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" |
d0b96690 | 72 | #include "ust-thread.h" |
022d91ba | 73 | #include "agent-thread.h" |
fb198a11 | 74 | #include "save.h" |
ef367a93 | 75 | #include "load-session-thread.h" |
b3530820 JG |
76 | #include "notification-thread.h" |
77 | #include "notification-thread-commands.h" | |
db66e574 | 78 | #include "rotation-thread.h" |
0dbc2034 | 79 | #include "lttng-syscall.h" |
7c1d2758 | 80 | #include "agent.h" |
5e97de00 | 81 | #include "ht-cleanup.h" |
e6142f2e | 82 | #include "sessiond-config.h" |
432b38d7 | 83 | #include "timer.h" |
548468b9 | 84 | #include "thread.h" |
050e613c | 85 | #include "client.h" |
dd5875e7 | 86 | #include "dispatch.h" |
22b80785 | 87 | #include "register.h" |
ebaeda94 | 88 | |
4fc83d94 PP |
89 | static const char *help_msg = |
90 | #ifdef LTTNG_EMBED_HELP | |
91 | #include <lttng-sessiond.8.h> | |
92 | #else | |
93 | NULL | |
94 | #endif | |
95 | ; | |
96 | ||
fac6795d | 97 | const char *progname; |
c9cb3e7d | 98 | static int lockfile_fd = -1; |
3bd1e081 | 99 | |
0bb7724a DG |
100 | /* Set to 1 when a SIGUSR1 signal is received. */ |
101 | static int recv_child_signal; | |
102 | ||
26296c48 JG |
103 | /* Command line options */ |
104 | static const struct option long_options[] = { | |
0f5ea17c JG |
105 | { "client-sock", required_argument, 0, 'c' }, |
106 | { "apps-sock", required_argument, 0, 'a' }, | |
107 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
108 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
109 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
110 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
111 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
112 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
113 | { "consumerd32-path", required_argument, 0, '\0' }, | |
114 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
115 | { "consumerd64-path", required_argument, 0, '\0' }, | |
116 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
117 | { "daemonize", no_argument, 0, 'd' }, | |
118 | { "background", no_argument, 0, 'b' }, | |
119 | { "sig-parent", no_argument, 0, 'S' }, | |
120 | { "help", no_argument, 0, 'h' }, | |
121 | { "group", required_argument, 0, 'g' }, | |
122 | { "version", no_argument, 0, 'V' }, | |
123 | { "quiet", no_argument, 0, 'q' }, | |
124 | { "verbose", no_argument, 0, 'v' }, | |
125 | { "verbose-consumer", no_argument, 0, '\0' }, | |
126 | { "no-kernel", no_argument, 0, '\0' }, | |
127 | { "pidfile", required_argument, 0, 'p' }, | |
128 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
129 | { "config", required_argument, 0, 'f' }, | |
130 | { "load", required_argument, 0, 'l' }, | |
131 | { "kmod-probes", required_argument, 0, '\0' }, | |
132 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
133 | { NULL, 0, 0, 0 } |
134 | }; | |
135 | ||
136 | /* Command line options to ignore from configuration file */ | |
137 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
1d4b027a | 138 | |
099e26bd DG |
139 | /* |
140 | * This pipe is used to inform the thread managing application communication | |
141 | * that a command is queued and ready to be processed. | |
142 | */ | |
76d7553f | 143 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 144 | |
1d4b027a | 145 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 146 | static pthread_t apps_thread; |
d0b96690 | 147 | static pthread_t apps_notify_thread; |
7a485870 | 148 | static pthread_t kernel_thread; |
022d91ba | 149 | static pthread_t agent_reg_thread; |
ef367a93 | 150 | static pthread_t load_session_thread; |
5eb91c98 | 151 | |
099e26bd DG |
152 | /* |
153 | * UST registration command queue. This queue is tied with a futex and uses a N | |
154 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
155 | * | |
b22c5da8 DG |
156 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
157 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
158 | * the line new application socket and monitors it for any I/O error or clean | |
159 | * close that triggers an unregistration of the application. | |
099e26bd DG |
160 | */ |
161 | static struct ust_cmd_queue ust_cmd_queue; | |
162 | ||
2f77fc4b DG |
163 | static const char *module_proc_lttng = "/proc/lttng"; |
164 | ||
ef367a93 | 165 | /* Load session thread information to operate. */ |
51bb4dbb | 166 | static struct load_session_thread_data *load_info; |
7c1d2758 | 167 | |
97bc1426 | 168 | /* |
51bb4dbb | 169 | * Section name to look for in the daemon configuration file. |
97bc1426 | 170 | */ |
51bb4dbb | 171 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 172 | |
51bb4dbb JG |
173 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
174 | static int is_root; | |
5eb91c98 | 175 | |
099e26bd DG |
176 | /* |
177 | * Stop all threads by closing the thread quit pipe. | |
178 | */ | |
cf3af59e MD |
179 | static void stop_threads(void) |
180 | { | |
5eb91c98 DG |
181 | int ret; |
182 | ||
cf3af59e MD |
183 | /* Stopping all threads */ |
184 | DBG("Terminating all threads"); | |
51bb4dbb | 185 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
186 | if (ret < 0) { |
187 | ERR("write error on thread quit pipe"); | |
188 | } | |
cf3af59e MD |
189 | } |
190 | ||
e975f9f8 DG |
191 | /* |
192 | * Close every consumer sockets. | |
193 | */ | |
194 | static void close_consumer_sockets(void) | |
195 | { | |
196 | int ret; | |
197 | ||
198 | if (kconsumer_data.err_sock >= 0) { | |
199 | ret = close(kconsumer_data.err_sock); | |
200 | if (ret < 0) { | |
201 | PERROR("kernel consumer err_sock close"); | |
202 | } | |
203 | } | |
204 | if (ustconsumer32_data.err_sock >= 0) { | |
205 | ret = close(ustconsumer32_data.err_sock); | |
206 | if (ret < 0) { | |
a76cbd9f | 207 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
208 | } |
209 | } | |
210 | if (ustconsumer64_data.err_sock >= 0) { | |
211 | ret = close(ustconsumer64_data.err_sock); | |
212 | if (ret < 0) { | |
a76cbd9f | 213 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
214 | } |
215 | } | |
216 | if (kconsumer_data.cmd_sock >= 0) { | |
217 | ret = close(kconsumer_data.cmd_sock); | |
218 | if (ret < 0) { | |
219 | PERROR("kernel consumer cmd_sock close"); | |
220 | } | |
221 | } | |
222 | if (ustconsumer32_data.cmd_sock >= 0) { | |
223 | ret = close(ustconsumer32_data.cmd_sock); | |
224 | if (ret < 0) { | |
a76cbd9f | 225 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
226 | } |
227 | } | |
228 | if (ustconsumer64_data.cmd_sock >= 0) { | |
229 | ret = close(ustconsumer64_data.cmd_sock); | |
230 | if (ret < 0) { | |
a76cbd9f | 231 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
232 | } |
233 | } | |
b3530820 JG |
234 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
235 | ret = close(kconsumer_data.channel_monitor_pipe); | |
236 | if (ret < 0) { | |
237 | PERROR("kernel consumer channel monitor pipe close"); | |
238 | } | |
239 | } | |
240 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
241 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
242 | if (ret < 0) { | |
243 | PERROR("UST consumerd32 channel monitor pipe close"); | |
244 | } | |
245 | } | |
246 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
247 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
248 | if (ret < 0) { | |
249 | PERROR("UST consumerd64 channel monitor pipe close"); | |
250 | } | |
251 | } | |
e975f9f8 DG |
252 | } |
253 | ||
4e4714cb JR |
254 | /* |
255 | * Wait on consumer process termination. | |
256 | * | |
257 | * Need to be called with the consumer data lock held or from a context | |
258 | * ensuring no concurrent access to data (e.g: cleanup). | |
259 | */ | |
260 | static void wait_consumer(struct consumer_data *consumer_data) | |
261 | { | |
262 | pid_t ret; | |
263 | int status; | |
264 | ||
265 | if (consumer_data->pid <= 0) { | |
266 | return; | |
267 | } | |
268 | ||
269 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
270 | consumer_data->pid); | |
271 | ret = waitpid(consumer_data->pid, &status, 0); | |
272 | if (ret == -1) { | |
273 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 274 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
275 | ERR("consumerd termination with error: %d", |
276 | WEXITSTATUS(ret)); | |
277 | } | |
278 | consumer_data->pid = 0; | |
279 | } | |
280 | ||
fac6795d | 281 | /* |
4a15001e | 282 | * Cleanup the session daemon's data structures. |
fac6795d | 283 | */ |
4a15001e | 284 | static void sessiond_cleanup(void) |
fac6795d | 285 | { |
ef599319 | 286 | int ret; |
48a86f68 | 287 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 288 | |
4a15001e | 289 | DBG("Cleanup sessiond"); |
e07ae692 | 290 | |
4e449f3f MD |
291 | /* |
292 | * Close the thread quit pipe. It has already done its job, | |
293 | * since we are now called. | |
294 | */ | |
51bb4dbb | 295 | sessiond_close_quit_pipe(); |
2f77fc4b | 296 | |
c9a2957d JG |
297 | ret = remove(config.pid_file_path.value); |
298 | if (ret < 0) { | |
299 | PERROR("remove pidfile %s", config.pid_file_path.value); | |
35f90c40 DG |
300 | } |
301 | ||
e6142f2e JG |
302 | DBG("Removing sessiond and consumerd content of directory %s", |
303 | config.rundir.value); | |
8c6c56c2 MD |
304 | |
305 | /* sessiond */ | |
e6142f2e JG |
306 | DBG("Removing %s", config.pid_file_path.value); |
307 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 308 | |
e6142f2e JG |
309 | DBG("Removing %s", config.agent_port_file_path.value); |
310 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 311 | |
8c6c56c2 | 312 | /* kconsumerd */ |
e6142f2e JG |
313 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
314 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
315 | ||
316 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
317 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
318 | |
319 | /* ust consumerd 32 */ | |
e6142f2e JG |
320 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
321 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
322 | ||
323 | DBG("Removing directory %s", config.consumerd32_path.value); | |
324 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
325 | |
326 | /* ust consumerd 64 */ | |
e6142f2e JG |
327 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
328 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
329 | ||
330 | DBG("Removing directory %s", config.consumerd64_path.value); | |
331 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 332 | |
6af972a2 | 333 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 334 | |
4e4714cb JR |
335 | wait_consumer(&kconsumer_data); |
336 | wait_consumer(&ustconsumer64_data); | |
337 | wait_consumer(&ustconsumer32_data); | |
338 | ||
6a4e4039 JG |
339 | DBG("Cleaning up all agent apps"); |
340 | agent_app_ht_clean(); | |
341 | ||
099e26bd | 342 | DBG("Closing all UST sockets"); |
56fff090 | 343 | ust_app_clean_list(); |
7972aab2 | 344 | buffer_reg_destroy_registries(); |
099e26bd | 345 | |
e6142f2e | 346 | if (is_root && !config.no_kernel) { |
4fba7219 | 347 | DBG2("Closing kernel fd"); |
a4b35e07 | 348 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
349 | ret = close(kernel_tracer_fd); |
350 | if (ret) { | |
351 | PERROR("close"); | |
352 | } | |
a4b35e07 | 353 | } |
2f50c8a3 | 354 | DBG("Unloading kernel modules"); |
096102bd | 355 | modprobe_remove_lttng_all(); |
834978fd | 356 | free(syscall_table); |
2f50c8a3 | 357 | } |
2f77fc4b | 358 | |
e975f9f8 DG |
359 | close_consumer_sockets(); |
360 | ||
ef367a93 JG |
361 | if (load_info) { |
362 | load_session_destroy_data(load_info); | |
363 | free(load_info); | |
364 | } | |
365 | ||
c9cb3e7d JG |
366 | /* |
367 | * We do NOT rmdir rundir because there are other processes | |
368 | * using it, for instance lttng-relayd, which can start in | |
369 | * parallel with this teardown. | |
370 | */ | |
4a15001e MD |
371 | } |
372 | ||
373 | /* | |
374 | * Cleanup the daemon's option data structures. | |
375 | */ | |
376 | static void sessiond_cleanup_options(void) | |
377 | { | |
378 | DBG("Cleaning up options"); | |
379 | ||
e6142f2e | 380 | sessiond_config_fini(&config); |
c9cb3e7d | 381 | |
7567352f | 382 | run_as_destroy_worker(); |
fac6795d DG |
383 | } |
384 | ||
7a485870 | 385 | /* |
5eb91c98 | 386 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 387 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 388 | */ |
5eb91c98 | 389 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 390 | { |
5eb91c98 | 391 | int ret; |
7a485870 | 392 | struct ltt_kernel_channel *channel; |
48a86f68 JG |
393 | struct ltt_session *session; |
394 | const struct ltt_session_list *session_list = session_get_list(); | |
7a485870 | 395 | |
5eb91c98 | 396 | DBG("Updating kernel poll set"); |
7a485870 | 397 | |
54d01ffb | 398 | session_lock_list(); |
48a86f68 JG |
399 | cds_list_for_each_entry(session, &session_list->head, list) { |
400 | if (!session_get(session)) { | |
401 | continue; | |
402 | } | |
54d01ffb | 403 | session_lock(session); |
7a485870 | 404 | if (session->kernel_session == NULL) { |
54d01ffb | 405 | session_unlock(session); |
48a86f68 | 406 | session_put(session); |
7a485870 DG |
407 | continue; |
408 | } | |
7a485870 | 409 | |
54d01ffb DG |
410 | cds_list_for_each_entry(channel, |
411 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
412 | /* Add channel fd to the kernel poll set */ |
413 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
414 | if (ret < 0) { | |
54d01ffb | 415 | session_unlock(session); |
48a86f68 | 416 | session_put(session); |
5eb91c98 DG |
417 | goto error; |
418 | } | |
419 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 420 | } |
54d01ffb | 421 | session_unlock(session); |
7a485870 | 422 | } |
54d01ffb | 423 | session_unlock_list(); |
7a485870 | 424 | |
5eb91c98 | 425 | return 0; |
7a485870 DG |
426 | |
427 | error: | |
54d01ffb | 428 | session_unlock_list(); |
7a485870 DG |
429 | return -1; |
430 | } | |
431 | ||
432 | /* | |
54d01ffb | 433 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 434 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 435 | * |
d063d709 | 436 | * Useful for CPU hotplug feature. |
7a485870 | 437 | */ |
7f032058 | 438 | static int update_kernel_stream(int fd) |
7a485870 DG |
439 | { |
440 | int ret = 0; | |
441 | struct ltt_session *session; | |
173af62f | 442 | struct ltt_kernel_session *ksess; |
7a485870 | 443 | struct ltt_kernel_channel *channel; |
48a86f68 | 444 | const struct ltt_session_list *session_list = session_get_list(); |
7a485870 DG |
445 | |
446 | DBG("Updating kernel streams for channel fd %d", fd); | |
447 | ||
54d01ffb | 448 | session_lock_list(); |
48a86f68 JG |
449 | cds_list_for_each_entry(session, &session_list->head, list) { |
450 | if (!session_get(session)) { | |
451 | continue; | |
452 | } | |
54d01ffb | 453 | session_lock(session); |
7a485870 | 454 | if (session->kernel_session == NULL) { |
54d01ffb | 455 | session_unlock(session); |
48a86f68 | 456 | session_put(session); |
7a485870 DG |
457 | continue; |
458 | } | |
173af62f | 459 | ksess = session->kernel_session; |
d9800920 | 460 | |
4a15001e MD |
461 | cds_list_for_each_entry(channel, |
462 | &ksess->channel_list.head, list) { | |
463 | struct lttng_ht_iter iter; | |
464 | struct consumer_socket *socket; | |
d9800920 | 465 | |
4a15001e MD |
466 | if (channel->fd != fd) { |
467 | continue; | |
468 | } | |
469 | DBG("Channel found, updating kernel streams"); | |
470 | ret = kernel_open_channel_stream(channel); | |
471 | if (ret < 0) { | |
472 | goto error; | |
473 | } | |
474 | /* Update the stream global counter */ | |
475 | ksess->stream_count_global += ret; | |
476 | ||
477 | /* | |
478 | * Have we already sent fds to the consumer? If yes, it | |
479 | * means that tracing is started so it is safe to send | |
480 | * our updated stream fds. | |
481 | */ | |
482 | if (ksess->consumer_fds_sent != 1 | |
483 | || ksess->consumer == NULL) { | |
484 | ret = -1; | |
485 | goto error; | |
486 | } | |
487 | ||
488 | rcu_read_lock(); | |
489 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
490 | &iter.iter, socket, node.node) { | |
491 | pthread_mutex_lock(socket->lock); | |
1fc1b7c8 | 492 | ret = kernel_consumer_send_channel_streams(socket, |
4a15001e MD |
493 | channel, ksess, |
494 | session->output_traces ? 1 : 0); | |
495 | pthread_mutex_unlock(socket->lock); | |
496 | if (ret < 0) { | |
e7fe706f | 497 | rcu_read_unlock(); |
4a15001e | 498 | goto error; |
7a485870 | 499 | } |
7a485870 | 500 | } |
4a15001e | 501 | rcu_read_unlock(); |
7a485870 | 502 | } |
54d01ffb | 503 | session_unlock(session); |
48a86f68 | 504 | session_put(session); |
7a485870 | 505 | } |
54d01ffb | 506 | session_unlock_list(); |
b3c750d2 | 507 | return ret; |
7a485870 | 508 | |
b3c750d2 | 509 | error: |
54d01ffb | 510 | session_unlock(session); |
48a86f68 | 511 | session_put(session); |
54d01ffb | 512 | session_unlock_list(); |
7a485870 DG |
513 | return ret; |
514 | } | |
515 | ||
516 | /* | |
d063d709 | 517 | * This thread manage event coming from the kernel. |
7a485870 | 518 | * |
d063d709 DG |
519 | * Features supported in this thread: |
520 | * -) CPU Hotplug | |
7a485870 DG |
521 | */ |
522 | static void *thread_manage_kernel(void *data) | |
523 | { | |
139ac872 | 524 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 525 | uint32_t revents, nb_fd; |
7a485870 | 526 | char tmp; |
5eb91c98 | 527 | struct lttng_poll_event events; |
7a485870 | 528 | |
6993eeb3 | 529 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 530 | |
6c71277b | 531 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 532 | |
d5d63bf1 DG |
533 | /* |
534 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 535 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 536 | */ |
6d737ce4 | 537 | lttng_poll_init(&events); |
d5d63bf1 | 538 | |
e547b070 | 539 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
540 | goto error_testpoint; |
541 | } | |
8ac94142 | 542 | |
840cb59c | 543 | health_code_update(); |
44a5e5eb | 544 | |
e547b070 | 545 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 546 | goto error_testpoint; |
6993eeb3 CB |
547 | } |
548 | ||
7a485870 | 549 | while (1) { |
840cb59c | 550 | health_code_update(); |
44a5e5eb | 551 | |
7a485870 | 552 | if (update_poll_flag == 1) { |
d21b0d71 DG |
553 | /* Clean events object. We are about to populate it again. */ |
554 | lttng_poll_clean(&events); | |
555 | ||
d0b96690 | 556 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
557 | if (ret < 0) { |
558 | goto error_poll_create; | |
559 | } | |
560 | ||
561 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
562 | if (ret < 0) { | |
563 | goto error; | |
564 | } | |
5f822d0a | 565 | |
d21b0d71 | 566 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
567 | ret = update_kernel_poll(&events); |
568 | if (ret < 0) { | |
7a485870 DG |
569 | goto error; |
570 | } | |
571 | update_poll_flag = 0; | |
572 | } | |
573 | ||
7fa2082e | 574 | DBG("Thread kernel polling"); |
7a485870 DG |
575 | |
576 | /* Poll infinite value of time */ | |
88f2b785 | 577 | restart: |
a78af745 | 578 | health_poll_entry(); |
5eb91c98 | 579 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
580 | DBG("Thread kernel return from poll on %d fds", |
581 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 582 | health_poll_exit(); |
7a485870 | 583 | if (ret < 0) { |
88f2b785 MD |
584 | /* |
585 | * Restart interrupted system call. | |
586 | */ | |
587 | if (errno == EINTR) { | |
588 | goto restart; | |
589 | } | |
7a485870 DG |
590 | goto error; |
591 | } else if (ret == 0) { | |
592 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
593 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
594 | "This should not have happened! Continuing..."); | |
7a485870 DG |
595 | continue; |
596 | } | |
597 | ||
0d9c5d77 DG |
598 | nb_fd = ret; |
599 | ||
5eb91c98 DG |
600 | for (i = 0; i < nb_fd; i++) { |
601 | /* Fetch once the poll data */ | |
602 | revents = LTTNG_POLL_GETEV(&events, i); | |
603 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 604 | |
840cb59c | 605 | health_code_update(); |
44a5e5eb | 606 | |
fd20dac9 MD |
607 | if (!revents) { |
608 | /* No activity for this FD (poll implementation). */ | |
609 | continue; | |
610 | } | |
611 | ||
5eb91c98 | 612 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 613 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 614 | if (ret) { |
139ac872 MD |
615 | err = 0; |
616 | goto exit; | |
5eb91c98 | 617 | } |
7a485870 | 618 | |
5eb91c98 | 619 | /* Check for data on kernel pipe */ |
03e43155 MD |
620 | if (revents & LPOLLIN) { |
621 | if (pollfd == kernel_poll_pipe[0]) { | |
622 | (void) lttng_read(kernel_poll_pipe[0], | |
623 | &tmp, 1); | |
624 | /* | |
625 | * Ret value is useless here, if this pipe gets any actions an | |
626 | * update is required anyway. | |
627 | */ | |
628 | update_poll_flag = 1; | |
629 | continue; | |
630 | } else { | |
631 | /* | |
632 | * New CPU detected by the kernel. Adding kernel stream to | |
633 | * kernel session and updating the kernel consumer | |
634 | */ | |
7f032058 | 635 | ret = update_kernel_stream(pollfd); |
5eb91c98 DG |
636 | if (ret < 0) { |
637 | continue; | |
638 | } | |
639 | break; | |
7a485870 | 640 | } |
03e43155 MD |
641 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
642 | update_poll_flag = 1; | |
643 | continue; | |
644 | } else { | |
645 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
646 | goto error; | |
7a485870 DG |
647 | } |
648 | } | |
649 | } | |
650 | ||
139ac872 | 651 | exit: |
7a485870 | 652 | error: |
5eb91c98 | 653 | lttng_poll_clean(&events); |
76d7553f | 654 | error_poll_create: |
6993eeb3 | 655 | error_testpoint: |
6620da75 DG |
656 | utils_close_pipe(kernel_poll_pipe); |
657 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 658 | if (err) { |
840cb59c | 659 | health_error(); |
139ac872 | 660 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
661 | WARN("Kernel thread died unexpectedly. " |
662 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 663 | } |
8782cc74 | 664 | health_unregister(health_sessiond); |
76d7553f | 665 | DBG("Kernel thread dying"); |
7a485870 DG |
666 | return NULL; |
667 | } | |
668 | ||
a23ec3a7 DG |
669 | /* |
670 | * Signal pthread condition of the consumer data that the thread. | |
671 | */ | |
672 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
673 | { | |
674 | pthread_mutex_lock(&data->cond_mutex); | |
675 | ||
676 | /* | |
677 | * The state is set before signaling. It can be any value, it's the waiter | |
678 | * job to correctly interpret this condition variable associated to the | |
679 | * consumer pthread_cond. | |
680 | * | |
681 | * A value of 0 means that the corresponding thread of the consumer data | |
682 | * was not started. 1 indicates that the thread has started and is ready | |
683 | * for action. A negative value means that there was an error during the | |
684 | * thread bootstrap. | |
685 | */ | |
686 | data->consumer_thread_is_ready = state; | |
687 | (void) pthread_cond_signal(&data->cond); | |
688 | ||
689 | pthread_mutex_unlock(&data->cond_mutex); | |
690 | } | |
691 | ||
1d4b027a | 692 | /* |
3bd1e081 | 693 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 694 | */ |
050e613c | 695 | void *thread_manage_consumer(void *data) |
1d4b027a | 696 | { |
42fc1d0b | 697 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 698 | uint32_t revents, nb_fd; |
1d4b027a | 699 | enum lttcomm_return_code code; |
5eb91c98 | 700 | struct lttng_poll_event events; |
3bd1e081 | 701 | struct consumer_data *consumer_data = data; |
b3530820 | 702 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 703 | |
3bd1e081 | 704 | DBG("[thread] Manage consumer started"); |
1d4b027a | 705 | |
34c1e15a MD |
706 | rcu_register_thread(); |
707 | rcu_thread_online(); | |
708 | ||
6c71277b | 709 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 710 | |
855060f8 | 711 | health_code_update(); |
9449cc75 | 712 | |
5eb91c98 | 713 | /* |
331744e3 JD |
714 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
715 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 716 | */ |
331744e3 | 717 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 718 | if (ret < 0) { |
76d7553f | 719 | goto error_poll; |
5eb91c98 | 720 | } |
273ea72c | 721 | |
edb8b045 DG |
722 | /* |
723 | * The error socket here is already in a listening state which was done | |
724 | * just before spawning this thread to avoid a race between the consumer | |
725 | * daemon exec trying to connect and the listen() call. | |
726 | */ | |
3bd1e081 | 727 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
728 | if (ret < 0) { |
729 | goto error; | |
730 | } | |
731 | ||
840cb59c | 732 | health_code_update(); |
44a5e5eb | 733 | |
331744e3 | 734 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 735 | restart: |
a78af745 | 736 | health_poll_entry(); |
8ac94142 | 737 | |
e547b070 | 738 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
739 | goto error; |
740 | } | |
8ac94142 | 741 | |
5eb91c98 | 742 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 743 | health_poll_exit(); |
273ea72c | 744 | if (ret < 0) { |
88f2b785 MD |
745 | /* |
746 | * Restart interrupted system call. | |
747 | */ | |
748 | if (errno == EINTR) { | |
749 | goto restart; | |
750 | } | |
273ea72c DG |
751 | goto error; |
752 | } | |
753 | ||
0d9c5d77 DG |
754 | nb_fd = ret; |
755 | ||
5eb91c98 DG |
756 | for (i = 0; i < nb_fd; i++) { |
757 | /* Fetch once the poll data */ | |
758 | revents = LTTNG_POLL_GETEV(&events, i); | |
759 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
760 | ||
840cb59c | 761 | health_code_update(); |
44a5e5eb | 762 | |
fd20dac9 MD |
763 | if (!revents) { |
764 | /* No activity for this FD (poll implementation). */ | |
765 | continue; | |
766 | } | |
767 | ||
5eb91c98 | 768 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 769 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 770 | if (ret) { |
139ac872 MD |
771 | err = 0; |
772 | goto exit; | |
5eb91c98 DG |
773 | } |
774 | ||
775 | /* Event on the registration socket */ | |
3bd1e081 | 776 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
777 | if (revents & LPOLLIN) { |
778 | continue; | |
779 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 780 | ERR("consumer err socket poll error"); |
5eb91c98 | 781 | goto error; |
03e43155 MD |
782 | } else { |
783 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
784 | goto error; | |
5eb91c98 DG |
785 | } |
786 | } | |
273ea72c DG |
787 | } |
788 | ||
3bd1e081 | 789 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
790 | if (sock < 0) { |
791 | goto error; | |
792 | } | |
793 | ||
b662582b DG |
794 | /* |
795 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
796 | * show must go on. | |
797 | */ | |
798 | (void) utils_set_fd_cloexec(sock); | |
799 | ||
840cb59c | 800 | health_code_update(); |
44a5e5eb | 801 | |
3bd1e081 | 802 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 803 | |
712ea556 | 804 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
805 | ret = lttcomm_recv_unix_sock(sock, &code, |
806 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
807 | if (ret <= 0) { |
808 | goto error; | |
809 | } | |
810 | ||
840cb59c | 811 | health_code_update(); |
b3530820 | 812 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 813 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
814 | lttcomm_get_readable_code(-code)); |
815 | goto error; | |
816 | } | |
817 | ||
b3530820 JG |
818 | /* Connect both command and metadata sockets. */ |
819 | consumer_data->cmd_sock = | |
820 | lttcomm_connect_unix_sock( | |
821 | consumer_data->cmd_unix_sock_path); | |
822 | consumer_data->metadata_fd = | |
823 | lttcomm_connect_unix_sock( | |
824 | consumer_data->cmd_unix_sock_path); | |
825 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
826 | PERROR("consumer connect cmd socket"); | |
827 | /* On error, signal condition and quit. */ | |
828 | signal_consumer_condition(consumer_data, -1); | |
829 | goto error; | |
830 | } | |
831 | ||
832 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
833 | ||
834 | /* Create metadata socket lock. */ | |
835 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
836 | if (consumer_data->metadata_sock.lock == NULL) { | |
837 | PERROR("zmalloc pthread mutex"); | |
838 | goto error; | |
839 | } | |
840 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
841 | ||
842 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
843 | DBG("Consumer metadata socket ready (fd: %d)", | |
844 | consumer_data->metadata_fd); | |
845 | ||
846 | /* | |
847 | * Remove the consumerd error sock since we've established a connection. | |
848 | */ | |
3bd1e081 | 849 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 850 | if (ret < 0) { |
72079cae DG |
851 | goto error; |
852 | } | |
853 | ||
331744e3 | 854 | /* Add new accepted error socket. */ |
5eb91c98 DG |
855 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
856 | if (ret < 0) { | |
72079cae | 857 | goto error; |
5eb91c98 DG |
858 | } |
859 | ||
331744e3 | 860 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 861 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
862 | LPOLLIN | LPOLLRDHUP); |
863 | if (ret < 0) { | |
864 | goto error; | |
865 | } | |
866 | ||
840cb59c | 867 | health_code_update(); |
44a5e5eb | 868 | |
b3530820 | 869 | /* |
62c43103 | 870 | * Transfer the write-end of the channel monitoring and rotate pipe |
82528808 | 871 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE command. |
b3530820 JG |
872 | */ |
873 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
874 | if (!cmd_socket_wrapper) { | |
875 | goto error; | |
876 | } | |
3e4dc117 | 877 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
878 | |
879 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
880 | consumer_data->channel_monitor_pipe); | |
881 | if (ret) { | |
882 | goto error; | |
883 | } | |
62c43103 | 884 | |
b3530820 JG |
885 | /* Discard the socket wrapper as it is no longer needed. */ |
886 | consumer_destroy_socket(cmd_socket_wrapper); | |
887 | cmd_socket_wrapper = NULL; | |
888 | ||
889 | /* The thread is completely initialized, signal that it is ready. */ | |
890 | signal_consumer_condition(consumer_data, 1); | |
891 | ||
331744e3 | 892 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 893 | restart_poll: |
331744e3 | 894 | while (1) { |
42fc1d0b DG |
895 | health_code_update(); |
896 | ||
897 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
898 | if (should_quit) { | |
899 | /* Not a health error. */ | |
900 | err = 0; | |
901 | goto exit; | |
902 | } | |
903 | ||
331744e3 JD |
904 | health_poll_entry(); |
905 | ret = lttng_poll_wait(&events, -1); | |
906 | health_poll_exit(); | |
907 | if (ret < 0) { | |
908 | /* | |
909 | * Restart interrupted system call. | |
910 | */ | |
911 | if (errno == EINTR) { | |
912 | goto restart_poll; | |
913 | } | |
914 | goto error; | |
88f2b785 | 915 | } |
72079cae | 916 | |
331744e3 | 917 | nb_fd = ret; |
0d9c5d77 | 918 | |
331744e3 JD |
919 | for (i = 0; i < nb_fd; i++) { |
920 | /* Fetch once the poll data */ | |
921 | revents = LTTNG_POLL_GETEV(&events, i); | |
922 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 923 | |
331744e3 | 924 | health_code_update(); |
44a5e5eb | 925 | |
fd20dac9 MD |
926 | if (!revents) { |
927 | /* No activity for this FD (poll implementation). */ | |
928 | continue; | |
929 | } | |
930 | ||
42fc1d0b DG |
931 | /* |
932 | * Thread quit pipe has been triggered, flag that we should stop | |
933 | * but continue the current loop to handle potential data from | |
934 | * consumer. | |
935 | */ | |
936 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 937 | |
331744e3 JD |
938 | if (pollfd == sock) { |
939 | /* Event on the consumerd socket */ | |
03e43155 MD |
940 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
941 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
942 | ERR("consumer err socket second poll error"); |
943 | goto error; | |
944 | } | |
945 | health_code_update(); | |
946 | /* Wait for any kconsumerd error */ | |
947 | ret = lttcomm_recv_unix_sock(sock, &code, | |
948 | sizeof(enum lttcomm_return_code)); | |
949 | if (ret <= 0) { | |
950 | ERR("consumer closed the command socket"); | |
951 | goto error; | |
952 | } | |
953 | ||
954 | ERR("consumer return code : %s", | |
955 | lttcomm_get_readable_code(-code)); | |
956 | ||
957 | goto exit; | |
4ce514c4 | 958 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
959 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
960 | && !(revents & LPOLLIN)) { | |
961 | ERR("consumer err metadata socket second poll error"); | |
962 | goto error; | |
963 | } | |
331744e3 JD |
964 | /* UST metadata requests */ |
965 | ret = ust_consumer_metadata_request( | |
966 | &consumer_data->metadata_sock); | |
967 | if (ret < 0) { | |
968 | ERR("Handling metadata request"); | |
969 | goto error; | |
970 | } | |
5eb91c98 | 971 | } |
42fc1d0b | 972 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 973 | } |
331744e3 | 974 | health_code_update(); |
5eb91c98 DG |
975 | } |
976 | ||
139ac872 | 977 | exit: |
1d4b027a | 978 | error: |
fdadac08 DG |
979 | /* |
980 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
981 | * thread might be using them so get exclusive access which will abort all |
982 | * other consumer command by other threads. | |
fdadac08 DG |
983 | */ |
984 | pthread_mutex_lock(&consumer_data->lock); | |
985 | ||
5c827ce0 DG |
986 | /* Immediately set the consumerd state to stopped */ |
987 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
988 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
989 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
990 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
991 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
992 | } else { | |
993 | /* Code flow error... */ | |
994 | assert(0); | |
995 | } | |
996 | ||
76d7553f MD |
997 | if (consumer_data->err_sock >= 0) { |
998 | ret = close(consumer_data->err_sock); | |
999 | if (ret) { | |
1000 | PERROR("close"); | |
1001 | } | |
a76cbd9f | 1002 | consumer_data->err_sock = -1; |
76d7553f MD |
1003 | } |
1004 | if (consumer_data->cmd_sock >= 0) { | |
1005 | ret = close(consumer_data->cmd_sock); | |
1006 | if (ret) { | |
1007 | PERROR("close"); | |
1008 | } | |
a76cbd9f | 1009 | consumer_data->cmd_sock = -1; |
76d7553f | 1010 | } |
96544455 SS |
1011 | if (consumer_data->metadata_sock.fd_ptr && |
1012 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1013 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1014 | if (ret) { |
1015 | PERROR("close"); | |
1016 | } | |
1017 | } | |
76d7553f MD |
1018 | if (sock >= 0) { |
1019 | ret = close(sock); | |
1020 | if (ret) { | |
1021 | PERROR("close"); | |
1022 | } | |
1023 | } | |
273ea72c | 1024 | |
3bd1e081 MD |
1025 | unlink(consumer_data->err_unix_sock_path); |
1026 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1027 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1028 | |
fdadac08 | 1029 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1030 | if (consumer_data->metadata_sock.lock) { |
1031 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1032 | free(consumer_data->metadata_sock.lock); | |
1033 | } | |
5eb91c98 | 1034 | lttng_poll_clean(&events); |
b3530820 JG |
1035 | |
1036 | if (cmd_socket_wrapper) { | |
1037 | consumer_destroy_socket(cmd_socket_wrapper); | |
1038 | } | |
76d7553f | 1039 | error_poll: |
139ac872 | 1040 | if (err) { |
840cb59c | 1041 | health_error(); |
139ac872 MD |
1042 | ERR("Health error occurred in %s", __func__); |
1043 | } | |
8782cc74 | 1044 | health_unregister(health_sessiond); |
76d7553f | 1045 | DBG("consumer thread cleanup completed"); |
0177d773 | 1046 | |
34c1e15a MD |
1047 | rcu_thread_offline(); |
1048 | rcu_unregister_thread(); | |
1049 | ||
5eb91c98 | 1050 | return NULL; |
099e26bd DG |
1051 | } |
1052 | ||
099e26bd | 1053 | /* |
81f04d5f JG |
1054 | * This thread receives application command sockets (FDs) on the |
1055 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1056 | * or an error occurs. | |
1057 | * | |
1058 | * At that point, it flushes the data (tracing and metadata) associated | |
1059 | * with this application and tears down ust app sessions and other | |
1060 | * associated data structures through ust_app_unregister(). | |
1061 | * | |
1062 | * Note that this thread never sends commands to the applications | |
1063 | * through the command sockets; it merely listens for hang-ups | |
1064 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1065 | */ |
1066 | static void *thread_manage_apps(void *data) | |
099e26bd | 1067 | { |
139ac872 | 1068 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1069 | ssize_t size_ret; |
5eb91c98 | 1070 | uint32_t revents, nb_fd; |
5eb91c98 | 1071 | struct lttng_poll_event events; |
099e26bd DG |
1072 | |
1073 | DBG("[thread] Manage application started"); | |
1074 | ||
f6a9efaa DG |
1075 | rcu_register_thread(); |
1076 | rcu_thread_online(); | |
1077 | ||
6c71277b | 1078 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1079 | |
e547b070 | 1080 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1081 | goto error_testpoint; |
1082 | } | |
1083 | ||
840cb59c | 1084 | health_code_update(); |
44a5e5eb | 1085 | |
d0b96690 | 1086 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1087 | if (ret < 0) { |
76d7553f | 1088 | goto error_poll_create; |
5eb91c98 | 1089 | } |
099e26bd | 1090 | |
5eb91c98 DG |
1091 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1092 | if (ret < 0) { | |
1093 | goto error; | |
1094 | } | |
099e26bd | 1095 | |
e547b070 | 1096 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1097 | goto error; |
1098 | } | |
8ac94142 | 1099 | |
840cb59c | 1100 | health_code_update(); |
44a5e5eb | 1101 | |
5eb91c98 | 1102 | while (1) { |
7fa2082e | 1103 | DBG("Apps thread polling"); |
099e26bd DG |
1104 | |
1105 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1106 | restart: |
a78af745 | 1107 | health_poll_entry(); |
5eb91c98 | 1108 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1109 | DBG("Apps thread return from poll on %d fds", |
1110 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1111 | health_poll_exit(); |
099e26bd | 1112 | if (ret < 0) { |
88f2b785 MD |
1113 | /* |
1114 | * Restart interrupted system call. | |
1115 | */ | |
1116 | if (errno == EINTR) { | |
1117 | goto restart; | |
1118 | } | |
099e26bd DG |
1119 | goto error; |
1120 | } | |
1121 | ||
0d9c5d77 DG |
1122 | nb_fd = ret; |
1123 | ||
5eb91c98 DG |
1124 | for (i = 0; i < nb_fd; i++) { |
1125 | /* Fetch once the poll data */ | |
1126 | revents = LTTNG_POLL_GETEV(&events, i); | |
1127 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1128 | ||
840cb59c | 1129 | health_code_update(); |
44a5e5eb | 1130 | |
fd20dac9 MD |
1131 | if (!revents) { |
1132 | /* No activity for this FD (poll implementation). */ | |
1133 | continue; | |
1134 | } | |
1135 | ||
5eb91c98 | 1136 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1137 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1138 | if (ret) { |
139ac872 MD |
1139 | err = 0; |
1140 | goto exit; | |
5eb91c98 | 1141 | } |
099e26bd | 1142 | |
5eb91c98 DG |
1143 | /* Inspect the apps cmd pipe */ |
1144 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1145 | if (revents & LPOLLIN) { |
d0b96690 DG |
1146 | int sock; |
1147 | ||
5eb91c98 | 1148 | /* Empty pipe */ |
6cd525e8 MD |
1149 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1150 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1151 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1152 | goto error; |
1153 | } | |
099e26bd | 1154 | |
840cb59c | 1155 | health_code_update(); |
44a5e5eb | 1156 | |
ffe60014 | 1157 | /* |
03e43155 MD |
1158 | * Since this is a command socket (write then read), |
1159 | * we only monitor the error events of the socket. | |
ffe60014 | 1160 | */ |
d0b96690 DG |
1161 | ret = lttng_poll_add(&events, sock, |
1162 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1163 | if (ret < 0) { | |
5eb91c98 | 1164 | goto error; |
e0c7ec2b | 1165 | } |
acc7b41b | 1166 | |
d0b96690 | 1167 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1168 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1169 | ERR("Apps command pipe error"); | |
1170 | goto error; | |
1171 | } else { | |
1172 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1173 | goto error; | |
0177d773 | 1174 | } |
5eb91c98 DG |
1175 | } else { |
1176 | /* | |
54d01ffb DG |
1177 | * At this point, we know that a registered application made |
1178 | * the event at poll_wait. | |
5eb91c98 DG |
1179 | */ |
1180 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1181 | /* Removing from the poll set */ | |
1182 | ret = lttng_poll_del(&events, pollfd); | |
1183 | if (ret < 0) { | |
1184 | goto error; | |
1185 | } | |
099e26bd | 1186 | |
b9d9b220 | 1187 | /* Socket closed on remote end. */ |
56fff090 | 1188 | ust_app_unregister(pollfd); |
03e43155 MD |
1189 | } else { |
1190 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1191 | goto error; | |
5eb91c98 | 1192 | } |
099e26bd | 1193 | } |
44a5e5eb | 1194 | |
840cb59c | 1195 | health_code_update(); |
099e26bd | 1196 | } |
099e26bd DG |
1197 | } |
1198 | ||
139ac872 | 1199 | exit: |
099e26bd | 1200 | error: |
5eb91c98 | 1201 | lttng_poll_clean(&events); |
76d7553f | 1202 | error_poll_create: |
6993eeb3 | 1203 | error_testpoint: |
6620da75 DG |
1204 | utils_close_pipe(apps_cmd_pipe); |
1205 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1206 | ||
1207 | /* | |
1208 | * We don't clean the UST app hash table here since already registered | |
1209 | * applications can still be controlled so let them be until the session | |
1210 | * daemon dies or the applications stop. | |
1211 | */ | |
1212 | ||
139ac872 | 1213 | if (err) { |
840cb59c | 1214 | health_error(); |
139ac872 MD |
1215 | ERR("Health error occurred in %s", __func__); |
1216 | } | |
8782cc74 | 1217 | health_unregister(health_sessiond); |
76d7553f | 1218 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1219 | rcu_thread_offline(); |
1220 | rcu_unregister_thread(); | |
099e26bd DG |
1221 | return NULL; |
1222 | } | |
1223 | ||
b73401da | 1224 | /* |
096102bd | 1225 | * Setup necessary data for kernel tracer action. |
b73401da | 1226 | */ |
096102bd | 1227 | static int init_kernel_tracer(void) |
b73401da DG |
1228 | { |
1229 | int ret; | |
b73401da | 1230 | |
096102bd DG |
1231 | /* Modprobe lttng kernel modules */ |
1232 | ret = modprobe_lttng_control(); | |
b73401da | 1233 | if (ret < 0) { |
b73401da DG |
1234 | goto error; |
1235 | } | |
1236 | ||
096102bd DG |
1237 | /* Open debugfs lttng */ |
1238 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1239 | if (kernel_tracer_fd < 0) { | |
1240 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 1241 | goto error_open; |
54d01ffb DG |
1242 | } |
1243 | ||
2f77fc4b | 1244 | /* Validate kernel version */ |
88076e89 JD |
1245 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
1246 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
1247 | if (ret < 0) { |
1248 | goto error_version; | |
b551a063 | 1249 | } |
54d01ffb | 1250 | |
2f77fc4b DG |
1251 | ret = modprobe_lttng_data(); |
1252 | if (ret < 0) { | |
1253 | goto error_modules; | |
54d01ffb DG |
1254 | } |
1255 | ||
6e21424e JR |
1256 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
1257 | kernel_tracer_fd); | |
1258 | if (ret < 0) { | |
1259 | goto error_modules; | |
1260 | } | |
1261 | ||
1262 | if (ret < 1) { | |
1263 | WARN("Kernel tracer does not support buffer monitoring. " | |
1264 | "The monitoring timer of channels in the kernel domain " | |
1265 | "will be set to 0 (disabled)."); | |
1266 | } | |
1267 | ||
2f77fc4b DG |
1268 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
1269 | return 0; | |
1270 | ||
1271 | error_version: | |
1272 | modprobe_remove_lttng_control(); | |
1273 | ret = close(kernel_tracer_fd); | |
1274 | if (ret) { | |
1275 | PERROR("close"); | |
b551a063 | 1276 | } |
2f77fc4b | 1277 | kernel_tracer_fd = -1; |
f73fabfd | 1278 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 1279 | |
2f77fc4b DG |
1280 | error_modules: |
1281 | ret = close(kernel_tracer_fd); | |
1282 | if (ret) { | |
1283 | PERROR("close"); | |
b551a063 | 1284 | } |
54d01ffb | 1285 | |
2f77fc4b DG |
1286 | error_open: |
1287 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
1288 | |
1289 | error: | |
2f77fc4b DG |
1290 | WARN("No kernel tracer available"); |
1291 | kernel_tracer_fd = -1; | |
1292 | if (!is_root) { | |
f73fabfd | 1293 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 1294 | } else { |
f73fabfd | 1295 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 1296 | } |
54d01ffb DG |
1297 | } |
1298 | ||
050e613c | 1299 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 1300 | { |
050e613c | 1301 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
1302 | } |
1303 | ||
00e2e675 | 1304 | /* |
050e613c JG |
1305 | * Take an option from the getopt output and set it in the right variable to be |
1306 | * used later. | |
36b588ed | 1307 | * |
050e613c | 1308 | * Return 0 on success else a negative value. |
00e2e675 | 1309 | */ |
050e613c | 1310 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 1311 | { |
050e613c | 1312 | int ret = 0; |
fac6795d | 1313 | |
c0232ea5 | 1314 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
1315 | if (!arg || *arg == '\0') { |
1316 | ret = -EINVAL; | |
1317 | goto end; | |
1318 | } | |
e8fa9fb0 MD |
1319 | if (lttng_is_setuid_setgid()) { |
1320 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1321 | "-c, --client-sock"); | |
1322 | } else { | |
e6142f2e JG |
1323 | config_string_set(&config.client_unix_sock_path, |
1324 | strdup(arg)); | |
1325 | if (!config.client_unix_sock_path.value) { | |
1326 | ret = -ENOMEM; | |
1327 | PERROR("strdup"); | |
1328 | } | |
e8fa9fb0 | 1329 | } |
c0232ea5 | 1330 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
1331 | if (!arg || *arg == '\0') { |
1332 | ret = -EINVAL; | |
1333 | goto end; | |
1334 | } | |
e8fa9fb0 MD |
1335 | if (lttng_is_setuid_setgid()) { |
1336 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1337 | "-a, --apps-sock"); | |
1338 | } else { | |
e6142f2e JG |
1339 | config_string_set(&config.apps_unix_sock_path, |
1340 | strdup(arg)); | |
1341 | if (!config.apps_unix_sock_path.value) { | |
1342 | ret = -ENOMEM; | |
1343 | PERROR("strdup"); | |
1344 | } | |
e8fa9fb0 | 1345 | } |
c0232ea5 | 1346 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 1347 | config.daemonize = true; |
c0232ea5 | 1348 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 1349 | config.background = true; |
c0232ea5 | 1350 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
1351 | if (!arg || *arg == '\0') { |
1352 | ret = -EINVAL; | |
1353 | goto end; | |
1354 | } | |
e8fa9fb0 MD |
1355 | if (lttng_is_setuid_setgid()) { |
1356 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1357 | "-g, --group"); | |
1358 | } else { | |
e6142f2e JG |
1359 | config_string_set(&config.tracing_group_name, |
1360 | strdup(arg)); | |
1361 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 1362 | ret = -ENOMEM; |
e6142f2e | 1363 | PERROR("strdup"); |
e8fa9fb0 | 1364 | } |
db322c4d | 1365 | } |
c0232ea5 | 1366 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 1367 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 1368 | if (ret) { |
4fc83d94 | 1369 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
1370 | perror("exec"); |
1371 | } | |
1372 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 1373 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
1374 | fprintf(stdout, "%s\n", VERSION); |
1375 | exit(EXIT_SUCCESS); | |
c0232ea5 | 1376 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 1377 | config.sig_parent = true; |
c0232ea5 | 1378 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
1379 | if (!arg || *arg == '\0') { |
1380 | ret = -EINVAL; | |
1381 | goto end; | |
1382 | } | |
e8fa9fb0 MD |
1383 | if (lttng_is_setuid_setgid()) { |
1384 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1385 | "--kconsumerd-err-sock"); | |
1386 | } else { | |
e6142f2e JG |
1387 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
1388 | strdup(arg)); | |
1389 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
1390 | ret = -ENOMEM; | |
1391 | PERROR("strdup"); | |
1392 | } | |
e8fa9fb0 | 1393 | } |
c0232ea5 | 1394 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
1395 | if (!arg || *arg == '\0') { |
1396 | ret = -EINVAL; | |
1397 | goto end; | |
1398 | } | |
e8fa9fb0 MD |
1399 | if (lttng_is_setuid_setgid()) { |
1400 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1401 | "--kconsumerd-cmd-sock"); | |
1402 | } else { | |
e6142f2e JG |
1403 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
1404 | strdup(arg)); | |
1405 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
1406 | ret = -ENOMEM; | |
1407 | PERROR("strdup"); | |
1408 | } | |
e8fa9fb0 | 1409 | } |
c0232ea5 | 1410 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
1411 | if (!arg || *arg == '\0') { |
1412 | ret = -EINVAL; | |
1413 | goto end; | |
1414 | } | |
e8fa9fb0 MD |
1415 | if (lttng_is_setuid_setgid()) { |
1416 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1417 | "--ustconsumerd64-err-sock"); | |
1418 | } else { | |
e6142f2e JG |
1419 | config_string_set(&config.consumerd64_err_unix_sock_path, |
1420 | strdup(arg)); | |
1421 | if (!config.consumerd64_err_unix_sock_path.value) { | |
1422 | ret = -ENOMEM; | |
1423 | PERROR("strdup"); | |
1424 | } | |
e8fa9fb0 | 1425 | } |
c0232ea5 | 1426 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
1427 | if (!arg || *arg == '\0') { |
1428 | ret = -EINVAL; | |
1429 | goto end; | |
1430 | } | |
e8fa9fb0 MD |
1431 | if (lttng_is_setuid_setgid()) { |
1432 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1433 | "--ustconsumerd64-cmd-sock"); | |
1434 | } else { | |
e6142f2e JG |
1435 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
1436 | strdup(arg)); | |
1437 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
1438 | ret = -ENOMEM; | |
1439 | PERROR("strdup"); | |
1440 | } | |
e8fa9fb0 | 1441 | } |
c0232ea5 | 1442 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
1443 | if (!arg || *arg == '\0') { |
1444 | ret = -EINVAL; | |
1445 | goto end; | |
1446 | } | |
e8fa9fb0 MD |
1447 | if (lttng_is_setuid_setgid()) { |
1448 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1449 | "--ustconsumerd32-err-sock"); | |
1450 | } else { | |
e6142f2e JG |
1451 | config_string_set(&config.consumerd32_err_unix_sock_path, |
1452 | strdup(arg)); | |
1453 | if (!config.consumerd32_err_unix_sock_path.value) { | |
1454 | ret = -ENOMEM; | |
1455 | PERROR("strdup"); | |
1456 | } | |
e8fa9fb0 | 1457 | } |
c0232ea5 | 1458 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
1459 | if (!arg || *arg == '\0') { |
1460 | ret = -EINVAL; | |
1461 | goto end; | |
1462 | } | |
e8fa9fb0 MD |
1463 | if (lttng_is_setuid_setgid()) { |
1464 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1465 | "--ustconsumerd32-cmd-sock"); | |
1466 | } else { | |
e6142f2e JG |
1467 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
1468 | strdup(arg)); | |
1469 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
1470 | ret = -ENOMEM; | |
1471 | PERROR("strdup"); | |
1472 | } | |
e8fa9fb0 | 1473 | } |
c0232ea5 | 1474 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 1475 | config.no_kernel = true; |
c0232ea5 | 1476 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 1477 | config.quiet = true; |
c0232ea5 | 1478 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
1479 | /* Verbose level can increase using multiple -v */ |
1480 | if (arg) { | |
13755a18 | 1481 | /* Value obtained from config file */ |
e6142f2e | 1482 | config.verbose = config_parse_value(arg); |
26296c48 | 1483 | } else { |
13755a18 | 1484 | /* -v used on command line */ |
e6142f2e | 1485 | config.verbose++; |
26296c48 | 1486 | } |
13755a18 | 1487 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
1488 | config.verbose = config.verbose < 0 ? 0 : |
1489 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 1490 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 1491 | if (arg) { |
e6142f2e | 1492 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 1493 | } else { |
e6142f2e | 1494 | config.verbose_consumer++; |
26296c48 | 1495 | } |
c0232ea5 | 1496 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
1497 | if (!arg || *arg == '\0') { |
1498 | ret = -EINVAL; | |
1499 | goto end; | |
1500 | } | |
e8fa9fb0 MD |
1501 | if (lttng_is_setuid_setgid()) { |
1502 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1503 | "--consumerd32-path"); | |
1504 | } else { | |
e6142f2e JG |
1505 | config_string_set(&config.consumerd32_bin_path, |
1506 | strdup(arg)); | |
1507 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
1508 | PERROR("strdup"); |
1509 | ret = -ENOMEM; | |
1510 | } | |
db322c4d | 1511 | } |
c0232ea5 | 1512 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
1513 | if (!arg || *arg == '\0') { |
1514 | ret = -EINVAL; | |
1515 | goto end; | |
1516 | } | |
e8fa9fb0 MD |
1517 | if (lttng_is_setuid_setgid()) { |
1518 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1519 | "--consumerd32-libdir"); | |
1520 | } else { | |
e6142f2e JG |
1521 | config_string_set(&config.consumerd32_lib_dir, |
1522 | strdup(arg)); | |
1523 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
1524 | PERROR("strdup"); |
1525 | ret = -ENOMEM; | |
1526 | } | |
db322c4d | 1527 | } |
c0232ea5 | 1528 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
1529 | if (!arg || *arg == '\0') { |
1530 | ret = -EINVAL; | |
1531 | goto end; | |
1532 | } | |
e8fa9fb0 MD |
1533 | if (lttng_is_setuid_setgid()) { |
1534 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1535 | "--consumerd64-path"); | |
1536 | } else { | |
e6142f2e JG |
1537 | config_string_set(&config.consumerd64_bin_path, |
1538 | strdup(arg)); | |
1539 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
1540 | PERROR("strdup"); |
1541 | ret = -ENOMEM; | |
1542 | } | |
db322c4d | 1543 | } |
c0232ea5 | 1544 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
1545 | if (!arg || *arg == '\0') { |
1546 | ret = -EINVAL; | |
1547 | goto end; | |
1548 | } | |
e8fa9fb0 MD |
1549 | if (lttng_is_setuid_setgid()) { |
1550 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1551 | "--consumerd64-libdir"); | |
1552 | } else { | |
e6142f2e JG |
1553 | config_string_set(&config.consumerd64_lib_dir, |
1554 | strdup(arg)); | |
1555 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
1556 | PERROR("strdup"); |
1557 | ret = -ENOMEM; | |
1558 | } | |
db322c4d | 1559 | } |
c0232ea5 | 1560 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
1561 | if (!arg || *arg == '\0') { |
1562 | ret = -EINVAL; | |
1563 | goto end; | |
1564 | } | |
e8fa9fb0 MD |
1565 | if (lttng_is_setuid_setgid()) { |
1566 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1567 | "-p, --pidfile"); | |
1568 | } else { | |
e6142f2e JG |
1569 | config_string_set(&config.pid_file_path, strdup(arg)); |
1570 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
1571 | PERROR("strdup"); |
1572 | ret = -ENOMEM; | |
1573 | } | |
db322c4d | 1574 | } |
c0232ea5 | 1575 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
1576 | if (!arg || *arg == '\0') { |
1577 | ret = -EINVAL; | |
1578 | goto end; | |
1579 | } | |
e8fa9fb0 MD |
1580 | if (lttng_is_setuid_setgid()) { |
1581 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1582 | "--agent-tcp-port"); | |
1583 | } else { | |
1584 | unsigned long v; | |
4d076222 | 1585 | |
e8fa9fb0 MD |
1586 | errno = 0; |
1587 | v = strtoul(arg, NULL, 0); | |
1588 | if (errno != 0 || !isdigit(arg[0])) { | |
1589 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
1590 | return -1; | |
1591 | } | |
1592 | if (v == 0 || v >= 65535) { | |
1593 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
1594 | return -1; | |
1595 | } | |
2288467f JG |
1596 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
1597 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 1598 | } |
c0232ea5 | 1599 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
1600 | if (!arg || *arg == '\0') { |
1601 | ret = -EINVAL; | |
1602 | goto end; | |
1603 | } | |
e8fa9fb0 MD |
1604 | if (lttng_is_setuid_setgid()) { |
1605 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1606 | "-l, --load"); | |
1607 | } else { | |
e6142f2e JG |
1608 | config_string_set(&config.load_session_path, strdup(arg)); |
1609 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
1610 | PERROR("strdup"); |
1611 | ret = -ENOMEM; | |
1612 | } | |
ef367a93 | 1613 | } |
c0232ea5 | 1614 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
1615 | if (!arg || *arg == '\0') { |
1616 | ret = -EINVAL; | |
1617 | goto end; | |
1618 | } | |
e8fa9fb0 MD |
1619 | if (lttng_is_setuid_setgid()) { |
1620 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1621 | "--kmod-probes"); | |
1622 | } else { | |
e6142f2e JG |
1623 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
1624 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
1625 | PERROR("strdup"); |
1626 | ret = -ENOMEM; | |
1627 | } | |
c9d42407 | 1628 | } |
c0232ea5 | 1629 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
1630 | if (!arg || *arg == '\0') { |
1631 | ret = -EINVAL; | |
1632 | goto end; | |
1633 | } | |
e8fa9fb0 MD |
1634 | if (lttng_is_setuid_setgid()) { |
1635 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1636 | "--extra-kmod-probes"); | |
1637 | } else { | |
e6142f2e JG |
1638 | config_string_set(&config.kmod_extra_probes_list, |
1639 | strdup(arg)); | |
1640 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
1641 | PERROR("strdup"); |
1642 | ret = -ENOMEM; | |
1643 | } | |
db322c4d | 1644 | } |
c0232ea5 JG |
1645 | } else if (string_match(optname, "config") || opt == 'f') { |
1646 | /* This is handled in set_options() thus silent skip. */ | |
1647 | goto end; | |
1648 | } else { | |
26296c48 JG |
1649 | /* Unknown option or other error. |
1650 | * Error is printed by getopt, just return */ | |
1651 | ret = -1; | |
1652 | } | |
1653 | ||
f3dd7ce7 | 1654 | end: |
c5d350b2 JG |
1655 | if (ret == -EINVAL) { |
1656 | const char *opt_name = "unknown"; | |
1657 | int i; | |
1658 | ||
1659 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
1660 | i++) { | |
1661 | if (opt == long_options[i].val) { | |
1662 | opt_name = long_options[i].name; | |
1663 | break; | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
1668 | opt_name); | |
1669 | } | |
f3dd7ce7 | 1670 | |
26296c48 JG |
1671 | return ret; |
1672 | } | |
1673 | ||
1674 | /* | |
1675 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 1676 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
1677 | * return value conventions. |
1678 | */ | |
1679 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
1680 | { | |
1681 | int ret = 0, i; | |
1682 | ||
1683 | if (!entry || !entry->name || !entry->value) { | |
1684 | ret = -EINVAL; | |
1685 | goto end; | |
1686 | } | |
1687 | ||
1688 | /* Check if the option is to be ignored */ | |
1689 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
1690 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
1691 | goto end; | |
1692 | } | |
1693 | } | |
1694 | ||
1695 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
1696 | i++) { | |
1697 | ||
1698 | /* Ignore if not fully matched. */ | |
1699 | if (strcmp(entry->name, long_options[i].name)) { | |
1700 | continue; | |
1701 | } | |
1702 | ||
1703 | /* | |
1704 | * If the option takes no argument on the command line, we have to | |
1705 | * check if the value is "true". We support non-zero numeric values, | |
1706 | * true, on and yes. | |
1707 | */ | |
1708 | if (!long_options[i].has_arg) { | |
1709 | ret = config_parse_value(entry->value); | |
1710 | if (ret <= 0) { | |
1711 | if (ret) { | |
1712 | WARN("Invalid configuration value \"%s\" for option %s", | |
1713 | entry->value, entry->name); | |
1714 | } | |
1715 | /* False, skip boolean config option. */ | |
1716 | goto end; | |
4d076222 | 1717 | } |
26296c48 JG |
1718 | } |
1719 | ||
1720 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
1721 | goto end; | |
1722 | } | |
1723 | ||
1724 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
1725 | ||
1726 | end: | |
1727 | return ret; | |
1728 | } | |
1729 | ||
1730 | /* | |
1731 | * daemon configuration loading and argument parsing | |
1732 | */ | |
1733 | static int set_options(int argc, char **argv) | |
1734 | { | |
1735 | int ret = 0, c = 0, option_index = 0; | |
1736 | int orig_optopt = optopt, orig_optind = optind; | |
1737 | char *optstring; | |
1738 | const char *config_path = NULL; | |
1739 | ||
1740 | optstring = utils_generate_optstring(long_options, | |
1741 | sizeof(long_options) / sizeof(struct option)); | |
1742 | if (!optstring) { | |
1743 | ret = -ENOMEM; | |
1744 | goto end; | |
1745 | } | |
1746 | ||
1747 | /* Check for the --config option */ | |
1748 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
1749 | &option_index)) != -1) { | |
1750 | if (c == '?') { | |
1751 | ret = -EINVAL; | |
1752 | goto end; | |
1753 | } else if (c != 'f') { | |
1754 | /* if not equal to --config option. */ | |
1755 | continue; | |
1756 | } | |
1757 | ||
e8fa9fb0 MD |
1758 | if (lttng_is_setuid_setgid()) { |
1759 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
1760 | "-f, --config"); | |
1761 | } else { | |
1762 | config_path = utils_expand_path(optarg); | |
1763 | if (!config_path) { | |
1764 | ERR("Failed to resolve path: %s", optarg); | |
1765 | } | |
26296c48 JG |
1766 | } |
1767 | } | |
1768 | ||
1769 | ret = config_get_section_entries(config_path, config_section_name, | |
1770 | config_entry_handler, NULL); | |
1771 | if (ret) { | |
1772 | if (ret > 0) { | |
1773 | ERR("Invalid configuration option at line %i", ret); | |
1774 | ret = -1; | |
1775 | } | |
1776 | goto end; | |
1777 | } | |
1778 | ||
1779 | /* Reset getopt's global state */ | |
1780 | optopt = orig_optopt; | |
1781 | optind = orig_optind; | |
1782 | while (1) { | |
c0232ea5 JG |
1783 | option_index = -1; |
1784 | /* | |
1785 | * getopt_long() will not set option_index if it encounters a | |
1786 | * short option. | |
1787 | */ | |
1788 | c = getopt_long(argc, argv, optstring, long_options, | |
1789 | &option_index); | |
26296c48 | 1790 | if (c == -1) { |
4d076222 DG |
1791 | break; |
1792 | } | |
26296c48 | 1793 | |
c0232ea5 JG |
1794 | /* |
1795 | * Pass NULL as the long option name if popt left the index | |
1796 | * unset. | |
1797 | */ | |
1798 | ret = set_option(c, optarg, | |
1799 | option_index < 0 ? NULL : | |
1800 | long_options[option_index].name); | |
26296c48 JG |
1801 | if (ret < 0) { |
1802 | break; | |
fac6795d DG |
1803 | } |
1804 | } | |
1805 | ||
26296c48 JG |
1806 | end: |
1807 | free(optstring); | |
1808 | return ret; | |
fac6795d DG |
1809 | } |
1810 | ||
f472090a JG |
1811 | /* |
1812 | * Create lockfile using the rundir and return its fd. | |
1813 | */ | |
1814 | static int create_lockfile(void) | |
1815 | { | |
1816 | return utils_create_lock_file(config.lock_file_path.value); | |
1817 | } | |
1818 | ||
fac6795d | 1819 | /* |
54d01ffb DG |
1820 | * Check if the global socket is available, and if a daemon is answering at the |
1821 | * other side. If yes, error is returned. | |
f472090a JG |
1822 | * |
1823 | * Also attempts to create and hold the lock file. | |
fac6795d | 1824 | */ |
cf3af59e | 1825 | static int check_existing_daemon(void) |
fac6795d | 1826 | { |
f472090a JG |
1827 | int ret = 0; |
1828 | ||
7d8234d9 | 1829 | /* Is there anybody out there ? */ |
099e26bd | 1830 | if (lttng_session_daemon_alive()) { |
f472090a JG |
1831 | ret = -EEXIST; |
1832 | goto end; | |
099e26bd | 1833 | } |
b09c7c76 | 1834 | |
f472090a JG |
1835 | lockfile_fd = create_lockfile(); |
1836 | if (lockfile_fd < 0) { | |
1837 | ret = -EEXIST; | |
1838 | goto end; | |
1839 | } | |
1840 | end: | |
1841 | return ret; | |
1842 | } | |
1843 | ||
1844 | static void sessiond_cleanup_lock_file(void) | |
1845 | { | |
1846 | int ret; | |
1847 | ||
1848 | /* | |
1849 | * Cleanup lock file by deleting it and finaly closing it which will | |
1850 | * release the file system lock. | |
1851 | */ | |
1852 | if (lockfile_fd >= 0) { | |
1853 | ret = remove(config.lock_file_path.value); | |
1854 | if (ret < 0) { | |
1855 | PERROR("remove lock file"); | |
1856 | } | |
1857 | ret = close(lockfile_fd); | |
1858 | if (ret < 0) { | |
1859 | PERROR("close lock file"); | |
1860 | } | |
1861 | } | |
fac6795d DG |
1862 | } |
1863 | ||
fac6795d | 1864 | /* |
d063d709 | 1865 | * Set the tracing group gid onto the client socket. |
5e16da05 | 1866 | * |
d063d709 | 1867 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 1868 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 1869 | */ |
be040666 | 1870 | static int set_permissions(char *rundir) |
fac6795d DG |
1871 | { |
1872 | int ret; | |
996b65c8 | 1873 | gid_t gid; |
fac6795d | 1874 | |
e6142f2e | 1875 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 1876 | |
d6f42150 | 1877 | /* Set lttng run dir */ |
be040666 | 1878 | ret = chown(rundir, 0, gid); |
d6f42150 | 1879 | if (ret < 0) { |
be040666 | 1880 | ERR("Unable to set group on %s", rundir); |
76d7553f | 1881 | PERROR("chown"); |
d6f42150 DG |
1882 | } |
1883 | ||
6c71277b MD |
1884 | /* |
1885 | * Ensure all applications and tracing group can search the run | |
1886 | * dir. Allow everyone to read the directory, since it does not | |
1887 | * buy us anything to hide its content. | |
1888 | */ | |
1889 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
1890 | if (ret < 0) { |
1891 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 1892 | PERROR("chmod"); |
d1613cf5 JN |
1893 | } |
1894 | ||
d6f42150 | 1895 | /* lttng client socket path */ |
e6142f2e | 1896 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 1897 | if (ret < 0) { |
e6142f2e | 1898 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 1899 | PERROR("chown"); |
d6f42150 DG |
1900 | } |
1901 | ||
3bd1e081 | 1902 | /* kconsumer error socket path */ |
6c71277b | 1903 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 1904 | if (ret < 0) { |
3bd1e081 | 1905 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 1906 | PERROR("chown"); |
3bd1e081 MD |
1907 | } |
1908 | ||
7753dea8 | 1909 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 1910 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
1911 | if (ret < 0) { |
1912 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 1913 | PERROR("chown"); |
7753dea8 MD |
1914 | } |
1915 | ||
1916 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 1917 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 1918 | if (ret < 0) { |
7753dea8 | 1919 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 1920 | PERROR("chown"); |
fac6795d DG |
1921 | } |
1922 | ||
d6f42150 | 1923 | DBG("All permissions are set"); |
e07ae692 | 1924 | |
fac6795d DG |
1925 | return ret; |
1926 | } | |
1927 | ||
d6f42150 | 1928 | /* |
d063d709 | 1929 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 1930 | */ |
e6142f2e | 1931 | static int create_lttng_rundir(void) |
d6f42150 DG |
1932 | { |
1933 | int ret; | |
1934 | ||
e6142f2e | 1935 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 1936 | |
e6142f2e | 1937 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 1938 | if (ret < 0) { |
b1f11e69 | 1939 | if (errno != EEXIST) { |
e6142f2e | 1940 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
1941 | goto error; |
1942 | } else { | |
1943 | ret = 0; | |
1944 | } | |
d6f42150 DG |
1945 | } |
1946 | ||
1947 | error: | |
1948 | return ret; | |
1949 | } | |
1950 | ||
1951 | /* | |
e6142f2e | 1952 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 1953 | * session daemon. |
d6f42150 | 1954 | */ |
e6142f2e | 1955 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
1956 | { |
1957 | int ret; | |
e6142f2e | 1958 | char *path = NULL; |
d6f42150 | 1959 | |
6c71277b | 1960 | switch (consumer_data->type) { |
7753dea8 | 1961 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 1962 | path = config.kconsumerd_path.value; |
7753dea8 MD |
1963 | break; |
1964 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 1965 | path = config.consumerd64_path.value; |
7753dea8 MD |
1966 | break; |
1967 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 1968 | path = config.consumerd32_path.value; |
7753dea8 MD |
1969 | break; |
1970 | default: | |
1971 | ERR("Consumer type unknown"); | |
1972 | ret = -EINVAL; | |
1973 | goto error; | |
d6f42150 | 1974 | } |
e6142f2e | 1975 | assert(path); |
d6f42150 | 1976 | |
67e40797 DG |
1977 | DBG2("Creating consumer directory: %s", path); |
1978 | ||
6c71277b | 1979 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
1980 | if (ret < 0 && errno != EEXIST) { |
1981 | PERROR("mkdir"); | |
1982 | ERR("Failed to create %s", path); | |
1983 | goto error; | |
d6f42150 | 1984 | } |
6c71277b | 1985 | if (is_root) { |
e6142f2e | 1986 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
1987 | if (ret < 0) { |
1988 | ERR("Unable to set group on %s", path); | |
1989 | PERROR("chown"); | |
1990 | goto error; | |
1991 | } | |
1992 | } | |
d6f42150 | 1993 | |
e6142f2e | 1994 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
1995 | consumer_data->err_sock = |
1996 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
1997 | if (consumer_data->err_sock < 0) { | |
1998 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
1999 | ret = -1; |
2000 | goto error; | |
2001 | } | |
2002 | ||
a24f05ab MD |
2003 | /* |
2004 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2005 | * show must go on. | |
2006 | */ | |
2007 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
2008 | if (ret < 0) { | |
2009 | PERROR("utils_set_fd_cloexec"); | |
2010 | /* continue anyway */ | |
2011 | } | |
2012 | ||
d6f42150 | 2013 | /* File permission MUST be 660 */ |
3bd1e081 | 2014 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 2015 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 2016 | if (ret < 0) { |
3bd1e081 | 2017 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 2018 | PERROR("chmod"); |
d6f42150 DG |
2019 | goto error; |
2020 | } | |
2021 | ||
2022 | error: | |
2023 | return ret; | |
2024 | } | |
2025 | ||
fac6795d | 2026 | /* |
d063d709 | 2027 | * Signal handler for the daemon |
cf3af59e | 2028 | * |
54d01ffb DG |
2029 | * Simply stop all worker threads, leaving main() return gracefully after |
2030 | * joining all threads and calling cleanup(). | |
fac6795d DG |
2031 | */ |
2032 | static void sighandler(int sig) | |
2033 | { | |
2034 | switch (sig) { | |
cf3af59e | 2035 | case SIGINT: |
af87c45a | 2036 | DBG("SIGINT caught"); |
cf3af59e MD |
2037 | stop_threads(); |
2038 | break; | |
2039 | case SIGTERM: | |
af87c45a | 2040 | DBG("SIGTERM caught"); |
cf3af59e MD |
2041 | stop_threads(); |
2042 | break; | |
0bb7724a DG |
2043 | case SIGUSR1: |
2044 | CMM_STORE_SHARED(recv_child_signal, 1); | |
2045 | break; | |
cf3af59e MD |
2046 | default: |
2047 | break; | |
fac6795d | 2048 | } |
fac6795d DG |
2049 | } |
2050 | ||
2051 | /* | |
d063d709 | 2052 | * Setup signal handler for : |
1d4b027a | 2053 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 2054 | */ |
1d4b027a | 2055 | static int set_signal_handler(void) |
fac6795d | 2056 | { |
1d4b027a DG |
2057 | int ret = 0; |
2058 | struct sigaction sa; | |
2059 | sigset_t sigset; | |
fac6795d | 2060 | |
1d4b027a | 2061 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 2062 | PERROR("sigemptyset"); |
1d4b027a DG |
2063 | return ret; |
2064 | } | |
d6f42150 | 2065 | |
1d4b027a DG |
2066 | sa.sa_mask = sigset; |
2067 | sa.sa_flags = 0; | |
0072e5e2 MD |
2068 | |
2069 | sa.sa_handler = sighandler; | |
1d4b027a | 2070 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 2071 | PERROR("sigaction"); |
1d4b027a | 2072 | return ret; |
d6f42150 DG |
2073 | } |
2074 | ||
1d4b027a | 2075 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 2076 | PERROR("sigaction"); |
1d4b027a | 2077 | return ret; |
d6f42150 | 2078 | } |
aaf26714 | 2079 | |
0072e5e2 | 2080 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 2081 | PERROR("sigaction"); |
1d4b027a | 2082 | return ret; |
8c0faa1d DG |
2083 | } |
2084 | ||
0072e5e2 MD |
2085 | sa.sa_handler = SIG_IGN; |
2086 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
2087 | PERROR("sigaction"); |
2088 | return ret; | |
2089 | } | |
2090 | ||
2091 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
2092 | |
2093 | return ret; | |
fac6795d DG |
2094 | } |
2095 | ||
f3ed775e | 2096 | /* |
d063d709 | 2097 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 2098 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
2099 | */ |
2100 | static void set_ulimit(void) | |
2101 | { | |
2102 | int ret; | |
2103 | struct rlimit lim; | |
2104 | ||
514bb9f0 | 2105 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
2106 | lim.rlim_cur = 65535; |
2107 | lim.rlim_max = 65535; | |
2108 | ||
2109 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
2110 | if (ret < 0) { | |
76d7553f | 2111 | PERROR("failed to set open files limit"); |
f3ed775e DG |
2112 | } |
2113 | } | |
2114 | ||
4a15001e | 2115 | static int write_pidfile(void) |
35f90c40 | 2116 | { |
e6142f2e | 2117 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
2118 | } |
2119 | ||
e6142f2e JG |
2120 | static int set_clock_plugin_env(void) |
2121 | { | |
2122 | int ret = 0; | |
2123 | char *env_value = NULL; | |
cd9290dd | 2124 | |
e6142f2e JG |
2125 | if (!config.lttng_ust_clock_plugin.value) { |
2126 | goto end; | |
2127 | } | |
2128 | ||
2129 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
2130 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 2131 | if (ret < 0) { |
e6142f2e JG |
2132 | PERROR("asprintf"); |
2133 | goto end; | |
cd9290dd DG |
2134 | } |
2135 | ||
e6142f2e JG |
2136 | ret = putenv(env_value); |
2137 | if (ret) { | |
2138 | free(env_value); | |
2139 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
2140 | goto end; | |
2141 | } | |
cd9290dd | 2142 | |
e6142f2e JG |
2143 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
2144 | config.lttng_ust_clock_plugin.value); | |
2145 | end: | |
4a15001e | 2146 | return ret; |
ef367a93 JG |
2147 | } |
2148 | ||
6af972a2 JG |
2149 | static void destroy_all_sessions_and_wait(void) |
2150 | { | |
2151 | struct ltt_session *session, *tmp; | |
2152 | struct ltt_session_list *session_list; | |
2153 | ||
2154 | session_list = session_get_list(); | |
2155 | DBG("Initiating destruction of all sessions"); | |
2156 | ||
2157 | if (!session_list) { | |
2158 | return; | |
2159 | } | |
2160 | ||
6af972a2 JG |
2161 | session_lock_list(); |
2162 | /* Initiate the destruction of all sessions. */ | |
2163 | cds_list_for_each_entry_safe(session, tmp, | |
2164 | &session_list->head, list) { | |
2165 | if (!session_get(session)) { | |
2166 | continue; | |
2167 | } | |
2168 | ||
2169 | session_lock(session); | |
2170 | if (session->destroyed) { | |
2171 | goto unlock_session; | |
2172 | } | |
2173 | (void) cmd_destroy_session(session, | |
2174 | notification_thread_handle); | |
2175 | unlock_session: | |
2176 | session_unlock(session); | |
2177 | session_put(session); | |
2178 | } | |
2179 | session_unlock_list(); | |
2180 | ||
2181 | /* Wait for the destruction of all sessions to complete. */ | |
2182 | DBG("Waiting for the destruction of all sessions to complete"); | |
2183 | session_list_wait_empty(); | |
2184 | DBG("Destruction of all sessions completed"); | |
2185 | } | |
2186 | ||
fac6795d DG |
2187 | /* |
2188 | * main | |
2189 | */ | |
2190 | int main(int argc, char **argv) | |
2191 | { | |
4a15001e | 2192 | int ret = 0, retval = 0; |
fac6795d | 2193 | void *status; |
e6142f2e | 2194 | const char *env_app_timeout; |
b3530820 JG |
2195 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
2196 | *ust64_channel_monitor_pipe = NULL, | |
2197 | *kernel_channel_monitor_pipe = NULL; | |
548468b9 | 2198 | struct lttng_thread *ht_cleanup_thread = NULL; |
a5ab9e05 | 2199 | struct timer_thread_parameters timer_thread_parameters; |
a430759b JG |
2200 | /* Rotation thread handle. */ |
2201 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
2202 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
2203 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
050e613c | 2204 | struct lttng_thread *client_thread = NULL; |
fac6795d | 2205 | |
335a95b7 MD |
2206 | init_kernel_workarounds(); |
2207 | ||
f6a9efaa DG |
2208 | rcu_register_thread(); |
2209 | ||
4a15001e MD |
2210 | if (set_signal_handler()) { |
2211 | retval = -1; | |
2212 | goto exit_set_signal_handler; | |
0bb7724a DG |
2213 | } |
2214 | ||
82528808 | 2215 | if (timer_signal_init()) { |
d086f507 JD |
2216 | retval = -1; |
2217 | goto exit_set_signal_handler; | |
2218 | } | |
2219 | ||
12744796 DG |
2220 | page_size = sysconf(_SC_PAGESIZE); |
2221 | if (page_size < 0) { | |
2222 | PERROR("sysconf _SC_PAGESIZE"); | |
2223 | page_size = LONG_MAX; | |
2224 | WARN("Fallback page size to %ld", page_size); | |
2225 | } | |
2226 | ||
e6142f2e JG |
2227 | ret = sessiond_config_init(&config); |
2228 | if (ret) { | |
2229 | retval = -1; | |
2230 | goto exit_set_signal_handler; | |
2231 | } | |
2232 | ||
2788b494 JR |
2233 | /* |
2234 | * Init config from environment variables. | |
2235 | * Command line option override env configuration per-doc. Do env first. | |
2236 | */ | |
2237 | sessiond_config_apply_env_config(&config); | |
2238 | ||
4a15001e MD |
2239 | /* |
2240 | * Parse arguments and load the daemon configuration file. | |
2241 | * | |
2242 | * We have an exit_options exit path to free memory reserved by | |
2243 | * set_options. This is needed because the rest of sessiond_cleanup() | |
2244 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
2245 | * depends on set_options. | |
2246 | */ | |
fac6795d | 2247 | progname = argv[0]; |
4a15001e MD |
2248 | if (set_options(argc, argv)) { |
2249 | retval = -1; | |
2250 | goto exit_options; | |
fac6795d DG |
2251 | } |
2252 | ||
e6142f2e JG |
2253 | /* |
2254 | * Resolve all paths received as arguments, configuration option, or | |
2255 | * through environment variable as absolute paths. This is necessary | |
2256 | * since daemonizing causes the sessiond's current working directory | |
2257 | * to '/'. | |
2258 | */ | |
2259 | ret = sessiond_config_resolve_paths(&config); | |
2260 | if (ret) { | |
2261 | goto exit_options; | |
2262 | } | |
2263 | ||
2264 | /* Apply config. */ | |
2265 | lttng_opt_verbose = config.verbose; | |
2266 | lttng_opt_quiet = config.quiet; | |
2267 | kconsumer_data.err_unix_sock_path = | |
2268 | config.kconsumerd_err_unix_sock_path.value; | |
2269 | kconsumer_data.cmd_unix_sock_path = | |
2270 | config.kconsumerd_cmd_unix_sock_path.value; | |
2271 | ustconsumer32_data.err_unix_sock_path = | |
2272 | config.consumerd32_err_unix_sock_path.value; | |
2273 | ustconsumer32_data.cmd_unix_sock_path = | |
2274 | config.consumerd32_cmd_unix_sock_path.value; | |
2275 | ustconsumer64_data.err_unix_sock_path = | |
2276 | config.consumerd64_err_unix_sock_path.value; | |
2277 | ustconsumer64_data.cmd_unix_sock_path = | |
2278 | config.consumerd64_cmd_unix_sock_path.value; | |
2279 | set_clock_plugin_env(); | |
2280 | ||
2281 | sessiond_config_log(&config); | |
2282 | ||
f472090a JG |
2283 | if (create_lttng_rundir()) { |
2284 | retval = -1; | |
2285 | goto exit_options; | |
2286 | } | |
2287 | ||
2288 | /* Abort launch if a session daemon is already running. */ | |
2289 | if (check_existing_daemon()) { | |
2290 | ERR("A session daemon is already running."); | |
2291 | retval = -1; | |
2292 | goto exit_options; | |
2293 | } | |
2294 | ||
fac6795d | 2295 | /* Daemonize */ |
e6142f2e | 2296 | if (config.daemonize || config.background) { |
ceed52b5 MD |
2297 | int i; |
2298 | ||
72dd7491 | 2299 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 2300 | !config.background); |
53094c05 | 2301 | if (ret < 0) { |
4a15001e MD |
2302 | retval = -1; |
2303 | goto exit_options; | |
53094c05 | 2304 | } |
0bb7724a | 2305 | |
ceed52b5 | 2306 | /* |
0bb7724a | 2307 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 2308 | * closed, in case we are called with more opened file |
f472090a | 2309 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
2310 | */ |
2311 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
2312 | if (i == lockfile_fd) { |
2313 | continue; | |
2314 | } | |
ceed52b5 MD |
2315 | (void) close(i); |
2316 | } | |
2317 | } | |
2318 | ||
7567352f MD |
2319 | if (run_as_create_worker(argv[0]) < 0) { |
2320 | goto exit_create_run_as_worker_cleanup; | |
2321 | } | |
2322 | ||
4a15001e MD |
2323 | /* |
2324 | * Starting from here, we can create threads. This needs to be after | |
2325 | * lttng_daemonize due to RCU. | |
2326 | */ | |
2327 | ||
2328 | /* | |
2329 | * Initialize the health check subsystem. This call should set the | |
2330 | * appropriate time values. | |
2331 | */ | |
2332 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
2333 | if (!health_sessiond) { | |
2334 | PERROR("health_app_create error"); | |
2335 | retval = -1; | |
2336 | goto exit_health_sessiond_cleanup; | |
2337 | } | |
2338 | ||
4a15001e | 2339 | /* Create thread to clean up RCU hash tables */ |
548468b9 JG |
2340 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
2341 | if (!ht_cleanup_thread) { | |
4a15001e MD |
2342 | retval = -1; |
2343 | goto exit_ht_cleanup; | |
2344 | } | |
2345 | ||
ceed52b5 | 2346 | /* Create thread quit pipe */ |
51bb4dbb | 2347 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e MD |
2348 | retval = -1; |
2349 | goto exit_init_data; | |
fac6795d DG |
2350 | } |
2351 | ||
2352 | /* Check if daemon is UID = 0 */ | |
2353 | is_root = !getuid(); | |
fac6795d | 2354 | if (is_root) { |
67e40797 | 2355 | /* Create global run dir with root access */ |
67e40797 | 2356 | |
b3530820 JG |
2357 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
2358 | if (!kernel_channel_monitor_pipe) { | |
2359 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
2360 | retval = -1; | |
2361 | goto exit_init_data; | |
2362 | } | |
2363 | kconsumer_data.channel_monitor_pipe = | |
2364 | lttng_pipe_release_writefd( | |
2365 | kernel_channel_monitor_pipe); | |
2366 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
2367 | retval = -1; | |
2368 | goto exit_init_data; | |
2369 | } | |
fac6795d DG |
2370 | } |
2371 | ||
5c827ce0 DG |
2372 | /* Set consumer initial state */ |
2373 | kernel_consumerd_state = CONSUMER_STOPPED; | |
2374 | ust_consumerd_state = CONSUMER_STOPPED; | |
2375 | ||
b3530820 JG |
2376 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
2377 | if (!ust32_channel_monitor_pipe) { | |
2378 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
2379 | retval = -1; | |
2380 | goto exit_init_data; | |
2381 | } | |
2382 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
2383 | ust32_channel_monitor_pipe); | |
2384 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
2385 | retval = -1; | |
2386 | goto exit_init_data; | |
2387 | } | |
62c43103 | 2388 | |
d086f507 | 2389 | /* |
82528808 JG |
2390 | * The rotation_thread_timer_queue structure is shared between the |
2391 | * sessiond timer thread and the rotation thread. The main thread keeps | |
2392 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 2393 | */ |
82528808 | 2394 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
2395 | if (!rotation_timer_queue) { |
2396 | retval = -1; | |
2397 | goto exit_init_data; | |
2398 | } | |
a5ab9e05 JG |
2399 | timer_thread_parameters.rotation_thread_job_queue = |
2400 | rotation_timer_queue; | |
67e40797 | 2401 | |
b3530820 JG |
2402 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
2403 | if (!ust64_channel_monitor_pipe) { | |
2404 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
2405 | retval = -1; | |
2406 | goto exit_init_data; | |
2407 | } | |
2408 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
2409 | ust64_channel_monitor_pipe); | |
2410 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
2411 | retval = -1; | |
2412 | goto exit_init_data; | |
2413 | } | |
847177cd | 2414 | |
1427f9b2 DG |
2415 | /* |
2416 | * Init UST app hash table. Alloc hash table before this point since | |
2417 | * cleanup() can get called after that point. | |
2418 | */ | |
4a15001e | 2419 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 2420 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
2421 | retval = -1; |
2422 | goto exit_init_data; | |
2423 | } | |
1427f9b2 | 2424 | |
6a4e4039 JG |
2425 | /* |
2426 | * Initialize agent app hash table. We allocate the hash table here | |
2427 | * since cleanup() can get called after this point. | |
2428 | */ | |
2429 | if (agent_app_ht_alloc()) { | |
2430 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
2431 | retval = -1; |
2432 | goto exit_init_data; | |
f20baf8e DG |
2433 | } |
2434 | ||
a88df331 DG |
2435 | /* |
2436 | * These actions must be executed as root. We do that *after* setting up | |
2437 | * the sockets path because we MUST make the check for another daemon using | |
2438 | * those paths *before* trying to set the kernel consumer sockets and init | |
2439 | * kernel tracer. | |
2440 | */ | |
2441 | if (is_root) { | |
e6142f2e | 2442 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
2443 | retval = -1; |
2444 | goto exit_init_data; | |
7753dea8 MD |
2445 | } |
2446 | ||
a88df331 | 2447 | /* Setup kernel tracer */ |
e6142f2e | 2448 | if (!config.no_kernel) { |
4fba7219 | 2449 | init_kernel_tracer(); |
89588270 DG |
2450 | if (kernel_tracer_fd >= 0) { |
2451 | ret = syscall_init_table(); | |
2452 | if (ret < 0) { | |
4a15001e MD |
2453 | ERR("Unable to populate syscall table. " |
2454 | "Syscall tracing won't work " | |
2455 | "for this session daemon."); | |
89588270 | 2456 | } |
834978fd | 2457 | } |
4fba7219 | 2458 | } |
a88df331 DG |
2459 | |
2460 | /* Set ulimit for open files */ | |
2461 | set_ulimit(); | |
fac6795d | 2462 | } |
4063050c MD |
2463 | /* init lttng_fd tracking must be done after set_ulimit. */ |
2464 | lttng_fd_init(); | |
fac6795d | 2465 | |
e6142f2e | 2466 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
2467 | retval = -1; |
2468 | goto exit_init_data; | |
67e40797 DG |
2469 | } |
2470 | ||
e6142f2e | 2471 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
2472 | retval = -1; |
2473 | goto exit_init_data; | |
67e40797 DG |
2474 | } |
2475 | ||
fac6795d | 2476 | /* Set credentials to socket */ |
e6142f2e | 2477 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
2478 | retval = -1; |
2479 | goto exit_init_data; | |
fac6795d DG |
2480 | } |
2481 | ||
5b8719f5 | 2482 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 2483 | if (config.sig_parent) { |
5b8719f5 DG |
2484 | ppid = getppid(); |
2485 | } | |
2486 | ||
7a485870 | 2487 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 2488 | if (is_root && !config.no_kernel) { |
4a15001e MD |
2489 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
2490 | retval = -1; | |
2491 | goto exit_init_data; | |
6620da75 | 2492 | } |
7a485870 DG |
2493 | } |
2494 | ||
099e26bd | 2495 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
2496 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
2497 | retval = -1; | |
2498 | goto exit_init_data; | |
099e26bd DG |
2499 | } |
2500 | ||
d0b96690 | 2501 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
2502 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
2503 | retval = -1; | |
2504 | goto exit_init_data; | |
d0b96690 DG |
2505 | } |
2506 | ||
7972aab2 DG |
2507 | /* Initialize global buffer per UID and PID registry. */ |
2508 | buffer_reg_init_uid_registry(); | |
2509 | buffer_reg_init_pid_registry(); | |
2510 | ||
099e26bd | 2511 | /* Init UST command queue. */ |
8bdee6e2 | 2512 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 2513 | |
2f77fc4b | 2514 | cmd_init(); |
00e2e675 | 2515 | |
ae9e45b3 DG |
2516 | /* Check for the application socket timeout env variable. */ |
2517 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
2518 | if (env_app_timeout) { | |
e6142f2e | 2519 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 2520 | } else { |
e6142f2e | 2521 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
2522 | } |
2523 | ||
4a15001e MD |
2524 | ret = write_pidfile(); |
2525 | if (ret) { | |
2526 | ERR("Error in write_pidfile"); | |
2527 | retval = -1; | |
2528 | goto exit_init_data; | |
2529 | } | |
35f90c40 | 2530 | |
554831e7 MD |
2531 | /* Initialize communication library */ |
2532 | lttcomm_init(); | |
4a15001e | 2533 | /* Initialize TCP timeout values */ |
d831c249 | 2534 | lttcomm_inet_init(); |
554831e7 | 2535 | |
ef367a93 | 2536 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
2537 | retval = -1; |
2538 | goto exit_init_data; | |
ef367a93 | 2539 | } |
e6142f2e | 2540 | load_info->path = config.load_session_path.value; |
ef367a93 | 2541 | |
12b4fb37 | 2542 | /* Create health-check thread. */ |
225221a8 | 2543 | if (!launch_health_management_thread()) { |
4a15001e | 2544 | retval = -1; |
44a5e5eb DG |
2545 | goto exit_health; |
2546 | } | |
2547 | ||
b3530820 JG |
2548 | /* notification_thread_data acquires the pipes' read side. */ |
2549 | notification_thread_handle = notification_thread_handle_create( | |
2550 | ust32_channel_monitor_pipe, | |
2551 | ust64_channel_monitor_pipe, | |
8898b0da | 2552 | kernel_channel_monitor_pipe); |
b3530820 JG |
2553 | if (!notification_thread_handle) { |
2554 | retval = -1; | |
2555 | ERR("Failed to create notification thread shared data"); | |
b3530820 JG |
2556 | goto exit_notification; |
2557 | } | |
2558 | ||
2559 | /* Create notification thread. */ | |
8898b0da | 2560 | if (!launch_notification_thread(notification_thread_handle)) { |
b3530820 | 2561 | retval = -1; |
b3530820 JG |
2562 | goto exit_notification; |
2563 | } | |
2564 | ||
d086f507 | 2565 | /* Create timer thread. */ |
a5ab9e05 | 2566 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 2567 | retval = -1; |
d086f507 JD |
2568 | goto exit_notification; |
2569 | } | |
d086f507 | 2570 | |
db66e574 JD |
2571 | /* rotation_thread_data acquires the pipes' read side. */ |
2572 | rotation_thread_handle = rotation_thread_handle_create( | |
90936dcf | 2573 | rotation_timer_queue, |
8898b0da | 2574 | notification_thread_handle); |
db66e574 JD |
2575 | if (!rotation_thread_handle) { |
2576 | retval = -1; | |
2577 | ERR("Failed to create rotation thread shared data"); | |
2578 | stop_threads(); | |
2579 | goto exit_rotation; | |
2580 | } | |
db66e574 JD |
2581 | |
2582 | /* Create rotation thread. */ | |
a430759b | 2583 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 2584 | retval = -1; |
db66e574 JD |
2585 | goto exit_rotation; |
2586 | } | |
2587 | ||
cf3af59e | 2588 | /* Create thread to manage the client socket */ |
050e613c JG |
2589 | client_thread = launch_client_thread(); |
2590 | if (!client_thread) { | |
4a15001e | 2591 | retval = -1; |
cf3af59e MD |
2592 | goto exit_client; |
2593 | } | |
fac6795d | 2594 | |
dd5875e7 JG |
2595 | if (!launch_ust_dispatch_thread(&ust_cmd_queue, apps_cmd_pipe[1], |
2596 | apps_cmd_notify_pipe[1])) { | |
4a15001e | 2597 | retval = -1; |
099e26bd DG |
2598 | goto exit_dispatch; |
2599 | } | |
2600 | ||
2601 | /* Create thread to manage application registration. */ | |
22b80785 | 2602 | if (!launch_application_registration_thread(&ust_cmd_queue)) { |
4a15001e | 2603 | retval = -1; |
099e26bd DG |
2604 | goto exit_reg_apps; |
2605 | } | |
2606 | ||
cf3af59e | 2607 | /* Create thread to manage application socket */ |
1a1a34b4 | 2608 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 2609 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
2610 | if (ret) { |
2611 | errno = ret; | |
d0b96690 | 2612 | PERROR("pthread_create apps"); |
4a15001e | 2613 | retval = -1; |
b3530820 | 2614 | stop_threads(); |
d0b96690 DG |
2615 | goto exit_apps; |
2616 | } | |
2617 | ||
2618 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 2619 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 2620 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
2621 | if (ret) { |
2622 | errno = ret; | |
f5c32ef1 | 2623 | PERROR("pthread_create notify"); |
4a15001e | 2624 | retval = -1; |
b3530820 | 2625 | stop_threads(); |
9563b0ad | 2626 | goto exit_apps_notify; |
cf3af59e | 2627 | } |
fac6795d | 2628 | |
022d91ba | 2629 | /* Create agent registration thread. */ |
1a1a34b4 | 2630 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 2631 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
2632 | if (ret) { |
2633 | errno = ret; | |
022d91ba | 2634 | PERROR("pthread_create agent"); |
4a15001e | 2635 | retval = -1; |
b3530820 | 2636 | stop_threads(); |
022d91ba | 2637 | goto exit_agent_reg; |
4d076222 DG |
2638 | } |
2639 | ||
6620da75 | 2640 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 2641 | if (is_root && !config.no_kernel) { |
6620da75 | 2642 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 2643 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 2644 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
2645 | if (ret) { |
2646 | errno = ret; | |
6620da75 | 2647 | PERROR("pthread_create kernel"); |
4a15001e | 2648 | retval = -1; |
b3530820 | 2649 | stop_threads(); |
6620da75 DG |
2650 | goto exit_kernel; |
2651 | } | |
ef367a93 | 2652 | } |
7a485870 | 2653 | |
4a15001e | 2654 | /* Create session loading thread. */ |
1a1a34b4 MJ |
2655 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
2656 | thread_load_session, load_info); | |
4a15001e MD |
2657 | if (ret) { |
2658 | errno = ret; | |
2659 | PERROR("pthread_create load_session_thread"); | |
2660 | retval = -1; | |
b3530820 | 2661 | stop_threads(); |
4a15001e MD |
2662 | goto exit_load_session; |
2663 | } | |
2664 | ||
2665 | /* | |
2666 | * This is where we start awaiting program completion (e.g. through | |
2667 | * signal that asks threads to teardown). | |
2668 | */ | |
2669 | ||
2670 | ret = pthread_join(load_session_thread, &status); | |
2671 | if (ret) { | |
2672 | errno = ret; | |
2673 | PERROR("pthread_join load_session_thread"); | |
2674 | retval = -1; | |
2675 | } | |
6af972a2 JG |
2676 | |
2677 | /* Initiate teardown once activity occurs on the quit pipe. */ | |
2678 | sessiond_wait_for_quit_pipe(-1U); | |
050e613c JG |
2679 | |
2680 | /* | |
2681 | * Ensure that the client thread is no longer accepting new commands, | |
2682 | * which could cause new sessions to be created. | |
2683 | */ | |
2684 | if (!lttng_thread_shutdown(client_thread)) { | |
2685 | ERR("Failed to shutdown the client thread, continuing teardown"); | |
2686 | lttng_thread_put(client_thread); | |
2687 | client_thread = NULL; | |
2688 | } | |
2689 | ||
6af972a2 | 2690 | destroy_all_sessions_and_wait(); |
4a15001e | 2691 | exit_load_session: |
ef367a93 | 2692 | |
e6142f2e | 2693 | if (is_root && !config.no_kernel) { |
6620da75 | 2694 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
2695 | if (ret) { |
2696 | errno = ret; | |
6620da75 | 2697 | PERROR("pthread_join"); |
4a15001e | 2698 | retval = -1; |
6620da75 | 2699 | } |
fac6795d | 2700 | } |
cf3af59e | 2701 | exit_kernel: |
4a15001e | 2702 | |
022d91ba | 2703 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
2704 | if (ret) { |
2705 | errno = ret; | |
022d91ba | 2706 | PERROR("pthread_join agent"); |
4a15001e | 2707 | retval = -1; |
4d076222 | 2708 | } |
022d91ba | 2709 | exit_agent_reg: |
4a15001e | 2710 | |
9563b0ad | 2711 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
2712 | if (ret) { |
2713 | errno = ret; | |
9563b0ad | 2714 | PERROR("pthread_join apps notify"); |
4a15001e | 2715 | retval = -1; |
9563b0ad | 2716 | } |
9563b0ad | 2717 | exit_apps_notify: |
4a15001e | 2718 | |
cf3af59e | 2719 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
2720 | if (ret) { |
2721 | errno = ret; | |
9563b0ad | 2722 | PERROR("pthread_join apps"); |
4a15001e | 2723 | retval = -1; |
cf3af59e | 2724 | } |
cf3af59e | 2725 | exit_apps: |
099e26bd | 2726 | exit_reg_apps: |
099e26bd | 2727 | exit_dispatch: |
b3530820 | 2728 | exit_client: |
db66e574 | 2729 | exit_rotation: |
b3530820 | 2730 | exit_notification: |
548468b9 | 2731 | lttng_thread_list_shutdown_orphans(); |
b3530820 | 2732 | exit_health: |
4a15001e | 2733 | exit_init_data: |
050e613c JG |
2734 | if (client_thread) { |
2735 | lttng_thread_put(client_thread); | |
2736 | } | |
2737 | ||
4d62fbf8 MD |
2738 | /* |
2739 | * Wait for all pending call_rcu work to complete before tearing | |
2740 | * down data structures. call_rcu worker may be trying to | |
2741 | * perform lookups in those structures. | |
2742 | */ | |
2743 | rcu_barrier(); | |
4a15001e MD |
2744 | /* |
2745 | * sessiond_cleanup() is called when no other thread is running, except | |
2746 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
2747 | */ | |
2748 | rcu_thread_online(); | |
2749 | sessiond_cleanup(); | |
06f525de | 2750 | |
c4d5de9d JG |
2751 | /* |
2752 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
2753 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
2754 | * the queue is empty before shutting down the clean-up thread. | |
2755 | */ | |
2756 | rcu_barrier(); | |
2757 | ||
548468b9 JG |
2758 | if (ht_cleanup_thread) { |
2759 | lttng_thread_shutdown(ht_cleanup_thread); | |
2760 | lttng_thread_put(ht_cleanup_thread); | |
2761 | } | |
2762 | ||
a430759b JG |
2763 | rcu_thread_offline(); |
2764 | rcu_unregister_thread(); | |
2765 | ||
2766 | if (rotation_thread_handle) { | |
2767 | rotation_thread_handle_destroy(rotation_thread_handle); | |
2768 | } | |
2769 | ||
d086f507 JD |
2770 | /* |
2771 | * After the rotation and timer thread have quit, we can safely destroy | |
2772 | * the rotation_timer_queue. | |
2773 | */ | |
82528808 | 2774 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
8898b0da JG |
2775 | /* |
2776 | * The teardown of the notification system is performed after the | |
2777 | * session daemon's teardown in order to allow it to be notified | |
2778 | * of the active session and channels at the moment of the teardown. | |
2779 | */ | |
2780 | if (notification_thread_handle) { | |
2781 | notification_thread_handle_destroy(notification_thread_handle); | |
2782 | } | |
b3530820 JG |
2783 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
2784 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
2785 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
0b2dc8df | 2786 | exit_ht_cleanup: |
4a15001e | 2787 | |
4a15001e MD |
2788 | health_app_destroy(health_sessiond); |
2789 | exit_health_sessiond_cleanup: | |
7567352f | 2790 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
2791 | |
2792 | exit_options: | |
f472090a | 2793 | sessiond_cleanup_lock_file(); |
4a15001e MD |
2794 | sessiond_cleanup_options(); |
2795 | ||
2796 | exit_set_signal_handler: | |
2797 | if (!retval) { | |
cf3af59e | 2798 | exit(EXIT_SUCCESS); |
4a15001e MD |
2799 | } else { |
2800 | exit(EXIT_FAILURE); | |
67e40797 | 2801 | } |
fac6795d | 2802 | } |