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> |
fac6795d | 52 | |
10a8a223 | 53 | #include "lttng-sessiond.h" |
7972aab2 | 54 | #include "buffer-registry.h" |
54d01ffb | 55 | #include "channel.h" |
2f77fc4b | 56 | #include "cmd.h" |
00e2e675 | 57 | #include "consumer.h" |
099e26bd | 58 | #include "context.h" |
54d01ffb | 59 | #include "event.h" |
4771f025 | 60 | #include "kernel.h" |
f1e16794 | 61 | #include "kernel-consumer.h" |
096102bd | 62 | #include "modprobe.h" |
0fdd1e2c | 63 | #include "shm.h" |
1e307fab | 64 | #include "ust-ctl.h" |
00e2e675 | 65 | #include "ust-consumer.h" |
8e68d1c8 | 66 | #include "utils.h" |
4063050c | 67 | #include "fd-limit.h" |
8782cc74 | 68 | #include "health-sessiond.h" |
8ac94142 | 69 | #include "testpoint.h" |
d0b96690 | 70 | #include "ust-thread.h" |
022d91ba | 71 | #include "agent-thread.h" |
fb198a11 | 72 | #include "save.h" |
ef367a93 | 73 | #include "load-session-thread.h" |
b3530820 JG |
74 | #include "notification-thread.h" |
75 | #include "notification-thread-commands.h" | |
db66e574 | 76 | #include "rotation-thread.h" |
0dbc2034 | 77 | #include "lttng-syscall.h" |
7c1d2758 | 78 | #include "agent.h" |
5e97de00 | 79 | #include "ht-cleanup.h" |
e6142f2e | 80 | #include "sessiond-config.h" |
d086f507 | 81 | #include "sessiond-timer.h" |
ebaeda94 | 82 | |
4fc83d94 PP |
83 | static const char *help_msg = |
84 | #ifdef LTTNG_EMBED_HELP | |
85 | #include <lttng-sessiond.8.h> | |
86 | #else | |
87 | NULL | |
88 | #endif | |
89 | ; | |
90 | ||
fac6795d | 91 | const char *progname; |
1d4b027a | 92 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 93 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
c9cb3e7d | 94 | static int lockfile_fd = -1; |
3bd1e081 | 95 | |
0bb7724a DG |
96 | /* Set to 1 when a SIGUSR1 signal is received. */ |
97 | static int recv_child_signal; | |
98 | ||
88076e89 JD |
99 | static struct lttng_kernel_tracer_version kernel_tracer_version; |
100 | static struct lttng_kernel_tracer_abi_version kernel_tracer_abi_version; | |
101 | ||
a23ec3a7 DG |
102 | /* |
103 | * Consumer daemon specific control data. Every value not initialized here is | |
104 | * set to 0 by the static definition. | |
105 | */ | |
3bd1e081 MD |
106 | static struct consumer_data kconsumer_data = { |
107 | .type = LTTNG_CONSUMER_KERNEL, | |
03550b58 MD |
108 | .err_sock = -1, |
109 | .cmd_sock = -1, | |
b3530820 | 110 | .channel_monitor_pipe = -1, |
62c43103 | 111 | .channel_rotate_pipe = -1, |
173af62f DG |
112 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
113 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
114 | .cond = PTHREAD_COND_INITIALIZER, |
115 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 116 | }; |
7753dea8 MD |
117 | static struct consumer_data ustconsumer64_data = { |
118 | .type = LTTNG_CONSUMER64_UST, | |
03550b58 MD |
119 | .err_sock = -1, |
120 | .cmd_sock = -1, | |
b3530820 | 121 | .channel_monitor_pipe = -1, |
62c43103 | 122 | .channel_rotate_pipe = -1, |
173af62f DG |
123 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
124 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
125 | .cond = PTHREAD_COND_INITIALIZER, |
126 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
127 | }; |
128 | static struct consumer_data ustconsumer32_data = { | |
129 | .type = LTTNG_CONSUMER32_UST, | |
03550b58 MD |
130 | .err_sock = -1, |
131 | .cmd_sock = -1, | |
b3530820 | 132 | .channel_monitor_pipe = -1, |
62c43103 | 133 | .channel_rotate_pipe = -1, |
173af62f DG |
134 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
135 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
136 | .cond = PTHREAD_COND_INITIALIZER, |
137 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
138 | }; |
139 | ||
26296c48 JG |
140 | /* Command line options */ |
141 | static const struct option long_options[] = { | |
0f5ea17c JG |
142 | { "client-sock", required_argument, 0, 'c' }, |
143 | { "apps-sock", required_argument, 0, 'a' }, | |
144 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
145 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
146 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
147 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
148 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
149 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
150 | { "consumerd32-path", required_argument, 0, '\0' }, | |
151 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
152 | { "consumerd64-path", required_argument, 0, '\0' }, | |
153 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
154 | { "daemonize", no_argument, 0, 'd' }, | |
155 | { "background", no_argument, 0, 'b' }, | |
156 | { "sig-parent", no_argument, 0, 'S' }, | |
157 | { "help", no_argument, 0, 'h' }, | |
158 | { "group", required_argument, 0, 'g' }, | |
159 | { "version", no_argument, 0, 'V' }, | |
160 | { "quiet", no_argument, 0, 'q' }, | |
161 | { "verbose", no_argument, 0, 'v' }, | |
162 | { "verbose-consumer", no_argument, 0, '\0' }, | |
163 | { "no-kernel", no_argument, 0, '\0' }, | |
164 | { "pidfile", required_argument, 0, 'p' }, | |
165 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
166 | { "config", required_argument, 0, 'f' }, | |
167 | { "load", required_argument, 0, 'l' }, | |
168 | { "kmod-probes", required_argument, 0, '\0' }, | |
169 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
170 | { NULL, 0, 0, 0 } |
171 | }; | |
172 | ||
e6142f2e JG |
173 | struct sessiond_config config; |
174 | ||
26296c48 JG |
175 | /* Command line options to ignore from configuration file */ |
176 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
177 | ||
26c9d55e | 178 | /* Shared between threads */ |
099e26bd | 179 | static int dispatch_thread_exit; |
fac6795d | 180 | |
1d4b027a | 181 | /* Sockets and FDs */ |
a4b35e07 MD |
182 | static int client_sock = -1; |
183 | static int apps_sock = -1; | |
2f77fc4b | 184 | int kernel_tracer_fd = -1; |
76d7553f | 185 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 186 | |
273ea72c DG |
187 | /* |
188 | * Quit pipe for all threads. This permits a single cancellation point | |
189 | * for all threads when receiving an event on the pipe. | |
190 | */ | |
76d7553f | 191 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 192 | |
099e26bd DG |
193 | /* |
194 | * This pipe is used to inform the thread managing application communication | |
195 | * that a command is queued and ready to be processed. | |
196 | */ | |
76d7553f | 197 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 198 | |
d0b96690 DG |
199 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
200 | ||
1d4b027a | 201 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 202 | static pthread_t apps_thread; |
d0b96690 | 203 | static pthread_t apps_notify_thread; |
099e26bd | 204 | static pthread_t reg_apps_thread; |
1d4b027a | 205 | static pthread_t client_thread; |
7a485870 | 206 | static pthread_t kernel_thread; |
099e26bd | 207 | static pthread_t dispatch_thread; |
44a5e5eb | 208 | static pthread_t health_thread; |
0b2dc8df | 209 | static pthread_t ht_cleanup_thread; |
022d91ba | 210 | static pthread_t agent_reg_thread; |
ef367a93 | 211 | static pthread_t load_session_thread; |
b3530820 | 212 | static pthread_t notification_thread; |
db66e574 | 213 | static pthread_t rotation_thread; |
d086f507 | 214 | static pthread_t timer_thread; |
5eb91c98 | 215 | |
099e26bd DG |
216 | /* |
217 | * UST registration command queue. This queue is tied with a futex and uses a N | |
218 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
219 | * | |
b22c5da8 DG |
220 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
221 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
222 | * the line new application socket and monitors it for any I/O error or clean | |
223 | * close that triggers an unregistration of the application. | |
099e26bd DG |
224 | */ |
225 | static struct ust_cmd_queue ust_cmd_queue; | |
226 | ||
b5541356 DG |
227 | /* |
228 | * Pointer initialized before thread creation. | |
229 | * | |
230 | * This points to the tracing session list containing the session count and a | |
231 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
232 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 233 | * |
d063d709 | 234 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 235 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
236 | */ |
237 | static struct ltt_session_list *session_list_ptr; | |
238 | ||
7753dea8 MD |
239 | int ust_consumerd64_fd = -1; |
240 | int ust_consumerd32_fd = -1; | |
241 | ||
2f77fc4b DG |
242 | static const char *module_proc_lttng = "/proc/lttng"; |
243 | ||
5c827ce0 DG |
244 | /* |
245 | * Consumer daemon state which is changed when spawning it, killing it or in | |
246 | * case of a fatal error. | |
247 | */ | |
248 | enum consumerd_state { | |
249 | CONSUMER_STARTED = 1, | |
250 | CONSUMER_STOPPED = 2, | |
251 | CONSUMER_ERROR = 3, | |
252 | }; | |
253 | ||
254 | /* | |
255 | * This consumer daemon state is used to validate if a client command will be | |
256 | * able to reach the consumer. If not, the client is informed. For instance, | |
257 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
258 | * error to the client. | |
259 | * | |
260 | * The following example shows a possible race condition of this scheme: | |
261 | * | |
262 | * consumer thread error happens | |
263 | * client cmd arrives | |
264 | * client cmd checks state -> still OK | |
265 | * consumer thread exit, sets error | |
266 | * client cmd try to talk to consumer | |
267 | * ... | |
268 | * | |
269 | * However, since the consumer is a different daemon, we have no way of making | |
270 | * sure the command will reach it safely even with this state flag. This is why | |
271 | * we consider that up to the state validation during command processing, the | |
272 | * command is safe. After that, we can not guarantee the correctness of the | |
273 | * client request vis-a-vis the consumer. | |
274 | */ | |
275 | static enum consumerd_state ust_consumerd_state; | |
276 | static enum consumerd_state kernel_consumerd_state; | |
277 | ||
12744796 DG |
278 | /* Set in main() with the current page size. */ |
279 | long page_size; | |
280 | ||
8782cc74 MD |
281 | /* Application health monitoring */ |
282 | struct health_app *health_sessiond; | |
283 | ||
f43f95a9 DG |
284 | /* Am I root or not. */ |
285 | int is_root; /* Set to 1 if the daemon is running as root */ | |
286 | ||
26296c48 JG |
287 | const char * const config_section_name = "sessiond"; |
288 | ||
ef367a93 JG |
289 | /* Load session thread information to operate. */ |
290 | struct load_session_thread_data *load_info; | |
291 | ||
b3530820 JG |
292 | /* Notification thread handle. */ |
293 | struct notification_thread_handle *notification_thread_handle; | |
294 | ||
db66e574 JD |
295 | /* Rotation thread handle. */ |
296 | struct rotation_thread_handle *rotation_thread_handle; | |
297 | ||
7c1d2758 JG |
298 | /* Global hash tables */ |
299 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
300 | ||
97bc1426 | 301 | /* |
9cc1ba3b JG |
302 | * The initialization of the session daemon is done in multiple phases. |
303 | * | |
304 | * While all threads are launched near-simultaneously, only some of them | |
305 | * are needed to ensure the session daemon can start to respond to client | |
b3530820 | 306 | * requests. |
9cc1ba3b JG |
307 | * |
308 | * There are two important guarantees that we wish to offer with respect | |
309 | * to the initialisation of the session daemon: | |
310 | * - When the daemonize/background launcher process exits, the sessiond | |
311 | * is fully able to respond to client requests, | |
312 | * - Auto-loaded sessions are visible to clients. | |
313 | * | |
314 | * In order to achieve this, a number of support threads have to be launched | |
315 | * to allow the "client" thread to function properly. Moreover, since the | |
316 | * "load session" thread needs the client thread, we must provide a way | |
317 | * for the "load session" thread to know that the "client" thread is up | |
318 | * and running. | |
319 | * | |
320 | * Hence, the support threads decrement the lttng_sessiond_ready counter | |
321 | * while the "client" threads waits for it to reach 0. Once the "client" thread | |
322 | * unblocks, it posts the message_thread_ready semaphore which allows the | |
323 | * "load session" thread to progress. | |
324 | * | |
325 | * This implies that the "load session" thread is the last to be initialized | |
326 | * and will explicitly call sessiond_signal_parents(), which signals the parents | |
327 | * that the session daemon is fully initialized. | |
328 | * | |
329 | * The four (4) support threads are: | |
330 | * - agent_thread | |
331 | * - notification_thread | |
332 | * - rotation_thread | |
333 | * - health_thread | |
97bc1426 | 334 | */ |
9cc1ba3b | 335 | int lttng_sessiond_ready = 4; |
97bc1426 | 336 | |
5e97de00 JG |
337 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
338 | { | |
339 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
340 | } | |
341 | ||
97bc1426 | 342 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 | 343 | LTTNG_HIDDEN |
9cc1ba3b | 344 | void sessiond_signal_parents(void) |
97bc1426 | 345 | { |
9cc1ba3b JG |
346 | /* |
347 | * Notify parent pid that we are ready to accept command | |
348 | * for client side. This ppid is the one from the | |
349 | * external process that spawned us. | |
350 | */ | |
351 | if (config.sig_parent) { | |
352 | kill(ppid, SIGUSR1); | |
353 | } | |
97bc1426 | 354 | |
9cc1ba3b JG |
355 | /* |
356 | * Notify the parent of the fork() process that we are | |
357 | * ready. | |
358 | */ | |
359 | if (config.daemonize || config.background) { | |
360 | kill(child_ppid, SIGUSR1); | |
97bc1426 MD |
361 | } |
362 | } | |
363 | ||
9cc1ba3b JG |
364 | LTTNG_HIDDEN |
365 | void sessiond_notify_ready(void) | |
366 | { | |
367 | /* | |
368 | * The _return variant is used since the implied memory barriers are | |
369 | * required. | |
370 | */ | |
371 | (void) uatomic_sub_return(<tng_sessiond_ready, 1); | |
372 | } | |
373 | ||
4a15001e MD |
374 | static |
375 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
376 | int *a_pipe) | |
5eb91c98 DG |
377 | { |
378 | int ret; | |
379 | ||
d0b96690 | 380 | assert(events); |
5eb91c98 DG |
381 | |
382 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
383 | if (ret < 0) { | |
384 | goto error; | |
385 | } | |
386 | ||
387 | /* Add quit pipe */ | |
4a15001e | 388 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
389 | if (ret < 0) { |
390 | goto error; | |
391 | } | |
392 | ||
393 | return 0; | |
394 | ||
395 | error: | |
396 | return ret; | |
397 | } | |
398 | ||
4a15001e MD |
399 | /* |
400 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
401 | */ | |
402 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
403 | { | |
404 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
405 | } | |
406 | ||
273ea72c | 407 | /* |
5eb91c98 | 408 | * Init thread quit pipe. |
273ea72c DG |
409 | * |
410 | * Return -1 on error or 0 if all pipes are created. | |
411 | */ | |
4a15001e | 412 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 413 | { |
730389d9 | 414 | int ret, i; |
273ea72c | 415 | |
4a15001e | 416 | ret = pipe(a_pipe); |
273ea72c | 417 | if (ret < 0) { |
730389d9 | 418 | PERROR("thread quit pipe"); |
273ea72c DG |
419 | goto error; |
420 | } | |
421 | ||
730389d9 | 422 | for (i = 0; i < 2; i++) { |
4a15001e | 423 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
424 | if (ret < 0) { |
425 | PERROR("fcntl"); | |
426 | goto error; | |
427 | } | |
428 | } | |
429 | ||
273ea72c DG |
430 | error: |
431 | return ret; | |
432 | } | |
433 | ||
4a15001e MD |
434 | static int init_thread_quit_pipe(void) |
435 | { | |
436 | return __init_thread_quit_pipe(thread_quit_pipe); | |
437 | } | |
438 | ||
099e26bd DG |
439 | /* |
440 | * Stop all threads by closing the thread quit pipe. | |
441 | */ | |
cf3af59e MD |
442 | static void stop_threads(void) |
443 | { | |
5eb91c98 DG |
444 | int ret; |
445 | ||
cf3af59e MD |
446 | /* Stopping all threads */ |
447 | DBG("Terminating all threads"); | |
54d01ffb | 448 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
449 | if (ret < 0) { |
450 | ERR("write error on thread quit pipe"); | |
451 | } | |
452 | ||
099e26bd | 453 | /* Dispatch thread */ |
26c9d55e | 454 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 455 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
456 | } |
457 | ||
e975f9f8 DG |
458 | /* |
459 | * Close every consumer sockets. | |
460 | */ | |
461 | static void close_consumer_sockets(void) | |
462 | { | |
463 | int ret; | |
464 | ||
465 | if (kconsumer_data.err_sock >= 0) { | |
466 | ret = close(kconsumer_data.err_sock); | |
467 | if (ret < 0) { | |
468 | PERROR("kernel consumer err_sock close"); | |
469 | } | |
470 | } | |
471 | if (ustconsumer32_data.err_sock >= 0) { | |
472 | ret = close(ustconsumer32_data.err_sock); | |
473 | if (ret < 0) { | |
a76cbd9f | 474 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
475 | } |
476 | } | |
477 | if (ustconsumer64_data.err_sock >= 0) { | |
478 | ret = close(ustconsumer64_data.err_sock); | |
479 | if (ret < 0) { | |
a76cbd9f | 480 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
481 | } |
482 | } | |
483 | if (kconsumer_data.cmd_sock >= 0) { | |
484 | ret = close(kconsumer_data.cmd_sock); | |
485 | if (ret < 0) { | |
486 | PERROR("kernel consumer cmd_sock close"); | |
487 | } | |
488 | } | |
489 | if (ustconsumer32_data.cmd_sock >= 0) { | |
490 | ret = close(ustconsumer32_data.cmd_sock); | |
491 | if (ret < 0) { | |
a76cbd9f | 492 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
493 | } |
494 | } | |
495 | if (ustconsumer64_data.cmd_sock >= 0) { | |
496 | ret = close(ustconsumer64_data.cmd_sock); | |
497 | if (ret < 0) { | |
a76cbd9f | 498 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
499 | } |
500 | } | |
b3530820 JG |
501 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
502 | ret = close(kconsumer_data.channel_monitor_pipe); | |
503 | if (ret < 0) { | |
504 | PERROR("kernel consumer channel monitor pipe close"); | |
505 | } | |
506 | } | |
507 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
508 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
509 | if (ret < 0) { | |
510 | PERROR("UST consumerd32 channel monitor pipe close"); | |
511 | } | |
512 | } | |
513 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
514 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
515 | if (ret < 0) { | |
516 | PERROR("UST consumerd64 channel monitor pipe close"); | |
517 | } | |
518 | } | |
62c43103 JD |
519 | if (kconsumer_data.channel_rotate_pipe >= 0) { |
520 | ret = close(kconsumer_data.channel_rotate_pipe); | |
521 | if (ret < 0) { | |
522 | PERROR("kernel consumer channel rotate pipe close"); | |
523 | } | |
524 | } | |
525 | if (ustconsumer32_data.channel_rotate_pipe >= 0) { | |
526 | ret = close(ustconsumer32_data.channel_rotate_pipe); | |
527 | if (ret < 0) { | |
528 | PERROR("UST consumerd32 channel rotate pipe close"); | |
529 | } | |
530 | } | |
531 | if (ustconsumer64_data.channel_rotate_pipe >= 0) { | |
532 | ret = close(ustconsumer64_data.channel_rotate_pipe); | |
533 | if (ret < 0) { | |
534 | PERROR("UST consumerd64 channel rotate pipe close"); | |
535 | } | |
536 | } | |
e975f9f8 DG |
537 | } |
538 | ||
4e4714cb JR |
539 | /* |
540 | * Wait on consumer process termination. | |
541 | * | |
542 | * Need to be called with the consumer data lock held or from a context | |
543 | * ensuring no concurrent access to data (e.g: cleanup). | |
544 | */ | |
545 | static void wait_consumer(struct consumer_data *consumer_data) | |
546 | { | |
547 | pid_t ret; | |
548 | int status; | |
549 | ||
550 | if (consumer_data->pid <= 0) { | |
551 | return; | |
552 | } | |
553 | ||
554 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
555 | consumer_data->pid); | |
556 | ret = waitpid(consumer_data->pid, &status, 0); | |
557 | if (ret == -1) { | |
558 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 559 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
560 | ERR("consumerd termination with error: %d", |
561 | WEXITSTATUS(ret)); | |
562 | } | |
563 | consumer_data->pid = 0; | |
564 | } | |
565 | ||
fac6795d | 566 | /* |
4a15001e | 567 | * Cleanup the session daemon's data structures. |
fac6795d | 568 | */ |
4a15001e | 569 | static void sessiond_cleanup(void) |
fac6795d | 570 | { |
ef599319 | 571 | int ret; |
af9737e9 | 572 | struct ltt_session *sess, *stmp; |
fac6795d | 573 | |
4a15001e | 574 | DBG("Cleanup sessiond"); |
e07ae692 | 575 | |
4e449f3f MD |
576 | /* |
577 | * Close the thread quit pipe. It has already done its job, | |
578 | * since we are now called. | |
579 | */ | |
2f77fc4b DG |
580 | utils_close_pipe(thread_quit_pipe); |
581 | ||
35f90c40 | 582 | /* |
e6142f2e JG |
583 | * If config.pid_file_path.value is undefined, the default file will be |
584 | * wiped when removing the rundir. | |
35f90c40 | 585 | */ |
e6142f2e JG |
586 | if (config.pid_file_path.value) { |
587 | ret = remove(config.pid_file_path.value); | |
35f90c40 | 588 | if (ret < 0) { |
e6142f2e | 589 | PERROR("remove pidfile %s", config.pid_file_path.value); |
35f90c40 DG |
590 | } |
591 | } | |
592 | ||
e6142f2e JG |
593 | DBG("Removing sessiond and consumerd content of directory %s", |
594 | config.rundir.value); | |
8c6c56c2 MD |
595 | |
596 | /* sessiond */ | |
e6142f2e JG |
597 | DBG("Removing %s", config.pid_file_path.value); |
598 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 599 | |
e6142f2e JG |
600 | DBG("Removing %s", config.agent_port_file_path.value); |
601 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 602 | |
8c6c56c2 | 603 | /* kconsumerd */ |
e6142f2e JG |
604 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
605 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
606 | ||
607 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
608 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
609 | |
610 | /* ust consumerd 32 */ | |
e6142f2e JG |
611 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
612 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
613 | ||
614 | DBG("Removing directory %s", config.consumerd32_path.value); | |
615 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
616 | |
617 | /* ust consumerd 64 */ | |
e6142f2e JG |
618 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
619 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
620 | ||
621 | DBG("Removing directory %s", config.consumerd64_path.value); | |
622 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 623 | |
99bab54f | 624 | DBG("Cleaning up all sessions"); |
fac6795d | 625 | |
b5541356 | 626 | /* Destroy session list mutex */ |
273ea72c DG |
627 | if (session_list_ptr != NULL) { |
628 | pthread_mutex_destroy(&session_list_ptr->lock); | |
629 | ||
630 | /* Cleanup ALL session */ | |
54d01ffb DG |
631 | cds_list_for_each_entry_safe(sess, stmp, |
632 | &session_list_ptr->head, list) { | |
90936dcf JD |
633 | cmd_destroy_session(sess, kernel_poll_pipe[1], |
634 | notification_thread_handle); | |
273ea72c DG |
635 | } |
636 | } | |
637 | ||
4e4714cb JR |
638 | wait_consumer(&kconsumer_data); |
639 | wait_consumer(&ustconsumer64_data); | |
640 | wait_consumer(&ustconsumer32_data); | |
641 | ||
6a4e4039 JG |
642 | DBG("Cleaning up all agent apps"); |
643 | agent_app_ht_clean(); | |
644 | ||
099e26bd | 645 | DBG("Closing all UST sockets"); |
56fff090 | 646 | ust_app_clean_list(); |
7972aab2 | 647 | buffer_reg_destroy_registries(); |
099e26bd | 648 | |
e6142f2e | 649 | if (is_root && !config.no_kernel) { |
4fba7219 | 650 | DBG2("Closing kernel fd"); |
a4b35e07 | 651 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
652 | ret = close(kernel_tracer_fd); |
653 | if (ret) { | |
654 | PERROR("close"); | |
655 | } | |
a4b35e07 | 656 | } |
2f50c8a3 | 657 | DBG("Unloading kernel modules"); |
096102bd | 658 | modprobe_remove_lttng_all(); |
834978fd | 659 | free(syscall_table); |
2f50c8a3 | 660 | } |
2f77fc4b | 661 | |
e975f9f8 DG |
662 | close_consumer_sockets(); |
663 | ||
ef367a93 JG |
664 | if (load_info) { |
665 | load_session_destroy_data(load_info); | |
666 | free(load_info); | |
667 | } | |
668 | ||
c9cb3e7d JG |
669 | /* |
670 | * We do NOT rmdir rundir because there are other processes | |
671 | * using it, for instance lttng-relayd, which can start in | |
672 | * parallel with this teardown. | |
673 | */ | |
4a15001e MD |
674 | } |
675 | ||
676 | /* | |
677 | * Cleanup the daemon's option data structures. | |
678 | */ | |
679 | static void sessiond_cleanup_options(void) | |
680 | { | |
681 | DBG("Cleaning up options"); | |
682 | ||
e6142f2e | 683 | sessiond_config_fini(&config); |
c9cb3e7d | 684 | |
7567352f | 685 | run_as_destroy_worker(); |
fac6795d DG |
686 | } |
687 | ||
e065084a | 688 | /* |
d063d709 | 689 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 690 | * |
d063d709 | 691 | * Return lttcomm error code. |
e065084a DG |
692 | */ |
693 | static int send_unix_sock(int sock, void *buf, size_t len) | |
694 | { | |
695 | /* Check valid length */ | |
c617c0c6 | 696 | if (len == 0) { |
e065084a DG |
697 | return -1; |
698 | } | |
699 | ||
700 | return lttcomm_send_unix_sock(sock, buf, len); | |
701 | } | |
702 | ||
5461b305 | 703 | /* |
d063d709 | 704 | * Free memory of a command context structure. |
5461b305 | 705 | */ |
a2fb29a5 | 706 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 707 | { |
a2fb29a5 DG |
708 | DBG("Clean command context structure"); |
709 | if (*cmd_ctx) { | |
710 | if ((*cmd_ctx)->llm) { | |
711 | free((*cmd_ctx)->llm); | |
5461b305 | 712 | } |
a2fb29a5 DG |
713 | if ((*cmd_ctx)->lsm) { |
714 | free((*cmd_ctx)->lsm); | |
5461b305 | 715 | } |
a2fb29a5 DG |
716 | free(*cmd_ctx); |
717 | *cmd_ctx = NULL; | |
5461b305 DG |
718 | } |
719 | } | |
720 | ||
fac6795d | 721 | /* |
0fdd1e2c | 722 | * Notify UST applications using the shm mmap futex. |
fac6795d | 723 | */ |
0fdd1e2c | 724 | static int notify_ust_apps(int active) |
fac6795d | 725 | { |
0fdd1e2c | 726 | char *wait_shm_mmap; |
fac6795d | 727 | |
0fdd1e2c | 728 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 729 | |
0fdd1e2c | 730 | /* See shm.c for this call implying mmap, shm and futex calls */ |
e6142f2e | 731 | wait_shm_mmap = shm_ust_get_mmap(config.wait_shm_path.value, is_root); |
0fdd1e2c | 732 | if (wait_shm_mmap == NULL) { |
fac6795d DG |
733 | goto error; |
734 | } | |
735 | ||
0fdd1e2c DG |
736 | /* Wake waiting process */ |
737 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
738 | ||
739 | /* Apps notified successfully */ | |
740 | return 0; | |
fac6795d DG |
741 | |
742 | error: | |
0fdd1e2c | 743 | return -1; |
fac6795d DG |
744 | } |
745 | ||
e065084a | 746 | /* |
d063d709 DG |
747 | * Setup the outgoing data buffer for the response (llm) by allocating the |
748 | * right amount of memory and copying the original information from the lsm | |
749 | * structure. | |
ca95a216 | 750 | * |
6e10c9b9 | 751 | * Return 0 on success, negative value on error. |
ca95a216 | 752 | */ |
6e10c9b9 PP |
753 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
754 | const void *payload_buf, size_t payload_len, | |
755 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 756 | { |
6e10c9b9 PP |
757 | int ret = 0; |
758 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
759 | const size_t cmd_header_offset = header_len; | |
760 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
761 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 762 | |
6e10c9b9 | 763 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 764 | |
5461b305 | 765 | if (cmd_ctx->llm == NULL) { |
76d7553f | 766 | PERROR("zmalloc"); |
5461b305 | 767 | ret = -ENOMEM; |
6e10c9b9 | 768 | goto end; |
ca95a216 DG |
769 | } |
770 | ||
5461b305 DG |
771 | /* Copy common data */ |
772 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 773 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
774 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
775 | cmd_ctx->llm->data_size = payload_len; | |
776 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 777 | |
6e10c9b9 | 778 | /* Copy command header */ |
b4e3ceb9 PP |
779 | if (cmd_header_len) { |
780 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
781 | cmd_header_len); | |
782 | } | |
5461b305 | 783 | |
6e10c9b9 | 784 | /* Copy payload */ |
b4e3ceb9 PP |
785 | if (payload_len) { |
786 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
787 | payload_len); | |
788 | } | |
ca95a216 | 789 | |
6e10c9b9 | 790 | end: |
ca95a216 DG |
791 | return ret; |
792 | } | |
793 | ||
6e10c9b9 PP |
794 | /* |
795 | * Version of setup_lttng_msg() without command header. | |
796 | */ | |
797 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
798 | void *payload_buf, size_t payload_len) | |
799 | { | |
800 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
801 | } | |
7a485870 | 802 | /* |
5eb91c98 | 803 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 804 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 805 | */ |
5eb91c98 | 806 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 807 | { |
5eb91c98 | 808 | int ret; |
7a485870 DG |
809 | struct ltt_session *session; |
810 | struct ltt_kernel_channel *channel; | |
811 | ||
5eb91c98 | 812 | DBG("Updating kernel poll set"); |
7a485870 | 813 | |
54d01ffb | 814 | session_lock_list(); |
b5541356 | 815 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 816 | session_lock(session); |
7a485870 | 817 | if (session->kernel_session == NULL) { |
54d01ffb | 818 | session_unlock(session); |
7a485870 DG |
819 | continue; |
820 | } | |
7a485870 | 821 | |
54d01ffb DG |
822 | cds_list_for_each_entry(channel, |
823 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
824 | /* Add channel fd to the kernel poll set */ |
825 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
826 | if (ret < 0) { | |
54d01ffb | 827 | session_unlock(session); |
5eb91c98 DG |
828 | goto error; |
829 | } | |
830 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 831 | } |
54d01ffb | 832 | session_unlock(session); |
7a485870 | 833 | } |
54d01ffb | 834 | session_unlock_list(); |
7a485870 | 835 | |
5eb91c98 | 836 | return 0; |
7a485870 DG |
837 | |
838 | error: | |
54d01ffb | 839 | session_unlock_list(); |
7a485870 DG |
840 | return -1; |
841 | } | |
842 | ||
843 | /* | |
54d01ffb | 844 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 845 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 846 | * |
d063d709 | 847 | * Useful for CPU hotplug feature. |
7a485870 | 848 | */ |
2bdd86d4 | 849 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
850 | { |
851 | int ret = 0; | |
852 | struct ltt_session *session; | |
173af62f | 853 | struct ltt_kernel_session *ksess; |
7a485870 DG |
854 | struct ltt_kernel_channel *channel; |
855 | ||
856 | DBG("Updating kernel streams for channel fd %d", fd); | |
857 | ||
54d01ffb | 858 | session_lock_list(); |
b5541356 | 859 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 860 | session_lock(session); |
7a485870 | 861 | if (session->kernel_session == NULL) { |
54d01ffb | 862 | session_unlock(session); |
7a485870 DG |
863 | continue; |
864 | } | |
173af62f | 865 | ksess = session->kernel_session; |
d9800920 | 866 | |
4a15001e MD |
867 | cds_list_for_each_entry(channel, |
868 | &ksess->channel_list.head, list) { | |
869 | struct lttng_ht_iter iter; | |
870 | struct consumer_socket *socket; | |
d9800920 | 871 | |
4a15001e MD |
872 | if (channel->fd != fd) { |
873 | continue; | |
874 | } | |
875 | DBG("Channel found, updating kernel streams"); | |
876 | ret = kernel_open_channel_stream(channel); | |
877 | if (ret < 0) { | |
878 | goto error; | |
879 | } | |
880 | /* Update the stream global counter */ | |
881 | ksess->stream_count_global += ret; | |
882 | ||
883 | /* | |
884 | * Have we already sent fds to the consumer? If yes, it | |
885 | * means that tracing is started so it is safe to send | |
886 | * our updated stream fds. | |
887 | */ | |
888 | if (ksess->consumer_fds_sent != 1 | |
889 | || ksess->consumer == NULL) { | |
890 | ret = -1; | |
891 | goto error; | |
892 | } | |
893 | ||
894 | rcu_read_lock(); | |
895 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
896 | &iter.iter, socket, node.node) { | |
897 | pthread_mutex_lock(socket->lock); | |
1fc1b7c8 | 898 | ret = kernel_consumer_send_channel_streams(socket, |
4a15001e MD |
899 | channel, ksess, |
900 | session->output_traces ? 1 : 0); | |
901 | pthread_mutex_unlock(socket->lock); | |
902 | if (ret < 0) { | |
e7fe706f | 903 | rcu_read_unlock(); |
4a15001e | 904 | goto error; |
7a485870 | 905 | } |
7a485870 | 906 | } |
4a15001e | 907 | rcu_read_unlock(); |
7a485870 | 908 | } |
54d01ffb | 909 | session_unlock(session); |
7a485870 | 910 | } |
54d01ffb | 911 | session_unlock_list(); |
b3c750d2 | 912 | return ret; |
7a485870 | 913 | |
b3c750d2 | 914 | error: |
54d01ffb DG |
915 | session_unlock(session); |
916 | session_unlock_list(); | |
7a485870 DG |
917 | return ret; |
918 | } | |
919 | ||
487cf67c | 920 | /* |
ffe60014 DG |
921 | * For each tracing session, update newly registered apps. The session list |
922 | * lock MUST be acquired before calling this. | |
487cf67c DG |
923 | */ |
924 | static void update_ust_app(int app_sock) | |
925 | { | |
926 | struct ltt_session *sess, *stmp; | |
927 | ||
fdadac08 DG |
928 | /* Consumer is in an ERROR state. Stop any application update. */ |
929 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
930 | /* Stop the update process since the consumer is dead. */ | |
931 | return; | |
932 | } | |
933 | ||
487cf67c DG |
934 | /* For all tracing session(s) */ |
935 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
936 | struct ust_app *app; |
937 | ||
4ee14516 | 938 | session_lock(sess); |
a9ad0c8f MD |
939 | if (!sess->ust_session) { |
940 | goto unlock_session; | |
941 | } | |
942 | ||
943 | rcu_read_lock(); | |
944 | assert(app_sock >= 0); | |
945 | app = ust_app_find_by_sock(app_sock); | |
946 | if (app == NULL) { | |
947 | /* | |
948 | * Application can be unregistered before so | |
949 | * this is possible hence simply stopping the | |
950 | * update. | |
951 | */ | |
952 | DBG3("UST app update failed to find app sock %d", | |
953 | app_sock); | |
954 | goto unlock_rcu; | |
421cb601 | 955 | } |
a9ad0c8f MD |
956 | ust_app_global_update(sess->ust_session, app); |
957 | unlock_rcu: | |
958 | rcu_read_unlock(); | |
959 | unlock_session: | |
4ee14516 | 960 | session_unlock(sess); |
487cf67c DG |
961 | } |
962 | } | |
963 | ||
7a485870 | 964 | /* |
d063d709 | 965 | * This thread manage event coming from the kernel. |
7a485870 | 966 | * |
d063d709 DG |
967 | * Features supported in this thread: |
968 | * -) CPU Hotplug | |
7a485870 DG |
969 | */ |
970 | static void *thread_manage_kernel(void *data) | |
971 | { | |
139ac872 | 972 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 973 | uint32_t revents, nb_fd; |
7a485870 | 974 | char tmp; |
5eb91c98 | 975 | struct lttng_poll_event events; |
7a485870 | 976 | |
6993eeb3 | 977 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 978 | |
6c71277b | 979 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 980 | |
d5d63bf1 DG |
981 | /* |
982 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 983 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 984 | */ |
6d737ce4 | 985 | lttng_poll_init(&events); |
d5d63bf1 | 986 | |
e547b070 | 987 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
988 | goto error_testpoint; |
989 | } | |
8ac94142 | 990 | |
840cb59c | 991 | health_code_update(); |
44a5e5eb | 992 | |
e547b070 | 993 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 994 | goto error_testpoint; |
6993eeb3 CB |
995 | } |
996 | ||
7a485870 | 997 | while (1) { |
840cb59c | 998 | health_code_update(); |
44a5e5eb | 999 | |
7a485870 | 1000 | if (update_poll_flag == 1) { |
d21b0d71 DG |
1001 | /* Clean events object. We are about to populate it again. */ |
1002 | lttng_poll_clean(&events); | |
1003 | ||
d0b96690 | 1004 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
1005 | if (ret < 0) { |
1006 | goto error_poll_create; | |
1007 | } | |
1008 | ||
1009 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
1010 | if (ret < 0) { | |
1011 | goto error; | |
1012 | } | |
5f822d0a | 1013 | |
d21b0d71 | 1014 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
1015 | ret = update_kernel_poll(&events); |
1016 | if (ret < 0) { | |
7a485870 DG |
1017 | goto error; |
1018 | } | |
1019 | update_poll_flag = 0; | |
1020 | } | |
1021 | ||
7fa2082e | 1022 | DBG("Thread kernel polling"); |
7a485870 DG |
1023 | |
1024 | /* Poll infinite value of time */ | |
88f2b785 | 1025 | restart: |
a78af745 | 1026 | health_poll_entry(); |
5eb91c98 | 1027 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1028 | DBG("Thread kernel return from poll on %d fds", |
1029 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1030 | health_poll_exit(); |
7a485870 | 1031 | if (ret < 0) { |
88f2b785 MD |
1032 | /* |
1033 | * Restart interrupted system call. | |
1034 | */ | |
1035 | if (errno == EINTR) { | |
1036 | goto restart; | |
1037 | } | |
7a485870 DG |
1038 | goto error; |
1039 | } else if (ret == 0) { | |
1040 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1041 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1042 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1043 | continue; |
1044 | } | |
1045 | ||
0d9c5d77 DG |
1046 | nb_fd = ret; |
1047 | ||
5eb91c98 DG |
1048 | for (i = 0; i < nb_fd; i++) { |
1049 | /* Fetch once the poll data */ | |
1050 | revents = LTTNG_POLL_GETEV(&events, i); | |
1051 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1052 | |
840cb59c | 1053 | health_code_update(); |
44a5e5eb | 1054 | |
fd20dac9 MD |
1055 | if (!revents) { |
1056 | /* No activity for this FD (poll implementation). */ | |
1057 | continue; | |
1058 | } | |
1059 | ||
5eb91c98 | 1060 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1061 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1062 | if (ret) { |
139ac872 MD |
1063 | err = 0; |
1064 | goto exit; | |
5eb91c98 | 1065 | } |
7a485870 | 1066 | |
5eb91c98 | 1067 | /* Check for data on kernel pipe */ |
03e43155 MD |
1068 | if (revents & LPOLLIN) { |
1069 | if (pollfd == kernel_poll_pipe[0]) { | |
1070 | (void) lttng_read(kernel_poll_pipe[0], | |
1071 | &tmp, 1); | |
1072 | /* | |
1073 | * Ret value is useless here, if this pipe gets any actions an | |
1074 | * update is required anyway. | |
1075 | */ | |
1076 | update_poll_flag = 1; | |
1077 | continue; | |
1078 | } else { | |
1079 | /* | |
1080 | * New CPU detected by the kernel. Adding kernel stream to | |
1081 | * kernel session and updating the kernel consumer | |
1082 | */ | |
2bdd86d4 | 1083 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1084 | if (ret < 0) { |
1085 | continue; | |
1086 | } | |
1087 | break; | |
7a485870 | 1088 | } |
03e43155 MD |
1089 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1090 | update_poll_flag = 1; | |
1091 | continue; | |
1092 | } else { | |
1093 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1094 | goto error; | |
7a485870 DG |
1095 | } |
1096 | } | |
1097 | } | |
1098 | ||
139ac872 | 1099 | exit: |
7a485870 | 1100 | error: |
5eb91c98 | 1101 | lttng_poll_clean(&events); |
76d7553f | 1102 | error_poll_create: |
6993eeb3 | 1103 | error_testpoint: |
6620da75 DG |
1104 | utils_close_pipe(kernel_poll_pipe); |
1105 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1106 | if (err) { |
840cb59c | 1107 | health_error(); |
139ac872 | 1108 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1109 | WARN("Kernel thread died unexpectedly. " |
1110 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1111 | } |
8782cc74 | 1112 | health_unregister(health_sessiond); |
76d7553f | 1113 | DBG("Kernel thread dying"); |
7a485870 DG |
1114 | return NULL; |
1115 | } | |
1116 | ||
a23ec3a7 DG |
1117 | /* |
1118 | * Signal pthread condition of the consumer data that the thread. | |
1119 | */ | |
1120 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1121 | { | |
1122 | pthread_mutex_lock(&data->cond_mutex); | |
1123 | ||
1124 | /* | |
1125 | * The state is set before signaling. It can be any value, it's the waiter | |
1126 | * job to correctly interpret this condition variable associated to the | |
1127 | * consumer pthread_cond. | |
1128 | * | |
1129 | * A value of 0 means that the corresponding thread of the consumer data | |
1130 | * was not started. 1 indicates that the thread has started and is ready | |
1131 | * for action. A negative value means that there was an error during the | |
1132 | * thread bootstrap. | |
1133 | */ | |
1134 | data->consumer_thread_is_ready = state; | |
1135 | (void) pthread_cond_signal(&data->cond); | |
1136 | ||
1137 | pthread_mutex_unlock(&data->cond_mutex); | |
1138 | } | |
1139 | ||
1d4b027a | 1140 | /* |
3bd1e081 | 1141 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1142 | */ |
3bd1e081 | 1143 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1144 | { |
42fc1d0b | 1145 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1146 | uint32_t revents, nb_fd; |
1d4b027a | 1147 | enum lttcomm_return_code code; |
5eb91c98 | 1148 | struct lttng_poll_event events; |
3bd1e081 | 1149 | struct consumer_data *consumer_data = data; |
b3530820 | 1150 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 1151 | |
3bd1e081 | 1152 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1153 | |
34c1e15a MD |
1154 | rcu_register_thread(); |
1155 | rcu_thread_online(); | |
1156 | ||
6c71277b | 1157 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1158 | |
855060f8 | 1159 | health_code_update(); |
9449cc75 | 1160 | |
5eb91c98 | 1161 | /* |
331744e3 JD |
1162 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1163 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1164 | */ |
331744e3 | 1165 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1166 | if (ret < 0) { |
76d7553f | 1167 | goto error_poll; |
5eb91c98 | 1168 | } |
273ea72c | 1169 | |
edb8b045 DG |
1170 | /* |
1171 | * The error socket here is already in a listening state which was done | |
1172 | * just before spawning this thread to avoid a race between the consumer | |
1173 | * daemon exec trying to connect and the listen() call. | |
1174 | */ | |
3bd1e081 | 1175 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1176 | if (ret < 0) { |
1177 | goto error; | |
1178 | } | |
1179 | ||
840cb59c | 1180 | health_code_update(); |
44a5e5eb | 1181 | |
331744e3 | 1182 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1183 | restart: |
a78af745 | 1184 | health_poll_entry(); |
8ac94142 | 1185 | |
e547b070 | 1186 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1187 | goto error; |
1188 | } | |
8ac94142 | 1189 | |
5eb91c98 | 1190 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1191 | health_poll_exit(); |
273ea72c | 1192 | if (ret < 0) { |
88f2b785 MD |
1193 | /* |
1194 | * Restart interrupted system call. | |
1195 | */ | |
1196 | if (errno == EINTR) { | |
1197 | goto restart; | |
1198 | } | |
273ea72c DG |
1199 | goto error; |
1200 | } | |
1201 | ||
0d9c5d77 DG |
1202 | nb_fd = ret; |
1203 | ||
5eb91c98 DG |
1204 | for (i = 0; i < nb_fd; i++) { |
1205 | /* Fetch once the poll data */ | |
1206 | revents = LTTNG_POLL_GETEV(&events, i); | |
1207 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1208 | ||
840cb59c | 1209 | health_code_update(); |
44a5e5eb | 1210 | |
fd20dac9 MD |
1211 | if (!revents) { |
1212 | /* No activity for this FD (poll implementation). */ | |
1213 | continue; | |
1214 | } | |
1215 | ||
5eb91c98 | 1216 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1217 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1218 | if (ret) { |
139ac872 MD |
1219 | err = 0; |
1220 | goto exit; | |
5eb91c98 DG |
1221 | } |
1222 | ||
1223 | /* Event on the registration socket */ | |
3bd1e081 | 1224 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1225 | if (revents & LPOLLIN) { |
1226 | continue; | |
1227 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1228 | ERR("consumer err socket poll error"); |
5eb91c98 | 1229 | goto error; |
03e43155 MD |
1230 | } else { |
1231 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1232 | goto error; | |
5eb91c98 DG |
1233 | } |
1234 | } | |
273ea72c DG |
1235 | } |
1236 | ||
3bd1e081 | 1237 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1238 | if (sock < 0) { |
1239 | goto error; | |
1240 | } | |
1241 | ||
b662582b DG |
1242 | /* |
1243 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1244 | * show must go on. | |
1245 | */ | |
1246 | (void) utils_set_fd_cloexec(sock); | |
1247 | ||
840cb59c | 1248 | health_code_update(); |
44a5e5eb | 1249 | |
3bd1e081 | 1250 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1251 | |
712ea556 | 1252 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1253 | ret = lttcomm_recv_unix_sock(sock, &code, |
1254 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1255 | if (ret <= 0) { |
1256 | goto error; | |
1257 | } | |
1258 | ||
840cb59c | 1259 | health_code_update(); |
b3530820 | 1260 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 1261 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1262 | lttcomm_get_readable_code(-code)); |
1263 | goto error; | |
1264 | } | |
1265 | ||
b3530820 JG |
1266 | /* Connect both command and metadata sockets. */ |
1267 | consumer_data->cmd_sock = | |
1268 | lttcomm_connect_unix_sock( | |
1269 | consumer_data->cmd_unix_sock_path); | |
1270 | consumer_data->metadata_fd = | |
1271 | lttcomm_connect_unix_sock( | |
1272 | consumer_data->cmd_unix_sock_path); | |
1273 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
1274 | PERROR("consumer connect cmd socket"); | |
1275 | /* On error, signal condition and quit. */ | |
1276 | signal_consumer_condition(consumer_data, -1); | |
1277 | goto error; | |
1278 | } | |
1279 | ||
1280 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
1281 | ||
1282 | /* Create metadata socket lock. */ | |
1283 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1284 | if (consumer_data->metadata_sock.lock == NULL) { | |
1285 | PERROR("zmalloc pthread mutex"); | |
1286 | goto error; | |
1287 | } | |
1288 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1289 | ||
1290 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
1291 | DBG("Consumer metadata socket ready (fd: %d)", | |
1292 | consumer_data->metadata_fd); | |
1293 | ||
1294 | /* | |
1295 | * Remove the consumerd error sock since we've established a connection. | |
1296 | */ | |
3bd1e081 | 1297 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1298 | if (ret < 0) { |
72079cae DG |
1299 | goto error; |
1300 | } | |
1301 | ||
331744e3 | 1302 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1303 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1304 | if (ret < 0) { | |
72079cae | 1305 | goto error; |
5eb91c98 DG |
1306 | } |
1307 | ||
331744e3 | 1308 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1309 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1310 | LPOLLIN | LPOLLRDHUP); |
1311 | if (ret < 0) { | |
1312 | goto error; | |
1313 | } | |
1314 | ||
840cb59c | 1315 | health_code_update(); |
44a5e5eb | 1316 | |
b3530820 | 1317 | /* |
62c43103 JD |
1318 | * Transfer the write-end of the channel monitoring and rotate pipe |
1319 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE and | |
1320 | * SET_CHANNEL_ROTATE_PIPE commands. | |
b3530820 JG |
1321 | */ |
1322 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
1323 | if (!cmd_socket_wrapper) { | |
1324 | goto error; | |
1325 | } | |
3e4dc117 | 1326 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
1327 | |
1328 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
1329 | consumer_data->channel_monitor_pipe); | |
1330 | if (ret) { | |
1331 | goto error; | |
1332 | } | |
62c43103 JD |
1333 | |
1334 | ret = consumer_send_channel_rotate_pipe(cmd_socket_wrapper, | |
1335 | consumer_data->channel_rotate_pipe); | |
1336 | if (ret) { | |
1337 | goto error; | |
1338 | } | |
1339 | ||
b3530820 JG |
1340 | /* Discard the socket wrapper as it is no longer needed. */ |
1341 | consumer_destroy_socket(cmd_socket_wrapper); | |
1342 | cmd_socket_wrapper = NULL; | |
1343 | ||
1344 | /* The thread is completely initialized, signal that it is ready. */ | |
1345 | signal_consumer_condition(consumer_data, 1); | |
1346 | ||
331744e3 | 1347 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1348 | restart_poll: |
331744e3 | 1349 | while (1) { |
42fc1d0b DG |
1350 | health_code_update(); |
1351 | ||
1352 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1353 | if (should_quit) { | |
1354 | /* Not a health error. */ | |
1355 | err = 0; | |
1356 | goto exit; | |
1357 | } | |
1358 | ||
331744e3 JD |
1359 | health_poll_entry(); |
1360 | ret = lttng_poll_wait(&events, -1); | |
1361 | health_poll_exit(); | |
1362 | if (ret < 0) { | |
1363 | /* | |
1364 | * Restart interrupted system call. | |
1365 | */ | |
1366 | if (errno == EINTR) { | |
1367 | goto restart_poll; | |
1368 | } | |
1369 | goto error; | |
88f2b785 | 1370 | } |
72079cae | 1371 | |
331744e3 | 1372 | nb_fd = ret; |
0d9c5d77 | 1373 | |
331744e3 JD |
1374 | for (i = 0; i < nb_fd; i++) { |
1375 | /* Fetch once the poll data */ | |
1376 | revents = LTTNG_POLL_GETEV(&events, i); | |
1377 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1378 | |
331744e3 | 1379 | health_code_update(); |
44a5e5eb | 1380 | |
fd20dac9 MD |
1381 | if (!revents) { |
1382 | /* No activity for this FD (poll implementation). */ | |
1383 | continue; | |
1384 | } | |
1385 | ||
42fc1d0b DG |
1386 | /* |
1387 | * Thread quit pipe has been triggered, flag that we should stop | |
1388 | * but continue the current loop to handle potential data from | |
1389 | * consumer. | |
1390 | */ | |
1391 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1392 | |
331744e3 JD |
1393 | if (pollfd == sock) { |
1394 | /* Event on the consumerd socket */ | |
03e43155 MD |
1395 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1396 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1397 | ERR("consumer err socket second poll error"); |
1398 | goto error; | |
1399 | } | |
1400 | health_code_update(); | |
1401 | /* Wait for any kconsumerd error */ | |
1402 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1403 | sizeof(enum lttcomm_return_code)); | |
1404 | if (ret <= 0) { | |
1405 | ERR("consumer closed the command socket"); | |
1406 | goto error; | |
1407 | } | |
1408 | ||
1409 | ERR("consumer return code : %s", | |
1410 | lttcomm_get_readable_code(-code)); | |
1411 | ||
1412 | goto exit; | |
4ce514c4 | 1413 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1414 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1415 | && !(revents & LPOLLIN)) { | |
1416 | ERR("consumer err metadata socket second poll error"); | |
1417 | goto error; | |
1418 | } | |
331744e3 JD |
1419 | /* UST metadata requests */ |
1420 | ret = ust_consumer_metadata_request( | |
1421 | &consumer_data->metadata_sock); | |
1422 | if (ret < 0) { | |
1423 | ERR("Handling metadata request"); | |
1424 | goto error; | |
1425 | } | |
5eb91c98 | 1426 | } |
42fc1d0b | 1427 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1428 | } |
331744e3 | 1429 | health_code_update(); |
5eb91c98 DG |
1430 | } |
1431 | ||
139ac872 | 1432 | exit: |
1d4b027a | 1433 | error: |
fdadac08 DG |
1434 | /* |
1435 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1436 | * thread might be using them so get exclusive access which will abort all |
1437 | * other consumer command by other threads. | |
fdadac08 DG |
1438 | */ |
1439 | pthread_mutex_lock(&consumer_data->lock); | |
1440 | ||
5c827ce0 DG |
1441 | /* Immediately set the consumerd state to stopped */ |
1442 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1443 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1444 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1445 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1446 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1447 | } else { | |
1448 | /* Code flow error... */ | |
1449 | assert(0); | |
1450 | } | |
1451 | ||
76d7553f MD |
1452 | if (consumer_data->err_sock >= 0) { |
1453 | ret = close(consumer_data->err_sock); | |
1454 | if (ret) { | |
1455 | PERROR("close"); | |
1456 | } | |
a76cbd9f | 1457 | consumer_data->err_sock = -1; |
76d7553f MD |
1458 | } |
1459 | if (consumer_data->cmd_sock >= 0) { | |
1460 | ret = close(consumer_data->cmd_sock); | |
1461 | if (ret) { | |
1462 | PERROR("close"); | |
1463 | } | |
a76cbd9f | 1464 | consumer_data->cmd_sock = -1; |
76d7553f | 1465 | } |
96544455 SS |
1466 | if (consumer_data->metadata_sock.fd_ptr && |
1467 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1468 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1469 | if (ret) { |
1470 | PERROR("close"); | |
1471 | } | |
1472 | } | |
76d7553f MD |
1473 | if (sock >= 0) { |
1474 | ret = close(sock); | |
1475 | if (ret) { | |
1476 | PERROR("close"); | |
1477 | } | |
1478 | } | |
273ea72c | 1479 | |
3bd1e081 MD |
1480 | unlink(consumer_data->err_unix_sock_path); |
1481 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1482 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1483 | |
fdadac08 | 1484 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1485 | if (consumer_data->metadata_sock.lock) { |
1486 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1487 | free(consumer_data->metadata_sock.lock); | |
1488 | } | |
5eb91c98 | 1489 | lttng_poll_clean(&events); |
b3530820 JG |
1490 | |
1491 | if (cmd_socket_wrapper) { | |
1492 | consumer_destroy_socket(cmd_socket_wrapper); | |
1493 | } | |
76d7553f | 1494 | error_poll: |
139ac872 | 1495 | if (err) { |
840cb59c | 1496 | health_error(); |
139ac872 MD |
1497 | ERR("Health error occurred in %s", __func__); |
1498 | } | |
8782cc74 | 1499 | health_unregister(health_sessiond); |
76d7553f | 1500 | DBG("consumer thread cleanup completed"); |
0177d773 | 1501 | |
34c1e15a MD |
1502 | rcu_thread_offline(); |
1503 | rcu_unregister_thread(); | |
1504 | ||
5eb91c98 | 1505 | return NULL; |
099e26bd DG |
1506 | } |
1507 | ||
099e26bd | 1508 | /* |
81f04d5f JG |
1509 | * This thread receives application command sockets (FDs) on the |
1510 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1511 | * or an error occurs. | |
1512 | * | |
1513 | * At that point, it flushes the data (tracing and metadata) associated | |
1514 | * with this application and tears down ust app sessions and other | |
1515 | * associated data structures through ust_app_unregister(). | |
1516 | * | |
1517 | * Note that this thread never sends commands to the applications | |
1518 | * through the command sockets; it merely listens for hang-ups | |
1519 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1520 | */ |
1521 | static void *thread_manage_apps(void *data) | |
099e26bd | 1522 | { |
139ac872 | 1523 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1524 | ssize_t size_ret; |
5eb91c98 | 1525 | uint32_t revents, nb_fd; |
5eb91c98 | 1526 | struct lttng_poll_event events; |
099e26bd DG |
1527 | |
1528 | DBG("[thread] Manage application started"); | |
1529 | ||
f6a9efaa DG |
1530 | rcu_register_thread(); |
1531 | rcu_thread_online(); | |
1532 | ||
6c71277b | 1533 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1534 | |
e547b070 | 1535 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1536 | goto error_testpoint; |
1537 | } | |
1538 | ||
840cb59c | 1539 | health_code_update(); |
44a5e5eb | 1540 | |
d0b96690 | 1541 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1542 | if (ret < 0) { |
76d7553f | 1543 | goto error_poll_create; |
5eb91c98 | 1544 | } |
099e26bd | 1545 | |
5eb91c98 DG |
1546 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1547 | if (ret < 0) { | |
1548 | goto error; | |
1549 | } | |
099e26bd | 1550 | |
e547b070 | 1551 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1552 | goto error; |
1553 | } | |
8ac94142 | 1554 | |
840cb59c | 1555 | health_code_update(); |
44a5e5eb | 1556 | |
5eb91c98 | 1557 | while (1) { |
7fa2082e | 1558 | DBG("Apps thread polling"); |
099e26bd DG |
1559 | |
1560 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1561 | restart: |
a78af745 | 1562 | health_poll_entry(); |
5eb91c98 | 1563 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1564 | DBG("Apps thread return from poll on %d fds", |
1565 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1566 | health_poll_exit(); |
099e26bd | 1567 | if (ret < 0) { |
88f2b785 MD |
1568 | /* |
1569 | * Restart interrupted system call. | |
1570 | */ | |
1571 | if (errno == EINTR) { | |
1572 | goto restart; | |
1573 | } | |
099e26bd DG |
1574 | goto error; |
1575 | } | |
1576 | ||
0d9c5d77 DG |
1577 | nb_fd = ret; |
1578 | ||
5eb91c98 DG |
1579 | for (i = 0; i < nb_fd; i++) { |
1580 | /* Fetch once the poll data */ | |
1581 | revents = LTTNG_POLL_GETEV(&events, i); | |
1582 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1583 | ||
840cb59c | 1584 | health_code_update(); |
44a5e5eb | 1585 | |
fd20dac9 MD |
1586 | if (!revents) { |
1587 | /* No activity for this FD (poll implementation). */ | |
1588 | continue; | |
1589 | } | |
1590 | ||
5eb91c98 | 1591 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1592 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1593 | if (ret) { |
139ac872 MD |
1594 | err = 0; |
1595 | goto exit; | |
5eb91c98 | 1596 | } |
099e26bd | 1597 | |
5eb91c98 DG |
1598 | /* Inspect the apps cmd pipe */ |
1599 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1600 | if (revents & LPOLLIN) { |
d0b96690 DG |
1601 | int sock; |
1602 | ||
5eb91c98 | 1603 | /* Empty pipe */ |
6cd525e8 MD |
1604 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1605 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1606 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1607 | goto error; |
1608 | } | |
099e26bd | 1609 | |
840cb59c | 1610 | health_code_update(); |
44a5e5eb | 1611 | |
ffe60014 | 1612 | /* |
03e43155 MD |
1613 | * Since this is a command socket (write then read), |
1614 | * we only monitor the error events of the socket. | |
ffe60014 | 1615 | */ |
d0b96690 DG |
1616 | ret = lttng_poll_add(&events, sock, |
1617 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1618 | if (ret < 0) { | |
5eb91c98 | 1619 | goto error; |
e0c7ec2b | 1620 | } |
acc7b41b | 1621 | |
d0b96690 | 1622 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1623 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1624 | ERR("Apps command pipe error"); | |
1625 | goto error; | |
1626 | } else { | |
1627 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1628 | goto error; | |
0177d773 | 1629 | } |
5eb91c98 DG |
1630 | } else { |
1631 | /* | |
54d01ffb DG |
1632 | * At this point, we know that a registered application made |
1633 | * the event at poll_wait. | |
5eb91c98 DG |
1634 | */ |
1635 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1636 | /* Removing from the poll set */ | |
1637 | ret = lttng_poll_del(&events, pollfd); | |
1638 | if (ret < 0) { | |
1639 | goto error; | |
1640 | } | |
099e26bd | 1641 | |
b9d9b220 | 1642 | /* Socket closed on remote end. */ |
56fff090 | 1643 | ust_app_unregister(pollfd); |
03e43155 MD |
1644 | } else { |
1645 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1646 | goto error; | |
5eb91c98 | 1647 | } |
099e26bd | 1648 | } |
44a5e5eb | 1649 | |
840cb59c | 1650 | health_code_update(); |
099e26bd | 1651 | } |
099e26bd DG |
1652 | } |
1653 | ||
139ac872 | 1654 | exit: |
099e26bd | 1655 | error: |
5eb91c98 | 1656 | lttng_poll_clean(&events); |
76d7553f | 1657 | error_poll_create: |
6993eeb3 | 1658 | error_testpoint: |
6620da75 DG |
1659 | utils_close_pipe(apps_cmd_pipe); |
1660 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1661 | ||
1662 | /* | |
1663 | * We don't clean the UST app hash table here since already registered | |
1664 | * applications can still be controlled so let them be until the session | |
1665 | * daemon dies or the applications stop. | |
1666 | */ | |
1667 | ||
139ac872 | 1668 | if (err) { |
840cb59c | 1669 | health_error(); |
139ac872 MD |
1670 | ERR("Health error occurred in %s", __func__); |
1671 | } | |
8782cc74 | 1672 | health_unregister(health_sessiond); |
76d7553f | 1673 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1674 | rcu_thread_offline(); |
1675 | rcu_unregister_thread(); | |
099e26bd DG |
1676 | return NULL; |
1677 | } | |
1678 | ||
d0b96690 | 1679 | /* |
d88aee68 DG |
1680 | * Send a socket to a thread This is called from the dispatch UST registration |
1681 | * thread once all sockets are set for the application. | |
d0b96690 | 1682 | * |
b85dc84c DG |
1683 | * The sock value can be invalid, we don't really care, the thread will handle |
1684 | * it and make the necessary cleanup if so. | |
1685 | * | |
d0b96690 DG |
1686 | * On success, return 0 else a negative value being the errno message of the |
1687 | * write(). | |
1688 | */ | |
d88aee68 | 1689 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1690 | { |
6cd525e8 | 1691 | ssize_t ret; |
d0b96690 | 1692 | |
b85dc84c DG |
1693 | /* |
1694 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1695 | * before calling this function being a shutdown state of the thread. | |
1696 | */ | |
1697 | if (fd < 0) { | |
1698 | ret = -EBADF; | |
1699 | goto error; | |
1700 | } | |
d0b96690 | 1701 | |
6cd525e8 MD |
1702 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1703 | if (ret < sizeof(sock)) { | |
d88aee68 | 1704 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1705 | if (ret < 0) { |
1706 | ret = -errno; | |
1707 | } | |
1708 | goto error; | |
1709 | } | |
1710 | ||
1711 | /* All good. Don't send back the write positive ret value. */ | |
1712 | ret = 0; | |
1713 | error: | |
6cd525e8 | 1714 | return (int) ret; |
d0b96690 DG |
1715 | } |
1716 | ||
f45e313d DG |
1717 | /* |
1718 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1719 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1720 | * notify socket is never received. | |
1721 | */ | |
1722 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1723 | { | |
1724 | int ret, nb_fd = 0, i; | |
1725 | unsigned int fd_added = 0; | |
1726 | struct lttng_poll_event events; | |
1727 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1728 | ||
1729 | assert(wait_queue); | |
1730 | ||
1731 | lttng_poll_init(&events); | |
1732 | ||
1733 | /* Just skip everything for an empty queue. */ | |
1734 | if (!wait_queue->count) { | |
1735 | goto end; | |
1736 | } | |
1737 | ||
1738 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1739 | if (ret < 0) { | |
1740 | goto error_create; | |
1741 | } | |
1742 | ||
1743 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1744 | &wait_queue->head, head) { | |
1745 | assert(wait_node->app); | |
1746 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1747 | LPOLLHUP | LPOLLERR); | |
1748 | if (ret < 0) { | |
1749 | goto error; | |
1750 | } | |
1751 | ||
1752 | fd_added = 1; | |
1753 | } | |
1754 | ||
1755 | if (!fd_added) { | |
1756 | goto end; | |
1757 | } | |
1758 | ||
1759 | /* | |
1760 | * Poll but don't block so we can quickly identify the faulty events and | |
1761 | * clean them afterwards from the wait queue. | |
1762 | */ | |
1763 | ret = lttng_poll_wait(&events, 0); | |
1764 | if (ret < 0) { | |
1765 | goto error; | |
1766 | } | |
1767 | nb_fd = ret; | |
1768 | ||
1769 | for (i = 0; i < nb_fd; i++) { | |
1770 | /* Get faulty FD. */ | |
1771 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1772 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1773 | ||
fd20dac9 MD |
1774 | if (!revents) { |
1775 | /* No activity for this FD (poll implementation). */ | |
1776 | continue; | |
1777 | } | |
1778 | ||
f45e313d DG |
1779 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1780 | &wait_queue->head, head) { | |
1781 | if (pollfd == wait_node->app->sock && | |
1782 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1783 | cds_list_del(&wait_node->head); | |
1784 | wait_queue->count--; | |
1785 | ust_app_destroy(wait_node->app); | |
1786 | free(wait_node); | |
48b40bcf JG |
1787 | /* |
1788 | * Silence warning of use-after-free in | |
1789 | * cds_list_for_each_entry_safe which uses | |
1790 | * __typeof__(*wait_node). | |
1791 | */ | |
1792 | wait_node = NULL; | |
f45e313d | 1793 | break; |
03e43155 MD |
1794 | } else { |
1795 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1796 | goto error; | |
f45e313d DG |
1797 | } |
1798 | } | |
1799 | } | |
1800 | ||
1801 | if (nb_fd > 0) { | |
1802 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1803 | } | |
1804 | ||
1805 | end: | |
1806 | lttng_poll_clean(&events); | |
1807 | return; | |
1808 | ||
1809 | error: | |
1810 | lttng_poll_clean(&events); | |
1811 | error_create: | |
1812 | ERR("Unable to sanitize wait queue"); | |
1813 | return; | |
1814 | } | |
1815 | ||
099e26bd DG |
1816 | /* |
1817 | * Dispatch request from the registration threads to the application | |
1818 | * communication thread. | |
1819 | */ | |
1820 | static void *thread_dispatch_ust_registration(void *data) | |
1821 | { | |
12e2b881 | 1822 | int ret, err = -1; |
8bdee6e2 | 1823 | struct cds_wfcq_node *node; |
099e26bd | 1824 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1825 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1826 | struct ust_reg_wait_queue wait_queue = { | |
1827 | .count = 0, | |
1828 | }; | |
d0b96690 | 1829 | |
967e3668 MD |
1830 | rcu_register_thread(); |
1831 | ||
6c71277b | 1832 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1833 | |
9ad42ec1 MD |
1834 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1835 | goto error_testpoint; | |
1836 | } | |
1837 | ||
12e2b881 MD |
1838 | health_code_update(); |
1839 | ||
f45e313d | 1840 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1841 | |
1842 | DBG("[thread] Dispatch UST command started"); | |
1843 | ||
0ed3b1a8 | 1844 | for (;;) { |
12e2b881 MD |
1845 | health_code_update(); |
1846 | ||
099e26bd DG |
1847 | /* Atomically prepare the queue futex */ |
1848 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1849 | ||
0ed3b1a8 MD |
1850 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1851 | break; | |
1852 | } | |
1853 | ||
099e26bd | 1854 | do { |
d0b96690 | 1855 | struct ust_app *app = NULL; |
7972aab2 | 1856 | ust_cmd = NULL; |
d0b96690 | 1857 | |
f45e313d DG |
1858 | /* |
1859 | * Make sure we don't have node(s) that have hung up before receiving | |
1860 | * the notify socket. This is to clean the list in order to avoid | |
1861 | * memory leaks from notify socket that are never seen. | |
1862 | */ | |
1863 | sanitize_wait_queue(&wait_queue); | |
1864 | ||
12e2b881 | 1865 | health_code_update(); |
099e26bd | 1866 | /* Dequeue command for registration */ |
8bdee6e2 | 1867 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1868 | if (node == NULL) { |
00a17c97 | 1869 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1870 | /* Continue thread execution */ |
1871 | break; | |
1872 | } | |
1873 | ||
1874 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1875 | ||
2f50c8a3 DG |
1876 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1877 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1878 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1879 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1880 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1881 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1882 | |
1883 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1884 | wait_node = zmalloc(sizeof(*wait_node)); | |
1885 | if (!wait_node) { | |
1886 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1887 | ret = close(ust_cmd->sock); |
1888 | if (ret < 0) { | |
1889 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1890 | } | |
51dec90d | 1891 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1892 | free(ust_cmd); |
d0b96690 DG |
1893 | goto error; |
1894 | } | |
1895 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1896 | ||
1897 | /* Create application object if socket is CMD. */ | |
1898 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1899 | ust_cmd->sock); | |
1900 | if (!wait_node->app) { | |
1901 | ret = close(ust_cmd->sock); | |
1902 | if (ret < 0) { | |
1903 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1904 | } |
51dec90d | 1905 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1906 | free(wait_node); |
7972aab2 | 1907 | free(ust_cmd); |
d0b96690 DG |
1908 | continue; |
1909 | } | |
1910 | /* | |
1911 | * Add application to the wait queue so we can set the notify | |
1912 | * socket before putting this object in the global ht. | |
1913 | */ | |
f45e313d DG |
1914 | cds_list_add(&wait_node->head, &wait_queue.head); |
1915 | wait_queue.count++; | |
d0b96690 | 1916 | |
7972aab2 | 1917 | free(ust_cmd); |
d0b96690 DG |
1918 | /* |
1919 | * We have to continue here since we don't have the notify | |
1920 | * socket and the application MUST be added to the hash table | |
1921 | * only at that moment. | |
1922 | */ | |
1923 | continue; | |
1924 | } else { | |
1925 | /* | |
1926 | * Look for the application in the local wait queue and set the | |
1927 | * notify socket if found. | |
1928 | */ | |
d88aee68 | 1929 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1930 | &wait_queue.head, head) { |
12e2b881 | 1931 | health_code_update(); |
d0b96690 DG |
1932 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1933 | wait_node->app->notify_sock = ust_cmd->sock; | |
1934 | cds_list_del(&wait_node->head); | |
f45e313d | 1935 | wait_queue.count--; |
d0b96690 DG |
1936 | app = wait_node->app; |
1937 | free(wait_node); | |
1938 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1939 | break; | |
1940 | } | |
1941 | } | |
020d7f60 DG |
1942 | |
1943 | /* | |
1944 | * With no application at this stage the received socket is | |
1945 | * basically useless so close it before we free the cmd data | |
1946 | * structure for good. | |
1947 | */ | |
1948 | if (!app) { | |
1949 | ret = close(ust_cmd->sock); | |
1950 | if (ret < 0) { | |
1951 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1952 | } | |
51dec90d | 1953 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1954 | } |
7972aab2 | 1955 | free(ust_cmd); |
d0b96690 DG |
1956 | } |
1957 | ||
1958 | if (app) { | |
d0b96690 DG |
1959 | /* |
1960 | * @session_lock_list | |
1961 | * | |
1962 | * Lock the global session list so from the register up to the | |
1963 | * registration done message, no thread can see the application | |
1964 | * and change its state. | |
1965 | */ | |
1966 | session_lock_list(); | |
1967 | rcu_read_lock(); | |
d88aee68 | 1968 | |
d0b96690 DG |
1969 | /* |
1970 | * Add application to the global hash table. This needs to be | |
1971 | * done before the update to the UST registry can locate the | |
1972 | * application. | |
1973 | */ | |
1974 | ust_app_add(app); | |
d88aee68 DG |
1975 | |
1976 | /* Set app version. This call will print an error if needed. */ | |
1977 | (void) ust_app_version(app); | |
1978 | ||
1979 | /* Send notify socket through the notify pipe. */ | |
1980 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1981 | app->notify_sock); | |
1982 | if (ret < 0) { | |
1983 | rcu_read_unlock(); | |
1984 | session_unlock_list(); | |
b85dc84c DG |
1985 | /* |
1986 | * No notify thread, stop the UST tracing. However, this is | |
1987 | * not an internal error of the this thread thus setting | |
1988 | * the health error code to a normal exit. | |
1989 | */ | |
1990 | err = 0; | |
d88aee68 | 1991 | goto error; |
6620da75 | 1992 | } |
d88aee68 | 1993 | |
d0b96690 DG |
1994 | /* |
1995 | * Update newly registered application with the tracing | |
1996 | * registry info already enabled information. | |
1997 | */ | |
1998 | update_ust_app(app->sock); | |
d88aee68 DG |
1999 | |
2000 | /* | |
2001 | * Don't care about return value. Let the manage apps threads | |
2002 | * handle app unregistration upon socket close. | |
2003 | */ | |
fb45065e | 2004 | (void) ust_app_register_done(app); |
d88aee68 DG |
2005 | |
2006 | /* | |
2007 | * Even if the application socket has been closed, send the app | |
2008 | * to the thread and unregistration will take place at that | |
2009 | * place. | |
2010 | */ | |
2011 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 2012 | if (ret < 0) { |
d88aee68 DG |
2013 | rcu_read_unlock(); |
2014 | session_unlock_list(); | |
b85dc84c DG |
2015 | /* |
2016 | * No apps. thread, stop the UST tracing. However, this is | |
2017 | * not an internal error of the this thread thus setting | |
2018 | * the health error code to a normal exit. | |
2019 | */ | |
2020 | err = 0; | |
d88aee68 | 2021 | goto error; |
d0b96690 | 2022 | } |
d88aee68 | 2023 | |
d0b96690 DG |
2024 | rcu_read_unlock(); |
2025 | session_unlock_list(); | |
099e26bd | 2026 | } |
099e26bd DG |
2027 | } while (node != NULL); |
2028 | ||
12e2b881 | 2029 | health_poll_entry(); |
099e26bd DG |
2030 | /* Futex wait on queue. Blocking call on futex() */ |
2031 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2032 | health_poll_exit(); |
099e26bd | 2033 | } |
12e2b881 MD |
2034 | /* Normal exit, no error */ |
2035 | err = 0; | |
099e26bd DG |
2036 | |
2037 | error: | |
d88aee68 DG |
2038 | /* Clean up wait queue. */ |
2039 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2040 | &wait_queue.head, head) { |
d88aee68 | 2041 | cds_list_del(&wait_node->head); |
f45e313d | 2042 | wait_queue.count--; |
d88aee68 DG |
2043 | free(wait_node); |
2044 | } | |
2045 | ||
772b8f4d MD |
2046 | /* Empty command queue. */ |
2047 | for (;;) { | |
2048 | /* Dequeue command for registration */ | |
2049 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2050 | if (node == NULL) { | |
2051 | break; | |
2052 | } | |
2053 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2054 | ret = close(ust_cmd->sock); | |
2055 | if (ret < 0) { | |
2056 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2057 | } | |
2058 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2059 | free(ust_cmd); | |
2060 | } | |
2061 | ||
9ad42ec1 | 2062 | error_testpoint: |
099e26bd | 2063 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2064 | if (err) { |
2065 | health_error(); | |
2066 | ERR("Health error occurred in %s", __func__); | |
2067 | } | |
8782cc74 | 2068 | health_unregister(health_sessiond); |
967e3668 | 2069 | rcu_unregister_thread(); |
099e26bd DG |
2070 | return NULL; |
2071 | } | |
2072 | ||
2073 | /* | |
2074 | * This thread manage application registration. | |
2075 | */ | |
2076 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2077 | { |
139ac872 | 2078 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2079 | uint32_t revents, nb_fd; |
2080 | struct lttng_poll_event events; | |
099e26bd DG |
2081 | /* |
2082 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2083 | * freed in the manage apps thread. | |
2084 | */ | |
2085 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2086 | |
099e26bd | 2087 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2088 | |
6c71277b | 2089 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2090 | |
e547b070 | 2091 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2092 | goto error_testpoint; |
2093 | } | |
8ac94142 | 2094 | |
1d4b027a DG |
2095 | ret = lttcomm_listen_unix_sock(apps_sock); |
2096 | if (ret < 0) { | |
76d7553f | 2097 | goto error_listen; |
1d4b027a DG |
2098 | } |
2099 | ||
5eb91c98 DG |
2100 | /* |
2101 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2102 | * more will be added to this poll set. | |
2103 | */ | |
d0b96690 | 2104 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2105 | if (ret < 0) { |
76d7553f | 2106 | goto error_create_poll; |
5eb91c98 | 2107 | } |
273ea72c | 2108 | |
5eb91c98 DG |
2109 | /* Add the application registration socket */ |
2110 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2111 | if (ret < 0) { | |
76d7553f | 2112 | goto error_poll_add; |
5eb91c98 | 2113 | } |
273ea72c | 2114 | |
1d4b027a | 2115 | /* Notify all applications to register */ |
0fdd1e2c DG |
2116 | ret = notify_ust_apps(1); |
2117 | if (ret < 0) { | |
2118 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2119 | "Execution continues but there might be problem for already\n" |
2120 | "running applications that wishes to register."); | |
0fdd1e2c | 2121 | } |
1d4b027a DG |
2122 | |
2123 | while (1) { | |
2124 | DBG("Accepting application registration"); | |
273ea72c DG |
2125 | |
2126 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2127 | restart: |
a78af745 | 2128 | health_poll_entry(); |
5eb91c98 | 2129 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2130 | health_poll_exit(); |
273ea72c | 2131 | if (ret < 0) { |
88f2b785 MD |
2132 | /* |
2133 | * Restart interrupted system call. | |
2134 | */ | |
2135 | if (errno == EINTR) { | |
2136 | goto restart; | |
2137 | } | |
273ea72c DG |
2138 | goto error; |
2139 | } | |
2140 | ||
0d9c5d77 DG |
2141 | nb_fd = ret; |
2142 | ||
5eb91c98 | 2143 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2144 | health_code_update(); |
139ac872 | 2145 | |
5eb91c98 DG |
2146 | /* Fetch once the poll data */ |
2147 | revents = LTTNG_POLL_GETEV(&events, i); | |
2148 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2149 | |
fd20dac9 MD |
2150 | if (!revents) { |
2151 | /* No activity for this FD (poll implementation). */ | |
2152 | continue; | |
2153 | } | |
2154 | ||
5eb91c98 | 2155 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2156 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2157 | if (ret) { |
139ac872 MD |
2158 | err = 0; |
2159 | goto exit; | |
90014c57 | 2160 | } |
1d4b027a | 2161 | |
5eb91c98 DG |
2162 | /* Event on the registration socket */ |
2163 | if (pollfd == apps_sock) { | |
03e43155 | 2164 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2165 | sock = lttcomm_accept_unix_sock(apps_sock); |
2166 | if (sock < 0) { | |
2167 | goto error; | |
2168 | } | |
099e26bd | 2169 | |
16c5c8fa DG |
2170 | /* |
2171 | * Set socket timeout for both receiving and ending. | |
2172 | * app_socket_timeout is in seconds, whereas | |
2173 | * lttcomm_setsockopt_rcv_timeout and | |
2174 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2175 | * parameter. | |
2176 | */ | |
e6142f2e | 2177 | if (config.app_socket_timeout >= 0) { |
28ce0ff2 | 2178 | (void) lttcomm_setsockopt_rcv_timeout(sock, |
e6142f2e | 2179 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2180 | (void) lttcomm_setsockopt_snd_timeout(sock, |
e6142f2e | 2181 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2182 | } |
16c5c8fa | 2183 | |
b662582b DG |
2184 | /* |
2185 | * Set the CLOEXEC flag. Return code is useless because | |
2186 | * either way, the show must go on. | |
2187 | */ | |
2188 | (void) utils_set_fd_cloexec(sock); | |
2189 | ||
5eb91c98 | 2190 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2191 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2192 | if (ust_cmd == NULL) { |
76d7553f | 2193 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2194 | ret = close(sock); |
2195 | if (ret) { | |
2196 | PERROR("close"); | |
2197 | } | |
5eb91c98 DG |
2198 | goto error; |
2199 | } | |
1d4b027a | 2200 | |
5eb91c98 DG |
2201 | /* |
2202 | * Using message-based transmissions to ensure we don't | |
2203 | * have to deal with partially received messages. | |
2204 | */ | |
4063050c MD |
2205 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2206 | if (ret < 0) { | |
2207 | ERR("Exhausted file descriptors allowed for applications."); | |
2208 | free(ust_cmd); | |
2209 | ret = close(sock); | |
2210 | if (ret) { | |
2211 | PERROR("close"); | |
2212 | } | |
2213 | sock = -1; | |
2214 | continue; | |
2215 | } | |
d88aee68 | 2216 | |
840cb59c | 2217 | health_code_update(); |
d0b96690 DG |
2218 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2219 | if (ret < 0) { | |
5eb91c98 | 2220 | free(ust_cmd); |
d0b96690 | 2221 | /* Close socket of the application. */ |
76d7553f MD |
2222 | ret = close(sock); |
2223 | if (ret) { | |
2224 | PERROR("close"); | |
2225 | } | |
4063050c | 2226 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2227 | sock = -1; |
5eb91c98 DG |
2228 | continue; |
2229 | } | |
840cb59c | 2230 | health_code_update(); |
099e26bd | 2231 | |
5eb91c98 | 2232 | ust_cmd->sock = sock; |
34a2494f | 2233 | sock = -1; |
099e26bd | 2234 | |
5eb91c98 DG |
2235 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2236 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2237 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2238 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2239 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2240 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2241 | |
5eb91c98 DG |
2242 | /* |
2243 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2244 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2245 | */ |
8bdee6e2 | 2246 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2247 | |
2248 | /* | |
2249 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2250 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2251 | */ |
2252 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2253 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2254 | ERR("Register apps socket poll error"); | |
2255 | goto error; | |
2256 | } else { | |
2257 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2258 | goto error; | |
5eb91c98 DG |
2259 | } |
2260 | } | |
90014c57 | 2261 | } |
1d4b027a DG |
2262 | } |
2263 | ||
139ac872 | 2264 | exit: |
1d4b027a | 2265 | error: |
0fdd1e2c DG |
2266 | /* Notify that the registration thread is gone */ |
2267 | notify_ust_apps(0); | |
2268 | ||
a4b35e07 | 2269 | if (apps_sock >= 0) { |
76d7553f MD |
2270 | ret = close(apps_sock); |
2271 | if (ret) { | |
2272 | PERROR("close"); | |
2273 | } | |
a4b35e07 | 2274 | } |
46c3f085 | 2275 | if (sock >= 0) { |
76d7553f MD |
2276 | ret = close(sock); |
2277 | if (ret) { | |
2278 | PERROR("close"); | |
2279 | } | |
4063050c | 2280 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2281 | } |
e6142f2e | 2282 | unlink(config.apps_unix_sock_path.value); |
0fdd1e2c | 2283 | |
76d7553f | 2284 | error_poll_add: |
5eb91c98 | 2285 | lttng_poll_clean(&events); |
76d7553f MD |
2286 | error_listen: |
2287 | error_create_poll: | |
6993eeb3 | 2288 | error_testpoint: |
76d7553f | 2289 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2290 | if (err) { |
2291 | health_error(); | |
2292 | ERR("Health error occurred in %s", __func__); | |
2293 | } | |
8782cc74 | 2294 | health_unregister(health_sessiond); |
5eb91c98 | 2295 | |
1d4b027a DG |
2296 | return NULL; |
2297 | } | |
2298 | ||
8c0faa1d | 2299 | /* |
3bd1e081 | 2300 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2301 | * exec or it will fails. |
8c0faa1d | 2302 | */ |
3bd1e081 | 2303 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2304 | { |
a23ec3a7 | 2305 | int ret, clock_ret; |
ee0b0061 DG |
2306 | struct timespec timeout; |
2307 | ||
13a7bce3 JG |
2308 | /* |
2309 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2310 | * This access to consumer_thread_is_ready does not need to be | |
2311 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2312 | * management thread has not been started at this point. | |
2313 | */ | |
a23ec3a7 | 2314 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2315 | |
a23ec3a7 DG |
2316 | /* Setup pthread condition */ |
2317 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2318 | if (ret) { |
a23ec3a7 DG |
2319 | errno = ret; |
2320 | PERROR("pthread_condattr_init consumer data"); | |
2321 | goto error; | |
2322 | } | |
2323 | ||
2324 | /* | |
2325 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2326 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2327 | * for a more details and how we noticed it. | |
2328 | */ | |
2329 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2330 | if (ret) { |
a23ec3a7 DG |
2331 | errno = ret; |
2332 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2333 | goto error; |
2334 | } | |
8c0faa1d | 2335 | |
a23ec3a7 | 2336 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2337 | if (ret) { |
a23ec3a7 DG |
2338 | errno = ret; |
2339 | PERROR("pthread_cond_init consumer data"); | |
2340 | goto error; | |
2341 | } | |
2342 | ||
1a1a34b4 MJ |
2343 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2344 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2345 | if (ret) { |
2346 | errno = ret; | |
3bd1e081 | 2347 | PERROR("pthread_create consumer"); |
ee0b0061 | 2348 | ret = -1; |
8c0faa1d DG |
2349 | goto error; |
2350 | } | |
2351 | ||
a23ec3a7 DG |
2352 | /* We are about to wait on a pthread condition */ |
2353 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2354 | ||
ee0b0061 | 2355 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2356 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2357 | /* |
2358 | * Set the timeout for the condition timed wait even if the clock gettime | |
2359 | * call fails since we might loop on that call and we want to avoid to | |
2360 | * increment the timeout too many times. | |
2361 | */ | |
2362 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2363 | ||
2364 | /* | |
2365 | * The following loop COULD be skipped in some conditions so this is why we | |
2366 | * set ret to 0 in order to make sure at least one round of the loop is | |
2367 | * done. | |
2368 | */ | |
2369 | ret = 0; | |
2370 | ||
2371 | /* | |
2372 | * Loop until the condition is reached or when a timeout is reached. Note | |
2373 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2374 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2375 | * possible. This loop does not take any chances and works with both of | |
2376 | * them. | |
2377 | */ | |
2378 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2379 | if (clock_ret < 0) { | |
2380 | PERROR("clock_gettime spawn consumer"); | |
2381 | /* Infinite wait for the consumerd thread to be ready */ | |
2382 | ret = pthread_cond_wait(&consumer_data->cond, | |
2383 | &consumer_data->cond_mutex); | |
2384 | } else { | |
2385 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2386 | &consumer_data->cond_mutex, &timeout); | |
2387 | } | |
ee0b0061 | 2388 | } |
8c0faa1d | 2389 | |
a23ec3a7 DG |
2390 | /* Release the pthread condition */ |
2391 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2392 | ||
2393 | if (ret != 0) { | |
2394 | errno = ret; | |
2395 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2396 | int pth_ret; |
2397 | ||
ee0b0061 DG |
2398 | /* |
2399 | * Call has timed out so we kill the kconsumerd_thread and return | |
2400 | * an error. | |
2401 | */ | |
a23ec3a7 DG |
2402 | ERR("Condition timed out. The consumer thread was never ready." |
2403 | " Killing it"); | |
4282f9a3 DG |
2404 | pth_ret = pthread_cancel(consumer_data->thread); |
2405 | if (pth_ret < 0) { | |
3bd1e081 | 2406 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2407 | } |
2408 | } else { | |
a23ec3a7 | 2409 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2410 | } |
4282f9a3 DG |
2411 | /* Caller is expecting a negative value on failure. */ |
2412 | ret = -1; | |
ee0b0061 DG |
2413 | goto error; |
2414 | } | |
2415 | ||
3bd1e081 MD |
2416 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2417 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2418 | ERR("Consumerd did not start"); |
3bd1e081 | 2419 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2420 | goto error; |
2421 | } | |
3bd1e081 | 2422 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2423 | |
8c0faa1d DG |
2424 | return 0; |
2425 | ||
2426 | error: | |
2427 | return ret; | |
2428 | } | |
2429 | ||
d9800920 | 2430 | /* |
3bd1e081 | 2431 | * Join consumer thread |
d9800920 | 2432 | */ |
3bd1e081 | 2433 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2434 | { |
2435 | void *status; | |
cf3af59e | 2436 | |
e8209f6b DG |
2437 | /* Consumer pid must be a real one. */ |
2438 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2439 | int ret; |
3bd1e081 | 2440 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2441 | if (ret) { |
4a15001e | 2442 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2443 | return ret; |
2444 | } | |
3bd1e081 | 2445 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2446 | } else { |
2447 | return 0; | |
2448 | } | |
2449 | } | |
2450 | ||
8c0faa1d | 2451 | /* |
3bd1e081 | 2452 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2453 | * |
d063d709 | 2454 | * Return pid if successful else -1. |
8c0faa1d | 2455 | */ |
3bd1e081 | 2456 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2457 | { |
2458 | int ret; | |
2459 | pid_t pid; | |
94c55f17 | 2460 | const char *consumer_to_use; |
53086306 | 2461 | const char *verbosity; |
94c55f17 | 2462 | struct stat st; |
8c0faa1d | 2463 | |
3bd1e081 | 2464 | DBG("Spawning consumerd"); |
c49dc785 | 2465 | |
8c0faa1d DG |
2466 | pid = fork(); |
2467 | if (pid == 0) { | |
2468 | /* | |
3bd1e081 | 2469 | * Exec consumerd. |
8c0faa1d | 2470 | */ |
e6142f2e | 2471 | if (config.verbose_consumer) { |
53086306 | 2472 | verbosity = "--verbose"; |
4421f712 | 2473 | } else if (lttng_opt_quiet) { |
53086306 | 2474 | verbosity = "--quiet"; |
4421f712 DG |
2475 | } else { |
2476 | verbosity = ""; | |
53086306 | 2477 | } |
4421f712 | 2478 | |
3bd1e081 MD |
2479 | switch (consumer_data->type) { |
2480 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2481 | /* |
c7704d57 DG |
2482 | * Find out which consumerd to execute. We will first try the |
2483 | * 64-bit path, then the sessiond's installation directory, and | |
2484 | * fallback on the 32-bit one, | |
94c55f17 | 2485 | */ |
63a799e8 | 2486 | DBG3("Looking for a kernel consumer at these locations:"); |
59ee5091 | 2487 | DBG3(" 1) %s", config.consumerd64_bin_path.value ? : "NULL"); |
e6142f2e | 2488 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); |
59ee5091 | 2489 | DBG3(" 3) %s", config.consumerd32_bin_path.value ? : "NULL"); |
e6142f2e | 2490 | if (stat(config.consumerd64_bin_path.value, &st) == 0) { |
63a799e8 | 2491 | DBG3("Found location #1"); |
e6142f2e JG |
2492 | consumer_to_use = config.consumerd64_bin_path.value; |
2493 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { | |
63a799e8 | 2494 | DBG3("Found location #2"); |
e6142f2e JG |
2495 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; |
2496 | } else if (stat(config.consumerd32_bin_path.value, &st) == 0) { | |
63a799e8 | 2497 | DBG3("Found location #3"); |
e6142f2e | 2498 | consumer_to_use = config.consumerd32_bin_path.value; |
94c55f17 | 2499 | } else { |
63a799e8 | 2500 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2501 | ret = -EINVAL; |
3d678709 | 2502 | goto error; |
94c55f17 AM |
2503 | } |
2504 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
6e2cc8d8 | 2505 | (void) execl(consumer_to_use, |
94c55f17 AM |
2506 | "lttng-consumerd", verbosity, "-k", |
2507 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2508 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2509 | "--group", config.tracing_group_name.value, |
94c55f17 | 2510 | NULL); |
3bd1e081 | 2511 | break; |
7753dea8 MD |
2512 | case LTTNG_CONSUMER64_UST: |
2513 | { | |
46b23495 | 2514 | if (config.consumerd64_lib_dir.value) { |
8f4905da MD |
2515 | char *tmp; |
2516 | size_t tmplen; | |
ddaec4a2 | 2517 | char *tmpnew; |
8f4905da | 2518 | |
e8fa9fb0 | 2519 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2520 | if (!tmp) { |
2521 | tmp = ""; | |
2522 | } | |
d222983e | 2523 | tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2524 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2525 | if (!tmpnew) { | |
2526 | ret = -ENOMEM; | |
2527 | goto error; | |
2528 | } | |
e6142f2e | 2529 | strcat(tmpnew, config.consumerd64_lib_dir.value); |
8f4905da MD |
2530 | if (tmp[0] != '\0') { |
2531 | strcat(tmpnew, ":"); | |
2532 | strcat(tmpnew, tmp); | |
2533 | } | |
d222983e | 2534 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2535 | free(tmpnew); |
8f4905da MD |
2536 | if (ret) { |
2537 | ret = -errno; | |
2538 | goto error; | |
2539 | } | |
2540 | } | |
e6142f2e JG |
2541 | DBG("Using 64-bit UST consumer at: %s", config.consumerd64_bin_path.value); |
2542 | (void) execl(config.consumerd64_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2543 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2544 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2545 | "--group", config.tracing_group_name.value, |
7753dea8 | 2546 | NULL); |
3bd1e081 | 2547 | break; |
7753dea8 MD |
2548 | } |
2549 | case LTTNG_CONSUMER32_UST: | |
2550 | { | |
46b23495 | 2551 | if (config.consumerd32_lib_dir.value) { |
8f4905da MD |
2552 | char *tmp; |
2553 | size_t tmplen; | |
ddaec4a2 | 2554 | char *tmpnew; |
8f4905da | 2555 | |
e8fa9fb0 | 2556 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2557 | if (!tmp) { |
2558 | tmp = ""; | |
2559 | } | |
d222983e | 2560 | tmplen = strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2561 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2562 | if (!tmpnew) { | |
2563 | ret = -ENOMEM; | |
2564 | goto error; | |
2565 | } | |
e6142f2e | 2566 | strcat(tmpnew, config.consumerd32_lib_dir.value); |
8f4905da MD |
2567 | if (tmp[0] != '\0') { |
2568 | strcat(tmpnew, ":"); | |
2569 | strcat(tmpnew, tmp); | |
2570 | } | |
d222983e | 2571 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2572 | free(tmpnew); |
8f4905da MD |
2573 | if (ret) { |
2574 | ret = -errno; | |
2575 | goto error; | |
2576 | } | |
2577 | } | |
e6142f2e JG |
2578 | DBG("Using 32-bit UST consumer at: %s", config.consumerd32_bin_path.value); |
2579 | (void) execl(config.consumerd32_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2580 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2581 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2582 | "--group", config.tracing_group_name.value, |
7753dea8 MD |
2583 | NULL); |
2584 | break; | |
2585 | } | |
3bd1e081 | 2586 | default: |
b60e7183 | 2587 | ERR("unknown consumer type"); |
e9d6b496 | 2588 | errno = 0; |
3bd1e081 | 2589 | } |
8c0faa1d | 2590 | if (errno != 0) { |
4282f9a3 | 2591 | PERROR("Consumer execl()"); |
8c0faa1d | 2592 | } |
4282f9a3 | 2593 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2594 | exit(EXIT_FAILURE); |
2595 | } else if (pid > 0) { | |
2596 | ret = pid; | |
8c0faa1d | 2597 | } else { |
76d7553f | 2598 | PERROR("start consumer fork"); |
8c0faa1d | 2599 | ret = -errno; |
8c0faa1d | 2600 | } |
8f4905da | 2601 | error: |
8c0faa1d DG |
2602 | return ret; |
2603 | } | |
2604 | ||
693bd40b | 2605 | /* |
3bd1e081 | 2606 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2607 | */ |
3bd1e081 | 2608 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2609 | { |
c617c0c6 | 2610 | int ret; |
edb8b045 DG |
2611 | |
2612 | /* | |
2613 | * Set the listen() state on the socket since there is a possible race | |
2614 | * between the exec() of the consumer daemon and this call if place in the | |
2615 | * consumer thread. See bug #366 for more details. | |
2616 | */ | |
2617 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2618 | if (ret < 0) { | |
2619 | goto error; | |
2620 | } | |
693bd40b | 2621 | |
3bd1e081 MD |
2622 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2623 | if (consumer_data->pid != 0) { | |
2624 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2625 | goto end; |
2626 | } | |
693bd40b | 2627 | |
3bd1e081 | 2628 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2629 | if (ret < 0) { |
3bd1e081 MD |
2630 | ERR("Spawning consumerd failed"); |
2631 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2632 | goto error; |
693bd40b | 2633 | } |
c49dc785 | 2634 | |
3bd1e081 MD |
2635 | /* Setting up the consumer_data pid */ |
2636 | consumer_data->pid = ret; | |
48842b30 | 2637 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2638 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2639 | |
3bd1e081 MD |
2640 | DBG2("Spawning consumer control thread"); |
2641 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2642 | if (ret < 0) { |
3bd1e081 | 2643 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2644 | goto error; |
2645 | } | |
2646 | ||
c49dc785 | 2647 | end: |
693bd40b DG |
2648 | return 0; |
2649 | ||
2650 | error: | |
331744e3 | 2651 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2652 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2653 | int err; |
2654 | ||
edb8b045 DG |
2655 | err = close(consumer_data->err_sock); |
2656 | if (err < 0) { | |
2657 | PERROR("close consumer data error socket"); | |
2658 | } | |
2659 | } | |
693bd40b DG |
2660 | return ret; |
2661 | } | |
2662 | ||
b73401da | 2663 | /* |
096102bd | 2664 | * Setup necessary data for kernel tracer action. |
b73401da | 2665 | */ |
096102bd | 2666 | static int init_kernel_tracer(void) |
b73401da DG |
2667 | { |
2668 | int ret; | |
b73401da | 2669 | |
096102bd DG |
2670 | /* Modprobe lttng kernel modules */ |
2671 | ret = modprobe_lttng_control(); | |
b73401da | 2672 | if (ret < 0) { |
b73401da DG |
2673 | goto error; |
2674 | } | |
2675 | ||
096102bd DG |
2676 | /* Open debugfs lttng */ |
2677 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2678 | if (kernel_tracer_fd < 0) { | |
2679 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2680 | goto error_open; |
54d01ffb DG |
2681 | } |
2682 | ||
2f77fc4b | 2683 | /* Validate kernel version */ |
88076e89 JD |
2684 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
2685 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
2686 | if (ret < 0) { |
2687 | goto error_version; | |
b551a063 | 2688 | } |
54d01ffb | 2689 | |
2f77fc4b DG |
2690 | ret = modprobe_lttng_data(); |
2691 | if (ret < 0) { | |
2692 | goto error_modules; | |
54d01ffb DG |
2693 | } |
2694 | ||
6e21424e JR |
2695 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
2696 | kernel_tracer_fd); | |
2697 | if (ret < 0) { | |
2698 | goto error_modules; | |
2699 | } | |
2700 | ||
2701 | if (ret < 1) { | |
2702 | WARN("Kernel tracer does not support buffer monitoring. " | |
2703 | "The monitoring timer of channels in the kernel domain " | |
2704 | "will be set to 0 (disabled)."); | |
2705 | } | |
2706 | ||
2f77fc4b DG |
2707 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2708 | return 0; | |
2709 | ||
2710 | error_version: | |
2711 | modprobe_remove_lttng_control(); | |
2712 | ret = close(kernel_tracer_fd); | |
2713 | if (ret) { | |
2714 | PERROR("close"); | |
b551a063 | 2715 | } |
2f77fc4b | 2716 | kernel_tracer_fd = -1; |
f73fabfd | 2717 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2718 | |
2f77fc4b DG |
2719 | error_modules: |
2720 | ret = close(kernel_tracer_fd); | |
2721 | if (ret) { | |
2722 | PERROR("close"); | |
b551a063 | 2723 | } |
54d01ffb | 2724 | |
2f77fc4b DG |
2725 | error_open: |
2726 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2727 | |
2728 | error: | |
2f77fc4b DG |
2729 | WARN("No kernel tracer available"); |
2730 | kernel_tracer_fd = -1; | |
2731 | if (!is_root) { | |
f73fabfd | 2732 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2733 | } else { |
f73fabfd | 2734 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2735 | } |
54d01ffb DG |
2736 | } |
2737 | ||
2f77fc4b | 2738 | |
54d01ffb | 2739 | /* |
2f77fc4b DG |
2740 | * Copy consumer output from the tracing session to the domain session. The |
2741 | * function also applies the right modification on a per domain basis for the | |
2742 | * trace files destination directory. | |
36b588ed MD |
2743 | * |
2744 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2745 | */ |
2f77fc4b | 2746 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2747 | { |
2748 | int ret; | |
2f77fc4b DG |
2749 | const char *dir_name; |
2750 | struct consumer_output *consumer; | |
2751 | ||
2752 | assert(session); | |
2753 | assert(session->consumer); | |
54d01ffb | 2754 | |
b551a063 DG |
2755 | switch (domain) { |
2756 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2757 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2758 | /* |
2759 | * XXX: We should audit the session creation and what this function | |
2760 | * does "extra" in order to avoid a destroy since this function is used | |
2761 | * in the domain session creation (kernel and ust) only. Same for UST | |
2762 | * domain. | |
2763 | */ | |
2764 | if (session->kernel_session->consumer) { | |
6addfa37 | 2765 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2766 | } |
2f77fc4b DG |
2767 | session->kernel_session->consumer = |
2768 | consumer_copy_output(session->consumer); | |
2769 | /* Ease our life a bit for the next part */ | |
2770 | consumer = session->kernel_session->consumer; | |
2771 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2772 | break; |
f20baf8e | 2773 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2774 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2775 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2776 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2777 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2778 | if (session->ust_session->consumer) { |
6addfa37 | 2779 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2780 | } |
2f77fc4b DG |
2781 | session->ust_session->consumer = |
2782 | consumer_copy_output(session->consumer); | |
2783 | /* Ease our life a bit for the next part */ | |
2784 | consumer = session->ust_session->consumer; | |
2785 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2786 | break; |
2787 | default: | |
f73fabfd | 2788 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2789 | goto error; |
2790 | } | |
2791 | ||
2f77fc4b | 2792 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2793 | strncat(consumer->subdir, dir_name, |
2794 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2795 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2796 | ||
f73fabfd | 2797 | ret = LTTNG_OK; |
54d01ffb DG |
2798 | |
2799 | error: | |
2800 | return ret; | |
2801 | } | |
2802 | ||
00e2e675 | 2803 | /* |
2f77fc4b | 2804 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2805 | * |
2806 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2807 | */ |
2f77fc4b DG |
2808 | static int create_ust_session(struct ltt_session *session, |
2809 | struct lttng_domain *domain) | |
00e2e675 DG |
2810 | { |
2811 | int ret; | |
2f77fc4b | 2812 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2813 | |
a4b92340 | 2814 | assert(session); |
2f77fc4b DG |
2815 | assert(domain); |
2816 | assert(session->consumer); | |
a4b92340 | 2817 | |
2f77fc4b | 2818 | switch (domain->type) { |
f20baf8e | 2819 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2820 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2821 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2822 | case LTTNG_DOMAIN_UST: |
2823 | break; | |
2824 | default: | |
2825 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2826 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2827 | goto error; |
2828 | } | |
2829 | ||
2f77fc4b DG |
2830 | DBG("Creating UST session"); |
2831 | ||
dec56f6c | 2832 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2833 | if (lus == NULL) { |
f73fabfd | 2834 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2835 | goto error; |
2836 | } | |
2837 | ||
2f77fc4b DG |
2838 | lus->uid = session->uid; |
2839 | lus->gid = session->gid; | |
2bba9e53 | 2840 | lus->output_traces = session->output_traces; |
27babd3a | 2841 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2842 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2843 | session->ust_session = lus; |
d7ba1388 | 2844 | if (session->shm_path[0]) { |
3d071855 MD |
2845 | strncpy(lus->root_shm_path, session->shm_path, |
2846 | sizeof(lus->root_shm_path)); | |
2847 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2848 | strncpy(lus->shm_path, session->shm_path, |
2849 | sizeof(lus->shm_path)); | |
2850 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2851 | strncat(lus->shm_path, "/ust", | |
2852 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2853 | } | |
2f77fc4b DG |
2854 | /* Copy session output to the newly created UST session */ |
2855 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2856 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2857 | goto error; |
2858 | } | |
2859 | ||
f73fabfd | 2860 | return LTTNG_OK; |
00e2e675 DG |
2861 | |
2862 | error: | |
2f77fc4b DG |
2863 | free(lus); |
2864 | session->ust_session = NULL; | |
00e2e675 DG |
2865 | return ret; |
2866 | } | |
2867 | ||
2868 | /* | |
2f77fc4b | 2869 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2870 | */ |
2f77fc4b | 2871 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2872 | { |
2873 | int ret; | |
a4b92340 | 2874 | |
2f77fc4b | 2875 | DBG("Creating kernel session"); |
00e2e675 | 2876 | |
2f77fc4b DG |
2877 | ret = kernel_create_session(session, kernel_tracer_fd); |
2878 | if (ret < 0) { | |
f73fabfd | 2879 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2880 | goto error; |
2881 | } | |
2882 | ||
2f77fc4b DG |
2883 | /* Code flow safety */ |
2884 | assert(session->kernel_session); | |
2885 | ||
2886 | /* Copy session output to the newly created Kernel session */ | |
2887 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2888 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2889 | goto error; |
2890 | } | |
2891 | ||
2f77fc4b DG |
2892 | session->kernel_session->uid = session->uid; |
2893 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2894 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2895 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2896 | |
f73fabfd | 2897 | return LTTNG_OK; |
00e2e675 | 2898 | |
2f77fc4b DG |
2899 | error: |
2900 | trace_kernel_destroy_session(session->kernel_session); | |
2901 | session->kernel_session = NULL; | |
2902 | return ret; | |
2903 | } | |
00e2e675 | 2904 | |
2f77fc4b DG |
2905 | /* |
2906 | * Count number of session permitted by uid/gid. | |
2907 | */ | |
2908 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2909 | { | |
2910 | unsigned int i = 0; | |
2911 | struct ltt_session *session; | |
07424f16 | 2912 | |
2f77fc4b DG |
2913 | DBG("Counting number of available session for UID %d GID %d", |
2914 | uid, gid); | |
2915 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2916 | /* |
2f77fc4b | 2917 | * Only list the sessions the user can control. |
00e2e675 | 2918 | */ |
2f77fc4b DG |
2919 | if (!session_access_ok(session, uid, gid)) { |
2920 | continue; | |
2921 | } | |
2922 | i++; | |
a4b92340 | 2923 | } |
2f77fc4b | 2924 | return i; |
00e2e675 DG |
2925 | } |
2926 | ||
5c408ad8 JD |
2927 | /* |
2928 | * Check if the current kernel tracer supports the session rotation feature. | |
2929 | * Return 1 if it does, 0 otherwise. | |
2930 | */ | |
2931 | static int check_rotate_compatible(void) | |
2932 | { | |
2933 | int ret = 1; | |
2934 | ||
2935 | if (kernel_tracer_version.major != 2 || kernel_tracer_version.minor < 11) { | |
2936 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
2937 | ret = 0; | |
2938 | } | |
2939 | ||
2940 | return ret; | |
2941 | } | |
2942 | ||
54d01ffb DG |
2943 | /* |
2944 | * Process the command requested by the lttng client within the command | |
2945 | * context structure. This function make sure that the return structure (llm) | |
2946 | * is set and ready for transmission before returning. | |
2947 | * | |
2948 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2949 | * |
2950 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2951 | * |
2952 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2953 | */ |
53a80697 MD |
2954 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2955 | int *sock_error) | |
54d01ffb | 2956 | { |
f73fabfd | 2957 | int ret = LTTNG_OK; |
44d3bd01 | 2958 | int need_tracing_session = 1; |
2e09ba09 | 2959 | int need_domain; |
54d01ffb DG |
2960 | |
2961 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2962 | ||
3745d315 MD |
2963 | assert(!rcu_read_ongoing()); |
2964 | ||
53a80697 MD |
2965 | *sock_error = 0; |
2966 | ||
2e09ba09 MD |
2967 | switch (cmd_ctx->lsm->cmd_type) { |
2968 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2969 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2970 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2971 | case LTTNG_DESTROY_SESSION: |
2972 | case LTTNG_LIST_SESSIONS: | |
2973 | case LTTNG_LIST_DOMAINS: | |
2974 | case LTTNG_START_TRACE: | |
2975 | case LTTNG_STOP_TRACE: | |
6d805429 | 2976 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2977 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2978 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2979 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2980 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2981 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2982 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 2983 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 2984 | case LTTNG_REGENERATE_STATEDUMP: |
b3530820 JG |
2985 | case LTTNG_REGISTER_TRIGGER: |
2986 | case LTTNG_UNREGISTER_TRIGGER: | |
5c408ad8 | 2987 | case LTTNG_ROTATE_SESSION: |
d68c9a04 JD |
2988 | case LTTNG_ROTATION_GET_INFO: |
2989 | case LTTNG_SESSION_GET_CURRENT_OUTPUT: | |
259c2674 | 2990 | case LTTNG_ROTATION_SET_SCHEDULE: |
329f3443 JD |
2991 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
2992 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
2e09ba09 | 2993 | need_domain = 0; |
3aace903 | 2994 | break; |
2e09ba09 MD |
2995 | default: |
2996 | need_domain = 1; | |
2997 | } | |
2998 | ||
e6142f2e | 2999 | if (config.no_kernel && need_domain |
2e09ba09 | 3000 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { |
531d29f9 | 3001 | if (!is_root) { |
f73fabfd | 3002 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 3003 | } else { |
f73fabfd | 3004 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 3005 | } |
4fba7219 DG |
3006 | goto error; |
3007 | } | |
3008 | ||
8d3113b2 DG |
3009 | /* Deny register consumer if we already have a spawned consumer. */ |
3010 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
3011 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
3012 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 3013 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 3014 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
3015 | goto error; |
3016 | } | |
3017 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
3018 | } | |
3019 | ||
54d01ffb DG |
3020 | /* |
3021 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3022 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3023 | * command. |
3024 | */ | |
3025 | switch(cmd_ctx->lsm->cmd_type) { | |
3026 | case LTTNG_LIST_SESSIONS: | |
3027 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3028 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3029 | case LTTNG_LIST_DOMAINS: |
3030 | case LTTNG_LIST_CHANNELS: | |
3031 | case LTTNG_LIST_EVENTS: | |
834978fd | 3032 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 3033 | case LTTNG_LIST_TRACKER_PIDS: |
5cd0780d | 3034 | case LTTNG_DATA_PENDING: |
5c408ad8 | 3035 | case LTTNG_ROTATE_SESSION: |
d68c9a04 | 3036 | case LTTNG_ROTATION_GET_INFO: |
329f3443 JD |
3037 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
3038 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
54d01ffb DG |
3039 | break; |
3040 | default: | |
3041 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 3042 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
3043 | if (ret < 0) { |
3044 | /* This label does not try to unlock the session */ | |
3045 | goto init_setup_error; | |
3046 | } | |
3047 | } | |
3048 | ||
3049 | /* Commands that DO NOT need a session. */ | |
3050 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3051 | case LTTNG_CREATE_SESSION: |
27babd3a | 3052 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3053 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
3054 | case LTTNG_LIST_SESSIONS: |
3055 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3056 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3057 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3058 | case LTTNG_SAVE_SESSION: |
b3530820 JG |
3059 | case LTTNG_REGISTER_TRIGGER: |
3060 | case LTTNG_UNREGISTER_TRIGGER: | |
44d3bd01 | 3061 | need_tracing_session = 0; |
54d01ffb DG |
3062 | break; |
3063 | default: | |
3064 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3065 | /* |
3066 | * We keep the session list lock across _all_ commands | |
3067 | * for now, because the per-session lock does not | |
3068 | * handle teardown properly. | |
3069 | */ | |
74babd95 | 3070 | session_lock_list(); |
54d01ffb DG |
3071 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3072 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3073 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3074 | goto error; |
3075 | } else { | |
3076 | /* Acquire lock for the session */ | |
3077 | session_lock(cmd_ctx->session); | |
3078 | } | |
3079 | break; | |
3080 | } | |
b389abbe | 3081 | |
5f3ecf22 DG |
3082 | /* |
3083 | * Commands that need a valid session but should NOT create one if none | |
3084 | * exists. Instead of creating one and destroying it when the command is | |
3085 | * handled, process that right before so we save some round trip in useless | |
3086 | * code path. | |
3087 | */ | |
3088 | switch (cmd_ctx->lsm->cmd_type) { | |
3089 | case LTTNG_DISABLE_CHANNEL: | |
3090 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3091 | switch (cmd_ctx->lsm->domain.type) { |
3092 | case LTTNG_DOMAIN_KERNEL: | |
3093 | if (!cmd_ctx->session->kernel_session) { | |
3094 | ret = LTTNG_ERR_NO_CHANNEL; | |
3095 | goto error; | |
3096 | } | |
3097 | break; | |
3098 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3099 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3100 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3101 | case LTTNG_DOMAIN_UST: |
3102 | if (!cmd_ctx->session->ust_session) { | |
3103 | ret = LTTNG_ERR_NO_CHANNEL; | |
3104 | goto error; | |
3105 | } | |
3106 | break; | |
3107 | default: | |
3108 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3109 | goto error; | |
3110 | } | |
3111 | default: | |
3112 | break; | |
3113 | } | |
3114 | ||
2e09ba09 MD |
3115 | if (!need_domain) { |
3116 | goto skip_domain; | |
3117 | } | |
a4b92340 | 3118 | |
54d01ffb DG |
3119 | /* |
3120 | * Check domain type for specific "pre-action". | |
3121 | */ | |
3122 | switch (cmd_ctx->lsm->domain.type) { | |
3123 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3124 | if (!is_root) { |
f73fabfd | 3125 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3126 | goto error; |
3127 | } | |
3128 | ||
54d01ffb | 3129 | /* Kernel tracer check */ |
a4b35e07 | 3130 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3131 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3132 | ret = init_kernel_tracer(); |
3133 | if (ret != 0) { | |
54d01ffb DG |
3134 | goto error; |
3135 | } | |
3136 | } | |
5eb91c98 | 3137 | |
5c827ce0 DG |
3138 | /* Consumer is in an ERROR state. Report back to client */ |
3139 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3140 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3141 | goto error; |
3142 | } | |
3143 | ||
54d01ffb | 3144 | /* Need a session for kernel command */ |
44d3bd01 | 3145 | if (need_tracing_session) { |
54d01ffb | 3146 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3147 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3148 | if (ret < 0) { |
f73fabfd | 3149 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3150 | goto error; |
3151 | } | |
b389abbe | 3152 | } |
7d29a247 | 3153 | |
54d01ffb | 3154 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3155 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3156 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3157 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3158 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3159 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3160 | if (ret < 0) { |
f73fabfd | 3161 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3162 | goto error; |
950131af | 3163 | } |
5c827ce0 | 3164 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3165 | } else { |
3166 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3167 | } |
173af62f | 3168 | |
a4b92340 DG |
3169 | /* |
3170 | * The consumer was just spawned so we need to add the socket to | |
3171 | * the consumer output of the session if exist. | |
3172 | */ | |
3173 | ret = consumer_create_socket(&kconsumer_data, | |
3174 | cmd_ctx->session->kernel_session->consumer); | |
3175 | if (ret < 0) { | |
3176 | goto error; | |
173af62f | 3177 | } |
0d0c377a | 3178 | } |
5c827ce0 | 3179 | |
54d01ffb | 3180 | break; |
b9dfb167 | 3181 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3182 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3183 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3184 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3185 | { |
b51ec5b4 MD |
3186 | if (!ust_app_supported()) { |
3187 | ret = LTTNG_ERR_NO_UST; | |
3188 | goto error; | |
3189 | } | |
5c827ce0 DG |
3190 | /* Consumer is in an ERROR state. Report back to client */ |
3191 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3192 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3193 | goto error; |
3194 | } | |
3195 | ||
44d3bd01 | 3196 | if (need_tracing_session) { |
a4b92340 | 3197 | /* Create UST session if none exist. */ |
f6a9efaa | 3198 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3199 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3200 | &cmd_ctx->lsm->domain); |
f73fabfd | 3201 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3202 | goto error; |
3203 | } | |
3204 | } | |
00e2e675 | 3205 | |
7753dea8 MD |
3206 | /* Start the UST consumer daemons */ |
3207 | /* 64-bit */ | |
3208 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
e6142f2e | 3209 | if (config.consumerd64_bin_path.value && |
7753dea8 | 3210 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3211 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3212 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3213 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3214 | if (ret < 0) { |
f73fabfd | 3215 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3216 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3217 | goto error; |
3218 | } | |
48842b30 | 3219 | |
173af62f | 3220 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3221 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3222 | } else { |
7753dea8 MD |
3223 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3224 | } | |
173af62f DG |
3225 | |
3226 | /* | |
3227 | * Setup socket for consumer 64 bit. No need for atomic access | |
3228 | * since it was set above and can ONLY be set in this thread. | |
3229 | */ | |
a4b92340 DG |
3230 | ret = consumer_create_socket(&ustconsumer64_data, |
3231 | cmd_ctx->session->ust_session->consumer); | |
3232 | if (ret < 0) { | |
3233 | goto error; | |
173af62f DG |
3234 | } |
3235 | ||
7753dea8 | 3236 | /* 32-bit */ |
385b881b | 3237 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
e6142f2e | 3238 | if (config.consumerd32_bin_path.value && |
7753dea8 | 3239 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3240 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3241 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3242 | ret = start_consumerd(&ustconsumer32_data); | |
3243 | if (ret < 0) { | |
f73fabfd | 3244 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3245 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3246 | goto error; |
3247 | } | |
5c827ce0 | 3248 | |
173af62f | 3249 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3250 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3251 | } else { |
3252 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3253 | } |
173af62f DG |
3254 | |
3255 | /* | |
3256 | * Setup socket for consumer 64 bit. No need for atomic access | |
3257 | * since it was set above and can ONLY be set in this thread. | |
3258 | */ | |
a4b92340 DG |
3259 | ret = consumer_create_socket(&ustconsumer32_data, |
3260 | cmd_ctx->session->ust_session->consumer); | |
3261 | if (ret < 0) { | |
3262 | goto error; | |
173af62f | 3263 | } |
44d3bd01 DG |
3264 | } |
3265 | break; | |
48842b30 | 3266 | } |
54d01ffb | 3267 | default: |
54d01ffb DG |
3268 | break; |
3269 | } | |
2e09ba09 | 3270 | skip_domain: |
33a2b854 | 3271 | |
5c827ce0 DG |
3272 | /* Validate consumer daemon state when start/stop trace command */ |
3273 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3274 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3275 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3276 | case LTTNG_DOMAIN_NONE: |
3277 | break; | |
b9dfb167 | 3278 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3279 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3280 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3281 | case LTTNG_DOMAIN_UST: |
3282 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3283 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3284 | goto error; |
3285 | } | |
3286 | break; | |
3287 | case LTTNG_DOMAIN_KERNEL: | |
3288 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3289 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3290 | goto error; |
3291 | } | |
3292 | break; | |
825535cc JG |
3293 | default: |
3294 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3295 | goto error; | |
5c827ce0 DG |
3296 | } |
3297 | } | |
3298 | ||
8e0af1b4 MD |
3299 | /* |
3300 | * Check that the UID or GID match that of the tracing session. | |
3301 | * The root user can interact with all sessions. | |
3302 | */ | |
3303 | if (need_tracing_session) { | |
3304 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3305 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3306 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3307 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3308 | goto error; |
3309 | } | |
3310 | } | |
3311 | ||
ffe60014 DG |
3312 | /* |
3313 | * Send relayd information to consumer as soon as we have a domain and a | |
3314 | * session defined. | |
3315 | */ | |
3316 | if (cmd_ctx->session && need_domain) { | |
3317 | /* | |
3318 | * Setup relayd if not done yet. If the relayd information was already | |
3319 | * sent to the consumer, this call will gracefully return. | |
3320 | */ | |
3321 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3322 | if (ret != LTTNG_OK) { | |
3323 | goto error; | |
3324 | } | |
3325 | } | |
3326 | ||
54d01ffb DG |
3327 | /* Process by command type */ |
3328 | switch (cmd_ctx->lsm->cmd_type) { | |
3329 | case LTTNG_ADD_CONTEXT: | |
3330 | { | |
2001793c JG |
3331 | /* |
3332 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3333 | * payload if the context being added is an application context. | |
3334 | */ | |
3335 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3336 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3337 | char *provider_name = NULL, *context_name = NULL; | |
3338 | size_t provider_name_len = | |
3339 | cmd_ctx->lsm->u.context.provider_name_len; | |
3340 | size_t context_name_len = | |
3341 | cmd_ctx->lsm->u.context.context_name_len; | |
3342 | ||
3343 | if (provider_name_len == 0 || context_name_len == 0) { | |
3344 | /* | |
3345 | * Application provider and context names MUST | |
3346 | * be provided. | |
3347 | */ | |
3348 | ret = -LTTNG_ERR_INVALID; | |
3349 | goto error; | |
3350 | } | |
3351 | ||
3352 | provider_name = zmalloc(provider_name_len + 1); | |
3353 | if (!provider_name) { | |
3354 | ret = -LTTNG_ERR_NOMEM; | |
3355 | goto error; | |
3356 | } | |
e0f4d107 JG |
3357 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3358 | provider_name; | |
2001793c JG |
3359 | |
3360 | context_name = zmalloc(context_name_len + 1); | |
3361 | if (!context_name) { | |
3362 | ret = -LTTNG_ERR_NOMEM; | |
3363 | goto error_add_context; | |
3364 | } | |
e0f4d107 JG |
3365 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3366 | context_name; | |
2001793c JG |
3367 | |
3368 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3369 | provider_name_len); | |
3370 | if (ret < 0) { | |
3371 | goto error_add_context; | |
3372 | } | |
3373 | ||
3374 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3375 | context_name_len); | |
3376 | if (ret < 0) { | |
3377 | goto error_add_context; | |
3378 | } | |
2001793c JG |
3379 | } |
3380 | ||
3381 | /* | |
3382 | * cmd_add_context assumes ownership of the provider and context | |
3383 | * names. | |
3384 | */ | |
3385 | ret = cmd_add_context(cmd_ctx->session, | |
3386 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3387 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3388 | &cmd_ctx->lsm->u.context.ctx, |
3389 | kernel_poll_pipe[1]); | |
3390 | ||
3391 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3392 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3393 | error_add_context: | |
3394 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3395 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3396 | if (ret < 0) { | |
3397 | goto error; | |
3398 | } | |
54d01ffb DG |
3399 | break; |
3400 | } | |
3401 | case LTTNG_DISABLE_CHANNEL: | |
3402 | { | |
3403 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3404 | cmd_ctx->lsm->u.disable.channel_name); | |
3405 | break; | |
3406 | } | |
3407 | case LTTNG_DISABLE_EVENT: | |
3408 | { | |
47b7e2f9 JG |
3409 | |
3410 | /* | |
3411 | * FIXME: handle filter; for now we just receive the filter's | |
3412 | * bytecode along with the filter expression which are sent by | |
3413 | * liblttng-ctl and discard them. | |
3414 | * | |
3415 | * This fixes an issue where the client may block while sending | |
3416 | * the filter payload and encounter an error because the session | |
3417 | * daemon closes the socket without ever handling this data. | |
3418 | */ | |
3419 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3420 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3421 | ||
3422 | if (count) { | |
3423 | char data[LTTNG_FILTER_MAX_LEN]; | |
3424 | ||
3425 | DBG("Discarding disable event command payload of size %zu", count); | |
3426 | while (count) { | |
3427 | ret = lttcomm_recv_unix_sock(sock, data, | |
3428 | count > sizeof(data) ? sizeof(data) : count); | |
3429 | if (ret < 0) { | |
3430 | goto error; | |
3431 | } | |
3432 | ||
3433 | count -= (size_t) ret; | |
3434 | } | |
3435 | } | |
6e911cad | 3436 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3437 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3438 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3439 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3440 | break; |
3441 | } | |
54d01ffb DG |
3442 | case LTTNG_ENABLE_CHANNEL: |
3443 | { | |
b3530820 JG |
3444 | cmd_ctx->lsm->u.channel.chan.attr.extended.ptr = |
3445 | (struct lttng_channel_extended *) &cmd_ctx->lsm->u.channel.extended; | |
7972aab2 | 3446 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
b3530820 JG |
3447 | &cmd_ctx->lsm->u.channel.chan, |
3448 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3449 | break; |
3450 | } | |
ccf10263 MD |
3451 | case LTTNG_TRACK_PID: |
3452 | { | |
3453 | ret = cmd_track_pid(cmd_ctx->session, | |
3454 | cmd_ctx->lsm->domain.type, | |
3455 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3456 | break; | |
3457 | } | |
3458 | case LTTNG_UNTRACK_PID: | |
3459 | { | |
3460 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3461 | cmd_ctx->lsm->domain.type, | |
3462 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3463 | break; | |
3464 | } | |
54d01ffb DG |
3465 | case LTTNG_ENABLE_EVENT: |
3466 | { | |
882ef835 JI |
3467 | struct lttng_event_exclusion *exclusion = NULL; |
3468 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3469 | char *filter_expression = NULL; |
882ef835 | 3470 | |
67676bd8 DG |
3471 | /* Handle exclusion events and receive it from the client. */ |
3472 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3473 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3474 | ||
3475 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3476 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3477 | if (!exclusion) { | |
3478 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3479 | goto error; | |
882ef835 | 3480 | } |
882ef835 | 3481 | |
67676bd8 DG |
3482 | DBG("Receiving var len exclusion event list from client ..."); |
3483 | exclusion->count = count; | |
3484 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3485 | count * LTTNG_SYMBOL_NAME_LEN); | |
3486 | if (ret <= 0) { | |
3487 | DBG("Nothing recv() from client var len data... continuing"); | |
3488 | *sock_error = 1; | |
3489 | free(exclusion); | |
3490 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3491 | goto error; | |
3492 | } | |
3493 | } | |
3494 | ||
6b453b5e JG |
3495 | /* Get filter expression from client. */ |
3496 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3497 | size_t expression_len = | |
3498 | cmd_ctx->lsm->u.enable.expression_len; | |
3499 | ||
3500 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3501 | ret = LTTNG_ERR_FILTER_INVAL; | |
3502 | free(exclusion); | |
3503 | goto error; | |
3504 | } | |
3505 | ||
3506 | filter_expression = zmalloc(expression_len); | |
3507 | if (!filter_expression) { | |
3508 | free(exclusion); | |
3509 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3510 | goto error; | |
3511 | } | |
3512 | ||
3513 | /* Receive var. len. data */ | |
3514 | DBG("Receiving var len filter's expression from client ..."); | |
3515 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3516 | expression_len); | |
3517 | if (ret <= 0) { | |
3518 | DBG("Nothing recv() from client car len data... continuing"); | |
3519 | *sock_error = 1; | |
3520 | free(filter_expression); | |
3521 | free(exclusion); | |
3522 | ret = LTTNG_ERR_FILTER_INVAL; | |
3523 | goto error; | |
3524 | } | |
3525 | } | |
3526 | ||
67676bd8 DG |
3527 | /* Handle filter and get bytecode from client. */ |
3528 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3529 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3530 | ||
3531 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3532 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3533 | free(filter_expression); |
67676bd8 DG |
3534 | free(exclusion); |
3535 | goto error; | |
3536 | } | |
3537 | ||
3538 | bytecode = zmalloc(bytecode_len); | |
3539 | if (!bytecode) { | |
49d21f93 | 3540 | free(filter_expression); |
67676bd8 DG |
3541 | free(exclusion); |
3542 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3543 | goto error; | |
882ef835 JI |
3544 | } |
3545 | ||
67676bd8 DG |
3546 | /* Receive var. len. data */ |
3547 | DBG("Receiving var len filter's bytecode from client ..."); | |
3548 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3549 | if (ret <= 0) { | |
3550 | DBG("Nothing recv() from client car len data... continuing"); | |
3551 | *sock_error = 1; | |
49d21f93 | 3552 | free(filter_expression); |
67676bd8 DG |
3553 | free(bytecode); |
3554 | free(exclusion); | |
3555 | ret = LTTNG_ERR_FILTER_INVAL; | |
3556 | goto error; | |
3557 | } | |
3558 | ||
3559 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3560 | free(filter_expression); |
67676bd8 DG |
3561 | free(bytecode); |
3562 | free(exclusion); | |
3563 | ret = LTTNG_ERR_FILTER_INVAL; | |
3564 | goto error; | |
3565 | } | |
882ef835 | 3566 | } |
67676bd8 DG |
3567 | |
3568 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3569 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3570 | &cmd_ctx->lsm->u.enable.event, |
3571 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3572 | kernel_poll_pipe[1]); |
54d01ffb DG |
3573 | break; |
3574 | } | |
052da939 | 3575 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3576 | { |
9f19cc17 | 3577 | struct lttng_event *events; |
54d01ffb | 3578 | ssize_t nb_events; |
052da939 | 3579 | |
0845bbfa | 3580 | session_lock_list(); |
54d01ffb | 3581 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3582 | session_unlock_list(); |
54d01ffb | 3583 | if (nb_events < 0) { |
f73fabfd | 3584 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3585 | ret = -nb_events; |
3586 | goto error; | |
2ef84c95 DG |
3587 | } |
3588 | ||
3589 | /* | |
3590 | * Setup lttng message with payload size set to the event list size in | |
3591 | * bytes and then copy list into the llm payload. | |
3592 | */ | |
6e10c9b9 PP |
3593 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3594 | sizeof(struct lttng_event) * nb_events); | |
3595 | free(events); | |
3596 | ||
2ef84c95 DG |
3597 | if (ret < 0) { |
3598 | goto setup_error; | |
3599 | } | |
3600 | ||
f73fabfd | 3601 | ret = LTTNG_OK; |
2ef84c95 DG |
3602 | break; |
3603 | } | |
f37d259d MD |
3604 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3605 | { | |
3606 | struct lttng_event_field *fields; | |
3607 | ssize_t nb_fields; | |
3608 | ||
0845bbfa | 3609 | session_lock_list(); |
a4b92340 DG |
3610 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3611 | &fields); | |
0845bbfa | 3612 | session_unlock_list(); |
f37d259d | 3613 | if (nb_fields < 0) { |
f73fabfd | 3614 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3615 | ret = -nb_fields; |
3616 | goto error; | |
3617 | } | |
3618 | ||
3619 | /* | |
3620 | * Setup lttng message with payload size set to the event list size in | |
3621 | * bytes and then copy list into the llm payload. | |
3622 | */ | |
6e10c9b9 | 3623 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3624 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3625 | free(fields); |
3626 | ||
f37d259d | 3627 | if (ret < 0) { |
f37d259d MD |
3628 | goto setup_error; |
3629 | } | |
3630 | ||
f73fabfd | 3631 | ret = LTTNG_OK; |
f37d259d MD |
3632 | break; |
3633 | } | |
834978fd DG |
3634 | case LTTNG_LIST_SYSCALLS: |
3635 | { | |
3636 | struct lttng_event *events; | |
3637 | ssize_t nb_events; | |
3638 | ||
3639 | nb_events = cmd_list_syscalls(&events); | |
3640 | if (nb_events < 0) { | |
3641 | /* Return value is a negative lttng_error_code. */ | |
3642 | ret = -nb_events; | |
3643 | goto error; | |
3644 | } | |
3645 | ||
3646 | /* | |
3647 | * Setup lttng message with payload size set to the event list size in | |
3648 | * bytes and then copy list into the llm payload. | |
3649 | */ | |
6e10c9b9 PP |
3650 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3651 | sizeof(struct lttng_event) * nb_events); | |
3652 | free(events); | |
3653 | ||
834978fd | 3654 | if (ret < 0) { |
834978fd DG |
3655 | goto setup_error; |
3656 | } | |
3657 | ||
834978fd DG |
3658 | ret = LTTNG_OK; |
3659 | break; | |
3660 | } | |
a5dfbb9d MD |
3661 | case LTTNG_LIST_TRACKER_PIDS: |
3662 | { | |
3663 | int32_t *pids = NULL; | |
3664 | ssize_t nr_pids; | |
3665 | ||
3666 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3667 | cmd_ctx->lsm->domain.type, &pids); | |
3668 | if (nr_pids < 0) { | |
3669 | /* Return value is a negative lttng_error_code. */ | |
3670 | ret = -nr_pids; | |
3671 | goto error; | |
3672 | } | |
3673 | ||
3674 | /* | |
3675 | * Setup lttng message with payload size set to the event list size in | |
3676 | * bytes and then copy list into the llm payload. | |
3677 | */ | |
6e10c9b9 PP |
3678 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3679 | sizeof(int32_t) * nr_pids); | |
3680 | free(pids); | |
3681 | ||
a5dfbb9d | 3682 | if (ret < 0) { |
a5dfbb9d MD |
3683 | goto setup_error; |
3684 | } | |
3685 | ||
a5dfbb9d MD |
3686 | ret = LTTNG_OK; |
3687 | break; | |
3688 | } | |
00e2e675 DG |
3689 | case LTTNG_SET_CONSUMER_URI: |
3690 | { | |
a4b92340 DG |
3691 | size_t nb_uri, len; |
3692 | struct lttng_uri *uris; | |
3693 | ||
3694 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3695 | len = nb_uri * sizeof(struct lttng_uri); | |
3696 | ||
3697 | if (nb_uri == 0) { | |
f73fabfd | 3698 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3699 | goto error; |
3700 | } | |
3701 | ||
3702 | uris = zmalloc(len); | |
3703 | if (uris == NULL) { | |
f73fabfd | 3704 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3705 | goto error; |
3706 | } | |
3707 | ||
3708 | /* Receive variable len data */ | |
77c7c900 | 3709 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3710 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3711 | if (ret <= 0) { | |
3712 | DBG("No URIs received from client... continuing"); | |
3713 | *sock_error = 1; | |
f73fabfd | 3714 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3715 | free(uris); |
a4b92340 DG |
3716 | goto error; |
3717 | } | |
3718 | ||
bda32d56 JG |
3719 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3720 | free(uris); | |
f73fabfd | 3721 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3722 | goto error; |
3723 | } | |
3724 | ||
b1d41407 | 3725 | |
00e2e675 DG |
3726 | break; |
3727 | } | |
f3ed775e | 3728 | case LTTNG_START_TRACE: |
8c0faa1d | 3729 | { |
259c2674 JD |
3730 | /* |
3731 | * On the first start, if we have a kernel session and we have | |
3732 | * enabled time or size-based rotations, we have to make sure | |
3733 | * the kernel tracer supports it. | |
3734 | */ | |
3735 | if (!cmd_ctx->session->has_been_started && \ | |
3736 | cmd_ctx->session->kernel_session && \ | |
3737 | (cmd_ctx->session->rotate_timer_period || \ | |
3738 | cmd_ctx->session->rotate_size) && \ | |
3739 | !check_rotate_compatible()) { | |
3740 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
3741 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
3742 | goto error; | |
3743 | } | |
54d01ffb | 3744 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3745 | break; |
3746 | } | |
f3ed775e | 3747 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3748 | { |
54d01ffb | 3749 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3750 | break; |
3751 | } | |
5e16da05 MD |
3752 | case LTTNG_CREATE_SESSION: |
3753 | { | |
a4b92340 DG |
3754 | size_t nb_uri, len; |
3755 | struct lttng_uri *uris = NULL; | |
3756 | ||
3757 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3758 | len = nb_uri * sizeof(struct lttng_uri); | |
3759 | ||
3760 | if (nb_uri > 0) { | |
3761 | uris = zmalloc(len); | |
3762 | if (uris == NULL) { | |
f73fabfd | 3763 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3764 | goto error; |
3765 | } | |
3766 | ||
3767 | /* Receive variable len data */ | |
77c7c900 | 3768 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3769 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3770 | if (ret <= 0) { | |
3771 | DBG("No URIs received from client... continuing"); | |
3772 | *sock_error = 1; | |
f73fabfd | 3773 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3774 | free(uris); |
a4b92340 DG |
3775 | goto error; |
3776 | } | |
3777 | ||
3778 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3779 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3780 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3781 | free(uris); |
a4b92340 DG |
3782 | goto error; |
3783 | } | |
3784 | } | |
3785 | ||
3786 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3787 | &cmd_ctx->creds, 0); |
a4b92340 | 3788 | |
b1d41407 DG |
3789 | free(uris); |
3790 | ||
00e2e675 DG |
3791 | break; |
3792 | } | |
5e16da05 MD |
3793 | case LTTNG_DESTROY_SESSION: |
3794 | { | |
90936dcf JD |
3795 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1], |
3796 | notification_thread_handle); | |
a4b92340 DG |
3797 | |
3798 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3799 | cmd_ctx->session = NULL; |
5461b305 | 3800 | break; |
5e16da05 | 3801 | } |
9f19cc17 | 3802 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3803 | { |
54d01ffb | 3804 | ssize_t nb_dom; |
fa64dfb4 | 3805 | struct lttng_domain *domains = NULL; |
5461b305 | 3806 | |
54d01ffb DG |
3807 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3808 | if (nb_dom < 0) { | |
f73fabfd | 3809 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3810 | ret = -nb_dom; |
3811 | goto error; | |
ce3d728c | 3812 | } |
520ff687 | 3813 | |
6e10c9b9 PP |
3814 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3815 | nb_dom * sizeof(struct lttng_domain)); | |
3816 | free(domains); | |
3817 | ||
5461b305 DG |
3818 | if (ret < 0) { |
3819 | goto setup_error; | |
520ff687 | 3820 | } |
57167058 | 3821 | |
f73fabfd | 3822 | ret = LTTNG_OK; |
5e16da05 MD |
3823 | break; |
3824 | } | |
9f19cc17 | 3825 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3826 | { |
53e367f9 | 3827 | ssize_t payload_size; |
ade7ce52 | 3828 | struct lttng_channel *channels = NULL; |
54d01ffb | 3829 | |
53e367f9 | 3830 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3831 | cmd_ctx->session, &channels); |
53e367f9 | 3832 | if (payload_size < 0) { |
f73fabfd | 3833 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3834 | ret = -payload_size; |
54d01ffb | 3835 | goto error; |
5461b305 | 3836 | } |
ca95a216 | 3837 | |
6e10c9b9 | 3838 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3839 | payload_size); |
6e10c9b9 PP |
3840 | free(channels); |
3841 | ||
5461b305 DG |
3842 | if (ret < 0) { |
3843 | goto setup_error; | |
3844 | } | |
9f19cc17 | 3845 | |
f73fabfd | 3846 | ret = LTTNG_OK; |
5461b305 | 3847 | break; |
5e16da05 | 3848 | } |
9f19cc17 | 3849 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3850 | { |
b551a063 | 3851 | ssize_t nb_event; |
684d34d2 | 3852 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3853 | struct lttcomm_event_command_header cmd_header; |
3854 | size_t total_size; | |
3855 | ||
b2d66287 | 3856 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3857 | /* Extended infos are included at the end of events */ |
3858 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3859 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3860 | &events, &total_size); | |
9f19cc17 | 3861 | |
54d01ffb | 3862 | if (nb_event < 0) { |
f73fabfd | 3863 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3864 | ret = -nb_event; |
3865 | goto error; | |
5461b305 | 3866 | } |
ca95a216 | 3867 | |
b4e3ceb9 PP |
3868 | cmd_header.nb_events = nb_event; |
3869 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
3870 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
3871 | free(events); |
3872 | ||
5461b305 DG |
3873 | if (ret < 0) { |
3874 | goto setup_error; | |
3875 | } | |
9f19cc17 | 3876 | |
f73fabfd | 3877 | ret = LTTNG_OK; |
5461b305 | 3878 | break; |
5e16da05 MD |
3879 | } |
3880 | case LTTNG_LIST_SESSIONS: | |
3881 | { | |
8e0af1b4 | 3882 | unsigned int nr_sessions; |
6e10c9b9 PP |
3883 | void *sessions_payload; |
3884 | size_t payload_len; | |
5461b305 | 3885 | |
8e0af1b4 | 3886 | session_lock_list(); |
730389d9 DG |
3887 | nr_sessions = lttng_sessions_count( |
3888 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3889 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
3890 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
3891 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 3892 | |
6e10c9b9 | 3893 | if (!sessions_payload) { |
54d01ffb | 3894 | session_unlock_list(); |
6e10c9b9 | 3895 | ret = -ENOMEM; |
5461b305 | 3896 | goto setup_error; |
e065084a | 3897 | } |
5e16da05 | 3898 | |
6e10c9b9 | 3899 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
3900 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3901 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 3902 | session_unlock_list(); |
5e16da05 | 3903 | |
6e10c9b9 PP |
3904 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
3905 | payload_len); | |
3906 | free(sessions_payload); | |
3907 | ||
3908 | if (ret < 0) { | |
3909 | goto setup_error; | |
3910 | } | |
3911 | ||
f73fabfd | 3912 | ret = LTTNG_OK; |
5e16da05 MD |
3913 | break; |
3914 | } | |
d9800920 DG |
3915 | case LTTNG_REGISTER_CONSUMER: |
3916 | { | |
2f77fc4b DG |
3917 | struct consumer_data *cdata; |
3918 | ||
3919 | switch (cmd_ctx->lsm->domain.type) { | |
3920 | case LTTNG_DOMAIN_KERNEL: | |
3921 | cdata = &kconsumer_data; | |
3922 | break; | |
3923 | default: | |
f73fabfd | 3924 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3925 | goto error; |
3926 | } | |
3927 | ||
54d01ffb | 3928 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3929 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3930 | break; |
3931 | } | |
6d805429 | 3932 | case LTTNG_DATA_PENDING: |
806e2684 | 3933 | { |
f6151c55 | 3934 | int pending_ret; |
6e10c9b9 | 3935 | uint8_t pending_ret_byte; |
f6151c55 JG |
3936 | |
3937 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 3938 | |
f6151c55 JG |
3939 | /* |
3940 | * FIXME | |
3941 | * | |
3942 | * This function may returns 0 or 1 to indicate whether or not | |
3943 | * there is data pending. In case of error, it should return an | |
3944 | * LTTNG_ERR code. However, some code paths may still return | |
3945 | * a nondescript error code, which we handle by returning an | |
3946 | * "unknown" error. | |
3947 | */ | |
3948 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
3949 | /* |
3950 | * ret will be set to LTTNG_OK at the end of | |
3951 | * this function. | |
3952 | */ | |
f6151c55 JG |
3953 | } else if (pending_ret < 0) { |
3954 | ret = LTTNG_ERR_UNK; | |
3955 | goto setup_error; | |
3956 | } else { | |
3957 | ret = pending_ret; | |
3958 | goto setup_error; | |
3959 | } | |
3960 | ||
6e10c9b9 PP |
3961 | pending_ret_byte = (uint8_t) pending_ret; |
3962 | ||
3963 | /* 1 byte to return whether or not data is pending */ | |
3964 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
3965 | &pending_ret_byte, 1); | |
3966 | ||
3967 | if (ret < 0) { | |
3968 | goto setup_error; | |
3969 | } | |
3970 | ||
3971 | ret = LTTNG_OK; | |
806e2684 DG |
3972 | break; |
3973 | } | |
da3c9ec1 DG |
3974 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3975 | { | |
6dc3064a DG |
3976 | struct lttcomm_lttng_output_id reply; |
3977 | ||
3978 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3979 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3980 | if (ret != LTTNG_OK) { | |
3981 | goto error; | |
3982 | } | |
3983 | ||
6e10c9b9 PP |
3984 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
3985 | sizeof(reply)); | |
6dc3064a DG |
3986 | if (ret < 0) { |
3987 | goto setup_error; | |
3988 | } | |
3989 | ||
3990 | /* Copy output list into message payload */ | |
6dc3064a | 3991 | ret = LTTNG_OK; |
da3c9ec1 DG |
3992 | break; |
3993 | } | |
3994 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3995 | { | |
6dc3064a DG |
3996 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3997 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3998 | break; |
3999 | } | |
4000 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
4001 | { | |
6dc3064a DG |
4002 | ssize_t nb_output; |
4003 | struct lttng_snapshot_output *outputs = NULL; | |
4004 | ||
4005 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
4006 | if (nb_output < 0) { | |
4007 | ret = -nb_output; | |
4008 | goto error; | |
4009 | } | |
4010 | ||
6e10c9b9 PP |
4011 | assert((nb_output > 0 && outputs) || nb_output == 0); |
4012 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 4013 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
4014 | free(outputs); |
4015 | ||
6dc3064a | 4016 | if (ret < 0) { |
6dc3064a DG |
4017 | goto setup_error; |
4018 | } | |
4019 | ||
6dc3064a | 4020 | ret = LTTNG_OK; |
da3c9ec1 DG |
4021 | break; |
4022 | } | |
4023 | case LTTNG_SNAPSHOT_RECORD: | |
4024 | { | |
6dc3064a DG |
4025 | ret = cmd_snapshot_record(cmd_ctx->session, |
4026 | &cmd_ctx->lsm->u.snapshot_record.output, | |
4027 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
4028 | break; |
4029 | } | |
27babd3a DG |
4030 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
4031 | { | |
4032 | size_t nb_uri, len; | |
4033 | struct lttng_uri *uris = NULL; | |
4034 | ||
4035 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4036 | len = nb_uri * sizeof(struct lttng_uri); | |
4037 | ||
4038 | if (nb_uri > 0) { | |
4039 | uris = zmalloc(len); | |
4040 | if (uris == NULL) { | |
4041 | ret = LTTNG_ERR_FATAL; | |
4042 | goto error; | |
4043 | } | |
4044 | ||
4045 | /* Receive variable len data */ | |
4046 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4047 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4048 | if (ret <= 0) { | |
4049 | DBG("No URIs received from client... continuing"); | |
4050 | *sock_error = 1; | |
4051 | ret = LTTNG_ERR_SESSION_FAIL; | |
4052 | free(uris); | |
4053 | goto error; | |
4054 | } | |
4055 | ||
4056 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4057 | DBG("Creating session with ONE network URI is a bad call"); | |
4058 | ret = LTTNG_ERR_SESSION_FAIL; | |
4059 | free(uris); | |
4060 | goto error; | |
4061 | } | |
4062 | } | |
4063 | ||
4064 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4065 | nb_uri, &cmd_ctx->creds); | |
4066 | free(uris); | |
4067 | break; | |
4068 | } | |
ecc48a90 JD |
4069 | case LTTNG_CREATE_SESSION_LIVE: |
4070 | { | |
4071 | size_t nb_uri, len; | |
4072 | struct lttng_uri *uris = NULL; | |
4073 | ||
4074 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4075 | len = nb_uri * sizeof(struct lttng_uri); | |
4076 | ||
4077 | if (nb_uri > 0) { | |
4078 | uris = zmalloc(len); | |
4079 | if (uris == NULL) { | |
4080 | ret = LTTNG_ERR_FATAL; | |
4081 | goto error; | |
4082 | } | |
4083 | ||
4084 | /* Receive variable len data */ | |
4085 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4086 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4087 | if (ret <= 0) { | |
4088 | DBG("No URIs received from client... continuing"); | |
4089 | *sock_error = 1; | |
4090 | ret = LTTNG_ERR_SESSION_FAIL; | |
4091 | free(uris); | |
4092 | goto error; | |
4093 | } | |
4094 | ||
4095 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4096 | DBG("Creating session with ONE network URI is a bad call"); | |
4097 | ret = LTTNG_ERR_SESSION_FAIL; | |
4098 | free(uris); | |
4099 | goto error; | |
4100 | } | |
4101 | } | |
4102 | ||
4103 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4104 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4105 | free(uris); | |
4106 | break; | |
4107 | } | |
fb198a11 JG |
4108 | case LTTNG_SAVE_SESSION: |
4109 | { | |
4110 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4111 | &cmd_ctx->creds); | |
4112 | break; | |
4113 | } | |
d7ba1388 MD |
4114 | case LTTNG_SET_SESSION_SHM_PATH: |
4115 | { | |
4116 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4117 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4118 | break; | |
4119 | } | |
eded6438 | 4120 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4121 | { |
eded6438 | 4122 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4123 | break; |
4124 | } | |
c2561365 JD |
4125 | case LTTNG_REGENERATE_STATEDUMP: |
4126 | { | |
4127 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4128 | break; | |
4129 | } | |
b3530820 JG |
4130 | case LTTNG_REGISTER_TRIGGER: |
4131 | { | |
4132 | ret = cmd_register_trigger(cmd_ctx, sock, | |
4133 | notification_thread_handle); | |
4134 | break; | |
4135 | } | |
4136 | case LTTNG_UNREGISTER_TRIGGER: | |
4137 | { | |
4138 | ret = cmd_unregister_trigger(cmd_ctx, sock, | |
4139 | notification_thread_handle); | |
4140 | break; | |
4141 | } | |
5c408ad8 JD |
4142 | case LTTNG_ROTATE_SESSION: |
4143 | { | |
4144 | struct lttng_rotate_session_return rotate_return; | |
4145 | ||
4146 | DBG("Client rotate session \"%s\"", cmd_ctx->session->name); | |
4147 | ||
d68c9a04 | 4148 | memset(&rotate_return, 0, sizeof(rotate_return)); |
5c408ad8 JD |
4149 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { |
4150 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
4151 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4152 | goto error; | |
4153 | } | |
4154 | ||
4155 | ret = cmd_rotate_session(cmd_ctx->session, &rotate_return); | |
4156 | if (ret < 0) { | |
4157 | ret = -ret; | |
4158 | goto error; | |
4159 | } | |
4160 | ||
4161 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &rotate_return, | |
4162 | sizeof(rotate_return)); | |
4163 | if (ret < 0) { | |
4164 | ret = -ret; | |
4165 | goto error; | |
4166 | } | |
4167 | ||
4168 | ret = LTTNG_OK; | |
4169 | break; | |
4170 | } | |
d68c9a04 | 4171 | case LTTNG_ROTATION_GET_INFO: |
5c408ad8 | 4172 | { |
d68c9a04 | 4173 | struct lttng_rotation_get_info_return get_info_return; |
5c408ad8 | 4174 | |
d68c9a04 JD |
4175 | memset(&get_info_return, 0, sizeof(get_info_return)); |
4176 | ret = cmd_rotate_get_info(cmd_ctx->session, &get_info_return, | |
4177 | cmd_ctx->lsm->u.get_rotation_info.rotation_id); | |
5c408ad8 JD |
4178 | if (ret < 0) { |
4179 | ret = -ret; | |
4180 | goto error; | |
4181 | } | |
4182 | ||
d68c9a04 JD |
4183 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &get_info_return, |
4184 | sizeof(get_info_return)); | |
5c408ad8 JD |
4185 | if (ret < 0) { |
4186 | ret = -ret; | |
4187 | goto error; | |
4188 | } | |
4189 | ||
4190 | ret = LTTNG_OK; | |
4191 | break; | |
4192 | } | |
d68c9a04 | 4193 | case LTTNG_SESSION_GET_CURRENT_OUTPUT: |
5c408ad8 | 4194 | { |
d68c9a04 | 4195 | struct lttng_session_get_current_output_return output_return; |
5c408ad8 | 4196 | |
d68c9a04 JD |
4197 | memset(&output_return, 0, sizeof(output_return)); |
4198 | ret = cmd_session_get_current_output(cmd_ctx->session, | |
4199 | &output_return); | |
5c408ad8 JD |
4200 | if (ret < 0) { |
4201 | ret = -ret; | |
4202 | goto error; | |
4203 | } | |
4204 | ||
d68c9a04 JD |
4205 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &output_return, |
4206 | sizeof(output_return)); | |
5c408ad8 JD |
4207 | if (ret < 0) { |
4208 | ret = -ret; | |
4209 | goto error; | |
4210 | } | |
4211 | ||
4212 | ret = LTTNG_OK; | |
4213 | break; | |
4214 | } | |
259c2674 JD |
4215 | case LTTNG_ROTATION_SET_SCHEDULE: |
4216 | { | |
4217 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { | |
4218 | DBG("Kernel tracer version does not support session rotations"); | |
4219 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4220 | goto error; | |
4221 | } | |
4222 | ||
4223 | ret = cmd_rotation_set_schedule(cmd_ctx->session, | |
4224 | cmd_ctx->lsm->u.rotate_setup.timer_us, | |
90936dcf JD |
4225 | cmd_ctx->lsm->u.rotate_setup.size, |
4226 | notification_thread_handle); | |
a2026546 | 4227 | if (ret != LTTNG_OK) { |
259c2674 JD |
4228 | goto error; |
4229 | } | |
4230 | ||
259c2674 JD |
4231 | break; |
4232 | } | |
329f3443 JD |
4233 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
4234 | { | |
4235 | struct lttng_rotation_schedule_get_timer_period *get_timer; | |
4236 | ||
4237 | get_timer = zmalloc(sizeof(struct lttng_rotation_schedule_get_timer_period)); | |
4238 | if (!get_timer) { | |
4239 | ret = ENOMEM; | |
4240 | goto error; | |
4241 | } | |
4242 | get_timer->rotate_timer = cmd_ctx->session->rotate_timer_period; | |
4243 | ||
4244 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_timer, | |
4245 | sizeof(struct lttng_rotation_schedule_get_timer_period)); | |
4246 | free(get_timer); | |
4247 | if (ret < 0) { | |
4248 | ret = -ret; | |
4249 | goto error; | |
4250 | } | |
4251 | ||
4252 | ret = LTTNG_OK; | |
4253 | break; | |
4254 | } | |
4255 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
4256 | { | |
4257 | struct lttng_rotation_schedule_get_size *get_size; | |
4258 | ||
4259 | get_size = zmalloc(sizeof(struct lttng_rotation_schedule_get_size)); | |
4260 | if (!get_size) { | |
4261 | ret = ENOMEM; | |
4262 | goto error; | |
4263 | } | |
4264 | get_size->rotate_size = cmd_ctx->session->rotate_size; | |
4265 | ||
4266 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_size, | |
4267 | sizeof(struct lttng_rotation_schedule_get_size)); | |
4268 | free(get_size); | |
4269 | if (ret < 0) { | |
4270 | ret = -ret; | |
4271 | goto error; | |
4272 | } | |
4273 | ||
4274 | ret = LTTNG_OK; | |
4275 | break; | |
4276 | } | |
5e16da05 | 4277 | default: |
f73fabfd | 4278 | ret = LTTNG_ERR_UND; |
5461b305 | 4279 | break; |
fac6795d DG |
4280 | } |
4281 | ||
5461b305 | 4282 | error: |
5461b305 DG |
4283 | if (cmd_ctx->llm == NULL) { |
4284 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4285 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4286 | goto setup_error; |
4287 | } | |
4288 | } | |
54d01ffb | 4289 | /* Set return code */ |
5461b305 | 4290 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4291 | setup_error: |
b5541356 | 4292 | if (cmd_ctx->session) { |
54d01ffb | 4293 | session_unlock(cmd_ctx->session); |
b5541356 | 4294 | } |
256a5576 MD |
4295 | if (need_tracing_session) { |
4296 | session_unlock_list(); | |
4297 | } | |
54d01ffb | 4298 | init_setup_error: |
3745d315 | 4299 | assert(!rcu_read_ongoing()); |
8028d920 | 4300 | return ret; |
fac6795d DG |
4301 | } |
4302 | ||
44a5e5eb DG |
4303 | /* |
4304 | * Thread managing health check socket. | |
4305 | */ | |
4306 | static void *thread_manage_health(void *data) | |
4307 | { | |
eb4a2943 | 4308 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4309 | uint32_t revents, nb_fd; |
4310 | struct lttng_poll_event events; | |
0c89d795 MD |
4311 | struct health_comm_msg msg; |
4312 | struct health_comm_reply reply; | |
44a5e5eb DG |
4313 | |
4314 | DBG("[thread] Manage health check started"); | |
4315 | ||
4316 | rcu_register_thread(); | |
4317 | ||
6d737ce4 DG |
4318 | /* We might hit an error path before this is created. */ |
4319 | lttng_poll_init(&events); | |
3cc04881 | 4320 | |
44a5e5eb | 4321 | /* Create unix socket */ |
e6142f2e | 4322 | sock = lttcomm_create_unix_sock(config.health_unix_sock_path.value); |
44a5e5eb DG |
4323 | if (sock < 0) { |
4324 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4325 | goto error; |
4326 | } | |
4327 | ||
6c71277b MD |
4328 | if (is_root) { |
4329 | /* lttng health client socket path permissions */ | |
e6142f2e JG |
4330 | ret = chown(config.health_unix_sock_path.value, 0, |
4331 | utils_get_group_id(config.tracing_group_name.value)); | |
6c71277b | 4332 | if (ret < 0) { |
e6142f2e | 4333 | ERR("Unable to set group on %s", config.health_unix_sock_path.value); |
6c71277b | 4334 | PERROR("chown"); |
6c71277b MD |
4335 | goto error; |
4336 | } | |
4337 | ||
e6142f2e | 4338 | ret = chmod(config.health_unix_sock_path.value, |
6c71277b MD |
4339 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
4340 | if (ret < 0) { | |
e6142f2e | 4341 | ERR("Unable to set permissions on %s", config.health_unix_sock_path.value); |
6c71277b | 4342 | PERROR("chmod"); |
6c71277b MD |
4343 | goto error; |
4344 | } | |
4345 | } | |
4346 | ||
b662582b DG |
4347 | /* |
4348 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4349 | * show must go on. | |
4350 | */ | |
4351 | (void) utils_set_fd_cloexec(sock); | |
4352 | ||
44a5e5eb DG |
4353 | ret = lttcomm_listen_unix_sock(sock); |
4354 | if (ret < 0) { | |
4355 | goto error; | |
4356 | } | |
4357 | ||
4358 | /* | |
4359 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4360 | * more will be added to this poll set. | |
4361 | */ | |
d0b96690 | 4362 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4363 | if (ret < 0) { |
4364 | goto error; | |
4365 | } | |
4366 | ||
4367 | /* Add the application registration socket */ | |
4368 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4369 | if (ret < 0) { | |
4370 | goto error; | |
4371 | } | |
4372 | ||
ef367a93 | 4373 | sessiond_notify_ready(); |
97bc1426 | 4374 | |
44a5e5eb DG |
4375 | while (1) { |
4376 | DBG("Health check ready"); | |
4377 | ||
44a5e5eb DG |
4378 | /* Inifinite blocking call, waiting for transmission */ |
4379 | restart: | |
4380 | ret = lttng_poll_wait(&events, -1); | |
4381 | if (ret < 0) { | |
4382 | /* | |
4383 | * Restart interrupted system call. | |
4384 | */ | |
4385 | if (errno == EINTR) { | |
4386 | goto restart; | |
4387 | } | |
4388 | goto error; | |
4389 | } | |
4390 | ||
0d9c5d77 DG |
4391 | nb_fd = ret; |
4392 | ||
44a5e5eb DG |
4393 | for (i = 0; i < nb_fd; i++) { |
4394 | /* Fetch once the poll data */ | |
4395 | revents = LTTNG_POLL_GETEV(&events, i); | |
4396 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4397 | ||
fd20dac9 MD |
4398 | if (!revents) { |
4399 | /* No activity for this FD (poll implementation). */ | |
4400 | continue; | |
4401 | } | |
4402 | ||
44a5e5eb | 4403 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4404 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4405 | if (ret) { |
139ac872 MD |
4406 | err = 0; |
4407 | goto exit; | |
44a5e5eb DG |
4408 | } |
4409 | ||
4410 | /* Event on the registration socket */ | |
4411 | if (pollfd == sock) { | |
03e43155 MD |
4412 | if (revents & LPOLLIN) { |
4413 | continue; | |
4414 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4415 | ERR("Health socket poll error"); |
4416 | goto error; | |
03e43155 MD |
4417 | } else { |
4418 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4419 | goto error; | |
44a5e5eb DG |
4420 | } |
4421 | } | |
4422 | } | |
4423 | ||
4424 | new_sock = lttcomm_accept_unix_sock(sock); | |
4425 | if (new_sock < 0) { | |
4426 | goto error; | |
4427 | } | |
4428 | ||
b662582b DG |
4429 | /* |
4430 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4431 | * show must go on. | |
4432 | */ | |
4433 | (void) utils_set_fd_cloexec(new_sock); | |
4434 | ||
44a5e5eb DG |
4435 | DBG("Receiving data from client for health..."); |
4436 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4437 | if (ret <= 0) { | |
4438 | DBG("Nothing recv() from client... continuing"); | |
4439 | ret = close(new_sock); | |
4440 | if (ret) { | |
4441 | PERROR("close"); | |
4442 | } | |
44a5e5eb DG |
4443 | continue; |
4444 | } | |
4445 | ||
4446 | rcu_thread_online(); | |
4447 | ||
53efb85a | 4448 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4449 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4450 | /* | |
4451 | * health_check_state returns 0 if health is | |
4452 | * bad. | |
4453 | */ | |
4454 | if (!health_check_state(health_sessiond, i)) { | |
4455 | reply.ret_code |= 1ULL << i; | |
4456 | } | |
44a5e5eb DG |
4457 | } |
4458 | ||
6c71277b | 4459 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4460 | |
4461 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4462 | if (ret < 0) { | |
4463 | ERR("Failed to send health data back to client"); | |
4464 | } | |
4465 | ||
4466 | /* End of transmission */ | |
4467 | ret = close(new_sock); | |
4468 | if (ret) { | |
4469 | PERROR("close"); | |
4470 | } | |
44a5e5eb DG |
4471 | } |
4472 | ||
139ac872 | 4473 | exit: |
44a5e5eb | 4474 | error: |
139ac872 MD |
4475 | if (err) { |
4476 | ERR("Health error occurred in %s", __func__); | |
4477 | } | |
44a5e5eb | 4478 | DBG("Health check thread dying"); |
e6142f2e | 4479 | unlink(config.health_unix_sock_path.value); |
44a5e5eb DG |
4480 | if (sock >= 0) { |
4481 | ret = close(sock); | |
4482 | if (ret) { | |
4483 | PERROR("close"); | |
4484 | } | |
4485 | } | |
44a5e5eb DG |
4486 | |
4487 | lttng_poll_clean(&events); | |
b11d6a7f | 4488 | stop_threads(); |
44a5e5eb DG |
4489 | rcu_unregister_thread(); |
4490 | return NULL; | |
4491 | } | |
4492 | ||
1d4b027a | 4493 | /* |
d063d709 DG |
4494 | * This thread manage all clients request using the unix client socket for |
4495 | * communication. | |
1d4b027a DG |
4496 | */ |
4497 | static void *thread_manage_clients(void *data) | |
4498 | { | |
139ac872 | 4499 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4500 | int sock_error; |
5eb91c98 | 4501 | uint32_t revents, nb_fd; |
273ea72c | 4502 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4503 | struct lttng_poll_event events; |
1d4b027a DG |
4504 | |
4505 | DBG("[thread] Manage client started"); | |
4506 | ||
f6a9efaa DG |
4507 | rcu_register_thread(); |
4508 | ||
6c71277b | 4509 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4510 | |
840cb59c | 4511 | health_code_update(); |
44a5e5eb | 4512 | |
1d4b027a DG |
4513 | ret = lttcomm_listen_unix_sock(client_sock); |
4514 | if (ret < 0) { | |
35df2755 | 4515 | goto error_listen; |
1d4b027a DG |
4516 | } |
4517 | ||
5eb91c98 DG |
4518 | /* |
4519 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4520 | * more will be added to this poll set. | |
4521 | */ | |
d0b96690 | 4522 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4523 | if (ret < 0) { |
35df2755 | 4524 | goto error_create_poll; |
5eb91c98 | 4525 | } |
273ea72c | 4526 | |
5eb91c98 DG |
4527 | /* Add the application registration socket */ |
4528 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4529 | if (ret < 0) { | |
4530 | goto error; | |
4531 | } | |
273ea72c | 4532 | |
ef367a93 JG |
4533 | ret = sem_post(&load_info->message_thread_ready); |
4534 | if (ret) { | |
4535 | PERROR("sem_post message_thread_ready"); | |
4536 | goto error; | |
4537 | } | |
0bb7724a | 4538 | |
f28f9e44 JG |
4539 | /* |
4540 | * Wait until all support threads are initialized before accepting | |
4541 | * commands. | |
4542 | */ | |
4543 | while (uatomic_read(<tng_sessiond_ready) != 0) { | |
4544 | fd_set read_fds; | |
4545 | struct timeval timeout; | |
4546 | ||
4547 | FD_ZERO(&read_fds); | |
4548 | FD_SET(thread_quit_pipe[0], &read_fds); | |
4549 | memset(&timeout, 0, sizeof(timeout)); | |
4550 | timeout.tv_usec = 1000; | |
4551 | ||
4552 | /* | |
4553 | * If a support thread failed to launch, it may signal that | |
4554 | * we must exit and the sessiond would never be marked as | |
4555 | * "ready". | |
4556 | * | |
4557 | * The timeout is set to 1ms, which serves as a way to | |
4558 | * pace down this check. | |
4559 | */ | |
4560 | ret = select(thread_quit_pipe[0] + 1, &read_fds, NULL, NULL, | |
4561 | &timeout); | |
4562 | if (ret > 0 || (ret < 0 && errno != EINTR)) { | |
4563 | goto exit; | |
4564 | } | |
9cc1ba3b | 4565 | cmm_smp_rmb(); |
f28f9e44 JG |
4566 | } |
4567 | ||
72453c8c MD |
4568 | /* This testpoint is after we signal readiness to the parent. */ |
4569 | if (testpoint(sessiond_thread_manage_clients)) { | |
4570 | goto error; | |
4571 | } | |
4572 | ||
e547b070 | 4573 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4574 | goto error; |
4575 | } | |
8ac94142 | 4576 | |
840cb59c | 4577 | health_code_update(); |
44a5e5eb | 4578 | |
1d4b027a | 4579 | while (1) { |
1d4b027a | 4580 | DBG("Accepting client command ..."); |
273ea72c DG |
4581 | |
4582 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4583 | restart: |
a78af745 | 4584 | health_poll_entry(); |
5eb91c98 | 4585 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4586 | health_poll_exit(); |
273ea72c | 4587 | if (ret < 0) { |
88f2b785 MD |
4588 | /* |
4589 | * Restart interrupted system call. | |
4590 | */ | |
4591 | if (errno == EINTR) { | |
4592 | goto restart; | |
4593 | } | |
273ea72c DG |
4594 | goto error; |
4595 | } | |
4596 | ||
0d9c5d77 DG |
4597 | nb_fd = ret; |
4598 | ||
5eb91c98 DG |
4599 | for (i = 0; i < nb_fd; i++) { |
4600 | /* Fetch once the poll data */ | |
4601 | revents = LTTNG_POLL_GETEV(&events, i); | |
4602 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4603 | ||
840cb59c | 4604 | health_code_update(); |
44a5e5eb | 4605 | |
fd20dac9 MD |
4606 | if (!revents) { |
4607 | /* No activity for this FD (poll implementation). */ | |
4608 | continue; | |
4609 | } | |
4610 | ||
5eb91c98 | 4611 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4612 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4613 | if (ret) { |
139ac872 MD |
4614 | err = 0; |
4615 | goto exit; | |
5eb91c98 DG |
4616 | } |
4617 | ||
4618 | /* Event on the registration socket */ | |
4619 | if (pollfd == client_sock) { | |
03e43155 MD |
4620 | if (revents & LPOLLIN) { |
4621 | continue; | |
4622 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4623 | ERR("Client socket poll error"); |
4624 | goto error; | |
03e43155 MD |
4625 | } else { |
4626 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4627 | goto error; | |
5eb91c98 DG |
4628 | } |
4629 | } | |
4630 | } | |
4631 | ||
4632 | DBG("Wait for client response"); | |
4633 | ||
840cb59c | 4634 | health_code_update(); |
44a5e5eb | 4635 | |
5eb91c98 DG |
4636 | sock = lttcomm_accept_unix_sock(client_sock); |
4637 | if (sock < 0) { | |
273ea72c | 4638 | goto error; |
273ea72c DG |
4639 | } |
4640 | ||
b662582b DG |
4641 | /* |
4642 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4643 | * show must go on. | |
4644 | */ | |
4645 | (void) utils_set_fd_cloexec(sock); | |
4646 | ||
be040666 DG |
4647 | /* Set socket option for credentials retrieval */ |
4648 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4649 | if (ret < 0) { | |
4650 | goto error; | |
4651 | } | |
4652 | ||
5eb91c98 | 4653 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4654 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4655 | if (cmd_ctx == NULL) { |
76d7553f | 4656 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4657 | goto error; |
5eb91c98 | 4658 | } |
1d4b027a | 4659 | |
5eb91c98 | 4660 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4661 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4662 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4663 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4664 | goto error; |
4665 | } | |
1d4b027a | 4666 | |
5eb91c98 DG |
4667 | cmd_ctx->llm = NULL; |
4668 | cmd_ctx->session = NULL; | |
1d4b027a | 4669 | |
840cb59c | 4670 | health_code_update(); |
44a5e5eb | 4671 | |
5eb91c98 DG |
4672 | /* |
4673 | * Data is received from the lttng client. The struct | |
4674 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4675 | * the client. | |
4676 | */ | |
4677 | DBG("Receiving data from client ..."); | |
be040666 DG |
4678 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4679 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4680 | if (ret <= 0) { |
4681 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4682 | ret = close(sock); |
4683 | if (ret) { | |
4684 | PERROR("close"); | |
4685 | } | |
4686 | sock = -1; | |
a2c0da86 | 4687 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4688 | continue; |
4689 | } | |
1d4b027a | 4690 | |
840cb59c | 4691 | health_code_update(); |
44a5e5eb | 4692 | |
5eb91c98 DG |
4693 | // TODO: Validate cmd_ctx including sanity check for |
4694 | // security purpose. | |
f7776ea7 | 4695 | |
f6a9efaa | 4696 | rcu_thread_online(); |
5eb91c98 DG |
4697 | /* |
4698 | * This function dispatch the work to the kernel or userspace tracer | |
4699 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4700 | * informations for the client. The command context struct contains | |
4701 | * everything this function may needs. | |
4702 | */ | |
53a80697 | 4703 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4704 | rcu_thread_offline(); |
5eb91c98 | 4705 | if (ret < 0) { |
36134aa1 DG |
4706 | ret = close(sock); |
4707 | if (ret) { | |
4708 | PERROR("close"); | |
53a80697 | 4709 | } |
36134aa1 | 4710 | sock = -1; |
bbd973c2 | 4711 | /* |
5eb91c98 | 4712 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4713 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4714 | * (ENOMEM). Error detected but still accept |
4715 | * command, unless a socket error has been | |
4716 | * detected. | |
bbd973c2 | 4717 | */ |
bbd973c2 | 4718 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4719 | continue; |
4720 | } | |
d6e4fca4 | 4721 | |
840cb59c | 4722 | health_code_update(); |
44a5e5eb | 4723 | |
a1ac8b97 | 4724 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4725 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4726 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4727 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4728 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4729 | if (ret < 0) { |
4730 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4731 | } |
1d4b027a | 4732 | |
5eb91c98 | 4733 | /* End of transmission */ |
76d7553f MD |
4734 | ret = close(sock); |
4735 | if (ret) { | |
4736 | PERROR("close"); | |
4737 | } | |
4738 | sock = -1; | |
be040666 DG |
4739 | |
4740 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4741 | |
840cb59c | 4742 | health_code_update(); |
273ea72c DG |
4743 | } |
4744 | ||
139ac872 | 4745 | exit: |
5eb91c98 | 4746 | error: |
35df2755 CB |
4747 | if (sock >= 0) { |
4748 | ret = close(sock); | |
4749 | if (ret) { | |
4750 | PERROR("close"); | |
4751 | } | |
139ac872 | 4752 | } |
44a5e5eb | 4753 | |
35df2755 CB |
4754 | lttng_poll_clean(&events); |
4755 | clean_command_ctx(&cmd_ctx); | |
4756 | ||
4757 | error_listen: | |
4758 | error_create_poll: | |
e6142f2e | 4759 | unlink(config.client_unix_sock_path.value); |
76d7553f MD |
4760 | if (client_sock >= 0) { |
4761 | ret = close(client_sock); | |
4762 | if (ret) { | |
4763 | PERROR("close"); | |
4764 | } | |
a4b35e07 | 4765 | } |
35df2755 CB |
4766 | |
4767 | if (err) { | |
840cb59c | 4768 | health_error(); |
35df2755 | 4769 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4770 | } |
273ea72c | 4771 | |
8782cc74 | 4772 | health_unregister(health_sessiond); |
35df2755 CB |
4773 | |
4774 | DBG("Client thread dying"); | |
f6a9efaa DG |
4775 | |
4776 | rcu_unregister_thread(); | |
4a15001e MD |
4777 | |
4778 | /* | |
4779 | * Since we are creating the consumer threads, we own them, so we need | |
4780 | * to join them before our thread exits. | |
4781 | */ | |
4782 | ret = join_consumer_thread(&kconsumer_data); | |
4783 | if (ret) { | |
4784 | errno = ret; | |
4785 | PERROR("join_consumer"); | |
4786 | } | |
4787 | ||
4788 | ret = join_consumer_thread(&ustconsumer32_data); | |
4789 | if (ret) { | |
4790 | errno = ret; | |
4791 | PERROR("join_consumer ust32"); | |
4792 | } | |
4793 | ||
4794 | ret = join_consumer_thread(&ustconsumer64_data); | |
4795 | if (ret) { | |
4796 | errno = ret; | |
4797 | PERROR("join_consumer ust64"); | |
4798 | } | |
1d4b027a DG |
4799 | return NULL; |
4800 | } | |
4801 | ||
c0232ea5 JG |
4802 | static int string_match(const char *str1, const char *str2) |
4803 | { | |
4804 | return (str1 && str2) && !strcmp(str1, str2); | |
4805 | } | |
4806 | ||
fac6795d | 4807 | /* |
26296c48 JG |
4808 | * Take an option from the getopt output and set it in the right variable to be |
4809 | * used later. | |
4810 | * | |
4811 | * Return 0 on success else a negative value. | |
fac6795d | 4812 | */ |
26296c48 | 4813 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4814 | { |
26296c48 | 4815 | int ret = 0; |
fac6795d | 4816 | |
c0232ea5 | 4817 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4818 | if (!arg || *arg == '\0') { |
4819 | ret = -EINVAL; | |
4820 | goto end; | |
4821 | } | |
e8fa9fb0 MD |
4822 | if (lttng_is_setuid_setgid()) { |
4823 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4824 | "-c, --client-sock"); | |
4825 | } else { | |
e6142f2e JG |
4826 | config_string_set(&config.client_unix_sock_path, |
4827 | strdup(arg)); | |
4828 | if (!config.client_unix_sock_path.value) { | |
4829 | ret = -ENOMEM; | |
4830 | PERROR("strdup"); | |
4831 | } | |
e8fa9fb0 | 4832 | } |
c0232ea5 | 4833 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4834 | if (!arg || *arg == '\0') { |
4835 | ret = -EINVAL; | |
4836 | goto end; | |
4837 | } | |
e8fa9fb0 MD |
4838 | if (lttng_is_setuid_setgid()) { |
4839 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4840 | "-a, --apps-sock"); | |
4841 | } else { | |
e6142f2e JG |
4842 | config_string_set(&config.apps_unix_sock_path, |
4843 | strdup(arg)); | |
4844 | if (!config.apps_unix_sock_path.value) { | |
4845 | ret = -ENOMEM; | |
4846 | PERROR("strdup"); | |
4847 | } | |
e8fa9fb0 | 4848 | } |
c0232ea5 | 4849 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 4850 | config.daemonize = true; |
c0232ea5 | 4851 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 4852 | config.background = true; |
c0232ea5 | 4853 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4854 | if (!arg || *arg == '\0') { |
4855 | ret = -EINVAL; | |
4856 | goto end; | |
4857 | } | |
e8fa9fb0 MD |
4858 | if (lttng_is_setuid_setgid()) { |
4859 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4860 | "-g, --group"); | |
4861 | } else { | |
e6142f2e JG |
4862 | config_string_set(&config.tracing_group_name, |
4863 | strdup(arg)); | |
4864 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 4865 | ret = -ENOMEM; |
e6142f2e | 4866 | PERROR("strdup"); |
e8fa9fb0 | 4867 | } |
db322c4d | 4868 | } |
c0232ea5 | 4869 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 4870 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 4871 | if (ret) { |
4fc83d94 | 4872 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
4873 | perror("exec"); |
4874 | } | |
4875 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 4876 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4877 | fprintf(stdout, "%s\n", VERSION); |
4878 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4879 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 4880 | config.sig_parent = true; |
c0232ea5 | 4881 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
4882 | if (!arg || *arg == '\0') { |
4883 | ret = -EINVAL; | |
4884 | goto end; | |
4885 | } | |
e8fa9fb0 MD |
4886 | if (lttng_is_setuid_setgid()) { |
4887 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4888 | "--kconsumerd-err-sock"); | |
4889 | } else { | |
e6142f2e JG |
4890 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
4891 | strdup(arg)); | |
4892 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
4893 | ret = -ENOMEM; | |
4894 | PERROR("strdup"); | |
4895 | } | |
e8fa9fb0 | 4896 | } |
c0232ea5 | 4897 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
4898 | if (!arg || *arg == '\0') { |
4899 | ret = -EINVAL; | |
4900 | goto end; | |
4901 | } | |
e8fa9fb0 MD |
4902 | if (lttng_is_setuid_setgid()) { |
4903 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4904 | "--kconsumerd-cmd-sock"); | |
4905 | } else { | |
e6142f2e JG |
4906 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
4907 | strdup(arg)); | |
4908 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
4909 | ret = -ENOMEM; | |
4910 | PERROR("strdup"); | |
4911 | } | |
e8fa9fb0 | 4912 | } |
c0232ea5 | 4913 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
4914 | if (!arg || *arg == '\0') { |
4915 | ret = -EINVAL; | |
4916 | goto end; | |
4917 | } | |
e8fa9fb0 MD |
4918 | if (lttng_is_setuid_setgid()) { |
4919 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4920 | "--ustconsumerd64-err-sock"); | |
4921 | } else { | |
e6142f2e JG |
4922 | config_string_set(&config.consumerd64_err_unix_sock_path, |
4923 | strdup(arg)); | |
4924 | if (!config.consumerd64_err_unix_sock_path.value) { | |
4925 | ret = -ENOMEM; | |
4926 | PERROR("strdup"); | |
4927 | } | |
e8fa9fb0 | 4928 | } |
c0232ea5 | 4929 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
4930 | if (!arg || *arg == '\0') { |
4931 | ret = -EINVAL; | |
4932 | goto end; | |
4933 | } | |
e8fa9fb0 MD |
4934 | if (lttng_is_setuid_setgid()) { |
4935 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4936 | "--ustconsumerd64-cmd-sock"); | |
4937 | } else { | |
e6142f2e JG |
4938 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
4939 | strdup(arg)); | |
4940 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
4941 | ret = -ENOMEM; | |
4942 | PERROR("strdup"); | |
4943 | } | |
e8fa9fb0 | 4944 | } |
c0232ea5 | 4945 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
4946 | if (!arg || *arg == '\0') { |
4947 | ret = -EINVAL; | |
4948 | goto end; | |
4949 | } | |
e8fa9fb0 MD |
4950 | if (lttng_is_setuid_setgid()) { |
4951 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4952 | "--ustconsumerd32-err-sock"); | |
4953 | } else { | |
e6142f2e JG |
4954 | config_string_set(&config.consumerd32_err_unix_sock_path, |
4955 | strdup(arg)); | |
4956 | if (!config.consumerd32_err_unix_sock_path.value) { | |
4957 | ret = -ENOMEM; | |
4958 | PERROR("strdup"); | |
4959 | } | |
e8fa9fb0 | 4960 | } |
c0232ea5 | 4961 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
4962 | if (!arg || *arg == '\0') { |
4963 | ret = -EINVAL; | |
4964 | goto end; | |
4965 | } | |
e8fa9fb0 MD |
4966 | if (lttng_is_setuid_setgid()) { |
4967 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4968 | "--ustconsumerd32-cmd-sock"); | |
4969 | } else { | |
e6142f2e JG |
4970 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
4971 | strdup(arg)); | |
4972 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
4973 | ret = -ENOMEM; | |
4974 | PERROR("strdup"); | |
4975 | } | |
e8fa9fb0 | 4976 | } |
c0232ea5 | 4977 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 4978 | config.no_kernel = true; |
c0232ea5 | 4979 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 4980 | config.quiet = true; |
c0232ea5 | 4981 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4982 | /* Verbose level can increase using multiple -v */ |
4983 | if (arg) { | |
13755a18 | 4984 | /* Value obtained from config file */ |
e6142f2e | 4985 | config.verbose = config_parse_value(arg); |
26296c48 | 4986 | } else { |
13755a18 | 4987 | /* -v used on command line */ |
e6142f2e | 4988 | config.verbose++; |
26296c48 | 4989 | } |
13755a18 | 4990 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
4991 | config.verbose = config.verbose < 0 ? 0 : |
4992 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 4993 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 4994 | if (arg) { |
e6142f2e | 4995 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 4996 | } else { |
e6142f2e | 4997 | config.verbose_consumer++; |
26296c48 | 4998 | } |
c0232ea5 | 4999 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
5000 | if (!arg || *arg == '\0') { |
5001 | ret = -EINVAL; | |
5002 | goto end; | |
5003 | } | |
e8fa9fb0 MD |
5004 | if (lttng_is_setuid_setgid()) { |
5005 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5006 | "--consumerd32-path"); | |
5007 | } else { | |
e6142f2e JG |
5008 | config_string_set(&config.consumerd32_bin_path, |
5009 | strdup(arg)); | |
5010 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
5011 | PERROR("strdup"); |
5012 | ret = -ENOMEM; | |
5013 | } | |
db322c4d | 5014 | } |
c0232ea5 | 5015 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
5016 | if (!arg || *arg == '\0') { |
5017 | ret = -EINVAL; | |
5018 | goto end; | |
5019 | } | |
e8fa9fb0 MD |
5020 | if (lttng_is_setuid_setgid()) { |
5021 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5022 | "--consumerd32-libdir"); | |
5023 | } else { | |
e6142f2e JG |
5024 | config_string_set(&config.consumerd32_lib_dir, |
5025 | strdup(arg)); | |
5026 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
5027 | PERROR("strdup"); |
5028 | ret = -ENOMEM; | |
5029 | } | |
db322c4d | 5030 | } |
c0232ea5 | 5031 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
5032 | if (!arg || *arg == '\0') { |
5033 | ret = -EINVAL; | |
5034 | goto end; | |
5035 | } | |
e8fa9fb0 MD |
5036 | if (lttng_is_setuid_setgid()) { |
5037 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5038 | "--consumerd64-path"); | |
5039 | } else { | |
e6142f2e JG |
5040 | config_string_set(&config.consumerd64_bin_path, |
5041 | strdup(arg)); | |
5042 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
5043 | PERROR("strdup"); |
5044 | ret = -ENOMEM; | |
5045 | } | |
db322c4d | 5046 | } |
c0232ea5 | 5047 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
5048 | if (!arg || *arg == '\0') { |
5049 | ret = -EINVAL; | |
5050 | goto end; | |
5051 | } | |
e8fa9fb0 MD |
5052 | if (lttng_is_setuid_setgid()) { |
5053 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5054 | "--consumerd64-libdir"); | |
5055 | } else { | |
e6142f2e JG |
5056 | config_string_set(&config.consumerd64_lib_dir, |
5057 | strdup(arg)); | |
5058 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
5059 | PERROR("strdup"); |
5060 | ret = -ENOMEM; | |
5061 | } | |
db322c4d | 5062 | } |
c0232ea5 | 5063 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
5064 | if (!arg || *arg == '\0') { |
5065 | ret = -EINVAL; | |
5066 | goto end; | |
5067 | } | |
e8fa9fb0 MD |
5068 | if (lttng_is_setuid_setgid()) { |
5069 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5070 | "-p, --pidfile"); | |
5071 | } else { | |
e6142f2e JG |
5072 | config_string_set(&config.pid_file_path, strdup(arg)); |
5073 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
5074 | PERROR("strdup"); |
5075 | ret = -ENOMEM; | |
5076 | } | |
db322c4d | 5077 | } |
c0232ea5 | 5078 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
5079 | if (!arg || *arg == '\0') { |
5080 | ret = -EINVAL; | |
5081 | goto end; | |
5082 | } | |
e8fa9fb0 MD |
5083 | if (lttng_is_setuid_setgid()) { |
5084 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5085 | "--agent-tcp-port"); | |
5086 | } else { | |
5087 | unsigned long v; | |
4d076222 | 5088 | |
e8fa9fb0 MD |
5089 | errno = 0; |
5090 | v = strtoul(arg, NULL, 0); | |
5091 | if (errno != 0 || !isdigit(arg[0])) { | |
5092 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
5093 | return -1; | |
5094 | } | |
5095 | if (v == 0 || v >= 65535) { | |
5096 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
5097 | return -1; | |
5098 | } | |
2288467f JG |
5099 | config.agent_tcp_port.begin = config.agent_tcp_port.end = (int) v; |
5100 | DBG3("Agent TCP port set to non default: %i", (int) v); | |
26296c48 | 5101 | } |
c0232ea5 | 5102 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
5103 | if (!arg || *arg == '\0') { |
5104 | ret = -EINVAL; | |
5105 | goto end; | |
5106 | } | |
e8fa9fb0 MD |
5107 | if (lttng_is_setuid_setgid()) { |
5108 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5109 | "-l, --load"); | |
5110 | } else { | |
e6142f2e JG |
5111 | config_string_set(&config.load_session_path, strdup(arg)); |
5112 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
5113 | PERROR("strdup"); |
5114 | ret = -ENOMEM; | |
5115 | } | |
ef367a93 | 5116 | } |
c0232ea5 | 5117 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
5118 | if (!arg || *arg == '\0') { |
5119 | ret = -EINVAL; | |
5120 | goto end; | |
5121 | } | |
e8fa9fb0 MD |
5122 | if (lttng_is_setuid_setgid()) { |
5123 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5124 | "--kmod-probes"); | |
5125 | } else { | |
e6142f2e JG |
5126 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
5127 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
5128 | PERROR("strdup"); |
5129 | ret = -ENOMEM; | |
5130 | } | |
c9d42407 | 5131 | } |
c0232ea5 | 5132 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
5133 | if (!arg || *arg == '\0') { |
5134 | ret = -EINVAL; | |
5135 | goto end; | |
5136 | } | |
e8fa9fb0 MD |
5137 | if (lttng_is_setuid_setgid()) { |
5138 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5139 | "--extra-kmod-probes"); | |
5140 | } else { | |
e6142f2e JG |
5141 | config_string_set(&config.kmod_extra_probes_list, |
5142 | strdup(arg)); | |
5143 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
5144 | PERROR("strdup"); |
5145 | ret = -ENOMEM; | |
5146 | } | |
db322c4d | 5147 | } |
c0232ea5 JG |
5148 | } else if (string_match(optname, "config") || opt == 'f') { |
5149 | /* This is handled in set_options() thus silent skip. */ | |
5150 | goto end; | |
5151 | } else { | |
26296c48 JG |
5152 | /* Unknown option or other error. |
5153 | * Error is printed by getopt, just return */ | |
5154 | ret = -1; | |
5155 | } | |
5156 | ||
f3dd7ce7 | 5157 | end: |
c5d350b2 JG |
5158 | if (ret == -EINVAL) { |
5159 | const char *opt_name = "unknown"; | |
5160 | int i; | |
5161 | ||
5162 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
5163 | i++) { | |
5164 | if (opt == long_options[i].val) { | |
5165 | opt_name = long_options[i].name; | |
5166 | break; | |
5167 | } | |
5168 | } | |
5169 | ||
5170 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
5171 | opt_name); | |
5172 | } | |
f3dd7ce7 | 5173 | |
26296c48 JG |
5174 | return ret; |
5175 | } | |
5176 | ||
5177 | /* | |
5178 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 5179 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
5180 | * return value conventions. |
5181 | */ | |
5182 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
5183 | { | |
5184 | int ret = 0, i; | |
5185 | ||
5186 | if (!entry || !entry->name || !entry->value) { | |
5187 | ret = -EINVAL; | |
5188 | goto end; | |
5189 | } | |
5190 | ||
5191 | /* Check if the option is to be ignored */ | |
5192 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
5193 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
5194 | goto end; | |
5195 | } | |
5196 | } | |
5197 | ||
5198 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
5199 | i++) { | |
5200 | ||
5201 | /* Ignore if not fully matched. */ | |
5202 | if (strcmp(entry->name, long_options[i].name)) { | |
5203 | continue; | |
5204 | } | |
5205 | ||
5206 | /* | |
5207 | * If the option takes no argument on the command line, we have to | |
5208 | * check if the value is "true". We support non-zero numeric values, | |
5209 | * true, on and yes. | |
5210 | */ | |
5211 | if (!long_options[i].has_arg) { | |
5212 | ret = config_parse_value(entry->value); | |
5213 | if (ret <= 0) { | |
5214 | if (ret) { | |
5215 | WARN("Invalid configuration value \"%s\" for option %s", | |
5216 | entry->value, entry->name); | |
5217 | } | |
5218 | /* False, skip boolean config option. */ | |
5219 | goto end; | |
4d076222 | 5220 | } |
26296c48 JG |
5221 | } |
5222 | ||
5223 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
5224 | goto end; | |
5225 | } | |
5226 | ||
5227 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5228 | ||
5229 | end: | |
5230 | return ret; | |
5231 | } | |
5232 | ||
5233 | /* | |
5234 | * daemon configuration loading and argument parsing | |
5235 | */ | |
5236 | static int set_options(int argc, char **argv) | |
5237 | { | |
5238 | int ret = 0, c = 0, option_index = 0; | |
5239 | int orig_optopt = optopt, orig_optind = optind; | |
5240 | char *optstring; | |
5241 | const char *config_path = NULL; | |
5242 | ||
5243 | optstring = utils_generate_optstring(long_options, | |
5244 | sizeof(long_options) / sizeof(struct option)); | |
5245 | if (!optstring) { | |
5246 | ret = -ENOMEM; | |
5247 | goto end; | |
5248 | } | |
5249 | ||
5250 | /* Check for the --config option */ | |
5251 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5252 | &option_index)) != -1) { | |
5253 | if (c == '?') { | |
5254 | ret = -EINVAL; | |
5255 | goto end; | |
5256 | } else if (c != 'f') { | |
5257 | /* if not equal to --config option. */ | |
5258 | continue; | |
5259 | } | |
5260 | ||
e8fa9fb0 MD |
5261 | if (lttng_is_setuid_setgid()) { |
5262 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5263 | "-f, --config"); | |
5264 | } else { | |
5265 | config_path = utils_expand_path(optarg); | |
5266 | if (!config_path) { | |
5267 | ERR("Failed to resolve path: %s", optarg); | |
5268 | } | |
26296c48 JG |
5269 | } |
5270 | } | |
5271 | ||
5272 | ret = config_get_section_entries(config_path, config_section_name, | |
5273 | config_entry_handler, NULL); | |
5274 | if (ret) { | |
5275 | if (ret > 0) { | |
5276 | ERR("Invalid configuration option at line %i", ret); | |
5277 | ret = -1; | |
5278 | } | |
5279 | goto end; | |
5280 | } | |
5281 | ||
5282 | /* Reset getopt's global state */ | |
5283 | optopt = orig_optopt; | |
5284 | optind = orig_optind; | |
5285 | while (1) { | |
c0232ea5 JG |
5286 | option_index = -1; |
5287 | /* | |
5288 | * getopt_long() will not set option_index if it encounters a | |
5289 | * short option. | |
5290 | */ | |
5291 | c = getopt_long(argc, argv, optstring, long_options, | |
5292 | &option_index); | |
26296c48 | 5293 | if (c == -1) { |
4d076222 DG |
5294 | break; |
5295 | } | |
26296c48 | 5296 | |
c0232ea5 JG |
5297 | /* |
5298 | * Pass NULL as the long option name if popt left the index | |
5299 | * unset. | |
5300 | */ | |
5301 | ret = set_option(c, optarg, | |
5302 | option_index < 0 ? NULL : | |
5303 | long_options[option_index].name); | |
26296c48 JG |
5304 | if (ret < 0) { |
5305 | break; | |
fac6795d DG |
5306 | } |
5307 | } | |
5308 | ||
26296c48 JG |
5309 | end: |
5310 | free(optstring); | |
5311 | return ret; | |
fac6795d DG |
5312 | } |
5313 | ||
5314 | /* | |
d063d709 | 5315 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5316 | * apps_sock - The communication socket for all UST apps. |
5317 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5318 | */ |
cf3af59e | 5319 | static int init_daemon_socket(void) |
fac6795d DG |
5320 | { |
5321 | int ret = 0; | |
5322 | mode_t old_umask; | |
5323 | ||
5324 | old_umask = umask(0); | |
5325 | ||
5326 | /* Create client tool unix socket */ | |
e6142f2e | 5327 | client_sock = lttcomm_create_unix_sock(config.client_unix_sock_path.value); |
d6f42150 | 5328 | if (client_sock < 0) { |
e6142f2e | 5329 | ERR("Create unix sock failed: %s", config.client_unix_sock_path.value); |
fac6795d DG |
5330 | ret = -1; |
5331 | goto end; | |
5332 | } | |
5333 | ||
b662582b DG |
5334 | /* Set the cloexec flag */ |
5335 | ret = utils_set_fd_cloexec(client_sock); | |
5336 | if (ret < 0) { | |
5337 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5338 | "Continuing but note that the consumer daemon will have a " | |
5339 | "reference to this socket on exec()", client_sock); | |
5340 | } | |
5341 | ||
fac6795d | 5342 | /* File permission MUST be 660 */ |
e6142f2e | 5343 | ret = chmod(config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
fac6795d | 5344 | if (ret < 0) { |
e6142f2e | 5345 | ERR("Set file permissions failed: %s", config.client_unix_sock_path.value); |
76d7553f | 5346 | PERROR("chmod"); |
fac6795d DG |
5347 | goto end; |
5348 | } | |
5349 | ||
5350 | /* Create the application unix socket */ | |
e6142f2e | 5351 | apps_sock = lttcomm_create_unix_sock(config.apps_unix_sock_path.value); |
d6f42150 | 5352 | if (apps_sock < 0) { |
e6142f2e | 5353 | ERR("Create unix sock failed: %s", config.apps_unix_sock_path.value); |
fac6795d DG |
5354 | ret = -1; |
5355 | goto end; | |
5356 | } | |
5357 | ||
b662582b DG |
5358 | /* Set the cloexec flag */ |
5359 | ret = utils_set_fd_cloexec(apps_sock); | |
5360 | if (ret < 0) { | |
5361 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5362 | "Continuing but note that the consumer daemon will have a " | |
5363 | "reference to this socket on exec()", apps_sock); | |
5364 | } | |
5365 | ||
d6f42150 | 5366 | /* File permission MUST be 666 */ |
e6142f2e | 5367 | ret = chmod(config.apps_unix_sock_path.value, |
54d01ffb | 5368 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
fac6795d | 5369 | if (ret < 0) { |
e6142f2e | 5370 | ERR("Set file permissions failed: %s", config.apps_unix_sock_path.value); |
76d7553f | 5371 | PERROR("chmod"); |
fac6795d DG |
5372 | goto end; |
5373 | } | |
5374 | ||
b662582b DG |
5375 | DBG3("Session daemon client socket %d and application socket %d created", |
5376 | client_sock, apps_sock); | |
5377 | ||
fac6795d DG |
5378 | end: |
5379 | umask(old_umask); | |
5380 | return ret; | |
5381 | } | |
5382 | ||
f472090a JG |
5383 | /* |
5384 | * Create lockfile using the rundir and return its fd. | |
5385 | */ | |
5386 | static int create_lockfile(void) | |
5387 | { | |
5388 | return utils_create_lock_file(config.lock_file_path.value); | |
5389 | } | |
5390 | ||
fac6795d | 5391 | /* |
54d01ffb DG |
5392 | * Check if the global socket is available, and if a daemon is answering at the |
5393 | * other side. If yes, error is returned. | |
f472090a JG |
5394 | * |
5395 | * Also attempts to create and hold the lock file. | |
fac6795d | 5396 | */ |
cf3af59e | 5397 | static int check_existing_daemon(void) |
fac6795d | 5398 | { |
f472090a JG |
5399 | int ret = 0; |
5400 | ||
7d8234d9 | 5401 | /* Is there anybody out there ? */ |
099e26bd | 5402 | if (lttng_session_daemon_alive()) { |
f472090a JG |
5403 | ret = -EEXIST; |
5404 | goto end; | |
099e26bd | 5405 | } |
b09c7c76 | 5406 | |
f472090a JG |
5407 | lockfile_fd = create_lockfile(); |
5408 | if (lockfile_fd < 0) { | |
5409 | ret = -EEXIST; | |
5410 | goto end; | |
5411 | } | |
5412 | end: | |
5413 | return ret; | |
5414 | } | |
5415 | ||
5416 | static void sessiond_cleanup_lock_file(void) | |
5417 | { | |
5418 | int ret; | |
5419 | ||
5420 | /* | |
5421 | * Cleanup lock file by deleting it and finaly closing it which will | |
5422 | * release the file system lock. | |
5423 | */ | |
5424 | if (lockfile_fd >= 0) { | |
5425 | ret = remove(config.lock_file_path.value); | |
5426 | if (ret < 0) { | |
5427 | PERROR("remove lock file"); | |
5428 | } | |
5429 | ret = close(lockfile_fd); | |
5430 | if (ret < 0) { | |
5431 | PERROR("close lock file"); | |
5432 | } | |
5433 | } | |
fac6795d DG |
5434 | } |
5435 | ||
fac6795d | 5436 | /* |
d063d709 | 5437 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5438 | * |
d063d709 | 5439 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5440 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5441 | */ |
be040666 | 5442 | static int set_permissions(char *rundir) |
fac6795d DG |
5443 | { |
5444 | int ret; | |
996b65c8 | 5445 | gid_t gid; |
fac6795d | 5446 | |
e6142f2e | 5447 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 5448 | |
d6f42150 | 5449 | /* Set lttng run dir */ |
be040666 | 5450 | ret = chown(rundir, 0, gid); |
d6f42150 | 5451 | if (ret < 0) { |
be040666 | 5452 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5453 | PERROR("chown"); |
d6f42150 DG |
5454 | } |
5455 | ||
6c71277b MD |
5456 | /* |
5457 | * Ensure all applications and tracing group can search the run | |
5458 | * dir. Allow everyone to read the directory, since it does not | |
5459 | * buy us anything to hide its content. | |
5460 | */ | |
5461 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5462 | if (ret < 0) { |
5463 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5464 | PERROR("chmod"); |
d1613cf5 JN |
5465 | } |
5466 | ||
d6f42150 | 5467 | /* lttng client socket path */ |
e6142f2e | 5468 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 5469 | if (ret < 0) { |
e6142f2e | 5470 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 5471 | PERROR("chown"); |
d6f42150 DG |
5472 | } |
5473 | ||
3bd1e081 | 5474 | /* kconsumer error socket path */ |
6c71277b | 5475 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5476 | if (ret < 0) { |
3bd1e081 | 5477 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5478 | PERROR("chown"); |
3bd1e081 MD |
5479 | } |
5480 | ||
7753dea8 | 5481 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5482 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5483 | if (ret < 0) { |
5484 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5485 | PERROR("chown"); |
7753dea8 MD |
5486 | } |
5487 | ||
5488 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5489 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5490 | if (ret < 0) { |
7753dea8 | 5491 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5492 | PERROR("chown"); |
fac6795d DG |
5493 | } |
5494 | ||
d6f42150 | 5495 | DBG("All permissions are set"); |
e07ae692 | 5496 | |
fac6795d DG |
5497 | return ret; |
5498 | } | |
5499 | ||
d6f42150 | 5500 | /* |
d063d709 | 5501 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5502 | */ |
e6142f2e | 5503 | static int create_lttng_rundir(void) |
d6f42150 DG |
5504 | { |
5505 | int ret; | |
5506 | ||
e6142f2e | 5507 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 5508 | |
e6142f2e | 5509 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 5510 | if (ret < 0) { |
b1f11e69 | 5511 | if (errno != EEXIST) { |
e6142f2e | 5512 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
5513 | goto error; |
5514 | } else { | |
5515 | ret = 0; | |
5516 | } | |
d6f42150 DG |
5517 | } |
5518 | ||
5519 | error: | |
5520 | return ret; | |
5521 | } | |
5522 | ||
5523 | /* | |
e6142f2e | 5524 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 5525 | * session daemon. |
d6f42150 | 5526 | */ |
e6142f2e | 5527 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
5528 | { |
5529 | int ret; | |
e6142f2e | 5530 | char *path = NULL; |
d6f42150 | 5531 | |
6c71277b | 5532 | switch (consumer_data->type) { |
7753dea8 | 5533 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 5534 | path = config.kconsumerd_path.value; |
7753dea8 MD |
5535 | break; |
5536 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 5537 | path = config.consumerd64_path.value; |
7753dea8 MD |
5538 | break; |
5539 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 5540 | path = config.consumerd32_path.value; |
7753dea8 MD |
5541 | break; |
5542 | default: | |
5543 | ERR("Consumer type unknown"); | |
5544 | ret = -EINVAL; | |
5545 | goto error; | |
d6f42150 | 5546 | } |
e6142f2e | 5547 | assert(path); |
d6f42150 | 5548 | |
67e40797 DG |
5549 | DBG2("Creating consumer directory: %s", path); |
5550 | ||
6c71277b | 5551 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
5552 | if (ret < 0 && errno != EEXIST) { |
5553 | PERROR("mkdir"); | |
5554 | ERR("Failed to create %s", path); | |
5555 | goto error; | |
d6f42150 | 5556 | } |
6c71277b | 5557 | if (is_root) { |
e6142f2e | 5558 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
5559 | if (ret < 0) { |
5560 | ERR("Unable to set group on %s", path); | |
5561 | PERROR("chown"); | |
5562 | goto error; | |
5563 | } | |
5564 | } | |
d6f42150 | 5565 | |
e6142f2e | 5566 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
5567 | consumer_data->err_sock = |
5568 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5569 | if (consumer_data->err_sock < 0) { | |
5570 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5571 | ret = -1; |
5572 | goto error; | |
5573 | } | |
5574 | ||
a24f05ab MD |
5575 | /* |
5576 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5577 | * show must go on. | |
5578 | */ | |
5579 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5580 | if (ret < 0) { | |
5581 | PERROR("utils_set_fd_cloexec"); | |
5582 | /* continue anyway */ | |
5583 | } | |
5584 | ||
d6f42150 | 5585 | /* File permission MUST be 660 */ |
3bd1e081 | 5586 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5587 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5588 | if (ret < 0) { |
3bd1e081 | 5589 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5590 | PERROR("chmod"); |
d6f42150 DG |
5591 | goto error; |
5592 | } | |
5593 | ||
5594 | error: | |
5595 | return ret; | |
5596 | } | |
5597 | ||
fac6795d | 5598 | /* |
d063d709 | 5599 | * Signal handler for the daemon |
cf3af59e | 5600 | * |
54d01ffb DG |
5601 | * Simply stop all worker threads, leaving main() return gracefully after |
5602 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5603 | */ |
5604 | static void sighandler(int sig) | |
5605 | { | |
5606 | switch (sig) { | |
cf3af59e | 5607 | case SIGINT: |
af87c45a | 5608 | DBG("SIGINT caught"); |
cf3af59e MD |
5609 | stop_threads(); |
5610 | break; | |
5611 | case SIGTERM: | |
af87c45a | 5612 | DBG("SIGTERM caught"); |
cf3af59e MD |
5613 | stop_threads(); |
5614 | break; | |
0bb7724a DG |
5615 | case SIGUSR1: |
5616 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5617 | break; | |
cf3af59e MD |
5618 | default: |
5619 | break; | |
fac6795d | 5620 | } |
fac6795d DG |
5621 | } |
5622 | ||
5623 | /* | |
d063d709 | 5624 | * Setup signal handler for : |
1d4b027a | 5625 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5626 | */ |
1d4b027a | 5627 | static int set_signal_handler(void) |
fac6795d | 5628 | { |
1d4b027a DG |
5629 | int ret = 0; |
5630 | struct sigaction sa; | |
5631 | sigset_t sigset; | |
fac6795d | 5632 | |
1d4b027a | 5633 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5634 | PERROR("sigemptyset"); |
1d4b027a DG |
5635 | return ret; |
5636 | } | |
d6f42150 | 5637 | |
1d4b027a DG |
5638 | sa.sa_mask = sigset; |
5639 | sa.sa_flags = 0; | |
0072e5e2 MD |
5640 | |
5641 | sa.sa_handler = sighandler; | |
1d4b027a | 5642 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5643 | PERROR("sigaction"); |
1d4b027a | 5644 | return ret; |
d6f42150 DG |
5645 | } |
5646 | ||
1d4b027a | 5647 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5648 | PERROR("sigaction"); |
1d4b027a | 5649 | return ret; |
d6f42150 | 5650 | } |
aaf26714 | 5651 | |
0072e5e2 | 5652 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5653 | PERROR("sigaction"); |
1d4b027a | 5654 | return ret; |
8c0faa1d DG |
5655 | } |
5656 | ||
0072e5e2 MD |
5657 | sa.sa_handler = SIG_IGN; |
5658 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5659 | PERROR("sigaction"); |
5660 | return ret; | |
5661 | } | |
5662 | ||
5663 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5664 | |
5665 | return ret; | |
fac6795d DG |
5666 | } |
5667 | ||
f3ed775e | 5668 | /* |
d063d709 | 5669 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5670 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5671 | */ |
5672 | static void set_ulimit(void) | |
5673 | { | |
5674 | int ret; | |
5675 | struct rlimit lim; | |
5676 | ||
514bb9f0 | 5677 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5678 | lim.rlim_cur = 65535; |
5679 | lim.rlim_max = 65535; | |
5680 | ||
5681 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5682 | if (ret < 0) { | |
76d7553f | 5683 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5684 | } |
5685 | } | |
5686 | ||
4a15001e | 5687 | static int write_pidfile(void) |
35f90c40 | 5688 | { |
e6142f2e | 5689 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
5690 | } |
5691 | ||
e6142f2e JG |
5692 | static int set_clock_plugin_env(void) |
5693 | { | |
5694 | int ret = 0; | |
5695 | char *env_value = NULL; | |
cd9290dd | 5696 | |
e6142f2e JG |
5697 | if (!config.lttng_ust_clock_plugin.value) { |
5698 | goto end; | |
5699 | } | |
5700 | ||
5701 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
5702 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 5703 | if (ret < 0) { |
e6142f2e JG |
5704 | PERROR("asprintf"); |
5705 | goto end; | |
cd9290dd DG |
5706 | } |
5707 | ||
e6142f2e JG |
5708 | ret = putenv(env_value); |
5709 | if (ret) { | |
5710 | free(env_value); | |
5711 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
5712 | goto end; | |
5713 | } | |
cd9290dd | 5714 | |
e6142f2e JG |
5715 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
5716 | config.lttng_ust_clock_plugin.value); | |
5717 | end: | |
4a15001e | 5718 | return ret; |
ef367a93 JG |
5719 | } |
5720 | ||
d086f507 JD |
5721 | static |
5722 | struct rotation_thread_timer_queue *create_rotate_timer_queue(void) | |
5723 | { | |
5724 | struct rotation_thread_timer_queue *queue = NULL; | |
5725 | ||
5726 | queue = zmalloc(sizeof(struct rotation_thread_timer_queue)); | |
5727 | if (!queue) { | |
5728 | PERROR("Failed to allocate timer rotate queue"); | |
5729 | goto end; | |
5730 | } | |
5731 | ||
5732 | queue->event_pipe = lttng_pipe_open(FD_CLOEXEC | O_NONBLOCK); | |
5733 | CDS_INIT_LIST_HEAD(&queue->list); | |
5734 | pthread_mutex_init(&queue->lock, NULL); | |
5735 | ||
5736 | end: | |
5737 | return queue; | |
5738 | } | |
5739 | ||
5740 | static | |
5741 | void destroy_rotate_timer_queue(struct rotation_thread_timer_queue *queue) | |
5742 | { | |
5743 | struct sessiond_rotation_timer *node, *tmp_node; | |
5744 | ||
5745 | if (!queue) { | |
5746 | return; | |
5747 | } | |
5748 | ||
5749 | lttng_pipe_destroy(queue->event_pipe); | |
5750 | ||
5751 | pthread_mutex_lock(&queue->lock); | |
5752 | /* Empty wait queue. */ | |
5753 | cds_list_for_each_entry_safe(node, tmp_node, &queue->list, head) { | |
5754 | cds_list_del(&node->head); | |
5755 | free(node); | |
5756 | } | |
5757 | pthread_mutex_unlock(&queue->lock); | |
5758 | ||
5759 | pthread_mutex_destroy(&queue->lock); | |
5760 | free(queue); | |
5761 | } | |
5762 | ||
fac6795d DG |
5763 | /* |
5764 | * main | |
5765 | */ | |
5766 | int main(int argc, char **argv) | |
5767 | { | |
4a15001e | 5768 | int ret = 0, retval = 0; |
fac6795d | 5769 | void *status; |
e6142f2e | 5770 | const char *env_app_timeout; |
b3530820 JG |
5771 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
5772 | *ust64_channel_monitor_pipe = NULL, | |
5773 | *kernel_channel_monitor_pipe = NULL; | |
99611076 JG |
5774 | bool notification_thread_launched = false; |
5775 | bool rotation_thread_launched = false; | |
5776 | bool timer_thread_launched = false; | |
62c43103 JD |
5777 | struct lttng_pipe *ust32_channel_rotate_pipe = NULL, |
5778 | *ust64_channel_rotate_pipe = NULL, | |
5779 | *kernel_channel_rotate_pipe = NULL; | |
d086f507 JD |
5780 | struct timer_thread_parameters timer_thread_ctx; |
5781 | /* Queue of rotation jobs populated by the sessiond-timer. */ | |
5782 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
90936dcf | 5783 | sem_t notification_thread_ready; |
fac6795d | 5784 | |
335a95b7 MD |
5785 | init_kernel_workarounds(); |
5786 | ||
f6a9efaa DG |
5787 | rcu_register_thread(); |
5788 | ||
4a15001e MD |
5789 | if (set_signal_handler()) { |
5790 | retval = -1; | |
5791 | goto exit_set_signal_handler; | |
0bb7724a DG |
5792 | } |
5793 | ||
d086f507 JD |
5794 | if (sessiond_timer_signal_init()) { |
5795 | retval = -1; | |
5796 | goto exit_set_signal_handler; | |
5797 | } | |
5798 | ||
12744796 DG |
5799 | page_size = sysconf(_SC_PAGESIZE); |
5800 | if (page_size < 0) { | |
5801 | PERROR("sysconf _SC_PAGESIZE"); | |
5802 | page_size = LONG_MAX; | |
5803 | WARN("Fallback page size to %ld", page_size); | |
5804 | } | |
5805 | ||
e6142f2e JG |
5806 | ret = sessiond_config_init(&config); |
5807 | if (ret) { | |
5808 | retval = -1; | |
5809 | goto exit_set_signal_handler; | |
5810 | } | |
5811 | ||
4a15001e MD |
5812 | /* |
5813 | * Parse arguments and load the daemon configuration file. | |
5814 | * | |
5815 | * We have an exit_options exit path to free memory reserved by | |
5816 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5817 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5818 | * depends on set_options. | |
5819 | */ | |
fac6795d | 5820 | progname = argv[0]; |
4a15001e MD |
5821 | if (set_options(argc, argv)) { |
5822 | retval = -1; | |
5823 | goto exit_options; | |
fac6795d DG |
5824 | } |
5825 | ||
e6142f2e JG |
5826 | /* Init config from environment variables. */ |
5827 | sessiond_config_apply_env_config(&config); | |
5828 | ||
5829 | /* | |
5830 | * Resolve all paths received as arguments, configuration option, or | |
5831 | * through environment variable as absolute paths. This is necessary | |
5832 | * since daemonizing causes the sessiond's current working directory | |
5833 | * to '/'. | |
5834 | */ | |
5835 | ret = sessiond_config_resolve_paths(&config); | |
5836 | if (ret) { | |
5837 | goto exit_options; | |
5838 | } | |
5839 | ||
5840 | /* Apply config. */ | |
5841 | lttng_opt_verbose = config.verbose; | |
5842 | lttng_opt_quiet = config.quiet; | |
5843 | kconsumer_data.err_unix_sock_path = | |
5844 | config.kconsumerd_err_unix_sock_path.value; | |
5845 | kconsumer_data.cmd_unix_sock_path = | |
5846 | config.kconsumerd_cmd_unix_sock_path.value; | |
5847 | ustconsumer32_data.err_unix_sock_path = | |
5848 | config.consumerd32_err_unix_sock_path.value; | |
5849 | ustconsumer32_data.cmd_unix_sock_path = | |
5850 | config.consumerd32_cmd_unix_sock_path.value; | |
5851 | ustconsumer64_data.err_unix_sock_path = | |
5852 | config.consumerd64_err_unix_sock_path.value; | |
5853 | ustconsumer64_data.cmd_unix_sock_path = | |
5854 | config.consumerd64_cmd_unix_sock_path.value; | |
5855 | set_clock_plugin_env(); | |
5856 | ||
5857 | sessiond_config_log(&config); | |
5858 | ||
f472090a JG |
5859 | if (create_lttng_rundir()) { |
5860 | retval = -1; | |
5861 | goto exit_options; | |
5862 | } | |
5863 | ||
5864 | /* Abort launch if a session daemon is already running. */ | |
5865 | if (check_existing_daemon()) { | |
5866 | ERR("A session daemon is already running."); | |
5867 | retval = -1; | |
5868 | goto exit_options; | |
5869 | } | |
5870 | ||
fac6795d | 5871 | /* Daemonize */ |
e6142f2e | 5872 | if (config.daemonize || config.background) { |
ceed52b5 MD |
5873 | int i; |
5874 | ||
72dd7491 | 5875 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 5876 | !config.background); |
53094c05 | 5877 | if (ret < 0) { |
4a15001e MD |
5878 | retval = -1; |
5879 | goto exit_options; | |
53094c05 | 5880 | } |
0bb7724a | 5881 | |
ceed52b5 | 5882 | /* |
0bb7724a | 5883 | * We are in the child. Make sure all other file descriptors are |
4a15001e | 5884 | * closed, in case we are called with more opened file |
f472090a | 5885 | * descriptors than the standard ones and the lock file. |
ceed52b5 MD |
5886 | */ |
5887 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
f472090a JG |
5888 | if (i == lockfile_fd) { |
5889 | continue; | |
5890 | } | |
ceed52b5 MD |
5891 | (void) close(i); |
5892 | } | |
5893 | } | |
5894 | ||
7567352f MD |
5895 | if (run_as_create_worker(argv[0]) < 0) { |
5896 | goto exit_create_run_as_worker_cleanup; | |
5897 | } | |
5898 | ||
4a15001e MD |
5899 | /* |
5900 | * Starting from here, we can create threads. This needs to be after | |
5901 | * lttng_daemonize due to RCU. | |
5902 | */ | |
5903 | ||
5904 | /* | |
5905 | * Initialize the health check subsystem. This call should set the | |
5906 | * appropriate time values. | |
5907 | */ | |
5908 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5909 | if (!health_sessiond) { | |
5910 | PERROR("health_app_create error"); | |
5911 | retval = -1; | |
5912 | goto exit_health_sessiond_cleanup; | |
5913 | } | |
5914 | ||
4a15001e | 5915 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 5916 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
5917 | retval = -1; |
5918 | goto exit_ht_cleanup; | |
5919 | } | |
5920 | ||
ceed52b5 | 5921 | /* Create thread quit pipe */ |
4a15001e MD |
5922 | if (init_thread_quit_pipe()) { |
5923 | retval = -1; | |
5924 | goto exit_init_data; | |
fac6795d DG |
5925 | } |
5926 | ||
5927 | /* Check if daemon is UID = 0 */ | |
5928 | is_root = !getuid(); | |
fac6795d | 5929 | if (is_root) { |
67e40797 | 5930 | /* Create global run dir with root access */ |
67e40797 | 5931 | |
b3530820 JG |
5932 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
5933 | if (!kernel_channel_monitor_pipe) { | |
5934 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
5935 | retval = -1; | |
5936 | goto exit_init_data; | |
5937 | } | |
5938 | kconsumer_data.channel_monitor_pipe = | |
5939 | lttng_pipe_release_writefd( | |
5940 | kernel_channel_monitor_pipe); | |
5941 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
5942 | retval = -1; | |
5943 | goto exit_init_data; | |
5944 | } | |
62c43103 JD |
5945 | kernel_channel_rotate_pipe = lttng_pipe_open(0); |
5946 | if (!kernel_channel_rotate_pipe) { | |
5947 | ERR("Failed to create kernel consumer channel rotate pipe"); | |
5948 | retval = -1; | |
5949 | goto exit_init_data; | |
5950 | } | |
5951 | kconsumer_data.channel_rotate_pipe = | |
5952 | lttng_pipe_release_writefd( | |
5953 | kernel_channel_rotate_pipe); | |
5954 | if (kconsumer_data.channel_rotate_pipe < 0) { | |
5955 | retval = -1; | |
5956 | goto exit_init_data; | |
5957 | } | |
fac6795d DG |
5958 | } |
5959 | ||
5c827ce0 DG |
5960 | /* Set consumer initial state */ |
5961 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5962 | ust_consumerd_state = CONSUMER_STOPPED; | |
5963 | ||
b3530820 JG |
5964 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
5965 | if (!ust32_channel_monitor_pipe) { | |
5966 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
5967 | retval = -1; | |
5968 | goto exit_init_data; | |
5969 | } | |
5970 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
5971 | ust32_channel_monitor_pipe); | |
5972 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
5973 | retval = -1; | |
5974 | goto exit_init_data; | |
5975 | } | |
62c43103 JD |
5976 | ust32_channel_rotate_pipe = lttng_pipe_open(0); |
5977 | if (!ust32_channel_rotate_pipe) { | |
5978 | ERR("Failed to create 32-bit user space consumer channel rotate pipe"); | |
5979 | retval = -1; | |
5980 | goto exit_init_data; | |
5981 | } | |
5982 | ustconsumer32_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
5983 | ust32_channel_rotate_pipe); | |
5984 | if (ustconsumer32_data.channel_rotate_pipe < 0) { | |
5985 | retval = -1; | |
5986 | goto exit_init_data; | |
5987 | } | |
5988 | ||
d086f507 JD |
5989 | /* |
5990 | * The rotation_timer_queue structure is shared between the sessiond timer | |
5991 | * thread and the rotation thread. The main() keeps the ownership and | |
5992 | * destroys it when both threads have quit. | |
5993 | */ | |
5994 | rotation_timer_queue = create_rotate_timer_queue(); | |
5995 | if (!rotation_timer_queue) { | |
5996 | retval = -1; | |
5997 | goto exit_init_data; | |
5998 | } | |
5999 | timer_thread_ctx.rotation_timer_queue = rotation_timer_queue; | |
67e40797 | 6000 | |
b3530820 JG |
6001 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
6002 | if (!ust64_channel_monitor_pipe) { | |
6003 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
6004 | retval = -1; | |
6005 | goto exit_init_data; | |
6006 | } | |
6007 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
6008 | ust64_channel_monitor_pipe); | |
6009 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
6010 | retval = -1; | |
6011 | goto exit_init_data; | |
6012 | } | |
62c43103 JD |
6013 | ust64_channel_rotate_pipe = lttng_pipe_open(0); |
6014 | if (!ust64_channel_rotate_pipe) { | |
6015 | ERR("Failed to create 64-bit user space consumer channel rotate pipe"); | |
6016 | retval = -1; | |
6017 | goto exit_init_data; | |
6018 | } | |
6019 | ustconsumer64_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
6020 | ust64_channel_rotate_pipe); | |
6021 | if (ustconsumer64_data.channel_rotate_pipe < 0) { | |
6022 | retval = -1; | |
6023 | goto exit_init_data; | |
6024 | } | |
847177cd | 6025 | |
1427f9b2 DG |
6026 | /* |
6027 | * Init UST app hash table. Alloc hash table before this point since | |
6028 | * cleanup() can get called after that point. | |
6029 | */ | |
4a15001e | 6030 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 6031 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
6032 | retval = -1; |
6033 | goto exit_init_data; | |
6034 | } | |
1427f9b2 | 6035 | |
6a4e4039 JG |
6036 | /* |
6037 | * Initialize agent app hash table. We allocate the hash table here | |
6038 | * since cleanup() can get called after this point. | |
6039 | */ | |
6040 | if (agent_app_ht_alloc()) { | |
6041 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
6042 | retval = -1; |
6043 | goto exit_init_data; | |
f20baf8e DG |
6044 | } |
6045 | ||
a88df331 DG |
6046 | /* |
6047 | * These actions must be executed as root. We do that *after* setting up | |
6048 | * the sockets path because we MUST make the check for another daemon using | |
6049 | * those paths *before* trying to set the kernel consumer sockets and init | |
6050 | * kernel tracer. | |
6051 | */ | |
6052 | if (is_root) { | |
e6142f2e | 6053 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
6054 | retval = -1; |
6055 | goto exit_init_data; | |
7753dea8 MD |
6056 | } |
6057 | ||
a88df331 | 6058 | /* Setup kernel tracer */ |
e6142f2e | 6059 | if (!config.no_kernel) { |
4fba7219 | 6060 | init_kernel_tracer(); |
89588270 DG |
6061 | if (kernel_tracer_fd >= 0) { |
6062 | ret = syscall_init_table(); | |
6063 | if (ret < 0) { | |
4a15001e MD |
6064 | ERR("Unable to populate syscall table. " |
6065 | "Syscall tracing won't work " | |
6066 | "for this session daemon."); | |
89588270 | 6067 | } |
834978fd | 6068 | } |
4fba7219 | 6069 | } |
a88df331 DG |
6070 | |
6071 | /* Set ulimit for open files */ | |
6072 | set_ulimit(); | |
fac6795d | 6073 | } |
4063050c MD |
6074 | /* init lttng_fd tracking must be done after set_ulimit. */ |
6075 | lttng_fd_init(); | |
fac6795d | 6076 | |
e6142f2e | 6077 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
6078 | retval = -1; |
6079 | goto exit_init_data; | |
67e40797 DG |
6080 | } |
6081 | ||
e6142f2e | 6082 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
6083 | retval = -1; |
6084 | goto exit_init_data; | |
67e40797 DG |
6085 | } |
6086 | ||
d6f42150 | 6087 | /* Setup the needed unix socket */ |
4a15001e MD |
6088 | if (init_daemon_socket()) { |
6089 | retval = -1; | |
6090 | goto exit_init_data; | |
fac6795d DG |
6091 | } |
6092 | ||
6093 | /* Set credentials to socket */ | |
e6142f2e | 6094 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
6095 | retval = -1; |
6096 | goto exit_init_data; | |
fac6795d DG |
6097 | } |
6098 | ||
5b8719f5 | 6099 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 6100 | if (config.sig_parent) { |
5b8719f5 DG |
6101 | ppid = getppid(); |
6102 | } | |
6103 | ||
7a485870 | 6104 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 6105 | if (is_root && !config.no_kernel) { |
4a15001e MD |
6106 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
6107 | retval = -1; | |
6108 | goto exit_init_data; | |
6620da75 | 6109 | } |
7a485870 DG |
6110 | } |
6111 | ||
099e26bd | 6112 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
6113 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
6114 | retval = -1; | |
6115 | goto exit_init_data; | |
099e26bd DG |
6116 | } |
6117 | ||
d0b96690 | 6118 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
6119 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
6120 | retval = -1; | |
6121 | goto exit_init_data; | |
d0b96690 DG |
6122 | } |
6123 | ||
7972aab2 DG |
6124 | /* Initialize global buffer per UID and PID registry. */ |
6125 | buffer_reg_init_uid_registry(); | |
6126 | buffer_reg_init_pid_registry(); | |
6127 | ||
099e26bd | 6128 | /* Init UST command queue. */ |
8bdee6e2 | 6129 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 6130 | |
273ea72c | 6131 | /* |
4a15001e MD |
6132 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
6133 | * is statically declared in session.c | |
273ea72c | 6134 | */ |
54d01ffb | 6135 | session_list_ptr = session_get_list(); |
b5541356 | 6136 | |
2f77fc4b | 6137 | cmd_init(); |
00e2e675 | 6138 | |
ae9e45b3 DG |
6139 | /* Check for the application socket timeout env variable. */ |
6140 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
6141 | if (env_app_timeout) { | |
e6142f2e | 6142 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 6143 | } else { |
e6142f2e | 6144 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
6145 | } |
6146 | ||
4a15001e MD |
6147 | ret = write_pidfile(); |
6148 | if (ret) { | |
6149 | ERR("Error in write_pidfile"); | |
6150 | retval = -1; | |
6151 | goto exit_init_data; | |
6152 | } | |
35f90c40 | 6153 | |
554831e7 MD |
6154 | /* Initialize communication library */ |
6155 | lttcomm_init(); | |
4a15001e | 6156 | /* Initialize TCP timeout values */ |
d831c249 | 6157 | lttcomm_inet_init(); |
554831e7 | 6158 | |
ef367a93 | 6159 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
6160 | retval = -1; |
6161 | goto exit_init_data; | |
ef367a93 | 6162 | } |
e6142f2e | 6163 | load_info->path = config.load_session_path.value; |
ef367a93 | 6164 | |
12b4fb37 | 6165 | /* Create health-check thread. */ |
1a1a34b4 | 6166 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 6167 | thread_manage_health, (void *) NULL); |
4a15001e MD |
6168 | if (ret) { |
6169 | errno = ret; | |
44a5e5eb | 6170 | PERROR("pthread_create health"); |
4a15001e | 6171 | retval = -1; |
44a5e5eb DG |
6172 | goto exit_health; |
6173 | } | |
6174 | ||
90936dcf JD |
6175 | /* |
6176 | * The rotation thread needs the notification thread to be ready before | |
6177 | * creating the rotate_notification_channel, so we use this semaphore as | |
6178 | * a rendez-vous point. | |
6179 | */ | |
6180 | sem_init(¬ification_thread_ready, 0, 0); | |
6181 | ||
b3530820 JG |
6182 | /* notification_thread_data acquires the pipes' read side. */ |
6183 | notification_thread_handle = notification_thread_handle_create( | |
6184 | ust32_channel_monitor_pipe, | |
6185 | ust64_channel_monitor_pipe, | |
90936dcf JD |
6186 | kernel_channel_monitor_pipe, |
6187 | ¬ification_thread_ready); | |
b3530820 JG |
6188 | if (!notification_thread_handle) { |
6189 | retval = -1; | |
6190 | ERR("Failed to create notification thread shared data"); | |
6191 | stop_threads(); | |
6192 | goto exit_notification; | |
6193 | } | |
6194 | ||
6195 | /* Create notification thread. */ | |
6196 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
6197 | thread_notification, notification_thread_handle); | |
6198 | if (ret) { | |
6199 | errno = ret; | |
6200 | PERROR("pthread_create notification"); | |
6201 | retval = -1; | |
6202 | stop_threads(); | |
6203 | goto exit_notification; | |
6204 | } | |
99611076 | 6205 | notification_thread_launched = true; |
b3530820 | 6206 | |
d086f507 JD |
6207 | /* Create timer thread. */ |
6208 | ret = pthread_create(&timer_thread, default_pthread_attr(), | |
6209 | sessiond_timer_thread, &timer_thread_ctx); | |
6210 | if (ret) { | |
6211 | errno = ret; | |
6212 | PERROR("pthread_create timer"); | |
6213 | retval = -1; | |
6214 | stop_threads(); | |
6215 | goto exit_notification; | |
6216 | } | |
99611076 | 6217 | timer_thread_launched = true; |
d086f507 | 6218 | |
db66e574 JD |
6219 | /* rotation_thread_data acquires the pipes' read side. */ |
6220 | rotation_thread_handle = rotation_thread_handle_create( | |
6221 | ust32_channel_rotate_pipe, | |
6222 | ust64_channel_rotate_pipe, | |
6223 | kernel_channel_rotate_pipe, | |
d086f507 | 6224 | thread_quit_pipe[0], |
90936dcf JD |
6225 | rotation_timer_queue, |
6226 | notification_thread_handle, | |
6227 | ¬ification_thread_ready); | |
db66e574 JD |
6228 | if (!rotation_thread_handle) { |
6229 | retval = -1; | |
6230 | ERR("Failed to create rotation thread shared data"); | |
6231 | stop_threads(); | |
6232 | goto exit_rotation; | |
6233 | } | |
db66e574 JD |
6234 | |
6235 | /* Create rotation thread. */ | |
6236 | ret = pthread_create(&rotation_thread, default_pthread_attr(), | |
6237 | thread_rotation, rotation_thread_handle); | |
6238 | if (ret) { | |
6239 | errno = ret; | |
6240 | PERROR("pthread_create rotation"); | |
6241 | retval = -1; | |
6242 | stop_threads(); | |
6243 | goto exit_rotation; | |
6244 | } | |
99611076 | 6245 | rotation_thread_launched = true; |
db66e574 | 6246 | |
cf3af59e | 6247 | /* Create thread to manage the client socket */ |
1a1a34b4 | 6248 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 6249 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
6250 | if (ret) { |
6251 | errno = ret; | |
76d7553f | 6252 | PERROR("pthread_create clients"); |
4a15001e | 6253 | retval = -1; |
b3530820 | 6254 | stop_threads(); |
cf3af59e MD |
6255 | goto exit_client; |
6256 | } | |
fac6795d | 6257 | |
099e26bd | 6258 | /* Create thread to dispatch registration */ |
1a1a34b4 | 6259 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 6260 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
6261 | if (ret) { |
6262 | errno = ret; | |
76d7553f | 6263 | PERROR("pthread_create dispatch"); |
4a15001e | 6264 | retval = -1; |
b3530820 | 6265 | stop_threads(); |
099e26bd DG |
6266 | goto exit_dispatch; |
6267 | } | |
6268 | ||
6269 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 6270 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 6271 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
6272 | if (ret) { |
6273 | errno = ret; | |
76d7553f | 6274 | PERROR("pthread_create registration"); |
4a15001e | 6275 | retval = -1; |
b3530820 | 6276 | stop_threads(); |
099e26bd DG |
6277 | goto exit_reg_apps; |
6278 | } | |
6279 | ||
cf3af59e | 6280 | /* Create thread to manage application socket */ |
1a1a34b4 | 6281 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 6282 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
6283 | if (ret) { |
6284 | errno = ret; | |
d0b96690 | 6285 | PERROR("pthread_create apps"); |
4a15001e | 6286 | retval = -1; |
b3530820 | 6287 | stop_threads(); |
d0b96690 DG |
6288 | goto exit_apps; |
6289 | } | |
6290 | ||
6291 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 6292 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 6293 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
6294 | if (ret) { |
6295 | errno = ret; | |
f5c32ef1 | 6296 | PERROR("pthread_create notify"); |
4a15001e | 6297 | retval = -1; |
b3530820 | 6298 | stop_threads(); |
9563b0ad | 6299 | goto exit_apps_notify; |
cf3af59e | 6300 | } |
fac6795d | 6301 | |
022d91ba | 6302 | /* Create agent registration thread. */ |
1a1a34b4 | 6303 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 6304 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
6305 | if (ret) { |
6306 | errno = ret; | |
022d91ba | 6307 | PERROR("pthread_create agent"); |
4a15001e | 6308 | retval = -1; |
b3530820 | 6309 | stop_threads(); |
022d91ba | 6310 | goto exit_agent_reg; |
4d076222 DG |
6311 | } |
6312 | ||
6620da75 | 6313 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 6314 | if (is_root && !config.no_kernel) { |
6620da75 | 6315 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 6316 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 6317 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
6318 | if (ret) { |
6319 | errno = ret; | |
6620da75 | 6320 | PERROR("pthread_create kernel"); |
4a15001e | 6321 | retval = -1; |
b3530820 | 6322 | stop_threads(); |
6620da75 DG |
6323 | goto exit_kernel; |
6324 | } | |
ef367a93 | 6325 | } |
7a485870 | 6326 | |
4a15001e | 6327 | /* Create session loading thread. */ |
1a1a34b4 MJ |
6328 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
6329 | thread_load_session, load_info); | |
4a15001e MD |
6330 | if (ret) { |
6331 | errno = ret; | |
6332 | PERROR("pthread_create load_session_thread"); | |
6333 | retval = -1; | |
b3530820 | 6334 | stop_threads(); |
4a15001e MD |
6335 | goto exit_load_session; |
6336 | } | |
6337 | ||
6338 | /* | |
6339 | * This is where we start awaiting program completion (e.g. through | |
6340 | * signal that asks threads to teardown). | |
6341 | */ | |
6342 | ||
6343 | ret = pthread_join(load_session_thread, &status); | |
6344 | if (ret) { | |
6345 | errno = ret; | |
6346 | PERROR("pthread_join load_session_thread"); | |
6347 | retval = -1; | |
6348 | } | |
6349 | exit_load_session: | |
ef367a93 | 6350 | |
e6142f2e | 6351 | if (is_root && !config.no_kernel) { |
6620da75 | 6352 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6353 | if (ret) { |
6354 | errno = ret; | |
6620da75 | 6355 | PERROR("pthread_join"); |
4a15001e | 6356 | retval = -1; |
6620da75 | 6357 | } |
fac6795d | 6358 | } |
cf3af59e | 6359 | exit_kernel: |
4a15001e | 6360 | |
022d91ba | 6361 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6362 | if (ret) { |
6363 | errno = ret; | |
022d91ba | 6364 | PERROR("pthread_join agent"); |
4a15001e | 6365 | retval = -1; |
4d076222 | 6366 | } |
022d91ba | 6367 | exit_agent_reg: |
4a15001e | 6368 | |
9563b0ad | 6369 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6370 | if (ret) { |
6371 | errno = ret; | |
9563b0ad | 6372 | PERROR("pthread_join apps notify"); |
4a15001e | 6373 | retval = -1; |
9563b0ad | 6374 | } |
9563b0ad | 6375 | exit_apps_notify: |
4a15001e | 6376 | |
cf3af59e | 6377 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6378 | if (ret) { |
6379 | errno = ret; | |
9563b0ad | 6380 | PERROR("pthread_join apps"); |
4a15001e | 6381 | retval = -1; |
cf3af59e | 6382 | } |
cf3af59e | 6383 | exit_apps: |
4a15001e | 6384 | |
099e26bd | 6385 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6386 | if (ret) { |
6387 | errno = ret; | |
76d7553f | 6388 | PERROR("pthread_join"); |
4a15001e | 6389 | retval = -1; |
099e26bd | 6390 | } |
099e26bd | 6391 | exit_reg_apps: |
4a15001e | 6392 | |
772b8f4d MD |
6393 | /* |
6394 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6395 | * we don't leak applications in the queue. | |
6396 | */ | |
099e26bd | 6397 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6398 | if (ret) { |
6399 | errno = ret; | |
76d7553f | 6400 | PERROR("pthread_join"); |
4a15001e | 6401 | retval = -1; |
099e26bd | 6402 | } |
099e26bd | 6403 | exit_dispatch: |
4a15001e | 6404 | |
cf3af59e | 6405 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6406 | if (ret) { |
6407 | errno = ret; | |
76d7553f | 6408 | PERROR("pthread_join"); |
4a15001e | 6409 | retval = -1; |
cf3af59e | 6410 | } |
a88df331 | 6411 | |
b3530820 | 6412 | exit_client: |
db66e574 | 6413 | exit_rotation: |
b3530820 | 6414 | exit_notification: |
90936dcf | 6415 | sem_destroy(¬ification_thread_ready); |
4a15001e MD |
6416 | ret = pthread_join(health_thread, &status); |
6417 | if (ret) { | |
6418 | errno = ret; | |
6419 | PERROR("pthread_join health thread"); | |
6420 | retval = -1; | |
06f525de DG |
6421 | } |
6422 | ||
b3530820 | 6423 | exit_health: |
4a15001e | 6424 | exit_init_data: |
4d62fbf8 MD |
6425 | /* |
6426 | * Wait for all pending call_rcu work to complete before tearing | |
6427 | * down data structures. call_rcu worker may be trying to | |
6428 | * perform lookups in those structures. | |
6429 | */ | |
6430 | rcu_barrier(); | |
4a15001e MD |
6431 | /* |
6432 | * sessiond_cleanup() is called when no other thread is running, except | |
6433 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6434 | */ | |
6435 | rcu_thread_online(); | |
6436 | sessiond_cleanup(); | |
06f525de | 6437 | |
c4d5de9d JG |
6438 | /* |
6439 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6440 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6441 | * the queue is empty before shutting down the clean-up thread. | |
6442 | */ | |
6443 | rcu_barrier(); | |
6444 | ||
b3530820 JG |
6445 | /* |
6446 | * The teardown of the notification system is performed after the | |
6447 | * session daemon's teardown in order to allow it to be notified | |
6448 | * of the active session and channels at the moment of the teardown. | |
6449 | */ | |
6450 | if (notification_thread_handle) { | |
99611076 | 6451 | if (notification_thread_launched) { |
6be1a386 JG |
6452 | notification_thread_command_quit( |
6453 | notification_thread_handle); | |
6454 | ret = pthread_join(notification_thread, &status); | |
6455 | if (ret) { | |
6456 | errno = ret; | |
6457 | PERROR("pthread_join notification thread"); | |
6458 | retval = -1; | |
6459 | } | |
3dec304b | 6460 | } |
6be1a386 | 6461 | notification_thread_handle_destroy(notification_thread_handle); |
b3530820 JG |
6462 | } |
6463 | ||
db66e574 | 6464 | if (rotation_thread_handle) { |
99611076 | 6465 | if (rotation_thread_launched) { |
db66e574 JD |
6466 | ret = pthread_join(rotation_thread, &status); |
6467 | if (ret) { | |
6468 | errno = ret; | |
6469 | PERROR("pthread_join rotation thread"); | |
6470 | retval = -1; | |
6471 | } | |
6472 | } | |
6473 | rotation_thread_handle_destroy(rotation_thread_handle); | |
6474 | } | |
6475 | ||
99611076 | 6476 | if (timer_thread_launched) { |
d086f507 JD |
6477 | kill(getpid(), LTTNG_SESSIOND_SIG_EXIT); |
6478 | ret = pthread_join(timer_thread, &status); | |
6479 | if (ret) { | |
6480 | errno = ret; | |
6481 | PERROR("pthread_join timer thread"); | |
6482 | retval = -1; | |
6483 | } | |
6484 | } | |
6485 | ||
6486 | /* | |
6487 | * After the rotation and timer thread have quit, we can safely destroy | |
6488 | * the rotation_timer_queue. | |
6489 | */ | |
6490 | destroy_rotate_timer_queue(rotation_timer_queue); | |
6491 | ||
b3530820 JG |
6492 | rcu_thread_offline(); |
6493 | rcu_unregister_thread(); | |
6494 | ||
5e97de00 | 6495 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6496 | if (ret) { |
4a15001e | 6497 | retval = -1; |
0b2dc8df | 6498 | } |
b3530820 JG |
6499 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
6500 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
6501 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
62c43103 JD |
6502 | lttng_pipe_destroy(ust32_channel_rotate_pipe); |
6503 | lttng_pipe_destroy(ust64_channel_rotate_pipe); | |
6504 | lttng_pipe_destroy(kernel_channel_rotate_pipe); | |
0b2dc8df | 6505 | exit_ht_cleanup: |
4a15001e | 6506 | |
4a15001e MD |
6507 | health_app_destroy(health_sessiond); |
6508 | exit_health_sessiond_cleanup: | |
7567352f | 6509 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6510 | |
6511 | exit_options: | |
f472090a | 6512 | sessiond_cleanup_lock_file(); |
4a15001e MD |
6513 | sessiond_cleanup_options(); |
6514 | ||
6515 | exit_set_signal_handler: | |
6516 | if (!retval) { | |
cf3af59e | 6517 | exit(EXIT_SUCCESS); |
4a15001e MD |
6518 | } else { |
6519 | exit(EXIT_FAILURE); | |
67e40797 | 6520 | } |
fac6795d | 6521 | } |