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> |
fac6795d | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
91d76f53 | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
91d76f53 | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
fac6795d DG |
17 | */ |
18 | ||
19 | #define _GNU_SOURCE | |
fac6795d DG |
20 | #include <getopt.h> |
21 | #include <grp.h> | |
22 | #include <limits.h> | |
23 | #include <pthread.h> | |
24 | #include <signal.h> | |
25 | #include <stdio.h> | |
26 | #include <stdlib.h> | |
27 | #include <string.h> | |
331744e3 | 28 | #include <inttypes.h> |
0fdd1e2c | 29 | #include <sys/mman.h> |
b73401da | 30 | #include <sys/mount.h> |
1e307fab | 31 | #include <sys/resource.h> |
fac6795d DG |
32 | #include <sys/socket.h> |
33 | #include <sys/stat.h> | |
34 | #include <sys/types.h> | |
0fdd1e2c | 35 | #include <sys/wait.h> |
5c827ce0 | 36 | #include <urcu/uatomic.h> |
fac6795d | 37 | #include <unistd.h> |
3bd1e081 | 38 | #include <config.h> |
fac6795d | 39 | |
990570ed | 40 | #include <common/common.h> |
d27c42b8 | 41 | #include <common/compat/socket.h> |
db758600 DG |
42 | #include <common/defaults.h> |
43 | #include <common/kernel-consumer/kernel-consumer.h> | |
50c8f484 | 44 | #include <common/futex.h> |
00e2e675 | 45 | #include <common/relayd/relayd.h> |
81b86775 | 46 | #include <common/utils.h> |
fac6795d | 47 | |
10a8a223 | 48 | #include "lttng-sessiond.h" |
7972aab2 | 49 | #include "buffer-registry.h" |
54d01ffb | 50 | #include "channel.h" |
2f77fc4b | 51 | #include "cmd.h" |
00e2e675 | 52 | #include "consumer.h" |
099e26bd | 53 | #include "context.h" |
54d01ffb | 54 | #include "event.h" |
4771f025 | 55 | #include "kernel.h" |
f1e16794 | 56 | #include "kernel-consumer.h" |
096102bd | 57 | #include "modprobe.h" |
0fdd1e2c | 58 | #include "shm.h" |
1e307fab | 59 | #include "ust-ctl.h" |
00e2e675 | 60 | #include "ust-consumer.h" |
8e68d1c8 | 61 | #include "utils.h" |
4063050c | 62 | #include "fd-limit.h" |
8782cc74 | 63 | #include "health-sessiond.h" |
8ac94142 | 64 | #include "testpoint.h" |
d0b96690 | 65 | #include "ust-thread.h" |
4d076222 | 66 | #include "jul-thread.h" |
fac6795d | 67 | |
ebaeda94 MD |
68 | #define CONSUMERD_FILE "lttng-consumerd" |
69 | ||
fac6795d | 70 | const char *progname; |
6c71277b | 71 | static const char *tracing_group_name = DEFAULT_TRACING_GROUP; |
35f90c40 | 72 | static const char *opt_pidfile; |
5b8719f5 | 73 | static int opt_sig_parent; |
97e19046 | 74 | static int opt_verbose_consumer; |
fac6795d | 75 | static int opt_daemon; |
4fba7219 | 76 | static int opt_no_kernel; |
fac6795d | 77 | static int is_root; /* Set to 1 if the daemon is running as root */ |
1d4b027a | 78 | static pid_t ppid; /* Parent PID for --sig-parent option */ |
67e40797 | 79 | static char *rundir; |
3bd1e081 | 80 | |
a23ec3a7 DG |
81 | /* |
82 | * Consumer daemon specific control data. Every value not initialized here is | |
83 | * set to 0 by the static definition. | |
84 | */ | |
3bd1e081 MD |
85 | static struct consumer_data kconsumer_data = { |
86 | .type = LTTNG_CONSUMER_KERNEL, | |
60922cb0 DG |
87 | .err_unix_sock_path = DEFAULT_KCONSUMERD_ERR_SOCK_PATH, |
88 | .cmd_unix_sock_path = DEFAULT_KCONSUMERD_CMD_SOCK_PATH, | |
03550b58 MD |
89 | .err_sock = -1, |
90 | .cmd_sock = -1, | |
173af62f DG |
91 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
92 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
93 | .cond = PTHREAD_COND_INITIALIZER, |
94 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 | 95 | }; |
7753dea8 MD |
96 | static struct consumer_data ustconsumer64_data = { |
97 | .type = LTTNG_CONSUMER64_UST, | |
60922cb0 DG |
98 | .err_unix_sock_path = DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, |
99 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, | |
03550b58 MD |
100 | .err_sock = -1, |
101 | .cmd_sock = -1, | |
173af62f DG |
102 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
103 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
104 | .cond = PTHREAD_COND_INITIALIZER, |
105 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
7753dea8 MD |
106 | }; |
107 | static struct consumer_data ustconsumer32_data = { | |
108 | .type = LTTNG_CONSUMER32_UST, | |
60922cb0 DG |
109 | .err_unix_sock_path = DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, |
110 | .cmd_unix_sock_path = DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, | |
03550b58 MD |
111 | .err_sock = -1, |
112 | .cmd_sock = -1, | |
173af62f DG |
113 | .pid_mutex = PTHREAD_MUTEX_INITIALIZER, |
114 | .lock = PTHREAD_MUTEX_INITIALIZER, | |
a23ec3a7 DG |
115 | .cond = PTHREAD_COND_INITIALIZER, |
116 | .cond_mutex = PTHREAD_MUTEX_INITIALIZER, | |
3bd1e081 MD |
117 | }; |
118 | ||
26c9d55e | 119 | /* Shared between threads */ |
099e26bd | 120 | static int dispatch_thread_exit; |
fac6795d | 121 | |
54d01ffb DG |
122 | /* Global application Unix socket path */ |
123 | static char apps_unix_sock_path[PATH_MAX]; | |
124 | /* Global client Unix socket path */ | |
125 | static char client_unix_sock_path[PATH_MAX]; | |
54d01ffb DG |
126 | /* global wait shm path for UST */ |
127 | static char wait_shm_path[PATH_MAX]; | |
44a5e5eb DG |
128 | /* Global health check unix path */ |
129 | static char health_unix_sock_path[PATH_MAX]; | |
fac6795d | 130 | |
1d4b027a | 131 | /* Sockets and FDs */ |
a4b35e07 MD |
132 | static int client_sock = -1; |
133 | static int apps_sock = -1; | |
2f77fc4b | 134 | int kernel_tracer_fd = -1; |
76d7553f | 135 | static int kernel_poll_pipe[2] = { -1, -1 }; |
1d4b027a | 136 | |
273ea72c DG |
137 | /* |
138 | * Quit pipe for all threads. This permits a single cancellation point | |
139 | * for all threads when receiving an event on the pipe. | |
140 | */ | |
76d7553f | 141 | static int thread_quit_pipe[2] = { -1, -1 }; |
273ea72c | 142 | |
099e26bd DG |
143 | /* |
144 | * This pipe is used to inform the thread managing application communication | |
145 | * that a command is queued and ready to be processed. | |
146 | */ | |
76d7553f | 147 | static int apps_cmd_pipe[2] = { -1, -1 }; |
099e26bd | 148 | |
d0b96690 DG |
149 | int apps_cmd_notify_pipe[2] = { -1, -1 }; |
150 | ||
1d4b027a | 151 | /* Pthread, Mutexes and Semaphores */ |
1d4b027a | 152 | static pthread_t apps_thread; |
d0b96690 | 153 | static pthread_t apps_notify_thread; |
099e26bd | 154 | static pthread_t reg_apps_thread; |
1d4b027a | 155 | static pthread_t client_thread; |
7a485870 | 156 | static pthread_t kernel_thread; |
099e26bd | 157 | static pthread_t dispatch_thread; |
44a5e5eb | 158 | static pthread_t health_thread; |
0b2dc8df | 159 | static pthread_t ht_cleanup_thread; |
4d076222 | 160 | static pthread_t jul_reg_thread; |
5eb91c98 | 161 | |
099e26bd DG |
162 | /* |
163 | * UST registration command queue. This queue is tied with a futex and uses a N | |
164 | * wakers / 1 waiter implemented and detailed in futex.c/.h | |
165 | * | |
166 | * The thread_manage_apps and thread_dispatch_ust_registration interact with | |
167 | * this queue and the wait/wake scheme. | |
168 | */ | |
169 | static struct ust_cmd_queue ust_cmd_queue; | |
170 | ||
b5541356 DG |
171 | /* |
172 | * Pointer initialized before thread creation. | |
173 | * | |
174 | * This points to the tracing session list containing the session count and a | |
175 | * mutex lock. The lock MUST be taken if you iterate over the list. The lock | |
176 | * MUST NOT be taken if you call a public function in session.c. | |
04ea676f | 177 | * |
d063d709 | 178 | * The lock is nested inside the structure: session_list_ptr->lock. Please use |
54d01ffb | 179 | * session_lock_list and session_unlock_list for lock acquisition. |
b5541356 DG |
180 | */ |
181 | static struct ltt_session_list *session_list_ptr; | |
182 | ||
7753dea8 MD |
183 | int ust_consumerd64_fd = -1; |
184 | int ust_consumerd32_fd = -1; | |
185 | ||
fb6f1fa2 YB |
186 | static const char *consumerd32_bin = CONFIG_CONSUMERD32_BIN; |
187 | static const char *consumerd64_bin = CONFIG_CONSUMERD64_BIN; | |
188 | static const char *consumerd32_libdir = CONFIG_CONSUMERD32_LIBDIR; | |
189 | static const char *consumerd64_libdir = CONFIG_CONSUMERD64_LIBDIR; | |
fb09408a | 190 | |
2f77fc4b DG |
191 | static const char *module_proc_lttng = "/proc/lttng"; |
192 | ||
5c827ce0 DG |
193 | /* |
194 | * Consumer daemon state which is changed when spawning it, killing it or in | |
195 | * case of a fatal error. | |
196 | */ | |
197 | enum consumerd_state { | |
198 | CONSUMER_STARTED = 1, | |
199 | CONSUMER_STOPPED = 2, | |
200 | CONSUMER_ERROR = 3, | |
201 | }; | |
202 | ||
203 | /* | |
204 | * This consumer daemon state is used to validate if a client command will be | |
205 | * able to reach the consumer. If not, the client is informed. For instance, | |
206 | * doing a "lttng start" when the consumer state is set to ERROR will return an | |
207 | * error to the client. | |
208 | * | |
209 | * The following example shows a possible race condition of this scheme: | |
210 | * | |
211 | * consumer thread error happens | |
212 | * client cmd arrives | |
213 | * client cmd checks state -> still OK | |
214 | * consumer thread exit, sets error | |
215 | * client cmd try to talk to consumer | |
216 | * ... | |
217 | * | |
218 | * However, since the consumer is a different daemon, we have no way of making | |
219 | * sure the command will reach it safely even with this state flag. This is why | |
220 | * we consider that up to the state validation during command processing, the | |
221 | * command is safe. After that, we can not guarantee the correctness of the | |
222 | * client request vis-a-vis the consumer. | |
223 | */ | |
224 | static enum consumerd_state ust_consumerd_state; | |
225 | static enum consumerd_state kernel_consumerd_state; | |
226 | ||
ae9e45b3 DG |
227 | /* |
228 | * Socket timeout for receiving and sending in seconds. | |
229 | */ | |
230 | static int app_socket_timeout; | |
231 | ||
12744796 DG |
232 | /* Set in main() with the current page size. */ |
233 | long page_size; | |
234 | ||
8782cc74 MD |
235 | /* Application health monitoring */ |
236 | struct health_app *health_sessiond; | |
237 | ||
4d076222 DG |
238 | /* JUL TCP port for registration. Used by the JUL thread. */ |
239 | unsigned int jul_tcp_port = DEFAULT_JUL_TCP_PORT; | |
240 | ||
fb09408a | 241 | static |
7753dea8 | 242 | void setup_consumerd_path(void) |
fb09408a | 243 | { |
fc7a59ce | 244 | const char *bin, *libdir; |
fb09408a | 245 | |
7753dea8 MD |
246 | /* |
247 | * Allow INSTALL_BIN_PATH to be used as a target path for the | |
ebaeda94 MD |
248 | * native architecture size consumer if CONFIG_CONSUMER*_PATH |
249 | * has not been defined. | |
7753dea8 | 250 | */ |
ebaeda94 | 251 | #if (CAA_BITS_PER_LONG == 32) |
fc7a59ce AM |
252 | if (!consumerd32_bin[0]) { |
253 | consumerd32_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
ebaeda94 MD |
254 | } |
255 | if (!consumerd32_libdir[0]) { | |
256 | consumerd32_libdir = INSTALL_LIB_PATH; | |
257 | } | |
258 | #elif (CAA_BITS_PER_LONG == 64) | |
fc7a59ce AM |
259 | if (!consumerd64_bin[0]) { |
260 | consumerd64_bin = INSTALL_BIN_PATH "/" CONSUMERD_FILE; | |
7753dea8 | 261 | } |
ebaeda94 MD |
262 | if (!consumerd64_libdir[0]) { |
263 | consumerd64_libdir = INSTALL_LIB_PATH; | |
7753dea8 MD |
264 | } |
265 | #else | |
266 | #error "Unknown bitness" | |
267 | #endif | |
268 | ||
fb09408a MD |
269 | /* |
270 | * runtime env. var. overrides the build default. | |
271 | */ | |
fc7a59ce AM |
272 | bin = getenv("LTTNG_CONSUMERD32_BIN"); |
273 | if (bin) { | |
274 | consumerd32_bin = bin; | |
7753dea8 | 275 | } |
fc7a59ce AM |
276 | bin = getenv("LTTNG_CONSUMERD64_BIN"); |
277 | if (bin) { | |
278 | consumerd64_bin = bin; | |
ebaeda94 | 279 | } |
72f579ee | 280 | libdir = getenv("LTTNG_CONSUMERD32_LIBDIR"); |
ebaeda94 MD |
281 | if (libdir) { |
282 | consumerd32_libdir = libdir; | |
283 | } | |
72f579ee | 284 | libdir = getenv("LTTNG_CONSUMERD64_LIBDIR"); |
ebaeda94 MD |
285 | if (libdir) { |
286 | consumerd64_libdir = libdir; | |
fb09408a MD |
287 | } |
288 | } | |
289 | ||
5eb91c98 DG |
290 | /* |
291 | * Create a poll set with O_CLOEXEC and add the thread quit pipe to the set. | |
292 | */ | |
d0b96690 | 293 | int sessiond_set_thread_pollset(struct lttng_poll_event *events, size_t size) |
5eb91c98 DG |
294 | { |
295 | int ret; | |
296 | ||
d0b96690 | 297 | assert(events); |
5eb91c98 DG |
298 | |
299 | ret = lttng_poll_create(events, size, LTTNG_CLOEXEC); | |
300 | if (ret < 0) { | |
301 | goto error; | |
302 | } | |
303 | ||
304 | /* Add quit pipe */ | |
d0b96690 | 305 | ret = lttng_poll_add(events, thread_quit_pipe[0], LPOLLIN | LPOLLERR); |
5eb91c98 DG |
306 | if (ret < 0) { |
307 | goto error; | |
308 | } | |
309 | ||
310 | return 0; | |
311 | ||
312 | error: | |
313 | return ret; | |
314 | } | |
315 | ||
316 | /* | |
317 | * Check if the thread quit pipe was triggered. | |
318 | * | |
319 | * Return 1 if it was triggered else 0; | |
320 | */ | |
d0b96690 | 321 | int sessiond_check_thread_quit_pipe(int fd, uint32_t events) |
5eb91c98 DG |
322 | { |
323 | if (fd == thread_quit_pipe[0] && (events & LPOLLIN)) { | |
324 | return 1; | |
325 | } | |
326 | ||
327 | return 0; | |
328 | } | |
329 | ||
273ea72c | 330 | /* |
5eb91c98 | 331 | * Init thread quit pipe. |
273ea72c DG |
332 | * |
333 | * Return -1 on error or 0 if all pipes are created. | |
334 | */ | |
335 | static int init_thread_quit_pipe(void) | |
336 | { | |
730389d9 | 337 | int ret, i; |
273ea72c | 338 | |
730389d9 | 339 | ret = pipe(thread_quit_pipe); |
273ea72c | 340 | if (ret < 0) { |
730389d9 | 341 | PERROR("thread quit pipe"); |
273ea72c DG |
342 | goto error; |
343 | } | |
344 | ||
730389d9 DG |
345 | for (i = 0; i < 2; i++) { |
346 | ret = fcntl(thread_quit_pipe[i], F_SETFD, FD_CLOEXEC); | |
347 | if (ret < 0) { | |
348 | PERROR("fcntl"); | |
349 | goto error; | |
350 | } | |
351 | } | |
352 | ||
273ea72c DG |
353 | error: |
354 | return ret; | |
355 | } | |
356 | ||
099e26bd DG |
357 | /* |
358 | * Stop all threads by closing the thread quit pipe. | |
359 | */ | |
cf3af59e MD |
360 | static void stop_threads(void) |
361 | { | |
5eb91c98 DG |
362 | int ret; |
363 | ||
cf3af59e MD |
364 | /* Stopping all threads */ |
365 | DBG("Terminating all threads"); | |
54d01ffb | 366 | ret = notify_thread_pipe(thread_quit_pipe[1]); |
5eb91c98 DG |
367 | if (ret < 0) { |
368 | ERR("write error on thread quit pipe"); | |
369 | } | |
370 | ||
099e26bd | 371 | /* Dispatch thread */ |
26c9d55e | 372 | CMM_STORE_SHARED(dispatch_thread_exit, 1); |
099e26bd | 373 | futex_nto1_wake(&ust_cmd_queue.futex); |
cf3af59e MD |
374 | } |
375 | ||
e975f9f8 DG |
376 | /* |
377 | * Close every consumer sockets. | |
378 | */ | |
379 | static void close_consumer_sockets(void) | |
380 | { | |
381 | int ret; | |
382 | ||
383 | if (kconsumer_data.err_sock >= 0) { | |
384 | ret = close(kconsumer_data.err_sock); | |
385 | if (ret < 0) { | |
386 | PERROR("kernel consumer err_sock close"); | |
387 | } | |
388 | } | |
389 | if (ustconsumer32_data.err_sock >= 0) { | |
390 | ret = close(ustconsumer32_data.err_sock); | |
391 | if (ret < 0) { | |
a76cbd9f | 392 | PERROR("UST consumerd32 err_sock close"); |
e975f9f8 DG |
393 | } |
394 | } | |
395 | if (ustconsumer64_data.err_sock >= 0) { | |
396 | ret = close(ustconsumer64_data.err_sock); | |
397 | if (ret < 0) { | |
a76cbd9f | 398 | PERROR("UST consumerd64 err_sock close"); |
e975f9f8 DG |
399 | } |
400 | } | |
401 | if (kconsumer_data.cmd_sock >= 0) { | |
402 | ret = close(kconsumer_data.cmd_sock); | |
403 | if (ret < 0) { | |
404 | PERROR("kernel consumer cmd_sock close"); | |
405 | } | |
406 | } | |
407 | if (ustconsumer32_data.cmd_sock >= 0) { | |
408 | ret = close(ustconsumer32_data.cmd_sock); | |
409 | if (ret < 0) { | |
a76cbd9f | 410 | PERROR("UST consumerd32 cmd_sock close"); |
e975f9f8 DG |
411 | } |
412 | } | |
413 | if (ustconsumer64_data.cmd_sock >= 0) { | |
414 | ret = close(ustconsumer64_data.cmd_sock); | |
415 | if (ret < 0) { | |
a76cbd9f | 416 | PERROR("UST consumerd64 cmd_sock close"); |
e975f9f8 DG |
417 | } |
418 | } | |
419 | } | |
420 | ||
fac6795d | 421 | /* |
d063d709 | 422 | * Cleanup the daemon |
fac6795d | 423 | */ |
cf3af59e | 424 | static void cleanup(void) |
fac6795d | 425 | { |
ef599319 | 426 | int ret; |
af9737e9 | 427 | struct ltt_session *sess, *stmp; |
8c6c56c2 | 428 | char path[PATH_MAX]; |
fac6795d | 429 | |
1d4b027a | 430 | DBG("Cleaning up"); |
e07ae692 | 431 | |
4e449f3f MD |
432 | /* |
433 | * Close the thread quit pipe. It has already done its job, | |
434 | * since we are now called. | |
435 | */ | |
2f77fc4b DG |
436 | utils_close_pipe(thread_quit_pipe); |
437 | ||
35f90c40 DG |
438 | /* |
439 | * If opt_pidfile is undefined, the default file will be wiped when | |
440 | * removing the rundir. | |
441 | */ | |
442 | if (opt_pidfile) { | |
443 | ret = remove(opt_pidfile); | |
444 | if (ret < 0) { | |
445 | PERROR("remove pidfile %s", opt_pidfile); | |
446 | } | |
447 | } | |
448 | ||
8c6c56c2 MD |
449 | DBG("Removing sessiond and consumerd content of directory %s", rundir); |
450 | ||
451 | /* sessiond */ | |
452 | snprintf(path, PATH_MAX, | |
453 | "%s/%s", | |
454 | rundir, DEFAULT_LTTNG_SESSIOND_PIDFILE); | |
455 | DBG("Removing %s", path); | |
456 | (void) unlink(path); | |
457 | ||
cd9290dd DG |
458 | snprintf(path, PATH_MAX, "%s/%s", rundir, |
459 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE); | |
460 | DBG("Removing %s", path); | |
461 | (void) unlink(path); | |
462 | ||
8c6c56c2 MD |
463 | /* kconsumerd */ |
464 | snprintf(path, PATH_MAX, | |
465 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, | |
466 | rundir); | |
467 | DBG("Removing %s", path); | |
468 | (void) unlink(path); | |
469 | ||
470 | snprintf(path, PATH_MAX, | |
471 | DEFAULT_KCONSUMERD_PATH, | |
472 | rundir); | |
473 | DBG("Removing directory %s", path); | |
474 | (void) rmdir(path); | |
475 | ||
476 | /* ust consumerd 32 */ | |
477 | snprintf(path, PATH_MAX, | |
478 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, | |
479 | rundir); | |
480 | DBG("Removing %s", path); | |
481 | (void) unlink(path); | |
482 | ||
483 | snprintf(path, PATH_MAX, | |
484 | DEFAULT_USTCONSUMERD32_PATH, | |
485 | rundir); | |
486 | DBG("Removing directory %s", path); | |
487 | (void) rmdir(path); | |
488 | ||
489 | /* ust consumerd 64 */ | |
490 | snprintf(path, PATH_MAX, | |
491 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, | |
492 | rundir); | |
493 | DBG("Removing %s", path); | |
494 | (void) unlink(path); | |
495 | ||
496 | snprintf(path, PATH_MAX, | |
497 | DEFAULT_USTCONSUMERD64_PATH, | |
498 | rundir); | |
499 | DBG("Removing directory %s", path); | |
500 | (void) rmdir(path); | |
5461b305 | 501 | |
bd69add2 | 502 | free(rundir); |
5461b305 | 503 | |
99bab54f | 504 | DBG("Cleaning up all sessions"); |
fac6795d | 505 | |
b5541356 | 506 | /* Destroy session list mutex */ |
273ea72c DG |
507 | if (session_list_ptr != NULL) { |
508 | pthread_mutex_destroy(&session_list_ptr->lock); | |
509 | ||
510 | /* Cleanup ALL session */ | |
54d01ffb DG |
511 | cds_list_for_each_entry_safe(sess, stmp, |
512 | &session_list_ptr->head, list) { | |
2f77fc4b | 513 | cmd_destroy_session(sess, kernel_poll_pipe[1]); |
273ea72c DG |
514 | } |
515 | } | |
516 | ||
099e26bd | 517 | DBG("Closing all UST sockets"); |
56fff090 | 518 | ust_app_clean_list(); |
7972aab2 | 519 | buffer_reg_destroy_registries(); |
099e26bd | 520 | |
4fba7219 DG |
521 | if (is_root && !opt_no_kernel) { |
522 | DBG2("Closing kernel fd"); | |
a4b35e07 | 523 | if (kernel_tracer_fd >= 0) { |
76d7553f MD |
524 | ret = close(kernel_tracer_fd); |
525 | if (ret) { | |
526 | PERROR("close"); | |
527 | } | |
a4b35e07 | 528 | } |
2f50c8a3 | 529 | DBG("Unloading kernel modules"); |
096102bd | 530 | modprobe_remove_lttng_all(); |
2f50c8a3 | 531 | } |
2f77fc4b | 532 | |
e975f9f8 DG |
533 | close_consumer_sockets(); |
534 | ||
421cb601 | 535 | /* <fun> */ |
f56a39af | 536 | DBG("%c[%d;%dm*** assert failed :-) *** ==> %c[%dm%c[%d;%dm" |
421cb601 DG |
537 | "Matthew, BEET driven development works!%c[%dm", |
538 | 27, 1, 31, 27, 0, 27, 1, 33, 27, 0); | |
539 | /* </fun> */ | |
fac6795d DG |
540 | } |
541 | ||
e065084a | 542 | /* |
d063d709 | 543 | * Send data on a unix socket using the liblttsessiondcomm API. |
e065084a | 544 | * |
d063d709 | 545 | * Return lttcomm error code. |
e065084a DG |
546 | */ |
547 | static int send_unix_sock(int sock, void *buf, size_t len) | |
548 | { | |
549 | /* Check valid length */ | |
c617c0c6 | 550 | if (len == 0) { |
e065084a DG |
551 | return -1; |
552 | } | |
553 | ||
554 | return lttcomm_send_unix_sock(sock, buf, len); | |
555 | } | |
556 | ||
5461b305 | 557 | /* |
d063d709 | 558 | * Free memory of a command context structure. |
5461b305 | 559 | */ |
a2fb29a5 | 560 | static void clean_command_ctx(struct command_ctx **cmd_ctx) |
5461b305 | 561 | { |
a2fb29a5 DG |
562 | DBG("Clean command context structure"); |
563 | if (*cmd_ctx) { | |
564 | if ((*cmd_ctx)->llm) { | |
565 | free((*cmd_ctx)->llm); | |
5461b305 | 566 | } |
a2fb29a5 DG |
567 | if ((*cmd_ctx)->lsm) { |
568 | free((*cmd_ctx)->lsm); | |
5461b305 | 569 | } |
a2fb29a5 DG |
570 | free(*cmd_ctx); |
571 | *cmd_ctx = NULL; | |
5461b305 DG |
572 | } |
573 | } | |
574 | ||
fac6795d | 575 | /* |
0fdd1e2c | 576 | * Notify UST applications using the shm mmap futex. |
fac6795d | 577 | */ |
0fdd1e2c | 578 | static int notify_ust_apps(int active) |
fac6795d | 579 | { |
0fdd1e2c | 580 | char *wait_shm_mmap; |
fac6795d | 581 | |
0fdd1e2c | 582 | DBG("Notifying applications of session daemon state: %d", active); |
e07ae692 | 583 | |
0fdd1e2c DG |
584 | /* See shm.c for this call implying mmap, shm and futex calls */ |
585 | wait_shm_mmap = shm_ust_get_mmap(wait_shm_path, is_root); | |
586 | if (wait_shm_mmap == NULL) { | |
fac6795d DG |
587 | goto error; |
588 | } | |
589 | ||
0fdd1e2c DG |
590 | /* Wake waiting process */ |
591 | futex_wait_update((int32_t *) wait_shm_mmap, active); | |
592 | ||
593 | /* Apps notified successfully */ | |
594 | return 0; | |
fac6795d DG |
595 | |
596 | error: | |
0fdd1e2c | 597 | return -1; |
fac6795d DG |
598 | } |
599 | ||
e065084a | 600 | /* |
d063d709 DG |
601 | * Setup the outgoing data buffer for the response (llm) by allocating the |
602 | * right amount of memory and copying the original information from the lsm | |
603 | * structure. | |
ca95a216 | 604 | * |
d063d709 | 605 | * Return total size of the buffer pointed by buf. |
ca95a216 | 606 | */ |
5461b305 | 607 | static int setup_lttng_msg(struct command_ctx *cmd_ctx, size_t size) |
ca95a216 | 608 | { |
f3ed775e | 609 | int ret, buf_size; |
ca95a216 | 610 | |
f3ed775e | 611 | buf_size = size; |
5461b305 | 612 | |
ba7f0ae5 | 613 | cmd_ctx->llm = zmalloc(sizeof(struct lttcomm_lttng_msg) + buf_size); |
5461b305 | 614 | if (cmd_ctx->llm == NULL) { |
76d7553f | 615 | PERROR("zmalloc"); |
5461b305 | 616 | ret = -ENOMEM; |
ca95a216 DG |
617 | goto error; |
618 | } | |
619 | ||
5461b305 DG |
620 | /* Copy common data */ |
621 | cmd_ctx->llm->cmd_type = cmd_ctx->lsm->cmd_type; | |
9f19cc17 | 622 | cmd_ctx->llm->pid = cmd_ctx->lsm->domain.attr.pid; |
5461b305 | 623 | |
5461b305 DG |
624 | cmd_ctx->llm->data_size = size; |
625 | cmd_ctx->lttng_msg_size = sizeof(struct lttcomm_lttng_msg) + buf_size; | |
626 | ||
ca95a216 DG |
627 | return buf_size; |
628 | ||
629 | error: | |
630 | return ret; | |
631 | } | |
632 | ||
7a485870 | 633 | /* |
5eb91c98 | 634 | * Update the kernel poll set of all channel fd available over all tracing |
d063d709 | 635 | * session. Add the wakeup pipe at the end of the set. |
7a485870 | 636 | */ |
5eb91c98 | 637 | static int update_kernel_poll(struct lttng_poll_event *events) |
7a485870 | 638 | { |
5eb91c98 | 639 | int ret; |
7a485870 DG |
640 | struct ltt_session *session; |
641 | struct ltt_kernel_channel *channel; | |
642 | ||
5eb91c98 | 643 | DBG("Updating kernel poll set"); |
7a485870 | 644 | |
54d01ffb | 645 | session_lock_list(); |
b5541356 | 646 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 647 | session_lock(session); |
7a485870 | 648 | if (session->kernel_session == NULL) { |
54d01ffb | 649 | session_unlock(session); |
7a485870 DG |
650 | continue; |
651 | } | |
7a485870 | 652 | |
54d01ffb DG |
653 | cds_list_for_each_entry(channel, |
654 | &session->kernel_session->channel_list.head, list) { | |
5eb91c98 DG |
655 | /* Add channel fd to the kernel poll set */ |
656 | ret = lttng_poll_add(events, channel->fd, LPOLLIN | LPOLLRDNORM); | |
657 | if (ret < 0) { | |
54d01ffb | 658 | session_unlock(session); |
5eb91c98 DG |
659 | goto error; |
660 | } | |
661 | DBG("Channel fd %d added to kernel set", channel->fd); | |
7a485870 | 662 | } |
54d01ffb | 663 | session_unlock(session); |
7a485870 | 664 | } |
54d01ffb | 665 | session_unlock_list(); |
7a485870 | 666 | |
5eb91c98 | 667 | return 0; |
7a485870 DG |
668 | |
669 | error: | |
54d01ffb | 670 | session_unlock_list(); |
7a485870 DG |
671 | return -1; |
672 | } | |
673 | ||
674 | /* | |
54d01ffb | 675 | * Find the channel fd from 'fd' over all tracing session. When found, check |
d063d709 | 676 | * for new channel stream and send those stream fds to the kernel consumer. |
7a485870 | 677 | * |
d063d709 | 678 | * Useful for CPU hotplug feature. |
7a485870 | 679 | */ |
2bdd86d4 | 680 | static int update_kernel_stream(struct consumer_data *consumer_data, int fd) |
7a485870 DG |
681 | { |
682 | int ret = 0; | |
683 | struct ltt_session *session; | |
173af62f | 684 | struct ltt_kernel_session *ksess; |
7a485870 DG |
685 | struct ltt_kernel_channel *channel; |
686 | ||
687 | DBG("Updating kernel streams for channel fd %d", fd); | |
688 | ||
54d01ffb | 689 | session_lock_list(); |
b5541356 | 690 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { |
54d01ffb | 691 | session_lock(session); |
7a485870 | 692 | if (session->kernel_session == NULL) { |
54d01ffb | 693 | session_unlock(session); |
7a485870 DG |
694 | continue; |
695 | } | |
173af62f | 696 | ksess = session->kernel_session; |
d9800920 | 697 | |
173af62f | 698 | cds_list_for_each_entry(channel, &ksess->channel_list.head, list) { |
7a485870 DG |
699 | if (channel->fd == fd) { |
700 | DBG("Channel found, updating kernel streams"); | |
701 | ret = kernel_open_channel_stream(channel); | |
702 | if (ret < 0) { | |
b3c750d2 | 703 | goto error; |
7a485870 | 704 | } |
5c786ded JD |
705 | /* Update the stream global counter */ |
706 | ksess->stream_count_global += ret; | |
d9800920 | 707 | |
7a485870 | 708 | /* |
5eb91c98 DG |
709 | * Have we already sent fds to the consumer? If yes, it means |
710 | * that tracing is started so it is safe to send our updated | |
711 | * stream fds. | |
7a485870 | 712 | */ |
173af62f DG |
713 | if (ksess->consumer_fds_sent == 1 && ksess->consumer != NULL) { |
714 | struct lttng_ht_iter iter; | |
715 | struct consumer_socket *socket; | |
716 | ||
e7fe706f | 717 | rcu_read_lock(); |
173af62f DG |
718 | cds_lfht_for_each_entry(ksess->consumer->socks->ht, |
719 | &iter.iter, socket, node.node) { | |
173af62f | 720 | pthread_mutex_lock(socket->lock); |
f50f23d9 | 721 | ret = kernel_consumer_send_channel_stream(socket, |
2bba9e53 DG |
722 | channel, ksess, |
723 | session->output_traces ? 1 : 0); | |
173af62f DG |
724 | pthread_mutex_unlock(socket->lock); |
725 | if (ret < 0) { | |
e7fe706f | 726 | rcu_read_unlock(); |
173af62f DG |
727 | goto error; |
728 | } | |
7a485870 | 729 | } |
e7fe706f | 730 | rcu_read_unlock(); |
7a485870 | 731 | } |
b3c750d2 | 732 | goto error; |
7a485870 DG |
733 | } |
734 | } | |
54d01ffb | 735 | session_unlock(session); |
7a485870 | 736 | } |
54d01ffb | 737 | session_unlock_list(); |
b3c750d2 | 738 | return ret; |
7a485870 | 739 | |
b3c750d2 | 740 | error: |
54d01ffb DG |
741 | session_unlock(session); |
742 | session_unlock_list(); | |
7a485870 DG |
743 | return ret; |
744 | } | |
745 | ||
487cf67c | 746 | /* |
ffe60014 DG |
747 | * For each tracing session, update newly registered apps. The session list |
748 | * lock MUST be acquired before calling this. | |
487cf67c DG |
749 | */ |
750 | static void update_ust_app(int app_sock) | |
751 | { | |
752 | struct ltt_session *sess, *stmp; | |
753 | ||
fdadac08 DG |
754 | /* Consumer is in an ERROR state. Stop any application update. */ |
755 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
756 | /* Stop the update process since the consumer is dead. */ | |
757 | return; | |
758 | } | |
759 | ||
487cf67c DG |
760 | /* For all tracing session(s) */ |
761 | cds_list_for_each_entry_safe(sess, stmp, &session_list_ptr->head, list) { | |
4ee14516 | 762 | session_lock(sess); |
421cb601 DG |
763 | if (sess->ust_session) { |
764 | ust_app_global_update(sess->ust_session, app_sock); | |
765 | } | |
4ee14516 | 766 | session_unlock(sess); |
487cf67c DG |
767 | } |
768 | } | |
769 | ||
7a485870 | 770 | /* |
d063d709 | 771 | * This thread manage event coming from the kernel. |
7a485870 | 772 | * |
d063d709 DG |
773 | * Features supported in this thread: |
774 | * -) CPU Hotplug | |
7a485870 DG |
775 | */ |
776 | static void *thread_manage_kernel(void *data) | |
777 | { | |
139ac872 | 778 | int ret, i, pollfd, update_poll_flag = 1, err = -1; |
5eb91c98 | 779 | uint32_t revents, nb_fd; |
7a485870 | 780 | char tmp; |
5eb91c98 | 781 | struct lttng_poll_event events; |
7a485870 | 782 | |
6993eeb3 | 783 | DBG("[thread] Thread manage kernel started"); |
7a485870 | 784 | |
6c71277b | 785 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_KERNEL); |
927ca06a | 786 | |
d5d63bf1 DG |
787 | /* |
788 | * This first step of the while is to clean this structure which could free | |
6d737ce4 | 789 | * non NULL pointers so initialize it before the loop. |
d5d63bf1 | 790 | */ |
6d737ce4 | 791 | lttng_poll_init(&events); |
d5d63bf1 | 792 | |
6993eeb3 CB |
793 | if (testpoint(thread_manage_kernel)) { |
794 | goto error_testpoint; | |
795 | } | |
8ac94142 | 796 | |
840cb59c | 797 | health_code_update(); |
44a5e5eb | 798 | |
6993eeb3 | 799 | if (testpoint(thread_manage_kernel_before_loop)) { |
d21b0d71 | 800 | goto error_testpoint; |
6993eeb3 CB |
801 | } |
802 | ||
7a485870 | 803 | while (1) { |
840cb59c | 804 | health_code_update(); |
44a5e5eb | 805 | |
7a485870 | 806 | if (update_poll_flag == 1) { |
d21b0d71 DG |
807 | /* Clean events object. We are about to populate it again. */ |
808 | lttng_poll_clean(&events); | |
809 | ||
d0b96690 | 810 | ret = sessiond_set_thread_pollset(&events, 2); |
d21b0d71 DG |
811 | if (ret < 0) { |
812 | goto error_poll_create; | |
813 | } | |
814 | ||
815 | ret = lttng_poll_add(&events, kernel_poll_pipe[0], LPOLLIN); | |
816 | if (ret < 0) { | |
817 | goto error; | |
818 | } | |
5f822d0a | 819 | |
d21b0d71 | 820 | /* This will add the available kernel channel if any. */ |
5eb91c98 DG |
821 | ret = update_kernel_poll(&events); |
822 | if (ret < 0) { | |
7a485870 DG |
823 | goto error; |
824 | } | |
825 | update_poll_flag = 0; | |
826 | } | |
827 | ||
d21b0d71 | 828 | DBG("Thread kernel polling on %d fds", LTTNG_POLL_GETNB(&events)); |
7a485870 DG |
829 | |
830 | /* Poll infinite value of time */ | |
88f2b785 | 831 | restart: |
a78af745 | 832 | health_poll_entry(); |
5eb91c98 | 833 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 834 | health_poll_exit(); |
7a485870 | 835 | if (ret < 0) { |
88f2b785 MD |
836 | /* |
837 | * Restart interrupted system call. | |
838 | */ | |
839 | if (errno == EINTR) { | |
840 | goto restart; | |
841 | } | |
7a485870 DG |
842 | goto error; |
843 | } else if (ret == 0) { | |
844 | /* Should not happen since timeout is infinite */ | |
85611738 DG |
845 | ERR("Return value of poll is 0 with an infinite timeout.\n" |
846 | "This should not have happened! Continuing..."); | |
7a485870 DG |
847 | continue; |
848 | } | |
849 | ||
0d9c5d77 DG |
850 | nb_fd = ret; |
851 | ||
5eb91c98 DG |
852 | for (i = 0; i < nb_fd; i++) { |
853 | /* Fetch once the poll data */ | |
854 | revents = LTTNG_POLL_GETEV(&events, i); | |
855 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
7a485870 | 856 | |
840cb59c | 857 | health_code_update(); |
44a5e5eb | 858 | |
5eb91c98 | 859 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 860 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 861 | if (ret) { |
139ac872 MD |
862 | err = 0; |
863 | goto exit; | |
5eb91c98 | 864 | } |
7a485870 | 865 | |
5eb91c98 DG |
866 | /* Check for data on kernel pipe */ |
867 | if (pollfd == kernel_poll_pipe[0] && (revents & LPOLLIN)) { | |
f921c78f DG |
868 | do { |
869 | ret = read(kernel_poll_pipe[0], &tmp, 1); | |
870 | } while (ret < 0 && errno == EINTR); | |
871 | /* | |
872 | * Ret value is useless here, if this pipe gets any actions an | |
873 | * update is required anyway. | |
874 | */ | |
5eb91c98 DG |
875 | update_poll_flag = 1; |
876 | continue; | |
877 | } else { | |
878 | /* | |
879 | * New CPU detected by the kernel. Adding kernel stream to | |
880 | * kernel session and updating the kernel consumer | |
881 | */ | |
882 | if (revents & LPOLLIN) { | |
2bdd86d4 | 883 | ret = update_kernel_stream(&kconsumer_data, pollfd); |
5eb91c98 DG |
884 | if (ret < 0) { |
885 | continue; | |
886 | } | |
887 | break; | |
888 | /* | |
889 | * TODO: We might want to handle the LPOLLERR | LPOLLHUP | |
890 | * and unregister kernel stream at this point. | |
891 | */ | |
7a485870 | 892 | } |
7a485870 DG |
893 | } |
894 | } | |
895 | } | |
896 | ||
139ac872 | 897 | exit: |
7a485870 | 898 | error: |
5eb91c98 | 899 | lttng_poll_clean(&events); |
76d7553f | 900 | error_poll_create: |
6993eeb3 | 901 | error_testpoint: |
6620da75 DG |
902 | utils_close_pipe(kernel_poll_pipe); |
903 | kernel_poll_pipe[0] = kernel_poll_pipe[1] = -1; | |
139ac872 | 904 | if (err) { |
840cb59c | 905 | health_error(); |
139ac872 | 906 | ERR("Health error occurred in %s", __func__); |
6620da75 DG |
907 | WARN("Kernel thread died unexpectedly. " |
908 | "Kernel tracing can continue but CPU hotplug is disabled."); | |
139ac872 | 909 | } |
8782cc74 | 910 | health_unregister(health_sessiond); |
76d7553f | 911 | DBG("Kernel thread dying"); |
7a485870 DG |
912 | return NULL; |
913 | } | |
914 | ||
a23ec3a7 DG |
915 | /* |
916 | * Signal pthread condition of the consumer data that the thread. | |
917 | */ | |
918 | static void signal_consumer_condition(struct consumer_data *data, int state) | |
919 | { | |
920 | pthread_mutex_lock(&data->cond_mutex); | |
921 | ||
922 | /* | |
923 | * The state is set before signaling. It can be any value, it's the waiter | |
924 | * job to correctly interpret this condition variable associated to the | |
925 | * consumer pthread_cond. | |
926 | * | |
927 | * A value of 0 means that the corresponding thread of the consumer data | |
928 | * was not started. 1 indicates that the thread has started and is ready | |
929 | * for action. A negative value means that there was an error during the | |
930 | * thread bootstrap. | |
931 | */ | |
932 | data->consumer_thread_is_ready = state; | |
933 | (void) pthread_cond_signal(&data->cond); | |
934 | ||
935 | pthread_mutex_unlock(&data->cond_mutex); | |
936 | } | |
937 | ||
1d4b027a | 938 | /* |
3bd1e081 | 939 | * This thread manage the consumer error sent back to the session daemon. |
1d4b027a | 940 | */ |
3bd1e081 | 941 | static void *thread_manage_consumer(void *data) |
1d4b027a | 942 | { |
139ac872 | 943 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 | 944 | uint32_t revents, nb_fd; |
1d4b027a | 945 | enum lttcomm_return_code code; |
5eb91c98 | 946 | struct lttng_poll_event events; |
3bd1e081 | 947 | struct consumer_data *consumer_data = data; |
1d4b027a | 948 | |
3bd1e081 | 949 | DBG("[thread] Manage consumer started"); |
1d4b027a | 950 | |
6c71277b | 951 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CONSUMER); |
927ca06a | 952 | |
855060f8 | 953 | health_code_update(); |
9449cc75 | 954 | |
5eb91c98 | 955 | /* |
331744e3 JD |
956 | * Pass 3 as size here for the thread quit pipe, consumerd_err_sock and the |
957 | * metadata_sock. Nothing more will be added to this poll set. | |
5eb91c98 | 958 | */ |
331744e3 | 959 | ret = sessiond_set_thread_pollset(&events, 3); |
5eb91c98 | 960 | if (ret < 0) { |
76d7553f | 961 | goto error_poll; |
5eb91c98 | 962 | } |
273ea72c | 963 | |
edb8b045 DG |
964 | /* |
965 | * The error socket here is already in a listening state which was done | |
966 | * just before spawning this thread to avoid a race between the consumer | |
967 | * daemon exec trying to connect and the listen() call. | |
968 | */ | |
3bd1e081 | 969 | ret = lttng_poll_add(&events, consumer_data->err_sock, LPOLLIN | LPOLLRDHUP); |
5eb91c98 DG |
970 | if (ret < 0) { |
971 | goto error; | |
972 | } | |
973 | ||
840cb59c | 974 | health_code_update(); |
44a5e5eb | 975 | |
331744e3 | 976 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 977 | restart: |
a78af745 | 978 | health_poll_entry(); |
8ac94142 | 979 | |
6993eeb3 CB |
980 | if (testpoint(thread_manage_consumer)) { |
981 | goto error; | |
982 | } | |
8ac94142 | 983 | |
5eb91c98 | 984 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 985 | health_poll_exit(); |
273ea72c | 986 | if (ret < 0) { |
88f2b785 MD |
987 | /* |
988 | * Restart interrupted system call. | |
989 | */ | |
990 | if (errno == EINTR) { | |
991 | goto restart; | |
992 | } | |
273ea72c DG |
993 | goto error; |
994 | } | |
995 | ||
0d9c5d77 DG |
996 | nb_fd = ret; |
997 | ||
5eb91c98 DG |
998 | for (i = 0; i < nb_fd; i++) { |
999 | /* Fetch once the poll data */ | |
1000 | revents = LTTNG_POLL_GETEV(&events, i); | |
1001 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1002 | ||
840cb59c | 1003 | health_code_update(); |
44a5e5eb | 1004 | |
5eb91c98 | 1005 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1006 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1007 | if (ret) { |
139ac872 MD |
1008 | err = 0; |
1009 | goto exit; | |
5eb91c98 DG |
1010 | } |
1011 | ||
1012 | /* Event on the registration socket */ | |
3bd1e081 | 1013 | if (pollfd == consumer_data->err_sock) { |
5eb91c98 | 1014 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { |
3bd1e081 | 1015 | ERR("consumer err socket poll error"); |
5eb91c98 DG |
1016 | goto error; |
1017 | } | |
1018 | } | |
273ea72c DG |
1019 | } |
1020 | ||
3bd1e081 | 1021 | sock = lttcomm_accept_unix_sock(consumer_data->err_sock); |
1d4b027a DG |
1022 | if (sock < 0) { |
1023 | goto error; | |
1024 | } | |
1025 | ||
b662582b DG |
1026 | /* |
1027 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
1028 | * show must go on. | |
1029 | */ | |
1030 | (void) utils_set_fd_cloexec(sock); | |
1031 | ||
840cb59c | 1032 | health_code_update(); |
44a5e5eb | 1033 | |
3bd1e081 | 1034 | DBG2("Receiving code from consumer err_sock"); |
ee0b0061 | 1035 | |
712ea556 | 1036 | /* Getting status code from kconsumerd */ |
54d01ffb DG |
1037 | ret = lttcomm_recv_unix_sock(sock, &code, |
1038 | sizeof(enum lttcomm_return_code)); | |
1d4b027a DG |
1039 | if (ret <= 0) { |
1040 | goto error; | |
1041 | } | |
1042 | ||
840cb59c | 1043 | health_code_update(); |
44a5e5eb | 1044 | |
f73fabfd | 1045 | if (code == LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) { |
331744e3 | 1046 | /* Connect both socket, command and metadata. */ |
3bd1e081 MD |
1047 | consumer_data->cmd_sock = |
1048 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); | |
4ce514c4 | 1049 | consumer_data->metadata_fd = |
331744e3 | 1050 | lttcomm_connect_unix_sock(consumer_data->cmd_unix_sock_path); |
92db7cdc DG |
1051 | if (consumer_data->cmd_sock < 0 |
1052 | || consumer_data->metadata_fd < 0) { | |
331744e3 | 1053 | PERROR("consumer connect cmd socket"); |
a23ec3a7 DG |
1054 | /* On error, signal condition and quit. */ |
1055 | signal_consumer_condition(consumer_data, -1); | |
1d4b027a DG |
1056 | goto error; |
1057 | } | |
9363801e | 1058 | consumer_data->metadata_sock.fd_ptr = &consumer_data->metadata_fd; |
331744e3 JD |
1059 | /* Create metadata socket lock. */ |
1060 | consumer_data->metadata_sock.lock = zmalloc(sizeof(pthread_mutex_t)); | |
1061 | if (consumer_data->metadata_sock.lock == NULL) { | |
1062 | PERROR("zmalloc pthread mutex"); | |
1063 | ret = -1; | |
1064 | goto error; | |
1065 | } | |
1066 | pthread_mutex_init(consumer_data->metadata_sock.lock, NULL); | |
1067 | ||
a23ec3a7 | 1068 | signal_consumer_condition(consumer_data, 1); |
331744e3 JD |
1069 | DBG("Consumer command socket ready (fd: %d", consumer_data->cmd_sock); |
1070 | DBG("Consumer metadata socket ready (fd: %d)", | |
4ce514c4 | 1071 | consumer_data->metadata_fd); |
1d4b027a | 1072 | } else { |
3bd1e081 | 1073 | ERR("consumer error when waiting for SOCK_READY : %s", |
1d4b027a DG |
1074 | lttcomm_get_readable_code(-code)); |
1075 | goto error; | |
1076 | } | |
1077 | ||
331744e3 | 1078 | /* Remove the consumerd error sock since we've established a connexion */ |
3bd1e081 | 1079 | ret = lttng_poll_del(&events, consumer_data->err_sock); |
72079cae | 1080 | if (ret < 0) { |
72079cae DG |
1081 | goto error; |
1082 | } | |
1083 | ||
331744e3 | 1084 | /* Add new accepted error socket. */ |
5eb91c98 DG |
1085 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLRDHUP); |
1086 | if (ret < 0) { | |
72079cae | 1087 | goto error; |
5eb91c98 DG |
1088 | } |
1089 | ||
331744e3 | 1090 | /* Add metadata socket that is successfully connected. */ |
4ce514c4 | 1091 | ret = lttng_poll_add(&events, consumer_data->metadata_fd, |
331744e3 JD |
1092 | LPOLLIN | LPOLLRDHUP); |
1093 | if (ret < 0) { | |
1094 | goto error; | |
1095 | } | |
1096 | ||
840cb59c | 1097 | health_code_update(); |
44a5e5eb | 1098 | |
331744e3 | 1099 | /* Infinite blocking call, waiting for transmission */ |
88f2b785 | 1100 | restart_poll: |
331744e3 JD |
1101 | while (1) { |
1102 | health_poll_entry(); | |
1103 | ret = lttng_poll_wait(&events, -1); | |
1104 | health_poll_exit(); | |
1105 | if (ret < 0) { | |
1106 | /* | |
1107 | * Restart interrupted system call. | |
1108 | */ | |
1109 | if (errno == EINTR) { | |
1110 | goto restart_poll; | |
1111 | } | |
1112 | goto error; | |
88f2b785 | 1113 | } |
72079cae | 1114 | |
331744e3 | 1115 | nb_fd = ret; |
0d9c5d77 | 1116 | |
331744e3 JD |
1117 | for (i = 0; i < nb_fd; i++) { |
1118 | /* Fetch once the poll data */ | |
1119 | revents = LTTNG_POLL_GETEV(&events, i); | |
1120 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
5eb91c98 | 1121 | |
331744e3 | 1122 | health_code_update(); |
44a5e5eb | 1123 | |
331744e3 JD |
1124 | /* Thread quit pipe has been closed. Killing thread. */ |
1125 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); | |
1126 | if (ret) { | |
1127 | err = 0; | |
1128 | goto exit; | |
1129 | } | |
5eb91c98 | 1130 | |
331744e3 JD |
1131 | if (pollfd == sock) { |
1132 | /* Event on the consumerd socket */ | |
1133 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1134 | ERR("consumer err socket second poll error"); | |
1135 | goto error; | |
1136 | } | |
1137 | health_code_update(); | |
1138 | /* Wait for any kconsumerd error */ | |
1139 | ret = lttcomm_recv_unix_sock(sock, &code, | |
1140 | sizeof(enum lttcomm_return_code)); | |
1141 | if (ret <= 0) { | |
1142 | ERR("consumer closed the command socket"); | |
1143 | goto error; | |
1144 | } | |
1145 | ||
1146 | ERR("consumer return code : %s", | |
1147 | lttcomm_get_readable_code(-code)); | |
1148 | ||
1149 | goto exit; | |
4ce514c4 | 1150 | } else if (pollfd == consumer_data->metadata_fd) { |
331744e3 JD |
1151 | /* UST metadata requests */ |
1152 | ret = ust_consumer_metadata_request( | |
1153 | &consumer_data->metadata_sock); | |
1154 | if (ret < 0) { | |
1155 | ERR("Handling metadata request"); | |
1156 | goto error; | |
1157 | } | |
1158 | break; | |
1159 | } else { | |
1160 | ERR("Unknown pollfd"); | |
5eb91c98 DG |
1161 | goto error; |
1162 | } | |
1163 | } | |
331744e3 | 1164 | health_code_update(); |
5eb91c98 DG |
1165 | } |
1166 | ||
139ac872 | 1167 | exit: |
1d4b027a | 1168 | error: |
fdadac08 DG |
1169 | /* |
1170 | * We lock here because we are about to close the sockets and some other | |
92db7cdc DG |
1171 | * thread might be using them so get exclusive access which will abort all |
1172 | * other consumer command by other threads. | |
fdadac08 DG |
1173 | */ |
1174 | pthread_mutex_lock(&consumer_data->lock); | |
1175 | ||
5c827ce0 DG |
1176 | /* Immediately set the consumerd state to stopped */ |
1177 | if (consumer_data->type == LTTNG_CONSUMER_KERNEL) { | |
1178 | uatomic_set(&kernel_consumerd_state, CONSUMER_ERROR); | |
1179 | } else if (consumer_data->type == LTTNG_CONSUMER64_UST || | |
1180 | consumer_data->type == LTTNG_CONSUMER32_UST) { | |
1181 | uatomic_set(&ust_consumerd_state, CONSUMER_ERROR); | |
1182 | } else { | |
1183 | /* Code flow error... */ | |
1184 | assert(0); | |
1185 | } | |
1186 | ||
76d7553f MD |
1187 | if (consumer_data->err_sock >= 0) { |
1188 | ret = close(consumer_data->err_sock); | |
1189 | if (ret) { | |
1190 | PERROR("close"); | |
1191 | } | |
a76cbd9f | 1192 | consumer_data->err_sock = -1; |
76d7553f MD |
1193 | } |
1194 | if (consumer_data->cmd_sock >= 0) { | |
1195 | ret = close(consumer_data->cmd_sock); | |
1196 | if (ret) { | |
1197 | PERROR("close"); | |
1198 | } | |
a76cbd9f | 1199 | consumer_data->cmd_sock = -1; |
76d7553f | 1200 | } |
9363801e DG |
1201 | if (*consumer_data->metadata_sock.fd_ptr >= 0) { |
1202 | ret = close(*consumer_data->metadata_sock.fd_ptr); | |
331744e3 JD |
1203 | if (ret) { |
1204 | PERROR("close"); | |
1205 | } | |
1206 | } | |
331744e3 | 1207 | |
76d7553f MD |
1208 | if (sock >= 0) { |
1209 | ret = close(sock); | |
1210 | if (ret) { | |
1211 | PERROR("close"); | |
1212 | } | |
1213 | } | |
273ea72c | 1214 | |
3bd1e081 MD |
1215 | unlink(consumer_data->err_unix_sock_path); |
1216 | unlink(consumer_data->cmd_unix_sock_path); | |
1217 | consumer_data->pid = 0; | |
fdadac08 | 1218 | pthread_mutex_unlock(&consumer_data->lock); |
92db7cdc | 1219 | |
fdadac08 DG |
1220 | /* Cleanup metadata socket mutex. */ |
1221 | pthread_mutex_destroy(consumer_data->metadata_sock.lock); | |
1222 | free(consumer_data->metadata_sock.lock); | |
1d4b027a | 1223 | |
5eb91c98 | 1224 | lttng_poll_clean(&events); |
76d7553f | 1225 | error_poll: |
139ac872 | 1226 | if (err) { |
840cb59c | 1227 | health_error(); |
139ac872 MD |
1228 | ERR("Health error occurred in %s", __func__); |
1229 | } | |
8782cc74 | 1230 | health_unregister(health_sessiond); |
76d7553f | 1231 | DBG("consumer thread cleanup completed"); |
0177d773 | 1232 | |
5eb91c98 | 1233 | return NULL; |
099e26bd DG |
1234 | } |
1235 | ||
099e26bd DG |
1236 | /* |
1237 | * This thread manage application communication. | |
1d4b027a DG |
1238 | */ |
1239 | static void *thread_manage_apps(void *data) | |
099e26bd | 1240 | { |
139ac872 | 1241 | int i, ret, pollfd, err = -1; |
5eb91c98 | 1242 | uint32_t revents, nb_fd; |
5eb91c98 | 1243 | struct lttng_poll_event events; |
099e26bd DG |
1244 | |
1245 | DBG("[thread] Manage application started"); | |
1246 | ||
f6a9efaa DG |
1247 | rcu_register_thread(); |
1248 | rcu_thread_online(); | |
1249 | ||
6c71277b | 1250 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_MANAGE); |
927ca06a | 1251 | |
6993eeb3 CB |
1252 | if (testpoint(thread_manage_apps)) { |
1253 | goto error_testpoint; | |
1254 | } | |
1255 | ||
840cb59c | 1256 | health_code_update(); |
44a5e5eb | 1257 | |
d0b96690 | 1258 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1259 | if (ret < 0) { |
76d7553f | 1260 | goto error_poll_create; |
5eb91c98 | 1261 | } |
099e26bd | 1262 | |
5eb91c98 DG |
1263 | ret = lttng_poll_add(&events, apps_cmd_pipe[0], LPOLLIN | LPOLLRDHUP); |
1264 | if (ret < 0) { | |
1265 | goto error; | |
1266 | } | |
099e26bd | 1267 | |
6993eeb3 CB |
1268 | if (testpoint(thread_manage_apps_before_loop)) { |
1269 | goto error; | |
1270 | } | |
8ac94142 | 1271 | |
840cb59c | 1272 | health_code_update(); |
44a5e5eb | 1273 | |
5eb91c98 | 1274 | while (1) { |
d21b0d71 | 1275 | DBG("Apps thread polling on %d fds", LTTNG_POLL_GETNB(&events)); |
099e26bd DG |
1276 | |
1277 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1278 | restart: |
a78af745 | 1279 | health_poll_entry(); |
5eb91c98 | 1280 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1281 | health_poll_exit(); |
099e26bd | 1282 | if (ret < 0) { |
88f2b785 MD |
1283 | /* |
1284 | * Restart interrupted system call. | |
1285 | */ | |
1286 | if (errno == EINTR) { | |
1287 | goto restart; | |
1288 | } | |
099e26bd DG |
1289 | goto error; |
1290 | } | |
1291 | ||
0d9c5d77 DG |
1292 | nb_fd = ret; |
1293 | ||
5eb91c98 DG |
1294 | for (i = 0; i < nb_fd; i++) { |
1295 | /* Fetch once the poll data */ | |
1296 | revents = LTTNG_POLL_GETEV(&events, i); | |
1297 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
1298 | ||
840cb59c | 1299 | health_code_update(); |
44a5e5eb | 1300 | |
5eb91c98 | 1301 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1302 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1303 | if (ret) { |
139ac872 MD |
1304 | err = 0; |
1305 | goto exit; | |
5eb91c98 | 1306 | } |
099e26bd | 1307 | |
5eb91c98 DG |
1308 | /* Inspect the apps cmd pipe */ |
1309 | if (pollfd == apps_cmd_pipe[0]) { | |
1310 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1311 | ERR("Apps command pipe error"); | |
0177d773 | 1312 | goto error; |
5eb91c98 | 1313 | } else if (revents & LPOLLIN) { |
d0b96690 DG |
1314 | int sock; |
1315 | ||
5eb91c98 | 1316 | /* Empty pipe */ |
f921c78f | 1317 | do { |
d0b96690 | 1318 | ret = read(apps_cmd_pipe[0], &sock, sizeof(sock)); |
f921c78f | 1319 | } while (ret < 0 && errno == EINTR); |
d0b96690 | 1320 | if (ret < 0 || ret < sizeof(sock)) { |
76d7553f | 1321 | PERROR("read apps cmd pipe"); |
5eb91c98 DG |
1322 | goto error; |
1323 | } | |
099e26bd | 1324 | |
840cb59c | 1325 | health_code_update(); |
44a5e5eb | 1326 | |
ffe60014 | 1327 | /* |
d0b96690 DG |
1328 | * We only monitor the error events of the socket. This |
1329 | * thread does not handle any incoming data from UST | |
1330 | * (POLLIN). | |
ffe60014 | 1331 | */ |
d0b96690 DG |
1332 | ret = lttng_poll_add(&events, sock, |
1333 | LPOLLERR | LPOLLHUP | LPOLLRDHUP); | |
1334 | if (ret < 0) { | |
5eb91c98 | 1335 | goto error; |
e0c7ec2b | 1336 | } |
acc7b41b | 1337 | |
d0b96690 | 1338 | DBG("Apps with sock %d added to poll set", sock); |
487cf67c | 1339 | |
840cb59c | 1340 | health_code_update(); |
44a5e5eb | 1341 | |
5eb91c98 | 1342 | break; |
0177d773 | 1343 | } |
5eb91c98 DG |
1344 | } else { |
1345 | /* | |
54d01ffb DG |
1346 | * At this point, we know that a registered application made |
1347 | * the event at poll_wait. | |
5eb91c98 DG |
1348 | */ |
1349 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1350 | /* Removing from the poll set */ | |
1351 | ret = lttng_poll_del(&events, pollfd); | |
1352 | if (ret < 0) { | |
1353 | goto error; | |
1354 | } | |
099e26bd | 1355 | |
b9d9b220 | 1356 | /* Socket closed on remote end. */ |
56fff090 | 1357 | ust_app_unregister(pollfd); |
5eb91c98 DG |
1358 | break; |
1359 | } | |
099e26bd | 1360 | } |
44a5e5eb | 1361 | |
840cb59c | 1362 | health_code_update(); |
099e26bd | 1363 | } |
099e26bd DG |
1364 | } |
1365 | ||
139ac872 | 1366 | exit: |
099e26bd | 1367 | error: |
5eb91c98 | 1368 | lttng_poll_clean(&events); |
76d7553f | 1369 | error_poll_create: |
6993eeb3 | 1370 | error_testpoint: |
6620da75 DG |
1371 | utils_close_pipe(apps_cmd_pipe); |
1372 | apps_cmd_pipe[0] = apps_cmd_pipe[1] = -1; | |
1373 | ||
1374 | /* | |
1375 | * We don't clean the UST app hash table here since already registered | |
1376 | * applications can still be controlled so let them be until the session | |
1377 | * daemon dies or the applications stop. | |
1378 | */ | |
1379 | ||
139ac872 | 1380 | if (err) { |
840cb59c | 1381 | health_error(); |
139ac872 MD |
1382 | ERR("Health error occurred in %s", __func__); |
1383 | } | |
8782cc74 | 1384 | health_unregister(health_sessiond); |
76d7553f | 1385 | DBG("Application communication apps thread cleanup complete"); |
f6a9efaa DG |
1386 | rcu_thread_offline(); |
1387 | rcu_unregister_thread(); | |
099e26bd DG |
1388 | return NULL; |
1389 | } | |
1390 | ||
d0b96690 | 1391 | /* |
d88aee68 DG |
1392 | * Send a socket to a thread This is called from the dispatch UST registration |
1393 | * thread once all sockets are set for the application. | |
d0b96690 | 1394 | * |
b85dc84c DG |
1395 | * The sock value can be invalid, we don't really care, the thread will handle |
1396 | * it and make the necessary cleanup if so. | |
1397 | * | |
d0b96690 DG |
1398 | * On success, return 0 else a negative value being the errno message of the |
1399 | * write(). | |
1400 | */ | |
d88aee68 | 1401 | static int send_socket_to_thread(int fd, int sock) |
d0b96690 DG |
1402 | { |
1403 | int ret; | |
1404 | ||
b85dc84c DG |
1405 | /* |
1406 | * It's possible that the FD is set as invalid with -1 concurrently just | |
1407 | * before calling this function being a shutdown state of the thread. | |
1408 | */ | |
1409 | if (fd < 0) { | |
1410 | ret = -EBADF; | |
1411 | goto error; | |
1412 | } | |
d0b96690 DG |
1413 | |
1414 | do { | |
d88aee68 | 1415 | ret = write(fd, &sock, sizeof(sock)); |
d0b96690 | 1416 | } while (ret < 0 && errno == EINTR); |
d88aee68 DG |
1417 | if (ret < 0 || ret != sizeof(sock)) { |
1418 | PERROR("write apps pipe %d", fd); | |
d0b96690 DG |
1419 | if (ret < 0) { |
1420 | ret = -errno; | |
1421 | } | |
1422 | goto error; | |
1423 | } | |
1424 | ||
1425 | /* All good. Don't send back the write positive ret value. */ | |
1426 | ret = 0; | |
1427 | error: | |
1428 | return ret; | |
1429 | } | |
1430 | ||
f45e313d DG |
1431 | /* |
1432 | * Sanitize the wait queue of the dispatch registration thread meaning removing | |
1433 | * invalid nodes from it. This is to avoid memory leaks for the case the UST | |
1434 | * notify socket is never received. | |
1435 | */ | |
1436 | static void sanitize_wait_queue(struct ust_reg_wait_queue *wait_queue) | |
1437 | { | |
1438 | int ret, nb_fd = 0, i; | |
1439 | unsigned int fd_added = 0; | |
1440 | struct lttng_poll_event events; | |
1441 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; | |
1442 | ||
1443 | assert(wait_queue); | |
1444 | ||
1445 | lttng_poll_init(&events); | |
1446 | ||
1447 | /* Just skip everything for an empty queue. */ | |
1448 | if (!wait_queue->count) { | |
1449 | goto end; | |
1450 | } | |
1451 | ||
1452 | ret = lttng_poll_create(&events, wait_queue->count, LTTNG_CLOEXEC); | |
1453 | if (ret < 0) { | |
1454 | goto error_create; | |
1455 | } | |
1456 | ||
1457 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1458 | &wait_queue->head, head) { | |
1459 | assert(wait_node->app); | |
1460 | ret = lttng_poll_add(&events, wait_node->app->sock, | |
1461 | LPOLLHUP | LPOLLERR); | |
1462 | if (ret < 0) { | |
1463 | goto error; | |
1464 | } | |
1465 | ||
1466 | fd_added = 1; | |
1467 | } | |
1468 | ||
1469 | if (!fd_added) { | |
1470 | goto end; | |
1471 | } | |
1472 | ||
1473 | /* | |
1474 | * Poll but don't block so we can quickly identify the faulty events and | |
1475 | * clean them afterwards from the wait queue. | |
1476 | */ | |
1477 | ret = lttng_poll_wait(&events, 0); | |
1478 | if (ret < 0) { | |
1479 | goto error; | |
1480 | } | |
1481 | nb_fd = ret; | |
1482 | ||
1483 | for (i = 0; i < nb_fd; i++) { | |
1484 | /* Get faulty FD. */ | |
1485 | uint32_t revents = LTTNG_POLL_GETEV(&events, i); | |
1486 | int pollfd = LTTNG_POLL_GETFD(&events, i); | |
1487 | ||
1488 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
1489 | &wait_queue->head, head) { | |
1490 | if (pollfd == wait_node->app->sock && | |
1491 | (revents & (LPOLLHUP | LPOLLERR))) { | |
1492 | cds_list_del(&wait_node->head); | |
1493 | wait_queue->count--; | |
1494 | ust_app_destroy(wait_node->app); | |
1495 | free(wait_node); | |
1496 | break; | |
1497 | } | |
1498 | } | |
1499 | } | |
1500 | ||
1501 | if (nb_fd > 0) { | |
1502 | DBG("Wait queue sanitized, %d node were cleaned up", nb_fd); | |
1503 | } | |
1504 | ||
1505 | end: | |
1506 | lttng_poll_clean(&events); | |
1507 | return; | |
1508 | ||
1509 | error: | |
1510 | lttng_poll_clean(&events); | |
1511 | error_create: | |
1512 | ERR("Unable to sanitize wait queue"); | |
1513 | return; | |
1514 | } | |
1515 | ||
099e26bd DG |
1516 | /* |
1517 | * Dispatch request from the registration threads to the application | |
1518 | * communication thread. | |
1519 | */ | |
1520 | static void *thread_dispatch_ust_registration(void *data) | |
1521 | { | |
12e2b881 | 1522 | int ret, err = -1; |
099e26bd DG |
1523 | struct cds_wfq_node *node; |
1524 | struct ust_command *ust_cmd = NULL; | |
f45e313d DG |
1525 | struct ust_reg_wait_node *wait_node = NULL, *tmp_wait_node; |
1526 | struct ust_reg_wait_queue wait_queue = { | |
1527 | .count = 0, | |
1528 | }; | |
d0b96690 | 1529 | |
6c71277b | 1530 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG_DISPATCH); |
12e2b881 MD |
1531 | |
1532 | health_code_update(); | |
1533 | ||
f45e313d | 1534 | CDS_INIT_LIST_HEAD(&wait_queue.head); |
099e26bd DG |
1535 | |
1536 | DBG("[thread] Dispatch UST command started"); | |
1537 | ||
26c9d55e | 1538 | while (!CMM_LOAD_SHARED(dispatch_thread_exit)) { |
12e2b881 MD |
1539 | health_code_update(); |
1540 | ||
099e26bd DG |
1541 | /* Atomically prepare the queue futex */ |
1542 | futex_nto1_prepare(&ust_cmd_queue.futex); | |
1543 | ||
1544 | do { | |
d0b96690 | 1545 | struct ust_app *app = NULL; |
7972aab2 | 1546 | ust_cmd = NULL; |
d0b96690 | 1547 | |
f45e313d DG |
1548 | /* |
1549 | * Make sure we don't have node(s) that have hung up before receiving | |
1550 | * the notify socket. This is to clean the list in order to avoid | |
1551 | * memory leaks from notify socket that are never seen. | |
1552 | */ | |
1553 | sanitize_wait_queue(&wait_queue); | |
1554 | ||
12e2b881 | 1555 | health_code_update(); |
099e26bd DG |
1556 | /* Dequeue command for registration */ |
1557 | node = cds_wfq_dequeue_blocking(&ust_cmd_queue.queue); | |
1558 | if (node == NULL) { | |
00a17c97 | 1559 | DBG("Woken up but nothing in the UST command queue"); |
099e26bd DG |
1560 | /* Continue thread execution */ |
1561 | break; | |
1562 | } | |
1563 | ||
1564 | ust_cmd = caa_container_of(node, struct ust_command, node); | |
1565 | ||
2f50c8a3 DG |
1566 | DBG("Dispatching UST registration pid:%d ppid:%d uid:%d" |
1567 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1568 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1569 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1570 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1571 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
d0b96690 DG |
1572 | |
1573 | if (ust_cmd->reg_msg.type == USTCTL_SOCKET_CMD) { | |
1574 | wait_node = zmalloc(sizeof(*wait_node)); | |
1575 | if (!wait_node) { | |
1576 | PERROR("zmalloc wait_node dispatch"); | |
020d7f60 DG |
1577 | ret = close(ust_cmd->sock); |
1578 | if (ret < 0) { | |
1579 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1580 | } | |
51dec90d | 1581 | lttng_fd_put(LTTNG_FD_APPS, 1); |
7972aab2 | 1582 | free(ust_cmd); |
d0b96690 DG |
1583 | goto error; |
1584 | } | |
1585 | CDS_INIT_LIST_HEAD(&wait_node->head); | |
1586 | ||
1587 | /* Create application object if socket is CMD. */ | |
1588 | wait_node->app = ust_app_create(&ust_cmd->reg_msg, | |
1589 | ust_cmd->sock); | |
1590 | if (!wait_node->app) { | |
1591 | ret = close(ust_cmd->sock); | |
1592 | if (ret < 0) { | |
1593 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
6620da75 | 1594 | } |
51dec90d | 1595 | lttng_fd_put(LTTNG_FD_APPS, 1); |
d88aee68 | 1596 | free(wait_node); |
7972aab2 | 1597 | free(ust_cmd); |
d0b96690 DG |
1598 | continue; |
1599 | } | |
1600 | /* | |
1601 | * Add application to the wait queue so we can set the notify | |
1602 | * socket before putting this object in the global ht. | |
1603 | */ | |
f45e313d DG |
1604 | cds_list_add(&wait_node->head, &wait_queue.head); |
1605 | wait_queue.count++; | |
d0b96690 | 1606 | |
7972aab2 | 1607 | free(ust_cmd); |
d0b96690 DG |
1608 | /* |
1609 | * We have to continue here since we don't have the notify | |
1610 | * socket and the application MUST be added to the hash table | |
1611 | * only at that moment. | |
1612 | */ | |
1613 | continue; | |
1614 | } else { | |
1615 | /* | |
1616 | * Look for the application in the local wait queue and set the | |
1617 | * notify socket if found. | |
1618 | */ | |
d88aee68 | 1619 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, |
f45e313d | 1620 | &wait_queue.head, head) { |
12e2b881 | 1621 | health_code_update(); |
d0b96690 DG |
1622 | if (wait_node->app->pid == ust_cmd->reg_msg.pid) { |
1623 | wait_node->app->notify_sock = ust_cmd->sock; | |
1624 | cds_list_del(&wait_node->head); | |
f45e313d | 1625 | wait_queue.count--; |
d0b96690 DG |
1626 | app = wait_node->app; |
1627 | free(wait_node); | |
1628 | DBG3("UST app notify socket %d is set", ust_cmd->sock); | |
1629 | break; | |
1630 | } | |
1631 | } | |
020d7f60 DG |
1632 | |
1633 | /* | |
1634 | * With no application at this stage the received socket is | |
1635 | * basically useless so close it before we free the cmd data | |
1636 | * structure for good. | |
1637 | */ | |
1638 | if (!app) { | |
1639 | ret = close(ust_cmd->sock); | |
1640 | if (ret < 0) { | |
1641 | PERROR("close ust sock dispatch %d", ust_cmd->sock); | |
1642 | } | |
51dec90d | 1643 | lttng_fd_put(LTTNG_FD_APPS, 1); |
020d7f60 | 1644 | } |
7972aab2 | 1645 | free(ust_cmd); |
d0b96690 DG |
1646 | } |
1647 | ||
1648 | if (app) { | |
d0b96690 DG |
1649 | /* |
1650 | * @session_lock_list | |
1651 | * | |
1652 | * Lock the global session list so from the register up to the | |
1653 | * registration done message, no thread can see the application | |
1654 | * and change its state. | |
1655 | */ | |
1656 | session_lock_list(); | |
1657 | rcu_read_lock(); | |
d88aee68 | 1658 | |
d0b96690 DG |
1659 | /* |
1660 | * Add application to the global hash table. This needs to be | |
1661 | * done before the update to the UST registry can locate the | |
1662 | * application. | |
1663 | */ | |
1664 | ust_app_add(app); | |
d88aee68 DG |
1665 | |
1666 | /* Set app version. This call will print an error if needed. */ | |
1667 | (void) ust_app_version(app); | |
1668 | ||
1669 | /* Send notify socket through the notify pipe. */ | |
1670 | ret = send_socket_to_thread(apps_cmd_notify_pipe[1], | |
1671 | app->notify_sock); | |
1672 | if (ret < 0) { | |
1673 | rcu_read_unlock(); | |
1674 | session_unlock_list(); | |
b85dc84c DG |
1675 | /* |
1676 | * No notify thread, stop the UST tracing. However, this is | |
1677 | * not an internal error of the this thread thus setting | |
1678 | * the health error code to a normal exit. | |
1679 | */ | |
1680 | err = 0; | |
d88aee68 | 1681 | goto error; |
6620da75 | 1682 | } |
d88aee68 | 1683 | |
d0b96690 DG |
1684 | /* |
1685 | * Update newly registered application with the tracing | |
1686 | * registry info already enabled information. | |
1687 | */ | |
1688 | update_ust_app(app->sock); | |
d88aee68 DG |
1689 | |
1690 | /* | |
1691 | * Don't care about return value. Let the manage apps threads | |
1692 | * handle app unregistration upon socket close. | |
1693 | */ | |
1694 | (void) ust_app_register_done(app->sock); | |
1695 | ||
1696 | /* | |
1697 | * Even if the application socket has been closed, send the app | |
1698 | * to the thread and unregistration will take place at that | |
1699 | * place. | |
1700 | */ | |
1701 | ret = send_socket_to_thread(apps_cmd_pipe[1], app->sock); | |
d0b96690 | 1702 | if (ret < 0) { |
d88aee68 DG |
1703 | rcu_read_unlock(); |
1704 | session_unlock_list(); | |
b85dc84c DG |
1705 | /* |
1706 | * No apps. thread, stop the UST tracing. However, this is | |
1707 | * not an internal error of the this thread thus setting | |
1708 | * the health error code to a normal exit. | |
1709 | */ | |
1710 | err = 0; | |
d88aee68 | 1711 | goto error; |
d0b96690 | 1712 | } |
d88aee68 | 1713 | |
d0b96690 DG |
1714 | rcu_read_unlock(); |
1715 | session_unlock_list(); | |
099e26bd | 1716 | } |
099e26bd DG |
1717 | } while (node != NULL); |
1718 | ||
12e2b881 | 1719 | health_poll_entry(); |
099e26bd DG |
1720 | /* Futex wait on queue. Blocking call on futex() */ |
1721 | futex_nto1_wait(&ust_cmd_queue.futex); | |
12e2b881 | 1722 | health_poll_exit(); |
099e26bd | 1723 | } |
12e2b881 MD |
1724 | /* Normal exit, no error */ |
1725 | err = 0; | |
099e26bd DG |
1726 | |
1727 | error: | |
d88aee68 DG |
1728 | /* Clean up wait queue. */ |
1729 | cds_list_for_each_entry_safe(wait_node, tmp_wait_node, | |
f45e313d | 1730 | &wait_queue.head, head) { |
d88aee68 | 1731 | cds_list_del(&wait_node->head); |
f45e313d | 1732 | wait_queue.count--; |
d88aee68 DG |
1733 | free(wait_node); |
1734 | } | |
1735 | ||
099e26bd | 1736 | DBG("Dispatch thread dying"); |
12e2b881 MD |
1737 | if (err) { |
1738 | health_error(); | |
1739 | ERR("Health error occurred in %s", __func__); | |
1740 | } | |
8782cc74 | 1741 | health_unregister(health_sessiond); |
099e26bd DG |
1742 | return NULL; |
1743 | } | |
1744 | ||
1745 | /* | |
1746 | * This thread manage application registration. | |
1747 | */ | |
1748 | static void *thread_registration_apps(void *data) | |
1d4b027a | 1749 | { |
139ac872 | 1750 | int sock = -1, i, ret, pollfd, err = -1; |
5eb91c98 DG |
1751 | uint32_t revents, nb_fd; |
1752 | struct lttng_poll_event events; | |
099e26bd DG |
1753 | /* |
1754 | * Get allocated in this thread, enqueued to a global queue, dequeued and | |
1755 | * freed in the manage apps thread. | |
1756 | */ | |
1757 | struct ust_command *ust_cmd = NULL; | |
1d4b027a | 1758 | |
099e26bd | 1759 | DBG("[thread] Manage application registration started"); |
1d4b027a | 1760 | |
6c71277b | 1761 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_APP_REG); |
927ca06a | 1762 | |
6993eeb3 CB |
1763 | if (testpoint(thread_registration_apps)) { |
1764 | goto error_testpoint; | |
1765 | } | |
8ac94142 | 1766 | |
1d4b027a DG |
1767 | ret = lttcomm_listen_unix_sock(apps_sock); |
1768 | if (ret < 0) { | |
76d7553f | 1769 | goto error_listen; |
1d4b027a DG |
1770 | } |
1771 | ||
5eb91c98 DG |
1772 | /* |
1773 | * Pass 2 as size here for the thread quit pipe and apps socket. Nothing | |
1774 | * more will be added to this poll set. | |
1775 | */ | |
d0b96690 | 1776 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 1777 | if (ret < 0) { |
76d7553f | 1778 | goto error_create_poll; |
5eb91c98 | 1779 | } |
273ea72c | 1780 | |
5eb91c98 DG |
1781 | /* Add the application registration socket */ |
1782 | ret = lttng_poll_add(&events, apps_sock, LPOLLIN | LPOLLRDHUP); | |
1783 | if (ret < 0) { | |
76d7553f | 1784 | goto error_poll_add; |
5eb91c98 | 1785 | } |
273ea72c | 1786 | |
1d4b027a | 1787 | /* Notify all applications to register */ |
0fdd1e2c DG |
1788 | ret = notify_ust_apps(1); |
1789 | if (ret < 0) { | |
1790 | ERR("Failed to notify applications or create the wait shared memory.\n" | |
54d01ffb DG |
1791 | "Execution continues but there might be problem for already\n" |
1792 | "running applications that wishes to register."); | |
0fdd1e2c | 1793 | } |
1d4b027a DG |
1794 | |
1795 | while (1) { | |
1796 | DBG("Accepting application registration"); | |
273ea72c DG |
1797 | |
1798 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 1799 | restart: |
a78af745 | 1800 | health_poll_entry(); |
5eb91c98 | 1801 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 1802 | health_poll_exit(); |
273ea72c | 1803 | if (ret < 0) { |
88f2b785 MD |
1804 | /* |
1805 | * Restart interrupted system call. | |
1806 | */ | |
1807 | if (errno == EINTR) { | |
1808 | goto restart; | |
1809 | } | |
273ea72c DG |
1810 | goto error; |
1811 | } | |
1812 | ||
0d9c5d77 DG |
1813 | nb_fd = ret; |
1814 | ||
5eb91c98 | 1815 | for (i = 0; i < nb_fd; i++) { |
840cb59c | 1816 | health_code_update(); |
139ac872 | 1817 | |
5eb91c98 DG |
1818 | /* Fetch once the poll data */ |
1819 | revents = LTTNG_POLL_GETEV(&events, i); | |
1820 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
273ea72c | 1821 | |
5eb91c98 | 1822 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 1823 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 1824 | if (ret) { |
139ac872 MD |
1825 | err = 0; |
1826 | goto exit; | |
90014c57 | 1827 | } |
1d4b027a | 1828 | |
5eb91c98 DG |
1829 | /* Event on the registration socket */ |
1830 | if (pollfd == apps_sock) { | |
1831 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
1832 | ERR("Register apps socket poll error"); | |
1833 | goto error; | |
1834 | } else if (revents & LPOLLIN) { | |
1835 | sock = lttcomm_accept_unix_sock(apps_sock); | |
1836 | if (sock < 0) { | |
1837 | goto error; | |
1838 | } | |
099e26bd | 1839 | |
16c5c8fa DG |
1840 | /* |
1841 | * Set socket timeout for both receiving and ending. | |
1842 | * app_socket_timeout is in seconds, whereas | |
1843 | * lttcomm_setsockopt_rcv_timeout and | |
1844 | * lttcomm_setsockopt_snd_timeout expect msec as | |
1845 | * parameter. | |
1846 | */ | |
1847 | (void) lttcomm_setsockopt_rcv_timeout(sock, | |
1848 | app_socket_timeout * 1000); | |
1849 | (void) lttcomm_setsockopt_snd_timeout(sock, | |
1850 | app_socket_timeout * 1000); | |
1851 | ||
b662582b DG |
1852 | /* |
1853 | * Set the CLOEXEC flag. Return code is useless because | |
1854 | * either way, the show must go on. | |
1855 | */ | |
1856 | (void) utils_set_fd_cloexec(sock); | |
1857 | ||
5eb91c98 | 1858 | /* Create UST registration command for enqueuing */ |
ba7f0ae5 | 1859 | ust_cmd = zmalloc(sizeof(struct ust_command)); |
5eb91c98 | 1860 | if (ust_cmd == NULL) { |
76d7553f | 1861 | PERROR("ust command zmalloc"); |
5eb91c98 DG |
1862 | goto error; |
1863 | } | |
1d4b027a | 1864 | |
5eb91c98 DG |
1865 | /* |
1866 | * Using message-based transmissions to ensure we don't | |
1867 | * have to deal with partially received messages. | |
1868 | */ | |
4063050c MD |
1869 | ret = lttng_fd_get(LTTNG_FD_APPS, 1); |
1870 | if (ret < 0) { | |
1871 | ERR("Exhausted file descriptors allowed for applications."); | |
1872 | free(ust_cmd); | |
1873 | ret = close(sock); | |
1874 | if (ret) { | |
1875 | PERROR("close"); | |
1876 | } | |
1877 | sock = -1; | |
1878 | continue; | |
1879 | } | |
d88aee68 | 1880 | |
840cb59c | 1881 | health_code_update(); |
d0b96690 DG |
1882 | ret = ust_app_recv_registration(sock, &ust_cmd->reg_msg); |
1883 | if (ret < 0) { | |
5eb91c98 | 1884 | free(ust_cmd); |
d0b96690 | 1885 | /* Close socket of the application. */ |
76d7553f MD |
1886 | ret = close(sock); |
1887 | if (ret) { | |
1888 | PERROR("close"); | |
1889 | } | |
4063050c | 1890 | lttng_fd_put(LTTNG_FD_APPS, 1); |
76d7553f | 1891 | sock = -1; |
5eb91c98 DG |
1892 | continue; |
1893 | } | |
840cb59c | 1894 | health_code_update(); |
099e26bd | 1895 | |
5eb91c98 | 1896 | ust_cmd->sock = sock; |
34a2494f | 1897 | sock = -1; |
099e26bd | 1898 | |
5eb91c98 DG |
1899 | DBG("UST registration received with pid:%d ppid:%d uid:%d" |
1900 | " gid:%d sock:%d name:%s (version %d.%d)", | |
1901 | ust_cmd->reg_msg.pid, ust_cmd->reg_msg.ppid, | |
1902 | ust_cmd->reg_msg.uid, ust_cmd->reg_msg.gid, | |
1903 | ust_cmd->sock, ust_cmd->reg_msg.name, | |
1904 | ust_cmd->reg_msg.major, ust_cmd->reg_msg.minor); | |
54d01ffb | 1905 | |
5eb91c98 DG |
1906 | /* |
1907 | * Lock free enqueue the registration request. The red pill | |
54d01ffb | 1908 | * has been taken! This apps will be part of the *system*. |
5eb91c98 DG |
1909 | */ |
1910 | cds_wfq_enqueue(&ust_cmd_queue.queue, &ust_cmd->node); | |
1911 | ||
1912 | /* | |
1913 | * Wake the registration queue futex. Implicit memory | |
1914 | * barrier with the exchange in cds_wfq_enqueue. | |
1915 | */ | |
1916 | futex_nto1_wake(&ust_cmd_queue.futex); | |
1917 | } | |
1918 | } | |
90014c57 | 1919 | } |
1d4b027a DG |
1920 | } |
1921 | ||
139ac872 | 1922 | exit: |
1d4b027a | 1923 | error: |
139ac872 | 1924 | if (err) { |
840cb59c | 1925 | health_error(); |
139ac872 MD |
1926 | ERR("Health error occurred in %s", __func__); |
1927 | } | |
139ac872 | 1928 | |
0fdd1e2c DG |
1929 | /* Notify that the registration thread is gone */ |
1930 | notify_ust_apps(0); | |
1931 | ||
a4b35e07 | 1932 | if (apps_sock >= 0) { |
76d7553f MD |
1933 | ret = close(apps_sock); |
1934 | if (ret) { | |
1935 | PERROR("close"); | |
1936 | } | |
a4b35e07 | 1937 | } |
46c3f085 | 1938 | if (sock >= 0) { |
76d7553f MD |
1939 | ret = close(sock); |
1940 | if (ret) { | |
1941 | PERROR("close"); | |
1942 | } | |
4063050c | 1943 | lttng_fd_put(LTTNG_FD_APPS, 1); |
a4b35e07 | 1944 | } |
273ea72c | 1945 | unlink(apps_unix_sock_path); |
0fdd1e2c | 1946 | |
76d7553f | 1947 | error_poll_add: |
5eb91c98 | 1948 | lttng_poll_clean(&events); |
76d7553f MD |
1949 | error_listen: |
1950 | error_create_poll: | |
6993eeb3 | 1951 | error_testpoint: |
76d7553f | 1952 | DBG("UST Registration thread cleanup complete"); |
8782cc74 | 1953 | health_unregister(health_sessiond); |
5eb91c98 | 1954 | |
1d4b027a DG |
1955 | return NULL; |
1956 | } | |
1957 | ||
8c0faa1d | 1958 | /* |
3bd1e081 | 1959 | * Start the thread_manage_consumer. This must be done after a lttng-consumerd |
d063d709 | 1960 | * exec or it will fails. |
8c0faa1d | 1961 | */ |
3bd1e081 | 1962 | static int spawn_consumer_thread(struct consumer_data *consumer_data) |
8c0faa1d | 1963 | { |
a23ec3a7 | 1964 | int ret, clock_ret; |
ee0b0061 DG |
1965 | struct timespec timeout; |
1966 | ||
a23ec3a7 DG |
1967 | /* Make sure we set the readiness flag to 0 because we are NOT ready */ |
1968 | consumer_data->consumer_thread_is_ready = 0; | |
8c0faa1d | 1969 | |
a23ec3a7 DG |
1970 | /* Setup pthread condition */ |
1971 | ret = pthread_condattr_init(&consumer_data->condattr); | |
1972 | if (ret != 0) { | |
1973 | errno = ret; | |
1974 | PERROR("pthread_condattr_init consumer data"); | |
1975 | goto error; | |
1976 | } | |
1977 | ||
1978 | /* | |
1979 | * Set the monotonic clock in order to make sure we DO NOT jump in time | |
1980 | * between the clock_gettime() call and the timedwait call. See bug #324 | |
1981 | * for a more details and how we noticed it. | |
1982 | */ | |
1983 | ret = pthread_condattr_setclock(&consumer_data->condattr, CLOCK_MONOTONIC); | |
1984 | if (ret != 0) { | |
1985 | errno = ret; | |
1986 | PERROR("pthread_condattr_setclock consumer data"); | |
ee0b0061 DG |
1987 | goto error; |
1988 | } | |
8c0faa1d | 1989 | |
a23ec3a7 DG |
1990 | ret = pthread_cond_init(&consumer_data->cond, &consumer_data->condattr); |
1991 | if (ret != 0) { | |
1992 | errno = ret; | |
1993 | PERROR("pthread_cond_init consumer data"); | |
1994 | goto error; | |
1995 | } | |
1996 | ||
1997 | ret = pthread_create(&consumer_data->thread, NULL, thread_manage_consumer, | |
1998 | consumer_data); | |
8c0faa1d | 1999 | if (ret != 0) { |
3bd1e081 | 2000 | PERROR("pthread_create consumer"); |
ee0b0061 | 2001 | ret = -1; |
8c0faa1d DG |
2002 | goto error; |
2003 | } | |
2004 | ||
a23ec3a7 DG |
2005 | /* We are about to wait on a pthread condition */ |
2006 | pthread_mutex_lock(&consumer_data->cond_mutex); | |
2007 | ||
ee0b0061 | 2008 | /* Get time for sem_timedwait absolute timeout */ |
a23ec3a7 DG |
2009 | clock_ret = clock_gettime(CLOCK_MONOTONIC, &timeout); |
2010 | /* | |
2011 | * Set the timeout for the condition timed wait even if the clock gettime | |
2012 | * call fails since we might loop on that call and we want to avoid to | |
2013 | * increment the timeout too many times. | |
2014 | */ | |
2015 | timeout.tv_sec += DEFAULT_SEM_WAIT_TIMEOUT; | |
2016 | ||
2017 | /* | |
2018 | * The following loop COULD be skipped in some conditions so this is why we | |
2019 | * set ret to 0 in order to make sure at least one round of the loop is | |
2020 | * done. | |
2021 | */ | |
2022 | ret = 0; | |
2023 | ||
2024 | /* | |
2025 | * Loop until the condition is reached or when a timeout is reached. Note | |
2026 | * that the pthread_cond_timedwait(P) man page specifies that EINTR can NOT | |
2027 | * be returned but the pthread_cond(3), from the glibc-doc, says that it is | |
2028 | * possible. This loop does not take any chances and works with both of | |
2029 | * them. | |
2030 | */ | |
2031 | while (!consumer_data->consumer_thread_is_ready && ret != ETIMEDOUT) { | |
2032 | if (clock_ret < 0) { | |
2033 | PERROR("clock_gettime spawn consumer"); | |
2034 | /* Infinite wait for the consumerd thread to be ready */ | |
2035 | ret = pthread_cond_wait(&consumer_data->cond, | |
2036 | &consumer_data->cond_mutex); | |
2037 | } else { | |
2038 | ret = pthread_cond_timedwait(&consumer_data->cond, | |
2039 | &consumer_data->cond_mutex, &timeout); | |
2040 | } | |
ee0b0061 | 2041 | } |
8c0faa1d | 2042 | |
a23ec3a7 DG |
2043 | /* Release the pthread condition */ |
2044 | pthread_mutex_unlock(&consumer_data->cond_mutex); | |
2045 | ||
2046 | if (ret != 0) { | |
2047 | errno = ret; | |
2048 | if (ret == ETIMEDOUT) { | |
ee0b0061 DG |
2049 | /* |
2050 | * Call has timed out so we kill the kconsumerd_thread and return | |
2051 | * an error. | |
2052 | */ | |
a23ec3a7 DG |
2053 | ERR("Condition timed out. The consumer thread was never ready." |
2054 | " Killing it"); | |
3bd1e081 | 2055 | ret = pthread_cancel(consumer_data->thread); |
ee0b0061 | 2056 | if (ret < 0) { |
3bd1e081 | 2057 | PERROR("pthread_cancel consumer thread"); |
ee0b0061 DG |
2058 | } |
2059 | } else { | |
a23ec3a7 | 2060 | PERROR("pthread_cond_wait failed consumer thread"); |
ee0b0061 DG |
2061 | } |
2062 | goto error; | |
2063 | } | |
2064 | ||
3bd1e081 MD |
2065 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2066 | if (consumer_data->pid == 0) { | |
a23ec3a7 | 2067 | ERR("Consumerd did not start"); |
3bd1e081 | 2068 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 DG |
2069 | goto error; |
2070 | } | |
3bd1e081 | 2071 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
712ea556 | 2072 | |
8c0faa1d DG |
2073 | return 0; |
2074 | ||
2075 | error: | |
2076 | return ret; | |
2077 | } | |
2078 | ||
d9800920 | 2079 | /* |
3bd1e081 | 2080 | * Join consumer thread |
d9800920 | 2081 | */ |
3bd1e081 | 2082 | static int join_consumer_thread(struct consumer_data *consumer_data) |
cf3af59e MD |
2083 | { |
2084 | void *status; | |
cf3af59e | 2085 | |
e8209f6b DG |
2086 | /* Consumer pid must be a real one. */ |
2087 | if (consumer_data->pid > 0) { | |
c617c0c6 | 2088 | int ret; |
3bd1e081 | 2089 | ret = kill(consumer_data->pid, SIGTERM); |
cf3af59e | 2090 | if (ret) { |
3bd1e081 | 2091 | ERR("Error killing consumer daemon"); |
cf3af59e MD |
2092 | return ret; |
2093 | } | |
3bd1e081 | 2094 | return pthread_join(consumer_data->thread, &status); |
cf3af59e MD |
2095 | } else { |
2096 | return 0; | |
2097 | } | |
2098 | } | |
2099 | ||
8c0faa1d | 2100 | /* |
3bd1e081 | 2101 | * Fork and exec a consumer daemon (consumerd). |
8c0faa1d | 2102 | * |
d063d709 | 2103 | * Return pid if successful else -1. |
8c0faa1d | 2104 | */ |
3bd1e081 | 2105 | static pid_t spawn_consumerd(struct consumer_data *consumer_data) |
8c0faa1d DG |
2106 | { |
2107 | int ret; | |
2108 | pid_t pid; | |
94c55f17 | 2109 | const char *consumer_to_use; |
53086306 | 2110 | const char *verbosity; |
94c55f17 | 2111 | struct stat st; |
8c0faa1d | 2112 | |
3bd1e081 | 2113 | DBG("Spawning consumerd"); |
c49dc785 | 2114 | |
8c0faa1d DG |
2115 | pid = fork(); |
2116 | if (pid == 0) { | |
2117 | /* | |
3bd1e081 | 2118 | * Exec consumerd. |
8c0faa1d | 2119 | */ |
daee5345 | 2120 | if (opt_verbose_consumer) { |
53086306 DG |
2121 | verbosity = "--verbose"; |
2122 | } else { | |
2123 | verbosity = "--quiet"; | |
2124 | } | |
3bd1e081 MD |
2125 | switch (consumer_data->type) { |
2126 | case LTTNG_CONSUMER_KERNEL: | |
94c55f17 | 2127 | /* |
c7704d57 DG |
2128 | * Find out which consumerd to execute. We will first try the |
2129 | * 64-bit path, then the sessiond's installation directory, and | |
2130 | * fallback on the 32-bit one, | |
94c55f17 | 2131 | */ |
63a799e8 AM |
2132 | DBG3("Looking for a kernel consumer at these locations:"); |
2133 | DBG3(" 1) %s", consumerd64_bin); | |
2134 | DBG3(" 2) %s/%s", INSTALL_BIN_PATH, CONSUMERD_FILE); | |
2135 | DBG3(" 3) %s", consumerd32_bin); | |
94c55f17 | 2136 | if (stat(consumerd64_bin, &st) == 0) { |
63a799e8 | 2137 | DBG3("Found location #1"); |
94c55f17 | 2138 | consumer_to_use = consumerd64_bin; |
94c55f17 | 2139 | } else if (stat(INSTALL_BIN_PATH "/" CONSUMERD_FILE, &st) == 0) { |
63a799e8 | 2140 | DBG3("Found location #2"); |
94c55f17 | 2141 | consumer_to_use = INSTALL_BIN_PATH "/" CONSUMERD_FILE; |
eb1e0bd4 | 2142 | } else if (stat(consumerd32_bin, &st) == 0) { |
63a799e8 | 2143 | DBG3("Found location #3"); |
eb1e0bd4 | 2144 | consumer_to_use = consumerd32_bin; |
94c55f17 | 2145 | } else { |
63a799e8 | 2146 | DBG("Could not find any valid consumerd executable"); |
94c55f17 AM |
2147 | break; |
2148 | } | |
2149 | DBG("Using kernel consumer at: %s", consumer_to_use); | |
2150 | execl(consumer_to_use, | |
2151 | "lttng-consumerd", verbosity, "-k", | |
2152 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, | |
2153 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2154 | "--group", tracing_group_name, |
94c55f17 | 2155 | NULL); |
3bd1e081 | 2156 | break; |
7753dea8 MD |
2157 | case LTTNG_CONSUMER64_UST: |
2158 | { | |
b1e0b6b6 | 2159 | char *tmpnew = NULL; |
8f4905da MD |
2160 | |
2161 | if (consumerd64_libdir[0] != '\0') { | |
2162 | char *tmp; | |
2163 | size_t tmplen; | |
2164 | ||
2165 | tmp = getenv("LD_LIBRARY_PATH"); | |
2166 | if (!tmp) { | |
2167 | tmp = ""; | |
2168 | } | |
2169 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2170 | + strlen(consumerd64_libdir) + 1 /* : */ + strlen(tmp); | |
2171 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2172 | if (!tmpnew) { | |
2173 | ret = -ENOMEM; | |
2174 | goto error; | |
2175 | } | |
2176 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2177 | strcat(tmpnew, consumerd64_libdir); | |
2178 | if (tmp[0] != '\0') { | |
2179 | strcat(tmpnew, ":"); | |
2180 | strcat(tmpnew, tmp); | |
2181 | } | |
2182 | ret = putenv(tmpnew); | |
2183 | if (ret) { | |
2184 | ret = -errno; | |
c6f76da9 | 2185 | free(tmpnew); |
8f4905da MD |
2186 | goto error; |
2187 | } | |
2188 | } | |
94c55f17 | 2189 | DBG("Using 64-bit UST consumer at: %s", consumerd64_bin); |
a5a6aff3 | 2190 | ret = execl(consumerd64_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2191 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2192 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2193 | "--group", tracing_group_name, |
7753dea8 | 2194 | NULL); |
8f4905da MD |
2195 | if (consumerd64_libdir[0] != '\0') { |
2196 | free(tmpnew); | |
2197 | } | |
2198 | if (ret) { | |
2199 | goto error; | |
2200 | } | |
3bd1e081 | 2201 | break; |
7753dea8 MD |
2202 | } |
2203 | case LTTNG_CONSUMER32_UST: | |
2204 | { | |
937dde8e | 2205 | char *tmpnew = NULL; |
8f4905da MD |
2206 | |
2207 | if (consumerd32_libdir[0] != '\0') { | |
2208 | char *tmp; | |
2209 | size_t tmplen; | |
2210 | ||
2211 | tmp = getenv("LD_LIBRARY_PATH"); | |
2212 | if (!tmp) { | |
2213 | tmp = ""; | |
2214 | } | |
2215 | tmplen = strlen("LD_LIBRARY_PATH=") | |
2216 | + strlen(consumerd32_libdir) + 1 /* : */ + strlen(tmp); | |
2217 | tmpnew = zmalloc(tmplen + 1 /* \0 */); | |
2218 | if (!tmpnew) { | |
2219 | ret = -ENOMEM; | |
2220 | goto error; | |
2221 | } | |
2222 | strcpy(tmpnew, "LD_LIBRARY_PATH="); | |
2223 | strcat(tmpnew, consumerd32_libdir); | |
2224 | if (tmp[0] != '\0') { | |
2225 | strcat(tmpnew, ":"); | |
2226 | strcat(tmpnew, tmp); | |
2227 | } | |
2228 | ret = putenv(tmpnew); | |
2229 | if (ret) { | |
2230 | ret = -errno; | |
c6f76da9 | 2231 | free(tmpnew); |
8f4905da MD |
2232 | goto error; |
2233 | } | |
2234 | } | |
94c55f17 | 2235 | DBG("Using 32-bit UST consumer at: %s", consumerd32_bin); |
a5a6aff3 | 2236 | ret = execl(consumerd32_bin, "lttng-consumerd", verbosity, "-u", |
7753dea8 MD |
2237 | "--consumerd-cmd-sock", consumer_data->cmd_unix_sock_path, |
2238 | "--consumerd-err-sock", consumer_data->err_unix_sock_path, | |
6c71277b | 2239 | "--group", tracing_group_name, |
7753dea8 | 2240 | NULL); |
8f4905da MD |
2241 | if (consumerd32_libdir[0] != '\0') { |
2242 | free(tmpnew); | |
2243 | } | |
2244 | if (ret) { | |
2245 | goto error; | |
2246 | } | |
7753dea8 MD |
2247 | break; |
2248 | } | |
3bd1e081 | 2249 | default: |
76d7553f | 2250 | PERROR("unknown consumer type"); |
3bd1e081 MD |
2251 | exit(EXIT_FAILURE); |
2252 | } | |
8c0faa1d | 2253 | if (errno != 0) { |
76d7553f | 2254 | PERROR("kernel start consumer exec"); |
8c0faa1d DG |
2255 | } |
2256 | exit(EXIT_FAILURE); | |
2257 | } else if (pid > 0) { | |
2258 | ret = pid; | |
8c0faa1d | 2259 | } else { |
76d7553f | 2260 | PERROR("start consumer fork"); |
8c0faa1d | 2261 | ret = -errno; |
8c0faa1d | 2262 | } |
8f4905da | 2263 | error: |
8c0faa1d DG |
2264 | return ret; |
2265 | } | |
2266 | ||
693bd40b | 2267 | /* |
3bd1e081 | 2268 | * Spawn the consumerd daemon and session daemon thread. |
693bd40b | 2269 | */ |
3bd1e081 | 2270 | static int start_consumerd(struct consumer_data *consumer_data) |
693bd40b | 2271 | { |
c617c0c6 | 2272 | int ret; |
edb8b045 DG |
2273 | |
2274 | /* | |
2275 | * Set the listen() state on the socket since there is a possible race | |
2276 | * between the exec() of the consumer daemon and this call if place in the | |
2277 | * consumer thread. See bug #366 for more details. | |
2278 | */ | |
2279 | ret = lttcomm_listen_unix_sock(consumer_data->err_sock); | |
2280 | if (ret < 0) { | |
2281 | goto error; | |
2282 | } | |
693bd40b | 2283 | |
3bd1e081 MD |
2284 | pthread_mutex_lock(&consumer_data->pid_mutex); |
2285 | if (consumer_data->pid != 0) { | |
2286 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 DG |
2287 | goto end; |
2288 | } | |
693bd40b | 2289 | |
3bd1e081 | 2290 | ret = spawn_consumerd(consumer_data); |
c49dc785 | 2291 | if (ret < 0) { |
3bd1e081 MD |
2292 | ERR("Spawning consumerd failed"); |
2293 | pthread_mutex_unlock(&consumer_data->pid_mutex); | |
c49dc785 | 2294 | goto error; |
693bd40b | 2295 | } |
c49dc785 | 2296 | |
3bd1e081 MD |
2297 | /* Setting up the consumer_data pid */ |
2298 | consumer_data->pid = ret; | |
48842b30 | 2299 | DBG2("Consumer pid %d", consumer_data->pid); |
3bd1e081 | 2300 | pthread_mutex_unlock(&consumer_data->pid_mutex); |
693bd40b | 2301 | |
3bd1e081 MD |
2302 | DBG2("Spawning consumer control thread"); |
2303 | ret = spawn_consumer_thread(consumer_data); | |
693bd40b | 2304 | if (ret < 0) { |
3bd1e081 | 2305 | ERR("Fatal error spawning consumer control thread"); |
693bd40b DG |
2306 | goto error; |
2307 | } | |
2308 | ||
c49dc785 | 2309 | end: |
693bd40b DG |
2310 | return 0; |
2311 | ||
2312 | error: | |
331744e3 | 2313 | /* Cleanup already created sockets on error. */ |
edb8b045 | 2314 | if (consumer_data->err_sock >= 0) { |
c617c0c6 MD |
2315 | int err; |
2316 | ||
edb8b045 DG |
2317 | err = close(consumer_data->err_sock); |
2318 | if (err < 0) { | |
2319 | PERROR("close consumer data error socket"); | |
2320 | } | |
2321 | } | |
693bd40b DG |
2322 | return ret; |
2323 | } | |
2324 | ||
b73401da | 2325 | /* |
096102bd | 2326 | * Setup necessary data for kernel tracer action. |
b73401da | 2327 | */ |
096102bd | 2328 | static int init_kernel_tracer(void) |
b73401da DG |
2329 | { |
2330 | int ret; | |
b73401da | 2331 | |
096102bd DG |
2332 | /* Modprobe lttng kernel modules */ |
2333 | ret = modprobe_lttng_control(); | |
b73401da | 2334 | if (ret < 0) { |
b73401da DG |
2335 | goto error; |
2336 | } | |
2337 | ||
096102bd DG |
2338 | /* Open debugfs lttng */ |
2339 | kernel_tracer_fd = open(module_proc_lttng, O_RDWR); | |
2340 | if (kernel_tracer_fd < 0) { | |
2341 | DBG("Failed to open %s", module_proc_lttng); | |
2f77fc4b DG |
2342 | ret = -1; |
2343 | goto error_open; | |
54d01ffb DG |
2344 | } |
2345 | ||
2f77fc4b DG |
2346 | /* Validate kernel version */ |
2347 | ret = kernel_validate_version(kernel_tracer_fd); | |
2348 | if (ret < 0) { | |
2349 | goto error_version; | |
b551a063 | 2350 | } |
54d01ffb | 2351 | |
2f77fc4b DG |
2352 | ret = modprobe_lttng_data(); |
2353 | if (ret < 0) { | |
2354 | goto error_modules; | |
54d01ffb DG |
2355 | } |
2356 | ||
2f77fc4b DG |
2357 | DBG("Kernel tracer fd %d", kernel_tracer_fd); |
2358 | return 0; | |
2359 | ||
2360 | error_version: | |
2361 | modprobe_remove_lttng_control(); | |
2362 | ret = close(kernel_tracer_fd); | |
2363 | if (ret) { | |
2364 | PERROR("close"); | |
b551a063 | 2365 | } |
2f77fc4b | 2366 | kernel_tracer_fd = -1; |
f73fabfd | 2367 | return LTTNG_ERR_KERN_VERSION; |
b551a063 | 2368 | |
2f77fc4b DG |
2369 | error_modules: |
2370 | ret = close(kernel_tracer_fd); | |
2371 | if (ret) { | |
2372 | PERROR("close"); | |
b551a063 | 2373 | } |
54d01ffb | 2374 | |
2f77fc4b DG |
2375 | error_open: |
2376 | modprobe_remove_lttng_control(); | |
54d01ffb DG |
2377 | |
2378 | error: | |
2f77fc4b DG |
2379 | WARN("No kernel tracer available"); |
2380 | kernel_tracer_fd = -1; | |
2381 | if (!is_root) { | |
f73fabfd | 2382 | return LTTNG_ERR_NEED_ROOT_SESSIOND; |
2f77fc4b | 2383 | } else { |
f73fabfd | 2384 | return LTTNG_ERR_KERN_NA; |
2f77fc4b | 2385 | } |
54d01ffb DG |
2386 | } |
2387 | ||
2f77fc4b | 2388 | |
54d01ffb | 2389 | /* |
2f77fc4b DG |
2390 | * Copy consumer output from the tracing session to the domain session. The |
2391 | * function also applies the right modification on a per domain basis for the | |
2392 | * trace files destination directory. | |
36b588ed MD |
2393 | * |
2394 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2395 | */ |
2f77fc4b | 2396 | static int copy_session_consumer(int domain, struct ltt_session *session) |
54d01ffb DG |
2397 | { |
2398 | int ret; | |
2f77fc4b DG |
2399 | const char *dir_name; |
2400 | struct consumer_output *consumer; | |
2401 | ||
2402 | assert(session); | |
2403 | assert(session->consumer); | |
54d01ffb | 2404 | |
b551a063 DG |
2405 | switch (domain) { |
2406 | case LTTNG_DOMAIN_KERNEL: | |
2f77fc4b | 2407 | DBG3("Copying tracing session consumer output in kernel session"); |
09a90bcd DG |
2408 | /* |
2409 | * XXX: We should audit the session creation and what this function | |
2410 | * does "extra" in order to avoid a destroy since this function is used | |
2411 | * in the domain session creation (kernel and ust) only. Same for UST | |
2412 | * domain. | |
2413 | */ | |
2414 | if (session->kernel_session->consumer) { | |
2415 | consumer_destroy_output(session->kernel_session->consumer); | |
2416 | } | |
2f77fc4b DG |
2417 | session->kernel_session->consumer = |
2418 | consumer_copy_output(session->consumer); | |
2419 | /* Ease our life a bit for the next part */ | |
2420 | consumer = session->kernel_session->consumer; | |
2421 | dir_name = DEFAULT_KERNEL_TRACE_DIR; | |
b551a063 | 2422 | break; |
f20baf8e | 2423 | case LTTNG_DOMAIN_JUL: |
b551a063 | 2424 | case LTTNG_DOMAIN_UST: |
2f77fc4b | 2425 | DBG3("Copying tracing session consumer output in UST session"); |
09a90bcd DG |
2426 | if (session->ust_session->consumer) { |
2427 | consumer_destroy_output(session->ust_session->consumer); | |
2428 | } | |
2f77fc4b DG |
2429 | session->ust_session->consumer = |
2430 | consumer_copy_output(session->consumer); | |
2431 | /* Ease our life a bit for the next part */ | |
2432 | consumer = session->ust_session->consumer; | |
2433 | dir_name = DEFAULT_UST_TRACE_DIR; | |
b551a063 DG |
2434 | break; |
2435 | default: | |
f73fabfd | 2436 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
54d01ffb DG |
2437 | goto error; |
2438 | } | |
2439 | ||
2f77fc4b | 2440 | /* Append correct directory to subdir */ |
c30ce0b3 CB |
2441 | strncat(consumer->subdir, dir_name, |
2442 | sizeof(consumer->subdir) - strlen(consumer->subdir) - 1); | |
2f77fc4b DG |
2443 | DBG3("Copy session consumer subdir %s", consumer->subdir); |
2444 | ||
f73fabfd | 2445 | ret = LTTNG_OK; |
54d01ffb DG |
2446 | |
2447 | error: | |
2448 | return ret; | |
2449 | } | |
2450 | ||
00e2e675 | 2451 | /* |
2f77fc4b | 2452 | * Create an UST session and add it to the session ust list. |
36b588ed MD |
2453 | * |
2454 | * Should *NOT* be called with RCU read-side lock held. | |
00e2e675 | 2455 | */ |
2f77fc4b DG |
2456 | static int create_ust_session(struct ltt_session *session, |
2457 | struct lttng_domain *domain) | |
00e2e675 DG |
2458 | { |
2459 | int ret; | |
2f77fc4b | 2460 | struct ltt_ust_session *lus = NULL; |
00e2e675 | 2461 | |
a4b92340 | 2462 | assert(session); |
2f77fc4b DG |
2463 | assert(domain); |
2464 | assert(session->consumer); | |
a4b92340 | 2465 | |
2f77fc4b | 2466 | switch (domain->type) { |
f20baf8e | 2467 | case LTTNG_DOMAIN_JUL: |
2f77fc4b DG |
2468 | case LTTNG_DOMAIN_UST: |
2469 | break; | |
2470 | default: | |
2471 | ERR("Unknown UST domain on create session %d", domain->type); | |
f73fabfd | 2472 | ret = LTTNG_ERR_UNKNOWN_DOMAIN; |
00e2e675 DG |
2473 | goto error; |
2474 | } | |
2475 | ||
2f77fc4b DG |
2476 | DBG("Creating UST session"); |
2477 | ||
dec56f6c | 2478 | lus = trace_ust_create_session(session->id); |
2f77fc4b | 2479 | if (lus == NULL) { |
f73fabfd | 2480 | ret = LTTNG_ERR_UST_SESS_FAIL; |
a4b92340 DG |
2481 | goto error; |
2482 | } | |
2483 | ||
2f77fc4b DG |
2484 | lus->uid = session->uid; |
2485 | lus->gid = session->gid; | |
2bba9e53 | 2486 | lus->output_traces = session->output_traces; |
27babd3a | 2487 | lus->snapshot_mode = session->snapshot_mode; |
ecc48a90 | 2488 | lus->live_timer_interval = session->live_timer; |
2f77fc4b | 2489 | session->ust_session = lus; |
00e2e675 | 2490 | |
2f77fc4b DG |
2491 | /* Copy session output to the newly created UST session */ |
2492 | ret = copy_session_consumer(domain->type, session); | |
f73fabfd | 2493 | if (ret != LTTNG_OK) { |
00e2e675 DG |
2494 | goto error; |
2495 | } | |
2496 | ||
f73fabfd | 2497 | return LTTNG_OK; |
00e2e675 DG |
2498 | |
2499 | error: | |
2f77fc4b DG |
2500 | free(lus); |
2501 | session->ust_session = NULL; | |
00e2e675 DG |
2502 | return ret; |
2503 | } | |
2504 | ||
2505 | /* | |
2f77fc4b | 2506 | * Create a kernel tracer session then create the default channel. |
00e2e675 | 2507 | */ |
2f77fc4b | 2508 | static int create_kernel_session(struct ltt_session *session) |
00e2e675 DG |
2509 | { |
2510 | int ret; | |
a4b92340 | 2511 | |
2f77fc4b | 2512 | DBG("Creating kernel session"); |
00e2e675 | 2513 | |
2f77fc4b DG |
2514 | ret = kernel_create_session(session, kernel_tracer_fd); |
2515 | if (ret < 0) { | |
f73fabfd | 2516 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
00e2e675 DG |
2517 | goto error; |
2518 | } | |
2519 | ||
2f77fc4b DG |
2520 | /* Code flow safety */ |
2521 | assert(session->kernel_session); | |
2522 | ||
2523 | /* Copy session output to the newly created Kernel session */ | |
2524 | ret = copy_session_consumer(LTTNG_DOMAIN_KERNEL, session); | |
f73fabfd | 2525 | if (ret != LTTNG_OK) { |
a4b92340 DG |
2526 | goto error; |
2527 | } | |
2528 | ||
2f77fc4b DG |
2529 | /* Create directory(ies) on local filesystem. */ |
2530 | if (session->kernel_session->consumer->type == CONSUMER_DST_LOCAL && | |
2531 | strlen(session->kernel_session->consumer->dst.trace_path) > 0) { | |
2532 | ret = run_as_mkdir_recursive( | |
2533 | session->kernel_session->consumer->dst.trace_path, | |
2534 | S_IRWXU | S_IRWXG, session->uid, session->gid); | |
2535 | if (ret < 0) { | |
2536 | if (ret != -EEXIST) { | |
2537 | ERR("Trace directory creation error"); | |
00e2e675 DG |
2538 | goto error; |
2539 | } | |
00e2e675 | 2540 | } |
2f77fc4b | 2541 | } |
00e2e675 | 2542 | |
2f77fc4b DG |
2543 | session->kernel_session->uid = session->uid; |
2544 | session->kernel_session->gid = session->gid; | |
2bba9e53 | 2545 | session->kernel_session->output_traces = session->output_traces; |
27babd3a | 2546 | session->kernel_session->snapshot_mode = session->snapshot_mode; |
00e2e675 | 2547 | |
f73fabfd | 2548 | return LTTNG_OK; |
00e2e675 | 2549 | |
2f77fc4b DG |
2550 | error: |
2551 | trace_kernel_destroy_session(session->kernel_session); | |
2552 | session->kernel_session = NULL; | |
2553 | return ret; | |
2554 | } | |
00e2e675 | 2555 | |
2f77fc4b DG |
2556 | /* |
2557 | * Count number of session permitted by uid/gid. | |
2558 | */ | |
2559 | static unsigned int lttng_sessions_count(uid_t uid, gid_t gid) | |
2560 | { | |
2561 | unsigned int i = 0; | |
2562 | struct ltt_session *session; | |
07424f16 | 2563 | |
2f77fc4b DG |
2564 | DBG("Counting number of available session for UID %d GID %d", |
2565 | uid, gid); | |
2566 | cds_list_for_each_entry(session, &session_list_ptr->head, list) { | |
00e2e675 | 2567 | /* |
2f77fc4b | 2568 | * Only list the sessions the user can control. |
00e2e675 | 2569 | */ |
2f77fc4b DG |
2570 | if (!session_access_ok(session, uid, gid)) { |
2571 | continue; | |
2572 | } | |
2573 | i++; | |
a4b92340 | 2574 | } |
2f77fc4b | 2575 | return i; |
00e2e675 DG |
2576 | } |
2577 | ||
54d01ffb DG |
2578 | /* |
2579 | * Process the command requested by the lttng client within the command | |
2580 | * context structure. This function make sure that the return structure (llm) | |
2581 | * is set and ready for transmission before returning. | |
2582 | * | |
2583 | * Return any error encountered or 0 for success. | |
53a80697 MD |
2584 | * |
2585 | * "sock" is only used for special-case var. len data. | |
36b588ed MD |
2586 | * |
2587 | * Should *NOT* be called with RCU read-side lock held. | |
54d01ffb | 2588 | */ |
53a80697 MD |
2589 | static int process_client_msg(struct command_ctx *cmd_ctx, int sock, |
2590 | int *sock_error) | |
54d01ffb | 2591 | { |
f73fabfd | 2592 | int ret = LTTNG_OK; |
44d3bd01 | 2593 | int need_tracing_session = 1; |
2e09ba09 | 2594 | int need_domain; |
54d01ffb DG |
2595 | |
2596 | DBG("Processing client command %d", cmd_ctx->lsm->cmd_type); | |
2597 | ||
53a80697 MD |
2598 | *sock_error = 0; |
2599 | ||
2e09ba09 MD |
2600 | switch (cmd_ctx->lsm->cmd_type) { |
2601 | case LTTNG_CREATE_SESSION: | |
27babd3a | 2602 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2603 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 MD |
2604 | case LTTNG_DESTROY_SESSION: |
2605 | case LTTNG_LIST_SESSIONS: | |
2606 | case LTTNG_LIST_DOMAINS: | |
2607 | case LTTNG_START_TRACE: | |
2608 | case LTTNG_STOP_TRACE: | |
6d805429 | 2609 | case LTTNG_DATA_PENDING: |
da3c9ec1 DG |
2610 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
2611 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
2612 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
2613 | case LTTNG_SNAPSHOT_RECORD: | |
2e09ba09 | 2614 | need_domain = 0; |
3aace903 | 2615 | break; |
2e09ba09 MD |
2616 | default: |
2617 | need_domain = 1; | |
2618 | } | |
2619 | ||
2620 | if (opt_no_kernel && need_domain | |
2621 | && cmd_ctx->lsm->domain.type == LTTNG_DOMAIN_KERNEL) { | |
531d29f9 | 2622 | if (!is_root) { |
f73fabfd | 2623 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
531d29f9 | 2624 | } else { |
f73fabfd | 2625 | ret = LTTNG_ERR_KERN_NA; |
531d29f9 | 2626 | } |
4fba7219 DG |
2627 | goto error; |
2628 | } | |
2629 | ||
8d3113b2 DG |
2630 | /* Deny register consumer if we already have a spawned consumer. */ |
2631 | if (cmd_ctx->lsm->cmd_type == LTTNG_REGISTER_CONSUMER) { | |
2632 | pthread_mutex_lock(&kconsumer_data.pid_mutex); | |
2633 | if (kconsumer_data.pid > 0) { | |
f73fabfd | 2634 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
fa317f24 | 2635 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
8d3113b2 DG |
2636 | goto error; |
2637 | } | |
2638 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
2639 | } | |
2640 | ||
54d01ffb DG |
2641 | /* |
2642 | * Check for command that don't needs to allocate a returned payload. We do | |
44d3bd01 | 2643 | * this here so we don't have to make the call for no payload at each |
54d01ffb DG |
2644 | * command. |
2645 | */ | |
2646 | switch(cmd_ctx->lsm->cmd_type) { | |
2647 | case LTTNG_LIST_SESSIONS: | |
2648 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2649 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
54d01ffb DG |
2650 | case LTTNG_LIST_DOMAINS: |
2651 | case LTTNG_LIST_CHANNELS: | |
2652 | case LTTNG_LIST_EVENTS: | |
2653 | break; | |
2654 | default: | |
2655 | /* Setup lttng message with no payload */ | |
2656 | ret = setup_lttng_msg(cmd_ctx, 0); | |
2657 | if (ret < 0) { | |
2658 | /* This label does not try to unlock the session */ | |
2659 | goto init_setup_error; | |
2660 | } | |
2661 | } | |
2662 | ||
2663 | /* Commands that DO NOT need a session. */ | |
2664 | switch (cmd_ctx->lsm->cmd_type) { | |
54d01ffb | 2665 | case LTTNG_CREATE_SESSION: |
27babd3a | 2666 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
ecc48a90 | 2667 | case LTTNG_CREATE_SESSION_LIVE: |
2e09ba09 | 2668 | case LTTNG_CALIBRATE: |
54d01ffb DG |
2669 | case LTTNG_LIST_SESSIONS: |
2670 | case LTTNG_LIST_TRACEPOINTS: | |
f37d259d | 2671 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
44d3bd01 | 2672 | need_tracing_session = 0; |
54d01ffb DG |
2673 | break; |
2674 | default: | |
2675 | DBG("Getting session %s by name", cmd_ctx->lsm->session.name); | |
256a5576 MD |
2676 | /* |
2677 | * We keep the session list lock across _all_ commands | |
2678 | * for now, because the per-session lock does not | |
2679 | * handle teardown properly. | |
2680 | */ | |
74babd95 | 2681 | session_lock_list(); |
54d01ffb DG |
2682 | cmd_ctx->session = session_find_by_name(cmd_ctx->lsm->session.name); |
2683 | if (cmd_ctx->session == NULL) { | |
bba2d65f | 2684 | ret = LTTNG_ERR_SESS_NOT_FOUND; |
54d01ffb DG |
2685 | goto error; |
2686 | } else { | |
2687 | /* Acquire lock for the session */ | |
2688 | session_lock(cmd_ctx->session); | |
2689 | } | |
2690 | break; | |
2691 | } | |
b389abbe | 2692 | |
2e09ba09 MD |
2693 | if (!need_domain) { |
2694 | goto skip_domain; | |
2695 | } | |
a4b92340 | 2696 | |
54d01ffb DG |
2697 | /* |
2698 | * Check domain type for specific "pre-action". | |
2699 | */ | |
2700 | switch (cmd_ctx->lsm->domain.type) { | |
2701 | case LTTNG_DOMAIN_KERNEL: | |
d1f1c568 | 2702 | if (!is_root) { |
f73fabfd | 2703 | ret = LTTNG_ERR_NEED_ROOT_SESSIOND; |
d1f1c568 DG |
2704 | goto error; |
2705 | } | |
2706 | ||
54d01ffb | 2707 | /* Kernel tracer check */ |
a4b35e07 | 2708 | if (kernel_tracer_fd == -1) { |
54d01ffb | 2709 | /* Basically, load kernel tracer modules */ |
096102bd DG |
2710 | ret = init_kernel_tracer(); |
2711 | if (ret != 0) { | |
54d01ffb DG |
2712 | goto error; |
2713 | } | |
2714 | } | |
5eb91c98 | 2715 | |
5c827ce0 DG |
2716 | /* Consumer is in an ERROR state. Report back to client */ |
2717 | if (uatomic_read(&kernel_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2718 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2719 | goto error; |
2720 | } | |
2721 | ||
54d01ffb | 2722 | /* Need a session for kernel command */ |
44d3bd01 | 2723 | if (need_tracing_session) { |
54d01ffb | 2724 | if (cmd_ctx->session->kernel_session == NULL) { |
6df2e2c9 | 2725 | ret = create_kernel_session(cmd_ctx->session); |
5eb91c98 | 2726 | if (ret < 0) { |
f73fabfd | 2727 | ret = LTTNG_ERR_KERN_SESS_FAIL; |
5eb91c98 DG |
2728 | goto error; |
2729 | } | |
b389abbe | 2730 | } |
7d29a247 | 2731 | |
54d01ffb | 2732 | /* Start the kernel consumer daemon */ |
3bd1e081 MD |
2733 | pthread_mutex_lock(&kconsumer_data.pid_mutex); |
2734 | if (kconsumer_data.pid == 0 && | |
785d2d0d | 2735 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
3bd1e081 MD |
2736 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); |
2737 | ret = start_consumerd(&kconsumer_data); | |
7d29a247 | 2738 | if (ret < 0) { |
f73fabfd | 2739 | ret = LTTNG_ERR_KERN_CONSUMER_FAIL; |
54d01ffb | 2740 | goto error; |
950131af | 2741 | } |
5c827ce0 | 2742 | uatomic_set(&kernel_consumerd_state, CONSUMER_STARTED); |
3ff2ecac MD |
2743 | } else { |
2744 | pthread_mutex_unlock(&kconsumer_data.pid_mutex); | |
33a2b854 | 2745 | } |
173af62f | 2746 | |
a4b92340 DG |
2747 | /* |
2748 | * The consumer was just spawned so we need to add the socket to | |
2749 | * the consumer output of the session if exist. | |
2750 | */ | |
2751 | ret = consumer_create_socket(&kconsumer_data, | |
2752 | cmd_ctx->session->kernel_session->consumer); | |
2753 | if (ret < 0) { | |
2754 | goto error; | |
173af62f | 2755 | } |
0d0c377a | 2756 | } |
5c827ce0 | 2757 | |
54d01ffb | 2758 | break; |
b9dfb167 | 2759 | case LTTNG_DOMAIN_JUL: |
2bdd86d4 | 2760 | case LTTNG_DOMAIN_UST: |
44d3bd01 | 2761 | { |
b51ec5b4 MD |
2762 | if (!ust_app_supported()) { |
2763 | ret = LTTNG_ERR_NO_UST; | |
2764 | goto error; | |
2765 | } | |
5c827ce0 DG |
2766 | /* Consumer is in an ERROR state. Report back to client */ |
2767 | if (uatomic_read(&ust_consumerd_state) == CONSUMER_ERROR) { | |
f73fabfd | 2768 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2769 | goto error; |
2770 | } | |
2771 | ||
44d3bd01 | 2772 | if (need_tracing_session) { |
a4b92340 | 2773 | /* Create UST session if none exist. */ |
f6a9efaa | 2774 | if (cmd_ctx->session->ust_session == NULL) { |
44d3bd01 | 2775 | ret = create_ust_session(cmd_ctx->session, |
6df2e2c9 | 2776 | &cmd_ctx->lsm->domain); |
f73fabfd | 2777 | if (ret != LTTNG_OK) { |
44d3bd01 DG |
2778 | goto error; |
2779 | } | |
2780 | } | |
00e2e675 | 2781 | |
7753dea8 MD |
2782 | /* Start the UST consumer daemons */ |
2783 | /* 64-bit */ | |
2784 | pthread_mutex_lock(&ustconsumer64_data.pid_mutex); | |
fc7a59ce | 2785 | if (consumerd64_bin[0] != '\0' && |
7753dea8 | 2786 | ustconsumer64_data.pid == 0 && |
785d2d0d | 2787 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2788 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2789 | ret = start_consumerd(&ustconsumer64_data); | |
2bdd86d4 | 2790 | if (ret < 0) { |
f73fabfd | 2791 | ret = LTTNG_ERR_UST_CONSUMER64_FAIL; |
173af62f | 2792 | uatomic_set(&ust_consumerd64_fd, -EINVAL); |
2bdd86d4 MD |
2793 | goto error; |
2794 | } | |
48842b30 | 2795 | |
173af62f | 2796 | uatomic_set(&ust_consumerd64_fd, ustconsumer64_data.cmd_sock); |
5c827ce0 | 2797 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
3ff2ecac | 2798 | } else { |
7753dea8 MD |
2799 | pthread_mutex_unlock(&ustconsumer64_data.pid_mutex); |
2800 | } | |
173af62f DG |
2801 | |
2802 | /* | |
2803 | * Setup socket for consumer 64 bit. No need for atomic access | |
2804 | * since it was set above and can ONLY be set in this thread. | |
2805 | */ | |
a4b92340 DG |
2806 | ret = consumer_create_socket(&ustconsumer64_data, |
2807 | cmd_ctx->session->ust_session->consumer); | |
2808 | if (ret < 0) { | |
2809 | goto error; | |
173af62f DG |
2810 | } |
2811 | ||
7753dea8 | 2812 | /* 32-bit */ |
fc7a59ce | 2813 | if (consumerd32_bin[0] != '\0' && |
7753dea8 | 2814 | ustconsumer32_data.pid == 0 && |
785d2d0d | 2815 | cmd_ctx->lsm->cmd_type != LTTNG_REGISTER_CONSUMER) { |
7753dea8 MD |
2816 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); |
2817 | ret = start_consumerd(&ustconsumer32_data); | |
2818 | if (ret < 0) { | |
f73fabfd | 2819 | ret = LTTNG_ERR_UST_CONSUMER32_FAIL; |
173af62f | 2820 | uatomic_set(&ust_consumerd32_fd, -EINVAL); |
7753dea8 MD |
2821 | goto error; |
2822 | } | |
5c827ce0 | 2823 | |
173af62f | 2824 | uatomic_set(&ust_consumerd32_fd, ustconsumer32_data.cmd_sock); |
5c827ce0 | 2825 | uatomic_set(&ust_consumerd_state, CONSUMER_STARTED); |
7753dea8 MD |
2826 | } else { |
2827 | pthread_mutex_unlock(&ustconsumer32_data.pid_mutex); | |
2bdd86d4 | 2828 | } |
173af62f DG |
2829 | |
2830 | /* | |
2831 | * Setup socket for consumer 64 bit. No need for atomic access | |
2832 | * since it was set above and can ONLY be set in this thread. | |
2833 | */ | |
a4b92340 DG |
2834 | ret = consumer_create_socket(&ustconsumer32_data, |
2835 | cmd_ctx->session->ust_session->consumer); | |
2836 | if (ret < 0) { | |
2837 | goto error; | |
173af62f | 2838 | } |
44d3bd01 DG |
2839 | } |
2840 | break; | |
48842b30 | 2841 | } |
54d01ffb | 2842 | default: |
54d01ffb DG |
2843 | break; |
2844 | } | |
2e09ba09 | 2845 | skip_domain: |
33a2b854 | 2846 | |
5c827ce0 DG |
2847 | /* Validate consumer daemon state when start/stop trace command */ |
2848 | if (cmd_ctx->lsm->cmd_type == LTTNG_START_TRACE || | |
2849 | cmd_ctx->lsm->cmd_type == LTTNG_STOP_TRACE) { | |
2850 | switch (cmd_ctx->lsm->domain.type) { | |
b9dfb167 | 2851 | case LTTNG_DOMAIN_JUL: |
5c827ce0 DG |
2852 | case LTTNG_DOMAIN_UST: |
2853 | if (uatomic_read(&ust_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2854 | ret = LTTNG_ERR_NO_USTCONSUMERD; |
5c827ce0 DG |
2855 | goto error; |
2856 | } | |
2857 | break; | |
2858 | case LTTNG_DOMAIN_KERNEL: | |
2859 | if (uatomic_read(&kernel_consumerd_state) != CONSUMER_STARTED) { | |
f73fabfd | 2860 | ret = LTTNG_ERR_NO_KERNCONSUMERD; |
5c827ce0 DG |
2861 | goto error; |
2862 | } | |
2863 | break; | |
2864 | } | |
2865 | } | |
2866 | ||
8e0af1b4 MD |
2867 | /* |
2868 | * Check that the UID or GID match that of the tracing session. | |
2869 | * The root user can interact with all sessions. | |
2870 | */ | |
2871 | if (need_tracing_session) { | |
2872 | if (!session_access_ok(cmd_ctx->session, | |
730389d9 DG |
2873 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
2874 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds))) { | |
f73fabfd | 2875 | ret = LTTNG_ERR_EPERM; |
8e0af1b4 MD |
2876 | goto error; |
2877 | } | |
2878 | } | |
2879 | ||
ffe60014 DG |
2880 | /* |
2881 | * Send relayd information to consumer as soon as we have a domain and a | |
2882 | * session defined. | |
2883 | */ | |
2884 | if (cmd_ctx->session && need_domain) { | |
2885 | /* | |
2886 | * Setup relayd if not done yet. If the relayd information was already | |
2887 | * sent to the consumer, this call will gracefully return. | |
2888 | */ | |
2889 | ret = cmd_setup_relayd(cmd_ctx->session); | |
2890 | if (ret != LTTNG_OK) { | |
2891 | goto error; | |
2892 | } | |
2893 | } | |
2894 | ||
54d01ffb DG |
2895 | /* Process by command type */ |
2896 | switch (cmd_ctx->lsm->cmd_type) { | |
2897 | case LTTNG_ADD_CONTEXT: | |
2898 | { | |
2899 | ret = cmd_add_context(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2900 | cmd_ctx->lsm->u.context.channel_name, | |
979e618e | 2901 | &cmd_ctx->lsm->u.context.ctx, kernel_poll_pipe[1]); |
54d01ffb DG |
2902 | break; |
2903 | } | |
2904 | case LTTNG_DISABLE_CHANNEL: | |
2905 | { | |
2906 | ret = cmd_disable_channel(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2907 | cmd_ctx->lsm->u.disable.channel_name); | |
2908 | break; | |
2909 | } | |
2910 | case LTTNG_DISABLE_EVENT: | |
2911 | { | |
2912 | ret = cmd_disable_event(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2913 | cmd_ctx->lsm->u.disable.channel_name, | |
2914 | cmd_ctx->lsm->u.disable.name); | |
33a2b854 DG |
2915 | break; |
2916 | } | |
54d01ffb DG |
2917 | case LTTNG_DISABLE_ALL_EVENT: |
2918 | { | |
2bdd86d4 | 2919 | DBG("Disabling all events"); |
54d01ffb DG |
2920 | |
2921 | ret = cmd_disable_event_all(cmd_ctx->session, cmd_ctx->lsm->domain.type, | |
2922 | cmd_ctx->lsm->u.disable.channel_name); | |
2923 | break; | |
2924 | } | |
2925 | case LTTNG_ENABLE_CHANNEL: | |
2926 | { | |
7972aab2 | 2927 | ret = cmd_enable_channel(cmd_ctx->session, &cmd_ctx->lsm->domain, |
2f77fc4b | 2928 | &cmd_ctx->lsm->u.channel.chan, kernel_poll_pipe[1]); |
54d01ffb DG |
2929 | break; |
2930 | } | |
2931 | case LTTNG_ENABLE_EVENT: | |
2932 | { | |
7972aab2 | 2933 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
54d01ffb | 2934 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2935 | &cmd_ctx->lsm->u.enable.event, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2936 | break; |
2937 | } | |
2938 | case LTTNG_ENABLE_ALL_EVENT: | |
2939 | { | |
2bdd86d4 | 2940 | DBG("Enabling all events"); |
54d01ffb | 2941 | |
7972aab2 | 2942 | ret = cmd_enable_event_all(cmd_ctx->session, &cmd_ctx->lsm->domain, |
8c9ae521 | 2943 | cmd_ctx->lsm->u.enable.channel_name, |
025faf73 | 2944 | cmd_ctx->lsm->u.enable.event.type, NULL, kernel_poll_pipe[1]); |
54d01ffb DG |
2945 | break; |
2946 | } | |
052da939 | 2947 | case LTTNG_LIST_TRACEPOINTS: |
2ef84c95 | 2948 | { |
9f19cc17 | 2949 | struct lttng_event *events; |
54d01ffb | 2950 | ssize_t nb_events; |
052da939 | 2951 | |
54d01ffb DG |
2952 | nb_events = cmd_list_tracepoints(cmd_ctx->lsm->domain.type, &events); |
2953 | if (nb_events < 0) { | |
f73fabfd | 2954 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
2955 | ret = -nb_events; |
2956 | goto error; | |
2ef84c95 DG |
2957 | } |
2958 | ||
2959 | /* | |
2960 | * Setup lttng message with payload size set to the event list size in | |
2961 | * bytes and then copy list into the llm payload. | |
2962 | */ | |
052da939 | 2963 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2964 | if (ret < 0) { |
052da939 | 2965 | free(events); |
2ef84c95 DG |
2966 | goto setup_error; |
2967 | } | |
2968 | ||
2969 | /* Copy event list into message payload */ | |
9f19cc17 | 2970 | memcpy(cmd_ctx->llm->payload, events, |
052da939 | 2971 | sizeof(struct lttng_event) * nb_events); |
2ef84c95 | 2972 | |
9f19cc17 | 2973 | free(events); |
2ef84c95 | 2974 | |
f73fabfd | 2975 | ret = LTTNG_OK; |
2ef84c95 DG |
2976 | break; |
2977 | } | |
f37d259d MD |
2978 | case LTTNG_LIST_TRACEPOINT_FIELDS: |
2979 | { | |
2980 | struct lttng_event_field *fields; | |
2981 | ssize_t nb_fields; | |
2982 | ||
a4b92340 DG |
2983 | nb_fields = cmd_list_tracepoint_fields(cmd_ctx->lsm->domain.type, |
2984 | &fields); | |
f37d259d | 2985 | if (nb_fields < 0) { |
f73fabfd | 2986 | /* Return value is a negative lttng_error_code. */ |
f37d259d MD |
2987 | ret = -nb_fields; |
2988 | goto error; | |
2989 | } | |
2990 | ||
2991 | /* | |
2992 | * Setup lttng message with payload size set to the event list size in | |
2993 | * bytes and then copy list into the llm payload. | |
2994 | */ | |
a4b92340 DG |
2995 | ret = setup_lttng_msg(cmd_ctx, |
2996 | sizeof(struct lttng_event_field) * nb_fields); | |
f37d259d MD |
2997 | if (ret < 0) { |
2998 | free(fields); | |
2999 | goto setup_error; | |
3000 | } | |
3001 | ||
3002 | /* Copy event list into message payload */ | |
3003 | memcpy(cmd_ctx->llm->payload, fields, | |
3004 | sizeof(struct lttng_event_field) * nb_fields); | |
3005 | ||
3006 | free(fields); | |
3007 | ||
f73fabfd | 3008 | ret = LTTNG_OK; |
f37d259d MD |
3009 | break; |
3010 | } | |
00e2e675 DG |
3011 | case LTTNG_SET_CONSUMER_URI: |
3012 | { | |
a4b92340 DG |
3013 | size_t nb_uri, len; |
3014 | struct lttng_uri *uris; | |
3015 | ||
3016 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3017 | len = nb_uri * sizeof(struct lttng_uri); | |
3018 | ||
3019 | if (nb_uri == 0) { | |
f73fabfd | 3020 | ret = LTTNG_ERR_INVALID; |
a4b92340 DG |
3021 | goto error; |
3022 | } | |
3023 | ||
3024 | uris = zmalloc(len); | |
3025 | if (uris == NULL) { | |
f73fabfd | 3026 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3027 | goto error; |
3028 | } | |
3029 | ||
3030 | /* Receive variable len data */ | |
77c7c900 | 3031 | DBG("Receiving %zu URI(s) from client ...", nb_uri); |
a4b92340 DG |
3032 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3033 | if (ret <= 0) { | |
3034 | DBG("No URIs received from client... continuing"); | |
3035 | *sock_error = 1; | |
f73fabfd | 3036 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3037 | free(uris); |
a4b92340 DG |
3038 | goto error; |
3039 | } | |
3040 | ||
00e2e675 | 3041 | ret = cmd_set_consumer_uri(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
a4b92340 | 3042 | nb_uri, uris); |
f73fabfd | 3043 | if (ret != LTTNG_OK) { |
b1d41407 | 3044 | free(uris); |
a4b92340 DG |
3045 | goto error; |
3046 | } | |
3047 | ||
3048 | /* | |
3049 | * XXX: 0 means that this URI should be applied on the session. Should | |
3050 | * be a DOMAIN enuam. | |
3051 | */ | |
3052 | if (cmd_ctx->lsm->domain.type == 0) { | |
3053 | /* Add the URI for the UST session if a consumer is present. */ | |
3054 | if (cmd_ctx->session->ust_session && | |
3055 | cmd_ctx->session->ust_session->consumer) { | |
3056 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_UST, cmd_ctx->session, | |
3057 | nb_uri, uris); | |
3058 | } else if (cmd_ctx->session->kernel_session && | |
3059 | cmd_ctx->session->kernel_session->consumer) { | |
3060 | ret = cmd_set_consumer_uri(LTTNG_DOMAIN_KERNEL, | |
3061 | cmd_ctx->session, nb_uri, uris); | |
3062 | } | |
3063 | } | |
3064 | ||
b1d41407 DG |
3065 | free(uris); |
3066 | ||
00e2e675 DG |
3067 | break; |
3068 | } | |
f3ed775e | 3069 | case LTTNG_START_TRACE: |
8c0faa1d | 3070 | { |
54d01ffb | 3071 | ret = cmd_start_trace(cmd_ctx->session); |
8c0faa1d DG |
3072 | break; |
3073 | } | |
f3ed775e | 3074 | case LTTNG_STOP_TRACE: |
8c0faa1d | 3075 | { |
54d01ffb | 3076 | ret = cmd_stop_trace(cmd_ctx->session); |
8c0faa1d DG |
3077 | break; |
3078 | } | |
5e16da05 MD |
3079 | case LTTNG_CREATE_SESSION: |
3080 | { | |
a4b92340 DG |
3081 | size_t nb_uri, len; |
3082 | struct lttng_uri *uris = NULL; | |
3083 | ||
3084 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3085 | len = nb_uri * sizeof(struct lttng_uri); | |
3086 | ||
3087 | if (nb_uri > 0) { | |
3088 | uris = zmalloc(len); | |
3089 | if (uris == NULL) { | |
f73fabfd | 3090 | ret = LTTNG_ERR_FATAL; |
a4b92340 DG |
3091 | goto error; |
3092 | } | |
3093 | ||
3094 | /* Receive variable len data */ | |
77c7c900 | 3095 | DBG("Waiting for %zu URIs from client ...", nb_uri); |
a4b92340 DG |
3096 | ret = lttcomm_recv_unix_sock(sock, uris, len); |
3097 | if (ret <= 0) { | |
3098 | DBG("No URIs received from client... continuing"); | |
3099 | *sock_error = 1; | |
f73fabfd | 3100 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3101 | free(uris); |
a4b92340 DG |
3102 | goto error; |
3103 | } | |
3104 | ||
3105 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3106 | DBG("Creating session with ONE network URI is a bad call"); | |
f73fabfd | 3107 | ret = LTTNG_ERR_SESSION_FAIL; |
b1d41407 | 3108 | free(uris); |
a4b92340 DG |
3109 | goto error; |
3110 | } | |
3111 | } | |
3112 | ||
3113 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, nb_uri, | |
ecc48a90 | 3114 | &cmd_ctx->creds, 0); |
a4b92340 | 3115 | |
b1d41407 DG |
3116 | free(uris); |
3117 | ||
00e2e675 DG |
3118 | break; |
3119 | } | |
5e16da05 MD |
3120 | case LTTNG_DESTROY_SESSION: |
3121 | { | |
2f77fc4b | 3122 | ret = cmd_destroy_session(cmd_ctx->session, kernel_poll_pipe[1]); |
a4b92340 DG |
3123 | |
3124 | /* Set session to NULL so we do not unlock it after free. */ | |
256a5576 | 3125 | cmd_ctx->session = NULL; |
5461b305 | 3126 | break; |
5e16da05 | 3127 | } |
9f19cc17 | 3128 | case LTTNG_LIST_DOMAINS: |
5e16da05 | 3129 | { |
54d01ffb DG |
3130 | ssize_t nb_dom; |
3131 | struct lttng_domain *domains; | |
5461b305 | 3132 | |
54d01ffb DG |
3133 | nb_dom = cmd_list_domains(cmd_ctx->session, &domains); |
3134 | if (nb_dom < 0) { | |
f73fabfd | 3135 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3136 | ret = -nb_dom; |
3137 | goto error; | |
ce3d728c | 3138 | } |
520ff687 | 3139 | |
54d01ffb | 3140 | ret = setup_lttng_msg(cmd_ctx, nb_dom * sizeof(struct lttng_domain)); |
5461b305 | 3141 | if (ret < 0) { |
ae9c20bc | 3142 | free(domains); |
5461b305 | 3143 | goto setup_error; |
520ff687 | 3144 | } |
57167058 | 3145 | |
54d01ffb DG |
3146 | /* Copy event list into message payload */ |
3147 | memcpy(cmd_ctx->llm->payload, domains, | |
3148 | nb_dom * sizeof(struct lttng_domain)); | |
3149 | ||
3150 | free(domains); | |
5e16da05 | 3151 | |
f73fabfd | 3152 | ret = LTTNG_OK; |
5e16da05 MD |
3153 | break; |
3154 | } | |
9f19cc17 | 3155 | case LTTNG_LIST_CHANNELS: |
5e16da05 | 3156 | { |
6775595e | 3157 | int nb_chan; |
54d01ffb DG |
3158 | struct lttng_channel *channels; |
3159 | ||
b551a063 DG |
3160 | nb_chan = cmd_list_channels(cmd_ctx->lsm->domain.type, |
3161 | cmd_ctx->session, &channels); | |
54d01ffb | 3162 | if (nb_chan < 0) { |
f73fabfd | 3163 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3164 | ret = -nb_chan; |
3165 | goto error; | |
5461b305 | 3166 | } |
ca95a216 | 3167 | |
54d01ffb | 3168 | ret = setup_lttng_msg(cmd_ctx, nb_chan * sizeof(struct lttng_channel)); |
5461b305 | 3169 | if (ret < 0) { |
ae9c20bc | 3170 | free(channels); |
5461b305 DG |
3171 | goto setup_error; |
3172 | } | |
9f19cc17 | 3173 | |
54d01ffb DG |
3174 | /* Copy event list into message payload */ |
3175 | memcpy(cmd_ctx->llm->payload, channels, | |
3176 | nb_chan * sizeof(struct lttng_channel)); | |
3177 | ||
3178 | free(channels); | |
9f19cc17 | 3179 | |
f73fabfd | 3180 | ret = LTTNG_OK; |
5461b305 | 3181 | break; |
5e16da05 | 3182 | } |
9f19cc17 | 3183 | case LTTNG_LIST_EVENTS: |
5e16da05 | 3184 | { |
b551a063 | 3185 | ssize_t nb_event; |
684d34d2 | 3186 | struct lttng_event *events = NULL; |
9f19cc17 | 3187 | |
b551a063 | 3188 | nb_event = cmd_list_events(cmd_ctx->lsm->domain.type, cmd_ctx->session, |
54d01ffb DG |
3189 | cmd_ctx->lsm->u.list.channel_name, &events); |
3190 | if (nb_event < 0) { | |
f73fabfd | 3191 | /* Return value is a negative lttng_error_code. */ |
54d01ffb DG |
3192 | ret = -nb_event; |
3193 | goto error; | |
5461b305 | 3194 | } |
ca95a216 | 3195 | |
54d01ffb | 3196 | ret = setup_lttng_msg(cmd_ctx, nb_event * sizeof(struct lttng_event)); |
5461b305 | 3197 | if (ret < 0) { |
ae9c20bc | 3198 | free(events); |
5461b305 DG |
3199 | goto setup_error; |
3200 | } | |
9f19cc17 | 3201 | |
54d01ffb DG |
3202 | /* Copy event list into message payload */ |
3203 | memcpy(cmd_ctx->llm->payload, events, | |
3204 | nb_event * sizeof(struct lttng_event)); | |
9f19cc17 | 3205 | |
54d01ffb | 3206 | free(events); |
9f19cc17 | 3207 | |
f73fabfd | 3208 | ret = LTTNG_OK; |
5461b305 | 3209 | break; |
5e16da05 MD |
3210 | } |
3211 | case LTTNG_LIST_SESSIONS: | |
3212 | { | |
8e0af1b4 | 3213 | unsigned int nr_sessions; |
5461b305 | 3214 | |
8e0af1b4 | 3215 | session_lock_list(); |
730389d9 DG |
3216 | nr_sessions = lttng_sessions_count( |
3217 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), | |
3218 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
d32fb093 | 3219 | |
8e0af1b4 | 3220 | ret = setup_lttng_msg(cmd_ctx, sizeof(struct lttng_session) * nr_sessions); |
5461b305 | 3221 | if (ret < 0) { |
54d01ffb | 3222 | session_unlock_list(); |
5461b305 | 3223 | goto setup_error; |
e065084a | 3224 | } |
5e16da05 | 3225 | |
6c9cc2ab | 3226 | /* Filled the session array */ |
2f77fc4b | 3227 | cmd_list_lttng_sessions((struct lttng_session *)(cmd_ctx->llm->payload), |
730389d9 DG |
3228 | LTTNG_SOCK_GET_UID_CRED(&cmd_ctx->creds), |
3229 | LTTNG_SOCK_GET_GID_CRED(&cmd_ctx->creds)); | |
6c9cc2ab | 3230 | |
54d01ffb | 3231 | session_unlock_list(); |
5e16da05 | 3232 | |
f73fabfd | 3233 | ret = LTTNG_OK; |
5e16da05 MD |
3234 | break; |
3235 | } | |
d0254c7c MD |
3236 | case LTTNG_CALIBRATE: |
3237 | { | |
54d01ffb DG |
3238 | ret = cmd_calibrate(cmd_ctx->lsm->domain.type, |
3239 | &cmd_ctx->lsm->u.calibrate); | |
d0254c7c MD |
3240 | break; |
3241 | } | |
d9800920 DG |
3242 | case LTTNG_REGISTER_CONSUMER: |
3243 | { | |
2f77fc4b DG |
3244 | struct consumer_data *cdata; |
3245 | ||
3246 | switch (cmd_ctx->lsm->domain.type) { | |
3247 | case LTTNG_DOMAIN_KERNEL: | |
3248 | cdata = &kconsumer_data; | |
3249 | break; | |
3250 | default: | |
f73fabfd | 3251 | ret = LTTNG_ERR_UND; |
2f77fc4b DG |
3252 | goto error; |
3253 | } | |
3254 | ||
54d01ffb | 3255 | ret = cmd_register_consumer(cmd_ctx->session, cmd_ctx->lsm->domain.type, |
2f77fc4b | 3256 | cmd_ctx->lsm->u.reg.path, cdata); |
d9800920 DG |
3257 | break; |
3258 | } | |
025faf73 | 3259 | case LTTNG_ENABLE_EVENT_WITH_FILTER: |
53a80697 MD |
3260 | { |
3261 | struct lttng_filter_bytecode *bytecode; | |
3262 | ||
025faf73 | 3263 | if (cmd_ctx->lsm->u.enable.bytecode_len > LTTNG_FILTER_MAX_LEN) { |
f73fabfd | 3264 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3265 | goto error; |
3266 | } | |
52df2401 MD |
3267 | if (cmd_ctx->lsm->u.enable.bytecode_len == 0) { |
3268 | ret = LTTNG_ERR_FILTER_INVAL; | |
3269 | goto error; | |
3270 | } | |
025faf73 | 3271 | bytecode = zmalloc(cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 | 3272 | if (!bytecode) { |
f73fabfd | 3273 | ret = LTTNG_ERR_FILTER_NOMEM; |
53a80697 MD |
3274 | goto error; |
3275 | } | |
3276 | /* Receive var. len. data */ | |
3277 | DBG("Receiving var len data from client ..."); | |
3278 | ret = lttcomm_recv_unix_sock(sock, bytecode, | |
025faf73 | 3279 | cmd_ctx->lsm->u.enable.bytecode_len); |
53a80697 MD |
3280 | if (ret <= 0) { |
3281 | DBG("Nothing recv() from client var len data... continuing"); | |
3282 | *sock_error = 1; | |
f73fabfd | 3283 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3284 | goto error; |
3285 | } | |
3286 | ||
3287 | if (bytecode->len + sizeof(*bytecode) | |
025faf73 | 3288 | != cmd_ctx->lsm->u.enable.bytecode_len) { |
53a80697 | 3289 | free(bytecode); |
f73fabfd | 3290 | ret = LTTNG_ERR_FILTER_INVAL; |
53a80697 MD |
3291 | goto error; |
3292 | } | |
3293 | ||
7972aab2 | 3294 | ret = cmd_enable_event(cmd_ctx->session, &cmd_ctx->lsm->domain, |
025faf73 DG |
3295 | cmd_ctx->lsm->u.enable.channel_name, |
3296 | &cmd_ctx->lsm->u.enable.event, bytecode, kernel_poll_pipe[1]); | |
53a80697 MD |
3297 | break; |
3298 | } | |
6d805429 | 3299 | case LTTNG_DATA_PENDING: |
806e2684 | 3300 | { |
6d805429 | 3301 | ret = cmd_data_pending(cmd_ctx->session); |
806e2684 DG |
3302 | break; |
3303 | } | |
da3c9ec1 DG |
3304 | case LTTNG_SNAPSHOT_ADD_OUTPUT: |
3305 | { | |
6dc3064a DG |
3306 | struct lttcomm_lttng_output_id reply; |
3307 | ||
3308 | ret = cmd_snapshot_add_output(cmd_ctx->session, | |
3309 | &cmd_ctx->lsm->u.snapshot_output.output, &reply.id); | |
3310 | if (ret != LTTNG_OK) { | |
3311 | goto error; | |
3312 | } | |
3313 | ||
3314 | ret = setup_lttng_msg(cmd_ctx, sizeof(reply)); | |
3315 | if (ret < 0) { | |
3316 | goto setup_error; | |
3317 | } | |
3318 | ||
3319 | /* Copy output list into message payload */ | |
3320 | memcpy(cmd_ctx->llm->payload, &reply, sizeof(reply)); | |
3321 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3322 | break; |
3323 | } | |
3324 | case LTTNG_SNAPSHOT_DEL_OUTPUT: | |
3325 | { | |
6dc3064a DG |
3326 | ret = cmd_snapshot_del_output(cmd_ctx->session, |
3327 | &cmd_ctx->lsm->u.snapshot_output.output); | |
da3c9ec1 DG |
3328 | break; |
3329 | } | |
3330 | case LTTNG_SNAPSHOT_LIST_OUTPUT: | |
3331 | { | |
6dc3064a DG |
3332 | ssize_t nb_output; |
3333 | struct lttng_snapshot_output *outputs = NULL; | |
3334 | ||
3335 | nb_output = cmd_snapshot_list_outputs(cmd_ctx->session, &outputs); | |
3336 | if (nb_output < 0) { | |
3337 | ret = -nb_output; | |
3338 | goto error; | |
3339 | } | |
3340 | ||
3341 | ret = setup_lttng_msg(cmd_ctx, | |
3342 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3343 | if (ret < 0) { | |
3344 | free(outputs); | |
3345 | goto setup_error; | |
3346 | } | |
3347 | ||
3348 | if (outputs) { | |
3349 | /* Copy output list into message payload */ | |
3350 | memcpy(cmd_ctx->llm->payload, outputs, | |
3351 | nb_output * sizeof(struct lttng_snapshot_output)); | |
3352 | free(outputs); | |
3353 | } | |
3354 | ||
3355 | ret = LTTNG_OK; | |
da3c9ec1 DG |
3356 | break; |
3357 | } | |
3358 | case LTTNG_SNAPSHOT_RECORD: | |
3359 | { | |
6dc3064a DG |
3360 | ret = cmd_snapshot_record(cmd_ctx->session, |
3361 | &cmd_ctx->lsm->u.snapshot_record.output, | |
3362 | cmd_ctx->lsm->u.snapshot_record.wait); | |
da3c9ec1 DG |
3363 | break; |
3364 | } | |
27babd3a DG |
3365 | case LTTNG_CREATE_SESSION_SNAPSHOT: |
3366 | { | |
3367 | size_t nb_uri, len; | |
3368 | struct lttng_uri *uris = NULL; | |
3369 | ||
3370 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3371 | len = nb_uri * sizeof(struct lttng_uri); | |
3372 | ||
3373 | if (nb_uri > 0) { | |
3374 | uris = zmalloc(len); | |
3375 | if (uris == NULL) { | |
3376 | ret = LTTNG_ERR_FATAL; | |
3377 | goto error; | |
3378 | } | |
3379 | ||
3380 | /* Receive variable len data */ | |
3381 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3382 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3383 | if (ret <= 0) { | |
3384 | DBG("No URIs received from client... continuing"); | |
3385 | *sock_error = 1; | |
3386 | ret = LTTNG_ERR_SESSION_FAIL; | |
3387 | free(uris); | |
3388 | goto error; | |
3389 | } | |
3390 | ||
3391 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3392 | DBG("Creating session with ONE network URI is a bad call"); | |
3393 | ret = LTTNG_ERR_SESSION_FAIL; | |
3394 | free(uris); | |
3395 | goto error; | |
3396 | } | |
3397 | } | |
3398 | ||
3399 | ret = cmd_create_session_snapshot(cmd_ctx->lsm->session.name, uris, | |
3400 | nb_uri, &cmd_ctx->creds); | |
3401 | free(uris); | |
3402 | break; | |
3403 | } | |
ecc48a90 JD |
3404 | case LTTNG_CREATE_SESSION_LIVE: |
3405 | { | |
3406 | size_t nb_uri, len; | |
3407 | struct lttng_uri *uris = NULL; | |
3408 | ||
3409 | nb_uri = cmd_ctx->lsm->u.uri.size; | |
3410 | len = nb_uri * sizeof(struct lttng_uri); | |
3411 | ||
3412 | if (nb_uri > 0) { | |
3413 | uris = zmalloc(len); | |
3414 | if (uris == NULL) { | |
3415 | ret = LTTNG_ERR_FATAL; | |
3416 | goto error; | |
3417 | } | |
3418 | ||
3419 | /* Receive variable len data */ | |
3420 | DBG("Waiting for %zu URIs from client ...", nb_uri); | |
3421 | ret = lttcomm_recv_unix_sock(sock, uris, len); | |
3422 | if (ret <= 0) { | |
3423 | DBG("No URIs received from client... continuing"); | |
3424 | *sock_error = 1; | |
3425 | ret = LTTNG_ERR_SESSION_FAIL; | |
3426 | free(uris); | |
3427 | goto error; | |
3428 | } | |
3429 | ||
3430 | if (nb_uri == 1 && uris[0].dtype != LTTNG_DST_PATH) { | |
3431 | DBG("Creating session with ONE network URI is a bad call"); | |
3432 | ret = LTTNG_ERR_SESSION_FAIL; | |
3433 | free(uris); | |
3434 | goto error; | |
3435 | } | |
3436 | } | |
3437 | ||
3438 | ret = cmd_create_session_uri(cmd_ctx->lsm->session.name, uris, | |
3439 | nb_uri, &cmd_ctx->creds, cmd_ctx->lsm->u.session_live.timer_interval); | |
3440 | free(uris); | |
3441 | break; | |
3442 | } | |
5e16da05 | 3443 | default: |
f73fabfd | 3444 | ret = LTTNG_ERR_UND; |
5461b305 | 3445 | break; |
fac6795d DG |
3446 | } |
3447 | ||
5461b305 | 3448 | error: |
5461b305 DG |
3449 | if (cmd_ctx->llm == NULL) { |
3450 | DBG("Missing llm structure. Allocating one."); | |
894be886 | 3451 | if (setup_lttng_msg(cmd_ctx, 0) < 0) { |
5461b305 DG |
3452 | goto setup_error; |
3453 | } | |
3454 | } | |
54d01ffb | 3455 | /* Set return code */ |
5461b305 | 3456 | cmd_ctx->llm->ret_code = ret; |
5461b305 | 3457 | setup_error: |
b5541356 | 3458 | if (cmd_ctx->session) { |
54d01ffb | 3459 | session_unlock(cmd_ctx->session); |
b5541356 | 3460 | } |
256a5576 MD |
3461 | if (need_tracing_session) { |
3462 | session_unlock_list(); | |
3463 | } | |
54d01ffb | 3464 | init_setup_error: |
8028d920 | 3465 | return ret; |
fac6795d DG |
3466 | } |
3467 | ||
44a5e5eb DG |
3468 | /* |
3469 | * Thread managing health check socket. | |
3470 | */ | |
3471 | static void *thread_manage_health(void *data) | |
3472 | { | |
eb4a2943 | 3473 | int sock = -1, new_sock = -1, ret, i, pollfd, err = -1; |
44a5e5eb DG |
3474 | uint32_t revents, nb_fd; |
3475 | struct lttng_poll_event events; | |
0c89d795 MD |
3476 | struct health_comm_msg msg; |
3477 | struct health_comm_reply reply; | |
44a5e5eb DG |
3478 | |
3479 | DBG("[thread] Manage health check started"); | |
3480 | ||
3481 | rcu_register_thread(); | |
3482 | ||
6d737ce4 DG |
3483 | /* We might hit an error path before this is created. */ |
3484 | lttng_poll_init(&events); | |
3cc04881 | 3485 | |
44a5e5eb DG |
3486 | /* Create unix socket */ |
3487 | sock = lttcomm_create_unix_sock(health_unix_sock_path); | |
3488 | if (sock < 0) { | |
3489 | ERR("Unable to create health check Unix socket"); | |
3490 | ret = -1; | |
3491 | goto error; | |
3492 | } | |
3493 | ||
6c71277b MD |
3494 | if (is_root) { |
3495 | /* lttng health client socket path permissions */ | |
3496 | ret = chown(health_unix_sock_path, 0, | |
3497 | utils_get_group_id(tracing_group_name)); | |
3498 | if (ret < 0) { | |
3499 | ERR("Unable to set group on %s", health_unix_sock_path); | |
3500 | PERROR("chown"); | |
3501 | ret = -1; | |
3502 | goto error; | |
3503 | } | |
3504 | ||
3505 | ret = chmod(health_unix_sock_path, | |
3506 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
3507 | if (ret < 0) { | |
3508 | ERR("Unable to set permissions on %s", health_unix_sock_path); | |
3509 | PERROR("chmod"); | |
3510 | ret = -1; | |
3511 | goto error; | |
3512 | } | |
3513 | } | |
3514 | ||
b662582b DG |
3515 | /* |
3516 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3517 | * show must go on. | |
3518 | */ | |
3519 | (void) utils_set_fd_cloexec(sock); | |
3520 | ||
44a5e5eb DG |
3521 | ret = lttcomm_listen_unix_sock(sock); |
3522 | if (ret < 0) { | |
3523 | goto error; | |
3524 | } | |
3525 | ||
3526 | /* | |
3527 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3528 | * more will be added to this poll set. | |
3529 | */ | |
d0b96690 | 3530 | ret = sessiond_set_thread_pollset(&events, 2); |
44a5e5eb DG |
3531 | if (ret < 0) { |
3532 | goto error; | |
3533 | } | |
3534 | ||
3535 | /* Add the application registration socket */ | |
3536 | ret = lttng_poll_add(&events, sock, LPOLLIN | LPOLLPRI); | |
3537 | if (ret < 0) { | |
3538 | goto error; | |
3539 | } | |
3540 | ||
3541 | while (1) { | |
3542 | DBG("Health check ready"); | |
3543 | ||
44a5e5eb DG |
3544 | /* Inifinite blocking call, waiting for transmission */ |
3545 | restart: | |
3546 | ret = lttng_poll_wait(&events, -1); | |
3547 | if (ret < 0) { | |
3548 | /* | |
3549 | * Restart interrupted system call. | |
3550 | */ | |
3551 | if (errno == EINTR) { | |
3552 | goto restart; | |
3553 | } | |
3554 | goto error; | |
3555 | } | |
3556 | ||
0d9c5d77 DG |
3557 | nb_fd = ret; |
3558 | ||
44a5e5eb DG |
3559 | for (i = 0; i < nb_fd; i++) { |
3560 | /* Fetch once the poll data */ | |
3561 | revents = LTTNG_POLL_GETEV(&events, i); | |
3562 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3563 | ||
3564 | /* Thread quit pipe has been closed. Killing thread. */ | |
d0b96690 | 3565 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
44a5e5eb | 3566 | if (ret) { |
139ac872 MD |
3567 | err = 0; |
3568 | goto exit; | |
44a5e5eb DG |
3569 | } |
3570 | ||
3571 | /* Event on the registration socket */ | |
3572 | if (pollfd == sock) { | |
3573 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3574 | ERR("Health socket poll error"); | |
3575 | goto error; | |
3576 | } | |
3577 | } | |
3578 | } | |
3579 | ||
3580 | new_sock = lttcomm_accept_unix_sock(sock); | |
3581 | if (new_sock < 0) { | |
3582 | goto error; | |
3583 | } | |
3584 | ||
b662582b DG |
3585 | /* |
3586 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3587 | * show must go on. | |
3588 | */ | |
3589 | (void) utils_set_fd_cloexec(new_sock); | |
3590 | ||
44a5e5eb DG |
3591 | DBG("Receiving data from client for health..."); |
3592 | ret = lttcomm_recv_unix_sock(new_sock, (void *)&msg, sizeof(msg)); | |
3593 | if (ret <= 0) { | |
3594 | DBG("Nothing recv() from client... continuing"); | |
3595 | ret = close(new_sock); | |
3596 | if (ret) { | |
3597 | PERROR("close"); | |
3598 | } | |
3599 | new_sock = -1; | |
3600 | continue; | |
3601 | } | |
3602 | ||
3603 | rcu_thread_online(); | |
3604 | ||
6c71277b MD |
3605 | reply.ret_code = 0; |
3606 | for (i = 0; i < NR_HEALTH_SESSIOND_TYPES; i++) { | |
3607 | /* | |
3608 | * health_check_state returns 0 if health is | |
3609 | * bad. | |
3610 | */ | |
3611 | if (!health_check_state(health_sessiond, i)) { | |
3612 | reply.ret_code |= 1ULL << i; | |
3613 | } | |
44a5e5eb DG |
3614 | } |
3615 | ||
6c71277b | 3616 | DBG2("Health check return value %" PRIx64, reply.ret_code); |
44a5e5eb DG |
3617 | |
3618 | ret = send_unix_sock(new_sock, (void *) &reply, sizeof(reply)); | |
3619 | if (ret < 0) { | |
3620 | ERR("Failed to send health data back to client"); | |
3621 | } | |
3622 | ||
3623 | /* End of transmission */ | |
3624 | ret = close(new_sock); | |
3625 | if (ret) { | |
3626 | PERROR("close"); | |
3627 | } | |
3628 | new_sock = -1; | |
3629 | } | |
3630 | ||
139ac872 | 3631 | exit: |
44a5e5eb | 3632 | error: |
139ac872 MD |
3633 | if (err) { |
3634 | ERR("Health error occurred in %s", __func__); | |
3635 | } | |
44a5e5eb DG |
3636 | DBG("Health check thread dying"); |
3637 | unlink(health_unix_sock_path); | |
3638 | if (sock >= 0) { | |
3639 | ret = close(sock); | |
3640 | if (ret) { | |
3641 | PERROR("close"); | |
3642 | } | |
3643 | } | |
44a5e5eb DG |
3644 | |
3645 | lttng_poll_clean(&events); | |
3646 | ||
3647 | rcu_unregister_thread(); | |
3648 | return NULL; | |
3649 | } | |
3650 | ||
1d4b027a | 3651 | /* |
d063d709 DG |
3652 | * This thread manage all clients request using the unix client socket for |
3653 | * communication. | |
1d4b027a DG |
3654 | */ |
3655 | static void *thread_manage_clients(void *data) | |
3656 | { | |
139ac872 | 3657 | int sock = -1, ret, i, pollfd, err = -1; |
53a80697 | 3658 | int sock_error; |
5eb91c98 | 3659 | uint32_t revents, nb_fd; |
273ea72c | 3660 | struct command_ctx *cmd_ctx = NULL; |
5eb91c98 | 3661 | struct lttng_poll_event events; |
1d4b027a DG |
3662 | |
3663 | DBG("[thread] Manage client started"); | |
3664 | ||
f6a9efaa DG |
3665 | rcu_register_thread(); |
3666 | ||
6c71277b | 3667 | health_register(health_sessiond, HEALTH_SESSIOND_TYPE_CMD); |
927ca06a | 3668 | |
6993eeb3 CB |
3669 | if (testpoint(thread_manage_clients)) { |
3670 | goto error_testpoint; | |
3671 | } | |
3672 | ||
840cb59c | 3673 | health_code_update(); |
44a5e5eb | 3674 | |
1d4b027a DG |
3675 | ret = lttcomm_listen_unix_sock(client_sock); |
3676 | if (ret < 0) { | |
35df2755 | 3677 | goto error_listen; |
1d4b027a DG |
3678 | } |
3679 | ||
5eb91c98 DG |
3680 | /* |
3681 | * Pass 2 as size here for the thread quit pipe and client_sock. Nothing | |
3682 | * more will be added to this poll set. | |
3683 | */ | |
d0b96690 | 3684 | ret = sessiond_set_thread_pollset(&events, 2); |
5eb91c98 | 3685 | if (ret < 0) { |
35df2755 | 3686 | goto error_create_poll; |
5eb91c98 | 3687 | } |
273ea72c | 3688 | |
5eb91c98 DG |
3689 | /* Add the application registration socket */ |
3690 | ret = lttng_poll_add(&events, client_sock, LPOLLIN | LPOLLPRI); | |
3691 | if (ret < 0) { | |
3692 | goto error; | |
3693 | } | |
273ea72c | 3694 | |
bbd973c2 DG |
3695 | /* |
3696 | * Notify parent pid that we are ready to accept command for client side. | |
1d4b027a DG |
3697 | */ |
3698 | if (opt_sig_parent) { | |
8db8d1dc | 3699 | kill(ppid, SIGUSR1); |
1d4b027a DG |
3700 | } |
3701 | ||
6993eeb3 CB |
3702 | if (testpoint(thread_manage_clients_before_loop)) { |
3703 | goto error; | |
3704 | } | |
8ac94142 | 3705 | |
840cb59c | 3706 | health_code_update(); |
44a5e5eb | 3707 | |
1d4b027a | 3708 | while (1) { |
1d4b027a | 3709 | DBG("Accepting client command ..."); |
273ea72c DG |
3710 | |
3711 | /* Inifinite blocking call, waiting for transmission */ | |
88f2b785 | 3712 | restart: |
a78af745 | 3713 | health_poll_entry(); |
5eb91c98 | 3714 | ret = lttng_poll_wait(&events, -1); |
a78af745 | 3715 | health_poll_exit(); |
273ea72c | 3716 | if (ret < 0) { |
88f2b785 MD |
3717 | /* |
3718 | * Restart interrupted system call. | |
3719 | */ | |
3720 | if (errno == EINTR) { | |
3721 | goto restart; | |
3722 | } | |
273ea72c DG |
3723 | goto error; |
3724 | } | |
3725 | ||
0d9c5d77 DG |
3726 | nb_fd = ret; |
3727 | ||
5eb91c98 DG |
3728 | for (i = 0; i < nb_fd; i++) { |
3729 | /* Fetch once the poll data */ | |
3730 | revents = LTTNG_POLL_GETEV(&events, i); | |
3731 | pollfd = LTTNG_POLL_GETFD(&events, i); | |
3732 | ||
840cb59c | 3733 | health_code_update(); |
44a5e5eb | 3734 | |
5eb91c98 | 3735 | /* Thread quit pipe has been closed. Killing thread. */ |
d0b96690 | 3736 | ret = sessiond_check_thread_quit_pipe(pollfd, revents); |
5eb91c98 | 3737 | if (ret) { |
139ac872 MD |
3738 | err = 0; |
3739 | goto exit; | |
5eb91c98 DG |
3740 | } |
3741 | ||
3742 | /* Event on the registration socket */ | |
3743 | if (pollfd == client_sock) { | |
3744 | if (revents & (LPOLLERR | LPOLLHUP | LPOLLRDHUP)) { | |
3745 | ERR("Client socket poll error"); | |
3746 | goto error; | |
3747 | } | |
3748 | } | |
3749 | } | |
3750 | ||
3751 | DBG("Wait for client response"); | |
3752 | ||
840cb59c | 3753 | health_code_update(); |
44a5e5eb | 3754 | |
5eb91c98 DG |
3755 | sock = lttcomm_accept_unix_sock(client_sock); |
3756 | if (sock < 0) { | |
273ea72c | 3757 | goto error; |
273ea72c DG |
3758 | } |
3759 | ||
b662582b DG |
3760 | /* |
3761 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
3762 | * show must go on. | |
3763 | */ | |
3764 | (void) utils_set_fd_cloexec(sock); | |
3765 | ||
be040666 DG |
3766 | /* Set socket option for credentials retrieval */ |
3767 | ret = lttcomm_setsockopt_creds_unix_sock(sock); | |
3768 | if (ret < 0) { | |
3769 | goto error; | |
3770 | } | |
3771 | ||
5eb91c98 | 3772 | /* Allocate context command to process the client request */ |
ba7f0ae5 | 3773 | cmd_ctx = zmalloc(sizeof(struct command_ctx)); |
5eb91c98 | 3774 | if (cmd_ctx == NULL) { |
76d7553f | 3775 | PERROR("zmalloc cmd_ctx"); |
1d4b027a | 3776 | goto error; |
5eb91c98 | 3777 | } |
1d4b027a | 3778 | |
5eb91c98 | 3779 | /* Allocate data buffer for reception */ |
ba7f0ae5 | 3780 | cmd_ctx->lsm = zmalloc(sizeof(struct lttcomm_session_msg)); |
5eb91c98 | 3781 | if (cmd_ctx->lsm == NULL) { |
76d7553f | 3782 | PERROR("zmalloc cmd_ctx->lsm"); |
5eb91c98 DG |
3783 | goto error; |
3784 | } | |
1d4b027a | 3785 | |
5eb91c98 DG |
3786 | cmd_ctx->llm = NULL; |
3787 | cmd_ctx->session = NULL; | |
1d4b027a | 3788 | |
840cb59c | 3789 | health_code_update(); |
44a5e5eb | 3790 | |
5eb91c98 DG |
3791 | /* |
3792 | * Data is received from the lttng client. The struct | |
3793 | * lttcomm_session_msg (lsm) contains the command and data request of | |
3794 | * the client. | |
3795 | */ | |
3796 | DBG("Receiving data from client ..."); | |
be040666 DG |
3797 | ret = lttcomm_recv_creds_unix_sock(sock, cmd_ctx->lsm, |
3798 | sizeof(struct lttcomm_session_msg), &cmd_ctx->creds); | |
5eb91c98 DG |
3799 | if (ret <= 0) { |
3800 | DBG("Nothing recv() from client... continuing"); | |
76d7553f MD |
3801 | ret = close(sock); |
3802 | if (ret) { | |
3803 | PERROR("close"); | |
3804 | } | |
3805 | sock = -1; | |
a2c0da86 | 3806 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3807 | continue; |
3808 | } | |
1d4b027a | 3809 | |
840cb59c | 3810 | health_code_update(); |
44a5e5eb | 3811 | |
5eb91c98 DG |
3812 | // TODO: Validate cmd_ctx including sanity check for |
3813 | // security purpose. | |
f7776ea7 | 3814 | |
f6a9efaa | 3815 | rcu_thread_online(); |
5eb91c98 DG |
3816 | /* |
3817 | * This function dispatch the work to the kernel or userspace tracer | |
3818 | * libs and fill the lttcomm_lttng_msg data structure of all the needed | |
3819 | * informations for the client. The command context struct contains | |
3820 | * everything this function may needs. | |
3821 | */ | |
53a80697 | 3822 | ret = process_client_msg(cmd_ctx, sock, &sock_error); |
f6a9efaa | 3823 | rcu_thread_offline(); |
5eb91c98 | 3824 | if (ret < 0) { |
36134aa1 DG |
3825 | ret = close(sock); |
3826 | if (ret) { | |
3827 | PERROR("close"); | |
53a80697 | 3828 | } |
36134aa1 | 3829 | sock = -1; |
bbd973c2 | 3830 | /* |
5eb91c98 | 3831 | * TODO: Inform client somehow of the fatal error. At |
ba7f0ae5 | 3832 | * this point, ret < 0 means that a zmalloc failed |
53a80697 MD |
3833 | * (ENOMEM). Error detected but still accept |
3834 | * command, unless a socket error has been | |
3835 | * detected. | |
bbd973c2 | 3836 | */ |
bbd973c2 | 3837 | clean_command_ctx(&cmd_ctx); |
5eb91c98 DG |
3838 | continue; |
3839 | } | |
d6e4fca4 | 3840 | |
840cb59c | 3841 | health_code_update(); |
44a5e5eb | 3842 | |
54d01ffb DG |
3843 | DBG("Sending response (size: %d, retcode: %s)", |
3844 | cmd_ctx->lttng_msg_size, | |
9a745bc7 | 3845 | lttng_strerror(-cmd_ctx->llm->ret_code)); |
54d01ffb | 3846 | ret = send_unix_sock(sock, cmd_ctx->llm, cmd_ctx->lttng_msg_size); |
5eb91c98 DG |
3847 | if (ret < 0) { |
3848 | ERR("Failed to send data back to client"); | |
bbd973c2 | 3849 | } |
1d4b027a | 3850 | |
5eb91c98 | 3851 | /* End of transmission */ |
76d7553f MD |
3852 | ret = close(sock); |
3853 | if (ret) { | |
3854 | PERROR("close"); | |
3855 | } | |
3856 | sock = -1; | |
be040666 DG |
3857 | |
3858 | clean_command_ctx(&cmd_ctx); | |
44a5e5eb | 3859 | |
840cb59c | 3860 | health_code_update(); |
273ea72c DG |
3861 | } |
3862 | ||
139ac872 | 3863 | exit: |
5eb91c98 | 3864 | error: |
35df2755 CB |
3865 | if (sock >= 0) { |
3866 | ret = close(sock); | |
3867 | if (ret) { | |
3868 | PERROR("close"); | |
3869 | } | |
139ac872 | 3870 | } |
44a5e5eb | 3871 | |
35df2755 CB |
3872 | lttng_poll_clean(&events); |
3873 | clean_command_ctx(&cmd_ctx); | |
3874 | ||
3875 | error_listen: | |
3876 | error_create_poll: | |
6993eeb3 | 3877 | error_testpoint: |
273ea72c | 3878 | unlink(client_unix_sock_path); |
76d7553f MD |
3879 | if (client_sock >= 0) { |
3880 | ret = close(client_sock); | |
3881 | if (ret) { | |
3882 | PERROR("close"); | |
3883 | } | |
a4b35e07 | 3884 | } |
35df2755 CB |
3885 | |
3886 | if (err) { | |
840cb59c | 3887 | health_error(); |
35df2755 | 3888 | ERR("Health error occurred in %s", __func__); |
a4b35e07 | 3889 | } |
273ea72c | 3890 | |
8782cc74 | 3891 | health_unregister(health_sessiond); |
35df2755 CB |
3892 | |
3893 | DBG("Client thread dying"); | |
f6a9efaa DG |
3894 | |
3895 | rcu_unregister_thread(); | |
1d4b027a DG |
3896 | return NULL; |
3897 | } | |
3898 | ||
3899 | ||
fac6795d DG |
3900 | /* |
3901 | * usage function on stderr | |
3902 | */ | |
3903 | static void usage(void) | |
3904 | { | |
b716ce68 | 3905 | fprintf(stderr, "Usage: %s OPTIONS\n\nOptions:\n", progname); |
d6f42150 DG |
3906 | fprintf(stderr, " -h, --help Display this usage.\n"); |
3907 | fprintf(stderr, " -c, --client-sock PATH Specify path for the client unix socket\n"); | |
3908 | fprintf(stderr, " -a, --apps-sock PATH Specify path for apps unix socket\n"); | |
3909 | fprintf(stderr, " --kconsumerd-err-sock PATH Specify path for the kernel consumer error socket\n"); | |
3910 | fprintf(stderr, " --kconsumerd-cmd-sock PATH Specify path for the kernel consumer command socket\n"); | |
7753dea8 MD |
3911 | fprintf(stderr, " --ustconsumerd32-err-sock PATH Specify path for the 32-bit UST consumer error socket\n"); |
3912 | fprintf(stderr, " --ustconsumerd64-err-sock PATH Specify path for the 64-bit UST consumer error socket\n"); | |
3913 | fprintf(stderr, " --ustconsumerd32-cmd-sock PATH Specify path for the 32-bit UST consumer command socket\n"); | |
3914 | fprintf(stderr, " --ustconsumerd64-cmd-sock PATH Specify path for the 64-bit UST consumer command socket\n"); | |
ebaeda94 MD |
3915 | fprintf(stderr, " --consumerd32-path PATH Specify path for the 32-bit UST consumer daemon binary\n"); |
3916 | fprintf(stderr, " --consumerd32-libdir PATH Specify path for the 32-bit UST consumer daemon libraries\n"); | |
3917 | fprintf(stderr, " --consumerd64-path PATH Specify path for the 64-bit UST consumer daemon binary\n"); | |
3918 | fprintf(stderr, " --consumerd64-libdir PATH Specify path for the 64-bit UST consumer daemon libraries\n"); | |
d6f42150 DG |
3919 | fprintf(stderr, " -d, --daemonize Start as a daemon.\n"); |
3920 | fprintf(stderr, " -g, --group NAME Specify the tracing group name. (default: tracing)\n"); | |
3921 | fprintf(stderr, " -V, --version Show version number.\n"); | |
3922 | fprintf(stderr, " -S, --sig-parent Send SIGCHLD to parent pid to notify readiness.\n"); | |
3923 | fprintf(stderr, " -q, --quiet No output at all.\n"); | |
3924 | fprintf(stderr, " -v, --verbose Verbose mode. Activate DBG() macro.\n"); | |
35f90c40 | 3925 | fprintf(stderr, " -p, --pidfile FILE Write a pid to FILE name overriding the default value.\n"); |
3bd1e081 | 3926 | fprintf(stderr, " --verbose-consumer Verbose mode for consumer. Activate DBG() macro.\n"); |
4fba7219 | 3927 | fprintf(stderr, " --no-kernel Disable kernel tracer\n"); |
4d076222 | 3928 | fprintf(stderr, " --jul-tcp-port JUL application registration TCP port\n"); |
fac6795d DG |
3929 | } |
3930 | ||
3931 | /* | |
3932 | * daemon argument parsing | |
3933 | */ | |
3934 | static int parse_args(int argc, char **argv) | |
3935 | { | |
3936 | int c; | |
3937 | ||
3938 | static struct option long_options[] = { | |
3939 | { "client-sock", 1, 0, 'c' }, | |
3940 | { "apps-sock", 1, 0, 'a' }, | |
3bd1e081 MD |
3941 | { "kconsumerd-cmd-sock", 1, 0, 'C' }, |
3942 | { "kconsumerd-err-sock", 1, 0, 'E' }, | |
7753dea8 MD |
3943 | { "ustconsumerd32-cmd-sock", 1, 0, 'G' }, |
3944 | { "ustconsumerd32-err-sock", 1, 0, 'H' }, | |
ebaeda94 MD |
3945 | { "ustconsumerd64-cmd-sock", 1, 0, 'D' }, |
3946 | { "ustconsumerd64-err-sock", 1, 0, 'F' }, | |
3947 | { "consumerd32-path", 1, 0, 'u' }, | |
3948 | { "consumerd32-libdir", 1, 0, 'U' }, | |
3949 | { "consumerd64-path", 1, 0, 't' }, | |
3950 | { "consumerd64-libdir", 1, 0, 'T' }, | |
fac6795d | 3951 | { "daemonize", 0, 0, 'd' }, |
5b8719f5 | 3952 | { "sig-parent", 0, 0, 'S' }, |
fac6795d DG |
3953 | { "help", 0, 0, 'h' }, |
3954 | { "group", 1, 0, 'g' }, | |
3955 | { "version", 0, 0, 'V' }, | |
75462a81 | 3956 | { "quiet", 0, 0, 'q' }, |
3f9947db | 3957 | { "verbose", 0, 0, 'v' }, |
3bd1e081 | 3958 | { "verbose-consumer", 0, 0, 'Z' }, |
4fba7219 | 3959 | { "no-kernel", 0, 0, 'N' }, |
35f90c40 | 3960 | { "pidfile", 1, 0, 'p' }, |
4d076222 | 3961 | { "jul-tcp-port", 1, 0, 'J' }, |
fac6795d DG |
3962 | { NULL, 0, 0, 0 } |
3963 | }; | |
3964 | ||
3965 | while (1) { | |
3966 | int option_index = 0; | |
4d076222 | 3967 | c = getopt_long(argc, argv, "dhqvVSN" "a:c:g:s:C:E:D:F:Z:u:t:p:J:", |
54d01ffb | 3968 | long_options, &option_index); |
fac6795d DG |
3969 | if (c == -1) { |
3970 | break; | |
3971 | } | |
3972 | ||
3973 | switch (c) { | |
3974 | case 0: | |
3975 | fprintf(stderr, "option %s", long_options[option_index].name); | |
3976 | if (optarg) { | |
3977 | fprintf(stderr, " with arg %s\n", optarg); | |
3978 | } | |
3979 | break; | |
b716ce68 | 3980 | case 'c': |
fac6795d DG |
3981 | snprintf(client_unix_sock_path, PATH_MAX, "%s", optarg); |
3982 | break; | |
3983 | case 'a': | |
3984 | snprintf(apps_unix_sock_path, PATH_MAX, "%s", optarg); | |
3985 | break; | |
3986 | case 'd': | |
3987 | opt_daemon = 1; | |
3988 | break; | |
3989 | case 'g': | |
6c71277b | 3990 | tracing_group_name = optarg; |
fac6795d DG |
3991 | break; |
3992 | case 'h': | |
3993 | usage(); | |
3994 | exit(EXIT_FAILURE); | |
3995 | case 'V': | |
3996 | fprintf(stdout, "%s\n", VERSION); | |
3997 | exit(EXIT_SUCCESS); | |
5b8719f5 DG |
3998 | case 'S': |
3999 | opt_sig_parent = 1; | |
4000 | break; | |
d6f42150 | 4001 | case 'E': |
3bd1e081 | 4002 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
d6f42150 DG |
4003 | break; |
4004 | case 'C': | |
3bd1e081 MD |
4005 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
4006 | break; | |
4007 | case 'F': | |
7753dea8 | 4008 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, "%s", optarg); |
3bd1e081 MD |
4009 | break; |
4010 | case 'D': | |
7753dea8 MD |
4011 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); |
4012 | break; | |
4013 | case 'H': | |
4014 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, "%s", optarg); | |
4015 | break; | |
4016 | case 'G': | |
4017 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, "%s", optarg); | |
d6f42150 | 4018 | break; |
4fba7219 DG |
4019 | case 'N': |
4020 | opt_no_kernel = 1; | |
4021 | break; | |
75462a81 | 4022 | case 'q': |
97e19046 | 4023 | lttng_opt_quiet = 1; |
75462a81 | 4024 | break; |
3f9947db | 4025 | case 'v': |
53086306 | 4026 | /* Verbose level can increase using multiple -v */ |
97e19046 | 4027 | lttng_opt_verbose += 1; |
3f9947db | 4028 | break; |
31f73cc9 | 4029 | case 'Z': |
3bd1e081 | 4030 | opt_verbose_consumer += 1; |
31f73cc9 | 4031 | break; |
fb09408a | 4032 | case 'u': |
fc7a59ce | 4033 | consumerd32_bin= optarg; |
ebaeda94 MD |
4034 | break; |
4035 | case 'U': | |
4036 | consumerd32_libdir = optarg; | |
7753dea8 MD |
4037 | break; |
4038 | case 't': | |
fc7a59ce | 4039 | consumerd64_bin = optarg; |
ebaeda94 MD |
4040 | break; |
4041 | case 'T': | |
4042 | consumerd64_libdir = optarg; | |
fb09408a | 4043 | break; |
35f90c40 DG |
4044 | case 'p': |
4045 | opt_pidfile = optarg; | |
4046 | break; | |
4d076222 DG |
4047 | case 'J': /* JUL TCP port. */ |
4048 | { | |
4049 | unsigned long v; | |
4050 | ||
4051 | errno = 0; | |
4052 | v = strtoul(optarg, NULL, 0); | |
4053 | if (errno != 0 || !isdigit(optarg[0])) { | |
4054 | ERR("Wrong value in --jul-tcp-port parameter: %s", optarg); | |
4055 | return -1; | |
4056 | } | |
4057 | if (v == 0 || v >= 65535) { | |
4058 | ERR("Port overflow in --jul-tcp-port parameter: %s", optarg); | |
4059 | return -1; | |
4060 | } | |
4061 | jul_tcp_port = (uint32_t) v; | |
4062 | DBG3("JUL TCP port set to non default: %u", jul_tcp_port); | |
4063 | break; | |
4064 | } | |
fac6795d DG |
4065 | default: |
4066 | /* Unknown option or other error. | |
4067 | * Error is printed by getopt, just return */ | |
4068 | return -1; | |
4069 | } | |
4070 | } | |
4071 | ||
4072 | return 0; | |
4073 | } | |
4074 | ||
4075 | /* | |
d063d709 | 4076 | * Creates the two needed socket by the daemon. |
d6f42150 DG |
4077 | * apps_sock - The communication socket for all UST apps. |
4078 | * client_sock - The communication of the cli tool (lttng). | |
fac6795d | 4079 | */ |
cf3af59e | 4080 | static int init_daemon_socket(void) |
fac6795d DG |
4081 | { |
4082 | int ret = 0; | |
4083 | mode_t old_umask; | |
4084 | ||
4085 | old_umask = umask(0); | |
4086 | ||
4087 | /* Create client tool unix socket */ | |
d6f42150 DG |
4088 | client_sock = lttcomm_create_unix_sock(client_unix_sock_path); |
4089 | if (client_sock < 0) { | |
4090 | ERR("Create unix sock failed: %s", client_unix_sock_path); | |
fac6795d DG |
4091 | ret = -1; |
4092 | goto end; | |
4093 | } | |
4094 | ||
b662582b DG |
4095 | /* Set the cloexec flag */ |
4096 | ret = utils_set_fd_cloexec(client_sock); | |
4097 | if (ret < 0) { | |
4098 | ERR("Unable to set CLOEXEC flag to the client Unix socket (fd: %d). " | |
4099 | "Continuing but note that the consumer daemon will have a " | |
4100 | "reference to this socket on exec()", client_sock); | |
4101 | } | |
4102 | ||
fac6795d DG |
4103 | /* File permission MUST be 660 */ |
4104 | ret = chmod(client_unix_sock_path, S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); | |
4105 | if (ret < 0) { | |
d6f42150 | 4106 | ERR("Set file permissions failed: %s", client_unix_sock_path); |
76d7553f | 4107 | PERROR("chmod"); |
fac6795d DG |
4108 | goto end; |
4109 | } | |
4110 | ||
4111 | /* Create the application unix socket */ | |
d6f42150 DG |
4112 | apps_sock = lttcomm_create_unix_sock(apps_unix_sock_path); |
4113 | if (apps_sock < 0) { | |
4114 | ERR("Create unix sock failed: %s", apps_unix_sock_path); | |
fac6795d DG |
4115 | ret = -1; |
4116 | goto end; | |
4117 | } | |
4118 | ||
b662582b DG |
4119 | /* Set the cloexec flag */ |
4120 | ret = utils_set_fd_cloexec(apps_sock); | |
4121 | if (ret < 0) { | |
4122 | ERR("Unable to set CLOEXEC flag to the app Unix socket (fd: %d). " | |
4123 | "Continuing but note that the consumer daemon will have a " | |
4124 | "reference to this socket on exec()", apps_sock); | |
4125 | } | |
4126 | ||
d6f42150 | 4127 | /* File permission MUST be 666 */ |
54d01ffb DG |
4128 | ret = chmod(apps_unix_sock_path, |
4129 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH); | |
fac6795d | 4130 | if (ret < 0) { |
d6f42150 | 4131 | ERR("Set file permissions failed: %s", apps_unix_sock_path); |
76d7553f | 4132 | PERROR("chmod"); |
fac6795d DG |
4133 | goto end; |
4134 | } | |
4135 | ||
b662582b DG |
4136 | DBG3("Session daemon client socket %d and application socket %d created", |
4137 | client_sock, apps_sock); | |
4138 | ||
fac6795d DG |
4139 | end: |
4140 | umask(old_umask); | |
4141 | return ret; | |
4142 | } | |
4143 | ||
4144 | /* | |
54d01ffb DG |
4145 | * Check if the global socket is available, and if a daemon is answering at the |
4146 | * other side. If yes, error is returned. | |
fac6795d | 4147 | */ |
cf3af59e | 4148 | static int check_existing_daemon(void) |
fac6795d | 4149 | { |
7d8234d9 | 4150 | /* Is there anybody out there ? */ |
099e26bd | 4151 | if (lttng_session_daemon_alive()) { |
7d8234d9 | 4152 | return -EEXIST; |
099e26bd | 4153 | } |
b09c7c76 DG |
4154 | |
4155 | return 0; | |
fac6795d DG |
4156 | } |
4157 | ||
fac6795d | 4158 | /* |
d063d709 | 4159 | * Set the tracing group gid onto the client socket. |
5e16da05 | 4160 | * |
d063d709 | 4161 | * Race window between mkdir and chown is OK because we are going from more |
d1613cf5 | 4162 | * permissive (root.root) to less permissive (root.tracing). |
fac6795d | 4163 | */ |
be040666 | 4164 | static int set_permissions(char *rundir) |
fac6795d DG |
4165 | { |
4166 | int ret; | |
996b65c8 | 4167 | gid_t gid; |
fac6795d | 4168 | |
6c71277b | 4169 | gid = utils_get_group_id(tracing_group_name); |
fac6795d | 4170 | |
d6f42150 | 4171 | /* Set lttng run dir */ |
be040666 | 4172 | ret = chown(rundir, 0, gid); |
d6f42150 | 4173 | if (ret < 0) { |
be040666 | 4174 | ERR("Unable to set group on %s", rundir); |
76d7553f | 4175 | PERROR("chown"); |
d6f42150 DG |
4176 | } |
4177 | ||
6c71277b MD |
4178 | /* |
4179 | * Ensure all applications and tracing group can search the run | |
4180 | * dir. Allow everyone to read the directory, since it does not | |
4181 | * buy us anything to hide its content. | |
4182 | */ | |
4183 | ret = chmod(rundir, S_IRWXU | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH); | |
d1613cf5 JN |
4184 | if (ret < 0) { |
4185 | ERR("Unable to set permissions on %s", rundir); | |
76d7553f | 4186 | PERROR("chmod"); |
d1613cf5 JN |
4187 | } |
4188 | ||
d6f42150 | 4189 | /* lttng client socket path */ |
996b65c8 | 4190 | ret = chown(client_unix_sock_path, 0, gid); |
fac6795d | 4191 | if (ret < 0) { |
d6f42150 | 4192 | ERR("Unable to set group on %s", client_unix_sock_path); |
76d7553f | 4193 | PERROR("chown"); |
d6f42150 DG |
4194 | } |
4195 | ||
3bd1e081 | 4196 | /* kconsumer error socket path */ |
6c71277b | 4197 | ret = chown(kconsumer_data.err_unix_sock_path, 0, 0); |
d6f42150 | 4198 | if (ret < 0) { |
3bd1e081 | 4199 | ERR("Unable to set group on %s", kconsumer_data.err_unix_sock_path); |
76d7553f | 4200 | PERROR("chown"); |
3bd1e081 MD |
4201 | } |
4202 | ||
7753dea8 | 4203 | /* 64-bit ustconsumer error socket path */ |
6c71277b | 4204 | ret = chown(ustconsumer64_data.err_unix_sock_path, 0, 0); |
7753dea8 MD |
4205 | if (ret < 0) { |
4206 | ERR("Unable to set group on %s", ustconsumer64_data.err_unix_sock_path); | |
76d7553f | 4207 | PERROR("chown"); |
7753dea8 MD |
4208 | } |
4209 | ||
4210 | /* 32-bit ustconsumer compat32 error socket path */ | |
6c71277b | 4211 | ret = chown(ustconsumer32_data.err_unix_sock_path, 0, 0); |
3bd1e081 | 4212 | if (ret < 0) { |
7753dea8 | 4213 | ERR("Unable to set group on %s", ustconsumer32_data.err_unix_sock_path); |
76d7553f | 4214 | PERROR("chown"); |
fac6795d DG |
4215 | } |
4216 | ||
d6f42150 | 4217 | DBG("All permissions are set"); |
e07ae692 | 4218 | |
fac6795d DG |
4219 | return ret; |
4220 | } | |
4221 | ||
d6f42150 | 4222 | /* |
d063d709 | 4223 | * Create the lttng run directory needed for all global sockets and pipe. |
d6f42150 | 4224 | */ |
67e40797 | 4225 | static int create_lttng_rundir(const char *rundir) |
d6f42150 DG |
4226 | { |
4227 | int ret; | |
4228 | ||
67e40797 DG |
4229 | DBG3("Creating LTTng run directory: %s", rundir); |
4230 | ||
d1613cf5 | 4231 | ret = mkdir(rundir, S_IRWXU); |
d6f42150 | 4232 | if (ret < 0) { |
b1f11e69 | 4233 | if (errno != EEXIST) { |
67e40797 | 4234 | ERR("Unable to create %s", rundir); |
b1f11e69 DG |
4235 | goto error; |
4236 | } else { | |
4237 | ret = 0; | |
4238 | } | |
d6f42150 DG |
4239 | } |
4240 | ||
4241 | error: | |
4242 | return ret; | |
4243 | } | |
4244 | ||
4245 | /* | |
d063d709 DG |
4246 | * Setup sockets and directory needed by the kconsumerd communication with the |
4247 | * session daemon. | |
d6f42150 | 4248 | */ |
67e40797 DG |
4249 | static int set_consumer_sockets(struct consumer_data *consumer_data, |
4250 | const char *rundir) | |
d6f42150 DG |
4251 | { |
4252 | int ret; | |
67e40797 | 4253 | char path[PATH_MAX]; |
d6f42150 | 4254 | |
6c71277b | 4255 | switch (consumer_data->type) { |
7753dea8 | 4256 | case LTTNG_CONSUMER_KERNEL: |
60922cb0 | 4257 | snprintf(path, PATH_MAX, DEFAULT_KCONSUMERD_PATH, rundir); |
7753dea8 MD |
4258 | break; |
4259 | case LTTNG_CONSUMER64_UST: | |
60922cb0 | 4260 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD64_PATH, rundir); |
7753dea8 MD |
4261 | break; |
4262 | case LTTNG_CONSUMER32_UST: | |
60922cb0 | 4263 | snprintf(path, PATH_MAX, DEFAULT_USTCONSUMERD32_PATH, rundir); |
7753dea8 MD |
4264 | break; |
4265 | default: | |
4266 | ERR("Consumer type unknown"); | |
4267 | ret = -EINVAL; | |
4268 | goto error; | |
d6f42150 DG |
4269 | } |
4270 | ||
67e40797 DG |
4271 | DBG2("Creating consumer directory: %s", path); |
4272 | ||
6c71277b | 4273 | ret = mkdir(path, S_IRWXU | S_IRGRP | S_IXGRP); |
d6f42150 | 4274 | if (ret < 0) { |
6beb2242 | 4275 | if (errno != EEXIST) { |
f11e84c2 | 4276 | PERROR("mkdir"); |
3bd1e081 | 4277 | ERR("Failed to create %s", path); |
6beb2242 DG |
4278 | goto error; |
4279 | } | |
f11e84c2 | 4280 | ret = -1; |
d6f42150 | 4281 | } |
6c71277b MD |
4282 | if (is_root) { |
4283 | ret = chown(path, 0, utils_get_group_id(tracing_group_name)); | |
4284 | if (ret < 0) { | |
4285 | ERR("Unable to set group on %s", path); | |
4286 | PERROR("chown"); | |
4287 | goto error; | |
4288 | } | |
4289 | } | |
d6f42150 DG |
4290 | |
4291 | /* Create the kconsumerd error unix socket */ | |
3bd1e081 MD |
4292 | consumer_data->err_sock = |
4293 | lttcomm_create_unix_sock(consumer_data->err_unix_sock_path); | |
4294 | if (consumer_data->err_sock < 0) { | |
4295 | ERR("Create unix sock failed: %s", consumer_data->err_unix_sock_path); | |
d6f42150 DG |
4296 | ret = -1; |
4297 | goto error; | |
4298 | } | |
4299 | ||
a24f05ab MD |
4300 | /* |
4301 | * Set the CLOEXEC flag. Return code is useless because either way, the | |
4302 | * show must go on. | |
4303 | */ | |
4304 | ret = utils_set_fd_cloexec(consumer_data->err_sock); | |
4305 | if (ret < 0) { | |
4306 | PERROR("utils_set_fd_cloexec"); | |
4307 | /* continue anyway */ | |
4308 | } | |
4309 | ||
d6f42150 | 4310 | /* File permission MUST be 660 */ |
3bd1e081 | 4311 | ret = chmod(consumer_data->err_unix_sock_path, |
54d01ffb | 4312 | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP); |
d6f42150 | 4313 | if (ret < 0) { |
3bd1e081 | 4314 | ERR("Set file permissions failed: %s", consumer_data->err_unix_sock_path); |
67e40797 | 4315 | PERROR("chmod"); |
d6f42150 DG |
4316 | goto error; |
4317 | } | |
4318 | ||
4319 | error: | |
4320 | return ret; | |
4321 | } | |
4322 | ||
fac6795d | 4323 | /* |
d063d709 | 4324 | * Signal handler for the daemon |
cf3af59e | 4325 | * |
54d01ffb DG |
4326 | * Simply stop all worker threads, leaving main() return gracefully after |
4327 | * joining all threads and calling cleanup(). | |
fac6795d DG |
4328 | */ |
4329 | static void sighandler(int sig) | |
4330 | { | |
4331 | switch (sig) { | |
cf3af59e | 4332 | case SIGPIPE: |
af87c45a | 4333 | DBG("SIGPIPE caught"); |
cf3af59e MD |
4334 | return; |
4335 | case SIGINT: | |
af87c45a | 4336 | DBG("SIGINT caught"); |
cf3af59e MD |
4337 | stop_threads(); |
4338 | break; | |
4339 | case SIGTERM: | |
af87c45a | 4340 | DBG("SIGTERM caught"); |
cf3af59e MD |
4341 | stop_threads(); |
4342 | break; | |
4343 | default: | |
4344 | break; | |
fac6795d | 4345 | } |
fac6795d DG |
4346 | } |
4347 | ||
4348 | /* | |
d063d709 | 4349 | * Setup signal handler for : |
1d4b027a | 4350 | * SIGINT, SIGTERM, SIGPIPE |
fac6795d | 4351 | */ |
1d4b027a | 4352 | static int set_signal_handler(void) |
fac6795d | 4353 | { |
1d4b027a DG |
4354 | int ret = 0; |
4355 | struct sigaction sa; | |
4356 | sigset_t sigset; | |
fac6795d | 4357 | |
1d4b027a | 4358 | if ((ret = sigemptyset(&sigset)) < 0) { |
76d7553f | 4359 | PERROR("sigemptyset"); |
1d4b027a DG |
4360 | return ret; |
4361 | } | |
d6f42150 | 4362 | |
1d4b027a DG |
4363 | sa.sa_handler = sighandler; |
4364 | sa.sa_mask = sigset; | |
4365 | sa.sa_flags = 0; | |
4366 | if ((ret = sigaction(SIGTERM, &sa, NULL)) < 0) { | |
76d7553f | 4367 | PERROR("sigaction"); |
1d4b027a | 4368 | return ret; |
d6f42150 DG |
4369 | } |
4370 | ||
1d4b027a | 4371 | if ((ret = sigaction(SIGINT, &sa, NULL)) < 0) { |
76d7553f | 4372 | PERROR("sigaction"); |
1d4b027a | 4373 | return ret; |
d6f42150 | 4374 | } |
aaf26714 | 4375 | |
1d4b027a | 4376 | if ((ret = sigaction(SIGPIPE, &sa, NULL)) < 0) { |
76d7553f | 4377 | PERROR("sigaction"); |
1d4b027a | 4378 | return ret; |
8c0faa1d DG |
4379 | } |
4380 | ||
1d4b027a DG |
4381 | DBG("Signal handler set for SIGTERM, SIGPIPE and SIGINT"); |
4382 | ||
4383 | return ret; | |
fac6795d DG |
4384 | } |
4385 | ||
f3ed775e | 4386 | /* |
d063d709 DG |
4387 | * Set open files limit to unlimited. This daemon can open a large number of |
4388 | * file descriptors in order to consumer multiple kernel traces. | |
f3ed775e DG |
4389 | */ |
4390 | static void set_ulimit(void) | |
4391 | { | |
4392 | int ret; | |
4393 | struct rlimit lim; | |
4394 | ||
a88df331 | 4395 | /* The kernel does not allowed an infinite limit for open files */ |
f3ed775e DG |
4396 | lim.rlim_cur = 65535; |
4397 | lim.rlim_max = 65535; | |
4398 | ||
4399 | ret = setrlimit(RLIMIT_NOFILE, &lim); | |
4400 | if (ret < 0) { | |
76d7553f | 4401 | PERROR("failed to set open files limit"); |
f3ed775e DG |
4402 | } |
4403 | } | |
4404 | ||
35f90c40 DG |
4405 | /* |
4406 | * Write pidfile using the rundir and opt_pidfile. | |
4407 | */ | |
4408 | static void write_pidfile(void) | |
4409 | { | |
4410 | int ret; | |
4411 | char pidfile_path[PATH_MAX]; | |
4412 | ||
4413 | assert(rundir); | |
4414 | ||
4415 | if (opt_pidfile) { | |
4416 | strncpy(pidfile_path, opt_pidfile, sizeof(pidfile_path)); | |
4417 | } else { | |
4418 | /* Build pidfile path from rundir and opt_pidfile. */ | |
4419 | ret = snprintf(pidfile_path, sizeof(pidfile_path), "%s/" | |
4420 | DEFAULT_LTTNG_SESSIOND_PIDFILE, rundir); | |
4421 | if (ret < 0) { | |
4422 | PERROR("snprintf pidfile path"); | |
4423 | goto error; | |
4424 | } | |
4425 | } | |
4426 | ||
4427 | /* | |
4428 | * Create pid file in rundir. Return value is of no importance. The | |
4429 | * execution will continue even though we are not able to write the file. | |
4430 | */ | |
4431 | (void) utils_create_pid_file(getpid(), pidfile_path); | |
4432 | ||
4433 | error: | |
4434 | return; | |
4435 | } | |
4436 | ||
cd9290dd DG |
4437 | /* |
4438 | * Write JUL TCP port using the rundir. | |
4439 | */ | |
4440 | static void write_julport(void) | |
4441 | { | |
4442 | int ret; | |
4443 | char path[PATH_MAX]; | |
4444 | ||
4445 | assert(rundir); | |
4446 | ||
4447 | ret = snprintf(path, sizeof(path), "%s/" | |
4448 | DEFAULT_LTTNG_SESSIOND_JULPORT_FILE, rundir); | |
4449 | if (ret < 0) { | |
4450 | PERROR("snprintf julport path"); | |
4451 | goto error; | |
4452 | } | |
4453 | ||
4454 | /* | |
4455 | * Create TCP JUL port file in rundir. Return value is of no importance. | |
4456 | * The execution will continue even though we are not able to write the | |
4457 | * file. | |
4458 | */ | |
4459 | (void) utils_create_pid_file(jul_tcp_port, path); | |
4460 | ||
4461 | error: | |
4462 | return; | |
4463 | } | |
4464 | ||
fac6795d DG |
4465 | /* |
4466 | * main | |
4467 | */ | |
4468 | int main(int argc, char **argv) | |
4469 | { | |
fac6795d DG |
4470 | int ret = 0; |
4471 | void *status; | |
ae9e45b3 | 4472 | const char *home_path, *env_app_timeout; |
fac6795d | 4473 | |
335a95b7 MD |
4474 | init_kernel_workarounds(); |
4475 | ||
f6a9efaa DG |
4476 | rcu_register_thread(); |
4477 | ||
7753dea8 | 4478 | setup_consumerd_path(); |
fb09408a | 4479 | |
12744796 DG |
4480 | page_size = sysconf(_SC_PAGESIZE); |
4481 | if (page_size < 0) { | |
4482 | PERROR("sysconf _SC_PAGESIZE"); | |
4483 | page_size = LONG_MAX; | |
4484 | WARN("Fallback page size to %ld", page_size); | |
4485 | } | |
4486 | ||
fac6795d DG |
4487 | /* Parse arguments */ |
4488 | progname = argv[0]; | |
c617c0c6 | 4489 | if ((ret = parse_args(argc, argv)) < 0) { |
cf3af59e | 4490 | goto error; |
fac6795d DG |
4491 | } |
4492 | ||
4493 | /* Daemonize */ | |
4494 | if (opt_daemon) { | |
ceed52b5 MD |
4495 | int i; |
4496 | ||
4497 | /* | |
4498 | * fork | |
4499 | * child: setsid, close FD 0, 1, 2, chdir / | |
4500 | * parent: exit (if fork is successful) | |
4501 | */ | |
53094c05 DG |
4502 | ret = daemon(0, 0); |
4503 | if (ret < 0) { | |
76d7553f | 4504 | PERROR("daemon"); |
cf3af59e | 4505 | goto error; |
53094c05 | 4506 | } |
ceed52b5 MD |
4507 | /* |
4508 | * We are in the child. Make sure all other file | |
4509 | * descriptors are closed, in case we are called with | |
4510 | * more opened file descriptors than the standard ones. | |
4511 | */ | |
4512 | for (i = 3; i < sysconf(_SC_OPEN_MAX); i++) { | |
4513 | (void) close(i); | |
4514 | } | |
4515 | } | |
4516 | ||
4517 | /* Create thread quit pipe */ | |
4518 | if ((ret = init_thread_quit_pipe()) < 0) { | |
4519 | goto error; | |
fac6795d DG |
4520 | } |
4521 | ||
4522 | /* Check if daemon is UID = 0 */ | |
4523 | is_root = !getuid(); | |
4524 | ||
fac6795d | 4525 | if (is_root) { |
990570ed | 4526 | rundir = strdup(DEFAULT_LTTNG_RUNDIR); |
67e40797 DG |
4527 | |
4528 | /* Create global run dir with root access */ | |
4529 | ret = create_lttng_rundir(rundir); | |
d6f42150 | 4530 | if (ret < 0) { |
cf3af59e | 4531 | goto error; |
d6f42150 DG |
4532 | } |
4533 | ||
fac6795d | 4534 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 DG |
4535 | snprintf(apps_unix_sock_path, PATH_MAX, |
4536 | DEFAULT_GLOBAL_APPS_UNIX_SOCK); | |
fac6795d DG |
4537 | } |
4538 | ||
4539 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 DG |
4540 | snprintf(client_unix_sock_path, PATH_MAX, |
4541 | DEFAULT_GLOBAL_CLIENT_UNIX_SOCK); | |
4542 | } | |
0fdd1e2c DG |
4543 | |
4544 | /* Set global SHM for ust */ | |
4545 | if (strlen(wait_shm_path) == 0) { | |
4546 | snprintf(wait_shm_path, PATH_MAX, | |
4547 | DEFAULT_GLOBAL_APPS_WAIT_SHM_PATH); | |
4548 | } | |
67e40797 | 4549 | |
44a5e5eb DG |
4550 | if (strlen(health_unix_sock_path) == 0) { |
4551 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4552 | DEFAULT_GLOBAL_HEALTH_UNIX_SOCK); | |
4553 | } | |
4554 | ||
67e40797 DG |
4555 | /* Setup kernel consumerd path */ |
4556 | snprintf(kconsumer_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4557 | DEFAULT_KCONSUMERD_ERR_SOCK_PATH, rundir); |
67e40797 | 4558 | snprintf(kconsumer_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4559 | DEFAULT_KCONSUMERD_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4560 | |
4561 | DBG2("Kernel consumer err path: %s", | |
4562 | kconsumer_data.err_unix_sock_path); | |
4563 | DBG2("Kernel consumer cmd path: %s", | |
4564 | kconsumer_data.cmd_unix_sock_path); | |
fac6795d | 4565 | } else { |
feb0f3e5 | 4566 | home_path = utils_get_home_dir(); |
b082db07 | 4567 | if (home_path == NULL) { |
273ea72c DG |
4568 | /* TODO: Add --socket PATH option */ |
4569 | ERR("Can't get HOME directory for sockets creation."); | |
cf3af59e MD |
4570 | ret = -EPERM; |
4571 | goto error; | |
b082db07 DG |
4572 | } |
4573 | ||
67e40797 DG |
4574 | /* |
4575 | * Create rundir from home path. This will create something like | |
4576 | * $HOME/.lttng | |
4577 | */ | |
990570ed | 4578 | ret = asprintf(&rundir, DEFAULT_LTTNG_HOME_RUNDIR, home_path); |
67e40797 DG |
4579 | if (ret < 0) { |
4580 | ret = -ENOMEM; | |
4581 | goto error; | |
4582 | } | |
4583 | ||
4584 | ret = create_lttng_rundir(rundir); | |
4585 | if (ret < 0) { | |
4586 | goto error; | |
4587 | } | |
4588 | ||
fac6795d | 4589 | if (strlen(apps_unix_sock_path) == 0) { |
d6f42150 | 4590 | snprintf(apps_unix_sock_path, PATH_MAX, |
b082db07 | 4591 | DEFAULT_HOME_APPS_UNIX_SOCK, home_path); |
fac6795d DG |
4592 | } |
4593 | ||
4594 | /* Set the cli tool unix socket path */ | |
4595 | if (strlen(client_unix_sock_path) == 0) { | |
d6f42150 | 4596 | snprintf(client_unix_sock_path, PATH_MAX, |
b082db07 | 4597 | DEFAULT_HOME_CLIENT_UNIX_SOCK, home_path); |
fac6795d | 4598 | } |
0fdd1e2c DG |
4599 | |
4600 | /* Set global SHM for ust */ | |
4601 | if (strlen(wait_shm_path) == 0) { | |
4602 | snprintf(wait_shm_path, PATH_MAX, | |
d0b96690 | 4603 | DEFAULT_HOME_APPS_WAIT_SHM_PATH, getuid()); |
0fdd1e2c | 4604 | } |
44a5e5eb DG |
4605 | |
4606 | /* Set health check Unix path */ | |
4607 | if (strlen(health_unix_sock_path) == 0) { | |
4608 | snprintf(health_unix_sock_path, sizeof(health_unix_sock_path), | |
4609 | DEFAULT_HOME_HEALTH_UNIX_SOCK, home_path); | |
4610 | } | |
fac6795d DG |
4611 | } |
4612 | ||
5c827ce0 DG |
4613 | /* Set consumer initial state */ |
4614 | kernel_consumerd_state = CONSUMER_STOPPED; | |
4615 | ust_consumerd_state = CONSUMER_STOPPED; | |
4616 | ||
847177cd DG |
4617 | DBG("Client socket path %s", client_unix_sock_path); |
4618 | DBG("Application socket path %s", apps_unix_sock_path); | |
d0b96690 | 4619 | DBG("Application wait path %s", wait_shm_path); |
67e40797 DG |
4620 | DBG("LTTng run directory path: %s", rundir); |
4621 | ||
4622 | /* 32 bits consumerd path setup */ | |
4623 | snprintf(ustconsumer32_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4624 | DEFAULT_USTCONSUMERD32_ERR_SOCK_PATH, rundir); |
67e40797 | 4625 | snprintf(ustconsumer32_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4626 | DEFAULT_USTCONSUMERD32_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4627 | |
4628 | DBG2("UST consumer 32 bits err path: %s", | |
4629 | ustconsumer32_data.err_unix_sock_path); | |
4630 | DBG2("UST consumer 32 bits cmd path: %s", | |
4631 | ustconsumer32_data.cmd_unix_sock_path); | |
4632 | ||
4633 | /* 64 bits consumerd path setup */ | |
4634 | snprintf(ustconsumer64_data.err_unix_sock_path, PATH_MAX, | |
60922cb0 | 4635 | DEFAULT_USTCONSUMERD64_ERR_SOCK_PATH, rundir); |
67e40797 | 4636 | snprintf(ustconsumer64_data.cmd_unix_sock_path, PATH_MAX, |
60922cb0 | 4637 | DEFAULT_USTCONSUMERD64_CMD_SOCK_PATH, rundir); |
67e40797 DG |
4638 | |
4639 | DBG2("UST consumer 64 bits err path: %s", | |
4640 | ustconsumer64_data.err_unix_sock_path); | |
4641 | DBG2("UST consumer 64 bits cmd path: %s", | |
4642 | ustconsumer64_data.cmd_unix_sock_path); | |
847177cd | 4643 | |
273ea72c | 4644 | /* |
7d8234d9 | 4645 | * See if daemon already exist. |
fac6795d | 4646 | */ |
7d8234d9 | 4647 | if ((ret = check_existing_daemon()) < 0) { |
75462a81 | 4648 | ERR("Already running daemon.\n"); |
273ea72c | 4649 | /* |
cf3af59e MD |
4650 | * We do not goto exit because we must not cleanup() |
4651 | * because a daemon is already running. | |
ab118b20 | 4652 | */ |
cf3af59e | 4653 | goto error; |
a88df331 DG |
4654 | } |
4655 | ||
1427f9b2 DG |
4656 | /* |
4657 | * Init UST app hash table. Alloc hash table before this point since | |
4658 | * cleanup() can get called after that point. | |
4659 | */ | |
4660 | ust_app_ht_alloc(); | |
4661 | ||
f20baf8e DG |
4662 | /* Initialize JUL domain subsystem. */ |
4663 | if ((ret = jul_init()) < 0) { | |
4664 | /* ENOMEM at this point. */ | |
4665 | goto error; | |
4666 | } | |
4667 | ||
54d01ffb | 4668 | /* After this point, we can safely call cleanup() with "goto exit" */ |
a88df331 DG |
4669 | |
4670 | /* | |
4671 | * These actions must be executed as root. We do that *after* setting up | |
4672 | * the sockets path because we MUST make the check for another daemon using | |
4673 | * those paths *before* trying to set the kernel consumer sockets and init | |
4674 | * kernel tracer. | |
4675 | */ | |
4676 | if (is_root) { | |
67e40797 | 4677 | ret = set_consumer_sockets(&kconsumer_data, rundir); |
7753dea8 MD |
4678 | if (ret < 0) { |
4679 | goto exit; | |
4680 | } | |
4681 | ||
a88df331 | 4682 | /* Setup kernel tracer */ |
4fba7219 DG |
4683 | if (!opt_no_kernel) { |
4684 | init_kernel_tracer(); | |
4685 | } | |
a88df331 DG |
4686 | |
4687 | /* Set ulimit for open files */ | |
4688 | set_ulimit(); | |
fac6795d | 4689 | } |
4063050c MD |
4690 | /* init lttng_fd tracking must be done after set_ulimit. */ |
4691 | lttng_fd_init(); | |
fac6795d | 4692 | |
67e40797 DG |
4693 | ret = set_consumer_sockets(&ustconsumer64_data, rundir); |
4694 | if (ret < 0) { | |
4695 | goto exit; | |
4696 | } | |
4697 | ||
4698 | ret = set_consumer_sockets(&ustconsumer32_data, rundir); | |
4699 | if (ret < 0) { | |
4700 | goto exit; | |
4701 | } | |
4702 | ||
cf3af59e MD |
4703 | if ((ret = set_signal_handler()) < 0) { |
4704 | goto exit; | |
fac6795d DG |
4705 | } |
4706 | ||
d6f42150 | 4707 | /* Setup the needed unix socket */ |
cf3af59e MD |
4708 | if ((ret = init_daemon_socket()) < 0) { |
4709 | goto exit; | |
fac6795d DG |
4710 | } |
4711 | ||
4712 | /* Set credentials to socket */ | |
be040666 | 4713 | if (is_root && ((ret = set_permissions(rundir)) < 0)) { |
cf3af59e | 4714 | goto exit; |
fac6795d DG |
4715 | } |
4716 | ||
5b8719f5 DG |
4717 | /* Get parent pid if -S, --sig-parent is specified. */ |
4718 | if (opt_sig_parent) { | |
4719 | ppid = getppid(); | |
4720 | } | |
4721 | ||
7a485870 | 4722 | /* Setup the kernel pipe for waking up the kernel thread */ |
6620da75 DG |
4723 | if (is_root && !opt_no_kernel) { |
4724 | if ((ret = utils_create_pipe_cloexec(kernel_poll_pipe)) < 0) { | |
4725 | goto exit; | |
4726 | } | |
7a485870 DG |
4727 | } |
4728 | ||
0b2dc8df MD |
4729 | /* Setup the thread ht_cleanup communication pipe. */ |
4730 | if (utils_create_pipe_cloexec(ht_cleanup_pipe) < 0) { | |
4731 | goto exit; | |
4732 | } | |
4733 | ||
099e26bd | 4734 | /* Setup the thread apps communication pipe. */ |
ef599319 | 4735 | if ((ret = utils_create_pipe_cloexec(apps_cmd_pipe)) < 0) { |
099e26bd DG |
4736 | goto exit; |
4737 | } | |
4738 | ||
d0b96690 DG |
4739 | /* Setup the thread apps notify communication pipe. */ |
4740 | if (utils_create_pipe_cloexec(apps_cmd_notify_pipe) < 0) { | |
4741 | goto exit; | |
4742 | } | |
4743 | ||
7972aab2 DG |
4744 | /* Initialize global buffer per UID and PID registry. */ |
4745 | buffer_reg_init_uid_registry(); | |
4746 | buffer_reg_init_pid_registry(); | |
4747 | ||
099e26bd DG |
4748 | /* Init UST command queue. */ |
4749 | cds_wfq_init(&ust_cmd_queue.queue); | |
4750 | ||
273ea72c | 4751 | /* |
54d01ffb DG |
4752 | * Get session list pointer. This pointer MUST NOT be free(). This list is |
4753 | * statically declared in session.c | |
273ea72c | 4754 | */ |
54d01ffb | 4755 | session_list_ptr = session_get_list(); |
b5541356 | 4756 | |
5eb91c98 DG |
4757 | /* Set up max poll set size */ |
4758 | lttng_poll_set_max_size(); | |
4759 | ||
2f77fc4b | 4760 | cmd_init(); |
00e2e675 | 4761 | |
ae9e45b3 DG |
4762 | /* Check for the application socket timeout env variable. */ |
4763 | env_app_timeout = getenv(DEFAULT_APP_SOCKET_TIMEOUT_ENV); | |
4764 | if (env_app_timeout) { | |
4765 | app_socket_timeout = atoi(env_app_timeout); | |
4766 | } else { | |
4767 | app_socket_timeout = DEFAULT_APP_SOCKET_RW_TIMEOUT; | |
4768 | } | |
4769 | ||
35f90c40 | 4770 | write_pidfile(); |
cd9290dd | 4771 | write_julport(); |
35f90c40 | 4772 | |
554831e7 MD |
4773 | /* Initialize communication library */ |
4774 | lttcomm_init(); | |
d831c249 DG |
4775 | /* This is to get the TCP timeout value. */ |
4776 | lttcomm_inet_init(); | |
554831e7 | 4777 | |
67e05644 DG |
4778 | /* |
4779 | * Initialize the health check subsystem. This call should set the | |
4780 | * appropriate time values. | |
4781 | */ | |
6c71277b | 4782 | health_sessiond = health_app_create(NR_HEALTH_SESSIOND_TYPES); |
8782cc74 MD |
4783 | if (!health_sessiond) { |
4784 | PERROR("health_app_create error"); | |
4785 | goto exit_health_sessiond_cleanup; | |
4786 | } | |
67e05644 | 4787 | |
0b2dc8df MD |
4788 | /* Create thread to manage the client socket */ |
4789 | ret = pthread_create(&ht_cleanup_thread, NULL, | |
4790 | thread_ht_cleanup, (void *) NULL); | |
4791 | if (ret != 0) { | |
4792 | PERROR("pthread_create ht_cleanup"); | |
4793 | goto exit_ht_cleanup; | |
4794 | } | |
4795 | ||
44a5e5eb DG |
4796 | /* Create thread to manage the client socket */ |
4797 | ret = pthread_create(&health_thread, NULL, | |
4798 | thread_manage_health, (void *) NULL); | |
4799 | if (ret != 0) { | |
4800 | PERROR("pthread_create health"); | |
4801 | goto exit_health; | |
4802 | } | |
4803 | ||
cf3af59e | 4804 | /* Create thread to manage the client socket */ |
099e26bd DG |
4805 | ret = pthread_create(&client_thread, NULL, |
4806 | thread_manage_clients, (void *) NULL); | |
cf3af59e | 4807 | if (ret != 0) { |
76d7553f | 4808 | PERROR("pthread_create clients"); |
cf3af59e MD |
4809 | goto exit_client; |
4810 | } | |
fac6795d | 4811 | |
099e26bd DG |
4812 | /* Create thread to dispatch registration */ |
4813 | ret = pthread_create(&dispatch_thread, NULL, | |
4814 | thread_dispatch_ust_registration, (void *) NULL); | |
4815 | if (ret != 0) { | |
76d7553f | 4816 | PERROR("pthread_create dispatch"); |
099e26bd DG |
4817 | goto exit_dispatch; |
4818 | } | |
4819 | ||
4820 | /* Create thread to manage application registration. */ | |
4821 | ret = pthread_create(®_apps_thread, NULL, | |
4822 | thread_registration_apps, (void *) NULL); | |
4823 | if (ret != 0) { | |
76d7553f | 4824 | PERROR("pthread_create registration"); |
099e26bd DG |
4825 | goto exit_reg_apps; |
4826 | } | |
4827 | ||
cf3af59e | 4828 | /* Create thread to manage application socket */ |
54d01ffb DG |
4829 | ret = pthread_create(&apps_thread, NULL, |
4830 | thread_manage_apps, (void *) NULL); | |
cf3af59e | 4831 | if (ret != 0) { |
d0b96690 DG |
4832 | PERROR("pthread_create apps"); |
4833 | goto exit_apps; | |
4834 | } | |
4835 | ||
4836 | /* Create thread to manage application notify socket */ | |
4837 | ret = pthread_create(&apps_notify_thread, NULL, | |
4838 | ust_thread_manage_notify, (void *) NULL); | |
4839 | if (ret != 0) { | |
76d7553f | 4840 | PERROR("pthread_create apps"); |
9563b0ad | 4841 | goto exit_apps_notify; |
cf3af59e | 4842 | } |
fac6795d | 4843 | |
4d076222 DG |
4844 | /* Create JUL registration thread. */ |
4845 | ret = pthread_create(&jul_reg_thread, NULL, | |
4846 | jul_thread_manage_registration, (void *) NULL); | |
4847 | if (ret != 0) { | |
4848 | PERROR("pthread_create apps"); | |
4849 | goto exit_jul_reg; | |
4850 | } | |
4851 | ||
6620da75 DG |
4852 | /* Don't start this thread if kernel tracing is not requested nor root */ |
4853 | if (is_root && !opt_no_kernel) { | |
4854 | /* Create kernel thread to manage kernel event */ | |
4855 | ret = pthread_create(&kernel_thread, NULL, | |
4856 | thread_manage_kernel, (void *) NULL); | |
4857 | if (ret != 0) { | |
4858 | PERROR("pthread_create kernel"); | |
4859 | goto exit_kernel; | |
4860 | } | |
7a485870 | 4861 | |
6620da75 DG |
4862 | ret = pthread_join(kernel_thread, &status); |
4863 | if (ret != 0) { | |
4864 | PERROR("pthread_join"); | |
4865 | goto error; /* join error, exit without cleanup */ | |
4866 | } | |
fac6795d DG |
4867 | } |
4868 | ||
cf3af59e | 4869 | exit_kernel: |
4d076222 DG |
4870 | ret = pthread_join(jul_reg_thread, &status); |
4871 | if (ret != 0) { | |
4872 | PERROR("pthread_join JUL"); | |
4873 | goto error; /* join error, exit without cleanup */ | |
4874 | } | |
4875 | ||
4876 | exit_jul_reg: | |
9563b0ad DG |
4877 | ret = pthread_join(apps_notify_thread, &status); |
4878 | if (ret != 0) { | |
4879 | PERROR("pthread_join apps notify"); | |
4880 | goto error; /* join error, exit without cleanup */ | |
4881 | } | |
4882 | ||
4883 | exit_apps_notify: | |
cf3af59e MD |
4884 | ret = pthread_join(apps_thread, &status); |
4885 | if (ret != 0) { | |
9563b0ad | 4886 | PERROR("pthread_join apps"); |
cf3af59e MD |
4887 | goto error; /* join error, exit without cleanup */ |
4888 | } | |
fac6795d | 4889 | |
4ccd8c8f | 4890 | |
cf3af59e | 4891 | exit_apps: |
099e26bd DG |
4892 | ret = pthread_join(reg_apps_thread, &status); |
4893 | if (ret != 0) { | |
76d7553f | 4894 | PERROR("pthread_join"); |
099e26bd DG |
4895 | goto error; /* join error, exit without cleanup */ |
4896 | } | |
4897 | ||
4898 | exit_reg_apps: | |
4899 | ret = pthread_join(dispatch_thread, &status); | |
4900 | if (ret != 0) { | |
76d7553f | 4901 | PERROR("pthread_join"); |
099e26bd DG |
4902 | goto error; /* join error, exit without cleanup */ |
4903 | } | |
4904 | ||
4905 | exit_dispatch: | |
cf3af59e MD |
4906 | ret = pthread_join(client_thread, &status); |
4907 | if (ret != 0) { | |
76d7553f | 4908 | PERROR("pthread_join"); |
cf3af59e MD |
4909 | goto error; /* join error, exit without cleanup */ |
4910 | } | |
4911 | ||
3bd1e081 | 4912 | ret = join_consumer_thread(&kconsumer_data); |
cf3af59e | 4913 | if (ret != 0) { |
76d7553f | 4914 | PERROR("join_consumer"); |
cf3af59e MD |
4915 | goto error; /* join error, exit without cleanup */ |
4916 | } | |
a88df331 | 4917 | |
06f525de DG |
4918 | ret = join_consumer_thread(&ustconsumer32_data); |
4919 | if (ret != 0) { | |
4920 | PERROR("join_consumer ust32"); | |
4921 | goto error; /* join error, exit without cleanup */ | |
4922 | } | |
4923 | ||
4924 | ret = join_consumer_thread(&ustconsumer64_data); | |
4925 | if (ret != 0) { | |
4926 | PERROR("join_consumer ust64"); | |
4927 | goto error; /* join error, exit without cleanup */ | |
4928 | } | |
4929 | ||
cf3af59e | 4930 | exit_client: |
06f525de DG |
4931 | ret = pthread_join(health_thread, &status); |
4932 | if (ret != 0) { | |
4933 | PERROR("pthread_join health thread"); | |
4934 | goto error; /* join error, exit without cleanup */ | |
4935 | } | |
4936 | ||
44a5e5eb | 4937 | exit_health: |
0b2dc8df MD |
4938 | ret = pthread_join(ht_cleanup_thread, &status); |
4939 | if (ret != 0) { | |
4940 | PERROR("pthread_join ht cleanup thread"); | |
4941 | goto error; /* join error, exit without cleanup */ | |
4942 | } | |
4943 | exit_ht_cleanup: | |
8782cc74 MD |
4944 | health_app_destroy(health_sessiond); |
4945 | exit_health_sessiond_cleanup: | |
a88df331 | 4946 | exit: |
cf3af59e MD |
4947 | /* |
4948 | * cleanup() is called when no other thread is running. | |
4949 | */ | |
f6a9efaa | 4950 | rcu_thread_online(); |
cf3af59e | 4951 | cleanup(); |
f6a9efaa DG |
4952 | rcu_thread_offline(); |
4953 | rcu_unregister_thread(); | |
67e40797 | 4954 | if (!ret) { |
cf3af59e | 4955 | exit(EXIT_SUCCESS); |
67e40797 | 4956 | } |
cf3af59e | 4957 | error: |
5e16da05 | 4958 | exit(EXIT_FAILURE); |
fac6795d | 4959 | } |