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" | |
834978fd | 76 | #include "syscall.h" |
7c1d2758 | 77 | #include "agent.h" |
5e97de00 | 78 | #include "ht-cleanup.h" |
e6142f2e | 79 | #include "sessiond-config.h" |
ebaeda94 | 80 | |
4fc83d94 PP |
81 | static const char *help_msg = |
82 | #ifdef LTTNG_EMBED_HELP | |
83 | #include <lttng-sessiond.8.h> | |
84 | #else | |
85 | NULL | |
86 | #endif | |
87 | ; | |
88 | ||
fac6795d | 89 | const char *progname; |
1d4b027a | 90 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
0bb7724a | 91 | static pid_t child_ppid; /* Internal parent PID use with daemonize. */ |
c9cb3e7d | 92 | static int lockfile_fd = -1; |
3bd1e081 | 93 | |
0bb7724a DG |
94 | /* Set to 1 when a SIGUSR1 signal is received. */ |
95 | static int recv_child_signal; | |
96 | ||
88076e89 JD |
97 | static struct lttng_kernel_tracer_version kernel_tracer_version; |
98 | static struct lttng_kernel_tracer_abi_version kernel_tracer_abi_version; | |
99 | ||
a23ec3a7 DG |
100 | /* |
101 | * Consumer daemon specific control data. Every value not initialized here is | |
102 | * set to 0 by the static definition. | |
103 | */ | |
3bd1e081 MD |
104 | static struct consumer_data kconsumer_data = { |
105 | .type = LTTNG_CONSUMER_KERNEL, | |
03550b58 MD |
106 | .err_sock = -1, |
107 | .cmd_sock = -1, | |
b3530820 | 108 | .channel_monitor_pipe = -1, |
173af62f DG |
109 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
110 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
111 | .cond = PTHREAD_COND_INITIALIZER, |
112 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 113 | }; |
7753dea8 MD |
114 | static struct consumer_data ustconsumer64_data = { |
115 | .type = LTTNG_CONSUMER64_UST, | |
03550b58 MD |
116 | .err_sock = -1, |
117 | .cmd_sock = -1, | |
b3530820 | 118 | .channel_monitor_pipe = -1, |
173af62f DG |
119 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
120 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
121 | .cond = PTHREAD_COND_INITIALIZER, |
122 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
123 | }; |
124 | static struct consumer_data ustconsumer32_data = { | |
125 | .type = LTTNG_CONSUMER32_UST, | |
03550b58 MD |
126 | .err_sock = -1, |
127 | .cmd_sock = -1, | |
b3530820 | 128 | .channel_monitor_pipe = -1, |
173af62f DG |
129 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
130 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
131 | .cond = PTHREAD_COND_INITIALIZER, |
132 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
133 | }; |
134 | ||
26296c48 JG |
135 | /* Command line options */ |
136 | static const struct option long_options[] = { | |
0f5ea17c JG |
137 | { "client-sock", required_argument, 0, 'c' }, |
138 | { "apps-sock", required_argument, 0, 'a' }, | |
139 | { "kconsumerd-cmd-sock", required_argument, 0, '\0' }, | |
140 | { "kconsumerd-err-sock", required_argument, 0, '\0' }, | |
141 | { "ustconsumerd32-cmd-sock", required_argument, 0, '\0' }, | |
142 | { "ustconsumerd32-err-sock", required_argument, 0, '\0' }, | |
143 | { "ustconsumerd64-cmd-sock", required_argument, 0, '\0' }, | |
144 | { "ustconsumerd64-err-sock", required_argument, 0, '\0' }, | |
145 | { "consumerd32-path", required_argument, 0, '\0' }, | |
146 | { "consumerd32-libdir", required_argument, 0, '\0' }, | |
147 | { "consumerd64-path", required_argument, 0, '\0' }, | |
148 | { "consumerd64-libdir", required_argument, 0, '\0' }, | |
149 | { "daemonize", no_argument, 0, 'd' }, | |
150 | { "background", no_argument, 0, 'b' }, | |
151 | { "sig-parent", no_argument, 0, 'S' }, | |
152 | { "help", no_argument, 0, 'h' }, | |
153 | { "group", required_argument, 0, 'g' }, | |
154 | { "version", no_argument, 0, 'V' }, | |
155 | { "quiet", no_argument, 0, 'q' }, | |
156 | { "verbose", no_argument, 0, 'v' }, | |
157 | { "verbose-consumer", no_argument, 0, '\0' }, | |
158 | { "no-kernel", no_argument, 0, '\0' }, | |
159 | { "pidfile", required_argument, 0, 'p' }, | |
160 | { "agent-tcp-port", required_argument, 0, '\0' }, | |
161 | { "config", required_argument, 0, 'f' }, | |
162 | { "load", required_argument, 0, 'l' }, | |
163 | { "kmod-probes", required_argument, 0, '\0' }, | |
164 | { "extra-kmod-probes", required_argument, 0, '\0' }, | |
26296c48 JG |
165 | { NULL, 0, 0, 0 } |
166 | }; | |
167 | ||
e6142f2e JG |
168 | struct sessiond_config config; |
169 | ||
26296c48 JG |
170 | /* Command line options to ignore from configuration file */ |
171 | static const char *config_ignore_options[] = { "help", "version", "config" }; | |
172 | ||
26c9d55e | 173 | /* Shared between threads */ |
099e26bd | 174 | static int dispatch_thread_exit; |
fac6795d | 175 | |
1d4b027a | 176 | /* Sockets and FDs */ |
a4b35e07 MD |
177 | static int client_sock = -1; |
178 | static int apps_sock = -1; | |
2f77fc4b | 179 | int kernel_tracer_fd = -1; |
76d7553f | 180 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 181 | |
273ea72c DG |
182 | /* |
183 | * Quit pipe for all threads. This permits a single cancellation point | |
184 | * for all threads when receiving an event on the pipe. | |
185 | */ | |
76d7553f | 186 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 187 | |
099e26bd DG |
188 | /* |
189 | * This pipe is used to inform the thread managing application communication | |
190 | * that a command is queued and ready to be processed. | |
191 | */ | |
76d7553f | 192 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 193 | |
d0b96690 DG |
194 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
195 | ||
1d4b027a | 196 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 197 | static pthread_t apps_thread; |
d0b96690 | 198 | static pthread_t apps_notify_thread; |
099e26bd | 199 | static pthread_t reg_apps_thread; |
1d4b027a | 200 | static pthread_t client_thread; |
7a485870 | 201 | static pthread_t kernel_thread; |
099e26bd | 202 | static pthread_t dispatch_thread; |
44a5e5eb | 203 | static pthread_t health_thread; |
0b2dc8df | 204 | static pthread_t ht_cleanup_thread; |
022d91ba | 205 | static pthread_t agent_reg_thread; |
ef367a93 | 206 | static pthread_t load_session_thread; |
b3530820 | 207 | static pthread_t notification_thread; |
5eb91c98 | 208 | |
099e26bd DG |
209 | /* |
210 | * UST registration command queue. This queue is tied with a futex and uses a N | |
211 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
212 | * | |
b22c5da8 DG |
213 | * The thread_registration_apps and thread_dispatch_ust_registration uses this |
214 | * queue along with the wait/wake scheme. The thread_manage_apps receives down | |
215 | * the line new application socket and monitors it for any I/O error or clean | |
216 | * close that triggers an unregistration of the application. | |
099e26bd DG |
217 | */ |
218 | static struct ust_cmd_queue ust_cmd_queue; | |
219 | ||
b5541356 DG |
220 | /* |
221 | * Pointer initialized before thread creation. | |
222 | * | |
223 | * This points to the tracing session list containing the session count and a | |
224 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
225 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 226 | * |
d063d709 | 227 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 228 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
229 | */ |
230 | static struct ltt_session_list *session_list_ptr; | |
231 | ||
7753dea8 MD |
232 | int ust_consumerd64_fd = -1; |
233 | int ust_consumerd32_fd = -1; | |
234 | ||
2f77fc4b DG |
235 | static const char *module_proc_lttng = "/proc/lttng"; |
236 | ||
5c827ce0 DG |
237 | /* |
238 | * Consumer daemon state which is changed when spawning it, killing it or in | |
239 | * case of a fatal error. | |
240 | */ | |
241 | enum consumerd_state { | |
242 | CONSUMER_STARTED = 1, | |
243 | CONSUMER_STOPPED = 2, | |
244 | CONSUMER_ERROR = 3, | |
245 | }; | |
246 | ||
247 | /* | |
248 | * This consumer daemon state is used to validate if a client command will be | |
249 | * able to reach the consumer. If not, the client is informed. For instance, | |
250 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
251 | * error to the client. | |
252 | * | |
253 | * The following example shows a possible race condition of this scheme: | |
254 | * | |
255 | * consumer thread error happens | |
256 | * client cmd arrives | |
257 | * client cmd checks state -> still OK | |
258 | * consumer thread exit, sets error | |
259 | * client cmd try to talk to consumer | |
260 | * ... | |
261 | * | |
262 | * However, since the consumer is a different daemon, we have no way of making | |
263 | * sure the command will reach it safely even with this state flag. This is why | |
264 | * we consider that up to the state validation during command processing, the | |
265 | * command is safe. After that, we can not guarantee the correctness of the | |
266 | * client request vis-a-vis the consumer. | |
267 | */ | |
268 | static enum consumerd_state ust_consumerd_state; | |
269 | static enum consumerd_state kernel_consumerd_state; | |
270 | ||
12744796 DG |
271 | /* Set in main() with the current page size. */ |
272 | long page_size; | |
273 | ||
8782cc74 MD |
274 | /* Application health monitoring */ |
275 | struct health_app *health_sessiond; | |
276 | ||
f43f95a9 DG |
277 | /* Am I root or not. */ |
278 | int is_root; /* Set to 1 if the daemon is running as root */ | |
279 | ||
26296c48 JG |
280 | const char * const config_section_name = "sessiond"; |
281 | ||
ef367a93 JG |
282 | /* Load session thread information to operate. */ |
283 | struct load_session_thread_data *load_info; | |
284 | ||
b3530820 JG |
285 | /* Notification thread handle. */ |
286 | struct notification_thread_handle *notification_thread_handle; | |
287 | ||
7c1d2758 JG |
288 | /* Global hash tables */ |
289 | struct lttng_ht *agent_apps_ht_by_sock = NULL; | |
290 | ||
97bc1426 | 291 | /* |
b3530820 JG |
292 | * Whether sessiond is ready for commands/notification channel/health check |
293 | * requests. | |
97bc1426 | 294 | * NR_LTTNG_SESSIOND_READY must match the number of calls to |
ef367a93 | 295 | * sessiond_notify_ready(). |
97bc1426 | 296 | */ |
b3530820 | 297 | #define NR_LTTNG_SESSIOND_READY 4 |
97bc1426 MD |
298 | int lttng_sessiond_ready = NR_LTTNG_SESSIOND_READY; |
299 | ||
5e97de00 JG |
300 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
301 | { | |
302 | return (fd == thread_quit_pipe[0] && (events & LPOLLIN)) ? 1 : 0; | |
303 | } | |
304 | ||
97bc1426 | 305 | /* Notify parents that we are ready for cmd and health check */ |
ef367a93 JG |
306 | LTTNG_HIDDEN |
307 | void sessiond_notify_ready(void) | |
97bc1426 MD |
308 | { |
309 | if (uatomic_sub_return(<tng_sessiond_ready, 1) == 0) { | |
310 | /* | |
311 | * Notify parent pid that we are ready to accept command | |
312 | * for client side. This ppid is the one from the | |
313 | * external process that spawned us. | |
314 | */ | |
e6142f2e | 315 | if (config.sig_parent) { |
97bc1426 MD |
316 | kill(ppid, SIGUSR1); |
317 | } | |
318 | ||
319 | /* | |
320 | * Notify the parent of the fork() process that we are | |
321 | * ready. | |
322 | */ | |
e6142f2e | 323 | if (config.daemonize || config.background) { |
97bc1426 MD |
324 | kill(child_ppid, SIGUSR1); |
325 | } | |
326 | } | |
327 | } | |
328 | ||
4a15001e MD |
329 | static |
330 | int __sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size, | |
331 | int *a_pipe) | |
5eb91c98 DG |
332 | { |
333 | int ret; | |
334 | ||
d0b96690 | 335 | assert(events); |
5eb91c98 DG |
336 | |
337 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
338 | if (ret < 0) { | |
339 | goto error; | |
340 | } | |
341 | ||
342 | /* Add quit pipe */ | |
4a15001e | 343 | ret = lttng_poll_add(events, a_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
344 | if (ret < 0) { |
345 | goto error; | |
346 | } | |
347 | ||
348 | return 0; | |
349 | ||
350 | error: | |
351 | return ret; | |
352 | } | |
353 | ||
4a15001e MD |
354 | /* |
355 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
356 | */ | |
357 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) | |
358 | { | |
359 | return __sessiond_set_thread_pollset(events, size, thread_quit_pipe); | |
360 | } | |
361 | ||
273ea72c | 362 | /* |
5eb91c98 | 363 | * Init thread quit pipe. |
273ea72c DG |
364 | * |
365 | * Return -1 on error or 0 if all pipes are created. | |
366 | */ | |
4a15001e | 367 | static int __init_thread_quit_pipe(int *a_pipe) |
273ea72c | 368 | { |
730389d9 | 369 | int ret, i; |
273ea72c | 370 | |
4a15001e | 371 | ret = pipe(a_pipe); |
273ea72c | 372 | if (ret < 0) { |
730389d9 | 373 | PERROR("thread quit pipe"); |
273ea72c DG |
374 | goto error; |
375 | } | |
376 | ||
730389d9 | 377 | for (i = 0; i < 2; i++) { |
4a15001e | 378 | ret = fcntl(a_pipe[i], F_SETFD, FD_CLOEXEC); |
730389d9 DG |
379 | if (ret < 0) { |
380 | PERROR("fcntl"); | |
381 | goto error; | |
382 | } | |
383 | } | |
384 | ||
273ea72c DG |
385 | error: |
386 | return ret; | |
387 | } | |
388 | ||
4a15001e MD |
389 | static int init_thread_quit_pipe(void) |
390 | { | |
391 | return __init_thread_quit_pipe(thread_quit_pipe); | |
392 | } | |
393 | ||
099e26bd DG |
394 | /* |
395 | * Stop all threads by closing the thread quit pipe. | |
396 | */ | |
cf3af59e MD |
397 | static void stop_threads(void) |
398 | { | |
5eb91c98 DG |
399 | int ret; |
400 | ||
cf3af59e MD |
401 | /* Stopping all threads */ |
402 | DBG("Terminating all threads"); | |
54d01ffb | 403 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
404 | if (ret < 0) { |
405 | ERR("write error on thread quit pipe"); | |
406 | } | |
407 | ||
099e26bd | 408 | /* Dispatch thread */ |
26c9d55e | 409 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 410 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
411 | } |
412 | ||
e975f9f8 DG |
413 | /* |
414 | * Close every consumer sockets. | |
415 | */ | |
416 | static void close_consumer_sockets(void) | |
417 | { | |
418 | int ret; | |
419 | ||
420 | if (kconsumer_data.err_sock >= 0) { | |
421 | ret = close(kconsumer_data.err_sock); | |
422 | if (ret < 0) { | |
423 | PERROR("kernel consumer err_sock close"); | |
424 | } | |
425 | } | |
426 | if (ustconsumer32_data.err_sock >= 0) { | |
427 | ret = close(ustconsumer32_data.err_sock); | |
428 | if (ret < 0) { | |
a76cbd9f | 429 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
430 | } |
431 | } | |
432 | if (ustconsumer64_data.err_sock >= 0) { | |
433 | ret = close(ustconsumer64_data.err_sock); | |
434 | if (ret < 0) { | |
a76cbd9f | 435 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
436 | } |
437 | } | |
438 | if (kconsumer_data.cmd_sock >= 0) { | |
439 | ret = close(kconsumer_data.cmd_sock); | |
440 | if (ret < 0) { | |
441 | PERROR("kernel consumer cmd_sock close"); | |
442 | } | |
443 | } | |
444 | if (ustconsumer32_data.cmd_sock >= 0) { | |
445 | ret = close(ustconsumer32_data.cmd_sock); | |
446 | if (ret < 0) { | |
a76cbd9f | 447 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
448 | } |
449 | } | |
450 | if (ustconsumer64_data.cmd_sock >= 0) { | |
451 | ret = close(ustconsumer64_data.cmd_sock); | |
452 | if (ret < 0) { | |
a76cbd9f | 453 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
454 | } |
455 | } | |
b3530820 JG |
456 | if (kconsumer_data.channel_monitor_pipe >= 0) { |
457 | ret = close(kconsumer_data.channel_monitor_pipe); | |
458 | if (ret < 0) { | |
459 | PERROR("kernel consumer channel monitor pipe close"); | |
460 | } | |
461 | } | |
462 | if (ustconsumer32_data.channel_monitor_pipe >= 0) { | |
463 | ret = close(ustconsumer32_data.channel_monitor_pipe); | |
464 | if (ret < 0) { | |
465 | PERROR("UST consumerd32 channel monitor pipe close"); | |
466 | } | |
467 | } | |
468 | if (ustconsumer64_data.channel_monitor_pipe >= 0) { | |
469 | ret = close(ustconsumer64_data.channel_monitor_pipe); | |
470 | if (ret < 0) { | |
471 | PERROR("UST consumerd64 channel monitor pipe close"); | |
472 | } | |
473 | } | |
e975f9f8 DG |
474 | } |
475 | ||
4e4714cb JR |
476 | /* |
477 | * Wait on consumer process termination. | |
478 | * | |
479 | * Need to be called with the consumer data lock held or from a context | |
480 | * ensuring no concurrent access to data (e.g: cleanup). | |
481 | */ | |
482 | static void wait_consumer(struct consumer_data *consumer_data) | |
483 | { | |
484 | pid_t ret; | |
485 | int status; | |
486 | ||
487 | if (consumer_data->pid <= 0) { | |
488 | return; | |
489 | } | |
490 | ||
491 | DBG("Waiting for complete teardown of consumerd (PID: %d)", | |
492 | consumer_data->pid); | |
493 | ret = waitpid(consumer_data->pid, &status, 0); | |
494 | if (ret == -1) { | |
495 | PERROR("consumerd waitpid pid: %d", consumer_data->pid) | |
1640c24c | 496 | } else if (!WIFEXITED(status)) { |
4e4714cb JR |
497 | ERR("consumerd termination with error: %d", |
498 | WEXITSTATUS(ret)); | |
499 | } | |
500 | consumer_data->pid = 0; | |
501 | } | |
502 | ||
fac6795d | 503 | /* |
4a15001e | 504 | * Cleanup the session daemon's data structures. |
fac6795d | 505 | */ |
4a15001e | 506 | static void sessiond_cleanup(void) |
fac6795d | 507 | { |
ef599319 | 508 | int ret; |
af9737e9 | 509 | struct ltt_session *sess, *stmp; |
fac6795d | 510 | |
4a15001e | 511 | DBG("Cleanup sessiond"); |
e07ae692 | 512 | |
4e449f3f MD |
513 | /* |
514 | * Close the thread quit pipe. It has already done its job, | |
515 | * since we are now called. | |
516 | */ | |
2f77fc4b DG |
517 | utils_close_pipe(thread_quit_pipe); |
518 | ||
35f90c40 | 519 | /* |
e6142f2e JG |
520 | * If config.pid_file_path.value is undefined, the default file will be |
521 | * wiped when removing the rundir. | |
35f90c40 | 522 | */ |
e6142f2e JG |
523 | if (config.pid_file_path.value) { |
524 | ret = remove(config.pid_file_path.value); | |
35f90c40 | 525 | if (ret < 0) { |
e6142f2e | 526 | PERROR("remove pidfile %s", config.pid_file_path.value); |
35f90c40 DG |
527 | } |
528 | } | |
529 | ||
e6142f2e JG |
530 | DBG("Removing sessiond and consumerd content of directory %s", |
531 | config.rundir.value); | |
8c6c56c2 MD |
532 | |
533 | /* sessiond */ | |
e6142f2e JG |
534 | DBG("Removing %s", config.pid_file_path.value); |
535 | (void) unlink(config.pid_file_path.value); | |
8c6c56c2 | 536 | |
e6142f2e JG |
537 | DBG("Removing %s", config.agent_port_file_path.value); |
538 | (void) unlink(config.agent_port_file_path.value); | |
cd9290dd | 539 | |
8c6c56c2 | 540 | /* kconsumerd */ |
e6142f2e JG |
541 | DBG("Removing %s", kconsumer_data.err_unix_sock_path); |
542 | (void) unlink(kconsumer_data.err_unix_sock_path); | |
543 | ||
544 | DBG("Removing directory %s", config.kconsumerd_path.value); | |
545 | (void) rmdir(config.kconsumerd_path.value); | |
8c6c56c2 MD |
546 | |
547 | /* ust consumerd 32 */ | |
e6142f2e JG |
548 | DBG("Removing %s", config.consumerd32_err_unix_sock_path.value); |
549 | (void) unlink(config.consumerd32_err_unix_sock_path.value); | |
550 | ||
551 | DBG("Removing directory %s", config.consumerd32_path.value); | |
552 | (void) rmdir(config.consumerd32_path.value); | |
8c6c56c2 MD |
553 | |
554 | /* ust consumerd 64 */ | |
e6142f2e JG |
555 | DBG("Removing %s", config.consumerd64_err_unix_sock_path.value); |
556 | (void) unlink(config.consumerd64_err_unix_sock_path.value); | |
557 | ||
558 | DBG("Removing directory %s", config.consumerd64_path.value); | |
559 | (void) rmdir(config.consumerd64_path.value); | |
5461b305 | 560 | |
99bab54f | 561 | DBG("Cleaning up all sessions"); |
fac6795d | 562 | |
b5541356 | 563 | /* Destroy session list mutex */ |
273ea72c DG |
564 | if (session_list_ptr != NULL) { |
565 | pthread_mutex_destroy(&session_list_ptr->lock); | |
566 | ||
567 | /* Cleanup ALL session */ | |
54d01ffb DG |
568 | cds_list_for_each_entry_safe(sess, stmp, |
569 | &session_list_ptr->head, list) { | |
2f77fc4b | 570 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
571 | } |
572 | } | |
573 | ||
4e4714cb JR |
574 | wait_consumer(&kconsumer_data); |
575 | wait_consumer(&ustconsumer64_data); | |
576 | wait_consumer(&ustconsumer32_data); | |
577 | ||
6a4e4039 JG |
578 | DBG("Cleaning up all agent apps"); |
579 | agent_app_ht_clean(); | |
580 | ||
099e26bd | 581 | DBG("Closing all UST sockets"); |
56fff090 | 582 | ust_app_clean_list(); |
7972aab2 | 583 | buffer_reg_destroy_registries(); |
099e26bd | 584 | |
e6142f2e | 585 | if (is_root && !config.no_kernel) { |
4fba7219 | 586 | DBG2("Closing kernel fd"); |
a4b35e07 | 587 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
588 | ret = close(kernel_tracer_fd); |
589 | if (ret) { | |
590 | PERROR("close"); | |
591 | } | |
a4b35e07 | 592 | } |
2f50c8a3 | 593 | DBG("Unloading kernel modules"); |
096102bd | 594 | modprobe_remove_lttng_all(); |
834978fd | 595 | free(syscall_table); |
2f50c8a3 | 596 | } |
2f77fc4b | 597 | |
e975f9f8 DG |
598 | close_consumer_sockets(); |
599 | ||
ef367a93 JG |
600 | if (load_info) { |
601 | load_session_destroy_data(load_info); | |
602 | free(load_info); | |
603 | } | |
604 | ||
c9cb3e7d JG |
605 | /* |
606 | * Cleanup lock file by deleting it and finaly closing it which will | |
607 | * release the file system lock. | |
608 | */ | |
609 | if (lockfile_fd >= 0) { | |
e6142f2e JG |
610 | ret = remove(config.lock_file_path.value); |
611 | if (ret < 0) { | |
612 | PERROR("remove lock file"); | |
613 | } | |
614 | ret = close(lockfile_fd); | |
615 | if (ret < 0) { | |
616 | PERROR("close lock file"); | |
c9cb3e7d JG |
617 | } |
618 | } | |
619 | ||
620 | /* | |
621 | * We do NOT rmdir rundir because there are other processes | |
622 | * using it, for instance lttng-relayd, which can start in | |
623 | * parallel with this teardown. | |
624 | */ | |
4a15001e MD |
625 | } |
626 | ||
627 | /* | |
628 | * Cleanup the daemon's option data structures. | |
629 | */ | |
630 | static void sessiond_cleanup_options(void) | |
631 | { | |
632 | DBG("Cleaning up options"); | |
633 | ||
e6142f2e | 634 | sessiond_config_fini(&config); |
c9cb3e7d | 635 | |
7567352f | 636 | run_as_destroy_worker(); |
fac6795d DG |
637 | } |
638 | ||
e065084a | 639 | /* |
d063d709 | 640 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 641 | * |
d063d709 | 642 | * Return lttcomm error code. |
e065084a DG |
643 | */ |
644 | static int send_unix_sock(int sock, void *buf, size_t len) | |
645 | { | |
646 | /* Check valid length */ | |
c617c0c6 | 647 | if (len == 0) { |
e065084a DG |
648 | return -1; |
649 | } | |
650 | ||
651 | return lttcomm_send_unix_sock(sock, buf, len); | |
652 | } | |
653 | ||
5461b305 | 654 | /* |
d063d709 | 655 | * Free memory of a command context structure. |
5461b305 | 656 | */ |
a2fb29a5 | 657 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 658 | { |
a2fb29a5 DG |
659 | DBG("Clean command context structure"); |
660 | if (*cmd_ctx) { | |
661 | if ((*cmd_ctx)->llm) { | |
662 | free((*cmd_ctx)->llm); | |
5461b305 | 663 | } |
a2fb29a5 DG |
664 | if ((*cmd_ctx)->lsm) { |
665 | free((*cmd_ctx)->lsm); | |
5461b305 | 666 | } |
a2fb29a5 DG |
667 | free(*cmd_ctx); |
668 | *cmd_ctx = NULL; | |
5461b305 DG |
669 | } |
670 | } | |
671 | ||
fac6795d | 672 | /* |
0fdd1e2c | 673 | * Notify UST applications using the shm mmap futex. |
fac6795d | 674 | */ |
0fdd1e2c | 675 | static int notify_ust_apps(int active) |
fac6795d | 676 | { |
0fdd1e2c | 677 | char *wait_shm_mmap; |
fac6795d | 678 | |
0fdd1e2c | 679 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 680 | |
0fdd1e2c | 681 | /* See shm.c for this call implying mmap, shm and futex calls */ |
e6142f2e | 682 | wait_shm_mmap = shm_ust_get_mmap(config.wait_shm_path.value, is_root); |
0fdd1e2c | 683 | if (wait_shm_mmap == NULL) { |
fac6795d DG |
684 | goto error; |
685 | } | |
686 | ||
0fdd1e2c DG |
687 | /* Wake waiting process */ |
688 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
689 | ||
690 | /* Apps notified successfully */ | |
691 | return 0; | |
fac6795d DG |
692 | |
693 | error: | |
0fdd1e2c | 694 | return -1; |
fac6795d DG |
695 | } |
696 | ||
e065084a | 697 | /* |
d063d709 DG |
698 | * Setup the outgoing data buffer for the response (llm) by allocating the |
699 | * right amount of memory and copying the original information from the lsm | |
700 | * structure. | |
ca95a216 | 701 | * |
6e10c9b9 | 702 | * Return 0 on success, negative value on error. |
ca95a216 | 703 | */ |
6e10c9b9 PP |
704 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, |
705 | const void *payload_buf, size_t payload_len, | |
706 | const void *cmd_header_buf, size_t cmd_header_len) | |
ca95a216 | 707 | { |
6e10c9b9 PP |
708 | int ret = 0; |
709 | const size_t header_len = sizeof(struct lttcomm_lttng_msg); | |
710 | const size_t cmd_header_offset = header_len; | |
711 | const size_t payload_offset = cmd_header_offset + cmd_header_len; | |
712 | const size_t total_msg_size = header_len + cmd_header_len + payload_len; | |
ca95a216 | 713 | |
6e10c9b9 | 714 | cmd_ctx->llm = zmalloc(total_msg_size); |
5461b305 | 715 | |
5461b305 | 716 | if (cmd_ctx->llm == NULL) { |
76d7553f | 717 | PERROR("zmalloc"); |
5461b305 | 718 | ret = -ENOMEM; |
6e10c9b9 | 719 | goto end; |
ca95a216 DG |
720 | } |
721 | ||
5461b305 DG |
722 | /* Copy common data */ |
723 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 724 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
6e10c9b9 PP |
725 | cmd_ctx->llm->cmd_header_size = cmd_header_len; |
726 | cmd_ctx->llm->data_size = payload_len; | |
727 | cmd_ctx->lttng_msg_size = total_msg_size; | |
5461b305 | 728 | |
6e10c9b9 | 729 | /* Copy command header */ |
b4e3ceb9 PP |
730 | if (cmd_header_len) { |
731 | memcpy(((uint8_t *) cmd_ctx->llm) + cmd_header_offset, cmd_header_buf, | |
732 | cmd_header_len); | |
733 | } | |
5461b305 | 734 | |
6e10c9b9 | 735 | /* Copy payload */ |
b4e3ceb9 PP |
736 | if (payload_len) { |
737 | memcpy(((uint8_t *) cmd_ctx->llm) + payload_offset, payload_buf, | |
738 | payload_len); | |
739 | } | |
ca95a216 | 740 | |
6e10c9b9 | 741 | end: |
ca95a216 DG |
742 | return ret; |
743 | } | |
744 | ||
6e10c9b9 PP |
745 | /* |
746 | * Version of setup_lttng_msg() without command header. | |
747 | */ | |
748 | static int setup_lttng_msg_no_cmd_header(struct command_ctx *cmd_ctx, | |
749 | void *payload_buf, size_t payload_len) | |
750 | { | |
751 | return setup_lttng_msg(cmd_ctx, payload_buf, payload_len, NULL, 0); | |
752 | } | |
7a485870 | 753 | /* |
5eb91c98 | 754 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 755 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 756 | */ |
5eb91c98 | 757 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 758 | { |
5eb91c98 | 759 | int ret; |
7a485870 DG |
760 | struct ltt_session *session; |
761 | struct ltt_kernel_channel *channel; | |
762 | ||
5eb91c98 | 763 | DBG("Updating kernel poll set"); |
7a485870 | 764 | |
54d01ffb | 765 | session_lock_list(); |
b5541356 | 766 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 767 | session_lock(session); |
7a485870 | 768 | if (session->kernel_session == NULL) { |
54d01ffb | 769 | session_unlock(session); |
7a485870 DG |
770 | continue; |
771 | } | |
7a485870 | 772 | |
54d01ffb DG |
773 | cds_list_for_each_entry(channel, |
774 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
775 | /* Add channel fd to the kernel poll set */ |
776 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
777 | if (ret < 0) { | |
54d01ffb | 778 | session_unlock(session); |
5eb91c98 DG |
779 | goto error; |
780 | } | |
781 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 782 | } |
54d01ffb | 783 | session_unlock(session); |
7a485870 | 784 | } |
54d01ffb | 785 | session_unlock_list(); |
7a485870 | 786 | |
5eb91c98 | 787 | return 0; |
7a485870 DG |
788 | |
789 | error: | |
54d01ffb | 790 | session_unlock_list(); |
7a485870 DG |
791 | return -1; |
792 | } | |
793 | ||
794 | /* | |
54d01ffb | 795 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 796 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 797 | * |
d063d709 | 798 | * Useful for CPU hotplug feature. |
7a485870 | 799 | */ |
2bdd86d4 | 800 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
801 | { |
802 | int ret = 0; | |
803 | struct ltt_session *session; | |
173af62f | 804 | struct ltt_kernel_session *ksess; |
7a485870 DG |
805 | struct ltt_kernel_channel *channel; |
806 | ||
807 | DBG("Updating kernel streams for channel fd %d", fd); | |
808 | ||
54d01ffb | 809 | session_lock_list(); |
b5541356 | 810 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 811 | session_lock(session); |
7a485870 | 812 | if (session->kernel_session == NULL) { |
54d01ffb | 813 | session_unlock(session); |
7a485870 DG |
814 | continue; |
815 | } | |
173af62f | 816 | ksess = session->kernel_session; |
d9800920 | 817 | |
4a15001e MD |
818 | cds_list_for_each_entry(channel, |
819 | &ksess->channel_list.head, list) { | |
820 | struct lttng_ht_iter iter; | |
821 | struct consumer_socket *socket; | |
d9800920 | 822 | |
4a15001e MD |
823 | if (channel->fd != fd) { |
824 | continue; | |
825 | } | |
826 | DBG("Channel found, updating kernel streams"); | |
827 | ret = kernel_open_channel_stream(channel); | |
828 | if (ret < 0) { | |
829 | goto error; | |
830 | } | |
831 | /* Update the stream global counter */ | |
832 | ksess->stream_count_global += ret; | |
833 | ||
834 | /* | |
835 | * Have we already sent fds to the consumer? If yes, it | |
836 | * means that tracing is started so it is safe to send | |
837 | * our updated stream fds. | |
838 | */ | |
839 | if (ksess->consumer_fds_sent != 1 | |
840 | || ksess->consumer == NULL) { | |
841 | ret = -1; | |
842 | goto error; | |
843 | } | |
844 | ||
845 | rcu_read_lock(); | |
846 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, | |
847 | &iter.iter, socket, node.node) { | |
848 | pthread_mutex_lock(socket->lock); | |
849 | ret = kernel_consumer_send_channel_stream(socket, | |
850 | channel, ksess, | |
851 | session->output_traces ? 1 : 0); | |
852 | pthread_mutex_unlock(socket->lock); | |
853 | if (ret < 0) { | |
e7fe706f | 854 | rcu_read_unlock(); |
4a15001e | 855 | goto error; |
7a485870 | 856 | } |
7a485870 | 857 | } |
4a15001e | 858 | rcu_read_unlock(); |
7a485870 | 859 | } |
54d01ffb | 860 | session_unlock(session); |
7a485870 | 861 | } |
54d01ffb | 862 | session_unlock_list(); |
b3c750d2 | 863 | return ret; |
7a485870 | 864 | |
b3c750d2 | 865 | error: |
54d01ffb DG |
866 | session_unlock(session); |
867 | session_unlock_list(); | |
7a485870 DG |
868 | return ret; |
869 | } | |
870 | ||
487cf67c | 871 | /* |
ffe60014 DG |
872 | * For each tracing session, update newly registered apps. The session list |
873 | * lock MUST be acquired before calling this. | |
487cf67c DG |
874 | */ |
875 | static void update_ust_app(int app_sock) | |
876 | { | |
877 | struct ltt_session *sess, *stmp; | |
878 | ||
fdadac08 DG |
879 | /* Consumer is in an ERROR state. Stop any application update. */ |
880 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
881 | /* Stop the update process since the consumer is dead. */ | |
882 | return; | |
883 | } | |
884 | ||
487cf67c DG |
885 | /* For all tracing session(s) */ |
886 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
a9ad0c8f MD |
887 | struct ust_app *app; |
888 | ||
4ee14516 | 889 | session_lock(sess); |
a9ad0c8f MD |
890 | if (!sess->ust_session) { |
891 | goto unlock_session; | |
892 | } | |
893 | ||
894 | rcu_read_lock(); | |
895 | assert(app_sock >= 0); | |
896 | app = ust_app_find_by_sock(app_sock); | |
897 | if (app == NULL) { | |
898 | /* | |
899 | * Application can be unregistered before so | |
900 | * this is possible hence simply stopping the | |
901 | * update. | |
902 | */ | |
903 | DBG3("UST app update failed to find app sock %d", | |
904 | app_sock); | |
905 | goto unlock_rcu; | |
421cb601 | 906 | } |
a9ad0c8f MD |
907 | ust_app_global_update(sess->ust_session, app); |
908 | unlock_rcu: | |
909 | rcu_read_unlock(); | |
910 | unlock_session: | |
4ee14516 | 911 | session_unlock(sess); |
487cf67c DG |
912 | } |
913 | } | |
914 | ||
7a485870 | 915 | /* |
d063d709 | 916 | * This thread manage event coming from the kernel. |
7a485870 | 917 | * |
d063d709 DG |
918 | * Features supported in this thread: |
919 | * -) CPU Hotplug | |
7a485870 DG |
920 | */ |
921 | static void *thread_manage_kernel(void *data) | |
922 | { | |
139ac872 | 923 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 924 | uint32_t revents, nb_fd; |
7a485870 | 925 | char tmp; |
5eb91c98 | 926 | struct lttng_poll_event events; |
7a485870 | 927 | |
6993eeb3 | 928 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 929 | |
6c71277b | 930 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 931 | |
d5d63bf1 DG |
932 | /* |
933 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 934 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 935 | */ |
6d737ce4 | 936 | lttng_poll_init(&events); |
d5d63bf1 | 937 | |
e547b070 | 938 | if (testpoint(sessiond_thread_manage_kernel)) { |
6993eeb3 CB |
939 | goto error_testpoint; |
940 | } | |
8ac94142 | 941 | |
840cb59c | 942 | health_code_update(); |
44a5e5eb | 943 | |
e547b070 | 944 | if (testpoint(sessiond_thread_manage_kernel_before_loop)) { |
d21b0d71 | 945 | goto error_testpoint; |
6993eeb3 CB |
946 | } |
947 | ||
7a485870 | 948 | while (1) { |
840cb59c | 949 | health_code_update(); |
44a5e5eb | 950 | |
7a485870 | 951 | if (update_poll_flag == 1) { |
d21b0d71 DG |
952 | /* Clean events object. We are about to populate it again. */ |
953 | lttng_poll_clean(&events); | |
954 | ||
d0b96690 | 955 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
956 | if (ret < 0) { |
957 | goto error_poll_create; | |
958 | } | |
959 | ||
960 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
961 | if (ret < 0) { | |
962 | goto error; | |
963 | } | |
5f822d0a | 964 | |
d21b0d71 | 965 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
966 | ret = update_kernel_poll(&events); |
967 | if (ret < 0) { | |
7a485870 DG |
968 | goto error; |
969 | } | |
970 | update_poll_flag = 0; | |
971 | } | |
972 | ||
7fa2082e | 973 | DBG("Thread kernel polling"); |
7a485870 DG |
974 | |
975 | /* Poll infinite value of time */ | |
88f2b785 | 976 | restart: |
a78af745 | 977 | health_poll_entry(); |
5eb91c98 | 978 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
979 | DBG("Thread kernel return from poll on %d fds", |
980 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 981 | health_poll_exit(); |
7a485870 | 982 | if (ret < 0) { |
88f2b785 MD |
983 | /* |
984 | * Restart interrupted system call. | |
985 | */ | |
986 | if (errno == EINTR) { | |
987 | goto restart; | |
988 | } | |
7a485870 DG |
989 | goto error; |
990 | } else if (ret == 0) { | |
991 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
992 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
993 | "This should not have happened! Continuing..."); | |
7a485870 DG |
994 | continue; |
995 | } | |
996 | ||
0d9c5d77 DG |
997 | nb_fd = ret; |
998 | ||
5eb91c98 DG |
999 | for (i = 0; i < nb_fd; i++) { |
1000 | /* Fetch once the poll data */ | |
1001 | revents = LTTNG_POLL_GETEV(&events, i); | |
1002 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 1003 | |
840cb59c | 1004 | health_code_update(); |
44a5e5eb | 1005 | |
fd20dac9 MD |
1006 | if (!revents) { |
1007 | /* No activity for this FD (poll implementation). */ | |
1008 | continue; | |
1009 | } | |
1010 | ||
5eb91c98 | 1011 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1012 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1013 | if (ret) { |
139ac872 MD |
1014 | err = 0; |
1015 | goto exit; | |
5eb91c98 | 1016 | } |
7a485870 | 1017 | |
5eb91c98 | 1018 | /* Check for data on kernel pipe */ |
03e43155 MD |
1019 | if (revents & LPOLLIN) { |
1020 | if (pollfd == kernel_poll_pipe[0]) { | |
1021 | (void) lttng_read(kernel_poll_pipe[0], | |
1022 | &tmp, 1); | |
1023 | /* | |
1024 | * Ret value is useless here, if this pipe gets any actions an | |
1025 | * update is required anyway. | |
1026 | */ | |
1027 | update_poll_flag = 1; | |
1028 | continue; | |
1029 | } else { | |
1030 | /* | |
1031 | * New CPU detected by the kernel. Adding kernel stream to | |
1032 | * kernel session and updating the kernel consumer | |
1033 | */ | |
2bdd86d4 | 1034 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
1035 | if (ret < 0) { |
1036 | continue; | |
1037 | } | |
1038 | break; | |
7a485870 | 1039 | } |
03e43155 MD |
1040 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1041 | update_poll_flag = 1; | |
1042 | continue; | |
1043 | } else { | |
1044 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1045 | goto error; | |
7a485870 DG |
1046 | } |
1047 | } | |
1048 | } | |
1049 | ||
139ac872 | 1050 | exit: |
7a485870 | 1051 | error: |
5eb91c98 | 1052 | lttng_poll_clean(&events); |
76d7553f | 1053 | error_poll_create: |
6993eeb3 | 1054 | error_testpoint: |
6620da75 DG |
1055 | utils_close_pipe(kernel_poll_pipe); |
1056 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 1057 | if (err) { |
840cb59c | 1058 | health_error(); |
139ac872 | 1059 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
1060 | WARN("Kernel thread died unexpectedly. " |
1061 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 1062 | } |
8782cc74 | 1063 | health_unregister(health_sessiond); |
76d7553f | 1064 | DBG("Kernel thread dying"); |
7a485870 DG |
1065 | return NULL; |
1066 | } | |
1067 | ||
a23ec3a7 DG |
1068 | /* |
1069 | * Signal pthread condition of the consumer data that the thread. | |
1070 | */ | |
1071 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
1072 | { | |
1073 | pthread_mutex_lock(&data->cond_mutex); | |
1074 | ||
1075 | /* | |
1076 | * The state is set before signaling. It can be any value, it's the waiter | |
1077 | * job to correctly interpret this condition variable associated to the | |
1078 | * consumer pthread_cond. | |
1079 | * | |
1080 | * A value of 0 means that the corresponding thread of the consumer data | |
1081 | * was not started. 1 indicates that the thread has started and is ready | |
1082 | * for action. A negative value means that there was an error during the | |
1083 | * thread bootstrap. | |
1084 | */ | |
1085 | data->consumer_thread_is_ready = state; | |
1086 | (void) pthread_cond_signal(&data->cond); | |
1087 | ||
1088 | pthread_mutex_unlock(&data->cond_mutex); | |
1089 | } | |
1090 | ||
1d4b027a | 1091 | /* |
3bd1e081 | 1092 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 1093 | */ |
3bd1e081 | 1094 | static void *thread_manage_consumer(void *data) |
1d4b027a | 1095 | { |
42fc1d0b | 1096 | int sock = -1, i, ret, pollfd, err = -1, should_quit = 0; |
5eb91c98 | 1097 | uint32_t revents, nb_fd; |
1d4b027a | 1098 | enum lttcomm_return_code code; |
5eb91c98 | 1099 | struct lttng_poll_event events; |
3bd1e081 | 1100 | struct consumer_data *consumer_data = data; |
b3530820 | 1101 | struct consumer_socket *cmd_socket_wrapper = NULL; |
1d4b027a | 1102 | |
3bd1e081 | 1103 | DBG("[thread] Manage consumer started"); |
1d4b027a | 1104 | |
34c1e15a MD |
1105 | rcu_register_thread(); |
1106 | rcu_thread_online(); | |
1107 | ||
6c71277b | 1108 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 1109 | |
855060f8 | 1110 | health_code_update(); |
9449cc75 | 1111 | |
5eb91c98 | 1112 | /* |
331744e3 JD |
1113 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
1114 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 1115 | */ |
331744e3 | 1116 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 1117 | if (ret < 0) { |
76d7553f | 1118 | goto error_poll; |
5eb91c98 | 1119 | } |
273ea72c | 1120 | |
edb8b045 DG |
1121 | /* |
1122 | * The error socket here is already in a listening state which was done | |
1123 | * just before spawning this thread to avoid a race between the consumer | |
1124 | * daemon exec trying to connect and the listen() call. | |
1125 | */ | |
3bd1e081 | 1126 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
1127 | if (ret < 0) { |
1128 | goto error; | |
1129 | } | |
1130 | ||
840cb59c | 1131 | health_code_update(); |
44a5e5eb | 1132 | |
331744e3 | 1133 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1134 | restart: |
a78af745 | 1135 | health_poll_entry(); |
8ac94142 | 1136 | |
e547b070 | 1137 | if (testpoint(sessiond_thread_manage_consumer)) { |
6993eeb3 CB |
1138 | goto error; |
1139 | } | |
8ac94142 | 1140 | |
5eb91c98 | 1141 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1142 | health_poll_exit(); |
273ea72c | 1143 | if (ret < 0) { |
88f2b785 MD |
1144 | /* |
1145 | * Restart interrupted system call. | |
1146 | */ | |
1147 | if (errno == EINTR) { | |
1148 | goto restart; | |
1149 | } | |
273ea72c DG |
1150 | goto error; |
1151 | } | |
1152 | ||
0d9c5d77 DG |
1153 | nb_fd = ret; |
1154 | ||
5eb91c98 DG |
1155 | for (i = 0; i < nb_fd; i++) { |
1156 | /* Fetch once the poll data */ | |
1157 | revents = LTTNG_POLL_GETEV(&events, i); | |
1158 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1159 | ||
840cb59c | 1160 | health_code_update(); |
44a5e5eb | 1161 | |
fd20dac9 MD |
1162 | if (!revents) { |
1163 | /* No activity for this FD (poll implementation). */ | |
1164 | continue; | |
1165 | } | |
1166 | ||
5eb91c98 | 1167 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1168 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1169 | if (ret) { |
139ac872 MD |
1170 | err = 0; |
1171 | goto exit; | |
5eb91c98 DG |
1172 | } |
1173 | ||
1174 | /* Event on the registration socket */ | |
3bd1e081 | 1175 | if (pollfd == consumer_data->err_sock) { |
03e43155 MD |
1176 | if (revents & LPOLLIN) { |
1177 | continue; | |
1178 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3bd1e081 | 1179 | ERR("consumer err socket poll error"); |
5eb91c98 | 1180 | goto error; |
03e43155 MD |
1181 | } else { |
1182 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1183 | goto error; | |
5eb91c98 DG |
1184 | } |
1185 | } | |
273ea72c DG |
1186 | } |
1187 | ||
3bd1e081 | 1188 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1189 | if (sock < 0) { |
1190 | goto error; | |
1191 | } | |
1192 | ||
b662582b DG |
1193 | /* |
1194 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1195 | * show must go on. | |
1196 | */ | |
1197 | (void) utils_set_fd_cloexec(sock); | |
1198 | ||
840cb59c | 1199 | health_code_update(); |
44a5e5eb | 1200 | |
3bd1e081 | 1201 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1202 | |
712ea556 | 1203 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1204 | ret = lttcomm_recv_unix_sock(sock, &code, |
1205 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1206 | if (ret <= 0) { |
1207 | goto error; | |
1208 | } | |
1209 | ||
840cb59c | 1210 | health_code_update(); |
b3530820 | 1211 | if (code != LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
3bd1e081 | 1212 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1213 | lttcomm_get_readable_code(-code)); |
1214 | goto error; | |
1215 | } | |
1216 | ||
b3530820 JG |
1217 | /* Connect both command and metadata sockets. */ |
1218 | consumer_data->cmd_sock = | |
1219 | lttcomm_connect_unix_sock( | |
1220 | consumer_data->cmd_unix_sock_path); | |
1221 | consumer_data->metadata_fd = | |
1222 | lttcomm_connect_unix_sock( | |
1223 | consumer_data->cmd_unix_sock_path); | |
1224 | if (consumer_data->cmd_sock < 0 || consumer_data->metadata_fd < 0) { | |
1225 | PERROR("consumer connect cmd socket"); | |
1226 | /* On error, signal condition and quit. */ | |
1227 | signal_consumer_condition(consumer_data, -1); | |
1228 | goto error; | |
1229 | } | |
1230 | ||
1231 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; | |
1232 | ||
1233 | /* Create metadata socket lock. */ | |
1234 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1235 | if (consumer_data->metadata_sock.lock == NULL) { | |
1236 | PERROR("zmalloc pthread mutex"); | |
1237 | goto error; | |
1238 | } | |
1239 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1240 | ||
1241 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); | |
1242 | DBG("Consumer metadata socket ready (fd: %d)", | |
1243 | consumer_data->metadata_fd); | |
1244 | ||
1245 | /* | |
1246 | * Remove the consumerd error sock since we've established a connection. | |
1247 | */ | |
3bd1e081 | 1248 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1249 | if (ret < 0) { |
72079cae DG |
1250 | goto error; |
1251 | } | |
1252 | ||
331744e3 | 1253 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1254 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1255 | if (ret < 0) { | |
72079cae | 1256 | goto error; |
5eb91c98 DG |
1257 | } |
1258 | ||
331744e3 | 1259 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1260 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1261 | LPOLLIN | LPOLLRDHUP); |
1262 | if (ret < 0) { | |
1263 | goto error; | |
1264 | } | |
1265 | ||
840cb59c | 1266 | health_code_update(); |
44a5e5eb | 1267 | |
b3530820 JG |
1268 | /* |
1269 | * Transfer the write-end of the channel monitoring pipe to the | |
1270 | * by issuing a SET_CHANNEL_MONITOR_PIPE command. | |
1271 | */ | |
1272 | cmd_socket_wrapper = consumer_allocate_socket(&consumer_data->cmd_sock); | |
1273 | if (!cmd_socket_wrapper) { | |
1274 | goto error; | |
1275 | } | |
3e4dc117 | 1276 | cmd_socket_wrapper->lock = &consumer_data->lock; |
b3530820 JG |
1277 | |
1278 | ret = consumer_send_channel_monitor_pipe(cmd_socket_wrapper, | |
1279 | consumer_data->channel_monitor_pipe); | |
1280 | if (ret) { | |
1281 | goto error; | |
1282 | } | |
1283 | /* Discard the socket wrapper as it is no longer needed. */ | |
1284 | consumer_destroy_socket(cmd_socket_wrapper); | |
1285 | cmd_socket_wrapper = NULL; | |
1286 | ||
1287 | /* The thread is completely initialized, signal that it is ready. */ | |
1288 | signal_consumer_condition(consumer_data, 1); | |
1289 | ||
331744e3 | 1290 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1291 | restart_poll: |
331744e3 | 1292 | while (1) { |
42fc1d0b DG |
1293 | health_code_update(); |
1294 | ||
1295 | /* Exit the thread because the thread quit pipe has been triggered. */ | |
1296 | if (should_quit) { | |
1297 | /* Not a health error. */ | |
1298 | err = 0; | |
1299 | goto exit; | |
1300 | } | |
1301 | ||
331744e3 JD |
1302 | health_poll_entry(); |
1303 | ret = lttng_poll_wait(&events, -1); | |
1304 | health_poll_exit(); | |
1305 | if (ret < 0) { | |
1306 | /* | |
1307 | * Restart interrupted system call. | |
1308 | */ | |
1309 | if (errno == EINTR) { | |
1310 | goto restart_poll; | |
1311 | } | |
1312 | goto error; | |
88f2b785 | 1313 | } |
72079cae | 1314 | |
331744e3 | 1315 | nb_fd = ret; |
0d9c5d77 | 1316 | |
331744e3 JD |
1317 | for (i = 0; i < nb_fd; i++) { |
1318 | /* Fetch once the poll data */ | |
1319 | revents = LTTNG_POLL_GETEV(&events, i); | |
1320 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1321 | |
331744e3 | 1322 | health_code_update(); |
44a5e5eb | 1323 | |
fd20dac9 MD |
1324 | if (!revents) { |
1325 | /* No activity for this FD (poll implementation). */ | |
1326 | continue; | |
1327 | } | |
1328 | ||
42fc1d0b DG |
1329 | /* |
1330 | * Thread quit pipe has been triggered, flag that we should stop | |
1331 | * but continue the current loop to handle potential data from | |
1332 | * consumer. | |
1333 | */ | |
1334 | should_quit = sessiond_check_thread_quit_pipe(pollfd, revents); | |
5eb91c98 | 1335 | |
331744e3 JD |
1336 | if (pollfd == sock) { |
1337 | /* Event on the consumerd socket */ | |
03e43155 MD |
1338 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1339 | && !(revents & LPOLLIN)) { | |
331744e3 JD |
1340 | ERR("consumer err socket second poll error"); |
1341 | goto error; | |
1342 | } | |
1343 | health_code_update(); | |
1344 | /* Wait for any kconsumerd error */ | |
1345 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1346 | sizeof(enum lttcomm_return_code)); | |
1347 | if (ret <= 0) { | |
1348 | ERR("consumer closed the command socket"); | |
1349 | goto error; | |
1350 | } | |
1351 | ||
1352 | ERR("consumer return code : %s", | |
1353 | lttcomm_get_readable_code(-code)); | |
1354 | ||
1355 | goto exit; | |
4ce514c4 | 1356 | } else if (pollfd == consumer_data->metadata_fd) { |
03e43155 MD |
1357 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP) |
1358 | && !(revents & LPOLLIN)) { | |
1359 | ERR("consumer err metadata socket second poll error"); | |
1360 | goto error; | |
1361 | } | |
331744e3 JD |
1362 | /* UST metadata requests */ |
1363 | ret = ust_consumer_metadata_request( | |
1364 | &consumer_data->metadata_sock); | |
1365 | if (ret < 0) { | |
1366 | ERR("Handling metadata request"); | |
1367 | goto error; | |
1368 | } | |
5eb91c98 | 1369 | } |
42fc1d0b | 1370 | /* No need for an else branch all FDs are tested prior. */ |
5eb91c98 | 1371 | } |
331744e3 | 1372 | health_code_update(); |
5eb91c98 DG |
1373 | } |
1374 | ||
139ac872 | 1375 | exit: |
1d4b027a | 1376 | error: |
fdadac08 DG |
1377 | /* |
1378 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1379 | * thread might be using them so get exclusive access which will abort all |
1380 | * other consumer command by other threads. | |
fdadac08 DG |
1381 | */ |
1382 | pthread_mutex_lock(&consumer_data->lock); | |
1383 | ||
5c827ce0 DG |
1384 | /* Immediately set the consumerd state to stopped */ |
1385 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1386 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1387 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1388 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1389 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1390 | } else { | |
1391 | /* Code flow error... */ | |
1392 | assert(0); | |
1393 | } | |
1394 | ||
76d7553f MD |
1395 | if (consumer_data->err_sock >= 0) { |
1396 | ret = close(consumer_data->err_sock); | |
1397 | if (ret) { | |
1398 | PERROR("close"); | |
1399 | } | |
a76cbd9f | 1400 | consumer_data->err_sock = -1; |
76d7553f MD |
1401 | } |
1402 | if (consumer_data->cmd_sock >= 0) { | |
1403 | ret = close(consumer_data->cmd_sock); | |
1404 | if (ret) { | |
1405 | PERROR("close"); | |
1406 | } | |
a76cbd9f | 1407 | consumer_data->cmd_sock = -1; |
76d7553f | 1408 | } |
96544455 SS |
1409 | if (consumer_data->metadata_sock.fd_ptr && |
1410 | *consumer_data->metadata_sock.fd_ptr >= 0) { | |
9363801e | 1411 | ret = close(*consumer_data->metadata_sock.fd_ptr); |
331744e3 JD |
1412 | if (ret) { |
1413 | PERROR("close"); | |
1414 | } | |
1415 | } | |
76d7553f MD |
1416 | if (sock >= 0) { |
1417 | ret = close(sock); | |
1418 | if (ret) { | |
1419 | PERROR("close"); | |
1420 | } | |
1421 | } | |
273ea72c | 1422 | |
3bd1e081 MD |
1423 | unlink(consumer_data->err_unix_sock_path); |
1424 | unlink(consumer_data->cmd_unix_sock_path); | |
fdadac08 | 1425 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1426 | |
fdadac08 | 1427 | /* Cleanup metadata socket mutex. */ |
96544455 SS |
1428 | if (consumer_data->metadata_sock.lock) { |
1429 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1430 | free(consumer_data->metadata_sock.lock); | |
1431 | } | |
5eb91c98 | 1432 | lttng_poll_clean(&events); |
b3530820 JG |
1433 | |
1434 | if (cmd_socket_wrapper) { | |
1435 | consumer_destroy_socket(cmd_socket_wrapper); | |
1436 | } | |
76d7553f | 1437 | error_poll: |
139ac872 | 1438 | if (err) { |
840cb59c | 1439 | health_error(); |
139ac872 MD |
1440 | ERR("Health error occurred in %s", __func__); |
1441 | } | |
8782cc74 | 1442 | health_unregister(health_sessiond); |
76d7553f | 1443 | DBG("consumer thread cleanup completed"); |
0177d773 | 1444 | |
34c1e15a MD |
1445 | rcu_thread_offline(); |
1446 | rcu_unregister_thread(); | |
1447 | ||
5eb91c98 | 1448 | return NULL; |
099e26bd DG |
1449 | } |
1450 | ||
099e26bd | 1451 | /* |
81f04d5f JG |
1452 | * This thread receives application command sockets (FDs) on the |
1453 | * apps_cmd_pipe and waits (polls) on them until they are closed | |
1454 | * or an error occurs. | |
1455 | * | |
1456 | * At that point, it flushes the data (tracing and metadata) associated | |
1457 | * with this application and tears down ust app sessions and other | |
1458 | * associated data structures through ust_app_unregister(). | |
1459 | * | |
1460 | * Note that this thread never sends commands to the applications | |
1461 | * through the command sockets; it merely listens for hang-ups | |
1462 | * and errors on those sockets and cleans-up as they occur. | |
1d4b027a DG |
1463 | */ |
1464 | static void *thread_manage_apps(void *data) | |
099e26bd | 1465 | { |
139ac872 | 1466 | int i, ret, pollfd, err = -1; |
6cd525e8 | 1467 | ssize_t size_ret; |
5eb91c98 | 1468 | uint32_t revents, nb_fd; |
5eb91c98 | 1469 | struct lttng_poll_event events; |
099e26bd DG |
1470 | |
1471 | DBG("[thread] Manage application started"); | |
1472 | ||
f6a9efaa DG |
1473 | rcu_register_thread(); |
1474 | rcu_thread_online(); | |
1475 | ||
6c71277b | 1476 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1477 | |
e547b070 | 1478 | if (testpoint(sessiond_thread_manage_apps)) { |
6993eeb3 CB |
1479 | goto error_testpoint; |
1480 | } | |
1481 | ||
840cb59c | 1482 | health_code_update(); |
44a5e5eb | 1483 | |
d0b96690 | 1484 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1485 | if (ret < 0) { |
76d7553f | 1486 | goto error_poll_create; |
5eb91c98 | 1487 | } |
099e26bd | 1488 | |
5eb91c98 DG |
1489 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1490 | if (ret < 0) { | |
1491 | goto error; | |
1492 | } | |
099e26bd | 1493 | |
e547b070 | 1494 | if (testpoint(sessiond_thread_manage_apps_before_loop)) { |
6993eeb3 CB |
1495 | goto error; |
1496 | } | |
8ac94142 | 1497 | |
840cb59c | 1498 | health_code_update(); |
44a5e5eb | 1499 | |
5eb91c98 | 1500 | while (1) { |
7fa2082e | 1501 | DBG("Apps thread polling"); |
099e26bd DG |
1502 | |
1503 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1504 | restart: |
a78af745 | 1505 | health_poll_entry(); |
5eb91c98 | 1506 | ret = lttng_poll_wait(&events, -1); |
7fa2082e MD |
1507 | DBG("Apps thread return from poll on %d fds", |
1508 | LTTNG_POLL_GETNB(&events)); | |
a78af745 | 1509 | health_poll_exit(); |
099e26bd | 1510 | if (ret < 0) { |
88f2b785 MD |
1511 | /* |
1512 | * Restart interrupted system call. | |
1513 | */ | |
1514 | if (errno == EINTR) { | |
1515 | goto restart; | |
1516 | } | |
099e26bd DG |
1517 | goto error; |
1518 | } | |
1519 | ||
0d9c5d77 DG |
1520 | nb_fd = ret; |
1521 | ||
5eb91c98 DG |
1522 | for (i = 0; i < nb_fd; i++) { |
1523 | /* Fetch once the poll data */ | |
1524 | revents = LTTNG_POLL_GETEV(&events, i); | |
1525 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1526 | ||
840cb59c | 1527 | health_code_update(); |
44a5e5eb | 1528 | |
fd20dac9 MD |
1529 | if (!revents) { |
1530 | /* No activity for this FD (poll implementation). */ | |
1531 | continue; | |
1532 | } | |
1533 | ||
5eb91c98 | 1534 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1535 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1536 | if (ret) { |
139ac872 MD |
1537 | err = 0; |
1538 | goto exit; | |
5eb91c98 | 1539 | } |
099e26bd | 1540 | |
5eb91c98 DG |
1541 | /* Inspect the apps cmd pipe */ |
1542 | if (pollfd == apps_cmd_pipe[0]) { | |
03e43155 | 1543 | if (revents & LPOLLIN) { |
d0b96690 DG |
1544 | int sock; |
1545 | ||
5eb91c98 | 1546 | /* Empty pipe */ |
6cd525e8 MD |
1547 | size_ret = lttng_read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
1548 | if (size_ret < sizeof(sock)) { | |
76d7553f | 1549 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1550 | goto error; |
1551 | } | |
099e26bd | 1552 | |
840cb59c | 1553 | health_code_update(); |
44a5e5eb | 1554 | |
ffe60014 | 1555 | /* |
03e43155 MD |
1556 | * Since this is a command socket (write then read), |
1557 | * we only monitor the error events of the socket. | |
ffe60014 | 1558 | */ |
d0b96690 DG |
1559 | ret = lttng_poll_add(&events, sock, |
1560 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1561 | if (ret < 0) { | |
5eb91c98 | 1562 | goto error; |
e0c7ec2b | 1563 | } |
acc7b41b | 1564 | |
d0b96690 | 1565 | DBG("Apps with sock %d added to poll set", sock); |
03e43155 MD |
1566 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
1567 | ERR("Apps command pipe error"); | |
1568 | goto error; | |
1569 | } else { | |
1570 | ERR("Unknown poll events %u for sock %d", revents, pollfd); | |
1571 | goto error; | |
0177d773 | 1572 | } |
5eb91c98 DG |
1573 | } else { |
1574 | /* | |
54d01ffb DG |
1575 | * At this point, we know that a registered application made |
1576 | * the event at poll_wait. | |
5eb91c98 DG |
1577 | */ |
1578 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1579 | /* Removing from the poll set */ | |
1580 | ret = lttng_poll_del(&events, pollfd); | |
1581 | if (ret < 0) { | |
1582 | goto error; | |
1583 | } | |
099e26bd | 1584 | |
b9d9b220 | 1585 | /* Socket closed on remote end. */ |
56fff090 | 1586 | ust_app_unregister(pollfd); |
03e43155 MD |
1587 | } else { |
1588 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1589 | goto error; | |
5eb91c98 | 1590 | } |
099e26bd | 1591 | } |
44a5e5eb | 1592 | |
840cb59c | 1593 | health_code_update(); |
099e26bd | 1594 | } |
099e26bd DG |
1595 | } |
1596 | ||
139ac872 | 1597 | exit: |
099e26bd | 1598 | error: |
5eb91c98 | 1599 | lttng_poll_clean(&events); |
76d7553f | 1600 | error_poll_create: |
6993eeb3 | 1601 | error_testpoint: |
6620da75 DG |
1602 | utils_close_pipe(apps_cmd_pipe); |
1603 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1604 | ||
1605 | /* | |
1606 | * We don't clean the UST app hash table here since already registered | |
1607 | * applications can still be controlled so let them be until the session | |
1608 | * daemon dies or the applications stop. | |
1609 | */ | |
1610 | ||
139ac872 | 1611 | if (err) { |
840cb59c | 1612 | health_error(); |
139ac872 MD |
1613 | ERR("Health error occurred in %s", __func__); |
1614 | } | |
8782cc74 | 1615 | health_unregister(health_sessiond); |
76d7553f | 1616 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1617 | rcu_thread_offline(); |
1618 | rcu_unregister_thread(); | |
099e26bd DG |
1619 | return NULL; |
1620 | } | |
1621 | ||
d0b96690 | 1622 | /* |
d88aee68 DG |
1623 | * Send a socket to a thread This is called from the dispatch UST registration |
1624 | * thread once all sockets are set for the application. | |
d0b96690 | 1625 | * |
b85dc84c DG |
1626 | * The sock value can be invalid, we don't really care, the thread will handle |
1627 | * it and make the necessary cleanup if so. | |
1628 | * | |
d0b96690 DG |
1629 | * On success, return 0 else a negative value being the errno message of the |
1630 | * write(). | |
1631 | */ | |
d88aee68 | 1632 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 | 1633 | { |
6cd525e8 | 1634 | ssize_t ret; |
d0b96690 | 1635 | |
b85dc84c DG |
1636 | /* |
1637 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1638 | * before calling this function being a shutdown state of the thread. | |
1639 | */ | |
1640 | if (fd < 0) { | |
1641 | ret = -EBADF; | |
1642 | goto error; | |
1643 | } | |
d0b96690 | 1644 | |
6cd525e8 MD |
1645 | ret = lttng_write(fd, &sock, sizeof(sock)); |
1646 | if (ret < sizeof(sock)) { | |
d88aee68 | 1647 | PERROR("write apps pipe %d", fd); |
d0b96690 DG |
1648 | if (ret < 0) { |
1649 | ret = -errno; | |
1650 | } | |
1651 | goto error; | |
1652 | } | |
1653 | ||
1654 | /* All good. Don't send back the write positive ret value. */ | |
1655 | ret = 0; | |
1656 | error: | |
6cd525e8 | 1657 | return (int) ret; |
d0b96690 DG |
1658 | } |
1659 | ||
f45e313d DG |
1660 | /* |
1661 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1662 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1663 | * notify socket is never received. | |
1664 | */ | |
1665 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1666 | { | |
1667 | int ret, nb_fd = 0, i; | |
1668 | unsigned int fd_added = 0; | |
1669 | struct lttng_poll_event events; | |
1670 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1671 | ||
1672 | assert(wait_queue); | |
1673 | ||
1674 | lttng_poll_init(&events); | |
1675 | ||
1676 | /* Just skip everything for an empty queue. */ | |
1677 | if (!wait_queue->count) { | |
1678 | goto end; | |
1679 | } | |
1680 | ||
1681 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1682 | if (ret < 0) { | |
1683 | goto error_create; | |
1684 | } | |
1685 | ||
1686 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1687 | &wait_queue->head, head) { | |
1688 | assert(wait_node->app); | |
1689 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1690 | LPOLLHUP | LPOLLERR); | |
1691 | if (ret < 0) { | |
1692 | goto error; | |
1693 | } | |
1694 | ||
1695 | fd_added = 1; | |
1696 | } | |
1697 | ||
1698 | if (!fd_added) { | |
1699 | goto end; | |
1700 | } | |
1701 | ||
1702 | /* | |
1703 | * Poll but don't block so we can quickly identify the faulty events and | |
1704 | * clean them afterwards from the wait queue. | |
1705 | */ | |
1706 | ret = lttng_poll_wait(&events, 0); | |
1707 | if (ret < 0) { | |
1708 | goto error; | |
1709 | } | |
1710 | nb_fd = ret; | |
1711 | ||
1712 | for (i = 0; i < nb_fd; i++) { | |
1713 | /* Get faulty FD. */ | |
1714 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1715 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1716 | ||
fd20dac9 MD |
1717 | if (!revents) { |
1718 | /* No activity for this FD (poll implementation). */ | |
1719 | continue; | |
1720 | } | |
1721 | ||
f45e313d DG |
1722 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
1723 | &wait_queue->head, head) { | |
1724 | if (pollfd == wait_node->app->sock && | |
1725 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1726 | cds_list_del(&wait_node->head); | |
1727 | wait_queue->count--; | |
1728 | ust_app_destroy(wait_node->app); | |
1729 | free(wait_node); | |
48b40bcf JG |
1730 | /* |
1731 | * Silence warning of use-after-free in | |
1732 | * cds_list_for_each_entry_safe which uses | |
1733 | * __typeof__(*wait_node). | |
1734 | */ | |
1735 | wait_node = NULL; | |
f45e313d | 1736 | break; |
03e43155 MD |
1737 | } else { |
1738 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
1739 | goto error; | |
f45e313d DG |
1740 | } |
1741 | } | |
1742 | } | |
1743 | ||
1744 | if (nb_fd > 0) { | |
1745 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1746 | } | |
1747 | ||
1748 | end: | |
1749 | lttng_poll_clean(&events); | |
1750 | return; | |
1751 | ||
1752 | error: | |
1753 | lttng_poll_clean(&events); | |
1754 | error_create: | |
1755 | ERR("Unable to sanitize wait queue"); | |
1756 | return; | |
1757 | } | |
1758 | ||
099e26bd DG |
1759 | /* |
1760 | * Dispatch request from the registration threads to the application | |
1761 | * communication thread. | |
1762 | */ | |
1763 | static void *thread_dispatch_ust_registration(void *data) | |
1764 | { | |
12e2b881 | 1765 | int ret, err = -1; |
8bdee6e2 | 1766 | struct cds_wfcq_node *node; |
099e26bd | 1767 | struct ust_command *ust_cmd = NULL; |
f45e313d DG |
1768 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1769 | struct ust_reg_wait_queue wait_queue = { | |
1770 | .count = 0, | |
1771 | }; | |
d0b96690 | 1772 | |
967e3668 MD |
1773 | rcu_register_thread(); |
1774 | ||
6c71277b | 1775 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 | 1776 | |
9ad42ec1 MD |
1777 | if (testpoint(sessiond_thread_app_reg_dispatch)) { |
1778 | goto error_testpoint; | |
1779 | } | |
1780 | ||
12e2b881 MD |
1781 | health_code_update(); |
1782 | ||
f45e313d | 1783 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1784 | |
1785 | DBG("[thread] Dispatch UST command started"); | |
1786 | ||
0ed3b1a8 | 1787 | for (;;) { |
12e2b881 MD |
1788 | health_code_update(); |
1789 | ||
099e26bd DG |
1790 | /* Atomically prepare the queue futex */ |
1791 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1792 | ||
0ed3b1a8 MD |
1793 | if (CMM_LOAD_SHARED(dispatch_thread_exit)) { |
1794 | break; | |
1795 | } | |
1796 | ||
099e26bd | 1797 | do { |
d0b96690 | 1798 | struct ust_app *app = NULL; |
7972aab2 | 1799 | ust_cmd = NULL; |
d0b96690 | 1800 | |
f45e313d DG |
1801 | /* |
1802 | * Make sure we don't have node(s) that have hung up before receiving | |
1803 | * the notify socket. This is to clean the list in order to avoid | |
1804 | * memory leaks from notify socket that are never seen. | |
1805 | */ | |
1806 | sanitize_wait_queue(&wait_queue); | |
1807 | ||
12e2b881 | 1808 | health_code_update(); |
099e26bd | 1809 | /* Dequeue command for registration */ |
8bdee6e2 | 1810 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 1811 | if (node == NULL) { |
00a17c97 | 1812 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1813 | /* Continue thread execution */ |
1814 | break; | |
1815 | } | |
1816 | ||
1817 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1818 | ||
2f50c8a3 DG |
1819 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1820 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1821 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1822 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1823 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1824 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1825 | |
1826 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1827 | wait_node = zmalloc(sizeof(*wait_node)); | |
1828 | if (!wait_node) { | |
1829 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1830 | ret = close(ust_cmd->sock); |
1831 | if (ret < 0) { | |
1832 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1833 | } | |
51dec90d | 1834 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1835 | free(ust_cmd); |
d0b96690 DG |
1836 | goto error; |
1837 | } | |
1838 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1839 | ||
1840 | /* Create application object if socket is CMD. */ | |
1841 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1842 | ust_cmd->sock); | |
1843 | if (!wait_node->app) { | |
1844 | ret = close(ust_cmd->sock); | |
1845 | if (ret < 0) { | |
1846 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1847 | } |
51dec90d | 1848 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1849 | free(wait_node); |
7972aab2 | 1850 | free(ust_cmd); |
d0b96690 DG |
1851 | continue; |
1852 | } | |
1853 | /* | |
1854 | * Add application to the wait queue so we can set the notify | |
1855 | * socket before putting this object in the global ht. | |
1856 | */ | |
f45e313d DG |
1857 | cds_list_add(&wait_node->head, &wait_queue.head); |
1858 | wait_queue.count++; | |
d0b96690 | 1859 | |
7972aab2 | 1860 | free(ust_cmd); |
d0b96690 DG |
1861 | /* |
1862 | * We have to continue here since we don't have the notify | |
1863 | * socket and the application MUST be added to the hash table | |
1864 | * only at that moment. | |
1865 | */ | |
1866 | continue; | |
1867 | } else { | |
1868 | /* | |
1869 | * Look for the application in the local wait queue and set the | |
1870 | * notify socket if found. | |
1871 | */ | |
d88aee68 | 1872 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1873 | &wait_queue.head, head) { |
12e2b881 | 1874 | health_code_update(); |
d0b96690 DG |
1875 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1876 | wait_node->app->notify_sock = ust_cmd->sock; | |
1877 | cds_list_del(&wait_node->head); | |
f45e313d | 1878 | wait_queue.count--; |
d0b96690 DG |
1879 | app = wait_node->app; |
1880 | free(wait_node); | |
1881 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1882 | break; | |
1883 | } | |
1884 | } | |
020d7f60 DG |
1885 | |
1886 | /* | |
1887 | * With no application at this stage the received socket is | |
1888 | * basically useless so close it before we free the cmd data | |
1889 | * structure for good. | |
1890 | */ | |
1891 | if (!app) { | |
1892 | ret = close(ust_cmd->sock); | |
1893 | if (ret < 0) { | |
1894 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1895 | } | |
51dec90d | 1896 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1897 | } |
7972aab2 | 1898 | free(ust_cmd); |
d0b96690 DG |
1899 | } |
1900 | ||
1901 | if (app) { | |
d0b96690 DG |
1902 | /* |
1903 | * @session_lock_list | |
1904 | * | |
1905 | * Lock the global session list so from the register up to the | |
1906 | * registration done message, no thread can see the application | |
1907 | * and change its state. | |
1908 | */ | |
1909 | session_lock_list(); | |
1910 | rcu_read_lock(); | |
d88aee68 | 1911 | |
d0b96690 DG |
1912 | /* |
1913 | * Add application to the global hash table. This needs to be | |
1914 | * done before the update to the UST registry can locate the | |
1915 | * application. | |
1916 | */ | |
1917 | ust_app_add(app); | |
d88aee68 DG |
1918 | |
1919 | /* Set app version. This call will print an error if needed. */ | |
1920 | (void) ust_app_version(app); | |
1921 | ||
1922 | /* Send notify socket through the notify pipe. */ | |
1923 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1924 | app->notify_sock); | |
1925 | if (ret < 0) { | |
1926 | rcu_read_unlock(); | |
1927 | session_unlock_list(); | |
b85dc84c DG |
1928 | /* |
1929 | * No notify thread, stop the UST tracing. However, this is | |
1930 | * not an internal error of the this thread thus setting | |
1931 | * the health error code to a normal exit. | |
1932 | */ | |
1933 | err = 0; | |
d88aee68 | 1934 | goto error; |
6620da75 | 1935 | } |
d88aee68 | 1936 | |
d0b96690 DG |
1937 | /* |
1938 | * Update newly registered application with the tracing | |
1939 | * registry info already enabled information. | |
1940 | */ | |
1941 | update_ust_app(app->sock); | |
d88aee68 DG |
1942 | |
1943 | /* | |
1944 | * Don't care about return value. Let the manage apps threads | |
1945 | * handle app unregistration upon socket close. | |
1946 | */ | |
fb45065e | 1947 | (void) ust_app_register_done(app); |
d88aee68 DG |
1948 | |
1949 | /* | |
1950 | * Even if the application socket has been closed, send the app | |
1951 | * to the thread and unregistration will take place at that | |
1952 | * place. | |
1953 | */ | |
1954 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1955 | if (ret < 0) { |
d88aee68 DG |
1956 | rcu_read_unlock(); |
1957 | session_unlock_list(); | |
b85dc84c DG |
1958 | /* |
1959 | * No apps. thread, stop the UST tracing. However, this is | |
1960 | * not an internal error of the this thread thus setting | |
1961 | * the health error code to a normal exit. | |
1962 | */ | |
1963 | err = 0; | |
d88aee68 | 1964 | goto error; |
d0b96690 | 1965 | } |
d88aee68 | 1966 | |
d0b96690 DG |
1967 | rcu_read_unlock(); |
1968 | session_unlock_list(); | |
099e26bd | 1969 | } |
099e26bd DG |
1970 | } while (node != NULL); |
1971 | ||
12e2b881 | 1972 | health_poll_entry(); |
099e26bd DG |
1973 | /* Futex wait on queue. Blocking call on futex() */ |
1974 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1975 | health_poll_exit(); |
099e26bd | 1976 | } |
12e2b881 MD |
1977 | /* Normal exit, no error */ |
1978 | err = 0; | |
099e26bd DG |
1979 | |
1980 | error: | |
d88aee68 DG |
1981 | /* Clean up wait queue. */ |
1982 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1983 | &wait_queue.head, head) { |
d88aee68 | 1984 | cds_list_del(&wait_node->head); |
f45e313d | 1985 | wait_queue.count--; |
d88aee68 DG |
1986 | free(wait_node); |
1987 | } | |
1988 | ||
772b8f4d MD |
1989 | /* Empty command queue. */ |
1990 | for (;;) { | |
1991 | /* Dequeue command for registration */ | |
1992 | node = cds_wfcq_dequeue_blocking(&ust_cmd_queue.head, &ust_cmd_queue.tail); | |
1993 | if (node == NULL) { | |
1994 | break; | |
1995 | } | |
1996 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1997 | ret = close(ust_cmd->sock); | |
1998 | if (ret < 0) { | |
1999 | PERROR("close ust sock exit dispatch %d", ust_cmd->sock); | |
2000 | } | |
2001 | lttng_fd_put(LTTNG_FD_APPS, 1); | |
2002 | free(ust_cmd); | |
2003 | } | |
2004 | ||
9ad42ec1 | 2005 | error_testpoint: |
099e26bd | 2006 | DBG("Dispatch thread dying"); |
12e2b881 MD |
2007 | if (err) { |
2008 | health_error(); | |
2009 | ERR("Health error occurred in %s", __func__); | |
2010 | } | |
8782cc74 | 2011 | health_unregister(health_sessiond); |
967e3668 | 2012 | rcu_unregister_thread(); |
099e26bd DG |
2013 | return NULL; |
2014 | } | |
2015 | ||
2016 | /* | |
2017 | * This thread manage application registration. | |
2018 | */ | |
2019 | static void *thread_registration_apps(void *data) | |
1d4b027a | 2020 | { |
139ac872 | 2021 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
2022 | uint32_t revents, nb_fd; |
2023 | struct lttng_poll_event events; | |
099e26bd DG |
2024 | /* |
2025 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
2026 | * freed in the manage apps thread. | |
2027 | */ | |
2028 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 2029 | |
099e26bd | 2030 | DBG("[thread] Manage application registration started"); |
1d4b027a | 2031 | |
6c71277b | 2032 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 2033 | |
e547b070 | 2034 | if (testpoint(sessiond_thread_registration_apps)) { |
6993eeb3 CB |
2035 | goto error_testpoint; |
2036 | } | |
8ac94142 | 2037 | |
1d4b027a DG |
2038 | ret = lttcomm_listen_unix_sock(apps_sock); |
2039 | if (ret < 0) { | |
76d7553f | 2040 | goto error_listen; |
1d4b027a DG |
2041 | } |
2042 | ||
5eb91c98 DG |
2043 | /* |
2044 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
2045 | * more will be added to this poll set. | |
2046 | */ | |
d0b96690 | 2047 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 2048 | if (ret < 0) { |
76d7553f | 2049 | goto error_create_poll; |
5eb91c98 | 2050 | } |
273ea72c | 2051 | |
5eb91c98 DG |
2052 | /* Add the application registration socket */ |
2053 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
2054 | if (ret < 0) { | |
76d7553f | 2055 | goto error_poll_add; |
5eb91c98 | 2056 | } |
273ea72c | 2057 | |
1d4b027a | 2058 | /* Notify all applications to register */ |
0fdd1e2c DG |
2059 | ret = notify_ust_apps(1); |
2060 | if (ret < 0) { | |
2061 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
2062 | "Execution continues but there might be problem for already\n" |
2063 | "running applications that wishes to register."); | |
0fdd1e2c | 2064 | } |
1d4b027a DG |
2065 | |
2066 | while (1) { | |
2067 | DBG("Accepting application registration"); | |
273ea72c DG |
2068 | |
2069 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 2070 | restart: |
a78af745 | 2071 | health_poll_entry(); |
5eb91c98 | 2072 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 2073 | health_poll_exit(); |
273ea72c | 2074 | if (ret < 0) { |
88f2b785 MD |
2075 | /* |
2076 | * Restart interrupted system call. | |
2077 | */ | |
2078 | if (errno == EINTR) { | |
2079 | goto restart; | |
2080 | } | |
273ea72c DG |
2081 | goto error; |
2082 | } | |
2083 | ||
0d9c5d77 DG |
2084 | nb_fd = ret; |
2085 | ||
5eb91c98 | 2086 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 2087 | health_code_update(); |
139ac872 | 2088 | |
5eb91c98 DG |
2089 | /* Fetch once the poll data */ |
2090 | revents = LTTNG_POLL_GETEV(&events, i); | |
2091 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 2092 | |
fd20dac9 MD |
2093 | if (!revents) { |
2094 | /* No activity for this FD (poll implementation). */ | |
2095 | continue; | |
2096 | } | |
2097 | ||
5eb91c98 | 2098 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 2099 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 2100 | if (ret) { |
139ac872 MD |
2101 | err = 0; |
2102 | goto exit; | |
90014c57 | 2103 | } |
1d4b027a | 2104 | |
5eb91c98 DG |
2105 | /* Event on the registration socket */ |
2106 | if (pollfd == apps_sock) { | |
03e43155 | 2107 | if (revents & LPOLLIN) { |
5eb91c98 DG |
2108 | sock = lttcomm_accept_unix_sock(apps_sock); |
2109 | if (sock < 0) { | |
2110 | goto error; | |
2111 | } | |
099e26bd | 2112 | |
16c5c8fa DG |
2113 | /* |
2114 | * Set socket timeout for both receiving and ending. | |
2115 | * app_socket_timeout is in seconds, whereas | |
2116 | * lttcomm_setsockopt_rcv_timeout and | |
2117 | * lttcomm_setsockopt_snd_timeout expect msec as | |
2118 | * parameter. | |
2119 | */ | |
e6142f2e | 2120 | if (config.app_socket_timeout >= 0) { |
28ce0ff2 | 2121 | (void) lttcomm_setsockopt_rcv_timeout(sock, |
e6142f2e | 2122 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2123 | (void) lttcomm_setsockopt_snd_timeout(sock, |
e6142f2e | 2124 | config.app_socket_timeout * 1000); |
28ce0ff2 | 2125 | } |
16c5c8fa | 2126 | |
b662582b DG |
2127 | /* |
2128 | * Set the CLOEXEC flag. Return code is useless because | |
2129 | * either way, the show must go on. | |
2130 | */ | |
2131 | (void) utils_set_fd_cloexec(sock); | |
2132 | ||
5eb91c98 | 2133 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 2134 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 2135 | if (ust_cmd == NULL) { |
76d7553f | 2136 | PERROR("ust command zmalloc"); |
41ed8e47 MD |
2137 | ret = close(sock); |
2138 | if (ret) { | |
2139 | PERROR("close"); | |
2140 | } | |
5eb91c98 DG |
2141 | goto error; |
2142 | } | |
1d4b027a | 2143 | |
5eb91c98 DG |
2144 | /* |
2145 | * Using message-based transmissions to ensure we don't | |
2146 | * have to deal with partially received messages. | |
2147 | */ | |
4063050c MD |
2148 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
2149 | if (ret < 0) { | |
2150 | ERR("Exhausted file descriptors allowed for applications."); | |
2151 | free(ust_cmd); | |
2152 | ret = close(sock); | |
2153 | if (ret) { | |
2154 | PERROR("close"); | |
2155 | } | |
2156 | sock = -1; | |
2157 | continue; | |
2158 | } | |
d88aee68 | 2159 | |
840cb59c | 2160 | health_code_update(); |
d0b96690 DG |
2161 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
2162 | if (ret < 0) { | |
5eb91c98 | 2163 | free(ust_cmd); |
d0b96690 | 2164 | /* Close socket of the application. */ |
76d7553f MD |
2165 | ret = close(sock); |
2166 | if (ret) { | |
2167 | PERROR("close"); | |
2168 | } | |
4063050c | 2169 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 2170 | sock = -1; |
5eb91c98 DG |
2171 | continue; |
2172 | } | |
840cb59c | 2173 | health_code_update(); |
099e26bd | 2174 | |
5eb91c98 | 2175 | ust_cmd->sock = sock; |
34a2494f | 2176 | sock = -1; |
099e26bd | 2177 | |
5eb91c98 DG |
2178 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
2179 | " gid:%d sock:%d name:%s (version %d.%d)", | |
2180 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
2181 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
2182 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
2183 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 2184 | |
5eb91c98 DG |
2185 | /* |
2186 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 2187 | * has been taken! This apps will be part of the *system*. |
5eb91c98 | 2188 | */ |
8bdee6e2 | 2189 | cds_wfcq_enqueue(&ust_cmd_queue.head, &ust_cmd_queue.tail, &ust_cmd->node); |
5eb91c98 DG |
2190 | |
2191 | /* | |
2192 | * Wake the registration queue futex. Implicit memory | |
8bdee6e2 | 2193 | * barrier with the exchange in cds_wfcq_enqueue. |
5eb91c98 DG |
2194 | */ |
2195 | futex_nto1_wake(&ust_cmd_queue.futex); | |
03e43155 MD |
2196 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
2197 | ERR("Register apps socket poll error"); | |
2198 | goto error; | |
2199 | } else { | |
2200 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
2201 | goto error; | |
5eb91c98 DG |
2202 | } |
2203 | } | |
90014c57 | 2204 | } |
1d4b027a DG |
2205 | } |
2206 | ||
139ac872 | 2207 | exit: |
1d4b027a | 2208 | error: |
0fdd1e2c DG |
2209 | /* Notify that the registration thread is gone */ |
2210 | notify_ust_apps(0); | |
2211 | ||
a4b35e07 | 2212 | if (apps_sock >= 0) { |
76d7553f MD |
2213 | ret = close(apps_sock); |
2214 | if (ret) { | |
2215 | PERROR("close"); | |
2216 | } | |
a4b35e07 | 2217 | } |
46c3f085 | 2218 | if (sock >= 0) { |
76d7553f MD |
2219 | ret = close(sock); |
2220 | if (ret) { | |
2221 | PERROR("close"); | |
2222 | } | |
4063050c | 2223 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 2224 | } |
e6142f2e | 2225 | unlink(config.apps_unix_sock_path.value); |
0fdd1e2c | 2226 | |
76d7553f | 2227 | error_poll_add: |
5eb91c98 | 2228 | lttng_poll_clean(&events); |
76d7553f MD |
2229 | error_listen: |
2230 | error_create_poll: | |
6993eeb3 | 2231 | error_testpoint: |
76d7553f | 2232 | DBG("UST Registration thread cleanup complete"); |
9ad42ec1 MD |
2233 | if (err) { |
2234 | health_error(); | |
2235 | ERR("Health error occurred in %s", __func__); | |
2236 | } | |
8782cc74 | 2237 | health_unregister(health_sessiond); |
5eb91c98 | 2238 | |
1d4b027a DG |
2239 | return NULL; |
2240 | } | |
2241 | ||
8c0faa1d | 2242 | /* |
3bd1e081 | 2243 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 2244 | * exec or it will fails. |
8c0faa1d | 2245 | */ |
3bd1e081 | 2246 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 2247 | { |
a23ec3a7 | 2248 | int ret, clock_ret; |
ee0b0061 DG |
2249 | struct timespec timeout; |
2250 | ||
13a7bce3 JG |
2251 | /* |
2252 | * Make sure we set the readiness flag to 0 because we are NOT ready. | |
2253 | * This access to consumer_thread_is_ready does not need to be | |
2254 | * protected by consumer_data.cond_mutex (yet) since the consumer | |
2255 | * management thread has not been started at this point. | |
2256 | */ | |
a23ec3a7 | 2257 | consumer_data->consumer_thread_is_ready = 0; |
8c0faa1d | 2258 | |
a23ec3a7 DG |
2259 | /* Setup pthread condition */ |
2260 | ret = pthread_condattr_init(&consumer_data->condattr); | |
4a15001e | 2261 | if (ret) { |
a23ec3a7 DG |
2262 | errno = ret; |
2263 | PERROR("pthread_condattr_init consumer data"); | |
2264 | goto error; | |
2265 | } | |
2266 | ||
2267 | /* | |
2268 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
2269 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
2270 | * for a more details and how we noticed it. | |
2271 | */ | |
2272 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
4a15001e | 2273 | if (ret) { |
a23ec3a7 DG |
2274 | errno = ret; |
2275 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
2276 | goto error; |
2277 | } | |
8c0faa1d | 2278 | |
a23ec3a7 | 2279 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
4a15001e | 2280 | if (ret) { |
a23ec3a7 DG |
2281 | errno = ret; |
2282 | PERROR("pthread_cond_init consumer data"); | |
2283 | goto error; | |
2284 | } | |
2285 | ||
1a1a34b4 MJ |
2286 | ret = pthread_create(&consumer_data->thread, default_pthread_attr(), |
2287 | thread_manage_consumer, consumer_data); | |
4a15001e MD |
2288 | if (ret) { |
2289 | errno = ret; | |
3bd1e081 | 2290 | PERROR("pthread_create consumer"); |
ee0b0061 | 2291 | ret = -1; |
8c0faa1d DG |
2292 | goto error; |
2293 | } | |
2294 | ||
a23ec3a7 DG |
2295 | /* We are about to wait on a pthread condition */ |
2296 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2297 | ||
ee0b0061 | 2298 | /* Get time for sem_timedwait absolute timeout */ |
389fbf04 | 2299 | clock_ret = lttng_clock_gettime(CLOCK_MONOTONIC, &timeout); |
a23ec3a7 DG |
2300 | /* |
2301 | * Set the timeout for the condition timed wait even if the clock gettime | |
2302 | * call fails since we might loop on that call and we want to avoid to | |
2303 | * increment the timeout too many times. | |
2304 | */ | |
2305 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2306 | ||
2307 | /* | |
2308 | * The following loop COULD be skipped in some conditions so this is why we | |
2309 | * set ret to 0 in order to make sure at least one round of the loop is | |
2310 | * done. | |
2311 | */ | |
2312 | ret = 0; | |
2313 | ||
2314 | /* | |
2315 | * Loop until the condition is reached or when a timeout is reached. Note | |
2316 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2317 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2318 | * possible. This loop does not take any chances and works with both of | |
2319 | * them. | |
2320 | */ | |
2321 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2322 | if (clock_ret < 0) { | |
2323 | PERROR("clock_gettime spawn consumer"); | |
2324 | /* Infinite wait for the consumerd thread to be ready */ | |
2325 | ret = pthread_cond_wait(&consumer_data->cond, | |
2326 | &consumer_data->cond_mutex); | |
2327 | } else { | |
2328 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2329 | &consumer_data->cond_mutex, &timeout); | |
2330 | } | |
ee0b0061 | 2331 | } |
8c0faa1d | 2332 | |
a23ec3a7 DG |
2333 | /* Release the pthread condition */ |
2334 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2335 | ||
2336 | if (ret != 0) { | |
2337 | errno = ret; | |
2338 | if (ret == ETIMEDOUT) { | |
4282f9a3 DG |
2339 | int pth_ret; |
2340 | ||
ee0b0061 DG |
2341 | /* |
2342 | * Call has timed out so we kill the kconsumerd_thread and return | |
2343 | * an error. | |
2344 | */ | |
a23ec3a7 DG |
2345 | ERR("Condition timed out. The consumer thread was never ready." |
2346 | " Killing it"); | |
4282f9a3 DG |
2347 | pth_ret = pthread_cancel(consumer_data->thread); |
2348 | if (pth_ret < 0) { | |
3bd1e081 | 2349 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2350 | } |
2351 | } else { | |
a23ec3a7 | 2352 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 | 2353 | } |
4282f9a3 DG |
2354 | /* Caller is expecting a negative value on failure. */ |
2355 | ret = -1; | |
ee0b0061 DG |
2356 | goto error; |
2357 | } | |
2358 | ||
3bd1e081 MD |
2359 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2360 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2361 | ERR("Consumerd did not start"); |
3bd1e081 | 2362 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2363 | goto error; |
2364 | } | |
3bd1e081 | 2365 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2366 | |
8c0faa1d DG |
2367 | return 0; |
2368 | ||
2369 | error: | |
2370 | return ret; | |
2371 | } | |
2372 | ||
d9800920 | 2373 | /* |
3bd1e081 | 2374 | * Join consumer thread |
d9800920 | 2375 | */ |
3bd1e081 | 2376 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2377 | { |
2378 | void *status; | |
cf3af59e | 2379 | |
e8209f6b DG |
2380 | /* Consumer pid must be a real one. */ |
2381 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2382 | int ret; |
3bd1e081 | 2383 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2384 | if (ret) { |
4a15001e | 2385 | PERROR("Error killing consumer daemon"); |
cf3af59e MD |
2386 | return ret; |
2387 | } | |
3bd1e081 | 2388 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2389 | } else { |
2390 | return 0; | |
2391 | } | |
2392 | } | |
2393 | ||
8c0faa1d | 2394 | /* |
3bd1e081 | 2395 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2396 | * |
d063d709 | 2397 | * Return pid if successful else -1. |
8c0faa1d | 2398 | */ |
3bd1e081 | 2399 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2400 | { |
2401 | int ret; | |
2402 | pid_t pid; | |
94c55f17 | 2403 | const char *consumer_to_use; |
53086306 | 2404 | const char *verbosity; |
94c55f17 | 2405 | struct stat st; |
8c0faa1d | 2406 | |
3bd1e081 | 2407 | DBG("Spawning consumerd"); |
c49dc785 | 2408 | |
8c0faa1d DG |
2409 | pid = fork(); |
2410 | if (pid == 0) { | |
2411 | /* | |
3bd1e081 | 2412 | * Exec consumerd. |
8c0faa1d | 2413 | */ |
e6142f2e | 2414 | if (config.verbose_consumer) { |
53086306 | 2415 | verbosity = "--verbose"; |
4421f712 | 2416 | } else if (lttng_opt_quiet) { |
53086306 | 2417 | verbosity = "--quiet"; |
4421f712 DG |
2418 | } else { |
2419 | verbosity = ""; | |
53086306 | 2420 | } |
4421f712 | 2421 | |
3bd1e081 MD |
2422 | switch (consumer_data->type) { |
2423 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2424 | /* |
c7704d57 DG |
2425 | * Find out which consumerd to execute. We will first try the |
2426 | * 64-bit path, then the sessiond's installation directory, and | |
2427 | * fallback on the 32-bit one, | |
94c55f17 | 2428 | */ |
63a799e8 | 2429 | DBG3("Looking for a kernel consumer at these locations:"); |
59ee5091 | 2430 | DBG3(" 1) %s", config.consumerd64_bin_path.value ? : "NULL"); |
e6142f2e | 2431 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, DEFAULT_CONSUMERD_FILE); |
59ee5091 | 2432 | DBG3(" 3) %s", config.consumerd32_bin_path.value ? : "NULL"); |
e6142f2e | 2433 | if (stat(config.consumerd64_bin_path.value, &st) == 0) { |
63a799e8 | 2434 | DBG3("Found location #1"); |
e6142f2e JG |
2435 | consumer_to_use = config.consumerd64_bin_path.value; |
2436 | } else if (stat(INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE, &st) == 0) { | |
63a799e8 | 2437 | DBG3("Found location #2"); |
e6142f2e JG |
2438 | consumer_to_use = INSTALL_BIN_PATH "/" DEFAULT_CONSUMERD_FILE; |
2439 | } else if (stat(config.consumerd32_bin_path.value, &st) == 0) { | |
63a799e8 | 2440 | DBG3("Found location #3"); |
e6142f2e | 2441 | consumer_to_use = config.consumerd32_bin_path.value; |
94c55f17 | 2442 | } else { |
63a799e8 | 2443 | DBG("Could not find any valid consumerd executable"); |
4282f9a3 | 2444 | ret = -EINVAL; |
3d678709 | 2445 | goto error; |
94c55f17 AM |
2446 | } |
2447 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
6e2cc8d8 | 2448 | (void) execl(consumer_to_use, |
94c55f17 AM |
2449 | "lttng-consumerd", verbosity, "-k", |
2450 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2451 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2452 | "--group", config.tracing_group_name.value, |
94c55f17 | 2453 | NULL); |
3bd1e081 | 2454 | break; |
7753dea8 MD |
2455 | case LTTNG_CONSUMER64_UST: |
2456 | { | |
46b23495 | 2457 | if (config.consumerd64_lib_dir.value) { |
8f4905da MD |
2458 | char *tmp; |
2459 | size_t tmplen; | |
ddaec4a2 | 2460 | char *tmpnew; |
8f4905da | 2461 | |
e8fa9fb0 | 2462 | tmp = lttng_secure_getenv("LD_LIBRARY_PATH"); |
8f4905da MD |
2463 | if (!tmp) { |
2464 | tmp = ""; | |
2465 | } | |
d222983e | 2466 | tmplen = strlen(config.consumerd64_lib_dir.value) + 1 /* : */ + strlen(tmp); |
8f4905da MD |
2467 | tmpnew = zmalloc(tmplen + 1 /* \0 */); |
2468 | if (!tmpnew) { | |
2469 | ret = -ENOMEM; | |
2470 | goto error; | |
2471 | } | |
e6142f2e | 2472 | strcat(tmpnew, config.consumerd64_lib_dir.value); |
8f4905da MD |
2473 | if (tmp[0] != '\0') { |
2474 | strcat(tmpnew, ":"); | |
2475 | strcat(tmpnew, tmp); | |
2476 | } | |
d222983e | 2477 | ret = setenv("LD_LIBRARY_PATH", tmpnew, 1); |
ddaec4a2 | 2478 | free(tmpnew); |
8f4905da MD |
2479 | if (ret) { |
2480 | ret = -errno; | |
2481 | goto error; | |
2482 | } | |
2483 | } | |
e6142f2e JG |
2484 | DBG("Using 64-bit UST consumer at: %s", config.consumerd64_bin_path.value); |
2485 | (void) execl(config.consumerd64_bin_path.value, "lttng-consumerd", verbosity, "-u", | |
7753dea8 MD |
2486 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2487 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
e6142f2e | 2488 | "--group", config.tracing_group_name.value, |
7753dea8 | 2489 | NULL); |
3bd1e081 | 2490 | break; |
7753dea8 MD |
2491 | } |
2492 | case LTTNG_CONSUMER32_UST: | |
2493 | { | |
46b23495 | 2494 | if (config.consumerd32_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.consumerd32_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.consumerd32_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 32-bit UST consumer at: %s", config.consumerd32_bin_path.value); |
2522 | (void) execl(config.consumerd32_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 MD |
2526 | NULL); |
2527 | break; | |
2528 | } | |
3bd1e081 | 2529 | default: |
b60e7183 | 2530 | ERR("unknown consumer type"); |
e9d6b496 | 2531 | errno = 0; |
3bd1e081 | 2532 | } |
8c0faa1d | 2533 | if (errno != 0) { |
4282f9a3 | 2534 | PERROR("Consumer execl()"); |
8c0faa1d | 2535 | } |
4282f9a3 | 2536 | /* Reaching this point, we got a failure on our execl(). */ |
8c0faa1d DG |
2537 | exit(EXIT_FAILURE); |
2538 | } else if (pid > 0) { | |
2539 | ret = pid; | |
8c0faa1d | 2540 | } else { |
76d7553f | 2541 | PERROR("start consumer fork"); |
8c0faa1d | 2542 | ret = -errno; |
8c0faa1d | 2543 | } |
8f4905da | 2544 | error: |
8c0faa1d DG |
2545 | return ret; |
2546 | } | |
2547 | ||
693bd40b | 2548 | /* |
3bd1e081 | 2549 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2550 | */ |
3bd1e081 | 2551 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2552 | { |
c617c0c6 | 2553 | int ret; |
edb8b045 DG |
2554 | |
2555 | /* | |
2556 | * Set the listen() state on the socket since there is a possible race | |
2557 | * between the exec() of the consumer daemon and this call if place in the | |
2558 | * consumer thread. See bug #366 for more details. | |
2559 | */ | |
2560 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2561 | if (ret < 0) { | |
2562 | goto error; | |
2563 | } | |
693bd40b | 2564 | |
3bd1e081 MD |
2565 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2566 | if (consumer_data->pid != 0) { | |
2567 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2568 | goto end; |
2569 | } | |
693bd40b | 2570 | |
3bd1e081 | 2571 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2572 | if (ret < 0) { |
3bd1e081 MD |
2573 | ERR("Spawning consumerd failed"); |
2574 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2575 | goto error; |
693bd40b | 2576 | } |
c49dc785 | 2577 | |
3bd1e081 MD |
2578 | /* Setting up the consumer_data pid */ |
2579 | consumer_data->pid = ret; | |
48842b30 | 2580 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2581 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2582 | |
3bd1e081 MD |
2583 | DBG2("Spawning consumer control thread"); |
2584 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2585 | if (ret < 0) { |
3bd1e081 | 2586 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2587 | goto error; |
2588 | } | |
2589 | ||
c49dc785 | 2590 | end: |
693bd40b DG |
2591 | return 0; |
2592 | ||
2593 | error: | |
331744e3 | 2594 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2595 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2596 | int err; |
2597 | ||
edb8b045 DG |
2598 | err = close(consumer_data->err_sock); |
2599 | if (err < 0) { | |
2600 | PERROR("close consumer data error socket"); | |
2601 | } | |
2602 | } | |
693bd40b DG |
2603 | return ret; |
2604 | } | |
2605 | ||
b73401da | 2606 | /* |
096102bd | 2607 | * Setup necessary data for kernel tracer action. |
b73401da | 2608 | */ |
096102bd | 2609 | static int init_kernel_tracer(void) |
b73401da DG |
2610 | { |
2611 | int ret; | |
b73401da | 2612 | |
096102bd DG |
2613 | /* Modprobe lttng kernel modules */ |
2614 | ret = modprobe_lttng_control(); | |
b73401da | 2615 | if (ret < 0) { |
b73401da DG |
2616 | goto error; |
2617 | } | |
2618 | ||
096102bd DG |
2619 | /* Open debugfs lttng */ |
2620 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2621 | if (kernel_tracer_fd < 0) { | |
2622 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b | 2623 | goto error_open; |
54d01ffb DG |
2624 | } |
2625 | ||
2f77fc4b | 2626 | /* Validate kernel version */ |
88076e89 JD |
2627 | ret = kernel_validate_version(kernel_tracer_fd, &kernel_tracer_version, |
2628 | &kernel_tracer_abi_version); | |
2f77fc4b DG |
2629 | if (ret < 0) { |
2630 | goto error_version; | |
b551a063 | 2631 | } |
54d01ffb | 2632 | |
2f77fc4b DG |
2633 | ret = modprobe_lttng_data(); |
2634 | if (ret < 0) { | |
2635 | goto error_modules; | |
54d01ffb DG |
2636 | } |
2637 | ||
6e21424e JR |
2638 | ret = kernel_supports_ring_buffer_snapshot_sample_positions( |
2639 | kernel_tracer_fd); | |
2640 | if (ret < 0) { | |
2641 | goto error_modules; | |
2642 | } | |
2643 | ||
2644 | if (ret < 1) { | |
2645 | WARN("Kernel tracer does not support buffer monitoring. " | |
2646 | "The monitoring timer of channels in the kernel domain " | |
2647 | "will be set to 0 (disabled)."); | |
2648 | } | |
2649 | ||
2f77fc4b DG |
2650 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2651 | return 0; | |
2652 | ||
2653 | error_version: | |
2654 | modprobe_remove_lttng_control(); | |
2655 | ret = close(kernel_tracer_fd); | |
2656 | if (ret) { | |
2657 | PERROR("close"); | |
b551a063 | 2658 | } |
2f77fc4b | 2659 | kernel_tracer_fd = -1; |
f73fabfd | 2660 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2661 | |
2f77fc4b DG |
2662 | error_modules: |
2663 | ret = close(kernel_tracer_fd); | |
2664 | if (ret) { | |
2665 | PERROR("close"); | |
b551a063 | 2666 | } |
54d01ffb | 2667 | |
2f77fc4b DG |
2668 | error_open: |
2669 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2670 | |
2671 | error: | |
2f77fc4b DG |
2672 | WARN("No kernel tracer available"); |
2673 | kernel_tracer_fd = -1; | |
2674 | if (!is_root) { | |
f73fabfd | 2675 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2676 | } else { |
f73fabfd | 2677 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2678 | } |
54d01ffb DG |
2679 | } |
2680 | ||
2f77fc4b | 2681 | |
54d01ffb | 2682 | /* |
2f77fc4b DG |
2683 | * Copy consumer output from the tracing session to the domain session. The |
2684 | * function also applies the right modification on a per domain basis for the | |
2685 | * trace files destination directory. | |
36b588ed MD |
2686 | * |
2687 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2688 | */ |
2f77fc4b | 2689 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2690 | { |
2691 | int ret; | |
2f77fc4b DG |
2692 | const char *dir_name; |
2693 | struct consumer_output *consumer; | |
2694 | ||
2695 | assert(session); | |
2696 | assert(session->consumer); | |
54d01ffb | 2697 | |
b551a063 DG |
2698 | switch (domain) { |
2699 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2700 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2701 | /* |
2702 | * XXX: We should audit the session creation and what this function | |
2703 | * does "extra" in order to avoid a destroy since this function is used | |
2704 | * in the domain session creation (kernel and ust) only. Same for UST | |
2705 | * domain. | |
2706 | */ | |
2707 | if (session->kernel_session->consumer) { | |
6addfa37 | 2708 | consumer_output_put(session->kernel_session->consumer); |
09a90bcd | 2709 | } |
2f77fc4b DG |
2710 | session->kernel_session->consumer = |
2711 | consumer_copy_output(session->consumer); | |
2712 | /* Ease our life a bit for the next part */ | |
2713 | consumer = session->kernel_session->consumer; | |
2714 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2715 | break; |
f20baf8e | 2716 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2717 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2718 | case LTTNG_DOMAIN_PYTHON: |
b551a063 | 2719 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2720 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd | 2721 | if (session->ust_session->consumer) { |
6addfa37 | 2722 | consumer_output_put(session->ust_session->consumer); |
09a90bcd | 2723 | } |
2f77fc4b DG |
2724 | session->ust_session->consumer = |
2725 | consumer_copy_output(session->consumer); | |
2726 | /* Ease our life a bit for the next part */ | |
2727 | consumer = session->ust_session->consumer; | |
2728 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2729 | break; |
2730 | default: | |
f73fabfd | 2731 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2732 | goto error; |
2733 | } | |
2734 | ||
2f77fc4b | 2735 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2736 | strncat(consumer->subdir, dir_name, |
2737 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2738 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2739 | ||
f73fabfd | 2740 | ret = LTTNG_OK; |
54d01ffb DG |
2741 | |
2742 | error: | |
2743 | return ret; | |
2744 | } | |
2745 | ||
00e2e675 | 2746 | /* |
2f77fc4b | 2747 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2748 | * |
2749 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2750 | */ |
2f77fc4b DG |
2751 | static int create_ust_session(struct ltt_session *session, |
2752 | struct lttng_domain *domain) | |
00e2e675 DG |
2753 | { |
2754 | int ret; | |
2f77fc4b | 2755 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2756 | |
a4b92340 | 2757 | assert(session); |
2f77fc4b DG |
2758 | assert(domain); |
2759 | assert(session->consumer); | |
a4b92340 | 2760 | |
2f77fc4b | 2761 | switch (domain->type) { |
f20baf8e | 2762 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 2763 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 2764 | case LTTNG_DOMAIN_PYTHON: |
2f77fc4b DG |
2765 | case LTTNG_DOMAIN_UST: |
2766 | break; | |
2767 | default: | |
2768 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2769 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2770 | goto error; |
2771 | } | |
2772 | ||
2f77fc4b DG |
2773 | DBG("Creating UST session"); |
2774 | ||
dec56f6c | 2775 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2776 | if (lus == NULL) { |
f73fabfd | 2777 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2778 | goto error; |
2779 | } | |
2780 | ||
2f77fc4b DG |
2781 | lus->uid = session->uid; |
2782 | lus->gid = session->gid; | |
2bba9e53 | 2783 | lus->output_traces = session->output_traces; |
27babd3a | 2784 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2785 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2786 | session->ust_session = lus; |
d7ba1388 | 2787 | if (session->shm_path[0]) { |
3d071855 MD |
2788 | strncpy(lus->root_shm_path, session->shm_path, |
2789 | sizeof(lus->root_shm_path)); | |
2790 | lus->root_shm_path[sizeof(lus->root_shm_path) - 1] = '\0'; | |
d7ba1388 MD |
2791 | strncpy(lus->shm_path, session->shm_path, |
2792 | sizeof(lus->shm_path)); | |
2793 | lus->shm_path[sizeof(lus->shm_path) - 1] = '\0'; | |
2794 | strncat(lus->shm_path, "/ust", | |
2795 | sizeof(lus->shm_path) - strlen(lus->shm_path) - 1); | |
2796 | } | |
2f77fc4b DG |
2797 | /* Copy session output to the newly created UST session */ |
2798 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2799 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2800 | goto error; |
2801 | } | |
2802 | ||
f73fabfd | 2803 | return LTTNG_OK; |
00e2e675 DG |
2804 | |
2805 | error: | |
2f77fc4b DG |
2806 | free(lus); |
2807 | session->ust_session = NULL; | |
00e2e675 DG |
2808 | return ret; |
2809 | } | |
2810 | ||
2811 | /* | |
2f77fc4b | 2812 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2813 | */ |
2f77fc4b | 2814 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2815 | { |
2816 | int ret; | |
a4b92340 | 2817 | |
2f77fc4b | 2818 | DBG("Creating kernel session"); |
00e2e675 | 2819 | |
2f77fc4b DG |
2820 | ret = kernel_create_session(session, kernel_tracer_fd); |
2821 | if (ret < 0) { | |
f73fabfd | 2822 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2823 | goto error; |
2824 | } | |
2825 | ||
2f77fc4b DG |
2826 | /* Code flow safety */ |
2827 | assert(session->kernel_session); | |
2828 | ||
2829 | /* Copy session output to the newly created Kernel session */ | |
2830 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2831 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2832 | goto error; |
2833 | } | |
2834 | ||
2f77fc4b DG |
2835 | session->kernel_session->uid = session->uid; |
2836 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2837 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2838 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2839 | |
f73fabfd | 2840 | return LTTNG_OK; |
00e2e675 | 2841 | |
2f77fc4b DG |
2842 | error: |
2843 | trace_kernel_destroy_session(session->kernel_session); | |
2844 | session->kernel_session = NULL; | |
2845 | return ret; | |
2846 | } | |
00e2e675 | 2847 | |
2f77fc4b DG |
2848 | /* |
2849 | * Count number of session permitted by uid/gid. | |
2850 | */ | |
2851 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2852 | { | |
2853 | unsigned int i = 0; | |
2854 | struct ltt_session *session; | |
07424f16 | 2855 | |
2f77fc4b DG |
2856 | DBG("Counting number of available session for UID %d GID %d", |
2857 | uid, gid); | |
2858 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2859 | /* |
2f77fc4b | 2860 | * Only list the sessions the user can control. |
00e2e675 | 2861 | */ |
2f77fc4b DG |
2862 | if (!session_access_ok(session, uid, gid)) { |
2863 | continue; | |
2864 | } | |
2865 | i++; | |
a4b92340 | 2866 | } |
2f77fc4b | 2867 | return i; |
00e2e675 DG |
2868 | } |
2869 | ||
54d01ffb DG |
2870 | /* |
2871 | * Process the command requested by the lttng client within the command | |
2872 | * context structure. This function make sure that the return structure (llm) | |
2873 | * is set and ready for transmission before returning. | |
2874 | * | |
2875 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2876 | * |
2877 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2878 | * |
2879 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2880 | */ |
53a80697 MD |
2881 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2882 | int *sock_error) | |
54d01ffb | 2883 | { |
f73fabfd | 2884 | int ret = LTTNG_OK; |
44d3bd01 | 2885 | int need_tracing_session = 1; |
2e09ba09 | 2886 | int need_domain; |
54d01ffb DG |
2887 | |
2888 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2889 | ||
3745d315 MD |
2890 | assert(!rcu_read_ongoing()); |
2891 | ||
53a80697 MD |
2892 | *sock_error = 0; |
2893 | ||
2e09ba09 MD |
2894 | switch (cmd_ctx->lsm->cmd_type) { |
2895 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2896 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2897 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2898 | case LTTNG_DESTROY_SESSION: |
2899 | case LTTNG_LIST_SESSIONS: | |
2900 | case LTTNG_LIST_DOMAINS: | |
2901 | case LTTNG_START_TRACE: | |
2902 | case LTTNG_STOP_TRACE: | |
6d805429 | 2903 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2904 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2905 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2906 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2907 | case LTTNG_SNAPSHOT_RECORD: | |
fb198a11 | 2908 | case LTTNG_SAVE_SESSION: |
d7ba1388 | 2909 | case LTTNG_SET_SESSION_SHM_PATH: |
eded6438 | 2910 | case LTTNG_REGENERATE_METADATA: |
c2561365 | 2911 | case LTTNG_REGENERATE_STATEDUMP: |
b3530820 JG |
2912 | case LTTNG_REGISTER_TRIGGER: |
2913 | case LTTNG_UNREGISTER_TRIGGER: | |
2e09ba09 | 2914 | need_domain = 0; |
3aace903 | 2915 | break; |
2e09ba09 MD |
2916 | default: |
2917 | need_domain = 1; | |
2918 | } | |
2919 | ||
e6142f2e | 2920 | if (config.no_kernel && need_domain |
2e09ba09 | 2921 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { |
531d29f9 | 2922 | if (!is_root) { |
f73fabfd | 2923 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2924 | } else { |
f73fabfd | 2925 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2926 | } |
4fba7219 DG |
2927 | goto error; |
2928 | } | |
2929 | ||
8d3113b2 DG |
2930 | /* Deny register consumer if we already have a spawned consumer. */ |
2931 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2932 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2933 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2934 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2935 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2936 | goto error; |
2937 | } | |
2938 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2939 | } | |
2940 | ||
54d01ffb DG |
2941 | /* |
2942 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2943 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2944 | * command. |
2945 | */ | |
2946 | switch(cmd_ctx->lsm->cmd_type) { | |
2947 | case LTTNG_LIST_SESSIONS: | |
2948 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2949 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2950 | case LTTNG_LIST_DOMAINS: |
2951 | case LTTNG_LIST_CHANNELS: | |
2952 | case LTTNG_LIST_EVENTS: | |
834978fd | 2953 | case LTTNG_LIST_SYSCALLS: |
a5dfbb9d | 2954 | case LTTNG_LIST_TRACKER_PIDS: |
5cd0780d | 2955 | case LTTNG_DATA_PENDING: |
54d01ffb DG |
2956 | break; |
2957 | default: | |
2958 | /* Setup lttng message with no payload */ | |
6e10c9b9 | 2959 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0); |
54d01ffb DG |
2960 | if (ret < 0) { |
2961 | /* This label does not try to unlock the session */ | |
2962 | goto init_setup_error; | |
2963 | } | |
2964 | } | |
2965 | ||
2966 | /* Commands that DO NOT need a session. */ | |
2967 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2968 | case LTTNG_CREATE_SESSION: |
27babd3a | 2969 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2970 | case LTTNG_CREATE_SESSION_LIVE: |
54d01ffb DG |
2971 | case LTTNG_LIST_SESSIONS: |
2972 | case LTTNG_LIST_TRACEPOINTS: | |
834978fd | 2973 | case LTTNG_LIST_SYSCALLS: |
f37d259d | 2974 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
fb198a11 | 2975 | case LTTNG_SAVE_SESSION: |
b3530820 JG |
2976 | case LTTNG_REGISTER_TRIGGER: |
2977 | case LTTNG_UNREGISTER_TRIGGER: | |
44d3bd01 | 2978 | need_tracing_session = 0; |
54d01ffb DG |
2979 | break; |
2980 | default: | |
2981 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2982 | /* |
2983 | * We keep the session list lock across _all_ commands | |
2984 | * for now, because the per-session lock does not | |
2985 | * handle teardown properly. | |
2986 | */ | |
74babd95 | 2987 | session_lock_list(); |
54d01ffb DG |
2988 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2989 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2990 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2991 | goto error; |
2992 | } else { | |
2993 | /* Acquire lock for the session */ | |
2994 | session_lock(cmd_ctx->session); | |
2995 | } | |
2996 | break; | |
2997 | } | |
b389abbe | 2998 | |
5f3ecf22 DG |
2999 | /* |
3000 | * Commands that need a valid session but should NOT create one if none | |
3001 | * exists. Instead of creating one and destroying it when the command is | |
3002 | * handled, process that right before so we save some round trip in useless | |
3003 | * code path. | |
3004 | */ | |
3005 | switch (cmd_ctx->lsm->cmd_type) { | |
3006 | case LTTNG_DISABLE_CHANNEL: | |
3007 | case LTTNG_DISABLE_EVENT: | |
5f3ecf22 DG |
3008 | switch (cmd_ctx->lsm->domain.type) { |
3009 | case LTTNG_DOMAIN_KERNEL: | |
3010 | if (!cmd_ctx->session->kernel_session) { | |
3011 | ret = LTTNG_ERR_NO_CHANNEL; | |
3012 | goto error; | |
3013 | } | |
3014 | break; | |
3015 | case LTTNG_DOMAIN_JUL: | |
5cdb6027 | 3016 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3017 | case LTTNG_DOMAIN_PYTHON: |
5f3ecf22 DG |
3018 | case LTTNG_DOMAIN_UST: |
3019 | if (!cmd_ctx->session->ust_session) { | |
3020 | ret = LTTNG_ERR_NO_CHANNEL; | |
3021 | goto error; | |
3022 | } | |
3023 | break; | |
3024 | default: | |
3025 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3026 | goto error; | |
3027 | } | |
3028 | default: | |
3029 | break; | |
3030 | } | |
3031 | ||
2e09ba09 MD |
3032 | if (!need_domain) { |
3033 | goto skip_domain; | |
3034 | } | |
a4b92340 | 3035 | |
54d01ffb DG |
3036 | /* |
3037 | * Check domain type for specific "pre-action". | |
3038 | */ | |
3039 | switch (cmd_ctx->lsm->domain.type) { | |
3040 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 3041 | if (!is_root) { |
f73fabfd | 3042 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
3043 | goto error; |
3044 | } | |
3045 | ||
54d01ffb | 3046 | /* Kernel tracer check */ |
a4b35e07 | 3047 | if (kernel_tracer_fd == -1) { |
54d01ffb | 3048 | /* Basically, load kernel tracer modules */ |
096102bd DG |
3049 | ret = init_kernel_tracer(); |
3050 | if (ret != 0) { | |
54d01ffb DG |
3051 | goto error; |
3052 | } | |
3053 | } | |
5eb91c98 | 3054 | |
5c827ce0 DG |
3055 | /* Consumer is in an ERROR state. Report back to client */ |
3056 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3057 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3058 | goto error; |
3059 | } | |
3060 | ||
54d01ffb | 3061 | /* Need a session for kernel command */ |
44d3bd01 | 3062 | if (need_tracing_session) { |
54d01ffb | 3063 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 3064 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 3065 | if (ret < 0) { |
f73fabfd | 3066 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
3067 | goto error; |
3068 | } | |
b389abbe | 3069 | } |
7d29a247 | 3070 | |
54d01ffb | 3071 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
3072 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
3073 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 3074 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
3075 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
3076 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 3077 | if (ret < 0) { |
f73fabfd | 3078 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 3079 | goto error; |
950131af | 3080 | } |
5c827ce0 | 3081 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
3082 | } else { |
3083 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 3084 | } |
173af62f | 3085 | |
a4b92340 DG |
3086 | /* |
3087 | * The consumer was just spawned so we need to add the socket to | |
3088 | * the consumer output of the session if exist. | |
3089 | */ | |
3090 | ret = consumer_create_socket(&kconsumer_data, | |
3091 | cmd_ctx->session->kernel_session->consumer); | |
3092 | if (ret < 0) { | |
3093 | goto error; | |
173af62f | 3094 | } |
0d0c377a | 3095 | } |
5c827ce0 | 3096 | |
54d01ffb | 3097 | break; |
b9dfb167 | 3098 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3099 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3100 | case LTTNG_DOMAIN_PYTHON: |
2bdd86d4 | 3101 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 3102 | { |
b51ec5b4 MD |
3103 | if (!ust_app_supported()) { |
3104 | ret = LTTNG_ERR_NO_UST; | |
3105 | goto error; | |
3106 | } | |
5c827ce0 DG |
3107 | /* Consumer is in an ERROR state. Report back to client */ |
3108 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 3109 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3110 | goto error; |
3111 | } | |
3112 | ||
44d3bd01 | 3113 | if (need_tracing_session) { |
a4b92340 | 3114 | /* Create UST session if none exist. */ |
f6a9efaa | 3115 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 3116 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 3117 | &cmd_ctx->lsm->domain); |
f73fabfd | 3118 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
3119 | goto error; |
3120 | } | |
3121 | } | |
00e2e675 | 3122 | |
7753dea8 MD |
3123 | /* Start the UST consumer daemons */ |
3124 | /* 64-bit */ | |
3125 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
e6142f2e | 3126 | if (config.consumerd64_bin_path.value && |
7753dea8 | 3127 | ustconsumer64_data.pid == 0 && |
785d2d0d | 3128 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3129 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3130 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 3131 | if (ret < 0) { |
f73fabfd | 3132 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 3133 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
3134 | goto error; |
3135 | } | |
48842b30 | 3136 | |
173af62f | 3137 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 3138 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 3139 | } else { |
7753dea8 MD |
3140 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
3141 | } | |
173af62f DG |
3142 | |
3143 | /* | |
3144 | * Setup socket for consumer 64 bit. No need for atomic access | |
3145 | * since it was set above and can ONLY be set in this thread. | |
3146 | */ | |
a4b92340 DG |
3147 | ret = consumer_create_socket(&ustconsumer64_data, |
3148 | cmd_ctx->session->ust_session->consumer); | |
3149 | if (ret < 0) { | |
3150 | goto error; | |
173af62f DG |
3151 | } |
3152 | ||
7753dea8 | 3153 | /* 32-bit */ |
385b881b | 3154 | pthread_mutex_lock(&ustconsumer32_data.pid_mutex); |
e6142f2e | 3155 | if (config.consumerd32_bin_path.value && |
7753dea8 | 3156 | ustconsumer32_data.pid == 0 && |
785d2d0d | 3157 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
3158 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
3159 | ret = start_consumerd(&ustconsumer32_data); | |
3160 | if (ret < 0) { | |
f73fabfd | 3161 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 3162 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
3163 | goto error; |
3164 | } | |
5c827ce0 | 3165 | |
173af62f | 3166 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 3167 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
3168 | } else { |
3169 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 3170 | } |
173af62f DG |
3171 | |
3172 | /* | |
3173 | * Setup socket for consumer 64 bit. No need for atomic access | |
3174 | * since it was set above and can ONLY be set in this thread. | |
3175 | */ | |
a4b92340 DG |
3176 | ret = consumer_create_socket(&ustconsumer32_data, |
3177 | cmd_ctx->session->ust_session->consumer); | |
3178 | if (ret < 0) { | |
3179 | goto error; | |
173af62f | 3180 | } |
44d3bd01 DG |
3181 | } |
3182 | break; | |
48842b30 | 3183 | } |
54d01ffb | 3184 | default: |
54d01ffb DG |
3185 | break; |
3186 | } | |
2e09ba09 | 3187 | skip_domain: |
33a2b854 | 3188 | |
5c827ce0 DG |
3189 | /* Validate consumer daemon state when start/stop trace command */ |
3190 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
3191 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
3192 | switch (cmd_ctx->lsm->domain.type) { | |
e7619875 JG |
3193 | case LTTNG_DOMAIN_NONE: |
3194 | break; | |
b9dfb167 | 3195 | case LTTNG_DOMAIN_JUL: |
5cdb6027 | 3196 | case LTTNG_DOMAIN_LOG4J: |
0e115563 | 3197 | case LTTNG_DOMAIN_PYTHON: |
5c827ce0 DG |
3198 | case LTTNG_DOMAIN_UST: |
3199 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3200 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
3201 | goto error; |
3202 | } | |
3203 | break; | |
3204 | case LTTNG_DOMAIN_KERNEL: | |
3205 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 3206 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
3207 | goto error; |
3208 | } | |
3209 | break; | |
825535cc JG |
3210 | default: |
3211 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; | |
3212 | goto error; | |
5c827ce0 DG |
3213 | } |
3214 | } | |
3215 | ||
8e0af1b4 MD |
3216 | /* |
3217 | * Check that the UID or GID match that of the tracing session. | |
3218 | * The root user can interact with all sessions. | |
3219 | */ | |
3220 | if (need_tracing_session) { | |
3221 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
3222 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3223 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 3224 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
3225 | goto error; |
3226 | } | |
3227 | } | |
3228 | ||
ffe60014 DG |
3229 | /* |
3230 | * Send relayd information to consumer as soon as we have a domain and a | |
3231 | * session defined. | |
3232 | */ | |
3233 | if (cmd_ctx->session && need_domain) { | |
3234 | /* | |
3235 | * Setup relayd if not done yet. If the relayd information was already | |
3236 | * sent to the consumer, this call will gracefully return. | |
3237 | */ | |
3238 | ret = cmd_setup_relayd(cmd_ctx->session); | |
3239 | if (ret != LTTNG_OK) { | |
3240 | goto error; | |
3241 | } | |
3242 | } | |
3243 | ||
54d01ffb DG |
3244 | /* Process by command type */ |
3245 | switch (cmd_ctx->lsm->cmd_type) { | |
3246 | case LTTNG_ADD_CONTEXT: | |
3247 | { | |
2001793c JG |
3248 | /* |
3249 | * An LTTNG_ADD_CONTEXT command might have a supplementary | |
3250 | * payload if the context being added is an application context. | |
3251 | */ | |
3252 | if (cmd_ctx->lsm->u.context.ctx.ctx == | |
3253 | LTTNG_EVENT_CONTEXT_APP_CONTEXT) { | |
3254 | char *provider_name = NULL, *context_name = NULL; | |
3255 | size_t provider_name_len = | |
3256 | cmd_ctx->lsm->u.context.provider_name_len; | |
3257 | size_t context_name_len = | |
3258 | cmd_ctx->lsm->u.context.context_name_len; | |
3259 | ||
3260 | if (provider_name_len == 0 || context_name_len == 0) { | |
3261 | /* | |
3262 | * Application provider and context names MUST | |
3263 | * be provided. | |
3264 | */ | |
3265 | ret = -LTTNG_ERR_INVALID; | |
3266 | goto error; | |
3267 | } | |
3268 | ||
3269 | provider_name = zmalloc(provider_name_len + 1); | |
3270 | if (!provider_name) { | |
3271 | ret = -LTTNG_ERR_NOMEM; | |
3272 | goto error; | |
3273 | } | |
e0f4d107 JG |
3274 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = |
3275 | provider_name; | |
2001793c JG |
3276 | |
3277 | context_name = zmalloc(context_name_len + 1); | |
3278 | if (!context_name) { | |
3279 | ret = -LTTNG_ERR_NOMEM; | |
3280 | goto error_add_context; | |
3281 | } | |
e0f4d107 JG |
3282 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = |
3283 | context_name; | |
2001793c JG |
3284 | |
3285 | ret = lttcomm_recv_unix_sock(sock, provider_name, | |
3286 | provider_name_len); | |
3287 | if (ret < 0) { | |
3288 | goto error_add_context; | |
3289 | } | |
3290 | ||
3291 | ret = lttcomm_recv_unix_sock(sock, context_name, | |
3292 | context_name_len); | |
3293 | if (ret < 0) { | |
3294 | goto error_add_context; | |
3295 | } | |
2001793c JG |
3296 | } |
3297 | ||
3298 | /* | |
3299 | * cmd_add_context assumes ownership of the provider and context | |
3300 | * names. | |
3301 | */ | |
3302 | ret = cmd_add_context(cmd_ctx->session, | |
3303 | cmd_ctx->lsm->domain.type, | |
54d01ffb | 3304 | cmd_ctx->lsm->u.context.channel_name, |
2001793c JG |
3305 | &cmd_ctx->lsm->u.context.ctx, |
3306 | kernel_poll_pipe[1]); | |
3307 | ||
3308 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name = NULL; | |
3309 | cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name = NULL; | |
3310 | error_add_context: | |
3311 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.provider_name); | |
3312 | free(cmd_ctx->lsm->u.context.ctx.u.app_ctx.ctx_name); | |
3313 | if (ret < 0) { | |
3314 | goto error; | |
3315 | } | |
54d01ffb DG |
3316 | break; |
3317 | } | |
3318 | case LTTNG_DISABLE_CHANNEL: | |
3319 | { | |
3320 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
3321 | cmd_ctx->lsm->u.disable.channel_name); | |
3322 | break; | |
3323 | } | |
3324 | case LTTNG_DISABLE_EVENT: | |
3325 | { | |
47b7e2f9 JG |
3326 | |
3327 | /* | |
3328 | * FIXME: handle filter; for now we just receive the filter's | |
3329 | * bytecode along with the filter expression which are sent by | |
3330 | * liblttng-ctl and discard them. | |
3331 | * | |
3332 | * This fixes an issue where the client may block while sending | |
3333 | * the filter payload and encounter an error because the session | |
3334 | * daemon closes the socket without ever handling this data. | |
3335 | */ | |
3336 | size_t count = cmd_ctx->lsm->u.disable.expression_len + | |
3337 | cmd_ctx->lsm->u.disable.bytecode_len; | |
3338 | ||
3339 | if (count) { | |
3340 | char data[LTTNG_FILTER_MAX_LEN]; | |
3341 | ||
3342 | DBG("Discarding disable event command payload of size %zu", count); | |
3343 | while (count) { | |
3344 | ret = lttcomm_recv_unix_sock(sock, data, | |
3345 | count > sizeof(data) ? sizeof(data) : count); | |
3346 | if (ret < 0) { | |
3347 | goto error; | |
3348 | } | |
3349 | ||
3350 | count -= (size_t) ret; | |
3351 | } | |
3352 | } | |
6e911cad | 3353 | /* FIXME: passing packed structure to non-packed pointer */ |
54d01ffb DG |
3354 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
3355 | cmd_ctx->lsm->u.disable.channel_name, | |
6e911cad | 3356 | &cmd_ctx->lsm->u.disable.event); |
33a2b854 DG |
3357 | break; |
3358 | } | |
54d01ffb DG |
3359 | case LTTNG_ENABLE_CHANNEL: |
3360 | { | |
b3530820 JG |
3361 | cmd_ctx->lsm->u.channel.chan.attr.extended.ptr = |
3362 | (struct lttng_channel_extended *) &cmd_ctx->lsm->u.channel.extended; | |
7972aab2 | 3363 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
b3530820 JG |
3364 | &cmd_ctx->lsm->u.channel.chan, |
3365 | kernel_poll_pipe[1]); | |
54d01ffb DG |
3366 | break; |
3367 | } | |
ccf10263 MD |
3368 | case LTTNG_TRACK_PID: |
3369 | { | |
3370 | ret = cmd_track_pid(cmd_ctx->session, | |
3371 | cmd_ctx->lsm->domain.type, | |
3372 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3373 | break; | |
3374 | } | |
3375 | case LTTNG_UNTRACK_PID: | |
3376 | { | |
3377 | ret = cmd_untrack_pid(cmd_ctx->session, | |
3378 | cmd_ctx->lsm->domain.type, | |
3379 | cmd_ctx->lsm->u.pid_tracker.pid); | |
3380 | break; | |
3381 | } | |
54d01ffb DG |
3382 | case LTTNG_ENABLE_EVENT: |
3383 | { | |
882ef835 JI |
3384 | struct lttng_event_exclusion *exclusion = NULL; |
3385 | struct lttng_filter_bytecode *bytecode = NULL; | |
6b453b5e | 3386 | char *filter_expression = NULL; |
882ef835 | 3387 | |
67676bd8 DG |
3388 | /* Handle exclusion events and receive it from the client. */ |
3389 | if (cmd_ctx->lsm->u.enable.exclusion_count > 0) { | |
3390 | size_t count = cmd_ctx->lsm->u.enable.exclusion_count; | |
3391 | ||
3392 | exclusion = zmalloc(sizeof(struct lttng_event_exclusion) + | |
3393 | (count * LTTNG_SYMBOL_NAME_LEN)); | |
3394 | if (!exclusion) { | |
3395 | ret = LTTNG_ERR_EXCLUSION_NOMEM; | |
3396 | goto error; | |
882ef835 | 3397 | } |
882ef835 | 3398 | |
67676bd8 DG |
3399 | DBG("Receiving var len exclusion event list from client ..."); |
3400 | exclusion->count = count; | |
3401 | ret = lttcomm_recv_unix_sock(sock, exclusion->names, | |
3402 | count * LTTNG_SYMBOL_NAME_LEN); | |
3403 | if (ret <= 0) { | |
3404 | DBG("Nothing recv() from client var len data... continuing"); | |
3405 | *sock_error = 1; | |
3406 | free(exclusion); | |
3407 | ret = LTTNG_ERR_EXCLUSION_INVAL; | |
3408 | goto error; | |
3409 | } | |
3410 | } | |
3411 | ||
6b453b5e JG |
3412 | /* Get filter expression from client. */ |
3413 | if (cmd_ctx->lsm->u.enable.expression_len > 0) { | |
3414 | size_t expression_len = | |
3415 | cmd_ctx->lsm->u.enable.expression_len; | |
3416 | ||
3417 | if (expression_len > LTTNG_FILTER_MAX_LEN) { | |
3418 | ret = LTTNG_ERR_FILTER_INVAL; | |
3419 | free(exclusion); | |
3420 | goto error; | |
3421 | } | |
3422 | ||
3423 | filter_expression = zmalloc(expression_len); | |
3424 | if (!filter_expression) { | |
3425 | free(exclusion); | |
3426 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3427 | goto error; | |
3428 | } | |
3429 | ||
3430 | /* Receive var. len. data */ | |
3431 | DBG("Receiving var len filter's expression from client ..."); | |
3432 | ret = lttcomm_recv_unix_sock(sock, filter_expression, | |
3433 | expression_len); | |
3434 | if (ret <= 0) { | |
3435 | DBG("Nothing recv() from client car len data... continuing"); | |
3436 | *sock_error = 1; | |
3437 | free(filter_expression); | |
3438 | free(exclusion); | |
3439 | ret = LTTNG_ERR_FILTER_INVAL; | |
3440 | goto error; | |
3441 | } | |
3442 | } | |
3443 | ||
67676bd8 DG |
3444 | /* Handle filter and get bytecode from client. */ |
3445 | if (cmd_ctx->lsm->u.enable.bytecode_len > 0) { | |
3446 | size_t bytecode_len = cmd_ctx->lsm->u.enable.bytecode_len; | |
3447 | ||
3448 | if (bytecode_len > LTTNG_FILTER_MAX_LEN) { | |
3449 | ret = LTTNG_ERR_FILTER_INVAL; | |
49d21f93 | 3450 | free(filter_expression); |
67676bd8 DG |
3451 | free(exclusion); |
3452 | goto error; | |
3453 | } | |
3454 | ||
3455 | bytecode = zmalloc(bytecode_len); | |
3456 | if (!bytecode) { | |
49d21f93 | 3457 | free(filter_expression); |
67676bd8 DG |
3458 | free(exclusion); |
3459 | ret = LTTNG_ERR_FILTER_NOMEM; | |
3460 | goto error; | |
882ef835 JI |
3461 | } |
3462 | ||
67676bd8 DG |
3463 | /* Receive var. len. data */ |
3464 | DBG("Receiving var len filter's bytecode from client ..."); | |
3465 | ret = lttcomm_recv_unix_sock(sock, bytecode, bytecode_len); | |
3466 | if (ret <= 0) { | |
3467 | DBG("Nothing recv() from client car len data... continuing"); | |
3468 | *sock_error = 1; | |
49d21f93 | 3469 | free(filter_expression); |
67676bd8 DG |
3470 | free(bytecode); |
3471 | free(exclusion); | |
3472 | ret = LTTNG_ERR_FILTER_INVAL; | |
3473 | goto error; | |
3474 | } | |
3475 | ||
3476 | if ((bytecode->len + sizeof(*bytecode)) != bytecode_len) { | |
49d21f93 | 3477 | free(filter_expression); |
67676bd8 DG |
3478 | free(bytecode); |
3479 | free(exclusion); | |
3480 | ret = LTTNG_ERR_FILTER_INVAL; | |
3481 | goto error; | |
3482 | } | |
882ef835 | 3483 | } |
67676bd8 DG |
3484 | |
3485 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, | |
3486 | cmd_ctx->lsm->u.enable.channel_name, | |
6b453b5e JG |
3487 | &cmd_ctx->lsm->u.enable.event, |
3488 | filter_expression, bytecode, exclusion, | |
67676bd8 | 3489 | kernel_poll_pipe[1]); |
54d01ffb DG |
3490 | break; |
3491 | } | |
052da939 | 3492 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 3493 | { |
9f19cc17 | 3494 | struct lttng_event *events; |
54d01ffb | 3495 | ssize_t nb_events; |
052da939 | 3496 | |
0845bbfa | 3497 | session_lock_list(); |
54d01ffb | 3498 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
0845bbfa | 3499 | session_unlock_list(); |
54d01ffb | 3500 | if (nb_events < 0) { |
f73fabfd | 3501 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3502 | ret = -nb_events; |
3503 | goto error; | |
2ef84c95 DG |
3504 | } |
3505 | ||
3506 | /* | |
3507 | * Setup lttng message with payload size set to the event list size in | |
3508 | * bytes and then copy list into the llm payload. | |
3509 | */ | |
6e10c9b9 PP |
3510 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3511 | sizeof(struct lttng_event) * nb_events); | |
3512 | free(events); | |
3513 | ||
2ef84c95 DG |
3514 | if (ret < 0) { |
3515 | goto setup_error; | |
3516 | } | |
3517 | ||
f73fabfd | 3518 | ret = LTTNG_OK; |
2ef84c95 DG |
3519 | break; |
3520 | } | |
f37d259d MD |
3521 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
3522 | { | |
3523 | struct lttng_event_field *fields; | |
3524 | ssize_t nb_fields; | |
3525 | ||
0845bbfa | 3526 | session_lock_list(); |
a4b92340 DG |
3527 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
3528 | &fields); | |
0845bbfa | 3529 | session_unlock_list(); |
f37d259d | 3530 | if (nb_fields < 0) { |
f73fabfd | 3531 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
3532 | ret = -nb_fields; |
3533 | goto error; | |
3534 | } | |
3535 | ||
3536 | /* | |
3537 | * Setup lttng message with payload size set to the event list size in | |
3538 | * bytes and then copy list into the llm payload. | |
3539 | */ | |
6e10c9b9 | 3540 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, fields, |
a4b92340 | 3541 | sizeof(struct lttng_event_field) * nb_fields); |
6e10c9b9 PP |
3542 | free(fields); |
3543 | ||
f37d259d | 3544 | if (ret < 0) { |
f37d259d MD |
3545 | goto setup_error; |
3546 | } | |
3547 | ||
f73fabfd | 3548 | ret = LTTNG_OK; |
f37d259d MD |
3549 | break; |
3550 | } | |
834978fd DG |
3551 | case LTTNG_LIST_SYSCALLS: |
3552 | { | |
3553 | struct lttng_event *events; | |
3554 | ssize_t nb_events; | |
3555 | ||
3556 | nb_events = cmd_list_syscalls(&events); | |
3557 | if (nb_events < 0) { | |
3558 | /* Return value is a negative lttng_error_code. */ | |
3559 | ret = -nb_events; | |
3560 | goto error; | |
3561 | } | |
3562 | ||
3563 | /* | |
3564 | * Setup lttng message with payload size set to the event list size in | |
3565 | * bytes and then copy list into the llm payload. | |
3566 | */ | |
6e10c9b9 PP |
3567 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, events, |
3568 | sizeof(struct lttng_event) * nb_events); | |
3569 | free(events); | |
3570 | ||
834978fd | 3571 | if (ret < 0) { |
834978fd DG |
3572 | goto setup_error; |
3573 | } | |
3574 | ||
834978fd DG |
3575 | ret = LTTNG_OK; |
3576 | break; | |
3577 | } | |
a5dfbb9d MD |
3578 | case LTTNG_LIST_TRACKER_PIDS: |
3579 | { | |
3580 | int32_t *pids = NULL; | |
3581 | ssize_t nr_pids; | |
3582 | ||
3583 | nr_pids = cmd_list_tracker_pids(cmd_ctx->session, | |
3584 | cmd_ctx->lsm->domain.type, &pids); | |
3585 | if (nr_pids < 0) { | |
3586 | /* Return value is a negative lttng_error_code. */ | |
3587 | ret = -nr_pids; | |
3588 | goto error; | |
3589 | } | |
3590 | ||
3591 | /* | |
3592 | * Setup lttng message with payload size set to the event list size in | |
3593 | * bytes and then copy list into the llm payload. | |
3594 | */ | |
6e10c9b9 PP |
3595 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, pids, |
3596 | sizeof(int32_t) * nr_pids); | |
3597 | free(pids); | |
3598 | ||
a5dfbb9d | 3599 | if (ret < 0) { |
a5dfbb9d MD |
3600 | goto setup_error; |
3601 | } | |
3602 | ||
a5dfbb9d MD |
3603 | ret = LTTNG_OK; |
3604 | break; | |
3605 | } | |
00e2e675 DG |
3606 | case LTTNG_SET_CONSUMER_URI: |
3607 | { | |
a4b92340 DG |
3608 | size_t nb_uri, len; |
3609 | struct lttng_uri *uris; | |
3610 | ||
3611 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3612 | len = nb_uri * sizeof(struct lttng_uri); | |
3613 | ||
3614 | if (nb_uri == 0) { | |
f73fabfd | 3615 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3616 | goto error; |
3617 | } | |
3618 | ||
3619 | uris = zmalloc(len); | |
3620 | if (uris == NULL) { | |
f73fabfd | 3621 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3622 | goto error; |
3623 | } | |
3624 | ||
3625 | /* Receive variable len data */ | |
77c7c900 | 3626 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3627 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3628 | if (ret <= 0) { | |
3629 | DBG("No URIs received from client... continuing"); | |
3630 | *sock_error = 1; | |
f73fabfd | 3631 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3632 | free(uris); |
a4b92340 DG |
3633 | goto error; |
3634 | } | |
3635 | ||
bda32d56 JG |
3636 | ret = cmd_set_consumer_uri(cmd_ctx->session, nb_uri, uris); |
3637 | free(uris); | |
f73fabfd | 3638 | if (ret != LTTNG_OK) { |
a4b92340 DG |
3639 | goto error; |
3640 | } | |
3641 | ||
b1d41407 | 3642 | |
00e2e675 DG |
3643 | break; |
3644 | } | |
f3ed775e | 3645 | case LTTNG_START_TRACE: |
8c0faa1d | 3646 | { |
54d01ffb | 3647 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3648 | break; |
3649 | } | |
f3ed775e | 3650 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3651 | { |
54d01ffb | 3652 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3653 | break; |
3654 | } | |
5e16da05 MD |
3655 | case LTTNG_CREATE_SESSION: |
3656 | { | |
a4b92340 DG |
3657 | size_t nb_uri, len; |
3658 | struct lttng_uri *uris = NULL; | |
3659 | ||
3660 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3661 | len = nb_uri * sizeof(struct lttng_uri); | |
3662 | ||
3663 | if (nb_uri > 0) { | |
3664 | uris = zmalloc(len); | |
3665 | if (uris == NULL) { | |
f73fabfd | 3666 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3667 | goto error; |
3668 | } | |
3669 | ||
3670 | /* Receive variable len data */ | |
77c7c900 | 3671 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3672 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3673 | if (ret <= 0) { | |
3674 | DBG("No URIs received from client... continuing"); | |
3675 | *sock_error = 1; | |
f73fabfd | 3676 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3677 | free(uris); |
a4b92340 DG |
3678 | goto error; |
3679 | } | |
3680 | ||
3681 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3682 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3683 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3684 | free(uris); |
a4b92340 DG |
3685 | goto error; |
3686 | } | |
3687 | } | |
3688 | ||
3689 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3690 | &cmd_ctx->creds, 0); |
a4b92340 | 3691 | |
b1d41407 DG |
3692 | free(uris); |
3693 | ||
00e2e675 DG |
3694 | break; |
3695 | } | |
5e16da05 MD |
3696 | case LTTNG_DESTROY_SESSION: |
3697 | { | |
2f77fc4b | 3698 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3699 | |
3700 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3701 | cmd_ctx->session = NULL; |
5461b305 | 3702 | break; |
5e16da05 | 3703 | } |
9f19cc17 | 3704 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3705 | { |
54d01ffb | 3706 | ssize_t nb_dom; |
fa64dfb4 | 3707 | struct lttng_domain *domains = NULL; |
5461b305 | 3708 | |
54d01ffb DG |
3709 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3710 | if (nb_dom < 0) { | |
f73fabfd | 3711 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3712 | ret = -nb_dom; |
3713 | goto error; | |
ce3d728c | 3714 | } |
520ff687 | 3715 | |
6e10c9b9 PP |
3716 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, domains, |
3717 | nb_dom * sizeof(struct lttng_domain)); | |
3718 | free(domains); | |
3719 | ||
5461b305 DG |
3720 | if (ret < 0) { |
3721 | goto setup_error; | |
520ff687 | 3722 | } |
57167058 | 3723 | |
f73fabfd | 3724 | ret = LTTNG_OK; |
5e16da05 MD |
3725 | break; |
3726 | } | |
9f19cc17 | 3727 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3728 | { |
53e367f9 | 3729 | ssize_t payload_size; |
ade7ce52 | 3730 | struct lttng_channel *channels = NULL; |
54d01ffb | 3731 | |
53e367f9 | 3732 | payload_size = cmd_list_channels(cmd_ctx->lsm->domain.type, |
b551a063 | 3733 | cmd_ctx->session, &channels); |
53e367f9 | 3734 | if (payload_size < 0) { |
f73fabfd | 3735 | /* Return value is a negative lttng_error_code. */ |
53e367f9 | 3736 | ret = -payload_size; |
54d01ffb | 3737 | goto error; |
5461b305 | 3738 | } |
ca95a216 | 3739 | |
6e10c9b9 | 3740 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, channels, |
53e367f9 | 3741 | payload_size); |
6e10c9b9 PP |
3742 | free(channels); |
3743 | ||
5461b305 DG |
3744 | if (ret < 0) { |
3745 | goto setup_error; | |
3746 | } | |
9f19cc17 | 3747 | |
f73fabfd | 3748 | ret = LTTNG_OK; |
5461b305 | 3749 | break; |
5e16da05 | 3750 | } |
9f19cc17 | 3751 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3752 | { |
b551a063 | 3753 | ssize_t nb_event; |
684d34d2 | 3754 | struct lttng_event *events = NULL; |
b4e3ceb9 PP |
3755 | struct lttcomm_event_command_header cmd_header; |
3756 | size_t total_size; | |
3757 | ||
b2d66287 | 3758 | memset(&cmd_header, 0, sizeof(cmd_header)); |
b4e3ceb9 PP |
3759 | /* Extended infos are included at the end of events */ |
3760 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, | |
3761 | cmd_ctx->session, cmd_ctx->lsm->u.list.channel_name, | |
3762 | &events, &total_size); | |
9f19cc17 | 3763 | |
54d01ffb | 3764 | if (nb_event < 0) { |
f73fabfd | 3765 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3766 | ret = -nb_event; |
3767 | goto error; | |
5461b305 | 3768 | } |
ca95a216 | 3769 | |
b4e3ceb9 PP |
3770 | cmd_header.nb_events = nb_event; |
3771 | ret = setup_lttng_msg(cmd_ctx, events, total_size, | |
3772 | &cmd_header, sizeof(cmd_header)); | |
6e10c9b9 PP |
3773 | free(events); |
3774 | ||
5461b305 DG |
3775 | if (ret < 0) { |
3776 | goto setup_error; | |
3777 | } | |
9f19cc17 | 3778 | |
f73fabfd | 3779 | ret = LTTNG_OK; |
5461b305 | 3780 | break; |
5e16da05 MD |
3781 | } |
3782 | case LTTNG_LIST_SESSIONS: | |
3783 | { | |
8e0af1b4 | 3784 | unsigned int nr_sessions; |
6e10c9b9 PP |
3785 | void *sessions_payload; |
3786 | size_t payload_len; | |
5461b305 | 3787 | |
8e0af1b4 | 3788 | session_lock_list(); |
730389d9 DG |
3789 | nr_sessions = lttng_sessions_count( |
3790 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3791 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6e10c9b9 PP |
3792 | payload_len = sizeof(struct lttng_session) * nr_sessions; |
3793 | sessions_payload = zmalloc(payload_len); | |
d32fb093 | 3794 | |
6e10c9b9 | 3795 | if (!sessions_payload) { |
54d01ffb | 3796 | session_unlock_list(); |
6e10c9b9 | 3797 | ret = -ENOMEM; |
5461b305 | 3798 | goto setup_error; |
e065084a | 3799 | } |
5e16da05 | 3800 | |
6e10c9b9 | 3801 | cmd_list_lttng_sessions(sessions_payload, |
730389d9 DG |
3802 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3803 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
54d01ffb | 3804 | session_unlock_list(); |
5e16da05 | 3805 | |
6e10c9b9 PP |
3806 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, sessions_payload, |
3807 | payload_len); | |
3808 | free(sessions_payload); | |
3809 | ||
3810 | if (ret < 0) { | |
3811 | goto setup_error; | |
3812 | } | |
3813 | ||
f73fabfd | 3814 | ret = LTTNG_OK; |
5e16da05 MD |
3815 | break; |
3816 | } | |
d9800920 DG |
3817 | case LTTNG_REGISTER_CONSUMER: |
3818 | { | |
2f77fc4b DG |
3819 | struct consumer_data *cdata; |
3820 | ||
3821 | switch (cmd_ctx->lsm->domain.type) { | |
3822 | case LTTNG_DOMAIN_KERNEL: | |
3823 | cdata = &kconsumer_data; | |
3824 | break; | |
3825 | default: | |
f73fabfd | 3826 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3827 | goto error; |
3828 | } | |
3829 | ||
54d01ffb | 3830 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3831 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3832 | break; |
3833 | } | |
6d805429 | 3834 | case LTTNG_DATA_PENDING: |
806e2684 | 3835 | { |
f6151c55 | 3836 | int pending_ret; |
6e10c9b9 | 3837 | uint8_t pending_ret_byte; |
f6151c55 JG |
3838 | |
3839 | pending_ret = cmd_data_pending(cmd_ctx->session); | |
6e10c9b9 | 3840 | |
f6151c55 JG |
3841 | /* |
3842 | * FIXME | |
3843 | * | |
3844 | * This function may returns 0 or 1 to indicate whether or not | |
3845 | * there is data pending. In case of error, it should return an | |
3846 | * LTTNG_ERR code. However, some code paths may still return | |
3847 | * a nondescript error code, which we handle by returning an | |
3848 | * "unknown" error. | |
3849 | */ | |
3850 | if (pending_ret == 0 || pending_ret == 1) { | |
6e10c9b9 PP |
3851 | /* |
3852 | * ret will be set to LTTNG_OK at the end of | |
3853 | * this function. | |
3854 | */ | |
f6151c55 JG |
3855 | } else if (pending_ret < 0) { |
3856 | ret = LTTNG_ERR_UNK; | |
3857 | goto setup_error; | |
3858 | } else { | |
3859 | ret = pending_ret; | |
3860 | goto setup_error; | |
3861 | } | |
3862 | ||
6e10c9b9 PP |
3863 | pending_ret_byte = (uint8_t) pending_ret; |
3864 | ||
3865 | /* 1 byte to return whether or not data is pending */ | |
3866 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, | |
3867 | &pending_ret_byte, 1); | |
3868 | ||
3869 | if (ret < 0) { | |
3870 | goto setup_error; | |
3871 | } | |
3872 | ||
3873 | ret = LTTNG_OK; | |
806e2684 DG |
3874 | break; |
3875 | } | |
da3c9ec1 DG |
3876 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3877 | { | |
6dc3064a DG |
3878 | struct lttcomm_lttng_output_id reply; |
3879 | ||
3880 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3881 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3882 | if (ret != LTTNG_OK) { | |
3883 | goto error; | |
3884 | } | |
3885 | ||
6e10c9b9 PP |
3886 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, &reply, |
3887 | sizeof(reply)); | |
6dc3064a DG |
3888 | if (ret < 0) { |
3889 | goto setup_error; | |
3890 | } | |
3891 | ||
3892 | /* Copy output list into message payload */ | |
6dc3064a | 3893 | ret = LTTNG_OK; |
da3c9ec1 DG |
3894 | break; |
3895 | } | |
3896 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3897 | { | |
6dc3064a DG |
3898 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3899 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3900 | break; |
3901 | } | |
3902 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3903 | { | |
6dc3064a DG |
3904 | ssize_t nb_output; |
3905 | struct lttng_snapshot_output *outputs = NULL; | |
3906 | ||
3907 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3908 | if (nb_output < 0) { | |
3909 | ret = -nb_output; | |
3910 | goto error; | |
3911 | } | |
3912 | ||
6e10c9b9 PP |
3913 | assert((nb_output > 0 && outputs) || nb_output == 0); |
3914 | ret = setup_lttng_msg_no_cmd_header(cmd_ctx, outputs, | |
6dc3064a | 3915 | nb_output * sizeof(struct lttng_snapshot_output)); |
6e10c9b9 PP |
3916 | free(outputs); |
3917 | ||
6dc3064a | 3918 | if (ret < 0) { |
6dc3064a DG |
3919 | goto setup_error; |
3920 | } | |
3921 | ||
6dc3064a | 3922 | ret = LTTNG_OK; |
da3c9ec1 DG |
3923 | break; |
3924 | } | |
3925 | case LTTNG_SNAPSHOT_RECORD: | |
3926 | { | |
6dc3064a DG |
3927 | ret = cmd_snapshot_record(cmd_ctx->session, |
3928 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3929 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3930 | break; |
3931 | } | |
27babd3a DG |
3932 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3933 | { | |
3934 | size_t nb_uri, len; | |
3935 | struct lttng_uri *uris = NULL; | |
3936 | ||
3937 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3938 | len = nb_uri * sizeof(struct lttng_uri); | |
3939 | ||
3940 | if (nb_uri > 0) { | |
3941 | uris = zmalloc(len); | |
3942 | if (uris == NULL) { | |
3943 | ret = LTTNG_ERR_FATAL; | |
3944 | goto error; | |
3945 | } | |
3946 | ||
3947 | /* Receive variable len data */ | |
3948 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3949 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3950 | if (ret <= 0) { | |
3951 | DBG("No URIs received from client... continuing"); | |
3952 | *sock_error = 1; | |
3953 | ret = LTTNG_ERR_SESSION_FAIL; | |
3954 | free(uris); | |
3955 | goto error; | |
3956 | } | |
3957 | ||
3958 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3959 | DBG("Creating session with ONE network URI is a bad call"); | |
3960 | ret = LTTNG_ERR_SESSION_FAIL; | |
3961 | free(uris); | |
3962 | goto error; | |
3963 | } | |
3964 | } | |
3965 | ||
3966 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3967 | nb_uri, &cmd_ctx->creds); | |
3968 | free(uris); | |
3969 | break; | |
3970 | } | |
ecc48a90 JD |
3971 | case LTTNG_CREATE_SESSION_LIVE: |
3972 | { | |
3973 | size_t nb_uri, len; | |
3974 | struct lttng_uri *uris = NULL; | |
3975 | ||
3976 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3977 | len = nb_uri * sizeof(struct lttng_uri); | |
3978 | ||
3979 | if (nb_uri > 0) { | |
3980 | uris = zmalloc(len); | |
3981 | if (uris == NULL) { | |
3982 | ret = LTTNG_ERR_FATAL; | |
3983 | goto error; | |
3984 | } | |
3985 | ||
3986 | /* Receive variable len data */ | |
3987 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3988 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3989 | if (ret <= 0) { | |
3990 | DBG("No URIs received from client... continuing"); | |
3991 | *sock_error = 1; | |
3992 | ret = LTTNG_ERR_SESSION_FAIL; | |
3993 | free(uris); | |
3994 | goto error; | |
3995 | } | |
3996 | ||
3997 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3998 | DBG("Creating session with ONE network URI is a bad call"); | |
3999 | ret = LTTNG_ERR_SESSION_FAIL; | |
4000 | free(uris); | |
4001 | goto error; | |
4002 | } | |
4003 | } | |
4004 | ||
4005 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
4006 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
4007 | free(uris); | |
4008 | break; | |
4009 | } | |
fb198a11 JG |
4010 | case LTTNG_SAVE_SESSION: |
4011 | { | |
4012 | ret = cmd_save_sessions(&cmd_ctx->lsm->u.save_session.attr, | |
4013 | &cmd_ctx->creds); | |
4014 | break; | |
4015 | } | |
d7ba1388 MD |
4016 | case LTTNG_SET_SESSION_SHM_PATH: |
4017 | { | |
4018 | ret = cmd_set_session_shm_path(cmd_ctx->session, | |
4019 | cmd_ctx->lsm->u.set_shm_path.shm_path); | |
4020 | break; | |
4021 | } | |
eded6438 | 4022 | case LTTNG_REGENERATE_METADATA: |
93ec662e | 4023 | { |
eded6438 | 4024 | ret = cmd_regenerate_metadata(cmd_ctx->session); |
93ec662e JD |
4025 | break; |
4026 | } | |
c2561365 JD |
4027 | case LTTNG_REGENERATE_STATEDUMP: |
4028 | { | |
4029 | ret = cmd_regenerate_statedump(cmd_ctx->session); | |
4030 | break; | |
4031 | } | |
b3530820 JG |
4032 | case LTTNG_REGISTER_TRIGGER: |
4033 | { | |
4034 | ret = cmd_register_trigger(cmd_ctx, sock, | |
4035 | notification_thread_handle); | |
4036 | break; | |
4037 | } | |
4038 | case LTTNG_UNREGISTER_TRIGGER: | |
4039 | { | |
4040 | ret = cmd_unregister_trigger(cmd_ctx, sock, | |
4041 | notification_thread_handle); | |
4042 | break; | |
4043 | } | |
5e16da05 | 4044 | default: |
f73fabfd | 4045 | ret = LTTNG_ERR_UND; |
5461b305 | 4046 | break; |
fac6795d DG |
4047 | } |
4048 | ||
5461b305 | 4049 | error: |
5461b305 DG |
4050 | if (cmd_ctx->llm == NULL) { |
4051 | DBG("Missing llm structure. Allocating one."); | |
6e10c9b9 | 4052 | if (setup_lttng_msg_no_cmd_header(cmd_ctx, NULL, 0) < 0) { |
5461b305 DG |
4053 | goto setup_error; |
4054 | } | |
4055 | } | |
54d01ffb | 4056 | /* Set return code */ |
5461b305 | 4057 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 4058 | setup_error: |
b5541356 | 4059 | if (cmd_ctx->session) { |
54d01ffb | 4060 | session_unlock(cmd_ctx->session); |
b5541356 | 4061 | } |
256a5576 MD |
4062 | if (need_tracing_session) { |
4063 | session_unlock_list(); | |
4064 | } | |
54d01ffb | 4065 | init_setup_error: |
3745d315 | 4066 | assert(!rcu_read_ongoing()); |
8028d920 | 4067 | return ret; |
fac6795d DG |
4068 | } |
4069 | ||
44a5e5eb DG |
4070 | /* |
4071 | * Thread managing health check socket. | |
4072 | */ | |
4073 | static void *thread_manage_health(void *data) | |
4074 | { | |
eb4a2943 | 4075 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
4076 | uint32_t revents, nb_fd; |
4077 | struct lttng_poll_event events; | |
0c89d795 MD |
4078 | struct health_comm_msg msg; |
4079 | struct health_comm_reply reply; | |
44a5e5eb DG |
4080 | |
4081 | DBG("[thread] Manage health check started"); | |
4082 | ||
4083 | rcu_register_thread(); | |
4084 | ||
6d737ce4 DG |
4085 | /* We might hit an error path before this is created. */ |
4086 | lttng_poll_init(&events); | |
3cc04881 | 4087 | |
44a5e5eb | 4088 | /* Create unix socket */ |
e6142f2e | 4089 | sock = lttcomm_create_unix_sock(config.health_unix_sock_path.value); |
44a5e5eb DG |
4090 | if (sock < 0) { |
4091 | ERR("Unable to create health check Unix socket"); | |
44a5e5eb DG |
4092 | goto error; |
4093 | } | |
4094 | ||
6c71277b MD |
4095 | if (is_root) { |
4096 | /* lttng health client socket path permissions */ | |
e6142f2e JG |
4097 | ret = chown(config.health_unix_sock_path.value, 0, |
4098 | utils_get_group_id(config.tracing_group_name.value)); | |
6c71277b | 4099 | if (ret < 0) { |
e6142f2e | 4100 | ERR("Unable to set group on %s", config.health_unix_sock_path.value); |
6c71277b | 4101 | PERROR("chown"); |
6c71277b MD |
4102 | goto error; |
4103 | } | |
4104 | ||
e6142f2e | 4105 | ret = chmod(config.health_unix_sock_path.value, |
6c71277b MD |
4106 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
4107 | if (ret < 0) { | |
e6142f2e | 4108 | ERR("Unable to set permissions on %s", config.health_unix_sock_path.value); |
6c71277b | 4109 | PERROR("chmod"); |
6c71277b MD |
4110 | goto error; |
4111 | } | |
4112 | } | |
4113 | ||
b662582b DG |
4114 | /* |
4115 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4116 | * show must go on. | |
4117 | */ | |
4118 | (void) utils_set_fd_cloexec(sock); | |
4119 | ||
44a5e5eb DG |
4120 | ret = lttcomm_listen_unix_sock(sock); |
4121 | if (ret < 0) { | |
4122 | goto error; | |
4123 | } | |
4124 | ||
4125 | /* | |
4126 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4127 | * more will be added to this poll set. | |
4128 | */ | |
d0b96690 | 4129 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
4130 | if (ret < 0) { |
4131 | goto error; | |
4132 | } | |
4133 | ||
4134 | /* Add the application registration socket */ | |
4135 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
4136 | if (ret < 0) { | |
4137 | goto error; | |
4138 | } | |
4139 | ||
ef367a93 | 4140 | sessiond_notify_ready(); |
97bc1426 | 4141 | |
44a5e5eb DG |
4142 | while (1) { |
4143 | DBG("Health check ready"); | |
4144 | ||
44a5e5eb DG |
4145 | /* Inifinite blocking call, waiting for transmission */ |
4146 | restart: | |
4147 | ret = lttng_poll_wait(&events, -1); | |
4148 | if (ret < 0) { | |
4149 | /* | |
4150 | * Restart interrupted system call. | |
4151 | */ | |
4152 | if (errno == EINTR) { | |
4153 | goto restart; | |
4154 | } | |
4155 | goto error; | |
4156 | } | |
4157 | ||
0d9c5d77 DG |
4158 | nb_fd = ret; |
4159 | ||
44a5e5eb DG |
4160 | for (i = 0; i < nb_fd; i++) { |
4161 | /* Fetch once the poll data */ | |
4162 | revents = LTTNG_POLL_GETEV(&events, i); | |
4163 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4164 | ||
fd20dac9 MD |
4165 | if (!revents) { |
4166 | /* No activity for this FD (poll implementation). */ | |
4167 | continue; | |
4168 | } | |
4169 | ||
44a5e5eb | 4170 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4171 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 4172 | if (ret) { |
139ac872 MD |
4173 | err = 0; |
4174 | goto exit; | |
44a5e5eb DG |
4175 | } |
4176 | ||
4177 | /* Event on the registration socket */ | |
4178 | if (pollfd == sock) { | |
03e43155 MD |
4179 | if (revents & LPOLLIN) { |
4180 | continue; | |
4181 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
44a5e5eb DG |
4182 | ERR("Health socket poll error"); |
4183 | goto error; | |
03e43155 MD |
4184 | } else { |
4185 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4186 | goto error; | |
44a5e5eb DG |
4187 | } |
4188 | } | |
4189 | } | |
4190 | ||
4191 | new_sock = lttcomm_accept_unix_sock(sock); | |
4192 | if (new_sock < 0) { | |
4193 | goto error; | |
4194 | } | |
4195 | ||
b662582b DG |
4196 | /* |
4197 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4198 | * show must go on. | |
4199 | */ | |
4200 | (void) utils_set_fd_cloexec(new_sock); | |
4201 | ||
44a5e5eb DG |
4202 | DBG("Receiving data from client for health..."); |
4203 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
4204 | if (ret <= 0) { | |
4205 | DBG("Nothing recv() from client... continuing"); | |
4206 | ret = close(new_sock); | |
4207 | if (ret) { | |
4208 | PERROR("close"); | |
4209 | } | |
44a5e5eb DG |
4210 | continue; |
4211 | } | |
4212 | ||
4213 | rcu_thread_online(); | |
4214 | ||
53efb85a | 4215 | memset(&reply, 0, sizeof(reply)); |
6c71277b MD |
4216 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { |
4217 | /* | |
4218 | * health_check_state returns 0 if health is | |
4219 | * bad. | |
4220 | */ | |
4221 | if (!health_check_state(health_sessiond, i)) { | |
4222 | reply.ret_code |= 1ULL << i; | |
4223 | } | |
44a5e5eb DG |
4224 | } |
4225 | ||
6c71277b | 4226 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
4227 | |
4228 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
4229 | if (ret < 0) { | |
4230 | ERR("Failed to send health data back to client"); | |
4231 | } | |
4232 | ||
4233 | /* End of transmission */ | |
4234 | ret = close(new_sock); | |
4235 | if (ret) { | |
4236 | PERROR("close"); | |
4237 | } | |
44a5e5eb DG |
4238 | } |
4239 | ||
139ac872 | 4240 | exit: |
44a5e5eb | 4241 | error: |
139ac872 MD |
4242 | if (err) { |
4243 | ERR("Health error occurred in %s", __func__); | |
4244 | } | |
44a5e5eb | 4245 | DBG("Health check thread dying"); |
e6142f2e | 4246 | unlink(config.health_unix_sock_path.value); |
44a5e5eb DG |
4247 | if (sock >= 0) { |
4248 | ret = close(sock); | |
4249 | if (ret) { | |
4250 | PERROR("close"); | |
4251 | } | |
4252 | } | |
44a5e5eb DG |
4253 | |
4254 | lttng_poll_clean(&events); | |
b11d6a7f | 4255 | stop_threads(); |
44a5e5eb DG |
4256 | rcu_unregister_thread(); |
4257 | return NULL; | |
4258 | } | |
4259 | ||
1d4b027a | 4260 | /* |
d063d709 DG |
4261 | * This thread manage all clients request using the unix client socket for |
4262 | * communication. | |
1d4b027a DG |
4263 | */ |
4264 | static void *thread_manage_clients(void *data) | |
4265 | { | |
139ac872 | 4266 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 4267 | int sock_error; |
5eb91c98 | 4268 | uint32_t revents, nb_fd; |
273ea72c | 4269 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 4270 | struct lttng_poll_event events; |
1d4b027a DG |
4271 | |
4272 | DBG("[thread] Manage client started"); | |
4273 | ||
f6a9efaa DG |
4274 | rcu_register_thread(); |
4275 | ||
6c71277b | 4276 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 4277 | |
840cb59c | 4278 | health_code_update(); |
44a5e5eb | 4279 | |
1d4b027a DG |
4280 | ret = lttcomm_listen_unix_sock(client_sock); |
4281 | if (ret < 0) { | |
35df2755 | 4282 | goto error_listen; |
1d4b027a DG |
4283 | } |
4284 | ||
5eb91c98 DG |
4285 | /* |
4286 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
4287 | * more will be added to this poll set. | |
4288 | */ | |
d0b96690 | 4289 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 4290 | if (ret < 0) { |
35df2755 | 4291 | goto error_create_poll; |
5eb91c98 | 4292 | } |
273ea72c | 4293 | |
5eb91c98 DG |
4294 | /* Add the application registration socket */ |
4295 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
4296 | if (ret < 0) { | |
4297 | goto error; | |
4298 | } | |
273ea72c | 4299 | |
ef367a93 JG |
4300 | sessiond_notify_ready(); |
4301 | ret = sem_post(&load_info->message_thread_ready); | |
4302 | if (ret) { | |
4303 | PERROR("sem_post message_thread_ready"); | |
4304 | goto error; | |
4305 | } | |
0bb7724a | 4306 | |
72453c8c MD |
4307 | /* This testpoint is after we signal readiness to the parent. */ |
4308 | if (testpoint(sessiond_thread_manage_clients)) { | |
4309 | goto error; | |
4310 | } | |
4311 | ||
e547b070 | 4312 | if (testpoint(sessiond_thread_manage_clients_before_loop)) { |
6993eeb3 CB |
4313 | goto error; |
4314 | } | |
8ac94142 | 4315 | |
840cb59c | 4316 | health_code_update(); |
44a5e5eb | 4317 | |
1d4b027a | 4318 | while (1) { |
1d4b027a | 4319 | DBG("Accepting client command ..."); |
273ea72c DG |
4320 | |
4321 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 4322 | restart: |
a78af745 | 4323 | health_poll_entry(); |
5eb91c98 | 4324 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 4325 | health_poll_exit(); |
273ea72c | 4326 | if (ret < 0) { |
88f2b785 MD |
4327 | /* |
4328 | * Restart interrupted system call. | |
4329 | */ | |
4330 | if (errno == EINTR) { | |
4331 | goto restart; | |
4332 | } | |
273ea72c DG |
4333 | goto error; |
4334 | } | |
4335 | ||
0d9c5d77 DG |
4336 | nb_fd = ret; |
4337 | ||
5eb91c98 DG |
4338 | for (i = 0; i < nb_fd; i++) { |
4339 | /* Fetch once the poll data */ | |
4340 | revents = LTTNG_POLL_GETEV(&events, i); | |
4341 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
4342 | ||
840cb59c | 4343 | health_code_update(); |
44a5e5eb | 4344 | |
fd20dac9 MD |
4345 | if (!revents) { |
4346 | /* No activity for this FD (poll implementation). */ | |
4347 | continue; | |
4348 | } | |
4349 | ||
5eb91c98 | 4350 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 4351 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 4352 | if (ret) { |
139ac872 MD |
4353 | err = 0; |
4354 | goto exit; | |
5eb91c98 DG |
4355 | } |
4356 | ||
4357 | /* Event on the registration socket */ | |
4358 | if (pollfd == client_sock) { | |
03e43155 MD |
4359 | if (revents & LPOLLIN) { |
4360 | continue; | |
4361 | } else if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
5eb91c98 DG |
4362 | ERR("Client socket poll error"); |
4363 | goto error; | |
03e43155 MD |
4364 | } else { |
4365 | ERR("Unexpected poll events %u for sock %d", revents, pollfd); | |
4366 | goto error; | |
5eb91c98 DG |
4367 | } |
4368 | } | |
4369 | } | |
4370 | ||
4371 | DBG("Wait for client response"); | |
4372 | ||
840cb59c | 4373 | health_code_update(); |
44a5e5eb | 4374 | |
5eb91c98 DG |
4375 | sock = lttcomm_accept_unix_sock(client_sock); |
4376 | if (sock < 0) { | |
273ea72c | 4377 | goto error; |
273ea72c DG |
4378 | } |
4379 | ||
b662582b DG |
4380 | /* |
4381 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4382 | * show must go on. | |
4383 | */ | |
4384 | (void) utils_set_fd_cloexec(sock); | |
4385 | ||
be040666 DG |
4386 | /* Set socket option for credentials retrieval */ |
4387 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
4388 | if (ret < 0) { | |
4389 | goto error; | |
4390 | } | |
4391 | ||
5eb91c98 | 4392 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 4393 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 4394 | if (cmd_ctx == NULL) { |
76d7553f | 4395 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 4396 | goto error; |
5eb91c98 | 4397 | } |
1d4b027a | 4398 | |
5eb91c98 | 4399 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 4400 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 4401 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 4402 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
4403 | goto error; |
4404 | } | |
1d4b027a | 4405 | |
5eb91c98 DG |
4406 | cmd_ctx->llm = NULL; |
4407 | cmd_ctx->session = NULL; | |
1d4b027a | 4408 | |
840cb59c | 4409 | health_code_update(); |
44a5e5eb | 4410 | |
5eb91c98 DG |
4411 | /* |
4412 | * Data is received from the lttng client. The struct | |
4413 | * lttcomm_session_msg (lsm) contains the command and data request of | |
4414 | * the client. | |
4415 | */ | |
4416 | DBG("Receiving data from client ..."); | |
be040666 DG |
4417 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
4418 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
4419 | if (ret <= 0) { |
4420 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
4421 | ret = close(sock); |
4422 | if (ret) { | |
4423 | PERROR("close"); | |
4424 | } | |
4425 | sock = -1; | |
a2c0da86 | 4426 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4427 | continue; |
4428 | } | |
1d4b027a | 4429 | |
840cb59c | 4430 | health_code_update(); |
44a5e5eb | 4431 | |
5eb91c98 DG |
4432 | // TODO: Validate cmd_ctx including sanity check for |
4433 | // security purpose. | |
f7776ea7 | 4434 | |
f6a9efaa | 4435 | rcu_thread_online(); |
5eb91c98 DG |
4436 | /* |
4437 | * This function dispatch the work to the kernel or userspace tracer | |
4438 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
4439 | * informations for the client. The command context struct contains | |
4440 | * everything this function may needs. | |
4441 | */ | |
53a80697 | 4442 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 4443 | rcu_thread_offline(); |
5eb91c98 | 4444 | if (ret < 0) { |
36134aa1 DG |
4445 | ret = close(sock); |
4446 | if (ret) { | |
4447 | PERROR("close"); | |
53a80697 | 4448 | } |
36134aa1 | 4449 | sock = -1; |
bbd973c2 | 4450 | /* |
5eb91c98 | 4451 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 4452 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
4453 | * (ENOMEM). Error detected but still accept |
4454 | * command, unless a socket error has been | |
4455 | * detected. | |
bbd973c2 | 4456 | */ |
bbd973c2 | 4457 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
4458 | continue; |
4459 | } | |
d6e4fca4 | 4460 | |
840cb59c | 4461 | health_code_update(); |
44a5e5eb | 4462 | |
a1ac8b97 | 4463 | DBG("Sending response (size: %d, retcode: %s (%d))", |
54d01ffb | 4464 | cmd_ctx->lttng_msg_size, |
a1ac8b97 JG |
4465 | lttng_strerror(-cmd_ctx->llm->ret_code), |
4466 | cmd_ctx->llm->ret_code); | |
54d01ffb | 4467 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
4468 | if (ret < 0) { |
4469 | ERR("Failed to send data back to client"); | |
bbd973c2 | 4470 | } |
1d4b027a | 4471 | |
5eb91c98 | 4472 | /* End of transmission */ |
76d7553f MD |
4473 | ret = close(sock); |
4474 | if (ret) { | |
4475 | PERROR("close"); | |
4476 | } | |
4477 | sock = -1; | |
be040666 DG |
4478 | |
4479 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 4480 | |
840cb59c | 4481 | health_code_update(); |
273ea72c DG |
4482 | } |
4483 | ||
139ac872 | 4484 | exit: |
5eb91c98 | 4485 | error: |
35df2755 CB |
4486 | if (sock >= 0) { |
4487 | ret = close(sock); | |
4488 | if (ret) { | |
4489 | PERROR("close"); | |
4490 | } | |
139ac872 | 4491 | } |
44a5e5eb | 4492 | |
35df2755 CB |
4493 | lttng_poll_clean(&events); |
4494 | clean_command_ctx(&cmd_ctx); | |
4495 | ||
4496 | error_listen: | |
4497 | error_create_poll: | |
e6142f2e | 4498 | unlink(config.client_unix_sock_path.value); |
76d7553f MD |
4499 | if (client_sock >= 0) { |
4500 | ret = close(client_sock); | |
4501 | if (ret) { | |
4502 | PERROR("close"); | |
4503 | } | |
a4b35e07 | 4504 | } |
35df2755 CB |
4505 | |
4506 | if (err) { | |
840cb59c | 4507 | health_error(); |
35df2755 | 4508 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 4509 | } |
273ea72c | 4510 | |
8782cc74 | 4511 | health_unregister(health_sessiond); |
35df2755 CB |
4512 | |
4513 | DBG("Client thread dying"); | |
f6a9efaa DG |
4514 | |
4515 | rcu_unregister_thread(); | |
4a15001e MD |
4516 | |
4517 | /* | |
4518 | * Since we are creating the consumer threads, we own them, so we need | |
4519 | * to join them before our thread exits. | |
4520 | */ | |
4521 | ret = join_consumer_thread(&kconsumer_data); | |
4522 | if (ret) { | |
4523 | errno = ret; | |
4524 | PERROR("join_consumer"); | |
4525 | } | |
4526 | ||
4527 | ret = join_consumer_thread(&ustconsumer32_data); | |
4528 | if (ret) { | |
4529 | errno = ret; | |
4530 | PERROR("join_consumer ust32"); | |
4531 | } | |
4532 | ||
4533 | ret = join_consumer_thread(&ustconsumer64_data); | |
4534 | if (ret) { | |
4535 | errno = ret; | |
4536 | PERROR("join_consumer ust64"); | |
4537 | } | |
1d4b027a DG |
4538 | return NULL; |
4539 | } | |
4540 | ||
c0232ea5 JG |
4541 | static int string_match(const char *str1, const char *str2) |
4542 | { | |
4543 | return (str1 && str2) && !strcmp(str1, str2); | |
4544 | } | |
4545 | ||
fac6795d | 4546 | /* |
26296c48 JG |
4547 | * Take an option from the getopt output and set it in the right variable to be |
4548 | * used later. | |
4549 | * | |
4550 | * Return 0 on success else a negative value. | |
fac6795d | 4551 | */ |
26296c48 | 4552 | static int set_option(int opt, const char *arg, const char *optname) |
fac6795d | 4553 | { |
26296c48 | 4554 | int ret = 0; |
fac6795d | 4555 | |
c0232ea5 | 4556 | if (string_match(optname, "client-sock") || opt == 'c') { |
66b2ce8e JG |
4557 | if (!arg || *arg == '\0') { |
4558 | ret = -EINVAL; | |
4559 | goto end; | |
4560 | } | |
e8fa9fb0 MD |
4561 | if (lttng_is_setuid_setgid()) { |
4562 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4563 | "-c, --client-sock"); | |
4564 | } else { | |
e6142f2e JG |
4565 | config_string_set(&config.client_unix_sock_path, |
4566 | strdup(arg)); | |
4567 | if (!config.client_unix_sock_path.value) { | |
4568 | ret = -ENOMEM; | |
4569 | PERROR("strdup"); | |
4570 | } | |
e8fa9fb0 | 4571 | } |
c0232ea5 | 4572 | } else if (string_match(optname, "apps-sock") || opt == 'a') { |
66b2ce8e JG |
4573 | if (!arg || *arg == '\0') { |
4574 | ret = -EINVAL; | |
4575 | goto end; | |
4576 | } | |
e8fa9fb0 MD |
4577 | if (lttng_is_setuid_setgid()) { |
4578 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4579 | "-a, --apps-sock"); | |
4580 | } else { | |
e6142f2e JG |
4581 | config_string_set(&config.apps_unix_sock_path, |
4582 | strdup(arg)); | |
4583 | if (!config.apps_unix_sock_path.value) { | |
4584 | ret = -ENOMEM; | |
4585 | PERROR("strdup"); | |
4586 | } | |
e8fa9fb0 | 4587 | } |
c0232ea5 | 4588 | } else if (string_match(optname, "daemonize") || opt == 'd') { |
e6142f2e | 4589 | config.daemonize = true; |
c0232ea5 | 4590 | } else if (string_match(optname, "background") || opt == 'b') { |
e6142f2e | 4591 | config.background = true; |
c0232ea5 | 4592 | } else if (string_match(optname, "group") || opt == 'g') { |
66b2ce8e JG |
4593 | if (!arg || *arg == '\0') { |
4594 | ret = -EINVAL; | |
4595 | goto end; | |
4596 | } | |
e8fa9fb0 MD |
4597 | if (lttng_is_setuid_setgid()) { |
4598 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4599 | "-g, --group"); | |
4600 | } else { | |
e6142f2e JG |
4601 | config_string_set(&config.tracing_group_name, |
4602 | strdup(arg)); | |
4603 | if (!config.tracing_group_name.value) { | |
e8fa9fb0 | 4604 | ret = -ENOMEM; |
e6142f2e | 4605 | PERROR("strdup"); |
e8fa9fb0 | 4606 | } |
db322c4d | 4607 | } |
c0232ea5 | 4608 | } else if (string_match(optname, "help") || opt == 'h') { |
4fc83d94 | 4609 | ret = utils_show_help(8, "lttng-sessiond", help_msg); |
8190767e | 4610 | if (ret) { |
4fc83d94 | 4611 | ERR("Cannot show --help for `lttng-sessiond`"); |
8190767e PP |
4612 | perror("exec"); |
4613 | } | |
4614 | exit(ret ? EXIT_FAILURE : EXIT_SUCCESS); | |
c0232ea5 | 4615 | } else if (string_match(optname, "version") || opt == 'V') { |
26296c48 JG |
4616 | fprintf(stdout, "%s\n", VERSION); |
4617 | exit(EXIT_SUCCESS); | |
c0232ea5 | 4618 | } else if (string_match(optname, "sig-parent") || opt == 'S') { |
e6142f2e | 4619 | config.sig_parent = true; |
c0232ea5 | 4620 | } else if (string_match(optname, "kconsumerd-err-sock")) { |
66b2ce8e JG |
4621 | if (!arg || *arg == '\0') { |
4622 | ret = -EINVAL; | |
4623 | goto end; | |
4624 | } | |
e8fa9fb0 MD |
4625 | if (lttng_is_setuid_setgid()) { |
4626 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4627 | "--kconsumerd-err-sock"); | |
4628 | } else { | |
e6142f2e JG |
4629 | config_string_set(&config.kconsumerd_err_unix_sock_path, |
4630 | strdup(arg)); | |
4631 | if (!config.kconsumerd_err_unix_sock_path.value) { | |
4632 | ret = -ENOMEM; | |
4633 | PERROR("strdup"); | |
4634 | } | |
e8fa9fb0 | 4635 | } |
c0232ea5 | 4636 | } else if (string_match(optname, "kconsumerd-cmd-sock")) { |
66b2ce8e JG |
4637 | if (!arg || *arg == '\0') { |
4638 | ret = -EINVAL; | |
4639 | goto end; | |
4640 | } | |
e8fa9fb0 MD |
4641 | if (lttng_is_setuid_setgid()) { |
4642 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4643 | "--kconsumerd-cmd-sock"); | |
4644 | } else { | |
e6142f2e JG |
4645 | config_string_set(&config.kconsumerd_cmd_unix_sock_path, |
4646 | strdup(arg)); | |
4647 | if (!config.kconsumerd_cmd_unix_sock_path.value) { | |
4648 | ret = -ENOMEM; | |
4649 | PERROR("strdup"); | |
4650 | } | |
e8fa9fb0 | 4651 | } |
c0232ea5 | 4652 | } else if (string_match(optname, "ustconsumerd64-err-sock")) { |
66b2ce8e JG |
4653 | if (!arg || *arg == '\0') { |
4654 | ret = -EINVAL; | |
4655 | goto end; | |
4656 | } | |
e8fa9fb0 MD |
4657 | if (lttng_is_setuid_setgid()) { |
4658 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4659 | "--ustconsumerd64-err-sock"); | |
4660 | } else { | |
e6142f2e JG |
4661 | config_string_set(&config.consumerd64_err_unix_sock_path, |
4662 | strdup(arg)); | |
4663 | if (!config.consumerd64_err_unix_sock_path.value) { | |
4664 | ret = -ENOMEM; | |
4665 | PERROR("strdup"); | |
4666 | } | |
e8fa9fb0 | 4667 | } |
c0232ea5 | 4668 | } else if (string_match(optname, "ustconsumerd64-cmd-sock")) { |
66b2ce8e JG |
4669 | if (!arg || *arg == '\0') { |
4670 | ret = -EINVAL; | |
4671 | goto end; | |
4672 | } | |
e8fa9fb0 MD |
4673 | if (lttng_is_setuid_setgid()) { |
4674 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4675 | "--ustconsumerd64-cmd-sock"); | |
4676 | } else { | |
e6142f2e JG |
4677 | config_string_set(&config.consumerd64_cmd_unix_sock_path, |
4678 | strdup(arg)); | |
4679 | if (!config.consumerd64_cmd_unix_sock_path.value) { | |
4680 | ret = -ENOMEM; | |
4681 | PERROR("strdup"); | |
4682 | } | |
e8fa9fb0 | 4683 | } |
c0232ea5 | 4684 | } else if (string_match(optname, "ustconsumerd32-err-sock")) { |
66b2ce8e JG |
4685 | if (!arg || *arg == '\0') { |
4686 | ret = -EINVAL; | |
4687 | goto end; | |
4688 | } | |
e8fa9fb0 MD |
4689 | if (lttng_is_setuid_setgid()) { |
4690 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4691 | "--ustconsumerd32-err-sock"); | |
4692 | } else { | |
e6142f2e JG |
4693 | config_string_set(&config.consumerd32_err_unix_sock_path, |
4694 | strdup(arg)); | |
4695 | if (!config.consumerd32_err_unix_sock_path.value) { | |
4696 | ret = -ENOMEM; | |
4697 | PERROR("strdup"); | |
4698 | } | |
e8fa9fb0 | 4699 | } |
c0232ea5 | 4700 | } else if (string_match(optname, "ustconsumerd32-cmd-sock")) { |
66b2ce8e JG |
4701 | if (!arg || *arg == '\0') { |
4702 | ret = -EINVAL; | |
4703 | goto end; | |
4704 | } | |
e8fa9fb0 MD |
4705 | if (lttng_is_setuid_setgid()) { |
4706 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4707 | "--ustconsumerd32-cmd-sock"); | |
4708 | } else { | |
e6142f2e JG |
4709 | config_string_set(&config.consumerd32_cmd_unix_sock_path, |
4710 | strdup(arg)); | |
4711 | if (!config.consumerd32_cmd_unix_sock_path.value) { | |
4712 | ret = -ENOMEM; | |
4713 | PERROR("strdup"); | |
4714 | } | |
e8fa9fb0 | 4715 | } |
c0232ea5 | 4716 | } else if (string_match(optname, "no-kernel")) { |
e6142f2e | 4717 | config.no_kernel = true; |
c0232ea5 | 4718 | } else if (string_match(optname, "quiet") || opt == 'q') { |
e6142f2e | 4719 | lttng_opt_quiet = true; |
c0232ea5 | 4720 | } else if (string_match(optname, "verbose") || opt == 'v') { |
26296c48 JG |
4721 | /* Verbose level can increase using multiple -v */ |
4722 | if (arg) { | |
13755a18 | 4723 | /* Value obtained from config file */ |
e6142f2e | 4724 | config.verbose = config_parse_value(arg); |
26296c48 | 4725 | } else { |
13755a18 | 4726 | /* -v used on command line */ |
e6142f2e | 4727 | config.verbose++; |
26296c48 | 4728 | } |
13755a18 | 4729 | /* Clamp value to [0, 3] */ |
e6142f2e JG |
4730 | config.verbose = config.verbose < 0 ? 0 : |
4731 | (config.verbose <= 3 ? config.verbose : 3); | |
c0232ea5 | 4732 | } else if (string_match(optname, "verbose-consumer")) { |
26296c48 | 4733 | if (arg) { |
e6142f2e | 4734 | config.verbose_consumer = config_parse_value(arg); |
26296c48 | 4735 | } else { |
e6142f2e | 4736 | config.verbose_consumer++; |
26296c48 | 4737 | } |
c0232ea5 | 4738 | } else if (string_match(optname, "consumerd32-path")) { |
66b2ce8e JG |
4739 | if (!arg || *arg == '\0') { |
4740 | ret = -EINVAL; | |
4741 | goto end; | |
4742 | } | |
e8fa9fb0 MD |
4743 | if (lttng_is_setuid_setgid()) { |
4744 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4745 | "--consumerd32-path"); | |
4746 | } else { | |
e6142f2e JG |
4747 | config_string_set(&config.consumerd32_bin_path, |
4748 | strdup(arg)); | |
4749 | if (!config.consumerd32_bin_path.value) { | |
e8fa9fb0 MD |
4750 | PERROR("strdup"); |
4751 | ret = -ENOMEM; | |
4752 | } | |
db322c4d | 4753 | } |
c0232ea5 | 4754 | } else if (string_match(optname, "consumerd32-libdir")) { |
66b2ce8e JG |
4755 | if (!arg || *arg == '\0') { |
4756 | ret = -EINVAL; | |
4757 | goto end; | |
4758 | } | |
e8fa9fb0 MD |
4759 | if (lttng_is_setuid_setgid()) { |
4760 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4761 | "--consumerd32-libdir"); | |
4762 | } else { | |
e6142f2e JG |
4763 | config_string_set(&config.consumerd32_lib_dir, |
4764 | strdup(arg)); | |
4765 | if (!config.consumerd32_lib_dir.value) { | |
e8fa9fb0 MD |
4766 | PERROR("strdup"); |
4767 | ret = -ENOMEM; | |
4768 | } | |
db322c4d | 4769 | } |
c0232ea5 | 4770 | } else if (string_match(optname, "consumerd64-path")) { |
66b2ce8e JG |
4771 | if (!arg || *arg == '\0') { |
4772 | ret = -EINVAL; | |
4773 | goto end; | |
4774 | } | |
e8fa9fb0 MD |
4775 | if (lttng_is_setuid_setgid()) { |
4776 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4777 | "--consumerd64-path"); | |
4778 | } else { | |
e6142f2e JG |
4779 | config_string_set(&config.consumerd64_bin_path, |
4780 | strdup(arg)); | |
4781 | if (!config.consumerd64_bin_path.value) { | |
e8fa9fb0 MD |
4782 | PERROR("strdup"); |
4783 | ret = -ENOMEM; | |
4784 | } | |
db322c4d | 4785 | } |
c0232ea5 | 4786 | } else if (string_match(optname, "consumerd64-libdir")) { |
66b2ce8e JG |
4787 | if (!arg || *arg == '\0') { |
4788 | ret = -EINVAL; | |
4789 | goto end; | |
4790 | } | |
e8fa9fb0 MD |
4791 | if (lttng_is_setuid_setgid()) { |
4792 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4793 | "--consumerd64-libdir"); | |
4794 | } else { | |
e6142f2e JG |
4795 | config_string_set(&config.consumerd64_lib_dir, |
4796 | strdup(arg)); | |
4797 | if (!config.consumerd64_lib_dir.value) { | |
e8fa9fb0 MD |
4798 | PERROR("strdup"); |
4799 | ret = -ENOMEM; | |
4800 | } | |
db322c4d | 4801 | } |
c0232ea5 | 4802 | } else if (string_match(optname, "pidfile") || opt == 'p') { |
66b2ce8e JG |
4803 | if (!arg || *arg == '\0') { |
4804 | ret = -EINVAL; | |
4805 | goto end; | |
4806 | } | |
e8fa9fb0 MD |
4807 | if (lttng_is_setuid_setgid()) { |
4808 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4809 | "-p, --pidfile"); | |
4810 | } else { | |
e6142f2e JG |
4811 | config_string_set(&config.pid_file_path, strdup(arg)); |
4812 | if (!config.pid_file_path.value) { | |
e8fa9fb0 MD |
4813 | PERROR("strdup"); |
4814 | ret = -ENOMEM; | |
4815 | } | |
db322c4d | 4816 | } |
c0232ea5 | 4817 | } else if (string_match(optname, "agent-tcp-port")) { |
66b2ce8e JG |
4818 | if (!arg || *arg == '\0') { |
4819 | ret = -EINVAL; | |
4820 | goto end; | |
4821 | } | |
e8fa9fb0 MD |
4822 | if (lttng_is_setuid_setgid()) { |
4823 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4824 | "--agent-tcp-port"); | |
4825 | } else { | |
4826 | unsigned long v; | |
4d076222 | 4827 | |
e8fa9fb0 MD |
4828 | errno = 0; |
4829 | v = strtoul(arg, NULL, 0); | |
4830 | if (errno != 0 || !isdigit(arg[0])) { | |
4831 | ERR("Wrong value in --agent-tcp-port parameter: %s", arg); | |
4832 | return -1; | |
4833 | } | |
4834 | if (v == 0 || v >= 65535) { | |
4835 | ERR("Port overflow in --agent-tcp-port parameter: %s", arg); | |
4836 | return -1; | |
4837 | } | |
e6142f2e JG |
4838 | config.agent_tcp_port = (uint32_t) v; |
4839 | DBG3("Agent TCP port set to non default: %u", config.agent_tcp_port); | |
26296c48 | 4840 | } |
c0232ea5 | 4841 | } else if (string_match(optname, "load") || opt == 'l') { |
66b2ce8e JG |
4842 | if (!arg || *arg == '\0') { |
4843 | ret = -EINVAL; | |
4844 | goto end; | |
4845 | } | |
e8fa9fb0 MD |
4846 | if (lttng_is_setuid_setgid()) { |
4847 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4848 | "-l, --load"); | |
4849 | } else { | |
e6142f2e JG |
4850 | config_string_set(&config.load_session_path, strdup(arg)); |
4851 | if (!config.load_session_path.value) { | |
e8fa9fb0 MD |
4852 | PERROR("strdup"); |
4853 | ret = -ENOMEM; | |
4854 | } | |
ef367a93 | 4855 | } |
c0232ea5 | 4856 | } else if (string_match(optname, "kmod-probes")) { |
66b2ce8e JG |
4857 | if (!arg || *arg == '\0') { |
4858 | ret = -EINVAL; | |
4859 | goto end; | |
4860 | } | |
e8fa9fb0 MD |
4861 | if (lttng_is_setuid_setgid()) { |
4862 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4863 | "--kmod-probes"); | |
4864 | } else { | |
e6142f2e JG |
4865 | config_string_set(&config.kmod_probes_list, strdup(arg)); |
4866 | if (!config.kmod_probes_list.value) { | |
e8fa9fb0 MD |
4867 | PERROR("strdup"); |
4868 | ret = -ENOMEM; | |
4869 | } | |
c9d42407 | 4870 | } |
c0232ea5 | 4871 | } else if (string_match(optname, "extra-kmod-probes")) { |
66b2ce8e JG |
4872 | if (!arg || *arg == '\0') { |
4873 | ret = -EINVAL; | |
4874 | goto end; | |
4875 | } | |
e8fa9fb0 MD |
4876 | if (lttng_is_setuid_setgid()) { |
4877 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
4878 | "--extra-kmod-probes"); | |
4879 | } else { | |
e6142f2e JG |
4880 | config_string_set(&config.kmod_extra_probes_list, |
4881 | strdup(arg)); | |
4882 | if (!config.kmod_extra_probes_list.value) { | |
e8fa9fb0 MD |
4883 | PERROR("strdup"); |
4884 | ret = -ENOMEM; | |
4885 | } | |
db322c4d | 4886 | } |
c0232ea5 JG |
4887 | } else if (string_match(optname, "config") || opt == 'f') { |
4888 | /* This is handled in set_options() thus silent skip. */ | |
4889 | goto end; | |
4890 | } else { | |
26296c48 JG |
4891 | /* Unknown option or other error. |
4892 | * Error is printed by getopt, just return */ | |
4893 | ret = -1; | |
4894 | } | |
4895 | ||
f3dd7ce7 | 4896 | end: |
c5d350b2 JG |
4897 | if (ret == -EINVAL) { |
4898 | const char *opt_name = "unknown"; | |
4899 | int i; | |
4900 | ||
4901 | for (i = 0; i < sizeof(long_options) / sizeof(struct option); | |
4902 | i++) { | |
4903 | if (opt == long_options[i].val) { | |
4904 | opt_name = long_options[i].name; | |
4905 | break; | |
4906 | } | |
4907 | } | |
4908 | ||
4909 | WARN("Invalid argument provided for option \"%s\", using default value.", | |
4910 | opt_name); | |
4911 | } | |
f3dd7ce7 | 4912 | |
26296c48 JG |
4913 | return ret; |
4914 | } | |
4915 | ||
4916 | /* | |
4917 | * config_entry_handler_cb used to handle options read from a config file. | |
f40ef1d5 | 4918 | * See config_entry_handler_cb comment in common/config/session-config.h for the |
26296c48 JG |
4919 | * return value conventions. |
4920 | */ | |
4921 | static int config_entry_handler(const struct config_entry *entry, void *unused) | |
4922 | { | |
4923 | int ret = 0, i; | |
4924 | ||
4925 | if (!entry || !entry->name || !entry->value) { | |
4926 | ret = -EINVAL; | |
4927 | goto end; | |
4928 | } | |
4929 | ||
4930 | /* Check if the option is to be ignored */ | |
4931 | for (i = 0; i < sizeof(config_ignore_options) / sizeof(char *); i++) { | |
4932 | if (!strcmp(entry->name, config_ignore_options[i])) { | |
4933 | goto end; | |
4934 | } | |
4935 | } | |
4936 | ||
4937 | for (i = 0; i < (sizeof(long_options) / sizeof(struct option)) - 1; | |
4938 | i++) { | |
4939 | ||
4940 | /* Ignore if not fully matched. */ | |
4941 | if (strcmp(entry->name, long_options[i].name)) { | |
4942 | continue; | |
4943 | } | |
4944 | ||
4945 | /* | |
4946 | * If the option takes no argument on the command line, we have to | |
4947 | * check if the value is "true". We support non-zero numeric values, | |
4948 | * true, on and yes. | |
4949 | */ | |
4950 | if (!long_options[i].has_arg) { | |
4951 | ret = config_parse_value(entry->value); | |
4952 | if (ret <= 0) { | |
4953 | if (ret) { | |
4954 | WARN("Invalid configuration value \"%s\" for option %s", | |
4955 | entry->value, entry->name); | |
4956 | } | |
4957 | /* False, skip boolean config option. */ | |
4958 | goto end; | |
4d076222 | 4959 | } |
26296c48 JG |
4960 | } |
4961 | ||
4962 | ret = set_option(long_options[i].val, entry->value, entry->name); | |
4963 | goto end; | |
4964 | } | |
4965 | ||
4966 | WARN("Unrecognized option \"%s\" in daemon configuration file.", entry->name); | |
4967 | ||
4968 | end: | |
4969 | return ret; | |
4970 | } | |
4971 | ||
4972 | /* | |
4973 | * daemon configuration loading and argument parsing | |
4974 | */ | |
4975 | static int set_options(int argc, char **argv) | |
4976 | { | |
4977 | int ret = 0, c = 0, option_index = 0; | |
4978 | int orig_optopt = optopt, orig_optind = optind; | |
4979 | char *optstring; | |
4980 | const char *config_path = NULL; | |
4981 | ||
4982 | optstring = utils_generate_optstring(long_options, | |
4983 | sizeof(long_options) / sizeof(struct option)); | |
4984 | if (!optstring) { | |
4985 | ret = -ENOMEM; | |
4986 | goto end; | |
4987 | } | |
4988 | ||
4989 | /* Check for the --config option */ | |
4990 | while ((c = getopt_long(argc, argv, optstring, long_options, | |
4991 | &option_index)) != -1) { | |
4992 | if (c == '?') { | |
4993 | ret = -EINVAL; | |
4994 | goto end; | |
4995 | } else if (c != 'f') { | |
4996 | /* if not equal to --config option. */ | |
4997 | continue; | |
4998 | } | |
4999 | ||
e8fa9fb0 MD |
5000 | if (lttng_is_setuid_setgid()) { |
5001 | WARN("Getting '%s' argument from setuid/setgid binary refused for security reasons.", | |
5002 | "-f, --config"); | |
5003 | } else { | |
5004 | config_path = utils_expand_path(optarg); | |
5005 | if (!config_path) { | |
5006 | ERR("Failed to resolve path: %s", optarg); | |
5007 | } | |
26296c48 JG |
5008 | } |
5009 | } | |
5010 | ||
5011 | ret = config_get_section_entries(config_path, config_section_name, | |
5012 | config_entry_handler, NULL); | |
5013 | if (ret) { | |
5014 | if (ret > 0) { | |
5015 | ERR("Invalid configuration option at line %i", ret); | |
5016 | ret = -1; | |
5017 | } | |
5018 | goto end; | |
5019 | } | |
5020 | ||
5021 | /* Reset getopt's global state */ | |
5022 | optopt = orig_optopt; | |
5023 | optind = orig_optind; | |
5024 | while (1) { | |
c0232ea5 JG |
5025 | option_index = -1; |
5026 | /* | |
5027 | * getopt_long() will not set option_index if it encounters a | |
5028 | * short option. | |
5029 | */ | |
5030 | c = getopt_long(argc, argv, optstring, long_options, | |
5031 | &option_index); | |
26296c48 | 5032 | if (c == -1) { |
4d076222 DG |
5033 | break; |
5034 | } | |
26296c48 | 5035 | |
c0232ea5 JG |
5036 | /* |
5037 | * Pass NULL as the long option name if popt left the index | |
5038 | * unset. | |
5039 | */ | |
5040 | ret = set_option(c, optarg, | |
5041 | option_index < 0 ? NULL : | |
5042 | long_options[option_index].name); | |
26296c48 JG |
5043 | if (ret < 0) { |
5044 | break; | |
fac6795d DG |
5045 | } |
5046 | } | |
5047 | ||
26296c48 JG |
5048 | end: |
5049 | free(optstring); | |
5050 | return ret; | |
fac6795d DG |
5051 | } |
5052 | ||
5053 | /* | |
d063d709 | 5054 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
5055 | * apps_sock - The communication socket for all UST apps. |
5056 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 5057 | */ |
cf3af59e | 5058 | static int init_daemon_socket(void) |
fac6795d DG |
5059 | { |
5060 | int ret = 0; | |
5061 | mode_t old_umask; | |
5062 | ||
5063 | old_umask = umask(0); | |
5064 | ||
5065 | /* Create client tool unix socket */ | |
e6142f2e | 5066 | client_sock = lttcomm_create_unix_sock(config.client_unix_sock_path.value); |
d6f42150 | 5067 | if (client_sock < 0) { |
e6142f2e | 5068 | ERR("Create unix sock failed: %s", config.client_unix_sock_path.value); |
fac6795d DG |
5069 | ret = -1; |
5070 | goto end; | |
5071 | } | |
5072 | ||
b662582b DG |
5073 | /* Set the cloexec flag */ |
5074 | ret = utils_set_fd_cloexec(client_sock); | |
5075 | if (ret < 0) { | |
5076 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
5077 | "Continuing but note that the consumer daemon will have a " | |
5078 | "reference to this socket on exec()", client_sock); | |
5079 | } | |
5080 | ||
fac6795d | 5081 | /* File permission MUST be 660 */ |
e6142f2e | 5082 | ret = chmod(config.client_unix_sock_path.value, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
fac6795d | 5083 | if (ret < 0) { |
e6142f2e | 5084 | ERR("Set file permissions failed: %s", config.client_unix_sock_path.value); |
76d7553f | 5085 | PERROR("chmod"); |
fac6795d DG |
5086 | goto end; |
5087 | } | |
5088 | ||
5089 | /* Create the application unix socket */ | |
e6142f2e | 5090 | apps_sock = lttcomm_create_unix_sock(config.apps_unix_sock_path.value); |
d6f42150 | 5091 | if (apps_sock < 0) { |
e6142f2e | 5092 | ERR("Create unix sock failed: %s", config.apps_unix_sock_path.value); |
fac6795d DG |
5093 | ret = -1; |
5094 | goto end; | |
5095 | } | |
5096 | ||
b662582b DG |
5097 | /* Set the cloexec flag */ |
5098 | ret = utils_set_fd_cloexec(apps_sock); | |
5099 | if (ret < 0) { | |
5100 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
5101 | "Continuing but note that the consumer daemon will have a " | |
5102 | "reference to this socket on exec()", apps_sock); | |
5103 | } | |
5104 | ||
d6f42150 | 5105 | /* File permission MUST be 666 */ |
e6142f2e | 5106 | ret = chmod(config.apps_unix_sock_path.value, |
54d01ffb | 5107 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); |
fac6795d | 5108 | if (ret < 0) { |
e6142f2e | 5109 | ERR("Set file permissions failed: %s", config.apps_unix_sock_path.value); |
76d7553f | 5110 | PERROR("chmod"); |
fac6795d DG |
5111 | goto end; |
5112 | } | |
5113 | ||
b662582b DG |
5114 | DBG3("Session daemon client socket %d and application socket %d created", |
5115 | client_sock, apps_sock); | |
5116 | ||
fac6795d DG |
5117 | end: |
5118 | umask(old_umask); | |
5119 | return ret; | |
5120 | } | |
5121 | ||
5122 | /* | |
54d01ffb DG |
5123 | * Check if the global socket is available, and if a daemon is answering at the |
5124 | * other side. If yes, error is returned. | |
fac6795d | 5125 | */ |
cf3af59e | 5126 | static int check_existing_daemon(void) |
fac6795d | 5127 | { |
7d8234d9 | 5128 | /* Is there anybody out there ? */ |
099e26bd | 5129 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 5130 | return -EEXIST; |
099e26bd | 5131 | } |
b09c7c76 DG |
5132 | |
5133 | return 0; | |
fac6795d DG |
5134 | } |
5135 | ||
fac6795d | 5136 | /* |
d063d709 | 5137 | * Set the tracing group gid onto the client socket. |
5e16da05 | 5138 | * |
d063d709 | 5139 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 5140 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 5141 | */ |
be040666 | 5142 | static int set_permissions(char *rundir) |
fac6795d DG |
5143 | { |
5144 | int ret; | |
996b65c8 | 5145 | gid_t gid; |
fac6795d | 5146 | |
e6142f2e | 5147 | gid = utils_get_group_id(config.tracing_group_name.value); |
fac6795d | 5148 | |
d6f42150 | 5149 | /* Set lttng run dir */ |
be040666 | 5150 | ret = chown(rundir, 0, gid); |
d6f42150 | 5151 | if (ret < 0) { |
be040666 | 5152 | ERR("Unable to set group on %s", rundir); |
76d7553f | 5153 | PERROR("chown"); |
d6f42150 DG |
5154 | } |
5155 | ||
6c71277b MD |
5156 | /* |
5157 | * Ensure all applications and tracing group can search the run | |
5158 | * dir. Allow everyone to read the directory, since it does not | |
5159 | * buy us anything to hide its content. | |
5160 | */ | |
5161 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
5162 | if (ret < 0) { |
5163 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 5164 | PERROR("chmod"); |
d1613cf5 JN |
5165 | } |
5166 | ||
d6f42150 | 5167 | /* lttng client socket path */ |
e6142f2e | 5168 | ret = chown(config.client_unix_sock_path.value, 0, gid); |
fac6795d | 5169 | if (ret < 0) { |
e6142f2e | 5170 | ERR("Unable to set group on %s", config.client_unix_sock_path.value); |
76d7553f | 5171 | PERROR("chown"); |
d6f42150 DG |
5172 | } |
5173 | ||
3bd1e081 | 5174 | /* kconsumer error socket path */ |
6c71277b | 5175 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 5176 | if (ret < 0) { |
3bd1e081 | 5177 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 5178 | PERROR("chown"); |
3bd1e081 MD |
5179 | } |
5180 | ||
7753dea8 | 5181 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 5182 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
5183 | if (ret < 0) { |
5184 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 5185 | PERROR("chown"); |
7753dea8 MD |
5186 | } |
5187 | ||
5188 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 5189 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 5190 | if (ret < 0) { |
7753dea8 | 5191 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 5192 | PERROR("chown"); |
fac6795d DG |
5193 | } |
5194 | ||
d6f42150 | 5195 | DBG("All permissions are set"); |
e07ae692 | 5196 | |
fac6795d DG |
5197 | return ret; |
5198 | } | |
5199 | ||
d6f42150 | 5200 | /* |
d063d709 | 5201 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 5202 | */ |
e6142f2e | 5203 | static int create_lttng_rundir(void) |
d6f42150 DG |
5204 | { |
5205 | int ret; | |
5206 | ||
e6142f2e | 5207 | DBG3("Creating LTTng run directory: %s", config.rundir.value); |
67e40797 | 5208 | |
e6142f2e | 5209 | ret = mkdir(config.rundir.value, S_IRWXU); |
d6f42150 | 5210 | if (ret < 0) { |
b1f11e69 | 5211 | if (errno != EEXIST) { |
e6142f2e | 5212 | ERR("Unable to create %s", config.rundir.value); |
b1f11e69 DG |
5213 | goto error; |
5214 | } else { | |
5215 | ret = 0; | |
5216 | } | |
d6f42150 DG |
5217 | } |
5218 | ||
5219 | error: | |
5220 | return ret; | |
5221 | } | |
5222 | ||
5223 | /* | |
e6142f2e | 5224 | * Setup sockets and directory needed by the consumerds' communication with the |
d063d709 | 5225 | * session daemon. |
d6f42150 | 5226 | */ |
e6142f2e | 5227 | static int set_consumer_sockets(struct consumer_data *consumer_data) |
d6f42150 DG |
5228 | { |
5229 | int ret; | |
e6142f2e | 5230 | char *path = NULL; |
d6f42150 | 5231 | |
6c71277b | 5232 | switch (consumer_data->type) { |
7753dea8 | 5233 | case LTTNG_CONSUMER_KERNEL: |
e6142f2e | 5234 | path = config.kconsumerd_path.value; |
7753dea8 MD |
5235 | break; |
5236 | case LTTNG_CONSUMER64_UST: | |
e6142f2e | 5237 | path = config.consumerd64_path.value; |
7753dea8 MD |
5238 | break; |
5239 | case LTTNG_CONSUMER32_UST: | |
e6142f2e | 5240 | path = config.consumerd32_path.value; |
7753dea8 MD |
5241 | break; |
5242 | default: | |
5243 | ERR("Consumer type unknown"); | |
5244 | ret = -EINVAL; | |
5245 | goto error; | |
d6f42150 | 5246 | } |
e6142f2e | 5247 | assert(path); |
d6f42150 | 5248 | |
67e40797 DG |
5249 | DBG2("Creating consumer directory: %s", path); |
5250 | ||
6c71277b | 5251 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
e7e1ef17 JR |
5252 | if (ret < 0 && errno != EEXIST) { |
5253 | PERROR("mkdir"); | |
5254 | ERR("Failed to create %s", path); | |
5255 | goto error; | |
d6f42150 | 5256 | } |
6c71277b | 5257 | if (is_root) { |
e6142f2e | 5258 | ret = chown(path, 0, utils_get_group_id(config.tracing_group_name.value)); |
6c71277b MD |
5259 | if (ret < 0) { |
5260 | ERR("Unable to set group on %s", path); | |
5261 | PERROR("chown"); | |
5262 | goto error; | |
5263 | } | |
5264 | } | |
d6f42150 | 5265 | |
e6142f2e | 5266 | /* Create the consumerd error unix socket */ |
3bd1e081 MD |
5267 | consumer_data->err_sock = |
5268 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
5269 | if (consumer_data->err_sock < 0) { | |
5270 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
5271 | ret = -1; |
5272 | goto error; | |
5273 | } | |
5274 | ||
a24f05ab MD |
5275 | /* |
5276 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
5277 | * show must go on. | |
5278 | */ | |
5279 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
5280 | if (ret < 0) { | |
5281 | PERROR("utils_set_fd_cloexec"); | |
5282 | /* continue anyway */ | |
5283 | } | |
5284 | ||
d6f42150 | 5285 | /* File permission MUST be 660 */ |
3bd1e081 | 5286 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 5287 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 5288 | if (ret < 0) { |
3bd1e081 | 5289 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 5290 | PERROR("chmod"); |
d6f42150 DG |
5291 | goto error; |
5292 | } | |
5293 | ||
5294 | error: | |
5295 | return ret; | |
5296 | } | |
5297 | ||
fac6795d | 5298 | /* |
d063d709 | 5299 | * Signal handler for the daemon |
cf3af59e | 5300 | * |
54d01ffb DG |
5301 | * Simply stop all worker threads, leaving main() return gracefully after |
5302 | * joining all threads and calling cleanup(). | |
fac6795d DG |
5303 | */ |
5304 | static void sighandler(int sig) | |
5305 | { | |
5306 | switch (sig) { | |
cf3af59e | 5307 | case SIGINT: |
af87c45a | 5308 | DBG("SIGINT caught"); |
cf3af59e MD |
5309 | stop_threads(); |
5310 | break; | |
5311 | case SIGTERM: | |
af87c45a | 5312 | DBG("SIGTERM caught"); |
cf3af59e MD |
5313 | stop_threads(); |
5314 | break; | |
0bb7724a DG |
5315 | case SIGUSR1: |
5316 | CMM_STORE_SHARED(recv_child_signal, 1); | |
5317 | break; | |
cf3af59e MD |
5318 | default: |
5319 | break; | |
fac6795d | 5320 | } |
fac6795d DG |
5321 | } |
5322 | ||
5323 | /* | |
d063d709 | 5324 | * Setup signal handler for : |
1d4b027a | 5325 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 5326 | */ |
1d4b027a | 5327 | static int set_signal_handler(void) |
fac6795d | 5328 | { |
1d4b027a DG |
5329 | int ret = 0; |
5330 | struct sigaction sa; | |
5331 | sigset_t sigset; | |
fac6795d | 5332 | |
1d4b027a | 5333 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 5334 | PERROR("sigemptyset"); |
1d4b027a DG |
5335 | return ret; |
5336 | } | |
d6f42150 | 5337 | |
1d4b027a DG |
5338 | sa.sa_mask = sigset; |
5339 | sa.sa_flags = 0; | |
0072e5e2 MD |
5340 | |
5341 | sa.sa_handler = sighandler; | |
1d4b027a | 5342 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { |
76d7553f | 5343 | PERROR("sigaction"); |
1d4b027a | 5344 | return ret; |
d6f42150 DG |
5345 | } |
5346 | ||
1d4b027a | 5347 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 5348 | PERROR("sigaction"); |
1d4b027a | 5349 | return ret; |
d6f42150 | 5350 | } |
aaf26714 | 5351 | |
0072e5e2 | 5352 | if ((ret = sigaction(SIGUSR1, &sa, NULL)) < 0) { |
76d7553f | 5353 | PERROR("sigaction"); |
1d4b027a | 5354 | return ret; |
8c0faa1d DG |
5355 | } |
5356 | ||
0072e5e2 MD |
5357 | sa.sa_handler = SIG_IGN; |
5358 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { | |
0bb7724a DG |
5359 | PERROR("sigaction"); |
5360 | return ret; | |
5361 | } | |
5362 | ||
5363 | DBG("Signal handler set for SIGTERM, SIGUSR1, SIGPIPE and SIGINT"); | |
1d4b027a DG |
5364 | |
5365 | return ret; | |
fac6795d DG |
5366 | } |
5367 | ||
f3ed775e | 5368 | /* |
d063d709 | 5369 | * Set open files limit to unlimited. This daemon can open a large number of |
514bb9f0 | 5370 | * file descriptors in order to consume multiple kernel traces. |
f3ed775e DG |
5371 | */ |
5372 | static void set_ulimit(void) | |
5373 | { | |
5374 | int ret; | |
5375 | struct rlimit lim; | |
5376 | ||
514bb9f0 | 5377 | /* The kernel does not allow an infinite limit for open files */ |
f3ed775e DG |
5378 | lim.rlim_cur = 65535; |
5379 | lim.rlim_max = 65535; | |
5380 | ||
5381 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
5382 | if (ret < 0) { | |
76d7553f | 5383 | PERROR("failed to set open files limit"); |
f3ed775e DG |
5384 | } |
5385 | } | |
5386 | ||
4a15001e | 5387 | static int write_pidfile(void) |
35f90c40 | 5388 | { |
e6142f2e | 5389 | return utils_create_pid_file(getpid(), config.pid_file_path.value); |
35f90c40 DG |
5390 | } |
5391 | ||
c9cb3e7d JG |
5392 | /* |
5393 | * Create lockfile using the rundir and return its fd. | |
5394 | */ | |
5395 | static int create_lockfile(void) | |
5396 | { | |
e6142f2e | 5397 | return utils_create_lock_file(config.lock_file_path.value); |
c9cb3e7d JG |
5398 | } |
5399 | ||
cd9290dd | 5400 | /* |
022d91ba | 5401 | * Write agent TCP port using the rundir. |
cd9290dd | 5402 | */ |
4a15001e | 5403 | static int write_agent_port(void) |
cd9290dd | 5404 | { |
e6142f2e JG |
5405 | return utils_create_pid_file(config.agent_tcp_port, |
5406 | config.agent_port_file_path.value); | |
5407 | } | |
cd9290dd | 5408 | |
e6142f2e JG |
5409 | static int set_clock_plugin_env(void) |
5410 | { | |
5411 | int ret = 0; | |
5412 | char *env_value = NULL; | |
cd9290dd | 5413 | |
e6142f2e JG |
5414 | if (!config.lttng_ust_clock_plugin.value) { |
5415 | goto end; | |
5416 | } | |
5417 | ||
5418 | ret = asprintf(&env_value, "LTTNG_UST_CLOCK_PLUGIN=%s", | |
5419 | config.lttng_ust_clock_plugin.value); | |
cd9290dd | 5420 | if (ret < 0) { |
e6142f2e JG |
5421 | PERROR("asprintf"); |
5422 | goto end; | |
cd9290dd DG |
5423 | } |
5424 | ||
e6142f2e JG |
5425 | ret = putenv(env_value); |
5426 | if (ret) { | |
5427 | free(env_value); | |
5428 | PERROR("putenv of LTTNG_UST_CLOCK_PLUGIN"); | |
5429 | goto end; | |
5430 | } | |
cd9290dd | 5431 | |
e6142f2e JG |
5432 | DBG("Updated LTTNG_UST_CLOCK_PLUGIN environment variable to \"%s\"", |
5433 | config.lttng_ust_clock_plugin.value); | |
5434 | end: | |
4a15001e | 5435 | return ret; |
ef367a93 JG |
5436 | } |
5437 | ||
fac6795d DG |
5438 | /* |
5439 | * main | |
5440 | */ | |
5441 | int main(int argc, char **argv) | |
5442 | { | |
4a15001e | 5443 | int ret = 0, retval = 0; |
fac6795d | 5444 | void *status; |
e6142f2e | 5445 | const char *env_app_timeout; |
b3530820 JG |
5446 | struct lttng_pipe *ust32_channel_monitor_pipe = NULL, |
5447 | *ust64_channel_monitor_pipe = NULL, | |
5448 | *kernel_channel_monitor_pipe = NULL; | |
6be1a386 | 5449 | bool notification_thread_running = false; |
fac6795d | 5450 | |
335a95b7 MD |
5451 | init_kernel_workarounds(); |
5452 | ||
f6a9efaa DG |
5453 | rcu_register_thread(); |
5454 | ||
4a15001e MD |
5455 | if (set_signal_handler()) { |
5456 | retval = -1; | |
5457 | goto exit_set_signal_handler; | |
0bb7724a DG |
5458 | } |
5459 | ||
12744796 DG |
5460 | page_size = sysconf(_SC_PAGESIZE); |
5461 | if (page_size < 0) { | |
5462 | PERROR("sysconf _SC_PAGESIZE"); | |
5463 | page_size = LONG_MAX; | |
5464 | WARN("Fallback page size to %ld", page_size); | |
5465 | } | |
5466 | ||
e6142f2e JG |
5467 | ret = sessiond_config_init(&config); |
5468 | if (ret) { | |
5469 | retval = -1; | |
5470 | goto exit_set_signal_handler; | |
5471 | } | |
5472 | ||
4a15001e MD |
5473 | /* |
5474 | * Parse arguments and load the daemon configuration file. | |
5475 | * | |
5476 | * We have an exit_options exit path to free memory reserved by | |
5477 | * set_options. This is needed because the rest of sessiond_cleanup() | |
5478 | * depends on ht_cleanup_thread, which depends on lttng_daemonize, which | |
5479 | * depends on set_options. | |
5480 | */ | |
fac6795d | 5481 | progname = argv[0]; |
4a15001e MD |
5482 | if (set_options(argc, argv)) { |
5483 | retval = -1; | |
5484 | goto exit_options; | |
fac6795d DG |
5485 | } |
5486 | ||
e6142f2e JG |
5487 | /* Init config from environment variables. */ |
5488 | sessiond_config_apply_env_config(&config); | |
5489 | ||
5490 | /* | |
5491 | * Resolve all paths received as arguments, configuration option, or | |
5492 | * through environment variable as absolute paths. This is necessary | |
5493 | * since daemonizing causes the sessiond's current working directory | |
5494 | * to '/'. | |
5495 | */ | |
5496 | ret = sessiond_config_resolve_paths(&config); | |
5497 | if (ret) { | |
5498 | goto exit_options; | |
5499 | } | |
5500 | ||
5501 | /* Apply config. */ | |
5502 | lttng_opt_verbose = config.verbose; | |
5503 | lttng_opt_quiet = config.quiet; | |
5504 | kconsumer_data.err_unix_sock_path = | |
5505 | config.kconsumerd_err_unix_sock_path.value; | |
5506 | kconsumer_data.cmd_unix_sock_path = | |
5507 | config.kconsumerd_cmd_unix_sock_path.value; | |
5508 | ustconsumer32_data.err_unix_sock_path = | |
5509 | config.consumerd32_err_unix_sock_path.value; | |
5510 | ustconsumer32_data.cmd_unix_sock_path = | |
5511 | config.consumerd32_cmd_unix_sock_path.value; | |
5512 | ustconsumer64_data.err_unix_sock_path = | |
5513 | config.consumerd64_err_unix_sock_path.value; | |
5514 | ustconsumer64_data.cmd_unix_sock_path = | |
5515 | config.consumerd64_cmd_unix_sock_path.value; | |
5516 | set_clock_plugin_env(); | |
5517 | ||
5518 | sessiond_config_log(&config); | |
5519 | ||
fac6795d | 5520 | /* Daemonize */ |
e6142f2e | 5521 | if (config.daemonize || config.background) { |
ceed52b5 MD |
5522 | int i; |
5523 | ||
72dd7491 | 5524 | ret = lttng_daemonize(&child_ppid, &recv_child_signal, |
e6142f2e | 5525 | !config.background); |
53094c05 | 5526 | if (ret < 0) { |
4a15001e MD |
5527 | retval = -1; |
5528 | goto exit_options; | |
53094c05 | 5529 | } |
0bb7724a | 5530 | |
ceed52b5 | 5531 | /* |
0bb7724a | 5532 | * We are in the child. Make sure all other file descriptors are |
4a15001e MD |
5533 | * closed, in case we are called with more opened file |
5534 | * descriptors than the standard ones. | |
ceed52b5 MD |
5535 | */ |
5536 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
5537 | (void) close(i); | |
5538 | } | |
5539 | } | |
5540 | ||
7567352f MD |
5541 | if (run_as_create_worker(argv[0]) < 0) { |
5542 | goto exit_create_run_as_worker_cleanup; | |
5543 | } | |
5544 | ||
4a15001e MD |
5545 | /* |
5546 | * Starting from here, we can create threads. This needs to be after | |
5547 | * lttng_daemonize due to RCU. | |
5548 | */ | |
5549 | ||
5550 | /* | |
5551 | * Initialize the health check subsystem. This call should set the | |
5552 | * appropriate time values. | |
5553 | */ | |
5554 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); | |
5555 | if (!health_sessiond) { | |
5556 | PERROR("health_app_create error"); | |
5557 | retval = -1; | |
5558 | goto exit_health_sessiond_cleanup; | |
5559 | } | |
5560 | ||
4a15001e | 5561 | /* Create thread to clean up RCU hash tables */ |
5e97de00 | 5562 | if (init_ht_cleanup_thread(&ht_cleanup_thread)) { |
4a15001e MD |
5563 | retval = -1; |
5564 | goto exit_ht_cleanup; | |
5565 | } | |
5566 | ||
ceed52b5 | 5567 | /* Create thread quit pipe */ |
4a15001e MD |
5568 | if (init_thread_quit_pipe()) { |
5569 | retval = -1; | |
5570 | goto exit_init_data; | |
fac6795d DG |
5571 | } |
5572 | ||
5573 | /* Check if daemon is UID = 0 */ | |
5574 | is_root = !getuid(); | |
5575 | ||
b723c447 JG |
5576 | if (create_lttng_rundir()) { |
5577 | retval = -1; | |
5578 | goto exit_init_data; | |
5579 | } | |
5580 | ||
fac6795d | 5581 | if (is_root) { |
67e40797 | 5582 | /* Create global run dir with root access */ |
67e40797 | 5583 | |
b3530820 JG |
5584 | kernel_channel_monitor_pipe = lttng_pipe_open(0); |
5585 | if (!kernel_channel_monitor_pipe) { | |
5586 | ERR("Failed to create kernel consumer channel monitor pipe"); | |
5587 | retval = -1; | |
5588 | goto exit_init_data; | |
5589 | } | |
5590 | kconsumer_data.channel_monitor_pipe = | |
5591 | lttng_pipe_release_writefd( | |
5592 | kernel_channel_monitor_pipe); | |
5593 | if (kconsumer_data.channel_monitor_pipe < 0) { | |
5594 | retval = -1; | |
5595 | goto exit_init_data; | |
5596 | } | |
fac6795d DG |
5597 | } |
5598 | ||
c9cb3e7d JG |
5599 | lockfile_fd = create_lockfile(); |
5600 | if (lockfile_fd < 0) { | |
4a15001e MD |
5601 | retval = -1; |
5602 | goto exit_init_data; | |
c9cb3e7d JG |
5603 | } |
5604 | ||
5c827ce0 DG |
5605 | /* Set consumer initial state */ |
5606 | kernel_consumerd_state = CONSUMER_STOPPED; | |
5607 | ust_consumerd_state = CONSUMER_STOPPED; | |
5608 | ||
b3530820 JG |
5609 | ust32_channel_monitor_pipe = lttng_pipe_open(0); |
5610 | if (!ust32_channel_monitor_pipe) { | |
5611 | ERR("Failed to create 32-bit user space consumer channel monitor pipe"); | |
5612 | retval = -1; | |
5613 | goto exit_init_data; | |
5614 | } | |
5615 | ustconsumer32_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
5616 | ust32_channel_monitor_pipe); | |
5617 | if (ustconsumer32_data.channel_monitor_pipe < 0) { | |
5618 | retval = -1; | |
5619 | goto exit_init_data; | |
5620 | } | |
67e40797 | 5621 | |
b3530820 JG |
5622 | ust64_channel_monitor_pipe = lttng_pipe_open(0); |
5623 | if (!ust64_channel_monitor_pipe) { | |
5624 | ERR("Failed to create 64-bit user space consumer channel monitor pipe"); | |
5625 | retval = -1; | |
5626 | goto exit_init_data; | |
5627 | } | |
5628 | ustconsumer64_data.channel_monitor_pipe = lttng_pipe_release_writefd( | |
5629 | ust64_channel_monitor_pipe); | |
5630 | if (ustconsumer64_data.channel_monitor_pipe < 0) { | |
5631 | retval = -1; | |
5632 | goto exit_init_data; | |
5633 | } | |
847177cd | 5634 | |
273ea72c | 5635 | /* |
7d8234d9 | 5636 | * See if daemon already exist. |
fac6795d | 5637 | */ |
4a15001e | 5638 | if (check_existing_daemon()) { |
75462a81 | 5639 | ERR("Already running daemon.\n"); |
273ea72c | 5640 | /* |
cf3af59e MD |
5641 | * We do not goto exit because we must not cleanup() |
5642 | * because a daemon is already running. | |
ab118b20 | 5643 | */ |
4a15001e MD |
5644 | retval = -1; |
5645 | goto exit_init_data; | |
a88df331 DG |
5646 | } |
5647 | ||
1427f9b2 DG |
5648 | /* |
5649 | * Init UST app hash table. Alloc hash table before this point since | |
5650 | * cleanup() can get called after that point. | |
5651 | */ | |
4a15001e | 5652 | if (ust_app_ht_alloc()) { |
ddbeb0f6 | 5653 | ERR("Failed to allocate UST app hash table"); |
4a15001e MD |
5654 | retval = -1; |
5655 | goto exit_init_data; | |
5656 | } | |
1427f9b2 | 5657 | |
6a4e4039 JG |
5658 | /* |
5659 | * Initialize agent app hash table. We allocate the hash table here | |
5660 | * since cleanup() can get called after this point. | |
5661 | */ | |
5662 | if (agent_app_ht_alloc()) { | |
5663 | ERR("Failed to allocate Agent app hash table"); | |
4a15001e MD |
5664 | retval = -1; |
5665 | goto exit_init_data; | |
f20baf8e DG |
5666 | } |
5667 | ||
a88df331 DG |
5668 | /* |
5669 | * These actions must be executed as root. We do that *after* setting up | |
5670 | * the sockets path because we MUST make the check for another daemon using | |
5671 | * those paths *before* trying to set the kernel consumer sockets and init | |
5672 | * kernel tracer. | |
5673 | */ | |
5674 | if (is_root) { | |
e6142f2e | 5675 | if (set_consumer_sockets(&kconsumer_data)) { |
4a15001e MD |
5676 | retval = -1; |
5677 | goto exit_init_data; | |
7753dea8 MD |
5678 | } |
5679 | ||
a88df331 | 5680 | /* Setup kernel tracer */ |
e6142f2e | 5681 | if (!config.no_kernel) { |
4fba7219 | 5682 | init_kernel_tracer(); |
89588270 DG |
5683 | if (kernel_tracer_fd >= 0) { |
5684 | ret = syscall_init_table(); | |
5685 | if (ret < 0) { | |
4a15001e MD |
5686 | ERR("Unable to populate syscall table. " |
5687 | "Syscall tracing won't work " | |
5688 | "for this session daemon."); | |
89588270 | 5689 | } |
834978fd | 5690 | } |
4fba7219 | 5691 | } |
a88df331 DG |
5692 | |
5693 | /* Set ulimit for open files */ | |
5694 | set_ulimit(); | |
fac6795d | 5695 | } |
4063050c MD |
5696 | /* init lttng_fd tracking must be done after set_ulimit. */ |
5697 | lttng_fd_init(); | |
fac6795d | 5698 | |
e6142f2e | 5699 | if (set_consumer_sockets(&ustconsumer64_data)) { |
4a15001e MD |
5700 | retval = -1; |
5701 | goto exit_init_data; | |
67e40797 DG |
5702 | } |
5703 | ||
e6142f2e | 5704 | if (set_consumer_sockets(&ustconsumer32_data)) { |
4a15001e MD |
5705 | retval = -1; |
5706 | goto exit_init_data; | |
67e40797 DG |
5707 | } |
5708 | ||
d6f42150 | 5709 | /* Setup the needed unix socket */ |
4a15001e MD |
5710 | if (init_daemon_socket()) { |
5711 | retval = -1; | |
5712 | goto exit_init_data; | |
fac6795d DG |
5713 | } |
5714 | ||
5715 | /* Set credentials to socket */ | |
e6142f2e | 5716 | if (is_root && set_permissions(config.rundir.value)) { |
4a15001e MD |
5717 | retval = -1; |
5718 | goto exit_init_data; | |
fac6795d DG |
5719 | } |
5720 | ||
5b8719f5 | 5721 | /* Get parent pid if -S, --sig-parent is specified. */ |
e6142f2e | 5722 | if (config.sig_parent) { |
5b8719f5 DG |
5723 | ppid = getppid(); |
5724 | } | |
5725 | ||
7a485870 | 5726 | /* Setup the kernel pipe for waking up the kernel thread */ |
e6142f2e | 5727 | if (is_root && !config.no_kernel) { |
4a15001e MD |
5728 | if (utils_create_pipe_cloexec(kernel_poll_pipe)) { |
5729 | retval = -1; | |
5730 | goto exit_init_data; | |
6620da75 | 5731 | } |
7a485870 DG |
5732 | } |
5733 | ||
099e26bd | 5734 | /* Setup the thread apps communication pipe. */ |
4a15001e MD |
5735 | if (utils_create_pipe_cloexec(apps_cmd_pipe)) { |
5736 | retval = -1; | |
5737 | goto exit_init_data; | |
099e26bd DG |
5738 | } |
5739 | ||
d0b96690 | 5740 | /* Setup the thread apps notify communication pipe. */ |
4a15001e MD |
5741 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe)) { |
5742 | retval = -1; | |
5743 | goto exit_init_data; | |
d0b96690 DG |
5744 | } |
5745 | ||
7972aab2 DG |
5746 | /* Initialize global buffer per UID and PID registry. */ |
5747 | buffer_reg_init_uid_registry(); | |
5748 | buffer_reg_init_pid_registry(); | |
5749 | ||
099e26bd | 5750 | /* Init UST command queue. */ |
8bdee6e2 | 5751 | cds_wfcq_init(&ust_cmd_queue.head, &ust_cmd_queue.tail); |
099e26bd | 5752 | |
273ea72c | 5753 | /* |
4a15001e MD |
5754 | * Get session list pointer. This pointer MUST NOT be free'd. This list |
5755 | * is statically declared in session.c | |
273ea72c | 5756 | */ |
54d01ffb | 5757 | session_list_ptr = session_get_list(); |
b5541356 | 5758 | |
2f77fc4b | 5759 | cmd_init(); |
00e2e675 | 5760 | |
ae9e45b3 DG |
5761 | /* Check for the application socket timeout env variable. */ |
5762 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
5763 | if (env_app_timeout) { | |
e6142f2e | 5764 | config.app_socket_timeout = atoi(env_app_timeout); |
ae9e45b3 | 5765 | } else { |
e6142f2e | 5766 | config.app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; |
ae9e45b3 DG |
5767 | } |
5768 | ||
4a15001e MD |
5769 | ret = write_pidfile(); |
5770 | if (ret) { | |
5771 | ERR("Error in write_pidfile"); | |
5772 | retval = -1; | |
5773 | goto exit_init_data; | |
5774 | } | |
5775 | ret = write_agent_port(); | |
5776 | if (ret) { | |
5777 | ERR("Error in write_agent_port"); | |
5778 | retval = -1; | |
5779 | goto exit_init_data; | |
5780 | } | |
35f90c40 | 5781 | |
554831e7 MD |
5782 | /* Initialize communication library */ |
5783 | lttcomm_init(); | |
4a15001e | 5784 | /* Initialize TCP timeout values */ |
d831c249 | 5785 | lttcomm_inet_init(); |
554831e7 | 5786 | |
ef367a93 | 5787 | if (load_session_init_data(&load_info) < 0) { |
4a15001e MD |
5788 | retval = -1; |
5789 | goto exit_init_data; | |
ef367a93 | 5790 | } |
e6142f2e | 5791 | load_info->path = config.load_session_path.value; |
ef367a93 | 5792 | |
12b4fb37 | 5793 | /* Create health-check thread. */ |
1a1a34b4 | 5794 | ret = pthread_create(&health_thread, default_pthread_attr(), |
44a5e5eb | 5795 | thread_manage_health, (void *) NULL); |
4a15001e MD |
5796 | if (ret) { |
5797 | errno = ret; | |
44a5e5eb | 5798 | PERROR("pthread_create health"); |
4a15001e | 5799 | retval = -1; |
44a5e5eb DG |
5800 | goto exit_health; |
5801 | } | |
5802 | ||
b3530820 JG |
5803 | /* notification_thread_data acquires the pipes' read side. */ |
5804 | notification_thread_handle = notification_thread_handle_create( | |
5805 | ust32_channel_monitor_pipe, | |
5806 | ust64_channel_monitor_pipe, | |
5807 | kernel_channel_monitor_pipe); | |
5808 | if (!notification_thread_handle) { | |
5809 | retval = -1; | |
5810 | ERR("Failed to create notification thread shared data"); | |
5811 | stop_threads(); | |
5812 | goto exit_notification; | |
5813 | } | |
5814 | ||
5815 | /* Create notification thread. */ | |
5816 | ret = pthread_create(¬ification_thread, default_pthread_attr(), | |
5817 | thread_notification, notification_thread_handle); | |
5818 | if (ret) { | |
5819 | errno = ret; | |
5820 | PERROR("pthread_create notification"); | |
5821 | retval = -1; | |
5822 | stop_threads(); | |
5823 | goto exit_notification; | |
5824 | } | |
6be1a386 | 5825 | notification_thread_running = true; |
b3530820 | 5826 | |
cf3af59e | 5827 | /* Create thread to manage the client socket */ |
1a1a34b4 | 5828 | ret = pthread_create(&client_thread, default_pthread_attr(), |
099e26bd | 5829 | thread_manage_clients, (void *) NULL); |
4a15001e MD |
5830 | if (ret) { |
5831 | errno = ret; | |
76d7553f | 5832 | PERROR("pthread_create clients"); |
4a15001e | 5833 | retval = -1; |
b3530820 | 5834 | stop_threads(); |
cf3af59e MD |
5835 | goto exit_client; |
5836 | } | |
fac6795d | 5837 | |
099e26bd | 5838 | /* Create thread to dispatch registration */ |
1a1a34b4 | 5839 | ret = pthread_create(&dispatch_thread, default_pthread_attr(), |
099e26bd | 5840 | thread_dispatch_ust_registration, (void *) NULL); |
4a15001e MD |
5841 | if (ret) { |
5842 | errno = ret; | |
76d7553f | 5843 | PERROR("pthread_create dispatch"); |
4a15001e | 5844 | retval = -1; |
b3530820 | 5845 | stop_threads(); |
099e26bd DG |
5846 | goto exit_dispatch; |
5847 | } | |
5848 | ||
5849 | /* Create thread to manage application registration. */ | |
1a1a34b4 | 5850 | ret = pthread_create(®_apps_thread, default_pthread_attr(), |
099e26bd | 5851 | thread_registration_apps, (void *) NULL); |
4a15001e MD |
5852 | if (ret) { |
5853 | errno = ret; | |
76d7553f | 5854 | PERROR("pthread_create registration"); |
4a15001e | 5855 | retval = -1; |
b3530820 | 5856 | stop_threads(); |
099e26bd DG |
5857 | goto exit_reg_apps; |
5858 | } | |
5859 | ||
cf3af59e | 5860 | /* Create thread to manage application socket */ |
1a1a34b4 | 5861 | ret = pthread_create(&apps_thread, default_pthread_attr(), |
54d01ffb | 5862 | thread_manage_apps, (void *) NULL); |
4a15001e MD |
5863 | if (ret) { |
5864 | errno = ret; | |
d0b96690 | 5865 | PERROR("pthread_create apps"); |
4a15001e | 5866 | retval = -1; |
b3530820 | 5867 | stop_threads(); |
d0b96690 DG |
5868 | goto exit_apps; |
5869 | } | |
5870 | ||
5871 | /* Create thread to manage application notify socket */ | |
1a1a34b4 | 5872 | ret = pthread_create(&apps_notify_thread, default_pthread_attr(), |
d0b96690 | 5873 | ust_thread_manage_notify, (void *) NULL); |
4a15001e MD |
5874 | if (ret) { |
5875 | errno = ret; | |
f5c32ef1 | 5876 | PERROR("pthread_create notify"); |
4a15001e | 5877 | retval = -1; |
b3530820 | 5878 | stop_threads(); |
9563b0ad | 5879 | goto exit_apps_notify; |
cf3af59e | 5880 | } |
fac6795d | 5881 | |
022d91ba | 5882 | /* Create agent registration thread. */ |
1a1a34b4 | 5883 | ret = pthread_create(&agent_reg_thread, default_pthread_attr(), |
022d91ba | 5884 | agent_thread_manage_registration, (void *) NULL); |
4a15001e MD |
5885 | if (ret) { |
5886 | errno = ret; | |
022d91ba | 5887 | PERROR("pthread_create agent"); |
4a15001e | 5888 | retval = -1; |
b3530820 | 5889 | stop_threads(); |
022d91ba | 5890 | goto exit_agent_reg; |
4d076222 DG |
5891 | } |
5892 | ||
6620da75 | 5893 | /* Don't start this thread if kernel tracing is not requested nor root */ |
e6142f2e | 5894 | if (is_root && !config.no_kernel) { |
6620da75 | 5895 | /* Create kernel thread to manage kernel event */ |
1a1a34b4 | 5896 | ret = pthread_create(&kernel_thread, default_pthread_attr(), |
6620da75 | 5897 | thread_manage_kernel, (void *) NULL); |
4a15001e MD |
5898 | if (ret) { |
5899 | errno = ret; | |
6620da75 | 5900 | PERROR("pthread_create kernel"); |
4a15001e | 5901 | retval = -1; |
b3530820 | 5902 | stop_threads(); |
6620da75 DG |
5903 | goto exit_kernel; |
5904 | } | |
ef367a93 | 5905 | } |
7a485870 | 5906 | |
4a15001e | 5907 | /* Create session loading thread. */ |
1a1a34b4 MJ |
5908 | ret = pthread_create(&load_session_thread, default_pthread_attr(), |
5909 | thread_load_session, load_info); | |
4a15001e MD |
5910 | if (ret) { |
5911 | errno = ret; | |
5912 | PERROR("pthread_create load_session_thread"); | |
5913 | retval = -1; | |
b3530820 | 5914 | stop_threads(); |
4a15001e MD |
5915 | goto exit_load_session; |
5916 | } | |
5917 | ||
5918 | /* | |
5919 | * This is where we start awaiting program completion (e.g. through | |
5920 | * signal that asks threads to teardown). | |
5921 | */ | |
5922 | ||
5923 | ret = pthread_join(load_session_thread, &status); | |
5924 | if (ret) { | |
5925 | errno = ret; | |
5926 | PERROR("pthread_join load_session_thread"); | |
5927 | retval = -1; | |
5928 | } | |
5929 | exit_load_session: | |
ef367a93 | 5930 | |
e6142f2e | 5931 | if (is_root && !config.no_kernel) { |
6620da75 | 5932 | ret = pthread_join(kernel_thread, &status); |
4a15001e MD |
5933 | if (ret) { |
5934 | errno = ret; | |
6620da75 | 5935 | PERROR("pthread_join"); |
4a15001e | 5936 | retval = -1; |
6620da75 | 5937 | } |
fac6795d | 5938 | } |
cf3af59e | 5939 | exit_kernel: |
4a15001e | 5940 | |
022d91ba | 5941 | ret = pthread_join(agent_reg_thread, &status); |
4a15001e MD |
5942 | if (ret) { |
5943 | errno = ret; | |
022d91ba | 5944 | PERROR("pthread_join agent"); |
4a15001e | 5945 | retval = -1; |
4d076222 | 5946 | } |
022d91ba | 5947 | exit_agent_reg: |
4a15001e | 5948 | |
9563b0ad | 5949 | ret = pthread_join(apps_notify_thread, &status); |
4a15001e MD |
5950 | if (ret) { |
5951 | errno = ret; | |
9563b0ad | 5952 | PERROR("pthread_join apps notify"); |
4a15001e | 5953 | retval = -1; |
9563b0ad | 5954 | } |
9563b0ad | 5955 | exit_apps_notify: |
4a15001e | 5956 | |
cf3af59e | 5957 | ret = pthread_join(apps_thread, &status); |
4a15001e MD |
5958 | if (ret) { |
5959 | errno = ret; | |
9563b0ad | 5960 | PERROR("pthread_join apps"); |
4a15001e | 5961 | retval = -1; |
cf3af59e | 5962 | } |
cf3af59e | 5963 | exit_apps: |
4a15001e | 5964 | |
099e26bd | 5965 | ret = pthread_join(reg_apps_thread, &status); |
4a15001e MD |
5966 | if (ret) { |
5967 | errno = ret; | |
76d7553f | 5968 | PERROR("pthread_join"); |
4a15001e | 5969 | retval = -1; |
099e26bd | 5970 | } |
099e26bd | 5971 | exit_reg_apps: |
4a15001e | 5972 | |
772b8f4d MD |
5973 | /* |
5974 | * Join dispatch thread after joining reg_apps_thread to ensure | |
5975 | * we don't leak applications in the queue. | |
5976 | */ | |
099e26bd | 5977 | ret = pthread_join(dispatch_thread, &status); |
4a15001e MD |
5978 | if (ret) { |
5979 | errno = ret; | |
76d7553f | 5980 | PERROR("pthread_join"); |
4a15001e | 5981 | retval = -1; |
099e26bd | 5982 | } |
099e26bd | 5983 | exit_dispatch: |
4a15001e | 5984 | |
cf3af59e | 5985 | ret = pthread_join(client_thread, &status); |
4a15001e MD |
5986 | if (ret) { |
5987 | errno = ret; | |
76d7553f | 5988 | PERROR("pthread_join"); |
4a15001e | 5989 | retval = -1; |
cf3af59e | 5990 | } |
a88df331 | 5991 | |
b3530820 JG |
5992 | exit_client: |
5993 | exit_notification: | |
4a15001e MD |
5994 | ret = pthread_join(health_thread, &status); |
5995 | if (ret) { | |
5996 | errno = ret; | |
5997 | PERROR("pthread_join health thread"); | |
5998 | retval = -1; | |
06f525de DG |
5999 | } |
6000 | ||
b3530820 | 6001 | exit_health: |
4a15001e | 6002 | exit_init_data: |
4d62fbf8 MD |
6003 | /* |
6004 | * Wait for all pending call_rcu work to complete before tearing | |
6005 | * down data structures. call_rcu worker may be trying to | |
6006 | * perform lookups in those structures. | |
6007 | */ | |
6008 | rcu_barrier(); | |
4a15001e MD |
6009 | /* |
6010 | * sessiond_cleanup() is called when no other thread is running, except | |
6011 | * the ht_cleanup thread, which is needed to destroy the hash tables. | |
6012 | */ | |
6013 | rcu_thread_online(); | |
6014 | sessiond_cleanup(); | |
06f525de | 6015 | |
c4d5de9d JG |
6016 | /* |
6017 | * Ensure all prior call_rcu are done. call_rcu callbacks may push | |
6018 | * hash tables to the ht_cleanup thread. Therefore, we ensure that | |
6019 | * the queue is empty before shutting down the clean-up thread. | |
6020 | */ | |
6021 | rcu_barrier(); | |
6022 | ||
b3530820 JG |
6023 | /* |
6024 | * The teardown of the notification system is performed after the | |
6025 | * session daemon's teardown in order to allow it to be notified | |
6026 | * of the active session and channels at the moment of the teardown. | |
6027 | */ | |
6028 | if (notification_thread_handle) { | |
6be1a386 JG |
6029 | if (notification_thread_running) { |
6030 | notification_thread_command_quit( | |
6031 | notification_thread_handle); | |
6032 | ret = pthread_join(notification_thread, &status); | |
6033 | if (ret) { | |
6034 | errno = ret; | |
6035 | PERROR("pthread_join notification thread"); | |
6036 | retval = -1; | |
6037 | } | |
3dec304b | 6038 | } |
6be1a386 | 6039 | notification_thread_handle_destroy(notification_thread_handle); |
b3530820 JG |
6040 | } |
6041 | ||
6042 | rcu_thread_offline(); | |
6043 | rcu_unregister_thread(); | |
6044 | ||
5e97de00 | 6045 | ret = fini_ht_cleanup_thread(&ht_cleanup_thread); |
4a15001e | 6046 | if (ret) { |
4a15001e | 6047 | retval = -1; |
0b2dc8df | 6048 | } |
b3530820 JG |
6049 | lttng_pipe_destroy(ust32_channel_monitor_pipe); |
6050 | lttng_pipe_destroy(ust64_channel_monitor_pipe); | |
6051 | lttng_pipe_destroy(kernel_channel_monitor_pipe); | |
0b2dc8df | 6052 | exit_ht_cleanup: |
4a15001e | 6053 | |
4a15001e MD |
6054 | health_app_destroy(health_sessiond); |
6055 | exit_health_sessiond_cleanup: | |
7567352f | 6056 | exit_create_run_as_worker_cleanup: |
4a15001e MD |
6057 | |
6058 | exit_options: | |
6059 | sessiond_cleanup_options(); | |
6060 | ||
6061 | exit_set_signal_handler: | |
6062 | if (!retval) { | |
cf3af59e | 6063 | exit(EXIT_SUCCESS); |
4a15001e MD |
6064 | } else { |
6065 | exit(EXIT_FAILURE); | |
67e40797 | 6066 | } |
fac6795d | 6067 | } |