /* Create timer thread. */ |
a5ab9e05 | 1750 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 1751 | retval = -1; |
813ef6cb | 1752 | goto stop_threads; |
d086f507 | 1753 | } |
d086f507 | 1754 | |
db66e574 JD |
1755 | /* rotation_thread_data acquires the pipes' read side. */ |
1756 | rotation_thread_handle = rotation_thread_handle_create( | |
90936dcf | 1757 | rotation_timer_queue, |
8898b0da | 1758 | notification_thread_handle); |
db66e574 JD |
1759 | if (!rotation_thread_handle) { |
1760 | retval = -1; | |
1761 | ERR("Failed to create rotation thread shared data"); | |
1762 | stop_threads(); | |
813ef6cb | 1763 | goto stop_threads; |
db66e574 | 1764 | } |
db66e574 JD |
1765 | |
1766 | /* Create rotation thread. */ | |
a430759b | 1767 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 1768 | retval = -1; |
813ef6cb | 1769 | goto stop_threads; |
db66e574 JD |
1770 | } |
1771 | ||
cf3af59e | 1772 | /* Create thread to manage the client socket */ |
050e613c JG |
1773 | client_thread = launch_client_thread(); |
1774 | if (!client_thread) { | |
4a15001e | 1775 | retval = -1; |
813ef6cb | 1776 | goto stop_threads; |
cf3af59e | 1777 | } |
fac6795d | 1778 | |
eaacb6d7 JG |
1779 | /* Set credentials of the client socket and rundir */ |
1780 | if (is_root && set_permissions(config.rundir.value)) { | |
1781 | retval = -1; | |
1782 | goto stop_threads; | |
1783 | } | |
1784 | ||
dd5875e7 JG |
1785 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], |
1786 | apps_cmd_notify_pipe[1])) { | |
4a15001e | 1787 | retval = -1; |
813ef6cb | 1788 | goto stop_threads; |
099e26bd DG |
1789 | } |
1790 | ||
1791 | /* Create thread to manage application registration. */ | |
143745a6 JG |
1792 | register_apps_thread = launch_application_registration_thread( |
1793 | &ust_cmd_queue); | |
1794 | if (!register_apps_thread) { | |
4a15001e | 1795 | retval = -1; |
813ef6cb | 1796 | goto stop_threads; |
099e26bd DG |
1797 | } |
1798 | ||
cf3af59e | 1799 | /* Create thread to manage application socket */ |
cdffb210 | 1800 | if (!launch_application_management_thread(apps_cmd_pipe[0])) { |
4a15001e | 1801 | retval = -1; |
813ef6cb | 1802 | goto stop_threads; |
d0b96690 DG |
1803 | } |
1804 | ||
1805 | /* Create thread to manage application notify socket */ | |
53c51aaa | 1806 | if (!launch_application_notification_thread(apps_cmd_notify_pipe[0])) { |
4a15001e | 1807 | retval = -1; |
813ef6cb | 1808 | goto stop_threads; |
cf3af59e | 1809 | } |
fac6795d | 1810 | |
7baf7871 JG |
1811 | /* Create agent management thread. */ |
1812 | if (!launch_agent_management_thread()) { | |
4a15001e | 1813 | retval = -1; |
813ef6cb | 1814 | goto stop_threads; |
4d076222 DG |
1815 | } |
1816 | ||
6620da75 | 1817 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 1818 | if (is_root && !config.no_kernel) { |
6620da75 | 1819 | /* Create kernel thread to manage kernel event */ |
45f6525f | 1820 | if (!launch_kernel_management_thread(kernel_poll_pipe[0])) { |
4a15001e | 1821 | retval = -1; |
813ef6cb | 1822 | goto stop_threads; |
6620da75 | 1823 | } |
ef367a93 | 1824 | } |
7a485870 | 1825 | |
51e3e495 JG |
1826 | /* Load sessions. */ |
1827 | ret = config_load_session(config.load_session_path.value, | |
1828 | NULL, 1, 1, NULL); | |
4a15001e | 1829 | if (ret) { |
51e3e495 | 1830 | ERR("Session load failed: %s", error_get_str(ret)); |
4a15001e | 1831 | retval = -1; |
813ef6cb | 1832 | goto stop_threads; |
4a15001e MD |
1833 | } |
1834 | ||
51e3e495 JG |
1835 | /* Initialization completed. */ |
1836 | sessiond_signal_parents(); | |
1837 | ||
4a15001e MD |
1838 | /* |
1839 | * This is where we start awaiting program completion (e.g. through | |
1840 | * signal that asks threads to teardown). | |
1841 | */ | |
1842 | ||
6af972a2 JG |
1843 | /* Initiate teardown once activity occurs on the quit pipe. */ |
1844 | sessiond_wait_for_quit_pipe(-1U); | |
050e613c | 1845 | |
813ef6cb | 1846 | stop_threads: |
050e613c JG |
1847 | /* |
1848 | * Ensure that the client thread is no longer accepting new commands, | |
1849 | * which could cause new sessions to be created. | |
1850 | */ | |
813ef6cb JG |
1851 | if (client_thread) { |
1852 | lttng_thread_shutdown(client_thread); | |
050e613c | 1853 | lttng_thread_put(client_thread); |
050e613c JG |
1854 | } |
1855 | ||
6af972a2 | 1856 | destroy_all_sessions_and_wait(); |
813ef6cb | 1857 | |
143745a6 JG |
1858 | if (register_apps_thread) { |
1859 | lttng_thread_shutdown(register_apps_thread); | |
1860 | lttng_thread_put(register_apps_thread); | |
1861 | } | |
548468b9 | 1862 | lttng_thread_list_shutdown_orphans(); |
050e613c | 1863 | |
4d62fbf8 MD |
1864 | /* |
1865 | * Wait for all pending call_rcu work to complete before tearing | |
1866 | * down data structures. call_rcu worker may be trying to | |
1867 | * perform lookups in those structures. | |
1868 | */ | |
1869 | rcu_barrier(); | |
4a15001e MD |
1870 | /* |
1871 | * sessiond_cleanup() is called when no other thread is running, except | |
1872 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
1873 | */ | |
1874 | rcu_thread_online(); | |
1875 | sessiond_cleanup(); | |
06f525de | 1876 | |
4de27698 JG |
1877 | if (notification_thread) { |
1878 | lttng_thread_shutdown(notification_thread); | |
1879 | lttng_thread_put(notification_thread); | |
1880 | } | |
1881 | ||
c4d5de9d JG |
1882 | /* |
1883 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
1884 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
1885 | * the queue is empty before shutting down the clean-up thread. | |
1886 | */ | |
1887 | rcu_barrier(); | |
1888 | ||
548468b9 JG |
1889 | if (ht_cleanup_thread) { |
1890 | lttng_thread_shutdown(ht_cleanup_thread); | |
1891 | lttng_thread_put(ht_cleanup_thread); | |
1892 | } | |
1893 | ||
a430759b JG |
1894 | rcu_thread_offline(); |
1895 | rcu_unregister_thread(); | |
1896 | ||
1897 | if (rotation_thread_handle) { | |
1898 | rotation_thread_handle_destroy(rotation_thread_handle); | |
1899 | } | |
1900 | ||
d086f507 JD |
1901 | /* |
1902 | * After the rotation and timer thread have quit, we can safely destroy | |
1903 | * the rotation_timer_queue. | |
1904 | */ | |
82528808 | 1905 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
8898b0da JG |
1906 | /* |
1907 | * The teardown of the notification system is performed after the | |
1908 | * session daemon's teardown in order to allow it to be notified | |
1909 | * of the active session and channels at the moment of the teardown. | |
1910 | */ | |
1911 | if (notification_thread_handle) { | |
1912 | notification_thread_handle_destroy(notification_thread_handle); | |
1913 | } | |
b3530820 JG |
1914 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
1915 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
1916 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
4a15001e | 1917 | |
4a15001e | 1918 | health_app_destroy(health_sessiond); |
7567352f | 1919 | exit_create_run_as_worker_cleanup: |
4a15001e | 1920 | exit_options: |
f472090a | 1921 | sessiond_cleanup_lock_file(); |
4a15001e MD |
1922 | sessiond_cleanup_options(); |
1923 | ||
1924 | exit_set_signal_handler: | |
1925 | if (!retval) { | |
cf3af59e | 1926 | exit(EXIT_SUCCESS); |
4a15001e MD |
1927 | } else { |
1928 | exit(EXIT_FAILURE); | |
67e40797 | 1929 | } |
fac6795d | 1930 | } |