Commit | Line | Data |
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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" |
ebaeda94 | 86 | |
4fc83d94 PP |
87 | static const char *help_msg = |
88 | #ifdef LTTNG_EMBED_HELP | |
89 | #include <lttng-sessiond.8.h> | |
90 | #else | |
91 | NULL | |
92 | #endif | |
93 | ; | |
94 | ||
fac6795d | 95 | const char *progname; |
c9cb3e7d | 96 | static int lockfile_fd = -1; |
3bd1e081 | 97 | |
0bb7724a DG |
98 | /* Set to 1 when a SIGUSR1 signal is received. */ |
99 | static int recv_child_signal; | |
100 | ||
26296c48 JG |
101 | /* Command line options */ |
102 | static const struct option long_options[] = { | |
0f5ea17c JG |
103 | { "client-sock", required_argument, 0, 'c' }, |
104 | { "apps-sock", required_argument, 0, 'a' }, | |
105 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
106 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
107 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
108 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
109 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
110 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
111 | { "consumerd32-path", required_argument, 0, '\0' }, | |
112 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
113 | { "consumerd64-path", required_argument, 0, '\0' }, | |
114 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
115 | { "daemonize", no_argument, 0, 'd' }, | |
116 | { "background", no_argument, 0, 'b' }, | |
117 | { "sig-parent", no_argument, 0, 'S' }, | |
118 | { "help", no_argument, 0, 'h' }, | |
119 | { "group", required_argument, 0, 'g' }, | |
120 | { "version", no_argument, 0, 'V' }, | |
121 | { "quiet", no_argument, 0, 'q' }, | |
122 | { "verbose", no_argument, 0, 'v' }, | |
123 | { "verbose-consumer", no_argument, 0, '\0' }, | |
124 | { "no-kernel", no_argument, 0, '\0' }, | |
125 | { "pidfile", required_argument, 0, 'p' }, | |
126 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
127 | { "config", required_argument, 0, 'f' }, | |
128 | { "load", required_argument, 0, 'l' }, | |
129 | { "kmod-probes", required_argument, 0, '\0' }, | |
130 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
131 | { NULL, 0, 0, 0 } |
132 | }; | |
133 | ||
134 | /* Command line options to ignore from configuration file */ | |
135 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
136 | ||
26c9d55e | 137 | /* Shared between threads */ |
099e26bd | 138 | static int dispatch_thread_exit; |
fac6795d | 139 | |
a4b35e07 | 140 | static int apps_sock = -1; |
1d4b027a | 141 | |
099e26bd DG |
142 | /* |
143 | * This pipe is used to inform the thread managing application communication | |
144 | * that a command is queued and ready to be processed. | |
145 | */ | |
76d7553f | 146 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 147 | |
1d4b027a | 148 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 149 | static pthread_t apps_thread; |
d0b96690 | 150 | static pthread_t apps_notify_thread; |
099e26bd | 151 | static pthread_t reg_apps_thread; |
7a485870 | 152 | static pthread_t kernel_thread; |
099e26bd | 153 | static pthread_t dispatch_thread; |
022d91ba | 154 | static pthread_t agent_reg_thread; |
ef367a93 | 155 | static pthread_t load_session_thread; |
5eb91c98 | 156 | |
099e26bd DG |
157 | /* |
158 | * UST registration command queue. This queue is tied with a futex and uses a N | |
159 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
160 | * | |
b22c5da8 DG |
161 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
162 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
163 | * the line new application socket and monitors it for any I/O error or clean | |
164 | * close that triggers an unregistration of the application. | |
099e26bd DG |
165 | */ |
166 | static struct ust_cmd_queue ust_cmd_queue; | |
167 | ||
2f77fc4b DG |
168 | static const char *module_proc_lttng = "/proc/lttng"; |
169 | ||
ef367a93 | 170 | /* Load session thread information to operate. */ |
51bb4dbb | 171 | static struct load_session_thread_data *load_info; |
7c1d2758 | 172 | |
97bc1426 | 173 | /* |
51bb4dbb | 174 | * Section name to look for in the daemon configuration file. |
97bc1426 | 175 | */ |
51bb4dbb | 176 | static const char * const config_section_name = "sessiond"; |
5e97de00 | 177 | |
51bb4dbb JG |
178 | /* Am I root or not. Set to 1 if the daemon is running as root */ |
179 | static int is_root; | |
5eb91c98 | 180 | |
099e26bd DG |
181 | /* |
182 | * Stop all threads by closing the thread quit pipe. | |
183 | */ | |
cf3af59e MD |
184 | static void stop_threads(void) |
185 | { | |
5eb91c98 DG |
186 | int ret; |
187 | ||
cf3af59e MD |
188 | /* Stopping all threads */ |
189 | DBG("Terminating all threads"); | |
51bb4dbb | 190 | ret = sessiond_notify_quit_pipe(); |
5eb91c98 DG |
191 | if (ret < 0) { |
192 | ERR("write error on thread quit pipe"); | |
193 | } | |
194 | ||
099e26bd | 195 | /* Dispatch thread */ |
26c9d55e | 196 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 197 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
198 | } |
199 | ||
e975f9f8 DG |
200 | /* |
201 | * Close every consumer sockets. | |
202 | */ | |
203 | static void close_consumer_sockets(void) | |
204 | { | |
205 | int ret; | |
206 | ||
207 | if (kconsumer_data.err_sock >= 0) { | |
208 | ret = close(kconsumer_data.err_sock); | |
209 | if (ret < 0) { | |
210 | PERROR("kernel consumer err_sock close"); | |
211 | } | |
212 | } | |
213 | if (ustconsumer32_data.err_sock >= 0) { | |
214 | ret = close(ustconsumer32_data.err_sock); | |
215 | if (ret < 0) { | |
a76cbd9f | 216 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
217 | } |
218 | } | |
219 | if (ustconsumer64_data.err_sock >= 0) { | |
220 | ret = close(ustconsumer64_data.err_sock); | |
221 | if (ret < 0) { | |
a76cbd9f | 222 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
223 | } |
224 | } | |
225 | if (kconsumer_data.cmd_sock >= 0) { | |
226 | ret = close(kconsumer_data.cmd_sock); | |
227 | if (ret < 0) { | |
228 | PERROR("kernel consumer cmd_sock close"); | |
229 | } | |
230 | } | |
231 | if (ustconsumer32_data.cmd_sock >= 0) { | |
232 | ret = close(ustconsumer32_data.cmd_sock); | |
233 | if (ret < 0) { | |
a76cbd9f | 234 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
235 | } |
236 | } | |
237 | if (ustconsumer64_data.cmd_sock >= 0) { | |
238 | ret = close(ustconsumer64_data.cmd_sock); | |
239 | if (ret < 0) { | |
a76cbd9f | 240 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
241 | } |
242 | } | |
b3530820 JG |
243 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
244 | ret = close(kconsumer_data.channel_monitor_pipe); | |
245 | if (ret < 0) { | |
246 | PERROR("kernel consumer channel monitor pipe close"); | |
247 | } | |
248 | } | |
249 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
250 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
251 | if (ret < 0) { | |
252 | PERROR("UST consumerd32 channel monitor pipe close"); | |
253 | } | |
254 | } | |
255 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
256 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
257 | if (ret < 0) { | |
258 | PERROR("UST consumerd64 channel monitor pipe close"); | |
259 | } | |
260 | } | |
e975f9f8 DG |
261 | } |
262 | ||
4e4714cb JR |
263 | /* |
264 | * Wait on consumer process termination. | |
265 | * | |
266 | * Need to be called with the consumer data lock held or from a context | |
267 | * ensuring no concurrent access to data (e.g: cleanup). | |
268 | */ | |
269 | static void wait_consumer(struct consumer_data *consumer_data) | |
270 | { | |
271 | pid_t ret; | |
272 | int status; | |
273 | ||
274 | if (consumer_data->pid <= 0) { | |
275 | return; | |
276 | } | |
277 | ||
278 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
279 | consumer_data->pid); | |
280 | ret = waitpid(consumer_data->pid, &status, 0); | |
281 | if (ret == -1) { | |
282 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 283 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
284 | ERR("consumerd termination with error: %d", |
285 | WEXITSTATUS(ret)); | |
286 | } | |
287 | consumer_data->pid = 0; | |
288 | } | |
289 | ||
fac6795d | 290 | /* |
4a15001e | 291 | * Cleanup the session daemon's data structures. |
fac6795d | 292 | */ |
4a15001e | 293 | static void sessiond_cleanup(void) |
fac6795d | 294 | { |
ef599319 | 295 | int ret; |
48a86f68 | 296 | struct ltt_session_list *session_list = session_get_list(); |
fac6795d | 297 | |
4a15001e | 298 | DBG("Cleanup sessiond"); |
e07ae692 | 299 | |
4e449f3f MD |
300 | /* |
301 | * Close the thread quit pipe. It has already done its job, | |
302 | * since we are now called. | |
303 | */ | |
51bb4dbb | 304 | sessiond_close_quit_pipe(); |
2f77fc4b | 305 | |
c9a2957d JG |
306 | ret = remove(config.pid_file_path.value); |
307 | if (ret < 0) { | |
308 | PERROR("remove pidfile %s", config.pid_file_path.value); | |
35f90c40 DG |
309 | } |
310 | ||
e6142f2e JG |
311 | DBG("Removing sessiond and consumerd content of directory %s", |
312 | config.rundir.value); | |
8c6c56c2 MD |
313 | |
314 | /* sessiond */ | |
e6142f2e JG |
315 | DBG("Removing %s", config.pid_file_path.value); |
316 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 317 | |
e6142f2e JG |
318 | DBG("Removing %s", config.agent_port_file_path.value); |
319 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 320 | |
8c6c56c2 | 321 | /* kconsumerd */ |
e6142f2e JG |
322 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
323 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
324 | ||
325 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
326 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
327 | |
328 | /* ust consumerd 32 */ | |
e6142f2e JG |
329 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
330 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
331 | ||
332 | DBG("Removing directory %s", config.consumerd32_path.value); | |
333 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
334 | |
335 | /* ust consumerd 64 */ | |
e6142f2e JG |
336 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
337 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
338 | ||
339 | DBG("Removing directory %s", config.consumerd64_path.value); | |
340 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 341 | |
6af972a2 | 342 | pthread_mutex_destroy(&session_list->lock); |
273ea72c | 343 | |
4e4714cb JR |
344 | wait_consumer(&kconsumer_data); |
345 | wait_consumer(&ustconsumer64_data); | |
346 | wait_consumer(&ustconsumer32_data); | |
347 | ||
6a4e4039 JG |
348 | DBG("Cleaning up all agent apps"); |
349 | agent_app_ht_clean(); | |
350 | ||
099e26bd | 351 | DBG("Closing all UST sockets"); |
56fff090 | 352 | ust_app_clean_list(); |
7972aab2 | 353 | buffer_reg_destroy_registries(); |
099e26bd | 354 | |
e6142f2e | 355 | if (is_root && !config.no_kernel) { |
4fba7219 | 356 | DBG2("Closing kernel fd"); |
a4b35e07 | 357 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
358 | ret = close(kernel_tracer_fd); |
359 | if (ret) { | |
360 | PERROR("close"); | |
361 | } | |
a4b35e07 | 362 | } |
2f50c8a3 | 363 | DBG("Unloading kernel modules"); |
096102bd | 364 | modprobe_remove_lttng_all(); |
834978fd | 365 | free(syscall_table); |
2f50c8a3 | 366 | } |
2f77fc4b | 367 | |
e975f9f8 DG |
368 | close_consumer_sockets(); |
369 | ||
ef367a93 JG |
370 | if (load_info) { |
371 | load_session_destroy_data(load_info); | |
372 | free(load_info); | |
373 | } | |
374 | ||
c9cb3e7d JG |
375 | /* |
376 | * We do NOT rmdir rundir because there are other processes | |
377 | * using it, for instance lttng-relayd, which can start in | |
378 | * parallel with this teardown. | |
379 | */ | |
4a15001e MD |
380 | } |
381 | ||
382 | /* | |
383 | * Cleanup the daemon's option data structures. | |
384 | */ | |
385 | static void sessiond_cleanup_options(void) | |
386 | { | |
387 | DBG("Cleaning up options"); | |
388 | ||
e6142f2e | 389 | sessiond_config_fini(&config); |
c9cb3e7d | 390 | |
7567352f | 391 | run_as_destroy_worker(); |
fac6795d DG |
392 | } |
393 | ||
fac6795d | 394 | /* |
0fdd1e2c | 395 | * Notify UST applications using the shm mmap futex. |
fac6795d | 396 | */ |
0fdd1e2c | 397 | static int notify_ust_apps(int active) |
fac6795d | 398 | { |
0fdd1e2c | 399 | char *wait_shm_mmap; |
fac6795d | 400 | |
0fdd1e2c | 401 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 402 | |
0fdd1e2c | 403 | /* See shm.c for this call implying mmap, shm and futex calls */ |
e6142f2e | 404 | wait_shm_mmap = shm_ust_get_mmap(config.wait_shm_path.value, is_root); |
0fdd1e2c | 405 | if (wait_shm_mmap == NULL) { |
fac6795d DG |
406 | goto error; |
407 | } | |
408 | ||
0fdd1e2c DG |
409 | /* Wake waiting process */ |
410 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
411 | ||
412 | /* Apps notified successfully */ | |
413 | return 0; | |
fac6795d DG |
414 | |
415 | error: | |
0fdd1e2c | 416 | return -1; |
fac6795d DG |
417 | } |
418 | ||
7a485870 | 419 | /* |
5eb91c98 | 420 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 421 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 422 | */ |
5eb91c98 | 423 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 424 | { |
5eb91c98 | 425 | int ret; |
7a485870 | 426 | struct ltt_kernel_channel *channel; |
48a86f68 JG |
427 | struct ltt_session *session; |
428 | const struct ltt_session_list *session_list = session_get_list(); | |
7a485870 | 429 | |
5eb91c98 | 430 | DBG("Updating kernel poll set"); |
7a485870 | 431 | |
54d01ffb | 432 | session_lock_list(); |
48a86f68 JG |
433 | cds_list_for_each_entry(session, &session_list->head, list) { |
434 | if (!session_get(session)) { | |
435 | continue; | |
436 | } | |
54d01ffb | 437 | session_lock(session); |
7a485870 | 438 | if (session->kernel_session == NULL) { |
54d01ffb | 439 | session_unlock(session); |
48a86f68 | 440 | session_put(session); |
7a485870 DG |
441 | continue; |
442 | } | |
7a485870 | 443 | |
54d01ffb DG |
444 | cds_list_for_each_entry(channel, |
445 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
446 | /* Add channel fd to the kernel poll set */ |
447 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
448 | if (ret < 0) { | |
54d01ffb | 449 | session_unlock(session); |
48a86f68 | 450 | session_put(session); |
5eb91c98 DG |
451 | goto error; |
452 | } | |
453 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 454 | } |
54d01ffb | 455 | session_unlock(session); |
7a485870 | 456 | } |
54d01ffb | 457 | session_unlock_list(); |
7a485870 | 458 | |
5eb91c98 | 459 | return 0; |
7a485870 DG |
460 | |
461 | error: | |
54d01ffb | 462 | session_unlock_list(); |
7a485870 DG |
463 | return -1; |
464 | } | |
465 | ||
466 | /* | |
54d01ffb | 467 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 468 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 469 | * |
d063d709 | 470 | * Useful for CPU hotplug feature. |
7a485870 | 471 | */ |
7f032058 | 472 | static int update_kernel_stream(int fd) |
7a485870 DG |
473 | { |
474 | int ret = 0; | |
475 | struct ltt_session *session; | |
173af62f | 476 | struct ltt_kernel_session *ksess; |
7a485870 | 477 | struct ltt_kernel_channel *channel; |
48a86f68 | 478 | const struct ltt_session_list *session_list = session_get_list(); |
7a485870 DG |
479 | |
480 | DBG("Updating kernel streams for channel fd %d", fd); | |
481 | ||
54d01ffb | 482 | session_lock_list(); |
48a86f68 JG |
483 | cds_list_for_each_entry(session, &session_list->head, list) { |
484 | if (!session_get(session)) { | |
485 | continue; | |
486 | } | |
54d01ffb | 487 | session_lock(session); |
7a485870 | 488 | if (session->kernel_session == NULL) { |
54d01ffb | 489 | session_unlock(session); |
48a86f68 | 490 | session_put(session); |
7a485870 DG |
491 | continue; |
492 | } | |
173af62f | 493 | ksess = session->kernel_session; |
d9800920 | 494 | |
4a15001e MD |
495 | cds_list_for_each_entry(channel, |
496 | &ksess->channel_list.head, list) { | |
497 | struct lttng_ht_iter iter; | |
498 | struct consumer_socket *socket; | |
d9800920 | 499 | |
4a15001e MD |
500 | if (channel->fd != fd) { |
501 | continue; | |
502 | } | |
503 | DBG("Channel found, updating kernel streams"); | |
504 | ret = kernel_open_channel_stream(channel); | |
505 | if (ret < 0) { | |
506 | goto error; | |
507 | } | |
508 | /* Update the stream global counter */ | |
509 | ksess->stream_count_global += ret; | |
510 | ||
511 | /* | |
512 | * Have we already sent fds to the consumer? If yes, it | |
513 | * means that tracing is started so it is safe to send | |
514 | * our updated stream fds. | |
515 | */ | |
516 | if (ksess->consumer_fds_sent != 1 | |
517 | || ksess->consumer == NULL) { | |
518 | ret = -1; | |
519 | goto error; | |
520 | } | |
521 | ||
522 | rcu_read_lock(); | |
523 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
524 | &iter.iter, socket, node.node) { | |
525 | pthread_mutex_lock(socket->lock); | |
1fc1b7c8 | 526 | ret = kernel_consumer_send_channel_streams(socket, |
4a15001e MD |
527 | channel, ksess, |
528 | session->output_traces ? 1 : 0); | |
529 | pthread_mutex_unlock(socket->lock); | |
530 | if (ret < 0) { | |
e7fe706f | 531 | rcu_read_unlock(); |
4a15001e | 532 | goto error; |
7a485870 | 533 | } |
7a485870 | 534 | } |
4a15001e | 535 | rcu_read_unlock(); |
7a485870 | 536 | } |
54d01ffb | 537 | session_unlock(session); |
48a86f68 | 538 | session_put(session); |
7a485870 | 539 | } |
54d01ffb | 540 | session_unlock_list(); |
b3c750d2 | 541 | return ret; |
7a485870 | 542 | |
b3c750d2 | 543 | error: |
54d01ffb | 544 | session_unlock(session); |
48a86f68 | 545 | session_put(session); |
54d01ffb | 546 | session_unlock_list(); |
7a485870 DG |
547 | return ret; |
548 | } | |
549 | ||
487cf67c | 550 | /* |
ffe60014 DG |
551 | * For each tracing session, update newly registered apps. The session list |
552 | * lock MUST be acquired before calling this. | |
487cf67c DG |
553 | */ |
554 | static void update_ust_app(int app_sock) | |
555 | { | |
556 | struct ltt_session *sess, *stmp; | |
48a86f68 | 557 | const struct ltt_session_list *session_list = session_get_list(); |
487cf67c | 558 | |
fdadac08 DG |
559 | /* Consumer is in an ERROR state. Stop any application update. */ |
560 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
561 | /* Stop the update process since the consumer is dead. */ | |
562 | return; | |
563 | } | |
564 | ||
487cf67c | 565 | /* For all tracing session(s) */ |
48a86f68 | 566 | cds_list_for_each_entry_safe(sess, stmp, &session_list->head, list) { |
a9ad0c8f MD |
567 | struct ust_app *app; |
568 | ||
48a86f68 JG |
569 | if (!session_get(sess)) { |
570 | continue; | |
571 | } | |
4ee14516 | 572 | session_lock(sess); |
a9ad0c8f MD |
573 | if (!sess->ust_session) { |
574 | goto unlock_session; | |
575 | } | |
576 | ||
577 | rcu_read_lock(); | |
578 | assert(app_sock >= 0); | |
579 | app = ust_app_find_by_sock(app_sock); | |
580 | if (app == NULL) { | |
581 | /* | |
582 | * Application can be unregistered before so | |
583 | * this is possible hence simply stopping the | |
584 | * update. | |
585 | */ | |
586 | DBG3("UST app update failed to find app sock %d", | |
587 | app_sock); | |
588 | goto unlock_rcu; | |
421cb601 | 589 | } |
a9ad0c8f MD |
590 | ust_app_global_update(sess->ust_session, app); |
591 | unlock_rcu: | |
592 | rcu_read_unlock(); | |
593 | unlock_session: | |
4ee14516 | 594 | session_unlock(sess); |
48a86f68 | 595 | session_put(sess); |
487cf67c DG |
596 | } |
597 | } | |
598 | ||
7a485870 | 599 | /* |
d063d709 | 600 | * This thread manage event coming from the kernel. |
7a485870 | 601 | * |
d063d709 DG |
602 | * Features supported in this thread: |
603 | * -) CPU Hotplug | |
7a485870 DG |
604 | */ |
605 | static void *thread_manage_kernel(void *data) | |
606 | { | |
139ac872 | 607 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 608 | uint32_t revents, nb_fd; |
7a485870 | 609 | char tmp; |
5eb91c98 | 610 | struct lttng_poll_event events; |
7a485870 | 611 | |
6993eeb3 | 612 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 613 | |
6c71277b | 614 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 615 | |
d5d63bf1 DG |
616 | /* |
617 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 618 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 619 | */ |
6d737ce4 | 620 | lttng_poll_init(&events); |
d5d63bf1 | 621 | |
e547b070 | 622 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
623 | goto error_testpoint; |
624 | } | |
8ac94142 | 625 | |
840cb59c | 626 | health_code_update(); |
44a5e5eb | 627 | |
e547b070 | 628 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 629 | goto error_testpoint; |
6993eeb3 CB |
630 | } |
631 | ||
7a485870 | 632 | while (1) { |
840cb59c | 633 | health_code_update(); |
44a5e5eb | 634 | |
7a485870 | 635 | if (update_poll_flag == 1) { |
d21b0d71 DG |
636 | /* Clean events object. We are about to populate it again. */ |
637 | lttng_poll_clean(&events); | |
638 | ||
d0b96690 | 639 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
640 | if (ret < 0) { |
641 | goto error_poll_create; | |
642 | } | |
643 | ||
644 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
645 | if (ret < 0) { | |
646 | goto error; | |
647 | } | |
5f822d0a | 648 | |
d21b0d71 | 649 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
650 | ret = update_kernel_poll(&events); |
651 | if (ret < 0) { | |
7a485870 DG |
652 | goto error; |
653 | } | |
654 | update_poll_flag = 0; | |
655 | } | |
656 | ||
7fa2082e | 657 | DBG("Thread kernel polling"); |
7a485870 DG |
658 | |
659 | /* Poll infinite value of time */ | |
88f2b785 | 660 | restart: |
a78af745 | 661 | health_poll_entry(); |
5eb91c98 | 662 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
663 | DBG("Thread kernel return from poll on %d fds", |
664 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 665 | health_poll_exit(); |
7a485870 | 666 | if (ret < 0) { |
88f2b785 MD |
667 | /* |
668 | * Restart interrupted system call. | |
669 | */ | |
670 | if (errno == EINTR) { | |
671 | goto restart; | |
672 | } | |
7a485870 DG |
673 | goto error; |
674 | } else if (ret == 0) { | |
675 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
676 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
677 | "This should not have happened! Continuing..."); | |
7a485870 DG |
678 | continue; |
679 | } | |
680 | ||
0d9c5d77 DG |
681 | nb_fd = ret; |
682 | ||
5eb91c98 DG |
683 | for (i = 0; i < nb_fd; i++) { |
684 | /* Fetch once the poll data */ | |
685 | revents = LTTNG_POLL_GETEV(&events, i); | |
686 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 687 | |
840cb59c | 688 | health_code_update(); |
44a5e5eb | 689 | |
fd20dac9 MD |
690 | if (!revents) { |
691 | /* No activity for this FD (poll implementation). */ | |
692 | continue; | |
693 | } | |
694 | ||
5eb91c98 | 695 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 696 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 697 | if (ret) { |
139ac872 MD |
698 | err = 0; |
699 | goto exit; | |
5eb91c98 | 700 | } |
7a485870 | 701 | |
5eb91c98 | 702 | /* Check for data on kernel pipe */ |
03e43155 MD |
703 | if (revents & LPOLLIN) { |
704 | if (pollfd == kernel_poll_pipe[0]) { | |
705 | (void) lttng_read(kernel_poll_pipe[0], | |
706 | &tmp, 1); | |
707 | /* | |
708 | * Ret value is useless here, if this pipe gets any actions an | |
709 | * update is required anyway. | |
710 | */ | |
711 | update_poll_flag = 1; | |
712 | continue; | |
713 | } else { | |
714 | /* | |
715 | * New CPU detected by the kernel. Adding kernel stream to | |
716 | * kernel session and updating the kernel consumer | |
717 | */ | |
7f032058 | 718 | ret = update_kernel_stream(pollfd); |
5eb91c98 DG |
719 | if (ret < 0) { |
720 | continue; | |
721 | } | |
722 | break; | |
7a485870 | 723 | } |
03e43155 MD |
724 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
725 | update_poll_flag = 1; | |
726 | continue; | |
727 | } else { | |
728 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
729 | goto error; | |
7a485870 DG |
730 | } |
731 | } | |
732 | } | |
733 | ||
139ac872 | 734 | exit: |
7a485870 | 735 | error: |
5eb91c98 | 736 | lttng_poll_clean(&events); |
76d7553f | 737 | error_poll_create: |
6993eeb3 | 738 | error_testpoint: |
6620da75 DG |
739 | utils_close_pipe(kernel_poll_pipe); |
740 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 741 | if (err) { |
840cb59c | 742 | health_error(); |
139ac872 | 743 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
744 | WARN("Kernel thread died unexpectedly. " |
745 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 746 | } |
8782cc74 | 747 | health_unregister(health_sessiond); |
76d7553f | 748 | DBG("Kernel thread dying"); |
7a485870 DG |
749 | return NULL; |
750 | } | |
751 | ||
a23ec3a7 DG |
752 | /* |
753 | * Signal pthread condition of the consumer data that the thread. | |
754 | */ | |
755 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
756 | { | |
757 | pthread_mutex_lock(&data->cond_mutex); | |
758 | ||
759 | /* | |
760 | * The state is set before signaling. It can be any value, it's the waiter | |
761 | * job to correctly interpret this condition variable associated to the | |
762 | * consumer pthread_cond. | |
763 | * | |
764 | * A value of 0 means that the corresponding thread of the consumer data | |
765 | * was not started. 1 indicates that the thread has started and is ready | |
766 | * for action. A negative value means that there was an error during the | |
767 | * thread bootstrap. | |
768 | */ | |
769 | data->consumer_thread_is_ready = state; | |
770 | (void) pthread_cond_signal(&data->cond); | |
771 | ||
772 | pthread_mutex_unlock(&data->cond_mutex); | |
773 | } | |
774 | ||
1d4b027a | 775 | /* |
3bd1e081 | 776 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 777 | */ |
050e613c | 778 | void *thread_manage_consumer(void *data) |
1d4b027a | 779 | { |
42fc1d0b | 780 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 781 | uint32_t revents, nb_fd; |
1d4b027a | 782 | enum lttcomm_return_code code; |
5eb91c98 | 783 | struct lttng_poll_event events; |
3bd1e081 | 784 | struct consumer_data *consumer_data = data; |
b3530820 | 785 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 786 | |
3bd1e081 | 787 | DBG("[thread] Manage consumer started"); |
1d4b027a | 788 | |
34c1e15a MD |
789 | rcu_register_thread(); |
790 | rcu_thread_online(); | |
791 | ||
6c71277b | 792 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 793 | |
855060f8 | 794 | health_code_update(); |
9449cc75 | 795 | |
5eb91c98 | 796 | /* |
331744e3 JD |
797 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
798 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 799 | */ |
331744e3 | 800 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 801 | if (ret < 0) { |
76d7553f | 802 | goto error_poll; |
5eb91c98 | 803 | } |
273ea72c | 804 | |
edb8b045 DG |
805 | /* |
806 | * The error socket here is already in a listening state which was done | |
807 | * just before spawning this thread to avoid a race between the consumer | |
808 | * daemon exec trying to connect and the listen() call. | |
809 | */ | |
3bd1e081 | 810 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
811 | if (ret < 0) { |
812 | goto error; | |
813 | } | |
814 | ||
840cb59c | 815 | health_code_update(); |
44a5e5eb | 816 | |
331744e3 | 817 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 818 | restart: |
a78af745 | 819 | health_poll_entry(); |
8ac94142 | 820 | |
e547b070 | 821 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
822 | goto error; |
823 | } | |
8ac94142 | 824 | |
5eb91c98 | 825 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 826 | health_poll_exit(); |
273ea72c | 827 | if (ret < 0) { |
88f2b785 MD |
828 | /* |
829 | * Restart interrupted system call. | |
830 | */ | |
831 | if (errno == EINTR) { | |
832 | goto restart; | |
833 | } | |
273ea72c DG |
834 | goto error; |
835 | } | |
836 | ||
0d9c5d77 DG |
837 | nb_fd = ret; |
838 | ||
5eb91c98 DG |
839 | for (i = 0; i < nb_fd; i++) { |
840 | /* Fetch once the poll data */ | |
841 | revents = LTTNG_POLL_GETEV(&events, i); | |
842 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
843 | ||
840cb59c | 844 | health_code_update(); |
44a5e5eb | 845 | |
fd20dac9 MD |
846 | if (!revents) { |
847 | /* No activity for this FD (poll implementation). */ | |
848 | continue; | |
849 | } | |
850 | ||
5eb91c98 | 851 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 852 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 853 | if (ret) { |
139ac872 MD |
854 | err = 0; |
855 | goto exit; | |
5eb91c98 DG |
856 | } |
857 | ||
858 | /* Event on the registration socket */ | |
3bd1e081 | 859 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
860 | if (revents & LPOLLIN) { |
861 | continue; | |
862 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 863 | ERR("consumer err socket poll error"); |
5eb91c98 | 864 | goto error; |
03e43155 MD |
865 | } else { |
866 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
867 | goto error; | |
5eb91c98 DG |
868 | } |
869 | } | |
273ea72c DG |
870 | } |
871 | ||
3bd1e081 | 872 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
873 | if (sock < 0) { |
874 | goto error; | |
875 | } | |
876 | ||
b662582b DG |
877 | /* |
878 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
879 | * show must go on. | |
880 | */ | |
881 | (void) utils_set_fd_cloexec(sock); | |
882 | ||
840cb59c | 883 | health_code_update(); |
44a5e5eb | 884 | |
3bd1e081 | 885 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 886 | |
712ea556 | 887 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
888 | ret = lttcomm_recv_unix_sock(sock, &code, |
889 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
890 | if (ret <= 0) { |
891 | goto error; | |
892 | } | |
893 | ||
840cb59c | 894 | health_code_update(); |
b3530820 | 895 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 896 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
897 | lttcomm_get_readable_code(-code)); |
898 | goto error; | |
899 | } | |
900 | ||
b3530820 JG |
901 | /* Connect both command and metadata sockets. */ |
902 | consumer_data->cmd_sock = | |
903 | lttcomm_connect_unix_sock( | |
904 | consumer_data->cmd_unix_sock_path); | |
905 | consumer_data->metadata_fd = | |
906 | lttcomm_connect_unix_sock( | |
907 | consumer_data->cmd_unix_sock_path); | |
908 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
909 | PERROR("consumer connect cmd socket"); | |
910 | /* On error, signal condition and quit. */ | |
911 | signal_consumer_condition(consumer_data, -1); | |
912 | goto error; | |
913 | } | |
914 | ||
915 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
916 | ||
917 | /* Create metadata socket lock. */ | |
918 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
919 | if (consumer_data->metadata_sock.lock == NULL) { | |
920 | PERROR("zmalloc pthread mutex"); | |
921 | goto error; | |
922 | } | |
923 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
924 | ||
925 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
926 | DBG("Consumer metadata socket ready (fd: %d)", | |
927 | consumer_data->metadata_fd); | |
928 | ||
929 | /* | |
930 | * Remove the consumerd error sock since we've established a connection. | |
931 | */ | |
3bd1e081 | 932 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 933 | if (ret < 0) { |
72079cae DG |
934 | goto error; |
935 | } | |
936 | ||
331744e3 | 937 | /* Add new accepted error socket. */ |
5eb91c98 DG |
938 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
939 | if (ret < 0) { | |
72079cae | 940 | goto error; |
5eb91c98 DG |
941 | } |
942 | ||
331744e3 | 943 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 944 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
945 | LPOLLIN | LPOLLRDHUP); |
946 | if (ret < 0) { | |
947 | goto error; | |
948 | } | |
949 | ||
840cb59c | 950 | health_code_update(); |
44a5e5eb | 951 | |
b3530820 | 952 | /* |
62c43103 | 953 | * Transfer the write-end of the channel monitoring and rotate pipe |
82528808 | 954 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE command. |
b3530820 JG |
955 | */ |
956 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
957 | if (!cmd_socket_wrapper) { | |
958 | goto error; | |
959 | } | |
3e4dc117 | 960 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
961 | |
962 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
963 | consumer_data->channel_monitor_pipe); | |
964 | if (ret) { | |
965 | goto error; | |
966 | } | |
62c43103 | 967 | |
b3530820 JG |
968 | /* Discard the socket wrapper as it is no longer needed. */ |
969 | consumer_destroy_socket(cmd_socket_wrapper); | |
970 | cmd_socket_wrapper = NULL; | |
971 | ||
972 | /* The thread is completely initialized, signal that it is ready. */ | |
973 | signal_consumer_condition(consumer_data, 1); | |
974 | ||
331744e3 | 975 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 976 | restart_poll: |
331744e3 | 977 | while (1) { |
42fc1d0b DG |
978 | health_code_update(); |
979 | ||
980 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
981 | if (should_quit) { | |
982 | /* Not a health error. */ | |
983 | err = 0; | |
984 | goto exit; | |
985 | } | |
986 | ||
331744e3 JD |
987 | health_poll_entry(); |
988 | ret = lttng_poll_wait(&events, -1); | |
989 | health_poll_exit(); | |
990 | if (ret < 0) { | |
991 | /* | |
992 | * Restart interrupted system call. | |
993 | */ | |
994 | if (errno == EINTR) { | |
995 | goto restart_poll; | |
996 | } | |
997 | goto error; | |
88f2b785 | 998 | } |
72079cae | 999 | |
331744e3 | 1000 | nb_fd = ret; |
0d9c5d77 | 1001 | |
331744e3 JD |
1002 | for (i = 0; i < nb_fd; i++) { |
1003 | /* Fetch once the poll data */ | |
1004 | revents = LTTNG_POLL_GETEV(&events, i); | |
1005 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1006 | |
331744e3 | 1007 | health_code_update(); |
44a5e5eb | 1008 | |
fd20dac9 MD |
1009 | if (!revents) { |
1010 | /* No activity for this FD (poll implementation). */ | |
1011 | continue; | |
1012 | } | |
1013 | ||
42fc1d0b DG |
1014 | /* |
1015 | * Thread quit pipe has been triggered, flag that we should stop | |
1016 | * but continue the current loop to handle potential data from | |
1017 | * consumer. | |
1018 | */ | |
1019 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1020 | |
331744e3 JD |
1021 | if (pollfd == sock) { |
1022 | /* Event on the consumerd socket */ | |
03e43155 MD |
1023 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1024 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1025 | ERR("consumer err socket second poll error"); |
1026 | goto error; | |
1027 | } | |
1028 | health_code_update(); | |
1029 | /* Wait for any kconsumerd error */ | |
1030 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1031 | sizeof(enum lttcomm_return_code)); | |
1032 | if (ret <= 0) { | |
1033 | ERR("consumer closed the command socket"); | |
1034 | goto error; | |
1035 | } | |
1036 | ||
1037 | ERR("consumer return code : %s", | |
1038 | lttcomm_get_readable_code(-code)); | |
1039 | ||
1040 | goto exit; | |
4ce514c4 | 1041 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1042 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1043 | && !(revents & LPOLLIN)) { | |
1044 | ERR("consumer err metadata socket second poll error"); | |
1045 | goto error; | |
1046 | } | |
331744e3 JD |
1047 | /* UST metadata requests */ |
1048 | ret = ust_consumer_metadata_request( | |
1049 | &consumer_data->metadata_sock); | |
1050 | if (ret < 0) { | |
1051 | ERR("Handling metadata request"); | |
1052 | goto error; | |
1053 | } | |
5eb91c98 | 1054 | } |
42fc1d0b | 1055 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1056 | } |
331744e3 | 1057 | health_code_update(); |
5eb91c98 DG |
1058 | } |
1059 | ||
139ac872 | 1060 | exit: |
1d4b027a | 1061 | error: |
fdadac08 DG |
1062 | /* |
1063 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1064 | * thread might be using them so get exclusive access which will abort all |
1065 | * other consumer command by other threads. | |
fdadac08 DG |
1066 | */ |
1067 | pthread_mutex_lock(&consumer_data->lock); | |
1068 | ||
5c827ce0 DG |
1069 | /* Immediately set the consumerd state to stopped */ |
1070 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1071 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1072 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1073 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1074 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1075 | } else { | |
1076 | /* Code flow error... */ | |
1077 | assert(0); | |
1078 | } | |
1079 | ||
76d7553f MD |
1080 | if (consumer_data->err_sock >= 0) { |
1081 | ret = close(consumer_data->err_sock); | |
1082 | if (ret) { | |
1083 | PERROR("close"); | |
1084 | } | |
a76cbd9f | 1085 | consumer_data->err_sock = -1; |
76d7553f MD |
1086 | } |
1087 | if (consumer_data->cmd_sock >= 0) { | |
1088 | ret = close(consumer_data->cmd_sock); | |
1089 | if (ret) { | |
1090 | PERROR("close"); | |
1091 | } | |
a76cbd9f | 1092 | consumer_data->cmd_sock = -1; |
76d7553f | 1093 | } |
96544455 SS |
1094 | if (consumer_data->metadata_sock.fd_ptr && |
1095 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1096 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1097 | if (ret) { |
1098 | PERROR("close"); | |
1099 | } | |
1100 | } | |
76d7553f MD |
1101 | if (sock >= 0) { |
1102 | ret = close(sock); | |
1103 | if (ret) { | |
1104 | PERROR("close"); | |
1105 | } | |
1106 | } | |
273ea72c | 1107 | |
3bd1e081 MD |
1108 | unlink(consumer_data->err_unix_sock_path); |
1109 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1110 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1111 | |
fdadac08 | 1112 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1113 | if (consumer_data->metadata_sock.lock) { |
1114 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1115 | free(consumer_data->metadata_sock.lock); | |
1116 | } | |
5eb91c98 | 1117 | lttng_poll_clean(&events); |
b3530820 JG |
1118 | |
1119 | if (cmd_socket_wrapper) { | |
1120 | consumer_destroy_socket(cmd_socket_wrapper); | |
1121 | } | |
76d7553f | 1122 | error_poll: |
139ac872 | 1123 | if (err) { |
840cb59c | 1124 | health_error(); |
139ac872 MD |
1125 | ERR("Health error occurred in %s", __func__); |
1126 | } | |
8782cc74 | 1127 | health_unregister(health_sessiond); |
76d7553f | 1128 | DBG("consumer thread cleanup completed"); |
0177d773 | 1129 | |
34c1e15a MD |
1130 | rcu_thread_offline(); |
1131 | rcu_unregister_thread(); | |
1132 | ||
5eb91c98 | 1133 | return NULL; |
099e26bd DG |
1134 | } |
1135 | ||
099e26bd | 1136 | /* |
81f04d5f JG |
1137 | * This thread receives application command sockets (FDs) on the |
1138 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1139 | * or an error occurs. | |
1140 | * | |
1141 | * At that point, it flushes the data (tracing and metadata) associated | |
1142 | * with this application and tears down ust app sessions and other | |
1143 | * associated data structures through ust_app_unregister(). | |
1144 | * | |
1145 | * Note that this thread never sends commands to the applications | |
1146 | * through the command sockets; it merely listens for hang-ups | |
1147 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1148 | */ |
1149 | static void *thread_manage_apps(void *data) | |
099e26bd | 1150 | { |
139ac872 | 1151 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1152 | ssize_t size_ret; |
5eb91c98 | 1153 | uint32_t revents, nb_fd; |
5eb91c98 | 1154 | struct lttng_poll_event events; |
099e26bd DG |
1155 | |
1156 | DBG("[thread] Manage application started"); | |
1157 | ||
f6a9efaa DG |
1158 | rcu_register_thread(); |
1159 | rcu_thread_online(); | |
1160 | ||
6c71277b | 1161 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1162 | |
e547b070 | 1163 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1164 | goto error_testpoint; |
1165 | } | |
1166 | ||
840cb59c | 1167 | health_code_update(); |
44a5e5eb | 1168 | |
d0b96690 | 1169 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1170 | if (ret < 0) { |
76d7553f | 1171 | goto error_poll_create; |
5eb91c98 | 1172 | } |
099e26bd | 1173 | |
5eb91c98 DG |
1174 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1175 | if (ret < 0) { | |
1176 | goto error; | |
1177 | } | |
099e26bd | 1178 | |
e547b070 | 1179 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1180 | goto error; |
1181 | } | |
8ac94142 | 1182 | |
840cb59c | 1183 | health_code_update(); |
44a5e5eb | 1184 | |
5eb91c98 | 1185 | while (1) { |
7fa2082e | 1186 | DBG("Apps thread polling"); |
099e26bd DG |
1187 | |
1188 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1189 | restart: |
a78af745 | 1190 | health_poll_entry(); |
5eb91c98 | 1191 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1192 | DBG("Apps thread return from poll on %d fds", |
1193 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1194 | health_poll_exit(); |
099e26bd | 1195 | if (ret < 0) { |
88f2b785 MD |
1196 | /* |
1197 | * Restart interrupted system call. | |
1198 | */ | |
1199 | if (errno == EINTR) { | |
1200 | goto restart; | |
1201 | } | |
099e26bd DG |
1202 | goto error; |
1203 | } | |
1204 | ||
0d9c5d77 DG |
1205 | nb_fd = ret; |
1206 | ||
5eb91c98 DG |
1207 | for (i = 0; i < nb_fd; i++) { |
1208 | /* Fetch once the poll data */ | |
1209 | revents = LTTNG_POLL_GETEV(&events, i); | |
1210 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1211 | ||
840cb59c | 1212 | health_code_update(); |
44a5e5eb | 1213 | |
fd20dac9 MD |
1214 | if (!revents) { |
1215 | /* No activity for this FD (poll implementation). */ | |
1216 | continue; | |
1217 | } | |
1218 | ||
5eb91c98 | 1219 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1220 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1221 | if (ret) { |
139ac872 MD |
1222 | err = 0; |
1223 | goto exit; | |
5eb91c98 | 1224 | } |
099e26bd | 1225 | |
5eb91c98 DG |
1226 | /* Inspect the apps cmd pipe */ |
1227 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1228 | if (revents & LPOLLIN) { |
d0b96690 DG |
1229 | int sock; |
1230 | ||
5eb91c98 | 1231 | /* Empty pipe */ |
6cd525e8 MD |
1232 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1233 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1234 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1235 | goto error; |
1236 | } | |
099e26bd | 1237 | |
840cb59c | 1238 | health_code_update(); |
44a5e5eb | 1239 | |
ffe60014 | 1240 | /* |
03e43155 MD |
1241 | * Since this is a command socket (write then read), |
1242 | * we only monitor the error events of the socket. | |
ffe60014 | 1243 | */ |
d0b96690 DG |
1244 | ret = lttng_poll_add(&events, sock, |
1245 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1246 | if (ret < 0) { | |
5eb91c98 | 1247 | goto error; |
e0c7ec2b | 1248 | } |
acc7b41b | 1249 | |
d0b96690 | 1250 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1251 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1252 | ERR("Apps command pipe error"); | |
1253 | goto error; | |
1254 | } else { | |
1255 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1256 | goto error; | |
0177d773 | 1257 | } |
5eb91c98 DG |
1258 | } else { |
1259 | /* | |
54d01ffb DG |
1260 | * At this point, we know that a registered application made |
1261 | * the event at poll_wait. | |
5eb91c98 DG |
1262 | */ |
1263 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1264 | /* Removing from the poll set */ | |
1265 | ret = lttng_poll_del(&events, pollfd); | |
1266 | if (ret < 0) { | |
1267 | goto error; | |
1268 | } | |
099e26bd | 1269 | |
b9d9b220 | 1270 | /* Socket closed on remote end. */ |
56fff090 | 1271 | ust_app_unregister(pollfd); |
03e43155 MD |
1272 | } else { |
1273 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1274 | goto error; | |
5eb91c98 | 1275 | } |
099e26bd | 1276 | } |
44a5e5eb | 1277 | |
840cb59c | 1278 | health_code_update(); |
099e26bd | 1279 | } |
099e26bd DG |
1280 | } |
1281 | ||
139ac872 | 1282 | exit: |
099e26bd | 1283 | error: |
5eb91c98 | 1284 | lttng_poll_clean(&events); |
76d7553f | 1285 | error_poll_create: |
6993eeb3 | 1286 | error_testpoint: |
6620da75 DG |
1287 | utils_close_pipe(apps_cmd_pipe); |
1288 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1289 | ||
1290 | /* | |
1291 | * We don't clean the UST app hash table here since already registered | |
1292 | * applications can still be controlled so let them be until the session | |
1293 | * daemon dies or the applications stop. | |
1294 | */ | |
1295 | ||
139ac872 | 1296 | if (err) { |
840cb59c | 1297 | health_error(); |
139ac872 MD |
1298 | ERR("Health error occurred in %s", __func__); |
1299 | } | |
8782cc74 | 1300 | health_unregister(health_sessiond); |
76d7553f | 1301 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1302 | rcu_thread_offline(); |
1303 | rcu_unregister_thread(); | |
099e26bd DG |
1304 | return NULL; |
1305 | } | |
1306 | ||
d0b96690 | 1307 | /* |
d88aee68 DG |
1308 | * Send a socket to a thread This is called from the dispatch UST registration |
1309 | * thread once all sockets are set for the application. | |
d0b96690 | 1310 | * |
b85dc84c DG |
1311 | * The sock value can be invalid, we don't really care, the thread will handle |
1312 | * it and make the necessary cleanup if so. | |
1313 | * | |
d0b96690 DG |
1314 | * On success, return 0 else a negative value being the errno message of the |
1315 | * write(). | |
1316 | */ | |
d88aee68 | 1317 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1318 | { |
6cd525e8 | 1319 | ssize_t ret; |
d0b96690 | 1320 | |
b85dc84c DG |
1321 | /* |
1322 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1323 | * before calling this function being a shutdown state of the thread. | |
1324 | */ | |
1325 | if (fd < 0) { | |
1326 | ret = -EBADF; | |
1327 | goto error; | |
1328 | } | |
d0b96690 | 1329 | |
6cd525e8 MD |
1330 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1331 | if (ret < sizeof(sock)) { | |
d88aee68 | 1332 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1333 | if (ret < 0) { |
1334 | ret = -errno; | |
1335 | } | |
1336 | goto error; | |
1337 | } | |
1338 | ||
1339 | /* All good. Don't send back the write positive ret value. */ | |
1340 | ret = 0; | |
1341 | error: | |
6cd525e8 | 1342 | return (int) ret; |
d0b96690 DG |
1343 | } |
1344 | ||
f45e313d DG |
1345 | /* |
1346 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1347 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1348 | * notify socket is never received. | |
1349 | */ | |
1350 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1351 | { | |
1352 | int ret, nb_fd = 0, i; | |
1353 | unsigned int fd_added = 0; | |
1354 | struct lttng_poll_event events; | |
1355 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1356 | ||
1357 | assert(wait_queue); | |
1358 | ||
1359 | lttng_poll_init(&events); | |
1360 | ||
1361 | /* Just skip everything for an empty queue. */ | |
1362 | if (!wait_queue->count) { | |
1363 | goto end; | |
1364 | } | |
1365 | ||
1366 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1367 | if (ret < 0) { | |
1368 | goto error_create; | |
1369 | } | |
1370 | ||
1371 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1372 | &wait_queue->head, head) { | |
1373 | assert(wait_node->app); | |
1374 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1375 | LPOLLHUP | LPOLLERR); | |
1376 | if (ret < 0) { | |
1377 | goto error; | |
1378 | } | |
1379 | ||
1380 | fd_added = 1; | |
1381 | } | |
1382 | ||
1383 | if (!fd_added) { | |
1384 | goto end; | |
1385 | } | |
1386 | ||
1387 | /* | |
1388 | * Poll but don't block so we can quickly identify the faulty events and | |
1389 | * clean them afterwards from the wait queue. | |
1390 | */ | |
1391 | ret = lttng_poll_wait(&events, 0); | |
1392 | if (ret < 0) { | |
1393 | goto error; | |
1394 | } | |
1395 | nb_fd = ret; | |
1396 | ||
1397 | for (i = 0; i < nb_fd; i++) { | |
1398 | /* Get faulty FD. */ | |
1399 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1400 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1401 | ||
fd20dac9 MD |
1402 | if (!revents) { |
1403 | /* No activity for this FD (poll implementation). */ | |
1404 | continue; | |
1405 | } | |
1406 | ||
f45e313d DG |
1407 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1408 | &wait_queue->head, head) { | |
1409 | if (pollfd == wait_node->app->sock && | |
1410 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1411 | cds_list_del(&wait_node->head); | |
1412 | wait_queue->count--; | |
1413 | ust_app_destroy(wait_node->app); | |
1414 | free(wait_node); | |
48b40bcf JG |
1415 | /* |
1416 | * Silence warning of use-after-free in | |
1417 | * cds_list_for_each_entry_safe which uses | |
1418 | * __typeof__(*wait_node). | |
1419 | */ | |
1420 | wait_node = NULL; | |
f45e313d | 1421 | break; |
03e43155 MD |
1422 | } else { |
1423 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1424 | goto error; | |
f45e313d DG |
1425 | } |
1426 | } | |
1427 | } | |
1428 | ||
1429 | if (nb_fd > 0) { | |
1430 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1431 | } | |
1432 | ||
1433 | end: | |
1434 | lttng_poll_clean(&events); | |
1435 | return; | |
1436 | ||
1437 | error: | |
1438 | lttng_poll_clean(&events); | |
1439 | error_create: | |
1440 | ERR("Unable to sanitize wait queue"); | |
1441 | return; | |
1442 | } | |
1443 | ||
099e26bd DG |
1444 | /* |
1445 | * Dispatch request from the registration threads to the application | |
1446 | * communication thread. | |
1447 | */ | |
1448 | static void *thread_dispatch_ust_registration(void *data) | |
1449 | { | |
12e2b881 | 1450 | int ret, err = -1; |
8bdee6e2 | 1451 | struct cds_wfcq_node *node; |
099e26bd | 1452 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1453 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1454 | struct ust_reg_wait_queue wait_queue = { | |
1455 | .count = 0, | |
1456 | }; | |
d0b96690 | 1457 | |
967e3668 MD |
1458 | rcu_register_thread(); |
1459 | ||
6c71277b | 1460 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1461 | |
9ad42ec1 MD |
1462 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1463 | goto error_testpoint; | |
1464 | } | |
1465 | ||
12e2b881 MD |
1466 | health_code_update(); |
1467 | ||
f45e313d | 1468 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1469 | |
1470 | DBG("[thread] Dispatch UST command started"); | |
1471 | ||
0ed3b1a8 | 1472 | for (;;) { |
12e2b881 MD |
1473 | health_code_update(); |
1474 | ||
099e26bd DG |
1475 | /* Atomically prepare the queue futex */ |
1476 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1477 | ||
0ed3b1a8 MD |
1478 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1479 | break; | |
1480 | } | |
1481 | ||
099e26bd | 1482 | do { |
d0b96690 | 1483 | struct ust_app *app = NULL; |
7972aab2 | 1484 | ust_cmd = NULL; |
d0b96690 | 1485 | |
f45e313d DG |
1486 | /* |
1487 | * Make sure we don't have node(s) that have hung up before receiving | |
1488 | * the notify socket. This is to clean the list in order to avoid | |
1489 | * memory leaks from notify socket that are never seen. | |
1490 | */ | |
1491 | sanitize_wait_queue(&wait_queue); | |
1492 | ||
12e2b881 | 1493 | health_code_update(); |
099e26bd | 1494 | /* Dequeue command for registration */ |
8bdee6e2 | 1495 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1496 | if (node == NULL) { |
00a17c97 | 1497 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1498 | /* Continue thread execution */ |
1499 | break; | |
1500 | } | |
1501 | ||
1502 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1503 | ||
2f50c8a3 DG |
1504 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1505 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1506 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1507 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1508 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1509 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1510 | |
1511 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1512 | wait_node = zmalloc(sizeof(*wait_node)); | |
1513 | if (!wait_node) { | |
1514 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1515 | ret = close(ust_cmd->sock); |
1516 | if (ret < 0) { | |
1517 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1518 | } | |
51dec90d | 1519 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1520 | free(ust_cmd); |
d0b96690 DG |
1521 | goto error; |
1522 | } | |
1523 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1524 | ||
1525 | /* Create application object if socket is CMD. */ | |
1526 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1527 | ust_cmd->sock); | |
1528 | if (!wait_node->app) { | |
1529 | ret = close(ust_cmd->sock); | |
1530 | if (ret < 0) { | |
1531 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1532 | } |
51dec90d | 1533 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1534 | free(wait_node); |
7972aab2 | 1535 | free(ust_cmd); |
d0b96690 DG |
1536 | continue; |
1537 | } | |
1538 | /* | |
1539 | * Add application to the wait queue so we can set the notify | |
1540 | * socket before putting this object in the global ht. | |
1541 | */ | |
f45e313d DG |
1542 | cds_list_add(&wait_node->head, &wait_queue.head); |
1543 | wait_queue.count++; | |
d0b96690 | 1544 | |
7972aab2 | 1545 | free(ust_cmd); |
d0b96690 DG |
1546 | /* |
1547 | * We have to continue here since we don't have the notify | |
1548 | * socket and the application MUST be added to the hash table | |
1549 | * only at that moment. | |
1550 | */ | |
1551 | continue; | |
1552 | } else { | |
1553 | /* | |
1554 | * Look for the application in the local wait queue and set the | |
1555 | * notify socket if found. | |
1556 | */ | |
d88aee68 | 1557 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1558 | &wait_queue.head, head) { |
12e2b881 | 1559 | health_code_update(); |
d0b96690 DG |
1560 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1561 | wait_node->app->notify_sock = ust_cmd->sock; | |
1562 | cds_list_del(&wait_node->head); | |
f45e313d | 1563 | wait_queue.count--; |
d0b96690 DG |
1564 | app = wait_node->app; |
1565 | free(wait_node); | |
1566 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1567 | break; | |
1568 | } | |
1569 | } | |
020d7f60 DG |
1570 | |
1571 | /* | |
1572 | * With no application at this stage the received socket is | |
1573 | * basically useless so close it before we free the cmd data | |
1574 | * structure for good. | |
1575 | */ | |
1576 | if (!app) { | |
1577 | ret = close(ust_cmd->sock); | |
1578 | if (ret < 0) { | |
1579 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1580 | } | |
51dec90d | 1581 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1582 | } |
7972aab2 | 1583 | free(ust_cmd); |
d0b96690 DG |
1584 | } |
1585 | ||
1586 | if (app) { | |
d0b96690 DG |
1587 | /* |
1588 | * @session_lock_list | |
1589 | * | |
1590 | * Lock the global session list so from the register up to the | |
1591 | * registration done message, no thread can see the application | |
1592 | * and change its state. | |
1593 | */ | |
1594 | session_lock_list(); | |
1595 | rcu_read_lock(); | |
d88aee68 | 1596 | |
d0b96690 DG |
1597 | /* |
1598 | * Add application to the global hash table. This needs to be | |
1599 | * done before the update to the UST registry can locate the | |
1600 | * application. | |
1601 | */ | |
1602 | ust_app_add(app); | |
d88aee68 DG |
1603 | |
1604 | /* Set app version. This call will print an error if needed. */ | |
1605 | (void) ust_app_version(app); | |
1606 | ||
1607 | /* Send notify socket through the notify pipe. */ | |
1608 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1609 | app->notify_sock); | |
1610 | if (ret < 0) { | |
1611 | rcu_read_unlock(); | |
1612 | session_unlock_list(); | |
b85dc84c DG |
1613 | /* |
1614 | * No notify thread, stop the UST tracing. However, this is | |
1615 | * not an internal error of the this thread thus setting | |
1616 | * the health error code to a normal exit. | |
1617 | */ | |
1618 | err = 0; | |
d88aee68 | 1619 | goto error; |
6620da75 | 1620 | } |
d88aee68 | 1621 | |
d0b96690 DG |
1622 | /* |
1623 | * Update newly registered application with the tracing | |
1624 | * registry info already enabled information. | |
1625 | */ | |
1626 | update_ust_app(app->sock); | |
d88aee68 DG |
1627 | |
1628 | /* | |
1629 | * Don't care about return value. Let the manage apps threads | |
1630 | * handle app unregistration upon socket close. | |
1631 | */ | |
fb45065e | 1632 | (void) ust_app_register_done(app); |
d88aee68 DG |
1633 | |
1634 | /* | |
1635 | * Even if the application socket has been closed, send the app | |
1636 | * to the thread and unregistration will take place at that | |
1637 | * place. | |
1638 | */ | |
1639 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1640 | if (ret < 0) { |
d88aee68 DG |
1641 | rcu_read_unlock(); |
1642 | session_unlock_list(); | |
b85dc84c DG |
1643 | /* |
1644 | * No apps. thread, stop the UST tracing. However, this is | |
1645 | * not an internal error of the this thread thus setting | |
1646 | * the health error code to a normal exit. | |
1647 | */ | |
1648 | err = 0; | |
d88aee68 | 1649 | goto error; |
d0b96690 | 1650 | } |
d88aee68 | 1651 | |
d0b96690 DG |
1652 | rcu_read_unlock(); |
1653 | session_unlock_list(); | |
099e26bd | 1654 | } |
099e26bd DG |
1655 | } while (node != NULL); |
1656 | ||
12e2b881 | 1657 | health_poll_entry(); |
099e26bd DG |
1658 | /* Futex wait on queue. Blocking call on futex() */ |
1659 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1660 | health_poll_exit(); |
099e26bd | 1661 | } |
12e2b881 MD |
1662 | /* Normal exit, no error */ |
1663 | err = 0; | |
099e26bd DG |
1664 | |
1665 | error: | |
d88aee68 DG |
1666 | /* Clean up wait queue. */ |
1667 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1668 | &wait_queue.head, head) { |
d88aee68 | 1669 | cds_list_del(&wait_node->head); |
f45e313d | 1670 | wait_queue.count--; |
d88aee68 DG |
1671 | free(wait_node); |
1672 | } | |
1673 | ||
772b8f4d MD |
1674 | /* Empty command queue. */ |
1675 | for (;;) { | |
1676 | /* Dequeue command for registration */ | |
1677 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
1678 | if (node == NULL) { | |
1679 | break; | |
1680 | } | |
1681 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1682 | ret = close(ust_cmd->sock); | |
1683 | if (ret < 0) { | |
1684 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
1685 | } | |
1686 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
1687 | free(ust_cmd); | |
1688 | } | |
1689 | ||
9ad42ec1 | 1690 | error_testpoint: |
099e26bd | 1691 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1692 | if (err) { |
1693 | health_error(); | |
1694 | ERR("Health error occurred in %s", __func__); | |
1695 | } | |
8782cc74 | 1696 | health_unregister(health_sessiond); |
967e3668 | 1697 | rcu_unregister_thread(); |
099e26bd DG |
1698 | return NULL; |
1699 | } | |
1700 | ||
1701 | /* | |
1702 | * This thread manage application registration. | |
1703 | */ | |
1704 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1705 | { |
139ac872 | 1706 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1707 | uint32_t revents, nb_fd; |
1708 | struct lttng_poll_event events; | |
099e26bd DG |
1709 | /* |
1710 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1711 | * freed in the manage apps thread. | |
1712 | */ | |
1713 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1714 | |
099e26bd | 1715 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1716 | |
6c71277b | 1717 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1718 | |
e547b070 | 1719 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
1720 | goto error_testpoint; |
1721 | } | |
8ac94142 | 1722 | |
1d4b027a DG |
1723 | ret = lttcomm_listen_unix_sock(apps_sock); |
1724 | if (ret < 0) { | |
76d7553f | 1725 | goto error_listen; |
1d4b027a DG |
1726 | } |
1727 | ||
5eb91c98 DG |
1728 | /* |
1729 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1730 | * more will be added to this poll set. | |
1731 | */ | |
d0b96690 | 1732 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1733 | if (ret < 0) { |
76d7553f | 1734 | goto error_create_poll; |
5eb91c98 | 1735 | } |
273ea72c | 1736 | |
5eb91c98 DG |
1737 | /* Add the application registration socket */ |
1738 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1739 | if (ret < 0) { | |
76d7553f | 1740 | goto error_poll_add; |
5eb91c98 | 1741 | } |
273ea72c | 1742 | |
1d4b027a | 1743 | /* Notify all applications to register */ |
0fdd1e2c DG |
1744 | ret = notify_ust_apps(1); |
1745 | if (ret < 0) { | |
1746 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1747 | "Execution continues but there might be problem for already\n" |
1748 | "running applications that wishes to register."); | |
0fdd1e2c | 1749 | } |
1d4b027a DG |
1750 | |
1751 | while (1) { | |
1752 | DBG("Accepting application registration"); | |
273ea72c DG |
1753 | |
1754 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1755 | restart: |
a78af745 | 1756 | health_poll_entry(); |
5eb91c98 | 1757 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1758 | health_poll_exit(); |
273ea72c | 1759 | if (ret < 0) { |
88f2b785 MD |
1760 | /* |
1761 | * Restart interrupted system call. | |
1762 | */ | |
1763 | if (errno == EINTR) { | |
1764 | goto restart; | |
1765 | } | |
273ea72c DG |
1766 | goto error; |
1767 | } | |
1768 | ||
0d9c5d77 DG |
1769 | nb_fd = ret; |
1770 | ||
5eb91c98 | 1771 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1772 | health_code_update(); |
139ac872 | 1773 | |
5eb91c98 DG |
1774 | /* Fetch once the poll data */ |
1775 | revents = LTTNG_POLL_GETEV(&events, i); | |
1776 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1777 | |
fd20dac9 MD |
1778 | if (!revents) { |
1779 | /* No activity for this FD (poll implementation). */ | |
1780 | continue; | |
1781 | } | |
1782 | ||
5eb91c98 | 1783 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1784 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1785 | if (ret) { |
139ac872 MD |
1786 | err = 0; |
1787 | goto exit; | |
90014c57 | 1788 | } |
1d4b027a | 1789 | |
5eb91c98 DG |
1790 | /* Event on the registration socket */ |
1791 | if (pollfd == apps_sock) { | |
03e43155 | 1792 | if (revents & LPOLLIN) { |
5eb91c98 DG |
1793 | sock = lttcomm_accept_unix_sock(apps_sock); |
1794 | if (sock < 0) { | |
1795 | goto error; | |
1796 | } | |
099e26bd | 1797 | |
16c5c8fa DG |
1798 | /* |
1799 | * Set socket timeout for both receiving and ending. | |
1800 | * app_socket_timeout is in seconds, whereas | |
1801 | * lttcomm_setsockopt_rcv_timeout and | |
1802 | * lttcomm_setsockopt_snd_timeout expect msec as | |
1803 | * parameter. | |
1804 | */ | |
e6142f2e | 1805 | if (config.app_socket_timeout >= 0) { |
28ce0ff2 | 1806 | (void) lttcomm_setsockopt_rcv_timeout(sock, |
e6142f2e | 1807 | config.app_socket_timeout * 1000); |
28ce0ff2 | 1808 | (void) lttcomm_setsockopt_snd_timeout(sock, |
e6142f2e | 1809 | config.app_socket_timeout * 1000); |
28ce0ff2 | 1810 | } |
16c5c8fa | 1811 | |
b662582b DG |
1812 | /* |
1813 | * Set the CLOEXEC flag. Return code is useless because | |
1814 | * either way, the show must go on. | |
1815 | */ | |
1816 | (void) utils_set_fd_cloexec(sock); | |
1817 | ||
5eb91c98 | 1818 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1819 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1820 | if (ust_cmd == NULL) { |
76d7553f | 1821 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
1822 | ret = close(sock); |
1823 | if (ret) { | |
1824 | PERROR("close"); | |
1825 | } | |
5eb91c98 DG |
1826 | goto error; |
1827 | } | |
1d4b027a | 1828 | |
5eb91c98 DG |
1829 | /* |
1830 | * Using message-based transmissions to ensure we don't | |
1831 | * have to deal with partially received messages. | |
1832 | */ | |
4063050c MD |
1833 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1834 | if (ret < 0) { | |
1835 | ERR("Exhausted file descriptors allowed for applications."); | |
1836 | free(ust_cmd); | |
1837 | ret = close(sock); | |
1838 | if (ret) { | |
1839 | PERROR("close"); | |
1840 | } | |
1841 | sock = -1; | |
1842 | continue; | |
1843 | } | |
d88aee68 | 1844 | |
840cb59c | 1845 | health_code_update(); |
d0b96690 DG |
1846 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1847 | if (ret < 0) { | |
5eb91c98 | 1848 | free(ust_cmd); |
d0b96690 | 1849 | /* Close socket of the application. */ |
76d7553f MD |
1850 | ret = close(sock); |
1851 | if (ret) { | |
1852 | PERROR("close"); | |
1853 | } | |
4063050c | 1854 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1855 | sock = -1; |
5eb91c98 DG |
1856 | continue; |
1857 | } | |
840cb59c | 1858 | health_code_update(); |
099e26bd | 1859 | |
5eb91c98 | 1860 | ust_cmd->sock = sock; |
34a2494f | 1861 | sock = -1; |
099e26bd | 1862 | |
5eb91c98 DG |
1863 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1864 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1865 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1866 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1867 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1868 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1869 | |
5eb91c98 DG |
1870 | /* |
1871 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1872 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 1873 | */ |
8bdee6e2 | 1874 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
1875 | |
1876 | /* | |
1877 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 1878 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
1879 | */ |
1880 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
1881 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1882 | ERR("Register apps socket poll error"); | |
1883 | goto error; | |
1884 | } else { | |
1885 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1886 | goto error; | |
5eb91c98 DG |
1887 | } |
1888 | } | |
90014c57 | 1889 | } |
1d4b027a DG |
1890 | } |
1891 | ||
139ac872 | 1892 | exit: |
1d4b027a | 1893 | error: |
0fdd1e2c DG |
1894 | /* Notify that the registration thread is gone */ |
1895 | notify_ust_apps(0); | |
1896 | ||
a4b35e07 | 1897 | if (apps_sock >= 0) { |
76d7553f MD |
1898 | ret = close(apps_sock); |
1899 | if (ret) { | |
1900 | PERROR("close"); | |
1901 | } | |
a4b35e07 | 1902 | } |
46c3f085 | 1903 | if (sock >= 0) { |
76d7553f MD |
1904 | ret = close(sock); |
1905 | if (ret) { | |
1906 | PERROR("close"); | |
1907 | } | |
4063050c | 1908 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1909 | } |
e6142f2e | 1910 | unlink(config.apps_unix_sock_path.value); |
0fdd1e2c | 1911 | |
76d7553f | 1912 | error_poll_add: |
5eb91c98 | 1913 | lttng_poll_clean(&events); |
76d7553f MD |
1914 | error_listen: |
1915 | error_create_poll: | |
6993eeb3 | 1916 | error_testpoint: |
76d7553f | 1917 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
1918 | if (err) { |
1919 | health_error(); | |
1920 | ERR("Health error occurred in %s", __func__); | |
1921 | } | |
8782cc74 | 1922 | health_unregister(health_sessiond); |
5eb91c98 | 1923 | |
1d4b027a DG |
1924 | return NULL; |
1925 | } | |
1926 | ||
b73401da | 1927 | /* |
096102bd | 1928 | * Setup necessary data for kernel tracer action. |
b73401da | 1929 | */ |
096102bd | 1930 | static int init_kernel_tracer(void) |
b73401da DG |
1931 | { |
1932 | int ret; | |
b73401da | 1933 | |
096102bd DG |
1934 | /* Modprobe lttng kernel modules */ |
1935 | ret = modprobe_lttng_control(); | |
b73401da | 1936 | if (ret < 0) { |
b73401da DG |
1937 | goto error; |
1938 | } | |
1939 | ||
096102bd DG |
1940 | /* Open debugfs lttng */ |
1941 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
1942 | if (kernel_tracer_fd < 0) { | |
1943 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 1944 | goto error_open; |
54d01ffb DG |
1945 | } |
1946 | ||
2f77fc4b | 1947 | /* Validate kernel version */ |
88076e89 JD |
1948 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
1949 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
1950 | if (ret < 0) { |
1951 | goto error_version; | |
b551a063 | 1952 | } |
54d01ffb | 1953 | |
2f77fc4b DG |
1954 | ret = modprobe_lttng_data(); |
1955 | if (ret < 0) { | |
1956 | goto error_modules; | |
54d01ffb DG |
1957 | } |
1958 | ||
6e21424e JR |
1959 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
1960 | kernel_tracer_fd); | |
1961 | if (ret < 0) { | |
1962 | goto error_modules; | |
1963 | } | |
1964 | ||
1965 | if (ret < 1) { | |
1966 | WARN("Kernel tracer does not support buffer monitoring. " | |
1967 | "The monitoring timer of channels in the kernel domain " | |
1968 | "will be set to 0 (disabled)."); | |
1969 | } | |
1970 | ||
2f77fc4b DG |
1971 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
1972 | return 0; | |
1973 | ||
1974 | error_version: | |
1975 | modprobe_remove_lttng_control(); | |
1976 | ret = close(kernel_tracer_fd); | |
1977 | if (ret) { | |
1978 | PERROR("close"); | |
b551a063 | 1979 | } |
2f77fc4b | 1980 | kernel_tracer_fd = -1; |
f73fabfd | 1981 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 1982 | |
2f77fc4b DG |
1983 | error_modules: |
1984 | ret = close(kernel_tracer_fd); | |
1985 | if (ret) { | |
1986 | PERROR("close"); | |
b551a063 | 1987 | } |
54d01ffb | 1988 | |
2f77fc4b DG |
1989 | error_open: |
1990 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
1991 | |
1992 | error: | |
2f77fc4b DG |
1993 | WARN("No kernel tracer available"); |
1994 | kernel_tracer_fd = -1; | |
1995 | if (!is_root) { | |
f73fabfd | 1996 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 1997 | } else { |
f73fabfd | 1998 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 1999 | } |
54d01ffb DG |
2000 | } |
2001 | ||
050e613c | 2002 | static int string_match(const char *str1, const char *str2) |
54d01ffb | 2003 | { |
050e613c | 2004 | return (str1 && str2) && !strcmp(str1, str2); |
54d01ffb DG |
2005 | } |
2006 | ||
00e2e675 | 2007 | /* |
050e613c JG |
2008 | * Take an option from the getopt output and set it in the right variable to be |
2009 | * used later. | |
36b588ed | 2010 | * |
050e613c | 2011 | * Return 0 on success else a negative value. |
00e2e675 | 2012 | */ |
050e613c | 2013 | static int set_option(int opt, const char *arg, const char *optname) |
00e2e675 | 2014 | { |
050e613c | 2015 | int ret = 0; |
fac6795d | 2016 | |
c0232ea5 | 2017 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
2018 | if (!arg || *arg == '\0') { |
2019 | ret = -EINVAL; | |
2020 | goto end; | |
2021 | } | |
e8fa9fb0 MD |
2022 | if (lttng_is_setuid_setgid()) { |
2023 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2024 | "-c, --client-sock"); | |
2025 | } else { | |
e6142f2e JG |
2026 | config_string_set(&config.client_unix_sock_path, |
2027 | strdup(arg)); | |
2028 | if (!config.client_unix_sock_path.value) { | |
2029 | ret = -ENOMEM; | |
2030 | PERROR("strdup"); | |
2031 | } | |
e8fa9fb0 | 2032 | } |
c0232ea5 | 2033 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
2034 | if (!arg || *arg == '\0') { |
2035 | ret = -EINVAL; | |
2036 | goto end; | |
2037 | } | |
e8fa9fb0 MD |
2038 | if (lttng_is_setuid_setgid()) { |
2039 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2040 | "-a, --apps-sock"); | |
2041 | } else { | |
e6142f2e JG |
2042 | config_string_set(&config.apps_unix_sock_path, |
2043 | strdup(arg)); | |
2044 | if (!config.apps_unix_sock_path.value) { | |
2045 | ret = -ENOMEM; | |
2046 | PERROR("strdup"); | |
2047 | } | |
e8fa9fb0 | 2048 | } |
c0232ea5 | 2049 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 2050 | config.daemonize = true; |
c0232ea5 | 2051 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 2052 | config.background = true; |
c0232ea5 | 2053 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
2054 | if (!arg || *arg == '\0') { |
2055 | ret = -EINVAL; | |
2056 | goto end; | |
2057 | } | |
e8fa9fb0 MD |
2058 | if (lttng_is_setuid_setgid()) { |
2059 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2060 | "-g, --group"); | |
2061 | } else { | |
e6142f2e JG |
2062 | config_string_set(&config.tracing_group_name, |
2063 | strdup(arg)); | |
2064 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 2065 | ret = -ENOMEM; |
e6142f2e | 2066 | PERROR("strdup"); |
e8fa9fb0 | 2067 | } |
db322c4d | 2068 | } |
c0232ea5 | 2069 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 2070 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 2071 | if (ret) { |
4fc83d94 | 2072 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
2073 | perror("exec"); |
2074 | } | |
2075 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 2076 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
2077 | fprintf(stdout, "%s\n", VERSION); |
2078 | exit(EXIT_SUCCESS); | |
c0232ea5 | 2079 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 2080 | config.sig_parent = true; |
c0232ea5 | 2081 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
2082 | if (!arg || *arg == '\0') { |
2083 | ret = -EINVAL; | |
2084 | goto end; | |
2085 | } | |
e8fa9fb0 MD |
2086 | if (lttng_is_setuid_setgid()) { |
2087 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2088 | "--kconsumerd-err-sock"); | |
2089 | } else { | |
e6142f2e JG |
2090 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
2091 | strdup(arg)); | |
2092 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
2093 | ret = -ENOMEM; | |
2094 | PERROR("strdup"); | |
2095 | } | |
e8fa9fb0 | 2096 | } |
c0232ea5 | 2097 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
2098 | if (!arg || *arg == '\0') { |
2099 | ret = -EINVAL; | |
2100 | goto end; | |
2101 | } | |
e8fa9fb0 MD |
2102 | if (lttng_is_setuid_setgid()) { |
2103 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2104 | "--kconsumerd-cmd-sock"); | |
2105 | } else { | |
e6142f2e JG |
2106 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
2107 | strdup(arg)); | |
2108 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
2109 | ret = -ENOMEM; | |
2110 | PERROR("strdup"); | |
2111 | } | |
e8fa9fb0 | 2112 | } |
c0232ea5 | 2113 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
2114 | if (!arg || *arg == '\0') { |
2115 | ret = -EINVAL; | |
2116 | goto end; | |
2117 | } | |
e8fa9fb0 MD |
2118 | if (lttng_is_setuid_setgid()) { |
2119 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2120 | "--ustconsumerd64-err-sock"); | |
2121 | } else { | |
e6142f2e JG |
2122 | config_string_set(&config.consumerd64_err_unix_sock_path, |
2123 | strdup(arg)); | |
2124 | if (!config.consumerd64_err_unix_sock_path.value) { | |
2125 | ret = -ENOMEM; | |
2126 | PERROR("strdup"); | |
2127 | } | |
e8fa9fb0 | 2128 | } |
c0232ea5 | 2129 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
2130 | if (!arg || *arg == '\0') { |
2131 | ret = -EINVAL; | |
2132 | goto end; | |
2133 | } | |
e8fa9fb0 MD |
2134 | if (lttng_is_setuid_setgid()) { |
2135 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2136 | "--ustconsumerd64-cmd-sock"); | |
2137 | } else { | |
e6142f2e JG |
2138 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
2139 | strdup(arg)); | |
2140 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
2141 | ret = -ENOMEM; | |
2142 | PERROR("strdup"); | |
2143 | } | |
e8fa9fb0 | 2144 | } |
c0232ea5 | 2145 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
2146 | if (!arg || *arg == '\0') { |
2147 | ret = -EINVAL; | |
2148 | goto end; | |
2149 | } | |
e8fa9fb0 MD |
2150 | if (lttng_is_setuid_setgid()) { |
2151 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2152 | "--ustconsumerd32-err-sock"); | |
2153 | } else { | |
e6142f2e JG |
2154 | config_string_set(&config.consumerd32_err_unix_sock_path, |
2155 | strdup(arg)); | |
2156 | if (!config.consumerd32_err_unix_sock_path.value) { | |
2157 | ret = -ENOMEM; | |
2158 | PERROR("strdup"); | |
2159 | } | |
e8fa9fb0 | 2160 | } |
c0232ea5 | 2161 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
2162 | if (!arg || *arg == '\0') { |
2163 | ret = -EINVAL; | |
2164 | goto end; | |
2165 | } | |
e8fa9fb0 MD |
2166 | if (lttng_is_setuid_setgid()) { |
2167 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2168 | "--ustconsumerd32-cmd-sock"); | |
2169 | } else { | |
e6142f2e JG |
2170 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
2171 | strdup(arg)); | |
2172 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
2173 | ret = -ENOMEM; | |
2174 | PERROR("strdup"); | |
2175 | } | |
e8fa9fb0 | 2176 | } |
c0232ea5 | 2177 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 2178 | config.no_kernel = true; |
c0232ea5 | 2179 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 2180 | config.quiet = true; |
c0232ea5 | 2181 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
2182 | /* Verbose level can increase using multiple -v */ |
2183 | if (arg) { | |
13755a18 | 2184 | /* Value obtained from config file */ |
e6142f2e | 2185 | config.verbose = config_parse_value(arg); |
26296c48 | 2186 | } else { |
13755a18 | 2187 | /* -v used on command line */ |
e6142f2e | 2188 | config.verbose++; |
26296c48 | 2189 | } |
13755a18 | 2190 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
2191 | config.verbose = config.verbose < 0 ? 0 : |
2192 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 2193 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 2194 | if (arg) { |
e6142f2e | 2195 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 2196 | } else { |
e6142f2e | 2197 | config.verbose_consumer++; |
26296c48 | 2198 | } |
c0232ea5 | 2199 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
2200 | if (!arg || *arg == '\0') { |
2201 | ret = -EINVAL; | |
2202 | goto end; | |
2203 | } | |
e8fa9fb0 MD |
2204 | if (lttng_is_setuid_setgid()) { |
2205 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2206 | "--consumerd32-path"); | |
2207 | } else { | |
e6142f2e JG |
2208 | config_string_set(&config.consumerd32_bin_path, |
2209 | strdup(arg)); | |
2210 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
2211 | PERROR("strdup"); |
2212 | ret = -ENOMEM; | |
2213 | } | |
db322c4d | 2214 | } |
c0232ea5 | 2215 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
2216 | if (!arg || *arg == '\0') { |
2217 | ret = -EINVAL; | |
2218 | goto end; | |
2219 | } | |
e8fa9fb0 MD |
2220 | if (lttng_is_setuid_setgid()) { |
2221 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2222 | "--consumerd32-libdir"); | |
2223 | } else { | |
e6142f2e JG |
2224 | config_string_set(&config.consumerd32_lib_dir, |
2225 | strdup(arg)); | |
2226 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
2227 | PERROR("strdup"); |
2228 | ret = -ENOMEM; | |
2229 | } | |
db322c4d | 2230 | } |
c0232ea5 | 2231 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
2232 | if (!arg || *arg == '\0') { |
2233 | ret = -EINVAL; | |
2234 | goto end; | |
2235 | } | |
e8fa9fb0 MD |
2236 | if (lttng_is_setuid_setgid()) { |
2237 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2238 | "--consumerd64-path"); | |
2239 | } else { | |
e6142f2e JG |
2240 | config_string_set(&config.consumerd64_bin_path, |
2241 | strdup(arg)); | |
2242 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
2243 | PERROR("strdup"); |
2244 | ret = -ENOMEM; | |
2245 | } | |
db322c4d | 2246 | } |
c0232ea5 | 2247 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
2248 | if (!arg || *arg == '\0') { |
2249 | ret = -EINVAL; | |
2250 | goto end; | |
2251 | } | |
e8fa9fb0 MD |
2252 | if (lttng_is_setuid_setgid()) { |
2253 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2254 | "--consumerd64-libdir"); | |
2255 | } else { | |
e6142f2e JG |
2256 | config_string_set(&config.consumerd64_lib_dir, |
2257 | strdup(arg)); | |
2258 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
2259 | PERROR("strdup"); |
2260 | ret = -ENOMEM; | |
2261 | } | |
db322c4d | 2262 | } |
c0232ea5 | 2263 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
2264 | if (!arg || *arg == '\0') { |
2265 | ret = -EINVAL; | |
2266 | goto end; | |
2267 | } | |
e8fa9fb0 MD |
2268 | if (lttng_is_setuid_setgid()) { |
2269 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2270 | "-p, --pidfile"); | |
2271 | } else { | |
e6142f2e JG |
2272 | config_string_set(&config.pid_file_path, strdup(arg)); |
2273 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
2274 | PERROR("strdup"); |
2275 | ret = -ENOMEM; | |
2276 | } | |
db322c4d | 2277 | } |
c0232ea5 | 2278 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
2279 | if (!arg || *arg == '\0') { |
2280 | ret = -EINVAL; | |
2281 | goto end; | |
2282 | } | |
e8fa9fb0 MD |
2283 | if (lttng_is_setuid_setgid()) { |
2284 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2285 | "--agent-tcp-port"); | |
2286 | } else { | |
2287 | unsigned long v; | |
4d076222 | 2288 | |
e8fa9fb0 MD |
2289 | errno = 0; |
2290 | v = strtoul(arg, NULL, 0); | |
2291 | if (errno != 0 || !isdigit(arg[0])) { | |
2292 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
2293 | return -1; | |
2294 | } | |
2295 | if (v == 0 || v >= 65535) { | |
2296 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
2297 | return -1; | |
2298 | } | |
2288467f JG |
2299 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
2300 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 2301 | } |
c0232ea5 | 2302 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
2303 | if (!arg || *arg == '\0') { |
2304 | ret = -EINVAL; | |
2305 | goto end; | |
2306 | } | |
e8fa9fb0 MD |
2307 | if (lttng_is_setuid_setgid()) { |
2308 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2309 | "-l, --load"); | |
2310 | } else { | |
e6142f2e JG |
2311 | config_string_set(&config.load_session_path, strdup(arg)); |
2312 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
2313 | PERROR("strdup"); |
2314 | ret = -ENOMEM; | |
2315 | } | |
ef367a93 | 2316 | } |
c0232ea5 | 2317 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
2318 | if (!arg || *arg == '\0') { |
2319 | ret = -EINVAL; | |
2320 | goto end; | |
2321 | } | |
e8fa9fb0 MD |
2322 | if (lttng_is_setuid_setgid()) { |
2323 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2324 | "--kmod-probes"); | |
2325 | } else { | |
e6142f2e JG |
2326 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
2327 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
2328 | PERROR("strdup"); |
2329 | ret = -ENOMEM; | |
2330 | } | |
c9d42407 | 2331 | } |
c0232ea5 | 2332 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
2333 | if (!arg || *arg == '\0') { |
2334 | ret = -EINVAL; | |
2335 | goto end; | |
2336 | } | |
e8fa9fb0 MD |
2337 | if (lttng_is_setuid_setgid()) { |
2338 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2339 | "--extra-kmod-probes"); | |
2340 | } else { | |
e6142f2e JG |
2341 | config_string_set(&config.kmod_extra_probes_list, |
2342 | strdup(arg)); | |
2343 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
2344 | PERROR("strdup"); |
2345 | ret = -ENOMEM; | |
2346 | } | |
db322c4d | 2347 | } |
c0232ea5 JG |
2348 | } else if (string_match(optname, "config") || opt == 'f') { |
2349 | /* This is handled in set_options() thus silent skip. */ | |
2350 | goto end; | |
2351 | } else { | |
26296c48 JG |
2352 | /* Unknown option or other error. |
2353 | * Error is printed by getopt, just return */ | |
2354 | ret = -1; | |
2355 | } | |
2356 | ||
f3dd7ce7 | 2357 | end: |
c5d350b2 JG |
2358 | if (ret == -EINVAL) { |
2359 | const char *opt_name = "unknown"; | |
2360 | int i; | |
2361 | ||
2362 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
2363 | i++) { | |
2364 | if (opt == long_options[i].val) { | |
2365 | opt_name = long_options[i].name; | |
2366 | break; | |
2367 | } | |
2368 | } | |
2369 | ||
2370 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
2371 | opt_name); | |
2372 | } | |
f3dd7ce7 | 2373 | |
26296c48 JG |
2374 | return ret; |
2375 | } | |
2376 | ||
2377 | /* | |
2378 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 2379 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
2380 | * return value conventions. |
2381 | */ | |
2382 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
2383 | { | |
2384 | int ret = 0, i; | |
2385 | ||
2386 | if (!entry || !entry->name || !entry->value) { | |
2387 | ret = -EINVAL; | |
2388 | goto end; | |
2389 | } | |
2390 | ||
2391 | /* Check if the option is to be ignored */ | |
2392 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
2393 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
2394 | goto end; | |
2395 | } | |
2396 | } | |
2397 | ||
2398 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
2399 | i++) { | |
2400 | ||
2401 | /* Ignore if not fully matched. */ | |
2402 | if (strcmp(entry->name, long_options[i].name)) { | |
2403 | continue; | |
2404 | } | |
2405 | ||
2406 | /* | |
2407 | * If the option takes no argument on the command line, we have to | |
2408 | * check if the value is "true". We support non-zero numeric values, | |
2409 | * true, on and yes. | |
2410 | */ | |
2411 | if (!long_options[i].has_arg) { | |
2412 | ret = config_parse_value(entry->value); | |
2413 | if (ret <= 0) { | |
2414 | if (ret) { | |
2415 | WARN("Invalid configuration value \"%s\" for option %s", | |
2416 | entry->value, entry->name); | |
2417 | } | |
2418 | /* False, skip boolean config option. */ | |
2419 | goto end; | |
4d076222 | 2420 | } |
26296c48 JG |
2421 | } |
2422 | ||
2423 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
2424 | goto end; | |
2425 | } | |
2426 | ||
2427 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
2428 | ||
2429 | end: | |
2430 | return ret; | |
2431 | } | |
2432 | ||
2433 | /* | |
2434 | * daemon configuration loading and argument parsing | |
2435 | */ | |
2436 | static int set_options(int argc, char **argv) | |
2437 | { | |
2438 | int ret = 0, c = 0, option_index = 0; | |
2439 | int orig_optopt = optopt, orig_optind = optind; | |
2440 | char *optstring; | |
2441 | const char *config_path = NULL; | |
2442 | ||
2443 | optstring = utils_generate_optstring(long_options, | |
2444 | sizeof(long_options) / sizeof(struct option)); | |
2445 | if (!optstring) { | |
2446 | ret = -ENOMEM; | |
2447 | goto end; | |
2448 | } | |
2449 | ||
2450 | /* Check for the --config option */ | |
2451 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
2452 | &option_index)) != -1) { | |
2453 | if (c == '?') { | |
2454 | ret = -EINVAL; | |
2455 | goto end; | |
2456 | } else if (c != 'f') { | |
2457 | /* if not equal to --config option. */ | |
2458 | continue; | |
2459 | } | |
2460 | ||
e8fa9fb0 MD |
2461 | if (lttng_is_setuid_setgid()) { |
2462 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
2463 | "-f, --config"); | |
2464 | } else { | |
2465 | config_path = utils_expand_path(optarg); | |
2466 | if (!config_path) { | |
2467 | ERR("Failed to resolve path: %s", optarg); | |
2468 | } | |
26296c48 JG |
2469 | } |
2470 | } | |
2471 | ||
2472 | ret = config_get_section_entries(config_path, config_section_name, | |
2473 | config_entry_handler, NULL); | |
2474 | if (ret) { | |
2475 | if (ret > 0) { | |
2476 | ERR("Invalid configuration option at line %i", ret); | |
2477 | ret = -1; | |
2478 | } | |
2479 | goto end; | |
2480 | } | |
2481 | ||
2482 | /* Reset getopt's global state */ | |
2483 | optopt = orig_optopt; | |
2484 | optind = orig_optind; | |
2485 | while (1) { | |
c0232ea5 JG |
2486 | option_index = -1; |
2487 | /* | |
2488 | * getopt_long() will not set option_index if it encounters a | |
2489 | * short option. | |
2490 | */ | |
2491 | c = getopt_long(argc, argv, optstring, long_options, | |
2492 | &option_index); | |
26296c48 | 2493 | if (c == -1) { |
4d076222 DG |
2494 | break; |
2495 | } | |
26296c48 | 2496 | |
c0232ea5 JG |
2497 | /* |
2498 | * Pass NULL as the long option name if popt left the index | |
2499 | * unset. | |
2500 | */ | |
2501 | ret = set_option(c, optarg, | |
2502 | option_index < 0 ? NULL : | |
2503 | long_options[option_index].name); | |
26296c48 JG |
2504 | if (ret < 0) { |
2505 | break; | |
fac6795d DG |
2506 | } |
2507 | } | |
2508 | ||
26296c48 JG |
2509 | end: |
2510 | free(optstring); | |
2511 | return ret; | |
fac6795d DG |
2512 | } |
2513 | ||
2514 | /* | |
050e613c | 2515 | * Creates the application socket. |
fac6795d | 2516 | */ |
cf3af59e | 2517 | static int init_daemon_socket(void) |
fac6795d DG |
2518 | { |
2519 | int ret = 0; | |
2520 | mode_t old_umask; | |
2521 | ||
2522 | old_umask = umask(0); | |
2523 | ||
fac6795d | 2524 | /* Create the application unix socket */ |
e6142f2e | 2525 | apps_sock = lttcomm_create_unix_sock(config.apps_unix_sock_path.value); |
d6f42150 | 2526 | if (apps_sock < 0) { |
e6142f2e | 2527 | ERR("Create unix sock failed: %s", config.apps_unix_sock_path.value); |
fac6795d DG |
2528 | ret = -1; |
2529 | goto end; | |
2530 | } | |
2531 | ||
b662582b DG |
2532 | /* Set the cloexec flag */ |
2533 | ret = utils_set_fd_cloexec(apps_sock); | |
2534 | if (ret < 0) { | |
2535 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
2536 | "Continuing but note that the consumer daemon will have a " | |
2537 | "reference to this socket on exec()", apps_sock); | |
2538 | } | |
2539 | ||
d6f42150 | 2540 | /* File permission MUST be 666 */ |
e6142f2e | 2541 | ret = chmod(config.apps_unix_sock_path.value, |
54d01ffb | 2542 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
fac6795d | 2543 | if (ret < 0) { |
e6142f2e | 2544 | ERR("Set file permissions failed: %s", config.apps_unix_sock_path.value); |
76d7553f | 2545 | PERROR("chmod"); |
fac6795d DG |
2546 | goto end; |
2547 | } | |
2548 | ||
050e613c JG |
2549 | DBG3("Session daemon application socket %d created", |
2550 | apps_sock); | |
b662582b | 2551 | |
fac6795d DG |
2552 | end: |
2553 | umask(old_umask); | |
2554 | return ret; | |
2555 | } | |
2556 | ||
f472090a JG |
2557 | /* |
2558 | * Create lockfile using the rundir and return its fd. | |
2559 | */ | |
2560 | static int create_lockfile(void) | |
2561 | { | |
2562 | return utils_create_lock_file(config.lock_file_path.value); | |
2563 | } | |
2564 | ||
fac6795d | 2565 | /* |
54d01ffb DG |
2566 | * Check if the global socket is available, and if a daemon is answering at the |
2567 | * other side. If yes, error is returned. | |
f472090a JG |
2568 | * |
2569 | * Also attempts to create and hold the lock file. | |
fac6795d | 2570 | */ |
cf3af59e | 2571 | static int check_existing_daemon(void) |
fac6795d | 2572 | { |
f472090a JG |
2573 | int ret = 0; |
2574 | ||
7d8234d9 | 2575 | /* Is there anybody out there ? */ |
099e26bd | 2576 | if (lttng_session_daemon_alive()) { |
f472090a JG |
2577 | ret = -EEXIST; |
2578 | goto end; | |
099e26bd | 2579 | } |
b09c7c76 | 2580 | |
f472090a JG |
2581 | lockfile_fd = create_lockfile(); |
2582 | if (lockfile_fd < 0) { | |
2583 | ret = -EEXIST; | |
2584 | goto end; | |
2585 | } | |
2586 | end: | |
2587 | return ret; | |
2588 | } | |
2589 | ||
2590 | static void sessiond_cleanup_lock_file(void) | |
2591 | { | |
2592 | int ret; | |
2593 | ||
2594 | /* | |
2595 | * Cleanup lock file by deleting it and finaly closing it which will | |
2596 | * release the file system lock. | |
2597 | */ | |
2598 | if (lockfile_fd >= 0) { | |
2599 | ret = remove(config.lock_file_path.value); | |
2600 | if (ret < 0) { | |
2601 | PERROR("remove lock file"); | |
2602 | } | |
2603 | ret = close(lockfile_fd); | |
2604 | if (ret < 0) { | |
2605 | PERROR("close lock file"); | |
2606 | } | |
2607 | } | |
fac6795d DG |
2608 | } |
2609 | ||
fac6795d | 2610 | /* |
d063d709 | 2611 | * Set the tracing group gid onto the client socket. |
5e16da05 | 2612 | * |
d063d709 | 2613 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 2614 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 2615 | */ |
be040666 | 2616 | static int set_permissions(char *rundir) |
fac6795d DG |
2617 | { |
2618 | int ret; | |
996b65c8 | 2619 | gid_t gid; |
fac6795d | 2620 | |
e6142f2e | 2621 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 2622 | |
d6f42150 | 2623 | /* Set lttng run dir */ |
be040666 | 2624 | ret = chown(rundir, 0, gid); |
d6f42150 | 2625 | if (ret < 0) { |
be040666 | 2626 | ERR("Unable to set group on %s", rundir); |
76d7553f | 2627 | PERROR("chown"); |
d6f42150 DG |
2628 | } |
2629 | ||
6c71277b MD |
2630 | /* |
2631 | * Ensure all applications and tracing group can search the run | |
2632 | * dir. Allow everyone to read the directory, since it does not | |
2633 | * buy us anything to hide its content. | |
2634 | */ | |
2635 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
2636 | if (ret < 0) { |
2637 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 2638 | PERROR("chmod"); |
d1613cf5 JN |
2639 | } |
2640 | ||
d6f42150 | 2641 | /* lttng client socket path */ |
e6142f2e | 2642 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 2643 | if (ret < 0) { |
e6142f2e | 2644 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 2645 | PERROR("chown"); |
d6f42150 DG |
2646 | } |
2647 | ||
3bd1e081 | 2648 | /* kconsumer error socket path */ |
6c71277b | 2649 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 2650 | if (ret < 0) { |
3bd1e081 | 2651 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 2652 | PERROR("chown"); |
3bd1e081 MD |
2653 | } |
2654 | ||
7753dea8 | 2655 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 2656 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
2657 | if (ret < 0) { |
2658 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 2659 | PERROR("chown"); |
7753dea8 MD |
2660 | } |
2661 | ||
2662 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 2663 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 2664 | if (ret < 0) { |
7753dea8 | 2665 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 2666 | PERROR("chown"); |
fac6795d DG |
2667 | } |
2668 | ||
d6f42150 | 2669 | DBG("All permissions are set"); |
e07ae692 | 2670 | |
fac6795d DG |
2671 | return ret; |
2672 | } | |
2673 | ||
d6f42150 | 2674 | /* |
d063d709 | 2675 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 2676 | */ |
e6142f2e | 2677 | static int create_lttng_rundir(void) |
d6f42150 DG |
2678 | { |
2679 | int ret; | |
2680 | ||
e6142f2e | 2681 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 2682 | |
e6142f2e | 2683 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 2684 | if (ret < 0) { |
b1f11e69 | 2685 | if (errno != EEXIST) { |
e6142f2e | 2686 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
2687 | goto error; |
2688 | } else { | |
2689 | ret = 0; | |
2690 | } | |
d6f42150 DG |
2691 | } |
2692 | ||
2693 | error: | |
2694 | return ret; | |
2695 | } | |
2696 | ||
2697 | /* | |
e6142f2e | 2698 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 2699 | * session daemon. |
d6f42150 | 2700 | */ |
e6142f2e | 2701 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
2702 | { |
2703 | int ret; | |
e6142f2e | 2704 | char *path = NULL; |
d6f42150 | 2705 | |
6c71277b | 2706 | switch (consumer_data->type) { |
7753dea8 | 2707 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 2708 | path = config.kconsumerd_path.value; |
7753dea8 MD |
2709 | break; |
2710 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 2711 | path = config.consumerd64_path.value; |
7753dea8 MD |
2712 | break; |
2713 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 2714 | path = config.consumerd32_path.value; |
7753dea8 MD |
2715 | break; |
2716 | default: | |
2717 | ERR("Consumer type unknown"); | |
2718 | ret = -EINVAL; | |
2719 | goto error; | |
d6f42150 | 2720 | } |
e6142f2e | 2721 | assert(path); |
d6f42150 | 2722 | |
67e40797 DG |
2723 | DBG2("Creating consumer directory: %s", path); |
2724 | ||
6c71277b | 2725 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
2726 | if (ret < 0 && errno != EEXIST) { |
2727 | PERROR("mkdir"); | |
2728 | ERR("Failed to create %s", path); | |
2729 | goto error; | |
d6f42150 | 2730 | } |
6c71277b | 2731 | if (is_root) { |
e6142f2e | 2732 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
2733 | if (ret < 0) { |
2734 | ERR("Unable to set group on %s", path); | |
2735 | PERROR("chown"); | |
2736 | goto error; | |
2737 | } | |
2738 | } | |
d6f42150 | 2739 | |
e6142f2e | 2740 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
2741 | consumer_data->err_sock = |
2742 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
2743 | if (consumer_data->err_sock < 0) { | |
2744 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
2745 | ret = -1; |
2746 | goto error; | |
2747 | } | |
2748 | ||
a24f05ab MD |
2749 | /* |
2750 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
2751 | * show must go on. | |
2752 | */ | |
2753 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
2754 | if (ret < 0) { | |
2755 | PERROR("utils_set_fd_cloexec"); | |
2756 | /* continue anyway */ | |
2757 | } | |
2758 | ||
d6f42150 | 2759 | /* File permission MUST be 660 */ |
3bd1e081 | 2760 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 2761 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 2762 | if (ret < 0) { |
3bd1e081 | 2763 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 2764 | PERROR("chmod"); |
d6f42150 DG |
2765 | goto error; |
2766 | } | |
2767 | ||
2768 | error: | |
2769 | return ret; | |
2770 | } | |
2771 | ||
fac6795d | 2772 | /* |
d063d709 | 2773 | * Signal handler for the daemon |
cf3af59e | 2774 | * |
54d01ffb DG |
2775 | * Simply stop all worker threads, leaving main() return gracefully after |
2776 | * joining all threads and calling cleanup(). | |
fac6795d DG |
2777 | */ |
2778 | static void sighandler(int sig) | |
2779 | { | |
2780 | switch (sig) { | |
cf3af59e | 2781 | case SIGINT: |
af87c45a | 2782 | DBG("SIGINT caught"); |
cf3af59e MD |
2783 | stop_threads(); |
2784 | break; | |
2785 | case SIGTERM: | |
af87c45a | 2786 | DBG("SIGTERM caught"); |
cf3af59e MD |
2787 | stop_threads(); |
2788 | break; | |
0bb7724a DG |
2789 | case SIGUSR1: |
2790 | CMM_STORE_SHARED(recv_child_signal, 1); | |
2791 | break; | |
cf3af59e MD |
2792 | default: |
2793 | break; | |
fac6795d | 2794 | } |
fac6795d DG |
2795 | } |
2796 | ||
2797 | /* | |
d063d709 | 2798 | * Setup signal handler for : |
1d4b027a | 2799 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 2800 | */ |
1d4b027a | 2801 | static int set_signal_handler(void) |
fac6795d | 2802 | { |
1d4b027a DG |
2803 | int ret = 0; |
2804 | struct sigaction sa; | |
2805 | sigset_t sigset; | |
fac6795d | 2806 | |
1d4b027a | 2807 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 2808 | PERROR("sigemptyset"); |
1d4b027a DG |
2809 | return ret; |
2810 | } | |
d6f42150 | 2811 | |
1d4b027a DG |
2812 | sa.sa_mask = sigset; |
2813 | sa.sa_flags = 0; | |
0072e5e2 MD |
2814 | |
2815 | sa.sa_handler = sighandler; | |
1d4b027a | 2816 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 2817 | PERROR("sigaction"); |
1d4b027a | 2818 | return ret; |
d6f42150 DG |
2819 | } |
2820 | ||
1d4b027a | 2821 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 2822 | PERROR("sigaction"); |
1d4b027a | 2823 | return ret; |
d6f42150 | 2824 | } |
aaf26714 | 2825 | |
0072e5e2 | 2826 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 2827 | PERROR("sigaction"); |
1d4b027a | 2828 | return ret; |
8c0faa1d DG |
2829 | } |
2830 | ||
0072e5e2 MD |
2831 | sa.sa_handler = SIG_IGN; |
2832 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
2833 | PERROR("sigaction"); |
2834 | return ret; | |
2835 | } | |
2836 | ||
2837 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
2838 | |
2839 | return ret; | |
fac6795d DG |
2840 | } |
2841 | ||
f3ed775e | 2842 | /* |
d063d709 | 2843 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 2844 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
2845 | */ |
2846 | static void set_ulimit(void) | |
2847 | { | |
2848 | int ret; | |
2849 | struct rlimit lim; | |
2850 | ||
514bb9f0 | 2851 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
2852 | lim.rlim_cur = 65535; |
2853 | lim.rlim_max = 65535; | |
2854 | ||
2855 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
2856 | if (ret < 0) { | |
76d7553f | 2857 | PERROR("failed to set open files limit"); |
f3ed775e DG |
2858 | } |
2859 | } | |
2860 | ||
4a15001e | 2861 | static int write_pidfile(void) |
35f90c40 | 2862 | { |
e6142f2e | 2863 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
2864 | } |
2865 | ||
e6142f2e JG |
2866 | static int set_clock_plugin_env(void) |
2867 | { | |
2868 | int ret = 0; | |
2869 | char *env_value = NULL; | |
cd9290dd | 2870 | |
e6142f2e JG |
2871 | if (!config.lttng_ust_clock_plugin.value) { |
2872 | goto end; | |
2873 | } | |
2874 | ||
2875 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
2876 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 2877 | if (ret < 0) { |
e6142f2e JG |
2878 | PERROR("asprintf"); |
2879 | goto end; | |
cd9290dd DG |
2880 | } |
2881 | ||
e6142f2e JG |
2882 | ret = putenv(env_value); |
2883 | if (ret) { | |
2884 | free(env_value); | |
2885 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
2886 | goto end; | |
2887 | } | |
cd9290dd | 2888 | |
e6142f2e JG |
2889 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
2890 | config.lttng_ust_clock_plugin.value); | |
2891 | end: | |
4a15001e | 2892 | return ret; |
ef367a93 JG |
2893 | } |
2894 | ||
6af972a2 JG |
2895 | static void destroy_all_sessions_and_wait(void) |
2896 | { | |
2897 | struct ltt_session *session, *tmp; | |
2898 | struct ltt_session_list *session_list; | |
2899 | ||
2900 | session_list = session_get_list(); | |
2901 | DBG("Initiating destruction of all sessions"); | |
2902 | ||
2903 | if (!session_list) { | |
2904 | return; | |
2905 | } | |
2906 | ||
6af972a2 JG |
2907 | session_lock_list(); |
2908 | /* Initiate the destruction of all sessions. */ | |
2909 | cds_list_for_each_entry_safe(session, tmp, | |
2910 | &session_list->head, list) { | |
2911 | if (!session_get(session)) { | |
2912 | continue; | |
2913 | } | |
2914 | ||
2915 | session_lock(session); | |
2916 | if (session->destroyed) { | |
2917 | goto unlock_session; | |
2918 | } | |
2919 | (void) cmd_destroy_session(session, | |
2920 | notification_thread_handle); | |
2921 | unlock_session: | |
2922 | session_unlock(session); | |
2923 | session_put(session); | |
2924 | } | |
2925 | session_unlock_list(); | |
2926 | ||
2927 | /* Wait for the destruction of all sessions to complete. */ | |
2928 | DBG("Waiting for the destruction of all sessions to complete"); | |
2929 | session_list_wait_empty(); | |
2930 | DBG("Destruction of all sessions completed"); | |
2931 | } | |
2932 | ||
fac6795d DG |
2933 | /* |
2934 | * main | |
2935 | */ | |
2936 | int main(int argc, char **argv) | |
2937 | { | |
4a15001e | 2938 | int ret = 0, retval = 0; |
fac6795d | 2939 | void *status; |
e6142f2e | 2940 | const char *env_app_timeout; |
b3530820 JG |
2941 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
2942 | *ust64_channel_monitor_pipe = NULL, | |
2943 | *kernel_channel_monitor_pipe = NULL; | |
548468b9 | 2944 | struct lttng_thread *ht_cleanup_thread = NULL; |
a5ab9e05 | 2945 | struct timer_thread_parameters timer_thread_parameters; |
a430759b JG |
2946 | /* Rotation thread handle. */ |
2947 | struct rotation_thread_handle *rotation_thread_handle = NULL; | |
d086f507 JD |
2948 | /* Queue of rotation jobs populated by the sessiond-timer. */ |
2949 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
050e613c | 2950 | struct lttng_thread *client_thread = NULL; |
fac6795d | 2951 | |
335a95b7 MD |
2952 | init_kernel_workarounds(); |
2953 | ||
f6a9efaa DG |
2954 | rcu_register_thread(); |
2955 | ||
4a15001e MD |
2956 | if (set_signal_handler()) { |
2957 | retval = -1; | |
2958 | goto exit_set_signal_handler; | |
0bb7724a DG |
2959 | } |
2960 | ||
82528808 | 2961 | if (timer_signal_init()) { |
d086f507 JD |
2962 | retval = -1; |
2963 | goto exit_set_signal_handler; | |
2964 | } | |
2965 | ||
12744796 DG |
2966 | page_size = sysconf(_SC_PAGESIZE); |
2967 | if (page_size < 0) { | |
2968 | PERROR("sysconf _SC_PAGESIZE"); | |
2969 | page_size = LONG_MAX; | |
2970 | WARN("Fallback page size to %ld", page_size); | |
2971 | } | |
2972 | ||
e6142f2e JG |
2973 | ret = sessiond_config_init(&config); |
2974 | if (ret) { | |
2975 | retval = -1; | |
2976 | goto exit_set_signal_handler; | |
2977 | } | |
2978 | ||
2788b494 JR |
2979 | /* |
2980 | * Init config from environment variables. | |
2981 | * Command line option override env configuration per-doc. Do env first. | |
2982 | */ | |
2983 | sessiond_config_apply_env_config(&config); | |
2984 | ||
4a15001e MD |
2985 | /* |
2986 | * Parse arguments and load the daemon configuration file. | |
2987 | * | |
2988 | * We have an exit_options exit path to free memory reserved by | |
2989 | * set_options. This is needed because the rest of sessiond_cleanup() | |
2990 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
2991 | * depends on set_options. | |
2992 | */ | |
fac6795d | 2993 | progname = argv[0]; |
4a15001e MD |
2994 | if (set_options(argc, argv)) { |
2995 | retval = -1; | |
2996 | goto exit_options; | |
fac6795d DG |
2997 | } |
2998 | ||
e6142f2e JG |
2999 | /* |
3000 | * Resolve all paths received as arguments, configuration option, or | |
3001 | * through environment variable as absolute paths. This is necessary | |
3002 | * since daemonizing causes the sessiond's current working directory | |
3003 | * to '/'. | |
3004 | */ | |
3005 | ret = sessiond_config_resolve_paths(&config); | |
3006 | if (ret) { | |
3007 | goto exit_options; | |
3008 | } | |
3009 | ||
3010 | /* Apply config. */ | |
3011 | lttng_opt_verbose = config.verbose; | |
3012 | lttng_opt_quiet = config.quiet; | |
3013 | kconsumer_data.err_unix_sock_path = | |
3014 | config.kconsumerd_err_unix_sock_path.value; | |
3015 | kconsumer_data.cmd_unix_sock_path = | |
3016 | config.kconsumerd_cmd_unix_sock_path.value; | |
3017 | ustconsumer32_data.err_unix_sock_path = | |
3018 | config.consumerd32_err_unix_sock_path.value; | |
3019 | ustconsumer32_data.cmd_unix_sock_path = | |
3020 | config.consumerd32_cmd_unix_sock_path.value; | |
3021 | ustconsumer64_data.err_unix_sock_path = | |
3022 | config.consumerd64_err_unix_sock_path.value; | |
3023 | ustconsumer64_data.cmd_unix_sock_path = | |
3024 | config.consumerd64_cmd_unix_sock_path.value; | |
3025 | set_clock_plugin_env(); | |
3026 | ||
3027 | sessiond_config_log(&config); | |
3028 | ||
f472090a JG |
3029 | if (create_lttng_rundir()) { |
3030 | retval = -1; | |
3031 | goto exit_options; | |
3032 | } | |
3033 | ||
3034 | /* Abort launch if a session daemon is already running. */ | |
3035 | if (check_existing_daemon()) { | |
3036 | ERR("A session daemon is already running."); | |
3037 | retval = -1; | |
3038 | goto exit_options; | |
3039 | } | |
3040 | ||
fac6795d | 3041 | /* Daemonize */ |
e6142f2e | 3042 | if (config.daemonize || config.background) { |
ceed52b5 MD |
3043 | int i; |
3044 | ||
72dd7491 | 3045 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 3046 | !config.background); |
53094c05 | 3047 | if (ret < 0) { |
4a15001e MD |
3048 | retval = -1; |
3049 | goto exit_options; | |
53094c05 | 3050 | } |
0bb7724a | 3051 | |
ceed52b5 | 3052 | /* |
0bb7724a | 3053 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 3054 | * closed, in case we are called with more opened file |
f472090a | 3055 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
3056 | */ |
3057 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
3058 | if (i == lockfile_fd) { |
3059 | continue; | |
3060 | } | |
ceed52b5 MD |
3061 | (void) close(i); |
3062 | } | |
3063 | } | |
3064 | ||
7567352f MD |
3065 | if (run_as_create_worker(argv[0]) < 0) { |
3066 | goto exit_create_run_as_worker_cleanup; | |
3067 | } | |
3068 | ||
4a15001e MD |
3069 | /* |
3070 | * Starting from here, we can create threads. This needs to be after | |
3071 | * lttng_daemonize due to RCU. | |
3072 | */ | |
3073 | ||
3074 | /* | |
3075 | * Initialize the health check subsystem. This call should set the | |
3076 | * appropriate time values. | |
3077 | */ | |
3078 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
3079 | if (!health_sessiond) { | |
3080 | PERROR("health_app_create error"); | |
3081 | retval = -1; | |
3082 | goto exit_health_sessiond_cleanup; | |
3083 | } | |
3084 | ||
4a15001e | 3085 | /* Create thread to clean up RCU hash tables */ |
548468b9 JG |
3086 | ht_cleanup_thread = launch_ht_cleanup_thread(); |
3087 | if (!ht_cleanup_thread) { | |
4a15001e MD |
3088 | retval = -1; |
3089 | goto exit_ht_cleanup; | |
3090 | } | |
3091 | ||
ceed52b5 | 3092 | /* Create thread quit pipe */ |
51bb4dbb | 3093 | if (sessiond_init_thread_quit_pipe()) { |
4a15001e MD |
3094 | retval = -1; |
3095 | goto exit_init_data; | |
fac6795d DG |
3096 | } |
3097 | ||
3098 | /* Check if daemon is UID = 0 */ | |
3099 | is_root = !getuid(); | |
fac6795d | 3100 | if (is_root) { |
67e40797 | 3101 | /* Create global run dir with root access */ |
67e40797 | 3102 | |
b3530820 JG |
3103 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
3104 | if (!kernel_channel_monitor_pipe) { | |
3105 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
3106 | retval = -1; | |
3107 | goto exit_init_data; | |
3108 | } | |
3109 | kconsumer_data.channel_monitor_pipe = | |
3110 | lttng_pipe_release_writefd( | |
3111 | kernel_channel_monitor_pipe); | |
3112 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
3113 | retval = -1; | |
3114 | goto exit_init_data; | |
3115 | } | |
fac6795d DG |
3116 | } |
3117 | ||
5c827ce0 DG |
3118 | /* Set consumer initial state */ |
3119 | kernel_consumerd_state = CONSUMER_STOPPED; | |
3120 | ust_consumerd_state = CONSUMER_STOPPED; | |
3121 | ||
b3530820 JG |
3122 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
3123 | if (!ust32_channel_monitor_pipe) { | |
3124 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
3125 | retval = -1; | |
3126 | goto exit_init_data; | |
3127 | } | |
3128 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
3129 | ust32_channel_monitor_pipe); | |
3130 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
3131 | retval = -1; | |
3132 | goto exit_init_data; | |
3133 | } | |
62c43103 | 3134 | |
d086f507 | 3135 | /* |
82528808 JG |
3136 | * The rotation_thread_timer_queue structure is shared between the |
3137 | * sessiond timer thread and the rotation thread. The main thread keeps | |
3138 | * its ownership and destroys it when both threads have been joined. | |
d086f507 | 3139 | */ |
82528808 | 3140 | rotation_timer_queue = rotation_thread_timer_queue_create(); |
d086f507 JD |
3141 | if (!rotation_timer_queue) { |
3142 | retval = -1; | |
3143 | goto exit_init_data; | |
3144 | } | |
a5ab9e05 JG |
3145 | timer_thread_parameters.rotation_thread_job_queue = |
3146 | rotation_timer_queue; | |
67e40797 | 3147 | |
b3530820 JG |
3148 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
3149 | if (!ust64_channel_monitor_pipe) { | |
3150 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
3151 | retval = -1; | |
3152 | goto exit_init_data; | |
3153 | } | |
3154 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
3155 | ust64_channel_monitor_pipe); | |
3156 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
3157 | retval = -1; | |
3158 | goto exit_init_data; | |
3159 | } | |
847177cd | 3160 | |
1427f9b2 DG |
3161 | /* |
3162 | * Init UST app hash table. Alloc hash table before this point since | |
3163 | * cleanup() can get called after that point. | |
3164 | */ | |
4a15001e | 3165 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 3166 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
3167 | retval = -1; |
3168 | goto exit_init_data; | |
3169 | } | |
1427f9b2 | 3170 | |
6a4e4039 JG |
3171 | /* |
3172 | * Initialize agent app hash table. We allocate the hash table here | |
3173 | * since cleanup() can get called after this point. | |
3174 | */ | |
3175 | if (agent_app_ht_alloc()) { | |
3176 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
3177 | retval = -1; |
3178 | goto exit_init_data; | |
f20baf8e DG |
3179 | } |
3180 | ||
a88df331 DG |
3181 | /* |
3182 | * These actions must be executed as root. We do that *after* setting up | |
3183 | * the sockets path because we MUST make the check for another daemon using | |
3184 | * those paths *before* trying to set the kernel consumer sockets and init | |
3185 | * kernel tracer. | |
3186 | */ | |
3187 | if (is_root) { | |
e6142f2e | 3188 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
3189 | retval = -1; |
3190 | goto exit_init_data; | |
7753dea8 MD |
3191 | } |
3192 | ||
a88df331 | 3193 | /* Setup kernel tracer */ |
e6142f2e | 3194 | if (!config.no_kernel) { |
4fba7219 | 3195 | init_kernel_tracer(); |
89588270 DG |
3196 | if (kernel_tracer_fd >= 0) { |
3197 | ret = syscall_init_table(); | |
3198 | if (ret < 0) { | |
4a15001e MD |
3199 | ERR("Unable to populate syscall table. " |
3200 | "Syscall tracing won't work " | |
3201 | "for this session daemon."); | |
89588270 | 3202 | } |
834978fd | 3203 | } |
4fba7219 | 3204 | } |
a88df331 DG |
3205 | |
3206 | /* Set ulimit for open files */ | |
3207 | set_ulimit(); | |
fac6795d | 3208 | } |
4063050c MD |
3209 | /* init lttng_fd tracking must be done after set_ulimit. */ |
3210 | lttng_fd_init(); | |
fac6795d | 3211 | |
e6142f2e | 3212 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
3213 | retval = -1; |
3214 | goto exit_init_data; | |
67e40797 DG |
3215 | } |
3216 | ||
e6142f2e | 3217 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
3218 | retval = -1; |
3219 | goto exit_init_data; | |
67e40797 DG |
3220 | } |
3221 | ||
d6f42150 | 3222 | /* Setup the needed unix socket */ |
4a15001e MD |
3223 | if (init_daemon_socket()) { |
3224 | retval = -1; | |
3225 | goto exit_init_data; | |
fac6795d DG |
3226 | } |
3227 | ||
3228 | /* Set credentials to socket */ | |
e6142f2e | 3229 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
3230 | retval = -1; |
3231 | goto exit_init_data; | |
fac6795d DG |
3232 | } |
3233 | ||
5b8719f5 | 3234 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 3235 | if (config.sig_parent) { |
5b8719f5 DG |
3236 | ppid = getppid(); |
3237 | } | |
3238 | ||
7a485870 | 3239 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 3240 | if (is_root && !config.no_kernel) { |
4a15001e MD |
3241 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
3242 | retval = -1; | |
3243 | goto exit_init_data; | |
6620da75 | 3244 | } |
7a485870 DG |
3245 | } |
3246 | ||
099e26bd | 3247 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
3248 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
3249 | retval = -1; | |
3250 | goto exit_init_data; | |
099e26bd DG |
3251 | } |
3252 | ||
d0b96690 | 3253 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
3254 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
3255 | retval = -1; | |
3256 | goto exit_init_data; | |
d0b96690 DG |
3257 | } |
3258 | ||
7972aab2 DG |
3259 | /* Initialize global buffer per UID and PID registry. */ |
3260 | buffer_reg_init_uid_registry(); | |
3261 | buffer_reg_init_pid_registry(); | |
3262 | ||
099e26bd | 3263 | /* Init UST command queue. */ |
8bdee6e2 | 3264 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 3265 | |
2f77fc4b | 3266 | cmd_init(); |
00e2e675 | 3267 | |
ae9e45b3 DG |
3268 | /* Check for the application socket timeout env variable. */ |
3269 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
3270 | if (env_app_timeout) { | |
e6142f2e | 3271 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 3272 | } else { |
e6142f2e | 3273 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
3274 | } |
3275 | ||
4a15001e MD |
3276 | ret = write_pidfile(); |
3277 | if (ret) { | |
3278 | ERR("Error in write_pidfile"); | |
3279 | retval = -1; | |
3280 | goto exit_init_data; | |
3281 | } | |
35f90c40 | 3282 | |
554831e7 MD |
3283 | /* Initialize communication library */ |
3284 | lttcomm_init(); | |
4a15001e | 3285 | /* Initialize TCP timeout values */ |
d831c249 | 3286 | lttcomm_inet_init(); |
554831e7 | 3287 | |
ef367a93 | 3288 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
3289 | retval = -1; |
3290 | goto exit_init_data; | |
ef367a93 | 3291 | } |
e6142f2e | 3292 | load_info->path = config.load_session_path.value; |
ef367a93 | 3293 | |
12b4fb37 | 3294 | /* Create health-check thread. */ |
225221a8 | 3295 | if (!launch_health_management_thread()) { |
4a15001e | 3296 | retval = -1; |
44a5e5eb DG |
3297 | goto exit_health; |
3298 | } | |
3299 | ||
b3530820 JG |
3300 | /* notification_thread_data acquires the pipes' read side. */ |
3301 | notification_thread_handle = notification_thread_handle_create( | |
3302 | ust32_channel_monitor_pipe, | |
3303 | ust64_channel_monitor_pipe, | |
8898b0da | 3304 | kernel_channel_monitor_pipe); |
b3530820 JG |
3305 | if (!notification_thread_handle) { |
3306 | retval = -1; | |
3307 | ERR("Failed to create notification thread shared data"); | |
b3530820 JG |
3308 | goto exit_notification; |
3309 | } | |
3310 | ||
3311 | /* Create notification thread. */ | |
8898b0da | 3312 | if (!launch_notification_thread(notification_thread_handle)) { |
b3530820 | 3313 | retval = -1; |
b3530820 JG |
3314 | goto exit_notification; |
3315 | } | |
3316 | ||
d086f507 | 3317 | /* Create timer thread. */ |
a5ab9e05 | 3318 | if (!launch_timer_thread(&timer_thread_parameters)) { |
d086f507 | 3319 | retval = -1; |
d086f507 JD |
3320 | goto exit_notification; |
3321 | } | |
d086f507 | 3322 | |
db66e574 JD |
3323 | /* rotation_thread_data acquires the pipes' read side. */ |
3324 | rotation_thread_handle = rotation_thread_handle_create( | |
90936dcf | 3325 | rotation_timer_queue, |
8898b0da | 3326 | notification_thread_handle); |
db66e574 JD |
3327 | if (!rotation_thread_handle) { |
3328 | retval = -1; | |
3329 | ERR("Failed to create rotation thread shared data"); | |
3330 | stop_threads(); | |
3331 | goto exit_rotation; | |
3332 | } | |
db66e574 JD |
3333 | |
3334 | /* Create rotation thread. */ | |
a430759b | 3335 | if (!launch_rotation_thread(rotation_thread_handle)) { |
db66e574 | 3336 | retval = -1; |
db66e574 JD |
3337 | goto exit_rotation; |
3338 | } | |
3339 | ||
cf3af59e | 3340 | /* Create thread to manage the client socket */ |
050e613c JG |
3341 | client_thread = launch_client_thread(); |
3342 | if (!client_thread) { | |
4a15001e | 3343 | retval = -1; |
cf3af59e MD |
3344 | goto exit_client; |
3345 | } | |
fac6795d | 3346 | |
099e26bd | 3347 | /* Create thread to dispatch registration */ |
1a1a34b4 | 3348 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 3349 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
3350 | if (ret) { |
3351 | errno = ret; | |
76d7553f | 3352 | PERROR("pthread_create dispatch"); |
4a15001e | 3353 | retval = -1; |
b3530820 | 3354 | stop_threads(); |
099e26bd DG |
3355 | goto exit_dispatch; |
3356 | } | |
3357 | ||
3358 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 3359 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 3360 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
3361 | if (ret) { |
3362 | errno = ret; | |
76d7553f | 3363 | PERROR("pthread_create registration"); |
4a15001e | 3364 | retval = -1; |
b3530820 | 3365 | stop_threads(); |
099e26bd DG |
3366 | goto exit_reg_apps; |
3367 | } | |
3368 | ||
cf3af59e | 3369 | /* Create thread to manage application socket */ |
1a1a34b4 | 3370 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 3371 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
3372 | if (ret) { |
3373 | errno = ret; | |
d0b96690 | 3374 | PERROR("pthread_create apps"); |
4a15001e | 3375 | retval = -1; |
b3530820 | 3376 | stop_threads(); |
d0b96690 DG |
3377 | goto exit_apps; |
3378 | } | |
3379 | ||
3380 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 3381 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 3382 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
3383 | if (ret) { |
3384 | errno = ret; | |
f5c32ef1 | 3385 | PERROR("pthread_create notify"); |
4a15001e | 3386 | retval = -1; |
b3530820 | 3387 | stop_threads(); |
9563b0ad | 3388 | goto exit_apps_notify; |
cf3af59e | 3389 | } |
fac6795d | 3390 | |
022d91ba | 3391 | /* Create agent registration thread. */ |
1a1a34b4 | 3392 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 3393 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
3394 | if (ret) { |
3395 | errno = ret; | |
022d91ba | 3396 | PERROR("pthread_create agent"); |
4a15001e | 3397 | retval = -1; |
b3530820 | 3398 | stop_threads(); |
022d91ba | 3399 | goto exit_agent_reg; |
4d076222 DG |
3400 | } |
3401 | ||
6620da75 | 3402 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 3403 | if (is_root && !config.no_kernel) { |
6620da75 | 3404 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 3405 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 3406 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
3407 | if (ret) { |
3408 | errno = ret; | |
6620da75 | 3409 | PERROR("pthread_create kernel"); |
4a15001e | 3410 | retval = -1; |
b3530820 | 3411 | stop_threads(); |
6620da75 DG |
3412 | goto exit_kernel; |
3413 | } | |
ef367a93 | 3414 | } |
7a485870 | 3415 | |
4a15001e | 3416 | /* Create session loading thread. */ |
1a1a34b4 MJ |
3417 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
3418 | thread_load_session, load_info); | |
4a15001e MD |
3419 | if (ret) { |
3420 | errno = ret; | |
3421 | PERROR("pthread_create load_session_thread"); | |
3422 | retval = -1; | |
b3530820 | 3423 | stop_threads(); |
4a15001e MD |
3424 | goto exit_load_session; |
3425 | } | |
3426 | ||
3427 | /* | |
3428 | * This is where we start awaiting program completion (e.g. through | |
3429 | * signal that asks threads to teardown). | |
3430 | */ | |
3431 | ||
3432 | ret = pthread_join(load_session_thread, &status); | |
3433 | if (ret) { | |
3434 | errno = ret; | |
3435 | PERROR("pthread_join load_session_thread"); | |
3436 | retval = -1; | |
3437 | } | |
6af972a2 JG |
3438 | |
3439 | /* Initiate teardown once activity occurs on the quit pipe. */ | |
3440 | sessiond_wait_for_quit_pipe(-1U); | |
050e613c JG |
3441 | |
3442 | /* | |
3443 | * Ensure that the client thread is no longer accepting new commands, | |
3444 | * which could cause new sessions to be created. | |
3445 | */ | |
3446 | if (!lttng_thread_shutdown(client_thread)) { | |
3447 | ERR("Failed to shutdown the client thread, continuing teardown"); | |
3448 | lttng_thread_put(client_thread); | |
3449 | client_thread = NULL; | |
3450 | } | |
3451 | ||
6af972a2 | 3452 | destroy_all_sessions_and_wait(); |
4a15001e | 3453 | exit_load_session: |
ef367a93 | 3454 | |
e6142f2e | 3455 | if (is_root && !config.no_kernel) { |
6620da75 | 3456 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
3457 | if (ret) { |
3458 | errno = ret; | |
6620da75 | 3459 | PERROR("pthread_join"); |
4a15001e | 3460 | retval = -1; |
6620da75 | 3461 | } |
fac6795d | 3462 | } |
cf3af59e | 3463 | exit_kernel: |
4a15001e | 3464 | |
022d91ba | 3465 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
3466 | if (ret) { |
3467 | errno = ret; | |
022d91ba | 3468 | PERROR("pthread_join agent"); |
4a15001e | 3469 | retval = -1; |
4d076222 | 3470 | } |
022d91ba | 3471 | exit_agent_reg: |
4a15001e | 3472 | |
9563b0ad | 3473 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
3474 | if (ret) { |
3475 | errno = ret; | |
9563b0ad | 3476 | PERROR("pthread_join apps notify"); |
4a15001e | 3477 | retval = -1; |
9563b0ad | 3478 | } |
9563b0ad | 3479 | exit_apps_notify: |
4a15001e | 3480 | |
cf3af59e | 3481 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
3482 | if (ret) { |
3483 | errno = ret; | |
9563b0ad | 3484 | PERROR("pthread_join apps"); |
4a15001e | 3485 | retval = -1; |
cf3af59e | 3486 | } |
cf3af59e | 3487 | exit_apps: |
4a15001e | 3488 | |
099e26bd | 3489 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
3490 | if (ret) { |
3491 | errno = ret; | |
76d7553f | 3492 | PERROR("pthread_join"); |
4a15001e | 3493 | retval = -1; |
099e26bd | 3494 | } |
099e26bd | 3495 | exit_reg_apps: |
4a15001e | 3496 | |
772b8f4d MD |
3497 | /* |
3498 | * Join dispatch thread after joining reg_apps_thread to ensure | |
3499 | * we don't leak applications in the queue. | |
3500 | */ | |
099e26bd | 3501 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
3502 | if (ret) { |
3503 | errno = ret; | |
76d7553f | 3504 | PERROR("pthread_join"); |
4a15001e | 3505 | retval = -1; |
099e26bd | 3506 | } |
099e26bd | 3507 | exit_dispatch: |
b3530820 | 3508 | exit_client: |
db66e574 | 3509 | exit_rotation: |
b3530820 | 3510 | exit_notification: |
548468b9 | 3511 | lttng_thread_list_shutdown_orphans(); |
b3530820 | 3512 | exit_health: |
4a15001e | 3513 | exit_init_data: |
050e613c JG |
3514 | if (client_thread) { |
3515 | lttng_thread_put(client_thread); | |
3516 | } | |
3517 | ||
4d62fbf8 MD |
3518 | /* |
3519 | * Wait for all pending call_rcu work to complete before tearing | |
3520 | * down data structures. call_rcu worker may be trying to | |
3521 | * perform lookups in those structures. | |
3522 | */ | |
3523 | rcu_barrier(); | |
4a15001e MD |
3524 | /* |
3525 | * sessiond_cleanup() is called when no other thread is running, except | |
3526 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
3527 | */ | |
3528 | rcu_thread_online(); | |
3529 | sessiond_cleanup(); | |
06f525de | 3530 | |
c4d5de9d JG |
3531 | /* |
3532 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
3533 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
3534 | * the queue is empty before shutting down the clean-up thread. | |
3535 | */ | |
3536 | rcu_barrier(); | |
3537 | ||
548468b9 JG |
3538 | if (ht_cleanup_thread) { |
3539 | lttng_thread_shutdown(ht_cleanup_thread); | |
3540 | lttng_thread_put(ht_cleanup_thread); | |
3541 | } | |
3542 | ||
a430759b JG |
3543 | rcu_thread_offline(); |
3544 | rcu_unregister_thread(); | |
3545 | ||
3546 | if (rotation_thread_handle) { | |
3547 | rotation_thread_handle_destroy(rotation_thread_handle); | |
3548 | } | |
3549 | ||
d086f507 JD |
3550 | /* |
3551 | * After the rotation and timer thread have quit, we can safely destroy | |
3552 | * the rotation_timer_queue. | |
3553 | */ | |
82528808 | 3554 | rotation_thread_timer_queue_destroy(rotation_timer_queue); |
8898b0da JG |
3555 | /* |
3556 | * The teardown of the notification system is performed after the | |
3557 | * session daemon's teardown in order to allow it to be notified | |
3558 | * of the active session and channels at the moment of the teardown. | |
3559 | */ | |
3560 | if (notification_thread_handle) { | |
3561 | notification_thread_handle_destroy(notification_thread_handle); | |
3562 | } | |
b3530820 JG |
3563 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
3564 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
3565 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
0b2dc8df | 3566 | exit_ht_cleanup: |
4a15001e | 3567 | |
4a15001e MD |
3568 | health_app_destroy(health_sessiond); |
3569 | exit_health_sessiond_cleanup: | |
7567352f | 3570 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
3571 | |
3572 | exit_options: | |
f472090a | 3573 | sessiond_cleanup_lock_file(); |
4a15001e MD |
3574 | sessiond_cleanup_options(); |
3575 | ||
3576 | exit_set_signal_handler: | |
3577 | if (!retval) { | |
cf3af59e | 3578 | exit(EXIT_SUCCESS); |
4a15001e MD |
3579 | } else { |
3580 | exit(EXIT_FAILURE); | |
67e40797 | 3581 | } |
fac6795d | 3582 | } |