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" |
834978fd | 77 | #include "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 | /* |
b3530820 JG |
302 | * Whether sessiond is ready for commands/notification channel/health check |
303 | * requests. | |
97bc1426 | 304 | * NR_LTTNG_SESSIOND_READY must match the number of calls to |
ef367a93 | 305 | * sessiond_notify_ready(). |
97bc1426 | 306 | */ |
db66e574 | 307 | #define NR_LTTNG_SESSIOND_READY 5 |
97bc1426 MD |
308 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
309 | ||
5e97de00 JG |
310 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
311 | { | |
312 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
313 | } | |
314 | ||
97bc1426 | 315 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 JG |
316 | LTTNG_HIDDEN |
317 | void sessiond_notify_ready(void) | |
97bc1426 MD |
318 | { |
319 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
320 | /* | |
321 | * Notify parent pid that we are ready to accept command | |
322 | * for client side. This ppid is the one from the | |
323 | * external process that spawned us. | |
324 | */ | |
e6142f2e | 325 | if (config.sig_parent) { |
97bc1426 MD |
326 | kill(ppid, SIGUSR1); |
327 | } | |
328 | ||
329 | /* | |
330 | * Notify the parent of the fork() process that we are | |
331 | * ready. | |
332 | */ | |
e6142f2e | 333 | if (config.daemonize || config.background) { |
97bc1426 MD |
334 | kill(child_ppid, SIGUSR1); |
335 | } | |
336 | } | |
337 | } | |
338 | ||
4a15001e MD |
339 | static |
340 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
341 | int *a_pipe) | |
5eb91c98 DG |
342 | { |
343 | int ret; | |
344 | ||
d0b96690 | 345 | assert(events); |
5eb91c98 DG |
346 | |
347 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
348 | if (ret < 0) { | |
349 | goto error; | |
350 | } | |
351 | ||
352 | /* Add quit pipe */ | |
4a15001e | 353 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
354 | if (ret < 0) { |
355 | goto error; | |
356 | } | |
357 | ||
358 | return 0; | |
359 | ||
360 | error: | |
361 | return ret; | |
362 | } | |
363 | ||
4a15001e MD |
364 | /* |
365 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
366 | */ | |
367 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
368 | { | |
369 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
370 | } | |
371 | ||
273ea72c | 372 | /* |
5eb91c98 | 373 | * Init thread quit pipe. |
273ea72c DG |
374 | * |
375 | * Return -1 on error or 0 if all pipes are created. | |
376 | */ | |
4a15001e | 377 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 378 | { |
730389d9 | 379 | int ret, i; |
273ea72c | 380 | |
4a15001e | 381 | ret = pipe(a_pipe); |
273ea72c | 382 | if (ret < 0) { |
730389d9 | 383 | PERROR("thread quit pipe"); |
273ea72c DG |
384 | goto error; |
385 | } | |
386 | ||
730389d9 | 387 | for (i = 0; i < 2; i++) { |
4a15001e | 388 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
389 | if (ret < 0) { |
390 | PERROR("fcntl"); | |
391 | goto error; | |
392 | } | |
393 | } | |
394 | ||
273ea72c DG |
395 | error: |
396 | return ret; | |
397 | } | |
398 | ||
4a15001e MD |
399 | static int init_thread_quit_pipe(void) |
400 | { | |
401 | return __init_thread_quit_pipe(thread_quit_pipe); | |
402 | } | |
403 | ||
099e26bd DG |
404 | /* |
405 | * Stop all threads by closing the thread quit pipe. | |
406 | */ | |
cf3af59e MD |
407 | static void stop_threads(void) |
408 | { | |
5eb91c98 DG |
409 | int ret; |
410 | ||
cf3af59e MD |
411 | /* Stopping all threads */ |
412 | DBG("Terminating all threads"); | |
54d01ffb | 413 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
414 | if (ret < 0) { |
415 | ERR("write error on thread quit pipe"); | |
416 | } | |
417 | ||
099e26bd | 418 | /* Dispatch thread */ |
26c9d55e | 419 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 420 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
421 | } |
422 | ||
e975f9f8 DG |
423 | /* |
424 | * Close every consumer sockets. | |
425 | */ | |
426 | static void close_consumer_sockets(void) | |
427 | { | |
428 | int ret; | |
429 | ||
430 | if (kconsumer_data.err_sock >= 0) { | |
431 | ret = close(kconsumer_data.err_sock); | |
432 | if (ret < 0) { | |
433 | PERROR("kernel consumer err_sock close"); | |
434 | } | |
435 | } | |
436 | if (ustconsumer32_data.err_sock >= 0) { | |
437 | ret = close(ustconsumer32_data.err_sock); | |
438 | if (ret < 0) { | |
a76cbd9f | 439 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
440 | } |
441 | } | |
442 | if (ustconsumer64_data.err_sock >= 0) { | |
443 | ret = close(ustconsumer64_data.err_sock); | |
444 | if (ret < 0) { | |
a76cbd9f | 445 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
446 | } |
447 | } | |
448 | if (kconsumer_data.cmd_sock >= 0) { | |
449 | ret = close(kconsumer_data.cmd_sock); | |
450 | if (ret < 0) { | |
451 | PERROR("kernel consumer cmd_sock close"); | |
452 | } | |
453 | } | |
454 | if (ustconsumer32_data.cmd_sock >= 0) { | |
455 | ret = close(ustconsumer32_data.cmd_sock); | |
456 | if (ret < 0) { | |
a76cbd9f | 457 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
458 | } |
459 | } | |
460 | if (ustconsumer64_data.cmd_sock >= 0) { | |
461 | ret = close(ustconsumer64_data.cmd_sock); | |
462 | if (ret < 0) { | |
a76cbd9f | 463 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
464 | } |
465 | } | |
b3530820 JG |
466 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
467 | ret = close(kconsumer_data.channel_monitor_pipe); | |
468 | if (ret < 0) { | |
469 | PERROR("kernel consumer channel monitor pipe close"); | |
470 | } | |
471 | } | |
472 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
473 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
474 | if (ret < 0) { | |
475 | PERROR("UST consumerd32 channel monitor pipe close"); | |
476 | } | |
477 | } | |
478 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
479 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
480 | if (ret < 0) { | |
481 | PERROR("UST consumerd64 channel monitor pipe close"); | |
482 | } | |
483 | } | |
62c43103 JD |
484 | if (kconsumer_data.channel_rotate_pipe >= 0) { |
485 | ret = close(kconsumer_data.channel_rotate_pipe); | |
486 | if (ret < 0) { | |
487 | PERROR("kernel consumer channel rotate pipe close"); | |
488 | } | |
489 | } | |
490 | if (ustconsumer32_data.channel_rotate_pipe >= 0) { | |
491 | ret = close(ustconsumer32_data.channel_rotate_pipe); | |
492 | if (ret < 0) { | |
493 | PERROR("UST consumerd32 channel rotate pipe close"); | |
494 | } | |
495 | } | |
496 | if (ustconsumer64_data.channel_rotate_pipe >= 0) { | |
497 | ret = close(ustconsumer64_data.channel_rotate_pipe); | |
498 | if (ret < 0) { | |
499 | PERROR("UST consumerd64 channel rotate pipe close"); | |
500 | } | |
501 | } | |
e975f9f8 DG |
502 | } |
503 | ||
4e4714cb JR |
504 | /* |
505 | * Wait on consumer process termination. | |
506 | * | |
507 | * Need to be called with the consumer data lock held or from a context | |
508 | * ensuring no concurrent access to data (e.g: cleanup). | |
509 | */ | |
510 | static void wait_consumer(struct consumer_data *consumer_data) | |
511 | { | |
512 | pid_t ret; | |
513 | int status; | |
514 | ||
515 | if (consumer_data->pid <= 0) { | |
516 | return; | |
517 | } | |
518 | ||
519 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
520 | consumer_data->pid); | |
521 | ret = waitpid(consumer_data->pid, &status, 0); | |
522 | if (ret == -1) { | |
523 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 524 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
525 | ERR("consumerd termination with error: %d", |
526 | WEXITSTATUS(ret)); | |
527 | } | |
528 | consumer_data->pid = 0; | |
529 | } | |
530 | ||
fac6795d | 531 | /* |
4a15001e | 532 | * Cleanup the session daemon's data structures. |
fac6795d | 533 | */ |
4a15001e | 534 | static void sessiond_cleanup(void) |
fac6795d | 535 | { |
ef599319 | 536 | int ret; |
af9737e9 | 537 | struct ltt_session *sess, *stmp; |
fac6795d | 538 | |
4a15001e | 539 | DBG("Cleanup sessiond"); |
e07ae692 | 540 | |
4e449f3f MD |
541 | /* |
542 | * Close the thread quit pipe. It has already done its job, | |
543 | * since we are now called. | |
544 | */ | |
2f77fc4b DG |
545 | utils_close_pipe(thread_quit_pipe); |
546 | ||
35f90c40 | 547 | /* |
e6142f2e JG |
548 | * If config.pid_file_path.value is undefined, the default file will be |
549 | * wiped when removing the rundir. | |
35f90c40 | 550 | */ |
e6142f2e JG |
551 | if (config.pid_file_path.value) { |
552 | ret = remove(config.pid_file_path.value); | |
35f90c40 | 553 | if (ret < 0) { |
e6142f2e | 554 | PERROR("remove pidfile %s", config.pid_file_path.value); |
35f90c40 DG |
555 | } |
556 | } | |
557 | ||
e6142f2e JG |
558 | DBG("Removing sessiond and consumerd content of directory %s", |
559 | config.rundir.value); | |
8c6c56c2 MD |
560 | |
561 | /* sessiond */ | |
e6142f2e JG |
562 | DBG("Removing %s", config.pid_file_path.value); |
563 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 564 | |
e6142f2e JG |
565 | DBG("Removing %s", config.agent_port_file_path.value); |
566 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 567 | |
8c6c56c2 | 568 | /* kconsumerd */ |
e6142f2e JG |
569 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
570 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
571 | ||
572 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
573 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
574 | |
575 | /* ust consumerd 32 */ | |
e6142f2e JG |
576 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
577 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
578 | ||
579 | DBG("Removing directory %s", config.consumerd32_path.value); | |
580 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
581 | |
582 | /* ust consumerd 64 */ | |
e6142f2e JG |
583 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
584 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
585 | ||
586 | DBG("Removing directory %s", config.consumerd64_path.value); | |
587 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 588 | |
99bab54f | 589 | DBG("Cleaning up all sessions"); |
fac6795d | 590 | |
b5541356 | 591 | /* Destroy session list mutex */ |
273ea72c DG |
592 | if (session_list_ptr != NULL) { |
593 | pthread_mutex_destroy(&session_list_ptr->lock); | |
594 | ||
595 | /* Cleanup ALL session */ | |
54d01ffb DG |
596 | cds_list_for_each_entry_safe(sess, stmp, |
597 | &session_list_ptr->head, list) { | |
90936dcf JD |
598 | cmd_destroy_session(sess, kernel_poll_pipe[1], |
599 | notification_thread_handle); | |
273ea72c DG |
600 | } |
601 | } | |
602 | ||
4e4714cb JR |
603 | wait_consumer(&kconsumer_data); |
604 | wait_consumer(&ustconsumer64_data); | |
605 | wait_consumer(&ustconsumer32_data); | |
606 | ||
6a4e4039 JG |
607 | DBG("Cleaning up all agent apps"); |
608 | agent_app_ht_clean(); | |
609 | ||
099e26bd | 610 | DBG("Closing all UST sockets"); |
56fff090 | 611 | ust_app_clean_list(); |
7972aab2 | 612 | buffer_reg_destroy_registries(); |
099e26bd | 613 | |
e6142f2e | 614 | if (is_root && !config.no_kernel) { |
4fba7219 | 615 | DBG2("Closing kernel fd"); |
a4b35e07 | 616 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
617 | ret = close(kernel_tracer_fd); |
618 | if (ret) { | |
619 | PERROR("close"); | |
620 | } | |
a4b35e07 | 621 | } |
2f50c8a3 | 622 | DBG("Unloading kernel modules"); |
096102bd | 623 | modprobe_remove_lttng_all(); |
834978fd | 624 | free(syscall_table); |
2f50c8a3 | 625 | } |
2f77fc4b | 626 | |
e975f9f8 DG |
627 | close_consumer_sockets(); |
628 | ||
ef367a93 JG |
629 | if (load_info) { |
630 | load_session_destroy_data(load_info); | |
631 | free(load_info); | |
632 | } | |
633 | ||
c9cb3e7d JG |
634 | /* |
635 | * Cleanup lock file by deleting it and finaly closing it which will | |
636 | * release the file system lock. | |
637 | */ | |
638 | if (lockfile_fd >= 0) { | |
e6142f2e JG |
639 | ret = remove(config.lock_file_path.value); |
640 | if (ret < 0) { | |
641 | PERROR("remove lock file"); | |
642 | } | |
643 | ret = close(lockfile_fd); | |
644 | if (ret < 0) { | |
645 | PERROR("close lock file"); | |
c9cb3e7d JG |
646 | } |
647 | } | |
648 | ||
649 | /* | |
650 | * We do NOT rmdir rundir because there are other processes | |
651 | * using it, for instance lttng-relayd, which can start in | |
652 | * parallel with this teardown. | |
653 | */ | |
4a15001e MD |
654 | } |
655 | ||
656 | /* | |
657 | * Cleanup the daemon's option data structures. | |
658 | */ | |
659 | static void sessiond_cleanup_options(void) | |
660 | { | |
661 | DBG("Cleaning up options"); | |
662 | ||
e6142f2e | 663 | sessiond_config_fini(&config); |
c9cb3e7d | 664 | |
7567352f | 665 | run_as_destroy_worker(); |
fac6795d DG |
666 | } |
667 | ||
e065084a | 668 | /* |
d063d709 | 669 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 670 | * |
d063d709 | 671 | * Return lttcomm error code. |
e065084a DG |
672 | */ |
673 | static int send_unix_sock(int sock, void *buf, size_t len) | |
674 | { | |
675 | /* Check valid length */ | |
c617c0c6 | 676 | if (len == 0) { |
e065084a DG |
677 | return -1; |
678 | } | |
679 | ||
680 | return lttcomm_send_unix_sock(sock, buf, len); | |
681 | } | |
682 | ||
5461b305 | 683 | /* |
d063d709 | 684 | * Free memory of a command context structure. |
5461b305 | 685 | */ |
a2fb29a5 | 686 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 687 | { |
a2fb29a5 DG |
688 | DBG("Clean command context structure"); |
689 | if (*cmd_ctx) { | |
690 | if ((*cmd_ctx)->llm) { | |
691 | free((*cmd_ctx)->llm); | |
5461b305 | 692 | } |
a2fb29a5 DG |
693 | if ((*cmd_ctx)->lsm) { |
694 | free((*cmd_ctx)->lsm); | |
5461b305 | 695 | } |
a2fb29a5 DG |
696 | free(*cmd_ctx); |
697 | *cmd_ctx = NULL; | |
5461b305 DG |
698 | } |
699 | } | |
700 | ||
fac6795d | 701 | /* |
0fdd1e2c | 702 | * Notify UST applications using the shm mmap futex. |
fac6795d | 703 | */ |
0fdd1e2c | 704 | static int notify_ust_apps(int active) |
fac6795d | 705 | { |
0fdd1e2c | 706 | char *wait_shm_mmap; |
fac6795d | 707 | |
0fdd1e2c | 708 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 709 | |
0fdd1e2c | 710 | /* See shm.c for this call implying mmap, shm and futex calls */ |
e6142f2e | 711 | wait_shm_mmap = shm_ust_get_mmap(config.wait_shm_path.value, is_root); |
0fdd1e2c | 712 | if (wait_shm_mmap == NULL) { |
fac6795d DG |
713 | goto error; |
714 | } | |
715 | ||
0fdd1e2c DG |
716 | /* Wake waiting process */ |
717 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
718 | ||
719 | /* Apps notified successfully */ | |
720 | return 0; | |
fac6795d DG |
721 | |
722 | error: | |
0fdd1e2c | 723 | return -1; |
fac6795d DG |
724 | } |
725 | ||
e065084a | 726 | /* |
d063d709 DG |
727 | * Setup the outgoing data buffer for the response (llm) by allocating the |
728 | * right amount of memory and copying the original information from the lsm | |
729 | * structure. | |
ca95a216 | 730 | * |
6e10c9b9 | 731 | * Return 0 on success, negative value on error. |
ca95a216 | 732 | */ |
6e10c9b9 PP |
733 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
734 | const void *payload_buf, size_t payload_len, | |
735 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 736 | { |
6e10c9b9 PP |
737 | int ret = 0; |
738 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
739 | const size_t cmd_header_offset = header_len; | |
740 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
741 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 742 | |
6e10c9b9 | 743 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 744 | |
5461b305 | 745 | if (cmd_ctx->llm == NULL) { |
76d7553f | 746 | PERROR("zmalloc"); |
5461b305 | 747 | ret = -ENOMEM; |
6e10c9b9 | 748 | goto end; |
ca95a216 DG |
749 | } |
750 | ||
5461b305 DG |
751 | /* Copy common data */ |
752 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 753 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
754 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
755 | cmd_ctx->llm->data_size = payload_len; | |
756 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 757 | |
6e10c9b9 | 758 | /* Copy command header */ |
b4e3ceb9 PP |
759 | if (cmd_header_len) { |
760 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
761 | cmd_header_len); | |
762 | } | |
5461b305 | 763 | |
6e10c9b9 | 764 | /* Copy payload */ |
b4e3ceb9 PP |
765 | if (payload_len) { |
766 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
767 | payload_len); | |
768 | } | |
ca95a216 | 769 | |
6e10c9b9 | 770 | end: |
ca95a216 DG |
771 | return ret; |
772 | } | |
773 | ||
6e10c9b9 PP |
774 | /* |
775 | * Version of setup_lttng_msg() without command header. | |
776 | */ | |
777 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
778 | void *payload_buf, size_t payload_len) | |
779 | { | |
780 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
781 | } | |
7a485870 | 782 | /* |
5eb91c98 | 783 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 784 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 785 | */ |
5eb91c98 | 786 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 787 | { |
5eb91c98 | 788 | int ret; |
7a485870 DG |
789 | struct ltt_session *session; |
790 | struct ltt_kernel_channel *channel; | |
791 | ||
5eb91c98 | 792 | DBG("Updating kernel poll set"); |
7a485870 | 793 | |
54d01ffb | 794 | session_lock_list(); |
b5541356 | 795 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 796 | session_lock(session); |
7a485870 | 797 | if (session->kernel_session == NULL) { |
54d01ffb | 798 | session_unlock(session); |
7a485870 DG |
799 | continue; |
800 | } | |
7a485870 | 801 | |
54d01ffb DG |
802 | cds_list_for_each_entry(channel, |
803 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
804 | /* Add channel fd to the kernel poll set */ |
805 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
806 | if (ret < 0) { | |
54d01ffb | 807 | session_unlock(session); |
5eb91c98 DG |
808 | goto error; |
809 | } | |
810 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 811 | } |
54d01ffb | 812 | session_unlock(session); |
7a485870 | 813 | } |
54d01ffb | 814 | session_unlock_list(); |
7a485870 | 815 | |
5eb91c98 | 816 | return 0; |
7a485870 DG |
817 | |
818 | error: | |
54d01ffb | 819 | session_unlock_list(); |
7a485870 DG |
820 | return -1; |
821 | } | |
822 | ||
823 | /* | |
54d01ffb | 824 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 825 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 826 | * |
d063d709 | 827 | * Useful for CPU hotplug feature. |
7a485870 | 828 | */ |
2bdd86d4 | 829 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
830 | { |
831 | int ret = 0; | |
832 | struct ltt_session *session; | |
173af62f | 833 | struct ltt_kernel_session *ksess; |
7a485870 DG |
834 | struct ltt_kernel_channel *channel; |
835 | ||
836 | DBG("Updating kernel streams for channel fd %d", fd); | |
837 | ||
54d01ffb | 838 | session_lock_list(); |
b5541356 | 839 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 840 | session_lock(session); |
7a485870 | 841 | if (session->kernel_session == NULL) { |
54d01ffb | 842 | session_unlock(session); |
7a485870 DG |
843 | continue; |
844 | } | |
173af62f | 845 | ksess = session->kernel_session; |
d9800920 | 846 | |
4a15001e MD |
847 | cds_list_for_each_entry(channel, |
848 | &ksess->channel_list.head, list) { | |
849 | struct lttng_ht_iter iter; | |
850 | struct consumer_socket *socket; | |
d9800920 | 851 | |
4a15001e MD |
852 | if (channel->fd != fd) { |
853 | continue; | |
854 | } | |
855 | DBG("Channel found, updating kernel streams"); | |
856 | ret = kernel_open_channel_stream(channel); | |
857 | if (ret < 0) { | |
858 | goto error; | |
859 | } | |
860 | /* Update the stream global counter */ | |
861 | ksess->stream_count_global += ret; | |
862 | ||
863 | /* | |
864 | * Have we already sent fds to the consumer? If yes, it | |
865 | * means that tracing is started so it is safe to send | |
866 | * our updated stream fds. | |
867 | */ | |
868 | if (ksess->consumer_fds_sent != 1 | |
869 | || ksess->consumer == NULL) { | |
870 | ret = -1; | |
871 | goto error; | |
872 | } | |
873 | ||
874 | rcu_read_lock(); | |
875 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
876 | &iter.iter, socket, node.node) { | |
877 | pthread_mutex_lock(socket->lock); | |
878 | ret = kernel_consumer_send_channel_stream(socket, | |
879 | channel, ksess, | |
880 | session->output_traces ? 1 : 0); | |
881 | pthread_mutex_unlock(socket->lock); | |
882 | if (ret < 0) { | |
e7fe706f | 883 | rcu_read_unlock(); |
4a15001e | 884 | goto error; |
7a485870 | 885 | } |
7a485870 | 886 | } |
4a15001e | 887 | rcu_read_unlock(); |
7a485870 | 888 | } |
54d01ffb | 889 | session_unlock(session); |
7a485870 | 890 | } |
54d01ffb | 891 | session_unlock_list(); |
b3c750d2 | 892 | return ret; |
7a485870 | 893 | |
b3c750d2 | 894 | error: |
54d01ffb DG |
895 | session_unlock(session); |
896 | session_unlock_list(); | |
7a485870 DG |
897 | return ret; |
898 | } | |
899 | ||
487cf67c | 900 | /* |
ffe60014 DG |
901 | * For each tracing session, update newly registered apps. The session list |
902 | * lock MUST be acquired before calling this. | |
487cf67c DG |
903 | */ |
904 | static void update_ust_app(int app_sock) | |
905 | { | |
906 | struct ltt_session *sess, *stmp; | |
907 | ||
fdadac08 DG |
908 | /* Consumer is in an ERROR state. Stop any application update. */ |
909 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
910 | /* Stop the update process since the consumer is dead. */ | |
911 | return; | |
912 | } | |
913 | ||
487cf67c DG |
914 | /* For all tracing session(s) */ |
915 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
916 | struct ust_app *app; |
917 | ||
4ee14516 | 918 | session_lock(sess); |
a9ad0c8f MD |
919 | if (!sess->ust_session) { |
920 | goto unlock_session; | |
921 | } | |
922 | ||
923 | rcu_read_lock(); | |
924 | assert(app_sock >= 0); | |
925 | app = ust_app_find_by_sock(app_sock); | |
926 | if (app == NULL) { | |
927 | /* | |
928 | * Application can be unregistered before so | |
929 | * this is possible hence simply stopping the | |
930 | * update. | |
931 | */ | |
932 | DBG3("UST app update failed to find app sock %d", | |
933 | app_sock); | |
934 | goto unlock_rcu; | |
421cb601 | 935 | } |
a9ad0c8f MD |
936 | ust_app_global_update(sess->ust_session, app); |
937 | unlock_rcu: | |
938 | rcu_read_unlock(); | |
939 | unlock_session: | |
4ee14516 | 940 | session_unlock(sess); |
487cf67c DG |
941 | } |
942 | } | |
943 | ||
7a485870 | 944 | /* |
d063d709 | 945 | * This thread manage event coming from the kernel. |
7a485870 | 946 | * |
d063d709 DG |
947 | * Features supported in this thread: |
948 | * -) CPU Hotplug | |
7a485870 DG |
949 | */ |
950 | static void *thread_manage_kernel(void *data) | |
951 | { | |
139ac872 | 952 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 953 | uint32_t revents, nb_fd; |
7a485870 | 954 | char tmp; |
5eb91c98 | 955 | struct lttng_poll_event events; |
7a485870 | 956 | |
6993eeb3 | 957 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 958 | |
6c71277b | 959 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 960 | |
d5d63bf1 DG |
961 | /* |
962 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 963 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 964 | */ |
6d737ce4 | 965 | lttng_poll_init(&events); |
d5d63bf1 | 966 | |
e547b070 | 967 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
968 | goto error_testpoint; |
969 | } | |
8ac94142 | 970 | |
840cb59c | 971 | health_code_update(); |
44a5e5eb | 972 | |
e547b070 | 973 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 974 | goto error_testpoint; |
6993eeb3 CB |
975 | } |
976 | ||
7a485870 | 977 | while (1) { |
840cb59c | 978 | health_code_update(); |
44a5e5eb | 979 | |
7a485870 | 980 | if (update_poll_flag == 1) { |
d21b0d71 DG |
981 | /* Clean events object. We are about to populate it again. */ |
982 | lttng_poll_clean(&events); | |
983 | ||
d0b96690 | 984 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
985 | if (ret < 0) { |
986 | goto error_poll_create; | |
987 | } | |
988 | ||
989 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
990 | if (ret < 0) { | |
991 | goto error; | |
992 | } | |
5f822d0a | 993 | |
d21b0d71 | 994 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
995 | ret = update_kernel_poll(&events); |
996 | if (ret < 0) { | |
7a485870 DG |
997 | goto error; |
998 | } | |
999 | update_poll_flag = 0; | |
1000 | } | |
1001 | ||
7fa2082e | 1002 | DBG("Thread kernel polling"); |
7a485870 DG |
1003 | |
1004 | /* Poll infinite value of time */ | |
88f2b785 | 1005 | restart: |
a78af745 | 1006 | health_poll_entry(); |
5eb91c98 | 1007 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1008 | DBG("Thread kernel return from poll on %d fds", |
1009 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1010 | health_poll_exit(); |
7a485870 | 1011 | if (ret < 0) { |
88f2b785 MD |
1012 | /* |
1013 | * Restart interrupted system call. | |
1014 | */ | |
1015 | if (errno == EINTR) { | |
1016 | goto restart; | |
1017 | } | |
7a485870 DG |
1018 | goto error; |
1019 | } else if (ret == 0) { | |
1020 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
1021 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
1022 | "This should not have happened! Continuing..."); | |
7a485870 DG |
1023 | continue; |
1024 | } | |
1025 | ||
0d9c5d77 DG |
1026 | nb_fd = ret; |
1027 | ||
5eb91c98 DG |
1028 | for (i = 0; i < nb_fd; i++) { |
1029 | /* Fetch once the poll data */ | |
1030 | revents = LTTNG_POLL_GETEV(&events, i); | |
1031 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1032 | |
840cb59c | 1033 | health_code_update(); |
44a5e5eb | 1034 | |
fd20dac9 MD |
1035 | if (!revents) { |
1036 | /* No activity for this FD (poll implementation). */ | |
1037 | continue; | |
1038 | } | |
1039 | ||
5eb91c98 | 1040 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1041 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1042 | if (ret) { |
139ac872 MD |
1043 | err = 0; |
1044 | goto exit; | |
5eb91c98 | 1045 | } |
7a485870 | 1046 | |
5eb91c98 | 1047 | /* Check for data on kernel pipe */ |
03e43155 MD |
1048 | if (revents & LPOLLIN) { |
1049 | if (pollfd == kernel_poll_pipe[0]) { | |
1050 | (void) lttng_read(kernel_poll_pipe[0], | |
1051 | &tmp, 1); | |
1052 | /* | |
1053 | * Ret value is useless here, if this pipe gets any actions an | |
1054 | * update is required anyway. | |
1055 | */ | |
1056 | update_poll_flag = 1; | |
1057 | continue; | |
1058 | } else { | |
1059 | /* | |
1060 | * New CPU detected by the kernel. Adding kernel stream to | |
1061 | * kernel session and updating the kernel consumer | |
1062 | */ | |
2bdd86d4 | 1063 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1064 | if (ret < 0) { |
1065 | continue; | |
1066 | } | |
1067 | break; | |
7a485870 | 1068 | } |
03e43155 MD |
1069 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1070 | update_poll_flag = 1; | |
1071 | continue; | |
1072 | } else { | |
1073 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1074 | goto error; | |
7a485870 DG |
1075 | } |
1076 | } | |
1077 | } | |
1078 | ||
139ac872 | 1079 | exit: |
7a485870 | 1080 | error: |
5eb91c98 | 1081 | lttng_poll_clean(&events); |
76d7553f | 1082 | error_poll_create: |
6993eeb3 | 1083 | error_testpoint: |
6620da75 DG |
1084 | utils_close_pipe(kernel_poll_pipe); |
1085 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1086 | if (err) { |
840cb59c | 1087 | health_error(); |
139ac872 | 1088 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1089 | WARN("Kernel thread died unexpectedly. " |
1090 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1091 | } |
8782cc74 | 1092 | health_unregister(health_sessiond); |
76d7553f | 1093 | DBG("Kernel thread dying"); |
7a485870 DG |
1094 | return NULL; |
1095 | } | |
1096 | ||
a23ec3a7 DG |
1097 | /* |
1098 | * Signal pthread condition of the consumer data that the thread. | |
1099 | */ | |
1100 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1101 | { | |
1102 | pthread_mutex_lock(&data->cond_mutex); | |
1103 | ||
1104 | /* | |
1105 | * The state is set before signaling. It can be any value, it's the waiter | |
1106 | * job to correctly interpret this condition variable associated to the | |
1107 | * consumer pthread_cond. | |
1108 | * | |
1109 | * A value of 0 means that the corresponding thread of the consumer data | |
1110 | * was not started. 1 indicates that the thread has started and is ready | |
1111 | * for action. A negative value means that there was an error during the | |
1112 | * thread bootstrap. | |
1113 | */ | |
1114 | data->consumer_thread_is_ready = state; | |
1115 | (void) pthread_cond_signal(&data->cond); | |
1116 | ||
1117 | pthread_mutex_unlock(&data->cond_mutex); | |
1118 | } | |
1119 | ||
1d4b027a | 1120 | /* |
3bd1e081 | 1121 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1122 | */ |
3bd1e081 | 1123 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1124 | { |
42fc1d0b | 1125 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1126 | uint32_t revents, nb_fd; |
1d4b027a | 1127 | enum lttcomm_return_code code; |
5eb91c98 | 1128 | struct lttng_poll_event events; |
3bd1e081 | 1129 | struct consumer_data *consumer_data = data; |
b3530820 | 1130 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 1131 | |
3bd1e081 | 1132 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1133 | |
34c1e15a MD |
1134 | rcu_register_thread(); |
1135 | rcu_thread_online(); | |
1136 | ||
6c71277b | 1137 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1138 | |
855060f8 | 1139 | health_code_update(); |
9449cc75 | 1140 | |
5eb91c98 | 1141 | /* |
331744e3 JD |
1142 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1143 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1144 | */ |
331744e3 | 1145 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1146 | if (ret < 0) { |
76d7553f | 1147 | goto error_poll; |
5eb91c98 | 1148 | } |
273ea72c | 1149 | |
edb8b045 DG |
1150 | /* |
1151 | * The error socket here is already in a listening state which was done | |
1152 | * just before spawning this thread to avoid a race between the consumer | |
1153 | * daemon exec trying to connect and the listen() call. | |
1154 | */ | |
3bd1e081 | 1155 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1156 | if (ret < 0) { |
1157 | goto error; | |
1158 | } | |
1159 | ||
840cb59c | 1160 | health_code_update(); |
44a5e5eb | 1161 | |
331744e3 | 1162 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1163 | restart: |
a78af745 | 1164 | health_poll_entry(); |
8ac94142 | 1165 | |
e547b070 | 1166 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1167 | goto error; |
1168 | } | |
8ac94142 | 1169 | |
5eb91c98 | 1170 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1171 | health_poll_exit(); |
273ea72c | 1172 | if (ret < 0) { |
88f2b785 MD |
1173 | /* |
1174 | * Restart interrupted system call. | |
1175 | */ | |
1176 | if (errno == EINTR) { | |
1177 | goto restart; | |
1178 | } | |
273ea72c DG |
1179 | goto error; |
1180 | } | |
1181 | ||
0d9c5d77 DG |
1182 | nb_fd = ret; |
1183 | ||
5eb91c98 DG |
1184 | for (i = 0; i < nb_fd; i++) { |
1185 | /* Fetch once the poll data */ | |
1186 | revents = LTTNG_POLL_GETEV(&events, i); | |
1187 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1188 | ||
840cb59c | 1189 | health_code_update(); |
44a5e5eb | 1190 | |
fd20dac9 MD |
1191 | if (!revents) { |
1192 | /* No activity for this FD (poll implementation). */ | |
1193 | continue; | |
1194 | } | |
1195 | ||
5eb91c98 | 1196 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1197 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1198 | if (ret) { |
139ac872 MD |
1199 | err = 0; |
1200 | goto exit; | |
5eb91c98 DG |
1201 | } |
1202 | ||
1203 | /* Event on the registration socket */ | |
3bd1e081 | 1204 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1205 | if (revents & LPOLLIN) { |
1206 | continue; | |
1207 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1208 | ERR("consumer err socket poll error"); |
5eb91c98 | 1209 | goto error; |
03e43155 MD |
1210 | } else { |
1211 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1212 | goto error; | |
5eb91c98 DG |
1213 | } |
1214 | } | |
273ea72c DG |
1215 | } |
1216 | ||
3bd1e081 | 1217 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1218 | if (sock < 0) { |
1219 | goto error; | |
1220 | } | |
1221 | ||
b662582b DG |
1222 | /* |
1223 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1224 | * show must go on. | |
1225 | */ | |
1226 | (void) utils_set_fd_cloexec(sock); | |
1227 | ||
840cb59c | 1228 | health_code_update(); |
44a5e5eb | 1229 | |
3bd1e081 | 1230 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1231 | |
712ea556 | 1232 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1233 | ret = lttcomm_recv_unix_sock(sock, &code, |
1234 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1235 | if (ret <= 0) { |
1236 | goto error; | |
1237 | } | |
1238 | ||
840cb59c | 1239 | health_code_update(); |
b3530820 | 1240 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 1241 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1242 | lttcomm_get_readable_code(-code)); |
1243 | goto error; | |
1244 | } | |
1245 | ||
b3530820 JG |
1246 | /* Connect both command and metadata sockets. */ |
1247 | consumer_data->cmd_sock = | |
1248 | lttcomm_connect_unix_sock( | |
1249 | consumer_data->cmd_unix_sock_path); | |
1250 | consumer_data->metadata_fd = | |
1251 | lttcomm_connect_unix_sock( | |
1252 | consumer_data->cmd_unix_sock_path); | |
1253 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
1254 | PERROR("consumer connect cmd socket"); | |
1255 | /* On error, signal condition and quit. */ | |
1256 | signal_consumer_condition(consumer_data, -1); | |
1257 | goto error; | |
1258 | } | |
1259 | ||
1260 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
1261 | ||
1262 | /* Create metadata socket lock. */ | |
1263 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1264 | if (consumer_data->metadata_sock.lock == NULL) { | |
1265 | PERROR("zmalloc pthread mutex"); | |
1266 | goto error; | |
1267 | } | |
1268 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1269 | ||
1270 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
1271 | DBG("Consumer metadata socket ready (fd: %d)", | |
1272 | consumer_data->metadata_fd); | |
1273 | ||
1274 | /* | |
1275 | * Remove the consumerd error sock since we've established a connection. | |
1276 | */ | |
3bd1e081 | 1277 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1278 | if (ret < 0) { |
72079cae DG |
1279 | goto error; |
1280 | } | |
1281 | ||
331744e3 | 1282 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1283 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1284 | if (ret < 0) { | |
72079cae | 1285 | goto error; |
5eb91c98 DG |
1286 | } |
1287 | ||
331744e3 | 1288 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1289 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1290 | LPOLLIN | LPOLLRDHUP); |
1291 | if (ret < 0) { | |
1292 | goto error; | |
1293 | } | |
1294 | ||
840cb59c | 1295 | health_code_update(); |
44a5e5eb | 1296 | |
b3530820 | 1297 | /* |
62c43103 JD |
1298 | * Transfer the write-end of the channel monitoring and rotate pipe |
1299 | * to the consumer by issuing a SET_CHANNEL_MONITOR_PIPE and | |
1300 | * SET_CHANNEL_ROTATE_PIPE commands. | |
b3530820 JG |
1301 | */ |
1302 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
1303 | if (!cmd_socket_wrapper) { | |
1304 | goto error; | |
1305 | } | |
3e4dc117 | 1306 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
1307 | |
1308 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
1309 | consumer_data->channel_monitor_pipe); | |
1310 | if (ret) { | |
1311 | goto error; | |
1312 | } | |
62c43103 JD |
1313 | |
1314 | ret = consumer_send_channel_rotate_pipe(cmd_socket_wrapper, | |
1315 | consumer_data->channel_rotate_pipe); | |
1316 | if (ret) { | |
1317 | goto error; | |
1318 | } | |
1319 | ||
b3530820 JG |
1320 | /* Discard the socket wrapper as it is no longer needed. */ |
1321 | consumer_destroy_socket(cmd_socket_wrapper); | |
1322 | cmd_socket_wrapper = NULL; | |
1323 | ||
1324 | /* The thread is completely initialized, signal that it is ready. */ | |
1325 | signal_consumer_condition(consumer_data, 1); | |
1326 | ||
331744e3 | 1327 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1328 | restart_poll: |
331744e3 | 1329 | while (1) { |
42fc1d0b DG |
1330 | health_code_update(); |
1331 | ||
1332 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1333 | if (should_quit) { | |
1334 | /* Not a health error. */ | |
1335 | err = 0; | |
1336 | goto exit; | |
1337 | } | |
1338 | ||
331744e3 JD |
1339 | health_poll_entry(); |
1340 | ret = lttng_poll_wait(&events, -1); | |
1341 | health_poll_exit(); | |
1342 | if (ret < 0) { | |
1343 | /* | |
1344 | * Restart interrupted system call. | |
1345 | */ | |
1346 | if (errno == EINTR) { | |
1347 | goto restart_poll; | |
1348 | } | |
1349 | goto error; | |
88f2b785 | 1350 | } |
72079cae | 1351 | |
331744e3 | 1352 | nb_fd = ret; |
0d9c5d77 | 1353 | |
331744e3 JD |
1354 | for (i = 0; i < nb_fd; i++) { |
1355 | /* Fetch once the poll data */ | |
1356 | revents = LTTNG_POLL_GETEV(&events, i); | |
1357 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1358 | |
331744e3 | 1359 | health_code_update(); |
44a5e5eb | 1360 | |
fd20dac9 MD |
1361 | if (!revents) { |
1362 | /* No activity for this FD (poll implementation). */ | |
1363 | continue; | |
1364 | } | |
1365 | ||
42fc1d0b DG |
1366 | /* |
1367 | * Thread quit pipe has been triggered, flag that we should stop | |
1368 | * but continue the current loop to handle potential data from | |
1369 | * consumer. | |
1370 | */ | |
1371 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1372 | |
331744e3 JD |
1373 | if (pollfd == sock) { |
1374 | /* Event on the consumerd socket */ | |
03e43155 MD |
1375 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1376 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1377 | ERR("consumer err socket second poll error"); |
1378 | goto error; | |
1379 | } | |
1380 | health_code_update(); | |
1381 | /* Wait for any kconsumerd error */ | |
1382 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1383 | sizeof(enum lttcomm_return_code)); | |
1384 | if (ret <= 0) { | |
1385 | ERR("consumer closed the command socket"); | |
1386 | goto error; | |
1387 | } | |
1388 | ||
1389 | ERR("consumer return code : %s", | |
1390 | lttcomm_get_readable_code(-code)); | |
1391 | ||
1392 | goto exit; | |
4ce514c4 | 1393 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1394 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1395 | && !(revents & LPOLLIN)) { | |
1396 | ERR("consumer err metadata socket second poll error"); | |
1397 | goto error; | |
1398 | } | |
331744e3 JD |
1399 | /* UST metadata requests */ |
1400 | ret = ust_consumer_metadata_request( | |
1401 | &consumer_data->metadata_sock); | |
1402 | if (ret < 0) { | |
1403 | ERR("Handling metadata request"); | |
1404 | goto error; | |
1405 | } | |
5eb91c98 | 1406 | } |
42fc1d0b | 1407 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1408 | } |
331744e3 | 1409 | health_code_update(); |
5eb91c98 DG |
1410 | } |
1411 | ||
139ac872 | 1412 | exit: |
1d4b027a | 1413 | error: |
fdadac08 DG |
1414 | /* |
1415 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1416 | * thread might be using them so get exclusive access which will abort all |
1417 | * other consumer command by other threads. | |
fdadac08 DG |
1418 | */ |
1419 | pthread_mutex_lock(&consumer_data->lock); | |
1420 | ||
5c827ce0 DG |
1421 | /* Immediately set the consumerd state to stopped */ |
1422 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1423 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1424 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1425 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1426 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1427 | } else { | |
1428 | /* Code flow error... */ | |
1429 | assert(0); | |
1430 | } | |
1431 | ||
76d7553f MD |
1432 | if (consumer_data->err_sock >= 0) { |
1433 | ret = close(consumer_data->err_sock); | |
1434 | if (ret) { | |
1435 | PERROR("close"); | |
1436 | } | |
a76cbd9f | 1437 | consumer_data->err_sock = -1; |
76d7553f MD |
1438 | } |
1439 | if (consumer_data->cmd_sock >= 0) { | |
1440 | ret = close(consumer_data->cmd_sock); | |
1441 | if (ret) { | |
1442 | PERROR("close"); | |
1443 | } | |
a76cbd9f | 1444 | consumer_data->cmd_sock = -1; |
76d7553f | 1445 | } |
96544455 SS |
1446 | if (consumer_data->metadata_sock.fd_ptr && |
1447 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1448 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1449 | if (ret) { |
1450 | PERROR("close"); | |
1451 | } | |
1452 | } | |
76d7553f MD |
1453 | if (sock >= 0) { |
1454 | ret = close(sock); | |
1455 | if (ret) { | |
1456 | PERROR("close"); | |
1457 | } | |
1458 | } | |
273ea72c | 1459 | |
3bd1e081 MD |
1460 | unlink(consumer_data->err_unix_sock_path); |
1461 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1462 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1463 | |
fdadac08 | 1464 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1465 | if (consumer_data->metadata_sock.lock) { |
1466 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1467 | free(consumer_data->metadata_sock.lock); | |
1468 | } | |
5eb91c98 | 1469 | lttng_poll_clean(&events); |
b3530820 JG |
1470 | |
1471 | if (cmd_socket_wrapper) { | |
1472 | consumer_destroy_socket(cmd_socket_wrapper); | |
1473 | } | |
76d7553f | 1474 | error_poll: |
139ac872 | 1475 | if (err) { |
840cb59c | 1476 | health_error(); |
139ac872 MD |
1477 | ERR("Health error occurred in %s", __func__); |
1478 | } | |
8782cc74 | 1479 | health_unregister(health_sessiond); |
76d7553f | 1480 | DBG("consumer thread cleanup completed"); |
0177d773 | 1481 | |
34c1e15a MD |
1482 | rcu_thread_offline(); |
1483 | rcu_unregister_thread(); | |
1484 | ||
5eb91c98 | 1485 | return NULL; |
099e26bd DG |
1486 | } |
1487 | ||
099e26bd | 1488 | /* |
81f04d5f JG |
1489 | * This thread receives application command sockets (FDs) on the |
1490 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1491 | * or an error occurs. | |
1492 | * | |
1493 | * At that point, it flushes the data (tracing and metadata) associated | |
1494 | * with this application and tears down ust app sessions and other | |
1495 | * associated data structures through ust_app_unregister(). | |
1496 | * | |
1497 | * Note that this thread never sends commands to the applications | |
1498 | * through the command sockets; it merely listens for hang-ups | |
1499 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1500 | */ |
1501 | static void *thread_manage_apps(void *data) | |
099e26bd | 1502 | { |
139ac872 | 1503 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1504 | ssize_t size_ret; |
5eb91c98 | 1505 | uint32_t revents, nb_fd; |
5eb91c98 | 1506 | struct lttng_poll_event events; |
099e26bd DG |
1507 | |
1508 | DBG("[thread] Manage application started"); | |
1509 | ||
f6a9efaa DG |
1510 | rcu_register_thread(); |
1511 | rcu_thread_online(); | |
1512 | ||
6c71277b | 1513 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1514 | |
e547b070 | 1515 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1516 | goto error_testpoint; |
1517 | } | |
1518 | ||
840cb59c | 1519 | health_code_update(); |
44a5e5eb | 1520 | |
d0b96690 | 1521 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1522 | if (ret < 0) { |
76d7553f | 1523 | goto error_poll_create; |
5eb91c98 | 1524 | } |
099e26bd | 1525 | |
5eb91c98 DG |
1526 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1527 | if (ret < 0) { | |
1528 | goto error; | |
1529 | } | |
099e26bd | 1530 | |
e547b070 | 1531 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1532 | goto error; |
1533 | } | |
8ac94142 | 1534 | |
840cb59c | 1535 | health_code_update(); |
44a5e5eb | 1536 | |
5eb91c98 | 1537 | while (1) { |
7fa2082e | 1538 | DBG("Apps thread polling"); |
099e26bd DG |
1539 | |
1540 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1541 | restart: |
a78af745 | 1542 | health_poll_entry(); |
5eb91c98 | 1543 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1544 | DBG("Apps thread return from poll on %d fds", |
1545 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1546 | health_poll_exit(); |
099e26bd | 1547 | if (ret < 0) { |
88f2b785 MD |
1548 | /* |
1549 | * Restart interrupted system call. | |
1550 | */ | |
1551 | if (errno == EINTR) { | |
1552 | goto restart; | |
1553 | } | |
099e26bd DG |
1554 | goto error; |
1555 | } | |
1556 | ||
0d9c5d77 DG |
1557 | nb_fd = ret; |
1558 | ||
5eb91c98 DG |
1559 | for (i = 0; i < nb_fd; i++) { |
1560 | /* Fetch once the poll data */ | |
1561 | revents = LTTNG_POLL_GETEV(&events, i); | |
1562 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1563 | ||
840cb59c | 1564 | health_code_update(); |
44a5e5eb | 1565 | |
fd20dac9 MD |
1566 | if (!revents) { |
1567 | /* No activity for this FD (poll implementation). */ | |
1568 | continue; | |
1569 | } | |
1570 | ||
5eb91c98 | 1571 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1572 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1573 | if (ret) { |
139ac872 MD |
1574 | err = 0; |
1575 | goto exit; | |
5eb91c98 | 1576 | } |
099e26bd | 1577 | |
5eb91c98 DG |
1578 | /* Inspect the apps cmd pipe */ |
1579 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1580 | if (revents & LPOLLIN) { |
d0b96690 DG |
1581 | int sock; |
1582 | ||
5eb91c98 | 1583 | /* Empty pipe */ |
6cd525e8 MD |
1584 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1585 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1586 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1587 | goto error; |
1588 | } | |
099e26bd | 1589 | |
840cb59c | 1590 | health_code_update(); |
44a5e5eb | 1591 | |
ffe60014 | 1592 | /* |
03e43155 MD |
1593 | * Since this is a command socket (write then read), |
1594 | * we only monitor the error events of the socket. | |
ffe60014 | 1595 | */ |
d0b96690 DG |
1596 | ret = lttng_poll_add(&events, sock, |
1597 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1598 | if (ret < 0) { | |
5eb91c98 | 1599 | goto error; |
e0c7ec2b | 1600 | } |
acc7b41b | 1601 | |
d0b96690 | 1602 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1603 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1604 | ERR("Apps command pipe error"); | |
1605 | goto error; | |
1606 | } else { | |
1607 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1608 | goto error; | |
0177d773 | 1609 | } |
5eb91c98 DG |
1610 | } else { |
1611 | /* | |
54d01ffb DG |
1612 | * At this point, we know that a registered application made |
1613 | * the event at poll_wait. | |
5eb91c98 DG |
1614 | */ |
1615 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1616 | /* Removing from the poll set */ | |
1617 | ret = lttng_poll_del(&events, pollfd); | |
1618 | if (ret < 0) { | |
1619 | goto error; | |
1620 | } | |
099e26bd | 1621 | |
b9d9b220 | 1622 | /* Socket closed on remote end. */ |
56fff090 | 1623 | ust_app_unregister(pollfd); |
03e43155 MD |
1624 | } else { |
1625 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1626 | goto error; | |
5eb91c98 | 1627 | } |
099e26bd | 1628 | } |
44a5e5eb | 1629 | |
840cb59c | 1630 | health_code_update(); |
099e26bd | 1631 | } |
099e26bd DG |
1632 | } |
1633 | ||
139ac872 | 1634 | exit: |
099e26bd | 1635 | error: |
5eb91c98 | 1636 | lttng_poll_clean(&events); |
76d7553f | 1637 | error_poll_create: |
6993eeb3 | 1638 | error_testpoint: |
6620da75 DG |
1639 | utils_close_pipe(apps_cmd_pipe); |
1640 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1641 | ||
1642 | /* | |
1643 | * We don't clean the UST app hash table here since already registered | |
1644 | * applications can still be controlled so let them be until the session | |
1645 | * daemon dies or the applications stop. | |
1646 | */ | |
1647 | ||
139ac872 | 1648 | if (err) { |
840cb59c | 1649 | health_error(); |
139ac872 MD |
1650 | ERR("Health error occurred in %s", __func__); |
1651 | } | |
8782cc74 | 1652 | health_unregister(health_sessiond); |
76d7553f | 1653 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1654 | rcu_thread_offline(); |
1655 | rcu_unregister_thread(); | |
099e26bd DG |
1656 | return NULL; |
1657 | } | |
1658 | ||
d0b96690 | 1659 | /* |
d88aee68 DG |
1660 | * Send a socket to a thread This is called from the dispatch UST registration |
1661 | * thread once all sockets are set for the application. | |
d0b96690 | 1662 | * |
b85dc84c DG |
1663 | * The sock value can be invalid, we don't really care, the thread will handle |
1664 | * it and make the necessary cleanup if so. | |
1665 | * | |
d0b96690 DG |
1666 | * On success, return 0 else a negative value being the errno message of the |
1667 | * write(). | |
1668 | */ | |
d88aee68 | 1669 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1670 | { |
6cd525e8 | 1671 | ssize_t ret; |
d0b96690 | 1672 | |
b85dc84c DG |
1673 | /* |
1674 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1675 | * before calling this function being a shutdown state of the thread. | |
1676 | */ | |
1677 | if (fd < 0) { | |
1678 | ret = -EBADF; | |
1679 | goto error; | |
1680 | } | |
d0b96690 | 1681 | |
6cd525e8 MD |
1682 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1683 | if (ret < sizeof(sock)) { | |
d88aee68 | 1684 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1685 | if (ret < 0) { |
1686 | ret = -errno; | |
1687 | } | |
1688 | goto error; | |
1689 | } | |
1690 | ||
1691 | /* All good. Don't send back the write positive ret value. */ | |
1692 | ret = 0; | |
1693 | error: | |
6cd525e8 | 1694 | return (int) ret; |
d0b96690 DG |
1695 | } |
1696 | ||
f45e313d DG |
1697 | /* |
1698 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1699 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1700 | * notify socket is never received. | |
1701 | */ | |
1702 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1703 | { | |
1704 | int ret, nb_fd = 0, i; | |
1705 | unsigned int fd_added = 0; | |
1706 | struct lttng_poll_event events; | |
1707 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1708 | ||
1709 | assert(wait_queue); | |
1710 | ||
1711 | lttng_poll_init(&events); | |
1712 | ||
1713 | /* Just skip everything for an empty queue. */ | |
1714 | if (!wait_queue->count) { | |
1715 | goto end; | |
1716 | } | |
1717 | ||
1718 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1719 | if (ret < 0) { | |
1720 | goto error_create; | |
1721 | } | |
1722 | ||
1723 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1724 | &wait_queue->head, head) { | |
1725 | assert(wait_node->app); | |
1726 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1727 | LPOLLHUP | LPOLLERR); | |
1728 | if (ret < 0) { | |
1729 | goto error; | |
1730 | } | |
1731 | ||
1732 | fd_added = 1; | |
1733 | } | |
1734 | ||
1735 | if (!fd_added) { | |
1736 | goto end; | |
1737 | } | |
1738 | ||
1739 | /* | |
1740 | * Poll but don't block so we can quickly identify the faulty events and | |
1741 | * clean them afterwards from the wait queue. | |
1742 | */ | |
1743 | ret = lttng_poll_wait(&events, 0); | |
1744 | if (ret < 0) { | |
1745 | goto error; | |
1746 | } | |
1747 | nb_fd = ret; | |
1748 | ||
1749 | for (i = 0; i < nb_fd; i++) { | |
1750 | /* Get faulty FD. */ | |
1751 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1752 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1753 | ||
fd20dac9 MD |
1754 | if (!revents) { |
1755 | /* No activity for this FD (poll implementation). */ | |
1756 | continue; | |
1757 | } | |
1758 | ||
f45e313d DG |
1759 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1760 | &wait_queue->head, head) { | |
1761 | if (pollfd == wait_node->app->sock && | |
1762 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1763 | cds_list_del(&wait_node->head); | |
1764 | wait_queue->count--; | |
1765 | ust_app_destroy(wait_node->app); | |
1766 | free(wait_node); | |
48b40bcf JG |
1767 | /* |
1768 | * Silence warning of use-after-free in | |
1769 | * cds_list_for_each_entry_safe which uses | |
1770 | * __typeof__(*wait_node). | |
1771 | */ | |
1772 | wait_node = NULL; | |
f45e313d | 1773 | break; |
03e43155 MD |
1774 | } else { |
1775 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1776 | goto error; | |
f45e313d DG |
1777 | } |
1778 | } | |
1779 | } | |
1780 | ||
1781 | if (nb_fd > 0) { | |
1782 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1783 | } | |
1784 | ||
1785 | end: | |
1786 | lttng_poll_clean(&events); | |
1787 | return; | |
1788 | ||
1789 | error: | |
1790 | lttng_poll_clean(&events); | |
1791 | error_create: | |
1792 | ERR("Unable to sanitize wait queue"); | |
1793 | return; | |
1794 | } | |
1795 | ||
099e26bd DG |
1796 | /* |
1797 | * Dispatch request from the registration threads to the application | |
1798 | * communication thread. | |
1799 | */ | |
1800 | static void *thread_dispatch_ust_registration(void *data) | |
1801 | { | |
12e2b881 | 1802 | int ret, err = -1; |
8bdee6e2 | 1803 | struct cds_wfcq_node *node; |
099e26bd | 1804 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1805 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1806 | struct ust_reg_wait_queue wait_queue = { | |
1807 | .count = 0, | |
1808 | }; | |
d0b96690 | 1809 | |
967e3668 MD |
1810 | rcu_register_thread(); |
1811 | ||
6c71277b | 1812 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1813 | |
9ad42ec1 MD |
1814 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1815 | goto error_testpoint; | |
1816 | } | |
1817 | ||
12e2b881 MD |
1818 | health_code_update(); |
1819 | ||
f45e313d | 1820 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1821 | |
1822 | DBG("[thread] Dispatch UST command started"); | |
1823 | ||
0ed3b1a8 | 1824 | for (;;) { |
12e2b881 MD |
1825 | health_code_update(); |
1826 | ||
099e26bd DG |
1827 | /* Atomically prepare the queue futex */ |
1828 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1829 | ||
0ed3b1a8 MD |
1830 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1831 | break; | |
1832 | } | |
1833 | ||
099e26bd | 1834 | do { |
d0b96690 | 1835 | struct ust_app *app = NULL; |
7972aab2 | 1836 | ust_cmd = NULL; |
d0b96690 | 1837 | |
f45e313d DG |
1838 | /* |
1839 | * Make sure we don't have node(s) that have hung up before receiving | |
1840 | * the notify socket. This is to clean the list in order to avoid | |
1841 | * memory leaks from notify socket that are never seen. | |
1842 | */ | |
1843 | sanitize_wait_queue(&wait_queue); | |
1844 | ||
12e2b881 | 1845 | health_code_update(); |
099e26bd | 1846 | /* Dequeue command for registration */ |
8bdee6e2 | 1847 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1848 | if (node == NULL) { |
00a17c97 | 1849 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1850 | /* Continue thread execution */ |
1851 | break; | |
1852 | } | |
1853 | ||
1854 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1855 | ||
2f50c8a3 DG |
1856 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1857 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1858 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1859 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1860 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1861 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1862 | |
1863 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1864 | wait_node = zmalloc(sizeof(*wait_node)); | |
1865 | if (!wait_node) { | |
1866 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1867 | ret = close(ust_cmd->sock); |
1868 | if (ret < 0) { | |
1869 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1870 | } | |
51dec90d | 1871 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1872 | free(ust_cmd); |
d0b96690 DG |
1873 | goto error; |
1874 | } | |
1875 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1876 | ||
1877 | /* Create application object if socket is CMD. */ | |
1878 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1879 | ust_cmd->sock); | |
1880 | if (!wait_node->app) { | |
1881 | ret = close(ust_cmd->sock); | |
1882 | if (ret < 0) { | |
1883 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1884 | } |
51dec90d | 1885 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1886 | free(wait_node); |
7972aab2 | 1887 | free(ust_cmd); |
d0b96690 DG |
1888 | continue; |
1889 | } | |
1890 | /* | |
1891 | * Add application to the wait queue so we can set the notify | |
1892 | * socket before putting this object in the global ht. | |
1893 | */ | |
f45e313d DG |
1894 | cds_list_add(&wait_node->head, &wait_queue.head); |
1895 | wait_queue.count++; | |
d0b96690 | 1896 | |
7972aab2 | 1897 | free(ust_cmd); |
d0b96690 DG |
1898 | /* |
1899 | * We have to continue here since we don't have the notify | |
1900 | * socket and the application MUST be added to the hash table | |
1901 | * only at that moment. | |
1902 | */ | |
1903 | continue; | |
1904 | } else { | |
1905 | /* | |
1906 | * Look for the application in the local wait queue and set the | |
1907 | * notify socket if found. | |
1908 | */ | |
d88aee68 | 1909 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1910 | &wait_queue.head, head) { |
12e2b881 | 1911 | health_code_update(); |
d0b96690 DG |
1912 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1913 | wait_node->app->notify_sock = ust_cmd->sock; | |
1914 | cds_list_del(&wait_node->head); | |
f45e313d | 1915 | wait_queue.count--; |
d0b96690 DG |
1916 | app = wait_node->app; |
1917 | free(wait_node); | |
1918 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1919 | break; | |
1920 | } | |
1921 | } | |
020d7f60 DG |
1922 | |
1923 | /* | |
1924 | * With no application at this stage the received socket is | |
1925 | * basically useless so close it before we free the cmd data | |
1926 | * structure for good. | |
1927 | */ | |
1928 | if (!app) { | |
1929 | ret = close(ust_cmd->sock); | |
1930 | if (ret < 0) { | |
1931 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1932 | } | |
51dec90d | 1933 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1934 | } |
7972aab2 | 1935 | free(ust_cmd); |
d0b96690 DG |
1936 | } |
1937 | ||
1938 | if (app) { | |
d0b96690 DG |
1939 | /* |
1940 | * @session_lock_list | |
1941 | * | |
1942 | * Lock the global session list so from the register up to the | |
1943 | * registration done message, no thread can see the application | |
1944 | * and change its state. | |
1945 | */ | |
1946 | session_lock_list(); | |
1947 | rcu_read_lock(); | |
d88aee68 | 1948 | |
d0b96690 DG |
1949 | /* |
1950 | * Add application to the global hash table. This needs to be | |
1951 | * done before the update to the UST registry can locate the | |
1952 | * application. | |
1953 | */ | |
1954 | ust_app_add(app); | |
d88aee68 DG |
1955 | |
1956 | /* Set app version. This call will print an error if needed. */ | |
1957 | (void) ust_app_version(app); | |
1958 | ||
1959 | /* Send notify socket through the notify pipe. */ | |
1960 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1961 | app->notify_sock); | |
1962 | if (ret < 0) { | |
1963 | rcu_read_unlock(); | |
1964 | session_unlock_list(); | |
b85dc84c DG |
1965 | /* |
1966 | * No notify thread, stop the UST tracing. However, this is | |
1967 | * not an internal error of the this thread thus setting | |
1968 | * the health error code to a normal exit. | |
1969 | */ | |
1970 | err = 0; | |
d88aee68 | 1971 | goto error; |
6620da75 | 1972 | } |
d88aee68 | 1973 | |
d0b96690 DG |
1974 | /* |
1975 | * Update newly registered application with the tracing | |
1976 | * registry info already enabled information. | |
1977 | */ | |
1978 | update_ust_app(app->sock); | |
d88aee68 DG |
1979 | |
1980 | /* | |
1981 | * Don't care about return value. Let the manage apps threads | |
1982 | * handle app unregistration upon socket close. | |
1983 | */ | |
fb45065e | 1984 | (void) ust_app_register_done(app); |
d88aee68 DG |
1985 | |
1986 | /* | |
1987 | * Even if the application socket has been closed, send the app | |
1988 | * to the thread and unregistration will take place at that | |
1989 | * place. | |
1990 | */ | |
1991 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1992 | if (ret < 0) { |
d88aee68 DG |
1993 | rcu_read_unlock(); |
1994 | session_unlock_list(); | |
b85dc84c DG |
1995 | /* |
1996 | * No apps. thread, stop the UST tracing. However, this is | |
1997 | * not an internal error of the this thread thus setting | |
1998 | * the health error code to a normal exit. | |
1999 | */ | |
2000 | err = 0; | |
d88aee68 | 2001 | goto error; |
d0b96690 | 2002 | } |
d88aee68 | 2003 | |
d0b96690 DG |
2004 | rcu_read_unlock(); |
2005 | session_unlock_list(); | |
099e26bd | 2006 | } |
099e26bd DG |
2007 | } while (node != NULL); |
2008 | ||
12e2b881 | 2009 | health_poll_entry(); |
099e26bd DG |
2010 | /* Futex wait on queue. Blocking call on futex() */ |
2011 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 2012 | health_poll_exit(); |
099e26bd | 2013 | } |
12e2b881 MD |
2014 | /* Normal exit, no error */ |
2015 | err = 0; | |
099e26bd DG |
2016 | |
2017 | error: | |
d88aee68 DG |
2018 | /* Clean up wait queue. */ |
2019 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 2020 | &wait_queue.head, head) { |
d88aee68 | 2021 | cds_list_del(&wait_node->head); |
f45e313d | 2022 | wait_queue.count--; |
d88aee68 DG |
2023 | free(wait_node); |
2024 | } | |
2025 | ||
772b8f4d MD |
2026 | /* Empty command queue. */ |
2027 | for (;;) { | |
2028 | /* Dequeue command for registration */ | |
2029 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
2030 | if (node == NULL) { | |
2031 | break; | |
2032 | } | |
2033 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
2034 | ret = close(ust_cmd->sock); | |
2035 | if (ret < 0) { | |
2036 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2037 | } | |
2038 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2039 | free(ust_cmd); | |
2040 | } | |
2041 | ||
9ad42ec1 | 2042 | error_testpoint: |
099e26bd | 2043 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2044 | if (err) { |
2045 | health_error(); | |
2046 | ERR("Health error occurred in %s", __func__); | |
2047 | } | |
8782cc74 | 2048 | health_unregister(health_sessiond); |
967e3668 | 2049 | rcu_unregister_thread(); |
099e26bd DG |
2050 | return NULL; |
2051 | } | |
2052 | ||
2053 | /* | |
2054 | * This thread manage application registration. | |
2055 | */ | |
2056 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2057 | { |
139ac872 | 2058 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2059 | uint32_t revents, nb_fd; |
2060 | struct lttng_poll_event events; | |
099e26bd DG |
2061 | /* |
2062 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2063 | * freed in the manage apps thread. | |
2064 | */ | |
2065 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2066 | |
099e26bd | 2067 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2068 | |
6c71277b | 2069 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2070 | |
e547b070 | 2071 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2072 | goto error_testpoint; |
2073 | } | |
8ac94142 | 2074 | |
1d4b027a DG |
2075 | ret = lttcomm_listen_unix_sock(apps_sock); |
2076 | if (ret < 0) { | |
76d7553f | 2077 | goto error_listen; |
1d4b027a DG |
2078 | } |
2079 | ||
5eb91c98 DG |
2080 | /* |
2081 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2082 | * more will be added to this poll set. | |
2083 | */ | |
d0b96690 | 2084 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2085 | if (ret < 0) { |
76d7553f | 2086 | goto error_create_poll; |
5eb91c98 | 2087 | } |
273ea72c | 2088 | |
5eb91c98 DG |
2089 | /* Add the application registration socket */ |
2090 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2091 | if (ret < 0) { | |
76d7553f | 2092 | goto error_poll_add; |
5eb91c98 | 2093 | } |
273ea72c | 2094 | |
1d4b027a | 2095 | /* Notify all applications to register */ |
0fdd1e2c DG |
2096 | ret = notify_ust_apps(1); |
2097 | if (ret < 0) { | |
2098 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2099 | "Execution continues but there might be problem for already\n" |
2100 | "running applications that wishes to register."); | |
0fdd1e2c | 2101 | } |
1d4b027a DG |
2102 | |
2103 | while (1) { | |
2104 | DBG("Accepting application registration"); | |
273ea72c DG |
2105 | |
2106 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2107 | restart: |
a78af745 | 2108 | health_poll_entry(); |
5eb91c98 | 2109 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2110 | health_poll_exit(); |
273ea72c | 2111 | if (ret < 0) { |
88f2b785 MD |
2112 | /* |
2113 | * Restart interrupted system call. | |
2114 | */ | |
2115 | if (errno == EINTR) { | |
2116 | goto restart; | |
2117 | } | |
273ea72c DG |
2118 | goto error; |
2119 | } | |
2120 | ||
0d9c5d77 DG |
2121 | nb_fd = ret; |
2122 | ||
5eb91c98 | 2123 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2124 | health_code_update(); |
139ac872 | 2125 | |
5eb91c98 DG |
2126 | /* Fetch once the poll data */ |
2127 | revents = LTTNG_POLL_GETEV(&events, i); | |
2128 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2129 | |
fd20dac9 MD |
2130 | if (!revents) { |
2131 | /* No activity for this FD (poll implementation). */ | |
2132 | continue; | |
2133 | } | |
2134 | ||
5eb91c98 | 2135 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2136 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2137 | if (ret) { |
139ac872 MD |
2138 | err = 0; |
2139 | goto exit; | |
90014c57 | 2140 | } |
1d4b027a | 2141 | |
5eb91c98 DG |
2142 | /* Event on the registration socket */ |
2143 | if (pollfd == apps_sock) { | |
03e43155 | 2144 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2145 | sock = lttcomm_accept_unix_sock(apps_sock); |
2146 | if (sock < 0) { | |
2147 | goto error; | |
2148 | } | |
099e26bd | 2149 | |
16c5c8fa DG |
2150 | /* |
2151 | * Set socket timeout for both receiving and ending. | |
2152 | * app_socket_timeout is in seconds, whereas | |
2153 | * lttcomm_setsockopt_rcv_timeout and | |
2154 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2155 | * parameter. | |
2156 | */ | |
e6142f2e | 2157 | if (config.app_socket_timeout >= 0) { |
28ce0ff2 | 2158 | (void) lttcomm_setsockopt_rcv_timeout(sock, |
e6142f2e | 2159 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2160 | (void) lttcomm_setsockopt_snd_timeout(sock, |
e6142f2e | 2161 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2162 | } |
16c5c8fa | 2163 | |
b662582b DG |
2164 | /* |
2165 | * Set the CLOEXEC flag. Return code is useless because | |
2166 | * either way, the show must go on. | |
2167 | */ | |
2168 | (void) utils_set_fd_cloexec(sock); | |
2169 | ||
5eb91c98 | 2170 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2171 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2172 | if (ust_cmd == NULL) { |
76d7553f | 2173 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2174 | ret = close(sock); |
2175 | if (ret) { | |
2176 | PERROR("close"); | |
2177 | } | |
5eb91c98 DG |
2178 | goto error; |
2179 | } | |
1d4b027a | 2180 | |
5eb91c98 DG |
2181 | /* |
2182 | * Using message-based transmissions to ensure we don't | |
2183 | * have to deal with partially received messages. | |
2184 | */ | |
4063050c MD |
2185 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2186 | if (ret < 0) { | |
2187 | ERR("Exhausted file descriptors allowed for applications."); | |
2188 | free(ust_cmd); | |
2189 | ret = close(sock); | |
2190 | if (ret) { | |
2191 | PERROR("close"); | |
2192 | } | |
2193 | sock = -1; | |
2194 | continue; | |
2195 | } | |
d88aee68 | 2196 | |
840cb59c | 2197 | health_code_update(); |
d0b96690 DG |
2198 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2199 | if (ret < 0) { | |
5eb91c98 | 2200 | free(ust_cmd); |
d0b96690 | 2201 | /* Close socket of the application. */ |
76d7553f MD |
2202 | ret = close(sock); |
2203 | if (ret) { | |
2204 | PERROR("close"); | |
2205 | } | |
4063050c | 2206 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2207 | sock = -1; |
5eb91c98 DG |
2208 | continue; |
2209 | } | |
840cb59c | 2210 | health_code_update(); |
099e26bd | 2211 | |
5eb91c98 | 2212 | ust_cmd->sock = sock; |
34a2494f | 2213 | sock = -1; |
099e26bd | 2214 | |
5eb91c98 DG |
2215 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2216 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2217 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2218 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2219 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2220 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2221 | |
5eb91c98 DG |
2222 | /* |
2223 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2224 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2225 | */ |
8bdee6e2 | 2226 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2227 | |
2228 | /* | |
2229 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2230 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2231 | */ |
2232 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2233 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2234 | ERR("Register apps socket poll error"); | |
2235 | goto error; | |
2236 | } else { | |
2237 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2238 | goto error; | |
5eb91c98 DG |
2239 | } |
2240 | } | |
90014c57 | 2241 | } |
1d4b027a DG |
2242 | } |
2243 | ||
139ac872 | 2244 | exit: |
1d4b027a | 2245 | error: |
0fdd1e2c DG |
2246 | /* Notify that the registration thread is gone */ |
2247 | notify_ust_apps(0); | |
2248 | ||
a4b35e07 | 2249 | if (apps_sock >= 0) { |
76d7553f MD |
2250 | ret = close(apps_sock); |
2251 | if (ret) { | |
2252 | PERROR("close"); | |
2253 | } | |
a4b35e07 | 2254 | } |
46c3f085 | 2255 | if (sock >= 0) { |
76d7553f MD |
2256 | ret = close(sock); |
2257 | if (ret) { | |
2258 | PERROR("close"); | |
2259 | } | |
4063050c | 2260 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2261 | } |
e6142f2e | 2262 | unlink(config.apps_unix_sock_path.value); |
0fdd1e2c | 2263 | |
76d7553f | 2264 | error_poll_add: |
5eb91c98 | 2265 | lttng_poll_clean(&events); |
76d7553f MD |
2266 | error_listen: |
2267 | error_create_poll: | |
6993eeb3 | 2268 | error_testpoint: |
76d7553f | 2269 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2270 | if (err) { |
2271 | health_error(); | |
2272 | ERR("Health error occurred in %s", __func__); | |
2273 | } | |
8782cc74 | 2274 | health_unregister(health_sessiond); |
5eb91c98 | 2275 | |
1d4b027a DG |
2276 | return NULL; |
2277 | } | |
2278 | ||
8c0faa1d | 2279 | /* |
3bd1e081 | 2280 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2281 | * exec or it will fails. |
8c0faa1d | 2282 | */ |
3bd1e081 | 2283 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2284 | { |
a23ec3a7 | 2285 | int ret, clock_ret; |
ee0b0061 DG |
2286 | struct timespec timeout; |
2287 | ||
13a7bce3 JG |
2288 | /* |
2289 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2290 | * This access to consumer_thread_is_ready does not need to be | |
2291 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2292 | * management thread has not been started at this point. | |
2293 | */ | |
a23ec3a7 | 2294 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2295 | |
a23ec3a7 DG |
2296 | /* Setup pthread condition */ |
2297 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2298 | if (ret) { |
a23ec3a7 DG |
2299 | errno = ret; |
2300 | PERROR("pthread_condattr_init consumer data"); | |
2301 | goto error; | |
2302 | } | |
2303 | ||
2304 | /* | |
2305 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2306 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2307 | * for a more details and how we noticed it. | |
2308 | */ | |
2309 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2310 | if (ret) { |
a23ec3a7 DG |
2311 | errno = ret; |
2312 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2313 | goto error; |
2314 | } | |
8c0faa1d | 2315 | |
a23ec3a7 | 2316 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2317 | if (ret) { |
a23ec3a7 DG |
2318 | errno = ret; |
2319 | PERROR("pthread_cond_init consumer data"); | |
2320 | goto error; | |
2321 | } | |
2322 | ||
1a1a34b4 MJ |
2323 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2324 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2325 | if (ret) { |
2326 | errno = ret; | |
3bd1e081 | 2327 | PERROR("pthread_create consumer"); |
ee0b0061 | 2328 | ret = -1; |
8c0faa1d DG |
2329 | goto error; |
2330 | } | |
2331 | ||
a23ec3a7 DG |
2332 | /* We are about to wait on a pthread condition */ |
2333 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2334 | ||
ee0b0061 | 2335 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2336 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2337 | /* |
2338 | * Set the timeout for the condition timed wait even if the clock gettime | |
2339 | * call fails since we might loop on that call and we want to avoid to | |
2340 | * increment the timeout too many times. | |
2341 | */ | |
2342 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2343 | ||
2344 | /* | |
2345 | * The following loop COULD be skipped in some conditions so this is why we | |
2346 | * set ret to 0 in order to make sure at least one round of the loop is | |
2347 | * done. | |
2348 | */ | |
2349 | ret = 0; | |
2350 | ||
2351 | /* | |
2352 | * Loop until the condition is reached or when a timeout is reached. Note | |
2353 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2354 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2355 | * possible. This loop does not take any chances and works with both of | |
2356 | * them. | |
2357 | */ | |
2358 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2359 | if (clock_ret < 0) { | |
2360 | PERROR("clock_gettime spawn consumer"); | |
2361 | /* Infinite wait for the consumerd thread to be ready */ | |
2362 | ret = pthread_cond_wait(&consumer_data->cond, | |
2363 | &consumer_data->cond_mutex); | |
2364 | } else { | |
2365 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2366 | &consumer_data->cond_mutex, &timeout); | |
2367 | } | |
ee0b0061 | 2368 | } |
8c0faa1d | 2369 | |
a23ec3a7 DG |
2370 | /* Release the pthread condition */ |
2371 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2372 | ||
2373 | if (ret != 0) { | |
2374 | errno = ret; | |
2375 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2376 | int pth_ret; |
2377 | ||
ee0b0061 DG |
2378 | /* |
2379 | * Call has timed out so we kill the kconsumerd_thread and return | |
2380 | * an error. | |
2381 | */ | |
a23ec3a7 DG |
2382 | ERR("Condition timed out. The consumer thread was never ready." |
2383 | " Killing it"); | |
4282f9a3 DG |
2384 | pth_ret = pthread_cancel(consumer_data->thread); |
2385 | if (pth_ret < 0) { | |
3bd1e081 | 2386 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2387 | } |
2388 | } else { | |
a23ec3a7 | 2389 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2390 | } |
4282f9a3 DG |
2391 | /* Caller is expecting a negative value on failure. */ |
2392 | ret = -1; | |
ee0b0061 DG |
2393 | goto error; |
2394 | } | |
2395 | ||
3bd1e081 MD |
2396 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2397 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2398 | ERR("Consumerd did not start"); |
3bd1e081 | 2399 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2400 | goto error; |
2401 | } | |
3bd1e081 | 2402 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2403 | |
8c0faa1d DG |
2404 | return 0; |
2405 | ||
2406 | error: | |
2407 | return ret; | |
2408 | } | |
2409 | ||
d9800920 | 2410 | /* |
3bd1e081 | 2411 | * Join consumer thread |
d9800920 | 2412 | */ |
3bd1e081 | 2413 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2414 | { |
2415 | void *status; | |
cf3af59e | 2416 | |
e8209f6b DG |
2417 | /* Consumer pid must be a real one. */ |
2418 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2419 | int ret; |
3bd1e081 | 2420 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2421 | if (ret) { |
4a15001e | 2422 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2423 | return ret; |
2424 | } | |
3bd1e081 | 2425 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2426 | } else { |
2427 | return 0; | |
2428 | } | |
2429 | } | |
2430 | ||
8c0faa1d | 2431 | /* |
3bd1e081 | 2432 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2433 | * |
d063d709 | 2434 | * Return pid if successful else -1. |
8c0faa1d | 2435 | */ |
3bd1e081 | 2436 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2437 | { |
2438 | int ret; | |
2439 | pid_t pid; | |
94c55f17 | 2440 | const char *consumer_to_use; |
53086306 | 2441 | const char *verbosity; |
94c55f17 | 2442 | struct stat st; |
8c0faa1d | 2443 | |
3bd1e081 | 2444 | DBG("Spawning consumerd"); |
c49dc785 | 2445 | |
8c0faa1d DG |
2446 | pid = fork(); |
2447 | if (pid == 0) { | |
2448 | /* | |
3bd1e081 | 2449 | * Exec consumerd. |
8c0faa1d | 2450 | */ |
e6142f2e | 2451 | if (config.verbose_consumer) { |
53086306 | 2452 | verbosity = "--verbose"; |
4421f712 | 2453 | } else if (lttng_opt_quiet) { |
53086306 | 2454 | verbosity = "--quiet"; |
4421f712 DG |
2455 | } else { |
2456 | verbosity = ""; | |
53086306 | 2457 | } |
4421f712 | 2458 | |
3bd1e081 MD |
2459 | switch (consumer_data->type) { |
2460 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2461 | /* |
c7704d57 DG |
2462 | * Find out which consumerd to execute. We will first try the |
2463 | * 64-bit path, then the sessiond's installation directory, and | |
2464 | * fallback on the 32-bit one, | |
94c55f17 | 2465 | */ |
63a799e8 | 2466 | DBG3("Looking for a kernel consumer at these locations:"); |
59ee5091 | 2467 | DBG3(" 1) %s", config.consumerd64_bin_path.value ? : "NULL"); |
e6142f2e | 2468 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); |
59ee5091 | 2469 | DBG3(" 3) %s", config.consumerd32_bin_path.value ? : "NULL"); |
e6142f2e | 2470 | if (stat(config.consumerd64_bin_path.value, &st) == 0) { |
63a799e8 | 2471 | DBG3("Found location #1"); |
e6142f2e JG |
2472 | consumer_to_use = config.consumerd64_bin_path.value; |
2473 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { | |
63a799e8 | 2474 | DBG3("Found location #2"); |
e6142f2e JG |
2475 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; |
2476 | } else if (stat(config.consumerd32_bin_path.value, &st) == 0) { | |
63a799e8 | 2477 | DBG3("Found location #3"); |
e6142f2e | 2478 | consumer_to_use = config.consumerd32_bin_path.value; |
94c55f17 | 2479 | } else { |
63a799e8 | 2480 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2481 | ret = -EINVAL; |
3d678709 | 2482 | goto error; |
94c55f17 AM |
2483 | } |
2484 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
6e2cc8d8 | 2485 | (void) execl(consumer_to_use, |
94c55f17 AM |
2486 | "lttng-consumerd", verbosity, "-k", |
2487 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2488 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2489 | "--group", config.tracing_group_name.value, |
94c55f17 | 2490 | NULL); |
3bd1e081 | 2491 | break; |
7753dea8 MD |
2492 | case LTTNG_CONSUMER64_UST: |
2493 | { | |
46b23495 | 2494 | if (config.consumerd64_lib_dir.value) { |
8f4905da MD |
2495 | char *tmp; |
2496 | size_t tmplen; | |
ddaec4a2 | 2497 | char *tmpnew; |
8f4905da | 2498 | |
e8fa9fb0 | 2499 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2500 | if (!tmp) { |
2501 | tmp = ""; | |
2502 | } | |
d222983e | 2503 | tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2504 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2505 | if (!tmpnew) { | |
2506 | ret = -ENOMEM; | |
2507 | goto error; | |
2508 | } | |
e6142f2e | 2509 | strcat(tmpnew, config.consumerd64_lib_dir.value); |
8f4905da MD |
2510 | if (tmp[0] != '\0') { |
2511 | strcat(tmpnew, ":"); | |
2512 | strcat(tmpnew, tmp); | |
2513 | } | |
d222983e | 2514 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2515 | free(tmpnew); |
8f4905da MD |
2516 | if (ret) { |
2517 | ret = -errno; | |
2518 | goto error; | |
2519 | } | |
2520 | } | |
e6142f2e JG |
2521 | DBG("Using 64-bit UST consumer at: %s", config.consumerd64_bin_path.value); |
2522 | (void) execl(config.consumerd64_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2523 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2524 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2525 | "--group", config.tracing_group_name.value, |
7753dea8 | 2526 | NULL); |
3bd1e081 | 2527 | break; |
7753dea8 MD |
2528 | } |
2529 | case LTTNG_CONSUMER32_UST: | |
2530 | { | |
46b23495 | 2531 | if (config.consumerd32_lib_dir.value) { |
8f4905da MD |
2532 | char *tmp; |
2533 | size_t tmplen; | |
ddaec4a2 | 2534 | char *tmpnew; |
8f4905da | 2535 | |
e8fa9fb0 | 2536 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2537 | if (!tmp) { |
2538 | tmp = ""; | |
2539 | } | |
d222983e | 2540 | tmplen = strlen(config.consumerd32_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2541 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2542 | if (!tmpnew) { | |
2543 | ret = -ENOMEM; | |
2544 | goto error; | |
2545 | } | |
e6142f2e | 2546 | strcat(tmpnew, config.consumerd32_lib_dir.value); |
8f4905da MD |
2547 | if (tmp[0] != '\0') { |
2548 | strcat(tmpnew, ":"); | |
2549 | strcat(tmpnew, tmp); | |
2550 | } | |
d222983e | 2551 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2552 | free(tmpnew); |
8f4905da MD |
2553 | if (ret) { |
2554 | ret = -errno; | |
2555 | goto error; | |
2556 | } | |
2557 | } | |
e6142f2e JG |
2558 | DBG("Using 32-bit UST consumer at: %s", config.consumerd32_bin_path.value); |
2559 | (void) execl(config.consumerd32_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2560 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2561 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2562 | "--group", config.tracing_group_name.value, |
7753dea8 MD |
2563 | NULL); |
2564 | break; | |
2565 | } | |
3bd1e081 | 2566 | default: |
b60e7183 | 2567 | ERR("unknown consumer type"); |
e9d6b496 | 2568 | errno = 0; |
3bd1e081 | 2569 | } |
8c0faa1d | 2570 | if (errno != 0) { |
4282f9a3 | 2571 | PERROR("Consumer execl()"); |
8c0faa1d | 2572 | } |
4282f9a3 | 2573 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2574 | exit(EXIT_FAILURE); |
2575 | } else if (pid > 0) { | |
2576 | ret = pid; | |
8c0faa1d | 2577 | } else { |
76d7553f | 2578 | PERROR("start consumer fork"); |
8c0faa1d | 2579 | ret = -errno; |
8c0faa1d | 2580 | } |
8f4905da | 2581 | error: |
8c0faa1d DG |
2582 | return ret; |
2583 | } | |
2584 | ||
693bd40b | 2585 | /* |
3bd1e081 | 2586 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2587 | */ |
3bd1e081 | 2588 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2589 | { |
c617c0c6 | 2590 | int ret; |
edb8b045 DG |
2591 | |
2592 | /* | |
2593 | * Set the listen() state on the socket since there is a possible race | |
2594 | * between the exec() of the consumer daemon and this call if place in the | |
2595 | * consumer thread. See bug #366 for more details. | |
2596 | */ | |
2597 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2598 | if (ret < 0) { | |
2599 | goto error; | |
2600 | } | |
693bd40b | 2601 | |
3bd1e081 MD |
2602 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2603 | if (consumer_data->pid != 0) { | |
2604 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2605 | goto end; |
2606 | } | |
693bd40b | 2607 | |
3bd1e081 | 2608 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2609 | if (ret < 0) { |
3bd1e081 MD |
2610 | ERR("Spawning consumerd failed"); |
2611 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2612 | goto error; |
693bd40b | 2613 | } |
c49dc785 | 2614 | |
3bd1e081 MD |
2615 | /* Setting up the consumer_data pid */ |
2616 | consumer_data->pid = ret; | |
48842b30 | 2617 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2618 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2619 | |
3bd1e081 MD |
2620 | DBG2("Spawning consumer control thread"); |
2621 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2622 | if (ret < 0) { |
3bd1e081 | 2623 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2624 | goto error; |
2625 | } | |
2626 | ||
c49dc785 | 2627 | end: |
693bd40b DG |
2628 | return 0; |
2629 | ||
2630 | error: | |
331744e3 | 2631 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2632 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2633 | int err; |
2634 | ||
edb8b045 DG |
2635 | err = close(consumer_data->err_sock); |
2636 | if (err < 0) { | |
2637 | PERROR("close consumer data error socket"); | |
2638 | } | |
2639 | } | |
693bd40b DG |
2640 | return ret; |
2641 | } | |
2642 | ||
b73401da | 2643 | /* |
096102bd | 2644 | * Setup necessary data for kernel tracer action. |
b73401da | 2645 | */ |
096102bd | 2646 | static int init_kernel_tracer(void) |
b73401da DG |
2647 | { |
2648 | int ret; | |
b73401da | 2649 | |
096102bd DG |
2650 | /* Modprobe lttng kernel modules */ |
2651 | ret = modprobe_lttng_control(); | |
b73401da | 2652 | if (ret < 0) { |
b73401da DG |
2653 | goto error; |
2654 | } | |
2655 | ||
096102bd DG |
2656 | /* Open debugfs lttng */ |
2657 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2658 | if (kernel_tracer_fd < 0) { | |
2659 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2660 | goto error_open; |
54d01ffb DG |
2661 | } |
2662 | ||
2f77fc4b | 2663 | /* Validate kernel version */ |
88076e89 JD |
2664 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
2665 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
2666 | if (ret < 0) { |
2667 | goto error_version; | |
b551a063 | 2668 | } |
54d01ffb | 2669 | |
2f77fc4b DG |
2670 | ret = modprobe_lttng_data(); |
2671 | if (ret < 0) { | |
2672 | goto error_modules; | |
54d01ffb DG |
2673 | } |
2674 | ||
6e21424e JR |
2675 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
2676 | kernel_tracer_fd); | |
2677 | if (ret < 0) { | |
2678 | goto error_modules; | |
2679 | } | |
2680 | ||
2681 | if (ret < 1) { | |
2682 | WARN("Kernel tracer does not support buffer monitoring. " | |
2683 | "The monitoring timer of channels in the kernel domain " | |
2684 | "will be set to 0 (disabled)."); | |
2685 | } | |
2686 | ||
2f77fc4b DG |
2687 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2688 | return 0; | |
2689 | ||
2690 | error_version: | |
2691 | modprobe_remove_lttng_control(); | |
2692 | ret = close(kernel_tracer_fd); | |
2693 | if (ret) { | |
2694 | PERROR("close"); | |
b551a063 | 2695 | } |
2f77fc4b | 2696 | kernel_tracer_fd = -1; |
f73fabfd | 2697 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2698 | |
2f77fc4b DG |
2699 | error_modules: |
2700 | ret = close(kernel_tracer_fd); | |
2701 | if (ret) { | |
2702 | PERROR("close"); | |
b551a063 | 2703 | } |
54d01ffb | 2704 | |
2f77fc4b DG |
2705 | error_open: |
2706 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2707 | |
2708 | error: | |
2f77fc4b DG |
2709 | WARN("No kernel tracer available"); |
2710 | kernel_tracer_fd = -1; | |
2711 | if (!is_root) { | |
f73fabfd | 2712 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2713 | } else { |
f73fabfd | 2714 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2715 | } |
54d01ffb DG |
2716 | } |
2717 | ||
2f77fc4b | 2718 | |
54d01ffb | 2719 | /* |
2f77fc4b DG |
2720 | * Copy consumer output from the tracing session to the domain session. The |
2721 | * function also applies the right modification on a per domain basis for the | |
2722 | * trace files destination directory. | |
36b588ed MD |
2723 | * |
2724 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2725 | */ |
2f77fc4b | 2726 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2727 | { |
2728 | int ret; | |
2f77fc4b DG |
2729 | const char *dir_name; |
2730 | struct consumer_output *consumer; | |
2731 | ||
2732 | assert(session); | |
2733 | assert(session->consumer); | |
54d01ffb | 2734 | |
b551a063 DG |
2735 | switch (domain) { |
2736 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2737 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2738 | /* |
2739 | * XXX: We should audit the session creation and what this function | |
2740 | * does "extra" in order to avoid a destroy since this function is used | |
2741 | * in the domain session creation (kernel and ust) only. Same for UST | |
2742 | * domain. | |
2743 | */ | |
2744 | if (session->kernel_session->consumer) { | |
6addfa37 | 2745 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2746 | } |
2f77fc4b DG |
2747 | session->kernel_session->consumer = |
2748 | consumer_copy_output(session->consumer); | |
2749 | /* Ease our life a bit for the next part */ | |
2750 | consumer = session->kernel_session->consumer; | |
2751 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2752 | break; |
f20baf8e | 2753 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2754 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2755 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2756 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2757 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2758 | if (session->ust_session->consumer) { |
6addfa37 | 2759 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2760 | } |
2f77fc4b DG |
2761 | session->ust_session->consumer = |
2762 | consumer_copy_output(session->consumer); | |
2763 | /* Ease our life a bit for the next part */ | |
2764 | consumer = session->ust_session->consumer; | |
2765 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2766 | break; |
2767 | default: | |
f73fabfd | 2768 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2769 | goto error; |
2770 | } | |
2771 | ||
2f77fc4b | 2772 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2773 | strncat(consumer->subdir, dir_name, |
2774 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2775 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2776 | ||
f73fabfd | 2777 | ret = LTTNG_OK; |
54d01ffb DG |
2778 | |
2779 | error: | |
2780 | return ret; | |
2781 | } | |
2782 | ||
00e2e675 | 2783 | /* |
2f77fc4b | 2784 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2785 | * |
2786 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2787 | */ |
2f77fc4b DG |
2788 | static int create_ust_session(struct ltt_session *session, |
2789 | struct lttng_domain *domain) | |
00e2e675 DG |
2790 | { |
2791 | int ret; | |
2f77fc4b | 2792 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2793 | |
a4b92340 | 2794 | assert(session); |
2f77fc4b DG |
2795 | assert(domain); |
2796 | assert(session->consumer); | |
a4b92340 | 2797 | |
2f77fc4b | 2798 | switch (domain->type) { |
f20baf8e | 2799 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2800 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2801 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2802 | case LTTNG_DOMAIN_UST: |
2803 | break; | |
2804 | default: | |
2805 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2806 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2807 | goto error; |
2808 | } | |
2809 | ||
2f77fc4b DG |
2810 | DBG("Creating UST session"); |
2811 | ||
dec56f6c | 2812 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2813 | if (lus == NULL) { |
f73fabfd | 2814 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2815 | goto error; |
2816 | } | |
2817 | ||
2f77fc4b DG |
2818 | lus->uid = session->uid; |
2819 | lus->gid = session->gid; | |
2bba9e53 | 2820 | lus->output_traces = session->output_traces; |
27babd3a | 2821 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2822 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2823 | session->ust_session = lus; |
d7ba1388 | 2824 | if (session->shm_path[0]) { |
3d071855 MD |
2825 | strncpy(lus->root_shm_path, session->shm_path, |
2826 | sizeof(lus->root_shm_path)); | |
2827 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2828 | strncpy(lus->shm_path, session->shm_path, |
2829 | sizeof(lus->shm_path)); | |
2830 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2831 | strncat(lus->shm_path, "/ust", | |
2832 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2833 | } | |
2f77fc4b DG |
2834 | /* Copy session output to the newly created UST session */ |
2835 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2836 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2837 | goto error; |
2838 | } | |
2839 | ||
f73fabfd | 2840 | return LTTNG_OK; |
00e2e675 DG |
2841 | |
2842 | error: | |
2f77fc4b DG |
2843 | free(lus); |
2844 | session->ust_session = NULL; | |
00e2e675 DG |
2845 | return ret; |
2846 | } | |
2847 | ||
2848 | /* | |
2f77fc4b | 2849 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2850 | */ |
2f77fc4b | 2851 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2852 | { |
2853 | int ret; | |
a4b92340 | 2854 | |
2f77fc4b | 2855 | DBG("Creating kernel session"); |
00e2e675 | 2856 | |
2f77fc4b DG |
2857 | ret = kernel_create_session(session, kernel_tracer_fd); |
2858 | if (ret < 0) { | |
f73fabfd | 2859 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2860 | goto error; |
2861 | } | |
2862 | ||
2f77fc4b DG |
2863 | /* Code flow safety */ |
2864 | assert(session->kernel_session); | |
2865 | ||
2866 | /* Copy session output to the newly created Kernel session */ | |
2867 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2868 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2869 | goto error; |
2870 | } | |
2871 | ||
2f77fc4b DG |
2872 | session->kernel_session->uid = session->uid; |
2873 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2874 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2875 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2876 | |
f73fabfd | 2877 | return LTTNG_OK; |
00e2e675 | 2878 | |
2f77fc4b DG |
2879 | error: |
2880 | trace_kernel_destroy_session(session->kernel_session); | |
2881 | session->kernel_session = NULL; | |
2882 | return ret; | |
2883 | } | |
00e2e675 | 2884 | |
2f77fc4b DG |
2885 | /* |
2886 | * Count number of session permitted by uid/gid. | |
2887 | */ | |
2888 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2889 | { | |
2890 | unsigned int i = 0; | |
2891 | struct ltt_session *session; | |
07424f16 | 2892 | |
2f77fc4b DG |
2893 | DBG("Counting number of available session for UID %d GID %d", |
2894 | uid, gid); | |
2895 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2896 | /* |
2f77fc4b | 2897 | * Only list the sessions the user can control. |
00e2e675 | 2898 | */ |
2f77fc4b DG |
2899 | if (!session_access_ok(session, uid, gid)) { |
2900 | continue; | |
2901 | } | |
2902 | i++; | |
a4b92340 | 2903 | } |
2f77fc4b | 2904 | return i; |
00e2e675 DG |
2905 | } |
2906 | ||
5c408ad8 JD |
2907 | /* |
2908 | * Check if the current kernel tracer supports the session rotation feature. | |
2909 | * Return 1 if it does, 0 otherwise. | |
2910 | */ | |
2911 | static int check_rotate_compatible(void) | |
2912 | { | |
2913 | int ret = 1; | |
2914 | ||
2915 | if (kernel_tracer_version.major != 2 || kernel_tracer_version.minor < 11) { | |
2916 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
2917 | ret = 0; | |
2918 | } | |
2919 | ||
2920 | return ret; | |
2921 | } | |
2922 | ||
54d01ffb DG |
2923 | /* |
2924 | * Process the command requested by the lttng client within the command | |
2925 | * context structure. This function make sure that the return structure (llm) | |
2926 | * is set and ready for transmission before returning. | |
2927 | * | |
2928 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2929 | * |
2930 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2931 | * |
2932 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2933 | */ |
53a80697 MD |
2934 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2935 | int *sock_error) | |
54d01ffb | 2936 | { |
f73fabfd | 2937 | int ret = LTTNG_OK; |
44d3bd01 | 2938 | int need_tracing_session = 1; |
2e09ba09 | 2939 | int need_domain; |
54d01ffb DG |
2940 | |
2941 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2942 | ||
3745d315 MD |
2943 | assert(!rcu_read_ongoing()); |
2944 | ||
53a80697 MD |
2945 | *sock_error = 0; |
2946 | ||
2e09ba09 MD |
2947 | switch (cmd_ctx->lsm->cmd_type) { |
2948 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2949 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2950 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2951 | case LTTNG_DESTROY_SESSION: |
2952 | case LTTNG_LIST_SESSIONS: | |
2953 | case LTTNG_LIST_DOMAINS: | |
2954 | case LTTNG_START_TRACE: | |
2955 | case LTTNG_STOP_TRACE: | |
6d805429 | 2956 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2957 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2958 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2959 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2960 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2961 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2962 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 2963 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 2964 | case LTTNG_REGENERATE_STATEDUMP: |
b3530820 JG |
2965 | case LTTNG_REGISTER_TRIGGER: |
2966 | case LTTNG_UNREGISTER_TRIGGER: | |
5c408ad8 | 2967 | case LTTNG_ROTATE_SESSION: |
d68c9a04 JD |
2968 | case LTTNG_ROTATION_GET_INFO: |
2969 | case LTTNG_SESSION_GET_CURRENT_OUTPUT: | |
259c2674 | 2970 | case LTTNG_ROTATION_SET_SCHEDULE: |
329f3443 JD |
2971 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
2972 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
2e09ba09 | 2973 | need_domain = 0; |
3aace903 | 2974 | break; |
2e09ba09 MD |
2975 | default: |
2976 | need_domain = 1; | |
2977 | } | |
2978 | ||
e6142f2e | 2979 | if (config.no_kernel && need_domain |
2e09ba09 | 2980 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { |
531d29f9 | 2981 | if (!is_root) { |
f73fabfd | 2982 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2983 | } else { |
f73fabfd | 2984 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2985 | } |
4fba7219 DG |
2986 | goto error; |
2987 | } | |
2988 | ||
8d3113b2 DG |
2989 | /* Deny register consumer if we already have a spawned consumer. */ |
2990 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2991 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2992 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2993 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2994 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2995 | goto error; |
2996 | } | |
2997 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2998 | } | |
2999 | ||
54d01ffb DG |
3000 | /* |
3001 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 3002 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
3003 | * command. |
3004 | */ | |
3005 | switch(cmd_ctx->lsm->cmd_type) { | |
3006 | case LTTNG_LIST_SESSIONS: | |
3007 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 3008 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
3009 | case LTTNG_LIST_DOMAINS: |
3010 | case LTTNG_LIST_CHANNELS: | |
3011 | case LTTNG_LIST_EVENTS: | |
834978fd | 3012 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 3013 | case LTTNG_LIST_TRACKER_PIDS: |
5cd0780d | 3014 | case LTTNG_DATA_PENDING: |
5c408ad8 | 3015 | case LTTNG_ROTATE_SESSION: |
d68c9a04 | 3016 | case LTTNG_ROTATION_GET_INFO: |
329f3443 JD |
3017 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
3018 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
54d01ffb DG |
3019 | break; |
3020 | default: | |
3021 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 3022 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
3023 | if (ret < 0) { |
3024 | /* This label does not try to unlock the session */ | |
3025 | goto init_setup_error; | |
3026 | } | |
3027 | } | |
3028 | ||
3029 | /* Commands that DO NOT need a session. */ | |
3030 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 3031 | case LTTNG_CREATE_SESSION: |
27babd3a | 3032 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 3033 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
3034 | case LTTNG_LIST_SESSIONS: |
3035 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 3036 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 3037 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 3038 | case LTTNG_SAVE_SESSION: |
b3530820 JG |
3039 | case LTTNG_REGISTER_TRIGGER: |
3040 | case LTTNG_UNREGISTER_TRIGGER: | |
44d3bd01 | 3041 | need_tracing_session = 0; |
54d01ffb DG |
3042 | break; |
3043 | default: | |
3044 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
3045 | /* |
3046 | * We keep the session list lock across _all_ commands | |
3047 | * for now, because the per-session lock does not | |
3048 | * handle teardown properly. | |
3049 | */ | |
74babd95 | 3050 | session_lock_list(); |
54d01ffb DG |
3051 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
3052 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 3053 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
3054 | goto error; |
3055 | } else { | |
3056 | /* Acquire lock for the session */ | |
3057 | session_lock(cmd_ctx->session); | |
3058 | } | |
3059 | break; | |
3060 | } | |
b389abbe | 3061 | |
5f3ecf22 DG |
3062 | /* |
3063 | * Commands that need a valid session but should NOT create one if none | |
3064 | * exists. Instead of creating one and destroying it when the command is | |
3065 | * handled, process that right before so we save some round trip in useless | |
3066 | * code path. | |
3067 | */ | |
3068 | switch (cmd_ctx->lsm->cmd_type) { | |
3069 | case LTTNG_DISABLE_CHANNEL: | |
3070 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3071 | switch (cmd_ctx->lsm->domain.type) { |
3072 | case LTTNG_DOMAIN_KERNEL: | |
3073 | if (!cmd_ctx->session->kernel_session) { | |
3074 | ret = LTTNG_ERR_NO_CHANNEL; | |
3075 | goto error; | |
3076 | } | |
3077 | break; | |
3078 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3079 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3080 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3081 | case LTTNG_DOMAIN_UST: |
3082 | if (!cmd_ctx->session->ust_session) { | |
3083 | ret = LTTNG_ERR_NO_CHANNEL; | |
3084 | goto error; | |
3085 | } | |
3086 | break; | |
3087 | default: | |
3088 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3089 | goto error; | |
3090 | } | |
3091 | default: | |
3092 | break; | |
3093 | } | |
3094 | ||
2e09ba09 MD |
3095 | if (!need_domain) { |
3096 | goto skip_domain; | |
3097 | } | |
a4b92340 | 3098 | |
54d01ffb DG |
3099 | /* |
3100 | * Check domain type for specific "pre-action". | |
3101 | */ | |
3102 | switch (cmd_ctx->lsm->domain.type) { | |
3103 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3104 | if (!is_root) { |
f73fabfd | 3105 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3106 | goto error; |
3107 | } | |
3108 | ||
54d01ffb | 3109 | /* Kernel tracer check */ |
a4b35e07 | 3110 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3111 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3112 | ret = init_kernel_tracer(); |
3113 | if (ret != 0) { | |
54d01ffb DG |
3114 | goto error; |
3115 | } | |
3116 | } | |
5eb91c98 | 3117 | |
5c827ce0 DG |
3118 | /* Consumer is in an ERROR state. Report back to client */ |
3119 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3120 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3121 | goto error; |
3122 | } | |
3123 | ||
54d01ffb | 3124 | /* Need a session for kernel command */ |
44d3bd01 | 3125 | if (need_tracing_session) { |
54d01ffb | 3126 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3127 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3128 | if (ret < 0) { |
f73fabfd | 3129 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3130 | goto error; |
3131 | } | |
b389abbe | 3132 | } |
7d29a247 | 3133 | |
54d01ffb | 3134 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3135 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3136 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3137 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3138 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3139 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3140 | if (ret < 0) { |
f73fabfd | 3141 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3142 | goto error; |
950131af | 3143 | } |
5c827ce0 | 3144 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3145 | } else { |
3146 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3147 | } |
173af62f | 3148 | |
a4b92340 DG |
3149 | /* |
3150 | * The consumer was just spawned so we need to add the socket to | |
3151 | * the consumer output of the session if exist. | |
3152 | */ | |
3153 | ret = consumer_create_socket(&kconsumer_data, | |
3154 | cmd_ctx->session->kernel_session->consumer); | |
3155 | if (ret < 0) { | |
3156 | goto error; | |
173af62f | 3157 | } |
0d0c377a | 3158 | } |
5c827ce0 | 3159 | |
54d01ffb | 3160 | break; |
b9dfb167 | 3161 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3162 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3163 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3164 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3165 | { |
b51ec5b4 MD |
3166 | if (!ust_app_supported()) { |
3167 | ret = LTTNG_ERR_NO_UST; | |
3168 | goto error; | |
3169 | } | |
5c827ce0 DG |
3170 | /* Consumer is in an ERROR state. Report back to client */ |
3171 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3172 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3173 | goto error; |
3174 | } | |
3175 | ||
44d3bd01 | 3176 | if (need_tracing_session) { |
a4b92340 | 3177 | /* Create UST session if none exist. */ |
f6a9efaa | 3178 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3179 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3180 | &cmd_ctx->lsm->domain); |
f73fabfd | 3181 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3182 | goto error; |
3183 | } | |
3184 | } | |
00e2e675 | 3185 | |
7753dea8 MD |
3186 | /* Start the UST consumer daemons */ |
3187 | /* 64-bit */ | |
3188 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
e6142f2e | 3189 | if (config.consumerd64_bin_path.value && |
7753dea8 | 3190 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3191 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3192 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3193 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3194 | if (ret < 0) { |
f73fabfd | 3195 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3196 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3197 | goto error; |
3198 | } | |
48842b30 | 3199 | |
173af62f | 3200 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3201 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3202 | } else { |
7753dea8 MD |
3203 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3204 | } | |
173af62f DG |
3205 | |
3206 | /* | |
3207 | * Setup socket for consumer 64 bit. No need for atomic access | |
3208 | * since it was set above and can ONLY be set in this thread. | |
3209 | */ | |
a4b92340 DG |
3210 | ret = consumer_create_socket(&ustconsumer64_data, |
3211 | cmd_ctx->session->ust_session->consumer); | |
3212 | if (ret < 0) { | |
3213 | goto error; | |
173af62f DG |
3214 | } |
3215 | ||
7753dea8 | 3216 | /* 32-bit */ |
385b881b | 3217 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
e6142f2e | 3218 | if (config.consumerd32_bin_path.value && |
7753dea8 | 3219 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3220 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3221 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3222 | ret = start_consumerd(&ustconsumer32_data); | |
3223 | if (ret < 0) { | |
f73fabfd | 3224 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3225 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3226 | goto error; |
3227 | } | |
5c827ce0 | 3228 | |
173af62f | 3229 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3230 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3231 | } else { |
3232 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3233 | } |
173af62f DG |
3234 | |
3235 | /* | |
3236 | * Setup socket for consumer 64 bit. No need for atomic access | |
3237 | * since it was set above and can ONLY be set in this thread. | |
3238 | */ | |
a4b92340 DG |
3239 | ret = consumer_create_socket(&ustconsumer32_data, |
3240 | cmd_ctx->session->ust_session->consumer); | |
3241 | if (ret < 0) { | |
3242 | goto error; | |
173af62f | 3243 | } |
44d3bd01 DG |
3244 | } |
3245 | break; | |
48842b30 | 3246 | } |
54d01ffb | 3247 | default: |
54d01ffb DG |
3248 | break; |
3249 | } | |
2e09ba09 | 3250 | skip_domain: |
33a2b854 | 3251 | |
5c827ce0 DG |
3252 | /* Validate consumer daemon state when start/stop trace command */ |
3253 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3254 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3255 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3256 | case LTTNG_DOMAIN_NONE: |
3257 | break; | |
b9dfb167 | 3258 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3259 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3260 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3261 | case LTTNG_DOMAIN_UST: |
3262 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3263 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3264 | goto error; |
3265 | } | |
3266 | break; | |
3267 | case LTTNG_DOMAIN_KERNEL: | |
3268 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3269 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3270 | goto error; |
3271 | } | |
3272 | break; | |
825535cc JG |
3273 | default: |
3274 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3275 | goto error; | |
5c827ce0 DG |
3276 | } |
3277 | } | |
3278 | ||
8e0af1b4 MD |
3279 | /* |
3280 | * Check that the UID or GID match that of the tracing session. | |
3281 | * The root user can interact with all sessions. | |
3282 | */ | |
3283 | if (need_tracing_session) { | |
3284 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3285 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3286 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3287 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3288 | goto error; |
3289 | } | |
3290 | } | |
3291 | ||
ffe60014 DG |
3292 | /* |
3293 | * Send relayd information to consumer as soon as we have a domain and a | |
3294 | * session defined. | |
3295 | */ | |
3296 | if (cmd_ctx->session && need_domain) { | |
3297 | /* | |
3298 | * Setup relayd if not done yet. If the relayd information was already | |
3299 | * sent to the consumer, this call will gracefully return. | |
3300 | */ | |
3301 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3302 | if (ret != LTTNG_OK) { | |
3303 | goto error; | |
3304 | } | |
3305 | } | |
3306 | ||
54d01ffb DG |
3307 | /* Process by command type */ |
3308 | switch (cmd_ctx->lsm->cmd_type) { | |
3309 | case LTTNG_ADD_CONTEXT: | |
3310 | { | |
2001793c JG |
3311 | /* |
3312 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3313 | * payload if the context being added is an application context. | |
3314 | */ | |
3315 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3316 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3317 | char *provider_name = NULL, *context_name = NULL; | |
3318 | size_t provider_name_len = | |
3319 | cmd_ctx->lsm->u.context.provider_name_len; | |
3320 | size_t context_name_len = | |
3321 | cmd_ctx->lsm->u.context.context_name_len; | |
3322 | ||
3323 | if (provider_name_len == 0 || context_name_len == 0) { | |
3324 | /* | |
3325 | * Application provider and context names MUST | |
3326 | * be provided. | |
3327 | */ | |
3328 | ret = -LTTNG_ERR_INVALID; | |
3329 | goto error; | |
3330 | } | |
3331 | ||
3332 | provider_name = zmalloc(provider_name_len + 1); | |
3333 | if (!provider_name) { | |
3334 | ret = -LTTNG_ERR_NOMEM; | |
3335 | goto error; | |
3336 | } | |
e0f4d107 JG |
3337 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3338 | provider_name; | |
2001793c JG |
3339 | |
3340 | context_name = zmalloc(context_name_len + 1); | |
3341 | if (!context_name) { | |
3342 | ret = -LTTNG_ERR_NOMEM; | |
3343 | goto error_add_context; | |
3344 | } | |
e0f4d107 JG |
3345 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3346 | context_name; | |
2001793c JG |
3347 | |
3348 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3349 | provider_name_len); | |
3350 | if (ret < 0) { | |
3351 | goto error_add_context; | |
3352 | } | |
3353 | ||
3354 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3355 | context_name_len); | |
3356 | if (ret < 0) { | |
3357 | goto error_add_context; | |
3358 | } | |
2001793c JG |
3359 | } |
3360 | ||
3361 | /* | |
3362 | * cmd_add_context assumes ownership of the provider and context | |
3363 | * names. | |
3364 | */ | |
3365 | ret = cmd_add_context(cmd_ctx->session, | |
3366 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3367 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3368 | &cmd_ctx->lsm->u.context.ctx, |
3369 | kernel_poll_pipe[1]); | |
3370 | ||
3371 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3372 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3373 | error_add_context: | |
3374 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3375 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3376 | if (ret < 0) { | |
3377 | goto error; | |
3378 | } | |
54d01ffb DG |
3379 | break; |
3380 | } | |
3381 | case LTTNG_DISABLE_CHANNEL: | |
3382 | { | |
3383 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3384 | cmd_ctx->lsm->u.disable.channel_name); | |
3385 | break; | |
3386 | } | |
3387 | case LTTNG_DISABLE_EVENT: | |
3388 | { | |
47b7e2f9 JG |
3389 | |
3390 | /* | |
3391 | * FIXME: handle filter; for now we just receive the filter's | |
3392 | * bytecode along with the filter expression which are sent by | |
3393 | * liblttng-ctl and discard them. | |
3394 | * | |
3395 | * This fixes an issue where the client may block while sending | |
3396 | * the filter payload and encounter an error because the session | |
3397 | * daemon closes the socket without ever handling this data. | |
3398 | */ | |
3399 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3400 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3401 | ||
3402 | if (count) { | |
3403 | char data[LTTNG_FILTER_MAX_LEN]; | |
3404 | ||
3405 | DBG("Discarding disable event command payload of size %zu", count); | |
3406 | while (count) { | |
3407 | ret = lttcomm_recv_unix_sock(sock, data, | |
3408 | count > sizeof(data) ? sizeof(data) : count); | |
3409 | if (ret < 0) { | |
3410 | goto error; | |
3411 | } | |
3412 | ||
3413 | count -= (size_t) ret; | |
3414 | } | |
3415 | } | |
6e911cad | 3416 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3417 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3418 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3419 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3420 | break; |
3421 | } | |
54d01ffb DG |
3422 | case LTTNG_ENABLE_CHANNEL: |
3423 | { | |
b3530820 JG |
3424 | cmd_ctx->lsm->u.channel.chan.attr.extended.ptr = |
3425 | (struct lttng_channel_extended *) &cmd_ctx->lsm->u.channel.extended; | |
7972aab2 | 3426 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
b3530820 JG |
3427 | &cmd_ctx->lsm->u.channel.chan, |
3428 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3429 | break; |
3430 | } | |
ccf10263 MD |
3431 | case LTTNG_TRACK_PID: |
3432 | { | |
3433 | ret = cmd_track_pid(cmd_ctx->session, | |
3434 | cmd_ctx->lsm->domain.type, | |
3435 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3436 | break; | |
3437 | } | |
3438 | case LTTNG_UNTRACK_PID: | |
3439 | { | |
3440 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3441 | cmd_ctx->lsm->domain.type, | |
3442 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3443 | break; | |
3444 | } | |
54d01ffb DG |
3445 | case LTTNG_ENABLE_EVENT: |
3446 | { | |
882ef835 JI |
3447 | struct lttng_event_exclusion *exclusion = NULL; |
3448 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3449 | char *filter_expression = NULL; |
882ef835 | 3450 | |
67676bd8 DG |
3451 | /* Handle exclusion events and receive it from the client. */ |
3452 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3453 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3454 | ||
3455 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3456 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3457 | if (!exclusion) { | |
3458 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3459 | goto error; | |
882ef835 | 3460 | } |
882ef835 | 3461 | |
67676bd8 DG |
3462 | DBG("Receiving var len exclusion event list from client ..."); |
3463 | exclusion->count = count; | |
3464 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3465 | count * LTTNG_SYMBOL_NAME_LEN); | |
3466 | if (ret <= 0) { | |
3467 | DBG("Nothing recv() from client var len data... continuing"); | |
3468 | *sock_error = 1; | |
3469 | free(exclusion); | |
3470 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3471 | goto error; | |
3472 | } | |
3473 | } | |
3474 | ||
6b453b5e JG |
3475 | /* Get filter expression from client. */ |
3476 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3477 | size_t expression_len = | |
3478 | cmd_ctx->lsm->u.enable.expression_len; | |
3479 | ||
3480 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3481 | ret = LTTNG_ERR_FILTER_INVAL; | |
3482 | free(exclusion); | |
3483 | goto error; | |
3484 | } | |
3485 | ||
3486 | filter_expression = zmalloc(expression_len); | |
3487 | if (!filter_expression) { | |
3488 | free(exclusion); | |
3489 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3490 | goto error; | |
3491 | } | |
3492 | ||
3493 | /* Receive var. len. data */ | |
3494 | DBG("Receiving var len filter's expression from client ..."); | |
3495 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3496 | expression_len); | |
3497 | if (ret <= 0) { | |
3498 | DBG("Nothing recv() from client car len data... continuing"); | |
3499 | *sock_error = 1; | |
3500 | free(filter_expression); | |
3501 | free(exclusion); | |
3502 | ret = LTTNG_ERR_FILTER_INVAL; | |
3503 | goto error; | |
3504 | } | |
3505 | } | |
3506 | ||
67676bd8 DG |
3507 | /* Handle filter and get bytecode from client. */ |
3508 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3509 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3510 | ||
3511 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3512 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3513 | free(filter_expression); |
67676bd8 DG |
3514 | free(exclusion); |
3515 | goto error; | |
3516 | } | |
3517 | ||
3518 | bytecode = zmalloc(bytecode_len); | |
3519 | if (!bytecode) { | |
49d21f93 | 3520 | free(filter_expression); |
67676bd8 DG |
3521 | free(exclusion); |
3522 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3523 | goto error; | |
882ef835 JI |
3524 | } |
3525 | ||
67676bd8 DG |
3526 | /* Receive var. len. data */ |
3527 | DBG("Receiving var len filter's bytecode from client ..."); | |
3528 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3529 | if (ret <= 0) { | |
3530 | DBG("Nothing recv() from client car len data... continuing"); | |
3531 | *sock_error = 1; | |
49d21f93 | 3532 | free(filter_expression); |
67676bd8 DG |
3533 | free(bytecode); |
3534 | free(exclusion); | |
3535 | ret = LTTNG_ERR_FILTER_INVAL; | |
3536 | goto error; | |
3537 | } | |
3538 | ||
3539 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3540 | free(filter_expression); |
67676bd8 DG |
3541 | free(bytecode); |
3542 | free(exclusion); | |
3543 | ret = LTTNG_ERR_FILTER_INVAL; | |
3544 | goto error; | |
3545 | } | |
882ef835 | 3546 | } |
67676bd8 DG |
3547 | |
3548 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3549 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3550 | &cmd_ctx->lsm->u.enable.event, |
3551 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3552 | kernel_poll_pipe[1]); |
54d01ffb DG |
3553 | break; |
3554 | } | |
052da939 | 3555 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3556 | { |
9f19cc17 | 3557 | struct lttng_event *events; |
54d01ffb | 3558 | ssize_t nb_events; |
052da939 | 3559 | |
0845bbfa | 3560 | session_lock_list(); |
54d01ffb | 3561 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3562 | session_unlock_list(); |
54d01ffb | 3563 | if (nb_events < 0) { |
f73fabfd | 3564 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3565 | ret = -nb_events; |
3566 | goto error; | |
2ef84c95 DG |
3567 | } |
3568 | ||
3569 | /* | |
3570 | * Setup lttng message with payload size set to the event list size in | |
3571 | * bytes and then copy list into the llm payload. | |
3572 | */ | |
6e10c9b9 PP |
3573 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3574 | sizeof(struct lttng_event) * nb_events); | |
3575 | free(events); | |
3576 | ||
2ef84c95 DG |
3577 | if (ret < 0) { |
3578 | goto setup_error; | |
3579 | } | |
3580 | ||
f73fabfd | 3581 | ret = LTTNG_OK; |
2ef84c95 DG |
3582 | break; |
3583 | } | |
f37d259d MD |
3584 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3585 | { | |
3586 | struct lttng_event_field *fields; | |
3587 | ssize_t nb_fields; | |
3588 | ||
0845bbfa | 3589 | session_lock_list(); |
a4b92340 DG |
3590 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3591 | &fields); | |
0845bbfa | 3592 | session_unlock_list(); |
f37d259d | 3593 | if (nb_fields < 0) { |
f73fabfd | 3594 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3595 | ret = -nb_fields; |
3596 | goto error; | |
3597 | } | |
3598 | ||
3599 | /* | |
3600 | * Setup lttng message with payload size set to the event list size in | |
3601 | * bytes and then copy list into the llm payload. | |
3602 | */ | |
6e10c9b9 | 3603 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3604 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3605 | free(fields); |
3606 | ||
f37d259d | 3607 | if (ret < 0) { |
f37d259d MD |
3608 | goto setup_error; |
3609 | } | |
3610 | ||
f73fabfd | 3611 | ret = LTTNG_OK; |
f37d259d MD |
3612 | break; |
3613 | } | |
834978fd DG |
3614 | case LTTNG_LIST_SYSCALLS: |
3615 | { | |
3616 | struct lttng_event *events; | |
3617 | ssize_t nb_events; | |
3618 | ||
3619 | nb_events = cmd_list_syscalls(&events); | |
3620 | if (nb_events < 0) { | |
3621 | /* Return value is a negative lttng_error_code. */ | |
3622 | ret = -nb_events; | |
3623 | goto error; | |
3624 | } | |
3625 | ||
3626 | /* | |
3627 | * Setup lttng message with payload size set to the event list size in | |
3628 | * bytes and then copy list into the llm payload. | |
3629 | */ | |
6e10c9b9 PP |
3630 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3631 | sizeof(struct lttng_event) * nb_events); | |
3632 | free(events); | |
3633 | ||
834978fd | 3634 | if (ret < 0) { |
834978fd DG |
3635 | goto setup_error; |
3636 | } | |
3637 | ||
834978fd DG |
3638 | ret = LTTNG_OK; |
3639 | break; | |
3640 | } | |
a5dfbb9d MD |
3641 | case LTTNG_LIST_TRACKER_PIDS: |
3642 | { | |
3643 | int32_t *pids = NULL; | |
3644 | ssize_t nr_pids; | |
3645 | ||
3646 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3647 | cmd_ctx->lsm->domain.type, &pids); | |
3648 | if (nr_pids < 0) { | |
3649 | /* Return value is a negative lttng_error_code. */ | |
3650 | ret = -nr_pids; | |
3651 | goto error; | |
3652 | } | |
3653 | ||
3654 | /* | |
3655 | * Setup lttng message with payload size set to the event list size in | |
3656 | * bytes and then copy list into the llm payload. | |
3657 | */ | |
6e10c9b9 PP |
3658 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3659 | sizeof(int32_t) * nr_pids); | |
3660 | free(pids); | |
3661 | ||
a5dfbb9d | 3662 | if (ret < 0) { |
a5dfbb9d MD |
3663 | goto setup_error; |
3664 | } | |
3665 | ||
a5dfbb9d MD |
3666 | ret = LTTNG_OK; |
3667 | break; | |
3668 | } | |
00e2e675 DG |
3669 | case LTTNG_SET_CONSUMER_URI: |
3670 | { | |
a4b92340 DG |
3671 | size_t nb_uri, len; |
3672 | struct lttng_uri *uris; | |
3673 | ||
3674 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3675 | len = nb_uri * sizeof(struct lttng_uri); | |
3676 | ||
3677 | if (nb_uri == 0) { | |
f73fabfd | 3678 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3679 | goto error; |
3680 | } | |
3681 | ||
3682 | uris = zmalloc(len); | |
3683 | if (uris == NULL) { | |
f73fabfd | 3684 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3685 | goto error; |
3686 | } | |
3687 | ||
3688 | /* Receive variable len data */ | |
77c7c900 | 3689 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3690 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3691 | if (ret <= 0) { | |
3692 | DBG("No URIs received from client... continuing"); | |
3693 | *sock_error = 1; | |
f73fabfd | 3694 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3695 | free(uris); |
a4b92340 DG |
3696 | goto error; |
3697 | } | |
3698 | ||
bda32d56 JG |
3699 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3700 | free(uris); | |
f73fabfd | 3701 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3702 | goto error; |
3703 | } | |
3704 | ||
b1d41407 | 3705 | |
00e2e675 DG |
3706 | break; |
3707 | } | |
f3ed775e | 3708 | case LTTNG_START_TRACE: |
8c0faa1d | 3709 | { |
259c2674 JD |
3710 | /* |
3711 | * On the first start, if we have a kernel session and we have | |
3712 | * enabled time or size-based rotations, we have to make sure | |
3713 | * the kernel tracer supports it. | |
3714 | */ | |
3715 | if (!cmd_ctx->session->has_been_started && \ | |
3716 | cmd_ctx->session->kernel_session && \ | |
3717 | (cmd_ctx->session->rotate_timer_period || \ | |
3718 | cmd_ctx->session->rotate_size) && \ | |
3719 | !check_rotate_compatible()) { | |
3720 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
3721 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
3722 | goto error; | |
3723 | } | |
54d01ffb | 3724 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3725 | break; |
3726 | } | |
f3ed775e | 3727 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3728 | { |
54d01ffb | 3729 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3730 | break; |
3731 | } | |
5e16da05 MD |
3732 | case LTTNG_CREATE_SESSION: |
3733 | { | |
a4b92340 DG |
3734 | size_t nb_uri, len; |
3735 | struct lttng_uri *uris = NULL; | |
3736 | ||
3737 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3738 | len = nb_uri * sizeof(struct lttng_uri); | |
3739 | ||
3740 | if (nb_uri > 0) { | |
3741 | uris = zmalloc(len); | |
3742 | if (uris == NULL) { | |
f73fabfd | 3743 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3744 | goto error; |
3745 | } | |
3746 | ||
3747 | /* Receive variable len data */ | |
77c7c900 | 3748 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3749 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3750 | if (ret <= 0) { | |
3751 | DBG("No URIs received from client... continuing"); | |
3752 | *sock_error = 1; | |
f73fabfd | 3753 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3754 | free(uris); |
a4b92340 DG |
3755 | goto error; |
3756 | } | |
3757 | ||
3758 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3759 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3760 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3761 | free(uris); |
a4b92340 DG |
3762 | goto error; |
3763 | } | |
3764 | } | |
3765 | ||
3766 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3767 | &cmd_ctx->creds, 0); |
a4b92340 | 3768 | |
b1d41407 DG |
3769 | free(uris); |
3770 | ||
00e2e675 DG |
3771 | break; |
3772 | } | |
5e16da05 MD |
3773 | case LTTNG_DESTROY_SESSION: |
3774 | { | |
90936dcf JD |
3775 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1], |
3776 | notification_thread_handle); | |
a4b92340 DG |
3777 | |
3778 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3779 | cmd_ctx->session = NULL; |
5461b305 | 3780 | break; |
5e16da05 | 3781 | } |
9f19cc17 | 3782 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3783 | { |
54d01ffb | 3784 | ssize_t nb_dom; |
fa64dfb4 | 3785 | struct lttng_domain *domains = NULL; |
5461b305 | 3786 | |
54d01ffb DG |
3787 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3788 | if (nb_dom < 0) { | |
f73fabfd | 3789 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3790 | ret = -nb_dom; |
3791 | goto error; | |
ce3d728c | 3792 | } |
520ff687 | 3793 | |
6e10c9b9 PP |
3794 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3795 | nb_dom * sizeof(struct lttng_domain)); | |
3796 | free(domains); | |
3797 | ||
5461b305 DG |
3798 | if (ret < 0) { |
3799 | goto setup_error; | |
520ff687 | 3800 | } |
57167058 | 3801 | |
f73fabfd | 3802 | ret = LTTNG_OK; |
5e16da05 MD |
3803 | break; |
3804 | } | |
9f19cc17 | 3805 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3806 | { |
53e367f9 | 3807 | ssize_t payload_size; |
ade7ce52 | 3808 | struct lttng_channel *channels = NULL; |
54d01ffb | 3809 | |
53e367f9 | 3810 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3811 | cmd_ctx->session, &channels); |
53e367f9 | 3812 | if (payload_size < 0) { |
f73fabfd | 3813 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3814 | ret = -payload_size; |
54d01ffb | 3815 | goto error; |
5461b305 | 3816 | } |
ca95a216 | 3817 | |
6e10c9b9 | 3818 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3819 | payload_size); |
6e10c9b9 PP |
3820 | free(channels); |
3821 | ||
5461b305 DG |
3822 | if (ret < 0) { |
3823 | goto setup_error; | |
3824 | } | |
9f19cc17 | 3825 | |
f73fabfd | 3826 | ret = LTTNG_OK; |
5461b305 | 3827 | break; |
5e16da05 | 3828 | } |
9f19cc17 | 3829 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3830 | { |
b551a063 | 3831 | ssize_t nb_event; |
684d34d2 | 3832 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3833 | struct lttcomm_event_command_header cmd_header; |
3834 | size_t total_size; | |
3835 | ||
b2d66287 | 3836 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3837 | /* Extended infos are included at the end of events */ |
3838 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3839 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3840 | &events, &total_size); | |
9f19cc17 | 3841 | |
54d01ffb | 3842 | if (nb_event < 0) { |
f73fabfd | 3843 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3844 | ret = -nb_event; |
3845 | goto error; | |
5461b305 | 3846 | } |
ca95a216 | 3847 | |
b4e3ceb9 PP |
3848 | cmd_header.nb_events = nb_event; |
3849 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
3850 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
3851 | free(events); |
3852 | ||
5461b305 DG |
3853 | if (ret < 0) { |
3854 | goto setup_error; | |
3855 | } | |
9f19cc17 | 3856 | |
f73fabfd | 3857 | ret = LTTNG_OK; |
5461b305 | 3858 | break; |
5e16da05 MD |
3859 | } |
3860 | case LTTNG_LIST_SESSIONS: | |
3861 | { | |
8e0af1b4 | 3862 | unsigned int nr_sessions; |
6e10c9b9 PP |
3863 | void *sessions_payload; |
3864 | size_t payload_len; | |
5461b305 | 3865 | |
8e0af1b4 | 3866 | session_lock_list(); |
730389d9 DG |
3867 | nr_sessions = lttng_sessions_count( |
3868 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3869 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
3870 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
3871 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 3872 | |
6e10c9b9 | 3873 | if (!sessions_payload) { |
54d01ffb | 3874 | session_unlock_list(); |
6e10c9b9 | 3875 | ret = -ENOMEM; |
5461b305 | 3876 | goto setup_error; |
e065084a | 3877 | } |
5e16da05 | 3878 | |
6e10c9b9 | 3879 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
3880 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3881 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 3882 | session_unlock_list(); |
5e16da05 | 3883 | |
6e10c9b9 PP |
3884 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
3885 | payload_len); | |
3886 | free(sessions_payload); | |
3887 | ||
3888 | if (ret < 0) { | |
3889 | goto setup_error; | |
3890 | } | |
3891 | ||
f73fabfd | 3892 | ret = LTTNG_OK; |
5e16da05 MD |
3893 | break; |
3894 | } | |
d9800920 DG |
3895 | case LTTNG_REGISTER_CONSUMER: |
3896 | { | |
2f77fc4b DG |
3897 | struct consumer_data *cdata; |
3898 | ||
3899 | switch (cmd_ctx->lsm->domain.type) { | |
3900 | case LTTNG_DOMAIN_KERNEL: | |
3901 | cdata = &kconsumer_data; | |
3902 | break; | |
3903 | default: | |
f73fabfd | 3904 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3905 | goto error; |
3906 | } | |
3907 | ||
54d01ffb | 3908 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3909 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3910 | break; |
3911 | } | |
6d805429 | 3912 | case LTTNG_DATA_PENDING: |
806e2684 | 3913 | { |
f6151c55 | 3914 | int pending_ret; |
6e10c9b9 | 3915 | uint8_t pending_ret_byte; |
f6151c55 JG |
3916 | |
3917 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 3918 | |
f6151c55 JG |
3919 | /* |
3920 | * FIXME | |
3921 | * | |
3922 | * This function may returns 0 or 1 to indicate whether or not | |
3923 | * there is data pending. In case of error, it should return an | |
3924 | * LTTNG_ERR code. However, some code paths may still return | |
3925 | * a nondescript error code, which we handle by returning an | |
3926 | * "unknown" error. | |
3927 | */ | |
3928 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
3929 | /* |
3930 | * ret will be set to LTTNG_OK at the end of | |
3931 | * this function. | |
3932 | */ | |
f6151c55 JG |
3933 | } else if (pending_ret < 0) { |
3934 | ret = LTTNG_ERR_UNK; | |
3935 | goto setup_error; | |
3936 | } else { | |
3937 | ret = pending_ret; | |
3938 | goto setup_error; | |
3939 | } | |
3940 | ||
6e10c9b9 PP |
3941 | pending_ret_byte = (uint8_t) pending_ret; |
3942 | ||
3943 | /* 1 byte to return whether or not data is pending */ | |
3944 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
3945 | &pending_ret_byte, 1); | |
3946 | ||
3947 | if (ret < 0) { | |
3948 | goto setup_error; | |
3949 | } | |
3950 | ||
3951 | ret = LTTNG_OK; | |
806e2684 DG |
3952 | break; |
3953 | } | |
da3c9ec1 DG |
3954 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3955 | { | |
6dc3064a DG |
3956 | struct lttcomm_lttng_output_id reply; |
3957 | ||
3958 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3959 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3960 | if (ret != LTTNG_OK) { | |
3961 | goto error; | |
3962 | } | |
3963 | ||
6e10c9b9 PP |
3964 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
3965 | sizeof(reply)); | |
6dc3064a DG |
3966 | if (ret < 0) { |
3967 | goto setup_error; | |
3968 | } | |
3969 | ||
3970 | /* Copy output list into message payload */ | |
6dc3064a | 3971 | ret = LTTNG_OK; |
da3c9ec1 DG |
3972 | break; |
3973 | } | |
3974 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3975 | { | |
6dc3064a DG |
3976 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3977 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3978 | break; |
3979 | } | |
3980 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3981 | { | |
6dc3064a DG |
3982 | ssize_t nb_output; |
3983 | struct lttng_snapshot_output *outputs = NULL; | |
3984 | ||
3985 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3986 | if (nb_output < 0) { | |
3987 | ret = -nb_output; | |
3988 | goto error; | |
3989 | } | |
3990 | ||
6e10c9b9 PP |
3991 | assert((nb_output > 0 && outputs) || nb_output == 0); |
3992 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 3993 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
3994 | free(outputs); |
3995 | ||
6dc3064a | 3996 | if (ret < 0) { |
6dc3064a DG |
3997 | goto setup_error; |
3998 | } | |
3999 | ||
6dc3064a | 4000 | ret = LTTNG_OK; |
da3c9ec1 DG |
4001 | break; |
4002 | } | |
4003 | case LTTNG_SNAPSHOT_RECORD: | |
4004 | { | |
6dc3064a DG |
4005 | ret = cmd_snapshot_record(cmd_ctx->session, |
4006 | &cmd_ctx->lsm->u.snapshot_record.output, | |
4007 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
4008 | break; |
4009 | } | |
27babd3a DG |
4010 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
4011 | { | |
4012 | size_t nb_uri, len; | |
4013 | struct lttng_uri *uris = NULL; | |
4014 | ||
4015 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4016 | len = nb_uri * sizeof(struct lttng_uri); | |
4017 | ||
4018 | if (nb_uri > 0) { | |
4019 | uris = zmalloc(len); | |
4020 | if (uris == NULL) { | |
4021 | ret = LTTNG_ERR_FATAL; | |
4022 | goto error; | |
4023 | } | |
4024 | ||
4025 | /* Receive variable len data */ | |
4026 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4027 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4028 | if (ret <= 0) { | |
4029 | DBG("No URIs received from client... continuing"); | |
4030 | *sock_error = 1; | |
4031 | ret = LTTNG_ERR_SESSION_FAIL; | |
4032 | free(uris); | |
4033 | goto error; | |
4034 | } | |
4035 | ||
4036 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4037 | DBG("Creating session with ONE network URI is a bad call"); | |
4038 | ret = LTTNG_ERR_SESSION_FAIL; | |
4039 | free(uris); | |
4040 | goto error; | |
4041 | } | |
4042 | } | |
4043 | ||
4044 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
4045 | nb_uri, &cmd_ctx->creds); | |
4046 | free(uris); | |
4047 | break; | |
4048 | } | |
ecc48a90 JD |
4049 | case LTTNG_CREATE_SESSION_LIVE: |
4050 | { | |
4051 | size_t nb_uri, len; | |
4052 | struct lttng_uri *uris = NULL; | |
4053 | ||
4054 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
4055 | len = nb_uri * sizeof(struct lttng_uri); | |
4056 | ||
4057 | if (nb_uri > 0) { | |
4058 | uris = zmalloc(len); | |
4059 | if (uris == NULL) { | |
4060 | ret = LTTNG_ERR_FATAL; | |
4061 | goto error; | |
4062 | } | |
4063 | ||
4064 | /* Receive variable len data */ | |
4065 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
4066 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
4067 | if (ret <= 0) { | |
4068 | DBG("No URIs received from client... continuing"); | |
4069 | *sock_error = 1; | |
4070 | ret = LTTNG_ERR_SESSION_FAIL; | |
4071 | free(uris); | |
4072 | goto error; | |
4073 | } | |
4074 | ||
4075 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
4076 | DBG("Creating session with ONE network URI is a bad call"); | |
4077 | ret = LTTNG_ERR_SESSION_FAIL; | |
4078 | free(uris); | |
4079 | goto error; | |
4080 | } | |
4081 | } | |
4082 | ||
4083 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4084 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4085 | free(uris); | |
4086 | break; | |
4087 | } | |
fb198a11 JG |
4088 | case LTTNG_SAVE_SESSION: |
4089 | { | |
4090 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4091 | &cmd_ctx->creds); | |
4092 | break; | |
4093 | } | |
d7ba1388 MD |
4094 | case LTTNG_SET_SESSION_SHM_PATH: |
4095 | { | |
4096 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4097 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4098 | break; | |
4099 | } | |
eded6438 | 4100 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4101 | { |
eded6438 | 4102 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4103 | break; |
4104 | } | |
c2561365 JD |
4105 | case LTTNG_REGENERATE_STATEDUMP: |
4106 | { | |
4107 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4108 | break; | |
4109 | } | |
b3530820 JG |
4110 | case LTTNG_REGISTER_TRIGGER: |
4111 | { | |
4112 | ret = cmd_register_trigger(cmd_ctx, sock, | |
4113 | notification_thread_handle); | |
4114 | break; | |
4115 | } | |
4116 | case LTTNG_UNREGISTER_TRIGGER: | |
4117 | { | |
4118 | ret = cmd_unregister_trigger(cmd_ctx, sock, | |
4119 | notification_thread_handle); | |
4120 | break; | |
4121 | } | |
5c408ad8 JD |
4122 | case LTTNG_ROTATE_SESSION: |
4123 | { | |
4124 | struct lttng_rotate_session_return rotate_return; | |
4125 | ||
4126 | DBG("Client rotate session \"%s\"", cmd_ctx->session->name); | |
4127 | ||
d68c9a04 | 4128 | memset(&rotate_return, 0, sizeof(rotate_return)); |
5c408ad8 JD |
4129 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { |
4130 | DBG("Kernel tracer version is not compatible with the rotation feature"); | |
4131 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4132 | goto error; | |
4133 | } | |
4134 | ||
4135 | ret = cmd_rotate_session(cmd_ctx->session, &rotate_return); | |
4136 | if (ret < 0) { | |
4137 | ret = -ret; | |
4138 | goto error; | |
4139 | } | |
4140 | ||
4141 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &rotate_return, | |
4142 | sizeof(rotate_return)); | |
4143 | if (ret < 0) { | |
4144 | ret = -ret; | |
4145 | goto error; | |
4146 | } | |
4147 | ||
4148 | ret = LTTNG_OK; | |
4149 | break; | |
4150 | } | |
d68c9a04 | 4151 | case LTTNG_ROTATION_GET_INFO: |
5c408ad8 | 4152 | { |
d68c9a04 | 4153 | struct lttng_rotation_get_info_return get_info_return; |
5c408ad8 | 4154 | |
d68c9a04 JD |
4155 | memset(&get_info_return, 0, sizeof(get_info_return)); |
4156 | ret = cmd_rotate_get_info(cmd_ctx->session, &get_info_return, | |
4157 | cmd_ctx->lsm->u.get_rotation_info.rotation_id); | |
5c408ad8 JD |
4158 | if (ret < 0) { |
4159 | ret = -ret; | |
4160 | goto error; | |
4161 | } | |
4162 | ||
d68c9a04 JD |
4163 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &get_info_return, |
4164 | sizeof(get_info_return)); | |
5c408ad8 JD |
4165 | if (ret < 0) { |
4166 | ret = -ret; | |
4167 | goto error; | |
4168 | } | |
4169 | ||
4170 | ret = LTTNG_OK; | |
4171 | break; | |
4172 | } | |
d68c9a04 | 4173 | case LTTNG_SESSION_GET_CURRENT_OUTPUT: |
5c408ad8 | 4174 | { |
d68c9a04 | 4175 | struct lttng_session_get_current_output_return output_return; |
5c408ad8 | 4176 | |
d68c9a04 JD |
4177 | memset(&output_return, 0, sizeof(output_return)); |
4178 | ret = cmd_session_get_current_output(cmd_ctx->session, | |
4179 | &output_return); | |
5c408ad8 JD |
4180 | if (ret < 0) { |
4181 | ret = -ret; | |
4182 | goto error; | |
4183 | } | |
4184 | ||
d68c9a04 JD |
4185 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &output_return, |
4186 | sizeof(output_return)); | |
5c408ad8 JD |
4187 | if (ret < 0) { |
4188 | ret = -ret; | |
4189 | goto error; | |
4190 | } | |
4191 | ||
4192 | ret = LTTNG_OK; | |
4193 | break; | |
4194 | } | |
259c2674 JD |
4195 | case LTTNG_ROTATION_SET_SCHEDULE: |
4196 | { | |
4197 | if (cmd_ctx->session->kernel_session && !check_rotate_compatible()) { | |
4198 | DBG("Kernel tracer version does not support session rotations"); | |
4199 | ret = LTTNG_ERR_ROTATION_WRONG_VERSION; | |
4200 | goto error; | |
4201 | } | |
4202 | ||
4203 | ret = cmd_rotation_set_schedule(cmd_ctx->session, | |
4204 | cmd_ctx->lsm->u.rotate_setup.timer_us, | |
90936dcf JD |
4205 | cmd_ctx->lsm->u.rotate_setup.size, |
4206 | notification_thread_handle); | |
a2026546 | 4207 | if (ret != LTTNG_OK) { |
259c2674 JD |
4208 | goto error; |
4209 | } | |
4210 | ||
259c2674 JD |
4211 | break; |
4212 | } | |
329f3443 JD |
4213 | case LTTNG_ROTATION_SCHEDULE_GET_TIMER_PERIOD: |
4214 | { | |
4215 | struct lttng_rotation_schedule_get_timer_period *get_timer; | |
4216 | ||
4217 | get_timer = zmalloc(sizeof(struct lttng_rotation_schedule_get_timer_period)); | |
4218 | if (!get_timer) { | |
4219 | ret = ENOMEM; | |
4220 | goto error; | |
4221 | } | |
4222 | get_timer->rotate_timer = cmd_ctx->session->rotate_timer_period; | |
4223 | ||
4224 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_timer, | |
4225 | sizeof(struct lttng_rotation_schedule_get_timer_period)); | |
4226 | free(get_timer); | |
4227 | if (ret < 0) { | |
4228 | ret = -ret; | |
4229 | goto error; | |
4230 | } | |
4231 | ||
4232 | ret = LTTNG_OK; | |
4233 | break; | |
4234 | } | |
4235 | case LTTNG_ROTATION_SCHEDULE_GET_SIZE: | |
4236 | { | |
4237 | struct lttng_rotation_schedule_get_size *get_size; | |
4238 | ||
4239 | get_size = zmalloc(sizeof(struct lttng_rotation_schedule_get_size)); | |
4240 | if (!get_size) { | |
4241 | ret = ENOMEM; | |
4242 | goto error; | |
4243 | } | |
4244 | get_size->rotate_size = cmd_ctx->session->rotate_size; | |
4245 | ||
4246 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, get_size, | |
4247 | sizeof(struct lttng_rotation_schedule_get_size)); | |
4248 | free(get_size); | |
4249 | if (ret < 0) { | |
4250 | ret = -ret; | |
4251 | goto error; | |
4252 | } | |
4253 | ||
4254 | ret = LTTNG_OK; | |
4255 | break; | |
4256 | } | |
5e16da05 | 4257 | default: |
f73fabfd | 4258 | ret = LTTNG_ERR_UND; |
5461b305 | 4259 | break; |
fac6795d DG |
4260 | } |
4261 | ||
5461b305 | 4262 | error: |
5461b305 DG |
4263 | if (cmd_ctx->llm == NULL) { |
4264 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4265 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4266 | goto setup_error; |
4267 | } | |
4268 | } | |
54d01ffb | 4269 | /* Set return code */ |
5461b305 | 4270 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4271 | setup_error: |
b5541356 | 4272 | if (cmd_ctx->session) { |
54d01ffb | 4273 | session_unlock(cmd_ctx->session); |
b5541356 | 4274 | } |
256a5576 MD |
4275 | if (need_tracing_session) { |
4276 | session_unlock_list(); | |
4277 | } | |
54d01ffb | 4278 | init_setup_error: |
3745d315 | 4279 | assert(!rcu_read_ongoing()); |
8028d920 | 4280 | return ret; |
fac6795d DG |
4281 | } |
4282 | ||
44a5e5eb DG |
4283 | /* |
4284 | * Thread managing health check socket. | |
4285 | */ | |
4286 | static void *thread_manage_health(void *data) | |
4287 | { | |
eb4a2943 | 4288 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4289 | uint32_t revents, nb_fd; |
4290 | struct lttng_poll_event events; | |
0c89d795 MD |
4291 | struct health_comm_msg msg; |
4292 | struct health_comm_reply reply; | |
44a5e5eb DG |
4293 | |
4294 | DBG("[thread] Manage health check started"); | |
4295 | ||
4296 | rcu_register_thread(); | |
4297 | ||
6d737ce4 DG |
4298 | /* We might hit an error path before this is created. */ |
4299 | lttng_poll_init(&events); | |
3cc04881 | 4300 | |
44a5e5eb | 4301 | /* Create unix socket */ |
e6142f2e | 4302 | sock = lttcomm_create_unix_sock(config.health_unix_sock_path.value); |
44a5e5eb DG |
4303 | if (sock < 0) { |
4304 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4305 | goto error; |
4306 | } | |
4307 | ||
6c71277b MD |
4308 | if (is_root) { |
4309 | /* lttng health client socket path permissions */ | |
e6142f2e JG |
4310 | ret = chown(config.health_unix_sock_path.value, 0, |
4311 | utils_get_group_id(config.tracing_group_name.value)); | |
6c71277b | 4312 | if (ret < 0) { |
e6142f2e | 4313 | ERR("Unable to set group on %s", config.health_unix_sock_path.value); |
6c71277b | 4314 | PERROR("chown"); |
6c71277b MD |
4315 | goto error; |
4316 | } | |
4317 | ||
e6142f2e | 4318 | ret = chmod(config.health_unix_sock_path.value, |
6c71277b MD |
4319 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
4320 | if (ret < 0) { | |
e6142f2e | 4321 | ERR("Unable to set permissions on %s", config.health_unix_sock_path.value); |
6c71277b | 4322 | PERROR("chmod"); |
6c71277b MD |
4323 | goto error; |
4324 | } | |
4325 | } | |
4326 | ||
b662582b DG |
4327 | /* |
4328 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4329 | * show must go on. | |
4330 | */ | |
4331 | (void) utils_set_fd_cloexec(sock); | |
4332 | ||
44a5e5eb DG |
4333 | ret = lttcomm_listen_unix_sock(sock); |
4334 | if (ret < 0) { | |
4335 | goto error; | |
4336 | } | |
4337 | ||
4338 | /* | |
4339 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4340 | * more will be added to this poll set. | |
4341 | */ | |
d0b96690 | 4342 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4343 | if (ret < 0) { |
4344 | goto error; | |
4345 | } | |
4346 | ||
4347 | /* Add the application registration socket */ | |
4348 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4349 | if (ret < 0) { | |
4350 | goto error; | |
4351 | } | |
4352 | ||
ef367a93 | 4353 | sessiond_notify_ready(); |
97bc1426 | 4354 | |
44a5e5eb DG |
4355 | while (1) { |
4356 | DBG("Health check ready"); | |
4357 | ||
44a5e5eb DG |
4358 | /* Inifinite blocking call, waiting for transmission */ |
4359 | restart: | |
4360 | ret = lttng_poll_wait(&events, -1); | |
4361 | if (ret < 0) { | |
4362 | /* | |
4363 | * Restart interrupted system call. | |
4364 | */ | |
4365 | if (errno == EINTR) { | |
4366 | goto restart; | |
4367 | } | |
4368 | goto error; | |
4369 | } | |
4370 | ||
0d9c5d77 DG |
4371 | nb_fd = ret; |
4372 | ||
44a5e5eb DG |
4373 | for (i = 0; i < nb_fd; i++) { |
4374 | /* Fetch once the poll data */ | |
4375 | revents = LTTNG_POLL_GETEV(&events, i); | |
4376 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4377 | ||
fd20dac9 MD |
4378 | if (!revents) { |
4379 | /* No activity for this FD (poll implementation). */ | |
4380 | continue; | |
4381 | } | |
4382 | ||
44a5e5eb | 4383 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4384 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4385 | if (ret) { |
139ac872 MD |
4386 | err = 0; |
4387 | goto exit; | |
44a5e5eb DG |
4388 | } |
4389 | ||
4390 | /* Event on the registration socket */ | |
4391 | if (pollfd == sock) { | |
03e43155 MD |
4392 | if (revents & LPOLLIN) { |
4393 | continue; | |
4394 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4395 | ERR("Health socket poll error"); |
4396 | goto error; | |
03e43155 MD |
4397 | } else { |
4398 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4399 | goto error; | |
44a5e5eb DG |
4400 | } |
4401 | } | |
4402 | } | |
4403 | ||
4404 | new_sock = lttcomm_accept_unix_sock(sock); | |
4405 | if (new_sock < 0) { | |
4406 | goto error; | |
4407 | } | |
4408 | ||
b662582b DG |
4409 | /* |
4410 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4411 | * show must go on. | |
4412 | */ | |
4413 | (void) utils_set_fd_cloexec(new_sock); | |
4414 | ||
44a5e5eb DG |
4415 | DBG("Receiving data from client for health..."); |
4416 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4417 | if (ret <= 0) { | |
4418 | DBG("Nothing recv() from client... continuing"); | |
4419 | ret = close(new_sock); | |
4420 | if (ret) { | |
4421 | PERROR("close"); | |
4422 | } | |
44a5e5eb DG |
4423 | continue; |
4424 | } | |
4425 | ||
4426 | rcu_thread_online(); | |
4427 | ||
53efb85a | 4428 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4429 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4430 | /* | |
4431 | * health_check_state returns 0 if health is | |
4432 | * bad. | |
4433 | */ | |
4434 | if (!health_check_state(health_sessiond, i)) { | |
4435 | reply.ret_code |= 1ULL << i; | |
4436 | } | |
44a5e5eb DG |
4437 | } |
4438 | ||
6c71277b | 4439 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4440 | |
4441 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4442 | if (ret < 0) { | |
4443 | ERR("Failed to send health data back to client"); | |
4444 | } | |
4445 | ||
4446 | /* End of transmission */ | |
4447 | ret = close(new_sock); | |
4448 | if (ret) { | |
4449 | PERROR("close"); | |
4450 | } | |
44a5e5eb DG |
4451 | } |
4452 | ||
139ac872 | 4453 | exit: |
44a5e5eb | 4454 | error: |
139ac872 MD |
4455 | if (err) { |
4456 | ERR("Health error occurred in %s", __func__); | |
4457 | } | |
44a5e5eb | 4458 | DBG("Health check thread dying"); |
e6142f2e | 4459 | unlink(config.health_unix_sock_path.value); |
44a5e5eb DG |
4460 | if (sock >= 0) { |
4461 | ret = close(sock); | |
4462 | if (ret) { | |
4463 | PERROR("close"); | |
4464 | } | |
4465 | } | |
44a5e5eb DG |
4466 | |
4467 | lttng_poll_clean(&events); | |
b11d6a7f | 4468 | stop_threads(); |
44a5e5eb DG |
4469 | rcu_unregister_thread(); |
4470 | return NULL; | |
4471 | } | |
4472 | ||
1d4b027a | 4473 | /* |
d063d709 DG |
4474 | * This thread manage all clients request using the unix client socket for |
4475 | * communication. | |
1d4b027a DG |
4476 | */ |
4477 | static void *thread_manage_clients(void *data) | |
4478 | { | |
139ac872 | 4479 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4480 | int sock_error; |
5eb91c98 | 4481 | uint32_t revents, nb_fd; |
273ea72c | 4482 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4483 | struct lttng_poll_event events; |
1d4b027a DG |
4484 | |
4485 | DBG("[thread] Manage client started"); | |
4486 | ||
f6a9efaa DG |
4487 | rcu_register_thread(); |
4488 | ||
6c71277b | 4489 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4490 | |
840cb59c | 4491 | health_code_update(); |
44a5e5eb | 4492 | |
1d4b027a DG |
4493 | ret = lttcomm_listen_unix_sock(client_sock); |
4494 | if (ret < 0) { | |
35df2755 | 4495 | goto error_listen; |
1d4b027a DG |
4496 | } |
4497 | ||
5eb91c98 DG |
4498 | /* |
4499 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4500 | * more will be added to this poll set. | |
4501 | */ | |
d0b96690 | 4502 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4503 | if (ret < 0) { |
35df2755 | 4504 | goto error_create_poll; |
5eb91c98 | 4505 | } |
273ea72c | 4506 | |
5eb91c98 DG |
4507 | /* Add the application registration socket */ |
4508 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4509 | if (ret < 0) { | |
4510 | goto error; | |
4511 | } | |
273ea72c | 4512 | |
ef367a93 JG |
4513 | sessiond_notify_ready(); |
4514 | ret = sem_post(&load_info->message_thread_ready); | |
4515 | if (ret) { | |
4516 | PERROR("sem_post message_thread_ready"); | |
4517 | goto error; | |
4518 | } | |
0bb7724a | 4519 | |
72453c8c MD |
4520 | /* This testpoint is after we signal readiness to the parent. */ |
4521 | if (testpoint(sessiond_thread_manage_clients)) { | |
4522 | goto error; | |
4523 | } | |
4524 | ||
e547b070 | 4525 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4526 | goto error; |
4527 | } | |
8ac94142 | 4528 | |
840cb59c | 4529 | health_code_update(); |
44a5e5eb | 4530 | |
1d4b027a | 4531 | while (1) { |
1d4b027a | 4532 | DBG("Accepting client command ..."); |
273ea72c DG |
4533 | |
4534 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4535 | restart: |
a78af745 | 4536 | health_poll_entry(); |
5eb91c98 | 4537 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4538 | health_poll_exit(); |
273ea72c | 4539 | if (ret < 0) { |
88f2b785 MD |
4540 | /* |
4541 | * Restart interrupted system call. | |
4542 | */ | |
4543 | if (errno == EINTR) { | |
4544 | goto restart; | |
4545 | } | |
273ea72c DG |
4546 | goto error; |
4547 | } | |
4548 | ||
0d9c5d77 DG |
4549 | nb_fd = ret; |
4550 | ||
5eb91c98 DG |
4551 | for (i = 0; i < nb_fd; i++) { |
4552 | /* Fetch once the poll data */ | |
4553 | revents = LTTNG_POLL_GETEV(&events, i); | |
4554 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4555 | ||
840cb59c | 4556 | health_code_update(); |
44a5e5eb | 4557 | |
fd20dac9 MD |
4558 | if (!revents) { |
4559 | /* No activity for this FD (poll implementation). */ | |
4560 | continue; | |
4561 | } | |
4562 | ||
5eb91c98 | 4563 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4564 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4565 | if (ret) { |
139ac872 MD |
4566 | err = 0; |
4567 | goto exit; | |
5eb91c98 DG |
4568 | } |
4569 | ||
4570 | /* Event on the registration socket */ | |
4571 | if (pollfd == client_sock) { | |
03e43155 MD |
4572 | if (revents & LPOLLIN) { |
4573 | continue; | |
4574 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4575 | ERR("Client socket poll error"); |
4576 | goto error; | |
03e43155 MD |
4577 | } else { |
4578 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4579 | goto error; | |
5eb91c98 DG |
4580 | } |
4581 | } | |
4582 | } | |
4583 | ||
4584 | DBG("Wait for client response"); | |
4585 | ||
840cb59c | 4586 | health_code_update(); |
44a5e5eb | 4587 | |
5eb91c98 DG |
4588 | sock = lttcomm_accept_unix_sock(client_sock); |
4589 | if (sock < 0) { | |
273ea72c | 4590 | goto error; |
273ea72c DG |
4591 | } |
4592 | ||
b662582b DG |
4593 | /* |
4594 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4595 | * show must go on. | |
4596 | */ | |
4597 | (void) utils_set_fd_cloexec(sock); | |
4598 | ||
be040666 DG |
4599 | /* Set socket option for credentials retrieval */ |
4600 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4601 | if (ret < 0) { | |
4602 | goto error; | |
4603 | } | |
4604 | ||
5eb91c98 | 4605 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4606 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4607 | if (cmd_ctx == NULL) { |
76d7553f | 4608 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4609 | goto error; |
5eb91c98 | 4610 | } |
1d4b027a | 4611 | |
5eb91c98 | 4612 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4613 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4614 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4615 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4616 | goto error; |
4617 | } | |
1d4b027a | 4618 | |
5eb91c98 DG |
4619 | cmd_ctx->llm = NULL; |
4620 | cmd_ctx->session = NULL; | |
1d4b027a | 4621 | |
840cb59c | 4622 | health_code_update(); |
44a5e5eb | 4623 | |
5eb91c98 DG |
4624 | /* |
4625 | * Data is received from the lttng client. The struct | |
4626 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4627 | * the client. | |
4628 | */ | |
4629 | DBG("Receiving data from client ..."); | |
be040666 DG |
4630 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4631 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4632 | if (ret <= 0) { |
4633 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4634 | ret = close(sock); |
4635 | if (ret) { | |
4636 | PERROR("close"); | |
4637 | } | |
4638 | sock = -1; | |
a2c0da86 | 4639 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4640 | continue; |
4641 | } | |
1d4b027a | 4642 | |
840cb59c | 4643 | health_code_update(); |
44a5e5eb | 4644 | |
5eb91c98 DG |
4645 | // TODO: Validate cmd_ctx including sanity check for |
4646 | // security purpose. | |
f7776ea7 | 4647 | |
f6a9efaa | 4648 | rcu_thread_online(); |
5eb91c98 DG |
4649 | /* |
4650 | * This function dispatch the work to the kernel or userspace tracer | |
4651 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4652 | * informations for the client. The command context struct contains | |
4653 | * everything this function may needs. | |
4654 | */ | |
53a80697 | 4655 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4656 | rcu_thread_offline(); |
5eb91c98 | 4657 | if (ret < 0) { |
36134aa1 DG |
4658 | ret = close(sock); |
4659 | if (ret) { | |
4660 | PERROR("close"); | |
53a80697 | 4661 | } |
36134aa1 | 4662 | sock = -1; |
bbd973c2 | 4663 | /* |
5eb91c98 | 4664 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4665 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4666 | * (ENOMEM). Error detected but still accept |
4667 | * command, unless a socket error has been | |
4668 | * detected. | |
bbd973c2 | 4669 | */ |
bbd973c2 | 4670 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4671 | continue; |
4672 | } | |
d6e4fca4 | 4673 | |
840cb59c | 4674 | health_code_update(); |
44a5e5eb | 4675 | |
a1ac8b97 | 4676 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4677 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4678 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4679 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4680 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4681 | if (ret < 0) { |
4682 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4683 | } |
1d4b027a | 4684 | |
5eb91c98 | 4685 | /* End of transmission */ |
76d7553f MD |
4686 | ret = close(sock); |
4687 | if (ret) { | |
4688 | PERROR("close"); | |
4689 | } | |
4690 | sock = -1; | |
be040666 DG |
4691 | |
4692 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4693 | |
840cb59c | 4694 | health_code_update(); |
273ea72c DG |
4695 | } |
4696 | ||
139ac872 | 4697 | exit: |
5eb91c98 | 4698 | error: |
35df2755 CB |
4699 | if (sock >= 0) { |
4700 | ret = close(sock); | |
4701 | if (ret) { | |
4702 | PERROR("close"); | |
4703 | } | |
139ac872 | 4704 | } |
44a5e5eb | 4705 | |
35df2755 CB |
4706 | lttng_poll_clean(&events); |
4707 | clean_command_ctx(&cmd_ctx); | |
4708 | ||
4709 | error_listen: | |
4710 | error_create_poll: | |
e6142f2e | 4711 | unlink(config.client_unix_sock_path.value); |
76d7553f MD |
4712 | if (client_sock >= 0) { |
4713 | ret = close(client_sock); | |
4714 | if (ret) { | |
4715 | PERROR("close"); | |
4716 | } | |
a4b35e07 | 4717 | } |
35df2755 CB |
4718 | |
4719 | if (err) { | |
840cb59c | 4720 | health_error(); |
35df2755 | 4721 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4722 | } |
273ea72c | 4723 | |
8782cc74 | 4724 | health_unregister(health_sessiond); |
35df2755 CB |
4725 | |
4726 | DBG("Client thread dying"); | |
f6a9efaa DG |
4727 | |
4728 | rcu_unregister_thread(); | |
4a15001e MD |
4729 | |
4730 | /* | |
4731 | * Since we are creating the consumer threads, we own them, so we need | |
4732 | * to join them before our thread exits. | |
4733 | */ | |
4734 | ret = join_consumer_thread(&kconsumer_data); | |
4735 | if (ret) { | |
4736 | errno = ret; | |
4737 | PERROR("join_consumer"); | |
4738 | } | |
4739 | ||
4740 | ret = join_consumer_thread(&ustconsumer32_data); | |
4741 | if (ret) { | |
4742 | errno = ret; | |
4743 | PERROR("join_consumer ust32"); | |
4744 | } | |
4745 | ||
4746 | ret = join_consumer_thread(&ustconsumer64_data); | |
4747 | if (ret) { | |
4748 | errno = ret; | |
4749 | PERROR("join_consumer ust64"); | |
4750 | } | |
1d4b027a DG |
4751 | return NULL; |
4752 | } | |
4753 | ||
c0232ea5 JG |
4754 | static int string_match(const char *str1, const char *str2) |
4755 | { | |
4756 | return (str1 && str2) && !strcmp(str1, str2); | |
4757 | } | |
4758 | ||
fac6795d | 4759 | /* |
26296c48 JG |
4760 | * Take an option from the getopt output and set it in the right variable to be |
4761 | * used later. | |
4762 | * | |
4763 | * Return 0 on success else a negative value. | |
fac6795d | 4764 | */ |
26296c48 | 4765 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4766 | { |
26296c48 | 4767 | int ret = 0; |
fac6795d | 4768 | |
c0232ea5 | 4769 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4770 | if (!arg || *arg == '\0') { |
4771 | ret = -EINVAL; | |
4772 | goto end; | |
4773 | } | |
e8fa9fb0 MD |
4774 | if (lttng_is_setuid_setgid()) { |
4775 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4776 | "-c, --client-sock"); | |
4777 | } else { | |
e6142f2e JG |
4778 | config_string_set(&config.client_unix_sock_path, |
4779 | strdup(arg)); | |
4780 | if (!config.client_unix_sock_path.value) { | |
4781 | ret = -ENOMEM; | |
4782 | PERROR("strdup"); | |
4783 | } | |
e8fa9fb0 | 4784 | } |
c0232ea5 | 4785 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4786 | if (!arg || *arg == '\0') { |
4787 | ret = -EINVAL; | |
4788 | goto end; | |
4789 | } | |
e8fa9fb0 MD |
4790 | if (lttng_is_setuid_setgid()) { |
4791 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4792 | "-a, --apps-sock"); | |
4793 | } else { | |
e6142f2e JG |
4794 | config_string_set(&config.apps_unix_sock_path, |
4795 | strdup(arg)); | |
4796 | if (!config.apps_unix_sock_path.value) { | |
4797 | ret = -ENOMEM; | |
4798 | PERROR("strdup"); | |
4799 | } | |
e8fa9fb0 | 4800 | } |
c0232ea5 | 4801 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 4802 | config.daemonize = true; |
c0232ea5 | 4803 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 4804 | config.background = true; |
c0232ea5 | 4805 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4806 | if (!arg || *arg == '\0') { |
4807 | ret = -EINVAL; | |
4808 | goto end; | |
4809 | } | |
e8fa9fb0 MD |
4810 | if (lttng_is_setuid_setgid()) { |
4811 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4812 | "-g, --group"); | |
4813 | } else { | |
e6142f2e JG |
4814 | config_string_set(&config.tracing_group_name, |
4815 | strdup(arg)); | |
4816 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 4817 | ret = -ENOMEM; |
e6142f2e | 4818 | PERROR("strdup"); |
e8fa9fb0 | 4819 | } |
db322c4d | 4820 | } |
c0232ea5 | 4821 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 4822 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 4823 | if (ret) { |
4fc83d94 | 4824 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
4825 | perror("exec"); |
4826 | } | |
4827 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 4828 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4829 | fprintf(stdout, "%s\n", VERSION); |
4830 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4831 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 4832 | config.sig_parent = true; |
c0232ea5 | 4833 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
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 | "--kconsumerd-err-sock"); | |
4841 | } else { | |
e6142f2e JG |
4842 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
4843 | strdup(arg)); | |
4844 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
4845 | ret = -ENOMEM; | |
4846 | PERROR("strdup"); | |
4847 | } | |
e8fa9fb0 | 4848 | } |
c0232ea5 | 4849 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
4850 | if (!arg || *arg == '\0') { |
4851 | ret = -EINVAL; | |
4852 | goto end; | |
4853 | } | |
e8fa9fb0 MD |
4854 | if (lttng_is_setuid_setgid()) { |
4855 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4856 | "--kconsumerd-cmd-sock"); | |
4857 | } else { | |
e6142f2e JG |
4858 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
4859 | strdup(arg)); | |
4860 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
4861 | ret = -ENOMEM; | |
4862 | PERROR("strdup"); | |
4863 | } | |
e8fa9fb0 | 4864 | } |
c0232ea5 | 4865 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
4866 | if (!arg || *arg == '\0') { |
4867 | ret = -EINVAL; | |
4868 | goto end; | |
4869 | } | |
e8fa9fb0 MD |
4870 | if (lttng_is_setuid_setgid()) { |
4871 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4872 | "--ustconsumerd64-err-sock"); | |
4873 | } else { | |
e6142f2e JG |
4874 | config_string_set(&config.consumerd64_err_unix_sock_path, |
4875 | strdup(arg)); | |
4876 | if (!config.consumerd64_err_unix_sock_path.value) { | |
4877 | ret = -ENOMEM; | |
4878 | PERROR("strdup"); | |
4879 | } | |
e8fa9fb0 | 4880 | } |
c0232ea5 | 4881 | } else if (string_match(optname, "ustconsumerd64-cmd-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 | "--ustconsumerd64-cmd-sock"); | |
4889 | } else { | |
e6142f2e JG |
4890 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
4891 | strdup(arg)); | |
4892 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
4893 | ret = -ENOMEM; | |
4894 | PERROR("strdup"); | |
4895 | } | |
e8fa9fb0 | 4896 | } |
c0232ea5 | 4897 | } else if (string_match(optname, "ustconsumerd32-err-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 | "--ustconsumerd32-err-sock"); | |
4905 | } else { | |
e6142f2e JG |
4906 | config_string_set(&config.consumerd32_err_unix_sock_path, |
4907 | strdup(arg)); | |
4908 | if (!config.consumerd32_err_unix_sock_path.value) { | |
4909 | ret = -ENOMEM; | |
4910 | PERROR("strdup"); | |
4911 | } | |
e8fa9fb0 | 4912 | } |
c0232ea5 | 4913 | } else if (string_match(optname, "ustconsumerd32-cmd-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 | "--ustconsumerd32-cmd-sock"); | |
4921 | } else { | |
e6142f2e JG |
4922 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
4923 | strdup(arg)); | |
4924 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
4925 | ret = -ENOMEM; | |
4926 | PERROR("strdup"); | |
4927 | } | |
e8fa9fb0 | 4928 | } |
c0232ea5 | 4929 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 4930 | config.no_kernel = true; |
c0232ea5 | 4931 | } else if (string_match(optname, "quiet") || opt == 'q') { |
6d9a9c65 | 4932 | config.quiet = true; |
c0232ea5 | 4933 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4934 | /* Verbose level can increase using multiple -v */ |
4935 | if (arg) { | |
13755a18 | 4936 | /* Value obtained from config file */ |
e6142f2e | 4937 | config.verbose = config_parse_value(arg); |
26296c48 | 4938 | } else { |
13755a18 | 4939 | /* -v used on command line */ |
e6142f2e | 4940 | config.verbose++; |
26296c48 | 4941 | } |
13755a18 | 4942 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
4943 | config.verbose = config.verbose < 0 ? 0 : |
4944 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 4945 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 4946 | if (arg) { |
e6142f2e | 4947 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 4948 | } else { |
e6142f2e | 4949 | config.verbose_consumer++; |
26296c48 | 4950 | } |
c0232ea5 | 4951 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
4952 | if (!arg || *arg == '\0') { |
4953 | ret = -EINVAL; | |
4954 | goto end; | |
4955 | } | |
e8fa9fb0 MD |
4956 | if (lttng_is_setuid_setgid()) { |
4957 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4958 | "--consumerd32-path"); | |
4959 | } else { | |
e6142f2e JG |
4960 | config_string_set(&config.consumerd32_bin_path, |
4961 | strdup(arg)); | |
4962 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
4963 | PERROR("strdup"); |
4964 | ret = -ENOMEM; | |
4965 | } | |
db322c4d | 4966 | } |
c0232ea5 | 4967 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
4968 | if (!arg || *arg == '\0') { |
4969 | ret = -EINVAL; | |
4970 | goto end; | |
4971 | } | |
e8fa9fb0 MD |
4972 | if (lttng_is_setuid_setgid()) { |
4973 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4974 | "--consumerd32-libdir"); | |
4975 | } else { | |
e6142f2e JG |
4976 | config_string_set(&config.consumerd32_lib_dir, |
4977 | strdup(arg)); | |
4978 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
4979 | PERROR("strdup"); |
4980 | ret = -ENOMEM; | |
4981 | } | |
db322c4d | 4982 | } |
c0232ea5 | 4983 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
4984 | if (!arg || *arg == '\0') { |
4985 | ret = -EINVAL; | |
4986 | goto end; | |
4987 | } | |
e8fa9fb0 MD |
4988 | if (lttng_is_setuid_setgid()) { |
4989 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4990 | "--consumerd64-path"); | |
4991 | } else { | |
e6142f2e JG |
4992 | config_string_set(&config.consumerd64_bin_path, |
4993 | strdup(arg)); | |
4994 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
4995 | PERROR("strdup"); |
4996 | ret = -ENOMEM; | |
4997 | } | |
db322c4d | 4998 | } |
c0232ea5 | 4999 | } else if (string_match(optname, "consumerd64-libdir")) { |
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 | "--consumerd64-libdir"); | |
5007 | } else { | |
e6142f2e JG |
5008 | config_string_set(&config.consumerd64_lib_dir, |
5009 | strdup(arg)); | |
5010 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
5011 | PERROR("strdup"); |
5012 | ret = -ENOMEM; | |
5013 | } | |
db322c4d | 5014 | } |
c0232ea5 | 5015 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
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 | "-p, --pidfile"); | |
5023 | } else { | |
e6142f2e JG |
5024 | config_string_set(&config.pid_file_path, strdup(arg)); |
5025 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
5026 | PERROR("strdup"); |
5027 | ret = -ENOMEM; | |
5028 | } | |
db322c4d | 5029 | } |
c0232ea5 | 5030 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
5031 | if (!arg || *arg == '\0') { |
5032 | ret = -EINVAL; | |
5033 | goto end; | |
5034 | } | |
e8fa9fb0 MD |
5035 | if (lttng_is_setuid_setgid()) { |
5036 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5037 | "--agent-tcp-port"); | |
5038 | } else { | |
5039 | unsigned long v; | |
4d076222 | 5040 | |
e8fa9fb0 MD |
5041 | errno = 0; |
5042 | v = strtoul(arg, NULL, 0); | |
5043 | if (errno != 0 || !isdigit(arg[0])) { | |
5044 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
5045 | return -1; | |
5046 | } | |
5047 | if (v == 0 || v >= 65535) { | |
5048 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
5049 | return -1; | |
5050 | } | |
e6142f2e JG |
5051 | config.agent_tcp_port = (uint32_t) v; |
5052 | DBG3("Agent TCP port set to non default: %u", config.agent_tcp_port); | |
26296c48 | 5053 | } |
c0232ea5 | 5054 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
5055 | if (!arg || *arg == '\0') { |
5056 | ret = -EINVAL; | |
5057 | goto end; | |
5058 | } | |
e8fa9fb0 MD |
5059 | if (lttng_is_setuid_setgid()) { |
5060 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5061 | "-l, --load"); | |
5062 | } else { | |
e6142f2e JG |
5063 | config_string_set(&config.load_session_path, strdup(arg)); |
5064 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
5065 | PERROR("strdup"); |
5066 | ret = -ENOMEM; | |
5067 | } | |
ef367a93 | 5068 | } |
c0232ea5 | 5069 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
5070 | if (!arg || *arg == '\0') { |
5071 | ret = -EINVAL; | |
5072 | goto end; | |
5073 | } | |
e8fa9fb0 MD |
5074 | if (lttng_is_setuid_setgid()) { |
5075 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5076 | "--kmod-probes"); | |
5077 | } else { | |
e6142f2e JG |
5078 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
5079 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
5080 | PERROR("strdup"); |
5081 | ret = -ENOMEM; | |
5082 | } | |
c9d42407 | 5083 | } |
c0232ea5 | 5084 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
5085 | if (!arg || *arg == '\0') { |
5086 | ret = -EINVAL; | |
5087 | goto end; | |
5088 | } | |
e8fa9fb0 MD |
5089 | if (lttng_is_setuid_setgid()) { |
5090 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5091 | "--extra-kmod-probes"); | |
5092 | } else { | |
e6142f2e JG |
5093 | config_string_set(&config.kmod_extra_probes_list, |
5094 | strdup(arg)); | |
5095 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
5096 | PERROR("strdup"); |
5097 | ret = -ENOMEM; | |
5098 | } | |
db322c4d | 5099 | } |
c0232ea5 JG |
5100 | } else if (string_match(optname, "config") || opt == 'f') { |
5101 | /* This is handled in set_options() thus silent skip. */ | |
5102 | goto end; | |
5103 | } else { | |
26296c48 JG |
5104 | /* Unknown option or other error. |
5105 | * Error is printed by getopt, just return */ | |
5106 | ret = -1; | |
5107 | } | |
5108 | ||
f3dd7ce7 | 5109 | end: |
c5d350b2 JG |
5110 | if (ret == -EINVAL) { |
5111 | const char *opt_name = "unknown"; | |
5112 | int i; | |
5113 | ||
5114 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
5115 | i++) { | |
5116 | if (opt == long_options[i].val) { | |
5117 | opt_name = long_options[i].name; | |
5118 | break; | |
5119 | } | |
5120 | } | |
5121 | ||
5122 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
5123 | opt_name); | |
5124 | } | |
f3dd7ce7 | 5125 | |
26296c48 JG |
5126 | return ret; |
5127 | } | |
5128 | ||
5129 | /* | |
5130 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 5131 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
5132 | * return value conventions. |
5133 | */ | |
5134 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
5135 | { | |
5136 | int ret = 0, i; | |
5137 | ||
5138 | if (!entry || !entry->name || !entry->value) { | |
5139 | ret = -EINVAL; | |
5140 | goto end; | |
5141 | } | |
5142 | ||
5143 | /* Check if the option is to be ignored */ | |
5144 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
5145 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
5146 | goto end; | |
5147 | } | |
5148 | } | |
5149 | ||
5150 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
5151 | i++) { | |
5152 | ||
5153 | /* Ignore if not fully matched. */ | |
5154 | if (strcmp(entry->name, long_options[i].name)) { | |
5155 | continue; | |
5156 | } | |
5157 | ||
5158 | /* | |
5159 | * If the option takes no argument on the command line, we have to | |
5160 | * check if the value is "true". We support non-zero numeric values, | |
5161 | * true, on and yes. | |
5162 | */ | |
5163 | if (!long_options[i].has_arg) { | |
5164 | ret = config_parse_value(entry->value); | |
5165 | if (ret <= 0) { | |
5166 | if (ret) { | |
5167 | WARN("Invalid configuration value \"%s\" for option %s", | |
5168 | entry->value, entry->name); | |
5169 | } | |
5170 | /* False, skip boolean config option. */ | |
5171 | goto end; | |
4d076222 | 5172 | } |
26296c48 JG |
5173 | } |
5174 | ||
5175 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
5176 | goto end; | |
5177 | } | |
5178 | ||
5179 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
5180 | ||
5181 | end: | |
5182 | return ret; | |
5183 | } | |
5184 | ||
5185 | /* | |
5186 | * daemon configuration loading and argument parsing | |
5187 | */ | |
5188 | static int set_options(int argc, char **argv) | |
5189 | { | |
5190 | int ret = 0, c = 0, option_index = 0; | |
5191 | int orig_optopt = optopt, orig_optind = optind; | |
5192 | char *optstring; | |
5193 | const char *config_path = NULL; | |
5194 | ||
5195 | optstring = utils_generate_optstring(long_options, | |
5196 | sizeof(long_options) / sizeof(struct option)); | |
5197 | if (!optstring) { | |
5198 | ret = -ENOMEM; | |
5199 | goto end; | |
5200 | } | |
5201 | ||
5202 | /* Check for the --config option */ | |
5203 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
5204 | &option_index)) != -1) { | |
5205 | if (c == '?') { | |
5206 | ret = -EINVAL; | |
5207 | goto end; | |
5208 | } else if (c != 'f') { | |
5209 | /* if not equal to --config option. */ | |
5210 | continue; | |
5211 | } | |
5212 | ||
e8fa9fb0 MD |
5213 | if (lttng_is_setuid_setgid()) { |
5214 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5215 | "-f, --config"); | |
5216 | } else { | |
5217 | config_path = utils_expand_path(optarg); | |
5218 | if (!config_path) { | |
5219 | ERR("Failed to resolve path: %s", optarg); | |
5220 | } | |
26296c48 JG |
5221 | } |
5222 | } | |
5223 | ||
5224 | ret = config_get_section_entries(config_path, config_section_name, | |
5225 | config_entry_handler, NULL); | |
5226 | if (ret) { | |
5227 | if (ret > 0) { | |
5228 | ERR("Invalid configuration option at line %i", ret); | |
5229 | ret = -1; | |
5230 | } | |
5231 | goto end; | |
5232 | } | |
5233 | ||
5234 | /* Reset getopt's global state */ | |
5235 | optopt = orig_optopt; | |
5236 | optind = orig_optind; | |
5237 | while (1) { | |
c0232ea5 JG |
5238 | option_index = -1; |
5239 | /* | |
5240 | * getopt_long() will not set option_index if it encounters a | |
5241 | * short option. | |
5242 | */ | |
5243 | c = getopt_long(argc, argv, optstring, long_options, | |
5244 | &option_index); | |
26296c48 | 5245 | if (c == -1) { |
4d076222 DG |
5246 | break; |
5247 | } | |
26296c48 | 5248 | |
c0232ea5 JG |
5249 | /* |
5250 | * Pass NULL as the long option name if popt left the index | |
5251 | * unset. | |
5252 | */ | |
5253 | ret = set_option(c, optarg, | |
5254 | option_index < 0 ? NULL : | |
5255 | long_options[option_index].name); | |
26296c48 JG |
5256 | if (ret < 0) { |
5257 | break; | |
fac6795d DG |
5258 | } |
5259 | } | |
5260 | ||
26296c48 JG |
5261 | end: |
5262 | free(optstring); | |
5263 | return ret; | |
fac6795d DG |
5264 | } |
5265 | ||
5266 | /* | |
d063d709 | 5267 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5268 | * apps_sock - The communication socket for all UST apps. |
5269 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5270 | */ |
cf3af59e | 5271 | static int init_daemon_socket(void) |
fac6795d DG |
5272 | { |
5273 | int ret = 0; | |
5274 | mode_t old_umask; | |
5275 | ||
5276 | old_umask = umask(0); | |
5277 | ||
5278 | /* Create client tool unix socket */ | |
e6142f2e | 5279 | client_sock = lttcomm_create_unix_sock(config.client_unix_sock_path.value); |
d6f42150 | 5280 | if (client_sock < 0) { |
e6142f2e | 5281 | ERR("Create unix sock failed: %s", config.client_unix_sock_path.value); |
fac6795d DG |
5282 | ret = -1; |
5283 | goto end; | |
5284 | } | |
5285 | ||
b662582b DG |
5286 | /* Set the cloexec flag */ |
5287 | ret = utils_set_fd_cloexec(client_sock); | |
5288 | if (ret < 0) { | |
5289 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5290 | "Continuing but note that the consumer daemon will have a " | |
5291 | "reference to this socket on exec()", client_sock); | |
5292 | } | |
5293 | ||
fac6795d | 5294 | /* File permission MUST be 660 */ |
e6142f2e | 5295 | ret = chmod(config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
fac6795d | 5296 | if (ret < 0) { |
e6142f2e | 5297 | ERR("Set file permissions failed: %s", config.client_unix_sock_path.value); |
76d7553f | 5298 | PERROR("chmod"); |
fac6795d DG |
5299 | goto end; |
5300 | } | |
5301 | ||
5302 | /* Create the application unix socket */ | |
e6142f2e | 5303 | apps_sock = lttcomm_create_unix_sock(config.apps_unix_sock_path.value); |
d6f42150 | 5304 | if (apps_sock < 0) { |
e6142f2e | 5305 | ERR("Create unix sock failed: %s", config.apps_unix_sock_path.value); |
fac6795d DG |
5306 | ret = -1; |
5307 | goto end; | |
5308 | } | |
5309 | ||
b662582b DG |
5310 | /* Set the cloexec flag */ |
5311 | ret = utils_set_fd_cloexec(apps_sock); | |
5312 | if (ret < 0) { | |
5313 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5314 | "Continuing but note that the consumer daemon will have a " | |
5315 | "reference to this socket on exec()", apps_sock); | |
5316 | } | |
5317 | ||
d6f42150 | 5318 | /* File permission MUST be 666 */ |
e6142f2e | 5319 | ret = chmod(config.apps_unix_sock_path.value, |
54d01ffb | 5320 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
fac6795d | 5321 | if (ret < 0) { |
e6142f2e | 5322 | ERR("Set file permissions failed: %s", config.apps_unix_sock_path.value); |
76d7553f | 5323 | PERROR("chmod"); |
fac6795d DG |
5324 | goto end; |
5325 | } | |
5326 | ||
b662582b DG |
5327 | DBG3("Session daemon client socket %d and application socket %d created", |
5328 | client_sock, apps_sock); | |
5329 | ||
fac6795d DG |
5330 | end: |
5331 | umask(old_umask); | |
5332 | return ret; | |
5333 | } | |
5334 | ||
5335 | /* | |
54d01ffb DG |
5336 | * Check if the global socket is available, and if a daemon is answering at the |
5337 | * other side. If yes, error is returned. | |
fac6795d | 5338 | */ |
cf3af59e | 5339 | static int check_existing_daemon(void) |
fac6795d | 5340 | { |
7d8234d9 | 5341 | /* Is there anybody out there ? */ |
099e26bd | 5342 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5343 | return -EEXIST; |
099e26bd | 5344 | } |
b09c7c76 DG |
5345 | |
5346 | return 0; | |
fac6795d DG |
5347 | } |
5348 | ||
fac6795d | 5349 | /* |
d063d709 | 5350 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5351 | * |
d063d709 | 5352 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5353 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5354 | */ |
be040666 | 5355 | static int set_permissions(char *rundir) |
fac6795d DG |
5356 | { |
5357 | int ret; | |
996b65c8 | 5358 | gid_t gid; |
fac6795d | 5359 | |
e6142f2e | 5360 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 5361 | |
d6f42150 | 5362 | /* Set lttng run dir */ |
be040666 | 5363 | ret = chown(rundir, 0, gid); |
d6f42150 | 5364 | if (ret < 0) { |
be040666 | 5365 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5366 | PERROR("chown"); |
d6f42150 DG |
5367 | } |
5368 | ||
6c71277b MD |
5369 | /* |
5370 | * Ensure all applications and tracing group can search the run | |
5371 | * dir. Allow everyone to read the directory, since it does not | |
5372 | * buy us anything to hide its content. | |
5373 | */ | |
5374 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5375 | if (ret < 0) { |
5376 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5377 | PERROR("chmod"); |
d1613cf5 JN |
5378 | } |
5379 | ||
d6f42150 | 5380 | /* lttng client socket path */ |
e6142f2e | 5381 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 5382 | if (ret < 0) { |
e6142f2e | 5383 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 5384 | PERROR("chown"); |
d6f42150 DG |
5385 | } |
5386 | ||
3bd1e081 | 5387 | /* kconsumer error socket path */ |
6c71277b | 5388 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5389 | if (ret < 0) { |
3bd1e081 | 5390 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5391 | PERROR("chown"); |
3bd1e081 MD |
5392 | } |
5393 | ||
7753dea8 | 5394 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5395 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5396 | if (ret < 0) { |
5397 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5398 | PERROR("chown"); |
7753dea8 MD |
5399 | } |
5400 | ||
5401 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5402 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5403 | if (ret < 0) { |
7753dea8 | 5404 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5405 | PERROR("chown"); |
fac6795d DG |
5406 | } |
5407 | ||
d6f42150 | 5408 | DBG("All permissions are set"); |
e07ae692 | 5409 | |
fac6795d DG |
5410 | return ret; |
5411 | } | |
5412 | ||
d6f42150 | 5413 | /* |
d063d709 | 5414 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5415 | */ |
e6142f2e | 5416 | static int create_lttng_rundir(void) |
d6f42150 DG |
5417 | { |
5418 | int ret; | |
5419 | ||
e6142f2e | 5420 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 5421 | |
e6142f2e | 5422 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 5423 | if (ret < 0) { |
b1f11e69 | 5424 | if (errno != EEXIST) { |
e6142f2e | 5425 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
5426 | goto error; |
5427 | } else { | |
5428 | ret = 0; | |
5429 | } | |
d6f42150 DG |
5430 | } |
5431 | ||
5432 | error: | |
5433 | return ret; | |
5434 | } | |
5435 | ||
5436 | /* | |
e6142f2e | 5437 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 5438 | * session daemon. |
d6f42150 | 5439 | */ |
e6142f2e | 5440 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
5441 | { |
5442 | int ret; | |
e6142f2e | 5443 | char *path = NULL; |
d6f42150 | 5444 | |
6c71277b | 5445 | switch (consumer_data->type) { |
7753dea8 | 5446 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 5447 | path = config.kconsumerd_path.value; |
7753dea8 MD |
5448 | break; |
5449 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 5450 | path = config.consumerd64_path.value; |
7753dea8 MD |
5451 | break; |
5452 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 5453 | path = config.consumerd32_path.value; |
7753dea8 MD |
5454 | break; |
5455 | default: | |
5456 | ERR("Consumer type unknown"); | |
5457 | ret = -EINVAL; | |
5458 | goto error; | |
d6f42150 | 5459 | } |
e6142f2e | 5460 | assert(path); |
d6f42150 | 5461 | |
67e40797 DG |
5462 | DBG2("Creating consumer directory: %s", path); |
5463 | ||
6c71277b | 5464 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
5465 | if (ret < 0 && errno != EEXIST) { |
5466 | PERROR("mkdir"); | |
5467 | ERR("Failed to create %s", path); | |
5468 | goto error; | |
d6f42150 | 5469 | } |
6c71277b | 5470 | if (is_root) { |
e6142f2e | 5471 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
5472 | if (ret < 0) { |
5473 | ERR("Unable to set group on %s", path); | |
5474 | PERROR("chown"); | |
5475 | goto error; | |
5476 | } | |
5477 | } | |
d6f42150 | 5478 | |
e6142f2e | 5479 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
5480 | consumer_data->err_sock = |
5481 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5482 | if (consumer_data->err_sock < 0) { | |
5483 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5484 | ret = -1; |
5485 | goto error; | |
5486 | } | |
5487 | ||
a24f05ab MD |
5488 | /* |
5489 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5490 | * show must go on. | |
5491 | */ | |
5492 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5493 | if (ret < 0) { | |
5494 | PERROR("utils_set_fd_cloexec"); | |
5495 | /* continue anyway */ | |
5496 | } | |
5497 | ||
d6f42150 | 5498 | /* File permission MUST be 660 */ |
3bd1e081 | 5499 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5500 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5501 | if (ret < 0) { |
3bd1e081 | 5502 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5503 | PERROR("chmod"); |
d6f42150 DG |
5504 | goto error; |
5505 | } | |
5506 | ||
5507 | error: | |
5508 | return ret; | |
5509 | } | |
5510 | ||
fac6795d | 5511 | /* |
d063d709 | 5512 | * Signal handler for the daemon |
cf3af59e | 5513 | * |
54d01ffb DG |
5514 | * Simply stop all worker threads, leaving main() return gracefully after |
5515 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5516 | */ |
5517 | static void sighandler(int sig) | |
5518 | { | |
5519 | switch (sig) { | |
cf3af59e | 5520 | case SIGINT: |
af87c45a | 5521 | DBG("SIGINT caught"); |
cf3af59e MD |
5522 | stop_threads(); |
5523 | break; | |
5524 | case SIGTERM: | |
af87c45a | 5525 | DBG("SIGTERM caught"); |
cf3af59e MD |
5526 | stop_threads(); |
5527 | break; | |
0bb7724a DG |
5528 | case SIGUSR1: |
5529 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5530 | break; | |
cf3af59e MD |
5531 | default: |
5532 | break; | |
fac6795d | 5533 | } |
fac6795d DG |
5534 | } |
5535 | ||
5536 | /* | |
d063d709 | 5537 | * Setup signal handler for : |
1d4b027a | 5538 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5539 | */ |
1d4b027a | 5540 | static int set_signal_handler(void) |
fac6795d | 5541 | { |
1d4b027a DG |
5542 | int ret = 0; |
5543 | struct sigaction sa; | |
5544 | sigset_t sigset; | |
fac6795d | 5545 | |
1d4b027a | 5546 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5547 | PERROR("sigemptyset"); |
1d4b027a DG |
5548 | return ret; |
5549 | } | |
d6f42150 | 5550 | |
1d4b027a DG |
5551 | sa.sa_mask = sigset; |
5552 | sa.sa_flags = 0; | |
0072e5e2 MD |
5553 | |
5554 | sa.sa_handler = sighandler; | |
1d4b027a | 5555 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5556 | PERROR("sigaction"); |
1d4b027a | 5557 | return ret; |
d6f42150 DG |
5558 | } |
5559 | ||
1d4b027a | 5560 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5561 | PERROR("sigaction"); |
1d4b027a | 5562 | return ret; |
d6f42150 | 5563 | } |
aaf26714 | 5564 | |
0072e5e2 | 5565 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5566 | PERROR("sigaction"); |
1d4b027a | 5567 | return ret; |
8c0faa1d DG |
5568 | } |
5569 | ||
0072e5e2 MD |
5570 | sa.sa_handler = SIG_IGN; |
5571 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5572 | PERROR("sigaction"); |
5573 | return ret; | |
5574 | } | |
5575 | ||
5576 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5577 | |
5578 | return ret; | |
fac6795d DG |
5579 | } |
5580 | ||
f3ed775e | 5581 | /* |
d063d709 | 5582 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5583 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5584 | */ |
5585 | static void set_ulimit(void) | |
5586 | { | |
5587 | int ret; | |
5588 | struct rlimit lim; | |
5589 | ||
514bb9f0 | 5590 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5591 | lim.rlim_cur = 65535; |
5592 | lim.rlim_max = 65535; | |
5593 | ||
5594 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5595 | if (ret < 0) { | |
76d7553f | 5596 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5597 | } |
5598 | } | |
5599 | ||
4a15001e | 5600 | static int write_pidfile(void) |
35f90c40 | 5601 | { |
e6142f2e | 5602 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
5603 | } |
5604 | ||
c9cb3e7d JG |
5605 | /* |
5606 | * Create lockfile using the rundir and return its fd. | |
5607 | */ | |
5608 | static int create_lockfile(void) | |
5609 | { | |
e6142f2e | 5610 | return utils_create_lock_file(config.lock_file_path.value); |
c9cb3e7d JG |
5611 | } |
5612 | ||
cd9290dd | 5613 | /* |
022d91ba | 5614 | * Write agent TCP port using the rundir. |
cd9290dd | 5615 | */ |
4a15001e | 5616 | static int write_agent_port(void) |
cd9290dd | 5617 | { |
e6142f2e JG |
5618 | return utils_create_pid_file(config.agent_tcp_port, |
5619 | config.agent_port_file_path.value); | |
5620 | } | |
cd9290dd | 5621 | |
e6142f2e JG |
5622 | static int set_clock_plugin_env(void) |
5623 | { | |
5624 | int ret = 0; | |
5625 | char *env_value = NULL; | |
cd9290dd | 5626 | |
e6142f2e JG |
5627 | if (!config.lttng_ust_clock_plugin.value) { |
5628 | goto end; | |
5629 | } | |
5630 | ||
5631 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
5632 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 5633 | if (ret < 0) { |
e6142f2e JG |
5634 | PERROR("asprintf"); |
5635 | goto end; | |
cd9290dd DG |
5636 | } |
5637 | ||
e6142f2e JG |
5638 | ret = putenv(env_value); |
5639 | if (ret) { | |
5640 | free(env_value); | |
5641 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
5642 | goto end; | |
5643 | } | |
cd9290dd | 5644 | |
e6142f2e JG |
5645 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
5646 | config.lttng_ust_clock_plugin.value); | |
5647 | end: | |
4a15001e | 5648 | return ret; |
ef367a93 JG |
5649 | } |
5650 | ||
d086f507 JD |
5651 | static |
5652 | struct rotation_thread_timer_queue *create_rotate_timer_queue(void) | |
5653 | { | |
5654 | struct rotation_thread_timer_queue *queue = NULL; | |
5655 | ||
5656 | queue = zmalloc(sizeof(struct rotation_thread_timer_queue)); | |
5657 | if (!queue) { | |
5658 | PERROR("Failed to allocate timer rotate queue"); | |
5659 | goto end; | |
5660 | } | |
5661 | ||
5662 | queue->event_pipe = lttng_pipe_open(FD_CLOEXEC | O_NONBLOCK); | |
5663 | CDS_INIT_LIST_HEAD(&queue->list); | |
5664 | pthread_mutex_init(&queue->lock, NULL); | |
5665 | ||
5666 | end: | |
5667 | return queue; | |
5668 | } | |
5669 | ||
5670 | static | |
5671 | void destroy_rotate_timer_queue(struct rotation_thread_timer_queue *queue) | |
5672 | { | |
5673 | struct sessiond_rotation_timer *node, *tmp_node; | |
5674 | ||
5675 | if (!queue) { | |
5676 | return; | |
5677 | } | |
5678 | ||
5679 | lttng_pipe_destroy(queue->event_pipe); | |
5680 | ||
5681 | pthread_mutex_lock(&queue->lock); | |
5682 | /* Empty wait queue. */ | |
5683 | cds_list_for_each_entry_safe(node, tmp_node, &queue->list, head) { | |
5684 | cds_list_del(&node->head); | |
5685 | free(node); | |
5686 | } | |
5687 | pthread_mutex_unlock(&queue->lock); | |
5688 | ||
5689 | pthread_mutex_destroy(&queue->lock); | |
5690 | free(queue); | |
5691 | } | |
5692 | ||
fac6795d DG |
5693 | /* |
5694 | * main | |
5695 | */ | |
5696 | int main(int argc, char **argv) | |
5697 | { | |
4a15001e | 5698 | int ret = 0, retval = 0; |
fac6795d | 5699 | void *status; |
e6142f2e | 5700 | const char *env_app_timeout; |
b3530820 JG |
5701 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
5702 | *ust64_channel_monitor_pipe = NULL, | |
5703 | *kernel_channel_monitor_pipe = NULL; | |
6be1a386 | 5704 | bool notification_thread_running = false; |
db66e574 | 5705 | bool rotation_thread_running = false; |
d086f507 | 5706 | bool timer_thread_running = false; |
62c43103 JD |
5707 | struct lttng_pipe *ust32_channel_rotate_pipe = NULL, |
5708 | *ust64_channel_rotate_pipe = NULL, | |
5709 | *kernel_channel_rotate_pipe = NULL; | |
d086f507 JD |
5710 | struct timer_thread_parameters timer_thread_ctx; |
5711 | /* Queue of rotation jobs populated by the sessiond-timer. */ | |
5712 | struct rotation_thread_timer_queue *rotation_timer_queue = NULL; | |
90936dcf | 5713 | sem_t notification_thread_ready; |
fac6795d | 5714 | |
335a95b7 MD |
5715 | init_kernel_workarounds(); |
5716 | ||
f6a9efaa DG |
5717 | rcu_register_thread(); |
5718 | ||
4a15001e MD |
5719 | if (set_signal_handler()) { |
5720 | retval = -1; | |
5721 | goto exit_set_signal_handler; | |
0bb7724a DG |
5722 | } |
5723 | ||
d086f507 JD |
5724 | if (sessiond_timer_signal_init()) { |
5725 | retval = -1; | |
5726 | goto exit_set_signal_handler; | |
5727 | } | |
5728 | ||
12744796 DG |
5729 | page_size = sysconf(_SC_PAGESIZE); |
5730 | if (page_size < 0) { | |
5731 | PERROR("sysconf _SC_PAGESIZE"); | |
5732 | page_size = LONG_MAX; | |
5733 | WARN("Fallback page size to %ld", page_size); | |
5734 | } | |
5735 | ||
e6142f2e JG |
5736 | ret = sessiond_config_init(&config); |
5737 | if (ret) { | |
5738 | retval = -1; | |
5739 | goto exit_set_signal_handler; | |
5740 | } | |
5741 | ||
4a15001e MD |
5742 | /* |
5743 | * Parse arguments and load the daemon configuration file. | |
5744 | * | |
5745 | * We have an exit_options exit path to free memory reserved by | |
5746 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5747 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5748 | * depends on set_options. | |
5749 | */ | |
fac6795d | 5750 | progname = argv[0]; |
4a15001e MD |
5751 | if (set_options(argc, argv)) { |
5752 | retval = -1; | |
5753 | goto exit_options; | |
fac6795d DG |
5754 | } |
5755 | ||
e6142f2e JG |
5756 | /* Init config from environment variables. */ |
5757 | sessiond_config_apply_env_config(&config); | |
5758 | ||
5759 | /* | |
5760 | * Resolve all paths received as arguments, configuration option, or | |
5761 | * through environment variable as absolute paths. This is necessary | |
5762 | * since daemonizing causes the sessiond's current working directory | |
5763 | * to '/'. | |
5764 | */ | |
5765 | ret = sessiond_config_resolve_paths(&config); | |
5766 | if (ret) { | |
5767 | goto exit_options; | |
5768 | } | |
5769 | ||
5770 | /* Apply config. */ | |
5771 | lttng_opt_verbose = config.verbose; | |
5772 | lttng_opt_quiet = config.quiet; | |
5773 | kconsumer_data.err_unix_sock_path = | |
5774 | config.kconsumerd_err_unix_sock_path.value; | |
5775 | kconsumer_data.cmd_unix_sock_path = | |
5776 | config.kconsumerd_cmd_unix_sock_path.value; | |
5777 | ustconsumer32_data.err_unix_sock_path = | |
5778 | config.consumerd32_err_unix_sock_path.value; | |
5779 | ustconsumer32_data.cmd_unix_sock_path = | |
5780 | config.consumerd32_cmd_unix_sock_path.value; | |
5781 | ustconsumer64_data.err_unix_sock_path = | |
5782 | config.consumerd64_err_unix_sock_path.value; | |
5783 | ustconsumer64_data.cmd_unix_sock_path = | |
5784 | config.consumerd64_cmd_unix_sock_path.value; | |
5785 | set_clock_plugin_env(); | |
5786 | ||
5787 | sessiond_config_log(&config); | |
5788 | ||
fac6795d | 5789 | /* Daemonize */ |
e6142f2e | 5790 | if (config.daemonize || config.background) { |
ceed52b5 MD |
5791 | int i; |
5792 | ||
72dd7491 | 5793 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 5794 | !config.background); |
53094c05 | 5795 | if (ret < 0) { |
4a15001e MD |
5796 | retval = -1; |
5797 | goto exit_options; | |
53094c05 | 5798 | } |
0bb7724a | 5799 | |
ceed52b5 | 5800 | /* |
0bb7724a | 5801 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5802 | * closed, in case we are called with more opened file |
5803 | * descriptors than the standard ones. | |
ceed52b5 MD |
5804 | */ |
5805 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5806 | (void) close(i); | |
5807 | } | |
5808 | } | |
5809 | ||
7567352f MD |
5810 | if (run_as_create_worker(argv[0]) < 0) { |
5811 | goto exit_create_run_as_worker_cleanup; | |
5812 | } | |
5813 | ||
4a15001e MD |
5814 | /* |
5815 | * Starting from here, we can create threads. This needs to be after | |
5816 | * lttng_daemonize due to RCU. | |
5817 | */ | |
5818 | ||
5819 | /* | |
5820 | * Initialize the health check subsystem. This call should set the | |
5821 | * appropriate time values. | |
5822 | */ | |
5823 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5824 | if (!health_sessiond) { | |
5825 | PERROR("health_app_create error"); | |
5826 | retval = -1; | |
5827 | goto exit_health_sessiond_cleanup; | |
5828 | } | |
5829 | ||
4a15001e | 5830 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 5831 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
5832 | retval = -1; |
5833 | goto exit_ht_cleanup; | |
5834 | } | |
5835 | ||
ceed52b5 | 5836 | /* Create thread quit pipe */ |
4a15001e MD |
5837 | if (init_thread_quit_pipe()) { |
5838 | retval = -1; | |
5839 | goto exit_init_data; | |
fac6795d DG |
5840 | } |
5841 | ||
5842 | /* Check if daemon is UID = 0 */ | |
5843 | is_root = !getuid(); | |
5844 | ||
b723c447 JG |
5845 | if (create_lttng_rundir()) { |
5846 | retval = -1; | |
5847 | goto exit_init_data; | |
5848 | } | |
5849 | ||
fac6795d | 5850 | if (is_root) { |
67e40797 | 5851 | /* Create global run dir with root access */ |
67e40797 | 5852 | |
b3530820 JG |
5853 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
5854 | if (!kernel_channel_monitor_pipe) { | |
5855 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
5856 | retval = -1; | |
5857 | goto exit_init_data; | |
5858 | } | |
5859 | kconsumer_data.channel_monitor_pipe = | |
5860 | lttng_pipe_release_writefd( | |
5861 | kernel_channel_monitor_pipe); | |
5862 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
5863 | retval = -1; | |
5864 | goto exit_init_data; | |
5865 | } | |
62c43103 JD |
5866 | kernel_channel_rotate_pipe = lttng_pipe_open(0); |
5867 | if (!kernel_channel_rotate_pipe) { | |
5868 | ERR("Failed to create kernel consumer channel rotate pipe"); | |
5869 | retval = -1; | |
5870 | goto exit_init_data; | |
5871 | } | |
5872 | kconsumer_data.channel_rotate_pipe = | |
5873 | lttng_pipe_release_writefd( | |
5874 | kernel_channel_rotate_pipe); | |
5875 | if (kconsumer_data.channel_rotate_pipe < 0) { | |
5876 | retval = -1; | |
5877 | goto exit_init_data; | |
5878 | } | |
fac6795d DG |
5879 | } |
5880 | ||
c9cb3e7d JG |
5881 | lockfile_fd = create_lockfile(); |
5882 | if (lockfile_fd < 0) { | |
4a15001e MD |
5883 | retval = -1; |
5884 | goto exit_init_data; | |
c9cb3e7d JG |
5885 | } |
5886 | ||
5c827ce0 DG |
5887 | /* Set consumer initial state */ |
5888 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5889 | ust_consumerd_state = CONSUMER_STOPPED; | |
5890 | ||
b3530820 JG |
5891 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
5892 | if (!ust32_channel_monitor_pipe) { | |
5893 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
5894 | retval = -1; | |
5895 | goto exit_init_data; | |
5896 | } | |
5897 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
5898 | ust32_channel_monitor_pipe); | |
5899 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
5900 | retval = -1; | |
5901 | goto exit_init_data; | |
5902 | } | |
62c43103 JD |
5903 | ust32_channel_rotate_pipe = lttng_pipe_open(0); |
5904 | if (!ust32_channel_rotate_pipe) { | |
5905 | ERR("Failed to create 32-bit user space consumer channel rotate pipe"); | |
5906 | retval = -1; | |
5907 | goto exit_init_data; | |
5908 | } | |
5909 | ustconsumer32_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
5910 | ust32_channel_rotate_pipe); | |
5911 | if (ustconsumer32_data.channel_rotate_pipe < 0) { | |
5912 | retval = -1; | |
5913 | goto exit_init_data; | |
5914 | } | |
5915 | ||
d086f507 JD |
5916 | /* |
5917 | * The rotation_timer_queue structure is shared between the sessiond timer | |
5918 | * thread and the rotation thread. The main() keeps the ownership and | |
5919 | * destroys it when both threads have quit. | |
5920 | */ | |
5921 | rotation_timer_queue = create_rotate_timer_queue(); | |
5922 | if (!rotation_timer_queue) { | |
5923 | retval = -1; | |
5924 | goto exit_init_data; | |
5925 | } | |
5926 | timer_thread_ctx.rotation_timer_queue = rotation_timer_queue; | |
67e40797 | 5927 | |
b3530820 JG |
5928 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
5929 | if (!ust64_channel_monitor_pipe) { | |
5930 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
5931 | retval = -1; | |
5932 | goto exit_init_data; | |
5933 | } | |
5934 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
5935 | ust64_channel_monitor_pipe); | |
5936 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
5937 | retval = -1; | |
5938 | goto exit_init_data; | |
5939 | } | |
62c43103 JD |
5940 | ust64_channel_rotate_pipe = lttng_pipe_open(0); |
5941 | if (!ust64_channel_rotate_pipe) { | |
5942 | ERR("Failed to create 64-bit user space consumer channel rotate pipe"); | |
5943 | retval = -1; | |
5944 | goto exit_init_data; | |
5945 | } | |
5946 | ustconsumer64_data.channel_rotate_pipe = lttng_pipe_release_writefd( | |
5947 | ust64_channel_rotate_pipe); | |
5948 | if (ustconsumer64_data.channel_rotate_pipe < 0) { | |
5949 | retval = -1; | |
5950 | goto exit_init_data; | |
5951 | } | |
847177cd | 5952 | |
273ea72c | 5953 | /* |
7d8234d9 | 5954 | * See if daemon already exist. |
fac6795d | 5955 | */ |
4a15001e | 5956 | if (check_existing_daemon()) { |
75462a81 | 5957 | ERR("Already running daemon.\n"); |
273ea72c | 5958 | /* |
cf3af59e MD |
5959 | * We do not goto exit because we must not cleanup() |
5960 | * because a daemon is already running. | |
ab118b20 | 5961 | */ |
4a15001e MD |
5962 | retval = -1; |
5963 | goto exit_init_data; | |
a88df331 DG |
5964 | } |
5965 | ||
1427f9b2 DG |
5966 | /* |
5967 | * Init UST app hash table. Alloc hash table before this point since | |
5968 | * cleanup() can get called after that point. | |
5969 | */ | |
4a15001e | 5970 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 5971 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5972 | retval = -1; |
5973 | goto exit_init_data; | |
5974 | } | |
1427f9b2 | 5975 | |
6a4e4039 JG |
5976 | /* |
5977 | * Initialize agent app hash table. We allocate the hash table here | |
5978 | * since cleanup() can get called after this point. | |
5979 | */ | |
5980 | if (agent_app_ht_alloc()) { | |
5981 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5982 | retval = -1; |
5983 | goto exit_init_data; | |
f20baf8e DG |
5984 | } |
5985 | ||
a88df331 DG |
5986 | /* |
5987 | * These actions must be executed as root. We do that *after* setting up | |
5988 | * the sockets path because we MUST make the check for another daemon using | |
5989 | * those paths *before* trying to set the kernel consumer sockets and init | |
5990 | * kernel tracer. | |
5991 | */ | |
5992 | if (is_root) { | |
e6142f2e | 5993 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
5994 | retval = -1; |
5995 | goto exit_init_data; | |
7753dea8 MD |
5996 | } |
5997 | ||
a88df331 | 5998 | /* Setup kernel tracer */ |
e6142f2e | 5999 | if (!config.no_kernel) { |
4fba7219 | 6000 | init_kernel_tracer(); |
89588270 DG |
6001 | if (kernel_tracer_fd >= 0) { |
6002 | ret = syscall_init_table(); | |
6003 | if (ret < 0) { | |
4a15001e MD |
6004 | ERR("Unable to populate syscall table. " |
6005 | "Syscall tracing won't work " | |
6006 | "for this session daemon."); | |
89588270 | 6007 | } |
834978fd | 6008 | } |
4fba7219 | 6009 | } |
a88df331 DG |
6010 | |
6011 | /* Set ulimit for open files */ | |
6012 | set_ulimit(); | |
fac6795d | 6013 | } |
4063050c MD |
6014 | /* init lttng_fd tracking must be done after set_ulimit. */ |
6015 | lttng_fd_init(); | |
fac6795d | 6016 | |
e6142f2e | 6017 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
6018 | retval = -1; |
6019 | goto exit_init_data; | |
67e40797 DG |
6020 | } |
6021 | ||
e6142f2e | 6022 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
6023 | retval = -1; |
6024 | goto exit_init_data; | |
67e40797 DG |
6025 | } |
6026 | ||
d6f42150 | 6027 | /* Setup the needed unix socket */ |
4a15001e MD |
6028 | if (init_daemon_socket()) { |
6029 | retval = -1; | |
6030 | goto exit_init_data; | |
fac6795d DG |
6031 | } |
6032 | ||
6033 | /* Set credentials to socket */ | |
e6142f2e | 6034 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
6035 | retval = -1; |
6036 | goto exit_init_data; | |
fac6795d DG |
6037 | } |
6038 | ||
5b8719f5 | 6039 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 6040 | if (config.sig_parent) { |
5b8719f5 DG |
6041 | ppid = getppid(); |
6042 | } | |
6043 | ||
7a485870 | 6044 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 6045 | if (is_root && !config.no_kernel) { |
4a15001e MD |
6046 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
6047 | retval = -1; | |
6048 | goto exit_init_data; | |
6620da75 | 6049 | } |
7a485870 DG |
6050 | } |
6051 | ||
099e26bd | 6052 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
6053 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
6054 | retval = -1; | |
6055 | goto exit_init_data; | |
099e26bd DG |
6056 | } |
6057 | ||
d0b96690 | 6058 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
6059 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
6060 | retval = -1; | |
6061 | goto exit_init_data; | |
d0b96690 DG |
6062 | } |
6063 | ||
7972aab2 DG |
6064 | /* Initialize global buffer per UID and PID registry. */ |
6065 | buffer_reg_init_uid_registry(); | |
6066 | buffer_reg_init_pid_registry(); | |
6067 | ||
099e26bd | 6068 | /* Init UST command queue. */ |
8bdee6e2 | 6069 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 6070 | |
273ea72c | 6071 | /* |
4a15001e MD |
6072 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
6073 | * is statically declared in session.c | |
273ea72c | 6074 | */ |
54d01ffb | 6075 | session_list_ptr = session_get_list(); |
b5541356 | 6076 | |
2f77fc4b | 6077 | cmd_init(); |
00e2e675 | 6078 | |
ae9e45b3 DG |
6079 | /* Check for the application socket timeout env variable. */ |
6080 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
6081 | if (env_app_timeout) { | |
e6142f2e | 6082 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 6083 | } else { |
e6142f2e | 6084 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
6085 | } |
6086 | ||
4a15001e MD |
6087 | ret = write_pidfile(); |
6088 | if (ret) { | |
6089 | ERR("Error in write_pidfile"); | |
6090 | retval = -1; | |
6091 | goto exit_init_data; | |
6092 | } | |
6093 | ret = write_agent_port(); | |
6094 | if (ret) { | |
6095 | ERR("Error in write_agent_port"); | |
6096 | retval = -1; | |
6097 | goto exit_init_data; | |
6098 | } | |
35f90c40 | 6099 | |
554831e7 MD |
6100 | /* Initialize communication library */ |
6101 | lttcomm_init(); | |
4a15001e | 6102 | /* Initialize TCP timeout values */ |
d831c249 | 6103 | lttcomm_inet_init(); |
554831e7 | 6104 | |
ef367a93 | 6105 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
6106 | retval = -1; |
6107 | goto exit_init_data; | |
ef367a93 | 6108 | } |
e6142f2e | 6109 | load_info->path = config.load_session_path.value; |
ef367a93 | 6110 | |
12b4fb37 | 6111 | /* Create health-check thread. */ |
1a1a34b4 | 6112 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 6113 | thread_manage_health, (void *) NULL); |
4a15001e MD |
6114 | if (ret) { |
6115 | errno = ret; | |
44a5e5eb | 6116 | PERROR("pthread_create health"); |
4a15001e | 6117 | retval = -1; |
44a5e5eb DG |
6118 | goto exit_health; |
6119 | } | |
6120 | ||
90936dcf JD |
6121 | /* |
6122 | * The rotation thread needs the notification thread to be ready before | |
6123 | * creating the rotate_notification_channel, so we use this semaphore as | |
6124 | * a rendez-vous point. | |
6125 | */ | |
6126 | sem_init(¬ification_thread_ready, 0, 0); | |
6127 | ||
b3530820 JG |
6128 | /* notification_thread_data acquires the pipes' read side. */ |
6129 | notification_thread_handle = notification_thread_handle_create( | |
6130 | ust32_channel_monitor_pipe, | |
6131 | ust64_channel_monitor_pipe, | |
90936dcf JD |
6132 | kernel_channel_monitor_pipe, |
6133 | ¬ification_thread_ready); | |
b3530820 JG |
6134 | if (!notification_thread_handle) { |
6135 | retval = -1; | |
6136 | ERR("Failed to create notification thread shared data"); | |
6137 | stop_threads(); | |
6138 | goto exit_notification; | |
6139 | } | |
6140 | ||
6141 | /* Create notification thread. */ | |
6142 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
6143 | thread_notification, notification_thread_handle); | |
6144 | if (ret) { | |
6145 | errno = ret; | |
6146 | PERROR("pthread_create notification"); | |
6147 | retval = -1; | |
6148 | stop_threads(); | |
6149 | goto exit_notification; | |
6150 | } | |
6be1a386 | 6151 | notification_thread_running = true; |
b3530820 | 6152 | |
d086f507 JD |
6153 | /* Create timer thread. */ |
6154 | ret = pthread_create(&timer_thread, default_pthread_attr(), | |
6155 | sessiond_timer_thread, &timer_thread_ctx); | |
6156 | if (ret) { | |
6157 | errno = ret; | |
6158 | PERROR("pthread_create timer"); | |
6159 | retval = -1; | |
6160 | stop_threads(); | |
6161 | goto exit_notification; | |
6162 | } | |
6163 | timer_thread_running = true; | |
6164 | ||
db66e574 JD |
6165 | /* rotation_thread_data acquires the pipes' read side. */ |
6166 | rotation_thread_handle = rotation_thread_handle_create( | |
6167 | ust32_channel_rotate_pipe, | |
6168 | ust64_channel_rotate_pipe, | |
6169 | kernel_channel_rotate_pipe, | |
d086f507 | 6170 | thread_quit_pipe[0], |
90936dcf JD |
6171 | rotation_timer_queue, |
6172 | notification_thread_handle, | |
6173 | ¬ification_thread_ready); | |
db66e574 JD |
6174 | if (!rotation_thread_handle) { |
6175 | retval = -1; | |
6176 | ERR("Failed to create rotation thread shared data"); | |
6177 | stop_threads(); | |
6178 | goto exit_rotation; | |
6179 | } | |
db66e574 JD |
6180 | |
6181 | /* Create rotation thread. */ | |
6182 | ret = pthread_create(&rotation_thread, default_pthread_attr(), | |
6183 | thread_rotation, rotation_thread_handle); | |
6184 | if (ret) { | |
6185 | errno = ret; | |
6186 | PERROR("pthread_create rotation"); | |
6187 | retval = -1; | |
6188 | stop_threads(); | |
6189 | goto exit_rotation; | |
6190 | } | |
d086f507 | 6191 | rotation_thread_running = true; |
db66e574 | 6192 | |
cf3af59e | 6193 | /* Create thread to manage the client socket */ |
1a1a34b4 | 6194 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 6195 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
6196 | if (ret) { |
6197 | errno = ret; | |
76d7553f | 6198 | PERROR("pthread_create clients"); |
4a15001e | 6199 | retval = -1; |
b3530820 | 6200 | stop_threads(); |
cf3af59e MD |
6201 | goto exit_client; |
6202 | } | |
fac6795d | 6203 | |
099e26bd | 6204 | /* Create thread to dispatch registration */ |
1a1a34b4 | 6205 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 6206 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
6207 | if (ret) { |
6208 | errno = ret; | |
76d7553f | 6209 | PERROR("pthread_create dispatch"); |
4a15001e | 6210 | retval = -1; |
b3530820 | 6211 | stop_threads(); |
099e26bd DG |
6212 | goto exit_dispatch; |
6213 | } | |
6214 | ||
6215 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 6216 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 6217 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
6218 | if (ret) { |
6219 | errno = ret; | |
76d7553f | 6220 | PERROR("pthread_create registration"); |
4a15001e | 6221 | retval = -1; |
b3530820 | 6222 | stop_threads(); |
099e26bd DG |
6223 | goto exit_reg_apps; |
6224 | } | |
6225 | ||
cf3af59e | 6226 | /* Create thread to manage application socket */ |
1a1a34b4 | 6227 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 6228 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
6229 | if (ret) { |
6230 | errno = ret; | |
d0b96690 | 6231 | PERROR("pthread_create apps"); |
4a15001e | 6232 | retval = -1; |
b3530820 | 6233 | stop_threads(); |
d0b96690 DG |
6234 | goto exit_apps; |
6235 | } | |
6236 | ||
6237 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 6238 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 6239 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
6240 | if (ret) { |
6241 | errno = ret; | |
f5c32ef1 | 6242 | PERROR("pthread_create notify"); |
4a15001e | 6243 | retval = -1; |
b3530820 | 6244 | stop_threads(); |
9563b0ad | 6245 | goto exit_apps_notify; |
cf3af59e | 6246 | } |
fac6795d | 6247 | |
022d91ba | 6248 | /* Create agent registration thread. */ |
1a1a34b4 | 6249 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 6250 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
6251 | if (ret) { |
6252 | errno = ret; | |
022d91ba | 6253 | PERROR("pthread_create agent"); |
4a15001e | 6254 | retval = -1; |
b3530820 | 6255 | stop_threads(); |
022d91ba | 6256 | goto exit_agent_reg; |
4d076222 DG |
6257 | } |
6258 | ||
6620da75 | 6259 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 6260 | if (is_root && !config.no_kernel) { |
6620da75 | 6261 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 6262 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 6263 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
6264 | if (ret) { |
6265 | errno = ret; | |
6620da75 | 6266 | PERROR("pthread_create kernel"); |
4a15001e | 6267 | retval = -1; |
b3530820 | 6268 | stop_threads(); |
6620da75 DG |
6269 | goto exit_kernel; |
6270 | } | |
ef367a93 | 6271 | } |
7a485870 | 6272 | |
4a15001e | 6273 | /* Create session loading thread. */ |
1a1a34b4 MJ |
6274 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
6275 | thread_load_session, load_info); | |
4a15001e MD |
6276 | if (ret) { |
6277 | errno = ret; | |
6278 | PERROR("pthread_create load_session_thread"); | |
6279 | retval = -1; | |
b3530820 | 6280 | stop_threads(); |
4a15001e MD |
6281 | goto exit_load_session; |
6282 | } | |
6283 | ||
6284 | /* | |
6285 | * This is where we start awaiting program completion (e.g. through | |
6286 | * signal that asks threads to teardown). | |
6287 | */ | |
6288 | ||
6289 | ret = pthread_join(load_session_thread, &status); | |
6290 | if (ret) { | |
6291 | errno = ret; | |
6292 | PERROR("pthread_join load_session_thread"); | |
6293 | retval = -1; | |
6294 | } | |
6295 | exit_load_session: | |
ef367a93 | 6296 | |
e6142f2e | 6297 | if (is_root && !config.no_kernel) { |
6620da75 | 6298 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
6299 | if (ret) { |
6300 | errno = ret; | |
6620da75 | 6301 | PERROR("pthread_join"); |
4a15001e | 6302 | retval = -1; |
6620da75 | 6303 | } |
fac6795d | 6304 | } |
cf3af59e | 6305 | exit_kernel: |
4a15001e | 6306 | |
022d91ba | 6307 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
6308 | if (ret) { |
6309 | errno = ret; | |
022d91ba | 6310 | PERROR("pthread_join agent"); |
4a15001e | 6311 | retval = -1; |
4d076222 | 6312 | } |
022d91ba | 6313 | exit_agent_reg: |
4a15001e | 6314 | |
9563b0ad | 6315 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
6316 | if (ret) { |
6317 | errno = ret; | |
9563b0ad | 6318 | PERROR("pthread_join apps notify"); |
4a15001e | 6319 | retval = -1; |
9563b0ad | 6320 | } |
9563b0ad | 6321 | exit_apps_notify: |
4a15001e | 6322 | |
cf3af59e | 6323 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
6324 | if (ret) { |
6325 | errno = ret; | |
9563b0ad | 6326 | PERROR("pthread_join apps"); |
4a15001e | 6327 | retval = -1; |
cf3af59e | 6328 | } |
cf3af59e | 6329 | exit_apps: |
4a15001e | 6330 | |
099e26bd | 6331 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
6332 | if (ret) { |
6333 | errno = ret; | |
76d7553f | 6334 | PERROR("pthread_join"); |
4a15001e | 6335 | retval = -1; |
099e26bd | 6336 | } |
099e26bd | 6337 | exit_reg_apps: |
4a15001e | 6338 | |
772b8f4d MD |
6339 | /* |
6340 | * Join dispatch thread after joining reg_apps_thread to ensure | |
6341 | * we don't leak applications in the queue. | |
6342 | */ | |
099e26bd | 6343 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
6344 | if (ret) { |
6345 | errno = ret; | |
76d7553f | 6346 | PERROR("pthread_join"); |
4a15001e | 6347 | retval = -1; |
099e26bd | 6348 | } |
099e26bd | 6349 | exit_dispatch: |
4a15001e | 6350 | |
cf3af59e | 6351 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
6352 | if (ret) { |
6353 | errno = ret; | |
76d7553f | 6354 | PERROR("pthread_join"); |
4a15001e | 6355 | retval = -1; |
cf3af59e | 6356 | } |
a88df331 | 6357 | |
b3530820 | 6358 | exit_client: |
db66e574 | 6359 | exit_rotation: |
b3530820 | 6360 | exit_notification: |
90936dcf | 6361 | sem_destroy(¬ification_thread_ready); |
4a15001e MD |
6362 | ret = pthread_join(health_thread, &status); |
6363 | if (ret) { | |
6364 | errno = ret; | |
6365 | PERROR("pthread_join health thread"); | |
6366 | retval = -1; | |
06f525de DG |
6367 | } |
6368 | ||
b3530820 | 6369 | exit_health: |
4a15001e | 6370 | exit_init_data: |
4d62fbf8 MD |
6371 | /* |
6372 | * Wait for all pending call_rcu work to complete before tearing | |
6373 | * down data structures. call_rcu worker may be trying to | |
6374 | * perform lookups in those structures. | |
6375 | */ | |
6376 | rcu_barrier(); | |
4a15001e MD |
6377 | /* |
6378 | * sessiond_cleanup() is called when no other thread is running, except | |
6379 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6380 | */ | |
6381 | rcu_thread_online(); | |
6382 | sessiond_cleanup(); | |
06f525de | 6383 | |
c4d5de9d JG |
6384 | /* |
6385 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6386 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6387 | * the queue is empty before shutting down the clean-up thread. | |
6388 | */ | |
6389 | rcu_barrier(); | |
6390 | ||
b3530820 JG |
6391 | /* |
6392 | * The teardown of the notification system is performed after the | |
6393 | * session daemon's teardown in order to allow it to be notified | |
6394 | * of the active session and channels at the moment of the teardown. | |
6395 | */ | |
6396 | if (notification_thread_handle) { | |
6be1a386 JG |
6397 | if (notification_thread_running) { |
6398 | notification_thread_command_quit( | |
6399 | notification_thread_handle); | |
6400 | ret = pthread_join(notification_thread, &status); | |
6401 | if (ret) { | |
6402 | errno = ret; | |
6403 | PERROR("pthread_join notification thread"); | |
6404 | retval = -1; | |
6405 | } | |
3dec304b | 6406 | } |
6be1a386 | 6407 | notification_thread_handle_destroy(notification_thread_handle); |
b3530820 JG |
6408 | } |
6409 | ||
db66e574 JD |
6410 | if (rotation_thread_handle) { |
6411 | if (rotation_thread_running) { | |
6412 | ret = pthread_join(rotation_thread, &status); | |
6413 | if (ret) { | |
6414 | errno = ret; | |
6415 | PERROR("pthread_join rotation thread"); | |
6416 | retval = -1; | |
6417 | } | |
6418 | } | |
6419 | rotation_thread_handle_destroy(rotation_thread_handle); | |
6420 | } | |
6421 | ||
d086f507 JD |
6422 | if (timer_thread_running) { |
6423 | kill(getpid(), LTTNG_SESSIOND_SIG_EXIT); | |
6424 | ret = pthread_join(timer_thread, &status); | |
6425 | if (ret) { | |
6426 | errno = ret; | |
6427 | PERROR("pthread_join timer thread"); | |
6428 | retval = -1; | |
6429 | } | |
6430 | } | |
6431 | ||
6432 | /* | |
6433 | * After the rotation and timer thread have quit, we can safely destroy | |
6434 | * the rotation_timer_queue. | |
6435 | */ | |
6436 | destroy_rotate_timer_queue(rotation_timer_queue); | |
6437 | ||
b3530820 JG |
6438 | rcu_thread_offline(); |
6439 | rcu_unregister_thread(); | |
6440 | ||
5e97de00 | 6441 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6442 | if (ret) { |
4a15001e | 6443 | retval = -1; |
0b2dc8df | 6444 | } |
b3530820 JG |
6445 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
6446 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
6447 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
62c43103 JD |
6448 | lttng_pipe_destroy(ust32_channel_rotate_pipe); |
6449 | lttng_pipe_destroy(ust64_channel_rotate_pipe); | |
6450 | lttng_pipe_destroy(kernel_channel_rotate_pipe); | |
0b2dc8df | 6451 | exit_ht_cleanup: |
4a15001e | 6452 | |
4a15001e MD |
6453 | health_app_destroy(health_sessiond); |
6454 | exit_health_sessiond_cleanup: | |
7567352f | 6455 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6456 | |
6457 | exit_options: | |
6458 | sessiond_cleanup_options(); | |
6459 | ||
6460 | exit_set_signal_handler: | |
6461 | if (!retval) { | |
cf3af59e | 6462 | exit(EXIT_SUCCESS); |
4a15001e MD |
6463 | } else { |
6464 | exit(EXIT_FAILURE); | |
67e40797 | 6465 | } |
fac6795d | 6466 | } |